+
−/*
+
−+-----------------------------------------------------------------------------
+
−|  Project :  GSM-PS
+
−|  Modul   :  DL_DCCH3
+
−+-----------------------------------------------------------------------------
+
−|  Copyright 2002 Texas Instruments Berlin, AG
+
−|                 All rights reserved.
+
−|
+
−|                 This file is confidential and a trade secret of Texas
+
−|                 Instruments Berlin, AG
+
−|                 The receipt of or possession of this file does not convey
+
−|                 any rights to reproduce or disclose its contents or to
+
−|                 manufacture, use, or sell anything it may describe, in
+
−|                 whole, or in part, without the specific written consent of
+
−|                 Texas Instruments Berlin, AG.
+
−+-----------------------------------------------------------------------------
+
−|  Purpose :  This Modul defines the functions for the slow
+
−|             dedicated control channel (SAPI 3) of the component DL
+
−+-----------------------------------------------------------------------------
+
−*/
+
−
+
−#ifndef DL_DCCH3_C
+
−#define DL_DCCH3_C
+
−
+
−#define ENTITY_DL
+
−
+
−/*==== INCLUDES ===================================================*/
+
−
+
−#include "typedefs.h"
+
−#include <string.h>
+
−#include "pconst.cdg"
+
−#include "vsi.h"
+
−#include "custom.h"
+
−#include "gsm.h"
+
−#include "mon_dl.h"
+
−#include "prim.h"
+
−#include "pei.h"
+
−#include "tok.h"
+
−#include "ccdapi.h"
+
−#include "dl.h"
+
−#include "dl_trc.h"
+
−
+
−
+
−/*==== EXPORT =====================================================*/
+
−
+
−/*==== PRIVAT =====================================================*/
+
−
+
−/*==== VARIABLES ==================================================*/
+
−
+
−/*==== FUNCTIONS ==================================================*/
+
−/*
+
−+--------------------------------------------------------------------+
+
−| PROJECT : GSM-PS (6147)       MODULE  : DL_DCCH3                   |
+
−| STATE   : code                ROUTINE : dcch3_init_dl_data         |
+
−+--------------------------------------------------------------------+
+
−
+
−  PURPOSE : Initialisation of SDCCH data (SAPI 3) for an instance.
+
−
+
−*/
+
−
+
−GLOBAL void dcch3_init_dl_data (void)
+
−{
+
−  GET_INSTANCE_DATA;
+
−  T_CCH *pcch = &dl_data->cch[C_DCCH3];
+
−
+
−  TRACE_FUNCTION ("dcch3_init_dl_data()");
+
−
+
−  memset (pcch, 0, sizeof (T_CCH));
+
−  com_clear_queue (PS_SAPI_3);
+
−
+
−  if (dl_data->dcch3_in_msg)
+
−  {
+
−    COM_FREE_POINTER (dl_data->dcch3_in_msg);
+
−    dl_data->dcch3_in_msg = NULL;
+
−  }
+
−
+
−  dl_data->dcch3_disc_request  = FALSE;
+
−  set_channel_state(C_DCCH3, STATE_DISABLED);
+
−}
+
−
+
−/*
+
−+--------------------------------------------------------------------+
+
−| PROJECT : GSM-PS (6147)       MODULE  : DL_DCCH3                   |
+
−| STATE   : code                ROUTINE : dcch3_enable               |
+
−+--------------------------------------------------------------------+
+
−
+
−  PURPOSE : Enabling SAPI 3 connections.
+
−
+
−*/
+
−
+
−GLOBAL void dcch3_enable (UBYTE ch_type)
+
−{
+
−  GET_INSTANCE_DATA;
+
−  TRACE_FUNCTION ("dcch3_enable()");
+
−
+
−  switch (dl_data->state[C_DCCH3])
+
−  {
+
−    case STATE_DISABLED:
+
−      set_channel_state (C_DCCH3, STATE_IDLE_DL);
+
−      dl_data->cch[C_DCCH3].ch_type = ch_type;
+
−      break;
+
−    default:
+
−      break;
+
−  }
+
−}
+
−
+
−/*
+
−+--------------------------------------------------------------------+
+
−| PROJECT : GSM-PS (6147)       MODULE  : DL_DCCH3                   |
+
−| STATE   : code                ROUTINE : dcch3_establish_req       |
+
−+--------------------------------------------------------------------+
+
−
+
−  PURPOSE : Establish Request for SDCCH (SAPI 3).
+
−
+
−*/
+
−
+
−GLOBAL void dcch3_establish_req (T_DL_ESTABLISH_REQ * est_req)
+
−{
+
−  GET_INSTANCE_DATA;
+
−  TRACE_FUNCTION ("dcch3_establish_req()");
+
−
+
−  DL_OFFLINE_TRACE (TRACE_DL_EVENT, C_DCCH3, est_req->ch_type, "est req");
+
−
+
−
+
−  switch (dl_data->state[C_DCCH3])
+
−  {
+
−    case STATE_IDLE_DL:
+
−    case STATE_DISABLED:
+
−    case STATE_MULTIPLE_FRAME_ESTABLISHED:
+
−    case STATE_TIMER_RECOVERY:
+
−      {
+
−        T_CCH *pcch = &dl_data->cch[C_DCCH3];
+
−
+
−        pcch->ch_type = est_req->ch_type;
+
−
+
−        dl_data->dcch3_disc_request  = FALSE;
+
−        dl_data->dcch3_unserved = com_queue_awaiting_transmission (PS_SAPI_3) ?
+
−                                  DL_UNSERVED : DL_ALL_DONE;
+
−
+
−        com_clear_queue (PS_SAPI_3);
+
−        pcch->vtx       = SABM_CMD;
+
−        pcch->time_flag = TRUE;
+
−        pcch->rc        = 0;
+
−        set_channel_state (C_DCCH3, STATE_AWAITING_ESTABLISHMENT);
+
−        TRACE_EVENT_WIN_P5 ("EST_REQ: %s SAPI=%u vtx=%s (%s#%u)", CH_TYPE_NAME[pcch->ch_type],
+
−                                            est_req->sapi, VTX_NAME[pcch->vtx],
+
−                                            __FILE10__, __LINE__);
+
−      }
+
−
+
−      break;
+
−    default:
+
−      break;
+
−  }
+
−  COM_FREE_POINTER (est_req);
+
−}
+
−
+
−/*
+
−+--------------------------------------------------------------------+
+
−| PROJECT : GSM-PS (6147)       MODULE  : DL_SDCCH                   |
+
−| STATE   : code                ROUTINE : sdcch3_release_req         |
+
−+--------------------------------------------------------------------+
+
−
+
−  PURPOSE : Release Request for SDCCH (SAPI 3).
+
−
+
−*/
+
−
+
−GLOBAL BOOL dcch3_release_req (T_DL_RELEASE_REQ * release_req)
+
−{
+
−  GET_INSTANCE_DATA;
+
−  BOOL bFree = TRUE;
+
−
+
−  TRACE_FUNCTION ("dcch3_release_req()");
+
−
+
−  if (release_req->mode EQ DL_LOCAL_END_RELEASE)
+
−  {
+
−    DL_OFFLINE_TRACE (TRACE_DL_EVENT, C_DCCH3, release_req->ch_type, "local end release req");
+
−    bFree = FALSE;
+
−  }
+
−  else
+
−  {
+
−    DL_OFFLINE_TRACE (TRACE_DL_EVENT, C_DCCH3, release_req->ch_type, "normal release req");
+
−    dl_data->cch[C_DCCH3].ch_type = release_req->ch_type;
+
−    switch (dl_data->state[C_DCCH3])
+
−    {
+
−      default:
+
−        bFree = FALSE;
+
−        break;
+
−
+
−      case STATE_AWAITING_ESTABLISHMENT:
+
−      case STATE_MULTIPLE_FRAME_ESTABLISHED:
+
−      case STATE_TIMER_RECOVERY:
+
−        if (!dl_data->dcch3_disc_request AND (dl_data->cch[C_DCCH3].vtx EQ RR_CMD))
+
−        {
+
−          dl_data->dcch3_disc_request = TRUE;
+
−        }
+
−        else
+
−        {
+
−          com_prepare_DISC (C_DCCH3, release_req->sapi);
+
−        }
+
−        break;
+
−
+
−      case STATE_AWAITING_RELEASE:
+
−        dl_data->cch[C_DCCH3].T200_counter = 0;
+
−        break;
+
−    }
+
−  }
+
−
+
−  if (bFree EQ FALSE)
+
−  {
+
−    PREUSE (release_req, release_cnf, DL_RELEASE_CNF);
+
−    release_cnf->indication =
+
−      com_queue_awaiting_transmission (PS_SAPI_3) ? DL_UNSERVED : DL_ALL_DONE;
+
−    PSENDX (RR, release_cnf);
+
−    dcch3_init_dl_data ();
+
−  }
+
−
+
−  return bFree;
+
−}
+
−
+
−
+
−/*
+
−+--------------------------------------------------------------------+
+
−| PROJECT : GSM-PS (6147)       MODULE  : DL_DCCH3                   |
+
−| STATE   : code                ROUTINE : dcch3_mdl_release_req     |
+
−+--------------------------------------------------------------------+
+
−
+
−  PURPOSE : Release Request from Mobility Management for SDCCH (SAPI 3).
+
−
+
−*/
+
−
+
−GLOBAL void dcch3_mdl_release_req (void)
+
−{
+
−  GET_INSTANCE_DATA;
+
−  TRACE_FUNCTION ("dcch3_mdl_release_req()");
+
−
+
−  DL_OFFLINE_TRACE (TRACE_DL_EVENT, C_DCCH3, dl_data->cch[C_DCCH3].ch_type, "mdl rel req");
+
−
+
−  switch (dl_data->state[C_DCCH3])
+
−  {
+
−    case STATE_AWAITING_ESTABLISHMENT:
+
−    case STATE_TIMER_RECOVERY:
+
−    case STATE_AWAITING_RELEASE:
+
−      drr_dl_release_cnf (dl_data->cch[C_DCCH3].ch_type, PS_SAPI_3, TRUE);
+
−      break;
+
−
+
−    case STATE_MULTIPLE_FRAME_ESTABLISHED:
+
−      drr_dl_release_ind (dl_data->cch[C_DCCH3].ch_type, PS_SAPI_3, NOT_PRESENT_8BIT, TRUE);
+
−      break;
+
−
+
−    default:
+
−      break;
+
−  }
+
−}
+
−
+
−/*
+
−+--------------------------------------------------------------------+
+
−| PROJECT : GSM-PS (6147)       MODULE  : DL_DCCH3                   |
+
−| STATE   : code                ROUTINE : dcch3_data_req            |
+
−+--------------------------------------------------------------------+
+
−
+
−  PURPOSE : Data Request on SDCCH (SAPI 3).
+
−
+
−*/
+
−
+
−GLOBAL void dcch3_data_req (T_DL_DATA_REQ * data_req)
+
−{
+
−  GET_INSTANCE_DATA;
+
−  TRACE_FUNCTION ("dcch3_data_req()");
+
−
+
−  switch (dl_data->state[C_DCCH3])
+
−  {
+
−    case STATE_MULTIPLE_FRAME_ESTABLISHED:
+
−    case STATE_TIMER_RECOVERY:
+
−      com_store_queue (PS_SAPI_3, data_req);
+
−      break;
+
−
+
−    default:
+
−      COM_FREE_POINTER (data_req);
+
−      break;
+
−  }
+
−}
+
−
+
−/*
+
−+--------------------------------------------------------------------+
+
−| PROJECT : GSM-PS (6147)       MODULE  : DL_SDCCH                   |
+
−| STATE   : code                ROUTINE : dcch3_check_disc           |
+
−+--------------------------------------------------------------------+
+
−
+
−  PURPOSE : DISC command frame on DCCH3.
+
−
+
−*/
+
−
+
−GLOBAL int dcch3_check_disc (int send)
+
−{
+
−  GET_INSTANCE_DATA;
+
−  TRACE_FUNCTION ("dcch3_check_disc()");
+
−
+
−  if (dl_data->dcch3_disc_request AND !(dl_data->cch[C_DCCH3].vtx EQ RR_CMD))
+
−  {
+
−    com_prepare_DISC (C_DCCH3, PS_SAPI_3);
+
−    return uplink_awaiting_release (C_DCCH3, PS_SAPI_3);
+
−  }
+
−  else
+
−    return send;
+
−}
+
−#endif /* DL_DCCH3_C */
+
−