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Want better integration of Internet checksums #6

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FelixMcFelix opened this issue Nov 22, 2024 · 0 comments

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FelixMcFelix commented Nov 22, 2024

OPTE currently has a lot of manual handling of Internet checksums for the types we expose here. Some things we maybe want to generate code for:

Computing and storing Internet checksum values for header bytes correctly.
Capture the notions of pseudoheaders, used between layers in a packet.
Tracking whether checksums include the body of a packet (e.g., IPv4 (header-only) vs. TCP/UDP), and including this data (split over multipel buffers?).
Computing Internet checksum over an arbitrary buffer. We can maybe pull htis in from OPTE.
Possible checksum validation.

These mechanisms should be optional, particularly when processing packets expecting offload of these capabilities.

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