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

# $1 = interface
# $2 = circuit name
# $3 = network prefix
# $4 = valid lifetime
# $5 = preferred lifetime

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

script_name="prefixv6-up"
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=$3
valid_lft=${4:-forever}
preferred_lft=${5:-forever}

{
fork_call_handlers
sync_lock_resource prefixv6updown-$circ_id "$script"

# register prefix but check if prefix is new or if it has been updated only
curprefixes=$(circuit_get_prefixes $circ_id ipv6 | cut -d' ' -f1)
if echo "$curprefixes" | grep -q "^$prefix$"
then
    newprefix=
    echo "$circ_id[$interface]: IPv6 prefix $prefix has been renewed"
else
    newprefix=1
    echo "$circ_id[$interface]: IPv6 prefix $prefix has appeared"
fi

circuit_register_prefix $circ_id ipv6 $prefix $valid_lft $preferred_lft

if [ -n "$newprefix" ]
then
    ip -6 route add unreachable $prefix
    setup-dynamic-ip6tables.sh

    if [ -z "$curprefixes" ]
    then
        # now the circuit is (at least semi)online
        circuit_go_online_if_possible $circ_id ipv6
    fi
fi

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

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