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// Copyright (c) 2012 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_SOCKS_CLIENT_SOCKET_POOL_H_
#define NET_SOCKET_SOCKS_CLIENT_SOCKET_POOL_H_
#include <string>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/time/time.h"
#include "net/base/host_port_pair.h"
#include "net/dns/host_resolver.h"
#include "net/socket/client_socket_pool.h"
#include "net/socket/client_socket_pool_base.h"
#include "net/socket/client_socket_pool_histograms.h"
namespace net {
class ConnectJobFactory;
class TransportClientSocketPool;
class TransportSocketParams;
class NET_EXPORT_PRIVATE SOCKSSocketParams
: public base::RefCounted<SOCKSSocketParams> {
public:
SOCKSSocketParams(const scoped_refptr<TransportSocketParams>& proxy_server,
bool socks_v5, const HostPortPair& host_port_pair);
const scoped_refptr<TransportSocketParams>& transport_params() const {
return transport_params_;
}
const HostResolver::RequestInfo& destination() const { return destination_; }
bool is_socks_v5() const { return socks_v5_; }
bool ignore_limits() const { return ignore_limits_; }
private:
friend class base::RefCounted<SOCKSSocketParams>;
~SOCKSSocketParams();
// The transport (likely TCP) connection must point toward the proxy server.
const scoped_refptr<TransportSocketParams> transport_params_;
// This is the HTTP destination.
HostResolver::RequestInfo destination_;
const bool socks_v5_;
bool ignore_limits_;
DISALLOW_COPY_AND_ASSIGN(SOCKSSocketParams);
};
// SOCKSConnectJob handles the handshake to a socks server after setting up
// an underlying transport socket.
class SOCKSConnectJob : public ConnectJob {
public:
SOCKSConnectJob(const std::string& group_name,
RequestPriority priority,
const scoped_refptr<SOCKSSocketParams>& params,
const base::TimeDelta& timeout_duration,
TransportClientSocketPool* transport_pool,
HostResolver* host_resolver,
Delegate* delegate,
NetLog* net_log);
virtual ~SOCKSConnectJob();
// ConnectJob methods.
virtual LoadState GetLoadState() const OVERRIDE;
private:
enum State {
STATE_TRANSPORT_CONNECT,
STATE_TRANSPORT_CONNECT_COMPLETE,
STATE_SOCKS_CONNECT,
STATE_SOCKS_CONNECT_COMPLETE,
STATE_NONE,
};
void OnIOComplete(int result);
// Runs the state transition loop.
int DoLoop(int result);
int DoTransportConnect();
int DoTransportConnectComplete(int result);
int DoSOCKSConnect();
int DoSOCKSConnectComplete(int result);
// Begins the transport connection and the SOCKS handshake. 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() OVERRIDE;
scoped_refptr<SOCKSSocketParams> socks_params_;
TransportClientSocketPool* const transport_pool_;
HostResolver* const resolver_;
State next_state_;
CompletionCallback callback_;
scoped_ptr<ClientSocketHandle> transport_socket_handle_;
scoped_ptr<StreamSocket> socket_;
DISALLOW_COPY_AND_ASSIGN(SOCKSConnectJob);
};
class NET_EXPORT_PRIVATE SOCKSClientSocketPool
: public ClientSocketPool, public HigherLayeredPool {
public:
typedef SOCKSSocketParams SocketParams;
SOCKSClientSocketPool(
int max_sockets,
int max_sockets_per_group,
ClientSocketPoolHistograms* histograms,
HostResolver* host_resolver,
TransportClientSocketPool* transport_pool,
NetLog* net_log);
virtual ~SOCKSClientSocketPool();
// ClientSocketPool implementation.
virtual int RequestSocket(const std::string& group_name,
const void* connect_params,
RequestPriority priority,
ClientSocketHandle* handle,
const CompletionCallback& callback,
const BoundNetLog& net_log) OVERRIDE;
virtual void RequestSockets(const std::string& group_name,
const void* params,
int num_sockets,
const BoundNetLog& net_log) OVERRIDE;
virtual void CancelRequest(const std::string& group_name,
ClientSocketHandle* handle) OVERRIDE;
virtual void ReleaseSocket(const std::string& group_name,
scoped_ptr<StreamSocket> socket,
int id) OVERRIDE;
virtual void FlushWithError(int error) OVERRIDE;
virtual void CloseIdleSockets() OVERRIDE;
virtual int IdleSocketCount() const OVERRIDE;
virtual int IdleSocketCountInGroup(
const std::string& group_name) const OVERRIDE;
virtual LoadState GetLoadState(
const std::string& group_name,
const ClientSocketHandle* handle) const OVERRIDE;
virtual base::DictionaryValue* GetInfoAsValue(
const std::string& name,
const std::string& type,
bool include_nested_pools) const OVERRIDE;
virtual base::TimeDelta ConnectionTimeout() const OVERRIDE;
virtual ClientSocketPoolHistograms* histograms() const OVERRIDE;
// LowerLayeredPool implementation.
virtual bool IsStalled() const OVERRIDE;
virtual void AddHigherLayeredPool(HigherLayeredPool* higher_pool) OVERRIDE;
virtual void RemoveHigherLayeredPool(HigherLayeredPool* higher_pool) OVERRIDE;
// HigherLayeredPool implementation.
virtual bool CloseOneIdleConnection() OVERRIDE;
private:
typedef ClientSocketPoolBase<SOCKSSocketParams> PoolBase;
class SOCKSConnectJobFactory : public PoolBase::ConnectJobFactory {
public:
SOCKSConnectJobFactory(TransportClientSocketPool* transport_pool,
HostResolver* host_resolver,
NetLog* net_log)
: transport_pool_(transport_pool),
host_resolver_(host_resolver),
net_log_(net_log) {}
virtual ~SOCKSConnectJobFactory() {}
// ClientSocketPoolBase::ConnectJobFactory methods.
virtual scoped_ptr<ConnectJob> NewConnectJob(
const std::string& group_name,
const PoolBase::Request& request,
ConnectJob::Delegate* delegate) const OVERRIDE;
virtual base::TimeDelta ConnectionTimeout() const OVERRIDE;
private:
TransportClientSocketPool* const transport_pool_;
HostResolver* const host_resolver_;
NetLog* net_log_;
DISALLOW_COPY_AND_ASSIGN(SOCKSConnectJobFactory);
};
TransportClientSocketPool* const transport_pool_;
PoolBase base_;
DISALLOW_COPY_AND_ASSIGN(SOCKSClientSocketPool);
};
} // namespace net
#endif // NET_SOCKET_SOCKS_CLIENT_SOCKET_POOL_H_
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