#!/bin/sh
#----------------------------------------------------------------------------
# /etc/ppp/ipv6-down - called whenever a (i)ppp connection has been come down
#
# Creation:        26.09.2009  zone42
# Last Update:     $Id$
#----------------------------------------------------------------------------
export PATH=/usr/local/sbin:/usr/sbin:/sbin:/usr/local/bin:/usr/bin:/bin

real_interface=$1
interface=$1
tty=$2
speed=$3
local=$4
remote=$5
lock_file=/var/lock/pppd.ipv6.$interface

run_ipv6_down ()
{
    case $interface in
    ppp0)           # it's DSL, map interface
        case $tty in
        "" | eth*| br* | /dev/ttyp0 | /dev/ttyS[0-4] | /dev/ttyUSB0 | /dev/capi/0 | /dev/ttyACM0 )
            # empty: PPPoE, eth[0-9] in_kernel, else PPTP
            interface=pppoe
#            rm -f /var/run/pppoe.up

#            if [ -f /var/run/imond.pid ]
#            then
#                /usr/local/bin/imond-stat "pppoe: down"
#            fi
        ;;
        esac
    ;;
    esac

    rm -f /var/run/$interface.ipv6

    # default route existing or last default route interface going down?
    if [ -f /etc/default-ipv6-route-interface ]
    then
        read default_route_interface def_gateway < /etc/default-ipv6-route-interface
    elif [ -f /etc/last-default-ipv6-route-interface ]
    then
        read default_route_interface def_gateway < /etc/last-default-ipv6-route-interface
        rm -f /etc/last-default-ipv6-route-interface
    else
        default_route_interface=`ip -f inet6 route show | grep '^default' | sed 's/^default.*dev //g'`

        case $default_route_interface in
            ppp0) default_route_interface=pppoe ;;
        esac
    fi

    if [ "$default_route_interface" = "$interface" ]
    then
    	logger -t "ipv6-down[$$]" "default interface '$interface' goes down"
        rm -f /var/run/online.ipv6
        is_default_route='yes'
    else
        is_default_route='no'
    fi

    # Call all custom ipv6-downs
    for j in /etc/ppp/ipv6-down[0-9][0-9][0-9].*
    do
        if [ -f $j ]
        then
	     logger -t "ipv6-down[$$]" "executing $j"
             . $j
        fi
    done
}

# Wait for other ip-up/ipv6-down instances
while [ -f $lock_file ]
do
      sleep 3
done
> $lock_file


if [ -f /var/run/syslogd.pid ]		# Log to syslog if available...
then
    run_ipv6_down > /tmp/ipv6-down.$$ 2>&1
    sed -e "s/`echo -e '\033'`\[[0-9]\+m//g" /tmp/ipv6-down.$$ | logger -t ipv6-down
    rm -f /tmp/ipv6-down.$$
else
    run_ipv6_down >/dev/console 2>&1
fi

rm -f $lock_file

exit 0