This package adds filters to limit the amount of ARP Requests
devices are allowed to send into the mesh. The limits are 6 packets
per minute per client device, by MAC address, and 1 per second per
node in total.
A burst of up to 50 ARP Requests is allowed until the rate-limiting
takes effect (see --limit-burst in the ebtables manpage).
Furthermore, ARP Requests with a target IP already present in the
batman-adv DAT Cache are excluded from the rate-limiting,
both regarding counting and filtering, as batman-adv will respond
locally with no burden for the mesh. Therefore, this limiter
should not affect popular target IPs, like gateways.
However it should mitigate the problem of curious people or
smart devices scanning the whole IP range. Which could create
a significant amount of overhead for all participants so far.
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
This enables the ebtables internal locking mechanism which
will avoid race conditions between multiple, concurrent
ebtables calls.
This is a preparation for the upcoming gluon-arp-limiter
daemon, to avoid issues if upon restarting gluon-ebtables
the gluon-arp-limiter daemon tries to modify the tables.
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Interacting with batman-adv's genl interface requires some code and
definitions which could be shared between different packages. libbatadv is
trying to do this without providing any guarantee for ABI or API stability.
It is only useful in very controlled environments like gluon.
Signed-off-by: Sven Eckelmann <sven@narfation.org>
* gluon-core, gluon-client-bridge: introduce new firewall zone: local_client
* gluon-core: put clients in local_client zone, introduce drop-zone,
set dns-rules and zones
* gluon-respondd: allow respondd on mesh
* gluon-status-page-api: allow http input on mesh and client
Filtering by MAC address won't filter out multicast packages like router
solicitations, causing uradvd to send out router advertisements with
maximum frequency (every 3 seconds) in active meshes, even when no local
client is actually interested in the advertisements.
Fixes#1230
The new gluon.site lua library will eventually replace gluon.site_config
(which is hereby deprecated, but will continue to be supported for a
while).
The new gluon.site library will wrap all values to allow traversing
non-existing tables without errors.
site = require 'gluon.site'
c = site.a.b.c -- doesn't fail even if a or a.b don't exist
The wrapped values must be unwrapped using call syntax:
site_name = site.site_name()
Using the call syntax on a non-existing value will return nil. An
alternative default value may be passed instead:
mac = site.next_node.mac('16:41:95:40:f7:dc')
