/* * Copyright (c) 2006 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* $NetBSD: xdr_array.c,v 1.12 2000/01/22 22:19:18 mycroft Exp $ */ /* * Sun RPC is a product of Sun Microsystems, Inc. and is provided for * unrestricted use provided that this legend is included on all tape * media and as a part of the software program in whole or part. Users * may copy or modify Sun RPC without charge, but are not authorized * to license or distribute it to anyone else except as part of a product or * program developed by the user. * * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. * * Sun RPC is provided with no support and without any obligation on the * part of Sun Microsystems, Inc. to assist in its use, correction, * modification or enhancement. * * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC * OR ANY PART THEREOF. * * In no event will Sun Microsystems, Inc. be liable for any lost revenue * or profits or other special, indirect and consequential damages, even if * Sun has been advised of the possibility of such damages. * * Sun Microsystems, Inc. * 2550 Garcia Avenue * Mountain View, California 94043 */ #if defined(LIBC_SCCS) && !defined(lint) static char *sccsid = "@(#)xdr_array.c 1.10 87/08/11 Copyr 1984 Sun Micro"; static char *sccsid = "@(#)xdr_array.c 2.1 88/07/29 4.0 RPCSRC"; #endif #include <sys/cdefs.h> /* * xdr_array.c, Generic XDR routines impelmentation. * * Copyright (C) 1984, Sun Microsystems, Inc. * * These are the "non-trivial" xdr primitives used to serialize and de-serialize * arrays. See xdr.h for more info on the interface to xdr. */ #include <err.h> #include <limits.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <assert.h> #include "sec_xdr.h" /* * XDR an array of arbitrary elements * *addrp is a pointer to the array, *sizep is the number of elements. * If addrp is NULL (*sizep * elsize) bytes are allocated. * elsize is the size (in bytes) of each element, and elproc is the * xdr procedure to call to handle each element of the array. */ bool_t sec_xdr_array(XDR *xdrs, uint8_t **addrp, u_int *sizep, u_int maxsize, u_int elsize, xdrproc_t elproc) { u_int i; bool_t stat = TRUE; u_int c = sizep ? *sizep : 0; /* the actual element count */ /* like strings, arrays are really counted arrays */ if (!xdr_u_int(xdrs, &c)) return (FALSE); if (sizep && (xdrs->x_op == XDR_DECODE)) *sizep = c; // XXX/cs on decode if c == 0 return if ((c > maxsize || UINT_MAX/elsize < c) && (xdrs->x_op != XDR_FREE)) return (FALSE); if (elsize > 1024) { // Structure suspiciously large: 1024 is arbitrary upper bound // for struct sizes (non-nested size) assert(FALSE); return (FALSE); } u_int nodesize = c * elsize; uint8_t *target = addrp ? *addrp : NULL; uint8_t obj[elsize]; bool_t sizeof_alloc = sec_xdr_arena_size_allocator(xdrs); /* * if we are deserializing, we may need to allocate an array. * We also save time by checking for a null array if we are freeing. */ if (target == NULL) { switch (xdrs->x_op) { case XDR_DECODE: if (c == 0) return (TRUE); if (!sec_mem_alloc(xdrs, nodesize, &target)) return (FALSE); if (!target) target = &obj[0]; if (!sizeof_alloc) *addrp = target; break; case XDR_FREE: return (TRUE); case XDR_ENCODE: break; } } /* * now we xdr each element of array */ for (i = 0; (i < c) && stat; i++) { if ((xdrs->x_op == XDR_DECODE) && sizeof_alloc) memset(obj, 0, elsize); stat = (*elproc)(xdrs, target); if ((xdrs->x_op == XDR_ENCODE) || !sizeof_alloc) target += elsize; } /* * the array may need freeing */ if (xdrs->x_op == XDR_FREE) { sec_mem_free(xdrs, *addrp, nodesize); *addrp = NULL; } return (stat); } /** * This is almost a straight copy of the standard implementation, except * that all calls made that allocate memory can defer to an alternate * mechanism, with the purpose to allocate from one block of memory on * *decode* */