def _add_resolved_route(self, vlan, ip_gw, ip_dst, eth_dst, is_updated): ofmsgs = [] if is_updated: self.logger.info( 'Updating next hop for route %s via %s (%s) on VLAN %u' % (ip_dst, ip_gw, eth_dst, vlan.vid)) ofmsgs.extend(self._del_route_flows(vlan, ip_dst)) else: self.logger.info('Adding new route %s via %s (%s) on VLAN %u' % (ip_dst, ip_gw, eth_dst, vlan.vid)) if self.use_group_table: inst = [ valve_of.apply_actions([ valve_of.group_act( group_id=self._group_id_from_ip_gw(vlan, ip_gw)) ]) ] else: inst = [ valve_of.apply_actions(self._nexthop_actions(eth_dst, vlan)), valve_of.goto_table(self.eth_dst_table) ] for routed_vlan in self._routed_vlans(vlan): in_match = self._route_match(routed_vlan, ip_dst) ofmsgs.append( self.fib_table.flowmod(in_match, priority=self._route_priority(ip_dst), inst=inst)) return ofmsgs
def _add_resolved_route(self, vlan, ip_gw, ip_dst, eth_dst, is_updated): ofmsgs = [] in_match = self.valve_in_match(self.fib_table, vlan=vlan, eth_type=self._eth_type(), nw_dst=ip_dst) prefixlen = ipaddr.IPNetwork(ip_dst).prefixlen priority = self.route_priority + prefixlen if is_updated: self.logger.info('Updating next hop for route %s via %s (%s)', ip_dst, ip_gw, eth_dst) ofmsgs.extend( self.valve_flowdel(self.fib_table, in_match, priority=priority)) else: self.logger.info('Adding new route %s via %s (%s)', ip_dst, ip_gw, eth_dst) if self.use_group_table: inst = [ valve_of.apply_actions([ valve_of.group_act(group_id=self.ip_gw_to_group_id[ip_gw]) ]) ] else: inst = [ valve_of.apply_actions(self._nexthop_actions(eth_dst)), valve_of.goto_table(self.eth_dst_table) ] ofmsgs.append( self.valve_flowmod(self.fib_table, in_match, priority=priority, inst=inst)) return ofmsgs
def build_output_actions(output_dict): """Implement actions to alter packet/output.""" output_actions = [] output_port = None ofmsgs = [] # if destination rewriting selected, rewrite it. if 'dl_dst' in output_dict: output_actions.append(valve_of.set_eth_dst(output_dict['dl_dst'])) # rewrite any VLAN headers. vlan_actions = rewrite_vlan(output_dict) if vlan_actions: output_actions.extend(vlan_actions) if 'port' in output_dict: output_port = output_dict['port'] output_actions.append(valve_of.output_port(output_port)) if 'failover' in output_dict: failover = output_dict['failover'] group_id = failover['group_id'] buckets = [] for port in failover['ports']: buckets.append( valve_of.bucket(watch_port=port, actions=[valve_of.output_port(port)])) ofmsgs.append(valve_of.groupdel(group_id=group_id)) ofmsgs.append(valve_of.groupadd_ff(group_id=group_id, buckets=buckets)) output_actions.append(valve_of.group_act(group_id=group_id)) return (output_port, output_actions, ofmsgs)
def _add_resolved_route(self, vlan, ip_gw, ip_dst, eth_dst, is_updated): ofmsgs = [] if self.routers: in_match = self._route_match(AnyVlan(), ip_dst) else: in_match = self._route_match(vlan, ip_dst) if is_updated: self.logger.info('Updating next hop for route %s via %s (%s)', ip_dst, ip_gw, eth_dst) ofmsgs.extend(self._del_route_flows(vlan, ip_dst)) else: self.logger.info('Adding new route %s via %s (%s)', ip_dst, ip_gw, eth_dst) if self.use_group_table: inst = [ valve_of.apply_actions([ valve_of.group_act(group_id=self.ip_gw_to_group_id[ip_gw]) ]) ] else: inst = [ valve_of.apply_actions(self._nexthop_actions(eth_dst, vlan)), valve_of.goto_table(self.eth_dst_table) ] ofmsgs.append( self.valve_flowmod(self.fib_table, in_match, priority=self._route_priority(ip_dst), inst=inst)) return ofmsgs
def _add_resolved_route(self, vlan, ip_gw, ip_dst, eth_dst, is_updated=None): ofmsgs = [] if is_updated is not None: in_match = self.valve_in_match( self.fib_table, vlan=vlan, eth_type=self._eth_type(), nw_dst=ip_dst) prefixlen = ipaddr.IPNetwork(ip_dst).prefixlen priority = self.route_priority + prefixlen if is_updated: self.logger.info( 'Updating next hop for route %s via %s (%s)', ip_dst, ip_gw, eth_dst) ofmsgs.extend(self.valve_flowdel( self.fib_table, in_match, priority=priority)) else: self.logger.info( 'Adding new route %s via %s (%s)', ip_dst, ip_gw, eth_dst) if self.use_group_table: inst = [valve_of.apply_actions([valve_of.group_act( group_id=self.ip_gw_to_group_id[ip_gw])])] else: inst = [valve_of.apply_actions(self._nexthop_actions(eth_dst)), valve_of.goto_table(self.eth_dst_table)] ofmsgs.append(self.valve_flowmod( self.fib_table, in_match, priority=priority, inst=inst)) return ofmsgs
def _build_group_flood_rules(self, vlan, modify, command): flood_priority = self.flood_priority broadcast_group = self.groups.get_entry( vlan.vid, self._build_group_buckets(vlan, False)) unicast_group = self.groups.get_entry( vlan.vid + valve_of.VLAN_GROUP_OFFSET, self._build_group_buckets(vlan, vlan.unicast_flood)) ofmsgs = [] if modify: ofmsgs.append(broadcast_group.modify()) ofmsgs.append(unicast_group.modify()) else: ofmsgs.extend(broadcast_group.add()) ofmsgs.extend(unicast_group.add()) for unicast_eth_dst, eth_dst, eth_dst_mask in self.FLOOD_DSTS: if unicast_eth_dst and not vlan.unicast_flood: continue group = broadcast_group if not eth_dst: group = unicast_group match = self.flood_table.match(vlan=vlan, eth_dst=eth_dst, eth_dst_mask=eth_dst_mask) ofmsgs.append( self.flood_table.flowmod( match=match, command=command, inst=[ valve_of.apply_actions( [valve_of.group_act(group.group_id)]) ], priority=flood_priority)) flood_priority += 1 return ofmsgs
def build_flood_rules(self, vlan, modify=False): """Add flows to flood packets to unknown destinations on a VLAN.""" # TODO: not all vendors implement groups well. # That means we need flood rules for each input port, outputting # to all ports except the input port. When all vendors implement # groups correctly we can use them. command = ofp.OFPFC_ADD group_mod_method = valve_of.groupadd if modify: command = ofp.OFPFC_MODIFY_STRICT group_mod_method = valve_of.groupmod flood_priority = self.flood_priority ofmsgs = [] broadcast_buckets = [] unicast_buckets = [] if self.use_group_table and self.stack is None: # Group table usage is not supported for stacking yet # TODO: implement stacking using group table broadcast_buckets = self._build_group_buckets(vlan, False) unicast_buckets = self._build_group_buckets(vlan, vlan.unicast_flood) group_id = vlan.vid ofmsgs.append(group_mod_method( group_id=group_id, buckets=broadcast_buckets)) ofmsgs.append(group_mod_method( group_id=group_id+valve_of.VLAN_GROUP_OFFSET, buckets=unicast_buckets)) for unicast_eth_dst, eth_dst, eth_dst_mask in self.FLOOD_DSTS: if unicast_eth_dst and not vlan.unicast_flood: continue group_id = vlan.vid if not eth_dst: group_id = group_id + valve_of.VLAN_GROUP_OFFSET match = self.valve_in_match( self.flood_table, vlan=vlan, eth_dst=eth_dst, eth_dst_mask=eth_dst_mask) ofmsgs.append(self.valve_flowmod( self.flood_table, match=match, command=command, inst=[valve_of.apply_actions([valve_of.group_act(group_id)])], priority=flood_priority)) flood_priority += 1 else: for unicast_eth_dst, eth_dst, eth_dst_mask in self.FLOOD_DSTS: if unicast_eth_dst and not vlan.unicast_flood: continue ofmsgs.extend(self._build_unmirrored_flood_rules( vlan, eth_dst, eth_dst_mask, unicast_eth_dst, command, flood_priority)) flood_priority += 1 ofmsgs.extend(self._build_mirrored_flood_rules( vlan, eth_dst, eth_dst_mask, unicast_eth_dst, command, flood_priority)) flood_priority += 1 return ofmsgs
def _build_group_flood_rules(self, vlan, modify, command): flood_priority = self.flood_priority broadcast_buckets = self._build_group_buckets(vlan, False) unicast_buckets = self._build_group_buckets(vlan, vlan.unicast_flood) group_id = vlan.vid ofmsgs = [] group_mod_method = valve_of.groupadd if modify: group_mod_method = valve_of.groupmod else: ofmsgs.append(valve_of.groupdel(group_id=group_id)) ofmsgs.append( valve_of.groupdel(group_id=group_id + valve_of.VLAN_GROUP_OFFSET)) ofmsgs.append( group_mod_method(group_id=group_id, buckets=broadcast_buckets)) ofmsgs.append( group_mod_method(group_id=group_id + valve_of.VLAN_GROUP_OFFSET, buckets=unicast_buckets)) for unicast_eth_dst, eth_dst, eth_dst_mask in self.FLOOD_DSTS: if unicast_eth_dst and not vlan.unicast_flood: continue group_id = vlan.vid if not eth_dst: group_id = group_id + valve_of.VLAN_GROUP_OFFSET match = self.valve_in_match(self.flood_table, vlan=vlan, eth_dst=eth_dst, eth_dst_mask=eth_dst_mask) ofmsgs.append( self.valve_flowmod(self.flood_table, match=match, command=command, inst=[ valve_of.apply_actions( [valve_of.group_act(group_id)]) ], priority=flood_priority)) flood_priority += 1 return ofmsgs