/* * 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_reference.c,v 1.13 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 */ #include <sys/cdefs.h> #if defined(LIBC_SCCS) && !defined(lint) static char *sccsid = "@(#)xdr_reference.c 1.11 87/08/11 SMI"; static char *sccsid = "@(#)xdr_reference.c 2.1 88/07/29 4.0 RPCSRC"; static char *rcsid = "$FreeBSD: src/lib/libc/xdr/xdr_reference.c,v 1.11 2002/03/22 21:53:26 obrien Exp $"; #endif #include <sys/cdefs.h> #include <assert.h> /* * xdr_reference.c, Generic XDR routines impelmentation. * * Copyright (C) 1987, Sun Microsystems, Inc. * * These are the "non-trivial" xdr primitives used to serialize and de-serialize * "pointers". See xdr.h for more info on the interface to xdr. */ #include <err.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include "sec_xdr.h" /* * XDR an indirect pointer * xdr_reference is for recursively translating a structure that is * referenced by a pointer inside the structure that is currently being * translated. pp references a pointer to storage. If *pp is null * the necessary storage is allocated. * size is the sizeof the referneced structure. * proc is the routine to handle the referenced structure. */ bool_t sec_xdr_reference(XDR *xdrs, uint8_t **pp, u_int size, xdrproc_t proc) { uint8_t *loc = pp ? *pp : NULL; bool_t stat; if (size > 1024) { // Structure suspiciously large: 1024 is arbitrary upper bound // for struct sizes (non-nested size) assert(FALSE); return (FALSE); } uint8_t obj[size]; bool_t sizeof_alloc = sec_xdr_arena_size_allocator(xdrs); if (loc == NULL) switch (xdrs->x_op) { case XDR_FREE: return (TRUE); case XDR_DECODE: { if (!sec_mem_alloc(xdrs, size, &loc)) return (FALSE); if (!loc) { memset(obj, 0, size); loc = &obj[0]; } if (!sizeof_alloc) *pp = loc; break; } case XDR_ENCODE: break; } stat = (*proc)(xdrs, loc); if (xdrs->x_op == XDR_FREE) { sec_mem_free(xdrs, loc, size); *pp = NULL; } return (stat); } bool_t sec_xdr_pointer(XDR *xdrs, uint8_t **objpp, u_int obj_size, xdrproc_t xdr_obj) { bool_t more_data; more_data = (objpp ? (*objpp != NULL) : FALSE); if (! xdr_bool(xdrs,&more_data)) return (FALSE); bool_t sizeof_alloc = sec_xdr_arena_size_allocator(xdrs); if (! more_data) { if ((xdrs->x_op == XDR_DECODE) && !sizeof_alloc) *objpp = NULL; return (TRUE); } return (sec_xdr_reference(xdrs,objpp,obj_size,xdr_obj)); } /** * 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* */