1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
|
/* @(#)rpc_prot.c 2.3 88/08/07 4.0 RPCSRC */
/*
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
* unrestricted use provided that this legend is included on all tape
* media and as a part of the software program in whole or part. Users
* may copy or modify Sun RPC without charge, but are not authorized
* to license or distribute it to anyone else except as part of a product or
* program developed by the user.
*
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
*
* Sun RPC is provided with no support and without any obligation on the
* part of Sun Microsystems, Inc. to assist in its use, correction,
* modification or enhancement.
*
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
* OR ANY PART THEREOF.
*
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
* or profits or other special, indirect and consequential damages, even if
* Sun has been advised of the possibility of such damages.
*
* Sun Microsystems, Inc.
* 2550 Garcia Avenue
* Mountain View, California 94043
*/
#if !defined(lint) && defined(SCCSIDS)
static char sccsid[] = "@(#)rpc_prot.c 1.36 87/08/11 Copyr 1984 Sun Micro";
#endif
/*
* rpc_prot.c
*
* Copyright (C) 1984, Sun Microsystems, Inc.
*
* This set of routines implements the rpc message definition,
* its serializer and some common rpc utility routines.
* The routines are meant for various implementations of rpc -
* they are NOT for the rpc client or rpc service implementations!
* Because authentication stuff is easy and is part of rpc, the opaque
* routines are also in this program.
*/
#include <sys/param.h>
#include <rpc/rpc.h>
/* * * * * * * * * * * * * * XDR Authentication * * * * * * * * * * * */
/*
* XDR an opaque authentication struct
* (see auth.h)
*/
bool_t
xdr_opaque_auth(xdrs, ap)
register XDR *xdrs;
register struct opaque_auth *ap;
{
if (xdr_enum(xdrs, &(ap->oa_flavor)))
return (xdr_bytes(xdrs, &ap->oa_base,
&ap->oa_length, MAX_AUTH_BYTES));
return (FALSE);
}
/*
* XDR a DES block
*/
bool_t
xdr_des_block(xdrs, blkp)
register XDR *xdrs;
register des_block *blkp;
{
return (xdr_opaque(xdrs, (caddr_t)blkp, sizeof(des_block)));
}
/* * * * * * * * * * * * * * XDR RPC MESSAGE * * * * * * * * * * * * * * * */
/*
* XDR the MSG_ACCEPTED part of a reply message union
*/
bool_t
xdr_accepted_reply(xdrs, ar)
register XDR *xdrs;
register struct accepted_reply *ar;
{
/* personalized union, rather than calling xdr_union */
if (! xdr_opaque_auth(xdrs, &(ar->ar_verf)))
return (FALSE);
if (! xdr_enum(xdrs, (enum_t *)&(ar->ar_stat)))
return (FALSE);
switch (ar->ar_stat) {
case SUCCESS:
return ((*(ar->ar_results.proc))(xdrs, ar->ar_results.where));
case PROG_MISMATCH:
if (! xdr_u_long(xdrs, &(ar->ar_vers.low)))
return (FALSE);
return (xdr_u_long(xdrs, &(ar->ar_vers.high)));
}
return (TRUE); /* TRUE => open ended set of problems */
}
/*
* XDR the MSG_DENIED part of a reply message union
*/
bool_t
xdr_rejected_reply(xdrs, rr)
register XDR *xdrs;
register struct rejected_reply *rr;
{
/* personalized union, rather than calling xdr_union */
if (! xdr_enum(xdrs, (enum_t *)&(rr->rj_stat)))
return (FALSE);
switch (rr->rj_stat) {
case RPC_MISMATCH:
if (! xdr_u_long(xdrs, &(rr->rj_vers.low)))
return (FALSE);
return (xdr_u_long(xdrs, &(rr->rj_vers.high)));
case AUTH_ERROR:
return (xdr_enum(xdrs, (enum_t *)&(rr->rj_why)));
}
return (FALSE);
}
static struct xdr_discrim reply_dscrm[3] = {
{ (int)MSG_ACCEPTED, xdr_accepted_reply },
{ (int)MSG_DENIED, xdr_rejected_reply },
{ __dontcare__, NULL_xdrproc_t } };
/*
* XDR a reply message
*/
bool_t
xdr_replymsg(xdrs, rmsg)
register XDR *xdrs;
register struct rpc_msg *rmsg;
{
if (
xdr_u_long(xdrs, &(rmsg->rm_xid)) &&
xdr_enum(xdrs, (enum_t *)&(rmsg->rm_direction)) &&
(rmsg->rm_direction == REPLY) )
return (xdr_union(xdrs, (enum_t *)&(rmsg->rm_reply.rp_stat),
(caddr_t)&(rmsg->rm_reply.ru), reply_dscrm, NULL_xdrproc_t));
return (FALSE);
}
/*
* Serializes the "static part" of a call message header.
* The fields include: rm_xid, rm_direction, rpcvers, prog, and vers.
* The rm_xid is not really static, but the user can easily munge on the fly.
*/
bool_t
xdr_callhdr(xdrs, cmsg)
register XDR *xdrs;
register struct rpc_msg *cmsg;
{
cmsg->rm_direction = CALL;
cmsg->rm_call.cb_rpcvers = RPC_MSG_VERSION;
if (
(xdrs->x_op == XDR_ENCODE) &&
xdr_u_long(xdrs, &(cmsg->rm_xid)) &&
xdr_enum(xdrs, (enum_t *)&(cmsg->rm_direction)) &&
xdr_u_long(xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
xdr_u_long(xdrs, &(cmsg->rm_call.cb_prog)) )
return (xdr_u_long(xdrs, &(cmsg->rm_call.cb_vers)));
return (FALSE);
}
/* ************************** Client utility routine ************* */
static void
accepted(acpt_stat, error)
register enum accept_stat acpt_stat;
register struct rpc_err *error;
{
switch (acpt_stat) {
case PROG_UNAVAIL:
error->re_status = RPC_PROGUNAVAIL;
return;
case PROG_MISMATCH:
error->re_status = RPC_PROGVERSMISMATCH;
return;
case PROC_UNAVAIL:
error->re_status = RPC_PROCUNAVAIL;
return;
case GARBAGE_ARGS:
error->re_status = RPC_CANTDECODEARGS;
return;
case SYSTEM_ERR:
error->re_status = RPC_SYSTEMERROR;
return;
case SUCCESS:
error->re_status = RPC_SUCCESS;
return;
}
/* something's wrong, but we don't know what ... */
error->re_status = RPC_FAILED;
error->re_lb.s1 = (long)MSG_ACCEPTED;
error->re_lb.s2 = (long)acpt_stat;
}
static void
rejected(rjct_stat, error)
register enum reject_stat rjct_stat;
register struct rpc_err *error;
{
switch (rjct_stat) {
case RPC_VERSMISMATCH:
error->re_status = RPC_VERSMISMATCH;
return;
case AUTH_ERROR:
error->re_status = RPC_AUTHERROR;
return;
}
/* something's wrong, but we don't know what ... */
error->re_status = RPC_FAILED;
error->re_lb.s1 = (long)MSG_DENIED;
error->re_lb.s2 = (long)rjct_stat;
}
/*
* given a reply message, fills in the error
*/
void
_seterr_reply(msg, error)
register struct rpc_msg *msg;
register struct rpc_err *error;
{
/* optimized for normal, SUCCESSful case */
switch (msg->rm_reply.rp_stat) {
case MSG_ACCEPTED:
if (msg->acpted_rply.ar_stat == SUCCESS) {
error->re_status = RPC_SUCCESS;
return;
};
accepted(msg->acpted_rply.ar_stat, error);
break;
case MSG_DENIED:
rejected(msg->rjcted_rply.rj_stat, error);
break;
default:
error->re_status = RPC_FAILED;
error->re_lb.s1 = (long)(msg->rm_reply.rp_stat);
break;
}
switch (error->re_status) {
case RPC_VERSMISMATCH:
error->re_vers.low = msg->rjcted_rply.rj_vers.low;
error->re_vers.high = msg->rjcted_rply.rj_vers.high;
break;
case RPC_AUTHERROR:
error->re_why = msg->rjcted_rply.rj_why;
break;
case RPC_PROGVERSMISMATCH:
error->re_vers.low = msg->acpted_rply.ar_vers.low;
error->re_vers.high = msg->acpted_rply.ar_vers.high;
break;
}
}
|
