1 /* 2 * libjingle 3 * Copyright 2004--2005, Google Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef TALK_BASE_ASYNCPACKETSOCKET_H_ 29 #define TALK_BASE_ASYNCPACKETSOCKET_H_ 30 31 #include "talk/base/sigslot.h" 32 #include "talk/base/socket.h" 33 34 namespace talk_base { 35 36 // Provides the ability to receive packets asynchronously. Sends are not 37 // buffered since it is acceptable to drop packets under high load. 38 class AsyncPacketSocket : public sigslot::has_slots<> { 39 public: 40 AsyncPacketSocket() { } 41 virtual ~AsyncPacketSocket() { } 42 43 // Returns current local address. If port or IP address is not 44 // assigned yet, then they set to 0 in the result and |allocated| is 45 // set to false. Otherwise |allocated| is set to true. 46 virtual SocketAddress GetLocalAddress(bool* allocated) const = 0; 47 48 // Returns remote address. Returns zeroes if this is not a client TCP socket. 49 virtual SocketAddress GetRemoteAddress() const = 0; 50 51 // Send a packet. 52 virtual int Send(const void *pv, size_t cb) = 0; 53 virtual int SendTo(const void *pv, size_t cb, const SocketAddress& addr) = 0; 54 55 // Close the socket. 56 virtual int Close() = 0; 57 58 // Returns current state of the socket. 59 virtual Socket::ConnState GetState() const = 0; 60 61 // Get/set options. 62 virtual int GetOption(Socket::Option opt, int* value) = 0; 63 virtual int SetOption(Socket::Option opt, int value) = 0; 64 65 // Get/Set current error. 66 // TODO: Do we really need SetError() here? 67 virtual int GetError() const = 0; 68 virtual void SetError(int error) = 0; 69 70 // Emitted after address for the socket is allocated. 71 sigslot::signal2<AsyncPacketSocket*, const SocketAddress&> SignalAddressReady; 72 73 // Emitted each time a packet is read. Used only for UDP and 74 // connected TCP sockets. 75 sigslot::signal4<AsyncPacketSocket*, const char*, size_t, 76 const SocketAddress&> SignalReadPacket; 77 78 // Used only for connected TCP sockets. 79 sigslot::signal1<AsyncPacketSocket*> SignalConnect; 80 sigslot::signal2<AsyncPacketSocket*, int> SignalClose; 81 82 // Used only for listening TCP sockets. 83 sigslot::signal2<AsyncPacketSocket*, AsyncPacketSocket*> SignalNewConnection; 84 85 private: 86 DISALLOW_EVIL_CONSTRUCTORS(AsyncPacketSocket); 87 }; 88 89 } // namespace talk_base 90 91 #endif // TALK_BASE_ASYNCPACKETSOCKET_H_ 92
