lib/ofp-util.h

   1 /*
   2  * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 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_UTIL_H
  18 #define OFP_UTIL_H 1
  19
  20 #include <stdbool.h>
  21 #include <stddef.h>
  22 #include <stdint.h>
  23 #include "classifier.h"
  24 #include "compiler.h"
  25 #include "flow.h"
  26 #include "match.h"
  27 #include "netdev.h"
  28 #include "openflow/nicira-ext.h"
  29 #include "openvswitch/types.h"
  30 #include "type-props.h"
  31
  32 struct ofpbuf;
  33
  34 /* Port numbers. */
  35 enum ofperr ofputil_port_from_ofp11(ovs_be32 ofp11_port,
  36                                     ofp_port_t *ofp10_port);
  37 ovs_be32 ofputil_port_to_ofp11(ofp_port_t ofp10_port);
  38
  39 enum ofperr ofputil_check_output_port(ofp_port_t ofp_port,
  40                                       ofp_port_t max_ports);
  41 bool ofputil_port_from_string(const char *, ofp_port_t *portp);
  42 void ofputil_format_port(ofp_port_t port, struct ds *);
  43 void ofputil_port_to_string(ofp_port_t, char namebuf[OFP_MAX_PORT_NAME_LEN],
  44                             size_t bufsize);
  45
  46 /* Converting OFPFW10_NW_SRC_MASK and OFPFW10_NW_DST_MASK wildcard bit counts
  47  * to and from IP bitmasks. */
  48 ovs_be32 ofputil_wcbits_to_netmask(int wcbits);
  49 int ofputil_netmask_to_wcbits(ovs_be32 netmask);
  50
  51 /* Protocols.
  52  *
  53  * A "protocol" is an OpenFlow version plus, for some OpenFlow versions,
  54  * a bit extra about the flow match format in use.
  55  *
  56  * These are arranged from most portable to least portable, or alternatively
  57  * from least powerful to most powerful.  Protocols earlier on the list are
  58  * more likely to be understood for the purpose of making requests, but
  59  * protocol later on the list are more likely to accurately describe a flow
  60  * within a switch.
  61  *
  62  * On any given OpenFlow connection, a single protocol is in effect at any
  63  * given time.  These values use separate bits only because that makes it easy
  64  * to test whether a particular protocol is within a given set of protocols and
  65  * to implement set union and intersection.
  66  */
  67 enum ofputil_protocol {
  68     /* OpenFlow 1.0 protocols.
  69      *
  70      * The "STD" protocols use the standard OpenFlow 1.0 flow format.
  71      * The "NXM" protocols use the Nicira Extensible Match (NXM) flow format.
  72      *
  73      * The protocols with "TID" mean that the nx_flow_mod_table_id Nicira
  74      * extension has been enabled.  The other protocols have it disabled.
  75      */
  76 #define OFPUTIL_P_NONE 0
  77     OFPUTIL_P_OF10_STD     = 1 << 0,
  78     OFPUTIL_P_OF10_STD_TID = 1 << 1,
  79     OFPUTIL_P_OF10_NXM     = 1 << 2,
  80     OFPUTIL_P_OF10_NXM_TID = 1 << 3,
  81 #define OFPUTIL_P_OF10_STD_ANY (OFPUTIL_P_OF10_STD | OFPUTIL_P_OF10_STD_TID)
  82 #define OFPUTIL_P_OF10_NXM_ANY (OFPUTIL_P_OF10_NXM | OFPUTIL_P_OF10_NXM_TID)
  83
  84     /* OpenFlow 1.1 protocol.
  85      *
  86      * We only support the standard OpenFlow 1.1 flow format.
  87      *
  88      * OpenFlow 1.1 always operates with an equivalent of the
  89      * nx_flow_mod_table_id Nicira extension enabled, so there is no "TID"
  90      * variant. */
  91     OFPUTIL_P_OF11_STD     = 1 << 4,
  92
  93     /* OpenFlow 1.2+ protocols (only one variant each).
  94      *
  95      * These use the standard OpenFlow Extensible Match (OXM) flow format.
  96      *
  97      * OpenFlow 1.2+ always operates with an equivalent of the
  98      * nx_flow_mod_table_id Nicira extension enabled, so there is no "TID"
  99      * variant. */
 100     OFPUTIL_P_OF12_OXM      = 1 << 5,
 101     OFPUTIL_P_OF13_OXM      = 1 << 6,
 102 #define OFPUTIL_P_ANY_OXM (OFPUTIL_P_OF12_OXM | OFPUTIL_P_OF13_OXM)
 103
 104     /* All protocols. */
 105 #define OFPUTIL_P_ANY ((1 << 7) - 1)
 106
 107     /* Protocols in which a specific table may be specified in flow_mods. */
 108 #define OFPUTIL_P_TID (OFPUTIL_P_OF10_STD_TID | \
 109                        OFPUTIL_P_OF10_NXM_TID | \
 110                        OFPUTIL_P_OF11_STD |     \
 111                        OFPUTIL_P_ANY_OXM)
 112 };
 113
 114 /* Protocols to use for flow dumps, from most to least preferred. */
 115 extern enum ofputil_protocol ofputil_flow_dump_protocols[];
 116 extern size_t ofputil_n_flow_dump_protocols;
 117
 118 enum ofputil_protocol ofputil_protocol_from_ofp_version(enum ofp_version);
 119 enum ofputil_protocol ofputil_protocols_from_ofp_version(enum ofp_version);
 120 enum ofp_version ofputil_protocol_to_ofp_version(enum ofputil_protocol);
 121
 122 bool ofputil_protocol_is_valid(enum ofputil_protocol);
 123 enum ofputil_protocol ofputil_protocol_set_tid(enum ofputil_protocol,
 124                                                bool enable);
 125 enum ofputil_protocol ofputil_protocol_to_base(enum ofputil_protocol);
 126 enum ofputil_protocol ofputil_protocol_set_base(
 127     enum ofputil_protocol cur, enum ofputil_protocol new_base);
 128
 129 const char *ofputil_protocol_to_string(enum ofputil_protocol);
 130 char *ofputil_protocols_to_string(enum ofputil_protocol);
 131 enum ofputil_protocol ofputil_protocols_from_string(const char *);
 132 enum ofputil_protocol ofputil_usable_protocols(const struct match *);
 133
 134 void ofputil_format_version(struct ds *, enum ofp_version);
 135 void ofputil_format_version_name(struct ds *, enum ofp_version);
 136
 137 /* A bitmap of version numbers
 138  *
 139  * Bit offsets correspond to ofp_version numbers which in turn correspond to
 140  * wire-protocol numbers for Open Flow versions..  E.g. (1u << OFP11_VERSION)
 141  * is the mask for Open Flow 1.1.  If the bit for a version is set then it is
 142  * allowed, otherwise it is disallowed. */
 143
 144 void ofputil_format_version_bitmap(struct ds *msg, uint32_t bitmap);
 145 void ofputil_format_version_bitmap_names(struct ds *msg, uint32_t bitmap);
 146
 147 uint32_t ofputil_protocols_to_version_bitmap(enum ofputil_protocol);
 148 enum ofputil_protocol ofputil_protocols_from_version_bitmap(uint32_t bitmap);
 149
 150 /* Bitmap of OpenFlow versions that Open vSwitch supports. */
 151 #define OFPUTIL_SUPPORTED_VERSIONS \
 152     ((1u << OFP10_VERSION) | (1u << OFP12_VERSION) | (1u << OFP13_VERSION))
 153
 154 /* Bitmap of OpenFlow versions to enable by default (a subset of
 155  * OFPUTIL_SUPPORTED_VERSIONS). */
 156 #define OFPUTIL_DEFAULT_VERSIONS (1u << OFP10_VERSION)
 157
 158 enum ofputil_protocol ofputil_protocols_from_string(const char *s);
 159
 160 const char *ofputil_version_to_string(enum ofp_version ofp_version);
 161 uint32_t ofputil_versions_from_string(const char *s);
 162 uint32_t ofputil_versions_from_strings(char ** const s, size_t count);
 163
 164 bool ofputil_decode_hello(const struct ofp_header *,
 165                           uint32_t *allowed_versions);
 166 struct ofpbuf *ofputil_encode_hello(uint32_t version_bitmap);
 167
 168 struct ofpbuf *ofputil_encode_set_protocol(enum ofputil_protocol current,
 169                                            enum ofputil_protocol want,
 170                                            enum ofputil_protocol *next);
 171
 172 /* nx_flow_format */
 173 struct ofpbuf *ofputil_encode_nx_set_flow_format(enum nx_flow_format);
 174 enum ofputil_protocol ofputil_nx_flow_format_to_protocol(enum nx_flow_format);
 175 bool ofputil_nx_flow_format_is_valid(enum nx_flow_format);
 176 const char *ofputil_nx_flow_format_to_string(enum nx_flow_format);
 177
 178 /* Work with ofp10_match. */
 179 void ofputil_wildcard_from_ofpfw10(uint32_t ofpfw, struct flow_wildcards *);
 180 void ofputil_match_from_ofp10_match(const struct ofp10_match *,
 181                                     struct match *);
 182 void ofputil_normalize_match(struct match *);
 183 void ofputil_normalize_match_quiet(struct match *);
 184 void ofputil_match_to_ofp10_match(const struct match *, struct ofp10_match *);
 185
 186 /* Work with ofp11_match. */
 187 enum ofperr ofputil_pull_ofp11_match(struct ofpbuf *, struct match *,
 188                                      uint16_t *padded_match_len);
 189 enum ofperr ofputil_match_from_ofp11_match(const struct ofp11_match *,
 190                                            struct match *);
 191 int ofputil_put_ofp11_match(struct ofpbuf *, const struct match *,
 192                             enum ofputil_protocol);
 193 void ofputil_match_to_ofp11_match(const struct match *, struct ofp11_match *);
 194 int ofputil_match_typical_len(enum ofputil_protocol);
 195
 196 /* dl_type translation between OpenFlow and 'struct flow' format. */
 197 ovs_be16 ofputil_dl_type_to_openflow(ovs_be16 flow_dl_type);
 198 ovs_be16 ofputil_dl_type_from_openflow(ovs_be16 ofp_dl_type);
 199
 200 /* PACKET_IN. */
 201 bool ofputil_packet_in_format_is_valid(enum nx_packet_in_format);
 202 int ofputil_packet_in_format_from_string(const char *);
 203 const char *ofputil_packet_in_format_to_string(enum nx_packet_in_format);
 204 struct ofpbuf *ofputil_make_set_packet_in_format(enum ofp_version,
 205                                                  enum nx_packet_in_format);
 206
 207 /* NXT_FLOW_MOD_TABLE_ID extension. */
 208 struct ofpbuf *ofputil_make_flow_mod_table_id(bool flow_mod_table_id);
 209
 210 /* Protocol-independent flow_mod.
 211  *
 212  * The handling of cookies across multiple versions of OpenFlow is a bit
 213  * confusing.  See DESIGN for the details. */
 214 struct ofputil_flow_mod {
 215     struct match match;
 216     unsigned int priority;
 217
 218     /* Cookie matching.  The flow_mod affects only flows that have cookies that
 219      * bitwise match 'cookie' bits in positions where 'cookie_mask has 1-bits.
 220      *
 221      * 'cookie_mask' should be zero for OFPFC_ADD flow_mods. */
 222     ovs_be64 cookie;         /* Cookie bits to match. */
 223     ovs_be64 cookie_mask;    /* 1-bit in each 'cookie' bit to match. */
 224
 225     /* Cookie changes.
 226      *
 227      * OFPFC_ADD uses 'new_cookie' as the new flow's cookie.  'new_cookie'
 228      * should not be UINT64_MAX.
 229      *
 230      * OFPFC_MODIFY and OFPFC_MODIFY_STRICT have two cases:
 231      *
 232      *   - If one or more matching flows exist and 'modify_cookie' is true,
 233      *     then the flow_mod changes the existing flows' cookies to
 234      *     'new_cookie'.  'new_cookie' should not be UINT64_MAX.
 235      *
 236      *   - If no matching flow exists, 'new_cookie' is not UINT64_MAX, and
 237      *     'cookie_mask' is 0, then the flow_mod adds a new flow with
 238      *     'new_cookie' as its cookie.
 239      */
 240     ovs_be64 new_cookie;     /* New cookie to install or UINT64_MAX. */
 241     bool modify_cookie;      /* Set cookie of existing flow to 'new_cookie'? */
 242
 243     uint8_t table_id;
 244     uint16_t command;
 245     uint16_t idle_timeout;
 246     uint16_t hard_timeout;
 247     uint32_t buffer_id;
 248     ofp_port_t out_port;
 249     uint16_t flags;
 250     struct ofpact *ofpacts;     /* Series of "struct ofpact"s. */
 251     size_t ofpacts_len;         /* Length of ofpacts, in bytes. */
 252 };
 253
 254 enum ofperr ofputil_decode_flow_mod(struct ofputil_flow_mod *,
 255                                     const struct ofp_header *,
 256                                     enum ofputil_protocol,
 257                                     struct ofpbuf *ofpacts);
 258 struct ofpbuf *ofputil_encode_flow_mod(const struct ofputil_flow_mod *,
 259                                        enum ofputil_protocol);
 260
 261 enum ofputil_protocol ofputil_flow_mod_usable_protocols(
 262     const struct ofputil_flow_mod *fms, size_t n_fms);
 263
 264 /* Flow stats or aggregate stats request, independent of protocol. */
 265 struct ofputil_flow_stats_request {
 266     bool aggregate;             /* Aggregate results? */
 267     struct match match;
 268     ovs_be64 cookie;
 269     ovs_be64 cookie_mask;
 270     ofp_port_t out_port;
 271     uint8_t table_id;
 272 };
 273
 274 enum ofperr ofputil_decode_flow_stats_request(
 275     struct ofputil_flow_stats_request *, const struct ofp_header *);
 276 struct ofpbuf *ofputil_encode_flow_stats_request(
 277     const struct ofputil_flow_stats_request *, enum ofputil_protocol);
 278 enum ofputil_protocol ofputil_flow_stats_request_usable_protocols(
 279     const struct ofputil_flow_stats_request *);
 280
 281 /* Flow stats reply, independent of protocol. */
 282 struct ofputil_flow_stats {
 283     struct match match;
 284     ovs_be64 cookie;
 285     uint8_t table_id;
 286     uint32_t duration_sec;
 287     uint32_t duration_nsec;
 288     uint16_t priority;
 289     uint16_t idle_timeout;
 290     uint16_t hard_timeout;
 291     int idle_age;               /* Seconds since last packet, -1 if unknown. */
 292     int hard_age;               /* Seconds since last change, -1 if unknown. */
 293     uint64_t packet_count;      /* Packet count, UINT64_MAX if unknown. */
 294     uint64_t byte_count;        /* Byte count, UINT64_MAX if unknown. */
 295     struct ofpact *ofpacts;
 296     size_t ofpacts_len;
 297     uint16_t flags;             /* Added for OF 1.3 */
 298 };
 299
 300 int ofputil_decode_flow_stats_reply(struct ofputil_flow_stats *,
 301                                     struct ofpbuf *msg,
 302                                     bool flow_age_extension,
 303                                     struct ofpbuf *ofpacts);
 304 void ofputil_append_flow_stats_reply(const struct ofputil_flow_stats *,
 305                                      struct list *replies);
 306
 307 /* Aggregate stats reply, independent of protocol. */
 308 struct ofputil_aggregate_stats {
 309     uint64_t packet_count;      /* Packet count, UINT64_MAX if unknown. */
 310     uint64_t byte_count;        /* Byte count, UINT64_MAX if unknown. */
 311     uint32_t flow_count;
 312 };
 313
 314 struct ofpbuf *ofputil_encode_aggregate_stats_reply(
 315     const struct ofputil_aggregate_stats *stats,
 316     const struct ofp_header *request);
 317 enum ofperr ofputil_decode_aggregate_stats_reply(
 318     struct ofputil_aggregate_stats *,
 319     const struct ofp_header *reply);
 320
 321 /* Flow removed message, independent of protocol. */
 322 struct ofputil_flow_removed {
 323     struct match match;
 324     uint16_t priority;
 325     ovs_be64 cookie;
 326     uint8_t reason;             /* One of OFPRR_*. */
 327     uint8_t table_id;           /* 255 if message didn't include table ID. */
 328     uint32_t duration_sec;
 329     uint32_t duration_nsec;
 330     uint16_t idle_timeout;
 331     uint16_t hard_timeout;
 332     uint64_t packet_count;      /* Packet count, UINT64_MAX if unknown. */
 333     uint64_t byte_count;        /* Byte count, UINT64_MAX if unknown. */
 334 };
 335
 336 enum ofperr ofputil_decode_flow_removed(struct ofputil_flow_removed *,
 337                                         const struct ofp_header *);
 338 struct ofpbuf *ofputil_encode_flow_removed(const struct ofputil_flow_removed *,
 339                                            enum ofputil_protocol);
 340
 341 /* Abstract packet-in message. */
 342 struct ofputil_packet_in {
 343     const void *packet;
 344     size_t packet_len;
 345
 346     enum ofp_packet_in_reason reason;    /* One of OFPR_*. */
 347     uint16_t controller_id;              /* Controller ID to send to. */
 348     uint8_t table_id;
 349     ovs_be64 cookie;
 350
 351     uint32_t buffer_id;
 352     int send_len;
 353     uint16_t total_len;         /* Full length of frame. */
 354
 355     struct flow_metadata fmd;   /* Metadata at creation time. */
 356 };
 357
 358 enum ofperr ofputil_decode_packet_in(struct ofputil_packet_in *,
 359                                      const struct ofp_header *);
 360 struct ofpbuf *ofputil_encode_packet_in(const struct ofputil_packet_in *,
 361                                         enum ofputil_protocol protocol,
 362                                         enum nx_packet_in_format);
 363
 364 enum { OFPUTIL_PACKET_IN_REASON_BUFSIZE = INT_STRLEN(int) + 1 };
 365 const char *ofputil_packet_in_reason_to_string(enum ofp_packet_in_reason,
 366                                                char *reasonbuf,
 367                                                size_t bufsize);
 368 bool ofputil_packet_in_reason_from_string(const char *,
 369                                           enum ofp_packet_in_reason *);
 370
 371 /* Abstract packet-out message.
 372  *
 373  * ofputil_decode_packet_out() will ensure that 'in_port' is a physical port
 374  * (OFPP_MAX or less) or one of OFPP_LOCAL, OFPP_NONE, or OFPP_CONTROLLER. */
 375 struct ofputil_packet_out {
 376     const void *packet;         /* Packet data, if buffer_id == UINT32_MAX. */
 377     size_t packet_len;          /* Length of packet data in bytes. */
 378     uint32_t buffer_id;         /* Buffer id or UINT32_MAX if no buffer. */
 379     ofp_port_t in_port;         /* Packet's input port. */
 380     struct ofpact *ofpacts;     /* Actions. */
 381     size_t ofpacts_len;         /* Size of ofpacts in bytes. */
 382 };
 383
 384 enum ofperr ofputil_decode_packet_out(struct ofputil_packet_out *,
 385                                       const struct ofp_header *,
 386                                       struct ofpbuf *ofpacts);
 387 struct ofpbuf *ofputil_encode_packet_out(const struct ofputil_packet_out *,
 388                                          enum ofputil_protocol protocol);
 389
 390 enum ofputil_port_config {
 391     /* OpenFlow 1.0 and 1.1 share these values for these port config bits. */
 392     OFPUTIL_PC_PORT_DOWN    = 1 << 0, /* Port is administratively down. */
 393     OFPUTIL_PC_NO_RECV      = 1 << 2, /* Drop all packets received by port. */
 394     OFPUTIL_PC_NO_FWD       = 1 << 5, /* Drop packets forwarded to port. */
 395     OFPUTIL_PC_NO_PACKET_IN = 1 << 6, /* No send packet-in msgs for port. */
 396     /* OpenFlow 1.0 only. */
 397     OFPUTIL_PC_NO_STP       = 1 << 1, /* No 802.1D spanning tree for port. */
 398     OFPUTIL_PC_NO_RECV_STP  = 1 << 3, /* Drop received 802.1D STP packets. */
 399     OFPUTIL_PC_NO_FLOOD     = 1 << 4, /* Do not include port when flooding. */
 400     /* There are no OpenFlow 1.1-only bits. */
 401 };
 402
 403 enum ofputil_port_state {
 404     /* OpenFlow 1.0 and 1.1 share this values for these port state bits. */
 405     OFPUTIL_PS_LINK_DOWN   = 1 << 0, /* No physical link present. */
 406     /* OpenFlow 1.1 only. */
 407     OFPUTIL_PS_BLOCKED     = 1 << 1, /* Port is blocked */
 408     OFPUTIL_PS_LIVE        = 1 << 2, /* Live for Fast Failover Group. */
 409     /* OpenFlow 1.0 only. */
 410     OFPUTIL_PS_STP_LISTEN  = 0 << 8, /* Not learning or relaying frames. */
 411     OFPUTIL_PS_STP_LEARN   = 1 << 8, /* Learning but not relaying frames. */
 412     OFPUTIL_PS_STP_FORWARD = 2 << 8, /* Learning and relaying frames. */
 413     OFPUTIL_PS_STP_BLOCK   = 3 << 8, /* Not part of spanning tree. */
 414     OFPUTIL_PS_STP_MASK    = 3 << 8  /* Bit mask for OFPPS10_STP_* values. */
 415 };
 416
 417 /* Abstract ofp10_phy_port or ofp11_port. */
 418 struct ofputil_phy_port {
 419     ofp_port_t port_no;
 420     uint8_t hw_addr[OFP_ETH_ALEN];
 421     char name[OFP_MAX_PORT_NAME_LEN];
 422     enum ofputil_port_config config;
 423     enum ofputil_port_state state;
 424
 425     /* NETDEV_F_* feature bitmasks. */
 426     enum netdev_features curr;       /* Current features. */
 427     enum netdev_features advertised; /* Features advertised by the port. */
 428     enum netdev_features supported;  /* Features supported by the port. */
 429     enum netdev_features peer;       /* Features advertised by peer. */
 430
 431     /* Speed. */
 432     uint32_t curr_speed;        /* Current speed, in kbps. */
 433     uint32_t max_speed;         /* Maximum supported speed, in kbps. */
 434 };
 435
 436 enum ofputil_capabilities {
 437     /* OpenFlow 1.0, 1.1, 1.2, and 1.3 share these capability values. */
 438     OFPUTIL_C_FLOW_STATS     = 1 << 0,  /* Flow statistics. */
 439     OFPUTIL_C_TABLE_STATS    = 1 << 1,  /* Table statistics. */
 440     OFPUTIL_C_PORT_STATS     = 1 << 2,  /* Port statistics. */
 441     OFPUTIL_C_IP_REASM       = 1 << 5,  /* Can reassemble IP fragments. */
 442     OFPUTIL_C_QUEUE_STATS    = 1 << 6,  /* Queue statistics. */
 443
 444     /* OpenFlow 1.0 and 1.1 share this capability. */
 445     OFPUTIL_C_ARP_MATCH_IP   = 1 << 7,  /* Match IP addresses in ARP pkts. */
 446
 447     /* OpenFlow 1.0 only. */
 448     OFPUTIL_C_STP            = 1 << 3,  /* 802.1d spanning tree. */
 449
 450     /* OpenFlow 1.1, 1.2, and 1.3 share this capability. */
 451     OFPUTIL_C_GROUP_STATS    = 1 << 4,  /* Group statistics. */
 452
 453     /* OpenFlow 1.2 and 1.3 share this capability */
 454     OFPUTIL_C_PORT_BLOCKED   = 1 << 8,  /* Switch will block looping ports */
 455 };
 456
 457 enum ofputil_action_bitmap {
 458     OFPUTIL_A_OUTPUT         = 1 << 0,
 459     OFPUTIL_A_SET_VLAN_VID   = 1 << 1,
 460     OFPUTIL_A_SET_VLAN_PCP   = 1 << 2,
 461     OFPUTIL_A_STRIP_VLAN     = 1 << 3,
 462     OFPUTIL_A_SET_DL_SRC     = 1 << 4,
 463     OFPUTIL_A_SET_DL_DST     = 1 << 5,
 464     OFPUTIL_A_SET_NW_SRC     = 1 << 6,
 465     OFPUTIL_A_SET_NW_DST     = 1 << 7,
 466     OFPUTIL_A_SET_NW_ECN     = 1 << 8,
 467     OFPUTIL_A_SET_NW_TOS     = 1 << 9,
 468     OFPUTIL_A_SET_TP_SRC     = 1 << 10,
 469     OFPUTIL_A_SET_TP_DST     = 1 << 11,
 470     OFPUTIL_A_ENQUEUE        = 1 << 12,
 471     OFPUTIL_A_COPY_TTL_OUT   = 1 << 13,
 472     OFPUTIL_A_COPY_TTL_IN    = 1 << 14,
 473     OFPUTIL_A_SET_MPLS_LABEL = 1 << 15,
 474     OFPUTIL_A_SET_MPLS_TC    = 1 << 16,
 475     OFPUTIL_A_SET_MPLS_TTL   = 1 << 17,
 476     OFPUTIL_A_DEC_MPLS_TTL   = 1 << 18,
 477     OFPUTIL_A_PUSH_VLAN      = 1 << 19,
 478     OFPUTIL_A_POP_VLAN       = 1 << 20,
 479     OFPUTIL_A_PUSH_MPLS      = 1 << 21,
 480     OFPUTIL_A_POP_MPLS       = 1 << 22,
 481     OFPUTIL_A_SET_QUEUE      = 1 << 23,
 482     OFPUTIL_A_GROUP          = 1 << 24,
 483     OFPUTIL_A_SET_NW_TTL     = 1 << 25,
 484     OFPUTIL_A_DEC_NW_TTL     = 1 << 26,
 485     OFPUTIL_A_SET_FIELD      = 1 << 27,
 486 };
 487
 488 /* Abstract ofp_switch_features. */
 489 struct ofputil_switch_features {
 490     uint64_t datapath_id;       /* Datapath unique ID. */
 491     uint32_t n_buffers;         /* Max packets buffered at once. */
 492     uint8_t n_tables;           /* Number of tables supported by datapath. */
 493     uint8_t auxiliary_id;       /* Identify auxiliary connections */
 494     enum ofputil_capabilities capabilities;
 495     enum ofputil_action_bitmap actions;
 496 };
 497
 498 enum ofperr ofputil_decode_switch_features(const struct ofp_header *,
 499                                            struct ofputil_switch_features *,
 500                                            struct ofpbuf *);
 501
 502 struct ofpbuf *ofputil_encode_switch_features(
 503     const struct ofputil_switch_features *, enum ofputil_protocol,
 504     ovs_be32 xid);
 505 void ofputil_put_switch_features_port(const struct ofputil_phy_port *,
 506                                       struct ofpbuf *);
 507 bool ofputil_switch_features_ports_trunc(struct ofpbuf *b);
 508
 509 /* phy_port helper functions. */
 510 int ofputil_pull_phy_port(enum ofp_version ofp_version, struct ofpbuf *,
 511                           struct ofputil_phy_port *);
 512 size_t ofputil_count_phy_ports(uint8_t ofp_version, struct ofpbuf *);
 513
 514 /* Abstract ofp_port_status. */
 515 struct ofputil_port_status {
 516     enum ofp_port_reason reason;
 517     struct ofputil_phy_port desc;
 518 };
 519
 520 enum ofperr ofputil_decode_port_status(const struct ofp_header *,
 521                                        struct ofputil_port_status *);
 522 struct ofpbuf *ofputil_encode_port_status(const struct ofputil_port_status *,
 523                                           enum ofputil_protocol);
 524
 525 /* Abstract ofp_port_mod. */
 526 struct ofputil_port_mod {
 527     ofp_port_t port_no;
 528     uint8_t hw_addr[OFP_ETH_ALEN];
 529     enum ofputil_port_config config;
 530     enum ofputil_port_config mask;
 531     enum netdev_features advertise;
 532 };
 533
 534 enum ofperr ofputil_decode_port_mod(const struct ofp_header *,
 535                                     struct ofputil_port_mod *);
 536 struct ofpbuf *ofputil_encode_port_mod(const struct ofputil_port_mod *,
 537                                        enum ofputil_protocol);
 538
 539 /* Meter band configuration for all supported band types. */
 540 struct ofputil_meter_band {
 541     uint16_t type;
 542     uint8_t prec_level;         /* Non-zero if type == OFPMBT_DSCP_REMARK. */
 543     uint32_t rate;
 544     uint32_t burst_size;
 545 };
 546
 547 struct ofputil_meter_band_stats {
 548     uint64_t packet_count;
 549     uint64_t byte_count;
 550 };
 551
 552 struct ofputil_meter_config {
 553     uint32_t meter_id;
 554     uint16_t flags;
 555     uint16_t n_bands;
 556     struct ofputil_meter_band *bands;
 557 };
 558
 559 /* Abstract ofp_meter_mod. */
 560 struct ofputil_meter_mod {
 561     uint16_t command;
 562     struct ofputil_meter_config meter;
 563 };
 564
 565 struct ofputil_meter_stats {
 566     uint32_t meter_id;
 567     uint32_t flow_count;
 568     uint64_t packet_in_count;
 569     uint64_t byte_in_count;
 570     uint32_t duration_sec;
 571     uint32_t duration_nsec;
 572     uint16_t n_bands;
 573     struct ofputil_meter_band_stats *bands;
 574 };
 575
 576 struct ofputil_meter_features {
 577     uint32_t max_meters;        /* Maximum number of meters. */
 578     uint32_t band_types;        /* Can support max 32 band types. */
 579     uint32_t capabilities;      /* Supported flags. */
 580     uint8_t  max_bands;
 581     uint8_t  max_color;
 582 };
 583
 584 enum ofperr ofputil_decode_meter_mod(const struct ofp_header *,
 585                                      struct ofputil_meter_mod *,
 586                                      struct ofpbuf *bands);
 587 struct ofpbuf *ofputil_encode_meter_mod(enum ofp_version,
 588                                         const struct ofputil_meter_mod *);
 589
 590 void ofputil_decode_meter_features(const struct ofp_header *,
 591                                    struct ofputil_meter_features *);
 592 struct ofpbuf *ofputil_encode_meter_features_reply(const struct
 593                                                    ofputil_meter_features *,
 594                                                    const struct ofp_header *
 595                                                    request);
 596 void ofputil_decode_meter_request(const struct ofp_header *,
 597                                   uint32_t *meter_id);
 598
 599 void ofputil_append_meter_config(struct list *replies,
 600                                  const struct ofputil_meter_config *);
 601
 602 void ofputil_append_meter_stats(struct list *replies,
 603                                 const struct ofputil_meter_stats *);
 604
 605 enum ofputil_meter_request_type {
 606     OFPUTIL_METER_FEATURES,
 607     OFPUTIL_METER_CONFIG,
 608     OFPUTIL_METER_STATS
 609 };
 610
 611 struct ofpbuf *ofputil_encode_meter_request(enum ofp_version,
 612                                             enum ofputil_meter_request_type,
 613                                             uint32_t meter_id);
 614
 615 int ofputil_decode_meter_stats(struct ofpbuf *,
 616                                struct ofputil_meter_stats *,
 617                                struct ofpbuf *bands);
 618
 619 int ofputil_decode_meter_config(struct ofpbuf *,
 620                                 struct ofputil_meter_config *,
 621                                 struct ofpbuf *bands);
 622
 623 /* Type for meter_id in ofproto provider interface, UINT32_MAX if invalid. */
 624 typedef struct { uint32_t uint32; } ofproto_meter_id;
 625
 626 /* Abstract ofp_role_request and reply. */
 627 struct ofputil_role_request {
 628     enum ofp12_controller_role role;
 629     bool have_generation_id;
 630     uint64_t generation_id;
 631 };
 632
 633 enum ofperr ofputil_decode_role_message(const struct ofp_header *,
 634                                         struct ofputil_role_request *);
 635 struct ofpbuf *ofputil_encode_role_reply(const struct ofp_header *,
 636                                          const struct ofputil_role_request *);
 637
 638 /* Abstract table stats.
 639  *
 640  * For now we use ofp12_table_stats as a superset of the other protocol
 641  * versions' table stats. */
 642
 643 struct ofpbuf *ofputil_encode_table_stats_reply(
 644     const struct ofp12_table_stats[], int n,
 645     const struct ofp_header *request);
 646
 647 /* Abstract nx_flow_monitor_request. */
 648 struct ofputil_flow_monitor_request {
 649     uint32_t id;
 650     enum nx_flow_monitor_flags flags;
 651     ofp_port_t out_port;
 652     uint8_t table_id;
 653     struct match match;
 654 };
 655
 656 int ofputil_decode_flow_monitor_request(struct ofputil_flow_monitor_request *,
 657                                         struct ofpbuf *msg);
 658 void ofputil_append_flow_monitor_request(
 659     const struct ofputil_flow_monitor_request *, struct ofpbuf *msg);
 660
 661 /* Abstract nx_flow_update. */
 662 struct ofputil_flow_update {
 663     enum nx_flow_update_event event;
 664
 665     /* Used only for NXFME_ADDED, NXFME_DELETED, NXFME_MODIFIED. */
 666     enum ofp_flow_removed_reason reason;
 667     uint16_t idle_timeout;
 668     uint16_t hard_timeout;
 669     uint8_t table_id;
 670     ovs_be64 cookie;
 671     struct match *match;
 672     uint16_t priority;
 673     struct ofpact *ofpacts;
 674     size_t ofpacts_len;
 675
 676     /* Used only for NXFME_ABBREV. */
 677     ovs_be32 xid;
 678 };
 679
 680 int ofputil_decode_flow_update(struct ofputil_flow_update *,
 681                                struct ofpbuf *msg, struct ofpbuf *ofpacts);
 682 void ofputil_start_flow_update(struct list *replies);
 683 void ofputil_append_flow_update(const struct ofputil_flow_update *,
 684                                 struct list *replies);
 685
 686 /* Abstract nx_flow_monitor_cancel. */
 687 uint32_t ofputil_decode_flow_monitor_cancel(const struct ofp_header *);
 688 struct ofpbuf *ofputil_encode_flow_monitor_cancel(uint32_t id);
 689
 690 /* Encoding OpenFlow stats messages. */
 691 void ofputil_append_port_desc_stats_reply(enum ofp_version ofp_version,
 692                                           const struct ofputil_phy_port *pp,
 693                                           struct list *replies);
 694
 695 /* Encoding simple OpenFlow messages. */
 696 struct ofpbuf *make_echo_request(enum ofp_version);
 697 struct ofpbuf *make_echo_reply(const struct ofp_header *rq);
 698
 699 struct ofpbuf *ofputil_encode_barrier_request(enum ofp_version);
 700
 701 const char *ofputil_frag_handling_to_string(enum ofp_config_flags);
 702 bool ofputil_frag_handling_from_string(const char *, enum ofp_config_flags *);
 703
 704 \f
 705 /* Actions. */
 706
 707 /* The type of an action.
 708  *
 709  * For each implemented OFPAT10_* and NXAST_* action type, there is a
 710  * corresponding constant prefixed with OFPUTIL_, e.g.:
 711  *
 712  * OFPUTIL_OFPAT10_OUTPUT
 713  * OFPUTIL_OFPAT10_SET_VLAN_VID
 714  * OFPUTIL_OFPAT10_SET_VLAN_PCP
 715  * OFPUTIL_OFPAT10_STRIP_VLAN
 716  * OFPUTIL_OFPAT10_SET_DL_SRC
 717  * OFPUTIL_OFPAT10_SET_DL_DST
 718  * OFPUTIL_OFPAT10_SET_NW_SRC
 719  * OFPUTIL_OFPAT10_SET_NW_DST
 720  * OFPUTIL_OFPAT10_SET_NW_TOS
 721  * OFPUTIL_OFPAT10_SET_TP_SRC
 722  * OFPUTIL_OFPAT10_SET_TP_DST
 723  * OFPUTIL_OFPAT10_ENQUEUE
 724  * OFPUTIL_NXAST_RESUBMIT
 725  * OFPUTIL_NXAST_SET_TUNNEL
 726  * OFPUTIL_NXAST_SET_METADATA
 727  * OFPUTIL_NXAST_SET_QUEUE
 728  * OFPUTIL_NXAST_POP_QUEUE
 729  * OFPUTIL_NXAST_REG_MOVE
 730  * OFPUTIL_NXAST_REG_LOAD
 731  * OFPUTIL_NXAST_NOTE
 732  * OFPUTIL_NXAST_SET_TUNNEL64
 733  * OFPUTIL_NXAST_MULTIPATH
 734  * OFPUTIL_NXAST_BUNDLE
 735  * OFPUTIL_NXAST_BUNDLE_LOAD
 736  * OFPUTIL_NXAST_RESUBMIT_TABLE
 737  * OFPUTIL_NXAST_OUTPUT_REG
 738  * OFPUTIL_NXAST_LEARN
 739  * OFPUTIL_NXAST_DEC_TTL
 740  * OFPUTIL_NXAST_FIN_TIMEOUT
 741  *
 742  * (The above list helps developers who want to "grep" for these definitions.)
 743  */
 744 enum OVS_PACKED_ENUM ofputil_action_code {
 745     OFPUTIL_ACTION_INVALID,
 746 #define OFPAT10_ACTION(ENUM, STRUCT, NAME)             OFPUTIL_##ENUM,
 747 #define OFPAT11_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) OFPUTIL_##ENUM,
 748 #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME)   OFPUTIL_##ENUM,
 749 #include "ofp-util.def"
 750 };
 751
 752 /* The number of values of "enum ofputil_action_code". */
 753 enum {
 754 #define OFPAT10_ACTION(ENUM, STRUCT, NAME)             + 1
 755 #define OFPAT11_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) + 1
 756 #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME)   + 1
 757     OFPUTIL_N_ACTIONS = 1
 758 #include "ofp-util.def"
 759 };
 760
 761 int ofputil_action_code_from_name(const char *);
 762
 763 void *ofputil_put_action(enum ofputil_action_code, struct ofpbuf *buf);
 764
 765 /* For each OpenFlow action <ENUM> that has a corresponding action structure
 766  * struct <STRUCT>, this defines two functions:
 767  *
 768  *   void ofputil_init_<ENUM>(struct <STRUCT> *action);
 769  *
 770  *     Initializes the parts of 'action' that identify it as having type <ENUM>
 771  *     and length 'sizeof *action' and zeros the rest.  For actions that have
 772  *     variable length, the length used and cleared is that of struct <STRUCT>.
 773  *
 774  *  struct <STRUCT> *ofputil_put_<ENUM>(struct ofpbuf *buf);
 775  *
 776  *     Appends a new 'action', of length 'sizeof(struct <STRUCT>)', to 'buf',
 777  *     initializes it with ofputil_init_<ENUM>(), and returns it.
 778  */
 779 #define OFPAT10_ACTION(ENUM, STRUCT, NAME)              \
 780     void ofputil_init_##ENUM(struct STRUCT *);          \
 781     struct STRUCT *ofputil_put_##ENUM(struct ofpbuf *);
 782 #define OFPAT11_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME)  \
 783     void ofputil_init_##ENUM(struct STRUCT *);          \
 784     struct STRUCT *ofputil_put_##ENUM(struct ofpbuf *);
 785 #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME)    \
 786     void ofputil_init_##ENUM(struct STRUCT *);          \
 787     struct STRUCT *ofputil_put_##ENUM(struct ofpbuf *);
 788 #include "ofp-util.def"
 789
 790 #define OFP_ACTION_ALIGN 8      /* Alignment of ofp_actions. */
 791
 792 bool action_outputs_to_port(const union ofp_action *, ovs_be16 port);
 793
 794 enum ofperr ofputil_pull_actions(struct ofpbuf *, unsigned int actions_len,
 795                                  union ofp_action **, size_t *);
 796
 797 bool ofputil_actions_equal(const union ofp_action *a, size_t n_a,
 798                            const union ofp_action *b, size_t n_b);
 799 union ofp_action *ofputil_actions_clone(const union ofp_action *, size_t n);
 800
 801 /* Handy utility for parsing flows and actions. */
 802 bool ofputil_parse_key_value(char **stringp, char **keyp, char **valuep);
 803
 804 struct ofputil_port_stats {
 805     ofp_port_t port_no;
 806     struct netdev_stats stats;
 807     uint32_t duration_sec;      /* UINT32_MAX if unknown. */
 808     uint32_t duration_nsec;
 809 };
 810
 811 struct ofpbuf *ofputil_encode_dump_ports_request(enum ofp_version ofp_version,
 812                                                  ofp_port_t port);
 813 void ofputil_append_port_stat(struct list *replies,
 814                               const struct ofputil_port_stats *ops);
 815 size_t ofputil_count_port_stats(const struct ofp_header *);
 816 int ofputil_decode_port_stats(struct ofputil_port_stats *, struct ofpbuf *msg);
 817 enum ofperr ofputil_decode_port_stats_request(const struct ofp_header *request,
 818                                               ofp_port_t *ofp10_port);
 819
 820 struct ofputil_queue_stats_request {
 821     ofp_port_t port_no;           /* OFPP_ANY means "all ports". */
 822     uint32_t queue_id;
 823 };
 824
 825 enum ofperr
 826 ofputil_decode_queue_stats_request(const struct ofp_header *request,
 827                                    struct ofputil_queue_stats_request *oqsr);
 828 struct ofpbuf *
 829 ofputil_encode_queue_stats_request(enum ofp_version ofp_version,
 830                                    const struct ofputil_queue_stats_request *oqsr);
 831
 832 struct ofputil_queue_stats {
 833     ofp_port_t port_no;
 834     uint32_t queue_id;
 835     struct netdev_queue_stats stats;
 836 };
 837
 838 size_t ofputil_count_queue_stats(const struct ofp_header *);
 839 int ofputil_decode_queue_stats(struct ofputil_queue_stats *qs, struct ofpbuf *msg);
 840 void ofputil_append_queue_stat(struct list *replies,
 841                                const struct ofputil_queue_stats *oqs);
 842
 843 #endif /* ofp-util.h */