On Aug 25, 2018, at 1:27 PM, Guy Harris <ghar...@sonic.net> wrote: > On Aug 25, 2018, at 1:10 PM, Matwey V. Kornilov <matwey.korni...@gmail.com> > wrote: > >> Answering your questions and Michael question, the url describes the >> data coming from the hardware as is. Its format is defined by the >> people developing FPGA firmware, that is currently not quite active: >> https://github.com/openvizsla/ov_ftdi/tree/master/software/fpga So it >> is unlikely that the format will change dramatically, but I just would >> like to follow initial format as close as possible. > > I suspected that's what the FPGA delivered. > >> However, I agree that we can just use the following simple >> representation for pcap: >> >> struct { >> uint32_t timestamp; >> uint16_t flags; >> uint8_t usb_packet[]; >> }; > > So your code to construct pcap files (or your libpcap module) would shuffle > the header data around before providing the packet?
So which would be better: 1) the raw data from https://github.com/matwey/libopenvizsla/wiki/OpenVizsla-protocol-description is what's in the packet in a pcap or pcapng file, and we just note that the Size field is redundant (it's the captured length minus 8 for the header) or 2) the simple representation? We can do either one. _______________________________________________ tcpdump-workers mailing list tcpdump-workers@lists.tcpdump.org https://lists.sandelman.ca/mailman/listinfo/tcpdump-workers