configure

#! /bin/bash
# This is not an autconf generated configure
#
INCLUDE=${1:-"$PWD/include"}

function check_atm
{
cat >/tmp/atmtest.c <<EOF
#include <atm.h>
int main(int argc, char **argv) {
	struct atm_qos qos;
	(void) text2qos("aal5,ubr:sdu=9180,rx:none",&qos,0);
	return 0;
}
EOF
gcc -I$INCLUDE -o /tmp/atmtest /tmp/atmtest.c -latm >/dev/null 2>&1 
if [ $? -eq 0 ]
then
    echo "TC_CONFIG_ATM:=y" >>Config
    echo yes
else
    echo no
fi
rm -f /tmp/atmtest.c /tmp/atmtest
}

function check_xt
{
#check if we have xtables from iptables >= 1.4.5.
cat >/tmp/ipttest.c <<EOF
#include <xtables.h>
#include <linux/netfilter.h>
static struct xtables_globals test_globals = {
	.option_offset = 0,
	.program_name = "tc-ipt",
	.program_version = XTABLES_VERSION,
	.orig_opts = NULL,
	.opts = NULL,
	.exit_err = NULL,
};

int main(int argc, char **argv)
{
	xtables_init_all(&test_globals, NFPROTO_IPV4);
	return 0;
}

EOF

if gcc -I$INCLUDE $IPTC -o /tmp/ipttest /tmp/ipttest.c $IPTL -ldl -lxtables >/dev/null 2>&1
then
	echo "TC_CONFIG_XT:=y" >>Config
	echo "using xtables"
fi
rm -f /tmp/ipttest.c /tmp/ipttest
}

function check_xt_old
{
# bail if previous XT checks has already succeded.
if grep TC_CONFIG_XT Config > /dev/null
then
	return
fi

#check if we need dont our internal header ..
cat >/tmp/ipttest.c <<EOF
#include <xtables.h>
char *lib_dir;
unsigned int global_option_offset = 0;
const char *program_version = XTABLES_VERSION;
const char *program_name = "tc-ipt";
struct afinfo afinfo = {
	.libprefix      = "libxt_",
};

void exit_error(enum exittype status, const char *msg, ...)
{
}

int main(int argc, char **argv) {

	return 0;
}

EOF
gcc -I$INCLUDE $IPTC -o /tmp/ipttest /tmp/ipttest.c $IPTL -ldl >/dev/null 2>&1

if [ $? -eq 0 ]
then
	echo "TC_CONFIG_XT_OLD:=y" >>Config
	echo "using old xtables (no need for xt-internal.h)"
fi
rm -f /tmp/ipttest.c /tmp/ipttest
}

function check_xt_old_internal_h
{
# bail if previous XT checks has already succeded.
if grep TC_CONFIG_XT Config > /dev/null
then
	return
fi

#check if we need our own internal.h
cat >/tmp/ipttest.c <<EOF
#include <xtables.h>
#include "xt-internal.h"
char *lib_dir;
unsigned int global_option_offset = 0;
const char *program_version = XTABLES_VERSION;
const char *program_name = "tc-ipt";
struct afinfo afinfo = {
	.libprefix      = "libxt_",
};

void exit_error(enum exittype status, const char *msg, ...)
{
}

int main(int argc, char **argv) {

	return 0;
}

EOF
gcc -I$INCLUDE $IPTC -o /tmp/ipttest /tmp/ipttest.c $IPTL -ldl >/dev/null 2>&1

if [ $? -eq 0 ]
then
	echo "using old xtables with xt-internal.h"
	echo "TC_CONFIG_XT_OLD_H:=y" >>Config
fi
rm -f /tmp/ipttest.c /tmp/ipttest
}

function check_ipt
{
	if ! grep TC_CONFIG_XT Config > /dev/null
	then
		echo "using iptables"
	fi
}

echo "# Generated config based on" $INCLUDE >Config

echo "TC schedulers"

echo -n " ATM	"
check_atm

echo -n " IPT	"
check_xt
check_xt_old
check_xt_old_internal_h
check_ipt