2 *------------------------------------------------------------------
3 * Copyright (c) 2018 Cisco and/or its affiliates.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *------------------------------------------------------------------
18 #include <igmp/igmp_report.h>
19 #include <igmp/igmp_pkt.h>
21 static ip46_address_t *
22 igmp_group_mk_source_list (const igmp_membership_group_v3_t * r)
24 ip46_address_t *srcs = NULL;
25 const ip4_address_t *s;
28 n = clib_net_to_host_u16 (r->n_src_addresses);
33 vec_validate (srcs, n - 1);
36 for (ii = 0; ii < n; ii++)
46 igmp_handle_group_update (igmp_config_t * config,
47 const igmp_membership_group_v3_t * igmp_group)
49 ip46_address_t *src, *srcs;
51 ip46_address_t key = {
52 .ip4 = igmp_group->group_address,
55 srcs = igmp_group_mk_source_list (igmp_group);
56 group = igmp_group_lookup (config, &key);
58 IGMP_DBG (" ..group-update: %U (%U, %U)",
59 format_vnet_sw_if_index_name,
60 vnet_get_main (), config->sw_if_index,
61 format_igmp_key, &key, format_igmp_src_addr_list, srcs);
65 group = igmp_group_alloc (config, &key, IGMP_FILTER_MODE_INCLUDE);
68 /* create or update all sources */
69 vec_foreach (src, srcs)
71 igmp_group_src_update (group, src, IGMP_MODE_ROUTER);
78 igmp_handle_group_block (igmp_config_t * config,
79 const igmp_membership_group_v3_t * igmp_group)
81 ip46_address_t *s, *srcs;
82 igmp_pkt_build_query_t bq;
84 ip46_address_t key = {
85 .ip4 = igmp_group->group_address,
88 srcs = igmp_group_mk_source_list (igmp_group);
89 group = igmp_group_lookup (config, &key);
91 IGMP_DBG (" ..group-block: %U (%U, %U)",
92 format_vnet_sw_if_index_name,
93 vnet_get_main (), config->sw_if_index,
94 format_igmp_key, &key, format_igmp_src_addr_list, srcs);
100 * sned a group+source specific query
102 igmp_pkt_build_query_init (&bq, config->sw_if_index);
103 igmp_pkt_query_v3_add_group (&bq, group, srcs);
104 igmp_pkt_query_v3_send (&bq);
107 * for each source left/blocked drop the source expire timer to the leave
110 vec_foreach (s, srcs)
112 src = igmp_src_lookup (group, s);
114 igmp_src_blocked (src);
118 * a block/leave from a group for which we have no state
125 igmp_handle_group (igmp_config_t * config,
126 const igmp_membership_group_v3_t * igmp_group)
128 IGMP_DBG ("rx-group-report: %U",
129 format_vnet_sw_if_index_name,
130 vnet_get_main (), config->sw_if_index);
132 switch (igmp_group->type)
134 case IGMP_MEMBERSHIP_GROUP_mode_is_include:
135 case IGMP_MEMBERSHIP_GROUP_change_to_include:
136 case IGMP_MEMBERSHIP_GROUP_allow_new_sources:
137 igmp_handle_group_update (config, igmp_group);
139 case IGMP_MEMBERSHIP_GROUP_block_old_sources:
140 igmp_handle_group_block (config, igmp_group);
142 case IGMP_MEMBERSHIP_GROUP_mode_is_exclude:
143 case IGMP_MEMBERSHIP_GROUP_change_to_exclude:
146 * all other types ignored
152 igmp_handle_report (const igmp_report_args_t * args)
154 const igmp_membership_group_v3_t *igmp_group;
155 igmp_config_t *config;
158 config = igmp_config_lookup (args->sw_if_index);
162 * no IGMP config on the interface. quit
166 if (IGMP_MODE_HOST == config->mode)
169 * Hosts need not listen to the reports of other hosts.
175 n_groups = clib_net_to_host_u16 (args->report[0].n_groups);
176 igmp_group = args->report[0].groups;
178 for (ii = 0; ii < n_groups; ii++)
180 igmp_handle_group (config, igmp_group);
182 igmp_group = group_cptr (igmp_group,
183 igmp_membership_group_v3_length (igmp_group));
188 * fd.io coding-style-patch-verification: ON
191 * eval: (c-set-style "gnu")