#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);