858aec4cef
Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp> Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
75 lines
1.8 KiB
Python
75 lines
1.8 KiB
Python
# Copyright (C) 2014 Nippon Telegraph and Telephone Corporation.
|
|
# Copyright (C) 2014 YAMAMOTO Takashi <yamamoto at valinux co jp>
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
|
|
# implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
import platform
|
|
import socket
|
|
import struct
|
|
|
|
from ryu.lib import addrconv
|
|
|
|
|
|
system = platform.system()
|
|
if system == 'Linux':
|
|
# on linux,
|
|
# no ss_len
|
|
# u16 ss_family
|
|
_HDR_FMT = "H"
|
|
_HAVE_SS_LEN = False
|
|
else:
|
|
# assume
|
|
# u8 ss_len
|
|
# u8 ss_family
|
|
_HDR_FMT = "BB"
|
|
_HAVE_SS_LEN = True
|
|
|
|
|
|
# RFC 2553
|
|
_SS_MAXSIZE = 128
|
|
_SS_ALIGNSIZE = 8
|
|
|
|
_SIN_SIZE = 16 # sizeof(struct sockaddr_in)
|
|
|
|
_HDR_LEN = struct.calcsize(_HDR_FMT)
|
|
|
|
|
|
def _hdr(ss_len, af):
|
|
if _HAVE_SS_LEN:
|
|
return struct.pack(_HDR_FMT, ss_len, af)
|
|
else:
|
|
return struct.pack(_HDR_FMT, af)
|
|
|
|
|
|
def _pad_to(data, total_len):
|
|
pad_len = total_len - len(data)
|
|
return data + pad_len * '\0'
|
|
|
|
|
|
def sa_in4(addr, port=0):
|
|
data = struct.pack("!H4s", port, addrconv.ipv4.text_to_bin(addr))
|
|
hdr = _hdr(_SIN_SIZE, socket.AF_INET)
|
|
return _pad_to(hdr + data, _SIN_SIZE)
|
|
|
|
|
|
def sa_in6(addr, port=0, flowinfo=0, scope_id=0):
|
|
data = struct.pack("!HI16sI", port, flowinfo,
|
|
addrconv.ipv6.text_to_bin(addr), scope_id)
|
|
hdr = _hdr(_HDR_LEN + len(data), socket.AF_INET6)
|
|
return hdr + data
|
|
|
|
|
|
def sa_to_ss(sa):
|
|
return _pad_to(sa, _SS_MAXSIZE)
|