Part of ticket #780: enhance the PJNATH doxygen documentation

git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@2642 74dad513-b988-da41-8d7b-12977e46ad98
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+/* $Id$ */
+/* 
+ * Copyright (C) 2008-2009 Teluu Inc. (http://www.teluu.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+ */
+
+
+/**
+@addtogroup samples_page
+
+Several samples that are included in the PJSIP distributions. The screenshots
+below were taken on a Windows machine, but the library is very portable and
+it is known to run on platforms such as Linux, MacOS X, Windows Mobile,
+Symbian, and so on.
+
+  - @ref ice_demo_sample\n
+    This sample demonstrates how to use \ref PJNATH_ICE_STREAM_TRANSPORT
+    <b>without</b> using signaling protocol such as <b>SIP</b>. It provides 
+    interactive user interface to create and manage the ICE sessions as well
+    as to exchange SDP with another ice_demo instance.\n\n
+    \image html ice_demo.jpg "ice_demo on WinXP"
+
+  - @ref turn_client_sample\n
+    This sample demonstrates how to use \ref PJNATH_TURN_SOCK
+    and also \ref PJNATH_STUN_SOCK. It provides interactive 
+    user interface to manage allocation, permissions, and
+    channel bindings.\n\n
+    \image html pjturn_client.jpg "pjturn_client on WinXP"
+
+  - TURN server sample\n
+    This is a simple sample TURN server application, which
+    we mainly use for testing (as back then there is no TURN
+    server available).\n
+    The source code for this application are in <tt><b>pjnath/src/pjturn-srv</b></tt>
+    directory.
+
+ */
+
+
+/**
+\page turn_client_sample pjturn-client, a sample TURN client
+
+This is a simple, interactive TURN client application, with the 
+following features:
+ - DNS SRV resolution
+ - TCP connection to TURN server
+ - Optional fingerprint
+
+This file is pjnath/src/pjturn-client/client_main.c.
+
+Screenshot on WinXP: \image html pjturn_client.jpg "pjturn_client on WinXP"
+
+\includelineno client_main.c.
+*/
+
+
+/**
+\page ice_demo_sample ice_demo, an interactive ICE endpoint
+
+This sample demonstrates how to use \ref PJNATH_ICE_STREAM_TRANSPORT
+<b>without</b> using signaling protocol such as SIP. It provides
+interactive user interface to create and manage the ICE sessions as well
+as to exchange SDP with another ice_demo instance.
+
+Features of the demo application:
+ - supports host, STUN, and TURN candidates
+ - disabling of host candidates
+ - DNS SRV resolution for STUN and TURN servers
+ - TCP connection to TURN server
+ - Optional use of fingerprint for TURN
+ - prints and parse SDP containing ICE infos
+ - exchange SDP with copy/paste
+
+This file is pjsip-apps/src/samples/icedemo.c
+
+Screenshot on WinXP: \image html ice_demo.jpg "ice_demo on WinXP"
+
+\includelineno icedemo.c.
+*/
+