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 * Copyright 2002 Sun Microsystems, Inc. All rights reserved. 23*0Sstevel@tonic-gate * Use is subject to license terms. 24*0Sstevel@tonic-gate */ 25*0Sstevel@tonic-gate /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 26*0Sstevel@tonic-gate /* All Rights Reserved */ 27*0Sstevel@tonic-gate /* 28*0Sstevel@tonic-gate * Portions of this source code were derived from Berkeley 29*0Sstevel@tonic-gate * 4.3 BSD under license from the Regents of the University of 30*0Sstevel@tonic-gate * California. 31*0Sstevel@tonic-gate */ 32*0Sstevel@tonic-gate 33*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 34*0Sstevel@tonic-gate 35*0Sstevel@tonic-gate /* 36*0Sstevel@tonic-gate * xdr_array.c, Generic XDR routines impelmentation. 37*0Sstevel@tonic-gate * 38*0Sstevel@tonic-gate * These are the "non-trivial" xdr primitives used to serialize and de-serialize 39*0Sstevel@tonic-gate * arrays. See xdr.h for more info on the interface to xdr. 40*0Sstevel@tonic-gate */ 41*0Sstevel@tonic-gate 42*0Sstevel@tonic-gate #include <sys/types.h> 43*0Sstevel@tonic-gate #include <rpc/trace.h> 44*0Sstevel@tonic-gate #include <syslog.h> 45*0Sstevel@tonic-gate #include <stdio.h> 46*0Sstevel@tonic-gate #include <stdlib.h> 47*0Sstevel@tonic-gate 48*0Sstevel@tonic-gate #include <rpc/types.h> 49*0Sstevel@tonic-gate #include <rpc/xdr.h> 50*0Sstevel@tonic-gate #include <memory.h> 51*0Sstevel@tonic-gate 52*0Sstevel@tonic-gate #define LASTUNSIGNED ((uint_t)0-1) 53*0Sstevel@tonic-gate 54*0Sstevel@tonic-gate char mem_err_msg_arr[] = "xdr_array: out of memory"; 55*0Sstevel@tonic-gate /* 56*0Sstevel@tonic-gate * XDR an array of arbitrary elements 57*0Sstevel@tonic-gate * *addrp is a pointer to the array, *sizep is the number of elements. 58*0Sstevel@tonic-gate * If *addrp is NULL (*sizep * elsize) bytes are allocated. 59*0Sstevel@tonic-gate * elsize is the size (in bytes) of each element, and elproc is the 60*0Sstevel@tonic-gate * xdr procedure to call to handle each element of the array. 61*0Sstevel@tonic-gate */ 62*0Sstevel@tonic-gate bool_t 63*0Sstevel@tonic-gate xdr_array(XDR *xdrs, caddr_t *addrp, uint_t *sizep, uint_t maxsize, 64*0Sstevel@tonic-gate uint_t elsize, xdrproc_t elproc) 65*0Sstevel@tonic-gate { 66*0Sstevel@tonic-gate register uint_t i; 67*0Sstevel@tonic-gate register caddr_t target = *addrp; 68*0Sstevel@tonic-gate register uint_t c; /* the actual element count */ 69*0Sstevel@tonic-gate register bool_t stat = TRUE; 70*0Sstevel@tonic-gate register uint_t nodesize; 71*0Sstevel@tonic-gate 72*0Sstevel@tonic-gate trace3(TR_xdr_array, 0, maxsize, elsize); 73*0Sstevel@tonic-gate /* like strings, arrays are really counted arrays */ 74*0Sstevel@tonic-gate if (! xdr_u_int(xdrs, sizep)) { 75*0Sstevel@tonic-gate trace1(TR_xdr_array, 1); 76*0Sstevel@tonic-gate return (FALSE); 77*0Sstevel@tonic-gate } 78*0Sstevel@tonic-gate c = *sizep; 79*0Sstevel@tonic-gate if ((c > maxsize || LASTUNSIGNED / elsize < c) && 80*0Sstevel@tonic-gate xdrs->x_op != XDR_FREE) { 81*0Sstevel@tonic-gate trace1(TR_xdr_array, 1); 82*0Sstevel@tonic-gate return (FALSE); 83*0Sstevel@tonic-gate } 84*0Sstevel@tonic-gate nodesize = c * elsize; 85*0Sstevel@tonic-gate 86*0Sstevel@tonic-gate /* 87*0Sstevel@tonic-gate * if we are deserializing, we may need to allocate an array. 88*0Sstevel@tonic-gate * We also save time by checking for a null array if we are freeing. 89*0Sstevel@tonic-gate */ 90*0Sstevel@tonic-gate if (target == NULL) 91*0Sstevel@tonic-gate switch (xdrs->x_op) { 92*0Sstevel@tonic-gate case XDR_DECODE: 93*0Sstevel@tonic-gate if (c == 0) { 94*0Sstevel@tonic-gate trace1(TR_xdr_array, 1); 95*0Sstevel@tonic-gate return (TRUE); 96*0Sstevel@tonic-gate } 97*0Sstevel@tonic-gate *addrp = target = (caddr_t)mem_alloc(nodesize); 98*0Sstevel@tonic-gate if (target == NULL) { 99*0Sstevel@tonic-gate (void) syslog(LOG_ERR, mem_err_msg_arr); 100*0Sstevel@tonic-gate trace1(TR_xdr_array, 1); 101*0Sstevel@tonic-gate return (FALSE); 102*0Sstevel@tonic-gate } 103*0Sstevel@tonic-gate (void) memset(target, 0, nodesize); 104*0Sstevel@tonic-gate break; 105*0Sstevel@tonic-gate 106*0Sstevel@tonic-gate case XDR_FREE: 107*0Sstevel@tonic-gate trace1(TR_xdr_array, 1); 108*0Sstevel@tonic-gate return (TRUE); 109*0Sstevel@tonic-gate } 110*0Sstevel@tonic-gate 111*0Sstevel@tonic-gate /* 112*0Sstevel@tonic-gate * now we xdr each element of array 113*0Sstevel@tonic-gate */ 114*0Sstevel@tonic-gate for (i = 0; (i < c) && stat; i++) { 115*0Sstevel@tonic-gate stat = (*elproc)(xdrs, target); 116*0Sstevel@tonic-gate target += elsize; 117*0Sstevel@tonic-gate } 118*0Sstevel@tonic-gate 119*0Sstevel@tonic-gate /* 120*0Sstevel@tonic-gate * the array may need freeing 121*0Sstevel@tonic-gate */ 122*0Sstevel@tonic-gate if (xdrs->x_op == XDR_FREE) { 123*0Sstevel@tonic-gate mem_free(*addrp, nodesize); 124*0Sstevel@tonic-gate *addrp = NULL; 125*0Sstevel@tonic-gate } 126*0Sstevel@tonic-gate trace1(TR_xdr_array, 1); 127*0Sstevel@tonic-gate return (stat); 128*0Sstevel@tonic-gate } 129*0Sstevel@tonic-gate 130*0Sstevel@tonic-gate /* 131*0Sstevel@tonic-gate * xdr_vector(): 132*0Sstevel@tonic-gate * 133*0Sstevel@tonic-gate * XDR a fixed length array. Unlike variable-length arrays, 134*0Sstevel@tonic-gate * the storage of fixed length arrays is static and unfreeable. 135*0Sstevel@tonic-gate * > basep: base of the array 136*0Sstevel@tonic-gate * > size: size of the array 137*0Sstevel@tonic-gate * > elemsize: size of each element 138*0Sstevel@tonic-gate * > xdr_elem: routine to XDR each element 139*0Sstevel@tonic-gate */ 140*0Sstevel@tonic-gate bool_t 141*0Sstevel@tonic-gate xdr_vector(XDR *xdrs, char *basep, uint_t nelem, 142*0Sstevel@tonic-gate uint_t elemsize, xdrproc_t xdr_elem) 143*0Sstevel@tonic-gate { 144*0Sstevel@tonic-gate register uint_t i; 145*0Sstevel@tonic-gate register char *elptr; 146*0Sstevel@tonic-gate 147*0Sstevel@tonic-gate trace3(TR_xdr_vector, 0, nelem, elemsize); 148*0Sstevel@tonic-gate elptr = basep; 149*0Sstevel@tonic-gate for (i = 0; i < nelem; i++) { 150*0Sstevel@tonic-gate if (! (*xdr_elem)(xdrs, elptr, LASTUNSIGNED)) { 151*0Sstevel@tonic-gate trace1(TR_xdr_vector, 1); 152*0Sstevel@tonic-gate return (FALSE); 153*0Sstevel@tonic-gate } 154*0Sstevel@tonic-gate elptr += elemsize; 155*0Sstevel@tonic-gate } 156*0Sstevel@tonic-gate trace1(TR_xdr_vector, 1); 157*0Sstevel@tonic-gate return (TRUE); 158*0Sstevel@tonic-gate } 159