On Thu, Mar 31, 2016 at 05:20:50PM -0400, David Miller wrote:
> >> I'm trying to reduce system call overhead when reading/writing to/from a
> >> tun device in userspace. [...] What would be the right way to do this?
> >>
> > Personally I think tun could benefit greatly if it were implemented as
> > a socket instead of character interface. One thing that could be much
> > better is sending/receiving of meta data attached to skbuf. For
> > instance GSO data could be in ancillary data in a socket instead of
> > inline with packet data as tun seems to be doing now.
>
> Agreed.
Ok. So how should the userspace API work? Creating an AF_PACKET socket
and then using a tun ioctl to create a tun interface and bind it to the
socket?
int fd = socket(AF_PACKET, ...)
struct ifreq ifr = {...};
ioctl(fd, TUNSETIFF, &ifr);
--
Met vriendelijke groet / with kind regards,
Guus Sliepen <g...@tinc-vpn.org>
