| /* Copyright (c) 2005-2008 Jan S. Rellermeyer |
| * Systems Group, |
| * Department of Computer Science, ETH Zurich. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * - Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - Neither the name of ETH Zurich nor the names of its contributors may be |
| * used to endorse or promote products derived from this software without |
| * specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| package ch.ethz.iks.slp.impl; |
| |
| import java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| import ch.ethz.iks.slp.ServiceLocationException; |
| import ch.ethz.iks.slp.ServiceURL; |
| |
| /** |
| * a ServiceReply Message is sent as reaction to a ServiceRequest. |
| * |
| * @author Jan S. Rellermeyer, ETH Z�rich |
| * @since 0.1 |
| */ |
| class ServiceReply extends ReplyMessage { |
| /** |
| * a List of ServiceURLs. |
| */ |
| List urlList; |
| |
| /** |
| * create a new ServiceReply from a list of ServiceURLs. |
| * |
| * @param req |
| * the ServiceRequest to reply to. |
| * @param urls |
| * the result URLs. |
| */ |
| ServiceReply(final ServiceRequest req, final List urls) { |
| this.funcID = SRVRPLY; |
| this.xid = req.xid; |
| this.locale = req.locale; |
| this.address = req.address; |
| this.port = req.port; |
| this.errorCode = 0; |
| this.urlList = urls; |
| } |
| |
| /** |
| * create a new ServiceReply from a DataInput streaming the bytes of an |
| * ServiceReply message body. |
| * |
| * @param input |
| * stream of bytes forming the message body. |
| * @throws ServiceLocationException |
| * in case that the IO caused an exception. |
| * @throws IOException |
| */ |
| ServiceReply(final DataInputStream input) throws ServiceLocationException, |
| IOException { |
| errorCode = input.readShort(); |
| short entryCount = input.readShort(); |
| urlList = new ArrayList(); |
| |
| for (int i = 0; i < entryCount; i++) { |
| urlList.add(ServiceURL.fromBytes(input)); |
| } |
| if (SLPCore.CONFIG.getSecurityEnabled()) { |
| if (!verify()) |
| throw new ServiceLocationException( |
| ServiceLocationException.AUTHENTICATION_FAILED, |
| toString()); |
| } |
| } |
| |
| /** |
| * get the bytes of the message body in the following RFC 2608 compliant |
| * format: |
| * <p> |
| * |
| * <pre> |
| * 0 1 2 3 |
| * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * | Service Location header (function = SrvRply = 2) | |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * | Error Code | URL Entry count | |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * | <URL Entry 1> ... <URL Entry N> \ |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * |
| * </pre> |
| * |
| * </p> |
| * |
| * @return array of bytes. |
| * @throws ServiceLocationException |
| * if an IO Exception occurs. |
| */ |
| protected void writeTo(final DataOutputStream out) throws IOException { |
| out.writeShort(errorCode); |
| out.writeShort(urlList.size()); |
| for (int i = 0; i < urlList.size(); i++) { |
| ((ServiceURL) urlList.get(i)).writeTo(out); |
| } |
| } |
| |
| /** |
| * get the length of the message. |
| * |
| * @return the length of the message. |
| * @see ch.ethz.iks.slp.impl.SLPMessage#getSize() |
| */ |
| protected int getSize() { |
| int len = getHeaderSize() + 2 + 2; |
| for (int i = 0; i < urlList.size(); i++) { |
| len += ((ServiceURL) urlList.get(i)).getLength(); |
| } |
| return len; |
| } |
| |
| List getResult() { |
| return urlList; |
| } |
| |
| /** |
| * get a string representation of the AttributeReply message. |
| * |
| * @return a String displaying the properties of this message instance. |
| */ |
| public String toString() { |
| StringBuffer buffer = new StringBuffer(); |
| buffer.append(super.toString()); |
| buffer.append(", errorCode " + errorCode); |
| buffer.append(", URLCount " + urlList.size()); |
| buffer.append(", URLs " + urlList); |
| return buffer.toString(); |
| } |
| |
| /** |
| * sign the ServiceReply. |
| * |
| * @param spiStr |
| * the SPI String. |
| * @throws ServiceLocationException |
| * in case of IO errors. |
| */ |
| void sign(final String spiStr) throws ServiceLocationException { |
| List spiList = stringToList(spiStr, ","); |
| for (Iterator urlIter = urlList.iterator(); urlIter.hasNext();) { |
| ServiceURL url = (ServiceURL) urlIter.next(); |
| url.sign(spiList); |
| } |
| } |
| |
| /** |
| * verify the ServiceReply. |
| * |
| * @return true if it could be verified. |
| * @throws ServiceLocationException |
| * in case of IO errors. |
| */ |
| boolean verify() throws ServiceLocationException { |
| for (Iterator urlIter = urlList.iterator(); urlIter.hasNext();) { |
| ServiceURL url = (ServiceURL) urlIter.next(); |
| if (!url.verify()) { |
| return false; |
| } |
| } |
| return true; |
| } |
| } |