Initial commit for ticket #950: QoS support:
 - implementation:
     - PJLIB (sock_qos*.*)
 - added QoS support in:
     - SIP UDP transport, 
     - SIP TCP transport,
     - media UDP transport (done in pjsua-lib), 
     - pjnath ICE stream transport,
     - pjnath STUN socket,
     - pjnath TURN client
 - added QoS options in pjsua-lib:
     - QoS fields in pjsua_transport_config
 - added "--set-qos" parameter in pjsua

Notes:
 - QoS in TLS transport is not yet implemented, waiting for #957
 - build ok on VS6, VS2005 (multiple targets), Carbide, and Mingw
 - no run-time testing yet



git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@2966 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjlib/src/pj/sock_qos_dummy.c b/pjlib/src/pj/sock_qos_dummy.c
new file mode 100644
index 0000000..946b26b
--- /dev/null
+++ b/pjlib/src/pj/sock_qos_dummy.c
@@ -0,0 +1,76 @@
+/* $Id$ */
+/* 
+ * Copyright (C) 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 
+ */
+#include <pj/sock_qos.h>
+#include <pj/errno.h>
+#include <pj/log.h>
+
+/* Dummy implementation of QoS API. 
+ * (this is controlled by pjlib's config.h)
+ */
+#if defined(PJ_QOS_IMPLEMENTATION) && PJ_QOS_IMPLEMENTATION==PJ_QOS_DUMMY
+
+#define THIS_FILE   "sock_qos_dummy.c"
+
+
+PJ_DEF(pj_status_t) pj_sock_set_qos_params(pj_sock_t sock,
+					   pj_qos_params *param)
+{
+    PJ_UNUSED_ARG(sock);
+    PJ_UNUSED_ARG(param);
+
+    PJ_LOG(4,(THIS_FILE, "pj_sock_set_qos_params() is not implemented "
+			 "for this platform"));
+    return PJ_ENOTSUP;
+}
+
+PJ_DEF(pj_status_t) pj_sock_set_qos_type(pj_sock_t sock,
+					 pj_qos_type type)
+{
+    PJ_UNUSED_ARG(sock);
+    PJ_UNUSED_ARG(type);
+
+    PJ_LOG(4,(THIS_FILE, "pj_sock_set_qos_type() is not implemented "
+			 "for this platform"));
+    return PJ_ENOTSUP;
+}
+
+
+PJ_DEF(pj_status_t) pj_sock_get_qos_params(pj_sock_t sock,
+					   pj_qos_params *p_param)
+{
+    PJ_UNUSED_ARG(sock);
+    PJ_UNUSED_ARG(p_param);
+
+    PJ_LOG(4,(THIS_FILE, "pj_sock_get_qos_params() is not implemented "
+			 "for this platform"));
+    return PJ_ENOTSUP;
+}
+
+PJ_DEF(pj_status_t) pj_sock_get_qos_type(pj_sock_t sock,
+					 pj_qos_type *p_type)
+{
+    PJ_UNUSED_ARG(sock);
+    PJ_UNUSED_ARG(p_type);
+
+    PJ_LOG(4,(THIS_FILE, "pj_sock_get_qos_type() is not implemented "
+			 "for this platform"));
+    return PJ_ENOTSUP;
+}
+
+#endif	/* PJ_QOS_DUMMY */