--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/g23m-gsm/dl/dl_dcch0.c	Thu Jun 09 00:02:41 2016 +0000
@@ -0,0 +1,552 @@
+/*
++-----------------------------------------------------------------------------
+|  Project :  GSM-PS
+|  Modul   :  DL_DCCH0
++-----------------------------------------------------------------------------
+|  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 stand alone
+|             dedicated control channel (SDCCH) and the fast dedicated
+|             control channel (FACCH) each with SAPI 0 of the component DL
++-----------------------------------------------------------------------------
+*/
+
+#ifndef DL_DCCH0_C
+#define DL_DCCH0_C
+
+#include "config.h"
+#include "fixedconf.h"
+#include "condat-features.h"
+
+#define ENTITY_DL
+
+/*==== INCLUDES ===================================================*/
+#include "typedefs.h"
+#include "string.h"
+#include "vsi.h"
+#include "pconst.cdg"
+#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 =====================================================*/
+LOCAL void dcch0_resume_reconnect_req (T_PRIM                 * prim,
+                                       U8                       ch_type);
+/*==== VARIABLES ==================================================*/
+/*==== FUNCTIONS ==================================================*/
+/*
++--------------------------------------------------------------------+
+| PROJECT : GSM-PS (6147)       MODULE  : DL_SDCCH                   |
+| STATE   : code                ROUTINE : sdcch0_init_dl_data        |
++--------------------------------------------------------------------+
+
+  PURPOSE : Initialisation of DCCH data (SAPI 0) for an instance.
+
+*/
+
+GLOBAL void dcch0_init_dl_data (void)
+{
+  GET_INSTANCE_DATA;
+  T_CCH *pcch = &dl_data->cch[C_DCCH0];
+
+  TRACE_FUNCTION ("dcch0_init_dl_data()");
+
+  memset (pcch, 0, sizeof (T_CCH));
+
+  dcch3_init_dl_data (); /*Disabling SAPI 3 connections */
+
+  com_clear_queue (PS_SAPI_0);
+  dl_data->rr_short_pd_buffer.l_buf = 0;
+
+  if (dl_data->dcch0_in_msg)
+  {
+      COM_FREE_POINTER (dl_data->dcch0_in_msg);
+      dl_data->dcch0_in_msg = NULL;
+  }
+
+  dl_data->RR_dedicated = FALSE;
+  dl_data->dcch0_ch_type = 0;
+  dl_data->dcch0_disc_request  = FALSE;
+
+#if defined(DELAYED_SABM)
+  dl_data->dcch0_sabm_delay = 0;
+  dl_data->dcch0_sabm_flag = NOT_PRESENT_8BIT;
+#endif  /* DELAYED_SABM */
+#if defined(DELAYED_RELEASE_IND)
+  dl_data->release_ind_delay = 0;
+  dl_data->release_ind_ch_type = NOT_PRESENT_8BIT;
+#endif  /* DELAYED_RELEASE_IND */
+  set_channel_state(C_DCCH0, STATE_IDLE_DL);
+
+  sacch0_init_dl_data ();
+}
+
+#if defined(DELAYED_SABM)
+GLOBAL void dcch0_delay_sabm (T_CCH *pcch)
+{
+  GET_INSTANCE_DATA;
+  BOOL send_sabm = FALSE;
+  
+  if (dl_data->dcch0_sabm_flag EQ NOT_PRESENT_8BIT) 
+  { 
+    if ((pcch->ch_type EQ L2_CHANNEL_FACCH_F) OR (pcch->ch_type EQ L2_CHANNEL_FACCH_H))
+    { /* start delay */
+      pcch->vtx = EMPTY_CMD; /* send dummy only */
+      dl_data->dcch0_sabm_flag  = SABM_CMD;
+      dl_data->dcch0_sabm_delay = DL_FACCH_SABM_DELAY_VALUE;
+      DL_OFFLINE_TRACE (TRACE_DL_EVENT, C_DCCH0, pcch->ch_type, "delay SABM on FACCH");
+    }
+    else
+    { /* but for FACCH only */
+      send_sabm = TRUE;
+    }
+  }
+  else /* this part is called also called during uplink opportunity */
+  { /* pending delay */
+    if (dl_data->dcch0_sabm_delay > 0)
+    {
+      dl_data->dcch0_sabm_delay--;
+      DL_OFFLINE_TRACE (TRACE_DL_EVENT, C_DCCH0, pcch->ch_type, "pending delayed SABM");
+    }
+    else
+    {/* finishing delay, send SABM with the current (next) uplink opportunity */
+      #if !defined(DL_TRACE_ENABLED)
+        TRACE_EVENT ("delayed SABM");
+      #endif  /* ! DL_TRACE_ENABLED*/
+      dl_data->dcch0_sabm_flag = NOT_PRESENT_8BIT;
+      send_sabm = TRUE;
+      DL_OFFLINE_TRACE (TRACE_DL_EVENT, C_DCCH0, pcch->ch_type, "send delayed SABM");
+    }
+  }
+
+  if (send_sabm)
+  {
+    pcch->vtx = SABM_CMD;
+    pcch->time_flag  = TRUE;
+    pcch->rc         = 0;
+    set_channel_state (C_DCCH0, STATE_CONTENTION_RESOLUTION);
+  }
+}
+
+
+#endif  /* DELAYED_SABM */
+
+/*
++--------------------------------------------------------------------+
+| PROJECT : GSM-PS (6147)       MODULE  : DL_SDCCH                   |
+| STATE   : code                ROUTINE : sdcch0_establish_req       |
++--------------------------------------------------------------------+
+
+  PURPOSE : Establish Request for SDCCH SAPI 0.
+
+*/
+
+GLOBAL void dcch0_establish_req (T_DL_ESTABLISH_REQ * est_req)
+{
+  GET_INSTANCE_DATA;
+  T_CCH *pcch = &dl_data->cch[C_DCCH0];
+
+  TRACE_FUNCTION ("sdcch0_establish_req()");
+
+  DL_OFFLINE_TRACE (TRACE_DL_EVENT, C_DCCH0, est_req->ch_type, "est req");
+
+  dl_data->dcch0_ch_type = pcch->ch_type = est_req->ch_type;
+  TRACE_EVENT_WIN_P1 ("set dcch0_ch_type=%s", CH_TYPE_NAME[dl_data->dcch0_ch_type]);
+
+  dl_data->dcch0_unserved = com_queue_awaiting_transmission (PS_SAPI_0) ?
+                            DL_UNSERVED : DL_ALL_DONE;
+  switch (dl_data->state[C_DCCH0])
+  {
+    case STATE_IDLE_DL:
+      /*
+       * initialize sacch buffer
+       */
+      dl_data->sacch_act_buffer = meas_report_no_nc;
+      dl_data->sacch_last_buffer= meas_report_no_nc;
+
+      com_clear_queue (PS_SAPI_0);
+      pcch->contention_resolution = TRUE;
+      dl_data->dcch0_queue.switch_buffer = (T_DL_DATA_REQ*)est_req;
+      dl_data->dcch0_disc_request  = FALSE;
+#if defined(DELAYED_SABM)
+      dcch0_delay_sabm(pcch);
+#else  /* DELAYED_SABM */
+      pcch->vtx        = SABM_CMD;
+      pcch->time_flag  = TRUE;
+      pcch->rc         = 0;
+      set_channel_state (C_DCCH0, STATE_CONTENTION_RESOLUTION);
+#endif  /* DELAYED_SABM */
+      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__);
+#if defined(DELAYED_SABM)
+      dcch0_delay_sabm(pcch);
+#endif  /* DELAYED_SABM */
+      break;
+
+    case STATE_MULTIPLE_FRAME_ESTABLISHED:
+    case STATE_TIMER_RECOVERY:
+      if (est_req->sdu.l_buf EQ 0)
+      {
+        dcch3_init_dl_data (); /*Disabling SAPI 3 connections */
+        com_clear_queue (PS_SAPI_0);
+        pcch->T200_counter           = 0;
+        pcch->contention_resolution  = FALSE;
+        pcch->vtx                    = SABM_CMD;
+        pcch->time_flag              = TRUE;
+        pcch->rc                     = 0;
+        set_channel_state (C_DCCH0, STATE_CONTENTION_RESOLUTION);
+        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__);
+      }
+      else
+      {
+        dcch0_mdl_release_req ();
+      }
+      COM_FREE_POINTER (est_req);
+      break;
+
+    default:
+      COM_FREE_POINTER (est_req);
+      dcch0_mdl_release_req ();
+     break;
+  }
+}
+
+/*
++--------------------------------------------------------------------+
+| PROJECT : GSM-PS (6147)       MODULE  : DL_SDCCH                   |
+| STATE   : code                ROUTINE : sdcch0_resume_req          |
++--------------------------------------------------------------------+
+
+  PURPOSE : Resume Request for SDCCH (SAPI 0).
+
+*/
+
+GLOBAL void dcch0_resume_req (T_DL_RESUME_REQ * resume_req)
+{
+  
+  TRACE_FUNCTION ("dcch0_resume_req()");
+
+  DL_OFFLINE_TRACE (TRACE_DL_EVENT, C_DCCH0, resume_req->ch_type, "resume req");
+
+  dcch0_resume_reconnect_req( (T_PRIM *)D2P(resume_req), resume_req->ch_type);
+}
+
+/*
++--------------------------------------------------------------------+
+| PROJECT : GSM-PS (6147)       MODULE  : DL_SDCCH                   |
+| STATE   : code                ROUTINE : sdcch0_reconnect_req       |
++--------------------------------------------------------------------+
+
+  PURPOSE : Reconnect Request for SDCCH (SAPI 0).
+
+*/
+
+GLOBAL void dcch0_reconnect_req (T_DL_RECONNECT_REQ * reconnect_req)
+{
+  
+  TRACE_FUNCTION ("dcch0_reconnect_req()");
+
+  DL_OFFLINE_TRACE (TRACE_DL_EVENT, C_DCCH0, reconnect_req->ch_type, "reconn req");
+
+  dcch0_resume_reconnect_req( (T_PRIM *)D2P (reconnect_req),reconnect_req->ch_type);
+}
+
+/*
++--------------------------------------------------------------------+
+| PROJECT : GSM-PS (6147)       MODULE  : DL_SDCCH                   |
+| STATE   : code                ROUTINE : dcch0_res_recon_req        |
++--------------------------------------------------------------------+
+
+  PURPOSE : This function processes Resume Request and Reconnect Request 
+            for SDCCH (SAPI 0).
+
+*/
+LOCAL void dcch0_resume_reconnect_req (T_PRIM                 * prim,
+                                        U8                       ch_type)
+{
+  GET_INSTANCE_DATA;
+  TRACE_FUNCTION ("dcch0_resume_reconnect_req()");
+
+  switch (dl_data->state[C_DCCH0])
+  {
+    case STATE_SUSPENDED:
+    case STATE_IDLE_DL:
+    {
+      T_CCH *pcch = &dl_data->cch[C_DCCH0];
+
+      dl_data->dcch0_ch_type = pcch->ch_type = ch_type;
+
+      TRACE_EVENT_WIN_P1 ("set dcch0_ch_type=%s", CH_TYPE_NAME[dl_data->dcch0_ch_type]);
+
+      com_restore_queue(PS_SAPI_0, (T_DL_DATA_REQ*)P2D(prim));
+
+      pcch->contention_resolution = FALSE;
+
+#if defined(DELAYED_SABM)
+      dcch0_delay_sabm(dl_data, pcch);
+#else  /* DELAYED_SABM */
+      pcch->vtx        = SABM_CMD;
+      pcch->time_flag  = TRUE;
+      pcch->rc         = 0;
+      set_channel_state (C_DCCH0, STATE_CONTENTION_RESOLUTION);
+#endif  /* DELAYED_SABM */
+
+      if(prim->custom.opc EQ DL_RECONNECT_REQ)
+      {
+        TRACE_EVENT_WIN_P5 ("RECONN_REQ: %s SAPI=%u vtx=%s (%s#%u)", CH_TYPE_NAME[pcch->ch_type],
+                                            PS_SAPI_0, VTX_NAME[pcch->vtx],
+                                            __FILE10__, __LINE__);
+      }
+      else
+      {
+        TRACE_EVENT_WIN_P5 ("RESUME_REQ: %s SAPI=%u vtx=%s (%s#%u)", CH_TYPE_NAME[pcch->ch_type],
+                                            PS_SAPI_0, VTX_NAME[pcch->vtx],
+                                            __FILE10__, __LINE__);
+
+        /* invalid measurement report first */
+        sacch0_reset_meas ();
+      }
+      break;
+    }
+    default:
+      {
+        COM_FREE_POINTER (P2D(prim));
+      }
+      break;
+  }/* endswitch */
+}
+
+/*
++--------------------------------------------------------------------+
+| PROJECT : GSM-PS (6147)       MODULE  : DL_SDCCH                   |
+| STATE   : code                ROUTINE : sdcch0_release_req         |
++--------------------------------------------------------------------+
+
+  PURPOSE : Release Request for SDCCH (SAPI 0).
+
+*/
+
+GLOBAL BOOL dcch0_release_req (T_DL_RELEASE_REQ * release_req)
+{
+  GET_INSTANCE_DATA;
+  BOOL bFree = TRUE;
+
+  TRACE_FUNCTION ("dcch0_release_req()");
+
+  if (release_req->mode EQ DL_LOCAL_END_RELEASE)
+  {
+    DL_OFFLINE_TRACE (TRACE_DL_EVENT, C_DCCH0, release_req->ch_type, "local end release req");
+    dcch0_init_dl_data ();
+    bFree = FALSE;
+  }
+  else
+  {
+    DL_OFFLINE_TRACE (TRACE_DL_EVENT, C_DCCH0, release_req->ch_type, "normal release req");
+    dl_data->cch[C_DCCH0].ch_type = release_req->ch_type;
+    switch (dl_data->state[C_DCCH0])
+    {
+      default:
+        bFree = FALSE;
+        break;
+
+      case STATE_CONTENTION_RESOLUTION:
+      case STATE_MULTIPLE_FRAME_ESTABLISHED:
+      case STATE_TIMER_RECOVERY:
+        if (!dl_data->dcch0_disc_request AND (dl_data->cch[C_DCCH0].vtx EQ RR_CMD))
+        {
+          dl_data->dcch0_disc_request = TRUE;
+          dcch3_init_dl_data (); /*Disabling SAPI 3 connections */
+        }
+        else
+        {
+          dcch3_init_dl_data (); /*Disabling SAPI 3 connections */
+          com_prepare_DISC (C_DCCH0, release_req->sapi);
+        }
+        break;
+
+      case STATE_AWAITING_RELEASE:
+        dl_data->cch[C_DCCH0].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_0) ? DL_UNSERVED : DL_ALL_DONE;
+    PSENDX (RR, release_cnf);
+    dcch0_init_dl_data ();
+  }
+
+  return bFree;
+}
+
+/*
++--------------------------------------------------------------------+
+| PROJECT : GSM-PS (6147)       MODULE  : DL_SDCCH                   |
+| STATE   : code                ROUTINE : sdcch0_mdl_release_req     |
++--------------------------------------------------------------------+
+
+  PURPOSE : Release Request from Mobility Management for SDCCH (SAPI 0).
+
+*/
+
+GLOBAL void dcch0_mdl_release_req (void)
+{
+  GET_INSTANCE_DATA;
+  TRACE_FUNCTION ("dcch0_mdl_release_req()");
+
+  DL_OFFLINE_TRACE (TRACE_DL_EVENT, C_DCCH0, dl_data->cch[C_DCCH0].ch_type, "mdl rel req");
+
+  switch (dl_data->state[C_DCCH0])
+  {
+    case STATE_CONTENTION_RESOLUTION:
+    case STATE_AWAITING_RELEASE:
+      drr_dl_release_cnf (dl_data->cch[C_DCCH0].ch_type, PS_SAPI_0, TRUE);
+      break;
+    case STATE_MULTIPLE_FRAME_ESTABLISHED:
+    case STATE_TIMER_RECOVERY:
+      drr_dl_release_ind (dl_data->cch[C_DCCH0].ch_type, PS_SAPI_0, NOT_PRESENT_8BIT, TRUE);
+      break;
+    default:
+      break;
+  }
+}
+
+/*
++--------------------------------------------------------------------+
+| PROJECT : GSM-PS (6147)       MODULE  : DL_SDCCH                   |
+| STATE   : code                ROUTINE : sdcch0_suspend_req         |
++--------------------------------------------------------------------+
+
+  PURPOSE : Suspend Request for SDCCH (SAPI 0).
+
+*/
+
+GLOBAL void dcch0_suspend_req (T_DL_SUSPEND_REQ * suspend_req)
+{
+  GET_INSTANCE_DATA;
+  T_CCH *pcch = &dl_data->cch[C_DCCH0];
+
+  TRACE_FUNCTION ("dcch0_suspend_req()");
+
+  DL_OFFLINE_TRACE (TRACE_DL_EVENT, C_DCCH0, suspend_req->ch_type, "suspend req");
+
+  pcch->ch_type = suspend_req->ch_type;
+
+  TRACE_EVENT_WIN_P1 ("reset dcch0_ch_type=%s ->0", CH_TYPE_NAME[dl_data->dcch0_ch_type]);
+  dl_data->dcch0_ch_type = 0;
+
+  switch (dl_data->state[C_DCCH0])
+  {
+    case STATE_CONTENTION_RESOLUTION:
+    case STATE_MULTIPLE_FRAME_ESTABLISHED:
+    case STATE_TIMER_RECOVERY:
+    case STATE_AWAITING_RELEASE:
+      pcch->T200_counter = 0;
+      pcch->time_flag             = FALSE;
+      pcch->contention_resolution = FALSE;
+      set_channel_state (C_DCCH0, STATE_SUSPENDED);
+      dcch3_init_dl_data (); /* Disabling SAPI 3 connections */
+
+#if 0 /* yes, from now DL sends measurement reports also in suspended state */
+      /*
+       * no further measurement reports
+       */
+      sacch0_reset_meas (dl_data);
+#endif  /* 0|1 */
+      break;
+
+    default:
+      TRACE_EVENT ("INVALID SUSPEND STATE");
+      break;
+  }
+  COM_FREE_POINTER (suspend_req);
+
+  TRACE_EVENT_WIN_P5 ("SUSPEND_REQ: %s SAPI=%u vtx=%s (%s#%u)", CH_TYPE_NAME[pcch->ch_type],
+                                      PS_SAPI_0, VTX_NAME[pcch->vtx],
+                                      __FILE10__, __LINE__);
+}
+
+/*
++--------------------------------------------------------------------+
+| PROJECT : GSM-PS (6147)       MODULE  : DL_SDCCH                   |
+| STATE   : code                ROUTINE : dcch0_check_disc           |
++--------------------------------------------------------------------+
+
+  PURPOSE : DISC command frame on DCCH0.
+
+*/
+
+GLOBAL int dcch0_check_disc (int send)
+{
+  GET_INSTANCE_DATA;
+  TRACE_FUNCTION ("dcch0_check_disc()");
+
+  if (dl_data->dcch0_disc_request AND !(dl_data->cch[C_DCCH0].vtx EQ RR_CMD))
+  {
+    dcch3_init_dl_data (); /*Disabling SAPI 3 connections */
+    com_prepare_DISC (C_DCCH0, PS_SAPI_0);
+    dl_data->dcch0_disc_request = FALSE;
+#if defined(DELAYED_SABM)
+    dl_data->dcch0_sabm_flag = NOT_PRESENT_8BIT; /* delete pending delayed SABM */
+#endif /* DELAYED_SABM */
+    return uplink_awaiting_release  (C_DCCH0, PS_SAPI_0);
+  }
+  else
+    return send;
+}
+
+/*
++--------------------------------------------------------------------+
+| PROJECT : GSM-PS (6147)       MODULE  : DL_SDCCH                   |
+| STATE   : code                ROUTINE : dcch0_data_req             |
++--------------------------------------------------------------------+
+
+  PURPOSE : Data Request on SDCCH (SAPI 0).
+
+*/
+
+GLOBAL void dcch0_data_req (T_DL_DATA_REQ * data_req)
+{
+  GET_INSTANCE_DATA;
+  TRACE_FUNCTION ("sdcch0_data_req()");
+
+  dl_data->cch[C_DCCH0].ch_type = data_req->ch_type;
+
+  switch (dl_data->state[C_DCCH0])
+  {
+    case STATE_MULTIPLE_FRAME_ESTABLISHED:
+    case STATE_TIMER_RECOVERY:
+    case STATE_SUSPENDED:
+    case STATE_CONTENTION_RESOLUTION:
+      com_store_queue (PS_SAPI_0, data_req);
+      break;
+
+    default:
+      COM_FREE_POINTER (data_req);
+      break;
+  }
+}
+
+#endif /* !DL_DCCH0_C */