IEEE802_11_PhyFrame.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 "IEEE802_11.h"
#include "IEEE802_11_Phy.h"
#include "IEEE802_11_PhyFrame.h"
 
int get_ofdm_rate(int rate)
{
    switch(rate)
    {
    case 6: return 0xD;
    case 9: return 0xF;
    case 12: return 0x5;
    case 18: return 0x7;
    case 24: return 0x9;
    case 36: return 0xB;
    case 48: return 0x1;
    case 54: return 0x3;
    default: return 0xD;
    }
}
 
/**
This function is called in the fn_NetSim_WLAN_PhysicalOut() function.
Add the PHY header pstruPacket->pstruPhyData->Packet_PhyData to the packet. 
*/
void fn_NetSim_IEEE802_11_Add_Phy_Header(NetSim_PACKET* packet, UINT64* transmissionId)
{
    /*Adding phy layer overhead does not affect result in netsim.*/
    PIEEE802_11_PHY_VAR phy = IEEE802_11_CURR_PHY;
    ptrIEEE802_11_PHY_HDR hdr = calloc(1, sizeof* hdr);
    if (*transmissionId == 0)
        hdr->transmissionId = ++phy->transmissionId;
    else hdr->transmissionId = *transmissionId;
    *transmissionId = hdr->transmissionId;
    PACKET_PHYPROTOCOLDATA(packet) = hdr;
    return;
 
    
    //PIEEE802_11_DSSS_PLCP_FRAME dsssPlcp;
    //PIEEE802_11_OFDM_PLCP_FRAME ofdmPlcp;
    //PIEEE802_11_HT_PLCP_FRAME htPlcp;
    //
    //switch(phy->PhyProtocol)
    //{
    //case IEEE_802_11b:
    //  dsssPlcp = (PIEEE802_11_DSSS_PLCP_FRAME)calloc(1, sizeof *dsssPlcp);
    //  dsssPlcp->nSIGNAL = phy->PHY_TYPE.dsssPhy.dsssrate;
    //  packet->pstruPhyData->Packet_PhyData = dsssPlcp;
    //  break;
    //case IEEE_802_11a:
    //case IEEE_802_11g:
    //case IEEE_802_11p:
    //  ofdmPlcp = (PIEEE802_11_OFDM_PLCP_FRAME)calloc(1, sizeof *ofdmPlcp);
    //  ofdmPlcp->nRATE = get_ofdm_rate((int)phy->PHY_TYPE.ofdmPhy.dDataRate);
    //  packet->pstruPhyData->Packet_PhyData = ofdmPlcp;
    //  break;
    //case IEEE_802_11n:
    //case IEEE_802_11ac:
    //  htPlcp = (PIEEE802_11_HT_PLCP_FRAME)calloc(1,sizeof* htPlcp);       
    //  // Assign the relevant values of sig field
    //  htPlcp->nMCS = phy->MCS;
    //  if(phy->PHY_TYPE.ofdmPhy_11n.nCH_BANDWIDTH == HT_CBW40)
    //      htPlcp->bCBW_20_40 = 1;
    //  
    //  if(phy->PHY_TYPE.ofdmPhy_11n.nAGGREGATION == AGGREGATED)
    //      htPlcp->bAggregation = 1;       
    //  
    //  if(phy->PHY_TYPE.ofdmPhy_11n.nSOUNDING == NOT_SOUNDING)
    //      htPlcp->bNot_Sounding = 1;      
    //  
    //  if(phy->PHY_TYPE.ofdmPhy_11n.nSMOOTHING == SMOOTHING_REC)
    //      htPlcp->bSmoothing = 1;
    //  
    //  if(phy->nGuardInterval == 400)
    //      htPlcp->bShort_GI = 1;
    //  
    //  if(phy->PHY_TYPE.ofdmPhy_11n.nFEC_CODING == LDPC_CODING)
    //      htPlcp->bFEC_coding = 1;
    //  packet->pstruPhyData->Packet_PhyData  = htPlcp;     
    //  break;
    //default:
    //  fnNetSimError("Unknown phy protocol %d in %s.",phy->PhyProtocol,__FUNCTION__);
    //  break;
    //}
}
 
void free_ieee802_11_phy_header(NetSim_PACKET* packet)
{
    ptrIEEE802_11_PHY_HDR hdr = PACKET_PHYPROTOCOLDATA(packet);
    free(hdr);
    PACKET_PHYPROTOCOLDATA(packet) = NULL;
}
 
void copy_ieee802_11_phy_header(NetSim_PACKET* d, NetSim_PACKET* s)
{
    ptrIEEE802_11_PHY_HDR sh = PACKET_PHYPROTOCOLDATA(s);
    if (sh)
    {
        ptrIEEE802_11_PHY_HDR dh = calloc(1, sizeof* dh);
        memcpy(dh, sh, sizeof* dh);
        PACKET_PHYPROTOCOLDATA(d) = dh;
    }
}