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28 #ifndef TALK_BASE_ASYNCPACKETSOCKET_H_
29 #define TALK_BASE_ASYNCPACKETSOCKET_H_
31 #include "talk/base/dscp.h"
32 #include "talk/base/sigslot.h"
33 #include "talk/base/socket.h"
37 // Provides the ability to receive packets asynchronously. Sends are not
38 // buffered since it is acceptable to drop packets under high load.
39 class AsyncPacketSocket : public sigslot::has_slots<> {
49 AsyncPacketSocket() { }
50 virtual ~AsyncPacketSocket() { }
52 // Returns current local address. Address may be set to NULL if the
53 // socket is not bound yet (GetState() returns STATE_BINDING).
54 virtual SocketAddress GetLocalAddress() const = 0;
56 // Returns remote address. Returns zeroes if this is not a client TCP socket.
57 virtual SocketAddress GetRemoteAddress() const = 0;
60 virtual int Send(const void *pv, size_t cb, DiffServCodePoint dscp) = 0;
61 virtual int SendTo(const void *pv, size_t cb, const SocketAddress& addr,
62 DiffServCodePoint) = 0;
65 virtual int Close() = 0;
67 // Returns current state of the socket.
68 virtual State GetState() const = 0;
71 virtual int GetOption(Socket::Option opt, int* value) = 0;
72 virtual int SetOption(Socket::Option opt, int value) = 0;
74 // Get/Set current error.
75 // TODO: Remove SetError().
76 virtual int GetError() const = 0;
77 virtual void SetError(int error) = 0;
79 // Emitted each time a packet is read. Used only for UDP and
80 // connected TCP sockets.
81 sigslot::signal4<AsyncPacketSocket*, const char*, size_t,
82 const SocketAddress&> SignalReadPacket;
84 // Emitted when the socket is currently able to send.
85 sigslot::signal1<AsyncPacketSocket*> SignalReadyToSend;
87 // Emitted after address for the socket is allocated, i.e. binding
88 // is finished. State of the socket is changed from BINDING to BOUND
89 // (for UDP and server TCP sockets) or CONNECTING (for client TCP
91 sigslot::signal2<AsyncPacketSocket*, const SocketAddress&> SignalAddressReady;
93 // Emitted for client TCP sockets when state is changed from
94 // CONNECTING to CONNECTED.
95 sigslot::signal1<AsyncPacketSocket*> SignalConnect;
97 // Emitted for client TCP sockets when state is changed from
98 // CONNECTED to CLOSED.
99 sigslot::signal2<AsyncPacketSocket*, int> SignalClose;
101 // Used only for listening TCP sockets.
102 sigslot::signal2<AsyncPacketSocket*, AsyncPacketSocket*> SignalNewConnection;
105 DISALLOW_EVIL_CONSTRUCTORS(AsyncPacketSocket);
108 } // namespace talk_base
110 #endif // TALK_BASE_ASYNCPACKETSOCKET_H_