1 /* $NetBSD: xdr_stdio.c,v 1.20 2025/12/16 12:39:02 nia Exp $ */ 2 3 /* 4 * Copyright (c) 2010, Oracle America, Inc. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are 8 * met: 9 * 10 * * Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * * Redistributions in binary form must reproduce the above 13 * copyright notice, this list of conditions and the following 14 * disclaimer in the documentation and/or other materials 15 * provided with the distribution. 16 * * Neither the name of the "Oracle America, Inc." nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 24 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 #if defined(LIBC_SCCS) && !defined(lint) 36 #if 0 37 static char *sccsid = "@(#)xdr_stdio.c 1.16 87/08/11 Copyr 1984 Sun Micro"; 38 static char *sccsid = "@(#)xdr_stdio.c 2.1 88/07/29 4.0 RPCSRC"; 39 #else 40 __RCSID("$NetBSD: xdr_stdio.c,v 1.20 2025/12/16 12:39:02 nia Exp $"); 41 #endif 42 #endif 43 44 /* 45 * xdr_stdio.c, XDR implementation on standard i/o file. 46 * 47 * Copyright (C) 1984, Sun Microsystems, Inc. 48 * 49 * This set of routines implements a XDR on a stdio stream. 50 * XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes 51 * from the stream. 52 */ 53 54 #include "namespace.h" 55 56 #include <sys/endian.h> 57 #include <stdio.h> 58 59 #include <rpc/types.h> 60 #include <rpc/xdr.h> 61 62 #ifdef __weak_alias 63 __weak_alias(xdrstdio_create,_xdrstdio_create) 64 #endif 65 66 static void xdrstdio_destroy(XDR *); 67 static bool_t xdrstdio_getlong(XDR *, long *); 68 static bool_t xdrstdio_putlong(XDR *, const long *); 69 static bool_t xdrstdio_getbytes(XDR *, char *, u_int); 70 static bool_t xdrstdio_putbytes(XDR *, const char *, u_int); 71 static u_int xdrstdio_getpos(XDR *); 72 static bool_t xdrstdio_setpos(XDR *, u_int); 73 static int32_t *xdrstdio_inline(XDR *, u_int); 74 75 /* 76 * Ops vector for stdio type XDR 77 */ 78 static const struct xdr_ops xdrstdio_ops = { 79 xdrstdio_getlong, /* deseraialize a long int */ 80 xdrstdio_putlong, /* seraialize a long int */ 81 xdrstdio_getbytes, /* deserialize counted bytes */ 82 xdrstdio_putbytes, /* serialize counted bytes */ 83 xdrstdio_getpos, /* get offset in the stream */ 84 xdrstdio_setpos, /* set offset in the stream */ 85 xdrstdio_inline, /* prime stream for inline macros */ 86 xdrstdio_destroy, /* destroy stream */ 87 NULL, /* xdrstdio_control */ 88 }; 89 90 /* 91 * Initialize a stdio xdr stream. 92 * Sets the xdr stream handle xdrs for use on the stream file. 93 * Operation flag is set to op. 94 */ 95 void 96 xdrstdio_create(XDR *xdrs, FILE *file, enum xdr_op op) 97 { 98 99 xdrs->x_op = op; 100 xdrs->x_ops = &xdrstdio_ops; 101 xdrs->x_private = file; 102 xdrs->x_handy = 0; 103 xdrs->x_base = 0; 104 } 105 106 /* 107 * Destroy a stdio xdr stream. 108 * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create. 109 */ 110 static void 111 xdrstdio_destroy(XDR *xdrs) 112 { 113 (void)fflush((FILE *)xdrs->x_private); 114 /* XXX: should we close the file ?? */ 115 } 116 117 static bool_t 118 xdrstdio_getlong(XDR *xdrs, long *lp) 119 { 120 u_int32_t temp; 121 122 if (fread(&temp, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1) 123 return (FALSE); 124 *lp = (long)ntohl(temp); 125 return (TRUE); 126 } 127 128 static bool_t 129 xdrstdio_putlong(XDR *xdrs, const long *lp) 130 { 131 int32_t mycopy = htonl((u_int32_t)*lp); 132 133 if (fwrite(&mycopy, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1) 134 return (FALSE); 135 return (TRUE); 136 } 137 138 static bool_t 139 xdrstdio_getbytes(XDR *xdrs, char *addr, u_int len) 140 { 141 142 if ((len != 0) && (fread(addr, (size_t)len, 1, (FILE *)xdrs->x_private) != 1)) 143 return (FALSE); 144 return (TRUE); 145 } 146 147 static bool_t 148 xdrstdio_putbytes(XDR *xdrs, const char *addr, u_int len) 149 { 150 151 if ((len != 0) && (fwrite(addr, (size_t)len, 1, 152 (FILE *)xdrs->x_private) != 1)) 153 return (FALSE); 154 return (TRUE); 155 } 156 157 static u_int 158 xdrstdio_getpos(XDR *xdrs) 159 { 160 161 return ((u_int) ftell((FILE *)xdrs->x_private)); 162 } 163 164 static bool_t 165 xdrstdio_setpos(XDR *xdrs, u_int pos) 166 { 167 168 return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ? 169 FALSE : TRUE); 170 } 171 172 /* ARGSUSED */ 173 static int32_t * 174 xdrstdio_inline(XDR *xdrs, u_int len) 175 { 176 177 /* 178 * Must do some work to implement this: must insure 179 * enough data in the underlying stdio buffer, 180 * that the buffer is aligned so that we can indirect through a 181 * long *, and stuff this pointer in xdrs->x_buf. Doing 182 * a fread or fwrite to a scratch buffer would defeat 183 * most of the gains to be had here and require storage 184 * management on this buffer, so we don't do this. 185 */ 186 return (NULL); 187 } 188
Indexes created Sun Oct 25 00:26:45 UTC 2026