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/*
* libjingle
* Copyright 2004--2005, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef TALK_BASE_ASYNCPACKETSOCKET_H_
#define TALK_BASE_ASYNCPACKETSOCKET_H_
#include "talk/base/sigslot.h"
#include "talk/base/socket.h"
namespace talk_base {
// Provides the ability to receive packets asynchronously. Sends are not
// buffered since it is acceptable to drop packets under high load.
class AsyncPacketSocket : public sigslot::has_slots<> {
public:
AsyncPacketSocket() { }
virtual ~AsyncPacketSocket() { }
// Returns current local address. If port or IP address is not
// assigned yet, then they set to 0 in the result and |allocated| is
// set to false. Otherwise |allocated| is set to true.
virtual SocketAddress GetLocalAddress(bool* allocated) const = 0;
// Returns remote address. Returns zeroes if this is not a client TCP socket.
virtual SocketAddress GetRemoteAddress() const = 0;
// Send a packet.
virtual int Send(const void *pv, size_t cb) = 0;
virtual int SendTo(const void *pv, size_t cb, const SocketAddress& addr) = 0;
// Close the socket.
virtual int Close() = 0;
// Returns current state of the socket.
virtual Socket::ConnState GetState() const = 0;
// Get/set options.
virtual int GetOption(Socket::Option opt, int* value) = 0;
virtual int SetOption(Socket::Option opt, int value) = 0;
// Get/Set current error.
// TODO: Do we really need SetError() here?
virtual int GetError() const = 0;
virtual void SetError(int error) = 0;
// Emitted after address for the socket is allocated.
sigslot::signal2<AsyncPacketSocket*, const SocketAddress&> SignalAddressReady;
// Emitted each time a packet is read. Used only for UDP and
// connected TCP sockets.
sigslot::signal4<AsyncPacketSocket*, const char*, size_t,
const SocketAddress&> SignalReadPacket;
// Used only for connected TCP sockets.
sigslot::signal1<AsyncPacketSocket*> SignalConnect;
sigslot::signal2<AsyncPacketSocket*, int> SignalClose;
// Used only for listening TCP sockets.
sigslot::signal2<AsyncPacketSocket*, AsyncPacketSocket*> SignalNewConnection;
private:
DISALLOW_EVIL_CONSTRUCTORS(AsyncPacketSocket);
};
} // namespace talk_base
#endif // TALK_BASE_ASYNCPACKETSOCKET_H_
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