1 /* $NetBSD: xdr_stdio.c,v 1.14 2000/01/22 22:19:19 mycroft Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (c) 2010, Oracle America, Inc. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are 10 * met: 11 * 12 * * Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * * Redistributions in binary form must reproduce the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer in the documentation and/or other materials 17 * provided with the distribution. 18 * * Neither the name of the "Oracle America, Inc." nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 26 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 29 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 31 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 33 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 #if defined(LIBC_SCCS) && !defined(lint) 37 static char *sccsid2 = "@(#)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 #endif 40 /* 41 * xdr_stdio.c, XDR implementation on standard i/o file. 42 * 43 * This set of routines implements a XDR on a stdio stream. 44 * XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes 45 * from the stream. 46 */ 47 48 #include "namespace.h" 49 #include <stdio.h> 50 51 #include <arpa/inet.h> 52 #include <rpc/types.h> 53 #include <rpc/xdr.h> 54 #include "un-namespace.h" 55 56 static void xdrstdio_destroy(XDR *); 57 static bool_t xdrstdio_getlong(XDR *, long *); 58 static bool_t xdrstdio_putlong(XDR *, const long *); 59 static bool_t xdrstdio_getbytes(XDR *, char *, u_int); 60 static bool_t xdrstdio_putbytes(XDR *, const char *, u_int); 61 static u_int xdrstdio_getpos(XDR *); 62 static bool_t xdrstdio_setpos(XDR *, u_int); 63 static int32_t *xdrstdio_inline(XDR *, u_int); 64 65 /* 66 * Ops vector for stdio type XDR 67 */ 68 static const struct xdr_ops xdrstdio_ops = { 69 xdrstdio_getlong, /* deseraialize a long int */ 70 xdrstdio_putlong, /* seraialize a long int */ 71 xdrstdio_getbytes, /* deserialize counted bytes */ 72 xdrstdio_putbytes, /* serialize counted bytes */ 73 xdrstdio_getpos, /* get offset in the stream */ 74 xdrstdio_setpos, /* set offset in the stream */ 75 xdrstdio_inline, /* prime stream for inline macros */ 76 xdrstdio_destroy /* destroy stream */ 77 }; 78 79 /* 80 * Initialize a stdio xdr stream. 81 * Sets the xdr stream handle xdrs for use on the stream file. 82 * Operation flag is set to op. 83 */ 84 void 85 xdrstdio_create(XDR *xdrs, FILE *file, enum xdr_op op) 86 { 87 88 xdrs->x_op = op; 89 xdrs->x_ops = &xdrstdio_ops; 90 xdrs->x_private = file; 91 xdrs->x_handy = 0; 92 xdrs->x_base = 0; 93 } 94 95 /* 96 * Destroy a stdio xdr stream. 97 * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create. 98 */ 99 static void 100 xdrstdio_destroy(XDR *xdrs) 101 { 102 (void)fflush((FILE *)xdrs->x_private); 103 /* XXX: should we close the file ?? */ 104 } 105 106 static bool_t 107 xdrstdio_getlong(XDR *xdrs, long *lp) 108 { 109 u_int32_t temp; 110 111 if (fread(&temp, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1) 112 return (FALSE); 113 *lp = (long)ntohl(temp); 114 return (TRUE); 115 } 116 117 static bool_t 118 xdrstdio_putlong(XDR *xdrs, const long *lp) 119 { 120 int32_t mycopy = htonl((u_int32_t)*lp); 121 122 if (fwrite(&mycopy, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1) 123 return (FALSE); 124 return (TRUE); 125 } 126 127 static bool_t 128 xdrstdio_getbytes(XDR *xdrs, char *addr, u_int len) 129 { 130 131 if ((len != 0) && (fread(addr, (size_t)len, 1, (FILE *)xdrs->x_private) != 1)) 132 return (FALSE); 133 return (TRUE); 134 } 135 136 static bool_t 137 xdrstdio_putbytes(XDR *xdrs, const char *addr, u_int len) 138 { 139 140 if ((len != 0) && (fwrite(addr, (size_t)len, 1, 141 (FILE *)xdrs->x_private) != 1)) 142 return (FALSE); 143 return (TRUE); 144 } 145 146 static u_int 147 xdrstdio_getpos(XDR *xdrs) 148 { 149 150 return ((u_int) ftell((FILE *)xdrs->x_private)); 151 } 152 153 static bool_t 154 xdrstdio_setpos(XDR *xdrs, u_int pos) 155 { 156 157 return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ? 158 FALSE : TRUE); 159 } 160 161 /* ARGSUSED */ 162 static int32_t * 163 xdrstdio_inline(XDR *xdrs, u_int len) 164 { 165 166 /* 167 * Must do some work to implement this: must insure 168 * enough data in the underlying stdio buffer, 169 * that the buffer is aligned so that we can indirect through a 170 * long *, and stuff this pointer in xdrs->x_buf. Doing 171 * a fread or fwrite to a scratch buffer would defeat 172 * most of the gains to be had here and require storage 173 * management on this buffer, so we don't do this. 174 */ 175 return (NULL); 176 } 177