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 * Copyright 1991 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 26 /* All Rights Reserved */ 27 /* 28 * Portions of this source code were derived from Berkeley 29 * 4.3 BSD under license from the Regents of the University of 30 * California. 31 */ 32 33 #pragma ident "%Z%%M% %I% %E% SMI" 34 35 /* 36 * xdr_refer.c, Generic XDR routines impelmentation. 37 * 38 * These are the "non-trivial" xdr primitives used to serialize and de-serialize 39 * "pointers". See xdr.h for more info on the interface to xdr. 40 */ 41 #include <sys/types.h> 42 #include <rpc/trace.h> 43 #ifdef KERNEL 44 #include <sys/param.h> 45 #else 46 #include <syslog.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #endif 50 #include <rpc/types.h> 51 #include <rpc/xdr.h> 52 #include <memory.h> 53 54 #define LASTUNSIGNED ((u_int)0-1) 55 char mem_err_msg_ref[] = "xdr_reference: out of memory"; 56 57 /* 58 * XDR an indirect pointer 59 * xdr_reference is for recursively translating a structure that is 60 * referenced by a pointer inside the structure that is currently being 61 * translated. pp references a pointer to storage. If *pp is null 62 * the necessary storage is allocated. 63 * size is the sizeof the referneced structure. 64 * proc is the routine to handle the referenced structure. 65 */ 66 bool_t 67 xdr_reference(XDR *xdrs, caddr_t *pp, u_int size, xdrproc_t proc) 68 { 69 register caddr_t loc = *pp; 70 register bool_t stat; 71 72 trace2(TR_xdr_reference, 0, size); 73 if (loc == NULL) 74 switch (xdrs->x_op) { 75 case XDR_FREE: 76 trace1(TR_xdr_reference, 1); 77 return (TRUE); 78 79 case XDR_DECODE: 80 *pp = loc = (caddr_t) mem_alloc(size); 81 #ifndef KERNEL 82 if (loc == NULL) { 83 (void) syslog(LOG_ERR, mem_err_msg_ref); 84 85 trace1(TR_xdr_reference, 1); 86 return (FALSE); 87 } 88 (void) memset(loc, 0, (int)size); 89 #else 90 (void) memset(loc, 0, size); 91 #endif 92 break; 93 } 94 95 stat = (*proc)(xdrs, loc, LASTUNSIGNED); 96 97 if (xdrs->x_op == XDR_FREE) { 98 mem_free(loc, size); 99 *pp = NULL; 100 } 101 trace1(TR_xdr_reference, 1); 102 return (stat); 103 } 104 105 106 #ifndef KERNEL 107 /* 108 * xdr_pointer(): 109 * 110 * XDR a pointer to a possibly recursive data structure. This 111 * differs with xdr_reference in that it can serialize/deserialiaze 112 * trees correctly. 113 * 114 * What's sent is actually a union: 115 * 116 * union object_pointer switch (boolean b) { 117 * case TRUE: object_data data; 118 * case FALSE: void nothing; 119 * } 120 * 121 * > objpp: Pointer to the pointer to the object. 122 * > obj_size: size of the object. 123 * > xdr_obj: routine to XDR an object. 124 * 125 */ 126 bool_t 127 xdr_pointer(XDR *xdrs, char **objpp, u_int obj_size, xdrproc_t xdr_obj) 128 { 129 bool_t more_data; 130 bool_t dummy; 131 132 trace2(TR_xdr_pointer, 0, obj_size); 133 more_data = (*objpp != NULL); 134 if (! xdr_bool(xdrs, &more_data)) { 135 trace1(TR_xdr_pointer, 1); 136 return (FALSE); 137 } 138 if (! more_data) { 139 *objpp = NULL; 140 trace1(TR_xdr_pointer, 1); 141 return (TRUE); 142 } 143 dummy = xdr_reference(xdrs, objpp, obj_size, xdr_obj); 144 trace1(TR_xdr_pointer, 1); 145 return (dummy); 146 } 147 #endif /* ! KERNEL */ 148