/* Copyright (c) 2011 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 PPAPI_C_PPB_TRANSPORT_DEV_H_
#define PPAPI_C_PPB_TRANSPORT_DEV_H_

#include "ppapi/c/pp_bool.h"
#include "ppapi/c/pp_completion_callback.h"
#include "ppapi/c/pp_module.h"
#include "ppapi/c/pp_instance.h"
#include "ppapi/c/pp_resource.h"
#include "ppapi/c/pp_stdint.h"
#include "ppapi/c/pp_var.h"

#define PPB_TRANSPORT_DEV_INTERFACE_0_6 "PPB_Transport;0.6"
#define PPB_TRANSPORT_DEV_INTERFACE PPB_TRANSPORT_DEV_INTERFACE_0_6

typedef enum {
  // STUN server address and port, e.g "stun.example.com:19302".
  PP_TRANSPORTPROPERTY_STUN_SERVER = 0,

  // Relay server name, e.g. "relay.example.com".
  PP_TRANSPORTPROPERTY_RELAY_SERVER = 1,

  // Single string that specifies token for use with relay server.
  PP_TRANSPORTPROPERTY_RELAY_TOKEN = 2,

  // TCP receive window in bytes. Takes effect only for PseudoTCP
  // connections.
  PP_TRANSPORTPROPERTY_TCP_RECEIVE_WINDOW = 3,

  // TCP send window in bytes. Takes effect only for PseudoTCP
  // connections.
  PP_TRANSPORTPROPERTY_TCP_SEND_WINDOW = 4,

  // Boolean value that disables Neagle's algorithm when set to
  // true. When Neagle's algorithm is disabled, all outgoing packets
  // are sent as soon as possible. When set to false (by default) data
  // may be buffered until there is a sufficient amount to send.
  PP_TRANSPORTPROPERTY_TCP_NO_DELAY = 5,

  // Delay for ACK packets in milliseconds. By default set to 100ms.
  PP_TRANSPORTPROPERTY_TCP_ACK_DELAY = 6
} PP_TransportProperty;
PP_COMPILE_ASSERT_SIZE_IN_BYTES(PP_TransportProperty, 4);

struct PPB_Transport_Dev {
  // Creates a new transport object with the specified name using the
  // specified protocol.
  PP_Resource (*CreateTransport)(PP_Instance instance,
                                 const char* name,
                                 const char* proto);

  // Returns PP_TRUE if resource is a Transport, PP_FALSE otherwise.
  PP_Bool (*IsTransport)(PP_Resource resource);

  // Returns PP_TRUE if the transport is currently writable (i.e. can
  // send data to the remote peer), PP_FALSE otherwise.
  PP_Bool (*IsWritable)(PP_Resource transport);
  // TODO(juberti): other getters/setters
  // connect state
  // connect type, protocol
  // RTT

  // Sets various configuration properties of the transport.
  int32_t (*SetProperty)(PP_Resource transport,
                         PP_TransportProperty property,
                         struct PP_Var value);

  // Establishes a connection to the remote peer.  Returns
  // PP_OK_COMPLETIONPENDING and notifies on |cb| when connectivity is
  // established (or timeout occurs).
  int32_t (*Connect)(PP_Resource transport,
                     struct PP_CompletionCallback cb);

  // Obtains another ICE candidate address to be provided to the
  // remote peer. Returns PP_OK_COMPLETIONPENDING if there are no more
  // addresses to be sent. After the callback is called
  // GetNextAddress() must be called again to get the address.
  int32_t (*GetNextAddress)(PP_Resource transport,
                            struct PP_Var* address,
                            struct PP_CompletionCallback cb);
  // Provides an ICE candidate address that was received
  // from the remote peer.
  int32_t (*ReceiveRemoteAddress)(PP_Resource transport,
                                  struct PP_Var address);

  // Like recv(), receives data. Returns PP_OK_COMPLETIONPENDING if there
  // is currently no data to receive. In that case, the |data| pointer
  // should remain valid until the callback is called.
  int32_t (*Recv)(PP_Resource transport,
                  void* data,
                  uint32_t len,
                  struct PP_CompletionCallback cb);
  // Like send(), sends data. Returns PP_OK_COMPLETIONPENDING if the
  // socket is currently flow-controlled. In that case, the |data|
  // pointer should remain valid until the callback is called.
  int32_t (*Send)(PP_Resource transport,
                  const void* data,
                  uint32_t len,
                  struct PP_CompletionCallback cb);

  // Disconnects from the remote peer.
  int32_t (*Close)(PP_Resource transport);
};

#endif  /* PPAPI_C_PPB_TRANSPORT_DEV_H_ */