#!/bin/sh
#
# /etc/init.d/isdn-syncppp.init
#
# ISDN SyncPPP Configuration
#
# Copyright 1997 Peter Bieringer <pb@bieringer.de>
#
#
# Version: 2.02 Datum:  20.10.97
#
# Return Values:  0=ok  1=Nothing to do  2=Error occurs 

# Changes from i
# 2.00: Place route after ifconfig
# 2.01: Add a second number, if given


#set -x

# Source function library.
[ -f /etc/init.d/functions ] || exit 0
. /etc/init.d/functions

# Source networking configuration.
[ -f /etc/sysconfig/network ] || exit 0
. /etc/sysconfig/network

# Check if networking is up.
[ "$NETWORKING" = "yes" -o "$NETWORKING" = "YES" ] || exit 0

# Source ISDN Hardware Configuration
[ -f /etc/sysconfig/isdn-hw ] || exit 0
. /etc/sysconfig/isdn-hw

# Source ISDN SyncPPP Configuration
[ -f /etc/sysconfig/isdn ] || exit 0
. /etc/sysconfig/isdn-syncppp

# Check that ISDN SyncPPP is enabled
[ "$ISDNSyncPPP" = "yes" -o "$ISDNSyncPPP" = "YES" ] || exit 0

# Check that the given Binary for ISDN Control exists
[ -x $ISDNCTRLBIN ] || exit 0

#Get Kernel Version for module loading
VERSION=`cat /proc/version | awk '{ print $3 }' `

SYSPATH="/sbin"

# Check If ISDN Hardware Is Already Configured (isdn-hw.init start)
if ! [ -f /var/lock/subsys/isdn-hw ] ; then
	echo -e "\aNo ISDN Hardware Is Configured!"
	exit 1
fi

#set -x

case "$1" in
  start)
	echo "Starte ISDN SyncPPP Service."

	# Already done? Look in /var/lock/subsys for isdn-syncppp
	if [ -f /var/lock/subsys/isdn-syncppp ] ; then
		echo -e "\aAlready Done!"
		exit 1
	fi


    	# Do you wish masquerading intranet to internet
	if [ "$ISDN2PRIVATE" = "yes" -o "$ISDN2PRIVATE" = "YES" ]; then
		# load ip_masquerading modules
	    	echo -n "Load IP-Masquerading Modules:"
    		cd /lib/modules/${VERSION}/ipv4 
    		for i in ${IPMASQMODULES}; do 
			echo -n " $i"
			$SYSPATH/insmod $i;	
		done
		echo
    
		# Firewall-Setup for Masquerading intranet to internet
    		echo "Setup IP-Firewall Rules for Masquerading"
    		$SYSPATH/ipfwadm -F -a m -P all -S $PRIVATEIPNETWORK/24 -D 0.0.0.0/0 -b
		echo
	fi

        # Create new interface 'ISDNDEVICE'
    	echo "Add Device $ISDNFDEVICE"
    	$ISDNCTRLBIN addif $ISDNDEVICE

        # Configure interface 'ISDNDEVICE'
    	echo "Configure Device $DEVICE"
	
	# Set incoming phone-number
	$ISDNCTRLBIN addphone $ISDNDEVICE in $ISDNREMOTENUMBER
   
	# Set outgoing phone-number
 	$ISDNCTRLBIN addphone $ISDNDEVICE out $ISDNREMOTENUMBER
 
	# Set second outgoing phone-number, if given
	if ! [ "$ISDNREMOTENUMBER2" = "" ] ; then	
        	$ISDNCTRLBIN addphone $ISDNDEVICE out $ISDNREMOTENUMBER2
	fi

        # Set local EAZ .. 
	$ISDNCTRLBIN eaz $ISDNDEVICE $ISDNLOCALNUMBER

	# for sync PPP: set Level 2 to HDLC
    	$ISDNCTRLBIN l2_prot $ISDNDEVICE hdlc      
	
	# not really necessary, 'trans' is default
    	$ISDNCTRLBIN l3_prot $ISDNDEVICE trans     
    
	# encap the IP Pakets in PPP frames
	$ISDNCTRLBIN encap $ISDNDEVICE syncppp    
	
	# Hangup-Timeout is 600 sec.
    	$ISDNCTRLBIN huptimeout $ISDNDEVICE $ISDNHUPTIMEOUT    
   	
	# Dial up 1 time maximal (isdn.dial repeats self)
    	$ISDNCTRLBIN dialmax $ISDNDEVICE 1    
   	
	# Hangup before next Charge-Info {on|off}
	$ISDNCTRLBIN chargehup $ISDNDEVICE $ISDNCHARGEHUP  

	# Accept only configured phone-number
    	$ISDNCTRLBIN secure $ISDNDEVICE on   

	# SyncMPPP (Multi-Link)?
	if [ "$ISDNSyncMPPP" = "yes" -o "$ISDNSyncMPPP" = "YES" ]; then
		# Create New Slave Interface 'ISDNDEVICEM'
		$ISDNCTRLBIN addslave $ISDNDEVICE $ISDNDEVICEM
        
		# Configure slave interface 'ISDNDEVICEM'
		$ISDNCTRLBIN addphone $ISDNDEVICEM in $ISDNREMOTENUMBER
 		$ISDNCTRLBIN addphone $ISDNDEVICEM out $ISDNREMOTENUMBER
		$ISDNCTRLBIN eaz $ISDNDEVICEM $ISDNLOCALNUMBER
    		$ISDNCTRLBIN l2_prot $ISDNDEVICEM hdlc      
    		$ISDNCTRLBIN l3_prot $ISDNDEVICEM trans     
		$ISDNCTRLBIN encap $ISDNDEVICEM syncppp    
    		$ISDNCTRLBIN huptimeout $ISDNDEVICEM $ISDNHUPTIMEOUT    
		$ISDNCTRLBIN chargehup $ISDNDEVICEM $ISDNCHARGEHUP  
    		$ISDNCTRLBIN secure $ISDNDEVICEM on   
	fi

	# Choose Options dynamic or static
 	IPPPDOPTIONS=""
	IFCONFIGOOPTIONS=""
	
	# Dynamic IP PPP?
	if [ "$PPPIPDYNAMIC" = "yes" -o "$PPPIPDYNAMIC" = "YES" ]; then
		# Set ifconfig options for dynamic
		#IFCONFIGOPTIONS="10.0.0.0 pointopoint 10.0.0.0"
		#IFCONFIGOPTIONS="0.0.0.0 pointopoint 0.0.0.0"
		# Alexey means following is enough:
		IFCONFIGOPTIONS="0.0.0.0" 
		
		# Set ipppd Options for dynamic
		IPPPDOPTIONS="noipdefault useifip ipcp-accept-remote"
	else
		# Set ifconfig options for static
		IFCONFIGOPTIONS="$PPPIPLOCAL pointopoint $PPPIPREMOTE"
		
		# Set ipppd Options for static
		IPPPDOPTIONS=""
	fi
	
#set -x
	# Options for SyncMPPP
	if [ "$ISDNSyncMPPP" = "yes" -o "$ISDNSyncMPPP" = "YES" ]; then
		IPPPDOPTIONS="$IPPPDOPTIONS +mp"
	fi

	# Add option user if given
	[ "$PPPUSER" = "" ] || IPPPDOPTIONS="$IPPPDOPTIONS user $PPPUSER"

#set -x
	# Configure device
    	echo "Configure Device $DEVICE Point-to-Point"
	$SYSPATH/ifconfig $ISDNDEVICE $IFCONFIGOPTIONS metric 1 -arp -broadcast -allmulti

	# Start ipppd
	echo "Start ipppd"
	$IPPPDBIN $IPPPDOPTIONS \
        		-detach \
        		-bsdcomp \
			mru 1500 \
			-chap \
			-vj \
			-vjccomp \
  			-ac -pc \
        		debug \
	        	/dev/ippp0 /dev/ippp1 /dev/ippp2 &
			
   	# all done, set flag
	touch /var/lock/subsys/isdn-syncppp
	echo "Done!"
	;;
  stop)
	echo "Stoppe ISDN SyncPPP Service."
	
	# isdn-syncppp started?
	if ! [ -f /var/lock/subsys/isdn-syncppp ] ; then
		echo -e "\aAlready Done!"
		exit 1
	fi
	
	# Kill ipppd
    	echo "Kill ipppd "
	killproc ipppd
	echo

    	# Clear Default Route
	echo "Clear Default-Route to ISDN"
    	$SYSPATH/route del default dev $ISDNDEVICE

    	# Shutdown ISDN Device
	echo "Shutdown Device $ISDNDEVICE"
    	$SYSPATH/ifconfig $ISDNDEVICE down

    	# Remove ISDN Device
    	echo "Remove Device $ISDNDEVICE"	
    	$ISDNCTRLBIN delif $ISDNDEVICE 

	# Reconfigure back to normal
    	if [ "$ISDN2PRIVATE" = "yes" -o "$ISDN2PRIVATE" = "YES" ]; then
    		# Firewall-Setup Reset Rules
    		echo "Clear Firewall IP-Masquerading Rules"
    		$SYSPATH/ipfwadm -F -a m

		# unload ip_masquerading modules 
	    	echo "Unload IP-Masquerading Modules:"
    		cd /lib/modules/${VERSION}/ipv4 
    		for i in ${IPMASQMODULES}; do 
			echo -n " $i:"
			$SYSPATH/rmmod ${i%.o}
		done
		echo
	fi
	
   	# all done, clear flag
	rm -f /var/lock/subsys/isdn-syncppp
	echo "Done!"
	;;
  *)
	echo "Syntax: isdn-syncppp.init {start|stop}"
	exit 1
esac

#set +x

exit 0