File: | src/usr.sbin/dhcpd/confpars.c |
Warning: | line 1336, column 6 Potential memory leak |
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1 | /* $OpenBSD: confpars.c,v 1.36 2020/04/23 15:00:27 krw Exp $ */ | |||
2 | ||||
3 | /* | |||
4 | * Copyright (c) 1995, 1996, 1997 The Internet Software Consortium. | |||
5 | * All rights reserved. | |||
6 | * | |||
7 | * Redistribution and use in source and binary forms, with or without | |||
8 | * modification, are permitted provided that the following conditions | |||
9 | * are met: | |||
10 | * | |||
11 | * 1. Redistributions of source code must retain the above copyright | |||
12 | * notice, this list of conditions and the following disclaimer. | |||
13 | * 2. Redistributions in binary form must reproduce the above copyright | |||
14 | * notice, this list of conditions and the following disclaimer in the | |||
15 | * documentation and/or other materials provided with the distribution. | |||
16 | * 3. Neither the name of The Internet Software Consortium nor the names | |||
17 | * of its 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 INTERNET SOFTWARE CONSORTIUM AND | |||
21 | * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, | |||
22 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |||
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |||
24 | * DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR | |||
25 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |||
26 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |||
27 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF | |||
28 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |||
29 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, | |||
30 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT | |||
31 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |||
32 | * SUCH DAMAGE. | |||
33 | * | |||
34 | * This software has been written for the Internet Software Consortium | |||
35 | * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie | |||
36 | * Enterprises. To learn more about the Internet Software Consortium, | |||
37 | * see ``http://www.vix.com/isc''. To learn more about Vixie | |||
38 | * Enterprises, see ``http://www.vix.com''. | |||
39 | */ | |||
40 | ||||
41 | #include <sys/types.h> | |||
42 | #include <sys/socket.h> | |||
43 | ||||
44 | #include <net/if.h> | |||
45 | ||||
46 | #include <limits.h> | |||
47 | #include <netdb.h> | |||
48 | #include <resolv.h> | |||
49 | #include <stdio.h> | |||
50 | #include <stdint.h> | |||
51 | #include <stdlib.h> | |||
52 | #include <string.h> | |||
53 | ||||
54 | #include "dhcp.h" | |||
55 | #include "tree.h" | |||
56 | #include "dhcpd.h" | |||
57 | #include "dhctoken.h" | |||
58 | #include "log.h" | |||
59 | ||||
60 | int parse_cidr(FILE *, unsigned char *, unsigned char *); | |||
61 | ||||
62 | /* | |||
63 | * conf-file :== parameters declarations EOF | |||
64 | * parameters :== <nil> | parameter | parameters parameter | |||
65 | * declarations :== <nil> | declaration | declarations declaration | |||
66 | */ | |||
67 | int | |||
68 | readconf(void) | |||
69 | { | |||
70 | FILE *cfile; | |||
71 | char *val; | |||
72 | int token; | |||
73 | int declaration = 0; | |||
74 | ||||
75 | new_parse(path_dhcpd_conf); | |||
76 | ||||
77 | /* Set up the initial dhcp option universe. */ | |||
78 | initialize_universes(); | |||
79 | ||||
80 | /* Set up the global defaults. */ | |||
81 | root_group.default_lease_time = 43200; /* 12 hours. */ | |||
82 | root_group.max_lease_time = 86400; /* 24 hours. */ | |||
83 | root_group.bootp_lease_cutoff = MAX_TIME0x7fffffff; | |||
84 | root_group.boot_unknown_clients = 1; | |||
85 | root_group.allow_bootp = 1; | |||
86 | root_group.allow_booting = 1; | |||
87 | root_group.authoritative = 1; | |||
88 | root_group.echo_client_id = 1; | |||
89 | ||||
90 | if ((cfile = fopen(path_dhcpd_conf, "r")) == NULL((void *)0)) | |||
91 | fatal("Can't open %s", path_dhcpd_conf); | |||
92 | ||||
93 | do { | |||
94 | token = peek_token(&val, cfile); | |||
95 | if (token == EOF(-1)) | |||
96 | break; | |||
97 | declaration = parse_statement(cfile, &root_group, | |||
98 | ROOT_GROUP0, | |||
99 | NULL((void *)0), | |||
100 | declaration); | |||
101 | } while (1); | |||
102 | token = next_token(&val, cfile); /* Clear the peek buffer */ | |||
103 | fclose(cfile); | |||
104 | ||||
105 | return !warnings_occurred; | |||
106 | } | |||
107 | ||||
108 | /* | |||
109 | * lease-file :== lease-declarations EOF | |||
110 | * lease-statments :== <nil> | |||
111 | * | lease-declaration | |||
112 | * | lease-declarations lease-declaration | |||
113 | */ | |||
114 | void | |||
115 | read_leases(void) | |||
116 | { | |||
117 | FILE *cfile; | |||
118 | char *val; | |||
119 | int token; | |||
120 | ||||
121 | new_parse(path_dhcpd_db); | |||
122 | ||||
123 | /* | |||
124 | * Open the lease file. If we can't open it, fail. The reason | |||
125 | * for this is that although on initial startup, the absence of | |||
126 | * a lease file is perfectly benign, if dhcpd has been running | |||
127 | * and this file is absent, it means that dhcpd tried and failed | |||
128 | * to rewrite the lease database. If we proceed and the | |||
129 | * problem which caused the rewrite to fail has been fixed, but no | |||
130 | * human has corrected the database problem, then we are left | |||
131 | * thinking that no leases have been assigned to anybody, which | |||
132 | * could create severe network chaos. | |||
133 | */ | |||
134 | if ((cfile = fopen(path_dhcpd_db, "r")) == NULL((void *)0)) { | |||
| ||||
135 | log_warn("Can't open lease database (%s)", path_dhcpd_db); | |||
136 | log_warnx("check for failed database rewrite attempt!"); | |||
137 | log_warnx("Please read the dhcpd.leases manual page if you"); | |||
138 | fatalx("don't know what to do about this."); | |||
139 | } | |||
140 | ||||
141 | do { | |||
142 | token = next_token(&val, cfile); | |||
143 | if (token == EOF(-1)) | |||
144 | break; | |||
145 | if (token != TOK_LEASE271) { | |||
146 | log_warnx("Corrupt lease file - possible data loss!"); | |||
147 | skip_to_semi(cfile); | |||
148 | } else { | |||
149 | struct lease *lease; | |||
150 | lease = parse_lease_declaration(cfile); | |||
151 | if (lease) | |||
152 | enter_lease(lease); | |||
153 | else | |||
154 | parse_warn("possibly corrupt lease file"); | |||
155 | } | |||
156 | ||||
157 | } while (1); | |||
158 | fclose(cfile); | |||
159 | } | |||
160 | ||||
161 | /* | |||
162 | * statement :== parameter | declaration | |||
163 | * | |||
164 | * parameter :== timestamp | |||
165 | * | DEFAULT_LEASE_TIME lease_time | |||
166 | * | MAX_LEASE_TIME lease_time | |||
167 | * | DYNAMIC_BOOTP_LEASE_CUTOFF date | |||
168 | * | DYNAMIC_BOOTP_LEASE_LENGTH lease_time | |||
169 | * | BOOT_UNKNOWN_CLIENTS boolean | |||
170 | * | GET_LEASE_HOSTNAMES boolean | |||
171 | * | USE_HOST_DECL_NAME boolean | |||
172 | * | NEXT_SERVER ip-addr-or-hostname SEMI | |||
173 | * | option_parameter | |||
174 | * | SERVER-IDENTIFIER ip-addr-or-hostname SEMI | |||
175 | * | FILENAME string-parameter | |||
176 | * | SERVER_NAME string-parameter | |||
177 | * | hardware-parameter | |||
178 | * | fixed-address-parameter | |||
179 | * | ALLOW allow-deny-keyword | |||
180 | * | DENY allow-deny-keyword | |||
181 | * | USE_LEASE_ADDR_FOR_DEFAULT_ROUTE boolean | |||
182 | * | |||
183 | * declaration :== host-declaration | |||
184 | * | group-declaration | |||
185 | * | shared-network-declaration | |||
186 | * | subnet-declaration | |||
187 | * | VENDOR_CLASS class-declaration | |||
188 | * | USER_CLASS class-declaration | |||
189 | * | RANGE address-range-declaration | |||
190 | */ | |||
191 | int | |||
192 | parse_statement(FILE *cfile, struct group *group, int type, | |||
193 | struct host_decl *host_decl, int declaration) | |||
194 | { | |||
195 | int token; | |||
196 | char *val; | |||
197 | struct shared_network *share; | |||
198 | char *n; | |||
199 | struct tree *tree; | |||
200 | struct tree_cache *cache; | |||
201 | struct hardware hardware; | |||
202 | ||||
203 | switch (next_token(&val, cfile)) { | |||
204 | case TOK_HOST256: | |||
205 | if (type != HOST_DECL1) | |||
206 | parse_host_declaration(cfile, group); | |||
207 | else { | |||
208 | parse_warn("host declarations not allowed here."); | |||
209 | skip_to_semi(cfile); | |||
210 | } | |||
211 | return 1; | |||
212 | ||||
213 | case TOK_GROUP293: | |||
214 | if (type != HOST_DECL1) | |||
215 | parse_group_declaration(cfile, group); | |||
216 | else { | |||
217 | parse_warn("host declarations not allowed here."); | |||
218 | skip_to_semi(cfile); | |||
219 | } | |||
220 | return 1; | |||
221 | ||||
222 | case TOK_TIMESTAMP266: | |||
223 | break; | |||
224 | ||||
225 | case TOK_SHARED_NETWORK284: | |||
226 | if (type == SHARED_NET_DECL2 || | |||
227 | type == HOST_DECL1 || | |||
228 | type == SUBNET_DECL3) { | |||
229 | parse_warn("shared-network parameters not %s.", | |||
230 | "allowed here"); | |||
231 | skip_to_semi(cfile); | |||
232 | break; | |||
233 | } | |||
234 | ||||
235 | parse_shared_net_declaration(cfile, group); | |||
236 | return 1; | |||
237 | ||||
238 | case TOK_SUBNET278: | |||
239 | if (type == HOST_DECL1 || type == SUBNET_DECL3) { | |||
240 | parse_warn("subnet declarations not allowed here."); | |||
241 | skip_to_semi(cfile); | |||
242 | return 1; | |||
243 | } | |||
244 | ||||
245 | /* If we're in a subnet declaration, just do the parse. */ | |||
246 | if (group->shared_network) { | |||
247 | parse_subnet_declaration(cfile, | |||
248 | group->shared_network); | |||
249 | break; | |||
250 | } | |||
251 | ||||
252 | /* | |||
253 | * Otherwise, cons up a fake shared network structure | |||
254 | * and populate it with the lone subnet. | |||
255 | */ | |||
256 | ||||
257 | share = calloc(1, sizeof(struct shared_network)); | |||
258 | if (!share) | |||
259 | fatalx("No memory for shared subnet"); | |||
260 | share->group = clone_group(group, "parse_statement:subnet"); | |||
261 | share->group->shared_network = share; | |||
262 | ||||
263 | parse_subnet_declaration(cfile, share); | |||
264 | ||||
265 | /* share->subnets is the subnet we just parsed. */ | |||
266 | if (share->subnets) { | |||
267 | share->interface = | |||
268 | share->subnets->interface; | |||
269 | ||||
270 | /* Make the shared network name from network number. */ | |||
271 | n = piaddr(share->subnets->net); | |||
272 | share->name = strdup(n); | |||
273 | if (share->name == NULL((void *)0)) | |||
274 | fatalx("no memory for subnet name"); | |||
275 | ||||
276 | /* | |||
277 | * Copy the authoritative parameter from the subnet, | |||
278 | * since there is no opportunity to declare it here. | |||
279 | */ | |||
280 | share->group->authoritative = | |||
281 | share->subnets->group->authoritative; | |||
282 | enter_shared_network(share); | |||
283 | } | |||
284 | return 1; | |||
285 | ||||
286 | case TOK_VENDOR_CLASS282: | |||
287 | parse_class_declaration(cfile, group, 0); | |||
288 | return 1; | |||
289 | ||||
290 | case TOK_USER_CLASS283: | |||
291 | parse_class_declaration(cfile, group, 1); | |||
292 | return 1; | |||
293 | ||||
294 | case TOK_DEFAULT_LEASE_TIME280: | |||
295 | parse_lease_time(cfile, &group->default_lease_time); | |||
296 | break; | |||
297 | ||||
298 | case TOK_MAX_LEASE_TIME281: | |||
299 | parse_lease_time(cfile, &group->max_lease_time); | |||
300 | break; | |||
301 | ||||
302 | case TOK_DYNAMIC_BOOTP_LEASE_CUTOFF288: | |||
303 | group->bootp_lease_cutoff = parse_date(cfile); | |||
304 | break; | |||
305 | ||||
306 | case TOK_DYNAMIC_BOOTP_LEASE_LENGTH289: | |||
307 | parse_lease_time(cfile, &group->bootp_lease_length); | |||
308 | break; | |||
309 | ||||
310 | case TOK_BOOT_UNKNOWN_CLIENTS290: | |||
311 | if (type == HOST_DECL1) | |||
312 | parse_warn("boot-unknown-clients not allowed here."); | |||
313 | group->boot_unknown_clients = parse_boolean(cfile); | |||
314 | break; | |||
315 | ||||
316 | case TOK_GET_LEASE_HOSTNAMES295: | |||
317 | if (type == HOST_DECL1) | |||
318 | parse_warn("get-lease-hostnames not allowed here."); | |||
319 | group->get_lease_hostnames = parse_boolean(cfile); | |||
320 | break; | |||
321 | ||||
322 | case TOK_ALWAYS_REPLY_RFC1048335: | |||
323 | group->always_reply_rfc1048 = parse_boolean(cfile); | |||
324 | break; | |||
325 | ||||
326 | case TOK_ECHO_CLIENT_ID337: | |||
327 | group->echo_client_id = parse_boolean(cfile); | |||
328 | break; | |||
329 | ||||
330 | case TOK_USE_HOST_DECL_NAMES296: | |||
331 | if (type == HOST_DECL1) | |||
332 | parse_warn("use-host-decl-names not allowed here."); | |||
333 | group->use_host_decl_names = parse_boolean(cfile); | |||
334 | break; | |||
335 | ||||
336 | case TOK_USE_LEASE_ADDR_FOR_DEFAULT_ROUTE332: | |||
337 | group->use_lease_addr_for_default_route = | |||
338 | parse_boolean(cfile); | |||
339 | break; | |||
340 | ||||
341 | case TOK_TOKEN_NOT334: | |||
342 | token = next_token(&val, cfile); | |||
343 | switch (token) { | |||
344 | case TOK_AUTHORITATIVE333: | |||
345 | if (type == HOST_DECL1) | |||
346 | parse_warn("authority makes no sense here."); | |||
347 | group->authoritative = 0; | |||
348 | parse_semi(cfile); | |||
349 | break; | |||
350 | default: | |||
351 | parse_warn("expecting assertion"); | |||
352 | skip_to_semi(cfile); | |||
353 | break; | |||
354 | } | |||
355 | break; | |||
356 | ||||
357 | case TOK_AUTHORITATIVE333: | |||
358 | if (type == HOST_DECL1) | |||
359 | parse_warn("authority makes no sense here."); | |||
360 | group->authoritative = 1; | |||
361 | parse_semi(cfile); | |||
362 | break; | |||
363 | ||||
364 | case TOK_NEXT_SERVER291: | |||
365 | tree = parse_ip_addr_or_hostname(cfile, 0); | |||
366 | if (!tree) | |||
367 | break; | |||
368 | cache = tree_cache(tree); | |||
369 | if (!tree_evaluate (cache)) | |||
370 | fatalx("next-server is not known"); | |||
371 | group->next_server.len = 4; | |||
372 | memcpy(group->next_server.iabuf, | |||
373 | cache->value, group->next_server.len); | |||
374 | parse_semi(cfile); | |||
375 | break; | |||
376 | ||||
377 | case TOK_OPTION260: | |||
378 | parse_option_param(cfile, group); | |||
379 | break; | |||
380 | ||||
381 | case TOK_SERVER_IDENTIFIER287: | |||
382 | tree = parse_ip_addr_or_hostname(cfile, 0); | |||
383 | if (!tree) | |||
384 | return declaration; | |||
385 | group->options[DHO_DHCP_SERVER_IDENTIFIER54] = tree_cache(tree); | |||
386 | token = next_token(&val, cfile); | |||
387 | break; | |||
388 | ||||
389 | case TOK_FILENAME258: | |||
390 | group->filename = parse_string(cfile); | |||
391 | break; | |||
392 | ||||
393 | case TOK_SERVER_NAME285: | |||
394 | group->server_name = parse_string(cfile); | |||
395 | break; | |||
396 | ||||
397 | case TOK_HARDWARE257: | |||
398 | parse_hardware_param(cfile, &hardware); | |||
399 | if (host_decl) | |||
400 | host_decl->interface = hardware; | |||
401 | else | |||
402 | parse_warn("hardware address parameter %s", | |||
403 | "not allowed here."); | |||
404 | break; | |||
405 | ||||
406 | case TOK_FIXED_ADDR259: | |||
407 | cache = parse_fixed_addr_param(cfile); | |||
408 | if (host_decl) | |||
409 | host_decl->fixed_addr = cache; | |||
410 | else | |||
411 | parse_warn("fixed-address parameter not %s", | |||
412 | "allowed here."); | |||
413 | break; | |||
414 | ||||
415 | case TOK_RANGE272: | |||
416 | if (type != SUBNET_DECL3 || !group->subnet) { | |||
417 | parse_warn("range declaration not allowed here."); | |||
418 | skip_to_semi(cfile); | |||
419 | return declaration; | |||
420 | } | |||
421 | parse_address_range(cfile, group->subnet); | |||
422 | return declaration; | |||
423 | ||||
424 | case TOK_ALLOW310: | |||
425 | parse_allow_deny(cfile, group, 1); | |||
426 | break; | |||
427 | ||||
428 | case TOK_DENY312: | |||
429 | parse_allow_deny(cfile, group, 0); | |||
430 | break; | |||
431 | ||||
432 | default: | |||
433 | if (declaration) | |||
434 | parse_warn("expecting a declaration."); | |||
435 | else | |||
436 | parse_warn("expecting a parameter or declaration."); | |||
437 | skip_to_semi(cfile); | |||
438 | return declaration; | |||
439 | } | |||
440 | ||||
441 | if (declaration) { | |||
442 | parse_warn("parameters not allowed after first declaration."); | |||
443 | return 1; | |||
444 | } | |||
445 | ||||
446 | return 0; | |||
447 | } | |||
448 | ||||
449 | /* | |||
450 | * allow-deny-keyword :== BOOTP | |||
451 | * | BOOTING | |||
452 | * | DYNAMIC_BOOTP | |||
453 | * | UNKNOWN_CLIENTS | |||
454 | */ | |||
455 | void | |||
456 | parse_allow_deny(FILE *cfile, struct group *group, int flag) | |||
457 | { | |||
458 | int token; | |||
459 | char *val; | |||
460 | ||||
461 | token = next_token(&val, cfile); | |||
462 | switch (token) { | |||
463 | case TOK_BOOTP311: | |||
464 | group->allow_bootp = flag; | |||
465 | break; | |||
466 | ||||
467 | case TOK_BOOTING313: | |||
468 | group->allow_booting = flag; | |||
469 | break; | |||
470 | ||||
471 | case TOK_DYNAMIC_BOOTP286: | |||
472 | group->dynamic_bootp = flag; | |||
473 | break; | |||
474 | ||||
475 | case TOK_UNKNOWN_CLIENTS309: | |||
476 | group->boot_unknown_clients = flag; | |||
477 | break; | |||
478 | ||||
479 | default: | |||
480 | parse_warn("expecting allow/deny key"); | |||
481 | skip_to_semi(cfile); | |||
482 | return; | |||
483 | } | |||
484 | parse_semi(cfile); | |||
485 | } | |||
486 | ||||
487 | /* | |||
488 | * boolean :== ON SEMI | OFF SEMI | TRUE SEMI | FALSE SEMI | |||
489 | */ | |||
490 | int | |||
491 | parse_boolean(FILE *cfile) | |||
492 | { | |||
493 | char *val; | |||
494 | int rv; | |||
495 | ||||
496 | next_token(&val, cfile); | |||
497 | if (!strcasecmp (val, "true") || !strcasecmp (val, "on")) | |||
498 | rv = 1; | |||
499 | else if (!strcasecmp (val, "false") || !strcasecmp (val, "off")) | |||
500 | rv = 0; | |||
501 | else { | |||
502 | parse_warn("boolean value (true/false/on/off) expected"); | |||
503 | skip_to_semi(cfile); | |||
504 | return 0; | |||
505 | } | |||
506 | parse_semi(cfile); | |||
507 | return rv; | |||
508 | } | |||
509 | ||||
510 | /* | |||
511 | * Expect a left brace; if there isn't one, skip over the rest of the | |||
512 | * statement and return zero; otherwise, return 1. | |||
513 | */ | |||
514 | int | |||
515 | parse_lbrace(FILE *cfile) | |||
516 | { | |||
517 | int token; | |||
518 | char *val; | |||
519 | ||||
520 | token = next_token(&val, cfile); | |||
521 | if (token != '{') { | |||
522 | parse_warn("expecting left brace."); | |||
523 | skip_to_semi(cfile); | |||
524 | return 0; | |||
525 | } | |||
526 | return 1; | |||
527 | } | |||
528 | ||||
529 | ||||
530 | /* | |||
531 | * host-declaration :== hostname '{' parameters declarations '}' | |||
532 | */ | |||
533 | void | |||
534 | parse_host_declaration(FILE *cfile, struct group *group) | |||
535 | { | |||
536 | char *val; | |||
537 | int token; | |||
538 | struct host_decl *host; | |||
539 | char *name = parse_host_name(cfile); | |||
540 | int declaration = 0; | |||
541 | ||||
542 | if (!name) | |||
543 | return; | |||
544 | ||||
545 | host = calloc(1, sizeof (struct host_decl)); | |||
546 | if (!host) | |||
547 | fatalx("can't allocate host decl struct %s.", name); | |||
548 | ||||
549 | host->name = name; | |||
550 | host->group = clone_group(group, "parse_host_declaration"); | |||
551 | ||||
552 | if (!parse_lbrace(cfile)) { | |||
553 | free(host->name); | |||
554 | free(host->group); | |||
555 | free(host); | |||
556 | return; | |||
557 | } | |||
558 | ||||
559 | do { | |||
560 | token = peek_token(&val, cfile); | |||
561 | if (token == '}') { | |||
562 | token = next_token(&val, cfile); | |||
563 | break; | |||
564 | } | |||
565 | if (token == EOF(-1)) { | |||
566 | token = next_token(&val, cfile); | |||
567 | parse_warn("unexpected end of file"); | |||
568 | break; | |||
569 | } | |||
570 | declaration = parse_statement(cfile, host->group, | |||
571 | HOST_DECL1, host, declaration); | |||
572 | } while (1); | |||
573 | ||||
574 | if (!host->group->options[DHO_HOST_NAME12] && | |||
575 | host->group->use_host_decl_names) { | |||
576 | host->group->options[DHO_HOST_NAME12] = | |||
577 | new_tree_cache("parse_host_declaration"); | |||
578 | if (!host->group->options[DHO_HOST_NAME12]) | |||
579 | fatalx("can't allocate a tree cache for hostname."); | |||
580 | host->group->options[DHO_HOST_NAME12]->len = | |||
581 | strlen(name); | |||
582 | host->group->options[DHO_HOST_NAME12]->value = | |||
583 | (unsigned char *)name; | |||
584 | host->group->options[DHO_HOST_NAME12]->buf_size = | |||
585 | host->group->options[DHO_HOST_NAME12]->len; | |||
586 | host->group->options[DHO_HOST_NAME12]->timeout = -1; | |||
587 | host->group->options[DHO_HOST_NAME12]->tree = | |||
588 | NULL((void *)0); | |||
589 | } | |||
590 | ||||
591 | enter_host(host); | |||
592 | } | |||
593 | ||||
594 | /* | |||
595 | * class-declaration :== STRING '{' parameters declarations '}' | |||
596 | */ | |||
597 | void | |||
598 | parse_class_declaration(FILE *cfile, struct group *group, int type) | |||
599 | { | |||
600 | char *val; | |||
601 | int token; | |||
602 | struct class *class; | |||
603 | int declaration = 0; | |||
604 | ||||
605 | token = next_token(&val, cfile); | |||
606 | if (token != TOK_STRING262) { | |||
607 | parse_warn("Expecting class name"); | |||
608 | skip_to_semi(cfile); | |||
609 | return; | |||
610 | } | |||
611 | ||||
612 | class = add_class (type, val); | |||
613 | if (!class) | |||
614 | fatalx("No memory for class %s.", val); | |||
615 | class->group = clone_group(group, "parse_class_declaration"); | |||
616 | ||||
617 | if (!parse_lbrace(cfile)) { | |||
618 | free(class->name); | |||
619 | free(class->group); | |||
620 | free(class); | |||
621 | return; | |||
622 | } | |||
623 | ||||
624 | do { | |||
625 | token = peek_token(&val, cfile); | |||
626 | if (token == '}') { | |||
627 | token = next_token(&val, cfile); | |||
628 | break; | |||
629 | } else if (token == EOF(-1)) { | |||
630 | token = next_token(&val, cfile); | |||
631 | parse_warn("unexpected end of file"); | |||
632 | break; | |||
633 | } else { | |||
634 | declaration = parse_statement(cfile, class->group, | |||
635 | CLASS_DECL4, NULL((void *)0), declaration); | |||
636 | } | |||
637 | } while (1); | |||
638 | } | |||
639 | ||||
640 | /* | |||
641 | * shared-network-declaration :== | |||
642 | * hostname LBRACE declarations parameters RBRACE | |||
643 | */ | |||
644 | void | |||
645 | parse_shared_net_declaration(FILE *cfile, struct group *group) | |||
646 | { | |||
647 | char *val; | |||
648 | int token; | |||
649 | struct shared_network *share; | |||
650 | char *name; | |||
651 | int declaration = 0; | |||
652 | ||||
653 | share = calloc(1, sizeof(struct shared_network)); | |||
654 | if (!share) | |||
655 | fatalx("No memory for shared subnet"); | |||
656 | share->leases = NULL((void *)0); | |||
657 | share->last_lease = NULL((void *)0); | |||
658 | share->insertion_point = NULL((void *)0); | |||
659 | share->next = NULL((void *)0); | |||
660 | share->interface = NULL((void *)0); | |||
661 | share->group = clone_group(group, "parse_shared_net_declaration"); | |||
662 | share->group->shared_network = share; | |||
663 | ||||
664 | /* Get the name of the shared network. */ | |||
665 | token = peek_token(&val, cfile); | |||
666 | if (token == TOK_STRING262) { | |||
667 | token = next_token(&val, cfile); | |||
668 | ||||
669 | if (val[0] == 0) { | |||
670 | parse_warn("zero-length shared network name"); | |||
671 | val = "<no-name-given>"; | |||
672 | } | |||
673 | name = strdup(val); | |||
674 | if (name == NULL((void *)0)) | |||
675 | fatalx("no memory for shared network name"); | |||
676 | } else { | |||
677 | name = parse_host_name(cfile); | |||
678 | if (!name) { | |||
679 | free(share->group); | |||
680 | free(share); | |||
681 | return; | |||
682 | } | |||
683 | } | |||
684 | share->name = name; | |||
685 | ||||
686 | if (!parse_lbrace(cfile)) { | |||
687 | free(share->group); | |||
688 | free(share->name); | |||
689 | free(share); | |||
690 | return; | |||
691 | } | |||
692 | ||||
693 | do { | |||
694 | token = peek_token(&val, cfile); | |||
695 | if (token == '}') { | |||
696 | token = next_token(&val, cfile); | |||
697 | if (!share->subnets) { | |||
698 | free(share->group); | |||
699 | free(share->name); | |||
700 | free(share); | |||
701 | parse_warn("empty shared-network decl"); | |||
702 | return; | |||
703 | } | |||
704 | enter_shared_network(share); | |||
705 | return; | |||
706 | } else if (token == EOF(-1)) { | |||
707 | token = next_token(&val, cfile); | |||
708 | parse_warn("unexpected end of file"); | |||
709 | break; | |||
710 | } | |||
711 | ||||
712 | declaration = parse_statement(cfile, share->group, | |||
713 | SHARED_NET_DECL2, NULL((void *)0), declaration); | |||
714 | } while (1); | |||
715 | } | |||
716 | ||||
717 | /* | |||
718 | * subnet-declaration :== | |||
719 | * net NETMASK netmask RBRACE parameters declarations LBRACE | |||
720 | */ | |||
721 | void | |||
722 | parse_subnet_declaration(FILE *cfile, struct shared_network *share) | |||
723 | { | |||
724 | char *val; | |||
725 | int token; | |||
726 | struct subnet *subnet, *t, *u; | |||
727 | struct iaddr iaddr; | |||
728 | unsigned char addr[4]; | |||
729 | int len = sizeof addr; | |||
730 | int declaration = 0; | |||
731 | ||||
732 | subnet = calloc(1, sizeof(struct subnet)); | |||
733 | if (!subnet) | |||
734 | fatalx("No memory for new subnet"); | |||
735 | subnet->shared_network = share; | |||
736 | subnet->group = clone_group(share->group, "parse_subnet_declaration"); | |||
737 | subnet->group->subnet = subnet; | |||
738 | ||||
739 | /* Get the network number. */ | |||
740 | if (!parse_numeric_aggregate(cfile, addr, &len, '.', 10, 8)) { | |||
741 | free(subnet->group); | |||
742 | free(subnet); | |||
743 | return; | |||
744 | } | |||
745 | memcpy(iaddr.iabuf, addr, len); | |||
746 | iaddr.len = len; | |||
747 | subnet->net = iaddr; | |||
748 | ||||
749 | token = next_token(&val, cfile); | |||
750 | if (token != TOK_NETMASK279) { | |||
751 | free(subnet->group); | |||
752 | free(subnet); | |||
753 | parse_warn("Expecting netmask"); | |||
754 | skip_to_semi(cfile); | |||
755 | return; | |||
756 | } | |||
757 | ||||
758 | /* Get the netmask. */ | |||
759 | if (!parse_numeric_aggregate(cfile, addr, &len, '.', 10, 8)) { | |||
760 | free(subnet->group); | |||
761 | free(subnet); | |||
762 | return; | |||
763 | } | |||
764 | memcpy(iaddr.iabuf, addr, len); | |||
765 | iaddr.len = len; | |||
766 | subnet->netmask = iaddr; | |||
767 | ||||
768 | /* Save only the subnet number. */ | |||
769 | subnet->net = subnet_number(subnet->net, subnet->netmask); | |||
770 | ||||
771 | enter_subnet(subnet); | |||
772 | ||||
773 | if (!parse_lbrace(cfile)) | |||
774 | return; | |||
775 | ||||
776 | do { | |||
777 | token = peek_token(&val, cfile); | |||
778 | if (token == '}') { | |||
779 | token = next_token(&val, cfile); | |||
780 | break; | |||
781 | } else if (token == EOF(-1)) { | |||
782 | token = next_token(&val, cfile); | |||
783 | parse_warn("unexpected end of file"); | |||
784 | break; | |||
785 | } | |||
786 | declaration = parse_statement(cfile, subnet->group, | |||
787 | SUBNET_DECL3, NULL((void *)0), declaration); | |||
788 | } while (1); | |||
789 | ||||
790 | /* | |||
791 | * If this subnet supports dynamic bootp, flag it so in the | |||
792 | * shared_network containing it. | |||
793 | */ | |||
794 | if (subnet->group->dynamic_bootp) | |||
795 | share->group->dynamic_bootp = 1; | |||
796 | ||||
797 | /* Add the subnet to the list of subnets in this shared net. */ | |||
798 | if (!share->subnets) | |||
799 | share->subnets = subnet; | |||
800 | else { | |||
801 | u = NULL((void *)0); | |||
802 | for (t = share->subnets; t; t = t->next_sibling) { | |||
803 | if (subnet_inner_than(subnet, t, 0)) { | |||
804 | if (u) | |||
805 | u->next_sibling = subnet; | |||
806 | else | |||
807 | share->subnets = subnet; | |||
808 | subnet->next_sibling = t; | |||
809 | return; | |||
810 | } | |||
811 | u = t; | |||
812 | } | |||
813 | u->next_sibling = subnet; | |||
814 | } | |||
815 | } | |||
816 | ||||
817 | /* | |||
818 | * group-declaration :== RBRACE parameters declarations LBRACE | |||
819 | */ | |||
820 | void | |||
821 | parse_group_declaration(FILE *cfile, struct group *group) | |||
822 | { | |||
823 | char *val; | |||
824 | int token; | |||
825 | struct group *g; | |||
826 | int declaration = 0; | |||
827 | ||||
828 | g = clone_group(group, "parse_group_declaration"); | |||
829 | ||||
830 | if (!parse_lbrace(cfile)) { | |||
831 | free(g); | |||
832 | return; | |||
833 | } | |||
834 | ||||
835 | do { | |||
836 | token = peek_token(&val, cfile); | |||
837 | if (token == '}') { | |||
838 | token = next_token(&val, cfile); | |||
839 | break; | |||
840 | } else if (token == EOF(-1)) { | |||
841 | token = next_token(&val, cfile); | |||
842 | parse_warn("unexpected end of file"); | |||
843 | break; | |||
844 | } | |||
845 | declaration = parse_statement(cfile, g, GROUP_DECL5, NULL((void *)0), | |||
846 | declaration); | |||
847 | } while (1); | |||
848 | } | |||
849 | ||||
850 | /* | |||
851 | * cidr :== ip-address "/" bit-count | |||
852 | * ip-address :== NUMBER [ DOT NUMBER [ DOT NUMBER [ DOT NUMBER ] ] ] | |||
853 | * bit-count :== 0..32 | |||
854 | */ | |||
855 | int | |||
856 | parse_cidr(FILE *cfile, unsigned char *subnet, unsigned char *subnetlen) | |||
857 | { | |||
858 | uint8_t cidr[5]; | |||
859 | const char *errstr; | |||
860 | char *val; | |||
861 | long long numval; | |||
862 | unsigned int i; | |||
863 | int token; | |||
864 | ||||
865 | memset(cidr, 0, sizeof(cidr)); | |||
866 | i = 1; /* Last four octets hold subnet, first octet the # of bits. */ | |||
867 | do { | |||
868 | token = next_token(&val, cfile); | |||
869 | if (i == 0) | |||
870 | numval = strtonum(val, 0, 32, &errstr); | |||
871 | else | |||
872 | numval = strtonum(val, 0, UINT8_MAX0xff, &errstr); | |||
873 | if (errstr != NULL((void *)0)) | |||
874 | break; | |||
875 | cidr[i++] = numval; | |||
876 | if (i == 1) { | |||
877 | memcpy(subnet, &cidr[1], 4); /* XXX Need cidr_t */ | |||
878 | *subnetlen = cidr[0]; | |||
879 | return 1; | |||
880 | } | |||
881 | token = next_token(NULL((void *)0), cfile); | |||
882 | if (token == '/') | |||
883 | i = 0; | |||
884 | if (i == sizeof(cidr)) | |||
885 | break; | |||
886 | } while (token == '.' || token == '/'); | |||
887 | ||||
888 | parse_warn("expecting IPv4 CIDR block."); | |||
889 | ||||
890 | if (token != ';') | |||
891 | skip_to_semi(cfile); | |||
892 | return 0; | |||
893 | } | |||
894 | ||||
895 | /* | |||
896 | * ip-addr-or-hostname :== ip-address | hostname | |||
897 | * ip-address :== NUMBER DOT NUMBER DOT NUMBER DOT NUMBER | |||
898 | * | |||
899 | * Parse an ip address or a hostname. If uniform is zero, put in | |||
900 | * a TREE_LIMIT node to catch hostnames that evaluate to more than | |||
901 | * one IP address. | |||
902 | */ | |||
903 | struct tree * | |||
904 | parse_ip_addr_or_hostname(FILE *cfile, int uniform) | |||
905 | { | |||
906 | char *val; | |||
907 | int token; | |||
908 | unsigned char addr[4]; | |||
909 | int len = sizeof addr; | |||
910 | char *name; | |||
911 | struct tree *rv; | |||
912 | struct hostent *h; | |||
913 | ||||
914 | name = NULL((void *)0); | |||
915 | h = NULL((void *)0); | |||
916 | ||||
917 | token = peek_token(&val, cfile); | |||
918 | if (is_identifier(token)((token) >= 256 && (token) != 262 && (token ) != 263 && (token) != (-1))) { | |||
919 | name = parse_host_name(cfile); | |||
920 | if (name) | |||
921 | h = gethostbyname(name); | |||
922 | if (name && h) { | |||
923 | rv = tree_const(h->h_addr_list[0], h->h_length); | |||
924 | if (!uniform) | |||
925 | rv = tree_limit(rv, 4); | |||
926 | return rv; | |||
927 | } | |||
928 | } | |||
929 | ||||
930 | if (token == TOK_NUMBER_OR_NAME264) { | |||
931 | if (!parse_numeric_aggregate(cfile, addr, &len, '.', 10, 8)) { | |||
932 | parse_warn("%s (%d): expecting IP address or hostname", | |||
933 | val, token); | |||
934 | return NULL((void *)0); | |||
935 | } | |||
936 | rv = tree_const(addr, len); | |||
937 | } else { | |||
938 | if (token != '{' && token != '}') | |||
939 | token = next_token(&val, cfile); | |||
940 | parse_warn("%s (%d): expecting IP address or hostname", | |||
941 | val, token); | |||
942 | if (token != ';') | |||
943 | skip_to_semi(cfile); | |||
944 | return NULL((void *)0); | |||
945 | } | |||
946 | ||||
947 | return rv; | |||
948 | } | |||
949 | ||||
950 | ||||
951 | /* | |||
952 | * fixed-addr-parameter :== ip-addrs-or-hostnames SEMI | |||
953 | * ip-addrs-or-hostnames :== ip-addr-or-hostname | |||
954 | * | ip-addrs-or-hostnames ip-addr-or-hostname | |||
955 | */ | |||
956 | struct tree_cache * | |||
957 | parse_fixed_addr_param(FILE *cfile) | |||
958 | { | |||
959 | char *val; | |||
960 | int token; | |||
961 | struct tree *tree = NULL((void *)0); | |||
962 | struct tree *tmp; | |||
963 | ||||
964 | do { | |||
965 | tmp = parse_ip_addr_or_hostname(cfile, 0); | |||
966 | if (tree) | |||
967 | tree = tree_concat(tree, tmp); | |||
968 | else | |||
969 | tree = tmp; | |||
970 | token = peek_token(&val, cfile); | |||
971 | if (token == ',') | |||
972 | token = next_token(&val, cfile); | |||
973 | } while (token == ','); | |||
974 | ||||
975 | if (!parse_semi(cfile)) | |||
976 | return NULL((void *)0); | |||
977 | return tree_cache(tree); | |||
978 | } | |||
979 | ||||
980 | /* | |||
981 | * option_parameter :== identifier DOT identifier <syntax> SEMI | |||
982 | * | identifier <syntax> SEMI | |||
983 | * | |||
984 | * Option syntax is handled specially through format strings, so it | |||
985 | * would be painful to come up with BNF for it. However, it always | |||
986 | * starts as above and ends in a SEMI. | |||
987 | */ | |||
988 | void | |||
989 | parse_option_param(FILE *cfile, struct group *group) | |||
990 | { | |||
991 | char *val; | |||
992 | int token; | |||
993 | unsigned char buf[4]; | |||
994 | unsigned char cprefix; | |||
995 | char *vendor; | |||
996 | char *fmt; | |||
997 | struct universe *universe; | |||
998 | struct option *option; | |||
999 | struct tree *tree = NULL((void *)0); | |||
1000 | struct tree *t; | |||
1001 | ||||
1002 | token = next_token(&val, cfile); | |||
1003 | if (!is_identifier(token)((token) >= 256 && (token) != 262 && (token ) != 263 && (token) != (-1))) { | |||
1004 | parse_warn("expecting identifier after option keyword."); | |||
1005 | if (token != ';') | |||
1006 | skip_to_semi(cfile); | |||
1007 | return; | |||
1008 | } | |||
1009 | vendor = strdup(val); | |||
1010 | if (vendor == NULL((void *)0)) | |||
1011 | fatalx("no memory for vendor token."); | |||
1012 | token = peek_token(&val, cfile); | |||
1013 | if (token == '.') { | |||
1014 | /* Go ahead and take the DOT token. */ | |||
1015 | token = next_token(&val, cfile); | |||
1016 | ||||
1017 | /* The next token should be an identifier. */ | |||
1018 | token = next_token(&val, cfile); | |||
1019 | if (!is_identifier(token)((token) >= 256 && (token) != 262 && (token ) != 263 && (token) != (-1))) { | |||
1020 | parse_warn("expecting identifier after '.'"); | |||
1021 | if (token != ';') | |||
1022 | skip_to_semi(cfile); | |||
1023 | free(vendor); | |||
1024 | return; | |||
1025 | } | |||
1026 | ||||
1027 | /* | |||
1028 | * Look up the option name hash table for the specified | |||
1029 | * vendor. | |||
1030 | */ | |||
1031 | universe = ((struct universe *)hash_lookup(&universe_hash, | |||
1032 | (unsigned char *)vendor, 0)); | |||
1033 | /* | |||
1034 | * If it's not there, we can't parse the rest of the | |||
1035 | * declaration. | |||
1036 | */ | |||
1037 | if (!universe) { | |||
1038 | parse_warn("no vendor named %s.", vendor); | |||
1039 | skip_to_semi(cfile); | |||
1040 | free(vendor); | |||
1041 | return; | |||
1042 | } | |||
1043 | } else { | |||
1044 | /* | |||
1045 | * Use the default hash table, which contains all the | |||
1046 | * standard dhcp option names. | |||
1047 | */ | |||
1048 | val = vendor; | |||
1049 | universe = &dhcp_universe; | |||
1050 | } | |||
1051 | ||||
1052 | /* Look up the actual option info. */ | |||
1053 | option = (struct option *)hash_lookup(universe->hash, | |||
1054 | (unsigned char *)val, 0); | |||
1055 | ||||
1056 | /* If we didn't get an option structure, it's an undefined option. */ | |||
1057 | if (!option) { | |||
1058 | if (val == vendor) | |||
1059 | parse_warn("no option named %s", val); | |||
1060 | else | |||
1061 | parse_warn("no option named %s for vendor %s", | |||
1062 | val, vendor); | |||
1063 | skip_to_semi(cfile); | |||
1064 | free(vendor); | |||
1065 | return; | |||
1066 | } | |||
1067 | ||||
1068 | /* Free the initial identifier token. */ | |||
1069 | free(vendor); | |||
1070 | ||||
1071 | /* Parse the option data. */ | |||
1072 | do { | |||
1073 | /* | |||
1074 | * Set a flag if this is an array of a simple type (i.e., | |||
1075 | * not an array of pairs of IP addresses, or something | |||
1076 | * like that. | |||
1077 | */ | |||
1078 | int uniform = option->format[1] == 'A'; | |||
1079 | ||||
1080 | for (fmt = option->format; *fmt; fmt++) { | |||
1081 | if (*fmt == 'A') | |||
1082 | break; | |||
1083 | switch (*fmt) { | |||
1084 | case 'X': | |||
1085 | token = peek_token(&val, cfile); | |||
1086 | if (token == TOK_NUMBER_OR_NAME264) { | |||
1087 | do { | |||
1088 | token = next_token | |||
1089 | (&val, cfile); | |||
1090 | if (token != | |||
1091 | TOK_NUMBER_OR_NAME264) { | |||
1092 | parse_warn("expecting " | |||
1093 | "hex number."); | |||
1094 | if (token != ';') | |||
1095 | skip_to_semi( | |||
1096 | cfile); | |||
1097 | return; | |||
1098 | } | |||
1099 | convert_num(buf, val, 16, 8); | |||
1100 | tree = tree_concat(tree, | |||
1101 | tree_const(buf, 1)); | |||
1102 | token = peek_token(&val, | |||
1103 | cfile); | |||
1104 | if (token == ':') | |||
1105 | token = | |||
1106 | next_token(&val, | |||
1107 | cfile); | |||
1108 | } while (token == ':'); | |||
1109 | } else if (token == TOK_STRING262) { | |||
1110 | token = next_token(&val, cfile); | |||
1111 | tree = tree_concat(tree, | |||
1112 | tree_const((unsigned char *)val, | |||
1113 | strlen(val))); | |||
1114 | } else { | |||
1115 | parse_warn("expecting string %s.", | |||
1116 | "or hexadecimal data"); | |||
1117 | skip_to_semi(cfile); | |||
1118 | return; | |||
1119 | } | |||
1120 | break; | |||
1121 | ||||
1122 | case 't': /* Text string. */ | |||
1123 | token = next_token(&val, cfile); | |||
1124 | if (token != TOK_STRING262 | |||
1125 | && !is_identifier(token)((token) >= 256 && (token) != 262 && (token ) != 263 && (token) != (-1))) { | |||
1126 | parse_warn("expecting string."); | |||
1127 | if (token != ';') | |||
1128 | skip_to_semi(cfile); | |||
1129 | return; | |||
1130 | } | |||
1131 | tree = tree_concat(tree, | |||
1132 | tree_const((unsigned char *)val, | |||
1133 | strlen(val))); | |||
1134 | break; | |||
1135 | ||||
1136 | case 'I': /* IP address or hostname. */ | |||
1137 | t = parse_ip_addr_or_hostname(cfile, uniform); | |||
1138 | if (!t) | |||
1139 | return; | |||
1140 | tree = tree_concat(tree, t); | |||
1141 | break; | |||
1142 | ||||
1143 | case 'L': /* Unsigned 32-bit integer. */ | |||
1144 | case 'l': /* Signed 32-bit integer. */ | |||
1145 | token = next_token(&val, cfile); | |||
1146 | if (token != TOK_NUMBER263 && token != | |||
1147 | TOK_NUMBER_OR_NAME264) { | |||
1148 | parse_warn("expecting number."); | |||
1149 | if (token != ';') | |||
1150 | skip_to_semi(cfile); | |||
1151 | return; | |||
1152 | } | |||
1153 | convert_num(buf, val, 0, 32); | |||
1154 | tree = tree_concat(tree, tree_const(buf, 4)); | |||
1155 | break; | |||
1156 | case 's': /* Signed 16-bit integer. */ | |||
1157 | case 'S': /* Unsigned 16-bit integer. */ | |||
1158 | token = next_token(&val, cfile); | |||
1159 | if (token != TOK_NUMBER263 && token != | |||
1160 | TOK_NUMBER_OR_NAME264) { | |||
1161 | parse_warn("expecting number."); | |||
1162 | if (token != ';') | |||
1163 | skip_to_semi(cfile); | |||
1164 | return; | |||
1165 | } | |||
1166 | convert_num(buf, val, 0, 16); | |||
1167 | tree = tree_concat(tree, tree_const(buf, 2)); | |||
1168 | break; | |||
1169 | case 'b': /* Signed 8-bit integer. */ | |||
1170 | case 'B': /* Unsigned 8-bit integer. */ | |||
1171 | token = next_token(&val, cfile); | |||
1172 | if (token != TOK_NUMBER263 && token != | |||
1173 | TOK_NUMBER_OR_NAME264) { | |||
1174 | parse_warn("expecting number."); | |||
1175 | if (token != ';') | |||
1176 | skip_to_semi(cfile); | |||
1177 | return; | |||
1178 | } | |||
1179 | convert_num(buf, val, 0, 8); | |||
1180 | tree = tree_concat(tree, tree_const(buf, 1)); | |||
1181 | break; | |||
1182 | case 'f': /* Boolean flag. */ | |||
1183 | token = next_token(&val, cfile); | |||
1184 | if (!is_identifier(token)((token) >= 256 && (token) != 262 && (token ) != 263 && (token) != (-1))) { | |||
1185 | parse_warn("expecting identifier."); | |||
1186 | if (token != ';') | |||
1187 | skip_to_semi(cfile); | |||
1188 | return; | |||
1189 | } | |||
1190 | if (!strcasecmp(val, "true") | |||
1191 | || !strcasecmp(val, "on")) | |||
1192 | buf[0] = 1; | |||
1193 | else if (!strcasecmp(val, "false") | |||
1194 | || !strcasecmp(val, "off")) | |||
1195 | buf[0] = 0; | |||
1196 | else { | |||
1197 | parse_warn("expecting boolean."); | |||
1198 | if (token != ';') | |||
1199 | skip_to_semi(cfile); | |||
1200 | return; | |||
1201 | } | |||
1202 | tree = tree_concat(tree, tree_const(buf, 1)); | |||
1203 | break; | |||
1204 | case 'C': | |||
1205 | if (!parse_cidr(cfile, buf, &cprefix)) | |||
1206 | return; | |||
1207 | tree = tree_concat(tree, tree_const(&cprefix, | |||
1208 | sizeof(cprefix))); | |||
1209 | if (cprefix > 0) | |||
1210 | tree = tree_concat(tree, tree_const( | |||
1211 | buf, (cprefix + 7) / 8)); | |||
1212 | break; | |||
1213 | case 'D': | |||
1214 | t = parse_domain_and_comp(cfile); | |||
1215 | if (!t) | |||
1216 | return; | |||
1217 | tree = tree_concat(tree, t); | |||
1218 | break; | |||
1219 | default: | |||
1220 | log_warnx("Bad format %c in " | |||
1221 | "parse_option_param.", *fmt); | |||
1222 | skip_to_semi(cfile); | |||
1223 | return; | |||
1224 | } | |||
1225 | } | |||
1226 | if (*fmt == 'A') { | |||
1227 | token = peek_token(&val, cfile); | |||
1228 | if (token == ',') { | |||
1229 | token = next_token(&val, cfile); | |||
1230 | continue; | |||
1231 | } | |||
1232 | break; | |||
1233 | } | |||
1234 | } while (*fmt == 'A'); | |||
1235 | ||||
1236 | token = next_token(&val, cfile); | |||
1237 | if (token != ';') { | |||
1238 | parse_warn("semicolon expected."); | |||
1239 | skip_to_semi(cfile); | |||
1240 | return; | |||
1241 | } | |||
1242 | group->options[option->code] = tree_cache(tree); | |||
1243 | } | |||
1244 | ||||
1245 | /* | |||
1246 | * lease_declaration :== LEASE ip_address LBRACE lease_parameters RBRACE | |||
1247 | * | |||
1248 | * lease_parameters :== <nil> | |||
1249 | * | lease_parameter | |||
1250 | * | lease_parameters lease_parameter | |||
1251 | * | |||
1252 | * lease_parameter :== STARTS date | |||
1253 | * | ENDS date | |||
1254 | * | TIMESTAMP date | |||
1255 | * | HARDWARE hardware-parameter | |||
1256 | * | UID hex_numbers SEMI | |||
1257 | * | HOSTNAME hostname SEMI | |||
1258 | * | CLIENT_HOSTNAME hostname SEMI | |||
1259 | * | CLASS identifier SEMI | |||
1260 | * | DYNAMIC_BOOTP SEMI | |||
1261 | */ | |||
1262 | struct lease * | |||
1263 | parse_lease_declaration(FILE *cfile) | |||
1264 | { | |||
1265 | char *val; | |||
1266 | int token; | |||
1267 | unsigned char addr[4]; | |||
1268 | int len = sizeof addr; | |||
1269 | int seenmask = 0; | |||
1270 | int seenbit; | |||
1271 | char tbuf[32]; | |||
1272 | static struct lease lease; | |||
1273 | ||||
1274 | /* Zap the lease structure. */ | |||
1275 | memset(&lease, 0, sizeof lease); | |||
1276 | ||||
1277 | /* Get the address for which the lease has been issued. */ | |||
1278 | if (!parse_numeric_aggregate(cfile, addr, &len, '.', 10, 8)) | |||
1279 | return NULL((void *)0); | |||
1280 | memcpy(lease.ip_addr.iabuf, addr, len); | |||
1281 | lease.ip_addr.len = len; | |||
1282 | ||||
1283 | if (!parse_lbrace(cfile)) | |||
1284 | return NULL((void *)0); | |||
1285 | ||||
1286 | do { | |||
1287 | token = next_token(&val, cfile); | |||
1288 | if (token == '}') | |||
1289 | break; | |||
1290 | else if (token == EOF(-1)) { | |||
1291 | parse_warn("unexpected end of file"); | |||
1292 | break; | |||
1293 | } | |||
1294 | strlcpy(tbuf, val, sizeof tbuf); | |||
1295 | ||||
1296 | /* Parse any of the times associated with the lease. */ | |||
1297 | if (token == TOK_STARTS267 || token == TOK_ENDS268 || token == | |||
1298 | TOK_TIMESTAMP266) { | |||
1299 | time_t t; | |||
1300 | t = parse_date(cfile); | |||
1301 | switch (token) { | |||
1302 | case TOK_STARTS267: | |||
1303 | seenbit = 1; | |||
1304 | lease.starts = t; | |||
1305 | break; | |||
1306 | ||||
1307 | case TOK_ENDS268: | |||
1308 | seenbit = 2; | |||
1309 | lease.ends = t; | |||
1310 | break; | |||
1311 | ||||
1312 | case TOK_TIMESTAMP266: | |||
1313 | seenbit = 4; | |||
1314 | lease.timestamp = t; | |||
1315 | break; | |||
1316 | ||||
1317 | default: | |||
1318 | /*NOTREACHED*/ | |||
1319 | seenbit = 0; | |||
1320 | break; | |||
1321 | } | |||
1322 | } else { | |||
1323 | switch (token) { | |||
1324 | /* Colon-separated hexadecimal octets. */ | |||
1325 | case TOK_UID269: | |||
1326 | seenbit = 8; | |||
1327 | token = peek_token(&val, cfile); | |||
1328 | if (token == TOK_STRING262) { | |||
1329 | token = next_token(&val, cfile); | |||
1330 | lease.uid_len = strlen(val); | |||
1331 | lease.uid = malloc(lease.uid_len); | |||
1332 | if (!lease.uid) { | |||
1333 | log_warnx("no space for uid"); | |||
1334 | return NULL((void *)0); | |||
1335 | } | |||
1336 | memcpy(lease.uid, val, lease.uid_len); | |||
| ||||
1337 | parse_semi(cfile); | |||
1338 | } else { | |||
1339 | lease.uid_len = 0; | |||
1340 | lease.uid = | |||
1341 | parse_numeric_aggregate(cfile, | |||
1342 | NULL((void *)0), &lease.uid_len, ':', 16, 8); | |||
1343 | if (!lease.uid) { | |||
1344 | log_warnx("no space for uid"); | |||
1345 | return NULL((void *)0); | |||
1346 | } | |||
1347 | if (lease.uid_len == 0) { | |||
1348 | lease.uid = NULL((void *)0); | |||
1349 | parse_warn("zero-length uid"); | |||
1350 | seenbit = 0; | |||
1351 | break; | |||
1352 | } | |||
1353 | } | |||
1354 | if (!lease.uid
| |||
1355 | fatalx("No memory for lease uid"); | |||
1356 | break; | |||
1357 | ||||
1358 | case TOK_CLASS270: | |||
1359 | seenbit = 32; | |||
1360 | token = next_token(&val, cfile); | |||
1361 | if (!is_identifier(token)((token) >= 256 && (token) != 262 && (token ) != 263 && (token) != (-1))) { | |||
1362 | if (token != ';') | |||
1363 | skip_to_semi(cfile); | |||
1364 | return NULL((void *)0); | |||
1365 | } | |||
1366 | /* for now, we aren't using this. */ | |||
1367 | break; | |||
1368 | ||||
1369 | case TOK_HARDWARE257: | |||
1370 | seenbit = 64; | |||
1371 | parse_hardware_param(cfile, | |||
1372 | &lease.hardware_addr); | |||
1373 | break; | |||
1374 | ||||
1375 | case TOK_DYNAMIC_BOOTP286: | |||
1376 | seenbit = 128; | |||
1377 | lease.flags |= BOOTP_LEASE2; | |||
1378 | break; | |||
1379 | ||||
1380 | case TOK_ABANDONED319: | |||
1381 | seenbit = 256; | |||
1382 | lease.flags |= ABANDONED_LEASE16; | |||
1383 | break; | |||
1384 | ||||
1385 | case TOK_HOSTNAME328: | |||
1386 | seenbit = 512; | |||
1387 | token = peek_token(&val, cfile); | |||
1388 | if (token == TOK_STRING262) | |||
1389 | lease.hostname = parse_string(cfile); | |||
1390 | else | |||
1391 | lease.hostname = | |||
1392 | parse_host_name(cfile); | |||
1393 | if (!lease.hostname) { | |||
1394 | seenbit = 0; | |||
1395 | return NULL((void *)0); | |||
1396 | } | |||
1397 | break; | |||
1398 | ||||
1399 | case TOK_CLIENT_HOSTNAME329: | |||
1400 | seenbit = 1024; | |||
1401 | token = peek_token(&val, cfile); | |||
1402 | if (token == TOK_STRING262) | |||
1403 | lease.client_hostname = | |||
1404 | parse_string(cfile); | |||
1405 | else | |||
1406 | lease.client_hostname = | |||
1407 | parse_host_name(cfile); | |||
1408 | break; | |||
1409 | ||||
1410 | default: | |||
1411 | skip_to_semi(cfile); | |||
1412 | seenbit = 0; | |||
1413 | return NULL((void *)0); | |||
1414 | } | |||
1415 | ||||
1416 | if (token != TOK_HARDWARE257 && token != TOK_STRING262) { | |||
1417 | token = next_token(&val, cfile); | |||
1418 | if (token != ';') { | |||
1419 | parse_warn("semicolon expected."); | |||
1420 | skip_to_semi(cfile); | |||
1421 | return NULL((void *)0); | |||
1422 | } | |||
1423 | } | |||
1424 | } | |||
1425 | if (seenmask & seenbit) { | |||
1426 | parse_warn("Too many %s parameters in lease %s\n", | |||
1427 | tbuf, piaddr(lease.ip_addr)); | |||
1428 | } else | |||
1429 | seenmask |= seenbit; | |||
1430 | ||||
1431 | } while (1); | |||
1432 | return &lease; | |||
1433 | } | |||
1434 | ||||
1435 | /* | |||
1436 | * address-range-declaration :== ip-address ip-address SEMI | |||
1437 | * | DYNAMIC_BOOTP ip-address ip-address SEMI | |||
1438 | */ | |||
1439 | void | |||
1440 | parse_address_range(FILE *cfile, struct subnet *subnet) | |||
1441 | { | |||
1442 | struct iaddr low, high; | |||
1443 | unsigned char addr[4]; | |||
1444 | int len = sizeof addr, token, dynamic = 0; | |||
1445 | char *val; | |||
1446 | ||||
1447 | if ((token = peek_token(&val, cfile)) == TOK_DYNAMIC_BOOTP286) { | |||
1448 | token = next_token(&val, cfile); | |||
1449 | subnet->group->dynamic_bootp = dynamic = 1; | |||
1450 | } | |||
1451 | ||||
1452 | /* Get the bottom address in the range. */ | |||
1453 | if (!parse_numeric_aggregate(cfile, addr, &len, '.', 10, 8)) | |||
1454 | return; | |||
1455 | memcpy(low.iabuf, addr, len); | |||
1456 | low.len = len; | |||
1457 | ||||
1458 | /* Only one address? */ | |||
1459 | token = peek_token(&val, cfile); | |||
1460 | if (token == ';') | |||
1461 | high = low; | |||
1462 | else { | |||
1463 | /* Get the top address in the range. */ | |||
1464 | if (!parse_numeric_aggregate(cfile, addr, &len, '.', 10, 8)) | |||
1465 | return; | |||
1466 | memcpy(high.iabuf, addr, len); | |||
1467 | high.len = len; | |||
1468 | } | |||
1469 | ||||
1470 | token = next_token(&val, cfile); | |||
1471 | if (token != ';') { | |||
1472 | parse_warn("semicolon expected."); | |||
1473 | skip_to_semi(cfile); | |||
1474 | return; | |||
1475 | } | |||
1476 | ||||
1477 | /* Create the new address range. */ | |||
1478 | new_address_range(low, high, subnet, dynamic); | |||
1479 | } | |||
1480 | ||||
1481 | static void | |||
1482 | push_domain_list(char ***domains, size_t *count, char *domain) | |||
1483 | { | |||
1484 | *domains = reallocarray(*domains, *count + 1, sizeof **domains); | |||
1485 | if (!*domains) | |||
1486 | fatalx("Can't allocate domain list"); | |||
1487 | ||||
1488 | (*domains)[*count] = domain; | |||
1489 | ++*count; | |||
1490 | } | |||
1491 | ||||
1492 | static void | |||
1493 | free_domain_list(char **domains, size_t count) | |||
1494 | { | |||
1495 | size_t i; | |||
1496 | ||||
1497 | for (i = 0; i < count; i++) | |||
1498 | free(domains[i]); | |||
1499 | free(domains); | |||
1500 | } | |||
1501 | ||||
1502 | struct tree * | |||
1503 | parse_domain_and_comp(FILE *cfile) | |||
1504 | { | |||
1505 | struct tree *rv = NULL((void *)0); | |||
1506 | char **domains = NULL((void *)0); | |||
1507 | char *val, *domain; | |||
1508 | unsigned char *buf = NULL((void *)0); | |||
1509 | unsigned char **bufptrs = NULL((void *)0); | |||
1510 | size_t bufsiz = 0, bufn = 0, count = 0, i; | |||
1511 | int token = ';'; | |||
1512 | ||||
1513 | do { | |||
1514 | if (token == ',') | |||
1515 | token = next_token(&val, cfile); | |||
1516 | ||||
1517 | token = next_token(&val, cfile); | |||
1518 | if (token != TOK_STRING262) { | |||
1519 | parse_warn("string expected"); | |||
1520 | goto error; | |||
1521 | } | |||
1522 | domain = strdup(val); | |||
1523 | if (domain == NULL((void *)0)) | |||
1524 | fatalx("Can't allocate domain to compress"); | |||
1525 | push_domain_list(&domains, &count, domain); | |||
1526 | ||||
1527 | /* | |||
1528 | * openbsd.org normally compresses to [7]openbsd[3]org[0]. | |||
1529 | * +2 to string length provides space for leading and | |||
1530 | * trailing (root) prefix lengths not already accounted for | |||
1531 | * by dots, and also provides sufficient space for pointer | |||
1532 | * compression. | |||
1533 | */ | |||
1534 | bufsiz = bufsiz + 2 + strlen(domain); | |||
1535 | token = peek_token(NULL((void *)0), cfile); | |||
1536 | } while (token == ','); | |||
1537 | ||||
1538 | buf = malloc(bufsiz); | |||
1539 | if (!buf) | |||
1540 | fatalx("Can't allocate compressed domain buffer"); | |||
1541 | bufptrs = calloc(count + 1, sizeof *bufptrs); | |||
1542 | if (!bufptrs) | |||
1543 | fatalx("Can't allocate compressed pointer list"); | |||
1544 | bufptrs[0] = buf; | |||
1545 | ||||
1546 | /* dn_comp takes an int for the output buffer size */ | |||
1547 | if (!(bufsiz <= INT_MAX0x7fffffff)) | |||
1548 | fatalx("Size of compressed domain buffer too large"); | |||
1549 | for (i = 0; i < count; i++) { | |||
1550 | int n; | |||
1551 | ||||
1552 | /* see bufsiz <= INT_MAX assertion, above */ | |||
1553 | n = dn_comp__dn_comp(domains[i], &buf[bufn], bufsiz - bufn, bufptrs, | |||
1554 | &bufptrs[count + 1]); | |||
1555 | if (n == -1) | |||
1556 | fatalx("Can't compress domain"); | |||
1557 | bufn += (size_t)n; | |||
1558 | } | |||
1559 | ||||
1560 | rv = tree_const(buf, bufn); | |||
1561 | error: | |||
1562 | free_domain_list(domains, count); | |||
1563 | free(buf); | |||
1564 | free(bufptrs); | |||
1565 | return rv; | |||
1566 | } |