* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
* unrestricted use provided that this legend is included on all tape
* media and as a part of the software program in whole or part. Users
* may copy or modify Sun RPC without charge, but are not authorized
* to license or distribute it to anyone else except as part of a product or
* program developed by the user.
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
* Sun RPC is provided with no support and without any obligation on the
* part of Sun Microsystems, Inc. to assist in its use, correction,
* modification or enhancement.
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
* or profits or other special, indirect and consequential damages, even if
* Sun has been advised of the possibility of such damages.
* Mountain View, California 94043
#if defined(LIBC_SCCS) && !defined(lint)
/*static char *sccsid = "from: @(#)xdr.c 1.35 87/08/12";*/
/*static char *sccsid = "from: @(#)xdr.c 2.1 88/07/29 4.0 RPCSRC";*/
static char *rcsid
= "$Id: xdr.c,v 1.3 1993/08/26 00:53:46 jtc Exp $";
* xdr.c, Generic XDR routines implementation.
* Copyright (C) 1986, Sun Microsystems, Inc.
* These are the "generic" xdr routines used to serialize and de-serialize
* most common data items. See xdr.h for more info on the interface to
* constants specific to the xdr "protocol"
#define XDR_FALSE ((long) 0)
#define XDR_TRUE ((long) 1)
#define LASTUNSIGNED ((u_int) 0-1)
static char xdr_zero
[BYTES_PER_XDR_UNIT
] = { 0, 0, 0, 0 };
* Free a data structure using XDR
* Not a filter, but a convenient utility nonetheless
xdr_void(/* xdrs, addr */)
(void) (xdr_short(xdrs
, (short *)ip
));
return (xdr_long(xdrs
, (long *)ip
));
if (sizeof (int) == sizeof (long)) {
return (xdr_long(xdrs
, (long *)ip
));
return (xdr_short(xdrs
, (short *)ip
));
(void) (xdr_short(xdrs
, (short *)up
));
return (xdr_u_long(xdrs
, (u_long
*)up
));
if (sizeof (u_int
) == sizeof (u_long
)) {
return (xdr_u_long(xdrs
, (u_long
*)up
));
return (xdr_short(xdrs
, (short *)up
));
* same as xdr_u_long - open coded to save a proc call!
if (xdrs
->x_op
== XDR_ENCODE
)
return (XDR_PUTLONG(xdrs
, lp
));
if (xdrs
->x_op
== XDR_DECODE
)
return (XDR_GETLONG(xdrs
, lp
));
if (xdrs
->x_op
== XDR_FREE
)
* XDR unsigned long integers
* same as xdr_long - open coded to save a proc call!
if (xdrs
->x_op
== XDR_DECODE
)
return (XDR_GETLONG(xdrs
, (long *)ulp
));
if (xdrs
->x_op
== XDR_ENCODE
)
return (XDR_PUTLONG(xdrs
, (long *)ulp
));
if (xdrs
->x_op
== XDR_FREE
)
return (XDR_PUTLONG(xdrs
, &l
));
if (!XDR_GETLONG(xdrs
, &l
)) {
* XDR unsigned short integers
return (XDR_PUTLONG(xdrs
, &l
));
if (!XDR_GETLONG(xdrs
, &l
)) {
if (!xdr_int(xdrs
, &i
)) {
if (!xdr_u_int(xdrs
, &u
)) {
lb
= *bp
? XDR_TRUE
: XDR_FALSE
;
return (XDR_PUTLONG(xdrs
, &lb
));
if (!XDR_GETLONG(xdrs
, &lb
)) {
*bp
= (lb
== XDR_FALSE
) ? FALSE
: TRUE
;
enum sizecheck
{ SIZEVAL
}; /* used to find the size of an enum */
* enums are treated as ints
if (sizeof (enum sizecheck
) == sizeof (long)) {
return (xdr_long(xdrs
, (long *)ep
));
} else if (sizeof (enum sizecheck
) == sizeof (short)) {
return (xdr_short(xdrs
, (short *)ep
));
(void) (xdr_short(xdrs
, (short *)ep
));
return (xdr_long(xdrs
, (long *)ep
));
* Allows the specification of a fixed size sequence of opaque bytes.
* cp points to the opaque object and cnt gives the byte length.
xdr_opaque(xdrs
, cp
, cnt
)
static crud
[BYTES_PER_XDR_UNIT
];
* round byte count to full xdr units
rndup
= cnt
% BYTES_PER_XDR_UNIT
;
rndup
= BYTES_PER_XDR_UNIT
- rndup
;
if (xdrs
->x_op
== XDR_DECODE
) {
if (!XDR_GETBYTES(xdrs
, cp
, cnt
)) {
return (XDR_GETBYTES(xdrs
, crud
, rndup
));
if (xdrs
->x_op
== XDR_ENCODE
) {
if (!XDR_PUTBYTES(xdrs
, cp
, cnt
)) {
return (XDR_PUTBYTES(xdrs
, xdr_zero
, rndup
));
if (xdrs
->x_op
== XDR_FREE
) {
* *cpp is a pointer to the bytes, *sizep is the count.
* If *cpp is NULL maxsize bytes are allocated
xdr_bytes(xdrs
, cpp
, sizep
, maxsize
)
register char *sp
= *cpp
; /* sp is the actual string pointer */
* first deal with the length since xdr bytes are counted
if (! xdr_u_int(xdrs
, sizep
)) {
if ((nodesize
> maxsize
) && (xdrs
->x_op
!= XDR_FREE
)) {
* now deal with the actual bytes
*cpp
= sp
= (char *)mem_alloc(nodesize
);
(void) fprintf(stderr
, "xdr_bytes: out of memory\n");
return (xdr_opaque(xdrs
, sp
, nodesize
));
* Implemented here due to commonality of the object.
return (xdr_bytes(xdrs
, &np
->n_bytes
, &np
->n_len
, MAX_NETOBJ_SZ
));
* XDR a descriminated union
* Support routine for discriminated unions.
* You create an array of xdrdiscrim structures, terminated with
* an entry with a null procedure pointer. The routine gets
* the discriminant value and then searches the array of xdrdiscrims
* looking for that value. It calls the procedure given in the xdrdiscrim
* to handle the discriminant. If there is no specific routine a default
* If there is no specific or default routine an error is returned.
xdr_union(xdrs
, dscmp
, unp
, choices
, dfault
)
enum_t
*dscmp
; /* enum to decide which arm to work on */
char *unp
; /* the union itself */
struct xdr_discrim
*choices
; /* [value, xdr proc] for each arm */
xdrproc_t dfault
; /* default xdr routine */
* we deal with the discriminator; it's an enum
if (! xdr_enum(xdrs
, dscmp
)) {
* search choices for a value that matches the discriminator.
* if we find one, execute the xdr routine for that value.
for (; choices
->proc
!= NULL_xdrproc_t
; choices
++) {
if (choices
->value
== dscm
)
return ((*(choices
->proc
))(xdrs
, unp
, LASTUNSIGNED
));
* no match - execute the default xdr routine if there is one
return ((dfault
== NULL_xdrproc_t
) ? FALSE
:
(*dfault
)(xdrs
, unp
, LASTUNSIGNED
));
* Non-portable xdr primitives.
* Care should be taken when moving these routines to new architectures.
* XDR null terminated ASCII strings
* xdr_string deals with "C strings" - arrays of bytes that are
* terminated by a NULL character. The parameter cpp references a
* pointer to storage; If the pointer is null, then the necessary
* storage is allocated. The last parameter is the max allowed length
* of the string as specified by a protocol.
xdr_string(xdrs
, cpp
, maxsize
)
register char *sp
= *cpp
; /* sp is the actual string pointer */
* first deal with the length since xdr strings are counted-strings
return(TRUE
); /* already free */
if (! xdr_u_int(xdrs
, &size
)) {
* now deal with the actual bytes
*cpp
= sp
= (char *)mem_alloc(nodesize
);
(void) fprintf(stderr
, "xdr_string: out of memory\n");
return (xdr_opaque(xdrs
, sp
, size
));
* Wrapper for xdr_string that can be called directly from
* routines like clnt_call
xdr_wrapstring(xdrs
, cpp
)
if (xdr_string(xdrs
, cpp
, LASTUNSIGNED
)) {