tcpdump mailing list archives
Re: [RFC] Addition of link-layer header types for PCI, PCI-X, and PCI-Express
From: Guy Harris via tcpdump-workers <tcpdump-workers () lists tcpdump org>
Date: Sat, 24 Oct 2020 23:05:14 -0700
--- Begin Message --- From: Guy Harris <gharris () sonic net>
Date: Sat, 24 Oct 2020 23:05:14 -0700
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.
--- End Message ---
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Current thread:
- [RFC] Addition of link-layer header types for PCI, PCI-X, and PCI-Express Aki Van Ness via tcpdump-workers (Oct 21)
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- Re: [RFC] Addition of link-layer header types for PCI, PCI-X, and PCI-Express Aki Van Ness via tcpdump-workers (Oct 23)
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- Re: [RFC] Addition of link-layer header types for PCI, PCI-X, and PCI-Express Aki Van Ness via tcpdump-workers (Oct 24)
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- Re: [RFC] Addition of link-layer header types for PCI, PCI-X, and PCI-Express Guy Harris via tcpdump-workers (Oct 24)
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- Re: [RFC] Addition of link-layer header types for PCI, PCI-X, and PCI-Express Aki Van Ness via tcpdump-workers (Oct 25)