int net_socket_create(int af, int type, int protocol)
{
int sd = socket(af, type, protocol);
if (sd == -1)
{
net_error_out(sd, "net_socket_create");
return -1;
}
#ifdef SOCK_DUAL_STACK_OPT
/* BSD style */
if (af == AF_INET6)
{
int off = 0;
if (net_setsockopt(sd, IPPROTO_IPV6, SOCK_DUAL_STACK_OPT, (char*) &off, sizeof(off)) < 0)
{
LOG_ERROR("net_socket_create(): Cannot set socket to dual stack mode IPv6/IPv4 (%d - %s).", net_error(), net_error_string(net_error()));
}
}
#endif
return sd;
}
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;
}
static void net_error_out(int fd, const char* func)
{
int err = net_error();
LOG_ERROR("%s, fd=%d: %s (%d)", func, fd, net_error_string(err), err);
}
