include/openflow/openflow-common.h

   1 /* Copyright (c) 2008, 2011 The Board of Trustees of The Leland Stanford
   2  * Junior University
   3  *
   4  * We are making the OpenFlow specification and associated documentation
   5  * (Software) available for public use and benefit with the expectation
   6  * that others will use, modify and enhance the Software and contribute
   7  * those enhancements back to the community. However, since we would
   8  * like to make the Software available for broadest use, with as few
   9  * restrictions as possible permission is hereby granted, free of
  10  * charge, to any person obtaining a copy of this Software to deal in
  11  * the Software under the copyrights without restriction, including
  12  * without limitation the rights to use, copy, modify, merge, publish,
  13  * distribute, sublicense, and/or sell copies of the Software, and to
  14  * permit persons to whom the Software is furnished to do so, subject to
  15  * the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be
  18  * included in all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23  * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  24  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  25  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  26  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  27  * SOFTWARE.
  28  *
  29  * The name and trademarks of copyright holder(s) may NOT be used in
  30  * advertising or publicity pertaining to the Software or any
  31  * derivatives without specific, written prior permission.
  32  */
  33
  34 /*
  35  * Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks.
  36  *
  37  * Licensed under the Apache License, Version 2.0 (the "License");
  38  * you may not use this file except in compliance with the License.
  39  * You may obtain a copy of the License at:
  40  *
  41  *     http://www.apache.org/licenses/LICENSE-2.0
  42  *
  43  * Unless required by applicable law or agreed to in writing, software
  44  * distributed under the License is distributed on an "AS IS" BASIS,
  45  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  46  * See the License for the specific language governing permissions and
  47  * limitations under the License.
  48  */
  49
  50 #ifndef OPENFLOW_COMMON_H
  51 #define OPENFLOW_COMMON_H 1
  52
  53 #include "openvswitch/types.h"
  54
  55 #ifdef SWIG
  56 #define OFP_ASSERT(EXPR)        /* SWIG can't handle OFP_ASSERT. */
  57 #elif !defined(__cplusplus)
  58 /* Build-time assertion for use in a declaration context. */
  59 #define OFP_ASSERT(EXPR)                                                \
  60         extern int (*build_assert(void))[ sizeof(struct {               \
  61                     unsigned int build_assert_failed : (EXPR) ? 1 : -1; })]
  62 #else /* __cplusplus */
  63 #include <boost/static_assert.hpp>
  64 #define OFP_ASSERT BOOST_STATIC_ASSERT
  65 #endif /* __cplusplus */
  66
  67 /* Version number:
  68  * Non-experimental versions released: 0x01 0x02
  69  * Experimental versions released: 0x81 -- 0x99
  70  */
  71 /* The most significant bit being set in the version field indicates an
  72  * experimental OpenFlow version.
  73  */
  74 #define OFP10_VERSION   0x01
  75 #define OFP11_VERSION   0x02
  76
  77 #define OFP_MAX_TABLE_NAME_LEN 32
  78 #define OFP_MAX_PORT_NAME_LEN  16
  79
  80 #define OFP_TCP_PORT  6633
  81 #define OFP_SSL_PORT  6633
  82
  83 #define OFP_ETH_ALEN 6          /* Bytes in an Ethernet address. */
  84
  85 /* Common OpenFlow message types. */
  86 enum ofp_type {
  87     /* Immutable messages. */
  88     OFPT_HELLO,               /* Symmetric message */
  89     OFPT_ERROR,               /* Symmetric message */
  90     OFPT_ECHO_REQUEST,        /* Symmetric message */
  91     OFPT_ECHO_REPLY,          /* Symmetric message */
  92     OFPT_VENDOR,              /* Symmetric message */
  93
  94     /* Switch configuration messages. */
  95     OFPT_FEATURES_REQUEST,    /* Controller/switch message */
  96     OFPT_FEATURES_REPLY,      /* Controller/switch message */
  97     OFPT_GET_CONFIG_REQUEST,  /* Controller/switch message */
  98     OFPT_GET_CONFIG_REPLY,    /* Controller/switch message */
  99     OFPT_SET_CONFIG,          /* Controller/switch message */
 100
 101     /* Asynchronous messages. */
 102     OFPT_PACKET_IN,           /* Async message */
 103     OFPT_FLOW_REMOVED,        /* Async message */
 104     OFPT_PORT_STATUS,         /* Async message */
 105 };
 106
 107 /* Header on all OpenFlow packets. */
 108 struct ofp_header {
 109     uint8_t version;    /* An OpenFlow version number, e.g. OFP10_VERSION. */
 110     uint8_t type;       /* One of the OFPT_ constants. */
 111     ovs_be16 length;    /* Length including this ofp_header. */
 112     ovs_be32 xid;       /* Transaction id associated with this packet.
 113                            Replies use the same id as was in the request
 114                            to facilitate pairing. */
 115 };
 116 OFP_ASSERT(sizeof(struct ofp_header) == 8);
 117
 118 /* Common flags to indicate behavior of the physical port.  These flags are
 119  * used in ofp_port to describe the current configuration.  They are used in
 120  * the ofp_port_mod message to configure the port's behavior.
 121  */
 122 enum ofp_port_config {
 123     OFPPC_PORT_DOWN    = 1 << 0,  /* Port is administratively down. */
 124
 125     OFPPC_NO_RECV      = 1 << 2,  /* Drop all packets received by port. */
 126     OFPPC_NO_FWD       = 1 << 5,  /* Drop packets forwarded to port. */
 127     OFPPC_NO_PACKET_IN = 1 << 6   /* Do not send packet-in msgs for port. */
 128 };
 129
 130 /* Common current state of the physical port.  These are not configurable from
 131  * the controller.
 132  */
 133 enum ofp_port_state {
 134     OFPPS_LINK_DOWN    = 1 << 0,  /* No physical link present. */
 135 };
 136
 137 /* Common features of physical ports available in a datapath. */
 138 enum ofp_port_features {
 139     OFPPF_10MB_HD    = 1 << 0,  /* 10 Mb half-duplex rate support. */
 140     OFPPF_10MB_FD    = 1 << 1,  /* 10 Mb full-duplex rate support. */
 141     OFPPF_100MB_HD   = 1 << 2,  /* 100 Mb half-duplex rate support. */
 142     OFPPF_100MB_FD   = 1 << 3,  /* 100 Mb full-duplex rate support. */
 143     OFPPF_1GB_HD     = 1 << 4,  /* 1 Gb half-duplex rate support. */
 144     OFPPF_1GB_FD     = 1 << 5,  /* 1 Gb full-duplex rate support. */
 145     OFPPF_10GB_FD    = 1 << 6,  /* 10 Gb full-duplex rate support. */
 146 };
 147
 148 /* Switch features. */
 149 struct ofp_switch_features {
 150     struct ofp_header header;
 151     ovs_be64 datapath_id;   /* Datapath unique ID.  The lower 48-bits are for
 152                                a MAC address, while the upper 16-bits are
 153                                implementer-defined. */
 154
 155     ovs_be32 n_buffers;     /* Max packets buffered at once. */
 156
 157     uint8_t n_tables;       /* Number of tables supported by datapath. */
 158     uint8_t pad[3];         /* Align to 64-bits. */
 159
 160     /* Features. */
 161     ovs_be32 capabilities;  /* OFPC_*, OFPC10_*, OFPC11_*. */
 162     ovs_be32 actions;       /* Bitmap of supported "ofp_action_type"s. */
 163
 164     /* Followed by an array of struct ofp10_phy_port or struct ofp11_port
 165      * structures.  The number is inferred from header.length. */
 166 };
 167 OFP_ASSERT(sizeof(struct ofp_switch_features) == 32);
 168
 169 /* Common capabilities supported by the datapath (struct ofp_switch_features,
 170  * member capabilities). */
 171 enum ofp_capabilities {
 172     OFPC_FLOW_STATS     = 1 << 0,  /* Flow statistics. */
 173     OFPC_TABLE_STATS    = 1 << 1,  /* Table statistics. */
 174     OFPC_PORT_STATS     = 1 << 2,  /* Port statistics. */
 175     OFPC_IP_REASM       = 1 << 5,  /* Can reassemble IP fragments. */
 176     OFPC_QUEUE_STATS    = 1 << 6,  /* Queue statistics. */
 177     OFPC_ARP_MATCH_IP   = 1 << 7   /* Match IP addresses in ARP
 178                                       pkts. */
 179 };
 180
 181 /* What changed about the physical port */
 182 enum ofp_port_reason {
 183     OFPPR_ADD,              /* The port was added. */
 184     OFPPR_DELETE,           /* The port was removed. */
 185     OFPPR_MODIFY            /* Some attribute of the port has changed. */
 186 };
 187
 188 /* A physical port has changed in the datapath */
 189 struct ofp_port_status {
 190     struct ofp_header header;
 191     uint8_t reason;          /* One of OFPPR_*. */
 192     uint8_t pad[7];          /* Align to 64-bits. */
 193     /* Followed by struct ofp10_phy_port or struct ofp11_port.  */
 194 };
 195 OFP_ASSERT(sizeof(struct ofp_port_status) == 16);
 196
 197 #endif /* openflow/openflow-common.h */