Implement full duplex mode for windows tcp sockets.

Move tcp_client_socket.h stuff to tcp_client_socket_libevent.h and
tcp_client_socket_win.h.
Add tests.
Review URL: http://codereview.chromium.org/75030


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@13983 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 114 insertions, 0 deletions

diff --git a/net/base/tcp_client_socket_win.h b/net/base/tcp_client_socket_win.h
new file mode 100644
index 0000000..63f2b93
--- /dev/null
+++ b/net/base/tcp_client_socket_win.h
@@ -0,0 +1,114 @@
+// Copyright (c) 2006-2009 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_BASE_TCP_CLIENT_SOCKET_WIN_H_
+#define NET_BASE_TCP_CLIENT_SOCKET_WIN_H_
+
+#include <ws2tcpip.h>
+
+#include "base/object_watcher.h"
+#include "net/base/address_list.h"
+#include "net/base/client_socket.h"
+#include "net/base/completion_callback.h"
+
+namespace net {
+
+class TCPClientSocketWin : public ClientSocket {
+ public:
+  // The IP address(es) and port number to connect to.  The TCP socket will try
+  // each IP address in the list until it succeeds in establishing a
+  // connection.
+  explicit TCPClientSocketWin(const AddressList& addresses);
+
+  ~TCPClientSocketWin();
+
+  // ClientSocket methods:
+  virtual int Connect(CompletionCallback* callback);
+  virtual void Disconnect();
+  virtual bool IsConnected() const;
+  virtual bool IsConnectedAndIdle() const;
+
+  // Socket methods:
+  // Multiple outstanding requests are not supported.
+  // Full duplex mode (reading and writing at the same time) is supported
+  virtual int Read(char* buf, int buf_len, CompletionCallback* callback);
+  virtual int Write(const char* buf, int buf_len, CompletionCallback* callback);
+
+ private:
+  class ReadDelegate : public base::ObjectWatcher::Delegate {
+   public:
+    explicit ReadDelegate(TCPClientSocketWin* tcp_socket)
+        : tcp_socket_(tcp_socket) { }
+    virtual ~ReadDelegate() { }
+
+    // base::ObjectWatcher::Delegate methods:
+    virtual void OnObjectSignaled(HANDLE object);
+
+   private:
+    TCPClientSocketWin* const tcp_socket_;
+  };
+
+  class WriteDelegate : public base::ObjectWatcher::Delegate {
+   public:
+    explicit WriteDelegate(TCPClientSocketWin* tcp_socket)
+        : tcp_socket_(tcp_socket) { }
+    virtual ~WriteDelegate() { }
+
+    // base::ObjectWatcher::Delegate methods:
+    virtual void OnObjectSignaled(HANDLE object);
+
+   private:
+    TCPClientSocketWin* const tcp_socket_;
+  };
+
+  int CreateSocket(const struct addrinfo* ai);
+  void DoReadCallback(int rv);
+  void DoWriteCallback(int rv);
+  void DidCompleteConnect();
+
+  SOCKET socket_;
+
+  // The list of addresses we should try in order to establish a connection.
+  AddressList addresses_;
+
+  // Where we are in above list, or NULL if all addrinfos have been tried.
+  const struct addrinfo* current_ai_;
+
+  // The various states that the socket could be in.
+  bool waiting_connect_;
+  bool waiting_read_;
+  bool waiting_write_;
+
+  // The separate OVERLAPPED variables for asynchronous operation.
+  // |read_overlapped_| is used for both Connect() and Read().
+  // |write_overlapped_| is only used for Write();
+  OVERLAPPED read_overlapped_;
+  OVERLAPPED write_overlapped_;
+
+  // The buffers used in Read() and Write().
+  WSABUF read_buffer_;
+  WSABUF write_buffer_;
+
+  // |reader_| handles the signals from |read_watcher_|.
+  ReadDelegate reader_;
+  // |writer_| handles the signals from |write_watcher_|.
+  WriteDelegate writer_;
+
+  // |read_watcher_| watches for events from Connect() and Read().
+  base::ObjectWatcher read_watcher_;
+  // |write_watcher_| watches for events from Write();
+  base::ObjectWatcher write_watcher_;
+
+  // External callback; called when connect or read is complete.
+  CompletionCallback* read_callback_;
+
+  // External callback; called when write is complete.
+  CompletionCallback* write_callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(TCPClientSocketWin);
+};
+
+}  // namespace net
+
+#endif  // NET_BASE_TCP_CLIENT_SOCKET_WIN_H_