scripts/get_dhcp_lease.sh

   1 #!/bin/bash
   2 ##
   3 # Copyright 2016 Telefónica Investigación y Desarrollo, S.A.U.
   4 # This file is part of openvim
   5 # All Rights Reserved.
   6 #
   7 # Licensed under the Apache License, Version 2.0 (the "License"); you may
   8 # not use this file except in compliance with the License. You may obtain
   9 # a copy of the License at
  10 #
  11 #         http://www.apache.org/licenses/LICENSE-2.0
  12 #
  13 # Unless required by applicable law or agreed to in writing, software
  14 # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  15 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  16 # License for the specific language governing permissions and limitations
  17 # under the License.
  18 #
  19 # For those usages not covered by the Apache License, Version 2.0 please
  20 # contact with: nfvlabs@tid.es
  21 ##
  22
  23 if [ -e /var/lib/dhcp/dhcpd.leases ]
  24 then
  25         awk '
  26         ($1=="lease" && $3=="{"){ lease=$2; active="no"; found="no" }
  27         ($1=="binding" && $2=="state" && $3=="active;"){ active="yes" }
  28         ($1=="hardware" && $2=="ethernet" && $3==tolower("'$1';")){ found="yes" }
  29         ($1=="client-hostname"){ name=$2 }
  30         ($1=="}"){ if (active=="yes" && found=="yes"){ target_lease=lease; target_name=name}}
  31         END{printf("%s", target_lease)} #print target_name
  32         ' /var/lib/dhcp/dhcpd.leases
  33 elif [ -e /var/lib/lxd-bridge/dnsmasq.lxdbr0.leases ]
  34 then
  35         awk '
  36         ($2=="'$1'"){ lease=$3; name=$4}
  37         END{printf("%s", lease)}
  38         ' /var/lib/lxd-bridge/dnsmasq.lxdbr0.leases
  39 fi