69 lines
2.3 KiB
C++
69 lines
2.3 KiB
C++
/*
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rlp/udp.h
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Copyright (c) 2020 Kevin Matz (kevin.matz@gmail.com)
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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#pragma once
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#include "rlp.h"
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#include "acn/pdu.h"
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// ACN EPI 17. ACN Root Layer Protocol Operation on UDP
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namespace ACN::RLP::UDP {
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/**
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* @brief ACN_PACKET_IDENTIFIER
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* The ACN Packet Identifier shall be the text string “ASC-E1.17\0\0\0”
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* encoded in [ASCII].
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*/
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static const uint8_t ACN_PACKET_IDENTIFIER[] = { 0x41, 0x53, 0x43, 0x2d,
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0x45, 0x31, 0x2e, 0x31,
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0x37, 0x00, 0x00, 0x00 };
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/**
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* @brief PREAMBLE_MINIMUM_SIZE
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* The preamble size includes both size fields so the minimum value for
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* preamble size is 16 (octets).
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*/
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static const uint8_t PREAMBLE_MINIMUM_SIZE = 16;
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/**
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* @brief 2. Preamble Format
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*/
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struct transport
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: RLP::message_transport
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{
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transport(bool filled = false);
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uint16_t length = 0; //!< length of preamble + PDU block
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uint16_t postamble_size = 0; //!< length of postamble
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uint8_t acn_id[12]; //!< packet identifier
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size_t streamSize() const override { return PREAMBLE_MINIMUM_SIZE
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+ root.streamSize(); }
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void iStream(PDU::Stream) override;
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void oStream(PDU::Stream) const override;
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};
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} // ACN::RLP::UDP
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