view src/g23m-fad/t30/t30_muxs.c @ 516:1ed9de6c90bd

src/g23m-gsm/sms/sms_for.c: bogus malloc removed The new error handling code that was not present in TCS211 blob version contains a malloc call that is bogus for 3 reasons: 1) The memory allocation in question is not needed in the first place; 2) libc malloc is used instead of one of the firmware's proper ways; 3) The memory allocation is made inside a function and then never freed, i.e., a memory leak. This bug was caught in gcc-built FreeCalypso fw projects (Citrine and Selenite) because our gcc environment does not allow any use of libc malloc (any reference to malloc produces a link failure), but this code from TCS3.2 is wrong even for Magnetite: if this code path is executed repeatedly over a long time, the many small allocations made by this malloc call without a subsequent free will eventually exhaust the malloc heap provided by the TMS470 environment, malloc will start returning NULL, and the bogus code will treat it as an error. Because the memory allocation in question is not needed at all, the fix entails simply removing it.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 22 Jul 2018 06:04:49 +0000
parents 90eb61ecd093
children
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/*
+-----------------------------------------------------------------------------
|  Project :
|  Modul   :  J:\g23m-fad\t30\t30_muxs.c
+-----------------------------------------------------------------------------
|  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 processing
|             of incomming signals for the component T30
|             of the mobile station
+-----------------------------------------------------------------------------
*/

#ifndef T30_MUXS_C
#define T30_MUXS_C
#endif

#define ENTITY_T30

/*==== INCLUDES ===================================================*/

#include <string.h>
#include <stdlib.h>
#include <stddef.h>
#include "typedefs.h"
#include "pcm.h"
#include "vsi.h"
#include "macdef.h"
#include "pconst.cdg"
#include "mconst.cdg"
#include "message.h"
#include "ccdapi.h"
#include "custom.h"
#include "gsm.h"
#include "prim.h"
#include "cnf_t30.h"
#include "mon_t30.h"
#include "pei.h"
#include "tok.h"
#include "dti.h"      /* functionality of the dti library */
#include "t30.h"

/*==== CONST =======================================================*/

/*==== TYPES =======================================================*/

/*==== VAR EXPORT ==================================================*/

/*==== VAR LOCAL ===================================================*/

/*==== FUNCTIONS ===================================================*/

/*
+--------------------------------------------------------------------+
| PROJECT : GSM-F&D (8411)             MODULE  : T30_MUXS            |
| STATE   : code                       ROUTINE : sig_bcs_mux_bcs_req |
+--------------------------------------------------------------------+

  PURPOSE : Process signal BCS_REQ received from process BCS formatter.
            The signal requests to send BCS data to FAD.
*/

GLOBAL void sig_bcs_mux_bcs_req (T_FAD_DATA_REQ *fad_data_req)
{
  TRACE_FUNCTION ("sig_bcs_mux_bcs_req()");
  PACCESS        (fad_data_req);

  switch (GET_STATE (MUX))
  {
    case T30_MUX_BCS:
#ifdef KER_DEBUG_BCS
      ker_debug ("fad_data_req", fad_data_req->sdu.buf, (USHORT)(fad_data_req->sdu.l_buf >> 3));
#endif
      PSENDX (FAD, fad_data_req);
      break;

    default:
      PFREE (fad_data_req);
      break;
  }
}

/*
+--------------------------------------------------------------------+
| PROJECT : GSM-F&D (8411)             MODULE  : T30_MUXS            |
| STATE   : code                       ROUTINE : sig_ker_mux_mux_req |
+--------------------------------------------------------------------+

  PURPOSE : Process signal MUX_REQ received from process kernel.
            The signal switches the state of the multiplexer.
*/

GLOBAL void sig_ker_mux_mux_req (void)
{
  TRACE_FUNCTION ("sig_ker_mux_mux_req()");

  switch (GET_STATE (MUX))
  {
  case T30_MUX_OFF:
  case T30_MUX_BCS:
  case T30_MUX_MSG:
  {
    switch (t30_data->mux.mode)
    {
    case MUX_OFF:  SET_STATE (MUX, T30_MUX_OFF);  break;
    case MUX_BCS:  SET_STATE (MUX, T30_MUX_BCS);  break;
    case MUX_MSG:  SET_STATE (MUX, T30_MUX_MSG);  break;
    }
    break;
  }
  default:
    break;
  }
}

/*
+--------------------------------------------------------------------+
| PROJECT : GSM-F&D (8411)             MODULE  : T30_MUXS            |
| STATE   : code                       ROUTINE : sig_msg_mux_msg_req |
+--------------------------------------------------------------------+

  PURPOSE : Process signal MSG_REQ received from process msg-formatter.
            The signal requests to send msg-data to fad.
*/

GLOBAL void sig_msg_mux_msg_req (T_FAD_DATA_REQ *fad_data_req)
{
  TRACE_FUNCTION ("sig_msg_mux_msg_req()");
  PACCESS        (fad_data_req);

  switch (GET_STATE (MUX))
  {
    case T30_MUX_MSG:
    {
#ifdef KER_DEBUG_MSG
      ker_debug ("fad_data_req", fad_data_req->sdu.buf, (USHORT)(fad_data_req->sdu.l_buf >> 3));
#endif
      PSENDX (FAD, fad_data_req);
      t30_data->fad_data_req = NULL;
      break;
    }

    default:
    {
      PFREE (fad_data_req);
      break;
    }
  }
}