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freebsd/sys/netatm/spans/spans_kxdr.c
Peter Wemm c3aac50f28 $Id$ -> $FreeBSD$
1999-08-28 01:08:13 +00:00

685 lines
13 KiB
C
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/*
*
* ===================================
* HARP | Host ATM Research Platform
* ===================================
*
*
* This Host ATM Research Platform ("HARP") file (the "Software") is
* made available by Network Computing Services, Inc. ("NetworkCS")
* "AS IS". NetworkCS does not provide maintenance, improvements or
* support of any kind.
*
* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
* In no event shall NetworkCS be responsible for any damages, including
* but not limited to consequential damages, arising from or relating to
* any use of the Software or related support.
*
* Copyright 1994-1998 Network Computing Services, Inc.
*
* Copies of this Software may be made, however, the above copyright
* notice must be reproduced on all copies.
*
* @(#) $FreeBSD$
*
*/
/*
* SPANS Signalling Manager
* ---------------------------
*
* Kernel XDR (External Data Representation) routines
*
*/
#include <netatm/kern_include.h>
#ifndef lint
__RCSID("@(#) $FreeBSD$");
#endif
/*
* This file contains code that has been copied and/or modified from
* the following FreeBSD files:
*
* /usr/src/lib/libc/xdr/xdr.c
* /usr/src/lib/libc/xdr/xdr_mem.c
*
* which are covered by the copyright notice below.
*/
/*
* 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(sun)
#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 1.2.4.2 1996/06/05 02:52:02 jkh Exp";*/
#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 <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 char xdr_zero[BYTES_PER_XDR_UNIT] = { 0, 0, 0, 0 };
/*
* XDR integers
*/
bool_t
xdr_int(xdrs, ip)
XDR *xdrs;
int *ip;
{
#ifdef lint
(void) (xdr_short(xdrs, (short *)ip));
return (xdr_long(xdrs, (long *)ip));
#else
if (sizeof (int) == sizeof (long)) {
return (xdr_long(xdrs, (long *)ip));
} else {
return (xdr_short(xdrs, (short *)ip));
}
#endif
}
/*
* XDR unsigned integers
*/
bool_t
xdr_u_int(xdrs, up)
XDR *xdrs;
u_int *up;
{
#ifdef lint
(void) (xdr_short(xdrs, (short *)up));
return (xdr_u_long(xdrs, (u_long *)up));
#else
if (sizeof (u_int) == sizeof (u_long)) {
return (xdr_u_long(xdrs, (u_long *)up));
} else {
return (xdr_short(xdrs, (short *)up));
}
#endif
}
/*
* XDR long integers
* same as xdr_u_long - open coded to save a proc call!
*/
bool_t
xdr_long(xdrs, lp)
register 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(xdrs, ulp)
register XDR *xdrs;
u_long *ulp;
{
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 (TRUE);
return (FALSE);
}
/*
* XDR short integers
*/
bool_t
xdr_short(xdrs, sp)
register 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)
register 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)
register 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;
{
#ifndef lint
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));
} else {
return (FALSE);
}
#else
(void) (xdr_short(xdrs, (short *)ep));
return (xdr_long(xdrs, (long *)ep));
#endif
}
/*
* 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)
register XDR *xdrs;
caddr_t cp;
register u_int cnt;
{
register 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;
if (xdrs->x_op == XDR_DECODE) {
if (!XDR_GETBYTES(xdrs, cp, cnt)) {
return (FALSE);
}
if (rndup == 0)
return (TRUE);
return (XDR_GETBYTES(xdrs, 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 implementation using kernel buffers
*/
#if defined(LIBC_SCCS) && !defined(lint)
/*static char *sccsid = "from: @(#)xdr_mem.c 1.19 87/08/11 Copyr 1984 Sun Micro";*/
/*static char *sccsid = "from: @(#)xdr_mem.c 2.1 88/07/29 4.0 RPCSRC";*/
/*static char *rcsid = "Id: xdr_mem.c,v 1.2.4.2 1996/06/05 02:52:04 jkh Exp";*/
#endif
/*
* xdr_mem.h, XDR implementation using memory buffers.
*
* Copyright (C) 1984, Sun Microsystems, Inc.
*
* If you have some data to be interpreted as external data representation
* or to be converted to external data representation in a memory buffer,
* then this is the package for you.
*
*/
void xdrmbuf_init __P((XDR *, KBuffer *, enum xdr_op));
static bool_t xdrmbuf_getlong __P((XDR *, long *));
static bool_t xdrmbuf_putlong __P((XDR *, long *));
static bool_t xdrmbuf_getbytes __P((XDR *, caddr_t, u_int));
static bool_t xdrmbuf_putbytes __P((XDR *, caddr_t, u_int));
static u_int xdrmbuf_getpos __P((XDR *));
static struct xdr_ops xdrmbuf_ops = {
xdrmbuf_getlong,
xdrmbuf_putlong,
xdrmbuf_getbytes,
xdrmbuf_putbytes,
xdrmbuf_getpos,
NULL,
NULL,
NULL
};
/*
* The procedure xdrmbuf_init initializes a stream descriptor for a
* kernel buffer.
*/
void
xdrmbuf_init(xdrs, m, op)
register XDR *xdrs;
KBuffer *m;
enum xdr_op op;
{
xdrs->x_op = op;
xdrs->x_ops = &xdrmbuf_ops;
xdrs->x_base = (caddr_t)m;
KB_DATASTART(m, xdrs->x_private, caddr_t);
xdrs->x_handy = KB_LEN(m);
}
static bool_t
xdrmbuf_getlong(xdrs, lp)
register XDR *xdrs;
long *lp;
{
/*
* See if long is contained in this buffer
*/
if ((xdrs->x_handy -= sizeof(long)) < 0) {
register KBuffer *m;
/*
* We (currently) don't allow a long to span a buffer
*/
if (xdrs->x_handy != -sizeof(long)) {
printf("xdrmbuf_getlong: data spans buffers\n");
return (FALSE);
}
/*
* Try to move to a chained buffer
*/
if ((m = (KBuffer *)(xdrs->x_base)) != NULL) {
m = KB_NEXT(m);
xdrs->x_base = (caddr_t)m;
}
if (m) {
/*
* Setup new buffer's info
*/
KB_DATASTART(m, xdrs->x_private, caddr_t);
if ((xdrs->x_handy = KB_LEN(m) - sizeof(long)) < 0) {
printf("xdrmbuf_getlong: short buffer\n");
return (FALSE);
}
} else {
/*
* No more buffers
*/
return (FALSE);
}
}
/*
* Return the long value
*/
*lp = (long)ntohl((u_long)(*((long *)(xdrs->x_private))));
/*
* Advance the data stream
*/
xdrs->x_private += sizeof(long);
return (TRUE);
}
static bool_t
xdrmbuf_putlong(xdrs, lp)
register XDR *xdrs;
long *lp;
{
/*
* See if long will fit in this buffer
*/
if ((xdrs->x_handy -= sizeof(long)) < 0) {
register KBuffer *m;
/*
* We (currently) don't allow a long to span a buffer
*/
if (xdrs->x_handy != -sizeof(long)) {
printf("xdrmbuf_putlong: data spans buffers\n");
return (FALSE);
}
/*
* Try to move to a chained buffer
*/
if ((m = (KBuffer *)(xdrs->x_base)) != NULL) {
m = KB_NEXT(m);
xdrs->x_base = (caddr_t)m;
}
if (m) {
/*
* Setup new buffer's info
*/
KB_DATASTART(m, xdrs->x_private, caddr_t);
if ((xdrs->x_handy = KB_LEN(m) - sizeof(long)) < 0) {
printf("xdrmbuf_putlong: short buffer\n");
return (FALSE);
}
} else {
/*
* No more buffers
*/
return (FALSE);
}
}
/*
* Store the long value into our buffer
*/
*(long *)xdrs->x_private = (long)htonl((u_long)(*lp));
/*
* Advance the data stream
*/
xdrs->x_private += sizeof(long);
return (TRUE);
}
static bool_t
xdrmbuf_getbytes(xdrs, addr, len)
register XDR *xdrs;
caddr_t addr;
register u_int len;
{
while (len > 0) {
u_int copy;
if (xdrs->x_handy <= 0) {
register KBuffer *m;
/*
* No data in current buffer, move to a chained buffer
*/
if ((m = (KBuffer *)(xdrs->x_base)) != NULL) {
m = KB_NEXT(m);
xdrs->x_base = (caddr_t)m;
}
if (m) {
/*
* Setup new buffer's info
*/
KB_DATASTART(m, xdrs->x_private, caddr_t);
xdrs->x_handy = KB_LEN(m);
} else {
/*
* No more buffers
*/
return (FALSE);
}
}
/*
* Copy from buffer to user's space
*/
copy = MIN(len, xdrs->x_handy);
KM_COPY(xdrs->x_private, addr, copy);
/*
* Update data stream controls
*/
xdrs->x_private += copy;
xdrs->x_handy -= copy;
addr += copy;
len -= copy;
}
return (TRUE);
}
static bool_t
xdrmbuf_putbytes(xdrs, addr, len)
register XDR *xdrs;
caddr_t addr;
register u_int len;
{
while (len > 0) {
u_int copy;
if (xdrs->x_handy <= 0) {
register KBuffer *m;
/*
* No data in current buffer, move to a chained buffer
*/
if ((m = (KBuffer *)(xdrs->x_base)) != NULL) {
m = KB_NEXT(m);
xdrs->x_base = (caddr_t)m;
}
if (m) {
/*
* Setup new buffer's info
*/
KB_DATASTART(m, xdrs->x_private, caddr_t);
xdrs->x_handy = KB_LEN(m);
} else {
/*
* No more buffers
*/
return (FALSE);
}
}
/*
* Copy from user's space into buffer
*/
copy = MIN(len, xdrs->x_handy);
KM_COPY(addr, xdrs->x_private, copy);
/*
* Update data stream controls
*/
xdrs->x_private += copy;
xdrs->x_handy -= copy;
addr += copy;
len -= copy;
}
return (TRUE);
}
static u_int
xdrmbuf_getpos(xdrs)
register XDR *xdrs;
{
return ((u_int)xdrs->x_private - (u_int)xdrs->x_base);
}
#endif /* !defined(sun) */
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