Annotation of embedaddon/dnsmasq/contrib/wrt/lease_update.sh, revision 1.1
1.1 ! misho 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:
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