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xdr.h
/* @(#)xdr.h 2.2 88/07/29 4.0 RPCSRC */ /* * Copyright (c) 2010, Oracle America, 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 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. */ /* @(#)xdr.h 1.19 87/04/22 SMI */ /* * xdr.h, External Data Representation Serialization Routines. */ #ifndef GSSRPC_XDR_H #define GSSRPC_XDR_H #include <stdio.h> /* for FILE */ GSSRPC__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) #define RNDUP(x) ((((x) + BYTES_PER_XDR_UNIT - 1) / BYTES_PER_XDR_UNIT) \ * BYTES_PER_XDR_UNIT) /* * 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 *); * * XXX can't actually prototype it, because some take three args!!! */ typedef bool_t (*xdrproc_t)(); /* * 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 { /* get a long from underlying stream */ bool_t (*x_getlong)(struct XDR *, long *); /* put a long to underlying stream */ bool_t (*x_putlong)(struct XDR *, long *); /* get some bytes from underlying stream */ bool_t (*x_getbytes)(struct XDR *, caddr_t, u_int); /* put some bytes to underlying stream */ bool_t (*x_putbytes)(struct XDR *, caddr_t, u_int); /* returns bytes off from beginning */ u_int (*x_getpostn)(struct XDR *); /* lets you reposition the stream */ bool_t (*x_setpostn)(struct XDR *, u_int); /* buf quick ptr to buffered data */ rpc_inline_t *(*x_inline)(struct XDR *, int); /* free privates of this xdr_stream */ void (*x_destroy)(struct XDR *); } *x_ops; caddr_t x_public; /* users' data */ void * x_private; /* pointer to private data */ caddr_t x_base; /* private used for position info */ int x_handy; /* extra private word */ } XDR; /* * Operations defined on a XDR handle * * XDR *xdrs; * int32_t *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_INT32(buf) ((int32_t)IXDR_GET_U_INT32(buf)) #define IXDR_PUT_INT32(buf, v) IXDR_PUT_U_INT32((buf),((uint32_t)(v))) #define IXDR_GET_U_INT32(buf) (ntohl((uint32_t)*(buf)++)) #define IXDR_PUT_U_INT32(buf, v) (*(buf)++ = (int32_t)htonl((v))) #define IXDR_GET_LONG(buf) ((long)IXDR_GET_INT32(buf)) #define IXDR_PUT_LONG(buf, v) IXDR_PUT_U_INT32((buf),((uint32_t)(v))) #define IXDR_GET_BOOL(buf) ((bool_t)IXDR_GET_LONG(buf)) #define IXDR_GET_ENUM(buf, t) ((t)IXDR_GET_INT32(buf)) #define IXDR_GET_U_LONG(buf) ((u_long)IXDR_GET_U_INT32(buf)) #define IXDR_GET_SHORT(buf) ((short)IXDR_GET_INT32(buf)) #define IXDR_GET_U_SHORT(buf) ((u_short)IXDR_GET_U_INT32(buf)) #define IXDR_PUT_BOOL(buf, v) IXDR_PUT_INT32((buf),((int32_t)(v))) #define IXDR_PUT_ENUM(buf, v) IXDR_PUT_INT32((buf),((int32_t)(v))) #define IXDR_PUT_U_LONG(buf, v) IXDR_PUT_U_INT32((buf),((uint32_t)(v))) #define IXDR_PUT_SHORT(buf, v) IXDR_PUT_INT32((buf),((int32_t)(v))) #define IXDR_PUT_U_SHORT(buf, v) IXDR_PUT_U_INT32((buf),((uint32_t)(v))) /* * These are the "generic" xdr routines. */ extern bool_t xdr_void(XDR *, void *); extern bool_t xdr_int(XDR *, int *); extern bool_t xdr_u_int(XDR *, u_int *); extern bool_t xdr_long(XDR *, long *); extern bool_t xdr_u_long(XDR *, u_long *); extern bool_t xdr_short(XDR *, short *); extern bool_t xdr_u_short(XDR *, u_short *); extern bool_t xdr_bool(XDR *, bool_t *); extern bool_t xdr_enum(XDR *, enum_t *); extern bool_t xdr_array(XDR *, caddr_t *, u_int *, u_int, u_int, xdrproc_t); extern bool_t xdr_bytes(XDR *, char **, u_int *, u_int); extern bool_t xdr_opaque(XDR *, caddr_t, u_int); extern bool_t xdr_string(XDR *, char **, u_int); extern bool_t xdr_union(XDR *, enum_t *, char *, struct xdr_discrim *, xdrproc_t); extern bool_t xdr_char(XDR *, char *); extern bool_t xdr_u_char(XDR *, u_char *); extern bool_t xdr_vector(XDR *, char *, u_int, u_int, xdrproc_t); extern bool_t xdr_float(XDR *, float *); extern bool_t xdr_double(XDR *, double *); extern bool_t xdr_reference(XDR *, caddr_t *, u_int, xdrproc_t); extern bool_t xdr_pointer(XDR *, char **, u_int, xdrproc_t); extern bool_t xdr_wrapstring(XDR *, char **); extern unsigned long xdr_sizeof(xdrproc_t, void *); #define xdr_rpcprog xdr_u_int32 #define xdr_rpcvers xdr_u_int32 #define xdr_rpcprot xdr_u_int32 #define xdr_rpcproc xdr_u_int32 #define xdr_rpcport xdr_u_int32 /* * Common opaque bytes objects used by many rpc protocols; * declared here due to commonality. */ #define MAX_NETOBJ_SZ 2048 struct netobj { u_int n_len; char *n_bytes; }; typedef struct netobj netobj; extern bool_t xdr_netobj(XDR *, struct netobj *); extern bool_t xdr_int32(XDR *, int32_t *); extern bool_t xdr_u_int32(XDR *, uint32_t *); /* * These are the public routines for the various implementations of * xdr streams. */ /* XDR allocating memory buffer */ extern void xdralloc_create(XDR *, enum xdr_op); /* destroy xdralloc, save buf */ extern void xdralloc_release(XDR *); /* get buffer from xdralloc */ extern caddr_t xdralloc_getdata(XDR *); /* XDR using memory buffers */ extern void xdrmem_create(XDR *, caddr_t, 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 *xdrs, u_int, u_int, caddr_t, int (*) (caddr_t, caddr_t, int), int (*) (caddr_t, caddr_t, int)); /* make end of xdr record */ extern bool_t xdrrec_endofrecord(XDR *, bool_t); /* move to beginning of next record */ extern bool_t xdrrec_skiprecord (XDR *xdrs); /* true if no more input */ extern bool_t xdrrec_eof (XDR *xdrs); /* free memory buffers for xdr */ extern void xdr_free (xdrproc_t, void *); GSSRPC__END_DECLS #endif /* !defined(GSSRPC_XDR_H) */
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