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diff --git a/tests/sys/netpfil/common/Makefile b/tests/sys/netpfil/common/Makefile
--- a/tests/sys/netpfil/common/Makefile
+++ b/tests/sys/netpfil/common/Makefile
@@ -6,6 +6,7 @@
ATF_TESTS_SH+= \
+ dummynet \
pass_block \
nat \
tos \
diff --git a/tests/sys/netpfil/common/dummynet.sh b/tests/sys/netpfil/common/dummynet.sh
new file mode 100644
--- /dev/null
+++ b/tests/sys/netpfil/common/dummynet.sh
@@ -0,0 +1,75 @@
+# $FreeBSD$
+#
+# 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)/utils.subr
+. $(atf_get_srcdir)/runner.subr
+
+pipe_head()
+{
+ atf_set descr 'Basic pipe test'
+ atf_set require.user root
+}
+
+pipe_body()
+{
+ fw=$1
+ firewall_init $fw
+ dummynet_init $fw
+
+ epair=$(vnet_mkepair)
+ vnet_mkjail alcatraz ${epair}b
+
+ ifconfig ${epair}a 192.0.2.1/24 up
+ jexec alcatraz ifconfig ${epair}b 192.0.2.2/24 up
+
+ # Sanity check
+ atf_check -s exit:0 -o ignore ping -i .1 -c 3 -s 1200 192.0.2.2
+
+ jexec alcatraz dnctl pipe 1 config bw 30Byte/s
+
+ firewall_config alcatraz ${fw} \
+ "ipfw" \
+ "ipfw add 1000 pipe 1 ip from any to any"
+
+ # single ping succeeds just fine
+ atf_check -s exit:0 -o ignore ping -c 1 192.0.2.2
+
+ # Saturate the link
+ ping -i .1 -c 5 -s 1200 192.0.2.2
+
+ # We should now be hitting the limits and get this packet dropped.
+ atf_check -s exit:2 -o ignore ping -c 1 -s 1200 192.0.2.2
+}
+
+pipe_cleanup()
+{
+ firewall_cleanup $1
+}
+
+setup_tests \
+ pipe \
+ ipfw
diff --git a/tests/sys/netpfil/common/utils.subr b/tests/sys/netpfil/common/utils.subr
--- a/tests/sys/netpfil/common/utils.subr
+++ b/tests/sys/netpfil/common/utils.subr
@@ -103,6 +103,21 @@
}
+dummynet_init()
+{
+ firewall=$1
+
+ if ! kldstat -q -m dummynet; then
+ atf_skip "This test requires dummynet"
+ fi
+
+ if [ ${firewall} == "ipfw" ]; then
+ # Nothing. This is okay.
+ else
+ atf_skip "${firewall} does not support dummynet"
+ fi
+}
+
nat_init()
{
firewall=$1

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