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 uwb_rc=$(readlink -f $dev/uwb_rc)
84 if cat $uwb_rc/beacon | grep -q -- "-1"
86 echo 13 0 > $uwb_rc/beacon
87 echo I: started beaconing on ch 13 on $(basename $uwb_rc) >&2
89 echo $host_CHID > $dev/wusb_chid
90 echo I: started host $(basename $dev) >&2
94 for dev in ${2:-$hdevs}
96 echo 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > $dev/wusb_chid
97 echo I: stopped host $(basename $dev) >&2
98 uwb_rc=$(readlink -f $dev/uwb_rc)
99 echo -1 | cat > $uwb_rc/beacon
100 echo I: stopped beaconing on $(basename $uwb_rc) >&2
105 for dev in ${2:-$devs}; do
106 echo "${4:-$host_name}" > $dev/wusb_host_name
107 echo "${3:-$host_band_group}" > $dev/wusb_host_band_groups
108 echo ${2:-$host_CHID} > $dev/wusb_chid
112 for dev in ${2:-$devs}
118 for dev in ${2:-$devs}; do
120 CDID="$(head --bytes=16 /dev/urandom | od -tx1 -An)"
121 CK="$(head --bytes=16 /dev/urandom | od -tx1 -An)"
122 echo "$CDID" > $dev/wusb_cdid
123 echo "$CK" > $dev/wusb_ck
126 echo "CHID: $(cat $dev/wusb_chid)"
135 echo "E: Unknown usage" 1>&2