netpfil tests: Add forward test for the three firewalls

Submitted by:	Ahsan Barkati
Reviewed by:	kp
Sponsored by:	Google, Inc. (GSoC 2019)
Differential Revision:	https://reviews.freebsd.org/D21321

tests/sys/netpfil/common/Makefile

@@ -9,7 +9,8 @@ ATF_TESTS_SH+=	\
 		pass_block \
 		nat \
 		tos \
-		fragments
+		fragments \
+		forward
 
 ${PACKAGE}FILES+=	\
 		utils.subr \

tests/sys/netpfil/common/forward.sh

@@ -0,0 +1,101 @@
+#-
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright (c) 2019 Ahsan Barkati
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# $FreeBSD$
+#
+
+. $(atf_get_srcdir)/utils.subr
+. $(atf_get_srcdir)/runner.subr
+
+v4_head()
+{
+	atf_set descr 'Basic forwarding test'
+	atf_set require.user root
+	atf_set require.progs scapy
+}
+
+v4_body()
+{
+	firewall=$1
+	firewall_init $firewall
+
+	epair_send=$(vnet_mkepair)
+	ifconfig ${epair_send}a 192.0.2.1/24 up
+
+	epair_recv=$(vnet_mkepair)
+	ifconfig ${epair_recv}a up
+
+	vnet_mkjail iron ${epair_send}b ${epair_recv}b
+	jexec iron ifconfig ${epair_send}b 192.0.2.2/24 up
+	jexec iron ifconfig ${epair_recv}b 198.51.100.2/24 up
+	jexec iron sysctl net.inet.ip.forwarding=1
+	jexec iron arp -s 198.51.100.3 00:01:02:03:04:05
+	route add -net 198.51.100.0/24 192.0.2.2
+
+
+	atf_check -s exit:0 $(atf_get_srcdir)/pft_ping.py \
+		--sendif ${epair_send}a \
+		--to 198.51.100.3 \
+		--recvif ${epair_recv}a
+
+	firewall_config "iron" ${firewall} \
+		"pf" \
+			"block in" \
+		"ipfw" \
+			"ipfw -q add 100 deny all from any to any in" \
+		"ipf" \
+			"block in all" \
+
+	atf_check -s exit:1 $(atf_get_srcdir)/pft_ping.py \
+		--sendif ${epair_send}a \
+		--to 198.51.100.3 \
+		--recvif ${epair_recv}a
+
+	firewall_config "iron" ${firewall} \
+		"pf" \
+			"block out" \
+		"ipfw" \
+			"ipfw -q add 100 deny all from any to any out" \
+		"ipf" \
+			"block out all" \
+
+	atf_check -s exit:1 $(atf_get_srcdir)/pft_ping.py \
+		--sendif ${epair_send}a \
+		--to 198.51.100.3 \
+		--recv ${epair_recv}a
+}
+
+v4_cleanup()
+{
+	firewall=$1
+	firewall_cleanup $firewall
+}
+
+setup_tests \
+		v4 \
+			pf \
+			ipfw \
+			ipf