glibc/sunrpc/xdr.c
Ulrich Drepper 5713a71e1a Update.
1998-11-29  Thorsten Kukuk  <kukuk@vt.uni-paderborn.de>

	* sunrpc/Makefile: Add xdr_intXX_t to routines.
	* sunrpc/Versions: Add xdr_int8_t, xdr_uint8_t, xdr_in16_t and
	  xdr_uint16_t.
	* sunrpc/rpc/xdr.h: Add prototypes for new xdr_intXX_t functions.
	* sunrpc/xdr.c: Remove xdr_int32_t and xdr_uint32_t.
	* sunrpc/xdr_intXX_t.c: New, contains all xdr_intXX_t functions.

	* nis/Depend: New.
	* nis/nss_nis/nis-service.c: Include generated prototype for parser.
1998-11-30 16:42:19 +00:00

651 lines
12 KiB
C

/* @(#)xdr.c 2.1 88/07/29 4.0 RPCSRC */
/*
* 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
* OR ANY PART THEREOF.
*
* 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.
*
* Sun Microsystems, Inc.
* 2550 Garcia Avenue
* Mountain View, California 94043
*/
#if !defined(lint) && defined(SCCSIDS)
static char sccsid[] = "@(#)xdr.c 1.35 87/08/12";
#endif
/*
* 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
* xdr.
*/
#include <stdio.h>
#include <limits.h>
#include <string.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
/*
* constants specific to the xdr "protocol"
*/
#define XDR_FALSE ((long) 0)
#define XDR_TRUE ((long) 1)
#define LASTUNSIGNED ((u_int) 0-1)
/*
* for unit alignment
*/
static const 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
*/
void
xdr_free (xdrproc_t proc, char *objp)
{
XDR x;
x.x_op = XDR_FREE;
(*proc) (&x, objp);
}
/*
* XDR nothing
*/
bool_t
xdr_void (void)
{
return TRUE;
}
/*
* XDR integers
*/
bool_t
xdr_int (XDR *xdrs, int *ip)
{
#if INT_MAX < LONG_MAX
long l;
switch (xdrs->x_op)
{
case XDR_ENCODE:
l = (long) *ip;
return XDR_PUTLONG (xdrs, &l);
case XDR_DECODE:
if (!XDR_GETLONG (xdrs, &l))
{
return FALSE;
}
*ip = (int) l;
case XDR_FREE:
return TRUE;
}
return FALSE;
#elif INT_MAX == LONG_MAX
return xdr_long (xdrs, (long *) ip);
#elif INT_MAX == SHRT_MAX
return xdr_short (xdrs, (short *) ip);
#else
#error unexpected integer sizes in_xdr_int()
#endif
}
/*
* XDR unsigned integers
*/
bool_t
xdr_u_int (XDR *xdrs, u_int *up)
{
#if UINT_MAX < ULONG_MAX
u_long l;
switch (xdrs->x_op)
{
case XDR_ENCODE:
l = (u_long) * up;
return XDR_PUTLONG (xdrs, &l);
case XDR_DECODE:
if (!XDR_GETLONG (xdrs, &l))
{
return FALSE;
}
*up = (u_int) l;
case XDR_FREE:
return TRUE;
}
return FALSE;
#elif UINT_MAX == ULONG_MAX
return xdr_u_long (xdrs, (u_long *) up);
#elif UINT_MAX == USHRT_MAX
return xdr_short (xdrs, (short *) up);
#else
#error unexpected integer sizes in_xdr_u_int()
#endif
}
/*
* XDR long integers
* same as xdr_u_long - open coded to save a proc call!
*/
bool_t
xdr_long (XDR *xdrs, long *lp)
{
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)
return TRUE;
return FALSE;
}
/*
* XDR unsigned long integers
* same as xdr_long - open coded to save a proc call!
*/
bool_t
xdr_u_long (XDR *xdrs, u_long *ulp)
{
switch (xdrs->x_op)
{
case XDR_DECODE:
return XDR_GETLONG (xdrs, (long *) ulp);
case XDR_ENCODE:
return XDR_PUTLONG (xdrs, (long *) ulp);
case XDR_FREE:
return TRUE;
}
return FALSE;
}
/*
* XDR short integers
*/
bool_t
xdr_short (xdrs, sp)
XDR *xdrs;
short *sp;
{
long l;
switch (xdrs->x_op)
{
case XDR_ENCODE:
l = (long) *sp;
return XDR_PUTLONG (xdrs, &l);
case XDR_DECODE:
if (!XDR_GETLONG (xdrs, &l))
{
return FALSE;
}
*sp = (short) l;
return TRUE;
case XDR_FREE:
return TRUE;
}
return FALSE;
}
/*
* XDR unsigned short integers
*/
bool_t
xdr_u_short (xdrs, usp)
XDR *xdrs;
u_short *usp;
{
u_long l;
switch (xdrs->x_op)
{
case XDR_ENCODE:
l = (u_long) * usp;
return XDR_PUTLONG (xdrs, &l);
case XDR_DECODE:
if (!XDR_GETLONG (xdrs, &l))
{
return FALSE;
}
*usp = (u_short) l;
return TRUE;
case XDR_FREE:
return TRUE;
}
return FALSE;
}
/*
* XDR a char
*/
bool_t
xdr_char (xdrs, cp)
XDR *xdrs;
char *cp;
{
int i;
i = (*cp);
if (!xdr_int (xdrs, &i))
{
return FALSE;
}
*cp = i;
return TRUE;
}
/*
* XDR an unsigned char
*/
bool_t
xdr_u_char (xdrs, cp)
XDR *xdrs;
u_char *cp;
{
u_int u;
u = (*cp);
if (!xdr_u_int (xdrs, &u))
{
return FALSE;
}
*cp = u;
return TRUE;
}
/*
* XDR booleans
*/
bool_t
xdr_bool (xdrs, bp)
XDR *xdrs;
bool_t *bp;
{
long lb;
switch (xdrs->x_op)
{
case XDR_ENCODE:
lb = *bp ? XDR_TRUE : XDR_FALSE;
return XDR_PUTLONG (xdrs, &lb);
case XDR_DECODE:
if (!XDR_GETLONG (xdrs, &lb))
{
return FALSE;
}
*bp = (lb == XDR_FALSE) ? FALSE : TRUE;
return TRUE;
case XDR_FREE:
return TRUE;
}
return FALSE;
}
/*
* XDR enumerations
*/
bool_t
xdr_enum (xdrs, ep)
XDR *xdrs;
enum_t *ep;
{
enum sizecheck
{
SIZEVAL
}; /* used to find the size of an enum */
/*
* enums are treated as ints
*/
if (sizeof (enum sizecheck) == 4)
{
#if INT_MAX < LONG_MAX
long l;
switch (xdrs->x_op)
{
case XDR_ENCODE:
l = *ep;
return XDR_PUTLONG (xdrs, &l);
case XDR_DECODE:
if (!XDR_GETLONG (xdrs, &l))
{
return FALSE;
}
*ep = l;
case XDR_FREE:
return TRUE;
}
return FALSE;
#else
return xdr_long (xdrs, (long *) ep);
#endif
}
else if (sizeof (enum sizecheck) == sizeof (short))
{
return xdr_short (xdrs, (short *) ep);
}
else
{
return FALSE;
}
}
/*
* XDR opaque data
* Allows the specification of a fixed size sequence of opaque bytes.
* cp points to the opaque object and cnt gives the byte length.
*/
bool_t
xdr_opaque (xdrs, cp, cnt)
XDR *xdrs;
caddr_t cp;
u_int cnt;
{
u_int rndup;
static char crud[BYTES_PER_XDR_UNIT];
/*
* if no data we are done
*/
if (cnt == 0)
return TRUE;
/*
* round byte count to full xdr units
*/
rndup = cnt % BYTES_PER_XDR_UNIT;
if (rndup > 0)
rndup = BYTES_PER_XDR_UNIT - rndup;
switch (xdrs->x_op)
{
case XDR_DECODE:
if (!XDR_GETBYTES (xdrs, cp, cnt))
{
return FALSE;
}
if (rndup == 0)
return TRUE;
return XDR_GETBYTES (xdrs, (caddr_t)crud, rndup);
case XDR_ENCODE:
if (!XDR_PUTBYTES (xdrs, cp, cnt))
{
return FALSE;
}
if (rndup == 0)
return TRUE;
return XDR_PUTBYTES (xdrs, xdr_zero, rndup);
case XDR_FREE:
return TRUE;
}
return FALSE;
}
/*
* XDR counted bytes
* *cpp is a pointer to the bytes, *sizep is the count.
* If *cpp is NULL maxsize bytes are allocated
*/
bool_t
xdr_bytes (xdrs, cpp, sizep, maxsize)
XDR *xdrs;
char **cpp;
u_int *sizep;
u_int maxsize;
{
char *sp = *cpp; /* sp is the actual string pointer */
u_int nodesize;
/*
* first deal with the length since xdr bytes are counted
*/
if (!xdr_u_int (xdrs, sizep))
{
return FALSE;
}
nodesize = *sizep;
if ((nodesize > maxsize) && (xdrs->x_op != XDR_FREE))
{
return FALSE;
}
/*
* now deal with the actual bytes
*/
switch (xdrs->x_op)
{
case XDR_DECODE:
if (nodesize == 0)
{
return TRUE;
}
if (sp == NULL)
{
*cpp = sp = (char *) mem_alloc (nodesize);
}
if (sp == NULL)
{
(void) fprintf (stderr, "xdr_bytes: out of memory\n");
return FALSE;
}
/* fall into ... */
case XDR_ENCODE:
return xdr_opaque (xdrs, sp, nodesize);
case XDR_FREE:
if (sp != NULL)
{
mem_free (sp, nodesize);
*cpp = NULL;
}
return TRUE;
}
return FALSE;
}
/*
* Implemented here due to commonality of the object.
*/
bool_t
xdr_netobj (xdrs, np)
XDR *xdrs;
struct netobj *np;
{
return xdr_bytes (xdrs, &np->n_bytes, &np->n_len, MAX_NETOBJ_SZ);
}
/*
* XDR a discriminated 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
* routine may be called.
* If there is no specific or default routine an error is returned.
*/
bool_t
xdr_union (xdrs, dscmp, unp, choices, dfault)
XDR *xdrs;
enum_t *dscmp; /* enum to decide which arm to work on */
char *unp; /* the union itself */
const struct xdr_discrim *choices; /* [value, xdr proc] for each arm */
xdrproc_t dfault; /* default xdr routine */
{
enum_t dscm;
/*
* we deal with the discriminator; it's an enum
*/
if (!xdr_enum (xdrs, dscmp))
{
return FALSE;
}
dscm = *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.
*/
bool_t
xdr_string (xdrs, cpp, maxsize)
XDR *xdrs;
char **cpp;
u_int maxsize;
{
char *sp = *cpp; /* sp is the actual string pointer */
u_int size;
u_int nodesize;
/*
* first deal with the length since xdr strings are counted-strings
*/
switch (xdrs->x_op)
{
case XDR_FREE:
if (sp == NULL)
{
return TRUE; /* already free */
}
/* fall through... */
case XDR_ENCODE:
if (sp == NULL)
return FALSE;
size = strlen (sp);
break;
case XDR_DECODE:
break;
}
if (!xdr_u_int (xdrs, &size))
{
return FALSE;
}
if (size > maxsize)
{
return FALSE;
}
nodesize = size + 1;
/*
* now deal with the actual bytes
*/
switch (xdrs->x_op)
{
case XDR_DECODE:
if (nodesize == 0)
{
return TRUE;
}
if (sp == NULL)
*cpp = sp = (char *) mem_alloc (nodesize);
if (sp == NULL)
{
(void) fprintf (stderr, "xdr_string: out of memory\n");
return FALSE;
}
sp[size] = 0;
/* fall into ... */
case XDR_ENCODE:
return xdr_opaque (xdrs, sp, size);
case XDR_FREE:
mem_free (sp, nodesize);
*cpp = NULL;
return TRUE;
}
return FALSE;
}
/*
* Wrapper for xdr_string that can be called directly from
* routines like clnt_call
*/
bool_t
xdr_wrapstring (xdrs, cpp)
XDR *xdrs;
char **cpp;
{
if (xdr_string (xdrs, cpp, LASTUNSIGNED))
{
return TRUE;
}
return FALSE;
}