Hello again,
I'd be interested to hear comments about 'nua' (the main high-level API
to libsofia-sip-ua), and possible ideas for improvement.
The intention is to release a stable release of Sofia-SIP in a few months,
and now we'd still have some time to fine-tune the API before it.
Here's a couple of current concerns:
Authentication
--------------
Currently the application needs to parse the SIP authentication scheme
and realm (think of how WWW authentication works in browsers) from the SIP
header structs. One open item is whether NUA should help the application
more in this task.
But, but, the Sofia gaim plugin code (ssip.c) actually has pretty good
example of how to perform this, so this might actually be pretty ok as it
is now. Of course, more documentation never hurts. The nua_foobar() API
functions are already well documented [1], but some of the callbacs are
less so [2].
[1] http://sofia-sip.sourceforge.net/refdocs/nua/
http://sofia-sip.sourceforge.net/refdocs/nua/nua_8c.html
[2] http://sofia-sip.sourceforge.net/refdocs/nua/nua_8h.html#a154a50
But, but, any positive/negative experiences from using these interfaces?
Effects of threading
--------------------
By default, Sofia creates a separate thread for the signaling stack. This
is useful for single-threaded application that might block the main
thread's event loop for relatively long periods of time (file i/o, GUI
operations, etc).
On the other hand, for apps that do not block the event loop (at least not
long enough to harm SIP stack operation), do not require this.
Applications can already enable/disable stack threading with the
su_root_threading() call. But, but, which mode should be the default?
Anyways, there are some known corner cases where threading can cause
trouble (related to structs visible to both applications and the signaling
stack).
--
under work: Sofia-SIP at http://sofia-sip.sf.net
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