ra: add workarounds for missbehaving 3GPP modules

openwrt / odhcp6c

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ra: add workarounds for missbehaving 3GPP modules #70

Closed alinnastac closed 2 years ago

alinnastac commented 2 years ago

Some 3GPP modules are not implementing IPv6 ND RFCs correctly:

periodic RAs are not sent
RAs that are supposed to perform prefix renumbering do not take the old prefix into account, which result in odhcp6c building longer and longer STATE_RA_PREFIX arrays

"-3" command line parameter enable following workarounds:

RS is send 12 seconds before default route is removed
STATERA* status is flushed before RA is processed

Signed-off-by: Alin Nastac alin.nastac@gmail.com

dedeckeh commented 2 years ago

As these changes are hacks for misbehaving 3GPP modules and since I'm not (yet) aware of any 3GPP modules used in the OpenWrt community behaving in such way I'm not going to merge this PR.