File: | src/usr.sbin/dhcpd/confpars.c |
Warning: | line 562, column 4 Value stored to 'token' is never read |
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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); |
Value stored to 'token' is never read | |
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_MAX2147483647)) |
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 | } |