1 /* 2 * Copyright (c) 2015, 2016, 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 jdk.incubator.http.internal.frame; 27 28 /** 29 * When sending a frame, the length field must be set in sub-class 30 * by calling computeLength() 31 */ 32 public abstract class Http2Frame { 33 34 public static final int FRAME_HEADER_SIZE = 9; 35 36 protected int streamid; 37 protected int flags; 38 39 public Http2Frame(int streamid, int flags) { 40 this.streamid = streamid; 41 this.flags = flags; 42 } 43 44 public int streamid() { 45 return streamid; 46 } 47 48 public void setFlag(int flag) { 49 flags |= flag; 50 } 51 52 public void setFlags(int flags) { 53 this.flags = flags; 54 } 55 56 public int getFlags() { 57 return flags; 58 } 59 60 public boolean getFlag(int flag) { 61 return (flags & flag) != 0; 62 } 63 64 public void clearFlag(int flag) { 65 flags &= 0xffffffff ^ flag; 66 } 67 68 public void streamid(int streamid) { 69 this.streamid = streamid; 70 } 71 72 73 public String typeAsString() { 74 return asString(type()); 75 } 76 77 public int type() { 78 return -1; // Unknown type 79 } 80 81 int length() { 82 return -1; // Unknown length 83 } 84 85 86 public static String asString(int type) { 87 switch (type) { 88 case DataFrame.TYPE: 89 return "DATA"; 90 case HeadersFrame.TYPE: 91 return "HEADERS"; 92 case ContinuationFrame.TYPE: 93 return "CONTINUATION"; 94 case ResetFrame.TYPE: 95 return "RESET"; 96 case PriorityFrame.TYPE: 97 return "PRIORITY"; 98 case SettingsFrame.TYPE: 99 return "SETTINGS"; 100 case GoAwayFrame.TYPE: 101 return "GOAWAY"; 102 case PingFrame.TYPE: 103 return "PING"; 104 case PushPromiseFrame.TYPE: 105 return "PUSH_PROMISE"; 106 case WindowUpdateFrame.TYPE: 107 return "WINDOW_UPDATE"; 108 default: 109 return "UNKNOWN"; 110 } 111 } 112 113 @Override 114 public String toString() { 115 StringBuilder sb = new StringBuilder(); 116 sb.append(typeAsString()) 117 .append(": length=") 118 .append(Integer.toString(length())) 119 .append(", streamid=") 120 .append(streamid) 121 .append(", flags="); 122 123 int f = flags; 124 int i = 0; 125 if (f == 0) { 126 sb.append("0 "); 127 } else { 128 while (f != 0) { 129 if ((f & 1) == 1) { 130 sb.append(flagAsString(1 << i)) 131 .append(' '); 132 } 133 f = f >> 1; 134 i++; 135 } 136 } 137 return sb.toString(); 138 } 139 140 // Override 141 public String flagAsString(int f) { 142 return "unknown"; 143 } 144 145 }