add cluster_mcast_ttl option

[l2tpns.git] / cluster.c

diff --git a/cluster.c b/cluster.c
index 2370eaf..12e7c08 100644 (file)
--- a/cluster.c
+++ b/cluster.c
@@ -1,6 +1,6 @@
 // L2TPNS Clustering Stuff
 
-char const *cvs_id_cluster = "$Id: cluster.c,v 1.45 2005-07-31 10:04:09 bodea Exp $";
+char const *cvs_id_cluster = "$Id: cluster.c,v 1.46 2005-09-02 23:59:56 bodea Exp $";
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -127,6 +127,15 @@ int cluster_init()
        opt = 0;        // Turn off multicast loopback.
        setsockopt(cluster_sockfd, IPPROTO_IP, IP_MULTICAST_LOOP, &opt, sizeof(opt));
 
+       if (config->cluster_mcast_ttl != 1)
+       {
+               uint8_t ttl = 0;
+               if (config->cluster_mcast_ttl > 0)
+                       ttl = config->cluster_mcast_ttl < 256 ? config->cluster_mcast_ttl : 255;
+
+               setsockopt(cluster_sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl));
+       }
+
        if (setsockopt(cluster_sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0)
        {
                LOG(0, 0, 0, "Failed to setsockopt (join mcast group): %s\n", strerror(errno));