libxdas_api_read.c

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/*----------------------------------------------------------------------------
 * Copyright (c) 2006, Novell, Inc.
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are 
 * met:
 * 
 *     * Redistributions of source code must retain the above copyright 
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright 
 *       notice, this list of conditions and the following disclaimer in the 
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Novell nor the names of its contributors 
 *       may be used to endorse or promote products derived from this 
 *       software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *--------------------------------------------------------------------------*/

#include <xdas.h>
#include <xdas_debug.h>

#include "libxdas_impl.h"

#include <malloc.h>
#include <string.h>

/*---------------------------------------------------------------------------
 */
XDASXPC int XDASAPI xdas_close_audit_stream(
      int * minor_status,
      xdas_audit_ref_t das_ref,
      xdas_audit_stream_t * audit_stream_ref)
{
   xdas_session * xs;
   xdas_stream * xt;
   int bit_bucket;

   /* check parameters */
   if (!minor_status)
      minor_status = &bit_bucket;
   *minor_status = 0;

   xdas_assert(das_ref != 0);
   if (das_ref == 0)
      return XDAS_S_CALL_INACCESSIBLE_READ | XDAS_S_INVALID_DAS_REF;

   xs = xdas_validate_session(das_ref);
   xdas_assert(xs != 0);
   if (xs == 0)
      return XDAS_S_CALL_BAD_STRUCTURE | XDAS_S_INVALID_DAS_REF;

   if (!xdas_session_has_rights(xs, XDAS_AUDIT_SERVICE | XDAS_AUDIT_READ))
      return XDAS_S_AUTHORIZATION_FAILURE;

   xdas_assert(audit_stream_ref != 0 && *audit_stream_ref != 0);
   if (audit_stream_ref == 0 || *audit_stream_ref == 0)
      return XDAS_S_CALL_INACCESSIBLE_READ | XDAS_S_INVALID_AUDIT_STREAM;

   xt = xdas_validate_stream(*audit_stream_ref);
   xdas_assert(xt != 0);
   if (xt == 0)
      return XDAS_S_CALL_BAD_STRUCTURE | XDAS_S_INVALID_AUDIT_STREAM;

   xdas_internal_close_audit_stream(xt);
   *audit_stream_ref = 0;
   return XDAS_S_NOT_SUPPORTED;
}

/*---------------------------------------------------------------------------
 */
XDASXPC int XDASAPI xdas_get_next(
      int * minor_status,
      xdas_audit_ref_t das_ref,
      xdas_audit_stream_t audit_stream_ref,
      unsigned max_records,
      xdas_buffer_t audit_record_buffer,
      unsigned * no_of_records)
{
   xdas_session * xs;
   xdas_stream * xt;
   int bit_bucket;

   /* check parameters */
   if (!minor_status)
      minor_status = &bit_bucket;
   *minor_status = 0;

   xdas_assert(das_ref != 0);
   if (das_ref == 0)
      return XDAS_S_CALL_INACCESSIBLE_READ | XDAS_S_INVALID_DAS_REF;

   xs = xdas_validate_session(das_ref);
   xdas_assert(xs != 0);
   if (xs == 0)
      return XDAS_S_CALL_BAD_STRUCTURE | XDAS_S_INVALID_DAS_REF;

   if (!xdas_session_has_rights(xs, XDAS_AUDIT_SERVICE | XDAS_AUDIT_READ))
      return XDAS_S_AUTHORIZATION_FAILURE;

   xdas_assert(audit_stream_ref != 0);
   if (audit_stream_ref == 0)
      return XDAS_S_CALL_INACCESSIBLE_READ | XDAS_S_INVALID_AUDIT_STREAM;

   xt = xdas_validate_stream(audit_stream_ref);
   xdas_assert(xt != 0);
   if (xt == 0)
      return XDAS_S_CALL_BAD_STRUCTURE | XDAS_S_INVALID_AUDIT_STREAM;

   return xdas_internal_get_next(minor_status, xt, max_records, 
         audit_record_buffer, no_of_records);
}

/*---------------------------------------------------------------------------
 */
XDASXPC int XDASAPI xdas_open_audit_stream(
      int * minor_status,
      xdas_audit_ref_t das_ref,
      xdas_audit_stream_t * audit_stream_ref)
{
   xdas_session * xs;
   xdas_stream * xt;
   int rv, bit_bucket;

   /* check parameters */
   if (!minor_status)
      minor_status = &bit_bucket;
   *minor_status = 0;

   xdas_assert(das_ref != 0);
   if (das_ref == 0)
      return XDAS_S_CALL_INACCESSIBLE_READ | XDAS_S_INVALID_DAS_REF;

   xs = xdas_validate_session(das_ref);
   xdas_assert(xs != 0);
   if (xs == 0)
      return XDAS_S_CALL_BAD_STRUCTURE | XDAS_S_INVALID_DAS_REF;

   if (!xdas_session_has_rights(xs, XDAS_AUDIT_SERVICE | XDAS_AUDIT_READ))
      return XDAS_S_AUTHORIZATION_FAILURE;

   xdas_assert(audit_stream_ref != 0);
   if (audit_stream_ref == 0)
      return XDAS_S_CALL_INACCESSIBLE_WRITE | XDAS_S_INVALID_AUDIT_STREAM;

   /* create a blank stream context structure */
   *audit_stream_ref = 0;
   if ((xt = (xdas_stream *)malloc(sizeof(*xt))) == 0)
      return (*minor_status = OXDAS_MS_OUT_OF_MEMORY), XDAS_S_FAILURE;
   memset(xt, 0, sizeof(*xt));
   xt->signature = XDAS_STREAM_SIG;

   if ((rv = xdas_internal_open_audit_stream(minor_status, 
         xs, xt)) != XDAS_S_COMPLETE)
      xdas_internal_close_audit_stream(xt);
   else
      *audit_stream_ref = (xdas_audit_stream_t)xt;

   return rv;
}

/*---------------------------------------------------------------------------
 */
XDASXPC int XDASAPI xdas_parse_record(
      int * minor_status,
      xdas_audit_ref_t das_ref,
      xdas_buffer_t audit_record_buffer,
      unsigned record_number,
      xdas_audit_record_t audit_record)
{
   xdas_session * xs;
   int bit_bucket;

   /* check parameters */
   if (!minor_status)
      minor_status = &bit_bucket;
   *minor_status = 0;

   xdas_assert(das_ref != 0);
   if (das_ref == 0)
      return XDAS_S_CALL_INACCESSIBLE_READ | XDAS_S_INVALID_DAS_REF;

   xs = xdas_validate_session(das_ref);
   xdas_assert(xs != 0);
   if (xs == 0)
      return XDAS_S_CALL_BAD_STRUCTURE | XDAS_S_INVALID_DAS_REF;

   if (!xdas_session_has_rights(xs, XDAS_AUDIT_SERVICE | XDAS_AUDIT_READ))
      return XDAS_S_AUTHORIZATION_FAILURE;

   return xdas_internal_parse_record(minor_status, audit_record_buffer, 
         record_number, audit_record);
}

/*---------------------------------------------------------------------------
 */
XDASXPC int XDASAPI xdas_rewind_audit_stream(
      int * minor_status,
      xdas_audit_ref_t das_ref,
      xdas_audit_stream_t audit_stream_ref)
{
   xdas_session * xs;
   xdas_stream * xt;
   int bit_bucket;

   /* check parameters */
   if (!minor_status)
      minor_status = &bit_bucket;
   *minor_status = 0;

   xdas_assert(das_ref != 0);
   if (das_ref == 0)
      return XDAS_S_CALL_INACCESSIBLE_READ | XDAS_S_INVALID_DAS_REF;

   xs = xdas_validate_session(das_ref);
   xdas_assert(xs != 0);
   if (xs == 0)
      return XDAS_S_CALL_BAD_STRUCTURE | XDAS_S_INVALID_DAS_REF;

   if (!xdas_session_has_rights(xs, XDAS_AUDIT_SERVICE | XDAS_AUDIT_READ))
      return XDAS_S_AUTHORIZATION_FAILURE;

   xdas_assert(audit_stream_ref != 0);
   if (audit_stream_ref == 0)
      return XDAS_S_CALL_INACCESSIBLE_READ | XDAS_S_INVALID_AUDIT_STREAM;

   xt = xdas_validate_stream(audit_stream_ref);
   xdas_assert(xt != 0);
   if (xt == 0)
      return XDAS_S_CALL_BAD_STRUCTURE | XDAS_S_INVALID_AUDIT_STREAM;

   return xdas_internal_rewind_audit_stream(minor_status, xt);
}