| # |
| # Copyright 2018 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. |
| # |
| import copy |
| from twisted.internet import reactor |
| import grpc |
| |
| from voltha.protos.openflow_13_pb2 import OFPXMC_OPENFLOW_BASIC, \ |
| ofp_flow_stats, OFPMT_OXM, Flows, FlowGroups, OFPXMT_OFB_IN_PORT, \ |
| OFPXMT_OFB_VLAN_VID |
| from voltha.protos.device_pb2 import Port |
| import voltha.core.flow_decomposer as fd |
| import openolt_platform as platform |
| from voltha.adapters.openolt.protos import openolt_pb2 |
| from voltha.registry import registry |
| |
| HSIA_FLOW_INDEX = 0 # FIXME |
| DHCP_FLOW_INDEX = 1 # FIXME |
| DHCP_DOWNLINK_FLOW_INDEX = 6 # FIXME |
| EAPOL_FLOW_INDEX = 2 # FIXME |
| EAPOL_DOWNLINK_FLOW_INDEX = 3 # FIXME |
| EAPOL_DOWNLINK_SECONDARY_FLOW_INDEX = 4 # FIXME |
| EAPOL_UPLINK_SECONDARY_FLOW_INDEX = 5 # FIXME |
| LLDP_FLOW_INDEX = 7 # FIXME |
| |
| EAP_ETH_TYPE = 0x888e |
| LLDP_ETH_TYPE = 0x88cc |
| |
| # FIXME - see also BRDCM_DEFAULT_VLAN in broadcom_onu.py |
| DEFAULT_MGMT_VLAN = 4091 |
| |
| |
| class OpenOltFlowMgr(object): |
| |
| def __init__(self, log, stub, device_id, logical_device_id): |
| self.log = log |
| self.stub = stub |
| self.device_id = device_id |
| self.logical_device_id = logical_device_id |
| self.logical_flows_proxy = registry('core').get_proxy( |
| '/logical_devices/{}/flows'.format(self.logical_device_id)) |
| self.flows_proxy = registry('core').get_proxy( |
| '/devices/{}/flows'.format(self.device_id)) |
| self.root_proxy = registry('core').get_proxy('/') |
| |
| def add_flow(self, flow): |
| self.log.debug('add flow', flow=flow) |
| classifier_info = dict() |
| action_info = dict() |
| |
| for field in fd.get_ofb_fields(flow): |
| if field.type == fd.ETH_TYPE: |
| classifier_info['eth_type'] = field.eth_type |
| self.log.debug('field-type-eth-type', |
| eth_type=classifier_info['eth_type']) |
| elif field.type == fd.IP_PROTO: |
| classifier_info['ip_proto'] = field.ip_proto |
| self.log.debug('field-type-ip-proto', |
| ip_proto=classifier_info['ip_proto']) |
| elif field.type == fd.IN_PORT: |
| classifier_info['in_port'] = field.port |
| self.log.debug('field-type-in-port', |
| in_port=classifier_info['in_port']) |
| elif field.type == fd.VLAN_VID: |
| classifier_info['vlan_vid'] = field.vlan_vid & 0xfff |
| self.log.debug('field-type-vlan-vid', |
| vlan=classifier_info['vlan_vid']) |
| elif field.type == fd.VLAN_PCP: |
| classifier_info['vlan_pcp'] = field.vlan_pcp |
| self.log.debug('field-type-vlan-pcp', |
| pcp=classifier_info['vlan_pcp']) |
| elif field.type == fd.UDP_DST: |
| classifier_info['udp_dst'] = field.udp_dst |
| self.log.debug('field-type-udp-dst', |
| udp_dst=classifier_info['udp_dst']) |
| elif field.type == fd.UDP_SRC: |
| classifier_info['udp_src'] = field.udp_src |
| self.log.debug('field-type-udp-src', |
| udp_src=classifier_info['udp_src']) |
| elif field.type == fd.IPV4_DST: |
| classifier_info['ipv4_dst'] = field.ipv4_dst |
| self.log.debug('field-type-ipv4-dst', |
| ipv4_dst=classifier_info['ipv4_dst']) |
| elif field.type == fd.IPV4_SRC: |
| classifier_info['ipv4_src'] = field.ipv4_src |
| self.log.debug('field-type-ipv4-src', |
| ipv4_dst=classifier_info['ipv4_src']) |
| elif field.type == fd.METADATA: |
| classifier_info['metadata'] = field.table_metadata |
| self.log.debug('field-type-metadata', |
| metadata=classifier_info['metadata']) |
| else: |
| raise NotImplementedError('field.type={}'.format( |
| field.type)) |
| |
| for action in fd.get_actions(flow): |
| if action.type == fd.OUTPUT: |
| action_info['output'] = action.output.port |
| self.log.debug('action-type-output', |
| output=action_info['output'], |
| in_port=classifier_info['in_port']) |
| elif action.type == fd.POP_VLAN: |
| if fd.get_goto_table_id(flow) is None: |
| self.log.debug('being taken care of by ONU', flow=flow) |
| return |
| action_info['pop_vlan'] = True |
| self.log.debug('action-type-pop-vlan', |
| in_port=classifier_info['in_port']) |
| elif action.type == fd.PUSH_VLAN: |
| action_info['push_vlan'] = True |
| action_info['tpid'] = action.push.ethertype |
| self.log.debug('action-type-push-vlan', |
| push_tpid=action_info['tpid'], |
| in_port=classifier_info['in_port']) |
| if action.push.ethertype != 0x8100: |
| self.log.error('unhandled-tpid', |
| ethertype=action.push.ethertype) |
| elif action.type == fd.SET_FIELD: |
| # action_info['action_type'] = 'set_field' |
| _field = action.set_field.field.ofb_field |
| assert (action.set_field.field.oxm_class == |
| OFPXMC_OPENFLOW_BASIC) |
| self.log.debug('action-type-set-field', field=_field, |
| in_port=classifier_info['in_port']) |
| if _field.type == fd.VLAN_VID: |
| self.log.debug('set-field-type-vlan-vid', |
| vlan_vid=_field.vlan_vid & 0xfff) |
| action_info['vlan_vid'] = (_field.vlan_vid & 0xfff) |
| else: |
| self.log.error('unsupported-action-set-field-type', |
| field_type=_field.type) |
| else: |
| self.log.error('unsupported-action-type', |
| action_type=action.type, |
| in_port=classifier_info['in_port']) |
| |
| if fd.get_goto_table_id(flow) is not None and not 'pop_vlan' in \ |
| action_info: |
| self.log.debug('being taken care of by ONU', flow=flow) |
| return |
| |
| if not 'output' in action_info and 'metadata' in classifier_info: |
| # find flow in the next table |
| next_flow = self.find_next_flow(flow) |
| if next_flow is None: |
| return |
| action_info['output'] = fd.get_out_port(next_flow) |
| for field in fd.get_ofb_fields(next_flow): |
| if field.type == fd.VLAN_VID: |
| classifier_info['metadata'] = field.vlan_vid & 0xfff |
| |
| (intf_id, onu_id) = platform.extract_access_from_flow( |
| classifier_info['in_port'], action_info['output']) |
| |
| self.divide_and_add_flow(intf_id, onu_id, classifier_info, |
| action_info, flow) |
| |
| def remove_flow(self, flow): |
| self.log.debug('trying to remove flows from logical flow :', |
| logical_flow=flow) |
| device_flows_to_remove = [] |
| device_flows = self.flows_proxy.get('/').items |
| for f in device_flows: |
| if f.cookie == flow.id: |
| device_flows_to_remove.append(f) |
| |
| for f in device_flows_to_remove: |
| (id, direction) = self.decode_stored_id(f.id) |
| flow_to_remove = openolt_pb2.Flow(flow_id=id, flow_type=direction) |
| try: |
| self.stub.FlowRemove(flow_to_remove) |
| except grpc.RpcError as grpc_e: |
| if grpc_e.code() == grpc.StatusCode.NOT_FOUND: |
| self.log.debug('This flow does not exist on the switch, ' |
| 'normal after an OLT reboot', |
| flow=flow_to_remove) |
| else: |
| raise grpc_e |
| |
| self.log.debug('flow removed from device', flow=f, |
| flow_key=flow_to_remove) |
| |
| if len(device_flows_to_remove) > 0: |
| new_flows = [] |
| flows_ids_to_remove = [f.id for f in device_flows_to_remove] |
| for f in device_flows: |
| if f.id not in flows_ids_to_remove: |
| new_flows.append(f) |
| |
| self.flows_proxy.update('/', Flows(items=new_flows)) |
| self.log.debug('flows removed from the data store', |
| flow_ids_removed=flows_ids_to_remove, |
| number_of_flows_removed=(len(device_flows) - len( |
| new_flows)), expected_flows_removed=len( |
| device_flows_to_remove)) |
| else: |
| self.log.debug('no device flow to remove for this flow (normal ' |
| 'for multi table flows)', flow=flow) |
| |
| def divide_and_add_flow(self, intf_id, onu_id, classifier, |
| action, flow): |
| |
| self.log.debug('sorting flow', intf_id=intf_id, onu_id=onu_id, |
| classifier=classifier, action=action) |
| |
| if 'ip_proto' in classifier: |
| if classifier['ip_proto'] == 17: |
| self.log.debug('dhcp flow add') |
| self.add_dhcp_trap(intf_id, onu_id, classifier, |
| action, flow) |
| elif classifier['ip_proto'] == 2: |
| self.log.warn('igmp flow add ignored, not implemented yet') |
| else: |
| self.log.warn("Invalid-Classifier-to-handle", |
| classifier=classifier, |
| action=action) |
| elif 'eth_type' in classifier: |
| if classifier['eth_type'] == EAP_ETH_TYPE: |
| self.log.debug('eapol flow add') |
| self.add_eapol_flow(intf_id, onu_id, flow) |
| vlan_id = self.get_subscriber_vlan(fd.get_in_port(flow)) |
| if vlan_id is not None: |
| self.add_eapol_flow( |
| intf_id, onu_id, flow, |
| uplink_eapol_id=EAPOL_UPLINK_SECONDARY_FLOW_INDEX, |
| downlink_eapol_id=EAPOL_DOWNLINK_SECONDARY_FLOW_INDEX, |
| vlan_id=vlan_id) |
| if classifier['eth_type'] == LLDP_ETH_TYPE: |
| self.log.debug('lldp flow add') |
| self.add_lldp_flow(intf_id, onu_id, flow, classifier, |
| action) |
| |
| elif 'push_vlan' in action: |
| self.add_upstream_data_flow(intf_id, onu_id, classifier, action, |
| flow) |
| elif 'pop_vlan' in action: |
| self.add_downstream_data_flow(intf_id, onu_id, classifier, |
| action, flow) |
| else: |
| self.log.debug('Invalid-flow-type-to-handle', |
| classifier=classifier, |
| action=action, flow=flow) |
| |
| def add_upstream_data_flow(self, intf_id, onu_id, uplink_classifier, |
| uplink_action, logical_flow): |
| |
| uplink_classifier['pkt_tag_type'] = 'single_tag' |
| |
| self.add_hsia_flow(intf_id, onu_id, uplink_classifier, |
| uplink_action, 'upstream', HSIA_FLOW_INDEX, |
| logical_flow) |
| |
| # Secondary EAP on the subscriber vlan |
| (eap_active, eap_logical_flow) = self.is_eap_enabled(intf_id, onu_id) |
| if eap_active: |
| self.add_eapol_flow( |
| intf_id, onu_id, eap_logical_flow, |
| uplink_eapol_id=EAPOL_UPLINK_SECONDARY_FLOW_INDEX, |
| downlink_eapol_id=EAPOL_DOWNLINK_SECONDARY_FLOW_INDEX, |
| vlan_id=uplink_classifier['vlan_vid']) |
| |
| def add_downstream_data_flow(self, intf_id, onu_id, downlink_classifier, |
| downlink_action, flow): |
| downlink_classifier['pkt_tag_type'] = 'double_tag' |
| # Needed ???? It should be already there |
| downlink_action['pop_vlan'] = True |
| downlink_action['vlan_vid'] = downlink_classifier['vlan_vid'] |
| |
| self.add_hsia_flow(intf_id, onu_id, downlink_classifier, |
| downlink_action, 'downstream', HSIA_FLOW_INDEX, |
| flow) |
| |
| # To-Do right now only one GEM port is supported, so below method |
| # will take care of handling all the p bits. |
| # We need to revisit when mulitple gem port per p bits is needed. |
| # Waiting for Technology profile |
| def add_hsia_flow(self, intf_id, onu_id, classifier, action, |
| direction, hsia_id, logical_flow): |
| |
| gemport_id = platform.mk_gemport_id(intf_id, onu_id) |
| flow_id = platform.mk_flow_id(intf_id, onu_id, hsia_id) |
| |
| flow = openolt_pb2.Flow( |
| onu_id=onu_id, flow_id=flow_id, flow_type=direction, |
| access_intf_id=intf_id, gemport_id=gemport_id, |
| priority=logical_flow.priority, |
| classifier=self.mk_classifier(classifier), |
| action=self.mk_action(action)) |
| |
| self.add_flow_to_device(flow, logical_flow) |
| |
| def add_dhcp_trap(self, intf_id, onu_id, classifier, action, logical_flow): |
| |
| self.log.debug('add dhcp upstream trap', classifier=classifier, |
| action=action) |
| |
| action.clear() |
| action['trap_to_host'] = True |
| classifier['pkt_tag_type'] = 'single_tag' |
| classifier.pop('vlan_vid', None) |
| |
| gemport_id = platform.mk_gemport_id(intf_id, onu_id) |
| flow_id = platform.mk_flow_id(intf_id, onu_id, DHCP_FLOW_INDEX) |
| |
| upstream_flow = openolt_pb2.Flow( |
| onu_id=onu_id, flow_id=flow_id, flow_type="upstream", |
| access_intf_id=intf_id, gemport_id=gemport_id, |
| priority=logical_flow.priority, |
| classifier=self.mk_classifier(classifier), |
| action=self.mk_action(action)) |
| |
| self.add_flow_to_device(upstream_flow, logical_flow) |
| |
| # FIXME - ONOS should send explicit upstream and downstream |
| # exact dhcp trap flow. |
| |
| downstream_logical_flow = copy.deepcopy(logical_flow) |
| for oxm_field in downstream_logical_flow.match.oxm_fields: |
| if oxm_field.ofb_field.type == OFPXMT_OFB_IN_PORT: |
| oxm_field.ofb_field.port = \ |
| platform.intf_id_to_port_no(0, Port.ETHERNET_NNI) |
| |
| classifier['udp_src'] = 67 |
| classifier['udp_dst'] = 68 |
| classifier['pkt_tag_type'] = 'double_tag' |
| action.pop('push_vlan', None) |
| |
| flow_id = platform.mk_flow_id(intf_id, onu_id, |
| DHCP_DOWNLINK_FLOW_INDEX) |
| |
| downstream_flow = openolt_pb2.Flow( |
| onu_id=onu_id, flow_id=flow_id, flow_type="downstream", |
| access_intf_id=intf_id, network_intf_id=0, gemport_id=gemport_id, |
| priority=logical_flow.priority, classifier=self.mk_classifier( |
| classifier), |
| action=self.mk_action(action)) |
| |
| self.add_flow_to_device(downstream_flow, downstream_logical_flow) |
| |
| def add_eapol_flow(self, intf_id, onu_id, logical_flow, |
| uplink_eapol_id=EAPOL_FLOW_INDEX, |
| downlink_eapol_id=EAPOL_DOWNLINK_FLOW_INDEX, |
| vlan_id=DEFAULT_MGMT_VLAN): |
| |
| |
| |
| uplink_classifier = {} |
| uplink_classifier['eth_type'] = EAP_ETH_TYPE |
| uplink_classifier['pkt_tag_type'] = 'single_tag' |
| uplink_classifier['vlan_vid'] = vlan_id |
| |
| uplink_action = {} |
| uplink_action['trap_to_host'] = True |
| |
| gemport_id = platform.mk_gemport_id(intf_id, onu_id) |
| |
| # Add Upstream EAPOL Flow. |
| |
| uplink_flow_id = platform.mk_flow_id(intf_id, onu_id, uplink_eapol_id) |
| |
| upstream_flow = openolt_pb2.Flow( |
| onu_id=onu_id, flow_id=uplink_flow_id, flow_type="upstream", |
| access_intf_id=intf_id, gemport_id=gemport_id, |
| priority=logical_flow.priority, |
| classifier=self.mk_classifier(uplink_classifier), |
| action=self.mk_action(uplink_action)) |
| |
| logical_flow = copy.deepcopy(logical_flow) |
| logical_flow.match.oxm_fields.extend(fd.mk_oxm_fields([fd.vlan_vid( |
| vlan_id | 0x1000)])) |
| logical_flow.match.type = OFPMT_OXM |
| |
| self.add_flow_to_device(upstream_flow, logical_flow) |
| |
| if vlan_id == DEFAULT_MGMT_VLAN: |
| |
| # Add Downstream EAPOL Flow, Only for first EAP flow |
| |
| downlink_classifier = {} |
| downlink_classifier['pkt_tag_type'] = 'single_tag' |
| downlink_classifier['vlan_vid'] = 4000 - onu_id |
| |
| |
| |
| downlink_action = {} |
| downlink_action['push_vlan'] = True |
| downlink_action['vlan_vid'] = vlan_id |
| |
| downlink_flow_id = platform.mk_flow_id(intf_id, onu_id, |
| downlink_eapol_id) |
| |
| downstream_flow = openolt_pb2.Flow( |
| onu_id=onu_id, flow_id=downlink_flow_id, flow_type="downstream", |
| access_intf_id=intf_id, gemport_id=gemport_id, |
| priority=logical_flow.priority, |
| classifier=self.mk_classifier(downlink_classifier), |
| action=self.mk_action(downlink_action)) |
| |
| downstream_logical_flow = ofp_flow_stats(id=logical_flow.id, |
| cookie=logical_flow.cookie, table_id=logical_flow.table_id, |
| priority=logical_flow.priority, flags=logical_flow.flags) |
| |
| downstream_logical_flow.match.oxm_fields.extend(fd.mk_oxm_fields([ |
| fd.in_port(fd.get_out_port(logical_flow)), |
| fd.vlan_vid((4000 - onu_id) | 0x1000)])) |
| downstream_logical_flow.match.type = OFPMT_OXM |
| |
| downstream_logical_flow.instructions.extend( |
| fd.mk_instructions_from_actions([fd.output( |
| platform.mk_uni_port_num(intf_id, onu_id))])) |
| |
| self.add_flow_to_device(downstream_flow, downstream_logical_flow) |
| |
| def repush_all_different_flows(self): |
| # Check if the device is supposed to have flows, if so add them |
| # Recover static flows after a reboot |
| logical_flows = self.logical_flows_proxy.get('/').items |
| devices_flows = self.flows_proxy.get('/').items |
| logical_flows_ids_provisioned = [f.cookie for f in devices_flows] |
| for logical_flow in logical_flows: |
| try: |
| if logical_flow.id not in logical_flows_ids_provisioned: |
| self.add_flow(logical_flow) |
| except Exception as e: |
| self.log.debug('Problem readding this flow', error=e) |
| |
| def reset_flows(self): |
| self.flows_proxy.update('/', Flows()) |
| |
| def add_lldp_flow(self, intf_id, onu_id, logical_flow, classifier, action): |
| |
| self.log.debug('add lldp downstream trap', classifier=classifier, |
| action=action) |
| |
| action.clear() |
| action['trap_to_host'] = True |
| classifier['pkt_tag_type'] = 'untagged' |
| |
| gemport_id = platform.mk_gemport_id(onu_id) |
| flow_id = platform.mk_flow_id(intf_id, onu_id, LLDP_FLOW_INDEX) |
| |
| downstream_flow = openolt_pb2.Flow( |
| onu_id=onu_id, flow_id=flow_id, flow_type="downstream", |
| access_intf_id=3, network_intf_id=0, gemport_id=gemport_id, |
| priority=logical_flow.priority, |
| classifier=self.mk_classifier(classifier), |
| action=self.mk_action(action)) |
| |
| self.log.debug('add lldp downstream trap', access_intf_id=intf_id, |
| onu_id=onu_id, flow_id=flow_id) |
| self.stub.FlowAdd(downstream_flow) |
| |
| def mk_classifier(self, classifier_info): |
| |
| classifier = openolt_pb2.Classifier() |
| |
| if 'eth_type' in classifier_info: |
| classifier.eth_type = classifier_info['eth_type'] |
| if 'ip_proto' in classifier_info: |
| classifier.ip_proto = classifier_info['ip_proto'] |
| if 'vlan_vid' in classifier_info: |
| classifier.o_vid = classifier_info['vlan_vid'] |
| if 'metadata' in classifier_info: |
| classifier.i_vid = classifier_info['metadata'] |
| if 'vlan_pcp' in classifier_info: |
| classifier.o_pbits = classifier_info['vlan_pcp'] |
| if 'udp_src' in classifier_info: |
| classifier.src_port = classifier_info['udp_src'] |
| if 'udp_dst' in classifier_info: |
| classifier.dst_port = classifier_info['udp_dst'] |
| if 'ipv4_dst' in classifier_info: |
| classifier.dst_ip = classifier_info['ipv4_dst'] |
| if 'ipv4_src' in classifier_info: |
| classifier.src_ip = classifier_info['ipv4_src'] |
| if 'pkt_tag_type' in classifier_info: |
| if classifier_info['pkt_tag_type'] == 'single_tag': |
| classifier.pkt_tag_type = 'single_tag' |
| elif classifier_info['pkt_tag_type'] == 'double_tag': |
| classifier.pkt_tag_type = 'double_tag' |
| elif classifier_info['pkt_tag_type'] == 'untagged': |
| classifier.pkt_tag_type = 'untagged' |
| else: |
| classifier.pkt_tag_type = 'none' |
| |
| return classifier |
| |
| def mk_action(self, action_info): |
| action = openolt_pb2.Action() |
| |
| if 'pop_vlan' in action_info: |
| action.o_vid = action_info['vlan_vid'] |
| action.cmd.remove_outer_tag = True |
| elif 'push_vlan' in action_info: |
| action.o_vid = action_info['vlan_vid'] |
| action.cmd.add_outer_tag = True |
| elif 'trap_to_host' in action_info: |
| action.cmd.trap_to_host = True |
| else: |
| self.log.info('Invalid-action-field', action_info=action_info) |
| return |
| return action |
| |
| def is_eap_enabled(self, intf_id, onu_id): |
| flows = self.logical_flows_proxy.get('/').items |
| |
| for flow in flows: |
| eap_flow = False |
| eap_intf_id = None |
| eap_onu_id = None |
| for field in fd.get_ofb_fields(flow): |
| if field.type == fd.ETH_TYPE: |
| if field.eth_type == EAP_ETH_TYPE: |
| eap_flow = True |
| if field.type == fd.IN_PORT: |
| eap_intf_id = platform.intf_id_from_uni_port_num( |
| field.port) |
| eap_onu_id = platform.onu_id_from_port_num(field.port) |
| |
| if eap_flow: |
| self.log.debug('eap flow detected', onu_id=onu_id, |
| intf_id=intf_id, eap_intf_id=eap_intf_id, |
| eap_onu_id=eap_onu_id) |
| if eap_flow and intf_id == eap_intf_id and onu_id == eap_onu_id: |
| return (True, flow) |
| |
| return (False, None) |
| |
| def get_subscriber_vlan(self, port): |
| self.log.debug('looking from subscriber flow for port', port=port) |
| |
| flows = self.logical_flows_proxy.get('/').items |
| for flow in flows: |
| in_port = fd.get_in_port(flow) |
| out_port = fd.get_out_port(flow) |
| |
| if in_port == port and \ |
| platform.intf_id_to_port_type_name(out_port) == Port.ETHERNET_NNI: |
| fields = fd.get_ofb_fields(flow) |
| self.log.debug('subscriber flow found', fields=fields) |
| for field in fields: |
| if field.type == OFPXMT_OFB_VLAN_VID: |
| self.log.debug('subscriber vlan found', |
| vlan_id=field.vlan_vid) |
| return field.vlan_vid & 0x0fff |
| self.log.debug('No subscriber flow found', port=port) |
| return None |
| |
| def add_flow_to_device(self, flow, logical_flow): |
| self.log.debug('pushing flow to device', flow=flow) |
| self.stub.FlowAdd(flow) |
| self.register_flow(logical_flow, flow) |
| |
| def register_flow(self, logical_flow, device_flow): |
| self.log.debug('registering flow in device', |
| logical_flow=logical_flow, device_flow=device_flow) |
| stored_flow = copy.deepcopy(logical_flow) |
| stored_flow.id = self.generate_stored_id(device_flow.flow_id, |
| device_flow.flow_type) |
| self.log.debug('generated device flow id', id=stored_flow.id, |
| flow_id=device_flow.flow_id, |
| direction=device_flow.flow_type) |
| stored_flow.cookie = logical_flow.id |
| flows = self.flows_proxy.get('/') |
| flows.items.extend([stored_flow]) |
| self.flows_proxy.update('/', flows) |
| |
| def find_next_flow(self, flow): |
| table_id = fd.get_goto_table_id(flow) |
| metadata = 0 |
| for field in fd.get_ofb_fields(flow): |
| if field.type == fd.METADATA: |
| metadata = field.table_metadata |
| if table_id is None: |
| return None |
| flows = self.logical_flows_proxy.get('/').items |
| next_flows = [] |
| for f in flows: |
| if f.table_id == table_id: |
| # FIXME |
| if fd.get_in_port(f) == fd.get_in_port(flow) and \ |
| fd.get_out_port(f) == metadata: |
| |
| next_flows.append(f) |
| |
| if len(next_flows) == 0: |
| self.log.warning('no next flow found, it may be a timing issue', |
| flow=flow, number_of_flows=len(flows)) |
| reactor.callLater(5, self.add_flow, flow) |
| return None |
| |
| next_flows.sort(key=lambda f: f.priority, reverse=True) |
| |
| return next_flows[0] |
| |
| def update_children_flows(self, device_rules_map): |
| |
| for device_id, (flows, groups) in device_rules_map.iteritems(): |
| if device_id != self.device_id: |
| self.root_proxy.update('/devices/{}/flows'.format(device_id), |
| Flows(items=flows.values())) |
| self.root_proxy.update('/devices/{}/flow_groups'.format( |
| device_id), FlowGroups(items=groups.values())) |
| |
| def generate_stored_id(self, flow_id, direction): |
| if direction == 'upstream': |
| self.log.debug('upstream flow, shifting id') |
| return 0x1 << 15 | flow_id |
| elif direction == 'downstream': |
| self.log.debug('downstream flow, not shifting id') |
| return flow_id |
| else: |
| self.log.warn('Unrecognized direction', direction=direction) |
| return flow_id |
| |
| def decode_stored_id(self, id): |
| if id >> 15 == 0x1: |
| return (id & 0x7fff, 'upstream') |
| else: |
| return (id, 'downstream') |