def build_ofclasses(version):
blacklist = ["of_experimenter", "of_action_experimenter"]
ofclasses = []
for ofclass in of_g.ir[version].classes:
cls = ofclass.name
if type_maps.class_is_virtual(cls):
continue
if cls in blacklist:
continue
members = []
type_members = []
for m in ofclass.members:
if type(m) == OFTypeMember:
members.append(m)
type_members.append(members[-1])
elif type(m) == OFLengthMember:
members.append(m)
elif type(m) == OFFieldLengthMember:
members.append(m)
elif type(m) == OFPadMember:
members.append(m)
elif type(m) == OFDataMember:
if utils.class_is_message(ofclass.name) and m.name == 'version':
# HACK move to frontend
members.append(OFTypeMember(
name=m.name,
oftype=m.oftype,
value=version))
type_members.append(members[-1])
else:
members.append(m)
ofclasses.append(
PyOFClass(name=cls,
pyname=generate_pyname(cls),
members=members,
type_members=type_members,
min_length=of_g.base_length[(cls, version)],
is_fixed_length=(cls, version) in of_g.is_fixed_length))
return ofclasses
def populate_type_maps():
"""
Use the type members in the IR to fill out the legacy type_maps.
"""
def split_inherited_cls(cls):
if cls == 'of_meter_band_stats': # HACK not a subtype of of_meter_band
return None, None
for parent in sorted(type_maps.inheritance_data.keys(), reverse=True):
if cls.startswith(parent):
return (parent, cls[len(parent)+1:])
return None, None
def find_experimenter(parent, cls):
for experimenter in sorted(of_g.experimenter_name_to_id.keys(), reverse=True):
prefix = parent + '_' + experimenter
if cls.startswith(prefix) and cls != prefix:
return experimenter
return None
def find_type_value(ofclass, m_name):
for m in ofclass.members:
if isinstance(m, OFTypeMember) and m.name == m_name:
return m.value
raise KeyError("ver=%d, cls=%s, m_name=%s" % (wire_version, cls, m_name))
# Most inheritance classes: actions, instructions, etc
for wire_version, protocol in of_g.ir.items():
for ofclass in protocol.classes:
cls = ofclass.name
parent, subcls = split_inherited_cls(cls)
if not (parent and subcls):
continue
if parent == 'of_oxm':
val = (find_type_value(ofclass, 'type_len') >> 8) & 0xff
else:
val = find_type_value(ofclass, 'type')
type_maps.inheritance_data[parent][wire_version][subcls] = val
# Extensions (only actions for now)
experimenter = find_experimenter(parent, cls)
if parent == 'of_action' and experimenter:
val = find_type_value(ofclass, 'subtype')
type_maps.extension_action_subtype[wire_version][experimenter][cls] = val
if wire_version >= of_g.VERSION_1_3:
cls2 = parent + "_id" + cls[len(parent):]
type_maps.extension_action_id_subtype[wire_version][experimenter][cls2] = val
# Messages
for wire_version, protocol in of_g.ir.items():
for ofclass in protocol.classes:
cls = ofclass.name
# HACK (though this is what loxi_utils.class_is_message() does)
if not [x for x in ofclass.members if isinstance(x, OFDataMember) and x.name == 'xid']:
continue
if type_maps.class_is_virtual(cls):
continue
subcls = cls[3:]
val = find_type_value(ofclass, 'type')
if not val in type_maps.message_types[wire_version].values():
type_maps.message_types[wire_version][subcls] = val
# Extensions
experimenter = find_experimenter('of', cls)
if experimenter:
val = find_type_value(ofclass, 'subtype')
type_maps.extension_message_subtype[wire_version][experimenter][cls] = val
type_maps.generate_maps()
def is_virtual(self):
return type_maps.class_is_virtual(self.c_name)
def build_ofclasses(version):
blacklist = ["of_action", "of_action_header", "of_header", "of_queue_prop",
"of_queue_prop_header", "of_experimenter", "of_action_experimenter",
"of_oxm", "of_oxm_header", "of_oxm_experimenter_header",
"of_hello_elem", "of_hello_elem_header"]
ofclasses = []
for cls in of_g.standard_class_order:
if type_maps.class_is_virtual(cls):
continue
if version not in of_g.unified[cls] or cls in blacklist:
continue
unified_class = util.lookup_unified_class(cls, version)
# Name for the generated Python class
if utils.class_is_action(cls):
pyname = cls[10:]
elif utils.class_is_oxm(cls):
pyname = cls[7:]
elif utils.class_is_meter_band(cls):
pyname = cls[14:]
elif utils.class_is_instruction(cls):
pyname = cls[15:]
else:
pyname = cls[3:]
type_values = get_type_values(cls, version)
members = []
type_members = []
pad_count = 0
for member in unified_class['members']:
if member['name'] in ['length', 'len']:
members.append(LengthMember(name=member['name'],
oftype=oftype.OFType(member['m_type'], version)))
elif (cls, version, member['name']) in field_length_members:
field_name = field_length_members[(cls, version, member['name'])]
members.append(FieldLengthMember(name=member['name'],
oftype=oftype.OFType(member['m_type'], version),
field_name=field_name))
elif member['name'] in type_values:
members.append(TypeMember(name=member['name'],
oftype=oftype.OFType(member['m_type'], version),
value=type_values[member['name']]))
type_members.append(members[-1])
elif member['name'].startswith("pad"):
# HACK this should be moved to the frontend
pad_oftype = oftype.OFType(member['m_type'], version)
length = struct.calcsize("!" + pad_oftype._pack_fmt())
if pad_oftype.is_array: length *= pad_oftype.array_length
members.append(PadMember(length=length))
else:
members.append(Member(name=member['name'],
oftype=oftype.OFType(member['m_type'], version)))
ofclasses.append(
OFClass(name=cls,
pyname=pyname,
members=members,
type_members=type_members,
min_length=of_g.base_length[(cls, version)],
is_fixed_length=(cls, version) in of_g.is_fixed_length))
return ofclasses
