1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27/*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
28/*	  All Rights Reserved  	*/
29
30/*
31 * Portions of this source code were derived from Berkeley 4.3 BSD
32 * under license from the Regents of the University of California.
33 */
34
35#pragma ident	"%Z%%M%	%I%	%E% SMI"
36
37/*
38 * rpc_calmsg.c
39 */
40
41#include <sys/param.h>
42#include <sys/types.h>
43#include <sys/t_lock.h>
44#include <sys/systm.h>
45
46#include <rpc/types.h>
47#include <rpc/xdr.h>
48#include <rpc/auth.h>
49#include <rpc/clnt.h>
50#include <rpc/rpc_msg.h>
51
52/*
53 * XDR a call message
54 */
55bool_t
56xdr_callmsg(XDR *xdrs, struct rpc_msg *cmsg)
57{
58	int32_t *buf;
59	struct opaque_auth *oa;
60
61	if (xdrs->x_op == XDR_ENCODE) {
62		if (cmsg->rm_call.cb_cred.oa_length > MAX_AUTH_BYTES)
63			return (FALSE);
64		if (cmsg->rm_call.cb_verf.oa_length > MAX_AUTH_BYTES)
65			return (FALSE);
66		buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT +
67		    RNDUP(cmsg->rm_call.cb_cred.oa_length) +
68		    2 * BYTES_PER_XDR_UNIT +
69		    RNDUP(cmsg->rm_call.cb_verf.oa_length));
70		if (buf != NULL) {
71			IXDR_PUT_INT32(buf, cmsg->rm_xid);
72			IXDR_PUT_ENUM(buf, cmsg->rm_direction);
73			if (cmsg->rm_direction != CALL)
74				return (FALSE);
75			IXDR_PUT_INT32(buf, cmsg->rm_call.cb_rpcvers);
76			if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION)
77				return (FALSE);
78			IXDR_PUT_INT32(buf, cmsg->rm_call.cb_prog);
79			IXDR_PUT_INT32(buf, cmsg->rm_call.cb_vers);
80			IXDR_PUT_INT32(buf, cmsg->rm_call.cb_proc);
81			oa = &cmsg->rm_call.cb_cred;
82			IXDR_PUT_ENUM(buf, oa->oa_flavor);
83			IXDR_PUT_INT32(buf, oa->oa_length);
84			if (oa->oa_length) {
85				bcopy(oa->oa_base, buf, oa->oa_length);
86				buf += RNDUP(oa->oa_length) / sizeof (int32_t);
87			}
88			oa = &cmsg->rm_call.cb_verf;
89			IXDR_PUT_ENUM(buf, oa->oa_flavor);
90			IXDR_PUT_INT32(buf, oa->oa_length);
91			if (oa->oa_length)
92				bcopy(oa->oa_base, buf, oa->oa_length);
93			return (TRUE);
94		}
95	}
96	if (xdrs->x_op == XDR_DECODE) {
97		buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT);
98		if (buf != NULL) {
99			cmsg->rm_xid = IXDR_GET_INT32(buf);
100			cmsg->rm_direction = IXDR_GET_ENUM(buf, enum msg_type);
101			if (cmsg->rm_direction != CALL)
102				return (FALSE);
103			cmsg->rm_call.cb_rpcvers = IXDR_GET_INT32(buf);
104			if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION)
105				return (FALSE);
106			cmsg->rm_call.cb_prog = IXDR_GET_INT32(buf);
107			cmsg->rm_call.cb_vers = IXDR_GET_INT32(buf);
108			cmsg->rm_call.cb_proc = IXDR_GET_INT32(buf);
109			oa = &cmsg->rm_call.cb_cred;
110			oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
111			oa->oa_length = IXDR_GET_INT32(buf);
112			if (oa->oa_length) {
113				if (oa->oa_length > MAX_AUTH_BYTES)
114					return (FALSE);
115				if (oa->oa_base == NULL)
116					oa->oa_base = (caddr_t)
117					    mem_alloc(oa->oa_length);
118				buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
119				if (buf == NULL) {
120					if (xdr_opaque(xdrs, oa->oa_base,
121					    oa->oa_length) == FALSE)
122						return (FALSE);
123				} else {
124					bcopy(buf, oa->oa_base, oa->oa_length);
125				}
126			}
127			oa = &cmsg->rm_call.cb_verf;
128			buf = XDR_INLINE(xdrs, 2 * BYTES_PER_XDR_UNIT);
129			if (buf == NULL) {
130				if (xdr_enum(xdrs, &oa->oa_flavor) == FALSE ||
131				    xdr_u_int(xdrs, &oa->oa_length) == FALSE)
132					return (FALSE);
133			} else {
134				oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
135				oa->oa_length = IXDR_GET_INT32(buf);
136			}
137			if (oa->oa_length) {
138				if (oa->oa_length > MAX_AUTH_BYTES)
139					return (FALSE);
140				if (oa->oa_base == NULL)
141					oa->oa_base = (caddr_t)
142					    mem_alloc(oa->oa_length);
143				buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
144				if (buf == NULL) {
145					if (xdr_opaque(xdrs, oa->oa_base,
146					    oa->oa_length) == FALSE)
147						return (FALSE);
148				} else {
149					bcopy(buf, oa->oa_base, oa->oa_length);
150				}
151			}
152			return (TRUE);
153		}
154	}
155
156	if (xdr_u_int(xdrs, &(cmsg->rm_xid)) &&
157	    xdr_enum(xdrs, (enum_t *)&(cmsg->rm_direction)) &&
158	    cmsg->rm_direction == CALL &&
159	    xdr_rpcvers(xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
160	    cmsg->rm_call.cb_rpcvers == RPC_MSG_VERSION &&
161	    xdr_rpcprog(xdrs, &(cmsg->rm_call.cb_prog)) &&
162	    xdr_rpcvers(xdrs, &(cmsg->rm_call.cb_vers)) &&
163	    xdr_rpcproc(xdrs, &(cmsg->rm_call.cb_proc)) &&
164	    xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_cred)))
165		return (xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_verf)));
166
167	return (FALSE);
168}
169