No programm in the filter (the CommandCount field of the
HN_BPF_PROGRAMM structure is equal to 0).
HNERR_FLT_BAD_LEN
Instructions count in the filter program is wrong.
HNERR_WRONG_INSTRUCTION
Wrong instruction code.
HNERR_JMP_TO_LONG
Jump is too long.
HNERR_WORK_MEM
The wrong values of instructions working with the memory of the virtual BPF machine (BPF_ST,
BPF_STX, BPF_LD|BPF_MEM, BPF_LDX|BPF_MEM).
HNERR_NO_RET
No return instruction at the end of filter. The Code of the last BPF instruction must be equal
to BPF_RET.
HNERR_INVALID_HANDLE
hFtr parameter is not the HNUserFilter object handle.
Description:
Use the BpfCheckFilter function to check the BPF program accuracy in the
HNUserFilter component. If BpfCheckFilter returns the error code which is
not equal to HNERR_OK, use the BpfGetErrInstruction property to
get the index of the wrong instruction.
