release/src-rt-6.x.4708/router/others/watchdog

   1 #!/bin/sh
   2
   3 #
   4 # Copyright (C) 2015 shibby
   5 #
   6
   7 PREFIX=$1
   8 IFACE=`nvram get "$PREFIX"_ifname`
   9 PROTO=`nvram get "$PREFIX"_proto`
  10 ADDR=`ifconfig "$IFACE" | grep inet | cut -d ":" -f2 | cut -d " " -f1`
  11 LOCK="/tmp/watchdog.$PREFIX"
  12
  13 watchdogRun() {
  14     DST=`nvram get mwan_ckdst`
  15     HOSTLIST=`echo $DST |  sed 's/,/ /'`
  16
  17     RXBYTES1=`cat /sys/class/net/$IFACE/statistics/rx_bytes`
  18     for HOST in $HOSTLIST; do
  19         # we need only send/receive few packages to be sure is connection works.
  20         # Probe = 1, Max hops = 3
  21         traceroute -i $IFACE -w 1 -m 3 $HOST > /dev/null 2>&1
  22     done
  23     RXBYTES2=`cat /sys/class/net/$IFACE/statistics/rx_bytes`
  24     if [ "$RXBYTES2" == "$RXBYTES1" ]; then
  25         logger WAN Watchdog - Connection $PREFIX down - Reconnecting ...
  26         echo "0" > /tmp/"$PREFIX"_state
  27
  28         if [ "$PROTO" == "lte" ]; then
  29             switch4g $PREFIX
  30         else
  31             if [ "$PREFIX" == "wan" ]; then
  32                 service wan1 restart
  33             else
  34                 service $PREFIX restart
  35             fi
  36         fi
  37
  38     else
  39         echo "1" > /tmp/"$PREFIX"_state
  40     fi
  41 }
  42
  43 watchdogAdd() {
  44     CKTIME=`nvram get mwan_cktime`
  45     MINS=`expr "$CKTIME" / 60`
  46
  47     if [ "$MINS" -gt 0 ]; then
  48         ISSET=`cru l | grep watchdog_"$PREFIX" | wc -l`
  49
  50         if [ "$ISSET" == "0" ]; then
  51             cru a watchdog_$PREFIX "*/$MINS * * * * /usr/sbin/watchdog $PREFIX"
  52         fi
  53     fi
  54     echo "0" > /tmp/"$PREFIX"_state
  55 }
  56
  57 watchdogDel() {
  58     ISSET=`cru l | grep watchdog_"$PREFIX" | wc -l`
  59
  60     if [ "$ISSET" == "1" ]; then
  61         cru d watchdog_"$PREFIX"
  62     fi
  63 }
  64
  65 checkLock() {
  66     if [ -f $LOCK ]; then #lock exist
  67         logger WAN Watchdog - another proces in action for $PREFIX
  68         exit 0
  69     fi
  70
  71     touch $LOCK
  72 }
  73
  74 checkLock2() {
  75     if [ -f /etc/switch3g.lock -o -f /etc/switch4g.lock ]; then
  76         logger WAN Watchdog - switch3g or switch4g script in action for $PREFIX - skip
  77         rm $LOCK
  78         exit 0
  79     fi
  80 }
  81
  82 ###################################################
  83
  84 checkLock
  85
  86 checkLock2
  87
  88 if [ -n "$1" ]; then
  89     if [ "$2" == "add" ]; then
  90         watchdogAdd
  91     elif [ "$2" == "del" ]; then
  92         watchdogDel
  93     else
  94         watchdogRun
  95     fi
  96 fi
  97
  98 rm $LOCK