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On Oct 21, 2020, at 1:56 PM, Aki Van Ness via tcpdump-workers
<tcpdump-workers@lists.tcpdump.org> wrote:
> I'm working on a project that plans to store PCI and PCI-Express
> packets in the pcapng format as that's the most appropriate storage
> format and I really rather not roll something custom.
>
> As such what are thoughts on adding Link-Layer types for PCI, PCI-X,
> and PCI-Express?
It seems reasonable, given that we have USB, Infiniband, and the DisplayPort
AUX channel.
> And would you want to group all versions of PCI, PCI-X, and
> PCI-Express together or have them be their own values?
Would each version need its own LINKTYPE_ value, or would a single metadata
header and payload suffice for all versions of PCI, all versions of PCI-X, and
all versions of PCIe? From a quick look at the Wikipedia pages for those, for
what that's worth, they changes for each seem to be at the physical layer, with
full or at least significant backwards compatibility, so, other than additional
bits of metadata, would LINKTYPE_PCI, LINKTYPE_PCI_X, and LINKTYPE_PCI_EXPRESS
suffice?
I'm assuming that the metadata would be different between PCI, PCI-X, and PCIe.
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