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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef WEBKIT_GLUE_P2P_TRANSPORT_H_
#define WEBKIT_GLUE_P2P_TRANSPORT_H_
#include <string>
#include <vector>
namespace net {
class Socket;
} // namespace net
namespace webkit_glue {
// Interface for P2P transport.
class P2PTransport {
public:
enum State {
STATE_NONE = 0,
STATE_WRITABLE = 1,
STATE_READABLE = 2,
};
enum Protocol {
PROTOCOL_UDP = 0,
PROTOCOL_TCP = 1,
};
class EventHandler {
public:
virtual ~EventHandler() {}
// Called for each local candidate.
virtual void OnCandidateReady(const std::string& address) = 0;
// Called when readable of writable state of the stream changes.
virtual void OnStateChange(State state) = 0;
// Called when an error occures (e.g. TCP handshake
// failed). P2PTransport object is not usable after that and
// should be destroyed.
virtual void OnError(int error) = 0;
};
struct Config {
Config();
~Config();
// STUN server address and port, e.g. "stun.example.com:23542".
std::string stun_server;
int stun_server_port;
// Relay server address and port, e.g. "relay.example.com:4234".
std::string relay_server;
int relay_server_port;
// Relay token to use for relay servers.
std::string relay_token;
// TCP window sizes. Default size is used when set to 0.
int tcp_receive_window;
int tcp_send_window;
// Disables Neagle's algorithm when set to true.
bool tcp_no_delay;
// TCP ACK delay.
int tcp_ack_delay_ms;
};
virtual ~P2PTransport() {}
// Initialize transport using specified configuration. Returns true
// if initialization succeeded.
virtual bool Init(const std::string& name,
Protocol protocol,
const Config& config,
EventHandler* event_handler) = 0;
// Add candidate received from the remote peer. Returns false if the
// provided address is not in a valid format.
virtual bool AddRemoteCandidate(const std::string& address) = 0;
// Returns socket interface that can be used to send/receive
// data. Returned object is owned by the transport. Pending calls on
// the socket are canceled when the transport is destroyed.
virtual net::Socket* GetChannel() = 0;
};
} // namespace webkit_glue
#endif // WEBKIT_GLUE_P2P_TRANSPORT_H_
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