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bridge test: spanning tree

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Basic test case where we create a bridge loop, verify that we really are
looping and then enable spanning tree to resolve the loop.

Reviewed by:	philip
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D23959
This commit is contained in:
kp 2020-03-10 06:28:45 +00:00
parent 9e46724023
commit b1af9442d2
1 changed files with 69 additions and 0 deletions
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69
tests/sys/net/if_bridge_test.sh
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@ -67,7 +67,76 @@ bridge_transmit_ipv4_unicast_cleanup()
vnet_cleanup
}
atf_test_case "stp" "cleanup"
stp_head()
{
atf_set descr 'Spanning tree test'
atf_set require.user root
atf_set require.progs jq
}
stp_body()
{
vnet_init
epair_one=$(vnet_mkepair)
epair_two=$(vnet_mkepair)
bridge_a=$(vnet_mkbridge)
bridge_b=$(vnet_mkbridge)
vnet_mkjail a ${bridge_a} ${epair_one}a ${epair_two}a
vnet_mkjail b ${bridge_b} ${epair_one}b ${epair_two}b
jexec a ifconfig ${bridge_a} up
jexec a ifconfig ${epair_one}a up
jexec a ifconfig ${epair_two}a up
jexec a ifconfig ${bridge_a} addm ${epair_one}a
jexec a ifconfig ${bridge_a} addm ${epair_two}a
jexec b ifconfig ${bridge_b} up
jexec b ifconfig ${epair_one}b up
jexec b ifconfig ${epair_two}b up
jexec b ifconfig ${bridge_b} addm ${epair_one}b
jexec b ifconfig ${bridge_b} addm ${epair_two}b
jexec a ifconfig ${bridge_a} 192.0.2.1/24
# Give the interfaces some time to come up and pass some traffic
sleep 5
# Confirm that there's looping traffic
nbr=$(jexec a netstat -I ${bridge_a} --libxo json \
| jq ".statistics.interface[0].\"received-packets\"")
if [ ${nbr} -lt 100 ]
then
atf_fail "Expected bridging loop, but found very few packets."
fi
# Enable spanning tree
jexec a ifconfig ${bridge_a} stp ${epair_one}a
jexec a ifconfig ${bridge_a} stp ${epair_two}a
jexec b ifconfig ${bridge_b} stp ${epair_one}b
jexec b ifconfig ${bridge_b} stp ${epair_two}b
# Give STP time to do its thing
sleep 5
a_discard=$(jexec a ifconfig ${bridge_a} | grep discarding)
b_discard=$(jexec b ifconfig ${bridge_b} | grep discarding)
if [ -z "${a_discard}" ] && [ -z "${b_discard}" ]
then
atf_fail "STP failed to detect bridging loop"
fi
}
stp_cleanup()
{
vnet_cleanup
}
atf_init_test_cases()
{
atf_add_test_case "bridge_transmit_ipv4_unicast"
atf_add_test_case "stp"
}