1 /* $NetBSD: xdr_array.c,v 1.12 2000/01/22 22:19:18 mycroft 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 #if defined(LIBC_SCCS) && !defined(lint) 33 static char *sccsid2 = "@(#)xdr_array.c 1.10 87/08/11 Copyr 1984 Sun Micro"; 34 static char *sccsid = "@(#)xdr_array.c 2.1 88/07/29 4.0 RPCSRC"; 35 #endif 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 /* 40 * xdr_array.c, Generic XDR routines implementation. 41 * 42 * Copyright (C) 1984, Sun Microsystems, Inc. 43 * 44 * These are the "non-trivial" xdr primitives used to serialize and de-serialize 45 * arrays. See xdr.h for more info on the interface to xdr. 46 */ 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/limits.h> 51 #include <sys/malloc.h> 52 53 #include <rpc/types.h> 54 #include <rpc/xdr.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 bool_t 64 xdr_array(XDR *xdrs, 65 caddr_t *addrp, /* array pointer */ 66 u_int *sizep, /* number of elements */ 67 u_int maxsize, /* max numberof elements */ 68 u_int elsize, /* size in bytes of each element */ 69 xdrproc_t elproc) /* xdr routine to handle each element */ 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 printf("xdr_array: out of memory"); 100 return (FALSE); 101 } 102 memset(target, 0, nodesize); 103 break; 104 105 case XDR_FREE: 106 return (TRUE); 107 108 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); 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)) { 150 return(FALSE); 151 } 152 elptr += elemsize; 153 } 154 return(TRUE); 155 } 156