126 lines
2.3 KiB
Bash
126 lines
2.3 KiB
Bash
#!/bin/sh
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. /lib/functions.sh
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. /lib/functions/network.sh
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CHECK_INTERVAL=$1
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shift
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WATCHDOG_TIMEOUT=$1
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shift
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USE_WATCHDOG=$1
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shift
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SAVE_LOGS=$1
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shift
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INTERFACES="$*"
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ACTIVE=0
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NO_NEIGHBORS_COUNT=0
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MIN_KICK=5
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log() {
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local msg="$1"
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logger -t naywatch "$msg"
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}
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write_logs() {
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save_log() {
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eval $1 > /root/$(date +%s)-"$1".log
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}
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config_load naywatch
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config_list_foreach general save_cmd save_log
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sync
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}
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neighbors_available() {
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local phy
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for interface in $INTERFACES; do
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network_get_physdev phy $interface > /dev/null 2>&1
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linklocal=$(ip -6 a list dev $phy | grep "scope link" | awk '{print $2}' | sed 's/\/64//') 2> /dev/null
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ips=$(ping ff02::1%$phy -w5 -W5 -c2 | awk '/from/{print($4)}' | sed 's/.$//') 2> /dev/null
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for ip in $ips; do
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if [ $ip != $linklocal ] && [ $(owipcalc $ip linklocal) -eq 1 ]; then
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echo 1
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return 0
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fi
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done
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done
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echo 0
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}
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activate_watchdog() {
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# disable openwrt instrumentation:
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ubus call system watchdog '{"magicclose":true,"stop":true,"timeout":'${WATCHDOG_TIMEOUT}'}' > /dev/null
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exec 3>/dev/watchdog
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}
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reboot_now() {
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# copied from watch-cat
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reboot &
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[ "$1" -ge 1 ] && {
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sleep "$1"
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echo 1 >/proc/sys/kernel/sysrq
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echo b >/proc/sysrq-trigger
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}
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}
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no_neighbors() {
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log "No Neighbors Available!"
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NO_NEIGHBORS_COUNT=$(($NO_NEIGHBORS_COUNT+1))
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if [ $ACTIVE -eq 0 ]; then
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return 0
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fi
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if [ $SAVE_LOGS -eq 1 ]; then
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log "Saving Logs!"
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write_logs
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fi
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if [ $USE_WATCHDOG -eq 0 ] && [ $NO_NEIGHBORS_COUNT -gt $MIN_KICK ]; then
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reboot_now 10
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fi
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}
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log "Naywatch Started!"
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neighbors() {
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if [ $ACTIVE -eq 0 ]; then
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log "Naywatch Activated!"
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fi
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ACTIVE=1
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NO_NEIGHBORS_COUNT=0
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if [ $USE_WATCHDOG -eq 1 ]; then
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echo 1 >&3
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fi
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}
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not_active() {
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if [ $USE_WATCHDOG -eq 1 ]; then
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echo 1 >&3
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fi
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}
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if [ $USE_WATCHDOG -eq 1 ]; then
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activate_watchdog
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fi
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while [ 1 ]; do
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# first sleep
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sleep $CHECK_INTERVAL
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has_neighbor=$(neighbors_available)
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if [ $has_neighbor -eq 0 ] && [ $ACTIVE -eq 1 ]; then
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no_neighbors
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elif [ $has_neighbor -eq 1 ]; then
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neighbors
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else
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not_active
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fi
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done
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exit 0
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