.gitignore tags file,

.gitignore

@@ -1,6 +1,6 @@
 build/
 .sconsign.dblite
 *.swp
-/tags
+tags
 doc/
 log_subdir/

test/udp_heartbeat.c

@@ -256,18 +256,20 @@ int main(int argc, char *argv[])
     uint16_t local_port = 23456;
     uint16_t remote_port = 23456;
     int c;
+    struct uc_log_destination *dest;
 
     srand(getpid());
 
     uc_log_init(&log_modules);
-    uc_log_add_destination(uc_log_new_stderr(UC_LL_DEBUG, 1));
+    dest = uc_log_new_stderr(UC_LL_DEBUG, 1);
+    uc_log_add_destination(dest);
 
     mux = iomux_create(IOMUX_TYPE_DEFAULT);
     ctx.mux = mux;
 
     init_hb_context(&ctx, local_port);
 
-    while ((c = getopt(argc, argv, "p:P:a:")) != -1) {
+    while ((c = getopt(argc, argv, "m:p:P:a:")) != -1) {
         switch (c) {
         case 'p':
             local_port = atoi(optarg);
@@ -278,6 +280,9 @@ int main(int argc, char *argv[])
         case 'a':
             peer_add(&ctx, optarg, remote_port);
             break;
+        case 'm':
+            uc_log_destination_set_mask(dest, optarg);
+            break;
         default:
             printf("Unknown option -%c\n", c);
             return 1;