#!/bin/sh
#----------------------------------------------------------------------------
# /etc/ppp/prefixv6-down
# called whenever an IPv6 network prefix disappears
#
# Last Update:     $Id$
#----------------------------------------------------------------------------

# $1 = interface
# $2 = circuit name
# $3 = network prefix

. /etc/boot.d/forking.inc
. /etc/boot.d/lazy.inc
. /etc/boot.d/locking.inc
. /etc/boot.d/networking.inc

script_name="prefixv6-down"
script="$script_name[$$]"
facility=$circuit_logfacility
logmsgprio=$facility.notice
. /usr/share/logfunc.sh

export PATH=/usr/local/sbin:/usr/sbin:/sbin:/usr/local/bin:/usr/bin:/bin

interface=$1
circ_id=$2
prefix=$3

{
fork_call_handlers
sync_lock_resource prefixv6updown-$circ_id "$script"

echo "$circ_id[$interface]: IPv6 prefix $prefix has disappeared"

ip -6 route del unreachable $prefix
circuit_deregister_prefix $circ_id ipv6 $prefix
setup-dynamic-ip6tables.sh

# Call all custom prefixv6-downs
lazy_begin
for j in /etc/ppp/prefixv6-down[0-9][0-9][0-9].*
do
    if [ -f $j ]
    then
        echo "executing $j"
        . $j
    fi
done
lazy_end

curprefixes=$(circuit_get_prefixes $circ_id ipv6)
if [ -z "$curprefixes" ]
then
    # now the circuit is at most semionline
    circuit_go_offline_if_necessary $circ_id ipv6
fi

sync_unlock_resource prefixv6updown-$circ_id "$script"
} 2>&1 | logmsg "$script" $logmsgprio