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129 lines
3.0 KiB
129 lines
3.0 KiB
#!/bin/sh
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. /lib/functions.sh
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LOG="/usr/bin/logger -t $(basename "$0")[$$] -p"
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INTERFACE=""
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DEVICE=""
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IFDOWN_EVENT=0
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clean_up() {
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$LOG notice "Stopping mwan3track for interface \"${INTERFACE}\""
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rm "/var/run/mwan3track-${INTERFACE}.pid" &> /dev/null
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rm -rf "/var/run/mwan3track/${INTERFACE}" &> /dev/null
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if [ -z "$(ls -A "/var/run/mwan3track")" ]; then
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rm -rf "/var/run/mwan3track"
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fi
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exit 0
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}
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if_down() {
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$LOG info "Detect ifdown event on interface ${INTERFACE} (${DEVICE})"
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IFDOWN_EVENT=1
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}
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main() {
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local reliability count timeout interval failure_interval
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local recovery_interval down up size
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[ -z "$3" ] && echo "Error: should not be started manually" && exit 0
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INTERFACE=$1
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DEVICE=$2
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echo "$$" > /var/run/mwan3track-$1.pid
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mkdir -p /var/run/mwan3track/$1
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trap clean_up SIGINT SIGTERM
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trap if_down SIGUSR1
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config_load mwan3
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config_get reliability $1 reliability 1
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config_get count $1 count 1
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config_get timeout $1 timeout 4
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config_get interval $1 interval 10
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config_get down $1 down 5
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config_get up $1 up 5
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config_get size $1 size 56
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config_get failure_interval $1 failure_interval $interval
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config_get recovery_interval $1 recovery_interval $interval
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local score=$(($down+$up))
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local track_ips=$(echo $* | cut -d ' ' -f 3-99)
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local host_up_count=0
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local lost=0
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local sleep_time=0
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local turn=0
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echo "offline" > /var/run/mwan3track/$1/STATUS
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while true; do
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sleep_time=$interval
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for track_ip in $track_ips; do
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ping -I $2 -c $count -W $timeout -s $size -q $track_ip &> /dev/null
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if [ $? -eq 0 ]; then
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let host_up_count++
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echo "up" > /var/run/mwan3track/$1/TRACK_${track_ip}
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else
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let lost++
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echo "down" > /var/run/mwan3track/$1/TRACK_${track_ip}
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fi
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done
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if [ $host_up_count -lt $reliability ]; then
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let score--
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if [ $score -lt $up ]; then
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score=0
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else
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sleep_time=$failure_interval
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fi
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if [ $score -eq $up ]; then
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echo "offline" > /var/run/mwan3track/$1/STATUS
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$LOG notice "Interface $1 ($2) is offline"
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env -i ACTION=ifdown INTERFACE=$1 DEVICE=$2 /sbin/hotplug-call iface
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score=0
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fi
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else
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if [ $score -lt $(($down+$up)) ] && [ $lost -gt 0 ]; then
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$LOG info "Lost $(($lost*$count)) ping(s) on interface $1 ($2)"
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fi
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let score++
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lost=0
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if [ $score -gt $up ]; then
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echo "online" > /var/run/mwan3track/$1/STATUS
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score=$(($down+$up))
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elif [ $score -le $up ]; then
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sleep_time=$recovery_interval
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fi
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if [ $score -eq $up ]; then
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$LOG notice "Interface $1 ($2) is online"
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env -i ACTION=ifup INTERFACE=$1 DEVICE=$2 /sbin/hotplug-call iface
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rm /var/run/mwan3track-$1.pid
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rm -rf "/var/run/mwan3track/${1}" &> /dev/null
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exit 0
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fi
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fi
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let turn++
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echo "${lost}" > /var/run/mwan3track/$1/LOST
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echo "${score}" > /var/run/mwan3track/$1/SCORE
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echo "${turn}" > /var/run/mwan3track/$1/TURN
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host_up_count=0
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sleep "${sleep_time}" &
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wait
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if [ "${IFDOWN_EVENT}" -eq 1 ]; then
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score=0
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echo "offline" > /var/run/mwan3track/$1/STATUS
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IFDOWN_EVENT=0
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fi
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done
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}
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main "$@"
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