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225 lines
5.6 KiB
225 lines
5.6 KiB
#!/bin/sh
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#
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# Copyright (C) 2010 segal.di.ubi.pt
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# Copyright (C) 2020 nbembedded.com
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#
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# This is free software, licensed under the GNU General Public License v2.
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#
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get_ping_size() {
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ps=$1
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case "$ps" in
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small)
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ps="1"
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;;
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windows)
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ps="32"
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;;
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standard)
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ps="56"
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;;
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big)
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ps="248"
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;;
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huge)
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ps="1492"
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;;
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jumbo)
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ps="9000"
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;;
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*)
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echo "Error: invalid ping_size. ping_size should be either: small, windows, standard, big, huge or jumbo"
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echo "Cooresponding ping packet sizes (bytes): small=1, windows=32, standard=56, big=248, huge=1492, jumbo=9000"
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;;
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esac
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echo $ps
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}
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reboot_now() {
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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 # Will immediately reboot the system without syncing or unmounting your disks.
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}
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}
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watchcat_periodic() {
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failure_period="$1"
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force_reboot_delay="$2"
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sleep "$failure_period" && reboot_now "$force_reboot_delay"
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}
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watchcat_restart_modemmanager_iface() {
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[ "$2" -gt 0 ] && {
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logger -t INFO "Resetting current-bands to 'any' on modem: \"$1\" now."
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/usr/bin/mmcli -m any --set-current-bands=any
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}
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logger -t INFO "Reconnecting modem: \"$1\" now."
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/etc/init.d/modemmanager restart
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ifup "$1"
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}
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watchcat_restart_network_iface() {
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logger -t INFO "Restarting network interface: \"$1\"."
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ip link set "$1" down
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ip link set "$1" up
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}
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watchcat_restart_all_network() {
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logger -t INFO "Restarting networking now by running: /etc/init.d/network restart"
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/etc/init.d/network restart
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}
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watchcat_monitor_network() {
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failure_period="$1"
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ping_hosts="$2"
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ping_frequency_interval="$3"
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ping_size="$4"
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iface="$5"
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mm_iface_name="$6"
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mm_iface_unlock_bands="$7"
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time_now="$(cat /proc/uptime)"
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time_now="${time_now%%.*}"
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[ "$time_now" -lt "$failure_period" ] && sleep "$((failure_period - time_now))"
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time_now="$(cat /proc/uptime)"
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time_now="${time_now%%.*}"
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time_lastcheck="$time_now"
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time_lastcheck_withinternet="$time_now"
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ping_size="$(get_ping_size "$ping_size")"
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while true; do
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# account for the time ping took to return. With a ping time of 5s, ping might take more than that, so it is important to avoid even more delay.
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time_now="$(cat /proc/uptime)"
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time_now="${time_now%%.*}"
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time_diff="$((time_now - time_lastcheck))"
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[ "$time_diff" -lt "$ping_frequency_interval" ] && sleep "$((ping_frequency_interval - time_diff))"
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time_now="$(cat /proc/uptime)"
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time_now="${time_now%%.*}"
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time_lastcheck="$time_now"
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for host in $ping_hosts; do
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if [ "$iface" != "" ]; then
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ping_result="$(
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ping -I "$iface" -s "$ping_size" -c 1 "$host" &> /dev/null
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echo $?
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)"
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else
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ping_result="$(
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ping -s "$ping_size" -c 1 "$host" &> /dev/null
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echo $?
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)"
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fi
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if [ "$ping_result" -eq 0 ]; then
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time_lastcheck_withinternet="$time_now"
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else
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if [ "$iface" != "" ]; then
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logger -p daemon.info -t "watchcat[$$]" "Could not reach $host via \"$iface\" for \"$((time_now - time_lastcheck_withinternet))\" seconds. Restarting \"$iface\" after reaching \"$failure_period\" seconds"
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else
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logger -p daemon.info -t "watchcat[$$]" "Could not reach $host for \"$((time_now - time_lastcheck_withinternet))\" seconds. Restarting networking after reaching \"$failure_period\" seconds"
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fi
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fi
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done
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[ "$((time_now - time_lastcheck_withinternet))" -ge "$failure_period" ] && {
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if [ "$mm_iface_name" != "" ]; then
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watchcat_restart_modemmanager_iface "$mm_iface_name" "$mm_iface_unlock_bands"
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fi
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if [ "$iface" != "" ]; then
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watchcat_restart_network_iface "$iface"
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else
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watchcat_restart_all_network
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fi
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/etc/init.d/watchcat start
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# Restart timer cycle.
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time_lastcheck_withinternet="$time_now"
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}
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done
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}
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watchcat_ping() {
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failure_period="$1"
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force_reboot_delay="$2"
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ping_hosts="$3"
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ping_frequency_interval="$4"
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ping_size="$5"
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time_now="$(cat /proc/uptime)"
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time_now="${time_now%%.*}"
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[ "$time_now" -lt "$failure_period" ] && sleep "$((failure_period - time_now))"
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time_now="$(cat /proc/uptime)"
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time_now="${time_now%%.*}"
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time_lastcheck="$time_now"
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time_lastcheck_withinternet="$time_now"
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ping_size="$(get_ping_size "$ping_size")"
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while true; do
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# account for the time ping took to return. With a ping time of 5s, ping might take more than that, so it is important to avoid even more delay.
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time_now="$(cat /proc/uptime)"
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time_now="${time_now%%.*}"
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time_diff="$((time_now - time_lastcheck))"
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[ "$time_diff" -lt "$ping_frequency_interval" ] && sleep "$((ping_frequency_interval - time_diff))"
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time_now="$(cat /proc/uptime)"
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time_now="${time_now%%.*}"
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time_lastcheck="$time_now"
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for host in $ping_hosts; do
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if [ "$iface" != "" ]; then
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ping_result="$(
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ping -I "$iface" -s "$ping_size" -c 1 "$host" &> /dev/null
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echo $?
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)"
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else
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ping_result="$(
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ping -s "$ping_size" -c 1 "$host" &> /dev/null
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echo $?
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)"
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fi
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if [ "$ping_result" -eq 0 ]; then
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time_lastcheck_withinternet="$time_now"
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else
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logger -p daemon.info -t "watchcat[$$]" "Could not reach $host for $((time_now - time_lastcheck_withinternet)). Rebooting after reaching $failure_period"
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fi
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done
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[ "$((time_now - time_lastcheck_withinternet))" -ge "$failure_period" ] && reboot_now "$force_reboot_delay"
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done
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}
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mode="$1"
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# Fix potential typo in mode and provide backward compatibility.
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[ "$mode" = "allways" ] && mode="periodic_reboot"
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[ "$mode" = "always" ] && mode="periodic_reboot"
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[ "$mode" = "ping" ] && mode="ping_reboot"
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case "$mode" in
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periodic_reboot)
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watchcat_periodic "$2" "$3"
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;;
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ping_reboot)
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watchcat_ping "$2" "$3" "$4" "$5" "$6"
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;;
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restart_iface)
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watchcat_monitor_network "$2" "$3" "$4" "$5" "$6" "$7"
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;;
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*)
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echo "Error: invalid mode selected: $mode"
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;;
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esac
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