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;
29 * we validated this packet when we accepted it in the DP, so
30 * this number is safe to use
32 n = clib_net_to_host_u16 (r->n_src_addresses);
36 /* a (*,G) join has no source address specified */
37 vec_validate (srcs, 0);
38 srcs[0].ip4.as_u32 = 0;
42 vec_validate (srcs, n - 1);
45 for (ii = 0; ii < n; ii++)
56 igmp_handle_group_update (igmp_config_t * config,
57 const igmp_membership_group_v3_t * igmp_group)
59 ip46_address_t *src, *srcs;
61 ip46_address_t key = {
62 .ip4 = igmp_group->group_address,
65 srcs = igmp_group_mk_source_list (igmp_group);
66 group = igmp_group_lookup (config, &key);
68 IGMP_DBG (" ..group-update: %U (%U, %U)",
69 format_vnet_sw_if_index_name,
70 vnet_get_main (), config->sw_if_index,
71 format_igmp_key, &key, format_igmp_src_addr_list, srcs);
75 group = igmp_group_alloc (config, &key, IGMP_FILTER_MODE_INCLUDE);
78 /* create or update all sources */
79 vec_foreach (src, srcs)
81 igmp_group_src_update (group, src, IGMP_MODE_ROUTER);
88 igmp_handle_group_block (igmp_config_t * config,
89 const igmp_membership_group_v3_t * igmp_group)
91 ip46_address_t *s, *srcs;
92 igmp_pkt_build_query_t bq;
94 ip46_address_t key = {
95 .ip4 = igmp_group->group_address,
98 srcs = igmp_group_mk_source_list (igmp_group);
99 group = igmp_group_lookup (config, &key);
101 IGMP_DBG (" ..group-block: %U (%U, %U)",
102 format_vnet_sw_if_index_name,
103 vnet_get_main (), config->sw_if_index,
104 format_igmp_key, &key, format_igmp_src_addr_list, srcs);
110 * send a group+source specific query
112 igmp_pkt_build_query_init (&bq, config->sw_if_index);
113 igmp_pkt_query_v3_add_group (&bq, group, srcs);
114 igmp_pkt_query_v3_send (&bq);
117 * for each source left/blocked drop the source expire timer to the leave
120 vec_foreach (s, srcs)
122 src = igmp_src_lookup (group, s);
124 igmp_src_blocked (src);
128 * a block/leave from a group for which we have no state
135 igmp_handle_group (igmp_config_t * config,
136 const igmp_membership_group_v3_t * igmp_group)
138 IGMP_DBG ("rx-group-report: %U",
139 format_vnet_sw_if_index_name,
140 vnet_get_main (), config->sw_if_index);
142 switch (igmp_group->type)
144 case IGMP_MEMBERSHIP_GROUP_mode_is_include:
145 case IGMP_MEMBERSHIP_GROUP_change_to_include:
146 case IGMP_MEMBERSHIP_GROUP_allow_new_sources:
147 igmp_handle_group_update (config, igmp_group);
149 case IGMP_MEMBERSHIP_GROUP_block_old_sources:
150 igmp_handle_group_block (config, igmp_group);
152 case IGMP_MEMBERSHIP_GROUP_mode_is_exclude:
153 case IGMP_MEMBERSHIP_GROUP_change_to_exclude:
156 * all other types ignored
162 igmp_handle_report (const igmp_report_args_t * args)
164 const igmp_membership_group_v3_t *igmp_group;
165 igmp_config_t *config;
168 config = igmp_config_lookup (args->sw_if_index);
172 * no IGMP config on the interface. quit
176 if (IGMP_MODE_HOST == config->mode)
179 * Hosts need not listen to the reports of other hosts.
186 * we validated this packet when we accepted it in the DP, so
187 * this number is safe to use
189 n_groups = clib_net_to_host_u16 (args->report[0].n_groups);
190 igmp_group = args->report[0].groups;
192 for (ii = 0; ii < n_groups; ii++)
194 igmp_handle_group (config, igmp_group);
196 igmp_group = group_cptr (igmp_group,
197 igmp_membership_group_v3_length (igmp_group));
202 * fd.io coding-style-patch-verification: ON
205 * eval: (c-set-style "gnu")