1 /*
   2  * Copyright (c) 2018, 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
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.security.ssl;
  27 
  28 /**
  29  * Enum for SSL/(D)TLS content types.
  30  */
  31 enum ContentType {
  32     INVALID             ((byte)0,   "invalid",
  33                             ProtocolVersion.PROTOCOLS_OF_13),
  34     CHANGE_CIPHER_SPEC  ((byte)20,  "change_cipher_spec",
  35                             ProtocolVersion.PROTOCOLS_TO_12),
  36     ALERT               ((byte)21,  "alert",
  37                             ProtocolVersion.PROTOCOLS_TO_13),
  38     HANDSHAKE           ((byte)22,  "handshake",
  39                             ProtocolVersion.PROTOCOLS_TO_13),
  40     APPLICATION_DATA    ((byte)23,  "application_data",
  41                             ProtocolVersion.PROTOCOLS_TO_13);
  42 
  43     final byte id;
  44     final String name;
  45     final ProtocolVersion[] supportedProtocols;
  46 
  47     private ContentType(byte id, String name,
  48             ProtocolVersion[] supportedProtocols) {
  49         this.id = id;
  50         this.name = name;
  51         this.supportedProtocols = supportedProtocols;
  52     }
  53 
  54     static ContentType valueOf(byte id) {
  55         for (ContentType ct : ContentType.values()) {
  56             if (ct.id == id) {
  57                 return ct;
  58             }
  59         }
  60 
  61         return null;
  62     }
  63 
  64     static String nameOf(byte id) {
  65         for (ContentType ct : ContentType.values()) {
  66             if (ct.id == id) {
  67                 return ct.name;
  68             }
  69         }
  70 
  71         return "<UNKNOWN CONTENT TYPE: " + (id & 0x0FF) + ">";
  72     }
  73 }