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more simplfications

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This commit is contained in:
Robin Müller 2022-09-01 10:51:09 +02:00
parent 28ecd0e5c6
commit 01651f0521
3 changed files with 40 additions and 73 deletions
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9
src/fsfw/osal/common/TcpTmTcServer.cpp
View File

@ -335,13 +335,13 @@ ReturnValue_t TcpTmTcServer::handleTcRingBufferData(size_t availableReadData) {
}
ringBuffer.readData(receptionBuffer.data(), readAmount, true);
const uint8_t* bufPtr = receptionBuffer.data();
FoundPacketInfo info;
ParsingState parseState;
while (parseState.amountRead < readAmount) {
SpacePacketParser::FoundPacketInfo info;
if (spacePacketParser == nullptr) {
return returnvalue::FAILED;
}
result = spacePacketParser->parseSpacePackets(&bufPtr, readAmount, info, parseState);
spacePacketParser->reset();
while (spacePacketParser->getAmountRead() < readAmount) {
result = spacePacketParser->parseSpacePackets(&bufPtr, readAmount, info);
switch (result) {
case (SpacePacketParser::NO_PACKET_FOUND):
case (SpacePacketParser::SPLIT_PACKET): {
@ -356,7 +356,6 @@ ReturnValue_t TcpTmTcServer::handleTcRingBufferData(size_t availableReadData) {
}
ringBuffer.deleteData(info.sizeFound);
lastRingBufferSize = ringBuffer.getAvailableReadData();
// std::memset(receptionBuffer.data() + startIdx, 0, foundSize);
}
return status;
}

32
src/fsfw/tmtcservices/SpacePacketParser.cpp
View File

@ -6,17 +6,9 @@
SpacePacketParser::SpacePacketParser(std::vector<uint16_t> validPacketIds)
: validPacketIds(validPacketIds) {}
ReturnValue_t SpacePacketParser::parseSpacePackets(const uint8_t* buffer, const size_t maxSize,
FoundPacketInfo& packetInfo,
ParsingState& parsingState) {
const uint8_t** tempPtr = &buffer;
return parseSpacePackets(tempPtr, maxSize, packetInfo, parsingState);
}
ReturnValue_t SpacePacketParser::parseSpacePackets(const uint8_t** buffer, const size_t maxSize,
FoundPacketInfo& packetInfo,
ParsingState& parsingState) {
if (buffer == nullptr or parsingState.nextStartIdx > maxSize) {
FoundPacketInfo& packetInfo) {
if (buffer == nullptr or nextStartIdx > maxSize) {
#if FSFW_CPP_OSTREAM_ENABLED == 1
sif::warning << "SpacePacketParser::parseSpacePackets: Frame invalid" << std::endl;
#else
@ -30,11 +22,7 @@ ReturnValue_t SpacePacketParser::parseSpacePackets(const uint8_t** buffer, const
uint16_t lengthField = (bufPtr[localIdx + 4] << 8) | bufPtr[localIdx + 5];
size_t packetSize = lengthField + 7;
ReturnValue_t result = returnvalue::OK;
if (lengthField == 0) {
// Skip whole header for now
packetInfo.sizeFound = 6;
result = NO_PACKET_FOUND;
} else if (packetSize + localIdx + parsingState.amountRead > maxSize) {
if (packetSize + localIdx + amountRead > maxSize) {
// Don't increment buffer and read length here, user has to decide what to do
packetInfo.sizeFound = packetSize;
return SPLIT_PACKET;
@ -42,20 +30,20 @@ ReturnValue_t SpacePacketParser::parseSpacePackets(const uint8_t** buffer, const
packetInfo.sizeFound = packetSize;
}
*buffer += packetInfo.sizeFound;
packetInfo.startIdx = localIdx + parsingState.amountRead;
parsingState.nextStartIdx = localIdx + parsingState.amountRead + packetInfo.sizeFound;
parsingState.amountRead = parsingState.nextStartIdx;
packetInfo.startIdx = localIdx + amountRead;
nextStartIdx = localIdx + amountRead + packetInfo.sizeFound;
amountRead = nextStartIdx;
return result;
};
size_t idx = 0;
// Space packet ID as start marker
if (validPacketIds.size() > 0) {
while (idx + parsingState.amountRead < maxSize - 5) {
while (idx + amountRead < maxSize - 5) {
uint16_t currentPacketId = (bufPtr[idx] << 8) | bufPtr[idx + 1];
if (std::find(validPacketIds.begin(), validPacketIds.end(), currentPacketId) !=
validPacketIds.end()) {
if (idx + parsingState.amountRead >= maxSize - 5) {
if (idx + amountRead >= maxSize - 5) {
return SPLIT_PACKET;
}
return verifyLengthField(idx);
@ -63,9 +51,9 @@ ReturnValue_t SpacePacketParser::parseSpacePackets(const uint8_t** buffer, const
idx++;
}
}
parsingState.nextStartIdx = maxSize;
nextStartIdx = maxSize;
packetInfo.sizeFound = maxSize;
parsingState.amountRead = maxSize;
amountRead = maxSize;
*buffer += maxSize;
return NO_PACKET_FOUND;
}

66
src/fsfw/tmtcservices/SpacePacketParser.h
View File

@ -7,16 +7,6 @@
#include "fsfw/container/DynamicFIFO.h"
#include "fsfw/returnvalues/FwClassIds.h"
struct FoundPacketInfo {
size_t startIdx = 0;
size_t sizeFound = 0;
};
struct ParsingState {
size_t nextStartIdx = 0;
size_t amountRead = 0;
};
/**
* @brief This small helper class scans a given buffer for space packets.
* Can be used if space packets are serialized in a tightly packed frame.
@ -27,9 +17,11 @@ struct ParsingState {
*/
class SpacePacketParser {
public:
//! The first entry is the index inside the buffer while the second index
//! is the size of the PUS packet starting at that index.
using IndexSizePair = std::pair<size_t, size_t>;
struct FoundPacketInfo {
size_t startIdx = 0;
size_t sizeFound = 0;
};
static constexpr uint8_t INTERFACE_ID = CLASS_ID::SPACE_PACKET_PARSER;
static constexpr ReturnValue_t NO_PACKET_FOUND = MAKE_RETURN_CODE(0x00);
@ -46,44 +38,32 @@ class SpacePacketParser {
SpacePacketParser(std::vector<uint16_t> validPacketIds);
/**
* Parse a given frame for space packets but also increment the given buffer and assign the
* total number of bytes read so far
* Parse a given frame for space packets but also increments the given buffer.
* @param buffer Parser will look for space packets in this buffer
* @param maxSize Maximum size of the buffer
* @param startIndex Start index of a found space packet
* @param foundSize Found size of the space packet
* @param readLen Length read so far. This value is incremented by the number of parsed
* bytes which also includes the size of a found packet
* -@c NO_PACKET_FOUND if no packet was found in the given buffer or the length field is
* invalid. foundSize will be set to the size of the space packet header. buffer and
* readLen will be incremented accordingly.
* -@c SPLIT_PACKET if a packet was found but the detected size exceeds maxSize. foundSize
* will be set to the detected packet size and startIndex will be set to the start of the
* detected packet. buffer and read length will not be incremented but the found length
* will be assigned.
* -@c returnvalue::OK if a packet was found
* @param packetInfo Information about packets found.
* -@c NO_PACKET_FOUND if no packet was found in the given buffer
* -@c SPLIT_PACKET if a packet was found but the detected size exceeds maxSize. packetInfo
* will contain the detected packet size and start index.
* -@c returnvalue::OK if a packet was found. Packet size and start index will be set in
* packetInfo
*/
ReturnValue_t parseSpacePackets(const uint8_t** buffer, const size_t maxSize,
FoundPacketInfo& packetInfo, ParsingState& parsingState);
FoundPacketInfo& packetInfo);
/**
* Parse a given frame for space packets
* @param buffer Parser will look for space packets in this buffer
* @param maxSize Maximum size of the buffer
* @param startIndex Start index of a found space packet
* @param foundSize Found size of the space packet
* -@c NO_PACKET_FOUND if no packet was found in the given buffer or the length field is
* invalid. foundSize will be set to the size of the space packet header
* -@c SPLIT_PACKET if a packet was found but the detected size exceeds maxSize. foundSize
* will be set to the detected packet size and startIndex will be set to the start of the
* detected packet
* -@c returnvalue::OK if a packet was found
*/
ReturnValue_t parseSpacePackets(const uint8_t* buffer, const size_t maxSize,
FoundPacketInfo& packetInfo, ParsingState& parsingState);
size_t getAmountRead() {
return amountRead;
}
void reset() {
nextStartIdx = 0;
amountRead = 0;
}
private:
std::vector<uint16_t> validPacketIds;
size_t nextStartIdx = 0;
size_t amountRead = 0;
};
#endif /* FRAMEWORK_TMTCSERVICES_PUSPARSER_H_ */