2021-05-27 10:59:22 -04:00
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/*
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rlp-tcp.cpp
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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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#include "rlp-tcp.h"
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#include <cstring>
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namespace ACN {
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namespace RLP {
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namespace TCP {
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2021-07-26 21:15:48 -04:00
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/**
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* @brief preamble_t::preamble_t
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* @param stream
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*/
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preamble_t::preamble_t(PDU::Stream stream)
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{
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2021-05-27 10:59:22 -04:00
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stream->read(acn_id, sizeof(acn_id));
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if (stream->gcount() != 12)
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2021-06-19 10:18:09 -04:00
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stream->setstate(std::ios_base::failbit);
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2021-06-18 08:46:30 -04:00
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length = stream->readType<decltype(length)>();
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2021-05-27 10:59:22 -04:00
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}
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2021-07-26 21:15:48 -04:00
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/**
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* @brief preamble_t::operator bool
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* is preamble_t valid ACN EPI 33?
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*
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* Validate compliance with ACN EPI 33. ACN Root Layer Protocol Operation on
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* TCP: 4.2. Reception
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*/
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preamble_t::operator bool ()
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{
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2021-05-27 10:59:22 -04:00
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// 2. Preamble Format: The ACN Packet Identifier shall be the text string
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// “ASC-E1.17\0\0\0” encoded in [ASCII].
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if (memcmp(acn_id, ACN_PACKET_IDENTIFIER, 12))
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return false;
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return true;
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}
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} // TCP
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} // RLP
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} // ACN
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