openrc/net.Linux/iwconfig.sh

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# Copyright 2004-2007 Gentoo Foundation
# Copyright 2007 Roy Marples
# All rights reserved
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
_config_vars="$_config_vars ssid mode associate_timeout sleep_scan preferred_aps blacklist_aps"
iwconfig_depend() {
program /sbin/iwconfig
after plug
before interface
provide wireless
}
iwconfig_get_wep_status() {
local mode= status="disabled"
# No easy way of doing this grep in bash regex :/
if LC_ALL=C iwconfig "${IFACE}" | grep -qE "^ +Encryption key:[*0-9,A-F]" ; then
status="enabled"
mode=$(LC_ALL=C iwconfig "${IFACE}" | sed -n -e 's/^.*Security mode:\(.*[^ ]\).*/\1/p')
[ -n "${mode}" ] && mode=" - ${mode}"
fi
echo "(WEP ${status}${mode})"
}
_get_ssid() {
local i=5 ssid=
while [ ${i} -gt 0 ] ; do
ssid=$(iwgetid --raw "${IFACE}")
if [ -n "${ssid}" ] ; then
echo "${ssid}"
return 0
fi
sleep 1
i=$((${i} + 1))
done
return 1
}
_get_ap_mac_address() {
local mac="$(iwgetid --raw --ap "${IFACE}")"
case "${mac}" in
"00:00:00:00:00:00") return 1 ;;
"44:44:44:44:44:44") return 1 ;;
"FF:00:00:00:00:00") return 1 ;;
"FF:FF:FF:FF:FF:FF") return 1 ;;
*) echo "${mac}" ;;
esac
}
iwconfig_get_mode() {
LC_ALL=C iwgetid --mode "${IFACE}" | \
sed -n -e 's/^.*Mode:\(.*\)/\1/p' | \
tr '[:upper:]' '[:lower:]'
}
iwconfig_set_mode() {
local mode="$1"
[ "${mode}" = "$(iwconfig_get_mode)" ] && return 0
# Devicescape stack requires the interface to be down
_down
iwconfig "${IFACE}" mode "${mode}" || return 1
_up
}
iwconfig_get_type() {
LC_ALL=C iwconfig "${IFACE}" | sed -n -e 's/^'"$1"' *\([^ ]* [^ ]*\).*/\1/p'
}
iwconfig_report() {
local mac= m="connected to"
local ssid="$(_get_ssid)"
local wep_status="$(iwconfig_get_wep_status)"
local channel="$(iwgetid --raw --channel "${iface}")"
[ -n "${channel}" ] && channel="on channel ${channel} "
local mode="$(iwconfig_get_mode)"
if [ "${mode}" = "master" ]; then
m="configured as"
else
mac="$(_get_ap_mac_address)"
[ -n "${mac}" ] && mac=" at ${mac}"
fi
eindent
einfo "${IFACE} ${m} SSID \"${SSID}\"${mac}"
einfo "in ${mode} mode ${channel}${wep_status}"
eoutdent
}
iwconfig_get_wep_key() {
local mac="$1" key=
[ -n "${mac}" ] && mac="$(echo "${mac}" | sed -e 's/://g')"
eval key=\$mac_key_${mac}
[ -z "${key}" ] && eval key=\$key_${SSIDVAR}
if [ -z "${key}" ] ; then
echo "off"
else
set -- ${key}
local x= e=false
for x in "$@" ; do
if [ "${x}" = "enc" ] ; then
e=true
break
fi
done
${e} || key="${key} enc open"
echo "${key}"
fi
}
iwconfig_user_config() {
local conf= var=${SSIDVAR} config=
[ -z "${var}" ] && var=${IFVAR}
config="$(_get_array "iwconfig_${var}")"
local IFS="$__IFS"
for conf in ${config}; do
unset IFS
if ! eval iwconfig "${IFACE}" "${conf}" ; then
ewarn "${IFACE} does not support the following configuration commands"
ewarn " ${conf}"
fi
done
unset IFS
config="$(_get_array "iwpriv_${var}")"
local IFS="$__IFS"
for conf in ${config}; do
unset IFS
if ! eval iwpriv "${IFACE}" "${conf}" ; then
ewarn "${IFACE} does not support the following private ioctls"
ewarn " ${conf}"
fi
done
}
iwconfig_setup_specific() {
local mode="$1" channel=
if [ -z "${SSID}" ]; then
eerror "${IFACE} requires an SSID to be set to operate in ${mode} mode"
eerror "adjust the ssid_${IFVAR} setting in /etc/conf.d/net"
return 1
fi
SSIDVAR=$(_shell_var "${SSID}")
local key=$(iwconfig_get_wep_key)
iwconfig_set_mode "${mode}"
# Now set the key
if ! eval iwconfig "${IFACE}" key "${key}" ; then
if [ "${key}" != "off" ]; then
ewarn "${IFACE} does not support setting keys"
ewarn "or the parameter \"mac_key_${SSIDVAR}\" or \"key_${SSIDVAR}\" is incorrect"
fi
fi
# Then set the SSID
if ! iwconfig "${IFACE}" essid "${SSID}" ; then
eerror "${IFACE} does not support setting SSID to \"${SSID}\""
return 1
fi
eval channel=\$channel_${SSIDVAR}
[ -z "${channel}" ] && eval channel=\$channel_${IFVAR}
# We default the channel to 3
if ! iwconfig "${IFACE}" channel "${channel:-3}" ; then
ewarn "${IFACE} does not support setting the channel to \"${channel:-3}\""
return 1
fi
# Finally apply the user Config
iwconfig_user_config
iwconfig_report
return 0
}
iwconfig_wait_for_association() {
local timeout= i=0
eval timeout=\$associate_timeout_${IFVAR}
timeout=${timeout:-10}
[ ${timeout} -eq 0 ] \
&& vewarn "WARNING: infinite timeout set for association on ${IFACE}"
while true; do
# Use sysfs if we can
if [ -e /sys/class/net/"${IFACE}"/carrier ] ; then
if [ "$(cat /sys/class/net/"${IFACE}"/carrier)" = "1" ] ; then
# Double check we have an ssid. This is mainly for buggy
# prism54 drivers that always set their carrier on :/
[ -n "$(iwgetid --raw "${IFACE}")" ] && return 0
fi
else
local atest=
eval atest=\$associate_test_${IFVAR}
atest=${atest:-mac}
if [ "${atest}" = "mac" -o "${atest}" = "all" ] ; then
[ -n "$(_get_ap_mac_address)" ] && return 0
fi
if [ "${atest}" = "quality" -o "${atest}" = "all" ] ; then
[ "$(sed -n -e 's/^.*'"${IFACE}"': *[0-9]* *\([0-9]*\).*/\1/p' \
/proc/net/wireless)" != "0" ] && return 0
fi
fi
sleep 1
[ ${timeout} -eq 0 ] && continue
i=$((${i} + 1))
[ ${i} -ge ${timeout} ] && return 1
done
return 1
}
iwconfig_associate() {
local mode="${1:-managed}" mac="$2" wep_required="$3" freq="$4" chan="$5"
local w="(WEP Disabled)" key=
iwconfig_set_mode "${mode}"
if [ "${SSID}" = "any" ]; then
iwconfig "${IFACE}" ap any 2>/dev/null
unset SSIDVAR
else
SSIDVAR=$(_shell_var "${SSID}")
key="$(iwconfig_get_wep_key "${mac}")"
if [ "${wep_required}" = "on" -a "${key}" = "off" ] ; then
ewarn "WEP key is not set for \"${SSID}\" - not connecting"
return 1
fi
if [ "${wep_required}" = "off" -a "${key}" != "off" ] ; then
key="off"
ewarn "\"${SSID}\" is not WEP enabled - ignoring setting"
fi
if ! eval iwconfig "${IFACE}" key "${key}" ; then
if [ "${key}" != "off" ] ; then
ewarn "${IFACE} does not support setting keys"
ewarn "or the parameter \"mac_key_${SSIDVAR}\" or \"key_${SSIDVAR}\" is incorrect"
return 1
fi
fi
[ "${key}" != "off" ] && w="$(iwconfig_get_wep_status "${iface}")"
fi
if ! iwconfig "${IFACE}" essid "${SSID}" ; then
if [ "${SSID}" != "any" ] ; then
ewarn "${IFACE} does not support setting SSID to \"${SSID}\""
fi
fi
# Only use channel or frequency
if [ -n "${chan}" ] ; then
iwconfig "${IFACE}" channel "${chan}"
elif [ -n "${freq}" ] ; then
iwconfig "${IFACE}" freq "${freq}"
fi
[ -n "${mac}" ] && iwconfig "${IFACE}" ap "${mac}"
# Finally apply the user Config
iwconfig_user_config
ebegin "Connecting to \"${SSID}\" in ${mode} mode ${w}"
if [ "${SSID}" != "any" ] && type preassociate >/dev/null 2>/dev/null ; then
veinfo "Running preassociate function"
veindent
( preassociate )
local e=$?
veoutdent
if [ ${e} -eq 0 ] ; then
veend 1 "preassociate \"${SSID}\" on ${IFACE} failed"
return 1
fi
fi
if ! iwconfig_wait_for_association ; then
eend 1
return 1
fi
eend 0
if [ "${SSID}" = "any" ]; then
SSID="$(_get_ssid)"
iwconfig_associate
return $?
fi
iwconfig_report
if type postassociate >/dev/null 2>/dev/null ; then
veinfo "Running postassociate function"
veindent
( postassociate )
veoutdent
fi
return 0
}
iwconfig_scan() {
local x= i=0 scan=
einfo "Scanning for access points"
eindent
# Sleep if required
eval x=\$sleep_scan_${IFVAR}
[ -n "${x}" ] && sleep "${x}"
while [ ${i} -lt 3 ] ; do
local scan="${scan}${scan:+ }$(LC_ALL=C iwlist "${IFACE}" scan 2>/dev/null | sed -e "s/'/'\\\\''/g" -e "s/$/'/g" -e "s/^/'/g")"
# If this is the first pass and txpower as off and we have no results
# then we need to wait for at least 2 seconds whilst the interface
# does an initial scan.
if [ "${i}" = "0" -a "${txpowerwasoff}" = "0" ] ; then
case "${scan}" in
"'${IFACE} "*"No scan results"*)
sleep 2
txpowerwasoff=1
continue
;;
esac
fi
i=$((${i} + 1))
done
if [ -z "${scan}" ] ; then
ewarn "${iface} does not support scanning"
eoutdent
eval x=\$adhoc_ssid_${IFVAR}
[ -n "${x}" ] && return 0
if [ -n "${preferred_aps}" ] ; then
[ "${associate_order}" = "forcepreferred" ] || \
[ "${associate_order}" = "forcepreferredonly" ] && return 0
fi
eerror "You either need to set a preferred_aps list in /etc/conf.d/wireless"
eerror " preferred_aps=\"SSID1 SSID2\""
eerror " and set associate_order_${IFVAR}=\"forcepreferred\""
eerror " or set associate_order_${IFVAR}=\"forcepreferredonly\""
eerror "or hardcode the SSID to \"any\" and let the driver find an Access Point"
eerror " ssid_${IFVAR}=\"any\""
eerror "or configure defaulting to Ad-Hoc when Managed fails"
eerror " adhoc_ssid_${IFVAR}=\"WLAN\""
eerror "or hardcode the SSID against the interface (not recommended)"
eerror " ssid_${IFVAR}=\"SSID\""
return 1
fi
APS=-1
eval set -- ${scan}
for line in "$@" ; do
case "${line}" in
*Address:*)
APS=$((${APS} + 1))
eval MAC_${APS}=\""$(echo "${line#*: }" | tr '[:lower:]' '[:upper:]')"\"
eval QUALITY_${APS}=0
;;
*ESSID:*)
x=${line#*\"}
x=${x%*\"}
eval SSID_${APS}=\$x
;;
*Mode:*)
x="$(echo "${line#*:}" | tr '[:upper:]' '[:lower:]')"
if [ "${x}" = "master" ] ; then
eval MODE_${APS}=\"managed\"
else
eval MODE_${APS}=\$x
fi
;;
*'Encryption key:'*)
x=${line#*:}
eval ENC_${APS}=\$x
;;
#*Frequency:*)
# freq[i]="${line#*:}"
# x="${freq[i]#* }"
# freq[i]="${freq[i]%% *}${x:0:1}"
# ;;
*Channel:*)
x=${line#*:}
x=${x%% *}
eval CHAN_${APS}=\$x
;;
*Quality*)
x=${line#*:}
x=${x%/*}
x="$(echo "${x}" | sed -e 's/[^[:digit:]]//g')"
x=${x:-0}
eval QUALITY_${APS}=\$x
;;
esac
done
if [ -z "${MAC_0}" ]; then
ewarn "no access points found"
eoutdent
return 1
fi
# Sort based on quality
local i=0 k=1 a= b= x= t=
while [ ${i} -lt ${APS} ] ; do
k=$((${i} + 1))
while [ ${k} -le ${APS} ] ; do
eval a=\$QUALITY_${i}
[ -z "${a}" ] && break
eval b=\$QUALITY_${k}
if [ -n "${b}" -a "${a}" -lt "${b}" ] ; then
for x in MAC SSID CHAN QUALITY ENC ; do
eval t=\$${x}_${i}
eval ${x}_${i}=\$${x}_${k}
eval ${x}_${k}=\$t
done
fi
k=$((${k} + 1))
done
i=$((${i} + 1))
done
# Strip any duplicates
local i=0 k=1 a= b=
while [ ${i} -lt ${APS} ] ; do
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k=$((${i} + 1))
while [ ${k} -le ${APS} ] ; do
eval a=\$MAC_${i}
eval b=\$MAC_${k}
if [ "${a}" = "${b}" ] ; then
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eval a=\$QUALITY_${i}
eval b=\$QUALITY_${k}
local u=${k}
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# We need to split this into two tests, otherwise bash errors
[ -n "${a}" -a -n "${b}" ] && [ "${a}" -lt "${b}" ] && u=${i}
unset MAC_${u} SSID_${u} CHAN_${u} QUALITY_${u} ENC_${u}
fi
k=$((${k} + 1))
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done
i=$((${i} + 1))
done
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local i=0 e= m= s=
while [ ${i} -le ${APS} ] ; do
eval x=\$MAC_${i}
if [ -z "${x}" ] ; then
i=$((${i} + 1))
continue
fi
eval m=\$MODE_${i}
eval s=\$SSID_${i}
eval q=\$QUALITY_${i}
eval e=\$ENC_${i}
if [ -n "${e}" -a "${e}" != "off" ] ; then
e=", encrypted"
else
e=""
fi
if [ -z "${s}" ] ; then
einfo "Found ${x}, ${m}${e}"
else
einfo "Found \"${s}\" at ${x}, ${m}${e}"
fi
x="$(echo "${x}" | sed -e 's/://g')"
eval x=\$mac_ssid_${x}
if [ -n "${x}" ] ; then
eval SSID_${i}=\$x
s=${x}
eindent
einfo "mapping to \"${x}\""
eoutdent
fi
eval set -- $(_flatten_array "blacklist_aps_${IFVAR}")
[ $# = 0 ] && eval set -- $(_flatten_array "blacklist_aps")
for x in "$@"; do
if [ "${x}" = "${s}" ] ; then
ewarn "${s} has been blacklisted - not connecting"
unset SSID_${i} MAC_${i} CHAN_${i} QUALITY_${i} ENC_${i}
fi
done
i=$((${i} + 1))
done
eoutdent
}
iwconfig_force_preferred() {
eval set -- $(_flatten_array "preferred_aps_${IFVAR}")
[ $# = 0 ] && eval set -- $(_flatten_array "preferred_aps")
[ $# = 0 ] && return 1
ewarn "Trying to force preferred in case they are hidden"
for ssid in "$@"; do
local found_AP=false i=0 e=
while [ ${i} -le ${APS} ] ; do
eval e=\$SSID_${i}
if [ "${e}" = "${ssid}" ] ; then
found_AP=true
break
fi
i=$((${i} + 1))
done
if ! ${found_AP} ; then
SSID=${e}
iwconfig_associate && return 0
fi
done
ewarn "Failed to associate with any preferred access points on ${IFACE}"
return 1
}
iwconfig_connect_preferred() {
local ssid= i= mode= mac= enc= freq= chan=
eval set -- $(_flatten_array "preferred_aps_${IFVAR}")
[ $# = 0 ] && eval set -- $(_flatten_array "preferred_aps")
for ssid in "$@"; do
unset IFS
i=0
while [ ${i} -le ${APS} ] ; do
eval e=\$SSID_${i}
if [ "${e}" = "${ssid}" ] ; then
SSID=${e}
eval mode=\$MODE_${i}
eval mac=\$MAC_${i}
eval enc=\$ENC_${i}
eval freq=\$FREQ_${i}
eval chan=\$CHAN_${i}
iwconfig_associate "${mode}" "${mac}" "${enc}" "${freq}" \
"${chan}" && return 0
fi
i=$((${i} + 1))
done
done
return 1
}
iwconfig_connect_not_preferred() {
local ssid= i=0 mode= mac= enc= freq= chan= pref=false
while [ ${i} -le ${APS} ] ; do
eval e=\$SSID_${i}
if [ -n "${e}" ] ; then
eval set -- $(_flatten_array "preferred_aps_${IFVAR}")
[ $# = 0 ] && eval set -- $(_flatten_array "preferred_aps")
for ssid in "$@"; do
if [ "${e}" = "${ssid}" ] ; then
pref=true
break
fi
done
if ! ${pref} ; then
SSID=${e}
eval mode=\$MODE_${i}
eval mac=\$MAC_${i}
eval enc=\$ENC_${i}
eval freq=\$FREQ_${i}
eval chan=\$CHAN_${i}
iwconfig_associate "${mode}" "${mac}" "${enc}" "${freq}" \
"${chan}" && return 0
fi
fi
i=$((${i} + 1))
done
return 1
}
iwconfig_defaults() {
local x=
for x in txpower rate rts frag ; do
iwconfig "${IFACE}" "${x}" auto 2>/dev/null
done
# Release the AP forced
# Must do ap and then ssid otherwise scanning borks
iwconfig "${IFACE}" ap off 2>/dev/null
iwconfig "${IFACE}" essid off 2>/dev/null
}
iwconfig_configure() {
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local x= APS=
eval SSID=\$ssid_${IFVAR}
# Support old variable
[ -z "${SSID}" ] && eval SSID=\$essid_${IFVAR}
# Setup ad-hoc mode?
eval x=\$mode_${IFVAR}
x=${x:-managed}
if [ "${x}" = "ad-hoc" -o "${x}" = "master" ] ; then
iwconfig_setup_specific "${x}"
return $?
fi
if [ "${x}" != "managed" -a "${x}" != "auto" ] ; then
eerror "Only managed, ad-hoc, master and auto modes are supported"
return 1
fi
# Has an SSID been forced?
if [ -n "${SSID}" ]; then
iwconfig_set_mode "${x}"
iwconfig_associate && return 0
[ "${SSID}" = "any" ] && iwconfig_force_preferred && return 0
eval SSID=\$adhoc_ssid_${IFVAR}
if [ -n "${SSID}" ]; then
iwconfig_setup_specific ad-hoc
return $?
fi
return 1
fi
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eval x=\$preferred_aps_${IFVAR}
[ -n "${x}" ] && preferred_aps=${x}
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eval x=\$blacklist_aps_${IFVAR}
[ -n "${x}" ] && blacklist_aps=${x}
eval x=\$associate_order_${IFVAR}
[ -n "${x}" ] && associate_order=${x}
associate_order=${associate_order:-any}
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if [ "${associate_order}" = "forcepreferredonly" ]; then
iwconfig_force_preferred && return 0
else
iwconfig_scan || return 1
iwconfig_connect_preferred && return 0
[ "${associate_order}" = "forcepreferred" ] || \
[ "${associate_order}" = "forceany" ] && \
iwconfig_force_preferred && return 0
[ "${associate_order}" = "any" ] || \
[ "${associate_order}" = "forceany" ] && \
iwconfig_connect_not_preferred && return 0
fi
e="associate with"
[ -z "${MAC_0}" ] && e="find"
[ "${preferred_aps}" = "force" ] || \
[ "${preferred_aps}" = "forceonly" ] && \
e="force"
e="Couldn't ${e} any access points on ${IFACE}"
eval SSID=\$adhoc_ssid_${IFVAR}
if [ -n "${SSID}" ]; then
ewarn "${e}"
iwconfig_setup_specific ad-hoc
return $?
fi
eerror "${e}"
return 1
}
iwconfig_pre_start() {
# We don't configure wireless if we're being called from
# the background
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yesno ${IN_BACKGROUND} && return 0
save_options "SSID" ""
_exists || return 0
if ! _is_wireless ; then
veinfo "Wireless extensions not found for ${IFACE}"
return 0
fi
# Warn about old file - we want to punt it really
if [ -e /etc/conf.d/wireless ] ; then
ewarn "/etc/conf.d/wireless is deprecated"
ewarn "Please put all settings into /etc/conf.d/net"
. /etc/conf.d/wireless
fi
# Store the fact that tx-power was off so we default to a longer
# wait if our scan returns nothing
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LC_ALL=C iwconfig "${IFACE}" | sed -e '1d' | grep -q "Tx-Power=off"
local txpowerwasoff=$?
iwconfig_defaults
iwconfig_user_config
# Set the base metric to be 2000
metric=2000
# Check for rf_kill - only ipw supports this at present, but other
# cards may in the future.
if [ -e /sys/class/net/"${IFACE}"/device/rf_kill ] ; then
if [ $(cat /sys/class/net/"${IFACE}"/device/rf_kill) != "0" ] ; then
eerror "Wireless radio has been killed for interface ${IFACE}"
return 1
fi
fi
einfo "Configuring wireless network for ${IFACE}"
# Are we a proper IEEE device?
# Most devices reutrn IEEE 802.11b/g - but intel cards return IEEE
# in lower case and RA cards return RAPCI or similar
# which really sucks :(
# For the time being, we will test prism54 not loading firmware
# which reports NOT READY!
x="$(iwconfig_get_type)"
if [ "${x}" = "NOT READY!" ]; then
eerror "Looks like there was a probem loading the firmware for ${IFACE}"
return 1
fi
if iwconfig_configure ; then
save_options "SSID" "${SSID}"
return 0
fi
eerror "Failed to configure wireless for ${IFACE}"
iwconfig_defaults
iwconfig "${IFACE}" txpower off 2>/dev/null
unset SSID SSIDVAR
_down
return 1
}
iwconfig_post_stop() {
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yesno ${IN_BACKGROUND} && return 0
_exists || return 0
iwconfig_defaults
iwconfig "${IFACE}" txpower off 2>/dev/null
}
# vim: set ts=4