int CoreSocket::connect(const GSockAddr &server, int iFLTag, int *fd,
int nodelay)
{
int type = SOCK_STREAM;
int ret;
*fd = ::socket(server.family(), type, 0);
if (*fd == -1)
return LS_FAIL;
if (iFLTag)
::fcntl(*fd, F_SETFL, iFLTag);
if ((nodelay) && ((server.family() == AF_INET) ||
(server.family() == AF_INET6)))
::setsockopt(*fd, IPPROTO_TCP, TCP_NODELAY, &nodelay, sizeof(int));
ret = ::connect(*fd, server.get(), server.len());
if (ret != 0)
{
if (!((iFLTag & O_NONBLOCK) && (errno == EINPROGRESS)))
{
::close(*fd);
*fd = -1;
}
return LS_FAIL;
}
return ret;
}
int CoreSocket::bind(const GSockAddr &server, int type, int *fd)
{
int ret;
if (!server.get())
return EINVAL;
*fd = ::socket(server.family(), type, 0);
if (*fd == -1)
return errno;
int flag = 1;
if (setsockopt(*fd, SOL_SOCKET, SO_REUSEADDR,
(char *)(&flag), sizeof(flag)) == 0)
{
ret = ::bind(*fd, server.get(), server.len());
if (!ret)
return ret;
}
ret = errno;
::close(*fd);
*fd = -1;
return ret;
}
int CoreSocket::listen(const GSockAddr &server, int backLog, int *fd,
int sndBuf, int rcvBuf)
{
int ret;
ret = bind(server, SOCK_STREAM, fd);
if (ret)
return ret;
if (sndBuf > 4096)
::setsockopt(*fd, SOL_SOCKET, SO_SNDBUF, &sndBuf, sizeof(int));
if (rcvBuf > 4096)
::setsockopt(*fd, SOL_SOCKET, SO_RCVBUF, &rcvBuf, sizeof(int));
if (((server.family() == AF_INET) ||
(server.family() == AF_INET6)))
{
int nodelay = 1;
::setsockopt(*fd, IPPROTO_TCP, TCP_NODELAY, &nodelay, sizeof(int));
#ifdef TCP_FASTOPEN
nodelay = backLog / 2;
if (nodelay > 256)
nodelay = 256;
::setsockopt(*fd, IPPROTO_TCP, TCP_FASTOPEN, &nodelay, sizeof(int));
#endif
}
ret = ::listen(*fd, backLog);
if (ret == 0)
return 0;
ret = errno;
::close(*fd);
*fd = -1;
return ret;
}