1/*
2 * Copyright (c) 2009, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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24 */
25
26/**
27 * A Java API for Stream Control Transport Protocol.
28 *
29 * <P> The Stream Control Transport Protocol (SCTP) is a reliable,
30 * message-oriented, transport protocol existing at an equivalent level with UDP
31 * (User Datagram Protocol) and TCP (Transmission Control Protocol). SCTP is
32 * session oriented and an association between the endpoints must be established
33 * before any data can be transmitted.
34 *
35 * <P> SCTP has direct support for multi-homing, meaning than an endpoint may be
36 * represented by more than one address and each address may be used for sending
37 * and receiving data, thus providing network redundancy. The connection between
38 * two endpoints is referred to as an association between those endpoints.
39 * Endpoints can exchange a list of addresses during association setup. One
40 * address is designated as the primary address, this is the default address that
41 * the peer will use for sending data. A single port number is used across the
42 * entire address list at an endpoint for a specific session.
43 *
44 * <P> SCTP is message based. I/O operations operate upon messages and message
45 * boundaries are preserved. Each association may support multiple independent
46 * logical streams. Each stream represents a sequence of messages within a single
47 * association and streams are independent of one another, meaning that stream
48 * identifiers and sequence numbers are included in the data packet to allow
49 * sequencing of messages on a per-stream basis.
50 *
51 * <P> This package provides two programming model styles. The one-to-one style
52 * supported by {@link com.sun.nio.sctp.SctpChannel} and {@link
53 * com.sun.nio.sctp.SctpServerChannel}, and the one-to-many
54 * style supported by {@link com.sun.nio.sctp.SctpMultiChannel}.
55 * The semantics of the one-to-one style interface are very similar to TCP.
56 * An {@code SctpChannel} can only control one SCTP association. The
57 * semantics of the one-to-many style interface are very similar to UDP. An
58 * {@code SctpMutliChannel} can control multiple SCTP associations.
59 *
60 * <P> Applications can send and receive per-message ancillary information through
61 * {@link com.sun.nio.sctp.MessageInfo}. For example, the stream number that
62 * the message it is to be sent or received from. The SCTP stack is event driven
63 * and applications can receive notifications of certain SCTP events by invoking
64 * the {@code receive} method of the SCTP channel with an appropriate {@link
65 * com.sun.nio.sctp.NotificationHandler notification handler}.
66 *
67 * <P> The SCTP protocol is defined by
68 * <A HREF="http://tools.ietf.org/html/rfc4960">RFC4960</A>, and the optional
69 * extension for <I>Dynamic Address Reconfiguration</I> is defined by
70 * <A HREF="http://tools.ietf.org/html/rfc5061">RFC5061</A>.
71 *
72 * @since 1.7
73 */
74
75package com.sun.nio.sctp;
76