Re: [Discuss-gnuradio] Physical layer for packet-based communication

[Eric Blossom]

On Fri, Feb 04, 2005 at 08:27:50PM +1030, Berndt Josef Wulf wrote:
> On Fri, 4 Feb 2005 12:48 pm, Eric Blossom wrote:
> > Hi Meenal,
> >
> > As far as I can tell there are a couple of ways we can get there.  The
> > most straight-forward is to use the tap/tun interface to create either
> > a pseudo IP or ethernet port from user space.  The kernel and the rest
> > of the networking stack is on one end, GNU Radio would be on the
> > other.
> >
> > Click isn't a requirement, it's more of an example of how things could
> > be made to work.  [And a source of examples of how to get packets in
> > and out of the kernel from users space.]
> 
> Can this be done in a portable way as to ascertain portability with platforms 
> other than Linux, e.g. by using POSIX compliant API's ?
> 
> Direct kernel hacks will not be easy to port.
> 
> cheerio Berndt

The tap/tun interface works under Linux, Solaris and FreeBSD.
There are no posix API's that do this kind of thing.

http://vtun.sourceforge.net/tun/

Eric