Hello,
I've coded an application in C and I use gnutls version 3.4.8 (3.4.8-1
on Fedora 23 x86_64).
My program is just a TLS front end for some of my applications which
don't know how to speak TLS.
I don't use threads but use epoll to manage all active sessions.
I've been trying to diagnose a bug and as such I've added a bunch of
printf all around the code.
I have a function that does the following when epoll says there
something to read:
received = recv(con->fd, buffer, con->peer->rec_size);
if (received > 0) {
wrote = gnutls_record_send(con->peer->session, buffer,
received);
if (wrote == GNUTLS_E_INTERRUPTED || wrote == GNUTLS_E_AGAIN)
return 1;
if (wrote > received)
fprintf(stderr, "BUG at %d: wrote %ld, received: %ld\n",
__LINE__, wrote, received);
} else {
/* do something else here */
}
rec_size is basically <= 16k and <= to what gnutls_record_get_max_size
returned.
Everyonce in a while, the fprintf shows me this:
BUG at 661: wrote 10380, received: 10364
BUG at 661: wrote 16384, received: 15092
BUG at 661: wrote 16384, received: 11376
BUG at 661: wrote 16384, received: 11400
BUG at 661: wrote 16384, received: 11400
BUG at 661: wrote 6892, received: 6780
BUG at 661: wrote 6892, received: 6780
I haven't managed to understand how to trigger it and I'm really curious
why this could happen...
Any idea or pointer would be welcome?
--
Mathieu Chouquet-Stringer [email protected]
The sun itself sees not till heaven clears.
-- William Shakespeare --
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