Re: [Babel-users] Babel MAC auth fails due to packet reordering

2022-05-05 Thread Daniel Gröber 
Hi Toke,

On Thu, May 05, 2022 at 07:14:24PM +0200, Toke Høiland-Jørgensen wrote:
> Could you please try turning off power saving on the client device and
> see if that makes the problem go away? 'iw dev wlan0 set power_save off'
> should do the trick. You'll also need to make sure no other devices are
> connected to the AP while you're testing (or that they also all have
> power save disabled).

Yup, that did the trick. If I kick all the smartphones off my network (and
disable power-save on the babel peer) the problem goes away but comes back
as soon as I reconnect one.

I was wondering why you wanted me to remove all clients but I think I get
it: ordinarily the power save packet buffering would only affect one client
but since we're talking about multicast here the AP (apparently) buffers
those packets if _any_ client is requesting power save.

--Daniel

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[Babel-users] ANNOUNCE: babeld-1.12

2022-05-05 Thread Juliusz Chroboczek 
Dear all,

Babeld 1.12 is available from

  https://www.irif.fr/~jch/software/files/babeld-1.12.tar.gz
  https://www.irif.fr/~jch/software/files/babeld-1.12.tar.gz.asc

For more information about the Babel routing protocol, please see

  https://www.irif.fr/~jch/software/babel/

This version implements v4-via-v6 routing, which allows an IPv6-only
router to route IPv4 completely transparently.  The work is due to
Théophile Bastian, Toke Høyland-Jørgensen, and myself.  The protocol is
described in RFC 9229, which has not been published yet; in the meantime,
you may find the final draft at

  https://datatracker.ietf.org/doc/html/draft-ietf-babel-v4viav6-08

V4-via-v6 is enabled by default on Linux kernel 5.13 and later, which may
cause issues in your network:

  - IPv6-only routers will suddently start routing IPv4; if you rely on
IPv6-only routers to isolate you from the IPv4 Internet, this will no
longer work.  Please set up filtering rules and firewalls if you wish
to be isolated from the Internet.

  - IPv6-only routers will suddenly start sending ICMPv4 messages using
the IPv4 "dummy address" 192.0.0.8; please make sure your firewall
rules let through ICMPv4 packets with source equal to 192.0.0.8 lest
you suffer from PMTUD blackholes.  (This applies even if you're not
running Babel itself: filtering ICMPv4 packet-too-big is almost always
a mistake.)

The full changelog follows.

5 May 2022: babeld-1.12

  * Implement v4-via-v6 routing (RFC 9229), which allows a router with
IPv4 addresses only to route IPv4.  Thanks to Théophile Bastian.
  * Enable extended Netlink acks when available.
Thanks to Toke Høyland-Jørgensen.
  * Fix restoring of interface configuration to avoid unbounded memory
consumption.  Thanks to andrew-hoff.
  * Fix handling of deny filters in the install chain.

-- Juliusz


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