net/travelmate/files/travelmate.sh

   1 #!/bin/sh
   2 # travelmate, a wlan connection manager for travel router
   3 # Copyright (c) 2016-2021 Dirk Brenken (dev@brenken.org)
   4 # This is free software, licensed under the GNU General Public License v3.
   5
   6 # set (s)hellcheck exceptions
   7 # shellcheck disable=1091,2086,3040,3043,3057,3060
   8
   9 export LC_ALL=C
  10 export PATH="/usr/sbin:/usr/bin:/sbin:/bin"
  11 set -o pipefail
  12
  13 trm_ver="2.0.7"
  14 trm_enabled="0"
  15 trm_debug="0"
  16 trm_iface=""
  17 trm_captive="1"
  18 trm_proactive="1"
  19 trm_netcheck="0"
  20 trm_autoadd="0"
  21 trm_randomize="0"
  22 trm_mail="0"
  23 trm_mailpgm="/etc/travelmate/travelmate.mail"
  24 trm_vpnpgm="/etc/travelmate/travelmate.vpn"
  25 trm_minquality="35"
  26 trm_maxretry="3"
  27 trm_maxwait="30"
  28 trm_maxautoadd="5"
  29 trm_maxscan="10"
  30 trm_timeout="60"
  31 trm_opensta="0"
  32 trm_radio=""
  33 trm_connection=""
  34 trm_wpaflags=""
  35 trm_uplinkcfg=""
  36 trm_rtfile="/tmp/trm_runtime.json"
  37 trm_wifi="$(command -v wifi)"
  38 trm_fetch="$(command -v curl)"
  39 trm_iwinfo="$(command -v iwinfo)"
  40 trm_logger="$(command -v logger)"
  41 trm_wpa="$(command -v wpa_supplicant)"
  42 trm_captiveurl="http://detectportal.firefox.com"
  43 trm_useragent="Mozilla/5.0 (Linux x86_64; rv:90.0) Gecko/20100101 Firefox/90.0"
  44 trm_ntpfile="/var/state/travelmate.ntp"
  45 trm_vpnfile="/var/state/travelmate.vpn"
  46 trm_mailfile="/var/state/travelmate.mail"
  47 trm_refreshfile="/var/state/travelmate.refresh"
  48 trm_pidfile="/var/run/travelmate.pid"
  49 trm_action="${1:-"start"}"
  50
  51 # load travelmate environment
  52 #
  53 f_env() {
  54         local check wpa_checks result
  55
  56         if [ "${trm_action}" = "stop" ]; then
  57                 return
  58         fi
  59
  60         unset trm_stalist trm_radiolist trm_uplinklist trm_uplinkcfg trm_wpaflags trm_activesta trm_opensta
  61
  62         trm_sysver="$(ubus -S call system board 2>/dev/null | jsonfilter -q -e '@.model' -e '@.release.description' |
  63                 awk 'BEGIN{RS="";FS="\n"}{printf "%s, %s",$1,$2}')"
  64
  65         config_cb() {
  66                 local name="${1}" type="${2}"
  67
  68                 if [ "${name}" = "travelmate" ] && [ "${type}" = "global" ]; then
  69                         option_cb() {
  70                                 local option="${1}" value="${2}"
  71                                 eval "${option}=\"${value}\""
  72                         }
  73                 elif [ "${name}" = "uplink" ]; then
  74                         if [ "$(uci_get "travelmate.${type}.opensta")" = "1" ]; then
  75                                 eval "trm_opensta=\"$((${trm_opensta:-0} + 1))\""
  76                         fi
  77                 else
  78                         option_cb() {
  79                                 return 0
  80                         }
  81                 fi
  82         }
  83         config_load travelmate
  84
  85         if [ "${trm_enabled}" != "1" ]; then
  86                 f_log "info" "travelmate is currently disabled, please set 'trm_enabled' to '1' to use this service"
  87                 /etc/init.d/travelmate stop
  88         elif [ -z "${trm_iface}" ]; then
  89                 f_log "info" "travelmate is currently not configured, please use the 'Interface Setup' in LuCI or the 'setup' option in CLI"
  90                 /etc/init.d/travelmate stop
  91         elif ! ubus -t "${trm_maxwait}" wait_for network.wireless network.interface."${trm_iface}" >/dev/null 2>&1; then
  92                 f_log "info" "travelmate interface '${trm_iface}' does not appear on ubus, please check your network setup"
  93                 /etc/init.d/travelmate stop
  94         fi
  95
  96         wpa_checks="sae owe eap suiteb192"
  97         for check in ${wpa_checks}; do
  98                 if [ -x "${trm_wpa}" ]; then
  99                         if "${trm_wpa}" -v"${check}" >/dev/null 2>&1; then
 100                                 result="$(f_trim "${result} ${check}: $(f_char 1)")"
 101                         else
 102                                 result="$(f_trim "${result} ${check}: $(f_char 0)")"
 103                         fi
 104                 fi
 105         done
 106         trm_wpaflags="$(printf "%s" "${result}" | awk '{printf "%s %s, %s %s, %s %s, %s %s",$1,$2,$3,$4,$5,$6,$7,$8}')"
 107
 108         config_load wireless
 109         config_foreach f_setdev "wifi-device"
 110         if [ -n "$(uci -q changes "wireless")" ]; then
 111                 uci_commit "wireless"
 112                 f_wifi
 113         fi
 114
 115         json_load_file "${trm_rtfile}" >/dev/null 2>&1
 116
 117         if ! json_select data >/dev/null 2>&1; then
 118                 : >"${trm_rtfile}"
 119                 json_init
 120                 json_add_object "data"
 121         fi
 122         f_log "debug" "f_env    ::: auto_sta: ${trm_opensta:-"-"}, wpa_flags: ${trm_wpaflags}, sys_ver: ${trm_sysver}"
 123 }
 124
 125 # trim helper function
 126 #
 127 f_trim() {
 128         local trim="${1}"
 129
 130         trim="${trim#"${trim%%[![:space:]]*}"}"
 131         trim="${trim%"${trim##*[![:space:]]}"}"
 132         printf "%s" "${trim}"
 133 }
 134
 135 # status helper function
 136 #
 137 f_char() {
 138         local result input="${1}"
 139
 140         if [ "${input}" = "1" ]; then
 141                 result="✔"
 142         else
 143                 result="✘"
 144         fi
 145         printf "%s" "${result}"
 146 }
 147
 148 # wifi helper function
 149 #
 150 f_wifi() {
 151         local status radio radio_up timeout="0"
 152
 153         "${trm_wifi}" reload
 154         for radio in ${trm_radiolist}; do
 155                 while true; do
 156                         if [ "${timeout}" -ge "${trm_maxwait}" ]; then
 157                                 break 2
 158                         fi
 159                         status="$("${trm_wifi}" status 2>/dev/null)"
 160                         if [ "$(printf "%s" "${status}" | jsonfilter -q -l1 -e "@.${radio}.up")" != "true" ] ||
 161                                 [ "$(printf "%s" "${status}" | jsonfilter -q -l1 -e "@.${radio}.pending")" != "false" ]; then
 162                                 if [ "${radio}" != "${radio_up}" ]; then
 163                                         "${trm_wifi}" up "${radio}"
 164                                         radio_up="${radio}"
 165                                 fi
 166                                 timeout="$((timeout + 1))"
 167                                 sleep 1
 168                         else
 169                                 continue 2
 170                         fi
 171                 done
 172         done
 173         if [ "${timeout}" -lt "${trm_maxwait}" ]; then
 174                 sleep "$((trm_maxwait / 6))"
 175                 timeout="$((timeout + (trm_maxwait / 6)))"
 176         fi
 177         f_log "debug" "f_wifi   ::: radio_list: ${trm_radiolist}, radio: ${radio}, timeout: ${timeout}"
 178 }
 179
 180 # vpn helper function
 181 #
 182 f_vpn() {
 183         local rc vpn vpn_service vpn_iface vpn_action="${1}"
 184
 185         vpn="$(f_getval "vpn")"
 186         vpn_service="$(f_getval "vpnservice")"
 187         vpn_iface="$(f_getval "vpniface")"
 188         [ -z "${vpn_action}" ] && { [ "${vpn}" = "1" ] && vpn_action="enable" || vpn_action="disable"; }
 189
 190         if [ -x "${trm_vpnpgm}" ] && [ -n "${vpn_service}" ] && [ -n "${vpn_iface}" ] && [ -f "${trm_ntpfile}" ]; then
 191                 if { [ "${vpn_action}" = "disable" ] && [ -f "${trm_vpnfile}" ]; } ||
 192                         { [ "${vpn}" = "1" ] && [ "${vpn_action}" = "enable" ] && [ ! -f "${trm_vpnfile}" ]; } ||
 193                         { [ "${vpn}" != "1" ] && [ "${vpn_action}" = "enable" ] && [ -f "${trm_vpnfile}" ]; }; then
 194                         "${trm_vpnpgm}" "${vpn}" "${vpn_action}" "${vpn_service}" "${vpn_iface}" >/dev/null 2>&1
 195                         rc="${?}"
 196                 fi
 197                 if [ "${vpn}" = "1" ] && [ "${vpn_action}" = "enable" ] && [ "${rc}" = "0" ]; then
 198                         : >"${trm_vpnfile}"
 199                 elif { [ "${vpn}" != "1" ] || [ "${vpn_action}" = "disable" ]; } && [ -f "${trm_vpnfile}" ]; then
 200                         rm -f "${trm_vpnfile}"
 201                 fi
 202                 [ -n "${rc}" ] && f_jsnup
 203         fi
 204         f_log "debug" "f_vpn    ::: enabled: ${vpn:-"-"}, action: ${vpn_action}, service: ${vpn_service:-"-"}, iface: ${vpn_iface:-"-"}, rc: ${rc:-"-"}, program: ${trm_vpnpgm}"
 205 }
 206
 207 # mac helper function
 208 #
 209 f_mac() {
 210         local result ifname macaddr action="${1}" section="${2}"
 211
 212         if [ "${action}" = "set" ]; then
 213                 macaddr="$(f_getval "macaddr")"
 214                 if [ -n "${macaddr}" ]; then
 215                         result="${macaddr}"
 216                         uci_set "wireless" "${section}" "macaddr" "${result}"
 217                 elif [ "${trm_randomize}" = "1" ]; then
 218                         result="$(hexdump -n6 -ve '/1 "%.02X "' /dev/random 2>/dev/null |
 219                                 awk -v local="2,6,A,E" -v seed="$(date +%s)" 'BEGIN{srand(seed)}NR==1{split(local,b,",");
 220                                 seed=int(rand()*4+1);printf "%s%s:%s:%s:%s:%s:%s",substr($1,0,1),b[seed],$2,$3,$4,$5,$6}')"
 221                         uci_set "wireless" "${section}" "macaddr" "${result}"
 222                 else
 223                         uci_remove "wireless" "${section}" "macaddr" 2>/dev/null
 224                         ifname="$(ubus -S call network.wireless status 2>/dev/null | jsonfilter -q -l1 -e '@.*.interfaces[@.config.mode="sta"].ifname')"
 225                         result="$(${trm_iwinfo} "${ifname}" info 2>/dev/null | awk '/Access Point:/{printf "%s",$3}')"
 226                 fi
 227         elif [ "${action}" = "get" ]; then
 228                 result="$(uci_get "wireless" "${section}" "macaddr")"
 229                 if [ -z "${result}" ]; then
 230                         ifname="$(ubus -S call network.wireless status 2>/dev/null | jsonfilter -q -l1 -e '@.*.interfaces[@.config.mode="sta"].ifname')"
 231                         result="$(${trm_iwinfo} "${ifname}" info 2>/dev/null | awk '/Access Point:/{printf "%s",$3}')"
 232                 fi
 233         fi
 234         printf "%s" "${result}"
 235         f_log "debug" "f_mac    ::: action: ${action:-"-"}, section: ${section:-"-"}, macaddr: ${macaddr:-"-"}, result: ${result:-"-"}"
 236 }
 237
 238 # set connection information
 239 #
 240 f_ctrack() {
 241         local expiry action="${1}"
 242
 243         if [ -n "${trm_uplinkcfg}" ]; then
 244                 case "${action}" in
 245                         "start")
 246                                 uci_remove "travelmate" "${trm_uplinkcfg}" "con_start" 2>/dev/null
 247                                 uci_remove "travelmate" "${trm_uplinkcfg}" "con_end" 2>/dev/null
 248                                 if [ -f "${trm_ntpfile}" ]; then
 249                                         uci_set "travelmate" "${trm_uplinkcfg}" "con_start" "$(date "+%Y.%m.%d-%H:%M:%S")"
 250                                 fi
 251                                 ;;
 252                         "refresh")
 253                                 if [ -f "${trm_ntpfile}" ] && [ -z "$(uci_get "travelmate" "${trm_uplinkcfg}" "con_start")" ]; then
 254                                         uci_set "travelmate" "${trm_uplinkcfg}" "con_start" "$(date "+%Y.%m.%d-%H:%M:%S")"
 255                                 fi
 256                                 ;;
 257                         "end")
 258                                 if [ -f "${trm_ntpfile}" ]; then
 259                                         uci_set "travelmate" "${trm_uplinkcfg}" "con_end" "$(date "+%Y.%m.%d-%H:%M:%S")"
 260                                 fi
 261                                 ;;
 262                         "start_expiry")
 263                                 if [ -f "${trm_ntpfile}" ]; then
 264                                         expiry="$(uci_get "travelmate" "${trm_uplinkcfg}" "con_start_expiry")"
 265                                         uci_set "travelmate" "${trm_uplinkcfg}" "enabled" "0"
 266                                         uci_set "travelmate" "${trm_uplinkcfg}" "con_end" "$(date "+%Y.%m.%d-%H:%M:%S")"
 267                                         f_log "info" "uplink '${radio}/${essid}/${bssid:-"-"}' expired after ${expiry} minutes"
 268                                 fi
 269                                 ;;
 270                         "end_expiry")
 271                                 if [ -f "${trm_ntpfile}" ]; then
 272                                         expiry="$(uci_get "travelmate" "${trm_uplinkcfg}" "con_end_expiry")"
 273                                         uci_set "travelmate" "${trm_uplinkcfg}" "enabled" "1"
 274                                         uci_remove "travelmate" "${trm_uplinkcfg}" "con_start" 2>/dev/null
 275                                         uci_remove "travelmate" "${trm_uplinkcfg}" "con_end" 2>/dev/null
 276                                         f_log "info" "uplink '${radio}/${essid}/${bssid:-"-"}' re-enabled after ${expiry} minutes"
 277                                 fi
 278                                 ;;
 279                         "disabled")
 280                                 uci_set "travelmate" "${trm_uplinkcfg}" "enabled" "0"
 281                                 if [ -f "${trm_ntpfile}" ]; then
 282                                         uci_set "travelmate" "${trm_uplinkcfg}" "con_end" "$(date "+%Y.%m.%d-%H:%M:%S")"
 283                                 fi
 284                                 ;;
 285                 esac
 286                 if [ -n "$(uci -q changes "travelmate")" ]; then
 287                         uci_commit "travelmate"
 288                         if [ ! -f "${trm_refreshfile}" ]; then
 289                                 printf "%s" "cfg_reload" >"${trm_refreshfile}"
 290                         fi
 291                 fi
 292         fi
 293         f_log "debug" "f_ctrack ::: action: ${action:-"-"}, uplink_config: ${trm_uplinkcfg:-"-"}"
 294 }
 295
 296 # get wan gateway addresses
 297 #
 298 f_getgw() {
 299         local result wan4_if wan4_gw wan6_if wan6_gw
 300
 301         network_flush_cache
 302         network_find_wan wan4_if
 303         network_find_wan6 wan6_if
 304         network_get_gateway wan4_gw "${wan4_if}"
 305         network_get_gateway6 wan6_gw "${wan6_if}"
 306         if [ -n "${wan4_gw}" ] || [ -n "${wan6_gw}" ]; then
 307                 result="${wan4_gw} ${wan6_gw}"
 308         fi
 309         printf "%s" "${result}"
 310         f_log "debug" "f_getgw  ::: wan4_gw: ${wan4_gw:-"-"}, wan6_gw: ${wan6_gw:-"-"}, result: ${result:-"-"}"
 311 }
 312
 313 # get uplink config section
 314 #
 315 f_getcfg() {
 316         local t_radio t_essid t_bssid radio="${1}" essid="${2}" bssid="${3}" cnt="0"
 317
 318         while uci_get "travelmate" "@uplink[${cnt}]" >/dev/null 2>&1; do
 319                 t_radio="$(uci_get "travelmate" "@uplink[${cnt}]" "device")"
 320                 t_essid="$(uci_get "travelmate" "@uplink[${cnt}]" "ssid")"
 321                 t_bssid="$(uci_get "travelmate" "@uplink[${cnt}]" "bssid")"
 322                 if [ -n "${radio}" ] && [ -n "${essid}" ] &&
 323                         [ "${t_radio}" = "${radio}" ] && [ "${t_essid}" = "${essid}" ] && [ "${t_bssid}" = "${bssid}" ]; then
 324                         trm_uplinkcfg="@uplink[${cnt}]"
 325                         break
 326                 fi
 327                 cnt="$((cnt + 1))"
 328         done
 329         f_log "debug" "f_getcfg ::: status: ${status}, section: ${section}, uplink_config: ${trm_uplinkcfg:-"-"}"
 330 }
 331
 332 # get travelmate option value in 'uplink' sections
 333 #
 334 f_getval() {
 335         local result t_option="${1}"
 336
 337         if [ -n "${trm_uplinkcfg}" ]; then
 338                 result="$(uci_get "travelmate" "${trm_uplinkcfg}" "${t_option}")"
 339                 printf "%s" "${result}"
 340         fi
 341         f_log "debug" "f_getval ::: option: ${t_option:-"-"}, result: ${result:-"-"}, uplink_config: ${trm_uplinkcfg:-"-"}"
 342 }
 343
 344 # set 'wifi-device' sections
 345 #
 346 f_setdev() {
 347         local disabled radio="${1}"
 348
 349         disabled="$(uci_get "wireless" "${radio}" "disabled")"
 350         if [ "${disabled}" = "1" ]; then
 351                 uci_set wireless "${radio}" "disabled" "0"
 352         fi
 353         if [ -n "${trm_radio}" ] && [ -z "${trm_radiolist}" ]; then
 354                 trm_radiolist="${trm_radio}"
 355         elif [ -z "${trm_radio}" ] && ! printf "%s" "${trm_radiolist}" | grep -q "${radio}"; then
 356                 trm_radiolist="$(f_trim "${trm_radiolist} ${radio}")"
 357         fi
 358         f_log "debug" "f_setdev ::: radio: ${radio:-"-"}, radio_list(cnf/cur): ${trm_radio:-"-"}/${trm_radiolist:-"-"}, disabled: ${disabled:-"-"}"
 359 }
 360
 361 # set 'wifi-iface' sections
 362 #
 363 f_setif() {
 364         local mode radio essid bssid enabled disabled con_start con_end con_start_expiry con_end_expiry section="${1}" proactive="${2}"
 365
 366         mode="$(uci_get "wireless" "${section}" "mode")"
 367         radio="$(uci_get "wireless" "${section}" "device")"
 368         essid="$(uci_get "wireless" "${section}" "ssid")"
 369         bssid="$(uci_get "wireless" "${section}" "bssid")"
 370         disabled="$(uci_get "wireless" "${section}" "disabled")"
 371
 372         f_getcfg "${radio}" "${essid}" "${bssid}"
 373
 374         enabled="$(f_getval "enabled")"
 375         con_start="$(f_getval "con_start")"
 376         con_end="$(f_getval "con_end")"
 377         con_start_expiry="$(f_getval "con_start_expiry")"
 378         con_end_expiry="$(f_getval "con_end_expiry")"
 379
 380         if [ "${enabled}" = "0" ] && [ -n "${con_end}" ] && [ -n "${con_end_expiry}" ] && [ "${con_end_expiry}" != "0" ]; then
 381                 d1="$(date -d "${con_end}" "+%s")"
 382                 d2="$(date "+%s")"
 383                 d3="$(((d2 - d1) / 60))"
 384                 if [ "${d3}" -ge "${con_end_expiry}" ]; then
 385                         enabled="1"
 386                         f_ctrack "end_expiry"
 387                 fi
 388         elif [ "${enabled}" = "1" ] && [ -n "${con_start}" ] && [ -n "${con_start_expiry}" ] && [ "${con_start_expiry}" != "0" ]; then
 389                 d1="$(date -d "${con_start}" "+%s")"
 390                 d2="$(date "+%s")"
 391                 d3="$((d1 + (con_start_expiry * 60)))"
 392                 if [ "${d2}" -gt "${d3}" ]; then
 393                         enabled="0"
 394                         f_ctrack "start_expiry"
 395                 fi
 396         fi
 397
 398         if [ "${mode}" = "sta" ]; then
 399                 if [ "${enabled}" = "0" ] || { { [ -z "${disabled}" ] || [ "${disabled}" = "0" ]; } &&
 400                         { [ "${proactive}" = "0" ] || [ "${trm_ifstatus}" != "true" ]; }; }; then
 401                         uci_set "wireless" "${section}" "disabled" "1"
 402                 elif [ "${enabled}" = "1" ] && [ "${disabled}" = "0" ] && [ "${trm_ifstatus}" = "true" ] && [ "${proactive}" = "1" ]; then
 403                         if [ -z "${trm_activesta}" ]; then
 404                                 trm_activesta="${section}"
 405                         else
 406                                 uci_set "wireless" "${section}" "disabled" "1"
 407                         fi
 408                 fi
 409                 if [ "${enabled}" = "1" ]; then
 410                         trm_stalist="$(f_trim "${trm_stalist} ${section}-${radio}")"
 411                 fi
 412         fi
 413         f_log "debug" "f_setif  ::: enabled: ${enabled}, section: ${section}, active_sta: ${trm_activesta:-"-"}, uplink_config: ${trm_uplinkcfg:-"-"}"
 414 }
 415
 416 # add open uplinks
 417 #
 418 f_addsta() {
 419         local uci_cfg new_uplink="1" offset="1" radio="${1}" essid="${2}"
 420
 421         if [ "${trm_maxautoadd}" = "0" ] || [ "${trm_opensta:-0}" -lt "${trm_maxautoadd}" ]; then
 422                 config_cb() {
 423                         local type="${1}" name="${2}"
 424
 425                         if [ "${type}" = "wifi-iface" ]; then
 426                                 if [ "$(uci_get "wireless.${name}.ssid")" = "${essid}" ] &&
 427                                         [ "$(uci_get "wireless.${name}.device")" = "${radio}" ]; then
 428                                         new_uplink="0"
 429                                         return 0
 430                                 fi
 431                                 offset="$((offset + 1))"
 432                         fi
 433                 }
 434                 config_load wireless
 435         else
 436                 new_uplink="0"
 437         fi
 438
 439         if [ "${new_uplink}" = "1" ]; then
 440                 uci_cfg="trm_uplink$((offset + 1))"
 441                 while [ -n "$(uci_get "wireless.${uci_cfg}")" ]; do
 442                         offset="$((offset + 1))"
 443                         uci_cfg="trm_uplink${offset}"
 444                 done
 445                 uci -q batch <<-EOC
 446                         set wireless."${uci_cfg}"="wifi-iface"
 447                         set wireless."${uci_cfg}".mode="sta"
 448                         set wireless."${uci_cfg}".network="${trm_iface}"
 449                         set wireless."${uci_cfg}".device="${radio}"
 450                         set wireless."${uci_cfg}".ssid="${essid}"
 451                         set wireless."${uci_cfg}".encryption="none"
 452                         set wireless."${uci_cfg}".disabled="1"
 453                 EOC
 454                 uci_cfg="$(uci -q add travelmate uplink)"
 455                 uci -q batch <<-EOC
 456                         set travelmate."${uci_cfg}".device="${radio}"
 457                         set travelmate."${uci_cfg}".ssid="${essid}"
 458                         set travelmate."${uci_cfg}".opensta="1"
 459                         set travelmate."${uci_cfg}".con_start_expiry="0"
 460                         set travelmate."${uci_cfg}".con_end_expiry="0"
 461                         set travelmate."${uci_cfg}".enabled="1"
 462                 EOC
 463                 if [ -n "$(uci -q changes "travelmate")" ] || [ -n "$(uci -q changes "wireless")" ]; then
 464                         trm_opensta="$((trm_opensta + 1))"
 465                         uci_commit "travelmate"
 466                         uci_commit "wireless"
 467                         f_wifi
 468                         if [ ! -f "${trm_refreshfile}" ]; then
 469                                 printf "%s" "ui_reload" >"${trm_refreshfile}"
 470                         fi
 471                         f_log "info" "open uplink '${radio}/${essid}' added to wireless config"
 472                 fi
 473         fi
 474         f_log "debug" "f_addsta ::: radio: ${radio:-"-"}, essid: ${essid}, opensta/maxautoadd: ${trm_opensta:-"-"}/${trm_maxautoadd:-"-"}, new_uplink: ${new_uplink}, offset: ${offset}"
 475 }
 476
 477 # check net status
 478 #
 479 f_net() {
 480         local err_msg raw html_raw html_cp json_raw json_ec json_rc json_cp json_ed result="net nok"
 481
 482         raw="$(${trm_fetch} --user-agent "${trm_useragent}" --referer "http://www.example.com" --header "Cache-Control: no-cache, no-store, must-revalidate, max-age=0" --write-out "%{json}" --silent --max-time $((trm_maxwait / 6)) "${trm_captiveurl}")"
 483         json_raw="${raw#*\{}"
 484         html_raw="${raw%%\{*}"
 485         if [ -n "${json_raw}" ]; then
 486                 json_ec="$(printf "%s" "{${json_raw}" | jsonfilter -q -l1 -e '@.exitcode')"
 487                 json_rc="$(printf "%s" "{${json_raw}" | jsonfilter -q -l1 -e '@.response_code')"
 488                 json_cp="$(printf "%s" "{${json_raw}" | jsonfilter -q -l1 -e '@.redirect_url' | awk 'BEGIN{FS="/"}{printf "%s",tolower($3)}')"
 489                 if [ "${json_ec}" = "0" ]; then
 490                         if [ -n "${json_cp}" ]; then
 491                                 result="net cp '${json_cp}'"
 492                         else
 493                                 if [ "${json_rc}" = "200" ] || [ "${json_rc}" = "204" ]; then
 494                                         html_cp="$(printf "%s" "${html_raw}" | awk 'match(tolower($0),/^.*<meta[ \t]+http-equiv=['\''"]*refresh.*[ \t;]url=/){print substr(tolower($0),RLENGTH+1)}' | awk 'BEGIN{FS="[:/]"}{printf "%s",$4;exit}')"
 495                                         if [ -n "${html_cp}" ]; then
 496                                                 result="net cp '${html_cp}'"
 497                                         else
 498                                                 result="net ok"
 499                                         fi
 500                                 fi
 501                         fi
 502                 else
 503                         err_msg="$(printf "%s" "{${json_raw}" | jsonfilter -q -l1 -e '@.errormsg')"
 504                         json_ed="$(printf "%s" "{${err_msg}" | awk '/([[:alnum:]_-]{1,63}\.)+[[:alpha:]]+$/{printf "%s",tolower($NF)}')"
 505                         if [ "${json_ec}" = "6" ]; then
 506                                 if [ -n "${json_ed}" ] && [ "${json_ed}" != "${trm_captiveurl#http*://*}" ]; then
 507                                         result="net cp '${json_ed}'"
 508                                 fi
 509                         elif [ "${json_ec}" = "28" ]; then
 510                                 if [ -n "$(f_getgw)" ]; then
 511                                         result="net ok"
 512                                 fi
 513                         fi
 514                 fi
 515         fi
 516         printf "%s" "${result}"
 517         f_log "debug" "f_net    ::: fetch: ${trm_fetch}, timeout: $((trm_maxwait / 6)), cp (json/html): ${json_cp:-"-"}/${html_cp:-"-"}, result: ${result}, error (rc/msg): ${json_ec}/${err_msg:-"-"}, url: ${trm_captiveurl}, user_agent: ${trm_useragent}"
 518 }
 519
 520 # check interface status
 521 #
 522 f_check() {
 523         local ifname radio dev_status result login_script login_script_args cp_domain wait_time="1" enabled="1" mode="${1}" status="${2}" sta_radio="${3}" sta_essid="${4}" sta_bssid="${5}"
 524
 525         if [ "${mode}" = "initial" ] || [ "${mode}" = "dev" ]; then
 526                 json_get_var station_id "station_id"
 527                 sta_radio="${station_id%%/*}"
 528                 sta_essid="${station_id%/*}"
 529                 sta_essid="${sta_essid#*/}"
 530                 sta_bssid="${station_id##*/}"
 531                 sta_bssid="${sta_bssid//-/}"
 532         fi
 533         f_getcfg "${sta_radio}" "${sta_essid}" "${sta_bssid}"
 534
 535         if [ "${mode}" != "rev" ] && [ -n "${sta_radio}" ] && [ "${sta_radio}" != "-" ] && [ -n "${sta_essid}" ] && [ "${sta_essid}" != "-" ]; then
 536                 enabled="$(f_getval "enabled")"
 537         fi
 538         if { [ "${mode}" != "initial" ] && [ "${mode}" != "dev" ] && [ "${status}" = "false" ]; } ||
 539                 { [ "${mode}" = "dev" ] && { [ "${status}" = "false" ] || { [ "${trm_ifstatus}" != "${status}" ] && [ "${enabled}" = "0" ]; }; }; }; then
 540                 f_wifi
 541         fi
 542         while [ "${wait_time}" -le "${trm_maxwait}" ]; do
 543                 dev_status="$(ubus -S call network.wireless status 2>/dev/null)"
 544                 if [ -n "${dev_status}" ]; then
 545                         if [ "${mode}" = "dev" ]; then
 546                                 if [ "${trm_ifstatus}" != "${status}" ]; then
 547                                         trm_ifstatus="${status}"
 548                                         f_jsnup
 549                                 fi
 550                                 if [ "${status}" = "false" ]; then
 551                                         sleep "$((trm_maxwait / 5))"
 552                                 fi
 553                                 break
 554                         elif [ "${mode}" = "rev" ]; then
 555                                 unset trm_connection
 556                                 trm_ifstatus="${status}"
 557                                 break
 558                         else
 559                                 ifname="$(printf "%s" "${dev_status}" | jsonfilter -q -l1 -e '@.*.interfaces[@.config.mode="sta"].ifname')"
 560                                 if [ -n "${ifname}" ] && [ "${enabled}" = "1" ]; then
 561                                         trm_ifquality="$(${trm_iwinfo} "${ifname}" info 2>/dev/null | awk -F '[ ]' '/Link Quality:/{split($NF,var0,"/");printf "%i\n",(var0[1]*100/var0[2])}')"
 562                                         if [ "${trm_ifquality}" -ge "${trm_minquality}" ]; then
 563                                                 trm_ifstatus="$(ubus -S call network.interface dump 2>/dev/null | jsonfilter -q -l1 -e "@.interface[@.device=\"${ifname}\"].up")"
 564                                                 if [ "${trm_ifstatus}" = "true" ]; then
 565                                                         result="$(f_net)"
 566                                                         if [ "${trm_captive}" = "1" ]; then
 567                                                                 cp_domain="$(printf "%s" "${result}" | awk -F '['\''| ]' '/^net cp/{printf "%s",$4}')"
 568                                                                 if [ -x "/etc/init.d/dnsmasq" ] && [ -f "/etc/config/dhcp" ] &&
 569                                                                         [ -n "${cp_domain}" ] && ! uci_get "dhcp" "@dnsmasq[0]" "rebind_domain" | grep -q "${cp_domain}"; then
 570                                                                         uci_add_list "dhcp" "@dnsmasq[0]" "rebind_domain" "${cp_domain}"
 571                                                                         uci_commit "dhcp"
 572                                                                         /etc/init.d/dnsmasq reload
 573                                                                         f_log "info" "captive portal domain '${cp_domain}' added to to dhcp rebind whitelist"
 574                                                                 fi
 575                                                                 if [ -n "${cp_domain}" ] && [ "${trm_captive}" = "1" ]; then
 576                                                                         trm_connection="${result:-"-"}/${trm_ifquality}"
 577                                                                         f_jsnup
 578                                                                         login_script="$(f_getval "script")"
 579                                                                         if [ -x "${login_script}" ]; then
 580                                                                                 login_script_args="$(f_getval "script_args")"
 581                                                                                 "${login_script}" ${login_script_args} >/dev/null 2>&1
 582                                                                                 rc="${?}"
 583                                                                                 if [ "${rc}" = "255" ]; then
 584                                                                                         f_log "info" "captive portal login script for '${cp_domain}' failed with rc '${rc}'"
 585                                                                                         unset trm_connection
 586                                                                                         trm_ifstatus="${status}"
 587                                                                                         f_jsnup
 588                                                                                         break
 589                                                                                 else
 590                                                                                         f_log "info" "captive portal login script for '${cp_domain}' has been finished  with rc '${rc}'"
 591                                                                                         if [ "${rc}" = "0" ]; then
 592                                                                                                 result="$(f_net)"
 593                                                                                         fi
 594                                                                                 fi
 595                                                                         fi
 596                                                                 fi
 597                                                         fi
 598                                                         if [ "${trm_netcheck}" = "1" ] && [ "${result}" = "net nok" ]; then
 599                                                                 f_log "info" "uplink has no internet"
 600                                                                 f_vpn "disable"
 601                                                                 trm_ifstatus="${status}"
 602                                                                 f_jsnup
 603                                                                 break
 604                                                         fi
 605                                                         trm_connection="${result:-"-"}/${trm_ifquality}"
 606                                                         f_jsnup
 607                                                         break
 608                                                 fi
 609                                         elif [ -n "${trm_connection}" ] && { [ "${trm_netcheck}" = "1" ] || [ "${mode}" = "initial" ]; }; then
 610                                                 f_log "info" "uplink is out of range (${trm_ifquality}/${trm_minquality})"
 611                                                 f_vpn "disable"
 612                                                 unset trm_connection
 613                                                 trm_ifstatus="${status}"
 614                                                 f_ctrack "end"
 615                                                 f_jsnup
 616                                                 break
 617                                         elif [ "${mode}" = "initial" ] || [ "${mode}" = "sta" ]; then
 618                                                 unset trm_connection
 619                                                 trm_ifstatus="${status}"
 620                                                 f_jsnup
 621                                                 break
 622                                         fi
 623                                 elif [ -n "${trm_connection}" ]; then
 624                                         f_vpn "disable"
 625                                         unset trm_connection
 626                                         trm_ifstatus="${status}"
 627                                         f_jsnup
 628                                         break
 629                                 elif [ "${mode}" = "initial" ]; then
 630                                         trm_ifstatus="${status}"
 631                                         f_jsnup
 632                                         break
 633                                 fi
 634                         fi
 635                 fi
 636                 if [ "${mode}" = "initial" ]; then
 637                         trm_ifstatus="${status}"
 638                         f_jsnup
 639                         break
 640                 fi
 641                 wait_time="$((wait_time + 1))"
 642                 sleep 1
 643         done
 644         f_log "debug" "f_check  ::: mode: ${mode}, name: ${ifname:-"-"}, status: ${trm_ifstatus}, enabled: ${enabled}, connection: ${trm_connection:-"-"}, wait: ${wait_time}, max_wait: ${trm_maxwait}, min_quality: ${trm_minquality}, captive: ${trm_captive}, netcheck: ${trm_netcheck}"
 645 }
 646
 647 # update runtime information
 648 #
 649 f_jsnup() {
 650         local vpn section last_date last_station sta_iface sta_radio sta_essid sta_bssid sta_mac dev_status last_status status="${trm_ifstatus}" ntp_done="0" vpn_done="0" mail_done="0"
 651
 652         if [ "${status}" = "true" ]; then
 653                 status="connected (${trm_connection:-"-"})"
 654                 dev_status="$(ubus -S call network.wireless status 2>/dev/null)"
 655                 section="$(printf "%s" "${dev_status}" | jsonfilter -q -l1 -e '@.*.interfaces[@.config.mode="sta"].section')"
 656                 if [ -n "${section}" ]; then
 657                         sta_iface="$(uci_get "wireless" "${section}" "network")"
 658                         sta_radio="$(uci_get "wireless" "${section}" "device")"
 659                         sta_essid="$(uci_get "wireless" "${section}" "ssid")"
 660                         sta_bssid="$(uci_get "wireless" "${section}" "bssid")"
 661                         sta_mac="$(f_mac "get" "${section}")"
 662                         f_getcfg "${sta_radio}" "${sta_essid}" "${sta_bssid}"
 663                         vpn="$(f_getval "vpn")"
 664                 fi
 665                 json_get_var last_date "last_run"
 666                 json_get_var last_station "station_id"
 667                 json_get_var last_status "travelmate_status"
 668
 669                 if { [ -f "${trm_ntpfile}" ] && [ ! -s "${trm_ntpfile}" ]; } || [ "${last_status}" = "running (not connected)" ] ||
 670                         { [ -n "${last_station}" ] && [ "${last_station}" != "${sta_radio:-"-"}/${sta_essid:-"-"}/${sta_bssid:-"-"}" ]; }; then
 671                         last_date="$(date "+%Y.%m.%d-%H:%M:%S")"
 672                         if [ -f "${trm_ntpfile}" ] && [ ! -s "${trm_ntpfile}" ]; then
 673                                 printf "%s" "${last_date}" >"${trm_ntpfile}"
 674                         fi
 675                 fi
 676         elif [ "${status}" = "error" ]; then
 677                 unset trm_connection
 678                 status="program error"
 679         else
 680                 unset trm_connection
 681                 status="running (not connected)"
 682         fi
 683         if [ -z "${last_date}" ]; then
 684                 last_date="$(date "+%Y.%m.%d-%H:%M:%S")"
 685         fi
 686         if [ -s "${trm_ntpfile}" ]; then
 687                 ntp_done="1"
 688         fi
 689         if [ "${vpn}" = "1" ] && [ -f "${trm_vpnfile}" ]; then
 690                 vpn_done="1"
 691         fi
 692         if [ "${trm_mail}" = "1" ] && [ -f "${trm_mailfile}" ]; then
 693                 mail_done="1"
 694         fi
 695         json_add_string "travelmate_status" "${status}"
 696         json_add_string "travelmate_version" "${trm_ver}"
 697         json_add_string "station_id" "${sta_radio:-"-"}/${sta_essid:-"-"}/${sta_bssid:-"-"}"
 698         json_add_string "station_mac" "${sta_mac:-"-"}"
 699         json_add_string "station_interface" "${sta_iface:-"-"}"
 700         json_add_string "wpa_flags" "${trm_wpaflags:-"-"}"
 701         json_add_string "run_flags" "captive: $(f_char ${trm_captive}), proactive: $(f_char ${trm_proactive}), netcheck: $(f_char ${trm_netcheck}), autoadd: $(f_char ${trm_autoadd}), randomize: $(f_char ${trm_randomize})"
 702         json_add_string "ext_hooks" "ntp: $(f_char ${ntp_done}), vpn: $(f_char ${vpn_done}), mail: $(f_char ${mail_done})"
 703         json_add_string "last_run" "${last_date}"
 704         json_add_string "system" "${trm_sysver}"
 705         json_dump >"${trm_rtfile}"
 706
 707         if [ "${status%% (net ok/*}" = "connected" ] && [ "${trm_mail}" = "1" ] && [ -x "${trm_mailpgm}" ] && [ "${ntp_done}" = "1" ] && [ "${mail_done}" = "0" ]; then
 708                 if [ "${vpn}" != "1" ] || [ "${vpn_done}" = "1" ]; then
 709                         : >"${trm_mailfile}"
 710                         "${trm_mailpgm}" >/dev/null 2>&1
 711                 fi
 712         fi
 713         f_log "debug" "f_jsnup  ::: section: ${section:-"-"}, status: ${status:-"-"}, sta_iface: ${sta_iface:-"-"}, sta_radio: ${sta_radio:-"-"}, sta_essid: ${sta_essid:-"-"}, sta_bssid: ${sta_bssid:-"-"}, ntp: ${ntp_done}, vpn: ${vpn:-"0"}/${vpn_done}, mail: ${trm_mail}/${mail_done}"
 714 }
 715
 716 # write to syslog
 717 #
 718 f_log() {
 719         local class="${1}" log_msg="${2}"
 720
 721         if [ -n "${log_msg}" ] && { [ "${class}" != "debug" ] || [ "${trm_debug}" = "1" ]; }; then
 722                 if [ -x "${trm_logger}" ]; then
 723                         "${trm_logger}" -p "${class}" -t "trm-${trm_ver}[${$}]" "${log_msg}"
 724                 else
 725                         printf "%s %s %s\n" "${class}" "trm-${trm_ver}[${$}]" "${log_msg}"
 726                 fi
 727                 if [ "${class}" = "err" ]; then
 728                         trm_ifstatus="error"
 729                         f_jsnup
 730                         : >"${trm_pidfile}"
 731                         exit 1
 732                 fi
 733         fi
 734 }
 735
 736 # main function for connection handling
 737 #
 738 f_main() {
 739         local radio cnt retrycnt scan_dev scan_list scan_essid scan_bssid scan_open scan_quality
 740         local station_id section sta sta_essid sta_bssid sta_radio sta_mac config_essid config_bssid config_radio
 741
 742         f_check "initial" "false"
 743         f_log "debug" "f_main-1 ::: status: ${trm_ifstatus}, proactive: ${trm_proactive}"
 744         if [ "${trm_ifstatus}" != "true" ] || [ "${trm_proactive}" = "1" ]; then
 745                 config_load wireless
 746                 config_foreach f_setif wifi-iface "${trm_proactive}"
 747                 if [ "${trm_ifstatus}" = "true" ] && [ -n "${trm_activesta}" ] && [ "${trm_proactive}" = "1" ]; then
 748                         json_get_var station_id "station_id"
 749                         config_radio="${station_id%%/*}"
 750                         config_essid="${station_id%/*}"
 751                         config_essid="${config_essid#*/}"
 752                         config_bssid="${station_id##*/}"
 753                         config_bssid="${config_bssid//-/}"
 754                         f_check "dev" "true"
 755                         f_log "debug" "f_main-2 ::: config_radio: ${config_radio}, config_essid: \"${config_essid}\", config_bssid: ${config_bssid:-"-"}"
 756                 else
 757                         uci_commit "wireless"
 758                         f_check "dev" "false"
 759                 fi
 760                 f_log "debug" "f_main-3 ::: radio_list: ${trm_radiolist:-"-"}, sta_list: ${trm_stalist:-"-"}"
 761
 762                 # radio loop
 763                 #
 764                 for radio in ${trm_radiolist}; do
 765                         if ! printf "%s" "${trm_stalist}" | grep -q "\\-${radio}"; then
 766                                 if [ "${trm_autoadd}" = "0" ]; then
 767                                         f_log "info" "no enabled station on radio '${radio}'"
 768                                         continue
 769                                 fi
 770                         fi
 771                         scan_list=""
 772
 773                         # station loop
 774                         #
 775                         for sta in ${trm_stalist:-"${radio}"}; do
 776                                 if [ "${sta}" != "${radio}" ]; then
 777                                         section="${sta%%-*}"
 778                                         sta_radio="$(uci_get "wireless" "${section}" "device")"
 779                                         sta_essid="$(uci_get "wireless" "${section}" "ssid")"
 780                                         sta_bssid="$(uci_get "wireless" "${section}" "bssid")"
 781                                         sta_mac="$(f_mac "get" "${section}")"
 782                                         if [ -z "${sta_radio}" ] || [ -z "${sta_essid}" ]; then
 783                                                 f_log "info" "invalid wireless section '${section}'"
 784                                                 continue
 785                                         fi
 786                                         if [ -n "${trm_connection}" ] && [ "${radio}" = "${config_radio}" ] && [ "${sta_radio}" = "${config_radio}" ] &&
 787                                                 [ "${sta_essid}" = "${config_essid}" ] && [ "${sta_bssid}" = "${config_bssid}" ]; then
 788                                                 f_ctrack "refresh"
 789                                                 f_log "info" "uplink still in range '${config_radio}/${config_essid}/${config_bssid:-"-"}' with mac '${sta_mac:-"-"}'"
 790                                                 f_vpn
 791                                                 return 0
 792                                         fi
 793                                         f_log "debug" "f_main-4 ::: sta_radio: ${sta_radio}, sta_essid: \"${sta_essid}\", sta_bssid: ${sta_bssid:-"-"}"
 794                                 fi
 795                                 if [ -z "${scan_list}" ]; then
 796                                         scan_dev="$(ubus -S call network.wireless status 2>/dev/null | jsonfilter -q -l1 -e "@.${radio}.interfaces[0].ifname")"
 797                                         scan_list="$("${trm_iwinfo}" "${scan_dev:-${radio}}" scan 2>/dev/null |
 798                                                 awk 'BEGIN{FS="[[:space:]]"}/Address:/{var1=$NF}/ESSID:/{var2="";for(i=12;i<=NF;i++)if(var2==""){var2=$i}else{var2=var2" "$i}}
 799                                                 /Quality:/{split($NF,var0,"/")}/Encryption:/{if($NF=="none"){var3="+"}else{var3="-"};
 800                                                 printf "%i %s %s %s\n",(var0[1]*100/var0[2]),var3,var1,var2}' | sort -rn | head -qn "${trm_maxscan}")"
 801                                         f_log "debug" "f_main-5 ::: radio: ${radio}, scan_device: ${scan_dev}, scan_max: ${trm_maxscan}"
 802                                         if [ -z "${scan_list}" ]; then
 803                                                 f_log "info" "no scan results on '${radio}'"
 804                                                 continue 2
 805                                         fi
 806                                 fi
 807
 808                                 # scan loop
 809                                 #
 810                                 while read -r scan_quality scan_open scan_bssid scan_essid; do
 811                                         if [ -n "${scan_quality}" ] && [ -n "${scan_open}" ] && [ -n "${scan_bssid}" ] && [ -n "${scan_essid}" ]; then
 812                                                 f_log "debug" "f_main-6 ::: radio(sta/scan): ${sta_radio}/${radio}, essid(sta/scan): \"${sta_essid}\"/${scan_essid}, bssid(sta/scan): ${sta_bssid}/${scan_bssid}, quality(min/scan): ${trm_minquality}/${scan_quality}, open: ${scan_open}"
 813                                                 if [ "${scan_quality}" -ge "${trm_minquality}" ]; then
 814                                                         if { { [ "${scan_essid}" = "\"${sta_essid}\"" ] && { [ -z "${sta_bssid}" ] || [ "${scan_bssid}" = "${sta_bssid}" ]; }; } ||
 815                                                                 { [ "${scan_bssid}" = "${sta_bssid}" ] && [ "${scan_essid}" = "unknown" ]; }; } && [ "${radio}" = "${sta_radio}" ]; then
 816                                                                 if [ -n "${config_radio}" ]; then
 817                                                                         f_vpn "disable"
 818                                                                         uci_set "wireless" "${trm_activesta}" "disabled" "1"
 819                                                                         uci_commit "wireless"
 820                                                                         f_check "rev" "false"
 821                                                                         f_ctrack "end"
 822                                                                         f_log "info" "uplink connection terminated '${config_radio}/${config_essid}/${config_bssid:-"-"}'"
 823                                                                         unset config_radio config_essid config_bssid
 824                                                                 fi
 825
 826                                                                 # retry loop
 827                                                                 #
 828                                                                 retrycnt="1"
 829                                                                 f_getcfg "${sta_radio}" "${sta_essid}" "${sta_bssid}"
 830                                                                 while [ "${retrycnt}" -le "${trm_maxretry}" ]; do
 831                                                                         sta_mac="$(f_mac "set" "${section}")"
 832                                                                         uci_set "wireless" "${section}" "disabled" "0"
 833                                                                         f_check "sta" "false" "${sta_radio}" "${sta_essid}" "${sta_bssid}"
 834                                                                         if [ "${trm_ifstatus}" = "true" ]; then
 835                                                                                 rm -f "${trm_mailfile}"
 836                                                                                 uci_commit "wireless"
 837                                                                                 f_ctrack "start"
 838                                                                                 f_log "info" "connected to uplink '${sta_radio}/${sta_essid}/${sta_bssid:-"-"}' with mac '${sta_mac:-"-"}' (${retrycnt}/${trm_maxretry})"
 839                                                                                 f_vpn "enable"
 840                                                                                 return 0
 841                                                                         else
 842                                                                                 uci -q revert "wireless"
 843                                                                                 f_check "rev" "false"
 844                                                                                 if [ "${retrycnt}" = "${trm_maxretry}" ]; then
 845                                                                                         f_ctrack "disabled"
 846                                                                                         f_log "info" "uplink has been disabled '${sta_radio}/${sta_essid}/${sta_bssid:-"-"}' (${retrycnt}/${trm_maxretry})"
 847                                                                                         break 2
 848                                                                                 else
 849                                                                                         f_jsnup
 850                                                                                         f_log "info" "can't connect to uplink '${sta_radio}/${sta_essid}/${sta_bssid:-"-"}' (${retrycnt}/${trm_maxretry})"
 851                                                                                 fi
 852                                                                         fi
 853                                                                         retrycnt="$((retrycnt + 1))"
 854                                                                         sleep "$((trm_maxwait / 6))"
 855                                                                 done
 856                                                         elif [ "${trm_autoadd}" = "1" ] && [ "${scan_open}" = "+" ] && [ "${scan_essid}" != "unknown" ]; then
 857                                                                 scan_essid="${scan_essid%?}"
 858                                                                 scan_essid="${scan_essid:1}"
 859                                                                 f_addsta "${radio}" "${scan_essid}"
 860                                                         fi
 861                                                 fi
 862                                         fi
 863                                 done <<-EOV
 864                                         ${scan_list}
 865                                 EOV
 866                         done
 867                 done
 868         fi
 869 }
 870
 871 # source required system libraries
 872 #
 873 if [ -r "/lib/functions.sh" ] && [ -r "/lib/functions/network.sh" ] && [ -r "/usr/share/libubox/jshn.sh" ]; then
 874         . "/lib/functions.sh"
 875         . "/lib/functions/network.sh"
 876         . "/usr/share/libubox/jshn.sh"
 877 else
 878         f_log "err" "system libraries not found"
 879 fi
 880
 881 # control travelmate actions
 882 #
 883 while true; do
 884         if [ "${trm_action}" = "stop" ]; then
 885                 if [ -s "${trm_pidfile}" ]; then
 886                         f_log "info" "travelmate instance stopped ::: action: ${trm_action}, pid: $(cat ${trm_pidfile} 2>/dev/null)"
 887                         : >"${trm_rtfile}"
 888                         : >"${trm_pidfile}"
 889                 fi
 890                 break
 891         elif [ -n "${trm_action}" ]; then
 892                 f_log "info" "travelmate instance started ::: action: ${trm_action}, pid: ${$}"
 893                 f_env
 894                 f_main
 895                 unset trm_action
 896         fi
 897         while true; do
 898                 sleep "${trm_timeout}" 0
 899                 rc="${?}"
 900                 if [ "${rc}" != "0" ]; then
 901                         if [ -z "$(f_getgw)" ]; then
 902                                 rc="0"
 903                         fi
 904                 fi
 905                 if [ "${rc}" = "0" ]; then
 906                         break
 907                 fi
 908         done
 909         json_cleanup
 910         f_env
 911         f_main
 912 done