1 /* $NetBSD: xdr_stdio.c,v 1.14 2000/01/22 22:19:19 mycroft Exp $ */ 2 3 /* 4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5 * unrestricted use provided that this legend is included on all tape 6 * media and as a part of the software program in whole or part. Users 7 * may copy or modify Sun RPC without charge, but are not authorized 8 * to license or distribute it to anyone else except as part of a product or 9 * program developed by the user. 10 * 11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14 * 15 * Sun RPC is provided with no support and without any obligation on the 16 * part of Sun Microsystems, Inc. to assist in its use, correction, 17 * modification or enhancement. 18 * 19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21 * OR ANY PART THEREOF. 22 * 23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24 * or profits or other special, indirect and consequential damages, even if 25 * Sun has been advised of the possibility of such damages. 26 * 27 * Sun Microsystems, Inc. 28 * 2550 Garcia Avenue 29 * Mountain View, California 94043 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 /*static char *sccsid = "from: @(#)xdr_stdio.c 1.16 87/08/11 Copyr 1984 Sun Micro";*/ 35 /*static char *sccsid = "from: @(#)xdr_stdio.c 2.1 88/07/29 4.0 RPCSRC";*/ 36 static char *rcsid = "$FreeBSD$"; 37 #endif 38 39 /* 40 * xdr_stdio.c, XDR implementation on standard i/o file. 41 * 42 * Copyright (C) 1984, Sun Microsystems, Inc. 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 { 116 117 if (fread(lp, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1) 118 return (FALSE); 119 *lp = (long)ntohl((u_int32_t)*lp); 120 return (TRUE); 121 } 122 123 static bool_t 124 xdrstdio_putlong(xdrs, lp) 125 XDR *xdrs; 126 const long *lp; 127 { 128 long mycopy = (long)htonl((u_int32_t)*lp); 129 130 if (fwrite(&mycopy, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1) 131 return (FALSE); 132 return (TRUE); 133 } 134 135 static bool_t 136 xdrstdio_getbytes(xdrs, addr, len) 137 XDR *xdrs; 138 char *addr; 139 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(xdrs, addr, len) 149 XDR *xdrs; 150 const char *addr; 151 u_int len; 152 { 153 154 if ((len != 0) && (fwrite(addr, (size_t)len, 1, 155 (FILE *)xdrs->x_private) != 1)) 156 return (FALSE); 157 return (TRUE); 158 } 159 160 static u_int 161 xdrstdio_getpos(xdrs) 162 XDR *xdrs; 163 { 164 165 return ((u_int) ftell((FILE *)xdrs->x_private)); 166 } 167 168 static bool_t 169 xdrstdio_setpos(xdrs, pos) 170 XDR *xdrs; 171 u_int pos; 172 { 173 174 return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ? 175 FALSE : TRUE); 176 } 177 178 /* ARGSUSED */ 179 static int32_t * 180 xdrstdio_inline(xdrs, len) 181 XDR *xdrs; 182 u_int len; 183 { 184 185 /* 186 * Must do some work to implement this: must insure 187 * enough data in the underlying stdio buffer, 188 * that the buffer is aligned so that we can indirect through a 189 * long *, and stuff this pointer in xdrs->x_buf. Doing 190 * a fread or fwrite to a scratch buffer would defeat 191 * most of the gains to be had here and require storage 192 * management on this buffer, so we don't do this. 193 */ 194 return (NULL); 195 } 196