Callmonitor: kurzes öffnen von Ports (Sesam, öffne dich)

export REQUEST_METHOD="POST"
export REMOTE_ADDR="127.0.0.1"
export CONTENT_TYPE="application/x-www-form-urlencoded"

POST_DATA="forwardrules:settings/rule0/activated=1"
export CONTENT_LENGTH=${#POST_DATA}

echo -n "$POST_DATA" | /usr/www/html/cgi-bin/webcm > /dev/null 

echo "port offen, gehe schlafen"
sleep 120
echo "wieder wach, schließe..."

export REQUEST_METHOD="POST"
export REMOTE_ADDR="127.0.0.1"
export CONTENT_TYPE="application/x-www-form-urlencoded"

POST_DATA="forwardrules:settings/rule0/activated=0"
export CONTENT_LENGTH=${#POST_DATA}

echo -n "$POST_DATA" | /usr/www/html/cgi-bin/webcm > /dev/null 

echo "wieder zu, viel spass!!"

cat <<'EOP' > /var/tmp/sesam

#!/bin/sh

#
# This script is runnning in loop for ever, checking a host's state by using 
# ping command. If host state changes from down to up forwarding rule 0
# becomes disabled and forwarding rule 1 becomes enabled. If host state
# changes from down to up forwarding rules will become changed vice versa. 
#

myHost=192.168.1.15          # ip adress
myCheckingInterval=15        # in seconds

myHostState=0                # state of myHost (0-down, 1-up)
                             # is used to recognize state-change
                             # so only if state changes, forwarding rules will become changed

SetForwarding()
{
        # This function enables/disables present forwarding rules
        # parameter 1 specifies the number of forwarding rule  (starting with 0)
        # parameter 2 specifies new state (0 - disabled, 1 - enabled) 

        export REQUEST_METHOD="POST"
        export REMOTE_ADDR="127.0.0.1"
        export CONTENT_TYPE="application/x-www-form-urlencoded"

        POST_DATA="forwardrules:settings/rule$1/activated=$2"
        export CONTENT_LENGTH=${#POST_DATA}
      
        echo -n "$POST_DATA" | /usr/www/html/cgi-bin/webcm > /dev/null
}

ForwardingToFritzBox()
{
        # disable must be called first
        SetForwarding 1 0       #(rule1, disable)
        SetForwarding 0 1       #(rule0, enable)

	# if script becomes started with & option to run in background
	# using echo command is not allowed (just for debugging)
        #echo "Forwarding to FritzBox is set"
}

ForwardingToMyHost()
{
        # disable must be called first
        SetForwarding 0 0       #(rule0, disabled)
        SetForwarding 1 1       #(rule1, enable)

	# if script becomes started with & option to run in background
	# using echo command is not allowed (just for debugging)
        #echo "Forwarding to MyHost is set"
}

# at init state host is down an forwarding is set to FritzBox
myHostState=0
ForwardingToFritzBox


# loop for ever to set forwarding rules
while [ 1 -ne 0 ]; do
        # reapet checking ever x second
        sleep $myCheckingInterval

        # execute ping command, only return value is used
        ping -q -c1 $myHost > /dev/null

        # depending on return value and state variable "myHostState" we make decision
        if [ "$?" -eq 0 ]; then
                # myHost is up
                if [ $myHostState -eq 0 ]; then
                        # myHostState changed to up, so set https forwarding to Netivsta
                        myHostState=1
                        ForwardingToMyHost
                fi
        else
                # myHost is down
                if [ $myHostState -ne 0 ]; then
                        # myHostState changed to down, so set https forwarding to FritzBox
                        myHostState=0 
                        ForwardingToFritzBox
                fi
        fi
done

exit 0