topoh: safety check to avoid crash when there is no via header

- based on GH #952
kamailio · Jan 27, 2017 · 2367fb5 · 2367fb5
1 parent d51c710
commit 2367fb5
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/modules/topoh/th_msg.c b/src/modules/topoh/th_msg.c
@@ -954,6 +954,10 @@ int th_add_hdr_cookie(sip_msg_t *msg)
 struct via_param *th_get_via_cookie(sip_msg_t *msg, struct via_body *via)
 {
 	struct via_param *p;
+
+	if (!via) {
+		return NULL;
+	}
 	for(p=via->param_lst; p; p=p->next)
 	{
 		if(p->name.len==th_cookie_name.len