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   1 #!/bin/sh
   2
   3 #####################################################################
   4 ## Purpose
   5 # This file is executed by ifupdown in pre-up, post-up, pre-down and
   6 # post-down phases of network interface configuration. It allows
   7 # ifup(8), and ifdown(8) to manage wpa_supplicant(8) and wpa_cli(8)
   8 # processes running in daemon mode.
   9 #
  10 # /etc/wpa_supplicant/functions.sh is sourced by this file.
  11 #
  12 # This file is provided by the wpasupplicant package.
  13
  14 #####################################################################
  15 # Copyright (C) 2006 - 2009 Debian/Ubuntu wpasupplicant Maintainers
  16 # <pkg-wpa-devel@lists.alioth.debian.org>
  17 #
  18 # This program is free software; you can redistribute it and/or
  19 # modify it under the terms of the GNU General Public License
  20 # as published by the Free Software Foundation; either version 2
  21 # of the License, or (at your option) any later version.
  22 #
  23 # This program is distributed in the hope that it will be useful,
  24 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  25 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26 # GNU General Public License for more details.
  27 #
  28 # On Debian GNU/Linux systems, the text of the GPL license,
  29 # version 2, can be found in /usr/share/common-licenses/GPL-2.
  30
  31 if [ -n "$IF_WPA_MAINT_DEBUG" ]; then
  32         set -x
  33 fi
  34
  35 # quit if we're called for the loopback
  36 if [ "$IFACE" = lo ]; then
  37         exit 0
  38 fi
  39
  40 # allow wpa_supplicant interface to be specified via wpa-iface
  41 # useful for starting wpa_supplicant on one interface of a bridge
  42 if [ -n "$IF_WPA_IFACE" ]; then
  43         WPA_IFACE="$IF_WPA_IFACE"
  44 else
  45         WPA_IFACE="$IFACE"
  46 fi
  47
  48 # source functions
  49 if [ -f /etc/wpa_supplicant/functions.sh ]; then
  50         . /etc/wpa_supplicant/functions.sh
  51 else
  52         exit 0
  53 fi
  54
  55 # quit if executables are not installed
  56 if [ ! -x "$WPA_SUP_BIN" ] || [ ! -x "$WPA_CLI_BIN" ]; then
  57         exit 0
  58 fi
  59
  60 do_start () {
  61         if test_wpa_cli; then
  62                 # if wpa_action is active for this IFACE, do nothing
  63                 ifupdown_locked && exit 0
  64
  65                 # if the administrator is calling ifup, say something useful
  66                 if [ "$PHASE" = "pre-up" ]; then
  67                         wpa_msg stderr "wpa_action is managing ifup/ifdown state of $WPA_IFACE"
  68                         wpa_msg stderr "execute \`ifdown --force $WPA_IFACE' to stop wpa_action"
  69                 fi
  70                 exit 1
  71         elif ! set | grep -q "^IF_WPA"; then
  72                 # no wpa- option defined for IFACE, do nothing
  73                 exit 0
  74         fi
  75
  76         # ensure stale ifupdown_lock marker is purged
  77         ifupdown_unlock
  78
  79         # preliminary sanity checks for roaming daemon
  80         if [ -n "$IF_WPA_ROAM" ]; then
  81                 if [ "$METHOD" != "manual" ]; then
  82                         wpa_msg stderr "wpa-roam can only be used with the \"manual\" inet METHOD"
  83                         exit 1
  84                 fi
  85                 if [ -n "$IF_WPA_MAPPING_SCRIPT" ]; then
  86                         if ! type "$IF_WPA_MAPPING_SCRIPT" >/dev/null; then
  87                                 wpa_msg stderr "wpa-mapping-script \"$IF_WPA_MAPPING_SCRIPT\" is not valid"
  88                                 exit 1
  89                         fi
  90                 fi
  91                 if [ -n "$IF_WPA_MAPPING_SCRIPT_PRIORITY" ] && [ -z "$IF_WPA_MAPPING_SCRIPT" ]; then
  92                         wpa_msg stderr "\"wpa-mapping-script-priority 1\" is invalid without a wpa-mapping-script"
  93                         exit 1
  94                 fi
  95                 IF_WPA_CONF="$IF_WPA_ROAM"
  96                 WPA_ACTION_SCRIPT="/usr/sbin/wpa_action"
  97         fi
  98
  99         # master function; determines if ifupdown.sh should do something or not
 100         if [ -n "$IF_WPA_CONF" ] && [ "$IF_WPA_CONF" != "managed" ]; then
 101                 if [ ! -s "$IF_WPA_CONF" ]; then
 102                         wpa_msg stderr "cannot read contents of $IF_WPA_CONF"
 103                         exit 1
 104                 fi
 105                 WPA_SUP_CONF_CTRL_DIR=$(sed -n -e 's/[[:space:]]*#.*//g' -e 's/[[:space:]]\+.*$//g' \
 106                         -e 's/^ctrl_interface=\(DIR=\)\?\(.*\)/\2/p' "$IF_WPA_CONF")
 107                 if [ -n "$WPA_SUP_CONF_CTRL_DIR" ]; then
 108                         WPA_CTRL_DIR="$WPA_SUP_CONF_CTRL_DIR"
 109                         WPA_SUP_CONF="-c $IF_WPA_CONF"
 110                 else
 111                         # specify the default ctrl_interface since none was defined in
 112                         # the given IF_WPA_CONF
 113                         WPA_SUP_CONF="-c $IF_WPA_CONF -C $WPA_CTRL_DIR"
 114                 fi
 115         else
 116                 # specify the default ctrl_interface
 117                 WPA_SUP_CONF="-C $WPA_CTRL_DIR"
 118         fi
 119 }
 120
 121 do_stop () {
 122         if test_wpa_cli; then
 123                 # if wpa_action is active for this IFACE and calling ifdown,
 124                 # do nothing
 125                 ifupdown_locked && exit 0
 126         elif test_wpa_supplicant; then
 127                 # wpa_supplicant process exists for this IFACE, but wpa_cli
 128                 # process does not. Allow stop mode to kill this process.
 129                 :
 130         else
 131                 exit 0
 132         fi
 133 }
 134
 135 case "$MODE" in
 136         start)
 137                 do_start
 138                 case "$PHASE" in
 139                         pre-up)
 140                                 kill_wpa_supplicant
 141                                 init_wpa_supplicant     || exit 1
 142                                 conf_wpa_supplicant     || { kill_wpa_supplicant; exit 1; }
 143                                 ;;
 144                         post-up)
 145                                 init_wpa_cli            || { kill_wpa_supplicant; exit 1; }
 146                                 ;;
 147                 esac
 148                 ;;
 149
 150         stop)
 151                 do_stop
 152                 case "$PHASE" in
 153                         pre-down)
 154                                 kill_wpa_cli
 155                                 ;;
 156                         post-down)
 157                                 kill_wpa_supplicant
 158                                 ;;
 159                         *)
 160                                 wpa_msg stderr "unknown phase: \"$PHASE\""
 161                                 exit 1
 162                                 ;;
 163                 esac
 164                 ;;
 165
 166         *)
 167                 wpa_msg stderr "unknown mode: \"$MODE\""
 168                 exit 1
 169                 ;;
 170 esac
 171
 172 exit 0