openstack/os-ken
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unmaintained/victoria
os-ken/os_ken/ofproto/ofproto_v1_2_parser.py
Hongbin Lu eb94ee01bc Rename "ryu" to "os_ken" everywhere 
Change-Id: Id227a6672fb89cd512b17cddfb1fce7bb22fb0c8
2018-11-27 20:48:02 +00:00

4672 lines
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# Copyright (C) 2012 Nippon Telegraph and Telephone Corporation.
# Copyright (C) 2012 Isaku Yamahata <yamahata 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.
"""
Decoder/Encoder implementations of OpenFlow 1.2.
"""
import struct
import base64
import six
from os_ken.lib import addrconv
from os_ken.lib import mac
from os_ken.lib.pack_utils import msg_pack_into
from os_ken.lib.packet import packet
from os_ken import utils
from os_ken.ofproto.ofproto_parser import StringifyMixin, MsgBase
from os_ken.ofproto import ether
from os_ken.ofproto import ofproto_parser
from os_ken.ofproto import ofproto_v1_2 as ofproto
import logging
LOG = logging.getLogger('os_ken.ofproto.ofproto_v1_2_parser')
_MSG_PARSERS = {}
def _set_msg_type(msg_type):
def _set_cls_msg_type(cls):
cls.cls_msg_type = msg_type
return cls
return _set_cls_msg_type
def _register_parser(cls):
'''class decorator to register msg parser'''
assert cls.cls_msg_type is not None
assert cls.cls_msg_type not in _MSG_PARSERS
_MSG_PARSERS[cls.cls_msg_type] = cls.parser
return cls
@ofproto_parser.register_msg_parser(ofproto.OFP_VERSION)
def msg_parser(datapath, version, msg_type, msg_len, xid, buf):
parser = _MSG_PARSERS.get(msg_type)
return parser(datapath, version, msg_type, msg_len, xid, buf)
@_register_parser
@_set_msg_type(ofproto.OFPT_HELLO)
class OFPHello(MsgBase):
"""
Hello message
When connection is started, the hello message is exchanged between a
switch and a controller.
This message is handled by the OSKen framework, so the OSKen application
do not need to process this typically.
"""
def __init__(self, datapath):
super(OFPHello, self).__init__(datapath)
@_register_parser
@_set_msg_type(ofproto.OFPT_ERROR)
class OFPErrorMsg(MsgBase):
"""
Error message
The switch notifies controller of problems by this message.
========== =========================================================
Attribute Description
========== =========================================================
type High level type of error
code Details depending on the type
data Variable length data depending on the type and code
========== =========================================================
``type`` attribute corresponds to ``type_`` parameter of __init__.
Types and codes are defined in ``os_ken.ofproto.ofproto``.
============================= ===========
Type Code
============================= ===========
OFPET_HELLO_FAILED OFPHFC_*
OFPET_BAD_REQUEST OFPBRC_*
OFPET_BAD_ACTION OFPBAC_*
OFPET_BAD_INSTRUCTION OFPBIC_*
OFPET_BAD_MATCH OFPBMC_*
OFPET_FLOW_MOD_FAILED OFPFMFC_*
OFPET_GROUP_MOD_FAILED OFPGMFC_*
OFPET_PORT_MOD_FAILED OFPPMFC_*
OFPET_TABLE_MOD_FAILED OFPTMFC_*
OFPET_QUEUE_OP_FAILED OFPQOFC_*
OFPET_SWITCH_CONFIG_FAILED OFPSCFC_*
OFPET_ROLE_REQUEST_FAILED OFPRRFC_*
OFPET_EXPERIMENTER N/A
============================= ===========
If ``type == OFPET_EXPERIMENTER``, this message has also the following
attributes.
============= ======================================================
Attribute Description
============= ======================================================
exp_type Experimenter defined type
experimenter Experimenter ID
============= ======================================================
Example::
@set_ev_cls(ofp_event.EventOFPErrorMsg,
[HANDSHAKE_DISPATCHER, CONFIG_DISPATCHER, MAIN_DISPATCHER])
def error_msg_handler(self, ev):
msg = ev.msg
self.logger.debug('OFPErrorMsg received: type=0x%02x code=0x%02x '
'message=%s',
msg.type, msg.code, utils.hex_array(msg.data))
"""
def __init__(self, datapath, type_=None, code=None, data=None, **kwargs):
super(OFPErrorMsg, self).__init__(datapath)
self.type = type_
self.code = code
if isinstance(data, six.string_types):
data = data.encode('ascii')
self.data = data
if self.type == ofproto.OFPET_EXPERIMENTER:
self.exp_type = kwargs.get('exp_type', None)
self.experimenter = kwargs.get('experimenter', None)
@classmethod
def parser(cls, datapath, version, msg_type, msg_len, xid, buf):
type_, = struct.unpack_from('!H', six.binary_type(buf),
ofproto.OFP_HEADER_SIZE)
msg = super(OFPErrorMsg, cls).parser(datapath, version, msg_type,
msg_len, xid, buf)
if type_ == ofproto.OFPET_EXPERIMENTER:
(msg.type, msg.exp_type, msg.experimenter,
msg.data) = cls.parse_experimenter_body(buf)
else:
(msg.type, msg.code,
msg.data) = cls.parse_body(buf)
return msg
@classmethod
def parse_body(cls, buf):
type_, code = struct.unpack_from(
ofproto.OFP_ERROR_MSG_PACK_STR, buf,
ofproto.OFP_HEADER_SIZE)
data = buf[ofproto.OFP_ERROR_MSG_SIZE:]
return type_, code, data
@classmethod
def parse_experimenter_body(cls, buf):
type_, exp_type, experimenter = struct.unpack_from(
ofproto.OFP_ERROR_EXPERIMENTER_MSG_PACK_STR, buf,
ofproto.OFP_HEADER_SIZE)
data = buf[ofproto.OFP_ERROR_EXPERIMENTER_MSG_SIZE:]
return type_, exp_type, experimenter, data
def _serialize_body(self):
assert self.data is not None
if self.type == ofproto.OFPET_EXPERIMENTER:
msg_pack_into(ofproto.OFP_ERROR_EXPERIMENTER_MSG_PACK_STR,
self.buf, ofproto.OFP_HEADER_SIZE,
self.type, self.exp_type, self.experimenter)
self.buf += self.data
else:
msg_pack_into(ofproto.OFP_ERROR_MSG_PACK_STR,
self.buf, ofproto.OFP_HEADER_SIZE,
self.type, self.code)
self.buf += self.data
# For the backward compatibility
def OFPErrorExperimenterMsg(datapath, type_=None, exp_type=None,
experimenter=None, data=None):
msg = OFPErrorMsg(datapath, data=data)
msg.type = ofproto.OFPET_EXPERIMENTER
msg.exp_type = exp_type
msg.experimenter = experimenter
return msg
@_register_parser
@_set_msg_type(ofproto.OFPT_ECHO_REQUEST)
class OFPEchoRequest(MsgBase):
"""
Echo request message
This message is handled by the OSKen framework, so the OSKen application
do not need to process this typically.
========== =========================================================
Attribute Description
========== =========================================================
data An arbitrary length data
========== =========================================================
Example::
def send_echo_request(self, datapath, data):
ofp_parser = datapath.ofproto_parser
req = ofp_parser.OFPEchoRequest(datapath, data)
datapath.send_msg(req)
@set_ev_cls(ofp_event.EventOFPEchoRequest,
[HANDSHAKE_DISPATCHER, CONFIG_DISPATCHER, MAIN_DISPATCHER])
def echo_request_handler(self, ev):
self.logger.debug('OFPEchoRequest received: data=%s',
utils.hex_array(ev.msg.data))
"""
def __init__(self, datapath, data=None):
super(OFPEchoRequest, self).__init__(datapath)
self.data = data
@classmethod
def parser(cls, datapath, version, msg_type, msg_len, xid, buf):
msg = super(OFPEchoRequest, cls).parser(datapath, version, msg_type,
msg_len, xid, buf)
msg.data = msg.buf[ofproto.OFP_HEADER_SIZE:]
return msg
def _serialize_body(self):
if self.data is not None:
self.buf += self.data
@_register_parser
@_set_msg_type(ofproto.OFPT_ECHO_REPLY)
class OFPEchoReply(MsgBase):
"""
Echo reply message
This message is handled by the OSKen framework, so the OSKen application
do not need to process this typically.
========== =========================================================
Attribute Description
========== =========================================================
data An arbitrary length data
========== =========================================================
Example::
def send_echo_reply(self, datapath, data):
ofp_parser = datapath.ofproto_parser
reply = ofp_parser.OFPEchoReply(datapath, data)
datapath.send_msg(reply)
@set_ev_cls(ofp_event.EventOFPEchoReply,
[HANDSHAKE_DISPATCHER, CONFIG_DISPATCHER, MAIN_DISPATCHER])
def echo_reply_handler(self, ev):
self.logger.debug('OFPEchoReply received: data=%s',
utils.hex_array(ev.msg.data))
"""
def __init__(self, datapath, data=None):
super(OFPEchoReply, self).__init__(datapath)
self.data = data
@classmethod
def parser(cls, datapath, version, msg_type, msg_len, xid, buf):
msg = super(OFPEchoReply, cls).parser(datapath, version, msg_type,
msg_len, xid, buf)
msg.data = msg.buf[ofproto.OFP_HEADER_SIZE:]
return msg
def _serialize_body(self):
assert self.data is not None
self.buf += self.data
@_register_parser
@_set_msg_type(ofproto.OFPT_EXPERIMENTER)
class OFPExperimenter(MsgBase):
"""
Experimenter extension message
============= =========================================================
Attribute Description
============= =========================================================
experimenter Experimenter ID
exp_type Experimenter defined
data Experimenter defined arbitrary additional data
============= =========================================================
"""
def __init__(self, datapath, experimenter=None, exp_type=None, data=None):
super(OFPExperimenter, self).__init__(datapath)
self.experimenter = experimenter
self.exp_type = exp_type
self.data = data
@classmethod
def parser(cls, datapath, version, msg_type, msg_len, xid, buf):
msg = super(OFPExperimenter, cls).parser(datapath, version, msg_type,
msg_len, xid, buf)
(msg.experimenter, msg.exp_type) = struct.unpack_from(
ofproto.OFP_EXPERIMENTER_HEADER_PACK_STR, msg.buf,
ofproto.OFP_HEADER_SIZE)
msg.data = msg.buf[ofproto.OFP_EXPERIMENTER_HEADER_SIZE:]
return msg
def _serialize_body(self):
assert self.data is not None
msg_pack_into(ofproto.OFP_EXPERIMENTER_HEADER_PACK_STR,
self.buf, ofproto.OFP_HEADER_SIZE,
self.experimenter, self.exp_type)
self.buf += self.data
class OFPPort(ofproto_parser.namedtuple('OFPPort', (
'port_no', 'hw_addr', 'name', 'config', 'state', 'curr',
'advertised', 'supported', 'peer', 'curr_speed', 'max_speed'))):
"""
Description of a port
========== =========================================================
Attribute Description
========== =========================================================
port_no Port number and it uniquely identifies a port within
a switch.
hw_addr MAC address for the port.
name Null-terminated string containing a human-readable name
for the interface.
config Bitmap of port configration flags.
| OFPPC_PORT_DOWN
| OFPPC_NO_RECV
| OFPPC_NO_FWD
| OFPPC_NO_PACKET_IN
state Bitmap of port state flags.
| OFPPS_LINK_DOWN
| OFPPS_BLOCKED
| OFPPS_LIVE
curr Current features.
advertised Features being advertised by the port.
supported Features supported by the port.
peer Features advertised by peer.
curr_speed Current port bitrate in kbps.
max_speed Max port bitrate in kbps.
========== =========================================================
"""
_TYPE = {
'ascii': [
'hw_addr',
],
'utf-8': [
# OF spec is unclear about the encoding of name.
# we assumes UTF-8, which is used by OVS.
'name',
]
}
@classmethod
def parser(cls, buf, offset):
port = struct.unpack_from(ofproto.OFP_PORT_PACK_STR, buf, offset)
port = list(port)
i = cls._fields.index('hw_addr')
port[i] = addrconv.mac.bin_to_text(port[i])
i = cls._fields.index('name')
port[i] = port[i].rstrip(b'\0')
return cls(*port)
@_set_msg_type(ofproto.OFPT_FEATURES_REQUEST)
class OFPFeaturesRequest(MsgBase):
"""
Features request message
The controller sends a feature request to the switch upon session
establishment.
This message is handled by the OSKen framework, so the OSKen application
do not need to process this typically.
Example::
def send_features_request(self, datapath):
ofp_parser = datapath.ofproto_parser
req = ofp_parser.OFPFeaturesRequest(datapath)
datapath.send_msg(req)
"""
def __init__(self, datapath):
super(OFPFeaturesRequest, self).__init__(datapath)
@_register_parser
@_set_msg_type(ofproto.OFPT_FEATURES_REPLY)
class OFPSwitchFeatures(MsgBase):
"""
Features reply message
The switch responds with a features reply message to a features
request.
This message is handled by the OSKen framework, so the OSKen application
do not need to process this typically.
Example::
@set_ev_cls(ofp_event.EventOFPSwitchFeatures, CONFIG_DISPATCHER)
def switch_features_handler(self, ev):
msg = ev.msg
self.logger.debug('OFPSwitchFeatures received: '
'datapath_id=0x%016x n_buffers=%d '
'n_tables=%d capabilities=0x%08x ports=%s',
msg.datapath_id, msg.n_buffers, msg.n_tables,
msg.capabilities, msg.ports)
"""
def __init__(self, datapath, datapath_id=None, n_buffers=None,
n_tables=None, capabilities=None, ports=None):
super(OFPSwitchFeatures, self).__init__(datapath)
self.datapath_id = datapath_id
self.n_buffers = n_buffers
self.n_tables = n_tables
self.capabilities = capabilities
self.ports = ports
@classmethod
def parser(cls, datapath, version, msg_type, msg_len, xid, buf):
msg = super(OFPSwitchFeatures, cls).parser(datapath, version, msg_type,
msg_len, xid, buf)
(msg.datapath_id,
msg.n_buffers,
msg.n_tables,
msg.capabilities,
msg._reserved) = struct.unpack_from(
ofproto.OFP_SWITCH_FEATURES_PACK_STR, msg.buf,
ofproto.OFP_HEADER_SIZE)
msg.ports = {}
n_ports = ((msg_len - ofproto.OFP_SWITCH_FEATURES_SIZE) //
ofproto.OFP_PORT_SIZE)
offset = ofproto.OFP_SWITCH_FEATURES_SIZE
for i in range(n_ports):
port = OFPPort.parser(msg.buf, offset)
msg.ports[port.port_no] = port
offset += ofproto.OFP_PORT_SIZE
return msg
@_set_msg_type(ofproto.OFPT_GET_CONFIG_REQUEST)
class OFPGetConfigRequest(MsgBase):
"""
Get config request message
The controller sends a get config request to query configuration
parameters in the switch.
Example::
def send_get_config_request(self, datapath):
ofp_parser = datapath.ofproto_parser
req = ofp_parser.OFPGetConfigRequest(datapath)
datapath.send_msg(req)
"""
def __init__(self, datapath):
super(OFPGetConfigRequest, self).__init__(datapath)
@_register_parser
@_set_msg_type(ofproto.OFPT_GET_CONFIG_REPLY)
class OFPGetConfigReply(MsgBase):
"""
Get config reply message
The switch responds to a configuration request with a get config reply
message.
============= =========================================================
Attribute Description
============= =========================================================
flags One of the following configuration flags.
| OFPC_FRAG_NORMAL
| OFPC_FRAG_DROP
| OFPC_FRAG_REASM
| OFPC_FRAG_MASK
| OFPC_INVALID_TTL_TO_CONTROLLER
miss_send_len Max bytes of new flow that datapath should send to the
controller
============= =========================================================
Example::
@set_ev_cls(ofp_event.EventOFPGetConfigReply, MAIN_DISPATCHER)
def get_config_reply_handler(self, ev):
msg = ev.msg
dp = msg.datapath
ofp = dp.ofproto
if msg.flags == ofp.OFPC_FRAG_NORMAL:
flags = 'NORMAL'
elif msg.flags == ofp.OFPC_FRAG_DROP:
flags = 'DROP'
elif msg.flags == ofp.OFPC_FRAG_REASM:
flags = 'REASM'
elif msg.flags == ofp.OFPC_FRAG_MASK:
flags = 'MASK'
elif msg.flags == ofp.OFPC_INVALID_TTL_TO_CONTROLLER:
flags = 'INVALID TTL TO CONTROLLER'
else:
flags = 'unknown'
self.logger.debug('OFPGetConfigReply received: '
'flags=%s miss_send_len=%d',
flags, msg.miss_send_len)
"""
def __init__(self, datapath, flags=None, miss_send_len=None):
super(OFPGetConfigReply, self).__init__(datapath)
self.flags = flags
self.miss_send_len = miss_send_len
@classmethod
def parser(cls, datapath, version, msg_type, msg_len, xid, buf):
msg = super(OFPGetConfigReply, cls).parser(datapath, version, msg_type,
msg_len, xid, buf)
msg.flags, msg.miss_send_len = struct.unpack_from(
ofproto.OFP_SWITCH_CONFIG_PACK_STR, msg.buf,
ofproto.OFP_HEADER_SIZE)
return msg
@_set_msg_type(ofproto.OFPT_SET_CONFIG)
class OFPSetConfig(MsgBase):
"""
Set config request message
The controller sends a set config request message to set configuraion
parameters.
============= =========================================================
Attribute Description
============= =========================================================
flags One of the following configuration flags.
| OFPC_FRAG_NORMAL
| OFPC_FRAG_DROP
| OFPC_FRAG_REASM
| OFPC_FRAG_MASK
| OFPC_INVALID_TTL_TO_CONTROLLER
miss_send_len Max bytes of new flow that datapath should send to the
controller
============= =========================================================
Example::
def send_set_config(self, datapath):
ofp = datapath.ofproto
ofp_parser = datapath.ofproto_parser
req = ofp_parser.OFPSetConfig(datapath, ofp.OFPC_FRAG_NORMAL, 256)
datapath.send_msg(req)
"""
def __init__(self, datapath, flags=0, miss_send_len=0):
super(OFPSetConfig, self).__init__(datapath)
self.flags = flags
self.miss_send_len = miss_send_len
def _serialize_body(self):
assert self.flags is not None
assert self.miss_send_len is not None
msg_pack_into(ofproto.OFP_SWITCH_CONFIG_PACK_STR,
self.buf, ofproto.OFP_HEADER_SIZE,
self.flags, self.miss_send_len)
@_register_parser
@_set_msg_type(ofproto.OFPT_PACKET_IN)
class OFPPacketIn(MsgBase):
"""
Packet-In message
The switch sends the packet that received to the controller by this
message.
============= =========================================================
Attribute Description
============= =========================================================
buffer_id ID assigned by datapath
total_len Full length of frame
reason Reason packet is being sent.
| OFPR_NO_MATCH
| OFPR_ACTION
| OFPR_INVALID_TTL
table_id ID of the table that was looked up
match Instance of ``OFPMatch``
data Ethernet frame
============= =========================================================
Example::
@set_ev_cls(ofp_event.EventOFPPacketIn, MAIN_DISPATCHER)
def packet_in_handler(self, ev):
msg = ev.msg
dp = msg.datapath
ofp = dp.ofproto
if msg.reason == ofp.OFPR_NO_MATCH:
reason = 'NO MATCH'
elif msg.reason == ofp.OFPR_ACTION:
reason = 'ACTION'
elif msg.reason == ofp.OFPR_INVALID_TTL:
reason = 'INVALID TTL'
else:
reason = 'unknown'
self.logger.debug('OFPPacketIn received: '
'buffer_id=%x total_len=%d reason=%s '
'table_id=%d match=%s data=%s',
msg.buffer_id, msg.total_len, reason,
msg.table_id, msg.match,
utils.hex_array(msg.data))
"""
def __init__(self, datapath, buffer_id=None, total_len=None, reason=None,
table_id=None, match=None, data=None):
super(OFPPacketIn, self).__init__(datapath)
self.buffer_id = buffer_id
self.total_len = total_len
self.reason = reason
self.table_id = table_id
self.match = match
self.data = data
@classmethod
def parser(cls, datapath, version, msg_type, msg_len, xid, buf):
msg = super(OFPPacketIn, cls).parser(datapath, version, msg_type,
msg_len, xid, buf)
(msg.buffer_id, msg.total_len, msg.reason,
msg.table_id) = struct.unpack_from(
ofproto.OFP_PACKET_IN_PACK_STR,
msg.buf, ofproto.OFP_HEADER_SIZE)
msg.match = OFPMatch.parser(msg.buf, ofproto.OFP_PACKET_IN_SIZE -
ofproto.OFP_MATCH_SIZE)
match_len = utils.round_up(msg.match.length, 8)
msg.data = msg.buf[(ofproto.OFP_PACKET_IN_SIZE -
ofproto.OFP_MATCH_SIZE + match_len + 2):]
if msg.total_len < len(msg.data):
# discard padding for 8-byte alignment of OFP packet
msg.data = msg.data[:msg.total_len]
return msg
@_register_parser
@_set_msg_type(ofproto.OFPT_FLOW_REMOVED)
class OFPFlowRemoved(MsgBase):
"""
Flow removed message
When flow entries time out or are deleted, the switch notifies controller
with this message.
================ ======================================================
Attribute Description
================ ======================================================
cookie Opaque controller-issued identifier
priority Priority level of flow entry
reason One of the following values.
| OFPRR_IDLE_TIMEOUT
| OFPRR_HARD_TIMEOUT
| OFPRR_DELETE
| OFPRR_GROUP_DELETE
table_id ID of the table
duration_sec Time flow was alive in seconds
duration_nsec Time flow was alive in nanoseconds beyond duration_sec
idle_timeout Idle timeout from original flow mod
hard_timeout Hard timeout from original flow mod
packet_count Number of packets that was associated with the flow
byte_count Number of bytes that was associated with the flow
match Instance of ``OFPMatch``
================ ======================================================
Example::
@set_ev_cls(ofp_event.EventOFPFlowRemoved, MAIN_DISPATCHER)
def flow_removed_handler(self, ev):
msg = ev.msg
dp = msg.datapath
ofp = dp.ofproto
if msg.reason == ofp.OFPRR_IDLE_TIMEOUT:
reason = 'IDLE TIMEOUT'
elif msg.reason == ofp.OFPRR_HARD_TIMEOUT:
reason = 'HARD TIMEOUT'
elif msg.reason == ofp.OFPRR_DELETE:
reason = 'DELETE'
elif msg.reason == ofp.OFPRR_GROUP_DELETE:
reason = 'GROUP DELETE'
else:
reason = 'unknown'
self.logger.debug('OFPFlowRemoved received: '
'cookie=%d priority=%d reason=%s table_id=%d '
'duration_sec=%d duration_nsec=%d '
'idle_timeout=%d hard_timeout=%d '
'packet_count=%d byte_count=%d match.fields=%s',
msg.cookie, msg.priority, reason, msg.table_id,
msg.duration_sec, msg.duration_nsec,
msg.idle_timeout, msg.hard_timeout,
msg.packet_count, msg.byte_count, msg.match)
"""
def __init__(self, datapath, cookie=None, priority=None, reason=None,
table_id=None, duration_sec=None, duration_nsec=None,
idle_timeout=None, hard_timeout=None, packet_count=None,
byte_count=None, match=None):
super(OFPFlowRemoved, self).__init__(datapath)
self.cookie = cookie
self.priority = priority
self.reason = reason
self.table_id = table_id
self.duration_sec = duration_sec
self.duration_nsec = duration_nsec
self.idle_timeout = idle_timeout
self.hard_timeout = hard_timeout
self.packet_count = packet_count
self.byte_count = byte_count
self.match = match
@classmethod
def parser(cls, datapath, version, msg_type, msg_len, xid, buf):
msg = super(OFPFlowRemoved, cls).parser(datapath, version, msg_type,
msg_len, xid, buf)
(msg.cookie, msg.priority, msg.reason,
msg.table_id, msg.duration_sec, msg.duration_nsec,
msg.idle_timeout, msg.hard_timeout, msg.packet_count,
msg.byte_count) = struct.unpack_from(
ofproto.OFP_FLOW_REMOVED_PACK_STR0,
msg.buf,
ofproto.OFP_HEADER_SIZE)
offset = (ofproto.OFP_FLOW_REMOVED_SIZE -
ofproto.OFP_MATCH_SIZE)
msg.match = OFPMatch.parser(msg.buf, offset)
return msg
@_register_parser
@_set_msg_type(ofproto.OFPT_PORT_STATUS)
class OFPPortStatus(MsgBase):
"""
Port status message
The switch notifies controller of change of ports.
================ ======================================================
Attribute Description
================ ======================================================
reason One of the following values.
| OFPPR_ADD
| OFPPR_DELETE
| OFPPR_MODIFY
desc instance of ``OFPPort``
================ ======================================================
Example::
@set_ev_cls(ofp_event.EventOFPPortStatus, MAIN_DISPATCHER)
def port_status_handler(self, ev):
msg = ev.msg
dp = msg.datapath
ofp = dp.ofproto
if msg.reason == ofp.OFPPR_ADD:
reason = 'ADD'
elif msg.reason == ofp.OFPPR_DELETE:
reason = 'DELETE'
elif msg.reason == ofp.OFPPR_MODIFY:
reason = 'MODIFY'
else:
reason = 'unknown'
self.logger.debug('OFPPortStatus received: reason=%s desc=%s',
reason, msg.desc)
"""
def __init__(self, datapath, reason=None, desc=None):
super(OFPPortStatus, self).__init__(datapath)
self.reason = reason
self.desc = desc
@classmethod
def parser(cls, datapath, version, msg_type, msg_len, xid, buf):
msg = super(OFPPortStatus, cls).parser(datapath, version, msg_type,
msg_len, xid, buf)
msg.reason = struct.unpack_from(
ofproto.OFP_PORT_STATUS_PACK_STR, msg.buf,
ofproto.OFP_HEADER_SIZE)[0]
msg.desc = OFPPort.parser(msg.buf,
ofproto.OFP_PORT_STATUS_DESC_OFFSET)
return msg
@_set_msg_type(ofproto.OFPT_PACKET_OUT)
class OFPPacketOut(MsgBase):
"""
Packet-Out message
The controller uses this message to send a packet out throught the
switch.
================ ======================================================
Attribute Description
================ ======================================================
buffer_id ID assigned by datapath (OFP_NO_BUFFER if none)
in_port Packet's input port or ``OFPP_CONTROLLER``
actions list of OpenFlow action class
data Packet data of a binary type value or
an instances of packet.Packet.
================ ======================================================
Example::
def send_packet_out(self, datapath, buffer_id, in_port):
ofp = datapath.ofproto
ofp_parser = datapath.ofproto_parser
actions = [ofp_parser.OFPActionOutput(ofp.OFPP_FLOOD, 0)]
req = ofp_parser.OFPPacketOut(datapath, buffer_id,
in_port, actions)
datapath.send_msg(req)
"""
def __init__(self, datapath, buffer_id=None, in_port=None, actions=None,
data=None, actions_len=None):
# The in_port field is the ingress port that must be associated
# with the packet for OpenFlow processing.
assert in_port is not None
super(OFPPacketOut, self).__init__(datapath)
self.buffer_id = buffer_id
self.in_port = in_port
self.actions_len = 0
self.actions = actions
self.data = data
def _serialize_body(self):
self.actions_len = 0
offset = ofproto.OFP_PACKET_OUT_SIZE
for a in self.actions:
a.serialize(self.buf, offset)
offset += a.len
self.actions_len += a.len
if self.data is not None:
assert self.buffer_id == 0xffffffff
if isinstance(self.data, packet.Packet):
self.data.serialize()
self.buf += self.data.data
else:
self.buf += self.data
msg_pack_into(ofproto.OFP_PACKET_OUT_PACK_STR,
self.buf, ofproto.OFP_HEADER_SIZE,
self.buffer_id, self.in_port, self.actions_len)
@classmethod
def from_jsondict(cls, dict_, decode_string=base64.b64decode,
**additional_args):
if isinstance(dict_['data'], dict):
data = dict_.pop('data')
ins = super(OFPPacketOut, cls).from_jsondict(dict_,
decode_string,
**additional_args)
ins.data = packet.Packet.from_jsondict(data['Packet'])
dict_['data'] = data
else:
ins = super(OFPPacketOut, cls).from_jsondict(dict_,
decode_string,
**additional_args)
return ins
@_register_parser
@_set_msg_type(ofproto.OFPT_FLOW_MOD)
class OFPFlowMod(MsgBase):
"""
Modify Flow entry message
The controller sends this message to modify the flow table.
================ ======================================================
Attribute Description
================ ======================================================
cookie Opaque controller-issued identifier
cookie_mask Mask used to restrict the cookie bits that must match
when the command is ``OPFFC_MODIFY*`` or
``OFPFC_DELETE*``
table_id ID of the table to put the flow in
command One of the following values.
| OFPFC_ADD
| OFPFC_MODIFY
| OFPFC_MODIFY_STRICT
| OFPFC_DELETE
| OFPFC_DELETE_STRICT
idle_timeout Idle time before discarding (seconds)
hard_timeout Max time before discarding (seconds)
priority Priority level of flow entry
buffer_id Buffered packet to apply to (or OFP_NO_BUFFER)
out_port For ``OFPFC_DELETE*`` commands, require matching
entries to include this as an output port
out_group For ``OFPFC_DELETE*`` commands, require matching
entries to include this as an output group
flags One of the following values.
| OFPFF_SEND_FLOW_REM
| OFPFF_CHECK_OVERLAP
| OFPFF_RESET_COUNTS
match Instance of ``OFPMatch``
instructions list of ``OFPInstruction*`` instance
================ ======================================================
Example::
def send_flow_mod(self, datapath):
ofp = datapath.ofproto
ofp_parser = datapath.ofproto_parser
cookie = cookie_mask = 0
table_id = 0
idle_timeout = hard_timeout = 0
priority = 32768
buffer_id = ofp.OFP_NO_BUFFER
match = ofp_parser.OFPMatch(in_port=1, eth_dst='ff:ff:ff:ff:ff:ff')
actions = [ofp_parser.OFPActionOutput(ofp.OFPP_NORMAL, 0)]
inst = [ofp_parser.OFPInstructionActions(ofp.OFPIT_APPLY_ACTIONS,
actions)]
req = ofp_parser.OFPFlowMod(datapath, cookie, cookie_mask,
table_id, ofp.OFPFC_ADD,
idle_timeout, hard_timeout,
priority, buffer_id,
ofp.OFPP_ANY, ofp.OFPG_ANY,
ofp.OFPFF_SEND_FLOW_REM,
match, inst)
datapath.send_msg(req)
"""
def __init__(self, datapath, cookie=0, cookie_mask=0, table_id=0,
command=ofproto.OFPFC_ADD,
idle_timeout=0, hard_timeout=0, priority=0,
buffer_id=ofproto.OFP_NO_BUFFER,
out_port=0, out_group=0, flags=0,
match=None,
instructions=None):
instructions = instructions if instructions else []
super(OFPFlowMod, self).__init__(datapath)
self.cookie = cookie
self.cookie_mask = cookie_mask
self.table_id = table_id
self.command = command
self.idle_timeout = idle_timeout
self.hard_timeout = hard_timeout
self.priority = priority
self.buffer_id = buffer_id
self.out_port = out_port
self.out_group = out_group
self.flags = flags
if match is None:
match = OFPMatch()
assert isinstance(match, OFPMatch)
self.match = match
for i in instructions:
assert isinstance(i, OFPInstruction)
self.instructions = instructions
def _serialize_body(self):
msg_pack_into(ofproto.OFP_FLOW_MOD_PACK_STR0, self.buf,
ofproto.OFP_HEADER_SIZE,
self.cookie, self.cookie_mask, self.table_id,
self.command, self.idle_timeout, self.hard_timeout,
self.priority, self.buffer_id, self.out_port,
self.out_group, self.flags)
offset = (ofproto.OFP_FLOW_MOD_SIZE -
ofproto.OFP_MATCH_SIZE)
match_len = self.match.serialize(self.buf, offset)
offset += match_len
for inst in self.instructions:
inst.serialize(self.buf, offset)
offset += inst.len
@classmethod
def parser(cls, datapath, version, msg_type, msg_len, xid, buf):
msg = super(OFPFlowMod, cls).parser(
datapath, version, msg_type, msg_len, xid, buf)
(msg.cookie, msg.cookie_mask, msg.table_id,
msg.command, msg.idle_timeout, msg.hard_timeout,
msg.priority, msg.buffer_id, msg.out_port,
msg.out_group, msg.flags) = struct.unpack_from(
ofproto.OFP_FLOW_MOD_PACK_STR0, msg.buf,
ofproto.OFP_HEADER_SIZE)
offset = ofproto.OFP_FLOW_MOD_SIZE - ofproto.OFP_HEADER_SIZE
msg.match = OFPMatch.parser(buf, offset)
offset += utils.round_up(msg.match.length, 8)
instructions = []
while offset < msg_len:
i = OFPInstruction.parser(buf, offset)
instructions.append(i)
offset += i.len
msg.instructions = instructions
return msg
class OFPInstruction(StringifyMixin):
_INSTRUCTION_TYPES = {}
@staticmethod
def register_instruction_type(types):
def _register_instruction_type(cls):
for type_ in types:
OFPInstruction._INSTRUCTION_TYPES[type_] = cls
return cls
return _register_instruction_type
@classmethod
def parser(cls, buf, offset):
(type_, len_) = struct.unpack_from('!HH', buf, offset)
cls_ = cls._INSTRUCTION_TYPES.get(type_)
return cls_.parser(buf, offset)
@OFPInstruction.register_instruction_type([ofproto.OFPIT_GOTO_TABLE])
class OFPInstructionGotoTable(OFPInstruction):
"""
Goto table instruction
This instruction indicates the next table in the processing pipeline.
================ ======================================================
Attribute Description
================ ======================================================
table_id Next table
================ ======================================================
"""
def __init__(self, table_id, type_=None, len_=None):
super(OFPInstructionGotoTable, self).__init__()
self.type = ofproto.OFPIT_GOTO_TABLE
self.len = ofproto.OFP_INSTRUCTION_GOTO_TABLE_SIZE
self.table_id = table_id
@classmethod
def parser(cls, buf, offset):
(type_, len_, table_id) = struct.unpack_from(
ofproto.OFP_INSTRUCTION_GOTO_TABLE_PACK_STR,
buf, offset)
return cls(table_id)
def serialize(self, buf, offset):
msg_pack_into(ofproto.OFP_INSTRUCTION_GOTO_TABLE_PACK_STR,
buf, offset, self.type, self.len, self.table_id)
@OFPInstruction.register_instruction_type([ofproto.OFPIT_WRITE_METADATA])
class OFPInstructionWriteMetadata(OFPInstruction):
"""
Write metadata instruction
This instruction writes the masked metadata value into the metadata field.
================ ======================================================
Attribute Description
================ ======================================================
metadata Metadata value to write
metadata_mask Metadata write bitmask
================ ======================================================
"""
def __init__(self, metadata, metadata_mask, type_=None, len_=None):
super(OFPInstructionWriteMetadata, self).__init__()
self.type = ofproto.OFPIT_WRITE_METADATA
self.len = ofproto.OFP_INSTRUCTION_WRITE_METADATA_SIZE
self.metadata = metadata
self.metadata_mask = metadata_mask
@classmethod
def parser(cls, buf, offset):
(type_, len_, metadata, metadata_mask) = struct.unpack_from(
ofproto.OFP_INSTRUCTION_WRITE_METADATA_PACK_STR,
buf, offset)
return cls(metadata, metadata_mask)
def serialize(self, buf, offset):
msg_pack_into(ofproto.OFP_INSTRUCTION_WRITE_METADATA_PACK_STR,
buf, offset, self.type, self.len, self.metadata,
self.metadata_mask)
@OFPInstruction.register_instruction_type([ofproto.OFPIT_WRITE_ACTIONS,
ofproto.OFPIT_APPLY_ACTIONS,
ofproto.OFPIT_CLEAR_ACTIONS])
class OFPInstructionActions(OFPInstruction):
"""
Actions instruction
This instruction writes/applies/clears the actions.
================ ======================================================
Attribute Description
================ ======================================================
type One of following values.
| OFPIT_WRITE_ACTIONS
| OFPIT_APPLY_ACTIONS
| OFPIT_CLEAR_ACTIONS
actions list of OpenFlow action class
================ ======================================================
``type`` attribute corresponds to ``type_`` parameter of __init__.
"""
def __init__(self, type_, actions=None, len_=None):
super(OFPInstructionActions, self).__init__()
self.type = type_
for a in actions:
assert isinstance(a, OFPAction)
self.actions = actions
@classmethod
def parser(cls, buf, offset):
(type_, len_) = struct.unpack_from(
ofproto.OFP_INSTRUCTION_ACTIONS_PACK_STR,
buf, offset)
offset += ofproto.OFP_INSTRUCTION_ACTIONS_SIZE
actions = []
actions_len = len_ - ofproto.OFP_INSTRUCTION_ACTIONS_SIZE
while actions_len > 0:
a = OFPAction.parser(buf, offset)
actions.append(a)
actions_len -= a.len
offset += a.len
inst = cls(type_, actions)
inst.len = len_
return inst
def serialize(self, buf, offset):
action_offset = offset + ofproto.OFP_INSTRUCTION_ACTIONS_SIZE
if self.actions:
for a in self.actions:
assert isinstance(a, OFPAction)
a.serialize(buf, action_offset)
action_offset += a.len
self.len = action_offset - offset
pad_len = utils.round_up(self.len, 8) - self.len
msg_pack_into("%dx" % pad_len, buf, action_offset)
self.len += pad_len
msg_pack_into(ofproto.OFP_INSTRUCTION_ACTIONS_PACK_STR,
buf, offset, self.type, self.len)
class OFPActionHeader(StringifyMixin):
def __init__(self, type_, len_):
self.type = type_
self.len = len_
def serialize(self, buf, offset):
msg_pack_into(ofproto.OFP_ACTION_HEADER_PACK_STR,
buf, offset, self.type, self.len)
class OFPAction(OFPActionHeader):
_ACTION_TYPES = {}
@staticmethod
def register_action_type(type_, len_):
def _register_action_type(cls):
cls.cls_action_type = type_
cls.cls_action_len = len_
OFPAction._ACTION_TYPES[cls.cls_action_type] = cls
return cls
return _register_action_type
def __init__(self):
cls = self.__class__
super(OFPAction, self).__init__(cls.cls_action_type,
cls.cls_action_len)
@classmethod
def parser(cls, buf, offset):
type_, len_ = struct.unpack_from(
ofproto.OFP_ACTION_HEADER_PACK_STR, buf, offset)
cls_ = cls._ACTION_TYPES.get(type_)
assert cls_ is not None
return cls_.parser(buf, offset)
def serialize(self, buf, offset):
msg_pack_into(ofproto.OFP_ACTION_HEADER_PACK_STR, buf,
offset, self.type, self.len)
@OFPAction.register_action_type(ofproto.OFPAT_OUTPUT,
ofproto.OFP_ACTION_OUTPUT_SIZE)
class OFPActionOutput(OFPAction):
"""
Output action
This action indicates output a packet to the switch port.
================ ======================================================
Attribute Description
================ ======================================================
port Output port
max_len Max length to send to controller
================ ======================================================
"""
def __init__(self, port, max_len=ofproto.OFPCML_MAX,
type_=None, len_=None):
super(OFPActionOutput, self).__init__()
self.port = port
self.max_len = max_len
@classmethod
def parser(cls, buf, offset):
type_, len_, port, max_len = struct.unpack_from(
ofproto.OFP_ACTION_OUTPUT_PACK_STR, buf, offset)
return cls(port, max_len)
def serialize(self, buf, offset):
msg_pack_into(ofproto.OFP_ACTION_OUTPUT_PACK_STR, buf,
offset, self.type, self.len, self.port, self.max_len)
@OFPAction.register_action_type(ofproto.OFPAT_GROUP,
ofproto.OFP_ACTION_GROUP_SIZE)
class OFPActionGroup(OFPAction):
"""
Group action
This action indicates the group used to process the packet.
================ ======================================================
Attribute Description
================ ======================================================
group_id Group identifier
================ ======================================================
"""
def __init__(self, group_id=0, type_=None, len_=None):
super(OFPActionGroup, self).__init__()
self.group_id = group_id
@classmethod
def parser(cls, buf, offset):
(type_, len_, group_id) = struct.unpack_from(
ofproto.OFP_ACTION_GROUP_PACK_STR, buf, offset)
return cls(group_id)
def serialize(self, buf, offset):
msg_pack_into(ofproto.OFP_ACTION_GROUP_PACK_STR, buf,
offset, self.type, self.len, self.group_id)
@OFPAction.register_action_type(ofproto.OFPAT_SET_QUEUE,
ofproto.OFP_ACTION_SET_QUEUE_SIZE)
class OFPActionSetQueue(OFPAction):
"""
Set queue action
This action sets the queue id that will be used to map a flow to an
already-configured queue on a port.
================ ======================================================
Attribute Description
================ ======================================================
queue_id Queue ID for the packets
================ ======================================================
"""
def __init__(self, queue_id, type_=None, len_=None):
super(OFPActionSetQueue, self).__init__()
self.queue_id = queue_id
@classmethod
def parser(cls, buf, offset):
(type_, len_, queue_id) = struct.unpack_from(
ofproto.OFP_ACTION_SET_QUEUE_PACK_STR, buf, offset)
return cls(queue_id)
def serialize(self, buf, offset):
msg_pack_into(ofproto.OFP_ACTION_SET_QUEUE_PACK_STR, buf,
offset, self.type, self.len, self.queue_id)
@OFPAction.register_action_type(ofproto.OFPAT_SET_MPLS_TTL,
ofproto.OFP_ACTION_MPLS_TTL_SIZE)
class OFPActionSetMplsTtl(OFPAction):
"""
Set MPLS TTL action
This action sets the MPLS TTL.
================ ======================================================
Attribute Description
================ ======================================================
mpls_ttl MPLS TTL
================ ======================================================
"""
def __init__(self, mpls_ttl, type_=None, len_=None):
super(OFPActionSetMplsTtl, self).__init__()
self.mpls_ttl = mpls_ttl
@classmethod
def parser(cls, buf, offset):
(type_, len_, mpls_ttl) = struct.unpack_from(
ofproto.OFP_ACTION_MPLS_TTL_PACK_STR, buf, offset)
return cls(mpls_ttl)
def serialize(self, buf, offset):
msg_pack_into(ofproto.OFP_ACTION_MPLS_TTL_PACK_STR, buf,
offset, self.type, self.len, self.mpls_ttl)
@OFPAction.register_action_type(ofproto.OFPAT_DEC_MPLS_TTL,
ofproto.OFP_ACTION_HEADER_SIZE)
class OFPActionDecMplsTtl(OFPAction):
"""
Decrement MPLS TTL action
This action decrements the MPLS TTL.
"""
def __init__(self, type_=None, len_=None):
super(OFPActionDecMplsTtl, self).__init__()
@classmethod
def parser(cls, buf, offset):
(type_, len_) = struct.unpack_from(
ofproto.OFP_ACTION_HEADER_PACK_STR, buf, offset)
return cls()
@OFPAction.register_action_type(ofproto.OFPAT_SET_NW_TTL,
ofproto.OFP_ACTION_NW_TTL_SIZE)
class OFPActionSetNwTtl(OFPAction):
"""
Set IP TTL action
This action sets the IP TTL.
================ ======================================================
Attribute Description
================ ======================================================
nw_ttl IP TTL
================ ======================================================
"""
def __init__(self, nw_ttl, type_=None, len_=None):
super(OFPActionSetNwTtl, self).__init__()
self.nw_ttl = nw_ttl
@classmethod
def parser(cls, buf, offset):
(type_, len_, nw_ttl) = struct.unpack_from(
ofproto.OFP_ACTION_NW_TTL_PACK_STR, buf, offset)
return cls(nw_ttl)
def serialize(self, buf, offset):
msg_pack_into(ofproto.OFP_ACTION_NW_TTL_PACK_STR, buf, offset,
self.type, self.len, self.nw_ttl)
@OFPAction.register_action_type(ofproto.OFPAT_DEC_NW_TTL,
ofproto.OFP_ACTION_HEADER_SIZE)
class OFPActionDecNwTtl(OFPAction):
"""
Decrement IP TTL action
This action decrements the IP TTL.
"""
def __init__(self, type_=None, len_=None):
super(OFPActionDecNwTtl, self).__init__()
@classmethod
def parser(cls, buf, offset):
(type_, len_) = struct.unpack_from(
ofproto.OFP_ACTION_HEADER_PACK_STR, buf, offset)
return cls()
@OFPAction.register_action_type(ofproto.OFPAT_COPY_TTL_OUT,
ofproto.OFP_ACTION_HEADER_SIZE)
class OFPActionCopyTtlOut(OFPAction):
"""
Copy TTL Out action
This action copies the TTL from the next-to-outermost header with TTL to
the outermost header with TTL.
"""
def __init__(self, type_=None, len_=None):
super(OFPActionCopyTtlOut, self).__init__()
@classmethod
def parser(cls, buf, offset):
(type_, len_) = struct.unpack_from(
ofproto.OFP_ACTION_HEADER_PACK_STR, buf, offset)
return cls()
@OFPAction.register_action_type(ofproto.OFPAT_COPY_TTL_IN,
ofproto.OFP_ACTION_HEADER_SIZE)
class OFPActionCopyTtlIn(OFPAction):
"""
Copy TTL In action
This action copies the TTL from the outermost header with TTL to the
next-to-outermost header with TTL.
"""
def __init__(self, type_=None, len_=None):
super(OFPActionCopyTtlIn, self).__init__()
@classmethod
def parser(cls, buf, offset):
(type_, len_) = struct.unpack_from(
ofproto.OFP_ACTION_HEADER_PACK_STR, buf, offset)
return cls()
@OFPAction.register_action_type(ofproto.OFPAT_PUSH_VLAN,
ofproto.OFP_ACTION_PUSH_SIZE)
class OFPActionPushVlan(OFPAction):
"""
Push VLAN action
This action pushes a new VLAN tag to the packet.
================ ======================================================
Attribute Description
================ ======================================================
ethertype Ether type. The default is 802.1Q. (0x8100)
================ ======================================================
"""
def __init__(self, ethertype=ether.ETH_TYPE_8021Q, type_=None, len_=None):
super(OFPActionPushVlan, self).__init__()
self.ethertype = ethertype
@classmethod
def parser(cls, buf, offset):
(type_, len_, ethertype) = struct.unpack_from(
ofproto.OFP_ACTION_PUSH_PACK_STR, buf, offset)
return cls(ethertype)
def serialize(self, buf, offset):
msg_pack_into(ofproto.OFP_ACTION_PUSH_PACK_STR, buf, offset,
self.type, self.len, self.ethertype)
@OFPAction.register_action_type(ofproto.OFPAT_PUSH_MPLS,
ofproto.OFP_ACTION_PUSH_SIZE)
class OFPActionPushMpls(OFPAction):
"""
Push MPLS action
This action pushes a new MPLS header to the packet.
================ ======================================================
Attribute Description
================ ======================================================
ethertype Ether type
================ ======================================================
"""
def __init__(self, ethertype=ether.ETH_TYPE_MPLS, type_=None, len_=None):
super(OFPActionPushMpls, self).__init__()
self.ethertype = ethertype
@classmethod
def parser(cls, buf, offset):
(type_, len_, ethertype) = struct.unpack_from(
ofproto.OFP_ACTION_PUSH_PACK_STR, buf, offset)
return cls(ethertype)
def serialize(self, buf, offset):
msg_pack_into(ofproto.OFP_ACTION_PUSH_PACK_STR, buf, offset,
self.type, self.len, self.ethertype)
@OFPAction.register_action_type(ofproto.OFPAT_POP_VLAN,
ofproto.OFP_ACTION_HEADER_SIZE)
class OFPActionPopVlan(OFPAction):
"""
Pop VLAN action
This action pops the outermost VLAN tag from the packet.
"""
def __init__(self, type_=None, len_=None):
super(OFPActionPopVlan, self).__init__()
@classmethod
def parser(cls, buf, offset):
(type_, len_) = struct.unpack_from(
ofproto.OFP_ACTION_HEADER_PACK_STR, buf, offset)
return cls()
@OFPAction.register_action_type(ofproto.OFPAT_POP_MPLS,
ofproto.OFP_ACTION_POP_MPLS_SIZE)
class OFPActionPopMpls(OFPAction):
"""
Pop MPLS action
This action pops the MPLS header from the packet.
"""
def __init__(self, ethertype=ether.ETH_TYPE_IP, type_=None, len_=None):
super(OFPActionPopMpls, self).__init__()
self.ethertype = ethertype
@classmethod
def parser(cls, buf, offset):
(type_, len_, ethertype) = struct.unpack_from(
ofproto.OFP_ACTION_POP_MPLS_PACK_STR, buf, offset)
return cls(ethertype)
def serialize(self, buf, offset):
msg_pack_into(ofproto.OFP_ACTION_POP_MPLS_PACK_STR, buf, offset,
self.type, self.len, self.ethertype)
@OFPAction.register_action_type(ofproto.OFPAT_SET_FIELD,
ofproto.OFP_ACTION_SET_FIELD_SIZE)
class OFPActionSetField(OFPAction):
"""
Set field action
This action modifies a header field in the packet.
The set of keywords available for this is same as OFPMatch.
Example::
set_field = OFPActionSetField(eth_src="00:00:00:00:00:00")
"""
def __init__(self, field=None, **kwargs):
# old api
# OFPActionSetField(field)
# new api
# OFPActionSetField(eth_src="00:00:00:00:00")
super(OFPActionSetField, self).__init__()
if isinstance(field, OFPMatchField):
# old api compat
assert len(kwargs) == 0
self.field = field
else:
# new api
assert len(kwargs) == 1
key = list(kwargs.keys())[0]
value = kwargs[key]
assert isinstance(key, (str, six.text_type))
assert not isinstance(value, tuple) # no mask
self.key = key
self.value = value
@classmethod
def parser(cls, buf, offset):
(type_, len_) = struct.unpack_from('!HH', buf, offset)
(n, value, mask, _len) = ofproto.oxm_parse(buf, offset + 4)
k, uv = ofproto.oxm_to_user(n, value, mask)
action = cls(**{k: uv})
action.len = len_
# old api compat
action.field = OFPMatchField.parser(buf, offset + 4)
return action
def serialize(self, buf, offset):
# old api compat
if self._composed_with_old_api():
return self.serialize_old(buf, offset)
n, value, mask = ofproto.oxm_from_user(self.key, self.value)
len_ = ofproto.oxm_serialize(n, value, mask, buf, offset + 4)
self.len = utils.round_up(4 + len_, 8)
msg_pack_into('!HH', buf, offset, self.type, self.len)
pad_len = self.len - (4 + len_)
msg_pack_into("%dx" % pad_len, buf, offset + 4 + len_)
# XXX old api compat
def serialize_old(self, buf, offset):
len_ = ofproto.OFP_ACTION_SET_FIELD_SIZE + self.field.oxm_len()
self.len = utils.round_up(len_, 8)
pad_len = self.len - len_
msg_pack_into('!HH', buf, offset, self.type, self.len)
self.field.serialize(buf, offset + 4)
offset += len_
msg_pack_into("%dx" % pad_len, buf, offset)
# XXX old api compat
def _composed_with_old_api(self):
return not hasattr(self, 'value')
def to_jsondict(self):
return {
self.__class__.__name__: {
'field': ofproto.oxm_to_jsondict(self.key, self.value),
"len": self.len,
"type": self.type
}
}
@classmethod
def from_jsondict(cls, dict_):
k, v = ofproto.oxm_from_jsondict(dict_['field'])
o = OFPActionSetField(**{k: v})
# XXX old api compat
# serialize and parse to fill old attributes
buf = bytearray()
o.serialize(buf, 0)
return OFPActionSetField.parser(six.binary_type(buf), 0)
# XXX old api compat
def __str__(self):
# XXX old api compat
if self._composed_with_old_api():
# copy object first because serialize_old is destructive
o2 = OFPActionSetField(self.field)
# serialize and parse to fill new fields
buf = bytearray()
o2.serialize(buf, 0)
o = OFPActionSetField.parser(six.binary_type(buf), 0)
else:
o = self
return super(OFPActionSetField, o).__str__()
__repr__ = __str__
def stringify_attrs(self):
yield (self.key, self.value)
@OFPAction.register_action_type(
ofproto.OFPAT_EXPERIMENTER,
ofproto.OFP_ACTION_EXPERIMENTER_HEADER_SIZE)
class OFPActionExperimenter(OFPAction):
"""
Experimenter action
This action is an extensible action for the experimenter.
================ ======================================================
Attribute Description
================ ======================================================
experimenter Experimenter ID
================ ======================================================
.. Note::
For the list of the supported Nicira experimenter actions,
please refer to :ref:`os_ken.ofproto.nx_actions <nx_actions_structures>`.
"""
def __init__(self, experimenter, type_=None, len_=None):
super(OFPActionExperimenter, self).__init__()
self.experimenter = experimenter
@classmethod
def parser(cls, buf, offset):
(type_, len_, experimenter) = struct.unpack_from(
ofproto.OFP_ACTION_EXPERIMENTER_HEADER_PACK_STR, buf, offset)
ex = cls(experimenter)
ex.len = len_
return ex
def serialize(self, buf, offset):
msg_pack_into(ofproto.OFP_ACTION_EXPERIMENTER_HEADER_PACK_STR,
buf, offset, self.type, self.len, self.experimenter)
class OFPBucket(StringifyMixin):
def __init__(self, weight=0, watch_port=ofproto.OFPP_ANY,
watch_group=ofproto.OFPG_ANY, actions=None, len_=None):
super(OFPBucket, self).__init__()
self.weight = weight
self.watch_port = watch_port
self.watch_group = watch_group
self.actions = actions
@classmethod
def parser(cls, buf, offset):
(len_, weigth, watch_port, watch_group) = struct.unpack_from(
ofproto.OFP_BUCKET_PACK_STR, buf, offset)
length = ofproto.OFP_BUCKET_SIZE
offset += ofproto.OFP_BUCKET_SIZE
actions = []
while length < len_:
action = OFPAction.parser(buf, offset)
actions.append(action)
offset += action.len
length += action.len
m = cls(weigth, watch_port, watch_group, actions)
m.len = len_
return m
def serialize(self, buf, offset):
action_offset = offset + ofproto.OFP_BUCKET_SIZE
action_len = 0
for a in self.actions:
a.serialize(buf, action_offset)
action_offset += a.len
action_len += a.len
self.len = utils.round_up(ofproto.OFP_BUCKET_SIZE + action_len, 8)
msg_pack_into(ofproto.OFP_BUCKET_PACK_STR, buf, offset,
self.len, self.weight, self.watch_port,
self.watch_group)
@_set_msg_type(ofproto.OFPT_GROUP_MOD)
class OFPGroupMod(MsgBase):
"""
Modify group entry message
The controller sends this message to modify the group table.
================ ======================================================
Attribute Description
================ ======================================================
command One of the following values.
| OFPGC_ADD
| OFPGC_MODIFY
| OFPGC_DELETE
type One of the following values.
| OFPGT_ALL
| OFPGT_SELECT
| OFPGT_INDIRECT
| OFPGT_FF
group_id Group identifier
buckets list of ``OFPBucket``
================ ======================================================
``type`` attribute corresponds to ``type_`` parameter of __init__.
Example::
def send_group_mod(self, datapath):
ofp = datapath.ofproto
ofp_parser = datapath.ofproto_parser
port = 1
max_len = 2000
actions = [ofp_parser.OFPActionOutput(port, max_len)]
weight = 100
watch_port = 0
watch_group = 0
buckets = [ofp_parser.OFPBucket(weight, watch_port, watch_group,
actions)]
group_id = 1
req = ofp_parser.OFPGroupMod(datapath, ofp.OFPGC_ADD,
ofp.OFPGT_SELECT, group_id, buckets)
datapath.send_msg(req)
"""
def __init__(self, datapath, command=ofproto.OFPGC_ADD,
type_=ofproto.OFPGT_ALL, group_id=0, buckets=None):
buckets = buckets if buckets else []
super(OFPGroupMod, self).__init__(datapath)
self.command = command
self.type = type_
self.group_id = group_id
self.buckets = buckets
def _serialize_body(self):
msg_pack_into(ofproto.OFP_GROUP_MOD_PACK_STR, self.buf,
ofproto.OFP_HEADER_SIZE,
self.command, self.type, self.group_id)
offset = ofproto.OFP_GROUP_MOD_SIZE
for b in self.buckets:
b.serialize(self.buf, offset)
offset += b.len
@_set_msg_type(ofproto.OFPT_PORT_MOD)
class OFPPortMod(MsgBase):
"""
Port modification message
The controller sneds this message to modify the behavior of the port.
================ ======================================================
Attribute Description
================ ======================================================
port_no Port number to modify
hw_addr The hardware address that must be the same as hw_addr
of ``OFPPort`` of ``OFPSwitchFeatures``
config Bitmap of configuration flags.
| OFPPC_PORT_DOWN
| OFPPC_NO_RECV
| OFPPC_NO_FWD
| OFPPC_NO_PACKET_IN
mask Bitmap of configuration flags above to be changed
advertise Bitmap of the following flags.
| OFPPF_10MB_HD
| OFPPF_10MB_FD
| OFPPF_100MB_HD
| OFPPF_100MB_FD
| OFPPF_1GB_HD
| OFPPF_1GB_FD
| OFPPF_10GB_FD
| OFPPF_40GB_FD
| OFPPF_100GB_FD
| OFPPF_1TB_FD
| OFPPF_OTHER
| OFPPF_COPPER
| OFPPF_FIBER
| OFPPF_AUTONEG
| OFPPF_PAUSE
| OFPPF_PAUSE_ASYM
================ ======================================================
Example::
def send_port_mod(self, datapath):
ofp = datapath.ofproto
ofp_parser = datapath.ofproto_parser
port_no = 3
hw_addr = 'fa:c8:e8:76:1d:7e'
config = 0
mask = (ofp.OFPPC_PORT_DOWN | ofp.OFPPC_NO_RECV |
ofp.OFPPC_NO_FWD | ofp.OFPPC_NO_PACKET_IN)
advertise = (ofp.OFPPF_10MB_HD | ofp.OFPPF_100MB_FD |
ofp.OFPPF_1GB_FD | ofp.OFPPF_COPPER |
ofp.OFPPF_AUTONEG | ofp.OFPPF_PAUSE |
ofp.OFPPF_PAUSE_ASYM)
req = ofp_parser.OFPPortMod(datapath, port_no, hw_addr, config,
mask, advertise)
datapath.send_msg(req)
"""
_TYPE = {
'ascii': [
'hw_addr',
]
}
def __init__(self, datapath, port_no=0, hw_addr='00:00:00:00:00:00',
config=0, mask=0, advertise=0):
super(OFPPortMod, self).__init__(datapath)
self.port_no = port_no
self.hw_addr = hw_addr
self.config = config
self.mask = mask
self.advertise = advertise
def _serialize_body(self):
msg_pack_into(ofproto.OFP_PORT_MOD_PACK_STR, self.buf,
ofproto.OFP_HEADER_SIZE,
self.port_no, addrconv.mac.text_to_bin(self.hw_addr),
self.config,
self.mask, self.advertise)
@_set_msg_type(ofproto.OFPT_TABLE_MOD)
class OFPTableMod(MsgBase):
"""
Flow table configuration message
The controller sends this message to configure table state.
================ ======================================================
Attribute Description
================ ======================================================
table_id ID of the table (OFPTT_ALL indicates all tables)
config Bitmap of the following flags.
| OFPTC_TABLE_MISS_CONTROLLER
| OFPTC_TABLE_MISS_CONTINUE
| OFPTC_TABLE_MISS_DROP
| OFPTC_TABLE_MISS_MASK
================ ======================================================
Example::
def send_table_mod(self, datapath):
ofp = datapath.ofproto
ofp_parser = datapath.ofproto_parser
req = ofp_parser.OFPTableMod(datapath, ofp.OFPTT_ALL,
ofp.OFPTC_TABLE_MISS_DROP)
datapath.send_msg(req)
"""
def __init__(self, datapath, table_id, config):
super(OFPTableMod, self).__init__(datapath)
self.table_id = table_id
self.config = config
def _serialize_body(self):
msg_pack_into(ofproto.OFP_TABLE_MOD_PACK_STR, self.buf,
ofproto.OFP_HEADER_SIZE,
self.table_id, self.config)
class OFPStatsRequest(MsgBase):
def __init__(self, datapath, type_, flags=0):
super(OFPStatsRequest, self).__init__(datapath)
self.type = type_
self.flags = flags
def to_jsondict(self):
# remove some redundant attributes
d = super(OFPStatsRequest, self).to_jsondict()
v = d[self.__class__.__name__]
del v['type'] # implied by subclass
return d
def _serialize_stats_body(self):
pass
def _serialize_body(self):
msg_pack_into(ofproto.OFP_STATS_REQUEST_PACK_STR,
self.buf, ofproto.OFP_HEADER_SIZE,
self.type, self.flags)
self._serialize_stats_body()
@_register_parser
@_set_msg_type(ofproto.OFPT_STATS_REPLY)
class OFPStatsReply(MsgBase):
_STATS_TYPES = {}
@staticmethod
def register_stats_reply_type(type_, body_single_struct=False):
def _register_stats_reply_type(cls):
OFPStatsReply._STATS_TYPES[type_] = cls
cls.cls_body_single_struct = body_single_struct
return cls
return _register_stats_reply_type
def __init__(self, datapath, type_=None, flags=None, body=None):
super(OFPStatsReply, self).__init__(datapath)
self.type = type_
self.flags = flags
self.body = body
@classmethod
def parser(cls, datapath, version, msg_type, msg_len, xid, buf):
msg = super(OFPStatsReply, cls).parser(datapath, version, msg_type,
msg_len, xid, buf)
msg.type, msg.flags = struct.unpack_from(
ofproto.OFP_STATS_REPLY_PACK_STR, msg.buf,
ofproto.OFP_HEADER_SIZE)
stats_type_cls = cls._STATS_TYPES.get(msg.type)
offset = ofproto.OFP_STATS_REPLY_SIZE
body = []
while offset < msg_len:
r = stats_type_cls.parser(msg.buf, offset)
body.append(r)
offset += r.length
if stats_type_cls.cls_body_single_struct:
msg.body = body[0]
else:
msg.body = body
return msg
@_set_msg_type(ofproto.OFPT_STATS_REQUEST)
class OFPDescStatsRequest(OFPStatsRequest):
"""
Description statistics request message
The controller uses this message to query description of the switch.
================ ======================================================
Attribute Description
================ ======================================================
flags Zero (none yet defined in the spec)
================ ======================================================
Example::
def send_desc_stats_request(self, datapath):
ofp_parser = datapath.ofproto_parser
req = ofp_parser.OFPDescStatsRequest(datapath)
datapath.send_msg(req)
"""
def __init__(self, datapath, flags=0):
super(OFPDescStatsRequest, self).__init__(datapath,
ofproto.OFPST_DESC,
flags)
@OFPStatsReply.register_stats_reply_type(ofproto.OFPST_DESC,
body_single_struct=True)
class OFPDescStats(ofproto_parser.namedtuple('OFPDescStats', (
'mfr_desc', 'hw_desc', 'sw_desc', 'serial_num', 'dp_desc'))):
"""
Description statistics reply message
The switch responds with a stats reply that include this message to
a description statistics request.
================ ======================================================
Attribute Description
================ ======================================================
mfr_desc Manufacturer description
hw_desc Hardware description
sw_desc Software description
serial_num Serial number
dp_desc Human readable description of datapath
================ ======================================================
Example::
@set_ev_cls(ofp_event.EventOFPStatsReply, MAIN_DISPATCHER)
def stats_reply_handler(self, ev):
msg = ev.msg
ofp = msg.datapath.ofproto
body = ev.msg.body
if msg.type == ofp.OFPST_DESC:
self.desc_stats_reply_handler(body)
def desc_stats_reply_handler(self, body):
self.logger.debug('DescStats: mfr_desc=%s hw_desc=%s sw_desc=%s '
'serial_num=%s dp_desc=%s',
body.mfr_desc, body.hw_desc, body.sw_desc,
body.serial_num, body.dp_desc)
"""
_TYPE = {
'ascii': [
'mfr_desc',
'hw_desc',
'sw_desc',
'serial_num',
'dp_desc',
]
}
@classmethod
def parser(cls, buf, offset):
desc = struct.unpack_from(ofproto.OFP_DESC_STATS_PACK_STR,
buf, offset)
desc = list(desc)
desc = [x.rstrip(b'\0') for x in desc]
stats = cls(*desc)
stats.length = ofproto.OFP_DESC_STATS_SIZE
return stats
@_set_msg_type(ofproto.OFPT_STATS_REQUEST)
class OFPFlowStatsRequest(OFPStatsRequest):
"""
Individual flow statistics request message
The controller uses this message to query individual flow statistics.
================ ======================================================
Attribute Description
================ ======================================================
table_id ID of table to read
out_port Require matching entries to include this as an output
port
out_group Require matching entries to include this as an output
group
cookie Require matching entries to contain this cookie value
cookie_mask Mask used to restrict the cookie bits that must match
match Instance of ``OFPMatch``
flags Zero (none yet defined in the spec)
================ ======================================================
Example::
def send_flow_stats_request(self, datapath):
ofp = datapath.ofproto
ofp_parser = datapath.ofproto_parser
cookie = cookie_mask = 0
match = ofp_parser.OFPMatch(in_port=1)
req = ofp_parser.OFPFlowStatsRequest(datapath,
ofp.OFPTT_ALL,
ofp.OFPP_ANY, ofp.OFPG_ANY,
cookie, cookie_mask, match)
datapath.send_msg(req)
"""
def __init__(self, datapath, table_id=ofproto.OFPTT_ALL,
out_port=ofproto.OFPP_ANY,
out_group=ofproto.OFPG_ANY,
cookie=0, cookie_mask=0, match=None, flags=0):
super(OFPFlowStatsRequest, self).__init__(datapath,
ofproto.OFPST_FLOW,
flags)
self.table_id = table_id
self.out_port = out_port
self.out_group = out_group
self.cookie = cookie
self.cookie_mask = cookie_mask
if match is None:
match = OFPMatch()
self.match = match
def _serialize_stats_body(self):
msg_pack_into(ofproto.OFP_FLOW_STATS_REQUEST_PACK_STR,
self.buf, ofproto.OFP_STATS_REQUEST_SIZE,
self.table_id, self.out_port, self.out_group,
self.cookie, self.cookie_mask)
offset = (ofproto.OFP_STATS_REQUEST_SIZE +
ofproto.OFP_FLOW_STATS_REQUEST_SIZE -
ofproto.OFP_MATCH_SIZE)
self.match.serialize(self.buf, offset)
@OFPStatsReply.register_stats_reply_type(ofproto.OFPST_FLOW)
class OFPFlowStats(StringifyMixin):
"""
Individual flow statistics reply message
The switch responds with a stats reply that include this message to
an individual flow statistics request.
================ ======================================================
Attribute Description
================ ======================================================
table_id ID of table flow came from
duration_sec Time flow has been alive in seconds
duration_nsec Time flow has been alive in nanoseconds beyond
duration_sec
priority Priority of the entry
idle_timeout Number of seconds idle before expiration
hard_timeout Number of seconds before expiration
cookie Opaque controller-issued identifier
packet_count Number of packets in flow
byte_count Number of bytes in flow
match Instance of ``OFPMatch``
instructions list of ``OFPInstruction*`` instance
================ ======================================================
Example::
@set_ev_cls(ofp_event.EventOFPStatsReply, MAIN_DISPATCHER)
def stats_reply_handler(self, ev):
msg = ev.msg
ofp = msg.datapath.ofproto
body = ev.msg.body
if msg.type == ofp.OFPST_FLOW:
self.flow_stats_reply_handler(body)
def flow_stats_reply_handler(self, body):
flows = []
for stat in body:
flows.append('table_id=%s '
'duration_sec=%d duration_nsec=%d '
'priority=%d '
'idle_timeout=%d hard_timeout=%d '
'cookie=%d packet_count=%d byte_count=%d '
'match=%s instructions=%s' %
(stat.table_id,
stat.duration_sec, stat.duration_nsec,
stat.priority,
stat.idle_timeout, stat.hard_timeout,
stat.cookie, stat.packet_count, stat.byte_count,
stat.match, stat.instructions))
self.logger.debug('FlowStats: %s', flows)
"""
def __init__(self, table_id, duration_sec, duration_nsec,
priority, idle_timeout, hard_timeout, cookie, packet_count,
byte_count, match, instructions=None, length=None):
super(OFPFlowStats, self).__init__()
self.table_id = table_id
self.duration_sec = duration_sec
self.duration_nsec = duration_nsec
self.priority = priority
self.idle_timeout = idle_timeout
self.hard_timeout = hard_timeout
self.cookie = cookie
self.packet_count = packet_count
self.byte_count = byte_count
self.match = match
self.instructions = instructions
self.length = length
@classmethod
def parser(cls, buf, offset):
(length, table_id, duration_sec,
duration_nsec, priority,
idle_timeout, hard_timeout,
cookie, packet_count, byte_count) = struct.unpack_from(
ofproto.OFP_FLOW_STATS_PACK_STR,
buf, offset)
offset += (ofproto.OFP_FLOW_STATS_SIZE -
ofproto.OFP_MATCH_SIZE)
match = OFPMatch.parser(buf, offset)
match_length = utils.round_up(match.length, 8)
inst_length = (length - (ofproto.OFP_FLOW_STATS_SIZE -
ofproto.OFP_MATCH_SIZE + match_length))
offset += match_length
instructions = []
while inst_length > 0:
inst = OFPInstruction.parser(buf, offset)
instructions.append(inst)
offset += inst.len
inst_length -= inst.len
o = cls(table_id, duration_sec, duration_nsec, priority,
idle_timeout, hard_timeout, cookie, packet_count,
byte_count, match, instructions)
o.length = length
return o
@_set_msg_type(ofproto.OFPT_STATS_REQUEST)
class OFPAggregateStatsRequest(OFPStatsRequest):
"""
Aggregate flow statistics request message
The controller uses this message to query aggregate flow statictics.
================ ======================================================
Attribute Description
================ ======================================================
table_id ID of table to read
out_port Require matching entries to include this as an output
port
out_group Require matching entries to include this as an output
group
cookie Require matching entries to contain this cookie value
cookie_mask Mask used to restrict the cookie bits that must match
match Instance of ``OFPMatch``
flags Zero (none yet defined in the spec)
================ ======================================================
Example::
def send_aggregate_stats_request(self, datapath):
ofp = datapath.ofproto
ofp_parser = datapath.ofproto_parser
cookie = cookie_mask = 0
match = ofp_parser.OFPMatch(in_port=1)
req = ofp_parser.OFPAggregateStatsRequest(datapath, 0,
ofp.OFPTT_ALL,
ofp.OFPP_ANY,
ofp.OFPG_ANY,
cookie, cookie_mask,
match)
datapath.send_msg(req)
"""
def __init__(self, datapath, table_id=ofproto.OFPTT_ALL,
out_port=ofproto.OFPP_ANY,
out_group=ofproto.OFPP_ANY,
cookie=0, cookie_mask=0, match=None, flags=0):
super(OFPAggregateStatsRequest, self).__init__(
datapath,
ofproto.OFPST_AGGREGATE,
flags)
self.table_id = table_id
self.out_port = out_port
self.out_group = out_group
self.cookie = cookie
self.cookie_mask = cookie_mask
if match is None:
match = OFPMatch()
self.match = match
def _serialize_stats_body(self):
msg_pack_into(ofproto.OFP_AGGREGATE_STATS_REQUEST_PACK_STR,
self.buf,
ofproto.OFP_STATS_REQUEST_SIZE,
self.table_id, self.out_port, self.out_group,
self.cookie, self.cookie_mask)
offset = (ofproto.OFP_STATS_REQUEST_SIZE +
ofproto.OFP_AGGREGATE_STATS_REQUEST_SIZE -
ofproto.OFP_MATCH_SIZE)
self.match.serialize(self.buf, offset)
@OFPStatsReply.register_stats_reply_type(ofproto.OFPST_AGGREGATE,
body_single_struct=True)
class OFPAggregateStatsReply(ofproto_parser.namedtuple('OFPAggregateStats', (
'packet_count', 'byte_count', 'flow_count'))):
"""
Aggregate flow statistics reply message
The switch responds with a stats reply that include this message to
an aggregate flow statistics request.
================ ======================================================
Attribute Description
================ ======================================================
packet_count Number of packets in flows
byte_count Number of bytes in flows
flow_count Number of flows
================ ======================================================
Example::
@set_ev_cls(ofp_event.EventOFPStatsReply, MAIN_DISPATCHER)
def stats_reply_handler(self, ev):
msg = ev.msg
ofp = msg.datapath.ofproto
body = ev.msg.body
if msg.type == ofp.OFPST_AGGREGATE:
self.aggregate_stats_reply_handler(body)
def aggregate_stats_reply_handler(self, body):
self.logger.debug('AggregateStats: packet_count=%d byte_count=%d '
'flow_count=%d',
body.packet_count, body.byte_count,
body.flow_count)
"""
@classmethod
def parser(cls, buf, offset):
desc = struct.unpack_from(
ofproto.OFP_AGGREGATE_STATS_REPLY_PACK_STR,
buf, offset)
stats = cls(*desc)
stats.length = ofproto.OFP_AGGREGATE_STATS_REPLY_SIZE
return stats
@_set_msg_type(ofproto.OFPT_STATS_REQUEST)
class OFPTableStatsRequest(OFPStatsRequest):
"""
Table statistics request message
The controller uses this message to query flow table statictics.
================ ======================================================
Attribute Description
================ ======================================================
flags Zero (none yet defined in the spec)
================ ======================================================
Example::
def send_table_stats_request(self, datapath):
ofp_parser = datapath.ofproto_parser
req = ofp_parser.OFPTableStatsRequest(datapath)
datapath.send_msg(req)
"""
def __init__(self, datapath, flags=0):
super(OFPTableStatsRequest, self).__init__(datapath,
ofproto.OFPST_TABLE,
flags)
@OFPStatsReply.register_stats_reply_type(ofproto.OFPST_TABLE)
class OFPTableStats(
ofproto_parser.namedtuple('OFPTableStats',
('table_id', 'name', 'match', 'wildcards',
'write_actions', 'apply_actions',
'write_setfields', 'apply_setfields',
'metadata_match', 'metadata_write',
'instructions', 'config',
'max_entries', 'active_count',
'lookup_count', 'matched_count'))):
"""
Table statistics reply message
The switch responds with a stats reply that include this message to
a table statistics request.
================ ======================================================
Attribute Description
================ ======================================================
table_id ID of table
name table name
match Bitmap of (1 << OFPXMT_*) that indicate the fields
the table can match on
wildcards Bitmap of (1 << OFPXMT_*) wildcards that are supported
by the table
write_actions Bitmap of OFPAT_* that are supported by the table with
OFPIT_WRITE_ACTIONS
apply_actions Bitmap of OFPAT_* that are supported by the table with
OFPIT_APPLY_ACTIONS
write_setfields Bitmap of (1 << OFPXMT_*) header fields that can be set
with OFPIT_WRITE_ACTIONS
apply_setfields Bitmap of (1 << OFPXMT_*) header fields that can be set
with OFPIT_APPLY_ACTIONS
metadata_match Bits of metadata table can match
metadata_write Bits of metadata table can write
instructions Bitmap of OFPIT_* values supported
config Bitmap of OFPTC_* values
max_entries Max number of entries supported
active_count Number of active entries
lookup_count Number of packets looked up in table
matched_count Number of packets that hit table
================ ======================================================
Example::
@set_ev_cls(ofp_event.EventOFPStatsReply, MAIN_DISPATCHER)
def stats_reply_handler(self, ev):
msg = ev.msg
ofp = msg.datapath.ofproto
body = ev.msg.body
if msg.type == ofp.OFPST_TABLE:
self.table_stats_reply_handler(body)
def table_stats_reply_handler(self, body):
tables = []
for stat in body:
tables.append('table_id=%d active_count=%d lookup_count=%d '
' matched_count=%d' %
(stat.table_id, stat.active_count,
stat.lookup_count, stat.matched_count))
self.logger.debug('TableStats: %s', tables)
"""
_TYPE = {
'utf-8': [
# OF spec is unclear about the encoding of name.
# we assumes UTF-8.
'name',
]
}
@classmethod
def parser(cls, buf, offset):
table = struct.unpack_from(
ofproto.OFP_TABLE_STATS_PACK_STR,
buf, offset)
table = list(table)
i = cls._fields.index('name')
table[i] = table[i].rstrip(b'\0')
stats = cls(*table)
stats.length = ofproto.OFP_TABLE_STATS_SIZE
return stats
@_set_msg_type(ofproto.OFPT_STATS_REQUEST)
class OFPPortStatsRequest(OFPStatsRequest):
"""
Port statistics request message
The controller uses this message to query information about ports
statistics.
================ ======================================================
Attribute Description
================ ======================================================
port_no Port number to read (OFPP_ANY to all ports)
flags Zero (none yet defined in the spec)
================ ======================================================
Example::
def send_port_stats_request(self, datapath):
ofp = datapath.ofproto
ofp_parser = datapath.ofproto_parser
req = ofp_parser.OFPPortStatsRequest(datapath, ofp.OFPP_ANY)
datapath.send_msg(req)
"""
def __init__(self, datapath, port_no=ofproto.OFPP_ANY, flags=0):
super(OFPPortStatsRequest, self).__init__(datapath,
ofproto.OFPST_PORT,
flags)
self.port_no = port_no
def _serialize_stats_body(self):
msg_pack_into(ofproto.OFP_PORT_STATS_REQUEST_PACK_STR,
self.buf, ofproto.OFP_STATS_REQUEST_SIZE,
self.port_no)
@OFPStatsReply.register_stats_reply_type(ofproto.OFPST_PORT)
class OFPPortStats(
ofproto_parser.namedtuple('OFPPortStats',
('port_no', 'rx_packets', 'tx_packets',
'rx_bytes', 'tx_bytes',
'rx_dropped', 'tx_dropped',
'rx_errors', 'tx_errors',
'rx_frame_err', 'rx_over_err',
'rx_crc_err', 'collisions'))):
"""
Port statistics reply message
The switch responds with a stats reply that include this message to
a port statistics request.
================ ======================================================
Attribute Description
================ ======================================================
port_no Port number
rx_packets Number of received packets
tx_packets Number of transmitted packets
rx_bytes Number of received bytes
tx_bytes Number of transmitted bytes
rx_dropped Number of packets dropped by RX
tx_dropped Number of packets dropped by TX
rx_errors Number of receive errors
tx_errors Number of transmit errors
rx_frame_err Number of frame alignment errors
rx_over_err Number of packet with RX overrun
rx_crc_err Number of CRC errors
collisions Number of collisions
================ ======================================================
Example::
@set_ev_cls(ofp_event.EventOFPStatsReply, MAIN_DISPATCHER)
def stats_reply_handler(self, ev):
msg = ev.msg
ofp = msg.datapath.ofproto
body = ev.msg.body
if msg.type == ofp.OFPST_PORT:
self.port_stats_reply_handler(body)
def port_stats_reply_handler(self, body):
ports = []
for stat in body:
ports.append('port_no=%d '
'rx_packets=%d tx_packets=%d '
'rx_bytes=%d tx_bytes=%d '
'rx_dropped=%d tx_dropped=%d '
'rx_errors=%d tx_errors=%d '
'rx_frame_err=%d rx_over_err=%d rx_crc_err=%d '
'collisions=%d' %
(stat.port_no,
stat.rx_packets, stat.tx_packets,
stat.rx_bytes, stat.tx_bytes,
stat.rx_dropped, stat.tx_dropped,
stat.rx_errors, stat.tx_errors,
stat.rx_frame_err, stat.rx_over_err,
stat.rx_crc_err, stat.collisions))
self.logger.debug('PortStats: %s', ports)
"""
@classmethod
def parser(cls, buf, offset):
port = struct.unpack_from(ofproto.OFP_PORT_STATS_PACK_STR,
buf, offset)
stats = cls(*port)
stats.length = ofproto.OFP_PORT_STATS_SIZE
return stats
@_set_msg_type(ofproto.OFPT_STATS_REQUEST)
class OFPQueueStatsRequest(OFPStatsRequest):
"""
Queue statistics request message
The controller uses this message to query queue statictics.
================ ======================================================
Attribute Description
================ ======================================================
port_no Port number to read
queue_id ID of queue to read
flags Zero (none yet defined in the spec)
================ ======================================================
Example::
def send_queue_stats_request(self, datapath):
ofp = datapath.ofproto
ofp_parser = datapath.ofproto_parser
req = ofp_parser.OFPQueueStatsRequest(datapath, ofp.OFPP_ANY,
ofp.OFPQ_ALL)
datapath.send_msg(req)
"""
def __init__(self, datapath, port_no=ofproto.OFPP_ANY,
queue_id=ofproto.OFPQ_ALL, flags=0):
super(OFPQueueStatsRequest, self).__init__(datapath,
ofproto.OFPST_QUEUE,
flags)
self.port_no = port_no
self.queue_id = queue_id
def _serialize_stats_body(self):
msg_pack_into(ofproto.OFP_QUEUE_STATS_REQUEST_PACK_STR,
self.buf, ofproto.OFP_STATS_REQUEST_SIZE,
self.port_no, self.queue_id)
@OFPStatsReply.register_stats_reply_type(ofproto.OFPST_QUEUE)
class OFPQueueStats(
ofproto_parser.namedtuple('OFPQueueStats',
('port_no', 'queue_id', 'tx_bytes',
'tx_packets', 'tx_errors'))):
"""
Queue statistics reply message
The switch responds with a stats reply that include this message to
an aggregate flow statistics request.
================ ======================================================
Attribute Description
================ ======================================================
port_no Port number
queue_id ID of queue
tx_bytes Number of transmitted bytes
tx_packets Number of transmitted packets
tx_errors Number of packets dropped due to overrun
================ ======================================================
Example::
@set_ev_cls(ofp_event.EventOFPStatsReply, MAIN_DISPATCHER)
def stats_reply_handler(self, ev):
msg = ev.msg
ofp = msg.datapath.ofproto
body = ev.msg.body
if msg.type == ofp.OFPST_QUEUE:
self.queue_stats_reply_handler(body)
def queue_stats_reply_handler(self, body):
queues = []
for stat in body:
queues.append('port_no=%d queue_id=%d '
'tx_bytes=%d tx_packets=%d tx_errors=%d ' %
(stat.port_no, stat.queue_id,
stat.tx_bytes, stat.tx_packets, stat.tx_errors))
self.logger.debug('QueueStats: %s', queues)
"""
@classmethod
def parser(cls, buf, offset):
queue = struct.unpack_from(ofproto.OFP_QUEUE_STATS_PACK_STR,
buf, offset)
stats = cls(*queue)
stats.length = ofproto.OFP_QUEUE_STATS_SIZE
return stats
class OFPBucketCounter(StringifyMixin):
def __init__(self, packet_count, byte_count):
super(OFPBucketCounter, self).__init__()
self.packet_count = packet_count
self.byte_count = byte_count
@classmethod
def parser(cls, buf, offset):
packet, byte = struct.unpack_from(
ofproto.OFP_BUCKET_COUNTER_PACK_STR,
buf, offset)
return cls(packet, byte)
@_set_msg_type(ofproto.OFPT_STATS_REQUEST)
class OFPGroupStatsRequest(OFPStatsRequest):
"""
Group statistics request message
The controller uses this message to query statistics of one or more
groups.
================ ======================================================
Attribute Description
================ ======================================================
group_id ID of group to read (OFPG_ALL to all groups)
flags Zero (none yet defined in the spec)
================ ======================================================
Example::
def send_group_stats_request(self, datapath):
ofp = datapath.ofproto
ofp_parser = datapath.ofproto_parser
req = ofp_parser.OFPGroupStatsRequest(datapath, ofp.OFPG_ALL)
datapath.send_msg(req)
"""
def __init__(self, datapath, group_id=ofproto.OFPG_ALL, flags=0):
super(OFPGroupStatsRequest, self).__init__(datapath,
ofproto.OFPST_GROUP,
flags)
self.group_id = group_id
def _serialize_stats_body(self):
msg_pack_into(ofproto.OFP_GROUP_STATS_REQUEST_PACK_STR,
self.buf, ofproto.OFP_STATS_REQUEST_SIZE,
self.group_id)
@OFPStatsReply.register_stats_reply_type(ofproto.OFPST_GROUP)
class OFPGroupStats(StringifyMixin):
"""
Group statistics reply message
The switch responds with a stats reply that include this message to
a group statistics request.
================ ======================================================
Attribute Description
================ ======================================================
group_id Group identifier
ref_count Number of flows or groups that directly forward to
this group
packet_count Number of packets processed by group
byte_count Number of bytes processed by group
bucket_counters List of ``OFPBucketCounter`` instance
================ ======================================================
Example::
@set_ev_cls(ofp_event.EventOFPStatsReply, MAIN_DISPATCHER)
def stats_reply_handler(self, ev):
msg = ev.msg
ofp = msg.datapath.ofproto
body = ev.msg.body
if msg.type == ofp.OFPST_GROUP:
self.group_stats_reply_handler(body)
def group_stats_reply_handler(self, body):
groups = []
for stat in body:
groups.append('group_id=%d ref_count=%d packet_count=%d '
'byte_count=%d bucket_counters=%s' %
(stat.group_id,
stat.ref_count, stat.packet_count,
stat.byte_count, stat.bucket_counters))
self.logger.debug('GroupStats: %s', groups)
"""
def __init__(self, group_id, ref_count, packet_count,
byte_count, bucket_counters, length=None):
super(OFPGroupStats, self).__init__()
self.group_id = group_id
self.ref_count = ref_count
self.packet_count = packet_count
self.byte_count = byte_count
self.bucket_counters = bucket_counters
self.length = length
@classmethod
def parser(cls, buf, offset):
(length, group_id, ref_count, packet_count,
byte_count) = struct.unpack_from(
ofproto.OFP_GROUP_STATS_PACK_STR,
buf, offset)
bucket_len = length - ofproto.OFP_GROUP_STATS_SIZE
offset += ofproto.OFP_GROUP_STATS_SIZE
bucket_counters = []
while bucket_len > 0:
bucket_counters.append(OFPBucketCounter.parser(buf, offset))
offset += ofproto.OFP_BUCKET_COUNTER_SIZE
bucket_len -= ofproto.OFP_BUCKET_COUNTER_SIZE
o = cls(group_id, ref_count, packet_count,
byte_count, bucket_counters)
o.length = length
return o
@_set_msg_type(ofproto.OFPT_STATS_REQUEST)
class OFPGroupDescStatsRequest(OFPStatsRequest):
"""
Group description request message
The controller uses this message to list the set of groups on a switch.
================ ======================================================
Attribute Description
================ ======================================================
flags Zero (none yet defined in the spec)
================ ======================================================
Example::
def send_group_desc_stats_request(self, datapath):
ofp_parser = datapath.ofproto_parser
req = ofp_parser.OFPGroupDescStatsRequest(datapath)
datapath.send_msg(req)
"""
def __init__(self, datapath, flags=0):
super(OFPGroupDescStatsRequest, self).__init__(
datapath,
ofproto.OFPST_GROUP_DESC,
flags)
@OFPStatsReply.register_stats_reply_type(ofproto.OFPST_GROUP_DESC)
class OFPGroupDescStats(StringifyMixin):
"""
Group description reply message
The switch responds with a stats reply that include this message to
a group description request.
================ ======================================================
Attribute Description
================ ======================================================
type One of OFPGT_*
group_id Group identifier
buckets List of ``OFPBucket`` instance
================ ======================================================
``type`` attribute corresponds to ``type_`` parameter of __init__.
Example::
@set_ev_cls(ofp_event.EventOFPStatsReply, MAIN_DISPATCHER)
def stats_reply_handler(self, ev):
msg = ev.msg
ofp = msg.datapath.ofproto
body = ev.msg.body
if msg.type == ofp.OFPST_GROUP_DESC:
self.group_desc_stats_reply_handler(body)
def group_desc_stats_reply_handler(self, body):
descs = []
for stat in body:
descs.append('type=%d group_id=%d buckets=%s' %
(stat.type, stat.group_id, stat.buckets))
self.logger.debug('GroupDescStats: %s', descs)
"""
def __init__(self, type_, group_id, buckets, length=None):
self.type = type_
self.group_id = group_id
self.buckets = buckets
@classmethod
def parser(cls, buf, offset):
(length, type_, group_id) = struct.unpack_from(
ofproto.OFP_GROUP_DESC_STATS_PACK_STR,
buf, offset)
bucket_len = length - ofproto.OFP_GROUP_DESC_STATS_SIZE
offset += ofproto.OFP_GROUP_DESC_STATS_SIZE
buckets = []
while bucket_len > 0:
bucket = OFPBucket.parser(buf, offset)
buckets.append(bucket)
offset += bucket.len
bucket_len -= bucket.len
o = cls(type_, group_id, buckets)
o.length = length
return o
@_set_msg_type(ofproto.OFPT_STATS_REQUEST)
class OFPGroupFeaturesStatsRequest(OFPStatsRequest):
"""
Group features request message
The controller uses this message to list the capabilities of groups on
a switch.
================ ======================================================
Attribute Description
================ ======================================================
flags Zero (none yet defined in the spec)
================ ======================================================
Example::
def send_group_features_stats_request(self, datapath):
ofp_parser = datapath.ofproto_parser
req = ofp_parser.OFPGroupFeaturesStatsRequest(datapath)
datapath.send_msg(req)
"""
def __init__(self, datapath, flags=0):
super(OFPGroupFeaturesStatsRequest, self).__init__(
datapath,
ofproto.OFPST_GROUP_FEATURES,
flags)
@OFPStatsReply.register_stats_reply_type(ofproto.OFPST_GROUP_FEATURES,
body_single_struct=True)
class OFPGroupFeaturesStats(StringifyMixin):
"""
Group features reply message
The switch responds with a stats reply that include this message to
a group features request.
================ ======================================================
Attribute Description
================ ======================================================
types Bitmap of OFPGT_* values supported
capabilities Bitmap of OFPGFC_* capability supported
max_groups Maximum number of groups for each type
actions Bitmaps of OFPAT_* that are supported
================ ======================================================
Example::
@set_ev_cls(ofp_event.EventOFPStatsReply, MAIN_DISPATCHER)
def stats_reply_handler(self, ev):
msg = ev.msg
ofp = msg.datapath.ofproto
body = ev.msg.body
if msg.type == ofp.OFPST_GROUP_FEATURES:
self.group_features_stats_reply_handler(body)
def group_features_stats_reply_handler(self, body):
self.logger.debug('GroupFeaturesStats: types=%d '
'capabilities=0x%08x max_groups=%s '
'actions=%s',
body.types, body.capabilities, body.max_groups,
body.actions)
"""
def __init__(self, types, capabilities, max_groups, actions, length=None):
self.types = types
self.capabilities = capabilities
self.max_groups = max_groups
self.actions = actions
@classmethod
def parser(cls, buf, offset):
stats = struct.unpack_from(
ofproto.OFP_GROUP_FEATURES_STATS_PACK_STR, buf, offset)
types = stats[0]
capabilities = stats[1]
max_groups = list(stats[2:6])
actions = list(stats[6:10])
o = cls(types, capabilities, max_groups, actions)
o.length = ofproto.OFP_GROUP_FEATURES_STATS_SIZE
return o
@_set_msg_type(ofproto.OFPT_QUEUE_GET_CONFIG_REQUEST)
class OFPQueueGetConfigRequest(MsgBase):
"""
Queue configuration request message
================ ======================================================
Attribute Description
================ ======================================================
port Port to be queried (OFPP_ANY to all configured queues)
================ ======================================================
Example::
def send_queue_get_config_request(self, datapath):
ofp = datapath.ofproto
ofp_parser = datapath.ofproto_parser
req = ofp_parser.OFPQueueGetConfigRequest(datapath, ofp.OFPP_ANY)
datapath.send_msg(req)
"""
def __init__(self, datapath, port):
super(OFPQueueGetConfigRequest, self).__init__(datapath)
self.port = port
def _serialize_body(self):
msg_pack_into(ofproto.OFP_QUEUE_GET_CONFIG_REQUEST_PACK_STR,
self.buf, ofproto.OFP_HEADER_SIZE, self.port)
class OFPQueuePropHeader(StringifyMixin):
def __init__(self, property_, len_=None):
self.property = property_
self.len = len_
def serialize(self, buf, offset):
msg_pack_into(ofproto.OFP_QUEUE_PROP_HEADER_PACK_STR,
buf, offset, self.property, self.len)
class OFPQueueProp(OFPQueuePropHeader):
_QUEUE_PROP_PROPERTIES = {}
@staticmethod
def register_property(property_, len_):
def _register_property(cls):
cls.cls_property = property_
cls.cls_len = len_
OFPQueueProp._QUEUE_PROP_PROPERTIES[cls.cls_property] = cls
return cls
return _register_property
def __init__(self):
cls = self.__class__
super(OFPQueueProp, self).__init__(cls.cls_property,
cls.cls_len)
@classmethod
def parser(cls, buf, offset):
(property_, len_) = struct.unpack_from(
ofproto.OFP_QUEUE_PROP_HEADER_PACK_STR,
buf, offset)
cls_ = cls._QUEUE_PROP_PROPERTIES.get(property_)
offset += ofproto.OFP_QUEUE_PROP_HEADER_SIZE
return cls_.parser(buf, offset)
class OFPPacketQueue(StringifyMixin):
def __init__(self, queue_id, port, properties, len_=None):
super(OFPPacketQueue, self).__init__()
self.queue_id = queue_id
self.port = port
self.len = len_
self.properties = properties
@classmethod
def parser(cls, buf, offset):
(queue_id, port, len_) = struct.unpack_from(
ofproto.OFP_PACKET_QUEUE_PACK_STR, buf, offset)
length = ofproto.OFP_PACKET_QUEUE_SIZE
offset += ofproto.OFP_PACKET_QUEUE_SIZE
properties = []
while length < len_:
queue_prop = OFPQueueProp.parser(buf, offset)
properties.append(queue_prop)
offset += queue_prop.len
length += queue_prop.len
o = cls(queue_id, port, properties)
o.len = len_
return o
@OFPQueueProp.register_property(ofproto.OFPQT_MIN_RATE,
ofproto.OFP_QUEUE_PROP_MIN_RATE_SIZE)
class OFPQueuePropMinRate(OFPQueueProp):
def __init__(self, rate, property_=None, len_=None):
super(OFPQueuePropMinRate, self).__init__()
self.rate = rate
@classmethod
def parser(cls, buf, offset):
(rate,) = struct.unpack_from(
ofproto.OFP_QUEUE_PROP_MIN_RATE_PACK_STR, buf, offset)
return cls(rate)
@OFPQueueProp.register_property(ofproto.OFPQT_MAX_RATE,
ofproto.OFP_QUEUE_PROP_MAX_RATE_SIZE)
class OFPQueuePropMaxRate(OFPQueueProp):
def __init__(self, rate, property_=None, len_=None):
super(OFPQueuePropMaxRate, self).__init__()
self.rate = rate
@classmethod
def parser(cls, buf, offset):
(rate,) = struct.unpack_from(
ofproto.OFP_QUEUE_PROP_MAX_RATE_PACK_STR, buf, offset)
return cls(rate)
@_register_parser
@_set_msg_type(ofproto.OFPT_QUEUE_GET_CONFIG_REPLY)
class OFPQueueGetConfigReply(MsgBase):
"""
Queue configuration reply message
The switch responds with this message to a queue configuration request.
================ ======================================================
Attribute Description
================ ======================================================
port Port which was queried
queues list of ``OFPPacketQueue`` instance
================ ======================================================
Example::
@set_ev_cls(ofp_event.EventOFPQueueGetConfigReply, MAIN_DISPATCHER)
def queue_get_config_reply_handler(self, ev):
msg = ev.msg
self.logger.debug('OFPQueueGetConfigReply received: '
'port=%s queues=%s',
msg.port, msg.queues)
"""
def __init__(self, datapath, port=None, queues=None):
super(OFPQueueGetConfigReply, self).__init__(datapath)
self.port = port
self.queues = queues
@classmethod
def parser(cls, datapath, version, msg_type, msg_len, xid, buf):
msg = super(OFPQueueGetConfigReply, cls).parser(datapath, version,
msg_type,
msg_len, xid, buf)
(msg.port,) = struct.unpack_from(
ofproto.OFP_QUEUE_GET_CONFIG_REPLY_PACK_STR, msg.buf,
ofproto.OFP_HEADER_SIZE)
msg.queues = []
length = ofproto.OFP_QUEUE_GET_CONFIG_REPLY_SIZE
offset = ofproto.OFP_QUEUE_GET_CONFIG_REPLY_SIZE
while length < msg.msg_len:
queue = OFPPacketQueue.parser(msg.buf, offset)
msg.queues.append(queue)
offset += queue.len
length += queue.len
return msg
@_set_msg_type(ofproto.OFPT_BARRIER_REQUEST)
class OFPBarrierRequest(MsgBase):
"""
Barrier request message
The controller sends this message to ensure message dependencies have
been met or receive notifications for completed operations.
Example::
def send_barrier_request(self, datapath):
ofp_parser = datapath.ofproto_parser
req = ofp_parser.OFPBarrierRequest(datapath)
datapath.send_msg(req)
"""
def __init__(self, datapath):
super(OFPBarrierRequest, self).__init__(datapath)
@_register_parser
@_set_msg_type(ofproto.OFPT_BARRIER_REPLY)
class OFPBarrierReply(MsgBase):
"""
Barrier reply message
The switch responds with this message to a barrier request.
Example::
@set_ev_cls(ofp_event.EventOFPBarrierReply, MAIN_DISPATCHER)
def barrier_reply_handler(self, ev):
self.logger.debug('OFPBarrierReply received')
"""
def __init__(self, datapath):
super(OFPBarrierReply, self).__init__(datapath)
@_set_msg_type(ofproto.OFPT_ROLE_REQUEST)
class OFPRoleRequest(MsgBase):
"""
Role request message
The controller uses this message to change its role.
================ ======================================================
Attribute Description
================ ======================================================
role One of the following values.
| OFPCR_ROLE_NOCHANGE
| OFPCR_ROLE_EQUAL
| OFPCR_ROLE_MASTER
| OFPCR_ROLE_SLAVE
generation_id Master Election Generation ID
================ ======================================================
Example::
def send_role_request(self, datapath):
ofp = datapath.ofproto
ofp_parser = datapath.ofproto_parser
req = ofp_parser.OFPRoleRequest(datapath, ofp.OFPCR_ROLE_EQUAL, 0)
datapath.send_msg(req)
"""
def __init__(self, datapath, role, generation_id):
super(OFPRoleRequest, self).__init__(datapath)
self.role = role
self.generation_id = generation_id
def _serialize_body(self):
msg_pack_into(ofproto.OFP_ROLE_REQUEST_PACK_STR,
self.buf, ofproto.OFP_HEADER_SIZE,
self.role, self.generation_id)
@_register_parser
@_set_msg_type(ofproto.OFPT_ROLE_REPLY)
class OFPRoleReply(MsgBase):
"""
Role reply message
The switch responds with this message to a role request.
================ ======================================================
Attribute Description
================ ======================================================
role One of the following values.
| OFPCR_ROLE_NOCHANGE
| OFPCR_ROLE_EQUAL
| OFPCR_ROLE_MASTER
| OFPCR_ROLE_SLAVE
generation_id Master Election Generation ID
================ ======================================================
Example::
@set_ev_cls(ofp_event.EventOFPRoleReply, MAIN_DISPATCHER)
def role_reply_handler(self, ev):
msg = ev.msg
dp = msg.datapath
ofp = dp.ofproto
if msg.role == ofp.OFPCR_ROLE_NOCHANGE:
role = 'NOCHANGE'
elif msg.role == ofp.OFPCR_ROLE_EQUAL:
role = 'EQUAL'
elif msg.role == ofp.OFPCR_ROLE_MASTER:
role = 'MASTER'
elif msg.role == ofp.OFPCR_ROLE_SLAVE:
role = 'SLAVE'
else:
role = 'unknown'
self.logger.debug('OFPRoleReply received: '
'role=%s generation_id=%d',
role, msg.generation_id)
"""
def __init__(self, datapath, role=None, generation_id=None):
super(OFPRoleReply, self).__init__(datapath)
self.role = role
self.generation_id = generation_id
@classmethod
def parser(cls, datapath, version, msg_type, msg_len, xid, buf):
msg = super(OFPRoleReply, cls).parser(datapath, version,
msg_type,
msg_len, xid, buf)
(msg.role, msg.generation_id) = struct.unpack_from(
ofproto.OFP_ROLE_REQUEST_PACK_STR, msg.buf,
ofproto.OFP_HEADER_SIZE)
return msg
UINT64_MAX = (1 << 64) - 1
UINT32_MAX = (1 << 32) - 1
UINT16_MAX = (1 << 16) - 1
class Flow(object):
def __init__(self):
self.in_port = 0
self.in_phy_port = 0
self.metadata = 0
self.dl_dst = mac.DONTCARE
self.dl_src = mac.DONTCARE
self.dl_type = 0
self.vlan_vid = 0
self.vlan_pcp = 0
self.ip_dscp = 0
self.ip_ecn = 0
self.ip_proto = 0
self.ipv4_src = 0
self.ipv4_dst = 0
self.tcp_src = 0
self.tcp_dst = 0
self.udp_src = 0
self.udp_dst = 0
self.sctp_src = 0
self.sctp_dst = 0
self.icmpv4_type = 0
self.icmpv4_code = 0
self.arp_op = 0
self.arp_spa = 0
self.arp_tpa = 0
self.arp_sha = 0
self.arp_tha = 0
self.ipv6_src = []
self.ipv6_dst = []
self.ipv6_flabel = 0
self.icmpv6_type = 0
self.icmpv6_code = 0
self.ipv6_nd_target = []
self.ipv6_nd_sll = 0
self.ipv6_nd_tll = 0
self.mpls_label = 0
self.mpls_tc = 0
class FlowWildcards(object):
def __init__(self):
self.metadata_mask = 0
self.dl_dst_mask = 0
self.dl_src_mask = 0
self.vlan_vid_mask = 0
self.ipv4_src_mask = 0
self.ipv4_dst_mask = 0
self.arp_spa_mask = 0
self.arp_tpa_mask = 0
self.arp_sha_mask = 0
self.arp_tha_mask = 0
self.ipv6_src_mask = []
self.ipv6_dst_mask = []
self.ipv6_flabel_mask = 0
self.wildcards = (1 << 64) - 1
def ft_set(self, shift):
self.wildcards &= ~(1 << shift)
def ft_test(self, shift):
return not self.wildcards & (1 << shift)
class OFPMatch(StringifyMixin):
"""
Flow Match Structure
This class is implementation of the flow match structure having
compose/query API.
There are new API and old API for compatibility. the old API is
supposed to be removed later.
You can define the flow match by the keyword arguments.
The following arguments are available.
================ =============== ==================================
Argument Value Description
================ =============== ==================================
in_port Integer 32bit Switch input port
in_phy_port Integer 32bit Switch physical input port
metadata Integer 64bit Metadata passed between tables
eth_dst MAC address Ethernet destination address
eth_src MAC address Ethernet source address
eth_type Integer 16bit Ethernet frame type
vlan_vid Integer 16bit VLAN id
vlan_pcp Integer 8bit VLAN priority
ip_dscp Integer 8bit IP DSCP (6 bits in ToS field)
ip_ecn Integer 8bit IP ECN (2 bits in ToS field)
ip_proto Integer 8bit IP protocol
ipv4_src IPv4 address IPv4 source address
ipv4_dst IPv4 address IPv4 destination address
tcp_src Integer 16bit TCP source port
tcp_dst Integer 16bit TCP destination port
udp_src Integer 16bit UDP source port
udp_dst Integer 16bit UDP destination port
sctp_src Integer 16bit SCTP source port
sctp_dst Integer 16bit SCTP destination port
icmpv4_type Integer 8bit ICMP type
icmpv4_code Integer 8bit ICMP code
arp_op Integer 16bit ARP opcode
arp_spa IPv4 address ARP source IPv4 address
arp_tpa IPv4 address ARP target IPv4 address
arp_sha MAC address ARP source hardware address
arp_tha MAC address ARP target hardware address
ipv6_src IPv6 address IPv6 source address
ipv6_dst IPv6 address IPv6 destination address
ipv6_flabel Integer 32bit IPv6 Flow Label
icmpv6_type Integer 8bit ICMPv6 type
icmpv6_code Integer 8bit ICMPv6 code
ipv6_nd_target IPv6 address Target address for ND
ipv6_nd_sll MAC address Source link-layer for ND
ipv6_nd_tll MAC address Target link-layer for ND
mpls_label Integer 32bit MPLS label
mpls_tc Integer 8bit MPLS TC
pbb_uca Integer 8bit PBB UCA header field
(EXT-256 Old version of ONF Extension)
tcp_flags Integer 16bit TCP flags
(EXT-109 ONF Extension)
actset_output Integer 32bit Output port from action set metadata
(EXT-233 ONF Extension)
================ =============== ==================================
Example::
>>> # compose
>>> match = parser.OFPMatch(
... in_port=1,
... eth_type=0x86dd,
... ipv6_src=('2001:db8:bd05:1d2:288a:1fc0:1:10ee',
... 'ffff:ffff:ffff:ffff::'),
... ipv6_dst='2001:db8:bd05:1d2:288a:1fc0:1:10ee')
>>> # query
>>> if 'ipv6_src' in match:
... print match['ipv6_src']
...
('2001:db8:bd05:1d2:288a:1fc0:1:10ee', 'ffff:ffff:ffff:ffff::')
.. Note::
For the list of the supported Nicira experimenter matches,
please refer to :ref:`os_ken.ofproto.nx_match <nx_match_structures>`.
.. Note::
For VLAN id match field, special values are defined in OpenFlow Spec.
1) Packets with and without a VLAN tag
- Example::
match = parser.OFPMatch()
- Packet Matching
====================== =====
non-VLAN-tagged MATCH
VLAN-tagged(vlan_id=3) MATCH
VLAN-tagged(vlan_id=5) MATCH
====================== =====
2) Only packets without a VLAN tag
- Example::
match = parser.OFPMatch(vlan_vid=0x0000)
- Packet Matching
====================== =====
non-VLAN-tagged MATCH
VLAN-tagged(vlan_id=3) x
VLAN-tagged(vlan_id=5) x
====================== =====
3) Only packets with a VLAN tag regardless of its value
- Example::
match = parser.OFPMatch(vlan_vid=(0x1000, 0x1000))
- Packet Matching
====================== =====
non-VLAN-tagged x
VLAN-tagged(vlan_id=3) MATCH
VLAN-tagged(vlan_id=5) MATCH
====================== =====
4) Only packets with VLAN tag and VID equal
- Example::
match = parser.OFPMatch(vlan_vid=(0x1000 | 3))
- Packet Matching
====================== =====
non-VLAN-tagged x
VLAN-tagged(vlan_id=3) MATCH
VLAN-tagged(vlan_id=5) x
====================== =====
"""
def __init__(self, type_=None, length=None, _ordered_fields=None,
**kwargs):
super(OFPMatch, self).__init__()
self._wc = FlowWildcards()
self._flow = Flow()
self.fields = []
self.type = ofproto.OFPMT_OXM
self.length = length
if _ordered_fields is not None:
assert not kwargs
self._fields2 = _ordered_fields
else:
# eg.
# OFPMatch(eth_src=('ff:ff:ff:00:00:00'), eth_type=0x800,
# ipv4_src='10.0.0.1')
kwargs = dict(ofproto.oxm_normalize_user(k, v) for
(k, v) in kwargs.items())
fields = [ofproto.oxm_from_user(k, v) for (k, v)
in kwargs.items()]
# assumption: sorting by OXM type values makes fields
# meet ordering requirements (eg. eth_type before ipv4_src)
fields.sort(
key=lambda x: x[0][0] if isinstance(x[0], tuple) else x[0])
self._fields2 = [ofproto.oxm_to_user(n, v, m) for (n, v, m)
in fields]
def __getitem__(self, key):
return dict(self._fields2)[key]
def __contains__(self, key):
return key in dict(self._fields2)
def iteritems(self):
return iter(dict(self._fields2).items())
def items(self):
return self._fields2
def get(self, key, default=None):
return dict(self._fields2).get(key, default)
def stringify_attrs(self):
yield "oxm_fields", dict(self._fields2)
def to_jsondict(self):
"""
Returns a dict expressing the flow match.
"""
# XXX old api compat
if self._composed_with_old_api():
# copy object first because serialize_old is destructive
o2 = OFPMatch()
o2.fields = self.fields[:]
# serialize and parse to fill OFPMatch._fields2
buf = bytearray()
o2.serialize(buf, 0)
o = OFPMatch.parser(six.binary_type(buf), 0)
else:
o = self
body = {"oxm_fields": [ofproto.oxm_to_jsondict(k, uv) for k, uv
in o._fields2],
"length": o.length,
"type": o.type}
return {self.__class__.__name__: body}
@classmethod
def from_jsondict(cls, dict_):
"""
Returns an object which is generated from a dict.
Exception raises:
KeyError -- Unknown match field is defined in dict
"""
fields = [ofproto.oxm_from_jsondict(f) for f
in dict_['oxm_fields']]
o = OFPMatch(_ordered_fields=fields)
# XXX old api compat
# serialize and parse to fill OFPMatch.fields
buf = bytearray()
o.serialize(buf, 0)
return OFPMatch.parser(six.binary_type(buf), 0)
def __str__(self):
# XXX old api compat
if self._composed_with_old_api():
# copy object first because serialize_old is destructive
o2 = OFPMatch()
o2.fields = self.fields[:]
# serialize and parse to fill OFPMatch._fields2
buf = bytearray()
o2.serialize(buf, 0)
o = OFPMatch.parser(six.binary_type(buf), 0)
else:
o = self
return super(OFPMatch, o).__str__()
__repr__ = __str__
def append_field(self, header, value, mask=None):
"""
Append a match field.
========= =======================================================
Argument Description
========= =======================================================
header match field header ID which is defined automatically in
``ofproto_v1_3``
value match field value
mask mask value to the match field
========= =======================================================
The available ``header`` is as follows.
====================== ===================================
Header ID Description
====================== ===================================
OXM_OF_IN_PORT Switch input port
OXM_OF_IN_PHY_PORT Switch physical input port
OXM_OF_METADATA Metadata passed between tables
OXM_OF_ETH_DST Ethernet destination address
OXM_OF_ETH_SRC Ethernet source address
OXM_OF_ETH_TYPE Ethernet frame type
OXM_OF_VLAN_VID VLAN id
OXM_OF_VLAN_PCP VLAN priority
OXM_OF_IP_DSCP IP DSCP (6 bits in ToS field)
OXM_OF_IP_ECN IP ECN (2 bits in ToS field)
OXM_OF_IP_PROTO IP protocol
OXM_OF_IPV4_SRC IPv4 source address
OXM_OF_IPV4_DST IPv4 destination address
OXM_OF_TCP_SRC TCP source port
OXM_OF_TCP_DST TCP destination port
OXM_OF_UDP_SRC UDP source port
OXM_OF_UDP_DST UDP destination port
OXM_OF_SCTP_SRC SCTP source port
OXM_OF_SCTP_DST SCTP destination port
OXM_OF_ICMPV4_TYPE ICMP type
OXM_OF_ICMPV4_CODE ICMP code
OXM_OF_ARP_OP ARP opcode
OXM_OF_ARP_SPA ARP source IPv4 address
OXM_OF_ARP_TPA ARP target IPv4 address
OXM_OF_ARP_SHA ARP source hardware address
OXM_OF_ARP_THA ARP target hardware address
OXM_OF_IPV6_SRC IPv6 source address
OXM_OF_IPV6_DST IPv6 destination address
OXM_OF_IPV6_FLABEL IPv6 Flow Label
OXM_OF_ICMPV6_TYPE ICMPv6 type
OXM_OF_ICMPV6_CODE ICMPv6 code
OXM_OF_IPV6_ND_TARGET Target address for ND
OXM_OF_IPV6_ND_SLL Source link-layer for ND
OXM_OF_IPV6_ND_TLL Target link-layer for ND
OXM_OF_MPLS_LABEL MPLS label
OXM_OF_MPLS_TC MPLS TC
====================== ===================================
"""
self.fields.append(OFPMatchField.make(header, value, mask))
def _composed_with_old_api(self):
return (self.fields and not self._fields2) or \
self._wc.__dict__ != FlowWildcards().__dict__
def serialize(self, buf, offset):
"""
Outputs the expression of the wire protocol of the flow match into
the buf.
Returns the output length.
"""
# XXX compat
if self._composed_with_old_api():
return self.serialize_old(buf, offset)
fields = [ofproto.oxm_from_user(k, uv) for (k, uv)
in self._fields2]
hdr_pack_str = '!HH'
field_offset = offset + struct.calcsize(hdr_pack_str)
for (n, value, mask) in fields:
field_offset += ofproto.oxm_serialize(n, value, mask, buf,
field_offset)
length = field_offset - offset
msg_pack_into(hdr_pack_str, buf, offset,
ofproto.OFPMT_OXM, length)
self.length = length
pad_len = utils.round_up(length, 8) - length
msg_pack_into("%dx" % pad_len, buf, field_offset)
return length + pad_len
def serialize_old(self, buf, offset):
if hasattr(self, '_serialized'):
raise Exception('serializing an OFPMatch composed with '
'old API multiple times is not supported')
self._serialized = True
if self._wc.ft_test(ofproto.OFPXMT_OFB_IN_PORT):
self.append_field(ofproto.OXM_OF_IN_PORT,
self._flow.in_port)
if self._wc.ft_test(ofproto.OFPXMT_OFB_IN_PHY_PORT):
self.append_field(ofproto.OXM_OF_IN_PHY_PORT,
self._flow.in_phy_port)
if self._wc.ft_test(ofproto.OFPXMT_OFB_METADATA):
if self._wc.metadata_mask == UINT64_MAX:
header = ofproto.OXM_OF_METADATA
else:
header = ofproto.OXM_OF_METADATA_W
self.append_field(header, self._flow.metadata,
self._wc.metadata_mask)
if self._wc.ft_test(ofproto.OFPXMT_OFB_ETH_DST):
if self._wc.dl_dst_mask:
header = ofproto.OXM_OF_ETH_DST_W
else:
header = ofproto.OXM_OF_ETH_DST
self.append_field(header, self._flow.dl_dst, self._wc.dl_dst_mask)
if self._wc.ft_test(ofproto.OFPXMT_OFB_ETH_SRC):
if self._wc.dl_src_mask:
header = ofproto.OXM_OF_ETH_SRC_W
else:
header = ofproto.OXM_OF_ETH_SRC
self.append_field(header, self._flow.dl_src, self._wc.dl_src_mask)
if self._wc.ft_test(ofproto.OFPXMT_OFB_ETH_TYPE):
self.append_field(ofproto.OXM_OF_ETH_TYPE, self._flow.dl_type)
if self._wc.ft_test(ofproto.OFPXMT_OFB_VLAN_VID):
if self._wc.vlan_vid_mask == UINT16_MAX:
header = ofproto.OXM_OF_VLAN_VID
else:
header = ofproto.OXM_OF_VLAN_VID_W
self.append_field(header, self._flow.vlan_vid,
self._wc.vlan_vid_mask)
if self._wc.ft_test(ofproto.OFPXMT_OFB_VLAN_PCP):
self.append_field(ofproto.OXM_OF_VLAN_PCP,
self._flow.vlan_pcp)
if self._wc.ft_test(ofproto.OFPXMT_OFB_IP_DSCP):
self.append_field(ofproto.OXM_OF_IP_DSCP, self._flow.ip_dscp)
if self._wc.ft_test(ofproto.OFPXMT_OFB_IP_ECN):
self.append_field(ofproto.OXM_OF_IP_ECN, self._flow.ip_ecn)
if self._wc.ft_test(ofproto.OFPXMT_OFB_IP_PROTO):
self.append_field(ofproto.OXM_OF_IP_PROTO,
self._flow.ip_proto)
if self._wc.ft_test(ofproto.OFPXMT_OFB_IPV4_SRC):
if self._wc.ipv4_src_mask == UINT32_MAX:
header = ofproto.OXM_OF_IPV4_SRC
else:
header = ofproto.OXM_OF_IPV4_SRC_W
self.append_field(header, self._flow.ipv4_src,
self._wc.ipv4_src_mask)
if self._wc.ft_test(ofproto.OFPXMT_OFB_IPV4_DST):
if self._wc.ipv4_dst_mask == UINT32_MAX:
header = ofproto.OXM_OF_IPV4_DST
else:
header = ofproto.OXM_OF_IPV4_DST_W
self.append_field(header, self._flow.ipv4_dst,
self._wc.ipv4_dst_mask)
if self._wc.ft_test(ofproto.OFPXMT_OFB_TCP_SRC):
self.append_field(ofproto.OXM_OF_TCP_SRC, self._flow.tcp_src)
if self._wc.ft_test(ofproto.OFPXMT_OFB_TCP_DST):
self.append_field(ofproto.OXM_OF_TCP_DST, self._flow.tcp_dst)
if self._wc.ft_test(ofproto.OFPXMT_OFB_UDP_SRC):
self.append_field(ofproto.OXM_OF_UDP_SRC, self._flow.udp_src)
if self._wc.ft_test(ofproto.OFPXMT_OFB_UDP_DST):
self.append_field(ofproto.OXM_OF_UDP_DST, self._flow.udp_dst)
if self._wc.ft_test(ofproto.OFPXMT_OFB_SCTP_SRC):
self.append_field(ofproto.OXM_OF_SCTP_SRC,
self._flow.sctp_src)
if self._wc.ft_test(ofproto.OFPXMT_OFB_SCTP_DST):
self.append_field(ofproto.OXM_OF_SCTP_DST,
self._flow.sctp_dst)
if self._wc.ft_test(ofproto.OFPXMT_OFB_ICMPV4_TYPE):
self.append_field(ofproto.OXM_OF_ICMPV4_TYPE,
self._flow.icmpv4_type)
if self._wc.ft_test(ofproto.OFPXMT_OFB_ICMPV4_CODE):
self.append_field(ofproto.OXM_OF_ICMPV4_CODE,
self._flow.icmpv4_code)
if self._wc.ft_test(ofproto.OFPXMT_OFB_ARP_OP):
self.append_field(ofproto.OXM_OF_ARP_OP, self._flow.arp_op)
if self._wc.ft_test(ofproto.OFPXMT_OFB_ARP_SPA):
if self._wc.arp_spa_mask == UINT32_MAX:
header = ofproto.OXM_OF_ARP_SPA
else:
header = ofproto.OXM_OF_ARP_SPA_W
self.append_field(header, self._flow.arp_spa,
self._wc.arp_spa_mask)
if self._wc.ft_test(ofproto.OFPXMT_OFB_ARP_TPA):
if self._wc.arp_tpa_mask == UINT32_MAX:
header = ofproto.OXM_OF_ARP_TPA
else:
header = ofproto.OXM_OF_ARP_TPA_W
self.append_field(header, self._flow.arp_tpa,
self._wc.arp_tpa_mask)
if self._wc.ft_test(ofproto.OFPXMT_OFB_ARP_SHA):
if self._wc.arp_sha_mask:
header = ofproto.OXM_OF_ARP_SHA_W
else:
header = ofproto.OXM_OF_ARP_SHA
self.append_field(header, self._flow.arp_sha,
self._wc.arp_sha_mask)
if self._wc.ft_test(ofproto.OFPXMT_OFB_ARP_THA):
if self._wc.arp_tha_mask:
header = ofproto.OXM_OF_ARP_THA_W
else:
header = ofproto.OXM_OF_ARP_THA
self.append_field(header, self._flow.arp_tha,
self._wc.arp_tha_mask)
if self._wc.ft_test(ofproto.OFPXMT_OFB_IPV6_SRC):
if len(self._wc.ipv6_src_mask):
header = ofproto.OXM_OF_IPV6_SRC_W
else:
header = ofproto.OXM_OF_IPV6_SRC
self.append_field(header, self._flow.ipv6_src,
self._wc.ipv6_src_mask)
if self._wc.ft_test(ofproto.OFPXMT_OFB_IPV6_DST):
if len(self._wc.ipv6_dst_mask):
header = ofproto.OXM_OF_IPV6_DST_W
else:
header = ofproto.OXM_OF_IPV6_DST
self.append_field(header, self._flow.ipv6_dst,
self._wc.ipv6_dst_mask)
if self._wc.ft_test(ofproto.OFPXMT_OFB_IPV6_FLABEL):
if self._wc.ipv6_flabel_mask == UINT32_MAX:
header = ofproto.OXM_OF_IPV6_FLABEL
else:
header = ofproto.OXM_OF_IPV6_FLABEL_W
self.append_field(header, self._flow.ipv6_flabel,
self._wc.ipv6_flabel_mask)
if self._wc.ft_test(ofproto.OFPXMT_OFB_ICMPV6_TYPE):
self.append_field(ofproto.OXM_OF_ICMPV6_TYPE,
self._flow.icmpv6_type)
if self._wc.ft_test(ofproto.OFPXMT_OFB_ICMPV6_CODE):
self.append_field(ofproto.OXM_OF_ICMPV6_CODE,
self._flow.icmpv6_code)
if self._wc.ft_test(ofproto.OFPXMT_OFB_IPV6_ND_TARGET):
self.append_field(ofproto.OXM_OF_IPV6_ND_TARGET,
self._flow.ipv6_nd_target)
if self._wc.ft_test(ofproto.OFPXMT_OFB_IPV6_ND_SLL):
self.append_field(ofproto.OXM_OF_IPV6_ND_SLL,
self._flow.ipv6_nd_sll)
if self._wc.ft_test(ofproto.OFPXMT_OFB_IPV6_ND_TLL):
self.append_field(ofproto.OXM_OF_IPV6_ND_TLL,
self._flow.ipv6_nd_tll)
if self._wc.ft_test(ofproto.OFPXMT_OFB_MPLS_LABEL):
self.append_field(ofproto.OXM_OF_MPLS_LABEL,
self._flow.mpls_label)
if self._wc.ft_test(ofproto.OFPXMT_OFB_MPLS_TC):
self.append_field(ofproto.OXM_OF_MPLS_TC,
self._flow.mpls_tc)
field_offset = offset + 4
for f in self.fields:
f.serialize(buf, field_offset)
field_offset += f.length
length = field_offset - offset
msg_pack_into('!HH', buf, offset, ofproto.OFPMT_OXM, length)
pad_len = utils.round_up(length, 8) - length
msg_pack_into("%dx" % pad_len, buf, field_offset)
return length + pad_len
@classmethod
def parser(cls, buf, offset):
"""
Returns an object which is generated from a buffer including the
expression of the wire protocol of the flow match.
"""
match = OFPMatch()
type_, length = struct.unpack_from('!HH', buf, offset)
match.type = type_
match.length = length
# ofp_match adjustment
offset += 4
length -= 4
# XXXcompat
cls.parser_old(match, buf, offset, length)
fields = []
while length > 0:
n, value, mask, field_len = ofproto.oxm_parse(buf, offset)
k, uv = ofproto.oxm_to_user(n, value, mask)
fields.append((k, uv))
offset += field_len
length -= field_len
match._fields2 = fields
return match
@staticmethod
def parser_old(match, buf, offset, length):
while length > 0:
field = OFPMatchField.parser(buf, offset)
offset += field.length
length -= field.length
match.fields.append(field)
def set_in_port(self, port):
self._wc.ft_set(ofproto.OFPXMT_OFB_IN_PORT)
self._flow.in_port = port
def set_in_phy_port(self, phy_port):
self._wc.ft_set(ofproto.OFPXMT_OFB_IN_PHY_PORT)
self._flow.in_phy_port = phy_port
def set_metadata(self, metadata):
self.set_metadata_masked(metadata, UINT64_MAX)
def set_metadata_masked(self, metadata, mask):
self._wc.ft_set(ofproto.OFPXMT_OFB_METADATA)
self._wc.metadata_mask = mask
self._flow.metadata = metadata & mask
def set_dl_dst(self, dl_dst):
self._wc.ft_set(ofproto.OFPXMT_OFB_ETH_DST)
self._flow.dl_dst = dl_dst
def set_dl_dst_masked(self, dl_dst, mask):
self._wc.ft_set(ofproto.OFPXMT_OFB_ETH_DST)
self._wc.dl_dst_mask = mask
# bit-wise and of the corresponding elements of dl_dst and mask
self._flow.dl_dst = mac.haddr_bitand(dl_dst, mask)
def set_dl_src(self, dl_src):
self._wc.ft_set(ofproto.OFPXMT_OFB_ETH_SRC)
self._flow.dl_src = dl_src
def set_dl_src_masked(self, dl_src, mask):
self._wc.ft_set(ofproto.OFPXMT_OFB_ETH_SRC)
self._wc.dl_src_mask = mask
self._flow.dl_src = mac.haddr_bitand(dl_src, mask)
def set_dl_type(self, dl_type):
self._wc.ft_set(ofproto.OFPXMT_OFB_ETH_TYPE)
self._flow.dl_type = dl_type
def set_vlan_vid_none(self):
self._wc.ft_set(ofproto.OFPXMT_OFB_VLAN_VID)
self._wc.vlan_vid_mask = UINT16_MAX
self._flow.vlan_vid = ofproto.OFPVID_NONE
def set_vlan_vid(self, vid):
self.set_vlan_vid_masked(vid, UINT16_MAX)
def set_vlan_vid_masked(self, vid, mask):
vid |= ofproto.OFPVID_PRESENT
self._wc.ft_set(ofproto.OFPXMT_OFB_VLAN_VID)
self._wc.vlan_vid_mask = mask
self._flow.vlan_vid = vid
def set_vlan_pcp(self, pcp):
self._wc.ft_set(ofproto.OFPXMT_OFB_VLAN_PCP)
self._flow.vlan_pcp = pcp
def set_ip_dscp(self, ip_dscp):
self._wc.ft_set(ofproto.OFPXMT_OFB_IP_DSCP)
self._flow.ip_dscp = ip_dscp
def set_ip_ecn(self, ip_ecn):
self._wc.ft_set(ofproto.OFPXMT_OFB_IP_ECN)
self._flow.ip_ecn = ip_ecn
def set_ip_proto(self, ip_proto):
self._wc.ft_set(ofproto.OFPXMT_OFB_IP_PROTO)
self._flow.ip_proto = ip_proto
def set_ipv4_src(self, ipv4_src):
self.set_ipv4_src_masked(ipv4_src, UINT32_MAX)
def set_ipv4_src_masked(self, ipv4_src, mask):
self._wc.ft_set(ofproto.OFPXMT_OFB_IPV4_SRC)
self._flow.ipv4_src = ipv4_src
self._wc.ipv4_src_mask = mask
def set_ipv4_dst(self, ipv4_dst):
self.set_ipv4_dst_masked(ipv4_dst, UINT32_MAX)
def set_ipv4_dst_masked(self, ipv4_dst, mask):
self._wc.ft_set(ofproto.OFPXMT_OFB_IPV4_DST)
self._flow.ipv4_dst = ipv4_dst
self._wc.ipv4_dst_mask = mask
def set_tcp_src(self, tcp_src):
self._wc.ft_set(ofproto.OFPXMT_OFB_TCP_SRC)
self._flow.tcp_src = tcp_src
def set_tcp_dst(self, tcp_dst):
self._wc.ft_set(ofproto.OFPXMT_OFB_TCP_DST)
self._flow.tcp_dst = tcp_dst
def set_udp_src(self, udp_src):
self._wc.ft_set(ofproto.OFPXMT_OFB_UDP_SRC)
self._flow.udp_src = udp_src
def set_udp_dst(self, udp_dst):
self._wc.ft_set(ofproto.OFPXMT_OFB_UDP_DST)
self._flow.udp_dst = udp_dst
def set_sctp_src(self, sctp_src):
self._wc.ft_set(ofproto.OFPXMT_OFB_SCTP_SRC)
self._flow.sctp_src = sctp_src
def set_sctp_dst(self, sctp_dst):
self._wc.ft_set(ofproto.OFPXMT_OFB_SCTP_DST)
self._flow.sctp_dst = sctp_dst
def set_icmpv4_type(self, icmpv4_type):
self._wc.ft_set(ofproto.OFPXMT_OFB_ICMPV4_TYPE)
self._flow.icmpv4_type = icmpv4_type
def set_icmpv4_code(self, icmpv4_code):
self._wc.ft_set(ofproto.OFPXMT_OFB_ICMPV4_CODE)
self._flow.icmpv4_code = icmpv4_code
def set_arp_opcode(self, arp_op):
self._wc.ft_set(ofproto.OFPXMT_OFB_ARP_OP)
self._flow.arp_op = arp_op
def set_arp_spa(self, arp_spa):
self.set_arp_spa_masked(arp_spa, UINT32_MAX)
def set_arp_spa_masked(self, arp_spa, mask):
self._wc.ft_set(ofproto.OFPXMT_OFB_ARP_SPA)
self._wc.arp_spa_mask = mask
self._flow.arp_spa = arp_spa
def set_arp_tpa(self, arp_tpa):
self.set_arp_tpa_masked(arp_tpa, UINT32_MAX)
def set_arp_tpa_masked(self, arp_tpa, mask):
self._wc.ft_set(ofproto.OFPXMT_OFB_ARP_TPA)
self._wc.arp_tpa_mask = mask
self._flow.arp_tpa = arp_tpa
def set_arp_sha(self, arp_sha):
self._wc.ft_set(ofproto.OFPXMT_OFB_ARP_SHA)
self._flow.arp_sha = arp_sha
def set_arp_sha_masked(self, arp_sha, mask):
self._wc.ft_set(ofproto.OFPXMT_OFB_ARP_SHA)
self._wc.arp_sha_mask = mask
self._flow.arp_sha = mac.haddr_bitand(arp_sha, mask)
def set_arp_tha(self, arp_tha):
self._wc.ft_set(ofproto.OFPXMT_OFB_ARP_THA)
self._flow.arp_tha = arp_tha
def set_arp_tha_masked(self, arp_tha, mask):
self._wc.ft_set(ofproto.OFPXMT_OFB_ARP_THA)
self._wc.arp_tha_mask = mask
self._flow.arp_tha = mac.haddr_bitand(arp_tha, mask)
def set_ipv6_src(self, src):
self._wc.ft_set(ofproto.OFPXMT_OFB_IPV6_SRC)
self._flow.ipv6_src = src
def set_ipv6_src_masked(self, src, mask):
self._wc.ft_set(ofproto.OFPXMT_OFB_IPV6_SRC)
self._wc.ipv6_src_mask = mask
self._flow.ipv6_src = [x & y for (x, y) in zip(src, mask)]
def set_ipv6_dst(self, dst):
self._wc.ft_set(ofproto.OFPXMT_OFB_IPV6_DST)
self._flow.ipv6_dst = dst
def set_ipv6_dst_masked(self, dst, mask):
self._wc.ft_set(ofproto.OFPXMT_OFB_IPV6_DST)
self._wc.ipv6_dst_mask = mask
self._flow.ipv6_dst = [x & y for (x, y) in zip(dst, mask)]
def set_ipv6_flabel(self, flabel):
self.set_ipv6_flabel_masked(flabel, UINT32_MAX)
def set_ipv6_flabel_masked(self, flabel, mask):
self._wc.ft_set(ofproto.OFPXMT_OFB_IPV6_FLABEL)
self._wc.ipv6_flabel_mask = mask
self._flow.ipv6_flabel = flabel
def set_icmpv6_type(self, icmpv6_type):
self._wc.ft_set(ofproto.OFPXMT_OFB_ICMPV6_TYPE)
self._flow.icmpv6_type = icmpv6_type
def set_icmpv6_code(self, icmpv6_code):
self._wc.ft_set(ofproto.OFPXMT_OFB_ICMPV6_CODE)
self._flow.icmpv6_code = icmpv6_code
def set_ipv6_nd_target(self, target):
self._wc.ft_set(ofproto.OFPXMT_OFB_IPV6_ND_TARGET)
self._flow.ipv6_nd_target = target
def set_ipv6_nd_sll(self, ipv6_nd_sll):
self._wc.ft_set(ofproto.OFPXMT_OFB_IPV6_ND_SLL)
self._flow.ipv6_nd_sll = ipv6_nd_sll
def set_ipv6_nd_tll(self, ipv6_nd_tll):
self._wc.ft_set(ofproto.OFPXMT_OFB_IPV6_ND_TLL)
self._flow.ipv6_nd_tll = ipv6_nd_tll
def set_mpls_label(self, mpls_label):
self._wc.ft_set(ofproto.OFPXMT_OFB_MPLS_LABEL)
self._flow.mpls_label = mpls_label
def set_mpls_tc(self, mpls_tc):
self._wc.ft_set(ofproto.OFPXMT_OFB_MPLS_TC)
self._flow.mpls_tc = mpls_tc
class OFPMatchField(StringifyMixin):
_FIELDS_HEADERS = {}
@staticmethod
def register_field_header(headers):
def _register_field_header(cls):
for header in headers:
OFPMatchField._FIELDS_HEADERS[header] = cls
return cls
return _register_field_header
def __init__(self, header):
self.header = header
self.n_bytes = ofproto.oxm_tlv_header_extract_length(header)
self.length = 0
@classmethod
def cls_to_header(cls, cls_, hasmask):
# XXX efficiency
inv = dict((v, k) for k, v in cls._FIELDS_HEADERS.items()
if (((k >> 8) & 1) != 0) == hasmask)
return inv[cls_]
@staticmethod
def make(header, value, mask=None):
cls_ = OFPMatchField._FIELDS_HEADERS.get(header)
return cls_(header, value, mask)
@classmethod
def parser(cls, buf, offset):
(header,) = struct.unpack_from('!I', buf, offset)
cls_ = OFPMatchField._FIELDS_HEADERS.get(header)
if cls_:
field = cls_.field_parser(header, buf, offset)
else:
field = OFPMatchField(header)
field.length = (header & 0xff) + 4
return field
@classmethod
def field_parser(cls, header, buf, offset):
mask = None
if ofproto.oxm_tlv_header_extract_hasmask(header):
pack_str = '!' + cls.pack_str[1:] * 2
(value, mask) = struct.unpack_from(pack_str, buf, offset + 4)
else:
(value,) = struct.unpack_from(cls.pack_str, buf, offset + 4)
return cls(header, value, mask)
def serialize(self, buf, offset):
if ofproto.oxm_tlv_header_extract_hasmask(self.header):
self.put_w(buf, offset, self.value, self.mask)
else:
self.put(buf, offset, self.value)
def _put_header(self, buf, offset):
msg_pack_into('!I', buf, offset, self.header)
self.length = 4
def _put(self, buf, offset, value):
msg_pack_into(self.pack_str, buf, offset, value)
self.length += self.n_bytes
def put_w(self, buf, offset, value, mask):
self._put_header(buf, offset)
self._put(buf, offset + self.length, value)
self._put(buf, offset + self.length, mask)
def put(self, buf, offset, value):
self._put_header(buf, offset)
self._put(buf, offset + self.length, value)
def _putv6(self, buf, offset, value):
msg_pack_into(self.pack_str, buf, offset, *value)
self.length += self.n_bytes
def putv6(self, buf, offset, value, mask=None):
self._put_header(buf, offset)
self._putv6(buf, offset + self.length, value)
if mask and len(mask):
self._putv6(buf, offset + self.length, mask)
def oxm_len(self):
return self.header & 0xff
def to_jsondict(self):
# remove some redundant attributes
d = super(OFPMatchField, self).to_jsondict()
v = d[self.__class__.__name__]
del v['header']
del v['length']
del v['n_bytes']
return d
@classmethod
def from_jsondict(cls, dict_):
# just pass the dict around.
# it will be converted by OFPMatch.__init__().
return {cls.__name__: dict_}
def stringify_attrs(self):
f = super(OFPMatchField, self).stringify_attrs
if not ofproto.oxm_tlv_header_extract_hasmask(self.header):
# something like the following, but yield two values (k,v)
# return itertools.ifilter(lambda k, v: k != 'mask', iter())
def g():
for k, v in f():
if k != 'mask':
yield (k, v)
return g()
else:
return f()
@OFPMatchField.register_field_header([ofproto.OXM_OF_IN_PORT])
class MTInPort(OFPMatchField):
pack_str = '!I'
def __init__(self, header, value, mask=None):
super(MTInPort, self).__init__(header)
self.value = value
@OFPMatchField.register_field_header([ofproto.OXM_OF_METADATA,
ofproto.OXM_OF_METADATA_W])
class MTMetadata(OFPMatchField):
pack_str = '!Q'
def __init__(self, header, value, mask=None):
super(MTMetadata, self).__init__(header)
self.value = value
self.mask = mask
@OFPMatchField.register_field_header([ofproto.OXM_OF_IN_PHY_PORT])
class MTInPhyPort(OFPMatchField):
pack_str = '!I'
def __init__(self, header, value, mask=None):
super(MTInPhyPort, self).__init__(header)
self.value = value
@OFPMatchField.register_field_header([ofproto.OXM_OF_ETH_DST,
ofproto.OXM_OF_ETH_DST_W])
class MTEthDst(OFPMatchField):
pack_str = '!6s'
def __init__(self, header, value, mask=None):
super(MTEthDst, self).__init__(header)
self.value = value
self.mask = mask
@OFPMatchField.register_field_header([ofproto.OXM_OF_ETH_SRC,
ofproto.OXM_OF_ETH_SRC_W])
class MTEthSrc(OFPMatchField):
pack_str = '!6s'
def __init__(self, header, value, mask=None):
super(MTEthSrc, self).__init__(header)
self.value = value
self.mask = mask
@OFPMatchField.register_field_header([ofproto.OXM_OF_ETH_TYPE])
class MTEthType(OFPMatchField):
pack_str = '!H'
def __init__(self, header, value, mask=None):
super(MTEthType, self).__init__(header)
self.value = value
@OFPMatchField.register_field_header([ofproto.OXM_OF_VLAN_VID,
ofproto.OXM_OF_VLAN_VID_W])
class MTVlanVid(OFPMatchField):
pack_str = '!H'
def __init__(self, header, value, mask=None):
super(MTVlanVid, self).__init__(header)
self.value = value
self.mask = mask
@classmethod
def field_parser(cls, header, buf, offset):
m = super(MTVlanVid, cls).field_parser(header, buf, offset)
m.value &= ~ofproto.OFPVID_PRESENT
return m
@OFPMatchField.register_field_header([ofproto.OXM_OF_VLAN_PCP])
class MTVlanPcp(OFPMatchField):
pack_str = '!B'
def __init__(self, header, value, mask=None):
super(MTVlanPcp, self).__init__(header)
self.value = value
@OFPMatchField.register_field_header([ofproto.OXM_OF_IP_DSCP])
class MTIPDscp(OFPMatchField):
pack_str = '!B'
def __init__(self, header, value, mask=None):
super(MTIPDscp, self).__init__(header)
self.value = value
@OFPMatchField.register_field_header([ofproto.OXM_OF_IP_ECN])
class MTIPECN(OFPMatchField):
pack_str = '!B'
def __init__(self, header, value, mask=None):
super(MTIPECN, self).__init__(header)
self.value = value
@OFPMatchField.register_field_header([ofproto.OXM_OF_IP_PROTO])
class MTIPProto(OFPMatchField):
pack_str = '!B'
def __init__(self, header, value, mask=None):
super(MTIPProto, self).__init__(header)
self.value = value
@OFPMatchField.register_field_header([ofproto.OXM_OF_IPV4_SRC,
ofproto.OXM_OF_IPV4_SRC_W])
class MTIPV4Src(OFPMatchField):
pack_str = '!I'
def __init__(self, header, value, mask=None):
super(MTIPV4Src, self).__init__(header)
self.value = value
self.mask = mask
@OFPMatchField.register_field_header([ofproto.OXM_OF_IPV4_DST,
ofproto.OXM_OF_IPV4_DST_W])
class MTIPV4Dst(OFPMatchField):
pack_str = '!I'
def __init__(self, header, value, mask=None):
super(MTIPV4Dst, self).__init__(header)
self.value = value
self.mask = mask
@OFPMatchField.register_field_header([ofproto.OXM_OF_TCP_SRC])
class MTTCPSrc(OFPMatchField):
pack_str = '!H'
def __init__(self, header, value, mask=None):
super(MTTCPSrc, self).__init__(header)
self.value = value
@OFPMatchField.register_field_header([ofproto.OXM_OF_TCP_DST])
class MTTCPDst(OFPMatchField):
pack_str = '!H'
def __init__(self, header, value, mask=None):
super(MTTCPDst, self).__init__(header)
self.value = value
@OFPMatchField.register_field_header([ofproto.OXM_OF_UDP_SRC])
class MTUDPSrc(OFPMatchField):
pack_str = '!H'
def __init__(self, header, value, mask=None):
super(MTUDPSrc, self).__init__(header)
self.value = value
@OFPMatchField.register_field_header([ofproto.OXM_OF_UDP_DST])
class MTUDPDst(OFPMatchField):
pack_str = '!H'
def __init__(self, header, value, mask=None):
super(MTUDPDst, self).__init__(header)
self.value = value
@OFPMatchField.register_field_header([ofproto.OXM_OF_SCTP_SRC])
class MTSCTPSrc(OFPMatchField):
pack_str = '!H'
def __init__(self, header, value, mask=None):
super(MTSCTPSrc, self).__init__(header)
self.value = value
@OFPMatchField.register_field_header([ofproto.OXM_OF_SCTP_DST])
class MTSCTPDst(OFPMatchField):
pack_str = '!H'
def __init__(self, header, value, mask=None):
super(MTSCTPDst, self).__init__(header)
self.value = value
@OFPMatchField.register_field_header([ofproto.OXM_OF_ICMPV4_TYPE])
class MTICMPV4Type(OFPMatchField):
pack_str = '!B'
def __init__(self, header, value, mask=None):
super(MTICMPV4Type, self).__init__(header)
self.value = value
@OFPMatchField.register_field_header([ofproto.OXM_OF_ICMPV4_CODE])
class MTICMPV4Code(OFPMatchField):
pack_str = '!B'
def __init__(self, header, value, mask=None):
super(MTICMPV4Code, self).__init__(header)
self.value = value
@OFPMatchField.register_field_header([ofproto.OXM_OF_ARP_OP])
class MTArpOp(OFPMatchField):
pack_str = '!H'
def __init__(self, header, value, mask=None):
super(MTArpOp, self).__init__(header)
self.value = value
@OFPMatchField.register_field_header([ofproto.OXM_OF_ARP_SPA,
ofproto.OXM_OF_ARP_SPA_W])
class MTArpSpa(OFPMatchField):
pack_str = '!I'
def __init__(self, header, value, mask=None):
super(MTArpSpa, self).__init__(header)
self.value = value
self.mask = mask
@OFPMatchField.register_field_header([ofproto.OXM_OF_ARP_TPA,
ofproto.OXM_OF_ARP_TPA_W])
class MTArpTpa(OFPMatchField):
pack_str = '!I'
def __init__(self, header, value, mask=None):
super(MTArpTpa, self).__init__(header)
self.value = value
self.mask = mask
@OFPMatchField.register_field_header([ofproto.OXM_OF_ARP_SHA,
ofproto.OXM_OF_ARP_SHA_W])
class MTArpSha(OFPMatchField):
pack_str = '!6s'
def __init__(self, header, value, mask=None):
super(MTArpSha, self).__init__(header)
self.value = value
self.mask = mask
@OFPMatchField.register_field_header([ofproto.OXM_OF_ARP_THA,
ofproto.OXM_OF_ARP_THA_W])
class MTArpTha(OFPMatchField):
pack_str = '!6s'
def __init__(self, header, value, mask=None):
super(MTArpTha, self).__init__(header)
self.value = value
self.mask = mask
class MTIPv6(object):
@classmethod
def field_parser(cls, header, buf, offset):
if ofproto.oxm_tlv_header_extract_hasmask(header):
pack_str = '!' + cls.pack_str[1:] * 2
value = struct.unpack_from(pack_str, buf, offset + 4)
return cls(header, list(value[:8]), list(value[8:]))
else:
value = struct.unpack_from(cls.pack_str, buf, offset + 4)
return cls(header, list(value))
def serialize(self, buf, offset):
self.putv6(buf, offset, self.value, self.mask)
@OFPMatchField.register_field_header([ofproto.OXM_OF_IPV6_SRC,
ofproto.OXM_OF_IPV6_SRC_W])
class MTIPv6Src(MTIPv6, OFPMatchField):
pack_str = '!8H'
def __init__(self, header, value, mask=None):
super(MTIPv6Src, self).__init__(header)
self.value = value
self.mask = mask
@OFPMatchField.register_field_header([ofproto.OXM_OF_IPV6_DST,
ofproto.OXM_OF_IPV6_DST_W])
class MTIPv6Dst(MTIPv6, OFPMatchField):
pack_str = '!8H'
def __init__(self, header, value, mask=None):
super(MTIPv6Dst, self).__init__(header)
self.value = value
self.mask = mask
@OFPMatchField.register_field_header([ofproto.OXM_OF_IPV6_FLABEL,
ofproto.OXM_OF_IPV6_FLABEL_W])
class MTIPv6Flabel(OFPMatchField):
pack_str = '!I'
def __init__(self, header, value, mask=None):
super(MTIPv6Flabel, self).__init__(header)
self.value = value
self.mask = mask
@OFPMatchField.register_field_header([ofproto.OXM_OF_MPLS_LABEL])
class MTMplsLabel(OFPMatchField):
pack_str = '!I'
def __init__(self, header, value, mask=None):
super(MTMplsLabel, self).__init__(header)
self.value = value
@OFPMatchField.register_field_header([ofproto.OXM_OF_ICMPV6_TYPE])
class MTICMPV6Type(OFPMatchField):
pack_str = '!B'
def __init__(self, header, value, mask=None):
super(MTICMPV6Type, self).__init__(header)
self.value = value
@OFPMatchField.register_field_header([ofproto.OXM_OF_ICMPV6_CODE])
class MTICMPV6Code(OFPMatchField):
pack_str = '!B'
def __init__(self, header, value, mask=None):
super(MTICMPV6Code, self).__init__(header)
self.value = value
@OFPMatchField.register_field_header([ofproto.OXM_OF_IPV6_ND_TARGET])
class MTIPv6NdTarget(MTIPv6, OFPMatchField):
pack_str = '!8H'
def __init__(self, header, value, mask=None):
super(MTIPv6NdTarget, self).__init__(header)
self.value = value
def serialize(self, buf, offset):
self.putv6(buf, offset, self.value)
@OFPMatchField.register_field_header([ofproto.OXM_OF_IPV6_ND_SLL])
class MTIPv6NdSll(OFPMatchField):
pack_str = '!6s'
def __init__(self, header, value, mask=None):
super(MTIPv6NdSll, self).__init__(header)
self.value = value
@OFPMatchField.register_field_header([ofproto.OXM_OF_IPV6_ND_TLL])
class MTIPv6NdTll(OFPMatchField):
pack_str = '!6s'
def __init__(self, header, value, mask=None):
super(MTIPv6NdTll, self).__init__(header)
self.value = value
@OFPMatchField.register_field_header([ofproto.OXM_OF_MPLS_TC])
class MTMplsTc(OFPMatchField):
pack_str = '!B'
def __init__(self, header, value, mask=None):
super(MTMplsTc, self).__init__(header)
self.value = value
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