Edit File: xdr.h
/* * xdr.h, External Data Representation Serialization Routines. * * Copyright (c) 2010, 2012, Oracle America, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * Neither the name of the "Oracle America, Inc." nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef _RPC_XDR_H #define _RPC_XDR_H 1 #include <features.h> #include <sys/types.h> #include <rpc/types.h> /* We need FILE. */ #include <stdio.h> __BEGIN_DECLS /* * XDR provides a conventional way for converting between C data * types and an external bit-string representation. Library supplied * routines provide for the conversion on built-in C data types. These * routines and utility routines defined here are used to help implement * a type encode/decode routine for each user-defined type. * * Each data type provides a single procedure which takes two arguments: * * bool_t * xdrproc(xdrs, argresp) * XDR *xdrs; * <type> *argresp; * * xdrs is an instance of a XDR handle, to which or from which the data * type is to be converted. argresp is a pointer to the structure to be * converted. The XDR handle contains an operation field which indicates * which of the operations (ENCODE, DECODE * or FREE) is to be performed. * * XDR_DECODE may allocate space if the pointer argresp is null. This * data can be freed with the XDR_FREE operation. * * We write only one procedure per data type to make it easy * to keep the encode and decode procedures for a data type consistent. * In many cases the same code performs all operations on a user defined type, * because all the hard work is done in the component type routines. * decode as a series of calls on the nested data types. */ /* * Xdr operations. XDR_ENCODE causes the type to be encoded into the * stream. XDR_DECODE causes the type to be extracted from the stream. * XDR_FREE can be used to release the space allocated by an XDR_DECODE * request. */ enum xdr_op { XDR_ENCODE = 0, XDR_DECODE = 1, XDR_FREE = 2 }; /* * This is the number of bytes per unit of external data. */ #define BYTES_PER_XDR_UNIT (4) /* * This only works if the above is a power of 2. But it's defined to be * 4 by the appropriate RFCs. So it will work. And it's normally quicker * than the old routine. */ #if 1 #define RNDUP(x) (((x) + BYTES_PER_XDR_UNIT - 1) & ~(BYTES_PER_XDR_UNIT - 1)) #else /* this is the old routine */ #define RNDUP(x) ((((x) + BYTES_PER_XDR_UNIT - 1) / BYTES_PER_XDR_UNIT) \ * BYTES_PER_XDR_UNIT) #endif /* * The XDR handle. * Contains operation which is being applied to the stream, * an operations vector for the particular implementation (e.g. see xdr_mem.c), * and two private fields for the use of the particular implementation. */ typedef struct XDR XDR; struct XDR { enum xdr_op x_op; /* operation; fast additional param */ struct xdr_ops { bool_t (*x_getlong) (XDR *__xdrs, long *__lp); /* get a long from underlying stream */ bool_t (*x_putlong) (XDR *__xdrs, const long *__lp); /* put a long to " */ bool_t (*x_getbytes) (XDR *__xdrs, caddr_t __addr, u_int __len); /* get some bytes from " */ bool_t (*x_putbytes) (XDR *__xdrs, const char *__addr, u_int __len); /* put some bytes to " */ u_int (*x_getpostn) (const XDR *__xdrs); /* returns bytes off from beginning */ bool_t (*x_setpostn) (XDR *__xdrs, u_int __pos); /* lets you reposition the stream */ int32_t *(*x_inline) (XDR *__xdrs, u_int __len); /* buf quick ptr to buffered data */ void (*x_destroy) (XDR *__xdrs); /* free privates of this xdr_stream */ bool_t (*x_getint32) (XDR *__xdrs, int32_t *__ip); /* get a int from underlying stream */ bool_t (*x_putint32) (XDR *__xdrs, const int32_t *__ip); /* put a int to " */ } *x_ops; caddr_t x_public; /* users' data */ caddr_t x_private; /* pointer to private data */ caddr_t x_base; /* private used for position info */ u_int x_handy; /* extra private word */ }; /* * A xdrproc_t exists for each data type which is to be encoded or decoded. * * The second argument to the xdrproc_t is a pointer to an opaque pointer. * The opaque pointer generally points to a structure of the data type * to be decoded. If this pointer is 0, then the type routines should * allocate dynamic storage of the appropriate size and return it. * bool_t (*xdrproc_t)(XDR *, caddr_t *); */ typedef bool_t (*xdrproc_t) (XDR *, void *,...); /* * Operations defined on a XDR handle * * XDR *xdrs; * int32_t *int32p; * long *longp; * caddr_t addr; * u_int len; * u_int pos; */ #define XDR_GETINT32(xdrs, int32p) \ (*(xdrs)->x_ops->x_getint32)(xdrs, int32p) #define xdr_getint32(xdrs, int32p) \ (*(xdrs)->x_ops->x_getint32)(xdrs, int32p) #define XDR_PUTINT32(xdrs, int32p) \ (*(xdrs)->x_ops->x_putint32)(xdrs, int32p) #define xdr_putint32(xdrs, int32p) \ (*(xdrs)->x_ops->x_putint32)(xdrs, int32p) #define XDR_GETLONG(xdrs, longp) \ (*(xdrs)->x_ops->x_getlong)(xdrs, longp) #define xdr_getlong(xdrs, longp) \ (*(xdrs)->x_ops->x_getlong)(xdrs, longp) #define XDR_PUTLONG(xdrs, longp) \ (*(xdrs)->x_ops->x_putlong)(xdrs, longp) #define xdr_putlong(xdrs, longp) \ (*(xdrs)->x_ops->x_putlong)(xdrs, longp) #define XDR_GETBYTES(xdrs, addr, len) \ (*(xdrs)->x_ops->x_getbytes)(xdrs, addr, len) #define xdr_getbytes(xdrs, addr, len) \ (*(xdrs)->x_ops->x_getbytes)(xdrs, addr, len) #define XDR_PUTBYTES(xdrs, addr, len) \ (*(xdrs)->x_ops->x_putbytes)(xdrs, addr, len) #define xdr_putbytes(xdrs, addr, len) \ (*(xdrs)->x_ops->x_putbytes)(xdrs, addr, len) #define XDR_GETPOS(xdrs) \ (*(xdrs)->x_ops->x_getpostn)(xdrs) #define xdr_getpos(xdrs) \ (*(xdrs)->x_ops->x_getpostn)(xdrs) #define XDR_SETPOS(xdrs, pos) \ (*(xdrs)->x_ops->x_setpostn)(xdrs, pos) #define xdr_setpos(xdrs, pos) \ (*(xdrs)->x_ops->x_setpostn)(xdrs, pos) #define XDR_INLINE(xdrs, len) \ (*(xdrs)->x_ops->x_inline)(xdrs, len) #define xdr_inline(xdrs, len) \ (*(xdrs)->x_ops->x_inline)(xdrs, len) #define XDR_DESTROY(xdrs) \ do { \ if ((xdrs)->x_ops->x_destroy) \ (*(xdrs)->x_ops->x_destroy)(xdrs); \ } while (0) #define xdr_destroy(xdrs) \ do { \ if ((xdrs)->x_ops->x_destroy) \ (*(xdrs)->x_ops->x_destroy)(xdrs); \ } while (0) /* * Support struct for discriminated unions. * You create an array of xdrdiscrim structures, terminated with * a entry with a null procedure pointer. The xdr_union routine gets * the discriminant value and then searches the array of structures * for a matching value. If a match is found the associated xdr routine * is called to handle that part of the union. If there is * no match, then a default routine may be called. * If there is no match and no default routine it is an error. */ #define NULL_xdrproc_t ((xdrproc_t)0) struct xdr_discrim { int value; xdrproc_t proc; }; /* * Inline routines for fast encode/decode of primitive data types. * Caveat emptor: these use single memory cycles to get the * data from the underlying buffer, and will fail to operate * properly if the data is not aligned. The standard way to use these * is to say: * if ((buf = XDR_INLINE(xdrs, count)) == NULL) * return (FALSE); * <<< macro calls >>> * where ``count'' is the number of bytes of data occupied * by the primitive data types. * * N.B. and frozen for all time: each data type here uses 4 bytes * of external representation. */ #define IXDR_GET_INT32(buf) ((int32_t)ntohl((uint32_t)*(buf)++)) #define IXDR_PUT_INT32(buf, v) (*(buf)++ = (int32_t)htonl((uint32_t)(v))) #define IXDR_GET_U_INT32(buf) ((uint32_t)IXDR_GET_INT32(buf)) #define IXDR_PUT_U_INT32(buf, v) IXDR_PUT_INT32(buf, (int32_t)(v)) /* WARNING: The IXDR_*_LONG defines are removed by Sun for new platforms * and shouldn't be used any longer. Code which use this defines or longs * in the RPC code will not work on 64bit Solaris platforms ! */ #define IXDR_GET_LONG(buf) ((long)IXDR_GET_U_INT32(buf)) #define IXDR_PUT_LONG(buf, v) ((long)IXDR_PUT_INT32(buf, (long)(v))) #define IXDR_GET_U_LONG(buf) ((u_long)IXDR_GET_LONG(buf)) #define IXDR_PUT_U_LONG(buf, v) IXDR_PUT_LONG(buf, (long)(v)) #define IXDR_GET_BOOL(buf) ((bool_t)IXDR_GET_LONG(buf)) #define IXDR_GET_ENUM(buf, t) ((t)IXDR_GET_LONG(buf)) #define IXDR_GET_SHORT(buf) ((short)IXDR_GET_LONG(buf)) #define IXDR_GET_U_SHORT(buf) ((u_short)IXDR_GET_LONG(buf)) #define IXDR_PUT_BOOL(buf, v) IXDR_PUT_LONG(buf, (long)(v)) #define IXDR_PUT_ENUM(buf, v) IXDR_PUT_LONG(buf, (long)(v)) #define IXDR_PUT_SHORT(buf, v) IXDR_PUT_LONG(buf, (long)(v)) #define IXDR_PUT_U_SHORT(buf, v) IXDR_PUT_LONG(buf, (long)(v)) /* * These are the "generic" xdr routines. * None of these can have const applied because it's not possible to * know whether the call is a read or a write to the passed parameter * also, the XDR structure is always updated by some of these calls. */ extern bool_t xdr_void (void) __THROW; extern bool_t xdr_short (XDR *__xdrs, short *__sp) __THROW; extern bool_t xdr_u_short (XDR *__xdrs, u_short *__usp) __THROW; extern bool_t xdr_int (XDR *__xdrs, int *__ip) __THROW; extern bool_t xdr_u_int (XDR *__xdrs, u_int *__up) __THROW; extern bool_t xdr_long (XDR *__xdrs, long *__lp) __THROW; extern bool_t xdr_u_long (XDR *__xdrs, u_long *__ulp) __THROW; extern bool_t xdr_hyper (XDR *__xdrs, quad_t *__llp) __THROW; extern bool_t xdr_u_hyper (XDR *__xdrs, u_quad_t *__ullp) __THROW; extern bool_t xdr_longlong_t (XDR *__xdrs, quad_t *__llp) __THROW; extern bool_t xdr_u_longlong_t (XDR *__xdrs, u_quad_t *__ullp) __THROW; extern bool_t xdr_int8_t (XDR *__xdrs, int8_t *__ip) __THROW; extern bool_t xdr_uint8_t (XDR *__xdrs, uint8_t *__up) __THROW; extern bool_t xdr_int16_t (XDR *__xdrs, int16_t *__ip) __THROW; extern bool_t xdr_uint16_t (XDR *__xdrs, uint16_t *__up) __THROW; extern bool_t xdr_int32_t (XDR *__xdrs, int32_t *__ip) __THROW; extern bool_t xdr_uint32_t (XDR *__xdrs, uint32_t *__up) __THROW; extern bool_t xdr_int64_t (XDR *__xdrs, int64_t *__ip) __THROW; extern bool_t xdr_uint64_t (XDR *__xdrs, uint64_t *__up) __THROW; extern bool_t xdr_quad_t (XDR *__xdrs, quad_t *__ip) __THROW; extern bool_t xdr_u_quad_t (XDR *__xdrs, u_quad_t *__up) __THROW; extern bool_t xdr_bool (XDR *__xdrs, bool_t *__bp) __THROW; extern bool_t xdr_enum (XDR *__xdrs, enum_t *__ep) __THROW; extern bool_t xdr_array (XDR * _xdrs, caddr_t *__addrp, u_int *__sizep, u_int __maxsize, u_int __elsize, xdrproc_t __elproc) __THROW; extern bool_t xdr_bytes (XDR *__xdrs, char **__cpp, u_int *__sizep, u_int __maxsize) __THROW; extern bool_t xdr_opaque (XDR *__xdrs, caddr_t __cp, u_int __cnt) __THROW; extern bool_t xdr_string (XDR *__xdrs, char **__cpp, u_int __maxsize) __THROW; extern bool_t xdr_union (XDR *__xdrs, enum_t *__dscmp, char *__unp, const struct xdr_discrim *__choices, xdrproc_t __dfault) __THROW; extern bool_t xdr_char (XDR *__xdrs, char *__cp) __THROW; extern bool_t xdr_u_char (XDR *__xdrs, u_char *__cp) __THROW; extern bool_t xdr_vector (XDR *__xdrs, char *__basep, u_int __nelem, u_int __elemsize, xdrproc_t __xdr_elem) __THROW; extern bool_t xdr_float (XDR *__xdrs, float *__fp) __THROW; extern bool_t xdr_double (XDR *__xdrs, double *__dp) __THROW; extern bool_t xdr_reference (XDR *__xdrs, caddr_t *__xpp, u_int __size, xdrproc_t __proc) __THROW; extern bool_t xdr_pointer (XDR *__xdrs, char **__objpp, u_int __obj_size, xdrproc_t __xdr_obj) __THROW; extern bool_t xdr_wrapstring (XDR *__xdrs, char **__cpp) __THROW; extern u_long xdr_sizeof (xdrproc_t, void *) __THROW; /* * Common opaque bytes objects used by many rpc protocols; * declared here due to commonality. */ #define MAX_NETOBJ_SZ 1024 struct netobj { u_int n_len; char *n_bytes; }; typedef struct netobj netobj; extern bool_t xdr_netobj (XDR *__xdrs, struct netobj *__np) __THROW; /* * These are the public routines for the various implementations of * xdr streams. */ /* XDR using memory buffers */ extern void xdrmem_create (XDR *__xdrs, const caddr_t __addr, u_int __size, enum xdr_op __xop) __THROW; /* XDR using stdio library */ extern void xdrstdio_create (XDR *__xdrs, FILE *__file, enum xdr_op __xop) __THROW; /* XDR pseudo records for tcp */ extern void xdrrec_create (XDR *__xdrs, u_int __sendsize, u_int __recvsize, caddr_t __tcp_handle, int (*__readit) (char *, char *, int), int (*__writeit) (char *, char *, int)) __THROW; /* make end of xdr record */ extern bool_t xdrrec_endofrecord (XDR *__xdrs, bool_t __sendnow) __THROW; /* move to beginning of next record */ extern bool_t xdrrec_skiprecord (XDR *__xdrs) __THROW; /* true if no more input */ extern bool_t xdrrec_eof (XDR *__xdrs) __THROW; /* free memory buffers for xdr */ extern void xdr_free (xdrproc_t __proc, char *__objp) __THROW; __END_DECLS #endif /* rpc/xdr.h */