local address announcements

[Daniel Schall]

> > My algorithm is able to sign multicast packets only if a key exchange 
> > has occurred before.
> > (key exchange happens when you first contact the other node.) 
> > Therefore, if you ping the nodes once (over the tinc interface), the 
> > keys should get exchanged and multicast signing should work.
> > Yes, this is an issue that could easily be improved.
> > Anyway, the code is still beta, it works most of the time, but I 
> > experience some strange behavior too.
> > Sometimes, nodes do not see each other, but I did not yet find out, why.
>
> Tried it a couple of times and it seems it doesn't work.
> I verified that both systems see each others broadcasts.
> Furthermore I pinged both from within each other on their tinc address.
> Didn't help.

In the meantime, I added a key-request, in case the key is not yet
exchanged.

Besides that, I am experiencing the same behavior:
My two nodes exchange their local addresses, but packets sent over the tinc
interface get lost between the two.
I did not find out, why this is happening, but I am on it.