#!/bin/sh
#------------------------------------------------------------------------------
# /etc/ppp/ip-up.zdyndns - Update for DynDNS-Providers
# part of Package DYNDNS __FLI4LVER__, see documentation for licence
#
# (c) copyright 2001-2002 Thomas Mueller
# (c) copyright 2002-2004 Tobias Gruetzmacher
#
# Creation:    05.08.2002 tobig
# Last Update: $Id$
#------------------------------------------------------------------------------

update_hosts ()
{
    wait_time=2
    wait_string=`seq 1 $wait_time`

    dyn_lock=/var/run/dyndns/dyndns_ip-up.$$

    circ=$1
    shift

    while [ "$1" ]
    do
        > $dyn_lock
        host=$1
        shift
        echo "Starting update for '$host' on circuit '$circ'"
        nice -10 dyndns-update -s -l $dyn_lock update $host $circ &
        for i in $wait_string
        do
            [ -f $dyn_lock ] || break
            sleep 1
        done
    done
    rm -f $dyn_lock
}

local hosts_that_needs_dyndns_update=
local dyn_hostdir=/etc/dyndns/host.d
for host in $dyn_hostdir/*.conf
do
    . $host
    host=`basename $host|sed -e 's/\.conf$//'`
    echo "Checking dyndns host '$host' for matching circuit '$circ_id'."
    for idx in `seq 1 $circuit_n`
    do
        eval circ='$circuit_'$idx
        dyndns_circ_ids=$(circuit_resolve $circ)
        echo "The circuit '$circ' is mapped to the circuit IDs '$dyndns_circ_ids'."
        found=
        for c in $dyndns_circ_ids
        do
            if [ "$c" = "$circ_id" ]
            then
                echo "Found match for host '$host' with circuit ID '$circ_id', dyndns update will be executed soon."
                hosts_that_needs_dyndns_update="$hosts_that_needs_dyndns_update $host"
                found=1
                break
            fi
        done
        if [ -z "$found" ]
        then
            echo "The host '$host' doesn't belong to the circuit ID '$circ_id', no dyndns update required."
        fi
    done
done

if [ -n "$hosts_that_needs_dyndns_update" ]
then
    echo "Executing dyndns update for hosts: $hosts_that_needs_dyndns_update"
    update_hosts $circ_id $hosts_that_needs_dyndns_update 2>&1 | logmsg ip-up440.dyndns &
fi