1 /* $NetBSD: rpcb_prot.c,v 1.11 2013/03/11 20:19:29 tron Exp $ */
2
3 /*
4 * Copyright (c) 2010, Oracle America, Inc.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met:
9 *
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * * Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials
15 * provided with the distribution.
16 * * Neither the name of the "Oracle America, Inc." nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33 /*
34 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
35 */
36
37 /* #ident "@(#)rpcb_prot.c 1.13 94/04/24 SMI" */
38
39 #include <sys/cdefs.h>
40 #if defined(LIBC_SCCS) && !defined(lint)
41 #if 0
42 static char sccsid[] = "@(#)rpcb_prot.c 1.9 89/04/21 Copyr 1984 Sun Micro";
43 #else
44 __RCSID("$NetBSD: rpcb_prot.c,v 1.11 2013/03/11 20:19:29 tron Exp $");
45 #endif
46 #endif
47
48 /*
49 * rpcb_prot.c
50 * XDR routines for the rpcbinder version 3.
51 *
52 * Copyright (C) 1984, 1988, Sun Microsystems, Inc.
53 */
54
55 #include "namespace.h"
56
57 #include <rpc/rpc.h>
58 #include <rpc/types.h>
59 #include <rpc/xdr.h>
60 #include <rpc/rpcb_prot.h>
61
62 #include <assert.h>
63
64 #ifdef __weak_alias
__weak_alias(xdr_rpcb,_xdr_rpcb)65 __weak_alias(xdr_rpcb,_xdr_rpcb)
66 __weak_alias(xdr_rpcblist_ptr,_xdr_rpcblist_ptr)
67 __weak_alias(xdr_rpcblist,_xdr_rpcblist)
68 __weak_alias(xdr_rpcb_entry,_xdr_rpcb_entry)
69 __weak_alias(xdr_rpcb_entry_list_ptr,_xdr_rpcb_entry_list_ptr)
70 __weak_alias(xdr_rpcb_rmtcallargs,_xdr_rpcb_rmtcallargs)
71 __weak_alias(xdr_rpcb_rmtcallres,_xdr_rpcb_rmtcallres)
72 __weak_alias(xdr_netbuf,_xdr_netbuf)
73 #endif
74
75
76 bool_t
77 xdr_rpcb(XDR *xdrs, RPCB *objp)
78 {
79
80 _DIAGASSERT(objp != NULL);
81
82 if (!xdr_u_int32_t(xdrs, &objp->r_prog)) {
83 return (FALSE);
84 }
85 if (!xdr_u_int32_t(xdrs, &objp->r_vers)) {
86 return (FALSE);
87 }
88 if (!xdr_string(xdrs, &objp->r_netid, (u_int)~0)) {
89 return (FALSE);
90 }
91 if (!xdr_string(xdrs, &objp->r_addr, (u_int)~0)) {
92 return (FALSE);
93 }
94 if (!xdr_string(xdrs, &objp->r_owner, (u_int)~0)) {
95 return (FALSE);
96 }
97 return (TRUE);
98 }
99
100 /*
101 * rpcblist_ptr implements a linked list. The RPCL definition from
102 * rpcb_prot.x is:
103 *
104 * struct rpcblist {
105 * rpcb rpcb_map;
106 * struct rpcblist *rpcb_next;
107 * };
108 * typedef rpcblist *rpcblist_ptr;
109 *
110 * Recall that "pointers" in XDR are encoded as a boolean, indicating whether
111 * there's any data behind the pointer, followed by the data (if any exists).
112 * The boolean can be interpreted as ``more data follows me''; if FALSE then
113 * nothing follows the boolean; if TRUE then the boolean is followed by an
114 * actual struct rpcb, and another rpcblist_ptr (declared in RPCL as "struct
115 * rpcblist *").
116 *
117 * This could be implemented via the xdr_pointer type, though this would
118 * result in one recursive call per element in the list. Rather than do that
119 * we can ``unwind'' the recursion into a while loop and use xdr_reference to
120 * serialize the rpcb elements.
121 */
122
123 bool_t
xdr_rpcblist_ptr(XDR * xdrs,rpcblist_ptr * rp)124 xdr_rpcblist_ptr(XDR *xdrs, rpcblist_ptr *rp)
125 {
126 /*
127 * more_elements is pre-computed in case the direction is
128 * XDR_ENCODE or XDR_FREE. more_elements is overwritten by
129 * xdr_bool when the direction is XDR_DECODE.
130 */
131 bool_t more_elements;
132 int freeing;
133 rpcblist_ptr next;
134 rpcblist_ptr next_copy;
135
136 _DIAGASSERT(xdrs != NULL);
137 /* XXX: rp may be NULL ??? */
138
139 freeing = (xdrs->x_op == XDR_FREE);
140 next = NULL;
141
142 for (;;) {
143 more_elements = (bool_t)(*rp != NULL);
144 if (! xdr_bool(xdrs, &more_elements)) {
145 return (FALSE);
146 }
147 if (! more_elements) {
148 return (TRUE); /* we are done */
149 }
150 /*
151 * the unfortunate side effect of non-recursion is that in
152 * the case of freeing we must remember the next object
153 * before we free the current object ...
154 */
155 if (freeing && *rp)
156 next = (*rp)->rpcb_next;
157 if (! xdr_reference(xdrs, (caddr_t *)rp,
158 (u_int)sizeof (rpcblist), (xdrproc_t)xdr_rpcb)) {
159 return (FALSE);
160 }
161 if (freeing) {
162 next_copy = next;
163 rp = &next_copy;
164 /*
165 * Note that in the subsequent iteration, next_copy
166 * gets nulled out by the xdr_reference
167 * but next itself survives.
168 */
169 } else if (*rp) {
170 rp = &((*rp)->rpcb_next);
171 }
172 }
173 /*NOTREACHED*/
174 }
175
176 /*
177 * xdr_rpcblist() is specified to take a RPCBLIST **, but is identical in
178 * functionality to xdr_rpcblist_ptr().
179 */
180 bool_t
xdr_rpcblist(XDR * xdrs,RPCBLIST ** rp)181 xdr_rpcblist(XDR *xdrs, RPCBLIST **rp)
182 {
183 bool_t dummy;
184
185 dummy = xdr_rpcblist_ptr(xdrs, (rpcblist_ptr *)rp);
186 return (dummy);
187 }
188
189
190 bool_t
xdr_rpcb_entry(XDR * xdrs,rpcb_entry * objp)191 xdr_rpcb_entry(XDR *xdrs, rpcb_entry *objp)
192 {
193
194 _DIAGASSERT(objp != NULL);
195
196 if (!xdr_string(xdrs, &objp->r_maddr, (u_int)~0)) {
197 return (FALSE);
198 }
199 if (!xdr_string(xdrs, &objp->r_nc_netid, (u_int)~0)) {
200 return (FALSE);
201 }
202 if (!xdr_u_int32_t(xdrs, &objp->r_nc_semantics)) {
203 return (FALSE);
204 }
205 if (!xdr_string(xdrs, &objp->r_nc_protofmly, (u_int)~0)) {
206 return (FALSE);
207 }
208 if (!xdr_string(xdrs, &objp->r_nc_proto, (u_int)~0)) {
209 return (FALSE);
210 }
211 return (TRUE);
212 }
213
214 bool_t
xdr_rpcb_entry_list_ptr(XDR * xdrs,rpcb_entry_list_ptr * rp)215 xdr_rpcb_entry_list_ptr(XDR *xdrs, rpcb_entry_list_ptr *rp)
216 {
217 /*
218 * more_elements is pre-computed in case the direction is
219 * XDR_ENCODE or XDR_FREE. more_elements is overwritten by
220 * xdr_bool when the direction is XDR_DECODE.
221 */
222 bool_t more_elements;
223 int freeing;
224 rpcb_entry_list_ptr next;
225 rpcb_entry_list_ptr next_copy;
226
227 _DIAGASSERT(xdrs != NULL);
228 /* XXX: rp is allowed to be NULL ??? */
229
230 freeing = (xdrs->x_op == XDR_FREE);
231 next = NULL;
232
233 for (;;) {
234 more_elements = (bool_t)(*rp != NULL);
235 if (! xdr_bool(xdrs, &more_elements)) {
236 return (FALSE);
237 }
238 if (! more_elements) {
239 return (TRUE); /* we are done */
240 }
241 /*
242 * the unfortunate side effect of non-recursion is that in
243 * the case of freeing we must remember the next object
244 * before we free the current object ...
245 */
246 if (freeing && *rp)
247 next = (*rp)->rpcb_entry_next;
248 if (! xdr_reference(xdrs, (caddr_t *)rp,
249 (u_int)sizeof (rpcb_entry_list),
250 (xdrproc_t)xdr_rpcb_entry)) {
251 return (FALSE);
252 }
253 if (freeing) {
254 next_copy = next;
255 rp = &next_copy;
256 /*
257 * Note that in the subsequent iteration, next_copy
258 * gets nulled out by the xdr_reference
259 * but next itself survives.
260 */
261 } else if (*rp) {
262 rp = &((*rp)->rpcb_entry_next);
263 }
264 }
265 /*NOTREACHED*/
266 }
267
268 /*
269 * XDR remote call arguments
270 * written for XDR_ENCODE direction only
271 */
272 bool_t
xdr_rpcb_rmtcallargs(XDR * xdrs,struct rpcb_rmtcallargs * p)273 xdr_rpcb_rmtcallargs(XDR *xdrs, struct rpcb_rmtcallargs *p)
274 {
275 struct r_rpcb_rmtcallargs *objp =
276 (struct r_rpcb_rmtcallargs *)(void *)p;
277 u_int lenposition, argposition, position;
278 int32_t *buf;
279
280 _DIAGASSERT(p != NULL);
281
282 buf = XDR_INLINE(xdrs, 3 * BYTES_PER_XDR_UNIT);
283 if (buf == NULL) {
284 if (!xdr_u_int32_t(xdrs, &objp->prog)) {
285 return (FALSE);
286 }
287 if (!xdr_u_int32_t(xdrs, &objp->vers)) {
288 return (FALSE);
289 }
290 if (!xdr_u_int32_t(xdrs, &objp->proc)) {
291 return (FALSE);
292 }
293 } else {
294 IXDR_PUT_U_INT32(buf, objp->prog);
295 IXDR_PUT_U_INT32(buf, objp->vers);
296 IXDR_PUT_U_INT32(buf, objp->proc);
297 }
298
299 /*
300 * All the jugglery for just getting the size of the arguments
301 */
302 lenposition = XDR_GETPOS(xdrs);
303 if (! xdr_u_int(xdrs, &(objp->args.args_len))) {
304 return (FALSE);
305 }
306 argposition = XDR_GETPOS(xdrs);
307 if (! (*objp->xdr_args)(xdrs, objp->args.args_val)) {
308 return (FALSE);
309 }
310 position = XDR_GETPOS(xdrs);
311 objp->args.args_len = (u_int)((u_long)position - (u_long)argposition);
312 XDR_SETPOS(xdrs, lenposition);
313 if (! xdr_u_int(xdrs, &(objp->args.args_len))) {
314 return (FALSE);
315 }
316 XDR_SETPOS(xdrs, position);
317 return (TRUE);
318 }
319
320 /*
321 * XDR remote call results
322 * written for XDR_DECODE direction only
323 */
324 bool_t
xdr_rpcb_rmtcallres(XDR * xdrs,struct rpcb_rmtcallres * p)325 xdr_rpcb_rmtcallres(XDR *xdrs, struct rpcb_rmtcallres *p)
326 {
327 bool_t dummy;
328 struct r_rpcb_rmtcallres *objp = (struct r_rpcb_rmtcallres *)(void *)p;
329
330 _DIAGASSERT(p != NULL);
331
332 if (!xdr_string(xdrs, &objp->addr, (u_int)~0)) {
333 return (FALSE);
334 }
335 if (!xdr_u_int(xdrs, &objp->results.results_len)) {
336 return (FALSE);
337 }
338 dummy = (*(objp->xdr_res))(xdrs, objp->results.results_val);
339 return (dummy);
340 }
341
342 bool_t
xdr_netbuf(XDR * xdrs,struct netbuf * objp)343 xdr_netbuf(XDR *xdrs, struct netbuf *objp)
344 {
345 bool_t dummy;
346
347 _DIAGASSERT(objp != NULL);
348
349 if (!xdr_u_int32_t(xdrs, (u_int32_t *) &objp->maxlen)) {
350 return (FALSE);
351 }
352 dummy = xdr_bytes(xdrs, (char **)(void *)&(objp->buf),
353 (u_int *)&(objp->len), objp->maxlen);
354 return (dummy);
355 }
356