1 /* $NetBSD: xdr_array.c,v 1.17 2012/06/25 22:32:45 abs Exp $ */ 2 3 /* 4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5 * unrestricted use provided that this legend is included on all tape 6 * media and as a part of the software program in whole or part. Users 7 * may copy or modify Sun RPC without charge, but are not authorized 8 * to license or distribute it to anyone else except as part of a product or 9 * program developed by the user. 10 * 11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14 * 15 * Sun RPC is provided with no support and without any obligation on the 16 * part of Sun Microsystems, Inc. to assist in its use, correction, 17 * modification or enhancement. 18 * 19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21 * OR ANY PART THEREOF. 22 * 23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24 * or profits or other special, indirect and consequential damages, even if 25 * Sun has been advised of the possibility of such damages. 26 * 27 * Sun Microsystems, Inc. 28 * 2550 Garcia Avenue 29 * Mountain View, California 94043 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 #if 0 35 static char *sccsid = "@(#)xdr_array.c 1.10 87/08/11 Copyr 1984 Sun Micro"; 36 static char *sccsid = "@(#)xdr_array.c 2.1 88/07/29 4.0 RPCSRC"; 37 #else 38 __RCSID("$NetBSD: xdr_array.c,v 1.17 2012/06/25 22:32:45 abs Exp $"); 39 #endif 40 #endif 41 42 /* 43 * xdr_array.c, Generic XDR routines implementation. 44 * 45 * Copyright (C) 1984, Sun Microsystems, Inc. 46 * 47 * These are the "non-trivial" xdr primitives used to serialize and de-serialize 48 * arrays. See xdr.h for more info on the interface to xdr. 49 */ 50 51 #include "namespace.h" 52 53 #include <err.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <limits.h> 58 59 #include <rpc/types.h> 60 #include <rpc/xdr.h> 61 62 #ifdef __weak_alias 63 __weak_alias(xdr_array,_xdr_array) 64 __weak_alias(xdr_vector,_xdr_vector) 65 #endif 66 67 /* 68 * XDR an array of arbitrary elements 69 * *addrp is a pointer to the array, *sizep is the number of elements. 70 * If addrp is NULL (*sizep * elsize) bytes are allocated. 71 * elsize is the size (in bytes) of each element, and elproc is the 72 * xdr procedure to call to handle each element of the array. 73 */ 74 bool_t 75 xdr_array(XDR *xdrs, caddr_t *addrp, u_int *sizep, u_int maxsize, u_int elsize, 76 xdrproc_t elproc) 77 { 78 u_int i; 79 caddr_t target = *addrp; 80 u_int c; /* the actual element count */ 81 bool_t stat = TRUE; 82 u_int nodesize; 83 84 /* like strings, arrays are really counted arrays */ 85 if (!xdr_u_int(xdrs, sizep)) 86 return (FALSE); 87 88 c = *sizep; 89 if ((c > maxsize || UINT_MAX/elsize < c) && 90 (xdrs->x_op != XDR_FREE)) 91 return (FALSE); 92 nodesize = c * elsize; 93 94 /* 95 * if we are deserializing, we may need to allocate an array. 96 * We also save time by checking for a null array if we are freeing. 97 */ 98 if (target == NULL) 99 switch (xdrs->x_op) { 100 case XDR_DECODE: 101 if (c == 0) 102 return (TRUE); 103 *addrp = target = mem_alloc(nodesize); 104 if (target == NULL) { 105 warnx("xdr_array: out of memory"); 106 return (FALSE); 107 } 108 memset(target, 0, nodesize); 109 break; 110 111 case XDR_FREE: 112 return (TRUE); 113 114 case XDR_ENCODE: 115 break; 116 } 117 118 /* 119 * now we xdr each element of array 120 */ 121 for (i = 0; (i < c) && stat; i++) { 122 stat = (*elproc)(xdrs, target); 123 target += elsize; 124 } 125 126 /* 127 * the array may need freeing 128 */ 129 if (xdrs->x_op == XDR_FREE) { 130 mem_free(*addrp, nodesize); 131 *addrp = NULL; 132 } 133 return (stat); 134 } 135 136 /* 137 * xdr_vector(): 138 * 139 * XDR a fixed length array. Unlike variable-length arrays, 140 * the storage of fixed length arrays is static and unfreeable. 141 * > basep: base of the array 142 * > size: size of the array 143 * > elemsize: size of each element 144 * > xdr_elem: routine to XDR each element 145 */ 146 bool_t 147 xdr_vector(XDR *xdrs, char *basep, u_int nelem, u_int elemsize, 148 xdrproc_t xdr_elem) 149 { 150 u_int i; 151 char *elptr; 152 153 elptr = basep; 154 for (i = 0; i < nelem; i++) { 155 if (!(*xdr_elem)(xdrs, elptr)) { 156 return(FALSE); 157 } 158 elptr += elemsize; 159 } 160 return(TRUE); 161 } 162