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pf: Add a TCP rdr test on IPv6
Reviewed by: kp Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D42105
This commit is contained in:
Tom Jones
parent
161984ade1
commit
b9870ba93e
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@ -29,6 +29,7 @@ ATF_TESTS_SH+= altq \
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pfsync \
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prio \
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proxy \
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rdr \
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ridentifier \
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route_to \
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rtable \
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127
tests/sys/netpfil/pf/rdr.sh
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127
tests/sys/netpfil/pf/rdr.sh
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@ -0,0 +1,127 @@
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#
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#
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# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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#
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# Copyright © 2023 Tom Jones <thj@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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. $(atf_get_srcdir)/utils.subr
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atf_test_case "tcp_v6" "cleanup"
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tcp_v6_head()
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{
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atf_set descr 'TCP rdr with IPv6'
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atf_set require.user root
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atf_set require.progs scapy python3
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}
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#
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# Test that rdr works for TCP with IPv6.
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#
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# a <-----> b <-----> c
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#
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# Test configures three jails (a, b and c) and connects them together with b as
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# a router between a and c.
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#
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# TCP traffic to b on port 80 is redirected to c on port 8000
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#
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# Test for incorrect checksums after the rewrite by looking at a packet capture (see bug 210860)
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#
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tcp_v6_body()
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{
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pft_init
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j="rdr:tcp_v6"
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epair_one=$(vnet_mkepair)
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epair_two=$(vnet_mkepair)
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echo $epair_one
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echo $epair_two
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vnet_mkjail ${j}a ${epair_one}b
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vnet_mkjail ${j}b ${epair_one}a ${epair_two}a
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vnet_mkjail ${j}c ${epair_two}b
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# configure addresses for b
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jexec ${j}b ifconfig lo0 up
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jexec ${j}b ifconfig ${epair_one}a inet6 2001:db8:a::1/64 up no_dad
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jexec ${j}b ifconfig ${epair_two}a inet6 2001:db8:b::1/64 up no_dad
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# configure addresses for a
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jexec ${j}a ifconfig lo0 up
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jexec ${j}a ifconfig ${epair_one}b inet6 2001:db8:a::2/64 up no_dad
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# configure addresses for c
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jexec ${j}c ifconfig lo0 up
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jexec ${j}c ifconfig ${epair_two}b inet6 2001:db8:b::2/64 up no_dad
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# enable forwarding in the b jail
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jexec ${j}b sysctl net.inet6.ip6.forwarding=1
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# add routes so a and c can find each other
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jexec ${j}a route add -inet6 2001:db8:b::0/64 2001:db8:a::1
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jexec ${j}c route add -inet6 2001:db8:a::0/64 2001:db8:b::1
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jexec ${j}b pfctl -e
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pft_set_rules ${j}b \
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"rdr on ${epair_one}a proto tcp from any to any port 80 -> 2001:db8:b::2 port 8000"
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# Check that a can reach c over the router
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atf_check -s exit:0 -o ignore \
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jexec ${j}a ping -6 -c 1 2001:db8:b::2
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# capture packets on c so we can look for incorrect checksums
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jexec ${j}c tcpdump --immediate-mode -w ${j}.pcap tcp and port 8000 &
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tcpdumppid=$!
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# start a web server and give it a second to start
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jexec ${j}c python3 -m http.server &
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sleep 1
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# http directly from a to c -> a ---> b
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atf_check -s exit:0 -o ignore \
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jexec ${j}a fetch -T 1 -o /dev/null -q "http://[2001:db8:b::2]:8000"
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# http from a to b with a redirect -> a ---> b
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atf_check -s exit:0 -o ignore \
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jexec ${j}a fetch -T 1 -o /dev/null -q "http://[2001:db8:a::1]:80"
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# ask tcpdump to stop so we can check the packet capture
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jexec ${j}c kill -s SIGINT $tcpdumppid
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# Check for 'incorrect' in packet capture, this should tell us if
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# checksums are bad with rdr rules
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count=$(jexec ${j}c tcpdump -vvvv -r ${j}.pcap | grep incorrect | wc -l)
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atf_check_equal " 0" "$count"
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}
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tcp_v6_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 "tcp_v6"
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}
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