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|
#! /bin/bash
#
set -e
progname=$(basename $0)
function help
{
cat <<EOF
Usage: $progname COMMAND DEVICEs [ARGS]
Command for manipulating the pairing/authentication credentials of a
Wireless USB device that supports wired-mode Cable-Based-Association.
Works in conjunction with the wusb-cba.ko driver from http://linuxuwb.org.
DEVICE
sysfs path to the device to authenticate; for example, both this
guys are the same:
/sys/devices/pci0000:00/0000:00:1d.7/usb1/1-4/1-4.4/1-4.4:1.1
/sys/bus/usb/drivers/wusb-cbaf/1-4.4:1.1
COMMAND/ARGS are
start
Start a WUSB host controller (by setting up a CHID)
set-chid DEVICE HOST-CHID HOST-BANDGROUP HOST-NAME
Sets host information in the device; after this you can call the
get-cdid to see how does this device report itself to us.
get-cdid DEVICE
Get the device ID associated to the HOST-CHDI we sent with
'set-chid'. We might not know about it.
set-cc DEVICE
If we allow the device to connect, set a random new CDID and CK
(connection key). Device saves them for the next time it wants to
connect wireless. We save them for that next time also so we can
authenticate the device (when we see the CDID he uses to id
itself) and the CK to crypto talk to it.
CHID is always 16 hex bytes in 'XX YY ZZ...' form
BANDGROUP is almost always 0001
Examples:
You can default most arguments to '' to get a sane value:
$ $progname set-chid '' '' '' "My host name"
A full sequence:
$ $progname set-chid '' '' '' "My host name"
$ $progname get-cdid ''
$ $progname set-cc ''
EOF
}
# Defaults
# FIXME: CHID should come from a database :), band group from the host
host_CHID="00 11 22 33 44 55 66 77 88 99 aa bb cc dd ee ff"
host_band_group="0001"
host_name="Linux-WUSB"
devs="$(echo /sys/bus/usb/drivers/wusb-cbaf/[0-9]*)"
hdevs="$(find /sys -name wusb_chid -printf "%h\n")"
result=0
case $1 in
start)
for dev in ${2:-$hdevs}
do
uwb_rc=$(find $(dirname $(dirname $dev)) -iname uwb_rc:uwb*)
if cat $uwb_rc/uwb_rc/beacon | grep -q "channel: -1"
then
echo 13 0 | cat > $uwb_rc/uwb_rc/beacon
echo I: started beaconing on ch 13 in host $(basename $uwb_rc)
fi
echo $host_CHID | cat > $dev/wusb_chid
echo I: started host $(basename $dev)
done
;;
set-chid)
shift
for dev in ${2:-$devs}
do
echo "${2:-$host_CHID}" "${3:-$host_band_group}" "${4:-$host_name}" \
| cat > $dev/wusb_host_info
done
;;
get-cdid)
for dev in ${2:-$devs}
do
cat $dev/wusb_cdid
done
;;
set-cc)
for dev in ${2:-$devs}
do
shift
CDID="$(head --bytes=16 /dev/urandom | od -tx1 -An)"
CK="$(head --bytes=16 /dev/urandom | od -tx1 -An)"
cat > $dev/wusb_cc <<EOF
CDID:$CDID
CK:$CK
EOF
cat <<EOF
I: CC set
CHID: $host_CHID
CDID:$CDID
CK: $CK
EOF
done
;;
help|h|--help|-h)
help
;;
*)
echo "E: Unknown usage" 1>&2
help 1>&2
result=1
esac
exit $result
|
