blob: 089cc537444bb4d943c572491b27483c77099712 [file] [log] [blame]
Rich Lanea06d0c32013-03-25 08:52:03 -07001:: # Copyright 2013, Big Switch Networks, Inc.
2:: #
3:: # LoxiGen is licensed under the Eclipse Public License, version 1.0 (EPL), with
4:: # the following special exception:
5:: #
6:: # LOXI Exception
7:: #
8:: # As a special exception to the terms of the EPL, you may distribute libraries
9:: # generated by LoxiGen (LoxiGen Libraries) under the terms of your choice, provided
10:: # that copyright and licensing notices generated by LoxiGen are not altered or removed
11:: # from the LoxiGen Libraries and the notice provided below is (i) included in
12:: # the LoxiGen Libraries, if distributed in source code form and (ii) included in any
13:: # documentation for the LoxiGen Libraries, if distributed in binary form.
14:: #
15:: # Notice: "Copyright 2013, Big Switch Networks, Inc. This library was generated by the LoxiGen Compiler."
16:: #
17:: # You may not use this file except in compliance with the EPL or LOXI Exception. You may obtain
18:: # a copy of the EPL at:
19:: #
20:: # http://www.eclipse.org/legal/epl-v10.html
21:: #
22:: # Unless required by applicable law or agreed to in writing, software
23:: # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
24:: # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
25:: # EPL for the specific language governing permissions and limitations
26:: # under the EPL.
27::
28:: import itertools
29:: include('_copyright.py')
30
31:: include('_autogen.py')
32
33import struct
34import const
35import util
36import loxi
37
38def unpack_list(buf):
39 if len(buf) % 8 != 0: raise loxi.ProtocolError("action list length not a multiple of 8")
Rich Laned4e08692013-02-20 17:40:33 -080040 def deserializer(buf):
41 type, length = struct.unpack_from("!HH", buf)
Rich Lanea06d0c32013-03-25 08:52:03 -070042 if length % 8 != 0: raise loxi.ProtocolError("action length not a multiple of 8")
Rich Lanea06d0c32013-03-25 08:52:03 -070043 parser = parsers.get(type)
44 if not parser: raise loxi.ProtocolError("unknown action type %d" % type)
Rich Laned4e08692013-02-20 17:40:33 -080045 return parser(buf)
46 return util.unpack_list(deserializer, "!2xH", buf)
Rich Lanea06d0c32013-03-25 08:52:03 -070047
48class Action(object):
49 type = None # override in subclass
50 pass
51
52:: for ofclass in ofclasses:
Rich Laned1dd9e62013-02-20 18:28:01 -080053:: include('_ofclass.py', ofclass=ofclass, superclass="Action")
Rich Lanea06d0c32013-03-25 08:52:03 -070054
55:: #endfor
56
57def parse_vendor(buf):
58 if len(buf) < 16:
59 raise loxi.ProtocolError("experimenter action too short")
60
61 experimenter, = struct.unpack_from("!L", buf, 4)
62 if experimenter == 0x005c16c7: # Big Switch Networks
63 subtype, = struct.unpack_from("!L", buf, 8)
64 elif experimenter == 0x00002320: # Nicira
65 subtype, = struct.unpack_from("!H", buf, 8)
66 else:
67 raise loxi.ProtocolError("unexpected experimenter id %#x" % experimenter)
68
69 if subtype in experimenter_parsers[experimenter]:
70 return experimenter_parsers[experimenter][subtype](buf)
71 else:
72 raise loxi.ProtocolError("unexpected BSN experimenter subtype %#x" % subtype)
73
74parsers = {
75:: sort_key = lambda x: x.type_members[0].value
76:: msgtype_groups = itertools.groupby(sorted(ofclasses, key=sort_key), sort_key)
77:: for (k, v) in msgtype_groups:
78:: v = list(v)
79:: if len(v) == 1:
80 ${k} : ${v[0].pyname}.unpack,
81:: else:
82 ${k} : parse_${k[12:].lower()},
83:: #endif
84:: #endfor
85}
86
87:: experimenter_ofclasses = [x for x in ofclasses if x.type_members[0].value == 'const.OFPAT_VENDOR']
88:: sort_key = lambda x: x.type_members[1].value
89:: experimenter_ofclasses.sort(key=sort_key)
90:: grouped = itertools.groupby(experimenter_ofclasses, sort_key)
91experimenter_parsers = {
92:: for (experimenter, v) in grouped:
93 ${experimenter} : {
94:: for ofclass in v:
95 ${ofclass.type_members[2].value}: ${ofclass.pyname}.unpack,
96:: #endfor
97 },
98:: #endfor
99}