[Tinyos-help] really confuzed about a comment in the file MultiHopEngineM.nc of tinyos1.x

[Renee Azhen]

dear all:
  I am reading the file MultiHopEngineM.nc,
  in function mForward, there is a comment:     
  // Failures at the send level do not cause the seq. number space to be 
// rolled back properly.  This is somewhat broken.
  I am really confuzed about this and could anyone help me to make it clear??
  or How to contact the author who write this file?
  thanks
  Sam
   
   
    static TOS_MsgPtr mForward(TOS_MsgPtr pMsg, uint8_t id) {
    TOS_MsgPtr pNewBuf = pMsg;
    
    if (((iFwdBufHead + 1) % FWD_QUEUE_SIZE) == iFwdBufTail) 
      return pNewBuf;
    
    if ((call RouteSelect.selectRoute(pMsg,id)) != SUCCESS) 
      return pNewBuf;
 
  // I am Confuzed here:
    // Failures at the send level do not cause the seq. number space to be 
    // rolled back properly.  This is somewhat broken.
    if (call SendMsg.send[id](pMsg->addr,pMsg->length,pMsg) == SUCCESS) {
      pNewBuf = FwdBufList[iFwdBufHead];
      FwdBufList[iFwdBufHead] = pMsg;
      iFwdBufHead++; iFwdBufHead %= FWD_QUEUE_SIZE;
    }
    return pNewBuf; 
  }



       
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