Add basic NAT test for pf, ipf and ipfw
Add common firewall NAT tests for pf, ipf and ipfw (using both in-kernel and userspace NAT). Submitted by: Ahsan Barkati Sponsored by: Google, Inc. (GSoC 2019) Reviewed by: kp Approved by: bz (mentor) MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D21199
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thj
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@ -5,9 +5,12 @@ PACKAGE= tests
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TESTSDIR= ${TESTSBASE}/sys/netpfil/common
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ATF_TESTS_SH+= pass_block \
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ATF_TESTS_SH+= \
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pass_block \
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nat
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${PACKAGE}FILES+= utils.subr \
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runner.subr
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${PACKAGE}FILES+= \
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utils.subr \
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runner.subr
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.include <bsd.test.mk>
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156
tests/sys/netpfil/common/nat.sh
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156
tests/sys/netpfil/common/nat.sh
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@ -0,0 +1,156 @@
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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) 2019 Ahsan Barkati
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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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# $FreeBSD$
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#
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. $(atf_get_srcdir)/utils.subr
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. $(atf_get_srcdir)/runner.subr
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basic_head()
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{
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atf_set descr 'Basic IPv4 NAT 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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firewall=$1
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firewall_init $firewall
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nat_init $firewall
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epair_host_nat=$(vnet_mkepair)
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epair_client1_nat=$(vnet_mkepair)
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epair_client2_nat=$(vnet_mkepair)
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vnet_mkjail nat ${epair_host_nat}b ${epair_client1_nat}a ${epair_client2_nat}a
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vnet_mkjail client1 ${epair_client1_nat}b
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vnet_mkjail client2 ${epair_client2_nat}b
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ifconfig ${epair_host_nat}a 198.51.100.2/24 up
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jexec nat ifconfig ${epair_host_nat}b 198.51.100.1/24 up
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jexec nat ifconfig ${epair_client1_nat}a 192.0.2.1/24 up
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jexec client1 ifconfig ${epair_client1_nat}b 192.0.2.2/24 up
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jexec nat ifconfig ${epair_client2_nat}a 192.0.3.1/24 up
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jexec client2 ifconfig ${epair_client2_nat}b 192.0.3.2/24 up
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jexec nat sysctl net.inet.ip.forwarding=1
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jexec client1 route add -net 198.51.100.0/24 192.0.2.1
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jexec client2 route add -net 198.51.100.0/24 192.0.3.1
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# ping fails without NAT configuration
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atf_check -s exit:2 -o ignore jexec client1 ping -t 1 -c 1 198.51.100.2
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atf_check -s exit:2 -o ignore jexec client2 ping -t 1 -c 1 198.51.100.2
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firewall_config nat ${firewall} \
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"pf" \
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"nat pass on ${epair_host_nat}b inet from any to any -> (${epair_host_nat}b)" \
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"ipfw" \
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"ipfw -q nat 123 config if ${epair_host_nat}b" \
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"ipfw -q add 1000 nat 123 all from any to any" \
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"ipfnat" \
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"map ${epair_host_nat}b 192.0.3.0/24 -> 0/32" \
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"map ${epair_host_nat}b 192.0.2.0/24 -> 0/32" \
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# ping is successful now
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atf_check -s exit:0 -o ignore jexec client1 ping -t 1 -c 1 198.51.100.2
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atf_check -s exit:0 -o ignore jexec client2 ping -t 1 -c 1 198.51.100.2
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}
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basic_cleanup()
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{
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firewall=$1
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firewall_cleanup $firewall
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}
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userspace_nat_head()
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{
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atf_set descr 'Nat test for ipfw using userspace natd'
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atf_set require.user root
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}
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userspace_nat_body()
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{
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firewall=$1
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firewall_init $firewall
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if ! kldstat -q -m ipdivert; then
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atf_skip "This test requires ipdivert module loaded"
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fi
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epair_host_nat=$(vnet_mkepair)
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epair_client1_nat=$(vnet_mkepair)
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epair_client2_nat=$(vnet_mkepair)
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vnet_mkjail nat ${epair_host_nat}b ${epair_client1_nat}a ${epair_client2_nat}a
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vnet_mkjail client1 ${epair_client1_nat}b
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vnet_mkjail client2 ${epair_client2_nat}b
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ifconfig ${epair_host_nat}a 198.51.100.2/24 up
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jexec nat ifconfig ${epair_host_nat}b 198.51.100.1/24 up
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jexec nat ifconfig ${epair_client1_nat}a 192.0.2.1/24 up
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jexec client1 ifconfig ${epair_client1_nat}b 192.0.2.2/24 up
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jexec nat ifconfig ${epair_client2_nat}a 192.0.3.1/24 up
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jexec client2 ifconfig ${epair_client2_nat}b 192.0.3.2/24 up
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jexec nat sysctl net.inet.ip.forwarding=1
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jexec client1 route add -net 198.51.100.0/24 192.0.2.1
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jexec client2 route add -net 198.51.100.0/24 192.0.3.1
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# Test the userspace NAT of ipfw
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# ping fails without NAT configuration
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atf_check -s exit:2 -o ignore jexec client1 ping -t 1 -c 1 198.51.100.2
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atf_check -s exit:2 -o ignore jexec client2 ping -t 1 -c 1 198.51.100.2
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firewall_config nat ${firewall} \
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"ipfw" \
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"natd -interface ${epair_host_nat}b" \
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"ipfw -q add divert natd all from any to any via ${epair_host_nat}b" \
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# ping is successful now
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atf_check -s exit:0 -o ignore jexec client1 ping -t 1 -c 1 198.51.100.2
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atf_check -s exit:0 -o ignore jexec client2 ping -t 1 -c 1 198.51.100.2
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}
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userspace_nat_cleanup()
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{
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firewall=$1
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firewall_cleanup $firewall
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}
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setup_tests \
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basic \
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pf \
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ipfw \
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ipfnat \
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userspace_nat \
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ipfw
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@ -37,7 +37,7 @@ firewall_config()
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shift
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while [ $# -gt 0 ]; do
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if [ $(is_firewall $fw) -eq 1 ]; then
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if [ $(is_firewall "$1") -eq 1 ]; then
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current_fw="$1"
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shift
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filename=${current_fw}.rule
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@ -94,8 +94,8 @@ firewall_init()
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atf_skip "This test requires ipf"
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fi
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elif [ ${firewall} == "ipfnat" ]; then
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if ! kldstat -q -m ipfw_nat; then
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atf_skip "This test requires ipfw_nat"
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if ! kldstat -q -m ipfilter; then
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atf_skip "This test requires ipf"
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fi
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else
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atf_fail "$fw is not a valid firewall to initialize"
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@ -103,6 +103,16 @@ firewall_init()
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}
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nat_init()
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{
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firewall=$1
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if [ ${firewall} == "ipfw" ]; then
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if ! kldstat -q -m ipfw_nat; then
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atf_skip "This test requires ipfw_nat"
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fi
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fi
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}
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is_firewall()
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{
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if [ "$1" = "pf" -o "$1" = "ipfw" -o "$1" = "ipf" -o "$1" = "ipfnat" ]; then
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@ -110,4 +120,4 @@ is_firewall()
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else
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echo 0
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fi
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}
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}
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