From 688d276340b17f4449b9afe3838291fb8efa5f42 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Beno=C3=AEt=20Ganne?= <bganne@cisco.com>
Date: Mon, 7 Feb 2022 18:07:39 +0100
Subject: [PATCH] igmp: make sure fib_index is set before delivering to
 ip4-local
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IGMP packets with Router Alert option are delivered to ip4-local
without going through ip4-lookup. Make sure fib_index is initialized
properly.

Type: fix

Change-Id: Iab090a33c4c759b6d7f68c28a0b3f4da7a9de864
Signed-off-by: Benoît Ganne <bganne@cisco.com>
---
 src/vnet/ip/ip4_options.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/vnet/ip/ip4_options.c b/src/vnet/ip/ip4_options.c
index 1b5a7878512..9b01151a1f0 100644
--- a/src/vnet/ip/ip4_options.c
+++ b/src/vnet/ip/ip4_options.c
@@ -82,6 +82,8 @@ VLIB_NODE_FN (ip4_options_node) (vlib_main_t * vm,
 	       */
 	      if (IP_PROTOCOL_IGMP == ip4->protocol)
 		{
+		  ip_lookup_set_buffer_fib_index (
+		    ip4_main.fib_index_by_sw_if_index, b);
 		  next = IP4_OPTIONS_NEXT_LOCAL;
 		}
 	      break;
-- 
2.16.6