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369 lines
8.7 KiB
369 lines
8.7 KiB
/* -*- C++ -*-
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* Copyright (C) 2003 Thiago Macieira <thiago.macieira@kdemail.net>
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*
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <config.h>
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#include <tqsocketnotifier.h>
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#include <tqdatetime.h>
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#include <tqtimer.h>
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#include <tqguardedptr.h>
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#include "ksocketaddress.h"
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#include "kresolver.h"
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#include "ksocketdevice.h"
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#include "kstreamsocket.h"
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using namespace KNetwork;
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class KNetwork::KStreamSocketPrivate
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{
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public:
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KResolverResults::ConstIterator local, peer;
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TQTime startTime;
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TQTimer timer;
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int timeout;
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inline KStreamSocketPrivate()
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: timeout(0)
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{ }
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};
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KStreamSocket::KStreamSocket(const TQString& node, const TQString& service,
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TQObject* parent, const char *name)
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: KClientSocketBase(parent, name), d(new KStreamSocketPrivate)
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{
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peerResolver().setNodeName(node);
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peerResolver().setServiceName(service);
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peerResolver().setFamily(KResolver::KnownFamily);
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localResolver().setFamily(KResolver::KnownFamily);
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setSocketOptions(socketOptions() & ~Blocking);
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TQObject::connect(&d->timer, TQT_SIGNAL(timeout()), this, TQT_SLOT(timeoutSlot()));
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}
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KStreamSocket::~KStreamSocket()
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{
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delete d;
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// KClientSocketBase's destructor closes the socket
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}
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int KStreamSocket::timeout() const
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{
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return d->timeout;
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}
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int KStreamSocket::remainingTimeout() const
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{
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if (state() != Connecting)
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return timeout();
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if (timeout() <= 0)
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return 0;
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return timeout() - d->startTime.elapsed();
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}
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void KStreamSocket::setTimeout(int msecs)
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{
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d->timeout = msecs;
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if (state() == Connecting)
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d->timer.changeInterval(msecs);
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}
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bool KStreamSocket::bind(const TQString& node, const TQString& service)
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{
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if (state() != Idle)
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return false;
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if (!node.isNull())
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localResolver().setNodeName(node);
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if (!service.isNull())
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localResolver().setServiceName(service);
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return true;
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}
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bool KStreamSocket::connect(const TQString& node, const TQString& service)
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{
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if (state() == Connected)
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return true; // already connected
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if (state() > Connected)
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return false; // can't do much here
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if (!node.isNull())
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peerResolver().setNodeName(node);
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if (!service.isNull())
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peerResolver().setServiceName(service);
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if (state() == Connecting && !blocking())
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{
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setError(IO_ConnectError, InProgress);
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emit gotError(InProgress);
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return true; // we're already connecting
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}
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if (state() < HostFound)
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{
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// connection hasn't started yet
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if (!blocking())
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{
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QObject::connect(this, TQT_SIGNAL(hostFound()), TQT_SLOT(hostFoundSlot()));
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return lookup();
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}
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// blocking mode
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if (!lookup())
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return false; // lookup failure
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}
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/*
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* lookup results are available here
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*/
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if (timeout() > 0)
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{
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if (!blocking() && !d->timer.isActive())
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d->timer.start(timeout(), true);
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else
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{
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// blocking connection with timeout
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// this must be handled as a special case because it requires a
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// non-blocking socket
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d->timer.stop(); // no need for a timer here
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socketDevice()->setBlocking(false);
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while (true)
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{
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connectionEvent();
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if (state() < Connecting)
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return false; // error connecting
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if (state() == Connected)
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return true; // connected!
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if (remainingTimeout() <= 0)
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{
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// we've timed out
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timeoutSlot();
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return false;
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}
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if (socketDevice()->error() == InProgress)
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{
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bool timedout;
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socketDevice()->poll(remainingTimeout(), &timedout);
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if (timedout)
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{
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timeoutSlot();
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return false;
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}
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}
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}
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}
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}
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connectionEvent();
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return error() == NoError;
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}
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bool KStreamSocket::connect(const KResolverEntry& entry)
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{
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return KClientSocketBase::connect(entry);
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}
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void KStreamSocket::hostFoundSlot()
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{
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QObject::disconnect(this, TQT_SLOT(hostFoundSlot()));
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if (timeout() > 0)
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d->timer.start(timeout(), true);
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TQTimer::singleShot(0, this, TQT_SLOT(connectionEvent()));
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}
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void KStreamSocket::connectionEvent()
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{
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if (state() != HostFound && state() != Connecting)
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return; // nothing to do
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const KResolverResults& peer = peerResults();
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if (state() == HostFound)
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{
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d->startTime.start();
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setState(Connecting);
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emit stateChanged(Connecting);
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d->peer = peer.begin();
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d->local = localResults().begin(); // just to be on the safe side
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}
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while (d->peer != peer.end())
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{
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const KResolverEntry &r = *d->peer;
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if (socketDevice()->socket() != -1)
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{
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// we have an existing file descriptor
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// this means that we've got activity in it (connection result)
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if (socketDevice()->connect(r) && socketDevice()->error() == NoError)
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{
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// yes, it did connect!
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connectionSucceeded(r);
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return;
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}
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else if (socketDevice()->error() == InProgress)
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// nope, still in progress
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return;
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// no, the socket failed to connect
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copyError();
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socketDevice()->close();
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++d->peer;
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continue;
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}
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// try to bind
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if (!bindLocallyFor(r))
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{
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// could not find a matching family
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++d->peer;
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continue;
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}
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{
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bool skip = false;
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emit aboutToConnect(r, skip);
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if (skip)
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{
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++d->peer;
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continue;
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}
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}
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if (socketDevice()->connect(r) || socketDevice()->error() == InProgress)
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{
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// socket is attempting to connect
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if (socketDevice()->error() == InProgress)
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{
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TQSocketNotifier *n = socketDevice()->readNotifier();
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TQObject::connect(n, TQT_SIGNAL(activated(int)),
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this, TQT_SLOT(connectionEvent()));
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n->setEnabled(true);
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n = socketDevice()->writeNotifier();
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TQObject::connect(n, TQT_SIGNAL(activated(int)),
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this, TQT_SLOT(connectionEvent()));
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n->setEnabled(true);
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return; // wait for activity
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}
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// socket has connected
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connectionSucceeded(r);
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return;
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}
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// connection failed
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// try next
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copyError();
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socketDevice()->close();
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++d->peer;
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}
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// that was the last item
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socketDevice()->setSocketOptions(socketOptions());
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setState(Idle);
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emit stateChanged(Idle);
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emit gotError(error());
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return;
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}
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void KStreamSocket::timeoutSlot()
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{
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if (state() != Connecting)
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return;
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// halt the connections
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socketDevice()->close(); // this also kills the notifiers
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setError(IO_TimeOutError, Timeout);
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setState(HostFound);
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emit stateChanged(HostFound);
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TQGuardedPtr<KStreamSocket> that = this;
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emit gotError(Timeout);
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if (!that.isNull())
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emit timedOut();
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}
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bool KStreamSocket::bindLocallyFor(const KResolverEntry& peer)
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{
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const KResolverResults& local = localResults();
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if (local.isEmpty())
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// user doesn't want to bind to any specific local address
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return true;
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bool foundone = false;
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// scan the local resolution for a matching family
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for (d->local = local.begin(); d->local != local.end(); ++d->local)
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if ((*d->local).family() == peer.family())
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{
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// found a suitable address!
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foundone = true;
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if (socketDevice()->bind(*d->local))
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return true;
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}
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if (!foundone)
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{
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// found nothing
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setError(IO_BindError, NotSupported);
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emit gotError(NotSupported);
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}
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else
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copyError();
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return false;
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}
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void KStreamSocket::connectionSucceeded(const KResolverEntry& peer)
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{
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TQObject::disconnect(socketDevice()->readNotifier(), 0, this, TQT_SLOT(connectionEvent()));
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TQObject::disconnect(socketDevice()->writeNotifier(), 0, this, TQT_SLOT(connectionEvent()));
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resetError();
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setFlags(IO_Sequential | IO_Raw | IO_ReadWrite | IO_Open | IO_Async);
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setState(Connected);
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socketDevice()->setSocketOptions(socketOptions());
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d->timer.stop();
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emit stateChanged(Connected);
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if (!localResults().isEmpty())
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emit bound(*d->local);
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emit connected(peer);
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}
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#include "kstreamsocket.moc"
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