blob: c8e31c94fbf547be5f3b9439ed011b9418a6c663 [file] [log] [blame]
:: # Copyright 2013, Big Switch Networks, Inc.
:: #
:: # LoxiGen is licensed under the Eclipse Public License, version 1.0 (EPL), with
:: # the following special exception:
:: #
:: # LOXI Exception
:: #
:: # As a special exception to the terms of the EPL, you may distribute libraries
:: # generated by LoxiGen (LoxiGen Libraries) under the terms of your choice, provided
:: # that copyright and licensing notices generated by LoxiGen are not altered or removed
:: # from the LoxiGen Libraries and the notice provided below is (i) included in
:: # the LoxiGen Libraries, if distributed in source code form and (ii) included in any
:: # documentation for the LoxiGen Libraries, if distributed in binary form.
:: #
:: # Notice: "Copyright 2013, Big Switch Networks, Inc. This library was generated by the LoxiGen Compiler."
:: #
:: # You may not use this file except in compliance with the EPL or LOXI Exception. You may obtain
:: # a copy of the EPL at:
:: #
:: # http::: #www.eclipse.org/legal/epl-v10.html
:: #
:: # 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
:: # EPL for the specific language governing permissions and limitations
:: # under the EPL.
::
:: import itertools
:: import of_g
:: import py_gen.util as util
:: import py_gen.oftype
:: include('_copyright.py')
:: include('_autogen.py')
import struct
import loxi
import const
import common
import action # for unpack_list
:: if version >= 2:
import instruction # for unpack_list
:: #endif
:: if version >= 4:
import meter_band # for unpack_list
:: #endif
import util
import loxi.generic_util
class Message(object):
version = const.OFP_VERSION
type = None # override in subclass
xid = None
:: for ofclass in ofclasses:
:: from loxi_ir import *
:: normal_members = [m for m in ofclass.members if type(m) == OFDataMember]
:: type_members = [m for m in ofclass.members if type(m) == OFTypeMember]
class ${ofclass.pyname}(Message):
:: for m in type_members:
${m.name} = ${m.value}
:: #endfor
def __init__(self, ${', '.join(["%s=None" % m.name for m in normal_members])}):
self.xid = xid
:: for m in [x for x in normal_members if x.name != 'xid']:
if ${m.name} != None:
self.${m.name} = ${m.name}
else:
self.${m.name} = ${py_gen.oftype.gen_init_expr(m.oftype, version=version)}
:: #endfor
def pack(self):
packed = []
:: include('_pack.py', ofclass=ofclass, version=version)
return ''.join(packed)
@staticmethod
def unpack(buf):
if len(buf) < 8: raise loxi.ProtocolError("buffer too short to contain an OpenFlow message")
obj = ${ofclass.pyname}()
:: include('_unpack.py', ofclass=ofclass, version=version)
return obj
def __eq__(self, other):
if type(self) != type(other): return False
if self.version != other.version: return False
if self.type != other.type: return False
:: for m in normal_members:
if self.${m.name} != other.${m.name}: return False
:: #endfor
return True
def __ne__(self, other):
return not self.__eq__(other)
def __str__(self):
return self.show()
def show(self):
import loxi.pp
return loxi.pp.pp(self)
def pretty_print(self, q):
:: include('_pretty_print.py', ofclass=ofclass)
:: #endfor
def parse_header(buf):
if len(buf) < 8:
raise loxi.ProtocolError("too short to be an OpenFlow message")
return struct.unpack_from("!BBHL", buf)
def parse_message(buf):
msg_ver, msg_type, msg_len, msg_xid = parse_header(buf)
if msg_ver != const.OFP_VERSION and msg_type != const.OFPT_HELLO:
raise loxi.ProtocolError("wrong OpenFlow version (expected %d, got %d)" % (const.OFP_VERSION, msg_ver))
if len(buf) != msg_len:
raise loxi.ProtocolError("incorrect message size")
if msg_type in parsers:
return parsers[msg_type](buf)
else:
raise loxi.ProtocolError("unexpected message type")
def parse_error(buf):
if len(buf) < 8 + 2:
raise loxi.ProtocolError("message too short")
err_type, = struct.unpack_from("!H", buf, 8)
if err_type in error_msg_parsers:
return error_msg_parsers[err_type](buf)
else:
raise loxi.ProtocolError("unexpected error type %u" % err_type)
def parse_flow_mod(buf):
:: if version == 1:
:: offset = 57
:: elif version >= 2:
:: offset = 25
:: #endif
if len(buf) < ${offset} + 1:
raise loxi.ProtocolError("message too short")
# Technically uint16_t for OF 1.0
cmd, = struct.unpack_from("!B", buf, ${offset})
if cmd in flow_mod_parsers:
return flow_mod_parsers[cmd](buf)
else:
raise loxi.ProtocolError("unexpected flow mod cmd %u" % cmd)
def parse_stats_reply(buf):
if len(buf) < 8 + 2:
raise loxi.ProtocolError("message too short")
stats_type, = struct.unpack_from("!H", buf, 8)
if stats_type in stats_reply_parsers:
return stats_reply_parsers[stats_type](buf)
else:
raise loxi.ProtocolError("unexpected stats type %u" % stats_type)
def parse_stats_request(buf):
if len(buf) < 8 + 2:
raise loxi.ProtocolError("message too short")
stats_type, = struct.unpack_from("!H", buf, 8)
if stats_type in stats_request_parsers:
return stats_request_parsers[stats_type](buf)
else:
raise loxi.ProtocolError("unexpected stats type %u" % stats_type)
def parse_experimenter(buf):
if len(buf) < 16:
raise loxi.ProtocolError("experimenter message too short")
experimenter, = struct.unpack_from("!L", buf, 8)
if experimenter == 0x005c16c7: # Big Switch Networks
subtype, = struct.unpack_from("!L", buf, 12)
elif experimenter == 0x00002320: # Nicira
subtype, = struct.unpack_from("!L", buf, 12)
else:
raise loxi.ProtocolError("unexpected experimenter id %#x" % experimenter)
if subtype in experimenter_parsers[experimenter]:
return experimenter_parsers[experimenter][subtype](buf)
else:
raise loxi.ProtocolError("unexpected experimenter %#x subtype %#x" % (experimenter, subtype))
parsers = {
:: sort_key = lambda x: x.type_members[1].value
:: msgtype_groups = itertools.groupby(sorted(ofclasses, key=sort_key), sort_key)
:: for (k, v) in msgtype_groups:
:: k = util.constant_for_value(version, "ofp_type", k)
:: v = list(v)
:: if len(v) == 1:
${k} : ${v[0].pyname}.unpack,
:: else:
${k} : parse_${k[11:].lower()},
:: #endif
:: #endfor
}
error_msg_parsers = {
const.OFPET_HELLO_FAILED : hello_failed_error_msg.unpack,
const.OFPET_BAD_REQUEST : bad_request_error_msg.unpack,
const.OFPET_BAD_ACTION : bad_action_error_msg.unpack,
const.OFPET_FLOW_MOD_FAILED : flow_mod_failed_error_msg.unpack,
const.OFPET_PORT_MOD_FAILED : port_mod_failed_error_msg.unpack,
const.OFPET_QUEUE_OP_FAILED : queue_op_failed_error_msg.unpack,
:: if version >= of_g.VERSION_1_1:
const.OFPET_BAD_INSTRUCTION : bad_instruction_error_msg.unpack,
const.OFPET_BAD_MATCH : bad_match_error_msg.unpack,
const.OFPET_GROUP_MOD_FAILED : group_mod_failed_error_msg.unpack,
const.OFPET_TABLE_MOD_FAILED : table_mod_failed_error_msg.unpack,
const.OFPET_SWITCH_CONFIG_FAILED : switch_config_failed_error_msg.unpack,
:: #endif
:: if version >= of_g.VERSION_1_2:
const.OFPET_ROLE_REQUEST_FAILED : role_request_failed_error_msg.unpack,
const.OFPET_EXPERIMENTER : experimenter_error_msg.unpack,
:: #endif
:: if version >= of_g.VERSION_1_3:
const.OFPET_METER_MOD_FAILED : meter_mod_failed_error_msg.unpack,
const.OFPET_TABLE_FEATURES_FAILED : table_features_failed_error_msg.unpack,
:: #endif
}
flow_mod_parsers = {
const.OFPFC_ADD : flow_add.unpack,
const.OFPFC_MODIFY : flow_modify.unpack,
const.OFPFC_MODIFY_STRICT : flow_modify_strict.unpack,
const.OFPFC_DELETE : flow_delete.unpack,
const.OFPFC_DELETE_STRICT : flow_delete_strict.unpack,
}
stats_reply_parsers = {
const.OFPST_DESC : desc_stats_reply.unpack,
const.OFPST_FLOW : flow_stats_reply.unpack,
const.OFPST_AGGREGATE : aggregate_stats_reply.unpack,
const.OFPST_TABLE : table_stats_reply.unpack,
const.OFPST_PORT : port_stats_reply.unpack,
const.OFPST_QUEUE : queue_stats_reply.unpack,
:: if version >= of_g.VERSION_1_1:
const.OFPST_GROUP : group_stats_reply.unpack,
const.OFPST_GROUP_DESC : group_desc_stats_reply.unpack,
:: #endif
:: if version >= of_g.VERSION_1_2:
const.OFPST_GROUP_FEATURES : group_features_stats_reply.unpack,
:: #endif
:: if version >= of_g.VERSION_1_3:
const.OFPST_METER : meter_stats_reply.unpack,
const.OFPST_METER_CONFIG : meter_config_stats_reply.unpack,
const.OFPST_METER_FEATURES : meter_features_stats_reply.unpack,
const.OFPST_TABLE_FEATURES : table_features_stats_reply.unpack,
const.OFPST_PORT_DESC : port_desc_stats_reply.unpack,
:: #endif
}
stats_request_parsers = {
const.OFPST_DESC : desc_stats_request.unpack,
const.OFPST_FLOW : flow_stats_request.unpack,
const.OFPST_AGGREGATE : aggregate_stats_request.unpack,
const.OFPST_TABLE : table_stats_request.unpack,
const.OFPST_PORT : port_stats_request.unpack,
const.OFPST_QUEUE : queue_stats_request.unpack,
:: if version >= of_g.VERSION_1_1:
const.OFPST_GROUP : group_stats_request.unpack,
const.OFPST_GROUP_DESC : group_desc_stats_request.unpack,
:: #endif
:: if version >= of_g.VERSION_1_2:
const.OFPST_GROUP_FEATURES : group_features_stats_request.unpack,
:: #endif
:: if version >= of_g.VERSION_1_3:
const.OFPST_METER : meter_stats_request.unpack,
const.OFPST_METER_CONFIG : meter_config_stats_request.unpack,
const.OFPST_METER_FEATURES : meter_features_stats_request.unpack,
const.OFPST_TABLE_FEATURES : table_features_stats_request.unpack,
const.OFPST_PORT_DESC : port_desc_stats_request.unpack,
:: #endif
}
:: experimenter_ofclasses = [x for x in ofclasses if x.type_members[1].value == 4]
:: sort_key = lambda x: x.type_members[2].value
:: experimenter_ofclasses.sort(key=sort_key)
:: grouped = itertools.groupby(experimenter_ofclasses, sort_key)
experimenter_parsers = {
:: for (experimenter, v) in grouped:
${experimenter} : {
:: for ofclass in v:
${ofclass.type_members[3].value}: ${ofclass.pyname}.unpack,
:: #endfor
},
:: #endfor
}