/* 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.
 */

/**
 * This file defines the <code>PPB_TCPSocket_Private</code> interface.
 */

label Chrome {
  M17 = 0.3,
  M20 = 0.4,
  M27 = 0.5
};

[assert_size(4)]
enum PP_TCPSocketOption_Private {
  // Special value used for testing. Guaranteed to fail SetOption().
  PP_TCPSOCKETOPTION_PRIVATE_INVALID = 0,

  // Disable coalescing of small writes to make TCP segments, and instead
  // deliver data immediately. For SSL sockets, this option must be set before
  // SSLHandshake() is called. Value type is PP_VARTYPE_BOOL.
  PP_TCPSOCKETOPTION_PRIVATE_NO_DELAY = 1
};

/**
 * The <code>PPB_TCPSocket_Private</code> interface provides TCP socket
 * operations.
 */
interface PPB_TCPSocket_Private {
  /**
   * Allocates a TCP socket resource.
   */
  PP_Resource Create([in] PP_Instance instance);

  /**
   * Determines if a given resource is TCP socket.
   */
  PP_Bool IsTCPSocket([in] PP_Resource resource);

  /**
   * Connects to a TCP port given as a host-port pair.
   * When a proxy server is used, |host| and |port| refer to the proxy server
   * instead of the destination server.
   */
  int32_t Connect([in] PP_Resource tcp_socket,
                  [in] str_t host,
                  [in] uint16_t port,
                  [in] PP_CompletionCallback callback);

  /**
   * Same as Connect(), but connecting to the address given by |addr|. A typical
   * use-case would be for reconnections.
   */
  int32_t ConnectWithNetAddress([in] PP_Resource tcp_socket,
                                [in] PP_NetAddress_Private addr,
                                [in] PP_CompletionCallback callback);

  /**
   * Gets the local address of the socket, if it has been connected.
   * Returns PP_TRUE on success.
   */
  PP_Bool GetLocalAddress([in] PP_Resource tcp_socket,
                          [out] PP_NetAddress_Private local_addr);

  /**
   * Gets the remote address of the socket, if it has been connected.
   * Returns PP_TRUE on success.
   */
  PP_Bool GetRemoteAddress([in] PP_Resource tcp_socket,
                           [out] PP_NetAddress_Private remote_addr);

  /**
   * Does SSL handshake and moves to sending and receiving encrypted data. The
   * socket must have been successfully connected. |server_name| will be
   * compared with the name(s) in the server's certificate during the SSL
   * handshake. |server_port| is only used to identify an SSL server in the SSL
   * session cache.
   * When a proxy server is used, |server_name| and |server_port| refer to the
   * destination server.
   * If the socket is not connected, or there are pending read/write requests,
   * SSLHandshake() will fail without starting a handshake. Otherwise, any
   * failure during the handshake process will cause the socket to be
   * disconnected.
   */
  int32_t SSLHandshake([in] PP_Resource tcp_socket,
                       [in] str_t server_name,
                       [in] uint16_t server_port,
                       [in] PP_CompletionCallback callback);

  /**
   * Returns the server's <code>PPB_X509Certificate_Private</code> for a socket
   * connection if an SSL connection has been established using
   * <code>SSLHandshake</code>. If no SSL connection has been established, a
   * null resource is returned.
   */
  [version=0.4]
  PP_Resource GetServerCertificate([in] PP_Resource tcp_socket);

  /**
   * NOTE: This function is not implemented and will return
   * <code>PP_FALSE</code>.
   * Adds a trusted/untrusted chain building certificate to be used for this
   * connection. The <code>certificate</code> must be a
   * <code>PPB_X509Certificate_Private<code>. <code>PP_TRUE</code> is returned
   * upon success.
   */
  [version=0.4]
  PP_Bool AddChainBuildingCertificate([in] PP_Resource tcp_socket,
                                      [in] PP_Resource certificate,
                                      [in] PP_Bool is_trusted);

  /**
   * 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.
   * This method won't return more than 1 megabyte, so if |bytes_to_read|
   * exceeds 1 megabyte, it will always perform a partial read.
   * Multiple outstanding read requests are not supported.
   */
  int32_t Read([in] PP_Resource tcp_socket,
               [out] str_t buffer,
               [in] int32_t bytes_to_read,
               [in] PP_CompletionCallback callback);

  /**
   * Writes data to the socket. May perform a partial write. Returns the number
   * of bytes written or an error code.
   * This method won't write more than 1 megabyte, so if |bytes_to_write|
   * exceeds 1 megabyte, it will always perform a partial write.
   * Multiple outstanding write requests are not supported.
   */
  int32_t Write([in] PP_Resource tcp_socket,
                [in] str_t buffer,
                [in] int32_t bytes_to_write,
                [in] 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.
   */
  void Disconnect([in] PP_Resource tcp_socket);

  /**
   * Sets an option on |tcp_socket|.  Supported |name| and |value| parameters
   * are as described for PP_TCPSocketOption_Private.  |callback| will be
   * invoked with PP_OK if setting the option succeeds, or an error code
   * otherwise. The socket must be connection before SetOption is called.
   */
  [version=0.5]
  int32_t SetOption([in] PP_Resource tcp_socket,
                    [in] PP_TCPSocketOption_Private name,
                    [in] PP_Var value,
                    [in] PP_CompletionCallback callback);

};