#!/bin/sh
#
#  anytun
#
#  The secure anycast tunneling protocol (satp) defines a protocol used
#  for communication between any combination of unicast and anycast
#  tunnel endpoints.  It has less protocol overhead than IPSec in Tunnel
#  mode and allows tunneling of every ETHER TYPE protocol (e.g.
#  ethernet, ip, arp ...). satp directly includes cryptography and
#  message authentication based on the methodes used by SRTP.  It is
#  intended to deliver a generic, scaleable and secure solution for
#  tunneling and relaying of packets of any protocol.
#
#
#  Copyright (C) 2007-2008 Othmar Gsenger, Erwin Nindl, 
#                          Christian Pointner <satp@wirdorange.org>
#
#  This file is part of Anytun.
#
#  Anytun is free software: you can redistribute it and/or modify
#  it under the terms of the GNU General Public License version 3 as
#  published by the Free Software Foundation.
#
#  Anytun is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with anytun.  If not, see <http://www.gnu.org/licenses/>.
#

TARGET=`uname -s`

CXXFLAGS='-g -Wall -O2 -DLOG_SYSLOG -DLOG_FILE -DLOG_STDOUT'
LDFLAGS='-g -Wall -O2 -lboost_thread -lboost_serialization -lboost_system'

CRYPTO_LIB='gcrypt'
PASSPHRASE=1
ROUTING=1

print_usage() {
  echo "configure --help                    print this"
  echo "          --use-ssl-crypto          use ssl crypto library instead of libgcrypt"
  echo "          --disable-crypto          disable crypto at all (only NULL cipher)"
  echo "          --disable-passphrase      disable master key and salt passphrase"
  echo "          --disable-routing         disable built-in routing capability"
}

for arg
do
  case $arg in
  --use-ssl-crypto)
    CRYPTO_LIB='ssl'
  ;;
  --disable-crypto)
    CRYPTO_LIB='none'
  ;; 
  --disable-passphrase)
    PASSPHRASE=0
  ;;
  --disable-routing)
    ROUTING=0
  ;;
  --help)
    print_usage
    exit 0
  ;;
  *)
    echo "Unknown argument: $arg"
    print_usage
    exit 1
  ;;
  esac
done

rm -f include.mk
case $TARGET in 
	Linux)
		rm -rf tunDevice.cpp
		ln -sf linux/tunDevice.cpp 
    echo "loading Linux specific TUN Device"
	;;
	OpenBSD|FreeBSD|NetBSD)
		rm -rf tunDevice.cpp
		ln -sf bsd/tunDevice.cpp 
    echo "loading BSD specific TUN Device"
    CXXFLAGS=$CXXFLAGS' -I/usr/local/include'
    LDFLAGS=$LDFLAGS' -L/usr/local/lib'
	;;
	*)
		echo "Plattform not supported"
    exit 1
	;;
esac

case $CRYPTO_LIB in
  gcrypt)
    LDFLAGS=$LDFLAGS' -lgcrypt -lgpg-error'
    echo "using libgcrypt library"
  ;;
  ssl)
    CXXFLAGS=$CXXFLAGS' -DUSE_SSL_CRYPTO'
    LDFLAGS=$LDFLAGS' -lcrypto'
    echo "using ssl crypto library"
  ;;
  none)
    CXXFLAGS=$CXXFLAGS' -DNO_CRYPT'
    echo "NO_CRYPT_OBJ = 1" >> include.mk
    echo "disabling crypto"
  ;;
esac

if [ $PASSPHRASE -eq 0 ]; then
  CXXFLAGS=$CXXFLAGS' -DNO_PASSPHRASE'
  echo "disabling master key and salt passphrase"
fi

if [ $ROUTING -eq 0 ]; then
  CXXFLAGS=$CXXFLAGS' -DNO_ROUTING'
  echo "disabling built-in routing capability"
fi

cat >> include.mk <<EOF
# this file was created automatically
# do not edit this file directly 
# use ./configure instead

TARGET = $TARGET
CXX = gcc
CXXFLAGS = $CXXFLAGS
LD = gcc
LDFLAGS = $LDFLAGS
EOF

exit 0