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// Copyright (c) 2010 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 NET_SOCKET_TCP_CLIENT_SOCKET_POOL_H_
#define NET_SOCKET_TCP_CLIENT_SOCKET_POOL_H_
#pragma once
#include <string>
#include "base/basictypes.h"
#include "base/ref_counted.h"
#include "base/scoped_ptr.h"
#include "base/time.h"
#include "base/timer.h"
#include "net/base/host_port_pair.h"
#include "net/base/host_resolver.h"
#include "net/socket/client_socket_pool_base.h"
#include "net/socket/client_socket_pool_histograms.h"
#include "net/socket/client_socket_pool.h"
namespace net {
class ClientSocketFactory;
class TCPSocketParams : public base::RefCounted<TCPSocketParams> {
public:
TCPSocketParams(const HostPortPair& host_port_pair, RequestPriority priority,
const GURL& referrer, bool disable_resolver_cache);
// TODO(willchan): Update all unittests so we don't need this.
TCPSocketParams(const std::string& host, int port, RequestPriority priority,
const GURL& referrer, bool disable_resolver_cache);
const HostResolver::RequestInfo& destination() const { return destination_; }
private:
friend class base::RefCounted<TCPSocketParams>;
~TCPSocketParams();
void Initialize(RequestPriority priority, const GURL& referrer,
bool disable_resolver_cache) {
// The referrer is used by the DNS prefetch system to correlate resolutions
// with the page that triggered them. It doesn't impact the actual addresses
// that we resolve to.
destination_.set_referrer(referrer);
destination_.set_priority(priority);
if (disable_resolver_cache)
destination_.set_allow_cached_response(false);
}
HostResolver::RequestInfo destination_;
DISALLOW_COPY_AND_ASSIGN(TCPSocketParams);
};
// TCPConnectJob handles the host resolution necessary for socket creation
// and the tcp connect.
class TCPConnectJob : public ConnectJob {
public:
TCPConnectJob(const std::string& group_name,
const scoped_refptr<TCPSocketParams>& params,
base::TimeDelta timeout_duration,
ClientSocketFactory* client_socket_factory,
HostResolver* host_resolver,
Delegate* delegate,
NetLog* net_log);
virtual ~TCPConnectJob();
// ConnectJob methods.
virtual LoadState GetLoadState() const;
private:
enum State {
STATE_RESOLVE_HOST,
STATE_RESOLVE_HOST_COMPLETE,
STATE_TCP_CONNECT,
STATE_TCP_CONNECT_COMPLETE,
STATE_NONE,
};
// Begins the host resolution and the TCP connect. Returns OK on success
// and ERR_IO_PENDING if it cannot immediately service the request.
// Otherwise, it returns a net error code.
virtual int ConnectInternal();
void OnIOComplete(int result);
// Runs the state transition loop.
int DoLoop(int result);
int DoResolveHost();
int DoResolveHostComplete(int result);
int DoTCPConnect();
int DoTCPConnectComplete(int result);
scoped_refptr<TCPSocketParams> params_;
ClientSocketFactory* const client_socket_factory_;
CompletionCallbackImpl<TCPConnectJob> callback_;
SingleRequestHostResolver resolver_;
AddressList addresses_;
State next_state_;
// The time Connect() was called.
base::TimeTicks start_time_;
// The time the connect was started (after DNS finished).
base::TimeTicks connect_start_time_;
DISALLOW_COPY_AND_ASSIGN(TCPConnectJob);
};
class TCPClientSocketPool : public ClientSocketPool {
public:
TCPClientSocketPool(
int max_sockets,
int max_sockets_per_group,
ClientSocketPoolHistograms* histograms,
HostResolver* host_resolver,
ClientSocketFactory* client_socket_factory,
NetLog* net_log);
virtual ~TCPClientSocketPool();
// ClientSocketPool methods:
virtual int RequestSocket(const std::string& group_name,
const void* resolve_info,
RequestPriority priority,
ClientSocketHandle* handle,
CompletionCallback* callback,
const BoundNetLog& net_log);
virtual void CancelRequest(const std::string& group_name,
ClientSocketHandle* handle);
virtual void ReleaseSocket(const std::string& group_name,
ClientSocket* socket,
int id);
virtual void Flush();
virtual void CloseIdleSockets();
virtual int IdleSocketCount() const {
return base_.idle_socket_count();
}
virtual int IdleSocketCountInGroup(const std::string& group_name) const;
virtual LoadState GetLoadState(const std::string& group_name,
const ClientSocketHandle* handle) const;
virtual DictionaryValue* GetInfoAsValue(const std::string& name,
const std::string& type,
bool include_nested_pools) const {
return base_.GetInfoAsValue(name, type);
}
virtual base::TimeDelta ConnectionTimeout() const {
return base_.ConnectionTimeout();
}
virtual ClientSocketPoolHistograms* histograms() const {
return base_.histograms();
}
private:
typedef ClientSocketPoolBase<TCPSocketParams> PoolBase;
class TCPConnectJobFactory
: public PoolBase::ConnectJobFactory {
public:
TCPConnectJobFactory(ClientSocketFactory* client_socket_factory,
HostResolver* host_resolver,
NetLog* net_log)
: client_socket_factory_(client_socket_factory),
host_resolver_(host_resolver),
net_log_(net_log) {}
virtual ~TCPConnectJobFactory() {}
// ClientSocketPoolBase::ConnectJobFactory methods.
virtual ConnectJob* NewConnectJob(
const std::string& group_name,
const PoolBase::Request& request,
ConnectJob::Delegate* delegate) const;
virtual base::TimeDelta ConnectionTimeout() const;
private:
ClientSocketFactory* const client_socket_factory_;
HostResolver* const host_resolver_;
NetLog* net_log_;
DISALLOW_COPY_AND_ASSIGN(TCPConnectJobFactory);
};
PoolBase base_;
DISALLOW_COPY_AND_ASSIGN(TCPClientSocketPool);
};
REGISTER_SOCKET_PARAMS_FOR_POOL(TCPClientSocketPool, TCPSocketParams);
} // namespace net
#endif // NET_SOCKET_TCP_CLIENT_SOCKET_POOL_H_
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