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 * $FreeBSD: src/lib/libc/xdr/xdr_array.c,v 1.8.2.3 2002/08/01 12:23:20 nectar Exp $ 32 * $DragonFly: src/lib/libc/xdr/xdr_array.c,v 1.4 2005/12/05 00:47:57 swildner Exp $ 33 */ 34 35 /* 36 * xdr_array.c, Generic XDR routines impelmentation. 37 * 38 * Copyright (C) 1984, Sun Microsystems, Inc. 39 * 40 * These are the "non-trivial" xdr primitives used to serialize and de-serialize 41 * arrays. See xdr.h for more info on the interface to xdr. 42 */ 43 44 #include <limits.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <rpc/types.h> 49 #include <rpc/xdr.h> 50 51 #define LASTUNSIGNED ((u_int) 0-1) 52 53 /* 54 * XDR an array of arbitrary elements 55 * *addrp is a pointer to the array, *sizep is the number of elements. 56 * If addrp is NULL (*sizep * elsize) bytes are allocated. 57 * elsize is the size (in bytes) of each element, and elproc is the 58 * xdr procedure to call to handle each element of the array. 59 * 60 * Parameters: 61 * addrp: array pointer 62 * sizep: number of elements 63 * maxsize: max number of elements 64 * elsize: size in bytes of each element 65 * elproc: xdr routine to handle each element 66 */ 67 bool_t 68 xdr_array(XDR *xdrs, caddr_t *addrp, u_int *sizep, u_int maxsize, u_int elsize, 69 xdrproc_t elproc) 70 { 71 u_int i; 72 caddr_t target = *addrp; 73 u_int c; /* the actual element count */ 74 bool_t stat = TRUE; 75 u_int nodesize; 76 77 /* like strings, arrays are really counted arrays */ 78 if (!xdr_u_int(xdrs, sizep)) { 79 return (FALSE); 80 } 81 c = *sizep; 82 if ((c > maxsize || UINT_MAX/elsize < c) && 83 (xdrs->x_op != XDR_FREE)) { 84 return (FALSE); 85 } 86 nodesize = c * elsize; 87 88 /* 89 * if we are deserializing, we may need to allocate an array. 90 * We also save time by checking for a null array if we are freeing. 91 */ 92 if (target == NULL) 93 switch (xdrs->x_op) { 94 case XDR_DECODE: 95 if (c == 0) 96 return (TRUE); 97 *addrp = target = mem_alloc(nodesize); 98 if (target == NULL) { 99 fprintf(stderr, 100 "xdr_array: out of memory\n"); 101 return (FALSE); 102 } 103 memset(target, 0, nodesize); 104 break; 105 106 case XDR_FREE: 107 return (TRUE); 108 case XDR_ENCODE: 109 break; 110 } 111 112 /* 113 * now we xdr each element of array 114 */ 115 for (i = 0; (i < c) && stat; i++) { 116 stat = (*elproc)(xdrs, target, LASTUNSIGNED); 117 target += elsize; 118 } 119 120 /* 121 * the array may need freeing 122 */ 123 if (xdrs->x_op == XDR_FREE) { 124 mem_free(*addrp, nodesize); 125 *addrp = NULL; 126 } 127 return (stat); 128 } 129 130 /* 131 * xdr_vector(): 132 * 133 * XDR a fixed length array. Unlike variable-length arrays, 134 * the storage of fixed length arrays is static and unfreeable. 135 * > basep: base of the array 136 * > size: size of the array 137 * > elemsize: size of each element 138 * > xdr_elem: routine to XDR each element 139 */ 140 bool_t 141 xdr_vector(XDR *xdrs, char *basep, u_int nelem, u_int elemsize, 142 xdrproc_t xdr_elem) 143 { 144 u_int i; 145 char *elptr; 146 147 elptr = basep; 148 for (i = 0; i < nelem; i++) { 149 if (!(*xdr_elem)(xdrs, elptr, LASTUNSIGNED)) { 150 return(FALSE); 151 } 152 elptr += elemsize; 153 } 154 return(TRUE); 155 } 156 157