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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software 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
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef WIN32
//#include <io.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#define errorNumber WSAGetLastError()
#define SHUT_RD SD_RECEIVE
#define SHUT_WR SD_SEND
#define SHUT_RDWR SD_BOTH
#else
#define errorNumber errno
#define closesocket close
#include <sys/socket.h>
#endif
#include <unistd.h>
#include <signal.h>
#include <fcntl.h>
#include <errno.h>
#include <network/Socket.h>
using namespace network;
// -=- Socket initialisation
static bool socketsInitialised = false;
void network::initSockets() {
if (socketsInitialised)
return;
#ifdef WIN32
WORD requiredVersion = MAKEWORD(2,0);
WSADATA initResult;
if (WSAStartup(requiredVersion, &initResult) != 0)
throw SocketException("unable to initialise Winsock2", errorNumber);
#else
signal(SIGPIPE, SIG_IGN);
#endif
socketsInitialised = true;
}
bool network::isSocketListening(int sock)
{
int listening = 0;
socklen_t listening_size = sizeof(listening);
if (getsockopt(sock, SOL_SOCKET, SO_ACCEPTCONN,
(char *)&listening, &listening_size) < 0)
return false;
return listening != 0;
}
Socket::Socket(int fd)
: instream(0), outstream(0),
isShutdown_(false), queryConnection(false)
{
initSockets();
setFd(fd);
}
Socket::Socket()
: instream(0), outstream(0),
isShutdown_(false), queryConnection(false)
{
initSockets();
}
Socket::~Socket()
{
if (instream && outstream)
closesocket(getFd());
delete instream;
delete outstream;
}
// if shutdown() is overridden then the override MUST call on to here
void Socket::shutdown()
{
isShutdown_ = true;
::shutdown(getFd(), SHUT_RDWR);
}
bool Socket::isShutdown() const
{
return isShutdown_;
}
// Was there a "?" in the ConnectionFilter used to accept this Socket?
void Socket::setRequiresQuery()
{
queryConnection = true;
}
bool Socket::requiresQuery() const
{
return queryConnection;
}
void Socket::setFd(int fd)
{
#ifndef WIN32
// - By default, close the socket on exec()
fcntl(fd, F_SETFD, FD_CLOEXEC);
#endif
instream = new rdr::FdInStream(fd);
outstream = new rdr::FdOutStream(fd);
isShutdown_ = false;
}
SocketListener::SocketListener(int fd)
: fd(fd), filter(0)
{
initSockets();
}
SocketListener::SocketListener()
: fd(-1), filter(0)
{
initSockets();
}
SocketListener::~SocketListener()
{
if (fd != -1)
closesocket(fd);
}
void SocketListener::shutdown()
{
#ifdef WIN32
closesocket(fd);
fd = -1;
#else
::shutdown(fd, SHUT_RDWR);
#endif
}
Socket* SocketListener::accept() {
int new_sock = -1;
// Accept an incoming connection
if ((new_sock = ::accept(fd, 0, 0)) < 0)
throw SocketException("unable to accept new connection", errorNumber);
// Create the socket object & check connection is allowed
Socket* s = createSocket(new_sock);
if (filter && !filter->verifyConnection(s)) {
delete s;
return NULL;
}
return s;
}
void SocketListener::listen(int sock)
{
// - Set it to be a listening socket
if (::listen(sock, 5) < 0) {
int e = errorNumber;
closesocket(sock);
throw SocketException("unable to set socket to listening mode", e);
}
fd = sock;
}
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