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(XDR *xdrs, FILE *file, enum xdr_op op) 87 { 88 89 xdrs->x_op = op; 90 xdrs->x_ops = &xdrstdio_ops; 91 xdrs->x_private = file; 92 xdrs->x_handy = 0; 93 xdrs->x_base = 0; 94 } 95 96 /* 97 * Destroy a stdio xdr stream. 98 * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create. 99 */ 100 static void 101 xdrstdio_destroy(XDR *xdrs) 102 { 103 (void)fflush((FILE *)xdrs->x_private); 104 /* XXX: should we close the file ?? */ 105 } 106 107 static bool_t 108 xdrstdio_getlong(XDR *xdrs, long *lp) 109 { 110 u_int32_t temp; 111 112 if (fread(&temp, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1) 113 return (FALSE); 114 *lp = (long)ntohl(temp); 115 return (TRUE); 116 } 117 118 static bool_t 119 xdrstdio_putlong(XDR *xdrs, const long *lp) 120 { 121 int32_t mycopy = htonl((u_int32_t)*lp); 122 123 if (fwrite(&mycopy, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1) 124 return (FALSE); 125 return (TRUE); 126 } 127 128 static bool_t 129 xdrstdio_getbytes(XDR *xdrs, char *addr, u_int len) 130 { 131 132 if ((len != 0) && (fread(addr, (size_t)len, 1, (FILE *)xdrs->x_private) != 1)) 133 return (FALSE); 134 return (TRUE); 135 } 136 137 static bool_t 138 xdrstdio_putbytes(XDR *xdrs, const char *addr, u_int len) 139 { 140 141 if ((len != 0) && (fwrite(addr, (size_t)len, 1, 142 (FILE *)xdrs->x_private) != 1)) 143 return (FALSE); 144 return (TRUE); 145 } 146 147 static u_int 148 xdrstdio_getpos(XDR *xdrs) 149 { 150 151 return ((u_int) ftell((FILE *)xdrs->x_private)); 152 } 153 154 static bool_t 155 xdrstdio_setpos(XDR *xdrs, u_int pos) 156 { 157 158 return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ? 159 FALSE : TRUE); 160 } 161 162 /* ARGSUSED */ 163 static int32_t * 164 xdrstdio_inline(XDR *xdrs, u_int len) 165 { 166 167 /* 168 * Must do some work to implement this: must insure 169 * enough data in the underlying stdio buffer, 170 * that the buffer is aligned so that we can indirect through a 171 * long *, and stuff this pointer in xdrs->x_buf. Doing 172 * a fread or fwrite to a scratch buffer would defeat 173 * most of the gains to be had here and require storage 174 * management on this buffer, so we don't do this. 175 */ 176 return (NULL); 177 } 178