keepalivemanager.cxx

这是国外的resip协议栈

#include "resip/stack/KeepAliveMessage.hxx"
#include "resip/dum/KeepAliveManager.hxx"
#include "resip/dum/KeepAliveTimeout.hxx"
#include "resip/dum/DialogUsageManager.hxx"
#include "rutil/Logger.hxx"
#include "resip/stack/SipStack.hxx"

#define RESIPROCATE_SUBSYSTEM Subsystem::DUM

using namespace resip;
using namespace std;

void KeepAliveManager::add(const Tuple& target, int keepAliveInterval)
{
   assert(mDum);
   NetworkAssociationMap::iterator it = mNetworkAssociations.find(target);
   if (it == mNetworkAssociations.end())
   {
      DebugLog( << "First keep alive for: " << target );
      DebugLog( << "Keepalive interval " << keepAliveInterval << " seconds" );
      DebugLog( << "Keepalive id " << mCurrentId );

      NetworkAssociationInfo info;
      info.refCount = 1;
      info.keepAliveInterval = keepAliveInterval;
      info.id = mCurrentId;
      mNetworkAssociations.insert(NetworkAssociationMap::value_type(target, info));
      KeepAliveTimeout t(target, mCurrentId);
      SipStack &stack = mDum->getSipStack();
      stack.post(t, keepAliveInterval, mDum);
      ++mCurrentId;
   }
   else
   {
      (*it).second.refCount++;
      if(keepAliveInterval < (*it).second.keepAliveInterval)
      {
          (*it).second.keepAliveInterval = keepAliveInterval;  // ?slg? only allow value to be shortened???  What if 2 different profiles with different keepAliveTime settings are sharing this network association?
      }
      DebugLog(<< "Association added for " << target);
   }
}

void KeepAliveManager::remove(const Tuple& target)
{
   NetworkAssociationMap::iterator it = mNetworkAssociations.find(target);
   if (it != mNetworkAssociations.end())
   {
      DebugLog(<< "Association removed for " << target);
      
      if (0 == --(*it).second.refCount)
      {
         DebugLog(<< "Keepalive " << it->second.id << " removed");
         DebugLog(<< "No more association for " << target);
         mNetworkAssociations.erase(target);
      }
   }
}

void KeepAliveManager::process(KeepAliveTimeout& timeout)
{
   assert(mDum);
   static KeepAliveMessage msg;
   NetworkAssociationMap::iterator it = mNetworkAssociations.find(timeout.target());
   if (it != mNetworkAssociations.end() && timeout.id() == it->second.id)
   {
      DebugLog( << "Refreshing keepalive for " << timeout.target() );
      DebugLog( << "Keepalive interval " << it->second.keepAliveInterval << " seconds");
      DebugLog( << "Keepalive id " << it->second.id << ")" );

      SipStack &stack = mDum->getSipStack();
      stack.sendTo(msg, timeout.target(), mDum);
      KeepAliveTimeout t(it->first, it->second.id);
      stack.post(t, it->second.keepAliveInterval, mDum);

   }
}

/* ====================================================================
 * 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.
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 * ====================================================================
 * 
 * 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/>.
 *
 */