Re: gnutls_record_check_pending() issue in GNUTLS 3.0.3 ??

[frank . krout]

I'm integrating secure email support into
an existing mailer app that functions essentially as a mail client.
So, in sending emails, the processing
of SMTP command responses may be delayed while waiting for a particular
server.
The legacy code handles this delay using
the socket select() call to check for input and timeout if nothing is coming
back from a server.

So it is in the client side  that
I am using the gnutls_record_check_pending()

Unless I'm missing something, with gnutls
I need to emulate socket select() with something like:

         
                do { //add
sleep function call here
         
                 
      loop++;
         
                 
      sleep( tv.tv_sec );
         
                 
      count_pending = gnutls_record_check_pending(
session );
         
         }while ( count_pending <= 0 &&
loop < whatever);

hence, my reasoning for the need to
sleep. 
In theory if I can't get gnutls_record_check_pending()
working, then I'd need to do the sleep unconditionally after every command.

gnutls_record_recv() blocks if it has
no data, yes??

Thanks,
Frank

Nikos Mavrogiannopoulos <address@hidden>
Sent by: address@hidden

11/09/2011 06:56 AM

To	address@hidden
cc	GnuTLS mailing list <address@hidden>
Subject	Re: gnutls_record_check_pending() issue in GNUTLS 3.0.3 ??

On Tue, Nov 8, 2011 at 10:16 PM, <address@hidden>
wrote:
This is weird, I reduced my receive
calls to 
peekLen = (long) gnutls_record_recv (esmtpInfo.gnutls.session, esmtpInfo.gnutls.ringBuffer.data,
8); 
Yes, 8 bytes at a time ....  gnutls_record_check_pending()still
does not work. It gets called after every complete line of response is
received. 
Again, runs fine without it. 
I would hate to have to put a mandatory sleep after every smtp command,
prior to looking for a response. 

I don't fully understand your issue. Why do you have to put a sleep? Moreover
I don't know your code, thus I cannot understand why you see that behavior.
Try doing the following:
client: gnutls_record_send(1024 bytes)

server: gnutls_record_recv(4 bytes)
gnutls_record_check_pending() should return 1020.
 
(please keep the mailing list in CC)

regards,
Nikos


Frank Krout
Senior Software Engineer
Office Euro RSCG 4D, 372 Danbury Rd, Wilton, Connecticut 06897
Tel 203.563.3314  Fax 203.563.3434
 Web eurorscg.com

 
     

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