bsm_socket_type.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 2008 Apple Inc.
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1.  Redistributions of source code must retain the above copyright
   11  *     notice, this list of conditions and the following disclaimer.
   12  * 2.  Redistributions in binary form must reproduce the above copyright
   13  *     notice, this list of conditions and the following disclaimer in the
   14  *     documentation and/or other materials provided with the distribution.
   15  * 3.  Neither the name of Apple Inc. ("Apple") nor the names of
   16  *     its contributors may be used to endorse or promote products derived
   17  *     from this software without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR
   23  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   27  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
   28  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   29  * POSSIBILITY OF SUCH DAMAGE. 
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 __FBSDID("$FreeBSD$");
   34 
   35 #include <sys/param.h>
   36 #include <sys/socket.h>
   37 
   38 #include <security/audit/audit.h>
   39 
   40 #include <bsm/audit_record.h>
   41 #include <bsm/audit_socket_type.h>
   42 
   43 struct bsm_socket_type {
   44         u_short bst_bsm_socket_type;
   45         int     bst_local_socket_type;
   46 };
   47 
   48 #define ST_NO_LOCAL_MAPPING     -600
   49 
   50 static const struct bsm_socket_type bsm_socket_types[] = {
   51         { BSM_SOCK_DGRAM, SOCK_DGRAM },
   52         { BSM_SOCK_STREAM, SOCK_STREAM },
   53         { BSM_SOCK_RAW, SOCK_RAW },
   54         { BSM_SOCK_RDM, SOCK_RDM },
   55         { BSM_SOCK_SEQPACKET, SOCK_SEQPACKET },
   56 };
   57 static const int bsm_socket_types_count = nitems(bsm_socket_types);
   58 
   59 static const struct bsm_socket_type *
   60 bsm_lookup_local_socket_type(int local_socket_type)
   61 {
   62         int i;
   63 
   64         for (i = 0; i < bsm_socket_types_count; i++) {
   65                 if (bsm_socket_types[i].bst_local_socket_type ==
   66                     local_socket_type)
   67                         return (&bsm_socket_types[i]);
   68         }
   69         return (NULL);
   70 }
   71 
   72 u_short
   73 au_socket_type_to_bsm(int local_socket_type)
   74 {
   75         const struct bsm_socket_type *bstp;
   76 
   77         bstp = bsm_lookup_local_socket_type(local_socket_type);
   78         if (bstp == NULL)
   79                 return (BSM_SOCK_UNKNOWN);
   80         return (bstp->bst_bsm_socket_type);
   81 }
   82 
   83 static const struct bsm_socket_type *
   84 bsm_lookup_bsm_socket_type(u_short bsm_socket_type)
   85 {
   86         int i;
   87 
   88         for (i = 0; i < bsm_socket_types_count; i++) {
   89                 if (bsm_socket_types[i].bst_bsm_socket_type ==
   90                     bsm_socket_type)
   91                         return (&bsm_socket_types[i]);
   92         }
   93         return (NULL);
   94 }
   95 
   96 int
   97 au_bsm_to_socket_type(u_short bsm_socket_type, int *local_socket_typep)
   98 {
   99         const struct bsm_socket_type *bstp;
  100 
  101         bstp = bsm_lookup_bsm_socket_type(bsm_socket_type);
  102         if (bstp == NULL || bstp->bst_local_socket_type)
  103                 return (-1);
  104         *local_socket_typep = bstp->bst_local_socket_type;
  105         return (0);
  106 }

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FreeBSD/Linux Kernel Cross Reference sys/security/audit/bsm_socket_type.c

FreeBSD/Linux Kernel Cross Reference
sys/security/audit/bsm_socket_type.c