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ovs/include/openflow/openflow-common.h
Ben Pfaff 994bfc2985 Automatically verify that OVS header files work OK in C++ also. 
This should help address a recurring problem.

This change makes the OVS header files, when parsed by a C++ compiler,
require C++11 or later.

Signed-off-by: Ben Pfaff <blp@ovn.org>
Acked-by: Russell Bryant <russell@ovn.org>
2017-07-31 16:03:38 -07:00

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/* Copyright (c) 2008, 2011, 2012, 2013, 2014, 2016 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) 2008-2015 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.
*/
#ifndef OPENFLOW_COMMON_H
#define OPENFLOW_COMMON_H 1
#include <openvswitch/types.h>
#ifdef SWIG
#define OFP_ASSERT(EXPR) /* SWIG can't handle OFP_ASSERT. */
#elif !defined(__cplusplus)
/* Build-time assertion for use in a declaration context. */
#define OFP_ASSERT(EXPR) \
extern int (*build_assert(void))[ sizeof(struct { \
unsigned int build_assert_failed : (EXPR) ? 1 : -1; })]
#else /* __cplusplus */
#define OFP_ASSERT(EXPR) static_assert(EXPR, "assertion failed")
#endif /* __cplusplus */
/* Version number:
* Non-experimental versions released: 0x01 0x02
* Experimental versions released: 0x81 -- 0x99
*/
/* The most significant bit being set in the version field indicates an
* experimental OpenFlow version.
*/
enum ofp_version {
OFP10_VERSION = 0x01,
OFP11_VERSION = 0x02,
OFP12_VERSION = 0x03,
OFP13_VERSION = 0x04,
OFP14_VERSION = 0x05,
OFP15_VERSION = 0x06,
OFP16_VERSION = 0x07
};
/* Vendor (aka experimenter) IDs.
*
* These are used in various places in OpenFlow to identify an extension
* defined by some vendor, as opposed to a standardized part of the core
* OpenFlow protocol.
*
* Vendor IDs whose top 8 bits are 0 hold an Ethernet OUI in their low 24 bits.
* The Open Networking Foundation assigns vendor IDs whose top 8 bits are
* nonzero.
*
* A few vendor IDs are special:
*
* - OF_VENDOR_ID is not a real vendor ID and does not appear in the
* OpenFlow protocol itself. It can occasionally be useful within Open
* vSwitch to identify a standardized part of OpenFlow.
*
* - ONF_VENDOR_ID is being used within the ONF "extensibility" working
* group to identify extensions being proposed for standardization.
*
* The list is sorted numerically.
*/
#define OF_VENDOR_ID 0
#define HPL_VENDOR_ID 0x000004EA /* HP Labs. */
#define NTR_VENDOR_ID 0x0000154d /* Netronome. */
#define NTR_COMPAT_VENDOR_ID 0x00001540 /* Incorrect value used in v2.4. */
#define NX_VENDOR_ID 0x00002320 /* Nicira. */
#define ONF_VENDOR_ID 0x4f4e4600 /* Open Networking Foundation. */
#define INTEL_VENDOR_ID 0x0000AA01 /* Intel */
#define OFP_MAX_TABLE_NAME_LEN 32
#define OFP_OLD_PORT 6633
#define OFP_PORT 6653
#define OFP_DEFAULT_MISS_SEND_LEN 128
/* Values below this cutoff are 802.3 packets and the two bytes
* following MAC addresses are used as a frame length. Otherwise, the
* two bytes are used as the Ethernet type.
*/
#define OFP_DL_TYPE_ETH2_CUTOFF 0x0600
/* Value of dl_type to indicate that the frame does not include an
* Ethernet type.
*/
#define OFP_DL_TYPE_NOT_ETH_TYPE 0x05ff
/* Value used in "idle_timeout" and "hard_timeout" to indicate that the entry
* is permanent. */
#define OFP_FLOW_PERMANENT 0
/* By default, choose a priority in the middle. */
#define OFP_DEFAULT_PRIORITY 0x8000
/* Header on all OpenFlow packets. */
struct ofp_header {
uint8_t version; /* An OpenFlow version number, e.g. OFP10_VERSION. */
uint8_t type; /* One of the OFPT_ constants. */
ovs_be16 length; /* Length including this ofp_header. */
ovs_be32 xid; /* Transaction id associated with this packet.
Replies use the same id as was in the request
to facilitate pairing. */
};
OFP_ASSERT(sizeof(struct ofp_header) == 8);
/* OFPT_ERROR: Error message (datapath -> controller). */
struct ofp_error_msg {
ovs_be16 type;
ovs_be16 code;
uint8_t data[0]; /* Variable-length data. Interpreted based
on the type and code. */
};
OFP_ASSERT(sizeof(struct ofp_error_msg) == 4);
enum ofp_config_flags {
/* Handling of IP fragments. */
OFPC_FRAG_NORMAL = 0, /* No special handling for fragments. */
OFPC_FRAG_DROP = 1, /* Drop fragments. */
OFPC_FRAG_REASM = 2, /* Reassemble (only if OFPC_IP_REASM set). */
OFPC_FRAG_NX_MATCH = 3, /* Make first fragments available for matching. */
OFPC_FRAG_MASK = 3,
/* OFPC_INVALID_TTL_TO_CONTROLLER is deprecated in OpenFlow 1.3 */
/* TTL processing - applicable for IP and MPLS packets. */
OFPC_INVALID_TTL_TO_CONTROLLER = 1 << 2, /* Send packets with invalid TTL
to the controller. */
};
/* Switch configuration. */
struct ofp_switch_config {
ovs_be16 flags; /* OFPC_* flags. */
ovs_be16 miss_send_len; /* Max bytes of new flow that datapath should
send to the controller. */
};
OFP_ASSERT(sizeof(struct ofp_switch_config) == 4);
/* Common flags to indicate behavior of the physical port. These flags are
* used in ofp_port to describe the current configuration. They are used in
* the ofp_port_mod message to configure the port's behavior.
*/
enum ofp_port_config {
OFPPC_PORT_DOWN = 1 << 0, /* Port is administratively down. */
OFPPC_NO_RECV = 1 << 2, /* Drop all packets received by port. */
OFPPC_NO_FWD = 1 << 5, /* Drop packets forwarded to port. */
OFPPC_NO_PACKET_IN = 1 << 6 /* Do not send packet-in msgs for port. */
};
/* Common current state of the physical port. These are not configurable from
* the controller.
*/
enum ofp_port_state {
OFPPS_LINK_DOWN = 1 << 0, /* No physical link present. */
};
/* Common features of physical ports available in a datapath. */
enum ofp_port_features {
OFPPF_10MB_HD = 1 << 0, /* 10 Mb half-duplex rate support. */
OFPPF_10MB_FD = 1 << 1, /* 10 Mb full-duplex rate support. */
OFPPF_100MB_HD = 1 << 2, /* 100 Mb half-duplex rate support. */
OFPPF_100MB_FD = 1 << 3, /* 100 Mb full-duplex rate support. */
OFPPF_1GB_HD = 1 << 4, /* 1 Gb half-duplex rate support. */
OFPPF_1GB_FD = 1 << 5, /* 1 Gb full-duplex rate support. */
OFPPF_10GB_FD = 1 << 6, /* 10 Gb full-duplex rate support. */
};
/* Generic OpenFlow property header, as used by various messages in OF1.3+, and
* especially in OF1.4.
*
* The OpenFlow specs prefer to define a new structure with a specialized name
* each time this property structure comes up: struct
* ofp_port_desc_prop_header, struct ofp_controller_status_prop_header, struct
* ofp_table_mod_prop_header, and more. They're all the same, so it's easier
* to unify them.
*/
struct ofp_prop_header {
ovs_be16 type;
ovs_be16 len;
/* Followed by:
* - 'len - 4' bytes of payload.
* - PAD_SIZE(len, 8) bytes of zeros. */
};
OFP_ASSERT(sizeof(struct ofp_prop_header) == 4);
/* Generic OpenFlow experimenter property header.
*
* Again the OpenFlow specs define this over and over again and it's easier to
* unify them. */
struct ofp_prop_experimenter {
ovs_be16 type; /* Generally 0xffff (in one case 0xfffe). */
ovs_be16 len; /* Length in bytes of this property. */
ovs_be32 experimenter; /* Experimenter ID which takes the same form as
* in struct ofp_experimenter_header. */
ovs_be32 exp_type; /* Experimenter defined. */
/* Followed by:
* - 'len - 12' bytes of payload.
* - PAD_SIZE(len, 8) bytes of zeros. */
};
OFP_ASSERT(sizeof(struct ofp_prop_experimenter) == 12);
/* Switch features. */
struct ofp_switch_features {
ovs_be64 datapath_id; /* Datapath unique ID. The lower 48-bits are for
a MAC address, while the upper 16-bits are
implementer-defined. */
ovs_be32 n_buffers; /* Max packets buffered at once. */
uint8_t n_tables; /* Number of tables supported by datapath. */
uint8_t auxiliary_id; /* OF 1.3: Identify auxiliary connections */
uint8_t pad[2]; /* Align to 64-bits. */
/* Features. */
ovs_be32 capabilities; /* OFPC_*, OFPC10_*, OFPC11_*, OFPC12_*. */
ovs_be32 actions; /* Bitmap of supported "ofp_action_type"s.
* DEPRECATED in OpenFlow 1.1 */
/* Followed by an array of struct ofp10_phy_port or struct ofp11_port
* structures. The number is inferred from header.length.
* REMOVED in OpenFlow 1.3 */
};
OFP_ASSERT(sizeof(struct ofp_switch_features) == 24);
/* Common capabilities supported by the datapath (struct ofp_switch_features,
* member capabilities). */
enum ofp_capabilities {
OFPC_FLOW_STATS = 1 << 0, /* Flow statistics. */
OFPC_TABLE_STATS = 1 << 1, /* Table statistics. */
OFPC_PORT_STATS = 1 << 2, /* Port statistics. */
OFPC_IP_REASM = 1 << 5, /* Can reassemble IP fragments. */
OFPC_QUEUE_STATS = 1 << 6, /* Queue statistics. */
OFPC_ARP_MATCH_IP = 1 << 7 /* Match IP addresses in ARP
pkts. */
};
/* Why is this packet being sent to the controller? */
enum ofp_packet_in_reason {
/* Standard reasons. */
OFPR_NO_MATCH, /* No matching flow. */
OFPR_ACTION, /* Action explicitly output to controller. */
OFPR_INVALID_TTL, /* Packet has invalid TTL. */
OFPR_ACTION_SET, /* Output to controller in action set */
OFPR_GROUP, /* Output to controller in group bucket */
OFPR_PACKET_OUT, /* Output to controller in packet-out */
#define OFPR10_BITS \
((1u << OFPR_NO_MATCH) | (1u << OFPR_ACTION) | (1u << OFPR_INVALID_TTL))
/* From OF1.4+, OFPR_ACTION is split into four more descriptive reasons,
* OFPR_APPLY_ACTION, OFPR_ACTION_SET, OFPR_GROUP, and OFPR_PACKET_OUT.
* OFPR_APPLY_ACTION shares the same number as OFPR_ACTION. */
#define OFPR14_ACTION_BITS \
((1u << OFPR_ACTION_SET) | (1u << OFPR_GROUP) | (1u << OFPR_PACKET_OUT))
#define OFPR14_BITS \
(OFPR10_BITS | OFPR14_ACTION_BITS)
/* Nonstandard reason--not exposed via OpenFlow. */
OFPR_EXPLICIT_MISS,
OFPR_IMPLICIT_MISS,
OFPR_N_REASONS
};
enum ofp_flow_mod_command {
OFPFC_ADD, /* New flow. */
OFPFC_MODIFY, /* Modify all matching flows. */
OFPFC_MODIFY_STRICT, /* Modify entry strictly matching wildcards */
OFPFC_DELETE, /* Delete all matching flows. */
OFPFC_DELETE_STRICT /* Strictly match wildcards and priority. */
};
enum ofp_flow_mod_flags {
OFPFF_SEND_FLOW_REM = 1 << 0, /* Send flow removed message when flow
* expires or is deleted. */
OFPFF_CHECK_OVERLAP = 1 << 1, /* Check for overlapping entries first. */
};
/* Why was this flow removed? */
enum ofp_flow_removed_reason {
OFPRR_IDLE_TIMEOUT, /* Flow idle time exceeded idle_timeout. */
OFPRR_HARD_TIMEOUT, /* Time exceeded hard_timeout. */
OFPRR_DELETE, /* Evicted by a DELETE flow mod. */
OFPRR_GROUP_DELETE, /* Group was removed. */
OFPRR_METER_DELETE, /* Meter was removed. */
OFPRR_EVICTION, /* Switch eviction to free resources. */
#define OFPRR10_BITS \
((1u << OFPRR_IDLE_TIMEOUT) | \
(1u << OFPRR_HARD_TIMEOUT) | \
(1u << OFPRR_DELETE))
#define OFPRR13_BITS \
(OFPRR10_BITS | \
(1u << OFPRR_GROUP_DELETE))
#define OFPRR14_BITS \
(OFPRR13_BITS | \
(1u << OFPRR_METER_DELETE) | \
(1u << OFPRR_EVICTION))
OVS_OFPRR_NONE /* OVS internal_use only, keep last!. */
};
/* What changed about the physical port */
enum ofp_port_reason {
OFPPR_ADD, /* The port was added. */
OFPPR_DELETE, /* The port was removed. */
OFPPR_MODIFY, /* Some attribute of the port has changed. */
#define OFPPR_BITS ((1u << OFPPR_ADD) | \
(1u << OFPPR_DELETE) | \
(1u << OFPPR_MODIFY))
OFPPR_N_REASONS /* Denotes number of reasons. */
};
/* A physical port has changed in the datapath */
struct ofp_port_status {
uint8_t reason; /* One of OFPPR_*. */
uint8_t pad[7]; /* Align to 64-bits. */
/* Followed by struct ofp10_phy_port, struct ofp11_port, or struct
* ofp14_port. */
};
OFP_ASSERT(sizeof(struct ofp_port_status) == 8);
enum ofp_stats_reply_flags {
OFPSF_REPLY_MORE = 1 << 0 /* More replies to follow. */
};
#define DESC_STR_LEN 256
#define SERIAL_NUM_LEN 32
/* Body of reply to OFPST_DESC request. Each entry is a NULL-terminated ASCII
* string. */
struct ofp_desc_stats {
char mfr_desc[DESC_STR_LEN]; /* Manufacturer description. */
char hw_desc[DESC_STR_LEN]; /* Hardware description. */
char sw_desc[DESC_STR_LEN]; /* Software description. */
char serial_num[SERIAL_NUM_LEN]; /* Serial number. */
char dp_desc[DESC_STR_LEN]; /* Human readable description of
the datapath. */
};
OFP_ASSERT(sizeof(struct ofp_desc_stats) == 1056);
/* Reply to OFPST_AGGREGATE request. */
struct ofp_aggregate_stats_reply {
ovs_32aligned_be64 packet_count; /* Number of packets in flows. */
ovs_32aligned_be64 byte_count; /* Number of bytes in flows. */
ovs_be32 flow_count; /* Number of flows. */
uint8_t pad[4]; /* Align to 64 bits. */
};
OFP_ASSERT(sizeof(struct ofp_aggregate_stats_reply) == 24);
/* The match type indicates the match structure (set of fields that compose the
* match) in use. The match type is placed in the type field at the beginning
* of all match structures. The "OpenFlow Extensible Match" type corresponds
* to OXM TLV format described below and must be supported by all OpenFlow
* switches. Extensions that define other match types may be published on the
* ONF wiki. Support for extensions is optional.
*/
enum ofp_match_type {
OFPMT_STANDARD = 0, /* The match fields defined in the ofp11_match
structure apply */
OFPMT_OXM = 1, /* OpenFlow Extensible Match */
};
/* Group numbering. Groups can use any number up to OFPG_MAX. */
enum ofp_group {
/* Last usable group number. */
OFPG_MAX = 0xffffff00,
/* Fake groups. */
OFPG_ALL = 0xfffffffc, /* All groups, for group delete commands. */
OFPG_ANY = 0xffffffff /* Wildcard, for flow stats requests. */
};
/* Group configuration flags */
enum ofp_group_capabilities {
OFPGFC_SELECT_WEIGHT = 1 << 0, /* Support weight for select groups */
OFPGFC_SELECT_LIVENESS = 1 << 1, /* Support liveness for select groups */
OFPGFC_CHAINING = 1 << 2, /* Support chaining groups */
OFPGFC_CHAINING_CHECKS = 1 << 3, /* Check chaining for loops and delete */
};
enum ofp_hello_elem_type {
OFPHET_VERSIONBITMAP = 1, /* Bitmap of version supported. */
};
/* Common header for all Hello Elements */
struct ofp_hello_elem_header {
ovs_be16 type; /* One of OFPHET_*. */
ovs_be16 length; /* Length in bytes of this element. */
};
OFP_ASSERT(sizeof(struct ofp_hello_elem_header) == 4);
/* Table numbering. Tables can use any number up to OFPT_MAX. */
enum ofp_table {
/* Last usable table number. */
OFPTT_MAX = 0xfe,
/* Fake tables. */
OFPTT_ALL = 0xff /* Wildcard table used for table config,
flow stats and flow deletes. */
};
enum ofp_table_config {
/* OpenFlow 1.1 and 1.2 defined this field as shown.
* OpenFlow 1.3 and later mark this field as deprecated, but have not
* reused it for any new purpose. */
OFPTC11_TABLE_MISS_CONTROLLER = 0 << 0, /* Send to controller. */
OFPTC11_TABLE_MISS_CONTINUE = 1 << 0, /* Go to next table, like OF1.0. */
OFPTC11_TABLE_MISS_DROP = 2 << 0, /* Drop the packet. */
OFPTC11_TABLE_MISS_MASK = 3 << 0,
/* OpenFlow 1.4. */
OFPTC14_EVICTION = 1 << 2, /* Allow table to evict flows. */
OFPTC14_VACANCY_EVENTS = 1 << 3, /* Enable vacancy events. */
};
/* Header and packet type name spaces. */
enum ofp_header_type_namespaces {
OFPHTN_ONF = 0, /* ONF namespace. */
OFPHTN_ETHERTYPE = 1, /* ns_type is an Ethertype. */
OFPHTN_IP_PROTO = 2, /* ns_type is a IP protocol number. */
OFPHTN_UDP_TCP_PORT = 3, /* ns_type is a TCP or UDP port. */
OFPHTN_IPV4_OPTION = 4, /* ns_type is an IPv4 option number. */
};
#endif /* openflow/openflow-common.h */
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