From b00a17059a6b6a23cbdb5168b4fbee29b66fb5a8 Mon Sep 17 00:00:00 2001
From: sg <goldsimon@gmx.de>
Date: Sat, 5 Mar 2016 15:57:40 +0100
Subject: [PATCH] fixed icmp_send_response with LWIP_HOOK_IP4_ROUTE_SRC enabled

---
 src/core/ipv4/icmp.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/core/ipv4/icmp.c b/src/core/ipv4/icmp.c
index b7228538..9202bb65 100644
--- a/src/core/ipv4/icmp.c
+++ b/src/core/ipv4/icmp.c
@@ -360,7 +360,15 @@ icmp_send_response(struct pbuf *p, u8_t type, u8_t code)
           IP_HLEN + ICMP_DEST_UNREACH_DATASIZE);
 
   ip4_addr_copy(iphdr_src, iphdr->src);
+#ifdef LWIP_HOOK_IP4_ROUTE_SRC
+  {
+    ip4_addr_t iphdr_dst;
+    ip4_addr_copy(iphdr_dst, iphdr->dest);
+    netif = ip4_route_src(&iphdr_src, &iphdr_dst);
+  }
+#else
   netif = ip4_route(&iphdr_src);
+#endif
   if (netif != NULL) {
     /* calculate checksum */
     icmphdr->chksum = 0;