AT_BANNER([bfd])

m4_define([BFD_CHECK], [
AT_CHECK([ovs-appctl bfd/show $1 | sed -e '/Time:/d' | sed -e '/Discriminator/d' | sed -e '/Interval:/d'],[0],
[dnl
	Forwarding: $2
	Detect Multiplier: 3
	Concatenated Path Down: $3

	Local Flags: $4
	Local Session State: $5
	Local Diagnostic: $6

	Remote Flags: $7
	Remote Session State: $8
	Remote Diagnostic: $9
])
])

m4_define([BFD_CHECK_TX], [
AT_CHECK([ovs-appctl bfd/show $1 | sed -n '/TX Interval/p'],[0],
[dnl
	TX Interval: Approx 1000ms
	Local Minimum TX Interval: $2
	Remote Minimum TX Interval: $3
])
])

m4_define([BFD_CHECK_RX], [
AT_CHECK([ovs-appctl bfd/show $1 | sed -n '/RX Interval/p'],[0],
[dnl
	RX Interval: Approx $2
	Local Minimum RX Interval: $2
	Remote Minimum RX Interval: $3
])
])
AT_SETUP([bfd - basic config on different bridges])
#Create 2 bridges connected by patch ports and enable BFD
OVS_VSWITCHD_START(
   [add-br br1 -- \
       set bridge br1 datapath-type=dummy \
       other-config:hwaddr=aa:55:aa:56:00:00 -- \
    add-port br1 p1 -- set Interface p1 type=patch \
       options:peer=p0 -- \
    add-port br0 p0 -- set Interface p0 type=patch \
       options:peer=p1 -- \
    set Interface p0 bfd:enable=true -- \
    set Interface p1 bfd:enable=true ])
ovs-appctl time/stop
for i in `seq 0 40`; do ovs-appctl time/warp 100; done

#Verify that BFD has been enabled on both interfaces.
BFD_CHECK([p1], [true], [false], [none], [up], [No Diagnostic], [none], [up], [No Diagnostic])
BFD_CHECK([p0], [true], [false], [none], [up], [No Diagnostic], [none], [up], [No Diagnostic])

AT_CHECK([ ovs-vsctl set interface p0 bfd:enable=false])
for i in `seq 0 40`; do ovs-appctl time/warp 100; done
BFD_CHECK([p1], [false], [false], [none], [down], [Control Detection Time Expired], [none], [down], [No Diagnostic])

AT_CHECK([ ovs-vsctl set interface p0 bfd:enable=true])
for i in `seq 0 40`; do ovs-appctl time/warp 100; done
BFD_CHECK([p1], [true], [false], [none], [up], [Control Detection Time Expired], [none], [up], [No Diagnostic])
BFD_CHECK([p0], [true], [false], [none], [up], [No Diagnostic], [none], [up], [Control Detection Time Expired])

ovs-vsctl del-br br0
AT_CHECK([ovs-appctl bfd/show p0], [2],[ignore], [no such bfd object
ovs-appctl: ovs-vswitchd: server returned an error
])
ovs-vsctl del-br br1
#Check that the entries are gone.
AT_CHECK([ovs-appctl bfd/show p1], [2],[ignore], [no such bfd object
ovs-appctl: ovs-vswitchd: server returned an error
])

OVS_VSWITCHD_STOP
AT_CLEANUP


AT_SETUP([bfd - Verify tunnel down detection])
#Create 3 bridges - br-bfd0, br-bfd1 and br-sw which is midway between the two. br2 is
#connected to br-bfd0 and br-bfd1 through patch ports p0-2 and p1-2. Enable BFD on
#interfaces in br-bfd0 and br-bfd1. When br-sw is dropping all packets, BFD should detect
# that the tunnel is down, and come back up when br-sw is working fine.

OVS_VSWITCHD_START(
   [add-br br-bfd0 -- \
       set bridge br-bfd0 datapath-type=dummy \
       other-config:hwaddr=aa:55:aa:56:00:00 -- \
    add-br br-bfd1 -- \
       set bridge br-bfd1 datapath-type=dummy \
       other-config:hwaddr=aa:55:aa:57:00:00 -- \
    add-br br-sw -- \
       set bridge br-sw datapath-type=dummy \
       other-config:hwaddr=aa:55:aa:58:00:00 -- \
    add-port br-sw p1-sw -- set Interface p1-sw type=patch \
       options:peer=p1 -- \
    add-port br-sw p0-sw -- set Interface p0-sw type=patch \
       options:peer=p0 -- \
    add-port br-bfd1 p1 -- set Interface p1 type=patch \
       options:peer=p1-sw bfd:enable=true -- \
    add-port br-bfd0 p0 -- set Interface p0 type=patch \
       options:peer=p0-sw bfd:enable=true --])

ovs-appctl time/stop

#Create 2 bridges connected by patch ports and enable BFD

AT_CHECK([ovs-ofctl add-flow br-sw 'priority=0,actions=NORMAL'])
#Verify that BFD is enabled.
for i in `seq 0 40`; do ovs-appctl time/warp 100; done
BFD_CHECK([p1], [true], [false], [none], [up], [No Diagnostic], [none], [up], [No Diagnostic])
BFD_CHECK([p0], [true], [false], [none], [up], [No Diagnostic], [none], [up], [No Diagnostic])

#Drop all packets in the br-sw bridge so that the tunnel is down.
AT_CHECK([ ovs-ofctl add-flow br-sw 'priority=5,actions=drop' ])
for i in `seq 0 40`; do ovs-appctl time/warp 100; done
BFD_CHECK([p1], [false], [false], [none], [down], [Control Detection Time Expired], [none], [down], [No Diagnostic])
BFD_CHECK([p0], [false], [false], [none], [down], [Control Detection Time Expired], [none], [down], [No Diagnostic])

#Delete the added flow
AT_CHECK([ovs-ofctl del-flows br-sw], [0])
AT_CHECK([ovs-ofctl add-flow br-sw 'priority=0,actions=NORMAL'])
#Verify that BFD is back up again.
for i in `seq 0 40`; do ovs-appctl time/warp 100; done

BFD_CHECK([p1], [true], [false], [none], [up], [Control Detection Time Expired], [none], [up], [Control Detection Time Expired])
BFD_CHECK([p0], [true], [false], [none], [up], [Control Detection Time Expired], [none], [up], [Control Detection Time Expired])

#Now, Verify one-side tunnel down detection
#When br-sw is dropping packets from one end, BFD should detect
# that the tunnel is down, and come back up when br-sw is working fine.

#Bring down the br-bfd1 - br-sw link. So BFD packets will be sent from p0,
# but not received by p1. p0 will receive all BFD packets from p1.

AT_CHECK([ ovs-ofctl add-flow br-sw 'in_port=1,priority=5,actions=drop'])
for i in `seq 0 40`; do ovs-appctl time/warp 100; done
# Make sure p1 BFD state is down since it received no BFD packets.
BFD_CHECK([p1], [false], [false], [none], [down], [Control Detection Time Expired], [none], [down], [No Diagnostic])
for i in `seq 0 40`; do ovs-appctl time/warp 100; done
# p0 will be in init state once it receives "down" BFD message from p1.
BFD_CHECK([p0], [false], [false], [none], [init], [Neighbor Signaled Session Down], [none], [down], [Control Detection Time Expired])

AT_CHECK([ovs-ofctl del-flows br-sw])
AT_CHECK([ovs-ofctl add-flow br-sw 'priority=0,actions=NORMAL'])
#Ensure that BFD is back up again.

for i in `seq 0 10`; do ovs-appctl time/warp 100; done
#Bring down the br-bfd0 - br-sw link
AT_CHECK([ ovs-ofctl add-flow br-sw 'in_port=2,priority=5,actions=drop'])
for i in `seq 0 40`; do ovs-appctl time/warp 100; done
BFD_CHECK([p0], [false], [false], [none], [down], [Control Detection Time Expired], [none], [down], [No Diagnostic])
for i in `seq 0 40`; do ovs-appctl time/warp 100; done
BFD_CHECK([p1], [false], [false], [none], [init], [Neighbor Signaled Session Down], [none], [down], [Control Detection Time Expired])
OVS_VSWITCHD_STOP
AT_CLEANUP


AT_SETUP([bfd - concatenated path down])
#Create 2 bridges connected by patch ports and enable BFD
OVS_VSWITCHD_START()
ovs-appctl time/stop
AT_CHECK([ ovs-vsctl -- add-br br1 -- \
           set bridge br1 datapath-type=dummy \
           other-config:hwaddr=aa:55:aa:56:00:00 ])
AT_CHECK([ ovs-vsctl -- add-port br1 p1 -- set Interface p1 type=patch \
           options:peer=p0 ])
AT_CHECK([ ovs-vsctl -- add-port br0 p0 -- set Interface p0 type=patch \
           options:peer=p1 ])
AT_CHECK([ ovs-vsctl -- set interface p0 bfd:enable=true ])
AT_CHECK([ ovs-vsctl -- set interface p1 bfd:enable=true ])
for i in `seq 0 40`; do ovs-appctl time/warp 100; done

#Verify that BFD has been enabled on both interfaces.
BFD_CHECK([p1], [true], [false], [none], [up], [No Diagnostic], [none], [up], [No Diagnostic])
BFD_CHECK([p0], [true], [false], [none], [up], [No Diagnostic], [none], [up], [No Diagnostic])

#Set cpath_down to true on one interface, make sure the remote interface updates its values.
AT_CHECK([ovs-vsctl set interface p0 bfd:cpath_down=true])
for i in `seq 0 40`; do ovs-appctl time/warp 100; done
BFD_CHECK([p1], [false], [false], [none], [up], [No Diagnostic], [none], [up], [Concatenated Path Down])
OVS_VSWITCHD_STOP
AT_CLEANUP


AT_SETUP([bfd - Edit the Min Tx/Rx values])
#Create 2 bridges connected by patch ports and enable BFD
OVS_VSWITCHD_START()
ovs-appctl time/stop
AT_CHECK([ ovs-vsctl -- add-br br1 -- \
           set bridge br1 datapath-type=dummy ])
AT_CHECK([ ovs-vsctl -- add-port br1 p1 -- set Interface p1 type=patch \
           options:peer=p0 ])
AT_CHECK([ ovs-vsctl -- add-port br0 p0 -- set Interface p0 type=patch \
           options:peer=p1 ])
AT_CHECK([ ovs-vsctl -- set interface p0 bfd:enable=true ])
AT_CHECK([ ovs-vsctl -- set interface p1 bfd:enable=true ])
for i in `seq 0 30`; do ovs-appctl time/warp 100; done
#Verify that BFD has been enabled on both interfaces.
BFD_CHECK([p1], [true], [false], [none], [up], [No Diagnostic], [none], [up], [No Diagnostic])
BFD_CHECK([p0], [true], [false], [none], [up], [No Diagnostic], [none], [up], [No Diagnostic])
#Edit the min Tx value.
AT_CHECK([ovs-vsctl set interface p0 bfd:min_tx=200])
for i in `seq 0 20`; do ovs-appctl time/warp 100; done
BFD_CHECK_TX([p0], [200ms], [100ms])
BFD_CHECK_TX([p1], [100ms], [200ms])

#Edit the min Rx value.
AT_CHECK([ovs-vsctl set interface p1 bfd:min_rx=300])
for i in `seq 0 20`; do ovs-appctl time/warp 100; done
BFD_CHECK_RX([p1], [300ms], [1000ms])
BFD_CHECK_RX([p0], [1000ms], [300ms])

OVS_VSWITCHD_STOP
AT_CLEANUP