1 #!/bin/sh 2 3 # Copyright (c) 2006 Simon Kelley 4 # 5 # This program is free software; you can redistribute it and/or modify 6 # it under the terms of the GNU General Public License as published by 7 # the Free Software Foundation; version 2 dated June, 1991. 8 # 9 # This program is distributed in the hope that it will be useful, 10 # but WITHOUT ANY WARRANTY; without even the implied warranty of 11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 # GNU General Public License for more details. 13 14 15 # if $1 is add del or old, this is a dnsmasq-called lease-change 16 # script, update the nvram database. if $1 is init, emit a 17 # dnsmasq-format lease file to stdout representing the current state of the 18 # database, this is called by dnsmasq at startup. 19 20 NVRAM=/usr/sbin/nvram 21 PREFIX=dnsmasq_lease_ 22 23 # Arguments. 24 # $1 is action (add, del, old) 25 # $2 is MAC 26 # $3 is address 27 # $4 is hostname (optional, may be unset) 28 29 # env. 30 # DNSMASQ_LEASE_LENGTH or DNSMASQ_LEASE_EXPIRES (which depends on HAVE_BROKEN_RTC) 31 # DNSMASQ_CLIENT_ID (optional, may be unset) 32 33 # File. 34 # length|expires MAC addr hostname|* CLID|* 35 36 # Primary key is address. 37 38 if [ ${1} = init ] ; then 39 ${NVRAM} show | sed -n -e "/^${PREFIX}.*/ s/^.*=//p" 40 else 41 if [ ${1} = del ] ; then 42 ${NVRAM} unset ${PREFIX}${3} 43 fi 44 45 if [ ${1} = old ] || [ ${1} = add ] ; then 46 ${NVRAM} set ${PREFIX}${3}="${DNSMASQ_LEASE_LENGTH:-}${DNSMASQ_LEASE_EXPIRES:-} ${2} ${3} ${4:-*} ${DNSMASQ_CLIENT_ID:-*}" 47 fi 48 ${NVRAM} commit 49 fi 50 51 52 53 54 55
