1 /* $NetBSD: xdr_mem.c,v 1.17 2006/10/15 16:14:46 christos 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 #if 0 35 static char *sccsid = "@(#)xdr_mem.c 1.19 87/08/11 Copyr 1984 Sun Micro"; 36 static char *sccsid = "@(#)xdr_mem.c 2.1 88/07/29 4.0 RPCSRC"; 37 #else 38 __RCSID("$NetBSD: xdr_mem.c,v 1.17 2006/10/15 16:14:46 christos Exp $"); 39 #endif 40 #endif 41 42 /* 43 * xdr_mem.h, XDR implementation using memory buffers. 44 * 45 * Copyright (C) 1984, Sun Microsystems, Inc. 46 * 47 * If you have some data to be interpreted as external data representation 48 * or to be converted to external data representation in a memory buffer, 49 * then this is the package for you. 50 * 51 */ 52 53 #include "namespace.h" 54 55 #include <sys/types.h> 56 57 #include <netinet/in.h> 58 59 #include <string.h> 60 61 #include <rpc/types.h> 62 #include <rpc/xdr.h> 63 64 #ifdef __weak_alias 65 __weak_alias(xdrmem_create,_xdrmem_create) 66 #endif 67 68 static void xdrmem_destroy __P((XDR *)); 69 static bool_t xdrmem_getlong_aligned __P((XDR *, long *)); 70 static bool_t xdrmem_putlong_aligned __P((XDR *, const long *)); 71 static bool_t xdrmem_getlong_unaligned __P((XDR *, long *)); 72 static bool_t xdrmem_putlong_unaligned __P((XDR *, const long *)); 73 static bool_t xdrmem_getbytes __P((XDR *, char *, u_int)); 74 static bool_t xdrmem_putbytes __P((XDR *, const char *, u_int)); 75 /* XXX: w/64-bit pointers, u_int not enough! */ 76 static u_int xdrmem_getpos __P((XDR *)); 77 static bool_t xdrmem_setpos __P((XDR *, u_int)); 78 static int32_t *xdrmem_inline_aligned __P((XDR *, u_int)); 79 static int32_t *xdrmem_inline_unaligned __P((XDR *, u_int)); 80 81 static const struct xdr_ops xdrmem_ops_aligned = { 82 xdrmem_getlong_aligned, 83 xdrmem_putlong_aligned, 84 xdrmem_getbytes, 85 xdrmem_putbytes, 86 xdrmem_getpos, 87 xdrmem_setpos, 88 xdrmem_inline_aligned, 89 xdrmem_destroy, 90 NULL, /* xdrmem_control */ 91 }; 92 93 static const struct xdr_ops xdrmem_ops_unaligned = { 94 xdrmem_getlong_unaligned, 95 xdrmem_putlong_unaligned, 96 xdrmem_getbytes, 97 xdrmem_putbytes, 98 xdrmem_getpos, 99 xdrmem_setpos, 100 xdrmem_inline_unaligned, 101 xdrmem_destroy, 102 NULL, /* xdrmem_control */ 103 }; 104 105 /* 106 * The procedure xdrmem_create initializes a stream descriptor for a 107 * memory buffer. 108 */ 109 void 110 xdrmem_create(xdrs, addr, size, op) 111 XDR *xdrs; 112 char *addr; 113 u_int size; 114 enum xdr_op op; 115 { 116 117 xdrs->x_op = op; 118 xdrs->x_ops = ((unsigned long)addr & (sizeof(int32_t) - 1)) 119 ? &xdrmem_ops_unaligned : &xdrmem_ops_aligned; 120 xdrs->x_private = xdrs->x_base = addr; 121 xdrs->x_handy = size; 122 } 123 124 /*ARGSUSED*/ 125 static void 126 xdrmem_destroy(xdrs) 127 XDR *xdrs; 128 { 129 130 } 131 132 static bool_t 133 xdrmem_getlong_aligned(xdrs, lp) 134 XDR *xdrs; 135 long *lp; 136 { 137 138 if (xdrs->x_handy < sizeof(int32_t)) 139 return (FALSE); 140 xdrs->x_handy -= sizeof(int32_t); 141 *lp = ntohl(*(u_int32_t *)xdrs->x_private); 142 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 143 return (TRUE); 144 } 145 146 static bool_t 147 xdrmem_putlong_aligned(xdrs, lp) 148 XDR *xdrs; 149 const long *lp; 150 { 151 152 if (xdrs->x_handy < sizeof(int32_t)) 153 return (FALSE); 154 xdrs->x_handy -= sizeof(int32_t); 155 *(u_int32_t *)xdrs->x_private = htonl((u_int32_t)*lp); 156 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 157 return (TRUE); 158 } 159 160 static bool_t 161 xdrmem_getlong_unaligned(xdrs, lp) 162 XDR *xdrs; 163 long *lp; 164 { 165 u_int32_t l; 166 167 if (xdrs->x_handy < sizeof(int32_t)) 168 return (FALSE); 169 xdrs->x_handy -= sizeof(int32_t); 170 memmove(&l, xdrs->x_private, sizeof(int32_t)); 171 *lp = ntohl(l); 172 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 173 return (TRUE); 174 } 175 176 static bool_t 177 xdrmem_putlong_unaligned(xdrs, lp) 178 XDR *xdrs; 179 const long *lp; 180 { 181 u_int32_t l; 182 183 if (xdrs->x_handy < sizeof(int32_t)) 184 return (FALSE); 185 xdrs->x_handy -= sizeof(int32_t); 186 l = htonl((u_int32_t)*lp); 187 memmove(xdrs->x_private, &l, sizeof(int32_t)); 188 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); 189 return (TRUE); 190 } 191 192 static bool_t 193 xdrmem_getbytes(xdrs, addr, len) 194 XDR *xdrs; 195 char *addr; 196 u_int len; 197 { 198 199 if (xdrs->x_handy < len) 200 return (FALSE); 201 xdrs->x_handy -= len; 202 memmove(addr, xdrs->x_private, len); 203 xdrs->x_private = (char *)xdrs->x_private + len; 204 return (TRUE); 205 } 206 207 static bool_t 208 xdrmem_putbytes(xdrs, addr, len) 209 XDR *xdrs; 210 const char *addr; 211 u_int len; 212 { 213 214 if (xdrs->x_handy < len) 215 return (FALSE); 216 xdrs->x_handy -= len; 217 memmove(xdrs->x_private, addr, len); 218 xdrs->x_private = (char *)xdrs->x_private + len; 219 return (TRUE); 220 } 221 222 static u_int 223 xdrmem_getpos(xdrs) 224 XDR *xdrs; 225 { 226 227 /* XXX w/64-bit pointers, u_int not enough! */ 228 return (u_int)((u_long)xdrs->x_private - (u_long)xdrs->x_base); 229 } 230 231 static bool_t 232 xdrmem_setpos(xdrs, pos) 233 XDR *xdrs; 234 u_int pos; 235 { 236 char *newaddr = xdrs->x_base + pos; 237 char *lastaddr = (char *)xdrs->x_private + xdrs->x_handy; 238 239 if ((long)newaddr > (long)lastaddr) 240 return (FALSE); 241 xdrs->x_private = newaddr; 242 xdrs->x_handy = (int)((long)lastaddr - (long)newaddr); 243 return (TRUE); 244 } 245 246 static int32_t * 247 xdrmem_inline_aligned(xdrs, len) 248 XDR *xdrs; 249 u_int len; 250 { 251 int32_t *buf = 0; 252 253 if (xdrs->x_handy >= len) { 254 xdrs->x_handy -= len; 255 buf = (int32_t *)xdrs->x_private; 256 xdrs->x_private = (char *)xdrs->x_private + len; 257 } 258 return (buf); 259 } 260 261 /* ARGSUSED */ 262 static int32_t * 263 xdrmem_inline_unaligned(xdrs, len) 264 XDR *xdrs; 265 u_int len; 266 { 267 268 return (0); 269 } 270