net80211/michael_mic problem with weird mbuf layout

[Matthias Drochner <M.Drochner%fz-juelich.de@localhost>]

Hi -

I just encountered a problem with a packet fed to tkip_enmic()
consisting of 7 mbufs with lengths
32+52+817+200+200+200+1 (which sums up to 1502).
The current logic can't handle this. TKIP has been stable for
me for a long time -- something must have changed in NetBSD's
IP stack.
What now -- can these odd numbers be avoided or do we need to
make michael_mic() more general (which would need a temporary
buffer and additional checks and copies)?

best regards
Matthias



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