git: 4c84c69ba308 - main - pf tests: test that we validate sequence numbers on TCP RST
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Date: Wed, 06 Dec 2023 09:56:29 UTC
The branch main has been updated by kp:
URL: https://cgit.FreeBSD.org/src/commit/?id=4c84c69ba308b7758d07dc8845b13922ed667e02
commit 4c84c69ba308b7758d07dc8845b13922ed667e02
Author: Kristof Provost <kp@FreeBSD.org>
AuthorDate: 2023-11-29 12:51:39 +0000
Commit: Kristof Provost <kp@FreeBSD.org>
CommitDate: 2023-12-05 20:03:49 +0000
pf tests: test that we validate sequence numbers on TCP RST
MFC after: 3 days
Sponsored by: Rubicon Communications, LLC ("Netgate")
---
tests/sys/netpfil/common/Makefile | 2 +
tests/sys/netpfil/common/pft_rst.py | 39 +++++++++++++
tests/sys/netpfil/pf/Makefile | 1 +
tests/sys/netpfil/pf/tcp.sh | 109 ++++++++++++++++++++++++++++++++++++
4 files changed, 151 insertions(+)
diff --git a/tests/sys/netpfil/common/Makefile b/tests/sys/netpfil/common/Makefile
index f51b89d5eab4..0003aac28779 100644
--- a/tests/sys/netpfil/common/Makefile
+++ b/tests/sys/netpfil/common/Makefile
@@ -21,11 +21,13 @@ ${PACKAGE}FILES+= \
runner.subr \
pft_icmp_check.py \
pft_ping.py \
+ pft_rst.py \
pft_synflood.py \
sniffer.py
${PACKAGE}FILESMODE_pft_icmp_check.py= 0555
${PACKAGE}FILESMODE_pft_ping.py= 0555
+${PACKAGE}FILESMODE_pft_rst.py= 0555
${PACKAGE}FILESMODE_pft_synflood.py= 0555
.include <bsd.test.mk>
diff --git a/tests/sys/netpfil/common/pft_rst.py b/tests/sys/netpfil/common/pft_rst.py
new file mode 100644
index 000000000000..28d951e8a047
--- /dev/null
+++ b/tests/sys/netpfil/common/pft_rst.py
@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+#
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# Copyright (c) 2023 Rubicon Communications, LLC (Netgate)
+#
+# 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.
+#
+
+import logging
+logging.getLogger("scapy").setLevel(logging.CRITICAL)
+import math
+import scapy.all as sp
+import sys
+
+def send_rst(src_ip, src_port, dst_ip, dst_port):
+ sp.send(sp.IP(src=src_ip, dst=dst_ip) /
+ sp.TCP(sport=src_port, dport=dst_port, seq=1, flags="R"))
+
+send_rst(sys.argv[1], int(sys.argv[2]), sys.argv[3], int(sys.argv[4]))
diff --git a/tests/sys/netpfil/pf/Makefile b/tests/sys/netpfil/pf/Makefile
index 9337b95baf4e..1083f89a5502 100644
--- a/tests/sys/netpfil/pf/Makefile
+++ b/tests/sys/netpfil/pf/Makefile
@@ -40,6 +40,7 @@ ATF_TESTS_SH+= altq \
syncookie \
synproxy \
table \
+ tcp \
tos
ATF_TESTS_PYTEST+= frag6.py
diff --git a/tests/sys/netpfil/pf/tcp.sh b/tests/sys/netpfil/pf/tcp.sh
new file mode 100644
index 000000000000..84536480b44e
--- /dev/null
+++ b/tests/sys/netpfil/pf/tcp.sh
@@ -0,0 +1,109 @@
+#
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# Copyright (c) 2023 Rubicon Communications, LLC (Netgate)
+#
+# 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 "rst" "cleanup"
+rst_head()
+{
+ atf_set descr 'Check sequence number validation in RST packets'
+ atf_set require.user root
+ atf_set require.progs scapy
+}
+
+rst_body()
+{
+ pft_init
+
+ epair_srv=$(vnet_mkepair)
+ epair_cl=$(vnet_mkepair)
+ epair_attack=$(vnet_mkepair)
+
+ br=$(vnet_mkbridge)
+ ifconfig ${br} addm ${epair_srv}a
+ ifconfig ${epair_srv}a up
+ ifconfig ${br} addm ${epair_cl}a
+ ifconfig ${epair_cl}a up
+ ifconfig ${br} addm ${epair_attack}a
+ ifconfig ${epair_attack}a up
+ ifconfig ${br} up
+
+ vnet_mkjail srv ${epair_srv}b
+ jexec srv ifconfig ${epair_srv}b 192.0.2.1/24 up
+ jexec srv ifconfig lo0 inet 127.0.0.1/8 up
+
+ vnet_mkjail cl ${epair_cl}b
+ jexec cl ifconfig ${epair_cl}b 192.0.2.2/24 up
+ jexec cl ifconfig lo0 inet 127.0.0.1/8 up
+
+ jexec cl pfctl -e
+ pft_set_rules cl \
+ "pass keep state"
+
+ # Not required, but pf should log the bad RST packet with this set.
+ jexec cl pfctl -x loud
+
+ vnet_mkjail attack ${epair_attack}b
+ jexec attack ifconfig ${epair_attack}b 192.0.2.3/24 up
+
+ # Sanity check
+ atf_check -s exit:0 -o ignore \
+ jexec cl ping -c 1 192.0.2.1
+
+ echo "bar" | jexec srv nc -l 1234 &
+ # Allow server time to start
+ sleep 1
+
+ echo "foo" | jexec cl nc -p 4321 192.0.2.1 1234 &
+ # Allow connection time to set up
+ sleep 1
+
+ # Connection should be established now
+ atf_check -s exit:0 -e ignore \
+ -o match:"ESTABLISHED:ESTABLISHED" \
+ jexec cl pfctl -ss -v
+
+ # Now insert a fake RST
+ atf_check -s exit:0 -o ignore \
+ jexec attack ${common_dir}/pft_rst.py 192.0.2.1 1234 192.0.2.2 4321
+
+ # Connection should remain established
+ atf_check -s exit:0 -e ignore \
+ -o match:"ESTABLISHED:ESTABLISHED" \
+ jexec cl pfctl -ss -v
+}
+
+rst_cleanup()
+{
+ pft_cleanup
+}
+
+atf_init_test_cases()
+{
+ atf_add_test_case "rst"
+}