config/udev/network-hotplug-rename

   1 #!/bin/bash
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2015  IPFire Team  <info@ipfire.org>                          #
   6 #                                                                             #
   7 # This program is free software: you can redistribute it and/or modify        #
   8 # it under the terms of the GNU General Public License as published by        #
   9 # the Free Software Foundation, either version 3 of the License, or           #
  10 # (at your option) any later version.                                         #
  11 #                                                                             #
  12 # This program is distributed in the hope that it will be useful,             #
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  15 # GNU General Public License for more details.                                #
  16 #                                                                             #
  17 # You should have received a copy of the GNU General Public License           #
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  19 #                                                                             #
  20 ###############################################################################
  21
  22 # Check if all appropriate variables are set
  23 [ -n "${INTERFACE}" ] || exit 2
  24
  25 # Ignore virtual interfaces, etc.
  26 case "${INTERFACE}" in
  27         lo)
  28                 exit 0
  29                 ;;
  30         tun*)
  31                 exit 0
  32                 ;;
  33         ppp*)
  34                 exit 0
  35                 ;;
  36 esac
  37
  38 # Check if INTERFACE actually exists
  39 [ -d "/sys/class/net/${INTERFACE}" ] || exit 1
  40
  41 # If the network configuration is not readable,
  42 # we cannot go on.
  43 if [ ! -r "/var/ipfire/ethernet/settings" ]; then
  44         exit 1
  45 fi
  46
  47 # Read network settings
  48 eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
  49
  50 # Standard zones
  51 ZONES="RED GREEN ORANGE BLUE"
  52
  53 # Determine the address of INTERFACE
  54 ADDRESS="$(</sys/class/net/${INTERFACE}/address)"
  55
  56 # Walk through all zones and find the matching interface
  57 for zone in ${ZONES}; do
  58         address="${zone}_MACADDR"
  59         device="${zone}_DEV"
  60
  61         # Skip if address or device is unset
  62         [ -n "${!address}" -a -n "${!device}" ] || continue
  63
  64         # If a matching interface has been found we will
  65         # print the name to which udev will rename it.
  66         if [ "${ADDRESS}" = "${!address}" ]; then
  67                 echo "${!device}"
  68                 exit 0
  69         fi
  70 done
  71
  72 # If we get here we have not found a matching device,
  73 # but we won't return an error any way. The new device
  74 # will remain with the previous name.
  75 exit 0