freeswitch/libs/sofia-sip
Michael Jerris 20c2740c64 set minimum initital sip t1 timer to 1000ms to work around race condition on retry timer firing before all the things that are supposed to be handled by the timer are set. The base resolution on this timer is 500ms, so doubling up makes sure we always hit the initial retry timer on the next run, where everything should be set. The side effect was, 1/2 the time on a request that did not get immediate response, the timer would be fired and cleared, but the action (sending retry) was never done, and a new timer was not set, causing the request to just sit zombied and never retry. A better solution would be to find and correct the race condition so the timer is never set to early and we never hit this condition. 2010-11-03 13:58:12 -04:00
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README

=============================================================
README / Sofia-SIP - RFC3261 compliant SIP User-Agent library
=============================================================

Introduction
------------

Sofia-SIP is an open-source SIP User-Agent library, compliant
with the IETF RFC3261 specification. It can be used as
a building block for SIP client software for uses such as VoIP,
IM, and many other real-time and person-to-person communication
services. The primary target platform for Sofia-SIP is
GNU/Linux. Sofia-SIP is based on a SIP stack developed at
the Nokia Research Center. Sofia-SIP is licensed under the LGPL.


Quick start
-----------

Sofia-SIP uses the GNU autotools, so building procedure
is the usual:

sh> sh autogen.sh (if building from darcs)
sh> ./configure
sh> make
sh> make install

See also 'docs/devel_platform_notes.txt' for notes on compiling
Sofia-SIP in different environments.

See the "options-client-example" (available using darcs at
http://sofia-sip.org/repos/options-client-example/ or with CVS as
a module in Sofia-SIP CVS tree) for an example of a small app that
is utilizing Sofia-SIP, and specifically the libsofia-sip-ua
library component.

There are also multiple example clients under
the "sofia-sip/utils" directory:

- sip-options, query using SIP OPTIONS method
- sip-date, SIP date printer/parser

The Sofia-SIP su submodule also provides some small utilities:

- addrinfo (libsofia-sip-ua/su), resolve host names
- localinfo (libsofia-sip-ua/su), prints information about
  local network interfaces

References
----------

Project website:
- http://sofia-sip.sourceforge.net
- http://www.sourceforge.net/projects/sofia-sip

Mailing list:
- http://sourceforge.net/mail/?group_id=143636

Version control repositories:
- see the project website (link above)

Licensing
---------

Sofia-SIP is licensed under terms of the GNU LGPL.
See the file "COPYING" for more information.