175366Sdeischen/* $NetBSD: xdr_reference.c,v 1.13 2000/01/22 22:19:18 mycroft Exp $ */ 274462Salfred 31902Swollman/* 41902Swollman * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 51902Swollman * unrestricted use provided that this legend is included on all tape 61902Swollman * media and as a part of the software program in whole or part. Users 71902Swollman * may copy or modify Sun RPC without charge, but are not authorized 81902Swollman * to license or distribute it to anyone else except as part of a product or 91902Swollman * program developed by the user. 108870Srgrimes * 111902Swollman * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 121902Swollman * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 131902Swollman * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 148870Srgrimes * 151902Swollman * Sun RPC is provided with no support and without any obligation on the 161902Swollman * part of Sun Microsystems, Inc. to assist in its use, correction, 171902Swollman * modification or enhancement. 188870Srgrimes * 191902Swollman * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 201902Swollman * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 211902Swollman * OR ANY PART THEREOF. 228870Srgrimes * 231902Swollman * In no event will Sun Microsystems, Inc. be liable for any lost revenue 241902Swollman * or profits or other special, indirect and consequential damages, even if 251902Swollman * Sun has been advised of the possibility of such damages. 268870Srgrimes * 271902Swollman * Sun Microsystems, Inc. 281902Swollman * 2550 Garcia Avenue 291902Swollman * Mountain View, California 94043 301902Swollman */ 311902Swollman 3274462Salfred#if defined(LIBC_SCCS) && !defined(lint) 33136582Sobrienstatic char *sccsid2 = "@(#)xdr_reference.c 1.11 87/08/11 SMI"; 3492986Sobrienstatic char *sccsid = "@(#)xdr_reference.c 2.1 88/07/29 4.0 RPCSRC"; 351902Swollman#endif 3692986Sobrien#include <sys/cdefs.h> 3792986Sobrien__FBSDID("$FreeBSD$"); 381902Swollman 391902Swollman/* 401902Swollman * xdr_reference.c, Generic XDR routines impelmentation. 411902Swollman * 421902Swollman * Copyright (C) 1987, Sun Microsystems, Inc. 431902Swollman * 441902Swollman * These are the "non-trivial" xdr primitives used to serialize and de-serialize 451902Swollman * "pointers". See xdr.h for more info on the interface to xdr. 461902Swollman */ 471902Swollman 4874462Salfred#include "namespace.h" 4974462Salfred#include <err.h> 501902Swollman#include <stdio.h> 5111669Sphk#include <stdlib.h> 5211669Sphk#include <string.h> 5374462Salfred 541902Swollman#include <rpc/types.h> 551902Swollman#include <rpc/xdr.h> 5674462Salfred#include "libc_private.h" 571902Swollman 581902Swollman/* 591902Swollman * XDR an indirect pointer 601902Swollman * xdr_reference is for recursively translating a structure that is 611902Swollman * referenced by a pointer inside the structure that is currently being 621902Swollman * translated. pp references a pointer to storage. If *pp is null 631902Swollman * the necessary storage is allocated. 641902Swollman * size is the sizeof the referneced structure. 651902Swollman * proc is the routine to handle the referenced structure. 661902Swollman */ 671902Swollmanbool_t 681902Swollmanxdr_reference(xdrs, pp, size, proc) 6974462Salfred XDR *xdrs; 701902Swollman caddr_t *pp; /* the pointer to work on */ 711902Swollman u_int size; /* size of the object pointed to */ 721902Swollman xdrproc_t proc; /* xdr routine to handle the object */ 731902Swollman{ 7474462Salfred caddr_t loc = *pp; 7574462Salfred bool_t stat; 761902Swollman 771902Swollman if (loc == NULL) 781902Swollman switch (xdrs->x_op) { 791902Swollman case XDR_FREE: 801902Swollman return (TRUE); 811902Swollman 821902Swollman case XDR_DECODE: 831902Swollman *pp = loc = (caddr_t) mem_alloc(size); 841902Swollman if (loc == NULL) { 8574462Salfred warnx("xdr_reference: out of memory"); 861902Swollman return (FALSE); 871902Swollman } 8874462Salfred memset(loc, 0, size); 891902Swollman break; 901902Swollman 9174462Salfred case XDR_ENCODE: 9274462Salfred break; 9374462Salfred } 941902Swollman 9574462Salfred stat = (*proc)(xdrs, loc); 9674462Salfred 971902Swollman if (xdrs->x_op == XDR_FREE) { 981902Swollman mem_free(loc, size); 991902Swollman *pp = NULL; 1001902Swollman } 1011902Swollman return (stat); 1021902Swollman} 1031902Swollman 1041902Swollman 1051902Swollman/* 1061902Swollman * xdr_pointer(): 1071902Swollman * 1081902Swollman * XDR a pointer to a possibly recursive data structure. This 1091902Swollman * differs with xdr_reference in that it can serialize/deserialiaze 1101902Swollman * trees correctly. 1111902Swollman * 1121902Swollman * What's sent is actually a union: 1131902Swollman * 1141902Swollman * union object_pointer switch (boolean b) { 1151902Swollman * case TRUE: object_data data; 1161902Swollman * case FALSE: void nothing; 1171902Swollman * } 1181902Swollman * 1191902Swollman * > objpp: Pointer to the pointer to the object. 1201902Swollman * > obj_size: size of the object. 1211902Swollman * > xdr_obj: routine to XDR an object. 1221902Swollman * 1231902Swollman */ 1241902Swollmanbool_t 1251902Swollmanxdr_pointer(xdrs,objpp,obj_size,xdr_obj) 12674462Salfred XDR *xdrs; 1271902Swollman char **objpp; 1281902Swollman u_int obj_size; 1291902Swollman xdrproc_t xdr_obj; 1301902Swollman{ 1311902Swollman 1321902Swollman bool_t more_data; 1331902Swollman 1341902Swollman more_data = (*objpp != NULL); 1351902Swollman if (! xdr_bool(xdrs,&more_data)) { 1361902Swollman return (FALSE); 1371902Swollman } 1381902Swollman if (! more_data) { 1391902Swollman *objpp = NULL; 1401902Swollman return (TRUE); 1411902Swollman } 1421902Swollman return (xdr_reference(xdrs,objpp,obj_size,xdr_obj)); 1431902Swollman} 144