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board/common: simplify avahi-autoipd.action script

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- We know we always have iproute2 tools
 - We only use one ipv4ll client per interface, so UNBIND can be
   simplified to flush ifname:avahi
 - Log all events handled by script for troubleshooting

Note: on BIND event we may be called without first getting UNBIND on
      previous address, hence the flush there too.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
This commit is contained in:
Joachim Wiberg
2024-09-26 15:49:45 +02:00
parent af1a86f10a
commit 4ed4fa5052
1 changed files with 22 additions and 68 deletions
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board/common/rootfs/etc/avahi/avahi-autoipd.action
+22 -68
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@@ -1,24 +1,4 @@
#!/bin/sh
# This file is part of avahi.
#
# avahi is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation; either version 2 of the
# License, or (at your option) any later version.
#
# avahi is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
# License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with avahi; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
# USA.
set -e
# Command line arguments:
# $1 event that happened:
# BIND: Successfully claimed address
@@ -30,59 +10,33 @@ set -e
PATH="$PATH:/usr/bin:/usr/sbin:/bin:/sbin"
log()
{
logger -I $$ -t zeroconf -p user.notice "$*"
}
# Use a different metric for each interface, so that we can set
# identical routes to multiple interfaces.
METRIC=$((1000 + `cat "/sys/class/net/$2/ifindex" 2>/dev/null || echo 0`))
if [ -x /bin/ip -o -x /sbin/ip ] ; then
case "$1" in
BIND)
ip addr flush dev "$2" label "$2:avahi"
ip addr add "$3"/16 brd 169.254.255.255 label "$2:avahi" scope link dev "$2" proto random
ip route add default dev "$2" metric "$METRIC" scope link proto zeroconf
log "set ipv4ll $3 on iface $2"
;;
# We have the Linux ip tool from the iproute package
CONFLICT|UNBIND|STOP)
ip route del default dev "$2" metric "$METRIC" scope link
ip addr flush dev "$2" label "$2:avahi"
log "clr ipv4ll on iface $2"
;;
case "$1" in
BIND)
ip addr flush dev "$2" label "$2:avahi"
ip addr add "$3"/16 brd 169.254.255.255 label "$2:avahi" scope link dev "$2" proto 6
ip route add default dev "$2" metric "$METRIC" scope link proto zeroconf ||:
;;
CONFLICT|UNBIND|STOP)
ip route del default dev "$2" metric "$METRIC" scope link ||:
ip addr del "$3"/16 brd 169.254.255.255 label "$2:avahi" scope link dev "$2"
;;
*)
echo "Unknown event $1" >&2
exit 1
;;
esac
elif [ -x /bin/ifconfig -o -x /sbin/ifconfig ] ; then
# We have the old ifconfig tool
case "$1" in
BIND)
ifconfig "$2:avahi" inet "$3" netmask 255.255.0.0 broadcast 169.254.255.255 up
route add default dev "$2:avahi" metric "$METRIC" ||:
;;
CONFLICT|STOP|UNBIND)
route del default dev "$2:avahi" metric "$METRIC" ||:
ifconfig "$2:avahi" down
;;
*)
echo "Unknown event $1" >&2
exit 1
;;
esac
else
echo "No network configuration tool found." >&2
exit 1
fi
*)
log "Unknown event $1 on iface $2"
exit 1
;;
esac
exit 0