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# Uses wireless_tools, to check for association to a network.
# wep_check interface [timeout]
wep_check()
{
INTERFACE=$1; TIMEOUT=$2
[[ -z "$TIMEOUT" ]] && TIMEOUT=15
let timeout=0
while [[ $timeout -ne $TIMEOUT ]]; do
bssid=`iwgetid $INTERFACE -ra`
[[ ! "$bssid" = "00:00:00:00:00:00" ]] && return 0
sleep 1
let timeout++
done
return 1
}
# Check if a particular network is within range
# find_essid interface essid
find_essid()
{
INTERFACE=$1; ESSID=$2; RETRIES=5
try=0;
while [[ $try -ne $RETRIES ]]; do
if iwlist $INTERFACE scan|sed "s/ESSID://g"|grep -q "\"$ESSID\""; then
return 0 # network found
fi
sleep 1
let try++
done
return 1
}
# Return a filename containing a list of network ESSID's found.
# list_networks interface
list_networks()
{
# temp file used, as keeping ESSID's with spaces in their name in arrays
# is hard, obscure and kinda nasty. This is simpler and clearer.
[[ -z "$1" ]] && return 1
essids=$(mktemp /tmp/essid.XXXXX)
let try=0;
RETRIES=6;
while [[ $try -ne $RETRIES ]]; do
iwlist $1 scan 2> /dev/null|grep ESSID|sed 's/.*ESSID:"\([^"]\+\)".*/\1/' > $essids
sleep 0.5; let try++
done
sort -u $essids -o $essids
# File of 0 length, ie. no ssid's.
if [[ ! -s $essids ]]; then
return 1
fi
echo $essids
return 0
}
# vim: set ts=4 et sw=4 ft=sh:
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