freebsd-dev/tests/sys/netpfil/pf/pass_block.sh
Kristof Provost 6b52139eb8 pf tests: Test unicast reverse path forwarding check
Ensure that pf's urpf-failed keyword works as expected.

PR:		253479
MFC after:	1 week
Reviewed by:	melifaro@
Differential Revision:	https://reviews.freebsd.org/D28694
2021-02-16 10:48:58 +01:00

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# $FreeBSD$
#
# 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
# 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 pass/block test for IPv4'
atf_set require.user root
}
v4_body()
{
pft_init
epair=$(vnet_mkepair)
ifconfig ${epair}a 192.0.2.1/24 up
# Set up a simple jail with one interface
vnet_mkjail alcatraz ${epair}b
jexec alcatraz ifconfig ${epair}b 192.0.2.2/24 up
# Trivial ping to the jail, without pf
atf_check -s exit:0 -o ignore ping -c 1 -t 1 192.0.2.2
# pf without policy will let us ping
jexec alcatraz pfctl -e
atf_check -s exit:0 -o ignore ping -c 1 -t 1 192.0.2.2
# Block everything
pft_set_rules alcatraz "block in"
atf_check -s exit:2 -o ignore ping -c 1 -t 1 192.0.2.2
# Block everything but ICMP
pft_set_rules alcatraz "block in" "pass in proto icmp"
atf_check -s exit:0 -o ignore ping -c 1 -t 1 192.0.2.2
}
v4_cleanup()
{
pft_cleanup
}
atf_test_case "v6" "cleanup"
v6_head()
{
atf_set descr 'Basic pass/block test for IPv6'
atf_set require.user root
}
v6_body()
{
pft_init
epair=$(vnet_mkepair)
ifconfig ${epair}a inet6 2001:db8:42::1/64 up no_dad
# Set up a simple jail with one interface
vnet_mkjail alcatraz ${epair}b
jexec alcatraz ifconfig ${epair}b inet6 2001:db8:42::2/64 up no_dad
# Trivial ping to the jail, without pf
atf_check -s exit:0 -o ignore ping -6 -c 1 -W 1 2001:db8:42::2
# pf without policy will let us ping
jexec alcatraz pfctl -e
atf_check -s exit:0 -o ignore ping -6 -c 1 -W 1 2001:db8:42::2
# Block everything
pft_set_rules alcatraz "block in"
atf_check -s exit:2 -o ignore ping -6 -c 1 -W 1 2001:db8:42::2
# Block everything but ICMP
pft_set_rules alcatraz "block in" "pass in proto icmp6"
atf_check -s exit:0 -o ignore ping -6 -c 1 -W 1 2001:db8:42::2
# Allowing ICMPv4 does not allow ICMPv6
pft_set_rules alcatraz "block in" "pass in proto icmp"
atf_check -s exit:2 -o ignore ping -6 -c 1 -W 1 2001:db8:42::2
}
v6_cleanup()
{
pft_cleanup
}
atf_test_case "noalias" "cleanup"
noalias_head()
{
atf_set descr 'Test the :0 noalias option'
atf_set require.user root
}
noalias_body()
{
pft_init
epair=$(vnet_mkepair)
ifconfig ${epair}a inet6 2001:db8:42::1/64 up no_dad
vnet_mkjail alcatraz ${epair}b
jexec alcatraz ifconfig ${epair}b inet6 2001:db8:42::2/64 up no_dad
linklocaladdr=$(jexec alcatraz ifconfig ${epair}b inet6 \
| grep %${epair}b \
| awk '{ print $2; }' \
| cut -d % -f 1)
# Sanity check
atf_check -s exit:0 -o ignore ping -6 -c 3 -W 1 2001:db8:42::2
atf_check -s exit:0 -o ignore ping -6 -c 3 -W 1 ${linklocaladdr}%${epair}a
jexec alcatraz pfctl -e
pft_set_rules alcatraz "block out inet6 from (${epair}b:0) to any"
atf_check -s exit:2 -o ignore ping -6 -c 3 -W 1 2001:db8:42::2
# We should still be able to ping the link-local address
atf_check -s exit:0 -o ignore ping -6 -c 3 -W 1 ${linklocaladdr}%${epair}a
pft_set_rules alcatraz "block out inet6 from (${epair}b) to any"
# We cannot ping to the link-local address
atf_check -s exit:2 -o ignore ping -6 -c 3 -W 1 ${linklocaladdr}%${epair}a
}
noalias_cleanup()
{
pft_cleanup
}
atf_test_case "nested_inline" "cleanup"
nested_inline_head()
{
atf_set descr "Test nested inline anchors, PR196314"
atf_set require.user root
}
nested_inline_body()
{
pft_init
epair=$(vnet_mkepair)
ifconfig ${epair}a inet 192.0.2.1/24 up
vnet_mkjail alcatraz ${epair}b
jexec alcatraz ifconfig ${epair}b 192.0.2.2/24 up
jexec alcatraz pfctl -e
pft_set_rules alcatraz \
"block in" \
"anchor \"an1\" {" \
"pass in quick proto tcp to port time" \
"anchor \"an2\" {" \
"pass in quick proto icmp" \
"}" \
"}"
atf_check -s exit:0 -o ignore ping -c 1 -t 1 192.0.2.2
}
nested_inline_cleanup()
{
pft_cleanup
}
atf_test_case "urpf" "cleanup"
urpf_head()
{
atf_set descr "Test unicast reverse path forwarding check"
atf_set require.user root
atf_set require.progs scapy
}
urpf_body()
{
pft_init
epair_one=$(vnet_mkepair)
epair_two=$(vnet_mkepair)
vnet_mkjail alcatraz ${epair_one}b ${epair_two}b
ifconfig ${epair_one}a 192.0.2.2/24 up
ifconfig ${epair_two}a 198.51.100.2/24 up
jexec alcatraz ifconfig ${epair_one}b 192.0.2.1/24 up
jexec alcatraz ifconfig ${epair_two}b 198.51.100.1/24 up
jexec alcatraz sysctl net.inet.ip.forwarding=1
# Sanity checks
atf_check -s exit:0 -o ignore ping -c 1 -t 1 192.0.2.1
atf_check -s exit:0 -o ignore ping -c 1 -t 1 198.51.100.1
atf_check -s exit:0 ${common_dir}/pft_ping.py \
--sendif ${epair_one}a \
--to 192.0.2.1 \
--fromaddr 198.51.100.2 \
--replyif ${epair_two}a
atf_check -s exit:0 ${common_dir}/pft_ping.py \
--sendif ${epair_two}a \
--to 198.51.100.1 \
--fromaddr 192.0.2.2 \
--replyif ${epair_one}a
pft_set_rules alcatraz \
"block quick from urpf-failed"
jexec alcatraz pfctl -e
# Correct source still works
atf_check -s exit:0 -o ignore ping -c 1 -t 1 192.0.2.1
atf_check -s exit:0 -o ignore ping -c 1 -t 1 198.51.100.1
# Unexpected source interface is blocked
atf_check -s exit:1 ${common_dir}/pft_ping.py \
--sendif ${epair_one}a \
--to 192.0.2.1 \
--fromaddr 198.51.100.2 \
--replyif ${epair_two}a
atf_check -s exit:1 ${common_dir}/pft_ping.py \
--sendif ${epair_two}a \
--to 198.51.100.1 \
--fromaddr 192.0.2.2 \
--replyif ${epair_one}a
}
urpf_cleanup()
{
pft_cleanup
}
atf_init_test_cases()
{
atf_add_test_case "v4"
atf_add_test_case "v6"
atf_add_test_case "noalias"
atf_add_test_case "nested_inline"
atf_add_test_case "urpf"
}