def flow_add(self, mod):
assert isinstance(mod, ofp.ofp_flow_mod)
assert mod.cookie_mask == 0
# read from model
flows = list(self.flows_proxy.get('/').items)
changed = False
check_overlap = mod.flags & ofp.OFPFF_CHECK_OVERLAP
if check_overlap:
if self.find_overlapping_flows(flows, mod, True):
self.signal_flow_mod_error(
ofp.OFPFMFC_OVERLAP, mod)
else:
# free to add as new flow
flow = flow_stats_entry_from_flow_mod_message(mod)
flows.append(flow)
changed = True
self.log.debug('flow-added', flow=mod)
else:
flow = flow_stats_entry_from_flow_mod_message(mod)
idx = self.find_flow(flows, flow)
if idx >= 0:
old_flow = flows[idx]
if not (mod.flags & ofp.OFPFF_RESET_COUNTS):
flow.byte_count = old_flow.byte_count
flow.packet_count = old_flow.packet_count
flows[idx] = flow
changed = True
self.log.debug('flow-updated', flow=flow)
else:
flows.append(flow)
changed = True
self.log.debug('flow-added', flow=mod)
# write back to model
if changed:
self.flows_proxy.update('/', Flows(items=flows))
def flow_add(self, mod):
assert isinstance(mod, ofp.ofp_flow_mod)
assert mod.cookie_mask == 0
# read from model
flows = list(self.flows_proxy.get('/').items)
changed = False
check_overlap = mod.flags & ofp.OFPFF_CHECK_OVERLAP
if check_overlap:
if self.find_overlapping_flows(flows, mod, True):
self.signal_flow_mod_error(
ofp.OFPFMFC_OVERLAP, mod)
else:
# free to add as new flow
flow = flow_stats_entry_from_flow_mod_message(mod)
flows.append(flow)
changed = True
self.log.debug('flow-added', flow=mod)
else:
flow = flow_stats_entry_from_flow_mod_message(mod)
idx = self.find_flow(flows, flow)
if idx >= 0:
old_flow = flows[idx]
if not (mod.flags & ofp.OFPFF_RESET_COUNTS):
flow.byte_count = old_flow.byte_count
flow.packet_count = old_flow.packet_count
flows[idx] = flow
changed = True
self.log.debug('flow-updated', flow=flow)
else:
flows.append(flow)
changed = True
self.log.debug('flow-added', flow=mod)
# write back to model
if changed:
self.flows_proxy.update('/', Flows(items=flows))
def flow_delete_strict(self, mod):
assert isinstance(mod, ofp.ofp_flow_mod)
# read from model
flows = list(self.flows_proxy.get('/').items)
changed = False
flow = flow_stats_entry_from_flow_mod_message(mod)
idx = self.find_flow(flows, flow)
if (idx >= 0):
del flows[idx]
changed = True
else:
# TODO need to check what to do with this case
self.log.warn('flow-cannot-delete', flow=flow)
if changed:
self.flows_proxy.update('/', Flows(items=flows))
def flow_delete_strict(self, mod):
assert isinstance(mod, ofp.ofp_flow_mod)
# read from model
flows = list(self.flows_proxy.get('/').items)
changed = False
flow = flow_stats_entry_from_flow_mod_message(mod)
idx = self.find_flow(flows, flow)
if (idx >= 0):
del flows[idx]
changed = True
else:
# TODO need to check what to do with this case
self.log.warn('flow-cannot-delete', flow=flow)
if changed:
self.flows_proxy.update('/', Flows(items=flows))
