[444] | 1 | /* |
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| 2 | * Copyright (c) 2009, Sun Microsystems, Inc. |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions are met: |
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| 7 | * - Redistributions of source code must retain the above copyright notice, |
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| 8 | * this list of conditions and the following disclaimer. |
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| 9 | * - Redistributions in binary form must reproduce the above copyright notice, |
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| 10 | * this list of conditions and the following disclaimer in the documentation |
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| 11 | * and/or other materials provided with the distribution. |
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| 12 | * - Neither the name of Sun Microsystems, Inc. nor the names of its |
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| 13 | * contributors may be used to endorse or promote products derived |
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| 14 | * from this software without specific prior written permission. |
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| 15 | * |
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| 16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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| 17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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| 20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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| 21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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| 22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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| 23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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| 24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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| 25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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| 26 | * POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |
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| 29 | /* |
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| 30 | * xdr_stdio.c, XDR implementation on standard i/o file. |
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| 31 | * |
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| 32 | * Copyright (C) 1984, Sun Microsystems, Inc. |
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| 33 | * |
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| 34 | * This set of routines implements a XDR on a stdio stream. |
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| 35 | * XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes |
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| 36 | * from the stream. |
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| 37 | */ |
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| 38 | |
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| 39 | #include <stdio.h> |
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| 40 | |
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| 41 | #include <rpc/types.h> |
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| 42 | #include <rpc/xdr.h> |
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| 43 | |
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| 44 | #include "xdr_private.h" |
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| 45 | |
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| 46 | #ifndef ntohl |
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| 47 | # define ntohl(x) xdr_ntohl(x) |
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| 48 | #endif |
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| 49 | #ifndef htonl |
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| 50 | # define htonl(x) xdr_htonl(x) |
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| 51 | #endif |
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| 52 | |
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| 53 | static void xdrstdio_destroy (XDR *); |
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| 54 | static bool_t xdrstdio_getlong (XDR *, long *); |
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| 55 | static bool_t xdrstdio_putlong (XDR *, const long *); |
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| 56 | static bool_t xdrstdio_getbytes (XDR *, char *, u_int); |
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| 57 | static bool_t xdrstdio_putbytes (XDR *, const char *, u_int); |
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| 58 | static u_int xdrstdio_getpos (XDR *); |
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| 59 | static bool_t xdrstdio_setpos (XDR *, u_int); |
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| 60 | static int32_t * xdrstdio_inline (XDR *, u_int); |
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| 61 | static bool_t xdrstdio_getint32 (XDR*, int32_t *); |
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| 62 | static bool_t xdrstdio_putint32 (XDR*, const int32_t *); |
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| 63 | |
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| 64 | /* |
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| 65 | * Ops vector for stdio type XDR |
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| 66 | */ |
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| 67 | static const struct xdr_ops xdrstdio_ops = { |
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| 68 | xdrstdio_getlong, /* deseraialize a long int */ |
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| 69 | xdrstdio_putlong, /* seraialize a long int */ |
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| 70 | xdrstdio_getbytes, /* deserialize counted bytes */ |
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| 71 | xdrstdio_putbytes, /* serialize counted bytes */ |
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| 72 | xdrstdio_getpos, /* get offset in the stream */ |
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| 73 | xdrstdio_setpos, /* set offset in the stream */ |
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| 74 | xdrstdio_inline, /* prime stream for inline macros */ |
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| 75 | xdrstdio_destroy, /* destroy stream */ |
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| 76 | xdrstdio_getint32, /* deseraialize an int */ |
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| 77 | xdrstdio_putint32 /* seraialize an long int */ |
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| 78 | }; |
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| 79 | |
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| 80 | /* |
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| 81 | * Initialize a stdio xdr stream. |
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| 82 | * Sets the xdr stream handle xdrs for use on the stream file. |
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| 83 | * Operation flag is set to op. |
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| 84 | */ |
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| 85 | void |
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| 86 | xdrstdio_create (XDR * xdrs, |
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| 87 | FILE * file, |
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| 88 | enum xdr_op op) |
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| 89 | { |
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| 90 | xdrs->x_op = op; |
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| 91 | xdrs->x_ops = (struct xdr_ops *) &xdrstdio_ops; |
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| 92 | xdrs->x_private = (void *) file; |
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| 93 | xdrs->x_handy = 0; |
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| 94 | xdrs->x_base = 0; |
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| 95 | } |
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| 96 | |
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| 97 | /* |
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| 98 | * Destroy a stdio xdr stream. |
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| 99 | * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create. |
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| 100 | */ |
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| 101 | static void |
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| 102 | xdrstdio_destroy (XDR * xdrs) |
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| 103 | { |
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| 104 | (void) fflush ((FILE *) xdrs->x_private); |
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| 105 | /* XXX: should we close the file ?? */ |
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| 106 | } |
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| 107 | |
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| 108 | static bool_t |
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| 109 | xdrstdio_getlong (XDR * xdrs, |
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| 110 | long *lp) |
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| 111 | { |
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| 112 | u_int32_t temp; |
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| 113 | |
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| 114 | if (fread (&temp, sizeof (int32_t), 1, (FILE *) xdrs->x_private) != 1) |
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| 115 | return FALSE; |
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| 116 | *lp = (long) (int32_t) ntohl (temp); |
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| 117 | return TRUE; |
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| 118 | } |
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| 119 | |
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| 120 | static bool_t |
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| 121 | xdrstdio_putlong (XDR * xdrs, |
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| 122 | const long *lp) |
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| 123 | { |
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| 124 | u_int32_t temp = htonl ((u_int32_t) * lp); |
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| 125 | |
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| 126 | if (fwrite (&temp, sizeof (int32_t), 1, (FILE *) xdrs->x_private) != 1) |
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| 127 | return FALSE; |
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| 128 | return TRUE; |
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| 129 | } |
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| 130 | |
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| 131 | static bool_t |
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| 132 | xdrstdio_getbytes (XDR * xdrs, |
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| 133 | char *addr, |
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| 134 | u_int len) |
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| 135 | { |
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| 136 | if ((len != 0) && (fread (addr, (size_t) len, 1, |
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| 137 | (FILE *) xdrs->x_private) != 1)) |
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| 138 | return FALSE; |
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| 139 | return TRUE; |
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| 140 | } |
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| 141 | |
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| 142 | static bool_t |
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| 143 | xdrstdio_putbytes (XDR * xdrs, |
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| 144 | const char *addr, |
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| 145 | u_int len) |
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| 146 | { |
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| 147 | if ((len != 0) && (fwrite (addr, (size_t) len, 1, |
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| 148 | (FILE *) xdrs->x_private) != 1)) |
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| 149 | return FALSE; |
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| 150 | return TRUE; |
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| 151 | } |
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| 152 | |
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| 153 | static u_int |
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| 154 | xdrstdio_getpos (XDR * xdrs) |
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| 155 | { |
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| 156 | return ((u_int) ftell ((FILE *) xdrs->x_private)); |
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| 157 | } |
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| 158 | |
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| 159 | static bool_t |
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| 160 | xdrstdio_setpos (XDR * xdrs, |
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| 161 | u_int pos) |
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| 162 | { |
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| 163 | return ((fseek ((FILE *) xdrs->x_private, (long) pos, 0) < 0) ? |
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| 164 | FALSE : TRUE); |
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| 165 | } |
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| 166 | |
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| 167 | /* ARGSUSED */ |
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| 168 | static int32_t * |
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| 169 | xdrstdio_inline (XDR * xdrs, |
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| 170 | u_int len) |
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| 171 | { |
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| 172 | /* |
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| 173 | * Must do some work to implement this: must insure |
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| 174 | * enough data in the underlying stdio buffer, |
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| 175 | * that the buffer is aligned so that we can indirect through a |
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| 176 | * long *, and stuff this pointer in xdrs->x_buf. Doing |
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| 177 | * a fread or fwrite to a scratch buffer would defeat |
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| 178 | * most of the gains to be had here and require storage |
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| 179 | * management on this buffer, so we don't do this. |
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| 180 | */ |
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| 181 | return NULL; |
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| 182 | } |
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| 183 | |
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| 184 | static bool_t |
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| 185 | xdrstdio_getint32 (XDR *xdrs, |
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| 186 | int32_t *ip) |
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| 187 | { |
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| 188 | int32_t temp; |
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| 189 | |
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| 190 | if (fread (&temp, sizeof (int32_t), 1, (FILE *) xdrs->x_private) != 1) |
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| 191 | return FALSE; |
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| 192 | *ip = ntohl (temp); |
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| 193 | return TRUE; |
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| 194 | } |
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| 195 | |
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| 196 | static bool_t |
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| 197 | xdrstdio_putint32 (XDR *xdrs, |
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| 198 | const int32_t *ip) |
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| 199 | { |
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| 200 | int32_t temp = htonl (*ip); |
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| 201 | |
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| 202 | if (fwrite (&temp, sizeof (int32_t), 1, (FILE *) xdrs->x_private) != 1) |
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| 203 | return FALSE; |
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| 204 | return TRUE; |
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| 205 | } |
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| 206 | |
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