splitter

func EstimatePacketCount ¶

func EstimatePacketCount(data []byte) int

EstimatePacketCount estimates the number of complete packets in the data This is a quick check without full parsing

func GetPacketType ¶

func GetPacketType(packet []byte) (byte, error)

GetPacketType returns the protocol number from a packet Returns 0 and error if packet is invalid

func GetSerialNumber ¶

func GetSerialNumber(packet []byte) (uint16, error)

GetSerialNumber extracts the serial number from a packet Serial number is always 2 bytes before CRC

func HasCompletePacket ¶

func HasCompletePacket(data []byte) bool

HasCompletePacket quickly checks if the data contains at least one complete packet

func SplitPackets ¶

func SplitPackets(data []byte) (packets [][]byte, residue []byte, err error)

SplitPackets splits concatenated packets from a TCP stream GPS devices often send multiple packets in a single TCP write, or packets may be fragmented across multiple reads.

Returns: - packets: Complete packets found in the data - residue: Incomplete packet data to be prepended to next read - error: Any error encountered during splitting

Example:

Input:  [CompletePacket1][CompletePacket2][PartialPacket3]
Output: packets=[Packet1, Packet2], residue=[PartialPacket3]

func ValidatePacketStructure ¶

func ValidatePacketStructure(packet []byte) error

ValidatePacketStructure performs basic structural validation on a packet without decoding the full content