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284 lines
7.1 KiB
284 lines
7.1 KiB
/*
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* Copyright (C) 2003,2004 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 <sys/types.h>
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#include <sys/socket.h>
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#include "tdesocketaddress.h"
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#include "kresolver.h"
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#include "tdesocketdevice.h"
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#include "kdatagramsocket.h"
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using namespace KNetwork;
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/*
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* TODO:
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*
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* don't use signals and slots to track state changes: use stateChanging
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*
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*/
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KDatagramSocket::KDatagramSocket(TQObject* parent, const char *name)
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: KClientSocketBase(parent, name), d(0L)
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{
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peerResolver().setFamily(KResolver::KnownFamily);
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localResolver().setFamily(KResolver::KnownFamily);
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peerResolver().setSocketType(SOCK_DGRAM);
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localResolver().setSocketType(SOCK_DGRAM);
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localResolver().setFlags(KResolver::Passive);
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// TQObject::connect(localResolver(), TQT_SIGNAL(finished(KResolverResults)),
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// this, TQT_SLOT(lookupFinishedLocal()));
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TQObject::connect(&peerResolver(), TQT_SIGNAL(finished(KResolverResults)),
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this, TQT_SLOT(lookupFinishedPeer()));
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TQObject::connect(this, TQT_SIGNAL(hostFound()), this, TQT_SLOT(lookupFinishedLocal()));
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}
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KDatagramSocket::~KDatagramSocket()
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{
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// KClientSocketBase's destructor closes the socket
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//delete d;
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}
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bool KDatagramSocket::bind(const TQString& node, const TQString& service)
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{
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if (state() >= Bound)
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return false;
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if (localResolver().isRunning())
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localResolver().cancel(false);
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// no, we must do a host lookup
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localResolver().setAddress(node, service);
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if (!lookup())
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return false;
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// see if lookup has finished already
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// this also catches blocking mode, since lookup has to finish
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// its processing if we're in blocking mode
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if (state() > HostLookup)
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return doBind();
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return true;
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}
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bool KDatagramSocket::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 (peerResolver().nodeName() != node ||
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peerResolver().serviceName() != service)
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peerResolver().setAddress(node, service); // this resets the resolver's state
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// KClientSocketBase::lookup only works if the state is Idle or HostLookup
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// therefore, we store the old state, call the lookup routine and then set
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// it back.
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SocketState s = state();
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setState(s == Connecting ? HostLookup : Idle);
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bool ok = lookup();
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if (!ok)
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{
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setState(s); // go back
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return false;
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}
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// check if lookup is finished
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// if we're in blocking mode, then the lookup has to be finished
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if (state() == HostLookup)
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{
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// it hasn't finished
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setState(Connecting);
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emit stateChanged(Connecting);
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return true;
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}
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// it has to be finished here
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if (state() != Connected)
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{
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setState(Connecting);
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emit stateChanged(Connecting);
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lookupFinishedPeer();
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}
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return state() == Connected;
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}
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KDatagramPacket KDatagramSocket::receive()
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{
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TQ_LONG size = bytesAvailable();
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if (size == 0)
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{
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// nothing available yet to read
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// wait for data if we're not blocking
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if (blocking())
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socketDevice()->waitForMore(-1); // wait forever
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else
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{
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// mimic error
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setError(IO_ReadError, WouldBlock);
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emit gotError(WouldBlock);
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return KDatagramPacket();
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}
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// try again
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size = bytesAvailable();
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}
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TQByteArray data(size);
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TDESocketAddress address;
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// now do the reading
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size = tqreadBlock(data.data(), size, address);
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if (size < 0)
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// error has been set
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return KDatagramPacket();
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data.resize(size); // just to be sure
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return KDatagramPacket(data, address);
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}
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TQ_LONG KDatagramSocket::send(const KDatagramPacket& packet)
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{
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return tqwriteBlock(packet.data(), packet.size(), packet.address());
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}
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TQ_LONG KDatagramSocket::tqwriteBlock(const char *data, TQ_ULONG len, const TDESocketAddress& to)
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{
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if (to.family() != AF_UNSPEC)
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{
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// make sure the socket is open at this point
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if (!socketDevice()->isOpen())
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// error handling will happen below
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socketDevice()->create(to.family(), SOCK_DGRAM, 0);
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}
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return KClientSocketBase::tqwriteBlock(data, len, to);
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}
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void KDatagramSocket::lookupFinishedLocal()
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{
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// bind lookup has finished and succeeded
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// state() == HostFound
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if (!doBind())
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return; // failed binding
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if (peerResults().count() > 0)
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{
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setState(Connecting);
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emit stateChanged(Connecting);
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lookupFinishedPeer();
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}
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}
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void KDatagramSocket::lookupFinishedPeer()
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{
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// this function is called by lookupFinishedLocal above
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// and is also connected to a signal
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// so it might be called twice.
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if (state() != Connecting)
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return;
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if (peerResults().count() == 0)
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{
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setState(Unconnected);
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emit stateChanged(Unconnected);
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return;
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}
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KResolverResults::ConstIterator it = peerResults().begin();
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for ( ; it != peerResults().end(); ++it)
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if (connect(*it))
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{
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// weee, we connected
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setState(Connected); // this sets up signals
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//setupSignals(); // setState sets up the signals
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emit stateChanged(Connected);
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emit connected(*it);
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return;
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}
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// no connection
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copyError();
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setState(Unconnected);
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emit stateChanged(Unconnected);
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emit gotError(error());
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}
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bool KDatagramSocket::doBind()
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{
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if (localResults().count() == 0)
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return true;
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if (state() >= Bound)
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return true; // already bound
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KResolverResults::ConstIterator it = localResults().begin();
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for ( ; it != localResults().end(); ++it)
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if (bind(*it))
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{
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// bound
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setupSignals();
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return true;
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}
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// not bound
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// no need to set state since it can only be HostFound already
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copyError();
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emit gotError(error());
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return false;
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}
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void KDatagramSocket::setupSignals()
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{
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TQSocketNotifier *n = socketDevice()->readNotifier();
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if (n)
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{
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n->setEnabled(emitsReadyRead());
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TQObject::connect(n, TQT_SIGNAL(activated(int)), this, TQT_SLOT(slotReadActivity()));
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}
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else
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return;
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n = socketDevice()->writeNotifier();
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if (n)
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{
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n->setEnabled(emitsReadyWrite());
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TQObject::connect(n, TQT_SIGNAL(activated(int)), this, TQT_SLOT(slotWriteActivity()));
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}
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else
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return;
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}
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#include "kdatagramsocket.moc"
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