/**
 * Copyright 2013-2015 Seagate Technology LLC.
 *
 * This Source Code Form is subject to the terms of the Mozilla
 * Public License, v. 2.0. If a copy of the MPL was not
 * distributed with this file, You can obtain one at
 * https://mozilla.org/MP:/2.0/.
 *
 * This program is distributed in the hope that it will be useful,
 * but is provided AS-IS, WITHOUT ANY WARRANTY; including without
 * the implied warranty of MERCHANTABILITY, NON-INFRINGEMENT or
 * FITNESS FOR A PARTICULAR PURPOSE. See the Mozilla Public
 * License for more details.
 *
 * See www.openkinetic.org for more project information
 */
package com.seagate.kinetic.proto;

option java_outer_classname = "Kinetic";

// this is a local message to allow the program to read
// the protocol version number by building this message
// and then reading the value.
message Local {
	optional string protocolVersion = 1 [default = "3.1.0"];
}

// THe message is an authorization and command bytes.
message Message {

// 1-3 are reserved, do not u

// Every message must be one of the following types.
	optional AuthType authType = 4;

	// Normal messages
	optional HMACauth hmacAuth = 5;

	// for Pin based operations. These include device unlock and
	// device erase
	optional PINauth pinAuth = 6;

	// the embedded message providing the request (for HMACauth) and
	// the response (for all auth types).
	optional bytes commandBytes = 7;

	// The Message Type determines how the the message is to be processed.
	enum AuthType {

	// if the message type is unknown, close the connection
		INVALID_AUTH_TYPE = -1;

		// This is for normal traffic. Check the HMAC of the command and
		// if correct, process the command.
		HMACAUTH = 1;

		// device unlock and ISE command. These must come over the TLS connection.
		// If they do not, close the connection. If it is over
		// the TLS connection, execute the pin operation.
		PINAUTH = 2;

		// In the event that the device is going to close the connection, an
		// unsolicited status will be returned first.
		UNSOLICITEDSTATUS = 3;
	}

	// This is for normal message to the device
	// and for responses. These are allowed once the
	// device is unlocked. The HMAC provides for
	// authenticity, Integrity and to enforce roles.
	message HMACauth {

	// The "identity" identifies the requester and the key and algorithm to
	// be used for hmac.
		optional int64 identity = 1;
		optional bytes hmac = 2;
	}

	// Pin based authentication for Pin operations.
	message PINauth {

	// The pin necessary to make the operations valid
		optional bytes pin = 1;
	}

}

message Command {

//message header
	optional Header header = 1;

	//message body
	optional Body body = 2;

	//operation status
	optional Status status = 3;

	//message header
	message Header {

	// "cluster" is the  number of the cluster definition. If this is incompatible,
	// the request is rejected. If it is missing, it is assumed to be 0. (0 allows systems not
	// using cluster versioning to ignore this field in the header and in the setup.)
		optional int64 clusterVersion = 1;

		// 2 is reserved.

		// A unique number for this connection between the source and target. On the first request
		// to the device, this should be the time of day in seconds since 1970. The device can change this
		// number and the client must continue to use the new number and the number must remain
		// constant during the session. (See security document).
		optional int64 connectionID = 3;

		// the sequence of this request in this TCP connection. As long as this value is getting larger we have
		// strong ordering and replay prevention within a session. This combined with the time and connectionID
		// provides strong ordering between sessions. (See security document).
		optional int64 sequence = 4;

		//co-related sequence
		optional int64 ackSequence = 6;

		//operation code - put/get/delete/GetLog, etc.
		optional MessageType messageType = 7;

		// 8 is reserved, no not use

		// Request timeout (in ms). This is the amount of time that this request should take. If this timeout
		// is triggered, there are three possible results that can be returned.
		//   - SERVICE_BUSY meaning that the request was still on the queue waiting to be executed
		//   - EXPIRED meaning that a long running operation was stopped because the time expired.
		//   - DATA_ERROR meaning that the request was in process, but that the error recovery was not
		//          complete at the time that the time expired
		optional int64 timeout = 9;

		// If true, requests will not attempt multi revolution recoveries even if the timeout has not occurred.
		// In this case the result will be DATA_ERROR. To have the device exhaust all possible error recovery, leave
		// this field off or set to false, and make sure that the timeout is set to be longer than any possible queue
		// time and error recovery time. On a disk device, the maximum error recovery time could be seconds.
		// Once all possible data recovery operations are complete and have not succeeded, PERM_DATA_ERROR will be
		// returned.
		optional bool earlyExit = 10;

		// 11 is reserved

		// Priority is a simple integer that determines the priority of this
		// request. All activity at a higher priority will execute before that
		// of lower priority traffic. A higher number is higher priority.
		optional Priority priority = 12;

		// A hint of how long a job should run before yielding. Specified in
		// miliseconds. A value of 0 indicates that the operation can perform one
		// sub operation and then check to see if there are other sub higher
		// priority operations. An example of a sub-operation might be a single put
		// in a P2P operation, etc.
		optional int64 TimeQuanta = 13;

		// batch id to be included in each command of a batch operation
		// this id is generated by client library and must be unique
		// within the same connection.
		optional uint32 batchID = 14;
	}

	//message body
	message Body {

	//key/value op
		optional KeyValue keyValue = 1;

		//range operation
		optional Range range = 2;

		//set up operation
		optional Setup setup = 3;

		// Peer to Peer operations.
		optional P2POperation p2pOperation = 4;

		// 5 is reserved.

		//GetLog
		optional GetLog getLog = 6;

		//set up security
		optional Security security = 7;

		// Perform Pin-based operations
		optional PinOperation pinOp = 8;

		// batch operation
		// This is included in the END_BATCH and END_BATCH_RESPONSE.
		optional Batch batch = 9;

		// power management
		optional PowerManagement power = 10;
	}

	message PowerManagement {
		optional PowerLevel level = 1;
	}

	// This is included in the END_BATCH and END_BATCH_RESPONSE.
	message Batch {
		// set by the client library in END_BATCH request message.
		// the total number of operations in the batch
		optional int32 count = 1;

		// set by the drive in END_BATCH_RESPONSE message.
		// If a batch is committed successfully, all sequence Ids of those
		// commands (PUT/DELETE) performed in the batch are
		// added in the END_BATCH_RESPONSE message.
		repeated int64 sequence = 2 [packed=true];

		// This field is set by the drive if a batch commit failed.
		// The first failed operation sequence in the batch is set as value.
		optional int64 failedSequence = 3;
	}

	//operation status
	message Status {
	//status code
		optional StatusCode code = 1;
		//status message
		optional string statusMessage = 2;
		//optional information comes with status
		optional bytes detailedMessage = 3;

		//enum of status code
		enum StatusCode {
		// Must come first, so default is invalid
			INVALID_STATUS_CODE = -1;

			//  for a P2P operation, there was a reason the list was incomplete. This is for items
			// that were not attempted.
			NOT_ATTEMPTED = 0;
			SUCCESS = 1;
			HMAC_FAILURE = 2;
			NOT_AUTHORIZED = 3;
			VERSION_FAILURE = 4;
			INTERNAL_ERROR = 5;
			HEADER_REQUIRED = 6;
			NOT_FOUND = 7;
			VERSION_MISMATCH = 8;

			// If there are too many requests in the device at this time, requests
			// will be rejected with this error message. The common response is to
			// wait and retry the operation with an exponential back-off.
			SERVICE_BUSY = 9;

			// A long operation was started and a timeout happened mid operation. This
			// does not imply a failure.
			EXPIRED = 10;

			// A data error happened and either earlyExit was set or the timeout happened.
			DATA_ERROR = 11;

			// A data error happened and all possible error recovery operations have been
			// performed. There is no value to trying this again. If the system has the ability
			// to determine the correct information, writing the data again can get rid
			PERM_DATA_ERROR = 12;

			// A TCP connection to the remote peer failed. This is only for the P2P Operation
			REMOTE_CONNECTION_ERROR = 13;

			// When the device is full, it returns this error. The background scrubbing may free space,
			// so this error may go away
			NO_SPACE = 14;

			// In the set security, an HmacAlgorithm was specified as Unknown or there is a protocol
			// version mis-match
			NO_SUCH_HMAC_ALGORITHM = 15;

			// The request is not valid. Subsequent attempts with the same request will return the same code.
			// Examples: GET does not specify keyValue message, GETKEYRANGE operation does not specify startKey, etc
			INVALID_REQUEST = 16;

			// For P2P Requests, the operation was executed successfully but some nested operations
			// did not succeed. This indicates that callers should review the status of nested operations.
			// This status should only be used in the Command > Status, not in the Status messages
			// of nested P2POperations
			NESTED_OPERATION_ERRORS = 17;

			// If the device is currently locked and can not validate
			// the hmac. This is returned as an status
			// and the connection is terminated.
			DEVICE_LOCKED = 18;

			// The device was already unlocked. The validity of the
			// pin was NOT checked. The connection remains open.
			DEVICE_ALREADY_UNLOCKED = 19;

			// The connection is being terminated. Details as to why are
			// in the message string.
			CONNECTION_TERMINATED = 20;

			// During a batch operation, the only operations allowed are put "
			// and delete. This error is put against the offending command and "
			// the rest of the commands and the END_BATCH return NOT_ATTEMPTED."
			INVALID_BATCH = 21;

			// the status is returned to caller if commands are received when
			// device is in hibernate state
			HIBERNATE = 22;

			// the status is returned to caller if commands are received when
			// device is shutting down.
			SHUTDOWN = 23;
		}

	}

	//key/value entry operation
	message KeyValue {

	// 1 is reserved

	// On a put or delete, this is the next version that the data will be. The version field is opaque to the
	// target. (See Atomic operations document)
		optional bytes newVersion = 2;

		// On a put or delete, this forces the write to ignore the existing version of existing data (if it exists).
		optional bool force = 8;

		//entry key
		optional bytes key = 3;

		//entry version in store
		optional bytes dbVersion = 4;

		// this is the integrity value of the data. This may or may not be in the clear, depending on the algorithm
		// used.
		optional bytes tag = 5;

		// The following is for the protection of the data. If the data is protected with a hash or CRC, then
		// the algorithm will be negative. If the data protection algorithm is not a standard unkeyed algorithm
		// then  a positive number is used and the device has no idea what the key is. See the discussion of
		// encrypted key/value store.(See security document).
		optional Algorithm algorithm = 6;

		// for read operations, this will get all the information about the value except for the
		// value itself. This is valuable for getting the integrity field or the version without also
		// having to get the data. If this field is not present, it is as if it is false. For
		// write or delete operations, if this is set, the command is rejected.
		optional bool metadataOnly = 7;

		// Synchronization allows the puts and deletes to determine if they are to be
		// WRITETHROUGH: This request is made persistent before returning. This does not effect any other pending operations.
		// WRITEBACK: They can be made persistent when the device chooses, or when a subsequent FLUSH is give to the device.
		// FLUSH: All pending information that has not been written is pushed to the disk and the command that
		//    specifies FLUSH is written last and then returned. All WRITEBACK writes that have received ending
		//    status will be guaranteed to be written before the FLUSH operation is returned completed.
		optional Synchronization synchronization = 9;
	}

	enum Synchronization {
		INVALID_SYNCHRONIZATION = -1; // Must come first, so default is invalid
		WRITETHROUGH = 1;
		WRITEBACK = 2;
		FLUSH = 3;
	}

	//key range op
	message Range {
		optional bytes startKey = 1;
		optional bytes endKey = 2;
		optional bool startKeyInclusive = 3;
		optional bool endKeyInclusive = 4;

		// The maximum number of keys returned
		optional int32 maxReturned = 5;

		// The keys are searched for and returned in a reverse order. For instance
		// if the search is startKey="j", endKey="k", maxReturned=2,
		// reverse=true and the keys "k0", "k1", "k2" exist
		// the system will return "k2" and "k1" in that order.
		optional bool reverse = 6;

		// 7 is reserved;

		//get range response .
		repeated bytes keys = 8;
	}

	//set up operation.

	// if any or all of these are fields are included, they are set.
	// These are persistent options that are retained across power fail and
	// erased on either PIN erase or PIN secure erase.
	message Setup {

	// The cluster version to be checked. The default if never set is 0.
	// If this is missing, it is assumed to be unchanged;
	// This is persistent between boots of the device.
		optional int64 newClusterVersion = 1;

		// 2, 3, 4 are reserved.

		// indicates the presence of a firmware load in the data portion of this
		// message. The firmware is itself protected on its own for integrity,
		// authenticity, etc.
		optional bool firmwareDownload = 5;
	}

	// P2P operations allow devices to be able to send keys to other devices.
	// this is either a standalone command or added to a put command.
	message P2POperation {

	// Describe the target machine
		optional Peer peer = 1;
		// List of operations to be performed.
		repeated Operation operation = 2;

		// Indicates whether all operations have Status SUCCESS
		// When false, clients should traverse Operation status codes to discover
		// error cases.
		// When true, no further error checking should be required.
		optional bool allChildOperationsSucceeded = 3;
		message Operation {

		// 1 and 2 are reserved

		// the key of the entry to move
			optional bytes key = 3;
			// the expected version number in the other machine
			// the version number will be the version in the stored entry.
			optional bytes version = 4;
			// to have the moved key have a different final key used.
			optional bytes newKey = 5;
			// force the write ignoring the current key version.
			optional bool force = 6;
			// returned status
			optional Status status = 7;

			// an operation to add to this put operation. THis allows the
			// formation of a pipeline client -> A ->B ->C with the status for all returning
			// back to the client.
			optional P2POperation p2pop = 8;
		}

		message Peer {
			optional string hostname = 1;
			optional int32 port = 2;
			optional bool tls = 3;
		}

	}

	//get log
	message GetLog {
		repeated Type types = 1;
		enum Type {
			INVALID_TYPE = -1; // Must come first, so default is invalid
			UTILIZATIONS = 0;
			TEMPERATURES = 1;
			CAPACITIES = 2;
			CONFIGURATION = 3;
			STATISTICS = 4;
			MESSAGES = 5;
			LIMITS = 6;
			DEVICE = 7;
		}

		repeated Utilization utilizations = 2;
		repeated Temperature temperatures = 3;
		optional Capacity capacity = 4;
		optional Configuration configuration = 5;
		repeated Statistics statistics = 6;
		optional bytes messages = 7;
		optional Limits limits = 8;
		optional Device device = 9;
		message Utilization {

		// The name of the utilization being reported. These names can be standard and proprietary. The
		// standard names are "HDA", "EN0" and "EN1". If there are more items that are
		// being reported, such as processor utilization, can have a descriptive name.
			optional string name = 1;

			// A number between 0.00 and 1.00. The resolution of this number is up to the
			// device. 1 means 100% utilized.
			optional float value = 2;
		}

		message Temperature {

		// The name of the temperature being reported. These names can be standard and proprietary. The
		// standard name is "HDA". If there are more items that are
		// being reported, such as processor temperature, can have a descriptive name.
			optional string name = 1;

			// The current temperature in degrees c
			optional float current = 2;
			optional float minimum = 3;
			optional float maximum = 4;
			optional float target = 5;
		}

		// These capacities are in bytes.
		message Capacity {
		// 1-3 are reserved
			optional uint64 nominalCapacityInBytes = 4;
			optional float portionFull = 5;
		}

		message Configuration {

		// name of the vendor. Should be "Seagate"
			optional string vendor = 5;

			// The model of the device.
			// "Simulator" for the simulator.
			optional string model = 6;

			// Device Serial number (SN)
			optional bytes serialNumber = 7;

			// Device world wide name (WWN)
			optional bytes worldWideName = 14;

			// This is the vendor specific version of the software on the device in dot notation
			// if this is not set or ends with "x" this is test code.
			optional string version = 8;
			optional string compilationDate = 12;
			optional string sourceHash = 13;

			// This is the version of the protocol (.proto file) that the device uses.
			// This is not the highest or lowest version that is supported, just
			// the version that was compiled.
			optional string protocolVersion = 15;
			optional string protocolCompilationDate = 16;
			optional string protocolSourceHash = 17;

			// the interfaces for this device. one per interface.
			repeated Interface interface = 9;

			// these are the port numbers for the software
			optional int32 port = 10;
			optional int32 tlsPort = 11;

			// The unsolicited message at the beginning of a connection will return
			// the drive status. The only two possible values are OPERATIONAL
			// or HIBERNATE.
			optional PowerLevel currentPowerLevel = 18;

			// 18, 19 are reserved.
			message Interface {
				optional string name = 1;
				optional bytes MAC = 2;
				optional bytes ipv4Address = 3;
				optional bytes ipv6Address = 4;
			}

		}

		// These numbers start at 0 when the device starts up and never wraps or resets.
		message Statistics {
			optional MessageType messageType = 1;
			// 2 and 3 are reserved, do not use
			optional uint64 count = 4;
			// This is the sum of the data that is in the data portion. This does not include t
			// the command description. For P2P operations, this is the amount of data moved between
			// devices
			optional uint64 bytes = 5;
		}

		message Limits {
			optional uint32 maxKeySize = 1;
			optional uint32 maxValueSize = 2;
			optional uint32 maxVersionSize = 3;
			optional uint32 maxTagSize = 4;
			optional uint32 maxConnections = 5;
			optional uint32 maxOutstandingReadRequests = 6;
			optional uint32 maxOutstandingWriteRequests = 7;
			optional uint32 maxMessageSize = 8;
			optional uint32 maxKeyRangeCount = 9;
			optional uint32 maxIdentityCount = 10;
			optional uint32 maxPinSize = 11;
			optional uint32 maxOperationCountPerBatch = 12;
			optional uint32 maxBatchCountPerDevice = 13;
		}

		// The Device GetLog message is to ask the device to send back the
		// log of a certain name in the value field. The limit of each
		// log is 1m byte.
		//
		// Proprietary names should be prefaced by the vendor name so that name
		// collisions do not happen in the future. An example could be names that
		// start with “com.WD” would be for Western Digital devices.
		//
		// If the name is not found, the get log returns NOT_FOUND.
		//
		// There can be only one Device in the list of logs that can be retrieved.!
		message Device {
			optional bytes name = 1;
		}

	}

	// These are persistent options that are retained across power fail and
	// erased on either PIN erase or PIN secure erase.
	message Security {
		repeated ACL acl = 2; // one per identity

		// Set the lock and erase pins.
		optional bytes oldLockPIN = 3;
		optional bytes newLockPIN = 4;
		optional bytes oldErasePIN = 5;
		optional bytes newErasePIN = 6;

		//
		message ACL {
			optional int64 identity = 1;
			optional bytes key = 2; // the HMAC key
			optional HMACAlgorithm hmacAlgorithm = 3;

			// value that must be in the key for read, write, range requests. If none are specified
			// then no checking occurs. If one or more is specified, one must match or the request
			// is rejected
			repeated Scope scope = 4;
			enum HMACAlgorithm {
				INVALID_HMAC_ALGORITHM = -1; // Must come first
				// 0 is reserved; do not use
				HmacSHA1 = 1; // this is the default
			}

			message Scope {
				optional int64 offset = 1;
				optional bytes value = 2;
				repeated Permission permission = 3; // one per role
				optional bool TlsRequired = 4; // This is only allowed over the the TLS connection
			}

			enum Permission {
				INVALID_PERMISSION = -1; // place holder for backward .proto file compatibility
				READ = 0; // can read key/values
				WRITE = 1; // can write key/values
				DELETE = 2;
				RANGE = 3; // can do a range
				SETUP = 4; // can set up and a device
				P2POP = 5; // can do a peer to peer operation
				GETLOG = 7; // can get log
				SECURITY = 8; // can set up the security roles of the device
				POWER_MANAGEMENT = 9; // can setup power management
			}

			// The maxPriority is checked against the header priority and range
			// priority (if present) fields. The priority must be greater than
			// or equal to this maxPriority field.
			optional Priority maxPriority = 5;
		}

	}

	// Pin Operations are used for special commands that are valid when the device
	// is locked or to be locked. These are unlock, lock and erase.
	// This must come over the TLS connection to protect the confidentiality and
	// integrity. This operations must be used with PinAuth.
	message PinOperation {
		optional PinOpType pinOpType = 1;
		enum PinOpType {
			INVALID_PINOP = -1;

			// The pin will unlock the device
			UNLOCK_PINOP = 1;

			// This will lock the device. This includes all
			// configuration and user data. This operation is
			// secure from even given physical access and
			// disassembly of the device.
			LOCK_PINOP = 2;

			// Both erase operations will return
			// the device to an as manufactured state removing all
			// user data and configuration settings.

			// Erase the device. This may be secure
			// or not. The implication is that it may be faster
			// than the secure operation.
			ERASE_PINOP = 3;

			// Erase the device in a way that will
			// physical access and disassembly of the device
			// will not
			SECURE_ERASE_PINOP = 4;
		}

	}

	enum Priority {
		NORMAL = 5;
		LOWEST = 1;
		LOWER = 3;
		HIGHER = 7;
		HIGHEST = 9;
	}

	//algorithm
	enum Algorithm {
		INVALID_ALGORITHM = -1; // Must come first, so default is invalid
		SHA1 = 1; // see NIST
		SHA2 = 2; // see NIST
		SHA3 = 3; // see NIST. The length of the tag determined the length of the hash
		CRC32C = 4;
		CRC64 = 5;
		CRC32 = 6;
		// 7-99 are reserved.
		// 100-inf are private algorithms.
	}

	//operation code
	enum MessageType {
		INVALID_MESSAGE_TYPE = -1; // Must come first, so default is invalid
		GET = 2; //get operation
		GET_RESPONSE = 1;
		PUT = 4; //put operation
		PUT_RESPONSE = 3;
		DELETE = 6;
		DELETE_RESPONSE = 5;
		GETNEXT = 8;
		GETNEXT_RESPONSE = 7;
		GETPREVIOUS = 10;
		GETPREVIOUS_RESPONSE = 9;
		GETKEYRANGE = 12;
		GETKEYRANGE_RESPONSE = 11;

		// 13 and 14 are reserved, do not use
		GETVERSION = 16;
		GETVERSION_RESPONSE = 15;

		// 17, 18, 19, and 20 are reserved, do not use
		SETUP = 22;
		SETUP_RESPONSE = 21;
		GETLOG = 24;
		GETLOG_RESPONSE = 23;
		SECURITY = 26;
		SECURITY_RESPONSE = 25;
		PEER2PEERPUSH = 28; //peer to peer push operation
		PEER2PEERPUSH_RESPONSE = 27;
		NOOP = 30;
		NOOP_RESPONSE = 29;
		FLUSHALLDATA = 32;
		FLUSHALLDATA_RESPONSE = 31;

		// 33, 34 are reserved
		PINOP = 36; // Pin based operations
		PINOP_RESPONSE = 35;

		// Media scan is to check that the user data is readable, and
		// if the end to end integrity is known to the device, if the
		// end to end integrity field is correct.
		MEDIASCAN = 38;
		MEDIASCAN_RESPONSE = 37;

		// This performs optimizations of the media. Things like
		// defragmentation, compaction, garbage collection, compression
		// could be things accomplished using the media optimize command.
		MEDIAOPTIMIZE = 40;
		MEDIAOPTIMIZE_RESPONSE = 39;

		// batch operations
		START_BATCH = 42;
		START_BATCH_RESPONSE = 41;
		END_BATCH = 44;
		END_BATCH_RESPONSE = 43;
		ABORT_BATCH = 46;
		ABORT_BATCH_RESPONSE = 45;

		// power management
		SET_POWER_LEVEL = 48;
		SET_POWER_LEVEL_RESPONSE = 47;
	}

	enum PowerLevel {
		INVALID_LEVEL = -1;
		OPERATIONAL = 1; // Fully operational mode, default mode for the drive
		HIBERNATE = 2; // All operations will be rejected
		SHUTDOWN = 3;
		FAIL = 4;
	}

}