From 59e263c97571a000a8a854d8e36ad9cad33d13de Mon Sep 17 00:00:00 2001
From: Daniel-Constantin Mierla <miconda@gmail.com>
Date: Sat, 22 Jul 2017 08:34:01 +0200
Subject: [PATCH] nat_traversal: handle return values for errors

(cherry picked from commit 449d435194338a4f3acf079774adcbef7ad7b794)
---
 src/modules/nat_traversal/nat_traversal.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/modules/nat_traversal/nat_traversal.c b/src/modules/nat_traversal/nat_traversal.c
index 8bd4adde654..d3c6c950576 100644
--- a/src/modules/nat_traversal/nat_traversal.c
+++ b/src/modules/nat_traversal/nat_traversal.c
@@ -1573,6 +1573,10 @@ send_keepalive(NAT_Contact *contact)
     lport = 0;
     lproto = PROTO_NONE;
     hostent = sip_resolvehost(&nat_ip, &lport, &lproto);
+    if(hostent==NULL) {
+        LM_ERR("sip resolve host failed\n");
+        return;
+    }
     hostent2su(&dst.to, hostent, 0, nat_port);
 	dst.proto=PROTO_UDP;
 	dst.send_sock=contact->socket;
@@ -1900,7 +1904,9 @@ reply_filter(struct sip_msg *reply)
     static str prefix = {NULL, 0};
     str call_id;
 
-    parse_headers(reply, HDR_VIA2_F, 0);
+    if(parse_headers(reply, HDR_VIA2_F, 0)<0) {
+        LM_DBG("second via not parsed\n");
+    }
     if (reply->via2)
         return 1;