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+package com.its.api.its.service.vds;
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+
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+import com.its.api.its.model.dto.vds.VdsControlDto;
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+import com.its.api.its.model.entity.vds.TbVdsCtlr;
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+import com.its.api.its.repository.vds.TbVdsCtlrRepository;
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+import com.its.api.utils.SysUtils;
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+import com.its.api.xnettcp.client.service.VdsCommClientService;
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+import io.netty.channel.Channel;
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+import io.netty.channel.ChannelFuture;
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+import lombok.RequiredArgsConstructor;
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+import lombok.extern.slf4j.Slf4j;
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+import org.springframework.stereotype.Service;
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+
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+import java.nio.ByteBuffer;
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+import java.nio.ByteOrder;
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+import java.util.NoSuchElementException;
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+
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+@Slf4j
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+@RequiredArgsConstructor
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+@Service
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+public class VdsControlService {
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+
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+ private final VdsCommClientService vdsCommClientService;
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+ private final TbVdsCtlrRepository repo;
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+
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+ private static final int crc16_arc[] = {
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+ 0x0000, 0xc0c1, 0xc181, 0x0140, 0xc301, 0x03c0, 0x0280, 0xc241,
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+ 0xc601, 0x06c0, 0x0780, 0xc741, 0x0500, 0xc5c1, 0xc481, 0x0440,
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+ 0xcc01, 0x0cc0, 0x0d80, 0xcd41, 0x0f00, 0xcfc1, 0xce81, 0x0e40,
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+ 0x0a00, 0xcac1, 0xcb81, 0x0b40, 0xc901, 0x09c0, 0x0880, 0xc841,
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+ 0xd801, 0x18c0, 0x1980, 0xd941, 0x1b00, 0xdbc1, 0xda81, 0x1a40,
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+ 0x1e00, 0xdec1, 0xdf81, 0x1f40, 0xdd01, 0x1dc0, 0x1c80, 0xdc41,
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+ 0x1400, 0xd4c1, 0xd581, 0x1540, 0xd701, 0x17c0, 0x1680, 0xd641,
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+ 0xd201, 0x12c0, 0x1380, 0xd341, 0x1100, 0xd1c1, 0xd081, 0x1040,
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+ 0xf001, 0x30c0, 0x3180, 0xf141, 0x3300, 0xf3c1, 0xf281, 0x3240,
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+ 0x3600, 0xf6c1, 0xf781, 0x3740, 0xf501, 0x35c0, 0x3480, 0xf441,
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+ 0x3c00, 0xfcc1, 0xfd81, 0x3d40, 0xff01, 0x3fc0, 0x3e80, 0xfe41,
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+ 0xfa01, 0x3ac0, 0x3b80, 0xfb41, 0x3900, 0xf9c1, 0xf881, 0x3840,
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+ 0x2800, 0xe8c1, 0xe981, 0x2940, 0xeb01, 0x2bc0, 0x2a80, 0xea41,
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+ 0xee01, 0x2ec0, 0x2f80, 0xef41, 0x2d00, 0xedc1, 0xec81, 0x2c40,
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+ 0xe401, 0x24c0, 0x2580, 0xe541, 0x2700, 0xe7c1, 0xe681, 0x2640,
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+ 0x2200, 0xe2c1, 0xe381, 0x2340, 0xe101, 0x21c0, 0x2080, 0xe041,
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+ 0xa001, 0x60c0, 0x6180, 0xa141, 0x6300, 0xa3c1, 0xa281, 0x6240,
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+ 0x6600, 0xa6c1, 0xa781, 0x6740, 0xa501, 0x65c0, 0x6480, 0xa441,
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+ 0x6c00, 0xacc1, 0xad81, 0x6d40, 0xaf01, 0x6fc0, 0x6e80, 0xae41,
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+ 0xaa01, 0x6ac0, 0x6b80, 0xab41, 0x6900, 0xa9c1, 0xa881, 0x6840,
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+ 0x7800, 0xb8c1, 0xb981, 0x7940, 0xbb01, 0x7bc0, 0x7a80, 0xba41,
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+ 0xbe01, 0x7ec0, 0x7f80, 0xbf41, 0x7d00, 0xbdc1, 0xbc81, 0x7c40,
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+ 0xb401, 0x74c0, 0x7580, 0xb541, 0x7700, 0xb7c1, 0xb681, 0x7640,
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+ 0x7200, 0xb2c1, 0xb381, 0x7340, 0xb101, 0x71c0, 0x7080, 0xb041,
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+ 0x5000, 0x90c1, 0x9181, 0x5140, 0x9301, 0x53c0, 0x5280, 0x9241,
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+ 0x9601, 0x56c0, 0x5780, 0x9741, 0x5500, 0x95c1, 0x9481, 0x5440,
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+ 0x9c01, 0x5cc0, 0x5d80, 0x9d41, 0x5f00, 0x9fc1, 0x9e81, 0x5e40,
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+ 0x5a00, 0x9ac1, 0x9b81, 0x5b40, 0x9901, 0x59c0, 0x5880, 0x9841,
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+ 0x8801, 0x48c0, 0x4980, 0x8941, 0x4b00, 0x8bc1, 0x8a81, 0x4a40,
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+ 0x4e00, 0x8ec1, 0x8f81, 0x4f40, 0x8d01, 0x4dc0, 0x4c80, 0x8c41,
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+ 0x4400, 0x84c1, 0x8581, 0x4540, 0x8701, 0x47c0, 0x4680, 0x8641,
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+ 0x8201, 0x42c0, 0x4380, 0x8341, 0x4100, 0x81c1, 0x8081, 0x4040
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+ };
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+
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+ /**
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+ * VDS CRC16-ARC(https://crccalc.com/)
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+ * @param data
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+ * @param start
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+ * @param length
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+ * @return
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+ */
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+ public int getCRC16ARC(byte[] data, int start, int length) {
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+ int crc = 0x0000;
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+ for (int ii = start; ii < (start+length); ii++) {
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+ int b = data[ii];
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+ crc = (crc >> 8) ^ crc16_arc[(crc ^ data[ii]) & 0xff];
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+ }
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+ //log.error("{}", Integer.toHexString(crc));
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+ return crc & 0xFFFF;
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+ }
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+
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+
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+ // 데이터 1건 조회, 없으면 exception
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+ private TbVdsCtlr requireOne(String id) {
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+ return this.repo.findOne(id)
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+ .orElseThrow(() -> new NoSuchElementException("데이터가 존재하지 않습니다: " + id));
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+ }
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+
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+ public byte[] getCenterPacket(byte opCode, int length) {
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+
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+ ByteBuffer byteBuffer = ByteBuffer.allocate(10);
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+ byteBuffer.order(ByteOrder.BIG_ENDIAN);
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+ byteBuffer.put((byte)0x24); // 송신시스템-운영단말
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+ byteBuffer.put((byte)0x04); // 수신시스템-VDS 서버
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+ byteBuffer.put((byte)0x01); // 전체프레임개수
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+ byteBuffer.put((byte)0x01); // 현재프레임번호
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+ byteBuffer.put((byte)0x00); // Reserved
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+ byteBuffer.put(opCode); // OP Code
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+ byteBuffer.putInt(length); // 데이터 길이
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+
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+ //log.error("HEAD: {}", SysUtils.byteArrayToHex(byteBuffer.array()));
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+ return byteBuffer.array();
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+ }
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+
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+ /**
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+ * VDS Center Communication protocol buffer create
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+ * @param opCode
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+ * @param address
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+ * @return
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+ */
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+ public ByteBuffer getCommand(byte opCode, Integer group, Integer address, Integer frameNo, Integer cameraNo) {
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+ int length = 0;
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+ if (opCode == 0x0C) {
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+ length = 11;
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+ } else if (opCode == 0x16) {
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+ length = 14;
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+ } else {
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+ log.error("Unknown VDS OPCode: {}", opCode);
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+ return null;
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+ }
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+
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+ // Center packet
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+ byte[] center = getCenterPacket(opCode, length);
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+
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+ // VDS packet
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+ ByteBuffer vdsBuffer = ByteBuffer.allocate(length);
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+ vdsBuffer.order(ByteOrder.BIG_ENDIAN);
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+ vdsBuffer.put((byte)0x10); // DLE
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+ vdsBuffer.put((byte)0x02); // STX
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+ vdsBuffer.putShort((short)group.intValue()); // Address
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+ vdsBuffer.putShort((short)address.intValue()); // Address
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+ vdsBuffer.put(opCode); // OP Code
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+
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+ if (opCode == 0x16) {
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+ // 정지영상 요청
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+ vdsBuffer.putShort((short)frameNo.intValue()); // Frame NO
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+ vdsBuffer.put((byte)cameraNo.intValue()); // Camera No
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+ }
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+ vdsBuffer.put((byte)0x10); // DLE
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+ vdsBuffer.put((byte)0x03); // ETX
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+ int crc = getCRC16ARC(vdsBuffer.array(), 2, length - 6);
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+ byte crc1 = (byte)((crc >> 8) & 0xFF);
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+ byte crc2 = (byte)((crc ) & 0xFF);
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+ vdsBuffer.put(crc1); // CRC1
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+ vdsBuffer.put(crc2); // CRC2
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+ // DLE Stuffing 는 하지 않는 것으로 패킷 분석결과 나타남.
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+
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+ ByteBuffer cmdBuffer = ByteBuffer.allocate(center.length + length);
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+ cmdBuffer.order(ByteOrder.BIG_ENDIAN);
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+ cmdBuffer.put(center);
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+ cmdBuffer.put(vdsBuffer.array());
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+ log.info("VDS Request Buffer: {}", SysUtils.byteArrayToHex(cmdBuffer.array()));
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+ return cmdBuffer;
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+ }
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+
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+ /**
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+ * VDS 제어기 리셋
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+ * @param id
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+ * @return
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+ */
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+ public VdsControlDto.VdsControlRes controlReset(String id, VdsControlDto.VdsControlResetReq req) {
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+ TbVdsCtlr vds = this.requireOne(id);
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+ ByteBuffer cmdBuffer = getCommand((byte)0x0C, 0, Integer.valueOf(id), 0, 0);
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+ return requestVdsCommand(cmdBuffer);
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+ }
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+
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+ /**
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+ * VDS 영상정보 요청
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+ * @param id
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+ * @param req
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+ * @return
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+ */
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+ public VdsControlDto.VdsControlRes requestStopImage(String id, VdsControlDto.VdsControlStopImageReq req) {
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+ TbVdsCtlr vds = this.requireOne(id);
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+ ByteBuffer cmdBuffer = getCommand((byte)0x16, 0, Integer.valueOf(id), req.getFrameNo(), req.getCameraNo());
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+ return requestVdsCommand(cmdBuffer);
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+ }
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+
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+ /**
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+ * VDS 통신서버로 요청 메시지 전송
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+ * @param cmdBuffer
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+ * @return
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+ */
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+ public VdsControlDto.VdsControlRes requestVdsCommand(ByteBuffer cmdBuffer) {
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+ VdsControlDto.VdsControlRes result = new VdsControlDto.VdsControlRes(0, "success");
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+ if (cmdBuffer == null) {
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+ result.setResult(2, "VDS 통신 메시지 생성 중 오류가 발생하였습니다.");
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+ return result;
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+ }
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+ Channel channel = this.vdsCommClientService.getVdsClient().getChannel();
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+ if (channel == null || !channel.isActive()) {
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+ result.setResult(3, "VDS 서버와 통신이 실패하였습니다.");
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+ return result;
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+ }
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+ ChannelFuture f = channel.writeAndFlush(cmdBuffer);
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+ f.awaitUninterruptibly();
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+ if (f.isDone() || f.isSuccess()) {
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+ result.setResult(0, "VDS 서버에 요청 메시지를 정상적으로 전송하였습니다.");
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+ } else {
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+ result.setResult(4, "VDS 서버에 요청 메시지 전송이 실패하였습니다.");
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+ }
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+ return result;
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+ }
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+}
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