Showing the changes to java/pkg/sun/nio/ch/MembershipKeyImpl.java (1 of 18352 files). Show all
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| 1 | +/* | |
| 2 | + * Copyright (c) 2008, 2009, 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.nio.ch; | |
| 27 | + | |
| 28 | +import java.nio.channels.*; | |
| 29 | +import java.net.InetAddress; | |
| 30 | +import java.net.NetworkInterface; | |
| 31 | +import java.io.IOException; | |
| 32 | +import java.util.HashSet; | |
| 33 | + | |
| 34 | +/** | |
| 35 | + * MembershipKey implementation. | |
| 36 | + */ | |
| 37 | + | |
| 38 | +class MembershipKeyImpl | |
| 39 | + extends MembershipKey | |
| 40 | +{ | |
| 41 | + private final MulticastChannel ch; | |
| 42 | + private final InetAddress group; | |
| 43 | + private final NetworkInterface interf; | |
| 44 | + private final InetAddress source; | |
| 45 | + | |
| 46 | + // true when key is valid | |
| 47 | + private volatile boolean valid = true; | |
| 48 | + | |
| 49 | + // lock used when creating or accessing blockedSet | |
| 50 | + private Object stateLock = new Object(); | |
| 51 | + | |
| 52 | + // set of source addresses that are blocked | |
| 53 | + private HashSet<InetAddress> blockedSet; | |
| 54 | + | |
| 55 | + private MembershipKeyImpl(MulticastChannel ch, | |
| 56 | + InetAddress group, | |
| 57 | + NetworkInterface interf, | |
| 58 | + InetAddress source) | |
| 59 | + { | |
| 60 | + this.ch = ch; | |
| 61 | + this.group = group; | |
| 62 | + this.interf = interf; | |
| 63 | + this.source = source; | |
| 64 | + } | |
| 65 | + | |
| 66 | + /** | |
| 67 | + * MembershipKey will additional context for IPv4 membership | |
| 68 | + */ | |
| 69 | + static class Type4 extends MembershipKeyImpl { | |
| 70 | + private final int groupAddress; | |
| 71 | + private final int interfAddress; | |
| 72 | + private final int sourceAddress; | |
| 73 | + | |
| 74 | + Type4(MulticastChannel ch, | |
| 75 | + InetAddress group, | |
| 76 | + NetworkInterface interf, | |
| 77 | + InetAddress source, | |
| 78 | + int groupAddress, | |
| 79 | + int interfAddress, | |
| 80 | + int sourceAddress) | |
| 81 | + { | |
| 82 | + super(ch, group, interf, source); | |
| 83 | + this.groupAddress = groupAddress; | |
| 84 | + this.interfAddress = interfAddress; | |
| 85 | + this.sourceAddress = sourceAddress; | |
| 86 | + } | |
| 87 | + | |
| 88 | + int groupAddress() { | |
| 89 | + return groupAddress; | |
| 90 | + } | |
| 91 | + | |
| 92 | + int interfaceAddress() { | |
| 93 | + return interfAddress; | |
| 94 | + } | |
| 95 | + | |
| 96 | + int source() { | |
| 97 | + return sourceAddress; | |
| 98 | + } | |
| 99 | + } | |
| 100 | + | |
| 101 | + /** | |
| 102 | + * MembershipKey will additional context for IPv6 membership | |
| 103 | + */ | |
| 104 | + static class Type6 extends MembershipKeyImpl { | |
| 105 | + private final byte[] groupAddress; | |
| 106 | + private final int index; | |
| 107 | + private final byte[] sourceAddress; | |
| 108 | + | |
| 109 | + Type6(MulticastChannel ch, | |
| 110 | + InetAddress group, | |
| 111 | + NetworkInterface interf, | |
| 112 | + InetAddress source, | |
| 113 | + byte[] groupAddress, | |
| 114 | + int index, | |
| 115 | + byte[] sourceAddress) | |
| 116 | + { | |
| 117 | + super(ch, group, interf, source); | |
| 118 | + this.groupAddress = groupAddress; | |
| 119 | + this.index = index; | |
| 120 | + this.sourceAddress = sourceAddress; | |
| 121 | + } | |
| 122 | + | |
| 123 | + byte[] groupAddress() { | |
| 124 | + return groupAddress; | |
| 125 | + } | |
| 126 | + | |
| 127 | + int index() { | |
| 128 | + return index; | |
| 129 | + } | |
| 130 | + | |
| 131 | + byte[] source() { | |
| 132 | + return sourceAddress; | |
| 133 | + } | |
| 134 | + } | |
| 135 | + | |
| 136 | + public boolean isValid() { | |
| 137 | + return valid; | |
| 138 | + } | |
| 139 | + | |
| 140 | + // package-private | |
| 141 | + void invalidate() { | |
| 142 | + valid = false; | |
| 143 | + } | |
| 144 | + | |
| 145 | + public void drop() { | |
| 146 | + // delegate to channel | |
| 147 | + ((DatagramChannelImpl)ch).drop(this); | |
| 148 | + } | |
| 149 | + | |
| 150 | + @Override | |
| 151 | + public MulticastChannel channel() { | |
| 152 | + return ch; | |
| 153 | + } | |
| 154 | + | |
| 155 | + @Override | |
| 156 | + public InetAddress group() { | |
| 157 | + return group; | |
| 158 | + } | |
| 159 | + | |
| 160 | + @Override | |
| 161 | + public NetworkInterface networkInterface() { | |
| 162 | + return interf; | |
| 163 | + } | |
| 164 | + | |
| 165 | + @Override | |
| 166 | + public InetAddress sourceAddress() { | |
| 167 | + return source; | |
| 168 | + } | |
| 169 | + | |
| 170 | + @Override | |
| 171 | + public MembershipKey block(InetAddress toBlock) | |
| 172 | + throws IOException | |
| 173 | + { | |
| 174 | + if (source != null) | |
| 175 | + throw new IllegalStateException("key is source-specific"); | |
| 176 | + | |
| 177 | + synchronized (stateLock) { | |
| 178 | + if ((blockedSet != null) && blockedSet.contains(toBlock)) { | |
| 179 | + // already blocked, nothing to do | |
| 180 | + return this; | |
| 181 | + } | |
| 182 | + | |
| 183 | + ((DatagramChannelImpl)ch).block(this, toBlock); | |
| 184 | + | |
| 185 | + // created blocked set if required and add source address | |
| 186 | + if (blockedSet == null) | |
| 187 | + blockedSet = new HashSet<InetAddress>(); | |
| 188 | + blockedSet.add(toBlock); | |
| 189 | + } | |
| 190 | + return this; | |
| 191 | + } | |
| 192 | + | |
| 193 | + @Override | |
| 194 | + public MembershipKey unblock(InetAddress toUnblock) { | |
| 195 | + synchronized (stateLock) { | |
| 196 | + if ((blockedSet == null) || !blockedSet.contains(toUnblock)) | |
| 197 | + throw new IllegalStateException("not blocked"); | |
| 198 | + | |
| 199 | + ((DatagramChannelImpl)ch).unblock(this, toUnblock); | |
| 200 | + | |
| 201 | + blockedSet.remove(toUnblock); | |
| 202 | + } | |
| 203 | + return this; | |
| 204 | + } | |
| 205 | + | |
| 206 | + @Override | |
| 207 | + public String toString() { | |
| 208 | + StringBuilder sb = new StringBuilder(64); | |
| 209 | + sb.append('<'); | |
| 210 | + sb.append(group.getHostAddress()); | |
| 211 | + sb.append(','); | |
| 212 | + sb.append(interf.getName()); | |
| 213 | + if (source != null) { | |
| 214 | + sb.append(','); | |
| 215 | + sb.append(source.getHostAddress()); | |
| 216 | + } | |
| 217 | + sb.append('>'); | |
| 218 | + return sb.toString(); | |
| 219 | + } | |
| 220 | +} | |