Refactor GoVPP

Squashed commit of the following:

commit 348930db31575e9f59b3834d9fec07411f011e05
Author: Ondrej Fabry <ofabry@cisco.com>
Date:   Wed Aug 15 11:30:13 2018 +0200

    Use debug level for log about different context

commit 9fc963c559cea67a41b85c6cdadc322fb3b1fc7c
Author: Ondrej Fabry <ofabry@cisco.com>
Date:   Wed Aug 15 11:22:03 2018 +0200

    Remove annoying logs and add env vars for debugging

commit fdc9fd624d13feadb602e0d03d58f8a44b7a565f
Author: Ondrej Fabry <ofabry@cisco.com>
Date:   Wed Aug 15 11:18:47 2018 +0200

    Fix printing unknown VPPApiError

commit 8f968be36a91de4d4a8ea17593ba314f82aa9583
Author: Ondrej Fabry <ofabry@cisco.com>
Date:   Tue Aug 14 17:25:10 2018 +0200

    Refactor entire GoVPP

    - fix some cases with inconsistent VPP messages, causing messages
      to be incorrectly identified as event or request
    - simplify API, remove direct access to internal Go channels
    - add module name with message to registration of messages
    - start watching filesystem only when vpe-api file does not exist
    - simplify code in message codec and remove unneeded parts
    - retrieve IDs of all registered messages after connect to VPP
    - define fallback for control ping in core to avoid duplicate registration
    - add SetLogLevel function to set logger level more easily
    - remove lot of unused code

commit 34dd1b7e10ef0324aa8c4e4cc42375bd6021c6cb
Author: Ondrej Fabry <ofabry@cisco.com>
Date:   Mon Aug 13 11:29:54 2018 +0200

    Rename VnetError to VPPApiError

commit c6549d6f77847a1367a12ff47fb716e2955e973a
Author: Ondrej Fabry <ofabry@cisco.com>
Date:   Mon Aug 13 10:23:43 2018 +0200

    Fix examples and regenerate binapi

commit 4612e36b416779771f5efab4fc654c2766d2cb1c
Author: Ondrej Fabry <ofabry@cisco.com>
Date:   Mon Aug 13 09:51:22 2018 +0200

    Add parsing and generation for services

commit ac9c5280c5aa27e325f327609e2364cc66f3723f
Author: Ondrej Fabry <ofabry@cisco.com>
Date:   Fri Aug 10 14:30:15 2018 +0200

    Fix exit status on error and add continue-onerror flag

commit 9b3f4ef9fc7c8c62037fa107085eae18a8725314
Author: Ondrej Fabry <ofabry@cisco.com>
Date:   Thu Aug 9 15:20:56 2018 +0200

    Return VnetError when Retval != 0

commit 8fd21a907b5e628ec4d2026215b83d15da96c297
Author: Ondrej Fabry <ofabry@cisco.com>
Date:   Thu Aug 9 14:59:05 2018 +0200

    Add all missing errors from api_errno.h

commit 08450f288d3046ebaecf40203174ae342a07f1eb
Author: Ondrej Fabry <ofabry@cisco.com>
Date:   Thu Aug 9 14:29:27 2018 +0200

    Update README

commit d8dced0728dd62243539be741868fb7d9b8de4cc
Author: Ondrej Fabry <ofabry@cisco.com>
Date:   Thu Aug 9 13:59:59 2018 +0200

    Regenerate vpe in core

commit 254da7592cdbf634cf7aa46ae36ce7bb6d4ee555
Author: Ondrej Fabry <ofabry@cisco.com>
Date:   Thu Aug 9 13:37:00 2018 +0200

    Add VnetError type for Retvals

commit 4475c1087fb53ab4c788e530bc7fef7cfc89d2cd
Author: Ondrej Fabry <ofabry@cisco.com>
Date:   Thu Aug 9 13:36:07 2018 +0200

    Add registration API

commit 892a3ea5a2c703e2f7c29331663f6a6fa706bff5
Author: Ondrej Fabry <ofabry@cisco.com>
Date:   Thu Aug 9 13:30:43 2018 +0200

    Generate registration for messages and check all IDs on connect

commit 389ed03b6e7082260281866c3449d72d72347c99
Author: Ondrej Fabry <ofabry@cisco.com>
Date:   Thu Aug 9 11:32:41 2018 +0200

    Show error for empty adapter (on Darwin/Windows)

commit ef1ea040d656ade64242432dc5f06810ed8dcde6
Author: Ondrej Fabry <ofabry@cisco.com>
Date:   Thu Aug 9 11:31:37 2018 +0200

    Improve logged info

commit d4adae3b14ed54c8d693060dd857fa9ba5ec8e06
Author: Ondrej Fabry <ofabry@cisco.com>
Date:   Thu Aug 9 11:27:48 2018 +0200

    Update examples

commit 63921e1346014701a22639a2611129563bb1eb78
Author: Ondrej Fabry <ofabry@cisco.com>
Date:   Thu Aug 9 11:02:56 2018 +0200

    Generate unions and fix some issues

    - add comments between sections
    - define structs on single line if it has no fields
    - generate unions with setters/getters for each field
    - fix detection of message type

commit 6ab3e3fa590b245898306a6ffaf32c7721eab60c
Author: Ondrej Fabry <ofabry@cisco.com>
Date:   Wed Aug 8 15:37:10 2018 +0200

    Refactor binapi-generator

    - split JSON parsing from code generation
    - parse and generate enums
    - parse unions (no generation yet)
    - change output file suffix to '.ba.go'
    - cleanup and simplify code
    - split code into files
    - add flag for debug mode

Change-Id: I58f685e0d4c7a38e9a7b6ea0a1f47792d95d7399
Signed-off-by: Ondrej Fabry <ofabry@cisco.com>

2 files changed, 320 insertions, 53 deletions

diff --git a/api/api.go b/api/api.go
index 9c68ab9..39fe60f 100644
--- a/api/api.go
+++ b/api/api.go
@@ -15,10 +15,15 @@
 package api
 
 import (
+	"fmt"
 	"time"
 )
 
 // MessageType represents the type of a VPP message.
+// Note: this is currently derived from the message header (fields),
+// and in many cases it does not represent the actual type of VPP message.
+// This means that some replies can be identified as requests, etc.
+// TODO: use services to identify type of message
 type MessageType int
 
 const (
@@ -26,9 +31,9 @@ const (
 	RequestMessage MessageType = iota
 	// ReplyMessage represents a VPP reply message
 	ReplyMessage
-	// EventMessage represents a VPP notification event message
+	// EventMessage represents a VPP event message
 	EventMessage
-	// OtherMessage represents other VPP message (e.g. counters)
+	// OtherMessage represents other VPP message
 	OtherMessage
 )
 
@@ -37,11 +42,11 @@ type Message interface {
 	// GetMessageName returns the original VPP name of the message, as defined in the VPP API.
 	GetMessageName() string
 
-	// GetMessageType returns the type of the VPP message.
-	GetMessageType() MessageType
-
 	// GetCrcString returns the string with CRC checksum of the message definition (the string represents a hexadecimal number).
 	GetCrcString() string
+
+	// GetMessageType returns the type of the VPP message.
+	GetMessageType() MessageType
 }
 
 // DataType is an interface that is implemented by all VPP Binary API data types by the binapi_generator.
@@ -53,17 +58,6 @@ type DataType interface {
 	GetCrcString() string
 }
 
-// ChannelProvider provides the communication channel with govpp core.
-type ChannelProvider interface {
-	// NewAPIChannel returns a new channel for communication with VPP via govpp core.
-	// It uses default buffer sizes for the request and reply Go channels.
-	NewAPIChannel() (Channel, error)
-
-	// NewAPIChannelBuffered returns a new channel for communication with VPP via govpp core.
-	// It allows to specify custom buffer sizes for the request and reply Go channels.
-	NewAPIChannelBuffered(reqChanBufSize, replyChanBufSize int) (Channel, error)
-}
-
 // MessageDecoder provides functionality for decoding binary data to generated API messages.
 type MessageDecoder interface {
 	// DecodeMsg decodes binary-encoded data of a message into provided Message structure.
@@ -74,43 +68,48 @@ type MessageDecoder interface {
 type MessageIdentifier interface {
 	// GetMessageID returns message identifier of given API message.
 	GetMessageID(msg Message) (uint16, error)
+
 	// LookupByID looks up message name and crc by ID
-	LookupByID(ID uint16) (string, error)
+	LookupByID(msgID uint16) (Message, error)
+}
+
+// ChannelProvider provides the communication channel with govpp core.
+type ChannelProvider interface {
+	// NewAPIChannel returns a new channel for communication with VPP via govpp core.
+	// It uses default buffer sizes for the request and reply Go channels.
+	NewAPIChannel() (Channel, error)
+
+	// NewAPIChannelBuffered returns a new channel for communication with VPP via govpp core.
+	// It allows to specify custom buffer sizes for the request and reply Go channels.
+	NewAPIChannelBuffered(reqChanBufSize, replyChanBufSize int) (Channel, error)
 }
 
 // Channel provides methods for direct communication with VPP channel.
 type Channel interface {
+	// GetID returns channel's ID
+	GetID() uint16
+
 	// SendRequest asynchronously sends a request to VPP. Returns a request context, that can be used to call ReceiveReply.
 	// In case of any errors by sending, the error will be delivered to ReplyChan (and returned by ReceiveReply).
 	SendRequest(msg Message) RequestCtx
+
 	// SendMultiRequest asynchronously sends a multipart request (request to which multiple responses are expected) to VPP.
 	// Returns a multipart request context, that can be used to call ReceiveReply.
 	// In case of any errors by sending, the error will be delivered to ReplyChan (and returned by ReceiveReply).
 	SendMultiRequest(msg Message) MultiRequestCtx
+
 	// SubscribeNotification subscribes for receiving of the specified notification messages via provided Go channel.
 	// Note that the caller is responsible for creating the Go channel with preferred buffer size. If the channel's
 	// buffer is full, the notifications will not be delivered into it.
 	SubscribeNotification(notifChan chan Message, msgFactory func() Message) (*NotifSubscription, error)
+
 	// UnsubscribeNotification unsubscribes from receiving the notifications tied to the provided notification subscription.
 	UnsubscribeNotification(subscription *NotifSubscription) error
-	// CheckMessageCompatibility checks whether provided messages are compatible with the version of VPP
-	// which the library is connected to.
-	CheckMessageCompatibility(messages ...Message) error
+
 	// SetReplyTimeout sets the timeout for replies from VPP. It represents the maximum time the API waits for a reply
 	// from VPP before returning an error.
 	SetReplyTimeout(timeout time.Duration)
-	// GetRequestChannel returns request go channel of the VPP channel
-	GetRequestChannel() chan<- *VppRequest
-	// GetReplyChannel returns reply go channel of the VPP channel
-	GetReplyChannel() <-chan *VppReply
-	// GetNotificationChannel returns notification go channel of the VPP channel
-	GetNotificationChannel() chan<- *NotifSubscribeRequest
-	// GetNotificationReplyChannel returns notification reply go channel of the VPP channel
-	GetNotificationReplyChannel() <-chan error
-	// GetMessageDecoder returns message decoder instance
-	GetMessageDecoder() MessageDecoder
-	// GetID returns channel's ID
-	GetID() uint16
+
 	// Close closes the API channel and releases all API channel-related resources in the ChannelProvider.
 	Close()
 }
@@ -131,30 +130,24 @@ type MultiRequestCtx interface {
 	ReceiveReply(msg Message) (lastReplyReceived bool, err error)
 }
 
-// VppRequest is a request that will be sent to VPP.
-type VppRequest struct {
-	SeqNum    uint16  // sequence number
-	Message   Message // binary API message to be send to VPP
-	Multipart bool    // true if multipart response is expected, false otherwise
+// NotifSubscription represents a subscription for delivery of specific notification messages.
+type NotifSubscription struct {
+	NotifChan  chan Message   // channel where notification messages will be delivered to
+	MsgFactory func() Message // function that returns a new instance of the specific message that is expected as a notification
+	// TODO: use Message directly here, not a factory, eliminating need to allocation
 }
 
-// VppReply is a reply received from VPP.
-type VppReply struct {
-	MessageID         uint16 // ID of the message
-	SeqNum            uint16 // sequence number
-	Data              []byte // encoded data with the message - MessageDecoder can be used for decoding
-	LastReplyReceived bool   // in case of multipart replies, true if the last reply has been already received and this one should be ignored
-	Error             error  // in case of error, data is nil and this member contains error description
-}
+var registeredMessages = make(map[string]Message)
 
-// NotifSubscribeRequest is a request to subscribe for delivery of specific notification messages.
-type NotifSubscribeRequest struct {
-	Subscription *NotifSubscription // subscription details
-	Subscribe    bool               // true if this is a request to subscribe, false if unsubscribe
+// RegisterMessage is called from generated code to register message.
+func RegisterMessage(x Message, name string) {
+	if _, ok := registeredMessages[name]; ok {
+		panic(fmt.Errorf("govpp: duplicate message registered: %s (%s)", name, x.GetCrcString()))
+	}
+	registeredMessages[name] = x
 }
 
-// NotifSubscription represents a subscription for delivery of specific notification messages.
-type NotifSubscription struct {
-	NotifChan  chan Message   // channel where notification messages will be delivered to
-	MsgFactory func() Message // function that returns a new instance of the specific message that is expected as a notification
+// GetAllMessages returns list of all registered messages.
+func GetAllMessages() map[string]Message {
+	return registeredMessages
 }
diff --git a/api/vppapi_errors.go b/api/vppapi_errors.go
new file mode 100644
index 0000000..c921e14
--- /dev/null
+++ b/api/vppapi_errors.go
@@ -0,0 +1,274 @@
+package api
+
+import (
+	"fmt"
+	"strconv"
+)
+
+// VPPApiError represents VPP's vnet API error that is usually
+// returned as Retval field in replies from VPP binary API.
+type VPPApiError int32
+
+func (e VPPApiError) Error() string {
+	var errstr string
+	if s, ok := vppApiErrors[e]; ok {
+		errstr = s
+	} else {
+		errstr = strconv.Itoa(int(e))
+	}
+	return fmt.Sprintf("VPPApiError: %s", errstr)
+}
+
+// definitions from: vpp/src/vnet/api_errno.h
+const (
+	_                                  VPPApiError = 0
+	UNSPECIFIED                                    = -1
+	INVALID_SW_IF_INDEX                            = -2
+	NO_SUCH_FIB                                    = -3
+	NO_SUCH_INNER_FIB                              = -4
+	NO_SUCH_LABEL                                  = -5
+	NO_SUCH_ENTRY                                  = -6
+	INVALID_VALUE                                  = -7
+	INVALID_VALUE_2                                = -8
+	UNIMPLEMENTED                                  = -9
+	INVALID_SW_IF_INDEX_2                          = -10
+	SYSCALL_ERROR_1                                = -11
+	SYSCALL_ERROR_2                                = -12
+	SYSCALL_ERROR_3                                = -13
+	SYSCALL_ERROR_4                                = -14
+	SYSCALL_ERROR_5                                = -15
+	SYSCALL_ERROR_6                                = -16
+	SYSCALL_ERROR_7                                = -17
+	SYSCALL_ERROR_8                                = -18
+	SYSCALL_ERROR_9                                = -19
+	SYSCALL_ERROR_10                               = -20
+	FEATURE_DISABLED                               = -30
+	INVALID_REGISTRATION                           = -31
+	NEXT_HOP_NOT_IN_FIB                            = -50
+	UNKNOWN_DESTINATION                            = -51
+	PREFIX_MATCHES_NEXT_HOP                        = -52
+	NEXT_HOP_NOT_FOUND_MP                          = -53
+	NO_MATCHING_INTERFACE                          = -54
+	INVALID_VLAN                                   = -55
+	VLAN_ALREADY_EXISTS                            = -56
+	INVALID_SRC_ADDRESS                            = -57
+	INVALID_DST_ADDRESS                            = -58
+	ADDRESS_LENGTH_MISMATCH                        = -59
+	ADDRESS_NOT_FOUND_FOR_INTERFACE                = -60
+	ADDRESS_NOT_LINK_LOCAL                         = -61
+	IP6_NOT_ENABLED                                = -62
+	IN_PROGRESS                                    = 10
+	NO_SUCH_NODE                                   = -63
+	NO_SUCH_NODE2                                  = -64
+	NO_SUCH_TABLE                                  = -65
+	NO_SUCH_TABLE2                                 = -66
+	NO_SUCH_TABLE3                                 = -67
+	SUBIF_ALREADY_EXISTS                           = -68
+	SUBIF_CREATE_FAILED                            = -69
+	INVALID_MEMORY_SIZE                            = -70
+	INVALID_INTERFACE                              = -71
+	INVALID_VLAN_TAG_COUNT                         = -72
+	INVALID_ARGUMENT                               = -73
+	UNEXPECTED_INTF_STATE                          = -74
+	TUNNEL_EXIST                                   = -75
+	INVALID_DECAP_NEXT                             = -76
+	RESPONSE_NOT_READY                             = -77
+	NOT_CONNECTED                                  = -78
+	IF_ALREADY_EXISTS                              = -79
+	BOND_SLAVE_NOT_ALLOWED                         = -80
+	VALUE_EXIST                                    = -81
+	SAME_SRC_DST                                   = -82
+	IP6_MULTICAST_ADDRESS_NOT_PRESENT              = -83
+	SR_POLICY_NAME_NOT_PRESENT                     = -84
+	NOT_RUNNING_AS_ROOT                            = -85
+	ALREADY_CONNECTED                              = -86
+	UNSUPPORTED_JNI_VERSION                        = -87
+	FAILED_TO_ATTACH_TO_JAVA_THREAD                = -88
+	INVALID_WORKER                                 = -89
+	LISP_DISABLED                                  = -90
+	CLASSIFY_TABLE_NOT_FOUND                       = -91
+	INVALID_EID_TYPE                               = -92
+	CANNOT_CREATE_PCAP_FILE                        = -93
+	INCORRECT_ADJACENCY_TYPE                       = -94
+	EXCEEDED_NUMBER_OF_RANGES_CAPACITY             = -95
+	EXCEEDED_NUMBER_OF_PORTS_CAPACITY              = -96
+	INVALID_ADDRESS_FAMILY                         = -97
+	INVALID_SUB_SW_IF_INDEX                        = -98
+	TABLE_TOO_BIG                                  = -99
+	CANNOT_ENABLE_DISABLE_FEATURE                  = -100
+	BFD_EEXIST                                     = -101
+	BFD_ENOENT                                     = -102
+	BFD_EINUSE                                     = -103
+	BFD_NOTSUPP                                    = -104
+	ADDRESS_IN_USE                                 = -105
+	ADDRESS_NOT_IN_USE                             = -106
+	QUEUE_FULL                                     = -107
+	APP_UNSUPPORTED_CFG                            = -108
+	URI_FIFO_CREATE_FAILED                         = -109
+	LISP_RLOC_LOCAL                                = -110
+	BFD_EAGAIN                                     = -111
+	INVALID_GPE_MODE                               = -112
+	LISP_GPE_ENTRIES_PRESENT                       = -113
+	ADDRESS_FOUND_FOR_INTERFACE                    = -114
+	SESSION_CONNECT                                = -115
+	ENTRY_ALREADY_EXISTS                           = -116
+	SVM_SEGMENT_CREATE_FAIL                        = -117
+	APPLICATION_NOT_ATTACHED                       = -118
+	BD_ALREADY_EXISTS                              = -119
+	BD_IN_USE                                      = -120
+	BD_NOT_MODIFIABLE                              = -121
+	BD_ID_EXCEED_MAX                               = -122
+	SUBIF_DOESNT_EXIST                             = -123
+	L2_MACS_EVENT_CLINET_PRESENT                   = -124
+	INVALID_QUEUE                                  = -125
+	UNSUPPORTED                                    = -126
+	DUPLICATE_IF_ADDRESS                           = -127
+	APP_INVALID_NS                                 = -128
+	APP_WRONG_NS_SECRET                            = -129
+	APP_CONNECT_SCOPE                              = -130
+	APP_ALREADY_ATTACHED                           = -131
+	SESSION_REDIRECT                               = -132
+	ILLEGAL_NAME                                   = -133
+	NO_NAME_SERVERS                                = -134
+	NAME_SERVER_NOT_FOUND                          = -135
+	NAME_RESOLUTION_NOT_ENABLED                    = -136
+	NAME_SERVER_FORMAT_ERROR                       = -137
+	NAME_SERVER_NO_SUCH_NAME                       = -138
+	NAME_SERVER_NO_ADDRESSES                       = -139
+	NAME_SERVER_NEXT_SERVER                        = -140
+	APP_CONNECT_FILTERED                           = -141
+	ACL_IN_USE_INBOUND                             = -142
+	ACL_IN_USE_OUTBOUND                            = -143
+	INIT_FAILED                                    = -144
+	NETLINK_ERROR                                  = -145
+	BIER_BSL_UNSUP                                 = -146
+	INSTANCE_IN_USE                                = -147
+	INVALID_SESSION_ID                             = -148
+	ACL_IN_USE_BY_LOOKUP_CONTEXT                   = -149
+)
+
+var vppApiErrors = map[VPPApiError]string{
+	UNSPECIFIED:                        "Unspecified Error",
+	INVALID_SW_IF_INDEX:                "Invalid sw_if_index",
+	NO_SUCH_FIB:                        "No such FIB / VRF",
+	NO_SUCH_INNER_FIB:                  "No such inner FIB / VRF",
+	NO_SUCH_LABEL:                      "No such label",
+	NO_SUCH_ENTRY:                      "No such entry",
+	INVALID_VALUE:                      "Invalid value",
+	INVALID_VALUE_2:                    "Invalid value #2",
+	UNIMPLEMENTED:                      "Unimplemented",
+	INVALID_SW_IF_INDEX_2:              "Invalid sw_if_index #2",
+	SYSCALL_ERROR_1:                    "System call error #1",
+	SYSCALL_ERROR_2:                    "System call error #2",
+	SYSCALL_ERROR_3:                    "System call error #3",
+	SYSCALL_ERROR_4:                    "System call error #4",
+	SYSCALL_ERROR_5:                    "System call error #5",
+	SYSCALL_ERROR_6:                    "System call error #6",
+	SYSCALL_ERROR_7:                    "System call error #7",
+	SYSCALL_ERROR_8:                    "System call error #8",
+	SYSCALL_ERROR_9:                    "System call error #9",
+	SYSCALL_ERROR_10:                   "System call error #10",
+	FEATURE_DISABLED:                   "Feature disabled by configuration",
+	INVALID_REGISTRATION:               "Invalid registration",
+	NEXT_HOP_NOT_IN_FIB:                "Next hop not in FIB",
+	UNKNOWN_DESTINATION:                "Unknown destination",
+	PREFIX_MATCHES_NEXT_HOP:            "Prefix matches next hop",
+	NEXT_HOP_NOT_FOUND_MP:              "Next hop not found (multipath)",
+	NO_MATCHING_INTERFACE:              "No matching interface for probe",
+	INVALID_VLAN:                       "Invalid VLAN",
+	VLAN_ALREADY_EXISTS:                "VLAN subif already exists",
+	INVALID_SRC_ADDRESS:                "Invalid src address",
+	INVALID_DST_ADDRESS:                "Invalid dst address",
+	ADDRESS_LENGTH_MISMATCH:            "Address length mismatch",
+	ADDRESS_NOT_FOUND_FOR_INTERFACE:    "Address not found for interface",
+	ADDRESS_NOT_LINK_LOCAL:             "Address not link-local",
+	IP6_NOT_ENABLED:                    "ip6 not enabled",
+	IN_PROGRESS:                        "Operation in progress",
+	NO_SUCH_NODE:                       "No such graph node",
+	NO_SUCH_NODE2:                      "No such graph node #2",
+	NO_SUCH_TABLE:                      "No such table",
+	NO_SUCH_TABLE2:                     "No such table #2",
+	NO_SUCH_TABLE3:                     "No such table #3",
+	SUBIF_ALREADY_EXISTS:               "Subinterface already exists",
+	SUBIF_CREATE_FAILED:                "Subinterface creation failed",
+	INVALID_MEMORY_SIZE:                "Invalid memory size requested",
+	INVALID_INTERFACE:                  "Invalid interface",
+	INVALID_VLAN_TAG_COUNT:             "Invalid number of tags for requested operation",
+	INVALID_ARGUMENT:                   "Invalid argument",
+	UNEXPECTED_INTF_STATE:              "Unexpected interface state",
+	TUNNEL_EXIST:                       "Tunnel already exists",
+	INVALID_DECAP_NEXT:                 "Invalid decap-next",
+	RESPONSE_NOT_READY:                 "Response not ready",
+	NOT_CONNECTED:                      "Not connected to the data plane",
+	IF_ALREADY_EXISTS:                  "Interface already exists",
+	BOND_SLAVE_NOT_ALLOWED:             "Operation not allowed on slave of BondEthernet",
+	VALUE_EXIST:                        "Value already exists",
+	SAME_SRC_DST:                       "Source and destination are the same",
+	IP6_MULTICAST_ADDRESS_NOT_PRESENT:  "IP6 multicast address required",
+	SR_POLICY_NAME_NOT_PRESENT:         "Segement routing policy name required",
+	NOT_RUNNING_AS_ROOT:                "Not running as root",
+	ALREADY_CONNECTED:                  "Connection to the data plane already exists",
+	UNSUPPORTED_JNI_VERSION:            "Unsupported JNI version",
+	FAILED_TO_ATTACH_TO_JAVA_THREAD:    "Failed to attach to Java thread",
+	INVALID_WORKER:                     "Invalid worker thread",
+	LISP_DISABLED:                      "LISP is disabled",
+	CLASSIFY_TABLE_NOT_FOUND:           "Classify table not found",
+	INVALID_EID_TYPE:                   "Unsupported LSIP EID type",
+	CANNOT_CREATE_PCAP_FILE:            "Cannot create pcap file",
+	INCORRECT_ADJACENCY_TYPE:           "Invalid adjacency type for this operation",
+	EXCEEDED_NUMBER_OF_RANGES_CAPACITY: "Operation would exceed configured capacity of ranges",
+	EXCEEDED_NUMBER_OF_PORTS_CAPACITY:  "Operation would exceed capacity of number of ports",
+	INVALID_ADDRESS_FAMILY:             "Invalid address family",
+	INVALID_SUB_SW_IF_INDEX:            "Invalid sub-interface sw_if_index",
+	TABLE_TOO_BIG:                      "Table too big",
+	CANNOT_ENABLE_DISABLE_FEATURE:      "Cannot enable/disable feature",
+	BFD_EEXIST:                         "Duplicate BFD object",
+	BFD_ENOENT:                         "No such BFD object",
+	BFD_EINUSE:                         "BFD object in use",
+	BFD_NOTSUPP:                        "BFD feature not supported",
+	ADDRESS_IN_USE:                     "Address in use",
+	ADDRESS_NOT_IN_USE:                 "Address not in use",
+	QUEUE_FULL:                         "Queue full",
+	APP_UNSUPPORTED_CFG:                "Unsupported application config",
+	URI_FIFO_CREATE_FAILED:             "URI FIFO segment create failed",
+	LISP_RLOC_LOCAL:                    "RLOC address is local",
+	BFD_EAGAIN:                         "BFD object cannot be manipulated at this time",
+	INVALID_GPE_MODE:                   "Invalid GPE mode",
+	LISP_GPE_ENTRIES_PRESENT:           "LISP GPE entries are present",
+	ADDRESS_FOUND_FOR_INTERFACE:        "Address found for interface",
+	SESSION_CONNECT:                    "Session failed to connect",
+	ENTRY_ALREADY_EXISTS:               "Entry already exists",
+	SVM_SEGMENT_CREATE_FAIL:            "svm segment create fail",
+	APPLICATION_NOT_ATTACHED:           "application not attached",
+	BD_ALREADY_EXISTS:                  "Bridge domain already exists",
+	BD_IN_USE:                          "Bridge domain has member interfaces",
+	BD_NOT_MODIFIABLE:                  "Bridge domain 0 can't be deleted/modified",
+	BD_ID_EXCEED_MAX:                   "Bridge domain ID exceed 16M limit",
+	SUBIF_DOESNT_EXIST:                 "Subinterface doesn't exist",
+	L2_MACS_EVENT_CLINET_PRESENT:       "Client already exist for L2 MACs events",
+	INVALID_QUEUE:                      "Invalid queue",
+	UNSUPPORTED:                        "Unsupported",
+	DUPLICATE_IF_ADDRESS:               "Address already present on another interface",
+	APP_INVALID_NS:                     "Invalid application namespace",
+	APP_WRONG_NS_SECRET:                "Wrong app namespace secret",
+	APP_CONNECT_SCOPE:                  "Connect scope",
+	APP_ALREADY_ATTACHED:               "App already attached",
+	SESSION_REDIRECT:                   "Redirect failed",
+	ILLEGAL_NAME:                       "Illegal name",
+	NO_NAME_SERVERS:                    "No name servers configured",
+	NAME_SERVER_NOT_FOUND:              "Name server not found",
+	NAME_RESOLUTION_NOT_ENABLED:        "Name resolution not enabled",
+	NAME_SERVER_FORMAT_ERROR:           "Server format error (bug!)",
+	NAME_SERVER_NO_SUCH_NAME:           "No such name",
+	NAME_SERVER_NO_ADDRESSES:           "No addresses available",
+	NAME_SERVER_NEXT_SERVER:            "Retry with new server",
+	APP_CONNECT_FILTERED:               "Connect was filtered",
+	ACL_IN_USE_INBOUND:                 "Inbound ACL in use",
+	ACL_IN_USE_OUTBOUND:                "Outbound ACL in use",
+	INIT_FAILED:                        "Initialization Failed",
+	NETLINK_ERROR:                      "netlink error",
+	BIER_BSL_UNSUP:                     "BIER bit-string-length unsupported",
+	INSTANCE_IN_USE:                    "Instance in use",
+	INVALID_SESSION_ID:                 "session ID out of range",
+	ACL_IN_USE_BY_LOOKUP_CONTEXT:       "ACL in use by a lookup context",
+}