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authorKristof Provost <kp@FreeBSD.org>2024-11-08 14:45:57 +0000
committerKristof Provost <kp@FreeBSD.org>2024-12-17 10:07:15 +0000
commita4e0403295254fd72e8e867aceb03805fa7957af (patch)
tree1b80aeab3cb251cb9704e0af8b22574ead1a5a15
parent86bcaedd35f4cd4272b09ef05db19b01f0000d1f (diff)
pf tests: verify that TCP RST makes it through NAT64
Sponsored by: Rubicon Communications, LLC ("Netgate") Differential Revision: https://reviews.freebsd.org/D47796
-rw-r--r--tests/sys/netpfil/pf/Makefile1
-rw-r--r--tests/sys/netpfil/pf/nat64.py84
2 files changed, 85 insertions, 0 deletions
diff --git a/tests/sys/netpfil/pf/Makefile b/tests/sys/netpfil/pf/Makefile
index ec36e93dc634..2edd8e7d2026 100644
--- a/tests/sys/netpfil/pf/Makefile
+++ b/tests/sys/netpfil/pf/Makefile
@@ -55,6 +55,7 @@ ATF_TESTS_SH+= altq \
ATF_TESTS_PYTEST+= frag6.py
ATF_TESTS_PYTEST+= icmp.py
+ATF_TESTS_PYTEST+= nat64.py
ATF_TESTS_PYTEST+= nat66.py
ATF_TESTS_PYTEST+= sctp.py
diff --git a/tests/sys/netpfil/pf/nat64.py b/tests/sys/netpfil/pf/nat64.py
new file mode 100644
index 000000000000..0053a2401872
--- /dev/null
+++ b/tests/sys/netpfil/pf/nat64.py
@@ -0,0 +1,84 @@
+#
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# Copyright (c) 2024 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 pytest
+from atf_python.sys.net.tools import ToolsHelper
+from atf_python.sys.net.vnet import VnetTestTemplate
+
+class TestNAT64(VnetTestTemplate):
+ REQUIRED_MODULES = [ "pf" ]
+ TOPOLOGY = {
+ "vnet1": {"ifaces": ["if1"]},
+ "vnet2": {"ifaces": ["if1", "if2"]},
+ "vnet3": {"ifaces": ["if2"]},
+ "if1": {"prefixes6": [("2001:db8::2/64", "2001:db8::1/64")]},
+ "if2": {"prefixes4": [("192.0.2.1/24", "192.0.2.2/24")]},
+ }
+
+ def vnet3_handler(self, vnet):
+ ToolsHelper.print_output("echo foo | nc -l 1234")
+
+ def vnet2_handler(self, vnet):
+ ifname = vnet.iface_alias_map["if1"].name
+
+ ToolsHelper.print_output("/sbin/pfctl -e")
+ ToolsHelper.pf_rules([
+ "pass inet6 proto icmp6",
+ "pass in on %s inet6 af-to inet from 192.0.2.1" % ifname])
+
+ @pytest.mark.require_user("root")
+ def test_tcp_rst(self):
+ ToolsHelper.print_output("/sbin/route -6 add default 2001:db8::1")
+
+ import scapy.all as sp
+
+ # Send a SYN
+ packet = sp.IPv6(dst="64:ff9b::192.0.2.2") \
+ / sp.TCP(dport=1222, flags="S")
+
+ # Get a reply
+ reply = sp.sr1(packet)
+
+ # We expect to get a RST here.
+ tcp = reply.getlayer(sp.TCP)
+ assert tcp
+ assert "R" in tcp.flags
+
+ # Now try to SYN to an open port
+ packet = sp.IPv6(dst="64:ff9b::192.0.2.2") \
+ / sp.TCP(dport=1234, flags="S")
+ reply = sp.sr1(packet)
+
+ tcp = reply.getlayer(sp.TCP)
+ assert tcp
+
+ # We don't get RST
+ assert "R" not in tcp.flags
+
+ # We do get SYN|ACK
+ assert "S" in tcp.flags
+ assert "A" in tcp.flags
+