1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * Portions of this source code were derived from Berkeley 4.3 BSD 32 * under license from the Regents of the University of California. 33 */ 34 35 #pragma ident "%Z%%M% %I% %E% SMI" 36 37 /* 38 * xdr_array.c, Generic XDR routines impelmentation. 39 * These are the "non-trivial" xdr primitives used to serialize and de-serialize 40 * arrays. See xdr.h for more info on the interface to xdr. 41 */ 42 43 #include <sys/param.h> 44 #include <sys/cmn_err.h> 45 #include <sys/types.h> 46 #include <sys/systm.h> 47 48 #include <rpc/types.h> 49 #include <rpc/xdr.h> 50 51 #define LASTUNSIGNED ((uint_t)0-1) 52 53 /* 54 * XDR an array of arbitrary elements 55 * *addrp is a pointer to the array, *sizep is the number of elements. 56 * If addrp is NULL (*sizep * elsize) bytes are allocated. 57 * elsize is the size (in bytes) of each element, and elproc is the 58 * xdr procedure to call to handle each element of the array. 59 */ 60 bool_t 61 xdr_array(XDR *xdrs, caddr_t *addrp, uint_t *sizep, const uint_t maxsize, 62 const uint_t elsize, const xdrproc_t elproc) 63 { 64 uint_t i; 65 caddr_t target = *addrp; 66 uint_t c; /* the actual element count */ 67 bool_t stat = TRUE; 68 uint_t nodesize; 69 70 /* like strings, arrays are really counted arrays */ 71 if (!xdr_u_int(xdrs, sizep)) { 72 #ifdef DEBUG 73 printf("xdr_array: size FAILED\n"); 74 #endif 75 return (FALSE); 76 } 77 c = *sizep; 78 if ((c > maxsize || LASTUNSIGNED / elsize < c) && 79 xdrs->x_op != XDR_FREE) { 80 #ifdef DEBUG 81 printf("xdr_array: bad size FAILED\n"); 82 #endif 83 return (FALSE); 84 } 85 nodesize = c * elsize; 86 87 /* 88 * if we are deserializing, we may need to allocate an array. 89 * We also save time by checking for a null array if we are freeing. 90 */ 91 if (target == NULL) 92 switch (xdrs->x_op) { 93 case XDR_DECODE: 94 if (c == 0) 95 return (TRUE); 96 *addrp = target = (char *)mem_alloc(nodesize); 97 bzero(target, nodesize); 98 break; 99 100 case XDR_FREE: 101 return (TRUE); 102 103 case XDR_ENCODE: 104 break; 105 } 106 107 /* 108 * now we xdr each element of array 109 */ 110 for (i = 0; (i < c) && stat; i++) { 111 stat = (*elproc)(xdrs, target, LASTUNSIGNED); 112 target += elsize; 113 } 114 115 /* 116 * the array may need freeing 117 */ 118 if (xdrs->x_op == XDR_FREE) { 119 mem_free(*addrp, nodesize); 120 *addrp = NULL; 121 } 122 return (stat); 123 } 124