diff --git a/src/python/loxi/of12/const.py b/src/python/loxi/of12/const.py
new file mode 100644
index 0000000..fa9c93c
--- /dev/null
+++ b/src/python/loxi/of12/const.py
@@ -0,0 +1,760 @@
+# Copyright (c) 2008 The Board of Trustees of The Leland Stanford Junior University
+# Copyright (c) 2011, 2012 Open Networking Foundation
+# Copyright (c) 2012, 2013 Big Switch Networks, Inc.
+
+# Automatically generated by LOXI from template const.py
+# Do not modify
+
+OFP_VERSION = 3
+
+# Identifiers from group macro_definitions
+OFP_VLAN_NONE = 0
+OFP_FLOW_PERMANENT = 0
+OFP_ETH_ALEN = 6
+OFP_MAX_PORT_NAME_LEN = 16
+OFP_MAX_TABLE_NAME_LEN = 32
+SERIAL_NUM_LEN = 32
+OFP_DEFAULT_MISS_SEND_LEN = 128
+DESC_STR_LEN = 256
+OFP_TCP_PORT = 6633
+OFP_SSL_PORT = 6633
+OFP_DEFAULT_PRIORITY = 32768
+OFPQ_MIN_RATE_UNCFG = 65535
+OFPQ_MAX_RATE_UNCFG = 65535
+OFPQ_ALL = 4294967295
+OFP_NO_BUFFER = 4294967295
+
+# Identifiers from group ofp_action_type
+OFPAT_OUTPUT = 0
+OFPAT_COPY_TTL_OUT = 11
+OFPAT_COPY_TTL_IN = 12
+OFPAT_SET_MPLS_TTL = 15
+OFPAT_DEC_MPLS_TTL = 16
+OFPAT_PUSH_VLAN = 17
+OFPAT_POP_VLAN = 18
+OFPAT_PUSH_MPLS = 19
+OFPAT_POP_MPLS = 20
+OFPAT_SET_QUEUE = 21
+OFPAT_GROUP = 22
+OFPAT_SET_NW_TTL = 23
+OFPAT_DEC_NW_TTL = 24
+OFPAT_SET_FIELD = 25
+OFPAT_EXPERIMENTER = 65535
+
+ofp_action_type_map = {
+    0: 'OFPAT_OUTPUT',
+    11: 'OFPAT_COPY_TTL_OUT',
+    12: 'OFPAT_COPY_TTL_IN',
+    15: 'OFPAT_SET_MPLS_TTL',
+    16: 'OFPAT_DEC_MPLS_TTL',
+    17: 'OFPAT_PUSH_VLAN',
+    18: 'OFPAT_POP_VLAN',
+    19: 'OFPAT_PUSH_MPLS',
+    20: 'OFPAT_POP_MPLS',
+    21: 'OFPAT_SET_QUEUE',
+    22: 'OFPAT_GROUP',
+    23: 'OFPAT_SET_NW_TTL',
+    24: 'OFPAT_DEC_NW_TTL',
+    25: 'OFPAT_SET_FIELD',
+    65535: 'OFPAT_EXPERIMENTER',
+}
+
+# Identifiers from group ofp_bad_action_code
+OFPBAC_BAD_TYPE = 0
+OFPBAC_BAD_LEN = 1
+OFPBAC_BAD_EXPERIMENTER = 2
+OFPBAC_BAD_EXP_TYPE = 3
+OFPBAC_BAD_OUT_PORT = 4
+OFPBAC_BAD_ARGUMENT = 5
+OFPBAC_EPERM = 6
+OFPBAC_TOO_MANY = 7
+OFPBAC_BAD_QUEUE = 8
+OFPBAC_BAD_OUT_GROUP = 9
+OFPBAC_MATCH_INCONSISTENT = 10
+OFPBAC_UNSUPPORTED_ORDER = 11
+OFPBAC_BAD_TAG = 12
+OFPBAC_BAD_SET_TYPE = 13
+OFPBAC_BAD_SET_LEN = 14
+OFPBAC_BAD_SET_ARGUMENT = 15
+
+ofp_bad_action_code_map = {
+    0: 'OFPBAC_BAD_TYPE',
+    1: 'OFPBAC_BAD_LEN',
+    2: 'OFPBAC_BAD_EXPERIMENTER',
+    3: 'OFPBAC_BAD_EXP_TYPE',
+    4: 'OFPBAC_BAD_OUT_PORT',
+    5: 'OFPBAC_BAD_ARGUMENT',
+    6: 'OFPBAC_EPERM',
+    7: 'OFPBAC_TOO_MANY',
+    8: 'OFPBAC_BAD_QUEUE',
+    9: 'OFPBAC_BAD_OUT_GROUP',
+    10: 'OFPBAC_MATCH_INCONSISTENT',
+    11: 'OFPBAC_UNSUPPORTED_ORDER',
+    12: 'OFPBAC_BAD_TAG',
+    13: 'OFPBAC_BAD_SET_TYPE',
+    14: 'OFPBAC_BAD_SET_LEN',
+    15: 'OFPBAC_BAD_SET_ARGUMENT',
+}
+
+# Identifiers from group ofp_bad_instruction_code
+OFPBIC_UNKNOWN_INST = 0
+OFPBIC_UNSUP_INST = 1
+OFPBIC_BAD_TABLE_ID = 2
+OFPBIC_UNSUP_METADATA = 3
+OFPBIC_UNSUP_METADATA_MASK = 4
+OFPBIC_BAD_EXPERIMENTER = 5
+OFPBIC_BAD_EXP_TYPE = 6
+OFPBIC_BAD_LEN = 7
+OFPBIC_EPERM = 8
+
+ofp_bad_instruction_code_map = {
+    0: 'OFPBIC_UNKNOWN_INST',
+    1: 'OFPBIC_UNSUP_INST',
+    2: 'OFPBIC_BAD_TABLE_ID',
+    3: 'OFPBIC_UNSUP_METADATA',
+    4: 'OFPBIC_UNSUP_METADATA_MASK',
+    5: 'OFPBIC_BAD_EXPERIMENTER',
+    6: 'OFPBIC_BAD_EXP_TYPE',
+    7: 'OFPBIC_BAD_LEN',
+    8: 'OFPBIC_EPERM',
+}
+
+# Identifiers from group ofp_bad_match_code
+OFPBMC_BAD_TYPE = 0
+OFPBMC_BAD_LEN = 1
+OFPBMC_BAD_TAG = 2
+OFPBMC_BAD_DL_ADDR_MASK = 3
+OFPBMC_BAD_NW_ADDR_MASK = 4
+OFPBMC_BAD_WILDCARDS = 5
+OFPBMC_BAD_FIELD = 6
+OFPBMC_BAD_VALUE = 7
+OFPBMC_BAD_MASK = 8
+OFPBMC_BAD_PREREQ = 9
+OFPBMC_DUP_FIELD = 10
+OFPBMC_EPERM = 11
+
+ofp_bad_match_code_map = {
+    0: 'OFPBMC_BAD_TYPE',
+    1: 'OFPBMC_BAD_LEN',
+    2: 'OFPBMC_BAD_TAG',
+    3: 'OFPBMC_BAD_DL_ADDR_MASK',
+    4: 'OFPBMC_BAD_NW_ADDR_MASK',
+    5: 'OFPBMC_BAD_WILDCARDS',
+    6: 'OFPBMC_BAD_FIELD',
+    7: 'OFPBMC_BAD_VALUE',
+    8: 'OFPBMC_BAD_MASK',
+    9: 'OFPBMC_BAD_PREREQ',
+    10: 'OFPBMC_DUP_FIELD',
+    11: 'OFPBMC_EPERM',
+}
+
+# Identifiers from group ofp_bad_request_code
+OFPBRC_BAD_VERSION = 0
+OFPBRC_BAD_TYPE = 1
+OFPBRC_BAD_STAT = 2
+OFPBRC_BAD_EXPERIMENTER = 3
+OFPBRC_BAD_EXP_TYPE = 4
+OFPBRC_EPERM = 5
+OFPBRC_BAD_LEN = 6
+OFPBRC_BUFFER_EMPTY = 7
+OFPBRC_BUFFER_UNKNOWN = 8
+OFPBRC_BAD_TABLE_ID = 9
+OFPBRC_IS_SLAVE = 10
+OFPBRC_BAD_PORT = 11
+OFPBRC_BAD_PACKET = 12
+
+ofp_bad_request_code_map = {
+    0: 'OFPBRC_BAD_VERSION',
+    1: 'OFPBRC_BAD_TYPE',
+    2: 'OFPBRC_BAD_STAT',
+    3: 'OFPBRC_BAD_EXPERIMENTER',
+    4: 'OFPBRC_BAD_EXP_TYPE',
+    5: 'OFPBRC_EPERM',
+    6: 'OFPBRC_BAD_LEN',
+    7: 'OFPBRC_BUFFER_EMPTY',
+    8: 'OFPBRC_BUFFER_UNKNOWN',
+    9: 'OFPBRC_BAD_TABLE_ID',
+    10: 'OFPBRC_IS_SLAVE',
+    11: 'OFPBRC_BAD_PORT',
+    12: 'OFPBRC_BAD_PACKET',
+}
+
+# Identifiers from group ofp_capabilities
+OFPC_FLOW_STATS = 1
+OFPC_TABLE_STATS = 2
+OFPC_PORT_STATS = 4
+OFPC_GROUP_STATS = 8
+OFPC_IP_REASM = 32
+OFPC_QUEUE_STATS = 64
+OFPC_PORT_BLOCKED = 256
+
+ofp_capabilities_map = {
+    1: 'OFPC_FLOW_STATS',
+    2: 'OFPC_TABLE_STATS',
+    4: 'OFPC_PORT_STATS',
+    8: 'OFPC_GROUP_STATS',
+    32: 'OFPC_IP_REASM',
+    64: 'OFPC_QUEUE_STATS',
+    256: 'OFPC_PORT_BLOCKED',
+}
+
+# Identifiers from group ofp_config_flags
+OFPC_FRAG_NORMAL = 0
+OFPC_FRAG_DROP = 1
+OFPC_FRAG_REASM = 2
+OFPC_FRAG_MASK = 3
+OFPC_INVALID_TTL_TO_CONTROLLER = 4
+
+ofp_config_flags_map = {
+    0: 'OFPC_FRAG_NORMAL',
+    1: 'OFPC_FRAG_DROP',
+    2: 'OFPC_FRAG_REASM',
+    3: 'OFPC_FRAG_MASK',
+    4: 'OFPC_INVALID_TTL_TO_CONTROLLER',
+}
+
+# Identifiers from group ofp_controller_max_len
+OFPCML_MAX = 65509
+OFPCML_NO_BUFFER = 65535
+
+ofp_controller_max_len_map = {
+    65509: 'OFPCML_MAX',
+    65535: 'OFPCML_NO_BUFFER',
+}
+
+# Identifiers from group ofp_controller_role
+OFPCR_ROLE_NOCHANGE = 0
+OFPCR_ROLE_EQUAL = 1
+OFPCR_ROLE_MASTER = 2
+OFPCR_ROLE_SLAVE = 3
+
+ofp_controller_role_map = {
+    0: 'OFPCR_ROLE_NOCHANGE',
+    1: 'OFPCR_ROLE_EQUAL',
+    2: 'OFPCR_ROLE_MASTER',
+    3: 'OFPCR_ROLE_SLAVE',
+}
+
+# Identifiers from group ofp_error_type
+OFPET_HELLO_FAILED = 0
+OFPET_BAD_REQUEST = 1
+OFPET_BAD_ACTION = 2
+OFPET_BAD_INSTRUCTION = 3
+OFPET_BAD_MATCH = 4
+OFPET_FLOW_MOD_FAILED = 5
+OFPET_GROUP_MOD_FAILED = 6
+OFPET_PORT_MOD_FAILED = 7
+OFPET_TABLE_MOD_FAILED = 8
+OFPET_QUEUE_OP_FAILED = 9
+OFPET_SWITCH_CONFIG_FAILED = 10
+OFPET_ROLE_REQUEST_FAILED = 11
+OFPET_EXPERIMENTER = 65535
+
+ofp_error_type_map = {
+    0: 'OFPET_HELLO_FAILED',
+    1: 'OFPET_BAD_REQUEST',
+    2: 'OFPET_BAD_ACTION',
+    3: 'OFPET_BAD_INSTRUCTION',
+    4: 'OFPET_BAD_MATCH',
+    5: 'OFPET_FLOW_MOD_FAILED',
+    6: 'OFPET_GROUP_MOD_FAILED',
+    7: 'OFPET_PORT_MOD_FAILED',
+    8: 'OFPET_TABLE_MOD_FAILED',
+    9: 'OFPET_QUEUE_OP_FAILED',
+    10: 'OFPET_SWITCH_CONFIG_FAILED',
+    11: 'OFPET_ROLE_REQUEST_FAILED',
+    65535: 'OFPET_EXPERIMENTER',
+}
+
+# Identifiers from group ofp_flow_mod_command
+OFPFC_ADD = 0
+OFPFC_MODIFY = 1
+OFPFC_MODIFY_STRICT = 2
+OFPFC_DELETE = 3
+OFPFC_DELETE_STRICT = 4
+
+ofp_flow_mod_command_map = {
+    0: 'OFPFC_ADD',
+    1: 'OFPFC_MODIFY',
+    2: 'OFPFC_MODIFY_STRICT',
+    3: 'OFPFC_DELETE',
+    4: 'OFPFC_DELETE_STRICT',
+}
+
+# Identifiers from group ofp_flow_mod_failed_code
+OFPFMFC_UNKNOWN = 0
+OFPFMFC_TABLE_FULL = 1
+OFPFMFC_BAD_TABLE_ID = 2
+OFPFMFC_OVERLAP = 3
+OFPFMFC_EPERM = 4
+OFPFMFC_BAD_TIMEOUT = 5
+OFPFMFC_BAD_COMMAND = 6
+OFPFMFC_BAD_FLAGS = 7
+
+ofp_flow_mod_failed_code_map = {
+    0: 'OFPFMFC_UNKNOWN',
+    1: 'OFPFMFC_TABLE_FULL',
+    2: 'OFPFMFC_BAD_TABLE_ID',
+    3: 'OFPFMFC_OVERLAP',
+    4: 'OFPFMFC_EPERM',
+    5: 'OFPFMFC_BAD_TIMEOUT',
+    6: 'OFPFMFC_BAD_COMMAND',
+    7: 'OFPFMFC_BAD_FLAGS',
+}
+
+# Identifiers from group ofp_flow_mod_flags
+OFPFF_SEND_FLOW_REM = 1
+OFPFF_CHECK_OVERLAP = 2
+OFPFF_RESET_COUNTS = 4
+
+ofp_flow_mod_flags_map = {
+    1: 'OFPFF_SEND_FLOW_REM',
+    2: 'OFPFF_CHECK_OVERLAP',
+    4: 'OFPFF_RESET_COUNTS',
+}
+
+# Identifiers from group ofp_flow_removed_reason
+OFPRR_IDLE_TIMEOUT = 0
+OFPRR_HARD_TIMEOUT = 1
+OFPRR_DELETE = 2
+OFPRR_GROUP_DELETE = 3
+
+ofp_flow_removed_reason_map = {
+    0: 'OFPRR_IDLE_TIMEOUT',
+    1: 'OFPRR_HARD_TIMEOUT',
+    2: 'OFPRR_DELETE',
+    3: 'OFPRR_GROUP_DELETE',
+}
+
+# Identifiers from group ofp_group
+OFPG_MAX = 4294967040
+OFPG_ALL = 4294967292
+OFPG_ANY = 4294967295
+
+ofp_group_map = {
+    4294967040: 'OFPG_MAX',
+    4294967292: 'OFPG_ALL',
+    4294967295: 'OFPG_ANY',
+}
+
+# Identifiers from group ofp_group_capabilities
+OFPGFC_SELECT_WEIGHT = 1
+OFPGFC_SELECT_LIVENESS = 2
+OFPGFC_CHAINING = 4
+OFPGFC_CHAINING_CHECKS = 8
+
+ofp_group_capabilities_map = {
+    1: 'OFPGFC_SELECT_WEIGHT',
+    2: 'OFPGFC_SELECT_LIVENESS',
+    4: 'OFPGFC_CHAINING',
+    8: 'OFPGFC_CHAINING_CHECKS',
+}
+
+# Identifiers from group ofp_group_mod_command
+OFPGC_ADD = 0
+OFPGC_MODIFY = 1
+OFPGC_DELETE = 2
+
+ofp_group_mod_command_map = {
+    0: 'OFPGC_ADD',
+    1: 'OFPGC_MODIFY',
+    2: 'OFPGC_DELETE',
+}
+
+# Identifiers from group ofp_group_mod_failed_code
+OFPGMFC_GROUP_EXISTS = 0
+OFPGMFC_INVALID_GROUP = 1
+OFPGMFC_WEIGHT_UNSUPPORTED = 2
+OFPGMFC_OUT_OF_GROUPS = 3
+OFPGMFC_OUT_OF_BUCKETS = 4
+OFPGMFC_CHAINING_UNSUPPORTED = 5
+OFPGMFC_WATCH_UNSUPPORTED = 6
+OFPGMFC_LOOP = 7
+OFPGMFC_UNKNOWN_GROUP = 8
+OFPGMFC_CHAINED_GROUP = 9
+OFPGMFC_BAD_TYPE = 10
+OFPGMFC_BAD_COMMAND = 11
+OFPGMFC_BAD_BUCKET = 12
+OFPGMFC_BAD_WATCH = 13
+OFPGMFC_EPERM = 14
+
+ofp_group_mod_failed_code_map = {
+    0: 'OFPGMFC_GROUP_EXISTS',
+    1: 'OFPGMFC_INVALID_GROUP',
+    2: 'OFPGMFC_WEIGHT_UNSUPPORTED',
+    3: 'OFPGMFC_OUT_OF_GROUPS',
+    4: 'OFPGMFC_OUT_OF_BUCKETS',
+    5: 'OFPGMFC_CHAINING_UNSUPPORTED',
+    6: 'OFPGMFC_WATCH_UNSUPPORTED',
+    7: 'OFPGMFC_LOOP',
+    8: 'OFPGMFC_UNKNOWN_GROUP',
+    9: 'OFPGMFC_CHAINED_GROUP',
+    10: 'OFPGMFC_BAD_TYPE',
+    11: 'OFPGMFC_BAD_COMMAND',
+    12: 'OFPGMFC_BAD_BUCKET',
+    13: 'OFPGMFC_BAD_WATCH',
+    14: 'OFPGMFC_EPERM',
+}
+
+# Identifiers from group ofp_group_type
+OFPGT_ALL = 0
+OFPGT_SELECT = 1
+OFPGT_INDIRECT = 2
+OFPGT_FF = 3
+
+ofp_group_type_map = {
+    0: 'OFPGT_ALL',
+    1: 'OFPGT_SELECT',
+    2: 'OFPGT_INDIRECT',
+    3: 'OFPGT_FF',
+}
+
+# Identifiers from group ofp_hello_failed_code
+OFPHFC_INCOMPATIBLE = 0
+OFPHFC_EPERM = 1
+
+ofp_hello_failed_code_map = {
+    0: 'OFPHFC_INCOMPATIBLE',
+    1: 'OFPHFC_EPERM',
+}
+
+# Identifiers from group ofp_instruction_type
+OFPIT_GOTO_TABLE = 1
+OFPIT_WRITE_METADATA = 2
+OFPIT_WRITE_ACTIONS = 3
+OFPIT_APPLY_ACTIONS = 4
+OFPIT_CLEAR_ACTIONS = 5
+OFPIT_EXPERIMENTER = 65535
+
+ofp_instruction_type_map = {
+    1: 'OFPIT_GOTO_TABLE',
+    2: 'OFPIT_WRITE_METADATA',
+    3: 'OFPIT_WRITE_ACTIONS',
+    4: 'OFPIT_APPLY_ACTIONS',
+    5: 'OFPIT_CLEAR_ACTIONS',
+    65535: 'OFPIT_EXPERIMENTER',
+}
+
+# Identifiers from group ofp_match_type
+OFPMT_STANDARD = 0
+OFPMT_OXM = 1
+
+ofp_match_type_map = {
+    0: 'OFPMT_STANDARD',
+    1: 'OFPMT_OXM',
+}
+
+# Identifiers from group ofp_oxm_class
+OFPXMC_NXM_0 = 0
+OFPXMC_NXM_1 = 1
+OFPXMC_OPENFLOW_BASIC = 32768
+OFPXMC_EXPERIMENTER = 65535
+
+ofp_oxm_class_map = {
+    0: 'OFPXMC_NXM_0',
+    1: 'OFPXMC_NXM_1',
+    32768: 'OFPXMC_OPENFLOW_BASIC',
+    65535: 'OFPXMC_EXPERIMENTER',
+}
+
+# Identifiers from group ofp_packet_in_reason
+OFPR_NO_MATCH = 0
+OFPR_ACTION = 1
+OFPR_INVALID_TTL = 2
+
+ofp_packet_in_reason_map = {
+    0: 'OFPR_NO_MATCH',
+    1: 'OFPR_ACTION',
+    2: 'OFPR_INVALID_TTL',
+}
+
+# Identifiers from group ofp_port
+OFPP_MAX = 4294967040
+OFPP_IN_PORT = 4294967288
+OFPP_TABLE = 4294967289
+OFPP_NORMAL = 4294967290
+OFPP_FLOOD = 4294967291
+OFPP_ALL = 4294967292
+OFPP_CONTROLLER = 4294967293
+OFPP_LOCAL = 4294967294
+
+ofp_port_map = {
+    4294967040: 'OFPP_MAX',
+    4294967288: 'OFPP_IN_PORT',
+    4294967289: 'OFPP_TABLE',
+    4294967290: 'OFPP_NORMAL',
+    4294967291: 'OFPP_FLOOD',
+    4294967292: 'OFPP_ALL',
+    4294967293: 'OFPP_CONTROLLER',
+    4294967294: 'OFPP_LOCAL',
+}
+
+# Identifiers from group ofp_port_config
+OFPPC_PORT_DOWN = 1
+OFPPC_NO_RECV = 4
+OFPPC_NO_FWD = 32
+OFPPC_NO_PACKET_IN = 64
+
+ofp_port_config_map = {
+    1: 'OFPPC_PORT_DOWN',
+    4: 'OFPPC_NO_RECV',
+    32: 'OFPPC_NO_FWD',
+    64: 'OFPPC_NO_PACKET_IN',
+}
+
+# Identifiers from group ofp_port_features
+OFPPF_10MB_HD = 1
+OFPPF_10MB_FD = 2
+OFPPF_100MB_HD = 4
+OFPPF_100MB_FD = 8
+OFPPF_1GB_HD = 16
+OFPPF_1GB_FD = 32
+OFPPF_10GB_FD = 64
+OFPPF_40GB_FD = 128
+OFPPF_100GB_FD = 256
+OFPPF_1TB_FD = 512
+OFPPF_OTHER = 1024
+OFPPF_COPPER = 2048
+OFPPF_FIBER = 4096
+OFPPF_AUTONEG = 8192
+OFPPF_PAUSE = 16384
+OFPPF_PAUSE_ASYM = 32768
+
+ofp_port_features_map = {
+    1: 'OFPPF_10MB_HD',
+    2: 'OFPPF_10MB_FD',
+    4: 'OFPPF_100MB_HD',
+    8: 'OFPPF_100MB_FD',
+    16: 'OFPPF_1GB_HD',
+    32: 'OFPPF_1GB_FD',
+    64: 'OFPPF_10GB_FD',
+    128: 'OFPPF_40GB_FD',
+    256: 'OFPPF_100GB_FD',
+    512: 'OFPPF_1TB_FD',
+    1024: 'OFPPF_OTHER',
+    2048: 'OFPPF_COPPER',
+    4096: 'OFPPF_FIBER',
+    8192: 'OFPPF_AUTONEG',
+    16384: 'OFPPF_PAUSE',
+    32768: 'OFPPF_PAUSE_ASYM',
+}
+
+# Identifiers from group ofp_port_mod_failed_code
+OFPPMFC_BAD_PORT = 0
+OFPPMFC_BAD_HW_ADDR = 1
+OFPPMFC_BAD_CONFIG = 2
+OFPPMFC_BAD_ADVERTISE = 3
+OFPPMFC_EPERM = 4
+
+ofp_port_mod_failed_code_map = {
+    0: 'OFPPMFC_BAD_PORT',
+    1: 'OFPPMFC_BAD_HW_ADDR',
+    2: 'OFPPMFC_BAD_CONFIG',
+    3: 'OFPPMFC_BAD_ADVERTISE',
+    4: 'OFPPMFC_EPERM',
+}
+
+# Identifiers from group ofp_port_no
+OFPP_ANY = 4294967295
+
+ofp_port_no_map = {
+    4294967295: 'OFPP_ANY',
+}
+
+# Identifiers from group ofp_port_reason
+OFPPR_ADD = 0
+OFPPR_DELETE = 1
+OFPPR_MODIFY = 2
+
+ofp_port_reason_map = {
+    0: 'OFPPR_ADD',
+    1: 'OFPPR_DELETE',
+    2: 'OFPPR_MODIFY',
+}
+
+# Identifiers from group ofp_port_state
+OFPPS_LINK_DOWN = 1
+OFPPS_BLOCKED = 2
+OFPPS_LIVE = 4
+
+ofp_port_state_map = {
+    1: 'OFPPS_LINK_DOWN',
+    2: 'OFPPS_BLOCKED',
+    4: 'OFPPS_LIVE',
+}
+
+# Identifiers from group ofp_queue_op_failed_code
+OFPQOFC_BAD_PORT = 0
+OFPQOFC_BAD_QUEUE = 1
+OFPQOFC_EPERM = 2
+
+ofp_queue_op_failed_code_map = {
+    0: 'OFPQOFC_BAD_PORT',
+    1: 'OFPQOFC_BAD_QUEUE',
+    2: 'OFPQOFC_EPERM',
+}
+
+# Identifiers from group ofp_queue_properties
+OFPQT_MIN_RATE = 1
+OFPQT_MAX_RATE = 2
+OFPQT_EXPERIMENTER = 65535
+
+ofp_queue_properties_map = {
+    1: 'OFPQT_MIN_RATE',
+    2: 'OFPQT_MAX_RATE',
+    65535: 'OFPQT_EXPERIMENTER',
+}
+
+# Identifiers from group ofp_role_request_failed_code
+OFPRRFC_STALE = 0
+OFPRRFC_UNSUP = 1
+OFPRRFC_BAD_ROLE = 2
+
+ofp_role_request_failed_code_map = {
+    0: 'OFPRRFC_STALE',
+    1: 'OFPRRFC_UNSUP',
+    2: 'OFPRRFC_BAD_ROLE',
+}
+
+# Identifiers from group ofp_stats_reply_flags
+OFPSF_REPLY_MORE = 1
+
+ofp_stats_reply_flags_map = {
+    1: 'OFPSF_REPLY_MORE',
+}
+
+# Identifiers from group ofp_stats_types
+OFPST_DESC = 0
+OFPST_FLOW = 1
+OFPST_AGGREGATE = 2
+OFPST_TABLE = 3
+OFPST_PORT = 4
+OFPST_QUEUE = 5
+OFPST_GROUP = 6
+OFPST_GROUP_DESC = 7
+OFPST_GROUP_FEATURES = 8
+OFPST_EXPERIMENTER = 65535
+
+ofp_stats_types_map = {
+    0: 'OFPST_DESC',
+    1: 'OFPST_FLOW',
+    2: 'OFPST_AGGREGATE',
+    3: 'OFPST_TABLE',
+    4: 'OFPST_PORT',
+    5: 'OFPST_QUEUE',
+    6: 'OFPST_GROUP',
+    7: 'OFPST_GROUP_DESC',
+    8: 'OFPST_GROUP_FEATURES',
+    65535: 'OFPST_EXPERIMENTER',
+}
+
+# Identifiers from group ofp_switch_config_failed_code
+OFPSCFC_BAD_FLAGS = 0
+OFPSCFC_BAD_LEN = 1
+OFPSCFC_EPERM = 2
+
+ofp_switch_config_failed_code_map = {
+    0: 'OFPSCFC_BAD_FLAGS',
+    1: 'OFPSCFC_BAD_LEN',
+    2: 'OFPSCFC_EPERM',
+}
+
+# Identifiers from group ofp_table
+OFPTT_MAX = 254
+OFPTT_ALL = 255
+
+ofp_table_map = {
+    254: 'OFPTT_MAX',
+    255: 'OFPTT_ALL',
+}
+
+# Identifiers from group ofp_table_config
+OFPTC_TABLE_MISS_CONTROLLER = 0
+OFPTC_TABLE_MISS_CONTINUE = 1
+OFPTC_TABLE_MISS_DROP = 2
+OFPTC_TABLE_MISS_MASK = 3
+
+ofp_table_config_map = {
+    0: 'OFPTC_TABLE_MISS_CONTROLLER',
+    1: 'OFPTC_TABLE_MISS_CONTINUE',
+    2: 'OFPTC_TABLE_MISS_DROP',
+    3: 'OFPTC_TABLE_MISS_MASK',
+}
+
+# Identifiers from group ofp_table_mod_failed_code
+OFPTMFC_BAD_TABLE = 0
+OFPTMFC_BAD_CONFIG = 1
+OFPTMFC_EPERM = 2
+
+ofp_table_mod_failed_code_map = {
+    0: 'OFPTMFC_BAD_TABLE',
+    1: 'OFPTMFC_BAD_CONFIG',
+    2: 'OFPTMFC_EPERM',
+}
+
+# Identifiers from group ofp_type
+OFPT_HELLO = 0
+OFPT_ERROR = 1
+OFPT_ECHO_REQUEST = 2
+OFPT_ECHO_REPLY = 3
+OFPT_EXPERIMENTER = 4
+OFPT_FEATURES_REQUEST = 5
+OFPT_FEATURES_REPLY = 6
+OFPT_GET_CONFIG_REQUEST = 7
+OFPT_GET_CONFIG_REPLY = 8
+OFPT_SET_CONFIG = 9
+OFPT_PACKET_IN = 10
+OFPT_FLOW_REMOVED = 11
+OFPT_PORT_STATUS = 12
+OFPT_PACKET_OUT = 13
+OFPT_FLOW_MOD = 14
+OFPT_GROUP_MOD = 15
+OFPT_PORT_MOD = 16
+OFPT_TABLE_MOD = 17
+OFPT_STATS_REQUEST = 18
+OFPT_STATS_REPLY = 19
+OFPT_BARRIER_REQUEST = 20
+OFPT_BARRIER_REPLY = 21
+OFPT_QUEUE_GET_CONFIG_REQUEST = 22
+OFPT_QUEUE_GET_CONFIG_REPLY = 23
+OFPT_ROLE_REQUEST = 24
+OFPT_ROLE_REPLY = 25
+
+ofp_type_map = {
+    0: 'OFPT_HELLO',
+    1: 'OFPT_ERROR',
+    2: 'OFPT_ECHO_REQUEST',
+    3: 'OFPT_ECHO_REPLY',
+    4: 'OFPT_EXPERIMENTER',
+    5: 'OFPT_FEATURES_REQUEST',
+    6: 'OFPT_FEATURES_REPLY',
+    7: 'OFPT_GET_CONFIG_REQUEST',
+    8: 'OFPT_GET_CONFIG_REPLY',
+    9: 'OFPT_SET_CONFIG',
+    10: 'OFPT_PACKET_IN',
+    11: 'OFPT_FLOW_REMOVED',
+    12: 'OFPT_PORT_STATUS',
+    13: 'OFPT_PACKET_OUT',
+    14: 'OFPT_FLOW_MOD',
+    15: 'OFPT_GROUP_MOD',
+    16: 'OFPT_PORT_MOD',
+    17: 'OFPT_TABLE_MOD',
+    18: 'OFPT_STATS_REQUEST',
+    19: 'OFPT_STATS_REPLY',
+    20: 'OFPT_BARRIER_REQUEST',
+    21: 'OFPT_BARRIER_REPLY',
+    22: 'OFPT_QUEUE_GET_CONFIG_REQUEST',
+    23: 'OFPT_QUEUE_GET_CONFIG_REPLY',
+    24: 'OFPT_ROLE_REQUEST',
+    25: 'OFPT_ROLE_REPLY',
+}
+
+# Identifiers from group ofp_vlan_id
+OFPVID_NONE = 0
+OFPVID_PRESENT = 4096
+
+ofp_vlan_id_map = {
+    0: 'OFPVID_NONE',
+    4096: 'OFPVID_PRESENT',
+}
+