ebpf

Bumping up against a verifier bug i think. The verifier tells me that R3 min value is outside of the allowed memory range. The verifier gets as far as line 55 payload[i] = ..., oddly the llvm ends up generating ~6k instructions, i think this is symtomatic of the bug or another bug in the verifier. Going to try and trace the path in the verifier

try the loop a different way

push up changes, currently fighting the verifier, have verified by hand that we are not accessing memory outside packet bounds, suspect that this is a verifier edge case where a register is

extract udp payload and try to copy it into the ringbuffer, currently fighting with the verifier about using payload_size instead of sizeof(something)