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, 162 insertions, 0 deletions

diff --git a/src/plugins/igmp/igmp_ssm_range.c b/src/plugins/igmp/igmp_ssm_range.c
new file mode 100644
index 00000000000..3d12712d3db
--- /dev/null
+++ b/src/plugins/igmp/igmp_ssm_range.c
@@ -0,0 +1,162 @@
+/*
+ *------------------------------------------------------------------
+ * 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 <igmp/igmp_ssm_range.h>
+
+typedef struct igmp_group_prefix_t
+{
+  fib_prefix_t igp_prefix;
+  igmp_group_prefix_type_t igp_type;
+} igmp_group_prefix_t;
+
+static igmp_group_prefix_t *igmp_group_prefixs;
+
+u8 *
+format_igmp_group_prefix_type (u8 * s, va_list * args)
+{
+  igmp_group_prefix_type_t type = va_arg (*args, int);
+
+  switch (type)
+    {
+#define _(n,f) case IGMP_GROUP_PREFIX_TYPE_##f: return (format (s, "%s", #f));
+      foreach_igmp_group_prefix_type
+#undef _
+    }
+  return format (s, "unknown:%d", type);
+}
+
+static int
+igmp_group_prefix_cmp (const igmp_group_prefix_t * gp1,
+		       const fib_prefix_t * p)
+{
+  return (fib_prefix_cmp (&gp1->igp_prefix, p));
+}
+
+void
+igmp_group_prefix_set (const fib_prefix_t * pfx,
+		       igmp_group_prefix_type_t type)
+{
+  u32 pos;
+
+  pos =
+    vec_search_with_function (igmp_group_prefixs, pfx, igmp_group_prefix_cmp);
+
+  if ((~0 == pos) && (IGMP_GROUP_PREFIX_TYPE_SSM == type))
+    {
+      igmp_group_prefix_t gp = {
+	.igp_prefix = *pfx,
+	.igp_type = type,
+      };
+
+      vec_add1 (igmp_group_prefixs, gp);
+    }
+  if ((~0 != pos) && (IGMP_GROUP_PREFIX_TYPE_ASM == type))
+    {
+      vec_del1 (igmp_group_prefixs, pos);
+    }
+}
+
+static void
+igmp_ssm_range_populate (void)
+{
+  igmp_group_prefix_t *ssm_default;
+
+  vec_add2 (igmp_group_prefixs, ssm_default, 1);
+
+  ssm_default->igp_prefix.fp_addr.ip4.as_u32 = IGMP_SSM_DEFAULT;
+  ssm_default->igp_prefix.fp_proto = FIB_PROTOCOL_IP4;
+  ssm_default->igp_prefix.fp_len = 8;
+  ssm_default->igp_type = IGMP_GROUP_PREFIX_TYPE_SSM;
+}
+
+igmp_group_prefix_type_t
+igmp_group_prefix_get_type (const ip46_address_t * gaddr)
+{
+  igmp_group_prefix_t *igp;
+
+  vec_foreach (igp, igmp_group_prefixs)
+  {
+    if (ip4_destination_matches_route (&ip4_main,
+				       &gaddr->ip4,
+				       &igp->igp_prefix.fp_addr.ip4,
+				       igp->igp_prefix.fp_len))
+      return (IGMP_GROUP_PREFIX_TYPE_SSM);
+  }
+
+  return (IGMP_GROUP_PREFIX_TYPE_ASM);
+}
+
+void
+igmp_ssm_range_walk (igmp_ssm_range_walk_t fn, void *ctx)
+{
+  igmp_group_prefix_t *igp;
+
+  vec_foreach (igp, igmp_group_prefixs)
+  {
+    if (WALK_STOP == fn (&igp->igp_prefix, igp->igp_type, ctx))
+      break;
+  }
+}
+
+static clib_error_t *
+igmp_ssm_range_show (vlib_main_t * vm,
+		     unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+  igmp_group_prefix_t *igp;
+
+  vec_foreach (igp, igmp_group_prefixs)
+  {
+    vlib_cli_output (vm, "%U => %U",
+		     format_fib_prefix, &igp->igp_prefix,
+		     format_igmp_group_prefix_type, igp->igp_type);
+  }
+  return (NULL);
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (igmp_show_timers_command, static) = {
+  .path = "show igmp ssm-ranges",
+  .short_help = "show igmp ssm-ranges",
+  .function = igmp_ssm_range_show,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+igmp_ssm_range_init (vlib_main_t * vm)
+{
+  clib_error_t *error;
+
+  if ((error = vlib_call_init_function (vm, igmp_init)))
+    return error;
+
+  igmp_ssm_range_populate ();
+
+  IGMP_DBG ("ssm-range-initialized");
+
+  return (error);
+}
+
+VLIB_INIT_FUNCTION (igmp_ssm_range_init);
+
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */