1112c30e1e
R=wu@webrtc.org Review URL: https://webrtc-codereview.appspot.com/2274004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@4818 4adac7df-926f-26a2-2b94-8c16560cd09d
111 lines
4.1 KiB
C++
111 lines
4.1 KiB
C++
/*
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* libjingle
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* Copyright 2004--2005, Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TALK_BASE_ASYNCPACKETSOCKET_H_
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#define TALK_BASE_ASYNCPACKETSOCKET_H_
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#include "talk/base/dscp.h"
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#include "talk/base/sigslot.h"
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#include "talk/base/socket.h"
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namespace talk_base {
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// Provides the ability to receive packets asynchronously. Sends are not
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// buffered since it is acceptable to drop packets under high load.
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class AsyncPacketSocket : public sigslot::has_slots<> {
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public:
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enum State {
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STATE_CLOSED,
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STATE_BINDING,
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STATE_BOUND,
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STATE_CONNECTING,
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STATE_CONNECTED
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};
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AsyncPacketSocket() { }
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virtual ~AsyncPacketSocket() { }
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// Returns current local address. Address may be set to NULL if the
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// socket is not bound yet (GetState() returns STATE_BINDING).
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virtual SocketAddress GetLocalAddress() const = 0;
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// Returns remote address. Returns zeroes if this is not a client TCP socket.
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virtual SocketAddress GetRemoteAddress() const = 0;
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// Send a packet.
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virtual int Send(const void *pv, size_t cb, DiffServCodePoint dscp) = 0;
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virtual int SendTo(const void *pv, size_t cb, const SocketAddress& addr,
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DiffServCodePoint) = 0;
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// Close the socket.
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virtual int Close() = 0;
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// Returns current state of the socket.
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virtual State GetState() const = 0;
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// Get/set options.
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virtual int GetOption(Socket::Option opt, int* value) = 0;
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virtual int SetOption(Socket::Option opt, int value) = 0;
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// Get/Set current error.
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// TODO: Remove SetError().
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virtual int GetError() const = 0;
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virtual void SetError(int error) = 0;
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// Emitted each time a packet is read. Used only for UDP and
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// connected TCP sockets.
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sigslot::signal4<AsyncPacketSocket*, const char*, size_t,
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const SocketAddress&> SignalReadPacket;
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// Emitted when the socket is currently able to send.
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sigslot::signal1<AsyncPacketSocket*> SignalReadyToSend;
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// Emitted after address for the socket is allocated, i.e. binding
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// is finished. State of the socket is changed from BINDING to BOUND
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// (for UDP and server TCP sockets) or CONNECTING (for client TCP
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// sockets).
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sigslot::signal2<AsyncPacketSocket*, const SocketAddress&> SignalAddressReady;
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// Emitted for client TCP sockets when state is changed from
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// CONNECTING to CONNECTED.
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sigslot::signal1<AsyncPacketSocket*> SignalConnect;
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// Emitted for client TCP sockets when state is changed from
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// CONNECTED to CLOSED.
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sigslot::signal2<AsyncPacketSocket*, int> SignalClose;
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// Used only for listening TCP sockets.
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sigslot::signal2<AsyncPacketSocket*, AsyncPacketSocket*> SignalNewConnection;
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private:
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DISALLOW_EVIL_CONSTRUCTORS(AsyncPacketSocket);
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};
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} // namespace talk_base
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#endif // TALK_BASE_ASYNCPACKETSOCKET_H_
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