You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 

263 lines
8.3 KiB

#!/bin/sh
# travelmate, a wlan connection manager for travel router
# written by Dirk Brenken (dev@brenken.org)
# This is free software, licensed under the GNU General Public License v3.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# prepare environment
#
LC_ALL=C
PATH="/usr/sbin:/usr/bin:/sbin:/bin"
trm_pid="${$}"
trm_ver="0.2.6"
trm_debug=0
trm_loop=30
trm_maxretry=3
trm_iw=1
trm_device=""
# function to prepare all relevant AP and STA interfaces
#
trm_prepare()
{
local config="${1}"
local mode="$(uci -q get wireless."${config}".mode)"
local device="$(uci -q get wireless."${config}".device)"
local network="$(uci -q get wireless."${config}".network)"
local ifname="$(uci -q get wireless."${config}".ifname)"
local disabled="$(uci -q get wireless."${config}".disabled)"
if [ "${mode}" = "ap" ] && [ -n "${network}" ] && [ -n "${ifname}" ] &&
([ -z "${trm_device}" ] || [ "${trm_device}" = "${device}" ])
then
trm_aplist="${trm_aplist} ${ifname}"
if [ -z "${disabled}" ] || [ "${disabled}" = "1" ]
then
trm_set "none" "${config}" "${network}" "up"
fi
elif [ "${mode}" = "sta" ] && [ -n "${network}" ]
then
trm_stalist="${trm_stalist} ${config}_${network}"
if [ -z "${disabled}" ] || [ "${disabled}" = "0" ]
then
trm_set "none" "${config}" "${network}" "down"
fi
fi
}
# function to set different wlan interface status
#
trm_set()
{
local change="${1}"
local config="${2}"
local interface="${3}"
local command="${4}"
if [ "${command}" = "up" ]
then
uci -q set wireless."${config}".disabled=0
ubus call network.interface."${interface}" "${command}"
trm_checklist="${trm_checklist} ${interface}"
elif [ "${command}" = "down" ]
then
uci -q set wireless."${config}".disabled=1
ubus call network.interface."${interface}" "${command}"
fi
trm_log "debug" "set ::: change: ${change}, config: ${config}, interface: ${interface}, command: ${command}, checklist: ${trm_checklist}, uci-changes: $(uci -q changes wireless)"
if [ -n "$(uci -q changes wireless)" ]
then
if [ "${change}" = "commit" ]
then
uci -q commit wireless
ubus call network reload
trm_check
elif [ "${change}" = "partial" ]
then
ubus call network reload
trm_check
elif [ "${change}" = "defer" ]
then
uci -q revert wireless
elif [ "${change}" = "revert" ]
then
uci -q revert wireless
ubus call network reload
trm_check
fi
fi
}
# function to check interface status on "up" event
#
trm_check()
{
local interface value
local cnt=0
for interface in ${trm_checklist}
do
while [ $((cnt)) -lt 15 ]
do
json_load "$(ubus -S call network.interface."${interface}" status)"
json_get_var trm_status up
if [ "${trm_status}" = "1" ] || [ -n "${trm_uplink}" ]
then
trm_log "debug" "check::: interface: ${interface}, status: ${trm_status}, uplink-cfg: ${trm_uplink}, uplink-ssid: ${trm_ssid}, loop-cnt: ${cnt}, error-cnt: $((trm_count_${trm_config}))"
json_cleanup
break
fi
cnt=$((cnt+1))
sleep 1
done
done
if [ -n "${trm_uplink}" ] && [ "${trm_status}" = "0" ]
then
ubus call network reload
eval "trm_count_${trm_uplink}=\$((trm_count_${trm_uplink}+1))"
trm_checklist=""
trm_uplink=""
trm_log "info" "uplink ${trm_ssid} get lost"
elif [ -z "${trm_uplink}" ] && [ -n "${trm_checklist}" ]
then
trm_checklist=""
fi
}
# function to write to syslog
#
trm_log()
{
local class="${1}"
local log_msg="${2}"
if [ -n "${log_msg}" ] && ([ "${class}" != "debug" ] || ([ "${class}" = "debug" ] && [ $((trm_debug)) -eq 1 ]))
then
logger -t "travelmate-${trm_ver}[${trm_pid}] ${class}" "${log_msg}" 2>&1
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"
json_init
else
trm_log "error" "required system libraries not found"
exit 255
fi
# load uci config and check 'enabled' option
#
option_cb()
{
local option="${1}"
local value="${2}"
eval "${option}=\"${value}\""
}
config_load travelmate
if [ "${trm_enabled}" != "1" ]
then
trm_log "info" "travelmate is currently disabled, please set 'trm_enabled' to '1' to use this service"
exit 0
fi
# check for preferred wireless tool
#
if [ $((trm_iw)) -eq 1 ]
then
trm_scanner="$(which iw)"
else
trm_scanner="$(which iwinfo)"
fi
if [ -z "${trm_scanner}" ]
then
trm_log "error" "no wireless tool for wlan scanning found, please install 'iw' or 'iwinfo'"
exit 1
fi
# infinitive loop to establish and track STA uplink connections
#
while true
do
if [ -z "${trm_uplink}" ] || [ "${trm_status}" = "0" ]
then
trm_aplist=""
trm_stalist=""
config_load wireless
config_foreach trm_prepare wifi-iface
trm_set "commit"
if [ -z "${trm_aplist}" ]
then
trm_log "error" "no usable AP configuration found, please add an 'ifname' entry in '/etc/config/wireless'"
exit 1
fi
for ap in ${trm_aplist}
do
ubus -t 10 wait_for hostapd."${ap}"
if [ $((trm_iw)) -eq 1 ]
then
trm_ssidlist="$(${trm_scanner} dev "${ap}" scan 2>/dev/null | awk '/SSID: /{if(!seen[$0]++){printf "\"";for(i=2; i<=NF; i++)if(i==2)printf $i;else printf " "$i;printf "\" "}}')"
else
trm_ssidlist="$(${trm_scanner} "${ap}" scan | awk '/ESSID: ".*"/{ORS=" ";if (!seen[$0]++) for(i=2; i<=NF; i++) print $i}')"
fi
trm_log "debug" "main ::: scan-tool: ${trm_scanner}, aplist: ${trm_aplist}, ssidlist: ${trm_ssidlist}"
if [ -n "${trm_ssidlist}" ]
then
if [ -z "${trm_stalist}" ]
then
trm_log "error" "no usable STA configuration found, please add a 'network' entry in '/etc/config/wireless'"
exit 1
fi
for sta in ${trm_stalist}
do
trm_config="${sta%%_*}"
trm_network="${sta##*_}"
trm_ifname="$(uci -q get wireless."${trm_config}".ifname)"
trm_ssid="\"$(uci -q get wireless."${trm_config}".ssid)\""
if [ -z "${trm_ifname}" ]
then
trm_ifname="${trm_network}"
fi
if [ $((trm_count_${trm_config})) -lt $((trm_maxretry)) ] || [ $((trm_maxretry)) -eq 0 ]
then
if [ -n "$(printf "${trm_ssidlist}" | grep -Fo "${trm_ssid}")" ]
then
trm_set "partial" "${trm_config}" "${trm_network}" "up"
if [ "${trm_status}" = "1" ]
then
trm_checklist="${trm_network}"
trm_uplink="${trm_config}"
trm_set "defer"
trm_log "info" "wwan interface \"${trm_ifname}\" connected to uplink ${trm_ssid}"
break 2
else
trm_set "revert"
eval "trm_count_${trm_config}=\$((trm_count_${trm_config}+1))"
fi
fi
elif [ $((trm_count_${trm_config})) -eq $((trm_maxretry)) ] && [ $((trm_maxretry)) -ne 0 ]
then
eval "trm_count_${trm_config}=\$((trm_count_${trm_config}+1))"
trm_log "info" "uplink ${trm_ssid} disabled due to permanent connection failures"
fi
done
fi
sleep 5
done
else
trm_check
if [ -n "${trm_uplink}" ]
then
sleep ${trm_loop}
fi
fi
done