OLSR_routingTable.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 "ZRP.h"
#include "ZRP_Enum.h"
 
int fn_NetSim_OLSR_UpdateRoutingTable()
{
    //Section 10
    NODE_OLSR* olsr=GetOLSRData(pstruEventDetails->nDeviceId);
    NETSIM_IPAddress subnet = STR_TO_IP4("255.255.255.255");
    OLSR_NEIGHBOR_SET* neighbor;
    OLSR_2HOP_NEIGHBOR_SET* two_hop_neighbor;
    OLSR_TOPOLOGY_INFORMATION_BASE* topology;
    if(!olsr->bRoutingTableUpdate)
    {
        return 0; //No update
    }
    //Condition 1
    olsrFlushroutingTable(olsr->ipWrapper,pstruEventDetails->nDeviceId);
    olsr->ipWrapper->table = NULL;
 
    //Condition 2
    neighbor=olsr->neighborSet;
    while(neighbor)
    {
        if(neighbor->N_status>=SYM_NEIGH)
        {
            NETSIM_ID interfaceId = 1;
            iptable_add(olsr->ipWrapper,
                        neighbor->N_neighbor_main_addr,
                        subnet,
                        0,
                        neighbor->N_neighbor_main_addr,
                        1,
                        &olsr->mainAddress,
                        &interfaceId,
                        1,
                        "OLSR");
 
        }
        neighbor=(OLSR_NEIGHBOR_SET*)LIST_NEXT(neighbor);
    }
 
    //Condition 3
    two_hop_neighbor=olsr->twoHopNeighborSet;
    while(two_hop_neighbor)
    {
        neighbor=olsrFindNeighborSet(olsr->neighborSet,two_hop_neighbor->N_2hop_addr);
        if(!neighbor && IP_COMPARE(two_hop_neighbor->N_2hop_addr,olsr->mainAddress))
        {
            neighbor=olsrFindNeighborSet(olsr->neighborSet,two_hop_neighbor->N_neighbor_main_addr);
            if(neighbor->N_willingness != WILL_NEVER && neighbor->N_status==MPR_NEIGH)
            {
                NETSIM_ID interfaceId = 1;
                iptable_add(olsr->ipWrapper,
                            two_hop_neighbor->N_2hop_addr,
                            subnet,
                            0,
                            two_hop_neighbor->N_neighbor_main_addr,
                            1,
                            &olsr->mainAddress,
                            &interfaceId,
                            2,
                            "OLSR");
            }
        }
        two_hop_neighbor=(OLSR_2HOP_NEIGHBOR_SET*)LIST_NEXT(two_hop_neighbor);
    }
 
    //Condition 3
    topology=olsr->topologyInfoBase;
    while(topology)
    {
        ptrIP_ROUTINGTABLE table=iptable_check((ptrIP_ROUTINGTABLE*)&olsr->ipWrapper->table,topology->T_dest_addr,subnet);
        if(!table && IP_COMPARE(topology->T_dest_addr,olsr->mainAddress))
        {
            table=iptable_check((ptrIP_ROUTINGTABLE*)&olsr->ipWrapper->table,topology->T_last_addr,subnet);
            if(table && table->Metric < olsr->nZoneRadius)
            {
                NETSIM_ID interfaceId = 1;
                iptable_add(olsr->ipWrapper,
                            topology->T_dest_addr,
                            subnet,
                            0,
                            table->gateway,
                            1,
                            &olsr->mainAddress,
                            &interfaceId,
                            table->Metric + 1,
                            "OLSR");
            /*  topology=olsr->topologyInfoBase;
                continue;*/
            }
        }
        topology=(OLSR_TOPOLOGY_INFORMATION_BASE*)LIST_NEXT(topology);
    }
    olsrUpdateIptable(olsr->ipWrapper->table,pstruEventDetails->nDeviceId);
    olsr->bRoutingTableUpdate=false;
    if(DEVICE_NWLAYER(pstruEventDetails->nDeviceId)->nRoutingProtocolId == NW_PROTOCOL_ZRP)
        fn_NetSim_BRP_Update(olsr->ipWrapper->table);
    return 0;
}
int olsrUpdateIptable(ptrIP_ROUTINGTABLE table,NETSIM_ID nNodeId)
{
    while(table)
    {
        iptable_add(IP_WRAPPER_GET(nNodeId),
                    table->networkDestination,
                    table->netMask,
                    table->prefix_len,
                    table->gateway,
                    1,
                    table->Interface,
                    table->nInterfaceId,
                    table->Metric,
                    "OLSR");
        
        table=(ptrIP_ROUTINGTABLE)LIST_NEXT(table);
    }
    return 0;
}
int olsrFlushroutingTable(ptrIP_WRAPPER wrapper,NETSIM_ID nNodeId)
{
    ptrIP_ROUTINGTABLE iptable = wrapper->table;
    while(iptable)
    {
        iptable_delete(IP_WRAPPER_GET(nNodeId), iptable->networkDestination, NULL,"OLSR");
        iptable_delete(wrapper, iptable->networkDestination, NULL,"OLSR");
        iptable = wrapper->table;
    }
    return 0;
}