Channel.c

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/************************************************************************************
* Copyright (C) 2020                                                               *
* 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 "IEEE1609.h"
 
void Init_Channel_Switching(NETSIM_ID ndeviceId, NETSIM_ID nInterfaceId)
{
    memset(pstruEventDetails, 0, sizeof* pstruEventDetails);
    pstruEventDetails->nDeviceId = ndeviceId;
    pstruEventDetails->nDeviceType = DEVICE_TYPE(ndeviceId);
    pstruEventDetails->nEventType = TIMER_EVENT;
    pstruEventDetails->nInterfaceId = nInterfaceId;
    pstruEventDetails->nProtocolId = MAC_PROTOCOL_IEEE1609;
    pstruEventDetails->nSubEventType = CHANNEL_SWITCH_END;
    fnpAddEvent(pstruEventDetails);
    GET_IEEE1609_CURR_MAC_VAR->CHANNEL_INFO.prevChannel = IEEE1609_ChannelType_SCH;
}
 
void fn_NetSim_IEEE1609_ChannelSwitch_End()
{
    double t;
    NetSim_EVENTDETAILS pevent;
    memcpy(&pevent, pstruEventDetails, sizeof pevent);
 
    switch (GET_IEEE1609_CURR_MAC_VAR->CHANNEL_INFO.prevChannel)
    {
    case IEEE1609_ChannelType_SCH:
        t = GET_IEEE1609_CURR_MAC_VAR->dCCH_Time;
        GET_IEEE1609_CURR_MAC_VAR->CHANNEL_INFO.channel_type = IEEE1609_ChannelType_CCH;
        break;
    case IEEE1609_ChannelType_CCH:
        t = GET_IEEE1609_CURR_MAC_VAR->dSCH_Time;
        GET_IEEE1609_CURR_MAC_VAR->CHANNEL_INFO.channel_type = IEEE1609_ChannelType_SCH;
        break;
    default:
        fnNetSimError("Unknown channel type %d for IEEE1609 protocol\n",
            GET_IEEE1609_CURR_MAC_VAR->CHANNEL_INFO.prevChannel);
        break;
    }
    GET_IEEE1609_CURR_MAC_VAR->CHANNEL_INFO.dStartTime = pstruEventDetails->dEventTime;
    pstruEventDetails->dEventTime += t;
    pstruEventDetails->nSubEventType = CHANNEL_SWITCH_START;
    fnpAddEvent(pstruEventDetails);
    GET_IEEE1609_CURR_MAC_VAR->CHANNEL_INFO.dEndTime = pstruEventDetails->dEventTime;
    
    //restore
    memcpy(pstruEventDetails, &pevent, sizeof* pstruEventDetails);
    restart_transmission();
}
 
void fn_NetSim_IEEE1609_ChannelSwitch_Start()
{
    pstruEventDetails->dEventTime += GET_IEEE1609_CURR_MAC_VAR->dGuard_Time;
    pstruEventDetails->nSubEventType = CHANNEL_SWITCH_END;
    fnpAddEvent(pstruEventDetails);
    GET_IEEE1609_CURR_MAC_VAR->CHANNEL_INFO.prevChannel =
        GET_IEEE1609_CURR_MAC_VAR->CHANNEL_INFO.channel_type;
    GET_IEEE1609_CURR_MAC_VAR->CHANNEL_INFO.channel_type = IEEE1609_ChannelType_GUARD;
}