Emulation_application.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 "Application.h"
 
#define EMULATION_APPLICATION_PROTOCOL_DEFAULT  _strdup("any")
#define EMULATION_APPLICATION_FILTER_STRING_DEFAULT _strdup("true")
#define EMULATION_APPLICATION_PRIORITY_DEFAULT  10
 
static UINT update_source_ip(NETSIM_IPAddress* realIP, char* szVal, UINT count)
{
    UINT i = 0;
    char* ip;
    ip = strtok(szVal, ",");
    while (ip)
    {
        if(strcmp(ip, "0.0.0.0"))
            realIP[i] = STR_TO_IP4(ip);
        i++;
        ip = strtok(NULL, ",");
    }
 
    if (i != count)
    {
        fnNetSimError("Real IP count (%d) and IP configured (%d) mismatched\n", count, i);
    }
    return i;
}
 
int fn_NetSim_Emulation_InitApplication(ptrAPPLICATION_INFO appInfo)
{
    APP_EMULATION_INFO* info = appInfo->appData;
 
    fnCreatePort(appInfo);
 
    //Create the socket buffer
    fnCreateSocketBuffer(appInfo);
 
    return 0;
}
 
int fn_NetSim_Application_ConfigureEmulationTraffic(ptrAPPLICATION_INFO appInfo,void* xmlNetSimNode)
{
    char* szVal;
    APP_EMULATION_INFO* info=(APP_EMULATION_INFO*)calloc(1,sizeof* info);
    void* xmlChild;
    appInfo->appData=info;
    xmlChild=fn_NetSim_xmlGetChildElement(xmlNetSimNode,"EMULATION",0);
    if(xmlChild)
    {
        szVal = fn_NetSim_xmlConfig_GetVal(xmlChild, "DESTINATION_REAL_IP", 1);
        if (szVal && strcmp(szVal, "0.0.0.0"))
            info->realDestIP = STR_TO_IP4(szVal);
        free(szVal);
 
        if (isMulticastIP(info->realDestIP))
        {
            info->isMulticast = true;
            info->count = appInfo->nSourceCount;
 
            info->realSourceIP = calloc(info->count, sizeof* info->realSourceIP);
            info->nSourceId = calloc(info->count, sizeof* info->nSourceId);
            info->simSourceIP = calloc(info->count, sizeof* info->simSourceIP);
        }
        else if (isBroadcastIP(info->realDestIP))
        {
            info->isBroadcast = true;
            info->isMulticast = false;
            info->count = appInfo->nSourceCount;
            info->realSourceIP = calloc(info->count, sizeof* info->realSourceIP);
            info->nSourceId = calloc(info->count, sizeof* info->nSourceId);
            info->simSourceIP = calloc(info->count, sizeof* info->simSourceIP);
        }
        else
        {
            info->count = 1;
            info->isMulticast = false;
            info->isBroadcast = false;
            info->realSourceIP = calloc(1, sizeof* info->realSourceIP);
            info->nSourceId = calloc(1, sizeof* info->nSourceId);
            info->simSourceIP = calloc(1, sizeof* info->simSourceIP);
        }
 
        szVal=fn_NetSim_xmlConfig_GetVal(xmlChild,"SOURCE_REAL_IP",0);
        if(!szVal)
            szVal = fn_NetSim_xmlConfig_GetVal(xmlChild, "DEVICE_REAL_IP", 1);
        info->count = update_source_ip(info->realSourceIP, szVal, info->count);
        free(szVal);
        
        szVal=fn_NetSim_xmlConfig_GetVal(xmlChild,"SOURCE_PORT",0);
        if(szVal)
            info->nSourcePort=atoi(szVal);
        free(szVal);
        szVal=fn_NetSim_xmlConfig_GetVal(xmlChild,"DESTINATION_PORT",0);
        if(szVal)
            info->nDestinationPort=atoi(szVal);
        free(szVal);
 
        getXmlVar(&info->protocol, PROTOCOL, xmlChild, 0, _STRING, EMULATION_APPLICATION);
        getXmlVar(&info->filterString, FILTER_STRING, xmlChild, 0, _STRING, EMULATION_APPLICATION);
        getXmlVar(&info->priority, PRIORITY, xmlChild, 0, _UINT, EMULATION_APPLICATION);
    }
    else
        return 0;
    //Assign other value
    if (!(info->isMulticast || info->isBroadcast))
    {
        info->nDestinationId = appInfo->destList[0];
        info->simDestIP = fn_NetSim_Stack_GetIPAddressAsId(info->nDestinationId, 1);
    }
    UINT i;
    for (i = 0; i < info->count; i++)
    {
        info->nSourceId[i] = appInfo->sourceList[i];
        info->simSourceIP[i] = fn_NetSim_Stack_GetIPAddressAsId(info->nSourceId[i], 1);
    }
    fn_NetSim_Emulation_InitApplication(appInfo);
    //Add the emulation environment variable
    _putenv("NETSIM_EMULATOR=1");
    return 0;
}
 
void fn_NetSim_Emulation_StartApplication(ptrAPPLICATION_INFO appInfo)
{
    if (appInfo->nTransmissionType == MULTICAST)
    {
        add_multicast_route(appInfo);
        join_multicast_group(appInfo, appInfo->dStartTime);
    }
}