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81 lines
2.6 KiB
C
81 lines
2.6 KiB
C
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef NETWERK_SCTP_DATACHANNEL_DATACHANNELPROTOCOL_H_
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#define NETWERK_SCTP_DATACHANNEL_DATACHANNELPROTOCOL_H_
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#if defined(__GNUC__)
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#define SCTP_PACKED __attribute__((packed))
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#elif defined(_MSC_VER)
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#pragma pack (push, 1)
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#define SCTP_PACKED
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#else
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#error "Unsupported compiler"
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#endif
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// Duplicated in fsm.def
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#define WEBRTC_DATACHANNEL_STREAMS_DEFAULT 256
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#define DATA_CHANNEL_PPID_CONTROL 50
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#define DATA_CHANNEL_PPID_BINARY 52
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#define DATA_CHANNEL_PPID_BINARY_LAST 53
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#define DATA_CHANNEL_PPID_DOMSTRING 54
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#define DATA_CHANNEL_PPID_DOMSTRING_LAST 51
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#define DATA_CHANNEL_MAX_BINARY_FRAGMENT 0x4000
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#define DATA_CHANNEL_FLAGS_SEND_REQ 0x00000001
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#define DATA_CHANNEL_FLAGS_SEND_RSP 0x00000002
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#define DATA_CHANNEL_FLAGS_SEND_ACK 0x00000004
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#define DATA_CHANNEL_FLAGS_OUT_OF_ORDER_ALLOWED 0x00000008
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#define DATA_CHANNEL_FLAGS_SEND_DATA 0x00000010
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#define DATA_CHANNEL_FLAGS_FINISH_OPEN 0x00000020
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#define DATA_CHANNEL_FLAGS_FINISH_RSP 0x00000040
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#define DATA_CHANNEL_FLAGS_EXTERNAL_NEGOTIATED 0x00000080
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#define DATA_CHANNEL_FLAGS_WAITING_ACK 0x00000100
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#define INVALID_STREAM (0xFFFF)
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// max is 0xFFFF: Streams 0 to 0xFFFE = 0xFFFF streams
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#define MAX_NUM_STREAMS (2048)
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struct rtcweb_datachannel_open_request {
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uint8_t msg_type; // DATA_CHANNEL_OPEN
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uint8_t channel_type;
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int16_t priority;
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uint32_t reliability_param;
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uint16_t label_length;
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uint16_t protocol_length;
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char label[1]; // (and protocol) keep VC++ happy...
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} SCTP_PACKED;
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struct rtcweb_datachannel_ack {
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uint8_t msg_type; // DATA_CHANNEL_ACK
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} SCTP_PACKED;
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/* msg_type values: */
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/* 0-1 were used in an early version of the protocol with 3-way handshakes */
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#define DATA_CHANNEL_ACK 2
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#define DATA_CHANNEL_OPEN_REQUEST 3
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/* channel_type values: */
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#define DATA_CHANNEL_RELIABLE 0x00
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#define DATA_CHANNEL_PARTIAL_RELIABLE_REXMIT 0x01
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#define DATA_CHANNEL_PARTIAL_RELIABLE_TIMED 0x02
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#define DATA_CHANNEL_RELIABLE_UNORDERED 0x80
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#define DATA_CHANNEL_PARTIAL_RELIABLE_REXMIT_UNORDERED 0x81
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#define DATA_CHANNEL_PARTIAL_RELIABLE_TIMED_UNORDERED 0x82
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#define ERR_DATA_CHANNEL_ALREADY_OPEN 1
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#define ERR_DATA_CHANNEL_NONE_AVAILABLE 2
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#if defined(_MSC_VER)
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#pragma pack (pop)
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#undef SCTP_PACKED
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#endif
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#endif
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