#!/bin/sh
#
# /etc/rc.d/rc.routing.table
# Version: 20011021-1
#
# Leest route tabel uit de files in $ROUTEDIR en stelt 
# stelt de routes vervolgens in.
#
# 20010227-1 First version
#
# 20010307-1 Commentaar in route-files is nu mogelijk.
#            Tekst na #-teken wordt genegeerd.
#
# 20010517-1 Verwijdering van bestaande routes zodat dit script periodiek
#            via cron kan worden uitgevoerd.
#
# 20010815-1 Gateway adress in combinatie met netwerk/mask is nu mogelijk.
#
# 20010815-2 improve debugging (write to log-file)
#
# 20010817-1 resolve bug in routing of host via GW via tunnel.
# 
# 20011021-1 routering voor gebruikers van pi1shb toegevoegd.
#

ROUTEDIR=/etc/routes 
LOGDIR=/var/log/routes
LOGFILE=$LOGDIR/`date +%y%m%d`.log

GWLAP1k2="44.137.24.103"
GWLAP1k2best="44.137.24.7"
GWLAP4k8=$GWLAP1k2
GWLAP4k8best="44.137.24.7"
GWLAP9k6=$GWLAP1k2
GWLAP19k2=
GWLAP76k8=$GWLAP1k2
GWLAP23cm=$GWLAP1k2
GWLAP13cm="44.137.27.126"

INTF1k2="scc0"
INTF1k2best=
INTF4k8="scc1"
INTF4k8best=
INTF9k6="scc2"
INTF19k2="scc4"
INTF76k8="scc1"
INTF23cm="scc3"
INTF13cm="dmascc0"

LAPS="1k2 4k8 9k6 19k2 76k8 23cm 4k8best 13cm"  # 1k2best, en nog toe voegen.

TUNNEL=no	# Alleen activeren als deze host zelf tunnelt


############################################################
#                                                          #
#  De regels hieronder hoeven niet te worden aangepast.    #
#                                                          #
############################################################

# Eerst kijken of de log directory en file bestaan, en indien nodig deze aanmaken.
if [ ! -d $LOGDIR ] ; then
  /bin/mkdir -p $LOGDIR
fi
gunzip $LOGFILE 2>/dev/null
echo "# # # # # # # # # # # # # # # # # # # # # # # # # # # # # #" >> $LOGFILE
date >> $LOGFILE

# Quick & Dirty manier om te kijken of de -v optie (verbose) is meegegeven 
# op de command-line.
if [ ! -z $1 ] ; then
  if [ $1 = "-v" ] || [ $1 = "--verbose" ] ; then
  VERBOSE=1
  fi
else
  VERBOSE=""
fi

MYIPADDR=`/sbin/ifconfig eth0 | grep inet | cut -d : -f 2 | cut -d " " -f 1`

# zet de Ethernet-variabele, maar filter mijzelf uit de lijst.
Ethernet=`cat $ROUTEDIR/ethernet | cut -d "#" -f 1 | grep -vw $MYIPADDR`

for HOST in $Ethernet
do
  if ! /sbin/route add $HOST window 4096 eth0 2>/dev/null; then
    [ $VERBOSE ] && echo -n "Route for $HOST exists, removing old route first. "
    echo "/sbin/route del $HOST" >> $LOGFILE
	  /sbin/route del $HOST 1>> $LOGFILE 2>> $LOGFILE
    [ $VERBOSE ] && echo "Adding route for $HOST window 4096 via eth0"
    echo "/sbin/route add $HOST window 4096 eth0" >> $LOGFILE
	  /sbin/route add $HOST window 4096 eth0 1>> $LOGFILE 2>> $LOGFILE
  fi
done



##################################################
# HostViaGateway function                        #
#                                                # 
#  inputs:  $HOST $GW $VERBOSE $LOGFILE          # 
#                                                # 
##################################################
HostViaGateway ()
{
    if ! /sbin/route add $HOST gw $GW 2>/dev/null; then
      [ $VERBOSE ] && echo -n "Route for $HOST exists, removing old route first. "
      echo "/sbin/route del $HOST" >> $LOGFILE
	    /sbin/route del $HOST 1>> $LOGFILE 2>> $LOGFILE
	    # and again, just in case there were multiple routes set.
	    /sbin/route del $HOST 1> /dev/null 2> /dev/null
    fi
    [ $VERBOSE ] && echo "Adding route for $HOST via $GW"
    echo "/sbin/route add $HOST gw $GW" >> $LOGFILE
	  /sbin/route add $HOST gw $GW 1>> $LOGFILE 2>> $LOGFILE
    return 0
}



##################################################
# NetViaGateway function                         #
#                                                # 
#  inputs:  $HOST $GW $VERBOSE $LOGFILE          # 
#                                                # 
##################################################
NetViaGateway ()
{
    if ! /sbin/route add -net $HOST gw $GW 2>/dev/null; then
      [ $VERBOSE ] && echo -n "Route for $HOST exists, removing old route first. "
      echo "/sbin/route del -net $HOST" >> $LOGFILE
	    /sbin/route del -net $HOST 1>> $LOGFILE 2>> $LOGFILE
	    # and again, just in case there were multiple routes set.
	    /sbin/route del -net $HOST 1> /dev/null 2> /dev/null
    fi
    [ $VERBOSE ] && echo "Adding route for $HOST via $GW"
    echo "/sbin/route add -net $HOST gw $GW" >> $LOGFILE
	  /sbin/route add -net $HOST gw $GW 1>> $LOGFILE 2>> $LOGFILE
    return 0
}



##################################################
#  SetRoute function                             #
#                                                #
#  inputs:  $HOST $GW $INTF $MYIPADDR $VERBOSE   #
#                                                #
##################################################

SetRoute ()
{
    NETADDR=`echo $HOST | grep /`
    GWADDR=`echo $HOST | grep ">"`


    ### Routing of (sub-)network addres via a gateway ###
    if [ "$GWADDR" ] && [ "$NETADDR" ]; then
      [ $VERBOSE ] && echo -e "\nRouting of (sub-)network addres via a gateway..."
      if [ "$GW" = "$MYIPADDR" ]; then
        [ $VERBOSE ] && echo GW is MYIPADDR
	GW=`echo $HOST | cut -d ">" -f 2`  # replace GW with the real gateway.
	HOST=`echo $HOST | cut -d ">" -f 1`
	NetViaGateway
      else
	HOST=`echo $HOST | cut -d ">" -f 1`
	NetViaGateway
      fi
    return 0
    fi

    ### Routing of hosts via a gateway ###
    if [ $GWADDR ]; then
      [ $VERBOSE ] && echo -e "\nRouting of hosts via a gateway..."
      if [ "$GW" = "$MYIPADDR" ]; then
        [ $VERBOSE ] && echo GW is MYIPADDR
	GW=`echo $HOST | cut -d ">" -f 2`  # replace GW with the real gateway.
	HOST=`echo $HOST | cut -d ">" -f 1`
	HostViaGateway
      else
        HOST=`echo $HOST | cut -d ">" -f 1`
	HostViaGateway
      fi
    return 0
    fi
  

    if [ $NETADDR ]; then
      [ $VERBOSE ] && echo -e "\nRouting of (sub-)network..."
      if [ "$GW" = "$MYIPADDR" ]; then
        if ! /sbin/route add -net $HOST $INTF 2>/dev/null; then
	  [ $VERBOSE ] && echo -n "Route for $HOST exists, removing old route first. "
	  echo "/sbin/route del -net $HOST" >> $LOGFILE
		/sbin/route del -net $HOST 1>> $LOGFILE 2>> $LOGFILE
          [ $VERBOSE ] && echo "Adding route for $HOST via $GW"
          echo "/sbin/route add -net $HOST $INTF" >> $LOGFILE
		/sbin/route add -net $HOST $INTF 1>> $LOGFILE 2>> $LOGFILE
	fi
      else
        if ! /sbin/route add -net $HOST gw $GW 2>/dev/null; then
	  [ $VERBOSE ] && echo -n "Route for $HOST exists, removing old route first. "
	  echo "/sbin/route del -net $HOST" >> $LOGFILE
		/sbin/route del -net $HOST 1>> $LOGFILE 2>> $LOGFILE
          [ $VERBOSE ] && echo "Adding route for $HOST via $GW"
          echo "/sbin/route add -net $HOST gw $GW" >> $LOGFILE
		/sbin/route add -net $HOST gw $GW 1>> $LOGFILE 2>> $LOGFILE
        fi
      fi
    return 0
    fi

    ### Routing of hosts ###
      [ $VERBOSE ] && echo -e "\nRouting of hosts..."
      if [ "$GW" = "$MYIPADDR" ]; then
        [ $VERBOSE ] && echo GW is MYIPADDR
	HOST=`echo $HOST | cut -d ">" -f 1`
	if ! /sbin/route add $HOST $INTF 2>/dev/null; then
          [ $VERBOSE ] && echo -n "Route for $HOST exists, removing old route first. "
	  echo "/sbin/route del $HOST" >> $LOGFILE
		/sbin/route del $HOST 1>> $LOGFILE 2>> $LOGFILE
        fi
	[ $VERBOSE ] && echo "Adding route for $HOST via $INTF"
	echo "/sbin/route add $HOST $INTF" >> $LOGFILE
	      /sbin/route add $HOST $INTF 1>> $LOGFILE 2>> $LOGFILE
      else
        HOST=`echo $HOST | cut -d ">" -f 1`
	HostViaGateway
      fi
    return 0
}

#  SetRoute procedure                            
##################################################



for LAP in $LAPS
do
  for HOST in `cat $ROUTEDIR/lap$LAP | cut -d "#" -f 1`
  do
    eval GW=\$GWLAP$LAP
    eval INTF=\$INTF$LAP
    SetRoute
  done
done


if [ $TUNNEL = "y" ] || [ $TUNNEL = "Y" ] || [ $TUNNEL = "yes" ]; then
  /sbin/route add -net 0.0.0.0 netmask 0.0.0.0 metric 128 tunl0
  for HOST in `cat $ROUTEDIR/tunnel | cut -d "#" -f 1`
  do
    GW="$MYIPADDR"
    INTF=tunl0
    SetRoute
  done
fi


#####################################
### routes voor gebruikers pi1shb ###
#####################################
if [ $MYIPADDR != "44.137.24.40" ]; then
  for HOST in `cat $ROUTEDIR/pi1shb | cut -d "#" -f 1`
  do
    GW="pi1ehv"
    HostViaGateway
  done
fi

sleep 1
gzip $LOGFILE