| /* $NetBSD: xdr.h,v 1.19 2000/07/17 05:00:45 matt Exp $ */ |
| |
| /* |
| * Copyright (c) 2009, Sun Microsystems, Inc. |
| * All rights reserved. |
| * |
| * 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 Sun Microsystems, 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. |
| * |
| * from: @(#)xdr.h 1.19 87/04/22 SMI |
| * from: @(#)xdr.h 2.2 88/07/29 4.0 RPCSRC |
| * $FreeBSD: src/include/rpc/xdr.h,v 1.23 2003/03/07 13:19:40 nectar Exp $ |
| */ |
| |
| /* |
| * xdr.h, External Data Representation Serialization Routines. |
| * |
| * Copyright (C) 1984, Sun Microsystems, Inc. |
| */ |
| |
| #ifndef _TIRPC_XDR_H |
| #define _TIRPC_XDR_H |
| |
| #include <sys/cdefs.h> |
| #include <misc/stdio.h> |
| #include <stdbool.h> |
| #if !defined(_WIN32) |
| #include <netinet/in.h> |
| #endif |
| #include <rpc/types.h> |
| |
| /* |
| * 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 |
| * 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) |
| /* Taken verbatim from a system xdr.h, which carries a BSD-style |
| * license (Matt) */ |
| /* |
| * 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 |
| |
| #define XBS_FLAG_NONE 0x0000 |
| #define XBS_FLAG_GIFT 0x0001 |
| |
| /* XDR buffer descriptors. */ |
| typedef struct rpc_buffer { |
| void *xb_base; |
| int xb_len; |
| u_int xb_flags; |
| void *xb_p1; /* XDR private data */ |
| void *xb_u1; /* User data */ |
| } xdr_buffer; |
| |
| typedef struct rpc_buffers { |
| xdr_buffer *xbs_buf; /* array of buffers */ |
| int xbs_cnt; /* count of buffers */ |
| size_t xbs_offset; /* not used (yet) */ |
| size_t xbs_resid; /* residual bytes */ |
| u_int xbs_flags; |
| void *xbs_p1; |
| void *xbs_u1; |
| } xdr_uio; |
| |
| /* Op flags */ |
| #define XDR_PUTBUFS_FLAG_NONE 0x0000 |
| #define XDR_PUTBUFS_FLAG_BRELE 0x0001 |
| |
| /* |
| * 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 rpc_xdr { |
| enum xdr_op x_op; /* operation; fast additional param */ |
| const struct xdr_ops { |
| /* get a long from underlying stream */ |
| bool (*x_getlong)(struct rpc_xdr *, long *); |
| /* put a long to " */ |
| bool (*x_putlong)(struct rpc_xdr *, const long *); |
| /* get some bytes from " */ |
| bool (*x_getbytes)(struct rpc_xdr *, char *, u_int); |
| /* put some bytes to " */ |
| bool (*x_putbytes)(struct rpc_xdr *, const char *, u_int); |
| /* returns bytes off from beginning */ |
| u_int (*x_getpostn)(struct rpc_xdr *); |
| /* lets you reposition the stream */ |
| bool (*x_setpostn)(struct rpc_xdr *, u_int); |
| /* buf quick ptr to buffered data */ |
| int32_t *(*x_inline)(struct rpc_xdr *, u_int); |
| /* free private resources of this xdr_stream */ |
| void (*x_destroy)(struct rpc_xdr *); |
| bool (*x_control)(struct rpc_xdr *, int, void *); |
| /* new vector and refcounted interfaces */ |
| bool (*x_getbufs)(struct rpc_xdr *, xdr_uio *, u_int, u_int); |
| bool (*x_putbufs)(struct rpc_xdr *, xdr_uio *, u_int); |
| } *x_ops; |
| void *x_public; /* users' data */ |
| void *x_private; /* pointer to private data */ |
| void *x_lib[2]; /* RPC library private */ |
| void *x_base; /* private used for position info */ |
| u_int x_handy; /* extra private word */ |
| } XDR; |
| |
| /* |
| * 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. |
| */ |
| #ifdef _KERNEL |
| typedef bool (*xdrproc_t)(XDR *, void *, u_int); |
| #else |
| /* |
| * XXX can't actually prototype it, because some take three args!!! |
| */ |
| typedef bool (*xdrproc_t)(XDR *, ...); |
| #endif |
| |
| /* |
| * Operations defined on a XDR handle |
| * |
| * XDR *xdrs; |
| * long *longp; |
| * char * addr; |
| * u_int len; |
| * u_int pos; |
| */ |
| #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) |
| |
| static __inline int |
| xdr_getint32(XDR *xdrs, int32_t *ip) |
| { |
| long l; |
| |
| if (!xdr_getlong(xdrs, &l)) |
| return (FALSE); |
| *ip = (int32_t)l; |
| return (TRUE); |
| } |
| |
| static __inline int |
| xdr_putint32(XDR *xdrs, int32_t *ip) |
| { |
| long l; |
| |
| l = (long)*ip; |
| return xdr_putlong(xdrs, &l); |
| } |
| |
| #define XDR_GETINT32(xdrs, int32p) xdr_getint32(xdrs, int32p) |
| #define XDR_PUTINT32(xdrs, int32p) xdr_putint32(xdrs, int32p) |
| |
| #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_GETBUFS(xdrs, uio, len, flags) \ |
| (*(xdrs)->x_ops->x_getbufs)(xdrs, uio, len, flags) |
| #define xdr_getbufs(xdrs, uio, len, flags) \ |
| (*(xdrs)->x_ops->x_getbufs)(xdrs, uio, len, flags) |
| |
| #define XDR_PUTBUFS(xdrs, uio, len, flags) \ |
| (*(xdrs)->x_ops->x_putbufs)(xdrs, uio, len, flags) |
| #define xdr_putbufs(xdrs, uio, len, flags) \ |
| (*(xdrs)->x_ops->x_putbufs)(xdrs, uio, len, flags) |
| |
| #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) \ |
| if ((xdrs)->x_ops->x_destroy) \ |
| (*(xdrs)->x_ops->x_destroy)(xdrs) |
| #define xdr_destroy(xdrs) \ |
| if ((xdrs)->x_ops->x_destroy) \ |
| (*(xdrs)->x_ops->x_destroy)(xdrs) |
| |
| #define XDR_CONTROL(xdrs, req, op) \ |
| if ((xdrs)->x_ops->x_control) \ |
| (*(xdrs)->x_ops->x_control)(xdrs, req, op) |
| #define xdr_control(xdrs, req, op) XDR_CONTROL(xdrs, req, op) |
| |
| /* |
| * Solaris strips the '_t' from these types -- not sure why. |
| * But, let's be compatible. |
| */ |
| #define xdr_rpcvers(xdrs, versp) xdr_u_int32(xdrs, versp) |
| #define xdr_rpcprog(xdrs, progp) xdr_u_int32(xdrs, progp) |
| #define xdr_rpcproc(xdrs, procp) xdr_u_int32(xdrs, procp) |
| #define xdr_rpcprot(xdrs, protp) xdr_u_int32(xdrs, protp) |
| #define xdr_rpcport(xdrs, portp) xdr_u_int32(xdrs, portp) |
| |
| /* |
| * Support struct for discriminated unions. |
| * You create an array of xdrdiscrim structures, terminated with |
| * an 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; |
| }; |
| |
| /* |
| * In-line 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((u_int32_t)*(buf)++)) |
| #define IXDR_PUT_INT32(buf, v) (*(buf)++ =(int32_t)htonl((u_int32_t)v)) |
| #define IXDR_GET_U_INT32(buf) ((u_int32_t)IXDR_GET_INT32(buf)) |
| #define IXDR_PUT_U_INT32(buf, v) IXDR_PUT_INT32((buf), ((int32_t)(v))) |
| |
| #define IXDR_GET_LONG(buf) ((long)ntohl((u_int32_t)*(buf)++)) |
| #define IXDR_PUT_LONG(buf, v) (*(buf)++ =(int32_t)htonl((u_int32_t)v)) |
| |
| #define IXDR_GET_BOOL(buf) ((bool)IXDR_GET_LONG(buf)) |
| #define IXDR_GET_ENUM(buf, t) ((t)IXDR_GET_LONG(buf)) |
| #define IXDR_GET_U_LONG(buf) ((u_long)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), (v)) |
| #define IXDR_PUT_ENUM(buf, v) IXDR_PUT_LONG((buf), (v)) |
| #define IXDR_PUT_U_LONG(buf, v) IXDR_PUT_LONG((buf), (v)) |
| #define IXDR_PUT_SHORT(buf, v) IXDR_PUT_LONG((buf), (v)) |
| #define IXDR_PUT_U_SHORT(buf, v) IXDR_PUT_LONG((buf), (v)) |
| |
| |
| /* |
| * These are the "generic" xdr routines. |
| */ |
| __BEGIN_DECLS |
| extern bool xdr_void(void); |
| extern bool xdr_int(XDR *, int *); |
| extern bool xdr_u_int(XDR *, u_int *); |
| extern bool xdr_long(XDR *, long *); |
| extern bool xdr_u_long(XDR *, u_long *); |
| extern bool xdr_short(XDR *, short *); |
| extern bool xdr_u_short(XDR *, u_short *); |
| extern bool xdr_int16_t(XDR *, int16_t *); |
| extern bool xdr_u_int16_t(XDR *, u_int16_t *); |
| extern bool xdr_int32_t(XDR *, int32_t *); |
| extern bool xdr_u_int32_t(XDR *, u_int32_t *); |
| extern bool xdr_uint32_t(XDR *, u_int32_t *); |
| extern bool xdr_int64_t(XDR *, int64_t *); |
| extern bool xdr_u_int64_t(XDR *, u_int64_t *); |
| extern bool xdr_uint64_t(XDR *, u_int64_t *); |
| extern bool xdr_bool(XDR *, bool_t *); |
| extern bool xdr_enum(XDR *, enum_t *); |
| extern bool xdr_array(XDR *, char **, u_int *, u_int, u_int, xdrproc_t); |
| extern bool xdr_bytes(XDR *, char **, u_int *, u_int); |
| extern bool xdr_opaque(XDR *, char *, u_int); |
| extern bool xdr_string(XDR *, char **, u_int); |
| extern bool xdr_union(XDR *, enum_t *, char *, const struct xdr_discrim *, |
| xdrproc_t); |
| extern bool xdr_char(XDR *, char *); |
| extern bool xdr_u_char(XDR *, u_char *); |
| extern bool xdr_vector(XDR *, char *, u_int, u_int, xdrproc_t); |
| extern bool xdr_float(XDR *, float *); |
| extern bool xdr_double(XDR *, double *); |
| extern bool xdr_quadruple(XDR *, long double *); |
| extern bool xdr_reference(XDR *, char **, u_int, xdrproc_t); |
| extern bool xdr_pointer(XDR *, char **, u_int, xdrproc_t); |
| extern bool xdr_wrapstring(XDR *, char **); |
| extern void xdr_free(xdrproc_t, void *); |
| extern bool xdr_hyper(XDR *, quad_t *); |
| extern bool xdr_u_hyper(XDR *, u_quad_t *); |
| extern bool xdr_longlong_t(XDR *, quad_t *); |
| extern bool xdr_u_longlong_t(XDR *, u_quad_t *); |
| |
| #define xdr_quad_t xdr_int64_t |
| #define xdr_uquad_t xdr_uint64_t |
| |
| __END_DECLS |
| |
| /* |
| * 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 xdr_netobj(XDR *, struct netobj *); |
| |
| /* |
| * These are the public routines for the various implementations of |
| * xdr streams. |
| */ |
| __BEGIN_DECLS |
| /* XDR using memory buffers */ |
| extern void xdrmem_create(XDR *, char *, u_int, enum xdr_op); |
| |
| /* XDR using stdio library */ |
| extern void xdrstdio_create(XDR *, FILE *, enum xdr_op); |
| |
| /* XDR pseudo records for tcp */ |
| extern void xdrrec_create(XDR *, u_int, u_int, void *, |
| int (*)(XDR *xdrs, void *, void *, int), |
| int (*)(XDR *xdrs, void *, void *, int)); |
| |
| /* make end of xdr record */ |
| extern bool xdrrec_endofrecord(XDR *, bool); |
| |
| /* move to beginning of next record */ |
| extern bool xdrrec_skiprecord(XDR *); |
| |
| /* true if no more input */ |
| extern bool xdrrec_eof(XDR *); |
| |
| __END_DECLS |
| |
| #endif /* !_TIRPC_XDR_H */ |