pf tests: test that we validate sequence numbers on TCP RST
MFC after: 3 days Sponsored by: Rubicon Communications, LLC ("Netgate")
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@ -21,11 +21,13 @@ ${PACKAGE}FILES+= \
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runner.subr \
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pft_icmp_check.py \
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pft_ping.py \
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pft_rst.py \
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pft_synflood.py \
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sniffer.py
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${PACKAGE}FILESMODE_pft_icmp_check.py= 0555
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${PACKAGE}FILESMODE_pft_ping.py= 0555
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${PACKAGE}FILESMODE_pft_rst.py= 0555
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${PACKAGE}FILESMODE_pft_synflood.py= 0555
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.include <bsd.test.mk>
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@ -0,0 +1,39 @@
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#!/usr/bin/env python3
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#
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# SPDX-License-Identifier: BSD-2-Clause
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#
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# Copyright (c) 2023 Rubicon Communications, LLC (Netgate)
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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import logging
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logging.getLogger("scapy").setLevel(logging.CRITICAL)
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import math
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import scapy.all as sp
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import sys
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def send_rst(src_ip, src_port, dst_ip, dst_port):
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sp.send(sp.IP(src=src_ip, dst=dst_ip) /
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sp.TCP(sport=src_port, dport=dst_port, seq=1, flags="R"))
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send_rst(sys.argv[1], int(sys.argv[2]), sys.argv[3], int(sys.argv[4]))
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@ -40,6 +40,7 @@ ATF_TESTS_SH+= altq \
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syncookie \
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synproxy \
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table \
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tcp \
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tos
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ATF_TESTS_PYTEST+= frag6.py
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@ -0,0 +1,109 @@
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#
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# SPDX-License-Identifier: BSD-2-Clause
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#
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# Copyright (c) 2023 Rubicon Communications, LLC (Netgate)
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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. $(atf_get_srcdir)/utils.subr
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common_dir=$(atf_get_srcdir)/../common
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atf_test_case "rst" "cleanup"
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rst_head()
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{
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atf_set descr 'Check sequence number validation in RST packets'
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atf_set require.user root
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atf_set require.progs scapy
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}
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rst_body()
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{
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pft_init
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epair_srv=$(vnet_mkepair)
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epair_cl=$(vnet_mkepair)
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epair_attack=$(vnet_mkepair)
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br=$(vnet_mkbridge)
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ifconfig ${br} addm ${epair_srv}a
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ifconfig ${epair_srv}a up
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ifconfig ${br} addm ${epair_cl}a
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ifconfig ${epair_cl}a up
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ifconfig ${br} addm ${epair_attack}a
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ifconfig ${epair_attack}a up
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ifconfig ${br} up
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vnet_mkjail srv ${epair_srv}b
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jexec srv ifconfig ${epair_srv}b 192.0.2.1/24 up
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jexec srv ifconfig lo0 inet 127.0.0.1/8 up
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vnet_mkjail cl ${epair_cl}b
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jexec cl ifconfig ${epair_cl}b 192.0.2.2/24 up
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jexec cl ifconfig lo0 inet 127.0.0.1/8 up
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jexec cl pfctl -e
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pft_set_rules cl \
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"pass keep state"
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# Not required, but pf should log the bad RST packet with this set.
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jexec cl pfctl -x loud
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vnet_mkjail attack ${epair_attack}b
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jexec attack ifconfig ${epair_attack}b 192.0.2.3/24 up
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# Sanity check
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atf_check -s exit:0 -o ignore \
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jexec cl ping -c 1 192.0.2.1
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echo "bar" | jexec srv nc -l 1234 &
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# Allow server time to start
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sleep 1
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echo "foo" | jexec cl nc -p 4321 192.0.2.1 1234 &
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# Allow connection time to set up
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sleep 1
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# Connection should be established now
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atf_check -s exit:0 -e ignore \
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-o match:"ESTABLISHED:ESTABLISHED" \
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jexec cl pfctl -ss -v
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# Now insert a fake RST
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atf_check -s exit:0 -o ignore \
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jexec attack ${common_dir}/pft_rst.py 192.0.2.1 1234 192.0.2.2 4321
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# Connection should remain established
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atf_check -s exit:0 -e ignore \
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-o match:"ESTABLISHED:ESTABLISHED" \
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jexec cl pfctl -ss -v
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}
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rst_cleanup()
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{
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pft_cleanup
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}
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atf_init_test_cases()
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{
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atf_add_test_case "rst"
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}
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