Socket*
socket_mc_in_new(
char* name, //! Name used for debugging
char* addr, //! IP address of the multicast socket/channel.
int port, //! Port used
char* iface //! Name of the interface (eth0/eth1) to bind to
) {
SocketInt* self;
if ((self = (SocketInt*)socket_in_new(name, port, FALSE)) == NULL)
return NULL;
// self->addr = addr;
//self->localport = port;
self->iface = iface;
// JOIN multicast group on default interface
self->imreq.imr_multiaddr.s_addr = inet_addr(addr);
self->imreq.imr_interface.s_addr = iface2addr(name, iface);
if (setsockopt(self->sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
(const void *)&(self->imreq),
sizeof(struct ip_mreq)) < 0) {
o_log(O_LOG_ERROR, "socket:%s: Error while joining a multicast group\n", name);
return NULL;
}
o_log(O_LOG_DEBUG, "socket:%s: Ready to receive data on multicast address: %s\n",
name, addr);
return (Socket*)self;
}
Socket*
socket_mc_out_new(
char* name, //! Name used for debugging
char* mcast_addr, //! IP address of the multicast socket/channel.
int mcast_port, //! Port used
char* iface //! Name of the interface (eth0/eth1) to bind to
) {
SocketInt* self;
// if ((self = (SocketInt*)socket_new(name, mcast_addr, 0)) == NULL)
// return NULL;
if ((self = (SocketInt*)socket_new(name, FALSE)) == NULL)
return NULL;
// Multicast parameters
unsigned char ttl = 3;
unsigned char one = 3; // loopback
struct in_addr addr;
addr.s_addr = iface2addr(name, iface);
o_log(O_LOG_DEBUG, "socket:%s: Binding to %x\n", name, addr.s_addr);
if (setsockopt(self->sockfd, IPPROTO_IP, IP_MULTICAST_IF, &addr, sizeof(addr)) < 0) {
o_log (O_LOG_ERROR, "socket:%s: Setting outgoing interface for socket\n\t%s",
name, strerror(errno));
socket_free((Socket*)socket);
return NULL;
}
if (setsockopt(self->sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &ttl,
sizeof(unsigned char)) < 0) {
o_log(O_LOG_ERROR, "socket:%s: While setting TTL parameter for multicast socket\n\t%s",
name, strerror(errno));
socket_free((Socket*)socket);
return NULL;
}
if (setsockopt(self->sockfd, IPPROTO_IP, IP_MULTICAST_LOOP,
&one, sizeof(unsigned char)) < 0) {
o_log(O_LOG_ERROR, "socket%s: While setting the loopback on multicast socket\n\t%s",
name, strerror(errno));
socket_free((Socket*)socket);
return NULL;
}
// self->addr = mcast_addr;
self->servAddr.sin_port = htons(mcast_port);
self->servAddr.sin_addr.s_addr = inet_addr(mcast_addr);
o_log(O_LOG_DEBUG, "socket:%s: Ready to send data on: %s:%d\n",
name, mcast_addr, mcast_port);
return (Socket*)self;
}
