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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" | |
25 | #else | |
26 | #include <arpa/inet.h> | |
27 | #endif/*WIN32*/ | |
763cd6e3 RS |
28 | |
29 | #include <stdlib.h> | |
30 | #include <string.h> | |
b1406276 | 31 | #include <time.h> |
763cd6e3 RS |
32 | #include "libnfs-zdr.h" |
33 | ||
34 | struct opaque_auth _null_auth; | |
35 | ||
36 | bool_t libnfs_zdr_setpos(ZDR *zdrs, uint32_t pos) | |
37 | { | |
38 | zdrs->pos = pos; | |
242b81cf RS |
39 | |
40 | return TRUE; | |
763cd6e3 RS |
41 | } |
42 | ||
43 | uint32_t libnfs_zdr_getpos(ZDR *zdrs) | |
44 | { | |
45 | return zdrs->pos; | |
46 | } | |
47 | ||
48 | void libnfs_zdrmem_create(ZDR *zdrs, const caddr_t addr, uint32_t size, enum zdr_op xop) | |
49 | { | |
50 | zdrs->x_op = xop; | |
51 | zdrs->buf = addr; | |
52 | zdrs->size = size; | |
53 | zdrs->pos = 0; | |
54 | zdrs->mem = NULL; | |
55 | } | |
56 | ||
57 | static void *zdr_malloc(ZDR *zdrs, uint32_t size) | |
58 | { | |
59 | struct zdr_mem *mem; | |
60 | ||
61 | mem = malloc(sizeof(struct zdr_mem)); | |
62 | mem->next = zdrs->mem; | |
63 | mem->size = size; | |
64 | mem->buf = malloc(mem->size); | |
65 | zdrs->mem = mem; | |
66 | ||
67 | return mem->buf; | |
68 | } | |
69 | ||
70 | void libnfs_zdr_destroy(ZDR *zdrs) | |
71 | { | |
72 | while (zdrs->mem != NULL) { | |
73 | struct zdr_mem *mem = zdrs->mem->next; | |
74 | free(zdrs->mem->buf); | |
75 | free(zdrs->mem); | |
76 | zdrs->mem = mem; | |
77 | } | |
78 | } | |
79 | ||
80 | bool_t libnfs_zdr_u_int(ZDR *zdrs, uint32_t *u) | |
81 | { | |
82 | if (zdrs->pos + 4 > zdrs->size) { | |
83 | return FALSE; | |
84 | } | |
85 | ||
86 | switch (zdrs->x_op) { | |
87 | case ZDR_ENCODE: | |
88 | *(uint32_t *)&zdrs->buf[zdrs->pos] = htonl(*u); | |
89 | zdrs->pos += 4; | |
90 | return TRUE; | |
91 | break; | |
92 | case ZDR_DECODE: | |
93 | *u = ntohl(*(uint32_t *)&zdrs->buf[zdrs->pos]); | |
94 | zdrs->pos += 4; | |
95 | return TRUE; | |
96 | break; | |
97 | } | |
98 | ||
99 | return FALSE; | |
100 | } | |
101 | ||
102 | bool_t libnfs_zdr_int(ZDR *zdrs, int32_t *i) | |
103 | { | |
104 | return libnfs_zdr_u_int(zdrs, (uint32_t *)i); | |
105 | } | |
106 | ||
107 | bool_t libnfs_zdr_u_quad_t(ZDR *zdrs, uint64_t *u) | |
108 | { | |
109 | if (zdrs->pos + 8 > zdrs->size) { | |
110 | return FALSE; | |
111 | } | |
112 | ||
113 | switch (zdrs->x_op) { | |
114 | case ZDR_ENCODE: | |
115 | *(uint32_t *)&zdrs->buf[zdrs->pos] = htonl((*u >> 32)); | |
116 | zdrs->pos += 4; | |
117 | *(uint32_t *)&zdrs->buf[zdrs->pos] = htonl((*u & 0xffffffff)); | |
118 | zdrs->pos += 4; | |
119 | return TRUE; | |
120 | break; | |
121 | case ZDR_DECODE: | |
122 | *u = ntohl(*(uint32_t *)&zdrs->buf[zdrs->pos]); | |
123 | zdrs->pos += 4; | |
124 | *u <<= 32; | |
125 | *u |= ntohl(*(uint32_t *)&zdrs->buf[zdrs->pos]); | |
126 | zdrs->pos += 4; | |
127 | return TRUE; | |
128 | break; | |
129 | } | |
130 | ||
131 | return FALSE; | |
132 | } | |
133 | ||
134 | bool_t libnfs_zdr_quad_t(ZDR *zdrs, int64_t *i) | |
135 | { | |
136 | return libnfs_zdr_u_quad_t(zdrs, (uint64_t *)i); | |
137 | } | |
138 | ||
139 | bool_t libnfs_zdr_bytes(ZDR *zdrs, char **bufp, uint32_t *size, uint32_t maxsize) | |
140 | { | |
141 | if (!libnfs_zdr_u_int(zdrs, size)) { | |
142 | return FALSE; | |
143 | } | |
144 | ||
145 | if (zdrs->pos + *size > zdrs->size) { | |
146 | return FALSE; | |
147 | } | |
148 | ||
149 | switch (zdrs->x_op) { | |
150 | case ZDR_ENCODE: | |
151 | memcpy(&zdrs->buf[zdrs->pos], *bufp, *size); | |
152 | zdrs->pos += *size; | |
153 | zdrs->pos = (zdrs->pos + 3) & ~3; | |
154 | return TRUE; | |
155 | case ZDR_DECODE: | |
156 | if (*bufp == NULL) { | |
157 | *bufp = zdr_malloc(zdrs, *size); | |
158 | } | |
159 | memcpy(*bufp, &zdrs->buf[zdrs->pos], *size); | |
160 | zdrs->pos += *size; | |
161 | zdrs->pos = (zdrs->pos + 3) & ~3; | |
162 | return TRUE; | |
163 | } | |
164 | ||
165 | return FALSE; | |
166 | } | |
167 | ||
168 | ||
442b829a | 169 | bool_t libnfs_zdr_enum(ZDR *zdrs, enum_t *e) |
763cd6e3 | 170 | { |
442b829a RS |
171 | bool_t ret; |
172 | int32_t i = *e; | |
173 | ||
174 | ret = libnfs_zdr_u_int(zdrs, (uint32_t *)&i); | |
175 | *e = i; | |
176 | ||
177 | return ret; | |
763cd6e3 RS |
178 | } |
179 | ||
180 | bool_t libnfs_zdr_bool(ZDR *zdrs, bool_t *b) | |
181 | { | |
182 | return libnfs_zdr_u_int(zdrs, (uint32_t *)b); | |
183 | } | |
184 | ||
185 | bool_t libnfs_zdr_void(void) | |
186 | { | |
187 | return TRUE; | |
188 | } | |
189 | ||
190 | bool_t libnfs_zdr_pointer(ZDR *zdrs, char **objp, uint32_t size, zdrproc_t proc) | |
191 | { | |
192 | bool_t more_data; | |
193 | ||
194 | more_data = (*objp != NULL); | |
195 | ||
196 | if (!libnfs_zdr_bool(zdrs, &more_data)) { | |
197 | return FALSE; | |
198 | } | |
199 | if (more_data == 0) { | |
200 | *objp = NULL; | |
201 | return TRUE; | |
202 | } | |
203 | ||
204 | if (zdrs->x_op == ZDR_DECODE) { | |
205 | *objp = zdr_malloc(zdrs, size); | |
206 | if (*objp == NULL) { | |
207 | return FALSE; | |
208 | } | |
209 | memset(*objp, 0, size); | |
210 | } | |
211 | return proc(zdrs, *objp); | |
212 | } | |
213 | ||
214 | bool_t libnfs_zdr_opaque(ZDR *zdrs, char *objp, uint32_t size) | |
215 | { | |
216 | switch (zdrs->x_op) { | |
217 | case ZDR_ENCODE: | |
218 | memcpy(&zdrs->buf[zdrs->pos], objp, size); | |
219 | zdrs->pos += size; | |
220 | zdrs->pos = (zdrs->pos + 3) & ~3; | |
221 | return TRUE; | |
222 | case ZDR_DECODE: | |
223 | memcpy(objp, &zdrs->buf[zdrs->pos], size); | |
224 | zdrs->pos += size; | |
225 | zdrs->pos = (zdrs->pos + 3) & ~3; | |
226 | return TRUE; | |
227 | } | |
228 | ||
229 | return FALSE; | |
230 | } | |
231 | ||
232 | bool_t libnfs_zdr_string(ZDR *zdrs, char **strp, uint32_t maxsize) | |
233 | { | |
234 | uint32_t size; | |
235 | ||
236 | if (zdrs->x_op == ZDR_ENCODE) { | |
237 | size = strlen(*strp); | |
238 | } | |
239 | ||
240 | if (!libnfs_zdr_u_int(zdrs, &size)) { | |
241 | return FALSE; | |
242 | } | |
243 | ||
244 | if (zdrs->pos + size > zdrs->size) { | |
245 | return FALSE; | |
246 | } | |
247 | ||
248 | switch (zdrs->x_op) { | |
249 | case ZDR_ENCODE: | |
250 | return libnfs_zdr_opaque(zdrs, *strp, size); | |
251 | case ZDR_DECODE: | |
252 | *strp = zdr_malloc(zdrs, size + 1); | |
253 | if (*strp == NULL) { | |
254 | return FALSE; | |
255 | } | |
256 | (*strp)[size] = 0; | |
257 | return libnfs_zdr_opaque(zdrs, *strp, size); | |
258 | } | |
259 | ||
260 | return FALSE; | |
261 | } | |
262 | ||
263 | bool_t libnfs_zdr_array(ZDR *zdrs, char **arrp, uint32_t *size, uint32_t maxsize, uint32_t elsize, zdrproc_t proc) | |
264 | { | |
265 | int i; | |
266 | ||
267 | if (!libnfs_zdr_u_int(zdrs, size)) { | |
268 | return FALSE; | |
269 | } | |
270 | ||
271 | if (zdrs->pos + *size * elsize > zdrs->size) { | |
272 | return FALSE; | |
273 | } | |
274 | ||
275 | if (zdrs->x_op == ZDR_DECODE) { | |
276 | *arrp = zdr_malloc(zdrs, *size * elsize); | |
277 | if (*arrp == NULL) { | |
278 | return FALSE; | |
279 | } | |
280 | memset(*arrp, 0, *size * elsize); | |
281 | } | |
282 | ||
283 | for (i = 0; i < *size; i++) { | |
5f08d03e | 284 | if (!proc(zdrs, *arrp + i * elsize)) { |
763cd6e3 RS |
285 | return FALSE; |
286 | } | |
287 | } | |
288 | return TRUE; | |
289 | } | |
290 | ||
291 | void libnfs_zdr_free(zdrproc_t proc, char *objp) | |
292 | { | |
293 | } | |
294 | ||
295 | static bool_t libnfs_opaque_auth(ZDR *zdrs, struct opaque_auth *auth) | |
296 | { | |
297 | if (!libnfs_zdr_u_int(zdrs, &auth->oa_flavor)) { | |
298 | return FALSE; | |
299 | } | |
300 | ||
020f1728 | 301 | if (!libnfs_zdr_bytes(zdrs, &auth->oa_base, &auth->oa_length, auth->oa_length)) { |
763cd6e3 RS |
302 | return FALSE; |
303 | } | |
304 | ||
305 | return TRUE; | |
306 | } | |
307 | ||
308 | static bool_t libnfs_rpc_call_body(ZDR *zdrs, struct call_body *cmb) | |
309 | { | |
310 | if (!libnfs_zdr_u_int(zdrs, &cmb->cb_rpcvers)) { | |
311 | return FALSE; | |
312 | } | |
313 | ||
314 | if (!libnfs_zdr_u_int(zdrs, &cmb->cb_prog)) { | |
315 | return FALSE; | |
316 | } | |
317 | ||
318 | if (!libnfs_zdr_u_int(zdrs, &cmb->cb_vers)) { | |
319 | return FALSE; | |
320 | } | |
321 | ||
322 | if (!libnfs_zdr_u_int(zdrs, &cmb->cb_proc)) { | |
323 | return FALSE; | |
324 | } | |
325 | ||
326 | if (!libnfs_opaque_auth(zdrs, &cmb->cb_cred)) { | |
327 | return FALSE; | |
328 | } | |
329 | ||
330 | if (!libnfs_opaque_auth(zdrs, &cmb->cb_verf)) { | |
331 | return FALSE; | |
332 | } | |
10a0ceaa RS |
333 | |
334 | return TRUE; | |
763cd6e3 RS |
335 | } |
336 | ||
337 | static bool_t libnfs_accepted_reply(ZDR *zdrs, struct accepted_reply *ar) | |
338 | { | |
339 | if (!libnfs_opaque_auth(zdrs, &ar->ar_verf)) { | |
340 | return FALSE; | |
341 | } | |
342 | ||
343 | if (!libnfs_zdr_u_int(zdrs, &ar->ar_stat)) { | |
344 | return FALSE; | |
345 | } | |
346 | ||
347 | switch (ar->ar_stat) { | |
348 | case SUCCESS: | |
349 | if (!ar->ar_results.proc(zdrs, ar->ar_results.where)) { | |
350 | return FALSE; | |
351 | } | |
352 | return TRUE; | |
353 | case PROG_MISMATCH: | |
354 | if (!libnfs_zdr_u_int(zdrs, &ar->ar_vers.low)) { | |
355 | return FALSE; | |
356 | } | |
357 | if (!libnfs_zdr_u_int(zdrs, &ar->ar_vers.high)) { | |
358 | return FALSE; | |
359 | } | |
360 | return TRUE; | |
361 | default: | |
362 | return TRUE; | |
363 | } | |
364 | ||
365 | return FALSE; | |
366 | } | |
367 | ||
368 | static bool_t libnfs_rejected_reply(ZDR *zdrs, struct rejected_reply *RP_dr) | |
369 | { | |
370 | printf("rejected reply\n"); | |
371 | exit(10); | |
372 | } | |
373 | ||
374 | static bool_t libnfs_rpc_reply_body(ZDR *zdrs, struct reply_body *rmb) | |
375 | { | |
376 | if (!libnfs_zdr_u_int(zdrs, &rmb->rp_stat)) { | |
377 | return FALSE; | |
378 | } | |
379 | ||
380 | switch (rmb->rp_stat) { | |
381 | case MSG_ACCEPTED: | |
382 | if (!libnfs_accepted_reply(zdrs, &rmb->rp_acpt)) { | |
383 | return FALSE; | |
384 | } | |
385 | return TRUE; | |
386 | case MSG_DENIED: | |
387 | if (!libnfs_rejected_reply(zdrs, &rmb->rp_rjct)) { | |
388 | return FALSE; | |
389 | } | |
390 | return TRUE; | |
391 | } | |
392 | ||
393 | return FALSE; | |
394 | } | |
395 | ||
396 | static bool_t libnfs_rpc_msg(ZDR *zdrs, struct rpc_msg *msg) | |
397 | { | |
398 | if (!libnfs_zdr_u_int(zdrs, &msg->rm_xid)) { | |
399 | return FALSE; | |
400 | } | |
401 | ||
402 | if (!libnfs_zdr_u_int(zdrs, &msg->rm_direction)) { | |
403 | return FALSE; | |
404 | } | |
405 | ||
406 | switch (msg->rm_direction) { | |
407 | case CALL: | |
408 | return libnfs_rpc_call_body(zdrs, &msg->ru.RM_cmb); | |
409 | break; | |
410 | case REPLY: | |
411 | return libnfs_rpc_reply_body(zdrs, &msg->ru.RM_rmb); | |
412 | break; | |
413 | default: | |
414 | return FALSE; | |
415 | } | |
416 | } | |
417 | ||
418 | bool_t libnfs_zdr_callmsg(ZDR *zdrs, struct rpc_msg *msg) | |
419 | { | |
420 | return libnfs_rpc_msg(zdrs, msg); | |
421 | } | |
422 | ||
423 | bool_t libnfs_zdr_replymsg(ZDR *zdrs, struct rpc_msg *msg) | |
424 | { | |
425 | return libnfs_rpc_msg(zdrs, msg); | |
426 | } | |
427 | ||
67ba2239 | 428 | struct AUTH *authnone_create(void) |
763cd6e3 | 429 | { |
67ba2239 | 430 | struct AUTH *auth; |
763cd6e3 | 431 | |
67ba2239 | 432 | auth = malloc(sizeof(struct AUTH)); |
763cd6e3 RS |
433 | |
434 | auth->ah_cred.oa_flavor = AUTH_NONE; | |
435 | auth->ah_cred.oa_length = 0; | |
436 | auth->ah_cred.oa_base = NULL; | |
437 | ||
438 | auth->ah_verf.oa_flavor = AUTH_NONE; | |
439 | auth->ah_verf.oa_length = 0; | |
440 | auth->ah_verf.oa_base = NULL; | |
441 | ||
442 | auth->ah_private = NULL; | |
443 | ||
444 | return auth; | |
445 | } | |
446 | ||
67ba2239 | 447 | struct AUTH *libnfs_authunix_create(char *host, uint32_t uid, uint32_t gid, uint32_t len, uint32_t *groups) |
763cd6e3 | 448 | { |
67ba2239 | 449 | struct AUTH *auth; |
763cd6e3 RS |
450 | int size; |
451 | uint32_t *buf; | |
452 | int idx; | |
453 | ||
454 | size = 4 + 4 + ((strlen(host) + 3) & ~3) + 4 + 4 + 4 + len * 4; | |
67ba2239 | 455 | auth = malloc(sizeof(struct AUTH)); |
763cd6e3 RS |
456 | auth->ah_cred.oa_flavor = AUTH_UNIX; |
457 | auth->ah_cred.oa_length = size; | |
458 | auth->ah_cred.oa_base = malloc(size); | |
459 | ||
45670bd0 | 460 | buf = (uint32_t *)auth->ah_cred.oa_base; |
763cd6e3 RS |
461 | idx = 0; |
462 | buf[idx++] = htonl(time(NULL)); | |
463 | buf[idx++] = htonl(strlen(host)); | |
464 | memcpy(&buf[2], host, strlen(host)); | |
465 | ||
466 | idx += (strlen(host) + 3) >> 2; | |
467 | buf[idx++] = htonl(uid); | |
468 | buf[idx++] = htonl(gid); | |
469 | buf[idx++] = htonl(len); | |
470 | while (len-- > 0) { | |
471 | buf[idx++] = htonl(*groups++); | |
472 | } | |
473 | ||
474 | auth->ah_verf.oa_flavor = AUTH_NONE; | |
475 | auth->ah_verf.oa_length = 0; | |
476 | auth->ah_verf.oa_base = NULL; | |
477 | ||
478 | auth->ah_private = NULL; | |
479 | ||
480 | return auth; | |
481 | } | |
482 | ||
67ba2239 | 483 | struct AUTH *libnfs_authunix_create_default(void) |
763cd6e3 RS |
484 | { |
485 | return libnfs_authunix_create("libnfs", getuid(), -1, 0, NULL); | |
486 | } | |
487 | ||
67ba2239 | 488 | void libnfs_auth_destroy(struct AUTH *auth) |
763cd6e3 RS |
489 | { |
490 | if (auth->ah_cred.oa_base) { | |
491 | free(auth->ah_cred.oa_base); | |
492 | } | |
493 | if (auth->ah_verf.oa_base) { | |
494 | free(auth->ah_verf.oa_base); | |
495 | } | |
496 | free(auth); | |
497 | } | |
498 |