1 /*
2 * Copyright 2015 The Netty Project
3 *
4 * The Netty Project licenses this file to you under the Apache License,
5 * version 2.0 (the "License"); you may not use this file except in compliance
6 * with the License. You may obtain a copy of the License at:
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations
14 * under the License.
15 */
16
17 package io.netty.handler.ssl;
18
19 /**
20 * Provides a way to get the application-level protocol name from ALPN or NPN.
21 */
22 interface ApplicationProtocolAccessor {
23 /**
24 * Returns the name of the negotiated application-level protocol.
25 *
26 * @return the application-level protocol name or
27 * {@code null} if the negotiation failed or the client does not have ALPN/NPN extension
28 */
29 String getNegotiatedApplicationProtocol();
30 }