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342 lines
13 KiB
Bash
342 lines
13 KiB
Bash
#!/bin/sh
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# /etc/rc.d/rc.wireless
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# $Id: rc.wireless,v 1.13 2007/04/13 14:14:43 eha Exp eha $
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#
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# Wireless network card setup.
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#
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# This script sets up PCI, USB, and 32-bit Cardbus wireless devices
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# NOT 16-bit PCMCIA cards! Those are configured in /etc/pcmcia/.
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# Single parameter to this script is the name of a network interface.
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# Normally this script is called from rc.inet1 rather than run
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# directly.
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#
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# This script is a modified '/etc/pcmcia/wireless' script
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# 09/apr/2004 by Eric Hameleers
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# 16/sep/2004 * Eric Hameleers * Fixed iwspy and iwpriv commands
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# 08/apr/2005 * Eric Hameleers * Allow per-interface overrides of the wireless
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# parameters (see /etc/rc.d/rc.inet1.conf)
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# 11/apr/2005 * Eric Hameleers * Tune wpa_supplicant interactions.
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# 23/apr/2005 * Eric Hameleers * First configure card with iwconfig,
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# before starting wpa_supplicant
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# 27/apr/2005 * Eric Hameleers * Multiple 'iwpriv $INTERFACE set' commands.
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# 14/feb/2006 * Eric Hameleers * Better error messages; alternative way of
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# getting HWADDR; parametrized WPA_WAIT value.
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# Don't kill an already running wpa_supplicant.
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# 29/apr/2006 * Pat Volkerding * Reverted HWADDR change, since it relies on
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# a binary (macaddr) that is not built or
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# installed by default since it is not
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# compatible with all interfaces.
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# 15/aug/2006 * Eric Hameleers * Added missing "" around $ESSID, which broke
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# ESSIDs that contain a space character.
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# 10/oct/2006 * Eric Hameleers * Added default empty values for all parameters.
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# This makes a second wireless card leave
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# wpa_supplicant alone if WPA is not configured.
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# 15/oct/2006 * Eric Hameleers * Swapped the calls to "key <key>" and
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# "key restricted" since that might be needed
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# for WEP to work reliably.
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# 09/jan/2007 * Eric Hameleers * Add explicit default values to wireless params;
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# also set the ESSID before IWPRIV commands,
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# needed for some RaLink cards;
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# use /proc/net/wireless instead of calling
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# iwconfig to determine if a card is wireless.
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# 13/apr/2007 * Eric Hameleers * Use of the IWPRIV variable was broken.
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# NOTE: if you need to enter multiple parameters
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# in IWPRIV, you must separate them with the pipe
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# (|) character - this used to be a space char!
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# See the example in rc.inet1.conf.
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# 16/apr/2008 * Pat Volkerding * Make sure that HWADDR is all upper case.
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# 23/apr/2008 * Pat Volkerding * Increase sleep time after bringing up an
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# interface to 3 seconds. Some drivers
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# need this additional time to initalize.
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# 02/jan/2010 * Pat Volkerding * Look for /sys/class/net/$NETDEV/wireless rather
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# than the contents of /proc/net/wireless to find
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# if a network device is wireless. In newer
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# kernels devices will not show up in
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# /proc/net/wireless until active.
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# 16/aug/2012 * Pat Volkerding * Use several tests to determine if an interface
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# is wireless, as the reliability of any given
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# test may depend on the kernel options and the
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# wireless driver used.
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# Convert the MAC address to uppercase in sed.
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# ------------------------------------------------------------------------------
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LOGGER=${LOGGER:-cat}
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if [ -z $IFNAME ] ; then
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echo "WARNING: The script 'rc.wireless' must be executed by 'rc.inet1'!" | $LOGGER
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echo " You should run the command \"/etc/rc.d/rc.inet1 <your_interface>_start\" yourself." | $LOGGER
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return 1 2> /dev/null || exit 1
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fi
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INTERFACE=$1
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# Find the path where wireless tools are installed
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for IWPATH in /usr/{bin,sbin} /usr/local/{bin,sbin} /sbin /bin ; do
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if [ -x $IWPATH/iwconfig ] ; then break ; fi
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done
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# The same for wpa_supplicant (needed for WPA support)
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for SUPPATH in /usr/{bin,sbin} /usr/local/{bin,sbin} /sbin /bin ; do
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if [ -x $SUPPATH/wpa_supplicant ] ; then break ; fi
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done
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# Set all desired settings through the wireless tools
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IWCOMMAND="$IWPATH/iwconfig ${INTERFACE}"
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IWPRIVCMD="$IWPATH/iwpriv ${INTERFACE}"
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IWSPYCMD="$IWPATH/iwspy ${INTERFACE}"
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IFCOMMAND="/sbin/ip link set dev ${INTERFACE}"
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is_wireless_device ()
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{
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# Return 0 for a wireless interface, or 1 for a non-wireless interface.
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if LC_ALL=C $IWPATH/iwconfig $1 2>&1 | grep -q "IEEE 802.11" ; then
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return 0
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elif [ -d /sys/class/net/${1}/wireless ]; then
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return 0
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elif [ "$(cat /sys/class/net/${1}/uevent | grep DEVTYPE)" = "DEVTYPE=wlan" ]; then
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return 0
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else # all tests failed, assume the device is not wireless (or add a better test :)
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return 1
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fi
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}
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###############
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# EXIT POINTS #
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###############
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# Is the device wireless? If not, exit this script.
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is_wireless_device ${INTERFACE} || return 0 2> /dev/null || exit 0
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# If we stop a wireless interface using wpa_supplicant,
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# we'll kill its wpa_supplicant daemon too and exit this script:
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if [ "$2" = "stop" ]; then
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WPAPID=$(echo $(ps axww | grep wpa_supplicant | grep i${INTERFACE}) | cut -f1 -d' ')
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[ ${WPAPID} ] && kill ${WPAPID}
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return 0
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fi
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# -----------------------------------------------------
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# Continue with the script - bringing the interface UP.
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# -----------------------------------------------------
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# Bring interface up - for determining the HWADDR
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$IFCOMMAND up
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sleep 3
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# Get the MAC address for the interface
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HWADDR=$(/sbin/ip link show dev ${INTERFACE} | sed -ne 's/.*link\/ether \(..:..:..:..:..:..\).*/\U\1/p')
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# Empty all wireless parameters- some of them could still be set for a previous interface:
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# when rc.inet1 is sourced from rc.M all scripts are run in the same shell.
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CHANNEL=""
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ESSID=""
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FREQ=""
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FRAG=""
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IWCONFIG=""
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IWPRIV=""
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IWSPY=""
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KEY=""
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MODE=""
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NICKNAME=""
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NWID=""
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RATE=""
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RTS=""
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SENS=""
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WPA=""
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WPADRIVER=""
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WPACONF=""
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WPAWAIT=""
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# Read the configuration information for the card with address $HWADDR
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# from /etc/rc.d/rc.wireless.conf:
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[[ -r /etc/rc.d/rc.wireless.conf ]] && . /etc/rc.d/rc.wireless.conf
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# Let any per-interface overrides (the WLAN_xxxx parameters) that are set
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# in /etc/rc.d/rc.inet1.conf have precedence.
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# The reason: you might have multiple wireless cards of the same brand, or
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# connecting to multiple networks.
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# Position 'i' of this interface in the IFNAME array was determined in rc.inet1
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CHANNEL=${WLAN_CHANNEL[$i]:-${CHANNEL}}
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ESSID=${WLAN_ESSID[$i]:-${ESSID}}
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FREQ=${WLAN_FREQ[$i]:-${FREQ}}
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FRAG=${WLAN_FRAG[$i]:-${FRAG}}
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IWCONFIG=${WLAN_IWCONFIG[$i]:-${IWCONFIG}}
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IWPRIV=${WLAN_IWPRIV[$i]:-${IWPRIV}}
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IWSPY=${WLAN_IWSPY[$i]:-${IWSPY}}
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KEY=${WLAN_KEY[$i]:-${KEY}}
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MODE=${WLAN_MODE[$i]:-${MODE}}
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NICKNAME=${WLAN_NICKNAME[$i]:-${NICKNAME}}
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NWID=${WLAN_NWID[$i]:-${NWID}}
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RATE=${WLAN_RATE[$i]:-${RATE}}
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RTS=${WLAN_RTS[$i]:-${RTS}}
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SENS=${WLAN_SENS[$i]:-${SENS}}
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WPA=${WLAN_WPA[$i]:-${WPA}}
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# The "ext" interface will be default if not explicitly set
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WPADRIVER=${WLAN_WPADRIVER[$i]:-${WPADRIVER:="wext"}}
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# The default config file as installed by the wpa_supplicant package:
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WPACONF=${WLAN_WPACONF[$i]:-${WPACONF:="/etc/wpa_supplicant.conf"}}
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WPAWAIT=${WLAN_WPAWAIT[$i]:-${WPAWAIT:="60"}}
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[ -n "$VERBOSE" -a -n "$INFO" ] && echo "$0: $1 information: '$INFO'"
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###################
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# WIRELESS CONFIG #
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###################
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# Mode needs to be first : some settings apply only in a specific mode!
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if [ -n "$MODE" ] ; then
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echo "$0: $IWCOMMAND mode $MODE" | $LOGGER
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# if $IWCOMMAND fails, try taking the interface down to run it.
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# Some drivers require this.
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if ! $IWCOMMAND mode $MODE 2> /dev/null ; then
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$IFCOMMAND down
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$IWCOMMAND mode $MODE
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$IFCOMMAND up
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sleep 3
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fi
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fi
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# This is a bit hackish, but should do the job right...
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if [ ! -n "$NICKNAME" ] ; then
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NICKNAME=$(/bin/hostname)
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fi
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if [ -n "$ESSID" -o -n "$MODE" ] ; then
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echo "$0: $IWCOMMAND nick $NICKNAME" | $LOGGER
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$IWCOMMAND nick $NICKNAME
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fi
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# Regular stuff...
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if [ -n "$NWID" ] ; then
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echo "$0: $IWCOMMAND nwid $NWID" | $LOGGER
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$IWCOMMAND nwid $NWID
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fi
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if [ -n "$FREQ" ] ; then
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echo "$0: $IWCOMMAND freq $FREQ" | $LOGGER
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$IWCOMMAND freq $FREQ
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elif [ -n "$CHANNEL" ] ; then
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echo "$0: $IWCOMMAND channel $CHANNEL" | $LOGGER
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$IWCOMMAND channel $CHANNEL
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fi
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# WEP keys (non-WPA)
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if [ -n "$KEY" -a ! -n "$WPA" ] ; then
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if [ "$KEY" = "off" ]; then
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echo "$0: $IWCOMMAND key open" | $LOGGER
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$IWCOMMAND key open
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echo "$0: $IWCOMMAND key off" | $LOGGER
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$IWCOMMAND key off
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else
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echo "$0: $IWCOMMAND key ************" | $LOGGER
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$IWCOMMAND key $KEY
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if ! echo "$KEY" | egrep -qw "restricted|open" ; then
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# Set "restricted" as the default security mode:
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echo "$0: $IWCOMMAND key restricted" | $LOGGER
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$IWCOMMAND key restricted
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fi
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fi
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fi
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if [ -n "$SENS" ] ; then
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echo "$0: $IWCOMMAND sens $SENS" | $LOGGER
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$IWCOMMAND sens $SENS
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fi
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if [ -n "$RATE" ] ; then
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echo "$0: $IWCOMMAND rate $RATE" | $LOGGER
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$IWCOMMAND rate $RATE
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fi
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if [ -n "$RTS" ] ; then
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echo "$0: $IWCOMMAND rts $RTS" | $LOGGER
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$IWCOMMAND rts $RTS
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fi
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if [ -n "$FRAG" ] ; then
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echo "$0: $IWCOMMAND frag $FRAG" | $LOGGER
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$IWCOMMAND frag $FRAG
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fi
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# More specific parameters
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if [ -n "$IWCONFIG" ] ; then
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echo "$0: $IWCOMMAND $IWCONFIG" | $LOGGER
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$IWCOMMAND $IWCONFIG
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fi
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if [ -n "$IWSPY" ] ; then
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echo "$0: $IWSPYCMD $IWSPY" | $LOGGER
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$IWSPYCMD $IWSPY
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fi
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# For RaLink cards, the SSID must be set right before configuring WPAPSK/TKIP parameters
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# using iwpriv commands in order to generate the wpapsk password. This should not hurt other cards:
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if [ -n "$ESSID" ] ; then
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echo "$0: $IWCOMMAND essid \"$ESSID\"" | $LOGGER
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$IWCOMMAND essid "$ESSID"
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fi
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# The iwpriv can set one private IOCTL at the time, so if the $IWPRIV
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# variable contains multiple pipe ('|') separated settings, we split them here:
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# WARNING: if your iwpriv commands contain a WEP/WPA key, these can be logged
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# in /var/log/messages!
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if [ -n "$IWPRIV" ] ; then
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echo "${IWPRIV}|" | \
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while read -d '|' iwi; do
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if [ -n "$iwi" ]; then
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echo "$0: '$IWPRIVCMD $iwi'" | $LOGGER
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$IWPRIVCMD $iwi
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fi
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done
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fi
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##################
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# WPA_SUPPLICANT #
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##################
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# Support for WPA (wireless protected access) is provided by wpa_supplicant
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# for those drivers that support it (and it looks like wpa_supplicant is
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# the future for WPA support in Linux anyway)
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if [ "$WPA" = "wpa_supplicant" ] || [ "$WPA" = "wpaxsupplicant" ] && [ -x ${SUPPATH}/wpa_supplicant ]; then
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# Interface down, so wpa_supplicant can associate with the AP
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$IFCOMMAND down
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#WPACONF=${WPACONF:-/etc/wpa_supplicant.conf}
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WPA_OPTIONS=""
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[ ${WPADRIVER} ] && WPA_OPTIONS="-D${WPADRIVER}" # specify the driver
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[ ${WPA} = "wpaxsupplicant" ] && WPA_OPTIONS="${WPA_OPTIONS} -e" # Use external xsupplicant (disables the internal supplicant)
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# We leave a running wpa_supplicant process in peace:
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WPAPID=$(echo $(ps axww | grep wpa_supplicant | grep i${INTERFACE}) | cut -f1 -d' ')
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if [ ${WPAPID} ]; then
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echo "$0: wpa_supplicant found running already" | $LOGGER
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else
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echo "$0: wpa_supplicant -B -c${WPACONF} ${WPA_OPTIONS} -i$INTERFACE" | $LOGGER
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${SUPPATH}/wpa_supplicant -B -c${WPACONF} ${WPA_OPTIONS} -i$INTERFACE
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fi
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# Buy wpa_supplicant some time to authenticate before bringing the
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# interface back up... but we don't wait forever:
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# You can increase this value in rc.inet1.conf (WLAN_WPAWAIT) or rc.wireless.conf (WPAWAIT)
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# if your card takes longer to associate:
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WPAWAIT=${WPAWAIT:-10}
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wi=0
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while [ $wi -lt $WPAWAIT ]; do
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wi=$(($wi+1)); sleep 1
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if (grep -q "^ctrl_interface=" ${WPACONF}); then
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if (LC_ALL=C ${SUPPATH}/wpa_cli -i$INTERFACE status | grep -q "^wpa_state=COMPLETED"); then break; fi
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else
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if (LC_ALL=C ${IWCOMMAND} | grep -Eq "Encryption key:....-"); then break; fi
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fi
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done
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if [ $wi -eq $WPAWAIT ]; then
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echo "WPA authentication did not complete, try running '/etc/rc.d/rc.inet1 ${INTERFACE}_start' in a few seconds." | $LOGGER
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fi
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# Bring interface up to avoid 'not ready' errors when calling iwconfig
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$IFCOMMAND up
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sleep 3
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else
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# ESSID need to be last: most devices re-perform the scanning/discovery
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# when this is set, and things like encryption keys had better be
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# defined if we want to discover the right set of APs/nodes.
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# NOTE: when automatic association does not work, but you manage to get
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# an IP address by manually setting the ESSID and then calling dhcpcd,
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# then the cause might be the incorrect definition of your ESSID="bla"
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# parameter in rc.wireless.conf.
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# Debug your wireless problems by running 'iwevent' while the card
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# is being configured.
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if [ -n "$ESSID" ] ; then
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echo "$0: $IWCOMMAND essid \"$ESSID\"" | $LOGGER
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$IWCOMMAND essid "$ESSID"
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fi
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fi
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