net/mwan3/files/usr/sbin/mwan3track

   1 #!/bin/sh
   2
   3 [ -z "$12" ] && echo "Error: should not be started manually" && exit 0
   4
   5 if [ -e /var/run/mwan3track-$1.pid ] ; then
   6         kill $(cat /var/run/mwan3track-$1.pid) &> /dev/null
   7         rm /var/run/mwan3track-$1.pid &> /dev/null
   8 fi
   9
  10 echo "$$" > /var/run/mwan3track-$1.pid
  11
  12 score=$(($7+$8))
  13 track_ips=$(echo $* | cut -d ' ' -f 12-99)
  14 host_up_count=0
  15 lost=0
  16 sleep_time=0
  17
  18 while true; do
  19
  20         sleep_time=$6
  21
  22         for track_ip in $track_ips; do
  23                 ping -I $2 -c $4 -W $5 -s $9 -q $track_ip &> /dev/null
  24                 if [ $? -eq 0 ]; then
  25                         let host_up_count++
  26                 else
  27                         let lost++
  28                 fi
  29         done
  30
  31         if [ $host_up_count -lt $3 ]; then
  32                 let score--
  33
  34                 if [ $score -lt $8 ]; then
  35                         score=0
  36                 else
  37                         sleep_time=$10
  38                 fi
  39
  40                 if [ $score -eq $8 ]; then
  41
  42                         logger -t mwan3track -p notice "Interface $1 ($2) is offline"
  43                         env -i ACTION=ifdown INTERFACE=$1 DEVICE=$2 /sbin/hotplug-call iface
  44                         score=0
  45
  46                 fi
  47
  48         else
  49
  50                 if [ $score -lt $(($7+$8)) ] && [ $lost -gt 0 ]; then
  51
  52                         logger -t mwan3track -p info "Lost $(($lost*$4)) ping(s) on interface $1 ($2)"
  53
  54                 fi
  55
  56                 let score++
  57                 lost=0
  58
  59                 if [ $score -gt $8 ]; then
  60                         score=$(($7+$8))
  61                 elif [ $score -le $8 ]; then
  62                         sleep_time=$11
  63                 fi
  64
  65                 if [ $score -eq $8 ]; then
  66
  67                         logger -t mwan3track -p notice "Interface $1 ($2) is online"
  68                         env -i ACTION=ifup INTERFACE=$1 DEVICE=$2 /sbin/hotplug-call iface
  69                         rm /var/run/mwan3track-$1.pid
  70                         exit 0
  71                 fi
  72         fi
  73
  74         host_up_count=0
  75         sleep $sleep_time
  76 done
  77
  78 exit 1