socket_stream& socket_stream::set_tcp_nodelay(bool on)
{
ACL_SOCKET sock = sock_handle();
if (sock == ACL_SOCKET_INVALID)
{
logger_error("invalid socket handle");
return *this;
}
acl_tcp_nodelay(sock, on ? 1 : 0);
return *this;
}
ACL_SOCKET acl_sane_accept(ACL_SOCKET sock, struct sockaddr * sa, socklen_t *len)
{
static int accept_ok_errors[] = {
ACL_EAGAIN,
ACL_ECONNREFUSED,
ACL_ECONNRESET,
ACL_EHOSTDOWN,
ACL_EHOSTUNREACH,
ACL_EINTR,
ACL_ENETDOWN,
ACL_ENETUNREACH,
ACL_ENOTCONN,
ACL_EWOULDBLOCK,
ACL_ENOBUFS, /* HPUX11 */
ACL_ECONNABORTED,
0,
};
ACL_SOCKET fd;
/*
* XXX Solaris 2.4 accept() returns EPIPE when a UNIX-domain client
* has disconnected in the mean time. From then on, UNIX-domain
* sockets are hosed beyond recovery. There is no point treating
* this as a beneficial error result because the program would go
* into a tight loop.
* XXX LINUX < 2.1 accept() wakes up before the three-way handshake is
* complete, so it can fail with ECONNRESET and other "false alarm"
* indications.
*
* XXX FreeBSD 4.2-STABLE accept() returns ECONNABORTED when a
* UNIX-domain client has disconnected in the mean time. The data
* that was sent with connect() write() close() is lost, even though
* the write() and close() reported successful completion.
* This was fixed shortly before FreeBSD 4.3.
*
* XXX HP-UX 11 returns ENOBUFS when the client has disconnected in
* the mean time.
*/
fd = accept(sock, (struct sockaddr *) sa, (socklen_t *) len);
if (fd == ACL_SOCKET_INVALID) {
int count = 0, err, error = acl_last_error();
for (; (err = accept_ok_errors[count]) != 0; count++) {
if (error == err) {
acl_set_error(ACL_EAGAIN);
break;
}
}
}
/*
* XXX Solaris select() produces false read events, so that read()
* blocks forever on a blocking socket, and fails with EAGAIN on
* a non-blocking socket. Turning on keepalives will fix a blocking
* socket provided that the kernel's keepalive timer expires before
* the Postfix watchdog timer.
*/
else if (sa != 0 && sa->sa_family == AF_INET) {
int on = 1;
/* default set client to nodelay --- add by zsx, 2008.9.4 */
acl_tcp_nodelay(fd, on);
#if defined(BROKEN_READ_SELECT_ON_TCP_SOCKET) && defined(SO_KEEPALIVE)
(void) setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE,
(char *) &on, sizeof(on));
#endif
}
return fd;
}
void acl_tcp_set_nodelay(ACL_SOCKET fd)
{
acl_tcp_nodelay(fd, 1);
}