bundle dnspython in support/; resolving is always green

Fixes installation issue when older dnspython is present in system packages
https://github.com/eventlet/eventlet/pull/341

.travis.yml

@@ -6,29 +6,24 @@ env:
     - TOX_ENV=py26-epolls
     - TOX_ENV=py26-poll
     - TOX_ENV=py26-selects
-    - TOX_ENV=py27-dns
     - TOX_ENV=py27-epolls
     - TOX_ENV=py27-poll
     - TOX_ENV=py27-selects
     - TOX_ENV=py33-epolls
     - TOX_ENV=py33-poll
     - TOX_ENV=py33-selects
-    - TOX_ENV=py34-dns
     - TOX_ENV=py34-epolls
     - TOX_ENV=py34-poll
     - TOX_ENV=py34-selects
-    - TOX_ENV=py35-dns
     - TOX_ENV=py35-epolls
     - TOX_ENV=py35-poll
     - TOX_ENV=py35-selects
-    - TOX_ENV=pypy-dns
     - TOX_ENV=pypy-epolls
     - TOX_ENV=pypy-poll
     - TOX_ENV=pypy-selects
 matrix:
   fast_finish: true
   allow_failures:
-    - env: TOX_ENV=pypy-dns
     - env: TOX_ENV=pypy-epolls
     - env: TOX_ENV=pypy-poll
     - env: TOX_ENV=pypy-selects

bin/pull-dnspython

@@ -0,0 +1,13 @@
+#!/bin/bash -eux
+cd "$( dirname "${BASH_SOURCE[0]}" )/.."
+version=${1-188aa701a6826c607da0624e31a8c4618d0a8017}
+upstream_path=./dnspython-${version}
+if [[ ! -d "${upstream_path}" ]]; then
+  curl -L -odnspython.zip "https://github.com/rthalley/dnspython/archive/${version}.zip"
+  unzip dnspython.zip
+  rm dnspython.zip
+fi
+rm -rf eventlet/support/dns
+# patch --directory=eventlet/support -p1 --normal --forward -r/dev/null <./dns.patch
+mv ${upstream_path}/dns eventlet/support/
+rm -rf ${upstream_path}

eventlet/green/socket.py

@@ -1,38 +1,35 @@
 import os
 import sys
+import warnings
 
 __import__('eventlet.green._socket_nodns')
 __socket = sys.modules['eventlet.green._socket_nodns']
 
 __all__ = __socket.__all__
-__patched__ = __socket.__patched__ + ['gethostbyname', 'getaddrinfo', 'create_connection', ]
+__patched__ = __socket.__patched__ + [
+    'create_connection',
+    'getaddrinfo',
+    'gethostbyname',
+    'gethostbyname_ex',
+    'getnameinfo',
+]
 
 from eventlet.patcher import slurp_properties
 slurp_properties(__socket, globals(), srckeys=dir(__socket))
 
 
-greendns = None
-if os.environ.get("EVENTLET_NO_GREENDNS", '').lower() != "yes":
-    try:
-        from eventlet.support import greendns
-    except ImportError as ex:
-        try:
-            import dns
-        except ImportError:
-            # greendns import failed because we don't have dnspython - all is well,
-            # that's why we have the conditional import
-            pass
-        else:
-            # If, however, dnspython is importable yet greendns can't be imported
-            # this suggests there's another issue (like an import cycle)
-            raise
+if os.environ.get("EVENTLET_NO_GREENDNS", '').lower() == "yes":
+    warnings.warn(
+        'EVENTLET_NO_GREENDNS is noop, dnspython is bundled and DNS resolution is always green',
+        DeprecationWarning,
+        stacklevel=2,
+    )
 
-if greendns:
-    gethostbyname = greendns.gethostbyname
-    getaddrinfo = greendns.getaddrinfo
-    gethostbyname_ex = greendns.gethostbyname_ex
-    getnameinfo = greendns.getnameinfo
-    __patched__ = __patched__ + ['gethostbyname_ex', 'getnameinfo']
+from eventlet.support import greendns
+gethostbyname = greendns.gethostbyname
+getaddrinfo = greendns.getaddrinfo
+gethostbyname_ex = greendns.gethostbyname_ex
+getnameinfo = greendns.getnameinfo
 
 
 def create_connection(address,

eventlet/support/dns/__init__.py

@@ -0,0 +1,54 @@
+# Copyright (C) 2003-2007, 2009, 2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""dnspython DNS toolkit"""
+
+__all__ = [
+    'dnssec',
+    'e164',
+    'edns',
+    'entropy',
+    'exception',
+    'flags',
+    'hash',
+    'inet',
+    'ipv4',
+    'ipv6',
+    'message',
+    'name',
+    'namedict',
+    'node',
+    'opcode',
+    'query',
+    'rcode',
+    'rdata',
+    'rdataclass',
+    'rdataset',
+    'rdatatype',
+    'renderer',
+    'resolver',
+    'reversename',
+    'rrset',
+    'set',
+    'tokenizer',
+    'tsig',
+    'tsigkeyring',
+    'ttl',
+    'rdtypes',
+    'update',
+    'version',
+    'wiredata',
+    'zone',
+]

eventlet/support/dns/_compat.py

@@ -0,0 +1,47 @@
+import sys
+import decimal
+from decimal import Context
+
+if sys.version_info > (3,):
+    long = int
+    xrange = range
+else:
+    long = long  # pylint: disable=long-builtin
+    xrange = xrange  # pylint: disable=xrange-builtin
+
+# unicode / binary types
+if sys.version_info > (3,):
+    text_type = str
+    binary_type = bytes
+    string_types = (str,)
+    unichr = chr
+    def maybe_decode(x):
+        return x.decode()
+    def maybe_encode(x):
+        return x.encode()
+else:
+    text_type = unicode  # pylint: disable=unicode-builtin, undefined-variable
+    binary_type = str
+    string_types = (
+        basestring,  # pylint: disable=basestring-builtin, undefined-variable
+    )
+    unichr = unichr  # pylint: disable=unichr-builtin
+    def maybe_decode(x):
+        return x
+    def maybe_encode(x):
+        return x
+
+
+def round_py2_compat(what):
+    """
+    Python 2 and Python 3 use different rounding strategies in round(). This
+    function ensures that results are python2/3 compatible and backward
+    compatible with previous py2 releases
+    :param what: float
+    :return: rounded long
+    """
+    d = Context(
+        prec=len(str(long(what))),  # round to integer with max precision
+        rounding=decimal.ROUND_HALF_UP
+    ).create_decimal(str(what))  # str(): python 2.6 compat
+    return long(d)

eventlet/support/dns/dnssec.py

@@ -0,0 +1,457 @@
+# Copyright (C) 2003-2007, 2009, 2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""Common DNSSEC-related functions and constants."""
+
+from io import BytesIO
+import struct
+import time
+
+import dns.exception
+import dns.hash
+import dns.name
+import dns.node
+import dns.rdataset
+import dns.rdata
+import dns.rdatatype
+import dns.rdataclass
+from ._compat import string_types
+
+
+class UnsupportedAlgorithm(dns.exception.DNSException):
+
+    """The DNSSEC algorithm is not supported."""
+
+
+class ValidationFailure(dns.exception.DNSException):
+
+    """The DNSSEC signature is invalid."""
+
+RSAMD5 = 1
+DH = 2
+DSA = 3
+ECC = 4
+RSASHA1 = 5
+DSANSEC3SHA1 = 6
+RSASHA1NSEC3SHA1 = 7
+RSASHA256 = 8
+RSASHA512 = 10
+ECDSAP256SHA256 = 13
+ECDSAP384SHA384 = 14
+INDIRECT = 252
+PRIVATEDNS = 253
+PRIVATEOID = 254
+
+_algorithm_by_text = {
+    'RSAMD5': RSAMD5,
+    'DH': DH,
+    'DSA': DSA,
+    'ECC': ECC,
+    'RSASHA1': RSASHA1,
+    'DSANSEC3SHA1': DSANSEC3SHA1,
+    'RSASHA1NSEC3SHA1': RSASHA1NSEC3SHA1,
+    'RSASHA256': RSASHA256,
+    'RSASHA512': RSASHA512,
+    'INDIRECT': INDIRECT,
+    'ECDSAP256SHA256': ECDSAP256SHA256,
+    'ECDSAP384SHA384': ECDSAP384SHA384,
+    'PRIVATEDNS': PRIVATEDNS,
+    'PRIVATEOID': PRIVATEOID,
+}
+
+# We construct the inverse mapping programmatically to ensure that we
+# cannot make any mistakes (e.g. omissions, cut-and-paste errors) that
+# would cause the mapping not to be true inverse.
+
+_algorithm_by_value = dict((y, x) for x, y in _algorithm_by_text.items())
+
+
+def algorithm_from_text(text):
+    """Convert text into a DNSSEC algorithm value
+    @rtype: int"""
+
+    value = _algorithm_by_text.get(text.upper())
+    if value is None:
+        value = int(text)
+    return value
+
+
+def algorithm_to_text(value):
+    """Convert a DNSSEC algorithm value to text
+    @rtype: string"""
+
+    text = _algorithm_by_value.get(value)
+    if text is None:
+        text = str(value)
+    return text
+
+
+def _to_rdata(record, origin):
+    s = BytesIO()
+    record.to_wire(s, origin=origin)
+    return s.getvalue()
+
+
+def key_id(key, origin=None):
+    rdata = _to_rdata(key, origin)
+    rdata = bytearray(rdata)
+    if key.algorithm == RSAMD5:
+        return (rdata[-3] << 8) + rdata[-2]
+    else:
+        total = 0
+        for i in range(len(rdata) // 2):
+            total += (rdata[2 * i] << 8) + \
+                rdata[2 * i + 1]
+        if len(rdata) % 2 != 0:
+            total += rdata[len(rdata) - 1] << 8
+        total += ((total >> 16) & 0xffff)
+        return total & 0xffff
+
+
+def make_ds(name, key, algorithm, origin=None):
+    if algorithm.upper() == 'SHA1':
+        dsalg = 1
+        hash = dns.hash.hashes['SHA1']()
+    elif algorithm.upper() == 'SHA256':
+        dsalg = 2
+        hash = dns.hash.hashes['SHA256']()
+    else:
+        raise UnsupportedAlgorithm('unsupported algorithm "%s"' % algorithm)
+
+    if isinstance(name, string_types):
+        name = dns.name.from_text(name, origin)
+    hash.update(name.canonicalize().to_wire())
+    hash.update(_to_rdata(key, origin))
+    digest = hash.digest()
+
+    dsrdata = struct.pack("!HBB", key_id(key), key.algorithm, dsalg) + digest
+    return dns.rdata.from_wire(dns.rdataclass.IN, dns.rdatatype.DS, dsrdata, 0,
+                               len(dsrdata))
+
+
+def _find_candidate_keys(keys, rrsig):
+    candidate_keys = []
+    value = keys.get(rrsig.signer)
+    if value is None:
+        return None
+    if isinstance(value, dns.node.Node):
+        try:
+            rdataset = value.find_rdataset(dns.rdataclass.IN,
+                                           dns.rdatatype.DNSKEY)
+        except KeyError:
+            return None
+    else:
+        rdataset = value
+    for rdata in rdataset:
+        if rdata.algorithm == rrsig.algorithm and \
+                key_id(rdata) == rrsig.key_tag:
+            candidate_keys.append(rdata)
+    return candidate_keys
+
+
+def _is_rsa(algorithm):
+    return algorithm in (RSAMD5, RSASHA1,
+                         RSASHA1NSEC3SHA1, RSASHA256,
+                         RSASHA512)
+
+
+def _is_dsa(algorithm):
+    return algorithm in (DSA, DSANSEC3SHA1)
+
+
+def _is_ecdsa(algorithm):
+    return _have_ecdsa and (algorithm in (ECDSAP256SHA256, ECDSAP384SHA384))
+
+
+def _is_md5(algorithm):
+    return algorithm == RSAMD5
+
+
+def _is_sha1(algorithm):
+    return algorithm in (DSA, RSASHA1,
+                         DSANSEC3SHA1, RSASHA1NSEC3SHA1)
+
+
+def _is_sha256(algorithm):
+    return algorithm in (RSASHA256, ECDSAP256SHA256)
+
+
+def _is_sha384(algorithm):
+    return algorithm == ECDSAP384SHA384
+
+
+def _is_sha512(algorithm):
+    return algorithm == RSASHA512
+
+
+def _make_hash(algorithm):
+    if _is_md5(algorithm):
+        return dns.hash.hashes['MD5']()
+    if _is_sha1(algorithm):
+        return dns.hash.hashes['SHA1']()
+    if _is_sha256(algorithm):
+        return dns.hash.hashes['SHA256']()
+    if _is_sha384(algorithm):
+        return dns.hash.hashes['SHA384']()
+    if _is_sha512(algorithm):
+        return dns.hash.hashes['SHA512']()
+    raise ValidationFailure('unknown hash for algorithm %u' % algorithm)
+
+
+def _make_algorithm_id(algorithm):
+    if _is_md5(algorithm):
+        oid = [0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x02, 0x05]
+    elif _is_sha1(algorithm):
+        oid = [0x2b, 0x0e, 0x03, 0x02, 0x1a]
+    elif _is_sha256(algorithm):
+        oid = [0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01]
+    elif _is_sha512(algorithm):
+        oid = [0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03]
+    else:
+        raise ValidationFailure('unknown algorithm %u' % algorithm)
+    olen = len(oid)
+    dlen = _make_hash(algorithm).digest_size
+    idbytes = [0x30] + [8 + olen + dlen] + \
+              [0x30, olen + 4] + [0x06, olen] + oid + \
+              [0x05, 0x00] + [0x04, dlen]
+    return struct.pack('!%dB' % len(idbytes), *idbytes)
+
+
+def _validate_rrsig(rrset, rrsig, keys, origin=None, now=None):
+    """Validate an RRset against a single signature rdata
+
+    The owner name of the rrsig is assumed to be the same as the owner name
+    of the rrset.
+
+    @param rrset: The RRset to validate
+    @type rrset: dns.rrset.RRset or (dns.name.Name, dns.rdataset.Rdataset)
+    tuple
+    @param rrsig: The signature rdata
+    @type rrsig: dns.rrset.Rdata
+    @param keys: The key dictionary.
+    @type keys: a dictionary keyed by dns.name.Name with node or rdataset
+    values
+    @param origin: The origin to use for relative names
+    @type origin: dns.name.Name or None
+    @param now: The time to use when validating the signatures.  The default
+    is the current time.
+    @type now: int
+    """
+
+    if isinstance(origin, string_types):
+        origin = dns.name.from_text(origin, dns.name.root)
+
+    for candidate_key in _find_candidate_keys(keys, rrsig):
+        if not candidate_key:
+            raise ValidationFailure('unknown key')
+
+        # For convenience, allow the rrset to be specified as a (name,
+        # rdataset) tuple as well as a proper rrset
+        if isinstance(rrset, tuple):
+            rrname = rrset[0]
+            rdataset = rrset[1]
+        else:
+            rrname = rrset.name
+            rdataset = rrset
+
+        if now is None:
+            now = time.time()
+        if rrsig.expiration < now:
+            raise ValidationFailure('expired')
+        if rrsig.inception > now:
+            raise ValidationFailure('not yet valid')
+
+        hash = _make_hash(rrsig.algorithm)
+
+        if _is_rsa(rrsig.algorithm):
+            keyptr = candidate_key.key
+            (bytes_,) = struct.unpack('!B', keyptr[0:1])
+            keyptr = keyptr[1:]
+            if bytes_ == 0:
+                (bytes_,) = struct.unpack('!H', keyptr[0:2])
+                keyptr = keyptr[2:]
+            rsa_e = keyptr[0:bytes_]
+            rsa_n = keyptr[bytes_:]
+            keylen = len(rsa_n) * 8
+            pubkey = Crypto.PublicKey.RSA.construct(
+                (Crypto.Util.number.bytes_to_long(rsa_n),
+                 Crypto.Util.number.bytes_to_long(rsa_e)))
+            sig = (Crypto.Util.number.bytes_to_long(rrsig.signature),)
+        elif _is_dsa(rrsig.algorithm):
+            keyptr = candidate_key.key
+            (t,) = struct.unpack('!B', keyptr[0:1])
+            keyptr = keyptr[1:]
+            octets = 64 + t * 8
+            dsa_q = keyptr[0:20]
+            keyptr = keyptr[20:]
+            dsa_p = keyptr[0:octets]
+            keyptr = keyptr[octets:]
+            dsa_g = keyptr[0:octets]
+            keyptr = keyptr[octets:]
+            dsa_y = keyptr[0:octets]
+            pubkey = Crypto.PublicKey.DSA.construct(
+                (Crypto.Util.number.bytes_to_long(dsa_y),
+                 Crypto.Util.number.bytes_to_long(dsa_g),
+                 Crypto.Util.number.bytes_to_long(dsa_p),
+                 Crypto.Util.number.bytes_to_long(dsa_q)))
+            (dsa_r, dsa_s) = struct.unpack('!20s20s', rrsig.signature[1:])
+            sig = (Crypto.Util.number.bytes_to_long(dsa_r),
+                   Crypto.Util.number.bytes_to_long(dsa_s))
+        elif _is_ecdsa(rrsig.algorithm):
+            if rrsig.algorithm == ECDSAP256SHA256:
+                curve = ecdsa.curves.NIST256p
+                key_len = 32
+            elif rrsig.algorithm == ECDSAP384SHA384:
+                curve = ecdsa.curves.NIST384p
+                key_len = 48
+            else:
+                # shouldn't happen
+                raise ValidationFailure('unknown ECDSA curve')
+            keyptr = candidate_key.key
+            x = Crypto.Util.number.bytes_to_long(keyptr[0:key_len])
+            y = Crypto.Util.number.bytes_to_long(keyptr[key_len:key_len * 2])
+            assert ecdsa.ecdsa.point_is_valid(curve.generator, x, y)
+            point = ecdsa.ellipticcurve.Point(curve.curve, x, y, curve.order)
+            verifying_key = ecdsa.keys.VerifyingKey.from_public_point(point,
+                                                                      curve)
+            pubkey = ECKeyWrapper(verifying_key, key_len)
+            r = rrsig.signature[:key_len]
+            s = rrsig.signature[key_len:]
+            sig = ecdsa.ecdsa.Signature(Crypto.Util.number.bytes_to_long(r),
+                                        Crypto.Util.number.bytes_to_long(s))
+        else:
+            raise ValidationFailure('unknown algorithm %u' % rrsig.algorithm)
+
+        hash.update(_to_rdata(rrsig, origin)[:18])
+        hash.update(rrsig.signer.to_digestable(origin))
+
+        if rrsig.labels < len(rrname) - 1:
+            suffix = rrname.split(rrsig.labels + 1)[1]
+            rrname = dns.name.from_text('*', suffix)
+        rrnamebuf = rrname.to_digestable(origin)
+        rrfixed = struct.pack('!HHI', rdataset.rdtype, rdataset.rdclass,
+                              rrsig.original_ttl)
+        rrlist = sorted(rdataset)
+        for rr in rrlist:
+            hash.update(rrnamebuf)
+            hash.update(rrfixed)
+            rrdata = rr.to_digestable(origin)
+            rrlen = struct.pack('!H', len(rrdata))
+            hash.update(rrlen)
+            hash.update(rrdata)
+
+        digest = hash.digest()
+
+        if _is_rsa(rrsig.algorithm):
+            # PKCS1 algorithm identifier goop
+            digest = _make_algorithm_id(rrsig.algorithm) + digest
+            padlen = keylen // 8 - len(digest) - 3
+            digest = struct.pack('!%dB' % (2 + padlen + 1),
+                                 *([0, 1] + [0xFF] * padlen + [0])) + digest
+        elif _is_dsa(rrsig.algorithm) or _is_ecdsa(rrsig.algorithm):
+            pass
+        else:
+            # Raise here for code clarity; this won't actually ever happen
+            # since if the algorithm is really unknown we'd already have
+            # raised an exception above
+            raise ValidationFailure('unknown algorithm %u' % rrsig.algorithm)
+
+        if pubkey.verify(digest, sig):
+            return
+    raise ValidationFailure('verify failure')
+
+
+def _validate(rrset, rrsigset, keys, origin=None, now=None):
+    """Validate an RRset
+
+    @param rrset: The RRset to validate
+    @type rrset: dns.rrset.RRset or (dns.name.Name, dns.rdataset.Rdataset)
+    tuple
+    @param rrsigset: The signature RRset
+    @type rrsigset: dns.rrset.RRset or (dns.name.Name, dns.rdataset.Rdataset)
+    tuple
+    @param keys: The key dictionary.
+    @type keys: a dictionary keyed by dns.name.Name with node or rdataset
+    values
+    @param origin: The origin to use for relative names
+    @type origin: dns.name.Name or None
+    @param now: The time to use when validating the signatures.  The default
+    is the current time.
+    @type now: int
+    """
+
+    if isinstance(origin, string_types):
+        origin = dns.name.from_text(origin, dns.name.root)
+
+    if isinstance(rrset, tuple):
+        rrname = rrset[0]
+    else:
+        rrname = rrset.name
+
+    if isinstance(rrsigset, tuple):
+        rrsigname = rrsigset[0]
+        rrsigrdataset = rrsigset[1]
+    else:
+        rrsigname = rrsigset.name
+        rrsigrdataset = rrsigset
+
+    rrname = rrname.choose_relativity(origin)
+    rrsigname = rrname.choose_relativity(origin)
+    if rrname != rrsigname:
+        raise ValidationFailure("owner names do not match")
+
+    for rrsig in rrsigrdataset:
+        try:
+            _validate_rrsig(rrset, rrsig, keys, origin, now)
+            return
+        except ValidationFailure:
+            pass
+    raise ValidationFailure("no RRSIGs validated")
+
+
+def _need_pycrypto(*args, **kwargs):
+    raise NotImplementedError("DNSSEC validation requires pycrypto")
+
+try:
+    import Crypto.PublicKey.RSA
+    import Crypto.PublicKey.DSA
+    import Crypto.Util.number
+    validate = _validate
+    validate_rrsig = _validate_rrsig
+    _have_pycrypto = True
+except ImportError:
+    validate = _need_pycrypto
+    validate_rrsig = _need_pycrypto
+    _have_pycrypto = False
+
+try:
+    import ecdsa
+    import ecdsa.ecdsa
+    import ecdsa.ellipticcurve
+    import ecdsa.keys
+    _have_ecdsa = True
+
+    class ECKeyWrapper(object):
+
+        def __init__(self, key, key_len):
+            self.key = key
+            self.key_len = key_len
+
+        def verify(self, digest, sig):
+            diglong = Crypto.Util.number.bytes_to_long(digest)
+            return self.key.pubkey.verifies(diglong, sig)
+
+except ImportError:
+    _have_ecdsa = False

eventlet/support/dns/e164.py

@@ -0,0 +1,85 @@
+# Copyright (C) 2006, 2007, 2009, 2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""DNS E.164 helpers
+
+@var public_enum_domain: The DNS public ENUM domain, e164.arpa.
+@type public_enum_domain: dns.name.Name object
+"""
+
+
+import dns.exception
+import dns.name
+import dns.resolver
+from ._compat import string_types
+
+public_enum_domain = dns.name.from_text('e164.arpa.')
+
+
+def from_e164(text, origin=public_enum_domain):
+    """Convert an E.164 number in textual form into a Name object whose
+    value is the ENUM domain name for that number.
+    @param text: an E.164 number in textual form.
+    @type text: str
+    @param origin: The domain in which the number should be constructed.
+    The default is e164.arpa.
+    @type origin: dns.name.Name object or None
+    @rtype: dns.name.Name object
+    """
+    parts = [d for d in text if d.isdigit()]
+    parts.reverse()
+    return dns.name.from_text('.'.join(parts), origin=origin)
+
+
+def to_e164(name, origin=public_enum_domain, want_plus_prefix=True):
+    """Convert an ENUM domain name into an E.164 number.
+    @param name: the ENUM domain name.
+    @type name: dns.name.Name object.
+    @param origin: A domain containing the ENUM domain name.  The
+    name is relativized to this domain before being converted to text.
+    @type origin: dns.name.Name object or None
+    @param want_plus_prefix: if True, add a '+' to the beginning of the
+    returned number.
+    @rtype: str
+    """
+    if origin is not None:
+        name = name.relativize(origin)
+    dlabels = [d for d in name.labels if d.isdigit() and len(d) == 1]
+    if len(dlabels) != len(name.labels):
+        raise dns.exception.SyntaxError('non-digit labels in ENUM domain name')
+    dlabels.reverse()
+    text = b''.join(dlabels)
+    if want_plus_prefix:
+        text = b'+' + text
+    return text
+
+
+def query(number, domains, resolver=None):
+    """Look for NAPTR RRs for the specified number in the specified domains.
+
+    e.g. lookup('16505551212', ['e164.dnspython.org.', 'e164.arpa.'])
+    """
+    if resolver is None:
+        resolver = dns.resolver.get_default_resolver()
+    e_nx = dns.resolver.NXDOMAIN()
+    for domain in domains:
+        if isinstance(domain, string_types):
+            domain = dns.name.from_text(domain)
+        qname = dns.e164.from_e164(number, domain)
+        try:
+            return resolver.query(qname, 'NAPTR')
+        except dns.resolver.NXDOMAIN as e:
+            e_nx += e
+    raise e_nx

eventlet/support/dns/edns.py

@@ -0,0 +1,150 @@
+# Copyright (C) 2009, 2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""EDNS Options"""
+
+NSID = 3
+
+
+class Option(object):
+
+    """Base class for all EDNS option types.
+    """
+
+    def __init__(self, otype):
+        """Initialize an option.
+        @param otype: The rdata type
+        @type otype: int
+        """
+        self.otype = otype
+
+    def to_wire(self, file):
+        """Convert an option to wire format.
+        """
+        raise NotImplementedError
+
+    @classmethod
+    def from_wire(cls, otype, wire, current, olen):
+        """Build an EDNS option object from wire format
+
+        @param otype: The option type
+        @type otype: int
+        @param wire: The wire-format message
+        @type wire: string
+        @param current: The offset in wire of the beginning of the rdata.
+        @type current: int
+        @param olen: The length of the wire-format option data
+        @type olen: int
+        @rtype: dns.edns.Option instance"""
+        raise NotImplementedError
+
+    def _cmp(self, other):
+        """Compare an EDNS option with another option of the same type.
+        Return < 0 if self < other, 0 if self == other,
+        and > 0 if self > other.
+        """
+        raise NotImplementedError
+
+    def __eq__(self, other):
+        if not isinstance(other, Option):
+            return False
+        if self.otype != other.otype:
+            return False
+        return self._cmp(other) == 0
+
+    def __ne__(self, other):
+        if not isinstance(other, Option):
+            return False
+        if self.otype != other.otype:
+            return False
+        return self._cmp(other) != 0
+
+    def __lt__(self, other):
+        if not isinstance(other, Option) or \
+                self.otype != other.otype:
+            return NotImplemented
+        return self._cmp(other) < 0
+
+    def __le__(self, other):
+        if not isinstance(other, Option) or \
+                self.otype != other.otype:
+            return NotImplemented
+        return self._cmp(other) <= 0
+
+    def __ge__(self, other):
+        if not isinstance(other, Option) or \
+                self.otype != other.otype:
+            return NotImplemented
+        return self._cmp(other) >= 0
+
+    def __gt__(self, other):
+        if not isinstance(other, Option) or \
+                self.otype != other.otype:
+            return NotImplemented
+        return self._cmp(other) > 0
+
+
+class GenericOption(Option):
+
+    """Generate Rdata Class
+
+    This class is used for EDNS option types for which we have no better
+    implementation.
+    """
+
+    def __init__(self, otype, data):
+        super(GenericOption, self).__init__(otype)
+        self.data = data
+
+    def to_wire(self, file):
+        file.write(self.data)
+
+    @classmethod
+    def from_wire(cls, otype, wire, current, olen):
+        return cls(otype, wire[current: current + olen])
+
+    def _cmp(self, other):
+        if self.data == other.data:
+            return 0
+        if self.data > other.data:
+            return 1
+        return -1
+
+_type_to_class = {
+}
+
+
+def get_option_class(otype):
+    cls = _type_to_class.get(otype)
+    if cls is None:
+        cls = GenericOption
+    return cls
+
+
+def option_from_wire(otype, wire, current, olen):
+    """Build an EDNS option object from wire format
+
+    @param otype: The option type
+    @type otype: int
+    @param wire: The wire-format message
+    @type wire: string
+    @param current: The offset in wire of the beginning of the rdata.
+    @type current: int
+    @param olen: The length of the wire-format option data
+    @type olen: int
+    @rtype: dns.edns.Option instance"""
+
+    cls = get_option_class(otype)
+    return cls.from_wire(otype, wire, current, olen)

eventlet/support/dns/entropy.py

@@ -0,0 +1,141 @@
+# Copyright (C) 2009, 2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import os
+import random
+import time
+from ._compat import long, binary_type
+try:
+    import threading as _threading
+except ImportError:
+    import dummy_threading as _threading
+
+
+class EntropyPool(object):
+
+    def __init__(self, seed=None):
+        self.pool_index = 0
+        self.digest = None
+        self.next_byte = 0
+        self.lock = _threading.Lock()
+        try:
+            import hashlib
+            self.hash = hashlib.sha1()
+            self.hash_len = 20
+        except ImportError:
+            try:
+                import sha
+                self.hash = sha.new()
+                self.hash_len = 20
+            except ImportError:
+                import md5  # pylint: disable=import-error
+                self.hash = md5.new()
+                self.hash_len = 16
+        self.pool = bytearray(b'\0' * self.hash_len)
+        if seed is not None:
+            self.stir(bytearray(seed))
+            self.seeded = True
+            self.seed_pid = os.getpid()
+        else:
+            self.seeded = False
+            self.seed_pid = 0
+
+    def stir(self, entropy, already_locked=False):
+        if not already_locked:
+            self.lock.acquire()
+        try:
+            for c in entropy:
+                if self.pool_index == self.hash_len:
+                    self.pool_index = 0
+                b = c & 0xff
+                self.pool[self.pool_index] ^= b
+                self.pool_index += 1
+        finally:
+            if not already_locked:
+                self.lock.release()
+
+    def _maybe_seed(self):
+        if not self.seeded or self.seed_pid != os.getpid():
+            try:
+                seed = os.urandom(16)
+            except:
+                try:
+                    r = open('/dev/urandom', 'rb', 0)
+                    try:
+                        seed = r.read(16)
+                    finally:
+                        r.close()
+                except:
+                    seed = str(time.time())
+            self.seeded = True
+            self.seed_pid = os.getpid()
+            self.digest = None
+            seed = bytearray(seed)
+            self.stir(seed, True)
+
+    def random_8(self):
+        self.lock.acquire()
+        try:
+            self._maybe_seed()
+            if self.digest is None or self.next_byte == self.hash_len:
+                self.hash.update(binary_type(self.pool))
+                self.digest = bytearray(self.hash.digest())
+                self.stir(self.digest, True)
+                self.next_byte = 0
+            value = self.digest[self.next_byte]
+            self.next_byte += 1
+        finally:
+            self.lock.release()
+        return value
+
+    def random_16(self):
+        return self.random_8() * 256 + self.random_8()
+
+    def random_32(self):
+        return self.random_16() * 65536 + self.random_16()
+
+    def random_between(self, first, last):
+        size = last - first + 1
+        if size > long(4294967296):
+            raise ValueError('too big')
+        if size > 65536:
+            rand = self.random_32
+            max = long(4294967295)
+        elif size > 256:
+            rand = self.random_16
+            max = 65535
+        else:
+            rand = self.random_8
+            max = 255
+        return first + size * rand() // (max + 1)
+
+pool = EntropyPool()
+
+try:
+    system_random = random.SystemRandom()
+except:
+    system_random = None
+
+def random_16():
+    if system_random is not None:
+        return system_random.randrange(0, 65536)
+    else:
+        return pool.random_16()
+
+def between(first, last):
+    if system_random is not None:
+        return system_random.randrange(first, last + 1)
+    else:
+        return pool.random_between(first, last)

eventlet/support/dns/exception.py

@@ -0,0 +1,128 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""Common DNS Exceptions."""
+
+
+class DNSException(Exception):
+
+    """Abstract base class shared by all dnspython exceptions.
+
+    It supports two basic modes of operation:
+
+    a) Old/compatible mode is used if __init__ was called with
+       empty **kwargs.
+    In compatible mode all *args are passed to standard Python Exception class
+    as before and all *args are printed by standard __str__ implementation.
+    Class variable msg (or doc string if msg is None) is returned from str()
+    if *args is empty.
+
+    b) New/parametrized mode is used if __init__ was called with
+       non-empty **kwargs.
+    In the new mode *args has to be empty and all kwargs has to exactly match
+    set in class variable self.supp_kwargs. All kwargs are stored inside
+    self.kwargs and used in new __str__ implementation to construct
+    formatted message based on self.fmt string.
+
+    In the simplest case it is enough to override supp_kwargs and fmt
+    class variables to get nice parametrized messages.
+    """
+    msg = None  # non-parametrized message
+    supp_kwargs = set()  # accepted parameters for _fmt_kwargs (sanity check)
+    fmt = None  # message parametrized with results from _fmt_kwargs
+
+    def __init__(self, *args, **kwargs):
+        self._check_params(*args, **kwargs)
+        if kwargs:
+            self.kwargs = self._check_kwargs(**kwargs)
+            self.msg = str(self)
+        else:
+            self.kwargs = dict()  # defined but empty for old mode exceptions
+        if self.msg is None:
+            # doc string is better implicit message than empty string
+            self.msg = self.__doc__
+        if args:
+            super(DNSException, self).__init__(*args)
+        else:
+            super(DNSException, self).__init__(self.msg)
+
+    def _check_params(self, *args, **kwargs):
+        """Old exceptions supported only args and not kwargs.
+
+        For sanity we do not allow to mix old and new behavior."""
+        if args or kwargs:
+            assert bool(args) != bool(kwargs), \
+                'keyword arguments are mutually exclusive with positional args'
+
+    def _check_kwargs(self, **kwargs):
+        if kwargs:
+            assert set(kwargs.keys()) == self.supp_kwargs, \
+                'following set of keyword args is required: %s' % (
+                    self.supp_kwargs)
+        return kwargs
+
+    def _fmt_kwargs(self, **kwargs):
+        """Format kwargs before printing them.
+
+        Resulting dictionary has to have keys necessary for str.format call
+        on fmt class variable.
+        """
+        fmtargs = {}
+        for kw, data in kwargs.items():
+            if isinstance(data, (list, set)):
+                # convert list of <someobj> to list of str(<someobj>)
+                fmtargs[kw] = list(map(str, data))
+                if len(fmtargs[kw]) == 1:
+                    # remove list brackets [] from single-item lists
+                    fmtargs[kw] = fmtargs[kw].pop()
+            else:
+                fmtargs[kw] = data
+        return fmtargs
+
+    def __str__(self):
+        if self.kwargs and self.fmt:
+            # provide custom message constructed from keyword arguments
+            fmtargs = self._fmt_kwargs(**self.kwargs)
+            return self.fmt.format(**fmtargs)
+        else:
+            # print *args directly in the same way as old DNSException
+            return super(DNSException, self).__str__()
+
+
+class FormError(DNSException):
+
+    """DNS message is malformed."""
+
+
+class SyntaxError(DNSException):
+
+    """Text input is malformed."""
+
+
+class UnexpectedEnd(SyntaxError):
+
+    """Text input ended unexpectedly."""
+
+
+class TooBig(DNSException):
+
+    """The DNS message is too big."""
+
+
+class Timeout(DNSException):
+
+    """The DNS operation timed out."""
+    supp_kwargs = set(['timeout'])
+    fmt = "The DNS operation timed out after {timeout} seconds"

eventlet/support/dns/flags.py

@@ -0,0 +1,112 @@
+# Copyright (C) 2001-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""DNS Message Flags."""
+
+# Standard DNS flags
+
+QR = 0x8000
+AA = 0x0400
+TC = 0x0200
+RD = 0x0100
+RA = 0x0080
+AD = 0x0020
+CD = 0x0010
+
+# EDNS flags
+
+DO = 0x8000
+
+_by_text = {
+    'QR': QR,
+    'AA': AA,
+    'TC': TC,
+    'RD': RD,
+    'RA': RA,
+    'AD': AD,
+    'CD': CD
+}
+
+_edns_by_text = {
+    'DO': DO
+}
+
+
+# We construct the inverse mappings programmatically to ensure that we
+# cannot make any mistakes (e.g. omissions, cut-and-paste errors) that
+# would cause the mappings not to be true inverses.
+
+_by_value = dict((y, x) for x, y in _by_text.items())
+
+_edns_by_value = dict((y, x) for x, y in _edns_by_text.items())
+
+
+def _order_flags(table):
+    order = list(table.items())
+    order.sort()
+    order.reverse()
+    return order
+
+_flags_order = _order_flags(_by_value)
+
+_edns_flags_order = _order_flags(_edns_by_value)
+
+
+def _from_text(text, table):
+    flags = 0
+    tokens = text.split()
+    for t in tokens:
+        flags = flags | table[t.upper()]
+    return flags
+
+
+def _to_text(flags, table, order):
+    text_flags = []
+    for k, v in order:
+        if flags & k != 0:
+            text_flags.append(v)
+    return ' '.join(text_flags)
+
+
+def from_text(text):
+    """Convert a space-separated list of flag text values into a flags
+    value.
+    @rtype: int"""
+
+    return _from_text(text, _by_text)
+
+
+def to_text(flags):
+    """Convert a flags value into a space-separated list of flag text
+    values.
+    @rtype: string"""
+
+    return _to_text(flags, _by_value, _flags_order)
+
+
+def edns_from_text(text):
+    """Convert a space-separated list of EDNS flag text values into a EDNS
+    flags value.
+    @rtype: int"""
+
+    return _from_text(text, _edns_by_text)
+
+
+def edns_to_text(flags):
+    """Convert an EDNS flags value into a space-separated list of EDNS flag
+    text values.
+    @rtype: string"""
+
+    return _to_text(flags, _edns_by_value, _edns_flags_order)

eventlet/support/dns/grange.py

@@ -0,0 +1,69 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""DNS GENERATE range conversion."""
+
+import dns
+
+
+def from_text(text):
+    """Convert the text form of a range in a GENERATE statement to an
+    integer.
+
+    @param text: the textual range
+    @type text: string
+    @return: The start, stop and step values.
+    @rtype: tuple
+    """
+    # TODO, figure out the bounds on start, stop and step.
+
+    step = 1
+    cur = ''
+    state = 0
+    # state   0 1 2 3 4
+    #         x - y / z
+
+    if text and text[0] == '-':
+        raise dns.exception.SyntaxError("Start cannot be a negative number")
+
+    for c in text:
+        if c == '-' and state == 0:
+            start = int(cur)
+            cur = ''
+            state = 2
+        elif c == '/':
+            stop = int(cur)
+            cur = ''
+            state = 4
+        elif c.isdigit():
+            cur += c
+        else:
+            raise dns.exception.SyntaxError("Could not parse %s" % (c))
+
+    if state in (1, 3):
+        raise dns.exception.SyntaxError()
+
+    if state == 2:
+        stop = int(cur)
+
+    if state == 4:
+        step = int(cur)
+
+    assert step >= 1
+    assert start >= 0
+    assert start <= stop
+    # TODO, can start == stop?
+
+    return (start, stop, step)

eventlet/support/dns/hash.py

@@ -0,0 +1,31 @@
+# Copyright (C) 2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""Hashing backwards compatibility wrapper"""
+
+import hashlib
+
+
+hashes = {}
+hashes['MD5'] = hashlib.md5
+hashes['SHA1'] = hashlib.sha1
+hashes['SHA224'] = hashlib.sha224
+hashes['SHA256'] = hashlib.sha256
+hashes['SHA384'] = hashlib.sha384
+hashes['SHA512'] = hashlib.sha512
+
+
+def get(algorithm):
+    return hashes[algorithm.upper()]

eventlet/support/dns/inet.py

@@ -0,0 +1,111 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""Generic Internet address helper functions."""
+
+import socket
+
+import dns.ipv4
+import dns.ipv6
+
+
+# We assume that AF_INET is always defined.
+
+AF_INET = socket.AF_INET
+
+# AF_INET6 might not be defined in the socket module, but we need it.
+# We'll try to use the socket module's value, and if it doesn't work,
+# we'll use our own value.
+
+try:
+    AF_INET6 = socket.AF_INET6
+except AttributeError:
+    AF_INET6 = 9999
+
+
+def inet_pton(family, text):
+    """Convert the textual form of a network address into its binary form.
+
+    @param family: the address family
+    @type family: int
+    @param text: the textual address
+    @type text: string
+    @raises NotImplementedError: the address family specified is not
+    implemented.
+    @rtype: string
+    """
+
+    if family == AF_INET:
+        return dns.ipv4.inet_aton(text)
+    elif family == AF_INET6:
+        return dns.ipv6.inet_aton(text)
+    else:
+        raise NotImplementedError
+
+
+def inet_ntop(family, address):
+    """Convert the binary form of a network address into its textual form.
+
+    @param family: the address family
+    @type family: int
+    @param address: the binary address
+    @type address: string
+    @raises NotImplementedError: the address family specified is not
+    implemented.
+    @rtype: string
+    """
+    if family == AF_INET:
+        return dns.ipv4.inet_ntoa(address)
+    elif family == AF_INET6:
+        return dns.ipv6.inet_ntoa(address)
+    else:
+        raise NotImplementedError
+
+
+def af_for_address(text):
+    """Determine the address family of a textual-form network address.
+
+    @param text: the textual address
+    @type text: string
+    @raises ValueError: the address family cannot be determined from the input.
+    @rtype: int
+    """
+    try:
+        dns.ipv4.inet_aton(text)
+        return AF_INET
+    except:
+        try:
+            dns.ipv6.inet_aton(text)
+            return AF_INET6
+        except:
+            raise ValueError
+
+
+def is_multicast(text):
+    """Is the textual-form network address a multicast address?
+
+    @param text: the textual address
+    @raises ValueError: the address family cannot be determined from the input.
+    @rtype: bool
+    """
+    try:
+        first = ord(dns.ipv4.inet_aton(text)[0])
+        return first >= 224 and first <= 239
+    except:
+        try:
+            first = ord(dns.ipv6.inet_aton(text)[0])
+            return first == 255
+        except:
+            raise ValueError

eventlet/support/dns/ipv4.py

@@ -0,0 +1,59 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""IPv4 helper functions."""
+
+import struct
+
+import dns.exception
+from ._compat import binary_type
+
+def inet_ntoa(address):
+    """Convert an IPv4 address in network form to text form.
+
+    @param address: The IPv4 address
+    @type address: string
+    @returns: string
+    """
+    if len(address) != 4:
+        raise dns.exception.SyntaxError
+    if not isinstance(address, bytearray):
+        address = bytearray(address)
+    return (u'%u.%u.%u.%u' % (address[0], address[1],
+                              address[2], address[3])).encode()
+
+def inet_aton(text):
+    """Convert an IPv4 address in text form to network form.
+
+    @param text: The IPv4 address
+    @type text: string
+    @returns: string
+    """
+    if not isinstance(text, binary_type):
+        text = text.encode()
+    parts = text.split(b'.')
+    if len(parts) != 4:
+        raise dns.exception.SyntaxError
+    for part in parts:
+        if not part.isdigit():
+            raise dns.exception.SyntaxError
+        if len(part) > 1 and part[0] == '0':
+            # No leading zeros
+            raise dns.exception.SyntaxError
+    try:
+        bytes = [int(part) for part in parts]
+        return struct.pack('BBBB', *bytes)
+    except:
+        raise dns.exception.SyntaxError

eventlet/support/dns/ipv6.py

@@ -0,0 +1,172 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""IPv6 helper functions."""
+
+import re
+import binascii
+
+import dns.exception
+import dns.ipv4
+from ._compat import xrange, binary_type, maybe_decode
+
+_leading_zero = re.compile(b'0+([0-9a-f]+)')
+
+def inet_ntoa(address):
+    """Convert a network format IPv6 address into text.
+
+    @param address: the binary address
+    @type address: string
+    @rtype: string
+    @raises ValueError: the address isn't 16 bytes long
+    """
+
+    if len(address) != 16:
+        raise ValueError("IPv6 addresses are 16 bytes long")
+    hex = binascii.hexlify(address)
+    chunks = []
+    i = 0
+    l = len(hex)
+    while i < l:
+        chunk = hex[i : i + 4]
+        # strip leading zeros.  we do this with an re instead of
+        # with lstrip() because lstrip() didn't support chars until
+        # python 2.2.2
+        m = _leading_zero.match(chunk)
+        if not m is None:
+            chunk = m.group(1)
+        chunks.append(chunk)
+        i += 4
+    #
+    # Compress the longest subsequence of 0-value chunks to ::
+    #
+    best_start = 0
+    best_len = 0
+    start = -1
+    last_was_zero = False
+    for i in xrange(8):
+        if chunks[i] != b'0':
+            if last_was_zero:
+                end = i
+                current_len = end - start
+                if current_len > best_len:
+                    best_start = start
+                    best_len = current_len
+                last_was_zero = False
+        elif not last_was_zero:
+            start = i
+            last_was_zero = True
+    if last_was_zero:
+        end = 8
+        current_len = end - start
+        if current_len > best_len:
+            best_start = start
+            best_len = current_len
+    if best_len > 1:
+        if best_start == 0 and \
+           (best_len == 6 or
+            best_len == 5 and chunks[5] == b'ffff'):
+            # We have an embedded IPv4 address
+            if best_len == 6:
+                prefix = b'::'
+            else:
+                prefix = b'::ffff:'
+            hex = prefix + dns.ipv4.inet_ntoa(address[12:])
+        else:
+            hex = b':'.join(chunks[:best_start]) + b'::' + \
+                  b':'.join(chunks[best_start + best_len:])
+    else:
+        hex = b':'.join(chunks)
+    return maybe_decode(hex)
+
+_v4_ending = re.compile(b'(.*):(\d+\.\d+\.\d+\.\d+)$')
+_colon_colon_start = re.compile(b'::.*')
+_colon_colon_end = re.compile(b'.*::$')
+
+def inet_aton(text):
+    """Convert a text format IPv6 address into network format.
+
+    @param text: the textual address
+    @type text: string
+    @rtype: string
+    @raises dns.exception.SyntaxError: the text was not properly formatted
+    """
+
+    #
+    # Our aim here is not something fast; we just want something that works.
+    #
+    if not isinstance(text, binary_type):
+        text = text.encode()
+
+    if text == b'::':
+        text = b'0::'
+    #
+    # Get rid of the icky dot-quad syntax if we have it.
+    #
+    m = _v4_ending.match(text)
+    if not m is None:
+        b = bytearray(dns.ipv4.inet_aton(m.group(2)))
+        text = (u"%s:%02x%02x:%02x%02x" % (m.group(1).decode(), b[0], b[1],
+                                           b[2], b[3])).encode()
+    #
+    # Try to turn '::<whatever>' into ':<whatever>'; if no match try to
+    # turn '<whatever>::' into '<whatever>:'
+    #
+    m = _colon_colon_start.match(text)
+    if not m is None:
+        text = text[1:]
+    else:
+        m = _colon_colon_end.match(text)
+        if not m is None:
+            text = text[:-1]
+    #
+    # Now canonicalize into 8 chunks of 4 hex digits each
+    #
+    chunks = text.split(b':')
+    l = len(chunks)
+    if l > 8:
+        raise dns.exception.SyntaxError
+    seen_empty = False
+    canonical = []
+    for c in chunks:
+        if c == b'':
+            if seen_empty:
+                raise dns.exception.SyntaxError
+            seen_empty = True
+            for i in xrange(0, 8 - l + 1):
+                canonical.append(b'0000')
+        else:
+            lc = len(c)
+            if lc > 4:
+                raise dns.exception.SyntaxError
+            if lc != 4:
+                c = (b'0' * (4 - lc)) + c
+            canonical.append(c)
+    if l < 8 and not seen_empty:
+        raise dns.exception.SyntaxError
+    text = b''.join(canonical)
+
+    #
+    # Finally we can go to binary.
+    #
+    try:
+        return binascii.unhexlify(text)
+    except (binascii.Error, TypeError):
+        raise dns.exception.SyntaxError
+
+_mapped_prefix = b'\x00' * 10 + b'\xff\xff'
+
+def is_mapped(address):
+    return address.startswith(_mapped_prefix)

eventlet/support/dns/name.py

@@ -0,0 +1,762 @@
+# Copyright (C) 2001-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""DNS Names.
+
+@var root: The DNS root name.
+@type root: dns.name.Name object
+@var empty: The empty DNS name.
+@type empty: dns.name.Name object
+"""
+
+from io import BytesIO
+import struct
+import sys
+import copy
+import encodings.idna
+
+import dns.exception
+import dns.wiredata
+
+from ._compat import long, binary_type, text_type, unichr
+
+try:
+    maxint = sys.maxint
+except:
+    maxint = (1 << (8 * struct.calcsize("P"))) // 2 - 1
+
+NAMERELN_NONE = 0
+NAMERELN_SUPERDOMAIN = 1
+NAMERELN_SUBDOMAIN = 2
+NAMERELN_EQUAL = 3
+NAMERELN_COMMONANCESTOR = 4
+
+
+class EmptyLabel(dns.exception.SyntaxError):
+
+    """A DNS label is empty."""
+
+
+class BadEscape(dns.exception.SyntaxError):
+
+    """An escaped code in a text format of DNS name is invalid."""
+
+
+class BadPointer(dns.exception.FormError):
+
+    """A DNS compression pointer points forward instead of backward."""
+
+
+class BadLabelType(dns.exception.FormError):
+
+    """The label type in DNS name wire format is unknown."""
+
+
+class NeedAbsoluteNameOrOrigin(dns.exception.DNSException):
+
+    """An attempt was made to convert a non-absolute name to
+    wire when there was also a non-absolute (or missing) origin."""
+
+
+class NameTooLong(dns.exception.FormError):
+
+    """A DNS name is > 255 octets long."""
+
+
+class LabelTooLong(dns.exception.SyntaxError):
+
+    """A DNS label is > 63 octets long."""
+
+
+class AbsoluteConcatenation(dns.exception.DNSException):
+
+    """An attempt was made to append anything other than the
+    empty name to an absolute DNS name."""
+
+
+class NoParent(dns.exception.DNSException):
+
+    """An attempt was made to get the parent of the root name
+    or the empty name."""
+
+_escaped = bytearray(b'"().;\\@$')
+
+
+def _escapify(label, unicode_mode=False):
+    """Escape the characters in label which need it.
+    @param unicode_mode: escapify only special and whitespace (<= 0x20)
+    characters
+    @returns: the escaped string
+    @rtype: string"""
+    if not unicode_mode:
+        text = ''
+        if isinstance(label, text_type):
+            label = label.encode()
+        for c in bytearray(label):
+            if c in _escaped:
+                text += '\\' + chr(c)
+            elif c > 0x20 and c < 0x7F:
+                text += chr(c)
+            else:
+                text += '\\%03d' % c
+        return text.encode()
+
+    text = u''
+    if isinstance(label, binary_type):
+        label = label.decode()
+    for c in label:
+        if c > u'\x20' and c < u'\x7f':
+            text += c
+        else:
+            if c >= u'\x7f':
+                text += c
+            else:
+                text += u'\\%03d' % ord(c)
+    return text
+
+
+def _validate_labels(labels):
+    """Check for empty labels in the middle of a label sequence,
+    labels that are too long, and for too many labels.
+    @raises NameTooLong: the name as a whole is too long
+    @raises EmptyLabel: a label is empty (i.e. the root label) and appears
+    in a position other than the end of the label sequence"""
+
+    l = len(labels)
+    total = 0
+    i = -1
+    j = 0
+    for label in labels:
+        ll = len(label)
+        total += ll + 1
+        if ll > 63:
+            raise LabelTooLong
+        if i < 0 and label == b'':
+            i = j
+        j += 1
+    if total > 255:
+        raise NameTooLong
+    if i >= 0 and i != l - 1:
+        raise EmptyLabel
+
+
+def _ensure_bytes(label):
+    if isinstance(label, binary_type):
+        return label
+    if isinstance(label, text_type):
+        return label.encode()
+    raise ValueError
+
+
+class Name(object):
+
+    """A DNS name.
+
+    The dns.name.Name class represents a DNS name as a tuple of labels.
+    Instances of the class are immutable.
+
+    @ivar labels: The tuple of labels in the name. Each label is a string of
+    up to 63 octets."""
+
+    __slots__ = ['labels']
+
+    def __init__(self, labels):
+        """Initialize a domain name from a list of labels.
+        @param labels: the labels
+        @type labels: any iterable whose values are strings
+        """
+        labels = [_ensure_bytes(x) for x in labels]
+        super(Name, self).__setattr__('labels', tuple(labels))
+        _validate_labels(self.labels)
+
+    def __setattr__(self, name, value):
+        raise TypeError("object doesn't support attribute assignment")
+
+    def __copy__(self):
+        return Name(self.labels)
+
+    def __deepcopy__(self, memo):
+        return Name(copy.deepcopy(self.labels, memo))
+
+    def __getstate__(self):
+        return {'labels': self.labels}
+
+    def __setstate__(self, state):
+        super(Name, self).__setattr__('labels', state['labels'])
+        _validate_labels(self.labels)
+
+    def is_absolute(self):
+        """Is the most significant label of this name the root label?
+        @rtype: bool
+        """
+
+        return len(self.labels) > 0 and self.labels[-1] == b''
+
+    def is_wild(self):
+        """Is this name wild?  (I.e. Is the least significant label '*'?)
+        @rtype: bool
+        """
+
+        return len(self.labels) > 0 and self.labels[0] == b'*'
+
+    def __hash__(self):
+        """Return a case-insensitive hash of the name.
+        @rtype: int
+        """
+
+        h = long(0)
+        for label in self.labels:
+            for c in bytearray(label.lower()):
+                h += (h << 3) + c
+        return int(h % maxint)
+
+    def fullcompare(self, other):
+        """Compare two names, returning a 3-tuple (relation, order, nlabels).
+
+        I{relation} describes the relation ship between the names,
+        and is one of: dns.name.NAMERELN_NONE,
+        dns.name.NAMERELN_SUPERDOMAIN, dns.name.NAMERELN_SUBDOMAIN,
+        dns.name.NAMERELN_EQUAL, or dns.name.NAMERELN_COMMONANCESTOR
+
+        I{order} is < 0 if self < other, > 0 if self > other, and ==
+        0 if self == other.  A relative name is always less than an
+        absolute name.  If both names have the same relativity, then
+        the DNSSEC order relation is used to order them.
+
+        I{nlabels} is the number of significant labels that the two names
+        have in common.
+        """
+
+        sabs = self.is_absolute()
+        oabs = other.is_absolute()
+        if sabs != oabs:
+            if sabs:
+                return (NAMERELN_NONE, 1, 0)
+            else:
+                return (NAMERELN_NONE, -1, 0)
+        l1 = len(self.labels)
+        l2 = len(other.labels)
+        ldiff = l1 - l2
+        if ldiff < 0:
+            l = l1
+        else:
+            l = l2
+
+        order = 0
+        nlabels = 0
+        namereln = NAMERELN_NONE
+        while l > 0:
+            l -= 1
+            l1 -= 1
+            l2 -= 1
+            label1 = self.labels[l1].lower()
+            label2 = other.labels[l2].lower()
+            if label1 < label2:
+                order = -1
+                if nlabels > 0:
+                    namereln = NAMERELN_COMMONANCESTOR
+                return (namereln, order, nlabels)
+            elif label1 > label2:
+                order = 1
+                if nlabels > 0:
+                    namereln = NAMERELN_COMMONANCESTOR
+                return (namereln, order, nlabels)
+            nlabels += 1
+        order = ldiff
+        if ldiff < 0:
+            namereln = NAMERELN_SUPERDOMAIN
+        elif ldiff > 0:
+            namereln = NAMERELN_SUBDOMAIN
+        else:
+            namereln = NAMERELN_EQUAL
+        return (namereln, order, nlabels)
+
+    def is_subdomain(self, other):
+        """Is self a subdomain of other?
+
+        The notion of subdomain includes equality.
+        @rtype: bool
+        """
+
+        (nr, o, nl) = self.fullcompare(other)
+        if nr == NAMERELN_SUBDOMAIN or nr == NAMERELN_EQUAL:
+            return True
+        return False
+
+    def is_superdomain(self, other):
+        """Is self a superdomain of other?
+
+        The notion of subdomain includes equality.
+        @rtype: bool
+        """
+
+        (nr, o, nl) = self.fullcompare(other)
+        if nr == NAMERELN_SUPERDOMAIN or nr == NAMERELN_EQUAL:
+            return True
+        return False
+
+    def canonicalize(self):
+        """Return a name which is equal to the current name, but is in
+        DNSSEC canonical form.
+        @rtype: dns.name.Name object
+        """
+
+        return Name([x.lower() for x in self.labels])
+
+    def __eq__(self, other):
+        if isinstance(other, Name):
+            return self.fullcompare(other)[1] == 0
+        else:
+            return False
+
+    def __ne__(self, other):
+        if isinstance(other, Name):
+            return self.fullcompare(other)[1] != 0
+        else:
+            return True
+
+    def __lt__(self, other):
+        if isinstance(other, Name):
+            return self.fullcompare(other)[1] < 0
+        else:
+            return NotImplemented
+
+    def __le__(self, other):
+        if isinstance(other, Name):
+            return self.fullcompare(other)[1] <= 0
+        else:
+            return NotImplemented
+
+    def __ge__(self, other):
+        if isinstance(other, Name):
+            return self.fullcompare(other)[1] >= 0
+        else:
+            return NotImplemented
+
+    def __gt__(self, other):
+        if isinstance(other, Name):
+            return self.fullcompare(other)[1] > 0
+        else:
+            return NotImplemented
+
+    def __repr__(self):
+        return '<DNS name ' + self.__str__() + '>'
+
+    def __str__(self):
+        return self.to_text(False).decode()
+
+    def to_text(self, omit_final_dot=False):
+        """Convert name to text format.
+        @param omit_final_dot: If True, don't emit the final dot (denoting the
+        root label) for absolute names.  The default is False.
+        @rtype: string
+        """
+
+        if len(self.labels) == 0:
+            return b'@'
+        if len(self.labels) == 1 and self.labels[0] == b'':
+            return b'.'
+        if omit_final_dot and self.is_absolute():
+            l = self.labels[:-1]
+        else:
+            l = self.labels
+        s = b'.'.join(map(_escapify, l))
+        return s
+
+    def to_unicode(self, omit_final_dot=False):
+        """Convert name to Unicode text format.
+
+        IDN ACE labels are converted to Unicode.
+
+        @param omit_final_dot: If True, don't emit the final dot (denoting the
+        root label) for absolute names.  The default is False.
+        @rtype: string
+        """
+
+        if len(self.labels) == 0:
+            return u'@'
+        if len(self.labels) == 1 and self.labels[0] == b'':
+            return u'.'
+        if omit_final_dot and self.is_absolute():
+            l = self.labels[:-1]
+        else:
+            l = self.labels
+        s = u'.'.join([_escapify(encodings.idna.ToUnicode(x), True)
+                      for x in l])
+        return s
+
+    def to_digestable(self, origin=None):
+        """Convert name to a format suitable for digesting in hashes.
+
+        The name is canonicalized and converted to uncompressed wire format.
+
+        @param origin: If the name is relative and origin is not None, then
+        origin will be appended to it.
+        @type origin: dns.name.Name object
+        @raises NeedAbsoluteNameOrOrigin: All names in wire format are
+        absolute.  If self is a relative name, then an origin must be supplied;
+        if it is missing, then this exception is raised
+        @rtype: string
+        """
+
+        if not self.is_absolute():
+            if origin is None or not origin.is_absolute():
+                raise NeedAbsoluteNameOrOrigin
+            labels = list(self.labels)
+            labels.extend(list(origin.labels))
+        else:
+            labels = self.labels
+        dlabels = [struct.pack('!B%ds' % len(x), len(x), x.lower())
+                   for x in labels]
+        return b''.join(dlabels)
+
+    def to_wire(self, file=None, compress=None, origin=None):
+        """Convert name to wire format, possibly compressing it.
+
+        @param file: the file where the name is emitted (typically
+        a BytesIO file).  If None, a string containing the wire name
+        will be returned.
+        @type file: file or None
+        @param compress: The compression table.  If None (the default) names
+        will not be compressed.
+        @type compress: dict
+        @param origin: If the name is relative and origin is not None, then
+        origin will be appended to it.
+        @type origin: dns.name.Name object
+        @raises NeedAbsoluteNameOrOrigin: All names in wire format are
+        absolute.  If self is a relative name, then an origin must be supplied;
+        if it is missing, then this exception is raised
+        """
+
+        if file is None:
+            file = BytesIO()
+            want_return = True
+        else:
+            want_return = False
+
+        if not self.is_absolute():
+            if origin is None or not origin.is_absolute():
+                raise NeedAbsoluteNameOrOrigin
+            labels = list(self.labels)
+            labels.extend(list(origin.labels))
+        else:
+            labels = self.labels
+        i = 0
+        for label in labels:
+            n = Name(labels[i:])
+            i += 1
+            if compress is not None:
+                pos = compress.get(n)
+            else:
+                pos = None
+            if pos is not None:
+                value = 0xc000 + pos
+                s = struct.pack('!H', value)
+                file.write(s)
+                break
+            else:
+                if compress is not None and len(n) > 1:
+                    pos = file.tell()
+                    if pos <= 0x3fff:
+                        compress[n] = pos
+                l = len(label)
+                file.write(struct.pack('!B', l))
+                if l > 0:
+                    file.write(label)
+        if want_return:
+            return file.getvalue()
+
+    def __len__(self):
+        """The length of the name (in labels).
+        @rtype: int
+        """
+
+        return len(self.labels)
+
+    def __getitem__(self, index):
+        return self.labels[index]
+
+    def __getslice__(self, start, stop):
+        return self.labels[start:stop]
+
+    def __add__(self, other):
+        return self.concatenate(other)
+
+    def __sub__(self, other):
+        return self.relativize(other)
+
+    def split(self, depth):
+        """Split a name into a prefix and suffix at depth.
+
+        @param depth: the number of labels in the suffix
+        @type depth: int
+        @raises ValueError: the depth was not >= 0 and <= the length of the
+        name.
+        @returns: the tuple (prefix, suffix)
+        @rtype: tuple
+        """
+
+        l = len(self.labels)
+        if depth == 0:
+            return (self, dns.name.empty)
+        elif depth == l:
+            return (dns.name.empty, self)
+        elif depth < 0 or depth > l:
+            raise ValueError(
+                'depth must be >= 0 and <= the length of the name')
+        return (Name(self[: -depth]), Name(self[-depth:]))
+
+    def concatenate(self, other):
+        """Return a new name which is the concatenation of self and other.
+        @rtype: dns.name.Name object
+        @raises AbsoluteConcatenation: self is absolute and other is
+        not the empty name
+        """
+
+        if self.is_absolute() and len(other) > 0:
+            raise AbsoluteConcatenation
+        labels = list(self.labels)
+        labels.extend(list(other.labels))
+        return Name(labels)
+
+    def relativize(self, origin):
+        """If self is a subdomain of origin, return a new name which is self
+        relative to origin.  Otherwise return self.
+        @rtype: dns.name.Name object
+        """
+
+        if origin is not None and self.is_subdomain(origin):
+            return Name(self[: -len(origin)])
+        else:
+            return self
+
+    def derelativize(self, origin):
+        """If self is a relative name, return a new name which is the
+        concatenation of self and origin.  Otherwise return self.
+        @rtype: dns.name.Name object
+        """
+
+        if not self.is_absolute():
+            return self.concatenate(origin)
+        else:
+            return self
+
+    def choose_relativity(self, origin=None, relativize=True):
+        """Return a name with the relativity desired by the caller.  If
+        origin is None, then self is returned.  Otherwise, if
+        relativize is true the name is relativized, and if relativize is
+        false the name is derelativized.
+        @rtype: dns.name.Name object
+        """
+
+        if origin:
+            if relativize:
+                return self.relativize(origin)
+            else:
+                return self.derelativize(origin)
+        else:
+            return self
+
+    def parent(self):
+        """Return the parent of the name.
+        @rtype: dns.name.Name object
+        @raises NoParent: the name is either the root name or the empty name,
+        and thus has no parent.
+        """
+        if self == root or self == empty:
+            raise NoParent
+        return Name(self.labels[1:])
+
+root = Name([b''])
+empty = Name([])
+
+
+def from_unicode(text, origin=root):
+    """Convert unicode text into a Name object.
+
+    Labels are encoded in IDN ACE form.
+
+    @rtype: dns.name.Name object
+    """
+
+    if not isinstance(text, text_type):
+        raise ValueError("input to from_unicode() must be a unicode string")
+    if not (origin is None or isinstance(origin, Name)):
+        raise ValueError("origin must be a Name or None")
+    labels = []
+    label = u''
+    escaping = False
+    edigits = 0
+    total = 0
+    if text == u'@':
+        text = u''
+    if text:
+        if text == u'.':
+            return Name([b''])        # no Unicode "u" on this constant!
+        for c in text:
+            if escaping:
+                if edigits == 0:
+                    if c.isdigit():
+                        total = int(c)
+                        edigits += 1
+                    else:
+                        label += c
+                        escaping = False
+                else:
+                    if not c.isdigit():
+                        raise BadEscape
+                    total *= 10
+                    total += int(c)
+                    edigits += 1
+                    if edigits == 3:
+                        escaping = False
+                        label += unichr(total)
+            elif c in [u'.', u'\u3002', u'\uff0e', u'\uff61']:
+                if len(label) == 0:
+                    raise EmptyLabel
+                try:
+                    labels.append(encodings.idna.ToASCII(label))
+                except UnicodeError:
+                    raise LabelTooLong
+                label = u''
+            elif c == u'\\':
+                escaping = True
+                edigits = 0
+                total = 0
+            else:
+                label += c
+        if escaping:
+            raise BadEscape
+        if len(label) > 0:
+            try:
+                labels.append(encodings.idna.ToASCII(label))
+            except UnicodeError:
+                raise LabelTooLong
+        else:
+            labels.append(b'')
+
+    if (len(labels) == 0 or labels[-1] != b'') and origin is not None:
+        labels.extend(list(origin.labels))
+    return Name(labels)
+
+
+def from_text(text, origin=root):
+    """Convert text into a Name object.
+    @rtype: dns.name.Name object
+    """
+
+    if isinstance(text, text_type):
+        return from_unicode(text, origin)
+    if not isinstance(text, binary_type):
+        raise ValueError("input to from_text() must be a string")
+    if not (origin is None or isinstance(origin, Name)):
+        raise ValueError("origin must be a Name or None")
+    labels = []
+    label = b''
+    escaping = False
+    edigits = 0
+    total = 0
+    if text == b'@':
+        text = b''
+    if text:
+        if text == b'.':
+            return Name([b''])
+        for c in bytearray(text):
+            byte_ = struct.pack('!B', c)
+            if escaping:
+                if edigits == 0:
+                    if byte_.isdigit():
+                        total = int(byte_)
+                        edigits += 1
+                    else:
+                        label += byte_
+                        escaping = False
+                else:
+                    if not byte_.isdigit():
+                        raise BadEscape
+                    total *= 10
+                    total += int(byte_)
+                    edigits += 1
+                    if edigits == 3:
+                        escaping = False
+                        label += struct.pack('!B', total)
+            elif byte_ == b'.':
+                if len(label) == 0:
+                    raise EmptyLabel
+                labels.append(label)
+                label = b''
+            elif byte_ == b'\\':
+                escaping = True
+                edigits = 0
+                total = 0
+            else:
+                label += byte_
+        if escaping:
+            raise BadEscape
+        if len(label) > 0:
+            labels.append(label)
+        else:
+            labels.append(b'')
+    if (len(labels) == 0 or labels[-1] != b'') and origin is not None:
+        labels.extend(list(origin.labels))
+    return Name(labels)
+
+
+def from_wire(message, current):
+    """Convert possibly compressed wire format into a Name.
+    @param message: the entire DNS message
+    @type message: string
+    @param current: the offset of the beginning of the name from the start
+    of the message
+    @type current: int
+    @raises dns.name.BadPointer: a compression pointer did not point backwards
+    in the message
+    @raises dns.name.BadLabelType: an invalid label type was encountered.
+    @returns: a tuple consisting of the name that was read and the number
+    of bytes of the wire format message which were consumed reading it
+    @rtype: (dns.name.Name object, int) tuple
+    """
+
+    if not isinstance(message, binary_type):
+        raise ValueError("input to from_wire() must be a byte string")
+    message = dns.wiredata.maybe_wrap(message)
+    labels = []
+    biggest_pointer = current
+    hops = 0
+    count = message[current]
+    current += 1
+    cused = 1
+    while count != 0:
+        if count < 64:
+            labels.append(message[current: current + count].unwrap())
+            current += count
+            if hops == 0:
+                cused += count
+        elif count >= 192:
+            current = (count & 0x3f) * 256 + message[current]
+            if hops == 0:
+                cused += 1
+            if current >= biggest_pointer:
+                raise BadPointer
+            biggest_pointer = current
+            hops += 1
+        else:
+            raise BadLabelType
+        count = message[current]
+        current += 1
+        if hops == 0:
+            cused += 1
+    labels.append('')
+    return (Name(labels), cused)

eventlet/support/dns/namedict.py

@@ -0,0 +1,104 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+# Copyright (C) 2016 Coresec Systems AB
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND CORESEC SYSTEMS AB DISCLAIMS ALL
+# WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL CORESEC
+# SYSTEMS AB BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
+# CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+# OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+# NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
+# WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""DNS name dictionary"""
+
+import collections
+import dns.name
+from ._compat import xrange
+
+
+class NameDict(collections.MutableMapping):
+
+    """A dictionary whose keys are dns.name.Name objects.
+    @ivar max_depth: the maximum depth of the keys that have ever been
+    added to the dictionary.
+    @type max_depth: int
+    @ivar max_depth_items: the number of items of maximum depth
+    @type max_depth_items: int
+    """
+
+    __slots__ = ["max_depth", "max_depth_items", "__store"]
+
+    def __init__(self, *args, **kwargs):
+        self.__store = dict()
+        self.max_depth = 0
+        self.max_depth_items = 0
+        self.update(dict(*args, **kwargs))
+
+    def __update_max_depth(self, key):
+        if len(key) == self.max_depth:
+            self.max_depth_items = self.max_depth_items + 1
+        elif len(key) > self.max_depth:
+            self.max_depth = len(key)
+            self.max_depth_items = 1
+
+    def __getitem__(self, key):
+        return self.__store[key]
+
+    def __setitem__(self, key, value):
+        if not isinstance(key, dns.name.Name):
+            raise ValueError('NameDict key must be a name')
+        self.__store[key] = value
+        self.__update_max_depth(key)
+
+    def __delitem__(self, key):
+        value = self.__store.pop(key)
+        if len(value) == self.max_depth:
+            self.max_depth_items = self.max_depth_items - 1
+        if self.max_depth_items == 0:
+            self.max_depth = 0
+            for k in self.__store:
+                self.__update_max_depth(k)
+
+    def __iter__(self):
+        return iter(self.__store)
+
+    def __len__(self):
+        return len(self.__store)
+
+    def has_key(self, key):
+        return key in self.__store
+
+    def get_deepest_match(self, name):
+        """Find the deepest match to I{name} in the dictionary.
+
+        The deepest match is the longest name in the dictionary which is
+        a superdomain of I{name}.
+
+        @param name: the name
+        @type name: dns.name.Name object
+        @rtype: (key, value) tuple
+        """
+
+        depth = len(name)
+        if depth > self.max_depth:
+            depth = self.max_depth
+        for i in xrange(-depth, 0):
+            n = dns.name.Name(name[i:])
+            if n in self:
+                return (n, self[n])
+        v = self[dns.name.empty]
+        return (dns.name.empty, v)

eventlet/support/dns/node.py

@@ -0,0 +1,178 @@
+# Copyright (C) 2001-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""DNS nodes.  A node is a set of rdatasets."""
+
+from io import StringIO
+
+import dns.rdataset
+import dns.rdatatype
+import dns.renderer
+
+
+class Node(object):
+
+    """A DNS node.
+
+    A node is a set of rdatasets
+
+    @ivar rdatasets: the node's rdatasets
+    @type rdatasets: list of dns.rdataset.Rdataset objects"""
+
+    __slots__ = ['rdatasets']
+
+    def __init__(self):
+        """Initialize a DNS node.
+        """
+
+        self.rdatasets = []
+
+    def to_text(self, name, **kw):
+        """Convert a node to text format.
+
+        Each rdataset at the node is printed.  Any keyword arguments
+        to this method are passed on to the rdataset's to_text() method.
+        @param name: the owner name of the rdatasets
+        @type name: dns.name.Name object
+        @rtype: string
+        """
+
+        s = StringIO()
+        for rds in self.rdatasets:
+            if len(rds) > 0:
+                s.write(rds.to_text(name, **kw))
+                s.write(u'\n')
+        return s.getvalue()[:-1]
+
+    def __repr__(self):
+        return '<DNS node ' + str(id(self)) + '>'
+
+    def __eq__(self, other):
+        """Two nodes are equal if they have the same rdatasets.
+
+        @rtype: bool
+        """
+        #
+        # This is inefficient.  Good thing we don't need to do it much.
+        #
+        for rd in self.rdatasets:
+            if rd not in other.rdatasets:
+                return False
+        for rd in other.rdatasets:
+            if rd not in self.rdatasets:
+                return False
+        return True
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    def __len__(self):
+        return len(self.rdatasets)
+
+    def __iter__(self):
+        return iter(self.rdatasets)
+
+    def find_rdataset(self, rdclass, rdtype, covers=dns.rdatatype.NONE,
+                      create=False):
+        """Find an rdataset matching the specified properties in the
+        current node.
+
+        @param rdclass: The class of the rdataset
+        @type rdclass: int
+        @param rdtype: The type of the rdataset
+        @type rdtype: int
+        @param covers: The covered type.  Usually this value is
+        dns.rdatatype.NONE, but if the rdtype is dns.rdatatype.SIG or
+        dns.rdatatype.RRSIG, then the covers value will be the rdata
+        type the SIG/RRSIG covers.  The library treats the SIG and RRSIG
+        types as if they were a family of
+        types, e.g. RRSIG(A), RRSIG(NS), RRSIG(SOA).  This makes RRSIGs much
+        easier to work with than if RRSIGs covering different rdata
+        types were aggregated into a single RRSIG rdataset.
+        @type covers: int
+        @param create: If True, create the rdataset if it is not found.
+        @type create: bool
+        @raises KeyError: An rdataset of the desired type and class does
+        not exist and I{create} is not True.
+        @rtype: dns.rdataset.Rdataset object
+        """
+
+        for rds in self.rdatasets:
+            if rds.match(rdclass, rdtype, covers):
+                return rds
+        if not create:
+            raise KeyError
+        rds = dns.rdataset.Rdataset(rdclass, rdtype)
+        self.rdatasets.append(rds)
+        return rds
+
+    def get_rdataset(self, rdclass, rdtype, covers=dns.rdatatype.NONE,
+                     create=False):
+        """Get an rdataset matching the specified properties in the
+        current node.
+
+        None is returned if an rdataset of the specified type and
+        class does not exist and I{create} is not True.
+
+        @param rdclass: The class of the rdataset
+        @type rdclass: int
+        @param rdtype: The type of the rdataset
+        @type rdtype: int
+        @param covers: The covered type.
+        @type covers: int
+        @param create: If True, create the rdataset if it is not found.
+        @type create: bool
+        @rtype: dns.rdataset.Rdataset object or None
+        """
+
+        try:
+            rds = self.find_rdataset(rdclass, rdtype, covers, create)
+        except KeyError:
+            rds = None
+        return rds
+
+    def delete_rdataset(self, rdclass, rdtype, covers=dns.rdatatype.NONE):
+        """Delete the rdataset matching the specified properties in the
+        current node.
+
+        If a matching rdataset does not exist, it is not an error.
+
+        @param rdclass: The class of the rdataset
+        @type rdclass: int
+        @param rdtype: The type of the rdataset
+        @type rdtype: int
+        @param covers: The covered type.
+        @type covers: int
+        """
+
+        rds = self.get_rdataset(rdclass, rdtype, covers)
+        if rds is not None:
+            self.rdatasets.remove(rds)
+
+    def replace_rdataset(self, replacement):
+        """Replace an rdataset.
+
+        It is not an error if there is no rdataset matching I{replacement}.
+
+        Ownership of the I{replacement} object is transferred to the node;
+        in other words, this method does not store a copy of I{replacement}
+        at the node, it stores I{replacement} itself.
+        """
+
+        if not isinstance(replacement, dns.rdataset.Rdataset):
+            raise ValueError('replacement is not an rdataset')
+        self.delete_rdataset(replacement.rdclass, replacement.rdtype,
+                             replacement.covers)
+        self.rdatasets.append(replacement)

eventlet/support/dns/opcode.py

@@ -0,0 +1,107 @@
+# Copyright (C) 2001-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""DNS Opcodes."""
+
+import dns.exception
+
+QUERY = 0
+IQUERY = 1
+STATUS = 2
+NOTIFY = 4
+UPDATE = 5
+
+_by_text = {
+    'QUERY': QUERY,
+    'IQUERY': IQUERY,
+    'STATUS': STATUS,
+    'NOTIFY': NOTIFY,
+    'UPDATE': UPDATE
+}
+
+# We construct the inverse mapping programmatically to ensure that we
+# cannot make any mistakes (e.g. omissions, cut-and-paste errors) that
+# would cause the mapping not to be true inverse.
+
+_by_value = dict((y, x) for x, y in _by_text.items())
+
+
+class UnknownOpcode(dns.exception.DNSException):
+
+    """An DNS opcode is unknown."""
+
+
+def from_text(text):
+    """Convert text into an opcode.
+
+    @param text: the textual opcode
+    @type text: string
+    @raises UnknownOpcode: the opcode is unknown
+    @rtype: int
+    """
+
+    if text.isdigit():
+        value = int(text)
+        if value >= 0 and value <= 15:
+            return value
+    value = _by_text.get(text.upper())
+    if value is None:
+        raise UnknownOpcode
+    return value
+
+
+def from_flags(flags):
+    """Extract an opcode from DNS message flags.
+
+    @param flags: int
+    @rtype: int
+    """
+
+    return (flags & 0x7800) >> 11
+
+
+def to_flags(value):
+    """Convert an opcode to a value suitable for ORing into DNS message
+    flags.
+    @rtype: int
+    """
+
+    return (value << 11) & 0x7800
+
+
+def to_text(value):
+    """Convert an opcode to text.
+
+    @param value: the opcdoe
+    @type value: int
+    @raises UnknownOpcode: the opcode is unknown
+    @rtype: string
+    """
+
+    text = _by_value.get(value)
+    if text is None:
+        text = str(value)
+    return text
+
+
+def is_update(flags):
+    """True if the opcode in flags is UPDATE.
+
+    @param flags: DNS flags
+    @type flags: int
+    @rtype: bool
+    """
+
+    return from_flags(flags) == UPDATE

eventlet/support/dns/query.py

@@ -0,0 +1,539 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""Talk to a DNS server."""
+
+from __future__ import generators
+
+import errno
+import select
+import socket
+import struct
+import sys
+import time
+
+import dns.exception
+import dns.inet
+import dns.name
+import dns.message
+import dns.rdataclass
+import dns.rdatatype
+from ._compat import long, string_types
+
+if sys.version_info > (3,):
+    select_error = OSError
+else:
+    select_error = select.error
+
+# Function used to create a socket.  Can be overridden if needed in special
+# situations.
+socket_factory = socket.socket
+
+class UnexpectedSource(dns.exception.DNSException):
+
+    """A DNS query response came from an unexpected address or port."""
+
+
+class BadResponse(dns.exception.FormError):
+
+    """A DNS query response does not respond to the question asked."""
+
+
+def _compute_expiration(timeout):
+    if timeout is None:
+        return None
+    else:
+        return time.time() + timeout
+
+
+def _poll_for(fd, readable, writable, error, timeout):
+    """Poll polling backend.
+    @param fd: File descriptor
+    @type fd: int
+    @param readable: Whether to wait for readability
+    @type readable: bool
+    @param writable: Whether to wait for writability
+    @type writable: bool
+    @param timeout: Deadline timeout (expiration time, in seconds)
+    @type timeout: float
+    @return True on success, False on timeout
+    """
+    event_mask = 0
+    if readable:
+        event_mask |= select.POLLIN
+    if writable:
+        event_mask |= select.POLLOUT
+    if error:
+        event_mask |= select.POLLERR
+
+    pollable = select.poll()
+    pollable.register(fd, event_mask)
+
+    if timeout:
+        event_list = pollable.poll(long(timeout * 1000))
+    else:
+        event_list = pollable.poll()
+
+    return bool(event_list)
+
+
+def _select_for(fd, readable, writable, error, timeout):
+    """Select polling backend.
+    @param fd: File descriptor
+    @type fd: int
+    @param readable: Whether to wait for readability
+    @type readable: bool
+    @param writable: Whether to wait for writability
+    @type writable: bool
+    @param timeout: Deadline timeout (expiration time, in seconds)
+    @type timeout: float
+    @return True on success, False on timeout
+    """
+    rset, wset, xset = [], [], []
+
+    if readable:
+        rset = [fd]
+    if writable:
+        wset = [fd]
+    if error:
+        xset = [fd]
+
+    if timeout is None:
+        (rcount, wcount, xcount) = select.select(rset, wset, xset)
+    else:
+        (rcount, wcount, xcount) = select.select(rset, wset, xset, timeout)
+
+    return bool((rcount or wcount or xcount))
+
+
+def _wait_for(fd, readable, writable, error, expiration):
+    done = False
+    while not done:
+        if expiration is None:
+            timeout = None
+        else:
+            timeout = expiration - time.time()
+            if timeout <= 0.0:
+                raise dns.exception.Timeout
+        try:
+            if not _polling_backend(fd, readable, writable, error, timeout):
+                raise dns.exception.Timeout
+        except select_error as e:
+            if e.args[0] != errno.EINTR:
+                raise e
+        done = True
+
+
+def _set_polling_backend(fn):
+    """
+    Internal API. Do not use.
+    """
+    global _polling_backend
+
+    _polling_backend = fn
+
+if hasattr(select, 'poll'):
+    # Prefer poll() on platforms that support it because it has no
+    # limits on the maximum value of a file descriptor (plus it will
+    # be more efficient for high values).
+    _polling_backend = _poll_for
+else:
+    _polling_backend = _select_for
+
+
+def _wait_for_readable(s, expiration):
+    _wait_for(s, True, False, True, expiration)
+
+
+def _wait_for_writable(s, expiration):
+    _wait_for(s, False, True, True, expiration)
+
+
+def _addresses_equal(af, a1, a2):
+    # Convert the first value of the tuple, which is a textual format
+    # address into binary form, so that we are not confused by different
+    # textual representations of the same address
+    n1 = dns.inet.inet_pton(af, a1[0])
+    n2 = dns.inet.inet_pton(af, a2[0])
+    return n1 == n2 and a1[1:] == a2[1:]
+
+
+def _destination_and_source(af, where, port, source, source_port):
+    # Apply defaults and compute destination and source tuples
+    # suitable for use in connect(), sendto(), or bind().
+    if af is None:
+        try:
+            af = dns.inet.af_for_address(where)
+        except:
+            af = dns.inet.AF_INET
+    if af == dns.inet.AF_INET:
+        destination = (where, port)
+        if source is not None or source_port != 0:
+            if source is None:
+                source = '0.0.0.0'
+            source = (source, source_port)
+    elif af == dns.inet.AF_INET6:
+        destination = (where, port, 0, 0)
+        if source is not None or source_port != 0:
+            if source is None:
+                source = '::'
+            source = (source, source_port, 0, 0)
+    return (af, destination, source)
+
+
+def udp(q, where, timeout=None, port=53, af=None, source=None, source_port=0,
+        ignore_unexpected=False, one_rr_per_rrset=False):
+    """Return the response obtained after sending a query via UDP.
+
+    @param q: the query
+    @type q: dns.message.Message
+    @param where: where to send the message
+    @type where: string containing an IPv4 or IPv6 address
+    @param timeout: The number of seconds to wait before the query times out.
+    If None, the default, wait forever.
+    @type timeout: float
+    @param port: The port to which to send the message.  The default is 53.
+    @type port: int
+    @param af: the address family to use.  The default is None, which
+    causes the address family to use to be inferred from the form of where.
+    If the inference attempt fails, AF_INET is used.
+    @type af: int
+    @rtype: dns.message.Message object
+    @param source: source address.  The default is the wildcard address.
+    @type source: string
+    @param source_port: The port from which to send the message.
+    The default is 0.
+    @type source_port: int
+    @param ignore_unexpected: If True, ignore responses from unexpected
+    sources.  The default is False.
+    @type ignore_unexpected: bool
+    @param one_rr_per_rrset: Put each RR into its own RRset
+    @type one_rr_per_rrset: bool
+    """
+
+    wire = q.to_wire()
+    (af, destination, source) = _destination_and_source(af, where, port,
+                                                        source, source_port)
+    s = socket_factory(af, socket.SOCK_DGRAM, 0)
+    begin_time = None
+    try:
+        expiration = _compute_expiration(timeout)
+        s.setblocking(0)
+        if source is not None:
+            s.bind(source)
+        _wait_for_writable(s, expiration)
+        begin_time = time.time()
+        s.sendto(wire, destination)
+        while 1:
+            _wait_for_readable(s, expiration)
+            (wire, from_address) = s.recvfrom(65535)
+            if _addresses_equal(af, from_address, destination) or \
+                    (dns.inet.is_multicast(where) and
+                     from_address[1:] == destination[1:]):
+                break
+            if not ignore_unexpected:
+                raise UnexpectedSource('got a response from '
+                                       '%s instead of %s' % (from_address,
+                                                             destination))
+    finally:
+        if begin_time is None:
+            response_time = 0
+        else:
+            response_time = time.time() - begin_time
+        s.close()
+    r = dns.message.from_wire(wire, keyring=q.keyring, request_mac=q.mac,
+                              one_rr_per_rrset=one_rr_per_rrset)
+    r.time = response_time
+    if not q.is_response(r):
+        raise BadResponse
+    return r
+
+
+def _net_read(sock, count, expiration):
+    """Read the specified number of bytes from sock.  Keep trying until we
+    either get the desired amount, or we hit EOF.
+    A Timeout exception will be raised if the operation is not completed
+    by the expiration time.
+    """
+    s = b''
+    while count > 0:
+        _wait_for_readable(sock, expiration)
+        n = sock.recv(count)
+        if n == b'':
+            raise EOFError
+        count = count - len(n)
+        s = s + n
+    return s
+
+
+def _net_write(sock, data, expiration):
+    """Write the specified data to the socket.
+    A Timeout exception will be raised if the operation is not completed
+    by the expiration time.
+    """
+    current = 0
+    l = len(data)
+    while current < l:
+        _wait_for_writable(sock, expiration)
+        current += sock.send(data[current:])
+
+
+def _connect(s, address):
+    try:
+        s.connect(address)
+    except socket.error:
+        (ty, v) = sys.exc_info()[:2]
+
+        if hasattr(v, 'errno'):
+            v_err = v.errno
+        else:
+            v_err = v[0]
+        if v_err not in [errno.EINPROGRESS, errno.EWOULDBLOCK, errno.EALREADY]:
+            raise v
+
+
+def tcp(q, where, timeout=None, port=53, af=None, source=None, source_port=0,
+        one_rr_per_rrset=False):
+    """Return the response obtained after sending a query via TCP.
+
+    @param q: the query
+    @type q: dns.message.Message object
+    @param where: where to send the message
+    @type where: string containing an IPv4 or IPv6 address
+    @param timeout: The number of seconds to wait before the query times out.
+    If None, the default, wait forever.
+    @type timeout: float
+    @param port: The port to which to send the message.  The default is 53.
+    @type port: int
+    @param af: the address family to use.  The default is None, which
+    causes the address family to use to be inferred from the form of where.
+    If the inference attempt fails, AF_INET is used.
+    @type af: int
+    @rtype: dns.message.Message object
+    @param source: source address.  The default is the wildcard address.
+    @type source: string
+    @param source_port: The port from which to send the message.
+    The default is 0.
+    @type source_port: int
+    @param one_rr_per_rrset: Put each RR into its own RRset
+    @type one_rr_per_rrset: bool
+    """
+
+    wire = q.to_wire()
+    (af, destination, source) = _destination_and_source(af, where, port,
+                                                        source, source_port)
+    s = socket_factory(af, socket.SOCK_STREAM, 0)
+    begin_time = None
+    try:
+        expiration = _compute_expiration(timeout)
+        s.setblocking(0)
+        begin_time = time.time()
+        if source is not None:
+            s.bind(source)
+        _connect(s, destination)
+
+        l = len(wire)
+
+        # copying the wire into tcpmsg is inefficient, but lets us
+        # avoid writev() or doing a short write that would get pushed
+        # onto the net
+        tcpmsg = struct.pack("!H", l) + wire
+        _net_write(s, tcpmsg, expiration)
+        ldata = _net_read(s, 2, expiration)
+        (l,) = struct.unpack("!H", ldata)
+        wire = _net_read(s, l, expiration)
+    finally:
+        if begin_time is None:
+            response_time = 0
+        else:
+            response_time = time.time() - begin_time
+        s.close()
+    r = dns.message.from_wire(wire, keyring=q.keyring, request_mac=q.mac,
+                              one_rr_per_rrset=one_rr_per_rrset)
+    r.time = response_time
+    if not q.is_response(r):
+        raise BadResponse
+    return r
+
+
+def xfr(where, zone, rdtype=dns.rdatatype.AXFR, rdclass=dns.rdataclass.IN,
+        timeout=None, port=53, keyring=None, keyname=None, relativize=True,
+        af=None, lifetime=None, source=None, source_port=0, serial=0,
+        use_udp=False, keyalgorithm=dns.tsig.default_algorithm):
+    """Return a generator for the responses to a zone transfer.
+
+    @param where: where to send the message
+    @type where: string containing an IPv4 or IPv6 address
+    @param zone: The name of the zone to transfer
+    @type zone: dns.name.Name object or string
+    @param rdtype: The type of zone transfer.  The default is
+    dns.rdatatype.AXFR.
+    @type rdtype: int or string
+    @param rdclass: The class of the zone transfer.  The default is
+    dns.rdataclass.IN.
+    @type rdclass: int or string
+    @param timeout: The number of seconds to wait for each response message.
+    If None, the default, wait forever.
+    @type timeout: float
+    @param port: The port to which to send the message.  The default is 53.
+    @type port: int
+    @param keyring: The TSIG keyring to use
+    @type keyring: dict
+    @param keyname: The name of the TSIG key to use
+    @type keyname: dns.name.Name object or string
+    @param relativize: If True, all names in the zone will be relativized to
+    the zone origin.  It is essential that the relativize setting matches
+    the one specified to dns.zone.from_xfr().
+    @type relativize: bool
+    @param af: the address family to use.  The default is None, which
+    causes the address family to use to be inferred from the form of where.
+    If the inference attempt fails, AF_INET is used.
+    @type af: int
+    @param lifetime: The total number of seconds to spend doing the transfer.
+    If None, the default, then there is no limit on the time the transfer may
+    take.
+    @type lifetime: float
+    @rtype: generator of dns.message.Message objects.
+    @param source: source address.  The default is the wildcard address.
+    @type source: string
+    @param source_port: The port from which to send the message.
+    The default is 0.
+    @type source_port: int
+    @param serial: The SOA serial number to use as the base for an IXFR diff
+    sequence (only meaningful if rdtype == dns.rdatatype.IXFR).
+    @type serial: int
+    @param use_udp: Use UDP (only meaningful for IXFR)
+    @type use_udp: bool
+    @param keyalgorithm: The TSIG algorithm to use; defaults to
+    dns.tsig.default_algorithm
+    @type keyalgorithm: string
+    """
+
+    if isinstance(zone, string_types):
+        zone = dns.name.from_text(zone)
+    if isinstance(rdtype, string_types):
+        rdtype = dns.rdatatype.from_text(rdtype)
+    q = dns.message.make_query(zone, rdtype, rdclass)
+    if rdtype == dns.rdatatype.IXFR:
+        rrset = dns.rrset.from_text(zone, 0, 'IN', 'SOA',
+                                    '. . %u 0 0 0 0' % serial)
+        q.authority.append(rrset)
+    if keyring is not None:
+        q.use_tsig(keyring, keyname, algorithm=keyalgorithm)
+    wire = q.to_wire()
+    (af, destination, source) = _destination_and_source(af, where, port,
+                                                        source, source_port)
+    if use_udp:
+        if rdtype != dns.rdatatype.IXFR:
+            raise ValueError('cannot do a UDP AXFR')
+        s = socket_factory(af, socket.SOCK_DGRAM, 0)
+    else:
+        s = socket_factory(af, socket.SOCK_STREAM, 0)
+    s.setblocking(0)
+    if source is not None:
+        s.bind(source)
+    expiration = _compute_expiration(lifetime)
+    _connect(s, destination)
+    l = len(wire)
+    if use_udp:
+        _wait_for_writable(s, expiration)
+        s.send(wire)
+    else:
+        tcpmsg = struct.pack("!H", l) + wire
+        _net_write(s, tcpmsg, expiration)
+    done = False
+    delete_mode = True
+    expecting_SOA = False
+    soa_rrset = None
+    if relativize:
+        origin = zone
+        oname = dns.name.empty
+    else:
+        origin = None
+        oname = zone
+    tsig_ctx = None
+    first = True
+    while not done:
+        mexpiration = _compute_expiration(timeout)
+        if mexpiration is None or mexpiration > expiration:
+            mexpiration = expiration
+        if use_udp:
+            _wait_for_readable(s, expiration)
+            (wire, from_address) = s.recvfrom(65535)
+        else:
+            ldata = _net_read(s, 2, mexpiration)
+            (l,) = struct.unpack("!H", ldata)
+            wire = _net_read(s, l, mexpiration)
+        is_ixfr = (rdtype == dns.rdatatype.IXFR)
+        r = dns.message.from_wire(wire, keyring=q.keyring, request_mac=q.mac,
+                                  xfr=True, origin=origin, tsig_ctx=tsig_ctx,
+                                  multi=True, first=first,
+                                  one_rr_per_rrset=is_ixfr)
+        tsig_ctx = r.tsig_ctx
+        first = False
+        answer_index = 0
+        if soa_rrset is None:
+            if not r.answer or r.answer[0].name != oname:
+                raise dns.exception.FormError(
+                    "No answer or RRset not for qname")
+            rrset = r.answer[0]
+            if rrset.rdtype != dns.rdatatype.SOA:
+                raise dns.exception.FormError("first RRset is not an SOA")
+            answer_index = 1
+            soa_rrset = rrset.copy()
+            if rdtype == dns.rdatatype.IXFR:
+                if soa_rrset[0].serial <= serial:
+                    #
+                    # We're already up-to-date.
+                    #
+                    done = True
+                else:
+                    expecting_SOA = True
+        #
+        # Process SOAs in the answer section (other than the initial
+        # SOA in the first message).
+        #
+        for rrset in r.answer[answer_index:]:
+            if done:
+                raise dns.exception.FormError("answers after final SOA")
+            if rrset.rdtype == dns.rdatatype.SOA and rrset.name == oname:
+                if expecting_SOA:
+                    if rrset[0].serial != serial:
+                        raise dns.exception.FormError(
+                            "IXFR base serial mismatch")
+                    expecting_SOA = False
+                elif rdtype == dns.rdatatype.IXFR:
+                    delete_mode = not delete_mode
+                #
+                # If this SOA RRset is equal to the first we saw then we're
+                # finished. If this is an IXFR we also check that we're seeing
+                # the record in the expected part of the response.
+                #
+                if rrset == soa_rrset and \
+                        (rdtype == dns.rdatatype.AXFR or
+                         (rdtype == dns.rdatatype.IXFR and delete_mode)):
+                    done = True
+            elif expecting_SOA:
+                #
+                # We made an IXFR request and are expecting another
+                # SOA RR, but saw something else, so this must be an
+                # AXFR response.
+                #
+                rdtype = dns.rdatatype.AXFR
+                expecting_SOA = False
+        if done and q.keyring and not r.had_tsig:
+            raise dns.exception.FormError("missing TSIG")
+        yield r
+    s.close()

eventlet/support/dns/rcode.py

@@ -0,0 +1,125 @@
+# Copyright (C) 2001-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""DNS Result Codes."""
+
+import dns.exception
+from ._compat import long
+
+
+NOERROR = 0
+FORMERR = 1
+SERVFAIL = 2
+NXDOMAIN = 3
+NOTIMP = 4
+REFUSED = 5
+YXDOMAIN = 6
+YXRRSET = 7
+NXRRSET = 8
+NOTAUTH = 9
+NOTZONE = 10
+BADVERS = 16
+
+_by_text = {
+    'NOERROR': NOERROR,
+    'FORMERR': FORMERR,
+    'SERVFAIL': SERVFAIL,
+    'NXDOMAIN': NXDOMAIN,
+    'NOTIMP': NOTIMP,
+    'REFUSED': REFUSED,
+    'YXDOMAIN': YXDOMAIN,
+    'YXRRSET': YXRRSET,
+    'NXRRSET': NXRRSET,
+    'NOTAUTH': NOTAUTH,
+    'NOTZONE': NOTZONE,
+    'BADVERS': BADVERS
+}
+
+# We construct the inverse mapping programmatically to ensure that we
+# cannot make any mistakes (e.g. omissions, cut-and-paste errors) that
+# would cause the mapping not to be a true inverse.
+
+_by_value = dict((y, x) for x, y in _by_text.items())
+
+
+class UnknownRcode(dns.exception.DNSException):
+
+    """A DNS rcode is unknown."""
+
+
+def from_text(text):
+    """Convert text into an rcode.
+
+    @param text: the textual rcode
+    @type text: string
+    @raises UnknownRcode: the rcode is unknown
+    @rtype: int
+    """
+
+    if text.isdigit():
+        v = int(text)
+        if v >= 0 and v <= 4095:
+            return v
+    v = _by_text.get(text.upper())
+    if v is None:
+        raise UnknownRcode
+    return v
+
+
+def from_flags(flags, ednsflags):
+    """Return the rcode value encoded by flags and ednsflags.
+
+    @param flags: the DNS flags
+    @type flags: int
+    @param ednsflags: the EDNS flags
+    @type ednsflags: int
+    @raises ValueError: rcode is < 0 or > 4095
+    @rtype: int
+    """
+
+    value = (flags & 0x000f) | ((ednsflags >> 20) & 0xff0)
+    if value < 0 or value > 4095:
+        raise ValueError('rcode must be >= 0 and <= 4095')
+    return value
+
+
+def to_flags(value):
+    """Return a (flags, ednsflags) tuple which encodes the rcode.
+
+    @param value: the rcode
+    @type value: int
+    @raises ValueError: rcode is < 0 or > 4095
+    @rtype: (int, int) tuple
+    """
+
+    if value < 0 or value > 4095:
+        raise ValueError('rcode must be >= 0 and <= 4095')
+    v = value & 0xf
+    ev = long(value & 0xff0) << 20
+    return (v, ev)
+
+
+def to_text(value):
+    """Convert rcode into text.
+
+    @param value: the rcode
+    @type value: int
+    @rtype: string
+    """
+
+    text = _by_value.get(value)
+    if text is None:
+        text = str(value)
+    return text

eventlet/support/dns/rdata.py

@@ -0,0 +1,458 @@
+# Copyright (C) 2001-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""DNS rdata.
+
+@var _rdata_modules: A dictionary mapping a (rdclass, rdtype) tuple to
+the module which implements that type.
+@type _rdata_modules: dict
+@var _module_prefix: The prefix to use when forming modules names.  The
+default is 'dns.rdtypes'.  Changing this value will break the library.
+@type _module_prefix: string
+@var _hex_chunk: At most this many octets that will be represented in each
+chunk of hexstring that _hexify() produces before whitespace occurs.
+@type _hex_chunk: int"""
+
+from io import BytesIO
+import base64
+import binascii
+
+import dns.exception
+import dns.name
+import dns.rdataclass
+import dns.rdatatype
+import dns.tokenizer
+import dns.wiredata
+from ._compat import xrange, string_types, text_type
+
+_hex_chunksize = 32
+
+
+def _hexify(data, chunksize=_hex_chunksize):
+    """Convert a binary string into its hex encoding, broken up into chunks
+    of I{chunksize} characters separated by a space.
+
+    @param data: the binary string
+    @type data: string
+    @param chunksize: the chunk size.  Default is L{dns.rdata._hex_chunksize}
+    @rtype: string
+    """
+
+    line = binascii.hexlify(data)
+    return b' '.join([line[i:i + chunksize]
+                      for i
+                      in range(0, len(line), chunksize)]).decode()
+
+_base64_chunksize = 32
+
+
+def _base64ify(data, chunksize=_base64_chunksize):
+    """Convert a binary string into its base64 encoding, broken up into chunks
+    of I{chunksize} characters separated by a space.
+
+    @param data: the binary string
+    @type data: string
+    @param chunksize: the chunk size.  Default is
+    L{dns.rdata._base64_chunksize}
+    @rtype: string
+    """
+
+    line = base64.b64encode(data)
+    return b' '.join([line[i:i + chunksize]
+                      for i
+                      in range(0, len(line), chunksize)]).decode()
+
+__escaped = bytearray(b'"\\')
+
+def _escapify(qstring):
+    """Escape the characters in a quoted string which need it.
+
+    @param qstring: the string
+    @type qstring: string
+    @returns: the escaped string
+    @rtype: string
+    """
+
+    if isinstance(qstring, text_type):
+        qstring = qstring.encode()
+    if not isinstance(qstring, bytearray):
+        qstring = bytearray(qstring)
+
+    text = ''
+    for c in qstring:
+        if c in __escaped:
+            text += '\\' + chr(c)
+        elif c >= 0x20 and c < 0x7F:
+            text += chr(c)
+        else:
+            text += '\\%03d' % c
+    return text
+
+
+def _truncate_bitmap(what):
+    """Determine the index of greatest byte that isn't all zeros, and
+    return the bitmap that contains all the bytes less than that index.
+
+    @param what: a string of octets representing a bitmap.
+    @type what: string
+    @rtype: string
+    """
+
+    for i in xrange(len(what) - 1, -1, -1):
+        if what[i] != 0:
+            return what[0: i + 1]
+    return what[0:1]
+
+
+class Rdata(object):
+
+    """Base class for all DNS rdata types.
+    """
+
+    __slots__ = ['rdclass', 'rdtype']
+
+    def __init__(self, rdclass, rdtype):
+        """Initialize an rdata.
+        @param rdclass: The rdata class
+        @type rdclass: int
+        @param rdtype: The rdata type
+        @type rdtype: int
+        """
+
+        self.rdclass = rdclass
+        self.rdtype = rdtype
+
+    def covers(self):
+        """DNS SIG/RRSIG rdatas apply to a specific type; this type is
+        returned by the covers() function.  If the rdata type is not
+        SIG or RRSIG, dns.rdatatype.NONE is returned.  This is useful when
+        creating rdatasets, allowing the rdataset to contain only RRSIGs
+        of a particular type, e.g. RRSIG(NS).
+        @rtype: int
+        """
+
+        return dns.rdatatype.NONE
+
+    def extended_rdatatype(self):
+        """Return a 32-bit type value, the least significant 16 bits of
+        which are the ordinary DNS type, and the upper 16 bits of which are
+        the "covered" type, if any.
+        @rtype: int
+        """
+
+        return self.covers() << 16 | self.rdtype
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        """Convert an rdata to text format.
+        @rtype: string
+        """
+        raise NotImplementedError
+
+    def to_wire(self, file, compress=None, origin=None):
+        """Convert an rdata to wire format.
+        @rtype: string
+        """
+
+        raise NotImplementedError
+
+    def to_digestable(self, origin=None):
+        """Convert rdata to a format suitable for digesting in hashes.  This
+        is also the DNSSEC canonical form."""
+        f = BytesIO()
+        self.to_wire(f, None, origin)
+        return f.getvalue()
+
+    def validate(self):
+        """Check that the current contents of the rdata's fields are
+        valid.  If you change an rdata by assigning to its fields,
+        it is a good idea to call validate() when you are done making
+        changes.
+        """
+        dns.rdata.from_text(self.rdclass, self.rdtype, self.to_text())
+
+    def __repr__(self):
+        covers = self.covers()
+        if covers == dns.rdatatype.NONE:
+            ctext = ''
+        else:
+            ctext = '(' + dns.rdatatype.to_text(covers) + ')'
+        return '<DNS ' + dns.rdataclass.to_text(self.rdclass) + ' ' + \
+               dns.rdatatype.to_text(self.rdtype) + ctext + ' rdata: ' + \
+               str(self) + '>'
+
+    def __str__(self):
+        return self.to_text()
+
+    def _cmp(self, other):
+        """Compare an rdata with another rdata of the same rdtype and
+        rdclass.  Return < 0 if self < other in the DNSSEC ordering,
+        0 if self == other, and > 0 if self > other.
+        """
+        our = self.to_digestable(dns.name.root)
+        their = other.to_digestable(dns.name.root)
+        if our == their:
+            return 0
+        if our > their:
+            return 1
+
+        return -1
+
+    def __eq__(self, other):
+        if not isinstance(other, Rdata):
+            return False
+        if self.rdclass != other.rdclass or self.rdtype != other.rdtype:
+            return False
+        return self._cmp(other) == 0
+
+    def __ne__(self, other):
+        if not isinstance(other, Rdata):
+            return True
+        if self.rdclass != other.rdclass or self.rdtype != other.rdtype:
+            return True
+        return self._cmp(other) != 0
+
+    def __lt__(self, other):
+        if not isinstance(other, Rdata) or \
+                self.rdclass != other.rdclass or self.rdtype != other.rdtype:
+
+            return NotImplemented
+        return self._cmp(other) < 0
+
+    def __le__(self, other):
+        if not isinstance(other, Rdata) or \
+                self.rdclass != other.rdclass or self.rdtype != other.rdtype:
+            return NotImplemented
+        return self._cmp(other) <= 0
+
+    def __ge__(self, other):
+        if not isinstance(other, Rdata) or \
+                self.rdclass != other.rdclass or self.rdtype != other.rdtype:
+            return NotImplemented
+        return self._cmp(other) >= 0
+
+    def __gt__(self, other):
+        if not isinstance(other, Rdata) or \
+                self.rdclass != other.rdclass or self.rdtype != other.rdtype:
+            return NotImplemented
+        return self._cmp(other) > 0
+
+    def __hash__(self):
+        return hash(self.to_digestable(dns.name.root))
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        """Build an rdata object from text format.
+
+        @param rdclass: The rdata class
+        @type rdclass: int
+        @param rdtype: The rdata type
+        @type rdtype: int
+        @param tok: The tokenizer
+        @type tok: dns.tokenizer.Tokenizer
+        @param origin: The origin to use for relative names
+        @type origin: dns.name.Name
+        @param relativize: should names be relativized?
+        @type relativize: bool
+        @rtype: dns.rdata.Rdata instance
+        """
+
+        raise NotImplementedError
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        """Build an rdata object from wire format
+
+        @param rdclass: The rdata class
+        @type rdclass: int
+        @param rdtype: The rdata type
+        @type rdtype: int
+        @param wire: The wire-format message
+        @type wire: string
+        @param current: The offset in wire of the beginning of the rdata.
+        @type current: int
+        @param rdlen: The length of the wire-format rdata
+        @type rdlen: int
+        @param origin: The origin to use for relative names
+        @type origin: dns.name.Name
+        @rtype: dns.rdata.Rdata instance
+        """
+
+        raise NotImplementedError
+
+    def choose_relativity(self, origin=None, relativize=True):
+        """Convert any domain names in the rdata to the specified
+        relativization.
+        """
+
+        pass
+
+
+class GenericRdata(Rdata):
+
+    """Generate Rdata Class
+
+    This class is used for rdata types for which we have no better
+    implementation.  It implements the DNS "unknown RRs" scheme.
+    """
+
+    __slots__ = ['data']
+
+    def __init__(self, rdclass, rdtype, data):
+        super(GenericRdata, self).__init__(rdclass, rdtype)
+        self.data = data
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        return r'\# %d ' % len(self.data) + _hexify(self.data)
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        token = tok.get()
+        if not token.is_identifier() or token.value != '\#':
+            raise dns.exception.SyntaxError(
+                r'generic rdata does not start with \#')
+        length = tok.get_int()
+        chunks = []
+        while 1:
+            token = tok.get()
+            if token.is_eol_or_eof():
+                break
+            chunks.append(token.value.encode())
+        hex = b''.join(chunks)
+        data = binascii.unhexlify(hex)
+        if len(data) != length:
+            raise dns.exception.SyntaxError(
+                'generic rdata hex data has wrong length')
+        return cls(rdclass, rdtype, data)
+
+    def to_wire(self, file, compress=None, origin=None):
+        file.write(self.data)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        return cls(rdclass, rdtype, wire[current: current + rdlen])
+
+_rdata_modules = {}
+_module_prefix = 'dns.rdtypes'
+
+
+def get_rdata_class(rdclass, rdtype):
+
+    def import_module(name):
+        mod = __import__(name)
+        components = name.split('.')
+        for comp in components[1:]:
+            mod = getattr(mod, comp)
+        return mod
+
+    mod = _rdata_modules.get((rdclass, rdtype))
+    rdclass_text = dns.rdataclass.to_text(rdclass)
+    rdtype_text = dns.rdatatype.to_text(rdtype)
+    rdtype_text = rdtype_text.replace('-', '_')
+    if not mod:
+        mod = _rdata_modules.get((dns.rdatatype.ANY, rdtype))
+        if not mod:
+            try:
+                mod = import_module('.'.join([_module_prefix,
+                                              rdclass_text, rdtype_text]))
+                _rdata_modules[(rdclass, rdtype)] = mod
+            except ImportError:
+                try:
+                    mod = import_module('.'.join([_module_prefix,
+                                                  'ANY', rdtype_text]))
+                    _rdata_modules[(dns.rdataclass.ANY, rdtype)] = mod
+                except ImportError:
+                    mod = None
+    if mod:
+        cls = getattr(mod, rdtype_text)
+    else:
+        cls = GenericRdata
+    return cls
+
+
+def from_text(rdclass, rdtype, tok, origin=None, relativize=True):
+    """Build an rdata object from text format.
+
+    This function attempts to dynamically load a class which
+    implements the specified rdata class and type.  If there is no
+    class-and-type-specific implementation, the GenericRdata class
+    is used.
+
+    Once a class is chosen, its from_text() class method is called
+    with the parameters to this function.
+
+    If I{tok} is a string, then a tokenizer is created and the string
+    is used as its input.
+
+    @param rdclass: The rdata class
+    @type rdclass: int
+    @param rdtype: The rdata type
+    @type rdtype: int
+    @param tok: The tokenizer or input text
+    @type tok: dns.tokenizer.Tokenizer or string
+    @param origin: The origin to use for relative names
+    @type origin: dns.name.Name
+    @param relativize: Should names be relativized?
+    @type relativize: bool
+    @rtype: dns.rdata.Rdata instance"""
+
+    if isinstance(tok, string_types):
+        tok = dns.tokenizer.Tokenizer(tok)
+    cls = get_rdata_class(rdclass, rdtype)
+    if cls != GenericRdata:
+        # peek at first token
+        token = tok.get()
+        tok.unget(token)
+        if token.is_identifier() and \
+           token.value == r'\#':
+            #
+            # Known type using the generic syntax.  Extract the
+            # wire form from the generic syntax, and then run
+            # from_wire on it.
+            #
+            rdata = GenericRdata.from_text(rdclass, rdtype, tok, origin,
+                                           relativize)
+            return from_wire(rdclass, rdtype, rdata.data, 0, len(rdata.data),
+                             origin)
+    return cls.from_text(rdclass, rdtype, tok, origin, relativize)
+
+
+def from_wire(rdclass, rdtype, wire, current, rdlen, origin=None):
+    """Build an rdata object from wire format
+
+    This function attempts to dynamically load a class which
+    implements the specified rdata class and type.  If there is no
+    class-and-type-specific implementation, the GenericRdata class
+    is used.
+
+    Once a class is chosen, its from_wire() class method is called
+    with the parameters to this function.
+
+    @param rdclass: The rdata class
+    @type rdclass: int
+    @param rdtype: The rdata type
+    @type rdtype: int
+    @param wire: The wire-format message
+    @type wire: string
+    @param current: The offset in wire of the beginning of the rdata.
+    @type current: int
+    @param rdlen: The length of the wire-format rdata
+    @type rdlen: int
+    @param origin: The origin to use for relative names
+    @type origin: dns.name.Name
+    @rtype: dns.rdata.Rdata instance"""
+
+    wire = dns.wiredata.maybe_wrap(wire)
+    cls = get_rdata_class(rdclass, rdtype)
+    return cls.from_wire(rdclass, rdtype, wire, current, rdlen, origin)

eventlet/support/dns/rdataclass.py

@@ -0,0 +1,118 @@
+# Copyright (C) 2001-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""DNS Rdata Classes.
+
+@var _by_text: The rdata class textual name to value mapping
+@type _by_text: dict
+@var _by_value: The rdata class value to textual name mapping
+@type _by_value: dict
+@var _metaclasses: If an rdataclass is a metaclass, there will be a mapping
+whose key is the rdatatype value and whose value is True in this dictionary.
+@type _metaclasses: dict"""
+
+import re
+
+import dns.exception
+
+RESERVED0 = 0
+IN = 1
+CH = 3
+HS = 4
+NONE = 254
+ANY = 255
+
+_by_text = {
+    'RESERVED0': RESERVED0,
+    'IN': IN,
+    'CH': CH,
+    'HS': HS,
+    'NONE': NONE,
+    'ANY': ANY
+}
+
+# We construct the inverse mapping programmatically to ensure that we
+# cannot make any mistakes (e.g. omissions, cut-and-paste errors) that
+# would cause the mapping not to be true inverse.
+
+_by_value = dict((y, x) for x, y in _by_text.items())
+
+# Now that we've built the inverse map, we can add class aliases to
+# the _by_text mapping.
+
+_by_text.update({
+    'INTERNET': IN,
+    'CHAOS': CH,
+    'HESIOD': HS
+})
+
+_metaclasses = {
+    NONE: True,
+    ANY: True
+}
+
+_unknown_class_pattern = re.compile('CLASS([0-9]+)$', re.I)
+
+
+class UnknownRdataclass(dns.exception.DNSException):
+
+    """A DNS class is unknown."""
+
+
+def from_text(text):
+    """Convert text into a DNS rdata class value.
+    @param text: the text
+    @type text: string
+    @rtype: int
+    @raises dns.rdataclass.UnknownRdataclass: the class is unknown
+    @raises ValueError: the rdata class value is not >= 0 and <= 65535
+    """
+
+    value = _by_text.get(text.upper())
+    if value is None:
+        match = _unknown_class_pattern.match(text)
+        if match is None:
+            raise UnknownRdataclass
+        value = int(match.group(1))
+        if value < 0 or value > 65535:
+            raise ValueError("class must be between >= 0 and <= 65535")
+    return value
+
+
+def to_text(value):
+    """Convert a DNS rdata class to text.
+    @param value: the rdata class value
+    @type value: int
+    @rtype: string
+    @raises ValueError: the rdata class value is not >= 0 and <= 65535
+    """
+
+    if value < 0 or value > 65535:
+        raise ValueError("class must be between >= 0 and <= 65535")
+    text = _by_value.get(value)
+    if text is None:
+        text = 'CLASS' + repr(value)
+    return text
+
+
+def is_metaclass(rdclass):
+    """True if the class is a metaclass.
+    @param rdclass: the rdata class
+    @type rdclass: int
+    @rtype: bool"""
+
+    if rdclass in _metaclasses:
+        return True
+    return False

eventlet/support/dns/rdataset.py

@@ -0,0 +1,338 @@
+# Copyright (C) 2001-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""DNS rdatasets (an rdataset is a set of rdatas of a given type and class)"""
+
+import random
+from io import StringIO
+import struct
+
+import dns.exception
+import dns.rdatatype
+import dns.rdataclass
+import dns.rdata
+import dns.set
+from ._compat import string_types
+
+# define SimpleSet here for backwards compatibility
+SimpleSet = dns.set.Set
+
+
+class DifferingCovers(dns.exception.DNSException):
+
+    """An attempt was made to add a DNS SIG/RRSIG whose covered type
+    is not the same as that of the other rdatas in the rdataset."""
+
+
+class IncompatibleTypes(dns.exception.DNSException):
+
+    """An attempt was made to add DNS RR data of an incompatible type."""
+
+
+class Rdataset(dns.set.Set):
+
+    """A DNS rdataset.
+
+    @ivar rdclass: The class of the rdataset
+    @type rdclass: int
+    @ivar rdtype: The type of the rdataset
+    @type rdtype: int
+    @ivar covers: The covered type.  Usually this value is
+    dns.rdatatype.NONE, but if the rdtype is dns.rdatatype.SIG or
+    dns.rdatatype.RRSIG, then the covers value will be the rdata
+    type the SIG/RRSIG covers.  The library treats the SIG and RRSIG
+    types as if they were a family of
+    types, e.g. RRSIG(A), RRSIG(NS), RRSIG(SOA).  This makes RRSIGs much
+    easier to work with than if RRSIGs covering different rdata
+    types were aggregated into a single RRSIG rdataset.
+    @type covers: int
+    @ivar ttl: The DNS TTL (Time To Live) value
+    @type ttl: int
+    """
+
+    __slots__ = ['rdclass', 'rdtype', 'covers', 'ttl']
+
+    def __init__(self, rdclass, rdtype, covers=dns.rdatatype.NONE):
+        """Create a new rdataset of the specified class and type.
+
+        @see: the description of the class instance variables for the
+        meaning of I{rdclass} and I{rdtype}"""
+
+        super(Rdataset, self).__init__()
+        self.rdclass = rdclass
+        self.rdtype = rdtype
+        self.covers = covers
+        self.ttl = 0
+
+    def _clone(self):
+        obj = super(Rdataset, self)._clone()
+        obj.rdclass = self.rdclass
+        obj.rdtype = self.rdtype
+        obj.covers = self.covers
+        obj.ttl = self.ttl
+        return obj
+
+    def update_ttl(self, ttl):
+        """Set the TTL of the rdataset to be the lesser of the set's current
+        TTL or the specified TTL.  If the set contains no rdatas, set the TTL
+        to the specified TTL.
+        @param ttl: The TTL
+        @type ttl: int"""
+
+        if len(self) == 0:
+            self.ttl = ttl
+        elif ttl < self.ttl:
+            self.ttl = ttl
+
+    def add(self, rd, ttl=None):
+        """Add the specified rdata to the rdataset.
+
+        If the optional I{ttl} parameter is supplied, then
+        self.update_ttl(ttl) will be called prior to adding the rdata.
+
+        @param rd: The rdata
+        @type rd: dns.rdata.Rdata object
+        @param ttl: The TTL
+        @type ttl: int"""
+
+        #
+        # If we're adding a signature, do some special handling to
+        # check that the signature covers the same type as the
+        # other rdatas in this rdataset.  If this is the first rdata
+        # in the set, initialize the covers field.
+        #
+        if self.rdclass != rd.rdclass or self.rdtype != rd.rdtype:
+            raise IncompatibleTypes
+        if ttl is not None:
+            self.update_ttl(ttl)
+        if self.rdtype == dns.rdatatype.RRSIG or \
+           self.rdtype == dns.rdatatype.SIG:
+            covers = rd.covers()
+            if len(self) == 0 and self.covers == dns.rdatatype.NONE:
+                self.covers = covers
+            elif self.covers != covers:
+                raise DifferingCovers
+        if dns.rdatatype.is_singleton(rd.rdtype) and len(self) > 0:
+            self.clear()
+        super(Rdataset, self).add(rd)
+
+    def union_update(self, other):
+        self.update_ttl(other.ttl)
+        super(Rdataset, self).union_update(other)
+
+    def intersection_update(self, other):
+        self.update_ttl(other.ttl)
+        super(Rdataset, self).intersection_update(other)
+
+    def update(self, other):
+        """Add all rdatas in other to self.
+
+        @param other: The rdataset from which to update
+        @type other: dns.rdataset.Rdataset object"""
+
+        self.update_ttl(other.ttl)
+        super(Rdataset, self).update(other)
+
+    def __repr__(self):
+        if self.covers == 0:
+            ctext = ''
+        else:
+            ctext = '(' + dns.rdatatype.to_text(self.covers) + ')'
+        return '<DNS ' + dns.rdataclass.to_text(self.rdclass) + ' ' + \
+               dns.rdatatype.to_text(self.rdtype) + ctext + ' rdataset>'
+
+    def __str__(self):
+        return self.to_text()
+
+    def __eq__(self, other):
+        """Two rdatasets are equal if they have the same class, type, and
+        covers, and contain the same rdata.
+        @rtype: bool"""
+
+        if not isinstance(other, Rdataset):
+            return False
+        if self.rdclass != other.rdclass or \
+           self.rdtype != other.rdtype or \
+           self.covers != other.covers:
+            return False
+        return super(Rdataset, self).__eq__(other)
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    def to_text(self, name=None, origin=None, relativize=True,
+                override_rdclass=None, **kw):
+        """Convert the rdataset into DNS master file format.
+
+        @see: L{dns.name.Name.choose_relativity} for more information
+        on how I{origin} and I{relativize} determine the way names
+        are emitted.
+
+        Any additional keyword arguments are passed on to the rdata
+        to_text() method.
+
+        @param name: If name is not None, emit a RRs with I{name} as
+        the owner name.
+        @type name: dns.name.Name object
+        @param origin: The origin for relative names, or None.
+        @type origin: dns.name.Name object
+        @param relativize: True if names should names be relativized
+        @type relativize: bool"""
+        if name is not None:
+            name = name.choose_relativity(origin, relativize)
+            ntext = str(name)
+            pad = ' '
+        else:
+            ntext = ''
+            pad = ''
+        s = StringIO()
+        if override_rdclass is not None:
+            rdclass = override_rdclass
+        else:
+            rdclass = self.rdclass
+        if len(self) == 0:
+            #
+            # Empty rdatasets are used for the question section, and in
+            # some dynamic updates, so we don't need to print out the TTL
+            # (which is meaningless anyway).
+            #
+            s.write(u'%s%s%s %s\n' % (ntext, pad,
+                                      dns.rdataclass.to_text(rdclass),
+                                      dns.rdatatype.to_text(self.rdtype)))
+        else:
+            for rd in self:
+                s.write(u'%s%s%d %s %s %s\n' %
+                        (ntext, pad, self.ttl, dns.rdataclass.to_text(rdclass),
+                         dns.rdatatype.to_text(self.rdtype),
+                         rd.to_text(origin=origin, relativize=relativize,
+                         **kw)))
+        #
+        # We strip off the final \n for the caller's convenience in printing
+        #
+        return s.getvalue()[:-1]
+
+    def to_wire(self, name, file, compress=None, origin=None,
+                override_rdclass=None, want_shuffle=True):
+        """Convert the rdataset to wire format.
+
+        @param name: The owner name of the RRset that will be emitted
+        @type name: dns.name.Name object
+        @param file: The file to which the wire format data will be appended
+        @type file: file
+        @param compress: The compression table to use; the default is None.
+        @type compress: dict
+        @param origin: The origin to be appended to any relative names when
+        they are emitted.  The default is None.
+        @returns: the number of records emitted
+        @rtype: int
+        """
+
+        if override_rdclass is not None:
+            rdclass = override_rdclass
+            want_shuffle = False
+        else:
+            rdclass = self.rdclass
+        file.seek(0, 2)
+        if len(self) == 0:
+            name.to_wire(file, compress, origin)
+            stuff = struct.pack("!HHIH", self.rdtype, rdclass, 0, 0)
+            file.write(stuff)
+            return 1
+        else:
+            if want_shuffle:
+                l = list(self)
+                random.shuffle(l)
+            else:
+                l = self
+            for rd in l:
+                name.to_wire(file, compress, origin)
+                stuff = struct.pack("!HHIH", self.rdtype, rdclass,
+                                    self.ttl, 0)
+                file.write(stuff)
+                start = file.tell()
+                rd.to_wire(file, compress, origin)
+                end = file.tell()
+                assert end - start < 65536
+                file.seek(start - 2)
+                stuff = struct.pack("!H", end - start)
+                file.write(stuff)
+                file.seek(0, 2)
+            return len(self)
+
+    def match(self, rdclass, rdtype, covers):
+        """Returns True if this rdataset matches the specified class, type,
+        and covers"""
+        if self.rdclass == rdclass and \
+           self.rdtype == rdtype and \
+           self.covers == covers:
+            return True
+        return False
+
+
+def from_text_list(rdclass, rdtype, ttl, text_rdatas):
+    """Create an rdataset with the specified class, type, and TTL, and with
+    the specified list of rdatas in text format.
+
+    @rtype: dns.rdataset.Rdataset object
+    """
+
+    if isinstance(rdclass, string_types):
+        rdclass = dns.rdataclass.from_text(rdclass)
+    if isinstance(rdtype, string_types):
+        rdtype = dns.rdatatype.from_text(rdtype)
+    r = Rdataset(rdclass, rdtype)
+    r.update_ttl(ttl)
+    for t in text_rdatas:
+        rd = dns.rdata.from_text(r.rdclass, r.rdtype, t)
+        r.add(rd)
+    return r
+
+
+def from_text(rdclass, rdtype, ttl, *text_rdatas):
+    """Create an rdataset with the specified class, type, and TTL, and with
+    the specified rdatas in text format.
+
+    @rtype: dns.rdataset.Rdataset object
+    """
+
+    return from_text_list(rdclass, rdtype, ttl, text_rdatas)
+
+
+def from_rdata_list(ttl, rdatas):
+    """Create an rdataset with the specified TTL, and with
+    the specified list of rdata objects.
+
+    @rtype: dns.rdataset.Rdataset object
+    """
+
+    if len(rdatas) == 0:
+        raise ValueError("rdata list must not be empty")
+    r = None
+    for rd in rdatas:
+        if r is None:
+            r = Rdataset(rd.rdclass, rd.rdtype)
+            r.update_ttl(ttl)
+        r.add(rd)
+    return r
+
+
+def from_rdata(ttl, *rdatas):
+    """Create an rdataset with the specified TTL, and with
+    the specified rdata objects.
+
+    @rtype: dns.rdataset.Rdataset object
+    """
+
+    return from_rdata_list(ttl, rdatas)

eventlet/support/dns/rdatatype.py

@@ -0,0 +1,253 @@
+# Copyright (C) 2001-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""DNS Rdata Types.
+
+@var _by_text: The rdata type textual name to value mapping
+@type _by_text: dict
+@var _by_value: The rdata type value to textual name mapping
+@type _by_value: dict
+@var _metatypes: If an rdatatype is a metatype, there will be a mapping
+whose key is the rdatatype value and whose value is True in this dictionary.
+@type _metatypes: dict
+@var _singletons: If an rdatatype is a singleton, there will be a mapping
+whose key is the rdatatype value and whose value is True in this dictionary.
+@type _singletons: dict"""
+
+import re
+
+import dns.exception
+
+NONE = 0
+A = 1
+NS = 2
+MD = 3
+MF = 4
+CNAME = 5
+SOA = 6
+MB = 7
+MG = 8
+MR = 9
+NULL = 10
+WKS = 11
+PTR = 12
+HINFO = 13
+MINFO = 14
+MX = 15
+TXT = 16
+RP = 17
+AFSDB = 18
+X25 = 19
+ISDN = 20
+RT = 21
+NSAP = 22
+NSAP_PTR = 23
+SIG = 24
+KEY = 25
+PX = 26
+GPOS = 27
+AAAA = 28
+LOC = 29
+NXT = 30
+SRV = 33
+NAPTR = 35
+KX = 36
+CERT = 37
+A6 = 38
+DNAME = 39
+OPT = 41
+APL = 42
+DS = 43
+SSHFP = 44
+IPSECKEY = 45
+RRSIG = 46
+NSEC = 47
+DNSKEY = 48
+DHCID = 49
+NSEC3 = 50
+NSEC3PARAM = 51
+TLSA = 52
+HIP = 55
+CDS = 59
+CDNSKEY = 60
+CSYNC = 62
+SPF = 99
+UNSPEC = 103
+EUI48 = 108
+EUI64 = 109
+TKEY = 249
+TSIG = 250
+IXFR = 251
+AXFR = 252
+MAILB = 253
+MAILA = 254
+ANY = 255
+URI = 256
+CAA = 257
+TA = 32768
+DLV = 32769
+
+_by_text = {
+    'NONE': NONE,
+    'A': A,
+    'NS': NS,
+    'MD': MD,
+    'MF': MF,
+    'CNAME': CNAME,
+    'SOA': SOA,
+    'MB': MB,
+    'MG': MG,
+    'MR': MR,
+    'NULL': NULL,
+    'WKS': WKS,
+    'PTR': PTR,
+    'HINFO': HINFO,
+    'MINFO': MINFO,
+    'MX': MX,
+    'TXT': TXT,
+    'RP': RP,
+    'AFSDB': AFSDB,
+    'X25': X25,
+    'ISDN': ISDN,
+    'RT': RT,
+    'NSAP': NSAP,
+    'NSAP-PTR': NSAP_PTR,
+    'SIG': SIG,
+    'KEY': KEY,
+    'PX': PX,
+    'GPOS': GPOS,
+    'AAAA': AAAA,
+    'LOC': LOC,
+    'NXT': NXT,
+    'SRV': SRV,
+    'NAPTR': NAPTR,
+    'KX': KX,
+    'CERT': CERT,
+    'A6': A6,
+    'DNAME': DNAME,
+    'OPT': OPT,
+    'APL': APL,
+    'DS': DS,
+    'SSHFP': SSHFP,
+    'IPSECKEY': IPSECKEY,
+    'RRSIG': RRSIG,
+    'NSEC': NSEC,
+    'DNSKEY': DNSKEY,
+    'DHCID': DHCID,
+    'NSEC3': NSEC3,
+    'NSEC3PARAM': NSEC3PARAM,
+    'TLSA': TLSA,
+    'HIP': HIP,
+    'CDS': CDS,
+    'CDNSKEY': CDNSKEY,
+    'CSYNC': CSYNC,
+    'SPF': SPF,
+    'UNSPEC': UNSPEC,
+    'EUI48': EUI48,
+    'EUI64': EUI64,
+    'TKEY': TKEY,
+    'TSIG': TSIG,
+    'IXFR': IXFR,
+    'AXFR': AXFR,
+    'MAILB': MAILB,
+    'MAILA': MAILA,
+    'ANY': ANY,
+    'URI': URI,
+    'CAA': CAA,
+    'TA': TA,
+    'DLV': DLV,
+}
+
+# We construct the inverse mapping programmatically to ensure that we
+# cannot make any mistakes (e.g. omissions, cut-and-paste errors) that
+# would cause the mapping not to be true inverse.
+
+_by_value = dict((y, x) for x, y in _by_text.items())
+
+
+_metatypes = {
+    OPT: True
+}
+
+_singletons = {
+    SOA: True,
+    NXT: True,
+    DNAME: True,
+    NSEC: True,
+    # CNAME is technically a singleton, but we allow multiple CNAMEs.
+}
+
+_unknown_type_pattern = re.compile('TYPE([0-9]+)$', re.I)
+
+
+class UnknownRdatatype(dns.exception.DNSException):
+
+    """DNS resource record type is unknown."""
+
+
+def from_text(text):
+    """Convert text into a DNS rdata type value.
+    @param text: the text
+    @type text: string
+    @raises dns.rdatatype.UnknownRdatatype: the type is unknown
+    @raises ValueError: the rdata type value is not >= 0 and <= 65535
+    @rtype: int"""
+
+    value = _by_text.get(text.upper())
+    if value is None:
+        match = _unknown_type_pattern.match(text)
+        if match is None:
+            raise UnknownRdatatype
+        value = int(match.group(1))
+        if value < 0 or value > 65535:
+            raise ValueError("type must be between >= 0 and <= 65535")
+    return value
+
+
+def to_text(value):
+    """Convert a DNS rdata type to text.
+    @param value: the rdata type value
+    @type value: int
+    @raises ValueError: the rdata type value is not >= 0 and <= 65535
+    @rtype: string"""
+
+    if value < 0 or value > 65535:
+        raise ValueError("type must be between >= 0 and <= 65535")
+    text = _by_value.get(value)
+    if text is None:
+        text = 'TYPE' + repr(value)
+    return text
+
+
+def is_metatype(rdtype):
+    """True if the type is a metatype.
+    @param rdtype: the type
+    @type rdtype: int
+    @rtype: bool"""
+
+    if rdtype >= TKEY and rdtype <= ANY or rdtype in _metatypes:
+        return True
+    return False
+
+
+def is_singleton(rdtype):
+    """True if the type is a singleton.
+    @param rdtype: the type
+    @type rdtype: int
+    @rtype: bool"""
+
+    if rdtype in _singletons:
+        return True
+    return False

eventlet/support/dns/rdtypes/ANY/AFSDB.py

@@ -0,0 +1,53 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import dns.rdtypes.mxbase
+
+
+class AFSDB(dns.rdtypes.mxbase.UncompressedDowncasingMX):
+
+    """AFSDB record
+
+    @ivar subtype: the subtype value
+    @type subtype: int
+    @ivar hostname: the hostname name
+    @type hostname: dns.name.Name object"""
+
+    # Use the property mechanism to make "subtype" an alias for the
+    # "preference" attribute, and "hostname" an alias for the "exchange"
+    # attribute.
+    #
+    # This lets us inherit the UncompressedMX implementation but lets
+    # the caller use appropriate attribute names for the rdata type.
+    #
+    # We probably lose some performance vs. a cut-and-paste
+    # implementation, but this way we don't copy code, and that's
+    # good.
+
+    def get_subtype(self):
+        return self.preference
+
+    def set_subtype(self, subtype):
+        self.preference = subtype
+
+    subtype = property(get_subtype, set_subtype)
+
+    def get_hostname(self):
+        return self.exchange
+
+    def set_hostname(self, hostname):
+        self.exchange = hostname
+
+    hostname = property(get_hostname, set_hostname)

eventlet/support/dns/rdtypes/ANY/CAA.py

@@ -0,0 +1,74 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import struct
+
+import dns.exception
+import dns.rdata
+import dns.tokenizer
+
+
+class CAA(dns.rdata.Rdata):
+
+    """CAA (Certification Authority Authorization) record
+
+    @ivar flags: the flags
+    @type flags: int
+    @ivar tag: the tag
+    @type tag: string
+    @ivar value: the value
+    @type value: string
+    @see: RFC 6844"""
+
+    __slots__ = ['flags', 'tag', 'value']
+
+    def __init__(self, rdclass, rdtype, flags, tag, value):
+        super(CAA, self).__init__(rdclass, rdtype)
+        self.flags = flags
+        self.tag = tag
+        self.value = value
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        return '%u %s "%s"' % (self.flags,
+                               dns.rdata._escapify(self.tag),
+                               dns.rdata._escapify(self.value))
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        flags = tok.get_uint8()
+        tag = tok.get_string().encode()
+        if len(tag) > 255:
+            raise dns.exception.SyntaxError("tag too long")
+        if not tag.isalnum():
+            raise dns.exception.SyntaxError("tag is not alphanumeric")
+        value = tok.get_string().encode()
+        return cls(rdclass, rdtype, flags, tag, value)
+
+    def to_wire(self, file, compress=None, origin=None):
+        file.write(struct.pack('!B', self.flags))
+        l = len(self.tag)
+        assert l < 256
+        file.write(struct.pack('!B', l))
+        file.write(self.tag)
+        file.write(self.value)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        (flags, l) = struct.unpack('!BB', wire[current: current + 2])
+        current += 2
+        tag = wire[current: current + l]
+        value = wire[current + l:current + rdlen - 2]
+        return cls(rdclass, rdtype, flags, tag, value)
+

eventlet/support/dns/rdtypes/ANY/CDNSKEY.py

@@ -0,0 +1,25 @@
+# Copyright (C) 2004-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import dns.rdtypes.dnskeybase
+from dns.rdtypes.dnskeybase import flags_to_text_set, flags_from_text_set
+
+
+__all__ = ['flags_to_text_set', 'flags_from_text_set']
+
+
+class CDNSKEY(dns.rdtypes.dnskeybase.DNSKEYBase):
+
+    """CDNSKEY record"""

eventlet/support/dns/rdtypes/ANY/CDS.py

@@ -0,0 +1,21 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import dns.rdtypes.dsbase
+
+
+class CDS(dns.rdtypes.dsbase.DSBase):
+
+    """CDS record"""

eventlet/support/dns/rdtypes/ANY/CERT.py

@@ -0,0 +1,122 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import struct
+import base64
+
+import dns.exception
+import dns.dnssec
+import dns.rdata
+import dns.tokenizer
+
+_ctype_by_value = {
+    1: 'PKIX',
+    2: 'SPKI',
+    3: 'PGP',
+    253: 'URI',
+    254: 'OID',
+}
+
+_ctype_by_name = {
+    'PKIX': 1,
+    'SPKI': 2,
+    'PGP': 3,
+    'URI': 253,
+    'OID': 254,
+}
+
+
+def _ctype_from_text(what):
+    v = _ctype_by_name.get(what)
+    if v is not None:
+        return v
+    return int(what)
+
+
+def _ctype_to_text(what):
+    v = _ctype_by_value.get(what)
+    if v is not None:
+        return v
+    return str(what)
+
+
+class CERT(dns.rdata.Rdata):
+
+    """CERT record
+
+    @ivar certificate_type: certificate type
+    @type certificate_type: int
+    @ivar key_tag: key tag
+    @type key_tag: int
+    @ivar algorithm: algorithm
+    @type algorithm: int
+    @ivar certificate: the certificate or CRL
+    @type certificate: string
+    @see: RFC 2538"""
+
+    __slots__ = ['certificate_type', 'key_tag', 'algorithm', 'certificate']
+
+    def __init__(self, rdclass, rdtype, certificate_type, key_tag, algorithm,
+                 certificate):
+        super(CERT, self).__init__(rdclass, rdtype)
+        self.certificate_type = certificate_type
+        self.key_tag = key_tag
+        self.algorithm = algorithm
+        self.certificate = certificate
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        certificate_type = _ctype_to_text(self.certificate_type)
+        return "%s %d %s %s" % (certificate_type, self.key_tag,
+                                dns.dnssec.algorithm_to_text(self.algorithm),
+                                dns.rdata._base64ify(self.certificate))
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        certificate_type = _ctype_from_text(tok.get_string())
+        key_tag = tok.get_uint16()
+        algorithm = dns.dnssec.algorithm_from_text(tok.get_string())
+        if algorithm < 0 or algorithm > 255:
+            raise dns.exception.SyntaxError("bad algorithm type")
+        chunks = []
+        while 1:
+            t = tok.get().unescape()
+            if t.is_eol_or_eof():
+                break
+            if not t.is_identifier():
+                raise dns.exception.SyntaxError
+            chunks.append(t.value.encode())
+        b64 = b''.join(chunks)
+        certificate = base64.b64decode(b64)
+        return cls(rdclass, rdtype, certificate_type, key_tag,
+                   algorithm, certificate)
+
+    def to_wire(self, file, compress=None, origin=None):
+        prefix = struct.pack("!HHB", self.certificate_type, self.key_tag,
+                             self.algorithm)
+        file.write(prefix)
+        file.write(self.certificate)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        prefix = wire[current: current + 5].unwrap()
+        current += 5
+        rdlen -= 5
+        if rdlen < 0:
+            raise dns.exception.FormError
+        (certificate_type, key_tag, algorithm) = struct.unpack("!HHB", prefix)
+        certificate = wire[current: current + rdlen].unwrap()
+        return cls(rdclass, rdtype, certificate_type, key_tag, algorithm,
+                   certificate)
+

eventlet/support/dns/rdtypes/ANY/CNAME.py

@@ -0,0 +1,25 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import dns.rdtypes.nsbase
+
+
+class CNAME(dns.rdtypes.nsbase.NSBase):
+
+    """CNAME record
+
+    Note: although CNAME is officially a singleton type, dnspython allows
+    non-singleton CNAME rdatasets because such sets have been commonly
+    used by BIND and other nameservers for load balancing."""

eventlet/support/dns/rdtypes/ANY/CSYNC.py

@@ -0,0 +1,124 @@
+# Copyright (C) 2004-2007, 2009-2011, 2016 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import struct
+
+import dns.exception
+import dns.rdata
+import dns.rdatatype
+import dns.name
+from dns._compat import xrange
+
+class CSYNC(dns.rdata.Rdata):
+
+    """CSYNC record
+
+    @ivar serial: the SOA serial number
+    @type serial: int
+    @ivar flags: the CSYNC flags
+    @type flags: int
+    @ivar windows: the windowed bitmap list
+    @type windows: list of (window number, string) tuples"""
+
+    __slots__ = ['serial', 'flags', 'windows']
+
+    def __init__(self, rdclass, rdtype, serial, flags, windows):
+        super(CSYNC, self).__init__(rdclass, rdtype)
+        self.serial = serial
+        self.flags = flags
+        self.windows = windows
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        text = ''
+        for (window, bitmap) in self.windows:
+            bits = []
+            for i in xrange(0, len(bitmap)):
+                byte = bitmap[i]
+                for j in xrange(0, 8):
+                    if byte & (0x80 >> j):
+                        bits.append(dns.rdatatype.to_text(window * 256 +
+                                                          i * 8 + j))
+            text += (' ' + ' '.join(bits))
+        return '%d %d%s' % (self.serial, self.flags, text)
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        serial = tok.get_uint32()
+        flags = tok.get_uint16()
+        rdtypes = []
+        while 1:
+            token = tok.get().unescape()
+            if token.is_eol_or_eof():
+                break
+            nrdtype = dns.rdatatype.from_text(token.value)
+            if nrdtype == 0:
+                raise dns.exception.SyntaxError("CSYNC with bit 0")
+            if nrdtype > 65535:
+                raise dns.exception.SyntaxError("CSYNC with bit > 65535")
+            rdtypes.append(nrdtype)
+        rdtypes.sort()
+        window = 0
+        octets = 0
+        prior_rdtype = 0
+        bitmap = bytearray(b'\0' * 32)
+        windows = []
+        for nrdtype in rdtypes:
+            if nrdtype == prior_rdtype:
+                continue
+            prior_rdtype = nrdtype
+            new_window = nrdtype // 256
+            if new_window != window:
+                windows.append((window, bitmap[0:octets]))
+                bitmap = bytearray(b'\0' * 32)
+                window = new_window
+            offset = nrdtype % 256
+            byte = offset // 8
+            bit = offset % 8
+            octets = byte + 1
+            bitmap[byte] = bitmap[byte] | (0x80 >> bit)
+
+        windows.append((window, bitmap[0:octets]))
+        return cls(rdclass, rdtype, serial, flags, windows)
+
+    def to_wire(self, file, compress=None, origin=None):
+        file.write(struct.pack('!IH', self.serial, self.flags))
+        for (window, bitmap) in self.windows:
+            file.write(struct.pack('!BB', window, len(bitmap)))
+            file.write(bitmap)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        if rdlen < 6:
+            raise dns.exception.FormError("CSYNC too short")
+        (serial, flags) = struct.unpack("!IH", wire[current: current + 6])
+        current += 6
+        rdlen -= 6
+        windows = []
+        while rdlen > 0:
+            if rdlen < 3:
+                raise dns.exception.FormError("CSYNC too short")
+            window = wire[current]
+            octets = wire[current + 1]
+            if octets == 0 or octets > 32:
+                raise dns.exception.FormError("bad CSYNC octets")
+            current += 2
+            rdlen -= 2
+            if rdlen < octets:
+                raise dns.exception.FormError("bad CSYNC bitmap length")
+            bitmap = bytearray(wire[current: current + octets].unwrap())
+            current += octets
+            rdlen -= octets
+            windows.append((window, bitmap))
+        return cls(rdclass, rdtype, serial, flags, windows)

eventlet/support/dns/rdtypes/ANY/DLV.py

@@ -0,0 +1,21 @@
+# Copyright (C) 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import dns.rdtypes.dsbase
+
+
+class DLV(dns.rdtypes.dsbase.DSBase):
+
+    """DLV record"""

eventlet/support/dns/rdtypes/ANY/DNAME.py

@@ -0,0 +1,24 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import dns.rdtypes.nsbase
+
+
+class DNAME(dns.rdtypes.nsbase.UncompressedNS):
+
+    """DNAME record"""
+
+    def to_digestable(self, origin=None):
+        return self.target.to_digestable(origin)

eventlet/support/dns/rdtypes/ANY/DNSKEY.py

@@ -0,0 +1,25 @@
+# Copyright (C) 2004-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import dns.rdtypes.dnskeybase
+from dns.rdtypes.dnskeybase import flags_to_text_set, flags_from_text_set
+
+
+__all__ = ['flags_to_text_set', 'flags_from_text_set']
+
+
+class DNSKEY(dns.rdtypes.dnskeybase.DNSKEYBase):
+
+    """DNSKEY record"""

eventlet/support/dns/rdtypes/ANY/DS.py

@@ -0,0 +1,21 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import dns.rdtypes.dsbase
+
+
+class DS(dns.rdtypes.dsbase.DSBase):
+
+    """DS record"""

eventlet/support/dns/rdtypes/ANY/EUI48.py

@@ -0,0 +1,29 @@
+# Copyright (C) 2015 Red Hat, Inc.
+# Author: Petr Spacek <pspacek@redhat.com>
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED 'AS IS' AND RED HAT DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import dns.rdtypes.euibase
+
+
+class EUI48(dns.rdtypes.euibase.EUIBase):
+
+    """EUI48 record
+
+    @ivar fingerprint: 48-bit Extended Unique Identifier (EUI-48)
+    @type fingerprint: string
+    @see: rfc7043.txt"""
+
+    byte_len = 6  # 0123456789ab (in hex)
+    text_len = byte_len * 3 - 1  # 01-23-45-67-89-ab

eventlet/support/dns/rdtypes/ANY/EUI64.py

@@ -0,0 +1,29 @@
+# Copyright (C) 2015 Red Hat, Inc.
+# Author: Petr Spacek <pspacek@redhat.com>
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED 'AS IS' AND RED HAT DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import dns.rdtypes.euibase
+
+
+class EUI64(dns.rdtypes.euibase.EUIBase):
+
+    """EUI64 record
+
+    @ivar fingerprint: 64-bit Extended Unique Identifier (EUI-64)
+    @type fingerprint: string
+    @see: rfc7043.txt"""
+
+    byte_len = 8  # 0123456789abcdef (in hex)
+    text_len = byte_len * 3 - 1  # 01-23-45-67-89-ab-cd-ef

eventlet/support/dns/rdtypes/ANY/GPOS.py

@@ -0,0 +1,160 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import struct
+
+import dns.exception
+import dns.rdata
+import dns.tokenizer
+from dns._compat import long, text_type
+
+
+def _validate_float_string(what):
+    if what[0] == b'-'[0] or what[0] == b'+'[0]:
+        what = what[1:]
+    if what.isdigit():
+        return
+    (left, right) = what.split(b'.')
+    if left == b'' and right == b'':
+        raise dns.exception.FormError
+    if not left == b'' and not left.decode().isdigit():
+        raise dns.exception.FormError
+    if not right == b'' and not right.decode().isdigit():
+        raise dns.exception.FormError
+
+
+def _sanitize(value):
+    if isinstance(value, text_type):
+        return value.encode()
+    return value
+
+
+class GPOS(dns.rdata.Rdata):
+
+    """GPOS record
+
+    @ivar latitude: latitude
+    @type latitude: string
+    @ivar longitude: longitude
+    @type longitude: string
+    @ivar altitude: altitude
+    @type altitude: string
+    @see: RFC 1712"""
+
+    __slots__ = ['latitude', 'longitude', 'altitude']
+
+    def __init__(self, rdclass, rdtype, latitude, longitude, altitude):
+        super(GPOS, self).__init__(rdclass, rdtype)
+        if isinstance(latitude, float) or \
+           isinstance(latitude, int) or \
+           isinstance(latitude, long):
+            latitude = str(latitude)
+        if isinstance(longitude, float) or \
+           isinstance(longitude, int) or \
+           isinstance(longitude, long):
+            longitude = str(longitude)
+        if isinstance(altitude, float) or \
+           isinstance(altitude, int) or \
+           isinstance(altitude, long):
+            altitude = str(altitude)
+        latitude = _sanitize(latitude)
+        longitude = _sanitize(longitude)
+        altitude = _sanitize(altitude)
+        _validate_float_string(latitude)
+        _validate_float_string(longitude)
+        _validate_float_string(altitude)
+        self.latitude = latitude
+        self.longitude = longitude
+        self.altitude = altitude
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        return '%s %s %s' % (self.latitude.decode(),
+                             self.longitude.decode(),
+                             self.altitude.decode())
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        latitude = tok.get_string()
+        longitude = tok.get_string()
+        altitude = tok.get_string()
+        tok.get_eol()
+        return cls(rdclass, rdtype, latitude, longitude, altitude)
+
+    def to_wire(self, file, compress=None, origin=None):
+        l = len(self.latitude)
+        assert l < 256
+        file.write(struct.pack('!B', l))
+        file.write(self.latitude)
+        l = len(self.longitude)
+        assert l < 256
+        file.write(struct.pack('!B', l))
+        file.write(self.longitude)
+        l = len(self.altitude)
+        assert l < 256
+        file.write(struct.pack('!B', l))
+        file.write(self.altitude)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        l = wire[current]
+        current += 1
+        rdlen -= 1
+        if l > rdlen:
+            raise dns.exception.FormError
+        latitude = wire[current: current + l].unwrap()
+        current += l
+        rdlen -= l
+        l = wire[current]
+        current += 1
+        rdlen -= 1
+        if l > rdlen:
+            raise dns.exception.FormError
+        longitude = wire[current: current + l].unwrap()
+        current += l
+        rdlen -= l
+        l = wire[current]
+        current += 1
+        rdlen -= 1
+        if l != rdlen:
+            raise dns.exception.FormError
+        altitude = wire[current: current + l].unwrap()
+        return cls(rdclass, rdtype, latitude, longitude, altitude)
+
+    def _get_float_latitude(self):
+        return float(self.latitude)
+
+    def _set_float_latitude(self, value):
+        self.latitude = str(value)
+
+    float_latitude = property(_get_float_latitude, _set_float_latitude,
+                              doc="latitude as a floating point value")
+
+    def _get_float_longitude(self):
+        return float(self.longitude)
+
+    def _set_float_longitude(self, value):
+        self.longitude = str(value)
+
+    float_longitude = property(_get_float_longitude, _set_float_longitude,
+                               doc="longitude as a floating point value")
+
+    def _get_float_altitude(self):
+        return float(self.altitude)
+
+    def _set_float_altitude(self, value):
+        self.altitude = str(value)
+
+    float_altitude = property(_get_float_altitude, _set_float_altitude,
+                              doc="altitude as a floating point value")

eventlet/support/dns/rdtypes/ANY/HINFO.py

@@ -0,0 +1,85 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import struct
+
+import dns.exception
+import dns.rdata
+import dns.tokenizer
+from dns._compat import text_type
+
+
+class HINFO(dns.rdata.Rdata):
+
+    """HINFO record
+
+    @ivar cpu: the CPU type
+    @type cpu: string
+    @ivar os: the OS type
+    @type os: string
+    @see: RFC 1035"""
+
+    __slots__ = ['cpu', 'os']
+
+    def __init__(self, rdclass, rdtype, cpu, os):
+        super(HINFO, self).__init__(rdclass, rdtype)
+        if isinstance(cpu, text_type):
+            self.cpu = cpu.encode()
+        else:
+            self.cpu = cpu
+        if isinstance(os, text_type):
+            self.os = os.encode()
+        else:
+            self.os = os
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        return '"%s" "%s"' % (dns.rdata._escapify(self.cpu),
+                              dns.rdata._escapify(self.os))
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        cpu = tok.get_string()
+        os = tok.get_string()
+        tok.get_eol()
+        return cls(rdclass, rdtype, cpu, os)
+
+    def to_wire(self, file, compress=None, origin=None):
+        l = len(self.cpu)
+        assert l < 256
+        file.write(struct.pack('!B', l))
+        file.write(self.cpu)
+        l = len(self.os)
+        assert l < 256
+        file.write(struct.pack('!B', l))
+        file.write(self.os)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        l = wire[current]
+        current += 1
+        rdlen -= 1
+        if l > rdlen:
+            raise dns.exception.FormError
+        cpu = wire[current:current + l].unwrap()
+        current += l
+        rdlen -= l
+        l = wire[current]
+        current += 1
+        rdlen -= 1
+        if l != rdlen:
+            raise dns.exception.FormError
+        os = wire[current: current + l].unwrap()
+        return cls(rdclass, rdtype, cpu, os)
+

eventlet/support/dns/rdtypes/ANY/HIP.py

@@ -0,0 +1,113 @@
+# Copyright (C) 2010, 2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import struct
+import base64
+import binascii
+
+import dns.exception
+import dns.rdata
+import dns.rdatatype
+
+
+class HIP(dns.rdata.Rdata):
+
+    """HIP record
+
+    @ivar hit: the host identity tag
+    @type hit: string
+    @ivar algorithm: the public key cryptographic algorithm
+    @type algorithm: int
+    @ivar key: the public key
+    @type key: string
+    @ivar servers: the rendezvous servers
+    @type servers: list of dns.name.Name objects
+    @see: RFC 5205"""
+
+    __slots__ = ['hit', 'algorithm', 'key', 'servers']
+
+    def __init__(self, rdclass, rdtype, hit, algorithm, key, servers):
+        super(HIP, self).__init__(rdclass, rdtype)
+        self.hit = hit
+        self.algorithm = algorithm
+        self.key = key
+        self.servers = servers
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        hit = binascii.hexlify(self.hit).decode()
+        key = base64.b64encode(self.key).replace(b'\n', b'').decode()
+        text = u''
+        servers = []
+        for server in self.servers:
+            servers.append(server.choose_relativity(origin, relativize))
+        if len(servers) > 0:
+            text += (u' ' + u' '.join((x.to_unicode() for x in servers)))
+        return u'%u %s %s%s' % (self.algorithm, hit, key, text)
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        algorithm = tok.get_uint8()
+        hit = binascii.unhexlify(tok.get_string().encode())
+        if len(hit) > 255:
+            raise dns.exception.SyntaxError("HIT too long")
+        key = base64.b64decode(tok.get_string().encode())
+        servers = []
+        while 1:
+            token = tok.get()
+            if token.is_eol_or_eof():
+                break
+            server = dns.name.from_text(token.value, origin)
+            server.choose_relativity(origin, relativize)
+            servers.append(server)
+        return cls(rdclass, rdtype, hit, algorithm, key, servers)
+
+    def to_wire(self, file, compress=None, origin=None):
+        lh = len(self.hit)
+        lk = len(self.key)
+        file.write(struct.pack("!BBH", lh, self.algorithm, lk))
+        file.write(self.hit)
+        file.write(self.key)
+        for server in self.servers:
+            server.to_wire(file, None, origin)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        (lh, algorithm, lk) = struct.unpack('!BBH',
+                                            wire[current: current + 4])
+        current += 4
+        rdlen -= 4
+        hit = wire[current: current + lh].unwrap()
+        current += lh
+        rdlen -= lh
+        key = wire[current: current + lk].unwrap()
+        current += lk
+        rdlen -= lk
+        servers = []
+        while rdlen > 0:
+            (server, cused) = dns.name.from_wire(wire[: current + rdlen],
+                                                 current)
+            current += cused
+            rdlen -= cused
+            if origin is not None:
+                server = server.relativize(origin)
+            servers.append(server)
+        return cls(rdclass, rdtype, hit, algorithm, key, servers)
+
+    def choose_relativity(self, origin=None, relativize=True):
+        servers = []
+        for server in self.servers:
+            server = server.choose_relativity(origin, relativize)
+            servers.append(server)
+        self.servers = servers

eventlet/support/dns/rdtypes/ANY/ISDN.py

@@ -0,0 +1,98 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import struct
+
+import dns.exception
+import dns.rdata
+import dns.tokenizer
+from dns._compat import text_type
+
+
+class ISDN(dns.rdata.Rdata):
+
+    """ISDN record
+
+    @ivar address: the ISDN address
+    @type address: string
+    @ivar subaddress: the ISDN subaddress (or '' if not present)
+    @type subaddress: string
+    @see: RFC 1183"""
+
+    __slots__ = ['address', 'subaddress']
+
+    def __init__(self, rdclass, rdtype, address, subaddress):
+        super(ISDN, self).__init__(rdclass, rdtype)
+        if isinstance(address, text_type):
+            self.address = address.encode()
+        else:
+            self.address = address
+        if isinstance(address, text_type):
+            self.subaddress = subaddress.encode()
+        else:
+            self.subaddress = subaddress
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        if self.subaddress:
+            return '"%s" "%s"' % (dns.rdata._escapify(self.address),
+                                  dns.rdata._escapify(self.subaddress))
+        else:
+            return '"%s"' % dns.rdata._escapify(self.address)
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        address = tok.get_string()
+        t = tok.get()
+        if not t.is_eol_or_eof():
+            tok.unget(t)
+            subaddress = tok.get_string()
+        else:
+            tok.unget(t)
+            subaddress = ''
+        tok.get_eol()
+        return cls(rdclass, rdtype, address, subaddress)
+
+    def to_wire(self, file, compress=None, origin=None):
+        l = len(self.address)
+        assert l < 256
+        file.write(struct.pack('!B', l))
+        file.write(self.address)
+        l = len(self.subaddress)
+        if l > 0:
+            assert l < 256
+            file.write(struct.pack('!B', l))
+            file.write(self.subaddress)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        l = wire[current]
+        current += 1
+        rdlen -= 1
+        if l > rdlen:
+            raise dns.exception.FormError
+        address = wire[current: current + l].unwrap()
+        current += l
+        rdlen -= l
+        if rdlen > 0:
+            l = wire[current]
+            current += 1
+            rdlen -= 1
+            if l != rdlen:
+                raise dns.exception.FormError
+            subaddress = wire[current: current + l].unwrap()
+        else:
+            subaddress = ''
+        return cls(rdclass, rdtype, address, subaddress)
+

eventlet/support/dns/rdtypes/ANY/LOC.py

@@ -0,0 +1,329 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+from __future__ import division
+
+import struct
+
+import dns.exception
+import dns.rdata
+from dns._compat import long, xrange, round_py2_compat
+
+
+_pows = tuple(long(10**i) for i in range(0, 11))
+
+# default values are in centimeters
+_default_size = 100.0
+_default_hprec = 1000000.0
+_default_vprec = 1000.0
+
+
+def _exponent_of(what, desc):
+    if what == 0:
+        return 0
+    exp = None
+    for i in xrange(len(_pows)):
+        if what // _pows[i] == long(0):
+            exp = i - 1
+            break
+    if exp is None or exp < 0:
+        raise dns.exception.SyntaxError("%s value out of bounds" % desc)
+    return exp
+
+
+def _float_to_tuple(what):
+    if what < 0:
+        sign = -1
+        what *= -1
+    else:
+        sign = 1
+    what = round_py2_compat(what * 3600000)
+    degrees = int(what // 3600000)
+    what -= degrees * 3600000
+    minutes = int(what // 60000)
+    what -= minutes * 60000
+    seconds = int(what // 1000)
+    what -= int(seconds * 1000)
+    what = int(what)
+    return (degrees, minutes, seconds, what, sign)
+
+
+def _tuple_to_float(what):
+    value = float(what[0])
+    value += float(what[1]) / 60.0
+    value += float(what[2]) / 3600.0
+    value += float(what[3]) / 3600000.0
+    return float(what[4]) * value
+
+
+def _encode_size(what, desc):
+    what = long(what)
+    exponent = _exponent_of(what, desc) & 0xF
+    base = what // pow(10, exponent) & 0xF
+    return base * 16 + exponent
+
+
+def _decode_size(what, desc):
+    exponent = what & 0x0F
+    if exponent > 9:
+        raise dns.exception.SyntaxError("bad %s exponent" % desc)
+    base = (what & 0xF0) >> 4
+    if base > 9:
+        raise dns.exception.SyntaxError("bad %s base" % desc)
+    return long(base) * pow(10, exponent)
+
+
+class LOC(dns.rdata.Rdata):
+
+    """LOC record
+
+    @ivar latitude: latitude
+    @type latitude: (int, int, int, int, sign) tuple specifying the degrees, minutes,
+    seconds, milliseconds, and sign of the coordinate.
+    @ivar longitude: longitude
+    @type longitude: (int, int, int, int, sign) tuple specifying the degrees,
+    minutes, seconds, milliseconds, and sign of the coordinate.
+    @ivar altitude: altitude
+    @type altitude: float
+    @ivar size: size of the sphere
+    @type size: float
+    @ivar horizontal_precision: horizontal precision
+    @type horizontal_precision: float
+    @ivar vertical_precision: vertical precision
+    @type vertical_precision: float
+    @see: RFC 1876"""
+
+    __slots__ = ['latitude', 'longitude', 'altitude', 'size',
+                 'horizontal_precision', 'vertical_precision']
+
+    def __init__(self, rdclass, rdtype, latitude, longitude, altitude,
+                 size=_default_size, hprec=_default_hprec,
+                 vprec=_default_vprec):
+        """Initialize a LOC record instance.
+
+        The parameters I{latitude} and I{longitude} may be either a 4-tuple
+        of integers specifying (degrees, minutes, seconds, milliseconds),
+        or they may be floating point values specifying the number of
+        degrees. The other parameters are floats. Size, horizontal precision,
+        and vertical precision are specified in centimeters."""
+
+        super(LOC, self).__init__(rdclass, rdtype)
+        if isinstance(latitude, int) or isinstance(latitude, long):
+            latitude = float(latitude)
+        if isinstance(latitude, float):
+            latitude = _float_to_tuple(latitude)
+        self.latitude = latitude
+        if isinstance(longitude, int) or isinstance(longitude, long):
+            longitude = float(longitude)
+        if isinstance(longitude, float):
+            longitude = _float_to_tuple(longitude)
+        self.longitude = longitude
+        self.altitude = float(altitude)
+        self.size = float(size)
+        self.horizontal_precision = float(hprec)
+        self.vertical_precision = float(vprec)
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        if self.latitude[4] > 0:
+            lat_hemisphere = 'N'
+            lat_degrees = self.latitude[0]
+        else:
+            lat_hemisphere = 'S'
+            lat_degrees = -1 * self.latitude[0]
+        if self.longitude[4] > 0:
+            long_hemisphere = 'E'
+            long_degrees = self.longitude[0]
+        else:
+            long_hemisphere = 'W'
+            long_degrees = -1 * self.longitude[0]
+        text = "%d %d %d.%03d %s %d %d %d.%03d %s %0.2fm" % (
+            self.latitude[0], self.latitude[1],
+            self.latitude[2], self.latitude[3], lat_hemisphere,
+            self.longitude[0], self.longitude[1], self.longitude[2],
+            self.longitude[3], long_hemisphere,
+            self.altitude / 100.0
+        )
+
+        # do not print default values
+        if self.size != _default_size or \
+            self.horizontal_precision != _default_hprec or \
+                self.vertical_precision != _default_vprec:
+            text += " %0.2fm %0.2fm %0.2fm" % (
+                self.size / 100.0, self.horizontal_precision / 100.0,
+                self.vertical_precision / 100.0
+            )
+        return text
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        latitude = [0, 0, 0, 0, 1]
+        longitude = [0, 0, 0, 0, 1]
+        size = _default_size
+        hprec = _default_hprec
+        vprec = _default_vprec
+
+        latitude[0] = tok.get_int()
+        t = tok.get_string()
+        if t.isdigit():
+            latitude[1] = int(t)
+            t = tok.get_string()
+            if '.' in t:
+                (seconds, milliseconds) = t.split('.')
+                if not seconds.isdigit():
+                    raise dns.exception.SyntaxError(
+                        'bad latitude seconds value')
+                latitude[2] = int(seconds)
+                if latitude[2] >= 60:
+                    raise dns.exception.SyntaxError('latitude seconds >= 60')
+                l = len(milliseconds)
+                if l == 0 or l > 3 or not milliseconds.isdigit():
+                    raise dns.exception.SyntaxError(
+                        'bad latitude milliseconds value')
+                if l == 1:
+                    m = 100
+                elif l == 2:
+                    m = 10
+                else:
+                    m = 1
+                latitude[3] = m * int(milliseconds)
+                t = tok.get_string()
+            elif t.isdigit():
+                latitude[2] = int(t)
+                t = tok.get_string()
+        if t == 'S':
+            latitude[4] = -1
+        elif t != 'N':
+            raise dns.exception.SyntaxError('bad latitude hemisphere value')
+
+        longitude[0] = tok.get_int()
+        t = tok.get_string()
+        if t.isdigit():
+            longitude[1] = int(t)
+            t = tok.get_string()
+            if '.' in t:
+                (seconds, milliseconds) = t.split('.')
+                if not seconds.isdigit():
+                    raise dns.exception.SyntaxError(
+                        'bad longitude seconds value')
+                longitude[2] = int(seconds)
+                if longitude[2] >= 60:
+                    raise dns.exception.SyntaxError('longitude seconds >= 60')
+                l = len(milliseconds)
+                if l == 0 or l > 3 or not milliseconds.isdigit():
+                    raise dns.exception.SyntaxError(
+                        'bad longitude milliseconds value')
+                if l == 1:
+                    m = 100
+                elif l == 2:
+                    m = 10
+                else:
+                    m = 1
+                longitude[3] = m * int(milliseconds)
+                t = tok.get_string()
+            elif t.isdigit():
+                longitude[2] = int(t)
+                t = tok.get_string()
+        if t == 'W':
+            longitude[4] = -1
+        elif t != 'E':
+            raise dns.exception.SyntaxError('bad longitude hemisphere value')
+
+        t = tok.get_string()
+        if t[-1] == 'm':
+            t = t[0: -1]
+        altitude = float(t) * 100.0        # m -> cm
+
+        token = tok.get().unescape()
+        if not token.is_eol_or_eof():
+            value = token.value
+            if value[-1] == 'm':
+                value = value[0: -1]
+            size = float(value) * 100.0        # m -> cm
+            token = tok.get().unescape()
+            if not token.is_eol_or_eof():
+                value = token.value
+                if value[-1] == 'm':
+                    value = value[0: -1]
+                hprec = float(value) * 100.0        # m -> cm
+                token = tok.get().unescape()
+                if not token.is_eol_or_eof():
+                    value = token.value
+                    if value[-1] == 'm':
+                        value = value[0: -1]
+                    vprec = float(value) * 100.0        # m -> cm
+                    tok.get_eol()
+
+        return cls(rdclass, rdtype, latitude, longitude, altitude,
+                   size, hprec, vprec)
+
+    def to_wire(self, file, compress=None, origin=None):
+        milliseconds = (self.latitude[0] * 3600000 +
+                        self.latitude[1] * 60000 +
+                        self.latitude[2] * 1000 +
+                        self.latitude[3]) * self.latitude[4]
+        latitude = long(0x80000000) + milliseconds
+        milliseconds = (self.longitude[0] * 3600000 +
+                        self.longitude[1] * 60000 +
+                        self.longitude[2] * 1000 +
+                        self.longitude[3]) * self.longitude[4]
+        longitude = long(0x80000000) + milliseconds
+        altitude = long(self.altitude) + long(10000000)
+        size = _encode_size(self.size, "size")
+        hprec = _encode_size(self.horizontal_precision, "horizontal precision")
+        vprec = _encode_size(self.vertical_precision, "vertical precision")
+        wire = struct.pack("!BBBBIII", 0, size, hprec, vprec, latitude,
+                           longitude, altitude)
+        file.write(wire)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        (version, size, hprec, vprec, latitude, longitude, altitude) = \
+            struct.unpack("!BBBBIII", wire[current: current + rdlen])
+        if latitude > long(0x80000000):
+            latitude = float(latitude - long(0x80000000)) / 3600000
+        else:
+            latitude = -1 * float(long(0x80000000) - latitude) / 3600000
+        if latitude < -90.0 or latitude > 90.0:
+            raise dns.exception.FormError("bad latitude")
+        if longitude > long(0x80000000):
+            longitude = float(longitude - long(0x80000000)) / 3600000
+        else:
+            longitude = -1 * float(long(0x80000000) - longitude) / 3600000
+        if longitude < -180.0 or longitude > 180.0:
+            raise dns.exception.FormError("bad longitude")
+        altitude = float(altitude) - 10000000.0
+        size = _decode_size(size, "size")
+        hprec = _decode_size(hprec, "horizontal precision")
+        vprec = _decode_size(vprec, "vertical precision")
+        return cls(rdclass, rdtype, latitude, longitude, altitude,
+                   size, hprec, vprec)
+
+    def _get_float_latitude(self):
+        return _tuple_to_float(self.latitude)
+
+    def _set_float_latitude(self, value):
+        self.latitude = _float_to_tuple(value)
+
+    float_latitude = property(_get_float_latitude, _set_float_latitude,
+                              doc="latitude as a floating point value")
+
+    def _get_float_longitude(self):
+        return _tuple_to_float(self.longitude)
+
+    def _set_float_longitude(self, value):
+        self.longitude = _float_to_tuple(value)
+
+    float_longitude = property(_get_float_longitude, _set_float_longitude,
+                               doc="longitude as a floating point value")

eventlet/support/dns/rdtypes/ANY/MX.py

@@ -0,0 +1,21 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import dns.rdtypes.mxbase
+
+
+class MX(dns.rdtypes.mxbase.MXBase):
+
+    """MX record"""

eventlet/support/dns/rdtypes/ANY/NS.py

@@ -0,0 +1,21 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import dns.rdtypes.nsbase
+
+
+class NS(dns.rdtypes.nsbase.NSBase):
+
+    """NS record"""

eventlet/support/dns/rdtypes/ANY/NSEC.py

@@ -0,0 +1,126 @@
+# Copyright (C) 2004-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import struct
+
+import dns.exception
+import dns.rdata
+import dns.rdatatype
+import dns.name
+from dns._compat import xrange
+
+
+class NSEC(dns.rdata.Rdata):
+
+    """NSEC record
+
+    @ivar next: the next name
+    @type next: dns.name.Name object
+    @ivar windows: the windowed bitmap list
+    @type windows: list of (window number, string) tuples"""
+
+    __slots__ = ['next', 'windows']
+
+    def __init__(self, rdclass, rdtype, next, windows):
+        super(NSEC, self).__init__(rdclass, rdtype)
+        self.next = next
+        self.windows = windows
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        next = self.next.choose_relativity(origin, relativize)
+        text = ''
+        for (window, bitmap) in self.windows:
+            bits = []
+            for i in xrange(0, len(bitmap)):
+                byte = bitmap[i]
+                for j in xrange(0, 8):
+                    if byte & (0x80 >> j):
+                        bits.append(dns.rdatatype.to_text(window * 256 +
+                                                          i * 8 + j))
+            text += (' ' + ' '.join(bits))
+        return '%s%s' % (next, text)
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        next = tok.get_name()
+        next = next.choose_relativity(origin, relativize)
+        rdtypes = []
+        while 1:
+            token = tok.get().unescape()
+            if token.is_eol_or_eof():
+                break
+            nrdtype = dns.rdatatype.from_text(token.value)
+            if nrdtype == 0:
+                raise dns.exception.SyntaxError("NSEC with bit 0")
+            if nrdtype > 65535:
+                raise dns.exception.SyntaxError("NSEC with bit > 65535")
+            rdtypes.append(nrdtype)
+        rdtypes.sort()
+        window = 0
+        octets = 0
+        prior_rdtype = 0
+        bitmap = bytearray(b'\0' * 32)
+        windows = []
+        for nrdtype in rdtypes:
+            if nrdtype == prior_rdtype:
+                continue
+            prior_rdtype = nrdtype
+            new_window = nrdtype // 256
+            if new_window != window:
+                windows.append((window, bitmap[0:octets]))
+                bitmap = bytearray(b'\0' * 32)
+                window = new_window
+            offset = nrdtype % 256
+            byte = offset // 8
+            bit = offset % 8
+            octets = byte + 1
+            bitmap[byte] = bitmap[byte] | (0x80 >> bit)
+
+        windows.append((window, bitmap[0:octets]))
+        return cls(rdclass, rdtype, next, windows)
+
+    def to_wire(self, file, compress=None, origin=None):
+        self.next.to_wire(file, None, origin)
+        for (window, bitmap) in self.windows:
+            file.write(struct.pack('!BB', window, len(bitmap)))
+            file.write(bitmap)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        (next, cused) = dns.name.from_wire(wire[: current + rdlen], current)
+        current += cused
+        rdlen -= cused
+        windows = []
+        while rdlen > 0:
+            if rdlen < 3:
+                raise dns.exception.FormError("NSEC too short")
+            window = wire[current]
+            octets = wire[current + 1]
+            if octets == 0 or octets > 32:
+                raise dns.exception.FormError("bad NSEC octets")
+            current += 2
+            rdlen -= 2
+            if rdlen < octets:
+                raise dns.exception.FormError("bad NSEC bitmap length")
+            bitmap = bytearray(wire[current: current + octets].unwrap())
+            current += octets
+            rdlen -= octets
+            windows.append((window, bitmap))
+        if origin is not None:
+            next = next.relativize(origin)
+        return cls(rdclass, rdtype, next, windows)
+
+    def choose_relativity(self, origin=None, relativize=True):
+        self.next = self.next.choose_relativity(origin, relativize)

eventlet/support/dns/rdtypes/ANY/NSEC3.py

@@ -0,0 +1,192 @@
+# Copyright (C) 2004-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import base64
+import binascii
+import string
+import struct
+
+import dns.exception
+import dns.rdata
+import dns.rdatatype
+from dns._compat import xrange, text_type
+
+try:
+    b32_hex_to_normal = string.maketrans('0123456789ABCDEFGHIJKLMNOPQRSTUV',
+                                         'ABCDEFGHIJKLMNOPQRSTUVWXYZ234567')
+    b32_normal_to_hex = string.maketrans('ABCDEFGHIJKLMNOPQRSTUVWXYZ234567',
+                                         '0123456789ABCDEFGHIJKLMNOPQRSTUV')
+except AttributeError:
+    b32_hex_to_normal = bytes.maketrans(b'0123456789ABCDEFGHIJKLMNOPQRSTUV',
+                                        b'ABCDEFGHIJKLMNOPQRSTUVWXYZ234567')
+    b32_normal_to_hex = bytes.maketrans(b'ABCDEFGHIJKLMNOPQRSTUVWXYZ234567',
+                                        b'0123456789ABCDEFGHIJKLMNOPQRSTUV')
+
+# hash algorithm constants
+SHA1 = 1
+
+# flag constants
+OPTOUT = 1
+
+
+class NSEC3(dns.rdata.Rdata):
+
+    """NSEC3 record
+
+    @ivar algorithm: the hash algorithm number
+    @type algorithm: int
+    @ivar flags: the flags
+    @type flags: int
+    @ivar iterations: the number of iterations
+    @type iterations: int
+    @ivar salt: the salt
+    @type salt: string
+    @ivar next: the next name hash
+    @type next: string
+    @ivar windows: the windowed bitmap list
+    @type windows: list of (window number, string) tuples"""
+
+    __slots__ = ['algorithm', 'flags', 'iterations', 'salt', 'next', 'windows']
+
+    def __init__(self, rdclass, rdtype, algorithm, flags, iterations, salt,
+                 next, windows):
+        super(NSEC3, self).__init__(rdclass, rdtype)
+        self.algorithm = algorithm
+        self.flags = flags
+        self.iterations = iterations
+        if isinstance(salt, text_type):
+            self.salt = salt.encode()
+        else:
+            self.salt = salt
+        self.next = next
+        self.windows = windows
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        next = base64.b32encode(self.next).translate(
+            b32_normal_to_hex).lower().decode()
+        if self.salt == b'':
+            salt = '-'
+        else:
+            salt = binascii.hexlify(self.salt).decode()
+        text = u''
+        for (window, bitmap) in self.windows:
+            bits = []
+            for i in xrange(0, len(bitmap)):
+                byte = bitmap[i]
+                for j in xrange(0, 8):
+                    if byte & (0x80 >> j):
+                        bits.append(dns.rdatatype.to_text(window * 256 +
+                                                          i * 8 + j))
+            text += (u' ' + u' '.join(bits))
+        return u'%u %u %u %s %s%s' % (self.algorithm, self.flags,
+                                      self.iterations, salt, next, text)
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        algorithm = tok.get_uint8()
+        flags = tok.get_uint8()
+        iterations = tok.get_uint16()
+        salt = tok.get_string()
+        if salt == u'-':
+            salt = b''
+        else:
+            salt = binascii.unhexlify(salt.encode('ascii'))
+        next = tok.get_string().encode(
+            'ascii').upper().translate(b32_hex_to_normal)
+        next = base64.b32decode(next)
+        rdtypes = []
+        while 1:
+            token = tok.get().unescape()
+            if token.is_eol_or_eof():
+                break
+            nrdtype = dns.rdatatype.from_text(token.value)
+            if nrdtype == 0:
+                raise dns.exception.SyntaxError("NSEC3 with bit 0")
+            if nrdtype > 65535:
+                raise dns.exception.SyntaxError("NSEC3 with bit > 65535")
+            rdtypes.append(nrdtype)
+        rdtypes.sort()
+        window = 0
+        octets = 0
+        prior_rdtype = 0
+        bitmap = bytearray(b'\0' * 32)
+        windows = []
+        for nrdtype in rdtypes:
+            if nrdtype == prior_rdtype:
+                continue
+            prior_rdtype = nrdtype
+            new_window = nrdtype // 256
+            if new_window != window:
+                if octets != 0:
+                    windows.append((window, ''.join(bitmap[0:octets])))
+                bitmap = bytearray(b'\0' * 32)
+                window = new_window
+            offset = nrdtype % 256
+            byte = offset // 8
+            bit = offset % 8
+            octets = byte + 1
+            bitmap[byte] = bitmap[byte] | (0x80 >> bit)
+        if octets != 0:
+            windows.append((window, bitmap[0:octets]))
+        return cls(rdclass, rdtype, algorithm, flags, iterations, salt, next,
+                   windows)
+
+    def to_wire(self, file, compress=None, origin=None):
+        l = len(self.salt)
+        file.write(struct.pack("!BBHB", self.algorithm, self.flags,
+                               self.iterations, l))
+        file.write(self.salt)
+        l = len(self.next)
+        file.write(struct.pack("!B", l))
+        file.write(self.next)
+        for (window, bitmap) in self.windows:
+            file.write(struct.pack("!BB", window, len(bitmap)))
+            file.write(bitmap)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        (algorithm, flags, iterations, slen) = \
+            struct.unpack('!BBHB', wire[current: current + 5])
+
+        current += 5
+        rdlen -= 5
+        salt = wire[current: current + slen].unwrap()
+        current += slen
+        rdlen -= slen
+        nlen = wire[current]
+        current += 1
+        rdlen -= 1
+        next = wire[current: current + nlen].unwrap()
+        current += nlen
+        rdlen -= nlen
+        windows = []
+        while rdlen > 0:
+            if rdlen < 3:
+                raise dns.exception.FormError("NSEC3 too short")
+            window = wire[current]
+            octets = wire[current + 1]
+            if octets == 0 or octets > 32:
+                raise dns.exception.FormError("bad NSEC3 octets")
+            current += 2
+            rdlen -= 2
+            if rdlen < octets:
+                raise dns.exception.FormError("bad NSEC3 bitmap length")
+            bitmap = bytearray(wire[current: current + octets].unwrap())
+            current += octets
+            rdlen -= octets
+            windows.append((window, bitmap))
+        return cls(rdclass, rdtype, algorithm, flags, iterations, salt, next,
+                   windows)
+

eventlet/support/dns/rdtypes/ANY/NSEC3PARAM.py

@@ -0,0 +1,89 @@
+# Copyright (C) 2004-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import struct
+import binascii
+
+import dns.exception
+import dns.rdata
+from dns._compat import text_type
+
+
+class NSEC3PARAM(dns.rdata.Rdata):
+
+    """NSEC3PARAM record
+
+    @ivar algorithm: the hash algorithm number
+    @type algorithm: int
+    @ivar flags: the flags
+    @type flags: int
+    @ivar iterations: the number of iterations
+    @type iterations: int
+    @ivar salt: the salt
+    @type salt: string"""
+
+    __slots__ = ['algorithm', 'flags', 'iterations', 'salt']
+
+    def __init__(self, rdclass, rdtype, algorithm, flags, iterations, salt):
+        super(NSEC3PARAM, self).__init__(rdclass, rdtype)
+        self.algorithm = algorithm
+        self.flags = flags
+        self.iterations = iterations
+        if isinstance(salt, text_type):
+            self.salt = salt.encode()
+        else:
+            self.salt = salt
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        if self.salt == b'':
+            salt = '-'
+        else:
+            salt = binascii.hexlify(self.salt).decode()
+        return '%u %u %u %s' % (self.algorithm, self.flags, self.iterations,
+                                salt)
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        algorithm = tok.get_uint8()
+        flags = tok.get_uint8()
+        iterations = tok.get_uint16()
+        salt = tok.get_string()
+        if salt == '-':
+            salt = ''
+        else:
+            salt = binascii.unhexlify(salt.encode())
+        tok.get_eol()
+        return cls(rdclass, rdtype, algorithm, flags, iterations, salt)
+
+    def to_wire(self, file, compress=None, origin=None):
+        l = len(self.salt)
+        file.write(struct.pack("!BBHB", self.algorithm, self.flags,
+                               self.iterations, l))
+        file.write(self.salt)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        (algorithm, flags, iterations, slen) = \
+             struct.unpack('!BBHB',
+                           wire[current: current + 5])
+        current += 5
+        rdlen -= 5
+        salt = wire[current: current + slen].unwrap()
+        current += slen
+        rdlen -= slen
+        if rdlen != 0:
+            raise dns.exception.FormError
+        return cls(rdclass, rdtype, algorithm, flags, iterations, salt)
+

eventlet/support/dns/rdtypes/ANY/PTR.py

@@ -0,0 +1,21 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import dns.rdtypes.nsbase
+
+
+class PTR(dns.rdtypes.nsbase.NSBase):
+
+    """PTR record"""

eventlet/support/dns/rdtypes/ANY/RP.py

@@ -0,0 +1,80 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import dns.exception
+import dns.rdata
+import dns.name
+
+
+class RP(dns.rdata.Rdata):
+
+    """RP record
+
+    @ivar mbox: The responsible person's mailbox
+    @type mbox: dns.name.Name object
+    @ivar txt: The owner name of a node with TXT records, or the root name
+    if no TXT records are associated with this RP.
+    @type txt: dns.name.Name object
+    @see: RFC 1183"""
+
+    __slots__ = ['mbox', 'txt']
+
+    def __init__(self, rdclass, rdtype, mbox, txt):
+        super(RP, self).__init__(rdclass, rdtype)
+        self.mbox = mbox
+        self.txt = txt
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        mbox = self.mbox.choose_relativity(origin, relativize)
+        txt = self.txt.choose_relativity(origin, relativize)
+        return "%s %s" % (str(mbox), str(txt))
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        mbox = tok.get_name()
+        txt = tok.get_name()
+        mbox = mbox.choose_relativity(origin, relativize)
+        txt = txt.choose_relativity(origin, relativize)
+        tok.get_eol()
+        return cls(rdclass, rdtype, mbox, txt)
+
+    def to_wire(self, file, compress=None, origin=None):
+        self.mbox.to_wire(file, None, origin)
+        self.txt.to_wire(file, None, origin)
+
+    def to_digestable(self, origin=None):
+        return self.mbox.to_digestable(origin) + \
+            self.txt.to_digestable(origin)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        (mbox, cused) = dns.name.from_wire(wire[: current + rdlen],
+                                           current)
+        current += cused
+        rdlen -= cused
+        if rdlen <= 0:
+            raise dns.exception.FormError
+        (txt, cused) = dns.name.from_wire(wire[: current + rdlen],
+                                          current)
+        if cused != rdlen:
+            raise dns.exception.FormError
+        if origin is not None:
+            mbox = mbox.relativize(origin)
+            txt = txt.relativize(origin)
+        return cls(rdclass, rdtype, mbox, txt)
+
+    def choose_relativity(self, origin=None, relativize=True):
+        self.mbox = self.mbox.choose_relativity(origin, relativize)
+        self.txt = self.txt.choose_relativity(origin, relativize)

eventlet/support/dns/rdtypes/ANY/RRSIG.py

@@ -0,0 +1,156 @@
+# Copyright (C) 2004-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import base64
+import calendar
+import struct
+import time
+
+import dns.dnssec
+import dns.exception
+import dns.rdata
+import dns.rdatatype
+
+
+class BadSigTime(dns.exception.DNSException):
+
+    """Time in DNS SIG or RRSIG resource record cannot be parsed."""
+
+
+def sigtime_to_posixtime(what):
+    if len(what) != 14:
+        raise BadSigTime
+    year = int(what[0:4])
+    month = int(what[4:6])
+    day = int(what[6:8])
+    hour = int(what[8:10])
+    minute = int(what[10:12])
+    second = int(what[12:14])
+    return calendar.timegm((year, month, day, hour, minute, second,
+                            0, 0, 0))
+
+
+def posixtime_to_sigtime(what):
+    return time.strftime('%Y%m%d%H%M%S', time.gmtime(what))
+
+
+class RRSIG(dns.rdata.Rdata):
+
+    """RRSIG record
+
+    @ivar type_covered: the rdata type this signature covers
+    @type type_covered: int
+    @ivar algorithm: the algorithm used for the sig
+    @type algorithm: int
+    @ivar labels: number of labels
+    @type labels: int
+    @ivar original_ttl: the original TTL
+    @type original_ttl: long
+    @ivar expiration: signature expiration time
+    @type expiration: long
+    @ivar inception: signature inception time
+    @type inception: long
+    @ivar key_tag: the key tag
+    @type key_tag: int
+    @ivar signer: the signer
+    @type signer: dns.name.Name object
+    @ivar signature: the signature
+    @type signature: string"""
+
+    __slots__ = ['type_covered', 'algorithm', 'labels', 'original_ttl',
+                 'expiration', 'inception', 'key_tag', 'signer',
+                 'signature']
+
+    def __init__(self, rdclass, rdtype, type_covered, algorithm, labels,
+                 original_ttl, expiration, inception, key_tag, signer,
+                 signature):
+        super(RRSIG, self).__init__(rdclass, rdtype)
+        self.type_covered = type_covered
+        self.algorithm = algorithm
+        self.labels = labels
+        self.original_ttl = original_ttl
+        self.expiration = expiration
+        self.inception = inception
+        self.key_tag = key_tag
+        self.signer = signer
+        self.signature = signature
+
+    def covers(self):
+        return self.type_covered
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        return '%s %d %d %d %s %s %d %s %s' % (
+            dns.rdatatype.to_text(self.type_covered),
+            self.algorithm,
+            self.labels,
+            self.original_ttl,
+            posixtime_to_sigtime(self.expiration),
+            posixtime_to_sigtime(self.inception),
+            self.key_tag,
+            self.signer.choose_relativity(origin, relativize),
+            dns.rdata._base64ify(self.signature)
+        )
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        type_covered = dns.rdatatype.from_text(tok.get_string())
+        algorithm = dns.dnssec.algorithm_from_text(tok.get_string())
+        labels = tok.get_int()
+        original_ttl = tok.get_ttl()
+        expiration = sigtime_to_posixtime(tok.get_string())
+        inception = sigtime_to_posixtime(tok.get_string())
+        key_tag = tok.get_int()
+        signer = tok.get_name()
+        signer = signer.choose_relativity(origin, relativize)
+        chunks = []
+        while 1:
+            t = tok.get().unescape()
+            if t.is_eol_or_eof():
+                break
+            if not t.is_identifier():
+                raise dns.exception.SyntaxError
+            chunks.append(t.value.encode())
+        b64 = b''.join(chunks)
+        signature = base64.b64decode(b64)
+        return cls(rdclass, rdtype, type_covered, algorithm, labels,
+                   original_ttl, expiration, inception, key_tag, signer,
+                   signature)
+
+    def to_wire(self, file, compress=None, origin=None):
+        header = struct.pack('!HBBIIIH', self.type_covered,
+                             self.algorithm, self.labels,
+                             self.original_ttl, self.expiration,
+                             self.inception, self.key_tag)
+        file.write(header)
+        self.signer.to_wire(file, None, origin)
+        file.write(self.signature)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        header = struct.unpack('!HBBIIIH', wire[current: current + 18])
+        current += 18
+        rdlen -= 18
+        (signer, cused) = dns.name.from_wire(wire[: current + rdlen], current)
+        current += cused
+        rdlen -= cused
+        if origin is not None:
+            signer = signer.relativize(origin)
+        signature = wire[current: current + rdlen].unwrap()
+        return cls(rdclass, rdtype, header[0], header[1], header[2],
+                   header[3], header[4], header[5], header[6], signer,
+                   signature)
+
+    def choose_relativity(self, origin=None, relativize=True):
+        self.signer = self.signer.choose_relativity(origin, relativize)

eventlet/support/dns/rdtypes/ANY/RT.py

@@ -0,0 +1,21 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import dns.rdtypes.mxbase
+
+
+class RT(dns.rdtypes.mxbase.UncompressedDowncasingMX):
+
+    """RT record"""

eventlet/support/dns/rdtypes/ANY/SOA.py

@@ -0,0 +1,114 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import struct
+
+import dns.exception
+import dns.rdata
+import dns.name
+
+
+class SOA(dns.rdata.Rdata):
+
+    """SOA record
+
+    @ivar mname: the SOA MNAME (master name) field
+    @type mname: dns.name.Name object
+    @ivar rname: the SOA RNAME (responsible name) field
+    @type rname: dns.name.Name object
+    @ivar serial: The zone's serial number
+    @type serial: int
+    @ivar refresh: The zone's refresh value (in seconds)
+    @type refresh: int
+    @ivar retry: The zone's retry value (in seconds)
+    @type retry: int
+    @ivar expire: The zone's expiration value (in seconds)
+    @type expire: int
+    @ivar minimum: The zone's negative caching time (in seconds, called
+    "minimum" for historical reasons)
+    @type minimum: int
+    @see: RFC 1035"""
+
+    __slots__ = ['mname', 'rname', 'serial', 'refresh', 'retry', 'expire',
+                 'minimum']
+
+    def __init__(self, rdclass, rdtype, mname, rname, serial, refresh, retry,
+                 expire, minimum):
+        super(SOA, self).__init__(rdclass, rdtype)
+        self.mname = mname
+        self.rname = rname
+        self.serial = serial
+        self.refresh = refresh
+        self.retry = retry
+        self.expire = expire
+        self.minimum = minimum
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        mname = self.mname.choose_relativity(origin, relativize)
+        rname = self.rname.choose_relativity(origin, relativize)
+        return '%s %s %d %d %d %d %d' % (
+            mname, rname, self.serial, self.refresh, self.retry,
+            self.expire, self.minimum)
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        mname = tok.get_name()
+        rname = tok.get_name()
+        mname = mname.choose_relativity(origin, relativize)
+        rname = rname.choose_relativity(origin, relativize)
+        serial = tok.get_uint32()
+        refresh = tok.get_ttl()
+        retry = tok.get_ttl()
+        expire = tok.get_ttl()
+        minimum = tok.get_ttl()
+        tok.get_eol()
+        return cls(rdclass, rdtype, mname, rname, serial, refresh, retry,
+                   expire, minimum)
+
+    def to_wire(self, file, compress=None, origin=None):
+        self.mname.to_wire(file, compress, origin)
+        self.rname.to_wire(file, compress, origin)
+        five_ints = struct.pack('!IIIII', self.serial, self.refresh,
+                                self.retry, self.expire, self.minimum)
+        file.write(five_ints)
+
+    def to_digestable(self, origin=None):
+        return self.mname.to_digestable(origin) + \
+            self.rname.to_digestable(origin) + \
+            struct.pack('!IIIII', self.serial, self.refresh,
+                        self.retry, self.expire, self.minimum)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        (mname, cused) = dns.name.from_wire(wire[: current + rdlen], current)
+        current += cused
+        rdlen -= cused
+        (rname, cused) = dns.name.from_wire(wire[: current + rdlen], current)
+        current += cused
+        rdlen -= cused
+        if rdlen != 20:
+            raise dns.exception.FormError
+        five_ints = struct.unpack('!IIIII',
+                                  wire[current: current + rdlen])
+        if origin is not None:
+            mname = mname.relativize(origin)
+            rname = rname.relativize(origin)
+        return cls(rdclass, rdtype, mname, rname,
+                   five_ints[0], five_ints[1], five_ints[2], five_ints[3],
+                   five_ints[4])
+
+    def choose_relativity(self, origin=None, relativize=True):
+        self.mname = self.mname.choose_relativity(origin, relativize)
+        self.rname = self.rname.choose_relativity(origin, relativize)

eventlet/support/dns/rdtypes/ANY/SPF.py

@@ -0,0 +1,23 @@
+# Copyright (C) 2006, 2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import dns.rdtypes.txtbase
+
+
+class SPF(dns.rdtypes.txtbase.TXTBase):
+
+    """SPF record
+
+    @see: RFC 4408"""

eventlet/support/dns/rdtypes/ANY/SSHFP.py

@@ -0,0 +1,78 @@
+# Copyright (C) 2005-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import struct
+import binascii
+
+import dns.rdata
+import dns.rdatatype
+
+
+class SSHFP(dns.rdata.Rdata):
+
+    """SSHFP record
+
+    @ivar algorithm: the algorithm
+    @type algorithm: int
+    @ivar fp_type: the digest type
+    @type fp_type: int
+    @ivar fingerprint: the fingerprint
+    @type fingerprint: string
+    @see: draft-ietf-secsh-dns-05.txt"""
+
+    __slots__ = ['algorithm', 'fp_type', 'fingerprint']
+
+    def __init__(self, rdclass, rdtype, algorithm, fp_type,
+                 fingerprint):
+        super(SSHFP, self).__init__(rdclass, rdtype)
+        self.algorithm = algorithm
+        self.fp_type = fp_type
+        self.fingerprint = fingerprint
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        return '%d %d %s' % (self.algorithm,
+                             self.fp_type,
+                             dns.rdata._hexify(self.fingerprint,
+                                               chunksize=128))
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        algorithm = tok.get_uint8()
+        fp_type = tok.get_uint8()
+        chunks = []
+        while 1:
+            t = tok.get().unescape()
+            if t.is_eol_or_eof():
+                break
+            if not t.is_identifier():
+                raise dns.exception.SyntaxError
+            chunks.append(t.value.encode())
+        fingerprint = b''.join(chunks)
+        fingerprint = binascii.unhexlify(fingerprint)
+        return cls(rdclass, rdtype, algorithm, fp_type, fingerprint)
+
+    def to_wire(self, file, compress=None, origin=None):
+        header = struct.pack("!BB", self.algorithm, self.fp_type)
+        file.write(header)
+        file.write(self.fingerprint)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        header = struct.unpack("!BB", wire[current: current + 2])
+        current += 2
+        rdlen -= 2
+        fingerprint = wire[current: current + rdlen].unwrap()
+        return cls(rdclass, rdtype, header[0], header[1], fingerprint)
+

eventlet/support/dns/rdtypes/ANY/TLSA.py

@@ -0,0 +1,83 @@
+# Copyright (C) 2005-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import struct
+import binascii
+
+import dns.rdata
+import dns.rdatatype
+
+
+class TLSA(dns.rdata.Rdata):
+
+    """TLSA record
+
+    @ivar usage: The certificate usage
+    @type usage: int
+    @ivar selector: The selector field
+    @type selector: int
+    @ivar mtype: The 'matching type' field
+    @type mtype: int
+    @ivar cert: The 'Certificate Association Data' field
+    @type cert: string
+    @see: RFC 6698"""
+
+    __slots__ = ['usage', 'selector', 'mtype', 'cert']
+
+    def __init__(self, rdclass, rdtype, usage, selector,
+                 mtype, cert):
+        super(TLSA, self).__init__(rdclass, rdtype)
+        self.usage = usage
+        self.selector = selector
+        self.mtype = mtype
+        self.cert = cert
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        return '%d %d %d %s' % (self.usage,
+                                self.selector,
+                                self.mtype,
+                                dns.rdata._hexify(self.cert,
+                                                  chunksize=128))
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        usage = tok.get_uint8()
+        selector = tok.get_uint8()
+        mtype = tok.get_uint8()
+        cert_chunks = []
+        while 1:
+            t = tok.get().unescape()
+            if t.is_eol_or_eof():
+                break
+            if not t.is_identifier():
+                raise dns.exception.SyntaxError
+            cert_chunks.append(t.value.encode())
+        cert = b''.join(cert_chunks)
+        cert = binascii.unhexlify(cert)
+        return cls(rdclass, rdtype, usage, selector, mtype, cert)
+
+    def to_wire(self, file, compress=None, origin=None):
+        header = struct.pack("!BBB", self.usage, self.selector, self.mtype)
+        file.write(header)
+        file.write(self.cert)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        header = struct.unpack("!BBB", wire[current: current + 3])
+        current += 3
+        rdlen -= 3
+        cert = wire[current: current + rdlen].unwrap()
+        return cls(rdclass, rdtype, header[0], header[1], header[2], cert)
+

eventlet/support/dns/rdtypes/ANY/TXT.py

@@ -0,0 +1,21 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import dns.rdtypes.txtbase
+
+
+class TXT(dns.rdtypes.txtbase.TXTBase):
+
+    """TXT record"""

eventlet/support/dns/rdtypes/ANY/URI.py

@@ -0,0 +1,81 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+# Copyright (C) 2015 Red Hat, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import struct
+
+import dns.exception
+import dns.rdata
+import dns.name
+from dns._compat import text_type
+
+
+class URI(dns.rdata.Rdata):
+
+    """URI record
+
+    @ivar priority: the priority
+    @type priority: int
+    @ivar weight: the weight
+    @type weight: int
+    @ivar target: the target host
+    @type target: dns.name.Name object
+    @see: draft-faltstrom-uri-13"""
+
+    __slots__ = ['priority', 'weight', 'target']
+
+    def __init__(self, rdclass, rdtype, priority, weight, target):
+        super(URI, self).__init__(rdclass, rdtype)
+        self.priority = priority
+        self.weight = weight
+        if len(target) < 1:
+            raise dns.exception.SyntaxError("URI target cannot be empty")
+        if isinstance(target, text_type):
+            self.target = target.encode()
+        else:
+            self.target = target
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        return '%d %d "%s"' % (self.priority, self.weight,
+                               self.target.decode())
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        priority = tok.get_uint16()
+        weight = tok.get_uint16()
+        target = tok.get().unescape()
+        if not (target.is_quoted_string() or target.is_identifier()):
+            raise dns.exception.SyntaxError("URI target must be a string")
+        tok.get_eol()
+        return cls(rdclass, rdtype, priority, weight, target.value)
+
+    def to_wire(self, file, compress=None, origin=None):
+        two_ints = struct.pack("!HH", self.priority, self.weight)
+        file.write(two_ints)
+        file.write(self.target)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        if rdlen < 5:
+            raise dns.exception.FormError('URI RR is shorter than 5 octets')
+
+        (priority, weight) = struct.unpack('!HH', wire[current: current + 4])
+        current += 4
+        rdlen -= 4
+        target = wire[current: current + rdlen]
+        current += rdlen
+
+        return cls(rdclass, rdtype, priority, weight, target)
+

eventlet/support/dns/rdtypes/ANY/X25.py

@@ -0,0 +1,65 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import struct
+
+import dns.exception
+import dns.rdata
+import dns.tokenizer
+from dns._compat import text_type
+
+
+class X25(dns.rdata.Rdata):
+
+    """X25 record
+
+    @ivar address: the PSDN address
+    @type address: string
+    @see: RFC 1183"""
+
+    __slots__ = ['address']
+
+    def __init__(self, rdclass, rdtype, address):
+        super(X25, self).__init__(rdclass, rdtype)
+        if isinstance(address, text_type):
+            self.address = address.encode()
+        else:
+            self.address = address
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        return '"%s"' % dns.rdata._escapify(self.address)
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        address = tok.get_string()
+        tok.get_eol()
+        return cls(rdclass, rdtype, address)
+
+    def to_wire(self, file, compress=None, origin=None):
+        l = len(self.address)
+        assert l < 256
+        file.write(struct.pack('!B', l))
+        file.write(self.address)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        l = wire[current]
+        current += 1
+        rdlen -= 1
+        if l != rdlen:
+            raise dns.exception.FormError
+        address = wire[current: current + l].unwrap()
+        return cls(rdclass, rdtype, address)
+

eventlet/support/dns/rdtypes/ANY/__init__.py

@@ -0,0 +1,50 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""Class ANY (generic) rdata type classes."""
+
+__all__ = [
+    'AFSDB',
+    'CDNSKEY',
+    'CDS',
+    'CERT',
+    'CNAME',
+    'DLV',
+    'DNAME',
+    'DNSKEY',
+    'DS',
+    'EUI48',
+    'EUI64',
+    'GPOS',
+    'HINFO',
+    'HIP',
+    'ISDN',
+    'LOC',
+    'MX',
+    'NS',
+    'NSEC',
+    'NSEC3',
+    'NSEC3PARAM',
+    'TLSA',
+    'PTR',
+    'RP',
+    'RRSIG',
+    'RT',
+    'SOA',
+    'SPF',
+    'SSHFP',
+    'TXT',
+    'X25',
+]

eventlet/support/dns/rdtypes/IN/A.py

@@ -0,0 +1,53 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import dns.exception
+import dns.ipv4
+import dns.rdata
+import dns.tokenizer
+
+
+class A(dns.rdata.Rdata):
+
+    """A record.
+
+    @ivar address: an IPv4 address
+    @type address: string (in the standard "dotted quad" format)"""
+
+    __slots__ = ['address']
+
+    def __init__(self, rdclass, rdtype, address):
+        super(A, self).__init__(rdclass, rdtype)
+        # check that it's OK
+        dns.ipv4.inet_aton(address)
+        self.address = address
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        return self.address
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        address = tok.get_identifier()
+        tok.get_eol()
+        return cls(rdclass, rdtype, address)
+
+    def to_wire(self, file, compress=None, origin=None):
+        file.write(dns.ipv4.inet_aton(self.address))
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        address = dns.ipv4.inet_ntoa(wire[current: current + rdlen]).decode()
+        return cls(rdclass, rdtype, address)
+

eventlet/support/dns/rdtypes/IN/AAAA.py

@@ -0,0 +1,54 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import dns.exception
+import dns.inet
+import dns.rdata
+import dns.tokenizer
+
+
+class AAAA(dns.rdata.Rdata):
+
+    """AAAA record.
+
+    @ivar address: an IPv6 address
+    @type address: string (in the standard IPv6 format)"""
+
+    __slots__ = ['address']
+
+    def __init__(self, rdclass, rdtype, address):
+        super(AAAA, self).__init__(rdclass, rdtype)
+        # check that it's OK
+        dns.inet.inet_pton(dns.inet.AF_INET6, address)
+        self.address = address
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        return self.address
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        address = tok.get_identifier()
+        tok.get_eol()
+        return cls(rdclass, rdtype, address)
+
+    def to_wire(self, file, compress=None, origin=None):
+        file.write(dns.inet.inet_pton(dns.inet.AF_INET6, self.address))
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        address = dns.inet.inet_ntop(dns.inet.AF_INET6,
+                                     wire[current: current + rdlen])
+        return cls(rdclass, rdtype, address)
+

eventlet/support/dns/rdtypes/IN/APL.py

@@ -0,0 +1,162 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import struct
+import binascii
+
+import dns.exception
+import dns.inet
+import dns.rdata
+import dns.tokenizer
+from dns._compat import xrange
+
+
+class APLItem(object):
+
+    """An APL list item.
+
+    @ivar family: the address family (IANA address family registry)
+    @type family: int
+    @ivar negation: is this item negated?
+    @type negation: bool
+    @ivar address: the address
+    @type address: string
+    @ivar prefix: the prefix length
+    @type prefix: int
+    """
+
+    __slots__ = ['family', 'negation', 'address', 'prefix']
+
+    def __init__(self, family, negation, address, prefix):
+        self.family = family
+        self.negation = negation
+        self.address = address
+        self.prefix = prefix
+
+    def __str__(self):
+        if self.negation:
+            return "!%d:%s/%s" % (self.family, self.address, self.prefix)
+        else:
+            return "%d:%s/%s" % (self.family, self.address, self.prefix)
+
+    def to_wire(self, file):
+        if self.family == 1:
+            address = dns.inet.inet_pton(dns.inet.AF_INET, self.address)
+        elif self.family == 2:
+            address = dns.inet.inet_pton(dns.inet.AF_INET6, self.address)
+        else:
+            address = binascii.unhexlify(self.address)
+        #
+        # Truncate least significant zero bytes.
+        #
+        last = 0
+        for i in xrange(len(address) - 1, -1, -1):
+            if address[i] != chr(0):
+                last = i + 1
+                break
+        address = address[0: last]
+        l = len(address)
+        assert l < 128
+        if self.negation:
+            l |= 0x80
+        header = struct.pack('!HBB', self.family, self.prefix, l)
+        file.write(header)
+        file.write(address)
+
+
+class APL(dns.rdata.Rdata):
+
+    """APL record.
+
+    @ivar items: a list of APL items
+    @type items: list of APL_Item
+    @see: RFC 3123"""
+
+    __slots__ = ['items']
+
+    def __init__(self, rdclass, rdtype, items):
+        super(APL, self).__init__(rdclass, rdtype)
+        self.items = items
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        return ' '.join(map(str, self.items))
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        items = []
+        while 1:
+            token = tok.get().unescape()
+            if token.is_eol_or_eof():
+                break
+            item = token.value
+            if item[0] == '!':
+                negation = True
+                item = item[1:]
+            else:
+                negation = False
+            (family, rest) = item.split(':', 1)
+            family = int(family)
+            (address, prefix) = rest.split('/', 1)
+            prefix = int(prefix)
+            item = APLItem(family, negation, address, prefix)
+            items.append(item)
+
+        return cls(rdclass, rdtype, items)
+
+    def to_wire(self, file, compress=None, origin=None):
+        for item in self.items:
+            item.to_wire(file)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        items = []
+        while 1:
+            if rdlen == 0:
+                break
+            if rdlen < 4:
+                raise dns.exception.FormError
+            header = struct.unpack('!HBB', wire[current: current + 4])
+            afdlen = header[2]
+            if afdlen > 127:
+                negation = True
+                afdlen -= 128
+            else:
+                negation = False
+            current += 4
+            rdlen -= 4
+            if rdlen < afdlen:
+                raise dns.exception.FormError
+            address = wire[current: current + afdlen].unwrap()
+            l = len(address)
+            if header[0] == 1:
+                if l < 4:
+                    address += '\x00' * (4 - l)
+                address = dns.inet.inet_ntop(dns.inet.AF_INET, address)
+            elif header[0] == 2:
+                if l < 16:
+                    address += '\x00' * (16 - l)
+                address = dns.inet.inet_ntop(dns.inet.AF_INET6, address)
+            else:
+                #
+                # This isn't really right according to the RFC, but it
+                # seems better than throwing an exception
+                #
+                address = address.encode('hex_codec')
+            current += afdlen
+            rdlen -= afdlen
+            item = APLItem(header[0], negation, address, header[1])
+            items.append(item)
+        return cls(rdclass, rdtype, items)
+

eventlet/support/dns/rdtypes/IN/DHCID.py

@@ -0,0 +1,60 @@
+# Copyright (C) 2006, 2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import base64
+
+import dns.exception
+
+
+class DHCID(dns.rdata.Rdata):
+
+    """DHCID record
+
+    @ivar data: the data (the content of the RR is opaque as far as the
+    DNS is concerned)
+    @type data: string
+    @see: RFC 4701"""
+
+    __slots__ = ['data']
+
+    def __init__(self, rdclass, rdtype, data):
+        super(DHCID, self).__init__(rdclass, rdtype)
+        self.data = data
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        return dns.rdata._base64ify(self.data)
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        chunks = []
+        while 1:
+            t = tok.get().unescape()
+            if t.is_eol_or_eof():
+                break
+            if not t.is_identifier():
+                raise dns.exception.SyntaxError
+            chunks.append(t.value.encode())
+        b64 = b''.join(chunks)
+        data = base64.b64decode(b64)
+        return cls(rdclass, rdtype, data)
+
+    def to_wire(self, file, compress=None, origin=None):
+        file.write(self.data)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        data = wire[current: current + rdlen].unwrap()
+        return cls(rdclass, rdtype, data)
+

eventlet/support/dns/rdtypes/IN/IPSECKEY.py

@@ -0,0 +1,149 @@
+# Copyright (C) 2006, 2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import struct
+import base64
+
+import dns.exception
+import dns.inet
+import dns.name
+
+
+class IPSECKEY(dns.rdata.Rdata):
+
+    """IPSECKEY record
+
+    @ivar precedence: the precedence for this key data
+    @type precedence: int
+    @ivar gateway_type: the gateway type
+    @type gateway_type: int
+    @ivar algorithm: the algorithm to use
+    @type algorithm: int
+    @ivar gateway: the public key
+    @type gateway: None, IPv4 address, IPV6 address, or domain name
+    @ivar key: the public key
+    @type key: string
+    @see: RFC 4025"""
+
+    __slots__ = ['precedence', 'gateway_type', 'algorithm', 'gateway', 'key']
+
+    def __init__(self, rdclass, rdtype, precedence, gateway_type, algorithm,
+                 gateway, key):
+        super(IPSECKEY, self).__init__(rdclass, rdtype)
+        if gateway_type == 0:
+            if gateway != '.' and gateway is not None:
+                raise SyntaxError('invalid gateway for gateway type 0')
+            gateway = None
+        elif gateway_type == 1:
+            # check that it's OK
+            dns.inet.inet_pton(dns.inet.AF_INET, gateway)
+        elif gateway_type == 2:
+            # check that it's OK
+            dns.inet.inet_pton(dns.inet.AF_INET6, gateway)
+        elif gateway_type == 3:
+            pass
+        else:
+            raise SyntaxError(
+                'invalid IPSECKEY gateway type: %d' % gateway_type)
+        self.precedence = precedence
+        self.gateway_type = gateway_type
+        self.algorithm = algorithm
+        self.gateway = gateway
+        self.key = key
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        if self.gateway_type == 0:
+            gateway = '.'
+        elif self.gateway_type == 1:
+            gateway = self.gateway
+        elif self.gateway_type == 2:
+            gateway = self.gateway
+        elif self.gateway_type == 3:
+            gateway = str(self.gateway.choose_relativity(origin, relativize))
+        else:
+            raise ValueError('invalid gateway type')
+        return '%d %d %d %s %s' % (self.precedence, self.gateway_type,
+                                   self.algorithm, gateway,
+                                   dns.rdata._base64ify(self.key))
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        precedence = tok.get_uint8()
+        gateway_type = tok.get_uint8()
+        algorithm = tok.get_uint8()
+        if gateway_type == 3:
+            gateway = tok.get_name().choose_relativity(origin, relativize)
+        else:
+            gateway = tok.get_string()
+        chunks = []
+        while 1:
+            t = tok.get().unescape()
+            if t.is_eol_or_eof():
+                break
+            if not t.is_identifier():
+                raise dns.exception.SyntaxError
+            chunks.append(t.value.encode())
+        b64 = b''.join(chunks)
+        key = base64.b64decode(b64)
+        return cls(rdclass, rdtype, precedence, gateway_type, algorithm,
+                   gateway, key)
+
+    def to_wire(self, file, compress=None, origin=None):
+        header = struct.pack("!BBB", self.precedence, self.gateway_type,
+                             self.algorithm)
+        file.write(header)
+        if self.gateway_type == 0:
+            pass
+        elif self.gateway_type == 1:
+            file.write(dns.inet.inet_pton(dns.inet.AF_INET, self.gateway))
+        elif self.gateway_type == 2:
+            file.write(dns.inet.inet_pton(dns.inet.AF_INET6, self.gateway))
+        elif self.gateway_type == 3:
+            self.gateway.to_wire(file, None, origin)
+        else:
+            raise ValueError('invalid gateway type')
+        file.write(self.key)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        if rdlen < 3:
+            raise dns.exception.FormError
+        header = struct.unpack('!BBB', wire[current: current + 3])
+        gateway_type = header[1]
+        current += 3
+        rdlen -= 3
+        if gateway_type == 0:
+            gateway = None
+        elif gateway_type == 1:
+            gateway = dns.inet.inet_ntop(dns.inet.AF_INET,
+                                         wire[current: current + 4])
+            current += 4
+            rdlen -= 4
+        elif gateway_type == 2:
+            gateway = dns.inet.inet_ntop(dns.inet.AF_INET6,
+                                         wire[current: current + 16])
+            current += 16
+            rdlen -= 16
+        elif gateway_type == 3:
+            (gateway, cused) = dns.name.from_wire(wire[: current + rdlen],
+                                                  current)
+            current += cused
+            rdlen -= cused
+        else:
+            raise dns.exception.FormError('invalid IPSECKEY gateway type')
+        key = wire[current: current + rdlen].unwrap()
+        return cls(rdclass, rdtype, header[0], gateway_type, header[2],
+                   gateway, key)
+

eventlet/support/dns/rdtypes/IN/KX.py

@@ -0,0 +1,21 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import dns.rdtypes.mxbase
+
+
+class KX(dns.rdtypes.mxbase.UncompressedMX):
+
+    """KX record"""

eventlet/support/dns/rdtypes/IN/NAPTR.py

@@ -0,0 +1,125 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import struct
+
+import dns.exception
+import dns.name
+import dns.rdata
+from dns._compat import xrange, text_type
+
+
+def _write_string(file, s):
+    l = len(s)
+    assert l < 256
+    file.write(struct.pack('!B', l))
+    file.write(s)
+
+
+def _sanitize(value):
+    if isinstance(value, text_type):
+        return value.encode()
+    return value
+
+
+class NAPTR(dns.rdata.Rdata):
+
+    """NAPTR record
+
+    @ivar order: order
+    @type order: int
+    @ivar preference: preference
+    @type preference: int
+    @ivar flags: flags
+    @type flags: string
+    @ivar service: service
+    @type service: string
+    @ivar regexp: regular expression
+    @type regexp: string
+    @ivar replacement: replacement name
+    @type replacement: dns.name.Name object
+    @see: RFC 3403"""
+
+    __slots__ = ['order', 'preference', 'flags', 'service', 'regexp',
+                 'replacement']
+
+    def __init__(self, rdclass, rdtype, order, preference, flags, service,
+                 regexp, replacement):
+        super(NAPTR, self).__init__(rdclass, rdtype)
+        self.flags = _sanitize(flags)
+        self.service = _sanitize(service)
+        self.regexp = _sanitize(regexp)
+        self.order = order
+        self.preference = preference
+        self.replacement = replacement
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        replacement = self.replacement.choose_relativity(origin, relativize)
+        return '%d %d "%s" "%s" "%s" %s' % \
+               (self.order, self.preference,
+                dns.rdata._escapify(self.flags),
+                dns.rdata._escapify(self.service),
+                dns.rdata._escapify(self.regexp),
+                replacement)
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        order = tok.get_uint16()
+        preference = tok.get_uint16()
+        flags = tok.get_string()
+        service = tok.get_string()
+        regexp = tok.get_string()
+        replacement = tok.get_name()
+        replacement = replacement.choose_relativity(origin, relativize)
+        tok.get_eol()
+        return cls(rdclass, rdtype, order, preference, flags, service,
+                   regexp, replacement)
+
+    def to_wire(self, file, compress=None, origin=None):
+        two_ints = struct.pack("!HH", self.order, self.preference)
+        file.write(two_ints)
+        _write_string(file, self.flags)
+        _write_string(file, self.service)
+        _write_string(file, self.regexp)
+        self.replacement.to_wire(file, compress, origin)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        (order, preference) = struct.unpack('!HH', wire[current: current + 4])
+        current += 4
+        rdlen -= 4
+        strings = []
+        for i in xrange(3):
+            l = wire[current]
+            current += 1
+            rdlen -= 1
+            if l > rdlen or rdlen < 0:
+                raise dns.exception.FormError
+            s = wire[current: current + l].unwrap()
+            current += l
+            rdlen -= l
+            strings.append(s)
+        (replacement, cused) = dns.name.from_wire(wire[: current + rdlen],
+                                                  current)
+        if cused != rdlen:
+            raise dns.exception.FormError
+        if origin is not None:
+            replacement = replacement.relativize(origin)
+        return cls(rdclass, rdtype, order, preference, strings[0], strings[1],
+                   strings[2], replacement)
+
+    def choose_relativity(self, origin=None, relativize=True):
+        self.replacement = self.replacement.choose_relativity(origin,
+                                                              relativize)

eventlet/support/dns/rdtypes/IN/NSAP.py

@@ -0,0 +1,59 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import binascii
+
+import dns.exception
+import dns.rdata
+import dns.tokenizer
+
+
+class NSAP(dns.rdata.Rdata):
+
+    """NSAP record.
+
+    @ivar address: a NASP
+    @type address: string
+    @see: RFC 1706"""
+
+    __slots__ = ['address']
+
+    def __init__(self, rdclass, rdtype, address):
+        super(NSAP, self).__init__(rdclass, rdtype)
+        self.address = address
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        return "0x%s" % binascii.hexlify(self.address).decode()
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        address = tok.get_string()
+        tok.get_eol()
+        if address[0:2] != '0x':
+            raise dns.exception.SyntaxError('string does not start with 0x')
+        address = address[2:].replace('.', '')
+        if len(address) % 2 != 0:
+            raise dns.exception.SyntaxError('hexstring has odd length')
+        address = binascii.unhexlify(address.encode())
+        return cls(rdclass, rdtype, address)
+
+    def to_wire(self, file, compress=None, origin=None):
+        file.write(self.address)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        address = wire[current: current + rdlen].unwrap()
+        return cls(rdclass, rdtype, address)
+

eventlet/support/dns/rdtypes/IN/NSAP_PTR.py

@@ -0,0 +1,21 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import dns.rdtypes.nsbase
+
+
+class NSAP_PTR(dns.rdtypes.nsbase.UncompressedNS):
+
+    """NSAP-PTR record"""

eventlet/support/dns/rdtypes/IN/PX.py

@@ -0,0 +1,87 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import struct
+
+import dns.exception
+import dns.rdata
+import dns.name
+
+
+class PX(dns.rdata.Rdata):
+
+    """PX record.
+
+    @ivar preference: the preference value
+    @type preference: int
+    @ivar map822: the map822 name
+    @type map822: dns.name.Name object
+    @ivar mapx400: the mapx400 name
+    @type mapx400: dns.name.Name object
+    @see: RFC 2163"""
+
+    __slots__ = ['preference', 'map822', 'mapx400']
+
+    def __init__(self, rdclass, rdtype, preference, map822, mapx400):
+        super(PX, self).__init__(rdclass, rdtype)
+        self.preference = preference
+        self.map822 = map822
+        self.mapx400 = mapx400
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        map822 = self.map822.choose_relativity(origin, relativize)
+        mapx400 = self.mapx400.choose_relativity(origin, relativize)
+        return '%d %s %s' % (self.preference, map822, mapx400)
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        preference = tok.get_uint16()
+        map822 = tok.get_name()
+        map822 = map822.choose_relativity(origin, relativize)
+        mapx400 = tok.get_name(None)
+        mapx400 = mapx400.choose_relativity(origin, relativize)
+        tok.get_eol()
+        return cls(rdclass, rdtype, preference, map822, mapx400)
+
+    def to_wire(self, file, compress=None, origin=None):
+        pref = struct.pack("!H", self.preference)
+        file.write(pref)
+        self.map822.to_wire(file, None, origin)
+        self.mapx400.to_wire(file, None, origin)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        (preference, ) = struct.unpack('!H', wire[current: current + 2])
+        current += 2
+        rdlen -= 2
+        (map822, cused) = dns.name.from_wire(wire[: current + rdlen],
+                                             current)
+        if cused > rdlen:
+            raise dns.exception.FormError
+        current += cused
+        rdlen -= cused
+        if origin is not None:
+            map822 = map822.relativize(origin)
+        (mapx400, cused) = dns.name.from_wire(wire[: current + rdlen],
+                                              current)
+        if cused != rdlen:
+            raise dns.exception.FormError
+        if origin is not None:
+            mapx400 = mapx400.relativize(origin)
+        return cls(rdclass, rdtype, preference, map822, mapx400)
+
+    def choose_relativity(self, origin=None, relativize=True):
+        self.map822 = self.map822.choose_relativity(origin, relativize)
+        self.mapx400 = self.mapx400.choose_relativity(origin, relativize)

eventlet/support/dns/rdtypes/IN/SRV.py

@@ -0,0 +1,81 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import struct
+
+import dns.exception
+import dns.rdata
+import dns.name
+
+
+class SRV(dns.rdata.Rdata):
+
+    """SRV record
+
+    @ivar priority: the priority
+    @type priority: int
+    @ivar weight: the weight
+    @type weight: int
+    @ivar port: the port of the service
+    @type port: int
+    @ivar target: the target host
+    @type target: dns.name.Name object
+    @see: RFC 2782"""
+
+    __slots__ = ['priority', 'weight', 'port', 'target']
+
+    def __init__(self, rdclass, rdtype, priority, weight, port, target):
+        super(SRV, self).__init__(rdclass, rdtype)
+        self.priority = priority
+        self.weight = weight
+        self.port = port
+        self.target = target
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        target = self.target.choose_relativity(origin, relativize)
+        return '%d %d %d %s' % (self.priority, self.weight, self.port,
+                                target)
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        priority = tok.get_uint16()
+        weight = tok.get_uint16()
+        port = tok.get_uint16()
+        target = tok.get_name(None)
+        target = target.choose_relativity(origin, relativize)
+        tok.get_eol()
+        return cls(rdclass, rdtype, priority, weight, port, target)
+
+    def to_wire(self, file, compress=None, origin=None):
+        three_ints = struct.pack("!HHH", self.priority, self.weight, self.port)
+        file.write(three_ints)
+        self.target.to_wire(file, compress, origin)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        (priority, weight, port) = struct.unpack('!HHH',
+                                                 wire[current: current + 6])
+        current += 6
+        rdlen -= 6
+        (target, cused) = dns.name.from_wire(wire[: current + rdlen],
+                                             current)
+        if cused != rdlen:
+            raise dns.exception.FormError
+        if origin is not None:
+            target = target.relativize(origin)
+        return cls(rdclass, rdtype, priority, weight, port, target)
+
+    def choose_relativity(self, origin=None, relativize=True):
+        self.target = self.target.choose_relativity(origin, relativize)

eventlet/support/dns/rdtypes/IN/WKS.py

@@ -0,0 +1,106 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import socket
+import struct
+
+import dns.ipv4
+import dns.rdata
+from dns._compat import xrange
+
+_proto_tcp = socket.getprotobyname('tcp')
+_proto_udp = socket.getprotobyname('udp')
+
+
+class WKS(dns.rdata.Rdata):
+
+    """WKS record
+
+    @ivar address: the address
+    @type address: string
+    @ivar protocol: the protocol
+    @type protocol: int
+    @ivar bitmap: the bitmap
+    @type bitmap: string
+    @see: RFC 1035"""
+
+    __slots__ = ['address', 'protocol', 'bitmap']
+
+    def __init__(self, rdclass, rdtype, address, protocol, bitmap):
+        super(WKS, self).__init__(rdclass, rdtype)
+        self.address = address
+        self.protocol = protocol
+        if not isinstance(bitmap, bytearray):
+            self.bitmap = bytearray(bitmap)
+        else:
+            self.bitmap = bitmap
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        bits = []
+        for i in xrange(0, len(self.bitmap)):
+            byte = self.bitmap[i]
+            for j in xrange(0, 8):
+                if byte & (0x80 >> j):
+                    bits.append(str(i * 8 + j))
+        text = ' '.join(bits)
+        return '%s %d %s' % (self.address, self.protocol, text)
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        address = tok.get_string()
+        protocol = tok.get_string()
+        if protocol.isdigit():
+            protocol = int(protocol)
+        else:
+            protocol = socket.getprotobyname(protocol)
+        bitmap = bytearray()
+        while 1:
+            token = tok.get().unescape()
+            if token.is_eol_or_eof():
+                break
+            if token.value.isdigit():
+                serv = int(token.value)
+            else:
+                if protocol != _proto_udp and protocol != _proto_tcp:
+                    raise NotImplementedError("protocol must be TCP or UDP")
+                if protocol == _proto_udp:
+                    protocol_text = "udp"
+                else:
+                    protocol_text = "tcp"
+                serv = socket.getservbyname(token.value, protocol_text)
+            i = serv // 8
+            l = len(bitmap)
+            if l < i + 1:
+                for j in xrange(l, i + 1):
+                    bitmap.append(0)
+            bitmap[i] = bitmap[i] | (0x80 >> (serv % 8))
+        bitmap = dns.rdata._truncate_bitmap(bitmap)
+        return cls(rdclass, rdtype, address, protocol, bitmap)
+
+    def to_wire(self, file, compress=None, origin=None):
+        file.write(dns.ipv4.inet_aton(self.address))
+        protocol = struct.pack('!B', self.protocol)
+        file.write(protocol)
+        file.write(self.bitmap)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        address = dns.ipv4.inet_ntoa(wire[current: current + 4])
+        protocol, = struct.unpack('!B', wire[current + 4: current + 5])
+        current += 5
+        rdlen -= 5
+        bitmap = wire[current: current + rdlen].unwrap()
+        return cls(rdclass, rdtype, address, protocol, bitmap)
+

eventlet/support/dns/rdtypes/IN/__init__.py

@@ -0,0 +1,30 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""Class IN rdata type classes."""
+
+__all__ = [
+    'A',
+    'AAAA',
+    'APL',
+    'DHCID',
+    'KX',
+    'NAPTR',
+    'NSAP',
+    'NSAP_PTR',
+    'PX',
+    'SRV',
+    'WKS',
+]

eventlet/support/dns/rdtypes/__init__.py

@@ -0,0 +1,24 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""DNS rdata type classes"""
+
+__all__ = [
+    'ANY',
+    'IN',
+    'euibase',
+    'mxbase',
+    'nsbase',
+]

eventlet/support/dns/rdtypes/dnskeybase.py

@@ -0,0 +1,136 @@
+# Copyright (C) 2004-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import base64
+import struct
+
+import dns.exception
+import dns.dnssec
+import dns.rdata
+
+# wildcard import
+__all__ = ["SEP", "REVOKE", "ZONE",
+           "flags_to_text_set", "flags_from_text_set"]
+
+# flag constants
+SEP = 0x0001
+REVOKE = 0x0080
+ZONE = 0x0100
+
+_flag_by_text = {
+    'SEP': SEP,
+    'REVOKE': REVOKE,
+    'ZONE': ZONE
+}
+
+# We construct the inverse mapping programmatically to ensure that we
+# cannot make any mistakes (e.g. omissions, cut-and-paste errors) that
+# would cause the mapping not to be true inverse.
+_flag_by_value = dict((y, x) for x, y in _flag_by_text.items())
+
+
+def flags_to_text_set(flags):
+    """Convert a DNSKEY flags value to set texts
+    @rtype: set([string])"""
+
+    flags_set = set()
+    mask = 0x1
+    while mask <= 0x8000:
+        if flags & mask:
+            text = _flag_by_value.get(mask)
+            if not text:
+                text = hex(mask)
+            flags_set.add(text)
+        mask <<= 1
+    return flags_set
+
+
+def flags_from_text_set(texts_set):
+    """Convert set of DNSKEY flag mnemonic texts to DNSKEY flag value
+    @rtype: int"""
+
+    flags = 0
+    for text in texts_set:
+        try:
+            flags += _flag_by_text[text]
+        except KeyError:
+            raise NotImplementedError(
+                "DNSKEY flag '%s' is not supported" % text)
+    return flags
+
+
+class DNSKEYBase(dns.rdata.Rdata):
+
+    """Base class for rdata that is like a DNSKEY record
+
+    @ivar flags: the key flags
+    @type flags: int
+    @ivar protocol: the protocol for which this key may be used
+    @type protocol: int
+    @ivar algorithm: the algorithm used for the key
+    @type algorithm: int
+    @ivar key: the public key
+    @type key: string"""
+
+    __slots__ = ['flags', 'protocol', 'algorithm', 'key']
+
+    def __init__(self, rdclass, rdtype, flags, protocol, algorithm, key):
+        super(DNSKEYBase, self).__init__(rdclass, rdtype)
+        self.flags = flags
+        self.protocol = protocol
+        self.algorithm = algorithm
+        self.key = key
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        return '%d %d %d %s' % (self.flags, self.protocol, self.algorithm,
+                                dns.rdata._base64ify(self.key))
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        flags = tok.get_uint16()
+        protocol = tok.get_uint8()
+        algorithm = dns.dnssec.algorithm_from_text(tok.get_string())
+        chunks = []
+        while 1:
+            t = tok.get().unescape()
+            if t.is_eol_or_eof():
+                break
+            if not t.is_identifier():
+                raise dns.exception.SyntaxError
+            chunks.append(t.value.encode())
+        b64 = b''.join(chunks)
+        key = base64.b64decode(b64)
+        return cls(rdclass, rdtype, flags, protocol, algorithm, key)
+
+    def to_wire(self, file, compress=None, origin=None):
+        header = struct.pack("!HBB", self.flags, self.protocol, self.algorithm)
+        file.write(header)
+        file.write(self.key)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        if rdlen < 4:
+            raise dns.exception.FormError
+        header = struct.unpack('!HBB', wire[current: current + 4])
+        current += 4
+        rdlen -= 4
+        key = wire[current: current + rdlen].unwrap()
+        return cls(rdclass, rdtype, header[0], header[1], header[2],
+                   key)
+
+    def flags_to_text_set(self):
+        """Convert a DNSKEY flags value to set texts
+        @rtype: set([string])"""
+        return flags_to_text_set(self.flags)

eventlet/support/dns/rdtypes/dsbase.py

@@ -0,0 +1,84 @@
+# Copyright (C) 2010, 2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import struct
+import binascii
+
+import dns.rdata
+import dns.rdatatype
+
+
+class DSBase(dns.rdata.Rdata):
+
+    """Base class for rdata that is like a DS record
+
+    @ivar key_tag: the key tag
+    @type key_tag: int
+    @ivar algorithm: the algorithm
+    @type algorithm: int
+    @ivar digest_type: the digest type
+    @type digest_type: int
+    @ivar digest: the digest
+    @type digest: int
+    @see: draft-ietf-dnsext-delegation-signer-14.txt"""
+
+    __slots__ = ['key_tag', 'algorithm', 'digest_type', 'digest']
+
+    def __init__(self, rdclass, rdtype, key_tag, algorithm, digest_type,
+                 digest):
+        super(DSBase, self).__init__(rdclass, rdtype)
+        self.key_tag = key_tag
+        self.algorithm = algorithm
+        self.digest_type = digest_type
+        self.digest = digest
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        return '%d %d %d %s' % (self.key_tag, self.algorithm,
+                                self.digest_type,
+                                dns.rdata._hexify(self.digest,
+                                                  chunksize=128))
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        key_tag = tok.get_uint16()
+        algorithm = tok.get_uint8()
+        digest_type = tok.get_uint8()
+        chunks = []
+        while 1:
+            t = tok.get().unescape()
+            if t.is_eol_or_eof():
+                break
+            if not t.is_identifier():
+                raise dns.exception.SyntaxError
+            chunks.append(t.value.encode())
+        digest = b''.join(chunks)
+        digest = binascii.unhexlify(digest)
+        return cls(rdclass, rdtype, key_tag, algorithm, digest_type,
+                   digest)
+
+    def to_wire(self, file, compress=None, origin=None):
+        header = struct.pack("!HBB", self.key_tag, self.algorithm,
+                             self.digest_type)
+        file.write(header)
+        file.write(self.digest)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        header = struct.unpack("!HBB", wire[current: current + 4])
+        current += 4
+        rdlen -= 4
+        digest = wire[current: current + rdlen].unwrap()
+        return cls(rdclass, rdtype, header[0], header[1], header[2], digest)
+

eventlet/support/dns/rdtypes/euibase.py

@@ -0,0 +1,72 @@
+# Copyright (C) 2015 Red Hat, Inc.
+# Author: Petr Spacek <pspacek@redhat.com>
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED 'AS IS' AND RED HAT DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import binascii
+
+import dns.rdata
+from dns._compat import xrange
+
+
+class EUIBase(dns.rdata.Rdata):
+
+    """EUIxx record
+
+    @ivar fingerprint: xx-bit Extended Unique Identifier (EUI-xx)
+    @type fingerprint: string
+    @see: rfc7043.txt"""
+
+    __slots__ = ['eui']
+    # define these in subclasses
+    # byte_len = 6  # 0123456789ab (in hex)
+    # text_len = byte_len * 3 - 1  # 01-23-45-67-89-ab
+
+    def __init__(self, rdclass, rdtype, eui):
+        super(EUIBase, self).__init__(rdclass, rdtype)
+        if len(eui) != self.byte_len:
+            raise dns.exception.FormError('EUI%s rdata has to have %s bytes'
+                                          % (self.byte_len * 8, self.byte_len))
+        self.eui = eui
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        return dns.rdata._hexify(self.eui, chunksize=2).replace(' ', '-')
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        text = tok.get_string()
+        tok.get_eol()
+        if len(text) != cls.text_len:
+            raise dns.exception.SyntaxError(
+                'Input text must have %s characters' % cls.text_len)
+        expected_dash_idxs = xrange(2, cls.byte_len * 3 - 1, 3)
+        for i in expected_dash_idxs:
+            if text[i] != '-':
+                raise dns.exception.SyntaxError('Dash expected at position %s'
+                                                % i)
+        text = text.replace('-', '')
+        try:
+            data = binascii.unhexlify(text.encode())
+        except (ValueError, TypeError) as ex:
+            raise dns.exception.SyntaxError('Hex decoding error: %s' % str(ex))
+        return cls(rdclass, rdtype, data)
+
+    def to_wire(self, file, compress=None, origin=None):
+        file.write(self.eui)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        eui = wire[current:current + rdlen].unwrap()
+        return cls(rdclass, rdtype, eui)
+

eventlet/support/dns/rdtypes/mxbase.py

@@ -0,0 +1,101 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""MX-like base classes."""
+
+from io import BytesIO
+import struct
+
+import dns.exception
+import dns.rdata
+import dns.name
+
+
+class MXBase(dns.rdata.Rdata):
+
+    """Base class for rdata that is like an MX record.
+
+    @ivar preference: the preference value
+    @type preference: int
+    @ivar exchange: the exchange name
+    @type exchange: dns.name.Name object"""
+
+    __slots__ = ['preference', 'exchange']
+
+    def __init__(self, rdclass, rdtype, preference, exchange):
+        super(MXBase, self).__init__(rdclass, rdtype)
+        self.preference = preference
+        self.exchange = exchange
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        exchange = self.exchange.choose_relativity(origin, relativize)
+        return '%d %s' % (self.preference, exchange)
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        preference = tok.get_uint16()
+        exchange = tok.get_name()
+        exchange = exchange.choose_relativity(origin, relativize)
+        tok.get_eol()
+        return cls(rdclass, rdtype, preference, exchange)
+
+    def to_wire(self, file, compress=None, origin=None):
+        pref = struct.pack("!H", self.preference)
+        file.write(pref)
+        self.exchange.to_wire(file, compress, origin)
+
+    def to_digestable(self, origin=None):
+        return struct.pack("!H", self.preference) + \
+            self.exchange.to_digestable(origin)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        (preference, ) = struct.unpack('!H', wire[current: current + 2])
+        current += 2
+        rdlen -= 2
+        (exchange, cused) = dns.name.from_wire(wire[: current + rdlen],
+                                               current)
+        if cused != rdlen:
+            raise dns.exception.FormError
+        if origin is not None:
+            exchange = exchange.relativize(origin)
+        return cls(rdclass, rdtype, preference, exchange)
+
+    def choose_relativity(self, origin=None, relativize=True):
+        self.exchange = self.exchange.choose_relativity(origin, relativize)
+
+
+class UncompressedMX(MXBase):
+
+    """Base class for rdata that is like an MX record, but whose name
+    is not compressed when converted to DNS wire format, and whose
+    digestable form is not downcased."""
+
+    def to_wire(self, file, compress=None, origin=None):
+        super(UncompressedMX, self).to_wire(file, None, origin)
+
+    def to_digestable(self, origin=None):
+        f = BytesIO()
+        self.to_wire(f, None, origin)
+        return f.getvalue()
+
+
+class UncompressedDowncasingMX(MXBase):
+
+    """Base class for rdata that is like an MX record, but whose name
+    is not compressed when convert to DNS wire format."""
+
+    def to_wire(self, file, compress=None, origin=None):
+        super(UncompressedDowncasingMX, self).to_wire(file, None, origin)

eventlet/support/dns/rdtypes/nsbase.py

@@ -0,0 +1,81 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""NS-like base classes."""
+
+from io import BytesIO
+
+import dns.exception
+import dns.rdata
+import dns.name
+
+
+class NSBase(dns.rdata.Rdata):
+
+    """Base class for rdata that is like an NS record.
+
+    @ivar target: the target name of the rdata
+    @type target: dns.name.Name object"""
+
+    __slots__ = ['target']
+
+    def __init__(self, rdclass, rdtype, target):
+        super(NSBase, self).__init__(rdclass, rdtype)
+        self.target = target
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        target = self.target.choose_relativity(origin, relativize)
+        return str(target)
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        target = tok.get_name()
+        target = target.choose_relativity(origin, relativize)
+        tok.get_eol()
+        return cls(rdclass, rdtype, target)
+
+    def to_wire(self, file, compress=None, origin=None):
+        self.target.to_wire(file, compress, origin)
+
+    def to_digestable(self, origin=None):
+        return self.target.to_digestable(origin)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        (target, cused) = dns.name.from_wire(wire[: current + rdlen],
+                                             current)
+        if cused != rdlen:
+            raise dns.exception.FormError
+        if origin is not None:
+            target = target.relativize(origin)
+        return cls(rdclass, rdtype, target)
+
+    def choose_relativity(self, origin=None, relativize=True):
+        self.target = self.target.choose_relativity(origin, relativize)
+
+
+class UncompressedNS(NSBase):
+
+    """Base class for rdata that is like an NS record, but whose name
+    is not compressed when convert to DNS wire format, and whose
+    digestable form is not downcased."""
+
+    def to_wire(self, file, compress=None, origin=None):
+        super(UncompressedNS, self).to_wire(file, None, origin)
+
+    def to_digestable(self, origin=None):
+        f = BytesIO()
+        self.to_wire(f, None, origin)
+        return f.getvalue()

eventlet/support/dns/rdtypes/txtbase.py

@@ -0,0 +1,91 @@
+# Copyright (C) 2006, 2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""TXT-like base class."""
+
+import struct
+
+import dns.exception
+import dns.rdata
+import dns.tokenizer
+from dns._compat import binary_type
+
+
+class TXTBase(dns.rdata.Rdata):
+
+    """Base class for rdata that is like a TXT record
+
+    @ivar strings: the text strings
+    @type strings: list of string
+    @see: RFC 1035"""
+
+    __slots__ = ['strings']
+
+    def __init__(self, rdclass, rdtype, strings):
+        super(TXTBase, self).__init__(rdclass, rdtype)
+        if isinstance(strings, str):
+            strings = [strings]
+        self.strings = strings[:]
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        txt = ''
+        prefix = ''
+        for s in self.strings:
+            txt += '%s"%s"' % (prefix, dns.rdata._escapify(s))
+            prefix = ' '
+        return txt
+
+    @classmethod
+    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
+        strings = []
+        while 1:
+            token = tok.get().unescape()
+            if token.is_eol_or_eof():
+                break
+            if not (token.is_quoted_string() or token.is_identifier()):
+                raise dns.exception.SyntaxError("expected a string")
+            if len(token.value) > 255:
+                raise dns.exception.SyntaxError("string too long")
+            value = token.value
+            if isinstance(value, binary_type):
+                strings.append(value)
+            else:
+                strings.append(value.encode())
+        if len(strings) == 0:
+            raise dns.exception.UnexpectedEnd
+        return cls(rdclass, rdtype, strings)
+
+    def to_wire(self, file, compress=None, origin=None):
+        for s in self.strings:
+            l = len(s)
+            assert l < 256
+            file.write(struct.pack('!B', l))
+            file.write(s)
+
+    @classmethod
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
+        strings = []
+        while rdlen > 0:
+            l = wire[current]
+            current += 1
+            rdlen -= 1
+            if l > rdlen:
+                raise dns.exception.FormError
+            s = wire[current: current + l].unwrap()
+            current += l
+            rdlen -= l
+            strings.append(s)
+        return cls(rdclass, rdtype, strings)
+

eventlet/support/dns/renderer.py

@@ -0,0 +1,329 @@
+# Copyright (C) 2001-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""Help for building DNS wire format messages"""
+
+from io import BytesIO
+import struct
+import random
+import time
+
+import dns.exception
+import dns.tsig
+from ._compat import long
+
+
+QUESTION = 0
+ANSWER = 1
+AUTHORITY = 2
+ADDITIONAL = 3
+
+
+class Renderer(object):
+
+    """Helper class for building DNS wire-format messages.
+
+    Most applications can use the higher-level L{dns.message.Message}
+    class and its to_wire() method to generate wire-format messages.
+    This class is for those applications which need finer control
+    over the generation of messages.
+
+    Typical use::
+
+        r = dns.renderer.Renderer(id=1, flags=0x80, max_size=512)
+        r.add_question(qname, qtype, qclass)
+        r.add_rrset(dns.renderer.ANSWER, rrset_1)
+        r.add_rrset(dns.renderer.ANSWER, rrset_2)
+        r.add_rrset(dns.renderer.AUTHORITY, ns_rrset)
+        r.add_edns(0, 0, 4096)
+        r.add_rrset(dns.renderer.ADDTIONAL, ad_rrset_1)
+        r.add_rrset(dns.renderer.ADDTIONAL, ad_rrset_2)
+        r.write_header()
+        r.add_tsig(keyname, secret, 300, 1, 0, '', request_mac)
+        wire = r.get_wire()
+
+    @ivar output: where rendering is written
+    @type output: BytesIO object
+    @ivar id: the message id
+    @type id: int
+    @ivar flags: the message flags
+    @type flags: int
+    @ivar max_size: the maximum size of the message
+    @type max_size: int
+    @ivar origin: the origin to use when rendering relative names
+    @type origin: dns.name.Name object
+    @ivar compress: the compression table
+    @type compress: dict
+    @ivar section: the section currently being rendered
+    @type section: int (dns.renderer.QUESTION, dns.renderer.ANSWER,
+    dns.renderer.AUTHORITY, or dns.renderer.ADDITIONAL)
+    @ivar counts: list of the number of RRs in each section
+    @type counts: int list of length 4
+    @ivar mac: the MAC of the rendered message (if TSIG was used)
+    @type mac: string
+    """
+
+    def __init__(self, id=None, flags=0, max_size=65535, origin=None):
+        """Initialize a new renderer.
+
+        @param id: the message id
+        @type id: int
+        @param flags: the DNS message flags
+        @type flags: int
+        @param max_size: the maximum message size; the default is 65535.
+        If rendering results in a message greater than I{max_size},
+        then L{dns.exception.TooBig} will be raised.
+        @type max_size: int
+        @param origin: the origin to use when rendering relative names
+        @type origin: dns.name.Name or None.
+        """
+
+        self.output = BytesIO()
+        if id is None:
+            self.id = random.randint(0, 65535)
+        else:
+            self.id = id
+        self.flags = flags
+        self.max_size = max_size
+        self.origin = origin
+        self.compress = {}
+        self.section = QUESTION
+        self.counts = [0, 0, 0, 0]
+        self.output.write(b'\x00' * 12)
+        self.mac = ''
+
+    def _rollback(self, where):
+        """Truncate the output buffer at offset I{where}, and remove any
+        compression table entries that pointed beyond the truncation
+        point.
+
+        @param where: the offset
+        @type where: int
+        """
+
+        self.output.seek(where)
+        self.output.truncate()
+        keys_to_delete = []
+        for k, v in self.compress.items():
+            if v >= where:
+                keys_to_delete.append(k)
+        for k in keys_to_delete:
+            del self.compress[k]
+
+    def _set_section(self, section):
+        """Set the renderer's current section.
+
+        Sections must be rendered order: QUESTION, ANSWER, AUTHORITY,
+        ADDITIONAL.  Sections may be empty.
+
+        @param section: the section
+        @type section: int
+        @raises dns.exception.FormError: an attempt was made to set
+        a section value less than the current section.
+        """
+
+        if self.section != section:
+            if self.section > section:
+                raise dns.exception.FormError
+            self.section = section
+
+    def add_question(self, qname, rdtype, rdclass=dns.rdataclass.IN):
+        """Add a question to the message.
+
+        @param qname: the question name
+        @type qname: dns.name.Name
+        @param rdtype: the question rdata type
+        @type rdtype: int
+        @param rdclass: the question rdata class
+        @type rdclass: int
+        """
+
+        self._set_section(QUESTION)
+        before = self.output.tell()
+        qname.to_wire(self.output, self.compress, self.origin)
+        self.output.write(struct.pack("!HH", rdtype, rdclass))
+        after = self.output.tell()
+        if after >= self.max_size:
+            self._rollback(before)
+            raise dns.exception.TooBig
+        self.counts[QUESTION] += 1
+
+    def add_rrset(self, section, rrset, **kw):
+        """Add the rrset to the specified section.
+
+        Any keyword arguments are passed on to the rdataset's to_wire()
+        routine.
+
+        @param section: the section
+        @type section: int
+        @param rrset: the rrset
+        @type rrset: dns.rrset.RRset object
+        """
+
+        self._set_section(section)
+        before = self.output.tell()
+        n = rrset.to_wire(self.output, self.compress, self.origin, **kw)
+        after = self.output.tell()
+        if after >= self.max_size:
+            self._rollback(before)
+            raise dns.exception.TooBig
+        self.counts[section] += n
+
+    def add_rdataset(self, section, name, rdataset, **kw):
+        """Add the rdataset to the specified section, using the specified
+        name as the owner name.
+
+        Any keyword arguments are passed on to the rdataset's to_wire()
+        routine.
+
+        @param section: the section
+        @type section: int
+        @param name: the owner name
+        @type name: dns.name.Name object
+        @param rdataset: the rdataset
+        @type rdataset: dns.rdataset.Rdataset object
+        """
+
+        self._set_section(section)
+        before = self.output.tell()
+        n = rdataset.to_wire(name, self.output, self.compress, self.origin,
+                             **kw)
+        after = self.output.tell()
+        if after >= self.max_size:
+            self._rollback(before)
+            raise dns.exception.TooBig
+        self.counts[section] += n
+
+    def add_edns(self, edns, ednsflags, payload, options=None):
+        """Add an EDNS OPT record to the message.
+
+        @param edns: The EDNS level to use.
+        @type edns: int
+        @param ednsflags: EDNS flag values.
+        @type ednsflags: int
+        @param payload: The EDNS sender's payload field, which is the maximum
+        size of UDP datagram the sender can handle.
+        @type payload: int
+        @param options: The EDNS options list
+        @type options: list of dns.edns.Option instances
+        @see: RFC 2671
+        """
+
+        # make sure the EDNS version in ednsflags agrees with edns
+        ednsflags &= long(0xFF00FFFF)
+        ednsflags |= (edns << 16)
+        self._set_section(ADDITIONAL)
+        before = self.output.tell()
+        self.output.write(struct.pack('!BHHIH', 0, dns.rdatatype.OPT, payload,
+                                      ednsflags, 0))
+        if options is not None:
+            lstart = self.output.tell()
+            for opt in options:
+                stuff = struct.pack("!HH", opt.otype, 0)
+                self.output.write(stuff)
+                start = self.output.tell()
+                opt.to_wire(self.output)
+                end = self.output.tell()
+                assert end - start < 65536
+                self.output.seek(start - 2)
+                stuff = struct.pack("!H", end - start)
+                self.output.write(stuff)
+                self.output.seek(0, 2)
+            lend = self.output.tell()
+            assert lend - lstart < 65536
+            self.output.seek(lstart - 2)
+            stuff = struct.pack("!H", lend - lstart)
+            self.output.write(stuff)
+            self.output.seek(0, 2)
+        after = self.output.tell()
+        if after >= self.max_size:
+            self._rollback(before)
+            raise dns.exception.TooBig
+        self.counts[ADDITIONAL] += 1
+
+    def add_tsig(self, keyname, secret, fudge, id, tsig_error, other_data,
+                 request_mac, algorithm=dns.tsig.default_algorithm):
+        """Add a TSIG signature to the message.
+
+        @param keyname: the TSIG key name
+        @type keyname: dns.name.Name object
+        @param secret: the secret to use
+        @type secret: string
+        @param fudge: TSIG time fudge
+        @type fudge: int
+        @param id: the message id to encode in the tsig signature
+        @type id: int
+        @param tsig_error: TSIG error code; default is 0.
+        @type tsig_error: int
+        @param other_data: TSIG other data.
+        @type other_data: string
+        @param request_mac: This message is a response to the request which
+        had the specified MAC.
+        @type request_mac: string
+        @param algorithm: the TSIG algorithm to use
+        @type algorithm: dns.name.Name object
+        """
+
+        self._set_section(ADDITIONAL)
+        before = self.output.tell()
+        s = self.output.getvalue()
+        (tsig_rdata, self.mac, ctx) = dns.tsig.sign(s,
+                                                    keyname,
+                                                    secret,
+                                                    int(time.time()),
+                                                    fudge,
+                                                    id,
+                                                    tsig_error,
+                                                    other_data,
+                                                    request_mac,
+                                                    algorithm=algorithm)
+        keyname.to_wire(self.output, self.compress, self.origin)
+        self.output.write(struct.pack('!HHIH', dns.rdatatype.TSIG,
+                                      dns.rdataclass.ANY, 0, 0))
+        rdata_start = self.output.tell()
+        self.output.write(tsig_rdata)
+        after = self.output.tell()
+        assert after - rdata_start < 65536
+        if after >= self.max_size:
+            self._rollback(before)
+            raise dns.exception.TooBig
+        self.output.seek(rdata_start - 2)
+        self.output.write(struct.pack('!H', after - rdata_start))
+        self.counts[ADDITIONAL] += 1
+        self.output.seek(10)
+        self.output.write(struct.pack('!H', self.counts[ADDITIONAL]))
+        self.output.seek(0, 2)
+
+    def write_header(self):
+        """Write the DNS message header.
+
+        Writing the DNS message header is done after all sections
+        have been rendered, but before the optional TSIG signature
+        is added.
+        """
+
+        self.output.seek(0)
+        self.output.write(struct.pack('!HHHHHH', self.id, self.flags,
+                                      self.counts[0], self.counts[1],
+                                      self.counts[2], self.counts[3]))
+        self.output.seek(0, 2)
+
+    def get_wire(self):
+        """Return the wire format message.
+
+        @rtype: string
+        """
+
+        return self.output.getvalue()

eventlet/support/dns/reversename.py

@@ -0,0 +1,89 @@
+# Copyright (C) 2006, 2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""DNS Reverse Map Names.
+
+@var ipv4_reverse_domain: The DNS IPv4 reverse-map domain, in-addr.arpa.
+@type ipv4_reverse_domain: dns.name.Name object
+@var ipv6_reverse_domain: The DNS IPv6 reverse-map domain, ip6.arpa.
+@type ipv6_reverse_domain: dns.name.Name object
+"""
+
+import binascii
+import sys
+
+import dns.name
+import dns.ipv6
+import dns.ipv4
+
+ipv4_reverse_domain = dns.name.from_text('in-addr.arpa.')
+ipv6_reverse_domain = dns.name.from_text('ip6.arpa.')
+
+
+def from_address(text):
+    """Convert an IPv4 or IPv6 address in textual form into a Name object whose
+    value is the reverse-map domain name of the address.
+    @param text: an IPv4 or IPv6 address in textual form (e.g. '127.0.0.1',
+    '::1')
+    @type text: str
+    @rtype: dns.name.Name object
+    """
+    try:
+        v6 = dns.ipv6.inet_aton(text)
+        if dns.ipv6.is_mapped(v6):
+            if sys.version_info >= (3,):
+                parts = ['%d' % byte for byte in v6[12:]]
+            else:
+                parts = ['%d' % ord(byte) for byte in v6[12:]]
+            origin = ipv4_reverse_domain
+        else:
+            parts = [x for x in str(binascii.hexlify(v6).decode())]
+            origin = ipv6_reverse_domain
+    except:
+        parts = ['%d' %
+                 byte for byte in bytearray(dns.ipv4.inet_aton(text))]
+        origin = ipv4_reverse_domain
+    parts.reverse()
+    return dns.name.from_text('.'.join(parts), origin=origin)
+
+
+def to_address(name):
+    """Convert a reverse map domain name into textual address form.
+    @param name: an IPv4 or IPv6 address in reverse-map form.
+    @type name: dns.name.Name object
+    @rtype: str
+    """
+    if name.is_subdomain(ipv4_reverse_domain):
+        name = name.relativize(ipv4_reverse_domain)
+        labels = list(name.labels)
+        labels.reverse()
+        text = b'.'.join(labels)
+        # run through inet_aton() to check syntax and make pretty.
+        return dns.ipv4.inet_ntoa(dns.ipv4.inet_aton(text))
+    elif name.is_subdomain(ipv6_reverse_domain):
+        name = name.relativize(ipv6_reverse_domain)
+        labels = list(name.labels)
+        labels.reverse()
+        parts = []
+        i = 0
+        l = len(labels)
+        while i < l:
+            parts.append(b''.join(labels[i:i + 4]))
+            i += 4
+        text = b':'.join(parts)
+        # run through inet_aton() to check syntax and make pretty.
+        return dns.ipv6.inet_ntoa(dns.ipv6.inet_aton(text))
+    else:
+        raise dns.exception.SyntaxError('unknown reverse-map address family')

eventlet/support/dns/rrset.py

@@ -0,0 +1,181 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""DNS RRsets (an RRset is a named rdataset)"""
+
+
+import dns.name
+import dns.rdataset
+import dns.rdataclass
+import dns.renderer
+from ._compat import string_types
+
+
+class RRset(dns.rdataset.Rdataset):
+
+    """A DNS RRset (named rdataset).
+
+    RRset inherits from Rdataset, and RRsets can be treated as
+    Rdatasets in most cases.  There are, however, a few notable
+    exceptions.  RRsets have different to_wire() and to_text() method
+    arguments, reflecting the fact that RRsets always have an owner
+    name.
+    """
+
+    __slots__ = ['name', 'deleting']
+
+    def __init__(self, name, rdclass, rdtype, covers=dns.rdatatype.NONE,
+                 deleting=None):
+        """Create a new RRset."""
+
+        super(RRset, self).__init__(rdclass, rdtype, covers)
+        self.name = name
+        self.deleting = deleting
+
+    def _clone(self):
+        obj = super(RRset, self)._clone()
+        obj.name = self.name
+        obj.deleting = self.deleting
+        return obj
+
+    def __repr__(self):
+        if self.covers == 0:
+            ctext = ''
+        else:
+            ctext = '(' + dns.rdatatype.to_text(self.covers) + ')'
+        if self.deleting is not None:
+            dtext = ' delete=' + dns.rdataclass.to_text(self.deleting)
+        else:
+            dtext = ''
+        return '<DNS ' + str(self.name) + ' ' + \
+               dns.rdataclass.to_text(self.rdclass) + ' ' + \
+               dns.rdatatype.to_text(self.rdtype) + ctext + dtext + ' RRset>'
+
+    def __str__(self):
+        return self.to_text()
+
+    def __eq__(self, other):
+        """Two RRsets are equal if they have the same name and the same
+        rdataset
+
+        @rtype: bool"""
+        if not isinstance(other, RRset):
+            return False
+        if self.name != other.name:
+            return False
+        return super(RRset, self).__eq__(other)
+
+    def match(self, name, rdclass, rdtype, covers, deleting=None):
+        """Returns True if this rrset matches the specified class, type,
+        covers, and deletion state."""
+
+        if not super(RRset, self).match(rdclass, rdtype, covers):
+            return False
+        if self.name != name or self.deleting != deleting:
+            return False
+        return True
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        """Convert the RRset into DNS master file format.
+
+        @see: L{dns.name.Name.choose_relativity} for more information
+        on how I{origin} and I{relativize} determine the way names
+        are emitted.
+
+        Any additional keyword arguments are passed on to the rdata
+        to_text() method.
+
+        @param origin: The origin for relative names, or None.
+        @type origin: dns.name.Name object
+        @param relativize: True if names should names be relativized
+        @type relativize: bool"""
+
+        return super(RRset, self).to_text(self.name, origin, relativize,
+                                          self.deleting, **kw)
+
+    def to_wire(self, file, compress=None, origin=None, **kw):
+        """Convert the RRset to wire format."""
+
+        return super(RRset, self).to_wire(self.name, file, compress, origin,
+                                          self.deleting, **kw)
+
+    def to_rdataset(self):
+        """Convert an RRset into an Rdataset.
+
+        @rtype: dns.rdataset.Rdataset object
+        """
+        return dns.rdataset.from_rdata_list(self.ttl, list(self))
+
+
+def from_text_list(name, ttl, rdclass, rdtype, text_rdatas):
+    """Create an RRset with the specified name, TTL, class, and type, and with
+    the specified list of rdatas in text format.
+
+    @rtype: dns.rrset.RRset object
+    """
+
+    if isinstance(name, string_types):
+        name = dns.name.from_text(name, None)
+    if isinstance(rdclass, string_types):
+        rdclass = dns.rdataclass.from_text(rdclass)
+    if isinstance(rdtype, string_types):
+        rdtype = dns.rdatatype.from_text(rdtype)
+    r = RRset(name, rdclass, rdtype)
+    r.update_ttl(ttl)
+    for t in text_rdatas:
+        rd = dns.rdata.from_text(r.rdclass, r.rdtype, t)
+        r.add(rd)
+    return r
+
+
+def from_text(name, ttl, rdclass, rdtype, *text_rdatas):
+    """Create an RRset with the specified name, TTL, class, and type and with
+    the specified rdatas in text format.
+
+    @rtype: dns.rrset.RRset object
+    """
+
+    return from_text_list(name, ttl, rdclass, rdtype, text_rdatas)
+
+
+def from_rdata_list(name, ttl, rdatas):
+    """Create an RRset with the specified name and TTL, and with
+    the specified list of rdata objects.
+
+    @rtype: dns.rrset.RRset object
+    """
+
+    if isinstance(name, string_types):
+        name = dns.name.from_text(name, None)
+
+    if len(rdatas) == 0:
+        raise ValueError("rdata list must not be empty")
+    r = None
+    for rd in rdatas:
+        if r is None:
+            r = RRset(name, rd.rdclass, rd.rdtype)
+            r.update_ttl(ttl)
+        r.add(rd)
+    return r
+
+
+def from_rdata(name, ttl, *rdatas):
+    """Create an RRset with the specified name and TTL, and with
+    the specified rdata objects.
+
+    @rtype: dns.rrset.RRset object
+    """
+
+    return from_rdata_list(name, ttl, rdatas)

eventlet/support/dns/set.py

@@ -0,0 +1,262 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""A simple Set class."""
+
+
+class Set(object):
+
+    """A simple set class.
+
+    Sets are not in Python until 2.3, and rdata are not immutable so
+    we cannot use sets.Set anyway.  This class implements subset of
+    the 2.3 Set interface using a list as the container.
+
+    @ivar items: A list of the items which are in the set
+    @type items: list"""
+
+    __slots__ = ['items']
+
+    def __init__(self, items=None):
+        """Initialize the set.
+
+        @param items: the initial set of items
+        @type items: any iterable or None
+        """
+
+        self.items = []
+        if items is not None:
+            for item in items:
+                self.add(item)
+
+    def __repr__(self):
+        return "dns.simpleset.Set(%s)" % repr(self.items)
+
+    def add(self, item):
+        """Add an item to the set."""
+        if item not in self.items:
+            self.items.append(item)
+
+    def remove(self, item):
+        """Remove an item from the set."""
+        self.items.remove(item)
+
+    def discard(self, item):
+        """Remove an item from the set if present."""
+        try:
+            self.items.remove(item)
+        except ValueError:
+            pass
+
+    def _clone(self):
+        """Make a (shallow) copy of the set.
+
+        There is a 'clone protocol' that subclasses of this class
+        should use.  To make a copy, first call your super's _clone()
+        method, and use the object returned as the new instance.  Then
+        make shallow copies of the attributes defined in the subclass.
+
+        This protocol allows us to write the set algorithms that
+        return new instances (e.g. union) once, and keep using them in
+        subclasses.
+        """
+
+        cls = self.__class__
+        obj = cls.__new__(cls)
+        obj.items = list(self.items)
+        return obj
+
+    def __copy__(self):
+        """Make a (shallow) copy of the set."""
+        return self._clone()
+
+    def copy(self):
+        """Make a (shallow) copy of the set."""
+        return self._clone()
+
+    def union_update(self, other):
+        """Update the set, adding any elements from other which are not
+        already in the set.
+        @param other: the collection of items with which to update the set
+        @type other: Set object
+        """
+        if not isinstance(other, Set):
+            raise ValueError('other must be a Set instance')
+        if self is other:
+            return
+        for item in other.items:
+            self.add(item)
+
+    def intersection_update(self, other):
+        """Update the set, removing any elements from other which are not
+        in both sets.
+        @param other: the collection of items with which to update the set
+        @type other: Set object
+        """
+        if not isinstance(other, Set):
+            raise ValueError('other must be a Set instance')
+        if self is other:
+            return
+        # we make a copy of the list so that we can remove items from
+        # the list without breaking the iterator.
+        for item in list(self.items):
+            if item not in other.items:
+                self.items.remove(item)
+
+    def difference_update(self, other):
+        """Update the set, removing any elements from other which are in
+        the set.
+        @param other: the collection of items with which to update the set
+        @type other: Set object
+        """
+        if not isinstance(other, Set):
+            raise ValueError('other must be a Set instance')
+        if self is other:
+            self.items = []
+        else:
+            for item in other.items:
+                self.discard(item)
+
+    def union(self, other):
+        """Return a new set which is the union of I{self} and I{other}.
+
+        @param other: the other set
+        @type other: Set object
+        @rtype: the same type as I{self}
+        """
+
+        obj = self._clone()
+        obj.union_update(other)
+        return obj
+
+    def intersection(self, other):
+        """Return a new set which is the intersection of I{self} and I{other}.
+
+        @param other: the other set
+        @type other: Set object
+        @rtype: the same type as I{self}
+        """
+
+        obj = self._clone()
+        obj.intersection_update(other)
+        return obj
+
+    def difference(self, other):
+        """Return a new set which I{self} - I{other}, i.e. the items
+        in I{self} which are not also in I{other}.
+
+        @param other: the other set
+        @type other: Set object
+        @rtype: the same type as I{self}
+        """
+
+        obj = self._clone()
+        obj.difference_update(other)
+        return obj
+
+    def __or__(self, other):
+        return self.union(other)
+
+    def __and__(self, other):
+        return self.intersection(other)
+
+    def __add__(self, other):
+        return self.union(other)
+
+    def __sub__(self, other):
+        return self.difference(other)
+
+    def __ior__(self, other):
+        self.union_update(other)
+        return self
+
+    def __iand__(self, other):
+        self.intersection_update(other)
+        return self
+
+    def __iadd__(self, other):
+        self.union_update(other)
+        return self
+
+    def __isub__(self, other):
+        self.difference_update(other)
+        return self
+
+    def update(self, other):
+        """Update the set, adding any elements from other which are not
+        already in the set.
+        @param other: the collection of items with which to update the set
+        @type other: any iterable type"""
+        for item in other:
+            self.add(item)
+
+    def clear(self):
+        """Make the set empty."""
+        self.items = []
+
+    def __eq__(self, other):
+        # Yes, this is inefficient but the sets we're dealing with are
+        # usually quite small, so it shouldn't hurt too much.
+        for item in self.items:
+            if item not in other.items:
+                return False
+        for item in other.items:
+            if item not in self.items:
+                return False
+        return True
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    def __len__(self):
+        return len(self.items)
+
+    def __iter__(self):
+        return iter(self.items)
+
+    def __getitem__(self, i):
+        return self.items[i]
+
+    def __delitem__(self, i):
+        del self.items[i]
+
+    def __getslice__(self, i, j):
+        return self.items[i:j]
+
+    def issubset(self, other):
+        """Is I{self} a subset of I{other}?
+
+        @rtype: bool
+        """
+
+        if not isinstance(other, Set):
+            raise ValueError('other must be a Set instance')
+        for item in self.items:
+            if item not in other.items:
+                return False
+        return True
+
+    def issuperset(self, other):
+        """Is I{self} a superset of I{other}?
+
+        @rtype: bool
+        """
+
+        if not isinstance(other, Set):
+            raise ValueError('other must be a Set instance')
+        for item in other.items:
+            if item not in self.items:
+                return False
+        return True

eventlet/support/dns/tokenizer.py

@@ -0,0 +1,564 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""Tokenize DNS master file format"""
+
+from io import StringIO
+import sys
+
+import dns.exception
+import dns.name
+import dns.ttl
+from ._compat import long, text_type, binary_type
+
+_DELIMITERS = {
+    ' ': True,
+    '\t': True,
+    '\n': True,
+    ';': True,
+    '(': True,
+    ')': True,
+    '"': True}
+
+_QUOTING_DELIMITERS = {'"': True}
+
+EOF = 0
+EOL = 1
+WHITESPACE = 2
+IDENTIFIER = 3
+QUOTED_STRING = 4
+COMMENT = 5
+DELIMITER = 6
+
+
+class UngetBufferFull(dns.exception.DNSException):
+
+    """An attempt was made to unget a token when the unget buffer was full."""
+
+
+class Token(object):
+
+    """A DNS master file format token.
+
+    @ivar ttype: The token type
+    @type ttype: int
+    @ivar value: The token value
+    @type value: string
+    @ivar has_escape: Does the token value contain escapes?
+    @type has_escape: bool
+    """
+
+    def __init__(self, ttype, value='', has_escape=False):
+        """Initialize a token instance.
+
+        @param ttype: The token type
+        @type ttype: int
+        @param value: The token value
+        @type value: string
+        @param has_escape: Does the token value contain escapes?
+        @type has_escape: bool
+        """
+        self.ttype = ttype
+        self.value = value
+        self.has_escape = has_escape
+
+    def is_eof(self):
+        return self.ttype == EOF
+
+    def is_eol(self):
+        return self.ttype == EOL
+
+    def is_whitespace(self):
+        return self.ttype == WHITESPACE
+
+    def is_identifier(self):
+        return self.ttype == IDENTIFIER
+
+    def is_quoted_string(self):
+        return self.ttype == QUOTED_STRING
+
+    def is_comment(self):
+        return self.ttype == COMMENT
+
+    def is_delimiter(self):
+        return self.ttype == DELIMITER
+
+    def is_eol_or_eof(self):
+        return self.ttype == EOL or self.ttype == EOF
+
+    def __eq__(self, other):
+        if not isinstance(other, Token):
+            return False
+        return (self.ttype == other.ttype and
+                self.value == other.value)
+
+    def __ne__(self, other):
+        if not isinstance(other, Token):
+            return True
+        return (self.ttype != other.ttype or
+                self.value != other.value)
+
+    def __str__(self):
+        return '%d "%s"' % (self.ttype, self.value)
+
+    def unescape(self):
+        if not self.has_escape:
+            return self
+        unescaped = ''
+        l = len(self.value)
+        i = 0
+        while i < l:
+            c = self.value[i]
+            i += 1
+            if c == '\\':
+                if i >= l:
+                    raise dns.exception.UnexpectedEnd
+                c = self.value[i]
+                i += 1
+                if c.isdigit():
+                    if i >= l:
+                        raise dns.exception.UnexpectedEnd
+                    c2 = self.value[i]
+                    i += 1
+                    if i >= l:
+                        raise dns.exception.UnexpectedEnd
+                    c3 = self.value[i]
+                    i += 1
+                    if not (c2.isdigit() and c3.isdigit()):
+                        raise dns.exception.SyntaxError
+                    c = chr(int(c) * 100 + int(c2) * 10 + int(c3))
+            unescaped += c
+        return Token(self.ttype, unescaped)
+
+    # compatibility for old-style tuple tokens
+
+    def __len__(self):
+        return 2
+
+    def __iter__(self):
+        return iter((self.ttype, self.value))
+
+    def __getitem__(self, i):
+        if i == 0:
+            return self.ttype
+        elif i == 1:
+            return self.value
+        else:
+            raise IndexError
+
+
+class Tokenizer(object):
+
+    """A DNS master file format tokenizer.
+
+    A token is a (type, value) tuple, where I{type} is an int, and
+    I{value} is a string.  The valid types are EOF, EOL, WHITESPACE,
+    IDENTIFIER, QUOTED_STRING, COMMENT, and DELIMITER.
+
+    @ivar file: The file to tokenize
+    @type file: file
+    @ivar ungotten_char: The most recently ungotten character, or None.
+    @type ungotten_char: string
+    @ivar ungotten_token: The most recently ungotten token, or None.
+    @type ungotten_token: (int, string) token tuple
+    @ivar multiline: The current multiline level.  This value is increased
+    by one every time a '(' delimiter is read, and decreased by one every time
+    a ')' delimiter is read.
+    @type multiline: int
+    @ivar quoting: This variable is true if the tokenizer is currently
+    reading a quoted string.
+    @type quoting: bool
+    @ivar eof: This variable is true if the tokenizer has encountered EOF.
+    @type eof: bool
+    @ivar delimiters: The current delimiter dictionary.
+    @type delimiters: dict
+    @ivar line_number: The current line number
+    @type line_number: int
+    @ivar filename: A filename that will be returned by the L{where} method.
+    @type filename: string
+    """
+
+    def __init__(self, f=sys.stdin, filename=None):
+        """Initialize a tokenizer instance.
+
+        @param f: The file to tokenize.  The default is sys.stdin.
+        This parameter may also be a string, in which case the tokenizer
+        will take its input from the contents of the string.
+        @type f: file or string
+        @param filename: the name of the filename that the L{where} method
+        will return.
+        @type filename: string
+        """
+
+        if isinstance(f, text_type):
+            f = StringIO(f)
+            if filename is None:
+                filename = '<string>'
+        elif isinstance(f, binary_type):
+            f = StringIO(f.decode())
+            if filename is None:
+                filename = '<string>'
+        else:
+            if filename is None:
+                if f is sys.stdin:
+                    filename = '<stdin>'
+                else:
+                    filename = '<file>'
+        self.file = f
+        self.ungotten_char = None
+        self.ungotten_token = None
+        self.multiline = 0
+        self.quoting = False
+        self.eof = False
+        self.delimiters = _DELIMITERS
+        self.line_number = 1
+        self.filename = filename
+
+    def _get_char(self):
+        """Read a character from input.
+        @rtype: string
+        """
+
+        if self.ungotten_char is None:
+            if self.eof:
+                c = ''
+            else:
+                c = self.file.read(1)
+                if c == '':
+                    self.eof = True
+                elif c == '\n':
+                    self.line_number += 1
+        else:
+            c = self.ungotten_char
+            self.ungotten_char = None
+        return c
+
+    def where(self):
+        """Return the current location in the input.
+
+        @rtype: (string, int) tuple.  The first item is the filename of
+        the input, the second is the current line number.
+        """
+
+        return (self.filename, self.line_number)
+
+    def _unget_char(self, c):
+        """Unget a character.
+
+        The unget buffer for characters is only one character large; it is
+        an error to try to unget a character when the unget buffer is not
+        empty.
+
+        @param c: the character to unget
+        @type c: string
+        @raises UngetBufferFull: there is already an ungotten char
+        """
+
+        if self.ungotten_char is not None:
+            raise UngetBufferFull
+        self.ungotten_char = c
+
+    def skip_whitespace(self):
+        """Consume input until a non-whitespace character is encountered.
+
+        The non-whitespace character is then ungotten, and the number of
+        whitespace characters consumed is returned.
+
+        If the tokenizer is in multiline mode, then newlines are whitespace.
+
+        @rtype: int
+        """
+
+        skipped = 0
+        while True:
+            c = self._get_char()
+            if c != ' ' and c != '\t':
+                if (c != '\n') or not self.multiline:
+                    self._unget_char(c)
+                    return skipped
+            skipped += 1
+
+    def get(self, want_leading=False, want_comment=False):
+        """Get the next token.
+
+        @param want_leading: If True, return a WHITESPACE token if the
+        first character read is whitespace.  The default is False.
+        @type want_leading: bool
+        @param want_comment: If True, return a COMMENT token if the
+        first token read is a comment.  The default is False.
+        @type want_comment: bool
+        @rtype: Token object
+        @raises dns.exception.UnexpectedEnd: input ended prematurely
+        @raises dns.exception.SyntaxError: input was badly formed
+        """
+
+        if self.ungotten_token is not None:
+            token = self.ungotten_token
+            self.ungotten_token = None
+            if token.is_whitespace():
+                if want_leading:
+                    return token
+            elif token.is_comment():
+                if want_comment:
+                    return token
+            else:
+                return token
+        skipped = self.skip_whitespace()
+        if want_leading and skipped > 0:
+            return Token(WHITESPACE, ' ')
+        token = ''
+        ttype = IDENTIFIER
+        has_escape = False
+        while True:
+            c = self._get_char()
+            if c == '' or c in self.delimiters:
+                if c == '' and self.quoting:
+                    raise dns.exception.UnexpectedEnd
+                if token == '' and ttype != QUOTED_STRING:
+                    if c == '(':
+                        self.multiline += 1
+                        self.skip_whitespace()
+                        continue
+                    elif c == ')':
+                        if self.multiline <= 0:
+                            raise dns.exception.SyntaxError
+                        self.multiline -= 1
+                        self.skip_whitespace()
+                        continue
+                    elif c == '"':
+                        if not self.quoting:
+                            self.quoting = True
+                            self.delimiters = _QUOTING_DELIMITERS
+                            ttype = QUOTED_STRING
+                            continue
+                        else:
+                            self.quoting = False
+                            self.delimiters = _DELIMITERS
+                            self.skip_whitespace()
+                            continue
+                    elif c == '\n':
+                        return Token(EOL, '\n')
+                    elif c == ';':
+                        while 1:
+                            c = self._get_char()
+                            if c == '\n' or c == '':
+                                break
+                            token += c
+                        if want_comment:
+                            self._unget_char(c)
+                            return Token(COMMENT, token)
+                        elif c == '':
+                            if self.multiline:
+                                raise dns.exception.SyntaxError(
+                                    'unbalanced parentheses')
+                            return Token(EOF)
+                        elif self.multiline:
+                            self.skip_whitespace()
+                            token = ''
+                            continue
+                        else:
+                            return Token(EOL, '\n')
+                    else:
+                        # This code exists in case we ever want a
+                        # delimiter to be returned.  It never produces
+                        # a token currently.
+                        token = c
+                        ttype = DELIMITER
+                else:
+                    self._unget_char(c)
+                break
+            elif self.quoting:
+                if c == '\\':
+                    c = self._get_char()
+                    if c == '':
+                        raise dns.exception.UnexpectedEnd
+                    if c.isdigit():
+                        c2 = self._get_char()
+                        if c2 == '':
+                            raise dns.exception.UnexpectedEnd
+                        c3 = self._get_char()
+                        if c == '':
+                            raise dns.exception.UnexpectedEnd
+                        if not (c2.isdigit() and c3.isdigit()):
+                            raise dns.exception.SyntaxError
+                        c = chr(int(c) * 100 + int(c2) * 10 + int(c3))
+                elif c == '\n':
+                    raise dns.exception.SyntaxError('newline in quoted string')
+            elif c == '\\':
+                #
+                # It's an escape.  Put it and the next character into
+                # the token; it will be checked later for goodness.
+                #
+                token += c
+                has_escape = True
+                c = self._get_char()
+                if c == '' or c == '\n':
+                    raise dns.exception.UnexpectedEnd
+            token += c
+        if token == '' and ttype != QUOTED_STRING:
+            if self.multiline:
+                raise dns.exception.SyntaxError('unbalanced parentheses')
+            ttype = EOF
+        return Token(ttype, token, has_escape)
+
+    def unget(self, token):
+        """Unget a token.
+
+        The unget buffer for tokens is only one token large; it is
+        an error to try to unget a token when the unget buffer is not
+        empty.
+
+        @param token: the token to unget
+        @type token: Token object
+        @raises UngetBufferFull: there is already an ungotten token
+        """
+
+        if self.ungotten_token is not None:
+            raise UngetBufferFull
+        self.ungotten_token = token
+
+    def next(self):
+        """Return the next item in an iteration.
+        @rtype: (int, string)
+        """
+
+        token = self.get()
+        if token.is_eof():
+            raise StopIteration
+        return token
+
+    __next__ = next
+
+    def __iter__(self):
+        return self
+
+    # Helpers
+
+    def get_int(self):
+        """Read the next token and interpret it as an integer.
+
+        @raises dns.exception.SyntaxError:
+        @rtype: int
+        """
+
+        token = self.get().unescape()
+        if not token.is_identifier():
+            raise dns.exception.SyntaxError('expecting an identifier')
+        if not token.value.isdigit():
+            raise dns.exception.SyntaxError('expecting an integer')
+        return int(token.value)
+
+    def get_uint8(self):
+        """Read the next token and interpret it as an 8-bit unsigned
+        integer.
+
+        @raises dns.exception.SyntaxError:
+        @rtype: int
+        """
+
+        value = self.get_int()
+        if value < 0 or value > 255:
+            raise dns.exception.SyntaxError(
+                '%d is not an unsigned 8-bit integer' % value)
+        return value
+
+    def get_uint16(self):
+        """Read the next token and interpret it as a 16-bit unsigned
+        integer.
+
+        @raises dns.exception.SyntaxError:
+        @rtype: int
+        """
+
+        value = self.get_int()
+        if value < 0 or value > 65535:
+            raise dns.exception.SyntaxError(
+                '%d is not an unsigned 16-bit integer' % value)
+        return value
+
+    def get_uint32(self):
+        """Read the next token and interpret it as a 32-bit unsigned
+        integer.
+
+        @raises dns.exception.SyntaxError:
+        @rtype: int
+        """
+
+        token = self.get().unescape()
+        if not token.is_identifier():
+            raise dns.exception.SyntaxError('expecting an identifier')
+        if not token.value.isdigit():
+            raise dns.exception.SyntaxError('expecting an integer')
+        value = long(token.value)
+        if value < 0 or value > long(4294967296):
+            raise dns.exception.SyntaxError(
+                '%d is not an unsigned 32-bit integer' % value)
+        return value
+
+    def get_string(self, origin=None):
+        """Read the next token and interpret it as a string.
+
+        @raises dns.exception.SyntaxError:
+        @rtype: string
+        """
+
+        token = self.get().unescape()
+        if not (token.is_identifier() or token.is_quoted_string()):
+            raise dns.exception.SyntaxError('expecting a string')
+        return token.value
+
+    def get_identifier(self, origin=None):
+        """Read the next token and raise an exception if it is not an identifier.
+
+        @raises dns.exception.SyntaxError:
+        @rtype: string
+        """
+
+        token = self.get().unescape()
+        if not token.is_identifier():
+            raise dns.exception.SyntaxError('expecting an identifier')
+        return token.value
+
+    def get_name(self, origin=None):
+        """Read the next token and interpret it as a DNS name.
+
+        @raises dns.exception.SyntaxError:
+        @rtype: dns.name.Name object"""
+
+        token = self.get()
+        if not token.is_identifier():
+            raise dns.exception.SyntaxError('expecting an identifier')
+        return dns.name.from_text(token.value, origin)
+
+    def get_eol(self):
+        """Read the next token and raise an exception if it isn't EOL or
+        EOF.
+
+        @raises dns.exception.SyntaxError:
+        @rtype: string
+        """
+
+        token = self.get()
+        if not token.is_eol_or_eof():
+            raise dns.exception.SyntaxError(
+                'expected EOL or EOF, got %d "%s"' % (token.ttype,
+                                                      token.value))
+        return token.value
+
+    def get_ttl(self):
+        token = self.get().unescape()
+        if not token.is_identifier():
+            raise dns.exception.SyntaxError('expecting an identifier')
+        return dns.ttl.from_text(token.value)

eventlet/support/dns/tsig.py

@@ -0,0 +1,234 @@
+# Copyright (C) 2001-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""DNS TSIG support."""
+
+import hmac
+import struct
+
+import dns.exception
+import dns.hash
+import dns.rdataclass
+import dns.name
+from ._compat import long, string_types, text_type
+
+class BadTime(dns.exception.DNSException):
+
+    """The current time is not within the TSIG's validity time."""
+
+
+class BadSignature(dns.exception.DNSException):
+
+    """The TSIG signature fails to verify."""
+
+
+class PeerError(dns.exception.DNSException):
+
+    """Base class for all TSIG errors generated by the remote peer"""
+
+
+class PeerBadKey(PeerError):
+
+    """The peer didn't know the key we used"""
+
+
+class PeerBadSignature(PeerError):
+
+    """The peer didn't like the signature we sent"""
+
+
+class PeerBadTime(PeerError):
+
+    """The peer didn't like the time we sent"""
+
+
+class PeerBadTruncation(PeerError):
+
+    """The peer didn't like amount of truncation in the TSIG we sent"""
+
+# TSIG Algorithms
+
+HMAC_MD5 = dns.name.from_text("HMAC-MD5.SIG-ALG.REG.INT")
+HMAC_SHA1 = dns.name.from_text("hmac-sha1")
+HMAC_SHA224 = dns.name.from_text("hmac-sha224")
+HMAC_SHA256 = dns.name.from_text("hmac-sha256")
+HMAC_SHA384 = dns.name.from_text("hmac-sha384")
+HMAC_SHA512 = dns.name.from_text("hmac-sha512")
+
+_hashes = {
+    HMAC_SHA224: 'SHA224',
+    HMAC_SHA256: 'SHA256',
+    HMAC_SHA384: 'SHA384',
+    HMAC_SHA512: 'SHA512',
+    HMAC_SHA1: 'SHA1',
+    HMAC_MD5: 'MD5',
+}
+
+default_algorithm = HMAC_MD5
+
+BADSIG = 16
+BADKEY = 17
+BADTIME = 18
+BADTRUNC = 22
+
+
+def sign(wire, keyname, secret, time, fudge, original_id, error,
+         other_data, request_mac, ctx=None, multi=False, first=True,
+         algorithm=default_algorithm):
+    """Return a (tsig_rdata, mac, ctx) tuple containing the HMAC TSIG rdata
+    for the input parameters, the HMAC MAC calculated by applying the
+    TSIG signature algorithm, and the TSIG digest context.
+    @rtype: (string, string, hmac.HMAC object)
+    @raises ValueError: I{other_data} is too long
+    @raises NotImplementedError: I{algorithm} is not supported
+    """
+
+    if isinstance(other_data, text_type):
+        other_data = other_data.encode()
+    (algorithm_name, digestmod) = get_algorithm(algorithm)
+    if first:
+        ctx = hmac.new(secret, digestmod=digestmod)
+        ml = len(request_mac)
+        if ml > 0:
+            ctx.update(struct.pack('!H', ml))
+            ctx.update(request_mac)
+    id = struct.pack('!H', original_id)
+    ctx.update(id)
+    ctx.update(wire[2:])
+    if first:
+        ctx.update(keyname.to_digestable())
+        ctx.update(struct.pack('!H', dns.rdataclass.ANY))
+        ctx.update(struct.pack('!I', 0))
+    long_time = time + long(0)
+    upper_time = (long_time >> 32) & long(0xffff)
+    lower_time = long_time & long(0xffffffff)
+    time_mac = struct.pack('!HIH', upper_time, lower_time, fudge)
+    pre_mac = algorithm_name + time_mac
+    ol = len(other_data)
+    if ol > 65535:
+        raise ValueError('TSIG Other Data is > 65535 bytes')
+    post_mac = struct.pack('!HH', error, ol) + other_data
+    if first:
+        ctx.update(pre_mac)
+        ctx.update(post_mac)
+    else:
+        ctx.update(time_mac)
+    mac = ctx.digest()
+    mpack = struct.pack('!H', len(mac))
+    tsig_rdata = pre_mac + mpack + mac + id + post_mac
+    if multi:
+        ctx = hmac.new(secret, digestmod=digestmod)
+        ml = len(mac)
+        ctx.update(struct.pack('!H', ml))
+        ctx.update(mac)
+    else:
+        ctx = None
+    return (tsig_rdata, mac, ctx)
+
+
+def hmac_md5(wire, keyname, secret, time, fudge, original_id, error,
+             other_data, request_mac, ctx=None, multi=False, first=True,
+             algorithm=default_algorithm):
+    return sign(wire, keyname, secret, time, fudge, original_id, error,
+                other_data, request_mac, ctx, multi, first, algorithm)
+
+
+def validate(wire, keyname, secret, now, request_mac, tsig_start, tsig_rdata,
+             tsig_rdlen, ctx=None, multi=False, first=True):
+    """Validate the specified TSIG rdata against the other input parameters.
+
+    @raises FormError: The TSIG is badly formed.
+    @raises BadTime: There is too much time skew between the client and the
+    server.
+    @raises BadSignature: The TSIG signature did not validate
+    @rtype: hmac.HMAC object"""
+
+    (adcount,) = struct.unpack("!H", wire[10:12])
+    if adcount == 0:
+        raise dns.exception.FormError
+    adcount -= 1
+    new_wire = wire[0:10] + struct.pack("!H", adcount) + wire[12:tsig_start]
+    current = tsig_rdata
+    (aname, used) = dns.name.from_wire(wire, current)
+    current = current + used
+    (upper_time, lower_time, fudge, mac_size) = \
+        struct.unpack("!HIHH", wire[current:current + 10])
+    time = ((upper_time + long(0)) << 32) + (lower_time + long(0))
+    current += 10
+    mac = wire[current:current + mac_size]
+    current += mac_size
+    (original_id, error, other_size) = \
+        struct.unpack("!HHH", wire[current:current + 6])
+    current += 6
+    other_data = wire[current:current + other_size]
+    current += other_size
+    if current != tsig_rdata + tsig_rdlen:
+        raise dns.exception.FormError
+    if error != 0:
+        if error == BADSIG:
+            raise PeerBadSignature
+        elif error == BADKEY:
+            raise PeerBadKey
+        elif error == BADTIME:
+            raise PeerBadTime
+        elif error == BADTRUNC:
+            raise PeerBadTruncation
+        else:
+            raise PeerError('unknown TSIG error code %d' % error)
+    time_low = time - fudge
+    time_high = time + fudge
+    if now < time_low or now > time_high:
+        raise BadTime
+    (junk, our_mac, ctx) = sign(new_wire, keyname, secret, time, fudge,
+                                original_id, error, other_data,
+                                request_mac, ctx, multi, first, aname)
+    if our_mac != mac:
+        raise BadSignature
+    return ctx
+
+
+def get_algorithm(algorithm):
+    """Returns the wire format string and the hash module to use for the
+    specified TSIG algorithm
+
+    @rtype: (string, hash constructor)
+    @raises NotImplementedError: I{algorithm} is not supported
+    """
+
+    if isinstance(algorithm, string_types):
+        algorithm = dns.name.from_text(algorithm)
+
+    try:
+        return (algorithm.to_digestable(), dns.hash.hashes[_hashes[algorithm]])
+    except KeyError:
+        raise NotImplementedError("TSIG algorithm " + str(algorithm) +
+                                  " is not supported")
+
+
+def get_algorithm_and_mac(wire, tsig_rdata, tsig_rdlen):
+    """Return the tsig algorithm for the specified tsig_rdata
+    @raises FormError: The TSIG is badly formed.
+    """
+    current = tsig_rdata
+    (aname, used) = dns.name.from_wire(wire, current)
+    current = current + used
+    (upper_time, lower_time, fudge, mac_size) = \
+        struct.unpack("!HIHH", wire[current:current + 10])
+    current += 10
+    mac = wire[current:current + mac_size]
+    current += mac_size
+    if current > tsig_rdata + tsig_rdlen:
+        raise dns.exception.FormError
+    return (aname, mac)

eventlet/support/dns/tsigkeyring.py

@@ -0,0 +1,48 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""A place to store TSIG keys."""
+
+from dns._compat import maybe_decode, maybe_encode
+
+import base64
+
+import dns.name
+
+
+def from_text(textring):
+    """Convert a dictionary containing (textual DNS name, base64 secret) pairs
+    into a binary keyring which has (dns.name.Name, binary secret) pairs.
+    @rtype: dict"""
+
+    keyring = {}
+    for keytext in textring:
+        keyname = dns.name.from_text(keytext)
+        secret = base64.decodestring(maybe_encode(textring[keytext]))
+        keyring[keyname] = secret
+    return keyring
+
+
+def to_text(keyring):
+    """Convert a dictionary containing (dns.name.Name, binary secret) pairs
+    into a text keyring which has (textual DNS name, base64 secret) pairs.
+    @rtype: dict"""
+
+    textring = {}
+    for keyname in keyring:
+        keytext = maybe_decode(keyname.to_text())
+        secret = maybe_decode(base64.encodestring(keyring[keyname]))
+        textring[keytext] = secret
+    return textring

eventlet/support/dns/ttl.py

@@ -0,0 +1,68 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""DNS TTL conversion."""
+
+import dns.exception
+from ._compat import long
+
+
+class BadTTL(dns.exception.SyntaxError):
+
+    """DNS TTL value is not well-formed."""
+
+
+def from_text(text):
+    """Convert the text form of a TTL to an integer.
+
+    The BIND 8 units syntax for TTLs (e.g. '1w6d4h3m10s') is supported.
+
+    @param text: the textual TTL
+    @type text: string
+    @raises dns.ttl.BadTTL: the TTL is not well-formed
+    @rtype: int
+    """
+
+    if text.isdigit():
+        total = long(text)
+    else:
+        if not text[0].isdigit():
+            raise BadTTL
+        total = long(0)
+        current = long(0)
+        for c in text:
+            if c.isdigit():
+                current *= 10
+                current += long(c)
+            else:
+                c = c.lower()
+                if c == 'w':
+                    total += current * long(604800)
+                elif c == 'd':
+                    total += current * long(86400)
+                elif c == 'h':
+                    total += current * long(3600)
+                elif c == 'm':
+                    total += current * long(60)
+                elif c == 's':
+                    total += current
+                else:
+                    raise BadTTL("unknown unit '%s'" % c)
+                current = 0
+        if not current == 0:
+            raise BadTTL("trailing integer")
+    if total < long(0) or total > long(2147483647):
+        raise BadTTL("TTL should be between 0 and 2^31 - 1 (inclusive)")
+    return total

eventlet/support/dns/update.py

@@ -0,0 +1,249 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""DNS Dynamic Update Support"""
+
+
+import dns.message
+import dns.name
+import dns.opcode
+import dns.rdata
+import dns.rdataclass
+import dns.rdataset
+import dns.tsig
+from ._compat import string_types
+
+
+class Update(dns.message.Message):
+
+    def __init__(self, zone, rdclass=dns.rdataclass.IN, keyring=None,
+                 keyname=None, keyalgorithm=dns.tsig.default_algorithm):
+        """Initialize a new DNS Update object.
+
+        @param zone: The zone which is being updated.
+        @type zone: A dns.name.Name or string
+        @param rdclass: The class of the zone; defaults to dns.rdataclass.IN.
+        @type rdclass: An int designating the class, or a string whose value
+        is the name of a class.
+        @param keyring: The TSIG keyring to use; defaults to None.
+        @type keyring: dict
+        @param keyname: The name of the TSIG key to use; defaults to None.
+        The key must be defined in the keyring.  If a keyring is specified
+        but a keyname is not, then the key used will be the first key in the
+        keyring.  Note that the order of keys in a dictionary is not defined,
+        so applications should supply a keyname when a keyring is used, unless
+        they know the keyring contains only one key.
+        @type keyname: dns.name.Name or string
+        @param keyalgorithm: The TSIG algorithm to use; defaults to
+        dns.tsig.default_algorithm.  Constants for TSIG algorithms are defined
+        in dns.tsig, and the currently implemented algorithms are
+        HMAC_MD5, HMAC_SHA1, HMAC_SHA224, HMAC_SHA256, HMAC_SHA384, and
+        HMAC_SHA512.
+        @type keyalgorithm: string
+        """
+        super(Update, self).__init__()
+        self.flags |= dns.opcode.to_flags(dns.opcode.UPDATE)
+        if isinstance(zone, string_types):
+            zone = dns.name.from_text(zone)
+        self.origin = zone
+        if isinstance(rdclass, string_types):
+            rdclass = dns.rdataclass.from_text(rdclass)
+        self.zone_rdclass = rdclass
+        self.find_rrset(self.question, self.origin, rdclass, dns.rdatatype.SOA,
+                        create=True, force_unique=True)
+        if keyring is not None:
+            self.use_tsig(keyring, keyname, algorithm=keyalgorithm)
+
+    def _add_rr(self, name, ttl, rd, deleting=None, section=None):
+        """Add a single RR to the update section."""
+
+        if section is None:
+            section = self.authority
+        covers = rd.covers()
+        rrset = self.find_rrset(section, name, self.zone_rdclass, rd.rdtype,
+                                covers, deleting, True, True)
+        rrset.add(rd, ttl)
+
+    def _add(self, replace, section, name, *args):
+        """Add records.  The first argument is the replace mode.  If
+        false, RRs are added to an existing RRset; if true, the RRset
+        is replaced with the specified contents.  The second
+        argument is the section to add to.  The third argument
+        is always a name.  The other arguments can be:
+
+                - rdataset...
+
+                - ttl, rdata...
+
+                - ttl, rdtype, string..."""
+
+        if isinstance(name, string_types):
+            name = dns.name.from_text(name, None)
+        if isinstance(args[0], dns.rdataset.Rdataset):
+            for rds in args:
+                if replace:
+                    self.delete(name, rds.rdtype)
+                for rd in rds:
+                    self._add_rr(name, rds.ttl, rd, section=section)
+        else:
+            args = list(args)
+            ttl = int(args.pop(0))
+            if isinstance(args[0], dns.rdata.Rdata):
+                if replace:
+                    self.delete(name, args[0].rdtype)
+                for rd in args:
+                    self._add_rr(name, ttl, rd, section=section)
+            else:
+                rdtype = args.pop(0)
+                if isinstance(rdtype, string_types):
+                    rdtype = dns.rdatatype.from_text(rdtype)
+                if replace:
+                    self.delete(name, rdtype)
+                for s in args:
+                    rd = dns.rdata.from_text(self.zone_rdclass, rdtype, s,
+                                             self.origin)
+                    self._add_rr(name, ttl, rd, section=section)
+
+    def add(self, name, *args):
+        """Add records.  The first argument is always a name.  The other
+        arguments can be:
+
+                - rdataset...
+
+                - ttl, rdata...
+
+                - ttl, rdtype, string..."""
+        self._add(False, self.authority, name, *args)
+
+    def delete(self, name, *args):
+        """Delete records.  The first argument is always a name.  The other
+        arguments can be:
+
+                - I{nothing}
+
+                - rdataset...
+
+                - rdata...
+
+                - rdtype, [string...]"""
+
+        if isinstance(name, string_types):
+            name = dns.name.from_text(name, None)
+        if len(args) == 0:
+            self.find_rrset(self.authority, name, dns.rdataclass.ANY,
+                            dns.rdatatype.ANY, dns.rdatatype.NONE,
+                            dns.rdatatype.ANY, True, True)
+        elif isinstance(args[0], dns.rdataset.Rdataset):
+            for rds in args:
+                for rd in rds:
+                    self._add_rr(name, 0, rd, dns.rdataclass.NONE)
+        else:
+            args = list(args)
+            if isinstance(args[0], dns.rdata.Rdata):
+                for rd in args:
+                    self._add_rr(name, 0, rd, dns.rdataclass.NONE)
+            else:
+                rdtype = args.pop(0)
+                if isinstance(rdtype, string_types):
+                    rdtype = dns.rdatatype.from_text(rdtype)
+                if len(args) == 0:
+                    self.find_rrset(self.authority, name,
+                                    self.zone_rdclass, rdtype,
+                                    dns.rdatatype.NONE,
+                                    dns.rdataclass.ANY,
+                                    True, True)
+                else:
+                    for s in args:
+                        rd = dns.rdata.from_text(self.zone_rdclass, rdtype, s,
+                                                 self.origin)
+                        self._add_rr(name, 0, rd, dns.rdataclass.NONE)
+
+    def replace(self, name, *args):
+        """Replace records.  The first argument is always a name.  The other
+        arguments can be:
+
+                - rdataset...
+
+                - ttl, rdata...
+
+                - ttl, rdtype, string...
+
+        Note that if you want to replace the entire node, you should do
+        a delete of the name followed by one or more calls to add."""
+
+        self._add(True, self.authority, name, *args)
+
+    def present(self, name, *args):
+        """Require that an owner name (and optionally an rdata type,
+        or specific rdataset) exists as a prerequisite to the
+        execution of the update.  The first argument is always a name.
+        The other arguments can be:
+
+                - rdataset...
+
+                - rdata...
+
+                - rdtype, string..."""
+
+        if isinstance(name, string_types):
+            name = dns.name.from_text(name, None)
+        if len(args) == 0:
+            self.find_rrset(self.answer, name,
+                            dns.rdataclass.ANY, dns.rdatatype.ANY,
+                            dns.rdatatype.NONE, None,
+                            True, True)
+        elif isinstance(args[0], dns.rdataset.Rdataset) or \
+            isinstance(args[0], dns.rdata.Rdata) or \
+                len(args) > 1:
+            if not isinstance(args[0], dns.rdataset.Rdataset):
+                # Add a 0 TTL
+                args = list(args)
+                args.insert(0, 0)
+            self._add(False, self.answer, name, *args)
+        else:
+            rdtype = args[0]
+            if isinstance(rdtype, string_types):
+                rdtype = dns.rdatatype.from_text(rdtype)
+            self.find_rrset(self.answer, name,
+                            dns.rdataclass.ANY, rdtype,
+                            dns.rdatatype.NONE, None,
+                            True, True)
+
+    def absent(self, name, rdtype=None):
+        """Require that an owner name (and optionally an rdata type) does
+        not exist as a prerequisite to the execution of the update."""
+
+        if isinstance(name, string_types):
+            name = dns.name.from_text(name, None)
+        if rdtype is None:
+            self.find_rrset(self.answer, name,
+                            dns.rdataclass.NONE, dns.rdatatype.ANY,
+                            dns.rdatatype.NONE, None,
+                            True, True)
+        else:
+            if isinstance(rdtype, string_types):
+                rdtype = dns.rdatatype.from_text(rdtype)
+            self.find_rrset(self.answer, name,
+                            dns.rdataclass.NONE, rdtype,
+                            dns.rdatatype.NONE, None,
+                            True, True)
+
+    def to_wire(self, origin=None, max_size=65535):
+        """Return a string containing the update in DNS compressed wire
+        format.
+        @rtype: string"""
+        if origin is None:
+            origin = self.origin
+        return super(Update, self).to_wire(origin, max_size)

eventlet/support/dns/version.py

@@ -0,0 +1,34 @@
+# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""dnspython release version information."""
+
+MAJOR = 1
+MINOR = 15
+MICRO = 0
+RELEASELEVEL = 0x0f
+SERIAL = 0
+
+if RELEASELEVEL == 0x0f:
+    version = '%d.%d.%d' % (MAJOR, MINOR, MICRO)
+elif RELEASELEVEL == 0x00:
+    version = '%d.%d.%dx%d' % \
+              (MAJOR, MINOR, MICRO, SERIAL)
+else:
+    version = '%d.%d.%d%x%d' % \
+              (MAJOR, MINOR, MICRO, RELEASELEVEL, SERIAL)
+
+hexversion = MAJOR << 24 | MINOR << 16 | MICRO << 8 | RELEASELEVEL << 4 | \
+    SERIAL

eventlet/support/dns/wiredata.py

@@ -0,0 +1,84 @@
+# Copyright (C) 2011 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""DNS Wire Data Helper"""
+
+
+import dns.exception
+from ._compat import binary_type, string_types
+
+# Figure out what constant python passes for an unspecified slice bound.
+# It's supposed to be sys.maxint, yet on 64-bit windows sys.maxint is 2^31 - 1
+# but Python uses 2^63 - 1 as the constant.  Rather than making pointless
+# extra comparisons, duplicating code, or weakening WireData, we just figure
+# out what constant Python will use.
+
+
+class _SliceUnspecifiedBound(str):
+
+    def __getslice__(self, i, j):
+        return j
+
+_unspecified_bound = _SliceUnspecifiedBound('')[1:]
+
+
+class WireData(binary_type):
+    # WireData is a string with stricter slicing
+
+    def __getitem__(self, key):
+        try:
+            if isinstance(key, slice):
+                return WireData(super(WireData, self).__getitem__(key))
+            return bytearray(self.unwrap())[key]
+        except IndexError:
+            raise dns.exception.FormError
+
+    def __getslice__(self, i, j):
+        try:
+            if j == _unspecified_bound:
+                # handle the case where the right bound is unspecified
+                j = len(self)
+            if i < 0 or j < 0:
+                raise dns.exception.FormError
+            # If it's not an empty slice, access left and right bounds
+            # to make sure they're valid
+            if i != j:
+                super(WireData, self).__getitem__(i)
+                super(WireData, self).__getitem__(j - 1)
+            return WireData(super(WireData, self).__getslice__(i, j))
+        except IndexError:
+            raise dns.exception.FormError
+
+    def __iter__(self):
+        i = 0
+        while 1:
+            try:
+                yield self[i]
+                i += 1
+            except dns.exception.FormError:
+                raise StopIteration
+
+    def unwrap(self):
+        return binary_type(self)
+
+
+def maybe_wrap(wire):
+    if isinstance(wire, WireData):
+        return wire
+    elif isinstance(wire, binary_type):
+        return WireData(wire)
+    elif isinstance(wire, string_types):
+        return WireData(wire.encode())
+    raise ValueError("unhandled type %s" % type(wire))

eventlet/support/greendns.py

@@ -33,6 +33,7 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 import struct
+import sys
 
 from eventlet import patcher
 from eventlet.green import _socket_nodns
@@ -47,27 +48,29 @@ def import_patched(module_name):
     # regular evenlet.green.socket imports *this* module and if we imported
     # it back we'd end with an import cycle (socket -> greendns -> socket).
     # We break this import cycle by providing a restricted socket module.
-    return patcher.import_patched(module_name,
-                                  select=select,
-                                  time=time,
-                                  os=os,
-                                  socket=_socket_nodns)
+    # if (module_name + '.').startswith('dns.'):
+    #     module_name = 'eventlet.support.' + module_name
+    modules = {
+        'select': select,
+        'time': time,
+        'os': os,
+        'socket': _socket_nodns,
+    }
+    return patcher.import_patched(module_name, **modules)
 
 
+sys.path.insert(0, os.path.abspath(os.path.dirname(__file__)))
 dns = import_patched('dns')
-dns.resolver = import_patched('dns.resolver')
-
-for pkg in ('dns.entropy', 'dns.inet', 'dns.query'):
-    setattr(dns, pkg.split('.')[1], import_patched(pkg))
-
-import dns.rdtypes
-for pkg in ['dns.rdtypes.IN', 'dns.rdtypes.ANY']:
-    setattr(dns.rdtypes, pkg.split('.')[-1], import_patched(pkg))
-for pkg in ['dns.rdtypes.IN.A', 'dns.rdtypes.IN.AAAA']:
-    setattr(dns.rdtypes.IN, pkg.split('.')[-1], import_patched(pkg))
-for pkg in ['dns.rdtypes.ANY.CNAME']:
-    setattr(dns.rdtypes.ANY, pkg.split('.')[-1], import_patched(pkg))
+for pkg in dns.__all__:
+    setattr(dns, pkg, import_patched('dns.' + pkg))
+for pkg in dns.rdtypes.__all__:
+    setattr(dns.rdtypes, pkg, import_patched('dns.rdtypes.' + pkg))
+for pkg in dns.rdtypes.IN.__all__:
+    setattr(dns.rdtypes.IN, pkg, import_patched('dns.rdtypes.IN.' + pkg))
+for pkg in dns.rdtypes.ANY.__all__:
+    setattr(dns.rdtypes.ANY, pkg, import_patched('dns.rdtypes.ANY.' + pkg))
 del import_patched
+sys.path.pop(0)
 
 
 socket = _socket_nodns
@@ -292,12 +295,11 @@ class ResolverProxy(object):
         """
         self._hosts = hosts_resolver
         self._filename = filename
-        self._resolver = dns.resolver.Resolver(filename=self._filename)
-        self._resolver.cache = dns.resolver.LRUCache()
+        self.clear()
 
     def clear(self):
         self._resolver = dns.resolver.Resolver(filename=self._filename)
-        self._resolver.cache = dns.resolver.Cache()
+        self._resolver.cache = dns.resolver.LRUCache()
 
     def query(self, qname, rdtype=dns.rdatatype.A, rdclass=dns.rdataclass.IN,
               tcp=False, source=None, raise_on_no_answer=True):

tests/greendns_test.py

@@ -8,11 +8,8 @@ import time
 
 import tests
 from tests import mock
-try:
-    from eventlet.support import greendns
-    from eventlet.support.greendns import dns
-except ImportError:
-    __test__ = False
+from eventlet.support import greendns
+from eventlet.support.greendns import dns
 
 
 class TestHostsResolver(tests.LimitedTestCase):

tests/isolated/greendns_from_address_203.py

@@ -1,13 +1,8 @@
 __test__ = False
 
 if __name__ == '__main__':
-    import sys
     import eventlet
-    try:
-        from dns import reversename
-    except ImportError:
-        print('skip:require dns (package dnspython)')
-        sys.exit(1)
+    from eventlet.support.dns import reversename
     eventlet.monkey_patch(all=True)
     reversename.from_address('127.0.0.1')
     print('pass')

tests/isolated/socket_resolve_green.py

@@ -0,0 +1,45 @@
+__test__ = False
+
+if __name__ == '__main__':
+    import eventlet
+    eventlet.monkey_patch(all=True)
+    import socket
+    import time
+    import dns.message
+    import dns.query
+
+    def slow_udp(q, *a, **kw):
+        addr = '0.0.0.1'
+        if 'host2' in str(q.question):
+            addr = '0.0.0.2'
+        if 'host3' in str(q.question):
+            addr = '0.0.0.3'
+        r = dns.message.make_response(q)
+        r.index = None
+        r.flags = 256
+        r.answer.append(dns.rrset.from_text(str(q.question[0].name), 60, 'IN', 'A', addr))
+        r.time = 0.001
+        eventlet.sleep(0.1)
+        return r
+
+    dns.query.udp = slow_udp
+    results = {}
+
+    def fun(name):
+        try:
+            results[name] = socket.gethostbyname(name)
+        except socket.error as e:
+            print('name: {0} error: {1}'.format(name, e))
+
+    pool = eventlet.GreenPool()
+    t1 = time.time()
+    pool.spawn(fun, 'eventlet-test-host1.')
+    pool.spawn(fun, 'eventlet-test-host2.')
+    pool.spawn(fun, 'eventlet-test-host3.')
+    pool.waitall()
+    td = time.time() - t1
+    assert 0.1 <= td < 0.3, 'Resolve time expected: ~0.1s, real: {0:.3f}'.format(td)
+    assert results.get('eventlet-test-host1.') == '0.0.0.1'
+    assert results.get('eventlet-test-host2.') == '0.0.0.2'
+    assert results.get('eventlet-test-host3.') == '0.0.0.3'
+    print('pass')

tests/socket_test.py

@@ -1,11 +1,11 @@
+import os
+import shutil
+import sys
+import tempfile
 import eventlet
 from eventlet.green import socket
-try:
-    from eventlet.support import greendns
-    has_greendns = True
-except ImportError:
-    has_greendns = False
-from tests import skip_if
+from eventlet.support import greendns
+import tests
 
 
 def test_create_connection_error():
@@ -37,13 +37,26 @@ def test_recv_type():
     assert isinstance(s, bytes)
 
 
-@skip_if(not has_greendns)
 def test_dns_methods_are_green():
     assert socket.gethostbyname is greendns.gethostbyname
     assert socket.gethostbyname_ex is greendns.gethostbyname_ex
     assert socket.getaddrinfo is greendns.getaddrinfo
     assert socket.getnameinfo is greendns.getnameinfo
 
+    # https://github.com/eventlet/eventlet/pull/341
+    # mock older dnspython in system packages
+    mock_sys_pkg_dir = tempfile.mkdtemp('eventlet_test_dns_methods_are_green')
+    try:
+        with open(mock_sys_pkg_dir + '/dns.py', 'wb') as f:
+            f.write(b'raise Exception("Your IP address string is so illegal ' +
+                    b'it prevents installing packages.")\n')
+        tests.run_isolated(
+            'socket_resolve_green.py',
+            env={'PYTHONPATH': os.pathsep.join(sys.path + [mock_sys_pkg_dir])},
+        )
+    finally:
+        shutil.rmtree(mock_sys_pkg_dir)
+
 
 def test_socket_api_family():
     # It was named family_or_realsock