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763cd6e3 RS |
1 | /* |
2 | Copyright (C) 2012 by Ronnie Sahlberg <ronniesahlberg@gmail.com> | |
3 | ||
4 | This program is free software; you can redistribute it and/or modify | |
5 | it under the terms of the GNU Lesser General Public License as published by | |
6 | the Free Software Foundation; either version 2.1 of the License, or | |
7 | (at your option) any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public License | |
15 | along with this program; if not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | /* | |
18 | * This file contains definitions for the built in ZDR implementation. | |
19 | * This is a very limited ZDR subset that can only marshal to/from a momory buffer, | |
20 | * i.e. zdrmem_create() buffers. | |
21 | * It aims to be compatible with normal rpcgen generated functions. | |
22 | */ | |
b1406276 RS |
23 | #ifdef WIN32 |
24 | #include "win32_compat.h" | |
833d5b9d | 25 | #endif |
763cd6e3 RS |
26 | |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
b1406276 | 29 | #include <time.h> |
763cd6e3 RS |
30 | #include "libnfs-zdr.h" |
31 | ||
32 | struct opaque_auth _null_auth; | |
33 | ||
34 | bool_t libnfs_zdr_setpos(ZDR *zdrs, uint32_t pos) | |
35 | { | |
36 | zdrs->pos = pos; | |
242b81cf RS |
37 | |
38 | return TRUE; | |
763cd6e3 RS |
39 | } |
40 | ||
41 | uint32_t libnfs_zdr_getpos(ZDR *zdrs) | |
42 | { | |
43 | return zdrs->pos; | |
44 | } | |
45 | ||
46 | void libnfs_zdrmem_create(ZDR *zdrs, const caddr_t addr, uint32_t size, enum zdr_op xop) | |
47 | { | |
48 | zdrs->x_op = xop; | |
49 | zdrs->buf = addr; | |
50 | zdrs->size = size; | |
51 | zdrs->pos = 0; | |
52 | zdrs->mem = NULL; | |
53 | } | |
54 | ||
55 | static void *zdr_malloc(ZDR *zdrs, uint32_t size) | |
56 | { | |
57 | struct zdr_mem *mem; | |
58 | ||
59 | mem = malloc(sizeof(struct zdr_mem)); | |
60 | mem->next = zdrs->mem; | |
61 | mem->size = size; | |
62 | mem->buf = malloc(mem->size); | |
63 | zdrs->mem = mem; | |
64 | ||
65 | return mem->buf; | |
66 | } | |
67 | ||
68 | void libnfs_zdr_destroy(ZDR *zdrs) | |
69 | { | |
70 | while (zdrs->mem != NULL) { | |
71 | struct zdr_mem *mem = zdrs->mem->next; | |
72 | free(zdrs->mem->buf); | |
73 | free(zdrs->mem); | |
74 | zdrs->mem = mem; | |
75 | } | |
76 | } | |
77 | ||
78 | bool_t libnfs_zdr_u_int(ZDR *zdrs, uint32_t *u) | |
79 | { | |
80 | if (zdrs->pos + 4 > zdrs->size) { | |
81 | return FALSE; | |
82 | } | |
83 | ||
84 | switch (zdrs->x_op) { | |
85 | case ZDR_ENCODE: | |
86 | *(uint32_t *)&zdrs->buf[zdrs->pos] = htonl(*u); | |
87 | zdrs->pos += 4; | |
88 | return TRUE; | |
89 | break; | |
90 | case ZDR_DECODE: | |
91 | *u = ntohl(*(uint32_t *)&zdrs->buf[zdrs->pos]); | |
92 | zdrs->pos += 4; | |
93 | return TRUE; | |
94 | break; | |
95 | } | |
96 | ||
97 | return FALSE; | |
98 | } | |
99 | ||
100 | bool_t libnfs_zdr_int(ZDR *zdrs, int32_t *i) | |
101 | { | |
102 | return libnfs_zdr_u_int(zdrs, (uint32_t *)i); | |
103 | } | |
104 | ||
105 | bool_t libnfs_zdr_u_quad_t(ZDR *zdrs, uint64_t *u) | |
106 | { | |
107 | if (zdrs->pos + 8 > zdrs->size) { | |
108 | return FALSE; | |
109 | } | |
110 | ||
111 | switch (zdrs->x_op) { | |
112 | case ZDR_ENCODE: | |
113 | *(uint32_t *)&zdrs->buf[zdrs->pos] = htonl((*u >> 32)); | |
114 | zdrs->pos += 4; | |
115 | *(uint32_t *)&zdrs->buf[zdrs->pos] = htonl((*u & 0xffffffff)); | |
116 | zdrs->pos += 4; | |
117 | return TRUE; | |
118 | break; | |
119 | case ZDR_DECODE: | |
120 | *u = ntohl(*(uint32_t *)&zdrs->buf[zdrs->pos]); | |
121 | zdrs->pos += 4; | |
122 | *u <<= 32; | |
123 | *u |= ntohl(*(uint32_t *)&zdrs->buf[zdrs->pos]); | |
124 | zdrs->pos += 4; | |
125 | return TRUE; | |
126 | break; | |
127 | } | |
128 | ||
129 | return FALSE; | |
130 | } | |
131 | ||
132 | bool_t libnfs_zdr_quad_t(ZDR *zdrs, int64_t *i) | |
133 | { | |
134 | return libnfs_zdr_u_quad_t(zdrs, (uint64_t *)i); | |
135 | } | |
136 | ||
137 | bool_t libnfs_zdr_bytes(ZDR *zdrs, char **bufp, uint32_t *size, uint32_t maxsize) | |
138 | { | |
139 | if (!libnfs_zdr_u_int(zdrs, size)) { | |
140 | return FALSE; | |
141 | } | |
142 | ||
143 | if (zdrs->pos + *size > zdrs->size) { | |
144 | return FALSE; | |
145 | } | |
146 | ||
147 | switch (zdrs->x_op) { | |
148 | case ZDR_ENCODE: | |
149 | memcpy(&zdrs->buf[zdrs->pos], *bufp, *size); | |
150 | zdrs->pos += *size; | |
151 | zdrs->pos = (zdrs->pos + 3) & ~3; | |
152 | return TRUE; | |
153 | case ZDR_DECODE: | |
154 | if (*bufp == NULL) { | |
155 | *bufp = zdr_malloc(zdrs, *size); | |
156 | } | |
157 | memcpy(*bufp, &zdrs->buf[zdrs->pos], *size); | |
158 | zdrs->pos += *size; | |
159 | zdrs->pos = (zdrs->pos + 3) & ~3; | |
160 | return TRUE; | |
161 | } | |
162 | ||
163 | return FALSE; | |
164 | } | |
165 | ||
166 | ||
442b829a | 167 | bool_t libnfs_zdr_enum(ZDR *zdrs, enum_t *e) |
763cd6e3 | 168 | { |
442b829a RS |
169 | bool_t ret; |
170 | int32_t i = *e; | |
171 | ||
172 | ret = libnfs_zdr_u_int(zdrs, (uint32_t *)&i); | |
173 | *e = i; | |
174 | ||
175 | return ret; | |
763cd6e3 RS |
176 | } |
177 | ||
178 | bool_t libnfs_zdr_bool(ZDR *zdrs, bool_t *b) | |
179 | { | |
180 | return libnfs_zdr_u_int(zdrs, (uint32_t *)b); | |
181 | } | |
182 | ||
183 | bool_t libnfs_zdr_void(void) | |
184 | { | |
185 | return TRUE; | |
186 | } | |
187 | ||
188 | bool_t libnfs_zdr_pointer(ZDR *zdrs, char **objp, uint32_t size, zdrproc_t proc) | |
189 | { | |
190 | bool_t more_data; | |
191 | ||
192 | more_data = (*objp != NULL); | |
193 | ||
194 | if (!libnfs_zdr_bool(zdrs, &more_data)) { | |
195 | return FALSE; | |
196 | } | |
197 | if (more_data == 0) { | |
198 | *objp = NULL; | |
199 | return TRUE; | |
200 | } | |
201 | ||
202 | if (zdrs->x_op == ZDR_DECODE) { | |
203 | *objp = zdr_malloc(zdrs, size); | |
204 | if (*objp == NULL) { | |
205 | return FALSE; | |
206 | } | |
207 | memset(*objp, 0, size); | |
208 | } | |
209 | return proc(zdrs, *objp); | |
210 | } | |
211 | ||
212 | bool_t libnfs_zdr_opaque(ZDR *zdrs, char *objp, uint32_t size) | |
213 | { | |
214 | switch (zdrs->x_op) { | |
215 | case ZDR_ENCODE: | |
216 | memcpy(&zdrs->buf[zdrs->pos], objp, size); | |
217 | zdrs->pos += size; | |
218 | zdrs->pos = (zdrs->pos + 3) & ~3; | |
219 | return TRUE; | |
220 | case ZDR_DECODE: | |
221 | memcpy(objp, &zdrs->buf[zdrs->pos], size); | |
222 | zdrs->pos += size; | |
223 | zdrs->pos = (zdrs->pos + 3) & ~3; | |
224 | return TRUE; | |
225 | } | |
226 | ||
227 | return FALSE; | |
228 | } | |
229 | ||
230 | bool_t libnfs_zdr_string(ZDR *zdrs, char **strp, uint32_t maxsize) | |
231 | { | |
232 | uint32_t size; | |
233 | ||
234 | if (zdrs->x_op == ZDR_ENCODE) { | |
235 | size = strlen(*strp); | |
236 | } | |
237 | ||
238 | if (!libnfs_zdr_u_int(zdrs, &size)) { | |
239 | return FALSE; | |
240 | } | |
241 | ||
242 | if (zdrs->pos + size > zdrs->size) { | |
243 | return FALSE; | |
244 | } | |
245 | ||
246 | switch (zdrs->x_op) { | |
247 | case ZDR_ENCODE: | |
248 | return libnfs_zdr_opaque(zdrs, *strp, size); | |
249 | case ZDR_DECODE: | |
250 | *strp = zdr_malloc(zdrs, size + 1); | |
251 | if (*strp == NULL) { | |
252 | return FALSE; | |
253 | } | |
254 | (*strp)[size] = 0; | |
255 | return libnfs_zdr_opaque(zdrs, *strp, size); | |
256 | } | |
257 | ||
258 | return FALSE; | |
259 | } | |
260 | ||
261 | bool_t libnfs_zdr_array(ZDR *zdrs, char **arrp, uint32_t *size, uint32_t maxsize, uint32_t elsize, zdrproc_t proc) | |
262 | { | |
263 | int i; | |
264 | ||
265 | if (!libnfs_zdr_u_int(zdrs, size)) { | |
266 | return FALSE; | |
267 | } | |
268 | ||
269 | if (zdrs->pos + *size * elsize > zdrs->size) { | |
270 | return FALSE; | |
271 | } | |
272 | ||
273 | if (zdrs->x_op == ZDR_DECODE) { | |
274 | *arrp = zdr_malloc(zdrs, *size * elsize); | |
275 | if (*arrp == NULL) { | |
276 | return FALSE; | |
277 | } | |
278 | memset(*arrp, 0, *size * elsize); | |
279 | } | |
280 | ||
281 | for (i = 0; i < *size; i++) { | |
5f08d03e | 282 | if (!proc(zdrs, *arrp + i * elsize)) { |
763cd6e3 RS |
283 | return FALSE; |
284 | } | |
285 | } | |
286 | return TRUE; | |
287 | } | |
288 | ||
289 | void libnfs_zdr_free(zdrproc_t proc, char *objp) | |
290 | { | |
291 | } | |
292 | ||
293 | static bool_t libnfs_opaque_auth(ZDR *zdrs, struct opaque_auth *auth) | |
294 | { | |
295 | if (!libnfs_zdr_u_int(zdrs, &auth->oa_flavor)) { | |
296 | return FALSE; | |
297 | } | |
298 | ||
020f1728 | 299 | if (!libnfs_zdr_bytes(zdrs, &auth->oa_base, &auth->oa_length, auth->oa_length)) { |
763cd6e3 RS |
300 | return FALSE; |
301 | } | |
302 | ||
303 | return TRUE; | |
304 | } | |
305 | ||
306 | static bool_t libnfs_rpc_call_body(ZDR *zdrs, struct call_body *cmb) | |
307 | { | |
aab6538b | 308 | if (!libnfs_zdr_u_int(zdrs, &cmb->rpcvers)) { |
763cd6e3 RS |
309 | return FALSE; |
310 | } | |
311 | ||
aab6538b | 312 | if (!libnfs_zdr_u_int(zdrs, &cmb->prog)) { |
763cd6e3 RS |
313 | return FALSE; |
314 | } | |
315 | ||
aab6538b | 316 | if (!libnfs_zdr_u_int(zdrs, &cmb->vers)) { |
763cd6e3 RS |
317 | return FALSE; |
318 | } | |
319 | ||
aab6538b | 320 | if (!libnfs_zdr_u_int(zdrs, &cmb->proc)) { |
763cd6e3 RS |
321 | return FALSE; |
322 | } | |
323 | ||
aab6538b | 324 | if (!libnfs_opaque_auth(zdrs, &cmb->cred)) { |
763cd6e3 RS |
325 | return FALSE; |
326 | } | |
327 | ||
aab6538b | 328 | if (!libnfs_opaque_auth(zdrs, &cmb->verf)) { |
763cd6e3 RS |
329 | return FALSE; |
330 | } | |
10a0ceaa RS |
331 | |
332 | return TRUE; | |
763cd6e3 RS |
333 | } |
334 | ||
335 | static bool_t libnfs_accepted_reply(ZDR *zdrs, struct accepted_reply *ar) | |
336 | { | |
aab6538b | 337 | if (!libnfs_opaque_auth(zdrs, &ar->verf)) { |
763cd6e3 RS |
338 | return FALSE; |
339 | } | |
340 | ||
aab6538b | 341 | if (!libnfs_zdr_u_int(zdrs, &ar->stat)) { |
763cd6e3 RS |
342 | return FALSE; |
343 | } | |
344 | ||
aab6538b | 345 | switch (ar->stat) { |
763cd6e3 | 346 | case SUCCESS: |
aab6538b | 347 | if (!ar->reply_data.results.proc(zdrs, ar->reply_data.results.where)) { |
763cd6e3 RS |
348 | return FALSE; |
349 | } | |
350 | return TRUE; | |
351 | case PROG_MISMATCH: | |
aab6538b | 352 | if (!libnfs_zdr_u_int(zdrs, &ar->reply_data.mismatch_info.low)) { |
763cd6e3 RS |
353 | return FALSE; |
354 | } | |
aab6538b | 355 | if (!libnfs_zdr_u_int(zdrs, &ar->reply_data.mismatch_info.high)) { |
763cd6e3 RS |
356 | return FALSE; |
357 | } | |
358 | return TRUE; | |
359 | default: | |
360 | return TRUE; | |
361 | } | |
362 | ||
363 | return FALSE; | |
364 | } | |
365 | ||
aab6538b | 366 | static bool_t libnfs_rejected_reply(ZDR *zdrs, struct rejected_reply *rr) |
763cd6e3 | 367 | { |
aab6538b RS |
368 | if (!libnfs_zdr_u_int(zdrs, &rr->stat)) { |
369 | return FALSE; | |
370 | } | |
371 | ||
372 | switch (rr->stat) { | |
373 | case RPC_MISMATCH: | |
374 | if (!libnfs_zdr_u_int(zdrs, &rr->reject_data.mismatch_info.low)) { | |
375 | return FALSE; | |
376 | } | |
377 | if (!libnfs_zdr_u_int(zdrs, &rr->reject_data.mismatch_info.high)) { | |
378 | return FALSE; | |
379 | } | |
380 | return TRUE; | |
381 | case AUTH_ERROR: | |
382 | if (!libnfs_zdr_u_int(zdrs, &rr->reject_data.stat)) { | |
383 | return FALSE; | |
384 | } | |
385 | return TRUE; | |
386 | default: | |
387 | return TRUE; | |
388 | } | |
389 | ||
390 | return FALSE; | |
763cd6e3 RS |
391 | } |
392 | ||
393 | static bool_t libnfs_rpc_reply_body(ZDR *zdrs, struct reply_body *rmb) | |
394 | { | |
aab6538b | 395 | if (!libnfs_zdr_u_int(zdrs, &rmb->stat)) { |
763cd6e3 RS |
396 | return FALSE; |
397 | } | |
398 | ||
aab6538b | 399 | switch (rmb->stat) { |
763cd6e3 | 400 | case MSG_ACCEPTED: |
aab6538b | 401 | if (!libnfs_accepted_reply(zdrs, &rmb->reply.areply)) { |
763cd6e3 RS |
402 | return FALSE; |
403 | } | |
404 | return TRUE; | |
405 | case MSG_DENIED: | |
aab6538b | 406 | if (!libnfs_rejected_reply(zdrs, &rmb->reply.rreply)) { |
763cd6e3 RS |
407 | return FALSE; |
408 | } | |
409 | return TRUE; | |
410 | } | |
411 | ||
412 | return FALSE; | |
413 | } | |
414 | ||
415 | static bool_t libnfs_rpc_msg(ZDR *zdrs, struct rpc_msg *msg) | |
416 | { | |
aab6538b | 417 | if (!libnfs_zdr_u_int(zdrs, &msg->xid)) { |
763cd6e3 RS |
418 | return FALSE; |
419 | } | |
420 | ||
aab6538b | 421 | if (!libnfs_zdr_u_int(zdrs, &msg->direction)) { |
763cd6e3 RS |
422 | return FALSE; |
423 | } | |
424 | ||
aab6538b | 425 | switch (msg->direction) { |
763cd6e3 | 426 | case CALL: |
aab6538b | 427 | return libnfs_rpc_call_body(zdrs, &msg->body.cbody); |
763cd6e3 RS |
428 | break; |
429 | case REPLY: | |
aab6538b | 430 | return libnfs_rpc_reply_body(zdrs, &msg->body.rbody); |
763cd6e3 RS |
431 | break; |
432 | default: | |
433 | return FALSE; | |
434 | } | |
435 | } | |
436 | ||
437 | bool_t libnfs_zdr_callmsg(ZDR *zdrs, struct rpc_msg *msg) | |
438 | { | |
439 | return libnfs_rpc_msg(zdrs, msg); | |
440 | } | |
441 | ||
442 | bool_t libnfs_zdr_replymsg(ZDR *zdrs, struct rpc_msg *msg) | |
443 | { | |
444 | return libnfs_rpc_msg(zdrs, msg); | |
445 | } | |
446 | ||
67ba2239 | 447 | struct AUTH *authnone_create(void) |
763cd6e3 | 448 | { |
67ba2239 | 449 | struct AUTH *auth; |
763cd6e3 | 450 | |
67ba2239 | 451 | auth = malloc(sizeof(struct AUTH)); |
763cd6e3 RS |
452 | |
453 | auth->ah_cred.oa_flavor = AUTH_NONE; | |
454 | auth->ah_cred.oa_length = 0; | |
455 | auth->ah_cred.oa_base = NULL; | |
456 | ||
457 | auth->ah_verf.oa_flavor = AUTH_NONE; | |
458 | auth->ah_verf.oa_length = 0; | |
459 | auth->ah_verf.oa_base = NULL; | |
460 | ||
461 | auth->ah_private = NULL; | |
462 | ||
463 | return auth; | |
464 | } | |
465 | ||
67ba2239 | 466 | struct AUTH *libnfs_authunix_create(char *host, uint32_t uid, uint32_t gid, uint32_t len, uint32_t *groups) |
763cd6e3 | 467 | { |
67ba2239 | 468 | struct AUTH *auth; |
763cd6e3 RS |
469 | int size; |
470 | uint32_t *buf; | |
471 | int idx; | |
472 | ||
473 | size = 4 + 4 + ((strlen(host) + 3) & ~3) + 4 + 4 + 4 + len * 4; | |
67ba2239 | 474 | auth = malloc(sizeof(struct AUTH)); |
763cd6e3 RS |
475 | auth->ah_cred.oa_flavor = AUTH_UNIX; |
476 | auth->ah_cred.oa_length = size; | |
477 | auth->ah_cred.oa_base = malloc(size); | |
478 | ||
45670bd0 | 479 | buf = (uint32_t *)auth->ah_cred.oa_base; |
763cd6e3 RS |
480 | idx = 0; |
481 | buf[idx++] = htonl(time(NULL)); | |
482 | buf[idx++] = htonl(strlen(host)); | |
483 | memcpy(&buf[2], host, strlen(host)); | |
484 | ||
485 | idx += (strlen(host) + 3) >> 2; | |
486 | buf[idx++] = htonl(uid); | |
487 | buf[idx++] = htonl(gid); | |
488 | buf[idx++] = htonl(len); | |
489 | while (len-- > 0) { | |
490 | buf[idx++] = htonl(*groups++); | |
491 | } | |
492 | ||
493 | auth->ah_verf.oa_flavor = AUTH_NONE; | |
494 | auth->ah_verf.oa_length = 0; | |
495 | auth->ah_verf.oa_base = NULL; | |
496 | ||
497 | auth->ah_private = NULL; | |
498 | ||
499 | return auth; | |
500 | } | |
501 | ||
67ba2239 | 502 | struct AUTH *libnfs_authunix_create_default(void) |
763cd6e3 | 503 | { |
67a9f57e RS |
504 | #ifdef WIN32 |
505 | return libnfs_authunix_create("libnfs", 65535, 65535, 0, NULL); | |
506 | #else | |
43e0e7a7 | 507 | return libnfs_authunix_create("libnfs", getuid(), getgid(), 0, NULL); |
67a9f57e | 508 | #endif |
763cd6e3 RS |
509 | } |
510 | ||
67ba2239 | 511 | void libnfs_auth_destroy(struct AUTH *auth) |
763cd6e3 RS |
512 | { |
513 | if (auth->ah_cred.oa_base) { | |
514 | free(auth->ah_cred.oa_base); | |
515 | } | |
516 | if (auth->ah_verf.oa_base) { | |
517 | free(auth->ah_verf.oa_base); | |
518 | } | |
519 | free(auth); | |
520 | } | |
521 |