config/udev/network-hotplug-bridges

   1 #!/bin/bash
   2 ############################################################################
   3 #                                                                          #
   4 # This file is part of the IPFire Firewall.                                #
   5 #                                                                          #
   6 # IPFire is free software; you can redistribute it and/or modify           #
   7 # it under the terms of the GNU General Public License as published by     #
   8 # the Free Software Foundation; either version 2 of the License, or        #
   9 # (at your option) any later version.                                      #
  10 #                                                                          #
  11 # IPFire is distributed in the hope that it will be useful,                #
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of           #
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the            #
  14 # GNU General Public License for more details.                             #
  15 #                                                                          #
  16 # You should have received a copy of the GNU General Public License        #
  17 # along with IPFire; if not, write to the Free Software                    #
  18 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA #
  19 #                                                                          #
  20 # Copyright (C) 2016 IPFire Team <info@ipfire.org>                         #
  21 #                                                                          #
  22 ############################################################################
  23
  24 [ -n "${INTERFACE}" ] || exit 2
  25
  26 eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
  27
  28 detect_zone() {
  29         local intf="${INTERFACE%0*}"
  30         intf="${intf^^}"
  31
  32         local zone
  33         for zone in GREEN BLUE ORANGE RED; do
  34                 # Try to find if INTERFACE is the *phys version of a zone
  35                 if [ "${intf}" = "${zone}" ]; then
  36                         echo "${zone}"
  37                         return 0
  38                 fi
  39
  40                 # Try to find out if this INTERFACE is a slave of a zone
  41                 local slave
  42                 for slave in $(get_value "${zone}_SLAVES"); do
  43                         if [ "${INTERFACE}" = "${slave}" ]; then
  44                                 echo "${zone}"
  45                                 return 0
  46                         fi
  47                 done
  48         done
  49
  50         return 1
  51 }
  52
  53 get_value() {
  54         echo "${!1}"
  55 }
  56
  57 random_mac_address() {
  58         local address="02"
  59
  60         for i in $(seq 5); do
  61                 printf -v address "${address}:%02x" "$(( RANDOM % 256 ))"
  62         done
  63
  64         echo "${address}"
  65 }
  66
  67 # Try to detect which zone we are operating on
  68 ZONE=$(detect_zone)
  69
  70 # Cannot proceed if we could not find a zone
  71 if [ -z "${ZONE}" ]; then
  72         exit 0
  73 fi
  74
  75 # Determine the mode of this zone
  76 MODE="$(get_value "${ZONE}_MODE")"
  77
  78 # The name of the virtual bridge
  79 BRIDGE="$(get_value "${ZONE}_DEV")"
  80
  81 case "${MODE}" in
  82         bridge)
  83                 ADDRESS="$(get_value "${ZONE}_MACADDR")"
  84                 [ -n "${ADDRESS}" ] || ADDRESS="$(random_mac_address)"
  85
  86                 # We need to create the bridge if it doesn't exist, yet
  87                 if [ ! -d "/sys/class/net/${BRIDGE}" ]; then
  88                         ip link add "${BRIDGE}" address "${ADDRESS}" type bridge
  89                         #ip link set "${BRIDGE}" up
  90                 fi
  91
  92                 # Attach the physical device
  93                 ip link set dev "${INTERFACE}" master "${BRIDGE}"
  94                 ip link set dev "${INTERFACE}" up
  95                 ;;
  96
  97         macvtap)
  98                 ADDRESS="$(</sys/class/net/${INTERFACE}/address)"
  99                 GENERATED_ADDRESS=$(random_mac_address)
 100
 101                 ip link add link "${INTERFACE}" "${BRIDGE}" address "${ADDRESS}" type macvlan mode bridge
 102                 ip link set "${INTERFACE}" address "${GENERATED_ADDRESS}"
 103                 ip link set "${INTERFACE}" up
 104                 ;;
 105
 106         "")
 107                 exit 0
 108                 ;;
 109
 110         *)
 111                 logger -t "network" "Unhandled mode '${MODE}' for '${ZONE}' (${INTERFACE})"
 112                 exit 1
 113                 ;;
 114 esac