Re: MPLS over UDP decoding

[Yang Yu <yang.yu.list () gmail com>]

On Fri, Dec 28, 2018 at 1:07 PM Guy Harris <guy () alum mit edu> wrote:
> From looking at the code, the logic appears to be "is the traffic to or from UDP port 6635?"
>
> So *is* the traffic to or from UDP port 6635?

indeed udp.dstport is 6635 (IANA assigned for mpls-udp), so it turned
out a host was using udp/6635 as ephemeral port to connect to a STUN
server
https://github.com/wireshark/wireshark/blob/075785bd20cad395141481a8a9639022bb963aee/services#L4843
https://github.com/wireshark/wireshark/blob/1539e455d70c5f340ce80021c770b8f992051ec2/epan/dissectors/packet-mpls.h#L67


Thanks a lot.
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