DialogSetId.cxx

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#include "DialogSetId.hxx"
#include "resip/stack/SipMessage.hxx"
#include "resip/stack/Helper.hxx"
#include "rutil/Logger.hxx"
 
#define RESIPROCATE_SUBSYSTEM Subsystem::DUM
 
using namespace resip;
 
const DialogSetId DialogSetId::Empty;
 
DialogSetId::DialogSetId(const SipMessage& msg) : 
   mCallId(msg.header(h_CallID).value())
{
   //find local tag, generate one as necessary
   if (msg.isExternal())
   {
      if(msg.isResponse())
      {        
         if(msg.header(h_From).exists(p_tag))
         {
            // .bwc. If no tag, leave mTag empty.
            mTag = msg.header(h_From).param(p_tag);
         }
      }
      else //external request; generate to tag if not present
      {
         if (msg.header(h_To).exists(p_tag))
         {
            mTag = msg.header(h_To).param(p_tag);
         }
         else
         {
            //DebugLog ( <<  "********** Generated Local Tag *********** " );            
            mTag = Helper::computeTag(Helper::tagSize);
         }
      }
   }
   else
   {
      if(msg.isRequest())
      {
         resip_assert(msg.header(h_From).exists(p_tag));
         mTag = msg.header(h_From).param(p_tag);
      }
      else
      {
         resip_assert(msg.header(h_To).exists(p_tag));
         mTag = msg.header(h_To).param(p_tag);
      }
   }
}
 
DialogSetId::DialogSetId(const Data& callId, const Data& tag)
   : mCallId(callId),
     mTag(tag)
{
}
 
DialogSetId::DialogSetId() 
   : mCallId(),
     mTag()
{
}
 
bool
DialogSetId::operator==(const DialogSetId& rhs) const
{
   return mCallId == rhs.mCallId && mTag == rhs.mTag;
}
 
bool
DialogSetId::operator!=(const DialogSetId& rhs) const
{
   return mCallId != rhs.mCallId || mTag != rhs.mTag;
}
 
bool
DialogSetId::operator<(const DialogSetId& rhs) const
{
   if (mCallId < rhs.mCallId)
   {
      return true;
   }
   if (mCallId > rhs.mCallId)
   {
      return false;
   }
   return mTag < rhs.mTag;
}
 
bool 
DialogSetId::operator>(const DialogSetId& rhs) const
{
   if (mCallId > rhs.mCallId)
   {
      return true;
   }
   if (mCallId < rhs.mCallId)
   {
      return false;
   }
   return mTag > rhs.mTag;
}
 
size_t DialogSetId::hash() const
{
    // Call-IDs and tags are chosen by remote peers.  With fixed hashes a sender
    // could make every dialog set collide in DUM's DialogSetMap, so that each
    // new request scans all of them; keyed hashes prevent that (see
    // KeyedDataHash).  hashCombine rather than XOR, which would cancel out
    // when Call-ID == tag.
    return hashCombine(mCallId.keyedHash(), mTag.keyedHash());
}
 
 
EncodeStream&
resip::operator<<(EncodeStream& os, const DialogSetId& id)
{
    return os << id.mCallId << '-' << id.mTag ;
}
 
HashValueImp(resip::DialogSetId, data.hash());
 
/* ====================================================================
 * The Vovida Software License, Version 1.0 
 * 
 * Copyright (c) 2026 SIP Spectrum, Inc. https://www.sipspectrum.com
 * 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
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 *    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
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 * ====================================================================
 * 
 * This software consists of voluntary contributions made by Vovida
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