IGMP improvements

- Enable/Disable an interface for IGMP
- improve logging
- refactor common code
- no orphaned timers
- IGMP state changes in main thread only
- Large groups split over multiple state-change reports
- SSM range configuration API.
- more tests

Change-Id: If5674f1044e7e97274a711f47807c9ba689d7b9a
Signed-off-by: Neale Ranns <nranns@cisco.com>

1 files changed, 151 insertions, 0 deletions

diff --git a/src/plugins/igmp/igmp_src.c b/src/plugins/igmp/igmp_src.c
new file mode 100644
index 00000000000..5e6b6092df4
--- /dev/null
+++ b/src/plugins/igmp/igmp_src.c
@@ -0,0 +1,151 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2018 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 <igmp/igmp_src.h>
+#include <igmp/igmp_group.h>
+#include <igmp/igmp.h>
+
+void
+igmp_src_free (igmp_src_t * src)
+{
+  igmp_main_t *im = &igmp_main;
+
+  IGMP_DBG ("free-src: (%U)", format_igmp_key, src->key);
+
+  igmp_timer_retire (&src->timers[IGMP_SRC_TIMER_EXP]);
+
+  clib_mem_free (src->key);
+  pool_put (im->srcs, src);
+}
+
+static void
+igmp_src_exp (u32 obj, void *dat)
+{
+  igmp_group_t *group;
+  igmp_src_t *src;
+
+  src = pool_elt_at_index (igmp_main.srcs, obj);
+  group = igmp_group_get (src->group);
+
+  IGMP_DBG ("src-exp: %U", format_igmp_key, src->key);
+
+  igmp_timer_retire (&src->timers[IGMP_SRC_TIMER_EXP]);
+
+  if (IGMP_MODE_ROUTER == src->mode)
+    {
+      igmp_config_t *config;
+      igmp_group_t *group;
+
+      /*
+       * inform interest parties
+       */
+      group = igmp_group_get (src->group);
+      config = igmp_config_get (group->config);
+
+      igmp_event (IGMP_FILTER_MODE_EXCLUDE,
+		  config->sw_if_index, src->key, group->key);
+    }
+
+  igmp_group_src_remove (group, src);
+  igmp_src_free (src);
+
+  if (0 == igmp_group_n_srcs (group, IGMP_FILTER_MODE_INCLUDE))
+    igmp_group_clear (group);
+}
+
+igmp_src_t *
+igmp_src_alloc (u32 group_index, const igmp_key_t * skey, igmp_mode_t mode)
+{
+  igmp_main_t *im = &igmp_main;
+  igmp_src_t *src;
+
+  IGMP_DBG ("new-src: (%U)", format_igmp_key, skey);
+
+  pool_get (im->srcs, src);
+  memset (src, 0, sizeof (igmp_src_t));
+  src->mode = mode;
+  src->key = clib_mem_alloc (sizeof (*skey));
+  src->group = group_index;
+  clib_memcpy (src->key, skey, sizeof (*skey));
+
+  if (IGMP_MODE_ROUTER == mode)
+    {
+      igmp_config_t *config;
+      igmp_group_t *group;
+      /*
+       * start a timer that determines whether the source is still
+       * active o nthe link
+       */
+      src->timers[IGMP_SRC_TIMER_EXP] =
+	igmp_timer_schedule (igmp_timer_type_get (IGMP_TIMER_SRC),
+			     src - im->srcs, igmp_src_exp, NULL);
+
+      /*
+       * inform interest parties
+       */
+      group = igmp_group_get (src->group);
+      config = igmp_config_get (group->config);
+
+      igmp_event (IGMP_FILTER_MODE_INCLUDE,
+		  config->sw_if_index, src->key, group->key);
+    }
+  else
+    {
+      src->timers[IGMP_SRC_TIMER_EXP] = IGMP_TIMER_ID_INVALID;
+    }
+
+  return (src);
+}
+
+void
+igmp_src_refresh (igmp_src_t * src)
+{
+  IGMP_DBG ("refresh-src: (%U)", format_igmp_key, src->key);
+
+  igmp_timer_retire (&src->timers[IGMP_SRC_TIMER_EXP]);
+
+  src->timers[IGMP_SRC_TIMER_EXP] =
+    igmp_timer_schedule (igmp_timer_type_get (IGMP_TIMER_SRC),
+			 igmp_src_index (src), igmp_src_exp, NULL);
+}
+
+void
+igmp_src_blocked (igmp_src_t * src)
+{
+  IGMP_DBG ("block-src: (%U)", format_igmp_key, src->key);
+
+  igmp_timer_retire (&src->timers[IGMP_SRC_TIMER_EXP]);
+
+  src->timers[IGMP_SRC_TIMER_EXP] =
+    igmp_timer_schedule (igmp_timer_type_get (IGMP_TIMER_LEAVE),
+			 igmp_src_index (src), igmp_src_exp, NULL);
+}
+
+u32
+igmp_src_index (igmp_src_t * src)
+{
+  return (src - igmp_main.srcs);
+}
+
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */