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Diffstat (limited to 'tests/sys/netpfil/pf/igmp.py')
| -rw-r--r-- | tests/sys/netpfil/pf/igmp.py | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/tests/sys/netpfil/pf/igmp.py b/tests/sys/netpfil/pf/igmp.py new file mode 100644 index 000000000000..b339a2825082 --- /dev/null +++ b/tests/sys/netpfil/pf/igmp.py @@ -0,0 +1,95 @@ +# +# 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 utils import DelayedSend +from atf_python.sys.net.tools import ToolsHelper +from atf_python.sys.net.vnet import VnetTestTemplate + +class TestIGMP(VnetTestTemplate): + REQUIRED_MODULES = [ "pf" ] + TOPOLOGY = { + "vnet1": {"ifaces": ["if1"]}, + "vnet2": {"ifaces": ["if1"]}, + "if1": {"prefixes4": [("192.0.2.2/24", "192.0.2.1/24")]}, + } + + def vnet2_handler(self, vnet): + ifname = vnet.iface_alias_map["if1"].name + ToolsHelper.print_output("/sbin/pfctl -e") + ToolsHelper.pf_rules([ + "pass", + ]) + ToolsHelper.print_output("/sbin/pfctl -x loud") + ToolsHelper.print_output("echo \"j 230.0.0.1 %s\ns 3600\nq\" | /usr/sbin/mtest" % ifname) + + def find_igmp_reply(self, pkt, ifname): + pkt.show() + s = DelayedSend(pkt) + + found = False + packets = self.sp.sniff(iface=ifname, timeout=5) + for r in packets: + r.show() + igmp = r.getlayer(self.sc.igmp.IGMP) + if not igmp: + continue + igmp.show() + if not igmp.gaddr == "230.0.0.1": + continue + found = True + return found + + @pytest.mark.require_user("root") + @pytest.mark.require_progs(["scapy"]) + def test_ip_opts(self): + """Verify that we allow IGMP packets with IP options""" + ifname = self.vnet.iface_alias_map["if1"].name + + # 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 + self.sp = sp + self.sc = sc + + # We allow IGMP packets with the router alert option + pkt = sp.IP(dst="224.0.0.1%%%s" % ifname, ttl=1, + options=[sp.IPOption_Router_Alert()]) \ + / sc.igmp.IGMP(type=0x11, mrcode=1) + assert self.find_igmp_reply(pkt, ifname) + + # But not with other options + pkt = sp.IP(dst="224.0.0.1%%%s" % ifname, ttl=1, + options=[sp.IPOption_NOP()]) \ + / sc.igmp.IGMP(type=0x11, mrcode=1) + assert not self.find_igmp_reply(pkt, ifname) + + # Or with the wrong TTL + pkt = sp.IP(dst="224.0.0.1%%%s" % ifname, ttl=2, + options=[sp.IPOption_Router_Alert()]) \ + / sc.igmp.IGMP(type=0x11, mrcode=1) + assert not self.find_igmp_reply(pkt, ifname) |