nstelnet_client.pc

无线网络仿真工具Glomosim2.03

/*
 * GloMoSim is COPYRIGHTED software.  Release 2.02 of GloMoSim is available 
 * at no cost to educational users only.
 *
 * Commercial use of this software requires a separate license.  No cost,
 * evaluation licenses are available for such purposes; please contact
 * [e-mail]
 *
 * By obtaining copies of this and any other files that comprise GloMoSim2.02,
 * you, the Licensee, agree to abide by the following conditions and
 * 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
 *   PURPOSE. IT IS PROVIDED "AS IS" WITHOUT EXPRESS OR IMPLIED WARRANTY.
 *
 * 3.Neither the software developers, the Parallel Computing Lab, UCLA, or any
 *   affiliate of the UC system shall be liable for any damages suffered by
 *   Licensee from the use of this software.
 */

// Use the latest version of Parsec if this line causes a compiler error.
/*
 * $Id: nstelnet_client.pc,v 1.3 2001/02/15 03:17:26 mineo Exp $
 *
 * This file contains initialization function, message processing
 * function, and finalize function used by nstelnet client. 
 */

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

#include "api.h"
#include "structmsg.h"
#include "fileio.h"
#include "message.h"

#include "application.h"
#include "app_util.h"
#include "nstelnet_client.h"
#include "tcp.h"
#include "tcpapps.h"

#define noDEBUG

static GlomoAppNstelnetClient *
getNstelnetClient(GlomoNode *nodePtr, int connId);

static GlomoAppNstelnetClient *
newNstelnetClient(GlomoNode *nodePtr, int connId);

static clocktype
nstelnetPktInterval(GlomoNode *nodePtr);

/*
 * NAME:        AppLayerNstelnetClient.
 * PURPOSE:     Models the behaviour of Nstelnet Client on receiving the
 *              message encapsulated in msg.
 * PARAMETERS:  nodePtr - pointer to the node which received the message.
 *              msg - message received by the layer
 * RETURN:      none.
 */
void 
AppLayerNstelnetClient(GlomoNode *nodePtr, Message *msg)
{
    char buf[GLOMO_MAX_STRING_LENGTH];

    ctoa(simclock(), buf);
    switch(msg->eventType) {  
    case MSG_APP_SetupConnection:
    {
        newNstelnetClient(nodePtr, *((int *)msg->info));
        GLOMO_MsgFree(nodePtr, msg);
        break;
    }
    case MSG_APP_NextPkt:
    {
        char payload[10];
        GlomoAppNstelnetClient *clientPtr;

        clientPtr = getNstelnetClient(nodePtr, *((int *)msg->info));
        if (simclock() <  clientPtr->sessionFinish) {
            appSendData(nodePtr, TRANSPORT_PROTOCOL_TCP, *((int *)msg->info), 
                        payload, 10);
            GLOMO_MsgSend(nodePtr, msg, nstelnetPktInterval(nodePtr));
        }
        else {
            clientPtr->sessionIsClosed = TRUE;
            GLOMO_MsgFree(nodePtr, msg);
        }
        break;
    }
    default:
        ctoa(simclock(), buf);
        fprintf(stderr, "Time %s: Node %u received message of unknown type"
                " %ld.\n", buf, nodePtr->nodeAddr, msg->eventType);
        GLOMO_MsgFree(nodePtr, msg);
        assert(FALSE);
    } /* end of switch */
}

/*
 * NAME:        AppNstelnetClientInit. 
 * PURPOSE:     Initialize a Nstelnet session. 
 * PARAMETERS:  nodePtr - pointer to the node, 
 *              serverAddr - address of the server,
 *              waitTime - time until the session starts.
 * RETURN:      none. 
 */
void
AppNstelnetClientInit(GlomoNode *nodePtr, 
                    short localPort, NODE_ADDR remoteAddr, short remotePort,
                    int connectionId, clocktype waitTime)
{
    AppToTcpConnSetup *connSetup;
    Message *msg;

    msg = GLOMO_MsgAlloc(nodePtr, GLOMO_TRANSPORT_LAYER,
                         TRANSPORT_PROTOCOL_TCP, MSG_TCP_SetupConnection);
    GLOMO_MsgInfoAlloc(nodePtr, msg, sizeof(AppToTcpConnSetup));
    
    connSetup = (AppToTcpConnSetup *) msg->info;
    
    connSetup->agentType = 0;/* Source */
    connSetup->localAddr = nodePtr->nodeAddr;
    connSetup->localPort = localPort;
    connSetup->remoteAddr = remoteAddr;
    connSetup->remotePort = remotePort;
    connSetup->connectionId = connectionId;

    GLOMO_MsgSend(nodePtr, msg, (clocktype) waitTime);
    
    /* Send msg to self for scheduling the first packet */
    msg = GLOMO_MsgAlloc(nodePtr, GLOMO_APP_LAYER,
                         APP_NSTELNET_CLIENT, MSG_APP_NextPkt);
    GLOMO_MsgInfoAlloc(nodePtr, msg, sizeof(int));
    *((int *)msg->info) = connectionId;
    GLOMO_MsgSend(nodePtr, msg, (clocktype) waitTime 
                  + nstelnetPktInterval(nodePtr));
    
    msg = GLOMO_MsgAlloc(nodePtr, GLOMO_APP_LAYER,
                         APP_NSTELNET_CLIENT, MSG_APP_SetupConnection);
    
    GLOMO_MsgInfoAlloc(nodePtr, msg, sizeof(int));
    *((int *)msg->info) = connectionId;
    GLOMO_MsgSend(nodePtr, msg, (clocktype) waitTime);
}


/*
 * NAME:        nstelnetPktInterval.
 * PURPOSE:     call tcplib function nstelnet_interarrival to get the 
 *              between the arrival of the next packet and the current one. 
 * PARAMETERS:  nodePtr - pointer to the node.
 * RETRUN:      interarrival time in clocktype. 
 */
static clocktype
nstelnetPktInterval(GlomoNode *nodePtr)
{
    float interval;
    interval = telnet_interarrival(nodePtr->seed);
#ifdef DEBUG
    printf("NSTELNET interarrival = %f\n", interval);
#endif
    return (((clocktype)(interval + 0.5)) * MILLI_SECOND); 
}


/*
 * NAME:        newNstelnetClient.
 * PURPOSE:     create a new nstelnet client data structure, place it
                at the beginning of the application list. 
 * PARAMETERS:  nodePtr - pointer to the node, 
 *              openResult - result of the open request. 
 * RETRUN:      the pointer to the created nstelnet client data structure,
 *              NULL if no data structure allocated. 
 */
static GlomoAppNstelnetClient *
newNstelnetClient(GlomoNode *nodePtr, int connId)
{
    AppInfo *newApp;
    GlomoAppNstelnetClient *nstelnetClient;
    clocktype sessionTime;

    newApp = (AppInfo *) pc_malloc(sizeof(AppInfo));
    if (newApp == NULL) {
        assert(FALSE);
    }

    nstelnetClient = (GlomoAppNstelnetClient *) 
                    pc_malloc(sizeof(GlomoAppNstelnetClient)); 
    if (nstelnetClient == NULL) {
        pc_free(newApp);
        assert(FALSE);
    }

    /*
     * fill in connection id, etc.
     */
    newApp->appType = APP_NSTELNET_CLIENT;  
    nstelnetClient->connectionId = connId;
    nstelnetClient->sessionStart = simclock();
    assert(nodePtr->appData.telnetSessTime > 0);
    sessionTime = nodePtr->appData.telnetSessTime;
    nstelnetClient->sessionFinish = simclock() + sessionTime; 
    nstelnetClient->sessionIsClosed = FALSE;
    
    newApp->appDetail = nstelnetClient;
    
    newApp->appNext = nodePtr->appData.appPtr; 
    nodePtr->appData.appPtr = newApp;
    
    return nstelnetClient;
}

/*
 * NAME:        getNstelnetClient.
 * PURPOSE:     search for a nstelnet client data structure. 
 * PARAMETERS:  nodePtr - pointer to the node, 
 *              connId - connection ID of the nstelnet client. 
 * RETURN:      the pointer to the nstelnet client data structure,
 *              NULL if nothing found.
 */
static GlomoAppNstelnetClient *
getNstelnetClient(GlomoNode *nodePtr, int connId)
{
    AppInfo *appList = nodePtr->appData.appPtr;
    GlomoAppNstelnetClient *nstelnetClient;
    
    for (; appList != NULL; appList = appList->appNext) {
        if (appList->appType == APP_NSTELNET_CLIENT) {
            nstelnetClient = (GlomoAppNstelnetClient *) appList->appDetail;
            if (nstelnetClient->connectionId == connId) {
                return nstelnetClient;
            }
        }
    }
    return NULL;
}