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

     /*-
      * SPDX-License-Identifier: BSD-3-Clause
      *
      * Copyright (c) 2005-2008 Apple Inc.
      * Copyright (c) 2005 SPARTA, Inc.
      * All rights reserved.
      *
      * This code was developed in part by Robert N. M. Watson, Senior Principal
      * Scientist, SPARTA, Inc.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     *
     * 1.  Redistributions of source code must retain the above copyright
     *     notice, this list of conditions and the following disclaimer.
     * 2.  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.
     * 3.  Neither the name of Apple Inc. ("Apple") 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 APPLE AND ITS 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 APPLE OR ITS 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.
     *
     * $FreeBSD: releng/12.0/sys/bsm/audit_internal.h 326023 2017-11-20 19:43:44Z pfg $
     */
    
    #ifndef _AUDIT_INTERNAL_H
    #define _AUDIT_INTERNAL_H
    
    #if defined(__linux__) && !defined(__unused)
    #define __unused
    #endif
    
    /*
     * audit_internal.h contains private interfaces that are shared by user space
     * and the kernel for the purposes of assembling audit records.  Applications
     * should not include this file or use the APIs found within, or it may be
     * broken with future releases of OpenBSM, which may delete, modify, or
     * otherwise break these interfaces or the assumptions they rely on.
     */
    struct au_token {
            u_char                  *t_data;
            size_t                   len;
            TAILQ_ENTRY(au_token)    tokens;
    };
    
    struct au_record {
            char                     used;          /* Record currently in use? */
            int                      desc;          /* Descriptor for record. */
            TAILQ_HEAD(, au_token)   token_q;       /* Queue of BSM tokens. */
            u_char                  *data;
            size_t                   len;
            LIST_ENTRY(au_record)    au_rec_q;
    };
    typedef struct au_record        au_record_t;
    
    
    /*
     * We could determined the header and trailer sizes by defining appropriate
     * structures.  We hold off that approach until we have a consistent way of
     * using structures for all tokens.  This is not straightforward since these
     * token structures may contain pointers of whose contents we do not know the
     * size (e.g text tokens).
     */
    #define AUDIT_HEADER_EX_SIZE(a) ((a)->ai_termid.at_type+18+sizeof(u_int32_t))
    #define AUDIT_HEADER_SIZE       18
    #define MAX_AUDIT_HEADER_SIZE   (5*sizeof(u_int32_t)+18)
    #define AUDIT_TRAILER_SIZE      7
    
    /*
     * BSM token streams store fields in big endian byte order, so as to be
     * portable; when encoding and decoding, we must convert byte orders for
     * typed values.
     */
    #define ADD_U_CHAR(loc, val)                                            \
            do {                                                            \
                    *(loc) = (val);                                         \
                    (loc) += sizeof(u_char);                                \
            } while(0)
    
    
    #define ADD_U_INT16(loc, val)                                           \
            do {                                                            \
                    be16enc((loc), (val));                                  \
                    (loc) += sizeof(u_int16_t);                             \
            } while(0)
    
    #define ADD_U_INT32(loc, val)                                           \
           do {                                                            \
                   be32enc((loc), (val));                                  \
                   (loc) += sizeof(u_int32_t);                             \
           } while(0)
   
   #define ADD_U_INT64(loc, val)                                           \
           do {                                                            \
                   be64enc((loc), (val));                                  \
                   (loc) += sizeof(u_int64_t);                             \
           } while(0)
   
   #define ADD_MEM(loc, data, size)                                        \
           do {                                                            \
                   memcpy((loc), (data), (size));                          \
                   (loc) += size;                                          \
           } while(0)
   
   #define ADD_STRING(loc, data, size)     ADD_MEM(loc, data, size)
   
   #endif /* !_AUDIT_INTERNAL_H_ */

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