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authorJakub Grajciar <jgrajcia@cisco.com>2017-12-08 16:28:42 +0100
committerChris Luke <chris_luke@comcast.com>2018-03-19 15:53:19 +0000
commit7b867a8e491357058d37838091ed67a2e77bce2c (patch)
tree8f9373e4e41e930d0f20e90305168a1ab80dd714 /src/plugins/igmp/igmp.c
parent489cc829224407a51ca8d612c92bd78c30eaf660 (diff)
IGMP plugin
- host mode: igmp_listen - API to signal that the host has joined an (S,G) - route mode: igmp_enable - API to enable the reception of host IGMP messages igmp_event - API to report the host join/leave from an (S,G) Change-Id: Id180ec27dee617d33ab3088f5dcf6125d3aa9c8f Signed-off-by: Jakub Grajciar <jgrajcia@cisco.com>
Diffstat (limited to 'src/plugins/igmp/igmp.c')
-rw-r--r--src/plugins/igmp/igmp.c849
1 files changed, 849 insertions, 0 deletions
diff --git a/src/plugins/igmp/igmp.c b/src/plugins/igmp/igmp.c
new file mode 100644
index 00000000000..d71e77a74cd
--- /dev/null
+++ b/src/plugins/igmp/igmp.c
@@ -0,0 +1,849 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * 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.
+ *------------------------------------------------------------------
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/plugin/plugin.h>
+#include <vpp/app/version.h>
+#include <vnet/ip/ip.h>
+#include <vnet/mfib/mfib_entry.h>
+#include <vlib/unix/unix.h>
+#include <vnet/adj/adj_mcast.h>
+#include <vnet/fib/fib_entry.h>
+#include <vnet/fib/fib_table.h>
+#include <vnet/mfib/mfib_table.h>
+
+#include <igmp/igmp.h>
+
+#include <limits.h>
+#include <float.h>
+
+igmp_main_t igmp_main;
+
+/* clear all (S,G)s on specified config and remove this config from pool */
+void
+igmp_clear_config (igmp_config_t * config)
+{
+ igmp_main_t *im = &igmp_main;
+ igmp_sg_t *sg;
+
+ ASSERT (config);
+ /* *INDENT-OFF* */
+ pool_foreach (sg, config->sg, (
+ {
+ clib_mem_free (sg->key);
+ }));
+ /* *INDENT-ON* */
+ pool_free (config->sg);
+ hash_free (config->igmp_sg_by_key);
+
+ hash_unset_mem (im->igmp_config_by_sw_if_index, &config->sw_if_index);
+ pool_put (im->configs, config);
+}
+
+/* sort igmp timers, so that the first to expire is at end */
+int
+igmp_timer_compare (const void *_a, const void *_b)
+{
+ const igmp_timer_t *a = _a;
+ const igmp_timer_t *b = _b;
+ f64 dt = b->exp_time - a->exp_time;
+ return dt < 0 ? -1 : (dt > 0 ? +1 : 0);
+}
+
+void
+igmp_sort_timers (igmp_timer_t * timers)
+{
+ vlib_main_t *vm = vlib_get_main ();
+
+ qsort (timers, vec_len (timers), sizeof (igmp_timer_t), igmp_timer_compare);
+
+ vlib_process_signal_event (vm, igmp_timer_process_node.index,
+ IGMP_PROCESS_EVENT_UPDATE_TIMER, 0);
+}
+
+/* create new per interface timer
+ *
+ * - delayed reports
+ * - query msg
+ * - query resp
+ */
+
+void
+igmp_create_int_timer (f64 time, u32 sw_if_index,
+ igmp_timer_function_t * func)
+{
+ igmp_main_t *im = &igmp_main;
+ igmp_timer_t *timer;
+
+ pool_get (im->timers, timer);
+ memset (timer, 0, sizeof (igmp_timer_t));
+ timer->func = func;
+ timer->exp_time = time;
+ timer->sw_if_index = sw_if_index;
+
+ igmp_sort_timers (im->timers);
+}
+
+void
+igmp_create_sg_timer (f64 time, u32 sw_if_index, igmp_sg_key_t * key,
+ igmp_timer_function_t * func)
+{
+ igmp_main_t *im = &igmp_main;
+ igmp_timer_t *timer;
+
+ pool_get (im->timers, timer);
+ memset (timer, 0, sizeof (igmp_timer_t));
+ timer->func = func;
+ timer->exp_time = time;
+ timer->sw_if_index = sw_if_index;
+ /* duplicate key, to prevent segmentation fault if (S,G) is removed */
+ timer->data = clib_mem_alloc (sizeof (igmp_sg_key_t));
+ clib_memcpy (timer->data, key, sizeof (igmp_sg_key_t));
+
+ igmp_sort_timers (im->timers);
+}
+
+/* get next timer to expire */
+always_inline igmp_timer_t *
+igmp_get_next_timer (igmp_main_t * im)
+{
+ if (pool_elts (im->timers) > 0)
+ return vec_elt_at_index (im->timers, pool_elts (im->timers) - 1);
+ return NULL;
+}
+
+/*
+static void
+igmp_create_report_v2 (vlib_buffer_t * b, igmp_config_t * config)
+{
+ ip_csum_t sum;
+ u16 csum;
+ igmp_main_t *im = &igmp_main;
+ igmp_sg_t *sg;
+
+ sg = vec_elt_at_index (config->sg, im->next_index.sg_index);
+
+ igmp_message_t *igmp = (igmp_message_t *) (vlib_buffer_get_current (b));
+ memset (igmp, 0, sizeof (igmp_message_t));
+
+ clib_memcpy (&igmp->dst, &sg->gaddr.ip4, sizeof (ip4_address_t));
+ igmp->header.type =
+ (sg->group_type == IGMP_MEMBERSHIP_GROUP_block_old_sources) ?
+ IGMP_TYPE_leave_group_v2 : IGMP_TYPE_membership_report_v2;
+ sum = ip_incremental_checksum (0, igmp, sizeof (igmp_message_t));
+ csum = ~ip_csum_fold (sum);
+ igmp->header.checksum = csum;
+
+ b->current_data += sizeof (igmp_message_t);
+ b->current_length += sizeof (igmp_message_t);
+}
+*/
+
+/* create IGMPv3 report with single (S,G)
+ * used to send state chenge reports
+ */
+static void
+igmp_create_report_v31 (vlib_buffer_t * b, igmp_config_t * config)
+{
+ ip_csum_t sum;
+ u16 csum;
+ igmp_main_t *im = &igmp_main;
+ igmp_sg_t *sg;
+ u32 len = 0;
+
+ sg = vec_elt_at_index (config->sg, im->next_index.sg_index);
+
+ len = sizeof (igmp_membership_report_v3_t);
+ igmp_membership_report_v3_t *igmp =
+ (igmp_membership_report_v3_t *) (vlib_buffer_get_current (b));
+ memset (igmp, 0, sizeof (igmp_membership_report_v3_t));
+
+ igmp->header.type = IGMP_TYPE_membership_report_v3;
+ igmp->n_groups = clib_host_to_net_u16 (1);
+
+ len += sizeof (igmp_membership_group_v3_t);
+ memset (igmp->groups, 0, sizeof (igmp_membership_group_v3_t));
+ igmp->groups[0].type = sg->group_type;
+ igmp->groups[0].n_aux_u32s = 0;
+ clib_memcpy (&igmp->groups[0].dst_address, &sg->gaddr.ip4,
+ sizeof (ip4_address_t));
+
+ igmp->groups[0].n_src_addresses = clib_host_to_net_u16 (1);
+
+ len += sizeof (ip4_address_t);
+ clib_memcpy (&igmp->groups[0].src_addresses[0], &sg->saddr.ip4,
+ sizeof (ip4_address_t));
+
+ sum = ip_incremental_checksum (0, igmp, len);
+ csum = ~ip_csum_fold (sum);
+ igmp->header.checksum = csum;
+
+ b->current_data += len;
+ b->current_length += len;
+}
+
+u8
+ip4_lookup (ip4_address_t * a, igmp_membership_report_v3_t * igmp, u16 n,
+ igmp_membership_group_v3_type_t type)
+{
+ u16 i;
+ u8 rv = 0;
+ u32 l = sizeof (igmp_membership_report_v3_t);
+
+ for (i = 0; i < n; i++)
+ {
+ if ((!ip4_address_compare (a, &group_ptr (igmp, l)->dst_address)) &&
+ (type == group_ptr (igmp, l)->type))
+ {
+ rv = 1;
+ break;
+ }
+ l += sizeof (igmp_membership_group_v3_t) +
+ clib_net_to_host_u16 (group_ptr (igmp, l)->n_src_addresses) *
+ sizeof (ip4_address_t);
+ }
+
+ return rv;
+}
+
+/* create IGMPv3 report with all (S,G)s on config
+ * used to respond to general queries
+ */
+static void
+igmp_create_report_v32 (vlib_buffer_t * b, igmp_config_t * config)
+{
+ ip_csum_t sum;
+ u16 csum;
+ igmp_sg_t *sg0, *sg1;
+ u32 len = 0;
+ u16 n_groups = 0, n_srcs = 0;
+ u32 grp_s = sizeof (igmp_membership_group_v3_t);
+
+ len = sizeof (igmp_membership_report_v3_t);
+ igmp_membership_report_v3_t *igmp =
+ (igmp_membership_report_v3_t *) (vlib_buffer_get_current (b));
+ memset (igmp, 0, sizeof (igmp_membership_report_v3_t));
+
+ igmp->header.type = IGMP_TYPE_membership_report_v3;
+
+/* TODO: divide (S,G)s to multiple reports...
+ * - create report limited by <packet size|number of (S,G)s>?
+ * - save loop state
+ * - on next timer continue loop
+ * - case of new query -> reset loop
+ */
+ /* *INDENT-OFF* */
+ pool_foreach (sg0, config->sg, (
+ {
+ if (ip4_lookup (&sg0->gaddr.ip4, igmp, n_groups, sg0->group_type))
+ continue;
+ memset (igmp + len, 0, grp_s);
+ clib_memcpy (&group_ptr (igmp, len)->dst_address, &sg0->gaddr.ip4, sizeof (ip4_address_t));
+ group_ptr (igmp, len)->type = sg0->group_type;
+ len += grp_s;
+ n_srcs = 0;
+ pool_foreach (sg1, config->sg, (
+ {
+ if ((!ip4_address_compare (&group_ptr (igmp, len - grp_s)->dst_address,
+ &sg1->gaddr.ip4)) && (group_ptr (igmp, len - grp_s)->type == (sg1->group_type)))
+ {
+ clib_memcpy (group_ptr (igmp, len + sizeof (ip4_address_t) * n_srcs),
+ &sg1->saddr.ip4, sizeof (ip4_address_t));
+ n_srcs++;
+ }
+ }));
+ group_ptr (igmp, len - grp_s)->n_src_addresses = clib_host_to_net_u16 (n_srcs);
+ len += sizeof (ip4_address_t) * n_srcs;
+ n_groups++;
+ }));
+ /* *INDENT-ON* */
+
+ igmp->n_groups = clib_host_to_net_u16 (n_groups);
+
+ sum = ip_incremental_checksum (0, igmp, len);
+ csum = ~ip_csum_fold (sum);
+ igmp->header.checksum = csum;
+
+ b->current_data += len;
+ b->current_length += len;
+}
+
+static void
+igmp_create_general_query_v3 (vlib_buffer_t * b, igmp_config_t * config)
+{
+ vlib_main_t *vm = vlib_get_main ();
+ ip_csum_t sum;
+ u16 csum;
+
+ igmp_message_t *igmp = (igmp_message_t *) (vlib_buffer_get_current (b));
+ memset (igmp, 0, sizeof (igmp_membership_query_v3_t));
+
+ igmp->header.type = IGMP_TYPE_membership_query;
+ igmp->header.code = 100;
+
+ config->flags &= ~IGMP_CONFIG_FLAG_QUERY_RESP_RECVED;
+ igmp_create_int_timer (vlib_time_now (vm) + (f64) (igmp->header.code / 10),
+ config->sw_if_index, igmp_query_resp_exp);
+
+ sum =
+ ip_incremental_checksum (0, igmp, sizeof (igmp_membership_query_v3_t));
+ csum = ~ip_csum_fold (sum);
+ igmp->header.checksum = csum;
+
+ b->current_data += sizeof (igmp_membership_query_v3_t);
+ b->current_length += sizeof (igmp_membership_query_v3_t);
+}
+
+
+static void
+igmp_create_ip4 (vlib_buffer_t * b, igmp_config_t * config, u8 is_report)
+{
+ ip_lookup_main_t *lm = &ip4_main.lookup_main;
+
+ ip4_header_t *ip4 = (ip4_header_t *) (vlib_buffer_get_current (b));
+ memset (ip4, 0, sizeof (ip4_header_t));
+ ip4->ip_version_and_header_length = 0x45;
+ ip4->ttl = 1;
+ ip4->protocol = 2;
+ ip4->tos = 0xc0;
+
+ u32 if_add_index =
+ lm->if_address_pool_index_by_sw_if_index[config->sw_if_index];
+ if (PREDICT_TRUE (if_add_index != ~0))
+ {
+ ip_interface_address_t *if_add =
+ pool_elt_at_index (lm->if_address_pool, if_add_index);
+ ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
+ clib_memcpy (&ip4->src_address, if_ip, sizeof (ip4_address_t));
+ }
+ ip4->dst_address.as_u8[0] = 224;
+ ip4->dst_address.as_u8[1] = 0;
+ ip4->dst_address.as_u8[2] = 0;
+ ip4->dst_address.as_u8[3] = is_report ? 22 : 1;
+
+ b->current_data += ip4_header_bytes (ip4);
+ b->current_length += ip4_header_bytes (ip4);
+
+ config->next_create_msg (b, config);
+ ip4->length = clib_host_to_net_u16 (b->current_length);
+
+ ip4->checksum = ip4_header_checksum (ip4);
+}
+
+static void
+igmp_send_msg (vlib_main_t * vm, vlib_node_runtime_t * node,
+ igmp_main_t * im, igmp_config_t * config, u8 is_report)
+{
+ u32 thread_index = vlib_get_thread_index ();
+ u32 *to_next;
+ u32 next_index = IGMP_NEXT_IP4_REWRITE_MCAST_NODE;
+
+ u32 n_free_bufs = vec_len (im->buffers[thread_index]);
+ if (PREDICT_FALSE (n_free_bufs < 1))
+ {
+ vec_validate (im->buffers[thread_index], 1 + n_free_bufs - 1);
+ n_free_bufs +=
+ vlib_buffer_alloc (vm, &im->buffers[thread_index][n_free_bufs], 1);
+ _vec_len (im->buffers[thread_index]) = n_free_bufs;
+ }
+
+ u32 n_left_to_next;
+ u32 next0 = next_index;
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ if (n_left_to_next > 0)
+ {
+ vlib_buffer_t *b = 0;
+ u32 bi = 0;
+
+ if (n_free_bufs)
+ {
+ u32 last_buf = vec_len (im->buffers[thread_index]) - 1;
+ bi = im->buffers[thread_index][last_buf];
+ b = vlib_get_buffer (vm, bi);
+ _vec_len (im->buffers[thread_index]) = last_buf;
+ n_free_bufs--;
+ if (PREDICT_FALSE (n_free_bufs == 0))
+ {
+ n_free_bufs += vlib_buffer_alloc (vm,
+ &im->buffers[thread_index]
+ [n_free_bufs], 1);
+ _vec_len (im->buffers[thread_index]) = n_free_bufs;
+ }
+
+ b->current_data = 0;
+ b->current_length = 0;
+
+ igmp_create_ip4 (b, config, is_report);
+
+ b->current_data = 0;
+
+ b->total_length_not_including_first_buffer = 0;
+ b->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
+ vnet_buffer (b)->sw_if_index[VLIB_RX] = (u32) ~ 0;
+ vnet_buffer (b)->ip.adj_index[VLIB_TX] = config->adj_index;
+ b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
+ }
+
+ to_next[0] = bi;
+ to_next += 1;
+ n_left_to_next -= 1;
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, bi, next0);
+ }
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+}
+
+void
+igmp_send_query (vlib_main_t * vm, vlib_node_runtime_t * rt, igmp_main_t * im,
+ igmp_timer_t * timer)
+{
+ igmp_config_t *config;
+
+ u32 sw_if_index = timer->sw_if_index;
+
+ pool_put (im->timers, timer);
+
+ config = igmp_config_lookup (im, sw_if_index);
+ if (!config)
+ return;
+
+ /* TODO: implement IGMPv2 */
+ config->next_create_msg = igmp_create_general_query_v3;
+ igmp_send_msg (vm, rt, im, config, /* is_report */ 0);
+
+ igmp_create_int_timer (vlib_time_now (vm) + IGMP_QUERY_TIMER, sw_if_index,
+ igmp_send_query);
+}
+
+void
+igmp_query_resp_exp (vlib_main_t * vm, vlib_node_runtime_t * rt,
+ igmp_main_t * im, igmp_timer_t * timer)
+{
+ igmp_config_t *config;
+
+ u32 sw_if_index = timer->sw_if_index;
+
+ pool_put (im->timers, timer);
+
+ config = igmp_config_lookup (im, sw_if_index);
+ if (!config)
+ return;
+ /* if report not reveived in max resp time clear igmp on interface */
+ if ((config->flags & IGMP_CONFIG_FLAG_QUERY_RESP_RECVED) == 0)
+ {
+ igmp_clear_config (config);
+ }
+}
+
+void
+igmp_send_report (vlib_main_t * vm, vlib_node_runtime_t * rt,
+ igmp_main_t * im, igmp_timer_t * timer)
+{
+ igmp_config_t *config;
+
+ u32 sw_if_index = timer->sw_if_index;
+
+ pool_put (im->timers, timer);
+
+ config = igmp_config_lookup (im, sw_if_index);
+ if (!config)
+ return;
+
+ if (config->flags & IGMP_CONFIG_FLAG_CAN_SEND_REPORT)
+ {
+ /* TODO: implement IGMPv2 and IGMPv1 */
+ config->next_create_msg = igmp_create_report_v32;
+ igmp_send_msg (vm, rt, im, config, /* is_report */ 1);
+ /* WIP: unset flag after all reports sent */
+ config->flags &= ~IGMP_CONFIG_FLAG_CAN_SEND_REPORT;
+ }
+}
+
+void
+igmp_send_state_changed (vlib_main_t * vm, vlib_node_runtime_t * rt,
+ igmp_main_t * im, igmp_timer_t * timer)
+{
+ igmp_config_t *config;
+ igmp_sg_t *sg;
+
+ pool_put (im->timers, timer);
+
+ config = vec_elt_at_index (im->configs, im->next_index.config_index);
+ sg = vec_elt_at_index (config->sg, im->next_index.sg_index);
+
+ config->next_create_msg = igmp_create_report_v31;
+ igmp_send_msg (vm, rt, im, config, /* is_report */ 1);
+
+
+ if (sg->group_type == IGMP_MEMBERSHIP_GROUP_change_to_filter_include)
+ {
+ sg->group_type = IGMP_MEMBERSHIP_GROUP_mode_is_filter_include;
+ }
+ else if (sg->group_type == IGMP_MEMBERSHIP_GROUP_block_old_sources)
+ {
+ /* remove API/CLI configured (S,G) */
+ hash_unset_mem (config->igmp_sg_by_key, sg->key);
+ clib_mem_free (sg->key);
+ pool_put (config->sg, sg);
+ if (pool_elts (config->sg) == 0)
+ {
+ hash_unset_mem (im->igmp_config_by_sw_if_index,
+ &config->sw_if_index);
+ pool_put (im->configs, config);
+ }
+ }
+
+}
+
+void
+igmp_sg_exp (vlib_main_t * vm, vlib_node_runtime_t * rt, igmp_main_t * im,
+ igmp_timer_t * timer)
+{
+ igmp_config_t *config;
+ igmp_sg_t *sg;
+
+ igmp_sg_key_t *key = (igmp_sg_key_t *) timer->data;
+
+ config = igmp_config_lookup (im, timer->sw_if_index);
+ if (!config)
+ goto done;
+ sg = igmp_sg_lookup (config, key);
+ if (!sg)
+ goto done;
+
+ /* check if this timer is valid */
+ if (timer->exp_time != sg->exp_time)
+ {
+ timer->exp_time = sg->exp_time;
+ igmp_sort_timers (im->timers);
+ return;
+ }
+
+ /* source timer expired, remove (S,G) */
+ igmp_listen (vm, 0, timer->sw_if_index, key->saddr, key->gaddr, 0);
+
+done:
+ pool_put (im->timers, timer);
+}
+
+static uword
+igmp_timer_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
+ vlib_frame_t * f)
+{
+ igmp_main_t *im = &igmp_main;
+ uword *event_data = 0, event_type;
+ f64 time_start;
+ u8 enabled = 0;
+ igmp_timer_t *timer = NULL;
+
+ while (1)
+ {
+ if (enabled)
+ vlib_process_wait_for_event_or_clock (vm,
+ timer->exp_time - time_start);
+ else
+ vlib_process_wait_for_event (vm);
+
+ time_start = vlib_time_now (vm);
+
+ event_type = vlib_process_get_events (vm, &event_data);
+ vec_reset_length (event_data);
+
+ if (event_type == IGMP_PROCESS_EVENT_UPDATE_TIMER)
+ goto next_timer;
+
+ DBG ("time: %f", vlib_time_now (vm));
+
+ /* timer expired */
+ timer->func (vm, rt, im, timer);
+
+ next_timer:
+ timer = igmp_get_next_timer (im);
+ if (timer == NULL)
+ enabled = 0;
+ else
+ enabled = 1;
+ }
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (igmp_timer_process_node) =
+{
+ .function = igmp_timer_process,
+ .type = VLIB_NODE_TYPE_PROCESS,
+ .name = "igmp-timer-process",
+ .n_next_nodes = IGMP_N_NEXT,
+ .next_nodes = {
+ [IGMP_NEXT_IP4_REWRITE_MCAST_NODE] = "ip4-rewrite-mcast",
+ [IGMP_NEXT_IP6_REWRITE_MCAST_NODE] = "ip6-rewrite-mcast",
+ }
+};
+/* *INDENT-ON* */
+
+int
+igmp_listen (vlib_main_t * vm, u8 enable, u32 sw_if_index,
+ ip46_address_t saddr, ip46_address_t gaddr,
+ u8 cli_api_configured)
+{
+ igmp_main_t *im = &igmp_main;
+ igmp_config_t *config;
+ igmp_sg_t *sg;
+ igmp_sg_key_t key;
+ int rv = 0;
+
+ /* set the lookup key */
+ clib_memcpy (&key.saddr, &saddr, sizeof (ip46_address_t));
+ clib_memcpy (&key.gaddr, &gaddr, sizeof (ip46_address_t));
+
+ if (enable)
+ {
+ config = igmp_config_lookup (im, sw_if_index);
+ if (!config)
+ {
+ pool_get (im->configs, config);
+ memset (config, 0, sizeof (igmp_config_t));
+ config->sw_if_index = sw_if_index;
+ config->igmp_sg_by_key =
+ hash_create_mem (0, sizeof (igmp_sg_key_t), sizeof (uword));
+ config->cli_api_configured = cli_api_configured;
+ /* use IGMPv3 by default */
+ config->igmp_ver = IGMP_V3;
+ config->robustness_var = IGMP_DEFAULT_ROBUSTNESS_VARIABLE;
+ config->flags |= IGMP_CONFIG_FLAG_QUERY_RESP_RECVED;
+ if (!cli_api_configured)
+ {
+ igmp_create_int_timer (vlib_time_now (vm) + IGMP_QUERY_TIMER,
+ sw_if_index, igmp_send_query);
+ }
+ config->adj_index =
+ adj_mcast_add_or_lock (FIB_PROTOCOL_IP4, VNET_LINK_IP4,
+ config->sw_if_index);
+ hash_set_mem (im->igmp_config_by_sw_if_index, &config->sw_if_index,
+ config - im->configs);
+ }
+ else if (config->cli_api_configured != cli_api_configured)
+ {
+ rv = -2;
+ goto error;
+ }
+ sg = igmp_sg_lookup (config, &key);
+ if (!sg)
+ {
+ pool_get (config->sg, sg);
+ memset (sg, 0, sizeof (igmp_sg_t));
+ sg->key = clib_mem_alloc (sizeof (igmp_sg_key_t));
+ clib_memcpy (sg->key, &key, sizeof (igmp_sg_key_t));
+ clib_memcpy (&sg->saddr, &saddr, sizeof (ip46_address_t));
+ clib_memcpy (&sg->gaddr, &gaddr, sizeof (ip46_address_t));
+ sg->group_type = IGMP_MEMBERSHIP_GROUP_change_to_filter_include;
+ if (cli_api_configured)
+ {
+ /* create state-changed report timer with zero timeout */
+ igmp_create_int_timer (0, sw_if_index, igmp_send_state_changed);
+ }
+ else
+ {
+ sg->group_type = IGMP_MEMBERSHIP_GROUP_mode_is_filter_include;
+ sg->exp_time = vlib_time_now (vm) + IGMP_SG_TIMER;
+ igmp_create_sg_timer (sg->exp_time, config->sw_if_index,
+ sg->key, igmp_sg_exp);
+ /* notify all registered api clients */
+ igmp_event (im, config, sg);
+ }
+ hash_set_mem (config->igmp_sg_by_key, sg->key, sg - config->sg);
+ }
+ else
+ {
+ rv = -1;
+ goto error;
+ }
+
+ im->next_index.config_index = config - im->configs;
+ im->next_index.sg_index = sg - config->sg;
+ }
+ else
+ {
+ config = igmp_config_lookup (im, sw_if_index);
+ if (config)
+ {
+ sg = igmp_sg_lookup (config, &key);
+ if (sg)
+ {
+ sg->group_type = IGMP_MEMBERSHIP_GROUP_block_old_sources;
+ im->next_index.config_index = config - im->configs;
+ im->next_index.sg_index = sg - config->sg;
+ /* notify all registered api clients */
+ if (!cli_api_configured)
+ igmp_event (im, config, sg);
+ else
+ igmp_create_int_timer (0, sw_if_index,
+ igmp_send_state_changed);
+ }
+ else
+ {
+ rv = -1;
+ goto error;
+ }
+ }
+ else
+ {
+ rv = -1;
+ goto error;
+ }
+ }
+
+error:
+ return rv;
+}
+
+static clib_error_t *
+igmp_hw_interface_link_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
+{
+ igmp_main_t *im = &igmp_main;
+ igmp_config_t *config;
+ clib_error_t *error = NULL;
+
+ /* remove igmp from a down interface to prevent crashes... */
+ config =
+ igmp_config_lookup (im,
+ vnet_get_hw_interface (vnm,
+ hw_if_index)->sw_if_index);
+ if (config)
+ {
+ if ((flags & VNET_HW_INTERFACE_FLAG_LINK_UP) == 0)
+ igmp_clear_config (config);
+ }
+ return error;
+}
+
+VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION (igmp_hw_interface_link_up_down);
+
+static clib_error_t *
+igmp_init (vlib_main_t * vm)
+{
+ igmp_main_t *im = &igmp_main;
+ vlib_thread_main_t *tm = vlib_get_thread_main ();
+ int i;
+
+
+ im->igmp_config_by_sw_if_index =
+ hash_create_mem (0, sizeof (u32), sizeof (uword));
+ im->igmp_api_client_by_client_index =
+ hash_create_mem (0, sizeof (u32), sizeof (uword));
+
+ vec_validate_aligned (im->buffers, tm->n_vlib_mains - 1,
+ CLIB_CACHE_LINE_BYTES);
+
+ ip4_register_protocol (IP_PROTOCOL_IGMP, igmp_input_node.index);
+
+ igmp_type_info_t *ti;
+ igmp_report_type_info_t *rti;
+#define igmp_type(n,s) \
+do { \
+ vec_add2 (im->type_infos, ti, 1); \
+ ti->type = n; \
+ ti->name = (u8 *) #s; \
+} while (0);
+
+#define igmp_report_type(n,s) \
+do { \
+ vec_add2 (im->report_type_infos, rti, 1); \
+ rti->type = n; \
+ rti->name = (u8 *) #s; \
+} while (0);
+
+#include "igmp.def"
+
+#undef igmp_type
+#undef igmp_report_type
+
+ for (i = 0; i < vec_len (im->type_infos); i++)
+ {
+ ti = im->type_infos + i;
+ hash_set (im->type_info_by_type, ti->type, i);
+ }
+
+ for (i = 0; i < vec_len (im->report_type_infos); i++)
+ {
+ rti = im->report_type_infos + i;
+ hash_set (im->report_type_info_by_report_type, rti->type, i);
+ }
+
+ /* General Query address */
+ ip46_address_t addr0;
+ addr0.ip4.as_u8[0] = 224;
+ addr0.ip4.as_u8[1] = 0;
+ addr0.ip4.as_u8[2] = 0;
+ addr0.ip4.as_u8[3] = 1;
+ /* Report address */
+ ip46_address_t addr1;
+ addr1.ip4.as_u8[0] = 224;
+ addr1.ip4.as_u8[1] = 0;
+ addr1.ip4.as_u8[2] = 0;
+ addr1.ip4.as_u8[3] = 22;
+
+ fib_route_path_t path = {
+ .frp_proto = fib_proto_to_dpo (FIB_PROTOCOL_IP4),
+ .frp_addr = zero_addr,
+ .frp_sw_if_index = 0xffffffff,
+ .frp_fib_index = 0,
+ .frp_weight = 0,
+ .frp_flags = FIB_ROUTE_PATH_LOCAL,
+ };
+ const mfib_prefix_t mpfx0 = {
+ .fp_proto = FIB_PROTOCOL_IP4,
+ .fp_len = 32,
+ .fp_grp_addr = addr0,
+ };
+ const mfib_prefix_t mpfx1 = {
+ .fp_proto = FIB_PROTOCOL_IP4,
+ .fp_len = 32,
+ .fp_grp_addr = addr1,
+ };
+ /* configure MFIB to accept IGMPv3 general query and reports from all interfaces */
+ mfib_table_entry_path_update (0, &mpfx0, MFIB_SOURCE_DEFAULT_ROUTE, &path,
+ MFIB_ITF_FLAG_FORWARD);
+ mfib_table_entry_path_update (0, &mpfx1, MFIB_SOURCE_DEFAULT_ROUTE, &path,
+ MFIB_ITF_FLAG_FORWARD);
+
+ mfib_table_entry_update (0, &mpfx0, MFIB_SOURCE_DEFAULT_ROUTE, 0,
+ MFIB_ENTRY_FLAG_ACCEPT_ALL_ITF);
+ mfib_table_entry_update (0, &mpfx1, MFIB_SOURCE_DEFAULT_ROUTE, 0,
+ MFIB_ENTRY_FLAG_ACCEPT_ALL_ITF);
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (igmp_init);
+
+/* *INDENT-OFF* */
+VLIB_PLUGIN_REGISTER () = {
+ .version = VPP_BUILD_VER,
+ .description = "IGMP messaging",
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */