1 /* |
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2 * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 package sun.nio.ch; |
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26 |
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27 import java.net.InetAddress; |
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28 import java.net.SocketAddress; |
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29 import java.net.SocketException; |
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30 import java.net.InetSocketAddress; |
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31 import java.io.FileDescriptor; |
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32 import java.io.IOException; |
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33 import java.util.Collections; |
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34 import java.util.Set; |
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35 import java.util.HashSet; |
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36 import java.nio.ByteBuffer; |
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37 import java.nio.channels.SelectionKey; |
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38 import java.nio.channels.ClosedChannelException; |
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39 import java.nio.channels.ConnectionPendingException; |
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40 import java.nio.channels.NoConnectionPendingException; |
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41 import java.nio.channels.AlreadyConnectedException; |
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42 import java.nio.channels.NotYetBoundException; |
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43 import java.nio.channels.NotYetConnectedException; |
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44 import java.nio.channels.spi.SelectorProvider; |
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45 import com.sun.nio.sctp.AbstractNotificationHandler; |
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46 import com.sun.nio.sctp.Association; |
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47 import com.sun.nio.sctp.AssociationChangeNotification; |
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48 import com.sun.nio.sctp.HandlerResult; |
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49 import com.sun.nio.sctp.IllegalReceiveException; |
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50 import com.sun.nio.sctp.InvalidStreamException; |
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51 import com.sun.nio.sctp.IllegalUnbindException; |
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52 import com.sun.nio.sctp.MessageInfo; |
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53 import com.sun.nio.sctp.NotificationHandler; |
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54 import com.sun.nio.sctp.SctpChannel; |
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55 import com.sun.nio.sctp.SctpSocketOption; |
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56 import static com.sun.nio.sctp.SctpStandardSocketOptions.*; |
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57 import static sun.nio.ch.SctpResultContainer.SEND_FAILED; |
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58 import static sun.nio.ch.SctpResultContainer.ASSOCIATION_CHANGED; |
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59 import static sun.nio.ch.SctpResultContainer.PEER_ADDRESS_CHANGED; |
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60 import static sun.nio.ch.SctpResultContainer.SHUTDOWN; |
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61 |
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62 /** |
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63 * An implementation of an SctpChannel |
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64 */ |
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65 public class SctpChannelImpl extends SctpChannel |
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66 implements SelChImpl |
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67 { |
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68 private final FileDescriptor fd; |
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69 |
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70 private final int fdVal; |
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71 |
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72 /* IDs of native threads doing send and receivess, for signalling */ |
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73 private volatile long receiverThread = 0; |
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74 private volatile long senderThread = 0; |
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75 |
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76 /* Lock held by current receiving or connecting thread */ |
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77 private final Object receiveLock = new Object(); |
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78 |
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79 /* Lock held by current sending or connecting thread */ |
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80 private final Object sendLock = new Object(); |
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81 |
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82 private final ThreadLocal<Boolean> receiveInvoked = |
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83 new ThreadLocal<Boolean>() { |
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84 @Override protected Boolean initialValue() { |
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85 return Boolean.FALSE; |
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86 } |
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87 }; |
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88 |
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89 /* Lock held by any thread that modifies the state fields declared below |
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90 DO NOT invoke a blocking I/O operation while holding this lock! */ |
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91 private final Object stateLock = new Object(); |
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92 |
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93 private enum ChannelState { |
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94 UNINITIALIZED, |
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95 UNCONNECTED, |
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96 PENDING, |
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97 CONNECTED, |
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98 KILLPENDING, |
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99 KILLED, |
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100 } |
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101 /* -- The following fields are protected by stateLock -- */ |
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102 private ChannelState state = ChannelState.UNINITIALIZED; |
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103 |
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104 /* Binding; Once bound the port will remain constant. */ |
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105 int port = -1; |
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106 private HashSet<InetSocketAddress> localAddresses = new HashSet<InetSocketAddress>(); |
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107 /* Has the channel been bound to the wildcard address */ |
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108 private boolean wildcard; /* false */ |
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109 //private InetSocketAddress remoteAddress = null; |
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110 |
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111 /* Input/Output open */ |
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112 private boolean readyToConnect; |
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113 |
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114 /* Shutdown */ |
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115 private boolean isShutdown; |
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116 |
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117 private Association association; |
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118 |
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119 private Set<SocketAddress> remoteAddresses = Collections.emptySet(); |
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120 |
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121 /* -- End of fields protected by stateLock -- */ |
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122 |
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123 /** |
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124 * Constructor for normal connecting sockets |
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125 */ |
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126 public SctpChannelImpl(SelectorProvider provider) throws IOException { |
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127 //TODO: update provider remove public modifier |
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128 super(provider); |
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129 this.fd = SctpNet.socket(true); |
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130 this.fdVal = IOUtil.fdVal(fd); |
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131 this.state = ChannelState.UNCONNECTED; |
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132 } |
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133 |
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134 /** |
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135 * Constructor for sockets obtained from server sockets |
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136 */ |
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137 public SctpChannelImpl(SelectorProvider provider, FileDescriptor fd) |
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138 throws IOException { |
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139 this(provider, fd, null); |
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140 } |
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141 |
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142 /** |
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143 * Constructor for sockets obtained from branching |
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144 */ |
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145 public SctpChannelImpl(SelectorProvider provider, |
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146 FileDescriptor fd, |
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147 Association association) |
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148 throws IOException { |
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149 super(provider); |
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150 this.fd = fd; |
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151 this.fdVal = IOUtil.fdVal(fd); |
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152 this.state = ChannelState.CONNECTED; |
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153 port = (Net.localAddress(fd)).getPort(); |
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154 |
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155 if (association != null) { /* branched */ |
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156 this.association = association; |
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157 } else { /* obtained from server channel */ |
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158 /* Receive COMM_UP */ |
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159 ByteBuffer buf = Util.getTemporaryDirectBuffer(50); |
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160 try { |
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161 receive(buf, null, null, true); |
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162 } finally { |
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163 Util.releaseTemporaryDirectBuffer(buf); |
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164 } |
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165 } |
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166 } |
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167 |
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168 /** |
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169 * Binds the channel's socket to a local address. |
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170 */ |
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171 @Override |
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172 public SctpChannel bind(SocketAddress local) throws IOException { |
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173 synchronized (receiveLock) { |
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174 synchronized (sendLock) { |
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175 synchronized (stateLock) { |
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176 ensureOpenAndUnconnected(); |
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177 if (isBound()) |
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178 SctpNet.throwAlreadyBoundException(); |
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179 InetSocketAddress isa = (local == null) ? |
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180 new InetSocketAddress(0) : Net.checkAddress(local); |
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181 Net.bind(fd, isa.getAddress(), isa.getPort()); |
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182 InetSocketAddress boundIsa = Net.localAddress(fd); |
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183 port = boundIsa.getPort(); |
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184 localAddresses.add(isa); |
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185 if (isa.getAddress().isAnyLocalAddress()) |
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186 wildcard = true; |
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187 } |
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188 } |
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189 } |
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190 return this; |
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191 } |
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192 |
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193 @Override |
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194 public SctpChannel bindAddress(InetAddress address) |
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195 throws IOException { |
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196 bindUnbindAddress(address, true); |
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197 localAddresses.add(new InetSocketAddress(address, port)); |
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198 return this; |
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199 } |
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200 |
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201 @Override |
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202 public SctpChannel unbindAddress(InetAddress address) |
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203 throws IOException { |
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204 bindUnbindAddress(address, false); |
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205 localAddresses.remove(new InetSocketAddress(address, port)); |
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206 return this; |
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207 } |
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208 |
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209 private SctpChannel bindUnbindAddress(InetAddress address, boolean add) |
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210 throws IOException { |
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211 if (address == null) |
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212 throw new IllegalArgumentException(); |
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213 |
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214 synchronized (receiveLock) { |
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215 synchronized (sendLock) { |
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216 synchronized (stateLock) { |
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217 if (!isOpen()) |
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218 throw new ClosedChannelException(); |
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219 if (!isBound()) |
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220 throw new NotYetBoundException(); |
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221 if (wildcard) |
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222 throw new IllegalStateException( |
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223 "Cannot add or remove addresses from a channel that is bound to the wildcard address"); |
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224 if (address.isAnyLocalAddress()) |
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225 throw new IllegalArgumentException( |
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226 "Cannot add or remove the wildcard address"); |
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227 if (add) { |
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228 for (InetSocketAddress addr : localAddresses) { |
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229 if (addr.getAddress().equals(address)) { |
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230 SctpNet.throwAlreadyBoundException(); |
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231 } |
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232 } |
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233 } else { /*removing */ |
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234 /* Verify that there is more than one address |
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235 * and that address is already bound */ |
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236 if (localAddresses.size() <= 1) |
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237 throw new IllegalUnbindException("Cannot remove address from a channel with only one address bound"); |
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238 boolean foundAddress = false; |
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239 for (InetSocketAddress addr : localAddresses) { |
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240 if (addr.getAddress().equals(address)) { |
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241 foundAddress = true; |
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242 break; |
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243 } |
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244 } |
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245 if (!foundAddress ) |
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246 throw new IllegalUnbindException("Cannot remove address from a channel that is not bound to that address"); |
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247 } |
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248 |
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249 SctpNet.bindx(fdVal, new InetAddress[]{address}, port, add); |
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250 |
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251 /* Update our internal Set to reflect the addition/removal */ |
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252 if (add) |
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253 localAddresses.add(new InetSocketAddress(address, port)); |
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254 else { |
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255 for (InetSocketAddress addr : localAddresses) { |
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256 if (addr.getAddress().equals(address)) { |
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257 localAddresses.remove(addr); |
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258 break; |
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259 } |
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260 } |
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261 } |
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262 } |
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263 } |
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264 } |
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265 return this; |
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266 } |
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267 |
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268 private boolean isBound() { |
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269 synchronized (stateLock) { |
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270 return port == -1 ? false : true; |
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271 } |
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272 } |
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273 |
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274 private boolean isConnected() { |
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275 synchronized (stateLock) { |
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276 return (state == ChannelState.CONNECTED); |
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277 } |
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278 } |
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279 |
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280 private void ensureOpenAndUnconnected() throws IOException { |
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281 synchronized (stateLock) { |
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282 if (!isOpen()) |
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283 throw new ClosedChannelException(); |
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284 if (isConnected()) |
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285 throw new AlreadyConnectedException(); |
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286 if (state == ChannelState.PENDING) |
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287 throw new ConnectionPendingException(); |
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288 } |
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289 } |
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290 |
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291 private boolean ensureReceiveOpen() throws ClosedChannelException { |
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292 synchronized (stateLock) { |
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293 if (!isOpen()) |
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294 throw new ClosedChannelException(); |
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295 if (!isConnected()) |
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296 throw new NotYetConnectedException(); |
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297 else |
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298 return true; |
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299 } |
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300 } |
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301 |
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302 private void ensureSendOpen() throws ClosedChannelException { |
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303 synchronized (stateLock) { |
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304 if (!isOpen()) |
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305 throw new ClosedChannelException(); |
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306 if (isShutdown) |
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307 throw new ClosedChannelException(); |
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308 if (!isConnected()) |
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309 throw new NotYetConnectedException(); |
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310 } |
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311 } |
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312 |
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313 private void receiverCleanup() throws IOException { |
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314 synchronized (stateLock) { |
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315 receiverThread = 0; |
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316 if (state == ChannelState.KILLPENDING) |
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317 kill(); |
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318 } |
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319 } |
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320 |
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321 private void senderCleanup() throws IOException { |
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322 synchronized (stateLock) { |
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323 senderThread = 0; |
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324 if (state == ChannelState.KILLPENDING) |
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325 kill(); |
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326 } |
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327 } |
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328 |
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329 @Override |
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330 public Association association() throws ClosedChannelException { |
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331 synchronized (stateLock) { |
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332 if (!isOpen()) |
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333 throw new ClosedChannelException(); |
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334 if (!isConnected()) |
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335 return null; |
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336 |
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337 return association; |
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338 } |
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339 } |
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340 |
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341 @Override |
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342 public boolean connect(SocketAddress endpoint) throws IOException { |
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343 synchronized (receiveLock) { |
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344 synchronized (sendLock) { |
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345 ensureOpenAndUnconnected(); |
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346 InetSocketAddress isa = Net.checkAddress(endpoint); |
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347 SecurityManager sm = System.getSecurityManager(); |
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348 if (sm != null) |
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349 sm.checkConnect(isa.getAddress().getHostAddress(), |
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350 isa.getPort()); |
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351 synchronized (blockingLock()) { |
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352 int n = 0; |
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353 try { |
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354 try { |
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355 begin(); |
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356 synchronized (stateLock) { |
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357 if (!isOpen()) { |
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358 return false; |
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359 } |
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360 receiverThread = NativeThread.current(); |
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361 } |
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362 for (;;) { |
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363 InetAddress ia = isa.getAddress(); |
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364 if (ia.isAnyLocalAddress()) |
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365 ia = InetAddress.getLocalHost(); |
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366 n = SctpNet.connect(fdVal, ia, isa.getPort()); |
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367 if ( (n == IOStatus.INTERRUPTED) |
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368 && isOpen()) |
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369 continue; |
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370 break; |
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371 } |
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372 } finally { |
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373 receiverCleanup(); |
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374 end((n > 0) || (n == IOStatus.UNAVAILABLE)); |
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375 assert IOStatus.check(n); |
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376 } |
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377 } catch (IOException x) { |
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378 /* If an exception was thrown, close the channel after |
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379 * invoking end() so as to avoid bogus |
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380 * AsynchronousCloseExceptions */ |
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381 close(); |
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382 throw x; |
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383 } |
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384 |
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385 if (n > 0) { |
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386 synchronized (stateLock) { |
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387 /* Connection succeeded */ |
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388 state = ChannelState.CONNECTED; |
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389 if (!isBound()) { |
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390 InetSocketAddress boundIsa = |
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391 Net.localAddress(fd); |
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392 port = boundIsa.getPort(); |
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393 } |
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394 |
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395 /* Receive COMM_UP */ |
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396 ByteBuffer buf = Util.getTemporaryDirectBuffer(50); |
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397 try { |
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398 receive(buf, null, null, true); |
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399 } finally { |
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400 Util.releaseTemporaryDirectBuffer(buf); |
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401 } |
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402 |
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403 /* cache remote addresses */ |
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404 try { |
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405 remoteAddresses = getRemoteAddresses(); |
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406 } catch (IOException unused) { /* swallow exception */ } |
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407 |
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408 return true; |
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409 } |
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410 } else { |
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411 synchronized (stateLock) { |
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412 /* If nonblocking and no exception then connection |
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413 * pending; disallow another invocation */ |
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414 if (!isBlocking()) |
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415 state = ChannelState.PENDING; |
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416 else |
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417 assert false; |
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418 } |
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419 } |
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420 } |
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421 return false; |
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422 } |
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423 } |
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424 } |
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425 |
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426 @Override |
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427 public boolean connect(SocketAddress endpoint, |
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428 int maxOutStreams, |
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429 int maxInStreams) |
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430 throws IOException { |
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431 ensureOpenAndUnconnected(); |
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432 return setOption(SCTP_INIT_MAXSTREAMS, InitMaxStreams. |
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433 create(maxInStreams, maxOutStreams)).connect(endpoint); |
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434 |
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435 } |
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436 |
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437 @Override |
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438 public boolean isConnectionPending() { |
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439 synchronized (stateLock) { |
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440 return (state == ChannelState.PENDING); |
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441 } |
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442 } |
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443 |
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444 @Override |
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445 public boolean finishConnect() throws IOException { |
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446 synchronized (receiveLock) { |
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447 synchronized (sendLock) { |
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448 synchronized (stateLock) { |
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449 if (!isOpen()) |
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450 throw new ClosedChannelException(); |
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451 if (isConnected()) |
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452 return true; |
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453 if (state != ChannelState.PENDING) |
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454 throw new NoConnectionPendingException(); |
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455 } |
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456 int n = 0; |
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457 try { |
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458 try { |
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459 begin(); |
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460 synchronized (blockingLock()) { |
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461 synchronized (stateLock) { |
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462 if (!isOpen()) { |
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463 return false; |
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464 } |
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465 receiverThread = NativeThread.current(); |
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466 } |
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467 if (!isBlocking()) { |
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468 for (;;) { |
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469 n = checkConnect(fd, false, readyToConnect); |
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470 if ( (n == IOStatus.INTERRUPTED) |
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471 && isOpen()) |
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472 continue; |
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473 break; |
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474 } |
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475 } else { |
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476 for (;;) { |
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477 n = checkConnect(fd, true, readyToConnect); |
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478 if (n == 0) { |
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479 // Loop in case of |
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480 // spurious notifications |
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481 continue; |
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482 } |
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483 if ( (n == IOStatus.INTERRUPTED) |
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484 && isOpen()) |
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485 continue; |
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486 break; |
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487 } |
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488 } |
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489 } |
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490 } finally { |
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491 synchronized (stateLock) { |
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492 receiverThread = 0; |
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493 if (state == ChannelState.KILLPENDING) { |
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494 kill(); |
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495 /* poll()/getsockopt() does not report |
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496 * error (throws exception, with n = 0) |
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497 * on Linux platform after dup2 and |
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498 * signal-wakeup. Force n to 0 so the |
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499 * end() can throw appropriate exception */ |
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500 n = 0; |
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501 } |
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502 } |
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503 end((n > 0) || (n == IOStatus.UNAVAILABLE)); |
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504 assert IOStatus.check(n); |
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505 } |
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506 } catch (IOException x) { |
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507 /* If an exception was thrown, close the channel after |
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508 * invoking end() so as to avoid bogus |
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509 * AsynchronousCloseExceptions */ |
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510 close(); |
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511 throw x; |
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512 } |
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513 |
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514 if (n > 0) { |
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515 synchronized (stateLock) { |
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516 state = ChannelState.CONNECTED; |
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517 if (!isBound()) { |
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518 InetSocketAddress boundIsa = |
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519 Net.localAddress(fd); |
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520 port = boundIsa.getPort(); |
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521 } |
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522 |
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523 /* Receive COMM_UP */ |
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524 ByteBuffer buf = Util.getTemporaryDirectBuffer(50); |
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525 try { |
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526 receive(buf, null, null, true); |
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527 } finally { |
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528 Util.releaseTemporaryDirectBuffer(buf); |
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529 } |
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530 |
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531 /* cache remote addresses */ |
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532 try { |
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533 remoteAddresses = getRemoteAddresses(); |
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534 } catch (IOException unused) { /* swallow exception */ } |
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535 |
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536 return true; |
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537 } |
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538 } |
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539 } |
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540 } |
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541 return false; |
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542 } |
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543 |
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544 @Override |
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545 protected void implConfigureBlocking(boolean block) throws IOException { |
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546 IOUtil.configureBlocking(fd, block); |
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547 } |
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548 |
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549 @Override |
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550 public void implCloseSelectableChannel() throws IOException { |
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551 synchronized (stateLock) { |
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552 SctpNet.preClose(fdVal); |
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553 |
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554 if (receiverThread != 0) |
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555 NativeThread.signal(receiverThread); |
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556 |
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557 if (senderThread != 0) |
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558 NativeThread.signal(senderThread); |
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559 |
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560 if (!isRegistered()) |
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561 kill(); |
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562 } |
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563 } |
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564 |
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565 @Override |
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566 public FileDescriptor getFD() { |
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567 return fd; |
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568 } |
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569 |
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570 @Override |
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571 public int getFDVal() { |
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572 return fdVal; |
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573 } |
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574 |
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575 /** |
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576 * Translates native poll revent ops into a ready operation ops |
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577 */ |
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578 private boolean translateReadyOps(int ops, int initialOps, SelectionKeyImpl sk) { |
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579 int intOps = sk.nioInterestOps(); |
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580 int oldOps = sk.nioReadyOps(); |
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581 int newOps = initialOps; |
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582 |
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583 if ((ops & PollArrayWrapper.POLLNVAL) != 0) { |
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584 /* This should only happen if this channel is pre-closed while a |
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585 * selection operation is in progress |
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586 * ## Throw an error if this channel has not been pre-closed */ |
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587 return false; |
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588 } |
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589 |
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590 if ((ops & (PollArrayWrapper.POLLERR |
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591 | PollArrayWrapper.POLLHUP)) != 0) { |
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592 newOps = intOps; |
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593 sk.nioReadyOps(newOps); |
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594 /* No need to poll again in checkConnect, |
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595 * the error will be detected there */ |
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596 readyToConnect = true; |
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597 return (newOps & ~oldOps) != 0; |
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598 } |
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599 |
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600 if (((ops & PollArrayWrapper.POLLIN) != 0) && |
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601 ((intOps & SelectionKey.OP_READ) != 0) && |
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602 isConnected()) |
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603 newOps |= SelectionKey.OP_READ; |
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604 |
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605 if (((ops & PollArrayWrapper.POLLCONN) != 0) && |
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606 ((intOps & SelectionKey.OP_CONNECT) != 0) && |
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607 ((state == ChannelState.UNCONNECTED) || (state == ChannelState.PENDING))) { |
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608 newOps |= SelectionKey.OP_CONNECT; |
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609 readyToConnect = true; |
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610 } |
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611 |
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612 if (((ops & PollArrayWrapper.POLLOUT) != 0) && |
|
613 ((intOps & SelectionKey.OP_WRITE) != 0) && |
|
614 isConnected()) |
|
615 newOps |= SelectionKey.OP_WRITE; |
|
616 |
|
617 sk.nioReadyOps(newOps); |
|
618 return (newOps & ~oldOps) != 0; |
|
619 } |
|
620 |
|
621 @Override |
|
622 public boolean translateAndUpdateReadyOps(int ops, SelectionKeyImpl sk) { |
|
623 return translateReadyOps(ops, sk.nioReadyOps(), sk); |
|
624 } |
|
625 |
|
626 @Override |
|
627 @SuppressWarnings("all") |
|
628 public boolean translateAndSetReadyOps(int ops, SelectionKeyImpl sk) { |
|
629 return translateReadyOps(ops, 0, sk); |
|
630 } |
|
631 |
|
632 @Override |
|
633 public void translateAndSetInterestOps(int ops, SelectionKeyImpl sk) { |
|
634 int newOps = 0; |
|
635 if ((ops & SelectionKey.OP_READ) != 0) |
|
636 newOps |= PollArrayWrapper.POLLIN; |
|
637 if ((ops & SelectionKey.OP_WRITE) != 0) |
|
638 newOps |= PollArrayWrapper.POLLOUT; |
|
639 if ((ops & SelectionKey.OP_CONNECT) != 0) |
|
640 newOps |= PollArrayWrapper.POLLCONN; |
|
641 sk.selector.putEventOps(sk, newOps); |
|
642 } |
|
643 |
|
644 @Override |
|
645 public void kill() throws IOException { |
|
646 synchronized (stateLock) { |
|
647 if (state == ChannelState.KILLED) |
|
648 return; |
|
649 if (state == ChannelState.UNINITIALIZED) { |
|
650 state = ChannelState.KILLED; |
|
651 return; |
|
652 } |
|
653 assert !isOpen() && !isRegistered(); |
|
654 |
|
655 /* Postpone the kill if there is a waiting reader |
|
656 * or writer thread. */ |
|
657 if (receiverThread == 0 && senderThread == 0) { |
|
658 SctpNet.close(fdVal); |
|
659 state = ChannelState.KILLED; |
|
660 } else { |
|
661 state = ChannelState.KILLPENDING; |
|
662 } |
|
663 } |
|
664 } |
|
665 |
|
666 @Override |
|
667 public <T> SctpChannel setOption(SctpSocketOption<T> name, T value) |
|
668 throws IOException { |
|
669 if (name == null) |
|
670 throw new NullPointerException(); |
|
671 if (!supportedOptions().contains(name)) |
|
672 throw new UnsupportedOperationException("'" + name + "' not supported"); |
|
673 |
|
674 synchronized (stateLock) { |
|
675 if (!isOpen()) |
|
676 throw new ClosedChannelException(); |
|
677 |
|
678 SctpNet.setSocketOption(fdVal, name, value, 0 /*oneToOne*/); |
|
679 } |
|
680 return this; |
|
681 } |
|
682 |
|
683 @Override |
|
684 @SuppressWarnings("unchecked") |
|
685 public <T> T getOption(SctpSocketOption<T> name) throws IOException { |
|
686 if (name == null) |
|
687 throw new NullPointerException(); |
|
688 if (!supportedOptions().contains(name)) |
|
689 throw new UnsupportedOperationException("'" + name + "' not supported"); |
|
690 |
|
691 synchronized (stateLock) { |
|
692 if (!isOpen()) |
|
693 throw new ClosedChannelException(); |
|
694 |
|
695 return (T)SctpNet.getSocketOption(fdVal, name, 0 /*oneToOne*/); |
|
696 } |
|
697 } |
|
698 |
|
699 private static class DefaultOptionsHolder { |
|
700 static final Set<SctpSocketOption<?>> defaultOptions = defaultOptions(); |
|
701 |
|
702 private static Set<SctpSocketOption<?>> defaultOptions() { |
|
703 HashSet<SctpSocketOption<?>> set = new HashSet<SctpSocketOption<?>>(10); |
|
704 set.add(SCTP_DISABLE_FRAGMENTS); |
|
705 set.add(SCTP_EXPLICIT_COMPLETE); |
|
706 set.add(SCTP_FRAGMENT_INTERLEAVE); |
|
707 set.add(SCTP_INIT_MAXSTREAMS); |
|
708 set.add(SCTP_NODELAY); |
|
709 set.add(SCTP_PRIMARY_ADDR); |
|
710 set.add(SCTP_SET_PEER_PRIMARY_ADDR); |
|
711 set.add(SO_SNDBUF); |
|
712 set.add(SO_RCVBUF); |
|
713 set.add(SO_LINGER); |
|
714 return Collections.unmodifiableSet(set); |
|
715 } |
|
716 } |
|
717 |
|
718 @Override |
|
719 public final Set<SctpSocketOption<?>> supportedOptions() { |
|
720 return DefaultOptionsHolder.defaultOptions; |
|
721 } |
|
722 |
|
723 @Override |
|
724 public <T> MessageInfo receive(ByteBuffer buffer, |
|
725 T attachment, |
|
726 NotificationHandler<T> handler) |
|
727 throws IOException { |
|
728 return receive(buffer, attachment, handler, false); |
|
729 } |
|
730 |
|
731 private <T> MessageInfo receive(ByteBuffer buffer, |
|
732 T attachment, |
|
733 NotificationHandler<T> handler, |
|
734 boolean fromConnect) |
|
735 throws IOException { |
|
736 if (buffer == null) |
|
737 throw new IllegalArgumentException("buffer cannot be null"); |
|
738 |
|
739 if (buffer.isReadOnly()) |
|
740 throw new IllegalArgumentException("Read-only buffer"); |
|
741 |
|
742 if (receiveInvoked.get()) |
|
743 throw new IllegalReceiveException( |
|
744 "cannot invoke receive from handler"); |
|
745 receiveInvoked.set(Boolean.TRUE); |
|
746 |
|
747 try { |
|
748 SctpResultContainer resultContainer = new SctpResultContainer(); |
|
749 do { |
|
750 resultContainer.clear(); |
|
751 synchronized (receiveLock) { |
|
752 if (!ensureReceiveOpen()) |
|
753 return null; |
|
754 |
|
755 int n = 0; |
|
756 try { |
|
757 begin(); |
|
758 |
|
759 synchronized (stateLock) { |
|
760 if(!isOpen()) |
|
761 return null; |
|
762 receiverThread = NativeThread.current(); |
|
763 } |
|
764 |
|
765 do { |
|
766 n = receive(fdVal, buffer, resultContainer, fromConnect); |
|
767 } while ((n == IOStatus.INTERRUPTED) && isOpen()); |
|
768 } finally { |
|
769 receiverCleanup(); |
|
770 end((n > 0) || (n == IOStatus.UNAVAILABLE)); |
|
771 assert IOStatus.check(n); |
|
772 } |
|
773 |
|
774 if (!resultContainer.isNotification()) { |
|
775 /* message or nothing */ |
|
776 if (resultContainer.hasSomething()) { |
|
777 /* Set the association before returning */ |
|
778 SctpMessageInfoImpl info = |
|
779 resultContainer.getMessageInfo(); |
|
780 synchronized (stateLock) { |
|
781 assert association != null; |
|
782 info.setAssociation(association); |
|
783 } |
|
784 return info; |
|
785 } else |
|
786 /* Non-blocking may return null if nothing available*/ |
|
787 return null; |
|
788 } else { /* notification */ |
|
789 synchronized (stateLock) { |
|
790 handleNotificationInternal( |
|
791 resultContainer); |
|
792 } |
|
793 } |
|
794 |
|
795 if (fromConnect) { |
|
796 /* If we reach here, then it was connect that invoked |
|
797 * receive and received the COMM_UP. We have already |
|
798 * handled the COMM_UP with the internal notification |
|
799 * handler. Simply return. */ |
|
800 return null; |
|
801 } |
|
802 } /* receiveLock */ |
|
803 } while (handler == null ? true : |
|
804 (invokeNotificationHandler(resultContainer, handler, attachment) |
|
805 == HandlerResult.CONTINUE)); |
|
806 |
|
807 return null; |
|
808 } finally { |
|
809 receiveInvoked.set(Boolean.FALSE); |
|
810 } |
|
811 } |
|
812 |
|
813 private int receive(int fd, |
|
814 ByteBuffer dst, |
|
815 SctpResultContainer resultContainer, |
|
816 boolean peek) |
|
817 throws IOException { |
|
818 int pos = dst.position(); |
|
819 int lim = dst.limit(); |
|
820 assert (pos <= lim); |
|
821 int rem = (pos <= lim ? lim - pos : 0); |
|
822 if (dst instanceof DirectBuffer && rem > 0) |
|
823 return receiveIntoNativeBuffer(fd, resultContainer, dst, rem, pos, peek); |
|
824 |
|
825 /* Substitute a native buffer */ |
|
826 int newSize = Math.max(rem, 1); |
|
827 ByteBuffer bb = Util.getTemporaryDirectBuffer(newSize); |
|
828 try { |
|
829 int n = receiveIntoNativeBuffer(fd, resultContainer, bb, newSize, 0, peek); |
|
830 bb.flip(); |
|
831 if (n > 0 && rem > 0) |
|
832 dst.put(bb); |
|
833 return n; |
|
834 } finally { |
|
835 Util.releaseTemporaryDirectBuffer(bb); |
|
836 } |
|
837 } |
|
838 |
|
839 private int receiveIntoNativeBuffer(int fd, |
|
840 SctpResultContainer resultContainer, |
|
841 ByteBuffer bb, |
|
842 int rem, |
|
843 int pos, |
|
844 boolean peek) |
|
845 throws IOException |
|
846 { |
|
847 int n = receive0(fd, resultContainer, ((DirectBuffer)bb).address() + pos, rem, peek); |
|
848 |
|
849 if (n > 0) |
|
850 bb.position(pos + n); |
|
851 return n; |
|
852 } |
|
853 |
|
854 private InternalNotificationHandler internalNotificationHandler = |
|
855 new InternalNotificationHandler(); |
|
856 |
|
857 private void handleNotificationInternal(SctpResultContainer resultContainer) |
|
858 { |
|
859 invokeNotificationHandler(resultContainer, |
|
860 internalNotificationHandler, null); |
|
861 } |
|
862 |
|
863 private class InternalNotificationHandler |
|
864 extends AbstractNotificationHandler<Object> |
|
865 { |
|
866 @Override |
|
867 public HandlerResult handleNotification( |
|
868 AssociationChangeNotification not, Object unused) { |
|
869 if (not.event().equals( |
|
870 AssociationChangeNotification.AssocChangeEvent.COMM_UP) && |
|
871 association == null) { |
|
872 SctpAssocChange sac = (SctpAssocChange) not; |
|
873 association = new SctpAssociationImpl |
|
874 (sac.assocId(), sac.maxInStreams(), sac.maxOutStreams()); |
|
875 } |
|
876 return HandlerResult.CONTINUE; |
|
877 } |
|
878 } |
|
879 |
|
880 private <T> HandlerResult invokeNotificationHandler |
|
881 (SctpResultContainer resultContainer, |
|
882 NotificationHandler<T> handler, |
|
883 T attachment) { |
|
884 SctpNotification notification = resultContainer.notification(); |
|
885 synchronized (stateLock) { |
|
886 notification.setAssociation(association); |
|
887 } |
|
888 |
|
889 if (!(handler instanceof AbstractNotificationHandler)) { |
|
890 return handler.handleNotification(notification, attachment); |
|
891 } |
|
892 |
|
893 /* AbstractNotificationHandler */ |
|
894 AbstractNotificationHandler<T> absHandler = |
|
895 (AbstractNotificationHandler<T>)handler; |
|
896 switch(resultContainer.type()) { |
|
897 case ASSOCIATION_CHANGED : |
|
898 return absHandler.handleNotification( |
|
899 resultContainer.getAssociationChanged(), attachment); |
|
900 case PEER_ADDRESS_CHANGED : |
|
901 return absHandler.handleNotification( |
|
902 resultContainer.getPeerAddressChanged(), attachment); |
|
903 case SEND_FAILED : |
|
904 return absHandler.handleNotification( |
|
905 resultContainer.getSendFailed(), attachment); |
|
906 case SHUTDOWN : |
|
907 return absHandler.handleNotification( |
|
908 resultContainer.getShutdown(), attachment); |
|
909 default : |
|
910 /* implementation specific handlers */ |
|
911 return absHandler.handleNotification( |
|
912 resultContainer.notification(), attachment); |
|
913 } |
|
914 } |
|
915 |
|
916 private void checkAssociation(Association sendAssociation) { |
|
917 synchronized (stateLock) { |
|
918 if (sendAssociation != null && !sendAssociation.equals(association)) { |
|
919 throw new IllegalArgumentException( |
|
920 "Cannot send to another association"); |
|
921 } |
|
922 } |
|
923 } |
|
924 |
|
925 private void checkStreamNumber(int streamNumber) { |
|
926 synchronized (stateLock) { |
|
927 if (association != null) { |
|
928 if (streamNumber < 0 || |
|
929 streamNumber >= association.maxOutboundStreams()) |
|
930 throw new InvalidStreamException(); |
|
931 } |
|
932 } |
|
933 } |
|
934 |
|
935 /* TODO: Add support for ttl and isComplete to both 121 12M |
|
936 * SCTP_EOR not yet supported on reference platforms |
|
937 * TTL support limited... |
|
938 */ |
|
939 @Override |
|
940 public int send(ByteBuffer buffer, MessageInfo messageInfo) |
|
941 throws IOException { |
|
942 if (buffer == null) |
|
943 throw new IllegalArgumentException("buffer cannot be null"); |
|
944 |
|
945 if (messageInfo == null) |
|
946 throw new IllegalArgumentException("messageInfo cannot be null"); |
|
947 |
|
948 checkAssociation(messageInfo.association()); |
|
949 checkStreamNumber(messageInfo.streamNumber()); |
|
950 |
|
951 synchronized (sendLock) { |
|
952 ensureSendOpen(); |
|
953 |
|
954 int n = 0; |
|
955 try { |
|
956 begin(); |
|
957 |
|
958 synchronized (stateLock) { |
|
959 if(!isOpen()) |
|
960 return 0; |
|
961 senderThread = NativeThread.current(); |
|
962 } |
|
963 |
|
964 do { |
|
965 n = send(fdVal, buffer, messageInfo); |
|
966 } while ((n == IOStatus.INTERRUPTED) && isOpen()); |
|
967 |
|
968 return IOStatus.normalize(n); |
|
969 } finally { |
|
970 senderCleanup(); |
|
971 end((n > 0) || (n == IOStatus.UNAVAILABLE)); |
|
972 assert IOStatus.check(n); |
|
973 } |
|
974 } |
|
975 } |
|
976 |
|
977 private int send(int fd, ByteBuffer src, MessageInfo messageInfo) |
|
978 throws IOException { |
|
979 int streamNumber = messageInfo.streamNumber(); |
|
980 SocketAddress target = messageInfo.address(); |
|
981 boolean unordered = messageInfo.isUnordered(); |
|
982 int ppid = messageInfo.payloadProtocolID(); |
|
983 |
|
984 if (src instanceof DirectBuffer) |
|
985 return sendFromNativeBuffer(fd, src, target, streamNumber, |
|
986 unordered, ppid); |
|
987 |
|
988 /* Substitute a native buffer */ |
|
989 int pos = src.position(); |
|
990 int lim = src.limit(); |
|
991 assert (pos <= lim && streamNumber >= 0); |
|
992 |
|
993 int rem = (pos <= lim ? lim - pos : 0); |
|
994 ByteBuffer bb = Util.getTemporaryDirectBuffer(rem); |
|
995 try { |
|
996 bb.put(src); |
|
997 bb.flip(); |
|
998 /* Do not update src until we see how many bytes were written */ |
|
999 src.position(pos); |
|
1000 |
|
1001 int n = sendFromNativeBuffer(fd, bb, target, streamNumber, |
|
1002 unordered, ppid); |
|
1003 if (n > 0) { |
|
1004 /* now update src */ |
|
1005 src.position(pos + n); |
|
1006 } |
|
1007 return n; |
|
1008 } finally { |
|
1009 Util.releaseTemporaryDirectBuffer(bb); |
|
1010 } |
|
1011 } |
|
1012 |
|
1013 private int sendFromNativeBuffer(int fd, |
|
1014 ByteBuffer bb, |
|
1015 SocketAddress target, |
|
1016 int streamNumber, |
|
1017 boolean unordered, |
|
1018 int ppid) |
|
1019 throws IOException { |
|
1020 int pos = bb.position(); |
|
1021 int lim = bb.limit(); |
|
1022 assert (pos <= lim); |
|
1023 int rem = (pos <= lim ? lim - pos : 0); |
|
1024 |
|
1025 int written = send0(fd, ((DirectBuffer)bb).address() + pos, |
|
1026 rem, target, -1 /*121*/, streamNumber, unordered, ppid); |
|
1027 if (written > 0) |
|
1028 bb.position(pos + written); |
|
1029 return written; |
|
1030 } |
|
1031 |
|
1032 @Override |
|
1033 public SctpChannel shutdown() throws IOException { |
|
1034 synchronized(stateLock) { |
|
1035 if (isShutdown) |
|
1036 return this; |
|
1037 |
|
1038 ensureSendOpen(); |
|
1039 SctpNet.shutdown(fdVal, -1); |
|
1040 if (senderThread != 0) |
|
1041 NativeThread.signal(senderThread); |
|
1042 isShutdown = true; |
|
1043 } |
|
1044 return this; |
|
1045 } |
|
1046 |
|
1047 @Override |
|
1048 public Set<SocketAddress> getAllLocalAddresses() |
|
1049 throws IOException { |
|
1050 synchronized (stateLock) { |
|
1051 if (!isOpen()) |
|
1052 throw new ClosedChannelException(); |
|
1053 if (!isBound()) |
|
1054 return Collections.emptySet(); |
|
1055 |
|
1056 return SctpNet.getLocalAddresses(fdVal); |
|
1057 } |
|
1058 } |
|
1059 |
|
1060 @Override |
|
1061 public Set<SocketAddress> getRemoteAddresses() |
|
1062 throws IOException { |
|
1063 synchronized (stateLock) { |
|
1064 if (!isOpen()) |
|
1065 throw new ClosedChannelException(); |
|
1066 if (!isConnected() || isShutdown) |
|
1067 return Collections.emptySet(); |
|
1068 |
|
1069 try { |
|
1070 return SctpNet.getRemoteAddresses(fdVal, 0/*unused*/); |
|
1071 } catch (SocketException unused) { |
|
1072 /* an open connected channel should always have remote addresses */ |
|
1073 return remoteAddresses; |
|
1074 } |
|
1075 } |
|
1076 } |
|
1077 |
|
1078 /* Native */ |
|
1079 private static native void initIDs(); |
|
1080 |
|
1081 static native int receive0(int fd, SctpResultContainer resultContainer, |
|
1082 long address, int length, boolean peek) throws IOException; |
|
1083 |
|
1084 static native int send0(int fd, long address, int length, |
|
1085 SocketAddress target, int assocId, int streamNumber, |
|
1086 boolean unordered, int ppid) throws IOException; |
|
1087 |
|
1088 private static native int checkConnect(FileDescriptor fd, boolean block, |
|
1089 boolean ready) throws IOException; |
|
1090 |
|
1091 static { |
|
1092 Util.load(); /* loads nio & net native libraries */ |
|
1093 java.security.AccessController.doPrivileged( |
|
1094 new sun.security.action.LoadLibraryAction("sctp")); |
|
1095 initIDs(); |
|
1096 } |
|
1097 } |
|