Move lib/ofp-msgs.h to include/openvswitch directory

Signed-off-by: Ben Warren <ben@skyportsystems.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>

1 files changed, 752 insertions, 0 deletions

diff --git a/include/openvswitch/ofp-msgs.h b/include/openvswitch/ofp-msgs.h
new file mode 100644
index 000000000..560cbe0c3
--- /dev/null
+++ b/include/openvswitch/ofp-msgs.h
@@ -0,0 +1,752 @@
+/*
+ * Copyright (c) 2012, 2013, 2014, 2015, 2016 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 OPENVSWITCH_OFP_MSGS_H
+#define OPENVSWITCH_OFP_MSGS_H 1
+
+/* OpenFlow message headers abstraction.
+ *
+ * OpenFlow headers are unnecessarily complicated:
+ *
+ *   - Some messages with the same meaning were renumbered between 1.0 and 1.1.
+ *
+ *   - "Statistics" (aka multipart) messages have a different format from other
+ *     messages.
+ *
+ *   - The 1.0 header for statistics messages is an odd number of 32-bit words
+ *     long, leaving 64-bit quantities in the body misaligned.  The 1.1 header
+ *     for statistics added a padding word to fix this misalignment, although
+ *     many statistic message bodies did not change.
+ *
+ *   - Vendor-defined messages have an additional header but no standard way to
+ *     distinguish individual types of message within a given vendor.
+ *
+ * This file attempts to abstract out the differences between the various forms
+ * of headers.
+ */
+
+#include "openvswitch/ofp-errors.h"
+#include "openvswitch/types.h"
+#include "util.h"
+
+struct ovs_list;
+
+/* Raw identifiers for OpenFlow messages.
+ *
+ * Some OpenFlow messages with similar meanings have multiple variants across
+ * OpenFlow versions or vendor extensions.  Each variant has a different
+ * OFPRAW_* enumeration constant.  More specifically, if two messages have
+ * different types, different numbers, or different arguments, then they must
+ * have different OFPRAW_* values.
+ *
+ * The comments here must follow a stylized form because the "extract-ofp-msgs"
+ * program parses them at build time to generate data tables.  The syntax of
+ * each comment is:
+ *
+ *    type versions (number): arguments.
+ *
+ * where the syntax of each part is:
+ *
+ *    - type: One of the following:
+ *
+ *          * OFPT: standard OpenFlow message.
+ *          * OFPST: standard OpenFlow statistics or multipart message.
+ *          * NXT: Nicira extension message.
+ *          * NXST: Nicira extension statistics or multipart message.
+ *          * ONFT: Open Networking Foundation extension message.
+ *          * ONFST: Open Networking Foundation multipart message.
+ *
+ *      As new vendors implement extensions it will make sense to expand the
+ *      dictionary of possible types.
+ *
+ *    - versions: The OpenFlow version or versions in which this message is
+ *      supported, e.g. "1.0" or "1.1" or "1.0+".
+ *
+ *    - number:
+ *         For OFPT, the 'type' in struct ofp_header.
+ *         For OFPST, the 'type' in struct ofp_stats_msg or ofp11_stats_msg.
+ *         For NXT or ONFT, the 'subtype' in struct ofp_vendor_header.
+ *         For NXST or ONFST, the 'subtype' in an appropriate vendor stats
+ *         struct.
+ *
+ *    - arguments: The types of data that follow the OpenFlow headers (the
+ *      message "body").  This can be "void" if the message has no body.
+ *      Otherwise, it should be a comma-separated sequence of C types.  The
+ *      last type in the sequence can end with [] if the body ends in a
+ *      variable-length sequence.
+ *
+ *      The arguments are used to validate the lengths of messages when a
+ *      header is parsed.  Any message whose length isn't valid as a length of
+ *      the specified types will be rejected with OFPERR_OFPBRC_BAD_LEN.
+ *
+ *      A few OpenFlow messages, such as OFPT_PACKET_IN, intentionally end with
+ *      only part of a structure, up to some specified member.  The syntax "up
+ *      to <member>" indicates this, e.g. "struct ofp11_packet_in up to data".
+ */
+enum ofpraw {
+/* Immutable standard messages.
+ *
+ * The OpenFlow standard promises to preserve these messages and their numbers
+ * in future versions, so we mark them as <all>, which covers every OpenFlow
+ * version numbered 0x01...0xff, rather than as OF1.0+, which covers only
+ * OpenFlow versions that we otherwise implement.
+ *
+ * Without <all> here, then we would fail to decode "hello" messages that
+ * announce a version higher than we understand, even though there still could
+ * be a version in common with the peer that we do understand.  The <all>
+ * keyword is less useful for the other messages, because our OpenFlow channels
+ * accept only OpenFlow messages with a previously negotiated version.
+ */
+
+    /* OFPT <all> (0): uint8_t[]. */
+    OFPRAW_OFPT_HELLO,
+
+    /* OFPT <all> (1): struct ofp_error_msg, uint8_t[]. */
+    OFPRAW_OFPT_ERROR,
+
+    /* OFPT <all> (2): uint8_t[]. */
+    OFPRAW_OFPT_ECHO_REQUEST,
+
+    /* OFPT <all> (3): uint8_t[]. */
+    OFPRAW_OFPT_ECHO_REPLY,
+
+/* Other standard messages.
+ *
+ * The meanings of these messages can (and often do) change from one version
+ * of OpenFlow to another. */
+
+    /* OFPT 1.0+ (5): void. */
+    OFPRAW_OFPT_FEATURES_REQUEST,
+
+    /* OFPT 1.0 (6): struct ofp_switch_features, struct ofp10_phy_port[]. */
+    OFPRAW_OFPT10_FEATURES_REPLY,
+    /* OFPT 1.1-1.2 (6): struct ofp_switch_features, struct ofp11_port[]. */
+    OFPRAW_OFPT11_FEATURES_REPLY,
+    /* OFPT 1.3+ (6): struct ofp_switch_features. */
+    OFPRAW_OFPT13_FEATURES_REPLY,
+
+    /* OFPT 1.0+ (7): void. */
+    OFPRAW_OFPT_GET_CONFIG_REQUEST,
+
+    /* OFPT 1.0+ (8): struct ofp_switch_config. */
+    OFPRAW_OFPT_GET_CONFIG_REPLY,
+
+    /* OFPT 1.0+ (9): struct ofp_switch_config. */
+    OFPRAW_OFPT_SET_CONFIG,
+
+    /* OFPT 1.0 (10): struct ofp10_packet_in up to data, uint8_t[]. */
+    OFPRAW_OFPT10_PACKET_IN,
+    /* OFPT 1.1 (10): struct ofp11_packet_in, uint8_t[]. */
+    OFPRAW_OFPT11_PACKET_IN,
+    /* OFPT 1.2 (10): struct ofp12_packet_in, uint8_t[]. */
+    OFPRAW_OFPT12_PACKET_IN,
+    /* OFPT 1.3+ (10): struct ofp12_packet_in, ovs_be64, uint8_t[]. */
+    OFPRAW_OFPT13_PACKET_IN,
+    /* NXT 1.0+ (17): struct nx_packet_in, uint8_t[]. */
+    OFPRAW_NXT_PACKET_IN,
+    /* NXT 1.0+ (30): uint8_t[8][]. */
+    OFPRAW_NXT_PACKET_IN2,
+
+    /* OFPT 1.0 (11): struct ofp10_flow_removed. */
+    OFPRAW_OFPT10_FLOW_REMOVED,
+    /* OFPT 1.1+ (11): struct ofp11_flow_removed, uint8_t[8][]. */
+    OFPRAW_OFPT11_FLOW_REMOVED,
+    /* NXT 1.0+ (14): struct nx_flow_removed, uint8_t[8][]. */
+    OFPRAW_NXT_FLOW_REMOVED,
+
+    /* OFPT 1.0 (12): struct ofp_port_status, struct ofp10_phy_port. */
+    OFPRAW_OFPT10_PORT_STATUS,
+    /* OFPT 1.1-1.3 (12): struct ofp_port_status, struct ofp11_port. */
+    OFPRAW_OFPT11_PORT_STATUS,
+    /* OFPT 1.4+ (12): struct ofp_port_status, struct ofp14_port, uint8_t[8][]. */
+    OFPRAW_OFPT14_PORT_STATUS,
+
+    /* OFPT 1.0 (13): struct ofp10_packet_out, uint8_t[]. */
+    OFPRAW_OFPT10_PACKET_OUT,
+    /* OFPT 1.1+ (13): struct ofp11_packet_out, uint8_t[]. */
+    OFPRAW_OFPT11_PACKET_OUT,
+
+    /* OFPT 1.0 (14): struct ofp10_flow_mod, uint8_t[8][]. */
+    OFPRAW_OFPT10_FLOW_MOD,
+    /* OFPT 1.1+ (14): struct ofp11_flow_mod, struct ofp11_instruction[]. */
+    OFPRAW_OFPT11_FLOW_MOD,
+    /* NXT 1.0+ (13): struct nx_flow_mod, uint8_t[8][]. */
+    OFPRAW_NXT_FLOW_MOD,
+
+    /* OFPT 1.1-1.4 (15): struct ofp11_group_mod, uint8_t[8][]. */
+    OFPRAW_OFPT11_GROUP_MOD,
+    /* OFPT 1.5+ (15): struct ofp15_group_mod, uint8_t[8][]. */
+    OFPRAW_OFPT15_GROUP_MOD,
+
+    /* OFPT 1.0 (15): struct ofp10_port_mod. */
+    OFPRAW_OFPT10_PORT_MOD,
+    /* OFPT 1.1-1.3 (16): struct ofp11_port_mod. */
+    OFPRAW_OFPT11_PORT_MOD,
+    /* OFPT 1.4+ (16): struct ofp14_port_mod, uint8_t[8][]. */
+    OFPRAW_OFPT14_PORT_MOD,
+
+    /* OFPT 1.1-1.3 (17): struct ofp11_table_mod. */
+    OFPRAW_OFPT11_TABLE_MOD,
+    /* OFPT 1.4+ (17): struct ofp14_table_mod, uint8_t[8][]. */
+    OFPRAW_OFPT14_TABLE_MOD,
+
+    /* OFPT 1.0 (18): void. */
+    OFPRAW_OFPT10_BARRIER_REQUEST,
+    /* OFPT 1.1+ (20): void. */
+    OFPRAW_OFPT11_BARRIER_REQUEST,
+
+    /* OFPT 1.0 (19): void. */
+    OFPRAW_OFPT10_BARRIER_REPLY,
+    /* OFPT 1.1+ (21): void. */
+    OFPRAW_OFPT11_BARRIER_REPLY,
+
+    /* OFPT 1.0 (20): struct ofp10_queue_get_config_request. */
+    OFPRAW_OFPT10_QUEUE_GET_CONFIG_REQUEST,
+    /* OFPT 1.1-1.3 (22): struct ofp11_queue_get_config_request. */
+    OFPRAW_OFPT11_QUEUE_GET_CONFIG_REQUEST,
+
+    /* OFPT 1.0 (21): struct ofp10_queue_get_config_reply, uint8_t[8][]. */
+    OFPRAW_OFPT10_QUEUE_GET_CONFIG_REPLY,
+    /* OFPT 1.1-1.3 (23): struct ofp11_queue_get_config_reply, uint8_t[8][]. */
+    OFPRAW_OFPT11_QUEUE_GET_CONFIG_REPLY,
+
+    /* OFPT 1.2+ (24): struct ofp12_role_request. */
+    OFPRAW_OFPT12_ROLE_REQUEST,
+    /* NXT 1.0+ (10): struct nx_role_request. */
+    OFPRAW_NXT_ROLE_REQUEST,
+
+    /* OFPT 1.2+ (25): struct ofp12_role_request. */
+    OFPRAW_OFPT12_ROLE_REPLY,
+    /* NXT 1.0+ (11): struct nx_role_request. */
+    OFPRAW_NXT_ROLE_REPLY,
+
+    /* OFPT 1.3 (26): void. */
+    OFPRAW_OFPT13_GET_ASYNC_REQUEST,
+    /* OFPT 1.4+ (26): void. */
+    OFPRAW_OFPT14_GET_ASYNC_REQUEST,
+    /* OFPT 1.3 (27): struct ofp13_async_config. */
+    OFPRAW_OFPT13_GET_ASYNC_REPLY,
+    /* OFPT 1.4+ (27): uint8_t[8][]. */
+    OFPRAW_OFPT14_GET_ASYNC_REPLY,
+    /* OFPT 1.3 (28): struct ofp13_async_config. */
+    OFPRAW_OFPT13_SET_ASYNC,
+    /* NXT 1.0+ (19): struct nx_async_config. */
+    OFPRAW_NXT_SET_ASYNC_CONFIG,
+    /* NXT 1.0-1.3 (27): uint8_t[8][]. */
+    OFPRAW_NXT_SET_ASYNC_CONFIG2,
+    /* OFPT 1.4+ (28): uint8_t[8][]. */
+    OFPRAW_OFPT14_SET_ASYNC,
+
+    /* OFPT 1.3+ (29): struct ofp13_meter_mod, uint8_t[8][]. */
+    OFPRAW_OFPT13_METER_MOD,
+
+    /* OFPT 1.4+ (30): struct ofp14_role_status, uint8_t[8][]. */
+    OFPRAW_OFPT14_ROLE_STATUS,
+
+    /* OFPT 1.4+ (31): struct ofp14_table_status, uint8_t[8][]. */
+    OFPRAW_OFPT14_TABLE_STATUS,
+
+    /* OFPT 1.4+ (32): struct ofp14_requestforward, uint8_t[8][]. */
+    OFPRAW_OFPT14_REQUESTFORWARD,
+
+    /* OFPT 1.4+ (33): struct ofp14_bundle_ctrl_msg, uint8_t[8][]. */
+    OFPRAW_OFPT14_BUNDLE_CONTROL,
+    /* ONFT 1.3 (2300): struct ofp14_bundle_ctrl_msg, uint8_t[8][]. */
+    OFPRAW_ONFT13_BUNDLE_CONTROL,
+
+    /* OFPT 1.4+ (34): struct ofp14_bundle_ctrl_msg, uint8_t[]. */
+    OFPRAW_OFPT14_BUNDLE_ADD_MESSAGE,
+    /* ONFT 1.3 (2301): struct ofp14_bundle_ctrl_msg, uint8_t[]. */
+    OFPRAW_ONFT13_BUNDLE_ADD_MESSAGE,
+
+/* Standard statistics. */
+
+    /* OFPST 1.0+ (0): void. */
+    OFPRAW_OFPST_DESC_REQUEST,
+
+    /* OFPST 1.0+ (0): struct ofp_desc_stats. */
+    OFPRAW_OFPST_DESC_REPLY,
+
+    /* OFPST 1.0 (1): struct ofp10_flow_stats_request. */
+    OFPRAW_OFPST10_FLOW_REQUEST,
+    /* OFPST 1.1+ (1): struct ofp11_flow_stats_request, uint8_t[8][]. */
+    OFPRAW_OFPST11_FLOW_REQUEST,
+    /* NXST 1.0 (0): struct nx_flow_stats_request, uint8_t[8][]. */
+    OFPRAW_NXST_FLOW_REQUEST,
+
+    /* OFPST 1.0 (1): uint8_t[]. */
+    OFPRAW_OFPST10_FLOW_REPLY,
+    /* OFPST 1.1-1.2 (1): uint8_t[]. */
+    OFPRAW_OFPST11_FLOW_REPLY,
+    /* OFPST 1.3+ (1): uint8_t[]. */
+    OFPRAW_OFPST13_FLOW_REPLY,
+    /* NXST 1.0 (0): uint8_t[]. */
+    OFPRAW_NXST_FLOW_REPLY,
+
+    /* OFPST 1.0 (2): struct ofp10_flow_stats_request. */
+    OFPRAW_OFPST10_AGGREGATE_REQUEST,
+    /* OFPST 1.1+ (2): struct ofp11_flow_stats_request, uint8_t[8][]. */
+    OFPRAW_OFPST11_AGGREGATE_REQUEST,
+    /* NXST 1.0 (1): struct nx_flow_stats_request, uint8_t[8][]. */
+    OFPRAW_NXST_AGGREGATE_REQUEST,
+
+    /* OFPST 1.0+ (2): struct ofp_aggregate_stats_reply. */
+    OFPRAW_OFPST_AGGREGATE_REPLY,
+    /* NXST 1.0 (1): struct ofp_aggregate_stats_reply. */
+    OFPRAW_NXST_AGGREGATE_REPLY,
+
+    /* OFPST 1.0+ (3): void. */
+    OFPRAW_OFPST_TABLE_REQUEST,
+
+    /* OFPST 1.0 (3): struct ofp10_table_stats[]. */
+    OFPRAW_OFPST10_TABLE_REPLY,
+    /* OFPST 1.1 (3): struct ofp11_table_stats[]. */
+    OFPRAW_OFPST11_TABLE_REPLY,
+    /* OFPST 1.2 (3): struct ofp12_table_stats[]. */
+    OFPRAW_OFPST12_TABLE_REPLY,
+    /* OFPST 1.3+ (3): struct ofp13_table_stats[]. */
+    OFPRAW_OFPST13_TABLE_REPLY,
+
+    /* OFPST 1.0 (4): struct ofp10_port_stats_request. */
+    OFPRAW_OFPST10_PORT_REQUEST,
+    /* OFPST 1.1+ (4): struct ofp11_port_stats_request. */
+    OFPRAW_OFPST11_PORT_REQUEST,
+
+    /* OFPST 1.0 (4): struct ofp10_port_stats[]. */
+    OFPRAW_OFPST10_PORT_REPLY,
+    /* OFPST 1.1-1.2 (4): struct ofp11_port_stats[]. */
+    OFPRAW_OFPST11_PORT_REPLY,
+    /* OFPST 1.3 (4): struct ofp13_port_stats[]. */
+    OFPRAW_OFPST13_PORT_REPLY,
+    /* OFPST 1.4+ (4): uint8_t[8][]. */
+    OFPRAW_OFPST14_PORT_REPLY,
+
+    /* OFPST 1.0 (5): struct ofp10_queue_stats_request. */
+    OFPRAW_OFPST10_QUEUE_REQUEST,
+    /* OFPST 1.1+ (5): struct ofp11_queue_stats_request. */
+    OFPRAW_OFPST11_QUEUE_REQUEST,
+
+    /* OFPST 1.0 (5): struct ofp10_queue_stats[]. */
+    OFPRAW_OFPST10_QUEUE_REPLY,
+    /* OFPST 1.1-1.2 (5): struct ofp11_queue_stats[]. */
+    OFPRAW_OFPST11_QUEUE_REPLY,
+    /* OFPST 1.3 (5): struct ofp13_queue_stats[]. */
+    OFPRAW_OFPST13_QUEUE_REPLY,
+    /* OFPST 1.4+ (5): uint8_t[8][]. */
+    OFPRAW_OFPST14_QUEUE_REPLY,
+
+    /* OFPST 1.1+ (6): struct ofp11_group_stats_request. */
+    OFPRAW_OFPST11_GROUP_REQUEST,
+
+    /* OFPST 1.1-1.2 (6): uint8_t[8][]. */
+    OFPRAW_OFPST11_GROUP_REPLY,
+    /* OFPST 1.3+ (6): uint8_t[8][]. */
+    OFPRAW_OFPST13_GROUP_REPLY,
+
+    /* OFPST 1.1-1.4 (7): void. */
+    OFPRAW_OFPST11_GROUP_DESC_REQUEST,
+    /* OFPST 1.5+ (7): struct ofp15_group_desc_request. */
+    OFPRAW_OFPST15_GROUP_DESC_REQUEST,
+
+    /* OFPST 1.1+ (7): uint8_t[8][]. */
+    OFPRAW_OFPST11_GROUP_DESC_REPLY,
+
+    /* OFPST 1.2+ (8): void. */
+    OFPRAW_OFPST12_GROUP_FEATURES_REQUEST,
+
+    /* OFPST 1.2+ (8): struct ofp12_group_features_stats. */
+    OFPRAW_OFPST12_GROUP_FEATURES_REPLY,
+
+    /* OFPST 1.3+ (9): struct ofp13_meter_multipart_request. */
+    OFPRAW_OFPST13_METER_REQUEST,
+
+    /* OFPST 1.3+ (9): uint8_t[8][]. */
+    OFPRAW_OFPST13_METER_REPLY,
+
+    /* OFPST 1.3+ (10): struct ofp13_meter_multipart_request. */
+    OFPRAW_OFPST13_METER_CONFIG_REQUEST,
+
+    /* OFPST 1.3+ (10): uint8_t[8][]. */
+    OFPRAW_OFPST13_METER_CONFIG_REPLY,
+
+    /* OFPST 1.3+ (11): void. */
+    OFPRAW_OFPST13_METER_FEATURES_REQUEST,
+
+    /* OFPST 1.3+ (11): struct ofp13_meter_features. */
+    OFPRAW_OFPST13_METER_FEATURES_REPLY,
+
+    /* OFPST 1.3+ (12): void. */
+    OFPRAW_OFPST13_TABLE_FEATURES_REQUEST,
+
+    /* OFPST 1.3+ (12): struct ofp13_table_features, uint8_t[8][]. */
+    OFPRAW_OFPST13_TABLE_FEATURES_REPLY,
+
+    /* OFPST 1.4+ (14): void. */
+    OFPRAW_OFPST14_TABLE_DESC_REQUEST,
+
+    /* OFPST 1.4+ (14): struct ofp14_table_desc, uint8_t[8][]. */
+    OFPRAW_OFPST14_TABLE_DESC_REPLY,
+
+    /* OFPST 1.0-1.4 (13): void. */
+    OFPRAW_OFPST10_PORT_DESC_REQUEST,
+    /* OFPST 1.5+ (13): struct ofp15_port_desc_request. */
+    OFPRAW_OFPST15_PORT_DESC_REQUEST,
+
+    /* OFPST 1.0 (13): struct ofp10_phy_port[]. */
+    OFPRAW_OFPST10_PORT_DESC_REPLY,
+    /* OFPST 1.1-1.3 (13): struct ofp11_port[]. */
+    OFPRAW_OFPST11_PORT_DESC_REPLY,
+    /* OFPST 1.4+ (13): uint8_t[8][]. */
+    OFPRAW_OFPST14_PORT_DESC_REPLY,
+
+    /* OFPST 1.4+ (15): struct ofp14_queue_desc_request. */
+    OFPRAW_OFPST14_QUEUE_DESC_REQUEST,
+    /* OFPST 1.4+ (15): uint8_t[8][]. */
+    OFPRAW_OFPST14_QUEUE_DESC_REPLY,
+
+    /* OFPST 1.4+ (16): uint8_t[8][]. */
+    OFPRAW_OFPST14_FLOW_MONITOR_REQUEST,
+    /* NXST 1.0 (2): uint8_t[8][]. */
+    OFPRAW_NXST_FLOW_MONITOR_REQUEST,
+
+    /* OFPST 1.4+ (16): uint8_t[8][]. */
+    OFPRAW_OFPST14_FLOW_MONITOR_REPLY,
+    /* NXST 1.0 (2): uint8_t[8][]. */
+    OFPRAW_NXST_FLOW_MONITOR_REPLY,
+
+/* Nicira extension messages.
+ *
+ * Nicira extensions that correspond to standard OpenFlow messages are listed
+ * alongside the standard versions above. */
+
+    /* NXT 1.0 (12): struct nx_set_flow_format. */
+    OFPRAW_NXT_SET_FLOW_FORMAT,
+
+    /* NXT 1.0+ (15): struct nx_flow_mod_table_id. */
+    OFPRAW_NXT_FLOW_MOD_TABLE_ID,
+
+    /* NXT 1.0+ (16): struct nx_set_packet_in_format. */
+    OFPRAW_NXT_SET_PACKET_IN_FORMAT,
+
+    /* NXT 1.0+ (18): void. */
+    OFPRAW_NXT_FLOW_AGE,
+
+    /* NXT 1.0+ (20): struct nx_controller_id. */
+    OFPRAW_NXT_SET_CONTROLLER_ID,
+
+    /* NXT 1.0+ (21): struct nx_flow_monitor_cancel. */
+    OFPRAW_NXT_FLOW_MONITOR_CANCEL,
+
+    /* NXT 1.0+ (22): void. */
+    OFPRAW_NXT_FLOW_MONITOR_PAUSED,
+
+    /* NXT 1.0+ (23): void. */
+    OFPRAW_NXT_FLOW_MONITOR_RESUMED,
+
+    /* NXT 1.0+ (24): struct nx_tlv_table_mod, struct nx_tlv_map[]. */
+    OFPRAW_NXT_TLV_TABLE_MOD,
+
+    /* NXT 1.0+ (25): void. */
+    OFPRAW_NXT_TLV_TABLE_REQUEST,
+
+    /* NXT 1.0+ (26): struct nx_tlv_table_reply, struct nx_tlv_map[]. */
+    OFPRAW_NXT_TLV_TABLE_REPLY,
+
+    /* NXT 1.0+ (28): uint8_t[8][]. */
+    OFPRAW_NXT_RESUME,
+};
+
+/* Decoding messages into OFPRAW_* values. */
+enum ofperr ofpraw_decode(enum ofpraw *, const struct ofp_header *);
+enum ofpraw ofpraw_decode_assert(const struct ofp_header *);
+enum ofperr ofpraw_pull(enum ofpraw *, struct ofpbuf *);
+enum ofpraw ofpraw_pull_assert(struct ofpbuf *);
+
+enum ofperr ofpraw_decode_partial(enum ofpraw *,
+                                  const struct ofp_header *, size_t length);
+
+/* Encoding messages using OFPRAW_* values. */
+struct ofpbuf *ofpraw_alloc(enum ofpraw, uint8_t ofp_version,
+                            size_t extra_tailroom);
+struct ofpbuf *ofpraw_alloc_xid(enum ofpraw, uint8_t ofp_version,
+                                ovs_be32 xid, size_t extra_tailroom);
+struct ofpbuf *ofpraw_alloc_reply(enum ofpraw,
+                                  const struct ofp_header *request,
+                                  size_t extra_tailroom);
+struct ofpbuf *ofpraw_alloc_stats_reply(const struct ofp_header *request,
+                                        size_t extra_tailroom);
+
+void ofpraw_put(enum ofpraw, uint8_t ofp_version, struct ofpbuf *);
+void ofpraw_put_xid(enum ofpraw, uint8_t ofp_version, ovs_be32 xid,
+                    struct ofpbuf *);
+void ofpraw_put_reply(enum ofpraw, const struct ofp_header *request,
+                      struct ofpbuf *);
+void ofpraw_put_stats_reply(const struct ofp_header *request, struct ofpbuf *);
+
+/* Information about OFPRAW_* values. */
+const char *ofpraw_get_name(enum ofpraw);
+enum ofpraw ofpraw_stats_request_to_reply(enum ofpraw, uint8_t version);
+
+/* Semantic identifiers for OpenFlow messages.
+ *
+ * Each OFPTYPE_* enumeration constant represents one or more concrete format
+ * of OpenFlow message.  When two variants of a message have essentially the
+ * same meaning, they are assigned a single OFPTYPE_* value.
+ *
+ * The comments here must follow a stylized form because the "extract-ofp-msgs"
+ * program parses them at build time to generate data tables.  The format is
+ * simply to list each OFPRAW_* enumeration constant for a given OFPTYPE_*,
+ * each followed by a period. */
+enum ofptype {
+    /* Immutable messages. */
+    OFPTYPE_HELLO,               /* OFPRAW_OFPT_HELLO. */
+    OFPTYPE_ERROR,               /* OFPRAW_OFPT_ERROR. */
+    OFPTYPE_ECHO_REQUEST,        /* OFPRAW_OFPT_ECHO_REQUEST. */
+    OFPTYPE_ECHO_REPLY,          /* OFPRAW_OFPT_ECHO_REPLY. */
+
+    /* Switch configuration messages. */
+    OFPTYPE_FEATURES_REQUEST,    /* OFPRAW_OFPT_FEATURES_REQUEST. */
+    OFPTYPE_FEATURES_REPLY,      /* OFPRAW_OFPT10_FEATURES_REPLY.
+                                  * OFPRAW_OFPT11_FEATURES_REPLY.
+                                  * OFPRAW_OFPT13_FEATURES_REPLY. */
+    OFPTYPE_GET_CONFIG_REQUEST,  /* OFPRAW_OFPT_GET_CONFIG_REQUEST. */
+    OFPTYPE_GET_CONFIG_REPLY,    /* OFPRAW_OFPT_GET_CONFIG_REPLY. */
+    OFPTYPE_SET_CONFIG,          /* OFPRAW_OFPT_SET_CONFIG. */
+
+    /* Asynchronous messages. */
+    OFPTYPE_PACKET_IN,           /* OFPRAW_OFPT10_PACKET_IN.
+                                  * OFPRAW_OFPT11_PACKET_IN.
+                                  * OFPRAW_OFPT12_PACKET_IN.
+                                  * OFPRAW_OFPT13_PACKET_IN.
+                                  * OFPRAW_NXT_PACKET_IN2.
+                                  * OFPRAW_NXT_PACKET_IN. */
+    OFPTYPE_FLOW_REMOVED,        /* OFPRAW_OFPT10_FLOW_REMOVED.
+                                  * OFPRAW_OFPT11_FLOW_REMOVED.
+                                  * OFPRAW_NXT_FLOW_REMOVED. */
+    OFPTYPE_PORT_STATUS,         /* OFPRAW_OFPT10_PORT_STATUS.
+                                  * OFPRAW_OFPT11_PORT_STATUS.
+                                  * OFPRAW_OFPT14_PORT_STATUS. */
+
+    /* Controller command messages. */
+    OFPTYPE_PACKET_OUT,          /* OFPRAW_OFPT10_PACKET_OUT.
+                                  * OFPRAW_OFPT11_PACKET_OUT. */
+    OFPTYPE_FLOW_MOD,            /* OFPRAW_OFPT10_FLOW_MOD.
+                                  * OFPRAW_OFPT11_FLOW_MOD.
+                                  * OFPRAW_NXT_FLOW_MOD. */
+    OFPTYPE_GROUP_MOD,           /* OFPRAW_OFPT11_GROUP_MOD.
+                                  * OFPRAW_OFPT15_GROUP_MOD. */
+    OFPTYPE_PORT_MOD,            /* OFPRAW_OFPT10_PORT_MOD.
+                                  * OFPRAW_OFPT11_PORT_MOD.
+                                  * OFPRAW_OFPT14_PORT_MOD. */
+    OFPTYPE_TABLE_MOD,           /* OFPRAW_OFPT11_TABLE_MOD.
+                                  * OFPRAW_OFPT14_TABLE_MOD. */
+
+    /* Barrier messages. */
+    OFPTYPE_BARRIER_REQUEST,     /* OFPRAW_OFPT10_BARRIER_REQUEST.
+                                  * OFPRAW_OFPT11_BARRIER_REQUEST. */
+    OFPTYPE_BARRIER_REPLY,       /* OFPRAW_OFPT10_BARRIER_REPLY.
+                                  * OFPRAW_OFPT11_BARRIER_REPLY. */
+
+    /* Queue Configuration messages. */
+    OFPTYPE_QUEUE_GET_CONFIG_REQUEST, /* OFPRAW_OFPT10_QUEUE_GET_CONFIG_REQUEST.
+                                       * OFPRAW_OFPT11_QUEUE_GET_CONFIG_REQUEST.
+                                       * OFPRAW_OFPST14_QUEUE_DESC_REQUEST. */
+    OFPTYPE_QUEUE_GET_CONFIG_REPLY, /* OFPRAW_OFPT10_QUEUE_GET_CONFIG_REPLY.
+                                     * OFPRAW_OFPT11_QUEUE_GET_CONFIG_REPLY.
+                                     * OFPRAW_OFPST14_QUEUE_DESC_REPLY. */
+
+    /* Controller role change request messages. */
+    OFPTYPE_ROLE_REQUEST,         /* OFPRAW_OFPT12_ROLE_REQUEST.
+                                   * OFPRAW_NXT_ROLE_REQUEST. */
+    OFPTYPE_ROLE_REPLY,           /* OFPRAW_OFPT12_ROLE_REPLY.
+                                   * OFPRAW_NXT_ROLE_REPLY. */
+
+    /* Asynchronous message configuration. */
+    OFPTYPE_GET_ASYNC_REQUEST,    /* OFPRAW_OFPT13_GET_ASYNC_REQUEST.
+                                   * OFPRAW_OFPT14_GET_ASYNC_REQUEST. */
+    OFPTYPE_GET_ASYNC_REPLY,      /* OFPRAW_OFPT13_GET_ASYNC_REPLY.
+                                   * OFPRAW_OFPT14_GET_ASYNC_REPLY. */
+    OFPTYPE_SET_ASYNC_CONFIG,     /* OFPRAW_NXT_SET_ASYNC_CONFIG.
+                                   * OFPRAW_NXT_SET_ASYNC_CONFIG2.
+                                   * OFPRAW_OFPT13_SET_ASYNC.
+                                   * OFPRAW_OFPT14_SET_ASYNC. */
+
+    /* Meters and rate limiters configuration messages. */
+    OFPTYPE_METER_MOD,            /* OFPRAW_OFPT13_METER_MOD. */
+
+    /* Controller role change event messages. */
+    OFPTYPE_ROLE_STATUS,          /* OFPRAW_OFPT14_ROLE_STATUS. */
+
+    /* Request forwarding by the switch. */
+    OFPTYPE_REQUESTFORWARD,       /* OFPRAW_OFPT14_REQUESTFORWARD. */
+
+    /* Asynchronous messages. */
+    OFPTYPE_TABLE_STATUS,          /* OFPRAW_OFPT14_TABLE_STATUS. */
+
+    OFPTYPE_BUNDLE_CONTROL,       /* OFPRAW_OFPT14_BUNDLE_CONTROL.
+                                   * OFPRAW_ONFT13_BUNDLE_CONTROL. */
+
+    OFPTYPE_BUNDLE_ADD_MESSAGE,   /* OFPRAW_OFPT14_BUNDLE_ADD_MESSAGE.
+                                   * OFPRAW_ONFT13_BUNDLE_ADD_MESSAGE. */
+
+    /* Statistics. */
+    OFPTYPE_DESC_STATS_REQUEST,      /* OFPRAW_OFPST_DESC_REQUEST. */
+    OFPTYPE_DESC_STATS_REPLY,        /* OFPRAW_OFPST_DESC_REPLY. */
+    OFPTYPE_FLOW_STATS_REQUEST,      /* OFPRAW_OFPST10_FLOW_REQUEST.
+                                      * OFPRAW_OFPST11_FLOW_REQUEST.
+                                      * OFPRAW_NXST_FLOW_REQUEST. */
+    OFPTYPE_FLOW_STATS_REPLY,        /* OFPRAW_OFPST10_FLOW_REPLY.
+                                      * OFPRAW_OFPST11_FLOW_REPLY.
+                                      * OFPRAW_OFPST13_FLOW_REPLY.
+                                      * OFPRAW_NXST_FLOW_REPLY. */
+    OFPTYPE_AGGREGATE_STATS_REQUEST, /* OFPRAW_OFPST10_AGGREGATE_REQUEST.
+                                      * OFPRAW_OFPST11_AGGREGATE_REQUEST.
+                                      * OFPRAW_NXST_AGGREGATE_REQUEST. */
+    OFPTYPE_AGGREGATE_STATS_REPLY,   /* OFPRAW_OFPST_AGGREGATE_REPLY.
+                                      * OFPRAW_NXST_AGGREGATE_REPLY. */
+    OFPTYPE_TABLE_STATS_REQUEST,     /* OFPRAW_OFPST_TABLE_REQUEST. */
+    OFPTYPE_TABLE_STATS_REPLY,       /* OFPRAW_OFPST10_TABLE_REPLY.
+                                      * OFPRAW_OFPST11_TABLE_REPLY.
+                                      * OFPRAW_OFPST12_TABLE_REPLY.
+                                      * OFPRAW_OFPST13_TABLE_REPLY. */
+    OFPTYPE_PORT_STATS_REQUEST,      /* OFPRAW_OFPST10_PORT_REQUEST.
+                                      * OFPRAW_OFPST11_PORT_REQUEST. */
+    OFPTYPE_PORT_STATS_REPLY,        /* OFPRAW_OFPST10_PORT_REPLY.
+                                      * OFPRAW_OFPST11_PORT_REPLY.
+                                      * OFPRAW_OFPST13_PORT_REPLY.
+                                      * OFPRAW_OFPST14_PORT_REPLY. */
+    OFPTYPE_QUEUE_STATS_REQUEST,     /* OFPRAW_OFPST10_QUEUE_REQUEST.
+                                      * OFPRAW_OFPST11_QUEUE_REQUEST. */
+    OFPTYPE_QUEUE_STATS_REPLY,       /* OFPRAW_OFPST10_QUEUE_REPLY.
+                                      * OFPRAW_OFPST11_QUEUE_REPLY.
+                                      * OFPRAW_OFPST13_QUEUE_REPLY.
+                                      * OFPRAW_OFPST14_QUEUE_REPLY. */
+
+    OFPTYPE_GROUP_STATS_REQUEST,     /* OFPRAW_OFPST11_GROUP_REQUEST. */
+
+    OFPTYPE_GROUP_STATS_REPLY,       /* OFPRAW_OFPST11_GROUP_REPLY.
+                                      * OFPRAW_OFPST13_GROUP_REPLY. */
+
+    OFPTYPE_GROUP_DESC_STATS_REQUEST, /* OFPRAW_OFPST11_GROUP_DESC_REQUEST.
+                                       * OFPRAW_OFPST15_GROUP_DESC_REQUEST. */
+
+    OFPTYPE_GROUP_DESC_STATS_REPLY,  /* OFPRAW_OFPST11_GROUP_DESC_REPLY. */
+
+    OFPTYPE_GROUP_FEATURES_STATS_REQUEST, /* OFPRAW_OFPST12_GROUP_FEATURES_REQUEST. */
+
+    OFPTYPE_GROUP_FEATURES_STATS_REPLY, /* OFPRAW_OFPST12_GROUP_FEATURES_REPLY. */
+
+    OFPTYPE_METER_STATS_REQUEST,     /* OFPRAW_OFPST13_METER_REQUEST. */
+
+    OFPTYPE_METER_STATS_REPLY,       /* OFPRAW_OFPST13_METER_REPLY. */
+
+    OFPTYPE_METER_CONFIG_STATS_REQUEST, /* OFPRAW_OFPST13_METER_CONFIG_REQUEST. */
+
+    OFPTYPE_METER_CONFIG_STATS_REPLY, /* OFPRAW_OFPST13_METER_CONFIG_REPLY. */
+
+    OFPTYPE_METER_FEATURES_STATS_REQUEST, /* OFPRAW_OFPST13_METER_FEATURES_REQUEST. */
+
+    OFPTYPE_METER_FEATURES_STATS_REPLY, /* OFPRAW_OFPST13_METER_FEATURES_REPLY. */
+
+    OFPTYPE_TABLE_FEATURES_STATS_REQUEST, /* OFPRAW_OFPST13_TABLE_FEATURES_REQUEST. */
+
+    OFPTYPE_TABLE_FEATURES_STATS_REPLY, /* OFPRAW_OFPST13_TABLE_FEATURES_REPLY. */
+
+    OFPTYPE_TABLE_DESC_REQUEST,      /* OFPRAW_OFPST14_TABLE_DESC_REQUEST. */
+
+    OFPTYPE_TABLE_DESC_REPLY,        /* OFPRAW_OFPST14_TABLE_DESC_REPLY. */
+
+    OFPTYPE_PORT_DESC_STATS_REQUEST, /* OFPRAW_OFPST10_PORT_DESC_REQUEST.
+                                      * OFPRAW_OFPST15_PORT_DESC_REQUEST. */
+
+    OFPTYPE_PORT_DESC_STATS_REPLY,   /* OFPRAW_OFPST10_PORT_DESC_REPLY.
+                                      * OFPRAW_OFPST11_PORT_DESC_REPLY.
+                                      * OFPRAW_OFPST14_PORT_DESC_REPLY. */
+
+    OFPTYPE_FLOW_MONITOR_STATS_REQUEST, /* OFPRAW_OFPST14_FLOW_MONITOR_REQUEST.
+                                         * OFPRAW_NXST_FLOW_MONITOR_REQUEST. */
+    OFPTYPE_FLOW_MONITOR_STATS_REPLY,   /* OFPRAW_OFPST14_FLOW_MONITOR_REPLY.
+                                         * OFPRAW_NXST_FLOW_MONITOR_REPLY. */
+
+    /* Nicira extensions. */
+    OFPTYPE_SET_FLOW_FORMAT,      /* OFPRAW_NXT_SET_FLOW_FORMAT. */
+    OFPTYPE_FLOW_MOD_TABLE_ID,    /* OFPRAW_NXT_FLOW_MOD_TABLE_ID. */
+    OFPTYPE_SET_PACKET_IN_FORMAT, /* OFPRAW_NXT_SET_PACKET_IN_FORMAT. */
+    OFPTYPE_FLOW_AGE,             /* OFPRAW_NXT_FLOW_AGE. */
+    OFPTYPE_SET_CONTROLLER_ID,    /* OFPRAW_NXT_SET_CONTROLLER_ID. */
+    OFPTYPE_NXT_TLV_TABLE_MOD, /* OFPRAW_NXT_TLV_TABLE_MOD. */
+    OFPTYPE_NXT_TLV_TABLE_REQUEST, /* OFPRAW_NXT_TLV_TABLE_REQUEST. */
+    OFPTYPE_NXT_TLV_TABLE_REPLY, /* OFPRAW_NXT_TLV_TABLE_REPLY. */
+    OFPTYPE_NXT_RESUME,          /* OFPRAW_NXT_RESUME. */
+
+    /* Flow monitor extension. */
+    OFPTYPE_FLOW_MONITOR_CANCEL,        /* OFPRAW_NXT_FLOW_MONITOR_CANCEL. */
+    OFPTYPE_FLOW_MONITOR_PAUSED,        /* OFPRAW_NXT_FLOW_MONITOR_PAUSED. */
+    OFPTYPE_FLOW_MONITOR_RESUMED,       /* OFPRAW_NXT_FLOW_MONITOR_RESUMED. */
+};
+
+/* Decoding messages into OFPTYPE_* values. */
+enum ofperr ofptype_decode(enum ofptype *, const struct ofp_header *);
+enum ofperr ofptype_pull(enum ofptype *, struct ofpbuf *);
+enum ofptype ofptype_from_ofpraw(enum ofpraw);
+
+/* Information about OFTYPE_* values. */
+const char *ofptype_get_name(enum ofptype);
+
+/* OpenFlow message properties. */
+void ofpmsg_update_length(struct ofpbuf *);
+const void *ofpmsg_body(const struct ofp_header *);
+bool ofpmsg_is_stat_request(const struct ofp_header *);
+
+/* Multipart messages (aka "statistics").
+ *
+ * Individual OpenFlow messages are limited to 64 kB in size, but some messages
+ * need to be longer.  Therefore, multipart messages allow a longer message to
+ * be divided into multiple parts at some convenient boundary.  For example,
+ * limiting the response to a "flow dump" request to 64 kB would unreasonably
+ * limit the maximum number of flows in an OpenFlow switch, so a "flow dump" is
+ * expressed as a multipart request/reply pair, with the reply broken into
+ * pieces between flows.
+ *
+ * Multipart messages always consist of a request/reply pair.
+ *
+ * In OpenFlow 1.0, 1.1, and 1.2, requests must always fit in a single message,
+ * that is, only a multipart reply may have more than one part.  OpenFlow 1.3
+ * adds one multipart request.  This code does not yet support multipart
+ * requests. */
+
+/* Encoding multipart replies.
+ *
+ * These functions are useful for multipart replies that might really require
+ * more than one message.  A multipart message that is known in advance to fit
+ * within 64 kB doesn't need any special treatment, so you might as well use
+ * the ofpraw_alloc_*() functions.
+ *
+ * These functions work with a "struct ovs_list" of "struct ofpbuf"s, each of
+ * which represents one part of a multipart message. */
+void ofpmp_init(struct ovs_list *, const struct ofp_header *request);
+struct ofpbuf *ofpmp_reserve(struct ovs_list *, size_t len);
+void *ofpmp_append(struct ovs_list *, size_t len);
+void ofpmp_postappend(struct ovs_list *, size_t start_ofs);
+
+enum ofp_version ofpmp_version(struct ovs_list *);
+enum ofpraw ofpmp_decode_raw(struct ovs_list *);
+
+/* Decoding multipart replies. */
+uint16_t ofpmp_flags(const struct ofp_header *);
+bool ofpmp_more(const struct ofp_header *);
+
+#endif /* ofp-msgs.h */