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|
#!/bin/bash
#
# $Id: $
# $ManualTag: V0.2 $ ;)
#
# By François TOURDE <francois@tourde.org>, based on work of
# Andrew McMillan, Catalyst IT Ltd,
# (c) 2007 licensed for use under the GPL version 2
#
# Parameters:
# - first form: [<interface>,](start|stop)
# - second form: [<interface>,](<ESSID pattern>),(<WPA-PSK key>)
#
# <interface> Interface to test. If omitted, use INTERFACE variable (from detect.conf)
#
# start|stop If wpa_supplicant is not started, used to start or stop it. Further wpa configs
# will be done using wpa_cli.
#
# <ESSID pattern> A pattern that should match the ESSID we are looking for.
#
# WPA-PSK key A WPA-PSK key, using the format accepted by "iwconfig". This is only applied
# if the pattern match is successful.
#
# Environment variables:
#
# INTERFACE Default interface name to use if not specified
# DEBUGWHEREAMI Turn on debugging output (0 for debug msgs, 1 for execution tracing)
#
# Examples:
# testwpa eth1,start dummy
# set INTERFACE eth1
# testwpa mylan,my_secret_code my_location
# testwpa stop dummy
#
# Turn on execution tracing, for debugging...
[ -n "$DEBUGWHEREAMI" ] && set -o xtrace
[ -n "$DEBUGWHEREAMI" ] && echo "0:$0, 1:$1, 2:$2"
PARAMETERS=${1:-"start"}
WHEREAMILOCK=$LOCKDIR/whereami.started
WPAKEY=""
PATTERN=""
ACTION="test"
INTERFACE=${INTERFACE:-eth0}
[ -n "$DEBUGWHEREAMI" ] && echo "\$1>$1<"
case ${PARAMETERS} in
*,start)
[ -n "$DEBUGWHEREAMI" ] && echo "interface,start"
# First form
INTERFACE="${1/,start}"
ACTION="start"
;;
*,stop)
[ -n "$DEBUGWHEREAMI" ] && echo "interface,stop"
# First form
INTERFACE="${1/,stop}"
ACTION="stop"
;;
start)
[ -n "$DEBUGWHEREAMI" ] && echo "start"
# First form
INTERFACE="${INTERFACE:-eth0}"
ACTION="start"
;;
stop)
[ -n "$DEBUGWHEREAMI" ] && echo "stop"
# First form
INTERFACE="${INTERFACE:-eth0}"
ACTION="stop"
;;
*,*,*)
[ -n "$DEBUGWHEREAMI" ] && echo "interface,essid,wpakey"
# Third form
INTERFACE="${1/,*}"
WPAKEY="${1/*,}"
PATTERN="${1/$INTERFACE,}"
PATTERN="${PATTERN/,$WPAKEY}"
;;
*,*)
[ -n "$DEBUGWHEREAMI" ] && echo "essid,wpakey"
# Second form
PATTERN="${1/,*}"
WPAKEY="${1/*,}"
;;
*)
[ -n "$DEBUGWHEREAMI" ] && echo "essid only!"
# Second form
PATTERN="$1"
;;
esac
# Setup some wpa parms
WPA_IFACE=$INTERFACE
IF_WPA_VERBOSITY=$DEBUGWHEREAMI
# source functions
if [ -f /etc/wpa_supplicant/functions.sh ]; then
. /etc/wpa_supplicant/functions.sh
else
[ -n "$DEBUGWHEREAMI" ] && echo "No /etc/wpa_supplicant/functions.sh usable. Check your WPA installation"
exit 1
fi
# Other wpa parms
WPA_SUP_CONF="-C $WPA_CTRL_DIR"
######################################################
# Utility to do some supplicant operations
######################################################
launch_supplicant()
{
# Run the wpa_supplicant daemon
kill_supplicant
init_wpa_supplicant || exit 1
}
######################################################
# Utility to do some supplicant operations
######################################################
conf_supplicant()
{
# We can call supplicant client to setup link
conf_wpa_supplicant || { kill_supplicant; exit 1;}
}
######################################################
# Utility to do some supplicant operations
######################################################
kill_supplicant()
{
# stop the wpa_supplicant daemon
kill_wpa_supplicant
}
######################################################
# The main task
# Start and stop must return errors, because they're
# not now tips to find network.
#
# wpa_state possible values: WPA_DISCONNECTED,WPA_INACTIVE,WPA_SCANNING,WPA_ASSOCIATING,WPA_ASSOCIATED,
# WPA_4WAY_HANDSHAKE,WPA_GROUP_HANDSHAKE,WPA_COMPLETED
######################################################
case ${ACTION} in
start)
# Launch wpa_supplicant, with standard parms
launch_supplicant $INTERFACE
STATUS=1
;;
stop)
# Stop supplicant
kill_supplicant $INTERFACE
STATUS=1
;;
test)
# Now, we must test link
wpa_cli scan
if wpa_cli scan_results|grep --quiet "$PATTERN"; then
[ -n "$DEBUGWHEREAMI" ] && echo "Found SSID!"
# Starting the link... The following commands must be checked
# for a {OK, FAIL} return message... later :)
NETID=$(wpa_cli add_network)
wpa_cli select_network $NETID
wpa_cli set_network $NETID ssid '"'$PATTERN'"'
wpa_cli set_network $NETID key_mgmt WPA-PSK
wpa_cli set_network $NETID psk '"'$WPAKEY'"'
# Now, we must check network link... following handshaking mechanism
STATUS=-1
while [ $STATUS == -1 ] ; do
STATUS_TEXT=$(wpa_cli status|grep "wpa_state="|sed -e 's/.*=//')
[ -n "$DEBUGWHEREAMI" ] && echo "Connection state: "${STATUS_TEXT}
case ${STATUS_TEXT} in
SCANNING|ASSOCIAT*|*_HANDSHAKE)
sleep 1;
;;
COMPLETED)
[ -n "$DEBUGWHEREAMI" ] && echo "Connection complete"
STATUS=0
;;
*)
[ -n "$DEBUGWHEREAMI" ] && echo "Connection not completed"
STATUS=1
;;
esac
done
else
[ -n "$DEBUGWHEREAMI" ] && echo "SSID not found"
STATUS=1
fi
;;
*)
;;
esac
exit $STATUS
|
