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413 lines
16 KiB
413 lines
16 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="1.2.0"
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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_captive=1
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trm_captiveurl="http://captive.apple.com"
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trm_minquality=35
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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_radio=""
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trm_connection=""
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trm_rtfile="/tmp/trm_runtime.json"
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trm_fetch="$(command -v uclient-fetch)"
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trm_iwinfo="$(command -v iwinfo)"
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trm_wpa="$(command -v wpa_supplicant)"
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trm_action="${1:-"start"}"
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trm_pidfile="/var/run/travelmate.pid"
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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}, ${sys_desc}"
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fi
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# (re-)initialize global list variables
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#
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trm_devlist=""
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trm_stalist=""
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trm_radiolist=""
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# load config and check 'enabled' option
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#
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option_cb()
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{
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local option="${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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config_load wireless
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config_foreach f_prep wifi-iface
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uci_commit wireless
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ubus call network reload
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exit 0
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fi
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# validate input ranges
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#
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if [ ${trm_minquality} -lt 20 ] || [ ${trm_minquality} -gt 80 ]
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then
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trm_minquality=35
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fi
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if [ ${trm_maxretry} -lt 1 ] || [ ${trm_maxretry} -gt 10 ]
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then
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trm_maxretry=3
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fi
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if [ ${trm_maxwait} -lt 20 ] || [ ${trm_maxwait} -gt 40 ] || [ ${trm_maxwait} -ge ${trm_timeout} ]
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then
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trm_maxwait=30
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fi
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if [ ${trm_timeout} -lt 30 ] || [ ${trm_timeout} -gt 300 ] || [ ${trm_timeout} -le ${trm_maxwait} ]
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then
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trm_timeout=60
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fi
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}
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# gather radio information & bring down all STA interfaces
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#
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f_prep()
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{
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local eap_rc=0 config="${1}"
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local mode="$(uci_get wireless "${config}" mode)"
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local network="$(uci_get wireless "${config}" network)"
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local radio="$(uci_get wireless "${config}" device)"
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local disabled="$(uci_get wireless "${config}" disabled)"
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local eaptype="$(uci_get wireless "${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_set wireless "${config}" disabled 1
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fi
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if [ -n "${eaptype}" ]
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then
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eap_rc="$("${trm_wpa}" -veap >/dev/null 2>&1; printf "%u" ${?})"
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fi
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if [ -z "${eaptype}" ] || [ ${eap_rc} -eq 0 ]
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then
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trm_stalist="${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}, eap_rc: ${eap_rc}, radio: ${radio}, trm_radio: ${trm_radio:-"-"}, disabled: ${disabled}"
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}
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# check interface status
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#
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f_check()
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{
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local ifname radio dev_status config sta_essid sta_bssid result wait=1 mode="${1}" status="${2:-"false"}" IFS=" "
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trm_ifquality=0
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trm_ifstatus="false"
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if [ "${mode}" != "initial" ]
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then
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ubus call network reload
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fi
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while [ ${wait} -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 ${trm_radiolist}
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do
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result="$(printf "%s" "${dev_status}" | jsonfilter -l1 -e "@.${radio}.up")"
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if [ "${result}" = "true" ] && [ -z "$(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_devlist}" = "${trm_radiolist}" ] || [ ${wait} -eq ${trm_maxwait} ]
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then
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ifname="${trm_devlist}"
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break
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else
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trm_devlist=""
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fi
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elif [ "${mode}" = "rev" ]
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then
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wait=$(( ${trm_maxwait} / 3 ))
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sleep ${wait}
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break
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else
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ifname="$(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_ifquality="$(${trm_iwinfo} ${ifname} info 2>/dev/null | awk -F "[\/| ]" '/Link Quality:/{printf "%i\n", (100 / $NF * $(NF-1)) }')"
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if [ ${trm_ifquality} -ge ${trm_minquality} ]
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then
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trm_ifstatus="$(ubus -S call network.interface dump 2>/dev/null | jsonfilter -l1 -e "@.interface[@.device=\"${ifname}\"].up")"
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elif [ "${mode}" = "initial" ] && [ ${trm_ifquality} -lt ${trm_minquality} ]
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then
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trm_ifstatus="${status}"
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sta_essid="$(printf "%s" "${dev_status}" | jsonfilter -l1 -e '@.*.interfaces[@.config.mode="sta"].*.ssid')"
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sta_bssid="$(printf "%s" "${dev_status}" | jsonfilter -l1 -e '@.*.interfaces[@.config.mode="sta"].*.bssid')"
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f_log "info" "uplink '${sta_essid:-"-"}/${sta_bssid:-"-"}' is out of range (${trm_ifquality}/${trm_minquality}), uplink disconnected (${trm_sysver})"
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fi
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fi
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fi
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if [ "${mode}" = "initial" ] || [ "${trm_ifstatus}" = "true" ]
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then
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if ([ "${trm_ifstatus}" != "true" ] && [ "${trm_ifstatus}" != "${status}" ]) || [ ${trm_ifquality} -lt ${trm_minquality} ]
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then
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f_jsnup
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fi
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if [ "${mode}" = "initial" ] && [ "${trm_captive}" -eq 1 ] && [ "${trm_ifstatus}" = "true" ]
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then
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result="$(${trm_fetch} --timeout=$(( ${trm_maxwait} / 3 )) --spider "${trm_captiveurl}" 2>&1 | awk '/^Redirected/{printf "%s" "net cp \047"$NF"\047";exit}/^Download completed/{printf "%s" "net ok";exit}/^Failed|^Connection error/{printf "%s" "net nok";exit}')"
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if [ -n "${result}" ] && ([ -z "${trm_connection}" ] || [ "${result}" != "${trm_connection%/*}" ])
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then
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trm_connection="${result}/${trm_ifquality}"
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f_jsnup
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fi
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fi
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break
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fi
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fi
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wait=$(( wait + 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}, quality: ${trm_ifquality}, connection: ${trm_connection:-"-"}, wait: ${wait}, max_wait: ${trm_maxwait}, min_quality: ${trm_minquality}, captive: ${trm_captive}"
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}
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# update runtime information
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#
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f_jsnup()
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{
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local config sta_iface sta_radio sta_essid sta_bssid dev_status status="${trm_ifstatus}"
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if [ "${status}" = "true" ]
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then
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status="connected (${trm_connection:-"-"})"
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else
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trm_connection=""
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if [ "${status}" = "false" ]
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then
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status="not connected"
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fi
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fi
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dev_status="$(ubus -S call network.wireless status 2>/dev/null)"
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if [ -n "${dev_status}" ]
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then
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config="$(printf "%s" "${dev_status}" | jsonfilter -l1 -e '@.*.interfaces[@.config.mode="sta"].section')"
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if [ -n "${config}" ]
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then
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sta_iface="$(uci_get wireless "${config}" network)"
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sta_radio="$(uci_get wireless "${config}" device)"
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sta_essid="$(uci_get wireless "${config}" ssid)"
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sta_bssid="$(uci_get wireless "${config}" bssid)"
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fi
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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" "${sta_essid:-"-"}/${sta_bssid:-"-"}"
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json_add_string "station_interface" "${sta_iface:-"-"}"
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json_add_string "station_radio" "${sta_radio:-"-"}"
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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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f_log "debug" "f_jsnup::: config: ${config:-"-"}, status: ${status:-"-"}, sta_iface: ${sta_iface:-"-"}, sta_radio: ${sta_radio:-"-"}, sta_essid: ${sta_essid:-"-"}, sta_bssid: ${sta_bssid:-"-"}"
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}
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# write to syslog
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#
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f_log()
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{
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local class="${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 cnt dev config scan scan_list scan_essid scan_bssid scan_quality sta sta_essid sta_bssid sta_radio sta_iface IFS=" "
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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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uci_commit wireless
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f_check "dev" "running"
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f_log "debug" "f_main ::: iwinfo: ${trm_iwinfo}, dev_list: ${trm_devlist}, sta_list: ${trm_stalist:0:800}"
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for dev in ${trm_devlist}
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do
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if [ -z "$(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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cnt=1
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while [ ${trm_maxretry} -eq 0 ] || [ ${cnt} -le ${trm_maxretry} ]
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do
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scan_list="$(${trm_iwinfo} "${dev}" scan 2>/dev/null | awk 'BEGIN{FS="[/ ]"}/Address:/{var1=$NF}/ESSID:/{var2="";for(i=12;i<=NF;i++)if(var2==""){var2=$i}else{var2=var2" "$i}}/Quality:/{printf "%i,%s,%s\n",(100/$NF*$(NF-1)),var1,var2}' | sort -rn | awk '{ORS=",";print $0}')"
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f_log "debug" "f_main ::: dev: ${dev}, scan_list: ${scan_list:0:800}, cnt: ${cnt}, max_cnt: ${trm_maxretry}"
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if [ -n "${scan_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_get wireless "${config}" ssid)"
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sta_bssid="$(uci_get wireless "${config}" bssid)"
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sta_iface="$(uci_get wireless "${config}" network)"
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IFS=","
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for scan in ${scan_list}
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do
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if [ -z "${scan_quality}" ]
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then
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scan_quality="${scan}"
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elif [ -z "${scan_bssid}" ]
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then
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scan_bssid="${scan}"
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elif [ -z "${scan_essid}" ]
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then
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scan_essid="${scan}"
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fi
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if [ -n "${scan_quality}" ] && [ -n "${scan_bssid}" ] && [ -n "${scan_essid}" ]
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then
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if [ ${scan_quality} -ge ${trm_minquality} ]
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then
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if (([ "${scan_essid}" = "\"${sta_essid}\"" ] && ([ -z "${sta_bssid}" ] || [ "${scan_bssid}" = "${sta_bssid}" ])) || \
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([ "${scan_bssid}" = "${sta_bssid}" ] && [ "${scan_essid}" = "unknown" ])) && [ "${dev}" = "${sta_radio}" ]
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then
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f_log "debug" "f_main ::: scan_quality: ${scan_quality}, scan_bssid: ${scan_bssid}, scan_essid: ${scan_essid}"
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uci_set wireless "${config}" disabled 0
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f_check "sta"
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if [ "${trm_ifstatus}" = "true" ]
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then
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uci_commit wireless
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f_log "info" "interface '${sta_iface}' on '${sta_radio}' connected to uplink '${sta_essid:-"-"}/${sta_bssid:-"-"}' (${trm_sysver})"
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return 0
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elif [ ${cnt} -eq ${trm_maxretry} ]
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then
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uci_set wireless "${config}" disabled 1
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if [ -n "${sta_essid}" ]
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then
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uci_set wireless "${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_set wireless "${config}" bssid "${sta_bssid}_err"
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fi
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uci_commit wireless
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f_log "info" "can't connect to uplink '${sta_essid:-"-"}/${sta_bssid:-"-"}', uplink disabled (${trm_sysver})"
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f_check "rev"
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else
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uci -q revert wireless
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f_log "info" "can't connect to uplink '${sta_essid:-"-"}/${sta_bssid:-"-"}' (${trm_sysver})"
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f_check "rev"
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fi
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fi
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fi
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scan_quality=""
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scan_bssid=""
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scan_essid=""
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fi
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done
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IFS=" "
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done
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fi
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cnt=$(( cnt + 1 ))
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sleep $(( ${trm_maxwait} / 6 ))
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done
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done
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if [ ! -s "${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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elif [ ! -s "${trm_rtfile}" ]
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then
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f_jsnup
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fi
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}
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# source required system libraries
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#
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if [ -r "/lib/functions.sh" ] && [ -r "/usr/share/libubox/jshn.sh" ]
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then
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. "/lib/functions.sh"
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. "/usr/share/libubox/jshn.sh"
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else
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f_log "err" "system libraries not found"
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fi
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# control travelmate actions
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#
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while true
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do
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if [ -z "${trm_action}" ]
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then
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> "${trm_pidfile}"
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sleep ${trm_timeout}
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else
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printf '%s' "${$}" > "${trm_pidfile}"
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trm_action=""
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fi
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f_envload
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f_main
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done
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