forward.sh

#
# SPDX-License-Identifier: BSD-2-Clause
#
# Copyright (c) 2017 Kristof Provost <[email protected]>
#
# 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.

. $(atf_get_srcdir)/utils.subr

common_dir=$(atf_get_srcdir)/../common

atf_test_case "v4" "cleanup"
v4_head()
{
	atf_set descr 'Basic forwarding test'
	atf_set require.user root

	# We need scapy to be installed for out test scripts to work
	atf_set require.progs python3 scapy
}

v4_body()
{
	pft_init

	epair_send=$(vnet_mkepair)
	ifconfig ${epair_send}a 192.0.2.1/24 up

	epair_recv=$(vnet_mkepair)
	ifconfig ${epair_recv}a up

	vnet_mkjail alcatraz ${epair_send}b ${epair_recv}b
	jexec alcatraz ifconfig ${epair_send}b 192.0.2.2/24 up
	jexec alcatraz ifconfig ${epair_recv}b 198.51.100.2/24 up
	jexec alcatraz sysctl net.inet.ip.forwarding=1
	jexec alcatraz arp -s 198.51.100.3 00:01:02:03:04:05
	route add -net 198.51.100.0/24 192.0.2.2

	# Sanity check, can we forward ICMP echo requests without pf?
	atf_check -s exit:0 ${common_dir}/pft_ping.py \
		--sendif ${epair_send}a \
		--to 198.51.100.3 \
		--recvif ${epair_recv}a

	jexec alcatraz pfctl -e

	# Forward with pf enabled
	pft_set_rules alcatraz "block in"
	atf_check -s exit:1 ${common_dir}/pft_ping.py \
		--sendif ${epair_send}a \
		--to 198.51.100.3 \
		--recvif ${epair_recv}a

	pft_set_rules alcatraz "block out"
	atf_check -s exit:1 ${common_dir}/pft_ping.py \
		--sendif ${epair_send}a \
		--to 198.51.100.3 \
		--recv ${epair_recv}a

	# Allow ICMP
	pft_set_rules alcatraz "block in" "pass in proto icmp"
	atf_check -s exit:0 ${common_dir}/pft_ping.py \
		--sendif ${epair_send}a \
		--to 198.51.100.3 \
		--recvif ${epair_recv}a
}

v4_cleanup()
{
	pft_cleanup
}

atf_test_case "v6" "cleanup"
v6_head()
{
	atf_set descr 'Basic IPv6 forwarding test'
	atf_set require.user root
	atf_set require.progs python3 scapy
}

v6_body()
{
	pft_init

	epair_send=$(vnet_mkepair)
	epair_recv=$(vnet_mkepair)

	ifconfig ${epair_send}a inet6 2001:db8:42::1/64 up no_dad -ifdisabled
	ifconfig ${epair_recv}a up

	vnet_mkjail alcatraz ${epair_send}b ${epair_recv}b

	jexec alcatraz ifconfig ${epair_send}b inet6 2001:db8:42::2/64 up no_dad
	jexec alcatraz ifconfig ${epair_recv}b inet6 2001:db8:43::2/64 up no_dad
	jexec alcatraz sysctl net.inet6.ip6.forwarding=1
	jexec alcatraz ndp -s 2001:db8:43::3 00:01:02:03:04:05
	route add -6 2001:db8:43::/64 2001:db8:42::2

	# Sanity check, can we forward ICMP echo requests without pf?
	atf_check -s exit:0 ${common_dir}/pft_ping.py \
		--sendif ${epair_send}a \
		--to 2001:db8:43::3 \
		--recvif ${epair_recv}a

	jexec alcatraz pfctl -e

	# Block incoming echo request packets
	pft_set_rules alcatraz \
		"block in inet6 proto icmp6 icmp6-type echoreq"
	atf_check -s exit:1 ${common_dir}/pft_ping.py \
		--sendif ${epair_send}a \
		--to 2001:db8:43::3 \
		--recvif ${epair_recv}a

	# Block outgoing echo request packets
	pft_set_rules alcatraz \
		"block out inet6 proto icmp6 icmp6-type echoreq"
	atf_check -s exit:1 -e ignore ${common_dir}/pft_ping.py \
		--sendif ${epair_send}a \
		--to 2001:db8:43::3 \
		--recvif ${epair_recv}a

	# Allow ICMPv6 but nothing else
	pft_set_rules alcatraz \
		"block out" \
		"pass out inet6 proto icmp6"
	atf_check -s exit:0 ${common_dir}/pft_ping.py \
		--sendif ${epair_send}a \
		--to 2001:db8:43::3 \
		--recvif ${epair_recv}a

	# Allowing ICMPv4 does not allow ICMPv6
	pft_set_rules alcatraz \
		"block out inet6 proto icmp6 icmp6-type echoreq" \
		"pass in proto icmp"
	atf_check -s exit:1 ${common_dir}/pft_ping.py \
		--sendif ${epair_send}a \
		--to 2001:db8:43::3 \
		--recvif ${epair_recv}a
}

v6_cleanup()
{
	pft_cleanup
}

atf_init_test_cases()
{
	atf_add_test_case "v4"
	atf_add_test_case "v6"
}