| # |
| # Copyright 2016 the original author or authors. |
| # |
| # 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. |
| # |
| |
| """ |
| Convert loxi objects to openflow_13 messages and back. |
| """ |
| from copy import copy |
| |
| from google.protobuf.descriptor import FieldDescriptor |
| |
| import loxi.of13 as of13 |
| from protobuf_to_dict import protobuf_to_dict, TYPE_CALLABLE_MAP |
| from protos import openflow_13_pb2 as pb2 |
| |
| |
| type_callable_map = copy(TYPE_CALLABLE_MAP) |
| type_callable_map.update({ |
| FieldDescriptor.TYPE_STRING: str |
| }) |
| |
| def pb2dict(pb): |
| """ |
| Convert protobuf to a dict of values good for instantiating |
| loxi objects (or any other objects). We specialize the protobuf_to_dict |
| library call with our modified decoders. |
| :param pb: protobuf as loaded into Python |
| :return: dict of values |
| """ |
| return protobuf_to_dict(pb, type_callable_map) |
| |
| def to_loxi(grpc_object): |
| cls = grpc_object.__class__ |
| converter = to_loxi_converters[cls] |
| return converter(grpc_object) |
| |
| def to_grpc(loxi_object): |
| cls = loxi_object.__class__ |
| converter = to_grpc_converters[cls] |
| return converter(loxi_object) |
| |
| def ofp_port_to_loxi_port_desc(pb): |
| kw = pb2dict(pb) |
| return of13.common.port_desc(**kw) |
| |
| def ofp_flow_stats_to_loxi_flow_stats(pb): |
| kw = pb2dict(pb) |
| |
| def make_loxi_match(match): |
| assert match['type'] == pb2.OFPMT_OXM |
| loxi_match_fields = [] |
| for oxm_field in match['oxm_fields']: |
| assert oxm_field['oxm_class'] == pb2.OFPXMC_OPENFLOW_BASIC |
| ofb_field = oxm_field['ofb_field'] |
| field_type = ofb_field.get('type', 0) |
| if field_type == pb2.OFPXMT_OFB_ETH_TYPE: |
| loxi_match_fields.append( |
| of13.oxm.eth_type(value=ofb_field['eth_type'])) |
| else: |
| raise NotImplementedError( |
| 'OXM match field for type %s' % field_type) |
| return of13.match_v3(oxm_list=loxi_match_fields) |
| |
| def make_loxi_action(a): |
| type = a.get('type', 0) |
| if type == pb2.OFPAT_OUTPUT: |
| output = a['output'] |
| return of13.action.output(**output) |
| else: |
| raise NotImplementedError( |
| 'Action decoder for action OFPAT_* %d' % type) |
| |
| def make_loxi_instruction(inst): |
| type = inst['type'] |
| if type == pb2.OFPIT_APPLY_ACTIONS: |
| return of13.instruction.apply_actions( |
| actions=[make_loxi_action(a) |
| for a in inst['actions']['actions']]) |
| else: |
| raise NotImplementedError('Instruction type %d' % type) |
| |
| kw['match'] = make_loxi_match(kw['match']) |
| kw['instructions'] = [make_loxi_instruction(i) for i in kw['instructions']] |
| return of13.flow_stats_entry(**kw) |
| |
| |
| to_loxi_converters = { |
| pb2.ofp_port: ofp_port_to_loxi_port_desc, |
| pb2.ofp_flow_stats: ofp_flow_stats_to_loxi_flow_stats |
| } |
| |
| |
| def loxi_flow_mod_to_ofp_flow_mod(lo): |
| return pb2.ofp_flow_mod( |
| cookie=lo.cookie, |
| cookie_mask=lo.cookie_mask, |
| table_id=lo.table_id, |
| command=lo._command, |
| idle_timeout=lo.idle_timeout, |
| hard_timeout=lo.hard_timeout, |
| priority=lo.priority, |
| buffer_id=lo.buffer_id, |
| out_port=lo.out_port, |
| out_group=lo.out_group, |
| flags=lo.flags, |
| match=to_grpc(lo.match), |
| instructions=[to_grpc(i) for i in lo.instructions]) |
| |
| |
| def loxi_group_mod_to_ofp_group_mod(lo): |
| return pb2.ofp_group_mod( |
| command=lo.command, |
| type=lo.group_type, |
| group_id=lo.group_id, |
| buckets=[to_grpc(b) for b in lo.buckets]) |
| |
| |
| def loxi_match_v3_to_ofp_match(lo): |
| return pb2.ofp_match( |
| type=pb2.OFPMT_OXM, |
| oxm_fields=[to_grpc(f) for f in lo.oxm_list]) |
| |
| |
| def loxi_bucket_to_ofp_bucket(lo): |
| return pb2.ofp_bucket( |
| weight=lo.weight, |
| watch_port=lo.watch_port, |
| watch_group=lo.watch_group, |
| actions=[to_grpc(a) for a in lo.actions] |
| ) |
| |
| def loxi_oxm_eth_type_to_ofp_oxm(lo): |
| return pb2.ofp_oxm_field( |
| oxm_class=pb2.OFPXMC_OPENFLOW_BASIC, |
| ofb_field=pb2.ofp_oxm_ofb_field( |
| type=pb2.OFPXMT_OFB_ETH_TYPE, |
| eth_type=lo.value)) |
| |
| |
| def loxi_oxm_in_port_to_ofp_oxm(lo): |
| return pb2.ofp_oxm_field( |
| oxm_class=pb2.OFPXMC_OPENFLOW_BASIC, |
| ofb_field=pb2.ofp_oxm_ofb_field( |
| type=pb2.OFPXMT_OFB_IN_PORT, |
| port=lo.value)) |
| |
| |
| def loxi_oxm_ip_proto_to_ofp_oxm(lo): |
| return pb2.ofp_oxm_field( |
| oxm_class=pb2.OFPXMC_OPENFLOW_BASIC, |
| ofb_field=pb2.ofp_oxm_ofb_field( |
| type=pb2.OFPXMT_OFB_IP_PROTO, |
| ip_proto=lo.value)) |
| |
| |
| def loxi_oxm_vlan_vid_to_ofp_oxm(lo): |
| return pb2.ofp_oxm_field( |
| oxm_class=pb2.OFPXMC_OPENFLOW_BASIC, |
| ofb_field=pb2.ofp_oxm_ofb_field( |
| type=pb2.OFPXMT_OFB_VLAN_VID, |
| vlan_vid=lo.value)) |
| |
| |
| def loxi_oxm_vlan_pcp_to_ofp_oxm(lo): |
| return pb2.ofp_oxm_field( |
| oxm_class=pb2.OFPXMC_OPENFLOW_BASIC, |
| ofb_field=pb2.ofp_oxm_ofb_field( |
| type=pb2.OFPXMT_OFB_VLAN_PCP, |
| vlan_pcp=lo.value)) |
| |
| |
| def loxi_oxm_ipv4_dst_to_ofp_oxm(lo): |
| return pb2.ofp_oxm_field( |
| oxm_class=pb2.OFPXMC_OPENFLOW_BASIC, |
| ofb_field=pb2.ofp_oxm_ofb_field( |
| type=pb2.OFPXMT_OFB_IPV4_DST, |
| ipv4_dst=lo.value)) |
| |
| |
| def loxi_apply_actions_to_ofp_instruction(lo): |
| return pb2.ofp_instruction( |
| type=pb2.OFPIT_APPLY_ACTIONS, |
| actions=pb2.ofp_instruction_actions( |
| actions=[to_grpc(a) for a in lo.actions])) |
| |
| |
| def loxi_goto_table_to_ofp_instruction(lo): |
| return pb2.ofp_instruction( |
| type=pb2.OFPIT_GOTO_TABLE, |
| goto_table=pb2.ofp_instruction_goto_table(table_id=lo.table_id)) |
| |
| |
| def loxi_output_action_to_ofp_action(lo): |
| return pb2.ofp_action( |
| type=pb2.OFPAT_OUTPUT, |
| output=pb2.ofp_action_output(port=lo.port, max_len=lo.max_len)) |
| |
| |
| def loxi_group_action_to_ofp_action(lo): |
| return pb2.ofp_action( |
| type=pb2.OFPAT_GROUP, |
| group=pb2.ofp_action_group(group_id=lo.group_id)) |
| |
| |
| def loxi_set_field_action_to_ofp_action(lo): |
| return pb2.ofp_action( |
| type=pb2.OFPAT_SET_FIELD, |
| set_field=pb2.ofp_action_set_field(field=to_grpc(lo.field))) |
| |
| |
| def loxi_pop_vlan_action_to_ofp_action(lo): |
| return pb2.ofp_action(type=pb2.OFPAT_POP_VLAN) |
| |
| |
| def loxi_push_vlan_action_to_ofp_action(lo): |
| return pb2.ofp_action( |
| type=pb2.OFPAT_PUSH_VLAN, |
| push=pb2.ofp_action_push(ethertype=lo.ethertype)) |
| |
| |
| to_grpc_converters = { |
| |
| of13.message.flow_add: loxi_flow_mod_to_ofp_flow_mod, |
| of13.message.flow_delete: loxi_flow_mod_to_ofp_flow_mod, |
| of13.message.flow_delete_strict: loxi_flow_mod_to_ofp_flow_mod, |
| of13.message.flow_modify: loxi_flow_mod_to_ofp_flow_mod, |
| of13.message.flow_modify_strict: loxi_flow_mod_to_ofp_flow_mod, |
| |
| of13.message.group_add: loxi_group_mod_to_ofp_group_mod, |
| of13.message.group_delete: loxi_group_mod_to_ofp_group_mod, |
| of13.message.group_modify: loxi_group_mod_to_ofp_group_mod, |
| |
| of13.common.match_v3: loxi_match_v3_to_ofp_match, |
| of13.common.bucket: loxi_bucket_to_ofp_bucket, |
| |
| of13.oxm.eth_type: loxi_oxm_eth_type_to_ofp_oxm, |
| of13.oxm.in_port: loxi_oxm_in_port_to_ofp_oxm, |
| of13.oxm.ip_proto: loxi_oxm_ip_proto_to_ofp_oxm, |
| of13.oxm.vlan_vid: loxi_oxm_vlan_vid_to_ofp_oxm, |
| of13.oxm.vlan_pcp: loxi_oxm_vlan_pcp_to_ofp_oxm, |
| of13.oxm.ipv4_dst: loxi_oxm_ipv4_dst_to_ofp_oxm, |
| |
| of13.instruction.apply_actions: loxi_apply_actions_to_ofp_instruction, |
| of13.instruction.goto_table: loxi_goto_table_to_ofp_instruction, |
| |
| of13.action.output: loxi_output_action_to_ofp_action, |
| of13.action.group: loxi_group_action_to_ofp_action, |
| of13.action.set_field: loxi_set_field_action_to_ofp_action, |
| of13.action.pop_vlan: loxi_pop_vlan_action_to_ofp_action, |
| of13.action.push_vlan: loxi_push_vlan_action_to_ofp_action, |
| } |