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netpfil tests: dummynet queue test

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Test prioritisation and dummynet queues.
We need to give the pipe sufficient bandwidth for dummynet to work.
Given that we can't rely on the TCP connection failing alltogether, but
we can measure the effect of dummynet by imposing a time limit on a
larger data transfer.

If TCP is prioritised it'll get most of the pipe bandwidth and easily
manage to transfer the data in 3 seconds or less. When not prioritised
this will not succeed.

MFC after:	2 weeks
Sponsored by:	Rubicon Communications, LLC ("Netgate")
Differential Revision:	https://reviews.freebsd.org/D31788
This commit is contained in:
Kristof Provost 2021-09-02 15:38:04 +02:00
parent 5fda5913e1
commit cb6bfef9ca
1 changed files with 104 additions and 0 deletions
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104
tests/sys/netpfil/common/dummynet.sh
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@ -112,8 +112,112 @@ pipe_v6_cleanup()
firewall_cleanup $1
}
queue_head()
{
atf_set descr 'Basic queue test'
atf_set require.user root
}
queue_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
jexec alcatraz /usr/sbin/inetd -p inetd-alcatraz.pid \
$(atf_get_srcdir)/../pf/echo_inetd.conf
# Sanity check
atf_check -s exit:0 -o ignore ping -i .1 -c 3 -s 1200 192.0.2.2
reply=$(echo "foo" | nc -N 192.0.2.2 7)
if [ "$reply" != "foo" ];
then
atf_fail "Echo sanity check failed"
fi
jexec alcatraz dnctl pipe 1 config bw 1MByte/s
jexec alcatraz dnctl sched 1 config pipe 1 type wf2q+
jexec alcatraz dnctl queue 100 config sched 1 weight 99 mask all
jexec alcatraz dnctl queue 200 config sched 1 weight 1 mask all
firewall_config alcatraz ${fw} \
"ipfw" \
"ipfw add 1000 queue 100 tcp from 192.0.2.2 to any out" \
"ipfw add 1001 queue 200 icmp from 192.0.2.2 to any out" \
"ipfw add 1002 allow ip from any to any"
# Single ping succeeds
atf_check -s exit:0 -o ignore ping -c 1 192.0.2.2
# Unsaturated TCP succeeds
reply=$(echo "foo" | nc -w 5 -N 192.0.2.2 7)
if [ "$reply" != "foo" ];
then
atf_fail "Unsaturated echo failed"
fi
# Saturate the link
ping -f -s 1300 192.0.2.2 &
# Allow this to fill the queue
sleep 1
# TCP should still just pass
fails=0
for i in `seq 1 3`
do
result=$(dd if=/dev/zero bs=1024 count=2000 | timeout 3 nc -w 5 -N 192.0.2.2 7 | wc -c)
if [ $result -ne 2048000 ];
then
echo "Failed to prioritise TCP traffic. Got only $result bytes"
fails=$(( ${fails} + 1 ))
fi
done
if [ ${fails} -gt 0 ];
then
atf_fail "We failed prioritisation ${fails} times"
fi
# This will fail if we reverse the pola^W priority
firewall_config alcatraz ${fw} \
"ipfw" \
"ipfw add 1000 queue 200 tcp from 192.0.2.2 to any out" \
"ipfw add 1001 queue 100 icmp from 192.0.2.2 to any out" \
"ipfw add 1002 allow ip from any to any"
jexec alcatraz ping -f -s 1300 192.0.2.1 &
sleep 1
fails=0
for i in `seq 1 3`
do
result=$(dd if=/dev/zero bs=1024 count=2000 | timeout 3 nc -w 5 -N 192.0.2.2 7 | wc -c)
if [ $result -ne 2048000 ];
then
echo "Failed to prioritise TCP traffic. Got only $result bytes"
fails=$(( ${fails} + 1 ))
fi
done
if [ ${fails} -lt 3 ];
then
atf_fail "We failed reversed prioritisation only ${fails} times."
fi
}
queue_cleanup()
{
firewall_cleanup $1
}
setup_tests \
pipe \
ipfw \
pipe_v6 \
ipfw \
queue \
ipfw