static_routing.pc

无线网络仿真工具Glomosim2.03

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 * understandings with respect to the copyrighted software:
 *
 * 1.Permission to use, copy, and modify this software and its documentation
 *   for education and non-commercial research purposes only is hereby granted
 *   to Licensee, provided that the copyright notice, the original author's
 *   names and unit identification, and this permission notice appear on all
 *   such copies, and that no charge be made for such copies. Any entity
 *   desiring permission to use this software for any commercial or
 *   non-educational research purposes should contact: 
 *
 *   Professor Rajive Bagrodia 
 *   University of California, Los Angeles 
 *   Department of Computer Science 
 *   Box 951596 
 *   3532 Boelter Hall 
 *   Los Angeles, CA 90095-1596 
 *   [e-mail]
 *
 * 2.NO REPRESENTATIONS ARE MADE ABOUT THE SUITABILITY OF THE SOFTWARE FOR ANY
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 */

// Use the latest version of Parsec if this line causes a compiler error.
/* 
 * $Id: static_routing.pc,v 1.7 2000/09/21 19:49:26 mineo Exp $
 *
 * NAME:            static_routing.pc.
 *
 * WRITTEN BY:      Ken Tang.
 *
 * PURPOSE:         Static routing.
 */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <math.h>

#include "main.h"
#include "api.h"
#include "structmsg.h"
#include "fileio.h"
#include "message.h"
#include "network.h"
#include "nwcommon.h"

#include "static_routing.h"
#include "../mac/wiredlink.h"

/*
 * NAME:        RoutingStaticInit.
 *
 * PURPOSE:     Handling all initializations needed by static routing.
 *
 * PARAMETERS:  node, node doing the initialization.
 *              nodeInput, input from configuration file.
 *
 * RETURN:      None.
 *
 * ASSUMPTION:  None.
 */

void RoutingStaticInit(GlomoNode *node, const GlomoNodeInput *nodeInput) {
    int i, j;
    GlomoNodeInput routeInput;
    char buf[GLOMO_MAX_STRING_LENGTH];
    char routeStr[GLOMO_MAX_STRING_LENGTH];
    BOOL retVal;

    NetworkEmptyForwardingTable(node);

    retVal = GLOMO_ReadCachedFile(nodeInput, "STATIC-ROUTE-FILE", &routeInput);

    if (retVal == FALSE) {
        printf("RoutingStatic: Static routing needs STATIC-ROUTE-FILE.\n");
        assert(FALSE); abort();
    }

    for (i = 0; i < routeInput.numLines; i++) {
        NODE_ADDR sourceAddr, destAddr, nextHop;
        InterfaceIdType interfaceId;
        int numParameters;

        numParameters = sscanf(routeInput.inputStrings[i], "%u %u %u %u", 
                               &sourceAddr, &destAddr, &nextHop, &interfaceId);

        assert(numParameters == 3 || numParameters == 4);

        if (node->nodeAddr == sourceAddr) {
            if (numParameters == 3) {
                int wiredInterfaceId
                    = WiredLinkInterfaceIdForThisDest(node, nextHop);

                if (wiredInterfaceId != -1) {
                    interfaceId = wiredInterfaceId;
                }
                else {
                    interfaceId = DEFAULT_INTERFACE;
                }
            }
            else {
                assert((interfaceId < node->numberRadios) ||
                       (WiredLinkInterfaceIdForThisDest(node, nextHop)
                        == interfaceId));
            }

            NetworkUpdateForwardingTable(node, destAddr, interfaceId, nextHop);
        }//if//
    }
}




/*
 * NAME:        RoutingStaticLayer.
 *
 * PURPOSE:     Handles all messages sent to network layer.
 *
 * PARAMETERS:  node, node receiving message.
 *              msg, message for node to interpret.
 *
 * RETURN:      None.
 *
 * ASSUMPTION:  None.
 */

void RoutingStaticLayer(GlomoNode *node, const Message *msg)
{
    char clockStr[GLOMO_MAX_STRING_LENGTH];
    ctoa(simclock(), clockStr);
    printf("RoutingStatic: Got unknown event type %d\n", msg->eventType);
    assert(FALSE);
}



/*
 * NAME:        RoutingStaticFinalize.
 *
 * PURPOSE:     Handling all finalization needed by static routing.
 *
 * PARAMETERS:  node, node doing the finalization.
 *
 * RETURN:      None.
 *
 * ASSUMPTION:  None.
 */

void RoutingStaticFinalize(GlomoNode *node)
{
}