xdr_mem.c revision 1.1
1 /* $NetBSD: xdr_mem.c,v 1.1 2019/06/04 15:07:55 hannken 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 #include <sys/cdefs.h> 35 #if defined(LIBC_SCCS) && !defined(lint) 36 #if 0 37 static char *sccsid = "@(#)xdr_mem.c 1.19 87/08/11 Copyr 1984 Sun Micro"; 38 static char *sccsid = "@(#)xdr_mem.c 2.1 88/07/29 4.0 RPCSRC"; 39 #else 40 __RCSID("$NetBSD: xdr_mem.c,v 1.1 2019/06/04 15:07:55 hannken Exp $"); 41 #endif 42 #endif 43 44 /* 45 * xdr_mem.h, XDR implementation using memory buffers. 46 * 47 * Copyright (C) 1984, Sun Microsystems, Inc. 48 * 49 * If you have some data to be interpreted as external data representation 50 * or to be converted to external data representation in a memory buffer, 51 * then this is the package for you. 52 * 53 */ 54 55 #include "namespace.h" 56 57 #include <sys/types.h> 58 59 #include <netinet/in.h> 60 61 #include <string.h> 62 63 #include <rpc/types.h> 64 #include <rpc/xdr.h> 65 66 #ifdef __weak_alias 67 __weak_alias(xdrmem_create,_xdrmem_create) 68 #endif 69 70 static void xdrmem_destroy(XDR *); 71 static bool_t xdrmem_getlong_aligned(XDR *, long *); 72 static bool_t xdrmem_putlong_aligned(XDR *, const long *); 73 static bool_t xdrmem_getlong_unaligned(XDR *, long *); 74 static bool_t xdrmem_putlong_unaligned(XDR *, const long *); 75 static bool_t xdrmem_getbytes(XDR *, char *, u_int); 76 static bool_t xdrmem_putbytes(XDR *, const char *, u_int); 77 /* XXX: w/64-bit pointers, u_int not enough! */ 78 static u_int xdrmem_getpos(XDR *); 79 static bool_t xdrmem_setpos(XDR *, u_int); 80 static int32_t *xdrmem_inline_aligned(XDR *, u_int); 81 static int32_t *xdrmem_inline_unaligned(XDR *, u_int); 82 static bool_t xdrmem_control(XDR *xdrs, int request, void *info); 83 84 static const struct xdr_ops xdrmem_ops_aligned = { 85 xdrmem_getlong_aligned, 86 xdrmem_putlong_aligned, 87 xdrmem_getbytes, 88 xdrmem_putbytes, 89 xdrmem_getpos, 90 xdrmem_setpos, 91 xdrmem_inline_aligned, 92 xdrmem_destroy, 93 xdrmem_control 94 }; 95 96 static const struct xdr_ops xdrmem_ops_unaligned = { 97 xdrmem_getlong_unaligned, 98 xdrmem_putlong_unaligned, 99 xdrmem_getbytes, 100 xdrmem_putbytes, 101 xdrmem_getpos, 102 xdrmem_setpos, 103 xdrmem_inline_unaligned, 104 xdrmem_destroy, 105 xdrmem_control 106 }; 107 108 /* 109 * The procedure xdrmem_create initializes a stream descriptor for a 110 * memory buffer. 111 */ 112 void 113 xdrmem_create(XDR *xdrs, char *addr, u_int size, enum xdr_op op) 114 { 115 116 xdrs->x_op = op; 117 xdrs->x_ops = ((unsigned long)addr & (sizeof(int32_t) - 1)) 118 ? &xdrmem_ops_unaligned : &xdrmem_ops_aligned; 119 xdrs->x_private = xdrs->x_base = addr; 120 xdrs->x_handy = size; 121 } 122 123 /*ARGSUSED*/ 124 static void 125 xdrmem_destroy(XDR *xdrs) 126 { 127 128 } 129 130 static bool_t 131 xdrmem_getlong_aligned(XDR *xdrs, long *lp) 132 { 133 134 if (xdrs->x_handy < sizeof(int32_t)) 135 return (FALSE); 136 xdrs->x_handy -= sizeof(int32_t); 137 *lp = ntohl(*(u_int32_t *)xdrs->x_private); 138 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 139 return (TRUE); 140 } 141 142 static bool_t 143 xdrmem_putlong_aligned(XDR *xdrs, const long *lp) 144 { 145 146 if (xdrs->x_handy < sizeof(int32_t)) 147 return (FALSE); 148 xdrs->x_handy -= sizeof(int32_t); 149 *(u_int32_t *)xdrs->x_private = htonl((u_int32_t)*lp); 150 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 151 return (TRUE); 152 } 153 154 static bool_t 155 xdrmem_getlong_unaligned(XDR *xdrs, long *lp) 156 { 157 u_int32_t l; 158 159 if (xdrs->x_handy < sizeof(int32_t)) 160 return (FALSE); 161 xdrs->x_handy -= sizeof(int32_t); 162 memmove(&l, xdrs->x_private, sizeof(int32_t)); 163 *lp = ntohl(l); 164 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 165 return (TRUE); 166 } 167 168 static bool_t 169 xdrmem_putlong_unaligned(XDR *xdrs, const long *lp) 170 { 171 u_int32_t l; 172 173 if (xdrs->x_handy < sizeof(int32_t)) 174 return (FALSE); 175 xdrs->x_handy -= sizeof(int32_t); 176 l = htonl((u_int32_t)*lp); 177 memmove(xdrs->x_private, &l, sizeof(int32_t)); 178 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 179 return (TRUE); 180 } 181 182 static bool_t 183 xdrmem_getbytes(XDR *xdrs, char *addr, u_int len) 184 { 185 186 if (xdrs->x_handy < len) 187 return (FALSE); 188 xdrs->x_handy -= len; 189 memmove(addr, xdrs->x_private, len); 190 xdrs->x_private = (char *)xdrs->x_private + len; 191 return (TRUE); 192 } 193 194 static bool_t 195 xdrmem_putbytes(XDR *xdrs, const char *addr, u_int len) 196 { 197 198 if (xdrs->x_handy < len) 199 return (FALSE); 200 xdrs->x_handy -= len; 201 memmove(xdrs->x_private, addr, len); 202 xdrs->x_private = (char *)xdrs->x_private + len; 203 return (TRUE); 204 } 205 206 static u_int 207 xdrmem_getpos(XDR *xdrs) 208 { 209 210 /* XXX w/64-bit pointers, u_int not enough! */ 211 return (u_int)((u_long)xdrs->x_private - (u_long)xdrs->x_base); 212 } 213 214 static bool_t 215 xdrmem_setpos(XDR *xdrs, u_int pos) 216 { 217 char *newaddr = xdrs->x_base + pos; 218 char *lastaddr = (char *)xdrs->x_private + xdrs->x_handy; 219 220 if ((long)newaddr > (long)lastaddr) 221 return (FALSE); 222 xdrs->x_private = newaddr; 223 xdrs->x_handy = (int)((long)lastaddr - (long)newaddr); 224 return (TRUE); 225 } 226 227 static int32_t * 228 xdrmem_inline_aligned(XDR *xdrs, u_int len) 229 { 230 int32_t *buf = 0; 231 232 if (xdrs->x_handy >= len) { 233 xdrs->x_handy -= len; 234 buf = (int32_t *)xdrs->x_private; 235 xdrs->x_private = (char *)xdrs->x_private + len; 236 } 237 return (buf); 238 } 239 240 /* ARGSUSED */ 241 static int32_t * 242 xdrmem_inline_unaligned(XDR *xdrs, u_int len) 243 { 244 245 return (0); 246 } 247 248 static bool_t 249 xdrmem_control(XDR *xdrs, int request, void *info) 250 { 251 xdr_bytesrec *xptr; 252 253 switch (request) { 254 255 case XDR_GET_BYTES_AVAIL: 256 xptr = (xdr_bytesrec *)info; 257 xptr->xc_is_last_record = TRUE; 258 xptr->xc_num_avail = xdrs->x_handy; 259 return (TRUE); 260 261 } 262 return (FALSE); 263 } 264
Indexes created Thu Sep 25 16:09:42 GMT 2025