I want to incorporate into an already written program an option to set which network interface the program accesses. It is basicly a sniffing program. I have 2 interfaces on the system. I want to access the 2nd one but the program defaults to the first one. I cant disable the first interface or change the bindings in anyway so I need the program to be able to be told which interface use. Other programs written in C work fine but I cant seem to find any code in Perl to do this. The operating system is Windows server 2003. This code should be compatable to use with NT or XP systems as well. Thanks.
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Using Net::Pcap library:
$dev=Net::Pcap::lookupdev(
I think it just finds the nic that is the default nic (meaning the first one that is binded in Windows). Some of the other suggestion were to just simply change the binding order in the OS. This however is NOT an option. I need to make this work in the Perl code. Thanks.
Im not to sure about the syntax on that one. I have only started looking at the Net::PCAP stuff. I was just hacking away at the code and got it to work by commenting out the
$dev=Net::Pcap::lookupdev(
$dev = \Device\NPF_{6832692B-FF5C
This however will only work for the particular system that it is hard coded for. Is there a way maybe using your suggestion Net::Pcap::findalldevs and then selecting on the command line the nic you want? I have no idea where to start here so some code would really help. Thanks.
PS - Since Tintin has posted all of the comments so far I will only give the points to him if he replies with some good code.
This is what I get when I use the findalldevs:
Name "main::err" used only once: possible typo at sniff.pl line 89.
Use of inherited AUTOLOAD for non-method Net::Pcap::findalldevs() is deprecated
at sniff.pl line 89.
Can't locate auto/Net/Pcap/findalldevs.
lib E:/Perl/site/lib .) at sniff.pl line 89
Don't really understand why it cant find it since the Net::Pcap libs are installed. It didnt have any trouble with the lookupdev() function. Any ideas? Thanks.
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by: TintinPosted on 2004-03-07 at 13:29:28ID: 10536464
Sorta depends on the method you are using to communicate to the interface. Show us the relevant section of the code you currently have.