1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 1999 by Sun Microsystems, Inc. 23 * All rights reserved. 24 * 25 */ 26 27 // CDAAdvert.java: Message class for SLP CDAAdvert message 28 // Author: James Kempf 29 // Created On: Fri Oct 10 10:48:05 1997 30 // Last Modified By: James Kempf 31 // Last Modified On: Fri Jan 29 09:24:50 1999 32 // Update Count: 134 33 // 34 35 package com.sun.slp; 36 37 import java.util.*; 38 import java.io.*; 39 40 41 /** 42 * The CDAAdvert class models the SLP DAAdvert message, client side. 43 * We need to accommodate SLPv1 by using an initialize() method. 44 * 45 * @author James Kempf 46 */ 47 48 49 class CDAAdvert extends SrvLocMsgImpl { 50 51 ServiceURL URL = null; // The DA's service URL 52 long timestamp = 0; // timestamp. 53 Vector attrs = new Vector(); // Attributes 54 Hashtable authBlock = null; // Scope auth blocks. 55 String spis = null; // Supported SPIs 56 57 // Construct a CDAAdvert from the input stream. 58 59 CDAAdvert(SrvLocHeader hdr, DataInputStream dis) 60 throws ServiceLocationException, IOException { 61 super(hdr, SrvLocHeader.DAAdvert); 62 63 this.initialize(dis); 64 65 } 66 67 // Initialize the object from the input stream. 68 69 protected void initialize(DataInputStream dis) 70 throws ServiceLocationException, IOException { 71 72 SLPHeaderV2 hdr = (SLPHeaderV2)getHeader(); 73 74 // Parse in the timestamp. Save bytes for auth block. 75 76 byte[] tsBytes = new byte[4]; 77 78 timestamp = getInt32(hdr, dis, tsBytes); 79 80 // Parse in DA's service URL. 81 82 StringBuffer buf = new StringBuffer(); 83 84 byte[] urlBytes = hdr.getString(buf, dis); 85 86 int lifetime = getDAURLLifetime(); 87 88 String surl = buf.toString(); 89 90 // Parse in the scope list. 91 92 byte[] scopeBytes = hdr.getString(buf, dis); 93 94 hdr.scopes = hdr.parseCommaSeparatedListIn(buf.toString(), true); 95 96 // Unescape scope strigns. 97 98 hdr.unescapeScopeStrings(hdr.scopes); 99 100 // Validate scope list. 101 102 DATable.validateScopes(hdr.scopes, hdr.locale); 103 104 // Parse in attribute list. 105 106 byte[] attrBytes = hdr.parseAttributeVectorIn(attrs, dis, false); 107 108 // Parse in the SPI list 109 byte[] spiBytes = hdr.getString(buf, dis); 110 spis = buf.toString(); 111 112 // Construct bytes for auth. 113 Object[] message = new Object[9]; 114 115 message[0] = tsBytes; 116 117 // None of the strings have leading length fields, so add them here 118 ByteArrayOutputStream abaos = new ByteArrayOutputStream(); 119 hdr.putInteger(urlBytes.length, abaos); 120 message[1] = abaos.toByteArray(); 121 message[2] = urlBytes; 122 123 abaos = new ByteArrayOutputStream(); 124 hdr.putInteger(attrBytes.length, abaos); 125 message[3] = abaos.toByteArray(); 126 message[4] = attrBytes; 127 128 abaos = new ByteArrayOutputStream(); 129 hdr.putInteger(scopeBytes.length, abaos); 130 message[5] = abaos.toByteArray(); 131 message[6] = scopeBytes; 132 133 abaos = new ByteArrayOutputStream(); 134 hdr.putInteger(spiBytes.length, abaos); 135 message[7] = abaos.toByteArray(); 136 message[8] = spiBytes; 137 138 // Parse in an auth block, if there. 139 140 authBlock = hdr.parseSignatureIn(message, dis); 141 142 if (authBlock != null) { 143 lifetime = AuthBlock.getShortestLifetime(authBlock); 144 145 } 146 147 // Create URL. 148 149 try { 150 151 URL = new ServiceURL(surl, lifetime); 152 153 } catch (IllegalArgumentException ex) { 154 155 throw 156 new ServiceLocationException( 157 ServiceLocationException.PARSE_ERROR, 158 "malformed_url", 159 new Object[] {ex.getMessage()}); 160 161 } 162 163 // Validate the service URL. 164 165 ServiceType serviceType = URL.getServiceType(); 166 167 if (!serviceType.equals(Defaults.DA_SERVICE_TYPE)) { 168 throw 169 new ServiceLocationException( 170 ServiceLocationException.PARSE_ERROR, 171 "not_right_url", 172 new Object[] {URL, "DA"}); 173 174 } 175 176 // Set number of replies to one. 177 178 hdr.iNumReplies = 1; 179 } 180 181 182 // Get the timestamp. 183 184 static private long getInt32(SrvLocHeader hdr, 185 DataInputStream dis, 186 byte[] bytes) 187 throws ServiceLocationException, IOException { 188 189 bytes[0] = (byte)dis.read(); 190 bytes[1] = (byte)dis.read(); 191 bytes[2] = (byte)dis.read(); 192 bytes[3] = (byte)dis.read(); 193 194 long a = (long)((char)bytes[0] & 0xFF); 195 long b = (long)((char)bytes[1] & 0xFF); 196 long c = (long)((char)bytes[2] & 0xFF); 197 long d = (long)((char)bytes[3] & 0xFF); 198 199 long i = a << 24; 200 i += b << 16; 201 i += c << 8; 202 i += d; 203 204 hdr.nbytes += 4; 205 206 return i; 207 } 208 209 // Return true if the advert indicates that the DA is going down. 210 211 boolean isGoingDown() { 212 return (timestamp == 0); 213 214 } 215 216 // Return true if the advert was unsolicited. 217 218 boolean isUnsolicited() { 219 return (hdr.xid == 0); 220 221 } 222 223 // Set is solicited. No-op for V2, since messages already know. 224 225 void setIsUnsolicited(boolean flag) { 226 227 } 228 229 // Calcualte DA URL lifetime, based on active discovery interval and 230 // granularity. 231 232 private int getDAURLLifetime() { 233 234 // Calculate lifetime based on maximum length of time between 235 // active discoveries. We add a fudge factor to avoid problems 236 // with scheduler granularity. 237 238 SLPConfig config = SLPConfig.getSLPConfig(); 239 240 int disInt = config.getActiveDiscoveryInterval(); 241 int granInt = config.getActiveDiscoveryGranularity(); 242 243 // If the discovery interval is zero, then the granularity will be 244 // also, and active discovery is off. In principle, it doesn't 245 // matter what the DA URL interval is because active discovery 246 // won't find any, because its off. 247 248 if (disInt <= 0) { 249 return ServiceURL.LIFETIME_MAXIMUM; 250 251 } else { 252 int lifetime = disInt + granInt; 253 254 return 255 (lifetime > ServiceURL.LIFETIME_MAXIMUM ? 256 ServiceURL.LIFETIME_MAXIMUM:lifetime); 257 258 } 259 } 260 } 261