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 2005 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 /* 30 * Portions of this source code were derived from Berkeley 31 * 4.3 BSD under license from the Regents of the University of 32 * California. 33 */ 34 35 /* 36 * xdr_stdio.c, XDR implementation on standard i/o file. 37 * 38 * This set of routines implements a XDR on a stdio stream. 39 * XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes 40 * from the stream. 41 */ 42 43 #include "mt.h" 44 #include "rpc_mt.h" 45 #include <rpc/types.h> 46 #include <stdio.h> 47 #include <rpc/xdr.h> 48 #include <sys/types.h> 49 #include <inttypes.h> 50 51 static struct xdr_ops *xdrstdio_ops(void); 52 53 /* 54 * Initialize a stdio xdr stream. 55 * Sets the xdr stream handle xdrs for use on the stream file. 56 * Operation flag is set to op. 57 */ 58 void 59 xdrstdio_create(XDR *xdrs, FILE *file, const enum xdr_op op) 60 { 61 xdrs->x_op = op; 62 xdrs->x_ops = xdrstdio_ops(); 63 xdrs->x_private = (caddr_t)file; 64 xdrs->x_handy = 0; 65 xdrs->x_base = 0; 66 } 67 68 /* 69 * Destroy a stdio xdr stream. 70 * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create. 71 */ 72 static void 73 xdrstdio_destroy(XDR *xdrs) 74 { 75 /* LINTED pointer cast */ 76 (void) fflush((FILE *)xdrs->x_private); 77 /* xx should we close the file ?? */ 78 } 79 80 81 static bool_t 82 xdrstdio_getint32(XDR *xdrs, int32_t *lp) 83 { 84 if (fread((caddr_t)lp, sizeof (int32_t), 1, 85 /* LINTED pointer cast */ 86 (FILE *)xdrs->x_private) != 1) 87 return (FALSE); 88 *lp = ntohl(*lp); 89 return (TRUE); 90 } 91 92 static bool_t 93 xdrstdio_putint32(XDR *xdrs, int32_t *lp) 94 { 95 96 int32_t mycopy = htonl(*lp); 97 lp = &mycopy; 98 99 if (fwrite((caddr_t)lp, sizeof (int32_t), 1, 100 /* LINTED pointer cast */ 101 (FILE *)xdrs->x_private) != 1) 102 return (FALSE); 103 return (TRUE); 104 } 105 106 static bool_t 107 xdrstdio_getlong(XDR *xdrs, long *lp) 108 { 109 int32_t i; 110 111 if (!xdrstdio_getint32(xdrs, &i)) 112 return (FALSE); 113 *lp = (long)i; 114 return (TRUE); 115 } 116 117 static bool_t 118 xdrstdio_putlong(XDR *xdrs, long *lp) 119 { 120 int32_t i; 121 122 #if defined(_LP64) 123 if ((*lp > INT32_MAX) || (*lp < INT32_MIN)) 124 return (FALSE); 125 #endif 126 i = (int32_t)*lp; 127 128 return (xdrstdio_putint32(xdrs, &i)); 129 } 130 131 static bool_t 132 xdrstdio_getbytes(XDR *xdrs, caddr_t addr, int len) 133 { 134 if ((len != 0) && 135 /* LINTED pointer cast */ 136 (fread(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1)) 137 return (FALSE); 138 return (TRUE); 139 } 140 141 static bool_t 142 xdrstdio_putbytes(XDR *xdrs, caddr_t addr, int len) 143 { 144 if ((len != 0) && 145 /* LINTED pointer cast */ 146 (fwrite(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1)) 147 return (FALSE); 148 return (TRUE); 149 } 150 151 static uint_t 152 xdrstdio_getpos(XDR *xdrs) 153 { 154 /* LINTED pointer cast */ 155 return ((uint_t)ftell((FILE *)xdrs->x_private)); 156 } 157 158 static bool_t 159 xdrstdio_setpos(XDR *xdrs, uint_t pos) 160 { 161 /* LINTED pointer cast */ 162 return ((fseek((FILE *)xdrs->x_private, 163 (int)pos, 0) < 0) ? FALSE : TRUE); 164 } 165 166 /* ARGSUSED */ 167 static rpc_inline_t * 168 xdrstdio_inline(XDR *xdrs, int len) 169 { 170 /* 171 * Must do some work to implement this: must insure 172 * enough data in the underlying stdio buffer, 173 * that the buffer is aligned so that we can indirect through a 174 * long *, and stuff this pointer in xdrs->x_buf. Doing 175 * a fread or fwrite to a scratch buffer would defeat 176 * most of the gains to be had here and require storage 177 * management on this buffer, so we don't do this. 178 */ 179 return (NULL); 180 } 181 182 /* ARGSUSED */ 183 static bool_t 184 xdrstdio_control(XDR *xdrs, int request, void *info) 185 { 186 return (FALSE); 187 } 188 189 static struct xdr_ops * 190 xdrstdio_ops(void) 191 { 192 static struct xdr_ops ops; 193 extern mutex_t ops_lock; 194 195 /* VARIABLES PROTECTED BY ops_lock: ops */ 196 197 (void) mutex_lock(&ops_lock); 198 if (ops.x_getlong == NULL) { 199 ops.x_getlong = xdrstdio_getlong; 200 ops.x_putlong = xdrstdio_putlong; 201 ops.x_getbytes = xdrstdio_getbytes; 202 ops.x_putbytes = xdrstdio_putbytes; 203 ops.x_getpostn = xdrstdio_getpos; 204 ops.x_setpostn = xdrstdio_setpos; 205 ops.x_inline = xdrstdio_inline; 206 ops.x_destroy = xdrstdio_destroy; 207 ops.x_control = xdrstdio_control; 208 #if defined(_LP64) 209 ops.x_getint32 = xdrstdio_getint32; 210 ops.x_putint32 = xdrstdio_putint32; 211 #endif 212 } 213 (void) mutex_unlock(&ops_lock); 214 return (&ops); 215 } 216