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 1.3 2004/10/25 19:38:02 drhodus 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 bool_t 61 xdr_array(xdrs, addrp, sizep, maxsize, elsize, elproc) 62 XDR *xdrs; 63 caddr_t *addrp; /* array pointer */ 64 u_int *sizep; /* number of elements */ 65 u_int maxsize; /* max numberof elements */ 66 u_int elsize; /* size in bytes of each element */ 67 xdrproc_t elproc; /* xdr routine to handle each element */ 68 { 69 u_int i; 70 caddr_t target = *addrp; 71 u_int c; /* the actual element count */ 72 bool_t stat = TRUE; 73 u_int nodesize; 74 75 /* like strings, arrays are really counted arrays */ 76 if (!xdr_u_int(xdrs, sizep)) { 77 return (FALSE); 78 } 79 c = *sizep; 80 if ((c > maxsize || UINT_MAX/elsize < c) && 81 (xdrs->x_op != XDR_FREE)) { 82 return (FALSE); 83 } 84 nodesize = c * elsize; 85 86 /* 87 * if we are deserializing, we may need to allocate an array. 88 * We also save time by checking for a null array if we are freeing. 89 */ 90 if (target == NULL) 91 switch (xdrs->x_op) { 92 case XDR_DECODE: 93 if (c == 0) 94 return (TRUE); 95 *addrp = target = mem_alloc(nodesize); 96 if (target == NULL) { 97 (void) fprintf(stderr, 98 "xdr_array: out of memory\n"); 99 return (FALSE); 100 } 101 memset(target, 0, nodesize); 102 break; 103 104 case XDR_FREE: 105 return (TRUE); 106 } 107 108 /* 109 * now we xdr each element of array 110 */ 111 for (i = 0; (i < c) && stat; i++) { 112 stat = (*elproc)(xdrs, target, LASTUNSIGNED); 113 target += elsize; 114 } 115 116 /* 117 * the array may need freeing 118 */ 119 if (xdrs->x_op == XDR_FREE) { 120 mem_free(*addrp, nodesize); 121 *addrp = NULL; 122 } 123 return (stat); 124 } 125 126 /* 127 * xdr_vector(): 128 * 129 * XDR a fixed length array. Unlike variable-length arrays, 130 * the storage of fixed length arrays is static and unfreeable. 131 * > basep: base of the array 132 * > size: size of the array 133 * > elemsize: size of each element 134 * > xdr_elem: routine to XDR each element 135 */ 136 bool_t 137 xdr_vector(xdrs, basep, nelem, elemsize, xdr_elem) 138 XDR *xdrs; 139 char *basep; 140 u_int nelem; 141 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