diff options
Diffstat (limited to 'src/net/java/sip/communicator/impl/protocol/zeroconf/jmdns/DNSOutgoing.java')
-rw-r--r-- | src/net/java/sip/communicator/impl/protocol/zeroconf/jmdns/DNSOutgoing.java | 405 |
1 files changed, 0 insertions, 405 deletions
diff --git a/src/net/java/sip/communicator/impl/protocol/zeroconf/jmdns/DNSOutgoing.java b/src/net/java/sip/communicator/impl/protocol/zeroconf/jmdns/DNSOutgoing.java deleted file mode 100644 index 4d099b8..0000000 --- a/src/net/java/sip/communicator/impl/protocol/zeroconf/jmdns/DNSOutgoing.java +++ /dev/null @@ -1,405 +0,0 @@ -/* - * Jitsi, the OpenSource Java VoIP and Instant Messaging client. - * - * Copyright 2003-2005 Arthur van Hoff Rick Blair - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -package net.java.sip.communicator.impl.protocol.zeroconf.jmdns; - -import java.io.*; -import java.util.*; -import java.util.logging.*; - -/** - * An outgoing DNS message. - * - * @version %I%, %G% - * @author Arthur van Hoff, Rick Blair, Werner Randelshofer - */ -final class DNSOutgoing -{ - private static Logger logger = - Logger.getLogger(DNSOutgoing.class.toString()); - - int id; - int flags; - private boolean multicast; - private int numQuestions; - private int numAnswers; - private int numAuthorities; - private int numAdditionals; - private Hashtable<String, Integer> names; - - byte data[]; - int off; - int len; - - /** - * Create an outgoing multicast query or response. - */ - DNSOutgoing(int flags) - { - this(flags, true); - - } - - /** - * Create an outgoing query or response. - */ - DNSOutgoing(int flags, boolean multicast) - { - String SLevel = System.getProperty("jmdns.debug"); - if (SLevel == null) SLevel = "INFO"; - logger.setLevel(Level.parse(SLevel)); - - this.flags = flags; - this.multicast = multicast; - names = new Hashtable<String, Integer>(); - data = new byte[DNSConstants.MAX_MSG_TYPICAL]; - off = 12; - } - - /** - * Add a question to the message. - */ - void addQuestion(DNSQuestion rec) throws IOException - { - if (numAnswers > 0 || numAuthorities > 0 || numAdditionals > 0) - { - throw new IllegalStateException("Questions must be added before answers"); - } - numQuestions++; - writeQuestion(rec); - } - - /** - * Add an answer if it is not suppressed. - */ - void addAnswer(DNSIncoming in, DNSRecord rec) throws IOException - { - if (numAuthorities > 0 || numAdditionals > 0) - { - throw new IllegalStateException( - "Answers must be added before authorities and additionals"); - } - if (!rec.suppressedBy(in)) - { - addAnswer(rec, 0); - } - } - - /** - * Add an additional answer to the record. Omit if there is no room. - */ - void addAdditionalAnswer(DNSIncoming in, DNSRecord rec) throws IOException - { - if ((off < DNSConstants.MAX_MSG_TYPICAL - 200) && !rec.suppressedBy(in)) - { - writeRecord(rec, 0); - numAdditionals++; - } - } - - /** - * Add an answer to the message. - */ - void addAnswer(DNSRecord rec, long now) throws IOException - { - if (numAuthorities > 0 || numAdditionals > 0) - { - throw new IllegalStateException( - "Questions must be added before answers"); - } - if (rec != null) - { - if ((now == 0) || !rec.isExpired(now)) - { - writeRecord(rec, now); - numAnswers++; - } - } - } - - private LinkedList<DNSRecord> authorativeAnswers = new LinkedList<DNSRecord>(); - - /** - * Add an authorative answer to the message. - */ - void addAuthorativeAnswer(DNSRecord rec) throws IOException - { - if (numAdditionals > 0) - { - throw new IllegalStateException( - "Authorative answers must be added before additional answers"); - } - authorativeAnswers.add(rec); - writeRecord(rec, 0); - numAuthorities++; - - // VERIFY: - - } - - void writeByte(int value) throws IOException - { - if (off >= data.length) - { - throw new IOException("buffer full"); - } - data[off++] = (byte) value; - } - - void writeBytes(String str, int off, int len) throws IOException - { - for (int i = 0; i < len; i++) - { - writeByte(str.charAt(off + i)); - } - } - - void writeBytes(byte data[]) throws IOException - { - if (data != null) - { - writeBytes(data, 0, data.length); - } - } - - void writeBytes(byte data[], int off, int len) throws IOException - { - for (int i = 0; i < len; i++) - { - writeByte(data[off + i]); - } - } - - void writeShort(int value) throws IOException - { - writeByte(value >> 8); - writeByte(value); - } - - void writeInt(int value) throws IOException - { - writeShort(value >> 16); - writeShort(value); - } - - void writeUTF(String str, int off, int len) throws IOException - { - // compute utf length - int utflen = 0; - for (int i = 0; i < len; i++) - { - int ch = str.charAt(off + i); - if ((ch >= 0x0001) && (ch <= 0x007F)) - { - utflen += 1; - } - else - { - if (ch > 0x07FF) - { - utflen += 3; - } - else - { - utflen += 2; - } - } - } - // write utf length - writeByte(utflen); - // write utf data - for (int i = 0; i < len; i++) - { - int ch = str.charAt(off + i); - if ((ch >= 0x0001) && (ch <= 0x007F)) - { - writeByte(ch); - } - else - { - if (ch > 0x07FF) - { - writeByte(0xE0 | ((ch >> 12) & 0x0F)); - writeByte(0x80 | ((ch >> 6) & 0x3F)); - writeByte(0x80 | ((ch >> 0) & 0x3F)); - } - else - { - writeByte(0xC0 | ((ch >> 6) & 0x1F)); - writeByte(0x80 | ((ch >> 0) & 0x3F)); - } - } - } - } - - void writeName(String name) throws IOException - { - while (true) - { - int n = name.indexOf('.'); - if (n < 0) - { - n = name.length(); - } - if (n <= 0) - { - writeByte(0); - return; - } - Integer offset = names.get(name); - if (offset != null) - { - int val = offset.intValue(); - - if (val > off) - { - logger.log(Level.WARNING, - "DNSOutgoing writeName failed val=" + val + " name=" + name); - } - - writeByte((val >> 8) | 0xC0); - writeByte(val); - return; - } - names.put(name, off); - writeUTF(name, 0, n); - name = name.substring(n); - if (name.startsWith(".")) - { - name = name.substring(1); - } - } - } - - void writeQuestion(DNSQuestion question) throws IOException - { - writeName(question.name); - writeShort(question.type); - writeShort(question.clazz); - } - - void writeRecord(DNSRecord rec, long now) throws IOException - { - int save = off; - try - { - writeName(rec.name); - writeShort(rec.type); - writeShort(rec.clazz | - ((rec.unique && multicast) ? DNSConstants.CLASS_UNIQUE : 0)); - writeInt((now == 0) ? rec.ttl : rec.getRemainingTTL(now)); - writeShort(0); - int start = off; - rec.write(this); - int len = off - start; - data[start - 2] = (byte) (len >> 8); - data[start - 1] = (byte) (len & 0xFF); - } - catch (IOException e) - { - off = save; - throw e; - } - } - - /** - * Finish the message before sending it off. - */ - void finish() throws IOException - { - int save = off; - off = 0; - - writeShort(multicast ? 0 : id); - writeShort(flags); - writeShort(numQuestions); - writeShort(numAnswers); - writeShort(numAuthorities); - writeShort(numAdditionals); - off = save; - } - - boolean isQuery() - { - return (flags & DNSConstants.FLAGS_QR_MASK) == - DNSConstants.FLAGS_QR_QUERY; - } - - public boolean isEmpty() - { - return numQuestions == 0 && numAuthorities == 0 - && numAdditionals == 0 && numAnswers == 0; - } - - - @Override - public String toString() - { - StringBuffer buf = new StringBuffer(); - buf.append(isQuery() ? "dns[query," : "dns[response,"); - //buf.append(packet.getAddress().getHostAddress()); - buf.append(':'); - //buf.append(packet.getPort()); - //buf.append(",len="); - //buf.append(packet.getLength()); - buf.append(",id=0x"); - buf.append(Integer.toHexString(id)); - if (flags != 0) - { - buf.append(",flags=0x"); - buf.append(Integer.toHexString(flags)); - if ((flags & DNSConstants.FLAGS_QR_RESPONSE) != 0) - { - buf.append(":r"); - } - if ((flags & DNSConstants.FLAGS_AA) != 0) - { - buf.append(":aa"); - } - if ((flags & DNSConstants.FLAGS_TC) != 0) - { - buf.append(":tc"); - } - } - if (numQuestions > 0) - { - buf.append(",questions="); - buf.append(numQuestions); - } - if (numAnswers > 0) - { - buf.append(",answers="); - buf.append(numAnswers); - } - if (numAuthorities > 0) - { - buf.append(",authorities="); - buf.append(numAuthorities); - } - if (numAdditionals > 0) - { - buf.append(",additionals="); - buf.append(numAdditionals); - } - buf.append(",\nnames=" + names); - buf.append(",\nauthorativeAnswers=" + authorativeAnswers); - - buf.append("]"); - return buf.toString(); - } - -} |