# $FreeBSD$
#
# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
#
# Copyright (c) 2018 Kristof Provost <kp@FreeBSD.org>
#
# 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
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.

. $(atf_get_srcdir)/utils.subr

atf_test_case "exhaust" "cleanup"
exhaust_head()
{
	atf_set descr 'Test exhausting the NAT pool'
	atf_set require.user root
}

exhaust_body()
{
	if [ "$(atf_config_get ci false)" = "true" ]; then
		atf_skip "https://bugs.freebsd.org/244703"
	fi

	pft_init

	epair_nat=$(vnet_mkepair)
	epair_echo=$(vnet_mkepair)

	vnet_mkjail nat ${epair_nat}b ${epair_echo}a
	vnet_mkjail echo ${epair_echo}b

	ifconfig ${epair_nat}a 192.0.2.2/24 up
	route add -net 198.51.100.0/24 192.0.2.1

	jexec nat ifconfig ${epair_nat}b 192.0.2.1/24 up
	jexec nat ifconfig ${epair_echo}a 198.51.100.1/24 up
	jexec nat sysctl net.inet.ip.forwarding=1

	jexec echo ifconfig ${epair_echo}b 198.51.100.2/24 up
	jexec echo /usr/sbin/inetd $(atf_get_srcdir)/echo_inetd.conf

	# Enable pf!
	jexec nat pfctl -e
	pft_set_rules nat \
		"nat pass on ${epair_echo}a inet from 192.0.2.0/24 to any -> (${epair_echo}a) port 30000:30001 sticky-address"

	# Sanity check
	atf_check -s exit:0 -o ignore ping -c 3 198.51.100.2

	echo "foo" | nc -N 198.51.100.2 7
	echo "foo" | nc -N 198.51.100.2 7

	# This one will fail, but that's expected
	echo "foo" | nc -N 198.51.100.2 7 &

	sleep 1

	# If the kernel is stuck in pf_get_sport() this will not succeed either.
	timeout 2 jexec nat pfctl -sa
	if [ $? -eq 124 ]; then
		# Timed out
		atf_fail "pfctl timeout"
	fi
}

exhaust_cleanup()
{
	pft_cleanup
}

atf_init_test_cases()
{
	atf_add_test_case "exhaust"
}