On Fri, 6 Apr 2001, Zhigang Chen wrote:
> Hi, guys
>
> I was wondering if libpcap functions can intercept all the incoming or
> outgoing packets and send them down to NIC or receive up to the upper
> layer? I need to make a program that behaves like a virtual NIC(with certain
> delay and loss rate). Can any other toolkit do this?
>
> Thanks.
>
> Gary Chen
I just added a new pcap hack to my site.
http://www.cs.uni-potsdam.de/homepages/students/linuxer/libs/libpcap-0.6dh.tar.gz
Where you can control which packets do you want to capture on a "router"
(outgoing,incoming or both). This is especially usefull when you just have
one device for forwarding (i.e. arprelay on a switch) and see all packets
doubled.
This is only linux specific code, but I guess other UN*X systems
have similar function in kernel to control this. Might be
a new pcap feature? :)
bye,
Sebastian
---
"Please stop the earth. Let me off."
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