mirror of
https://github.com/pelgraine/Meck.git
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João Brázio
74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
/**
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* MeshCore - A new lightweight, hybrid routing mesh protocol for packet radios
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* Copyright (c) 2025 Scott Powell / rippleradios.com
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*
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* This project is maintained by the contributors listed in
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* https://github.com/ripplebiz/MeshCore/graphs/contributors
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*
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* MIT License
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*
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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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*
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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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*
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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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*/
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#pragma once
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#include "Packet.h"
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#include "PacketQueue.h"
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#include <Packet.h>
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namespace bridge {
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class SerialBridge {
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private:
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PacketQueue rx_queue, tx_queue;
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protected:
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bool shouldRetransmit(const mesh::Packet *);
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public:
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void loop();
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void setup();
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void readFromSerial();
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void writeToSerial();
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size_t getPacket(uint8_t *);
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size_t sendPacket(const mesh::Packet *);
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static uint16_t calculateCRC(const uint8_t *bytes, size_t len) {
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// Fletcher-16
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// https://en.wikipedia.org/wiki/Fletcher%27s_checksum
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uint8_t sum1 = 0, sum2 = 0;
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for (size_t i = 0; i < len; i++) {
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sum1 = (sum1 + bytes[i]) % 255;
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sum2 = (sum2 + sum1) % 255;
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}
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return (sum2 << 8) | sum1;
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};
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static bool verifyCRC(const uint8_t *bytes, size_t len, uint16_t crc) {
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uint16_t computedChecksum = calculateCRC(bytes, len);
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return (computedChecksum == crc);
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}
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};
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} // namespace bridge
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