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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1999 by Sun Microsystems, Inc.
* All rights reserved.
*
*/
// CDAAdvert.java: Message class for SLP CDAAdvert message
// Author: James Kempf
// Created On: Fri Oct 10 10:48:05 1997
// Last Modified By: James Kempf
// Last Modified On: Fri Jan 29 09:24:50 1999
// Update Count: 134
//
package com.sun.slp;
import java.util.*;
import java.io.*;
/**
* The CDAAdvert class models the SLP DAAdvert message, client side.
* We need to accommodate SLPv1 by using an initialize() method.
*
* @author James Kempf
*/
class CDAAdvert extends SrvLocMsgImpl {
ServiceURL URL = null; // The DA's service URL
long timestamp = 0; // timestamp.
Vector attrs = new Vector(); // Attributes
Hashtable authBlock = null; // Scope auth blocks.
String spis = null; // Supported SPIs
// Construct a CDAAdvert from the input stream.
CDAAdvert(SrvLocHeader hdr, DataInputStream dis)
throws ServiceLocationException, IOException {
super(hdr, SrvLocHeader.DAAdvert);
this.initialize(dis);
}
// Initialize the object from the input stream.
protected void initialize(DataInputStream dis)
throws ServiceLocationException, IOException {
SLPHeaderV2 hdr = (SLPHeaderV2)getHeader();
// Parse in the timestamp. Save bytes for auth block.
byte[] tsBytes = new byte[4];
timestamp = getInt32(hdr, dis, tsBytes);
// Parse in DA's service URL.
StringBuffer buf = new StringBuffer();
byte[] urlBytes = hdr.getString(buf, dis);
int lifetime = getDAURLLifetime();
String surl = buf.toString();
// Parse in the scope list.
byte[] scopeBytes = hdr.getString(buf, dis);
hdr.scopes = hdr.parseCommaSeparatedListIn(buf.toString(), true);
// Unescape scope strigns.
hdr.unescapeScopeStrings(hdr.scopes);
// Validate scope list.
DATable.validateScopes(hdr.scopes, hdr.locale);
// Parse in attribute list.
byte[] attrBytes = hdr.parseAttributeVectorIn(attrs, dis, false);
// Parse in the SPI list
byte[] spiBytes = hdr.getString(buf, dis);
spis = buf.toString();
// Construct bytes for auth.
Object[] message = new Object[9];
message[0] = tsBytes;
// None of the strings have leading length fields, so add them here
ByteArrayOutputStream abaos = new ByteArrayOutputStream();
hdr.putInteger(urlBytes.length, abaos);
message[1] = abaos.toByteArray();
message[2] = urlBytes;
abaos = new ByteArrayOutputStream();
hdr.putInteger(attrBytes.length, abaos);
message[3] = abaos.toByteArray();
message[4] = attrBytes;
abaos = new ByteArrayOutputStream();
hdr.putInteger(scopeBytes.length, abaos);
message[5] = abaos.toByteArray();
message[6] = scopeBytes;
abaos = new ByteArrayOutputStream();
hdr.putInteger(spiBytes.length, abaos);
message[7] = abaos.toByteArray();
message[8] = spiBytes;
// Parse in an auth block, if there.
authBlock = hdr.parseSignatureIn(message, dis);
if (authBlock != null) {
lifetime = AuthBlock.getShortestLifetime(authBlock);
}
// Create URL.
try {
URL = new ServiceURL(surl, lifetime);
} catch (IllegalArgumentException ex) {
throw
new ServiceLocationException(
ServiceLocationException.PARSE_ERROR,
"malformed_url",
new Object[] {ex.getMessage()});
}
// Validate the service URL.
ServiceType serviceType = URL.getServiceType();
if (!serviceType.equals(Defaults.DA_SERVICE_TYPE)) {
throw
new ServiceLocationException(
ServiceLocationException.PARSE_ERROR,
"not_right_url",
new Object[] {URL, "DA"});
}
// Set number of replies to one.
hdr.iNumReplies = 1;
}
// Get the timestamp.
static private long getInt32(SrvLocHeader hdr,
DataInputStream dis,
byte[] bytes)
throws ServiceLocationException, IOException {
bytes[0] = (byte)dis.read();
bytes[1] = (byte)dis.read();
bytes[2] = (byte)dis.read();
bytes[3] = (byte)dis.read();
long a = (long)((char)bytes[0] & 0xFF);
long b = (long)((char)bytes[1] & 0xFF);
long c = (long)((char)bytes[2] & 0xFF);
long d = (long)((char)bytes[3] & 0xFF);
long i = a << 24;
i += b << 16;
i += c << 8;
i += d;
hdr.nbytes += 4;
return i;
}
// Return true if the advert indicates that the DA is going down.
boolean isGoingDown() {
return (timestamp == 0);
}
// Return true if the advert was unsolicited.
boolean isUnsolicited() {
return (hdr.xid == 0);
}
// Set is solicited. No-op for V2, since messages already know.
void setIsUnsolicited(boolean flag) {
}
// Calcualte DA URL lifetime, based on active discovery interval and
// granularity.
private int getDAURLLifetime() {
// Calculate lifetime based on maximum length of time between
// active discoveries. We add a fudge factor to avoid problems
// with scheduler granularity.
SLPConfig config = SLPConfig.getSLPConfig();
int disInt = config.getActiveDiscoveryInterval();
int granInt = config.getActiveDiscoveryGranularity();
// If the discovery interval is zero, then the granularity will be
// also, and active discovery is off. In principle, it doesn't
// matter what the DA URL interval is because active discovery
// won't find any, because its off.
if (disInt <= 0) {
return ServiceURL.LIFETIME_MAXIMUM;
} else {
int lifetime = disInt + granInt;
return
(lifetime > ServiceURL.LIFETIME_MAXIMUM ?
ServiceURL.LIFETIME_MAXIMUM:lifetime);
}
}
}
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