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333 lines
12 KiB
333 lines
12 KiB
#!/bin/sh
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# travelmate, a wlan connection manager for travel router
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# written by Dirk Brenken (dev@brenken.org)
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# This is free software, licensed under the GNU General Public License v3.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# set initial defaults
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#
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LC_ALL=C
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PATH="/usr/sbin:/usr/bin:/sbin:/bin"
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trm_ver="1.0.2"
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trm_sysver="unknown"
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trm_enabled=0
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trm_debug=0
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trm_automatic=1
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trm_maxretry=3
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trm_maxwait=30
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trm_timeout=60
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trm_iwinfo="$(command -v iwinfo)"
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trm_radio=""
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trm_rtfile="/tmp/trm_runtime.json"
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trm_wpa="$(command -v wpa_supplicant)"
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# load travelmate environment
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#
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f_envload()
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{
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local sys_call sys_desc sys_model sys_ver
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# get system information
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#
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sys_call="$(ubus -S call system board 2>/dev/null)"
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if [ -n "${sys_call}" ]
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then
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sys_desc="$(printf '%s' "${sys_call}" | jsonfilter -e '@.release.description')"
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sys_model="$(printf '%s' "${sys_call}" | jsonfilter -e '@.model')"
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sys_ver="$(cat /etc/turris-version 2>/dev/null)"
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if [ -n "${sys_ver}" ]
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then
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sys_desc="${sys_desc}/${sys_ver}"
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fi
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trm_sysver="${sys_model}, ${sys_desc}"
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fi
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# initialize lists
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#
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trm_devlist=""
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trm_stalist=""
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trm_radiolist=""
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# load uci config and check 'enabled' option
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#
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option_cb()
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{
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local option="${1}"
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local value="${2}"
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eval "${option}=\"${value}\""
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}
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config_load travelmate
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if [ ${trm_enabled} -ne 1 ]
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then
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f_log "info" "travelmate is currently disabled, please set 'trm_enabled' to '1' to use this service"
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exit 0
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fi
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# check eap capabilities
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#
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trm_eap="$("${trm_wpa}" -veap >/dev/null 2>&1; printf "%u" ${?})"
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}
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# gather radio information & bring down all STA interfaces
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#
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f_prep()
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{
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local config="${1}"
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local mode="$(uci -q get wireless."${config}".mode)"
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local network="$(uci -q get wireless."${config}".network)"
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local radio="$(uci -q get wireless."${config}".device)"
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local disabled="$(uci -q get wireless."${config}".disabled)"
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local eaptype="$(uci -q get wireless."${config}".eap_type)"
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if ([ -z "${trm_radio}" ] || [ "${trm_radio}" = "${radio}" ]) && \
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[ -z "$(printf "%s" "${trm_radiolist}" | grep -Fo " ${radio}")" ]
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then
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trm_radiolist="${trm_radiolist} ${radio}"
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fi
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if [ "${mode}" = "sta" ] && [ "${network}" = "${trm_iface}" ]
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then
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if [ -z "${disabled}" ] || [ "${disabled}" = "0" ]
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then
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uci -q set wireless."${config}".disabled=1
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fi
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if [ -z "${eaptype}" ] || [ ${trm_eap} -eq 0 ]
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then
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trm_stalist="${trm_stalist} ${config}_${radio}"
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fi
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fi
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f_log "debug" "f_prep ::: config: ${config}, mode: ${mode}, network: ${network}, radio: ${radio}, disabled: ${disabled}"
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}
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# check interface status
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#
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f_check()
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{
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local ifname radio dev_status cnt=1 mode="${1}" status="${2:-"false"}"
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trm_ifstatus="false"
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ubus call network reload
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while [ ${cnt} -le ${trm_maxwait} ]
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do
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dev_status="$(ubus -S call network.wireless status 2>/dev/null)"
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if [ -n "${dev_status}" ]
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then
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if [ "${mode}" = "dev" ]
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then
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if [ "${trm_ifstatus}" != "${status}" ]
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then
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trm_ifstatus="${status}"
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f_jsnup
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fi
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for radio in ${trm_radiolist}
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do
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trm_ifstatus="$(printf "%s" "${dev_status}" | jsonfilter -l1 -e "@.${radio}.up")"
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if [ "${trm_ifstatus}" = "true" ] && [ -z "$(printf "%s" "${trm_devlist}" | grep -Fo " ${radio}")" ]
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then
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trm_devlist="${trm_devlist} ${radio}"
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fi
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done
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if [ "${trm_radiolist}" = "${trm_devlist}" ] || [ ${cnt} -eq ${trm_maxwait} ] || [ "${status}" = "false" ]
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then
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ifname="${trm_devlist}"
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break
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fi
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else
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ifname="$(printf "%s" "${dev_status}" | jsonfilter -l1 -e '@.*.interfaces[@.config.mode="sta"].ifname')"
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if [ -n "${ifname}" ]
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then
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trm_ifstatus="$(ubus -S call network.interface dump 2>/dev/null | jsonfilter -l1 -e "@.interface[@.device=\"${ifname}\"].up")"
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fi
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fi
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if [ "${mode}" = "initial" ] || [ "${trm_ifstatus}" = "true" ]
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then
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if [ "${mode}" != "initial" ] && [ "${trm_ifstatus}" != "${status}" ]
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then
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f_jsnup
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fi
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break
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fi
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fi
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cnt=$((cnt+1))
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sleep 1
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done
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f_log "debug" "f_check::: mode: ${mode}, name: ${ifname}, status: ${trm_ifstatus}, cnt: ${cnt}, max-wait: ${trm_maxwait}, automatic: ${trm_automatic}"
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}
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# update runtime information
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#
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f_jsnup()
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{
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local status iface="${1}" radio="${2}" essid="${3}" bssid="${4}"
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if [ "${trm_ifstatus}" = "true" ]
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then
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status="connected"
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elif [ "${trm_ifstatus}" = "false" ]
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then
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status="not connected"
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elif [ "${trm_ifstatus}" = "running" ]
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then
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status="running"
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elif [ "${trm_ifstatus}" = "error" ]
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then
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status="error"
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fi
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json_init
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json_add_object "data"
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json_add_string "travelmate_status" "${status}"
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json_add_string "travelmate_version" "${trm_ver}"
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json_add_string "station_id" "${essid:-"-"}/${bssid:-"-"}"
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json_add_string "station_interface" "${iface:-"n/a"}"
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json_add_string "station_radio" "${radio:-"n/a"}"
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json_add_string "last_rundate" "$(/bin/date "+%d.%m.%Y %H:%M:%S")"
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json_add_string "system" "${trm_sysver}"
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json_close_object
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json_dump > "${trm_rtfile}"
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}
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# write to syslog
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#
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f_log()
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{
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local class="${1}"
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local log_msg="${2}"
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if [ -n "${log_msg}" ] && ([ "${class}" != "debug" ] || [ ${trm_debug} -eq 1 ])
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then
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logger -p "${class}" -t "travelmate-[${trm_ver}]" "${log_msg}"
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if [ "${class}" = "err" ]
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then
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trm_ifstatus="error"
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f_jsnup
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logger -p "${class}" -t "travelmate-[${trm_ver}]" "Please check 'https://github.com/openwrt/packages/blob/master/net/travelmate/files/README.md' (${trm_sysver})"
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exit 1
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fi
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fi
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}
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# main function for connection handling
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#
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f_main()
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{
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local dev config raw_scan essid_list bssid_list sta_essid sta_bssid sta_radio sta_iface cnt=1
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f_check "initial"
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if [ "${trm_ifstatus}" != "true" ]
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then
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config_load wireless
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config_foreach f_prep wifi-iface
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if [ -n "$(uci -q changes wireless)" ]
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then
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uci -q commit wireless
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fi
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f_check "dev" "running"
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f_log "debug" "f_main ::: iwinfo: ${trm_iwinfo}, eap_rc: ${trm_eap}, dev_list: ${trm_devlist}, sta_list: ${trm_stalist}"
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for dev in ${trm_devlist}
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do
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cnt=1
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if [ -z "$(printf "%s" "${trm_stalist}" | grep -Fo "_${dev}")" ]
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then
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continue
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fi
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while [ ${trm_maxretry} -eq 0 ] || [ ${cnt} -le ${trm_maxretry} ]
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do
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raw_scan="$(${trm_iwinfo} "${dev}" scan)"
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essid_list="$(printf "%s" "${raw_scan}" | awk '/ESSID: "/{ORS=" ";if (!seen[$0]++) for(i=2; i<=NF; i++) print $i}')"
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bssid_list="$(printf "%s" "${raw_scan}" | awk '/Address: /{ORS=" ";if (!seen[$5]++) print $5}')"
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f_log "debug" "f_main ::: dev: ${dev}, ssid_list: ${essid_list}, bssid_list: ${bssid_list}"
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if [ -n "${essid_list}" ] || [ -n "${bssid_list}" ]
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then
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for sta in ${trm_stalist}
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do
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config="${sta%%_*}"
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sta_radio="${sta##*_}"
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sta_essid="$(uci -q get wireless."${config}".ssid)"
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sta_bssid="$(uci -q get wireless."${config}".bssid)"
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sta_iface="$(uci -q get wireless."${config}".network)"
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if (([ -n "$(printf "%s" "${essid_list}" | grep -Fo "\"${sta_essid}\"")" ] && [ -z "${sta_bssid}" ]) || \
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([ -n "$(printf "%s" "${bssid_list}" | grep -Fo "${sta_bssid}")" ] && [ -z "$(printf "%s" "${essid_list}" | grep -Fo "\"${sta_essid}\"")" ]) || \
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([ -n "$(printf "%s" "${essid_list}" | grep -Fo "\"${sta_essid}\"")" ] && [ -n "$(printf "%s" "${bssid_list}" | grep -Fo "${sta_bssid}")" ])) && \
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[ "${dev}" = "${sta_radio}" ]
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then
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uci -q set wireless."${config}".disabled=0
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f_check "sta"
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if [ "${trm_ifstatus}" = "true" ]
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then
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uci -q commit wireless
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f_log "info" "interface '${sta_iface}' on '${sta_radio}' connected to uplink '${sta_essid:-"-"}/${sta_bssid:-"-"}' (${trm_sysver})"
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f_jsnup "${sta_iface}" "${sta_radio}" "${sta_essid}" "${sta_bssid}"
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return 0
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elif [ ${trm_maxretry} -ne 0 ] && [ ${cnt} -eq ${trm_maxretry} ]
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then
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uci -q set wireless."${config}".disabled=1
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if [ -n "${sta_essid}" ]
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then
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uci -q set wireless."${config}".ssid="${sta_essid}_err"
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fi
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if [ -n "${sta_bssid}" ]
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then
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uci -q set wireless."${config}".bssid="${sta_bssid}_err"
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fi
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uci -q commit wireless
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f_check "dev"
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f_log "info" "can't connect to uplink '${sta_essid:-"-"}/${sta_bssid:-"-"}' (${cnt}/${trm_maxretry}), uplink disabled (${trm_sysver})"
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else
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if [ ${trm_maxretry} -eq 0 ]
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then
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cnt=0
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fi
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uci -q revert wireless
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f_check "dev"
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f_log "info" "can't connect to uplink '${sta_essid:-"-"}/${sta_bssid:-"-"}' (${cnt}/${trm_maxretry}) (${trm_sysver})"
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fi
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f_jsnup "${sta_iface}" "${sta_radio}" "${sta_essid}" "${sta_bssid}"
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fi
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done
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fi
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cnt=$((cnt+1))
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sleep 5
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done
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done
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if [ ! -s "${trm_rtfile}" ]
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then
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trm_ifstatus="false"
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f_jsnup
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fi
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else
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if [ ! -s "${trm_rtfile}" ]
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then
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config="$(ubus -S call network.wireless status | jsonfilter -l1 -e '@.*.interfaces[@.config.mode="sta"].section')"
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sta_radio="$(uci -q get wireless."${config}".device)"
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sta_essid="$(uci -q get wireless."${config}".ssid)"
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sta_bssid="$(uci -q get wireless."${config}".bssid)"
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sta_iface="$(uci -q get wireless."${config}".network)"
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f_jsnup "${sta_iface}" "${sta_radio}" "${sta_essid}" "${sta_bssid}"
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fi
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fi
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}
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# source required system libraries
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#
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if [ -r "/lib/functions.sh" ] && [ -r "/usr/share/libubox/jshn.sh" ]
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then
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. "/lib/functions.sh"
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. "/usr/share/libubox/jshn.sh"
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else
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f_log "err" "system libraries not found"
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fi
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# control travelmate actions
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#
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f_envload
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f_main
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while [ ${trm_automatic} -eq 1 ]
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do
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sleep ${trm_timeout}
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f_envload
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f_main
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done
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exit 0
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