static struct net_connection* start_listening_socket(const char* bind_addr, uint16_t port, int backlog, struct hub_info* hub)
{
struct net_connection* server;
struct sockaddr_storage addr;
socklen_t sockaddr_size;
int sd, ret;
if (ip_convert_address(bind_addr, port, (struct sockaddr*) &addr, &sockaddr_size) == -1)
{
return 0;
}
sd = net_socket_create(addr.ss_family, SOCK_STREAM, IPPROTO_TCP);
if (sd == -1)
{
return 0;
}
if ((net_set_reuseaddress(sd, 1) == -1) || (net_set_nonblocking(sd, 1) == -1))
{
net_close(sd);
return 0;
}
ret = net_bind(sd, (struct sockaddr*) &addr, sockaddr_size);
if (ret == -1)
{
LOG_ERROR("hub_start_service(): Unable to bind to TCP local address. errno=%d, str=%s", net_error(), net_error_string(net_error()));
net_close(sd);
return 0;
}
ret = net_listen(sd, backlog);
if (ret == -1)
{
LOG_ERROR("hub_start_service(): Unable to listen to socket");
net_close(sd);
return 0;
}
server = net_con_create();
net_con_initialize(server, sd, net_on_accept, hub, NET_EVENT_READ);
return server;
}
int net_socket( const char name[], const char ifname[], int protocol, int af ) {
int sock;
if( protocol == IPPROTO_TCP ) {
sock = socket( af, SOCK_STREAM, IPPROTO_TCP );
} else if( protocol == IPPROTO_UDP ) {
sock = socket( af, SOCK_DGRAM, IPPROTO_UDP );
} else {
sock = -1;
}
if( sock < 0 ) {
log_err( "%s: Failed to create socket: %s", name, strerror( errno ) );
return -1;
}
if( net_set_nonblocking( sock ) < 0 ) {
close( sock );
log_err( "%s: Failed to make socket nonblocking: '%s'", name, strerror( errno ) );
return -1;
}
#if defined(__APPLE__) || defined(__CYGWIN__) || defined(__FreeBSD__)
if( ifname ) {
close( sock );
log_err( "%s: Bind to device not supported on Windows and MacOSX.", name );
return -1;
}
#else
if( ifname && setsockopt( sock, SOL_SOCKET, SO_BINDTODEVICE, ifname, strlen( ifname ) ) ) {
close( sock );
log_err( "%s: Unable to bind to device '%s': %s", name, ifname, strerror( errno ) );
return -1;
}
#endif
const int optval = 1;
if( setsockopt( sock, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval) ) < 0 ) {
close( sock );
log_err( "%s: Unable to set SO_REUSEADDR for '%s': %s", name, strerror( errno ) );
return -1;
}
return sock;
}
int net_bind(
const char *name,
const char* addr,
const char* port,
const char* ifce,
int protocol, int af
) {
char addrbuf[FULL_ADDSTRLEN+1];
int sock;
int val;
IP sockaddr;
if( af != AF_INET && af != AF_INET6 ) {
log_err( "NET: Unknown address family value." );
return -1;
}
if( addr_parse( &sockaddr, addr, port, af ) != 0 ) {
log_err( "NET: Failed to parse IP address '%s' and port '%s'.", addr, port );
return -1;
}
if( protocol == IPPROTO_TCP ) {
sock = socket( sockaddr.ss_family, SOCK_STREAM, IPPROTO_TCP );
} else if( protocol == IPPROTO_UDP ) {
sock = socket( sockaddr.ss_family, SOCK_DGRAM, IPPROTO_UDP );
} else {
sock = -1;
}
if( sock < 0 ) {
log_err( "NET: Failed to create socket: %s", strerror( errno ) );
return -1;
}
val = 1;
if ( setsockopt( sock, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val) ) < 0 ) {
close( sock );
log_err( "NET: Failed to set socket option SO_REUSEADDR: %s", strerror( errno ));
return -1;
}
if( ifce && setsockopt( sock, SOL_SOCKET, SO_BINDTODEVICE, ifce, strlen( ifce ) ) ) {
close( sock );
log_err( "NET: Unable to bind to device '%s': %s", ifce, strerror( errno ) );
return -1;
}
if( af == AF_INET6 ) {
val = 1;
if( setsockopt( sock, IPPROTO_IPV6, IPV6_V6ONLY, &val, sizeof(val) ) < 0 ) {
close( sock );
log_err( "NET: Failed to set socket option IPV6_V6ONLY: %s", strerror( errno ));
return -1;
}
}
if( bind( sock, (struct sockaddr*) &sockaddr, sizeof(IP) ) < 0 ) {
close( sock );
log_err( "NET: Failed to bind socket to address: '%s'", strerror( errno ) );
return -1;
}
if( net_set_nonblocking( sock ) < 0 ) {
close( sock );
log_err( "NET: Failed to make socket nonblocking: '%s'", strerror( errno ) );
return -1;
}
if( protocol == IPPROTO_TCP && listen( sock, 5 ) < 0 ) {
close( sock );
log_err( "NET: Failed to listen on socket: '%s'", strerror( errno ) );
return -1;
}
log_info( ifce ? "%s: Bind to %s, interface %s" : "%s: Bind to %s" ,
name, str_addr( &sockaddr, addrbuf ), ifce
);
return sock;
}