dnsinterface.cxx

这是国外的resip协议栈

#if defined(HAVE_CONFIG_H)
#include "resip/stack/config.hxx"
#endif

#ifndef WIN32
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#ifndef __CYGWIN__
#  include <netinet/in.h>
#  include <arpa/nameser.h>
#  include <resolv.h>
#endif
#endif




#if defined(USE_ARES)
#include "ares.h"
#include "ares_dns.h"
#endif

#include "rutil/compat.hxx"
#include "rutil/Logger.hxx"
#include "rutil/BaseException.hxx"
#include "rutil/Socket.hxx"

#include "rutil/dns/DnsStub.hxx"
#include "rutil/dns/RRVip.hxx"
#include "resip/stack/DnsInterface.hxx"
#include "rutil/dns/DnsHandler.hxx"
#include "resip/stack/DnsResult.hxx"

//#include "rutil/dns/ExternalDnsFactory.hxx"
#include "rutil/WinLeakCheck.hxx"


using namespace resip;

#define RESIPROCATE_SUBSYSTEM resip::Subsystem::DNS

DnsInterface::DnsInterface(DnsStub& dnsStub) : 
   //mDnsProvider(ExternalDnsFactory::createExternalDns()),
   mActiveQueryCount(0),
   mDnsStub(dnsStub)
{

#ifdef USE_DNS_VIP
   mDnsStub.setResultTransform(&mVip);
#endif
}

DnsInterface::~DnsInterface()
{
}

void 
DnsInterface::addTransportType(TransportType type, IpVersion version)
{
   static Data Udp("SIP+D2U");
   static Data Tcp("SIP+D2T");
   static Data Tls("SIPS+D2T");
   static Data Dtls("SIPS+D2U");

   mSupportedTransports.push_back(std::make_pair(type, version));
   switch (type)
   {
      case UDP:
         mSupportedNaptrs.insert(Udp);
         break;
      case TCP:
         mSupportedNaptrs.insert(Tcp);
         break;
      case TLS:
         mSupportedNaptrs.insert(Tls);
         break;
      case DTLS:
         mSupportedNaptrs.insert(Dtls);
         break;         
      default:
         assert(0);
         break;
   }
}

bool
DnsInterface::isSupported(const Data& service)
{
   return mSupportedNaptrs.count(service) != 0;
}

bool
DnsInterface::isSupported(TransportType t, IpVersion version)
{
   return std::find(mSupportedTransports.begin(), mSupportedTransports.end(), std::make_pair(t, version)) != mSupportedTransports.end();
}

bool
DnsInterface::isSupportedProtocol(TransportType t)
{
   for (TransportMap::const_iterator i=mSupportedTransports.begin(); i != mSupportedTransports.end(); ++i)
   {
      if (i->first == t)
      {
         return true;
      }
   }
   return false;
}

int DnsInterface::supportedProtocols()
{
   return mSupportedTransports.size();
}

bool 
DnsInterface::requiresProcess()
{
   return mActiveQueryCount>0;
}

void 
DnsInterface::buildFdSet(FdSet& fdset)
{
   //mDnsProvider->buildFdSet(fdset.read, fdset.write, fdset.size);
   //mDnsStub->buildFdSet(fdset);
}

void 
DnsInterface::process(FdSet& fdset)
{
   //mDnsStub->process(fdset);
   //mDnsProvider->process(fdset.read, fdset.write);
}


DnsResult*
DnsInterface::createDnsResult(DnsHandler* handler)
{
   DnsResult* result = new DnsResult(*this, mDnsStub, mVip, handler);
   mActiveQueryCount++;  
   return result;
}

void 
DnsInterface::lookup(DnsResult* res, const Uri& uri)
{
   res->lookup(uri, mDnsStub.getEnumSuffixes());   
}

// DnsResult* 
// DnsInterface::lookup(const Via& via, DnsHandler* handler)
// {
//    assert(0);

//    //DnsResult* result = new DnsResult(*this);
//    return NULL;
// }

//?dcm? -- why is this here?
DnsHandler::~DnsHandler()
{
}

/* moved to DnsStub.
void 
DnsInterface::lookupRecords(const Data& target, unsigned short type, DnsRawSink* sink)
{
   mDnsProvider->lookup(target.c_str(), type, this, sink);
}

void 
DnsInterface::handleDnsRaw(ExternalDnsRawResult res)
{
   reinterpret_cast<DnsRawSink*>(res.userData)->onDnsRaw(res.errorCode(), res.abuf, res.alen);
   mDnsProvider->freeResult(res);
}
*/

//  Copyright (c) 2003, Jason Fischl 
/* ====================================================================
 * 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 [e-mail].
 *
 * 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/>.
 *
 */