106 lines
3.6 KiB
C++
106 lines
3.6 KiB
C++
#include "icsneo/disk/vsa/vsa0f.h"
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#include <algorithm>
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using namespace icsneo;
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static constexpr auto FirstPayloadOffset = 18;
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static constexpr auto FirstPayloadSize = 14;
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static constexpr auto LastPayloadSize = 24;
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static constexpr auto OtherPayloadSize = 28;
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// Parent class functions
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VSA0F::VSA0F(uint8_t* const recordBytes, uint8_t* const messageBytes, size_t numBytes, uint32_t& runningChecksum, Network::CoreMini networkId)
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: VSAExtendedMessage(messageBytes, numBytes, networkId)
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{
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static constexpr auto DWordSize = 4;
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setType(VSA::Type::AA0F);
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setIndex(*reinterpret_cast<uint16_t*>(recordBytes + 2) & 0x01FFu);
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setSequenceNum((*reinterpret_cast<uint16_t*>(recordBytes + 2) & 0xFE00u) >> 9);
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if(getIndex() == 0) {
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runningChecksum = (static_cast<uint32_t>(payload[0]) << 16) | (static_cast<uint32_t>(payload[1]) << 24);
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uint32_t* dwords = reinterpret_cast<uint32_t*>(payload.data() + 2);
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for (size_t i = 0; i < (payload.size() - 2) / DWordSize; i++) {
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runningChecksum += dwords[i];
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}
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} else {
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uint32_t* dwords = reinterpret_cast<uint32_t*>(recordBytes);
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for (size_t i = 0; i < 8; i++) {
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runningChecksum += dwords[i];
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}
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}
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}
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// First Record Functions
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VSA0FFirst::VSA0FFirst(uint8_t* const recordBytes, uint32_t& runningChecksum)
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: VSA0F(recordBytes, recordBytes + FirstPayloadOffset, FirstPayloadSize, runningChecksum)
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{
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captureBitfield = *reinterpret_cast<uint16_t*>(recordBytes + 4);
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uint16_t byteCount = *reinterpret_cast<uint16_t*>(recordBytes + 6);
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uint16_t recordCount;
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if(byteCount <= FirstPayloadSize) {
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recordCount = 1;
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} else if(byteCount <= FirstPayloadSize + LastPayloadSize) {
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recordCount = 2;
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} else {
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byteCount -= FirstPayloadSize + LastPayloadSize;
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recordCount = 2 + byteCount / OtherPayloadSize;
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if (byteCount % OtherPayloadSize != 0) {
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recordCount += 1;
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}
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}
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setRecordCount(recordCount);
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timestamp = *reinterpret_cast<uint64_t*>(recordBytes + 8) & UINT63_MAX;
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checksum = *reinterpret_cast<uint16_t*>(recordBytes + 16);
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doChecksum(recordBytes);
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// Network ID is not found in first record for AA0F
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// Only the subsequent records have the Network ID in the payload
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}
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void VSA0FFirst::doChecksum(uint8_t* recordBytes)
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{
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uint16_t* words = reinterpret_cast<uint16_t*>(recordBytes);
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uint16_t sum = 0;
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for (size_t i = 0; i < 15; i++) {
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sum += words[i];
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}
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setChecksumFailed(sum != checksum);
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}
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void VSA0FFirst::reservePacketData(std::shared_ptr<Packet>& packet) const
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{
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uint32_t numMessageBytes = (getRecordCount() - 2) * OtherPayloadSize + FirstPayloadSize + LastPayloadSize;
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packet->data.reserve(numMessageBytes);
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}
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bool VSA0FFirst::filter(const std::shared_ptr<VSAMessageReadFilter> filter)
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{
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if(filter->captureBitfield != captureBitfield ||
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getICSTimestampFromTimepoint(filter->readRange.first) > getTimestamp() ||
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getICSTimestampFromTimepoint(filter->readRange.second) < getTimestamp()) {
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return false;
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}
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return true;
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}
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// Consecutive Record Functions
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VSA0FConsecutive::VSA0FConsecutive(uint8_t* const recordBytes, uint32_t& runningChecksum, std::shared_ptr<VSA0FFirst> first, bool isLastRecord)
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: VSA0F(recordBytes, recordBytes + 4, isLastRecord ? LastPayloadSize : OtherPayloadSize, runningChecksum)
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{
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this->first = first;
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calculatedChecksum = runningChecksum;
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if(isLastRecord) {
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doChecksum(recordBytes);
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} else {
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network = Network(static_cast<Network::CoreMini>(*reinterpret_cast<uint16_t*>(recordBytes + 28))); // Network ID is stored in 25th and 26th recordBytes of payload
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}
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setRecordCount(first->getRecordCount());
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}
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void VSA0FConsecutive::doChecksum(uint8_t* recordBytes)
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{
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setChecksumFailed(recordBytes && calculatedChecksum != 0);
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} |