Burst.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 "Cellular.h"
unsigned int nBurstId=0;
/**
Burst is used for the standard communications between the basestation and the mobile, and typically 
transfers the digitised voice data.
This function is used to form the burst.
*/
int fn_NetSim_Cellular_FormBurst(NetSim_PACKET* packet,Cellular_MS_MAC* MSMac)
{
    unsigned int flag=0;
    double dPacketSize;
    NetSim_PACKET* temp,*temp1;
    NETSIM_ID nApplicationId=packet->pstruAppData->nApplicationId;
    NETSIM_ID nSourceId=packet->nSourceId;
    NETSIM_ID nDestinationId = get_first_dest_from_packet(packet);
    if(MSMac->pstruPacketList==NULL)
    {
        NETSIM_ID i,j;
        MSMac->pstruPacketList=calloc(NETWORK->nApplicationCount+1,sizeof* MSMac->pstruPacketList);
        for(i=0;i<NETWORK->nApplicationCount+1;i++)
        {
            MSMac->pstruPacketList[i]=calloc(NETWORK->nDeviceCount,sizeof* MSMac->pstruPacketList[i]);
            for(j=0;j<NETWORK->nDeviceCount;j++)
            {
                MSMac->pstruPacketList[i][j]=calloc(NETWORK->nDeviceCount,sizeof* MSMac->pstruPacketList[i][j]);
            }
        }
    }
    if(pstruEventDetails->nProtocolId==MAC_PROTOCOL_GSM)
    {
        dPacketSize=packet->pstruNetworkData->dPacketSize;
        nBurstId++;
        temp1=MSMac->pstruPacketList[nApplicationId][nSourceId-1][nDestinationId-1];
        if(temp1==NULL)flag=1;
        while(temp1 && temp1->pstruNextPacket)
            temp1=temp1->pstruNextPacket;//move last
        while(dPacketSize>0)
        {
            Cellular_PACKET* gsmPacket=calloc(1,sizeof* gsmPacket);
            temp=fn_NetSim_Packet_CopyPacket(packet);
            temp->pstruMacData->dArrivalTime=packet->pstruNetworkData->dEndTime;
            if(dPacketSize>=GSM_PAYLOAD)
            {
                temp->pstruMacData->dPayload=GSM_PAYLOAD;
                temp->pstruAppData->dPayload=GSM_PAYLOAD;
                temp->pstruTransportData->dPayload=GSM_PAYLOAD;
                temp->pstruNetworkData->dPayload=GSM_PAYLOAD;
            }
            else
            {
                temp->pstruMacData->dPayload=dPacketSize;
                temp->pstruAppData->dPayload=dPacketSize;
                temp->pstruTransportData->dPayload=dPacketSize;
                temp->pstruNetworkData->dPayload=dPacketSize;
            }
            dPacketSize-=GSM_PAYLOAD;
            temp->pstruMacData->nMACProtocol=MAC_PROTOCOL_GSM;
            temp->pstruMacData->Packet_MACProtocol=gsmPacket;
            gsmPacket->nId=nBurstId;
            gsmPacket->originalPacket=packet;
            gsmPacket->nApplicationId=nApplicationId;
            if(dPacketSize<=0)
                gsmPacket->isLast=1;
            if(temp1)
            {
                temp1->pstruNextPacket=temp;
                temp1=temp;
            }
            else
            {
                temp1=temp;
                MSMac->pstruPacketList[nApplicationId][nSourceId-1][nDestinationId-1]=temp;
            }
        }
    }
    else if(pstruEventDetails->nProtocolId==MAC_PROTOCOL_CDMA)
    {
        Cellular_PACKET* gsmPacket=calloc(1,sizeof* gsmPacket);
        temp1=MSMac->pstruPacketList[nApplicationId][nSourceId-1][nDestinationId-1];
        if(temp1==NULL)flag=1;
        while(temp1 && temp1->pstruNextPacket)
            temp1=temp1->pstruNextPacket;//move last
        temp=packet;
        temp->pstruMacData->dArrivalTime=packet->pstruNetworkData->dEndTime;
        temp->pstruMacData->dPayload=packet->pstruNetworkData->dPacketSize;
        temp->pstruMacData->nMACProtocol=MAC_PROTOCOL_CDMA;
        temp->pstruMacData->Packet_MACProtocol=gsmPacket;
        gsmPacket->nId=1;
        gsmPacket->originalPacket=packet;
        gsmPacket->nApplicationId=nApplicationId;
        gsmPacket->isLast=1;
        if(temp1)
        {
            temp1->pstruNextPacket=temp;
            temp1=temp;
        }
        else
        {
            temp1=temp;
            MSMac->pstruPacketList[nApplicationId][nSourceId-1][nDestinationId-1]=temp;
        }
    }
    if(flag && MSMac->pstruAllocatedChannel)
    {
        //Transmit next packet
        Cellular_PACKET* gsmPacket;
        Cellular_CHANNEL* channel=MSMac->pstruAllocatedChannel;
        NetSim_PACKET* packet=MSMac->pstruPacketList[channel->nApplicationId][channel->nMSId-1][channel->nDestId-1];
        packet->pstruMacData->dEndTime=pstruEventDetails->dEventTime;
        if(pstruEventDetails->nProtocolId==MAC_PROTOCOL_GSM)
            packet->pstruMacData->dOverhead=GSM_OVERHEAD;
        else
            packet->pstruMacData->dOverhead=0;
        packet->pstruMacData->dPacketSize=packet->pstruMacData->dOverhead+packet->pstruMacData->dPayload;
        packet->pstruMacData->dStartTime=pstruEventDetails->dEventTime;
        gsmPacket=packet->pstruMacData->Packet_MACProtocol;
        gsmPacket->nTimeSlot=channel->nTimeSlot;
        //Write physical out event
        if(DEVICE_PHYLAYER(pstruEventDetails->nDeviceId,pstruEventDetails->nInterfaceId)->dLastPacketEndTime>pstruEventDetails->dEventTime)
            pstruEventDetails->dEventTime=DEVICE_PHYLAYER(pstruEventDetails->nDeviceId,pstruEventDetails->nInterfaceId)->dLastPacketEndTime;
        pstruEventDetails->dPacketSize=fnGetPacketSize(packet);
        pstruEventDetails->nApplicationId=packet->pstruAppData->nApplicationId;
        pstruEventDetails->nEventType=PHYSICAL_OUT_EVENT;
        pstruEventDetails->nPacketId=packet->nPacketId;
        pstruEventDetails->nSegmentId=packet->pstruAppData->nSegmentId;
        pstruEventDetails->pPacket=packet;
        fnpAddEvent(pstruEventDetails);
        MSMac->pstruPacketList[channel->nApplicationId][channel->nMSId-1][channel->nDestId-1]=MSMac->pstruPacketList[channel->nApplicationId][channel->nMSId-1][channel->nDestId-1]->pstruNextPacket;
    }
    return 1;
}
/**
This function is used to reassemble the burst.
*/
int fn_NetSim_Cellular_MS_ReassembleBurst()
{
    NetSim_PACKET* temp=pstruEventDetails->pPacket;
    Cellular_PACKET* gsmPacket=pstruEventDetails->pPacket->pstruMacData->Packet_MACProtocol;
    if(gsmPacket->isLast)
    {
        NetSim_PACKET* packet=gsmPacket->originalPacket;
        //add network in event
        pstruEventDetails->dPacketSize=fnGetPacketSize(packet);
        pstruEventDetails->nEventType=NETWORK_IN_EVENT;
        pstruEventDetails->nPacketId=packet->nPacketId;
        pstruEventDetails->nProtocolId=fn_NetSim_Stack_GetNWProtocol(pstruEventDetails->nDeviceId);
        pstruEventDetails->pPacket=packet;
        fnpAddEvent(pstruEventDetails);
    }
    if(temp->pstruMacData->nMACProtocol==MAC_PROTOCOL_GSM)
        fn_NetSim_Packet_FreePacket(temp);
    return 1;
}