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