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6d103865 | 1 | /* |
7512d88b | 2 | * Copyright (C) 2006-2017 by Internet Systems Consortium, Inc. ("ISC") |
6d103865 | 3 | * |
7512d88b TM |
4 | * This Source Code Form is subject to the terms of the Mozilla Public |
5 | * License, v. 2.0. If a copy of the MPL was not distributed with this | |
6 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. | |
6d103865 SK |
7 | * |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH | |
9 | * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY | |
10 | * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, | |
11 | * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM | |
12 | * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE | |
13 | * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR | |
14 | * PERFORMANCE OF THIS SOFTWARE. | |
15 | */ | |
16 | ||
17 | #include "dhcpd.h" | |
18 | ||
19 | /* | |
6d103865 SK |
20 | * TODO: RFC4388 specifies that the server SHOULD return the same |
21 | * options it would for a DHCREQUEST message, if no Parameter | |
22 | * Request List option (option 55) is passed. We do not do that. | |
23 | * | |
24 | * TODO: RFC4388 specifies the creation of a "non-sensitive options" | |
25 | * configuration list, and that these SHOULD be returned. We | |
26 | * have no such list. | |
27 | * | |
28 | * TODO: RFC4388 says the server SHOULD use RFC3118, "Authentication | |
29 | * for DHCP Messages". | |
30 | * | |
31 | * TODO: RFC4388 specifies that you SHOULD insure that you cannot be | |
32 | * DoS'ed by DHCPLEASEQUERY message. | |
33 | */ | |
34 | ||
35 | /* | |
36 | * If you query by hardware address or by client ID, then you may have | |
37 | * more than one IP address for your query argument. We need to do two | |
38 | * things: | |
39 | * | |
40 | * 1. Find the most recent lease. | |
41 | * 2. Find all additional IP addresses for the query argument. | |
42 | * | |
43 | * We do this by looking through all of the leases associated with a | |
44 | * given hardware address or client ID. We use the cltt (client last | |
45 | * transaction time) of the lease, which only has a resolution of one | |
46 | * second, so we might not actually give the very latest IP. | |
47 | */ | |
48 | ||
49 | static struct lease* | |
50 | next_hw(const struct lease *lease) { | |
51 | /* INSIST(lease != NULL); */ | |
52 | return lease->n_hw; | |
53 | } | |
54 | ||
55 | static struct lease* | |
56 | next_uid(const struct lease *lease) { | |
57 | /* INSIST(lease != NULL); */ | |
58 | return lease->n_uid; | |
59 | } | |
60 | ||
61 | void | |
62 | get_newest_lease(struct lease **retval, | |
63 | struct lease *lease, | |
64 | struct lease *(*next)(const struct lease *)) { | |
65 | ||
66 | struct lease *p; | |
67 | struct lease *newest; | |
68 | ||
69 | /* INSIST(newest != NULL); */ | |
70 | /* INSIST(next != NULL); */ | |
71 | ||
72 | *retval = NULL; | |
73 | ||
74 | if (lease == NULL) { | |
75 | return; | |
76 | } | |
77 | ||
78 | newest = lease; | |
79 | for (p=next(lease); p != NULL; p=next(p)) { | |
80 | if (newest->binding_state == FTS_ACTIVE) { | |
81 | if ((p->binding_state == FTS_ACTIVE) && | |
82 | (p->cltt > newest->cltt)) { | |
83 | newest = p; | |
84 | } | |
85 | } else { | |
86 | if (p->ends > newest->ends) { | |
87 | newest = p; | |
88 | } | |
89 | } | |
90 | } | |
91 | ||
92 | lease_reference(retval, newest, MDL); | |
93 | } | |
94 | ||
95 | static int | |
96 | get_associated_ips(const struct lease *lease, | |
97 | struct lease *(*next)(const struct lease *), | |
98 | const struct lease *newest, | |
99 | u_int32_t *associated_ips, | |
100 | unsigned int associated_ips_size) { | |
101 | ||
102 | const struct lease *p; | |
103 | int cnt; | |
104 | ||
105 | /* INSIST(next != NULL); */ | |
106 | /* INSIST(associated_ips != NULL); */ | |
107 | ||
108 | if (lease == NULL) { | |
109 | return 0; | |
110 | } | |
111 | ||
112 | cnt = 0; | |
113 | for (p=lease; p != NULL; p=next(p)) { | |
114 | if ((p->binding_state == FTS_ACTIVE) && (p != newest)) { | |
115 | if (cnt < associated_ips_size) { | |
116 | memcpy(&associated_ips[cnt], | |
117 | p->ip_addr.iabuf, | |
118 | sizeof(associated_ips[cnt])); | |
119 | } | |
120 | cnt++; | |
121 | } | |
122 | } | |
123 | return cnt; | |
124 | } | |
125 | ||
126 | ||
127 | void | |
128 | dhcpleasequery(struct packet *packet, int ms_nulltp) { | |
129 | char msgbuf[256]; | |
130 | char dbg_info[128]; | |
131 | struct iaddr cip; | |
132 | struct iaddr gip; | |
133 | struct data_string uid; | |
134 | struct hardware h; | |
135 | struct lease *tmp_lease; | |
136 | struct lease *lease; | |
137 | int want_associated_ip; | |
138 | int assoc_ip_cnt; | |
20ae1aff | 139 | u_int32_t assoc_ips[40]; /* XXXSK: arbitrary maximum number of IPs */ |
6d103865 SK |
140 | const int nassoc_ips = sizeof(assoc_ips) / sizeof(assoc_ips[0]); |
141 | ||
142 | unsigned char dhcpMsgType; | |
143 | const char *dhcp_msg_type_name; | |
144 | struct subnet *subnet; | |
656b1ece | 145 | struct group *relay_group; |
6d103865 SK |
146 | struct option_state *options; |
147 | struct option_cache *oc; | |
148 | int allow_leasequery; | |
149 | int ignorep; | |
150 | u_int32_t lease_duration; | |
151 | u_int32_t time_renewal; | |
152 | u_int32_t time_rebinding; | |
153 | u_int32_t time_expiry; | |
154 | u_int32_t client_last_transaction_time; | |
155 | struct sockaddr_in to; | |
156 | struct in_addr siaddr; | |
157 | struct data_string prl; | |
158 | struct data_string *prl_ptr; | |
159 | ||
160 | int i; | |
161 | struct interface_info *interface; | |
162 | ||
163 | /* INSIST(packet != NULL); */ | |
164 | ||
165 | /* | |
166 | * Prepare log information. | |
167 | */ | |
168 | snprintf(msgbuf, sizeof(msgbuf), | |
169 | "DHCPLEASEQUERY from %s", inet_ntoa(packet->raw->giaddr)); | |
170 | ||
171 | /* | |
172 | * We can't reply if there is no giaddr field. | |
173 | */ | |
785c1a51 FD |
174 | /* |
175 | * Note: this makes DHCPv4-over-DHCPv6 always fail but it should not | |
176 | * really be a problem because it is not a specified use case | |
177 | * (or even one that makes sense). | |
178 | */ | |
6d103865 SK |
179 | if (!packet->raw->giaddr.s_addr) { |
180 | log_info("%s: missing giaddr, ciaddr is %s, no reply sent", | |
181 | msgbuf, inet_ntoa(packet->raw->ciaddr)); | |
182 | return; | |
183 | } | |
184 | ||
185 | /* | |
656b1ece TM |
186 | * Initially we use the 'giaddr' subnet options scope to determine if |
187 | * the giaddr-identified relay agent is permitted to perform a | |
188 | * leasequery. The subnet is not required, and may be omitted, in | |
189 | * which case we are essentially interrogating the root options class | |
190 | * to find a globally permit. | |
6d103865 SK |
191 | */ |
192 | gip.len = sizeof(packet->raw->giaddr); | |
193 | memcpy(gip.iabuf, &packet->raw->giaddr, sizeof(packet->raw->giaddr)); | |
194 | ||
195 | subnet = NULL; | |
196 | find_subnet(&subnet, gip, MDL); | |
656b1ece TM |
197 | if (subnet != NULL) |
198 | relay_group = subnet->group; | |
199 | else | |
200 | relay_group = root_group; | |
201 | ||
202 | subnet_dereference(&subnet, MDL); | |
6d103865 SK |
203 | |
204 | options = NULL; | |
205 | if (!option_state_allocate(&options, MDL)) { | |
6d103865 SK |
206 | log_error("No memory for option state."); |
207 | log_info("%s: out of memory, no reply sent", msgbuf); | |
208 | return; | |
209 | } | |
210 | ||
a7341359 SR |
211 | execute_statements_in_scope(NULL, packet, NULL, NULL, packet->options, |
212 | options, &global_scope, relay_group, | |
213 | NULL, NULL); | |
656b1ece | 214 | |
6d103865 | 215 | for (i=packet->class_count-1; i>=0; i--) { |
a7341359 SR |
216 | execute_statements_in_scope(NULL, packet, NULL, NULL, |
217 | packet->options, options, | |
6d103865 SK |
218 | &global_scope, |
219 | packet->classes[i]->group, | |
a7341359 | 220 | relay_group, NULL); |
6d103865 SK |
221 | } |
222 | ||
6d103865 SK |
223 | /* |
224 | * Because LEASEQUERY has some privacy concerns, default to deny. | |
225 | */ | |
226 | allow_leasequery = 0; | |
227 | ||
228 | /* | |
20ae1aff | 229 | * See if we are authorized to do LEASEQUERY. |
6d103865 SK |
230 | */ |
231 | oc = lookup_option(&server_universe, options, SV_LEASEQUERY); | |
232 | if (oc != NULL) { | |
233 | allow_leasequery = evaluate_boolean_option_cache(&ignorep, | |
234 | packet, NULL, NULL, packet->options, | |
235 | options, &global_scope, oc, MDL); | |
236 | } | |
237 | ||
238 | if (!allow_leasequery) { | |
239 | log_info("%s: LEASEQUERY not allowed, query ignored", msgbuf); | |
240 | option_state_dereference(&options, MDL); | |
241 | return; | |
242 | } | |
656b1ece | 243 | |
6d103865 SK |
244 | |
245 | /* | |
246 | * Copy out the client IP address. | |
247 | */ | |
248 | cip.len = sizeof(packet->raw->ciaddr); | |
249 | memcpy(cip.iabuf, &packet->raw->ciaddr, sizeof(packet->raw->ciaddr)); | |
250 | ||
251 | /* | |
252 | * If the client IP address is valid (not all zero), then we | |
253 | * are looking for information about that IP address. | |
254 | */ | |
255 | assoc_ip_cnt = 0; | |
27837f95 | 256 | lease = tmp_lease = NULL; |
6d103865 SK |
257 | if (memcmp(cip.iabuf, "\0\0\0", 4)) { |
258 | ||
259 | want_associated_ip = 0; | |
260 | ||
261 | snprintf(dbg_info, sizeof(dbg_info), "IP %s", piaddr(cip)); | |
262 | find_lease_by_ip_addr(&lease, cip, MDL); | |
263 | ||
264 | ||
265 | } else { | |
266 | ||
267 | want_associated_ip = 1; | |
268 | ||
269 | /* | |
270 | * If the client IP address is all zero, then we will | |
271 | * either look up by the client identifier (if we have | |
272 | * one), or by the MAC address. | |
273 | */ | |
274 | ||
275 | memset(&uid, 0, sizeof(uid)); | |
276 | if (get_option(&uid, | |
277 | &dhcp_universe, | |
278 | packet, | |
279 | NULL, | |
280 | NULL, | |
281 | packet->options, | |
282 | NULL, | |
283 | packet->options, | |
284 | &global_scope, | |
285 | DHO_DHCP_CLIENT_IDENTIFIER, | |
286 | MDL)) { | |
287 | ||
288 | snprintf(dbg_info, | |
289 | sizeof(dbg_info), | |
290 | "client-id %s", | |
291 | print_hex_1(uid.len, uid.data, 60)); | |
292 | ||
293 | find_lease_by_uid(&tmp_lease, uid.data, uid.len, MDL); | |
294 | data_string_forget(&uid, MDL); | |
295 | get_newest_lease(&lease, tmp_lease, next_uid); | |
296 | assoc_ip_cnt = get_associated_ips(tmp_lease, | |
297 | next_uid, | |
298 | lease, | |
299 | assoc_ips, | |
300 | nassoc_ips); | |
301 | ||
302 | } else { | |
303 | ||
304 | if (packet->raw->hlen+1 > sizeof(h.hbuf)) { | |
305 | log_info("%s: hardware length too long, " | |
306 | "no reply sent", msgbuf); | |
307 | option_state_dereference(&options, MDL); | |
308 | return; | |
309 | } | |
310 | ||
311 | h.hlen = packet->raw->hlen + 1; | |
312 | h.hbuf[0] = packet->raw->htype; | |
313 | memcpy(&h.hbuf[1], | |
314 | packet->raw->chaddr, | |
315 | packet->raw->hlen); | |
316 | ||
317 | snprintf(dbg_info, | |
318 | sizeof(dbg_info), | |
319 | "MAC address %s", | |
320 | print_hw_addr(h.hbuf[0], | |
321 | h.hlen - 1, | |
322 | &h.hbuf[1])); | |
323 | ||
324 | find_lease_by_hw_addr(&tmp_lease, h.hbuf, h.hlen, MDL); | |
325 | get_newest_lease(&lease, tmp_lease, next_hw); | |
326 | assoc_ip_cnt = get_associated_ips(tmp_lease, | |
327 | next_hw, | |
328 | lease, | |
329 | assoc_ips, | |
330 | nassoc_ips); | |
331 | ||
332 | } | |
333 | ||
334 | lease_dereference(&tmp_lease, MDL); | |
335 | ||
336 | if (lease != NULL) { | |
337 | memcpy(&packet->raw->ciaddr, | |
338 | lease->ip_addr.iabuf, | |
339 | sizeof(packet->raw->ciaddr)); | |
340 | } | |
341 | ||
342 | /* | |
343 | * Log if we have too many IP addresses associated | |
344 | * with this client. | |
345 | */ | |
346 | if (want_associated_ip && (assoc_ip_cnt > nassoc_ips)) { | |
347 | log_info("%d IP addresses associated with %s, " | |
348 | "only %d sent in reply.", | |
349 | assoc_ip_cnt, dbg_info, nassoc_ips); | |
350 | } | |
351 | } | |
352 | ||
353 | /* | |
354 | * We now know the query target too, so can report this in | |
355 | * our log message. | |
356 | */ | |
357 | snprintf(msgbuf, sizeof(msgbuf), | |
358 | "DHCPLEASEQUERY from %s for %s", | |
359 | inet_ntoa(packet->raw->giaddr), dbg_info); | |
360 | ||
361 | /* | |
362 | * Figure our our return type. | |
363 | */ | |
364 | if (lease == NULL) { | |
365 | dhcpMsgType = DHCPLEASEUNKNOWN; | |
366 | dhcp_msg_type_name = "DHCPLEASEUNKNOWN"; | |
367 | } else { | |
368 | if (lease->binding_state == FTS_ACTIVE) { | |
369 | dhcpMsgType = DHCPLEASEACTIVE; | |
370 | dhcp_msg_type_name = "DHCPLEASEACTIVE"; | |
371 | } else { | |
372 | dhcpMsgType = DHCPLEASEUNASSIGNED; | |
373 | dhcp_msg_type_name = "DHCPLEASEUNASSIGNED"; | |
374 | } | |
375 | } | |
376 | ||
377 | /* | |
378 | * Set options that only make sense if we have an active lease. | |
379 | */ | |
380 | ||
381 | if (dhcpMsgType == DHCPLEASEACTIVE) | |
382 | { | |
656b1ece TM |
383 | /* |
384 | * RFC 4388 uses the PRL to request options for the agent to | |
385 | * receive that are "about" the client. It is confusing | |
386 | * because in some cases it wants to know what was sent to | |
387 | * the client (lease times, adjusted), and in others it wants | |
388 | * to know information the client sent. You're supposed to | |
389 | * know this on a case-by-case basis. | |
390 | * | |
391 | * "Name servers", "domain name", and the like from the relay | |
392 | * agent's scope seems less than useful. Our options are to | |
393 | * restart the option cache from the lease's best point of view | |
394 | * (execute statements from the lease pool's group), or to | |
395 | * simply restart the option cache from empty. | |
396 | * | |
397 | * I think restarting the option cache from empty best | |
398 | * approaches RFC 4388's intent; specific options are included. | |
399 | */ | |
400 | option_state_dereference(&options, MDL); | |
401 | ||
402 | if (!option_state_allocate(&options, MDL)) { | |
403 | log_error("%s: out of memory, no reply sent", msgbuf); | |
404 | lease_dereference(&lease, MDL); | |
405 | return; | |
406 | } | |
6d103865 SK |
407 | |
408 | /* | |
409 | * Set the hardware address fields. | |
410 | */ | |
411 | ||
412 | packet->raw->hlen = lease->hardware_addr.hlen - 1; | |
413 | packet->raw->htype = lease->hardware_addr.hbuf[0]; | |
414 | memcpy(packet->raw->chaddr, | |
415 | &lease->hardware_addr.hbuf[1], | |
416 | sizeof(packet->raw->chaddr)); | |
417 | ||
418 | /* | |
419 | * Set client identifier option. | |
420 | */ | |
421 | if (lease->uid_len > 0) { | |
422 | if (!add_option(options, | |
423 | DHO_DHCP_CLIENT_IDENTIFIER, | |
424 | lease->uid, | |
425 | lease->uid_len)) { | |
426 | option_state_dereference(&options, MDL); | |
427 | lease_dereference(&lease, MDL); | |
428 | log_info("%s: out of memory, no reply sent", | |
429 | msgbuf); | |
430 | return; | |
431 | } | |
432 | } | |
433 | ||
434 | ||
435 | /* | |
436 | * Calculate T1 and T2, the times when the client | |
437 | * tries to extend its lease on its networking | |
438 | * address. | |
439 | * These seem to be hard-coded in ISC DHCP, to 0.5 and | |
440 | * 0.875 of the lease time. | |
441 | */ | |
442 | ||
443 | lease_duration = lease->ends - lease->starts; | |
444 | time_renewal = lease->starts + | |
445 | (lease_duration / 2); | |
446 | time_rebinding = lease->starts + | |
447 | (lease_duration / 2) + | |
448 | (lease_duration / 4) + | |
449 | (lease_duration / 8); | |
450 | ||
451 | if (time_renewal > cur_time) { | |
d289ee68 | 452 | time_renewal = htonl(time_renewal - cur_time); |
656b1ece | 453 | |
6d103865 SK |
454 | if (!add_option(options, |
455 | DHO_DHCP_RENEWAL_TIME, | |
456 | &time_renewal, | |
457 | sizeof(time_renewal))) { | |
458 | option_state_dereference(&options, MDL); | |
459 | lease_dereference(&lease, MDL); | |
460 | log_info("%s: out of memory, no reply sent", | |
461 | msgbuf); | |
462 | return; | |
463 | } | |
464 | } | |
465 | ||
466 | if (time_rebinding > cur_time) { | |
467 | time_rebinding = htonl(time_rebinding - cur_time); | |
656b1ece | 468 | |
6d103865 SK |
469 | if (!add_option(options, |
470 | DHO_DHCP_REBINDING_TIME, | |
471 | &time_rebinding, | |
472 | sizeof(time_rebinding))) { | |
473 | option_state_dereference(&options, MDL); | |
474 | lease_dereference(&lease, MDL); | |
475 | log_info("%s: out of memory, no reply sent", | |
476 | msgbuf); | |
477 | return; | |
478 | } | |
479 | } | |
480 | ||
481 | if (lease->ends > cur_time) { | |
482 | time_expiry = htonl(lease->ends - cur_time); | |
d289ee68 | 483 | |
6d103865 SK |
484 | if (!add_option(options, |
485 | DHO_DHCP_LEASE_TIME, | |
486 | &time_expiry, | |
487 | sizeof(time_expiry))) { | |
488 | option_state_dereference(&options, MDL); | |
489 | lease_dereference(&lease, MDL); | |
490 | log_info("%s: out of memory, no reply sent", | |
491 | msgbuf); | |
492 | return; | |
493 | } | |
494 | } | |
495 | ||
656b1ece TM |
496 | /* Supply the Vendor-Class-Identifier. */ |
497 | if (lease->scope != NULL) { | |
498 | struct data_string vendor_class; | |
499 | ||
500 | memset(&vendor_class, 0, sizeof(vendor_class)); | |
501 | ||
502 | if (find_bound_string(&vendor_class, lease->scope, | |
503 | "vendor-class-identifier")) { | |
504 | if (!add_option(options, | |
505 | DHO_VENDOR_CLASS_IDENTIFIER, | |
506 | (void *)vendor_class.data, | |
507 | vendor_class.len)) { | |
508 | option_state_dereference(&options, | |
509 | MDL); | |
510 | lease_dereference(&lease, MDL); | |
511 | log_error("%s: error adding vendor " | |
512 | "class identifier, no reply " | |
513 | "sent", msgbuf); | |
514 | data_string_forget(&vendor_class, MDL); | |
515 | return; | |
516 | } | |
517 | data_string_forget(&vendor_class, MDL); | |
518 | } | |
519 | } | |
6d103865 SK |
520 | |
521 | /* | |
522 | * Set the relay agent info. | |
656b1ece TM |
523 | * |
524 | * Note that because agent info is appended without regard | |
525 | * to the PRL in cons_options(), this will be sent as the | |
526 | * last option in the packet whether it is listed on PRL or | |
527 | * not. | |
6d103865 SK |
528 | */ |
529 | ||
530 | if (lease->agent_options != NULL) { | |
531 | int idx = agent_universe.index; | |
532 | struct option_chain_head **tmp1 = | |
533 | (struct option_chain_head **) | |
534 | &(options->universes[idx]); | |
535 | struct option_chain_head *tmp2 = | |
536 | (struct option_chain_head *) | |
537 | lease->agent_options; | |
538 | ||
539 | option_chain_head_reference(tmp1, tmp2, MDL); | |
540 | } | |
541 | ||
542 | /* | |
543 | * Set the client last transaction time. | |
544 | * We check to make sure we have a timestamp. For | |
545 | * lease files that were saved before running a | |
546 | * timestamp-aware version of the server, this may | |
547 | * not be set. | |
548 | */ | |
549 | ||
550 | if (lease->cltt != MIN_TIME) { | |
551 | if (cur_time > lease->cltt) { | |
552 | client_last_transaction_time = | |
553 | htonl(cur_time - lease->cltt); | |
554 | } else { | |
555 | client_last_transaction_time = htonl(0); | |
556 | } | |
557 | if (!add_option(options, | |
558 | DHO_CLIENT_LAST_TRANSACTION_TIME, | |
559 | &client_last_transaction_time, | |
560 | sizeof(client_last_transaction_time))) { | |
561 | option_state_dereference(&options, MDL); | |
562 | lease_dereference(&lease, MDL); | |
563 | log_info("%s: out of memory, no reply sent", | |
564 | msgbuf); | |
565 | return; | |
566 | } | |
567 | } | |
568 | ||
569 | /* | |
570 | * Set associated IPs, if requested and there are some. | |
571 | */ | |
572 | if (want_associated_ip && (assoc_ip_cnt > 0)) { | |
573 | if (!add_option(options, | |
574 | DHO_ASSOCIATED_IP, | |
575 | assoc_ips, | |
576 | assoc_ip_cnt * sizeof(assoc_ips[0]))) { | |
577 | option_state_dereference(&options, MDL); | |
578 | lease_dereference(&lease, MDL); | |
579 | log_info("%s: out of memory, no reply sent", | |
580 | msgbuf); | |
581 | return; | |
582 | } | |
583 | } | |
584 | } | |
585 | ||
586 | /* | |
587 | * Set the message type. | |
588 | */ | |
589 | ||
590 | packet->raw->op = BOOTREPLY; | |
591 | ||
592 | /* | |
593 | * Set DHCP message type. | |
594 | */ | |
595 | if (!add_option(options, | |
596 | DHO_DHCP_MESSAGE_TYPE, | |
597 | &dhcpMsgType, | |
598 | sizeof(dhcpMsgType))) { | |
599 | option_state_dereference(&options, MDL); | |
600 | lease_dereference(&lease, MDL); | |
601 | log_info("%s: error adding option, no reply sent", msgbuf); | |
602 | return; | |
603 | } | |
604 | ||
605 | /* | |
606 | * Log the message we've received. | |
607 | */ | |
608 | log_info("%s", msgbuf); | |
609 | ||
610 | /* | |
611 | * Figure out which address to use to send from. | |
612 | */ | |
f8380d3f | 613 | get_server_source_address(&siaddr, options, options, packet); |
6d103865 SK |
614 | |
615 | /* | |
616 | * Set up the option buffer. | |
617 | */ | |
618 | ||
619 | memset(&prl, 0, sizeof(prl)); | |
620 | oc = lookup_option(&dhcp_universe, options, | |
621 | DHO_DHCP_PARAMETER_REQUEST_LIST); | |
622 | if (oc != NULL) { | |
623 | evaluate_option_cache(&prl, | |
624 | packet, | |
625 | NULL, | |
626 | NULL, | |
627 | packet->options, | |
628 | options, | |
629 | &global_scope, | |
630 | oc, | |
631 | MDL); | |
632 | } | |
633 | if (prl.len > 0) { | |
634 | prl_ptr = &prl; | |
635 | } else { | |
636 | prl_ptr = NULL; | |
637 | } | |
638 | ||
639 | packet->packet_length = cons_options(packet, | |
640 | packet->raw, | |
641 | lease, | |
642 | NULL, | |
643 | 0, | |
644 | packet->options, | |
645 | options, | |
646 | &global_scope, | |
647 | 0, | |
648 | 0, | |
649 | 0, | |
650 | prl_ptr, | |
651 | NULL); | |
652 | ||
653 | data_string_forget(&prl, MDL); /* SK: safe, even if empty */ | |
654 | option_state_dereference(&options, MDL); | |
655 | lease_dereference(&lease, MDL); | |
656 | ||
657 | to.sin_family = AF_INET; | |
658 | #ifdef HAVE_SA_LEN | |
659 | to.sin_len = sizeof(to); | |
660 | #endif | |
661 | memset(to.sin_zero, 0, sizeof(to.sin_zero)); | |
662 | ||
663 | /* | |
664 | * Leasequery packets are be sent to the gateway address. | |
665 | */ | |
666 | to.sin_addr = packet->raw->giaddr; | |
667 | if (packet->raw->giaddr.s_addr != htonl(INADDR_LOOPBACK)) { | |
668 | to.sin_port = local_port; | |
669 | } else { | |
670 | to.sin_port = remote_port; /* XXXSK: For debugging. */ | |
671 | } | |
672 | ||
673 | /* | |
674 | * The fallback_interface lets us send with a real IP | |
675 | * address. The packet interface sends from all-zeros. | |
676 | */ | |
677 | if (fallback_interface != NULL) { | |
678 | interface = fallback_interface; | |
679 | } else { | |
680 | interface = packet->interface; | |
681 | } | |
682 | ||
683 | /* | |
684 | * Report what we're sending. | |
685 | */ | |
686 | log_info("%s to %s for %s (%d associated IPs)", | |
687 | dhcp_msg_type_name, | |
688 | inet_ntoa(to.sin_addr), dbg_info, assoc_ip_cnt); | |
689 | ||
690 | send_packet(interface, | |
691 | NULL, | |
692 | packet->raw, | |
693 | packet->packet_length, | |
694 | siaddr, | |
695 | &to, | |
696 | NULL); | |
697 | } | |
698 | ||
37ec5845 FD |
699 | #ifdef DHCPv6 |
700 | ||
701 | /* | |
702 | * TODO: RFC5007 query-by-clientid. | |
703 | * | |
704 | * TODO: RFC5007 look at the pools according to the link-address. | |
705 | * | |
706 | * TODO: get fixed leases too. | |
707 | * | |
708 | * TODO: RFC5007 ORO in query-options. | |
709 | * | |
37ec5845 FD |
710 | * TODO: RFC5007 lq-relay-data. |
711 | * | |
712 | * TODO: RFC5007 lq-client-link. | |
713 | * | |
714 | * Note: the code is still nearly compliant and usable for the target | |
715 | * case with these missing features! | |
716 | */ | |
717 | ||
718 | /* | |
719 | * The structure to handle a leasequery. | |
720 | */ | |
721 | struct lq6_state { | |
722 | struct packet *packet; | |
723 | struct data_string client_id; | |
724 | struct data_string server_id; | |
725 | struct data_string lq_query; | |
726 | uint8_t query_type; | |
727 | struct in6_addr link_addr; | |
728 | struct option_state *query_opts; | |
729 | ||
730 | struct option_state *reply_opts; | |
731 | unsigned cursor; | |
732 | union reply_buffer { | |
733 | unsigned char data[65536]; | |
734 | struct dhcpv6_packet reply; | |
735 | } buf; | |
736 | }; | |
737 | ||
738 | /* | |
739 | * Options that we want to send. | |
740 | */ | |
741 | static const int required_opts_lq[] = { | |
742 | D6O_CLIENTID, | |
743 | D6O_SERVERID, | |
744 | D6O_STATUS_CODE, | |
745 | D6O_CLIENT_DATA, | |
746 | D6O_LQ_RELAY_DATA, | |
747 | D6O_LQ_CLIENT_LINK, | |
748 | 0 | |
749 | }; | |
750 | static const int required_opt_CLIENT_DATA[] = { | |
751 | D6O_CLIENTID, | |
752 | D6O_IAADDR, | |
753 | D6O_IAPREFIX, | |
754 | D6O_CLT_TIME, | |
755 | 0 | |
756 | }; | |
757 | ||
758 | /* | |
759 | * Get the lq-query option from the packet. | |
760 | */ | |
761 | static isc_result_t | |
762 | get_lq_query(struct lq6_state *lq) | |
763 | { | |
764 | struct data_string *lq_query = &lq->lq_query; | |
765 | struct packet *packet = lq->packet; | |
766 | struct option_cache *oc; | |
767 | ||
768 | /* | |
769 | * Verify our lq_query structure is empty. | |
770 | */ | |
771 | if ((lq_query->data != NULL) || (lq_query->len != 0)) { | |
98bf1607 | 772 | return DHCP_R_INVALIDARG; |
37ec5845 FD |
773 | } |
774 | ||
775 | oc = lookup_option(&dhcpv6_universe, packet->options, D6O_LQ_QUERY); | |
776 | if (oc == NULL) { | |
777 | return ISC_R_NOTFOUND; | |
778 | } | |
779 | ||
780 | if (!evaluate_option_cache(lq_query, packet, NULL, NULL, | |
781 | packet->options, NULL, | |
782 | &global_scope, oc, MDL)) { | |
783 | return ISC_R_FAILURE; | |
784 | } | |
785 | ||
786 | return ISC_R_SUCCESS; | |
787 | } | |
788 | ||
789 | /* | |
790 | * Message validation, RFC 5007 section 4.2.1: | |
791 | * dhcpv6.c:valid_client_msg() - unicast + lq-query option. | |
792 | */ | |
793 | static int | |
794 | valid_query_msg(struct lq6_state *lq) { | |
795 | struct packet *packet = lq->packet; | |
796 | int ret_val = 0; | |
797 | struct option_cache *oc; | |
798 | ||
799 | /* INSIST((lq != NULL) || (packet != NULL)); */ | |
800 | ||
801 | switch (get_client_id(packet, &lq->client_id)) { | |
802 | case ISC_R_SUCCESS: | |
803 | break; | |
804 | case ISC_R_NOTFOUND: | |
805 | log_debug("Discarding %s from %s; " | |
806 | "client identifier missing", | |
807 | dhcpv6_type_names[packet->dhcpv6_msg_type], | |
808 | piaddr(packet->client_addr)); | |
809 | goto exit; | |
810 | default: | |
811 | log_error("Error processing %s from %s; " | |
812 | "unable to evaluate Client Identifier", | |
813 | dhcpv6_type_names[packet->dhcpv6_msg_type], | |
814 | piaddr(packet->client_addr)); | |
815 | goto exit; | |
816 | } | |
817 | ||
818 | oc = lookup_option(&dhcpv6_universe, packet->options, D6O_SERVERID); | |
819 | if (oc != NULL) { | |
820 | if (evaluate_option_cache(&lq->server_id, packet, NULL, NULL, | |
821 | packet->options, NULL, | |
822 | &global_scope, oc, MDL)) { | |
823 | log_debug("Discarding %s from %s; " | |
824 | "server identifier found " | |
825 | "(CLIENTID %s, SERVERID %s)", | |
826 | dhcpv6_type_names[packet->dhcpv6_msg_type], | |
827 | piaddr(packet->client_addr), | |
828 | print_hex_1(lq->client_id.len, | |
829 | lq->client_id.data, 60), | |
830 | print_hex_2(lq->server_id.len, | |
831 | lq->server_id.data, 60)); | |
832 | } else { | |
833 | log_debug("Discarding %s from %s; " | |
834 | "server identifier found " | |
835 | "(CLIENTID %s)", | |
836 | dhcpv6_type_names[packet->dhcpv6_msg_type], | |
837 | print_hex_1(lq->client_id.len, | |
838 | lq->client_id.data, 60), | |
839 | piaddr(packet->client_addr)); | |
840 | } | |
841 | goto exit; | |
842 | } | |
843 | ||
844 | switch (get_lq_query(lq)) { | |
845 | case ISC_R_SUCCESS: | |
846 | break; | |
847 | case ISC_R_NOTFOUND: | |
848 | log_debug("Discarding %s from %s; lq-query missing", | |
849 | dhcpv6_type_names[packet->dhcpv6_msg_type], | |
850 | piaddr(packet->client_addr)); | |
851 | goto exit; | |
852 | default: | |
853 | log_error("Error processing %s from %s; " | |
854 | "unable to evaluate LQ-Query", | |
855 | dhcpv6_type_names[packet->dhcpv6_msg_type], | |
856 | piaddr(packet->client_addr)); | |
857 | goto exit; | |
858 | } | |
859 | ||
860 | /* looks good */ | |
861 | ret_val = 1; | |
862 | ||
863 | exit: | |
864 | if (!ret_val) { | |
865 | if (lq->client_id.len > 0) { | |
866 | data_string_forget(&lq->client_id, MDL); | |
867 | } | |
868 | if (lq->server_id.len > 0) { | |
869 | data_string_forget(&lq->server_id, MDL); | |
870 | } | |
871 | if (lq->lq_query.len > 0) { | |
872 | data_string_forget(&lq->lq_query, MDL); | |
873 | } | |
874 | } | |
875 | return ret_val; | |
876 | } | |
877 | ||
878 | /* | |
879 | * Set an error in a status-code option (from set_status_code). | |
880 | */ | |
881 | static int | |
882 | set_error(struct lq6_state *lq, u_int16_t code, const char *message) { | |
883 | struct data_string d; | |
884 | int ret_val; | |
885 | ||
886 | memset(&d, 0, sizeof(d)); | |
887 | d.len = sizeof(code) + strlen(message); | |
888 | if (!buffer_allocate(&d.buffer, d.len, MDL)) { | |
889 | log_fatal("set_error: no memory for status code."); | |
890 | } | |
891 | d.data = d.buffer->data; | |
892 | putUShort(d.buffer->data, code); | |
893 | memcpy(d.buffer->data + sizeof(code), message, d.len - sizeof(code)); | |
894 | if (!save_option_buffer(&dhcpv6_universe, lq->reply_opts, | |
895 | d.buffer, (unsigned char *)d.data, d.len, | |
896 | D6O_STATUS_CODE, 0)) { | |
897 | log_error("set_error: error saving status code."); | |
898 | ret_val = 0; | |
899 | } else { | |
900 | ret_val = 1; | |
901 | } | |
902 | data_string_forget(&d, MDL); | |
903 | return ret_val; | |
904 | } | |
905 | ||
906 | /* | |
907 | * Process a by-address lease query. | |
908 | */ | |
909 | static int | |
910 | process_lq_by_address(struct lq6_state *lq) { | |
911 | struct packet *packet = lq->packet; | |
912 | struct option_cache *oc; | |
913 | struct ipv6_pool *pool = NULL; | |
914 | struct data_string data; | |
915 | struct in6_addr addr; | |
1d17db44 | 916 | struct iasubopt *iaaddr = NULL; |
37ec5845 FD |
917 | struct option_state *opt_state = NULL; |
918 | u_int32_t lifetime; | |
919 | unsigned opt_cursor; | |
920 | int ret_val = 0; | |
921 | ||
922 | /* | |
923 | * Get the IAADDR. | |
924 | */ | |
925 | oc = lookup_option(&dhcpv6_universe, lq->query_opts, D6O_IAADDR); | |
926 | if (oc == NULL) { | |
927 | if (!set_error(lq, STATUS_MalformedQuery, | |
928 | "No OPTION_IAADDR.")) { | |
929 | log_error("process_lq_by_address: unable " | |
930 | "to set MalformedQuery status code."); | |
931 | return 0; | |
932 | } | |
933 | return 1; | |
934 | } | |
935 | memset(&data, 0, sizeof(data)); | |
936 | if (!evaluate_option_cache(&data, packet, | |
937 | NULL, NULL, | |
938 | lq->query_opts, NULL, | |
939 | &global_scope, oc, MDL) || | |
940 | (data.len < IAADDR_OFFSET)) { | |
941 | log_error("process_lq_by_address: error evaluating IAADDR."); | |
942 | goto exit; | |
943 | } | |
944 | memcpy(&addr, data.data, sizeof(addr)); | |
945 | data_string_forget(&data, MDL); | |
946 | ||
947 | /* | |
948 | * Find the lease. | |
949 | * Note the RFC 5007 says to use the link-address to find the link | |
950 | * or the ia-aadr when it is :: but in any case the ia-addr has | |
951 | * to be on the link, so we ignore the link-address here. | |
952 | */ | |
6027d38f | 953 | if (find_ipv6_pool(&pool, D6O_IA_NA, &addr) != ISC_R_SUCCESS) { |
37ec5845 FD |
954 | if (!set_error(lq, STATUS_NotConfigured, |
955 | "Address not in a pool.")) { | |
956 | log_error("process_lq_by_address: unable " | |
957 | "to set NotConfigured status code."); | |
958 | goto exit; | |
959 | } | |
960 | ret_val = 1; | |
961 | goto exit; | |
962 | } | |
1d17db44 FD |
963 | if (iasubopt_hash_lookup(&iaaddr, pool->leases, &addr, |
964 | sizeof(addr), MDL) == 0) { | |
37ec5845 FD |
965 | ret_val = 1; |
966 | goto exit; | |
967 | } | |
968 | if ((iaaddr == NULL) || (iaaddr->state != FTS_ACTIVE) || | |
6027d38f | 969 | (iaaddr->ia == NULL) || (iaaddr->ia->iaid_duid.len <= 4)) { |
37ec5845 FD |
970 | ret_val = 1; |
971 | goto exit; | |
972 | } | |
973 | ||
974 | /* | |
975 | * Build the client-data option (with client-id, ia-addr and clt-time). | |
976 | */ | |
977 | if (!option_state_allocate(&opt_state, MDL)) { | |
978 | log_error("process_lq_by_address: " | |
979 | "no memory for option state."); | |
980 | goto exit; | |
981 | } | |
982 | ||
6027d38f | 983 | data_string_copy(&data, &iaaddr->ia->iaid_duid, MDL); |
37ec5845 FD |
984 | data.data += 4; |
985 | data.len -= 4; | |
986 | if (!save_option_buffer(&dhcpv6_universe, opt_state, | |
987 | NULL, (unsigned char *)data.data, data.len, | |
988 | D6O_CLIENTID, 0)) { | |
989 | log_error("process_lq_by_address: error saving client ID."); | |
990 | goto exit; | |
991 | } | |
992 | data_string_forget(&data, MDL); | |
993 | ||
994 | data.len = IAADDR_OFFSET; | |
995 | if (!buffer_allocate(&data.buffer, data.len, MDL)) { | |
996 | log_error("process_lq_by_address: no memory for ia-addr."); | |
997 | goto exit; | |
998 | } | |
999 | data.data = data.buffer->data; | |
1000 | memcpy(data.buffer->data, &iaaddr->addr, 16); | |
1acab09f | 1001 | lifetime = iaaddr->prefer; |
37ec5845 | 1002 | putULong(data.buffer->data + 16, lifetime); |
1acab09f | 1003 | lifetime = iaaddr->valid; |
37ec5845 FD |
1004 | putULong(data.buffer->data + 20, lifetime); |
1005 | if (!save_option_buffer(&dhcpv6_universe, opt_state, | |
1006 | NULL, (unsigned char *)data.data, data.len, | |
1007 | D6O_IAADDR, 0)) { | |
1008 | log_error("process_lq_by_address: error saving ia-addr."); | |
1009 | goto exit; | |
1010 | } | |
1011 | data_string_forget(&data, MDL); | |
1012 | ||
1acab09f | 1013 | lifetime = htonl(iaaddr->ia->cltt); |
37ec5845 FD |
1014 | if (!save_option_buffer(&dhcpv6_universe, opt_state, |
1015 | NULL, (unsigned char *)&lifetime, 4, | |
1016 | D6O_CLT_TIME, 0)) { | |
1017 | log_error("process_lq_by_address: error saving clt time."); | |
1018 | goto exit; | |
1019 | } | |
1020 | ||
1021 | /* | |
1022 | * Store the client-data option. | |
1023 | */ | |
1024 | opt_cursor = lq->cursor; | |
1025 | putUShort(lq->buf.data + lq->cursor, (unsigned)D6O_CLIENT_DATA); | |
1026 | lq->cursor += 2; | |
1027 | /* Skip option length. */ | |
1028 | lq->cursor += 2; | |
1029 | ||
1030 | lq->cursor += store_options6((char *)lq->buf.data + lq->cursor, | |
1031 | sizeof(lq->buf) - lq->cursor, | |
1032 | opt_state, lq->packet, | |
1033 | required_opt_CLIENT_DATA, NULL); | |
1034 | /* Reset the length. */ | |
1035 | putUShort(lq->buf.data + opt_cursor + 2, | |
1036 | lq->cursor - (opt_cursor + 4)); | |
1037 | ||
1038 | /* Done. */ | |
1039 | ret_val = 1; | |
1040 | ||
1041 | exit: | |
1042 | if (data.data != NULL) | |
1043 | data_string_forget(&data, MDL); | |
1044 | if (pool != NULL) | |
1045 | ipv6_pool_dereference(&pool, MDL); | |
1046 | if (iaaddr != NULL) | |
1d17db44 | 1047 | iasubopt_dereference(&iaaddr, MDL); |
37ec5845 FD |
1048 | if (opt_state != NULL) |
1049 | option_state_dereference(&opt_state, MDL); | |
1050 | return ret_val; | |
1051 | } | |
1052 | ||
1053 | ||
1054 | /* | |
1055 | * Process a lease query. | |
1056 | */ | |
1057 | void | |
1058 | dhcpv6_leasequery(struct data_string *reply_ret, struct packet *packet) { | |
1059 | static struct lq6_state lq; | |
37ec5845 FD |
1060 | struct option_cache *oc; |
1061 | int allow_lq; | |
1062 | ||
1063 | /* | |
1064 | * Initialize the lease query state. | |
1065 | */ | |
1066 | lq.packet = NULL; | |
1067 | memset(&lq.client_id, 0, sizeof(lq.client_id)); | |
1068 | memset(&lq.server_id, 0, sizeof(lq.server_id)); | |
1069 | memset(&lq.lq_query, 0, sizeof(lq.lq_query)); | |
1070 | lq.query_opts = NULL; | |
1071 | lq.reply_opts = NULL; | |
1072 | packet_reference(&lq.packet, packet, MDL); | |
1073 | ||
1074 | /* | |
1075 | * Validate our input. | |
1076 | */ | |
1077 | if (!valid_query_msg(&lq)) { | |
1078 | goto exit; | |
1079 | } | |
1080 | ||
1081 | /* | |
1082 | * Prepare our reply. | |
1083 | */ | |
1084 | if (!option_state_allocate(&lq.reply_opts, MDL)) { | |
1085 | log_error("dhcpv6_leasequery: no memory for option state."); | |
1086 | goto exit; | |
1087 | } | |
1088 | execute_statements_in_scope(NULL, lq.packet, NULL, NULL, | |
1089 | lq.packet->options, lq.reply_opts, | |
a7341359 | 1090 | &global_scope, root_group, NULL, NULL); |
37ec5845 FD |
1091 | |
1092 | lq.buf.reply.msg_type = DHCPV6_LEASEQUERY_REPLY; | |
1093 | ||
1094 | memcpy(lq.buf.reply.transaction_id, | |
1095 | lq.packet->dhcpv6_transaction_id, | |
1096 | sizeof(lq.buf.reply.transaction_id)); | |
1097 | ||
1098 | /* | |
1099 | * Because LEASEQUERY has some privacy concerns, default to deny. | |
1100 | */ | |
1101 | allow_lq = 0; | |
1102 | ||
1103 | /* | |
1104 | * See if we are authorized to do LEASEQUERY. | |
1105 | */ | |
1106 | oc = lookup_option(&server_universe, lq.reply_opts, SV_LEASEQUERY); | |
1107 | if (oc != NULL) { | |
1108 | allow_lq = evaluate_boolean_option_cache(NULL, | |
1109 | lq.packet, | |
1110 | NULL, NULL, | |
1111 | lq.packet->options, | |
1112 | lq.reply_opts, | |
1113 | &global_scope, | |
1114 | oc, MDL); | |
1115 | } | |
1116 | ||
1117 | if (!allow_lq) { | |
1118 | log_info("dhcpv6_leasequery: not allowed, query ignored."); | |
1119 | goto exit; | |
1120 | } | |
1121 | ||
1122 | /* | |
1123 | * Same than transmission of REPLY message in RFC 3315: | |
1124 | * server-id | |
1125 | * client-id | |
1126 | */ | |
1127 | ||
1128 | oc = lookup_option(&dhcpv6_universe, lq.reply_opts, D6O_SERVERID); | |
1129 | if (oc == NULL) { | |
1130 | /* If not already in options, get from query then global. */ | |
1131 | if (lq.server_id.data == NULL) | |
1132 | copy_server_duid(&lq.server_id, MDL); | |
1133 | if (!save_option_buffer(&dhcpv6_universe, | |
1134 | lq.reply_opts, | |
1135 | NULL, | |
1136 | (unsigned char *)lq.server_id.data, | |
1137 | lq.server_id.len, | |
1138 | D6O_SERVERID, | |
1139 | 0)) { | |
1140 | log_error("dhcpv6_leasequery: " | |
1141 | "error saving server identifier."); | |
1142 | goto exit; | |
1143 | } | |
1144 | } | |
1145 | ||
1146 | if (!save_option_buffer(&dhcpv6_universe, | |
1147 | lq.reply_opts, | |
1148 | lq.client_id.buffer, | |
1149 | (unsigned char *)lq.client_id.data, | |
1150 | lq.client_id.len, | |
1151 | D6O_CLIENTID, | |
1152 | 0)) { | |
1153 | log_error("dhcpv6_leasequery: " | |
1154 | "error saving client identifier."); | |
1155 | goto exit; | |
1156 | } | |
1157 | ||
1158 | lq.cursor = 4; | |
1159 | ||
1160 | /* | |
1161 | * Decode the lq-query option. | |
1162 | */ | |
1163 | ||
1164 | if (lq.lq_query.len <= LQ_QUERY_OFFSET) { | |
1165 | if (!set_error(&lq, STATUS_MalformedQuery, | |
1166 | "OPTION_LQ_QUERY too short.")) { | |
1167 | log_error("dhcpv6_leasequery: unable " | |
1168 | "to set MalformedQuery status code."); | |
1169 | goto exit; | |
1170 | } | |
1171 | goto done; | |
1172 | } | |
1173 | ||
1174 | lq.query_type = lq.lq_query.data [0]; | |
1175 | memcpy(&lq.link_addr, lq.lq_query.data + 1, sizeof(lq.link_addr)); | |
1176 | switch (lq.query_type) { | |
1177 | case LQ6QT_BY_ADDRESS: | |
1178 | break; | |
1179 | case LQ6QT_BY_CLIENTID: | |
1180 | if (!set_error(&lq, STATUS_UnknownQueryType, | |
1181 | "QUERY_BY_CLIENTID not supported.")) { | |
1182 | log_error("dhcpv6_leasequery: unable to " | |
1183 | "set UnknownQueryType status code."); | |
1184 | goto exit; | |
1185 | } | |
1186 | goto done; | |
1187 | default: | |
1188 | if (!set_error(&lq, STATUS_UnknownQueryType, | |
1189 | "Unknown query-type.")) { | |
1190 | log_error("dhcpv6_leasequery: unable to " | |
1191 | "set UnknownQueryType status code."); | |
1192 | goto exit; | |
1193 | } | |
1194 | goto done; | |
1195 | } | |
1196 | ||
1197 | if (!option_state_allocate(&lq.query_opts, MDL)) { | |
1198 | log_error("dhcpv6_leasequery: no memory for option state."); | |
1199 | goto exit; | |
1200 | } | |
1201 | if (!parse_option_buffer(lq.query_opts, | |
1202 | lq.lq_query.data + LQ_QUERY_OFFSET, | |
1203 | lq.lq_query.len - LQ_QUERY_OFFSET, | |
1204 | &dhcpv6_universe)) { | |
1205 | log_error("dhcpv6_leasequery: error parsing query-options."); | |
1206 | if (!set_error(&lq, STATUS_MalformedQuery, | |
1207 | "Bad query-options.")) { | |
1208 | log_error("dhcpv6_leasequery: unable " | |
1209 | "to set MalformedQuery status code."); | |
1210 | goto exit; | |
1211 | } | |
1212 | goto done; | |
1213 | } | |
1214 | ||
1215 | /* Do it. */ | |
1216 | if (!process_lq_by_address(&lq)) | |
1217 | goto exit; | |
1218 | ||
1219 | done: | |
1220 | /* Store the options. */ | |
1221 | lq.cursor += store_options6((char *)lq.buf.data + lq.cursor, | |
1222 | sizeof(lq.buf) - lq.cursor, | |
1223 | lq.reply_opts, | |
1224 | lq.packet, | |
1225 | required_opts_lq, | |
1226 | NULL); | |
1227 | ||
1228 | /* Return our reply to the caller. */ | |
1229 | reply_ret->len = lq.cursor; | |
1230 | reply_ret->buffer = NULL; | |
1231 | if (!buffer_allocate(&reply_ret->buffer, lq.cursor, MDL)) { | |
1232 | log_fatal("dhcpv6_leasequery: no memory to store Reply."); | |
1233 | } | |
1234 | memcpy(reply_ret->buffer->data, lq.buf.data, lq.cursor); | |
1235 | reply_ret->data = reply_ret->buffer->data; | |
1236 | ||
1237 | exit: | |
1238 | /* Cleanup. */ | |
1239 | if (lq.packet != NULL) | |
1240 | packet_dereference(&lq.packet, MDL); | |
1241 | if (lq.client_id.data != NULL) | |
1242 | data_string_forget(&lq.client_id, MDL); | |
1243 | if (lq.server_id.data != NULL) | |
1244 | data_string_forget(&lq.server_id, MDL); | |
1245 | if (lq.lq_query.data != NULL) | |
1246 | data_string_forget(&lq.lq_query, MDL); | |
1247 | if (lq.query_opts != NULL) | |
1248 | option_state_dereference(&lq.query_opts, MDL); | |
1249 | if (lq.reply_opts != NULL) | |
1250 | option_state_dereference(&lq.reply_opts, MDL); | |
1251 | } | |
1252 | ||
1253 | #endif /* DHCPv6 */ |