The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/bsm/audit_internal.h

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    1 /*-
    2  * Copyright (c) 2005-2008 Apple Inc.
    3  * Copyright (c) 2005 SPARTA, Inc.
    4  * All rights reserved.
    5  *
    6  * This code was developed in part by Robert N. M. Watson, Senior Principal
    7  * Scientist, SPARTA, Inc.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  *
   13  * 1.  Redistributions of source code must retain the above copyright
   14  *     notice, this list of conditions and the following disclaimer.
   15  * 2.  Redistributions in binary form must reproduce the above copyright
   16  *     notice, this list of conditions and the following disclaimer in the
   17  *     documentation and/or other materials provided with the distribution.
   18  * 3.  Neither the name of Apple Inc. ("Apple") nor the names of
   19  *     its contributors may be used to endorse or promote products derived
   20  *     from this software without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
   23  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   24  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   25  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
   26  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   27  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   29  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   32  *
   33  * $FreeBSD: releng/11.2/sys/bsm/audit_internal.h 331722 2018-03-29 02:50:57Z eadler $
   34  */
   35 
   36 #ifndef _AUDIT_INTERNAL_H
   37 #define _AUDIT_INTERNAL_H
   38 
   39 #if defined(__linux__) && !defined(__unused)
   40 #define __unused
   41 #endif
   42 
   43 /*
   44  * audit_internal.h contains private interfaces that are shared by user space
   45  * and the kernel for the purposes of assembling audit records.  Applications
   46  * should not include this file or use the APIs found within, or it may be
   47  * broken with future releases of OpenBSM, which may delete, modify, or
   48  * otherwise break these interfaces or the assumptions they rely on.
   49  */
   50 struct au_token {
   51         u_char                  *t_data;
   52         size_t                   len;
   53         TAILQ_ENTRY(au_token)    tokens;
   54 };
   55 
   56 struct au_record {
   57         char                     used;          /* Record currently in use? */
   58         int                      desc;          /* Descriptor for record. */
   59         TAILQ_HEAD(, au_token)   token_q;       /* Queue of BSM tokens. */
   60         u_char                  *data;
   61         size_t                   len;
   62         LIST_ENTRY(au_record)    au_rec_q;
   63 };
   64 typedef struct au_record        au_record_t;
   65 
   66 
   67 /*
   68  * We could determined the header and trailer sizes by defining appropriate
   69  * structures.  We hold off that approach until we have a consistent way of
   70  * using structures for all tokens.  This is not straightforward since these
   71  * token structures may contain pointers of whose contents we do not know the
   72  * size (e.g text tokens).
   73  */
   74 #define AUDIT_HEADER_EX_SIZE(a) ((a)->ai_termid.at_type+18+sizeof(u_int32_t))
   75 #define AUDIT_HEADER_SIZE       18
   76 #define MAX_AUDIT_HEADER_SIZE   (5*sizeof(u_int32_t)+18)
   77 #define AUDIT_TRAILER_SIZE      7
   78 
   79 /*
   80  * BSM token streams store fields in big endian byte order, so as to be
   81  * portable; when encoding and decoding, we must convert byte orders for
   82  * typed values.
   83  */
   84 #define ADD_U_CHAR(loc, val)                                            \
   85         do {                                                            \
   86                 *(loc) = (val);                                         \
   87                 (loc) += sizeof(u_char);                                \
   88         } while(0)
   89 
   90 
   91 #define ADD_U_INT16(loc, val)                                           \
   92         do {                                                            \
   93                 be16enc((loc), (val));                                  \
   94                 (loc) += sizeof(u_int16_t);                             \
   95         } while(0)
   96 
   97 #define ADD_U_INT32(loc, val)                                           \
   98         do {                                                            \
   99                 be32enc((loc), (val));                                  \
  100                 (loc) += sizeof(u_int32_t);                             \
  101         } while(0)
  102 
  103 #define ADD_U_INT64(loc, val)                                           \
  104         do {                                                            \
  105                 be64enc((loc), (val));                                  \
  106                 (loc) += sizeof(u_int64_t);                             \
  107         } while(0)
  108 
  109 #define ADD_MEM(loc, data, size)                                        \
  110         do {                                                            \
  111                 memcpy((loc), (data), (size));                          \
  112                 (loc) += size;                                          \
  113         } while(0)
  114 
  115 #define ADD_STRING(loc, data, size)     ADD_MEM(loc, data, size)
  116 
  117 #endif /* !_AUDIT_INTERNAL_H_ */

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