ActiveMQ example source code file (DNSConstants.java)

This example ActiveMQ source code file (DNSConstants.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - ActiveMQ tags/keywords

address, dns, iana-reserved, key, mail, mail, name, recursion, rfc1035, rfc1035, rfc1183, rfc1183, rfc3755, rfc3755

The ActiveMQ DNSConstants.java source code

/**
 * Copyright 2003-2005 Arthur van Hoff, Rick Blair
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.activemq.jmdns;

/**
 * DNS constants.
 *
 * @version %I%, %G%
 * @author	Arthur van Hoff, Jeff Sonstein, Werner Randelshofer, Pierre Frisch, Rick Blair
 */
final class DNSConstants
{

    // changed to final class - jeffs
    final static String MDNS_GROUP = "224.0.0.251";
    final static String MDNS_GROUP_IPV6 = "FF02::FB";
    final static int MDNS_PORT = 5353;
    final static int DNS_PORT = 53;
    final static int DNS_TTL = 60 * 60;	// default one hour TTL
    // final static int DNS_TTL		    = 120 * 60;	// two hour TTL (draft-cheshire-dnsext-multicastdns.txt ch 13)
    
    final static int MAX_MSG_TYPICAL = 1460;
    final static int MAX_MSG_ABSOLUTE = 8972;

    final static int FLAGS_QR_MASK = 0x8000;	// Query response mask
    final static int FLAGS_QR_QUERY = 0x0000;	// Query
    final static int FLAGS_QR_RESPONSE = 0x8000;	// Response

    final static int FLAGS_AA = 0x0400;	// Authorative answer
    final static int FLAGS_TC = 0x0200;	// Truncated
    final static int FLAGS_RD = 0x0100;	// Recursion desired
    final static int FLAGS_RA = 0x8000;	// Recursion available

    final static int FLAGS_Z = 0x0040;	// Zero
    final static int FLAGS_AD = 0x0020;	// Authentic data
    final static int FLAGS_CD = 0x0010;	// Checking disabled

    final static int CLASS_IN = 1;		// Final Static Internet
    final static int CLASS_CS = 2;		// CSNET
    final static int CLASS_CH = 3;		// CHAOS
    final static int CLASS_HS = 4;		// Hesiod
    final static int CLASS_NONE = 254;		// Used in DNS UPDATE [RFC 2136]
    final static int CLASS_ANY = 255;		// Not a DNS class, but a DNS query class, meaning "all classes"
    final static int CLASS_MASK = 0x7FFF;	// Multicast DNS uses the bottom 15 bits to identify the record class...
    final static int CLASS_UNIQUE = 0x8000;	// ... and the top bit indicates that all other cached records are now invalid

    final static int TYPE_IGNORE = 0;		// This is a hack to stop further processing
    final static int TYPE_A = 1; 		// Address
    final static int TYPE_NS = 2;		// Name Server
    final static int TYPE_MD = 3;		// Mail Destination
    final static int TYPE_MF = 4;		// Mail Forwarder
    final static int TYPE_CNAME = 5;		// Canonical Name
    final static int TYPE_SOA = 6;		// Start of Authority
    final static int TYPE_MB = 7;		// Mailbox
    final static int TYPE_MG = 8;		// Mail Group
    final static int TYPE_MR = 9;		// Mail Rename
    final static int TYPE_NULL = 10;		// NULL RR
    final static int TYPE_WKS = 11;		// Well-known-service
    final static int TYPE_PTR = 12;		// Domain Name pofinal static inter
    final static int TYPE_HINFO = 13;		// Host information
    final static int TYPE_MINFO = 14;		// Mailbox information
    final static int TYPE_MX = 15;		// Mail exchanger
    final static int TYPE_TXT = 16;		// Arbitrary text string
    final static int TYPE_RP = 17; 		// for Responsible Person                 [RFC1183]
    final static int TYPE_AFSDB = 18; 		// for AFS Data Base location             [RFC1183]
    final static int TYPE_X25 = 19; 		// for X.25 PSDN address                  [RFC1183]
    final static int TYPE_ISDN = 20; 		// for ISDN address                       [RFC1183]
    final static int TYPE_RT = 21; 		// for Route Through                      [RFC1183]
    final static int TYPE_NSAP = 22; 		// for NSAP address, NSAP style A record  [RFC1706]
    final static int TYPE_NSAP_PTR = 23;		//
    final static int TYPE_SIG = 24; 		// for security signature                 [RFC2931]
    final static int TYPE_KEY = 25; 		// for security key                       [RFC2535]
    final static int TYPE_PX = 26; 		// X.400 mail mapping information         [RFC2163]
    final static int TYPE_GPOS = 27; 		// Geographical Position                  [RFC1712]
    final static int TYPE_AAAA = 28; 		// IP6 Address                            [Thomson]
    final static int TYPE_LOC = 29; 		// Location Information                   [Vixie]
    final static int TYPE_NXT = 30; 		// Next Domain - OBSOLETE                 [RFC2535, RFC3755]
    final static int TYPE_EID = 31; 		// Endpoint Identifier                    [Patton]
    final static int TYPE_NIMLOC = 32; 		// Nimrod Locator                         [Patton]
    final static int TYPE_SRV = 33; 		// Server Selection                       [RFC2782]
    final static int TYPE_ATMA = 34; 		// ATM Address                            [Dobrowski]
    final static int TYPE_NAPTR = 35; 		// Naming Authority Pointer               [RFC2168, RFC2915]
    final static int TYPE_KX = 36; 		// Key Exchanger                          [RFC2230]
    final static int TYPE_CERT = 37; 		// CERT                                   [RFC2538]
    final static int TYPE_A6 = 38; 		// A6                                     [RFC2874]
    final static int TYPE_DNAME = 39; 		// DNAME                                  [RFC2672]
    final static int TYPE_SINK = 40; 		// SINK                                   [Eastlake]
    final static int TYPE_OPT = 41; 		// OPT                                    [RFC2671]
    final static int TYPE_APL = 42; 		// APL                                    [RFC3123]
    final static int TYPE_DS = 43; 		// Delegation Signer                      [RFC3658]
    final static int TYPE_SSHFP = 44; 		// SSH Key Fingerprint                    [RFC-ietf-secsh-dns-05.txt]
    final static int TYPE_RRSIG = 46; 		// RRSIG                                  [RFC3755]
    final static int TYPE_NSEC = 47; 		// NSEC                                   [RFC3755]
    final static int TYPE_DNSKEY = 48;		// DNSKEY                                 [RFC3755]
    final static int TYPE_UINFO = 100;      //									      [IANA-Reserved]
    final static int TYPE_UID = 101;      //                                        [IANA-Reserved]
    final static int TYPE_GID = 102;      //                                        [IANA-Reserved]
    final static int TYPE_UNSPEC = 103;      //                                        [IANA-Reserved]
    final static int TYPE_TKEY = 249; 		// Transaction Key                        [RFC2930]
    final static int TYPE_TSIG = 250; 		// Transaction Signature                  [RFC2845]
    final static int TYPE_IXFR = 251; 		// Incremental transfer                   [RFC1995]
    final static int TYPE_AXFR = 252;		// Transfer of an entire zone             [RFC1035]
    final static int TYPE_MAILA = 253;		// Mailbox-related records (MB, MG or MR) [RFC1035]
    final static int TYPE_MAILB = 254;		// Mail agent RRs (Obsolete - see MX)     [RFC1035]
    final static int TYPE_ANY = 255;		// Request for all records	        	  [RFC1035]
    
    //Time Intervals for various functions
    
    final static int SHARED_QUERY_TIME = 20;            //milliseconds before send shared query
    final static int QUERY_WAIT_INTERVAL = 225;           //milliseconds between query loops.
    final static int PROBE_WAIT_INTERVAL = 250;           //milliseconds between probe loops.
    final static int RESPONSE_MIN_WAIT_INTERVAL = 20;            //minimal wait interval for response.
    final static int RESPONSE_MAX_WAIT_INTERVAL = 115;           //maximal wait interval for response
    final static int PROBE_CONFLICT_INTERVAL = 1000;          //milliseconds to wait after conflict.
    final static int PROBE_THROTTLE_COUNT = 10;            //After x tries go 1 time a sec. on probes.
    final static int PROBE_THROTTLE_COUNT_INTERVAL = 5000;          //We only increment the throttle count, if
    // the previous increment is inside this interval.
    final static int ANNOUNCE_WAIT_INTERVAL = 1000;          //milliseconds between Announce loops.
    final static int RECORD_REAPER_INTERVAL = 10000;         //milliseconds between cache cleanups.
    final static int KNOWN_ANSWER_TTL = 120;
    final static int ANNOUNCED_RENEWAL_TTL_INTERVAL = DNS_TTL * 500; // 50% of the TTL in milliseconds
}