public static int ParseIntFromBytes(byte[] data, int startIndex, int length, int defaultVal)
{
try
{
// 字节数大于4,从起始索引开始向后处理4个字节,其余超出部分丢弃
int len = length > 4 ? 4 : length;
byte[] tmp = new byte[len];
Buffer.BlockCopy(data, startIndex, tmp, 0, len);
return(ExplainUtils.byteToInteger(tmp));
}
catch (Exception)
{
return(defaultVal);
}
}
//组装平台通用应答消息
public static byte[] rtnServerCommonRespMsg(int msgBodyProps, string phone, int flowId, int msgId)
{
//7E
//8001 消息ID
//0005 消息体属性
//018512345678 手机号
//0015 消息流水号
//0015 应答流水号
//04 结果(00成功, 01失败, 02消息有误, 03不支持,04报警处理确认)
//BA 鉴权码
//7E
MemoryStream ms = new MemoryStream();
List <byte> byteSource = new List <byte>();
// 1. 0x7e
//ms.Write(ExplainUtils.integerTo1Bytes(pkg_delimiter), 0, 1);
byte[] bt1 = ExplainUtils.integerTo1Bytes(pkg_delimiter);
// 2. 消息ID word(16)
//ms.Write(ExplainUtils.integerTo2Bytes(cmd_terminal_register_resp), 0, 2);
byte[] bt2 = ExplainUtils.integerTo2Bytes(cmd_terminal_register_resp);
// 3.消息体属性
byte[] bt3 = ExplainUtils.integerTo2Bytes(msgBodyProps);
// 4. 终端手机号 bcd[6]
//ms.Write(ExplainUtils.string2Bcd(phone), 0, 6);
byte[] bt4 = ExplainUtils.string2Bcd(phone);
// 5. 消息流水号 word(16),按发送顺序从 0 开始循环累加
//ms.Write(ExplainUtils.integerTo2Bytes(flowId), 0, 2);
byte[] bt5 = ExplainUtils.integerTo2Bytes(flowId);
// 6. 应答流水号
//ms.Write(ExplainUtils.integerTo2Bytes(flowId), 0, 2);
byte[] bt6 = ExplainUtils.integerTo2Bytes(flowId);
// 7. 成功
//ms.Write(ExplainUtils.integerTo1Bytes(0), 0, 1);
byte[] bt7 = ExplainUtils.integerTo1Bytes(0);
// 8. 对应终端消息ID
byte[] bt8 = ExplainUtils.integerTo2Bytes(msgId);
byteSource.AddRange(bt1);
byteSource.AddRange(bt2);
byteSource.AddRange(bt3);
byteSource.AddRange(bt4);
byteSource.AddRange(bt5);
byteSource.AddRange(bt6);
byteSource.AddRange(bt7);
byteSource.AddRange(bt8);
// 9. BA 校验码
// 校验码
int checkSum = ExplainUtils.getCheckSum4JT808(byteSource.ToArray(), 1, (int)(byteSource.Count));
//ms.Write(ExplainUtils.integerTo1Bytes(checkSum), 0, 1);
byte[] bt9 = ExplainUtils.integerTo1Bytes(checkSum);
// 11. 0x7e
//ms.Write(ExplainUtils.integerTo1Bytes(pkg_delimiter), 0, 1);
byteSource.AddRange(bt9);
byteSource.AddRange(bt1);
// 转义
return(ExplainUtils.DoEscape4Send(byteSource.ToArray(), 1, byteSource.ToArray().Length - 1));
}
//组装终端应答消息
public static byte[] rtnTerminalRespMsg(int msgBodyProps, string phone, int flowId)
{
//7E
//8100 消息ID
//0004 消息体属性
//018512345678 手机号
//0015 消息流水号
//0015 应答流水号
//04 结果(00成功, 01车辆已被注册, 02数据库中无该车辆, 03终端已被注册, 04数据库中无该终端) 无车辆与无终端有什么区别 ?
//313C 鉴权码
//7E
MemoryStream ms = new MemoryStream();
List <byte> byteSource = new List <byte>();
// 1. 0x7e
//ms.Write(ExplainUtils.integerTo1Bytes(pkg_delimiter), 0, 1);
byte[] bt1 = ExplainUtils.integerTo1Bytes(pkg_delimiter);
// 2. 消息ID word(16)
//ms.Write(ExplainUtils.integerTo2Bytes(cmd_terminal_register_resp), 0, 2);
byte[] bt2 = ExplainUtils.integerTo2Bytes(cmd_common_resp);
// 3. 终端手机号 bcd[6]
//ms.Write(ExplainUtils.string2Bcd(phone), 0, 6);
byte[] bt3 = ExplainUtils.string2Bcd(phone);
// 4. 消息流水号 word(16),按发送顺序从 0 开始循环累加
//ms.Write(ExplainUtils.integerTo2Bytes(flowId), 0, 2);
byte[] bt4 = ExplainUtils.integerTo2Bytes(flowId);
// 5. 应答流水号
//ms.Write(ExplainUtils.integerTo2Bytes(flowId), 0, 2);
byte[] bt5 = ExplainUtils.integerTo2Bytes(flowId);
// 6. 成功
//ms.Write(ExplainUtils.integerTo1Bytes(0), 0, 1);
byte[] bt6 = ExplainUtils.integerTo1Bytes(0);
// 7. 鉴权码
//ms.Write(System.Text.Encoding.GetEncoding(string_encoding).GetBytes(replyToken), 0, replyToken.Length);
byte[] bt7 = System.Text.Encoding.GetEncoding(string_encoding).GetBytes(replyToken);
//8.消息体属性
byte[] bt8 = ExplainUtils.integerTo2Bytes(bt7.Length + 1 + 2);
byteSource.AddRange(bt1);
byteSource.AddRange(bt2);
byteSource.AddRange(bt8);
byteSource.AddRange(bt3);
byteSource.AddRange(bt4);
byteSource.AddRange(bt5);
byteSource.AddRange(bt6);
byteSource.AddRange(bt7);
// 9. BA 校验码
// 校验码
int checkSum = ExplainUtils.getCheckSum4JT808(byteSource.ToArray(), 1, (int)(byteSource.Count));
//ms.Write(ExplainUtils.integerTo1Bytes(checkSum), 0, 1);
byte[] bt9 = ExplainUtils.integerTo1Bytes(checkSum);
// 11. 0x7e
//ms.Write(ExplainUtils.integerTo1Bytes(pkg_delimiter), 0, 1);
byteSource.AddRange(bt9);
byteSource.AddRange(bt1);
// 转义
return(ExplainUtils.DoEscape4Send(byteSource.ToArray(), 1, byteSource.ToArray().Length - 1));
}
