1/* 2 * Copyright (c) 2006 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. Please obtain a copy of the License at 10 * http://www.opensource.apple.com/apsl/ and read it before using this 11 * file. 12 * 13 * The Original Code and all software distributed under the License are 14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 18 * Please see the License for the specific language governing rights and 19 * limitations under the License. 20 * 21 * @APPLE_LICENSE_HEADER_END@ 22 */ 23 24/* $NetBSD: xdr_reference.c,v 1.13 2000/01/22 22:19:18 mycroft Exp $ */ 25 26/* 27 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 28 * unrestricted use provided that this legend is included on all tape 29 * media and as a part of the software program in whole or part. Users 30 * may copy or modify Sun RPC without charge, but are not authorized 31 * to license or distribute it to anyone else except as part of a product or 32 * program developed by the user. 33 * 34 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 35 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 36 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 37 * 38 * Sun RPC is provided with no support and without any obligation on the 39 * part of Sun Microsystems, Inc. to assist in its use, correction, 40 * modification or enhancement. 41 * 42 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 43 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 44 * OR ANY PART THEREOF. 45 * 46 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 47 * or profits or other special, indirect and consequential damages, even if 48 * Sun has been advised of the possibility of such damages. 49 * 50 * Sun Microsystems, Inc. 51 * 2550 Garcia Avenue 52 * Mountain View, California 94043 53 */ 54 55#include <sys/cdefs.h> 56#if defined(LIBC_SCCS) && !defined(lint) 57static char *sccsid = "@(#)xdr_reference.c 1.11 87/08/11 SMI"; 58static char *sccsid = "@(#)xdr_reference.c 2.1 88/07/29 4.0 RPCSRC"; 59static char *rcsid = "$FreeBSD: src/lib/libc/xdr/xdr_reference.c,v 1.11 2002/03/22 21:53:26 obrien Exp $"; 60#endif 61#include <sys/cdefs.h> 62#include <assert.h> 63/* 64 * xdr_reference.c, Generic XDR routines impelmentation. 65 * 66 * Copyright (C) 1987, Sun Microsystems, Inc. 67 * 68 * These are the "non-trivial" xdr primitives used to serialize and de-serialize 69 * "pointers". See xdr.h for more info on the interface to xdr. 70 */ 71 72#include <err.h> 73#include <stdio.h> 74#include <stdlib.h> 75#include <string.h> 76 77#include "sec_xdr.h" 78 79/* 80 * XDR an indirect pointer 81 * xdr_reference is for recursively translating a structure that is 82 * referenced by a pointer inside the structure that is currently being 83 * translated. pp references a pointer to storage. If *pp is null 84 * the necessary storage is allocated. 85 * size is the sizeof the referneced structure. 86 * proc is the routine to handle the referenced structure. 87 */ 88bool_t 89sec_xdr_reference(XDR *xdrs, uint8_t **pp, u_int size, xdrproc_t proc) 90{ 91 uint8_t *loc = pp ? *pp : NULL; 92 bool_t stat; 93 94 if (size > 1024) { 95 // Structure suspiciously large: 1024 is arbitrary upper bound 96 // for struct sizes (non-nested size) 97 assert(FALSE); 98 return (FALSE); 99 } 100 uint8_t obj[size]; 101 102 bool_t sizeof_alloc = sec_xdr_arena_size_allocator(xdrs); 103 104 if (loc == NULL) 105 switch (xdrs->x_op) { 106 case XDR_FREE: 107 return (TRUE); 108 case XDR_DECODE: 109 { 110 if (!sec_mem_alloc(xdrs, size, &loc)) 111 return (FALSE); 112 if (!loc) { 113 memset(obj, 0, size); 114 loc = &obj[0]; 115 } 116 if (!sizeof_alloc) 117 *pp = loc; 118 break; 119 } 120 case XDR_ENCODE: 121 break; 122 } 123 124 stat = (*proc)(xdrs, loc, 0); 125 126 if (xdrs->x_op == XDR_FREE) { 127 sec_mem_free(xdrs, loc, size); 128 *pp = NULL; 129 } 130 return (stat); 131} 132 133 134bool_t 135sec_xdr_pointer(XDR *xdrs, uint8_t **objpp, u_int obj_size, xdrproc_t xdr_obj) 136{ 137 bool_t more_data; 138 139 more_data = (objpp ? (*objpp != NULL) : FALSE); 140 if (! xdr_bool(xdrs,&more_data)) 141 return (FALSE); 142 143 bool_t sizeof_alloc = sec_xdr_arena_size_allocator(xdrs); 144 145 if (! more_data) { 146 if ((xdrs->x_op == XDR_DECODE) && !sizeof_alloc) 147 *objpp = NULL; 148 return (TRUE); 149 } 150 return (sec_xdr_reference(xdrs,objpp,obj_size,xdr_obj)); 151} 152 153/** 154 * This is almost a straight copy of the standard implementation, except 155 * that all calls made that allocate memory can defer to an alternate 156 * mechanism, with the purpose to allocate from one block of memory on 157 * *decode* 158 */ 159