17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate * CDDL HEADER START
37c478bd9Sstevel@tonic-gate *
47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
57c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
67c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
77c478bd9Sstevel@tonic-gate * with the License.
87c478bd9Sstevel@tonic-gate *
97c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
107c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
117c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
127c478bd9Sstevel@tonic-gate * and limitations under the License.
137c478bd9Sstevel@tonic-gate *
147c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
157c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
167c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
177c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
187c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
197c478bd9Sstevel@tonic-gate *
207c478bd9Sstevel@tonic-gate * CDDL HEADER END
2161961e0fSrobinson */
2261961e0fSrobinson
2361961e0fSrobinson /*
24e8031f0aSraf * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
257c478bd9Sstevel@tonic-gate * Use is subject to license terms.
267c478bd9Sstevel@tonic-gate */
27e8031f0aSraf
287c478bd9Sstevel@tonic-gate /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
297c478bd9Sstevel@tonic-gate /* All Rights Reserved */
307c478bd9Sstevel@tonic-gate /*
317c478bd9Sstevel@tonic-gate * Portions of this source code were derived from Berkeley
327c478bd9Sstevel@tonic-gate * 4.3 BSD under license from the Regents of the University of
337c478bd9Sstevel@tonic-gate * California.
347c478bd9Sstevel@tonic-gate */
357c478bd9Sstevel@tonic-gate
367c478bd9Sstevel@tonic-gate /*
37e8031f0aSraf * Generic XDR routines impelmentation.
387c478bd9Sstevel@tonic-gate *
397c478bd9Sstevel@tonic-gate * These are the "non-trivial" xdr primitives used to serialize and de-serialize
407c478bd9Sstevel@tonic-gate * arrays. See xdr.h for more info on the interface to xdr.
417c478bd9Sstevel@tonic-gate */
427c478bd9Sstevel@tonic-gate
43e8031f0aSraf #include "mt.h"
447c478bd9Sstevel@tonic-gate #include <sys/types.h>
457c478bd9Sstevel@tonic-gate #include <syslog.h>
467c478bd9Sstevel@tonic-gate #include <stdio.h>
477c478bd9Sstevel@tonic-gate #include <stdlib.h>
487c478bd9Sstevel@tonic-gate
497c478bd9Sstevel@tonic-gate #include <rpc/types.h>
507c478bd9Sstevel@tonic-gate #include <rpc/xdr.h>
517c478bd9Sstevel@tonic-gate #include <memory.h>
527c478bd9Sstevel@tonic-gate
537c478bd9Sstevel@tonic-gate #define LASTUNSIGNED ((uint_t)0-1)
547c478bd9Sstevel@tonic-gate
557c478bd9Sstevel@tonic-gate char mem_err_msg_arr[] = "xdr_array: out of memory";
5661961e0fSrobinson
577c478bd9Sstevel@tonic-gate /*
587c478bd9Sstevel@tonic-gate * XDR an array of arbitrary elements
597c478bd9Sstevel@tonic-gate * *addrp is a pointer to the array, *sizep is the number of elements.
607c478bd9Sstevel@tonic-gate * If *addrp is NULL (*sizep * elsize) bytes are allocated.
617c478bd9Sstevel@tonic-gate * elsize is the size (in bytes) of each element, and elproc is the
627c478bd9Sstevel@tonic-gate * xdr procedure to call to handle each element of the array.
637c478bd9Sstevel@tonic-gate */
647c478bd9Sstevel@tonic-gate bool_t
xdr_array(XDR * xdrs,caddr_t * addrp,uint_t * sizep,const uint_t maxsize,const uint_t elsize,const xdrproc_t elproc)6561961e0fSrobinson xdr_array(XDR *xdrs, caddr_t *addrp, uint_t *sizep, const uint_t maxsize,
66*22cc5755SMarcel Telka const uint_t elsize, const xdrproc_t elproc)
677c478bd9Sstevel@tonic-gate {
6861961e0fSrobinson uint_t i;
6961961e0fSrobinson caddr_t target = *addrp;
7061961e0fSrobinson uint_t c; /* the actual element count */
7161961e0fSrobinson bool_t stat = TRUE;
7261961e0fSrobinson uint_t nodesize;
737c478bd9Sstevel@tonic-gate
747c478bd9Sstevel@tonic-gate /* like strings, arrays are really counted arrays */
7561961e0fSrobinson if (!xdr_u_int(xdrs, sizep))
767c478bd9Sstevel@tonic-gate return (FALSE);
777c478bd9Sstevel@tonic-gate c = *sizep;
787c478bd9Sstevel@tonic-gate if ((c > maxsize || LASTUNSIGNED / elsize < c) &&
7961961e0fSrobinson xdrs->x_op != XDR_FREE)
807c478bd9Sstevel@tonic-gate return (FALSE);
817c478bd9Sstevel@tonic-gate nodesize = c * elsize;
827c478bd9Sstevel@tonic-gate
837c478bd9Sstevel@tonic-gate /*
847c478bd9Sstevel@tonic-gate * if we are deserializing, we may need to allocate an array.
857c478bd9Sstevel@tonic-gate * We also save time by checking for a null array if we are freeing.
867c478bd9Sstevel@tonic-gate */
877c478bd9Sstevel@tonic-gate if (target == NULL)
887c478bd9Sstevel@tonic-gate switch (xdrs->x_op) {
897c478bd9Sstevel@tonic-gate case XDR_DECODE:
9061961e0fSrobinson if (c == 0)
917c478bd9Sstevel@tonic-gate return (TRUE);
9261961e0fSrobinson *addrp = target = malloc(nodesize);
937c478bd9Sstevel@tonic-gate if (target == NULL) {
947c478bd9Sstevel@tonic-gate (void) syslog(LOG_ERR, mem_err_msg_arr);
957c478bd9Sstevel@tonic-gate return (FALSE);
967c478bd9Sstevel@tonic-gate }
977c478bd9Sstevel@tonic-gate (void) memset(target, 0, nodesize);
987c478bd9Sstevel@tonic-gate break;
997c478bd9Sstevel@tonic-gate
1007c478bd9Sstevel@tonic-gate case XDR_FREE:
1017c478bd9Sstevel@tonic-gate return (TRUE);
1027c478bd9Sstevel@tonic-gate }
1037c478bd9Sstevel@tonic-gate
1047c478bd9Sstevel@tonic-gate /*
1057c478bd9Sstevel@tonic-gate * now we xdr each element of array
1067c478bd9Sstevel@tonic-gate */
1077c478bd9Sstevel@tonic-gate for (i = 0; (i < c) && stat; i++) {
1087c478bd9Sstevel@tonic-gate stat = (*elproc)(xdrs, target);
1097c478bd9Sstevel@tonic-gate target += elsize;
1107c478bd9Sstevel@tonic-gate }
1117c478bd9Sstevel@tonic-gate
1127c478bd9Sstevel@tonic-gate /*
1137c478bd9Sstevel@tonic-gate * the array may need freeing
1147c478bd9Sstevel@tonic-gate */
1157c478bd9Sstevel@tonic-gate if (xdrs->x_op == XDR_FREE) {
11661961e0fSrobinson free(*addrp);
1177c478bd9Sstevel@tonic-gate *addrp = NULL;
1187c478bd9Sstevel@tonic-gate }
1197c478bd9Sstevel@tonic-gate return (stat);
1207c478bd9Sstevel@tonic-gate }
1217c478bd9Sstevel@tonic-gate
1227c478bd9Sstevel@tonic-gate /*
1237c478bd9Sstevel@tonic-gate * xdr_vector():
1247c478bd9Sstevel@tonic-gate *
1257c478bd9Sstevel@tonic-gate * XDR a fixed length array. Unlike variable-length arrays,
1267c478bd9Sstevel@tonic-gate * the storage of fixed length arrays is static and unfreeable.
1277c478bd9Sstevel@tonic-gate * > basep: base of the array
1287c478bd9Sstevel@tonic-gate * > size: size of the array
1297c478bd9Sstevel@tonic-gate * > elemsize: size of each element
1307c478bd9Sstevel@tonic-gate * > xdr_elem: routine to XDR each element
1317c478bd9Sstevel@tonic-gate */
1327c478bd9Sstevel@tonic-gate bool_t
xdr_vector(XDR * xdrs,char * basep,const uint_t nelem,const uint_t elemsize,const xdrproc_t xdr_elem)13361961e0fSrobinson xdr_vector(XDR *xdrs, char *basep, const uint_t nelem,
134*22cc5755SMarcel Telka const uint_t elemsize, const xdrproc_t xdr_elem)
1357c478bd9Sstevel@tonic-gate {
13661961e0fSrobinson uint_t i;
13761961e0fSrobinson char *elptr;
1387c478bd9Sstevel@tonic-gate
139*22cc5755SMarcel Telka /* Make sure x_op contains a valid value */
140*22cc5755SMarcel Telka if (xdrs->x_op != XDR_ENCODE &&
141*22cc5755SMarcel Telka xdrs->x_op != XDR_DECODE &&
142*22cc5755SMarcel Telka xdrs->x_op != XDR_FREE)
143*22cc5755SMarcel Telka return (FALSE);
144*22cc5755SMarcel Telka
1457c478bd9Sstevel@tonic-gate elptr = basep;
1467c478bd9Sstevel@tonic-gate for (i = 0; i < nelem; i++) {
14761961e0fSrobinson if (!(*xdr_elem)(xdrs, elptr, LASTUNSIGNED))
1487c478bd9Sstevel@tonic-gate return (FALSE);
1497c478bd9Sstevel@tonic-gate elptr += elemsize;
1507c478bd9Sstevel@tonic-gate }
1517c478bd9Sstevel@tonic-gate return (TRUE);
1527c478bd9Sstevel@tonic-gate }
153