tests/test-reconnect.py

   1 # Copyright (c) 2009, 2010, 2012 Nicira, Inc.
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at:
   6 #
   7 #     http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14
  15 from __future__ import print_function
  16
  17 import errno
  18 import sys
  19
  20 import ovs.reconnect
  21
  22 now = 0
  23 r = None
  24
  25
  26 def do_enable(_):
  27     r.enable(now)
  28
  29
  30 def do_disable(_):
  31     r.disable(now)
  32
  33
  34 def do_force_reconnect(_):
  35     r.force_reconnect(now)
  36
  37
  38 def error_from_string(s):
  39     if not s:
  40         return 0
  41     elif s == "ECONNREFUSED":
  42         return errno.ECONNREFUSED
  43     elif s == "EOF":
  44         return ovs.reconnect.EOF
  45     else:
  46         sys.stderr.write("unknown error '%s'\n" % s)
  47         sys.exit(1)
  48
  49
  50 def do_disconnected(arg):
  51     r.disconnected(now, error_from_string(arg))
  52
  53
  54 def do_connecting(_):
  55     r.connecting(now)
  56
  57
  58 def do_connect_failed(arg):
  59     r.connect_failed(now, error_from_string(arg))
  60
  61
  62 def do_connected(_):
  63     r.connected(now)
  64
  65
  66 def do_activity(_):
  67     r.activity(now)
  68
  69
  70 def do_run(arg):
  71     global now
  72     if arg is not None:
  73         now += int(arg)
  74
  75     action = r.run(now)
  76     if action is None:
  77         pass
  78     elif action == ovs.reconnect.CONNECT:
  79         print("  should connect")
  80     elif action == ovs.reconnect.DISCONNECT:
  81         print("  should disconnect")
  82     elif action == ovs.reconnect.PROBE:
  83         print("  should send probe")
  84     else:
  85         assert False
  86
  87
  88 def do_advance(arg):
  89     global now
  90     now += int(arg)
  91
  92
  93 def do_timeout(_):
  94     global now
  95     timeout = r.timeout(now)
  96     if timeout is not None and timeout >= 0:
  97         print("  advance %d ms" % timeout)
  98         now += timeout
  99     else:
 100         print("  no timeout")
 101
 102
 103 def do_set_max_tries(arg):
 104     r.set_max_tries(int(arg))
 105
 106
 107 def diff_stats(old, new, delta):
 108     if (old.state != new.state or
 109         old.state_elapsed != new.state_elapsed or
 110         old.backoff != new.backoff):
 111         print("  in %s for %d ms (%d ms backoff)"
 112               % (new.state, new.state_elapsed, new.backoff))
 113
 114     if (old.creation_time != new.creation_time or
 115         old.last_activity != new.last_activity or
 116         old.last_connected != new.last_connected):
 117         print("  created %d, last activity %d, last connected %d"
 118               % (new.creation_time, new.last_activity, new.last_connected))
 119
 120     if (old.n_successful_connections != new.n_successful_connections or
 121         old.n_attempted_connections != new.n_attempted_connections or
 122         old.seqno != new.seqno):
 123         print("  %d successful connections out of %d attempts, seqno %d"
 124               % (new.n_successful_connections, new.n_attempted_connections,
 125                  new.seqno))
 126
 127     if (old.is_connected != new.is_connected):
 128         if new.is_connected:
 129             negate = ""
 130         else:
 131             negate = "dis"
 132         print("  %sconnected" % negate)
 133
 134     if (old.last_connected != new.last_connected or
 135         (new.msec_since_connect is not None and
 136          old.msec_since_connect != new.msec_since_connect - delta) or
 137         (old.total_connected_duration != new.total_connected_duration - delta
 138             and not (old.total_connected_duration == 0 and
 139                 new.total_connected_duration == 0))):
 140         print("  last connected %d ms ago, connected %d ms total"
 141               % (new.msec_since_connect, new.total_connected_duration))
 142
 143     if (old.last_disconnected != new.last_disconnected or
 144         (new.msec_since_disconnect is not None and
 145          old.msec_since_disconnect != new.msec_since_disconnect - delta)):
 146         print("  disconnected at %d ms (%d ms ago)"
 147               % (new.last_disconnected, new.msec_since_disconnect))
 148
 149
 150 def do_set_passive(_):
 151     r.set_passive(True, now)
 152
 153
 154 def do_listening(_):
 155     r.listening(now)
 156
 157
 158 def do_listen_error(arg):
 159     r.listen_error(now, int(arg))
 160
 161
 162 def main():
 163     commands = {
 164         "enable": do_enable,
 165         "disable": do_disable,
 166         "force-reconnect": do_force_reconnect,
 167         "disconnected": do_disconnected,
 168         "connecting": do_connecting,
 169         "connect-failed": do_connect_failed,
 170         "connected": do_connected,
 171         "activity": do_activity,
 172         "run": do_run,
 173         "advance": do_advance,
 174         "timeout": do_timeout,
 175         "set-max-tries": do_set_max_tries,
 176         "passive": do_set_passive,
 177         "listening": do_listening,
 178         "listen-error": do_listen_error
 179     }
 180
 181     global now
 182     global r
 183
 184     now = 1000
 185     r = ovs.reconnect.Reconnect(now)
 186     r.set_name("remote")
 187     prev = r.get_stats(now)
 188     print("### t=%d ###" % now)
 189     old_time = now
 190     old_max_tries = r.get_max_tries()
 191     while True:
 192         line = sys.stdin.readline()
 193         if line == "":
 194             break
 195
 196         print(line[:-1])
 197         if line[0] == "#":
 198             continue
 199
 200         args = line.split()
 201         if len(args) == 0:
 202             continue
 203
 204         command = args[0]
 205         if len(args) > 1:
 206             op = args[1]
 207         else:
 208             op = None
 209         commands[command](op)
 210
 211         if old_time != now:
 212             print()
 213             print("### t=%d ###" % now)
 214
 215         cur = r.get_stats(now)
 216         diff_stats(prev, cur, now - old_time)
 217         prev = cur
 218         if r.get_max_tries() != old_max_tries:
 219             old_max_tries = r.get_max_tries()
 220             print("  %d tries left" % old_max_tries)
 221
 222         old_time = now
 223
 224
 225 if __name__ == '__main__':
 226     main()