Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdelibs@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 886 insertions, 0 deletions

diff --git a/kdecore/network/ksocketdevice.cpp b/kdecore/network/ksocketdevice.cpp
new file mode 100644
index 000000000..b3004ccc2
--- /dev/null
+++ b/kdecore/network/ksocketdevice.cpp
@@ -0,0 +1,886 @@
+/*  -*- C++ -*-
+ *  Copyright (C) 2003,2005 Thiago Macieira <thiago.macieira@kdemail.net>
+ *
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining
+ *  a copy of this software and associated documentation files (the
+ *  "Software"), to deal in the Software without restriction, including
+ *  without limitation the rights to use, copy, modify, merge, publish,
+ *  distribute, sublicense, and/or sell copies of the Software, and to
+ *  permit persons to whom the Software is furnished to do so, subject to
+ *  the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included
+ *  in all copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <config.h>
+
+#include <qmap.h>
+
+#ifdef USE_SOLARIS
+# include <sys/filio.h>
+#endif
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <netinet/in.h>
+#include <unistd.h>
+
+#ifdef HAVE_POLL
+# include <sys/poll.h>
+#else
+# ifdef HAVE_SYS_SELECT
+#  include <sys/select.h>
+# endif
+#endif
+
+// Include syssocket before our local includes
+#include "syssocket.h"
+
+#include <qmutex.h>
+#include <qsocketnotifier.h>
+
+#include "kresolver.h"
+#include "ksocketaddress.h"
+#include "ksocketbase.h"
+#include "ksocketdevice.h"
+#include "ksockssocketdevice.h"
+
+using namespace KNetwork;
+
+class KNetwork::KSocketDevicePrivate
+{
+public:
+  mutable QSocketNotifier *input, *output, *exception;
+  KSocketAddress local, peer;
+  int af;
+
+  inline KSocketDevicePrivate()
+  {
+    input = output = exception = 0L;
+    af = 0;
+  }
+};
+
+
+KSocketDevice::KSocketDevice(const KSocketBase* parent)
+  : m_sockfd(-1), d(new KSocketDevicePrivate)
+{
+  setSocketDevice(this);
+  if (parent)
+    setSocketOptions(parent->socketOptions());
+}
+
+KSocketDevice::KSocketDevice(int fd)
+  : m_sockfd(fd), d(new KSocketDevicePrivate)
+{
+  setState(IO_Open);
+  setFlags(IO_Sequential | IO_Raw | IO_ReadWrite);
+  setSocketDevice(this);
+  d->af = localAddress().family();
+}
+
+KSocketDevice::KSocketDevice(bool, const KSocketBase* parent)
+  : m_sockfd(-1), d(new KSocketDevicePrivate)
+{
+  // do not set parent
+  if (parent)
+    setSocketOptions(parent->socketOptions());
+}
+
+KSocketDevice::~KSocketDevice()
+{
+  close();			// deletes the notifiers
+  unsetSocketDevice(); 		// prevent double deletion
+  delete d;
+}
+
+bool KSocketDevice::setSocketOptions(int opts)
+{
+  // must call parent
+  QMutexLocker locker(mutex());
+  KSocketBase::setSocketOptions(opts);
+
+  if (m_sockfd == -1)
+    return true;		// flags are stored
+
+    {
+      int fdflags = fcntl(m_sockfd, F_GETFL, 0);
+      if (fdflags == -1)
+	{
+	  setError(IO_UnspecifiedError, UnknownError);
+	  return false;		// error
+	}
+
+      if (opts & Blocking)
+	fdflags &= ~O_NONBLOCK;
+      else
+	fdflags |= O_NONBLOCK;
+
+      if (fcntl(m_sockfd, F_SETFL, fdflags) == -1)
+	{
+	  setError(IO_UnspecifiedError, UnknownError);
+	  return false;		// error
+	}
+    }
+
+    {
+      int on = opts & AddressReuseable ? 1 : 0;
+      if (setsockopt(m_sockfd, SOL_SOCKET, SO_REUSEADDR, (char*)&on, sizeof(on)) == -1)
+	{
+	  setError(IO_UnspecifiedError, UnknownError);
+	  return false;		// error
+	}
+    }
+
+#if defined(IPV6_V6ONLY) && defined(AF_INET6)
+  if (d->af == AF_INET6)
+    {
+      // don't try this on non-IPv6 sockets, or we'll get an error
+
+      int on = opts & IPv6Only ? 1 : 0;
+      if (setsockopt(m_sockfd, IPPROTO_IPV6, IPV6_V6ONLY, (char*)&on, sizeof(on)) == -1)
+	{
+	  setError(IO_UnspecifiedError, UnknownError);
+	  return false;		// error
+	}
+    }
+#endif
+
+   {
+     int on = opts & Broadcast ? 1 : 0;
+     if (setsockopt(m_sockfd, SOL_SOCKET, SO_BROADCAST, (char*)&on, sizeof(on)) == -1)
+       {
+	 setError(IO_UnspecifiedError, UnknownError);
+	 return false;		// error
+       }
+   }
+
+  return true;			// all went well
+}
+
+bool KSocketDevice::open(int)
+{
+  resetError();
+  return false;
+}
+
+void KSocketDevice::close()
+{
+  resetError();
+  if (m_sockfd != -1)
+    {
+      delete d->input;
+      delete d->output;
+      delete d->exception;
+
+      d->input = d->output = d->exception = 0L;
+
+      d->local.setFamily(AF_UNSPEC);
+      d->peer.setFamily(AF_UNSPEC);
+
+      ::close(m_sockfd);
+    }
+  setState(0);
+
+  m_sockfd = -1;
+}
+
+bool KSocketDevice::create(int family, int type, int protocol)
+{
+  resetError();
+
+  if (m_sockfd != -1)
+    {
+      // it's already created!
+      setError(IO_SocketCreateError, AlreadyCreated);
+      return false;
+    }
+
+  // no socket yet; we have to create it
+  m_sockfd = kde_socket(family, type, protocol);
+
+  if (m_sockfd == -1)
+    {
+      setError(IO_SocketCreateError, NotSupported);
+      return false;
+    }
+
+  d->af = family;
+  setSocketOptions(socketOptions());
+  setState(IO_Open);
+  return true;		// successfully created
+}
+
+bool KSocketDevice::create(const KResolverEntry& address)
+{
+  return create(address.family(), address.socketType(), address.protocol());
+}
+
+bool KSocketDevice::bind(const KResolverEntry& address)
+{
+  resetError();
+
+  if (m_sockfd == -1 && !create(address))
+    return false;		// failed creating
+
+  // we have a socket, so try and bind
+  if (kde_bind(m_sockfd, address.address(), address.length()) == -1)
+    {
+      if (errno == EADDRINUSE)
+	setError(IO_BindError, AddressInUse);
+      else if (errno == EINVAL)
+	setError(IO_BindError, AlreadyBound);
+      else
+	// assume the address is the cause
+	setError(IO_BindError, NotSupported);
+      return false;
+    }
+
+  return true;
+}
+
+bool KSocketDevice::listen(int backlog)
+{
+  if (m_sockfd != -1)
+    {
+      if (kde_listen(m_sockfd, backlog) == -1)
+	{
+	  setError(IO_ListenError, NotSupported);
+	  return false;
+	}
+
+      resetError();
+      setFlags(IO_Sequential | IO_Raw | IO_ReadWrite);
+      return true;
+    }
+
+  // we don't have a socket
+  // can't listen
+  setError(IO_ListenError, NotCreated);
+  return false;
+}
+
+bool KSocketDevice::connect(const KResolverEntry& address)
+{
+  resetError();
+
+  if (m_sockfd == -1 && !create(address))
+    return false;		// failed creating!
+
+  if (kde_connect(m_sockfd, address.address(), address.length()) == -1)
+    {
+      if (errno == EISCONN)
+	return true;		// we're already connected
+      else if (errno == EALREADY || errno == EINPROGRESS)
+	{
+	  setError(IO_ConnectError, InProgress);
+	  return true;
+	}
+      else if (errno == ECONNREFUSED)
+	setError(IO_ConnectError, ConnectionRefused);
+      else if (errno == ENETDOWN || errno == ENETUNREACH ||
+	       errno == ENETRESET || errno == ECONNABORTED ||
+	       errno == ECONNRESET || errno == EHOSTDOWN ||
+	       errno == EHOSTUNREACH)
+	setError(IO_ConnectError, NetFailure);
+      else
+	setError(IO_ConnectError, NotSupported);
+
+      return false;
+    }
+
+  setFlags(IO_Sequential | IO_Raw | IO_ReadWrite);
+  return true;			// all is well
+}
+
+KSocketDevice* KSocketDevice::accept()
+{
+  if (m_sockfd == -1)
+    {
+      // can't accept without a socket
+      setError(IO_AcceptError, NotCreated);
+      return 0L;
+    }
+
+  struct sockaddr sa;
+  socklen_t len = sizeof(sa);
+  int newfd = kde_accept(m_sockfd, &sa, &len);
+  if (newfd == -1)
+    {
+      if (errno == EAGAIN || errno == EWOULDBLOCK)
+	setError(IO_AcceptError, WouldBlock);
+      else
+	setError(IO_AcceptError, UnknownError);
+      return NULL;
+    }
+
+  return new KSocketDevice(newfd);
+}
+
+bool KSocketDevice::disconnect()
+{
+  resetError();
+
+  if (m_sockfd == -1)
+    return false;		// can't create
+
+  KSocketAddress address;
+  address.setFamily(AF_UNSPEC);
+  if (kde_connect(m_sockfd, address.address(), address.length()) == -1)
+    {
+      if (errno == EALREADY || errno == EINPROGRESS)
+	{
+	  setError(IO_ConnectError, InProgress);
+	  return false;
+	}
+      else if (errno == ECONNREFUSED)
+	setError(IO_ConnectError, ConnectionRefused);
+      else if (errno == ENETDOWN || errno == ENETUNREACH ||
+	       errno == ENETRESET || errno == ECONNABORTED ||
+	       errno == ECONNRESET || errno == EHOSTDOWN ||
+	       errno == EHOSTUNREACH)
+	setError(IO_ConnectError, NetFailure);
+      else
+	setError(IO_ConnectError, NotSupported);
+
+      return false;
+    }
+
+  setFlags(IO_Sequential | IO_Raw | IO_ReadWrite);
+  setState(IO_Open);
+  return true;			// all is well
+}
+
+Q_LONG KSocketDevice::bytesAvailable() const
+{
+  if (m_sockfd == -1)
+    return -1;			// there's nothing to read in a closed socket
+
+  int nchars;
+  if (ioctl(m_sockfd, FIONREAD, &nchars) == -1)
+    return -1;			// error!
+
+  return nchars;
+}
+
+Q_LONG KSocketDevice::waitForMore(int msecs, bool *timeout)
+{
+  if (m_sockfd == -1)
+    return -1;			// there won't ever be anything to read...
+
+  bool input;
+  if (!poll(&input, 0, 0, msecs, timeout))
+    return -1;			// failed polling
+
+  return bytesAvailable();
+}
+
+static int do_read_common(int sockfd, char *data, Q_ULONG maxlen, KSocketAddress* from, ssize_t &retval, bool peek = false)
+{
+  socklen_t len;
+  if (from)
+    {
+      from->setLength(len = 128); // arbitrary length
+      retval = ::recvfrom(sockfd, data, maxlen, peek ? MSG_PEEK : 0, from->address(), &len);
+    }
+  else
+    retval = ::recvfrom(sockfd, data, maxlen, peek ? MSG_PEEK : 0, NULL, NULL);
+
+  if (retval == -1)
+    {
+      if (errno == EAGAIN || errno == EWOULDBLOCK)
+	return KSocketDevice::WouldBlock;
+      else
+	return KSocketDevice::UnknownError;
+    }
+  if (retval == 0)
+    return KSocketDevice::RemotelyDisconnected;
+
+  if (from)
+    from->setLength(len);
+  return 0;
+}
+
+Q_LONG KSocketDevice::readBlock(char *data, Q_ULONG maxlen)
+{
+  resetError();
+  if (m_sockfd == -1)
+    return -1;
+
+  if (maxlen == 0 || data == 0L)
+    return 0;			// can't read
+
+  ssize_t retval;
+  int err = do_read_common(m_sockfd, data, maxlen, 0L, retval);
+
+  if (err)
+    {
+      setError(IO_ReadError, static_cast<SocketError>(err));
+      return -1;
+    }
+
+  return retval;
+}
+
+Q_LONG KSocketDevice::readBlock(char *data, Q_ULONG maxlen, KSocketAddress &from)
+{
+  resetError();
+  if (m_sockfd == -1)
+    return -1;			// nothing to do here
+
+  if (data == 0L || maxlen == 0)
+    return 0;			// user doesn't want to read
+
+  ssize_t retval;
+  int err = do_read_common(m_sockfd, data, maxlen, &from, retval);
+
+  if (err)
+    {
+      setError(IO_ReadError, static_cast<SocketError>(err));
+      return -1;
+    }
+
+  return retval;
+}
+
+Q_LONG KSocketDevice::peekBlock(char *data, Q_ULONG maxlen)
+{
+  resetError();
+  if (m_sockfd == -1)
+    return -1;
+
+  if (maxlen == 0 || data == 0L)
+    return 0;			// can't read
+
+  ssize_t retval;
+  int err = do_read_common(m_sockfd, data, maxlen, 0L, retval, true);
+
+  if (err)
+    {
+      setError(IO_ReadError, static_cast<SocketError>(err));
+      return -1;
+    }
+
+  return retval;
+}
+
+Q_LONG KSocketDevice::peekBlock(char *data, Q_ULONG maxlen, KSocketAddress& from)
+{
+  resetError();
+  if (m_sockfd == -1)
+    return -1;			// nothing to do here
+
+  if (data == 0L || maxlen == 0)
+    return 0;			// user doesn't want to read
+
+  ssize_t retval;
+  int err = do_read_common(m_sockfd, data, maxlen, &from, retval, true);
+
+  if (err)
+    {
+      setError(IO_ReadError, static_cast<SocketError>(err));
+      return -1;
+    }
+
+  return retval;
+}
+
+Q_LONG KSocketDevice::writeBlock(const char *data, Q_ULONG len)
+{
+  return writeBlock(data, len, KSocketAddress());
+}
+
+Q_LONG KSocketDevice::writeBlock(const char *data, Q_ULONG len, const KSocketAddress& to)
+{
+  resetError();
+  if (m_sockfd == -1)
+    return -1;			// can't write to unopen socket
+
+  if (data == 0L || len == 0)
+    return 0;			// nothing to be written
+
+  ssize_t retval = ::sendto(m_sockfd, data, len, 0, to.address(), to.length());
+  if (retval == -1)
+    {
+      if (errno == EAGAIN || errno == EWOULDBLOCK)
+	setError(IO_WriteError, WouldBlock);
+      else
+	setError(IO_WriteError, UnknownError);
+      return -1;		// nothing written
+    }
+  else if (retval == 0)
+    setError(IO_WriteError, RemotelyDisconnected);
+
+  return retval;
+}
+
+KSocketAddress KSocketDevice::localAddress() const
+{
+  if (m_sockfd == -1)
+    return KSocketAddress();	// not open, empty value
+
+  if (d->local.family() != AF_UNSPEC)
+    return d->local;
+
+  socklen_t len;
+  KSocketAddress localAddress;
+  localAddress.setLength(len = 32);	// arbitrary value
+  if (kde_getsockname(m_sockfd, localAddress.address(), &len) == -1)
+    // error!
+    return d->local = KSocketAddress();
+
+#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
+  len = localAddress.address()->sa_len;
+#endif
+
+  if (len <= localAddress.length())
+    {
+      // it has fit already
+      localAddress.setLength(len);
+      return d->local = localAddress;
+    }
+
+  // no, the socket address is actually larger than we had anticipated
+  // call again
+  localAddress.setLength(len);
+  if (kde_getsockname(m_sockfd, localAddress.address(), &len) == -1)
+    // error!
+    return d->local = KSocketAddress();
+
+  return d->local = localAddress;
+}
+
+KSocketAddress KSocketDevice::peerAddress() const
+{
+  if (m_sockfd == -1)
+    return KSocketAddress();	// not open, empty value
+
+  if (d->peer.family() != AF_UNSPEC)
+    return d->peer;
+
+  socklen_t len;
+  KSocketAddress peerAddress;
+  peerAddress.setLength(len = 32);	// arbitrary value
+  if (kde_getpeername(m_sockfd, peerAddress.address(), &len) == -1)
+    // error!
+    return d->peer = KSocketAddress();
+
+#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
+  len = peerAddress.address()->sa_len;
+#endif
+
+  if (len <= peerAddress.length())
+    {
+      // it has fit already
+      peerAddress.setLength(len);
+      return d->peer = peerAddress;
+    }
+
+  // no, the socket address is actually larger than we had anticipated
+  // call again
+  peerAddress.setLength(len);
+  if (kde_getpeername(m_sockfd, peerAddress.address(), &len) == -1)
+    // error!
+    return d->peer = KSocketAddress();
+
+  return d->peer = peerAddress;
+}
+
+KSocketAddress KSocketDevice::externalAddress() const
+{
+  // for normal sockets, the externally visible address is the same
+  // as the local address
+  return localAddress();
+}
+
+QSocketNotifier* KSocketDevice::readNotifier() const
+{
+  if (d->input)
+    return d->input;
+
+  QMutexLocker locker(mutex());
+  if (d->input)
+    return d->input;
+
+  if (m_sockfd == -1)
+    {
+      // socket doesn't exist; can't create notifier
+      return 0L;
+    }
+
+  return d->input = createNotifier(QSocketNotifier::Read);
+}
+
+QSocketNotifier* KSocketDevice::writeNotifier() const
+{
+  if (d->output)
+    return d->output;
+
+  QMutexLocker locker(mutex());
+  if (d->output)
+    return d->output;
+
+  if (m_sockfd == -1)
+    {
+      // socket doesn't exist; can't create notifier
+      return 0L;
+    }
+
+  return d->output = createNotifier(QSocketNotifier::Write);
+}
+
+QSocketNotifier* KSocketDevice::exceptionNotifier() const
+{
+  if (d->exception)
+    return d->exception;
+
+  QMutexLocker locker(mutex());
+  if (d->exception)
+    return d->exception;
+
+  if (m_sockfd == -1)
+    {
+      // socket doesn't exist; can't create notifier
+      return 0L;
+    }
+
+  return d->exception = createNotifier(QSocketNotifier::Exception);
+}
+
+bool KSocketDevice::poll(bool *input, bool *output, bool *exception,
+			 int timeout, bool* timedout)
+{
+  if (m_sockfd == -1)
+    {
+      setError(IO_UnspecifiedError, NotCreated);
+      return false;
+    }
+
+  resetError();
+#ifdef HAVE_POLL
+  struct pollfd fds;
+  fds.fd = m_sockfd;
+  fds.events = 0;
+
+  if (input)
+    {
+      fds.events |= POLLIN;
+      *input = false;
+    }
+  if (output)
+    {
+      fds.events |= POLLOUT;
+      *output = false;
+    }
+  if (exception)
+    {
+      fds.events |= POLLPRI;
+      *exception = false;
+    }
+
+  int retval = ::poll(&fds, 1, timeout);
+  if (retval == -1)
+    {
+      setError(IO_UnspecifiedError, UnknownError);
+      return false;
+    }
+  if (retval == 0)
+    {
+      // timeout
+      if (timedout)
+	*timedout = true;
+      return true;
+    }
+
+  if (input && fds.revents & POLLIN)
+    *input = true;
+  if (output && fds.revents & POLLOUT)
+    *output = true;
+  if (exception && fds.revents & POLLPRI)
+    *exception = true;
+  if (timedout)
+    *timedout = false;
+
+  return true;
+#else
+  /*
+   * We don't have poll(2). We'll have to make do with select(2).
+   */
+
+  fd_set readfds, writefds, exceptfds;
+  fd_set *preadfds = 0L, *pwritefds = 0L, *pexceptfds = 0L;
+
+  if (input)
+    {
+      preadfds = &readfds;
+      FD_ZERO(preadfds);
+      FD_SET(m_sockfd, preadfds);
+      *input = false;
+    }
+  if (output)
+    {
+      pwritefds = &writefds;
+      FD_ZERO(pwritefds);
+      FD_SET(m_sockfd, pwritefds);
+      *output = false;
+    }
+  if (exception)
+    {
+      pexceptfds = &exceptfds;
+      FD_ZERO(pexceptfds);
+      FD_SET(m_sockfd, pexceptfds);
+      *exception = false;
+    }
+
+  int retval;
+  if (timeout < 0)
+    retval = select(m_sockfd + 1, preadfds, pwritefds, pexceptfds, 0L);
+  else
+    {
+      // convert the milliseconds to timeval
+      struct timeval tv;
+      tv.tv_sec = timeout / 1000;
+      tv.tv_usec = timeout % 1000 * 1000;
+
+      retval = select(m_sockfd + 1, preadfds, pwritefds, pexceptfds, &tv);
+    }
+
+  if (retval == -1)
+    {
+      setError(IO_UnspecifiedError, UnknownError);
+      return false;
+    }
+  if (retval == 0)
+    {
+      // timeout
+      if (timedout)
+	*timedout = true;
+      return true;
+    }
+
+  if (input && FD_ISSET(m_sockfd, preadfds))
+    *input = true;
+  if (output && FD_ISSET(m_sockfd, pwritefds))
+    *output = true;
+  if (exception && FD_ISSET(m_sockfd, pexceptfds))
+    *exception = true;
+
+  return true;
+#endif
+}
+
+bool KSocketDevice::poll(int timeout, bool *timedout)
+{
+  bool input, output, exception;
+  return poll(&input, &output, &exception, timeout, timedout);
+}
+
+QSocketNotifier* KSocketDevice::createNotifier(QSocketNotifier::Type type) const
+{
+  if (m_sockfd == -1)
+    return 0L;
+
+  return new QSocketNotifier(m_sockfd, type);
+}
+
+namespace
+{
+  // simple class to avoid pointer stuff
+  template<class T> class ptr
+  {
+    typedef T type;
+    type* obj;
+  public:
+    ptr() : obj(0)
+    { }
+
+    ptr(const ptr<T>& other) : obj(other.obj)
+    { }
+
+    ptr(type* _obj) : obj(_obj)
+    { }
+
+    ~ptr()
+    { }
+
+    ptr<T>& operator=(const ptr<T>& other)
+    { obj = other.obj; return *this; }
+
+    ptr<T>& operator=(T* _obj)
+    { obj = _obj; return  *this; }
+
+    type* operator->() const { return obj; }
+
+    operator T*() const { return obj; }
+
+    bool isNull() const
+    { return obj == 0; }
+  };
+}
+
+static KSocketDeviceFactoryBase* defaultImplFactory;
+static QMutex defaultImplFactoryMutex;
+typedef QMap<int, KSocketDeviceFactoryBase* > factoryMap;
+static factoryMap factories;
+ 
+KSocketDevice* KSocketDevice::createDefault(KSocketBase* parent)
+{
+  KSocketDevice* device = dynamic_cast<KSocketDevice*>(parent);
+  if (device != 0L)
+    return device;
+
+  KSocksSocketDevice::initSocks();
+
+  if (defaultImplFactory)
+    return defaultImplFactory->create(parent);
+
+  // the really default
+  return new KSocketDevice(parent);
+}
+
+KSocketDevice* KSocketDevice::createDefault(KSocketBase* parent, int capabilities)
+{
+  KSocketDevice* device = dynamic_cast<KSocketDevice*>(parent);
+  if (device != 0L)
+    return device;
+
+  QMutexLocker locker(&defaultImplFactoryMutex);
+  factoryMap::ConstIterator it = factories.constBegin();
+  for ( ; it != factories.constEnd(); ++it)
+    if ((it.key() & capabilities) == capabilities)
+      // found a match
+      return it.data()->create(parent);
+
+  return 0L;			// no default
+}
+
+KSocketDeviceFactoryBase*
+KSocketDevice::setDefaultImpl(KSocketDeviceFactoryBase* factory)
+{
+  QMutexLocker locker(&defaultImplFactoryMutex);
+  KSocketDeviceFactoryBase* old = defaultImplFactory;
+  defaultImplFactory = factory;
+  return old;
+}
+
+void KSocketDevice::addNewImpl(KSocketDeviceFactoryBase* factory, int capabilities)
+{
+  QMutexLocker locker(&defaultImplFactoryMutex);
+  if (factories.contains(capabilities))
+    delete factories[capabilities];
+  factories.insert(capabilities, factory);
+}
+