Re: [clearview-discuss] libdlpi with libpcap

[sagun shakya <Sagun.Shakya () Sun COM>]

Hi,
> > > I would like to hear from you for suggestions on how libpcap can be
> > > updated to libdlpi. I have a couple of possible approaches to make 
> > > this addition but they may not necessarily be the best approach:
> > >
> > > 1) Introduce a new pcap-libdlpi-solaris.c file which will handle all the
> > > versions of Solaris with libdlpi. The existing pcap-dlpi.c will continue
> > > working for pre-libdlpi versions of Solaris.
> > >
> > > 2) Continue with the use of ifdef #HAVE_SOLARIS approach in the existing
> > > pcap-dlpi.c file to call libdlpi functions for releases that support
> > > libdlpi.
> > >
> > > 3) Instead of using libdlpi, add support to open different 
> > > directories, i.e /dev/net, /dev/ipnet, and add other Solaris-specific 
> > > ioctls to the existing pcap-dlpi.c file under #ifdef protection.

I have developed a prototype with the option 1 proposed. I would like to
hear from you if you have any comments or feedback.
The changes made to the libpcap library can be seen at the link below:

http://cr.opensolaris.org/~sagun/libpcap/

I will be adding a readme file with these changes when providing the
patch later. I've compiled and ran this version of libpcap with tcpdump
and wireshark on a system with and without clearview-UV.

As mentioned before once the UV component of Project Clearview
(http://opensolaris.org/os/project/clearview/uv/) integrates into
Solaris, libpcap will allow you to capture packets at non IP-layers as
well. The present libpcap library enumerates available network devices
on Solaris with find_alldevs() using SIOCCLGIFCONF  flag. Therefore,
only network devices which have been plumbed by IP are listed.  In this
version of libpcap, find_alldevs() calls pcap_platform_finddevs() to
find the rest unplumbed network devices. Since pcap_platform_finddevs()
is implemented using of dlpi_walk(), which will be provided with libdlpi
when UV integrates, the  latest version of SXDE/SXCE will not be able to
support this feature.

Thank you for reviewing,

Sagun




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