def processevent(self, event):
"""Process OpenFlow message for config reply
@param event OpenFlow message event to process
@return True
"""
if isinstance(event, ofevents.features_reply):
# Get config
getconfig = pyof.ofp_header()
getconfig.type = pyof.OFPT_GET_CONFIG_REQUEST
self.conn.send(event.sock, getconfig.pack())
elif isinstance(event, ofevents.config_reply):
# Check if I should set config
desired_flags = (event.config.flags | self.default_on_config_flags) & ~self.default_off_config_flags
desired_miss_send_len = event.config.miss_send_len
if self.default_miss_send_len != None:
desired_miss_send_len = self.default_miss_send_len
if (event.config.flags != desired_flags) or (desired_miss_send_len != event.config.miss_send_len):
# Change config to desired
output.dbg(
"Set config to desired with flag %x " % desired_flags
+ "and miss_send_len "
+ str(desired_miss_send_len),
self.__class__.__name__,
)
setconfig = pyof.ofp_switch_config()
setconfig.header.type = pyof.OFPT_SET_CONFIG
setconfig.flags = desired_flags
setconfig.miss_send_len = desired_miss_send_len
self.conn.send(event.sock, setconfig.pack())
# Get config again after set
getconfig = pyof.ofp_header()
getconfig.type = pyof.OFPT_GET_CONFIG_REQUEST
self.conn.send(event.sock, getconfig.pack())
else:
# Remember config
key = self.get_key(event.sock)
mc.set(key, event.config)
output.dbg("Updated config with key " + key, self.__class__.__name__)
elif isinstance(event, comm.event):
# Socket close, so remove config
if event.event == comm.event.SOCK_CLOSE:
key = self.get_key(event.sock)
c = mc.get(key)
if c != None:
mc.delete(key)
return True
def __init__(self, sock, msg):
"""Initialize
@param sock reference to socket
@param msg message
"""
ofcomm.message.__init__(self, sock, msg)
##Switch config struct
self.config = None
if (self.header.type == pyof.OFPT_GET_CONFIG_REPLY):
self.config = pyof.ofp_switch_config()
r = self.config.unpack(msg)
if (len(r) > 0):
output.warn("Config reply is of irregular length with "+\
str(len(r))+" bytes remaining.",
self.__class__.__name__)
output.dbg("Received switch config:\n"+\
self.config.show("\t"),
self.__class__.__name__)
