include/openflow/openflow.h

   1 /*
   2  * Copyright (c) 2008, 2009, 2010 Nicira Networks.
   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 /* OpenFlow: protocol between controller and datapath. */
  18
  19 #ifndef OPENFLOW_OPENFLOW_H
  20 #define OPENFLOW_OPENFLOW_H 1
  21
  22 #ifdef __KERNEL__
  23 #include <linux/types.h>
  24 #else
  25 #include <stdint.h>
  26 #endif
  27
  28 #ifdef SWIG
  29 #define OFP_ASSERT(EXPR)        /* SWIG can't handle OFP_ASSERT. */
  30 #elif !defined(__cplusplus)
  31 /* Build-time assertion for use in a declaration context. */
  32 #define OFP_ASSERT(EXPR)                                                \
  33         extern int (*build_assert(void))[ sizeof(struct {               \
  34                     unsigned int build_assert_failed : (EXPR) ? 1 : -1; })]
  35 #else /* __cplusplus */
  36 #include <boost/static_assert.hpp>
  37 #define OFP_ASSERT BOOST_STATIC_ASSERT
  38 #endif /* __cplusplus */
  39
  40 /* Version number:
  41  * Non-experimental versions released: 0x01
  42  * Experimental versions released: 0x81 -- 0x99
  43  */
  44 /* The most significant bit being set in the version field indicates an
  45  * experimental OpenFlow version.
  46  */
  47 #define OFP_VERSION   0x01
  48
  49 #define OFP_MAX_TABLE_NAME_LEN 32
  50 #define OFP_MAX_PORT_NAME_LEN  16
  51
  52 #define OFP_TCP_PORT  6633
  53 #define OFP_SSL_PORT  6633
  54
  55 #define OFP_ETH_ALEN 6          /* Bytes in an Ethernet address. */
  56
  57 /* Port numbering.  Physical ports are numbered starting from 1. */
  58 enum ofp_port {
  59     /* Maximum number of physical switch ports. */
  60     OFPP_MAX = 0xff00,
  61
  62     /* Fake output "ports". */
  63     OFPP_IN_PORT    = 0xfff8,  /* Send the packet out the input port.  This
  64                                   virtual port must be explicitly used
  65                                   in order to send back out of the input
  66                                   port. */
  67     OFPP_TABLE      = 0xfff9,  /* Perform actions in flow table.
  68                                   NB: This can only be the destination
  69                                   port for packet-out messages. */
  70     OFPP_NORMAL     = 0xfffa,  /* Process with normal L2/L3 switching. */
  71     OFPP_FLOOD      = 0xfffb,  /* All physical ports except input port and
  72                                   those disabled by STP. */
  73     OFPP_ALL        = 0xfffc,  /* All physical ports except input port. */
  74     OFPP_CONTROLLER = 0xfffd,  /* Send to controller. */
  75     OFPP_LOCAL      = 0xfffe,  /* Local openflow "port". */
  76     OFPP_NONE       = 0xffff   /* Not associated with a physical port. */
  77 };
  78
  79 enum ofp_type {
  80     /* Immutable messages. */
  81     OFPT_HELLO,               /* Symmetric message */
  82     OFPT_ERROR,               /* Symmetric message */
  83     OFPT_ECHO_REQUEST,        /* Symmetric message */
  84     OFPT_ECHO_REPLY,          /* Symmetric message */
  85     OFPT_VENDOR,              /* Symmetric message */
  86
  87     /* Switch configuration messages. */
  88     OFPT_FEATURES_REQUEST,    /* Controller/switch message */
  89     OFPT_FEATURES_REPLY,      /* Controller/switch message */
  90     OFPT_GET_CONFIG_REQUEST,  /* Controller/switch message */
  91     OFPT_GET_CONFIG_REPLY,    /* Controller/switch message */
  92     OFPT_SET_CONFIG,          /* Controller/switch message */
  93
  94     /* Asynchronous messages. */
  95     OFPT_PACKET_IN,           /* Async message */
  96     OFPT_FLOW_REMOVED,        /* Async message */
  97     OFPT_PORT_STATUS,         /* Async message */
  98
  99     /* Controller command messages. */
 100     OFPT_PACKET_OUT,          /* Controller/switch message */
 101     OFPT_FLOW_MOD,            /* Controller/switch message */
 102     OFPT_PORT_MOD,            /* Controller/switch message */
 103
 104     /* Statistics messages. */
 105     OFPT_STATS_REQUEST,       /* Controller/switch message */
 106     OFPT_STATS_REPLY,         /* Controller/switch message */
 107
 108     /* Barrier messages. */
 109     OFPT_BARRIER_REQUEST,     /* Controller/switch message */
 110     OFPT_BARRIER_REPLY,       /* Controller/switch message */
 111
 112     /* Queue Configuration messages. */
 113     OFPT_QUEUE_GET_CONFIG_REQUEST,  /* Controller/switch message */
 114     OFPT_QUEUE_GET_CONFIG_REPLY     /* Controller/switch message */
 115 };
 116
 117 /* Header on all OpenFlow packets. */
 118 struct ofp_header {
 119     uint8_t version;    /* OFP_VERSION. */
 120     uint8_t type;       /* One of the OFPT_ constants. */
 121     uint16_t length;    /* Length including this ofp_header. */
 122     uint32_t xid;       /* Transaction id associated with this packet.
 123                            Replies use the same id as was in the request
 124                            to facilitate pairing. */
 125 };
 126 OFP_ASSERT(sizeof(struct ofp_header) == 8);
 127
 128 /* OFPT_HELLO.  This message has an empty body, but implementations must
 129  * ignore any data included in the body, to allow for future extensions. */
 130 struct ofp_hello {
 131     struct ofp_header header;
 132 };
 133
 134 #define OFP_DEFAULT_MISS_SEND_LEN   128
 135
 136 enum ofp_config_flags {
 137     /* Handling of IP fragments. */
 138     OFPC_FRAG_NORMAL   = 0,  /* No special handling for fragments. */
 139     OFPC_FRAG_DROP     = 1,  /* Drop fragments. */
 140     OFPC_FRAG_REASM    = 2,  /* Reassemble (only if OFPC_IP_REASM set). */
 141     OFPC_FRAG_MASK     = 3
 142 };
 143
 144 /* Switch configuration. */
 145 struct ofp_switch_config {
 146     struct ofp_header header;
 147     uint16_t flags;             /* OFPC_* flags. */
 148     uint16_t miss_send_len;     /* Max bytes of new flow that datapath should
 149                                    send to the controller. */
 150 };
 151 OFP_ASSERT(sizeof(struct ofp_switch_config) == 12);
 152
 153 /* Capabilities supported by the datapath. */
 154 enum ofp_capabilities {
 155     OFPC_FLOW_STATS     = 1 << 0,  /* Flow statistics. */
 156     OFPC_TABLE_STATS    = 1 << 1,  /* Table statistics. */
 157     OFPC_PORT_STATS     = 1 << 2,  /* Port statistics. */
 158     OFPC_STP            = 1 << 3,  /* 802.1d spanning tree. */
 159     OFPC_RESERVED       = 1 << 4,  /* Reserved, must not be set. */
 160     OFPC_IP_REASM       = 1 << 5,  /* Can reassemble IP fragments. */
 161     OFPC_QUEUE_STATS    = 1 << 6,  /* Queue statistics. */
 162     OFPC_ARP_MATCH_IP   = 1 << 7   /* Match IP addresses in ARP
 163                                       pkts. */
 164 };
 165
 166 /* Flags to indicate behavior of the physical port.  These flags are
 167  * used in ofp_phy_port to describe the current configuration.  They are
 168  * used in the ofp_port_mod message to configure the port's behavior.
 169  */
 170 enum ofp_port_config {
 171     OFPPC_PORT_DOWN    = 1 << 0,  /* Port is administratively down. */
 172
 173     OFPPC_NO_STP       = 1 << 1,  /* Disable 802.1D spanning tree on port. */
 174     OFPPC_NO_RECV      = 1 << 2,  /* Drop all packets except 802.1D
 175                                      spanning tree packets. */
 176     OFPPC_NO_RECV_STP  = 1 << 3,  /* Drop received 802.1D STP packets. */
 177     OFPPC_NO_FLOOD     = 1 << 4,  /* Do not include this port when flooding. */
 178     OFPPC_NO_FWD       = 1 << 5,  /* Drop packets forwarded to port. */
 179     OFPPC_NO_PACKET_IN = 1 << 6   /* Do not send packet-in msgs for port. */
 180 };
 181
 182 /* Current state of the physical port.  These are not configurable from
 183  * the controller.
 184  */
 185 enum ofp_port_state {
 186     OFPPS_LINK_DOWN   = 1 << 0, /* No physical link present. */
 187
 188     /* The OFPPS_STP_* bits have no effect on switch operation.  The
 189      * controller must adjust OFPPC_NO_RECV, OFPPC_NO_FWD, and
 190      * OFPPC_NO_PACKET_IN appropriately to fully implement an 802.1D spanning
 191      * tree. */
 192     OFPPS_STP_LISTEN  = 0 << 8, /* Not learning or relaying frames. */
 193     OFPPS_STP_LEARN   = 1 << 8, /* Learning but not relaying frames. */
 194     OFPPS_STP_FORWARD = 2 << 8, /* Learning and relaying frames. */
 195     OFPPS_STP_BLOCK   = 3 << 8, /* Not part of spanning tree. */
 196     OFPPS_STP_MASK    = 3 << 8  /* Bit mask for OFPPS_STP_* values. */
 197 };
 198
 199 /* Features of physical ports available in a datapath. */
 200 enum ofp_port_features {
 201     OFPPF_10MB_HD    = 1 << 0,  /* 10 Mb half-duplex rate support. */
 202     OFPPF_10MB_FD    = 1 << 1,  /* 10 Mb full-duplex rate support. */
 203     OFPPF_100MB_HD   = 1 << 2,  /* 100 Mb half-duplex rate support. */
 204     OFPPF_100MB_FD   = 1 << 3,  /* 100 Mb full-duplex rate support. */
 205     OFPPF_1GB_HD     = 1 << 4,  /* 1 Gb half-duplex rate support. */
 206     OFPPF_1GB_FD     = 1 << 5,  /* 1 Gb full-duplex rate support. */
 207     OFPPF_10GB_FD    = 1 << 6,  /* 10 Gb full-duplex rate support. */
 208     OFPPF_COPPER     = 1 << 7,  /* Copper medium. */
 209     OFPPF_FIBER      = 1 << 8,  /* Fiber medium. */
 210     OFPPF_AUTONEG    = 1 << 9,  /* Auto-negotiation. */
 211     OFPPF_PAUSE      = 1 << 10, /* Pause. */
 212     OFPPF_PAUSE_ASYM = 1 << 11  /* Asymmetric pause. */
 213 };
 214
 215 /* Description of a physical port */
 216 struct ofp_phy_port {
 217     uint16_t port_no;
 218     uint8_t hw_addr[OFP_ETH_ALEN];
 219     uint8_t name[OFP_MAX_PORT_NAME_LEN]; /* Null-terminated */
 220
 221     uint32_t config;        /* Bitmap of OFPPC_* flags. */
 222     uint32_t state;         /* Bitmap of OFPPS_* flags. */
 223
 224     /* Bitmaps of OFPPF_* that describe features.  All bits zeroed if
 225      * unsupported or unavailable. */
 226     uint32_t curr;          /* Current features. */
 227     uint32_t advertised;    /* Features being advertised by the port. */
 228     uint32_t supported;     /* Features supported by the port. */
 229     uint32_t peer;          /* Features advertised by peer. */
 230 };
 231 OFP_ASSERT(sizeof(struct ofp_phy_port) == 48);
 232
 233 /* Switch features. */
 234 struct ofp_switch_features {
 235     struct ofp_header header;
 236     uint64_t datapath_id;   /* Datapath unique ID.  The lower 48-bits are for
 237                                a MAC address, while the upper 16-bits are
 238                                implementer-defined. */
 239
 240     uint32_t n_buffers;     /* Max packets buffered at once. */
 241
 242     uint8_t n_tables;       /* Number of tables supported by datapath. */
 243     uint8_t pad[3];         /* Align to 64-bits. */
 244
 245     /* Features. */
 246     uint32_t capabilities;  /* Bitmap of support "ofp_capabilities". */
 247     uint32_t actions;       /* Bitmap of supported "ofp_action_type"s. */
 248
 249     /* Port info.*/
 250     struct ofp_phy_port ports[0];  /* Port definitions.  The number of ports
 251                                       is inferred from the length field in
 252                                       the header. */
 253 };
 254 OFP_ASSERT(sizeof(struct ofp_switch_features) == 32);
 255
 256 /* What changed about the physical port */
 257 enum ofp_port_reason {
 258     OFPPR_ADD,              /* The port was added. */
 259     OFPPR_DELETE,           /* The port was removed. */
 260     OFPPR_MODIFY            /* Some attribute of the port has changed. */
 261 };
 262
 263 /* A physical port has changed in the datapath */
 264 struct ofp_port_status {
 265     struct ofp_header header;
 266     uint8_t reason;          /* One of OFPPR_*. */
 267     uint8_t pad[7];          /* Align to 64-bits. */
 268     struct ofp_phy_port desc;
 269 };
 270 OFP_ASSERT(sizeof(struct ofp_port_status) == 64);
 271
 272 /* Modify behavior of the physical port */
 273 struct ofp_port_mod {
 274     struct ofp_header header;
 275     uint16_t port_no;
 276     uint8_t hw_addr[OFP_ETH_ALEN]; /* The hardware address is not
 277                                       configurable.  This is used to
 278                                       sanity-check the request, so it must
 279                                       be the same as returned in an
 280                                       ofp_phy_port struct. */
 281
 282     uint32_t config;        /* Bitmap of OFPPC_* flags. */
 283     uint32_t mask;          /* Bitmap of OFPPC_* flags to be changed. */
 284
 285     uint32_t advertise;     /* Bitmap of "ofp_port_features"s.  Zero all
 286                                bits to prevent any action taking place. */
 287     uint8_t pad[4];         /* Pad to 64-bits. */
 288 };
 289 OFP_ASSERT(sizeof(struct ofp_port_mod) == 32);
 290
 291 /* Why is this packet being sent to the controller? */
 292 enum ofp_packet_in_reason {
 293     OFPR_NO_MATCH,          /* No matching flow. */
 294     OFPR_ACTION             /* Action explicitly output to controller. */
 295 };
 296
 297 /* Packet received on port (datapath -> controller). */
 298 struct ofp_packet_in {
 299     struct ofp_header header;
 300     uint32_t buffer_id;     /* ID assigned by datapath. */
 301     uint16_t total_len;     /* Full length of frame. */
 302     uint16_t in_port;       /* Port on which frame was received. */
 303     uint8_t reason;         /* Reason packet is being sent (one of OFPR_*) */
 304     uint8_t pad;
 305     uint8_t data[0];        /* Ethernet frame, halfway through 32-bit word,
 306                                so the IP header is 32-bit aligned.  The
 307                                amount of data is inferred from the length
 308                                field in the header.  Because of padding,
 309                                offsetof(struct ofp_packet_in, data) ==
 310                                sizeof(struct ofp_packet_in) - 2. */
 311 };
 312 OFP_ASSERT(sizeof(struct ofp_packet_in) == 20);
 313
 314 enum ofp_action_type {
 315     OFPAT_OUTPUT,           /* Output to switch port. */
 316     OFPAT_SET_VLAN_VID,     /* Set the 802.1q VLAN id. */
 317     OFPAT_SET_VLAN_PCP,     /* Set the 802.1q priority. */
 318     OFPAT_STRIP_VLAN,       /* Strip the 802.1q header. */
 319     OFPAT_SET_DL_SRC,       /* Ethernet source address. */
 320     OFPAT_SET_DL_DST,       /* Ethernet destination address. */
 321     OFPAT_SET_NW_SRC,       /* IP source address. */
 322     OFPAT_SET_NW_DST,       /* IP destination address. */
 323     OFPAT_SET_NW_TOS,       /* IP ToS (DSCP field, 6 bits). */
 324     OFPAT_SET_TP_SRC,       /* TCP/UDP source port. */
 325     OFPAT_SET_TP_DST,       /* TCP/UDP destination port. */
 326     OFPAT_ENQUEUE,          /* Output to queue. */
 327     OFPAT_VENDOR = 0xffff
 328 };
 329
 330 /* Action structure for OFPAT_OUTPUT, which sends packets out 'port'.
 331  * When the 'port' is the OFPP_CONTROLLER, 'max_len' indicates the max
 332  * number of bytes to send.  A 'max_len' of zero means no bytes of the
 333  * packet should be sent. */
 334 struct ofp_action_output {
 335     uint16_t type;                  /* OFPAT_OUTPUT. */
 336     uint16_t len;                   /* Length is 8. */
 337     uint16_t port;                  /* Output port. */
 338     uint16_t max_len;               /* Max length to send to controller. */
 339 };
 340 OFP_ASSERT(sizeof(struct ofp_action_output) == 8);
 341
 342 /* The VLAN id is 12 bits, so we can use the entire 16 bits to indicate
 343  * special conditions.  All ones is used to match that no VLAN id was
 344  * set. */
 345 #define OFP_VLAN_NONE      0xffff
 346
 347 /* Action structure for OFPAT_SET_VLAN_VID. */
 348 struct ofp_action_vlan_vid {
 349     uint16_t type;                  /* OFPAT_SET_VLAN_VID. */
 350     uint16_t len;                   /* Length is 8. */
 351     uint16_t vlan_vid;              /* VLAN id. */
 352     uint8_t pad[2];
 353 };
 354 OFP_ASSERT(sizeof(struct ofp_action_vlan_vid) == 8);
 355
 356 /* Action structure for OFPAT_SET_VLAN_PCP. */
 357 struct ofp_action_vlan_pcp {
 358     uint16_t type;                  /* OFPAT_SET_VLAN_PCP. */
 359     uint16_t len;                   /* Length is 8. */
 360     uint8_t vlan_pcp;               /* VLAN priority. */
 361     uint8_t pad[3];
 362 };
 363 OFP_ASSERT(sizeof(struct ofp_action_vlan_pcp) == 8);
 364
 365 /* Action structure for OFPAT_SET_DL_SRC/DST. */
 366 struct ofp_action_dl_addr {
 367     uint16_t type;                  /* OFPAT_SET_DL_SRC/DST. */
 368     uint16_t len;                   /* Length is 16. */
 369     uint8_t dl_addr[OFP_ETH_ALEN];  /* Ethernet address. */
 370     uint8_t pad[6];
 371 };
 372 OFP_ASSERT(sizeof(struct ofp_action_dl_addr) == 16);
 373
 374 /* Action structure for OFPAT_SET_NW_SRC/DST. */
 375 struct ofp_action_nw_addr {
 376     uint16_t type;                  /* OFPAT_SET_TW_SRC/DST. */
 377     uint16_t len;                   /* Length is 8. */
 378     uint32_t nw_addr;               /* IP address. */
 379 };
 380 OFP_ASSERT(sizeof(struct ofp_action_nw_addr) == 8);
 381
 382 /* Action structure for OFPAT_SET_NW_TOS. */
 383 struct ofp_action_nw_tos {
 384     uint16_t type;                  /* OFPAT_SET_TW_TOS. */
 385     uint16_t len;                   /* Length is 8. */
 386     uint8_t nw_tos;                 /* IP TOS (DSCP field, 6 bits). */
 387     uint8_t pad[3];
 388 };
 389 OFP_ASSERT(sizeof(struct ofp_action_nw_tos) == 8);
 390
 391 /* Action structure for OFPAT_SET_TP_SRC/DST. */
 392 struct ofp_action_tp_port {
 393     uint16_t type;                  /* OFPAT_SET_TP_SRC/DST. */
 394     uint16_t len;                   /* Length is 8. */
 395     uint16_t tp_port;               /* TCP/UDP port. */
 396     uint8_t pad[2];
 397 };
 398 OFP_ASSERT(sizeof(struct ofp_action_tp_port) == 8);
 399
 400 /* Action header for OFPAT_VENDOR. The rest of the body is vendor-defined. */
 401 struct ofp_action_vendor_header {
 402     uint16_t type;                  /* OFPAT_VENDOR. */
 403     uint16_t len;                   /* Length is a multiple of 8. */
 404     uint32_t vendor;                /* Vendor ID, which takes the same form
 405                                        as in "struct ofp_vendor_header". */
 406 };
 407 OFP_ASSERT(sizeof(struct ofp_action_vendor_header) == 8);
 408
 409 /* Action header that is common to all actions.  The length includes the
 410  * header and any padding used to make the action 64-bit aligned.
 411  * NB: The length of an action *must* always be a multiple of eight. */
 412 struct ofp_action_header {
 413     uint16_t type;                  /* One of OFPAT_*. */
 414     uint16_t len;                   /* Length of action, including this
 415                                        header.  This is the length of action,
 416                                        including any padding to make it
 417                                        64-bit aligned. */
 418     uint8_t pad[4];
 419 };
 420 OFP_ASSERT(sizeof(struct ofp_action_header) == 8);
 421
 422 union ofp_action {
 423     uint16_t type;
 424     struct ofp_action_header header;
 425     struct ofp_action_vendor_header vendor;
 426     struct ofp_action_output output;
 427     struct ofp_action_vlan_vid vlan_vid;
 428     struct ofp_action_vlan_pcp vlan_pcp;
 429     struct ofp_action_nw_addr nw_addr;
 430     struct ofp_action_nw_tos nw_tos;
 431     struct ofp_action_tp_port tp_port;
 432 };
 433 OFP_ASSERT(sizeof(union ofp_action) == 8);
 434
 435 /* Send packet (controller -> datapath). */
 436 struct ofp_packet_out {
 437     struct ofp_header header;
 438     uint32_t buffer_id;           /* ID assigned by datapath (-1 if none). */
 439     uint16_t in_port;             /* Packet's input port (OFPP_NONE if none). */
 440     uint16_t actions_len;         /* Size of action array in bytes. */
 441     struct ofp_action_header actions[0]; /* Actions. */
 442     /* uint8_t data[0]; */        /* Packet data.  The length is inferred
 443                                      from the length field in the header.
 444                                      (Only meaningful if buffer_id == -1.) */
 445 };
 446 OFP_ASSERT(sizeof(struct ofp_packet_out) == 16);
 447
 448 enum ofp_flow_mod_command {
 449     OFPFC_ADD,              /* New flow. */
 450     OFPFC_MODIFY,           /* Modify all matching flows. */
 451     OFPFC_MODIFY_STRICT,    /* Modify entry strictly matching wildcards */
 452     OFPFC_DELETE,           /* Delete all matching flows. */
 453     OFPFC_DELETE_STRICT     /* Strictly match wildcards and priority. */
 454 };
 455
 456 /* Flow wildcards. */
 457 enum ofp_flow_wildcards {
 458     OFPFW_IN_PORT    = 1 << 0,  /* Switch input port. */
 459     OFPFW_DL_VLAN    = 1 << 1,  /* VLAN vid. */
 460     OFPFW_DL_SRC     = 1 << 2,  /* Ethernet source address. */
 461     OFPFW_DL_DST     = 1 << 3,  /* Ethernet destination address. */
 462     OFPFW_DL_TYPE    = 1 << 4,  /* Ethernet frame type. */
 463     OFPFW_NW_PROTO   = 1 << 5,  /* IP protocol. */
 464     OFPFW_TP_SRC     = 1 << 6,  /* TCP/UDP source port. */
 465     OFPFW_TP_DST     = 1 << 7,  /* TCP/UDP destination port. */
 466
 467     /* IP source address wildcard bit count.  0 is exact match, 1 ignores the
 468      * LSB, 2 ignores the 2 least-significant bits, ..., 32 and higher wildcard
 469      * the entire field.  This is the *opposite* of the usual convention where
 470      * e.g. /24 indicates that 8 bits (not 24 bits) are wildcarded. */
 471     OFPFW_NW_SRC_SHIFT = 8,
 472     OFPFW_NW_SRC_BITS = 6,
 473     OFPFW_NW_SRC_MASK = ((1 << OFPFW_NW_SRC_BITS) - 1) << OFPFW_NW_SRC_SHIFT,
 474     OFPFW_NW_SRC_ALL = 32 << OFPFW_NW_SRC_SHIFT,
 475
 476     /* IP destination address wildcard bit count.  Same format as source. */
 477     OFPFW_NW_DST_SHIFT = 14,
 478     OFPFW_NW_DST_BITS = 6,
 479     OFPFW_NW_DST_MASK = ((1 << OFPFW_NW_DST_BITS) - 1) << OFPFW_NW_DST_SHIFT,
 480     OFPFW_NW_DST_ALL = 32 << OFPFW_NW_DST_SHIFT,
 481
 482     OFPFW_DL_VLAN_PCP = 1 << 20, /* VLAN priority. */
 483     OFPFW_NW_TOS = 1 << 21, /* IP ToS (DSCP field, 6 bits). */
 484
 485     /* Wildcard all fields. */
 486     OFPFW_ALL = ((1 << 22) - 1)
 487 };
 488
 489 /* The wildcards for ICMP type and code fields use the transport source
 490  * and destination port fields, respectively. */
 491 #define OFPFW_ICMP_TYPE OFPFW_TP_SRC
 492 #define OFPFW_ICMP_CODE OFPFW_TP_DST
 493
 494 /* Values below this cutoff are 802.3 packets and the two bytes
 495  * following MAC addresses are used as a frame length.  Otherwise, the
 496  * two bytes are used as the Ethernet type.
 497  */
 498 #define OFP_DL_TYPE_ETH2_CUTOFF   0x0600
 499
 500 /* Value of dl_type to indicate that the frame does not include an
 501  * Ethernet type.
 502  */
 503 #define OFP_DL_TYPE_NOT_ETH_TYPE  0x05ff
 504
 505 /* The VLAN id is 12-bits, so we can use the entire 16 bits to indicate
 506  * special conditions.  All ones indicates that no VLAN id was set.
 507  */
 508 #define OFP_VLAN_NONE      0xffff
 509
 510 /* Fields to match against flows */
 511 struct ofp_match {
 512     uint32_t wildcards;        /* Wildcard fields. */
 513     uint16_t in_port;          /* Input switch port. */
 514     uint8_t dl_src[OFP_ETH_ALEN]; /* Ethernet source address. */
 515     uint8_t dl_dst[OFP_ETH_ALEN]; /* Ethernet destination address. */
 516     uint16_t dl_vlan;          /* Input VLAN. */
 517     uint8_t dl_vlan_pcp;       /* Input VLAN priority. */
 518     uint8_t pad1[1];           /* Align to 64-bits. */
 519     uint16_t dl_type;          /* Ethernet frame type. */
 520     uint8_t nw_tos;            /* IP ToS (DSCP field, 6 bits). */
 521     uint8_t nw_proto;          /* IP protocol or lower 8 bits of
 522                                   ARP opcode. */
 523     uint8_t pad2[2];           /* Align to 64-bits. */
 524     uint32_t nw_src;           /* IP source address. */
 525     uint32_t nw_dst;           /* IP destination address. */
 526     uint16_t tp_src;           /* TCP/UDP source port. */
 527     uint16_t tp_dst;           /* TCP/UDP destination port. */
 528 };
 529 OFP_ASSERT(sizeof(struct ofp_match) == 40);
 530
 531 /* The match fields for ICMP type and code use the transport source and
 532  * destination port fields, respectively. */
 533 #define icmp_type tp_src
 534 #define icmp_code tp_dst
 535
 536 /* Value used in "idle_timeout" and "hard_timeout" to indicate that the entry
 537  * is permanent. */
 538 #define OFP_FLOW_PERMANENT 0
 539
 540 /* By default, choose a priority in the middle. */
 541 #define OFP_DEFAULT_PRIORITY 0x8000
 542
 543 enum ofp_flow_mod_flags {
 544     OFPFF_SEND_FLOW_REM = 1 << 0,  /* Send flow removed message when flow
 545                                     * expires or is deleted. */
 546     OFPFF_CHECK_OVERLAP = 1 << 1,  /* Check for overlapping entries first. */
 547     OFPFF_EMERG         = 1 << 2   /* Ramark this is for emergency. */
 548 };
 549
 550 /* Flow setup and teardown (controller -> datapath). */
 551 struct ofp_flow_mod {
 552     struct ofp_header header;
 553     struct ofp_match match;      /* Fields to match */
 554     uint64_t cookie;             /* Opaque controller-issued identifier. */
 555
 556     /* Flow actions. */
 557     uint16_t command;             /* One of OFPFC_*. */
 558     uint16_t idle_timeout;        /* Idle time before discarding (seconds). */
 559     uint16_t hard_timeout;        /* Max time before discarding (seconds). */
 560     uint16_t priority;            /* Priority level of flow entry. */
 561     uint32_t buffer_id;           /* Buffered packet to apply to (or -1).
 562                                      Not meaningful for OFPFC_DELETE*. */
 563     uint16_t out_port;            /* For OFPFC_DELETE* commands, require
 564                                      matching entries to include this as an
 565                                      output port.  A value of OFPP_NONE
 566                                      indicates no restriction. */
 567     uint16_t flags;               /* One of OFPFF_*. */
 568     struct ofp_action_header actions[0]; /* The action length is inferred
 569                                             from the length field in the
 570                                             header. */
 571 };
 572 OFP_ASSERT(sizeof(struct ofp_flow_mod) == 72);
 573
 574 /* Why was this flow removed? */
 575 enum ofp_flow_removed_reason {
 576     OFPRR_IDLE_TIMEOUT,         /* Flow idle time exceeded idle_timeout. */
 577     OFPRR_HARD_TIMEOUT,         /* Time exceeded hard_timeout. */
 578     OFPRR_DELETE                /* Evicted by a DELETE flow mod. */
 579 };
 580
 581 /* Flow removed (datapath -> controller). */
 582 struct ofp_flow_removed {
 583     struct ofp_header header;
 584     struct ofp_match match;   /* Description of fields. */
 585     uint64_t cookie;          /* Opaque controller-issued identifier. */
 586
 587     uint16_t priority;        /* Priority level of flow entry. */
 588     uint8_t reason;           /* One of OFPRR_*. */
 589     uint8_t pad[1];           /* Align to 32-bits. */
 590
 591     uint32_t duration_sec;    /* Time flow was alive in seconds. */
 592     uint32_t duration_nsec;   /* Time flow was alive in nanoseconds beyond
 593                                  duration_sec. */
 594     uint16_t idle_timeout;    /* Idle timeout from original flow mod. */
 595     uint8_t pad2[2];          /* Align to 64-bits. */
 596     uint64_t packet_count;
 597     uint64_t byte_count;
 598 };
 599 OFP_ASSERT(sizeof(struct ofp_flow_removed) == 88);
 600
 601 /* Values for 'type' in ofp_error_message.  These values are immutable: they
 602  * will not change in future versions of the protocol (although new values may
 603  * be added). */
 604 enum ofp_error_type {
 605     OFPET_HELLO_FAILED,         /* Hello protocol failed. */
 606     OFPET_BAD_REQUEST,          /* Request was not understood. */
 607     OFPET_BAD_ACTION,           /* Error in action description. */
 608     OFPET_FLOW_MOD_FAILED,      /* Problem modifying flow entry. */
 609     OFPET_PORT_MOD_FAILED,      /* OFPT_PORT_MOD failed. */
 610     OFPET_QUEUE_OP_FAILED       /* Queue operation failed. */
 611 };
 612
 613 /* ofp_error_msg 'code' values for OFPET_HELLO_FAILED.  'data' contains an
 614  * ASCII text string that may give failure details. */
 615 enum ofp_hello_failed_code {
 616     OFPHFC_INCOMPATIBLE,        /* No compatible version. */
 617     OFPHFC_EPERM                /* Permissions error. */
 618 };
 619
 620 /* ofp_error_msg 'code' values for OFPET_BAD_REQUEST.  'data' contains at least
 621  * the first 64 bytes of the failed request. */
 622 enum ofp_bad_request_code {
 623     OFPBRC_BAD_VERSION,         /* ofp_header.version not supported. */
 624     OFPBRC_BAD_TYPE,            /* ofp_header.type not supported. */
 625     OFPBRC_BAD_STAT,            /* ofp_stats_request.type not supported. */
 626     OFPBRC_BAD_VENDOR,          /* Vendor not supported (in ofp_vendor_header
 627                                  * or ofp_stats_request or ofp_stats_reply). */
 628     OFPBRC_BAD_SUBTYPE,         /* Vendor subtype not supported. */
 629     OFPBRC_EPERM,               /* Permissions error. */
 630     OFPBRC_BAD_LEN,             /* Wrong request length for type. */
 631     OFPBRC_BUFFER_EMPTY,        /* Specified buffer has already been used. */
 632     OFPBRC_BUFFER_UNKNOWN       /* Specified buffer does not exist. */
 633 };
 634
 635 /* ofp_error_msg 'code' values for OFPET_BAD_ACTION.  'data' contains at least
 636  * the first 64 bytes of the failed request. */
 637 enum ofp_bad_action_code {
 638     OFPBAC_BAD_TYPE,           /* Unknown action type. */
 639     OFPBAC_BAD_LEN,            /* Length problem in actions. */
 640     OFPBAC_BAD_VENDOR,         /* Unknown vendor id specified. */
 641     OFPBAC_BAD_VENDOR_TYPE,    /* Unknown action type for vendor id. */
 642     OFPBAC_BAD_OUT_PORT,       /* Problem validating output action. */
 643     OFPBAC_BAD_ARGUMENT,       /* Bad action argument. */
 644     OFPBAC_EPERM,              /* Permissions error. */
 645     OFPBAC_TOO_MANY,           /* Can't handle this many actions. */
 646     OFPBAC_BAD_QUEUE           /* Problem validating output queue. */
 647 };
 648
 649 /* ofp_error_msg 'code' values for OFPET_FLOW_MOD_FAILED.  'data' contains
 650  * at least the first 64 bytes of the failed request. */
 651 enum ofp_flow_mod_failed_code {
 652     OFPFMFC_ALL_TABLES_FULL,    /* Flow not added because of full tables. */
 653     OFPFMFC_OVERLAP,            /* Attempted to add overlapping flow with
 654                                  * CHECK_OVERLAP flag set. */
 655     OFPFMFC_EPERM,              /* Permissions error. */
 656     OFPFMFC_BAD_EMERG_TIMEOUT,  /* Flow not added because of non-zero idle/hard
 657                                  * timeout. */
 658     OFPFMFC_BAD_COMMAND,        /* Unknown command. */
 659     OFPFMFC_UNSUPPORTED         /* Unsupported action list - cannot process in
 660                                    the order specified. */
 661 };
 662
 663 /* ofp_error_msg 'code' values for OFPET_PORT_MOD_FAILED.  'data' contains
 664  * at least the first 64 bytes of the failed request. */
 665 enum ofp_port_mod_failed_code {
 666     OFPPMFC_BAD_PORT,            /* Specified port does not exist. */
 667     OFPPMFC_BAD_HW_ADDR,         /* Specified hardware address is wrong. */
 668 };
 669
 670 /* ofp_error msg 'code' values for OFPET_QUEUE_OP_FAILED. 'data' contains
 671  * at least the first 64 bytes of the failed request */
 672 enum ofp_queue_op_failed_code {
 673     OFPQOFC_BAD_PORT,           /* Invalid port (or port does not exist). */
 674     OFPQOFC_BAD_QUEUE,          /* Queue does not exist. */
 675     OFPQOFC_EPERM               /* Permissions error. */
 676 };
 677
 678 /* OFPT_ERROR: Error message (datapath -> controller). */
 679 struct ofp_error_msg {
 680     struct ofp_header header;
 681
 682     uint16_t type;
 683     uint16_t code;
 684     uint8_t data[0];          /* Variable-length data.  Interpreted based
 685                                  on the type and code. */
 686 };
 687 OFP_ASSERT(sizeof(struct ofp_error_msg) == 12);
 688
 689 enum ofp_stats_types {
 690     /* Description of this OpenFlow switch.
 691      * The request body is empty.
 692      * The reply body is struct ofp_desc_stats. */
 693     OFPST_DESC,
 694
 695     /* Individual flow statistics.
 696      * The request body is struct ofp_flow_stats_request.
 697      * The reply body is an array of struct ofp_flow_stats. */
 698     OFPST_FLOW,
 699
 700     /* Aggregate flow statistics.
 701      * The request body is struct ofp_aggregate_stats_request.
 702      * The reply body is struct ofp_aggregate_stats_reply. */
 703     OFPST_AGGREGATE,
 704
 705     /* Flow table statistics.
 706      * The request body is empty.
 707      * The reply body is an array of struct ofp_table_stats. */
 708     OFPST_TABLE,
 709
 710     /* Physical port statistics.
 711      * The request body is struct ofp_port_stats_request.
 712      * The reply body is an array of struct ofp_port_stats. */
 713     OFPST_PORT,
 714
 715     /* Queue statistics for a port
 716      * The request body defines the port
 717      * The reply body is an array of struct ofp_queue_stats */
 718     OFPST_QUEUE,
 719
 720     /* Vendor extension.
 721      * The request and reply bodies begin with a 32-bit vendor ID, which takes
 722      * the same form as in "struct ofp_vendor_header".  The request and reply
 723      * bodies are otherwise vendor-defined. */
 724     OFPST_VENDOR = 0xffff
 725 };
 726
 727 struct ofp_stats_request {
 728     struct ofp_header header;
 729     uint16_t type;              /* One of the OFPST_* constants. */
 730     uint16_t flags;             /* OFPSF_REQ_* flags (none yet defined). */
 731     uint8_t body[0];            /* Body of the request. */
 732 };
 733 OFP_ASSERT(sizeof(struct ofp_stats_request) == 12);
 734
 735 enum ofp_stats_reply_flags {
 736     OFPSF_REPLY_MORE  = 1 << 0  /* More replies to follow. */
 737 };
 738
 739 struct ofp_stats_reply {
 740     struct ofp_header header;
 741     uint16_t type;              /* One of the OFPST_* constants. */
 742     uint16_t flags;             /* OFPSF_REPLY_* flags. */
 743     uint8_t body[0];            /* Body of the reply. */
 744 };
 745 OFP_ASSERT(sizeof(struct ofp_stats_reply) == 12);
 746
 747 #define DESC_STR_LEN   256
 748 #define SERIAL_NUM_LEN 32
 749 /* Body of reply to OFPST_DESC request.  Each entry is a NULL-terminated
 750  * ASCII string. */
 751 struct ofp_desc_stats {
 752     char mfr_desc[DESC_STR_LEN];       /* Manufacturer description. */
 753     char hw_desc[DESC_STR_LEN];        /* Hardware description. */
 754     char sw_desc[DESC_STR_LEN];        /* Software description. */
 755     char serial_num[SERIAL_NUM_LEN];   /* Serial number. */
 756     char dp_desc[DESC_STR_LEN];        /* Human readable description of
 757                                           the datapath. */
 758 };
 759 OFP_ASSERT(sizeof(struct ofp_desc_stats) == 1056);
 760
 761 /* Body for ofp_stats_request of type OFPST_FLOW. */
 762 struct ofp_flow_stats_request {
 763     struct ofp_match match;   /* Fields to match. */
 764     uint8_t table_id;         /* ID of table to read (from ofp_table_stats)
 765                                  or 0xff for all tables. */
 766     uint8_t pad;              /* Align to 32 bits. */
 767     uint16_t out_port;        /* Require matching entries to include this
 768                                  as an output port.  A value of OFPP_NONE
 769                                  indicates no restriction. */
 770 };
 771 OFP_ASSERT(sizeof(struct ofp_flow_stats_request) == 44);
 772
 773 /* Body of reply to OFPST_FLOW request. */
 774 struct ofp_flow_stats {
 775     uint16_t length;          /* Length of this entry. */
 776     uint8_t table_id;         /* ID of table flow came from. */
 777     uint8_t pad;
 778     struct ofp_match match;   /* Description of fields. */
 779     uint32_t duration_sec;    /* Time flow has been alive in seconds. */
 780     uint32_t duration_nsec;   /* Time flow has been alive in nanoseconds
 781                                  beyond duration_sec. */
 782     uint16_t priority;        /* Priority of the entry. Only meaningful
 783                                  when this is not an exact-match entry. */
 784     uint16_t idle_timeout;    /* Number of seconds idle before expiration. */
 785     uint16_t hard_timeout;    /* Number of seconds before expiration. */
 786     uint8_t pad2[6];          /* Align to 64 bits. */
 787     uint64_t cookie;          /* Opaque controller-issued identifier. */
 788     uint64_t packet_count;    /* Number of packets in flow. */
 789     uint64_t byte_count;      /* Number of bytes in flow. */
 790     struct ofp_action_header actions[0]; /* Actions. */
 791 };
 792 OFP_ASSERT(sizeof(struct ofp_flow_stats) == 88);
 793
 794 /* Body for ofp_stats_request of type OFPST_AGGREGATE. */
 795 struct ofp_aggregate_stats_request {
 796     struct ofp_match match;   /* Fields to match. */
 797     uint8_t table_id;         /* ID of table to read (from ofp_table_stats)
 798                                  or 0xff for all tables. */
 799     uint8_t pad;              /* Align to 32 bits. */
 800     uint16_t out_port;        /* Require matching entries to include this
 801                                  as an output port.  A value of OFPP_NONE
 802                                  indicates no restriction. */
 803 };
 804 OFP_ASSERT(sizeof(struct ofp_aggregate_stats_request) == 44);
 805
 806 /* Body of reply to OFPST_AGGREGATE request. */
 807 struct ofp_aggregate_stats_reply {
 808     uint64_t packet_count;    /* Number of packets in flows. */
 809     uint64_t byte_count;      /* Number of bytes in flows. */
 810     uint32_t flow_count;      /* Number of flows. */
 811     uint8_t pad[4];           /* Align to 64 bits. */
 812 };
 813 OFP_ASSERT(sizeof(struct ofp_aggregate_stats_reply) == 24);
 814
 815 /* Body of reply to OFPST_TABLE request. */
 816 struct ofp_table_stats {
 817     uint8_t table_id;        /* Identifier of table.  Lower numbered tables
 818                                 are consulted first. */
 819     uint8_t pad[3];          /* Align to 32-bits. */
 820     char name[OFP_MAX_TABLE_NAME_LEN];
 821     uint32_t wildcards;      /* Bitmap of OFPFW_* wildcards that are
 822                                 supported by the table. */
 823     uint32_t max_entries;    /* Max number of entries supported. */
 824     uint32_t active_count;   /* Number of active entries. */
 825     uint64_t lookup_count;   /* Number of packets looked up in table. */
 826     uint64_t matched_count;  /* Number of packets that hit table. */
 827 };
 828 OFP_ASSERT(sizeof(struct ofp_table_stats) == 64);
 829
 830 /* Body for ofp_stats_request of type OFPST_PORT. */
 831 struct ofp_port_stats_request {
 832     uint16_t port_no;        /* OFPST_PORT message may request statistics
 833                                 for a single port (specified with port_no)
 834                                 or for all ports (port_no == OFPP_NONE). */
 835     uint8_t pad[6];
 836 };
 837 OFP_ASSERT(sizeof(struct ofp_port_stats_request) == 8);
 838
 839 /* Body of reply to OFPST_PORT request. If a counter is unsupported, set
 840  * the field to all ones. */
 841 struct ofp_port_stats {
 842     uint16_t port_no;
 843     uint8_t pad[6];          /* Align to 64-bits. */
 844     uint64_t rx_packets;     /* Number of received packets. */
 845     uint64_t tx_packets;     /* Number of transmitted packets. */
 846     uint64_t rx_bytes;       /* Number of received bytes. */
 847     uint64_t tx_bytes;       /* Number of transmitted bytes. */
 848     uint64_t rx_dropped;     /* Number of packets dropped by RX. */
 849     uint64_t tx_dropped;     /* Number of packets dropped by TX. */
 850     uint64_t rx_errors;      /* Number of receive errors.  This is a super-set
 851                                 of receive errors and should be great than or
 852                                 equal to the sum of all rx_*_err values. */
 853     uint64_t tx_errors;      /* Number of transmit errors.  This is a super-set
 854                                 of transmit errors. */
 855     uint64_t rx_frame_err;   /* Number of frame alignment errors. */
 856     uint64_t rx_over_err;    /* Number of packets with RX overrun. */
 857     uint64_t rx_crc_err;     /* Number of CRC errors. */
 858     uint64_t collisions;     /* Number of collisions. */
 859 };
 860 OFP_ASSERT(sizeof(struct ofp_port_stats) == 104);
 861
 862 /* Vendor extension. */
 863 struct ofp_vendor_header {
 864     struct ofp_header header;   /* Type OFPT_VENDOR. */
 865     uint32_t vendor;            /* Vendor ID:
 866                                  * - MSB 0: low-order bytes are IEEE OUI.
 867                                  * - MSB != 0: defined by OpenFlow
 868                                  *   consortium. */
 869     /* Vendor-defined arbitrary additional data. */
 870 };
 871 OFP_ASSERT(sizeof(struct ofp_vendor_header) == 12);
 872
 873 #endif /* openflow/openflow.h */