1 files changed, 8 insertions, 2 deletions

diff --git a/src/ot_config.c b/src/ot_config.c
index 95136b5..6b51c61 100644
--- a/src/ot_config.c
+++ b/src/ot_config.c
@@ -208,6 +208,7 @@ typedef enum {
     CONFIG_TRACKER_REDIRECT_URL,
     CONFIG_LIVESYNC_CLUSTER_NODE_IP,
     CONFIG_LIVESYNC_CLUSTER_LISTEN,
+    CONFIG_LIVESYNC_CLUSTER_GROUP,
 } config_kind;
 
 typedef struct {
@@ -247,6 +248,7 @@ static const config_key config_keys[] = {
 #ifdef WANT_SYNC_LIVE
     CONFIG_KEY("livesync.cluster.node_ip", CONFIG_LIVESYNC_CLUSTER_NODE_IP),
     CONFIG_KEY("livesync.cluster.listen",  CONFIG_LIVESYNC_CLUSTER_LISTEN),
+    CONFIG_KEY("livesync.cluster.group",   CONFIG_LIVESYNC_CLUSTER_GROUP),
 #endif
 };
 static const size_t config_entry_count = sizeof(config_keys) / sizeof(config_keys[0]);
@@ -318,7 +320,7 @@ static int parse_configfile(char *config_filename) {
         int off     = scan_ip6_port(p, tmpip, &tmpport);
 
         if (!off || !listen_scan_options(p + off, &shared, &workers))
-          goto parse_error;
+          exerr("listen.tcp, listen.udp and listen.tcp_udp want an address, optionally a port and options.");
         if (kind != CONFIG_LISTEN_UDP)
           listen_append(tmpip, tmpport, FLAG_TCP, shared, workers), ++bound;
         if (kind != CONFIG_LISTEN_TCP)
@@ -378,6 +380,10 @@ static int parse_configfile(char *config_filename) {
         set_config_option(&g_redirecturl, p);
         break;
 #ifdef WANT_SYNC_LIVE
+      case CONFIG_LIVESYNC_CLUSTER_GROUP:
+        if (!ip_parse(p, tmpip) || livesync_set_group(tmpip) == -1)
+          exerr("livesync.cluster.group wants a multicast address, out of 224.0.0.0/4.");
+        break;
       case CONFIG_LIVESYNC_CLUSTER_NODE_IP:
         if (!scan_ip6_net(p, &tmpnet))
           goto parse_error;
@@ -440,7 +446,7 @@ static void help(char *name) {
   fprintf(stderr, "\nExample:   ./opentracker -i 127.0.0.1 -p 6969 -P 6969 -f ./opentracker.conf -i 10.1.1.23 -p 2710 -p 80\n");
   fprintf(stderr, "           Here -i 127.0.0.1 selects the ip address for the next -p 6969 and -P 6969.\n");
   fprintf(stderr, "           If no port is bound from config file or command line, the last address given\n");
-  fprintf(stderr, "           (or ::1 if none is set) will be used on port 6969.\n");
+  fprintf(stderr, "           is used on port 6969, and every interface if none was given.\n");
 }
 #undef HELPLINE