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- #ifndef RPC_XDR_H
- #define RPC_XDR_H
- /*
- * $Id: xdr.h,v 1.1.1.1 2001/11/26 22:21:20 tboeckel Exp $
- *
- * External Data Representation Serialization Routines.
- *
- * Copyright © 1994 AmiTCP/IP Group,
- * Network Solutions Development Inc.
- * All rights reserved.
- *
- */
- /* @(#)xdr.h 2.2 88/07/29 4.0 RPCSRC */
- /* @(#)xdr.h 1.19 87/04/22 SMI */
-
- /*
- * Copyright (C) 1984, Sun Microsystems, Inc.
- */
-
- #include <stdio.h> /* for the FILE* */
- /*
- * 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)
- #define RNDUP(x) ((((x) + BYTES_PER_XDR_UNIT - 1) / BYTES_PER_XDR_UNIT) \
- * BYTES_PER_XDR_UNIT)
-
- /*
- * The XDR handle.
- * Contains operation which is being applied to the stream,
- * an operations vector for the paticular implementation (e.g. see xdr_mem.c),
- * and two private fields for the use of the particular impelementation.
- */
- typedef struct XDR {
- enum xdr_op x_op; /* operation; fast additional param */
- struct xdr_ops {
- bool_t (*x_getlong)(struct XDR *xdrs, long *longp); /* get a long from underlying stream */
- bool_t (*x_putlong)(struct XDR *xdrs, long *longp); /* put a long to " */
- bool_t (*x_getbytes)(struct XDR *xdrs, caddr_t addr,
- u_int len);/* get some bytes from " */
- bool_t (*x_putbytes)(struct XDR *xdrs, caddr_t addr,
- u_int len);/* put some bytes to " */
- u_int (*x_getpostn)(struct XDR *xdrs);/* returns bytes off from beginning */
- bool_t (*x_setpostn)(struct XDR *xdrs, u_int pos);/* lets you reposition the stream */
- long * (*x_inline)(struct XDR *xdrs, u_int len);/* buf quick ptr to buffered data */
- void (*x_destroy)(struct XDR *xdrs); /* free privates of this xdr_stream */
- } *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 */
- 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.
- * bool_t (*xdrproc_t)(XDR *, caddr_t *);
- */
- typedef bool_t (* XDRFUN xdrproc_t)(XDR *, void *);
- /*
- * xdr_string_t is for type casts in cases where a xdr function is called
- * via a pointer. If the function happens to be xdr_string(), then it uses
- * the last argument, which is passed as UINT_MAX, othervice the u_int is
- * just ignored.
- */
- typedef bool_t (* XDRFUN xdr_string_t)(XDR *, void *, u_int);
-
- /*
- * Operations defined on a XDR handle
- *
- * XDR *xdrs;
- * long *longp;
- * caddr_t 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)
-
- #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) \
- 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)
-
- /*
- * 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;
- };
-
- /*
- * In-line routines for fast encode/decode of primitve 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_LONG(buf) ((long)ntohl((u_long)*(buf)++))
- #define IXDR_PUT_LONG(buf, v) (*(buf)++ = (long)htonl((u_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_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), ((long)(v)))
- #define IXDR_PUT_ENUM(buf, v) IXDR_PUT_LONG((buf), ((long)(v)))
- #define IXDR_PUT_U_LONG(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)))
-
- /*
- * Function to free memory allocated by an xdr object
- */
- void xdr_free(xdrproc_t proc, void * objp);
-
- /*
- * These are the "generic" xdr routines.
- */
- extern bool_t XDRFUN xdr_void(XDR * xdrs, void * dummy);
- extern bool_t XDRFUN xdr_int(XDR * xdrs, int * ip);
- extern bool_t XDRFUN xdr_u_int(XDR * xdrs, u_int * uip);
- extern bool_t XDRFUN xdr_long(XDR * xdrs, long * lp);
- extern bool_t XDRFUN xdr_u_long(XDR * xdrs, u_long * ulp);
- extern bool_t XDRFUN xdr_short(XDR * xdrs, short * sp);
- extern bool_t XDRFUN xdr_u_short(XDR * xdrs, u_short * usp);
- extern bool_t XDRFUN xdr_bool(XDR * xdrs, bool_t * bp);
- extern bool_t XDRFUN xdr_enum(XDR * xdrs, enum_t * ep);
- extern bool_t XDRFUN xdr_array(XDR * xdrs, caddr_t * addrp,
- u_int * sizep, u_int maxsize,
- u_int elsize, xdrproc_t elproc);
- extern bool_t XDRFUN xdr_bytes(XDR * xdrs, char ** cpp, u_int * sizep,
- u_int maxsize);
- extern bool_t XDRFUN xdr_opaque(XDR * xdrs, caddr_t cp, u_int cnt);
- extern bool_t XDRFUN xdr_string(XDR * xdrs, char ** cpp, u_int maxsize);
- extern bool_t XDRFUN xdr_union(XDR * xdrs, int * dscmp, char * unp,
- struct xdr_discrim * choices,
- xdrproc_t dfault);
- extern bool_t XDRFUN xdr_char(XDR * xdrs, char * cp);
- extern bool_t XDRFUN xdr_u_char(XDR * xdrs, u_char * ucp);
- extern bool_t XDRFUN xdr_vector(XDR * xdrs, char * basep, u_int nelem,
- u_int elemsize, xdrproc_t xdr_elem);
- extern bool_t XDRFUN xdr_float(XDR *xdrs, float *fp);
- extern bool_t XDRFUN xdr_double(XDR *xdrs, double *dp);
- extern bool_t XDRFUN xdr_reference(XDR * xdrs, caddr_t * pp, u_int size,
- xdrproc_t proc);
- extern bool_t XDRFUN xdr_pointer(XDR * xdrs, char ** objpp,
- u_int obj_size, xdrproc_t xdr_obj);
- extern bool_t XDRFUN xdr_wrapstring(XDR * xdrs, char ** cpp);
-
- /*
- * 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 XDRFUN xdr_netobj(XDR * xdrs, struct netobj * np);
-
- /*
- * These are the public routines for the various implementations of
- * xdr streams.
- */
- extern void xdrmem_create(XDR * xdrs, caddr_t addr, u_int size,
- enum xdr_op op); /* XDR using memory buffers */
- #ifdef USE_DOSIO
- extern void xdrstdio_create(XDR * xdrs, BPTR file,
- enum xdr_op op); /* XDR using stdio library */
- #else
- extern void xdrstdio_create(XDR * xdrs, FILE * file,
- enum xdr_op op); /* XDR using stdio library */
- #endif
- extern void xdrrec_create(XDR * xdrs, u_int sendsize, u_int recvsize,
- void * tcp_handle,
- int (* readit)(void *, caddr_t, int),
- int (* writeit)(void *, caddr_t, int)); /* XDR pseudo records for tcp */
- extern bool_t xdrrec_endofrecord(XDR * xdrs, int sendnow);/* make end of xdr record */
- extern bool_t xdrrec_skiprecord(XDR * xdrs);/* move to beginning of next record */
- extern bool_t xdrrec_eof(XDR * xdrs); /* true if no more input */
-
- #endif /* !RPC_XDR_H */
-