DnsRecord.hxx
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上传日期:2013-07-25
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- #ifndef DnsRecord_HXX
- #define DnsRecord_HXX
- /* ====================================================================
- * The Vovida Software License, Version 1.0
- *
- * Copyright (c) 2000 Vovida Networks, Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. 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.
- *
- * 3. The names "VOCAL", "Vovida Open Communication Application Library",
- * and "Vovida Open Communication Application Library (VOCAL)" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact vocal@vovida.org.
- *
- * 4. Products derived from this software may not be called "VOCAL", nor
- * may "VOCAL" appear in their name, without prior written
- * permission of Vovida Networks, Inc.
- *
- * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
- * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL VOVIDA
- * NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES
- * IN EXCESS OF ,000, NOR FOR ANY 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.
- *
- * ====================================================================
- *
- * This software consists of voluntary contributions made by Vovida
- * Networks, Inc. and many individuals on behalf of Vovida Networks,
- * Inc. For more information on Vovida Networks, Inc., please see
- * <http://www.vovida.org/>.
- *
- */
- static const char* const DnsRecord_hxx_Version =
- "$Id: DnsRecord.hxx,v 1.1 2001/03/27 23:51:38 wbreu Exp $";
- /*
- *
- */
- #include <stdlib.h>
- #include <stdio.h>
- #include <sys/types.h>
- #include <string>
- #include "cpLog.h"
- /** simple 5-tuple DNS SRV/A record:
- * priority and weight do no apply to A record
- */
- class DnsRecord {
- public:
- /// constructor:
- DnsRecord(): myQtype(0), myPriority(0), myWeight(0),
- myPort(0), myTarget(""), myAddress("")
- {
- #if 0
- // the following was used for debugging
- myTimesSelected[0] = myTimesSelected[1] =
- myTimesSelected[2] = myTimesSelected[3] = 0;
- #endif
- }
- // copy constructor
- DnsRecord( const DnsRecord& rhs );
- // assignment operator
- DnsRecord& operator=( const DnsRecord& rhs );
- /// destructor:
- virtual ~DnsRecord()
- {
- cpLog( LOG_DEBUG, "~DnsRecord() invoked" );
- }
- /// accessors:
- int getQtype() const { return myQtype; }
- ///
- int getPriority() const { return myPriority; }
- ///
- int getWeight() const { return myWeight; }
- ///
- int getPort() const { return myPort; }
- ///
- const char* getTarget() const { return myTarget.c_str(); }
- ///
- const char* getAddress() const { return myAddress.c_str(); }
-
- /// mutators:
- void setQtype( int qt ) { myQtype = qt; }
- ///
- void setPriority( int prio ) { myPriority = prio; }
- ///
- void setWeight( int wt ) { myWeight = wt; }
- ///
- void setPort( int prt ) { myPort = prt; }
- ///
- void setTarget( const string& name ) { myTarget.assign( name ); }
- ///
- void setAddress( const string& addr ){ myAddress.assign( addr ); }
- /// to display content of this record:
- void printRecord( ) {
- cpLog( LOG_DEBUG,
- "t=%3d p=%3d w=%4d port=%5d target=%s addr=%sn",
- myQtype, myPriority, myWeight, myPort, myTarget.c_str(),
- myAddress.c_str());
- }
- /// increment myTimesSelected[ place ]
- void incrTimesSelected( int idx )
- {
- #if 0
- myTimesSelected[idx]++;
- #endif
- }
- /// clear myTimesSelected[]
- void clearTimesSelected( )
- {
- #if 0
- myTimesSelected[0] = myTimesSelected[1] =
- myTimesSelected[2] = myTimesSelected[3] = 0;
- #endif
- }
-
- /// to verifiy the load balancing algorithm works for SRV records
- void printTally( ) {
- #if 0
- int sum = myTimesSelected[1]+myTimesSelected[2]+myTimesSelected[3];
- cpLog( LOG_DEBUG,
- "p=%3d w=%4d 1st=%4d 2nd=%4d 3rd=%4d sum=%4d t=%sn",
- myPriority, myWeight, myTimesSelected[1], myTimesSelected[2],
- myTimesSelected[3], sum, myTarget.c_str());
- #endif
- }
- private:
- /// equality operator - suppressed
- bool operator==( const DnsRecord& rhs );
- int myQtype; // SRV or A record type
- int myPriority; // appl. to SRV record only
- int myWeight; // appl. to SRV record only
- int myPort; // appl. to SRV record only
- string myTarget; // server or host name: "xxx.yy.com"
- string myAddress; // "a.b.c.d" notation
- #if 0
- /** for debug only:
- * used by printTally()
- */
- int myTimesSelected[4]; // # myTimes this record gets picked first,
- // second or third (0 not used)
- #endif
- };
- #endif