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469 lines
15 KiB
469 lines
15 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="1.3.2"
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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_captive=1
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trm_proactive=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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# trim leading and trailing whitespace characters
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#
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f_trim()
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{
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local trim="$1"
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trim="${trim#"${trim%%[![:space:]]*}"}"
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trim="${trim%"${trim##*[![:space:]]}"}"
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printf '%s' "${trim}"
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}
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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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trm_sysver="${sys_model}, ${sys_desc}"
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fi
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# (re-)initialize global list variables
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#
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unset trm_devlist trm_stalist trm_radiolist trm_active_sta
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# load config and check 'enabled' option
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#
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option_cb()
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{
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local option="${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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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}" proactive="${2}"
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local mode="$(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}" ] && [ -z "$(printf "%s" "${trm_radiolist}" | grep -Fo " ${radio}")" ]
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then
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trm_radiolist="$(f_trim "${trm_radiolist} ${radio}")"
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elif [ -n "${trm_radio}" ] && [ -z "${trm_radiolist}" ]
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then
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trm_radiolist="$(f_trim "$(printf "%s" "${trm_radio}" | \
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awk '{while(match(tolower($0),/radio[0-9]/)){ORS=" ";print substr(tolower($0),RSTART,RLENGTH);$0=substr($0,RSTART+RLENGTH)}}')")"
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fi
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if [ "${mode}" = "sta" ] && [ "${network}" = "${trm_iface}" ]
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then
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if ([ -z "${disabled}" ] || [ "${disabled}" = "0" ]) && ([ ${proactive} -eq 0 ] || [ "${trm_ifstatus}" != "true" ])
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then
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uci_set wireless "${config}" disabled 1
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elif [ "${disabled}" = "0" ] && [ "${trm_ifstatus}" = "true" ] && [ -z "${trm_active_sta}" ] && [ ${proactive} -eq 1 ]
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then
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trm_active_sta="${config}"
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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}" ] || [ ${eap_rc} -eq 0 ]
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then
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trm_stalist="$(f_trim "${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:-"-"}, trm_active_sta: ${trm_active_sta:-"-"}, proactive: ${proactive}, disabled: ${disabled}"
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}
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# check interface status
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#
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f_check()
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{
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local IFS ifname radio dev_status config sta_essid sta_bssid result wait=1 mode="${1}" status="${2:-"false"}"
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trm_ifquality=0
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if [ "${mode}" = "initial" ]
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then
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trm_ifstatus="false"
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else
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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 " ${radio}")" ]
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then
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trm_devlist="$(f_trim "${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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unset 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}" ]) || \
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([ "${trm_ifstatus}" = "true" ] && [ "${mode}" = "sta" ] && [ -n "${trm_active_sta}" ]) || \
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[ ${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=$(( ${trm_maxwait} / 3 )) "${trm_captiveurl}" -O /dev/null 2>&1 | \
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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}, result: ${result:-"-"}, 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}" faulty_list faulty_station="${1}"
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if [ "${status}" = "true" ]
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then
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status="connected (${trm_connection:-"-"})"
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else
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unset trm_connection
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status="running / not connected"
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fi
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dev_status="$(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_get_var faulty_list "faulty_stations"
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if [ -n "${faulty_station}" ]
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then
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if [ -z "$(printf "%s" "${faulty_list}" | grep -Fo "${faulty_station}")" ]
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then
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faulty_list="$(f_trim "${faulty_list} ${faulty_station}")"
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fi
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fi
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json_add_string "travelmate_status" "${status}"
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json_add_string "travelmate_version" "${trm_ver}"
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json_add_string "station_id" "${sta_radio:-"-"}/${sta_essid:-"-"}/${sta_bssid:-"-"}"
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json_add_string "station_interface" "${sta_iface:-"-"}"
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json_add_string "faulty_stations" "${faulty_list}"
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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_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:-"-"}, faulty_list: ${faulty_list:-"-"}"
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}
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# write to syslog
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#
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f_log()
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{
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local class="${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 IFS cnt dev config scan scan_list scan_essid scan_bssid scan_quality faulty_list
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local sta sta_essid sta_bssid sta_radio sta_iface active_essid active_bssid active_radio active_prio
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f_check "initial"
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if [ "${trm_ifstatus}" != "true" ] || [ ${trm_proactive} -eq 1 ]
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then
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config_load wireless
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config_foreach f_prep wifi-iface ${trm_proactive}
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if [ "${trm_ifstatus}" = "true" ] && [ ${trm_proactive} -eq 1 ]
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then
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json_get_var station_id "station_id"
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active_radio="${station_id%%/*}"
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active_essid="${station_id%/*}"
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active_essid="${active_essid#*/}"
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active_bssid="${station_id##*/}"
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f_check "dev" "true"
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else
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uci_commit wireless
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f_check "dev"
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fi
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json_get_var faulty_list "faulty_stations"
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f_log "debug" "f_main ::: iwinfo: ${trm_iwinfo:-"-"}, dev_list: ${trm_devlist:-"-"}, sta_list: ${trm_stalist:0:800}, faulty_list: ${faulty_list:-"-"}"
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for dev in ${trm_devlist}
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do
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f_log "debug" "f_main ::: dev: ${dev}"
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if [ -z "$(printf "%s" "${trm_stalist}" | grep -o "\-${dev}")" ]
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then
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f_log "debug" "f_main ::: no station on '${dev}' - continue"
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continue
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fi
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cnt=1
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while [ ${cnt} -le ${trm_maxretry} ]
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do
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f_log "debug" "f_main ::: cnt: ${cnt}, max_cnt: ${trm_maxretry}"
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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 "${config}" network)"
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json_get_var faulty_list "faulty_stations"
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if [ -n "$(printf "%s" "${faulty_list}" | grep -Fo "${sta_radio}/${sta_essid}/${sta_bssid}")" ]
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then
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f_log "debug" "f_main ::: faulty station '${sta_radio}/${sta_essid}/${sta_bssid:-"-"}' - continue"
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continue
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fi
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if ([ "${dev}" = "${active_radio}" ] && [ "${sta_essid}" = "${active_essid}" ] && [ "${sta_bssid:-"-"}" = "${active_bssid}" ]) || \
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([ "${dev}" != "${active_radio}" ] && [ "${active_prio}" = "true" ])
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then
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active_prio="true"
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f_log "debug" "f_main ::: active station prioritized '${active_radio}/${active_essid}/${active_bssid:-"-"}' - break"
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break
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fi
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if [ -z "${scan_list}" ]
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then
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scan_list="$(f_trim "$(${trm_iwinfo} "${dev}" scan 2>/dev/null | \
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awk 'BEGIN{FS="[/ ]"}/Address:/{var1=$NF}/ESSID:/{var2="";for(i=12;i<=NF;i++) \
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if(var2==""){var2=$i}else{var2=var2" "$i}}/Quality:/{printf "%i,%s,%s\n",(100/$NF*$(NF-1)),var1,var2}' | \
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sort -rn | awk '{ORS=",";print $0}')")"
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f_log "debug" "f_main ::: scan_list: ${scan_list:0:800}"
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fi
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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}, sta_bssid: ${sta_bssid}, scan_bssid: ${scan_bssid}, sta_essid: \"${sta_essid}\", scan_essid: ${scan_essid}"
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if [ "${dev}" = "${active_radio}" ] && [ -n "${trm_active_sta}" ]
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then
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uci_set wireless "${trm_active_sta}" disabled 1
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unset trm_connection
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fi
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uci_set wireless "${config}" disabled 0
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f_check "sta"
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if [ "${trm_ifstatus}" = "true" ]
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then
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uci_commit wireless
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f_check "initial"
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f_log "info" "connected to uplink '${sta_radio}/${sta_essid}/${sta_bssid:-"-"}' (${trm_sysver})"
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return 0
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elif [ ${cnt} -eq ${trm_maxretry} ]
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then
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uci -q revert wireless
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f_check "rev"
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if [ "${dev}" = "${active_radio}" ] && [ -n "${trm_active_sta}" ]
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then
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f_check "initial"
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fi
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faulty_station="${sta_radio}/${sta_essid}/${sta_bssid:-"-"}"
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f_jsnup "${faulty_station}"
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f_log "info" "uplink disabled '${sta_radio}/${sta_essid}/${sta_bssid:-"-"}' (${trm_sysver})"
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break
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else
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uci -q revert wireless
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f_check "rev"
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f_jsnup
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f_log "info" "can't connect to uplink '${sta_radio}/${sta_essid}/${sta_bssid:-"-"}' (${trm_sysver})"
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unset scan_list
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break
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fi
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fi
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fi
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unset scan_quality scan_bssid scan_essid
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fi
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done
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unset IFS scan_quality scan_bssid scan_essid
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done
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|
cnt=$(( cnt + 1 ))
|
|
sleep $(( ${trm_maxwait} / 6 ))
|
|
done
|
|
unset scan_list
|
|
done
|
|
fi
|
|
}
|
|
|
|
# source required system libraries
|
|
#
|
|
if [ -r "/lib/functions.sh" ] && [ -r "/usr/share/libubox/jshn.sh" ]
|
|
then
|
|
. "/lib/functions.sh"
|
|
. "/usr/share/libubox/jshn.sh"
|
|
else
|
|
f_log "err" "system libraries not found"
|
|
fi
|
|
|
|
# initialize json runtime file
|
|
#
|
|
json_load_file "${trm_rtfile}" >/dev/null 2>&1
|
|
json_select data >/dev/null 2>&1
|
|
if [ ${?} -ne 0 ]
|
|
then
|
|
> "${trm_rtfile}"
|
|
json_init
|
|
json_add_object "data"
|
|
fi
|
|
|
|
# control travelmate actions
|
|
#
|
|
while true
|
|
do
|
|
if [ -z "${trm_action}" ]
|
|
then
|
|
sleep ${trm_timeout}
|
|
elif [ "${trm_action}" = "stop" ]
|
|
then
|
|
> "${trm_rtfile}"
|
|
f_log "info" "travelmate instance stopped ::: action: ${trm_action}, pid: $(cat ${trm_pidfile} 2>/dev/null)"
|
|
exit 0
|
|
else
|
|
f_log "info" "travelmate instance started ::: action: ${trm_action}, pid: ${$}"
|
|
unset trm_action
|
|
fi
|
|
f_envload
|
|
f_main
|
|
done
|