[olsr-dev] bug in mdi code

[Daniel Poelzleithner]

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Hi,

I found a bug in the mdi code. If you have a ethernet bridge on two
nodes both with extra ip's for the lan connection, and one node changes
its main wifi ip. olsrd gets confused, using the old mdi entry to route
to the old target, ignoring that the new target uses the same mdi entry.
This also happens if you move the mdi ip from one node to another, or by
accident have a duplicated ip. The mdi test code seems not to check if
the anncounced mdi is actually the same, but only if he already has the
entry in general, causing terrible, hard to find routing errors.

kindly regards
  Daniel
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