net/socket/socks_client_socket.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef NET_SOCKET_SOCKS_CLIENT_SOCKET_H_
   6 #define NET_SOCKET_SOCKS_CLIENT_SOCKET_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/gtest_prod_util.h"
  12 #include "base/memory/ref_counted.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "net/base/address_list.h"
  15 #include "net/base/completion_callback.h"
  16 #include "net/base/net_errors.h"
  17 #include "net/base/net_log.h"
  18 #include "net/dns/host_resolver.h"
  19 #include "net/dns/single_request_host_resolver.h"
  20 #include "net/socket/stream_socket.h"
  21
  22 namespace net {
  23
  24 class ClientSocketHandle;
  25 class BoundNetLog;
  26
  27 // The SOCKS client socket implementation
  28 class NET_EXPORT_PRIVATE SOCKSClientSocket : public StreamSocket {
  29  public:
  30   // |req_info| contains the hostname and port to which the socket above will
  31   // communicate to via the socks layer. For testing the referrer is optional.
  32   SOCKSClientSocket(scoped_ptr<ClientSocketHandle> transport_socket,
  33                     const HostResolver::RequestInfo& req_info,
  34                     RequestPriority priority,
  35                     HostResolver* host_resolver);
  36
  37   // On destruction Disconnect() is called.
  38   virtual ~SOCKSClientSocket();
  39
  40   // StreamSocket implementation.
  41
  42   // Does the SOCKS handshake and completes the protocol.
  43   virtual int Connect(const CompletionCallback& callback) OVERRIDE;
  44   virtual void Disconnect() OVERRIDE;
  45   virtual bool IsConnected() const OVERRIDE;
  46   virtual bool IsConnectedAndIdle() const OVERRIDE;
  47   virtual const BoundNetLog& NetLog() const OVERRIDE;
  48   virtual void SetSubresourceSpeculation() OVERRIDE;
  49   virtual void SetOmniboxSpeculation() OVERRIDE;
  50   virtual bool WasEverUsed() const OVERRIDE;
  51   virtual bool UsingTCPFastOpen() const OVERRIDE;
  52   virtual bool WasNpnNegotiated() const OVERRIDE;
  53   virtual NextProto GetNegotiatedProtocol() const OVERRIDE;
  54   virtual bool GetSSLInfo(SSLInfo* ssl_info) OVERRIDE;
  55
  56   // Socket implementation.
  57   virtual int Read(IOBuffer* buf,
  58                    int buf_len,
  59                    const CompletionCallback& callback) OVERRIDE;
  60   virtual int Write(IOBuffer* buf,
  61                     int buf_len,
  62                     const CompletionCallback& callback) OVERRIDE;
  63
  64   virtual bool SetReceiveBufferSize(int32 size) OVERRIDE;
  65   virtual bool SetSendBufferSize(int32 size) OVERRIDE;
  66
  67   virtual int GetPeerAddress(IPEndPoint* address) const OVERRIDE;
  68   virtual int GetLocalAddress(IPEndPoint* address) const OVERRIDE;
  69
  70  private:
  71   FRIEND_TEST_ALL_PREFIXES(SOCKSClientSocketTest, CompleteHandshake);
  72   FRIEND_TEST_ALL_PREFIXES(SOCKSClientSocketTest, SOCKS4AFailedDNS);
  73   FRIEND_TEST_ALL_PREFIXES(SOCKSClientSocketTest, SOCKS4AIfDomainInIPv6);
  74
  75   enum State {
  76     STATE_RESOLVE_HOST,
  77     STATE_RESOLVE_HOST_COMPLETE,
  78     STATE_HANDSHAKE_WRITE,
  79     STATE_HANDSHAKE_WRITE_COMPLETE,
  80     STATE_HANDSHAKE_READ,
  81     STATE_HANDSHAKE_READ_COMPLETE,
  82     STATE_NONE,
  83   };
  84
  85   void DoCallback(int result);
  86   void OnIOComplete(int result);
  87
  88   int DoLoop(int last_io_result);
  89   int DoResolveHost();
  90   int DoResolveHostComplete(int result);
  91   int DoHandshakeRead();
  92   int DoHandshakeReadComplete(int result);
  93   int DoHandshakeWrite();
  94   int DoHandshakeWriteComplete(int result);
  95
  96   const std::string BuildHandshakeWriteBuffer() const;
  97
  98   // Stores the underlying socket.
  99   scoped_ptr<ClientSocketHandle> transport_;
 100
 101   State next_state_;
 102
 103   // Stores the callback to the layer above, called on completing Connect().
 104   CompletionCallback user_callback_;
 105
 106   // This IOBuffer is used by the class to read and write
 107   // SOCKS handshake data. The length contains the expected size to
 108   // read or write.
 109   scoped_refptr<IOBuffer> handshake_buf_;
 110
 111   // While writing, this buffer stores the complete write handshake data.
 112   // While reading, it stores the handshake information received so far.
 113   std::string buffer_;
 114
 115   // This becomes true when the SOCKS handshake has completed and the
 116   // overlying connection is free to communicate.
 117   bool completed_handshake_;
 118
 119   // These contain the bytes sent / received by the SOCKS handshake.
 120   size_t bytes_sent_;
 121   size_t bytes_received_;
 122
 123   // Used to resolve the hostname to which the SOCKS proxy will connect.
 124   SingleRequestHostResolver host_resolver_;
 125   AddressList addresses_;
 126   HostResolver::RequestInfo host_request_info_;
 127   RequestPriority priority_;
 128
 129   BoundNetLog net_log_;
 130
 131   DISALLOW_COPY_AND_ASSIGN(SOCKSClientSocket);
 132 };
 133
 134 }  // namespace net
 135
 136 #endif  // NET_SOCKET_SOCKS_CLIENT_SOCKET_H_