Re: ip address and the device

David Schwartz wrote:
Zheng Da wrote:

I want to capture packets from the specified ip address.
Given the ip address, how do I get the device I need to listen on. Is it
possible to get the device by programming?

Your question gives us no idea what you're actually asking.

As just a single example of how ambiguous it is, what is the "I"? Do
you mean an actual human being? Or a program on a computer?

One more: you ask about "the device", but what does that mean? Are we
talking about a single computer that has more than one network
interface?

DS

Sorry, I mean I want to use libpcap to capture packets from the specified ip address. But using pcap_open_live(), I should specify the device name. But I have the ip address, how can I get the device name in my program? I hope my program can find the device itself.

Zheng Da

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