diff options
Diffstat (limited to 'contrib/wrt/lease_update.sh')
-rwxr-xr-x | contrib/wrt/lease_update.sh | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/contrib/wrt/lease_update.sh b/contrib/wrt/lease_update.sh new file mode 100755 index 0000000..46509b3 --- /dev/null +++ b/contrib/wrt/lease_update.sh @@ -0,0 +1,54 @@ +#!/bin/sh + +# Copyright (c) 2006 Simon Kelley +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; version 2 dated June, 1991. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. + + +# if $1 is add del or old, this is a dnsmasq-called lease-change +# script, update the nvram database. if $1 is init, emit a +# dnsmasq-format lease file to stdout representing the current state of the +# database, this is called by dnsmasq at startup. + +NVRAM=/usr/sbin/nvram +PREFIX=dnsmasq_lease_ + +# Arguments. +# $1 is action (add, del, old) +# $2 is MAC +# $3 is address +# $4 is hostname (optional, may be unset) + +# env. +# DNSMASQ_LEASE_LENGTH or DNSMASQ_LEASE_EXPIRES (which depends on HAVE_BROKEN_RTC) +# DNSMASQ_CLIENT_ID (optional, may be unset) + +# File. +# length|expires MAC addr hostname|* CLID|* + +# Primary key is address. + +if [ ${1} = init ] ; then + ${NVRAM} show | sed -n -e "/^${PREFIX}.*/ s/^.*=//p" +else + if [ ${1} = del ] ; then + ${NVRAM} unset ${PREFIX}${3} + fi + + if [ ${1} = old ] || [ ${1} = add ] ; then + ${NVRAM} set ${PREFIX}${3}="${DNSMASQ_LEASE_LENGTH:-}${DNSMASQ_LEASE_EXPIRES:-} ${2} ${3} ${4:-*} ${DNSMASQ_CLIENT_ID:-*}" + fi + ${NVRAM} commit +fi + + + + + |