#!/bin/sh
#----------------------------------------------------------------------------
# /etc/ppp/ip-down - called whenever a circuit connection goes offline
#
# Input:
#   $1 = network interface
#   $2 = TTY device (mostly useless, often set to /dev/null if there is no TTY)
#   $3 = TTY speed (may be empty, see above)
#   $4 = local IPv4 address (optionally with subnet mask in CIDR notation)
#   $5 = remote IPv4 address (if this is a point-to-point connection)
#   $6 = circuit identifier
#   $7 = if non-empty, we are called from within addr-down
#
# Creation:        29.03.2000  fm
# Last Update:     $Id$
#----------------------------------------------------------------------------

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

run_ip_down ()
{
    circuit_lock ipv4updown-$circ_id "$script"

    echo "circuit $circ_id[$interface] goes down"
    [ -n "$local" ] && echo "$circ_id: local IPv4 address: $local"
    [ -n "$remote" ] && echo "$circ_id: remote IPv4 address: $remote"

    local is_default_route=no i=
    for i in $(seq 1 $circ_nets_ipv4_n)
    do
        eval local net=\$circ_nets_ipv4_$i
        if [ "$net" = "0.0.0.0/0" ]
        then
            is_default_route=yes
            break
        fi
    done

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

    circuit_lock $circ_id "$script"
    circuit_remove_routes $circ_id 4
    setup-dynamic-iptables.sh

    for i in $(seq 1 $circ_nets_ipv4_n)
    do
        eval local net=\$circ_nets_ipv4_$i
        circuit_deregister_routed_network $circ_id ipv4 $net
        [ -f /var/run/imond.pid ] && imond-stat "$circ_id down $net"
    done

    # now the circuit is at most semionline
    circuit_go_offline_if_necessary $circ_id ipv4

    circuit_unlock $circ_id "$script"
    circuit_unlock ipv4updown-$circ_id "$script"
}

interface=$1
tty=$2
speed=$3
local=${4:+$(netcalc canonicalize $4)}
remote=$5
circ_id=$6
addrdown=$7

if [ -n "$local" -a -z "$addrdown" ]
then
    /etc/ppp/addr-down $interface $circ_id "$local" 1 &
fi

ip=ip
script_op=down
. /etc/ppp/ip-up-down