GarbageCollectionTimer.c

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/************************************************************************************
* Copyright (C) 2020     
*
* TETCOS, Bangalore. India                                                         *
 
* Tetcos owns the intellectual property rights in the Product and its content.     *
* The copying, redistribution, reselling or publication of any or all of the       *
* Product or its content without express prior written consent of Tetcos is        *
* prohibited. Ownership and / or any other right relating to the software and all  *
* intellectual property rights therein shall remain at all times with Tetcos.      *
 
* Author:  Thangarasu.K                                                       *
* ---------------------------------------------------------------------------------*/
#ifndef _CRT_SECURE_NO_DEPRECATE
#define _CRT_SECURE_NO_DEPRECATE
#endif
#include "main.h"
#include "Routing.h"
/**
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
    Until the garbage-collection timer expires, the route is included in all 
    updates sent by the router. When the garbage collection timer expires, the route is deleted 
    from the routing table  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */
int fn_NetSim_RIP_Garbage_Collection_Timer(struct stru_NetSim_Network *pstruNETWORK,NetSim_EVENTDETAILS *pstruEventDetails)
{
    RIP_ROUTING_DATABASE *pstruTmpHeadEntry;
    RIP_ROUTING_DATABASE *pstruTempTableList;
    RIP_ROUTING_DATABASE *pstruNewTable;
 
    NETWORK=pstruNETWORK;
    pstruTmpHeadEntry=NETWORK->ppstruDeviceList[pstruEventDetails->nDeviceId-1]->pstruNetworkLayer->RoutingVar;
    pstruTempTableList=pstruTmpHeadEntry;
 
    while(pstruTempTableList)
    {
        //check whether the entry is invalid or not if the entry is invalid remove that entry
        if(pstruTempTableList->nMetric==EXPIRED_ROUTE)
        {
            pstruNewTable = pstruTempTableList;
            pstruTempTableList=pstruTempTableList->pstru_Router_NextEntry;
            pstruNewTable->pstru_Router_NextEntry = NULL;
 
            if(NETWORK->ppstruDeviceList[pstruEventDetails->nDeviceId-1]->pstruNetworkLayer->RoutingVar == pstruNewTable)
                NETWORK->ppstruDeviceList[pstruEventDetails->nDeviceId-1]->pstruNetworkLayer->RoutingVar = pstruTempTableList;
 
            if(pstruNewTable->szAddress)
                IP_FREE(pstruNewTable->szAddress);
 
            if(pstruNewTable->szRouter)
                IP_FREE(pstruNewTable->szRouter);
 
            fnpFreeMemory(pstruNewTable);
        }
        else
            pstruTempTableList=pstruTempTableList->pstru_Router_NextEntry;
    }
    return 1;
}