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 /* 24 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 28 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 29 /* All Rights Reserved */ 30 /* 31 * Portions of this source code were derived from Berkeley 32 * 4.3 BSD under license from the Regents of the University of 33 * California. 34 */ 35 36 #pragma ident "%Z%%M% %I% %E% SMI" 37 38 /* 39 * Generic XDR routines impelmentation. 40 * 41 * These are the "non-trivial" xdr primitives used to serialize and de-serialize 42 * arrays. See xdr.h for more info on the interface to xdr. 43 */ 44 45 #include "mt.h" 46 #include <sys/types.h> 47 #include <syslog.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 51 #include <rpc/types.h> 52 #include <rpc/xdr.h> 53 #include <memory.h> 54 55 #define LASTUNSIGNED ((uint_t)0-1) 56 57 char mem_err_msg_arr[] = "xdr_array: out of memory"; 58 59 /* 60 * XDR an array of arbitrary elements 61 * *addrp is a pointer to the array, *sizep is the number of elements. 62 * If *addrp is NULL (*sizep * elsize) bytes are allocated. 63 * elsize is the size (in bytes) of each element, and elproc is the 64 * xdr procedure to call to handle each element of the array. 65 */ 66 bool_t 67 xdr_array(XDR *xdrs, caddr_t *addrp, uint_t *sizep, const uint_t maxsize, 68 const uint_t elsize, const xdrproc_t elproc) 69 { 70 uint_t i; 71 caddr_t target = *addrp; 72 uint_t c; /* the actual element count */ 73 bool_t stat = TRUE; 74 uint_t nodesize; 75 76 /* like strings, arrays are really counted arrays */ 77 if (!xdr_u_int(xdrs, sizep)) 78 return (FALSE); 79 c = *sizep; 80 if ((c > maxsize || LASTUNSIGNED / elsize < c) && 81 xdrs->x_op != XDR_FREE) 82 return (FALSE); 83 nodesize = c * elsize; 84 85 /* 86 * if we are deserializing, we may need to allocate an array. 87 * We also save time by checking for a null array if we are freeing. 88 */ 89 if (target == NULL) 90 switch (xdrs->x_op) { 91 case XDR_DECODE: 92 if (c == 0) 93 return (TRUE); 94 *addrp = target = malloc(nodesize); 95 if (target == NULL) { 96 (void) syslog(LOG_ERR, mem_err_msg_arr); 97 return (FALSE); 98 } 99 (void) memset(target, 0, nodesize); 100 break; 101 102 case XDR_FREE: 103 return (TRUE); 104 } 105 106 /* 107 * now we xdr each element of array 108 */ 109 for (i = 0; (i < c) && stat; i++) { 110 stat = (*elproc)(xdrs, target); 111 target += elsize; 112 } 113 114 /* 115 * the array may need freeing 116 */ 117 if (xdrs->x_op == XDR_FREE) { 118 free(*addrp); 119 *addrp = NULL; 120 } 121 return (stat); 122 } 123 124 /* 125 * xdr_vector(): 126 * 127 * XDR a fixed length array. Unlike variable-length arrays, 128 * the storage of fixed length arrays is static and unfreeable. 129 * > basep: base of the array 130 * > size: size of the array 131 * > elemsize: size of each element 132 * > xdr_elem: routine to XDR each element 133 */ 134 bool_t 135 xdr_vector(XDR *xdrs, char *basep, const uint_t nelem, 136 const uint_t elemsize, const xdrproc_t xdr_elem) 137 { 138 uint_t i; 139 char *elptr; 140 141 elptr = basep; 142 for (i = 0; i < nelem; i++) { 143 if (!(*xdr_elem)(xdrs, elptr, LASTUNSIGNED)) 144 return (FALSE); 145 elptr += elemsize; 146 } 147 return (TRUE); 148 } 149