def next_step(self):
time.sleep(0.05)
self.logical_time += 1
self._forwarded_this_step = 0
if len(self.event_list) == 0:
msg.fail("No more events to inject")
return
next_event = self.event_list.pop(0)
if type(next_event) in InteractiveReplayer.supported_input_events:
msg.replay_event_success("Injecting %r" % next_event)
next_event.proceed(self.simulation)
else: # type(next_event) in InteractiveReplayer.supported_internal_events
if type(next_event) == ControlMessageReceive and is_flow_mod(
next_event):
msg.mcs_event("Injecting %r" % next_event)
else:
msg.replay_event_success("Injecting %r" % next_event)
next_event.manually_inject(self.simulation)
if self.show_flow_tables_each_step:
for switch in self.simulation.topology.switches:
print "Switch %s" % switch.dpid
switch.show_flow_table()
print "\nAdvanced to step %d\n" % self.logical_time
def simulate(self):
simulation = self.initialize_simulation()
# Some implementations send delete flow mods when disconnecting switches; ignore these flow_mods
if self.ignore_trailing_flow_mod_deletes:
# switch -> whether we have observed a flow_mod other than a trailing delete yet
dpid2seen_non_delete = { switch.dpid : False for switch in simulation.topology.switches }
# Reproduce the routing table state.
all_flow_mods = []
for next_event in self.event_list:
if is_flow_mod(next_event):
msg.special_event("Injecting %r" % next_event)
all_flow_mods.append(next_event)
else:
msg.openflow_event("Injecting %r" % next_event)
next_event.manually_inject(simulation)
# Now filter out all flow_mods that don't correspond to an entry in the
# final routing table. Do that by walking backwards through the flow_mods,
# and checking if they match the flow table. If so, add it to list, and
# remove all flow entries that currently match it to filter overlapping
# flow_mods from earlier in the event_list.
relevant_flow_mods = []
for last_event in reversed(all_flow_mods):
switch = simulation.topology.get_switch(last_event.dpid)
# Ignore all trailing flow mod deletes
if self.ignore_trailing_flow_mod_deletes:
flow_mod_command = last_event.get_packet().command
if (not dpid2seen_non_delete[switch.dpid] and
(flow_mod_command == OFPFC_DELETE or flow_mod_command == OFPFC_DELETE_STRICT)):
continue
else:
dpid2seen_non_delete[switch.dpid] = True
if switch.table.matching_entries(last_event.get_packet().match) != []:
relevant_flow_mods.append(last_event)
switch.table.remove_matching_entries(last_event.get_packet().match)
relevant_flow_mods.reverse()
# Print filtered flow mods
print "\n"
msg.event("Filtered flow mods:")
for next_event in relevant_flow_mods:
print "%r" % next_event
print "\n"
# Add back removed entries.
for flow_mod_event in relevant_flow_mods:
flow_mod_event.manually_inject(simulation)
# Now print flow tables of each switch.
msg.event("Flow tables:")
for switch in simulation.topology.switches:
print "Switch %s" % switch.dpid
switch.show_flow_table()
return simulation
def next_step(self):
time.sleep(0.05)
self.logical_time += 1
self._forwarded_this_step = 0
if len(self.event_list) == 0:
msg.fail("No more events to inject")
else:
next_event = self.event_list.pop(0)
if type(next_event) in InteractiveReplayer.supported_input_events:
msg.replay_event_success("Injecting %r" % next_event)
next_event.proceed(self.simulation)
else: # type(next_event) in InteractiveReplayer.supported_internal_events
if type(next_event) == ControlMessageReceive and is_flow_mod(next_event):
msg.mcs_event("Injecting %r" % next_event)
else:
msg.replay_event_success("Injecting %r" % next_event)
next_event.manually_inject(self.simulation)
if self.show_flow_tables_each_step:
for switch in self.simulation.topology.switches:
print "Switch %s" % switch.dpid
switch.show_flow_table()
print "\nAdvanced to step %d\n" % self.logical_time
def _poll_event(self, event, end_time):
proceed = False
while True:
now = time.time()
if event.proceed(self.simulation):
proceed = True
break
elif now > end_time:
break
self.simulation.io_master.select(self.sleep_interval_seconds)
if proceed:
event.timed_out = False
self.stats.event_matched(event)
self.update_event_time(event)
if self.show_flow_tables and\
type(event) == ControlMessageReceive and\
is_flow_mod(event):
for switch in self.simulation.topology.switches:
msg.interactive("Switch %s" % switch.dpid)
switch.show_flow_table()
else:
event.timed_out = True
self.stats.event_timed_out(event)
event.replay_time = SyncTime.now()
def simulate(self):
simulation = self.initialize_simulation()
# Some implementations send delete flow mods when disconnecting switches; ignore these flow_mods
if self.ignore_trailing_flow_mod_deletes:
# switch -> whether we have observed a flow_mod other than a trailing delete yet
dpid2seen_non_delete = {
switch.dpid: False
for switch in simulation.topology.switches
}
# Reproduce the routing table state.
all_flow_mods = []
for next_event in self.event_list:
if is_flow_mod(next_event):
msg.special_event("Injecting %r" % next_event)
all_flow_mods.append(next_event)
else:
msg.openflow_event("Injecting %r" % next_event)
next_event.manually_inject(simulation)
# Now filter out all flow_mods that don't correspond to an entry in the
# final routing table. Do that by walking backwards through the flow_mods,
# and checking if they match the flow table. If so, add it to list, and
# remove all flow entries that currently match it to filter overlapping
# flow_mods from earlier in the event_list.
relevant_flow_mods = []
for last_event in reversed(all_flow_mods):
switch = simulation.topology.get_switch(last_event.dpid)
# Ignore all trailing flow mod deletes
if self.ignore_trailing_flow_mod_deletes:
flow_mod_command = last_event.get_packet().command
if (not dpid2seen_non_delete[switch.dpid]
and (flow_mod_command == OFPFC_DELETE
or flow_mod_command == OFPFC_DELETE_STRICT)):
continue
else:
dpid2seen_non_delete[switch.dpid] = True
if switch.table.matching_entries(
last_event.get_packet().match) != []:
relevant_flow_mods.append(last_event)
switch.table.remove_matching_entries(
last_event.get_packet().match)
relevant_flow_mods.reverse()
# Print filtered flow mods
print "\n"
msg.event("Filtered flow mods:")
for next_event in relevant_flow_mods:
print "%r" % next_event
print "\n"
# Add back removed entries.
for flow_mod_event in relevant_flow_mods:
flow_mod_event.manually_inject(simulation)
# Now print flow tables of each switch.
msg.event("Flow tables:")
for switch in simulation.topology.switches:
print "Switch %s" % switch.dpid
switch.show_flow_table()
return simulation
