diff --git a/experiments/netconf/proto2yang/adapter_orig.proto b/experiments/netconf/proto2yang/adapter_orig.proto
deleted file mode 100644
index 4af54c3..0000000
--- a/experiments/netconf/proto2yang/adapter_orig.proto
+++ /dev/null
@@ -1,41 +0,0 @@
-syntax = "proto3";
-
-package voltha;
-
-import "google/protobuf/any.proto";
-import "common.proto";
-import "meta.proto";
-
-
-message AdapterConfig {
-
-    // Common adapter config attributes here
-    LogLevel.LogLevel log_level = 1;
-
-    // Custom (vendor-specific) configuration attributes
-    google.protobuf.Any additional_config = 64;
-
-}
-
-// Adapter (software plugin)
-message Adapter {
-
-    // Unique name of adapter, matching the python packate name under
-    // voltha/adapters.
-    string id = 1 [(access) = READ_ONLY];
-    string vendor = 2 [(access) = READ_ONLY];
-    string version = 3 [(access) = READ_ONLY];
-
-    // Adapter configuration
-    AdapterConfig config = 16;
-
-    // Custom descriptors and custom configuration
-    google.protobuf.Any additional_description = 64 [(access) = READ_ONLY];
-
-    repeated string logical_device_ids = 4;  // Logical devices "owned"
-
-}
-
-message Adapters {
-    repeated Adapter items = 1;
-}
diff --git a/experiments/netconf/proto2yang/common_orig.proto b/experiments/netconf/proto2yang/common_orig.proto
deleted file mode 100644
index 1497d56..0000000
--- a/experiments/netconf/proto2yang/common_orig.proto
+++ /dev/null
@@ -1,81 +0,0 @@
-syntax = "proto3";
-
-package voltha;
-
-// Convey a resource identifier
-message ID {
-    string id = 1;
-}
-
-message LogLevel {
-
-    // Logging verbosity level
-    enum LogLevel {
-        DEBUG = 0;
-        INFO = 1;
-        WARNING = 2;
-        ERROR = 3;
-        CRITICAL = 4;
-    }
-}
-
-message AdminState {
-
-    // Administrative State
-    enum AdminState {
-
-        // The administrative state of the device is unknown
-        UNKNOWN = 0;
-
-        // The device is pre-provisioned into Voltha, but not contacted by it
-        PREPROVISIONED = 1;
-
-        // The device is enabled for activation and operation
-        ENABLED = 3;
-
-        // The device is disabled and shall not perform its intended forwarding
-        // functions other than being available for re-activation.
-        DISABLED = 2;
-    }
-}
-
-message OperStatus {
-
-    // Operational Status
-    enum OperStatus {
-
-        // The status of the device is unknown at this point
-        UNKNOWN = 0;
-
-        // The device has been discovered, but not yet activated
-        DISCOVERED = 1;
-
-        // The device is being activated (booted, rebooted, upgraded, etc.)
-        ACTIVATING = 2;
-
-        // Service impacting tests are being conducted
-        TESTING = 3;
-
-        // The device is up and active
-        ACTIVE = 4;
-
-        // The device has failed and cannot fulfill its intended role
-        FAILED = 5;
-    }
-}
-
-message ConnectStatus {
-
-    // Connectivity Status
-    enum ConnectStatus {
-
-        // The device connectivity status is unknown
-        UNKNOWN = 0;
-
-        // The device cannot be reached by Voltha
-        UNREACHABLE = 1;
-
-        // There is live communication between device and Voltha
-        REACHABLE = 2;
-    }
-}
diff --git a/experiments/netconf/proto2yang/device.proto b/experiments/netconf/proto2yang/device.proto
index ac0f7e7..4fc261f 100644
--- a/experiments/netconf/proto2yang/device.proto
+++ b/experiments/netconf/proto2yang/device.proto
@@ -110,7 +110,7 @@
         // ("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx")
         string ipv6_address = 15;
 
-        ProxyAddress proxy_device = 19;
+        ProxyAddress proxy_address = 19;
     };
 
     AdminState admin_state = 16;
diff --git a/experiments/netconf/proto2yang/device_orig.proto b/experiments/netconf/proto2yang/device_orig.proto
deleted file mode 100644
index 0a1e9b2..0000000
--- a/experiments/netconf/proto2yang/device_orig.proto
+++ /dev/null
@@ -1,135 +0,0 @@
-syntax = "proto3";
-
-package voltha;
-
-import "meta.proto";
-import "google/protobuf/any.proto";
-import "common.proto";
-import "openflow_13.proto";
-
-// A Device Type
-message DeviceType {
-
-    // Unique name for the device type
-    string id = 1;
-
-    // Name of the adapter that handles device type
-    string adapter = 2;
-
-    // Capabilitities
-
-    bool accepts_bulk_flow_update = 3;
-    bool accepts_add_remove_flow_updates = 4;
-
-}
-
-// A plurality of device types
-message DeviceTypes {
-    repeated DeviceType items = 1;
-}
-
-message Port {
-
-    enum PortType {
-        UNKNOWN = 0;
-        ETHERNET_NNI = 1;
-        ETHERNET_UNI = 2;
-        PON_OLT = 3;
-        PON_ONU = 4;
-    }
-
-    uint32 port_no = 1;  // Device-unique port number
-
-    string label = 2;  // Arbitrary port label
-
-    PortType type = 3;  //  Type of port
-
-    AdminState.AdminState admin_state = 5;
-
-    OperStatus.OperStatus oper_status = 6;
-
-    string device_id = 7;  // Unique .id of device that owns this port
-
-    message PeerPort {
-        string device_id = 1;
-        uint32 port_no = 2;
-    }
-    repeated PeerPort peers = 8;
-
-}
-
-message Ports {
-    repeated Port items = 1;
-}
-
-// A Physical Device instance
-message Device {
-
-    // Voltha's device identifier
-    string id = 1 [(access) = READ_ONLY];
-
-    // Device type, refers to one of the registered device types
-    string type = 2 [(access) = READ_ONLY];
-
-    // Is this device a root device. Each logical switch has one root
-    // device that is associated with the logical flow switch.
-    bool root = 3 [(access) = READ_ONLY];
-
-    // Parent device id, in the device tree (for a root device, the parent_id
-    // is the logical_device.id)
-    string parent_id = 4 [(access) = READ_ONLY];
-    uint32 parent_port_no = 20 [(access) = READ_ONLY];
-
-    // Vendor, version, serial number, etc.
-    string vendor = 5 [(access) = READ_ONLY];
-    string model = 6 [(access) = READ_ONLY];
-    string hardware_version = 7 [(access) = READ_ONLY];
-    string firmware_version = 8 [(access) = READ_ONLY];
-    string software_version = 9 [(access) = READ_ONLY];
-    string serial_number = 10 [(access) = READ_ONLY];
-
-    // Addapter that takes care of device
-    string adapter = 11 [(access) = READ_ONLY];
-
-    // Device contact on vlan (if 0, no vlan)
-    uint32 vlan = 12;
-
-    message ProxyAddress {
-        string device_id = 1;  // Which device to use as proxy to this device
-        uint32 channel_id = 2;  // Sub-address within proxy device
-    };
-
-    oneof address {
-        // Device contact MAC address (format: "xx:xx:xx:xx:xx:xx")
-        string mac_address = 13;
-
-        // Device contact IPv4 address (format: "a.b.c.d" or can use hostname too)
-        string ipv4_address = 14;
-
-        // Device contact IPv6 address using the canonical string form
-        // ("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx")
-        string ipv6_address = 15;
-
-        ProxyAddress proxy_device = 19;
-    };
-
-    AdminState.AdminState admin_state = 16;
-
-    OperStatus.OperStatus oper_status = 17 [(access) = READ_ONLY];
-
-    ConnectStatus.ConnectStatus connect_status = 18 [(access) = READ_ONLY];
-
-    // TODO additional common attribute here
-
-    // Device type specific attributes
-    google.protobuf.Any custom = 64;
-
-    repeated Port ports = 128  [(child_node) = {key: "port_no"}];
-    openflow_13.Flows flows = 129 [(child_node) = {}];
-    openflow_13.FlowGroups flow_groups = 130 [(child_node) = {}];
-
-}
-
-message Devices {
-    repeated Device items = 1;
-}
diff --git a/experiments/netconf/proto2yang/ietf-meta.yang b/experiments/netconf/proto2yang/ietf-meta.yang
index 92a480a..05fff41 100644
--- a/experiments/netconf/proto2yang/ietf-meta.yang
+++ b/experiments/netconf/proto2yang/ietf-meta.yang
@@ -26,6 +26,9 @@
             enum READ_ONLY {
                 description "";
             }
+            enum REAL_TIME {
+                description "";
+            }
         }
         description
             "";
diff --git a/experiments/netconf/proto2yang/meta.proto b/experiments/netconf/proto2yang/meta.proto
index d16668a..b78c9e3 100644
--- a/experiments/netconf/proto2yang/meta.proto
+++ b/experiments/netconf/proto2yang/meta.proto
@@ -26,8 +26,17 @@
 }
 
 enum Access {
-    CONFIG = 0;  // read-write, stored
-    READ_ONLY = 1;      // read-only field
+
+    // read-write, stored attribute
+    CONFIG = 0;
+
+    // read-only field, stored with the model, covered by its hash
+    READ_ONLY = 1;
+
+    // A read-only attribute that is not stored in the model, not covered
+    // by its hash, its value is filled real-time upon each request.
+    REAL_TIME = 2;
+
 }
 
 extend google.protobuf.FieldOptions {
diff --git a/experiments/netconf/proto2yang/openflow_13.proto b/experiments/netconf/proto2yang/openflow_13.proto
index 0e403fd..c99cd5d 100644
--- a/experiments/netconf/proto2yang/openflow_13.proto
+++ b/experiments/netconf/proto2yang/openflow_13.proto
@@ -2029,7 +2029,7 @@
     ofp_group_type type = 1;       /* One of OFPGT_*. */
     uint32 group_id = 2;           /* Group identifier. */
     repeated ofp_bucket buckets = 3;   /* List of buckets - 0 or more. */
-    /* ofp_group_desc desc = 1; */
+//    ofp_group_desc desc = 1;
     ofp_group_stats stats = 4;
 };
 
diff --git a/experiments/netconf/proto2yang/openflow_13_orig.proto b/experiments/netconf/proto2yang/openflow_13_orig.proto
deleted file mode 100644
index 01b5059..0000000
--- a/experiments/netconf/proto2yang/openflow_13_orig.proto
+++ /dev/null
@@ -1,2275 +0,0 @@
-/* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
- * Junior University
- * Copyright (c) 2011, 2012 Open Networking Foundation
- *
- * 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.
- */
-
-/* OpenFlow: protocol between controller and datapath. */
-
-/*
- * This is a relatively straightforward rendering of OpenFlow message
- * definitions into protocol buffer messages. We preserved the snake
- * case syntax, and made the following changes:
- * - all pad fields dropped
- * - for each enum value above 0x7fffffff the MSB is dropped. For example,
- *   0xffffffff is now 0x7fffffff.
- * - '<type> thing[...]' is replaced with 'repeated <type> thing'
- * - 'char thing[...]' is replaced with 'string thing'
- * - 'uint8_t data[...]' is replaced with 'bytes data'
- * - the following systematic changes are done to various integer types:
- *   uint8_t  -> uint32
- *   uint16_t -> uint32
- *   uint32_t -> uint32
- *   uint64_t -> uint64
- * - removed most length, len, size fields where these values can be determined
- *   from the explicitly encoded length of "repeated" protobuf fields.
- * - explicit use of enum types whereever it is unambigous (and not used as
- *   bitmask/flags value.
- *
- */
-syntax = "proto3";
-
-package openflow_13;
-
-
-/* Version number:
- * OpenFlow versions released: 0x01 = 1.0 ; 0x02 = 1.1 ; 0x03 = 1.2
- *     0x04 = 1.3
- */
-/* The most significant bit in the version field is reserved and must
- * be set to zero.
- */
-//#define OFP_VERSION   0x04
-//#define PIPELINE_TABLES 64
-//#define OFP_MAX_TABLE_NAME_LEN 32
-//#define OFP_MAX_PORT_NAME_LEN  16
-/* Official IANA registered port for OpenFlow. */
-//#define OFP_TCP_PORT  6653
-//#define OFP_SSL_PORT  6653
-
-//#define OFP_ETH_ALEN 6          /* Bytes in an Ethernet address. */
-
-/* Port numbering. Ports are numbered starting from 1. */
-enum ofp_port_no {
-    OFPP_INVALID    = 0;
-
-    /* Maximum number of physical and logical switch ports. */
-    OFPP_MAX        = 0x7fffff00;
-
-    /* Reserved OpenFlow Port (fake output "ports"). */
-    OFPP_IN_PORT    = 0x7ffffff8;  /* Send the packet out the input port.  This
-                                      reserved port must be explicitly used
-                                      in order to send back out of the input
-                                      port. */
-    OFPP_TABLE      = 0x7ffffff9;  /* Submit the packet to the first flow table
-                                      NB: This destination port can only be
-                                      used in packet-out messages. */
-    OFPP_NORMAL     = 0x7ffffffa;  /* Forward using non-OpenFlow pipeline. */
-    OFPP_FLOOD      = 0x7ffffffb;  /* Flood using non-OpenFlow pipeline. */
-    OFPP_ALL        = 0x7ffffffc;  /* All standard ports except input port. */
-    OFPP_CONTROLLER = 0x7ffffffd;  /* Send to controller. */
-    OFPP_LOCAL      = 0x7ffffffe;  /* Local openflow "port". */
-    OFPP_ANY        = 0x7fffffff;  /* Special value used in some requests when
-                                      no port is specified (i.e. wildcarded).*/
-};
-
-enum ofp_type {
-
-    /* Immutable messages. */
-    OFPT_HELLO                      = 0;  /* Symmetric message */
-    OFPT_ERROR                      = 1;  /* Symmetric message */
-    OFPT_ECHO_REQUEST               = 2;  /* Symmetric message */
-    OFPT_ECHO_REPLY                 = 3;  /* Symmetric message */
-    OFPT_EXPERIMENTER               = 4;  /* Symmetric message */
-
-    /* Switch configuration messages. */
-    OFPT_FEATURES_REQUEST           = 5;  /* Controller/switch message */
-    OFPT_FEATURES_REPLY             = 6;  /* Controller/switch message */
-    OFPT_GET_CONFIG_REQUEST         = 7;  /* Controller/switch message */
-    OFPT_GET_CONFIG_REPLY           = 8;  /* Controller/switch message */
-    OFPT_SET_CONFIG                 = 9;  /* Controller/switch message */
-
-    /* Asynchronous messages. */
-    OFPT_PACKET_IN                  = 10; /* Async message */
-    OFPT_FLOW_REMOVED               = 11; /* Async message */
-    OFPT_PORT_STATUS                = 12; /* Async message */
-
-    /* Controller command messages. */
-    OFPT_PACKET_OUT                 = 13; /* Controller/switch message */
-    OFPT_FLOW_MOD                   = 14; /* Controller/switch message */
-    OFPT_GROUP_MOD                  = 15; /* Controller/switch message */
-    OFPT_PORT_MOD                   = 16; /* Controller/switch message */
-    OFPT_TABLE_MOD                  = 17; /* Controller/switch message */
-
-    /* Multipart messages. */
-    OFPT_MULTIPART_REQUEST          = 18; /* Controller/switch message */
-    OFPT_MULTIPART_REPLY            = 19; /* Controller/switch message */
-
-    /* Barrier messages. */
-    OFPT_BARRIER_REQUEST            = 20; /* Controller/switch message */
-    OFPT_BARRIER_REPLY              = 21; /* Controller/switch message */
-
-    /* Queue Configuration messages. */
-    OFPT_QUEUE_GET_CONFIG_REQUEST   = 22;  /* Controller/switch message */
-    OFPT_QUEUE_GET_CONFIG_REPLY     = 23;  /* Controller/switch message */
-
-    /* Controller role change request messages. */
-    OFPT_ROLE_REQUEST               = 24; /* Controller/switch message */
-    OFPT_ROLE_REPLY                 = 25; /* Controller/switch message */
-
-    /* Asynchronous message configuration. */
-    OFPT_GET_ASYNC_REQUEST          = 26; /* Controller/switch message */
-    OFPT_GET_ASYNC_REPLY            = 27; /* Controller/switch message */
-    OFPT_SET_ASYNC                  = 28; /* Controller/switch message */
-
-    /* Meters and rate limiters configuration messages. */
-    OFPT_METER_MOD                  = 29; /* Controller/switch message */
-};
-
-/* Header on all OpenFlow packets. */
-message ofp_header {
-    uint32 version = 1;    /* OFP_VERSION. */
-    ofp_type type = 2;     /* One of the OFPT_ constants. */
-    uint32 xid = 3;        /* Transaction id associated with this packet.
-                              Replies use the same id as was in the request
-                              to facilitate pairing. */
-};
-
-/* Hello elements types.
- */
-enum ofp_hello_elem_type {
-    OFPHET_INVALID                = 0;
-    OFPHET_VERSIONBITMAP          = 1;  /* Bitmap of version supported. */
-};
-
-/* Common header for all Hello Elements */
-message ofp_hello_elem_header {
-    ofp_hello_elem_type type = 1;       /* One of OFPHET_*. */
-    oneof element {
-        ofp_hello_elem_versionbitmap versionbitmap = 2;
-    }
-};
-
-/* Version bitmap Hello Element */
-message ofp_hello_elem_versionbitmap {
-    repeated uint32 bitmaps = 2;   /* List of bitmaps - supported versions */
-};
-
-/* OFPT_HELLO.  This message includes zero or more hello elements having
- * variable size. Unknown elements types must be ignored/skipped, to allow
- * for future extensions. */
-message ofp_hello {
-    //ofp_header header;
-    /* Hello element list */
-    repeated ofp_hello_elem_header elements = 1; /* 0 or more */
-};
-
-//#define OFP_DEFAULT_MISS_SEND_LEN   128
-
-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_MASK     = 3;       /* Bitmask of flags dealing with frag. */
-};
-
-/* Switch configuration. */
-message ofp_switch_config {
-    //ofp_header header;
-    uint32 flags = 1;             /* Bitmap of OFPC_* flags. */
-    uint32 miss_send_len = 2;     /* Max bytes of packet that datapath
-                                     should send to the controller. See
-                                     ofp_controller_max_len for valid values.
-                                   */
-};
-
-/* Flags to configure the table. Reserved for future use. */
-enum ofp_table_config {
-    OFPTC_INVALID = 0;
-    OFPTC_DEPRECATED_MASK = 3;     /* Deprecated bits */
-};
-
-/* Table numbering. Tables can use any number up to OFPT_MAX. */
-enum ofp_table {
-
-    OFPTT_INVALID = 0;
-
-    /* Last usable table number. */
-    OFPTT_MAX        = 0xfe;
-
-    /* Fake tables. */
-    OFPTT_ALL        = 0xff;   /* Wildcard table used for table config,
-                                  flow stats and flow deletes. */
-};
-
-
-/* Configure/Modify behavior of a flow table */
-message ofp_table_mod {
-    //ofp_header header;
-    uint32 table_id = 1;  /* ID of the table, OFPTT_ALL indicates all tables */
-    uint32 config = 2;    /* Bitmap of OFPTC_* flags */
-};
-
-/* Capabilities supported by the datapath. */
-enum ofp_capabilities {
-    OFPC_INVALID        = 0;
-    OFPC_FLOW_STATS     = 1;    /* Flow statistics. */
-    OFPC_TABLE_STATS    = 2;    /* Table statistics. */
-    OFPC_PORT_STATS     = 4;    /* Port statistics. */
-    OFPC_GROUP_STATS    = 8;    /* Group statistics. */
-    OFPC_IP_REASM       = 32;   /* Can reassemble IP fragments. */
-    OFPC_QUEUE_STATS    = 64;   /* Queue statistics. */
-    OFPC_PORT_BLOCKED   = 256;  /* Switch will block looping ports. */
-};
-
-/* 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_INVALID      = 0;
-    OFPPC_PORT_DOWN    = 1;   /* Port is administratively down. */
-
-    OFPPC_NO_RECV      = 4;   /* Drop all packets received by port. */
-    OFPPC_NO_FWD       = 32;  /* Drop packets forwarded to port. */
-    OFPPC_NO_PACKET_IN = 64;  /* Do not send packet-in msgs for port. */
-};
-
-/* Current state of the physical port.  These are not configurable from
- * the controller.
- */
-enum ofp_port_state {
-    OFPPS_INVALID      = 0;
-    OFPPS_LINK_DOWN    = 1;  /* No physical link present. */
-    OFPPS_BLOCKED      = 2;  /* Port is blocked */
-    OFPPS_LIVE         = 4;  /* Live for Fast Failover Group. */
-};
-
-/* Features of ports available in a datapath. */
-enum ofp_port_features {
-    OFPPF_INVALID    = 0;
-    OFPPF_10MB_HD    = 1;      /* 10 Mb half-duplex rate support. */
-    OFPPF_10MB_FD    = 2;      /* 10 Mb full-duplex rate support. */
-    OFPPF_100MB_HD   = 4;      /* 100 Mb half-duplex rate support. */
-    OFPPF_100MB_FD   = 8;      /* 100 Mb full-duplex rate support. */
-    OFPPF_1GB_HD     = 16;     /* 1 Gb half-duplex rate support. */
-    OFPPF_1GB_FD     = 32;     /* 1 Gb full-duplex rate support. */
-    OFPPF_10GB_FD    = 64;     /* 10 Gb full-duplex rate support. */
-    OFPPF_40GB_FD    = 128;    /* 40 Gb full-duplex rate support. */
-    OFPPF_100GB_FD   = 256;    /* 100 Gb full-duplex rate support. */
-    OFPPF_1TB_FD     = 512;    /* 1 Tb full-duplex rate support. */
-    OFPPF_OTHER      = 1024;   /* Other rate, not in the list. */
-    OFPPF_COPPER     = 2048;   /* Copper medium. */
-    OFPPF_FIBER      = 4096;   /* Fiber medium. */
-    OFPPF_AUTONEG    = 8192;   /* Auto-negotiation. */
-    OFPPF_PAUSE      = 16384;  /* Pause. */
-    OFPPF_PAUSE_ASYM = 32768;  /* Asymmetric pause. */
-};
-
-/* Description of a port */
-message ofp_port {
-    uint32 port_no = 1;
-    repeated uint32 hw_addr = 2; // [OFP_ETH_ALEN];
-    string name = 3;             /* Null-terminated */
-
-    uint32 config = 4;           /* Bitmap of OFPPC_* flags. */
-    uint32 state = 5;            /* Bitmap of OFPPS_* flags. */
-
-    /* Bitmaps of OFPPF_* that describe features.  All bits zeroed if
-     * unsupported or unavailable. */
-    uint32 curr = 6;           /* Current features. */
-    uint32 advertised = 7;     /* Features being advertised by the port. */
-    uint32 supported = 8;      /* Features supported by the port. */
-    uint32 peer = 9;           /* Features advertised by peer. */
-    uint32 curr_speed = 10;    /* Current port bitrate in kbps. */
-    uint32 max_speed = 11;     /* Max port bitrate in kbps */
-};
-
-/* Switch features. */
-message ofp_switch_features {
-    //ofp_header header;
-    uint64 datapath_id = 1;   /* Datapath unique ID.  The lower 48-bits are for
-                                 a MAC address, while the upper 16-bits are
-                                 implementer-defined. */
-
-    uint32 n_buffers = 2;     /* Max packets buffered at once. */
-
-    uint32 n_tables = 3;      /* Number of tables supported by datapath. */
-    uint32 auxiliary_id = 4;  /* Identify auxiliary connections */
-
-    /* Features. */
-    uint32 capabilities = 5;  /* Bitmap of support "ofp_capabilities". */
-};
-
-/* What changed about the physical port */
-enum ofp_port_reason {
-    OFPPR_ADD     = 0;         /* The port was added. */
-    OFPPR_DELETE  = 1;         /* The port was removed. */
-    OFPPR_MODIFY  = 2;         /* Some attribute of the port has changed. */
-};
-
-/* A physical port has changed in the datapath */
-message ofp_port_status {
-    //ofp_header header;
-    ofp_port_reason reason = 1; /* One of OFPPR_*. */
-    ofp_port desc = 2;
-};
-
-/* Modify behavior of the physical port */
-message ofp_port_mod {
-    //ofp_header header;
-    uint32 port_no = 1;
-    repeated uint32 hw_addr = 2; //[OFP_ETH_ALEN];
-                                      /* The hardware address is not
-                                         configurable.  This is used to
-                                         sanity-check the request, so it must
-                                         be the same as returned in an
-                                         ofp_port struct. */
-    uint32 config = 3;        /* Bitmap of OFPPC_* flags. */
-    uint32 mask = 4;          /* Bitmap of OFPPC_* flags to be changed. */
-
-    uint32 advertise = 5;     /* Bitmap of OFPPF_*.  Zero all bits to prevent
-                                 any action taking place. */
-};
-
-/* ## -------------------------- ## */
-/* ## OpenFlow Extensible Match. ## */
-/* ## -------------------------- ## */
-
-/* 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;       /* Deprecated. */
-    OFPMT_OXM      = 1;       /* OpenFlow Extensible Match */
-};
-
-/* Fields to match against flows */
-message ofp_match {
-    ofp_match_type type = 1;         /* One of OFPMT_* */
-    repeated ofp_oxm_field oxm_fields = 2;  /* 0 or more */
-};
-
-/* Components of a OXM TLV header.
- * Those macros are not valid for the experimenter class, macros for the
- * experimenter class will depend on the experimenter header used. */
-//#define OXM_HEADER__(CLASS, FIELD, HASMASK, LENGTH) \
-//    (((CLASS) << 16) | ((FIELD) << 9) | ((HASMASK) << 8) | (LENGTH))
-//#define OXM_HEADER(CLASS, FIELD, LENGTH) \
-//    OXM_HEADER__(CLASS, FIELD, 0, LENGTH)
-//#define OXM_HEADER_W(CLASS, FIELD, LENGTH) \
-//    OXM_HEADER__(CLASS, FIELD, 1, (LENGTH) * 2)
-//#define OXM_CLASS(HEADER) ((HEADER) >> 16)
-//#define OXM_FIELD(HEADER) (((HEADER) >> 9) & 0x7f)
-//#define OXM_TYPE(HEADER) (((HEADER) >> 9) & 0x7fffff)
-//#define OXM_HASMASK(HEADER) (((HEADER) >> 8) & 1)
-//#define OXM_LENGTH(HEADER) ((HEADER) & 0xff)
-//
-//#define OXM_MAKE_WILD_HEADER(HEADER) \
-//    OXM_HEADER_W(OXM_CLASS(HEADER), OXM_FIELD(HEADER), OXM_LENGTH(HEADER))
-
-/* OXM Class IDs.
- * The high order bit differentiate reserved classes from member classes.
- * Classes 0x0000 to 0x7FFF are member classes, allocated by ONF.
- * Classes 0x8000 to 0xFFFE are reserved classes, reserved for standardisation.
- */
-enum ofp_oxm_class {
-    OFPXMC_NXM_0          = 0x0000;    /* Backward compatibility with NXM */
-    OFPXMC_NXM_1          = 0x0001;    /* Backward compatibility with NXM */
-    OFPXMC_OPENFLOW_BASIC = 0x8000;    /* Basic class for OpenFlow */
-    OFPXMC_EXPERIMENTER   = 0xFFFF;    /* Experimenter class */
-};
-
-/* OXM Flow field types for OpenFlow basic class. */
-enum oxm_ofb_field_types {
-    OFPXMT_OFB_IN_PORT        = 0;  /* Switch input port. */
-    OFPXMT_OFB_IN_PHY_PORT    = 1;  /* Switch physical input port. */
-    OFPXMT_OFB_METADATA       = 2;  /* Metadata passed between tables. */
-    OFPXMT_OFB_ETH_DST        = 3;  /* Ethernet destination address. */
-    OFPXMT_OFB_ETH_SRC        = 4;  /* Ethernet source address. */
-    OFPXMT_OFB_ETH_TYPE       = 5;  /* Ethernet frame type. */
-    OFPXMT_OFB_VLAN_VID       = 6;  /* VLAN id. */
-    OFPXMT_OFB_VLAN_PCP       = 7;  /* VLAN priority. */
-    OFPXMT_OFB_IP_DSCP        = 8;  /* IP DSCP (6 bits in ToS field). */
-    OFPXMT_OFB_IP_ECN         = 9;  /* IP ECN (2 bits in ToS field). */
-    OFPXMT_OFB_IP_PROTO       = 10; /* IP protocol. */
-    OFPXMT_OFB_IPV4_SRC       = 11; /* IPv4 source address. */
-    OFPXMT_OFB_IPV4_DST       = 12; /* IPv4 destination address. */
-    OFPXMT_OFB_TCP_SRC        = 13; /* TCP source port. */
-    OFPXMT_OFB_TCP_DST        = 14; /* TCP destination port. */
-    OFPXMT_OFB_UDP_SRC        = 15; /* UDP source port. */
-    OFPXMT_OFB_UDP_DST        = 16; /* UDP destination port. */
-    OFPXMT_OFB_SCTP_SRC       = 17; /* SCTP source port. */
-    OFPXMT_OFB_SCTP_DST       = 18; /* SCTP destination port. */
-    OFPXMT_OFB_ICMPV4_TYPE    = 19; /* ICMP type. */
-    OFPXMT_OFB_ICMPV4_CODE    = 20; /* ICMP code. */
-    OFPXMT_OFB_ARP_OP         = 21; /* ARP opcode. */
-    OFPXMT_OFB_ARP_SPA        = 22; /* ARP source IPv4 address. */
-    OFPXMT_OFB_ARP_TPA        = 23; /* ARP target IPv4 address. */
-    OFPXMT_OFB_ARP_SHA        = 24; /* ARP source hardware address. */
-    OFPXMT_OFB_ARP_THA        = 25; /* ARP target hardware address. */
-    OFPXMT_OFB_IPV6_SRC       = 26; /* IPv6 source address. */
-    OFPXMT_OFB_IPV6_DST       = 27; /* IPv6 destination address. */
-    OFPXMT_OFB_IPV6_FLABEL    = 28; /* IPv6 Flow Label */
-    OFPXMT_OFB_ICMPV6_TYPE    = 29; /* ICMPv6 type. */
-    OFPXMT_OFB_ICMPV6_CODE    = 30; /* ICMPv6 code. */
-    OFPXMT_OFB_IPV6_ND_TARGET = 31; /* Target address for ND. */
-    OFPXMT_OFB_IPV6_ND_SLL    = 32; /* Source link-layer for ND. */
-    OFPXMT_OFB_IPV6_ND_TLL    = 33; /* Target link-layer for ND. */
-    OFPXMT_OFB_MPLS_LABEL     = 34; /* MPLS label. */
-    OFPXMT_OFB_MPLS_TC        = 35; /* MPLS TC. */
-    OFPXMT_OFB_MPLS_BOS       = 36; /* MPLS BoS bit. */
-    OFPXMT_OFB_PBB_ISID       = 37; /* PBB I-SID. */
-    OFPXMT_OFB_TUNNEL_ID      = 38; /* Logical Port Metadata. */
-    OFPXMT_OFB_IPV6_EXTHDR    = 39; /* IPv6 Extension Header pseudo-field */
-};
-
-/* OXM Flow match fields */
-message ofp_oxm_field {
-    ofp_oxm_class oxm_class = 1;
-    oneof field {
-        /* 2 and 3 reserved for NXM_0 and NXM-1 OXM classes */
-        ofp_oxm_ofb_field ofb_field = 4;
-        ofp_oxm_experimenter_field experimenter_field = 5;
-    }
-}
-
-/* OXM OpenFlow Basic Match Field */
-message ofp_oxm_ofb_field {
-    oxm_ofb_field_types type = 1;
-    bool has_mask = 2;
-    oneof value {
-
-        /* OpenFlow port on which the packet was received.
-         * May be a physical port, a logical port, or the reserved port OFPP_LOCAL
-         *
-         * Prereqs: None.
-         *
-         * Format: 32-bit integer in network byte order.
-         *
-         * Masking: Not maskable. */
-        //#define OXM_OF_IN_PORT    OXM_HEADER  (0x8000, OFPXMT_OFB_IN_PORT, 4)
-        uint32 port = 3; /* Used for OFPXMT_OFB_IN_PORT */
-
-        /* Physical port on which the packet was received.
-         *
-         * Consider a packet received on a tunnel interface defined over a link
-         * aggregation group (LAG) with two physical port members.  If the tunnel
-         * interface is the logical port bound to OpenFlow.  In this case,
-         * OFPXMT_OF_IN_PORT is the tunnel's port number and OFPXMT_OF_IN_PHY_PORT is
-         * the physical port number of the LAG on which the tunnel is configured.
-         *
-         * When a packet is received directly on a physical port and not processed by a
-         * logical port, OFPXMT_OF_IN_PORT and OFPXMT_OF_IN_PHY_PORT have the same
-         * value.
-         *
-         * This field is usually not available in a regular match and only available
-         * in ofp_packet_in messages when it's different from OXM_OF_IN_PORT.
-         *
-         * Prereqs: OXM_OF_IN_PORT must be present.
-         *
-         * Format: 32-bit integer in network byte order.
-         *
-         * Masking: Not maskable. */
-        //#define OXM_OF_IN_PHY_PORT OXM_HEADER  (0x8000, OFPXMT_OFB_IN_PHY_PORT, 4)
-        uint32 physical_port = 4; /* Used for OFPXMT_OF_IN_PHY_PORT */
-
-        /* Table metadata.
-         *
-         * Prereqs: None.
-         *
-         * Format: 64-bit integer in network byte order.
-         *
-         * Masking: Arbitrary masks.
-         */
-        //#define OXM_OF_METADATA   OXM_HEADER  (0x8000, OFPXMT_OFB_METADATA, 8)
-        //#define OXM_OF_METADATA_W OXM_HEADER_W(0x8000, OFPXMT_OFB_METADATA, 8)
-        uint64 table_metadata = 5; /* Used for OFPXMT_OFB_METADATA */
-
-        /* Source or destination address in Ethernet header.
-         *
-         * Prereqs: None.
-         *
-         * Format: 48-bit Ethernet MAC address.
-         *
-         * Masking: Arbitrary masks. */
-        //#define OXM_OF_ETH_DST    OXM_HEADER  (0x8000, OFPXMT_OFB_ETH_DST, 6)
-        //#define OXM_OF_ETH_DST_W  OXM_HEADER_W(0x8000, OFPXMT_OFB_ETH_DST, 6)
-        //#define OXM_OF_ETH_SRC    OXM_HEADER  (0x8000, OFPXMT_OFB_ETH_SRC, 6)
-        //#define OXM_OF_ETH_SRC_W  OXM_HEADER_W(0x8000, OFPXMT_OFB_ETH_SRC, 6)
-        bytes eth_dst = 6; /* Used for OFPXMT_OFB_ETH_DST (exactly 6 bytes) */
-        bytes eth_src = 7; /* Used for OFPXMT_OFB_ETH_SRC (exactly 6 bytes) */
-
-        /* Packet's Ethernet type.
-         *
-         * Prereqs: None.
-         *
-         * Format: 16-bit integer in network byte order.
-         *
-         * Masking: Not maskable. */
-        //#define OXM_OF_ETH_TYPE   OXM_HEADER  (0x8000, OFPXMT_OFB_ETH_TYPE,2)
-        uint32 eth_type = 8; /* Used for OFPXMT_OFB_ETH_TYPE */
-
-        /* 802.1Q VID.
-         *
-         * For a packet with an 802.1Q header, this is the VLAN-ID (VID) from the
-         * outermost tag, with the CFI bit forced to 1. For a packet with no 802.1Q
-         * header, this has value OFPVID_NONE.
-         *
-         * Prereqs: None.
-         *
-         * Format: 16-bit integer in network byte order with bit 13 indicating
-         * presence of VLAN header and 3 most-significant bits forced to 0.
-         * Only the lower 13 bits have meaning.
-         *
-         * Masking: Arbitrary masks.
-         *
-         * This field can be used in various ways:
-         *
-         *   - If it is not constrained at all, the nx_match matches packets without
-         *     an 802.1Q header or with an 802.1Q header that has any VID value.
-         *
-         *   - Testing for an exact match with 0x0 matches only packets without
-         *     an 802.1Q header.
-         *
-         *   - Testing for an exact match with a VID value with CFI=1 matches packets
-         *     that have an 802.1Q header with a specified VID.
-         *
-         *   - Testing for an exact match with a nonzero VID value with CFI=0 does
-         *     not make sense.  The switch may reject this combination.
-         *
-         *   - Testing with nxm_value=0, nxm_mask=0x0fff matches packets with no 802.1Q
-         *     header or with an 802.1Q header with a VID of 0.
-         *
-         *   - Testing with nxm_value=0x1000, nxm_mask=0x1000 matches packets with
-         *     an 802.1Q header that has any VID value.
-         */
-        //#define OXM_OF_VLAN_VID   OXM_HEADER  (0x8000, OFPXMT_OFB_VLAN_VID, 2)
-        //#define OXM_OF_VLAN_VID_W OXM_HEADER_W(0x8000, OFPXMT_OFB_VLAN_VID, 2)
-        uint32 vlan_vid = 9; /* Used for OFPXMT_OFB_VLAN_VID */
-
-        /* 802.1Q PCP.
-         *
-         * For a packet with an 802.1Q header, this is the VLAN-PCP from the
-         * outermost tag.  For a packet with no 802.1Q header, this has value
-         * 0.
-         *
-         * Prereqs: OXM_OF_VLAN_VID must be different from OFPVID_NONE.
-         *
-         * Format: 8-bit integer with 5 most-significant bits forced to 0.
-         * Only the lower 3 bits have meaning.
-         *
-         * Masking: Not maskable.
-         */
-        //#define OXM_OF_VLAN_PCP   OXM_HEADER  (0x8000, OFPXMT_OFB_VLAN_PCP, 1)
-        uint32 vlan_pcp = 10; /* Used for OFPXMT_OFB_VLAN_PCP */
-
-        /* The Diff Serv Code Point (DSCP) bits of the IP header.
-         * Part of the IPv4 ToS field or the IPv6 Traffic Class field.
-         *
-         * Prereqs: OXM_OF_ETH_TYPE must be either 0x0800 or 0x86dd.
-         *
-         * Format: 8-bit integer with 2 most-significant bits forced to 0.
-         * Only the lower 6 bits have meaning.
-         *
-         * Masking: Not maskable. */
-        //#define OXM_OF_IP_DSCP     OXM_HEADER  (0x8000, OFPXMT_OFB_IP_DSCP, 1)
-        uint32 ip_dscp = 11; /* Used for OFPXMT_OFB_IP_DSCP */
-
-        /* The ECN bits of the IP header.
-         * Part of the IPv4 ToS field or the IPv6 Traffic Class field.
-         *
-         * Prereqs: OXM_OF_ETH_TYPE must be either 0x0800 or 0x86dd.
-         *
-         * Format: 8-bit integer with 6 most-significant bits forced to 0.
-         * Only the lower 2 bits have meaning.
-         *
-         * Masking: Not maskable. */
-        //#define OXM_OF_IP_ECN     OXM_HEADER  (0x8000, OFPXMT_OFB_IP_ECN, 1)
-        uint32 ip_ecn = 12; /* Used for OFPXMT_OFB_IP_ECN */
-
-        /* The "protocol" byte in the IP header.
-         *
-         * Prereqs: OXM_OF_ETH_TYPE must be either 0x0800 or 0x86dd.
-         *
-         * Format: 8-bit integer.
-         *
-         * Masking: Not maskable. */
-        //#define OXM_OF_IP_PROTO   OXM_HEADER  (0x8000, OFPXMT_OFB_IP_PROTO, 1)
-        uint32 ip_proto = 13; /* Used for OFPXMT_OFB_IP_PROTO */
-
-        /* The source or destination address in the IP header.
-         *
-         * Prereqs: OXM_OF_ETH_TYPE must match 0x0800 exactly.
-         *
-         * Format: 32-bit integer in network byte order.
-         *
-         * Masking: Arbitrary masks.
-         */
-        //#define OXM_OF_IPV4_SRC     OXM_HEADER  (0x8000, OFPXMT_OFB_IPV4_SRC, 4)
-        //#define OXM_OF_IPV4_SRC_W   OXM_HEADER_W(0x8000, OFPXMT_OFB_IPV4_SRC, 4)
-        //#define OXM_OF_IPV4_DST     OXM_HEADER  (0x8000, OFPXMT_OFB_IPV4_DST, 4)
-        //#define OXM_OF_IPV4_DST_W   OXM_HEADER_W(0x8000, OFPXMT_OFB_IPV4_DST, 4)
-        uint32 ipv4_src = 14; /* Used for OFPXMT_OFB_IPV4_SRC */
-        uint32 ipv4_dst = 15; /* Used for OFPXMT_OFB_IPV4_DST */
-
-        /* The source or destination port in the TCP header.
-         *
-         * Prereqs:
-         *   OXM_OF_ETH_TYPE must be either 0x0800 or 0x86dd.
-         *   OXM_OF_IP_PROTO must match 6 exactly.
-         *
-         * Format: 16-bit integer in network byte order.
-         *
-         * Masking: Not maskable. */
-        //#define OXM_OF_TCP_SRC    OXM_HEADER  (0x8000, OFPXMT_OFB_TCP_SRC, 2)
-        //#define OXM_OF_TCP_DST    OXM_HEADER  (0x8000, OFPXMT_OFB_TCP_DST, 2)
-        uint32 tcp_src = 16; /* Used for OFPXMT_OFB_TCP_SRC */
-        uint32 tcp_dst = 17; /* Used for OFPXMT_OFB_TCP_DST */
-
-        /* The source or destination port in the UDP header.
-         *
-         * Prereqs:
-         *   OXM_OF_ETH_TYPE must match either 0x0800 or 0x86dd.
-         *   OXM_OF_IP_PROTO must match 17 exactly.
-         *
-         * Format: 16-bit integer in network byte order.
-         *
-         * Masking: Not maskable. */
-        //#define OXM_OF_UDP_SRC    OXM_HEADER  (0x8000, OFPXMT_OFB_UDP_SRC, 2)
-        //#define OXM_OF_UDP_DST    OXM_HEADER  (0x8000, OFPXMT_OFB_UDP_DST, 2)
-        uint32 udp_src = 18; /* Used for OFPXMT_OFB_UDP_SRC */
-        uint32 udp_dst = 19; /* Used for OFPXMT_OFB_UDP_DST */
-
-        /* The source or destination port in the SCTP header.
-         *
-         * Prereqs:
-         *   OXM_OF_ETH_TYPE must match either 0x0800 or 0x86dd.
-         *   OXM_OF_IP_PROTO must match 132 exactly.
-         *
-         * Format: 16-bit integer in network byte order.
-         *
-         * Masking: Not maskable. */
-        //#define OXM_OF_SCTP_SRC   OXM_HEADER  (0x8000, OFPXMT_OFB_SCTP_SRC, 2)
-        //#define OXM_OF_SCTP_DST   OXM_HEADER  (0x8000, OFPXMT_OFB_SCTP_DST, 2)
-        uint32 sctp_src = 20; /* Used for OFPXMT_OFB_SCTP_SRC */
-        uint32 sctp_dst = 21; /* Used for OFPXMT_OFB_SCTP_DST */
-
-        /* The type or code in the ICMP header.
-         *
-         * Prereqs:
-         *   OXM_OF_ETH_TYPE must match 0x0800 exactly.
-         *   OXM_OF_IP_PROTO must match 1 exactly.
-         *
-         * Format: 8-bit integer.
-         *
-         * Masking: Not maskable. */
-        //#define OXM_OF_ICMPV4_TYPE  OXM_HEADER  (0x8000, OFPXMT_OFB_ICMPV4_TYPE, 1)
-        //#define OXM_OF_ICMPV4_CODE  OXM_HEADER  (0x8000, OFPXMT_OFB_ICMPV4_CODE, 1)
-        uint32 icmpv4_type = 22; /* Used for OFPXMT_OFB_ICMPV4_TYPE */
-        uint32 icmpv4_code = 23; /* Used for OFPXMT_OFB_ICMPV4_CODE */
-
-        /* ARP opcode.
-         *
-         * For an Ethernet+IP ARP packet, the opcode in the ARP header.  Always 0
-         * otherwise.
-         *
-         * Prereqs: OXM_OF_ETH_TYPE must match 0x0806 exactly.
-         *
-         * Format: 16-bit integer in network byte order.
-         *
-         * Masking: Not maskable. */
-        //#define OXM_OF_ARP_OP     OXM_HEADER  (0x8000, OFPXMT_OFB_ARP_OP, 2)
-        uint32 arp_op = 24; /* Used for OFPXMT_OFB_ARP_OP */
-
-        /* For an Ethernet+IP ARP packet, the source or target protocol address
-         * in the ARP header.  Always 0 otherwise.
-         *
-         * Prereqs: OXM_OF_ETH_TYPE must match 0x0806 exactly.
-         *
-         * Format: 32-bit integer in network byte order.
-         *
-         * Masking: Arbitrary masks.
-         */
-        //#define OXM_OF_ARP_SPA    OXM_HEADER  (0x8000, OFPXMT_OFB_ARP_SPA, 4)
-        //#define OXM_OF_ARP_SPA_W  OXM_HEADER_W(0x8000, OFPXMT_OFB_ARP_SPA, 4)
-        //#define OXM_OF_ARP_TPA    OXM_HEADER  (0x8000, OFPXMT_OFB_ARP_TPA, 4)
-        //#define OXM_OF_ARP_TPA_W  OXM_HEADER_W(0x8000, OFPXMT_OFB_ARP_TPA, 4)
-        uint32 arp_spa = 25; /* For OFPXMT_OFB_ARP_SPA */
-        uint32 arp_tpa = 26; /* For OFPXMT_OFB_ARP_TPA */
-
-        /* For an Ethernet+IP ARP packet, the source or target hardware address
-         * in the ARP header.  Always 0 otherwise.
-         *
-         * Prereqs: OXM_OF_ETH_TYPE must match 0x0806 exactly.
-         *
-         * Format: 48-bit Ethernet MAC address.
-         *
-         * Masking: Not maskable. */
-        //#define OXM_OF_ARP_SHA    OXM_HEADER   (0x8000, OFPXMT_OFB_ARP_SHA, 6)
-        //#define OXM_OF_ARP_SHA_W  OXM_HEADER_W (0x8000, OFPXMT_OFB_ARP_SHA, 6)
-        //#define OXM_OF_ARP_THA    OXM_HEADER   (0x8000, OFPXMT_OFB_ARP_THA, 6)
-        //#define OXM_OF_ARP_THA_W  OXM_HEADER_W (0x8000, OFPXMT_OFB_ARP_THA, 6)
-        bytes arp_sha = 27; /* For OFPXMT_OFB_ARP_SHA (6 bytes) */
-        bytes arp_tha = 28; /* For OFPXMT_OFB_ARP_THA (6 bytes) */
-
-        /* The source or destination address in the IPv6 header.
-         *
-         * Prereqs: OXM_OF_ETH_TYPE must match 0x86dd exactly.
-         *
-         * Format: 128-bit IPv6 address.
-         *
-         * Masking: Arbitrary masks.
-         */
-        //#define OXM_OF_IPV6_SRC    OXM_HEADER  (0x8000, OFPXMT_OFB_IPV6_SRC, 16)
-        //#define OXM_OF_IPV6_SRC_W  OXM_HEADER_W(0x8000, OFPXMT_OFB_IPV6_SRC, 16)
-        //#define OXM_OF_IPV6_DST    OXM_HEADER  (0x8000, OFPXMT_OFB_IPV6_DST, 16)
-        //#define OXM_OF_IPV6_DST_W  OXM_HEADER_W(0x8000, OFPXMT_OFB_IPV6_DST, 16)
-        bytes ipv6_src = 29; /* For OFPXMT_OFB_IPV6_SRC */
-        bytes ipv6_dst = 30; /* For OFPXMT_OFB_IPV6_DST */
-
-        /* The IPv6 Flow Label
-         *
-         * Prereqs:
-         *   OXM_OF_ETH_TYPE must match 0x86dd exactly
-         *
-         * Format: 32-bit integer with 12 most-significant bits forced to 0.
-         * Only the lower 20 bits have meaning.
-         *
-         * Masking: Arbitrary masks.
-         */
-        //#define OXM_OF_IPV6_FLABEL   OXM_HEADER  (0x8000, OFPXMT_OFB_IPV6_FLABEL, 4)
-        //#define OXM_OF_IPV6_FLABEL_W OXM_HEADER_W(0x8000, OFPXMT_OFB_IPV6_FLABEL, 4)
-        uint32 ipv6_flabel = 31; /* For OFPXMT_OFB_IPV6_FLABEL */
-
-        /* The type or code in the ICMPv6 header.
-         *
-         * Prereqs:
-         *   OXM_OF_ETH_TYPE must match 0x86dd exactly.
-         *   OXM_OF_IP_PROTO must match 58 exactly.
-         *
-         * Format: 8-bit integer.
-         *
-         * Masking: Not maskable. */
-        //#define OXM_OF_ICMPV6_TYPE OXM_HEADER  (0x8000, OFPXMT_OFB_ICMPV6_TYPE, 1)
-        //#define OXM_OF_ICMPV6_CODE OXM_HEADER  (0x8000, OFPXMT_OFB_ICMPV6_CODE, 1)
-        uint32 icmpv6_type = 32; /* For OFPXMT_OFB_ICMPV6_TYPE */
-        uint32 icmpv6_code = 33; /* For OFPXMT_OFB_ICMPV6_CODE */
-
-        /* The target address in an IPv6 Neighbor Discovery message.
-         *
-         * Prereqs:
-         *   OXM_OF_ETH_TYPE must match 0x86dd exactly.
-         *   OXM_OF_IP_PROTO must match 58 exactly.
-         *   OXM_OF_ICMPV6_TYPE must be either 135 or 136.
-         *
-         * Format: 128-bit IPv6 address.
-         *
-         * Masking: Not maskable. */
-        //#define OXM_OF_IPV6_ND_TARGET OXM_HEADER \
-        //    (0x8000, OFPXMT_OFB_IPV6_ND_TARGET, 16)
-        bytes ipv6_nd_target = 34; /* For OFPXMT_OFB_IPV6_ND_TARGET */
-
-        /* The source link-layer address option in an IPv6 Neighbor Discovery
-         * message.
-         *
-         * Prereqs:
-         *   OXM_OF_ETH_TYPE must match 0x86dd exactly.
-         *   OXM_OF_IP_PROTO must match 58 exactly.
-         *   OXM_OF_ICMPV6_TYPE must be exactly 135.
-         *
-         * Format: 48-bit Ethernet MAC address.
-         *
-         * Masking: Not maskable. */
-        //#define OXM_OF_IPV6_ND_SLL  OXM_HEADER  (0x8000, OFPXMT_OFB_IPV6_ND_SLL, 6)
-        bytes ipv6_nd_ssl = 35; /* For OFPXMT_OFB_IPV6_ND_SLL */
-
-        /* The target link-layer address option in an IPv6 Neighbor Discovery
-         * message.
-         *
-         * Prereqs:
-         *   OXM_OF_ETH_TYPE must match 0x86dd exactly.
-         *   OXM_OF_IP_PROTO must match 58 exactly.
-         *   OXM_OF_ICMPV6_TYPE must be exactly 136.
-         *
-         * Format: 48-bit Ethernet MAC address.
-         *
-         * Masking: Not maskable. */
-        //#define OXM_OF_IPV6_ND_TLL  OXM_HEADER  (0x8000, OFPXMT_OFB_IPV6_ND_TLL, 6)
-        bytes ipv6_nd_tll = 36; /* For OFPXMT_OFB_IPV6_ND_TLL */
-
-        /* The LABEL in the first MPLS shim header.
-         *
-         * Prereqs:
-         *   OXM_OF_ETH_TYPE must match 0x8847 or 0x8848 exactly.
-         *
-         * Format: 32-bit integer in network byte order with 12 most-significant
-         * bits forced to 0. Only the lower 20 bits have meaning.
-         *
-         * Masking: Not maskable. */
-        //#define OXM_OF_MPLS_LABEL  OXM_HEADER  (0x8000, OFPXMT_OFB_MPLS_LABEL, 4)
-        uint32 mpls_label = 37; /* For OFPXMT_OFB_MPLS_LABEL */
-
-        /* The TC in the first MPLS shim header.
-         *
-         * Prereqs:
-         *   OXM_OF_ETH_TYPE must match 0x8847 or 0x8848 exactly.
-         *
-         * Format: 8-bit integer with 5 most-significant bits forced to 0.
-         * Only the lower 3 bits have meaning.
-         *
-         * Masking: Not maskable. */
-        //#define OXM_OF_MPLS_TC     OXM_HEADER  (0x8000, OFPXMT_OFB_MPLS_TC, 1)
-        uint32 mpls_tc = 38; /* For OFPXMT_OFB_MPLS_TC */
-
-        /* The BoS bit in the first MPLS shim header.
-         *
-         * Prereqs:
-         *   OXM_OF_ETH_TYPE must match 0x8847 or 0x8848 exactly.
-         *
-         * Format: 8-bit integer with 7 most-significant bits forced to 0.
-         * Only the lowest bit have a meaning.
-         *
-         * Masking: Not maskable. */
-        //#define OXM_OF_MPLS_BOS     OXM_HEADER  (0x8000, OFPXMT_OFB_MPLS_BOS, 1)
-        uint32 mpls_bos = 39; /* For OFPXMT_OFB_MPLS_BOS */
-
-        /* IEEE 802.1ah I-SID.
-         *
-         * For a packet with a PBB header, this is the I-SID from the
-         * outermost service tag.
-         *
-         * Prereqs:
-         *   OXM_OF_ETH_TYPE must match 0x88E7 exactly.
-         *
-         * Format: 24-bit integer in network byte order.
-         *
-         * Masking: Arbitrary masks. */
-        //#define OXM_OF_PBB_ISID   OXM_HEADER  (0x8000, OFPXMT_OFB_PBB_ISID, 3)
-        //#define OXM_OF_PBB_ISID_W OXM_HEADER_W(0x8000, OFPXMT_OFB_PBB_ISID, 3)
-        uint32 pbb_isid = 40; /* For OFPXMT_OFB_PBB_ISID */
-
-        /* Logical Port Metadata.
-         *
-         * Metadata associated with a logical port.
-         * If the logical port performs encapsulation and decapsulation, this
-         * is the demultiplexing field from the encapsulation header.
-         * For example, for a packet received via GRE tunnel including a (32-bit) key,
-         * the key is stored in the low 32-bits and the high bits are zeroed.
-         * For a MPLS logical port, the low 20 bits represent the MPLS Label.
-         * For a VxLAN logical port, the low 24 bits represent the VNI.
-         * If the packet is not received through a logical port, the value is 0.
-         *
-         * Prereqs: None.
-         *
-         * Format: 64-bit integer in network byte order.
-         *
-         * Masking: Arbitrary masks. */
-        //#define OXM_OF_TUNNEL_ID    OXM_HEADER  (0x8000, OFPXMT_OFB_TUNNEL_ID, 8)
-        //#define OXM_OF_TUNNEL_ID_W  OXM_HEADER_W(0x8000, OFPXMT_OFB_TUNNEL_ID, 8)
-        uint64 tunnel_id = 41; /* For OFPXMT_OFB_TUNNEL_ID */
-
-        /* The IPv6 Extension Header pseudo-field.
-         *
-         * Prereqs:
-         *   OXM_OF_ETH_TYPE must match 0x86dd exactly
-         *
-         * Format: 16-bit integer with 7 most-significant bits forced to 0.
-         * Only the lower 9 bits have meaning.
-         *
-         * Masking: Maskable. */
-        //#define OXM_OF_IPV6_EXTHDR   OXM_HEADER  (0x8000, OFPXMT_OFB_IPV6_EXTHDR, 2)
-        //#define OXM_OF_IPV6_EXTHDR_W OXM_HEADER_W(0x8000, OFPXMT_OFB_IPV6_EXTHDR, 2)
-        uint32 ipv6_exthdr = 42; /* For OFPXMT_OFB_IPV6_EXTHDR */
-
-    }
-
-    /* Optional mask values (must be present when has_mask is true */
-    oneof mask {
-        uint64 table_metadata_mask = 105; /* For OFPXMT_OFB_METADATA */
-
-        bytes eth_dst_mask = 106; /* For OFPXMT_OFB_ETH_DST (exactly 6 bytes)*/
-        bytes eth_src_mask = 107; /* For OFPXMT_OFB_ETH_SRC (exactly 6 bytes)*/
-
-        uint32 vlan_vid_mask = 109; /* For OFPXMT_OFB_VLAN_VID */
-
-        uint32 ipv4_src_mask = 114; /* For OFPXMT_OFB_IPV4_SRC */
-        uint32 ipv4_dst_mask = 115; /* For OFPXMT_OFB_IPV4_DST */
-
-        uint32 arp_spa_mask = 125; /* For OFPXMT_OFB_ARP_SPA */
-        uint32 arp_tpa_mask = 126; /* For OFPXMT_OFB_ARP_TPA */
-
-        bytes ipv6_src_mask = 129; /* For OFPXMT_OFB_IPV6_SRC */
-        bytes ipv6_dst_mask = 130; /* For OFPXMT_OFB_IPV6_DST */
-
-        uint32 ipv6_flabel_mask = 131; /* For OFPXMT_OFB_IPV6_FLABEL */
-
-        uint32 pbb_isid_mask = 140; /* For OFPXMT_OFB_PBB_ISID */
-
-        uint64 tunnel_id_mask = 141; /* For OFPXMT_OFB_TUNNEL_ID */
-
-        uint32 ipv6_exthdr_mask = 142; /* For OFPXMT_OFB_IPV6_EXTHDR */
-    }
-
-}
-//#define OFPXMT_OFB_ALL    ((UINT64_C(1) << 40) - 1)
-
-
-/* The VLAN id is 12-bits, so we can use the entire 16 bits to indicate
- * special conditions.
- */
-enum ofp_vlan_id {
-    OFPVID_NONE    = 0x0000; /* No VLAN id was set. */
-    OFPVID_PRESENT = 0x1000; /* Bit that indicate that a VLAN id is set */
-};
-/* Define for compatibility */
-//#define OFP_VLAN_NONE      OFPVID_NONE
-
-/* Bit definitions for IPv6 Extension Header pseudo-field. */
-enum ofp_ipv6exthdr_flags {
-    OFPIEH_INVALID = 0;
-    OFPIEH_NONEXT  = 1;     /* "No next header" encountered. */
-    OFPIEH_ESP     = 2;     /* Encrypted Sec Payload header present. */
-    OFPIEH_AUTH    = 4;     /* Authentication header present. */
-    OFPIEH_DEST    = 8;     /* 1 or 2 dest headers present. */
-    OFPIEH_FRAG    = 16;    /* Fragment header present. */
-    OFPIEH_ROUTER  = 32;    /* Router header present. */
-    OFPIEH_HOP     = 64;    /* Hop-by-hop header present. */
-    OFPIEH_UNREP   = 128;   /* Unexpected repeats encountered. */
-    OFPIEH_UNSEQ   = 256;   /* Unexpected sequencing encountered. */
-};
-
-/* Header for OXM experimenter match fields.
- * The experimenter class should not use OXM_HEADER() macros for defining
- * fields due to this extra header. */
-message ofp_oxm_experimenter_field {
-    uint32 oxm_header = 1;    /* oxm_class = OFPXMC_EXPERIMENTER */
-    uint32 experimenter = 2;  /* Experimenter ID which takes the same
-                                 form as in struct ofp_experimenter_header. */
-};
-
-/* ## ----------------- ## */
-/* ## OpenFlow Actions. ## */
-/* ## ----------------- ## */
-
-enum ofp_action_type {
-    OFPAT_OUTPUT       = 0;  /* Output to switch port. */
-    OFPAT_COPY_TTL_OUT = 11; /* Copy TTL "outwards" -- from next-to-outermost
-                                to outermost */
-    OFPAT_COPY_TTL_IN  = 12; /* Copy TTL "inwards" -- from outermost to
-                               next-to-outermost */
-    OFPAT_SET_MPLS_TTL = 15; /* MPLS TTL */
-    OFPAT_DEC_MPLS_TTL = 16; /* Decrement MPLS TTL */
-
-    OFPAT_PUSH_VLAN    = 17; /* Push a new VLAN tag */
-    OFPAT_POP_VLAN     = 18; /* Pop the outer VLAN tag */
-    OFPAT_PUSH_MPLS    = 19; /* Push a new MPLS tag */
-    OFPAT_POP_MPLS     = 20; /* Pop the outer MPLS tag */
-    OFPAT_SET_QUEUE    = 21; /* Set queue id when outputting to a port */
-    OFPAT_GROUP        = 22; /* Apply group. */
-    OFPAT_SET_NW_TTL   = 23; /* IP TTL. */
-    OFPAT_DEC_NW_TTL   = 24; /* Decrement IP TTL. */
-    OFPAT_SET_FIELD    = 25; /* Set a header field using OXM TLV format. */
-    OFPAT_PUSH_PBB     = 26; /* Push a new PBB service tag (I-TAG) */
-    OFPAT_POP_PBB      = 27; /* Pop the outer PBB service tag (I-TAG) */
-    OFPAT_EXPERIMENTER = 0xffff;
-};
-
-/* Action header that is common to all actions.  The length includes the
- * header and any padding used to make the action 64-bit aligned.
- * NB: The length of an action *must* always be a multiple of eight. */
-message ofp_action {
-    ofp_action_type type = 1;       /* One of OFPAT_*. */
-    oneof action {
-        ofp_action_output output = 2;
-        ofp_action_mpls_ttl mpls_ttl = 3;
-        ofp_action_push push = 4;
-        ofp_action_pop_mpls pop_mpls = 5;
-        ofp_action_group group = 6;
-        ofp_action_nw_ttl nw_ttl = 7;
-        ofp_action_set_field set_field = 8;
-        ofp_action_experimenter experimenter = 9;
-    }
-};
-
-enum ofp_controller_max_len {
-    OFPCML_INVALID   = 0;
-    OFPCML_MAX       = 0xffe5; /* maximum max_len value which can be used
-                                  to request a specific byte length. */
-    OFPCML_NO_BUFFER = 0xffff; /* indicates that no buffering should be
-                                  applied and the whole packet is to be
-                                  sent to the controller. */
-};
-
-/* Action structure for OFPAT_OUTPUT, which sends packets out 'port'.
- * When the 'port' is the OFPP_CONTROLLER, 'max_len' indicates the max
- * number of bytes to send.  A 'max_len' of zero means no bytes of the
- * packet should be sent. A 'max_len' of OFPCML_NO_BUFFER means that
- * the packet is not buffered and the complete packet is to be sent to
- * the controller. */
-message ofp_action_output {
-    uint32 port = 1;                 /* Output port. */
-    uint32 max_len = 2;              /* Max length to send to controller. */
-};
-
-/* Action structure for OFPAT_SET_MPLS_TTL. */
-message ofp_action_mpls_ttl {
-    uint32 mpls_ttl = 1;             /* MPLS TTL */
-};
-
-/* Action structure for OFPAT_PUSH_VLAN/MPLS/PBB. */
-message ofp_action_push {
-    uint32 ethertype = 1;            /* Ethertype */
-};
-
-/* Action structure for OFPAT_POP_MPLS. */
-message ofp_action_pop_mpls {
-    uint32 ethertype = 1;            /* Ethertype */
-};
-
-/* Action structure for OFPAT_GROUP. */
-message ofp_action_group {
-    uint32 group_id = 1;             /* Group identifier. */
-};
-
-/* Action structure for OFPAT_SET_NW_TTL. */
-message ofp_action_nw_ttl {
-    uint32 nw_ttl = 1;               /* IP TTL */
-};
-
-/* Action structure for OFPAT_SET_FIELD. */
-message ofp_action_set_field {
-    ofp_oxm_field field = 1;
-};
-
-/* Action header for OFPAT_EXPERIMENTER.
- * The rest of the body is experimenter-defined. */
-message ofp_action_experimenter {
-    uint32 experimenter = 1;         /* Experimenter ID which takes the same
-                                        form as in struct
-                                        ofp_experimenter_header. */
-    bytes data = 2;
-};
-
-/* ## ---------------------- ## */
-/* ## OpenFlow Instructions. ## */
-/* ## ---------------------- ## */
-
-enum ofp_instruction_type {
-    OFPIT_INVALID    = 0;
-    OFPIT_GOTO_TABLE = 1;       /* Setup the next table in the lookup
-                                   pipeline */
-    OFPIT_WRITE_METADATA = 2;   /* Setup the metadata field for use later in
-                                   pipeline */
-    OFPIT_WRITE_ACTIONS = 3;    /* Write the action(s) onto the datapath action
-                                   set */
-    OFPIT_APPLY_ACTIONS = 4;    /* Applies the action(s) immediately */
-    OFPIT_CLEAR_ACTIONS = 5;    /* Clears all actions from the datapath
-                                   action set */
-    OFPIT_METER = 6;            /* Apply meter (rate limiter) */
-
-    OFPIT_EXPERIMENTER = 0xFFFF; /* Experimenter instruction */
-};
-
-/* Instruction header that is common to all instructions.  The length includes
- * the header and any padding used to make the instruction 64-bit aligned.
- * NB: The length of an instruction *must* always be a multiple of eight. */
-message ofp_instruction {
-    uint32 type = 1;               /* Instruction type */
-    oneof data {
-        ofp_instruction_goto_table goto_table = 2;
-        ofp_instruction_write_metadata write_metadata = 3;
-        ofp_instruction_actions actions = 4;
-        ofp_instruction_meter meter = 5;
-        ofp_instruction_experimenter experimenter = 6;
-    }
-};
-
-/* Instruction structure for OFPIT_GOTO_TABLE */
-message ofp_instruction_goto_table {
-    uint32 table_id = 1;           /* Set next table in the lookup pipeline */
-};
-
-/* Instruction structure for OFPIT_WRITE_METADATA */
-message ofp_instruction_write_metadata {
-    uint64 metadata = 1;           /* Metadata value to write */
-    uint64 metadata_mask = 2;      /* Metadata write bitmask */
-};
-
-/* Instruction structure for OFPIT_WRITE/APPLY/CLEAR_ACTIONS */
-message ofp_instruction_actions {
-    repeated ofp_action actions = 1; /* 0 or more actions associated
-                                        with OFPIT_WRITE_ACTIONS and
-                                        OFPIT_APPLY_ACTIONS */
-};
-
-/* Instruction structure for OFPIT_METER */
-message ofp_instruction_meter {
-    uint32 meter_id = 1;           /* Meter instance. */
-};
-
-/* Instruction structure for experimental instructions */
-message ofp_instruction_experimenter {
-    uint32 experimenter = 1;     /* Experimenter ID which takes the same form
-                                   as in struct ofp_experimenter_header. */
-    /* Experimenter-defined arbitrary additional data. */
-    bytes data = 2;
-};
-
-/* ## --------------------------- ## */
-/* ## OpenFlow Flow Modification. ## */
-/* ## --------------------------- ## */
-
-enum ofp_flow_mod_command {
-    OFPFC_ADD           = 0; /* New flow. */
-    OFPFC_MODIFY        = 1; /* Modify all matching flows. */
-    OFPFC_MODIFY_STRICT = 2; /* Modify entry strictly matching wildcards and
-                                priority. */
-    OFPFC_DELETE        = 3; /* Delete all matching flows. */
-    OFPFC_DELETE_STRICT = 4; /* Delete entry strictly matching wildcards and
-                                priority. */
-};
-
-/* 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
-
-enum ofp_flow_mod_flags {
-    OFPFF_INVALID       = 0;
-    OFPFF_SEND_FLOW_REM = 1;  /* Send flow removed message when flow
-                               * expires or is deleted. */
-    OFPFF_CHECK_OVERLAP = 2;  /* Check for overlapping entries first. */
-    OFPFF_RESET_COUNTS  = 4;  /* Reset flow packet and byte counts. */
-    OFPFF_NO_PKT_COUNTS = 8;  /* Don't keep track of packet count. */
-    OFPFF_NO_BYT_COUNTS = 16; /* Don't keep track of byte count. */
-};
-
-/* Flow setup and teardown (controller -> datapath). */
-message ofp_flow_mod {
-    //ofp_header header;
-    uint64 cookie = 1;             /* Opaque controller-issued identifier. */
-    uint64 cookie_mask = 2;        /* Mask used to restrict the cookie bits
-                                      that must match when the command is
-                                      OFPFC_MODIFY* or OFPFC_DELETE*. A value
-                                      of 0 indicates no restriction. */
-    uint32 table_id = 3;           /* ID of the table to put the flow in.
-                                      For OFPFC_DELETE_* commands, OFPTT_ALL
-                                      can also be used to delete matching
-                                      flows from all tables. */
-    ofp_flow_mod_command command = 4; /* One of OFPFC_*. */
-    uint32 idle_timeout = 5;       /* Idle time before discarding (seconds). */
-    uint32 hard_timeout = 6;       /* Max time before discarding (seconds). */
-    uint32 priority = 7;           /* Priority level of flow entry. */
-    uint32 buffer_id = 8;          /* Buffered packet to apply to, or
-                                      OFP_NO_BUFFER.
-                                      Not meaningful for OFPFC_DELETE*. */
-    uint32 out_port = 9;          /* For OFPFC_DELETE* commands, require
-                                      matching entries to include this as an
-                                      output port.  A value of OFPP_ANY
-                                      indicates no restriction. */
-    uint32 out_group = 10;         /* For OFPFC_DELETE* commands, require
-                                      matching entries to include this as an
-                                      output group.  A value of OFPG_ANY
-                                      indicates no restriction. */
-    uint32 flags = 11;             /* Bitmap of OFPFF_* flags. */
-    ofp_match match = 12;          /* Fields to match. Variable size. */
-    repeated ofp_instruction instructions = 13; /* 0 or more. */
-};
-
-/* Group numbering. Groups can use any number up to OFPG_MAX. */
-enum ofp_group {
-
-    OFPG_INVALID = 0;
-
-    /* Last usable group number. */
-    OFPG_MAX        = 0x7fffff00;
-
-    /* Fake groups. */
-    OFPG_ALL        = 0x7ffffffc;  /* Represents all groups for group delete
-                                      commands. */
-    OFPG_ANY        = 0x7fffffff;  /* Special wildcard: no group specified. */
-};
-
-/* Group commands */
-enum ofp_group_mod_command {
-    OFPGC_ADD    = 0;       /* New group. */
-    OFPGC_MODIFY = 1;       /* Modify all matching groups. */
-    OFPGC_DELETE = 2;       /* Delete all matching groups. */
-};
-
-/* Bucket for use in groups. */
-message ofp_bucket {
-    uint32 weight = 1;              /* Relative weight of bucket.  Only
-                                       defined for select groups. */
-    uint32 watch_port = 2;          /* Port whose state affects whether this
-                                       bucket is live.  Only required for fast
-                                       failover groups. */
-    uint32 watch_group = 3;         /* Group whose state affects whether this
-                                       bucket is live.  Only required for fast
-                                       failover groups. */
-    repeated ofp_action actions = 4;
-};
-
-/* Group setup and teardown (controller -> datapath). */
-message ofp_group_mod {
-    //ofp_header header;
-    ofp_group_mod_command command = 1; /* One of OFPGC_*. */
-    ofp_group_type type = 2;           /* One of OFPGT_*. */
-    uint32 group_id = 3;               /* Group identifier. */
-    repeated ofp_bucket buckets = 4;
-};
-
-/* Group types.  Values in the range [128; 255] are reserved for experimental
- * use. */
-enum ofp_group_type {
-    OFPGT_ALL      = 0; /* All (multicast/broadcast) group.  */
-    OFPGT_SELECT   = 1; /* Select group. */
-    OFPGT_INDIRECT = 2; /* Indirect group. */
-    OFPGT_FF       = 3; /* Fast failover group. */
-};
-
-/* Special buffer-id to indicate 'no buffer' */
-//#define OFP_NO_BUFFER 0xffffffff
-
-/* Send packet (controller -> datapath). */
-message ofp_packet_out {
-    //ofp_header header;
-    uint32 buffer_id = 1;          /* ID assigned by datapath (OFP_NO_BUFFER
-                                      if none). */
-    uint32 in_port = 2;            /* Packet's input port or OFPP_CONTROLLER.*/
-    repeated ofp_action actions = 3; /* Action list - 0 or more. */
-    /* The variable size action list is optionally followed by packet data.
-     * This data is only present and meaningful if buffer_id == -1. */
-    bytes data = 4;                /* Packet data. */
-};
-
-/* Why is this packet being sent to the controller? */
-enum ofp_packet_in_reason {
-    OFPR_NO_MATCH    = 0;   /* No matching flow (table-miss flow entry). */
-    OFPR_ACTION      = 1;   /* Action explicitly output to controller. */
-    OFPR_INVALID_TTL = 2;   /* Packet has invalid TTL */
-};
-
-/* Packet received on port (datapath -> controller). */
-message ofp_packet_in {
-    //ofp_header header;
-    uint32 buffer_id = 1;     /* ID assigned by datapath. */
-    ofp_packet_in_reason reason = 2; /* Reason packet is being sent */
-    uint32 table_id = 3;      /* ID of the table that was looked up */
-    uint64 cookie = 4;        /* Cookie of the flow entry that was looked up. */
-    ofp_match match = 5;      /* Packet metadata. Variable size. */
-    bytes data = 6;           /* Ethernet frame */
-};
-
-/* Why was this flow removed? */
-enum ofp_flow_removed_reason {
-    OFPRR_IDLE_TIMEOUT = 0;     /* Flow idle time exceeded idle_timeout. */
-    OFPRR_HARD_TIMEOUT = 1;     /* Time exceeded hard_timeout. */
-    OFPRR_DELETE       = 2;     /* Evicted by a DELETE flow mod. */
-    OFPRR_GROUP_DELETE = 3;     /* Group was removed. */
-    OFPRR_METER_DELETE = 4;     /* Meter was removed */
-};
-
-/* Flow removed (datapath -> controller). */
-message ofp_flow_removed {
-    //ofp_header header;
-    uint64 cookie = 1;         /* Opaque controller-issued identifier. */
-
-    uint32 priority = 2;       /* Priority level of flow entry. */
-    ofp_flow_removed_reason reason = 3; /* One of OFPRR_*. */
-    uint32 table_id = 4;        /* ID of the table */
-
-    uint32 duration_sec = 5;   /* Time flow was alive in seconds. */
-    uint32 duration_nsec = 6;  /* Time flow was alive in nanoseconds beyond
-                                 duration_sec. */
-    uint32 idle_timeout = 7;   /* Idle timeout from original flow mod. */
-    uint32 hard_timeout = 8;   /* Hard timeout from original flow mod. */
-    uint64 packet_count = 9;
-    uint64 byte_count = 10;
-    ofp_match match = 121;  /* Description of fields. Variable size. */
-};
-
-/* Meter numbering. Flow meters can use any number up to OFPM_MAX. */
-enum ofp_meter {
-    OFPM_ZERO       = 0;
-    /* Last usable meter. */
-    OFPM_MAX        = 0x7fff0000;
-
-    /* Virtual meters. */
-    OFPM_SLOWPATH   = 0x7ffffffd;  /* Meter for slow datapath. */
-    OFPM_CONTROLLER = 0x7ffffffe;  /* Meter for controller connection. */
-    OFPM_ALL        = 0x7fffffff;  /* Represents all meters for stat requests
-                                      commands. */
-};
-
-/* Meter band types */
-enum ofp_meter_band_type {
-    OFPMBT_INVALID         = 0;
-    OFPMBT_DROP            = 1;      /* Drop packet. */
-    OFPMBT_DSCP_REMARK     = 2;      /* Remark DSCP in the IP header. */
-    OFPMBT_EXPERIMENTER    = 0xFFFF; /* Experimenter meter band. */
-};
-
-/* Common header for all meter bands */
-message ofp_meter_band_header {
-    ofp_meter_band_type type = 1;   /* One of OFPMBT_*. */
-    uint32              len = 2;    /* Length in bytes of this band. */
-    uint32              rate = 3;   /* Rate for this band. */
-    uint32              burst_size = 4;/* Size of bursts. */
-};
-
-/* OFPMBT_DROP band - drop packets */
-message ofp_meter_band_drop {
-    uint32        type = 1;   /* OFPMBT_DROP. */
-    uint32        len = 2;   /* Length in bytes of this band. */
-    uint32        rate = 3;   /* Rate for dropping packets. */
-    uint32        burst_size = 4;/* Size of bursts. */
-};
-
-/* OFPMBT_DSCP_REMARK band - Remark DSCP in the IP header */
-message ofp_meter_band_dscp_remark {
-    uint32        type = 1;       /* OFPMBT_DSCP_REMARK. */
-    uint32        len = 2;        /* Length in bytes of this band. */
-    uint32        rate = 3;       /* Rate for remarking packets. */
-    uint32        burst_size = 4; /* Size of bursts. */
-    uint32        prec_level = 5; /* Number of drop precedence level to add. */
-};
-
-/* OFPMBT_EXPERIMENTER band - Experimenter type.
- * The rest of the band is experimenter-defined. */
-message ofp_meter_band_experimenter {
-    ofp_meter_band_type type = 1;        /* One of OFPMBT_*. */
-    uint32              len = 2;         /* Length in bytes of this band. */
-    uint32              rate = 3;        /* Rate for this band. */
-    uint32              burst_size = 4;  /* Size of bursts. */
-    uint32              experimenter = 5;/* Experimenter ID which takes the
-                                            same form as in struct
-                                            ofp_experimenter_header. */
-};
-
-/* Meter commands */
-enum ofp_meter_mod_command {
-    OFPMC_ADD = 0;              /* New meter. */
-    OFPMC_MODIFY = 1;           /* Modify specified meter. */
-    OFPMC_DELETE = 2;           /* Delete specified meter. */
-};
-
-/* Meter configuration flags */
-enum ofp_meter_flags {
-    OFPMF_INVALID = 0;
-    OFPMF_KBPS    = 1;     /* Rate value in kb/s (kilo-bit per second). */
-    OFPMF_PKTPS   = 2;     /* Rate value in packet/sec. */
-    OFPMF_BURST   = 4;     /* Do burst size. */
-    OFPMF_STATS   = 8;     /* Collect statistics. */
-};
-
-/* Meter configuration. OFPT_METER_MOD. */
-message ofp_meter_mod {
-//    ofp_header   header = 1;
-    ofp_meter_mod_command command = 1;       /* One of OFPMC_*. */
-    uint32                flags = 2;         /* Bitmap of OFPMF_* flags. */
-    uint32                meter_id = 3;      /* Meter instance. */
-    repeated ofp_meter_band_header bands = 4; /* The band list length is
-                                                 inferred from the length field
-                                                 in the header. */
-};
-
-/* Values for 'type' in ofp_error_message.  These values are immutable: they
- * will not change in future versions of the protocol (although new values may
- * be added). */
-enum ofp_error_type {
-    OFPET_HELLO_FAILED         = 0;  /* Hello protocol failed. */
-    OFPET_BAD_REQUEST          = 1;  /* Request was not understood. */
-    OFPET_BAD_ACTION           = 2;  /* Error in action description. */
-    OFPET_BAD_INSTRUCTION      = 3;  /* Error in instruction list. */
-    OFPET_BAD_MATCH            = 4;  /* Error in match. */
-    OFPET_FLOW_MOD_FAILED      = 5;  /* Problem modifying flow entry. */
-    OFPET_GROUP_MOD_FAILED     = 6;  /* Problem modifying group entry. */
-    OFPET_PORT_MOD_FAILED      = 7;  /* Port mod request failed. */
-    OFPET_TABLE_MOD_FAILED     = 8;  /* Table mod request failed. */
-    OFPET_QUEUE_OP_FAILED      = 9;  /* Queue operation failed. */
-    OFPET_SWITCH_CONFIG_FAILED = 10; /* Switch config request failed. */
-    OFPET_ROLE_REQUEST_FAILED  = 11; /* Controller Role request failed. */
-    OFPET_METER_MOD_FAILED     = 12; /* Error in meter. */
-    OFPET_TABLE_FEATURES_FAILED = 13; /* Setting table features failed. */
-    OFPET_EXPERIMENTER = 0xffff;      /* Experimenter error messages. */
-};
-
-/* ofp_error_msg 'code' values for OFPET_HELLO_FAILED.  'data' contains an
- * ASCII text string that may give failure details. */
-enum ofp_hello_failed_code {
-    OFPHFC_INCOMPATIBLE = 0;    /* No compatible version. */
-    OFPHFC_EPERM        = 1;    /* Permissions error. */
-};
-
-/* ofp_error_msg 'code' values for OFPET_BAD_REQUEST.  'data' contains at least
- * the first 64 bytes of the failed request. */
-enum ofp_bad_request_code {
-    OFPBRC_BAD_VERSION      = 0;  /* ofp_header.version not supported. */
-    OFPBRC_BAD_TYPE         = 1;  /* ofp_header.type not supported. */
-    OFPBRC_BAD_MULTIPART    = 2;  /* ofp_multipart_request.type not supported.
-                                   */
-    OFPBRC_BAD_EXPERIMENTER = 3;  /* Experimenter id not supported
-                                   * (in ofp_experimenter_header or
-                                   * ofp_multipart_request or
-                                   * ofp_multipart_reply). */
-    OFPBRC_BAD_EXP_TYPE     = 4;  /* Experimenter type not supported. */
-    OFPBRC_EPERM            = 5;  /* Permissions error. */
-    OFPBRC_BAD_LEN          = 6;  /* Wrong request length for type. */
-    OFPBRC_BUFFER_EMPTY     = 7;  /* Specified buffer has already been used. */
-    OFPBRC_BUFFER_UNKNOWN   = 8;  /* Specified buffer does not exist. */
-    OFPBRC_BAD_TABLE_ID     = 9;  /* Specified table-id invalid or does not
-                                   * exist. */
-    OFPBRC_IS_SLAVE         = 10; /* Denied because controller is slave. */
-    OFPBRC_BAD_PORT         = 11; /* Invalid port. */
-    OFPBRC_BAD_PACKET       = 12; /* Invalid packet in packet-out. */
-    OFPBRC_MULTIPART_BUFFER_OVERFLOW    = 13; /* ofp_multipart_request
-                                     overflowed the assigned buffer. */
-};
-
-/* ofp_error_msg 'code' values for OFPET_BAD_ACTION.  'data' contains at least
- * the first 64 bytes of the failed request. */
-enum ofp_bad_action_code {
-    OFPBAC_BAD_TYPE           = 0;  /* Unknown or unsupported action type. */
-    OFPBAC_BAD_LEN            = 1;  /* Length problem in actions. */
-    OFPBAC_BAD_EXPERIMENTER   = 2;  /* Unknown experimenter id specified. */
-    OFPBAC_BAD_EXP_TYPE       = 3;  /* Unknown action for experimenter id. */
-    OFPBAC_BAD_OUT_PORT       = 4;  /* Problem validating output port. */
-    OFPBAC_BAD_ARGUMENT       = 5;  /* Bad action argument. */
-    OFPBAC_EPERM              = 6;  /* Permissions error. */
-    OFPBAC_TOO_MANY           = 7;  /* Can't handle this many actions. */
-    OFPBAC_BAD_QUEUE          = 8;  /* Problem validating output queue. */
-    OFPBAC_BAD_OUT_GROUP      = 9;  /* Invalid group id in forward action. */
-    OFPBAC_MATCH_INCONSISTENT = 10; /* Action can't apply for this match,
-                                       or Set-Field missing prerequisite. */
-    OFPBAC_UNSUPPORTED_ORDER  = 11; /* Action order is unsupported for the
-                                 action list in an Apply-Actions instruction */
-    OFPBAC_BAD_TAG            = 12; /* Actions uses an unsupported
-                                       tag/encap. */
-    OFPBAC_BAD_SET_TYPE       = 13; /* Unsupported type in SET_FIELD action. */
-    OFPBAC_BAD_SET_LEN        = 14; /* Length problem in SET_FIELD action. */
-    OFPBAC_BAD_SET_ARGUMENT   = 15; /* Bad argument in SET_FIELD action. */
-};
-
-/* ofp_error_msg 'code' values for OFPET_BAD_INSTRUCTION.  'data' contains at
- * least the first 64 bytes of the failed request. */
-enum ofp_bad_instruction_code {
-    OFPBIC_UNKNOWN_INST     = 0; /* Unknown instruction. */
-    OFPBIC_UNSUP_INST       = 1; /* Switch or table does not support the
-                                    instruction. */
-    OFPBIC_BAD_TABLE_ID     = 2; /* Invalid Table-ID specified. */
-    OFPBIC_UNSUP_METADATA   = 3; /* Metadata value unsupported by datapath. */
-    OFPBIC_UNSUP_METADATA_MASK = 4; /* Metadata mask value unsupported by
-                                       datapath. */
-    OFPBIC_BAD_EXPERIMENTER = 5; /* Unknown experimenter id specified. */
-    OFPBIC_BAD_EXP_TYPE     = 6; /* Unknown instruction for experimenter id. */
-    OFPBIC_BAD_LEN          = 7; /* Length problem in instructions. */
-    OFPBIC_EPERM            = 8; /* Permissions error. */
-};
-
-/* ofp_error_msg 'code' values for OFPET_BAD_MATCH.  'data' contains at least
- * the first 64 bytes of the failed request. */
-enum ofp_bad_match_code {
-    OFPBMC_BAD_TYPE         = 0;  /* Unsupported match type specified by the
-                                     match */
-    OFPBMC_BAD_LEN          = 1;  /* Length problem in match. */
-    OFPBMC_BAD_TAG          = 2;  /* Match uses an unsupported tag/encap. */
-    OFPBMC_BAD_DL_ADDR_MASK = 3;  /* Unsupported datalink addr mask - switch
-                                     does not support arbitrary datalink
-                                     address mask. */
-    OFPBMC_BAD_NW_ADDR_MASK = 4;  /* Unsupported network addr mask - switch
-                                     does not support arbitrary network
-                                     address mask. */
-    OFPBMC_BAD_WILDCARDS    = 5;  /* Unsupported combination of fields masked
-                                     or omitted in the match. */
-    OFPBMC_BAD_FIELD        = 6;  /* Unsupported field type in the match. */
-    OFPBMC_BAD_VALUE        = 7;  /* Unsupported value in a match field. */
-    OFPBMC_BAD_MASK         = 8;  /* Unsupported mask specified in the match,
-                                     field is not dl-address or nw-address. */
-    OFPBMC_BAD_PREREQ       = 9;  /* A prerequisite was not met. */
-    OFPBMC_DUP_FIELD        = 10; /* A field type was duplicated. */
-    OFPBMC_EPERM            = 11; /* Permissions error. */
-};
-
-/* ofp_error_msg 'code' values for OFPET_FLOW_MOD_FAILED.  'data' contains
- * at least the first 64 bytes of the failed request. */
-enum ofp_flow_mod_failed_code {
-    OFPFMFC_UNKNOWN      = 0;   /* Unspecified error. */
-    OFPFMFC_TABLE_FULL   = 1;   /* Flow not added because table was full. */
-    OFPFMFC_BAD_TABLE_ID = 2;   /* Table does not exist */
-    OFPFMFC_OVERLAP      = 3;   /* Attempted to add overlapping flow with
-                                   CHECK_OVERLAP flag set. */
-    OFPFMFC_EPERM        = 4;   /* Permissions error. */
-    OFPFMFC_BAD_TIMEOUT  = 5;   /* Flow not added because of unsupported
-                                   idle/hard timeout. */
-    OFPFMFC_BAD_COMMAND  = 6;   /* Unsupported or unknown command. */
-    OFPFMFC_BAD_FLAGS    = 7;   /* Unsupported or unknown flags. */
-};
-
-/* ofp_error_msg 'code' values for OFPET_GROUP_MOD_FAILED.  'data' contains
- * at least the first 64 bytes of the failed request. */
-enum ofp_group_mod_failed_code {
-    OFPGMFC_GROUP_EXISTS         = 0;  /* Group not added because a group ADD
-                                          attempted to replace an
-                                          already-present group. */
-    OFPGMFC_INVALID_GROUP        = 1;  /* Group not added because Group
-                                          specified is invalid. */
-    OFPGMFC_WEIGHT_UNSUPPORTED   = 2;  /* Switch does not support unequal load
-                                          sharing with select groups. */
-    OFPGMFC_OUT_OF_GROUPS        = 3;  /* The group table is full. */
-    OFPGMFC_OUT_OF_BUCKETS       = 4;  /* The maximum number of action buckets
-                                          for a group has been exceeded. */
-    OFPGMFC_CHAINING_UNSUPPORTED = 5;  /* Switch does not support groups that
-                                          forward to groups. */
-    OFPGMFC_WATCH_UNSUPPORTED    = 6;  /* This group cannot watch the
-                                          watch_port or watch_group specified.
-                                        */
-    OFPGMFC_LOOP                 = 7;  /* Group entry would cause a loop. */
-    OFPGMFC_UNKNOWN_GROUP        = 8;  /* Group not modified because a group
-                                          MODIFY attempted to modify a
-                                          non-existent group. */
-    OFPGMFC_CHAINED_GROUP        = 9;  /* Group not deleted because another
-                                          group is forwarding to it. */
-    OFPGMFC_BAD_TYPE             = 10; /* Unsupported or unknown group type. */
-    OFPGMFC_BAD_COMMAND          = 11; /* Unsupported or unknown command. */
-    OFPGMFC_BAD_BUCKET           = 12; /* Error in bucket. */
-    OFPGMFC_BAD_WATCH            = 13; /* Error in watch port/group. */
-    OFPGMFC_EPERM                = 14; /* Permissions error. */
-};
-
-/* ofp_error_msg 'code' values for OFPET_PORT_MOD_FAILED.  'data' contains
- * at least the first 64 bytes of the failed request. */
-enum ofp_port_mod_failed_code {
-    OFPPMFC_BAD_PORT      = 0;   /* Specified port number does not exist. */
-    OFPPMFC_BAD_HW_ADDR   = 1;   /* Specified hardware address does not
-                                  * match the port number. */
-    OFPPMFC_BAD_CONFIG    = 2;   /* Specified config is invalid. */
-    OFPPMFC_BAD_ADVERTISE = 3;   /* Specified advertise is invalid. */
-    OFPPMFC_EPERM         = 4;   /* Permissions error. */
-};
-
-/* ofp_error_msg 'code' values for OFPET_TABLE_MOD_FAILED.  'data' contains
- * at least the first 64 bytes of the failed request. */
-enum ofp_table_mod_failed_code {
-    OFPTMFC_BAD_TABLE  = 0;      /* Specified table does not exist. */
-    OFPTMFC_BAD_CONFIG = 1;      /* Specified config is invalid. */
-    OFPTMFC_EPERM      = 2;      /* Permissions error. */
-};
-
-/* ofp_error msg 'code' values for OFPET_QUEUE_OP_FAILED. 'data' contains
- * at least the first 64 bytes of the failed request */
-enum ofp_queue_op_failed_code {
-    OFPQOFC_BAD_PORT   = 0;     /* Invalid port (or port does not exist). */
-    OFPQOFC_BAD_QUEUE  = 1;     /* Queue does not exist. */
-    OFPQOFC_EPERM      = 2;     /* Permissions error. */
-};
-
-/* ofp_error_msg 'code' values for OFPET_SWITCH_CONFIG_FAILED. 'data' contains
- * at least the first 64 bytes of the failed request. */
-enum ofp_switch_config_failed_code {
-    OFPSCFC_BAD_FLAGS  = 0;      /* Specified flags is invalid. */
-    OFPSCFC_BAD_LEN    = 1;      /* Specified len is invalid. */
-    OFPSCFC_EPERM      = 2;      /* Permissions error. */
-};
-
-/* ofp_error_msg 'code' values for OFPET_ROLE_REQUEST_FAILED. 'data' contains
- * at least the first 64 bytes of the failed request. */
-enum ofp_role_request_failed_code {
-    OFPRRFC_STALE      = 0;      /* Stale Message: old generation_id. */
-    OFPRRFC_UNSUP      = 1;      /* Controller role change unsupported. */
-    OFPRRFC_BAD_ROLE   = 2;      /* Invalid role. */
-};
-
-/* ofp_error_msg 'code' values for OFPET_METER_MOD_FAILED.  'data' contains
- * at least the first 64 bytes of the failed request. */
-enum ofp_meter_mod_failed_code {
-    OFPMMFC_UNKNOWN       = 0;  /* Unspecified error. */
-    OFPMMFC_METER_EXISTS  = 1;  /* Meter not added because a Meter ADD
-                                 * attempted to replace an existing Meter. */
-    OFPMMFC_INVALID_METER = 2;  /* Meter not added because Meter specified
-                                 * is invalid,
-                                 * or invalid meter in meter action. */
-    OFPMMFC_UNKNOWN_METER = 3;  /* Meter not modified because a Meter MODIFY
-                                 * attempted to modify a non-existent Meter,
-                                 * or bad meter in meter action. */
-    OFPMMFC_BAD_COMMAND   = 4;  /* Unsupported or unknown command. */
-    OFPMMFC_BAD_FLAGS     = 5;  /* Flag configuration unsupported. */
-    OFPMMFC_BAD_RATE      = 6;  /* Rate unsupported. */
-    OFPMMFC_BAD_BURST     = 7;  /* Burst size unsupported. */
-    OFPMMFC_BAD_BAND      = 8;  /* Band unsupported. */
-    OFPMMFC_BAD_BAND_VALUE = 9; /* Band value unsupported. */
-    OFPMMFC_OUT_OF_METERS = 10; /* No more meters available. */
-    OFPMMFC_OUT_OF_BANDS  = 11; /* The maximum number of properties
-                                 * for a meter has been exceeded. */
-};
-
-/* ofp_error_msg 'code' values for OFPET_TABLE_FEATURES_FAILED. 'data' contains
- * at least the first 64 bytes of the failed request. */
-enum ofp_table_features_failed_code {
-    OFPTFFC_BAD_TABLE    = 0;      /* Specified table does not exist. */
-    OFPTFFC_BAD_METADATA = 1;      /* Invalid metadata mask. */
-    OFPTFFC_BAD_TYPE     = 2;      /* Unknown property type. */
-    OFPTFFC_BAD_LEN      = 3;      /* Length problem in properties. */
-    OFPTFFC_BAD_ARGUMENT = 4;      /* Unsupported property value. */
-    OFPTFFC_EPERM        = 5;      /* Permissions error. */
-};
-
-/* OFPT_ERROR: Error message (datapath -> controller). */
-message ofp_error_msg {
-    //ofp_header header;
-    uint32 type = 1;
-    uint32 code = 2;
-    bytes data = 3;          /* Variable-length data.  Interpreted based
-                                 on the type and code.  No padding. */
-};
-
-/* OFPET_EXPERIMENTER: Error message (datapath -> controller). */
-message ofp_error_experimenter_msg {
-    //ofp_header header;
-
-    uint32 type = 1;           /* OFPET_EXPERIMENTER. */
-    uint32 exp_type = 2;       /* Experimenter defined. */
-    uint32 experimenter = 3;   /* Experimenter ID which takes the same form
-                                    as in struct ofp_experimenter_header. */
-    bytes data = 4;              /* Variable-length data.  Interpreted based
-                                    on the type and code.  No padding. */
-};
-
-enum ofp_multipart_type {
-    /* Description of this OpenFlow switch.
-     * The request body is empty.
-     * The reply body is struct ofp_desc. */
-    OFPMP_DESC = 0;
-
-    /* Individual flow statistics.
-     * The request body is struct ofp_flow_stats_request.
-     * The reply body is an array of struct ofp_flow_stats. */
-    OFPMP_FLOW = 1;
-
-    /* Aggregate flow statistics.
-     * The request body is struct ofp_aggregate_stats_request.
-     * The reply body is struct ofp_aggregate_stats_reply. */
-    OFPMP_AGGREGATE = 2;
-
-    /* Flow table statistics.
-     * The request body is empty.
-     * The reply body is an array of struct ofp_table_stats. */
-    OFPMP_TABLE = 3;
-
-    /* Port statistics.
-     * The request body is struct ofp_port_stats_request.
-     * The reply body is an array of struct ofp_port_stats. */
-    OFPMP_PORT_STATS = 4;
-
-    /* Queue statistics for a port
-     * The request body is struct ofp_queue_stats_request.
-     * The reply body is an array of struct ofp_queue_stats */
-    OFPMP_QUEUE = 5;
-
-    /* Group counter statistics.
-     * The request body is struct ofp_group_stats_request.
-     * The reply is an array of struct ofp_group_stats. */
-    OFPMP_GROUP = 6;
-
-    /* Group description.
-     * The request body is empty.
-     * The reply body is an array of struct ofp_group_desc. */
-    OFPMP_GROUP_DESC = 7;
-
-    /* Group features.
-     * The request body is empty.
-     * The reply body is struct ofp_group_features. */
-    OFPMP_GROUP_FEATURES = 8;
-
-    /* Meter statistics.
-     * The request body is struct ofp_meter_multipart_requests.
-     * The reply body is an array of struct ofp_meter_stats. */
-    OFPMP_METER = 9;
-
-    /* Meter configuration.
-     * The request body is struct ofp_meter_multipart_requests.
-     * The reply body is an array of struct ofp_meter_config. */
-    OFPMP_METER_CONFIG = 10;
-
-    /* Meter features.
-     * The request body is empty.
-     * The reply body is struct ofp_meter_features. */
-    OFPMP_METER_FEATURES = 11;
-
-    /* Table features.
-     * The request body is either empty or contains an array of
-     * struct ofp_table_features containing the controller's
-     * desired view of the switch. If the switch is unable to
-     * set the specified view an error is returned.
-     * The reply body is an array of struct ofp_table_features. */
-    OFPMP_TABLE_FEATURES = 12;
-
-    /* Port description.
-     * The request body is empty.
-     * The reply body is an array of struct ofp_port. */
-    OFPMP_PORT_DESC = 13;
-
-    /* Experimenter extension.
-     * The request and reply bodies begin with
-     * struct ofp_experimenter_multipart_header.
-     * The request and reply bodies are otherwise experimenter-defined. */
-    OFPMP_EXPERIMENTER = 0xffff;
-};
-
-/* Backward compatibility with 1.3.1 - avoid breaking the API. */
-//#define ofp_multipart_types ofp_multipart_type
-
-enum ofp_multipart_request_flags {
-    OFPMPF_REQ_INVALID = 0;
-    OFPMPF_REQ_MORE  = 1;  /* More requests to follow. */
-};
-
-message ofp_multipart_request {
-    //ofp_header header;
-    ofp_multipart_type type = 1; /* One of the OFPMP_* constants. */
-    uint32 flags = 2;            /* OFPMPF_REQ_* flags. */
-    bytes body = 3;              /* Body of the request. 0 or more bytes. */
-};
-
-enum ofp_multipart_reply_flags {
-    OFPMPF_REPLY_INVALID = 0;
-    OFPMPF_REPLY_MORE  = 1;  /* More replies to follow. */
-};
-
-message ofp_multipart_reply {
-    //ofp_header header;
-    ofp_multipart_type type = 1; /* One of the OFPMP_* constants. */
-    uint32 flags = 2;            /* OFPMPF_REPLY_* flags. */
-    bytes body = 3;              /* Body of the reply. 0 or more bytes. */
-};
-
-//#define DESC_STR_LEN   256
-//#define SERIAL_NUM_LEN 32
-/* Body of reply to OFPMP_DESC request.  Each entry is a NULL-terminated
- * ASCII string. */
-message ofp_desc {
-    string mfr_desc = 1;       /* Manufacturer description. */
-    string hw_desc = 2;        /* Hardware description. */
-    string sw_desc = 3;        /* Software description. */
-    string serial_num = 4;     /* Serial number. */
-    string dp_desc = 5;        /* Human readable description of datapath. */
-};
-
-/* Body for ofp_multipart_request of type OFPMP_FLOW. */
-message ofp_flow_stats_request {
-    uint32 table_id = 1;       /* ID of table to read (from ofp_table_stats),
-                                    OFPTT_ALL for all tables. */
-    uint32 out_port = 2;       /* Require matching entries to include this
-                                    as an output port.  A value of OFPP_ANY
-                                    indicates no restriction. */
-    uint32 out_group = 3;      /* Require matching entries to include this
-                                    as an output group.  A value of OFPG_ANY
-                                    indicates no restriction. */
-    uint64 cookie = 4;         /* Require matching entries to contain this
-                                    cookie value */
-    uint64 cookie_mask = 5;    /* Mask used to restrict the cookie bits that
-                                    must match. A value of 0 indicates
-                                    no restriction. */
-    ofp_match match = 6;         /* Fields to match. Variable size. */
-};
-
-/* Body of reply to OFPMP_FLOW request. */
-message ofp_flow_stats {
-    uint64 id = 14;            /* Unique ID of flow within device. */
-    uint32 table_id = 1;       /* ID of table flow came from. */
-    uint32 duration_sec = 2;   /* Time flow has been alive in seconds. */
-    uint32 duration_nsec = 3;  /* Time flow has been alive in nanoseconds
-                                  beyond duration_sec. */
-    uint32 priority = 4;       /* Priority of the entry. */
-    uint32 idle_timeout = 5;   /* Number of seconds idle before expiration. */
-    uint32 hard_timeout = 6;   /* Number of seconds before expiration. */
-    uint32 flags = 7;          /* Bitmap of OFPFF_* flags. */
-    uint64 cookie = 8;         /* Opaque controller-issued identifier. */
-    uint64 packet_count = 9;   /* Number of packets in flow. */
-    uint64 byte_count = 10;    /* Number of bytes in flow. */
-    ofp_match match = 12;      /* Description of fields. Variable size. */
-    repeated ofp_instruction instructions = 13; /* Instruction set
-                                                   (0 or more) */
-};
-
-/* Body for ofp_multipart_request of type OFPMP_AGGREGATE. */
-message ofp_aggregate_stats_request {
-    uint32 table_id = 1;      /* ID of table to read (from ofp_table_stats)
-                                 OFPTT_ALL for all tables. */
-    uint32 out_port = 2;      /* Require matching entries to include this
-                                 as an output port.  A value of OFPP_ANY
-                                 indicates no restriction. */
-    uint32 out_group = 3;     /* Require matching entries to include this
-                                 as an output group.  A value of OFPG_ANY
-                                 indicates no restriction. */
-    uint64 cookie = 4;        /* Require matching entries to contain this
-                                 cookie value */
-    uint64 cookie_mask = 5;   /* Mask used to restrict the cookie bits that
-                                 must match. A value of 0 indicates
-                                 no restriction. */
-    ofp_match match = 6;      /* Fields to match. Variable size. */
-};
-
-/* Body of reply to OFPMP_AGGREGATE request. */
-message ofp_aggregate_stats_reply {
-    uint64 packet_count = 1;   /* Number of packets in flows. */
-    uint64 byte_count = 2;     /* Number of bytes in flows. */
-    uint32 flow_count = 3;     /* Number of flows. */
-};
-
-/* Table Feature property types.
- * Low order bit cleared indicates a property for a regular Flow Entry.
- * Low order bit set indicates a property for the Table-Miss Flow Entry.
- */
-enum ofp_table_feature_prop_type {
-    OFPTFPT_INSTRUCTIONS           = 0;  /* Instructions property. */
-    OFPTFPT_INSTRUCTIONS_MISS      = 1;  /* Instructions for table-miss. */
-    OFPTFPT_NEXT_TABLES            = 2;  /* Next Table property. */
-    OFPTFPT_NEXT_TABLES_MISS       = 3;  /* Next Table for table-miss. */
-    OFPTFPT_WRITE_ACTIONS          = 4;  /* Write Actions property. */
-    OFPTFPT_WRITE_ACTIONS_MISS     = 5;  /* Write Actions for table-miss. */
-    OFPTFPT_APPLY_ACTIONS          = 6;  /* Apply Actions property. */
-    OFPTFPT_APPLY_ACTIONS_MISS     = 7;  /* Apply Actions for table-miss. */
-    OFPTFPT_MATCH                  = 8;  /* Match property. */
-    OFPTFPT_WILDCARDS              = 10; /* Wildcards property. */
-    OFPTFPT_WRITE_SETFIELD         = 12; /* Write Set-Field property. */
-    OFPTFPT_WRITE_SETFIELD_MISS    = 13; /* Write Set-Field for table-miss. */
-    OFPTFPT_APPLY_SETFIELD         = 14; /* Apply Set-Field property. */
-    OFPTFPT_APPLY_SETFIELD_MISS    = 15; /* Apply Set-Field for table-miss. */
-    OFPTFPT_EXPERIMENTER           = 0xFFFE; /* Experimenter property. */
-    OFPTFPT_EXPERIMENTER_MISS      = 0xFFFF; /* Experimenter for table-miss. */
-};
-
-/* Common header for all Table Feature Properties */
-message ofp_table_feature_property {
-    ofp_table_feature_prop_type type = 1;   /* One of OFPTFPT_*. */
-    oneof value {
-        ofp_table_feature_prop_instructions instructions = 2;
-        ofp_table_feature_prop_next_tables next_tables = 3;
-        ofp_table_feature_prop_actions actions = 4;
-        ofp_table_feature_prop_oxm oxm = 5;
-        ofp_table_feature_prop_experimenter experimenter = 6;
-    }
-};
-
-/* Instructions property */
-message ofp_table_feature_prop_instructions {
-    /* One of OFPTFPT_INSTRUCTIONS,
-       OFPTFPT_INSTRUCTIONS_MISS. */
-    repeated ofp_instruction instructions = 1;   /* List of instructions */
-};
-
-/* Next Tables property */
-message ofp_table_feature_prop_next_tables {
-    /* One of OFPTFPT_NEXT_TABLES,
-       OFPTFPT_NEXT_TABLES_MISS. */
-    repeated uint32 next_table_ids = 1;     /* List of table ids. */
-};
-
-/* Actions property */
-message ofp_table_feature_prop_actions {
-    /* One of OFPTFPT_WRITE_ACTIONS,
-       OFPTFPT_WRITE_ACTIONS_MISS,
-       OFPTFPT_APPLY_ACTIONS,
-       OFPTFPT_APPLY_ACTIONS_MISS. */
-    repeated ofp_action actions = 1; /* List of actions */
-};
-
-/* Match, Wildcard or Set-Field property */
-message ofp_table_feature_prop_oxm {
-    /* One of OFPTFPT_MATCH,
-       OFPTFPT_WILDCARDS,
-       OFPTFPT_WRITE_SETFIELD,
-       OFPTFPT_WRITE_SETFIELD_MISS,
-       OFPTFPT_APPLY_SETFIELD,
-       OFPTFPT_APPLY_SETFIELD_MISS. */
-    /* TODO is this a uint32??? */
-    repeated uint32 oxm_ids = 3;    /* Array of OXM headers */
-};
-
-/* Experimenter table feature property */
-message ofp_table_feature_prop_experimenter {
-    /* One of OFPTFPT_EXPERIMENTER,
-       OFPTFPT_EXPERIMENTER_MISS. */
-    uint32         experimenter = 2; /* Experimenter ID which takes the same
-                                        form as in struct
-                                        ofp_experimenter_header. */
-    uint32         exp_type = 3;      /* Experimenter defined. */
-    repeated uint32 experimenter_data = 4;
-};
-
-/* Body for ofp_multipart_request of type OFPMP_TABLE_FEATURES./
- * Body of reply to OFPMP_TABLE_FEATURES request. */
-message ofp_table_features {
-    uint32 table_id = 1;       /* Identifier of table.  Lower numbered tables
-                                are consulted first. */
-    string name = 2;
-    uint64 metadata_match = 3; /* Bits of metadata table can match. */
-    uint64 metadata_write = 4; /* Bits of metadata table can write. */
-    uint32 config = 5;         /* Bitmap of OFPTC_* values */
-    uint32 max_entries = 6;    /* Max number of entries supported. */
-
-    /* Table Feature Property list */
-    repeated ofp_table_feature_property properties = 7;
-};
-
-/* Body of reply to OFPMP_TABLE request. */
-message ofp_table_stats {
-    uint32 table_id = 1;      /* Identifier of table.  Lower numbered tables
-                                 are consulted first. */
-    uint32 active_count = 2;  /* Number of active entries. */
-    uint64 lookup_count = 3;  /* Number of packets looked up in table. */
-    uint64 matched_count = 4; /* Number of packets that hit table. */
-};
-
-/* Body for ofp_multipart_request of type OFPMP_PORT. */
-message ofp_port_stats_request {
-    uint32 port_no = 1;       /* OFPMP_PORT message must request statistics
-                               * either for a single port (specified in
-                               * port_no) or for all ports (if port_no ==
-                               * OFPP_ANY). */
-};
-
-/* Body of reply to OFPMP_PORT request. If a counter is unsupported, set
- * the field to all ones. */
-message ofp_port_stats {
-    uint32 port_no = 1;
-    uint64 rx_packets = 2;   /* Number of received packets. */
-    uint64 tx_packets = 3;   /* Number of transmitted packets. */
-    uint64 rx_bytes = 4;     /* Number of received bytes. */
-    uint64 tx_bytes = 5;     /* Number of transmitted bytes. */
-    uint64 rx_dropped = 6;   /* Number of packets dropped by RX. */
-    uint64 tx_dropped = 7;   /* Number of packets dropped by TX. */
-    uint64 rx_errors = 8;    /* Number of receive errors.  This is a super-set
-                                of more specific receive errors and should be
-                                greater than or equal to the sum of all
-                                rx_*_err values. */
-    uint64 tx_errors = 9;    /* Number of transmit errors.  This is a super-set
-                                of more specific transmit errors and should be
-                                greater than or equal to the sum of all
-                                tx_*_err values (none currently defined.) */
-    uint64 rx_frame_err = 10;  /* Number of frame alignment errors. */
-    uint64 rx_over_err = 11;   /* Number of packets with RX overrun. */
-    uint64 rx_crc_err = 12;    /* Number of CRC errors. */
-    uint64 collisions = 13;    /* Number of collisions. */
-    uint32 duration_sec = 14;  /* Time port has been alive in seconds. */
-    uint32 duration_nsec = 15; /* Time port has been alive in nanoseconds
-                                  beyond duration_sec. */
-};
-
-/* Body of OFPMP_GROUP request. */
-message ofp_group_stats_request {
-    uint32 group_id = 1;      /* All groups if OFPG_ALL. */
-};
-
-/* Used in group stats replies. */
-message ofp_bucket_counter {
-    uint64 packet_count = 1;  /* Number of packets processed by bucket. */
-    uint64 byte_count = 2;    /* Number of bytes processed by bucket. */
-};
-
-/* Body of reply to OFPMP_GROUP request. */
-message ofp_group_stats {
-    uint32 group_id = 1;      /* Group identifier. */
-    uint32 ref_count = 2;     /* Number of flows or groups that directly
-                                 forward to this group. */
-    uint64 packet_count = 3;  /* Number of packets processed by group. */
-    uint64 byte_count = 4;    /* Number of bytes processed by group. */
-    uint32 duration_sec = 5;  /* Time group has been alive in seconds. */
-    uint32 duration_nsec = 6; /* Time group has been alive in nanoseconds
-                                 beyond duration_sec. */
-    repeated ofp_bucket_counter bucket_stats = 7; /* One counter set per
-                                                     bucket. */
-};
-
-/* Body of reply to OFPMP_GROUP_DESC request. */
-message ofp_group_desc {
-    ofp_group_type type = 1;       /* One of OFPGT_*. */
-    uint32 group_id = 2;           /* Group identifier. */
-    repeated ofp_bucket buckets = 3;   /* List of buckets - 0 or more. */
-};
-
-message ofp_group_entry {
-    ofp_group_desc desc = 1;
-    ofp_group_stats stats = 2;
-};
-
-/* Backward compatibility with 1.3.1 - avoid breaking the API. */
-//#define ofp_group_desc_stats ofp_group_desc
-
-/* Group configuration flags */
-enum ofp_group_capabilities {
-    OFPGFC_INVALID         = 0;
-    OFPGFC_SELECT_WEIGHT   = 1;  /* Support weight for select groups */
-    OFPGFC_SELECT_LIVENESS = 2;  /* Support liveness for select groups */
-    OFPGFC_CHAINING        = 4;  /* Support chaining groups */
-    OFPGFC_CHAINING_CHECKS = 8;  /* Check chaining for loops and delete */
-};
-
-/* Body of reply to OFPMP_GROUP_FEATURES request. Group features. */
-message ofp_group_features {
-    uint32  types = 1;         /* Bitmap of (1 << OFPGT_*) values supported. */
-    uint32  capabilities = 2;  /* Bitmap of OFPGFC_* capability supported. */
-    repeated uint32 max_groups = 3; /* Maximum number of groups for each type.
-                                     */
-    repeated uint32 actions = 4;    /* Bitmaps of (1 << OFPAT_*) values
-                                       supported. */
-};
-
-/* Body of OFPMP_METER and OFPMP_METER_CONFIG requests. */
-message ofp_meter_multipart_request {
-    uint32 meter_id = 1;      /* Meter instance, or OFPM_ALL. */
-};
-
-/* Statistics for each meter band */
-message ofp_meter_band_stats {
-    uint64        packet_band_count = 1;  /* Number of packets in band. */
-    uint64        byte_band_count = 2;    /* Number of bytes in band. */
-};
-
-/* Body of reply to OFPMP_METER request. Meter statistics. */
-message ofp_meter_stats {
-    uint32        meter_id = 1;        /* Meter instance. */
-    uint32        flow_count = 2;      /* Number of flows bound to meter. */
-    uint64        packet_in_count = 3; /* Number of packets in input. */
-    uint64        byte_in_count = 4;   /* Number of bytes in input. */
-    uint32        duration_sec = 5; /* Time meter has been alive in seconds. */
-    uint32        duration_nsec = 6;/* Time meter has been alive in nanoseconds
-                                       beyond duration_sec. */
-    repeated ofp_meter_band_stats band_stats = 7; /* The band_stats length is
-                                         inferred from the length field. */
-};
-
-/* Body of reply to OFPMP_METER_CONFIG request. Meter configuration. */
-message ofp_meter_config {
-    uint32        flags = 1;           /* All OFPMF_* that apply. */
-    uint32        meter_id = 2;        /* Meter instance. */
-    repeated ofp_meter_band_header bands = 3; /* The bands length is
-                                             inferred from the length field. */
-};
-
-/* Body of reply to OFPMP_METER_FEATURES request. Meter features. */
-message ofp_meter_features {
-    uint32    max_meter = 1;    /* Maximum number of meters. */
-    uint32    band_types = 2;   /* Bitmaps of (1 << OFPMBT_*) values supported.
-                                 */
-    uint32    capabilities = 3; /* Bitmaps of "ofp_meter_flags". */
-    uint32    max_bands = 4;    /* Maximum bands per meters */
-    uint32    max_color = 5;    /* Maximum color value */
-};
-
-/* Body for ofp_multipart_request/reply of type OFPMP_EXPERIMENTER. */
-message ofp_experimenter_multipart_header {
-    uint32 experimenter = 1;   /* Experimenter ID which takes the same form
-                                  as in struct ofp_experimenter_header. */
-    uint32 exp_type = 2;       /* Experimenter defined. */
-    bytes data = 3; /* Experimenter-defined arbitrary additional data. */
-};
-
-/* Experimenter extension. */
-message ofp_experimenter_header {
-    //ofp_header header;  /* Type OFPT_EXPERIMENTER. */
-    uint32 experimenter = 1;     /* Experimenter ID:
-                                 * - MSB 0: low-order bytes are IEEE OUI.
-                                 * - MSB != 0: defined by ONF. */
-    uint32 exp_type = 2;         /* Experimenter defined. */
-    bytes data = 3; /* Experimenter-defined arbitrary additional data. */
-};
-
-/* All ones is used to indicate all queues in a port (for stats retrieval). */
-//#define OFPQ_ALL      0xffffffff
-
-/* Min rate > 1000 means not configured. */
-//#define OFPQ_MIN_RATE_UNCFG      0xffff
-
-/* Max rate > 1000 means not configured. */
-//#define OFPQ_MAX_RATE_UNCFG      0xffff
-
-enum ofp_queue_properties {
-    OFPQT_INVALID       = 0;
-    OFPQT_MIN_RATE      = 1;      /* Minimum datarate guaranteed. */
-    OFPQT_MAX_RATE      = 2;      /* Maximum datarate. */
-    OFPQT_EXPERIMENTER  = 0xffff; /* Experimenter defined property. */
-};
-
-/* Common description for a queue. */
-message ofp_queue_prop_header {
-    uint32 property = 1;   /* One of OFPQT_. */
-    uint32 len = 2;        /* Length of property, including this header. */
-};
-
-/* Min-Rate queue property description. */
-message ofp_queue_prop_min_rate {
-    ofp_queue_prop_header prop_header = 1;/* prop: OFPQT_MIN, len: 16. */
-    uint32 rate = 2;       /* In 1/10 of a percent = 0;>1000 -> disabled. */
-};
-
-/* Max-Rate queue property description. */
-message ofp_queue_prop_max_rate {
-    ofp_queue_prop_header prop_header = 1;/* prop: OFPQT_MAX, len: 16. */
-    uint32 rate = 2;       /* In 1/10 of a percent = 0;>1000 -> disabled. */
-};
-
-/* Experimenter queue property description. */
-message ofp_queue_prop_experimenter {
-    ofp_queue_prop_header prop_header = 1;/* prop: OFPQT_EXPERIMENTER */
-    uint32 experimenter = 2;         /* Experimenter ID which takes the same
-                                          form as in struct
-                                          ofp_experimenter_header. */
-    bytes data = 3;                    /* Experimenter defined data. */
-};
-
-/* Full description for a queue. */
-message ofp_packet_queue {
-    uint32 queue_id = 1;    /* id for the specific queue. */
-    uint32 port = 2;        /* Port this queue is attached to. */
-    repeated ofp_queue_prop_header properties = 4; /* List of properties. */
-};
-
-/* Query for port queue configuration. */
-message ofp_queue_get_config_request {
-    //ofp_header header;
-    uint32 port = 1;        /* Port to be queried. Should refer
-                              to a valid physical port (i.e. <= OFPP_MAX),
-                              or OFPP_ANY to request all configured
-                              queues.*/
-};
-
-/* Queue configuration for a given port. */
-message ofp_queue_get_config_reply {
-    //ofp_header header;
-    uint32 port = 1;
-    repeated ofp_packet_queue queues = 2; /* List of configured queues. */
-};
-
-/* OFPAT_SET_QUEUE action struct: send packets to given queue on port. */
-message ofp_action_set_queue {
-    uint32 type = 1;           /* OFPAT_SET_QUEUE. */
-    uint32 queue_id = 3;       /* Queue id for the packets. */
-};
-
-message ofp_queue_stats_request {
-    uint32 port_no = 1;       /* All ports if OFPP_ANY. */
-    uint32 queue_id = 2;      /* All queues if OFPQ_ALL. */
-};
-
-message ofp_queue_stats {
-    uint32 port_no = 1;
-    uint32 queue_id = 2;      /* Queue i.d */
-    uint64 tx_bytes = 3;      /* Number of transmitted bytes. */
-    uint64 tx_packets = 4;    /* Number of transmitted packets. */
-    uint64 tx_errors = 5;     /* Number of packets dropped due to overrun. */
-    uint32 duration_sec = 6;  /* Time queue has been alive in seconds. */
-    uint32 duration_nsec = 7; /* Time queue has been alive in nanoseconds
-                                 beyond duration_sec. */
-};
-
-/* Configures the "role" of the sending controller.  The default role is:
- *
- *    - Equal (OFPCR_ROLE_EQUAL), which allows the controller access to all
- *      OpenFlow features. All controllers have equal responsibility.
- *
- * The other possible roles are a related pair:
- *
- *    - Master (OFPCR_ROLE_MASTER) is equivalent to Equal, except that there
- *      may be at most one Master controller at a time: when a controller
- *      configures itself as Master, any existing Master is demoted to the
- *      Slave role.
- *
- *    - Slave (OFPCR_ROLE_SLAVE) allows the controller read-only access to
- *      OpenFlow features.  In particular attempts to modify the flow table
- *      will be rejected with an OFPBRC_EPERM error.
- *
- *      Slave controllers do not receive OFPT_PACKET_IN or OFPT_FLOW_REMOVED
- *      messages, but they do receive OFPT_PORT_STATUS messages.
- */
-
-/* Controller roles. */
-enum ofp_controller_role {
-    OFPCR_ROLE_NOCHANGE = 0;    /* Don't change current role. */
-    OFPCR_ROLE_EQUAL    = 1;    /* Default role, full access. */
-    OFPCR_ROLE_MASTER   = 2;    /* Full access, at most one master. */
-    OFPCR_ROLE_SLAVE    = 3;    /* Read-only access. */
-};
-
-/* Role request and reply message. */
-message ofp_role_request {
-    //ofp_header header;        /* Type OFPT_ROLE_REQUEST/OFPT_ROLE_REPLY. */
-    ofp_controller_role role = 1; /* One of OFPCR_ROLE_*. */
-    uint64 generation_id = 2;     /* Master Election Generation Id */
-};
-
-/* Asynchronous message configuration. */
-message ofp_async_config {
-    //ofp_header header;    /* OFPT_GET_ASYNC_REPLY or OFPT_SET_ASYNC. */
-    repeated uint32 packet_in_mask = 1;   /* Bitmasks of OFPR_* values. */
-    repeated uint32 port_status_mask = 2; /* Bitmasks of OFPPR_* values. */
-    repeated uint32 flow_removed_mask = 3;/* Bitmasks of OFPRR_* values. */
-};
-
-
-/* ADDITIONAL VOLTHA SPECIFIC MESSAGE TYPES, AIDING RPC CALLS */
-
-message FlowTableUpdate {
-    string id = 1;  // Device.id or LogicalDevice.id
-    ofp_flow_mod flow_mod = 2;
-}
-
-message FlowGroupTableUpdate {
-    string id = 1;  // Device.id or LogicalDevice.id
-    ofp_group_mod group_mod = 2;
-}
-
-message Flows {
-    repeated ofp_flow_stats items = 1;
-}
-
-message FlowGroups {
-    repeated ofp_group_entry items = 1;
-}
-
-message PacketIn {
-    string id = 1;  // LogicalDevice.id
-    ofp_packet_in packet_in = 2;
-}
-
-message PacketOut {
-    string id = 1;  // LogicalDevice.id
-    ofp_packet_out packet_out = 2;
-}
diff --git a/experiments/netconf/proto2yang/schema.proto b/experiments/netconf/proto2yang/schema.proto
index e75f696..1023f1a 100644
--- a/experiments/netconf/proto2yang/schema.proto
+++ b/experiments/netconf/proto2yang/schema.proto
@@ -21,6 +21,8 @@
     // Proto file name from which swagger.json shall be generated
     string swagger_from = 2;
 
+    // Proto file name from which yang schemas shall be generated
+    string yang_from = 3;
 }
 
 // Schema services
diff --git a/experiments/netconf/proto2yang/voltha.proto b/experiments/netconf/proto2yang/voltha.proto
index b76d903..a5ee22e 100644
--- a/experiments/netconf/proto2yang/voltha.proto
+++ b/experiments/netconf/proto2yang/voltha.proto
@@ -353,7 +353,6 @@
     rpc ActivateDevice(ID) returns(google.protobuf.Empty) {
         option (google.api.http) = {
             post: "/api/v1/local/devices/{id}/activate"
-            body: "{}"
         };
     }
 
diff --git a/experiments/netconf/proto2yang/voltha_orig.proto b/experiments/netconf/proto2yang/voltha_orig.proto
deleted file mode 100644
index f0d9aff..0000000
--- a/experiments/netconf/proto2yang/voltha_orig.proto
+++ /dev/null
@@ -1,421 +0,0 @@
-/*
- * Top-level Voltha API definition
- *
- * For details, see individual definition files.
- */
-
-syntax = "proto3";
-
-package voltha;
-
-import "google/protobuf/empty.proto";
-import "google/api/annotations.proto";
-
-import public "meta.proto";
-import public "common.proto";
-import public "health.proto";
-import public "logical_device.proto";
-import public "device.proto";
-import public "adapter.proto";
-import public "openflow_13.proto";
-
-option java_package = "org.opencord.voltha";
-option java_outer_classname = "VolthaProtos";
-option csharp_namespace = "Opencord.Voltha.Voltha";
-
-message DeviceGroup {
-
-    string id = 1 [(access) = READ_ONLY];
-
-    repeated LogicalDevice logical_devices = 2 [(child_node) = {key: "id"}];
-
-    repeated Device devices = 3 [(child_node) = {key: "id"}];
-}
-
-message DeviceGroups {
-    repeated DeviceGroup items = 1;
-}
-
-// Top-level (root) node for a Voltha Instance
-message VolthaInstance {
-
-    string instance_id = 1  [(access) = READ_ONLY];
-
-    string version = 2 [(access) = READ_ONLY];
-
-    LogLevel.LogLevel log_level = 3;
-
-    HealthStatus health = 10 [(child_node) = {}];
-
-    repeated Adapter adapters = 11 [(child_node) = {key: "id" }];
-
-    repeated LogicalDevice logical_devices = 12 [(child_node) = {key: "id"}];
-
-    repeated Device devices = 13 [(child_node) = {key: "id"}];
-
-    repeated DeviceType device_types = 14 [(child_node) = {key: "id"}];
-
-    repeated DeviceGroup device_groups = 15 [(child_node) = {key: "id"}];
-}
-
-message VolthaInstances {
-    repeated string items = 1;
-}
-
-// Voltha representing the entire Voltha cluster
-message Voltha {
-
-    string version = 1 [(access) = READ_ONLY];
-
-    LogLevel.LogLevel log_level = 2;
-
-    repeated VolthaInstance instances = 3 [(child_node) = {key: "instance_id"}];
-
-    repeated Adapter adapters = 11 [(child_node) = {key: "id"}];
-
-    repeated LogicalDevice logical_devices = 12 [(child_node) = {key: "id"}];
-
-    repeated Device devices = 13 [(child_node) = {key: "id"}];
-
-    repeated DeviceGroup device_groups = 15 [(child_node) = {key: "id"}];
-
-}
-
-
-/*
- * Cluster-wide Voltha APIs
- *
- * These APIs are potentially dispatched to the leader of the Voltha cluster,
- * to a specific Voltha instance which owns the given device or logical device.
- *
- */
-service VolthaGlobalService {
-
-    // Get high level information on the Voltha cluster
-    rpc GetVoltha(google.protobuf.Empty) returns(Voltha) {
-        option (google.api.http) = {
-            get: "/api/v1"
-        };
-    }
-
-    // List all Voltha cluster instances
-    rpc ListVolthaInstances(google.protobuf.Empty) returns(VolthaInstances) {
-        option (google.api.http) = {
-            get: "/api/v1/instances"
-        };
-    }
-
-    // Get details on a Voltha cluster instance
-    rpc GetVolthaInstance(ID) returns(VolthaInstance) {
-        option (google.api.http) = {
-            get: "/api/v1/instances/{id}"
-        };
-    }
-
-    // List all logical devices managed by the Voltha cluster
-    rpc ListLogicalDevices(google.protobuf.Empty) returns(LogicalDevices) {
-        option (google.api.http) = {
-            get: "/api/v1/logical_devices"
-        };
-    }
-
-    // Get additional information on a given logical device
-    rpc GetLogicalDevice(ID) returns(LogicalDevice) {
-        option (google.api.http) = {
-            get: "/api/v1/logical_devices/{id}"
-        };
-    }
-
-    // List ports of a logical device
-    rpc ListLogicalDevicePorts(ID) returns(LogicalPorts) {
-        option (google.api.http) = {
-            get: "/api/v1/logical_devices/{id}/ports"
-        };
-    }
-
-    // List all flows of a logical device
-    rpc ListLogicalDeviceFlows(ID) returns(openflow_13.Flows) {
-        option (google.api.http) = {
-            get: "/api/v1/logical_devices/{id}/flows"
-        };
-    }
-
-    // Update flow table for logical device
-    rpc UpdateLogicalDeviceFlowTable(openflow_13.FlowTableUpdate)
-            returns(google.protobuf.Empty) {
-        option (google.api.http) = {
-            post: "/api/v1/logical_devices/{id}/flows"
-            body: "*"
-        };
-    }
-
-    // List all flow groups of a logical device
-    rpc ListLogicalDeviceFlowGroups(ID) returns(openflow_13.FlowGroups) {
-        option (google.api.http) = {
-            get: "/api/v1/logical_devices/{id}/flow_groups"
-        };
-    }
-
-    // Update group table for device
-    rpc UpdateLogicalDeviceFlowGroupTable(openflow_13.FlowGroupTableUpdate)
-            returns(google.protobuf.Empty) {
-        option (google.api.http) = {
-            post: "/api/v1/logical_devices/{id}/flow_groups"
-            body: "*"
-        };
-    }
-
-    // List all physical devices controlled by the Voltha cluster
-    rpc ListDevices(google.protobuf.Empty) returns(Devices) {
-        option (google.api.http) = {
-            get: "/api/v1/devices"
-        };
-    }
-
-    // Get more information on a given physical device
-    rpc GetDevice(ID) returns(Device) {
-        option (google.api.http) = {
-            get: "/api/v1/devices/{id}"
-        };
-    }
-
-    // Pre-provision a new physical device
-    rpc CreateDevice(Device) returns(Device) {
-        option (google.api.http) = {
-            post: "/api/v1/devices"
-            body: "*"
-        };
-    }
-
-    // Activate a pre-provisioned device
-    rpc ActivateDevice(ID) returns(google.protobuf.Empty) {
-        option (google.api.http) = {
-            post: "/api/v1/devices/{id}/activate"
-        };
-    }
-
-    // List ports of a device
-    rpc ListDevicePorts(ID) returns(Ports) {
-        option (google.api.http) = {
-            get: "/api/v1/devices/{id}/ports"
-        };
-    }
-
-    // List all flows of a device
-    rpc ListDeviceFlows(ID) returns(openflow_13.Flows) {
-        option (google.api.http) = {
-            get: "/api/v1/devices/{id}/flows"
-        };
-    }
-
-    // List all flow groups of a device
-    rpc ListDeviceFlowGroups(ID) returns(openflow_13.FlowGroups) {
-        option (google.api.http) = {
-            get: "/api/v1/devices/{id}/flow_groups"
-        };
-    }
-
-    // List device types known to Voltha
-    rpc ListDeviceTypes(google.protobuf.Empty) returns(DeviceTypes) {
-        option (google.api.http) = {
-            get: "/api/v1/device_types"
-        };
-    }
-
-    // Get additional information on a device type
-    rpc GetDeviceType(ID) returns(DeviceType) {
-        option (google.api.http) = {
-            get: "/api/v1/device_types/{id}"
-        };
-    }
-
-    // List all device sharding groups
-    rpc ListDeviceGroups(google.protobuf.Empty) returns(DeviceGroups) {
-        option (google.api.http) = {
-            get: "/api/v1/device_groups"
-        };
-    }
-
-    // Get additional information on a device group
-    rpc GetDeviceGroup(ID) returns(DeviceGroup) {
-        option (google.api.http) = {
-            get: "/api/v1/device_groups/{id}"
-        };
-    }
-
-}
-
-/*
- * Per-instance APIs
- *
- * These APIs are always served locally by the Voltha instance on which the
- * call is made.
- */
-service VolthaLocalService {
-
-    // Get information on this Voltha instance
-    rpc GetVolthaInstance(google.protobuf.Empty) returns(VolthaInstance) {
-        option (google.api.http) = {
-            get: "/api/v1/local"
-        };
-    }
-
-    // Get the health state of the Voltha instance
-    rpc GetHealth(google.protobuf.Empty) returns(HealthStatus) {
-        option (google.api.http) = {
-            get: "/api/v1/local/health"
-        };
-    }
-
-    // List all active adapters (plugins) in this Voltha instance
-    rpc ListAdapters(google.protobuf.Empty) returns(Adapters) {
-        option (google.api.http) = {
-            get: "/api/v1/local/adapters"
-        };
-    }
-
-    // List all logical devices managed by this Voltha instance
-    rpc ListLogicalDevices(google.protobuf.Empty) returns(LogicalDevices) {
-        option (google.api.http) = {
-            get: "/api/v1/local/logical_devices"
-        };
-    }
-
-    // Get additional information on given logical device
-    rpc GetLogicalDevice(ID) returns(LogicalDevice) {
-        option (google.api.http) = {
-            get: "/api/v1/local/logical_devices/{id}"
-        };
-    }
-
-    // List ports of a logical device
-    rpc ListLogicalDevicePorts(ID) returns(LogicalPorts) {
-        option (google.api.http) = {
-            get: "/api/v1/local/logical_devices/{id}/ports"
-        };
-    }
-
-    // List all flows of a logical device
-    rpc ListLogicalDeviceFlows(ID) returns(openflow_13.Flows) {
-        option (google.api.http) = {
-            get: "/api/v1/local/logical_devices/{id}/flows"
-        };
-    }
-
-    // Update flow table for logical device
-    rpc UpdateLogicalDeviceFlowTable(openflow_13.FlowTableUpdate)
-            returns(google.protobuf.Empty) {
-        option (google.api.http) = {
-            post: "/api/v1/local/logical_devices/{id}/flows"
-            body: "*"
-        };
-    }
-
-    // List all flow groups of a logical device
-    rpc ListLogicalDeviceFlowGroups(ID) returns(openflow_13.FlowGroups) {
-        option (google.api.http) = {
-            get: "/api/v1/local/logical_devices/{id}/flow_groups"
-        };
-    }
-
-    // Update group table for logical device
-    rpc UpdateLogicalDeviceFlowGroupTable(openflow_13.FlowGroupTableUpdate)
-            returns(google.protobuf.Empty) {
-        option (google.api.http) = {
-            post: "/api/v1/local/logical_devices/{id}/flow_groups"
-            body: "*"
-        };
-    }
-
-    // List all physical devices managed by this Voltha instance
-    rpc ListDevices(google.protobuf.Empty) returns(Devices) {
-        option (google.api.http) = {
-            get: "/api/v1/local/devices"
-        };
-    }
-
-    // Get additional information on this device
-    rpc GetDevice(ID) returns(Device) {
-        option (google.api.http) = {
-            get: "/api/v1/local/devices/{id}"
-        };
-    }
-
-    // Pre-provision a new physical device
-    rpc CreateDevice(Device) returns(Device) {
-        option (google.api.http) = {
-            post: "/api/v1/local/devices"
-            body: "*"
-        };
-    }
-
-    // Activate a pre-provisioned device
-    rpc ActivateDevice(ID) returns(google.protobuf.Empty) {
-        option (google.api.http) = {
-            post: "/api/v1/local/devices/{id}/activate"
-            body: "{}"
-        };
-    }
-
-    // List ports of a device
-    rpc ListDevicePorts(ID) returns(Ports) {
-        option (google.api.http) = {
-            get: "/api/v1/local/devices/{id}/ports"
-        };
-    }
-
-    // List all flows of a device
-    rpc ListDeviceFlows(ID) returns(openflow_13.Flows) {
-        option (google.api.http) = {
-            get: "/api/v1/local/devices/{id}/flows"
-        };
-    }
-
-    // List all flow groups of a device
-    rpc ListDeviceFlowGroups(ID) returns(openflow_13.FlowGroups) {
-        option (google.api.http) = {
-            get: "/api/v1/local/devices/{id}/flow_groups"
-        };
-    }
-
-    // List device types know to Voltha instance
-    rpc ListDeviceTypes(google.protobuf.Empty) returns(DeviceTypes) {
-        option (google.api.http) = {
-            get: "/api/v1/local/device_types"
-        };
-    }
-
-    // Get additional information on given device type
-    rpc GetDeviceType(ID) returns(DeviceType) {
-        option (google.api.http) = {
-            get: "/api/v1/local/device_types/{id}"
-        };
-    }
-
-    // List device sharding groups managed by this Voltha instance
-    rpc ListDeviceGroups(google.protobuf.Empty) returns(DeviceGroups) {
-        option (google.api.http) = {
-            get: "/api/v1/local/device_groups"
-        };
-    }
-
-    // Get more information on given device shard
-    rpc GetDeviceGroup(ID) returns(DeviceGroup) {
-        option (google.api.http) = {
-            get: "/api/v1/local/device_groups/{id}"
-        };
-    }
-
-    // Stream control packets to the dataplane
-    rpc StreamPacketsOut(stream openflow_13.PacketOut)
-        returns(google.protobuf.Empty) {
-        // This does not have an HTTP representation
-    }
-
-    // Receive control packet stream
-    rpc ReceivePacketsIn(google.protobuf.Empty)
-        returns(stream openflow_13.PacketIn) {
-        // This does not have an HTTP representation
-    }
-
-}
diff --git a/netconf/grpc_client/grpc_client.py b/netconf/grpc_client/grpc_client.py
index ae19067..1c92f71 100644
--- a/netconf/grpc_client/grpc_client.py
+++ b/netconf/grpc_client/grpc_client.py
@@ -38,7 +38,8 @@
 from netconf.protos.schema_pb2 import SchemaServiceStub
 from google.protobuf.empty_pb2 import Empty
 from common.utils.consulhelpers import get_endpoint_from_consul
-from netconf.protos.voltha_pb2  import VolthaLocalServiceStub
+from netconf.protos.voltha_pb2  import VolthaLocalServiceStub, \
+    VolthaGlobalServiceStub
 from twisted.internet import threads
 from google.protobuf import empty_pb2
 from google.protobuf.json_format import MessageToDict, ParseDict
@@ -133,9 +134,9 @@
                 log.info('grpc-endpoint-connecting', host=host, port=port)
                 self.channel = grpc.insecure_channel('{}:{}'.format(host, port))
 
-                yang_from = self._retrieve_schema()
-                log.info('proto-to-yang-schema', file=yang_from)
-                self._compile_proto_files(yang_from)
+                # yang_from = self._retrieve_schema()
+                # log.info('proto-to-yang-schema', file=yang_from)
+                # self._compile_proto_files(yang_from)
                 self._clear_backoff()
 
                 if self.on_start_callback is not None:
@@ -146,6 +147,7 @@
                     reactor.callLater(0, self.reconnect_callback)
 
                 self.local_stub = VolthaLocalServiceStub(self.channel)
+                self.global_stub = VolthaGlobalServiceStub(self.channel)
 
                 return
 
@@ -286,3 +288,43 @@
         except Exception, e:
             log.error('failure', exception=repr(e))
 
+
+    #TODO: should be generated code
+    @inlineCallbacks
+    def invoke_voltha_api(self, key):
+        # key = ''.join([service, '-', method])
+        try:
+            if key == 'VolthaGlobalService-GetVoltha':
+                res = yield threads.deferToThread(
+                    self.global_stub.GetVoltha, empty_pb2.Empty())
+            elif key == 'VolthaLocalService-GetVolthaInstance':
+                res = yield threads.deferToThread(
+                    self.local_stub.GetVolthaInstance, empty_pb2.Empty())
+            elif key == 'VolthaLocalService-GetHealth':
+                res = yield threads.deferToThread(
+                    self.local_stub.GetHealth, empty_pb2.Empty())
+            elif key == 'VolthaLocalService-ListAdapters':
+                res = yield threads.deferToThread(
+                    self.local_stub.ListAdapters, empty_pb2.Empty())
+            elif key == 'VolthaLocalService-ListLogicalDevices':
+                res = yield threads.deferToThread(
+                    self.local_stub.ListLogicalDevices, empty_pb2.Empty())
+            elif key == 'VolthaLocalService-ListDevices':
+                res = yield threads.deferToThread(
+                    self.local_stub.ListDevices, empty_pb2.Empty())
+            elif key == 'VolthaLocalService-ListDeviceTypes':
+                res = yield threads.deferToThread(
+                    self.local_stub.ListDeviceTypes, empty_pb2.Empty())
+            elif key == 'VolthaLocalService-ListDeviceGroups':
+                res = yield threads.deferToThread(
+                    self.local_stub.ListDeviceGroups, empty_pb2.Empty())
+            else: # for now just return voltha instance data
+                res = yield threads.deferToThread(
+                    self.local_stub.GetVolthaInstance, empty_pb2.Empty())
+
+            out_data = MessageToDict(res, True, True)
+            returnValue(out_data)
+        except Exception, e:
+            log.error('failure', exception=repr(e))
+
+
diff --git a/netconf/nc_rpc/ext/get_voltha.py b/netconf/nc_rpc/ext/get_voltha.py
index 8977b89..271a20e 100644
--- a/netconf/nc_rpc/ext/get_voltha.py
+++ b/netconf/nc_rpc/ext/get_voltha.py
@@ -28,8 +28,9 @@
 
 
 class GetVoltha(Rpc):
-    def __init__(self, rpc_request, rpc_method, grpc_client, session):
-        super(GetVoltha, self).__init__(rpc_request, rpc_method,
+    def __init__(self, rpc_request, rpc_method, voltha_method_ref, grpc_client,
+                 session):
+        super(GetVoltha, self).__init__(rpc_request, rpc_method, voltha_method_ref,
                                         grpc_client, session)
         self._validate_parameters()
 
@@ -41,7 +42,9 @@
             returnValue(self.rpc_response)
 
         # Invoke voltha via the grpc client
-        res_dict = yield self.grpc_client.get_voltha_instance()
+        res_dict = yield self.grpc_client.invoke_voltha_api(self.voltha_method_ref)
+
+        # res_dict = yield self.grpc_client.get_voltha_instance()
 
         # convert dict to xml
         xml = dicttoxml.dicttoxml(res_dict)
diff --git a/netconf/nc_rpc/rpc.py b/netconf/nc_rpc/rpc.py
index ff9b303..fb35313 100644
--- a/netconf/nc_rpc/rpc.py
+++ b/netconf/nc_rpc/rpc.py
@@ -22,11 +22,13 @@
 import io
 
 class Rpc(object):
-    def __init__(self,rpc_request, rpc_method, grpc_client, session):
+    def __init__(self,rpc_request, rpc_method, voltha_method_ref,
+                 grpc_client, session):
         self.rpc_request = rpc_request
         self.rpc_method = rpc_method
         self.rpc_response = RpcResponse()
         self.grpc_client =  grpc_client
+        self.voltha_method_ref = voltha_method_ref
         self.session = session
 
     def execute(self):
diff --git a/netconf/nc_rpc/rpc_factory.py b/netconf/nc_rpc/rpc_factory.py
index 72b4734..e409198 100644
--- a/netconf/nc_rpc/rpc_factory.py
+++ b/netconf/nc_rpc/rpc_factory.py
@@ -31,109 +31,114 @@
 from ext.get_voltha import GetVoltha
 from netconf import NSMAP, qmap
 import netconf.nc_common.error as ncerror
+
 log = structlog.get_logger()
 from lxml import etree
 
 
 class RpcFactory:
+    instance = None
 
-	instance = None
+    def __init__(self):
+        self.rpc_map = {}
+        # TODO:  This will be loaded after the yang modules have been
+        # generated from proto files
+        self.register_rpc('{urn:opencord:params:xml:ns:voltha:ietf-voltha}',
+                          'VolthaGlobalService', 'GetVoltha', GetVoltha)
+        self.register_rpc('{urn:opencord:params:xml:ns:voltha:ietf-voltha}',
+                          'any', 'any', GetVoltha)
 
-	def __init__(self):
-		self.rpc_map = {}
-		#TODO:  This will be loaded after the yang modules have been
-		# generated from proto files
-		self.register_rpc('{urn:opencord:params:xml:ns:voltha:ietf-voltha}',
-						 'VolthaGlobalService', 'GetVoltha', GetVoltha)
+    def _get_key(self, namespace, service, name):
+        return ''.join([namespace, service, name])
 
-	def _get_key(self, namespace, service, name):
-		return ''.join([namespace,service,name])
+    def register_rpc(self, namespace, service, name, klass):
+        key = self._get_key(namespace, service, name)
+        if key not in self.rpc_map.keys():
+            self.rpc_map[key] = klass
 
-	def register_rpc(self, namespace, service, name, klass):
-		key = self._get_key(namespace, service, name)
-		if key not in self.rpc_map.keys():
-			self.rpc_map[key] = klass
+    def get_handler(self, namespace, service, name):
+        key = self._get_key(namespace, service, name)
+        if key in self.rpc_map.keys():
+            return self.rpc_map[key]
 
-	def get_handler(self, namespace, service, name):
-		key = self._get_key(namespace, service, name)
-		if key in self.rpc_map.keys():
-			return self.rpc_map[key]
+    def get_rpc_handler(self, rpc_node, msg, grpc_channel, session):
+        try:
+            msg_id = rpc_node.get('message-id')
+            log.info("Received-rpc-message-id", msg_id=msg_id)
 
+        except (TypeError, ValueError):
+            raise ncerror.SessionError(msg,
+                                       "No valid message-id attribute found")
 
-	def get_rpc_handler(self, rpc_node, msg, grpc_channel, session):
-		try:
-			msg_id = rpc_node.get('message-id')
-			log.info("Received-rpc-message-id", msg_id=msg_id)
+        log.info("rpc-node", node=etree.tostring(rpc_node, pretty_print=True))
 
-		except (TypeError, ValueError):
-			raise ncerror.SessionError(msg,
-									   "No valid message-id attribute found")
+        # Get the first child of rpc as the method name
+        rpc_method = rpc_node.getchildren()
+        if len(rpc_method) != 1:
+            log.error("badly-formatted-rpc-method", msg_id=msg_id)
+            raise ncerror.BadMsg(rpc_node)
 
-		log.info("rpc-node", node=etree.tostring(rpc_node, pretty_print=True))
+        rpc_method = rpc_method[0]
 
-		# Get the first child of rpc as the method name
-		rpc_method = rpc_node.getchildren()
-		if len(rpc_method) != 1:
-			log.error("badly-formatted-rpc-method", msg_id=msg_id)
-			raise ncerror.BadMsg(rpc_node)
+        if rpc_method.prefix is None:
+            log.error("rpc-method-has-no-prefix", msg_id=msg_id)
+            raise ncerror.BadMsg(rpc_node)
 
-		rpc_method = rpc_method[0]
+        try:
+            # extract the namespace, service and name
+            namespace = ''.join(
+                ['{', rpc_method.nsmap[rpc_method.prefix], '}'])
+            # rpc_name = rpc_method.tag.replace(qmap('nc'), "")
+            rpc = rpc_method.tag.replace(namespace, "").split('-')
+            rpc_service = rpc[0]
+            rpc_name = rpc[1]
+            log.info("rpc-request",
+                     namespace=namespace,
+                     service=rpc_service,
+                     name=rpc_name)
+        except Exception as e:
+            log.error("rpc-parsing-error", exception=repr(e))
+            raise ncerror.BadMsg(rpc_node)
 
-		if rpc_method.prefix is None:
-			log.error("rpc-method-has-no-prefix", msg_id=msg_id)
-			raise ncerror.BadMsg(rpc_node)
+        class_handler = self.get_handler(namespace, rpc_service, rpc_name)
+        if class_handler is None:
+            # TODO: for now just assume anything in voltha namespace will be
+            #  handled by the same api
+            class_handler = self.get_handler(namespace, 'any', 'any')
 
-		try:
-			# extract the namespace, service and name
-			namespace = ''.join(['{', rpc_method.nsmap[rpc_method.prefix], '}'])
-			# rpc_name = rpc_method.tag.replace(qmap('nc'), "")
-			rpc = rpc_method.tag.replace(namespace, "").split('-')
-			rpc_service = rpc[0]
-			rpc_name = rpc[1]
-			log.info("rpc-request",
-					 namespace=namespace,
-					 service=rpc_service,
-					 name=rpc_name)
-		except Exception as e:
-			log.error("rpc-parsing-error", exception=repr(e))
-			raise ncerror.BadMsg(rpc_node)
+        voltha_method_ref = ''.join([rpc_service, '-', rpc_name])
+        if class_handler is not None:
+            return class_handler(rpc_node, rpc_method, voltha_method_ref,
+                                 grpc_channel, session)
 
-		class_handler = self.get_handler(namespace, rpc_service, rpc_name)
+        log.error("rpc-not-implemented", rpc=rpc_name)
 
-		# class_handler = self.rpc_class_handlers.get(rpc_name, None)
-		if class_handler is not None:
-			return class_handler(rpc_node, rpc_method, grpc_channel, session)
-
-		log.error("rpc-not-implemented", rpc=rpc_name)
-
-
-	rpc_class_handlers = {
-		'getvoltha' : GetVoltha,
-		'get-config': GetConfig,
-		'get': Get,
-		'edit-config': EditConfig,
-		'copy-config': CopyConfig,
-		'delete-config': DeleteConfig,
-		'commit': Commit,
-		'lock': Lock,
-		'unlock': UnLock,
-		'close-session': CloseSession,
-		'kill-session': KillSession
-	}
-
+    rpc_class_handlers = {
+        'getvoltha': GetVoltha,
+        'get-config': GetConfig,
+        'get': Get,
+        'edit-config': EditConfig,
+        'copy-config': CopyConfig,
+        'delete-config': DeleteConfig,
+        'commit': Commit,
+        'lock': Lock,
+        'unlock': UnLock,
+        'close-session': CloseSession,
+        'kill-session': KillSession
+    }
 
 
 def get_rpc_factory_instance():
-	if RpcFactory.instance == None:
-		RpcFactory.instance = RpcFactory()
-	return RpcFactory.instance
+    if RpcFactory.instance == None:
+        RpcFactory.instance = RpcFactory()
+    return RpcFactory.instance
 
 
 if __name__ == '__main__':
-   fac = get_rpc_factory_instance()
-   fac.register_rpc('urn:opencord:params:xml:ns:voltha:ietf-voltha',
-					'VolthaGlobalService', 'GetVoltha', GetVoltha)
-   rpc = fac.get_handler('urn:opencord:params:xml:ns:voltha:ietf-voltha',
-					'VolthaGlobalService', 'GetVoltha')
-   # rpc = fac.rpc_class_handlers.get('getvoltha', None)
-   print rpc(None,None,None, None)
\ No newline at end of file
+    fac = get_rpc_factory_instance()
+    fac.register_rpc('urn:opencord:params:xml:ns:voltha:ietf-voltha',
+                     'VolthaGlobalService', 'GetVoltha', GetVoltha)
+    rpc = fac.get_handler('urn:opencord:params:xml:ns:voltha:ietf-voltha',
+                          'VolthaGlobalService', 'GetVoltha')
+    # rpc = fac.rpc_class_handlers.get('getvoltha', None)
+    print rpc(None, None, None, None)