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