#!/bin/sh

# This script is meant to run continuously, instead of being constantly called by cron. It is best
# called from a screen session or just call it and dump stdout to /dev/null.

# If the gateway of the mesh goes away, we turn off our typical user serving APs and turn on a
# 'help me' AP. Mainly useful for mesh nodes that might have their LTE hotspot (gateway) wander off.

# [ config vars ]
ping_ip=192.168.1.1

# [ global vars ]
# These are the vars for how many pings we can miss before we reset the wwan0 connection
pingtries=0
maxtries=5
failedstate=0

watchdog_name=gateway-watchdog

logger -t $watchdog_name "Starting wan-watchdog of" $modem_iface
echo $watchdog_name

# Instead of waiting until we get pings we're just going to sleep for 10 before going on
sleep 10

# We need to make sure our customer APs are 'on' or something for the startup.
# If the mesh node gets shutdown in it's 'help me' state, it needs to be sure
# to enable the right APs if it was left in that state.
# If we just grab the status of the 'help me' AP, that would let us set our failed state flag.
echo Failed state start
failcheck=$(uci -q get wireless.@wifi-iface[4].disabled)
echo Output from uci:
echo $failcheck
#if [ failcheck -eq 0 ]
if [[ "$failcheck" == *"0"* ]]
then
    echo "Caught failed if check"
    failedstate=1
fi
echo Setting failstate to:
echo $failedstate
echo end failstate shit

logger -t $watchdog_name "Starting connection monitoring loop..."

while [[ 1 ]]
do
    pingtries=0
    while [[ $pingtries -lt $maxtries ]]
    do
        echo "Pinging..."
        if /bin/ping -c 1 $ping_ip >/dev/null
        then
            echo "Ping success, sleeping"
            if [ $failedstate -eq 1 ]
            then
                logger -t $watchdog_name "Enabling user APs, disable help me APs"
        echo  "Enabling user APs, disable help me APs"
        failedstate=0
                uci -q set wireless.@wifi-iface[4].disabled=1
                uci -q set wireless.radio0.disabled=0
                uci -q set wireless.radio1.disabled=0
                uci -q set wireless.@wifi-iface[0].disabled=0
                uci -q set wireless.@wifi-iface[1].disabled=0
                uci commit wireless
                wifi down && wifi up
                sleep 15
            fi
            break
        fi
        pingtries=$((pingtries+1))
        echo "Ping failure"
    logger -t $watchdog_name "Ping failure"
    sleep 2
    done

    if [ $pingtries -eq $maxtries ]
    then
    if [ $failedstate -eq 0 ]
    then
            logger -t $watchdog_name "Disabling user APs, enabling help me APs"
        echo "Disabling user APs, enabling help me APs"
        failedstate=1
            uci -q set wireless.@wifi-iface[4].disabled=0
            uci -q set wireless.@wifi-iface[0].disabled=1
            uci -q set wireless.@wifi-iface[1].disabled=1
            uci commit wireless
            wifi down && wifi up
            sleep 15
    fi
    else
       sleep 5
    fi

done