Re: [tcpdump-workers] pcap_lookupdev returning NULL
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Hello Guy,
In regards to your latest comments regarding
sudo setcap cap_net_raw,cap_net_admin+eip {your program}
Are you saying that I need to compile my program and then start the compiled
version with these arguments, from a terminal?
Or is there a way that I can pass these arguments within the IDE?
Alternatively, while I've been happy using CentOS as a development environment
up until now. As I'm planning on doing some work with pcap; if there is a
"better" distro for doing pcap development I'm more than happy to build another
development system using whatever flavour is easiest to develop with.
Basically I would like to be able build and execute within the IDE.
Regards,
Vaughan
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[tcpdump-workers] pcap_lookupdev returning NULL
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Hello,
I am a pcap newbie, so this is certain to be a mistake on my part; I'm just
looking for advice on where to look.
When I run the following code:
#include
#include
#include
int main(int argc, char *argv[])
{
char *dev, errbuf[PCAP_ERRBUF_SIZE];
dev = pcap_lookupdev(errbuf);
if (dev == NULL)
{
fprintf(stderr, "Couldn't find
default device: %s\n", errbuf);
return(2);
}
printf("Device: %s\n", dev);
return(0);
}
dev == NULL
dev should be eth0
I'm using CentOS v7
The following packages are installed
* libpcap.x86_64
* libpcap-devel.x86_64
Would appreciate suggestions on what else to check / try?
Regards,
Vaughan
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Re: [tcpdump-workers] pcap_lookupdev returning NULL
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Hello Guy,
Appreciate all the info that you have provided.
Although it probably doesn't look like it from my questions; I did actually
read some tutorials prior to posting my initial question; and none made
reference to the need for:
sudo setcap cap_net_raw,cap_net_admin+eip {your program}
So I'm wondering if you can suggest some reading that I should review to
understand the basics of using libpcap.
Also, where can I find an overview of the key differences between version 1.5.3
and the current release?
Regards,
Vaughan
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