include/openvswitch/ofp-msgs.h

   1 /*
   2  * Copyright (c) 2012, 2013, 2014, 2015, 2016 Nicira, Inc.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #ifndef OPENVSWITCH_OFP_MSGS_H
  18 #define OPENVSWITCH_OFP_MSGS_H 1
  19
  20 /* OpenFlow message headers abstraction.
  21  *
  22  * OpenFlow headers are unnecessarily complicated:
  23  *
  24  *   - Some messages with the same meaning were renumbered between 1.0 and 1.1.
  25  *
  26  *   - "Statistics" (aka multipart) messages have a different format from other
  27  *     messages.
  28  *
  29  *   - The 1.0 header for statistics messages is an odd number of 32-bit words
  30  *     long, leaving 64-bit quantities in the body misaligned.  The 1.1 header
  31  *     for statistics added a padding word to fix this misalignment, although
  32  *     many statistic message bodies did not change.
  33  *
  34  *   - Vendor-defined messages have an additional header but no standard way to
  35  *     distinguish individual types of message within a given vendor.
  36  *
  37  * This file attempts to abstract out the differences between the various forms
  38  * of headers.
  39  */
  40
  41 #include "openvswitch/ofp-errors.h"
  42 #include "openvswitch/types.h"
  43 #include "util.h"
  44
  45 struct ovs_list;
  46 \f
  47 /* Raw identifiers for OpenFlow messages.
  48  *
  49  * Some OpenFlow messages with similar meanings have multiple variants across
  50  * OpenFlow versions or vendor extensions.  Each variant has a different
  51  * OFPRAW_* enumeration constant.  More specifically, if two messages have
  52  * different types, different numbers, or different arguments, then they must
  53  * have different OFPRAW_* values.
  54  *
  55  * The comments here must follow a stylized form because the "extract-ofp-msgs"
  56  * program parses them at build time to generate data tables.  The syntax of
  57  * each comment is:
  58  *
  59  *    type versions (number): arguments.
  60  *
  61  * where the syntax of each part is:
  62  *
  63  *    - type: One of the following:
  64  *
  65  *          * OFPT: standard OpenFlow message.
  66  *          * OFPST: standard OpenFlow statistics or multipart message.
  67  *          * NXT: Nicira extension message.
  68  *          * NXST: Nicira extension statistics or multipart message.
  69  *          * ONFT: Open Networking Foundation extension message.
  70  *          * ONFST: Open Networking Foundation multipart message.
  71  *
  72  *      As new vendors implement extensions it will make sense to expand the
  73  *      dictionary of possible types.
  74  *
  75  *    - versions: The OpenFlow version or versions in which this message is
  76  *      supported, e.g. "1.0" or "1.1" or "1.0+".
  77  *
  78  *    - number:
  79  *         For OFPT, the 'type' in struct ofp_header.
  80  *         For OFPST, the 'type' in struct ofp_stats_msg or ofp11_stats_msg.
  81  *         For NXT or ONFT, the 'subtype' in struct ofp_vendor_header.
  82  *         For NXST or ONFST, the 'subtype' in an appropriate vendor stats
  83  *         struct.
  84  *
  85  *    - arguments: The types of data that follow the OpenFlow headers (the
  86  *      message "body").  This can be "void" if the message has no body.
  87  *      Otherwise, it should be a comma-separated sequence of C types.  The
  88  *      last type in the sequence can end with [] if the body ends in a
  89  *      variable-length sequence.
  90  *
  91  *      The arguments are used to validate the lengths of messages when a
  92  *      header is parsed.  Any message whose length isn't valid as a length of
  93  *      the specified types will be rejected with OFPERR_OFPBRC_BAD_LEN.
  94  *
  95  *      A few OpenFlow messages, such as OFPT_PACKET_IN, intentionally end with
  96  *      only part of a structure, up to some specified member.  The syntax "up
  97  *      to <member>" indicates this, e.g. "struct ofp11_packet_in up to data".
  98  */
  99 enum ofpraw {
 100 /* Immutable standard messages.
 101  *
 102  * The OpenFlow standard promises to preserve these messages and their numbers
 103  * in future versions, so we mark them as <all>, which covers every OpenFlow
 104  * version numbered 0x01...0xff, rather than as OF1.0+, which covers only
 105  * OpenFlow versions that we otherwise implement.
 106  *
 107  * Without <all> here, then we would fail to decode "hello" messages that
 108  * announce a version higher than we understand, even though there still could
 109  * be a version in common with the peer that we do understand.  The <all>
 110  * keyword is less useful for the other messages, because our OpenFlow channels
 111  * accept only OpenFlow messages with a previously negotiated version.
 112  */
 113
 114     /* OFPT <all> (0): uint8_t[]. */
 115     OFPRAW_OFPT_HELLO,
 116
 117     /* OFPT <all> (1): struct ofp_error_msg, uint8_t[]. */
 118     OFPRAW_OFPT_ERROR,
 119
 120     /* OFPT <all> (2): uint8_t[]. */
 121     OFPRAW_OFPT_ECHO_REQUEST,
 122
 123     /* OFPT <all> (3): uint8_t[]. */
 124     OFPRAW_OFPT_ECHO_REPLY,
 125
 126 /* Other standard messages.
 127  *
 128  * The meanings of these messages can (and often do) change from one version
 129  * of OpenFlow to another. */
 130
 131     /* OFPT 1.0+ (5): void. */
 132     OFPRAW_OFPT_FEATURES_REQUEST,
 133
 134     /* OFPT 1.0 (6): struct ofp_switch_features, struct ofp10_phy_port[]. */
 135     OFPRAW_OFPT10_FEATURES_REPLY,
 136     /* OFPT 1.1-1.2 (6): struct ofp_switch_features, struct ofp11_port[]. */
 137     OFPRAW_OFPT11_FEATURES_REPLY,
 138     /* OFPT 1.3+ (6): struct ofp_switch_features. */
 139     OFPRAW_OFPT13_FEATURES_REPLY,
 140
 141     /* OFPT 1.0+ (7): void. */
 142     OFPRAW_OFPT_GET_CONFIG_REQUEST,
 143
 144     /* OFPT 1.0+ (8): struct ofp_switch_config. */
 145     OFPRAW_OFPT_GET_CONFIG_REPLY,
 146
 147     /* OFPT 1.0+ (9): struct ofp_switch_config. */
 148     OFPRAW_OFPT_SET_CONFIG,
 149
 150     /* OFPT 1.0 (10): struct ofp10_packet_in up to data, uint8_t[]. */
 151     OFPRAW_OFPT10_PACKET_IN,
 152     /* OFPT 1.1 (10): struct ofp11_packet_in, uint8_t[]. */
 153     OFPRAW_OFPT11_PACKET_IN,
 154     /* OFPT 1.2 (10): struct ofp12_packet_in, uint8_t[]. */
 155     OFPRAW_OFPT12_PACKET_IN,
 156     /* OFPT 1.3+ (10): struct ofp12_packet_in, ovs_be64, uint8_t[]. */
 157     OFPRAW_OFPT13_PACKET_IN,
 158     /* NXT 1.0+ (17): struct nx_packet_in, uint8_t[]. */
 159     OFPRAW_NXT_PACKET_IN,
 160     /* NXT 1.0+ (30): uint8_t[8][]. */
 161     OFPRAW_NXT_PACKET_IN2,
 162
 163     /* OFPT 1.0 (11): struct ofp10_flow_removed. */
 164     OFPRAW_OFPT10_FLOW_REMOVED,
 165     /* OFPT 1.1+ (11): struct ofp11_flow_removed, uint8_t[8][]. */
 166     OFPRAW_OFPT11_FLOW_REMOVED,
 167     /* NXT 1.0+ (14): struct nx_flow_removed, uint8_t[8][]. */
 168     OFPRAW_NXT_FLOW_REMOVED,
 169
 170     /* OFPT 1.0 (12): struct ofp_port_status, struct ofp10_phy_port. */
 171     OFPRAW_OFPT10_PORT_STATUS,
 172     /* OFPT 1.1-1.3 (12): struct ofp_port_status, struct ofp11_port. */
 173     OFPRAW_OFPT11_PORT_STATUS,
 174     /* OFPT 1.4+ (12): struct ofp_port_status, struct ofp14_port, uint8_t[8][]. */
 175     OFPRAW_OFPT14_PORT_STATUS,
 176
 177     /* OFPT 1.0 (13): struct ofp10_packet_out, uint8_t[]. */
 178     OFPRAW_OFPT10_PACKET_OUT,
 179     /* OFPT 1.1+ (13): struct ofp11_packet_out, uint8_t[]. */
 180     OFPRAW_OFPT11_PACKET_OUT,
 181
 182     /* OFPT 1.0 (14): struct ofp10_flow_mod, uint8_t[8][]. */
 183     OFPRAW_OFPT10_FLOW_MOD,
 184     /* OFPT 1.1+ (14): struct ofp11_flow_mod, struct ofp11_instruction[]. */
 185     OFPRAW_OFPT11_FLOW_MOD,
 186     /* NXT 1.0+ (13): struct nx_flow_mod, uint8_t[8][]. */
 187     OFPRAW_NXT_FLOW_MOD,
 188
 189     /* OFPT 1.1-1.4 (15): struct ofp11_group_mod, uint8_t[8][]. */
 190     OFPRAW_OFPT11_GROUP_MOD,
 191     /* OFPT 1.5+ (15): struct ofp15_group_mod, uint8_t[8][]. */
 192     OFPRAW_OFPT15_GROUP_MOD,
 193
 194     /* OFPT 1.0 (15): struct ofp10_port_mod. */
 195     OFPRAW_OFPT10_PORT_MOD,
 196     /* OFPT 1.1-1.3 (16): struct ofp11_port_mod. */
 197     OFPRAW_OFPT11_PORT_MOD,
 198     /* OFPT 1.4+ (16): struct ofp14_port_mod, uint8_t[8][]. */
 199     OFPRAW_OFPT14_PORT_MOD,
 200
 201     /* OFPT 1.1-1.3 (17): struct ofp11_table_mod. */
 202     OFPRAW_OFPT11_TABLE_MOD,
 203     /* OFPT 1.4+ (17): struct ofp14_table_mod, uint8_t[8][]. */
 204     OFPRAW_OFPT14_TABLE_MOD,
 205
 206     /* OFPT 1.0 (18): void. */
 207     OFPRAW_OFPT10_BARRIER_REQUEST,
 208     /* OFPT 1.1+ (20): void. */
 209     OFPRAW_OFPT11_BARRIER_REQUEST,
 210
 211     /* OFPT 1.0 (19): void. */
 212     OFPRAW_OFPT10_BARRIER_REPLY,
 213     /* OFPT 1.1+ (21): void. */
 214     OFPRAW_OFPT11_BARRIER_REPLY,
 215
 216     /* OFPT 1.0 (20): struct ofp10_queue_get_config_request. */
 217     OFPRAW_OFPT10_QUEUE_GET_CONFIG_REQUEST,
 218     /* OFPT 1.1-1.3 (22): struct ofp11_queue_get_config_request. */
 219     OFPRAW_OFPT11_QUEUE_GET_CONFIG_REQUEST,
 220
 221     /* OFPT 1.0 (21): struct ofp10_queue_get_config_reply, uint8_t[8][]. */
 222     OFPRAW_OFPT10_QUEUE_GET_CONFIG_REPLY,
 223     /* OFPT 1.1-1.3 (23): struct ofp11_queue_get_config_reply, uint8_t[8][]. */
 224     OFPRAW_OFPT11_QUEUE_GET_CONFIG_REPLY,
 225
 226     /* OFPT 1.2+ (24): struct ofp12_role_request. */
 227     OFPRAW_OFPT12_ROLE_REQUEST,
 228     /* NXT 1.0+ (10): struct nx_role_request. */
 229     OFPRAW_NXT_ROLE_REQUEST,
 230
 231     /* OFPT 1.2+ (25): struct ofp12_role_request. */
 232     OFPRAW_OFPT12_ROLE_REPLY,
 233     /* NXT 1.0+ (11): struct nx_role_request. */
 234     OFPRAW_NXT_ROLE_REPLY,
 235
 236     /* OFPT 1.3 (26): void. */
 237     OFPRAW_OFPT13_GET_ASYNC_REQUEST,
 238     /* OFPT 1.4+ (26): void. */
 239     OFPRAW_OFPT14_GET_ASYNC_REQUEST,
 240     /* OFPT 1.3 (27): struct ofp13_async_config. */
 241     OFPRAW_OFPT13_GET_ASYNC_REPLY,
 242     /* OFPT 1.4+ (27): uint8_t[8][]. */
 243     OFPRAW_OFPT14_GET_ASYNC_REPLY,
 244     /* OFPT 1.3 (28): struct ofp13_async_config. */
 245     OFPRAW_OFPT13_SET_ASYNC,
 246     /* NXT 1.0+ (19): struct nx_async_config. */
 247     OFPRAW_NXT_SET_ASYNC_CONFIG,
 248     /* NXT 1.0-1.3 (27): uint8_t[8][]. */
 249     OFPRAW_NXT_SET_ASYNC_CONFIG2,
 250     /* OFPT 1.4+ (28): uint8_t[8][]. */
 251     OFPRAW_OFPT14_SET_ASYNC,
 252
 253     /* OFPT 1.3+ (29): struct ofp13_meter_mod, uint8_t[8][]. */
 254     OFPRAW_OFPT13_METER_MOD,
 255
 256     /* OFPT 1.4+ (30): struct ofp14_role_status, uint8_t[8][]. */
 257     OFPRAW_OFPT14_ROLE_STATUS,
 258
 259     /* OFPT 1.4+ (31): struct ofp14_table_status, uint8_t[8][]. */
 260     OFPRAW_OFPT14_TABLE_STATUS,
 261
 262     /* OFPT 1.4+ (32): struct ofp14_requestforward, uint8_t[8][]. */
 263     OFPRAW_OFPT14_REQUESTFORWARD,
 264
 265     /* OFPT 1.4+ (33): struct ofp14_bundle_ctrl_msg, uint8_t[8][]. */
 266     OFPRAW_OFPT14_BUNDLE_CONTROL,
 267     /* ONFT 1.3 (2300): struct ofp14_bundle_ctrl_msg, uint8_t[8][]. */
 268     OFPRAW_ONFT13_BUNDLE_CONTROL,
 269
 270     /* OFPT 1.4+ (34): struct ofp14_bundle_ctrl_msg, uint8_t[]. */
 271     OFPRAW_OFPT14_BUNDLE_ADD_MESSAGE,
 272     /* ONFT 1.3 (2301): struct ofp14_bundle_ctrl_msg, uint8_t[]. */
 273     OFPRAW_ONFT13_BUNDLE_ADD_MESSAGE,
 274
 275 /* Standard statistics. */
 276
 277     /* OFPST 1.0+ (0): void. */
 278     OFPRAW_OFPST_DESC_REQUEST,
 279
 280     /* OFPST 1.0+ (0): struct ofp_desc_stats. */
 281     OFPRAW_OFPST_DESC_REPLY,
 282
 283     /* OFPST 1.0 (1): struct ofp10_flow_stats_request. */
 284     OFPRAW_OFPST10_FLOW_REQUEST,
 285     /* OFPST 1.1+ (1): struct ofp11_flow_stats_request, uint8_t[8][]. */
 286     OFPRAW_OFPST11_FLOW_REQUEST,
 287     /* NXST 1.0 (0): struct nx_flow_stats_request, uint8_t[8][]. */
 288     OFPRAW_NXST_FLOW_REQUEST,
 289
 290     /* OFPST 1.0 (1): uint8_t[]. */
 291     OFPRAW_OFPST10_FLOW_REPLY,
 292     /* OFPST 1.1-1.2 (1): uint8_t[]. */
 293     OFPRAW_OFPST11_FLOW_REPLY,
 294     /* OFPST 1.3+ (1): uint8_t[]. */
 295     OFPRAW_OFPST13_FLOW_REPLY,
 296     /* NXST 1.0 (0): uint8_t[]. */
 297     OFPRAW_NXST_FLOW_REPLY,
 298
 299     /* OFPST 1.0 (2): struct ofp10_flow_stats_request. */
 300     OFPRAW_OFPST10_AGGREGATE_REQUEST,
 301     /* OFPST 1.1+ (2): struct ofp11_flow_stats_request, uint8_t[8][]. */
 302     OFPRAW_OFPST11_AGGREGATE_REQUEST,
 303     /* NXST 1.0 (1): struct nx_flow_stats_request, uint8_t[8][]. */
 304     OFPRAW_NXST_AGGREGATE_REQUEST,
 305
 306     /* OFPST 1.0+ (2): struct ofp_aggregate_stats_reply. */
 307     OFPRAW_OFPST_AGGREGATE_REPLY,
 308     /* NXST 1.0 (1): struct ofp_aggregate_stats_reply. */
 309     OFPRAW_NXST_AGGREGATE_REPLY,
 310
 311     /* OFPST 1.0+ (3): void. */
 312     OFPRAW_OFPST_TABLE_REQUEST,
 313
 314     /* OFPST 1.0 (3): struct ofp10_table_stats[]. */
 315     OFPRAW_OFPST10_TABLE_REPLY,
 316     /* OFPST 1.1 (3): struct ofp11_table_stats[]. */
 317     OFPRAW_OFPST11_TABLE_REPLY,
 318     /* OFPST 1.2 (3): struct ofp12_table_stats[]. */
 319     OFPRAW_OFPST12_TABLE_REPLY,
 320     /* OFPST 1.3+ (3): struct ofp13_table_stats[]. */
 321     OFPRAW_OFPST13_TABLE_REPLY,
 322
 323     /* OFPST 1.0 (4): struct ofp10_port_stats_request. */
 324     OFPRAW_OFPST10_PORT_REQUEST,
 325     /* OFPST 1.1+ (4): struct ofp11_port_stats_request. */
 326     OFPRAW_OFPST11_PORT_REQUEST,
 327
 328     /* OFPST 1.0 (4): struct ofp10_port_stats[]. */
 329     OFPRAW_OFPST10_PORT_REPLY,
 330     /* OFPST 1.1-1.2 (4): struct ofp11_port_stats[]. */
 331     OFPRAW_OFPST11_PORT_REPLY,
 332     /* OFPST 1.3 (4): struct ofp13_port_stats[]. */
 333     OFPRAW_OFPST13_PORT_REPLY,
 334     /* OFPST 1.4+ (4): uint8_t[8][]. */
 335     OFPRAW_OFPST14_PORT_REPLY,
 336
 337     /* OFPST 1.0 (5): struct ofp10_queue_stats_request. */
 338     OFPRAW_OFPST10_QUEUE_REQUEST,
 339     /* OFPST 1.1+ (5): struct ofp11_queue_stats_request. */
 340     OFPRAW_OFPST11_QUEUE_REQUEST,
 341
 342     /* OFPST 1.0 (5): struct ofp10_queue_stats[]. */
 343     OFPRAW_OFPST10_QUEUE_REPLY,
 344     /* OFPST 1.1-1.2 (5): struct ofp11_queue_stats[]. */
 345     OFPRAW_OFPST11_QUEUE_REPLY,
 346     /* OFPST 1.3 (5): struct ofp13_queue_stats[]. */
 347     OFPRAW_OFPST13_QUEUE_REPLY,
 348     /* OFPST 1.4+ (5): uint8_t[8][]. */
 349     OFPRAW_OFPST14_QUEUE_REPLY,
 350
 351     /* OFPST 1.1+ (6): struct ofp11_group_stats_request. */
 352     OFPRAW_OFPST11_GROUP_REQUEST,
 353
 354     /* OFPST 1.1-1.2 (6): uint8_t[8][]. */
 355     OFPRAW_OFPST11_GROUP_REPLY,
 356     /* OFPST 1.3+ (6): uint8_t[8][]. */
 357     OFPRAW_OFPST13_GROUP_REPLY,
 358
 359     /* OFPST 1.1-1.4 (7): void. */
 360     OFPRAW_OFPST11_GROUP_DESC_REQUEST,
 361     /* OFPST 1.5+ (7): struct ofp15_group_desc_request. */
 362     OFPRAW_OFPST15_GROUP_DESC_REQUEST,
 363
 364     /* OFPST 1.1+ (7): uint8_t[8][]. */
 365     OFPRAW_OFPST11_GROUP_DESC_REPLY,
 366
 367     /* OFPST 1.2+ (8): void. */
 368     OFPRAW_OFPST12_GROUP_FEATURES_REQUEST,
 369
 370     /* OFPST 1.2+ (8): struct ofp12_group_features_stats. */
 371     OFPRAW_OFPST12_GROUP_FEATURES_REPLY,
 372
 373     /* OFPST 1.3+ (9): struct ofp13_meter_multipart_request. */
 374     OFPRAW_OFPST13_METER_REQUEST,
 375
 376     /* OFPST 1.3+ (9): uint8_t[8][]. */
 377     OFPRAW_OFPST13_METER_REPLY,
 378
 379     /* OFPST 1.3+ (10): struct ofp13_meter_multipart_request. */
 380     OFPRAW_OFPST13_METER_CONFIG_REQUEST,
 381
 382     /* OFPST 1.3+ (10): uint8_t[8][]. */
 383     OFPRAW_OFPST13_METER_CONFIG_REPLY,
 384
 385     /* OFPST 1.3+ (11): void. */
 386     OFPRAW_OFPST13_METER_FEATURES_REQUEST,
 387
 388     /* OFPST 1.3+ (11): struct ofp13_meter_features. */
 389     OFPRAW_OFPST13_METER_FEATURES_REPLY,
 390
 391     /* OFPST 1.3+ (12): void. */
 392     OFPRAW_OFPST13_TABLE_FEATURES_REQUEST,
 393
 394     /* OFPST 1.3+ (12): struct ofp13_table_features, uint8_t[8][]. */
 395     OFPRAW_OFPST13_TABLE_FEATURES_REPLY,
 396
 397     /* OFPST 1.4+ (14): void. */
 398     OFPRAW_OFPST14_TABLE_DESC_REQUEST,
 399
 400     /* OFPST 1.4+ (14): struct ofp14_table_desc, uint8_t[8][]. */
 401     OFPRAW_OFPST14_TABLE_DESC_REPLY,
 402
 403     /* OFPST 1.0-1.4 (13): void. */
 404     OFPRAW_OFPST10_PORT_DESC_REQUEST,
 405     /* OFPST 1.5+ (13): struct ofp15_port_desc_request. */
 406     OFPRAW_OFPST15_PORT_DESC_REQUEST,
 407
 408     /* OFPST 1.0 (13): struct ofp10_phy_port[]. */
 409     OFPRAW_OFPST10_PORT_DESC_REPLY,
 410     /* OFPST 1.1-1.3 (13): struct ofp11_port[]. */
 411     OFPRAW_OFPST11_PORT_DESC_REPLY,
 412     /* OFPST 1.4+ (13): uint8_t[8][]. */
 413     OFPRAW_OFPST14_PORT_DESC_REPLY,
 414
 415     /* OFPST 1.4+ (15): struct ofp14_queue_desc_request. */
 416     OFPRAW_OFPST14_QUEUE_DESC_REQUEST,
 417     /* OFPST 1.4+ (15): uint8_t[8][]. */
 418     OFPRAW_OFPST14_QUEUE_DESC_REPLY,
 419
 420     /* OFPST 1.4+ (16): uint8_t[8][]. */
 421     OFPRAW_OFPST14_FLOW_MONITOR_REQUEST,
 422     /* NXST 1.0 (2): uint8_t[8][]. */
 423     OFPRAW_NXST_FLOW_MONITOR_REQUEST,
 424
 425     /* OFPST 1.4+ (16): uint8_t[8][]. */
 426     OFPRAW_OFPST14_FLOW_MONITOR_REPLY,
 427     /* NXST 1.0 (2): uint8_t[8][]. */
 428     OFPRAW_NXST_FLOW_MONITOR_REPLY,
 429
 430 /* Nicira extension messages.
 431  *
 432  * Nicira extensions that correspond to standard OpenFlow messages are listed
 433  * alongside the standard versions above. */
 434
 435     /* NXT 1.0 (12): struct nx_set_flow_format. */
 436     OFPRAW_NXT_SET_FLOW_FORMAT,
 437
 438     /* NXT 1.0+ (15): struct nx_flow_mod_table_id. */
 439     OFPRAW_NXT_FLOW_MOD_TABLE_ID,
 440
 441     /* NXT 1.0+ (16): struct nx_set_packet_in_format. */
 442     OFPRAW_NXT_SET_PACKET_IN_FORMAT,
 443
 444     /* NXT 1.0+ (18): void. */
 445     OFPRAW_NXT_FLOW_AGE,
 446
 447     /* NXT 1.0+ (20): struct nx_controller_id. */
 448     OFPRAW_NXT_SET_CONTROLLER_ID,
 449
 450     /* NXT 1.0+ (21): struct nx_flow_monitor_cancel. */
 451     OFPRAW_NXT_FLOW_MONITOR_CANCEL,
 452
 453     /* NXT 1.0+ (22): void. */
 454     OFPRAW_NXT_FLOW_MONITOR_PAUSED,
 455
 456     /* NXT 1.0+ (23): void. */
 457     OFPRAW_NXT_FLOW_MONITOR_RESUMED,
 458
 459     /* NXT 1.0+ (24): struct nx_tlv_table_mod, struct nx_tlv_map[]. */
 460     OFPRAW_NXT_TLV_TABLE_MOD,
 461
 462     /* NXT 1.0+ (25): void. */
 463     OFPRAW_NXT_TLV_TABLE_REQUEST,
 464
 465     /* NXT 1.0+ (26): struct nx_tlv_table_reply, struct nx_tlv_map[]. */
 466     OFPRAW_NXT_TLV_TABLE_REPLY,
 467
 468     /* NXT 1.0+ (28): uint8_t[8][]. */
 469     OFPRAW_NXT_RESUME,
 470
 471     /* NXST 1.0+ (3): void. */
 472     OFPRAW_NXST_IPFIX_BRIDGE_REQUEST,
 473
 474     /* NXST 1.0+ (3): struct nx_ipfix_stats_reply. */
 475     OFPRAW_NXST_IPFIX_BRIDGE_REPLY,
 476
 477     /* NXST 1.0+ (4): void. */
 478     OFPRAW_NXST_IPFIX_FLOW_REQUEST,
 479
 480     /* NXST 1.0+ (4): struct nx_ipfix_stats_reply[]. */
 481     OFPRAW_NXST_IPFIX_FLOW_REPLY,
 482 };
 483
 484 /* Decoding messages into OFPRAW_* values. */
 485 enum ofperr ofpraw_decode(enum ofpraw *, const struct ofp_header *);
 486 enum ofpraw ofpraw_decode_assert(const struct ofp_header *);
 487 enum ofperr ofpraw_pull(enum ofpraw *, struct ofpbuf *);
 488 enum ofpraw ofpraw_pull_assert(struct ofpbuf *);
 489
 490 enum ofperr ofpraw_decode_partial(enum ofpraw *,
 491                                   const struct ofp_header *, size_t length);
 492
 493 /* Encoding messages using OFPRAW_* values. */
 494 struct ofpbuf *ofpraw_alloc(enum ofpraw, uint8_t ofp_version,
 495                             size_t extra_tailroom);
 496 struct ofpbuf *ofpraw_alloc_xid(enum ofpraw, uint8_t ofp_version,
 497                                 ovs_be32 xid, size_t extra_tailroom);
 498 struct ofpbuf *ofpraw_alloc_reply(enum ofpraw,
 499                                   const struct ofp_header *request,
 500                                   size_t extra_tailroom);
 501 struct ofpbuf *ofpraw_alloc_stats_reply(const struct ofp_header *request,
 502                                         size_t extra_tailroom);
 503
 504 void ofpraw_put(enum ofpraw, uint8_t ofp_version, struct ofpbuf *);
 505 void ofpraw_put_xid(enum ofpraw, uint8_t ofp_version, ovs_be32 xid,
 506                     struct ofpbuf *);
 507 void ofpraw_put_reply(enum ofpraw, const struct ofp_header *request,
 508                       struct ofpbuf *);
 509 void ofpraw_put_stats_reply(const struct ofp_header *request, struct ofpbuf *);
 510
 511 /* Information about OFPRAW_* values. */
 512 const char *ofpraw_get_name(enum ofpraw);
 513 enum ofpraw ofpraw_stats_request_to_reply(enum ofpraw, uint8_t version);
 514 \f
 515 /* Semantic identifiers for OpenFlow messages.
 516  *
 517  * Each OFPTYPE_* enumeration constant represents one or more concrete format
 518  * of OpenFlow message.  When two variants of a message have essentially the
 519  * same meaning, they are assigned a single OFPTYPE_* value.
 520  *
 521  * The comments here must follow a stylized form because the "extract-ofp-msgs"
 522  * program parses them at build time to generate data tables.  The format is
 523  * simply to list each OFPRAW_* enumeration constant for a given OFPTYPE_*,
 524  * each followed by a period. */
 525 enum ofptype {
 526     /* Immutable messages. */
 527     OFPTYPE_HELLO,               /* OFPRAW_OFPT_HELLO. */
 528     OFPTYPE_ERROR,               /* OFPRAW_OFPT_ERROR. */
 529     OFPTYPE_ECHO_REQUEST,        /* OFPRAW_OFPT_ECHO_REQUEST. */
 530     OFPTYPE_ECHO_REPLY,          /* OFPRAW_OFPT_ECHO_REPLY. */
 531
 532     /* Switch configuration messages. */
 533     OFPTYPE_FEATURES_REQUEST,    /* OFPRAW_OFPT_FEATURES_REQUEST. */
 534     OFPTYPE_FEATURES_REPLY,      /* OFPRAW_OFPT10_FEATURES_REPLY.
 535                                   * OFPRAW_OFPT11_FEATURES_REPLY.
 536                                   * OFPRAW_OFPT13_FEATURES_REPLY. */
 537     OFPTYPE_GET_CONFIG_REQUEST,  /* OFPRAW_OFPT_GET_CONFIG_REQUEST. */
 538     OFPTYPE_GET_CONFIG_REPLY,    /* OFPRAW_OFPT_GET_CONFIG_REPLY. */
 539     OFPTYPE_SET_CONFIG,          /* OFPRAW_OFPT_SET_CONFIG. */
 540
 541     /* Asynchronous messages. */
 542     OFPTYPE_PACKET_IN,           /* OFPRAW_OFPT10_PACKET_IN.
 543                                   * OFPRAW_OFPT11_PACKET_IN.
 544                                   * OFPRAW_OFPT12_PACKET_IN.
 545                                   * OFPRAW_OFPT13_PACKET_IN.
 546                                   * OFPRAW_NXT_PACKET_IN2.
 547                                   * OFPRAW_NXT_PACKET_IN. */
 548     OFPTYPE_FLOW_REMOVED,        /* OFPRAW_OFPT10_FLOW_REMOVED.
 549                                   * OFPRAW_OFPT11_FLOW_REMOVED.
 550                                   * OFPRAW_NXT_FLOW_REMOVED. */
 551     OFPTYPE_PORT_STATUS,         /* OFPRAW_OFPT10_PORT_STATUS.
 552                                   * OFPRAW_OFPT11_PORT_STATUS.
 553                                   * OFPRAW_OFPT14_PORT_STATUS. */
 554
 555     /* Controller command messages. */
 556     OFPTYPE_PACKET_OUT,          /* OFPRAW_OFPT10_PACKET_OUT.
 557                                   * OFPRAW_OFPT11_PACKET_OUT. */
 558     OFPTYPE_FLOW_MOD,            /* OFPRAW_OFPT10_FLOW_MOD.
 559                                   * OFPRAW_OFPT11_FLOW_MOD.
 560                                   * OFPRAW_NXT_FLOW_MOD. */
 561     OFPTYPE_GROUP_MOD,           /* OFPRAW_OFPT11_GROUP_MOD.
 562                                   * OFPRAW_OFPT15_GROUP_MOD. */
 563     OFPTYPE_PORT_MOD,            /* OFPRAW_OFPT10_PORT_MOD.
 564                                   * OFPRAW_OFPT11_PORT_MOD.
 565                                   * OFPRAW_OFPT14_PORT_MOD. */
 566     OFPTYPE_TABLE_MOD,           /* OFPRAW_OFPT11_TABLE_MOD.
 567                                   * OFPRAW_OFPT14_TABLE_MOD. */
 568
 569     /* Barrier messages. */
 570     OFPTYPE_BARRIER_REQUEST,     /* OFPRAW_OFPT10_BARRIER_REQUEST.
 571                                   * OFPRAW_OFPT11_BARRIER_REQUEST. */
 572     OFPTYPE_BARRIER_REPLY,       /* OFPRAW_OFPT10_BARRIER_REPLY.
 573                                   * OFPRAW_OFPT11_BARRIER_REPLY. */
 574
 575     /* Queue Configuration messages. */
 576     OFPTYPE_QUEUE_GET_CONFIG_REQUEST, /* OFPRAW_OFPT10_QUEUE_GET_CONFIG_REQUEST.
 577                                        * OFPRAW_OFPT11_QUEUE_GET_CONFIG_REQUEST.
 578                                        * OFPRAW_OFPST14_QUEUE_DESC_REQUEST. */
 579     OFPTYPE_QUEUE_GET_CONFIG_REPLY, /* OFPRAW_OFPT10_QUEUE_GET_CONFIG_REPLY.
 580                                      * OFPRAW_OFPT11_QUEUE_GET_CONFIG_REPLY.
 581                                      * OFPRAW_OFPST14_QUEUE_DESC_REPLY. */
 582
 583     /* Controller role change request messages. */
 584     OFPTYPE_ROLE_REQUEST,         /* OFPRAW_OFPT12_ROLE_REQUEST.
 585                                    * OFPRAW_NXT_ROLE_REQUEST. */
 586     OFPTYPE_ROLE_REPLY,           /* OFPRAW_OFPT12_ROLE_REPLY.
 587                                    * OFPRAW_NXT_ROLE_REPLY. */
 588
 589     /* Asynchronous message configuration. */
 590     OFPTYPE_GET_ASYNC_REQUEST,    /* OFPRAW_OFPT13_GET_ASYNC_REQUEST.
 591                                    * OFPRAW_OFPT14_GET_ASYNC_REQUEST. */
 592     OFPTYPE_GET_ASYNC_REPLY,      /* OFPRAW_OFPT13_GET_ASYNC_REPLY.
 593                                    * OFPRAW_OFPT14_GET_ASYNC_REPLY. */
 594     OFPTYPE_SET_ASYNC_CONFIG,     /* OFPRAW_NXT_SET_ASYNC_CONFIG.
 595                                    * OFPRAW_NXT_SET_ASYNC_CONFIG2.
 596                                    * OFPRAW_OFPT13_SET_ASYNC.
 597                                    * OFPRAW_OFPT14_SET_ASYNC. */
 598
 599     /* Meters and rate limiters configuration messages. */
 600     OFPTYPE_METER_MOD,            /* OFPRAW_OFPT13_METER_MOD. */
 601
 602     /* Controller role change event messages. */
 603     OFPTYPE_ROLE_STATUS,          /* OFPRAW_OFPT14_ROLE_STATUS. */
 604
 605     /* Request forwarding by the switch. */
 606     OFPTYPE_REQUESTFORWARD,       /* OFPRAW_OFPT14_REQUESTFORWARD. */
 607
 608     /* Asynchronous messages. */
 609     OFPTYPE_TABLE_STATUS,          /* OFPRAW_OFPT14_TABLE_STATUS. */
 610
 611     OFPTYPE_BUNDLE_CONTROL,       /* OFPRAW_OFPT14_BUNDLE_CONTROL.
 612                                    * OFPRAW_ONFT13_BUNDLE_CONTROL. */
 613
 614     OFPTYPE_BUNDLE_ADD_MESSAGE,   /* OFPRAW_OFPT14_BUNDLE_ADD_MESSAGE.
 615                                    * OFPRAW_ONFT13_BUNDLE_ADD_MESSAGE. */
 616
 617     /* Statistics. */
 618     OFPTYPE_DESC_STATS_REQUEST,      /* OFPRAW_OFPST_DESC_REQUEST. */
 619     OFPTYPE_DESC_STATS_REPLY,        /* OFPRAW_OFPST_DESC_REPLY. */
 620     OFPTYPE_FLOW_STATS_REQUEST,      /* OFPRAW_OFPST10_FLOW_REQUEST.
 621                                       * OFPRAW_OFPST11_FLOW_REQUEST.
 622                                       * OFPRAW_NXST_FLOW_REQUEST. */
 623     OFPTYPE_FLOW_STATS_REPLY,        /* OFPRAW_OFPST10_FLOW_REPLY.
 624                                       * OFPRAW_OFPST11_FLOW_REPLY.
 625                                       * OFPRAW_OFPST13_FLOW_REPLY.
 626                                       * OFPRAW_NXST_FLOW_REPLY. */
 627     OFPTYPE_AGGREGATE_STATS_REQUEST, /* OFPRAW_OFPST10_AGGREGATE_REQUEST.
 628                                       * OFPRAW_OFPST11_AGGREGATE_REQUEST.
 629                                       * OFPRAW_NXST_AGGREGATE_REQUEST. */
 630     OFPTYPE_AGGREGATE_STATS_REPLY,   /* OFPRAW_OFPST_AGGREGATE_REPLY.
 631                                       * OFPRAW_NXST_AGGREGATE_REPLY. */
 632     OFPTYPE_TABLE_STATS_REQUEST,     /* OFPRAW_OFPST_TABLE_REQUEST. */
 633     OFPTYPE_TABLE_STATS_REPLY,       /* OFPRAW_OFPST10_TABLE_REPLY.
 634                                       * OFPRAW_OFPST11_TABLE_REPLY.
 635                                       * OFPRAW_OFPST12_TABLE_REPLY.
 636                                       * OFPRAW_OFPST13_TABLE_REPLY. */
 637     OFPTYPE_PORT_STATS_REQUEST,      /* OFPRAW_OFPST10_PORT_REQUEST.
 638                                       * OFPRAW_OFPST11_PORT_REQUEST. */
 639     OFPTYPE_PORT_STATS_REPLY,        /* OFPRAW_OFPST10_PORT_REPLY.
 640                                       * OFPRAW_OFPST11_PORT_REPLY.
 641                                       * OFPRAW_OFPST13_PORT_REPLY.
 642                                       * OFPRAW_OFPST14_PORT_REPLY. */
 643     OFPTYPE_QUEUE_STATS_REQUEST,     /* OFPRAW_OFPST10_QUEUE_REQUEST.
 644                                       * OFPRAW_OFPST11_QUEUE_REQUEST. */
 645     OFPTYPE_QUEUE_STATS_REPLY,       /* OFPRAW_OFPST10_QUEUE_REPLY.
 646                                       * OFPRAW_OFPST11_QUEUE_REPLY.
 647                                       * OFPRAW_OFPST13_QUEUE_REPLY.
 648                                       * OFPRAW_OFPST14_QUEUE_REPLY. */
 649
 650     OFPTYPE_GROUP_STATS_REQUEST,     /* OFPRAW_OFPST11_GROUP_REQUEST. */
 651
 652     OFPTYPE_GROUP_STATS_REPLY,       /* OFPRAW_OFPST11_GROUP_REPLY.
 653                                       * OFPRAW_OFPST13_GROUP_REPLY. */
 654
 655     OFPTYPE_GROUP_DESC_STATS_REQUEST, /* OFPRAW_OFPST11_GROUP_DESC_REQUEST.
 656                                        * OFPRAW_OFPST15_GROUP_DESC_REQUEST. */
 657
 658     OFPTYPE_GROUP_DESC_STATS_REPLY,  /* OFPRAW_OFPST11_GROUP_DESC_REPLY. */
 659
 660     OFPTYPE_GROUP_FEATURES_STATS_REQUEST, /* OFPRAW_OFPST12_GROUP_FEATURES_REQUEST. */
 661
 662     OFPTYPE_GROUP_FEATURES_STATS_REPLY, /* OFPRAW_OFPST12_GROUP_FEATURES_REPLY. */
 663
 664     OFPTYPE_METER_STATS_REQUEST,     /* OFPRAW_OFPST13_METER_REQUEST. */
 665
 666     OFPTYPE_METER_STATS_REPLY,       /* OFPRAW_OFPST13_METER_REPLY. */
 667
 668     OFPTYPE_METER_CONFIG_STATS_REQUEST, /* OFPRAW_OFPST13_METER_CONFIG_REQUEST. */
 669
 670     OFPTYPE_METER_CONFIG_STATS_REPLY, /* OFPRAW_OFPST13_METER_CONFIG_REPLY. */
 671
 672     OFPTYPE_METER_FEATURES_STATS_REQUEST, /* OFPRAW_OFPST13_METER_FEATURES_REQUEST. */
 673
 674     OFPTYPE_METER_FEATURES_STATS_REPLY, /* OFPRAW_OFPST13_METER_FEATURES_REPLY. */
 675
 676     OFPTYPE_TABLE_FEATURES_STATS_REQUEST, /* OFPRAW_OFPST13_TABLE_FEATURES_REQUEST. */
 677
 678     OFPTYPE_TABLE_FEATURES_STATS_REPLY, /* OFPRAW_OFPST13_TABLE_FEATURES_REPLY. */
 679
 680     OFPTYPE_TABLE_DESC_REQUEST,      /* OFPRAW_OFPST14_TABLE_DESC_REQUEST. */
 681
 682     OFPTYPE_TABLE_DESC_REPLY,        /* OFPRAW_OFPST14_TABLE_DESC_REPLY. */
 683
 684     OFPTYPE_PORT_DESC_STATS_REQUEST, /* OFPRAW_OFPST10_PORT_DESC_REQUEST.
 685                                       * OFPRAW_OFPST15_PORT_DESC_REQUEST. */
 686
 687     OFPTYPE_PORT_DESC_STATS_REPLY,   /* OFPRAW_OFPST10_PORT_DESC_REPLY.
 688                                       * OFPRAW_OFPST11_PORT_DESC_REPLY.
 689                                       * OFPRAW_OFPST14_PORT_DESC_REPLY. */
 690
 691     OFPTYPE_FLOW_MONITOR_STATS_REQUEST, /* OFPRAW_OFPST14_FLOW_MONITOR_REQUEST.
 692                                          * OFPRAW_NXST_FLOW_MONITOR_REQUEST. */
 693     OFPTYPE_FLOW_MONITOR_STATS_REPLY,   /* OFPRAW_OFPST14_FLOW_MONITOR_REPLY.
 694                                          * OFPRAW_NXST_FLOW_MONITOR_REPLY. */
 695
 696     /* Nicira extensions. */
 697     OFPTYPE_SET_FLOW_FORMAT,      /* OFPRAW_NXT_SET_FLOW_FORMAT. */
 698     OFPTYPE_FLOW_MOD_TABLE_ID,    /* OFPRAW_NXT_FLOW_MOD_TABLE_ID. */
 699     OFPTYPE_SET_PACKET_IN_FORMAT, /* OFPRAW_NXT_SET_PACKET_IN_FORMAT. */
 700     OFPTYPE_FLOW_AGE,             /* OFPRAW_NXT_FLOW_AGE. */
 701     OFPTYPE_SET_CONTROLLER_ID,    /* OFPRAW_NXT_SET_CONTROLLER_ID. */
 702     OFPTYPE_NXT_TLV_TABLE_MOD, /* OFPRAW_NXT_TLV_TABLE_MOD. */
 703     OFPTYPE_NXT_TLV_TABLE_REQUEST, /* OFPRAW_NXT_TLV_TABLE_REQUEST. */
 704     OFPTYPE_NXT_TLV_TABLE_REPLY, /* OFPRAW_NXT_TLV_TABLE_REPLY. */
 705     OFPTYPE_NXT_RESUME,          /* OFPRAW_NXT_RESUME. */
 706     OFPTYPE_IPFIX_BRIDGE_STATS_REQUEST, /* OFPRAW_NXST_IPFIX_BRIDGE_REQUEST */
 707     OFPTYPE_IPFIX_BRIDGE_STATS_REPLY, /* OFPRAW_NXST_IPFIX_BRIDGE_REPLY */
 708     OFPTYPE_IPFIX_FLOW_STATS_REQUEST, /* OFPRAW_NXST_IPFIX_FLOW_REQUEST */
 709     OFPTYPE_IPFIX_FLOW_STATS_REPLY,   /* OFPRAW_NXST_IPFIX_FLOW_REPLY */
 710
 711     /* Flow monitor extension. */
 712     OFPTYPE_FLOW_MONITOR_CANCEL,        /* OFPRAW_NXT_FLOW_MONITOR_CANCEL. */
 713     OFPTYPE_FLOW_MONITOR_PAUSED,        /* OFPRAW_NXT_FLOW_MONITOR_PAUSED. */
 714     OFPTYPE_FLOW_MONITOR_RESUMED,       /* OFPRAW_NXT_FLOW_MONITOR_RESUMED. */
 715 };
 716
 717 /* Decoding messages into OFPTYPE_* values. */
 718 enum ofperr ofptype_decode(enum ofptype *, const struct ofp_header *);
 719 enum ofperr ofptype_pull(enum ofptype *, struct ofpbuf *);
 720 enum ofptype ofptype_from_ofpraw(enum ofpraw);
 721
 722 /* Information about OFTYPE_* values. */
 723 const char *ofptype_get_name(enum ofptype);
 724 \f
 725 /* OpenFlow message properties. */
 726 void ofpmsg_update_length(struct ofpbuf *);
 727 const void *ofpmsg_body(const struct ofp_header *);
 728 bool ofpmsg_is_stat_request(const struct ofp_header *);
 729 \f
 730 /* Multipart messages (aka "statistics").
 731  *
 732  * Individual OpenFlow messages are limited to 64 kB in size, but some messages
 733  * need to be longer.  Therefore, multipart messages allow a longer message to
 734  * be divided into multiple parts at some convenient boundary.  For example,
 735  * limiting the response to a "flow dump" request to 64 kB would unreasonably
 736  * limit the maximum number of flows in an OpenFlow switch, so a "flow dump" is
 737  * expressed as a multipart request/reply pair, with the reply broken into
 738  * pieces between flows.
 739  *
 740  * Multipart messages always consist of a request/reply pair.
 741  *
 742  * In OpenFlow 1.0, 1.1, and 1.2, requests must always fit in a single message,
 743  * that is, only a multipart reply may have more than one part.  OpenFlow 1.3
 744  * adds one multipart request.  This code does not yet support multipart
 745  * requests. */
 746
 747 /* Encoding multipart replies.
 748  *
 749  * These functions are useful for multipart replies that might really require
 750  * more than one message.  A multipart message that is known in advance to fit
 751  * within 64 kB doesn't need any special treatment, so you might as well use
 752  * the ofpraw_alloc_*() functions.
 753  *
 754  * These functions work with a "struct ovs_list" of "struct ofpbuf"s, each of
 755  * which represents one part of a multipart message. */
 756 void ofpmp_init(struct ovs_list *, const struct ofp_header *request);
 757 struct ofpbuf *ofpmp_reserve(struct ovs_list *, size_t len);
 758 void *ofpmp_append(struct ovs_list *, size_t len);
 759 void ofpmp_postappend(struct ovs_list *, size_t start_ofs);
 760
 761 enum ofp_version ofpmp_version(struct ovs_list *);
 762 enum ofpraw ofpmp_decode_raw(struct ovs_list *);
 763
 764 /* Decoding multipart replies. */
 765 uint16_t ofpmp_flags(const struct ofp_header *);
 766 bool ofpmp_more(const struct ofp_header *);
 767
 768 #endif /* ofp-msgs.h */