functions.ip-tunnel

   1 #!/bin/bash
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2012  IPFire Network Development Team                         #
   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_TUNNEL_MODES="sit"
  23
  24 function ip_tunnel_add() {
  25         local device=${1}
  26         shift
  27
  28         local mode="sit"
  29         local ttl
  30
  31         local remote_address
  32         local local_address
  33
  34         while [ $# -gt 0 ]; do
  35                 case "${1}" in
  36                         --mode=*)
  37                                 mode=$(cli_get_val ${1})
  38                                 ;;
  39                         --ttl=*)
  40                                 ttl=$(cli_get_val ${1})
  41                                 ;;
  42
  43                         --remote-address=*)
  44                                 remote_address=$(cli_get_val ${1})
  45                                 ;;
  46                         --local-address=*)
  47                                 local_address=$(cli_get_val ${1})
  48                                 ;;
  49                 esac
  50                 shift
  51         done
  52
  53         assert isset mode
  54         assert isoneof mode ${IP_TUNNEL_MODES}
  55
  56         # If TTL is set, make sure it is an integer.
  57         isset ttl && assert isinteger ttl
  58
  59         assert isset remote_address
  60         assert isset local_address
  61
  62         local cmd_args
  63
  64         # Apply TTL if a value has been set.
  65         if isset ttl; then
  66                 cmd_args="${cmd_args} ttl ${ttl}"
  67         fi
  68
  69         log DEBUG "Creating tunnel device '${device}' (mode=${mode})..."
  70
  71         # Create the device.
  72         cmd ip tunnel add ${device} mode ${mode} \
  73                 remote ${remote_address} local ${local_address} ${cmd_args}
  74         assert [ $? -eq 0 ]
  75 }
  76
  77
  78 function ip_tunnel_del() {
  79         local device=${1}
  80         assert device_exists ${device}
  81
  82         # Make sure the device has been shut down.
  83         device_set_down ${device}
  84
  85         log DEBUG "Removing tunnel device '${device}'..."
  86
  87         ip tunnel del ${device}
  88         assert [ $? -eq 0 ]
  89 }