add functionality

Signed-off-by: Paul Schroeder <milkpirate@users.noreply.github.com>

common.c

@@ -319,6 +319,11 @@ int connect_addr(struct connection *cnx, int fd_from, connect_blocking blocking)
     res = getpeername(fd_from, from.ai_addr, &from.ai_addrlen);
     CHECK_RES_RETURN(res, "getpeername", res);
 
+    if (cfg.protocols.resolve_on_forward) {
+        resolve_split_name(&(cnx->proto->saddr), cnx->proto->host,
+                           cnx->proto->port);
+    }
+
     for (a = cnx->proto->saddr; a; a = a->ai_next) {
         /* When transparent, make sure both connections use the same address family */
         if (transparent && a->ai_family != from.ai_addr->sa_family)

sslh-main.c

@@ -124,8 +124,13 @@ static void config_protocols()
     int i;
     for (i = 0; i < cfg.protocols_len; i++) {
         struct sslhcfg_protocols_item* p = &(cfg.protocols[i]);
-        if (resolve_split_name(&(p->saddr), p->host, p->port)) {
-            print_message(msg_config_error, "cannot resolve %s:%s\n", p->host, p->port);
+
+        if (
+            !cfg.protocols.resolve_on_forward &&
+            resolve_split_name(&(p->saddr), p->host, p->port)
+        ) {
+            print_message(msg_config_error, "cannot resolve %s:%s\n",
+                          p->host, p->port);
             exit(4);
         }