805 lines
16 KiB
C
805 lines
16 KiB
C
/* @(#)xdr.c 2.1 88/07/29 4.0 RPCSRC */
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/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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#if !defined(lint) && defined(SCCSIDS)
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static char sccsid[] = "@(#)xdr.c 1.35 87/08/12";
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#endif
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/*
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* xdr.c, Generic XDR routines implementation.
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*
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* Copyright (C) 1986, Sun Microsystems, Inc.
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*
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* These are the "generic" xdr routines used to serialize and de-serialize
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* most common data items. See xdr.h for more info on the interface to
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* xdr.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <rpc/types.h>
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#include <rpc/xdr.h>
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#include <string.h>
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/*
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* constants specific to the xdr "protocol"
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*/
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#define XDR_FALSE ((long) 0)
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#define XDR_TRUE ((long) 1)
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#define LASTUNSIGNED ((unsigned int) 0-1)
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/*
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* for unit alignment
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*/
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static char xdr_zero[BYTES_PER_XDR_UNIT] = { 0, 0, 0, 0 };
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/*
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* Free a data structure using XDR
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* Not a filter, but a convenient utility nonetheless
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*/
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void xdr_free(xdrproc_t proc, char* objp)
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{
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XDR x;
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x.x_op = XDR_FREE;
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(*proc) (&x, objp);
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}
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/*
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* XDR nothing
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*/
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bool_t xdr_void( /* xdrs, addr */ )
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/* XDR *xdrs; */
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/* char* addr; */
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{
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return (TRUE);
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}
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/*
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* XDR integers
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*/
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bool_t xdr_int(XDR* xdrs, int* ip)
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{
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if (sizeof(int) == sizeof(long)) {
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return (xdr_long(xdrs, (long *) ip));
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} else if (sizeof(int) < sizeof(long)) {
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long l;
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switch (xdrs->x_op) {
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case XDR_ENCODE:
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l = (long) *ip;
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return XDR_PUTLONG(xdrs, &l);
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case XDR_DECODE:
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if (!XDR_GETLONG(xdrs, &l))
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return FALSE;
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*ip = (int) l;
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case XDR_FREE:
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return TRUE;
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}
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return FALSE;
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} else {
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return (xdr_short(xdrs, (short *) ip));
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}
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}
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/*
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* XDR unsigned integers
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*/
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bool_t xdr_u_int(XDR* xdrs, unsigned int* up)
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{
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if (sizeof(unsigned int) == sizeof(unsigned long)) {
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return (xdr_u_long(xdrs, (unsigned long *) up));
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} else if (sizeof(unsigned int) < sizeof(unsigned long)) {
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unsigned long l;
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switch (xdrs->x_op) {
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case XDR_ENCODE:
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l = (unsigned long) *up;
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return XDR_PUTLONG(xdrs, (long*)&l);
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case XDR_DECODE:
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if (!XDR_GETLONG(xdrs, (long*)&l))
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return FALSE;
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*up = (unsigned int) l;
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case XDR_FREE:
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return TRUE;
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}
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return FALSE;
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} else {
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return (xdr_short(xdrs, (short *) up));
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}
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}
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/*
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* XDR long integers
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* same as xdr_u_long - open coded to save a proc call!
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*/
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bool_t xdr_long(XDR* xdrs, long* lp)
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{
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if (xdrs->x_op == XDR_ENCODE
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&& (sizeof(int32_t) == sizeof(long)
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|| (int32_t) *lp == *lp))
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return (XDR_PUTLONG(xdrs, lp));
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if (xdrs->x_op == XDR_DECODE)
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return (XDR_GETLONG(xdrs, lp));
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if (xdrs->x_op == XDR_FREE)
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return (TRUE);
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return (FALSE);
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}
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/*
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* XDR unsigned long integers
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* same as xdr_long - open coded to save a proc call!
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*/
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bool_t xdr_u_long(XDR* xdrs, unsigned long* ulp)
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{
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if (xdrs->x_op == XDR_DECODE) {
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long l;
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if (XDR_GETLONG(xdrs, &l) == FALSE)
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return FALSE;
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*ulp = (uint32_t) l;
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return TRUE;
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}
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if (xdrs->x_op == XDR_ENCODE) {
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if (sizeof(uint32_t) != sizeof(unsigned long)
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&& (uint32_t) *ulp != *ulp)
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return FALSE;
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return (XDR_PUTLONG(xdrs, (long *) ulp));
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}
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if (xdrs->x_op == XDR_FREE)
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return (TRUE);
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return (FALSE);
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}
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/*
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* XDR long long integers
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*/
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bool_t xdr_longlong_t (XDR * xdrs, long long* llp)
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{
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int32_t t1, t2;
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switch (xdrs->x_op)
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{
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case XDR_ENCODE:
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t1 = (int32_t) ((*llp) >> 32);
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t2 = (int32_t) (*llp);
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return (XDR_PUTLONG (xdrs, &t1) && XDR_PUTLONG (xdrs, &t2));
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case XDR_DECODE:
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if (!XDR_GETLONG (xdrs, &t1) || !XDR_GETLONG (xdrs, &t2))
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return FALSE;
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*llp = ((int64_t) t1) << 32;
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*llp |= (uint32_t) t2;
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return TRUE;
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case XDR_FREE:
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return TRUE;
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}
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return FALSE;
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}
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/*
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* XDR unsigned long long integers
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*/
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bool_t xdr_u_longlong_t (XDR * xdrs, unsigned long long* ullp)
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{
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uint32_t t1, t2;
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switch (xdrs->x_op)
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{
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case XDR_ENCODE:
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t1 = (uint32_t) ((*ullp) >> 32);
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t2 = (uint32_t) (*ullp);
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return (XDR_PUTLONG (xdrs, (int32_t *)&t1) &&
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XDR_PUTLONG (xdrs, (int32_t *)&t2));
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case XDR_DECODE:
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if (!XDR_GETLONG (xdrs, (int32_t *)&t1) ||
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!XDR_GETLONG (xdrs, (int32_t *)&t2))
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return FALSE;
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*ullp = ((uint64_t) t1) << 32;
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*ullp |= t2;
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return TRUE;
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case XDR_FREE:
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return TRUE;
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}
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return FALSE;
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}
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/*
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* XDR short integers
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*/
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bool_t xdr_short(XDR* xdrs, short* sp)
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{
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long l;
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switch (xdrs->x_op) {
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case XDR_ENCODE:
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l = (long) *sp;
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return (XDR_PUTLONG(xdrs, &l));
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case XDR_DECODE:
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if (!XDR_GETLONG(xdrs, &l)) {
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return (FALSE);
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}
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*sp = (short) l;
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return (TRUE);
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case XDR_FREE:
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return (TRUE);
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}
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return (FALSE);
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}
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/*
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* XDR unsigned short integers
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*/
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bool_t xdr_u_short(XDR* xdrs, unsigned short* usp)
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{
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unsigned long l;
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switch (xdrs->x_op) {
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case XDR_ENCODE:
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l = (unsigned long) * usp;
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return (XDR_PUTLONG(xdrs, (long*)&l));
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case XDR_DECODE:
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if (!XDR_GETLONG(xdrs, (long*)&l)) {
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return (FALSE);
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}
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*usp = (unsigned short) l;
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return (TRUE);
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case XDR_FREE:
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return (TRUE);
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}
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return (FALSE);
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}
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/*
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* XDR a char
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*/
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bool_t xdr_char(XDR* xdrs, char* cp)
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{
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int i;
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i = (*cp);
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if (!xdr_int(xdrs, &i)) {
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return (FALSE);
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}
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*cp = i;
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return (TRUE);
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}
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/*
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* XDR an unsigned char
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*/
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bool_t xdr_u_char(XDR* xdrs, unsigned char* cp)
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{
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unsigned int u;
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u = (*cp);
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if (!xdr_u_int(xdrs, &u)) {
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return (FALSE);
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}
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*cp = u;
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return (TRUE);
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}
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/*
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* XDR booleans
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*/
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bool_t xdr_bool(xdrs, bp)
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register XDR *xdrs;
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bool_t *bp;
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{
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long lb;
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switch (xdrs->x_op) {
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case XDR_ENCODE:
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lb = *bp ? XDR_TRUE : XDR_FALSE;
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return (XDR_PUTLONG(xdrs, &lb));
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case XDR_DECODE:
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if (!XDR_GETLONG(xdrs, &lb)) {
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return (FALSE);
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}
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*bp = (lb == XDR_FALSE) ? FALSE : TRUE;
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return (TRUE);
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case XDR_FREE:
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return (TRUE);
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}
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return (FALSE);
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}
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/*
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* XDR enumerations
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*/
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bool_t xdr_enum(xdrs, ep)
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XDR *xdrs;
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enum_t *ep;
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{
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/*
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* enums are treated as ints
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*/
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return (xdr_long(xdrs, (long *) ep));
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}
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/*
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* XDR opaque data
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* Allows the specification of a fixed size sequence of opaque bytes.
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* cp points to the opaque object and cnt gives the byte length.
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*/
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bool_t xdr_opaque(xdrs, cp, cnt)
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register XDR *xdrs;
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char* cp;
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register unsigned int cnt;
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{
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register unsigned int rndup;
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static char crud[BYTES_PER_XDR_UNIT];
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/*
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* if no data we are done
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*/
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if (cnt == 0)
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return (TRUE);
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/*
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* round byte count to full xdr units
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*/
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rndup = cnt % BYTES_PER_XDR_UNIT;
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if (rndup > 0)
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rndup = BYTES_PER_XDR_UNIT - rndup;
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if (xdrs->x_op == XDR_DECODE) {
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if (!XDR_GETBYTES(xdrs, cp, cnt)) {
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return (FALSE);
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}
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if (rndup == 0)
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return (TRUE);
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return (XDR_GETBYTES(xdrs, crud, rndup));
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}
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if (xdrs->x_op == XDR_ENCODE) {
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if (!XDR_PUTBYTES(xdrs, cp, cnt)) {
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return (FALSE);
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}
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if (rndup == 0)
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return (TRUE);
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return (XDR_PUTBYTES(xdrs, xdr_zero, rndup));
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}
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if (xdrs->x_op == XDR_FREE) {
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return (TRUE);
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}
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return (FALSE);
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}
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/*
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* XDR counted bytes
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* *cpp is a pointer to the bytes, *sizep is the count.
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* If *cpp is NULL maxsize bytes are allocated
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*/
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bool_t xdr_bytes(xdrs, cpp, sizep, maxsize)
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register XDR *xdrs;
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char **cpp;
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register unsigned int *sizep;
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unsigned int maxsize;
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{
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register char *sp = *cpp; /* sp is the actual string pointer */
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register unsigned int nodesize;
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/*
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* first deal with the length since xdr bytes are counted
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*/
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if (!xdr_u_int(xdrs, sizep)) {
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return (FALSE);
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}
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nodesize = *sizep;
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if ((nodesize > maxsize) && (xdrs->x_op != XDR_FREE)) {
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return (FALSE);
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}
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/*
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* now deal with the actual bytes
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*/
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switch (xdrs->x_op) {
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case XDR_DECODE:
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if (nodesize == 0) {
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return (TRUE);
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}
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if (sp == NULL) {
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*cpp = sp = (char *) rt_malloc(nodesize);
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}
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if (sp == NULL) {
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rt_kprintf("xdr_bytes: out of memory\n");
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return (FALSE);
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}
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/* fall into ... */
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case XDR_ENCODE:
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return (xdr_opaque(xdrs, sp, nodesize));
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case XDR_FREE:
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if (sp != NULL) {
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rt_free(sp);
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*cpp = NULL;
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}
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return (TRUE);
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}
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return (FALSE);
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}
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/*
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* Implemented here due to commonality of the object.
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*/
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bool_t xdr_netobj(xdrs, np)
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XDR *xdrs;
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struct netobj *np;
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{
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return (xdr_bytes(xdrs, &np->n_bytes, &np->n_len, MAX_NETOBJ_SZ));
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}
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/*
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* XDR a descriminated union
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* Support routine for discriminated unions.
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* You create an array of xdrdiscrim structures, terminated with
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* an entry with a null procedure pointer. The routine gets
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* the discriminant value and then searches the array of xdrdiscrims
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* looking for that value. It calls the procedure given in the xdrdiscrim
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* to handle the discriminant. If there is no specific routine a default
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* routine may be called.
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* If there is no specific or default routine an error is returned.
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*/
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bool_t xdr_union(XDR* xdrs, enum_t* dscmp, char* unp, const struct xdr_discrim* choices, xdrproc_t dfault)
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{
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register enum_t dscm;
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/*
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* we deal with the discriminator; it's an enum
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*/
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if (!xdr_enum(xdrs, dscmp)) {
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return (FALSE);
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}
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dscm = *dscmp;
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/*
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* search choices for a value that matches the discriminator.
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* if we find one, execute the xdr routine for that value.
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*/
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for (; choices->proc != NULL_xdrproc_t; choices++) {
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if (choices->value == dscm)
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return ((*(choices->proc)) (xdrs, unp, LASTUNSIGNED));
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}
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/*
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* no match - execute the default xdr routine if there is one
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*/
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return ((dfault == NULL_xdrproc_t) ? FALSE :
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(*dfault) (xdrs, unp, LASTUNSIGNED));
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}
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/*
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* Non-portable xdr primitives.
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* Care should be taken when moving these routines to new architectures.
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*/
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/*
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* XDR null terminated ASCII strings
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* xdr_string deals with "C strings" - arrays of bytes that are
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* terminated by a NULL character. The parameter cpp references a
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* pointer to storage; If the pointer is null, then the necessary
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* storage is allocated. The last parameter is the max allowed length
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* of the string as specified by a protocol.
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*/
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bool_t xdr_string(xdrs, cpp, maxsize)
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register XDR *xdrs;
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char **cpp;
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unsigned int maxsize;
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{
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register char *sp = *cpp; /* sp is the actual string pointer */
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unsigned int size;
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unsigned int nodesize;
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/*
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* first deal with the length since xdr strings are counted-strings
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*/
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switch (xdrs->x_op) {
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case XDR_FREE:
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if (sp == NULL) {
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return (TRUE); /* already free */
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}
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/* fall through... */
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case XDR_ENCODE:
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size = strlen(sp);
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break;
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}
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if (!xdr_u_int(xdrs, &size)) {
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return (FALSE);
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}
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if (size > maxsize) {
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return (FALSE);
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}
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nodesize = size + 1;
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/*
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* now deal with the actual bytes
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*/
|
|
switch (xdrs->x_op) {
|
|
|
|
case XDR_DECODE:
|
|
if (nodesize == 0) {
|
|
return (TRUE);
|
|
}
|
|
if (sp == NULL)
|
|
*cpp = sp = (char *) rt_malloc(nodesize);
|
|
if (sp == NULL) {
|
|
rt_kprintf("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:
|
|
rt_free(sp);
|
|
*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);
|
|
}
|
|
|
|
/*
|
|
* XDR an array of arbitrary elements
|
|
* *addrp is a pointer to the array, *sizep is the number of elements.
|
|
* If addrp is NULL (*sizep * elsize) bytes are allocated.
|
|
* elsize is the size (in bytes) of each element, and elproc is the
|
|
* xdr procedure to call to handle each element of the array.
|
|
*/
|
|
bool_t xdr_array(xdrs, addrp, sizep, maxsize, elsize, elproc)
|
|
register XDR *xdrs;
|
|
char* *addrp; /* array pointer */
|
|
unsigned int *sizep; /* number of elements */
|
|
unsigned int maxsize; /* max numberof elements */
|
|
unsigned int elsize; /* size in bytes of each element */
|
|
xdrproc_t elproc; /* xdr routine to handle each element */
|
|
{
|
|
register unsigned int i;
|
|
register char* target = *addrp;
|
|
register unsigned int c; /* the actual element count */
|
|
register bool_t stat = TRUE;
|
|
register unsigned int nodesize;
|
|
|
|
/* like strings, arrays are really counted arrays */
|
|
if (!xdr_u_int(xdrs, sizep)) {
|
|
return (FALSE);
|
|
}
|
|
c = *sizep;
|
|
if ((c > maxsize) && (xdrs->x_op != XDR_FREE)) {
|
|
return (FALSE);
|
|
}
|
|
/* duh, look for integer overflow (fefe) */
|
|
{
|
|
unsigned int i;
|
|
nodesize = 0;
|
|
for (i=c; i; --i) {
|
|
unsigned int tmp=nodesize+elsize;
|
|
if (tmp<nodesize) /* overflow */
|
|
return FALSE;
|
|
nodesize=tmp;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* if we are deserializing, we may need to allocate an array.
|
|
* We also save time by checking for a null array if we are freeing.
|
|
*/
|
|
if (target == NULL)
|
|
switch (xdrs->x_op) {
|
|
case XDR_DECODE:
|
|
if (c == 0)
|
|
return (TRUE);
|
|
*addrp = target = rt_malloc(nodesize);
|
|
if (target == NULL) {
|
|
rt_kprintf("xdr_array: out of memory\n");
|
|
return (FALSE);
|
|
}
|
|
memset(target, 0, nodesize);
|
|
break;
|
|
|
|
case XDR_FREE:
|
|
return (TRUE);
|
|
}
|
|
|
|
/*
|
|
* now we xdr each element of array
|
|
*/
|
|
for (i = 0; (i < c) && stat; i++) {
|
|
stat = (*elproc) (xdrs, target, LASTUNSIGNED);
|
|
target += elsize;
|
|
}
|
|
|
|
/*
|
|
* the array may need freeing
|
|
*/
|
|
if (xdrs->x_op == XDR_FREE) {
|
|
rt_free(*addrp);
|
|
*addrp = NULL;
|
|
}
|
|
return (stat);
|
|
}
|
|
|
|
/*
|
|
* xdr_vector():
|
|
*
|
|
* XDR a fixed length array. Unlike variable-length arrays,
|
|
* the storage of fixed length arrays is static and unfreeable.
|
|
* > basep: base of the array
|
|
* > size: size of the array
|
|
* > elemsize: size of each element
|
|
* > xdr_elem: routine to XDR each element
|
|
*/
|
|
bool_t xdr_vector(xdrs, basep, nelem, elemsize, xdr_elem)
|
|
register XDR *xdrs;
|
|
register char *basep;
|
|
register unsigned int nelem;
|
|
register unsigned int elemsize;
|
|
register xdrproc_t xdr_elem;
|
|
{
|
|
register unsigned int i;
|
|
register char *elptr;
|
|
|
|
elptr = basep;
|
|
for (i = 0; i < nelem; i++) {
|
|
if (!(*xdr_elem) (xdrs, elptr, LASTUNSIGNED)) {
|
|
return (FALSE);
|
|
}
|
|
elptr += elemsize;
|
|
}
|
|
return (TRUE);
|
|
}
|
|
|
|
|
|
/*
|
|
* XDR an indirect pointer
|
|
* xdr_reference is for recursively translating a structure that is
|
|
* referenced by a pointer inside the structure that is currently being
|
|
* translated. pp references a pointer to storage. If *pp is null
|
|
* the necessary storage is allocated.
|
|
* size is the sizeof the referneced structure.
|
|
* proc is the routine to handle the referenced structure.
|
|
*/
|
|
bool_t xdr_reference(xdrs, pp, size, proc)
|
|
register XDR *xdrs;
|
|
char* *pp; /* the pointer to work on */
|
|
unsigned int size; /* size of the object pointed to */
|
|
xdrproc_t proc; /* xdr routine to handle the object */
|
|
{
|
|
register char* loc = *pp;
|
|
register bool_t stat;
|
|
|
|
if (loc == NULL)
|
|
switch (xdrs->x_op) {
|
|
case XDR_FREE:
|
|
return (TRUE);
|
|
|
|
case XDR_DECODE:
|
|
*pp = loc = (char*) rt_malloc(size);
|
|
if (loc == NULL) {
|
|
rt_kprintf("xdr_reference: out of memory\n");
|
|
return (FALSE);
|
|
}
|
|
memset(loc, 0, (int) size);
|
|
break;
|
|
}
|
|
|
|
stat = (*proc) (xdrs, loc, LASTUNSIGNED);
|
|
|
|
if (xdrs->x_op == XDR_FREE) {
|
|
rt_free(loc);
|
|
*pp = NULL;
|
|
}
|
|
return (stat);
|
|
}
|
|
|
|
|
|
/*
|
|
* xdr_pointer():
|
|
*
|
|
* XDR a pointer to a possibly recursive data structure. This
|
|
* differs with xdr_reference in that it can serialize/deserialiaze
|
|
* trees correctly.
|
|
*
|
|
* What's sent is actually a union:
|
|
*
|
|
* union object_pointer switch (boolean b) {
|
|
* case TRUE: object_data data;
|
|
* case FALSE: void nothing;
|
|
* }
|
|
*
|
|
* > objpp: Pointer to the pointer to the object.
|
|
* > obj_size: size of the object.
|
|
* > xdr_obj: routine to XDR an object.
|
|
*
|
|
*/
|
|
bool_t xdr_pointer(xdrs, objpp, obj_size, xdr_obj)
|
|
register XDR *xdrs;
|
|
char **objpp;
|
|
unsigned int obj_size;
|
|
xdrproc_t xdr_obj;
|
|
{
|
|
|
|
bool_t more_data;
|
|
|
|
more_data = (*objpp != NULL);
|
|
if (!xdr_bool(xdrs, &more_data)) {
|
|
return (FALSE);
|
|
}
|
|
if (!more_data) {
|
|
*objpp = NULL;
|
|
return (TRUE);
|
|
}
|
|
return (xdr_reference(xdrs, objpp, obj_size, xdr_obj));
|
|
}
|