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/*
* ============LICENSE_START=======================================================
* dcaegen2-collectors-veshv
* ================================================================================
* Copyright (C) 2018 NOKIA
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=========================================================
*/
package org.onap.dcae.collectors.veshv.domain
/**
* Wire frame structure is presented bellow. All fields are in network byte order (big-endian).
*
* ```
* ┌─────┬───────────────────────┬───────────────────────┬───────────────────────┐
* │octet│ 0 │ 1 │ 2 │
* ├─────┼──┬──┬──┬──┬──┬──┬──┬──┼──┬──┬──┬──┬──┬──┬──┬──┼──┬──┬──┬──┬──┬──┬──┬──┤
* │ bit │ 0│ │ │ │ │ │ │ │ 8│ │ │ │ │ │ │ │16│ │ │ │ │ │ │ │ ...
* ├─────┼──┴──┴──┴──┴──┴──┴──┴──┼──┴──┴──┴──┴──┴──┴──┴──┼──┴──┴──┴──┴──┴──┴──┴──┤
* │field│ 0xFF │ major version │ minor version │
* └─────┴───────────────────────┴───────────────────────┴───────────────────────┘
* ┌─────┬───────────────────────┬───────────────────────┬───────────────────────┬───────────────────────┐
* │octet│ 3 │ 4 │ 5 │ 6 │
* ├─────┼──┬──┬──┬──┬──┬──┬──┬──┼──┬──┬──┬──┬──┬──┬──┬──┼──┬──┬──┬──┬──┬──┬──┬──┼──┬──┬──┬──┬──┬──┬──┬──┤
* ... │ bit │24│ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ...
* ├─────┼──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┴──┤
* │field│ payload size │
* └─────┴───────────────────────────────────────────────────────────────────────────────────────────────┘
* ┌─────┬───────────────────────
* │octet│ 7 ...
* ├─────┼──┬──┬──┬──┬──┬──┬──┬──
* ... │ bit │56│ │ │ │ │ │ │...
* ├─────┼──┴──┴──┴──┴──┴──┴──┴──
* │field│ protobuf payload
* └─────┴───────────────────────
* ```
*
* @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
* @since May 2018
*/
data class WireFrame(val payload: ByteData,
val majorVersion: Short,
val minorVersion: Short,
val payloadSize: Int) {
constructor(payload: ByteArray) : this(ByteData(payload), 1, 0, payload.size)
fun isValid(): Boolean =
majorVersion == SUPPORTED_MAJOR_VERSION
&& payload.size() == payloadSize
companion object {
const val SUPPORTED_MAJOR_VERSION: Short = 1
const val HEADER_SIZE =
3 * java.lang.Byte.BYTES +
1 * java.lang.Integer.BYTES
const val MARKER_BYTE: Short = 0xFF
}
}
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