UDP.c

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/************************************************************************************
* Copyright (C) 2021                                                                *
* 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.       *
*                                                                                   *
* This source code is licensed per the NetSim license agreement.                    *
*                                                                                   *
* No portion of this source code may be used as the basis for a derivative work,    *
* or used, for any purpose other than its intended use per the NetSim license       *
* agreement.                                                                        *
*                                                                                   *
* This source code and the algorithms contained within it are confidential trade    *
* secrets of TETCOS and may not be used as the basis for any other software,        *
* hardware, product or service.                                                     *
*                                                                                   *
* Author:    Shashi Kant Suman                                                      *
*                                                                                   *
* ----------------------------------------------------------------------------------*/
 
#include "main.h"
#include "UDP.h"
 
/**
        This function is called by NetworkStack.dll, whenever the event gets triggered  
        inside the NetworkStack.dll for the Transport layer UDP protocol
*/
_declspec (dllexport) int fn_NetSim_UDP_Run()
{
    nEventType=pstruEventDetails->nEventType;   /* Get the EventType from Event details */
 
    /*Check  event type*/
    switch(nEventType)
    {
    case TRANSPORT_OUT_EVENT:
        /* Send the user datagram */
        fn_NetSim_UDP_Send_User_Datagram();
        break;
    case TRANSPORT_IN_EVENT:
        /* Receive the user datagram */
        fn_NetSim_UDP_Receive_User_Datagram();
        break;  
    default:
        fnNetSimError("UDP-- Unknown event type for UDP protocol\n");
        break;
    }
    return 0;
}
 
/********************************************************************************/
/* The Following functions are present in the libUDP.lib.                       */
/* so NetworkStack.dll can not call libUDP.lib, NetworkStack.dll is calling     */
/* libUDP.dll. From libUDP.dll, libUDP.lib functions are called.                */
/********************************************************************************/
/**
    This function is called by NetworkStack.dll, while configuring the device 
    TRANSPORT layer for UDP protocol.   
*/
_declspec(dllexport) int fn_NetSim_UDP_Configure(void** var)
{
    return fn_NetSim_UDP_Configure_F(var);
}
 
/**
    This functon initializes the UDP parameters. 
*/
_declspec (dllexport) int fn_NetSim_UDP_Init()
{
    return fn_NetSim_UDP_Init_F();
}
/**
    This function is called by NetworkStack.dll, once simulation end to free the 
    allocated memory for the network.   
*/
_declspec(dllexport) int fn_NetSim_UDP_Finish()
{
    fn_NetSim_UDP_Finish_F();
    return 0;
}   
 
/************************************************************************************/
/* This function will return the string to wrie packet trace heading                */                                                                          
/************************************************************************************/
/**
    This function will return the string to wrie packet trace heading
*/
_declspec(dllexport) char* fn_NetSim_UDP_ConfigPacketTrace()
{
    return "";
}
 
/************************************************************************************/
/* This function will return the string to wrie packet trace                        */                                                                          
/************************************************************************************/
_declspec(dllexport) int fn_NetSim_UDP_WritePacketTrace(NetSim_PACKET* pstruPacket,char** ppszTrace)
{
    pstruPacket;
    ppszTrace;
    return 1;
}
/**
    This function is called by NetworkStack.dll, while writing the evnt trace 
    to get the sub event as a string.
*/
_declspec(dllexport) char *fn_NetSim_UDP_Trace(int nSubEvent)
{
    return (fn_NetSim_UDP_Trace_F(nSubEvent));
}
 
_declspec(dllexport) int fn_NetSim_UDP_FreePacket(NetSim_PACKET* pstruPacket)
{
    return fn_NetSim_UDP_FreePacket_F(pstruPacket); 
}
/**
    This function is called by NetworkStack.dll, to free the packet of UDP protocol
*/
_declspec(dllexport) int fn_NetSim_UDP_CopyPacket(NetSim_PACKET* pstruDestPacket,NetSim_PACKET* pstruSrcPacket)
{
    return fn_NetSim_UDP_CopyPacket_F(pstruDestPacket,pstruSrcPacket);  
}
/** This function write the Metrics in Metrics.txt */
_declspec(dllexport) int fn_NetSim_UDP_Metrics(PMETRICSWRITER metricsWriter)
{
    return fn_NetSim_UDP_Metrics_F(metricsWriter);
}