[Help-gnutls] Re: handshake with non-blocking sockets?
daniel at haxx.se
Tue Mar 22 10:38:39 CET 2005
On Mon, 21 Mar 2005, Simon Josefsson wrote:
> of any help?
Thanks. This helps me a bit but more for the non-blocking case with send/recv,
which I haven't really gotten to yet. I don't see how this helps me for the
> If I understand correctly, though, GnuTLS perform some internal buffering,
> so calling select might not be reliable. But I don't have much experience
> with non-blocking I/O and GnuTLS. Perhaps Nikos can chime in. I'm not sure
> how portable it is for GnuTLS to push data back into the OS buffers, which
> would be one way to make select() work as expected.
It doesn't sound like the proper way to proceed.
In my simple-minded view, it would be better if there is a function we could
use to ask gnutls if there is more data in its buffers or not (compare with
SSL_pending() in OpenSSL) so that we then can call gnutls again without doing
select() and only if gnutls can't do more we wait for more socket actions.
You may take this question as a request for some clarification in the docs on
how gnutls behaves when using blocking vs non-blocking sockets.
-=- Daniel Stenberg -=- http://daniel.haxx.se -=-
ech`echo xiun|tr nu oc|sed 'sx\([sx]\)\([xoi]\)xo un\2\1 is xg'`ol
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