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// **********************************************************************
//
// Copyright (c) 2003-2011 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
#include <Ice/TcpAcceptor.h>
#include <Ice/TcpTransceiver.h>
#include <Ice/Instance.h>
#include <Ice/TraceLevels.h>
#include <Ice/LoggerUtil.h>
#include <Ice/Network.h>
#include <Ice/Exception.h>
#include <Ice/Properties.h>
#include <IceUtil/StringUtil.h>
#ifdef ICE_USE_IOCP
# include <Mswsock.h>
#endif
using namespace std;
using namespace Ice;
using namespace IceInternal;
NativeInfoPtr
IceInternal::TcpAcceptor::getNativeInfo()
{
return this;
}
#ifdef ICE_USE_IOCP
AsyncInfo*
IceInternal::TcpAcceptor::getAsyncInfo(SocketOperation op)
{
assert(op == SocketOperationRead);
return &_info;
}
#endif
void
IceInternal::TcpAcceptor::close()
{
if(_traceLevels->network >= 1)
{
Trace out(_logger, _traceLevels->networkCat);
out << "stopping to accept tcp connections at " << toString();
}
SOCKET fd = _fd;
_fd = INVALID_SOCKET;
closeSocket(fd);
}
void
IceInternal::TcpAcceptor::listen()
{
try
{
doListen(_fd, _backlog);
}
catch(...)
{
_fd = INVALID_SOCKET;
throw;
}
if(_traceLevels->network >= 1)
{
Trace out(_logger, _traceLevels->networkCat);
out << "accepting tcp connections at " << toString();
vector<string> interfaces =
getHostsForEndpointExpand(inetAddrToString(_addr), _instance->protocolSupport(), true);
if(!interfaces.empty())
{
out << "\nlocal interfaces: ";
out << IceUtilInternal::joinString(interfaces, ", ");
}
}
}
#ifdef ICE_USE_IOCP
void
IceInternal::TcpAcceptor::startAccept()
{
LPFN_ACCEPTEX AcceptEx = NULL; // a pointer to the 'AcceptEx()' function
GUID GuidAcceptEx = WSAID_ACCEPTEX; // The Guid
DWORD dwBytes;
if(WSAIoctl(_fd,
SIO_GET_EXTENSION_FUNCTION_POINTER,
&GuidAcceptEx,
sizeof(GuidAcceptEx),
&AcceptEx,
sizeof(AcceptEx),
&dwBytes,
NULL,
NULL) == SOCKET_ERROR)
{
SocketException ex(__FILE__, __LINE__);
ex.error = getSocketErrno();
throw ex;
}
assert(_acceptFd == INVALID_SOCKET);
_acceptFd = createSocket(false, _addr.ss_family);
const int sz = static_cast<int>(_acceptBuf.size() / 2);
if(!AcceptEx(_fd, _acceptFd, &_acceptBuf[0], 0, sz, sz, &_info.count,
#if defined(_MSC_VER) && (_MSC_VER < 1300) // COMPILER FIX: VC60
reinterpret_cast<LPOVERLAPPED>(&_info)
#else
&_info
#endif
))
{
if(!wouldBlock())
{
SocketException ex(__FILE__, __LINE__);
ex.error = getSocketErrno();
throw ex;
}
}
}
void
IceInternal::TcpAcceptor::finishAccept()
{
if(_info.count == SOCKET_ERROR || _fd == INVALID_SOCKET)
{
closeSocketNoThrow(_acceptFd);
_acceptFd = INVALID_SOCKET;
_acceptError = _info.error;
}
}
#endif
TransceiverPtr
IceInternal::TcpAcceptor::accept()
{
SOCKET fd;
#ifndef ICE_USE_IOCP
fd = doAccept(_fd);
#else
if(_acceptFd == INVALID_SOCKET)
{
SocketException ex(__FILE__, __LINE__);
ex.error = _acceptError;
throw ex;
}
if(setsockopt(_acceptFd, SOL_SOCKET, SO_UPDATE_ACCEPT_CONTEXT, (char*)&_acceptFd, sizeof(_acceptFd)) ==
SOCKET_ERROR)
{
closeSocketNoThrow(_acceptFd);
_acceptFd = INVALID_SOCKET;
SocketException ex(__FILE__, __LINE__);
ex.error = getSocketErrno();
throw ex;
}
fd = _acceptFd;
_acceptFd = INVALID_SOCKET;
#endif
if(_traceLevels->network >= 1)
{
Trace out(_logger, _traceLevels->networkCat);
out << "accepted tcp connection\n" << fdToString(fd);
}
return new TcpTransceiver(_instance, fd, true);
}
string
IceInternal::TcpAcceptor::toString() const
{
return addrToString(_addr);
}
int
IceInternal::TcpAcceptor::effectivePort() const
{
return getPort(_addr);
}
IceInternal::TcpAcceptor::TcpAcceptor(const InstancePtr& instance, const string& host, int port, ProtocolSupport protocol) :
_instance(instance),
_traceLevels(instance->traceLevels()),
_logger(instance->initializationData().logger),
_addr(getAddressForServer(host, port, protocol))
#ifdef ICE_USE_IOCP
, _acceptFd(INVALID_SOCKET),
_info(SocketOperationRead)
#endif
{
#ifdef SOMAXCONN
_backlog = instance->initializationData().properties->getPropertyAsIntWithDefault("Ice.TCP.Backlog", SOMAXCONN);
#else
_backlog = instance->initializationData().properties->getPropertyAsIntWithDefault("Ice.TCP.Backlog", 511);
#endif
_fd = createSocket(false, _addr.ss_family);
#ifdef ICE_USE_IOCP
_acceptBuf.resize((sizeof(sockaddr_storage) + 16) * 2);
#endif
setBlock(_fd, false);
setTcpBufSize(_fd, _instance->initializationData().properties, _logger);
#ifndef _WIN32
//
// Enable SO_REUSEADDR on Unix platforms to allow re-using the
// socket even if it's in the TIME_WAIT state. On Windows,
// this doesn't appear to be necessary and enabling
// SO_REUSEADDR would actually not be a good thing since it
// allows a second process to bind to an address even it's
// already bound by another process.
//
// TODO: using SO_EXCLUSIVEADDRUSE on Windows would probably
// be better but it's only supported by recent Windows
// versions (XP SP2, Windows Server 2003).
//
setReuseAddress(_fd, true);
#endif
if(_traceLevels->network >= 2)
{
Trace out(_logger, _traceLevels->networkCat);
out << "attempting to bind to tcp socket " << toString();
}
const_cast<struct sockaddr_storage&>(_addr) = doBind(_fd, _addr);
}
IceInternal::TcpAcceptor::~TcpAcceptor()
{
assert(_fd == INVALID_SOCKET);
#ifdef ICE_USE_IOCP
assert(_acceptFd == INVALID_SOCKET);
#endif
}
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