gistfile1.txt

//sender

    NSData *data2 = [self createRandomNSData:8192];
    NSMutableData *dataToSend =[NSMutableData data];
    [dataToSend appendBytes:&tag length:sizeof(int)];
    float currentTimeStamp = CACurrentMediaTime();
    [dataToSend appendBytes:&currentTimeStamp length:sizeof(float)];
    [dataToSend appendData:data2];
      NSLog(@"%i || %f || %lu",tag, currentTimeStamp,(unsigned long)[dataToSend length]);
    [_udpSocket sendData:dataToSend toHost:@"230.0.0.1" port:_port withTimeout:-1 tag:tag];
    tag++;
    
//reciver

    char* dataBytes = [data bytes];
    int inTag;
    float inCurrentTimeStamp;
    [data getBytes:&inTag length:sizeof(int)];
    [data getBytes:&inCurrentTimeStamp range:NSMakeRange(sizeof(int), sizeof(float))];
    float currentTimeStamp = CACurrentMediaTime();
    float timeStampDiff = currentTimeStamp - inCurrentTimeStamp;
    NSLog(@"%i || %f || %lu",inTag, timeStampDiff,(unsigned long)[data length]);