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https://gitlab.linphone.org/BC/public/linphone-iphone.git
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2b8200409c
git-svn-id: svn+ssh://svn.savannah.nongnu.org/linphone/trunk@1 3f6dc0c8-ddfe-455d-9043-3cd528dc4637
82 lines
No EOL
2.7 KiB
Java
82 lines
No EOL
2.7 KiB
Java
/*
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* This file is part of JSTUN.
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*
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* Copyright (c) 2005 Thomas King <king@t-king.de> - All rights
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* reserved.
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*
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* This software is licensed under either the GNU Public License (GPL),
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* or the Apache 2.0 license. Copies of both license agreements are
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* included in this distribution.
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*/
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package de.javawi.jstun.attribute;
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import java.util.*;
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import de.javawi.jstun.util.Utility;
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import de.javawi.jstun.util.UtilityException;
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public class UnknownAttribute extends MessageAttribute {
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/*
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* 0 1 2 3
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* 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
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Attribute 1 Type | Attribute 2 Type |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Attribute 3 Type | Attribute 4 Type ...
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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Vector<MessageAttributeType> unkown = new Vector<MessageAttributeType>();
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public UnknownAttribute() {
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super(MessageAttribute.MessageAttributeType.UnknownAttribute);
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}
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public void addAttribute(MessageAttributeType attribute) {
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unkown.add(attribute);
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}
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public byte[] getBytes() throws UtilityException {
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int length = 0;
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if (unkown.size()%2 == 1) {
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length = 2 * (unkown.size() + 1) + 4;
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} else {
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length = 2 * unkown.size() + 4;
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}
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byte[] result = new byte[length];
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// message attribute header
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// type
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System.arraycopy(Utility.integerToTwoBytes(typeToInteger(type)), 0, result, 0, 2);
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// length
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System.arraycopy(Utility.integerToTwoBytes(length - 4), 0, result, 2, 2);
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// unkown attribute header
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Iterator<MessageAttributeType> it = unkown.iterator();
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while(it.hasNext()) {
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MessageAttributeType attri = it.next();
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System.arraycopy(Utility.integerToTwoBytes(typeToInteger(attri)), 0, result, 4, 2);
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}
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// padding
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if (unkown.size()%2 == 1) {
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System.arraycopy(Utility.integerToTwoBytes(typeToInteger(unkown.elementAt(1))), 0, result, 4, 2);
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}
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return result;
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}
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public static UnknownAttribute parse(byte[] data) throws MessageAttributeParsingException {
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try {
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UnknownAttribute result = new UnknownAttribute();
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if (data.length % 4 != 0) throw new MessageAttributeParsingException("Data array too short");
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for (int i = 0; i < data.length; i += 4) {
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byte[] temp = new byte[4];
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System.arraycopy(data, i, temp, 0, 4);
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long attri = Utility.fourBytesToLong(temp);
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result.addAttribute(MessageAttribute.intToType(attri));
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}
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return result;
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} catch (UtilityException ue) {
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throw new MessageAttributeParsingException("Parsing error");
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}
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}
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} |