2 files changed, 147 insertions, 1 deletions

diff --git a/tests/sys/netpfil/pf/Makefile b/tests/sys/netpfil/pf/Makefile
index ded0002768b0..7b2e32c09543 100644
--- a/tests/sys/netpfil/pf/Makefile
+++ b/tests/sys/netpfil/pf/Makefile
@@ -56,7 +56,8 @@ ATF_TESTS_SH+=	altq \
 		synproxy \
 		table \
 		tcp \
-		tos
+		tos \
+		unmapped_mbuf
 
 ATF_TESTS_PYTEST+=	frag4.py
 ATF_TESTS_PYTEST+=	frag6.py
diff --git a/tests/sys/netpfil/pf/unmapped_mbuf.sh b/tests/sys/netpfil/pf/unmapped_mbuf.sh
new file mode 100644
index 000000000000..d8005d12b44d
--- /dev/null
+++ b/tests/sys/netpfil/pf/unmapped_mbuf.sh
@@ -0,0 +1,145 @@
+#
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# Copyright (c) 2026 KUROSAWA Takahiro <takahiro.kurosawa@gmail.com>
+#
+# 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.
+
+. $(atf_get_srcdir)/utils.subr
+
+HELPER=$(atf_get_srcdir)/../../common/sendfile_helper
+
+# pf must call mb_unmapped_to_ext() before passing an output mbuf to a network
+# interface if it does not accept unmapped mbufs as ip_output() does. These
+# tests make sure that unmapped mbufs are correctly converted to mapped ones
+# before pf passes mbufs to interfaces.
+
+atf_test_case "v4" "cleanup"
+v4_head() {
+	atf_set descr 'unmapped mbuf IPv4 test'
+	atf_set require.user root
+}
+
+v4_body() {
+	pft_init
+
+	l=$(vnet_mkepair)
+	vnet_mkjail a ${l}a
+	jexec a ifconfig ${l}a 192.0.2.1/24 up
+	vnet_mkjail b ${l}b
+	jexec b ifconfig ${l}b 192.0.2.2/24 up
+
+	# Sanity check
+	atf_check -s exit:0 -o ignore jexec a ping -c 1 192.0.2.2
+
+	jexec a pfctl -e
+	pft_set_rules a "pass out on ${l}a route-to (${l}a 192.0.2.2) all"
+	jexec b timeout 30s nc -4 -d -l 2345 > out &
+	sleep 1
+	atf_check -s exit:0 -o ignore \
+	    jexec a ${HELPER} -c 192.0.2.2 -p 2345 ${HELPER} 0 512 0
+	wait
+	atf_check_equal $(dd bs=512 count=1 if=${HELPER} | sha256 -q) \
+	    $(sha256 -q out)
+}
+
+v4_cleanup() {
+	pft_cleanup
+	rm -f out
+}
+
+atf_test_case "v6" "cleanup"
+v6_head() {
+	atf_set descr 'unmapped mbuf IPv6 test'
+	atf_set require.user root
+}
+
+v6_body() {
+	pft_init
+
+	l=$(vnet_mkepair)
+	vnet_mkjail a ${l}a
+	jexec a ifconfig ${l}a inet6 2001:db8::1/64 up
+	vnet_mkjail b ${l}b
+	jexec b ifconfig ${l}b inet6 2001:db8::2/64 up
+
+	# Sanity check
+	atf_check -s exit:0 -o ignore jexec a ping -c 1 2001:db8::2
+
+	jexec a pfctl -e
+	pft_set_rules a "pass out on ${l}a route-to (${l}a 2001:db8::2) all"
+	jexec b timeout 30s nc -6 -d -l 2345 > out &
+	sleep 1
+	atf_check -s exit:0 -o ignore \
+	    jexec a ${HELPER} -c 2001:db8::2 -p 2345 ${HELPER} 0 512 0
+	wait
+	atf_check_equal $(dd bs=512 count=1 if=${HELPER} | sha256 -q) \
+	    $(sha256 -q out)
+}
+
+v6_cleanup() {
+	pft_cleanup
+	rm -f out
+}
+
+atf_test_case "dummynet" "cleanup"
+dummynet_head() {
+	atf_set descr 'unmapped mbuf dummynet test'
+	atf_set require.user root
+}
+
+dummynet_body() {
+	pft_init
+
+	l=$(vnet_mkepair)
+	vnet_mkjail a ${l}a
+	jexec a ifconfig ${l}a 192.0.2.1/24 up
+	vnet_mkjail b ${l}b
+	jexec b ifconfig ${l}b 192.0.2.2/24 up
+
+	# Sanity check
+	atf_check -s exit:0 -o ignore jexec a ping -c 1 192.0.2.2
+
+	atf_check -s exit:0 -o ignore \
+	    jexec a dnctl pipe 1 config delay 100
+	jexec a pfctl -e
+	pft_set_rules a "pass out on ${l}a route-to (${l}a 192.0.2.2) all dnpipe 1"
+	jexec b timeout 30s nc -4 -d -l 2345 > out &
+	sleep 1
+	atf_check -s exit:0 -o ignore \
+	    jexec a ${HELPER} -c 192.0.2.2 -p 2345 ${HELPER} 0 512 0
+	wait
+	atf_check_equal $(dd bs=512 count=1 if=${HELPER} | sha256 -q) \
+	    $(sha256 -q out)
+}
+
+dummynet_cleanup() {
+	pft_cleanup
+	rm -f out
+}
+
+atf_init_test_cases()
+{
+	atf_add_test_case "v4"
+	atf_add_test_case "v6"
+	atf_add_test_case "dummynet"
+}