DnsSrvRecord.cxx

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#if defined(HAVE_CONFIG_H)
#include "config.h"
#endif
 
#include <stdlib.h>
 
#include "AresCompat.hxx"
 
#ifndef __CYGWIN__
#ifndef RRFIXEDSZ
#define RRFIXEDSZ 10
#endif
#ifndef NS_RRFIXEDSZ
#define NS_RRFIXEDSZ 10
#endif
#endif
 
#include "rutil/Data.hxx"
#include "rutil/BaseException.hxx"
#include "RROverlay.hxx"
#include "DnsResourceRecord.hxx"
#include "DnsSrvRecord.hxx"
 
using namespace resip;
 
DnsSrvRecord::DnsSrvRecord(const RROverlay& overlay)
{
   char* name = 0;
   long len = 0;
   if (ARES_SUCCESS != ares_expand_name(overlay.data()-overlay.nameLength()-RRFIXEDSZ, overlay.msg(), overlay.msgLength(), &name, &len))
   {
      throw SrvException("Failed parse of SRV record", __FILE__, __LINE__);
   }
   mName = name;
   free(name);
   mTTL = overlay.ttl();
 
   // priority, weight and port, followed by at least one byte of target
   if (overlay.dataLength() < 7)
   {
      throw SrvException("Failed parse of SRV record", __FILE__, __LINE__);
   }
 
   mPriority = DNS__16BIT(overlay.data());
   mWeight = DNS__16BIT(overlay.data() + 2);
   mPort = DNS__16BIT(overlay.data() + 4);
 
   if (ARES_SUCCESS != ares_expand_name(overlay.data() + 6, overlay.msg(), overlay.msgLength(), &name, &len))
   {
      throw SrvException("Failed parse of SRV record", __FILE__, __LINE__);
   }
   mTarget = name;
   free(name);
 
   // ares_expand_name stops at the end of the message, not the record
   if (6 + len > overlay.dataLength())
   {
      throw SrvException("Failed parse of SRV record", __FILE__, __LINE__);
   }
}
 
bool DnsSrvRecord::isSameValue(const Data& value) const
{
   return value == (mTarget + ":" + Data(mPort));
}
 
EncodeStream&
DnsSrvRecord::dump(EncodeStream& strm) const
{
   strm << mName << " (SRV) --> p=" << mPriority << " w=" << mWeight << " " << mTarget << ":" << mPort << " ttl=" << mTTL;
   return strm;
}
 
/* ====================================================================
 * The Vovida Software License, Version 1.0 
 * 
 * Copyright (c) 2000-2005 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 $1,000, 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/>.
 *
 */