From: Marcelo Ricardo Leitner > Sent: 12 September 2019 23:52 ... > Here it is more visible. If net->...ps_retrans is disabled, remaining > fields (currently just this one, but as we are extending it now, we > have to think about the possibility of more as well) will be ignored, > we and we may not want that. The only real way to add additional fields is to change the name of the structure - that way recompiled programs still work. You could require that programs zero the entire structure - but that is difficult to verify. And, in this case, it seems that the default has to be 0xffff rather than 0 - which is, in itself, horrid. David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)