1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 28*0Sstevel@tonic-gate /* All Rights Reserved */ 29*0Sstevel@tonic-gate 30*0Sstevel@tonic-gate /* 31*0Sstevel@tonic-gate * Portions of this source code were derived from Berkeley 4.3 BSD 32*0Sstevel@tonic-gate * under license from the Regents of the University of California. 33*0Sstevel@tonic-gate */ 34*0Sstevel@tonic-gate 35*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 36*0Sstevel@tonic-gate 37*0Sstevel@tonic-gate /* 38*0Sstevel@tonic-gate * #if !defined(lint) && defined(SCCSIDS) 39*0Sstevel@tonic-gate * static char sccsid[] = "@(#)xdr_refer.c 1.21 89/02/28 SMI"; 40*0Sstevel@tonic-gate * #endif 41*0Sstevel@tonic-gate */ 42*0Sstevel@tonic-gate 43*0Sstevel@tonic-gate /* 44*0Sstevel@tonic-gate * xdr_refer.c, Generic XDR routines impelmentation. 45*0Sstevel@tonic-gate * 46*0Sstevel@tonic-gate * These are the "non-trivial" xdr primitives used to serialize and de-serialize 47*0Sstevel@tonic-gate * "pointers". See xdr.h for more info on the interface to xdr. 48*0Sstevel@tonic-gate */ 49*0Sstevel@tonic-gate 50*0Sstevel@tonic-gate #include <sys/param.h> 51*0Sstevel@tonic-gate #include <sys/systm.h> 52*0Sstevel@tonic-gate 53*0Sstevel@tonic-gate #include <rpc/types.h> 54*0Sstevel@tonic-gate #include <rpc/xdr.h> 55*0Sstevel@tonic-gate 56*0Sstevel@tonic-gate #define LASTUNSIGNED ((uint_t)0-1) 57*0Sstevel@tonic-gate 58*0Sstevel@tonic-gate /* 59*0Sstevel@tonic-gate * XDR an indirect pointer 60*0Sstevel@tonic-gate * xdr_reference is for recursively translating a structure that is 61*0Sstevel@tonic-gate * referenced by a pointer inside the structure that is currently being 62*0Sstevel@tonic-gate * translated. pp references a pointer to storage. If *pp is null 63*0Sstevel@tonic-gate * the necessary storage is allocated. 64*0Sstevel@tonic-gate * size is the sizeof the referneced structure. 65*0Sstevel@tonic-gate * proc is the routine to handle the referenced structure. 66*0Sstevel@tonic-gate */ 67*0Sstevel@tonic-gate bool_t 68*0Sstevel@tonic-gate xdr_reference(XDR *xdrs, caddr_t *pp, uint_t size, const xdrproc_t proc) 69*0Sstevel@tonic-gate { 70*0Sstevel@tonic-gate caddr_t loc = *pp; 71*0Sstevel@tonic-gate bool_t stat; 72*0Sstevel@tonic-gate 73*0Sstevel@tonic-gate if (loc == NULL) { 74*0Sstevel@tonic-gate switch (xdrs->x_op) { 75*0Sstevel@tonic-gate case XDR_FREE: 76*0Sstevel@tonic-gate return (TRUE); 77*0Sstevel@tonic-gate 78*0Sstevel@tonic-gate case XDR_DECODE: 79*0Sstevel@tonic-gate *pp = loc = (caddr_t)mem_alloc(size); 80*0Sstevel@tonic-gate bzero(loc, size); 81*0Sstevel@tonic-gate break; 82*0Sstevel@tonic-gate 83*0Sstevel@tonic-gate case XDR_ENCODE: 84*0Sstevel@tonic-gate break; 85*0Sstevel@tonic-gate } 86*0Sstevel@tonic-gate } 87*0Sstevel@tonic-gate 88*0Sstevel@tonic-gate stat = (*proc)(xdrs, loc, LASTUNSIGNED); 89*0Sstevel@tonic-gate 90*0Sstevel@tonic-gate if (xdrs->x_op == XDR_FREE) { 91*0Sstevel@tonic-gate mem_free(loc, size); 92*0Sstevel@tonic-gate *pp = NULL; 93*0Sstevel@tonic-gate } 94*0Sstevel@tonic-gate return (stat); 95*0Sstevel@tonic-gate } 96*0Sstevel@tonic-gate 97*0Sstevel@tonic-gate /* 98*0Sstevel@tonic-gate * xdr_pointer(): 99*0Sstevel@tonic-gate * 100*0Sstevel@tonic-gate * XDR a pointer to a possibly recursive data structure. This 101*0Sstevel@tonic-gate * differs with xdr_reference in that it can serialize/deserialiaze 102*0Sstevel@tonic-gate * trees correctly. 103*0Sstevel@tonic-gate * 104*0Sstevel@tonic-gate * What's sent is actually a union: 105*0Sstevel@tonic-gate * 106*0Sstevel@tonic-gate * union object_pointer switch (boolean b) { 107*0Sstevel@tonic-gate * case TRUE: object_data data; 108*0Sstevel@tonic-gate * case FALSE: void nothing; 109*0Sstevel@tonic-gate * } 110*0Sstevel@tonic-gate * 111*0Sstevel@tonic-gate * > objpp: Pointer to the pointer to the object. 112*0Sstevel@tonic-gate * > obj_size: size of the object. 113*0Sstevel@tonic-gate * > xdr_obj: routine to XDR an object. 114*0Sstevel@tonic-gate * 115*0Sstevel@tonic-gate */ 116*0Sstevel@tonic-gate bool_t 117*0Sstevel@tonic-gate xdr_pointer(XDR *xdrs, char **objpp, uint_t obj_size, const xdrproc_t xdr_obj) 118*0Sstevel@tonic-gate { 119*0Sstevel@tonic-gate bool_t more_data; 120*0Sstevel@tonic-gate 121*0Sstevel@tonic-gate more_data = (*objpp != NULL); 122*0Sstevel@tonic-gate if (!xdr_bool(xdrs, &more_data)) 123*0Sstevel@tonic-gate return (FALSE); 124*0Sstevel@tonic-gate if (!more_data) { 125*0Sstevel@tonic-gate *objpp = NULL; 126*0Sstevel@tonic-gate return (TRUE); 127*0Sstevel@tonic-gate } 128*0Sstevel@tonic-gate return (xdr_reference(xdrs, objpp, obj_size, xdr_obj)); 129*0Sstevel@tonic-gate } 130