pf tests: Test that dup-to doesn't produce extra duplicate packets
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Kristof Provost
parent
0c458752ce
commit
cd579b6fba
@ -34,6 +34,27 @@
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PAYLOAD_MAGIC = bytes.fromhex('42c0ffee')
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dup_found = 0
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def check_dup(args, packet):
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"""
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Verify that this is an ICMP packet, and that we only see one
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"""
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global dup_found
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icmp = packet.getlayer(sp.ICMP)
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if not icmp:
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return False
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raw = packet.getlayer(sp.Raw)
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if not raw:
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return False
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if raw.load != PAYLOAD_MAGIC:
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return False
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dup_found = dup_found + 1
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return False
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def check_ping_request(args, packet):
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if args.ip6:
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return check_ping6_request(args, packet)
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@ -169,6 +190,8 @@ def main():
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help='The interface through which the packet(s) will be sent')
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parser.add_argument('--recvif', nargs=1,
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help='The interface on which to expect the ICMP echo response')
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parser.add_argument('--checkdup', nargs=1,
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help='The interface on which to expect the duplicated ICMP packets')
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parser.add_argument('--ip6', action='store_true',
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help='Use IPv6')
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parser.add_argument('--to', nargs=1,
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@ -202,6 +225,10 @@ def main():
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sniffer = Sniffer(args, checkfn)
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dupsniffer = None
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if args.checkdup is not None:
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dupsniffer = Sniffer(args, check_dup, recvif=args.checkdup[0])
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if args.tcpsyn:
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tcpsyn(args.sendif[0], args.to[0], args)
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else:
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@ -210,6 +237,11 @@ def main():
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else:
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ping(args.sendif[0], args.to[0], args)
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if dupsniffer:
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dupsniffer.join()
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if dup_found != 1:
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sys.exit(1)
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if sniffer:
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sniffer.join()
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@ -30,11 +30,14 @@
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import scapy.all as sp
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class Sniffer(threading.Thread):
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def __init__(self, args, check_function):
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def __init__(self, args, check_function, recvif=None):
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threading.Thread.__init__(self)
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self._args = args
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self._recvif = args.recvif[0]
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if recvif is not None:
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self._recvif = recvif
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else:
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self._recvif = args.recvif[0]
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self._check_function = check_function
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self.foundCorrectPacket = False
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@ -8,6 +8,7 @@ TESTS_SUBDIRS+= ioctl
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ATF_TESTS_SH+= altq \
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anchor \
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checksum \
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dup \
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forward \
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fragmentation \
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icmp \
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81
tests/sys/netpfil/pf/dup.sh
Normal file
81
tests/sys/netpfil/pf/dup.sh
Normal file
@ -0,0 +1,81 @@
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# $FreeBSD$
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#
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# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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#
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# Copyright (c) 2021 Kristof Provost <kp@FreeBSD.org>
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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. $(atf_get_srcdir)/utils.subr
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common_dir=$(atf_get_srcdir)/../common
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atf_test_case "dup_to" "cleanup"
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do_to_head()
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{
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atf_set descr 'dup-to test'
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atf_set require.user root
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}
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dup_to_body()
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{
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pft_init
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epair_send=$(vnet_mkepair)
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ifconfig ${epair_send}a 192.0.2.1/24 up
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epair_recv=$(vnet_mkepair)
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ifconfig ${epair_recv}a up
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epair_dupto=$(vnet_mkepair)
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ifconfig ${epair_dupto}a up
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vnet_mkjail alcatraz ${epair_send}b ${epair_recv}b ${epair_dupto}b
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jexec alcatraz ifconfig ${epair_send}b 192.0.2.2/24 up
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jexec alcatraz ifconfig ${epair_recv}b 198.51.100.2/24 up
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jexec alcatraz ifconfig ${epair_dupto}b 203.0.113.2/24 up
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jexec alcatraz sysctl net.inet.ip.forwarding=1
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jexec alcatraz arp -s 198.51.100.3 00:01:02:03:04:05
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jexec alcatraz arp -s 203.0.113.3 01:02:03:04:05:06
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route add -net 198.51.100.0/24 192.0.2.2
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jexec alcatraz pfctl -e
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pft_set_rules alcatraz "pass out on { ${epair_recv}b } \
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dup-to (${epair_dupto}b 203.0.113.3)"
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atf_check -s exit:0 ${common_dir}/pft_ping.py \
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--sendif ${epair_send}a \
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--to 198.51.100.3 \
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--recv ${epair_recv}a \
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--checkdup ${epair_dupto}a
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}
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dup_to_cleanup()
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{
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pft_cleanup
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}
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atf_init_test_cases()
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{
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atf_add_test_case "dup_to"
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}
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