net tests: basic if_gif(4) test case

MFC after:	3 weeks
Sponsored by:	Rubicon Communications, LLC ("Netgate")
Differential Revision:	https://reviews.freebsd.org/D32836

tests/sys/net/Makefile

@@ -9,6 +9,7 @@ ATF_TESTS_C+=	if_epair
 ATF_TESTS_SH+=	if_bridge_test
 TEST_METADATA.if_bridge_test+=	required_programs="python"
 ATF_TESTS_SH+=	if_clone_test
+ATF_TESTS_SH+=	if_gif
 ATF_TESTS_SH+=	if_lagg_test
 ATF_TESTS_SH+=	if_tun_test
 ATF_TESTS_SH+=	if_vlan

tests/sys/net/if_gif.sh

@@ -0,0 +1,77 @@
+# $FreeBSD$
+#
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright (c) 2021 Rubicon Communications, LLC (Netgate)
+#
+# 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.
+
+. $(atf_get_srcdir)/../common/vnet.subr
+
+atf_test_case "basic" "cleanup"
+basic_head()
+{
+	atf_set descr 'Basic gif(4) test'
+	atf_set require.user root
+}
+
+basic_body()
+{
+	vnet_init
+	if ! kldstat -q -m if_gif; then
+		atf_skip "This test requires if_gif"
+	fi
+
+	epair=$(vnet_mkepair)
+
+	vnet_mkjail one ${epair}a
+	jexec one ifconfig ${epair}a 192.0.2.1/24 up
+	gone=$(jexec one ifconfig gif create)
+	jexec one ifconfig $gone tunnel 192.0.2.1 192.0.2.2
+	jexec one ifconfig $gone inet 198.51.100.1/24 198.51.100.2 up
+
+	vnet_mkjail two ${epair}b
+	jexec two ifconfig ${epair}b 192.0.2.2/24 up
+	gtwo=$(jexec two ifconfig gif create)
+	jexec two ifconfig $gtwo tunnel 192.0.2.2 192.0.2.1
+	jexec two ifconfig $gtwo inet 198.51.100.2/24 198.51.100.1 up
+
+	# Sanity check
+	atf_check -s exit:0 -o ignore \
+	    jexec one ping -c 1 192.0.2.2
+
+	# Tunnel test
+	atf_check -s exit:0 -o ignore \
+	    jexec one ping -c 1 198.51.100.2
+	atf_check -s exit:0 -o ignore \
+	    jexec two ping -c 1 198.51.100.1
+}
+
+basic_cleanup()
+{
+	vnet_cleanup
+}
+
+atf_init_test_cases()
+{
+	atf_add_test_case "basic"
+}