[bind10-dev] fd_share / send_fd

[Francis Dupont]

> On Thu, Apr 07, 2011 at 10:24:32AM +0000, Francis Dupont wrote:
> > Some questions about fd_share / send_fd:
> >  - it seems there are two versions of them today: src/lib/xfr and
> >   src/lib/util/io. It seems it is a simple code reorg, i.e.,
> >   the code moved from xfr to util/io (BTW this is a good idea)
> 
> Actually, there should be just one.

=> yes, it is the same one, yesterday it was in xfr, today in util/io.

> They should be socket file descriptors

=> fine

> >  - there are other ways to send a file descriptor, for instance
> >   one can open /proc/<other_process_id>/fd/<file_descriptor_number>
> >   on Linux or in general any OS with /proc file system.
> >   I'd like to get a fd_share / send_fd clone using this /proc way
> >   (IMHO it is far closer than PF_UNIX to what Windows support,
> >    and this can remove some dependencies too).
> 
> Hmm, why can't there be two different versions, the same headers,
> but different implementations for windows and the rest, like with
> some #ifdef WINDOWS or something?

=> it is the idea but it needs to be less bound to PF_UNIX first.

> Anyway, windows don't have the /proc anyway, right?

=> but it provides WSADuplicateSocket() which takes the process ID
at its second arguments. So it can be made pretty similar to
a send_fd() using /proc (same interface, etc).

> Why TODO list in haskell? It handles infinite data structures.

=> it is not true: the data structures are not really infinite,
they built in a lazy way... Oops, this has nothing to do with bind10.

Thanks

Francis Dupont <fdupont at isc.org>