net/travelmate/files/travelmate.sh

   1 #!/bin/sh
   2 # travelmate, a wlan connection manager for travel router
   3 # written by Dirk Brenken (dev@brenken.org)
   4
   5 # This is free software, licensed under the GNU General Public License v3.
   6 # You should have received a copy of the GNU General Public License
   7 # along with this program. If not, see <http://www.gnu.org/licenses/>.
   8
   9 # (s)hellcheck exceptions
  10 # shellcheck disable=1091 disable=2039 disable=2143 disable=2181 disable=2188
  11
  12 # set initial defaults
  13 #
  14 LC_ALL=C
  15 PATH="/usr/sbin:/usr/bin:/sbin:/bin"
  16 trm_ver="1.5.3"
  17 trm_enabled=0
  18 trm_debug=0
  19 trm_iface="trm_wwan"
  20 trm_captive=1
  21 trm_proactive=1
  22 trm_netcheck=0
  23 trm_autoadd=0
  24 trm_captiveurl="http://captive.apple.com"
  25 trm_scanbuffer=1024
  26 trm_minquality=35
  27 trm_maxretry=5
  28 trm_maxwait=30
  29 trm_timeout=60
  30 trm_listexpiry=0
  31 trm_radio=""
  32 trm_connection=""
  33 trm_rtfile="/tmp/trm_runtime.json"
  34 trm_wifi="$(command -v wifi)"
  35 trm_wificmd="reload"
  36 trm_fetch="$(command -v uclient-fetch)"
  37 trm_iwinfo="$(command -v iwinfo)"
  38 trm_wpa="$(command -v wpa_supplicant)"
  39 trm_logger="$(command -v logger)"
  40 trm_action="${1:-"start"}"
  41 trm_pidfile="/var/run/travelmate.pid"
  42
  43 # load travelmate environment
  44 #
  45 f_env()
  46 {
  47         local IFS check wpa_checks
  48
  49         # (re-)initialize global list variables
  50         #
  51         unset trm_devlist trm_stalist trm_radiolist trm_active_sta
  52
  53         # get system information
  54         #
  55         trm_sysver="$(ubus -S call system board 2>/dev/null | jsonfilter -e '@.model' -e '@.release.description' | \
  56                 awk 'BEGIN{ORS=", "}{print $0}' | awk '{print substr($0,1,length($0)-2)}')"
  57
  58         # load config and check 'enabled' option
  59         #
  60         config_cb()
  61         {
  62                 local name="${1}" type="${2}"
  63                 if [ "${name}" = "travelmate" ] && [ "${type}" = "global" ]
  64                 then
  65                         option_cb()
  66                         {
  67                                 local option="${1}" value="${2}"
  68                                 eval "${option}=\"${value}\""
  69                         }
  70                 else
  71                         option_cb()
  72                         {
  73                                 return 0
  74                         }
  75                 fi
  76         }
  77         config_load travelmate
  78
  79         if [ "${trm_enabled}" -ne 1 ]
  80         then
  81                 f_log "info" "travelmate is currently disabled, please set 'trm_enabled' to '1' to use this service"
  82                 > "${trm_pidfile}"
  83                 exit 0
  84         fi
  85
  86         # get wpa_supplicant capabilities
  87         #
  88         wpa_checks="eap sae owe"
  89         for check in ${wpa_checks}
  90         do
  91                 if [ -x "${trm_wpa}" ]
  92                 then
  93                         eval "trm_${check}check=\"$("${trm_wpa}" -v${check} >/dev/null 2>&1; printf "%u" "${?}")\""
  94                 else
  95                         eval "trm_${check}check=\"1\""
  96                 fi
  97         done
  98
  99         # get wifi reconf capabilities
 100         #
 101         if [ -n "$(grep -F "reconf" "${trm_wifi}" 2>/dev/null)" ]
 102         then
 103                 trm_wificmd="reconf"
 104         fi
 105
 106         # enable 'disabled' wifi devices
 107         #
 108         config_load wireless
 109         config_foreach f_prepdev wifi-device
 110         if [ -n "$(uci -q changes "wireless")" ]
 111         then
 112                 uci_commit "wireless"
 113                 "${trm_wifi}" "${trm_wificmd}"
 114                 sleep $((trm_maxwait/6))
 115         fi
 116
 117         # validate input ranges
 118         #
 119         if [ "${trm_minquality}" -lt 20 ] || [ "${trm_minquality}" -gt 80 ]
 120         then
 121                 trm_minquality=35
 122         fi
 123         if [ "${trm_listexpiry}" -lt 0 ] || [ "${trm_listexpiry}" -gt 300 ]
 124         then
 125                 trm_listexpiry=0
 126         fi
 127         if [ "${trm_maxretry}" -lt 1 ] || [ "${trm_maxretry}" -gt 10 ]
 128         then
 129                 trm_maxretry=5
 130         fi
 131         if [ "${trm_maxwait}" -lt 20 ] || [ "${trm_maxwait}" -gt 40 ] || [ "${trm_maxwait}" -ge "${trm_timeout}" ]
 132         then
 133                 trm_maxwait=30
 134         fi
 135         if [ "${trm_timeout}" -lt 30 ] || [ "${trm_timeout}" -gt 300 ] || [ "${trm_timeout}" -le "${trm_maxwait}" ]
 136         then
 137                 trm_timeout=60
 138         fi
 139
 140         # load json runtime file
 141         #
 142         json_load_file "${trm_rtfile}" >/dev/null 2>&1
 143         json_select data >/dev/null 2>&1
 144         if [ "${?}" -ne 0 ]
 145         then
 146                 > "${trm_rtfile}"
 147                 json_init
 148                 json_add_object "data"
 149         fi
 150         f_log "debug" "f_env     ::: trm_eapcheck: ${trm_eapcheck:-"-"}, trm_saecheck: ${trm_saecheck:-"-"}, trm_owecheck: ${trm_owecheck:-"-"}, trm_wificmd: ${trm_wificmd}"
 151 }
 152
 153 # trim leading and trailing whitespace characters
 154 #
 155 f_trim()
 156 {
 157         local IFS trim="${1}"
 158
 159         trim="${trim#"${trim%%[![:space:]]*}"}"
 160         trim="${trim%"${trim##*[![:space:]]}"}"
 161         printf '%s' "${trim}"
 162 }
 163
 164 # prepare the 'wifi-device' sections
 165 #
 166 f_prepdev()
 167 {
 168         local IFS disabled config="${1}"
 169
 170         disabled="$(uci_get "wireless" "${config}" "disabled")"
 171         if [ "${disabled}" = "1" ]
 172         then
 173                 uci_set wireless "${config}" disabled 0
 174         fi
 175         f_log "debug" "f_prepdev ::: config: ${config}, disabled: ${disabled:-"-"}"
 176 }
 177
 178 # prepare the 'wifi-iface' sections
 179 #
 180 f_prepif()
 181 {
 182         local IFS mode network radio encryption eaptype disabled config="${1}" proactive="${2}"
 183
 184         mode="$(uci_get "wireless" "${config}" "mode")"
 185         network="$(uci_get "wireless" "${config}" "network")"
 186         radio="$(uci_get "wireless" "${config}" "device")"
 187         encryption="$(uci_get "wireless" "${config}" "encryption")"
 188         eaptype="$(uci_get "wireless" "${config}" "eap_type")"
 189         disabled="$(uci_get "wireless" "${config}" "disabled")"
 190         if [ -n "${config}" ] && [ -n "${radio}" ] && [ -n "${mode}" ] && [ -n "${network}" ]
 191         then
 192                 if [ -z "${trm_radio}" ] && [ -z "$(printf "%s" "${trm_radiolist}" | grep -Fo "${radio}")" ]
 193                 then
 194                         trm_radiolist="$(f_trim "${trm_radiolist} ${radio}")"
 195                 elif [ -n "${trm_radio}" ] && [ -z "${trm_radiolist}" ]
 196                 then
 197                         trm_radiolist="$(f_trim "$(printf "%s" "${trm_radio}" | \
 198                                 awk '{while(match(tolower($0),/radio[0-9]/)){ORS=" ";print substr(tolower($0),RSTART,RLENGTH);$0=substr($0,RSTART+RLENGTH)}}')")"
 199                 fi
 200                 if [ "${mode}" = "sta" ] && [ "${network}" = "${trm_iface}" ]
 201                 then
 202                         if { [ -z "${disabled}" ] || [ "${disabled}" = "0" ]; } && { [ "${proactive}" -eq 0 ] || [ "${trm_ifstatus}" != "true" ]; }
 203                         then
 204                                 uci_set wireless "${config}" disabled 1
 205                         elif [ "${disabled}" = "0" ] && [ "${trm_ifstatus}" = "true" ] && [ "${proactive}" -eq 1 ]
 206                         then
 207                                 if [ -z "${trm_active_sta}" ]
 208                                 then
 209                                         trm_active_sta="${config}"
 210                                 else
 211                                         uci_set wireless "${config}" disabled 1
 212                                 fi
 213                         fi
 214                         if [ -z "${eaptype}" ] || { [ -n "${eaptype}" ] && [ "${trm_eapcheck}" -eq 0 ]; }
 215                         then
 216                                 if { [ "${encryption%-*}" != "sae" ] && [ "${encryption%-*}" != "wpa3" ] && [ "${encryption}" != "owe" ]; } || \
 217                                         { { [ "${encryption%-*}" = "sae" ] || [ "${encryption%-*}" = "wpa3" ]; } && [ "${trm_saecheck}" -eq 0 ]; } || \
 218                                         { [ "${encryption}" = "owe" ] && [ "${trm_owecheck}" -eq 0 ]; }
 219                                 then
 220                                         trm_stalist="$(f_trim "${trm_stalist} ${config}-${radio}")"
 221                                 fi
 222                         fi
 223                 fi
 224         fi
 225         f_log "debug" "f_prepif  ::: config: ${config}, mode: ${mode}, network: ${network}, radio: ${radio}, trm_radio: ${trm_radio:-"-"}, trm_active_sta: ${trm_active_sta:-"-"}, proactive: ${proactive}, disabled: ${disabled}"
 226 }
 227
 228 # check net status
 229 #
 230 f_net()
 231 {
 232         local IFS result
 233
 234         result="$(${trm_fetch} --timeout=$((trm_maxwait/6)) "${trm_captiveurl}" -O /dev/null 2>&1 | \
 235                 awk '/^Failed to redirect|^Redirected/{printf "%s" "net cp \047"$NF"\047";exit}/^Download completed/{printf "%s" "net ok";exit}/^Failed|Connection error/{printf "%s" "net nok";exit}')"
 236         printf "%s" "${result}"
 237         f_log "debug" "f_net     ::: fetch: ${trm_fetch}, timeout: $((trm_maxwait/6)), url: ${trm_captiveurl}, result: ${result}"
 238 }
 239
 240 # check interface status
 241 #
 242 f_check()
 243 {
 244         local IFS ifname radio dev_status config sta_essid sta_bssid result uci_essid uci_bssid login_command login_command_args wait_time=1 mode="${1}" status="${2:-"false"}" cp_domain="${3:-"false"}"
 245
 246         if [ "${mode}" != "initial" ] && [ "${mode}" != "dev" ] && [ "${status}" = "false" ]
 247         then
 248                 "${trm_wifi}" "${trm_wificmd}"
 249                 sleep $((trm_maxwait/6))
 250         fi
 251
 252         while [ "${wait_time}" -le "${trm_maxwait}" ]
 253         do
 254                 dev_status="$(ubus -S call network.wireless status 2>/dev/null)"
 255                 if [ -n "${dev_status}" ]
 256                 then
 257                         if [ "${mode}" = "dev" ]
 258                         then
 259                                 if [ "${trm_ifstatus}" != "${status}" ]
 260                                 then
 261                                         trm_ifstatus="${status}"
 262                                         f_jsnup
 263                                 fi
 264                                 for radio in ${trm_radiolist}
 265                                 do
 266                                         result="$(printf "%s" "${dev_status}" | jsonfilter -l1 -e "@.${radio}.up")"
 267                                         if [ "${result}" = "true" ] && [ -z "$(printf "%s" "${trm_devlist}" | grep -Fo "${radio}")" ]
 268                                         then
 269                                                 trm_devlist="$(f_trim "${trm_devlist} ${radio}")"
 270                                         fi
 271                                 done
 272                                 if [ "${trm_devlist}" = "${trm_radiolist}" ] || [ "${wait_time}" -eq "${trm_maxwait}" ]
 273                                 then
 274                                         ifname="${trm_devlist}"
 275                                         break
 276                                 else
 277                                         unset trm_devlist
 278                                 fi
 279                         elif [ "${mode}" = "rev" ]
 280                         then
 281                                 break
 282                         else
 283                                 ifname="$(printf "%s" "${dev_status}" | jsonfilter -l1 -e '@.*.interfaces[@.config.mode="sta"].ifname')"
 284                                 if [ -n "${ifname}" ]
 285                                 then
 286                                         trm_ifquality="$(${trm_iwinfo} "${ifname}" info 2>/dev/null | awk -F "[ ]" '/Link Quality:/{split($NF,var0,"/");printf "%i\n",(var0[1]*100/var0[2])}')"
 287                                         if [ "${mode}" = "initial" ] && [ "${trm_captive}" -eq 1 ]
 288                                         then
 289                                                 result="$(f_net)"
 290                                                 if [ "${cp_domain}" = "true" ]
 291                                                 then
 292                                                         cp_domain="$(printf "%s" "${result}" | awk -F "[\\'| ]" '/^net cp/{printf "%s" $4}')"
 293                                                         uci_essid="$(printf "%s" "${dev_status}" | jsonfilter -l1 -e '@.*.interfaces[@.config.mode="sta"].config.ssid')"
 294                                                         uci_essid="${uci_essid//[^[:alnum:]_]/_}"
 295                                                         uci_bssid="$(printf "%s" "${dev_status}" | jsonfilter -l1 -e '@.*.interfaces[@.config.mode="sta"].config.bssid')"
 296                                                         uci_bssid="${uci_bssid//[^[:alnum:]_]/_}"
 297                                                 fi
 298                                         fi
 299                                         if [ "${trm_ifquality}" -ge "${trm_minquality}" ] && [ "${result}" != "net nok" ]
 300                                         then
 301                                                 trm_ifstatus="$(ubus -S call network.interface dump 2>/dev/null | jsonfilter -l1 -e "@.interface[@.device=\"${ifname}\"].up")"
 302                                                 if [ "${trm_ifstatus}" = "true" ]
 303                                                 then
 304                                                         if [ "${mode}" = "sta" ] && [ "${trm_captive}" -eq 1 ]
 305                                                         then
 306                                                                 while true
 307                                                                 do
 308                                                                         result="$(f_net)"
 309                                                                         cp_domain="$(printf "%s" "${result}" | awk -F "[\\'| ]" '/^net cp/{printf "%s" $4}')"
 310                                                                         uci_essid="$(printf "%s" "${dev_status}" | jsonfilter -l1 -e '@.*.interfaces[@.config.mode="sta"].config.ssid')"
 311                                                                         uci_essid="${uci_essid//[^[:alnum:]_]/_}"
 312                                                                         uci_bssid="$(printf "%s" "${dev_status}" | jsonfilter -l1 -e '@.*.interfaces[@.config.mode="sta"].config.bssid')"
 313                                                                         uci_bssid="${uci_bssid//[^[:alnum:]_]/_}"
 314                                                                         if [ "${trm_netcheck}" -eq 1 ] && [ "${result}" = "net nok" ]
 315                                                                         then
 316                                                                                 trm_ifstatus="${status}"
 317                                                                                 f_jsnup
 318                                                                                 break 2
 319                                                                         fi
 320                                                                         if [ -z "${cp_domain}" ] || [ -n "$(uci_get "dhcp" "@dnsmasq[0]" "rebind_domain" | grep -Fo "${cp_domain}")" ]
 321                                                                         then
 322                                                                                 break
 323                                                                         fi
 324                                                                         uci -q add_list dhcp.@dnsmasq[0].rebind_domain="${cp_domain}"
 325                                                                         f_log "info" "captive portal domain '${cp_domain}' added to to dhcp rebind whitelist"
 326                                                                         if [ -z "$(uci_get "travelmate" "${trm_radio}_${uci_essid}_${uci_bssid}")" ]
 327                                                                         then
 328                                                                                 uci_add travelmate "login" "${trm_radio}_${uci_essid}_${uci_bssid}"
 329                                                                                 uci_set travelmate "${trm_radio}_${uci_essid}_${uci_bssid}" "command" "none"
 330                                                                                 f_log "info" "captive portal login section '${trm_radio}_${uci_essid}_${uci_bssid}' added to travelmate config section"
 331                                                                         fi
 332                                                                 done
 333                                                                 if [ -n "$(uci -q changes "dhcp")" ]
 334                                                                 then
 335                                                                         uci_commit "dhcp"
 336                                                                         /etc/init.d/dnsmasq reload
 337                                                                 fi
 338                                                                 if [ -n "$(uci -q changes "travelmate")" ]
 339                                                                 then
 340                                                                         uci_commit "travelmate"
 341                                                                 fi
 342                                                         fi
 343                                                         if [ -n "${cp_domain}" ] && [ "${cp_domain}" != "false" ] && [ -n "${uci_essid}" ] && [ "${trm_captive}" -eq 1 ]
 344                                                         then
 345                                                                 trm_connection="${result:-"-"}/${trm_ifquality}"
 346                                                                 f_jsnup
 347                                                                 login_command="$(uci_get "travelmate" "${trm_radio}_${uci_essid}_${uci_bssid}" "command")"
 348                                                                 if [ -x "${login_command}" ]
 349                                                                 then
 350                                                                         login_command_args="$(uci_get "travelmate" "${trm_radio}_${uci_essid}_${uci_bssid}" "command_args")"
 351                                                                         "${login_command}" ${login_command_args} >/dev/null 2>&1
 352                                                                         rc=${?}
 353                                                                         f_log "info" "captive portal login '${login_command:0:40} ${login_command_args:0:20}' for '${cp_domain}' has been executed with rc '${rc}'"
 354                                                                         if [ "${rc}" -eq 0 ]
 355                                                                         then
 356                                                                                 result="$(f_net)"
 357                                                                         fi
 358                                                                 fi
 359                                                         fi
 360                                                         trm_connection="${result:-"-"}/${trm_ifquality}"
 361                                                         f_jsnup
 362                                                         break
 363                                                 fi
 364                                         elif [ -n "${trm_connection}" ]
 365                                         then
 366                                                 sta_essid="$(printf "%s" "${dev_status}" | jsonfilter -l1 -e '@.*.interfaces[@.config.mode="sta"].*.ssid')"
 367                                                 sta_bssid="$(printf "%s" "${dev_status}" | jsonfilter -l1 -e '@.*.interfaces[@.config.mode="sta"].*.bssid')"
 368                                                 if [ "${trm_ifquality}" -lt "${trm_minquality}" ]
 369                                                 then
 370                                                         unset trm_connection
 371                                                         trm_ifstatus="${status}"
 372                                                         f_log "info" "uplink '${sta_essid:-"-"}/${sta_bssid:-"-"}' is out of range (${trm_ifquality}/${trm_minquality})"
 373                                                 elif [ "${trm_netcheck}" -eq 1 ] && [ "${result}" = "net nok" ]
 374                                                 then
 375                                                         unset trm_connection
 376                                                         trm_ifstatus="${status}"
 377                                                         f_log "info" "uplink '${sta_essid:-"-"}/${sta_bssid:-"-"}' has no internet (${result})"
 378                                                 fi
 379                                                 f_jsnup
 380                                                 break
 381                                         elif [ "${mode}" = "initial" ]
 382                                         then
 383                                                 f_jsnup
 384                                                 break
 385                                         fi
 386                                 elif [ -n "${trm_connection}" ]
 387                                 then
 388                                         unset trm_connection
 389                                         trm_ifstatus="${status}"
 390                                         f_jsnup
 391                                         break
 392                                 elif [ "${mode}" = "initial" ]
 393                                 then
 394                                         f_jsnup
 395                                         break
 396                                 fi
 397                         fi
 398                 fi
 399                 wait_time=$((wait_time+1))
 400                 sleep 1
 401         done
 402         f_log "debug" "f_check   ::: mode: ${mode}, name: ${ifname:-"-"}, status: ${trm_ifstatus}, connection: ${trm_connection:-"-"}, wait: ${wait_time}, max_wait: ${trm_maxwait}, min_quality: ${trm_minquality}, captive: ${trm_captive}, netcheck: ${trm_netcheck}"
 403 }
 404
 405 # update runtime information
 406 #
 407 f_jsnup()
 408 {
 409         local IFS config d1 d2 d3 last_date last_station sta_iface sta_radio sta_essid sta_bssid last_status dev_status wpa_status status="${trm_ifstatus}" faulty_list faulty_station="${1}"
 410
 411         dev_status="$(ubus -S call network.wireless status 2>/dev/null)"
 412         if [ -n "${dev_status}" ]
 413         then
 414                 config="$(printf "%s" "${dev_status}" | jsonfilter -l1 -e '@.*.interfaces[@.config.mode="sta"].section')"
 415                 if [ -n "${config}" ]
 416                 then
 417                         sta_iface="$(uci_get "wireless" "${config}" "network")"
 418                         sta_radio="$(uci_get "wireless" "${config}" "device")"
 419                         sta_essid="$(uci_get "wireless" "${config}" "ssid")"
 420                         sta_bssid="$(uci_get "wireless" "${config}" "bssid")"
 421                 fi
 422         fi
 423
 424         json_get_var last_date "last_rundate"
 425         json_get_var last_station "station_id"
 426         if [ "${status}" = "true" ]
 427         then
 428                 status="connected (${trm_connection:-"-"})"
 429                 json_get_var last_status "travelmate_status"
 430                 if [ "${last_status}" = "running / not connected" ] || [ "${last_station}" != "${sta_radio:-"-"}/${sta_essid:-"-"}/${sta_bssid:-"-"}" ]
 431                 then
 432                         last_date="$(date "+%Y.%m.%d-%H:%M:%S")"
 433                 fi
 434         elif [ "${status}" = "error" ]
 435         then
 436                 unset trm_connection
 437                 status="program error"
 438         else
 439                 unset trm_connection
 440                 status="running / not connected"
 441         fi
 442         if [ -z "${last_date}" ]
 443         then
 444                 last_date="$(date "+%Y.%m.%d-%H:%M:%S")"
 445         fi
 446
 447         json_get_var faulty_list "faulty_stations"
 448         if [ -n "${faulty_list}" ] && [ "${trm_listexpiry}" -gt 0 ]
 449         then
 450                 d1="$(date -d "${last_date}" "+%s")"
 451                 d2="$(date "+%s")"
 452                 d3=$(((d2 - d1)/60))
 453                 if [ "${d3}" -ge "${trm_listexpiry}" ]
 454                 then
 455                         faulty_list=""
 456                 fi
 457         fi
 458
 459         if [ -n "${faulty_station}" ]
 460         then
 461                 if [ -z "$(printf "%s" "${faulty_list}" | grep -Fo "${faulty_station}")" ]
 462                 then
 463                         faulty_list="$(f_trim "${faulty_list} ${faulty_station}")"
 464                         last_date="$(date "+%Y.%m.%d-%H:%M:%S")"
 465                 fi
 466         fi
 467
 468         if [ "${trm_eapcheck}" -eq 0 ]
 469         then
 470                 wpa_status="EAP"
 471         else
 472                 wpa_status="-"
 473         fi
 474         if [ "${trm_saecheck}" -eq 0 ]
 475         then
 476                 wpa_status="${wpa_status}/SAE"
 477         else
 478                 wpa_status="${wpa_status}/-"
 479         fi
 480         if [ "${trm_owecheck}" -eq 0 ]
 481         then
 482                 wpa_status="${wpa_status}/OWE"
 483         else
 484                 wpa_status="${wpa_status}/-"
 485         fi
 486         json_add_string "travelmate_status" "${status}"
 487         json_add_string "travelmate_version" "${trm_ver}"
 488         json_add_string "station_id" "${sta_radio:-"-"}/${sta_essid:-"-"}/${sta_bssid:-"-"}"
 489         json_add_string "station_interface" "${sta_iface:-"-"}"
 490         json_add_string "faulty_stations" "${faulty_list}"
 491         json_add_string "wpa_capabilities" "${wpa_status:-"-"}"
 492         json_add_string "last_rundate" "${last_date}"
 493         json_add_string "system" "${trm_sysver}"
 494         json_dump > "${trm_rtfile}"
 495         f_log "debug" "f_jsnup   ::: config: ${config:-"-"}, status: ${status:-"-"}, sta_iface: ${sta_iface:-"-"}, sta_radio: ${sta_radio:-"-"}, sta_essid: ${sta_essid:-"-"}, sta_bssid: ${sta_bssid:-"-"}, faulty_list: ${faulty_list:-"-"}, list_expiry: ${trm_listexpiry}"
 496 }
 497
 498 # write to syslog
 499 #
 500 f_log()
 501 {
 502         local IFS class="${1}" log_msg="${2}"
 503
 504         if [ -n "${log_msg}" ] && { [ "${class}" != "debug" ] || [ "${trm_debug}" -eq 1 ]; }
 505         then
 506                 if [ -x "${trm_logger}" ]
 507                 then
 508                         "${trm_logger}" -p "${class}" -t "travelmate-${trm_ver}[${$}]" "${log_msg}"
 509                 else
 510                         printf "%s %s %s\\n" "${class}" "travelmate-${trm_ver}[${$}]" "${log_msg}"
 511                 fi
 512                 if [ "${class}" = "err" ]
 513                 then
 514                         trm_ifstatus="error"
 515                         f_jsnup
 516                         > "${trm_pidfile}"
 517                         exit 1
 518                 fi
 519         fi
 520 }
 521
 522 # main function for connection handling
 523 #
 524 f_main()
 525 {
 526         local IFS cnt dev config spec scan_list scan_essid scan_bssid scan_open scan_quality uci_essid cfg_essid faulty_list
 527         local station_id sta sta_essid sta_bssid sta_radio sta_iface active_essid active_bssid active_radio
 528
 529         f_check "initial" "false" "true"
 530         f_log "debug" "f_main    ::: status: ${trm_ifstatus}, proactive: ${trm_proactive}"
 531         if [ "${trm_ifstatus}" != "true" ] || [ "${trm_proactive}" -eq 1 ]
 532         then
 533                 config_load wireless
 534                 config_foreach f_prepif wifi-iface ${trm_proactive}
 535                 if [ "${trm_ifstatus}" = "true" ] && [ -n "${trm_active_sta}" ] && [ "${trm_proactive}" -eq 1 ]
 536                 then
 537                         json_get_var station_id "station_id"
 538                         active_radio="${station_id%%/*}"
 539                         active_essid="${station_id%/*}"
 540                         active_essid="${active_essid#*/}"
 541                         active_bssid="${station_id##*/}"
 542                         f_check "dev" "true"
 543                         f_log "debug" "f_main    ::: active_radio: ${active_radio}, active_essid: \"${active_essid}\", active_bssid: ${active_bssid:-"-"}"
 544                 else
 545                         uci_commit "wireless"
 546                         f_check "dev"
 547                 fi
 548                 json_get_var faulty_list "faulty_stations"
 549                 f_log "debug" "f_main    ::: iwinfo: ${trm_iwinfo:-"-"}, dev_list: ${trm_devlist:-"-"}, sta_list: ${trm_stalist:0:${trm_scanbuffer}}, faulty_list: ${faulty_list:-"-"}"
 550                 # radio loop
 551                 #
 552                 for dev in ${trm_devlist}
 553                 do
 554                         if [ -z "$(printf "%s" "${trm_stalist}" | grep -o "\\-${dev}")" ]
 555                         then
 556                                 f_log "debug" "f_main    ::: no station on '${dev}' - continue"
 557                                 continue
 558                         fi
 559                         # station loop
 560                         #
 561                         for sta in ${trm_stalist}
 562                         do
 563                                 config="${sta%%-*}"
 564                                 sta_radio="${sta##*-}"
 565                                 sta_essid="$(uci_get "wireless" "${config}" "ssid")"
 566                                 sta_bssid="$(uci_get "wireless" "${config}" "bssid")"
 567                                 sta_iface="$(uci_get "wireless" "${config}" "network")"
 568                                 json_get_var faulty_list "faulty_stations"
 569                                 if [ -n "$(printf "%s" "${faulty_list}" | grep -Fo "${sta_radio}/${sta_essid}/${sta_bssid}")" ]
 570                                 then
 571                                         f_log "debug" "f_main    ::: faulty station '${sta_radio}/${sta_essid}/${sta_bssid:-"-"}' - continue"
 572                                         continue
 573                                 fi
 574                                 if [ "${dev}" = "${active_radio}" ] && [ "${sta_essid}" = "${active_essid}" ] && [ "${sta_bssid:-"-"}" = "${active_bssid}" ]
 575                                 then
 576                                         f_log "debug" "f_main    ::: active station prioritized '${active_radio}/${active_essid}/${active_bssid:-"-"}' - break"
 577                                         break 2
 578                                 fi
 579                                 f_log "debug" "f_main    ::: sta_radio: ${sta_radio}, sta_essid: \"${sta_essid}\", sta_bssid: ${sta_bssid:-"-"}"
 580                                 if [ -z "${scan_list}" ]
 581                                 then
 582                                         scan_list="$("${trm_iwinfo}" "${dev}" scan 2>/dev/null | \
 583                                                 awk 'BEGIN{FS="[[:space:]]"}/Address:/{var1=$NF}/ESSID:/{var2="";for(i=12;i<=NF;i++)if(var2==""){var2=$i}else{var2=var2" "$i};
 584                                                 gsub(/,/,".",var2)}/Quality:/{split($NF,var0,"/")}/Encryption:/{if($NF=="none"){var3="+"}else{var3="-"};printf "%i,%s,%s,%s\n",(var0[1]*100/var0[2]),var1,var2,var3}' | \
 585                                                 sort -rn | awk -v buf="${trm_scanbuffer}" 'BEGIN{ORS=","}{print substr($0,1,buf)}')"
 586                                         f_log "debug" "f_main    ::: scan_radio: ${dev}, scan_buffer: ${trm_scanbuffer}, scan_list: ${scan_list}"
 587                                         if [ -z "${scan_list}" ]
 588                                         then
 589                                                 f_log "debug" "f_main    ::: no scan results on '${dev}' - continue"
 590                                                 continue 2
 591                                         fi
 592                                 fi
 593                                 # scan loop
 594                                 #
 595                                 IFS=","
 596                                 for spec in ${scan_list}
 597                                 do
 598                                         if [ -z "${scan_quality}" ]
 599                                         then
 600                                                 scan_quality="${spec}"
 601                                         elif [ -z "${scan_bssid}" ]
 602                                         then
 603                                                 scan_bssid="${spec}"
 604                                         elif [ -z "${scan_essid}" ]
 605                                         then
 606                                                 scan_essid="${spec}"
 607                                         elif [ -z "${scan_open}" ]
 608                                         then
 609                                                 scan_open="${spec}"
 610                                         fi
 611                                         if [ -n "${scan_quality}" ] && [ -n "${scan_bssid}" ] && [ -n "${scan_essid}" ] && [ -n "${scan_open}" ]
 612                                         then
 613                                                 if [ "${scan_quality}" -ge "${trm_minquality}" ]
 614                                                 then
 615                                                         if { { [ "${scan_essid}" = "\"${sta_essid//,/.}\"" ] && { [ -z "${sta_bssid}" ] || [ "${scan_bssid}" = "${sta_bssid}" ]; } } || \
 616                                                                 { [ "${scan_bssid}" = "${sta_bssid}" ] && [ "${scan_essid}" = "unknown" ]; } } && [ "${dev}" = "${sta_radio}" ]
 617                                                         then
 618                                                                 f_log "debug" "f_main    ::: scan_quality: ${scan_quality}, scan_essid: ${scan_essid}, scan_bssid: ${scan_bssid:-"-"}, scan_open: ${scan_open}"
 619                                                                 if [ -n "${active_radio}" ]
 620                                                                 then
 621                                                                         uci_set "wireless" "${trm_active_sta}" "disabled" "1"
 622                                                                         uci_commit "wireless"
 623                                                                         f_log "debug" "f_main    ::: active uplink connection '${active_radio}/${active_essid}/${active_bssid:-"-"}' terminated"
 624                                                                         unset trm_connection active_radio active_essid active_bssid
 625                                                                 fi
 626                                                                 # retry loop
 627                                                                 #
 628                                                                 cnt=1
 629                                                                 while [ "${cnt}" -le "${trm_maxretry}" ]
 630                                                                 do
 631                                                                         uci_set "wireless" "${config}" "disabled" "0"
 632                                                                         trm_radio="${sta_radio}"
 633                                                                         f_check "sta"
 634                                                                         if [ "${trm_ifstatus}" = "true" ]
 635                                                                         then
 636                                                                                 unset IFS scan_list
 637                                                                                 uci_commit "wireless"
 638                                                                                 f_log "info" "connected to uplink '${sta_radio}/${sta_essid}/${sta_bssid:-"-"}' (${cnt}/${trm_maxretry}, ${trm_sysver})"
 639                                                                                 return 0
 640                                                                         else
 641                                                                                 uci -q revert "wireless"
 642                                                                                 f_check "rev"
 643                                                                                 if [ "${cnt}" -eq "${trm_maxretry}" ]
 644                                                                                 then
 645                                                                                         faulty_station="${sta_radio}/${sta_essid}/${sta_bssid:-"-"}"
 646                                                                                         f_jsnup "${faulty_station}"
 647                                                                                         f_log "info" "uplink disabled '${sta_radio}/${sta_essid}/${sta_bssid:-"-"}' (${cnt}/${trm_maxretry}, ${trm_sysver})"
 648                                                                                         break 2
 649                                                                                 else
 650                                                                                         f_jsnup
 651                                                                                         f_log "info" "can't connect to uplink '${sta_radio}/${sta_essid}/${sta_bssid:-"-"}' (${cnt}/${trm_maxretry}, ${trm_sysver})"
 652                                                                                 fi
 653                                                                         fi
 654                                                                         cnt=$((cnt+1))
 655                                                                         sleep $((trm_maxwait/6))
 656                                                                 done
 657                                                         elif [ "${trm_autoadd}" -eq 1 ] && [ "${scan_open}" = "+" ] && [ "${scan_essid}" != "unknown" ]
 658                                                         then
 659                                                                 cfg_essid="${scan_essid#*\"}"
 660                                                                 cfg_essid="${cfg_essid%\"*}"
 661                                                                 uci_essid="${cfg_essid//[^[:alnum:]_]/_}"
 662                                                                 if [ -z "$(uci_get "wireless" "trm_${uci_essid}")" ]
 663                                                                 then
 664                                                                         uci_add "wireless" "wifi-iface" "trm_${uci_essid}"
 665                                                                         uci_set "wireless" "trm_${uci_essid}" "mode" "sta"
 666                                                                         uci_set "wireless" "trm_${uci_essid}" "network" "${trm_iface}"
 667                                                                         uci_set "wireless" "trm_${uci_essid}" "device" "${sta_radio}"
 668                                                                         uci_set "wireless" "trm_${uci_essid}" "ssid" "${cfg_essid}"
 669                                                                         uci_set "wireless" "trm_${uci_essid}" "encryption" "none"
 670                                                                         uci_set "wireless" "trm_${uci_essid}" "disabled" "1"
 671                                                                         uci_commit "wireless"
 672                                                                         f_log "info" "open uplink '${sta_radio}/${cfg_essid}' added to wireless config"
 673                                                                 fi
 674                                                         fi
 675                                                         unset scan_quality scan_bssid scan_essid scan_open
 676                                                         continue
 677                                                 else
 678                                                         unset scan_quality scan_bssid scan_essid scan_open
 679                                                         continue
 680                                                 fi
 681                                         fi
 682                                 done
 683                                 unset IFS scan_quality scan_bssid scan_essid scan_open
 684                         done
 685                         unset scan_list
 686                 done
 687         fi
 688 }
 689
 690 # source required system libraries
 691 #
 692 if [ -r "/lib/functions.sh" ] && [ -r "/usr/share/libubox/jshn.sh" ]
 693 then
 694         . "/lib/functions.sh"
 695         . "/usr/share/libubox/jshn.sh"
 696 else
 697         f_log "err" "system libraries not found"
 698 fi
 699
 700 # control travelmate actions
 701 #
 702 f_env
 703 while true
 704 do
 705         if [ -z "${trm_action}" ]
 706         then
 707                 rc=0
 708                 while true
 709                 do
 710                         if [ "${rc}" -eq 0 ]
 711                         then
 712                                 f_check "initial"
 713                         fi
 714                         sleep ${trm_timeout} 0
 715                         rc=${?}
 716                         if [ "${rc}" -ne 0 ]
 717                         then
 718                                 f_check "initial"
 719                         fi
 720                         if [ "${rc}" -eq 0 ] || { [ "${rc}" -ne 0 ] && [ "${trm_ifstatus}" = "false" ]; }
 721                         then
 722                                 break
 723                         fi
 724                 done
 725         elif [ "${trm_action}" = "stop" ]
 726         then
 727                 f_log "info" "travelmate instance stopped ::: action: ${trm_action}, pid: $(cat ${trm_pidfile} 2>/dev/null)"
 728                 > "${trm_rtfile}"
 729                 > "${trm_pidfile}"
 730                 exit 0
 731         else
 732                 f_log "info" "travelmate instance started ::: action: ${trm_action}, pid: ${$}"
 733                 unset trm_action
 734         fi
 735         json_cleanup
 736         f_env
 737         f_main
 738 done