1<body>
2This is the root of the JAIN implementation of SIP. It contains an
3implementation of the Provider, Listener and Stack. Implementation of the
4headers is contained in header and implementation of the parser in the
5parser subdirectory. The SIP Protocol specific abstractions are implemented
6in the stack subdirectory.
7
8<p>
9The RI contains several additional Features that are not required by the JAIN-SIP spec
10 and that can be enabled by RI-specific properties that are specified when the SipStack
11 is created. The purpose of these additional properties is to enable the following:
12
13<ul>
14<li> Message Logging features - permits the application to log messages in
15a format that are suitable for trace viewing using the trace viewer facility.
16<li> TCP starvation attack prevention -  Limit the size and timeout for
17  tcp connections.
18<li> UDP Flooding attack prevention -- limit the size of queues and transaction
19  table size.
20<li> TCP message size limitation -- limit the size of TCP messages to prevent
21TCP flooding attacks.
22<li> Connection caching and reuse for TCP connections -- reduce latency by re-using
23 TCP connections on client and server transactions.
24<li> Address resolution -- resolve addresses that are not direct DNS lookups or IP addresses
25  using a custom address resolver.
26<li> Network Layer -- allows your application code to have direct access to the
27 Sockets that are used by the stack (use this feature with caution!).
28</li>
29</ul>
30
31See the javadoc for gov.nist.javax.sip.SipStackImpl for a detailed explanation of
32these features.
33
34<p>
35The interfaces that are suffixed with Ext in this package will not be altered and will
36be included in the next specification revision. These are provided here for those who
37wish to use these extensions and do not want to wait until the next spec revision
38becomes available.
39
40</body>
41
42</a>
43