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<p dir="auto">first of all i want to thank all people involved in gnutls library
providing this critical piece of software. well done!</p>
<p dir="auto">my question is regarding the possibility to use gnutls over custom
transport network. i went over all examples and i could not find a way
to use gnutls in this way. custom transport means that i have a small
library which provides a layer of abstraction of the i/o system.
therefore i have the possibility to use linux sockets or some other
specific hardware. i saw gnutls provides api for setting push/pull
functions which does the sending/receiving part but unfortunately
for me they expect similar blocking behavior as send/recv from linux.
gnutls_transport_set_pull_function/gnutls_transport_set_push_function is
the api i am referring to. i try to provide as scheme of the issue.</p>
<ol dir="auto">
<li>what gnutls has</li>
</ol>
<p dir="auto">|gnutls| <-> |linux sockets|</p>
<ol start="2" dir="auto">
<li>what gnutls has with cbs</li>
</ol>
<p dir="auto">|gnutls| <-> |callbacks with blocking behavior| <-> |linux sockets|</p>
<ol start="3" dir="auto">
<li>what i have</li>
</ol>
<p dir="auto">| appl | <-INTER-> | ct lib nb | <-> |linux sockets or other|</p>
<ol start="4" dir="auto">
<li>what i try to have</li>
</ol>
<p dir="auto">| appl | <-> |gnutls with cbs| <-INTER-> |ct lib nb| <-> |linux sockets or other|</p>
<p dir="auto">the problem is that callbacks with blocking behavior complicate
unnecessarily my work because 'appl' interacts with 'ct lib nb'
on the interface 'INTER' in an asynchronous manner. is there a way to use
gnutls to drive tls in the described setup?</p>
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