From 8f8f56914bc80655a1ce88d93513f934434f0ee2 Mon Sep 17 00:00:00 2001
From: Dirk Ziegelmeier <dirk@ziegelmeier.net>
Date: Sat, 1 Oct 2016 21:27:00 +0200
Subject: [PATCH] Fix bug #47731: IGMP state transition missing Set state
 variable according to RFC 2236 on timeout in delaying member state

---
 src/core/ipv4/igmp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/core/ipv4/igmp.c b/src/core/ipv4/igmp.c
index 45388aa7..79ba690d 100644
--- a/src/core/ipv4/igmp.c
+++ b/src/core/ipv4/igmp.c
@@ -665,6 +665,8 @@ igmp_timeout(struct netif *netif, struct igmp_group *group)
     ip4_addr_debug_print(IGMP_DEBUG, &(group->group_address));
     LWIP_DEBUGF(IGMP_DEBUG, (" on if %p\n", (void*)netif));
 
+    group->group_state = IGMP_GROUP_IDLE_MEMBER;
+    
     IGMP_STATS_INC(igmp.tx_report);
     igmp_send(netif, group, IGMP_V2_MEMB_REPORT);
   }