GATT: Handle too short Error Response PDU

#include "bt_utils.h"

#include "gatt_int.h"

#include "l2c_int.h"

#include "log/log.h"

#include "osi/include/osi.h"

#define GATT_WRITE_LONG_HDR_SIZE 5 /* 1 opcode + 2 handle + 2 offset */

  tGATT_VALUE* p_attr = (tGATT_VALUE*)p_clcb->p_attr_buf;

  GATT_TRACE_DEBUG("gatt_process_error_rsp ");

  if (len < 4) {

    android_errorWriteLog(0x534e4554, "79591688");

    GATT_TRACE_ERROR("Error response too short");

    // Specification does not clearly define what should happen if error

    // response is too short. General rule in BT Spec 5.0 Vol 3, Part F 3.4.1.1

    // is: "If an error code is received in the Error Response that is not

    // understood by the client, for example an error code that was reserved for

    // future use that is now being used in a future version of this

    // specification, then the Error Response shall still be considered to state

    // that the given request cannot be performed for an unknown reason."

    opcode = handle = 0;

    reason = 0x7F;

  } else {

    STREAM_TO_UINT8(opcode, p);

    STREAM_TO_UINT16(handle, p);

    STREAM_TO_UINT8(reason, p);

  }

  if (p_clcb->operation == GATTC_OPTYPE_DISCOVERY) {

    gatt_proc_disc_error_rsp(tcb, p_clcb, opcode, handle, reason);