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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 | */ | |
23 | ||
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
26 | #include "libnfs-zdr.h" | |
27 | ||
28 | struct opaque_auth _null_auth; | |
29 | ||
30 | bool_t libnfs_zdr_setpos(ZDR *zdrs, uint32_t pos) | |
31 | { | |
32 | zdrs->pos = pos; | |
242b81cf RS |
33 | |
34 | return TRUE; | |
763cd6e3 RS |
35 | } |
36 | ||
37 | uint32_t libnfs_zdr_getpos(ZDR *zdrs) | |
38 | { | |
39 | return zdrs->pos; | |
40 | } | |
41 | ||
42 | void libnfs_zdrmem_create(ZDR *zdrs, const caddr_t addr, uint32_t size, enum zdr_op xop) | |
43 | { | |
44 | zdrs->x_op = xop; | |
45 | zdrs->buf = addr; | |
46 | zdrs->size = size; | |
47 | zdrs->pos = 0; | |
48 | zdrs->mem = NULL; | |
49 | } | |
50 | ||
51 | static void *zdr_malloc(ZDR *zdrs, uint32_t size) | |
52 | { | |
53 | struct zdr_mem *mem; | |
54 | ||
55 | mem = malloc(sizeof(struct zdr_mem)); | |
56 | mem->next = zdrs->mem; | |
57 | mem->size = size; | |
58 | mem->buf = malloc(mem->size); | |
59 | zdrs->mem = mem; | |
60 | ||
61 | return mem->buf; | |
62 | } | |
63 | ||
64 | void libnfs_zdr_destroy(ZDR *zdrs) | |
65 | { | |
66 | while (zdrs->mem != NULL) { | |
67 | struct zdr_mem *mem = zdrs->mem->next; | |
68 | free(zdrs->mem->buf); | |
69 | free(zdrs->mem); | |
70 | zdrs->mem = mem; | |
71 | } | |
72 | } | |
73 | ||
74 | bool_t libnfs_zdr_u_int(ZDR *zdrs, uint32_t *u) | |
75 | { | |
76 | if (zdrs->pos + 4 > zdrs->size) { | |
77 | return FALSE; | |
78 | } | |
79 | ||
80 | switch (zdrs->x_op) { | |
81 | case ZDR_ENCODE: | |
82 | *(uint32_t *)&zdrs->buf[zdrs->pos] = htonl(*u); | |
83 | zdrs->pos += 4; | |
84 | return TRUE; | |
85 | break; | |
86 | case ZDR_DECODE: | |
87 | *u = ntohl(*(uint32_t *)&zdrs->buf[zdrs->pos]); | |
88 | zdrs->pos += 4; | |
89 | return TRUE; | |
90 | break; | |
91 | } | |
92 | ||
93 | return FALSE; | |
94 | } | |
95 | ||
96 | bool_t libnfs_zdr_int(ZDR *zdrs, int32_t *i) | |
97 | { | |
98 | return libnfs_zdr_u_int(zdrs, (uint32_t *)i); | |
99 | } | |
100 | ||
101 | bool_t libnfs_zdr_u_quad_t(ZDR *zdrs, uint64_t *u) | |
102 | { | |
103 | if (zdrs->pos + 8 > zdrs->size) { | |
104 | return FALSE; | |
105 | } | |
106 | ||
107 | switch (zdrs->x_op) { | |
108 | case ZDR_ENCODE: | |
109 | *(uint32_t *)&zdrs->buf[zdrs->pos] = htonl((*u >> 32)); | |
110 | zdrs->pos += 4; | |
111 | *(uint32_t *)&zdrs->buf[zdrs->pos] = htonl((*u & 0xffffffff)); | |
112 | zdrs->pos += 4; | |
113 | return TRUE; | |
114 | break; | |
115 | case ZDR_DECODE: | |
116 | *u = ntohl(*(uint32_t *)&zdrs->buf[zdrs->pos]); | |
117 | zdrs->pos += 4; | |
118 | *u <<= 32; | |
119 | *u |= ntohl(*(uint32_t *)&zdrs->buf[zdrs->pos]); | |
120 | zdrs->pos += 4; | |
121 | return TRUE; | |
122 | break; | |
123 | } | |
124 | ||
125 | return FALSE; | |
126 | } | |
127 | ||
128 | bool_t libnfs_zdr_quad_t(ZDR *zdrs, int64_t *i) | |
129 | { | |
130 | return libnfs_zdr_u_quad_t(zdrs, (uint64_t *)i); | |
131 | } | |
132 | ||
133 | bool_t libnfs_zdr_bytes(ZDR *zdrs, char **bufp, uint32_t *size, uint32_t maxsize) | |
134 | { | |
135 | if (!libnfs_zdr_u_int(zdrs, size)) { | |
136 | return FALSE; | |
137 | } | |
138 | ||
139 | if (zdrs->pos + *size > zdrs->size) { | |
140 | return FALSE; | |
141 | } | |
142 | ||
143 | switch (zdrs->x_op) { | |
144 | case ZDR_ENCODE: | |
145 | memcpy(&zdrs->buf[zdrs->pos], *bufp, *size); | |
146 | zdrs->pos += *size; | |
147 | zdrs->pos = (zdrs->pos + 3) & ~3; | |
148 | return TRUE; | |
149 | case ZDR_DECODE: | |
150 | if (*bufp == NULL) { | |
151 | *bufp = zdr_malloc(zdrs, *size); | |
152 | } | |
153 | memcpy(*bufp, &zdrs->buf[zdrs->pos], *size); | |
154 | zdrs->pos += *size; | |
155 | zdrs->pos = (zdrs->pos + 3) & ~3; | |
156 | return TRUE; | |
157 | } | |
158 | ||
159 | return FALSE; | |
160 | } | |
161 | ||
162 | ||
163 | bool_t libnfs_zdr_enum(ZDR *zdrs, int32_t *e) | |
164 | { | |
165 | return libnfs_zdr_u_int(zdrs, (uint32_t *)e); | |
166 | } | |
167 | ||
168 | bool_t libnfs_zdr_bool(ZDR *zdrs, bool_t *b) | |
169 | { | |
170 | return libnfs_zdr_u_int(zdrs, (uint32_t *)b); | |
171 | } | |
172 | ||
173 | bool_t libnfs_zdr_void(void) | |
174 | { | |
175 | return TRUE; | |
176 | } | |
177 | ||
178 | bool_t libnfs_zdr_pointer(ZDR *zdrs, char **objp, uint32_t size, zdrproc_t proc) | |
179 | { | |
180 | bool_t more_data; | |
181 | ||
182 | more_data = (*objp != NULL); | |
183 | ||
184 | if (!libnfs_zdr_bool(zdrs, &more_data)) { | |
185 | return FALSE; | |
186 | } | |
187 | if (more_data == 0) { | |
188 | *objp = NULL; | |
189 | return TRUE; | |
190 | } | |
191 | ||
192 | if (zdrs->x_op == ZDR_DECODE) { | |
193 | *objp = zdr_malloc(zdrs, size); | |
194 | if (*objp == NULL) { | |
195 | return FALSE; | |
196 | } | |
197 | memset(*objp, 0, size); | |
198 | } | |
199 | return proc(zdrs, *objp); | |
200 | } | |
201 | ||
202 | bool_t libnfs_zdr_opaque(ZDR *zdrs, char *objp, uint32_t size) | |
203 | { | |
204 | switch (zdrs->x_op) { | |
205 | case ZDR_ENCODE: | |
206 | memcpy(&zdrs->buf[zdrs->pos], objp, size); | |
207 | zdrs->pos += size; | |
208 | zdrs->pos = (zdrs->pos + 3) & ~3; | |
209 | return TRUE; | |
210 | case ZDR_DECODE: | |
211 | memcpy(objp, &zdrs->buf[zdrs->pos], size); | |
212 | zdrs->pos += size; | |
213 | zdrs->pos = (zdrs->pos + 3) & ~3; | |
214 | return TRUE; | |
215 | } | |
216 | ||
217 | return FALSE; | |
218 | } | |
219 | ||
220 | bool_t libnfs_zdr_string(ZDR *zdrs, char **strp, uint32_t maxsize) | |
221 | { | |
222 | uint32_t size; | |
223 | ||
224 | if (zdrs->x_op == ZDR_ENCODE) { | |
225 | size = strlen(*strp); | |
226 | } | |
227 | ||
228 | if (!libnfs_zdr_u_int(zdrs, &size)) { | |
229 | return FALSE; | |
230 | } | |
231 | ||
232 | if (zdrs->pos + size > zdrs->size) { | |
233 | return FALSE; | |
234 | } | |
235 | ||
236 | switch (zdrs->x_op) { | |
237 | case ZDR_ENCODE: | |
238 | return libnfs_zdr_opaque(zdrs, *strp, size); | |
239 | case ZDR_DECODE: | |
240 | *strp = zdr_malloc(zdrs, size + 1); | |
241 | if (*strp == NULL) { | |
242 | return FALSE; | |
243 | } | |
244 | (*strp)[size] = 0; | |
245 | return libnfs_zdr_opaque(zdrs, *strp, size); | |
246 | } | |
247 | ||
248 | return FALSE; | |
249 | } | |
250 | ||
251 | bool_t libnfs_zdr_array(ZDR *zdrs, char **arrp, uint32_t *size, uint32_t maxsize, uint32_t elsize, zdrproc_t proc) | |
252 | { | |
253 | int i; | |
254 | ||
255 | if (!libnfs_zdr_u_int(zdrs, size)) { | |
256 | return FALSE; | |
257 | } | |
258 | ||
259 | if (zdrs->pos + *size * elsize > zdrs->size) { | |
260 | return FALSE; | |
261 | } | |
262 | ||
263 | if (zdrs->x_op == ZDR_DECODE) { | |
264 | *arrp = zdr_malloc(zdrs, *size * elsize); | |
265 | if (*arrp == NULL) { | |
266 | return FALSE; | |
267 | } | |
268 | memset(*arrp, 0, *size * elsize); | |
269 | } | |
270 | ||
271 | for (i = 0; i < *size; i++) { | |
272 | if (proc(zdrs, *arrp + i * elsize)) { | |
273 | return FALSE; | |
274 | } | |
275 | } | |
276 | return TRUE; | |
277 | } | |
278 | ||
279 | void libnfs_zdr_free(zdrproc_t proc, char *objp) | |
280 | { | |
281 | } | |
282 | ||
283 | static bool_t libnfs_opaque_auth(ZDR *zdrs, struct opaque_auth *auth) | |
284 | { | |
285 | if (!libnfs_zdr_u_int(zdrs, &auth->oa_flavor)) { | |
286 | return FALSE; | |
287 | } | |
288 | ||
289 | if (!libnfs_zdr_bytes(zdrs, &auth->oa_base, &auth->oa_length, &auth->oa_length)) { | |
290 | return FALSE; | |
291 | } | |
292 | ||
293 | return TRUE; | |
294 | } | |
295 | ||
296 | static bool_t libnfs_rpc_call_body(ZDR *zdrs, struct call_body *cmb) | |
297 | { | |
298 | if (!libnfs_zdr_u_int(zdrs, &cmb->cb_rpcvers)) { | |
299 | return FALSE; | |
300 | } | |
301 | ||
302 | if (!libnfs_zdr_u_int(zdrs, &cmb->cb_prog)) { | |
303 | return FALSE; | |
304 | } | |
305 | ||
306 | if (!libnfs_zdr_u_int(zdrs, &cmb->cb_vers)) { | |
307 | return FALSE; | |
308 | } | |
309 | ||
310 | if (!libnfs_zdr_u_int(zdrs, &cmb->cb_proc)) { | |
311 | return FALSE; | |
312 | } | |
313 | ||
314 | if (!libnfs_opaque_auth(zdrs, &cmb->cb_cred)) { | |
315 | return FALSE; | |
316 | } | |
317 | ||
318 | if (!libnfs_opaque_auth(zdrs, &cmb->cb_verf)) { | |
319 | return FALSE; | |
320 | } | |
10a0ceaa RS |
321 | |
322 | return TRUE; | |
763cd6e3 RS |
323 | } |
324 | ||
325 | static bool_t libnfs_accepted_reply(ZDR *zdrs, struct accepted_reply *ar) | |
326 | { | |
327 | if (!libnfs_opaque_auth(zdrs, &ar->ar_verf)) { | |
328 | return FALSE; | |
329 | } | |
330 | ||
331 | if (!libnfs_zdr_u_int(zdrs, &ar->ar_stat)) { | |
332 | return FALSE; | |
333 | } | |
334 | ||
335 | switch (ar->ar_stat) { | |
336 | case SUCCESS: | |
337 | if (!ar->ar_results.proc(zdrs, ar->ar_results.where)) { | |
338 | return FALSE; | |
339 | } | |
340 | return TRUE; | |
341 | case PROG_MISMATCH: | |
342 | if (!libnfs_zdr_u_int(zdrs, &ar->ar_vers.low)) { | |
343 | return FALSE; | |
344 | } | |
345 | if (!libnfs_zdr_u_int(zdrs, &ar->ar_vers.high)) { | |
346 | return FALSE; | |
347 | } | |
348 | return TRUE; | |
349 | default: | |
350 | return TRUE; | |
351 | } | |
352 | ||
353 | return FALSE; | |
354 | } | |
355 | ||
356 | static bool_t libnfs_rejected_reply(ZDR *zdrs, struct rejected_reply *RP_dr) | |
357 | { | |
358 | printf("rejected reply\n"); | |
359 | exit(10); | |
360 | } | |
361 | ||
362 | static bool_t libnfs_rpc_reply_body(ZDR *zdrs, struct reply_body *rmb) | |
363 | { | |
364 | if (!libnfs_zdr_u_int(zdrs, &rmb->rp_stat)) { | |
365 | return FALSE; | |
366 | } | |
367 | ||
368 | switch (rmb->rp_stat) { | |
369 | case MSG_ACCEPTED: | |
370 | if (!libnfs_accepted_reply(zdrs, &rmb->rp_acpt)) { | |
371 | return FALSE; | |
372 | } | |
373 | return TRUE; | |
374 | case MSG_DENIED: | |
375 | if (!libnfs_rejected_reply(zdrs, &rmb->rp_rjct)) { | |
376 | return FALSE; | |
377 | } | |
378 | return TRUE; | |
379 | } | |
380 | ||
381 | return FALSE; | |
382 | } | |
383 | ||
384 | static bool_t libnfs_rpc_msg(ZDR *zdrs, struct rpc_msg *msg) | |
385 | { | |
386 | if (!libnfs_zdr_u_int(zdrs, &msg->rm_xid)) { | |
387 | return FALSE; | |
388 | } | |
389 | ||
390 | if (!libnfs_zdr_u_int(zdrs, &msg->rm_direction)) { | |
391 | return FALSE; | |
392 | } | |
393 | ||
394 | switch (msg->rm_direction) { | |
395 | case CALL: | |
396 | return libnfs_rpc_call_body(zdrs, &msg->ru.RM_cmb); | |
397 | break; | |
398 | case REPLY: | |
399 | return libnfs_rpc_reply_body(zdrs, &msg->ru.RM_rmb); | |
400 | break; | |
401 | default: | |
402 | return FALSE; | |
403 | } | |
404 | } | |
405 | ||
406 | bool_t libnfs_zdr_callmsg(ZDR *zdrs, struct rpc_msg *msg) | |
407 | { | |
408 | return libnfs_rpc_msg(zdrs, msg); | |
409 | } | |
410 | ||
411 | bool_t libnfs_zdr_replymsg(ZDR *zdrs, struct rpc_msg *msg) | |
412 | { | |
413 | return libnfs_rpc_msg(zdrs, msg); | |
414 | } | |
415 | ||
416 | AUTH *authnone_create(void) | |
417 | { | |
418 | AUTH *auth; | |
419 | ||
420 | auth = malloc(sizeof(AUTH)); | |
421 | ||
422 | auth->ah_cred.oa_flavor = AUTH_NONE; | |
423 | auth->ah_cred.oa_length = 0; | |
424 | auth->ah_cred.oa_base = NULL; | |
425 | ||
426 | auth->ah_verf.oa_flavor = AUTH_NONE; | |
427 | auth->ah_verf.oa_length = 0; | |
428 | auth->ah_verf.oa_base = NULL; | |
429 | ||
430 | auth->ah_private = NULL; | |
431 | ||
432 | return auth; | |
433 | } | |
434 | ||
435 | AUTH *libnfs_authunix_create(char *host, uint32_t uid, uint32_t gid, uint32_t len, uint32_t *groups) | |
436 | { | |
437 | AUTH *auth; | |
438 | int size; | |
439 | uint32_t *buf; | |
440 | int idx; | |
441 | ||
442 | size = 4 + 4 + ((strlen(host) + 3) & ~3) + 4 + 4 + 4 + len * 4; | |
443 | auth = malloc(sizeof(AUTH)); | |
444 | auth->ah_cred.oa_flavor = AUTH_UNIX; | |
445 | auth->ah_cred.oa_length = size; | |
446 | auth->ah_cred.oa_base = malloc(size); | |
447 | ||
448 | buf = auth->ah_cred.oa_base; | |
449 | idx = 0; | |
450 | buf[idx++] = htonl(time(NULL)); | |
451 | buf[idx++] = htonl(strlen(host)); | |
452 | memcpy(&buf[2], host, strlen(host)); | |
453 | ||
454 | idx += (strlen(host) + 3) >> 2; | |
455 | buf[idx++] = htonl(uid); | |
456 | buf[idx++] = htonl(gid); | |
457 | buf[idx++] = htonl(len); | |
458 | while (len-- > 0) { | |
459 | buf[idx++] = htonl(*groups++); | |
460 | } | |
461 | ||
462 | auth->ah_verf.oa_flavor = AUTH_NONE; | |
463 | auth->ah_verf.oa_length = 0; | |
464 | auth->ah_verf.oa_base = NULL; | |
465 | ||
466 | auth->ah_private = NULL; | |
467 | ||
468 | return auth; | |
469 | } | |
470 | ||
471 | AUTH *libnfs_authunix_create_default(void) | |
472 | { | |
473 | return libnfs_authunix_create("libnfs", getuid(), -1, 0, NULL); | |
474 | } | |
475 | ||
476 | void libnfs_auth_destroy(AUTH *auth) | |
477 | { | |
478 | if (auth->ah_cred.oa_base) { | |
479 | free(auth->ah_cred.oa_base); | |
480 | } | |
481 | if (auth->ah_verf.oa_base) { | |
482 | free(auth->ah_verf.oa_base); | |
483 | } | |
484 | free(auth); | |
485 | } | |
486 |