Re: [tcpdump-workers] where does PCAP timestamp before or after the

2006-03-30 Thread Fabian Schneider
Hi, We want to know where/when does PCAP put the timestamp (from not so accurate kernel time) on to the packets. I already know, it does when the kernel sees the packet. The question is: Is it after or before the MAC scheduler? I mean, does it in TR or RX buffers or at higher protocol

Re: [tcpdump-workers] where does PCAP timestamp before or after the MAC scheduler?

2006-03-30 Thread David Young
On Thu, Mar 30, 2006 at 12:17:47PM +0200, Debrei Gabor wrote: Hello! We want to compare 802.11 MAC schedulers performance, to decide how much the Media Access takes. Many 802.11 MACs put a microsecond timestamp on received frames. Some wireless drivers in *BSD will load that timestamp