#!/bin/sh -x
#
# $Id: netbsd.sh,v 1.7 2005/06/02 18:32:13 dgregoire Exp $
#
# This source code copyright (c) Hexago Inc. 2002-2005.
#
# LICENSE NOTICE: You may use and modify this source code only if you
# have executed a valid license agreement with Hexago Inc. granting
# you the right to do so, the said license agreement governing such
# use and modifications.   Copyright or other intellectual property
# notices are not to be removed from the source code.
#

LANGUAGE=C

if [ -z $TSP_VERBOSE ]; then
   TSP_VERBOSE=0
fi

KillProcess()
{
   if [ ! -z $TSP_VERBOSE ]; then
      if [ $TSP_VERBOSE -ge 2 ]; then
         echo killing $*
      fi
   fi
   PID=`ps axww | grep $1 | grep -v grep | awk '{ print $1;}'`
   echo $PID
   if [ ! -z $PID ]; then
      kill $PID
   fi
}

Display()
{
   if [ -z $TSP_VERBOSE ]; then
      return;
   fi
   if [ $TSP_VERBOSE -lt $1 ]; then
      return;
   fi
   shift
   echo $*
}

Exec()
{
   if [ ! -z $TSP_VERBOSE ]; then
      if [ $TSP_VERBOSE -ge 2 ]; then
         echo $*
      fi
   fi
   $* # Execute command
   if [ $? -ne 0 ]; then
      echo "Error while executing $1"
      echo "   Command: $*"
      exit 1
   fi
}

ExecNoCheck()
{
   if [ ! -z $TSP_VERBOSE ]; then
      if [ $TSP_VERBOSE -ge 2 ]; then
         echo $*
      fi
   fi
   $* # Execute command
}

# Programs localization 

Display 1 "--- Start of configuration script. ---"
Display 1 "Script: " `basename $0`

ifconfig=/sbin/ifconfig
route=/sbin/route
rtadvd=/usr/sbin/rtadvd
sysctl=/sbin/sysctl

if [ -z $TSP_HOME_DIR ]; then
   echo "TSP_HOME_DIR variable not specified!;"
   exit 1
fi

if [ ! -d $TSP_HOME_DIR ]; then
   echo "Error : directory $TSP_HOME_DIR does not exist"
   exit 1
fi
#

if [ -z $TSP_HOST_TYPE ]; then
   echo Error: TSP_HOST_TYPE not defined.
   exit 1
fi

if [ X"${TSP_HOST_TYPE}" = X"host" ] || [ X"${TSP_HOST_TYPE}" = X"router" ]; then
   #
   # Configured tunnel config (IPv4)
   Display 1 Setting up interface $TSP_TUNNEL_INTERFACE

   # Check if interface exists 
   $ifconfig $TSP_TUNNEL_INTERFACE >/dev/null 2>/dev/null
   if [ $? -eq 0 ]; then
      # Deconfiguration
      ExecNoCheck $ifconfig $TSP_TUNNEL_INTERFACE deletetunnel
      # Looking if the interface has already an IPv6 configuration
      list=`$ifconfig $TSP_TUNNEL_INTERFACE | grep inet6 | awk '{print $2}' | grep -v '^fe80'`
      for ipv6address in $list
      do 
        Exec $ifconfig $TSP_TUNNEL_INTERFACE inet6 $ipv6address delete
      done
   else
      # We enter here only in netbsd >1.6 (clone interface)
      Exec $ifconfig $TSP_TUNNEL_INTERFACE create
   fi
   Exec $ifconfig $TSP_TUNNEL_INTERFACE tunnel $TSP_CLIENT_ADDRESS_IPV4 $TSP_SERVER_ADDRESS_IPV4

   # Configured tunnel config (IPv6) 

   Exec $ifconfig $TSP_TUNNEL_INTERFACE inet6 $TSP_CLIENT_ADDRESS_IPV6 $TSP_SERVER_ADDRESS_IPV6 prefixlen $TSP_TUNNEL_PREFIXLEN alias
   Exec $ifconfig $TSP_TUNNEL_INTERFACE mtu 1280
   # 
   # Default route  
   Display 1 Adding default route to $TSP_SERVER_ADDRESS_IPV6

   # Delete first any default IPv6 route
   ExecNoCheck $route delete -inet6 default
   Exec $route add -inet6 default $TSP_SERVER_ADDRESS_IPV6
fi

# Router configuration if required
if [ X"${TSP_HOST_TYPE}" = X"router" ]; then
   Display 1 "Router configuration"
   Display 1 "Kernel setup"

   if [ X"${TSP_PREFIXLEN}" != X"64" ]; then
      ExecNoCheck $route add -inet6 $TSP_PREFIX::  -prefixlen $TSP_PREFIXLEN ::1 -interface
   fi
   Exec $sysctl -w net.inet6.ip6.forwarding=1     # ipv6_forwarding enabled
   Exec $sysctl -w net.inet6.ip6.accept_rtadv=0   # routed must disable any router advertisement incoming
   Exec $ifconfig $TSP_HOME_INTERFACE inet6 $TSP_PREFIX::1 prefixlen 64 alias
   # Router advertisement startup
   KillProcess rtadvd
   Exec $rtadvd $TSP_HOME_INTERFACE
fi

Display 1 "--- End of configuration script. ---"

exit 0