1 /*	$NetBSD: rpc_callmsg.c,v 1.16 2000/07/14 08:40:42 fvdl Exp $	*/
2 
3 /*-
4  * Copyright (c) 2009, Sun Microsystems, Inc.
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions are met:
9  * - Redistributions of source code must retain the above copyright notice,
10  *   this list of conditions and the following disclaimer.
11  * - Redistributions in binary form must reproduce the above copyright notice,
12  *   this list of conditions and the following disclaimer in the documentation
13  *   and/or other materials provided with the distribution.
14  * - Neither the name of Sun Microsystems, Inc. nor the names of its
15  *   contributors may be used to endorse or promote products derived
16  *   from this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28  * POSSIBILITY OF SUCH DAMAGE.
29  */
30 
31 #if defined(LIBC_SCCS) && !defined(lint)
32 static char *sccsid2 = "@(#)rpc_callmsg.c 1.4 87/08/11 Copyr 1984 Sun Micro";
33 static char *sccsid = "@(#)rpc_callmsg.c	2.1 88/07/29 4.0 RPCSRC";
34 #endif
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD: stable/10/lib/libc/rpc/rpc_callmsg.c 309493 2016-12-03 18:14:29Z ngie $");
37 
38 /*
39  * rpc_callmsg.c
40  *
41  * Copyright (C) 1984, Sun Microsystems, Inc.
42  *
43  */
44 
45 #include "namespace.h"
46 #include <assert.h>
47 #include <stdlib.h>
48 #include <string.h>
49 
50 #include <rpc/rpc.h>
51 #include "un-namespace.h"
52 
53 /*
54  * XDR a call message
55  */
56 bool_t
xdr_callmsg(XDR * xdrs,struct rpc_msg * cmsg)57 xdr_callmsg(XDR *xdrs, struct rpc_msg *cmsg)
58 {
59 	enum msg_type *prm_direction;
60 	int32_t *buf;
61 	struct opaque_auth *oa;
62 
63 	assert(xdrs != NULL);
64 	assert(cmsg != NULL);
65 
66 	if (xdrs->x_op == XDR_ENCODE) {
67 		if (cmsg->rm_call.cb_cred.oa_length > MAX_AUTH_BYTES) {
68 			return (FALSE);
69 		}
70 		if (cmsg->rm_call.cb_verf.oa_length > MAX_AUTH_BYTES) {
71 			return (FALSE);
72 		}
73 		buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT
74 			+ RNDUP(cmsg->rm_call.cb_cred.oa_length)
75 			+ 2 * BYTES_PER_XDR_UNIT
76 			+ RNDUP(cmsg->rm_call.cb_verf.oa_length));
77 		if (buf != NULL) {
78 			IXDR_PUT_INT32(buf, cmsg->rm_xid);
79 			IXDR_PUT_ENUM(buf, cmsg->rm_direction);
80 			if (cmsg->rm_direction != CALL) {
81 				return (FALSE);
82 			}
83 			IXDR_PUT_INT32(buf, cmsg->rm_call.cb_rpcvers);
84 			if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION) {
85 				return (FALSE);
86 			}
87 			IXDR_PUT_INT32(buf, cmsg->rm_call.cb_prog);
88 			IXDR_PUT_INT32(buf, cmsg->rm_call.cb_vers);
89 			IXDR_PUT_INT32(buf, cmsg->rm_call.cb_proc);
90 			oa = &cmsg->rm_call.cb_cred;
91 			IXDR_PUT_ENUM(buf, oa->oa_flavor);
92 			IXDR_PUT_INT32(buf, oa->oa_length);
93 			if (oa->oa_length) {
94 				memmove(buf, oa->oa_base, oa->oa_length);
95 				buf += RNDUP(oa->oa_length) / sizeof (int32_t);
96 			}
97 			oa = &cmsg->rm_call.cb_verf;
98 			IXDR_PUT_ENUM(buf, oa->oa_flavor);
99 			IXDR_PUT_INT32(buf, oa->oa_length);
100 			if (oa->oa_length) {
101 				memmove(buf, oa->oa_base, oa->oa_length);
102 				/* no real need....
103 				buf += RNDUP(oa->oa_length) / sizeof (int32_t);
104 				*/
105 			}
106 			return (TRUE);
107 		}
108 	}
109 	if (xdrs->x_op == XDR_DECODE) {
110 		buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT);
111 		if (buf != NULL) {
112 			cmsg->rm_xid = IXDR_GET_U_INT32(buf);
113 			cmsg->rm_direction = IXDR_GET_ENUM(buf, enum msg_type);
114 			if (cmsg->rm_direction != CALL) {
115 				return (FALSE);
116 			}
117 			cmsg->rm_call.cb_rpcvers = IXDR_GET_U_INT32(buf);
118 			if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION) {
119 				return (FALSE);
120 			}
121 			cmsg->rm_call.cb_prog = IXDR_GET_U_INT32(buf);
122 			cmsg->rm_call.cb_vers = IXDR_GET_U_INT32(buf);
123 			cmsg->rm_call.cb_proc = IXDR_GET_U_INT32(buf);
124 			oa = &cmsg->rm_call.cb_cred;
125 			oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
126 			oa->oa_length = (u_int)IXDR_GET_U_INT32(buf);
127 			if (oa->oa_length) {
128 				if (oa->oa_length > MAX_AUTH_BYTES) {
129 					return (FALSE);
130 				}
131 				if (oa->oa_base == NULL) {
132 					oa->oa_base = (caddr_t)
133 					    mem_alloc(oa->oa_length);
134 					if (oa->oa_base == NULL)
135 						return (FALSE);
136 				}
137 				buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
138 				if (buf == NULL) {
139 					if (xdr_opaque(xdrs, oa->oa_base,
140 					    oa->oa_length) == FALSE) {
141 						return (FALSE);
142 					}
143 				} else {
144 					memmove(oa->oa_base, buf,
145 					    oa->oa_length);
146 					/* no real need....
147 					buf += RNDUP(oa->oa_length) /
148 						sizeof (int32_t);
149 					*/
150 				}
151 			}
152 			oa = &cmsg->rm_call.cb_verf;
153 			buf = XDR_INLINE(xdrs, 2 * BYTES_PER_XDR_UNIT);
154 			if (buf == NULL) {
155 				if (xdr_enum(xdrs, &oa->oa_flavor) == FALSE ||
156 				    xdr_u_int(xdrs, &oa->oa_length) == FALSE) {
157 					return (FALSE);
158 				}
159 			} else {
160 				oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
161 				oa->oa_length = (u_int)IXDR_GET_U_INT32(buf);
162 			}
163 			if (oa->oa_length) {
164 				if (oa->oa_length > MAX_AUTH_BYTES) {
165 					return (FALSE);
166 				}
167 				if (oa->oa_base == NULL) {
168 					oa->oa_base = (caddr_t)
169 					    mem_alloc(oa->oa_length);
170 					if (oa->oa_base == NULL)
171 						return (FALSE);
172 				}
173 				buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
174 				if (buf == NULL) {
175 					if (xdr_opaque(xdrs, oa->oa_base,
176 					    oa->oa_length) == FALSE) {
177 						return (FALSE);
178 					}
179 				} else {
180 					memmove(oa->oa_base, buf,
181 					    oa->oa_length);
182 					/* no real need...
183 					buf += RNDUP(oa->oa_length) /
184 						sizeof (int32_t);
185 					*/
186 				}
187 			}
188 			return (TRUE);
189 		}
190 	}
191 	prm_direction = &cmsg->rm_direction;
192 	if (
193 	    xdr_u_int32_t(xdrs, &(cmsg->rm_xid)) &&
194 	    xdr_enum(xdrs, (enum_t *) prm_direction) &&
195 	    (cmsg->rm_direction == CALL) &&
196 	    xdr_rpcvers(xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
197 	    (cmsg->rm_call.cb_rpcvers == RPC_MSG_VERSION) &&
198 	    xdr_rpcprog(xdrs, &(cmsg->rm_call.cb_prog)) &&
199 	    xdr_rpcvers(xdrs, &(cmsg->rm_call.cb_vers)) &&
200 	    xdr_rpcproc(xdrs, &(cmsg->rm_call.cb_proc)) &&
201 	    xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_cred)) )
202 		return (xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_verf)));
203 	return (FALSE);
204 }
205