Revert 69690 - Add support for sockets that can listen and accept a connection.

These sockets allow one connection at a time, however clients can
connect and disconnect repeatedly.

These are going to be used by Cloud Print, Remoting and
Automation.

BUG=NONE
TEST=BUILD

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=69660

Review URL: http://codereview.chromium.org/5749001

TBR=dmaclach@chromium.org
Review URL: http://codereview.chromium.org/5972002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@69691 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 14 insertions, 23 deletions

diff --git a/ipc/ipc_channel_posix.h b/ipc/ipc_channel_posix.h
index ecfd41a..4ff3de1 100644
--- a/ipc/ipc_channel_posix.h
+++ b/ipc/ipc_channel_posix.h
@@ -40,10 +40,12 @@
 
 namespace IPC {
 
+// An implementation of ChannelImpl for POSIX systems that works via
+// socketpairs.  See the .cc file for an overview of the implementation.
 class Channel::ChannelImpl : public MessageLoopForIO::Watcher {
  public:
   // Mirror methods of Channel, see ipc_channel.h for description.
-  ChannelImpl(const IPC::ChannelHandle& channel_handle, Mode mode,
+  ChannelImpl(const IPC::ChannelHandle &channel_handle, Mode mode,
               Listener* listener);
   ~ChannelImpl();
   bool Connect();
@@ -51,23 +53,13 @@ class Channel::ChannelImpl : public MessageLoopForIO::Watcher {
   void set_listener(Listener* listener) { listener_ = listener; }
   bool Send(Message* message);
   int GetClientFileDescriptor() const;
-  bool AcceptsConnections() const;
-  bool HasAcceptedConnection() const;
-  void ResetToAcceptingConnectionState();
 
  private:
-  bool CreatePipe(const IPC::ChannelHandle& channel_handle,
-                  bool uses_domain_sockets,
-                  bool listening_socket);
+  bool CreatePipe(const IPC::ChannelHandle &channel_handle, Mode mode);
 
   bool ProcessIncomingMessages();
   bool ProcessOutgoingMessages();
 
-  bool AcceptConnection();
-  void ClosePipeOnError();
-  void QueueHelloMessage();
-  bool IsHelloMessage(const Message* m) const;
-
   // MessageLoopForIO::Watcher implementation.
   virtual void OnFileCanReadWithoutBlocking(int fd);
   virtual void OnFileCanWriteWithoutBlocking(int fd);
@@ -82,14 +74,17 @@ class Channel::ChannelImpl : public MessageLoopForIO::Watcher {
 
   // Indicates whether we're currently blocked waiting for a write to complete.
   bool is_blocked_on_write_;
-  bool waiting_connect_;
 
   // If sending a message blocks then we use this variable
   // to keep track of where we are.
   size_t message_send_bytes_written_;
 
-  // File descriptor we're listening on for new connections if we listen
-  // for connections.
+  // If the kTestingChannelID flag is specified, we use a FIFO instead of
+  // a socketpair().
+  bool uses_fifo_;
+
+  // File descriptor we're listening on for new connections in the FIFO case;
+  // unused otherwise.
   int server_listen_pipe_;
 
   // The pipe used for communication.
@@ -137,20 +132,16 @@ class Channel::ChannelImpl : public MessageLoopForIO::Watcher {
   std::string input_overflow_buf_;
   std::vector<int> input_overflow_fds_;
 
-  // True if we are responsible for unlinking the unix domain socket file.
-  bool must_unlink_;
+  // In server-mode, we have to wait for the client to connect before we
+  // can begin reading.  We make use of the input_state_ when performing
+  // the connect operation in overlapped mode.
+  bool waiting_connect_;
 
   ScopedRunnableMethodFactory<ChannelImpl> factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChannelImpl);
 };
 
-// The maximum length of the name of a pipe for MODE_NAMED_SERVER or
-// MODE_NAMED_CLIENT if you want to pass in your own socket.
-// The standard size on linux is 108, mac is 104. To maintain consistency
-// across platforms we standardize on the smaller value.
-static const size_t kMaxPipeNameLength = 104;
-
 }  // namespace IPC
 
 #endif  // IPC_IPC_CHANNEL_POSIX_H_