From 940461de1806bbffbfe6f8e12b18171c39f52648 Mon Sep 17 00:00:00 2001
From: Yves Rutschle <git1@rutschle.net>
Date: Fri, 5 Jan 2024 11:15:53 +0100
Subject: [PATCH] check name resolution error to avoid segfault

---
 udp-listener.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/udp-listener.c b/udp-listener.c
index bc7a3f4..d3f5590 100644
--- a/udp-listener.c
+++ b/udp-listener.c
@@ -225,13 +225,16 @@ static void mark_active(struct connection* cnx)
 /* Creates a new non-blocking socket */
 static int nonblocking_socket(struct sslhcfg_protocols_item* proto)
 {
+    int res;
+
     if (proto->resolve_on_forward) {
-        resolve_split_name(&(proto->saddr), proto->host,
-                           proto->port);
+        res = resolve_split_name(&(proto->saddr), proto->host,
+                                 proto->port);
+        if (res) return -1;
     }
 
     int out = socket(proto->saddr->ai_family, SOCK_DGRAM, 0);
-    int res = set_nonblock(out);
+    res = set_nonblock(out);
     if (res == -1) {
         print_message(msg_system_error, "%s:%d:%s:%d:%s\n", __FILE__, __LINE__, "udp:socket:nonblock", errno, strerror(errno));
         close(out);