initscripts/etc/sysconfig/network-scripts/ifup-wireless

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#!/bin/sh
# Copyright (c) 2003-2009 by Silvan Calarco <silvan.calarco@mambasoft.it>
# Copyright (c) 2003-2009,2013 by Davide Madrisan <davide.madrisan@gmail.com>
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# Only meant to be called from ifup.
# Configure wireless network device options.
# Valid variables:
# WIRELESS_ESSID
# WIRELESS_MODE
# WIRELESS_ENCMODE:
# WIRELESS_NWID
# WIRELESS_CHANNEL
# WIRELESS_FREQUENCY
# WIRELESS_AP
# WIRELESS_FREQ
# WIRELESS_RATE
# WIRELESS_ENC
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unset WIRELESS_OPTS WIRELESS_OPTS2
if [ "$WIRELESS_ESSID" ]; then
tmpfile=`tempfile 2>/dev/null`
tmpfile1=`tempfile 2>/dev/null`
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if [ "$tmpfile" ]; then
ifconfig ${DEVICE} up
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unset vname found_essid
# Note: iwlist scan essid option does not work with all drivers
# (see man iwlist) so we split cell information below
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iwlist ${DEVICE} scan essid $WIRELESS_ESSID > $tmpfile
# Note: sometimes iwlist scan fails with "Device or resource busy",
# so we try again
[ -s $tmpfile ] ||
{ ifconfig ${DEVICE} down
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ifconfig ${DEVICE} up
iwlist ${DEVICE} scan essid $WIRELESS_ESSID > $tmpfile; }
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while read line; do
if [ "${line:0:5}" = "Cell " ]; then
[ "$found_essid" ] && break || > $tmpfile1
fi
echo $line >> $tmpfile1
[ "$line" = "ESSID:\"$WIRELESS_ESSID\"" ] && found_essid=1
done < $tmpfile
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> $tmpfile
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while read line; do
vname=${line/:*}
if [ "${line:0:4}" = "Cell" ]; then
vname="${line/* }"
vval=${line/*Address:}
vname="Address"
elif [ "${line/Unknown:}" != "$line" ]; then
continue
else
vname=${line/:*}
vname=`echo ${vname} | tr ' ' _`
vname=${vname/_(1)}
vval=${line/*:}
fi
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vname=WIRELESS_AUTO_${vname/* }
vval=${vval/ }
vval=\"${vval/GHz*}\"
if [ "$vname" = "WIRELESS_AUTO_Mode" -o \
"$vname" = "WIRELESS_AUTO_Channel" -o \
"$vname" = "WIRELESS_AUTO_Address" -o \
"$vname" = "WIRELESS_AUTO_Frequency" -o \
"$vname" = "WIRELESS_AUTO_IE" -o \
"$vname" = "WIRELESS_AUTO_Group_Cipher" -o \
"$vname" = "WIRELESS_AUTO_Pairwise_Ciphers" -o \
"$vname" = "WIRELESS_AUTO_Authentication_Suites" ]; then
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echo $vname=$vval >> $tmpfile
fi
done < $tmpfile1
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. $tmpfile
else
echo "\
Warning: unable to create temporary file; skipping wireless autodetection"
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fi
rm -f $tmpfile $tmpfile1
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fi
[ "$WIRELESS_ENCMODE" ] || WIRELESS_ENCMODE="open"
[ "$WIRELESS_MODE" ] && WIRELESS_OPTS="$WIRELESS_OPTS mode $WIRELESS_MODE"
[ "$WIRELESS_ESSID" ] && WIRELESS_OPTS="$WIRELESS_OPTS essid $WIRELESS_ESSID"
[ "$WIRELESS_NWID" ] && WIRELESS_OPTS="$WIRELESS_OPTS nwid $WIRELESS_NWID"
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if [ "$WIRELESS_CHANNEL" ]; then
WIRELESS_OPTS="$WIRELESS_OPTS channel $WIRELESS_CHANNEL"
elif [ "$WIRELESS_AUTO_Channel" ]; then
WIRELESS_OPTS="$WIRELESS_OPTS channel $WIRELESS_AUTO_Channel"
fi
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if [ "$WIRELESS_FREQUENCY" ]; then
WIRELESS_OPTS="$WIRELESS_OPTS freq $WIRELESS_FREQUENCY"
elif [ "$WIRELESS_AUTO_Frequency" ]; then
WIRELESS_OPTS="$WIRELESS_OPTS freq ${WIRELESS_AUTO_Frequency}G"
fi
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if [ "$WIRELESS_AP" ]; then
WIRELESS_OPTS2="$WIRELESS_OPTS2 ap $WIRELESS_AP"
elif [ "$WIRELESS_AUTO_Address" ]; then
WIRELESS_OPTS2="$WIRELESS_OPTS2 ap $WIRELESS_AUTO_Address"
fi
[ "$WIRELESS_FREQ" ] && WIRELESS_OPTS2="$WIRELESS_OPTS2 freq $WIRELESS_FREQ"
[ "$WIRELESS_RATE" ] && WIRELESS_OPTS2="$WIRELESS_OPTS2 rate $WIRELESS_RATE"
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# Note: WIRELESS_ENC must appear as the last option
[ "$WIRELESS_ENC" -a "${WIRELESS_AUTO_IE:0:3}" != "WPA" ] &&
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WIRELESS_OPTS="$WIRELESS_OPTS key $WIRELESS_ENCMODE $WIRELESS_ENC"
if [ "$WIRELESS_ESSID" -o "$WIRELESS_ENC" ]; then
echo -n "Setting wireless options for ${DEVICE}: "
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ifconfig ${DEVICE} down
iwconfig ${DEVICE} $WIRELESS_OPTS
[ "$WIRELESS_OPTS2" ] && iwconfig ${DEVICE} $WIRELESS_OPTS2
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evaluate_retval
echo
if [ "${WIRELESS_AUTO_IE:0:3}" = "WPA" -a ! -e /var/run/wpa_supplicant/${DEVICE} ]; then
echo -n "Setting WPA options for ${DEVICE}: "
[ "$WIRELESS_AUTO_Authentication_Suites" ] ||
WIRELESS_AUTO_Authentication_Suites=PSK
[ "$WIRELESS_AUTO_Pairwise_Ciphers" ] ||
WIRELESS_AUTO_Pairwise_Ciphers=TKIP
[ "$WIRELESS_AUTO_Group_Cipher" ] ||
WIRELESS_AUTO_Group_Cipher=TKIP
if [ "${WIRELESS_ENC:0:2}" = "s:" ]; then
WPA_PSK=\"${WIRELESS_ENC/s:}\"
else
WPA_PSK=${WIRELESS_ENC}
fi
tmpfile1=`tempfile 2>/dev/null`
cat >> $tmpfile1 << _EOF
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ctrl_interface=/var/run/wpa_supplicant
network={
scan_ssid=0
ssid="$WIRELESS_ESSID"
proto=WPA
key_mgmt=WPA-$WIRELESS_AUTO_Authentication_Suites
pairwise=$WIRELESS_AUTO_Pairwise_Ciphers
group=$WIRELESS_AUTO_Group_Cipher
psk=$WPA_PSK
}
_EOF
wpa_supplicant -Dwext -i${DEVICE} -c $tmpfile1 -B
evaluate_retval
echo
rm -f $tmpfile1
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fi
fi