#-
# SPDX-License-Identifier: BSD-2-Clause
#
# Copyright (c) 2019 Ahsan Barkati
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD$
#

. $(atf_get_srcdir)/../../common/vnet.subr

firewall_config()
{
	jname=$1
	shift
	fw=$1
	shift

	while [ $# -gt 0 ]; do
		if [ $(is_firewall "$1") -eq  1 ]; then
			current_fw="$1"
			shift
			filename=${current_fw}.rule
			cwd=$(pwd)
			if [ -f ${current_fw}.rule ]; then
				rm ${current_fw}.rule
			fi
		fi
		rule=$1
		echo $rule >> $filename
		shift
	done

	if [ ${fw} == "ipfw" ]; then
		jexec ${jname} ipfw -q -f flush
		jexec ${jname} /bin/sh $cwd/ipfw.rule
	elif [ ${fw} == "pf" ]; then
		jexec ${jname} sysctl net.pf.filter_local=1
		jexec ${jname} pfctl -e
		jexec ${jname} pfctl -F all
		jexec ${jname} pfctl -f $cwd/pf.rule
	elif [ ${fw} == "ipf" ]; then
		jexec ${jname} ipf -E
		jexec ${jname} ipf -Fa -f $cwd/ipf.rule
	elif [ ${fw} == "ipfnat" ]; then
		jexec ${jname} service ipfilter start
		jexec ${jname} ipnat -CF -f $cwd/ipfnat.rule
		jexec ${jname} pfilctl link -o ipfilter:default-ip4 inet-local
		jexec ${jname} pfilctl link -o ipfilter:default-ip6 inet6-local
	else
		atf_fail "$fw is not a valid firewall to configure"
	fi
}

firewall_cleanup()
{
	firewall=$1
	echo "Cleaning $firewall"
	vnet_cleanup
}

firewall_init()
{
	firewall=$1
	vnet_init

	if [ ${firewall} == "ipfw" ]; then
		if ! kldstat -q -m ipfw; then
			atf_skip "This test requires ipfw"
		fi
	elif [ ${firewall} == "pf" ]; then
		if [ ! -c /dev/pf ]; then
			atf_skip "This test requires pf"
		fi
	elif [ ${firewall} == "ipf" ]; then
		if ! kldstat -q -m ipfilter; then
			atf_skip "This test requires ipf"
		fi
	elif [ ${firewall} == "ipfnat" ]; then
		if ! kldstat -q -m ipfilter; then
			atf_skip "This test requires ipf"
		fi
	else
		atf_fail "$fw is not a valid firewall to initialize"
	fi

}

dummynet_init()
{
	firewall=$1

	if ! kldstat -q -m dummynet; then
		atf_skip "This test requires dummynet"
	fi

	case $firewall in
	ipfw|pf)
		# Nothing. This is okay.
		;;
	*)
		atf_skip "${firewall} does not support dummynet"
		;;
	esac
}

nat_init()
{
	firewall=$1
	if [ ${firewall} == "ipfw" ]; then
		if ! kldstat -q -m ipfw_nat; then
			atf_skip "This test requires ipfw_nat"
		fi
	fi
}

is_firewall()
{
	if [ "$1" = "pf" -o "$1" = "ipfw" -o "$1" = "ipf" -o "$1" = "ipfnat" ]; then
		echo 1
	else
		echo 0
	fi
}