c_gen/of_g_legacy.py - onos-loxi - Gitiles

 # Copyright 2013, Big Switch Networks, Inc.
 #
 # LoxiGen is licensed under the Eclipse Public License, version 1.0 (EPL), with
 # the following special exception:
 #
 # LOXI Exception
 #
 # As a special exception to the terms of the EPL, you may distribute libraries
 # generated by LoxiGen (LoxiGen Libraries) under the terms of your choice, provided
 # that copyright and licensing notices generated by LoxiGen are not altered or removed
 # from the LoxiGen Libraries and the notice provided below is (i) included in
 # the LoxiGen Libraries, if distributed in source code form and (ii) included in any
 # documentation for the LoxiGen Libraries, if distributed in binary form.
 #
 # Notice: "Copyright 2013, Big Switch Networks, Inc. This library was generated by the LoxiGen Compiler."
 #
 # You may not use this file except in compliance with the EPL or LOXI Exception. You may obtain
 # a copy of the EPL at:
 #
 # http://www.eclipse.org/legal/epl-v10.html
 #
 # 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
 # EPL for the specific language governing permissions and limitations
 # under the EPL.

 ##
 # @brief Global data structs for LOXI code generation
 #
 # @fixme This needs to be refactored and brought into the 21st century.
 #

 import loxi_globals

 ################################################################
 #
 # Configuration global parameters
 #
 ################################################################

 ##
 # The map from wire protocol to enum identifier generated from input
 # This is built from the version-specific structs file info.
 # @fixme This should go away when the process structs file is updated
 wire_ver_map = {}

 ##
 # The list of wire versions which are to be supported
 target_version_list = []

 ##
 # The dictionary of config variables related to code
 #
 # @param use_obj_id  Use object IDs in struct defns   CURRENTLY NOT SUPPORTED
 #
 # @param return_base_types For 'get' accessors, return values when possible.
 # Otherwise all values are returned thru a call by variable parameter
 #
 # @param use_static_inlines Generate low level accessors as static inline
 # and put them in header files rather than .c files.
 #
 # @param copy_semantics One of "read", "write" or "grow".  This defines the
 # way that buffer references are managed.  Currently on "read" is supported.
 #
 # @param encode_typedefs Use object and member IDs (rather than names)
 # when generating the names used for accessor function typedefs
 #
 # @param get_returns One of "error", "value", or "void";
 # CURRENTLY ONLY "error" IS SUPPORTED.  "error" means
 # all get operations return an error code.  "value" means return a base_type
 # value when possible or void if not.  "void" means always return void
 # and use a call-by-variable parameter
 #

 ## These members do not get normal accessors

 skip_members = ["version", "type", "length", "err_type", "stats_type", "len",
                 "type_len", "actions_len", "_command", "command", "key_length"]

 ## Some OpenFlow string length constants
 #
 # These are a few length constants needed for array processing
 ofp_constants = dict(
     OF_MAX_TABLE_NAME_LEN = 32,
     OF_MAX_PORT_NAME_LEN  = 16,
     OF_ETH_ALEN = 6,
     OF_DESC_STR_LEN   = 256,
     OF_SERIAL_NUM_LEN = 32,
     OF_APP_CODE_LEN = 15,
     OF_SIGID_LEN=6,
 )

 ## List of mixed data types
 #
 # This is a list of data types which require special treatment
 # because the underlying datatype has changed between versions.
 # The main example is port which went from 16 to 32 bits.  We
 # define per-version accessors for these types and those are
 # used in place of the normal ones.
 #
 # The wire protocol number is used to identify versions.  For now,
 # the value is the name of the type to use for that version
 #
 # This is the map between the external type (like of_port_no_t)
 # which is used by customers of this code and the internal
 # datatypes (like uint16_t) that appear on the wire for a
 # particular version.
 #
 of_mixed_types = dict(
     of_port_no_t = {
         1: "uint16_t",
         2: "uint32_t",
         3: "uint32_t",
         4: "uint32_t",
         5: "uint32_t",
         "short_name":"port_no"
         },
     of_port_desc_t = {
         1: "of_port_desc_t",
         2: "of_port_desc_t",
         3: "of_port_desc_t",
         4: "of_port_desc_t",
         5: "of_port_desc_t",
         "short_name":"port_desc"
         },
     of_bsn_vport_t = {
         1: "of_bsn_vport_t",
         2: "of_bsn_vport_t",
         3: "of_bsn_vport_t",
         4: "of_bsn_vport_t",
         5: "of_bsn_vport_t",
         "short_name":"bsn_vport"
         },
     of_fm_cmd_t = { # Flow mod command went from u16 to u8
         1: "uint16_t",
         2: "uint8_t",
         3: "uint8_t",
         4: "uint8_t",
         5: "uint8_t",
         "short_name":"fm_cmd"
         },
     of_wc_bmap_t = { # Wildcard bitmap
         1: "uint32_t",
         2: "uint32_t",
         3: "uint64_t",
         4: "uint64_t",
         5: "uint64_t",
         "short_name":"wc_bmap"
         },
     of_match_bmap_t = { # Match bitmap
         1: "uint32_t",
         2: "uint32_t",
         3: "uint64_t",
         4: "uint64_t",
         5: "uint64_t",
         "short_name":"match_bmap"
         },
     of_match_t = { # Match object
         1: "of_match_v1_t",
         2: "of_match_v2_t",
         3: "of_match_v3_t",
         4: "of_match_v3_t",  # Currently uses same match as 1.2 (v3).
         5: "of_match_v3_t",  # Currently uses same match as 1.2 (v3).
         "short_name":"match"
         },
     of_calient_port_desc_stats_entry_t = {
         1: "of_calient_port_desc_stats_entry_t",
         2: "of_calient_port_desc_stats_entry_t",
         3: "of_calient_port_desc_stats_entry_t",
         4: "of_calient_port_desc_stats_entry_t",
         5: "of_calient_port_desc_stats_entry_t",
         "short_name":"calient_port_desc_stats_entry"
         },
     of_odu_sig_id_t = {
         1: "of_odu_sig_id_t",
         2: "of_odu_sig_id_t",
         3: "of_odu_sig_id_t",
         4: "of_odu_sig_id_t",
         5: "of_odu_sig_id_t",
         "short_name":"odu_sig_id"
         },
     of_och_sig_id_t = {
         1: "of_sig_id_t",
         2: "of_sig_id_t",
         3: "of_sig_id_t",
         4: "of_sig_id_t",
         5: "of_sig_id_t",
         "short_name":"sig_id"
         },

 )

 ## Base data types
 #
 # The basic types; Value is a list: bytes, to_wire, from_wire
 # The accessors deal with endian, alignment and any other host/network
 # considerations.  These are common across all versions
 #
 # For get accessors, assume we memcpy from wire buf and then apply ntoh
 # For set accessors, assume we apply hton and then memcpy to wire buf
 #
 # to/from wire functions take a pointer to class and change in place
 of_base_types = dict(
     char = dict(bytes=1, use_as_rv=1, short_name="char"),
     uint8_t = dict(bytes=1, use_as_rv=1, short_name="u8"),
     uint16_t = dict(bytes=2, to_w="u16_hton", from_w="u16_ntoh", use_as_rv=1,
                     short_name="u16"),
     uint32_t = dict(bytes=4, to_w="u32_hton", from_w="u32_ntoh", use_as_rv=1,
                     short_name="u32"),
     uint64_t = dict(bytes=8, to_w="u64_hton", from_w="u64_ntoh", use_as_rv=1,
                     short_name="u64"),
 #    of_cookie_t = dict(bytes=8, to_w="u64_hton", from_w="u64_ntoh", use_as_rv=1#,
 #                    short_name="cookie"),
 #    of_counter_t = dict(bytes=8, to_w="u64_hton", from_w="u64_ntoh", use_as_rv=1,
 #                    short_name="counter"),
     of_mac_addr_t = dict(bytes=6, short_name="mac"),
     of_ipv4_t = dict(bytes=4, short_name="ipv4"),
     of_ipv6_t = dict(bytes=16, short_name="ipv6"),
     of_port_name_t = dict(bytes=ofp_constants["OF_MAX_PORT_NAME_LEN"],
                           short_name="port_name"),
     of_table_name_t = dict(bytes=ofp_constants["OF_MAX_TABLE_NAME_LEN"],
                            short_name="tab_name"),
     of_desc_str_t = dict(bytes=ofp_constants["OF_DESC_STR_LEN"],
                          short_name="desc_str"),
     of_serial_num_t = dict(bytes=ofp_constants["OF_SERIAL_NUM_LEN"],
                            short_name="ser_num"),
     of_str64_t = dict(bytes=64, short_name="str64"),
     of_str32_t = dict(bytes=32, short_name="str32"),
     of_str6_t = dict(bytes=6, short_name="str6"),
     of_match_v1_t = dict(bytes=40, to_w="match_v1_hton",
                          from_w="match_v1_ntoh",
                          short_name="match_v1"),
     of_match_v2_t = dict(bytes=88, to_w="match_v2_hton",
                          from_w="match_v2_ntoh",
                          short_name="match_v2"),
     of_match_v3_t = dict(bytes=-1, to_w="match_v3_hton",
                          from_w="match_v3_ntoh",
                          short_name="match_v3"),
 #    of_match_v4_t = dict(bytes=-1, to_w="match_v4_hton",
 #                         from_w="match_v4_ntoh",
 #                         short_name="match_v4"),
     of_octets_t = dict(bytes=-1, short_name="octets"),
     of_bitmap_128_t = dict(bytes=16, short_name="bitmap_128"),
     of_bitmap_512_t = dict(bytes=64, short_name="bitmap_512"),
     of_checksum_128_t = dict(bytes=16, short_name="checksum_128"),
     of_app_code_t = dict(bytes=ofp_constants["OF_APP_CODE_LEN"],
                           short_name="app_code"),
     of_sig_id_t = dict(bytes=ofp_constants["OF_SIGID_LEN"],
                           short_name="sig_id"),
     of_odu_sig_id_t = dict(bytes=1, short_name="odu_sig_id"),
 )

 of_scalar_types = ["char", "uint8_t", "uint16_t", "uint32_t", "uint64_t",
                    "of_port_no_t", "of_fm_cmd_t", "of_wc_bmap_t",
                    "of_match_bmap_t", "of_port_name_t", "of_table_name_t",
                    "of_desc_str_t", "of_serial_num_t", "of_mac_addr_t",
                    "of_ipv6_t", "of_ipv4_t", "of_bitmap_128_t", "of_checksum_128_t",
                    "of_str64_t", "of_str32_t", "of_str6_t", "of_bitmap_512_t"]

 ##
 # LOXI identifiers
 #
 # Dict indexed by identifier name.  Each entry contains the information
 # as a DotDict with the following keys:
 # values: A dict indexed by wire version giving each verion's value or None
 # common: The common value to use for this identifier at the LOXI top level (TBD)
 # all_same: If True, all the values across all versions are the same
 # ofp_name: The original name for the identifier
 # ofp_group: The ofp enumerated type if defined

 identifiers = {}

 ##
 # Identifiers by original group
 # Keys are the original group names.  Value is a list of LOXI identifiers

 identifiers_by_group = {}

 ## Ordered list of class names
 # This is per-wire-version and is a list of the classes in the order
 # they appear in the file.  That is important because of the assumption
 # that data members are defined before they are included in a superclass.
 ordered_classes = {} # Indexed by wire version

 ## Per class ordered list of member names
 ordered_members = {}

 ## Ordered list of message classes
 ordered_messages = []

 ## Ordered list of non message classes
 ordered_non_messages = []

 ## The objects that need list support
 ordered_list_objects = []

 ## Stats request/reply are pseudo objects
 ordered_pseudo_objects = []

 ## Standard order is normally messages followed by non-messages
 standard_class_order = []

 ## All classes in order, including psuedo classes for which most code
 # is not generated.
 all_class_order = []

 ## Map from class, wire_version to size of fixed part of class
 base_length = {}

 ## Boolean indication of variable length, per class, wire_version,
 is_fixed_length = set()

 ## The global object ID counter
 object_id = 1  # Reserve 0 for root object

 ## The unified view of all classes.  See internal readme.
 unified = {}

 ## Indicates data members with non-fixed start offsets
 # Indexed by (cls, version, member-name) and value is prev-member-name
 special_offsets = {}

 # Map from wire version to OF_1_x
 short_version_names = {}

 # The iteration object that gives the wire versions supported
 of_version_range = []

 # Map from wire version to OF_VERSION_1_x
 of_version_wire2name = {}

 for version in loxi_globals.OFVersions.all_supported:
     v = version.version.replace('.', '_')
     short_version_names[version.wire_version] = 'OF_' + v
     of_version_range.append(version.wire_version)
     of_version_wire2name[version.wire_version] = 'OF_VERSION_' + v
     globals()['VERSION_' + v] = version.wire_version


 ################################################################
 #
 # Experimenters, vendors, extensions
 #
 # Although the term "experimenter" is used for identifying
 # external extension definitions, we generally use the term
 # extension when refering to the messages or objects themselves.
 #
 # Conventions:
 #
 # Extension messages should start with of_<experimenter>_
 # Extension actions should start with of_<experimenter>_action_
 # Extension instructions should start with of_<experimenter>_instructions_
 #
 # Currently, the above conventions are not enforced; the mapping
 # is done brute force in type_maps.py
 #
 ################################################################

 # The map of known experimenters to their experimenter IDs
 experimenter_name_to_id = dict(
     bsn = 0x005c16c7,
     nicira = 0x00002320,
     openflow = 0x000026e1
     )
	# Copyright 2013, Big Switch Networks, Inc.
	#
	# LoxiGen is licensed under the Eclipse Public License, version 1.0 (EPL), with
	# the following special exception:
	#
	# LOXI Exception
	#
	# As a special exception to the terms of the EPL, you may distribute libraries
	# generated by LoxiGen (LoxiGen Libraries) under the terms of your choice, provided
	# that copyright and licensing notices generated by LoxiGen are not altered or removed
	# from the LoxiGen Libraries and the notice provided below is (i) included in
	# the LoxiGen Libraries, if distributed in source code form and (ii) included in any
	# documentation for the LoxiGen Libraries, if distributed in binary form.
	#
	# Notice: "Copyright 2013, Big Switch Networks, Inc. This library was generated by the LoxiGen Compiler."
	#
	# You may not use this file except in compliance with the EPL or LOXI Exception. You may obtain
	# a copy of the EPL at:
	#
	# http://www.eclipse.org/legal/epl-v10.html
	#
	# 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
	# EPL for the specific language governing permissions and limitations
	# under the EPL.

	##
	# @brief Global data structs for LOXI code generation
	#
	# @fixme This needs to be refactored and brought into the 21st century.
	#

	import loxi_globals

	################################################################
	#
	# Configuration global parameters
	#
	################################################################

	##
	# The map from wire protocol to enum identifier generated from input
	# This is built from the version-specific structs file info.
	# @fixme This should go away when the process structs file is updated
	wire_ver_map = {}

	##
	# The list of wire versions which are to be supported
	target_version_list = []

	##
	# The dictionary of config variables related to code
	#
	# @param use_obj_id Use object IDs in struct defns CURRENTLY NOT SUPPORTED
	#
	# @param return_base_types For 'get' accessors, return values when possible.
	# Otherwise all values are returned thru a call by variable parameter
	#
	# @param use_static_inlines Generate low level accessors as static inline
	# and put them in header files rather than .c files.
	#
	# @param copy_semantics One of "read", "write" or "grow". This defines the
	# way that buffer references are managed. Currently on "read" is supported.
	#
	# @param encode_typedefs Use object and member IDs (rather than names)
	# when generating the names used for accessor function typedefs
	#
	# @param get_returns One of "error", "value", or "void";
	# CURRENTLY ONLY "error" IS SUPPORTED. "error" means
	# all get operations return an error code. "value" means return a base_type
	# value when possible or void if not. "void" means always return void
	# and use a call-by-variable parameter
	#

	## These members do not get normal accessors

	skip_members = ["version", "type", "length", "err_type", "stats_type", "len",
	"type_len", "actions_len", "_command", "command", "key_length"]

	## Some OpenFlow string length constants
	#
	# These are a few length constants needed for array processing
	ofp_constants = dict(
	OF_MAX_TABLE_NAME_LEN = 32,
	OF_MAX_PORT_NAME_LEN = 16,
	OF_ETH_ALEN = 6,
	OF_DESC_STR_LEN = 256,
	OF_SERIAL_NUM_LEN = 32,
	OF_APP_CODE_LEN = 15,
	OF_SIGID_LEN=6,
	)

	## List of mixed data types
	#
	# This is a list of data types which require special treatment
	# because the underlying datatype has changed between versions.
	# The main example is port which went from 16 to 32 bits. We
	# define per-version accessors for these types and those are
	# used in place of the normal ones.
	#
	# The wire protocol number is used to identify versions. For now,
	# the value is the name of the type to use for that version
	#
	# This is the map between the external type (like of_port_no_t)
	# which is used by customers of this code and the internal
	# datatypes (like uint16_t) that appear on the wire for a
	# particular version.
	#
	of_mixed_types = dict(
	of_port_no_t = {
	1: "uint16_t",
	2: "uint32_t",
	3: "uint32_t",
	4: "uint32_t",
	5: "uint32_t",
	"short_name":"port_no"
	},
	of_port_desc_t = {
	1: "of_port_desc_t",
	2: "of_port_desc_t",
	3: "of_port_desc_t",
	4: "of_port_desc_t",
	5: "of_port_desc_t",
	"short_name":"port_desc"
	},
	of_bsn_vport_t = {
	1: "of_bsn_vport_t",
	2: "of_bsn_vport_t",
	3: "of_bsn_vport_t",
	4: "of_bsn_vport_t",
	5: "of_bsn_vport_t",
	"short_name":"bsn_vport"
	},
	of_fm_cmd_t = { # Flow mod command went from u16 to u8
	1: "uint16_t",
	2: "uint8_t",
	3: "uint8_t",
	4: "uint8_t",
	5: "uint8_t",
	"short_name":"fm_cmd"
	},
	of_wc_bmap_t = { # Wildcard bitmap
	1: "uint32_t",
	2: "uint32_t",
	3: "uint64_t",
	4: "uint64_t",
	5: "uint64_t",
	"short_name":"wc_bmap"
	},
	of_match_bmap_t = { # Match bitmap
	1: "uint32_t",
	2: "uint32_t",
	3: "uint64_t",
	4: "uint64_t",
	5: "uint64_t",
	"short_name":"match_bmap"
	},
	of_match_t = { # Match object
	1: "of_match_v1_t",
	2: "of_match_v2_t",
	3: "of_match_v3_t",
	4: "of_match_v3_t", # Currently uses same match as 1.2 (v3).
	5: "of_match_v3_t", # Currently uses same match as 1.2 (v3).
	"short_name":"match"
	},
	of_calient_port_desc_stats_entry_t = {
	1: "of_calient_port_desc_stats_entry_t",
	2: "of_calient_port_desc_stats_entry_t",
	3: "of_calient_port_desc_stats_entry_t",
	4: "of_calient_port_desc_stats_entry_t",
	5: "of_calient_port_desc_stats_entry_t",
	"short_name":"calient_port_desc_stats_entry"
	},
	of_odu_sig_id_t = {
	1: "of_odu_sig_id_t",
	2: "of_odu_sig_id_t",
	3: "of_odu_sig_id_t",
	4: "of_odu_sig_id_t",
	5: "of_odu_sig_id_t",
	"short_name":"odu_sig_id"
	},
	of_och_sig_id_t = {
	1: "of_sig_id_t",
	2: "of_sig_id_t",
	3: "of_sig_id_t",
	4: "of_sig_id_t",
	5: "of_sig_id_t",
	"short_name":"sig_id"
	},

	)

	## Base data types
	#
	# The basic types; Value is a list: bytes, to_wire, from_wire
	# The accessors deal with endian, alignment and any other host/network
	# considerations. These are common across all versions
	#
	# For get accessors, assume we memcpy from wire buf and then apply ntoh
	# For set accessors, assume we apply hton and then memcpy to wire buf
	#
	# to/from wire functions take a pointer to class and change in place
	of_base_types = dict(
	char = dict(bytes=1, use_as_rv=1, short_name="char"),
	uint8_t = dict(bytes=1, use_as_rv=1, short_name="u8"),
	uint16_t = dict(bytes=2, to_w="u16_hton", from_w="u16_ntoh", use_as_rv=1,
	short_name="u16"),
	uint32_t = dict(bytes=4, to_w="u32_hton", from_w="u32_ntoh", use_as_rv=1,
	short_name="u32"),
	uint64_t = dict(bytes=8, to_w="u64_hton", from_w="u64_ntoh", use_as_rv=1,
	short_name="u64"),
	# of_cookie_t = dict(bytes=8, to_w="u64_hton", from_w="u64_ntoh", use_as_rv=1#,
	# short_name="cookie"),
	# of_counter_t = dict(bytes=8, to_w="u64_hton", from_w="u64_ntoh", use_as_rv=1,
	# short_name="counter"),
	of_mac_addr_t = dict(bytes=6, short_name="mac"),
	of_ipv4_t = dict(bytes=4, short_name="ipv4"),
	of_ipv6_t = dict(bytes=16, short_name="ipv6"),
	of_port_name_t = dict(bytes=ofp_constants["OF_MAX_PORT_NAME_LEN"],
	short_name="port_name"),
	of_table_name_t = dict(bytes=ofp_constants["OF_MAX_TABLE_NAME_LEN"],
	short_name="tab_name"),
	of_desc_str_t = dict(bytes=ofp_constants["OF_DESC_STR_LEN"],
	short_name="desc_str"),
	of_serial_num_t = dict(bytes=ofp_constants["OF_SERIAL_NUM_LEN"],
	short_name="ser_num"),
	of_str64_t = dict(bytes=64, short_name="str64"),
	of_str32_t = dict(bytes=32, short_name="str32"),
	of_str6_t = dict(bytes=6, short_name="str6"),
	of_match_v1_t = dict(bytes=40, to_w="match_v1_hton",
	from_w="match_v1_ntoh",
	short_name="match_v1"),
	of_match_v2_t = dict(bytes=88, to_w="match_v2_hton",
	from_w="match_v2_ntoh",
	short_name="match_v2"),
	of_match_v3_t = dict(bytes=-1, to_w="match_v3_hton",
	from_w="match_v3_ntoh",
	short_name="match_v3"),
	# of_match_v4_t = dict(bytes=-1, to_w="match_v4_hton",
	# from_w="match_v4_ntoh",
	# short_name="match_v4"),
	of_octets_t = dict(bytes=-1, short_name="octets"),
	of_bitmap_128_t = dict(bytes=16, short_name="bitmap_128"),
	of_bitmap_512_t = dict(bytes=64, short_name="bitmap_512"),
	of_checksum_128_t = dict(bytes=16, short_name="checksum_128"),
	of_app_code_t = dict(bytes=ofp_constants["OF_APP_CODE_LEN"],
	short_name="app_code"),
	of_sig_id_t = dict(bytes=ofp_constants["OF_SIGID_LEN"],
	short_name="sig_id"),
	of_odu_sig_id_t = dict(bytes=1, short_name="odu_sig_id"),
	)

	of_scalar_types = ["char", "uint8_t", "uint16_t", "uint32_t", "uint64_t",
	"of_port_no_t", "of_fm_cmd_t", "of_wc_bmap_t",
	"of_match_bmap_t", "of_port_name_t", "of_table_name_t",
	"of_desc_str_t", "of_serial_num_t", "of_mac_addr_t",
	"of_ipv6_t", "of_ipv4_t", "of_bitmap_128_t", "of_checksum_128_t",
	"of_str64_t", "of_str32_t", "of_str6_t", "of_bitmap_512_t"]

	##
	# LOXI identifiers
	#
	# Dict indexed by identifier name. Each entry contains the information
	# as a DotDict with the following keys:
	# values: A dict indexed by wire version giving each verion's value or None
	# common: The common value to use for this identifier at the LOXI top level (TBD)
	# all_same: If True, all the values across all versions are the same
	# ofp_name: The original name for the identifier
	# ofp_group: The ofp enumerated type if defined

	identifiers = {}

	##
	# Identifiers by original group
	# Keys are the original group names. Value is a list of LOXI identifiers

	identifiers_by_group = {}

	## Ordered list of class names
	# This is per-wire-version and is a list of the classes in the order
	# they appear in the file. That is important because of the assumption
	# that data members are defined before they are included in a superclass.
	ordered_classes = {} # Indexed by wire version

	## Per class ordered list of member names
	ordered_members = {}

	## Ordered list of message classes
	ordered_messages = []

	## Ordered list of non message classes
	ordered_non_messages = []

	## The objects that need list support
	ordered_list_objects = []

	## Stats request/reply are pseudo objects
	ordered_pseudo_objects = []

	## Standard order is normally messages followed by non-messages
	standard_class_order = []

	## All classes in order, including psuedo classes for which most code
	# is not generated.
	all_class_order = []

	## Map from class, wire_version to size of fixed part of class
	base_length = {}

	## Boolean indication of variable length, per class, wire_version,
	is_fixed_length = set()

	## The global object ID counter
	object_id = 1 # Reserve 0 for root object

	## The unified view of all classes. See internal readme.
	unified = {}

	## Indicates data members with non-fixed start offsets
	# Indexed by (cls, version, member-name) and value is prev-member-name
	special_offsets = {}

	# Map from wire version to OF_1_x
	short_version_names = {}

	# The iteration object that gives the wire versions supported
	of_version_range = []

	# Map from wire version to OF_VERSION_1_x
	of_version_wire2name = {}

	for version in loxi_globals.OFVersions.all_supported:
	v = version.version.replace('.', '_')
	short_version_names[version.wire_version] = 'OF_' + v
	of_version_range.append(version.wire_version)
	of_version_wire2name[version.wire_version] = 'OF_VERSION_' + v
	globals()['VERSION_' + v] = version.wire_version


	################################################################
	#
	# Experimenters, vendors, extensions
	#
	# Although the term "experimenter" is used for identifying
	# external extension definitions, we generally use the term
	# extension when refering to the messages or objects themselves.
	#
	# Conventions:
	#
	# Extension messages should start with of_<experimenter>_
	# Extension actions should start with of_<experimenter>_action_
	# Extension instructions should start with of_<experimenter>_instructions_
	#
	# Currently, the above conventions are not enforced; the mapping
	# is done brute force in type_maps.py
	#
	################################################################

	# The map of known experimenters to their experimenter IDs
	experimenter_name_to_id = dict(
	bsn = 0x005c16c7,
	nicira = 0x00002320,
	openflow = 0x000026e1
	)