On Jan 13, 2017, at 6:49 AM, Weber René <rwe...@baumer.com> wrote:
> On Jan 11, 2017, at 11:42 PM, Weber René <rwe...@baumer.com> wrote:
>
>>> We working at software for industrial cameras which are supported by the
>>> cameralink standard. We use Wireshark to monitor the control interface. We
>>> have implemented a solution similar like the u3v dissector and uses link
>>> type DLT_USER0. The cameralink interface is basically a serial interface
>>> like rs232 uart.
>
>> So this is for GenCP over a serial port, rather than GenCP-over-UDP?
>
> I don't know a GenCP-over-UDP - where can I find some information about this?
OK, they mentioned UDP here:
http://www.emva.org/wp-content/uploads/GenICam_GenCP_1.2.pdf
but they didn't really mention it as a transport.
>> So do the packets in such a pcap or pcapng file start with the serial prefix
>> described in section 1.5 "Serial Prefix", followed by the common command
>> data described in section 4.3 "Common Command Data", followed by the
>> specific command data for the command in question (section 1.6 "Serial
>> Postfix" says there's no postfix for serial ports)?
>
> correct. U3V in opposite to cameralink has a different prefix and a different
> endian order.
So the GenCP-over-serial endianness is big-endian, as per
Appendix
1. Serial Port Implementations
This section specializes the generic protocol for the use over a serial
link.
1.1. Byteorder
For devices communicating over a serial link the byte order of
bootstrap registers and protocol fields is big-endian.
_______________________________________________
tcpdump-workers mailing list
tcpdump-workers@lists.tcpdump.org
https://lists.sandelman.ca/mailman/listinfo/tcpdump-workers
