#!/bin/bash 
  
 #### VARIABILI 
 SCRIPTNAME=`echo $0 | awk -vFS='/' '{print $NF}'` 
 EXEC=/hosthome${PWD#$HOME}${0#'.'} 
  
 waitfinish() 
 { 
     SEMAPHORE=$1.boot 
     touch $SEMAPHORE 
     while [ -f $SEMAPHORE ]; do 
         sleep 2 
     done 
     sleep 2 
 } 
  
 notifyfinish() 
 { 
     rm $1.boot 
 } 
  
 r_20_1=r_20_1-as20r1
 r_20_2=r_20_2-as20r2
 r_100_1=r_100_1-as100r1

  if ! [ `uname -r|tail -c 3` = "um" ]; then # only realhost takes arguments 
  
 case "$1" in 
  
   start)   ############## CREATE THE HOSTS FROM SCRATCH   
  
 	  if       [ -e $r_20_1.disk ] || 
       [ -e $r_20_2.disk ] || 
       [ -e $r_100_1.disk ]   ; then    
 	    echo "$0: some .disk file exists in this directory!" 
 	    echo " launch "$0 clean" first" 
 	    exit 1 
 	  fi 
  
 	  vstart  $r_20_1 --eth0=C --eth1=F  --new --exec=$EXEC 
 	  waitfinish $r_20_1 
 	  vstart  $r_20_2 --eth1=C --eth0=E  --new --exec=$EXEC 
 	  waitfinish $r_20_2 
 	  vstart  $r_100_1 --eth0=E --eth1=F --eth2=J  --new --exec=$EXEC 
 	  waitfinish $r_100_1 
 	    ;; 
   restart)   ############## CREATE THE HOSTS FROM SCRATCH   
  
 	  if       [ -e $r_20_1.disk ] || 
       [ -e $r_20_2.disk ] || 
       [ -e $r_100_1.disk ]   ; then    
 	    echo "$0: some .disk file does not exist!" 
 	    echo " launch "$0 start" instead" 
 	    exit 1 
 	  fi 
  
 	  vstart  $r_20_1 --eth0=C --eth1=F  --exec=$EXEC 
 	  waitfinish $r_20_1 
 	  vstart  $r_20_2 --eth1=C --eth0=E  --exec=$EXEC 
 	  waitfinish $r_20_2 
 	  vstart  $r_100_1 --eth0=E --eth1=F --eth2=J  --exec=$EXEC 
 	  waitfinish $r_100_1 
 	    ;; 
 
   halt) 
 	    vhalt $r_20_1 & 
 	    vhalt $r_20_2 & 
 	    vhalt $r_100_1 & 
 	    ;; 
  
   crash) 
 	    vcrash $r_20_1 & 
 	    vcrash $r_20_2 & 
 	    vcrash $r_100_1 & 
 	    ;; 
  
   clean) 
 	    rm -f $r_20_1.disk 
 	    rm -f $r_20_2.disk 
 	    rm -f $r_100_1.disk 
 	    ;; 
  
   *) 
 	    echo "Usage:$0 {start | halt | restart | crash | clean}" 
 	    exit 1 
 	    ;; 
 esac 
  
 else  # not realhost (virtual host to configure, does not take arguments) 
   SCRIPTFILE=`cat /proc/cmdline | awk -v FS== -v RS=' ' '{if($1=="exec") print $2}' ` 
   SCRIPTDIR=${SCRIPTFILE%/${SCRIPTNAME}} 
   cd $SCRIPTDIR  
 
 	if [ $HOSTNAME = $r_20_1 ]; then 
  
 /sbin/ifconfig eth0 20.1.1.1 netmask 255.255.255.0 up 
 /sbin/ifconfig eth1 11.0.0.6 netmask 255.255.255.252 up 
 
## NORIP 
## OKBGP 
 	  cat > /etc/zebra/bgpd.conf <<EOF
! 
 password zebra 
!Start of Policy Configuration
!
!End of Policy Configuration
!
router bgp 20
	network 0.0.0.0/0
	redistribute connected
	neighbor EBGP peer-group
	neighbor 11.0.0.5 remote-as 100
	neighbor 11.0.0.5 description Router as100r1
	neighbor 11.0.0.5 peer-group EBGP
	neighbor IBGP peer-group
	neighbor 20.1.1.2 remote-as 20
	neighbor 20.1.1.2 description Router as100r2
	neighbor 20.1.1.2 peer-group IBGP
! 
EOF
  
 ## ZEBRAOK 
 	  cat > /etc/zebra/daemons <<EOF
 # This file tells the zebra package  
 # which daemons to start. 
 zebra=yes 
 bgpd=yes 
 ospfd=no 
 ospf6d=no 
 ripd=no 
 ripngd=no 
EOF
  
 	  /etc/init.d/zebra start 
  
  
 	fi 
  
 	if [ $HOSTNAME = $r_20_2 ]; then 
  
 /sbin/ifconfig eth0 11.0.0.2 netmask 255.255.255.252 up 
 /sbin/ifconfig eth1 20.1.1.2 netmask 255.255.255.0 up 
 
## NORIP 
## OKBGP 
 	  cat > /etc/zebra/bgpd.conf <<EOF
! 
 password zebra 
!Start of Policy Configuration
!
!End of Policy Configuration
!
router bgp 20
	network 0.0.0.0/0
	redistribute connected
	neighbor EBGP peer-group
	neighbor 11.0.0.1 remote-as 100
	neighbor 11.0.0.1 description Router as100r1
	neighbor 11.0.0.1 peer-group EBGP
	neighbor IBGP peer-group
	neighbor 20.1.1.1 remote-as 20
	neighbor 20.1.1.1 description Router as100r2
	neighbor 20.1.1.1 peer-group IBGP
! 
EOF
  
 ## ZEBRAOK 
 	  cat > /etc/zebra/daemons <<EOF
 # This file tells the zebra package  
 # which daemons to start. 
 zebra=yes 
 bgpd=yes 
 ospfd=no 
 ospf6d=no 
 ripd=no 
 ripngd=no 
EOF
  
 	  /etc/init.d/zebra start 
  
  
 	fi 
  
 	if [ $HOSTNAME = $r_100_1 ]; then 
  
 /sbin/ifconfig eth0 11.0.0.1 netmask 255.255.255.252 up 
 /sbin/ifconfig eth1 11.0.0.5 netmask 255.255.255.252 up 
 /sbin/ifconfig eth2 100.1.0.1 netmask 255.255.0.0 up 
 
## NORIP 
## OKBGP 
 	  cat > /etc/zebra/bgpd.conf <<EOF
! 
 password zebra 
!Start of Policy Configuration
!
!End of Policy Configuration
!
router bgp 100
	network 100.1.0.0/16
	redistribute connected
	neighbor EBGP peer-group
	neighbor 11.0.0.2 remote-as 20
	neighbor 11.0.0.2 description Router as20r2 (primary)
	neighbor 11.0.0.2 peer-group EBGP
	neighbor 11.0.0.6 remote-as 20
	neighbor 11.0.0.6 description Router as20r1 (backup)
	neighbor 11.0.0.6 peer-group EBGP
! 
EOF
  
 ## ZEBRAOK 
 	  cat > /etc/zebra/daemons <<EOF
 # This file tells the zebra package  
 # which daemons to start. 
 zebra=yes 
 bgpd=yes 
 ospfd=no 
 ospf6d=no 
 ripd=no 
 ripngd=no 
EOF
  
 	  /etc/init.d/zebra start 
  
  
 	fi 
  
 	 
 notifyfinish $HOSTNAME 
  
  
 fi # end of if realhost