Rich Lane | a06d0c3 | 2013-03-25 08:52:03 -0700 | [diff] [blame] | 1 | :: # 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 | |
| 33 | import struct |
| 34 | import const |
| 35 | import util |
| 36 | import loxi |
| 37 | |
| 38 | def unpack_list(buf): |
| 39 | if len(buf) % 8 != 0: raise loxi.ProtocolError("action list length not a multiple of 8") |
| 40 | actions = [] |
| 41 | offset = 0 |
| 42 | while offset < len(buf): |
| 43 | type, length = struct.unpack_from("!HH", buf, offset) |
| 44 | if length == 0: raise loxi.ProtocolError("action length is 0") |
| 45 | if length % 8 != 0: raise loxi.ProtocolError("action length not a multiple of 8") |
| 46 | if offset + length > len(buf): raise loxi.ProtocolError("action length overruns list length") |
| 47 | parser = parsers.get(type) |
| 48 | if not parser: raise loxi.ProtocolError("unknown action type %d" % type) |
| 49 | actions.append(parser(buffer(buf, offset, length))) |
| 50 | offset += length |
| 51 | return actions |
| 52 | |
| 53 | class Action(object): |
| 54 | type = None # override in subclass |
| 55 | pass |
| 56 | |
| 57 | :: for ofclass in ofclasses: |
| 58 | :: nonskip_members = [m for m in ofclass.members if not m.skip] |
| 59 | class ${ofclass.pyname}(Action): |
| 60 | :: for m in ofclass.type_members: |
| 61 | ${m.name} = ${m.value} |
| 62 | :: #endfor |
| 63 | |
| 64 | def __init__(self, ${', '.join(["%s=None" % m.name for m in nonskip_members])}): |
| 65 | :: for m in nonskip_members: |
| 66 | if ${m.name} != None: |
| 67 | self.${m.name} = ${m.name} |
| 68 | else: |
| 69 | self.${m.name} = ${m.oftype.gen_init_expr()} |
| 70 | :: #endfor |
| 71 | |
| 72 | def pack(self): |
| 73 | packed = [] |
| 74 | :: include("_pack.py", ofclass=ofclass) |
| 75 | return ''.join(packed) |
| 76 | |
| 77 | @staticmethod |
| 78 | def unpack(buf): |
| 79 | obj = ${ofclass.pyname}() |
| 80 | :: include("_unpack.py", ofclass=ofclass) |
| 81 | return obj |
| 82 | |
| 83 | def __eq__(self, other): |
| 84 | if type(self) != type(other): return False |
| 85 | if self.type != other.type: return False |
| 86 | :: for m in nonskip_members: |
| 87 | if self.${m.name} != other.${m.name}: return False |
| 88 | :: #endfor |
| 89 | return True |
| 90 | |
| 91 | def __ne__(self, other): |
| 92 | return not self.__eq__(other) |
| 93 | |
| 94 | def show(self): |
| 95 | import loxi.pp |
| 96 | return loxi.pp.pp(self) |
| 97 | |
| 98 | def pretty_print(self, q): |
| 99 | :: include('_pretty_print.py', ofclass=ofclass) |
| 100 | |
| 101 | :: #endfor |
| 102 | |
| 103 | def parse_vendor(buf): |
| 104 | if len(buf) < 16: |
| 105 | raise loxi.ProtocolError("experimenter action too short") |
| 106 | |
| 107 | experimenter, = struct.unpack_from("!L", buf, 4) |
| 108 | if experimenter == 0x005c16c7: # Big Switch Networks |
| 109 | subtype, = struct.unpack_from("!L", buf, 8) |
| 110 | elif experimenter == 0x00002320: # Nicira |
| 111 | subtype, = struct.unpack_from("!H", buf, 8) |
| 112 | else: |
| 113 | raise loxi.ProtocolError("unexpected experimenter id %#x" % experimenter) |
| 114 | |
| 115 | if subtype in experimenter_parsers[experimenter]: |
| 116 | return experimenter_parsers[experimenter][subtype](buf) |
| 117 | else: |
| 118 | raise loxi.ProtocolError("unexpected BSN experimenter subtype %#x" % subtype) |
| 119 | |
| 120 | parsers = { |
| 121 | :: sort_key = lambda x: x.type_members[0].value |
| 122 | :: msgtype_groups = itertools.groupby(sorted(ofclasses, key=sort_key), sort_key) |
| 123 | :: for (k, v) in msgtype_groups: |
| 124 | :: v = list(v) |
| 125 | :: if len(v) == 1: |
| 126 | ${k} : ${v[0].pyname}.unpack, |
| 127 | :: else: |
| 128 | ${k} : parse_${k[12:].lower()}, |
| 129 | :: #endif |
| 130 | :: #endfor |
| 131 | } |
| 132 | |
| 133 | :: experimenter_ofclasses = [x for x in ofclasses if x.type_members[0].value == 'const.OFPAT_VENDOR'] |
| 134 | :: sort_key = lambda x: x.type_members[1].value |
| 135 | :: experimenter_ofclasses.sort(key=sort_key) |
| 136 | :: grouped = itertools.groupby(experimenter_ofclasses, sort_key) |
| 137 | experimenter_parsers = { |
| 138 | :: for (experimenter, v) in grouped: |
| 139 | ${experimenter} : { |
| 140 | :: for ofclass in v: |
| 141 | ${ofclass.type_members[2].value}: ${ofclass.pyname}.unpack, |
| 142 | :: #endfor |
| 143 | }, |
| 144 | :: #endfor |
| 145 | } |