1# 2# SPDX-License-Identifier: BSD-2-Clause 3# 4# Copyright (c) 2023 Rubicon Communications, LLC (Netgate) 5# 6# Redistribution and use in source and binary forms, with or without 7# modification, are permitted provided that the following conditions 8# are met: 9# 1. Redistributions of source code must retain the above copyright 10# notice, this list of conditions and the following disclaimer. 11# 2. Redistributions in binary form must reproduce the above copyright 12# notice, this list of conditions and the following disclaimer in the 13# documentation and/or other materials provided with the distribution. 14# 15# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25# SUCH DAMAGE. 26 27. $(atf_get_srcdir)/utils.subr 28 29common_dir=$(atf_get_srcdir)/../common 30 31atf_test_case "rst" "cleanup" 32rst_head() 33{ 34 atf_set descr 'Check sequence number validation in RST packets' 35 atf_set require.user root 36 atf_set require.progs scapy 37} 38 39rst_body() 40{ 41 pft_init 42 vnet_init_bridge 43 44 epair_srv=$(vnet_mkepair) 45 epair_cl=$(vnet_mkepair) 46 epair_attack=$(vnet_mkepair) 47 48 br=$(vnet_mkbridge) 49 ifconfig ${br} addm ${epair_srv}a 50 ifconfig ${epair_srv}a up 51 ifconfig ${br} addm ${epair_cl}a 52 ifconfig ${epair_cl}a up 53 ifconfig ${br} addm ${epair_attack}a 54 ifconfig ${epair_attack}a up 55 ifconfig ${br} up 56 57 vnet_mkjail srv ${epair_srv}b 58 jexec srv ifconfig ${epair_srv}b 192.0.2.1/24 up 59 jexec srv ifconfig lo0 inet 127.0.0.1/8 up 60 61 vnet_mkjail cl ${epair_cl}b 62 jexec cl ifconfig ${epair_cl}b 192.0.2.2/24 up 63 jexec cl ifconfig lo0 inet 127.0.0.1/8 up 64 65 jexec cl pfctl -e 66 pft_set_rules cl \ 67 "pass keep state" 68 69 # Not required, but pf should log the bad RST packet with this set. 70 jexec cl pfctl -x loud 71 72 vnet_mkjail attack ${epair_attack}b 73 jexec attack ifconfig ${epair_attack}b 192.0.2.3/24 up 74 75 # Sanity check 76 atf_check -s exit:0 -o ignore \ 77 jexec cl ping -c 1 192.0.2.1 78 79 echo "bar" | jexec srv nc -l 1234 & 80 # Allow server time to start 81 sleep 1 82 83 echo "foo" | jexec cl nc -p 4321 192.0.2.1 1234 & 84 # Allow connection time to set up 85 sleep 1 86 87 # Connection should be established now 88 atf_check -s exit:0 -e ignore \ 89 -o match:"ESTABLISHED:ESTABLISHED" \ 90 jexec cl pfctl -ss -v 91 92 # Now insert a fake RST 93 atf_check -s exit:0 -o ignore \ 94 jexec attack ${common_dir}/pft_rst.py 192.0.2.1 1234 192.0.2.2 4321 95 96 # Connection should remain established 97 atf_check -s exit:0 -e ignore \ 98 -o match:"ESTABLISHED:ESTABLISHED" \ 99 jexec cl pfctl -ss -v 100} 101 102rst_cleanup() 103{ 104 pft_cleanup 105} 106 107atf_init_test_cases() 108{ 109 atf_add_test_case "rst" 110} 111