def state_change_handler(self, ev):
dp = ev.datapath
assert dp is not None
LOG.debug(dp)
if ev.state == MAIN_DISPATCHER:
self._register(dp)
switch = self._get_switch(dp.id)
LOG.debug('register %s', switch)
self.send_event_to_observers(event.EventSwitchEnter(switch))
if not self.link_discovery:
return
if self.install_flow:
ofproto = dp.ofproto
ofproto_parser = dp.ofproto_parser
# TODO:XXX need other versions
if ofproto.OFP_VERSION == ofproto_v1_0.OFP_VERSION:
rule = nx_match.ClsRule()
rule.set_dl_dst(
addrconv.mac.text_to_bin(lldp.LLDP_MAC_NEAREST_BRIDGE))
rule.set_dl_type(ETH_TYPE_LLDP)
actions = [
ofproto_parser.OFPActionOutput(ofproto.OFPP_CONTROLLER,
self.LLDP_PACKET_LEN)
]
dp.send_flow_mod(rule=rule,
cookie=0,
command=ofproto.OFPFC_ADD,
idle_timeout=0,
hard_timeout=0,
actions=actions)
else:
LOG.error('cannot install flow. unsupported version. %x',
dp.ofproto.OFP_VERSION)
for port in switch.ports:
if not port.is_reserved():
self._port_added(port)
self.lldp_event.set()
elif ev.state == DEAD_DISPATCHER:
# dp.id is None when datapath dies before handshake
if dp.id is None:
return
switch = self._get_switch(dp.id)
self._unregister(dp)
LOG.debug('unregister %s', switch)
self.send_event_to_observers(event.EventSwitchLeave(switch))
if not self.link_discovery:
return
for port in switch.ports:
if not port.is_reserved():
self.ports.del_port(port)
self._link_down(port)
self.lldp_event.set()
def state_change_handler(self, ev):
dp = ev.datapath
assert dp is not None
LOG.debug(dp)
if ev.state == MAIN_DISPATCHER:
dp_multiple_conns = False
if dp.id in self.dps:
LOG.warning('Multiple connections from %s', dpid_to_str(dp.id))
dp_multiple_conns = True
(self.dps[dp.id]).close()
self._register(dp)
switch = self._get_switch(dp.id)
LOG.debug('register %s', switch)
if not dp_multiple_conns:
self.send_event_to_observers(event.EventSwitchEnter(switch))
else:
evt = event.EventSwitchReconnected(switch)
self.send_event_to_observers(evt)
if not self.link_discovery:
return
if self.install_flow:
ofproto = dp.ofproto
ofproto_parser = dp.ofproto_parser
# TODO:XXX need other versions
if ofproto.OFP_VERSION == ofproto_v1_0.OFP_VERSION:
rule = nx_match.ClsRule()
rule.set_dl_dst(
addrconv.mac.text_to_bin(lldp.LLDP_MAC_NEAREST_BRIDGE))
rule.set_dl_type(ETH_TYPE_LLDP)
actions = [
ofproto_parser.OFPActionOutput(ofproto.OFPP_CONTROLLER,
self.LLDP_PACKET_LEN)
]
dp.send_flow_mod(rule=rule,
cookie=0,
command=ofproto.OFPFC_ADD,
idle_timeout=0,
hard_timeout=0,
actions=actions,
priority=0xFFFF)
elif ofproto.OFP_VERSION >= ofproto_v1_2.OFP_VERSION:
match = ofproto_parser.OFPMatch(
eth_type=ETH_TYPE_LLDP,
eth_dst=lldp.LLDP_MAC_NEAREST_BRIDGE)
# OFPCML_NO_BUFFER is set so that the LLDP is not
# buffered on switch
parser = ofproto_parser
actions = [
parser.OFPActionOutput(ofproto.OFPP_CONTROLLER,
ofproto.OFPCML_NO_BUFFER)
]
inst = [
parser.OFPInstructionActions(
ofproto.OFPIT_APPLY_ACTIONS, actions)
]
mod = parser.OFPFlowMod(datapath=dp,
match=match,
idle_timeout=0,
hard_timeout=0,
instructions=inst,
priority=0xFFFF)
dp.send_msg(mod)
else:
LOG.error('cannot install flow. unsupported version. %x',
dp.ofproto.OFP_VERSION)
# Do not add ports while dp has multiple connections to controller.
if not dp_multiple_conns:
for port in switch.ports:
if not port.is_reserved():
self._port_added(port)
self.lldp_event.set()
elif ev.state == DEAD_DISPATCHER:
# dp.id is None when datapath dies before handshake
if dp.id is None:
return
switch = self._get_switch(dp.id)
if switch:
if switch.dp is dp:
self._unregister(dp)
LOG.debug('unregister %s', switch)
evt = event.EventSwitchLeave(switch)
self.send_event_to_observers(evt)
if not self.link_discovery:
return
for port in switch.ports:
if not port.is_reserved():
self.ports.del_port(port)
self._link_down(port)
self.lldp_event.set()
