rpc.subproj/xdr_array.c

   1 /*
   2  * Copyright (c) 1999-2018 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.1 (the "License").  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License.
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24
  25 /*      $NetBSD: xdr_array.c,v 1.12 2000/01/22 22:19:18 mycroft Exp $   */
  26
  27 /*
  28  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
  29  * unrestricted use provided that this legend is included on all tape
  30  * media and as a part of the software program in whole or part.  Users
  31  * may copy or modify Sun RPC without charge, but are not authorized
  32  * to license or distribute it to anyone else except as part of a product or
  33  * program developed by the user.
  34  *
  35  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  36  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  37  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  38  *
  39  * Sun RPC is provided with no support and without any obligation on the
  40  * part of Sun Microsystems, Inc. to assist in its use, correction,
  41  * modification or enhancement.
  42  *
  43  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  44  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  45  * OR ANY PART THEREOF.
  46  *
  47  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  48  * or profits or other special, indirect and consequential damages, even if
  49  * Sun has been advised of the possibility of such damages.
  50  *
  51  * Sun Microsystems, Inc.
  52  * 2550 Garcia Avenue
  53  * Mountain View, California  94043
  54  */
  55
  56 #if defined(LIBC_SCCS) && !defined(lint)
  57 static char *sccsid = "@(#)xdr_array.c 1.10 87/08/11 Copyr 1984 Sun Micro";
  58 static char *sccsid = "@(#)xdr_array.c  2.1 88/07/29 4.0 RPCSRC";
  59 #endif
  60 #include <sys/cdefs.h>
  61
  62 /*
  63  * xdr_array.c, Generic XDR routines impelmentation.
  64  *
  65  * Copyright (C) 1984, Sun Microsystems, Inc.
  66  *
  67  * These are the "non-trivial" xdr primitives used to serialize and de-serialize
  68  * arrays.  See xdr.h for more info on the interface to xdr.
  69  */
  70
  71 #include "libinfo_common.h"
  72
  73 #include <err.h>
  74 #include <limits.h>
  75 #include <stdio.h>
  76 #include <stdlib.h>
  77 #include <string.h>
  78
  79 #include <rpc/types.h>
  80 #include <rpc/xdr.h>
  81
  82 /*
  83  * XDR an array of arbitrary elements
  84  * *addrp is a pointer to the array, *sizep is the number of elements.
  85  * If addrp is NULL (*sizep * elsize) bytes are allocated.
  86  * elsize is the size (in bytes) of each element, and elproc is the
  87  * xdr procedure to call to handle each element of the array.
  88  */
  89 LIBINFO_EXPORT
  90 bool_t
  91 xdr_array(xdrs, addrp, sizep, maxsize, elsize, elproc)
  92         XDR *xdrs;
  93         caddr_t *addrp;         /* array pointer */
  94         u_int *sizep;           /* number of elements */
  95         u_int maxsize;          /* max numberof elements */
  96         u_int elsize;           /* size in bytes of each element */
  97         xdrproc_t elproc;       /* xdr routine to handle each element */
  98 {
  99         u_int i;
 100         caddr_t target = *addrp;
 101         u_int c;  /* the actual element count */
 102         bool_t stat = TRUE;
 103         u_int nodesize;
 104
 105         /* like strings, arrays are really counted arrays */
 106         if (!xdr_u_int(xdrs, sizep)) {
 107                 return (FALSE);
 108         }
 109         c = *sizep;
 110         if ((c > maxsize || UINT_MAX/elsize < c) &&
 111             (xdrs->x_op != XDR_FREE)) {
 112                 return (FALSE);
 113         }
 114         nodesize = c * elsize;
 115
 116         /*
 117          * if we are deserializing, we may need to allocate an array.
 118          * We also save time by checking for a null array if we are freeing.
 119          */
 120         if (target == NULL)
 121                 switch (xdrs->x_op) {
 122                 case XDR_DECODE:
 123                         if (c == 0)
 124                                 return (TRUE);
 125                         *addrp = target = mem_alloc(nodesize);
 126                         if (target == NULL) {
 127                                 warnx("xdr_array: out of memory");
 128                                 return (FALSE);
 129                         }
 130                         memset(target, 0, nodesize);
 131                         break;
 132
 133                 case XDR_FREE:
 134                         return (TRUE);
 135
 136                 case XDR_ENCODE:
 137                         break;
 138         }
 139
 140         /*
 141          * now we xdr each element of array
 142          */
 143         for (i = 0; (i < c) && stat; i++) {
 144                 stat = (*elproc)(xdrs, target, 0);
 145                 target += elsize;
 146         }
 147
 148         /*
 149          * the array may need freeing
 150          */
 151         if (xdrs->x_op == XDR_FREE) {
 152                 mem_free(*addrp, nodesize);
 153                 *addrp = NULL;
 154         }
 155         return (stat);
 156 }
 157
 158 /*
 159  * xdr_vector():
 160  *
 161  * XDR a fixed length array. Unlike variable-length arrays,
 162  * the storage of fixed length arrays is static and unfreeable.
 163  * > basep: base of the array
 164  * > size: size of the array
 165  * > elemsize: size of each element
 166  * > xdr_elem: routine to XDR each element
 167  */
 168 LIBINFO_EXPORT
 169 bool_t
 170 xdr_vector(xdrs, basep, nelem, elemsize, xdr_elem)
 171         XDR *xdrs;
 172         char *basep;
 173         u_int nelem;
 174         u_int elemsize;
 175         xdrproc_t xdr_elem;
 176 {
 177         u_int i;
 178         char *elptr;
 179
 180         elptr = basep;
 181         for (i = 0; i < nelem; i++) {
 182                 if (!(*xdr_elem)(xdrs, elptr, 0)) {
 183                         return(FALSE);
 184                 }
 185                 elptr += elemsize;
 186         }
 187         return(TRUE);
 188 }