301 lines
10 KiB
C++
301 lines
10 KiB
C++
#include "DleParser.h"
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#include <fsfw/serviceinterface/ServiceInterface.h>
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#include <cstdio>
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#include <fstream>
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#include <iostream>
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DleParser::DleParser(SimpleRingBuffer& decodeRingBuf, DleEncoder& decoder, BufPair encodedBuf,
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BufPair decodedBuf, UserHandler handler, void* args)
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: decodeRingBuf(decodeRingBuf),
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decoder(decoder),
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encodedBuf(encodedBuf),
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decodedBuf(decodedBuf),
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handler(handler),
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ctx(args) {
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if (handler == nullptr) {
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#if FSFW_CPP_OSTREAM_ENABLED == 1
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sif::error << "DleParser::DleParser: Invalid user handler" << std::endl;
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#else
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sif::printError("DleParser::DleParser: Invalid user handler\n");
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#endif
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}
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}
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ReturnValue_t DleParser::passData(const uint8_t* data, size_t len) {
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if (data == nullptr or len == 0 or handler == nullptr) {
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return returnvalue::FAILED;
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}
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return decodeRingBuf.writeData(data , len);
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// std::string filename = std::string("/mnt/sd0/scex/transfer") + std::to_string(COUNTER++);
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// std::ofstream of(filename);
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// of.write(reinterpret_cast<const char*>(data), len);
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// size_t copyIntoRingBufFromHere = 0;
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// size_t copyAmount = len;
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// size_t startIdx = 0;
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// ReturnValue_t result = returnvalue::OK;
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// bool startFoundInThisPacket = false;
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// for (size_t idx = 0; idx < len; idx++) {
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// if (data[idx] == DleEncoder::STX_CHAR) {
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// if (not startFound and not startFoundInThisPacket) {
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// startIdx = idx;
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// copyIntoRingBufFromHere = idx;
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// copyAmount = len - idx;
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// } else {
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// // Maybe print warning, should not happen
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// decodeRingBuf.clear();
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// ErrorInfo info;
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// info.len = idx;
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// prepareErrorContext(ErrorTypes::CONSECUTIVE_STX_CHARS, info);
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// handler(ctx);
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// copyIntoRingBufFromHere = idx;
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// copyAmount = len - idx;
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// }
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// startFound = true;
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// startFoundInThisPacket = true;
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// } else if (data[idx] == DleEncoder::ETX_CHAR) {
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// if (startFoundInThisPacket) {
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// size_t readLen = 0;
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// size_t decodedLen = 0;
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// result = decoder.decode(data + startIdx, idx + 1 - startIdx, &readLen, decodedBuf.first,
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// decodedBuf.second, &decodedLen);
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// if (result == returnvalue::OK) {
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// ctx.setType(ContextType::PACKET_FOUND);
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// ctx.decodedPacket.first = decodedBuf.first;
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// ctx.decodedPacket.second = decodedLen;
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// this->handler(ctx);
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// } else if (result == DleEncoder::STREAM_TOO_SHORT) {
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// ErrorInfo info;
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// info.res = result;
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// prepareErrorContext(ErrorTypes::DECODING_BUF_TOO_SMALL, info);
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// handler(ctx);
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// } else {
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// ErrorInfo info;
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// info.res = result;
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// prepareErrorContext(ErrorTypes::DECODING_BUF_TOO_SMALL, info);
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// handler(ctx);
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// }
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// decodeRingBuf.clear();
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// if ((idx + 1) < len) {
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// copyIntoRingBufFromHere = idx + 1;
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// copyAmount = len - idx - 1;
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// } else {
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// copyAmount = 0;
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// }
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// } else if (startFound) {
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// // ETX found but STX was found in another mini packet. Reconstruct the full packet
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// // to decode it
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// result = decodeRingBuf.writeData(data, idx + 1);
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// if (result != returnvalue::OK) {
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// ErrorInfo info;
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// info.res = result;
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// prepareErrorContext(ErrorTypes::RING_BUF_ERROR, info);
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// handler(ctx);
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// }
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// size_t fullEncodedLen = decodeRingBuf.getAvailableReadData();
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// if (fullEncodedLen > encodedBuf.second) {
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// ErrorInfo info;
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// info.len = fullEncodedLen;
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// prepareErrorContext(ErrorTypes::ENCODED_BUF_TOO_SMALL, info);
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// handler(ctx);
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// decodeRingBuf.clear();
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// } else {
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// size_t decodedLen = 0;
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// size_t readLen = 0;
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// decodeRingBuf.readData(encodedBuf.first, fullEncodedLen, true);
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// result = decoder.decode(encodedBuf.first, fullEncodedLen, &readLen, decodedBuf.first,
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// decodedBuf.second, &decodedLen);
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// if (result == returnvalue::OK) {
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// if (this->handler != nullptr) {
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// ctx.setType(ContextType::PACKET_FOUND);
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// ctx.decodedPacket.first = decodedBuf.first;
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// ctx.decodedPacket.second = decodedLen;
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// this->handler(ctx);
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// }
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// } else if (result == DleEncoder::STREAM_TOO_SHORT) {
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// ErrorInfo info;
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// info.res = result;
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// prepareErrorContext(ErrorTypes::DECODING_BUF_TOO_SMALL, info);
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// handler(ctx);
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// } else {
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// ErrorInfo info;
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// info.res = result;
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// prepareErrorContext(ErrorTypes::DECODE_ERROR, info);
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// handler(ctx);
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// }
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// decodeRingBuf.clear();
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// startFound = false;
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// startFoundInThisPacket = false;
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// if ((idx + 1) < len) {
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// copyIntoRingBufFromHere = idx + 1;
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// copyAmount = len - idx - 1;
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// } else {
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// copyAmount = 0;
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// }
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// }
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// } else {
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// // End data without preceeding STX
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// ErrorInfo info;
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// info.len = idx + 1;
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// prepareErrorContext(ErrorTypes::CONSECUTIVE_ETX_CHARS, info);
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// handler(ctx);
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// decodeRingBuf.clear();
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// if ((idx + 1) < len) {
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// copyIntoRingBufFromHere = idx + 1;
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// copyAmount = len - idx - 1;
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// } else {
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// copyAmount = 0;
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// }
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// }
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// startFoundInThisPacket = false;
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// startFound = false;
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// }
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// }
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// if (copyAmount > 0) {
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// result = decodeRingBuf.writeData(data + copyIntoRingBufFromHere, copyAmount);
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// if (result != returnvalue::OK) {
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// ErrorInfo info;
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// info.res = result;
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// prepareErrorContext(ErrorTypes::RING_BUF_ERROR, info);
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// handler(ctx);
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// }
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// }
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}
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ReturnValue_t DleParser::parseRingBuf(size_t& readSize) {
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size_t availableData = decodeRingBuf.getAvailableReadData();
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if (availableData > encodedBuf.second) {
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ErrorInfo info;
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info.len = decodeRingBuf.getAvailableReadData();
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prepareErrorContext(ErrorTypes::DECODING_BUF_TOO_SMALL, info);
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handler(ctx);
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}
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ReturnValue_t result = decodeRingBuf.readData(encodedBuf.first, availableData);
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if(result != returnvalue::OK) {
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ErrorInfo info;
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info.res = result;
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prepareErrorContext(ErrorTypes::RING_BUF_ERROR, info);
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}
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bool stxFound = false;
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size_t stxIdx = 0;
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for (size_t vectorIdx = 0; vectorIdx < availableData; vectorIdx++) {
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// handle STX char
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if (encodedBuf.first[vectorIdx] == DleEncoder::STX_CHAR) {
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if (not stxFound) {
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stxFound = true;
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stxIdx = vectorIdx;
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} else {
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// might be lost packet, so we should advance the read pointer
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// without skipping the STX
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readSize = vectorIdx;
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return POSSIBLE_PACKET_LOSS;
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}
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}
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// handle ETX char
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if (encodedBuf.first[vectorIdx] == DleEncoder::ETX_CHAR) {
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if (stxFound) {
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// This is propably a packet, so we decode it.
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size_t decodedLen = 0;
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size_t dummy = 0;
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readSize = vectorIdx;
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ReturnValue_t result = decoder.decode(&encodedBuf.first[stxIdx], availableData - stxIdx,
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&dummy, decodedBuf.first, decodedBuf.second, &decodedLen);
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if (result == returnvalue::OK) {
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ctx.setType(ContextType::PACKET_FOUND);
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ctx.decodedPacket.first = decodedBuf.first;
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ctx.decodedPacket.second = decodedLen;
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this->handler(ctx);
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return returnvalue::OK;
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} else {
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// invalid packet, skip.
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readSize = ++vectorIdx;
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return POSSIBLE_PACKET_LOSS;
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}
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} else {
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// might be lost packet, so we should advance the read pointer
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readSize = ++vectorIdx;
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return POSSIBLE_PACKET_LOSS;
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}
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}
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}
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return returnvalue::OK;
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}
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void DleParser::defaultFoundPacketHandler(uint8_t* packet, size_t len, void* args) {
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#if FSFW_VERBOSE_LEVEL >= 1
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#if FSFW_CPP_OSTREAM_ENABLED == 1
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sif::info << "DleParserBase::handleFoundPacket: Detected DLE packet with " << len << " bytes"
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<< std::endl;
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#else
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sif::printInfo("DleParserBase::handleFoundPacket: Detected DLE packet with %d bytes\n", len);
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#endif
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#endif
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}
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void DleParser::defaultErrorHandler(ErrorTypes err, ErrorInfo ctx) {
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switch (err) {
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case (ErrorTypes::NONE): {
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errorPrinter("No error");
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break;
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}
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case (ErrorTypes::DECODE_ERROR): {
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errorPrinter("Decode Error");
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break;
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}
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case (ErrorTypes::RING_BUF_ERROR): {
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errorPrinter("Ring Buffer Error");
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break;
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}
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case (ErrorTypes::ENCODED_BUF_TOO_SMALL):
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case (ErrorTypes::DECODING_BUF_TOO_SMALL): {
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char opt[64];
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snprintf(opt, sizeof(opt), ": Too small for packet with length %zu", ctx.len);
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if (err == ErrorTypes::ENCODED_BUF_TOO_SMALL) {
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errorPrinter("Encoded buf too small", opt);
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} else {
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errorPrinter("Decoding buf too small", opt);
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}
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break;
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}
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case (ErrorTypes::CONSECUTIVE_STX_CHARS): {
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errorPrinter("Consecutive STX chars detected");
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break;
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}
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case (ErrorTypes::CONSECUTIVE_ETX_CHARS): {
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errorPrinter("Consecutive ETX chars detected");
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break;
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}
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}
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}
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void DleParser::errorPrinter(const char* str, const char* opt) {
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if (opt == nullptr) {
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opt = "";
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}
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#if FSFW_VERBOSE_LEVEL >= 1
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#if FSFW_CPP_OSTREAM_ENABLED == 1
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sif::info << "DleParserBase::handleParseError: " << str << opt << std::endl;
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#else
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sif::printInfo("DleParserBase::handleParseError: %s%s\n", str, opt);
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#endif
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#endif
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}
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void DleParser::prepareErrorContext(ErrorTypes err, ErrorInfo info) {
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ctx.setType(ContextType::ERROR);
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ctx.error.first = err;
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ctx.error.second = info;
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}
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ReturnValue_t DleParser::confirmBytesRead(size_t bytesRead) {
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return decodeRingBuf.deleteData(bytesRead);
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}
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void DleParser::reset() {
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startFound = false;
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decodeRingBuf.clear();
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}
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