functions.ipv4

   1 #!/bin/bash
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2010  Michael Tremer & Christian Schmidt                      #
   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 IP_SUPPORTED_PROTOCOLS="${IP_SUPPORTED_PROTOCOLS} ipv4"
  23
  24 function ipv4_is_valid() {
  25         ipcalc --ipv4 -c $@ >/dev/null 2>&1
  26
  27         case "$?" in
  28                 0)
  29                         return ${EXIT_OK}
  30                         ;;
  31                 *)
  32                         return ${EXIT_ERROR}
  33                         ;;
  34         esac
  35 }
  36
  37 function ipv4_detect_duplicate() {
  38         local device=${1}
  39         local address=${2}
  40
  41         assert isset address
  42         assert isset device
  43         assert device_exists ${device}
  44
  45         if ! arping -q -c 2 -w 3 -D -I ${device} ${address}; then
  46                 log DEBUG "Detected duplicate address '${address}' on device '${device}'."
  47                 return ${EXIT_OK}
  48         fi
  49
  50         return ${EXIT_ERROR}
  51 }
  52
  53 function ipv4_update_neighbours() {
  54         local device=${1}
  55         local address=${2}
  56
  57         arping -q -A -c 1 -I ${device} ${address}
  58         ( sleep 2; arping -q -U -c 1 -I ${device} ${address} ) >/dev/null 2>&1 </dev/null &
  59 }
  60
  61 function ipv4_get_netaddress() {
  62         local address=${1}
  63         assert isset address
  64
  65         local prefix=$(ip_get_prefix ${address})
  66         assert isset prefix
  67
  68         local NETWORK
  69         eval $(ipcalc --network ${address})
  70         assert isset NETWORK
  71
  72         echo "${NETWORK}/${prefix}"
  73
  74         return ${EXIT_OK}
  75 }