def _of_message_to_object(binary_string):
"""
Map a binary string to the corresponding class.
Appropriately resolves subclasses
"""
hdr = ofp.ofp_header()
hdr.unpack(binary_string)
# FIXME: Add error detection
if not hdr.type in msg_type_subclassed:
return msg_type_to_class_map[hdr.type]()
if hdr.type == ofp.OFPT_STATS_REQUEST:
sub_hdr = ofp.ofp_stats_request()
sub_hdr.unpack(binary_string[ofp.OFP_HEADER_BYTES:])
try:
obj = stats_request_to_class_map[sub_hdr.type]()
except LookupError:
obj = None
return obj
elif hdr.type == ofp.OFPT_STATS_REPLY:
sub_hdr = ofp.ofp_stats_reply()
sub_hdr.unpack(binary_string[ofp.OFP_HEADER_BYTES:])
try:
obj = stats_reply_to_class_map[sub_hdr.type]()
except LookupError:
obj = None
return obj
elif hdr.type == ofp.OFPT_ERROR:
sub_hdr = ofp.ofp_error_msg()
sub_hdr.unpack(binary_string[ofp.OFP_HEADER_BYTES:])
return error_to_class_map[sub_hdr.type]()
else:
parse_logger.error("Cannot parse pkt to message")
return None
def _of_message_to_object(binary_string):
"""
Map a binary string to the corresponding class.
Appropriately resolves subclasses
"""
hdr = ofp.ofp_header()
hdr.unpack(binary_string)
# FIXME: Add error detection
if not hdr.type in msg_type_subclassed:
return msg_type_to_class_map[hdr.type]()
if hdr.type == ofp.OFPT_STATS_REQUEST:
sub_hdr = ofp.ofp_stats_request()
sub_hdr.unpack(binary_string[ofp.OFP_HEADER_BYTES:])
try:
obj = stats_request_to_class_map[sub_hdr.type]()
except LookupError:
obj = None
return obj
elif hdr.type == ofp.OFPT_STATS_REPLY:
sub_hdr = ofp.ofp_stats_reply()
sub_hdr.unpack(binary_string[ofp.OFP_HEADER_BYTES:])
try:
obj = stats_reply_to_class_map[sub_hdr.type]()
except LookupError:
obj = None
return obj
elif hdr.type == ofp.OFPT_ERROR:
sub_hdr = ofp.ofp_error_msg()
sub_hdr.unpack(binary_string[ofp.OFP_HEADER_BYTES:])
return error_to_class_map[sub_hdr.type]()
else:
parse_logger.error("Cannot parse pkt to message")
return None
def runTest(self):
logging.info("Running Grp100No60 BadRequestBadLength test")
#In Message module at pack time the length is computed
#avoid this by using cstruct module
logging.info("Sending stats_request message..")
stats_request = ofp.ofp_stats_request()
header=ofp.ofp_header()
header.type = ofp.OFPT_STATS_REQUEST
# normal the header length is 12bytes changed it to 18bytes
header.length=18;
packed=header.pack()+stats_request.pack()
sleep(2)
rv=self.controller.message_send(packed)
sleep(2)
self.assertTrue(rv != -1,"Unable to send the message")
logging.info("Waiting for OFPT_ERROR message..")
(response, pkt) = self.controller.poll(exp_msg=ofp.OFPT_ERROR,
timeout=5)
self.assertTrue(response is not None,
'Switch did not reply with expected error messge')
self.assertTrue(response.type==ofp.OFPET_BAD_REQUEST,
'Error type is not OFPET_BAD_REQUEST')
self.assertTrue(response.type==ofp.OFPBRC_BAD_LEN,
'Error code is not OFPBRC_BAD_LEN')
