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6d103865 | 1 | /* |
d289ee68 | 2 | * Copyright (C) 2011-2012 by Internet Systems Consortium, Inc. ("ISC") |
a47d6336 | 3 | * Copyright (C) 2006-2007,2009 by Internet Systems Consortium, Inc. ("ISC") |
6d103865 SK |
4 | * |
5 | * Permission to use, copy, modify, and distribute this software for any | |
6 | * purpose with or without fee is hereby granted, provided that the above | |
7 | * copyright notice and this permission notice appear in all copies. | |
8 | * | |
9 | * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH | |
10 | * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY | |
11 | * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, | |
12 | * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM | |
13 | * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE | |
14 | * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR | |
15 | * PERFORMANCE OF THIS SOFTWARE. | |
16 | */ | |
17 | ||
18 | #include "dhcpd.h" | |
19 | ||
20 | /* | |
6d103865 SK |
21 | * TODO: RFC4388 specifies that the server SHOULD return the same |
22 | * options it would for a DHCREQUEST message, if no Parameter | |
23 | * Request List option (option 55) is passed. We do not do that. | |
24 | * | |
25 | * TODO: RFC4388 specifies the creation of a "non-sensitive options" | |
26 | * configuration list, and that these SHOULD be returned. We | |
27 | * have no such list. | |
28 | * | |
29 | * TODO: RFC4388 says the server SHOULD use RFC3118, "Authentication | |
30 | * for DHCP Messages". | |
31 | * | |
32 | * TODO: RFC4388 specifies that you SHOULD insure that you cannot be | |
33 | * DoS'ed by DHCPLEASEQUERY message. | |
34 | */ | |
35 | ||
36 | /* | |
37 | * If you query by hardware address or by client ID, then you may have | |
38 | * more than one IP address for your query argument. We need to do two | |
39 | * things: | |
40 | * | |
41 | * 1. Find the most recent lease. | |
42 | * 2. Find all additional IP addresses for the query argument. | |
43 | * | |
44 | * We do this by looking through all of the leases associated with a | |
45 | * given hardware address or client ID. We use the cltt (client last | |
46 | * transaction time) of the lease, which only has a resolution of one | |
47 | * second, so we might not actually give the very latest IP. | |
48 | */ | |
49 | ||
50 | static struct lease* | |
51 | next_hw(const struct lease *lease) { | |
52 | /* INSIST(lease != NULL); */ | |
53 | return lease->n_hw; | |
54 | } | |
55 | ||
56 | static struct lease* | |
57 | next_uid(const struct lease *lease) { | |
58 | /* INSIST(lease != NULL); */ | |
59 | return lease->n_uid; | |
60 | } | |
61 | ||
62 | void | |
63 | get_newest_lease(struct lease **retval, | |
64 | struct lease *lease, | |
65 | struct lease *(*next)(const struct lease *)) { | |
66 | ||
67 | struct lease *p; | |
68 | struct lease *newest; | |
69 | ||
70 | /* INSIST(newest != NULL); */ | |
71 | /* INSIST(next != NULL); */ | |
72 | ||
73 | *retval = NULL; | |
74 | ||
75 | if (lease == NULL) { | |
76 | return; | |
77 | } | |
78 | ||
79 | newest = lease; | |
80 | for (p=next(lease); p != NULL; p=next(p)) { | |
81 | if (newest->binding_state == FTS_ACTIVE) { | |
82 | if ((p->binding_state == FTS_ACTIVE) && | |
83 | (p->cltt > newest->cltt)) { | |
84 | newest = p; | |
85 | } | |
86 | } else { | |
87 | if (p->ends > newest->ends) { | |
88 | newest = p; | |
89 | } | |
90 | } | |
91 | } | |
92 | ||
93 | lease_reference(retval, newest, MDL); | |
94 | } | |
95 | ||
96 | static int | |
97 | get_associated_ips(const struct lease *lease, | |
98 | struct lease *(*next)(const struct lease *), | |
99 | const struct lease *newest, | |
100 | u_int32_t *associated_ips, | |
101 | unsigned int associated_ips_size) { | |
102 | ||
103 | const struct lease *p; | |
104 | int cnt; | |
105 | ||
106 | /* INSIST(next != NULL); */ | |
107 | /* INSIST(associated_ips != NULL); */ | |
108 | ||
109 | if (lease == NULL) { | |
110 | return 0; | |
111 | } | |
112 | ||
113 | cnt = 0; | |
114 | for (p=lease; p != NULL; p=next(p)) { | |
115 | if ((p->binding_state == FTS_ACTIVE) && (p != newest)) { | |
116 | if (cnt < associated_ips_size) { | |
117 | memcpy(&associated_ips[cnt], | |
118 | p->ip_addr.iabuf, | |
119 | sizeof(associated_ips[cnt])); | |
120 | } | |
121 | cnt++; | |
122 | } | |
123 | } | |
124 | return cnt; | |
125 | } | |
126 | ||
127 | ||
128 | void | |
129 | dhcpleasequery(struct packet *packet, int ms_nulltp) { | |
130 | char msgbuf[256]; | |
131 | char dbg_info[128]; | |
132 | struct iaddr cip; | |
133 | struct iaddr gip; | |
134 | struct data_string uid; | |
135 | struct hardware h; | |
136 | struct lease *tmp_lease; | |
137 | struct lease *lease; | |
138 | int want_associated_ip; | |
139 | int assoc_ip_cnt; | |
20ae1aff | 140 | u_int32_t assoc_ips[40]; /* XXXSK: arbitrary maximum number of IPs */ |
6d103865 SK |
141 | const int nassoc_ips = sizeof(assoc_ips) / sizeof(assoc_ips[0]); |
142 | ||
143 | unsigned char dhcpMsgType; | |
144 | const char *dhcp_msg_type_name; | |
145 | struct subnet *subnet; | |
656b1ece | 146 | struct group *relay_group; |
6d103865 SK |
147 | struct option_state *options; |
148 | struct option_cache *oc; | |
149 | int allow_leasequery; | |
150 | int ignorep; | |
151 | u_int32_t lease_duration; | |
152 | u_int32_t time_renewal; | |
153 | u_int32_t time_rebinding; | |
154 | u_int32_t time_expiry; | |
155 | u_int32_t client_last_transaction_time; | |
156 | struct sockaddr_in to; | |
157 | struct in_addr siaddr; | |
158 | struct data_string prl; | |
159 | struct data_string *prl_ptr; | |
160 | ||
161 | int i; | |
162 | struct interface_info *interface; | |
163 | ||
164 | /* INSIST(packet != NULL); */ | |
165 | ||
166 | /* | |
167 | * Prepare log information. | |
168 | */ | |
169 | snprintf(msgbuf, sizeof(msgbuf), | |
170 | "DHCPLEASEQUERY from %s", inet_ntoa(packet->raw->giaddr)); | |
171 | ||
172 | /* | |
173 | * We can't reply if there is no giaddr field. | |
174 | */ | |
175 | if (!packet->raw->giaddr.s_addr) { | |
176 | log_info("%s: missing giaddr, ciaddr is %s, no reply sent", | |
177 | msgbuf, inet_ntoa(packet->raw->ciaddr)); | |
178 | return; | |
179 | } | |
180 | ||
181 | /* | |
656b1ece TM |
182 | * Initially we use the 'giaddr' subnet options scope to determine if |
183 | * the giaddr-identified relay agent is permitted to perform a | |
184 | * leasequery. The subnet is not required, and may be omitted, in | |
185 | * which case we are essentially interrogating the root options class | |
186 | * to find a globally permit. | |
6d103865 SK |
187 | */ |
188 | gip.len = sizeof(packet->raw->giaddr); | |
189 | memcpy(gip.iabuf, &packet->raw->giaddr, sizeof(packet->raw->giaddr)); | |
190 | ||
191 | subnet = NULL; | |
192 | find_subnet(&subnet, gip, MDL); | |
656b1ece TM |
193 | if (subnet != NULL) |
194 | relay_group = subnet->group; | |
195 | else | |
196 | relay_group = root_group; | |
197 | ||
198 | subnet_dereference(&subnet, MDL); | |
6d103865 SK |
199 | |
200 | options = NULL; | |
201 | if (!option_state_allocate(&options, MDL)) { | |
6d103865 SK |
202 | log_error("No memory for option state."); |
203 | log_info("%s: out of memory, no reply sent", msgbuf); | |
204 | return; | |
205 | } | |
206 | ||
207 | execute_statements_in_scope(NULL, | |
208 | packet, | |
209 | NULL, | |
210 | NULL, | |
211 | packet->options, | |
212 | options, | |
213 | &global_scope, | |
656b1ece | 214 | relay_group, |
6d103865 | 215 | NULL); |
656b1ece | 216 | |
6d103865 SK |
217 | for (i=packet->class_count-1; i>=0; i--) { |
218 | execute_statements_in_scope(NULL, | |
219 | packet, | |
220 | NULL, | |
221 | NULL, | |
222 | packet->options, | |
223 | options, | |
224 | &global_scope, | |
225 | packet->classes[i]->group, | |
656b1ece | 226 | relay_group); |
6d103865 SK |
227 | } |
228 | ||
6d103865 SK |
229 | /* |
230 | * Because LEASEQUERY has some privacy concerns, default to deny. | |
231 | */ | |
232 | allow_leasequery = 0; | |
233 | ||
234 | /* | |
20ae1aff | 235 | * See if we are authorized to do LEASEQUERY. |
6d103865 SK |
236 | */ |
237 | oc = lookup_option(&server_universe, options, SV_LEASEQUERY); | |
238 | if (oc != NULL) { | |
239 | allow_leasequery = evaluate_boolean_option_cache(&ignorep, | |
240 | packet, NULL, NULL, packet->options, | |
241 | options, &global_scope, oc, MDL); | |
242 | } | |
243 | ||
244 | if (!allow_leasequery) { | |
245 | log_info("%s: LEASEQUERY not allowed, query ignored", msgbuf); | |
246 | option_state_dereference(&options, MDL); | |
247 | return; | |
248 | } | |
656b1ece | 249 | |
6d103865 SK |
250 | |
251 | /* | |
252 | * Copy out the client IP address. | |
253 | */ | |
254 | cip.len = sizeof(packet->raw->ciaddr); | |
255 | memcpy(cip.iabuf, &packet->raw->ciaddr, sizeof(packet->raw->ciaddr)); | |
256 | ||
257 | /* | |
258 | * If the client IP address is valid (not all zero), then we | |
259 | * are looking for information about that IP address. | |
260 | */ | |
261 | assoc_ip_cnt = 0; | |
27837f95 | 262 | lease = tmp_lease = NULL; |
6d103865 SK |
263 | if (memcmp(cip.iabuf, "\0\0\0", 4)) { |
264 | ||
265 | want_associated_ip = 0; | |
266 | ||
267 | snprintf(dbg_info, sizeof(dbg_info), "IP %s", piaddr(cip)); | |
268 | find_lease_by_ip_addr(&lease, cip, MDL); | |
269 | ||
270 | ||
271 | } else { | |
272 | ||
273 | want_associated_ip = 1; | |
274 | ||
275 | /* | |
276 | * If the client IP address is all zero, then we will | |
277 | * either look up by the client identifier (if we have | |
278 | * one), or by the MAC address. | |
279 | */ | |
280 | ||
281 | memset(&uid, 0, sizeof(uid)); | |
282 | if (get_option(&uid, | |
283 | &dhcp_universe, | |
284 | packet, | |
285 | NULL, | |
286 | NULL, | |
287 | packet->options, | |
288 | NULL, | |
289 | packet->options, | |
290 | &global_scope, | |
291 | DHO_DHCP_CLIENT_IDENTIFIER, | |
292 | MDL)) { | |
293 | ||
294 | snprintf(dbg_info, | |
295 | sizeof(dbg_info), | |
296 | "client-id %s", | |
297 | print_hex_1(uid.len, uid.data, 60)); | |
298 | ||
299 | find_lease_by_uid(&tmp_lease, uid.data, uid.len, MDL); | |
300 | data_string_forget(&uid, MDL); | |
301 | get_newest_lease(&lease, tmp_lease, next_uid); | |
302 | assoc_ip_cnt = get_associated_ips(tmp_lease, | |
303 | next_uid, | |
304 | lease, | |
305 | assoc_ips, | |
306 | nassoc_ips); | |
307 | ||
308 | } else { | |
309 | ||
310 | if (packet->raw->hlen+1 > sizeof(h.hbuf)) { | |
311 | log_info("%s: hardware length too long, " | |
312 | "no reply sent", msgbuf); | |
313 | option_state_dereference(&options, MDL); | |
314 | return; | |
315 | } | |
316 | ||
317 | h.hlen = packet->raw->hlen + 1; | |
318 | h.hbuf[0] = packet->raw->htype; | |
319 | memcpy(&h.hbuf[1], | |
320 | packet->raw->chaddr, | |
321 | packet->raw->hlen); | |
322 | ||
323 | snprintf(dbg_info, | |
324 | sizeof(dbg_info), | |
325 | "MAC address %s", | |
326 | print_hw_addr(h.hbuf[0], | |
327 | h.hlen - 1, | |
328 | &h.hbuf[1])); | |
329 | ||
330 | find_lease_by_hw_addr(&tmp_lease, h.hbuf, h.hlen, MDL); | |
331 | get_newest_lease(&lease, tmp_lease, next_hw); | |
332 | assoc_ip_cnt = get_associated_ips(tmp_lease, | |
333 | next_hw, | |
334 | lease, | |
335 | assoc_ips, | |
336 | nassoc_ips); | |
337 | ||
338 | } | |
339 | ||
340 | lease_dereference(&tmp_lease, MDL); | |
341 | ||
342 | if (lease != NULL) { | |
343 | memcpy(&packet->raw->ciaddr, | |
344 | lease->ip_addr.iabuf, | |
345 | sizeof(packet->raw->ciaddr)); | |
346 | } | |
347 | ||
348 | /* | |
349 | * Log if we have too many IP addresses associated | |
350 | * with this client. | |
351 | */ | |
352 | if (want_associated_ip && (assoc_ip_cnt > nassoc_ips)) { | |
353 | log_info("%d IP addresses associated with %s, " | |
354 | "only %d sent in reply.", | |
355 | assoc_ip_cnt, dbg_info, nassoc_ips); | |
356 | } | |
357 | } | |
358 | ||
359 | /* | |
360 | * We now know the query target too, so can report this in | |
361 | * our log message. | |
362 | */ | |
363 | snprintf(msgbuf, sizeof(msgbuf), | |
364 | "DHCPLEASEQUERY from %s for %s", | |
365 | inet_ntoa(packet->raw->giaddr), dbg_info); | |
366 | ||
367 | /* | |
368 | * Figure our our return type. | |
369 | */ | |
370 | if (lease == NULL) { | |
371 | dhcpMsgType = DHCPLEASEUNKNOWN; | |
372 | dhcp_msg_type_name = "DHCPLEASEUNKNOWN"; | |
373 | } else { | |
374 | if (lease->binding_state == FTS_ACTIVE) { | |
375 | dhcpMsgType = DHCPLEASEACTIVE; | |
376 | dhcp_msg_type_name = "DHCPLEASEACTIVE"; | |
377 | } else { | |
378 | dhcpMsgType = DHCPLEASEUNASSIGNED; | |
379 | dhcp_msg_type_name = "DHCPLEASEUNASSIGNED"; | |
380 | } | |
381 | } | |
382 | ||
383 | /* | |
384 | * Set options that only make sense if we have an active lease. | |
385 | */ | |
386 | ||
387 | if (dhcpMsgType == DHCPLEASEACTIVE) | |
388 | { | |
656b1ece TM |
389 | /* |
390 | * RFC 4388 uses the PRL to request options for the agent to | |
391 | * receive that are "about" the client. It is confusing | |
392 | * because in some cases it wants to know what was sent to | |
393 | * the client (lease times, adjusted), and in others it wants | |
394 | * to know information the client sent. You're supposed to | |
395 | * know this on a case-by-case basis. | |
396 | * | |
397 | * "Name servers", "domain name", and the like from the relay | |
398 | * agent's scope seems less than useful. Our options are to | |
399 | * restart the option cache from the lease's best point of view | |
400 | * (execute statements from the lease pool's group), or to | |
401 | * simply restart the option cache from empty. | |
402 | * | |
403 | * I think restarting the option cache from empty best | |
404 | * approaches RFC 4388's intent; specific options are included. | |
405 | */ | |
406 | option_state_dereference(&options, MDL); | |
407 | ||
408 | if (!option_state_allocate(&options, MDL)) { | |
409 | log_error("%s: out of memory, no reply sent", msgbuf); | |
410 | lease_dereference(&lease, MDL); | |
411 | return; | |
412 | } | |
6d103865 SK |
413 | |
414 | /* | |
415 | * Set the hardware address fields. | |
416 | */ | |
417 | ||
418 | packet->raw->hlen = lease->hardware_addr.hlen - 1; | |
419 | packet->raw->htype = lease->hardware_addr.hbuf[0]; | |
420 | memcpy(packet->raw->chaddr, | |
421 | &lease->hardware_addr.hbuf[1], | |
422 | sizeof(packet->raw->chaddr)); | |
423 | ||
424 | /* | |
425 | * Set client identifier option. | |
426 | */ | |
427 | if (lease->uid_len > 0) { | |
428 | if (!add_option(options, | |
429 | DHO_DHCP_CLIENT_IDENTIFIER, | |
430 | lease->uid, | |
431 | lease->uid_len)) { | |
432 | option_state_dereference(&options, MDL); | |
433 | lease_dereference(&lease, MDL); | |
434 | log_info("%s: out of memory, no reply sent", | |
435 | msgbuf); | |
436 | return; | |
437 | } | |
438 | } | |
439 | ||
440 | ||
441 | /* | |
442 | * Calculate T1 and T2, the times when the client | |
443 | * tries to extend its lease on its networking | |
444 | * address. | |
445 | * These seem to be hard-coded in ISC DHCP, to 0.5 and | |
446 | * 0.875 of the lease time. | |
447 | */ | |
448 | ||
449 | lease_duration = lease->ends - lease->starts; | |
450 | time_renewal = lease->starts + | |
451 | (lease_duration / 2); | |
452 | time_rebinding = lease->starts + | |
453 | (lease_duration / 2) + | |
454 | (lease_duration / 4) + | |
455 | (lease_duration / 8); | |
456 | ||
457 | if (time_renewal > cur_time) { | |
d289ee68 | 458 | time_renewal = htonl(time_renewal - cur_time); |
656b1ece | 459 | |
6d103865 SK |
460 | if (!add_option(options, |
461 | DHO_DHCP_RENEWAL_TIME, | |
462 | &time_renewal, | |
463 | sizeof(time_renewal))) { | |
464 | option_state_dereference(&options, MDL); | |
465 | lease_dereference(&lease, MDL); | |
466 | log_info("%s: out of memory, no reply sent", | |
467 | msgbuf); | |
468 | return; | |
469 | } | |
470 | } | |
471 | ||
472 | if (time_rebinding > cur_time) { | |
473 | time_rebinding = htonl(time_rebinding - cur_time); | |
656b1ece | 474 | |
6d103865 SK |
475 | if (!add_option(options, |
476 | DHO_DHCP_REBINDING_TIME, | |
477 | &time_rebinding, | |
478 | sizeof(time_rebinding))) { | |
479 | option_state_dereference(&options, MDL); | |
480 | lease_dereference(&lease, MDL); | |
481 | log_info("%s: out of memory, no reply sent", | |
482 | msgbuf); | |
483 | return; | |
484 | } | |
485 | } | |
486 | ||
487 | if (lease->ends > cur_time) { | |
488 | time_expiry = htonl(lease->ends - cur_time); | |
d289ee68 | 489 | |
6d103865 SK |
490 | if (!add_option(options, |
491 | DHO_DHCP_LEASE_TIME, | |
492 | &time_expiry, | |
493 | sizeof(time_expiry))) { | |
494 | option_state_dereference(&options, MDL); | |
495 | lease_dereference(&lease, MDL); | |
496 | log_info("%s: out of memory, no reply sent", | |
497 | msgbuf); | |
498 | return; | |
499 | } | |
500 | } | |
501 | ||
656b1ece TM |
502 | /* Supply the Vendor-Class-Identifier. */ |
503 | if (lease->scope != NULL) { | |
504 | struct data_string vendor_class; | |
505 | ||
506 | memset(&vendor_class, 0, sizeof(vendor_class)); | |
507 | ||
508 | if (find_bound_string(&vendor_class, lease->scope, | |
509 | "vendor-class-identifier")) { | |
510 | if (!add_option(options, | |
511 | DHO_VENDOR_CLASS_IDENTIFIER, | |
512 | (void *)vendor_class.data, | |
513 | vendor_class.len)) { | |
514 | option_state_dereference(&options, | |
515 | MDL); | |
516 | lease_dereference(&lease, MDL); | |
517 | log_error("%s: error adding vendor " | |
518 | "class identifier, no reply " | |
519 | "sent", msgbuf); | |
520 | data_string_forget(&vendor_class, MDL); | |
521 | return; | |
522 | } | |
523 | data_string_forget(&vendor_class, MDL); | |
524 | } | |
525 | } | |
6d103865 SK |
526 | |
527 | /* | |
528 | * Set the relay agent info. | |
656b1ece TM |
529 | * |
530 | * Note that because agent info is appended without regard | |
531 | * to the PRL in cons_options(), this will be sent as the | |
532 | * last option in the packet whether it is listed on PRL or | |
533 | * not. | |
6d103865 SK |
534 | */ |
535 | ||
536 | if (lease->agent_options != NULL) { | |
537 | int idx = agent_universe.index; | |
538 | struct option_chain_head **tmp1 = | |
539 | (struct option_chain_head **) | |
540 | &(options->universes[idx]); | |
541 | struct option_chain_head *tmp2 = | |
542 | (struct option_chain_head *) | |
543 | lease->agent_options; | |
544 | ||
545 | option_chain_head_reference(tmp1, tmp2, MDL); | |
546 | } | |
547 | ||
548 | /* | |
549 | * Set the client last transaction time. | |
550 | * We check to make sure we have a timestamp. For | |
551 | * lease files that were saved before running a | |
552 | * timestamp-aware version of the server, this may | |
553 | * not be set. | |
554 | */ | |
555 | ||
556 | if (lease->cltt != MIN_TIME) { | |
557 | if (cur_time > lease->cltt) { | |
558 | client_last_transaction_time = | |
559 | htonl(cur_time - lease->cltt); | |
560 | } else { | |
561 | client_last_transaction_time = htonl(0); | |
562 | } | |
563 | if (!add_option(options, | |
564 | DHO_CLIENT_LAST_TRANSACTION_TIME, | |
565 | &client_last_transaction_time, | |
566 | sizeof(client_last_transaction_time))) { | |
567 | option_state_dereference(&options, MDL); | |
568 | lease_dereference(&lease, MDL); | |
569 | log_info("%s: out of memory, no reply sent", | |
570 | msgbuf); | |
571 | return; | |
572 | } | |
573 | } | |
574 | ||
575 | /* | |
576 | * Set associated IPs, if requested and there are some. | |
577 | */ | |
578 | if (want_associated_ip && (assoc_ip_cnt > 0)) { | |
579 | if (!add_option(options, | |
580 | DHO_ASSOCIATED_IP, | |
581 | assoc_ips, | |
582 | assoc_ip_cnt * sizeof(assoc_ips[0]))) { | |
583 | option_state_dereference(&options, MDL); | |
584 | lease_dereference(&lease, MDL); | |
585 | log_info("%s: out of memory, no reply sent", | |
586 | msgbuf); | |
587 | return; | |
588 | } | |
589 | } | |
590 | } | |
591 | ||
592 | /* | |
593 | * Set the message type. | |
594 | */ | |
595 | ||
596 | packet->raw->op = BOOTREPLY; | |
597 | ||
598 | /* | |
599 | * Set DHCP message type. | |
600 | */ | |
601 | if (!add_option(options, | |
602 | DHO_DHCP_MESSAGE_TYPE, | |
603 | &dhcpMsgType, | |
604 | sizeof(dhcpMsgType))) { | |
605 | option_state_dereference(&options, MDL); | |
606 | lease_dereference(&lease, MDL); | |
607 | log_info("%s: error adding option, no reply sent", msgbuf); | |
608 | return; | |
609 | } | |
610 | ||
611 | /* | |
612 | * Log the message we've received. | |
613 | */ | |
614 | log_info("%s", msgbuf); | |
615 | ||
616 | /* | |
617 | * Figure out which address to use to send from. | |
618 | */ | |
619 | get_server_source_address(&siaddr, options, packet); | |
620 | ||
621 | /* | |
622 | * Set up the option buffer. | |
623 | */ | |
624 | ||
625 | memset(&prl, 0, sizeof(prl)); | |
626 | oc = lookup_option(&dhcp_universe, options, | |
627 | DHO_DHCP_PARAMETER_REQUEST_LIST); | |
628 | if (oc != NULL) { | |
629 | evaluate_option_cache(&prl, | |
630 | packet, | |
631 | NULL, | |
632 | NULL, | |
633 | packet->options, | |
634 | options, | |
635 | &global_scope, | |
636 | oc, | |
637 | MDL); | |
638 | } | |
639 | if (prl.len > 0) { | |
640 | prl_ptr = &prl; | |
641 | } else { | |
642 | prl_ptr = NULL; | |
643 | } | |
644 | ||
645 | packet->packet_length = cons_options(packet, | |
646 | packet->raw, | |
647 | lease, | |
648 | NULL, | |
649 | 0, | |
650 | packet->options, | |
651 | options, | |
652 | &global_scope, | |
653 | 0, | |
654 | 0, | |
655 | 0, | |
656 | prl_ptr, | |
657 | NULL); | |
658 | ||
659 | data_string_forget(&prl, MDL); /* SK: safe, even if empty */ | |
660 | option_state_dereference(&options, MDL); | |
661 | lease_dereference(&lease, MDL); | |
662 | ||
663 | to.sin_family = AF_INET; | |
664 | #ifdef HAVE_SA_LEN | |
665 | to.sin_len = sizeof(to); | |
666 | #endif | |
667 | memset(to.sin_zero, 0, sizeof(to.sin_zero)); | |
668 | ||
669 | /* | |
670 | * Leasequery packets are be sent to the gateway address. | |
671 | */ | |
672 | to.sin_addr = packet->raw->giaddr; | |
673 | if (packet->raw->giaddr.s_addr != htonl(INADDR_LOOPBACK)) { | |
674 | to.sin_port = local_port; | |
675 | } else { | |
676 | to.sin_port = remote_port; /* XXXSK: For debugging. */ | |
677 | } | |
678 | ||
679 | /* | |
680 | * The fallback_interface lets us send with a real IP | |
681 | * address. The packet interface sends from all-zeros. | |
682 | */ | |
683 | if (fallback_interface != NULL) { | |
684 | interface = fallback_interface; | |
685 | } else { | |
686 | interface = packet->interface; | |
687 | } | |
688 | ||
689 | /* | |
690 | * Report what we're sending. | |
691 | */ | |
692 | log_info("%s to %s for %s (%d associated IPs)", | |
693 | dhcp_msg_type_name, | |
694 | inet_ntoa(to.sin_addr), dbg_info, assoc_ip_cnt); | |
695 | ||
696 | send_packet(interface, | |
697 | NULL, | |
698 | packet->raw, | |
699 | packet->packet_length, | |
700 | siaddr, | |
701 | &to, | |
702 | NULL); | |
703 | } | |
704 | ||
37ec5845 FD |
705 | #ifdef DHCPv6 |
706 | ||
707 | /* | |
708 | * TODO: RFC5007 query-by-clientid. | |
709 | * | |
710 | * TODO: RFC5007 look at the pools according to the link-address. | |
711 | * | |
712 | * TODO: get fixed leases too. | |
713 | * | |
714 | * TODO: RFC5007 ORO in query-options. | |
715 | * | |
37ec5845 FD |
716 | * TODO: RFC5007 lq-relay-data. |
717 | * | |
718 | * TODO: RFC5007 lq-client-link. | |
719 | * | |
720 | * Note: the code is still nearly compliant and usable for the target | |
721 | * case with these missing features! | |
722 | */ | |
723 | ||
724 | /* | |
725 | * The structure to handle a leasequery. | |
726 | */ | |
727 | struct lq6_state { | |
728 | struct packet *packet; | |
729 | struct data_string client_id; | |
730 | struct data_string server_id; | |
731 | struct data_string lq_query; | |
732 | uint8_t query_type; | |
733 | struct in6_addr link_addr; | |
734 | struct option_state *query_opts; | |
735 | ||
736 | struct option_state *reply_opts; | |
737 | unsigned cursor; | |
738 | union reply_buffer { | |
739 | unsigned char data[65536]; | |
740 | struct dhcpv6_packet reply; | |
741 | } buf; | |
742 | }; | |
743 | ||
744 | /* | |
745 | * Options that we want to send. | |
746 | */ | |
747 | static const int required_opts_lq[] = { | |
748 | D6O_CLIENTID, | |
749 | D6O_SERVERID, | |
750 | D6O_STATUS_CODE, | |
751 | D6O_CLIENT_DATA, | |
752 | D6O_LQ_RELAY_DATA, | |
753 | D6O_LQ_CLIENT_LINK, | |
754 | 0 | |
755 | }; | |
756 | static const int required_opt_CLIENT_DATA[] = { | |
757 | D6O_CLIENTID, | |
758 | D6O_IAADDR, | |
759 | D6O_IAPREFIX, | |
760 | D6O_CLT_TIME, | |
761 | 0 | |
762 | }; | |
763 | ||
764 | /* | |
765 | * Get the lq-query option from the packet. | |
766 | */ | |
767 | static isc_result_t | |
768 | get_lq_query(struct lq6_state *lq) | |
769 | { | |
770 | struct data_string *lq_query = &lq->lq_query; | |
771 | struct packet *packet = lq->packet; | |
772 | struct option_cache *oc; | |
773 | ||
774 | /* | |
775 | * Verify our lq_query structure is empty. | |
776 | */ | |
777 | if ((lq_query->data != NULL) || (lq_query->len != 0)) { | |
98bf1607 | 778 | return DHCP_R_INVALIDARG; |
37ec5845 FD |
779 | } |
780 | ||
781 | oc = lookup_option(&dhcpv6_universe, packet->options, D6O_LQ_QUERY); | |
782 | if (oc == NULL) { | |
783 | return ISC_R_NOTFOUND; | |
784 | } | |
785 | ||
786 | if (!evaluate_option_cache(lq_query, packet, NULL, NULL, | |
787 | packet->options, NULL, | |
788 | &global_scope, oc, MDL)) { | |
789 | return ISC_R_FAILURE; | |
790 | } | |
791 | ||
792 | return ISC_R_SUCCESS; | |
793 | } | |
794 | ||
795 | /* | |
796 | * Message validation, RFC 5007 section 4.2.1: | |
797 | * dhcpv6.c:valid_client_msg() - unicast + lq-query option. | |
798 | */ | |
799 | static int | |
800 | valid_query_msg(struct lq6_state *lq) { | |
801 | struct packet *packet = lq->packet; | |
802 | int ret_val = 0; | |
803 | struct option_cache *oc; | |
804 | ||
805 | /* INSIST((lq != NULL) || (packet != NULL)); */ | |
806 | ||
807 | switch (get_client_id(packet, &lq->client_id)) { | |
808 | case ISC_R_SUCCESS: | |
809 | break; | |
810 | case ISC_R_NOTFOUND: | |
811 | log_debug("Discarding %s from %s; " | |
812 | "client identifier missing", | |
813 | dhcpv6_type_names[packet->dhcpv6_msg_type], | |
814 | piaddr(packet->client_addr)); | |
815 | goto exit; | |
816 | default: | |
817 | log_error("Error processing %s from %s; " | |
818 | "unable to evaluate Client Identifier", | |
819 | dhcpv6_type_names[packet->dhcpv6_msg_type], | |
820 | piaddr(packet->client_addr)); | |
821 | goto exit; | |
822 | } | |
823 | ||
824 | oc = lookup_option(&dhcpv6_universe, packet->options, D6O_SERVERID); | |
825 | if (oc != NULL) { | |
826 | if (evaluate_option_cache(&lq->server_id, packet, NULL, NULL, | |
827 | packet->options, NULL, | |
828 | &global_scope, oc, MDL)) { | |
829 | log_debug("Discarding %s from %s; " | |
830 | "server identifier found " | |
831 | "(CLIENTID %s, SERVERID %s)", | |
832 | dhcpv6_type_names[packet->dhcpv6_msg_type], | |
833 | piaddr(packet->client_addr), | |
834 | print_hex_1(lq->client_id.len, | |
835 | lq->client_id.data, 60), | |
836 | print_hex_2(lq->server_id.len, | |
837 | lq->server_id.data, 60)); | |
838 | } else { | |
839 | log_debug("Discarding %s from %s; " | |
840 | "server identifier found " | |
841 | "(CLIENTID %s)", | |
842 | dhcpv6_type_names[packet->dhcpv6_msg_type], | |
843 | print_hex_1(lq->client_id.len, | |
844 | lq->client_id.data, 60), | |
845 | piaddr(packet->client_addr)); | |
846 | } | |
847 | goto exit; | |
848 | } | |
849 | ||
850 | switch (get_lq_query(lq)) { | |
851 | case ISC_R_SUCCESS: | |
852 | break; | |
853 | case ISC_R_NOTFOUND: | |
854 | log_debug("Discarding %s from %s; lq-query missing", | |
855 | dhcpv6_type_names[packet->dhcpv6_msg_type], | |
856 | piaddr(packet->client_addr)); | |
857 | goto exit; | |
858 | default: | |
859 | log_error("Error processing %s from %s; " | |
860 | "unable to evaluate LQ-Query", | |
861 | dhcpv6_type_names[packet->dhcpv6_msg_type], | |
862 | piaddr(packet->client_addr)); | |
863 | goto exit; | |
864 | } | |
865 | ||
866 | /* looks good */ | |
867 | ret_val = 1; | |
868 | ||
869 | exit: | |
870 | if (!ret_val) { | |
871 | if (lq->client_id.len > 0) { | |
872 | data_string_forget(&lq->client_id, MDL); | |
873 | } | |
874 | if (lq->server_id.len > 0) { | |
875 | data_string_forget(&lq->server_id, MDL); | |
876 | } | |
877 | if (lq->lq_query.len > 0) { | |
878 | data_string_forget(&lq->lq_query, MDL); | |
879 | } | |
880 | } | |
881 | return ret_val; | |
882 | } | |
883 | ||
884 | /* | |
885 | * Set an error in a status-code option (from set_status_code). | |
886 | */ | |
887 | static int | |
888 | set_error(struct lq6_state *lq, u_int16_t code, const char *message) { | |
889 | struct data_string d; | |
890 | int ret_val; | |
891 | ||
892 | memset(&d, 0, sizeof(d)); | |
893 | d.len = sizeof(code) + strlen(message); | |
894 | if (!buffer_allocate(&d.buffer, d.len, MDL)) { | |
895 | log_fatal("set_error: no memory for status code."); | |
896 | } | |
897 | d.data = d.buffer->data; | |
898 | putUShort(d.buffer->data, code); | |
899 | memcpy(d.buffer->data + sizeof(code), message, d.len - sizeof(code)); | |
900 | if (!save_option_buffer(&dhcpv6_universe, lq->reply_opts, | |
901 | d.buffer, (unsigned char *)d.data, d.len, | |
902 | D6O_STATUS_CODE, 0)) { | |
903 | log_error("set_error: error saving status code."); | |
904 | ret_val = 0; | |
905 | } else { | |
906 | ret_val = 1; | |
907 | } | |
908 | data_string_forget(&d, MDL); | |
909 | return ret_val; | |
910 | } | |
911 | ||
912 | /* | |
913 | * Process a by-address lease query. | |
914 | */ | |
915 | static int | |
916 | process_lq_by_address(struct lq6_state *lq) { | |
917 | struct packet *packet = lq->packet; | |
918 | struct option_cache *oc; | |
919 | struct ipv6_pool *pool = NULL; | |
920 | struct data_string data; | |
921 | struct in6_addr addr; | |
1d17db44 | 922 | struct iasubopt *iaaddr = NULL; |
37ec5845 FD |
923 | struct option_state *opt_state = NULL; |
924 | u_int32_t lifetime; | |
925 | unsigned opt_cursor; | |
926 | int ret_val = 0; | |
927 | ||
928 | /* | |
929 | * Get the IAADDR. | |
930 | */ | |
931 | oc = lookup_option(&dhcpv6_universe, lq->query_opts, D6O_IAADDR); | |
932 | if (oc == NULL) { | |
933 | if (!set_error(lq, STATUS_MalformedQuery, | |
934 | "No OPTION_IAADDR.")) { | |
935 | log_error("process_lq_by_address: unable " | |
936 | "to set MalformedQuery status code."); | |
937 | return 0; | |
938 | } | |
939 | return 1; | |
940 | } | |
941 | memset(&data, 0, sizeof(data)); | |
942 | if (!evaluate_option_cache(&data, packet, | |
943 | NULL, NULL, | |
944 | lq->query_opts, NULL, | |
945 | &global_scope, oc, MDL) || | |
946 | (data.len < IAADDR_OFFSET)) { | |
947 | log_error("process_lq_by_address: error evaluating IAADDR."); | |
948 | goto exit; | |
949 | } | |
950 | memcpy(&addr, data.data, sizeof(addr)); | |
951 | data_string_forget(&data, MDL); | |
952 | ||
953 | /* | |
954 | * Find the lease. | |
955 | * Note the RFC 5007 says to use the link-address to find the link | |
956 | * or the ia-aadr when it is :: but in any case the ia-addr has | |
957 | * to be on the link, so we ignore the link-address here. | |
958 | */ | |
6027d38f | 959 | if (find_ipv6_pool(&pool, D6O_IA_NA, &addr) != ISC_R_SUCCESS) { |
37ec5845 FD |
960 | if (!set_error(lq, STATUS_NotConfigured, |
961 | "Address not in a pool.")) { | |
962 | log_error("process_lq_by_address: unable " | |
963 | "to set NotConfigured status code."); | |
964 | goto exit; | |
965 | } | |
966 | ret_val = 1; | |
967 | goto exit; | |
968 | } | |
1d17db44 FD |
969 | if (iasubopt_hash_lookup(&iaaddr, pool->leases, &addr, |
970 | sizeof(addr), MDL) == 0) { | |
37ec5845 FD |
971 | ret_val = 1; |
972 | goto exit; | |
973 | } | |
974 | if ((iaaddr == NULL) || (iaaddr->state != FTS_ACTIVE) || | |
6027d38f | 975 | (iaaddr->ia == NULL) || (iaaddr->ia->iaid_duid.len <= 4)) { |
37ec5845 FD |
976 | ret_val = 1; |
977 | goto exit; | |
978 | } | |
979 | ||
980 | /* | |
981 | * Build the client-data option (with client-id, ia-addr and clt-time). | |
982 | */ | |
983 | if (!option_state_allocate(&opt_state, MDL)) { | |
984 | log_error("process_lq_by_address: " | |
985 | "no memory for option state."); | |
986 | goto exit; | |
987 | } | |
988 | ||
6027d38f | 989 | data_string_copy(&data, &iaaddr->ia->iaid_duid, MDL); |
37ec5845 FD |
990 | data.data += 4; |
991 | data.len -= 4; | |
992 | if (!save_option_buffer(&dhcpv6_universe, opt_state, | |
993 | NULL, (unsigned char *)data.data, data.len, | |
994 | D6O_CLIENTID, 0)) { | |
995 | log_error("process_lq_by_address: error saving client ID."); | |
996 | goto exit; | |
997 | } | |
998 | data_string_forget(&data, MDL); | |
999 | ||
1000 | data.len = IAADDR_OFFSET; | |
1001 | if (!buffer_allocate(&data.buffer, data.len, MDL)) { | |
1002 | log_error("process_lq_by_address: no memory for ia-addr."); | |
1003 | goto exit; | |
1004 | } | |
1005 | data.data = data.buffer->data; | |
1006 | memcpy(data.buffer->data, &iaaddr->addr, 16); | |
1acab09f | 1007 | lifetime = iaaddr->prefer; |
37ec5845 | 1008 | putULong(data.buffer->data + 16, lifetime); |
1acab09f | 1009 | lifetime = iaaddr->valid; |
37ec5845 FD |
1010 | putULong(data.buffer->data + 20, lifetime); |
1011 | if (!save_option_buffer(&dhcpv6_universe, opt_state, | |
1012 | NULL, (unsigned char *)data.data, data.len, | |
1013 | D6O_IAADDR, 0)) { | |
1014 | log_error("process_lq_by_address: error saving ia-addr."); | |
1015 | goto exit; | |
1016 | } | |
1017 | data_string_forget(&data, MDL); | |
1018 | ||
1acab09f | 1019 | lifetime = htonl(iaaddr->ia->cltt); |
37ec5845 FD |
1020 | if (!save_option_buffer(&dhcpv6_universe, opt_state, |
1021 | NULL, (unsigned char *)&lifetime, 4, | |
1022 | D6O_CLT_TIME, 0)) { | |
1023 | log_error("process_lq_by_address: error saving clt time."); | |
1024 | goto exit; | |
1025 | } | |
1026 | ||
1027 | /* | |
1028 | * Store the client-data option. | |
1029 | */ | |
1030 | opt_cursor = lq->cursor; | |
1031 | putUShort(lq->buf.data + lq->cursor, (unsigned)D6O_CLIENT_DATA); | |
1032 | lq->cursor += 2; | |
1033 | /* Skip option length. */ | |
1034 | lq->cursor += 2; | |
1035 | ||
1036 | lq->cursor += store_options6((char *)lq->buf.data + lq->cursor, | |
1037 | sizeof(lq->buf) - lq->cursor, | |
1038 | opt_state, lq->packet, | |
1039 | required_opt_CLIENT_DATA, NULL); | |
1040 | /* Reset the length. */ | |
1041 | putUShort(lq->buf.data + opt_cursor + 2, | |
1042 | lq->cursor - (opt_cursor + 4)); | |
1043 | ||
1044 | /* Done. */ | |
1045 | ret_val = 1; | |
1046 | ||
1047 | exit: | |
1048 | if (data.data != NULL) | |
1049 | data_string_forget(&data, MDL); | |
1050 | if (pool != NULL) | |
1051 | ipv6_pool_dereference(&pool, MDL); | |
1052 | if (iaaddr != NULL) | |
1d17db44 | 1053 | iasubopt_dereference(&iaaddr, MDL); |
37ec5845 FD |
1054 | if (opt_state != NULL) |
1055 | option_state_dereference(&opt_state, MDL); | |
1056 | return ret_val; | |
1057 | } | |
1058 | ||
1059 | ||
1060 | /* | |
1061 | * Process a lease query. | |
1062 | */ | |
1063 | void | |
1064 | dhcpv6_leasequery(struct data_string *reply_ret, struct packet *packet) { | |
1065 | static struct lq6_state lq; | |
37ec5845 FD |
1066 | struct option_cache *oc; |
1067 | int allow_lq; | |
1068 | ||
1069 | /* | |
1070 | * Initialize the lease query state. | |
1071 | */ | |
1072 | lq.packet = NULL; | |
1073 | memset(&lq.client_id, 0, sizeof(lq.client_id)); | |
1074 | memset(&lq.server_id, 0, sizeof(lq.server_id)); | |
1075 | memset(&lq.lq_query, 0, sizeof(lq.lq_query)); | |
1076 | lq.query_opts = NULL; | |
1077 | lq.reply_opts = NULL; | |
1078 | packet_reference(&lq.packet, packet, MDL); | |
1079 | ||
1080 | /* | |
1081 | * Validate our input. | |
1082 | */ | |
1083 | if (!valid_query_msg(&lq)) { | |
1084 | goto exit; | |
1085 | } | |
1086 | ||
1087 | /* | |
1088 | * Prepare our reply. | |
1089 | */ | |
1090 | if (!option_state_allocate(&lq.reply_opts, MDL)) { | |
1091 | log_error("dhcpv6_leasequery: no memory for option state."); | |
1092 | goto exit; | |
1093 | } | |
1094 | execute_statements_in_scope(NULL, lq.packet, NULL, NULL, | |
1095 | lq.packet->options, lq.reply_opts, | |
1096 | &global_scope, root_group, NULL); | |
1097 | ||
1098 | lq.buf.reply.msg_type = DHCPV6_LEASEQUERY_REPLY; | |
1099 | ||
1100 | memcpy(lq.buf.reply.transaction_id, | |
1101 | lq.packet->dhcpv6_transaction_id, | |
1102 | sizeof(lq.buf.reply.transaction_id)); | |
1103 | ||
1104 | /* | |
1105 | * Because LEASEQUERY has some privacy concerns, default to deny. | |
1106 | */ | |
1107 | allow_lq = 0; | |
1108 | ||
1109 | /* | |
1110 | * See if we are authorized to do LEASEQUERY. | |
1111 | */ | |
1112 | oc = lookup_option(&server_universe, lq.reply_opts, SV_LEASEQUERY); | |
1113 | if (oc != NULL) { | |
1114 | allow_lq = evaluate_boolean_option_cache(NULL, | |
1115 | lq.packet, | |
1116 | NULL, NULL, | |
1117 | lq.packet->options, | |
1118 | lq.reply_opts, | |
1119 | &global_scope, | |
1120 | oc, MDL); | |
1121 | } | |
1122 | ||
1123 | if (!allow_lq) { | |
1124 | log_info("dhcpv6_leasequery: not allowed, query ignored."); | |
1125 | goto exit; | |
1126 | } | |
1127 | ||
1128 | /* | |
1129 | * Same than transmission of REPLY message in RFC 3315: | |
1130 | * server-id | |
1131 | * client-id | |
1132 | */ | |
1133 | ||
1134 | oc = lookup_option(&dhcpv6_universe, lq.reply_opts, D6O_SERVERID); | |
1135 | if (oc == NULL) { | |
1136 | /* If not already in options, get from query then global. */ | |
1137 | if (lq.server_id.data == NULL) | |
1138 | copy_server_duid(&lq.server_id, MDL); | |
1139 | if (!save_option_buffer(&dhcpv6_universe, | |
1140 | lq.reply_opts, | |
1141 | NULL, | |
1142 | (unsigned char *)lq.server_id.data, | |
1143 | lq.server_id.len, | |
1144 | D6O_SERVERID, | |
1145 | 0)) { | |
1146 | log_error("dhcpv6_leasequery: " | |
1147 | "error saving server identifier."); | |
1148 | goto exit; | |
1149 | } | |
1150 | } | |
1151 | ||
1152 | if (!save_option_buffer(&dhcpv6_universe, | |
1153 | lq.reply_opts, | |
1154 | lq.client_id.buffer, | |
1155 | (unsigned char *)lq.client_id.data, | |
1156 | lq.client_id.len, | |
1157 | D6O_CLIENTID, | |
1158 | 0)) { | |
1159 | log_error("dhcpv6_leasequery: " | |
1160 | "error saving client identifier."); | |
1161 | goto exit; | |
1162 | } | |
1163 | ||
1164 | lq.cursor = 4; | |
1165 | ||
1166 | /* | |
1167 | * Decode the lq-query option. | |
1168 | */ | |
1169 | ||
1170 | if (lq.lq_query.len <= LQ_QUERY_OFFSET) { | |
1171 | if (!set_error(&lq, STATUS_MalformedQuery, | |
1172 | "OPTION_LQ_QUERY too short.")) { | |
1173 | log_error("dhcpv6_leasequery: unable " | |
1174 | "to set MalformedQuery status code."); | |
1175 | goto exit; | |
1176 | } | |
1177 | goto done; | |
1178 | } | |
1179 | ||
1180 | lq.query_type = lq.lq_query.data [0]; | |
1181 | memcpy(&lq.link_addr, lq.lq_query.data + 1, sizeof(lq.link_addr)); | |
1182 | switch (lq.query_type) { | |
1183 | case LQ6QT_BY_ADDRESS: | |
1184 | break; | |
1185 | case LQ6QT_BY_CLIENTID: | |
1186 | if (!set_error(&lq, STATUS_UnknownQueryType, | |
1187 | "QUERY_BY_CLIENTID not supported.")) { | |
1188 | log_error("dhcpv6_leasequery: unable to " | |
1189 | "set UnknownQueryType status code."); | |
1190 | goto exit; | |
1191 | } | |
1192 | goto done; | |
1193 | default: | |
1194 | if (!set_error(&lq, STATUS_UnknownQueryType, | |
1195 | "Unknown query-type.")) { | |
1196 | log_error("dhcpv6_leasequery: unable to " | |
1197 | "set UnknownQueryType status code."); | |
1198 | goto exit; | |
1199 | } | |
1200 | goto done; | |
1201 | } | |
1202 | ||
1203 | if (!option_state_allocate(&lq.query_opts, MDL)) { | |
1204 | log_error("dhcpv6_leasequery: no memory for option state."); | |
1205 | goto exit; | |
1206 | } | |
1207 | if (!parse_option_buffer(lq.query_opts, | |
1208 | lq.lq_query.data + LQ_QUERY_OFFSET, | |
1209 | lq.lq_query.len - LQ_QUERY_OFFSET, | |
1210 | &dhcpv6_universe)) { | |
1211 | log_error("dhcpv6_leasequery: error parsing query-options."); | |
1212 | if (!set_error(&lq, STATUS_MalformedQuery, | |
1213 | "Bad query-options.")) { | |
1214 | log_error("dhcpv6_leasequery: unable " | |
1215 | "to set MalformedQuery status code."); | |
1216 | goto exit; | |
1217 | } | |
1218 | goto done; | |
1219 | } | |
1220 | ||
1221 | /* Do it. */ | |
1222 | if (!process_lq_by_address(&lq)) | |
1223 | goto exit; | |
1224 | ||
1225 | done: | |
1226 | /* Store the options. */ | |
1227 | lq.cursor += store_options6((char *)lq.buf.data + lq.cursor, | |
1228 | sizeof(lq.buf) - lq.cursor, | |
1229 | lq.reply_opts, | |
1230 | lq.packet, | |
1231 | required_opts_lq, | |
1232 | NULL); | |
1233 | ||
1234 | /* Return our reply to the caller. */ | |
1235 | reply_ret->len = lq.cursor; | |
1236 | reply_ret->buffer = NULL; | |
1237 | if (!buffer_allocate(&reply_ret->buffer, lq.cursor, MDL)) { | |
1238 | log_fatal("dhcpv6_leasequery: no memory to store Reply."); | |
1239 | } | |
1240 | memcpy(reply_ret->buffer->data, lq.buf.data, lq.cursor); | |
1241 | reply_ret->data = reply_ret->buffer->data; | |
1242 | ||
1243 | exit: | |
1244 | /* Cleanup. */ | |
1245 | if (lq.packet != NULL) | |
1246 | packet_dereference(&lq.packet, MDL); | |
1247 | if (lq.client_id.data != NULL) | |
1248 | data_string_forget(&lq.client_id, MDL); | |
1249 | if (lq.server_id.data != NULL) | |
1250 | data_string_forget(&lq.server_id, MDL); | |
1251 | if (lq.lq_query.data != NULL) | |
1252 | data_string_forget(&lq.lq_query, MDL); | |
1253 | if (lq.query_opts != NULL) | |
1254 | option_state_dereference(&lq.query_opts, MDL); | |
1255 | if (lq.reply_opts != NULL) | |
1256 | option_state_dereference(&lq.reply_opts, MDL); | |
1257 | } | |
1258 | ||
1259 | #endif /* DHCPv6 */ |