IPC摄像头显示时间错误的问题

项目中使用了大华、汉邦高科、天地伟业、海康威视、景阳等国产品牌的IPC设备，都出现了显示时间错误的问题，并且不同品牌的设备时间都不一样，经分析是时区的问题。

现象：

对IPC设备设置格林威治时间 (GMT)，以及北京时区(GMT+8:00:00)后，大华摄像头时间正常，汉邦的时间比正常时间少8小时；

  
    
      
        admin
        wd/TdI3Vx+CQJv34o3jhSKc90nY=
        LTE4NzgwMDkzNjU=
        2017-11-22T08:00:43Z
      
    
  
  
    
      Manual
      false
      
        GMT+8:00
      
      
        
          8
          0
          43
        
        
          2017
          11
          22
        
      
    
  

HTTP/1.1 200 OK
Server: gSOAP/2.8
Content-Type: application/soap+xml; charset=utf-8; action="http://www.onvif.org/ver10/device/wsdl/SetSystemDateAndTime"
Content-Length: 2269
Connection: close

大华显示2017.11.22 16:00:43，汉邦显示2017.11.22 08:00:43

分别对GMT+8:00:00、GMT-8:00:00、CCT+8:00:00、CCT-8:00:00时区作了测试，结果如下：

时区	汉邦	大华
GMT+8:00:00	-8h	+8h
GMT-8:00:00	+8h	-8h
CCT+8:00:00	-8h	-8h
CCT-8:00:00	+8h	+8h

解决方案：

设置格林威治时间 (GMT)，时区统一为CCT-8:00:00。

int OnvifSetTime(char *deviceAddr, char *user, char *password, int timeOut)
{
    int retval = 0;
    struct SOAP_ENV__Header header;
    struct soap *soap;
    
    if ((soap = Initsoap(&header, NULL, NULL, timeOut)) == NULL)
    {
        DPRINT(ONVIF_ERR, "Initsoap error!\n");    
        return RETURN_FAIL;
    }
    
    DPRINT(ONVIF_INFO, "\n-------------------OnvifSetTime--------------\n\n");

    soap_wsse_add_UsernameTokenDigest_ex(soap, "user", user, password);

    time_t now;   
    struct tm *timenow;      
      
    time(&now);   
    timenow = gmtime(&now);  
    
    DPRINT(ONVIF_INFO, "year:%d month:%d day:%d hour:%d min:%d sec:%d \r\n", timenow->tm_year, timenow->tm_mon, timenow->tm_mday, timenow->tm_hour, timenow->tm_min, timenow->tm_sec);

    struct _tds__SetSystemDateAndTime setReq;
    struct _tds__SetSystemDateAndTimeResponse setResponse;

    soap_default__tds__SetSystemDateAndTime(soap, &setReq);

    setReq.DateTimeType = 0;
    setReq.DaylightSavings = 0;

    char *timez = "CCT-8:00:00";
    struct tt__TimeZone timeZTmp;
    timeZTmp.TZ = timez;
    setReq.TimeZone = &timeZTmp;
    struct tt__DateTime datatimeTmp;
    struct tt__Date dataTmp;
    struct tt__Time timeTmp;
    dataTmp.Year = timenow->tm_year + 1900;
    dataTmp.Month = timenow->tm_mon + 1;
    dataTmp.Day = timenow->tm_mday;

    timeTmp.Hour = timenow->tm_hour;
    timeTmp.Minute = timenow->tm_min;
    timeTmp.Second = timenow->tm_sec;

    datatimeTmp.Date = &dataTmp;
    datatimeTmp.Time = &timeTmp;
    setReq.UTCDateTime = &datatimeTmp;

    soap_call___tds__SetSystemDateAndTime(soap, deviceAddr, NULL, &setReq, &setResponse);

    if (soap->error) {
        DPRINT(ONVIF_ERR, "[%s][%d]--->>> soap error: %d, %s, %s\n", __func__, __LINE__, soap->error, *soap_faultcode(soap), *soap_faultstring(soap));
        retval = RETURN_FAIL;
    }
    else{
        retval = RETURN_SUCCESS;         
    }

    Deletesoap(soap);
    return retval;
}