def dispatch_hook(cls, _pkt=None, *args, **kargs):
if _pkt and len(_pkt) >= 2:
version = orb(_pkt[0])
if version == 0x04: # OpenFlow 1.3
from scapy.contrib.openflow3 import OpenFlow3
return OpenFlow3.dispatch_hook(_pkt, *args, **kargs)
elif version == 0x01: # OpenFlow 1.0
# port 6653 has been allocated by IANA, port 6633 should no
# longer be used
# OpenFlow function may be called with a None
# self in OFPPacketField
of_type = orb(_pkt[1])
if of_type == 1:
err_type = orb(_pkt[9])
# err_type is a short int, but last byte is enough
if err_type == 255:
err_type = 65535
return ofp_error_cls[err_type]
elif of_type == 16:
mp_type = orb(_pkt[9])
if mp_type == 255:
mp_type = 65535
return ofp_stats_request_cls[mp_type]
elif of_type == 17:
mp_type = orb(_pkt[9])
if mp_type == 255:
mp_type = 65535
return ofp_stats_reply_cls[mp_type]
else:
return ofpt_cls[of_type]
else:
warning("Unknown OpenFlow packet")
return _UnknownOpenFlow
def dispatch_hook(cls, _pkt=None, *args, **kargs):
if _pkt and len(_pkt) >= 2:
version = orb(_pkt[0])
if version == 0x04: # OpenFlow 1.3
from scapy.contrib.openflow3 import OpenFlow3
return OpenFlow3.dispatch_hook(_pkt, *args, **kargs)
elif version == 0x01: # OpenFlow 1.0
# port 6653 has been allocated by IANA, port 6633 should no
# longer be used
# OpenFlow function may be called with a None
# self in OFPPacketField
of_type = orb(_pkt[1])
if of_type == 1:
err_type = orb(_pkt[9])
# err_type is a short int, but last byte is enough
if err_type == 255:
err_type = 65535
return ofp_error_cls[err_type]
elif of_type == 16:
mp_type = orb(_pkt[9])
if mp_type == 255:
mp_type = 65535
return ofp_stats_request_cls[mp_type]
elif of_type == 17:
mp_type = orb(_pkt[9])
if mp_type == 255:
mp_type = 65535
return ofp_stats_reply_cls[mp_type]
else:
return ofpt_cls[of_type]
else:
warning("Unknown OpenFlow packet")
return _UnknownOpenFlow