Pass along and use the actual port we're listening on for peers.exchange.

src/ssb.c

@@ -3031,6 +3031,21 @@ int tf_ssb_server_open(tf_ssb_t* ssb, int port)
 	return status == 0 ? assigned_port : 0;
 }
 
+int tf_ssb_server_get_port(tf_ssb_t* ssb)
+{
+	int port = 0;
+	if (ssb && ssb->server.data)
+	{
+		struct sockaddr_storage name = { 0 };
+		int size = (int)sizeof(name);
+		if (uv_tcp_getsockname(&ssb->server, (struct sockaddr*)&name, &size) == 0)
+		{
+			port = ntohs(((struct sockaddr_in*)&name)->sin_port);
+		}
+	}
+	return port;
+}
+
 void tf_ssb_server_close(tf_ssb_t* ssb)
 {
 	if (ssb->server.data && !uv_is_closing((uv_handle_t*)&ssb->server))

src/ssb.h

@@ -364,6 +364,13 @@ void tf_ssb_connect_str(tf_ssb_t* ssb, const char* address);
 */
 int tf_ssb_server_open(tf_ssb_t* ssb, int port);
 
+/**
+** Determine the port that a server is listening on.
+** @param ssb The SSB instance.
+** @return The port number, or 0 if not bound.
+*/
+int tf_ssb_server_get_port(tf_ssb_t* ssb);
+
 /**
 ** Stop listening for SHS connections.
 ** @param ssb The SSB instance.

src/ssb.rpc.c

@@ -1429,8 +1429,13 @@ static void _tf_ssb_rpc_peers_exchange_internal(
 			*dot = '\0';
 		}
 
+		int port = tf_ssb_connection_get_port(connection);
+		JSValue port_value = JS_GetPropertyStr(context, args, "port");
+		JS_ToInt32(context, &port, port_value);
+		JS_FreeValue(context, port_value);
+
 		char connection_string[1024] = { 0 };
-		snprintf(connection_string, sizeof(connection_string), "net:%s:%d~shs:%s", tf_ssb_connection_get_host(connection), tf_ssb_connection_get_port(connection), fullid + 1);
+		snprintf(connection_string, sizeof(connection_string), "net:%s:%d~shs:%s", tf_ssb_connection_get_host(connection), port, fullid + 1);
 		tf_ssb_add_broadcast(ssb, connection_string, k_tf_ssb_broadcast_origin_peer_exchange, k_ssb_peer_exchange_expires_seconds);
 	}
 
@@ -1478,6 +1483,7 @@ static void _tf_ssb_rpc_send_peers_exchange(tf_ssb_connection_t* connection)
 	JS_SetPropertyUint32(context, name, 1, JS_NewString(context, "exchange"));
 	JS_SetPropertyStr(context, message, "name", name);
 	tf_ssb_t* ssb = tf_ssb_connection_get_ssb(connection);
+	JS_SetPropertyStr(context, message, "port", JS_NewInt32(context, tf_ssb_server_get_port(ssb)));
 	JS_SetPropertyStr(context, message, "peers", _tf_ssb_get_peers_exchange(ssb));
 	tf_ssb_connection_rpc_send_json(connection, k_ssb_rpc_flag_new_request, request_number, "peers.exchange", message, _tf_ssb_rpc_peers_exchange_internal, NULL, NULL);
 	JS_FreeValue(context, message);