1#!/bin/sh 2#- 3# ---------------------------------------------------------------------------- 4# "THE BEER-WARE LICENSE" (Revision 42): 5# <erdgeist@erdgeist.org> wrote this file. As long as you retain this notice you 6# can do whatever you want with this stuff. If we meet some day, and you think 7# this stuff is worth it, you can buy me a beer in return Poul-Henning Kamp 8# ---------------------------------------------------------------------------- 9# 10# 11 12# define our bail out shortcut 13exerr () { echo -e "Error: $*" >&2 ; exit 1; } 14print_syntax () { echo -e "Syntax: $0 scan [-d device] [-n node]"; exit 1; } 15 16main() { 17unset node device started bdaddresses retry 18 19# Only one command at the moment is scan (+ add) 20[ "$#" -eq 1 -a "$1" = "scan" ] || print_syntax 21shift 22 23# Get command line options 24while getopts :d:n: arg; do 25 case ${arg} in 26 d) device="$OPTARG";; 27 n) node="$OPTARG";; 28 ?) print_syntax;; 29 esac 30done 31 32# No use running without super user rights 33if [ $( id -u ) -ne 0 ]; then 34 exerr "$0 must modify files that belong to root. Re-run as root." 35fi 36 37known_nodes=$( /usr/sbin/hccontrol read_node_list 2>/dev/null |\ 38 /usr/bin/tail -n +2 | /usr/bin/cut -d ' ' -f 1 ) 39 40# Check if netgraph knows about any HCI nodes 41if ! [ "${known_nodes}" ]; then 42 ng_nodes=$( /usr/sbin/ngctl list 2>/dev/null | \ 43 /usr/bin/grep -o "Name: .* Type: ubt" |/usr/bin/cut -d' ' -f2 ) 44 45 [ "${ng_nodes}" ] || exerr "No Bluetooth host controllers found." 46 47 unset found 48 for n in ${ng_nodes}; do 49 if [ "${n}" = "${node%hci}" ]; then 50 # Found the node but its stack is not set up? Do it now. 51 /usr/sbin/service bluetooth start ${node%hci} || exit 1 52 found="YES" 53 fi 54 done 55 56 # If we have Bluetooth controller nodes without a set up stack, 57 # ask the user if we shall start it up 58 if ! [ "${found}" ]; then 59 printf "No usable Bluetooth host controllers were found.\n" 60 printf "These host controllers exist in the system:\n" 61 printf " %s\n" "${ng_nodes}" 62 prompt="Choose a host controller to set up: [${ng_nodes%% *}]" 63 read -p "${prompt}" node 64 : ${node:="${ng_nodes%% *}"} 65 /usr/sbin/service bluetooth start ${node} || exit 1 66 fi 67 68 # Re-read known nodes 69 known_nodes=$(/usr/sbin/hccontrol read_node_list 2>/dev/null | 70 /usr/bin/tail -n +2 | /usr/bin/cut -d ' ' -f 1 ) 71 72 # check if we succeeded in bringing it up 73 [ "${known_nodes}" ] || exerr "Failed to set up Bluetooth stack" 74fi 75 76# if a node was requested on command line, check if it is there 77if [ "${node}" ]; then 78 unset found 79 for n in ${known_nodes}; do 80 [ "${n}" = "${node}" ] && found="YES" 81 [ "${n}" = "${node}hci" ] && node="${node}hci" && found="YES" 82 done 83 [ "${found}" ] || exerr "Node ${node} not found" 84fi 85 86[ "${node}" ] && node="-n ${node}" 87 88while ! [ "${bdaddresses}" ]; do 89 retry=X${retry} 90 printf "Scanning for new Bluetooth devices (Attempt %d of 5) ... " \ 91 ${#retry} 92 bdaddresses=$( /usr/sbin/hccontrol -N ${node} inquiry 2>/dev/null | 93 /usr/bin/grep -o "BD_ADDR: .*" | /usr/bin/cut -d ' ' -f 2 ) 94 95 # Count entries and, if a device was requested on command line, 96 # try to find it 97 unset found count 98 for bdaddress in ${bdaddresses}; do 99 count=X${count} 100 if [ "${bdaddress}" = "${device}" ]; then 101 found=YES 102 bdaddresses="${device}" 103 count=X 104 break 105 fi 106 done 107 108 # If device was requested on command line but is not found, 109 # or no devices found at all, rescan until retry is exhausted 110 if ! [ "${found}" -o "${count}" -a -z "${device}" ]; then 111 printf "failed.\n" 112 if [ "${#retry}" -eq 5 ]; then 113 [ "${device}" ] && exerr "Device ${device} not found" 114 exerr "No new Bluetooth devices found" 115 fi 116 unset bdaddresses 117 sleep 2 118 continue 119 fi 120 121 [ ${#count} -gt 1 ] && plural=s || plural='' 122 printf "done.\nFound %d new bluetooth device%s " ${#count} ${plural} 123 printf "(now scanning for names):\n" 124 125 # Looping again for the faster feedback 126 unset count 127 for bdaddress in ${bdaddresses}; do 128 count=X${count} 129 bdname=$( /usr/bin/bthost -b "${bdaddress}" 2>/dev/null ) 130 friendlyname=$( /usr/sbin/hccontrol Remote_Name_Request \ 131 ${bdaddress} 2> /dev/null | 132 /usr/bin/grep -o "Name: .*" |/usr/bin/cut -d ' ' -f 2- ) 133 134 # sdpcontrol should be able to pull vendor + product id via sdp 135 printf "[%2d] %s\t\"%s\" (%s)\n" ${#count} "${bdaddress}" \ 136 "${friendlyname}" "${bdname}" 137 138 eval bdaddress_${#count}=\${bdaddress} 139 eval bdname_${#count}=\${bdname} 140 eval friendlyname_${#count}=\${friendlyname} 141 done 142 143 # If a device was pre-selected, do not query the user 144 [ "${device}" ] && topair=1 || unset topair 145 146 # Even if only one device was found, user may chose 0 to rescan 147 while ! [ "${topair}" ]; do 148 prompt="Select device to pair with [1" 149 [ ${#count} -gt 1 ] && prompt="${prompt}-${#count}" 150 read -p "${prompt}, or 0 to rescan]: " topair 151 if ! [ "${topair}" -ge 0 -a "${topair}" -le "${#count}" ] \ 152 2>/dev/null ; then 153 printf "Value out of range: %s.\n" {topair} 154 unset topair 155 fi 156 done 157 158 [ "${topair}" -eq "0" ] && unset bdaddresses retry 159done 160 161eval bdaddress=\${bdaddress_${topair}} 162eval bdname=\${bdname_${topair}} 163eval friendlyname=\${friendlyname_${topair}} 164 165# Do we need to add an entry to /etc/bluetooth/hosts? 166if ! [ "${bdname}" ]; then 167 printf "\nAdding device ${bdaddress} to /etc/bluetooth/hosts.\n" 168 169 while ! [ "${bdname}" ]; do 170 read -p "Enter friendly name. [${friendlyname}]: " _r 171 : ${_r:="${friendlyname}"} 172 173 if [ "${_r}" ]; then 174 # Remove white space and non-friendly characters 175 bdname=$( printf "%s" "${_r}" | tr -c '[:alnum:]-,.' _ ) 176 if [ "${_r}" != "${bdname}" ]; then 177 printf "Notice: Using sanitized name" 178 printf "\"%s\" in /etc/bluetooth/hosts.\n" \ 179 "${bdname}" 180 fi 181 fi 182 done 183 184 printf "%s\t%s\n" "${bdaddress}" "${bdname}" >> /etc/bluetooth/hosts 185fi 186 187# If scanning for the name did not succeed, resort to bdname 188: ${friendlyname:="${bdname}"} 189 190# now over to hcsecd 191 192# Since hcsecd does not allow querying for known devices, we need to 193# check for bdaddr entries manually. 194# 195# Also we cannot really modify the PIN in an existing entry. So we 196# need to prompt the user to manually do it and restart this script 197if ! /usr/sbin/service hcsecd enabled; then 198 printf "\nWarning: hcsecd is not enabled.\n" 199 printf "This daemon manages pairing requests.\n" 200 read -p "Enable hcsecd? [yes]: " _r 201 case "${_r}" in 202 no|n|NO|N|No|nO) ;; 203 *) /usr/sbin/service hcsecd enable;; 204 esac 205fi 206 207secd_config=$( /usr/sbin/sysrc -n hcsecd_config ) 208secd_entries=$( /usr/bin/grep -Eo "bdaddr[[:space:]]+(${bdaddress}|${bdname})" \ 209 ${secd_config} | awk '{ print $2; }' ) 210 211if [ "${secd_entries}" ]; then 212 printf "\nWarning: An entry for device %s is already present in %s.\n" \ 213 ${secd_entries} ${secd_config} 214 printf "To modify pairing information, edit this file and run\n" 215 printf " service hcsecd restart\n" 216 read -p "Continue? [yes]: " _r 217 case "${_r}" in no|n|NO|N|No|nO) exit;; esac 218else 219 printf "\nWriting pairing information description block to %s.\n" \ 220 ${secd_config} 221 printf "(To get PIN, put device in pairing mode first.)\n" 222 read -p "Enter PIN [nopin]: " pin 223 [ "${pin}" ] && pin=\""${pin}"\" || pin="nopin" 224 225 # Write out new hcsecd config block 226 printf "\ndevice {\n\tbdaddr\t%s;\n\tname\t\"%s\";\n\tkey\tnokey\;\n\tpin\t%s\;\n}\n" \ 227 "${bdaddress}" "${friendlyname}" "${pin}" >> ${secd_config} 228 229 # ... and make daemon reload config 230 # TODO: hcsecd should provide a reload hook 231 /usr/sbin/service hcsecd onerestart 232 233 # TODO: we should check if hcsecd succeeded pairing and revert to an 234 # old version of hcsecd.conf so we can undo adding the block above and 235 # retry with a new PIN 236 # also, if there's a way to force devices to re-pair, try this 237fi 238 239# now check for specific services to be provided by the device 240# first up: HID 241 242/usr/sbin/sdpcontrol -a "${bdaddress}" search HID | \ 243 /usr/bin/grep -q "^Record Handle: " || exit 0 244 245printf "\nThis device provides human interface device services.\n" 246read -p "Set it up? [yes]: " _r 247case "${_r}" in 248 no|n|NO|N|No|nO) exit 0;; 249 *);; 250esac 251 252# Here we have found an HID and were asked to set it up 253# NOTE: look out for the two exit 0 above if you extend this script 254 255if ! /usr/sbin/service bthidd enabled; then 256 printf "\nWarning: bthidd is not enabled." 257 printf "\nThis daemon manages Bluetooth HID devices.\n" 258 read -p "Enable bthidd? [yes]: " _r 259 case "${_r}" in 260 no|n|NO|N|No|nO) ;; 261 *) /usr/sbin/service bthidd enable;; 262 esac 263fi 264 265# Check if bthidd already knows about this device 266bthidd_known=$( /usr/sbin/bthidcontrol -a "${bdaddress}" known | \ 267 /usr/bin/grep "${bdaddress}" ) 268 269if [ "${bthidd_known}" ]; then 270 printf "Notice: Device %s already known to bthidd.\n" "${bdaddress}" 271 return 0 272fi 273 274bthidd_config=$( /usr/sbin/sysrc -n bthidd_config ) 275printf "Writing HID descriptor block to %s ... " "${bthidd_config}" 276/usr/sbin/bthidcontrol -a "${bdaddress}" query >> "${bthidd_config}" 277 278# Re-read config to see if we succeeded adding the device 279bthidd_known=$( /usr/sbin/bthidcontrol -a "${bdaddress}" known | \ 280 grep "${bdaddress}" ) 281if ! [ "${bthidd_known}" ]; then 282 printf "failed.\n" 283else 284 printf "success.\nTo re-read its config, bthidd must be restarted.\n" 285 printf "Warning: If a Bluetooth keyboard is being used, the connection" 286 printf "might be lost.\n" 287 printf "It can be manually restarted later with\n" 288 printf " service bthidd restart\n" 289 read -p "Restart bthidd now? [yes]: " _r 290 case "${_r}" in 291 no|n|NO|N|No|nO) ;; 292 *) /usr/sbin/service bthidd onerestart;; 293 esac 294fi 295 296} 297 298# After function definitions, main() can use them 299main "$@" 300exit 0 301 302# TODO 303# * If device is a keyboard, offer a text entry test field and if it does 304# not succeed, leave some clues for debugging (i.e. if the node responds 305# to pings, maybe switch keyboard on/off, etc) 306# * Same if device is a mouse, i.e. hexdump /dev/sysmouse. 307# * If device offers DUN profiles, ask the user if an entry in 308# /etc/ppp/ppp.conf should be created 309# * If OPUSH or SPP is offered, refer to the respective man pages to give 310# some clues how to continue 311