/*
* 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.
*/
/*
* 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 <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <rpc/rpc.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
#include <rpc/rpc_com.h>
typedef quad_t longlong_t; /* ANSI long long type */
typedef u_quad_t u_longlong_t; /* ANSI unsigned long long type */
/*
* constants specific to the xdr "protocol"
*/
#define XDR_FALSE ((long) 0)
#define XDR_TRUE ((long) 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(proc, objp)
xdrproc_t proc;
void *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(xdrs, ip)
XDR *xdrs;
int *ip;
{
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;
return (TRUE);
case XDR_FREE:
return (TRUE);
}
/* NOTREACHED */
return (FALSE);
}
/*
* XDR unsigned integers
*/
bool_t
xdr_u_int(xdrs, up)
XDR *xdrs;
u_int *up;
{
u_long l;
switch (xdrs->x_op) {
case XDR_ENCODE:
l = (u_long) *up;
return (XDR_PUTLONG(xdrs, (long *)&l));
case XDR_DECODE:
if (!XDR_GETLONG(xdrs, (long *)&l)) {
return (FALSE);
}
*up = (u_int) l;
return (TRUE);
case XDR_FREE:
return (TRUE);
}
/* NOTREACHED */
return (FALSE);
}
/*
* XDR long integers
* same as xdr_u_long - open coded to save a proc call!
*/
bool_t
xdr_long(xdrs, lp)
XDR *xdrs;
long *lp;
{
switch (xdrs->x_op) {
case XDR_ENCODE:
return (XDR_PUTLONG(xdrs, lp));
case XDR_DECODE:
return (XDR_GETLONG(xdrs, lp));
case XDR_FREE:
return (TRUE);
}
/* NOTREACHED */
return (FALSE);
}
/*
* XDR unsigned long integers
* same as xdr_long - open coded to save a proc call!
*/
bool_t
xdr_u_long(xdrs, ulp)
XDR *xdrs;
u_long *ulp;
{
switch (xdrs->x_op) {
case XDR_ENCODE:
return (XDR_PUTLONG(xdrs, (long *)ulp));
case XDR_DECODE:
return (XDR_GETLONG(xdrs, (long *)ulp));
case XDR_FREE:
return (TRUE);
}
/* NOTREACHED */
return (FALSE);
}
/*
* XDR 32-bit integers
* same as xdr_u_int32_t - open coded to save a proc call!
*/
bool_t
xdr_int32_t(xdrs, int32_p)
XDR *xdrs;
int32_t *int32_p;
{
long l;
switch (xdrs->x_op) {
case XDR_ENCODE:
l = (long) *int32_p;
return (XDR_PUTLONG(xdrs, &l));
case XDR_DECODE:
if (!XDR_GETLONG(xdrs, &l)) {
return (FALSE);
}
*int32_p = (int32_t) l;
return (TRUE);
case XDR_FREE:
return (TRUE);
}
/* NOTREACHED */
return (FALSE);
}
/*
* XDR unsigned 32-bit integers
* same as xdr_int32_t - open coded to save a proc call!
*/
bool_t
xdr_u_int32_t(xdrs, u_int32_p)
XDR *xdrs;
u_int32_t *u_int32_p;
{
u_long l;
switch (xdrs->x_op) {
case XDR_ENCODE:
l = (u_long) *u_int32_p;
return (XDR_PUTLONG(xdrs, (long *)&l));
case XDR_DECODE:
if (!XDR_GETLONG(xdrs, (long *)&l)) {
return (FALSE);
}
*u_int32_p = (u_int32_t) l;
return (TRUE);
case XDR_FREE:
return (TRUE);
}
/* NOTREACHED */
return (FALSE);
}
/*
* XDR unsigned 32-bit integers
*/
bool_t
xdr_uint32_t(xdrs, uint32_p)
XDR *xdrs;
uint32_t *uint32_p;
{
return (xdr_u_int32_t(xdrs, (u_int32_t *)uint32_p));
}
/*
* 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);
}
/* NOTREACHED */
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, (long *)&l));
case XDR_DECODE:
if (!XDR_GETLONG(xdrs, (long *)&l)) {
return (FALSE);
}
*usp = (u_short) l;
return (TRUE);
case XDR_FREE:
return (TRUE);
}
/* NOTREACHED */
return (FALSE);
}
/*
* XDR 16-bit integers
*/
bool_t
xdr_int16_t(xdrs, int16_p)
XDR *xdrs;
int16_t *int16_p;
{
long l;
switch (xdrs->x_op) {
case XDR_ENCODE:
l = (long) *int16_p;
return (XDR_PUTLONG(xdrs, &l));
case XDR_DECODE:
if (!XDR_GETLONG(xdrs, &l)) {
return (FALSE);
}
*int16_p = (int16_t) l;
return (TRUE);
case XDR_FREE:
return (TRUE);
}
/* NOTREACHED */
return (FALSE);
}
/*
* XDR unsigned 16-bit integers
*/
bool_t
xdr_u_int16_t(xdrs, u_int16_p)
XDR *xdrs;
u_int16_t *u_int16_p;
{
u_long l;
switch (xdrs->x_op) {
case XDR_ENCODE:
l = (u_long) *u_int16_p;
return (XDR_PUTLONG(xdrs, (long *)&l));
case XDR_DECODE:
if (!XDR_GETLONG(xdrs, (long *)&l)) {
return (FALSE);
}
*u_int16_p = (u_int16_t) l;
return (TRUE);
case XDR_FREE:
return (TRUE);
}
/* NOTREACHED */
return (FALSE);
}
/*
* XDR unsigned 16-bit integers
*/
bool_t
xdr_uint16_t(xdrs, uint16_p)
XDR *xdrs;
uint16_t *uint16_p;
{
return (xdr_u_int16_t(xdrs, (u_int16_t *)uint16_p));
}
/*
* XDR 8-bit integers
*/
bool_t
xdr_int8_t(xdrs, int8_p)
XDR *xdrs;
int8_t *int8_p;
{
long l;
switch (xdrs->x_op) {
case XDR_ENCODE:
l = (long) *int8_p;
return (XDR_PUTLONG(xdrs, &l));
case XDR_DECODE:
if (!XDR_GETLONG(xdrs, &l)) {
return (FALSE);
}
*int8_p = (int8_t) l;
return (TRUE);
case XDR_FREE:
return (TRUE);
}
/* NOTREACHED */
return (FALSE);
}
/*
* XDR unsigned 8-bit integers
*/
bool_t
xdr_u_int8_t(xdrs, uint8_p)
XDR *xdrs;
uint8_t *uint8_p;
{
u_long l;
switch (xdrs->x_op) {
case XDR_ENCODE:
l = (u_long) *uint8_p;
return (XDR_PUTLONG(xdrs, (long *)&l));
case XDR_DECODE:
if (!XDR_GETLONG(xdrs, (long *)&l)) {
return (FALSE);
}
*uint8_p = (uint8_t) l;
return (TRUE);
case XDR_FREE:
return (TRUE);
}
/* NOTREACHED */
return (FALSE);
}
/*
* XDR unsigned 8-bit integers
*/
bool_t
xdr_uint8_t(xdrs, uint8_p)
XDR *xdrs;
uint8_t *uint8_p;
{
return (xdr_u_int8_t(xdrs, (uint8_t *)uint8_p));
}
/*
* 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);
}
/* NOTREACHED */
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
*/
/* LINTED */ if (sizeof (enum sizecheck) == sizeof (long)) {
return (xdr_long(xdrs, (long *)(void *)ep));
} else /* LINTED */ if (sizeof (enum sizecheck) == sizeof (int)) {
return (xdr_int(xdrs, (int *)(void *)ep));
} else /* LINTED */ if (sizeof (enum sizecheck) == sizeof (short)) {
return (xdr_short(xdrs, (short *)(void *)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 int 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;
if (xdrs->x_op == XDR_DECODE) {
if (!XDR_GETBYTES(xdrs, cp, cnt)) {
return (FALSE);
}
if (rndup == 0)
return (TRUE);
return (XDR_GETBYTES(xdrs, (caddr_t)(void *)crud, rndup));
}
if (xdrs->x_op == XDR_ENCODE) {
if (!XDR_PUTBYTES(xdrs, cp, cnt)) {
return (FALSE);
}
if (rndup == 0)
return (TRUE);
return (XDR_PUTBYTES(xdrs, xdr_zero, rndup));
}
if (xdrs->x_op == 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;
bool_t ret, allocated = FALSE;
/*
* 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 = mem_alloc(nodesize);
allocated = TRUE;
}
if (sp == NULL) {
warnx("xdr_bytes: out of memory");
return (FALSE);
}
/* FALLTHROUGH */
case XDR_ENCODE:
ret = xdr_opaque(xdrs, sp, nodesize);
if ((xdrs->x_op == XDR_DECODE) && (ret == FALSE)) {
if (allocated == TRUE) {
free(sp);
*cpp = NULL;
}
}
return (ret);
case XDR_FREE:
if (sp != NULL) {
mem_free(sp, nodesize);
*cpp = NULL;
}
return (TRUE);
}
/* NOTREACHED */
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 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
* 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));
}
/*
* no match - execute the default xdr routine if there is one
*/
return ((dfault == NULL_xdrproc_t) ? FALSE :
(*dfault)(xdrs, unp));
}
/*
* 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;
bool_t ret, allocated = FALSE;
/*
* 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 */
}
/* FALLTHROUGH */
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;
if (nodesize == 0) {
/* This means an overflow. It a bug in the caller which
* provided a too large maxsize but nevertheless catch it
* here.
*/
return FALSE;
}
/*
* now deal with the actual bytes
*/
switch (xdrs->x_op) {
case XDR_DECODE:
if (sp == NULL) {
*cpp = sp = mem_alloc(nodesize);
allocated = TRUE;
}
if (sp == NULL) {
warnx("xdr_string: out of memory");
return (FALSE);
}
sp[size] = 0;
/* FALLTHROUGH */
case XDR_ENCODE:
ret = xdr_opaque(xdrs, sp, size);
if ((xdrs->x_op == XDR_DECODE) && (ret == FALSE)) {
if (allocated == TRUE) {
free(sp);
*cpp = NULL;
}
}
return (ret);
case XDR_FREE:
mem_free(sp, nodesize);
*cpp = NULL;
return (TRUE);
}
/* NOTREACHED */
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;
{
return xdr_string(xdrs, cpp, RPC_MAXDATASIZE);
}
/*
* NOTE: xdr_hyper(), xdr_u_hyper(), xdr_longlong_t(), and xdr_u_longlong_t()
* are in the "non-portable" section because they require that a `long long'
* be a 64-bit type.
*
* --thorpej@netbsd.org, November 30, 1999
*/
/*
* XDR 64-bit integers
*/
bool_t
xdr_int64_t(xdrs, llp)
XDR *xdrs;
int64_t *llp;
{
u_long ul[2];
switch (xdrs->x_op) {
case XDR_ENCODE:
ul[0] = (u_long)((u_int64_t)*llp >> 32) & 0xffffffff;
ul[1] = (u_long)((u_int64_t)*llp) & 0xffffffff;
if (XDR_PUTLONG(xdrs, (long *)&ul[0]) == FALSE)
return (FALSE);
return (XDR_PUTLONG(xdrs, (long *)&ul[1]));
case XDR_DECODE:
if (XDR_GETLONG(xdrs, (long *)&ul[0]) == FALSE)
return (FALSE);
if (XDR_GETLONG(xdrs, (long *)&ul[1]) == FALSE)
return (FALSE);
*llp = (int64_t)
(((u_int64_t)ul[0] << 32) | ((u_int64_t)ul[1]));
return (TRUE);
case XDR_FREE:
return (TRUE);
}
/* NOTREACHED */
return (FALSE);
}
/*
* XDR unsigned 64-bit integers
*/
bool_t
xdr_u_int64_t(xdrs, ullp)
XDR *xdrs;
u_int64_t *ullp;
{
u_long ul[2];
switch (xdrs->x_op) {
case XDR_ENCODE:
ul[0] = (u_long)(*ullp >> 32) & 0xffffffff;
ul[1] = (u_long)(*ullp) & 0xffffffff;
if (XDR_PUTLONG(xdrs, (long *)&ul[0]) == FALSE)
return (FALSE);
return (XDR_PUTLONG(xdrs, (long *)&ul[1]));
case XDR_DECODE:
if (XDR_GETLONG(xdrs, (long *)&ul[0]) == FALSE)
return (FALSE);
if (XDR_GETLONG(xdrs, (long *)&ul[1]) == FALSE)
return (FALSE);
*ullp = (u_int64_t)
(((u_int64_t)ul[0] << 32) | ((u_int64_t)ul[1]));
return (TRUE);
case XDR_FREE:
return (TRUE);
}
/* NOTREACHED */
return (FALSE);
}
/*
* XDR unsigned 64-bit integers
*/
bool_t
xdr_uint64_t(xdrs, ullp)
XDR *xdrs;
uint64_t *ullp;
{
return (xdr_u_int64_t(xdrs, (u_int64_t *)ullp));
}
/*
* XDR hypers
*/
bool_t
xdr_hyper(xdrs, llp)
XDR *xdrs;
longlong_t *llp;
{
/*
* Don't bother open-coding this; it's a fair amount of code. Just
* call xdr_int64_t().
*/
return (xdr_int64_t(xdrs, (int64_t *)llp));
}
/*
* XDR unsigned hypers
*/
bool_t
xdr_u_hyper(xdrs, ullp)
XDR *xdrs;
u_longlong_t *ullp;
{
/*
* Don't bother open-coding this; it's a fair amount of code. Just
* call xdr_u_int64_t().
*/
return (xdr_u_int64_t(xdrs, (u_int64_t *)ullp));
}
/*
* XDR longlong_t's
*/
bool_t
xdr_longlong_t(xdrs, llp)
XDR *xdrs;
longlong_t *llp;
{
/*
* Don't bother open-coding this; it's a fair amount of code. Just
* call xdr_int64_t().
*/
return (xdr_int64_t(xdrs, (int64_t *)llp));
}
/*
* XDR u_longlong_t's
*/
bool_t
xdr_u_longlong_t(xdrs, ullp)
XDR *xdrs;
u_longlong_t *ullp;
{
/*
* Don't bother open-coding this; it's a fair amount of code. Just
* call xdr_u_int64_t().
*/
return (xdr_u_int64_t(xdrs, (u_int64_t *)ullp));
}
/*
* XDR quad_t
*/
bool_t
xdr_quad_t(xdrs, llp)
XDR *xdrs;
int64_t *llp;
{
return (xdr_int64_t(xdrs, (int64_t *)llp));
}
/*
* XDR u_quad_t
*/
bool_t
xdr_u_quad_t(xdrs, ullp)
XDR *xdrs;
u_int64_t *ullp;
{
return (xdr_u_int64_t(xdrs, (u_int64_t *)ullp));
}