Update comments of the Pepper networking APIs.

ppapi/c/dev/ppb_tcp_socket_dev.h

 /* Copyright 2013 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.
  */
 
-/* From dev/ppb_tcp_socket_dev.idl modified Wed Jun 12 11:16:37 2013. */
+/* From dev/ppb_tcp_socket_dev.idl modified Thu Jun 20 12:21:11 2013. */
 
 #ifndef PPAPI_C_DEV_PPB_TCP_SOCKET_DEV_H_
 #define PPAPI_C_DEV_PPB_TCP_SOCKET_DEV_H_
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_macros.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_stdint.h"
 #include "ppapi/c/pp_var.h"
 
 #define PPB_TCPSOCKET_DEV_INTERFACE_0_1 "PPB_TCPSocket(Dev);0.1"
 #define PPB_TCPSOCKET_DEV_INTERFACE PPB_TCPSOCKET_DEV_INTERFACE_0_1
 
 /**
  * @file
  * This file defines the <code>PPB_TCPSocket_Dev</code> interface.
  */
 
 
 /**
  * @addtogroup Enums
  * @{
  */
+/**
+ * Option names used by <code>SetOption()</code>.
+ */
 typedef enum {
-  /* Disables coalescing of small writes to make TCP segments, and instead
-   * deliver data immediately. Value type is PP_VARTYPE_BOOL. */
+  /**
+   * Disables coalescing of small writes to make TCP segments, and instead
+   * delivers data immediately. Value's type is <code>PP_VARTYPE_BOOL</code>.
+   * This option can only be set after a successful <code>Connect()</code> call.
+   */
   PP_TCPSOCKET_OPTION_NO_DELAY = 0,
-  /* Specifies the socket send buffer in bytes. Value's type should be
-   * PP_VARTYPE_INT32.
+  /**
+   * Specifies the total per-socket buffer space reserved for sends. Value's
+   * type should be <code>PP_VARTYPE_INT32</code>.
+   * This option can only be set after a successful <code>Connect()</code> call.
+   *
    * Note: This is only treated as a hint for the browser to set the buffer
-   * size. Even if SetOption() reports that this option has been successfully
-   * set, the browser doesn't guarantee to conform to it. */
+   * size. Even if <code>SetOption()</code> succeeds, the browser doesn't
+   * guarantee it will conform to the size.
+   */
   PP_TCPSOCKET_OPTION_SEND_BUFFER_SIZE = 1,
-  /* Specifies the socket receive buffer in bytes. Value's type should be
-   * PP_VARTYPE_INT32.
+  /**
+   * Specifies the total per-socket buffer space reserved for receives. Value's
+   * type should be <code>PP_VARTYPE_INT32</code>.
+   * This option can only be set after a successful <code>Connect()</code> call.
+   *
    * Note: This is only treated as a hint for the browser to set the buffer
-   * size. Even if SetOption() reports that this option has been successfully
-   * set, the browser doesn't guarantee to conform to it. */
+   * size. Even if <code>SetOption()</code> succeeds, the browser doesn't
+   * guarantee it will conform to the size.
+   */
   PP_TCPSOCKET_OPTION_RECV_BUFFER_SIZE = 2
 } PP_TCPSocket_Option_Dev;
 PP_COMPILE_ASSERT_SIZE_IN_BYTES(PP_TCPSocket_Option_Dev, 4);
 /**
  * @}
  */
 
 /**
  * @addtogroup Interfaces
  * @{
  */
 /**
  * The <code>PPB_TCPSocket_Dev</code> interface provides TCP socket operations.
+ *
+ * Permissions: Apps permission <code>socket</code> with subrule
+ * <code>tcp-connect</code> is required for <code>Connect()</code>.
+ * For more details about network communication permissions, please see:
+ * http://developer.chrome.com/apps/app_network.html
  */
 struct PPB_TCPSocket_Dev_0_1 {
   /**
-   * Allocates a TCP socket resource.
+   * Creates a TCP socket resource.
+   *
+   * @param[in] instance A <code>PP_Instance</code> identifying one instance of
+   * a module.
+   *
+   * @return A <code>PP_Resource</code> corresponding to a TCP socket or 0
+   * on failure.
    */
   PP_Resource (*Create)(PP_Instance instance);
   /**
-   * Determines if a given resource is TCP socket.
+   * Determines if a given resource is a TCP socket.
+   *
+   * @param[in] resource A <code>PP_Resource</code> to check.
+   *
+   * @return <code>PP_TRUE</code> if the input is a
+   * <code>PPB_TCPSocket_Dev</code> resource; <code>PP_FALSE</code>
+   * otherwise.
    */
   PP_Bool (*IsTCPSocket)(PP_Resource resource);
   /**
-   * Connects to an address given by |addr|, which is a PPB_NetAddress_Dev
-   * resource.
+   * Connects to the given address.
+   *
+   * @param[in] tcp_socket A <code>PP_Resource</code> corresponding to a TCP
+   * socket.
+   * @param[in] addr A <code>PPB_NetAddress_Dev</code> resource.
+   * @param[in] callback A <code>PP_CompletionCallback</code> to be called upon
+   * completion.
+   *
+   * @return An int32_t containing an error code from <code>pp_errors.h</code>,
+   * including (but not limited to):
+   * - <code>PP_ERROR_NOACCESS</code>: the caller doesn't have required
+   *   permissions.
+   * - <code>PP_ERROR_ADDRESS_UNREACHABLE</code>: <code>addr</code> is
+   *   unreachable.
+   * - <code>PP_ERROR_CONNECTION_REFUSED</code>: the connection attempt was
+   *   refused.
+   * - <code>PP_ERROR_CONNECTION_FAILED</code>: the connection attempt failed.
+   * - <code>PP_ERROR_CONNECTION_TIMEDOUT</code>: the connection attempt timed
+   *   out.
    */
   int32_t (*Connect)(PP_Resource tcp_socket,
                      PP_Resource addr,
                      struct PP_CompletionCallback callback);
   /**
-   * Gets the local address of the socket, if it has been connected.
-   * Returns a PPB_NetAddress_Dev resource on success; returns 0 on failure.
+   * Gets the local address of the socket, if it is connected.
+   *
+   * @param[in] tcp_socket A <code>PP_Resource</code> corresponding to a TCP
+   * socket.
+   *
+   * @return A <code>PPB_NetAddress_Dev</code> resource on success or 0 on
+   * failure.
    */
   PP_Resource (*GetLocalAddress)(PP_Resource tcp_socket);
   /**
-   * Gets the remote address of the socket, if it has been connected.
-   * Returns a PPB_NetAddress_Dev resource on success; returns 0 on failure.
+   * Gets the remote address of the socket, if it is connected.
+   *
+   * @param[in] tcp_socket A <code>PP_Resource</code> corresponding to a TCP
+   * socket.
+   *
+   * @return A <code>PPB_NetAddress_Dev</code> resource on success or 0 on
+   * failure.
    */
   PP_Resource (*GetRemoteAddress)(PP_Resource tcp_socket);
   /**
-   * Reads data from the socket. The size of |buffer| must be at least as large
-   * as |bytes_to_read|. May perform a partial read. Returns the number of bytes
-   * read or an error code. If the return value is 0, then it indicates that
-   * end-of-file was reached.
+   * Reads data from the socket. The socket must be connected. It may perform a
+   * partial read.
    *
-   * Multiple outstanding read requests are not supported.
+   * @param[in] tcp_socket A <code>PP_Resource</code> corresponding to a TCP
+   * socket.
+   * @param[out] buffer The buffer to store the received data on success. It
+   * must be at least as large as <code>bytes_to_read</code>.
+   * @param[in] bytes_to_read The number of bytes to read.
+   * @param[in] callback A <code>PP_CompletionCallback</code> to be called upon
+   * completion.
+   *
+   * @return A non-negative number on success to indicate how many bytes have
+   * been read, 0 means that end-of-file was reached; otherwise, an error code
+   * from <code>pp_errors.h</code>.
    */
   int32_t (*Read)(PP_Resource tcp_socket,
                   char* buffer,
                   int32_t bytes_to_read,
                   struct PP_CompletionCallback callback);
   /**
-   * Writes data to the socket. May perform a partial write. Returns the number
-   * of bytes written or an error code.
+   * Writes data to the socket. The socket must be connected. It may perform a
+   * partial write.
    *
-   * Multiple outstanding write requests are not supported.
+   * @param[in] tcp_socket A <code>PP_Resource</code> corresponding to a TCP
+   * socket.
+   * @param[in] buffer The buffer containing the data to write.
+   * @param[in] bytes_to_write The number of bytes to write.
+   * @param[in] callback A <code>PP_CompletionCallback</code> to be called upon
+   * completion.
+   *
+   * @return A non-negative number on success to indicate how many bytes have
+   * been written; otherwise, an error code from <code>pp_errors.h</code>.
    */
   int32_t (*Write)(PP_Resource tcp_socket,
                    const char* buffer,
                    int32_t bytes_to_write,
                    struct PP_CompletionCallback callback);
   /**
-   * Cancels any IO that may be pending, and disconnects the socket. Any pending
-   * callbacks will still run, reporting PP_ERROR_ABORTED if pending IO was
-   * interrupted. It is NOT valid to call Connect() again after a call to this
-   * method. Note: If the socket is destroyed when it is still connected, then
-   * it will be implicitly disconnected, so you are not required to call this
-   * method.
+   * Cancels all pending reads and writes and disconnects the socket. Any
+   * pending callbacks will still run, reporting <code>PP_ERROR_ABORTED</code>
+   * if pending IO was interrupted. After a call to this method, no output
+   * buffer pointers passed into previous <code>Read()</code> calls will be
+   * accessed. It is not valid to call <code>Connect()</code> again.
+   *
+   * The socket is implicitly closed if it is destroyed, so you are not required
+   * to call this method.
+   *
+   * @param[in] tcp_socket A <code>PP_Resource</code> corresponding to a TCP
+   * socket.
    */
   void (*Close)(PP_Resource tcp_socket);
   /**
-   * Sets an option on |tcp_socket|.  Supported |name| and |value| parameters
-   * are as described for PP_TCPSocketOption_Dev.  |callback| will be
-   * invoked with PP_OK if setting the option succeeds, or an error code
-   * otherwise. The socket must be connected before SetOption is called.
+   * Sets a socket option on the TCP socket.
+   * Please see the <code>PP_TCPSocket_Option_Dev</code> description for option
+   * names, value types and allowed values.
+   *
+   * @param[in] tcp_socket A <code>PP_Resource</code> corresponding to a TCP
+   * socket.
+   * @param[in] name The option type to set.
+   * @param[in] value The option value to set.
+   * @param[in] callback A <code>PP_CompletionCallback</code> to be called upon
+   * completion.
+   *
+   * @return An int32_t containing an error code from <code>pp_errors.h</code>.
    */
   int32_t (*SetOption)(PP_Resource tcp_socket,
                        PP_TCPSocket_Option_Dev name,
                        struct PP_Var value,
                        struct PP_CompletionCallback callback);
 };
 
 typedef struct PPB_TCPSocket_Dev_0_1 PPB_TCPSocket_Dev;
 /**
  * @}
  */
 
 #endif  /* PPAPI_C_DEV_PPB_TCP_SOCKET_DEV_H_ */