int create_receive_socket( void ) {
const char *any_addr;
int sock;
any_addr = (gconf->af == AF_INET) ? "0.0.0.0" : "::";
sock = net_bind( "LPD", any_addr, LPD_PORT, gconf->dht_ifname, IPPROTO_UDP, gconf->af );
const int opt_off = 0;
if( multicast_set_loop( sock, gconf->af, opt_off ) < 0 ) {
log_warn( "LPD: Failed to set IP_MULTICAST_LOOP: %s", strerror( errno ) );
goto fail;
}
const int opt_on = 1;
if( setsockopt( sock, SOL_SOCKET, SO_REUSEADDR, &opt_on, sizeof(opt_on) ) < 0 ) {
log_warn( "LPD: Unable to set SO_REUSEADDR: %s", strerror( errno ) );
goto fail;
}
return sock;
fail:
close( sock );
return -1;
}
int create_receive_socket( void ) {
int sock_recv;
sock_recv = net_bind( "LPD", gconf->lpd_addr, DHT_PORT_MCAST, gconf->dht_ifce, IPPROTO_UDP, gconf->af );
/* We don't want to receive our own packets */
if( multicast_set_loop( sock_recv, gconf->af, 0 ) < 0 ) {
close( sock_recv );
log_warn( "LPD: Failed to set IP_MULTICAST_LOOP: %s", strerror( errno ) );
return -1;
}
return sock_recv;
}
int create_send_socket( void ) {
int sock_send;
sock_send = net_socket( "LPD", gconf->dht_ifce, IPPROTO_UDP, gconf->af );
if( multicast_set_ttl( sock_send, gconf->af, 1 ) < 0 ) {
log_err( "LPD: Failed to set IP_MULTICAST_TTL for sending socket: %s", strerror( errno ));
goto fail;
}
if( multicast_set_loop( sock_send, gconf->af, 0 ) < 0 ) {
log_warn( "LPD: Failed to set IP_MULTICAST_LOOP: %s", strerror( errno ) );
goto fail;
}
return sock_send;
fail:
close( sock_send );
return -1;
}