From: "Jason A. Donenfeld" <Jason@xxxxxxxxx> Date: Thu, 8 Dec 2016 23:20:04 +0100 > Hi David, > > On Thu, Dec 8, 2016 at 1:37 AM, David Miller <davem@xxxxxxxxxxxxx> wrote: >> You really have to land the IP header on a proper 4 byte boundary. >> >> I would suggest pushing 3 dummy garbage bytes of padding at the front >> or the end of your header. > > Are you sure 3 bytes to get 4 byte alignment is really the best? I was > thinking that adding 1 byte to get 2 byte alignment might be better, > since it would then ensure that the subsequent TCP header winds up > being 4 byte aligned. Or is this in fact not the desired trade off, > and so I should stick with the 3 bytes you suggested? If the IP header is 4 byte aligned, the TCP header will be as well.
