1 /* 2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 3 * unrestricted use provided that this legend is included on all tape 4 * media and as a part of the software program in whole or part. Users 5 * may copy or modify Sun RPC without charge, but are not authorized 6 * to license or distribute it to anyone else except as part of a product or 7 * program developed by the user. 8 * 9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 12 * 13 * Sun RPC is provided with no support and without any obligation on the 14 * part of Sun Microsystems, Inc. to assist in its use, correction, 15 * modification or enhancement. 16 * 17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 19 * OR ANY PART THEREOF. 20 * 21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 22 * or profits or other special, indirect and consequential damages, even if 23 * Sun has been advised of the possibility of such damages. 24 * 25 * Sun Microsystems, Inc. 26 * 2550 Garcia Avenue 27 * Mountain View, California 94043 28 * 29 * @(#)xdr_array.c 1.10 87/08/11 Copyr 1984 Sun Micro 30 * @(#)xdr_array.c 2.1 88/07/29 4.0 RPCSRC 31 * $NetBSD: xdr_array.c,v 1.12 2000/01/22 22:19:18 mycroft Exp $ 32 * $FreeBSD: src/lib/libc/xdr/xdr_array.c,v 1.15 2004/10/16 06:32:43 obrien Exp $ 33 * $DragonFly: src/lib/libc/xdr/xdr_array.c,v 1.4 2005/12/05 00:47:57 swildner Exp $ 34 */ 35 36 /* 37 * xdr_array.c, Generic XDR routines impelmentation. 38 * 39 * Copyright (C) 1984, Sun Microsystems, Inc. 40 * 41 * These are the "non-trivial" xdr primitives used to serialize and de-serialize 42 * arrays. See xdr.h for more info on the interface to xdr. 43 */ 44 45 #include "namespace.h" 46 #include <err.h> 47 #include <limits.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 52 #include <rpc/types.h> 53 #include <rpc/xdr.h> 54 #include "un-namespace.h" 55 56 /* 57 * XDR an array of arbitrary elements 58 * *addrp is a pointer to the array, *sizep is the number of elements. 59 * If addrp is NULL (*sizep * elsize) bytes are allocated. 60 * elsize is the size (in bytes) of each element, and elproc is the 61 * xdr procedure to call to handle each element of the array. 62 * 63 * Parameters: 64 * addrp: array pointer 65 * sizep: number of elements 66 * maxsize: max number of elements 67 * elsize: size in bytes of each element 68 * elproc: xdr routine to handle each element 69 */ 70 bool_t 71 xdr_array(XDR *xdrs, caddr_t *addrp, u_int *sizep, u_int maxsize, u_int elsize, 72 xdrproc_t elproc) 73 { 74 u_int i; 75 caddr_t target = *addrp; 76 u_int c; /* the actual element count */ 77 bool_t stat = TRUE; 78 u_int nodesize; 79 80 /* like strings, arrays are really counted arrays */ 81 if (!xdr_u_int(xdrs, sizep)) { 82 return (FALSE); 83 } 84 c = *sizep; 85 if ((c > maxsize || UINT_MAX/elsize < c) && 86 (xdrs->x_op != XDR_FREE)) { 87 return (FALSE); 88 } 89 nodesize = c * elsize; 90 91 /* 92 * if we are deserializing, we may need to allocate an array. 93 * We also save time by checking for a null array if we are freeing. 94 */ 95 if (target == NULL) 96 switch (xdrs->x_op) { 97 case XDR_DECODE: 98 if (c == 0) 99 return (TRUE); 100 *addrp = target = mem_alloc(nodesize); 101 if (target == NULL) { 102 warnx("xdr_array: out of memory"); 103 return (FALSE); 104 } 105 memset(target, 0, nodesize); 106 break; 107 108 case XDR_FREE: 109 return (TRUE); 110 111 case XDR_ENCODE: 112 break; 113 } 114 115 /* 116 * now we xdr each element of array 117 */ 118 for (i = 0; (i < c) && stat; i++) { 119 stat = (*elproc)(xdrs, target); 120 target += elsize; 121 } 122 123 /* 124 * the array may need freeing 125 */ 126 if (xdrs->x_op == XDR_FREE) { 127 mem_free(*addrp, nodesize); 128 *addrp = NULL; 129 } 130 return (stat); 131 } 132 133 /* 134 * xdr_vector(): 135 * 136 * XDR a fixed length array. Unlike variable-length arrays, 137 * the storage of fixed length arrays is static and unfreeable. 138 * > basep: base of the array 139 * > size: size of the array 140 * > elemsize: size of each element 141 * > xdr_elem: routine to XDR each element 142 */ 143 bool_t 144 xdr_vector(XDR *xdrs, char *basep, u_int nelem, u_int elemsize, 145 xdrproc_t xdr_elem) 146 { 147 u_int i; 148 char *elptr; 149 150 elptr = basep; 151 for (i = 0; i < nelem; i++) { 152 if (!(*xdr_elem)(xdrs, elptr)) { 153 return(FALSE); 154 } 155 elptr += elemsize; 156 } 157 return(TRUE); 158 } 159