Added the `MulticastTTL' option so users can set a TTL different to `1'.

diff --git a/src/configfile.c b/src/configfile.c
index c217724..52978b3 100644 (file)
--- a/src/configfile.c
+++ b/src/configfile.c
@@ -69,15 +69,12 @@ typedef struct cf_mode_item
  */
 static cf_mode_item_t cf_mode_list[] =
 {
-       /*
-       {"Server",      NULL, MODE_CLIENT                           },
-       {"Port",        NULL, MODE_CLIENT | MODE_SERVER             },
-       */
+       {"MulticastTTL",NULL, MODE_CLIENT                           },
        {"PIDFile",     NULL, MODE_CLIENT | MODE_SERVER | MODE_LOCAL},
        {"DataDir",     NULL, MODE_CLIENT | MODE_SERVER | MODE_LOCAL},
        {"LogFile",     NULL, MODE_CLIENT | MODE_SERVER | MODE_LOCAL}
 };
-static int cf_mode_num = 3;
+static int cf_mode_num = 4;
 
 static int nesting_depth = 0;
 static char *current_module = NULL;

diff --git a/src/network.c b/src/network.c
index 3fe25fd..cecf0ba 100644 (file)
--- a/src/network.c
+++ b/src/network.c
@@ -33,6 +33,7 @@
 
 #include "network.h"
 #include "common.h"
+#include "configfile.h"
 #include "utils_debug.h"
 
 /* 1500 - 40 - 8  =  Ethernet packet - IPv6 header - UDP header */
@@ -61,6 +62,16 @@ static int network_bind_socket (const sockent_t *se, const struct addrinfo *ai)
 {
        int loop = 1;
 
+       char *ttl_str;
+       int   ttl_int;
+
+       ttl_str = cf_get_option ("MulticastTTL", NULL);
+       ttl_int = 0;
+       if (ttl_str != NULL)
+               ttl_int = atoi (ttl_str);
+       if ((ttl_int < 1) || (ttl_int > 255))
+               ttl_int = NET_DEFAULT_MC_TTL;
+
        DBG ("fd = %i; calling `bind'", se->fd);
 
        if (bind (se->fd, ai->ai_addr, ai->ai_addrlen) == -1)
@@ -88,6 +99,14 @@ static int network_bind_socket (const sockent_t *se, const struct addrinfo *ai)
                                return (-1);
                        }
 
+                       /* IP_MULTICAST_TTL */
+                       if (setsockopt (se->fd, IPPROTO_IP, IP_MULTICAST_TTL,
+                                               &ttl_int, sizeof (ttl_int)) == -1)
+                       {
+                               syslog (LOG_ERR, "setsockopt: %s", strerror (errno));
+                               return (-1);
+                       }
+
                        if (setsockopt (se->fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
                                                &mreq, sizeof (mreq)) == -1)
                        {
@@ -128,6 +147,13 @@ static int network_bind_socket (const sockent_t *se, const struct addrinfo *ai)
                                return (-1);
                        }
 
+                       if (setsockopt (se->fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
+                                               &ttl_int, sizeof (ttl_int)) == -1)
+                       {
+                               syslog (LOG_ERR, "setsockopt: %s", strerror (errno));
+                               return (-1);
+                       }
+
                        if (setsockopt (se->fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
                                                &mreq, sizeof (mreq)) == -1)
                        {

diff --git a/src/network.h b/src/network.h
index 374448c..aa3d3fc 100644 (file)
--- a/src/network.h
+++ b/src/network.h
@@ -54,6 +54,7 @@
 #define NET_DEFAULT_V4_ADDR "239.192.74.66"
 #define NET_DEFAULT_V6_ADDR "ff18::efc0:4a42"
 #define NET_DEFAULT_PORT    "25826"
+#define NET_DEFAULT_MC_TTL  1
 
 int network_create_socket (const char *node, const char *service);
 int network_receive (char **host, char **type, char **instance, char **value);