def add_output(self, port=pyof.OFPP_CONTROLLER, max_len=pyof.OFP_DEFAULT_MISS_SEND_LEN):
"""Add output action to list
"""
oao = pyof.ofp_action_output()
oao.max_len = max_len
oao.port = port
self.add(oao)
def __init__(self, server, ofconn,
sendinterval=10, linktimeout=30):
"""Initialize
@param server yapc core
"""
if (sendinterval > linktimeout):
output.warn("Probe interval of "+str(sendinterval)+\
"is smaller than timeout of "+str(linktimeout),
self.__class__.__name__)
##Interval to send LLDP per switch/port
self.interval = sendinterval
self.__minterval = sendinterval
##Time to wait before timing out link
self.link_maintain = link_maintain(server, linktimeout)
##Reference to core
self.server = server
##Reference to OpenFlow connections
self.conn = ofconn
##Current list of switch/port LLDP is sent
self.__sw_port = []
##Packet out template
self.__po = pyof.ofp_packet_out()
oao = pyof.ofp_action_output()
self.__po.in_port = pyof.OFPP_NONE
self.__po.actions_len = oao.len
self.__po.actions.append(oao)
mc.get_client()
server.register_event_handler(ofevents.pktin.name,
self)
server.register_event_handler(ofevents.port_status.name,
self)
server.register_event_handler(ofevents.features_reply.name,
self)
server.post_event(yapc.priv_callback(self, True),
self.interval)
def unpack_action(self, string):
"""Unpack action
@param string binary string of actions
@return (action, remaining)
"""
remaining = string
action = None
ah = pyof.ofp_action_header()
ah.unpack(string)
if (ah.type == pyof.OFPAT_OUTPUT):
action = pyof.ofp_action_output()
remaining = action.unpack(string)
elif (ah.type == pyof.OFPAT_SET_NW_SRC) or (ah.type == pyof.OFPAT_SET_NW_DST):
action = pyof.ofp_action_nw_addr()
remaining = action.unpack(string)
else:
output.warn("Unhandled action type "+str(ah.type)+"!",
self.__class__.__name__)
return (None, remaining[ah.len:])
return (action, remaining)
