On Sat, 08 May 2010 03:54:26 +1000 Tully Gray <[email protected]> wrote:
>
> I have modified Erik Quanstrom's raw socket ethernet driver
> for 9vx so that it uses the Linux kernel's "tap" device.
Neat!
> < if((fd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL))) < 0)
> ---
> > if((fd = open("/dev/net/tun", O_RDWR)) < 0){
On *BSD tun is for IP frames, tap is for ethernet frames
so there you'd use /dev/tap. You may wish to see how Qemu
handles tap differences & multiple tap interfaces on various
platforms.
On Fri, 07 May 2010 19:14:58 BST "Devon H. O'Dell" <[email protected]> wrot
e:
>
> Yes. The tap(4) interface allows you to clone an existing ethernet
> device on the system, and it's what most virtualization platforms use.
Sorry for nitpicking! "tap" appears as a completely separate
virtual ethernet interface to the host. The "other end" of
tap is a device, to be open()ed by a program. One can bridge
the host side interface to existing physical ethernet
interfaces but you don't have to.
