isisd: do not add >63 IP addresses to hello

RFC1195 s4.2 "Multiple IP Addresses per Interface" explicitly forbids us
from adding multiple tuples of IP addresses, putting a hard cutoff at 63
IP addresses.

* isisd/isis_tlv.c: cut off (and return success) at 63 addrs.

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
Tested-by: Martin Winter <mwinter@opensourcerouting.org>
1 file changed