pcap packet capture speed

["Terry Bogard" <terrybogard4 () hotmail com>]

I'm using winpcap/libpcap in an MFC multi-threaded project to sniff packets 
on my LAN - so that all the devices on my LAN are detected & profiled -  
it's basically a LAN Device management utility.  I'm using  pcap_open_dev()
pcap_open_live() (with tm_ms=0 - so unlimited , promisc = 1) , 
pcap_lookupnet  and then finally pcap_next() in a loop to sniff packets.  
the callback function is defined to be pcap_oneshot, which is processing 
each packet .  I'm posting because my application is working really slow & 
the lan devices are taking a long time to be detected.  I've even tried 
using pcap_dispatch so that i can test with a variable value for the cnt 
parameter - but that hasn't helped.  I'm looking for a way to improve this 
packet sniffing - by adjustment of parameters somewhere - or by writing my 
own low-level code.  But I need your help with this.  what parameters can i 
adjust in any of the winpcap functions, or the packet driver - that would 
help speed up this packet sniffing?  Or how would I go about doing this? My 
LAN consists of 8 devices running Windows O/S.  Oh I'm using the Windows 
version of libpcap.  Any help would be greatly appreciated.


Thanks.


Saad


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