CoCalc -- divert-to.sh

GitHub Repository: freebsd/freebsd-src
Path: blob/main/tests/sys/netpfil/pf/divert-to.sh
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#
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# SPDX-License-Identifier: BSD-2-Clause
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#
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# Copyright (c) 2023 Igor Ostapenko <[email protected]>
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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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#
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# pf divert-to action test cases
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#
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#  -----------|           |--     |----|     ----|            |-----------
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# ( ) inbound |pf_check_in|  ) -> |host| -> ( )  |pf_check_out| outbound  )
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#  -----------|     |     |--     |----|     ----|     |      |-----------
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#                   |                                  |
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#                  \|/                                \|/
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#                |------|                           |------|
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#                |divapp|                           |divapp|
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#                |------|                           |------|
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#
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# The basic cases:
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#   - inbound > diverted               | divapp terminated
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#   - inbound > diverted > inbound     | host terminated
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#   - inbound > diverted > outbound    | network terminated
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#   - outbound > diverted              | divapp terminated
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#   - outbound > diverted > outbound   | network terminated
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#   - outbound > diverted > inbound    | e.g. host terminated
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#
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# When a packet is diverted, forwarded, and possibly diverted again:
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#   - inbound > diverted > inbound > forwarded
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#         > outbound                       | network terminated
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#   - inbound > diverted > inbound > forwarded
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#         > outbound > diverted > outbound | network terminated
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#
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# Test case naming legend:
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# in - inbound
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# div - diverted
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# out - outbound
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# fwd - forwarded
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# dn - delayed by dummynet
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#
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. $(atf_get_srcdir)/utils.subr
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atf_test_case "in_div" "cleanup"
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in_div_head()
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{
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	atf_set descr 'Test inbound > diverted | divapp terminated'
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	atf_set require.user root
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	atf_set require.kmods ipdivert
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}
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in_div_body()
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{
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	pft_init
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	epair=$(vnet_mkepair)
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	vnet_mkjail div ${epair}b
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	atf_check ifconfig ${epair}a 192.0.2.1/24 up
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	atf_check ifconfig ${epair}a inet6 2001:db8::1/64 no_dad
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	atf_check jexec div ifconfig ${epair}b 192.0.2.2/24 up
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	atf_check jexec div ifconfig ${epair}b inet6 2001:db8::2/64 no_dad
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	# Sanity check
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	atf_check -o ignore ping -c3 192.0.2.2
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	atf_check -o ignore ping -c3 2001:db8::2
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	jexec div pfctl -e
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	pft_set_rules div \
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	    "pass all" \
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	    "pass in inet proto icmp icmp-type echoreq divert-to 127.0.0.1 port 2000" \
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	    "pass in inet6 proto icmp6 icmp6-type echoreq divert-to ::1 port 2000"
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	jexec div $(atf_get_srcdir)/../common/divapp 2000 &
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	divapp_pid=$!
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	# Wait for the divapp to be ready
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	sleep 1
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	# divapp is expected to "eat" the packet
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	atf_check -s not-exit:0 -o ignore ping -c1 -t1 192.0.2.2
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	wait $divapp_pid
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	jexec div $(atf_get_srcdir)/../common/divapp 2000 &
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	divapp_pid=$!
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	# Wait for the divapp to be ready
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	sleep 1
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	# divapp is expected to "eat" the packet
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	atf_check -s not-exit:0 -o ignore ping -c1 -t1 2001:db8::2
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	wait $divapp_pid
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}
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in_div_cleanup()
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{
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	pft_cleanup
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}
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atf_test_case "in_div_in" "cleanup"
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in_div_in_head()
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{
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	atf_set descr 'Test inbound > diverted > inbound | host terminated'
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	atf_set require.user root
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	atf_set require.kmods ipdivert
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}
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in_div_in_body()
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{
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	pft_init
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	epair=$(vnet_mkepair)
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	vnet_mkjail div ${epair}b
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	atf_check ifconfig ${epair}a 192.0.2.1/24 up
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	atf_check ifconfig ${epair}a inet6 2001:db8::1/64 no_dad
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	atf_check jexec div ifconfig ${epair}b 192.0.2.2/24 up
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	atf_check jexec div ifconfig ${epair}b inet6 2001:db8::2/64 no_dad
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	# Sanity check
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	atf_check -o ignore ping -c3 192.0.2.2
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	atf_check -o ignore ping -c3 2001:db8::2
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	jexec div pfctl -e
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	pft_set_rules div \
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	    "pass all" \
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	    "pass in inet proto icmp icmp-type echoreq divert-to 127.0.0.1 port 2000 no state" \
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	    "pass in inet6 proto icmp6 icmp6-type echoreq divert-to ::1 port 2000 no state"
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	jexec div $(atf_get_srcdir)/../common/divapp 2000 divert-back &
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	divapp_pid=$!
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	# Wait for the divapp to be ready
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	sleep 1
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	# divapp is NOT expected to "eat" the packet
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	atf_check -s exit:0 -o ignore ping -c1 192.0.2.2
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	wait $divapp_pid
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	jexec div $(atf_get_srcdir)/../common/divapp 2000 divert-back &
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	divapp_pid=$!
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	# Wait for the divapp to be ready
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	sleep 1
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	# divapp is expected to "eat" the packet
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	atf_check -s exit:0 -o ignore ping -c1 -t1 2001:db8::2
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	wait $divapp_pid
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}
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in_div_in_cleanup()
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{
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	pft_cleanup
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}
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atf_test_case "out_div" "cleanup"
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out_div_head()
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{
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	atf_set descr 'Test outbound > diverted | divapp terminated'
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	atf_set require.user root
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	atf_set require.kmods ipdivert
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}
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out_div_body()
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{
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	pft_init
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	epair=$(vnet_mkepair)
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	vnet_mkjail div ${epair}b
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	atf_check ifconfig ${epair}a 192.0.2.1/24 up
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	atf_check ifconfig ${epair}a inet6 2001:db8::1/64 no_dad
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	atf_check jexec div ifconfig ${epair}b 192.0.2.2/24 up
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	atf_check jexec div ifconfig ${epair}b inet6 2001:db8::2/64 no_dad
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	# Sanity check
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	atf_check -o ignore ping -c3 192.0.2.2
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	atf_check -o ignore ping -c3 2001:db8::2
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	jexec div pfctl -e
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	pft_set_rules div \
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	    "pass all" \
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	    "pass in inet proto icmp icmp-type echoreq no state" \
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	    "pass out inet proto icmp icmp-type echorep divert-to 127.0.0.1 port 2000 no state" \
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	    "pass in inet6 proto icmp6 icmp6-type echoreq no state" \
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	    "pass out inet6 proto icmp6 icmp6-type echorep divert-to ::1 port 2000 no state"
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	jexec div $(atf_get_srcdir)/../common/divapp 2000 &
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	divapp_pid=$!
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	# Wait for the divapp to be ready
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	sleep 1
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	# divapp is expected to "eat" the packet
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	atf_check -s not-exit:0 -o ignore ping -c1 -t1 192.0.2.2
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	wait $divapp_pid
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	jexec div $(atf_get_srcdir)/../common/divapp 2000 &
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	divapp_pid=$!
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	# Wait for the divapp to be ready
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	sleep 1
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	# divapp is expected to "eat" the packet
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	atf_check -s not-exit:0 -o ignore ping -c1 -t1 2001:db8::2
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	wait $divapp_pid
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}
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out_div_cleanup()
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{
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	pft_cleanup
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}
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atf_test_case "out_div_out" "cleanup"
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out_div_out_head()
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{
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	atf_set descr 'Test outbound > diverted > outbound | network terminated'
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	atf_set require.user root
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	atf_set require.kmods ipdivert
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}
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out_div_out_body()
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{
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	pft_init
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	epair=$(vnet_mkepair)
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	vnet_mkjail div ${epair}b
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	atf_check ifconfig ${epair}a 192.0.2.1/24 up
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	atf_check ifconfig ${epair}a inet6 2001:db8::1/64 no_dad
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	atf_check jexec div ifconfig ${epair}b 192.0.2.2/24 up
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	atf_check jexec div ifconfig ${epair}b inet6 2001:db8::2/64 no_dad
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	# Sanity check
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	atf_check -o ignore ping -c3 192.0.2.2
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	atf_check -o ignore ping -c3 2001:db8::2
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	jexec div pfctl -e
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	pft_set_rules div \
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	    "pass all" \
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	    "pass in inet proto icmp icmp-type echoreq no state" \
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	    "pass out inet proto icmp icmp-type echorep divert-to 127.0.0.1 port 2000 no state" \
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	    "pass in inet6 proto icmp6 icmp6-type echoreq no state" \
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	    "pass out inet6 proto icmp6 icmp6-type echorep divert-to ::1 port 2000 no state"
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	jexec div $(atf_get_srcdir)/../common/divapp 2000 divert-back &
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	divapp_pid=$!
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	# Wait for the divapp to be ready
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	sleep 1
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	# divapp is NOT expected to "eat" the packet
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	atf_check -s exit:0 -o ignore ping -c1 192.0.2.2
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	wait $divapp_pid
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	jexec div $(atf_get_srcdir)/../common/divapp 2000 divert-back &
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	divapp_pid=$!
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	# Wait for the divapp to be ready
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	sleep 1
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	# divapp is NOT expected to "eat" the packet
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	atf_check -s exit:0 -o ignore ping -c1 2001:db8::2
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	wait $divapp_pid
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}
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out_div_out_cleanup()
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{
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	pft_cleanup
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}
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atf_test_case "in_div_in_fwd_out_div_out" "cleanup"
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in_div_in_fwd_out_div_out_head()
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{
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	atf_set descr 'Test inbound > diverted > inbound > forwarded > outbound > diverted > outbound | network terminated'
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	atf_set require.user root
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	atf_set require.kmods ipdivert
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}
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in_div_in_fwd_out_div_out_body()
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{
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	pft_init
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	# host <a--epair0--b> router <a--epair1--b> site
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	epair0=$(vnet_mkepair)
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	epair1=$(vnet_mkepair)
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	vnet_mkjail router ${epair0}b ${epair1}a
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	atf_check ifconfig ${epair0}a 192.0.2.1/24 up
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	atf_check ifconfig ${epair0}a inet6 2001:db8::1/64 no_dad
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	atf_check -o ignore jexec router sysctl net.inet.ip.forwarding=1
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	atf_check -o ignore jexec router sysctl net.inet6.ip6.forwarding=1
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	atf_check jexec router ifconfig ${epair0}b 192.0.2.2/24 up
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	atf_check jexec router ifconfig ${epair0}b inet6 2001:db8::2/64 no_dad
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	atf_check jexec router ifconfig ${epair1}a 198.51.100.1/24 up
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	atf_check jexec router ifconfig ${epair1}a inet6 2001:db9::1/64 no_dad
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	vnet_mkjail site ${epair1}b
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	jexec site ifconfig ${epair1}b 198.51.100.2/24 up
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	jexec site ifconfig ${epair1}b inet6 2001:db9::2/64 no_dad
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	jexec site route add default 198.51.100.1
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	jexec site route -6 add default 2001:db9::1
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	atf_check -o ignore route add -net 198.51.100.0/24 192.0.2.2
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	atf_check -o ignore route -6 add -net 2001:db9::/64 2001:db8::2
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	# Sanity check
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	atf_check -o ignore ping -c3 192.0.2.2
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	atf_check -o ignore ping -c3 2001:db8::2
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	# Should be routed without pf
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	atf_check -o ignore ping -c3 198.51.100.2
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	atf_check -o ignore ping -c3 2001:db9::2
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	jexec router pfctl -e
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	pft_set_rules router \
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	    "pass all" \
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	    "pass in inet proto icmp icmp-type echoreq divert-to 127.0.0.1 port 2001 no state" \
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	    "pass out inet proto icmp icmp-type echoreq divert-to 127.0.0.1 port 2002 no state" \
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	    "pass in inet6 proto icmp6 icmp6-type echoreq divert-to ::1 port 2001 no state" \
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	    "pass out inet6 proto icmp6 icmp6-type echoreq divert-to ::1 port 2002 no state"
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	jexec router $(atf_get_srcdir)/../common/divapp 2001 divert-back &
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	indivapp_pid=$!
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	jexec router $(atf_get_srcdir)/../common/divapp 2002 divert-back &
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	outdivapp_pid=$!
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	# Wait for the divapps to be ready
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	sleep 1
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	# Both divapps are NOT expected to "eat" the packet
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	atf_check -s exit:0 -o ignore ping -c1 198.51.100.2
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	wait $indivapp_pid && wait $outdivapp_pid
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	jexec router $(atf_get_srcdir)/../common/divapp 2001 divert-back &
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	indivapp_pid=$!
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	jexec router $(atf_get_srcdir)/../common/divapp 2002 divert-back &
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	outdivapp_pid=$!
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	# Wait for the divapps to be ready
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	sleep 1
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	# Both divapps are NOT expected to "eat" the packet
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	atf_check -o ignore ping -c1 2001:db9::2
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	wait $indivapp_pid && wait $outdivapp_pid
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}
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in_div_in_fwd_out_div_out_cleanup()
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{
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	pft_cleanup
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}
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atf_test_case "in_dn_in_div_in_out_div_out_dn_out" "cleanup"
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in_dn_in_div_in_out_div_out_dn_out_head()
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{
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	atf_set descr 'Test inbound > delayed+diverted > outbound > diverted+delayed > outbound | network terminated'
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	atf_set require.user root
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	atf_set require.kmods dummynet ipdivert
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}
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in_dn_in_div_in_out_div_out_dn_out_body()
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{
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	pft_init
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369
	epair=$(vnet_mkepair)
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	vnet_mkjail alcatraz ${epair}b
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	atf_check ifconfig ${epair}a 192.0.2.1/24 up
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	atf_check ifconfig ${epair}a inet6 2001:db8::1/64 no_dad
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	atf_check ifconfig ${epair}a ether 02:00:00:00:00:01
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	atf_check jexec alcatraz ifconfig ${epair}b 192.0.2.2/24 up
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	atf_check jexec alcatraz ifconfig ${epair}b inet6 2001:db8::2/64 no_dad
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	# Sanity check
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	atf_check -o ignore ping -c3 192.0.2.2
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	atf_check -o ignore ping -c3 2001:db8::2
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381
	# a) ping should time out due to very narrow dummynet pipes {
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	jexec alcatraz dnctl pipe 1001 config bw 1Byte/s
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	jexec alcatraz dnctl pipe 1002 config bw 1Byte/s
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	jexec alcatraz pfctl -e
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	pft_set_rules alcatraz \
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	    "ether pass in from 02:00:00:00:00:01 l3 all dnpipe 1001" \
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	    "ether pass out to 02:00:00:00:00:01 l3 all dnpipe 1002 " \
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	    "pass all" \
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	    "pass in inet proto icmp icmp-type echoreq divert-to 127.0.0.1 port 1001 no state" \
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	    "pass out inet proto icmp icmp-type echorep divert-to 127.0.0.1 port 1002 no state" \
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	    "pass in inet6 proto icmp6 icmp6-type echoreq divert-to ::1 port 1001 no state" \
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	    "pass out inet6 proto icmp6 icmp6-type echorep divert-to ::1 port 1002 no state"
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	jexec alcatraz $(atf_get_srcdir)/../common/divapp 1001 divert-back &
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	indivapp_pid=$!
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	jexec alcatraz $(atf_get_srcdir)/../common/divapp 1002 divert-back &
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	outdivapp_pid=$!
400
	# Wait for the divapps to be ready
401
	sleep 1
402

403
	atf_check -s not-exit:0 -o ignore ping -c1 -s56 -t1 192.0.2.2
404

405
	wait $indivapp_pid
406
	atf_check_not_equal 0 $?
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	wait $outdivapp_pid
408
	atf_check_not_equal 0 $?
409

410
	jexec alcatraz $(atf_get_srcdir)/../common/divapp 1001 divert-back &
411
	indivapp_pid=$!
412
	jexec alcatraz $(atf_get_srcdir)/../common/divapp 1002 divert-back &
413
	outdivapp_pid=$!
414
	# Wait for the divapps to be ready
415
	sleep 1
416

417
	atf_check -s not-exit:0 -o ignore ping -c1 -s56 -t1 2001:db8::2
418

419
	wait $indivapp_pid
420
	atf_check_not_equal 0 $?
421
	wait $outdivapp_pid
422
	atf_check_not_equal 0 $?
423

424
	# }
425

426
	# b) ping should NOT time out due to wide enough dummynet pipes {
427

428
	jexec alcatraz dnctl pipe 2001 config bw 100KByte/s
429
	jexec alcatraz dnctl pipe 2002 config bw 100KByte/s
430

431
	jexec alcatraz pfctl -e
432
	pft_set_rules alcatraz \
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	    "ether pass in from 02:00:00:00:00:01 l3 all dnpipe 2001" \
434
	    "ether pass out to 02:00:00:00:00:01 l3 all dnpipe 2002 " \
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	    "pass all" \
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	    "pass in inet proto icmp icmp-type echoreq divert-to 127.0.0.1 port 2001 no state" \
437
	    "pass out inet proto icmp icmp-type echorep divert-to 127.0.0.1 port 2002 no state" \
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	    "pass in inet6 proto icmp6 icmp6-type echoreq divert-to ::1 port 2001 no state" \
439
	    "pass out inet6 proto icmp6 icmp6-type echorep divert-to ::1 port 2002 no state"
440

441
	jexec alcatraz $(atf_get_srcdir)/../common/divapp 2001 divert-back &
442
	indivapp_pid=$!
443
	jexec alcatraz $(atf_get_srcdir)/../common/divapp 2002 divert-back &
444
	outdivapp_pid=$!
445
	# Wait for the divapps to be ready
446
	sleep 1
447

448
	atf_check -o ignore ping -c1 -s56 -t1 192.0.2.2
449

450
	wait $indivapp_pid
451
	atf_check_equal 0 $?
452
	wait $outdivapp_pid
453
	atf_check_equal 0 $?
454

455
	jexec alcatraz $(atf_get_srcdir)/../common/divapp 2001 divert-back &
456
	indivapp_pid=$!
457
	jexec alcatraz $(atf_get_srcdir)/../common/divapp 2002 divert-back &
458
	outdivapp_pid=$!
459
	# Wait for the divapps to be ready
460
	sleep 1
461

462
	atf_check -o ignore ping -c1 -s56 -t1 2001:db8::2
463

464
	wait $indivapp_pid
465
	atf_check_equal 0 $?
466
	wait $outdivapp_pid
467
	atf_check_equal 0 $?
468

469
	# }
470
}
471
in_dn_in_div_in_out_div_out_dn_out_cleanup()
472
{
473
	pft_cleanup
474
}
475

476
atf_test_case "pr260867" "cleanup"
477
pr260867_head()
478
{
479
	atf_set descr 'Test for the loop reported in PR260867'
480
	atf_set require.user root
481
	atf_set require.kmods ipdivert
482
}
483
pr260867_body()
484
{
485
	pft_init
486

487
	epair=$(vnet_mkepair)
488

489
	atf_check ifconfig ${epair}a 192.0.2.1/24 up
490
	atf_check ifconfig ${epair}a inet6 2001:db8::1/64 no_dad
491

492
	vnet_mkjail alcatraz ${epair}b
493
	atf_check jexec alcatraz ifconfig ${epair}b 192.0.2.2/24 up
494
	atf_check jexec alcatraz ifconfig ${epair}b inet6 2001:db8::2/64 no_dad
495

496
	# Sanity check
497
	atf_check -o ignore ping -c3 192.0.2.2
498
	atf_check -o ignore ping -c3 2001:db8::2
499

500
	jexec alcatraz /usr/sbin/inetd -p ${PWD}/inetd-echo.pid $(atf_get_srcdir)/echo_inetd.conf
501
	jexec alcatraz $(atf_get_srcdir)/../common/divapp 1001 divert-back &
502

503
	jexec alcatraz pfctl -e
504
	pft_set_rules alcatraz \
505
	    "pass in on ${epair}b proto tcp from any to port 7 divert-to 0.0.0.0 port 1001"
506

507
	reply=$(echo "foo" | nc -N 192.0.2.2 7)
508
	if [ "${reply}" != "foo" ]; then
509
		atf_fail "Did not receive v4 echo reply"
510
	fi
511

512
	reply=$(echo "foo" | nc -N -6 2001:db8::2 7)
513
	if [ "${reply}" != "foo" ]; then
514
		atf_fail "Did not receive v6 echo reply"
515
	fi
516
}
517
pr260867_cleanup()
518
{
519
	pft_cleanup
520
}
521

522
atf_test_case "pr260867_icmp" "cleanup"
523
pr260867_icmp_head()
524
{
525
	atf_set descr 'Variant of the PR260867 test'
526
	atf_set require.user root
527
	atf_set require.kmods ipdivert
528
}
529
pr260867_icmp_body()
530
{
531
	pft_init
532

533
	epair=$(vnet_mkepair)
534

535
	atf_check ifconfig ${epair}a 192.0.2.1/24 up
536
	atf_check ifconfig ${epair}a inet6 2001:db8::1/64 no_dad
537

538
	vnet_mkjail alcatraz ${epair}b
539
	atf_check jexec alcatraz ifconfig ${epair}b 192.0.2.2/24 up
540
	atf_check jexec alcatraz ifconfig ${epair}b inet6 2001:db8::2/64 no_dad
541

542
	# Sanity check
543
	atf_check -o ignore ping -c3 192.0.2.2
544
	atf_check -o ignore ping -c3 2001:db8::2
545

546
	jexec alcatraz $(atf_get_srcdir)/../common/divapp 1001 divert-back &
547

548
	jexec alcatraz pfctl -e
549
	pft_set_rules alcatraz \
550
	    "pass in on ${epair}b proto icmp from any to any divert-to 0.0.0.0 port 1001" \
551
	    "pass in on ${epair}b proto icmp6 from any to any divert-to :: port 1001"
552

553
	atf_check -o ignore ping -c 3 192.0.2.2
554
	atf_check -o ignore ping -c 3 2001:db8::2
555
}
556
pr260867_icmp_cleanup()
557
{
558
	pft_cleanup
559
}
560

561
atf_init_test_cases()
562
{
563
	atf_add_test_case "in_div"
564
	atf_add_test_case "in_div_in"
565

566
	atf_add_test_case "out_div"
567
	atf_add_test_case "out_div_out"
568

569
	atf_add_test_case "in_div_in_fwd_out_div_out"
570

571
	atf_add_test_case "in_dn_in_div_in_out_div_out_dn_out"
572

573
	atf_add_test_case "pr260867"
574
	atf_add_test_case "pr260867_icmp"
575
}
576

577
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