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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 CONTENT_RENDERER_P2P_HOST_ADDRESS_REQUEST_H_
#define CONTENT_RENDERER_P2P_HOST_ADDRESS_REQUEST_H_
#include <string>
#include "base/callback.h"
#include "base/memory/ref_counted.h"
#include "content/common/content_export.h"
#include "net/base/net_util.h"
namespace base {
class MessageLoopProxy;
} // namespace base
namespace content {
class P2PSocketDispatcher;
// P2PHostAddressRequest performs DNS hostname resolution. It's used
// to resolve addresses of STUN and relay servers.
//
// TODO(sergeyu): Name of this class may be confusing. Rename it to
// something else, e.g. P2PHostnameResolver.
class CONTENT_EXPORT P2PHostAddressRequest
: public base::RefCountedThreadSafe<P2PHostAddressRequest> {
public:
typedef base::Callback<void(const net::IPAddressNumber&)> DoneCallback;
P2PHostAddressRequest(P2PSocketDispatcher* dispatcher);
// Sends host address request.
void Request(const std::string& host_name,
const DoneCallback& done_callback);
// Cancels the request. The callback passed to Request() will not be
// called after Cancel() is called.
void Cancel();
private:
enum State {
STATE_CREATED,
STATE_SENT,
STATE_FINISHED,
};
friend class P2PSocketDispatcher;
friend class base::RefCountedThreadSafe<P2PHostAddressRequest>;
virtual ~P2PHostAddressRequest();
void DoSendRequest(const std::string& host_name,
const DoneCallback& done_callback);
void DoUnregister();
void OnResponse(const net::IPAddressNumber& address);
void DeliverResponse(const net::IPAddressNumber& address);
P2PSocketDispatcher* dispatcher_;
scoped_refptr<base::MessageLoopProxy> ipc_message_loop_;
scoped_refptr<base::MessageLoopProxy> delegate_message_loop_;
DoneCallback done_callback_;
// State must be accessed from delegate thread only.
State state_;
// Accessed on the IPC thread only.
int32 request_id_;
bool registered_;
DISALLOW_COPY_AND_ASSIGN(P2PHostAddressRequest);
};
} // namespace content
#endif // CONTENT_RENDERER_P2P_HOST_ADDRESS_REQUEST_H_
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