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fix(ipv6): a jumbogram's payload is not dissected and is reported as trailer #1434

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#1440
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fix(ipv6): a jumbogram's payload is not dissected and is reported as trailer#1434
#1440
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fixPull requests that fix a defect (fix: subject prefix)
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PyPCAPKit v1.5

Description

@JarryShaw
JarryShaw
opened on Oct 8, 2026

Describe the bug
An IPv6 jumbogram (Payload Length 0 plus a Hop-by-Hop Jumbo Payload option, RFC 2675) does not parse its payload. On main the next layer is NoPayload and the rebuild is lossy: 72 → 40 bare, 86 → 54 inside Ethernet. #1431 makes the bytes round-trip exactly, but only by reporting the whole jumbo payload as trailer.

Expected behavior
When a Jumbo option is present with Payload Length 0, the Jumbo Payload Length gives the payload extent. The payload is dissected as the next header, and only octets beyond it are trailer.

Found by the #1431 cross-review. Blocked until #1431 merges, since it owns protocols/{,schema/,data/}internet/ipv6.py.

Activity

  1. JarryShaw
    added
    fixPull requests that fix a defect (fix: subject prefix)
    blockedDeferred pending another issue or decision; see the last comment for what unblocks it
    on Oct 8, 2026
  2. JarryShaw
    added this to PyPCAPKiton Oct 8, 2026

  3. JarryShaw commented on Oct 8, 2026

    @JarryShaw
    JarryShaw
    on Oct 8, 2026
    OwnerAuthor

    Unblocked: #1431 merged (0ace21349), so protocols/{,schema/,data/}internet/ipv6.py is free. Moving to pending.

  4. JarryShaw
    added
    pendingAccepted and unstarted - nobody is on it and nothing blocks it
    and removed
    blockedDeferred pending another issue or decision; see the last comment for what unblocks it
    on Oct 8, 2026

  5. JarryShaw commented on Oct 8, 2026

    @JarryShaw
    JarryShaw
    on Oct 8, 2026
    OwnerAuthor

    A worker is on it now, on branch fix/1434-ipv6-jumbogram-payload.

  6. JarryShaw
    added
    wipWork in flight - a covering PR is open or an agent is actively on it
    and removed
    pendingAccepted and unstarted - nobody is on it and nothing blocks it
    on Oct 8, 2026
  7. JarryShaw
    closed this as completedin #1440on Oct 8, 2026
  8. JarryShaw
    added a commit that references this issue on Oct 8, 2026

    fix(ipv6): dissect a jumbogram's payload up to its Jumbo Payload Leng…

    7c62038
  9. JarryShaw
    removed
    wipWork in flight - a covering PR is open or an agent is actively on it
    on Oct 8, 2026
  10. JarryShaw
    added this to the PyPCAPKit v1.5 milestone on Oct 26, 2026
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