155 lines
5.9 KiB
Bash
Executable File
155 lines
5.9 KiB
Bash
Executable File
#!/bin/sh
|
|
|
|
# Copyright(C) 2018, Rafal Kupiec <belliash@codingworkshop.eu.org>
|
|
|
|
source /lib/functions/network.sh
|
|
|
|
DAEMONIZE=0
|
|
LOGGER_ALERT=1
|
|
LOGGER_CRITICAL=2
|
|
LOGGER_ERROR=3
|
|
LOGGER_WARNING=4
|
|
LOGGER_NOTICE=5
|
|
LOGGER_INFO=6
|
|
LOGGER_DEBUG=7
|
|
|
|
CHECK_HOST=$(/sbin/uci -q get wanmonitor.@wanmonitor[0].check_host)
|
|
INTERVAL=$(/sbin/uci -q get wanmonitor.@wanmonitor[0].interval)
|
|
SLEEP=$(/sbin/uci -q get wanmonitor.@wanmonitor[0].sleep)
|
|
WAN_PRIMARY=$(/sbin/uci -q get wanmonitor.@wanmonitor[0].wan_primary)
|
|
WAN_PRIMARY_METRIC=$(/sbin/uci -q get network.${WAN_PRIMARY}.metric)
|
|
WAN_SECONDARY=$(/sbin/uci -q get wanmonitor.@wanmonitor[0].wan_secondary)
|
|
WAN_SECONDARY_METRIC=$(/sbin/uci -q get network.${WAN_SECONDARY}.metric)
|
|
|
|
function initialize() {
|
|
network_get_device IFNAME_WAN_PRIMARY ${WAN_PRIMARY}
|
|
network_get_gateway GATEWAY_WAN_PRIMARY ${WAN_PRIMARY}
|
|
network_get_device IFNAME_WAN_SECONDARY ${WAN_SECONDARY}
|
|
network_get_gateway GATEWAY_WAN_SECONDARY ${WAN_SECONDARY}
|
|
|
|
if [ "x${IFNAME_WAN_PRIMARY}" = "x" ]; then
|
|
IFNAME_WAN_PRIMARY=$(/sbin/uci -q -P /var/state get network.${WAN_PRIMARY}.ifname)
|
|
fi
|
|
|
|
if [ "x${GATEWAY_WAN_PRIMARY}" = "x" ]; then
|
|
GATEWAY_WAN_PRIMARY=$(uci -q -P /var/state get network.${WAN_PRIMARY}.gateway)
|
|
fi
|
|
if [ "x${GATEWAY_WAN_PRIMARY}" = "x" ]; then
|
|
GATEWAY_WAN_PRIMARY=$(ifstatus ${WAN_PRIMARY} | grep -A 2 "\"target\": \"0.0.0.0\"," | awk '/nexthop/ {gsub(/[",]/, "");print $2}')
|
|
fi
|
|
|
|
if [ "x${IFNAME_WAN_SECONDARY}" = "x" ]; then
|
|
IFNAME_WAN_SECONDARY=$(/sbin/uci -q -P /var/state get network.${WAN_SECONDARY}.ifname)
|
|
fi
|
|
|
|
if [ "x${GATEWAY_WAN_SECONDARY}" = "x" ]; then
|
|
GATEWAY_WAN_SECONDARY=$(uci -q -P /var/state get network.${WAN_SECONDARY}.gateway)
|
|
fi
|
|
if [ "x${GATEWAY_WAN_SECONDARY}" = "x" ]; then
|
|
GATEWAY_WAN_SECONDARY=$(ifstatus ${WAN_SECONDARY} | grep -A 2 "\"target\": \"0.0.0.0\"," | awk '/nexthop/ {gsub(/[",]/, "");print $2}')
|
|
fi
|
|
}
|
|
|
|
function prepare() {
|
|
/usr/bin/logger -t $0 -p ${LOGGER_NOTICE} "Starting WAN Monitor ..."
|
|
sleep ${SLEEP}
|
|
/usr/bin/logger -t $0 -p ${LOGGER_NOTICE} "Initializing WAN Monitor & Failover Connection Manager"
|
|
initialize
|
|
|
|
for IFNAME_WAN in ${IFNAME_WAN_PRIMARY} ${IFNAME_WAN_SECONDARY}; do
|
|
if [ "x${IFNAME_WAN}" = "x" ]; then
|
|
/usr/bin/logger -t $0 -p ${LOGGER_CRITICAL} "Lack of logical interface for one of WAN connections!"
|
|
exit 1
|
|
fi
|
|
done
|
|
|
|
for GATEWAY_WAN in ${GATEWAY_WAN_PRIMARY} ${GATEWAY_WAN_SECONDARY}; do
|
|
if [ "x${GATEWAY_WAN}" = "x" ]; then
|
|
/usr/bin/logger -t $0 -p ${LOGGER_CRITICAL} "Lack of gateway on logical interface for one of WAN connections!"
|
|
exit 2
|
|
fi
|
|
done
|
|
|
|
/usr/bin/logger -t $0 -p ${LOGGER_DEBUG} "Primary WAN Interface: ${IFNAME_WAN_PRIMARY}, Gateway: ${GATEWAY_WAN_PRIMARY}, Metric: ${WAN_PRIMARY_METRIC:-0}"
|
|
/usr/bin/logger -t $0 -p ${LOGGER_DEBUG} "Secondary WAN Interface: ${IFNAME_WAN_SECONDARY}, Gateway: ${GATEWAY_WAN_SECONDARY}, Metric: ${WAN_SECONDARY_METRIC:-0}"
|
|
/usr/bin/logger -t $0 -p ${LOGGER_DEBUG} "Checking host: ${CHECK_HOST} every ${INTERVAL} seconds interval"
|
|
}
|
|
|
|
function status() {
|
|
echo -e "Primary WAN Interface: ${IFNAME_WAN_PRIMARY}, Gateway: ${GATEWAY_WAN_PRIMARY}, Metric: ${WAN_PRIMARY_METRIC:-0}"
|
|
echo -e "Secondary WAN Interface ${IFNAME_WAN_SECONDARY}, Gateway: ${GATEWAY_WAN_SECONDARY}, Metric: ${WAN_SECONDARY_METRIC:-0}"
|
|
echo -e "Checking host: ${CHECK_HOST} every ${INTERVAL} seconds interval"
|
|
echo
|
|
ACTIVE=$(/bin/ps | grep 'wanmonitor -d' | grep -v 'grep' | wc -l)
|
|
if [ "x${ACTIVE}" = "x0" ]; then
|
|
echo -e "WAN Monitor & Failover Connection Manager is NOT RUNNING"
|
|
else
|
|
echo -e "WAN Monitor & Failover Connection Manager is RUNNING"
|
|
fi
|
|
ACTIVE_INTERFACE=$(route | grep default | awk '{print $8}')
|
|
if [ "x${ACTIVE_INTERFACE}" = "x${IFNAME_WAN_PRIMARY}" ]; then
|
|
ACTIVE_WAN="${WAN_PRIMARY}"
|
|
elif [ "x${ACTIVE_INTERFACE}" = "x${IFNAME_WAN_SECONDARY}" ]; then
|
|
ACTIVE_WAN="${WAN_SECONDARY}"
|
|
else
|
|
ACTIVE_WAN="UNKNOWN"
|
|
fi
|
|
echo -e "Active WAN connection: ${ACTIVE_WAN}"
|
|
}
|
|
|
|
|
|
until [[ -z "${1}" ]]; do
|
|
case "${1}" in
|
|
-d|--daemon)
|
|
DAEMONIZE=1
|
|
;;
|
|
*)
|
|
echo "Unknown option: ${1}"
|
|
;;
|
|
|
|
esac
|
|
shift
|
|
done
|
|
|
|
if [ "x${DAEMONIZE}" = "x0" ]; then
|
|
initialize
|
|
status
|
|
exit 0
|
|
fi
|
|
|
|
prepare
|
|
/usr/bin/logger -t $0 -p ${LOGGER_NOTICE} "Entering link monitoring loop ..."
|
|
WAN=0
|
|
while true; do
|
|
WAN_PRIMARY_STATUS=$(ifstatus ${WAN_PRIMARY} | grep \"up\" | awk '{gsub(/[",]/, ""); print $2}')
|
|
if [ "x${WAN_PRIMARY_STATUS}" = "xtrue" ]; then
|
|
CHECK_HOST_ROUTE=$(route | grep ${CHECK_HOST} | grep ${IFNAME_WAN_PRIMARY} | wc -l)
|
|
if [ "x${CHECK_HOST_ROUTE}" = "x0" ]; then
|
|
/sbin/route add -host ${CHECK_HOST} gateway ${GATEWAY_WAN_PRIMARY} metric 0 ${IFNAME_WAN_PRIMARY} &>/dev/null
|
|
fi
|
|
WAN_PRIMARY_PING=$(ping -I ${IFNAME_WAN_PRIMARY} -w 3 -c 3 ${CHECK_HOST} 2>/dev/null | awk '/packets received/ {print $4}')
|
|
fi
|
|
if [ "x${WAN_PRIMARY_STATUS}" = "xfalse" ] || [ "x${WAN_PRIMARY_PING}" = "x0" ]; then
|
|
if [ "${WAN}" = "0" ] || [ "${WAN}" = "1" ]; then
|
|
/usr/bin/logger -t $0 -p ${LOGGER_ALERT} "Primary WAN Interface is DOWN! Switching traffic to ${WAN_SECONDARY}."
|
|
/sbin/route del default gw ${GATEWAY_WAN_PRIMARY} metric ${WAN_PRIMARY_METRIC:-0} ${IFNAME_WAN_PRIMARY} &>/dev/null
|
|
CHECK_SECONDARY_ROUTE=$(route | grep default | grep ${IFNAME_WAN_SECONDARY} | wc -l)
|
|
if [ "x${CHECK_SECONDARY_ROUTE}" = "x0" ]; then
|
|
/sbin/route add default gw ${GATEWAY_WAN_SECONDARY} metric ${WAN_SECONDARY_METRIC:-0} ${IFNAME_WAN_SECONDARY} &>/dev/null
|
|
fi
|
|
WAN=2
|
|
fi
|
|
else
|
|
if [ "${WAN}" = "0" ] || [ "${WAN}" = "2" ]; then
|
|
/usr/bin/logger -t $0 -p ${LOGGER_ALERT} "Primary WAN Interface is UP! Switching traffic to ${WAN_PRIMARY}."
|
|
/sbin/route del default gw ${GATEWAY_WAN_SECONDARY} metric ${WAN_SECONDARY_METRIC:-0} ${IFNAME_WAN_SECONDARY} &>/dev/null
|
|
CHECK_PRIMARY_ROUTE=$(route | grep default | grep ${IFNAME_WAN_PRIMARY} | wc -l)
|
|
if [ "x${CHECK_PRIMARY_ROUTE}" = "x0" ]; then
|
|
/sbin/route add default gw ${GATEWAY_WAN_PRIMARY} metric ${WAN_PRIMARY_METRIC:-0} ${IFNAME_WAN_PRIMARY} &>/dev/null
|
|
fi
|
|
WAN=1
|
|
fi
|
|
fi
|
|
sleep ${INTERVAL}
|
|
done
|