| 1 | /* |
| 2 | * Sun RPC is a product of Sun Microsystems, Inc. and is provided for |
| 3 | * unrestricted use provided that this legend is included on all tape |
| 4 | * media and as a part of the software program in whole or part. Users |
| 5 | * may copy or modify Sun RPC without charge, but are not authorized |
| 6 | * to license or distribute it to anyone else except as part of a product or |
| 7 | * program developed by the user. |
| 8 | * |
| 9 | * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE |
| 10 | * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR |
| 11 | * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. |
| 12 | * |
| 13 | * Sun RPC is provided with no support and without any obligation on the |
| 14 | * part of Sun Microsystems, Inc. to assist in its use, correction, |
| 15 | * modification or enhancement. |
| 16 | * |
| 17 | * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE |
| 18 | * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC |
| 19 | * OR ANY PART THEREOF. |
| 20 | * |
| 21 | * In no event will Sun Microsystems, Inc. be liable for any lost revenue |
| 22 | * or profits or other special, indirect and consequential damages, even if |
| 23 | * Sun has been advised of the possibility of such damages. |
| 24 | * |
| 25 | * Sun Microsystems, Inc. |
| 26 | * 2550 Garcia Avenue |
| 27 | * Mountain View, California 94043 |
| 28 | */ |
| 29 | |
| 30 | #if defined(LIBC_SCCS) && !defined(lint) |
| 31 | /*static char *sccsid = "from: @(#)xdr_mem.c 1.19 87/08/11 Copyr 1984 Sun Micro";*/ |
| 32 | /*static char *sccsid = "from: @(#)xdr_mem.c 2.1 88/07/29 4.0 RPCSRC";*/ |
| 33 | static char *rcsid = "$Id: xdr_mem.c,v 1.3 1993/08/26 00:53:50 jtc Exp $"; |
| 34 | #endif |
| 35 | |
| 36 | /* |
| 37 | * xdr_mem.h, XDR implementation using memory buffers. |
| 38 | * |
| 39 | * Copyright (C) 1984, Sun Microsystems, Inc. |
| 40 | * |
| 41 | * If you have some data to be interpreted as external data representation |
| 42 | * or to be converted to external data representation in a memory buffer, |
| 43 | * then this is the package for you. |
| 44 | * |
| 45 | */ |
| 46 | |
| 47 | |
| 48 | #include <rpc/types.h> |
| 49 | #include <rpc/xdr.h> |
| 50 | #include <netinet/in.h> |
| 51 | |
| 52 | static bool_t xdrmem_getlong(); |
| 53 | static bool_t xdrmem_putlong(); |
| 54 | static bool_t xdrmem_getbytes(); |
| 55 | static bool_t xdrmem_putbytes(); |
| 56 | static u_int xdrmem_getpos(); |
| 57 | static bool_t xdrmem_setpos(); |
| 58 | static long * xdrmem_inline(); |
| 59 | static void xdrmem_destroy(); |
| 60 | |
| 61 | static struct xdr_ops xdrmem_ops = { |
| 62 | xdrmem_getlong, |
| 63 | xdrmem_putlong, |
| 64 | xdrmem_getbytes, |
| 65 | xdrmem_putbytes, |
| 66 | xdrmem_getpos, |
| 67 | xdrmem_setpos, |
| 68 | xdrmem_inline, |
| 69 | xdrmem_destroy |
| 70 | }; |
| 71 | |
| 72 | /* |
| 73 | * The procedure xdrmem_create initializes a stream descriptor for a |
| 74 | * memory buffer. |
| 75 | */ |
| 76 | void |
| 77 | xdrmem_create(xdrs, addr, size, op) |
| 78 | register XDR *xdrs; |
| 79 | caddr_t addr; |
| 80 | u_int size; |
| 81 | enum xdr_op op; |
| 82 | { |
| 83 | |
| 84 | xdrs->x_op = op; |
| 85 | xdrs->x_ops = &xdrmem_ops; |
| 86 | xdrs->x_private = xdrs->x_base = addr; |
| 87 | xdrs->x_handy = size; |
| 88 | } |
| 89 | |
| 90 | static void |
| 91 | xdrmem_destroy(/*xdrs*/) |
| 92 | /*XDR *xdrs;*/ |
| 93 | { |
| 94 | } |
| 95 | |
| 96 | static bool_t |
| 97 | xdrmem_getlong(xdrs, lp) |
| 98 | register XDR *xdrs; |
| 99 | long *lp; |
| 100 | { |
| 101 | |
| 102 | if ((xdrs->x_handy -= sizeof(long)) < 0) |
| 103 | return (FALSE); |
| 104 | *lp = (long)ntohl((u_long)(*((long *)(xdrs->x_private)))); |
| 105 | xdrs->x_private += sizeof(long); |
| 106 | return (TRUE); |
| 107 | } |
| 108 | |
| 109 | static bool_t |
| 110 | xdrmem_putlong(xdrs, lp) |
| 111 | register XDR *xdrs; |
| 112 | long *lp; |
| 113 | { |
| 114 | |
| 115 | if ((xdrs->x_handy -= sizeof(long)) < 0) |
| 116 | return (FALSE); |
| 117 | *(long *)xdrs->x_private = (long)htonl((u_long)(*lp)); |
| 118 | xdrs->x_private += sizeof(long); |
| 119 | return (TRUE); |
| 120 | } |
| 121 | |
| 122 | static bool_t |
| 123 | xdrmem_getbytes(xdrs, addr, len) |
| 124 | register XDR *xdrs; |
| 125 | caddr_t addr; |
| 126 | register u_int len; |
| 127 | { |
| 128 | |
| 129 | if ((xdrs->x_handy -= len) < 0) |
| 130 | return (FALSE); |
| 131 | bcopy(xdrs->x_private, addr, len); |
| 132 | xdrs->x_private += len; |
| 133 | return (TRUE); |
| 134 | } |
| 135 | |
| 136 | static bool_t |
| 137 | xdrmem_putbytes(xdrs, addr, len) |
| 138 | register XDR *xdrs; |
| 139 | caddr_t addr; |
| 140 | register u_int len; |
| 141 | { |
| 142 | |
| 143 | if ((xdrs->x_handy -= len) < 0) |
| 144 | return (FALSE); |
| 145 | bcopy(addr, xdrs->x_private, len); |
| 146 | xdrs->x_private += len; |
| 147 | return (TRUE); |
| 148 | } |
| 149 | |
| 150 | static u_int |
| 151 | xdrmem_getpos(xdrs) |
| 152 | register XDR *xdrs; |
| 153 | { |
| 154 | |
| 155 | return ((u_int)xdrs->x_private - (u_int)xdrs->x_base); |
| 156 | } |
| 157 | |
| 158 | static bool_t |
| 159 | xdrmem_setpos(xdrs, pos) |
| 160 | register XDR *xdrs; |
| 161 | u_int pos; |
| 162 | { |
| 163 | register caddr_t newaddr = xdrs->x_base + pos; |
| 164 | register caddr_t lastaddr = xdrs->x_private + xdrs->x_handy; |
| 165 | |
| 166 | if ((long)newaddr > (long)lastaddr) |
| 167 | return (FALSE); |
| 168 | xdrs->x_private = newaddr; |
| 169 | xdrs->x_handy = (int)lastaddr - (int)newaddr; |
| 170 | return (TRUE); |
| 171 | } |
| 172 | |
| 173 | static long * |
| 174 | xdrmem_inline(xdrs, len) |
| 175 | register XDR *xdrs; |
| 176 | int len; |
| 177 | { |
| 178 | long *buf = 0; |
| 179 | |
| 180 | if (xdrs->x_handy >= len) { |
| 181 | xdrs->x_handy -= len; |
| 182 | buf = (long *) xdrs->x_private; |
| 183 | xdrs->x_private += len; |
| 184 | } |
| 185 | return (buf); |
| 186 | } |