def get_match_field_pb(self, table_name, match_field_name, value):
p4info_match = self.get_match_field(table_name, match_field_name)
bitwidth = p4info_match.bitwidth
p4runtime_match = p4runtime_pb2.FieldMatch()
p4runtime_match.field_id = p4info_match.id
match_type = p4info_match.match_type
# if match_type == p4info_pb2.MatchField.VALID:
# valid = p4runtime_match.valid
# valid.value = bool(value)
if match_type == p4info_pb2.MatchField.EXACT:
exact = p4runtime_match.exact
exact.value = encode(value, bitwidth)
elif match_type == p4info_pb2.MatchField.LPM:
lpm = p4runtime_match.lpm
lpm.value = encode(value[0], bitwidth)
lpm.prefix_len = value[1]
elif match_type == p4info_pb2.MatchField.TERNARY:
lpm = p4runtime_match.ternary
lpm.value = encode(value[0], bitwidth)
lpm.mask = encode(value[1], bitwidth)
elif match_type == p4info_pb2.MatchField.RANGE:
lpm = p4runtime_match.range
lpm.low = encode(value[0], bitwidth)
lpm.high = encode(value[1], bitwidth)
else:
raise Exception("Unsupported match type with type %r" % match_type)
return p4runtime_match
def get_match_field_pb(self, table_name, match_field_name, value):
logger.info(
'Retrieving match field on table name - [%s], match field - [%s], '
'value - [%s]', table_name, match_field_name, value)
p4info_match = self.get_match_field(table_name, match_field_name)
bit_width = p4info_match.bitwidth
p4runtime_match = p4runtime_pb2.FieldMatch()
p4runtime_match.field_id = p4info_match.id
match_type = p4info_match.match_type
logger.info('Encoding value [%s] for exact match with bitwidth - [%s]',
value, bit_width)
if match_type == p4info_pb2.MatchField.EXACT:
logger.info('Encoding for EXACT matches')
exact = p4runtime_match.exact
if isinstance(value, list) or isinstance(value, tuple):
exact.value = encode(value[0], bit_width)
else:
exact.value = encode(value, bit_width)
elif match_type == p4info_pb2.MatchField.LPM:
logger.info('Encoding for LPM matches')
lpm = p4runtime_match.lpm
lpm.value = encode(value[0], bit_width)
lpm.prefix_len = value[1]
elif match_type == p4info_pb2.MatchField.TERNARY:
logger.info('Encoding for TERNARY matches')
ternary = p4runtime_match.ternary
ternary.value = encode(value[0], bit_width)
ternary.mask = encode(value[1], bit_width)
elif match_type == p4info_pb2.MatchField.RANGE:
logger.info('Encoding for RANGE matches')
range_match = p4runtime_match.range
range_match.low = encode(value[0], bit_width)
range_match.high = encode(value[1], bit_width)
else:
raise Exception("Unsupported match type with type %r" % match_type)
return p4runtime_match
def get_match_field_pb(self, table_name, match_field_name, value):
"""
Converts a match field value to something readable by the switch.
For each match type, the user provides:
EXACT:
<value>
LPM:
[<string (ip address)>, <prefix length>]
TERNARY:
[<value>, <bit mask>]
RANGE:
[<low value>, <high value>]
"""
p4info_match = self.get_match_field(table_name, match_field_name)
bitwidth = p4info_match.bitwidth
p4runtime_match = p4runtime_pb2.FieldMatch()
p4runtime_match.field_id = p4info_match.id
match_type = p4info_match.match_type
if match_type == p4info_pb2.MatchField.EXACT:
exact = p4runtime_match.exact
exact.value = encode(value, bitwidth)
elif match_type == p4info_pb2.MatchField.LPM:
lpm = p4runtime_match.lpm
lpm.value = encode(value[0], bitwidth)
lpm.prefix_len = value[1]
elif match_type == p4info_pb2.MatchField.TERNARY:
lpm = p4runtime_match.ternary
lpm.value = encode(value[0], bitwidth)
lpm.mask = encode(value[1], bitwidth)
elif match_type == p4info_pb2.MatchField.RANGE:
lpm = p4runtime_match.range
lpm.low = encode(value[0], bitwidth)
lpm.high = encode(value[1], bitwidth)
else:
raise Exception("Unsupported match type with type %r" % match_type)
return p4runtime_match
