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 timest

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 > pro

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

2006-03-30 Thread Bruce M Simpson
On Thu, Mar 30, 2006 at 12:17:47PM +0200, Debrei Gabor wrote: > We want to compare 802.11 MAC schedulers performance, to decide > how much the Media Access takes. > > We want to know where/when does PCAP put the timestamp (from not > so accurate kernel time) on to the packets. I already know, i

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

2006-03-30 Thread Debrei Gabor
Hello! We want to compare 802.11 MAC schedulers performance, to decide how much the Media Access takes. 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