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/*
Copyright (c) 2007-2010 iMatix Corporation
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 "tcp_socket.hpp"
#include "platform.hpp"
#include "err.hpp"
#ifdef ZMQ_HAVE_WINDOWS
zmq::tcp_socket_t::tcp_socket_t () :
s (retired_fd)
{
}
zmq::tcp_socket_t::~tcp_socket_t ()
{
if (s != retired_fd)
close ();
}
int zmq::tcp_socket_t::open (fd_t fd_, uint64_t sndbuf_, uint64_t rcvbuf_)
{
zmq_assert (s == retired_fd);
s = fd_;
if (sndbuf_) {
int sz = (int) sndbuf_;
int rc = setsockopt (s, SOL_SOCKET, SO_SNDBUF,
(char*) &sz, sizeof (int));
errno_assert (rc == 0);
}
if (rcvbuf_) {
int sz = (int) rcvbuf_;
int rc = setsockopt (s, SOL_SOCKET, SO_RCVBUF,
(char*) &sz, sizeof (int));
errno_assert (rc == 0);
}
return 0;
}
int zmq::tcp_socket_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_socket_t::get_fd ()
{
return s;
}
int zmq::tcp_socket_t::write (const void *data, int size)
{
int nbytes = send (s, (char*) data, size, 0);
// If not a single byte can be written to the socket in non-blocking mode
// we'll get an error (this may happen during the speculative write).
if (nbytes == SOCKET_ERROR && WSAGetLastError () == WSAEWOULDBLOCK)
return 0;
// Signalise peer failure.
if (nbytes == -1 && (
WSAGetLastError () == WSAENETDOWN ||
WSAGetLastError () == WSAENETRESET ||
WSAGetLastError () == WSAEHOSTUNREACH ||
WSAGetLastError () == WSAECONNABORTED ||
WSAGetLastError () == WSAETIMEDOUT ||
WSAGetLastError () == WSAECONNRESET))
return -1;
wsa_assert (nbytes != SOCKET_ERROR);
return (size_t) nbytes;
}
int zmq::tcp_socket_t::read (void *data, int size)
{
int nbytes = recv (s, (char*) data, size, 0);
// If not a single byte can be read from the socket in non-blocking mode
// we'll get an error (this may happen during the speculative read).
if (nbytes == SOCKET_ERROR && WSAGetLastError () == WSAEWOULDBLOCK)
return 0;
// Connection failure.
if (nbytes == -1 && (
WSAGetLastError () == WSAENETDOWN ||
WSAGetLastError () == WSAENETRESET ||
WSAGetLastError () == WSAECONNABORTED ||
WSAGetLastError () == WSAETIMEDOUT ||
WSAGetLastError () == WSAECONNRESET ||
WSAGetLastError () == WSAECONNREFUSED ||
WSAGetLastError () == WSAENOTCONN))
return -1;
wsa_assert (nbytes != SOCKET_ERROR);
// Orderly shutdown by the other peer.
if (nbytes == 0)
return -1;
return (size_t) nbytes;
}
#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_socket_t::tcp_socket_t () :
s (retired_fd)
{
}
zmq::tcp_socket_t::~tcp_socket_t ()
{
if (s != retired_fd)
close ();
}
int zmq::tcp_socket_t::open (fd_t fd_, uint64_t sndbuf_, uint64_t rcvbuf_)
{
assert (s == retired_fd);
s = fd_;
if (sndbuf_) {
int sz = (int) sndbuf_;
int rc = setsockopt (s, SOL_SOCKET, SO_SNDBUF, &sz, sizeof (int));
errno_assert (rc == 0);
}
if (rcvbuf_) {
int sz = (int) rcvbuf_;
int rc = setsockopt (s, SOL_SOCKET, SO_RCVBUF, &sz, sizeof (int));
errno_assert (rc == 0);
}
return 0;
}
int zmq::tcp_socket_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_socket_t::get_fd ()
{
return s;
}
int zmq::tcp_socket_t::write (const void *data, int size)
{
ssize_t nbytes = send (s, data, size, 0);
// Several errors are OK. When speculative write is being done we may not
// be able to write a single byte to the socket. Also, SIGSTOP issued
// by a debugging tool can result in EINTR error.
if (nbytes == -1 && (errno == EAGAIN || errno == EWOULDBLOCK ||
errno == EINTR))
return 0;
// Signalise peer failure.
if (nbytes == -1 && (errno == ECONNRESET || errno == EPIPE))
return -1;
errno_assert (nbytes != -1);
return (size_t) nbytes;
}
int zmq::tcp_socket_t::read (void *data, int size)
{
ssize_t nbytes = recv (s, data, size, 0);
// Several errors are OK. When speculative read is being done we may not
// be able to read a single byte to the socket. Also, SIGSTOP issued
// by a debugging tool can result in EINTR error.
if (nbytes == -1 && (errno == EAGAIN || errno == EWOULDBLOCK ||
errno == EINTR))
return 0;
// Signalise peer failure.
if (nbytes == -1 && (errno == ECONNRESET || errno == ECONNREFUSED ||
errno == ETIMEDOUT))
return -1;
errno_assert (nbytes != -1);
// Orderly shutdown by the other peer.
if (nbytes == 0)
return -1;
return (size_t) nbytes;
}
#endif
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