Hi -

I'm wondering about the order of your bit fields for Leap Indicator, Version Number and Mode. According to multiple sources I've looked at:

LI: bits 0-1
VN: bits 2-4
Mode: bits 5-7

If you wish these values (as indicated in your comment):
LI: 0
VN: 3
Mode: 3

Then the bit pattern should be 011 011 00, or 0110 1100, or 0x6c, not 0x1b as you use.

Not so?