net/travelmate/files/travelmate.sh

   1 #!/bin/sh
   2 # travelmate, a wlan connection manager for travel router
   3 # Copyright (c) 2016-2022 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="2.0.8"
  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="$(f_getval "vpniface")"
 188
 189         if [ -x "${trm_vpnpgm}" ] && [ -n "${vpn}" ] && [ -n "${vpn_service}" ] && [ -n "${vpn_iface}" ] && [ -f "${trm_ntpfile}" ]; then
 190                 if { [ "${vpn_action}" = "disable" ] && [ -f "${trm_vpnfile}" ]; } ||
 191                         { [ "${vpn}" = "1" ] && [ "${vpn_action}" = "enable" ] && [ ! -f "${trm_vpnfile}" ]; } ||
 192                         { [ "${vpn}" != "1" ] && [ "${vpn_action}" = "enable" ] && [ -f "${trm_vpnfile}" ]; }; then
 193                         "${trm_vpnpgm}" "${vpn}" "${vpn_action}" "${vpn_service}" "${vpn_iface}" >/dev/null 2>&1
 194                         rc="${?}"
 195                 fi
 196                 if [ "${vpn}" = "1" ] && [ "${vpn_action}" = "enable" ] && [ "${rc}" = "0" ]; then
 197                         : >"${trm_vpnfile}"
 198                 elif { [ "${vpn}" != "1" ] || [ "${vpn_action}" = "disable" ]; } && [ -f "${trm_vpnfile}" ]; then
 199                         rm -f "${trm_vpnfile}"
 200                 fi
 201                 [ -n "${rc}" ] && f_jsnup
 202         fi
 203         f_log "debug" "f_vpn    ::: enabled: ${vpn:-"-"}, action: ${vpn_action}, service: ${vpn_service:-"-"}, iface: ${vpn_iface:-"-"}, rc: ${rc:-"-"}, program: ${trm_vpnpgm}"
 204 }
 205
 206 # mac helper function
 207 #
 208 f_mac() {
 209         local result ifname macaddr action="${1}" section="${2}"
 210
 211         if [ "${action}" = "set" ]; then
 212                 macaddr="$(f_getval "macaddr")"
 213                 if [ -n "${macaddr}" ]; then
 214                         result="${macaddr}"
 215                         uci_set "wireless" "${section}" "macaddr" "${result}"
 216                 elif [ "${trm_randomize}" = "1" ]; then
 217                         result="$(hexdump -n6 -ve '/1 "%.02X "' /dev/random 2>/dev/null |
 218                                 awk -v local="2,6,A,E" -v seed="$(date +%s)" 'BEGIN{srand(seed)}NR==1{split(local,b,",");
 219                                 seed=int(rand()*4+1);printf "%s%s:%s:%s:%s:%s:%s",substr($1,0,1),b[seed],$2,$3,$4,$5,$6}')"
 220                         uci_set "wireless" "${section}" "macaddr" "${result}"
 221                 else
 222                         uci_remove "wireless" "${section}" "macaddr" 2>/dev/null
 223                         ifname="$(ubus -S call network.wireless status 2>/dev/null | jsonfilter -q -l1 -e '@.*.interfaces[@.config.mode="sta"].ifname')"
 224                         result="$(${trm_iwinfo} "${ifname}" info 2>/dev/null | awk '/Access Point:/{printf "%s",$3}')"
 225                 fi
 226         elif [ "${action}" = "get" ]; then
 227                 result="$(uci_get "wireless" "${section}" "macaddr")"
 228                 if [ -z "${result}" ]; then
 229                         ifname="$(ubus -S call network.wireless status 2>/dev/null | jsonfilter -q -l1 -e '@.*.interfaces[@.config.mode="sta"].ifname')"
 230                         result="$(${trm_iwinfo} "${ifname}" info 2>/dev/null | awk '/Access Point:/{printf "%s",$3}')"
 231                 fi
 232         fi
 233         printf "%s" "${result}"
 234         f_log "debug" "f_mac    ::: action: ${action:-"-"}, section: ${section:-"-"}, macaddr: ${macaddr:-"-"}, result: ${result:-"-"}"
 235 }
 236
 237 # set connection information
 238 #
 239 f_ctrack() {
 240         local expiry action="${1}"
 241
 242         if [ -n "${trm_uplinkcfg}" ]; then
 243                 case "${action}" in
 244                         "start")
 245                                 uci_remove "travelmate" "${trm_uplinkcfg}" "con_start" 2>/dev/null
 246                                 uci_remove "travelmate" "${trm_uplinkcfg}" "con_end" 2>/dev/null
 247                                 if [ -f "${trm_ntpfile}" ]; then
 248                                         uci_set "travelmate" "${trm_uplinkcfg}" "con_start" "$(date "+%Y.%m.%d-%H:%M:%S")"
 249                                 fi
 250                                 ;;
 251                         "refresh")
 252                                 if [ -f "${trm_ntpfile}" ] && [ -z "$(uci_get "travelmate" "${trm_uplinkcfg}" "con_start")" ]; then
 253                                         uci_set "travelmate" "${trm_uplinkcfg}" "con_start" "$(date "+%Y.%m.%d-%H:%M:%S")"
 254                                 fi
 255                                 ;;
 256                         "end")
 257                                 if [ -f "${trm_ntpfile}" ]; then
 258                                         uci_set "travelmate" "${trm_uplinkcfg}" "con_end" "$(date "+%Y.%m.%d-%H:%M:%S")"
 259                                 fi
 260                                 ;;
 261                         "start_expiry")
 262                                 if [ -f "${trm_ntpfile}" ]; then
 263                                         expiry="$(uci_get "travelmate" "${trm_uplinkcfg}" "con_start_expiry")"
 264                                         uci_set "travelmate" "${trm_uplinkcfg}" "enabled" "0"
 265                                         uci_set "travelmate" "${trm_uplinkcfg}" "con_end" "$(date "+%Y.%m.%d-%H:%M:%S")"
 266                                         f_log "info" "uplink '${radio}/${essid}/${bssid:-"-"}' expired after ${expiry} minutes"
 267                                 fi
 268                                 ;;
 269                         "end_expiry")
 270                                 if [ -f "${trm_ntpfile}" ]; then
 271                                         expiry="$(uci_get "travelmate" "${trm_uplinkcfg}" "con_end_expiry")"
 272                                         uci_set "travelmate" "${trm_uplinkcfg}" "enabled" "1"
 273                                         uci_remove "travelmate" "${trm_uplinkcfg}" "con_start" 2>/dev/null
 274                                         uci_remove "travelmate" "${trm_uplinkcfg}" "con_end" 2>/dev/null
 275                                         f_log "info" "uplink '${radio}/${essid}/${bssid:-"-"}' re-enabled after ${expiry} minutes"
 276                                 fi
 277                                 ;;
 278                         "disabled")
 279                                 uci_set "travelmate" "${trm_uplinkcfg}" "enabled" "0"
 280                                 if [ -f "${trm_ntpfile}" ]; then
 281                                         uci_set "travelmate" "${trm_uplinkcfg}" "con_end" "$(date "+%Y.%m.%d-%H:%M:%S")"
 282                                 fi
 283                                 ;;
 284                 esac
 285                 if [ -n "$(uci -q changes "travelmate")" ]; then
 286                         uci_commit "travelmate"
 287                         if [ ! -f "${trm_refreshfile}" ]; then
 288                                 printf "%s" "cfg_reload" >"${trm_refreshfile}"
 289                         fi
 290                 fi
 291         fi
 292         f_log "debug" "f_ctrack ::: action: ${action:-"-"}, uplink_config: ${trm_uplinkcfg:-"-"}"
 293 }
 294
 295 # get wan gateway addresses
 296 #
 297 f_getgw() {
 298         local result wan4_if wan4_gw wan6_if wan6_gw
 299
 300         network_flush_cache
 301         network_find_wan wan4_if
 302         network_find_wan6 wan6_if
 303         network_get_gateway wan4_gw "${wan4_if}"
 304         network_get_gateway6 wan6_gw "${wan6_if}"
 305         if [ -n "${wan4_gw}" ] || [ -n "${wan6_gw}" ]; then
 306                 result="${wan4_gw} ${wan6_gw}"
 307         fi
 308         printf "%s" "${result}"
 309         f_log "debug" "f_getgw  ::: wan4_gw: ${wan4_gw:-"-"}, wan6_gw: ${wan6_gw:-"-"}, result: ${result:-"-"}"
 310 }
 311
 312 # get uplink config section
 313 #
 314 f_getcfg() {
 315         local t_radio t_essid t_bssid radio="${1}" essid="${2}" bssid="${3}" cnt="0"
 316
 317         while uci_get "travelmate" "@uplink[${cnt}]" >/dev/null 2>&1; do
 318                 t_radio="$(uci_get "travelmate" "@uplink[${cnt}]" "device")"
 319                 t_essid="$(uci_get "travelmate" "@uplink[${cnt}]" "ssid")"
 320                 t_bssid="$(uci_get "travelmate" "@uplink[${cnt}]" "bssid")"
 321                 if [ -n "${radio}" ] && [ -n "${essid}" ] &&
 322                         [ "${t_radio}" = "${radio}" ] && [ "${t_essid}" = "${essid}" ] && [ "${t_bssid}" = "${bssid}" ]; then
 323                         trm_uplinkcfg="@uplink[${cnt}]"
 324                         break
 325                 fi
 326                 cnt="$((cnt + 1))"
 327         done
 328         f_log "debug" "f_getcfg ::: status: ${status}, section: ${section}, uplink_config: ${trm_uplinkcfg:-"-"}"
 329 }
 330
 331 # get travelmate option value in 'uplink' sections
 332 #
 333 f_getval() {
 334         local result t_option="${1}"
 335
 336         if [ -n "${trm_uplinkcfg}" ]; then
 337                 result="$(uci_get "travelmate" "${trm_uplinkcfg}" "${t_option}")"
 338                 printf "%s" "${result}"
 339         fi
 340         f_log "debug" "f_getval ::: option: ${t_option:-"-"}, result: ${result:-"-"}, uplink_config: ${trm_uplinkcfg:-"-"}"
 341 }
 342
 343 # set 'wifi-device' sections
 344 #
 345 f_setdev() {
 346         local disabled radio="${1}"
 347
 348         disabled="$(uci_get "wireless" "${radio}" "disabled")"
 349         if [ "${disabled}" = "1" ]; then
 350                 uci_set wireless "${radio}" "disabled" "0"
 351         fi
 352         if [ -n "${trm_radio}" ] && [ -z "${trm_radiolist}" ]; then
 353                 trm_radiolist="${trm_radio}"
 354         elif [ -z "${trm_radio}" ] && ! printf "%s" "${trm_radiolist}" | grep -q "${radio}"; then
 355                 trm_radiolist="$(f_trim "${trm_radiolist} ${radio}")"
 356         fi
 357         f_log "debug" "f_setdev ::: radio: ${radio:-"-"}, radio_list(cnf/cur): ${trm_radio:-"-"}/${trm_radiolist:-"-"}, disabled: ${disabled:-"-"}"
 358 }
 359
 360 # set 'wifi-iface' sections
 361 #
 362 f_setif() {
 363         local mode radio essid bssid enabled disabled con_start con_end con_start_expiry con_end_expiry section="${1}" proactive="${2}"
 364
 365         mode="$(uci_get "wireless" "${section}" "mode")"
 366         radio="$(uci_get "wireless" "${section}" "device")"
 367         essid="$(uci_get "wireless" "${section}" "ssid")"
 368         bssid="$(uci_get "wireless" "${section}" "bssid")"
 369         disabled="$(uci_get "wireless" "${section}" "disabled")"
 370
 371         f_getcfg "${radio}" "${essid}" "${bssid}"
 372
 373         enabled="$(f_getval "enabled")"
 374         con_start="$(f_getval "con_start")"
 375         con_end="$(f_getval "con_end")"
 376         con_start_expiry="$(f_getval "con_start_expiry")"
 377         con_end_expiry="$(f_getval "con_end_expiry")"
 378
 379         if [ "${enabled}" = "0" ] && [ -n "${con_end}" ] && [ -n "${con_end_expiry}" ] && [ "${con_end_expiry}" != "0" ]; then
 380                 d1="$(date -d "${con_end}" "+%s")"
 381                 d2="$(date "+%s")"
 382                 d3="$(((d2 - d1) / 60))"
 383                 if [ "${d3}" -ge "${con_end_expiry}" ]; then
 384                         enabled="1"
 385                         f_ctrack "end_expiry"
 386                 fi
 387         elif [ "${enabled}" = "1" ] && [ -n "${con_start}" ] && [ -n "${con_start_expiry}" ] && [ "${con_start_expiry}" != "0" ]; then
 388                 d1="$(date -d "${con_start}" "+%s")"
 389                 d2="$(date "+%s")"
 390                 d3="$((d1 + (con_start_expiry * 60)))"
 391                 if [ "${d2}" -gt "${d3}" ]; then
 392                         enabled="0"
 393                         f_ctrack "start_expiry"
 394                 fi
 395         fi
 396
 397         if [ "${mode}" = "sta" ]; then
 398                 if [ "${enabled}" = "0" ] || { { [ -z "${disabled}" ] || [ "${disabled}" = "0" ]; } &&
 399                         { [ "${proactive}" = "0" ] || [ "${trm_ifstatus}" != "true" ]; }; }; then
 400                         uci_set "wireless" "${section}" "disabled" "1"
 401                 elif [ "${enabled}" = "1" ] && [ "${disabled}" = "0" ] && [ "${trm_ifstatus}" = "true" ] && [ "${proactive}" = "1" ]; then
 402                         if [ -z "${trm_activesta}" ]; then
 403                                 trm_activesta="${section}"
 404                         else
 405                                 uci_set "wireless" "${section}" "disabled" "1"
 406                         fi
 407                 fi
 408                 if [ "${enabled}" = "1" ]; then
 409                         trm_stalist="$(f_trim "${trm_stalist} ${section}-${radio}")"
 410                 fi
 411         fi
 412         f_log "debug" "f_setif  ::: enabled: ${enabled}, section: ${section}, active_sta: ${trm_activesta:-"-"}, uplink_config: ${trm_uplinkcfg:-"-"}"
 413 }
 414
 415 # add open uplinks
 416 #
 417 f_addsta() {
 418         local uci_cfg new_uplink="1" offset="1" radio="${1}" essid="${2}"
 419
 420         if [ "${trm_maxautoadd}" = "0" ] || [ "${trm_opensta:-0}" -lt "${trm_maxautoadd}" ]; then
 421                 config_cb() {
 422                         local type="${1}" name="${2}"
 423
 424                         if [ "${type}" = "wifi-iface" ]; then
 425                                 if [ "$(uci_get "wireless.${name}.ssid")" = "${essid}" ] &&
 426                                         [ "$(uci_get "wireless.${name}.device")" = "${radio}" ]; then
 427                                         new_uplink="0"
 428                                         return 0
 429                                 fi
 430                                 offset="$((offset + 1))"
 431                         fi
 432                 }
 433                 config_load wireless
 434         else
 435                 new_uplink="0"
 436         fi
 437
 438         if [ "${new_uplink}" = "1" ]; then
 439                 uci_cfg="trm_uplink$((offset + 1))"
 440                 while [ -n "$(uci_get "wireless.${uci_cfg}")" ]; do
 441                         offset="$((offset + 1))"
 442                         uci_cfg="trm_uplink${offset}"
 443                 done
 444                 uci -q batch <<-EOC
 445                         set wireless."${uci_cfg}"="wifi-iface"
 446                         set wireless."${uci_cfg}".mode="sta"
 447                         set wireless."${uci_cfg}".network="${trm_iface}"
 448                         set wireless."${uci_cfg}".device="${radio}"
 449                         set wireless."${uci_cfg}".ssid="${essid}"
 450                         set wireless."${uci_cfg}".encryption="none"
 451                         set wireless."${uci_cfg}".disabled="1"
 452                 EOC
 453                 uci_cfg="$(uci -q add travelmate uplink)"
 454                 uci -q batch <<-EOC
 455                         set travelmate."${uci_cfg}".device="${radio}"
 456                         set travelmate."${uci_cfg}".ssid="${essid}"
 457                         set travelmate."${uci_cfg}".opensta="1"
 458                         set travelmate."${uci_cfg}".con_start_expiry="0"
 459                         set travelmate."${uci_cfg}".con_end_expiry="0"
 460                         set travelmate."${uci_cfg}".enabled="1"
 461                 EOC
 462                 if [ -n "$(uci -q changes "travelmate")" ] || [ -n "$(uci -q changes "wireless")" ]; then
 463                         trm_opensta="$((trm_opensta + 1))"
 464                         uci_commit "travelmate"
 465                         uci_commit "wireless"
 466                         f_wifi
 467                         if [ ! -f "${trm_refreshfile}" ]; then
 468                                 printf "%s" "ui_reload" >"${trm_refreshfile}"
 469                         fi
 470                         f_log "info" "open uplink '${radio}/${essid}' added to wireless config"
 471                 fi
 472         fi
 473         f_log "debug" "f_addsta ::: radio: ${radio:-"-"}, essid: ${essid}, opensta/maxautoadd: ${trm_opensta:-"-"}/${trm_maxautoadd:-"-"}, new_uplink: ${new_uplink}, offset: ${offset}"
 474 }
 475
 476 # check net status
 477 #
 478 f_net() {
 479         local err_msg raw html_raw html_cp json_raw json_ec json_rc json_cp json_ed result="net nok"
 480
 481         raw="$(${trm_fetch} --user-agent "${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}")"
 482         json_raw="${raw#*\{}"
 483         html_raw="${raw%%\{*}"
 484         if [ -n "${json_raw}" ]; then
 485                 json_ec="$(printf "%s" "{${json_raw}" | jsonfilter -q -l1 -e '@.exitcode')"
 486                 json_rc="$(printf "%s" "{${json_raw}" | jsonfilter -q -l1 -e '@.response_code')"
 487                 json_cp="$(printf "%s" "{${json_raw}" | jsonfilter -q -l1 -e '@.redirect_url' | awk 'BEGIN{FS="/"}{printf "%s",tolower($3)}')"
 488                 if [ "${json_ec}" = "0" ]; then
 489                         if [ -n "${json_cp}" ]; then
 490                                 result="net cp '${json_cp}'"
 491                         else
 492                                 if [ "${json_rc}" = "200" ] || [ "${json_rc}" = "204" ]; then
 493                                         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",$4;exit}')"
 494                                         if [ -n "${html_cp}" ]; then
 495                                                 result="net cp '${html_cp}'"
 496                                         else
 497                                                 result="net ok"
 498                                         fi
 499                                 fi
 500                         fi
 501                 else
 502                         err_msg="$(printf "%s" "{${json_raw}" | jsonfilter -q -l1 -e '@.errormsg')"
 503                         json_ed="$(printf "%s" "{${err_msg}" | awk '/([[:alnum:]_-]{1,63}\.)+[[:alpha:]]+$/{printf "%s",tolower($NF)}')"
 504                         if [ "${json_ec}" = "6" ]; then
 505                                 if [ -n "${json_ed}" ] && [ "${json_ed}" != "${trm_captiveurl#http*://*}" ]; then
 506                                         result="net cp '${json_ed}'"
 507                                 fi
 508                         elif [ "${json_ec}" = "28" ]; then
 509                                 if [ -n "$(f_getgw)" ]; then
 510                                         result="net ok"
 511                                 fi
 512                         fi
 513                 fi
 514         fi
 515         printf "%s" "${result}"
 516         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: ${trm_useragent}"
 517 }
 518
 519 # check interface status
 520 #
 521 f_check() {
 522         local ifname radio dev_status result login_script login_script_args cp_domain wait_time="1" enabled="1" mode="${1}" status="${2}" sta_radio="${3}" sta_essid="${4}" sta_bssid="${5}"
 523
 524         if [ "${mode}" = "initial" ] || [ "${mode}" = "dev" ]; then
 525                 json_get_var station_id "station_id"
 526                 sta_radio="${station_id%%/*}"
 527                 sta_essid="${station_id%/*}"
 528                 sta_essid="${sta_essid#*/}"
 529                 sta_bssid="${station_id##*/}"
 530                 sta_bssid="${sta_bssid//-/}"
 531         fi
 532         f_getcfg "${sta_radio}" "${sta_essid}" "${sta_bssid}"
 533
 534         if [ "${mode}" != "rev" ] && [ -n "${sta_radio}" ] && [ "${sta_radio}" != "-" ] && [ -n "${sta_essid}" ] && [ "${sta_essid}" != "-" ]; then
 535                 enabled="$(f_getval "enabled")"
 536         fi
 537         if { [ "${mode}" != "initial" ] && [ "${mode}" != "dev" ] && [ "${status}" = "false" ]; } ||
 538                 { [ "${mode}" = "dev" ] && { [ "${status}" = "false" ] || { [ "${trm_ifstatus}" != "${status}" ] && [ "${enabled}" = "0" ]; }; }; }; then
 539                 f_wifi
 540         fi
 541         while [ "${wait_time}" -le "${trm_maxwait}" ]; do
 542                 dev_status="$(ubus -S call network.wireless status 2>/dev/null)"
 543                 if [ -n "${dev_status}" ]; then
 544                         if [ "${mode}" = "dev" ]; then
 545                                 if [ "${trm_ifstatus}" != "${status}" ]; then
 546                                         trm_ifstatus="${status}"
 547                                         f_jsnup
 548                                 fi
 549                                 if [ "${status}" = "false" ]; then
 550                                         sleep "$((trm_maxwait / 5))"
 551                                 fi
 552                                 break
 553                         elif [ "${mode}" = "rev" ]; then
 554                                 unset trm_connection
 555                                 trm_ifstatus="${status}"
 556                                 break
 557                         else
 558                                 ifname="$(printf "%s" "${dev_status}" | jsonfilter -q -l1 -e '@.*.interfaces[@.config.mode="sta"].ifname')"
 559                                 if [ -n "${ifname}" ] && [ "${enabled}" = "1" ]; then
 560                                         trm_ifquality="$(${trm_iwinfo} "${ifname}" info 2>/dev/null | awk -F '[ ]' '/Link Quality:/{split($NF,var0,"/");printf "%i\n",(var0[1]*100/var0[2])}')"
 561                                         if [ "${trm_ifquality}" -ge "${trm_minquality}" ]; then
 562                                                 trm_ifstatus="$(ubus -S call network.interface dump 2>/dev/null | jsonfilter -q -l1 -e "@.interface[@.device=\"${ifname}\"].up")"
 563                                                 if [ "${trm_ifstatus}" = "true" ]; then
 564                                                         result="$(f_net)"
 565                                                         if [ "${trm_captive}" = "1" ]; then
 566                                                                 while true; do
 567                                                                         cp_domain="$(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 '${cp_domain}' added to to dhcp rebind whitelist"
 574                                                                         else
 575                                                                                 break
 576                                                                         fi
 577                                                                         result="$(f_net)"
 578                                                                 done
 579                                                                 if [ -n "${cp_domain}" ]; then
 580                                                                         trm_connection="${result:-"-"}/${trm_ifquality}"
 581                                                                         f_jsnup
 582                                                                         login_script="$(f_getval "script")"
 583                                                                         if [ -x "${login_script}" ]; then
 584                                                                                 login_script_args="$(f_getval "script_args")"
 585                                                                                 "${login_script}" ${login_script_args} >/dev/null 2>&1
 586                                                                                 rc="${?}"
 587                                                                                 if [ "${rc}" = "255" ]; then
 588                                                                                         f_log "info" "captive portal login script for '${cp_domain}' failed with rc '${rc}'"
 589                                                                                         unset trm_connection
 590                                                                                         trm_ifstatus="${status}"
 591                                                                                         f_jsnup
 592                                                                                         break
 593                                                                                 else
 594                                                                                         f_log "info" "captive portal login script for '${cp_domain}' has been finished  with rc '${rc}'"
 595                                                                                         if [ "${rc}" = "0" ]; then
 596                                                                                                 result="$(f_net)"
 597                                                                                         fi
 598                                                                                 fi
 599                                                                         fi
 600                                                                 fi
 601                                                         fi
 602                                                         if [ "${trm_netcheck}" = "1" ] && [ "${result}" = "net nok" ]; then
 603                                                                 f_log "info" "uplink has no internet"
 604                                                                 f_vpn "disable"
 605                                                                 trm_ifstatus="${status}"
 606                                                                 f_jsnup
 607                                                                 break
 608                                                         fi
 609                                                         trm_connection="${result:-"-"}/${trm_ifquality}"
 610                                                         f_jsnup
 611                                                         break
 612                                                 fi
 613                                         elif [ -n "${trm_connection}" ] && { [ "${trm_netcheck}" = "1" ] || [ "${mode}" = "initial" ]; }; then
 614                                                 f_log "info" "uplink is out of range (${trm_ifquality}/${trm_minquality})"
 615                                                 f_vpn "disable"
 616                                                 unset trm_connection
 617                                                 trm_ifstatus="${status}"
 618                                                 f_ctrack "end"
 619                                                 f_jsnup
 620                                                 break
 621                                         elif [ "${mode}" = "initial" ] || [ "${mode}" = "sta" ]; then
 622                                                 unset trm_connection
 623                                                 trm_ifstatus="${status}"
 624                                                 f_jsnup
 625                                                 break
 626                                         fi
 627                                 elif [ -n "${trm_connection}" ]; then
 628                                         f_vpn "disable"
 629                                         unset trm_connection
 630                                         trm_ifstatus="${status}"
 631                                         f_jsnup
 632                                         break
 633                                 elif [ "${mode}" = "initial" ]; then
 634                                         trm_ifstatus="${status}"
 635                                         f_jsnup
 636                                         break
 637                                 fi
 638                         fi
 639                 fi
 640                 if [ "${mode}" = "initial" ]; then
 641                         trm_ifstatus="${status}"
 642                         f_jsnup
 643                         break
 644                 fi
 645                 wait_time="$((wait_time + 1))"
 646                 sleep 1
 647         done
 648         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: ${trm_netcheck}"
 649 }
 650
 651 # update runtime information
 652 #
 653 f_jsnup() {
 654         local vpn section last_date last_station sta_iface sta_radio sta_essid sta_bssid sta_mac dev_status last_status status="${trm_ifstatus}" ntp_done="0" vpn_done="0" mail_done="0"
 655
 656         if [ "${status}" = "true" ]; then
 657                 status="connected (${trm_connection:-"-"})"
 658                 dev_status="$(ubus -S call network.wireless status 2>/dev/null)"
 659                 section="$(printf "%s" "${dev_status}" | jsonfilter -q -l1 -e '@.*.interfaces[@.config.mode="sta"].section')"
 660                 if [ -n "${section}" ]; then
 661                         sta_iface="$(uci_get "wireless" "${section}" "network")"
 662                         sta_radio="$(uci_get "wireless" "${section}" "device")"
 663                         sta_essid="$(uci_get "wireless" "${section}" "ssid")"
 664                         sta_bssid="$(uci_get "wireless" "${section}" "bssid")"
 665                         sta_mac="$(f_mac "get" "${section}")"
 666                         f_getcfg "${sta_radio}" "${sta_essid}" "${sta_bssid}"
 667                         vpn="$(f_getval "vpn")"
 668                 fi
 669                 json_get_var last_date "last_run"
 670                 json_get_var last_station "station_id"
 671                 json_get_var last_status "travelmate_status"
 672
 673                 if { [ -f "${trm_ntpfile}" ] && [ ! -s "${trm_ntpfile}" ]; } || [ "${last_status}" = "running (not connected)" ] ||
 674                         { [ -n "${last_station}" ] && [ "${last_station}" != "${sta_radio:-"-"}/${sta_essid:-"-"}/${sta_bssid:-"-"}" ]; }; then
 675                         last_date="$(date "+%Y.%m.%d-%H:%M:%S")"
 676                         if [ -f "${trm_ntpfile}" ] && [ ! -s "${trm_ntpfile}" ]; then
 677                                 printf "%s" "${last_date}" >"${trm_ntpfile}"
 678                         fi
 679                 fi
 680         elif [ "${status}" = "error" ]; then
 681                 unset trm_connection
 682                 status="program error"
 683         else
 684                 unset trm_connection
 685                 status="running (not connected)"
 686         fi
 687         if [ -z "${last_date}" ]; then
 688                 last_date="$(date "+%Y.%m.%d-%H:%M:%S")"
 689         fi
 690         if [ -s "${trm_ntpfile}" ]; then
 691                 ntp_done="1"
 692         fi
 693         if [ "${vpn}" = "1" ] && [ -f "${trm_vpnfile}" ]; then
 694                 vpn_done="1"
 695         fi
 696         if [ "${trm_mail}" = "1" ] && [ -f "${trm_mailfile}" ]; then
 697                 mail_done="1"
 698         fi
 699         json_add_string "travelmate_status" "${status}"
 700         json_add_string "travelmate_version" "${trm_ver}"
 701         json_add_string "station_id" "${sta_radio:-"-"}/${sta_essid:-"-"}/${sta_bssid:-"-"}"
 702         json_add_string "station_mac" "${sta_mac:-"-"}"
 703         json_add_string "station_interface" "${sta_iface:-"-"}"
 704         json_add_string "wpa_flags" "${trm_wpaflags:-"-"}"
 705         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})"
 706         json_add_string "ext_hooks" "ntp: $(f_char ${ntp_done}), vpn: $(f_char ${vpn_done}), mail: $(f_char ${mail_done})"
 707         json_add_string "last_run" "${last_date}"
 708         json_add_string "system" "${trm_sysver}"
 709         json_dump >"${trm_rtfile}"
 710
 711         if [ "${status%% (net ok/*}" = "connected" ] && [ "${trm_mail}" = "1" ] && [ -x "${trm_mailpgm}" ] && [ "${ntp_done}" = "1" ] && [ "${mail_done}" = "0" ]; then
 712                 if [ "${vpn}" != "1" ] || [ "${vpn_done}" = "1" ]; then
 713                         : >"${trm_mailfile}"
 714                         "${trm_mailpgm}" >/dev/null 2>&1
 715                 fi
 716         fi
 717         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}"
 718 }
 719
 720 # write to syslog
 721 #
 722 f_log() {
 723         local class="${1}" log_msg="${2}"
 724
 725         if [ -n "${log_msg}" ] && { [ "${class}" != "debug" ] || [ "${trm_debug}" = "1" ]; }; then
 726                 if [ -x "${trm_logger}" ]; then
 727                         "${trm_logger}" -p "${class}" -t "trm-${trm_ver}[${$}]" "${log_msg}"
 728                 else
 729                         printf "%s %s %s\n" "${class}" "trm-${trm_ver}[${$}]" "${log_msg}"
 730                 fi
 731                 if [ "${class}" = "err" ]; then
 732                         trm_ifstatus="error"
 733                         f_jsnup
 734                         : >"${trm_pidfile}"
 735                         exit 1
 736                 fi
 737         fi
 738 }
 739
 740 # main function for connection handling
 741 #
 742 f_main() {
 743         local radio cnt retrycnt scan_dev scan_list scan_essid scan_bssid scan_open scan_quality
 744         local station_id section sta sta_essid sta_bssid sta_radio sta_mac config_essid config_bssid config_radio
 745
 746         f_check "initial" "false"
 747         f_log "debug" "f_main-1 ::: status: ${trm_ifstatus}, proactive: ${trm_proactive}"
 748         if [ "${trm_ifstatus}" != "true" ] || [ "${trm_proactive}" = "1" ]; then
 749                 config_load wireless
 750                 config_foreach f_setif wifi-iface "${trm_proactive}"
 751                 if [ "${trm_ifstatus}" = "true" ] && [ -n "${trm_activesta}" ] && [ "${trm_proactive}" = "1" ]; then
 752                         json_get_var station_id "station_id"
 753                         config_radio="${station_id%%/*}"
 754                         config_essid="${station_id%/*}"
 755                         config_essid="${config_essid#*/}"
 756                         config_bssid="${station_id##*/}"
 757                         config_bssid="${config_bssid//-/}"
 758                         f_check "dev" "true"
 759                         f_log "debug" "f_main-2 ::: config_radio: ${config_radio}, config_essid: \"${config_essid}\", config_bssid: ${config_bssid:-"-"}"
 760                 else
 761                         uci_commit "wireless"
 762                         f_check "dev" "false"
 763                 fi
 764                 f_log "debug" "f_main-3 ::: radio_list: ${trm_radiolist:-"-"}, sta_list: ${trm_stalist:-"-"}"
 765
 766                 # radio loop
 767                 #
 768                 for radio in ${trm_radiolist}; do
 769                         if ! printf "%s" "${trm_stalist}" | grep -q "\\-${radio}"; then
 770                                 if [ "${trm_autoadd}" = "0" ]; then
 771                                         f_log "info" "no enabled station on radio '${radio}'"
 772                                         continue
 773                                 fi
 774                         fi
 775                         scan_list=""
 776
 777                         # station loop
 778                         #
 779                         for sta in ${trm_stalist:-"${radio}"}; do
 780                                 if [ "${sta}" != "${radio}" ]; then
 781                                         section="${sta%%-*}"
 782                                         sta_radio="$(uci_get "wireless" "${section}" "device")"
 783                                         sta_essid="$(uci_get "wireless" "${section}" "ssid")"
 784                                         sta_bssid="$(uci_get "wireless" "${section}" "bssid")"
 785                                         sta_mac="$(f_mac "get" "${section}")"
 786                                         if [ -z "${sta_radio}" ] || [ -z "${sta_essid}" ]; then
 787                                                 f_log "info" "invalid wireless section '${section}'"
 788                                                 continue
 789                                         fi
 790                                         if [ -n "${trm_connection}" ] && [ "${radio}" = "${config_radio}" ] && [ "${sta_radio}" = "${config_radio}" ] &&
 791                                                 [ "${sta_essid}" = "${config_essid}" ] && [ "${sta_bssid}" = "${config_bssid}" ]; then
 792                                                 f_ctrack "refresh"
 793                                                 f_log "info" "uplink still in range '${config_radio}/${config_essid}/${config_bssid:-"-"}' with mac '${sta_mac:-"-"}'"
 794                                                 f_vpn "enable"
 795                                                 return 0
 796                                         fi
 797                                         f_log "debug" "f_main-4 ::: sta_radio: ${sta_radio}, sta_essid: \"${sta_essid}\", sta_bssid: ${sta_bssid:-"-"}"
 798                                 fi
 799                                 if [ -z "${scan_list}" ]; then
 800                                         scan_dev="$(ubus -S call network.wireless status 2>/dev/null | jsonfilter -q -l1 -e "@.${radio}.interfaces[0].ifname")"
 801                                         scan_list="$("${trm_iwinfo}" "${scan_dev:-${radio}}" scan 2>/dev/null |
 802                                                 awk 'BEGIN{FS="[[:space:]]"}/Address:/{var1=$NF}/ESSID:/{var2="";for(i=12;i<=NF;i++)if(var2==""){var2=$i}else{var2=var2" "$i}}
 803                                                 /Quality:/{split($NF,var0,"/")}/Encryption:/{if($NF=="none"){var3="+"}else{var3="-"};
 804                                                 printf "%i %s %s %s\n",(var0[1]*100/var0[2]),var3,var1,var2}' | sort -rn | head -qn "${trm_maxscan}")"
 805                                         f_log "debug" "f_main-5 ::: radio: ${radio}, scan_device: ${scan_dev}, scan_max: ${trm_maxscan}"
 806                                         if [ -z "${scan_list}" ]; then
 807                                                 f_log "info" "no scan results on '${radio}'"
 808                                                 continue 2
 809                                         fi
 810                                 fi
 811
 812                                 # scan loop
 813                                 #
 814                                 while read -r scan_quality scan_open scan_bssid scan_essid; do
 815                                         if [ -n "${scan_quality}" ] && [ -n "${scan_open}" ] && [ -n "${scan_bssid}" ] && [ -n "${scan_essid}" ]; then
 816                                                 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: ${scan_open}"
 817                                                 if [ "${scan_quality}" -ge "${trm_minquality}" ]; then
 818                                                         if { { [ "${scan_essid}" = "\"${sta_essid}\"" ] && { [ -z "${sta_bssid}" ] || [ "${scan_bssid}" = "${sta_bssid}" ]; }; } ||
 819                                                                 { [ "${scan_bssid}" = "${sta_bssid}" ] && [ "${scan_essid}" = "unknown" ]; }; } && [ "${radio}" = "${sta_radio}" ]; then
 820                                                                 if [ -n "${config_radio}" ]; then
 821                                                                         f_vpn "disable"
 822                                                                         uci_set "wireless" "${trm_activesta}" "disabled" "1"
 823                                                                         uci_commit "wireless"
 824                                                                         f_check "rev" "false"
 825                                                                         f_ctrack "end"
 826                                                                         f_log "info" "uplink connection terminated '${config_radio}/${config_essid}/${config_bssid:-"-"}'"
 827                                                                         unset config_radio config_essid config_bssid
 828                                                                 fi
 829
 830                                                                 # retry loop
 831                                                                 #
 832                                                                 retrycnt="1"
 833                                                                 f_getcfg "${sta_radio}" "${sta_essid}" "${sta_bssid}"
 834                                                                 while [ "${retrycnt}" -le "${trm_maxretry}" ]; do
 835                                                                         sta_mac="$(f_mac "set" "${section}")"
 836                                                                         uci_set "wireless" "${section}" "disabled" "0"
 837                                                                         f_check "sta" "false" "${sta_radio}" "${sta_essid}" "${sta_bssid}"
 838                                                                         if [ "${trm_ifstatus}" = "true" ]; then
 839                                                                                 rm -f "${trm_mailfile}"
 840                                                                                 uci_commit "wireless"
 841                                                                                 f_ctrack "start"
 842                                                                                 f_log "info" "connected to uplink '${sta_radio}/${sta_essid}/${sta_bssid:-"-"}' with mac '${sta_mac:-"-"}' (${retrycnt}/${trm_maxretry})"
 843                                                                                 f_vpn "enable"
 844                                                                                 return 0
 845                                                                         else
 846                                                                                 uci -q revert "wireless"
 847                                                                                 f_check "rev" "false"
 848                                                                                 if [ "${retrycnt}" = "${trm_maxretry}" ]; then
 849                                                                                         f_ctrack "disabled"
 850                                                                                         f_log "info" "uplink has been disabled '${sta_radio}/${sta_essid}/${sta_bssid:-"-"}' (${retrycnt}/${trm_maxretry})"
 851                                                                                         break 2
 852                                                                                 else
 853                                                                                         f_jsnup
 854                                                                                         f_log "info" "can't connect to uplink '${sta_radio}/${sta_essid}/${sta_bssid:-"-"}' (${retrycnt}/${trm_maxretry})"
 855                                                                                 fi
 856                                                                         fi
 857                                                                         retrycnt="$((retrycnt + 1))"
 858                                                                         sleep "$((trm_maxwait / 6))"
 859                                                                 done
 860                                                         elif [ "${trm_autoadd}" = "1" ] && [ "${scan_open}" = "+" ] && [ "${scan_essid}" != "unknown" ]; then
 861                                                                 scan_essid="${scan_essid%?}"
 862                                                                 scan_essid="${scan_essid:1}"
 863                                                                 f_addsta "${radio}" "${scan_essid}"
 864                                                         fi
 865                                                 fi
 866                                         fi
 867                                 done <<-EOV
 868                                         ${scan_list}
 869                                 EOV
 870                         done
 871                 done
 872         fi
 873 }
 874
 875 # source required system libraries
 876 #
 877 if [ -r "/lib/functions.sh" ] && [ -r "/lib/functions/network.sh" ] && [ -r "/usr/share/libubox/jshn.sh" ]; then
 878         . "/lib/functions.sh"
 879         . "/lib/functions/network.sh"
 880         . "/usr/share/libubox/jshn.sh"
 881 else
 882         f_log "err" "system libraries not found"
 883 fi
 884
 885 # control travelmate actions
 886 #
 887 while true; do
 888         if [ "${trm_action}" = "stop" ]; then
 889                 if [ -s "${trm_pidfile}" ]; then
 890                         f_log "info" "travelmate instance stopped ::: action: ${trm_action}, pid: $(cat ${trm_pidfile} 2>/dev/null)"
 891                         : >"${trm_rtfile}"
 892                         : >"${trm_pidfile}"
 893                 fi
 894                 break
 895         elif [ -n "${trm_action}" ]; then
 896                 f_log "info" "travelmate instance started ::: action: ${trm_action}, pid: ${$}"
 897                 f_env
 898                 f_main
 899                 unset trm_action
 900         fi
 901         while true; do
 902                 sleep "${trm_timeout}" 0
 903                 rc="${?}"
 904                 if [ "${rc}" != "0" ]; then
 905                         if [ -z "$(f_getgw)" ]; then
 906                                 rc="0"
 907                         fi
 908                 fi
 909                 if [ "${rc}" = "0" ]; then
 910                         break
 911                 fi
 912         done
 913         json_cleanup
 914         f_env
 915         f_main
 916 done