[FS#3600] [odhcp6c] prefix exclude sanity check fails for prefix length > 64 (Attachment added)
openwrt-bugs at lists.openwrt.org
Thu Jan 28 14:24:18 EST 2021
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User who did this - oofnikj (oofnikj)
Attached to Project - OpenWrt/LEDE Project
Summary - [odhcp6c] prefix exclude sanity check fails for prefix length > 64
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To -
Operating System - All
Severity - Medium
Priority - Very Low
Reported Version - openwrt-19.07
Due in Version - Undecided
Due Date - Undecided
Details - odhcp6c fails to request a delegated prefix when the server returns an excluded prefix of length > 64.
According to [[https://tools.ietf.org/html/rfc6603#section-4.2|RFC 6603]]:
> o prefix-len: The length of the excluded prefix in bits. The
prefix-len MUST be between 'OPTION_IAPREFIX prefix-length'+1 and
However, values for excluded prefix length > 64 fail sanity, resulting in odhcp6c dropping the PD from the request.
The following patch fixes the issue.
One or more files have been attached.
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