The Tor Browser: netwerk/sctp/datachannel/DataChannelProtocol.h@ca08bd8f51b2

     1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* vim: set ts=2 et sw=2 tw=80: */

     3 /* This Source Code Form is subject to the terms of the Mozilla Public

     4  * License, v. 2.0. If a copy of the MPL was not distributed with this file,

     5  * You can obtain one at http://mozilla.org/MPL/2.0/. */

     7 #ifndef NETWERK_SCTP_DATACHANNEL_DATACHANNELPROTOCOL_H_

     8 #define NETWERK_SCTP_DATACHANNEL_DATACHANNELPROTOCOL_H_

    10 #if defined(__GNUC__)

    11 #define SCTP_PACKED __attribute__((packed))

    12 #elif defined(_MSC_VER)

    13 #pragma pack (push, 1)

    14 #define SCTP_PACKED

    15 #else

    16 #error "Unsupported compiler"

    17 #endif

    19 // Duplicated in fsm.def

    20 #define WEBRTC_DATACHANNEL_STREAMS_DEFAULT 256

    22 #define DATA_CHANNEL_PPID_CONTROL        50

    23 #define DATA_CHANNEL_PPID_BINARY         52

    24 #define DATA_CHANNEL_PPID_BINARY_LAST    53

    25 #define DATA_CHANNEL_PPID_DOMSTRING      54

    26 #define DATA_CHANNEL_PPID_DOMSTRING_LAST 51

    28 #define DATA_CHANNEL_MAX_BINARY_FRAGMENT 0x4000

    30 #define DATA_CHANNEL_FLAGS_SEND_REQ             0x00000001

    31 #define DATA_CHANNEL_FLAGS_SEND_RSP             0x00000002

    32 #define DATA_CHANNEL_FLAGS_SEND_ACK             0x00000004

    33 #define DATA_CHANNEL_FLAGS_OUT_OF_ORDER_ALLOWED 0x00000008

    34 #define DATA_CHANNEL_FLAGS_SEND_DATA            0x00000010

    35 #define DATA_CHANNEL_FLAGS_FINISH_OPEN          0x00000020

    36 #define DATA_CHANNEL_FLAGS_FINISH_RSP           0x00000040

    37 #define DATA_CHANNEL_FLAGS_EXTERNAL_NEGOTIATED  0x00000080

    38 #define DATA_CHANNEL_FLAGS_WAITING_ACK          0x00000100

    40 #define INVALID_STREAM (0xFFFF)

    41 // max is 0xFFFF: Streams 0 to 0xFFFE = 0xFFFF streams

    42 #define MAX_NUM_STREAMS (2048)

    44 struct rtcweb_datachannel_open_request {

    45   uint8_t  msg_type; // DATA_CHANNEL_OPEN

    46   uint8_t  channel_type;

    47   int16_t  priority;

    48   uint32_t reliability_param;

    49   uint16_t label_length;

    50   uint16_t protocol_length;

    51   char     label[1]; // (and protocol) keep VC++ happy...

    52 } SCTP_PACKED;

    54 struct rtcweb_datachannel_ack {

    55   uint8_t  msg_type; // DATA_CHANNEL_ACK

    56 } SCTP_PACKED;

    58 /* msg_type values: */

    59 /* 0-1 were used in an early version of the protocol with 3-way handshakes */

    60 #define DATA_CHANNEL_ACK                      2

    61 #define DATA_CHANNEL_OPEN_REQUEST             3

    63 /* channel_type values: */

    64 #define DATA_CHANNEL_RELIABLE                 0x00

    65 #define DATA_CHANNEL_PARTIAL_RELIABLE_REXMIT  0x01

    66 #define DATA_CHANNEL_PARTIAL_RELIABLE_TIMED   0x02

    68 #define DATA_CHANNEL_RELIABLE_UNORDERED                0x80

    69 #define DATA_CHANNEL_PARTIAL_RELIABLE_REXMIT_UNORDERED 0x81

    70 #define DATA_CHANNEL_PARTIAL_RELIABLE_TIMED_UNORDERED  0x82

    72 #define ERR_DATA_CHANNEL_ALREADY_OPEN   1

    73 #define ERR_DATA_CHANNEL_NONE_AVAILABLE 2

    75 #if defined(_MSC_VER)

    76 #pragma pack (pop)

    77 #undef SCTP_PACKED

    78 #endif

    80 #endif

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