netwerk/sctp/datachannel/DataChannelProtocol.h

   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/. */
   6
   7 #ifndef NETWERK_SCTP_DATACHANNEL_DATACHANNELPROTOCOL_H_
   8 #define NETWERK_SCTP_DATACHANNEL_DATACHANNELPROTOCOL_H_
   9
  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
  18
  19 #define WEBRTC_DATACHANNEL_STREAMS_DEFAULT 256
  20 // Do not change this value!
  21 #define WEBRTC_DATACHANNEL_PORT_DEFAULT 5000
  22 // TODO: Bug 1381146, change once we resolve the nsCString limitation
  23 #define WEBRTC_DATACHANNEL_MAX_MESSAGE_SIZE_LOCAL 1073741823
  24 #define WEBRTC_DATACHANNEL_MAX_MESSAGE_SIZE_REMOTE_DEFAULT 65536
  25 // TODO: Bug 1382779, once resolved, can be increased to min(Uint8ArrayMaxSize,
  26 // UINT32_MAX)
  27 // TODO: Bug 1381146, once resolved, can be increased to whatever we support
  28 //       then (hopefully SIZE_MAX) or be removed
  29 #define WEBRTC_DATACHANNEL_MAX_MESSAGE_SIZE_REMOTE 2147483637
  30
  31 #define DATA_CHANNEL_PPID_CONTROL 50
  32 #define DATA_CHANNEL_PPID_BINARY_PARTIAL 52
  33 #define DATA_CHANNEL_PPID_BINARY 53
  34 #define DATA_CHANNEL_PPID_DOMSTRING_PARTIAL 54
  35 #define DATA_CHANNEL_PPID_DOMSTRING 51
  36 #define DATA_CHANNEL_PPID_DOMSTRING_EMPTY 56
  37 #define DATA_CHANNEL_PPID_BINARY_EMPTY 57
  38
  39 #define DATA_CHANNEL_MAX_BINARY_FRAGMENT 0x4000
  40
  41 #define DATA_CHANNEL_BUFFER_MESSAGE_FLAGS_TOO_LARGE 0x01
  42 #define DATA_CHANNEL_BUFFER_MESSAGE_FLAGS_BUFFERED 0x02
  43 #define DATA_CHANNEL_BUFFER_MESSAGE_FLAGS_COMPLETE 0x04
  44
  45 #define INVALID_STREAM (0xFFFF)
  46 // max is 0xFFFF: Streams 0 to 0xFFFE = 0xFFFF streams
  47 #define MAX_NUM_STREAMS (2048)
  48
  49 struct rtcweb_datachannel_open_request {
  50   uint8_t msg_type;  // DATA_CHANNEL_OPEN
  51   uint8_t channel_type;
  52   int16_t priority;
  53   uint32_t reliability_param;
  54   uint16_t label_length;
  55   uint16_t protocol_length;
  56   char label[1];  // (and protocol) keep VC++ happy...
  57 } SCTP_PACKED;
  58
  59 struct rtcweb_datachannel_ack {
  60   uint8_t msg_type;  // DATA_CHANNEL_ACK
  61 } SCTP_PACKED;
  62
  63 /* msg_type values: */
  64 /* 0-1 were used in an early version of the protocol with 3-way handshakes */
  65 #define DATA_CHANNEL_ACK 2
  66 #define DATA_CHANNEL_OPEN_REQUEST 3
  67
  68 /* channel_type values: */
  69 #define DATA_CHANNEL_RELIABLE 0x00
  70 #define DATA_CHANNEL_PARTIAL_RELIABLE_REXMIT 0x01
  71 #define DATA_CHANNEL_PARTIAL_RELIABLE_TIMED 0x02
  72
  73 #define DATA_CHANNEL_RELIABLE_UNORDERED 0x80
  74 #define DATA_CHANNEL_PARTIAL_RELIABLE_REXMIT_UNORDERED 0x81
  75 #define DATA_CHANNEL_PARTIAL_RELIABLE_TIMED_UNORDERED 0x82
  76
  77 #define ERR_DATA_CHANNEL_ALREADY_OPEN 1
  78 #define ERR_DATA_CHANNEL_NONE_AVAILABLE 2
  79
  80 #if defined(_MSC_VER)
  81 #  pragma pack(pop)
  82 #  undef SCTP_PACKED
  83 #endif
  84
  85 #endif