OSPF_Area.c

/************************************************************************************
* Copyright (C) 2023                                                               *
* 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:    Shashi Kant Suman                                                     *
*                                                                                  *
* ---------------------------------------------------------------------------------*/
#include "main.h"
#include "OSPF_Typedef.h"
#include "OSPF.h"
#include "OSPF_List.h"
#include "OSPF_Interface.h"
#include "OSPF_Msg.h"
 
ptrOSPFAREA_DS OSPF_AREA_GET(ptrOSPF_PDS ospf,
                             NETSIM_ID in,
                             OSPFID areaId,
                             NETSIM_IPAddress interfaceIP)
{
    UINT i;
    for (i = 0; i < ospf->areaCount; i++)
    {
        if (areaId && !OSPFID_COMPARE(ospf->areaDS[i]->areaId, areaId))
            return ospf->areaDS[i];
        UINT j;
        for (j = 0; j < ospf->areaDS[i]->assocInterfaceCount; j++)
        {
            if (in && ospf->areaDS[i]->assocRouterInterfaceId[j] == in)
                return ospf->areaDS[i];
            if (interfaceIP && !IP_COMPARE(ospf->areaDS[i]->assocRouterInterface[j], interfaceIP))
                return ospf->areaDS[i];
        }
    }
    return NULL;
}
 
void OSPF_AREA_SET(ptrOSPF_PDS ospf,
                   ptrOSPFAREA_DS area)
{
    if (ospf->areaCount)
        ospf->areaDS = realloc(ospf->areaDS, (ospf->areaCount + 1)*(sizeof* ospf->areaDS));
    else
        ospf->areaDS = calloc(1, sizeof* ospf->areaDS);
    ospf->areaDS[ospf->areaCount] = area;
    ospf->areaCount++;
}
 
static void ADDR_RN_FREE(ptrADDR_RN rn)
{
    free(rn);
}
 
static void ospf_area_addressRange_init(NETSIM_ID d,
                                        ptrOSPFAREA_DS area)
{
    area->addressRangeList = ospf_list_init(ADDR_RN_FREE,NULL);
    NETSIM_ID i;
    for (i = 0; i < DEVICE(d)->nNumOfInterface; i++)
    {
        ptrADDR_RN rn = calloc(1, sizeof* rn);
        NetSIm_DEVICEINTERFACE* inter = DEVICE_INTERFACE(d, i + 1);
        rn->address = IP_NETWORK_ADDRESS(inter->szAddress,
                                         inter->szSubnetMask,
                                         inter->prefix_len);
        rn->mask = inter->szSubnetMask;
        rn->status = ADDRRNSTATUS_ADVERTISE;
        ospf_list_add_mem(area->addressRangeList, rn);
    }
}
 
static void add_interface_to_area(ptrOSPFAREA_DS area,
                                  NETSIM_ID d,
                                  NETSIM_ID in)
{
    if (area->assocInterfaceCount)
    {
        area->assocRouterInterface = realloc(area->assocRouterInterface,
            (area->assocInterfaceCount + 1)*
                                             (sizeof* area->assocRouterInterface));
 
        area->assocRouterInterfaceId = realloc(area->assocRouterInterfaceId,
            (area->assocInterfaceCount + 1)*
                                             (sizeof* area->assocRouterInterfaceId));
    }
    else
    {
        area->assocRouterInterface = calloc(1, sizeof* area->assocRouterInterface);
        area->assocRouterInterfaceId = calloc(1, sizeof* area->assocRouterInterfaceId);
    }
    area->assocRouterInterface[area->assocInterfaceCount] = DEVICE_NWADDRESS(d, in);
    area->assocRouterInterfaceId[area->assocInterfaceCount] = in;
    area->assocInterfaceCount++;
}
 
void ospf_area_init(NETSIM_ID d, NETSIM_ID in)
{
    ptrOSPF_PDS pds = OSPF_PDS_GET(d);
    ptrOSPF_IF ospf = OSPF_IF_GET(pds, in);
    ptrOSPFAREA_DS area = OSPF_AREA_GET_ID(pds, ospf->areaId);
    if (area)
    {
        add_interface_to_area(area, d, in);
        return;
    }
 
    area = calloc(1, sizeof* area);
    OSPF_AREA_SET(pds, area);
    area->areaId = ospf->areaId;
    add_interface_to_area(area, d, in);
    ospf_area_addressRange_init(d, area);
    area->extRoutingCapability = ospf->extRoutingCapability;
 
    area->nwLSAList = ospf_list_init(OSPF_LSA_MSG_FREE, OSPF_LSA_MSG_COPY);
    area->routerLSAList = ospf_list_init(OSPF_LSA_MSG_FREE, OSPF_LSA_MSG_COPY);
    area->routerSummaryLSAList = ospf_list_init(OSPF_LSA_MSG_FREE, OSPF_LSA_MSG_COPY);
    area->nwSummaryLSAList = ospf_list_init(OSPF_LSA_MSG_FREE, OSPF_LSA_MSG_COPY);
    area->maxAgeList = ospf_list_init(OSPF_LSA_MSG_FREE, OSPF_LSA_MSG_COPY);
}
 
void ospf_area_handleABRTask(ptrOSPF_PDS ospf)
{
    ospf;
    fnNetSimError("Implement %s after area implementation", __FUNCTION__);
}