[lwip-devel] [patch #10458] ip4_forward: fix checksum recalculation bugs

[David Frey]

URL:
  <https://savannah.nongnu.org/patch/?10458>

                 Summary: ip4_forward: fix checksum recalculation bugs
                   Group: lwIP - A Lightweight TCP/IP stack
               Submitter: dfrey
               Submitted: Thu 30 May 2024 06:01:26 PM UTC
                Category: IPv4
                Priority: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None


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Follow-up Comments:


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Date: Thu 30 May 2024 06:01:26 PM UTC By: David Frey <dfrey>
The commit message of the attached patch has most of the details, but since
writing the patch, I discovered that there is already an
[https://savannah.nongnu.org/patch/?10429 existing patch] that tries to
address this issue, but I don't think it's correct. Specifically, in the case
where LWIP_CHECKSUM_CTRL_PER_NETIF==0 and CHECKSUM_GEN_IP==0, the version in
that patch will *not* zero the IPv4 checksum. The existing patch also doesn't
cover the full set of issues that are covered by this new patch.






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File Attachments:


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Name: 0001-ip4_forward-fix-checksum-recalculation-bugs.patch  Size: 4KiB
<https://file.savannah.nongnu.org/file/0001-ip4_forward-fix-checksum-recalculation-bugs.patch?file_id=56115>

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