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/*
Copyright (c) 2007-2009 FastMQ Inc.
This file is part of 0MQ.
0MQ is free software; you can redistribute it and/or modify it under
the terms of the Lesser GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
0MQ is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
Lesser GNU General Public License for more details.
You should have received a copy of the Lesser GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string>
#include "tcp_connecter.hpp"
#include "platform.hpp"
#include "ip.hpp"
#include "err.hpp"
#ifdef ZMQ_HAVE_WINDOWS
zmq::tcp_connecter_t::tcp_connecter_t () :
s (retired_fd)
{
memset (&addr, 0, sizeof (addr));
}
zmq::tcp_connecter_t::~tcp_connecter_t ()
{
if (s != retired_fd)
close ();
}
int zmq::tcp_connecter_t::set_address (const char *addr_)
{
// Convert the hostname into sockaddr_in structure.
return resolve_ip_hostname (&addr, addr_);
}
int zmq::tcp_connecter_t::open ()
{
zmq_assert (s == retired_fd);
// Create the socket.
s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
// TODO: Convert error to errno.
wsa_assert (s != INVALID_SOCKET);
// Set to non-blocking mode.
unsigned long argp = 1;
int rc = ioctlsocket (s, FIONBIO, &argp);
wsa_assert (rc != SOCKET_ERROR);
// Disable Nagle's algorithm.
int flag = 1;
rc = setsockopt (s, IPPROTO_TCP, TCP_NODELAY, (char*) &flag,
sizeof (int));
wsa_assert (rc != SOCKET_ERROR);
// Connect to the remote peer.
rc = ::connect (s, (sockaddr*) &addr, sizeof addr);
// Connect was successfull immediately.
if (rc == 0)
return 0;
// Asynchronous connect was launched.
if (rc == SOCKET_ERROR && (WSAGetLastError () == WSAEINPROGRESS ||
WSAGetLastError () == WSAEWOULDBLOCK)) {
errno = EAGAIN;
return -1;
}
// TODO: Convert error to errno.
wsa_assert (rc == 0);
return -1;
}
int zmq::tcp_connecter_t::close ()
{
zmq_assert (s != retired_fd);
int rc = closesocket (s);
wsa_assert (rc != SOCKET_ERROR);
s = retired_fd;
return 0;
}
zmq::fd_t zmq::tcp_connecter_t::get_fd ()
{
return s;
}
zmq::fd_t zmq::tcp_connecter_t::connect ()
{
// Nonblocking connect have finished. Check whether an error occured.
int err = 0;
socklen_t len = sizeof err;
int rc = getsockopt (s, SOL_SOCKET, SO_ERROR, (char*) &err, &len);
zmq_assert (rc == 0);
if (err != 0) {
// Assert that the error was caused by the networking problems
// rather than 0MQ bug.
zmq_assert (err == WSAECONNREFUSED);
errno = err;
return retired_fd;
}
// Return the newly connected socket.
fd_t result = s;
s = retired_fd;
return result;
}
#else
#include <unistd.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/tcp.h>
#include <netinet/in.h>
#include <netdb.h>
#include <fcntl.h>
zmq::tcp_connecter_t::tcp_connecter_t () :
s (retired_fd)
{
memset (&addr, 0, sizeof (addr));
}
zmq::tcp_connecter_t::~tcp_connecter_t ()
{
if (s != retired_fd)
close ();
}
int zmq::tcp_connecter_t::set_address (const char *addr_)
{
// Convert the hostname into sockaddr_in structure.
return resolve_ip_hostname (&addr, addr_);
}
int zmq::tcp_connecter_t::open ()
{
zmq_assert (s == retired_fd);
// Create the socket.
s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (s == -1)
return -1;
// Set to non-blocking mode.
int flags = fcntl (s, F_GETFL, 0);
if (flags == -1)
flags = 0;
int rc = fcntl (s, F_SETFL, flags | O_NONBLOCK);
errno_assert (rc != -1);
// Disable Nagle's algorithm.
int flag = 1;
rc = setsockopt (s, IPPROTO_TCP, TCP_NODELAY, (char*) &flag, sizeof (int));
errno_assert (rc == 0);
#ifdef ZMQ_HAVE_OPENVMS
// Disable delayed acknowledgements.
flag = 1;
rc = setsockopt (s, IPPROTO_TCP, TCP_NODELACK, (char*) &flag, sizeof (int));
errno_assert (rc != SOCKET_ERROR);
#endif
// Connect to the remote peer.
rc = ::connect (s, (sockaddr*) &addr, sizeof (addr));
// Connect was successfull immediately.
if (rc == 0)
return 0;
// Asynchronous connect was launched.
if (rc == -1 && errno == EINPROGRESS) {
errno = EAGAIN;
return -1;
}
// Error occured.
int err = errno;
close ();
errno = err;
return -1;
}
int zmq::tcp_connecter_t::close ()
{
zmq_assert (s != retired_fd);
int rc = ::close (s);
if (rc != 0)
return -1;
s = retired_fd;
return 0;
}
zmq::fd_t zmq::tcp_connecter_t::get_fd ()
{
return s;
}
zmq::fd_t zmq::tcp_connecter_t::connect ()
{
// Following code should handle both Berkeley-derived socket
// implementations and Solaris.
int err = 0;
socklen_t len = sizeof err;
int rc = getsockopt (s, SOL_SOCKET, SO_ERROR, (char*) &err, &len);
if (rc == -1)
err = errno;
if (err != 0) {
// Assert that the error was caused by the networking problems
// rather than 0MQ bug.
zmq_assert (err == ECONNREFUSED);
errno = err;
return retired_fd;
}
fd_t result = s;
s = retired_fd;
return result;
}
#endif
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