Commit graph

56 commits

Author SHA1 Message Date
Ondrej Zajicek (work)
0f67366601 Babel: Do not keep an infeasible route as selected
When a route becomes infeasible it should not be kept as selected; this
is forbidden by section 3.6 of the RFC and prevents subsequent updates
from the same router ID from replacing it.

Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>
2016-07-19 14:28:53 +02:00
Ondrej Zajicek (work)
5d6ca22085 Babel: Send wildcard retractions on shutdown and startup
This makes BIRD send a wildcard retraction on all interfaces before
shutting down and right after starting up. This helps ensure that
neighbours will discard the announced routes as soon as possible,
rather than only after the normal timeout procedures.

Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>
2016-07-19 14:23:41 +02:00
Ondrej Zajicek (work)
ecae2f43f3 Babel: Rework handling of retractions
An update with wildcard AE and infinite metric should be treated as a
global retraction of all prefixes announced by that neighbour, per
section 4.4.9 of the RFC. In addition, router ID and seqno in retraction
updates should be ignored. This reworks the handling of retractions and
adjusts the parser to handle all this correctly.

Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>
2016-07-19 13:33:02 +02:00
Ondrej Zajicek (work)
321ff8c404 Babel: Make sure intervals do not overflow
Intervals are carried as 16-bit centisecond values, but kept internally
in 16-bit second values, which causes a potential for overflow. This adds
some checks to make sure this does not happen.

Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>
2016-07-19 11:57:20 +02:00
Pavel Tvrdik
8e433d6a52 Prog Doc: Complete several missing parameters 2016-05-12 15:49:44 +02:00
Ondrej Zajicek (work)
937e75d8f1 Add the Babel routing protocol (RFC 6126)
This patch implements the IPv6 subset of the Babel routing protocol.
Based on the patch from Toke Hoiland-Jorgensen, with some heavy
modifications and bugfixes.

Thanks to Toke Hoiland-Jorgensen for the original patch.
2016-04-28 18:01:40 +02:00