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monitor: ignore short non-gluon vendor IEs without logging an error - #13

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grische:monitor-ignore-short-vendor-ies
May 16, 2026
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monitor: ignore short non-gluon vendor IEs without logging an error#13
blocktrron merged 1 commit into
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grische:monitor-ignore-short-vendor-ies

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@grische

@grische grische commented May 14, 2026

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The IE parser checked ie_len < 9 and log_error()'d "IE is too short." before validating the OUI, so any third-party vendor-specific IE (tag 0xdd) shorter than 9 bytes was logged as an error even though it was never destined for us. WiFi scans routinely showed such IEs from other devices.

Validate only the 6 bytes needed for the OUI/type compare first, then re-check the full length after the IE is confirmed to be a gluon node IE so a genuinely truncated one is still logged as an error.

The IE parser checked ie_len < 9 and log_error()'d "IE is too short."
before validating the OUI, so any third-party vendor-specific IE
(tag 0xdd) shorter than 9 bytes was logged as an error even though it
was never destined for us. WiFi scans routinely showed such IEs from
other devices.

Validate only the 6 bytes needed for the OUI/type compare first, then
re-check the full length after the IE is confirmed to be a gluon node
IE so a genuinely truncated one is still logged as an error.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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blocktrron merged commit c0f0954 into blocktrron:master May 16, 2026
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2 participants