lib/ofp-msgs.h

   1 /*
   2  * Copyright (c) 2012 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 OFP_MSGS_H
  18 #define 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/types.h"
  42 #include "ofp-errors.h"
  43 #include "util.h"
  44
  45 struct 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 OFPT (standard OpenFlow message), OFPST (standard OpenFlow
  64  *      statistics message), NXT (Nicira extension message), or NXST (Nicira
  65  *      extension statistics message).
  66  *
  67  *      As new vendors implement extensions it will make sense to expand the
  68  *      dictionary of possible types.
  69  *
  70  *    - versions: The OpenFlow version or versions in which this message is
  71  *      supported, e.g. "1.0" or "1.1" or "1.0+".
  72  *
  73  *    - number:
  74  *         For OFPT, the 'type' in struct ofp_header.
  75  *         For OFPST, the 'type' in struct ofp_stats_msg or ofp11_stats_msg.
  76  *         For NXT, the 'subtype' in struct nicira_header.
  77  *         For NXST, the 'subtype' in struct nicira10_stats_msg or
  78  *           nicira11_stats_msg.
  79  *
  80  *    - arguments: The types of data that follow the OpenFlow headers (the
  81  *      message "body").  This can be "void" if the message has no body.
  82  *      Otherwise, it should be a comma-separated sequence of C types.  The
  83  *      last type in the sequence can end with [] if the body ends in a
  84  *      variable-length sequence.
  85  *
  86  *      The arguments are used to validate the lengths of messages when a
  87  *      header is parsed.  Any message whose length isn't valid as a length of
  88  *      the specified types will be rejected with OFPERR_OFPBRC_BAD_LEN.
  89  *
  90  *      A few OpenFlow messages, such as OFPT_PACKET_IN, intentionally end with
  91  *      only part of a structure, up to some specified member.  The syntax "up
  92  *      to <member>" indicates this, e.g. "struct ofp11_packet_in up to data".
  93  */
  94 enum ofpraw {
  95 /* Immutable standard messages.
  96  *
  97  * The OpenFlow standard promises to preserve these messages and their numbers
  98  * in future versions, so we mark them as <all>, which covers every OpenFlow
  99  * version numbered 0x01...0xff, rather than as OF1.0+, which covers only
 100  * OpenFlow versions that we otherwise implement.
 101  *
 102  * Without <all> here, then we would fail to decode "hello" messages that
 103  * announce a version higher than we understand, even though there still could
 104  * be a version in common with the peer that we do understand.  The <all>
 105  * keyword is less useful for the other messages, because our OpenFlow channels
 106  * accept only OpenFlow messages with a previously negotiated version.
 107  */
 108
 109     /* OFPT <all> (0): uint8_t[]. */
 110     OFPRAW_OFPT_HELLO,
 111
 112     /* OFPT <all> (1): struct ofp_error_msg, uint8_t[]. */
 113     OFPRAW_OFPT_ERROR,
 114
 115     /* OFPT <all> (2): uint8_t[]. */
 116     OFPRAW_OFPT_ECHO_REQUEST,
 117
 118     /* OFPT <all> (3): uint8_t[]. */
 119     OFPRAW_OFPT_ECHO_REPLY,
 120
 121 /* Other standard messages.
 122  *
 123  * The meanings of these messages can (and often do) change from one version
 124  * of OpenFlow to another. */
 125
 126     /* OFPT 1.0+ (5): void. */
 127     OFPRAW_OFPT_FEATURES_REQUEST,
 128
 129     /* OFPT 1.0 (6): struct ofp_switch_features, struct ofp10_phy_port[]. */
 130     OFPRAW_OFPT10_FEATURES_REPLY,
 131     /* OFPT 1.1-1.2 (6): struct ofp_switch_features, struct ofp11_port[]. */
 132     OFPRAW_OFPT11_FEATURES_REPLY,
 133     /* OFPT 1.3+ (6): struct ofp_switch_features. */
 134     OFPRAW_OFPT13_FEATURES_REPLY,
 135
 136     /* OFPT 1.0+ (7): void. */
 137     OFPRAW_OFPT_GET_CONFIG_REQUEST,
 138
 139     /* OFPT 1.0+ (8): struct ofp_switch_config. */
 140     OFPRAW_OFPT_GET_CONFIG_REPLY,
 141
 142     /* OFPT 1.0+ (9): struct ofp_switch_config. */
 143     OFPRAW_OFPT_SET_CONFIG,
 144
 145     /* OFPT 1.0 (10): struct ofp10_packet_in up to data, uint8_t[]. */
 146     OFPRAW_OFPT10_PACKET_IN,
 147     /* OFPT 1.1 (10): struct ofp11_packet_in, uint8_t[]. */
 148     OFPRAW_OFPT11_PACKET_IN,
 149     /* OFPT 1.2 (10): struct ofp12_packet_in, uint8_t[]. */
 150     OFPRAW_OFPT12_PACKET_IN,
 151     /* OFPT 1.3 (10): struct ofp13_packet_in, uint8_t[]. */
 152     OFPRAW_OFPT13_PACKET_IN,
 153     /* NXT 1.0+ (17): struct nx_packet_in, uint8_t[]. */
 154     OFPRAW_NXT_PACKET_IN,
 155
 156     /* OFPT 1.0 (11): struct ofp10_flow_removed. */
 157     OFPRAW_OFPT10_FLOW_REMOVED,
 158     /* OFPT 1.1+ (11): struct ofp11_flow_removed, uint8_t[8][]. */
 159     OFPRAW_OFPT11_FLOW_REMOVED,
 160     /* NXT 1.0+ (14): struct nx_flow_removed, uint8_t[8][]. */
 161     OFPRAW_NXT_FLOW_REMOVED,
 162
 163     /* OFPT 1.0 (12): struct ofp_port_status, struct ofp10_phy_port. */
 164     OFPRAW_OFPT10_PORT_STATUS,
 165     /* OFPT 1.1+ (12): struct ofp_port_status, struct ofp11_port. */
 166     OFPRAW_OFPT11_PORT_STATUS,
 167
 168     /* OFPT 1.0 (13): struct ofp10_packet_out, uint8_t[]. */
 169     OFPRAW_OFPT10_PACKET_OUT,
 170     /* OFPT 1.1+ (13): struct ofp11_packet_out, uint8_t[]. */
 171     OFPRAW_OFPT11_PACKET_OUT,
 172
 173     /* OFPT 1.0 (14): struct ofp10_flow_mod, struct ofp_action_header[]. */
 174     OFPRAW_OFPT10_FLOW_MOD,
 175     /* OFPT 1.1+ (14): struct ofp11_flow_mod, struct ofp11_instruction[]. */
 176     OFPRAW_OFPT11_FLOW_MOD,
 177     /* NXT 1.0+ (13): struct nx_flow_mod, uint8_t[8][]. */
 178     OFPRAW_NXT_FLOW_MOD,
 179
 180     /* OFPT 1.0 (15): struct ofp10_port_mod. */
 181     OFPRAW_OFPT10_PORT_MOD,
 182     /* OFPT 1.1+ (16): struct ofp11_port_mod. */
 183     OFPRAW_OFPT11_PORT_MOD,
 184
 185     /* OFPT 1.0 (18): void. */
 186     OFPRAW_OFPT10_BARRIER_REQUEST,
 187     /* OFPT 1.1+ (20): void. */
 188     OFPRAW_OFPT11_BARRIER_REQUEST,
 189
 190     /* OFPT 1.0 (19): void. */
 191     OFPRAW_OFPT10_BARRIER_REPLY,
 192     /* OFPT 1.1+ (21): void. */
 193     OFPRAW_OFPT11_BARRIER_REPLY,
 194
 195     /* OFPT 1.1+ (22): struct ofp11_queue_get_config_request. */
 196     OFPRAW_OFPT11_QUEUE_GET_CONFIG_REQUEST,
 197
 198     /* OFPT 1.1+ (23): struct ofp11_queue_get_config_reply, struct ofp_packet_queue[]. */
 199     OFPRAW_OFPT11_QUEUE_GET_CONFIG_REPLY,
 200
 201     /* OFPT 1.2+ (24): struct ofp12_role_request. */
 202     OFPRAW_OFPT12_ROLE_REQUEST,
 203     /* NXT 1.0+ (10): struct nx_role_request. */
 204     OFPRAW_NXT_ROLE_REQUEST,
 205
 206     /* OFPT 1.2+ (25): struct ofp12_role_request. */
 207     OFPRAW_OFPT12_ROLE_REPLY,
 208     /* NXT 1.0+ (11): struct nx_role_request. */
 209     OFPRAW_NXT_ROLE_REPLY,
 210
 211     /* OFPT 1.3+ (26): void. */
 212     OFPRAW_OFPT13_GET_ASYNC_REQUEST,
 213     /* OFPT 1.3+ (27): struct ofp13_async_config. */
 214     OFPRAW_OFPT13_GET_ASYNC_REPLY,
 215     /* OFPT 1.3+ (28): struct ofp13_async_config. */
 216     OFPRAW_OFPT13_SET_ASYNC,
 217     /* NXT 1.0+ (19): struct nx_async_config. */
 218     OFPRAW_NXT_SET_ASYNC_CONFIG,
 219
 220     /* OFPT 1.3+ (29): struct ofp13_meter_mod. */
 221     OFPRAW_OFPT13_METER_MOD,
 222
 223 /* Standard statistics. */
 224
 225     /* OFPST 1.0+ (0): void. */
 226     OFPRAW_OFPST_DESC_REQUEST,
 227
 228     /* OFPST 1.0+ (0): struct ofp_desc_stats. */
 229     OFPRAW_OFPST_DESC_REPLY,
 230
 231     /* OFPST 1.0 (1): struct ofp10_flow_stats_request. */
 232     OFPRAW_OFPST10_FLOW_REQUEST,
 233     /* OFPST 1.1+ (1): struct ofp11_flow_stats_request, uint8_t[8][]. */
 234     OFPRAW_OFPST11_FLOW_REQUEST,
 235     /* NXST 1.0 (0): struct nx_flow_stats_request, uint8_t[8][]. */
 236     OFPRAW_NXST_FLOW_REQUEST,
 237
 238     /* OFPST 1.0 (1): uint8_t[]. */
 239     OFPRAW_OFPST10_FLOW_REPLY,
 240     /* OFPST 1.1-1.2 (1): uint8_t[]. */
 241     OFPRAW_OFPST11_FLOW_REPLY,
 242     /* OFPST 1.3+ (1): uint8_t[]. */
 243     OFPRAW_OFPST13_FLOW_REPLY,
 244     /* NXST 1.0 (0): uint8_t[]. */
 245     OFPRAW_NXST_FLOW_REPLY,
 246
 247     /* OFPST 1.0 (2): struct ofp10_flow_stats_request. */
 248     OFPRAW_OFPST10_AGGREGATE_REQUEST,
 249     /* OFPST 1.1+ (2): struct ofp11_flow_stats_request, uint8_t[8][]. */
 250     OFPRAW_OFPST11_AGGREGATE_REQUEST,
 251     /* NXST 1.0 (1): struct nx_flow_stats_request, uint8_t[8][]. */
 252     OFPRAW_NXST_AGGREGATE_REQUEST,
 253
 254     /* OFPST 1.0+ (2): struct ofp_aggregate_stats_reply. */
 255     OFPRAW_OFPST_AGGREGATE_REPLY,
 256     /* NXST 1.0 (1): struct ofp_aggregate_stats_reply. */
 257     OFPRAW_NXST_AGGREGATE_REPLY,
 258
 259     /* OFPST 1.0+ (3): void. */
 260     OFPRAW_OFPST_TABLE_REQUEST,
 261
 262     /* OFPST 1.0 (3): struct ofp10_table_stats[]. */
 263     OFPRAW_OFPST10_TABLE_REPLY,
 264     /* OFPST 1.1 (3): struct ofp11_table_stats[]. */
 265     OFPRAW_OFPST11_TABLE_REPLY,
 266     /* OFPST 1.2 (3): struct ofp12_table_stats[]. */
 267     OFPRAW_OFPST12_TABLE_REPLY,
 268     /* OFPST 1.3 (3): struct ofp13_table_stats[]. */
 269     OFPRAW_OFPST13_TABLE_REPLY,
 270
 271     /* OFPST 1.0 (4): struct ofp10_port_stats_request. */
 272     OFPRAW_OFPST10_PORT_REQUEST,
 273     /* OFPST 1.1+ (4): struct ofp11_port_stats_request. */
 274     OFPRAW_OFPST11_PORT_REQUEST,
 275
 276     /* OFPST 1.0 (4): struct ofp10_port_stats[]. */
 277     OFPRAW_OFPST10_PORT_REPLY,
 278     /* OFPST 1.1-1.2 (4): struct ofp11_port_stats[]. */
 279     OFPRAW_OFPST11_PORT_REPLY,
 280     /* OFPST 1.3+ (4): struct ofp13_port_stats[]. */
 281     OFPRAW_OFPST13_PORT_REPLY,
 282
 283     /* OFPST 1.0 (5): struct ofp10_queue_stats_request. */
 284     OFPRAW_OFPST10_QUEUE_REQUEST,
 285     /* OFPST 1.1+ (5): struct ofp11_queue_stats_request. */
 286     OFPRAW_OFPST11_QUEUE_REQUEST,
 287
 288     /* OFPST 1.0 (5): struct ofp10_queue_stats[]. */
 289     OFPRAW_OFPST10_QUEUE_REPLY,
 290     /* OFPST 1.1-1.2 (5): struct ofp11_queue_stats[]. */
 291     OFPRAW_OFPST11_QUEUE_REPLY,
 292     /* OFPST 1.3+ (5): struct ofp13_queue_stats[]. */
 293     OFPRAW_OFPST13_QUEUE_REPLY,
 294
 295     /* OFPST 1.1+ (6): struct ofp11_group_stats_request. */
 296     OFPRAW_OFPST11_GROUP_REQUEST,
 297
 298     /* OFPST 1.1-1.2 (6): struct ofp11_group_stats[]. */
 299     OFPRAW_OFPST11_GROUP_REPLY,
 300     /* OFPST 1.3 (6): struct ofp13_group_stats[]. */
 301     OFPRAW_OFPST13_GROUP_REPLY,
 302
 303     /* OFPST 1.1+ (7): void. */
 304     OFPRAW_OFPST11_GROUP_DESC_REQUEST,
 305
 306     /* OFPST 1.1+ (7): struct ofp11_group_desc_stats[]. */
 307     OFPRAW_OFPST11_GROUP_DESC_REPLY,
 308
 309     /* OFPST 1.2+ (8): void. */
 310     OFPRAW_OFPST12_GROUP_FEATURES_REQUEST,
 311
 312     /* OFPST 1.2+ (8): struct ofp12_group_features_stats. */
 313     OFPRAW_OFPST12_GROUP_FEATURES_REPLY,
 314
 315     /* OFPST 1.3+ (9): struct ofp13_meter_multipart_request. */
 316     OFPRAW_OFPST13_METER_REQUEST,
 317
 318     /* OFPST 1.3+ (9): struct ofp13_meter_stats[]. */
 319     OFPRAW_OFPST13_METER_REPLY,
 320
 321     /* OFPST 1.3+ (10): struct ofp13_meter_multipart_request. */
 322     OFPRAW_OFPST13_METER_CONFIG_REQUEST,
 323
 324     /* OFPST 1.3+ (10): struct ofp13_meter_config[]. */
 325     OFPRAW_OFPST13_METER_CONFIG_REPLY,
 326
 327     /* OFPST 1.3+ (11): void. */
 328     OFPRAW_OFPST13_METER_FEATURES_REQUEST,
 329
 330     /* OFPST 1.3+ (11): struct ofp13_meter_features. */
 331     OFPRAW_OFPST13_METER_FEATURES_REPLY,
 332
 333     /* OFPST 1.3+ (12): struct ofp13_table_features[]. */
 334     OFPRAW_OFPST13_TABLE_FEATURES_REQUEST,
 335
 336     /* OFPST 1.3+ (12): struct ofp13_table_features[]. */
 337     OFPRAW_OFPST13_TABLE_FEATURES_REPLY,
 338
 339     /* OFPST 1.0+ (13): void. */
 340     OFPRAW_OFPST_PORT_DESC_REQUEST,
 341
 342     /* OFPST 1.0 (13): struct ofp10_phy_port[]. */
 343     OFPRAW_OFPST10_PORT_DESC_REPLY,
 344     /* OFPST 1.1+ (13): struct ofp11_port[]. */
 345     OFPRAW_OFPST11_PORT_DESC_REPLY,
 346
 347 /* Nicira extension messages.
 348  *
 349  * Nicira extensions that correspond to standard OpenFlow messages are listed
 350  * alongside the standard versions above. */
 351
 352     /* NXT 1.0 (12): struct nx_set_flow_format. */
 353     OFPRAW_NXT_SET_FLOW_FORMAT,
 354
 355     /* NXT 1.0+ (15): struct nx_flow_mod_table_id. */
 356     OFPRAW_NXT_FLOW_MOD_TABLE_ID,
 357
 358     /* NXT 1.0+ (16): struct nx_set_packet_in_format. */
 359     OFPRAW_NXT_SET_PACKET_IN_FORMAT,
 360
 361     /* NXT 1.0+ (18): void. */
 362     OFPRAW_NXT_FLOW_AGE,
 363
 364     /* NXT 1.0+ (20): struct nx_controller_id. */
 365     OFPRAW_NXT_SET_CONTROLLER_ID,
 366
 367     /* NXT 1.0+ (21): struct nx_flow_monitor_cancel. */
 368     OFPRAW_NXT_FLOW_MONITOR_CANCEL,
 369
 370     /* NXT 1.0+ (22): void. */
 371     OFPRAW_NXT_FLOW_MONITOR_PAUSED,
 372
 373     /* NXT 1.0+ (23): void. */
 374     OFPRAW_NXT_FLOW_MONITOR_RESUMED,
 375
 376 /* Nicira extension statistics.
 377  *
 378  * Nicira extension statistics that correspond to standard OpenFlow statistics
 379  * are listed alongside the standard versions above. */
 380
 381     /* NXST 1.0 (2): uint8_t[8][]. */
 382     OFPRAW_NXST_FLOW_MONITOR_REQUEST,
 383
 384     /* NXST 1.0 (2): uint8_t[8][]. */
 385     OFPRAW_NXST_FLOW_MONITOR_REPLY,
 386 };
 387
 388 /* Decoding messages into OFPRAW_* values. */
 389 enum ofperr ofpraw_decode(enum ofpraw *, const struct ofp_header *);
 390 enum ofperr ofpraw_pull(enum ofpraw *, struct ofpbuf *);
 391 enum ofpraw ofpraw_pull_assert(struct ofpbuf *);
 392
 393 enum ofperr ofpraw_decode_partial(enum ofpraw *,
 394                                   const struct ofp_header *, size_t length);
 395
 396 /* Encoding messages using OFPRAW_* values. */
 397 struct ofpbuf *ofpraw_alloc(enum ofpraw, uint8_t ofp_version,
 398                             size_t extra_tailroom);
 399 struct ofpbuf *ofpraw_alloc_xid(enum ofpraw, uint8_t ofp_version,
 400                                 ovs_be32 xid, size_t extra_tailroom);
 401 struct ofpbuf *ofpraw_alloc_reply(enum ofpraw,
 402                                   const struct ofp_header *request,
 403                                   size_t extra_tailroom);
 404 struct ofpbuf *ofpraw_alloc_stats_reply(const struct ofp_header *request,
 405                                         size_t extra_tailroom);
 406
 407 void ofpraw_put(enum ofpraw, uint8_t ofp_version, struct ofpbuf *);
 408 void ofpraw_put_xid(enum ofpraw, uint8_t ofp_version, ovs_be32 xid,
 409                     struct ofpbuf *);
 410 void ofpraw_put_reply(enum ofpraw, const struct ofp_header *request,
 411                       struct ofpbuf *);
 412 void ofpraw_put_stats_reply(const struct ofp_header *request, struct ofpbuf *);
 413
 414 /* Information about OFPRAW_* values. */
 415 const char *ofpraw_get_name(enum ofpraw);
 416 enum ofpraw ofpraw_stats_request_to_reply(enum ofpraw, uint8_t version);
 417 \f
 418 /* Semantic identifiers for OpenFlow messages.
 419  *
 420  * Each OFPTYPE_* enumeration constant represents one or more concrete format
 421  * of OpenFlow message.  When two variants of a message have essentially the
 422  * same meaning, they are assigned a single OFPTYPE_* value.
 423  *
 424  * The comments here must follow a stylized form because the "extract-ofp-msgs"
 425  * program parses them at build time to generate data tables.  The format is
 426  * simply to list each OFPRAW_* enumeration constant for a given OFPTYPE_*,
 427  * each followed by a period. */
 428 enum ofptype {
 429     /* Immutable messages. */
 430     OFPTYPE_HELLO,               /* OFPRAW_OFPT_HELLO. */
 431     OFPTYPE_ERROR,               /* OFPRAW_OFPT_ERROR. */
 432     OFPTYPE_ECHO_REQUEST,        /* OFPRAW_OFPT_ECHO_REQUEST. */
 433     OFPTYPE_ECHO_REPLY,          /* OFPRAW_OFPT_ECHO_REPLY. */
 434
 435     /* Switch configuration messages. */
 436     OFPTYPE_FEATURES_REQUEST,    /* OFPRAW_OFPT_FEATURES_REQUEST. */
 437     OFPTYPE_FEATURES_REPLY,      /* OFPRAW_OFPT10_FEATURES_REPLY.
 438                                   * OFPRAW_OFPT11_FEATURES_REPLY.
 439                                   * OFPRAW_OFPT13_FEATURES_REPLY. */
 440     OFPTYPE_GET_CONFIG_REQUEST,  /* OFPRAW_OFPT_GET_CONFIG_REQUEST. */
 441     OFPTYPE_GET_CONFIG_REPLY,    /* OFPRAW_OFPT_GET_CONFIG_REPLY. */
 442     OFPTYPE_SET_CONFIG,          /* OFPRAW_OFPT_SET_CONFIG. */
 443
 444     /* Asynchronous messages. */
 445     OFPTYPE_PACKET_IN,           /* OFPRAW_OFPT10_PACKET_IN.
 446                                   * OFPRAW_OFPT11_PACKET_IN.
 447                                   * OFPRAW_OFPT12_PACKET_IN.
 448                                   * OFPRAW_OFPT13_PACKET_IN.
 449                                   * OFPRAW_NXT_PACKET_IN. */
 450     OFPTYPE_FLOW_REMOVED,        /* OFPRAW_OFPT10_FLOW_REMOVED.
 451                                   * OFPRAW_OFPT11_FLOW_REMOVED.
 452                                   * OFPRAW_NXT_FLOW_REMOVED. */
 453     OFPTYPE_PORT_STATUS,         /* OFPRAW_OFPT10_PORT_STATUS.
 454                                   * OFPRAW_OFPT11_PORT_STATUS. */
 455
 456     /* Controller command messages. */
 457     OFPTYPE_PACKET_OUT,          /* OFPRAW_OFPT10_PACKET_OUT.
 458                                   * OFPRAW_OFPT11_PACKET_OUT. */
 459     OFPTYPE_FLOW_MOD,            /* OFPRAW_OFPT10_FLOW_MOD.
 460                                   * OFPRAW_OFPT11_FLOW_MOD.
 461                                   * OFPRAW_NXT_FLOW_MOD. */
 462     OFPTYPE_PORT_MOD,            /* OFPRAW_OFPT10_PORT_MOD.
 463                                   * OFPRAW_OFPT11_PORT_MOD. */
 464
 465     /* Barrier messages. */
 466     OFPTYPE_BARRIER_REQUEST,     /* OFPRAW_OFPT10_BARRIER_REQUEST.
 467                                   * OFPRAW_OFPT11_BARRIER_REQUEST. */
 468     OFPTYPE_BARRIER_REPLY,       /* OFPRAW_OFPT10_BARRIER_REPLY.
 469                                   * OFPRAW_OFPT11_BARRIER_REPLY. */
 470
 471     /* Queue Configuration messages. */
 472     OFPTYPE_QUEUE_GET_CONFIG_REQUEST, /* OFPRAW_OFPT11_QUEUE_GET_CONFIG_REQUEST. */
 473     OFPTYPE_QUEUE_GET_CONFIG_REPLY, /* OFPRAW_OFPT11_QUEUE_GET_CONFIG_REPLY. */
 474
 475     /* Controller role change request messages. */
 476     OFPTYPE_ROLE_REQUEST,         /* OFPRAW_OFPT12_ROLE_REQUEST.
 477                                    * OFPRAW_NXT_ROLE_REQUEST. */
 478     OFPTYPE_ROLE_REPLY,           /* OFPRAW_OFPT12_ROLE_REPLY.
 479                                    * OFPRAW_NXT_ROLE_REPLY. */
 480
 481     /* Asynchronous message configuration. */
 482     OFPTYPE_GET_ASYNC_REQUEST,    /* OFPRAW_OFPT13_GET_ASYNC_REQUEST. */
 483     OFPTYPE_GET_ASYNC_REPLY,      /* OFPRAW_OFPT13_GET_ASYNC_REPLY. */
 484     OFPTYPE_SET_ASYNC_CONFIG,     /* OFPRAW_NXT_SET_ASYNC_CONFIG.
 485                                    * OFPRAW_OFPT13_SET_ASYNC. */
 486
 487     /* Meters and rate limiters configuration messages. */
 488     OFPTYPE_METER_MOD,            /* OFPRAW_OFPT13_METER_MOD. */
 489
 490     /* Statistics. */
 491     OFPTYPE_DESC_STATS_REQUEST,      /* OFPRAW_OFPST_DESC_REQUEST. */
 492     OFPTYPE_DESC_STATS_REPLY,        /* OFPRAW_OFPST_DESC_REPLY. */
 493     OFPTYPE_FLOW_STATS_REQUEST,      /* OFPRAW_OFPST10_FLOW_REQUEST.
 494                                       * OFPRAW_OFPST11_FLOW_REQUEST.
 495                                       * OFPRAW_NXST_FLOW_REQUEST. */
 496     OFPTYPE_FLOW_STATS_REPLY,        /* OFPRAW_OFPST10_FLOW_REPLY.
 497                                       * OFPRAW_OFPST11_FLOW_REPLY.
 498                                       * OFPRAW_OFPST13_FLOW_REPLY.
 499                                       * OFPRAW_NXST_FLOW_REPLY. */
 500     OFPTYPE_AGGREGATE_STATS_REQUEST, /* OFPRAW_OFPST10_AGGREGATE_REQUEST.
 501                                       * OFPRAW_OFPST11_AGGREGATE_REQUEST.
 502                                       * OFPRAW_NXST_AGGREGATE_REQUEST. */
 503     OFPTYPE_AGGREGATE_STATS_REPLY,   /* OFPRAW_OFPST_AGGREGATE_REPLY.
 504                                       * OFPRAW_NXST_AGGREGATE_REPLY. */
 505     OFPTYPE_TABLE_STATS_REQUEST,     /* OFPRAW_OFPST_TABLE_REQUEST. */
 506     OFPTYPE_TABLE_STATS_REPLY,       /* OFPRAW_OFPST10_TABLE_REPLY.
 507                                       * OFPRAW_OFPST11_TABLE_REPLY.
 508                                       * OFPRAW_OFPST12_TABLE_REPLY.
 509                                       * OFPRAW_OFPST13_TABLE_REPLY. */
 510     OFPTYPE_PORT_STATS_REQUEST,      /* OFPRAW_OFPST10_PORT_REQUEST.
 511                                       * OFPRAW_OFPST11_PORT_REQUEST. */
 512     OFPTYPE_PORT_STATS_REPLY,        /* OFPRAW_OFPST10_PORT_REPLY.
 513                                       * OFPRAW_OFPST11_PORT_REPLY.
 514                                       * OFPRAW_OFPST13_PORT_REPLY. */
 515     OFPTYPE_QUEUE_STATS_REQUEST,     /* OFPRAW_OFPST10_QUEUE_REQUEST.
 516                                       * OFPRAW_OFPST11_QUEUE_REQUEST. */
 517     OFPTYPE_QUEUE_STATS_REPLY,       /* OFPRAW_OFPST10_QUEUE_REPLY.
 518                                       * OFPRAW_OFPST11_QUEUE_REPLY.
 519                                       * OFPRAW_OFPST13_QUEUE_REPLY. */
 520
 521     OFPTYPE_GROUP_REQUEST,           /* OFPRAW_OFPST11_GROUP_REQUEST. */
 522
 523     OFPTYPE_GROUP_REPLY,             /* OFPRAW_OFPST11_GROUP_REPLY.
 524                                       * OFPRAW_OFPST13_GROUP_REPLY. */
 525
 526     OFPTYPE_GROUP_DESC_REQUEST,      /* OFPRAW_OFPST11_GROUP_DESC_REQUEST. */
 527
 528     OFPTYPE_GROUP_DESC_REPLY,        /* OFPRAW_OFPST11_GROUP_DESC_REPLY. */
 529
 530     OFPTYPE_GROUP_FEATURES_REQUEST, /* OFPRAW_OFPST12_GROUP_FEATURES_REQUEST. */
 531
 532     OFPTYPE_GROUP_FEATURES_REPLY,    /* OFPRAW_OFPST12_GROUP_FEATURES_REPLY. */
 533
 534     OFPTYPE_METER_REQUEST,           /* OFPRAW_OFPST13_METER_REQUEST. */
 535
 536     OFPTYPE_METER_REPLY,             /* OFPRAW_OFPST13_METER_REPLY. */
 537
 538     OFPTYPE_METER_CONFIG_REQUEST,    /* OFPRAW_OFPST13_METER_CONFIG_REQUEST. */
 539
 540     OFPTYPE_METER_CONFIG_REPLY,      /* OFPRAW_OFPST13_METER_CONFIG_REPLY. */
 541
 542     OFPTYPE_METER_FEATURES_REQUEST, /* OFPRAW_OFPST13_METER_FEATURES_REQUEST. */
 543
 544     OFPTYPE_METER_FEATURES_REPLY,    /* OFPRAW_OFPST13_METER_FEATURES_REPLY. */
 545
 546     OFPTYPE_TABLE_FEATURES_REQUEST, /* OFPRAW_OFPST13_TABLE_FEATURES_REQUEST. */
 547
 548     OFPTYPE_TABLE_FEATURES_REPLY,    /* OFPRAW_OFPST13_TABLE_FEATURES_REPLY. */
 549
 550     OFPTYPE_PORT_DESC_STATS_REQUEST, /* OFPRAW_OFPST_PORT_DESC_REQUEST. */
 551
 552     OFPTYPE_PORT_DESC_STATS_REPLY,   /* OFPRAW_OFPST10_PORT_DESC_REPLY.
 553                                       * OFPRAW_OFPST11_PORT_DESC_REPLY. */
 554
 555     /* Nicira extensions. */
 556     OFPTYPE_SET_FLOW_FORMAT,      /* OFPRAW_NXT_SET_FLOW_FORMAT. */
 557     OFPTYPE_FLOW_MOD_TABLE_ID,    /* OFPRAW_NXT_FLOW_MOD_TABLE_ID. */
 558     OFPTYPE_SET_PACKET_IN_FORMAT, /* OFPRAW_NXT_SET_PACKET_IN_FORMAT. */
 559     OFPTYPE_FLOW_AGE,             /* OFPRAW_NXT_FLOW_AGE. */
 560     OFPTYPE_SET_CONTROLLER_ID,    /* OFPRAW_NXT_SET_CONTROLLER_ID. */
 561
 562     /* Flow monitor extension. */
 563     OFPTYPE_FLOW_MONITOR_STATS_REQUEST, /* OFPRAW_NXST_FLOW_MONITOR_REQUEST. */
 564     OFPTYPE_FLOW_MONITOR_STATS_REPLY,   /* OFPRAW_NXST_FLOW_MONITOR_REPLY. */
 565     OFPTYPE_FLOW_MONITOR_CANCEL,        /* OFPRAW_NXT_FLOW_MONITOR_CANCEL. */
 566     OFPTYPE_FLOW_MONITOR_PAUSED,        /* OFPRAW_NXT_FLOW_MONITOR_PAUSED. */
 567     OFPTYPE_FLOW_MONITOR_RESUMED,       /* OFPRAW_NXT_FLOW_MONITOR_RESUMED. */
 568 };
 569
 570 /* Decoding messages into OFPTYPE_* values. */
 571 enum ofperr ofptype_decode(enum ofptype *, const struct ofp_header *);
 572 enum ofperr ofptype_pull(enum ofptype *, struct ofpbuf *);
 573 enum ofptype ofptype_from_ofpraw(enum ofpraw);
 574 \f
 575 /* OpenFlow message properties. */
 576 void ofpmsg_update_length(struct ofpbuf *);
 577 const void *ofpmsg_body(const struct ofp_header *);
 578 \f
 579 /* Multipart messages (aka "statistics").
 580  *
 581  * Individual OpenFlow messages are limited to 64 kB in size, but some messages
 582  * need to be longer.  Therefore, multipart messages allow a longer message to
 583  * be divided into multiple parts at some convenient boundary.  For example,
 584  * limiting the response to a "flow dump" request to 64 kB would unreasonably
 585  * limit the maximum number of flows in an OpenFlow switch, so a "flow dump" is
 586  * expressed as a multipart request/reply pair, with the reply broken into
 587  * pieces between flows.
 588  *
 589  * Multipart messages always consist of a request/reply pair.
 590  *
 591  * In OpenFlow 1.0, 1.1, and 1.2, requests must always fit in a single message,
 592  * that is, only a multipart reply may have more than one part.  OpenFlow 1.3
 593  * adds one multipart request.  This code does not yet support multipart
 594  * requests. */
 595
 596 /* Encoding multipart replies.
 597  *
 598  * These functions are useful for multipart replies that might really require
 599  * more than one message.  A multipart message that is known in advance to fit
 600  * within 64 kB doesn't need any special treatment, so you might as well use
 601  * the ofpraw_alloc_*() functions.
 602  *
 603  * These functions work with a "struct list" of "struct ofpbuf"s, each of
 604  * which represents one part of a multipart message. */
 605 void ofpmp_init(struct list *, const struct ofp_header *request);
 606 struct ofpbuf *ofpmp_reserve(struct list *, size_t len);
 607 void *ofpmp_append(struct list *, size_t len);
 608 void ofpmp_postappend(struct list *, size_t start_ofs);
 609
 610 /* Decoding multipart replies. */
 611 uint16_t ofpmp_flags(const struct ofp_header *);
 612 bool ofpmp_more(const struct ofp_header *);
 613
 614 #endif /* ofp-msgs.h */