xref: /titanic_44/usr/src/lib/libnsl/rpc/rpc_callmsg.c (revision 7014882c6a3672fd0e5d60200af8643ae53c5928)
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 /*
24  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
25  * Use is subject to license terms.
26  */
27 
28 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
29 /* All Rights Reserved */
30 /*
31  * Portions of this source code were derived from Berkeley
32  * 4.3 BSD under license from the Regents of the University of
33  * California.
34  */
35 
36 #pragma ident	"%Z%%M%	%I%	%E% SMI"
37 
38 #include "mt.h"
39 #include <stdlib.h>
40 #include <sys/param.h>
41 #include <rpc/rpc.h>
42 #include <syslog.h>
43 #include <sys/byteorder.h>
44 
45 extern bool_t xdr_opaque_auth(XDR *, struct opaque_auth *);
46 
47 /*
48  * XDR a call message
49  */
50 bool_t
51 xdr_callmsg(XDR *xdrs, struct rpc_msg *cmsg)
52 {
53 	rpc_inline_t *buf;
54 	struct opaque_auth *oa;
55 
56 	if (xdrs->x_op == XDR_ENCODE) {
57 		if (cmsg->rm_call.cb_cred.oa_length > MAX_AUTH_BYTES)
58 			return (FALSE);
59 		if (cmsg->rm_call.cb_verf.oa_length > MAX_AUTH_BYTES)
60 			return (FALSE);
61 		buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT
62 			+ RNDUP(cmsg->rm_call.cb_cred.oa_length)
63 			+ 2 * BYTES_PER_XDR_UNIT
64 			+ RNDUP(cmsg->rm_call.cb_verf.oa_length));
65 		if (buf != NULL) {
66 			IXDR_PUT_INT32(buf, cmsg->rm_xid);
67 			IXDR_PUT_ENUM(buf, cmsg->rm_direction);
68 			if (cmsg->rm_direction != CALL)
69 				return (FALSE);
70 			IXDR_PUT_INT32(buf, cmsg->rm_call.cb_rpcvers);
71 			if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION)
72 				return (FALSE);
73 			IXDR_PUT_INT32(buf, cmsg->rm_call.cb_prog);
74 			IXDR_PUT_INT32(buf, cmsg->rm_call.cb_vers);
75 			IXDR_PUT_INT32(buf, cmsg->rm_call.cb_proc);
76 			oa = &cmsg->rm_call.cb_cred;
77 			IXDR_PUT_ENUM(buf, oa->oa_flavor);
78 			IXDR_PUT_INT32(buf, oa->oa_length);
79 			if (oa->oa_length) {
80 				(void) memcpy(buf, oa->oa_base, oa->oa_length);
81 				buf += RNDUP(oa->oa_length) / sizeof (int32_t);
82 			}
83 			oa = &cmsg->rm_call.cb_verf;
84 			IXDR_PUT_ENUM(buf, oa->oa_flavor);
85 			IXDR_PUT_INT32(buf, oa->oa_length);
86 			if (oa->oa_length) {
87 				(void) memcpy(buf, oa->oa_base, oa->oa_length);
88 				/*
89 				 * no real need....
90 				 * buf += RNDUP(oa->oa_length) / sizeof
91 				 * (int32_t);
92 				 */
93 			}
94 			return (TRUE);
95 		}
96 	}
97 	if (xdrs->x_op == XDR_DECODE) {
98 		buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT);
99 		if (buf != NULL) {
100 			cmsg->rm_xid = IXDR_GET_INT32(buf);
101 			cmsg->rm_direction = IXDR_GET_ENUM(buf, enum msg_type);
102 			if (cmsg->rm_direction != CALL)
103 				return (FALSE);
104 			cmsg->rm_call.cb_rpcvers = IXDR_GET_INT32(buf);
105 			if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION)
106 				return (FALSE);
107 			cmsg->rm_call.cb_prog = IXDR_GET_INT32(buf);
108 			cmsg->rm_call.cb_vers = IXDR_GET_INT32(buf);
109 			cmsg->rm_call.cb_proc = IXDR_GET_INT32(buf);
110 			oa = &cmsg->rm_call.cb_cred;
111 			oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
112 			oa->oa_length = IXDR_GET_INT32(buf);
113 			if (oa->oa_length) {
114 				if (oa->oa_length > MAX_AUTH_BYTES)
115 					return (FALSE);
116 				if (oa->oa_base == NULL) {
117 					oa->oa_base = malloc(oa->oa_length);
118 					if (oa->oa_base == NULL) {
119 						syslog(LOG_ERR,
120 							"xdr_callmsg : "
121 							"out of memory.");
122 						return (FALSE);
123 					}
124 				}
125 				buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
126 				if (buf == NULL) {
127 					if (xdr_opaque(xdrs, oa->oa_base,
128 					    oa->oa_length) == FALSE)
129 						return (FALSE);
130 				} else {
131 					(void) memcpy(oa->oa_base,
132 					    buf, (size_t)oa->oa_length);
133 					/*
134 					 * no real need....
135 					 * buf += RNDUP(oa->oa_length) /
136 					 *	(int)sizeof (int32_t);
137 					 */
138 				}
139 			}
140 			oa = &cmsg->rm_call.cb_verf;
141 			buf = XDR_INLINE(xdrs, 2 * BYTES_PER_XDR_UNIT);
142 			if (buf == NULL) {
143 				if (xdr_enum(xdrs, &oa->oa_flavor) == FALSE ||
144 				    xdr_u_int(xdrs, &oa->oa_length) == FALSE)
145 					return (FALSE);
146 			} else {
147 				oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
148 				oa->oa_length = IXDR_GET_INT32(buf);
149 			}
150 			if (oa->oa_length) {
151 				if (oa->oa_length > MAX_AUTH_BYTES)
152 					return (FALSE);
153 				if (oa->oa_base == NULL) {
154 					oa->oa_base = malloc(oa->oa_length);
155 					if (oa->oa_base == NULL) {
156 						syslog(LOG_ERR,
157 							"xdr_callmsg : "
158 							"out of memory.");
159 						return (FALSE);
160 					}
161 				}
162 				buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
163 				if (buf == NULL) {
164 					if (xdr_opaque(xdrs, oa->oa_base,
165 					    oa->oa_length) == FALSE)
166 						return (FALSE);
167 				} else {
168 					(void) memcpy(oa->oa_base,
169 					    buf, (size_t)oa->oa_length);
170 					/*
171 					 * no real need...
172 					 * buf += RNDUP(oa->oa_length) /
173 					 *	(int)sizeof (int32_t);
174 					 */
175 				}
176 			}
177 			return (TRUE);
178 		}
179 	}
180 	if (xdr_u_int(xdrs, &(cmsg->rm_xid)) &&
181 	    xdr_enum(xdrs, (enum_t *)&(cmsg->rm_direction)) &&
182 	    (cmsg->rm_direction == CALL) &&
183 	    xdr_u_int(xdrs, (uint_t *)&(cmsg->rm_call.cb_rpcvers)) &&
184 	    (cmsg->rm_call.cb_rpcvers == RPC_MSG_VERSION) &&
185 	    xdr_u_int(xdrs, (uint_t *)&(cmsg->rm_call.cb_prog)) &&
186 	    xdr_u_int(xdrs, (uint_t *)&(cmsg->rm_call.cb_vers)) &&
187 	    xdr_u_int(xdrs, (uint_t *)&(cmsg->rm_call.cb_proc)) &&
188 	    xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_cred))) {
189 		return (xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_verf)));
190 	}
191 	return (FALSE);
192 }
193