6 progname=$(basename $0)
10 Usage: $progname COMMAND DEVICEs [ARGS]
12 Command for manipulating the pairing/authentication credentials of a
13 Wireless USB device that supports wired-mode Cable-Based-Association.
15 Works in conjunction with the wusb-cba.ko driver from http://linuxuwb.org.
20 sysfs path to the device to authenticate; for example, both this
23 /sys/devices/pci0000:00/0000:00:1d.7/usb1/1-4/1-4.4/1-4.4:1.1
24 /sys/bus/usb/drivers/wusb-cbaf/1-4.4:1.1
30 Start a WUSB host controller (by setting up a CHID)
32 set-chid DEVICE HOST-CHID HOST-BANDGROUP HOST-NAME
34 Sets host information in the device; after this you can call the
35 get-cdid to see how does this device report itself to us.
39 Get the device ID associated to the HOST-CHDI we sent with
40 'set-chid'. We might not know about it.
44 If we allow the device to connect, set a random new CDID and CK
45 (connection key). Device saves them for the next time it wants to
46 connect wireless. We save them for that next time also so we can
47 authenticate the device (when we see the CDID he uses to id
48 itself) and the CK to crypto talk to it.
50 CHID is always 16 hex bytes in 'XX YY ZZ...' form
51 BANDGROUP is almost always 0001
55 You can default most arguments to '' to get a sane value:
57 $ $progname set-chid '' '' '' "My host name"
61 $ $progname set-chid '' '' '' "My host name"
62 $ $progname get-cdid ''
70 # FIXME: CHID should come from a database :), band group from the host
71 host_CHID="00 11 22 33 44 55 66 77 88 99 aa bb cc dd ee ff"
72 host_band_group="0001"
75 devs="$(echo /sys/bus/usb/drivers/wusb-cbaf/[0-9]*)"
76 hdevs="$(for h in /sys/class/uwb_rc/*/wusbhc; do readlink -f $h; done)"
81 for dev in ${2:-$hdevs}
83 echo $host_CHID > $dev/wusb_chid
84 echo I: started host $(basename $dev) >&2
88 for dev in ${2:-$hdevs}
90 echo 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > $dev/wusb_chid
91 echo I: stopped host $(basename $dev) >&2
96 for dev in ${2:-$devs}; do
97 echo "${4:-$host_name}" > $dev/wusb_host_name
98 echo "${3:-$host_band_group}" > $dev/wusb_host_band_groups
99 echo ${2:-$host_CHID} > $dev/wusb_chid
103 for dev in ${2:-$devs}
109 for dev in ${2:-$devs}; do
111 CDID="$(head --bytes=16 /dev/urandom | od -tx1 -An)"
112 CK="$(head --bytes=16 /dev/urandom | od -tx1 -An)"
113 echo "$CDID" > $dev/wusb_cdid
114 echo "$CK" > $dev/wusb_ck
117 echo "CHID: $(cat $dev/wusb_chid)"
126 echo "E: Unknown usage" 1>&2