text: /* Copyright (c) 2008, 2011, 2012, 2013 The Board of Trustees of The Leland Stanford
   * Junior University
   *
   * We are making the OpenFlow specification and associated documentation
   * (Software) available for public use and benefit with the expectation
   * that others will use, modify and enhance the Software and contribute
   * those enhancements back to the community. However, since we would
   * like to make the Software available for broadest use, with as few
   * restrictions as possible permission is hereby granted, free of
   * charge, to any person obtaining a copy of this Software to deal in
   * the Software under the copyrights without restriction, including
   * without limitation the rights to use, copy, modify, merge, publish,
   * distribute, sublicense, and/or sell copies of the Software, and to
   * permit persons to whom the Software is furnished to do so, subject to
   * the following conditions:
   *
   * The above copyright notice and this permission notice shall be
   * included in all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
   * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
   * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   *
   * The name and trademarks of copyright holder(s) may NOT be used in
   * advertising or publicity pertaining to the Software or any
   * derivatives without specific, written prior permission.
   */
  
  /*
   * Copyright (c) 2008, 2009, 2010, 2011 Nicira, Inc.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at:
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  /* OpenFlow: protocol between controller and datapath. */
  
  #ifndef OPENFLOW_11_H
  #define OPENFLOW_11_H 1
  
  #include "openflow/openflow-common.h"
  
  /* OpenFlow 1.1 uses 32-bit port numbers.  Open vSwitch, for now, uses OpenFlow
   * 1.0 port numbers internally.  We map them to OpenFlow 1.0 as follows:
   *
   * OF1.1                    <=>  OF1.0
   * -----------------------       ---------------
   * 0x00000000...0x0000feff  <=>  0x0000...0xfeff  "physical" ports
   * 0x0000ff00...0xfffffeff  <=>  not supported
   * 0xffffff00...0xffffffff  <=>  0xff00...0xffff  "reserved" OFPP_* ports
   *
   * OFPP11_OFFSET is the value that must be added or subtracted to convert
   * an OpenFlow 1.0 reserved port number to or from, respectively, the
   * corresponding OpenFlow 1.1 reserved port number.
   */
  #define OFPP11_MAX    OFP11_PORT_C(0xffffff00)
  #define OFPP11_OFFSET 0xffff0000    /* OFPP11_MAX - OFPP_MAX */
  
  /* Reserved wildcard port used only for flow mod (delete) and flow stats
   * requests. Selects all flows regardless of output port
   * (including flows with no output port)
   *
   * Define it via OFPP_NONE (0xFFFF) so that OFPP_ANY is still an enum ofp_port
   */
  #define OFPP_ANY OFPP_NONE
  
  /* OpenFlow 1.1 port config flags are just the common flags. */
  #define OFPPC11_ALL \
      (OFPPC_PORT_DOWN | OFPPC_NO_RECV | OFPPC_NO_FWD | OFPPC_NO_PACKET_IN)
  
  /* OpenFlow 1.1 specific current state of the physical port.  These are not
   * configurable from the controller.
   */
  enum ofp11_port_state {
      OFPPS11_BLOCKED      = 1 << 1,  /* Port is blocked */
      OFPPS11_LIVE         = 1 << 2,  /* Live for Fast Failover Group. */
  #define OFPPS11_ALL (OFPPS_LINK_DOWN | OFPPS11_BLOCKED | OFPPS11_LIVE)
  };
  
  /* OpenFlow 1.1 specific features of ports available in a datapath. */
  enum ofp11_port_features {
      OFPPF11_40GB_FD    = 1 << 7,  /* 40 Gb full-duplex rate support. */
      OFPPF11_100GB_FD   = 1 << 8,  /* 100 Gb full-duplex rate support. */
      OFPPF11_1TB_FD     = 1 << 9,  /* 1 Tb full-duplex rate support. */
      OFPPF11_OTHER      = 1 << 10, /* Other rate, not in the list. */
  
      OFPPF11_COPPER     = 1 << 11, /* Copper medium. */
      OFPPF11_FIBER      = 1 << 12, /* Fiber medium. */
      OFPPF11_AUTONEG    = 1 << 13, /* Auto-negotiation. */
      OFPPF11_PAUSE      = 1 << 14, /* Pause. */
      OFPPF11_PAUSE_ASYM = 1 << 15  /* Asymmetric pause. */
  #define OFPPF11_ALL ((1 << 16) - 1)
  };
  
  /* Description of a port */
  struct ofp11_port {
      ovs_be32 port_no;
      uint8_t pad[4];
      uint8_t hw_addr[OFP_ETH_ALEN];
      uint8_t pad2[2];                  /* Align to 64 bits. */
      char name[OFP_MAX_PORT_NAME_LEN]; /* Null-terminated */
  
      ovs_be32 config;        /* Bitmap of OFPPC_* flags. */
      ovs_be32 state;         /* Bitmap of OFPPS_* and OFPPS11_* flags. */
  
      /* Bitmaps of OFPPF_* and OFPPF11_* that describe features.  All bits
       * zeroed if unsupported or unavailable. */
      ovs_be32 curr;          /* Current features. */
      ovs_be32 advertised;    /* Features being advertised by the port. */
      ovs_be32 supported;     /* Features supported by the port. */
      ovs_be32 peer;          /* Features advertised by peer. */
  
      ovs_be32 curr_speed;    /* Current port bitrate in kbps. */
      ovs_be32 max_speed;     /* Max port bitrate in kbps */
  };
  OFP_ASSERT(sizeof(struct ofp11_port) == 64);
  
  /* Modify behavior of the physical port */
  struct ofp11_port_mod {
      ovs_be32 port_no;
      uint8_t pad[4];
      uint8_t hw_addr[OFP_ETH_ALEN]; /* The hardware address is not
                                        configurable.  This is used to
                                        sanity-check the request, so it must
                                        be the same as returned in an
                                        ofp11_port struct. */
      uint8_t pad2[2];        /* Pad to 64 bits. */
      ovs_be32 config;        /* Bitmap of OFPPC_* flags. */
      ovs_be32 mask;          /* Bitmap of OFPPC_* flags to be changed. */
  
      ovs_be32 advertise;     /* Bitmap of OFPPF_* and OFPPF11_*.  Zero all bits
                                 to prevent any action taking place. */
      uint8_t pad3[4];        /* Pad to 64 bits. */
  };
  OFP_ASSERT(sizeof(struct ofp11_port_mod) == 32);
  
  /* Group setup and teardown (controller -> datapath). */
  struct ofp11_group_mod {
      ovs_be16 command;             /* One of OFPGC11_*. */
      uint8_t type;                 /* One of OFPGT11_*. */
      uint8_t pad;                  /* Pad to 64 bits. */
      ovs_be32 group_id;            /* Group identifier. */
      /* struct ofp11_bucket buckets[0]; The bucket length is inferred from the
                                         length field in the header. */
  };
  OFP_ASSERT(sizeof(struct ofp11_group_mod) == 8);
  
  /* Query for port queue configuration. */
  struct ofp11_queue_get_config_request {
      ovs_be32 port;
      /* Port to be queried. Should refer
         to a valid physical port (i.e. < OFPP_MAX) */
      uint8_t pad[4];
  };
  OFP_ASSERT(sizeof(struct ofp11_queue_get_config_request) == 8);
  
  /* Group commands */
  enum ofp11_group_mod_command {
      OFPGC11_ADD,          /* New group. */
      OFPGC11_MODIFY,       /* Modify all matching groups. */
      OFPGC11_DELETE,       /* Delete all matching groups. */
  };
  
  /* OpenFlow 1.1 specific capabilities supported by the datapath (struct
   * ofp_switch_features, member capabilities). */
  enum ofp11_capabilities {
      OFPC11_GROUP_STATS    = 1 << 3,  /* Group statistics. */
  };
  
  enum ofp11_action_type {
      OFPAT11_OUTPUT,           /* Output to switch port. */
      OFPAT11_SET_VLAN_VID,     /* Set the 802.1q VLAN id. */
      OFPAT11_SET_VLAN_PCP,     /* Set the 802.1q priority. */
      OFPAT11_SET_DL_SRC,       /* Ethernet source address. */
      OFPAT11_SET_DL_DST,       /* Ethernet destination address. */
      OFPAT11_SET_NW_SRC,       /* IP source address. */
      OFPAT11_SET_NW_DST,       /* IP destination address. */
      OFPAT11_SET_NW_TOS,       /* IP ToS (DSCP field, 6 bits). */
      OFPAT11_SET_NW_ECN,       /* IP ECN (2 bits). */
      OFPAT11_SET_TP_SRC,       /* TCP/UDP/SCTP source port. */
      OFPAT11_SET_TP_DST,       /* TCP/UDP/SCTP destination port. */
      OFPAT11_COPY_TTL_OUT,     /* Copy TTL "outwards" -- from next-to-outermost
                                   to outermost */
      OFPAT11_COPY_TTL_IN,      /* Copy TTL "inwards" -- from outermost to
                                 next-to-outermost */
      OFPAT11_SET_MPLS_LABEL,   /* MPLS label */
      OFPAT11_SET_MPLS_TC,      /* MPLS TC */
      OFPAT11_SET_MPLS_TTL,     /* MPLS TTL */
      OFPAT11_DEC_MPLS_TTL,     /* Decrement MPLS TTL */
  
      OFPAT11_PUSH_VLAN,        /* Push a new VLAN tag */
      OFPAT11_POP_VLAN,         /* Pop the outer VLAN tag */
      OFPAT11_PUSH_MPLS,        /* Push a new MPLS Label Stack Entry */
      OFPAT11_POP_MPLS,         /* Pop the outer MPLS Label Stack Entry */
      OFPAT11_SET_QUEUE,        /* Set queue id when outputting to a port */
      OFPAT11_GROUP,            /* Apply group. */
      OFPAT11_SET_NW_TTL,       /* IP TTL. */
      OFPAT11_DEC_NW_TTL,       /* Decrement IP TTL. */
      OFPAT11_EXPERIMENTER = 0xffff
  };
  
  #define OFPMT11_STANDARD_LENGTH 88
  
  struct ofp11_match_header {
      ovs_be16 type;             /* One of OFPMT_* */
      ovs_be16 length;           /* Length of match */
  };
  OFP_ASSERT(sizeof(struct ofp11_match_header) == 4);
  
  /* Fields to match against flows */
  struct ofp11_match {
      struct ofp11_match_header omh;
      ovs_be32 in_port;          /* Input switch port. */
      ovs_be32 wildcards;        /* Wildcard fields. */
      uint8_t dl_src[OFP_ETH_ALEN]; /* Ethernet source address. */
      uint8_t dl_src_mask[OFP_ETH_ALEN]; /* Ethernet source address mask.  */
      uint8_t dl_dst[OFP_ETH_ALEN]; /* Ethernet destination address. */
      uint8_t dl_dst_mask[OFP_ETH_ALEN]; /* Ethernet destination address mask. */
      ovs_be16 dl_vlan;          /* Input VLAN id. */
      uint8_t dl_vlan_pcp;       /* Input VLAN priority. */
      uint8_t pad1[1];           /* Align to 32-bits */
      ovs_be16 dl_type;          /* Ethernet frame type. */
      uint8_t nw_tos;            /* IP ToS (actually DSCP field, 6 bits). */
      uint8_t nw_proto;          /* IP protocol or lower 8 bits of ARP opcode. */
      ovs_be32 nw_src;           /* IP source address. */
      ovs_be32 nw_src_mask;      /* IP source address mask. */
      ovs_be32 nw_dst;           /* IP destination address. */
      ovs_be32 nw_dst_mask;      /* IP destination address mask. */
      ovs_be16 tp_src;           /* TCP/UDP/SCTP source port. */
      ovs_be16 tp_dst;           /* TCP/UDP/SCTP destination port. */
      ovs_be32 mpls_label;       /* MPLS label. */
      uint8_t mpls_tc;           /* MPLS TC. */
      uint8_t pad2[3];           /* Align to 64-bits */
      ovs_be64 metadata;         /* Metadata passed between tables. */
      ovs_be64 metadata_mask;    /* Mask for metadata. */
  };
  OFP_ASSERT(sizeof(struct ofp11_match) == OFPMT11_STANDARD_LENGTH);
  
  /* Flow wildcards. */
  enum ofp11_flow_wildcards {
      OFPFW11_IN_PORT     = 1 << 0,  /* Switch input port. */
      OFPFW11_DL_VLAN     = 1 << 1,  /* VLAN id. */
      OFPFW11_DL_VLAN_PCP = 1 << 2,  /* VLAN priority. */
      OFPFW11_DL_TYPE     = 1 << 3,  /* Ethernet frame type. */
      OFPFW11_NW_TOS      = 1 << 4,  /* IP ToS (DSCP field, 6 bits). */
      OFPFW11_NW_PROTO    = 1 << 5,  /* IP protocol. */
      OFPFW11_TP_SRC      = 1 << 6,  /* TCP/UDP/SCTP source port. */
      OFPFW11_TP_DST      = 1 << 7,  /* TCP/UDP/SCTP destination port. */
      OFPFW11_MPLS_LABEL  = 1 << 8,  /* MPLS label. */
      OFPFW11_MPLS_TC     = 1 << 9,  /* MPLS TC. */
  
      /* Wildcard all fields. */
      OFPFW11_ALL           = ((1 << 10) - 1)
  };
  
  /* The VLAN id is 12-bits, so we can use the entire 16 bits to indicate
   * special conditions.
   */
  enum ofp11_vlan_id {
      OFPVID11_ANY = 0xfffe,  /* Indicate that a VLAN id is set but don't care
                                 about it's value. Note: only valid when
                                 specifying the VLAN id in a match */
      OFPVID11_NONE = 0xffff, /* No VLAN id was set. */
  };
  
  enum ofp11_instruction_type {
      OFPIT11_GOTO_TABLE = 1,        /* Setup the next table in the lookup
                                        pipeline */
      OFPIT11_WRITE_METADATA = 2,    /* Setup the metadata field for use later
                                        in pipeline */
      OFPIT11_WRITE_ACTIONS = 3,     /* Write the action(s) onto the datapath
                                        action set */
      OFPIT11_APPLY_ACTIONS = 4,     /* Applies the action(s) immediately */
      OFPIT11_CLEAR_ACTIONS = 5,     /* Clears all actions from the datapath
                                        action set */
      OFPIT11_EXPERIMENTER = 0xFFFF  /* Experimenter instruction */
  };
  
  #define OFPIT11_ALL (OFPIT11_GOTO_TABLE | OFPIT11_WRITE_METADATA |      \
                       OFPIT11_WRITE_ACTIONS | OFPIT11_APPLY_ACTIONS |    \
                       OFPIT11_CLEAR_ACTIONS)
  
  #define OFP11_INSTRUCTION_ALIGN 8
  
  /* Generic ofp_instruction structure. */
  struct ofp11_instruction {
      ovs_be16 type;              /* Instruction type */
      ovs_be16 len;               /* Length of this struct in bytes. */
      uint8_t pad[4];             /* Align to 64-bits */
  };
  OFP_ASSERT(sizeof(struct ofp11_instruction) == 8);
  
  /* Instruction structure for OFPIT_GOTO_TABLE */
  struct ofp11_instruction_goto_table {
      ovs_be16 type;                 /* OFPIT_GOTO_TABLE */
      ovs_be16 len;                  /* Length of this struct in bytes. */
      uint8_t table_id;              /* Set next table in the lookup pipeline */
      uint8_t pad[3];                /* Pad to 64 bits. */
  };
  OFP_ASSERT(sizeof(struct ofp11_instruction_goto_table) == 8);
  
  /* Instruction structure for OFPIT_WRITE_METADATA */
  struct ofp11_instruction_write_metadata {
      ovs_be16 type;              /* OFPIT_WRITE_METADATA */
      ovs_be16 len;               /* Length of this struct in bytes. */
      uint8_t pad[4];             /* Align to 64-bits */
      ovs_be64 metadata;          /* Metadata value to write */
      ovs_be64 metadata_mask;     /* Metadata write bitmask */
  };
  OFP_ASSERT(sizeof(struct ofp11_instruction_write_metadata) == 24);
  
  /* Instruction structure for OFPIT_WRITE/APPLY/CLEAR_ACTIONS */
  struct ofp11_instruction_actions {
      ovs_be16 type;              /* One of OFPIT_*_ACTIONS */
      ovs_be16 len;               /* Length of this struct in bytes. */
      uint8_t pad[4];             /* Align to 64-bits */
      /* struct ofp_action_header actions[0];  Actions associated with
                                               OFPIT_WRITE_ACTIONS and
                                               OFPIT_APPLY_ACTIONS */
  };
  OFP_ASSERT(sizeof(struct ofp11_instruction_actions) == 8);
  
  /* Instruction structure for experimental instructions */
  struct ofp11_instruction_experimenter {
      ovs_be16 type;              /* OFPIT11_EXPERIMENTER */
      ovs_be16 len;               /* Length of this struct in bytes */
      ovs_be32 experimenter;      /* Experimenter ID which takes the same form
                                     as in struct ofp_vendor_header. */
      /* Experimenter-defined arbitrary additional data. */
  };
  OFP_ASSERT(sizeof(struct ofp11_instruction_experimenter) == 8);
  
  /* Action structure for OFPAT_OUTPUT, which sends packets out 'port'.
     * When the 'port' is the OFPP_CONTROLLER, 'max_len' indicates the max
     * number of bytes to send. A 'max_len' of zero means no bytes of the
     * packet should be sent.*/
  struct ofp11_action_output {
      ovs_be16 type;                    /* OFPAT11_OUTPUT. */
      ovs_be16 len;                     /* Length is 16. */
      ovs_be32 port;                    /* Output port. */
      ovs_be16 max_len;                 /* Max length to send to controller. */
      uint8_t pad[6];                   /* Pad to 64 bits. */
  };
  OFP_ASSERT(sizeof(struct ofp11_action_output) == 16);
  
  /* Action structure for OFPAT_GROUP. */
  struct ofp11_action_group {
      ovs_be16 type;                    /* OFPAT11_GROUP. */
      ovs_be16 len;                     /* Length is 8. */
      ovs_be32 group_id;                /* Group identifier. */
  };
  OFP_ASSERT(sizeof(struct ofp11_action_group) == 8);
  
  /* OFPAT_SET_QUEUE action struct: send packets to given queue on port. */
  struct ofp11_action_set_queue {
      ovs_be16 type;                    /* OFPAT11_SET_QUEUE. */
      ovs_be16 len;                     /* Len is 8. */
      ovs_be32 queue_id;                /* Queue id for the packets. */
  };
  OFP_ASSERT(sizeof(struct ofp11_action_set_queue) == 8);
  
  /* Action structure for OFPAT11_SET_MPLS_LABEL. */
  struct ofp11_action_mpls_label {
      ovs_be16 type;                    /* OFPAT11_SET_MPLS_LABEL. */
      ovs_be16 len;                     /* Length is 8. */
      ovs_be32 mpls_label;              /* MPLS label */
  };
  OFP_ASSERT(sizeof(struct ofp11_action_mpls_label) == 8);
  
  /* Action structure for OFPAT11_SET_MPLS_TC. */
  struct ofp11_action_mpls_tc {
      ovs_be16 type;                    /* OFPAT11_SET_MPLS_TC. */
      ovs_be16 len;                     /* Length is 8. */
      uint8_t mpls_tc;                  /* MPLS TC */
      uint8_t pad[3];
  };
  OFP_ASSERT(sizeof(struct ofp11_action_mpls_tc) == 8);
  
  /* Action structure for OFPAT11_SET_MPLS_TTL. */
  struct ofp11_action_mpls_ttl {
      ovs_be16 type;                    /* OFPAT11_SET_MPLS_TTL. */
      ovs_be16 len;                     /* Length is 8. */
      uint8_t mpls_ttl;                 /* MPLS TTL */
      uint8_t pad[3];
  };
  OFP_ASSERT(sizeof(struct ofp11_action_mpls_ttl) == 8);
  
  /* Action structure for OFPAT11_SET_NW_ECN. */
  struct ofp11_action_nw_ecn {
      ovs_be16 type;                    /* OFPAT11_SET_TW_SRC/DST. */
      ovs_be16 len;                     /* Length is 8. */
      uint8_t nw_ecn;                   /* IP ECN (2 bits). */
      uint8_t pad[3];
  };
  OFP_ASSERT(sizeof(struct ofp11_action_nw_ecn) == 8);
  
  /* Action structure for OFPAT11_SET_NW_TTL. */
  struct ofp11_action_nw_ttl {
      ovs_be16 type;                    /* OFPAT11_SET_NW_TTL. */
      ovs_be16 len;                     /* Length is 8. */
      uint8_t nw_ttl;                   /* IP TTL */
      uint8_t pad[3];
  };
  OFP_ASSERT(sizeof(struct ofp11_action_nw_ttl) == 8);
  
  /* Action structure for OFPAT11_PUSH_VLAN/MPLS. */
  struct ofp11_action_push {
      ovs_be16 type;                    /* OFPAT11_PUSH_VLAN/MPLS. */
      ovs_be16 len;                     /* Length is 8. */
      ovs_be16 ethertype;               /* Ethertype */
      uint8_t pad[2];
  };
  OFP_ASSERT(sizeof(struct ofp11_action_push) == 8);
  
  /* Action structure for OFPAT11_POP_MPLS. */
  struct ofp11_action_pop_mpls {
      ovs_be16 type;                    /* OFPAT11_POP_MPLS. */
      ovs_be16 len;                     /* Length is 8. */
      ovs_be16 ethertype;               /* Ethertype */
      uint8_t pad[2];
  };
  OFP_ASSERT(sizeof(struct ofp11_action_pop_mpls) == 8);
  
  /* Configure/Modify behavior of a flow table */
  struct ofp11_table_mod {
      uint8_t table_id;       /* ID of the table, 0xFF indicates all tables */
      uint8_t pad[3];         /* Pad to 32 bits */
      ovs_be32 config;        /* Bitmap of OFPTC_* flags */
  };
  OFP_ASSERT(sizeof(struct ofp11_table_mod) == 8);
  
  /* Flow setup and teardown (controller -> datapath). */
  struct ofp11_flow_mod {
      ovs_be64 cookie;             /* Opaque controller-issued identifier. */
      ovs_be64 cookie_mask;        /* Mask used to restrict the cookie bits
                                      that must match when the command is
                                      OFPFC_MODIFY* or OFPFC_DELETE*. A value
                                      of 0 indicates no restriction. */
      /* Flow actions. */
      uint8_t table_id;            /* ID of the table to put the flow in */
      uint8_t command;             /* One of OFPFC_*. */
      ovs_be16 idle_timeout;       /* Idle time before discarding (seconds). */
      ovs_be16 hard_timeout;       /* Max time before discarding (seconds). */
      ovs_be16 priority;           /* Priority level of flow entry. */
      ovs_be32 buffer_id;          /* Buffered packet to apply to (or -1).
                                      Not meaningful for OFPFC_DELETE*. */
      ovs_be32 out_port;           /* For OFPFC_DELETE* commands, require
                                      matching entries to include this as an
                                      output port. A value of OFPP_ANY
                                      indicates no restriction. */
      ovs_be32 out_group;          /* For OFPFC_DELETE* commands, require
                                      matching entries to include this as an
                                      output group. A value of OFPG11_ANY
                                      indicates no restriction. */
      ovs_be16 flags;              /* One of OFPFF_*. */
      uint8_t pad[2];
      /* Followed by an ofp11_match structure. */
      /* Followed by an instruction set. */
  };
  OFP_ASSERT(sizeof(struct ofp11_flow_mod) == 40);
  
  /* Group types. Values in the range [128, 255] are reserved for experimental
   * use. */
  enum ofp11_group_type {
      OFPGT11_ALL,      /* All (multicast/broadcast) group. */
      OFPGT11_SELECT,   /* Select group. */
      OFPGT11_INDIRECT, /* Indirect group. */
      OFPGT11_FF,        /* Fast failover group. */
      OFPGT11_REORDERING, /* Reordering group */
  };
  
  /* Group numbering. Groups can use any number up to OFPG_MAX. */
  enum ofp11_group {
      /* Last usable group number. */
      OFPG11_MAX        = 0xffffff00,
  
      /* Fake groups. */
      OFPG11_ALL        = 0xfffffffc,  /* Represents all groups for group delete
                                          commands. */
      OFPG11_ANY        = 0xffffffff   /* Wildcard group used only for flow stats
                                          requests. Selects all flows regardless
                                          of group (including flows with no
                                          group). */
  };
  
  /* Bucket for use in groups. */
  struct ofp11_bucket {
      ovs_be16 len;                    /* Length the bucket in bytes, including
                                          this header and any padding to make it
                                          64-bit aligned. */
      ovs_be16 weight;                 /* Relative weight of bucket. Only
                                          defined for select groups. */
      ovs_be32 watch_port;             /* Port whose state affects whether this
                                          bucket is live. Only required for fast
                                          failover groups. */
      ovs_be32 watch_group;            /* Group whose state affects whether this
                                          bucket is live. Only required for fast
                                          failover groups. */
      uint8_t pad[4];
      /* struct ofp_action_header actions[0]; The action length is inferred
                                              from the length field in the
                                              header. */
  };
  OFP_ASSERT(sizeof(struct ofp11_bucket) == 16);
  
  /* Queue configuration for a given port. */
  struct ofp11_queue_get_config_reply {
      ovs_be32 port;
      uint8_t pad[4];
      /* struct ofp_packet_queue queues[0];  List of configured queues. */
  };
  OFP_ASSERT(sizeof(struct ofp11_queue_get_config_reply) == 8);
  
  struct ofp11_stats_msg {
      struct ofp_header header;
      ovs_be16 type;              /* One of the OFPST_* constants. */
      ovs_be16 flags;             /* OFPSF_REQ_* flags (none yet defined). */
      uint8_t pad[4];
      /* Followed by the body of the request. */
  };
  OFP_ASSERT(sizeof(struct ofp11_stats_msg) == 16);
  
  /* Vendor extension stats message. */
  struct ofp11_vendor_stats_msg {
      struct ofp11_stats_msg osm; /* Type OFPST_VENDOR. */
      ovs_be32 vendor;            /* Vendor ID:
                                   * - MSB 0: low-order bytes are IEEE OUI.
                                   * - MSB != 0: defined by OpenFlow
                                   *   consortium. */
      /* Followed by vendor-defined arbitrary additional data. */
  };
  OFP_ASSERT(sizeof(struct ofp11_vendor_stats_msg) == 20);
  
  /* Stats request of type OFPST_FLOW. */
  struct ofp11_flow_stats_request {
      uint8_t table_id;         /* ID of table to read (from ofp_table_stats),
                                   0xff for all tables. */
      uint8_t pad[3];           /* Align to 64 bits. */
      ovs_be32 out_port;        /* Require matching entries to include this
                                   as an output port. A value of OFPP_ANY
                                   indicates no restriction. */
      ovs_be32 out_group;       /* Require matching entries to include this
                                   as an output group. A value of OFPG11_ANY
                                   indicates no restriction. */
      uint8_t pad2[4];          /* Align to 64 bits. */
      ovs_be64 cookie;          /* Require matching entries to contain this
                                   cookie value */
      ovs_be64 cookie_mask;     /* Mask used to restrict the cookie bits that
                                   must match. A value of 0 indicates
                                   no restriction. */
      /* Followed by an ofp11_match structure. */
  };
  OFP_ASSERT(sizeof(struct ofp11_flow_stats_request) == 32);
  
  /* Body of reply to OFPST_FLOW request. */
  struct ofp11_flow_stats {
      ovs_be16 length;           /* Length of this entry. */
      uint8_t table_id;          /* ID of table flow came from. */
      uint8_t pad;
      ovs_be32 duration_sec;     /* Time flow has been alive in seconds. */
      ovs_be32 duration_nsec;    /* Time flow has been alive in nanoseconds beyond
                                    duration_sec. */
      ovs_be16 priority;         /* Priority of the entry. Only meaningful
                                    when this is not an exact-match entry. */
      ovs_be16 idle_timeout;     /* Number of seconds idle before expiration. */
      ovs_be16 hard_timeout;     /* Number of seconds before expiration. */
      ovs_be16 flags;            /* OF 1.3: Set of OFPFF*. */
      uint8_t  pad2[4];          /* Align to 64-bits. */
      ovs_be64 cookie;           /* Opaque controller-issued identifier. */
      ovs_be64 packet_count;     /* Number of packets in flow. */
      ovs_be64 byte_count;       /* Number of bytes in flow. */
      /* Open Flow version specific match */
      /* struct ofp11_instruction instructions[0];  Instruction set. */
  };
  OFP_ASSERT(sizeof(struct ofp11_flow_stats) == 48);
  
  /* Body for ofp_stats_request of type OFPST_AGGREGATE. */
  /* Identical to ofp11_flow_stats_request */
  
  /* Flow match fields. */
  enum ofp11_flow_match_fields {
      OFPFMF11_IN_PORT     = 1 << 0,  /* Switch input port. */
      OFPFMF11_DL_VLAN     = 1 << 1,  /* VLAN id. */
      OFPFMF11_DL_VLAN_PCP = 1 << 2,  /* VLAN priority. */
      OFPFMF11_DL_TYPE     = 1 << 3,  /* Ethernet frame type. */
      OFPFMF11_NW_TOS      = 1 << 4,  /* IP ToS (DSCP field, 6 bits). */
      OFPFMF11_NW_PROTO    = 1 << 5,  /* IP protocol. */
      OFPFMF11_TP_SRC      = 1 << 6,  /* TCP/UDP/SCTP source port. */
      OFPFMF11_TP_DST      = 1 << 7,  /* TCP/UDP/SCTP destination port. */
      OFPFMF11_MPLS_LABEL  = 1 << 8,  /* MPLS label. */
      OFPFMF11_MPLS_TC     = 1 << 9,  /* MPLS TC. */
      OFPFMF11_TYPE        = 1 << 10, /* Match type. */
      OFPFMF11_DL_SRC      = 1 << 11, /* Ethernet source address. */
      OFPFMF11_DL_DST      = 1 << 12, /* Ethernet destination address. */
      OFPFMF11_NW_SRC      = 1 << 13, /* IP source address. */
      OFPFMF11_NW_DST      = 1 << 14, /* IP destination address. */
      OFPFMF11_METADATA    = 1 << 15, /* Metadata passed between tables. */
  };
  
  /* Body of reply to OFPST_TABLE request. */
  struct ofp11_table_stats {
      uint8_t table_id;        /* Identifier of table. Lower numbered tables
                                  are consulted first. */
      uint8_t pad[7];          /* Align to 64-bits. */
      char name[OFP_MAX_TABLE_NAME_LEN];
      ovs_be32 wildcards;      /* Bitmap of OFPFMF_* wildcards that are
                                  supported by the table. */
      ovs_be32 match;          /* Bitmap of OFPFMF_* that indicate the fields
                                  the table can match on. */
      ovs_be32 instructions;   /* Bitmap of OFPIT_* values supported. */
      ovs_be32 write_actions;  /* Bitmap of OFPAT_* that are supported
                                  by the table with OFPIT_WRITE_ACTIONS.  */
      ovs_be32 apply_actions;  /* Bitmap of OFPAT_* that are supported
                                  by the table with OFPIT_APPLY_ACTIONS. */
      ovs_be32 config;         /* Bitmap of OFPTC_* values */
      ovs_be32 max_entries;    /* Max number of entries supported. */
      ovs_be32 active_count;   /* Number of active entries. */
      ovs_be64 lookup_count;   /* Number of packets looked up in table. */
      ovs_be64 matched_count;  /* Number of packets that hit table. */
  };
  OFP_ASSERT(sizeof(struct ofp11_table_stats) == 88);
  
  /* Body for ofp_stats_request of type OFPST_PORT. */
  struct ofp11_port_stats_request {
      ovs_be32 port_no;        /* OFPST_PORT message must request statistics
                                * either for a single port (specified in
                                * port_no) or for all ports (if port_no ==
                                * OFPP_ANY). */
      uint8_t pad[4];
  };
  OFP_ASSERT(sizeof(struct ofp11_port_stats_request) == 8);
  
  /* Body of reply to OFPST_PORT request. If a counter is unsupported, set
   * the field to all ones. */
  struct ofp11_port_stats {
      ovs_be32 port_no;
      uint8_t pad[4];           /* Align to 64-bits. */
      ovs_be64 rx_packets;      /* Number of received packets. */
      ovs_be64 tx_packets;      /* Number of transmitted packets. */
      ovs_be64 rx_bytes;        /* Number of received bytes. */
      ovs_be64 tx_bytes;        /* Number of transmitted bytes. */
      ovs_be64 rx_dropped;      /* Number of packets dropped by RX. */
      ovs_be64 tx_dropped;      /* Number of packets dropped by TX. */
      ovs_be64 rx_errors;       /* Number of receive errors.  This is a
                                   super-set of receive errors and should be
                                   great than or equal to the sum of all
                                   rx_*_err values. */
      ovs_be64 tx_errors;       /* Number of transmit errors.  This is a
                                   super-set of transmit errors. */
      ovs_be64 rx_frame_err;    /* Number of frame alignment errors. */
      ovs_be64 rx_over_err;     /* Number of packets with RX overrun. */
      ovs_be64 rx_crc_err;      /* Number of CRC errors. */
      ovs_be64 collisions;      /* Number of collisions. */
  };
  OFP_ASSERT(sizeof(struct ofp11_port_stats) == 104);
  
  struct ofp11_queue_stats_request {
      ovs_be32 port_no;         /* All ports if OFPP_ANY. */
      ovs_be32 queue_id;        /* All queues if OFPQ_ALL. */
  };
  OFP_ASSERT(sizeof(struct ofp11_queue_stats_request) == 8);
  
  struct ofp11_queue_stats {
      ovs_be32 port_no;
      ovs_be32 queue_id;         /* Queue id. */
      ovs_be64 tx_bytes;         /* Number of transmitted bytes. */
      ovs_be64 tx_packets;       /* Number of transmitted packets. */
      ovs_be64 tx_errors;        /* # of packets dropped due to overrun. */
  };
  OFP_ASSERT(sizeof(struct ofp11_queue_stats) == 32);
  
  struct ofp11_group_stats_request {
      ovs_be32 group_id;         /* All groups if OFPG_ALL. */
      uint8_t pad[4];            /* Align to 64 bits. */
  };
  OFP_ASSERT(sizeof(struct ofp11_group_stats_request) == 8);
  
  /* Used in group stats replies. */
  struct ofp11_bucket_counter {
      ovs_be64 packet_count;   /* Number of packets processed by bucket. */
      ovs_be64 byte_count;     /* Number of bytes processed by bucket. */
  };
  OFP_ASSERT(sizeof(struct ofp11_bucket_counter) == 16);
  
  /* Body of reply to OFPST11_GROUP request */
  struct ofp11_group_stats {
      ovs_be16 length;           /* Length of this entry. */
      uint8_t pad[2];            /* Align to 64 bits. */
      ovs_be32 group_id;         /* Group identifier. */
      ovs_be32 ref_count;        /* Number of flows or groups that
                                    directly forward to this group. */
      uint8_t pad2[4];           /* Align to 64 bits. */
      ovs_be64 packet_count;     /* Number of packets processed by group. */
      ovs_be64 byte_count;       /* Number of bytes processed by group. */
      /* struct ofp11_bucket_counter bucket_stats[]; */
  };
  OFP_ASSERT(sizeof(struct ofp11_group_stats) == 32);
  
  /* Body of reply to OFPST11_GROUP_DESC request. */
  struct ofp11_group_desc_stats {
      ovs_be16 length;            /* Length of this entry. */
      uint8_t type;               /* One of OFPGT11_*. */
      uint8_t pad;                /* Pad to 64 bits. */
      ovs_be32 group_id;          /* Group identifier. */
      /* struct ofp11_bucket buckets[0]; */
  };
  OFP_ASSERT(sizeof(struct ofp11_group_desc_stats) == 8);
  
  /* Send packet (controller -> datapath). */
  struct ofp11_packet_out {
      ovs_be32 buffer_id;       /* ID assigned by datapath (-1 if none). */
      ovs_be32 in_port;         /* Packet's input port or OFPP_CONTROLLER. */
      ovs_be16 actions_len;     /* Size of action array in bytes. */
      uint8_t pad[6];
      /* struct ofp_action_header actions[0];  Action list. */
      /* uint8_t data[0]; */    /* Packet data. The length is inferred
                                   from the length field in the header.
                                   (Only meaningful if buffer_id == -1.) */
  };
  OFP_ASSERT(sizeof(struct ofp11_packet_out) == 16);
  
  /* Packet received on port (datapath -> controller). */
  struct ofp11_packet_in {
      ovs_be32 buffer_id;     /* ID assigned by datapath. */
      ovs_be32 in_port;       /* Port on which frame was received. */
      ovs_be32 in_phy_port;   /* Physical Port on which frame was received. */
      ovs_be16 total_len;     /* Full length of frame. */
      uint8_t reason;         /* Reason packet is being sent (one of OFPR_*) */
      uint8_t table_id;       /* ID of the table that was looked up */
      /* Followed by Ethernet frame. */
  };
  OFP_ASSERT(sizeof(struct ofp11_packet_in) == 16);
  
  /* Flow removed (datapath -> controller). */
  struct ofp11_flow_removed {
      ovs_be64 cookie;          /* Opaque controller-issued identifier. */
  
      ovs_be16 priority;        /* Priority level of flow entry. */
      uint8_t reason;           /* One of OFPRR_*. */
      uint8_t table_id;         /* ID of the table */
  
      ovs_be32 duration_sec;    /* Time flow was alive in seconds. */
      ovs_be32 duration_nsec;   /* Time flow was alive in nanoseconds beyond
                                   duration_sec. */
      ovs_be16 idle_timeout;    /* Idle timeout from original flow mod. */
      uint8_t pad2[2];          /* Align to 64-bits. */
      ovs_be64 packet_count;
      ovs_be64 byte_count;
      /* Followed by an ofp11_match structure. */
  };
  OFP_ASSERT(sizeof(struct ofp11_flow_removed) == 40);
  
  #endif /* openflow/openflow-1.1.h */
  