mirror of
https://github.com/freebsd/freebsd-src
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2f20d80692
MFC after: 1 week Sponsored by: Modirum MDPay Differential Revision: https://reviews.freebsd.org/D32139
227 lines
5.1 KiB
Bash
227 lines
5.1 KiB
Bash
# $FreeBSD$
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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 Modirum MDPay
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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 "basic" "cleanup"
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basic_head()
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{
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atf_set descr 'Basic syncookie test'
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atf_set require.user root
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}
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basic_body()
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{
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pft_init
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epair=$(vnet_mkepair)
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vnet_mkjail alcatraz ${epair}b
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jexec alcatraz ifconfig ${epair}b 192.0.2.1/24 up
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jexec alcatraz /usr/sbin/inetd -p inetd-alcatraz.pid \
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$(atf_get_srcdir)/echo_inetd.conf
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ifconfig ${epair}a 192.0.2.2/24 up
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jexec alcatraz pfctl -e
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pft_set_rules alcatraz \
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"set syncookies always" \
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"pass in" \
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"pass out"
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# Sanity check
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atf_check -s exit:0 -o ignore ping -c 1 192.0.2.1
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reply=$(echo foo | nc -N -w 5 192.0.2.1 7)
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if [ "${reply}" != "foo" ];
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then
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atf_fail "Failed to connect to syncookie protected echo daemon"
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fi
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}
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basic_cleanup()
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{
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rm -f inetd-alcatraz.pid
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pft_cleanup
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}
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atf_test_case "forward" "cleanup"
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forward_head()
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{
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atf_set descr 'Syncookies for forwarded hosts'
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atf_set require.user root
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}
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forward_body()
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{
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pft_init
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epair_in=$(vnet_mkepair)
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epair_out=$(vnet_mkepair)
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vnet_mkjail fwd ${epair_in}b ${epair_out}a
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vnet_mkjail srv ${epair_out}b
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jexec fwd ifconfig ${epair_in}b 192.0.2.1/24 up
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jexec fwd ifconfig ${epair_out}a 198.51.100.1/24 up
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jexec fwd sysctl net.inet.ip.forwarding=1
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jexec srv ifconfig ${epair_out}b 198.51.100.2/24 up
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jexec srv route add default 198.51.100.1
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jexec srv /usr/sbin/inetd -p inetd-alcatraz.pid \
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$(atf_get_srcdir)/echo_inetd.conf
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ifconfig ${epair_in}a 192.0.2.2/24 up
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route add -net 198.51.100.0/24 192.0.2.1
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jexec fwd pfctl -e
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pft_set_rules fwd \
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"set syncookies always" \
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"pass in" \
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"pass out"
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# Sanity check
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atf_check -s exit:0 -o ignore ping -c 1 198.51.100.2
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reply=$(echo foo | nc -N -w 5 198.51.100.2 7)
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if [ "${reply}" != "foo" ];
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then
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atf_fail "Failed to connect to syncookie protected echo daemon"
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fi
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}
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forward_cleanup()
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{
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rm -f inetd-alcatraz.pid
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pft_cleanup
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}
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atf_test_case "nostate" "cleanup"
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nostate_head()
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{
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atf_set descr 'Ensure that we do not create until SYN|ACK'
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atf_set require.user root
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atf_set require.progs scapy
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}
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nostate_body()
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{
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pft_init
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epair=$(vnet_mkepair)
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ifconfig ${epair}a 192.0.2.2/24 up
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vnet_mkjail alcatraz ${epair}b
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jexec alcatraz ifconfig ${epair}b 192.0.2.1/24 up
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jexec alcatraz pfctl -e
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pft_set_rules alcatraz \
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"set syncookies always" \
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"pass in" \
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"pass out"
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# Sanity check
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atf_check -s exit:0 -o ignore ping -c 1 192.0.2.1
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# Now syn flood to create many states
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${common_dir}/pft_synflood.py \
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--sendif ${epair}a \
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--to 192.0.2.2 \
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--count 20
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states=$(jexec alcatraz pfctl -ss | grep tcp)
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if [ -n "$states" ];
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then
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echo "$states"
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atf_fail "Found unexpected state"
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fi
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}
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nostate_cleanup()
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{
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pft_cleanup
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}
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atf_test_case "adaptive" "cleanup"
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adaptive_head()
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{
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atf_set descr 'Adaptive mode test'
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atf_set require.user root
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atf_set require.progs scapy
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}
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adaptive_body()
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{
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pft_init
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epair=$(vnet_mkepair)
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ifconfig ${epair}a 192.0.2.2/24 up
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vnet_mkjail alcatraz ${epair}b
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jexec alcatraz ifconfig ${epair}b 192.0.2.1/24 up
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jexec alcatraz pfctl -e
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pft_set_rules alcatraz \
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"set limit states 100" \
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"set syncookies adaptive (start 10%%, end 5%%)" \
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"pass in" \
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"pass out"
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# Sanity check
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atf_check -s exit:0 -o ignore ping -c 1 192.0.2.1
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# Now syn flood to create many states
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${common_dir}/pft_synflood.py \
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--sendif ${epair}a \
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--to 192.0.2.2 \
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--count 100
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# Adaptive mode should kick in and stop us from creating more than
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# about 10 states
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states=$(jexec alcatraz pfctl -ss | grep tcp | wc -l)
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if [ "$states" -gt 20 ];
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then
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echo "$states"
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atf_fail "Found unexpected states"
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fi
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}
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adaptive_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 "basic"
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atf_add_test_case "forward"
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atf_add_test_case "nostate"
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atf_add_test_case "adaptive"
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}
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