1 /* $NetBSD: xdr_stdio.c,v 1.14 2000/01/22 22:19:19 mycroft 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 #if defined(LIBC_SCCS) && !defined(lint) 35 static char *sccsid2 = "@(#)xdr_stdio.c 1.16 87/08/11 Copyr 1984 Sun Micro"; 36 static char *sccsid = "@(#)xdr_stdio.c 2.1 88/07/29 4.0 RPCSRC"; 37 #endif 38 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD$"); 40 41 /* 42 * xdr_stdio.c, XDR implementation on standard i/o file. 43 * 44 * This set of routines implements a XDR on a stdio stream. 45 * XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes 46 * from the stream. 47 */ 48 49 #include "namespace.h" 50 #include <stdio.h> 51 52 #include <arpa/inet.h> 53 #include <rpc/types.h> 54 #include <rpc/xdr.h> 55 #include "un-namespace.h" 56 57 static void xdrstdio_destroy(XDR *); 58 static bool_t xdrstdio_getlong(XDR *, long *); 59 static bool_t xdrstdio_putlong(XDR *, const long *); 60 static bool_t xdrstdio_getbytes(XDR *, char *, u_int); 61 static bool_t xdrstdio_putbytes(XDR *, const char *, u_int); 62 static u_int xdrstdio_getpos(XDR *); 63 static bool_t xdrstdio_setpos(XDR *, u_int); 64 static int32_t *xdrstdio_inline(XDR *, u_int); 65 66 /* 67 * Ops vector for stdio type XDR 68 */ 69 static const struct xdr_ops xdrstdio_ops = { 70 xdrstdio_getlong, /* deseraialize a long int */ 71 xdrstdio_putlong, /* seraialize a long int */ 72 xdrstdio_getbytes, /* deserialize counted bytes */ 73 xdrstdio_putbytes, /* serialize counted bytes */ 74 xdrstdio_getpos, /* get offset in the stream */ 75 xdrstdio_setpos, /* set offset in the stream */ 76 xdrstdio_inline, /* prime stream for inline macros */ 77 xdrstdio_destroy /* destroy stream */ 78 }; 79 80 /* 81 * Initialize a stdio xdr stream. 82 * Sets the xdr stream handle xdrs for use on the stream file. 83 * Operation flag is set to op. 84 */ 85 void 86 xdrstdio_create(xdrs, file, op) 87 XDR *xdrs; 88 FILE *file; 89 enum xdr_op op; 90 { 91 92 xdrs->x_op = op; 93 xdrs->x_ops = &xdrstdio_ops; 94 xdrs->x_private = file; 95 xdrs->x_handy = 0; 96 xdrs->x_base = 0; 97 } 98 99 /* 100 * Destroy a stdio xdr stream. 101 * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create. 102 */ 103 static void 104 xdrstdio_destroy(xdrs) 105 XDR *xdrs; 106 { 107 (void)fflush((FILE *)xdrs->x_private); 108 /* XXX: should we close the file ?? */ 109 } 110 111 static bool_t 112 xdrstdio_getlong(xdrs, lp) 113 XDR *xdrs; 114 long *lp; 115 { 116 u_int32_t temp; 117 118 if (fread(&temp, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1) 119 return (FALSE); 120 *lp = (long)ntohl(temp); 121 return (TRUE); 122 } 123 124 static bool_t 125 xdrstdio_putlong(xdrs, lp) 126 XDR *xdrs; 127 const long *lp; 128 { 129 int32_t mycopy = htonl((u_int32_t)*lp); 130 131 if (fwrite(&mycopy, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1) 132 return (FALSE); 133 return (TRUE); 134 } 135 136 static bool_t 137 xdrstdio_getbytes(xdrs, addr, len) 138 XDR *xdrs; 139 char *addr; 140 u_int len; 141 { 142 143 if ((len != 0) && (fread(addr, (size_t)len, 1, (FILE *)xdrs->x_private) != 1)) 144 return (FALSE); 145 return (TRUE); 146 } 147 148 static bool_t 149 xdrstdio_putbytes(xdrs, addr, len) 150 XDR *xdrs; 151 const char *addr; 152 u_int len; 153 { 154 155 if ((len != 0) && (fwrite(addr, (size_t)len, 1, 156 (FILE *)xdrs->x_private) != 1)) 157 return (FALSE); 158 return (TRUE); 159 } 160 161 static u_int 162 xdrstdio_getpos(xdrs) 163 XDR *xdrs; 164 { 165 166 return ((u_int) ftell((FILE *)xdrs->x_private)); 167 } 168 169 static bool_t 170 xdrstdio_setpos(xdrs, pos) 171 XDR *xdrs; 172 u_int pos; 173 { 174 175 return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ? 176 FALSE : TRUE); 177 } 178 179 /* ARGSUSED */ 180 static int32_t * 181 xdrstdio_inline(xdrs, len) 182 XDR *xdrs; 183 u_int len; 184 { 185 186 /* 187 * Must do some work to implement this: must insure 188 * enough data in the underlying stdio buffer, 189 * that the buffer is aligned so that we can indirect through a 190 * long *, and stuff this pointer in xdrs->x_buf. Doing 191 * a fread or fwrite to a scratch buffer would defeat 192 * most of the gains to be had here and require storage 193 * management on this buffer, so we don't do this. 194 */ 195 return (NULL); 196 } 197