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reconnect.at
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reconnect.at
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AT_BANNER([reconnect library])
m4_define([__RECONNECT_CHECK],
[AT_SETUP([$1])
$2
AT_KEYWORDS([reconnect])
AT_DATA([input], [$3])
AT_CHECK([$4], [0], [$5])
AT_CLEANUP])
m4_define([RECONNECT_CHECK],
[__RECONNECT_CHECK(
[$1 - C],
[],
[$2],
[ovstest test-reconnect < input],
[$3])
__RECONNECT_CHECK(
[$1 - Python2],
[AT_SKIP_IF([test $HAVE_PYTHON = no])],
[$2],
[$PYTHON $srcdir/test-reconnect.py < input],
[$3])
__RECONNECT_CHECK(
[$1 - Python3],
[AT_SKIP_IF([test $HAVE_PYTHON3 = no])],
[$2],
[$PYTHON3 $srcdir/test-reconnect.py < input],
[$3])])
######################################################################
RECONNECT_CHECK([nothing happens if not enabled],
[run
timeout
],
[### t=1000 ###
run
timeout
no timeout
])
######################################################################
RECONNECT_CHECK([quick connect, idle disconnect],
[enable
# Connection succeeds.
run
connected
# Send inactivity probe.
timeout
run
# Idle timeout kills connection.
timeout
run
disconnected
],
[### t=1000 ###
enable
in BACKOFF for 0 ms (0 ms backoff)
# Connection succeeds.
run
should connect
connected
in ACTIVE for 0 ms (0 ms backoff)
created 1000, last activity 1000, last connected 1000
1 successful connections out of 1 attempts, seqno 1
connected
last connected 0 ms ago, connected 0 ms total
# Send inactivity probe.
timeout
advance 5000 ms
### t=6000 ###
in ACTIVE for 5000 ms (0 ms backoff)
run
should send probe
in IDLE for 0 ms (0 ms backoff)
# Idle timeout kills connection.
timeout
advance 5000 ms
### t=11000 ###
in IDLE for 5000 ms (0 ms backoff)
run
should disconnect
disconnected
in BACKOFF for 0 ms (1000 ms backoff)
1 successful connections out of 1 attempts, seqno 2
disconnected
disconnected at 11000 ms (0 ms ago)
])
######################################################################
RECONNECT_CHECK([slow connect, idle disconnect],
[enable
# Start connecting.
run
connecting
# Connect after 500 ms.
advance 500
run
connected
# Send inactivity probe.
timeout
run
# Idle timeout kills connection.
timeout
run
disconnected
],
[### t=1000 ###
enable
in BACKOFF for 0 ms (0 ms backoff)
# Start connecting.
run
should connect
connecting
in CONNECTING for 0 ms (0 ms backoff)
# Connect after 500 ms.
advance 500
### t=1500 ###
in CONNECTING for 500 ms (0 ms backoff)
run
connected
in ACTIVE for 0 ms (0 ms backoff)
created 1000, last activity 1000, last connected 1500
1 successful connections out of 1 attempts, seqno 1
connected
last connected 0 ms ago, connected 0 ms total
# Send inactivity probe.
timeout
advance 5000 ms
### t=6500 ###
in ACTIVE for 5000 ms (0 ms backoff)
run
should send probe
in IDLE for 0 ms (0 ms backoff)
# Idle timeout kills connection.
timeout
advance 5000 ms
### t=11500 ###
in IDLE for 5000 ms (0 ms backoff)
run
should disconnect
disconnected
in BACKOFF for 0 ms (1000 ms backoff)
1 successful connections out of 1 attempts, seqno 2
disconnected
disconnected at 11500 ms (0 ms ago)
])
######################################################################
RECONNECT_CHECK([connect backs off],
[enable
# First connection attempt fails after 1000 ms.
run
connecting
run
timeout
run
connect-failed
# Back off for 1000 ms.
timeout
run
# Second connection attempt fails after 1000 ms.
connecting
timeout
run
connect-failed
# Back off for 2000 ms.
timeout
run
# Third connection attempt fails after 2000 ms.
connecting
timeout
run
connect-failed
# Back off for 4000 ms.
timeout
run
# Third connection attempt fails after 4000 ms.
connecting
timeout
run
connect-failed
# Back off for 8000 ms.
timeout
run
# Third connection attempt fails after 8000 ms.
connecting
timeout
run
connect-failed
# Back off for 8000 ms.
timeout
run
# Fourth connection attempt fails after 8000 ms.
connecting
timeout
run
connect-failed
],
[### t=1000 ###
enable
in BACKOFF for 0 ms (0 ms backoff)
# First connection attempt fails after 1000 ms.
run
should connect
connecting
in CONNECTING for 0 ms (0 ms backoff)
run
timeout
advance 1000 ms
### t=2000 ###
in CONNECTING for 1000 ms (0 ms backoff)
run
should disconnect
connect-failed
in BACKOFF for 0 ms (1000 ms backoff)
0 successful connections out of 1 attempts, seqno 0
# Back off for 1000 ms.
timeout
advance 1000 ms
### t=3000 ###
in BACKOFF for 1000 ms (1000 ms backoff)
run
should connect
# Second connection attempt fails after 1000 ms.
connecting
in CONNECTING for 0 ms (1000 ms backoff)
timeout
advance 1000 ms
### t=4000 ###
in CONNECTING for 1000 ms (1000 ms backoff)
run
should disconnect
connect-failed
in BACKOFF for 0 ms (2000 ms backoff)
0 successful connections out of 2 attempts, seqno 0
# Back off for 2000 ms.
timeout
advance 2000 ms
### t=6000 ###
in BACKOFF for 2000 ms (2000 ms backoff)
run
should connect
# Third connection attempt fails after 2000 ms.
connecting
in CONNECTING for 0 ms (2000 ms backoff)
timeout
advance 2000 ms
### t=8000 ###
in CONNECTING for 2000 ms (2000 ms backoff)
run
should disconnect
connect-failed
in BACKOFF for 0 ms (4000 ms backoff)
0 successful connections out of 3 attempts, seqno 0
# Back off for 4000 ms.
timeout
advance 4000 ms
### t=12000 ###
in BACKOFF for 4000 ms (4000 ms backoff)
run
should connect
# Third connection attempt fails after 4000 ms.
connecting
in CONNECTING for 0 ms (4000 ms backoff)
timeout
advance 4000 ms
### t=16000 ###
in CONNECTING for 4000 ms (4000 ms backoff)
run
should disconnect
connect-failed
in BACKOFF for 0 ms (8000 ms backoff)
0 successful connections out of 4 attempts, seqno 0
# Back off for 8000 ms.
timeout
advance 8000 ms
### t=24000 ###
in BACKOFF for 8000 ms (8000 ms backoff)
run
should connect
# Third connection attempt fails after 8000 ms.
connecting
in CONNECTING for 0 ms (8000 ms backoff)
timeout
advance 8000 ms
### t=32000 ###
in CONNECTING for 8000 ms (8000 ms backoff)
run
should disconnect
connect-failed
in BACKOFF for 0 ms (8000 ms backoff)
0 successful connections out of 5 attempts, seqno 0
# Back off for 8000 ms.
timeout
advance 8000 ms
### t=40000 ###
in BACKOFF for 8000 ms (8000 ms backoff)
run
should connect
# Fourth connection attempt fails after 8000 ms.
connecting
in CONNECTING for 0 ms (8000 ms backoff)
timeout
advance 8000 ms
### t=48000 ###
in CONNECTING for 8000 ms (8000 ms backoff)
run
should disconnect
connect-failed
in BACKOFF for 0 ms (8000 ms backoff)
0 successful connections out of 6 attempts, seqno 0
])
######################################################################
RECONNECT_CHECK([connections with no data preserve backoff],
[enable
# First connect, then idle timeout kills connection.
run
connected
timeout
run
timeout
run
disconnected
# Back off for 1000 ms.
timeout
run
# Second connect, then idle timeout kills connection.
run
connected
timeout
run
timeout
run
disconnected
# Back off for 2000 ms.
timeout
run
# Third connect, then idle timeout kills connection.
run
connected
timeout
run
timeout
run
disconnected
# Back off for 4000 ms.
timeout
], [### t=1000 ###
enable
in BACKOFF for 0 ms (0 ms backoff)
# First connect, then idle timeout kills connection.
run
should connect
connected
in ACTIVE for 0 ms (0 ms backoff)
created 1000, last activity 1000, last connected 1000
1 successful connections out of 1 attempts, seqno 1
connected
last connected 0 ms ago, connected 0 ms total
timeout
advance 5000 ms
### t=6000 ###
in ACTIVE for 5000 ms (0 ms backoff)
run
should send probe
in IDLE for 0 ms (0 ms backoff)
timeout
advance 5000 ms
### t=11000 ###
in IDLE for 5000 ms (0 ms backoff)
run
should disconnect
disconnected
in BACKOFF for 0 ms (1000 ms backoff)
1 successful connections out of 1 attempts, seqno 2
disconnected
disconnected at 11000 ms (0 ms ago)
# Back off for 1000 ms.
timeout
advance 1000 ms
### t=12000 ###
in BACKOFF for 1000 ms (1000 ms backoff)
last connected 11000 ms ago, connected 10000 ms total
run
should connect
# Second connect, then idle timeout kills connection.
run
should connect
connected
in ACTIVE for 0 ms (1000 ms backoff)
created 1000, last activity 1000, last connected 12000
2 successful connections out of 2 attempts, seqno 3
connected
last connected 0 ms ago, connected 10000 ms total
timeout
advance 5000 ms
### t=17000 ###
in ACTIVE for 5000 ms (1000 ms backoff)
run
should send probe
in IDLE for 0 ms (1000 ms backoff)
timeout
advance 5000 ms
### t=22000 ###
in IDLE for 5000 ms (1000 ms backoff)
run
should disconnect
disconnected
in BACKOFF for 0 ms (2000 ms backoff)
2 successful connections out of 2 attempts, seqno 4
disconnected
disconnected at 22000 ms (0 ms ago)
# Back off for 2000 ms.
timeout
advance 2000 ms
### t=24000 ###
in BACKOFF for 2000 ms (2000 ms backoff)
last connected 12000 ms ago, connected 20000 ms total
run
should connect
# Third connect, then idle timeout kills connection.
run
should connect
connected
in ACTIVE for 0 ms (2000 ms backoff)
created 1000, last activity 1000, last connected 24000
3 successful connections out of 3 attempts, seqno 5
connected
last connected 0 ms ago, connected 20000 ms total
timeout
advance 5000 ms
### t=29000 ###
in ACTIVE for 5000 ms (2000 ms backoff)
run
should send probe
in IDLE for 0 ms (2000 ms backoff)
timeout
advance 5000 ms
### t=34000 ###
in IDLE for 5000 ms (2000 ms backoff)
run
should disconnect
disconnected
in BACKOFF for 0 ms (4000 ms backoff)
3 successful connections out of 3 attempts, seqno 6
disconnected
disconnected at 34000 ms (0 ms ago)
# Back off for 4000 ms.
timeout
advance 4000 ms
### t=38000 ###
in BACKOFF for 4000 ms (4000 ms backoff)
last connected 14000 ms ago, connected 30000 ms total
])
######################################################################
RECONNECT_CHECK([brief connection preserves backoff],
[enable
# First connection attempt fails after 1000 ms.
run
connecting
run
timeout
run
connect-failed
# Back off for 1000 ms.
timeout
run
# Second connection attempt fails after 1000 ms.
connecting
timeout
run
connect-failed
# Back off for 2000 ms.
timeout
run
# Third connection attempt succeeds after 500 ms.
connecting
advance 500
run
connected
# Connection drops after another 250 ms.
advance 250
disconnected
run
# Back off for 4000 ms.
timeout
run
], [### t=1000 ###
enable
in BACKOFF for 0 ms (0 ms backoff)
# First connection attempt fails after 1000 ms.
run
should connect
connecting
in CONNECTING for 0 ms (0 ms backoff)
run
timeout
advance 1000 ms
### t=2000 ###
in CONNECTING for 1000 ms (0 ms backoff)
run
should disconnect
connect-failed
in BACKOFF for 0 ms (1000 ms backoff)
0 successful connections out of 1 attempts, seqno 0
# Back off for 1000 ms.
timeout
advance 1000 ms
### t=3000 ###
in BACKOFF for 1000 ms (1000 ms backoff)
run
should connect
# Second connection attempt fails after 1000 ms.
connecting
in CONNECTING for 0 ms (1000 ms backoff)
timeout
advance 1000 ms
### t=4000 ###
in CONNECTING for 1000 ms (1000 ms backoff)
run
should disconnect
connect-failed
in BACKOFF for 0 ms (2000 ms backoff)
0 successful connections out of 2 attempts, seqno 0
# Back off for 2000 ms.
timeout
advance 2000 ms
### t=6000 ###
in BACKOFF for 2000 ms (2000 ms backoff)
run
should connect
# Third connection attempt succeeds after 500 ms.
connecting
in CONNECTING for 0 ms (2000 ms backoff)
advance 500
### t=6500 ###
in CONNECTING for 500 ms (2000 ms backoff)
run
connected
in ACTIVE for 0 ms (2000 ms backoff)
created 1000, last activity 1000, last connected 6500
1 successful connections out of 3 attempts, seqno 1
connected
last connected 0 ms ago, connected 0 ms total
# Connection drops after another 250 ms.
advance 250
### t=6750 ###
in ACTIVE for 250 ms (2000 ms backoff)
disconnected
in BACKOFF for 0 ms (4000 ms backoff)
1 successful connections out of 3 attempts, seqno 2
disconnected
disconnected at 6750 ms (0 ms ago)
run
# Back off for 4000 ms.
timeout
advance 4000 ms
### t=10750 ###
in BACKOFF for 4000 ms (4000 ms backoff)
last connected 4250 ms ago, connected 250 ms total
run
should connect
])
######################################################################
RECONNECT_CHECK([brief connection with data preserves backoff],
[enable
# First connection attempt fails after 1000 ms.
run
connecting
run
timeout
run
connect-failed
# Back off for 1000 ms.
timeout
run
# Second connection attempt fails after 1000 ms.
connecting
timeout
run
connect-failed
# Back off for 2000 ms.
timeout
run
# Third connection attempt succeeds after 500 ms.
connecting
advance 500
run
connected
# Connection receives 3 chunks of data spaced 250 ms apart.
advance 250
run
activity
advance 250
run
activity
advance 250
run
activity
# Connection drops.
disconnected
run
# Back off for 4000 ms.
timeout
run
],
[### t=1000 ###
enable
in BACKOFF for 0 ms (0 ms backoff)
# First connection attempt fails after 1000 ms.
run
should connect
connecting
in CONNECTING for 0 ms (0 ms backoff)
run
timeout
advance 1000 ms
### t=2000 ###
in CONNECTING for 1000 ms (0 ms backoff)
run
should disconnect
connect-failed
in BACKOFF for 0 ms (1000 ms backoff)
0 successful connections out of 1 attempts, seqno 0
# Back off for 1000 ms.
timeout
advance 1000 ms
### t=3000 ###
in BACKOFF for 1000 ms (1000 ms backoff)
run
should connect
# Second connection attempt fails after 1000 ms.
connecting
in CONNECTING for 0 ms (1000 ms backoff)
timeout
advance 1000 ms
### t=4000 ###
in CONNECTING for 1000 ms (1000 ms backoff)
run
should disconnect
connect-failed
in BACKOFF for 0 ms (2000 ms backoff)
0 successful connections out of 2 attempts, seqno 0
# Back off for 2000 ms.
timeout
advance 2000 ms
### t=6000 ###
in BACKOFF for 2000 ms (2000 ms backoff)
run
should connect
# Third connection attempt succeeds after 500 ms.
connecting
in CONNECTING for 0 ms (2000 ms backoff)
advance 500
### t=6500 ###
in CONNECTING for 500 ms (2000 ms backoff)
run
connected
in ACTIVE for 0 ms (2000 ms backoff)
created 1000, last activity 1000, last connected 6500
1 successful connections out of 3 attempts, seqno 1
connected
last connected 0 ms ago, connected 0 ms total
# Connection receives 3 chunks of data spaced 250 ms apart.
advance 250
### t=6750 ###
in ACTIVE for 250 ms (2000 ms backoff)
run
activity
created 1000, last activity 6750, last connected 6500
advance 250
### t=7000 ###
in ACTIVE for 500 ms (2000 ms backoff)
run
activity
created 1000, last activity 7000, last connected 6500
advance 250
### t=7250 ###
in ACTIVE for 750 ms (2000 ms backoff)
run
activity
created 1000, last activity 7250, last connected 6500
# Connection drops.
disconnected
in BACKOFF for 0 ms (4000 ms backoff)
1 successful connections out of 3 attempts, seqno 2
disconnected
disconnected at 7250 ms (0 ms ago)
run
# Back off for 4000 ms.
timeout
advance 4000 ms
### t=11250 ###
in BACKOFF for 4000 ms (4000 ms backoff)
last connected 4750 ms ago, connected 750 ms total
run
should connect
])
######################################################################
RECONNECT_CHECK([long connection resets backoff],
[enable
# First connection attempt fails after 1000 ms.
run
connecting
run
timeout
run
connect-failed
# Back off for 1000 ms.
timeout
run
# Second connection attempt fails after 1000 ms.
connecting
timeout
run
connect-failed
# Back off for 2000 ms.
timeout
run
# Third connection attempt succeeds after 500 ms.
connecting
advance 500
run
connected
# Connection receives 3 chunks of data spaced 2000 ms apart.
advance 2000
run
activity
advance 2000
run
activity
advance 2000
run
activity
# Connection drops.
disconnected
run
# Back off for 1000 ms.
timeout
run
],
[### t=1000 ###
enable
in BACKOFF for 0 ms (0 ms backoff)
# First connection attempt fails after 1000 ms.
run
should connect
connecting
in CONNECTING for 0 ms (0 ms backoff)
run
timeout
advance 1000 ms
### t=2000 ###
in CONNECTING for 1000 ms (0 ms backoff)
run
should disconnect
connect-failed
in BACKOFF for 0 ms (1000 ms backoff)
0 successful connections out of 1 attempts, seqno 0
# Back off for 1000 ms.
timeout
advance 1000 ms
### t=3000 ###
in BACKOFF for 1000 ms (1000 ms backoff)
run
should connect
# Second connection attempt fails after 1000 ms.
connecting
in CONNECTING for 0 ms (1000 ms backoff)
timeout
advance 1000 ms
### t=4000 ###
in CONNECTING for 1000 ms (1000 ms backoff)
run
should disconnect
connect-failed
in BACKOFF for 0 ms (2000 ms backoff)
0 successful connections out of 2 attempts, seqno 0
# Back off for 2000 ms.
timeout
advance 2000 ms
### t=6000 ###
in BACKOFF for 2000 ms (2000 ms backoff)
run
should connect
# Third connection attempt succeeds after 500 ms.
connecting
in CONNECTING for 0 ms (2000 ms backoff)
advance 500
### t=6500 ###
in CONNECTING for 500 ms (2000 ms backoff)
run
connected
in ACTIVE for 0 ms (2000 ms backoff)
created 1000, last activity 1000, last connected 6500
1 successful connections out of 3 attempts, seqno 1
connected
last connected 0 ms ago, connected 0 ms total
# Connection receives 3 chunks of data spaced 2000 ms apart.
advance 2000
### t=8500 ###
in ACTIVE for 2000 ms (2000 ms backoff)
run
activity
created 1000, last activity 8500, last connected 6500
advance 2000
### t=10500 ###
in ACTIVE for 4000 ms (2000 ms backoff)
run
activity
created 1000, last activity 10500, last connected 6500
advance 2000
### t=12500 ###
in ACTIVE for 6000 ms (2000 ms backoff)
run
activity
created 1000, last activity 12500, last connected 6500
# Connection drops.
disconnected
in BACKOFF for 0 ms (1000 ms backoff)
1 successful connections out of 3 attempts, seqno 2
disconnected
disconnected at 12500 ms (0 ms ago)
run
# Back off for 1000 ms.
timeout
advance 1000 ms
### t=13500 ###
in BACKOFF for 1000 ms (1000 ms backoff)
last connected 7000 ms ago, connected 6000 ms total
run
should connect
])
######################################################################
RECONNECT_CHECK([connection attempt fails quickly],
[enable
# Connection fails quickly.
run
connect-failed ECONNREFUSED
# Back off for 1000 ms.
run
timeout
# Connection fails quickly again.
run
connect-failed ECONNREFUSED
# Back off for 2000 ms.