misc_rpc.c revision 38494 
1/*
2 * Copyright (c) 1997-1998 Erez Zadok
3 * Copyright (c) 1990 Jan-Simon Pendry
4 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
5 * Copyright (c) 1990 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Jan-Simon Pendry at Imperial College, London.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 *    must display the following acknowledgement:
21 *      This product includes software developed by the University of
22 *      California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 *    may be used to endorse or promote products derived from this software
25 *    without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 *
39 *      %W% (Berkeley) %G%
40 *
41 * $Id: misc_rpc.c,v 5.2.2.1 1992/02/09 15:08:40 jsp beta $
42 *
43 */
44
45/*
46 * Additions to Sun RPC.
47 */
48
49#ifdef HAVE_CONFIG_H
50# include <config.h>
51#endif /* HAVE_CONFIG_H */
52#include <am_defs.h>
53#include <amu.h>
54
55/*
56 * Some systems renamed _seterr_reply to __seterr_reply (with two
57 * leading underscores)
58 */
59#if !defined(HAVE__SETERR_REPLY) && defined(HAVE___SETERR_REPLY)
60# define _seterr_reply	__seterr_reply
61#endif /* !defined(HAVE__SETERR_REPLY) && defined(HAVE___SETERR_REPLY) */
62
63
64void
65rpc_msg_init(struct rpc_msg *mp, u_long prog, u_long vers, u_long proc)
66{
67  /*
68   * Initialise the message
69   */
70  memset((voidp) mp, 0, sizeof(*mp));
71  mp->rm_xid = 0;
72  mp->rm_direction = CALL;
73  mp->rm_call.cb_rpcvers = RPC_MSG_VERSION;
74  mp->rm_call.cb_prog = prog;
75  mp->rm_call.cb_vers = vers;
76  mp->rm_call.cb_proc = proc;
77}
78
79
80/*
81 * Field reply to call to mountd
82 */
83int
84pickup_rpc_reply(voidp pkt, int len, voidp where, XDRPROC_T_TYPE where_xdr)
85{
86  XDR reply_xdr;
87  int ok;
88  struct rpc_err err;
89  struct rpc_msg reply_msg;
90  int error = 0;
91
92  /* memset((voidp) &err, 0, sizeof(err)); */
93  memset((voidp) &reply_msg, 0, sizeof(reply_msg));
94  memset((voidp) &reply_xdr, 0, sizeof(reply_xdr));
95
96  reply_msg.acpted_rply.ar_results.where = (caddr_t) where;
97  reply_msg.acpted_rply.ar_results.proc = where_xdr;
98
99  xdrmem_create(&reply_xdr, pkt, len, XDR_DECODE);
100
101  ok = xdr_replymsg(&reply_xdr, &reply_msg);
102  if (!ok) {
103    error = EIO;
104    goto drop;
105  }
106  _seterr_reply(&reply_msg, &err);
107  if (err.re_status != RPC_SUCCESS) {
108    error = EIO;
109    goto drop;
110  }
111
112drop:
113  if (reply_msg.rm_reply.rp_stat == MSG_ACCEPTED &&
114      reply_msg.acpted_rply.ar_verf.oa_base) {
115    reply_xdr.x_op = XDR_FREE;
116    (void) xdr_opaque_auth(&reply_xdr,
117			   &reply_msg.acpted_rply.ar_verf);
118  }
119  xdr_destroy(&reply_xdr);
120
121  return error;
122}
123
124
125int
126make_rpc_packet(char *buf, int buflen, u_long proc, struct rpc_msg *mp, voidp arg, XDRPROC_T_TYPE arg_xdr, AUTH *auth)
127{
128  XDR msg_xdr;
129  int len;
130
131  xdrmem_create(&msg_xdr, buf, buflen, XDR_ENCODE);
132
133  /*
134   * Basic protocol header
135   */
136  if (!xdr_callhdr(&msg_xdr, mp))
137    return -EIO;
138
139  /*
140   * Called procedure number
141   */
142  if (!xdr_enum(&msg_xdr, (enum_t *) & proc))
143    return -EIO;
144
145  /*
146   * Authorization
147   */
148  if (!AUTH_MARSHALL(auth, &msg_xdr))
149    return -EIO;
150
151  /*
152   * Arguments
153   */
154  if (!(*arg_xdr) (&msg_xdr, arg))
155    return -EIO;
156
157  /*
158   * Determine length
159   */
160  len = xdr_getpos(&msg_xdr);
161
162  /*
163   * Throw away xdr
164   */
165  xdr_destroy(&msg_xdr);
166
167  return len;
168}
169