一個自用的二進位制通訊訊息協議
阿新 • • 發佈:2020-12-28
格式
[7f] [命令(1byte)] [子命令(2byte)] [dataLength(2byte,範圍:data + CRC + end)] [data] [crc(2byte)][7e]
編碼
BinaryMessage
Scala
package com.xxx.play.base.controller
import com.xxx.play.base.util.{CRC16, HexadecimalUtil}
/**
* 二進位制訊息
*
* 格式:[7f] [命令(1byte)] [子命令(2byte)] [dataLength(2byte,範圍:data)] [data] [crc(2byte)][7e]
*
* 大小端:網路傳輸通用模式(大端模式)
*
* @author Rubin
* @version v1 2020/12/16 17:24
*/
case class BinaryMessage(command: Int, subcommand: Int, data: Array[Byte]) {
def getLength: Array[Byte] = {
HexadecimalUtil.toByteArray(HexadecimalUtil.get16NumAdd0(data.length + 3, 4))
}
def getCrc: Array[Byte] = {
HexadecimalUtil.toByteArray(HexadecimalUtil.get16NumAdd0(CRC16.crc16( data), 4))
}
def toBinaryArray: Array[Byte] = BinaryMessage.toBinaryArray(this)
}
object BinaryMessage {
val HEAD = 0x7f
val END = 0x7e
val DEFAULT_LENGTH = 9 // HEAD + Command + Subcommand +length + CRC + END
def toBinaryArray(message: BinaryMessage): Array[Byte] = {
val dataLen = message.data.length
val binaryArray = new Array[Byte](DEFAULT_LENGTH + dataLen)
val subcommand = HexadecimalUtil.toByteArray(HexadecimalUtil.get16NumAdd0(message.subcommand, 4))
val length = message.getLength
val crc = message.getCrc
System.arraycopy(message.data, 0, binaryArray, 6, dataLen)
binaryArray(0) = HEAD.toByte
binaryArray(1) = message.command.toByte
binaryArray(2) = subcommand(0)
binaryArray(3) = subcommand(1)
binaryArray(4) = length(0)
binaryArray(5) = length(1)
binaryArray(6 + dataLen) = crc(0)
binaryArray(7 + dataLen) = crc(1)
binaryArray(8 + dataLen) = END.toByte
binaryArray
}
}
CRC16
package com.xxx.play.base.util;
public class CRC16 {
public static int crc16(byte[] bytes) {
int[] table = {
0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241,
0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440,
0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40,
0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841,
0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40,
0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41,
0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641,
0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040,
0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240,
0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441,
0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41,
0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840,
0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41,
0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40,
0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640,
0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041,
0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240,
0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480, 0xA441,
0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41,
0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840,
0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41,
0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40,
0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640,
0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041,
0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280, 0x9241,
0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440,
0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40,
0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841,
0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40,
0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41,
0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641,
0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040,
};
int crc = 0x0000;
for (byte b : bytes) {
crc = (crc >>> 8) ^ table[(crc ^ b) & 0xff];
}
return crc;
}
}
JavaScript
import {dec2hex, hexStr2Bytes} from './hexUtil'
import {crc16_int} from './crc16_ibm'
const HEAD = 0x7f
const END = 0x7e
// HEAD + Command + Subcommand +length + CRC + END
// const DEFAULT_LENGTH = 9
export function BinaryMessage(command, subcommand, data) {
if (typeof data == 'string') {
this.data = hexStr2Bytes(data)
} else {
this.data = data
}
this.command = command
this.subcommand = subcommand
this.toBinaryArray = toBinaryArray(this)
}
function toBinaryArray(message) {
const data = message.data
const dataLen = data.length
const command = message.command
const subcommand = getSubcommandBytes(message.subcommand)
const length = getLength(dataLen)
const crc = crc16(data)
let bytes = []
bytes[0] = HEAD
bytes[1] = command
bytes[2] = subcommand[0]
bytes[3] = subcommand[1]
bytes[4] = length[0]
bytes[5] = length[1]
bytes[6 + dataLen] = crc[0]
bytes[7 + dataLen] = crc[1]
bytes[8 + dataLen] = END
// add data
for (let i = 0; i < dataLen; i++) {
bytes[6 + i] = data[i]
}
return bytes
}
function getSubcommandBytes(subcommand) {
return hexStr2Bytes(dec2hex(subcommand, 4))
}
function getLength(dataLen) {
return hexStr2Bytes(dec2hex(dataLen + 3, 4))
}
function crc16(data) {
return hexStr2Bytes(dec2hex(crc16_int(data), 4))
}
解碼
前端CRC校驗
function crc16_ibm(cData_str) {
const cData = hexStr2Bytes(cData_str);
let crc = CRC16_IBM(cData);
// let crcLen = crc.length;
// crc = crcLen >= 4 ? crc.slice(2, 4) + crc.slice(0, 2) : crcLen === 3 ? crc.slice(1, 3) + '0' + crc.slice(0, 1) : crcLen === 2 ? crc + '00' : '0' + crc + '00';
return crc;
}
function hexStr2Bytes(str) {
let pos = 0;
let len = str.length;
if (len % 2 !== 0) {
return null;
}
len /= 2;
const arrBytes = [];
for (let i = 0; i < len; i++) {
const s = str.substr(pos, 2);
const v = parseInt(s, 16);
arrBytes.push(v);
pos += 2;
}
return arrBytes;
}
function CRC16_IBM(cData) {
let cLen = cData.length;
let CRC16Table = [
0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241,
0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440,
0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40,
0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841,
0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40,
0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41,
0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641,
0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040,
0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240,
0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441,
0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41,
0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840,
0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41,
0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40,
0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640,
0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041,
0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240,
0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480, 0xA441,
0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41,
0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840,
0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41,
0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40,
0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640,
0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041,
0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280, 0x9241,
0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440,
0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40,
0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841,
0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40,
0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41,
0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641,
0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040
];
let result = 0;
let tableNo = 0;
for (let i = 0; i < cLen; i++) {
tableNo = ((result & 0xff) ^ (cData[i] & 0xff));
result = ((result >> 8) & 0xff) ^ CRC16Table[tableNo];
}
return result.toString(16).toUpperCase();
}
module.exports = {crc16_ibm}
Test
def main(args: Array[String]): Unit = {
val message = BinaryMessage(1, 127, "123456789".getBytes())
println(HexadecimalUtil.bytes2HexString(message.toBinaryArray))
}