1 /*- 2 * Copyright (c) 2009, Sun Microsystems, Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * - Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * - Redistributions in binary form must reproduce the above copyright notice, 10 * this list of conditions and the following disclaimer in the documentation 11 * and/or other materials provided with the distribution. 12 * - Neither the name of Sun Microsystems, Inc. nor the names of its 13 * contributors may be used to endorse or promote products derived 14 * from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 * 28 * from: @(#)xdr.h 1.19 87/04/22 SMI 29 * from: @(#)xdr.h 2.2 88/07/29 4.0 RPCSRC 30 * $NetBSD: xdr.h,v 1.19 2000/07/17 05:00:45 matt Exp $ 31 * $FreeBSD: src/include/rpc/xdr.h,v 1.23 2003/03/07 13:19:40 nectar Exp $ 32 */ 33 34 /* 35 * xdr.h, External Data Representation Serialization Routines. 36 * 37 * Copyright (C) 1984, Sun Microsystems, Inc. 38 */ 39 40 #ifndef _RPC_XDR_H 41 #define _RPC_XDR_H 42 #include <sys/cdefs.h> 43 44 /* 45 * XDR provides a conventional way for converting between C data 46 * types and an external bit-string representation. Library supplied 47 * routines provide for the conversion on built-in C data types. These 48 * routines and utility routines defined here are used to help implement 49 * a type encode/decode routine for each user-defined type. 50 * 51 * Each data type provides a single procedure which takes two arguments: 52 * 53 * bool_t 54 * xdrproc(xdrs, argresp) 55 * XDR *xdrs; 56 * <type> *argresp; 57 * 58 * xdrs is an instance of a XDR handle, to which or from which the data 59 * type is to be converted. argresp is a pointer to the structure to be 60 * converted. The XDR handle contains an operation field which indicates 61 * which of the operations (ENCODE, DECODE * or FREE) is to be performed. 62 * 63 * XDR_DECODE may allocate space if the pointer argresp is null. This 64 * data can be freed with the XDR_FREE operation. 65 * 66 * We write only one procedure per data type to make it easy 67 * to keep the encode and decode procedures for a data type consistent. 68 * In many cases the same code performs all operations on a user defined type, 69 * because all the hard work is done in the component type routines. 70 * decode as a series of calls on the nested data types. 71 */ 72 73 /* 74 * Xdr operations. XDR_ENCODE causes the type to be encoded into the 75 * stream. XDR_DECODE causes the type to be extracted from the stream. 76 * XDR_FREE can be used to release the space allocated by an XDR_DECODE 77 * request. 78 */ 79 enum xdr_op { 80 XDR_ENCODE=0, 81 XDR_DECODE=1, 82 XDR_FREE=2 83 }; 84 85 /* 86 * This is the number of bytes per unit of external data. 87 */ 88 #define BYTES_PER_XDR_UNIT (4) 89 #define RNDUP(x) ((((x) + BYTES_PER_XDR_UNIT - 1) / BYTES_PER_XDR_UNIT) \ 90 * BYTES_PER_XDR_UNIT) 91 92 /* 93 * The XDR handle. 94 * Contains operation which is being applied to the stream, 95 * an operations vector for the particular implementation (e.g. see xdr_mem.c), 96 * and two private fields for the use of the particular implementation. 97 */ 98 typedef struct __rpc_xdr { 99 enum xdr_op x_op; /* operation; fast additional param */ 100 const struct xdr_ops { 101 /* get a long from underlying stream */ 102 bool_t (*x_getlong)(struct __rpc_xdr *, long *); 103 /* put a long to " */ 104 bool_t (*x_putlong)(struct __rpc_xdr *, const long *); 105 /* get some bytes from " */ 106 bool_t (*x_getbytes)(struct __rpc_xdr *, char *, u_int); 107 /* put some bytes to " */ 108 bool_t (*x_putbytes)(struct __rpc_xdr *, const char *, u_int); 109 /* returns bytes off from beginning */ 110 u_int (*x_getpostn)(struct __rpc_xdr *); 111 /* lets you reposition the stream */ 112 bool_t (*x_setpostn)(struct __rpc_xdr *, u_int); 113 /* buf quick ptr to buffered data */ 114 int32_t *(*x_inline)(struct __rpc_xdr *, u_int); 115 /* free privates of this xdr_stream */ 116 void (*x_destroy)(struct __rpc_xdr *); 117 bool_t (*x_control)(struct __rpc_xdr *, int, void *); 118 } *x_ops; 119 char * x_public; /* users' data */ 120 void * x_private; /* pointer to private data */ 121 char * x_base; /* private used for position info */ 122 u_int x_handy; /* extra private word */ 123 } XDR; 124 125 /* 126 * A xdrproc_t exists for each data type which is to be encoded or decoded. 127 * 128 * The second argument to the xdrproc_t is a pointer to an opaque pointer. 129 * The opaque pointer generally points to a structure of the data type 130 * to be decoded. If this pointer is 0, then the type routines should 131 * allocate dynamic storage of the appropriate size and return it. 132 */ 133 #ifdef _KERNEL 134 typedef bool_t (*xdrproc_t)(XDR *, void *, u_int); 135 #else 136 /* 137 * XXX can't actually prototype it, because some take three args!!! 138 */ 139 typedef bool_t (*xdrproc_t)(XDR *, ...); 140 #endif 141 142 /* 143 * Operations defined on a XDR handle 144 * 145 * XDR *xdrs; 146 * long *longp; 147 * char * addr; 148 * u_int len; 149 * u_int pos; 150 */ 151 #define XDR_GETLONG(xdrs, longp) \ 152 (*(xdrs)->x_ops->x_getlong)(xdrs, longp) 153 #define xdr_getlong(xdrs, longp) \ 154 (*(xdrs)->x_ops->x_getlong)(xdrs, longp) 155 156 #define XDR_PUTLONG(xdrs, longp) \ 157 (*(xdrs)->x_ops->x_putlong)(xdrs, longp) 158 #define xdr_putlong(xdrs, longp) \ 159 (*(xdrs)->x_ops->x_putlong)(xdrs, longp) 160 161 static __inline int 162 xdr_getint32(XDR *xdrs, int32_t *ip) 163 { 164 long l; 165 166 if (!xdr_getlong(xdrs, &l)) 167 return (FALSE); 168 *ip = (int32_t)l; 169 return (TRUE); 170 } 171 172 static __inline int 173 xdr_putint32(XDR *xdrs, int32_t *ip) 174 { 175 long l; 176 177 l = (long)*ip; 178 return xdr_putlong(xdrs, &l); 179 } 180 181 #define XDR_GETINT32(xdrs, int32p) xdr_getint32(xdrs, int32p) 182 #define XDR_PUTINT32(xdrs, int32p) xdr_putint32(xdrs, int32p) 183 184 #define XDR_GETBYTES(xdrs, addr, len) \ 185 (*(xdrs)->x_ops->x_getbytes)(xdrs, addr, len) 186 #define xdr_getbytes(xdrs, addr, len) \ 187 (*(xdrs)->x_ops->x_getbytes)(xdrs, addr, len) 188 189 #define XDR_PUTBYTES(xdrs, addr, len) \ 190 (*(xdrs)->x_ops->x_putbytes)(xdrs, addr, len) 191 #define xdr_putbytes(xdrs, addr, len) \ 192 (*(xdrs)->x_ops->x_putbytes)(xdrs, addr, len) 193 194 #define XDR_GETPOS(xdrs) \ 195 (*(xdrs)->x_ops->x_getpostn)(xdrs) 196 #define xdr_getpos(xdrs) \ 197 (*(xdrs)->x_ops->x_getpostn)(xdrs) 198 199 #define XDR_SETPOS(xdrs, pos) \ 200 (*(xdrs)->x_ops->x_setpostn)(xdrs, pos) 201 #define xdr_setpos(xdrs, pos) \ 202 (*(xdrs)->x_ops->x_setpostn)(xdrs, pos) 203 204 #define XDR_INLINE(xdrs, len) \ 205 (*(xdrs)->x_ops->x_inline)(xdrs, len) 206 #define xdr_inline(xdrs, len) \ 207 (*(xdrs)->x_ops->x_inline)(xdrs, len) 208 209 #define XDR_DESTROY(xdrs) \ 210 if ((xdrs)->x_ops->x_destroy) \ 211 (*(xdrs)->x_ops->x_destroy)(xdrs) 212 #define xdr_destroy(xdrs) \ 213 if ((xdrs)->x_ops->x_destroy) \ 214 (*(xdrs)->x_ops->x_destroy)(xdrs) 215 216 #define XDR_CONTROL(xdrs, req, op) \ 217 if ((xdrs)->x_ops->x_control) \ 218 (*(xdrs)->x_ops->x_control)(xdrs, req, op) 219 #define xdr_control(xdrs, req, op) XDR_CONTROL(xdrs, req, op) 220 221 #define xdr_rpcvers(xdrs, versp) xdr_u_int32_t(xdrs, versp) 222 #define xdr_rpcprog(xdrs, progp) xdr_u_int32_t(xdrs, progp) 223 #define xdr_rpcproc(xdrs, procp) xdr_u_int32_t(xdrs, procp) 224 #define xdr_rpcprot(xdrs, protp) xdr_u_int32_t(xdrs, protp) 225 #define xdr_rpcport(xdrs, portp) xdr_u_int32_t(xdrs, portp) 226 227 /* 228 * Support struct for discriminated unions. 229 * You create an array of xdrdiscrim structures, terminated with 230 * an entry with a null procedure pointer. The xdr_union routine gets 231 * the discriminant value and then searches the array of structures 232 * for a matching value. If a match is found the associated xdr routine 233 * is called to handle that part of the union. If there is 234 * no match, then a default routine may be called. 235 * If there is no match and no default routine it is an error. 236 */ 237 #define NULL_xdrproc_t ((xdrproc_t)0) 238 struct xdr_discrim { 239 int value; 240 xdrproc_t proc; 241 }; 242 243 /* 244 * In-line routines for fast encode/decode of primitive data types. 245 * Caveat emptor: these use single memory cycles to get the 246 * data from the underlying buffer, and will fail to operate 247 * properly if the data is not aligned. The standard way to use these 248 * is to say: 249 * if ((buf = XDR_INLINE(xdrs, count)) == NULL) 250 * return (FALSE); 251 * <<< macro calls >>> 252 * where ``count'' is the number of bytes of data occupied 253 * by the primitive data types. 254 * 255 * N.B. and frozen for all time: each data type here uses 4 bytes 256 * of external representation. 257 */ 258 #define IXDR_GET_INT32(buf) ((int32_t)__ntohl((uint32_t)*(buf)++)) 259 #define IXDR_PUT_INT32(buf, v) (*(buf)++ =(int32_t)__htonl((uint32_t)v)) 260 #define IXDR_GET_U_INT32(buf) ((uint32_t)IXDR_GET_INT32(buf)) 261 #define IXDR_PUT_U_INT32(buf, v) IXDR_PUT_INT32((buf), ((int32_t)(v))) 262 263 #define IXDR_GET_LONG(buf) ((long)__ntohl((uint32_t)*(buf)++)) 264 #define IXDR_PUT_LONG(buf, v) (*(buf)++ =(int32_t)__htonl((uint32_t)v)) 265 266 #define IXDR_GET_BOOL(buf) ((bool_t)IXDR_GET_LONG(buf)) 267 #define IXDR_GET_ENUM(buf, t) ((t)IXDR_GET_LONG(buf)) 268 #define IXDR_GET_U_LONG(buf) ((u_long)IXDR_GET_LONG(buf)) 269 #define IXDR_GET_SHORT(buf) ((short)IXDR_GET_LONG(buf)) 270 #define IXDR_GET_U_SHORT(buf) ((u_short)IXDR_GET_LONG(buf)) 271 272 #define IXDR_PUT_BOOL(buf, v) IXDR_PUT_LONG((buf), (v)) 273 #define IXDR_PUT_ENUM(buf, v) IXDR_PUT_LONG((buf), (v)) 274 #define IXDR_PUT_U_LONG(buf, v) IXDR_PUT_LONG((buf), (v)) 275 #define IXDR_PUT_SHORT(buf, v) IXDR_PUT_LONG((buf), (v)) 276 #define IXDR_PUT_U_SHORT(buf, v) IXDR_PUT_LONG((buf), (v)) 277 278 /* 279 * These are the "generic" xdr routines. 280 */ 281 __BEGIN_DECLS 282 extern bool_t xdr_void(void); 283 extern bool_t xdr_int(XDR *, int *); 284 extern bool_t xdr_u_int(XDR *, u_int *); 285 extern bool_t xdr_long(XDR *, long *); 286 extern bool_t xdr_u_long(XDR *, u_long *); 287 extern bool_t xdr_short(XDR *, short *); 288 extern bool_t xdr_u_short(XDR *, u_short *); 289 extern bool_t xdr_int16_t(XDR *, int16_t *); 290 extern bool_t xdr_u_int16_t(XDR *, uint16_t *); 291 extern bool_t xdr_uint16_t(XDR *, uint16_t *); 292 extern bool_t xdr_int32_t(XDR *, int32_t *); 293 extern bool_t xdr_u_int32_t(XDR *, uint32_t *); 294 extern bool_t xdr_uint32_t(XDR *, uint32_t *); 295 extern bool_t xdr_int64_t(XDR *, int64_t *); 296 extern bool_t xdr_u_int64_t(XDR *, uint64_t *); 297 extern bool_t xdr_uint64_t(XDR *, uint64_t *); 298 extern bool_t xdr_bool(XDR *, bool_t *); 299 extern bool_t xdr_enum(XDR *, enum_t *); 300 extern bool_t xdr_array(XDR *, char **, u_int *, u_int, u_int, xdrproc_t); 301 extern bool_t xdr_bytes(XDR *, char **, u_int *, u_int); 302 extern bool_t xdr_opaque(XDR *, char *, u_int); 303 extern bool_t xdr_string(XDR *, char **, u_int); 304 extern bool_t xdr_union(XDR *, enum_t *, char *, const struct xdr_discrim *, xdrproc_t); 305 extern bool_t xdr_char(XDR *, char *); 306 extern bool_t xdr_u_char(XDR *, u_char *); 307 extern bool_t xdr_vector(XDR *, char *, u_int, u_int, xdrproc_t); 308 extern bool_t xdr_float(XDR *, float *); 309 extern bool_t xdr_double(XDR *, double *); 310 extern bool_t xdr_quadruple(XDR *, long double *); 311 extern bool_t xdr_reference(XDR *, char **, u_int, xdrproc_t); 312 extern bool_t xdr_pointer(XDR *, char **, u_int, xdrproc_t); 313 extern bool_t xdr_wrapstring(XDR *, char **); 314 extern void xdr_free(xdrproc_t, void *); 315 extern bool_t xdr_hyper(XDR *, quad_t *); 316 extern bool_t xdr_u_hyper(XDR *, u_quad_t *); 317 extern bool_t xdr_longlong_t(XDR *, quad_t *); 318 extern bool_t xdr_u_longlong_t(XDR *, u_quad_t *); 319 extern unsigned long xdr_sizeof(xdrproc_t, void *); 320 __END_DECLS 321 322 /* 323 * Common opaque bytes objects used by many rpc protocols; 324 * declared here due to commonality. 325 */ 326 #define MAX_NETOBJ_SZ 1024 327 struct netobj { 328 u_int n_len; 329 char *n_bytes; 330 }; 331 typedef struct netobj netobj; 332 extern bool_t xdr_netobj(XDR *, struct netobj *); 333 334 /* 335 * These are the public routines for the various implementations of 336 * xdr streams. 337 */ 338 __BEGIN_DECLS 339 /* XDR using memory buffers */ 340 extern void xdrmem_create(XDR *, char *, u_int, enum xdr_op); 341 342 /* XDR using stdio library */ 343 #ifdef _STDIO_H_ 344 extern void xdrstdio_create(XDR *, FILE *, enum xdr_op); 345 #endif 346 347 /* XDR pseudo records for tcp */ 348 extern void xdrrec_create(XDR *, u_int, u_int, void *, 349 int (*)(void *, void *, int), 350 int (*)(void *, void *, int)); 351 352 /* make end of xdr record */ 353 extern bool_t xdrrec_endofrecord(XDR *, int); 354 355 /* move to beginning of next record */ 356 extern bool_t xdrrec_skiprecord(XDR *); 357 358 /* true if no more input */ 359 extern bool_t xdrrec_eof(XDR *); 360 extern u_int xdrrec_readbytes(XDR *, caddr_t, u_int); 361 __END_DECLS 362 363 #endif /* !_RPC_XDR_H */ 364