Add open_live_handle function. Fix issue https://github.com/CoreSecur…

[ardikars]

…ity/pcapy/issues/23

[dajose]

I was looking for support on pcapy for pcap_setdirection and I could find it only here.

Is there a way to set direction without this PR? @ardikars
what's the state of this PR?

[ardikars]

I think pcapy doesn’t support pcap_setdirection() yet.

As libpcap documentation, pcap_setdirection isn't necessarily fully supported on all platforms. I think this function doesn't supported in Windows platform, so need to change the code on this PR like below:

#ifndef WIN32
    if (direction == 0) {
        pcap_setdirection(pt, PCAP_D_INOUT);
    } else if (direction == 1) {
        pcap_setdirection(pt, PCAP_D_IN);
    } else {
        pcap_setdirection(pt, PCAP_D_OUT);
    }
#endif

[dajose]

@ardikars I am trying to get #60 with only the setdirection feature... do you know who can I poke to get a review?

[ardikars]

@dajose no idea.