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%?}"
  30         intf="${intf%phys}"
  31         intf="${intf^^}"
  32
  33         local zone
  34         for zone in GREEN BLUE ORANGE RED; do
  35                 # Try to find if INTERFACE is the *phys version of a zone
  36                 if [ "${intf}" = "${zone}" ]; then
  37                         echo "${zone}"
  38                         return 0
  39                 fi
  40
  41                 # Try to find out if this INTERFACE is a slave of a zone
  42                 local slave
  43                 for slave in $(get_value "${zone}_SLAVES"); do
  44
  45                         #Compare if the mac address matches or if the name matches
  46                         if ([ "$(</sys/class/net/${INTERFACE}/address)" = "${slave}" ] || [ "${INTERFACE}" = "${slave}" ]); then
  47                                 echo "${zone}"
  48                                 return 0
  49                         fi
  50                 done
  51         done
  52
  53         return 1
  54 }
  55
  56 get_value() {
  57         echo "${!1}"
  58 }
  59
  60 random_mac_address() {
  61         local address="02"
  62
  63         for i in $(seq 5); do
  64                 printf -v address "${address}:%02x" "$(( RANDOM % 256 ))"
  65         done
  66
  67         echo "${address}"
  68 }
  69
  70 # Try to detect which zone we are operating on
  71 ZONE=$(detect_zone)
  72
  73 # Cannot proceed if we could not find a zone
  74 if [ -z "${ZONE}" ]; then
  75         exit 0
  76 fi
  77
  78 # Determine the mode of this zone
  79 MODE="$(get_value "${ZONE}_MODE")"
  80
  81 # The name of the virtual bridge
  82 BRIDGE="$(get_value "${ZONE}_DEV")"
  83
  84 case "${MODE}" in
  85         bridge)
  86                 ADDRESS="$(get_value "${ZONE}_MACADDR")"
  87                 [ -n "${ADDRESS}" ] || ADDRESS="$(random_mac_address)"
  88
  89                 # We need to create the bridge if it doesn't exist, yet
  90                 if [ ! -d "/sys/class/net/${BRIDGE}" ]; then
  91                         ip link add "${BRIDGE}" address "${ADDRESS}" type bridge
  92                         #ip link set "${BRIDGE}" up
  93                 fi
  94
  95                 # Attach the physical device
  96                 ip link set dev "${INTERFACE}" master "${BRIDGE}"
  97                 ip link set dev "${INTERFACE}" up
  98                 ;;
  99
 100         macvtap)
 101                 ADDRESS="$(</sys/class/net/${INTERFACE}/address)"
 102                 GENERATED_ADDRESS=$(random_mac_address)
 103
 104                 ip link add link "${INTERFACE}" "${BRIDGE}" address "${ADDRESS}" type macvlan mode bridge
 105                 ip link set "${INTERFACE}" address "${GENERATED_ADDRESS}"
 106                 ip link set "${INTERFACE}" up
 107                 ;;
 108
 109         "")
 110                 exit 0
 111                 ;;
 112
 113         *)
 114                 logger -t "network" "Unhandled mode '${MODE}' for '${ZONE}' (${INTERFACE})"
 115                 exit 1
 116                 ;;
 117 esac