[Pkg-utopia-maintainers] Bug#533233: avahi-autoipd should not overwrite route when other interfaces are configured

[Keith Buck]

Package: avahi-autoipd
Version: 0.6.31-5
Followup-For: Bug #533233

I'm experiencing the same issue. A default route with metric 1002 is being
added that is overriding the real default route of my machine's actually-
connected wireless interface. Even if autoconfiguration on other interfaces is
desirable, a metric of 1002 is entirely too low for an auto-configuration
"we're not sure if it'll even work" route.

Here are the routes on my machine, as configured by the default configuration:
default dev eth0  scope link  metric 1002
default via 10.202.100.1 dev wlan0  proto static  metric 1024

Changing the default base metric in the script (like in message #26) fixed it
for me, but it took a while to track this issue down.



-- System Information:
Debian Release: 8.4
  APT prefers stable
  APT policy: (990, 'stable'), (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages avahi-autoipd depends on:
ii  adduser     3.113+nmu3
ii  libc6       2.19-18+deb8u4
ii  libdaemon0  0.14-6

Versions of packages avahi-autoipd recommends:
ii  iproute2         3.16.0-2
ii  isc-dhcp-client  4.3.1-6+deb8u2

avahi-autoipd suggests no packages.

-- Configuration Files:
/etc/avahi/avahi-autoipd.action changed:
set -e
PATH="$PATH:/usr/bin:/usr/sbin:/bin:/sbin"
METRIC=$((1100 + `cat "/sys/class/net/$2/ifindex" 2>/dev/null || echo 0`))
if [ -x /bin/ip -o -x /sbin/ip ] ; then
    # We have the Linux ip tool from the iproute package
    case "$1" in
        BIND)
            ip addr add "$3"/16 brd 169.254.255.255 label "$2:avahi" scope link dev "$2"
            ip route add default dev "$2" metric "$METRIC" scope link ||:
            ;;
        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
exit 0


-- no debconf information