source: hybrid/branches/releng-10/nanobsd/files/tools/check-inet-alive@ 14531

#!/bin/sh

#

# Internet Connection Wrapper From Cron

#

# a) Disable lvrouted if the internet is down.

# b) Re-enable lvrouted if the internet is back up.

#

# XXX: Do we need build an fail-save for flapping states?

# XXX: Do we need to manage state, like DHCP here?

# XXX: Check if page output is actually the output expected and not some weird captive portal somewhere.

# XXX: For effiently reasons this should be combined with the nagios check_inet check

# 

# Rick van der Zwet <rick@wirelessleiden.nl>

#



TAG=`basename $0`

logit() {

  logger -t "$TAG" $*

}



# Check if we need to check inet at all

. /etc/rc.subr



load_rc_config "lvrouted"

load_rc_config "tinyproxy"



: ${lvouted_enable="NO"}

: ${tinyproxy_enable="NO"}

: ${service_ileiden="NO"}

: ${service_proxy="NO"}



control_lvrouted=false

control_tinyproxy=false

checkyesno service_proxy_ileiden && checkyesno lvouted_enable control_lvrouted=true

checkyesno service_proxy_normal && checkyesno tinyproxy_enable || control_tinyproxy=false





# Get current state of the daemons

lvouted_status="stopped"

tinyproxy_status="stopped"

service lvrouted onestatus > /dev/null && lvouted_status="running"

service tinyproxy onestatus > /dev/null && tinyproxy_status="running"



check_http() {

 fetch -o /dev/null -q $* 2>/dev/null

}



# Get connection stats for internet direct and via proxy

inet_status=up

proxy_status=up

check_http http://www.nu.nl || check_http http://ams-ix.net || inet_status=down

export HTTP_PROXY=${HTTP_PROXY-:http://proxy.wleiden.net:3128}

check_http http://tinyproxy.stats || check_http http://www.nu.net || proxy_status=down



# Log Network Status

cat <<EOF > /tmp/network.status

internet=$inet_status

proxy=$proxy_status

EOF



# Control connections

if $control_lvrouted; then

  if [ $lvrouted_status = "stopped" ] && [ $inet_status = "up" ]; then

    service lvrouted start | logit

  elif [ $lvrouted_status = "running" ] && [ $inet_status = "down" ]; then

    service lvrouted stop | logit

  fi

fi



if $control_tinyproxy; then

  if [ $tinyproxy_status = "stopped" ] && [ $inet_status = "up" ]; then

    service tinyproxy start | logit

  elif [ $tinyproxy_status = "running" ] && [ $inet_status = "down" ]; then

    service tinyproxy stop | logit

  fi

fi