From: Guus Sliepen <guus@meshlink.io>
Date: Thu, 27 Jul 2017 08:50:23 +0000 (+0200)
Subject: If binding to the configured port fails, ask the OS to provide a port.
X-Git-Url: https://git.meshlink.io/?a=commitdiff_plain;h=5da2857e6c1e017d1863d94a4703ac26011c0e1f;p=meshlink

If binding to the configured port fails, ask the OS to provide a port.

This will still allow MeshLink to make outgoing connections to other
nodes.
---

diff --git a/src/net_setup.c b/src/net_setup.c
index 8cfacc3a..fb0cf8d0 100644
--- a/src/net_setup.c
+++ b/src/net_setup.c
@@ -390,8 +390,19 @@ bool setup_myself(meshlink_handle_t *mesh) {
 
 	mesh->listen_sockets = 0;
 
-	if(!add_listen_address(mesh, address, NULL))
-		return false;
+	if(!add_listen_address(mesh, address, NULL)) {
+		if(!strcmp(mesh->myport, "0")) {
+			logger(mesh, MESHLINK_WARNING, "Could not bind to port %s, asking OS to choose one for us", mesh->myport);
+			free(mesh->myport);
+			mesh->myport = strdup("0");
+			if(!mesh->myport)
+				return false;
+			if(!add_listen_address(mesh, address, NULL))
+				return false;
+		} else {
+			return false;
+		}
+	}
 
 	if(!mesh->listen_sockets) {
 		logger(mesh, MESHLINK_ERROR, "Unable to create any listening socket!");