lwIP - A Lightweight TCP/IP stack - Patches: patch #10429, ip4: don't zero checksum on...
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patch #10429: ip4: don't zero checksum on forwarding
Submitter: | Andrew Tridgell <tridge> | ||
Submitted: | Wed 10 Jan 2024 04:50:41 AM UTC | ||
Category: | None | Priority: | 5 - Normal |
Status: | None | Privacy: | Public |
Assigned to: | None | Open/Closed: | Open |
Planned Release: | None |
Attached Files
Depends on the following items: None found
Items that depend on this one: None found
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Follows 1 latest change.
Date | Changed by | Updated Field | Previous Value | => | Replaced by |
---|---|---|---|---|---|
2024-01-10 | tridge | Attached File | - | Added 0002-ip4-don-t-zero-checksum-on-forwarding.patch, #55548 |
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Corresponding source code
this fixes IP forwarding for systems that don't have hardware checksumming on the output interface. The CHECKSUM_GEN_xxx checks meant that lwip was unconditionally zeroing the checksums when forwarding was enabled, the the checksums were not being re-calculated before sending, resulting in zero checksum on the forwarded output packets