1 files changed, 76 insertions, 0 deletions
diff --git a/tests/sys/netpfil/pf/nat44.py b/tests/sys/netpfil/pf/nat44.py
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index 000000000000..d69e794a62c3
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+++ b/tests/sys/netpfil/pf/nat44.py
@@ -0,0 +1,76 @@
+#
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# Copyright (c) 2025 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 TestNAT44(VnetTestTemplate):
+    REQUIRED_MODULES = [ "pf" ]
+    TOPOLOGY = {
+        "vnet1": {"ifaces": ["if1"]},
+        "vnet2": {"ifaces": ["if1", "if2"]},
+        "vnet3": {"ifaces": ["if2"]},
+        "if1": {"prefixes4": [("192.0.2.2/24", "192.0.2.1/24")]},
+        "if2": {"prefixes4": [("198.51.100.1/24", "198.51.100.2")]},
+    }
+
+    def vnet2_handler(self, vnet):
+        outifname = vnet.iface_alias_map["if2"].name
+        ToolsHelper.print_output("/sbin/sysctl net.inet.ip.forwarding=1")
+
+        ToolsHelper.print_output("/sbin/pfctl -e")
+        ToolsHelper.print_output("/sbin/pfctl -x loud")
+        ToolsHelper.pf_rules([
+            "set reassemble yes",
+            "nat on {} inet from 192.0.2.0/24 -> ({})".format(outifname, outifname),
+            "pass"])
+
+    def vnet3_handler(self, vnet):
+        pass
+
+    @pytest.mark.require_user("root")
+    @pytest.mark.require_progs(["scapy"])
+    def test_nat_igmp(self):
+        "Verify that NAT translation of !(TCP|UDP|SCTP|ICMP) doesn't panic"
+        ToolsHelper.print_output("/sbin/route add default 192.0.2.1")
+        ToolsHelper.print_output("ping -c 3 198.51.100.2")
+
+        # Import in the correct vnet, so at to not confuse Scapy
+        import scapy.all as sp
+        import scapy.contrib as sc
+        import scapy.contrib.igmp
+
+        pkt = sp.IP(dst="198.51.100.2", ttl=64) \
+            / sc.igmp.IGMP(type=0x11, mrcode=1)
+        sp.send(pkt)
+
+        # This time we'll hit an existing state
+        pkt = sp.IP(dst="198.51.100.2", ttl=64) \
+            / sc.igmp.IGMP(type=0x11, mrcode=1)
+        reply = sp.sr1(pkt, timeout=3)
+        if reply:
+            reply.show()