#!/bin/bash

SDK_PATH="/home/diego/Scaricati/android-ndk-r10d/ndk-build"
APP_PLATFORM="android-19"

DEVEL=1
CONFIGH="config.h"
SDK="$SDK_PATH -C tmpdir"
TMP="tmpdir/jni/test.c"

rm -rf tmpdir
mkdir tmpdir
mkdir tmpdir/jni

cat >"tmpdir/jni/Android.mk" << EOF
LOCAL_PATH := \$(call my-dir)

include \$(CLEAR_VARS)
LOCAL_MODULE    := test
LOCAL_SRC_FILES := test.c
include \$(BUILD_EXECUTABLE)

EOF

cat >"tmpdir/jni/Application.mk" << EOF
APP_PLATFORM := $APP_PLATFORM

EOF


if [ -t 1 ]; then
	RED=""
	GREEN=""
	COL_RESET=""
fi

MISSING_DEFS=0


CFLAGS="${CFLAGS}"
if [ "${SYSROOT}xx" != "xx" ]; then
	CFLAGS="${CFLAGS} $(eval echo --sysroot=${SYSROOT} )"
fi

[ -z "$IPV6" ] && IPV6=yes

echo "#pragma once" > $CONFIGH
echo "/* This file is auto-generated by configure.sh */" >> $CONFIGH

if [[ "$IPV6" == "yes" ]]; then
	echo "#define USE_IPV6 1" >> $CONFIGH
fi

check_header()
{
	echo -n "[*] Checking header $1 ... "

	rm -f "$TMP" || exit 1
	echo -e "#include <sys/socket.h>\n#include <stdint.h>\n#include <$1>\nint main() {\n return 0; \n }\n" >"$TMP"

	$SDK &> "$TMP.log"
	if [ $? != 0 ]; then
		echo $RED "[NO]" $COL_RESET
		MISSING_DEFS=1
	else
	    	echo $GREEN "[YES]" $COL_RESET
		echo "#define $2 1" >> $CONFIGH
	fi
}

#############################################################################################

echo "[*] Checking system headers."

#############################################################################################
# is /usr/include/linux/if_pppox.h new enough to feature pppol2tpin6/pppol2tpv3in6
#
echo -n "[*] Checking if pppox can use pppol2tpin6.. "
rm -f "$TMP" || exit 1

cat >"$TMP" << EOF
#include <stdio.h>
#include <netinet/in.h>
#include <linux/if.h>
#include <linux/if_pppox.h>

void main()
{
	struct sockaddr_pppol2tpin6 *pppox;
	printf("%d\n", pppox->sa_family);
}
EOF

$SDK &> tmp.log
if [ $? != 0 ]; then
	echo $RED "[NO]" $COL_RESET
	MISSING_DEFS=1
else
	echo $GREEN "[YES]" $COL_RESET
	echo "#define USE_PPPOL2TPIN6 1" >> $CONFIGH
fi

#############################################################################################
# is /usr/include/linux/if_pppox.h new enough to feature pppol2tpv3
#
echo -n "[*] Checking if pppox can use pppol2tv3.. "
rm -f "$TMP" || exit 1

cat >"$TMP" << EOF
#include <stdio.h>
#include <netinet/in.h>
#include <linux/if.h>
#include <linux/if_pppox.h>

void main()
{
	struct sockaddr_pppol2tpv3 *pppox;
	printf("%d\n", pppox->sa_family);
}
EOF

$SDK &> tmp.log
if [ $? != 0 ]; then
	echo $RED "[NO]" $COL_RESET
	MISSING_DEFS=1
else
	echo $GREEN "[YES]" $COL_RESET
	echo "#define USE_PPPOL2TPV3 1" >> $CONFIGH
fi


#############################################################################################
# is /usr/include/linux/if_pppox.h new enough to feature pptp
#
echo -n "[*] Checking if pppox can use pptp.. "
rm -f "$TMP" || exit 1

cat >"$TMP" << EOF
#include <stdio.h>
#include <netinet/in.h>
#include <linux/if.h>
#include <linux/if_pppox.h>

void main()
{
	struct sockaddr_pppox *pppox;
	printf("%d\n", pppox->sa_addr.pptp.call_id);
}
EOF

$SDK &> tmp.log
if [ $? != 0 ]; then
	echo $RED "[NO]" $COL_RESET
	MISSING_DEFS=1
else
	echo $GREEN "[YES]" $COL_RESET
	echo "#define USE_PPPOX_PPTP 1" >> $CONFIGH
fi

#############################################################################################
# is /usr/include/linux/llc.h new enough to feature LLC_OPT_PKTINFO
#
echo -n "[*] Checking if llc can use LLC_OPT_PKTINFO.. "
rm -f "$TMP" || exit 1

cat >"$TMP" << EOF
#include <stdio.h>
#include <net/if.h>
#include <linux/llc.h>

void main()
{
	printf("%d\n", LLC_OPT_PKTINFO);
}
EOF

$SDK &> tmp.log
if [ $? != 0 ]; then
	echo $RED "[NO]" $COL_RESET
	MISSING_DEFS=1
else
	echo $GREEN "[YES]" $COL_RESET
	echo "#define USE_LLC_OPT_PKTINFO 1" >> $CONFIGH
fi

#############################################################################################
# Do glibc headers provides struct termios2

echo -n "[*] Checking if glibc headers provide termios2.. "
rm -f "$TMP" || exit 1

cat >"$TMP" << EOF
#include <sys/ioctl.h>
#include <sys/vt.h>
#include <termios.h>

int main()
{
	struct termios2 test;
}
EOF

$SDK &> tmp.log
if [ $? != 0 ]; then
	echo $RED "[NO]" $COL_RESET
	MISSING_DEFS=1
else
	echo $GREEN "[YES]" $COL_RESET
	echo "#define HAVE_TERMIOS2 1" >> $CONFIGH
fi

#############################################################################################

check_header linux/caif/caif_socket.h USE_CAIF
check_header linux/if_alg.h USE_IF_ALG
check_header linux/rds.h USE_RDS
check_header linux/vfio.h USE_VFIO
check_header linux/btrfs.h USE_BTRFS
check_header drm/drm.h USE_DRM
check_header drm/exynos_drm.h USE_DRM_EXYNOS
check_header sound/compress_offload.h USE_SNDDRV_COMPRESS_OFFLOAD
check_header linux/kvm.h USE_KVM
check_header linux/seccomp.h USE_SECCOMP
check_header linux/vhost.h USE_VHOST
check_header execinfo.h USE_BACKTRACE
check_header netatalk/at.h USE_APPLETALK
check_header netrom/netrom.h USE_NETROM
check_header netrose/rose.h USE_ROSE

rm -rf "$TMP.log"
rm -rf tmpdir

#############################################################################################

if [ "$MISSING_DEFS" == "1" ]; then
  echo "[-] Some header definitions were missing. This is not fatal."
  echo "    It usually means you're building on an older distribution which doesn't"
  echo "    have header files describing newer kernel features."
  echo "    Trinity will still compile and run, it just won't use those new features."
  echo "    Go ahead, and run 'make'"
fi

exit 0