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#!/bin/sh
#
#  �Anytun
#
#  �Anytun is a tiny implementation of SATP. Unlike Anytun which is a full
#  featured implementation �Anytun has no support for multiple connections
#  or synchronisation. It is a small single threaded implementation intended
#  to act as a client on small platforms.
#  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 Christian Pointner <equinox@anytun.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`

CFLAGS='-g -O2'
LDFLAGS='-g -Wall -O2'

CRYPTO_LIB='gcrypt'
ANYTUN_02_COMPAT=0
V4_MAPPED=1

for arg
do
  case $arg in
  --use-ssl-crypto)
    CRYPTO_LIB='ssl'
  ;;
  --disable-crypto)
    CRYPTO_LIB='none'
  ;; 
  --enable-anytun02-compat)
    ANYTUN_02_COMPAT=1
  ;;
  --disable-v4-mapped)
    V4_MAPPED=0 
  ;; 
  *)
    echo "Unknown argument: $arg"
    exit 1
  ;;
  esac
done

rm -f include.mk
case $TARGET in 
	Linux)
		rm -rf tun.c
		ln -sf linux/tun.c
    echo "loading Linux specific TUN Device"
    LDFLAGS=$LDFLAGS" -ldl"
	;;
	OpenBSD|FreeBSD|NetBSD)
		rm -rf tun.c
		ln -sf bsd/tun.c
    echo "loading BSD specific TUN Device"
    CFLAGS=$CFLAGS' -I/usr/local/include'
    LDFLAGS=$LDFLAGS' -L/usr/local/lib'
    if [ '$TARGET' == 'OpenBSD' ]; then
      V4_MAPPED=0
    fi
	;;
	*)
		echo "Plattform not supported"
    exit 1;
	;;
esac


case $CRYPTO_LIB in
  gcrypt)
    LDFLAGS=$LDFLAGS' -lgcrypt -lgpg-error'
    echo "Using libgcrypt library"
  ;;
  ssl)
    CFLAGS=$CFLAGS' -DUSE_SSL_CRYPTO'
    LDFLAGS=$LDFLAGS' -lcrypto'
    echo "Using ssl crypto library"
  ;;
  none)
    CFLAGS=$CFLAGS' -DNO_CRYPT'
    echo "Disabling crypto"
  ;;
esac

if [ $ANYTUN_02_COMPAT -eq 1 ]; then
  CFLAGS=$CFLAGS' -DANYTUN_02_COMPAT'
  echo "enbabling anytun 0.2 crypto compatiblity mode"
fi

if [ $V4_MAPPED -eq 0 ]; then
  CFLAGS=$CFLAGS' -DNO_UDPV6'
  echo "WARNING: disabling V4 mapped addresses, this prevents uanytun from using IPv6 as outer Protocol"
fi

cat >> include.mk <<EOF
TARGET = $TARGET
CC = gcc
CFLAGS = $CFLAGS
LD = gcc
LDFLAGS = $LDFLAGS
EOF

exit 0