fix bin crash if no listener defined

When using usrloc and dialog replication, if no bin_listen is defined,
OpenSIPS crashes. This fix ensures that if there are any replication
destinations defined, the binary listener exists.

Thanks go to Stas Kobzar for reporting this
Closes #652

bin_interface.c

@@ -257,6 +257,11 @@ int bin_send(union sockaddr_union *dest)
 	int rc, destlen;
 	str st;
 
+	if (!bin) {
+		LM_ERR("binary listener not defined - cannot replicate!\n");
+		return -1;
+	}
+
 	if (!dest)
 		return 0;
 

modules/dialog/dialog.c

@@ -889,6 +889,12 @@ static int mod_init(void)
 	mark_dlg_loaded_callbacks_run();
 	destroy_cachedb(0);
 
+	if (replication_dests && !bin) {
+		LM_ERR("You are using dialog replication, but there "
+				"is no bin_listen parameter defined!\n");
+		return -1;
+	}
+
 	return 0;
 }
 

modules/usrloc/ul_mod.c

@@ -348,6 +348,12 @@ static int mod_init(void)
 		return -1;
 	}
 
+	if (replication_dests && !bin) {
+		LM_ERR("You are using contacts replication, but there "
+				"is no bin_listen parameter defined!\n");
+		return -1;
+	}
+
 	init_flag = 1;
 
 	return 0;