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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>
#include "base/basictypes.h"
#include "webkit/glue/webkit_glue_export.h"
namespace net {
class Socket;
} // namespace net
namespace WebKit {
class WebFrame;
} // namespace WebKit
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 WEBKIT_GLUE_EXPORT Config {
Config();
~Config();
// STUN server address and port.
std::string stun_server;
int stun_server_port;
// Relay server address and port.
std::string relay_server;
int relay_server_port;
// Relay server username.
std::string relay_username;
// Relay server password.
std::string relay_password;
// When set to true relay is a legacy Google relay (not TURN
// compliant).
bool legacy_relay;
// 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;
// Disable TCP-based transport when set to true.
bool disable_tcp_transport;
};
virtual ~P2PTransport() {}
// Initialize transport using specified configuration. |web_frame|
// is used to make HTTP requests to relay servers. Returns true
// if initialization succeeded.
virtual bool Init(WebKit::WebFrame* web_frame,
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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