--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/g23m-gprs/llc/llc_itxt.c	Thu Oct 13 04:24:13 2016 +0000
@@ -0,0 +1,182 @@
+/* 
++----------------------------------------------------------------------------- 
+|  Project :  
+|  Modul   :  
++----------------------------------------------------------------------------- 
+|  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 is part of the entity LLC and implements all 
+|             functions to handles the incoming primitives as described in 
+|             the SDL-documentation (T201-statemachine)
++----------------------------------------------------------------------------- 
+*/ 
+
+#ifndef LLC_ITXT_C
+#define LLC_ITXT_C
+#endif
+
+#define ENTITY_LLC
+
+/*==== INCLUDES =============================================================*/
+
+#include "typedefs.h"   /* to get Condat data types */
+#include "vsi.h"        /* to get a lot of macros */
+#include "macdef.h"
+#include "gprs.h"
+#include "gsm.h"        /* to get a lot of macros */
+#include "cnf_llc.h"    /* to get cnf-definitions */
+#include "mon_llc.h"    /* to get mon-definitions */
+#include "prim.h"       /* to get the definitions of used SAP and directions */
+#include "llc.h"        /* to get the global entity definitions */
+
+#include "llc_itxf.h"   /* to get local function definitions */
+#include "llc_llmes.h"  /* to get LLME signal definitions */
+#include "llc_irxs.h"   /* to get ITX signal definitions */
+
+
+/*==== CONST ================================================================*/
+
+/*==== LOCAL VARS ===========================================================*/
+
+/*==== PRIVATE FUNCTIONS ====================================================*/
+
+/*==== PUBLIC FUNCTIONS =====================================================*/
+
+
+/*
++------------------------------------------------------------------------------
+| Function    : itx_T201_start
++------------------------------------------------------------------------------
+| Description : This procedure starts timer T201 for the current SAPI. 
+|
+| Parameters  : 
++------------------------------------------------------------------------------
+*/
+GLOBAL void itx_T201_start (T_TIME length)
+{
+  TRACE_FUNCTION( "itx_T201_start" );
+
+  /*
+   * Start timer T201 for the current SAPI.
+   */
+#ifdef _SIMULATION_
+  /*
+   * In simulation mode, use always a timer value of 5 seconds.
+   */
+  vsi_t_start (VSI_CALLER
+    (USHORT)(TIMER_T201_BASE + IMAP(llc_data->current_sapi)), 5000);
+#else
+  vsi_t_start (VSI_CALLER
+    (USHORT)(TIMER_T201_BASE + IMAP(llc_data->current_sapi)), length);
+#endif /* _SIMULATION_ */
+
+  return;
+} /* itx_T201_start() */
+
+
+/*
++------------------------------------------------------------------------------
+| Function    : itx_T201_stop
++------------------------------------------------------------------------------
+| Description : This procedure stops timer T201 for the current SAPI. 
+|
+| Parameters  : 
++------------------------------------------------------------------------------
+*/
+GLOBAL void itx_T201_stop (void)
+{
+  TRACE_FUNCTION( "itx_T201_stop" );
+
+  /*
+   * Stops timer T201 for the current SAPI.
+   */
+  vsi_t_stop (VSI_CALLER 
+    (USHORT)(TIMER_T201_BASE + IMAP(llc_data->current_sapi)));
+
+  return;
+} /* itx_T201_stop() */
+
+
+
+/*
++------------------------------------------------------------------------------
+| Function    : itx_timer_t201
++------------------------------------------------------------------------------
+| Description : Handles expiry of timer T201. This function is called from
+|               pei_timeout().
+|
+| Parameters  : sapi - indicates the SAPI for which the timer has expired
+|
++------------------------------------------------------------------------------
+*/
+GLOBAL void itx_timer_t201 (UBYTE sapi)
+{ 
+  TRACE_FUNCTION( "itx_timer_t201" );
+  
+  TRACE_0_INFO("T201 EXPIRED" );
+
+  SWITCH_LLC (sapi);
+
+  switch (GET_STATE(ITX))
+  {
+    case ITX_ABM:
+      /*
+       * If a frame is associated with T201, increment the 
+       * retransmission counter and if below N200, restart 
+       * T201. Else initate the ABM-Re-Establish procedure.
+       */
+      if ( llc_data->itx->t201_entry != NULL)
+      {
+        llc_data->itx->t201_entry->status = IQ_RETR_FRAME;
+
+        if ( llc_data->itx->t201_entry->n_retr <= *(llc_data->n200) )
+        {
+          TIMERSTART (T201, llc_data->t200->length);
+          itx_send_next_frame (ABIT_SET_REQ);
+        }
+        else
+        {
+          /*
+           * Initate ABM Re-Establish procedure. The state change 
+           * will be done by the reestablish procedure later.
+           */
+          sig_itx_llme_reest_ind (LLGMM_ERRCS_ACK_NO_PEER_RES_REEST);
+        }
+      }
+      /* SET_STATE (ITX, SAME_STATE); */
+      break;
+
+    case ITX_ABM_PEER_BUSY:
+      /*
+       * If the Peer busy retransmission counter is below N200
+       * restart T201 and send an appropriated S frame. Else
+       * initate the ABM-Re-Establish procedure.
+       */
+      if ( llc_data->itx->n_pb_retr < *(llc_data->n200) )
+      {
+        TIMERSTART (T201, llc_data->t200->length);
+        sig_itx_irx_s_frame_req (ABIT_SET_REQ); 
+        llc_data->itx->n_pb_retr += 1;
+      }
+      else
+      {
+        sig_itx_llme_reest_ind (LLGMM_ERRCS_PEER_BUSY_REEST);
+      }
+      /* SET_STATE (ITX, SAME_STATE); */
+      break;
+
+    default:
+      TRACE_ERROR( "T201 unexpected" );
+      break;
+  }
+
+} /* itx_timer_t201() */