KeepAliveManager.hxx

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#ifndef RESIP_KEEPALIVE_MANAGER_HXX
#define RESIP_KEEPALIVE_MANAGER_HXX
 
#include <map>
#include "resip/stack/Tuple.hxx"
 
namespace resip 
{
 
class KeepAliveTimeout;
class KeepAlivePongTimeout;
class DialogUsageManager;
 
class KeepAliveManager
{
   public:
      // Defaults to 10000ms (10s) as specified in RFC5626 section 4.4.1 
      static int mKeepAlivePongTimeoutMs;  // ?slg? move to Profile setting?
 
      struct NetworkAssociationInfo
      {
            int refCount;
            int keepAliveInterval;  // In seconds
            int id;
            bool supportsOutbound;
            bool pongReceivedForLastPing;
      };
 
      // .slg.  We track unique Network Associations per transport transport type, transport family, 
      //        target ip addr, target port, and source/transport flow key
      //        This means that if we have two different TCP connections to the same destination, 
      //        each originating from a different NIC, then we will send keepalives on each separately.
      //        For UDP, this is not currently the case, when the transport is bound to any interface
      //        (ie. 0.0.0.0), as the flow key will be same regardless of the source interface used to
      //        send the UDP message - fixing this for UDP remains an outstanding item.
      typedef std::map<Tuple, NetworkAssociationInfo, Tuple::FlowKeyCompare> NetworkAssociationMap;
 
      KeepAliveManager() : mCurrentId(0) {}
      virtual ~KeepAliveManager() {}
      void setDialogUsageManager(DialogUsageManager* dum) noexcept { mDum = dum; }
      virtual void add(const Tuple& target, int keepAliveInterval, bool targetSupportsOutbound);
      virtual void remove(const Tuple& target);
      virtual void process(KeepAliveTimeout& timeout);
      virtual void process(KeepAlivePongTimeout& timeout);
      virtual void receivedPong(const Tuple& flow);
 
   protected:
      DialogUsageManager* mDum;
      NetworkAssociationMap mNetworkAssociations;
      unsigned int mCurrentId;
};
 
}
 
 
#endif
 
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