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Commit | Line | Data |
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b992d7e2 DN |
1 | /* ddns.c |
2 | ||
3 | Dynamic DNS updates. */ | |
4 | ||
5 | /* | |
905c58b9 | 6 | * |
49a7fb58 | 7 | * Copyright (C) 2004-2022 Internet Systems Consortium, Inc. ("ISC") |
98311e4b | 8 | * Copyright (c) 2000-2003 by Internet Software Consortium |
b992d7e2 | 9 | * |
7512d88b TM |
10 | * This Source Code Form is subject to the terms of the Mozilla Public |
11 | * License, v. 2.0. If a copy of the MPL was not distributed with this | |
12 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. | |
b992d7e2 | 13 | * |
98311e4b DH |
14 | * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES |
15 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
16 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR | |
17 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
18 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
19 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT | |
20 | * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
b992d7e2 | 21 | * |
98311e4b | 22 | * Internet Systems Consortium, Inc. |
429a56d7 TM |
23 | * PO Box 360 |
24 | * Newmarket, NH 03857 USA | |
98311e4b | 25 | * <info@isc.org> |
2c85ac9b | 26 | * https://www.isc.org/ |
b992d7e2 | 27 | * |
98311e4b | 28 | * This software has been donated to Internet Systems Consortium |
0598e123 TL |
29 | * by Damien Neil of Nominum, Inc. |
30 | * | |
98311e4b | 31 | * To learn more about Internet Systems Consortium, see |
60bba434 | 32 | * ``https://www.isc.org/''. |
b992d7e2 DN |
33 | */ |
34 | ||
b992d7e2 | 35 | #include "dhcpd.h" |
98bf1607 | 36 | #include <dns/result.h> |
b992d7e2 | 37 | |
d7d9c0c7 SR |
38 | char *ddns_standard_tag = "ddns-dhcid"; |
39 | char *ddns_interim_tag = "ddns-txt"; | |
40 | ||
b992d7e2 DN |
41 | #ifdef NSUPDATE |
42 | ||
905c58b9 TM |
43 | #if defined (DEBUG_DNS_UPDATES) |
44 | static char* dump_ddns_cb_func(void *func); | |
45 | static char* dump_ddns_cb (dhcp_ddns_cb_t *ddns_cb); | |
46 | ||
47 | extern struct enumeration_value ddns_styles_values[]; | |
48 | #endif | |
49 | ||
98bf1607 SR |
50 | static void ddns_fwd_srv_connector(struct lease *lease, |
51 | struct iasubopt *lease6, | |
52 | struct binding_scope **inscope, | |
53 | dhcp_ddns_cb_t *ddns_cb, | |
54 | isc_result_t eresult); | |
55 | ||
905c58b9 TM |
56 | static void copy_conflict_flags(u_int16_t *target, u_int16_t source); |
57 | ||
58 | static void ddns_fwd_srv_add3(dhcp_ddns_cb_t *ddns_cb, isc_result_t eresult); | |
59 | ||
f1208e79 TM |
60 | /* |
61 | * ddns_cb_free() is part of common lib, while ia_* routines are known | |
62 | * only in the server. Use this wrapper instead of ddns_cb_free() directly. | |
63 | */ | |
64 | static void | |
65 | destroy_ddns_cb(struct dhcp_ddns_cb *ddns_cb, char* file, int line) { | |
66 | if (!ddns_cb) { | |
67 | return; | |
68 | } | |
69 | ||
70 | if (ddns_cb->fixed6_ia) { | |
71 | ia_dereference(&ddns_cb->fixed6_ia, MDL); | |
72 | } | |
73 | ||
74 | ddns_cb_free(ddns_cb, file, line); | |
75 | ||
76 | } | |
77 | ||
78 | ||
0598e123 TL |
79 | /* DN: No way of checking that there is enough space in a data_string's |
80 | buffer. Be certain to allocate enough! | |
385fcb27 | 81 | TL: This is why the expression evaluation code allocates a *new* |
0598e123 | 82 | data_string. :') */ |
b992d7e2 DN |
83 | static void data_string_append (struct data_string *ds1, |
84 | struct data_string *ds2) | |
85 | { | |
86 | memcpy (ds1 -> buffer -> data + ds1 -> len, | |
87 | ds2 -> data, | |
88 | ds2 -> len); | |
89 | ds1 -> len += ds2 -> len; | |
90 | } | |
91 | ||
b992d7e2 | 92 | |
98bd7ca0 DH |
93 | /* Determine what, if any, forward and reverse updates need to be |
94 | * performed, and carry them through. | |
95 | */ | |
96 | int | |
97 | ddns_updates(struct packet *packet, struct lease *lease, struct lease *old, | |
1d17db44 | 98 | struct iasubopt *lease6, struct iasubopt *old6, |
98bd7ca0 | 99 | struct option_state *options) |
b992d7e2 DN |
100 | { |
101 | unsigned long ddns_ttl = DEFAULT_DDNS_TTL; | |
102 | struct data_string ddns_hostname; | |
103 | struct data_string ddns_domainname; | |
478028e7 | 104 | struct data_string old_ddns_fwd_name; |
b992d7e2 | 105 | struct data_string ddns_fwd_name; |
b992d7e2 | 106 | struct data_string ddns_dhcid; |
98bf1607 | 107 | struct binding_scope **scope = NULL; |
b992d7e2 DN |
108 | struct data_string d1; |
109 | struct option_cache *oc; | |
110 | int s1, s2; | |
111 | int result = 0; | |
478028e7 TL |
112 | int server_updates_a = 1; |
113 | struct buffer *bp = (struct buffer *)0; | |
a396d25f | 114 | int ignorep = 0, client_ignorep = 0; |
98bd7ca0 DH |
115 | int rev_name_len; |
116 | int i; | |
b992d7e2 | 117 | |
98bf1607 SR |
118 | dhcp_ddns_cb_t *ddns_cb; |
119 | int do_remove = 0; | |
120 | ||
d7d9c0c7 SR |
121 | if ((ddns_update_style != DDNS_UPDATE_STYLE_STANDARD) && |
122 | (ddns_update_style != DDNS_UPDATE_STYLE_INTERIM)) | |
123 | return (0); | |
5fac73d6 | 124 | |
98bf1607 SR |
125 | /* |
126 | * sigh, I want to cancel any previous udpates before we do anything | |
127 | * else but this means we need to deal with the lease vs lease6 | |
128 | * question twice. | |
129 | * If there is a ddns request already outstanding cancel it. | |
130 | */ | |
131 | ||
98bd7ca0 | 132 | if (lease != NULL) { |
98bf1607 | 133 | if ((old != NULL) && (old->ddns_cb != NULL)) { |
87132514 | 134 | ddns_cancel(old->ddns_cb, MDL); |
98bf1607 SR |
135 | old->ddns_cb = NULL; |
136 | } | |
98bd7ca0 | 137 | } else if (lease6 != NULL) { |
98bf1607 | 138 | if ((old6 != NULL) && (old6->ddns_cb != NULL)) { |
87132514 | 139 | ddns_cancel(old6->ddns_cb, MDL); |
98bf1607 SR |
140 | old6->ddns_cb = NULL; |
141 | } | |
6705543f | 142 | } else { |
98bd7ca0 | 143 | log_fatal("Impossible condition at %s:%d.", MDL); |
6705543f | 144 | /* Silence compiler warnings. */ |
98bf1607 SR |
145 | result = 0; |
146 | return(0); | |
147 | } | |
148 | ||
149 | /* allocate our control block */ | |
150 | ddns_cb = ddns_cb_alloc(MDL); | |
151 | if (ddns_cb == NULL) { | |
152 | return(0); | |
153 | } | |
0ef9a46e SR |
154 | /* |
155 | * Assume that we shall update both the A and ptr records and, | |
905c58b9 | 156 | * as this is an update, set the active flag |
0ef9a46e SR |
157 | */ |
158 | ddns_cb->flags = DDNS_UPDATE_ADDR | DDNS_UPDATE_PTR | | |
159 | DDNS_ACTIVE_LEASE; | |
3221151b SR |
160 | |
161 | /* | |
162 | * For v4 we flag static leases so we don't try | |
163 | * and manipulate the lease later. For v6 we don't | |
164 | * get static leases and don't need to flag them. | |
165 | */ | |
98bf1607 SR |
166 | if (lease != NULL) { |
167 | scope = &(lease->scope); | |
168 | ddns_cb->address = lease->ip_addr; | |
3221151b SR |
169 | if (lease->flags & STATIC_LEASE) |
170 | ddns_cb->flags |= DDNS_STATIC_LEASE; | |
98bf1607 SR |
171 | } else if (lease6 != NULL) { |
172 | scope = &(lease6->scope); | |
173 | memcpy(ddns_cb->address.iabuf, lease6->addr.s6_addr, 16); | |
174 | ddns_cb->address.len = 16; | |
f1208e79 TM |
175 | |
176 | if (lease6->static_lease) { | |
177 | /* We add a reference to keep ia && iasubopt alive | |
178 | * since static v6s are retained anywhere */ | |
179 | ia_reference(&ddns_cb->fixed6_ia, lease6->ia, MDL); | |
180 | ddns_cb->flags |= DDNS_STATIC_LEASE; | |
181 | } | |
6705543f | 182 | } |
b992d7e2 | 183 | |
98bf1607 | 184 | memset (&d1, 0, sizeof(d1)); |
b992d7e2 DN |
185 | memset (&ddns_hostname, 0, sizeof (ddns_hostname)); |
186 | memset (&ddns_domainname, 0, sizeof (ddns_domainname)); | |
478028e7 | 187 | memset (&old_ddns_fwd_name, 0, sizeof (ddns_fwd_name)); |
b992d7e2 | 188 | memset (&ddns_fwd_name, 0, sizeof (ddns_fwd_name)); |
b992d7e2 DN |
189 | memset (&ddns_dhcid, 0, sizeof (ddns_dhcid)); |
190 | ||
478028e7 TL |
191 | /* If we are allowed to accept the client's update of its own A |
192 | record, see if the client wants to update its own A record. */ | |
98bd7ca0 | 193 | if (!(oc = lookup_option(&server_universe, options, |
a396d25f DH |
194 | SV_CLIENT_UPDATES)) || |
195 | evaluate_boolean_option_cache(&client_ignorep, packet, lease, NULL, | |
98bd7ca0 DH |
196 | packet->options, options, scope, |
197 | oc, MDL)) { | |
478028e7 TL |
198 | /* If there's no fqdn.no-client-update or if it's |
199 | nonzero, don't try to use the client-supplied | |
200 | XXX */ | |
ee83afae | 201 | if (!(oc = lookup_option (&fqdn_universe, packet -> options, |
98311e4b | 202 | FQDN_SERVER_UPDATE)) || |
98bd7ca0 DH |
203 | evaluate_boolean_option_cache(&ignorep, packet, lease, |
204 | NULL, packet->options, | |
205 | options, scope, oc, MDL)) | |
478028e7 | 206 | goto noclient; |
e9d45f83 TL |
207 | /* Win98 and Win2k will happily claim to be willing to |
208 | update an unqualified domain name. */ | |
209 | if (!(oc = lookup_option (&fqdn_universe, packet -> options, | |
210 | FQDN_DOMAINNAME))) | |
211 | goto noclient; | |
ee83afae | 212 | if (!(oc = lookup_option (&fqdn_universe, packet -> options, |
478028e7 | 213 | FQDN_FQDN)) || |
98bd7ca0 DH |
214 | !evaluate_option_cache(&ddns_fwd_name, packet, lease, |
215 | NULL, packet->options, | |
216 | options, scope, oc, MDL)) | |
478028e7 | 217 | goto noclient; |
98bf1607 | 218 | ddns_cb->flags &= ~DDNS_UPDATE_ADDR; |
478028e7 TL |
219 | server_updates_a = 0; |
220 | goto client_updates; | |
b992d7e2 | 221 | } |
478028e7 | 222 | noclient: |
98311e4b DH |
223 | /* If do-forward-updates is disabled, this basically means don't |
224 | do an update unless the client is participating, so if we get | |
225 | here and do-forward-updates is disabled, we can stop. */ | |
98bd7ca0 | 226 | if ((oc = lookup_option (&server_universe, options, |
98311e4b | 227 | SV_DO_FORWARD_UPDATES)) && |
98bd7ca0 DH |
228 | !evaluate_boolean_option_cache(&ignorep, packet, lease, |
229 | NULL, packet->options, | |
230 | options, scope, oc, MDL)) { | |
98bf1607 | 231 | goto out; |
98311e4b | 232 | } |
b992d7e2 | 233 | |
ec64b462 TL |
234 | /* If it's a static lease, then don't do the DNS update unless we're |
235 | specifically configured to do so. If the client asked to do its | |
236 | own update and we allowed that, we don't do this test. */ | |
98bd7ca0 DH |
237 | /* XXX: note that we cannot detect static DHCPv6 leases. */ |
238 | if ((lease != NULL) && (lease->flags & STATIC_LEASE)) { | |
239 | if (!(oc = lookup_option(&server_universe, options, | |
240 | SV_UPDATE_STATIC_LEASES)) || | |
241 | !evaluate_boolean_option_cache(&ignorep, packet, lease, | |
242 | NULL, packet->options, | |
243 | options, scope, oc, MDL)) | |
98bf1607 | 244 | goto out; |
ec64b462 TL |
245 | } |
246 | ||
b992d7e2 | 247 | /* |
478028e7 | 248 | * Compute the name for the A record. |
b992d7e2 | 249 | */ |
98bd7ca0 | 250 | oc = lookup_option(&server_universe, options, SV_DDNS_HOST_NAME); |
b992d7e2 | 251 | if (oc) |
98bd7ca0 DH |
252 | s1 = evaluate_option_cache(&ddns_hostname, packet, lease, |
253 | NULL, packet->options, | |
254 | options, scope, oc, MDL); | |
98311e4b DH |
255 | else |
256 | s1 = 0; | |
b992d7e2 | 257 | |
d9b2a590 TM |
258 | /* If we don't have a host name based on ddns-hostname then use |
259 | * the host declaration name if there is one and use-host-decl-names | |
260 | * is turned on. */ | |
261 | if ((s1 == 0) && (lease && lease->host && lease->host->name)) { | |
262 | oc = lookup_option(&server_universe, options, | |
263 | SV_USE_HOST_DECL_NAMES); | |
264 | if (evaluate_boolean_option_cache(NULL, packet, lease, | |
265 | NULL, packet->options, | |
266 | options, scope, oc, MDL)) { | |
267 | s1 = ((data_string_new(&ddns_hostname, | |
268 | lease->host->name, | |
269 | strlen(lease->host->name), | |
270 | MDL) && ddns_hostname.len > 0)); | |
271 | } | |
272 | } | |
273 | ||
98bd7ca0 | 274 | oc = lookup_option(&server_universe, options, SV_DDNS_DOMAIN_NAME); |
b992d7e2 | 275 | if (oc) |
98bd7ca0 DH |
276 | s2 = evaluate_option_cache(&ddns_domainname, packet, lease, |
277 | NULL, packet->options, | |
278 | options, scope, oc, MDL); | |
98311e4b DH |
279 | else |
280 | s2 = 0; | |
b992d7e2 DN |
281 | |
282 | if (s1 && s2) { | |
98311e4b DH |
283 | if (ddns_hostname.len + ddns_domainname.len > 253) { |
284 | log_error ("ddns_update: host.domain name too long"); | |
285 | ||
286 | goto out; | |
287 | } | |
288 | ||
a07d99bb TM |
289 | if (buffer_allocate (&ddns_fwd_name.buffer, |
290 | ddns_hostname.len + | |
291 | ddns_domainname.len + 2, MDL)) { | |
98bf1607 | 292 | ddns_fwd_name.data = ddns_fwd_name.buffer->data; |
b992d7e2 | 293 | data_string_append (&ddns_fwd_name, &ddns_hostname); |
98bf1607 | 294 | ddns_fwd_name.buffer->data[ddns_fwd_name.len] = '.'; |
b992d7e2 DN |
295 | ddns_fwd_name.len++; |
296 | data_string_append (&ddns_fwd_name, &ddns_domainname); | |
98bf1607 | 297 | ddns_fwd_name.buffer->data[ddns_fwd_name.len] ='\0'; |
b992d7e2 DN |
298 | ddns_fwd_name.terminated = 1; |
299 | } | |
300 | } | |
478028e7 TL |
301 | client_updates: |
302 | ||
303 | /* See if there's a name already stored on the lease. */ | |
98bd7ca0 | 304 | if (find_bound_string(&old_ddns_fwd_name, *scope, "ddns-fwd-name")) { |
478028e7 TL |
305 | /* If there is, see if it's different. */ |
306 | if (old_ddns_fwd_name.len != ddns_fwd_name.len || | |
307 | memcmp (old_ddns_fwd_name.data, ddns_fwd_name.data, | |
308 | old_ddns_fwd_name.len)) { | |
98bf1607 SR |
309 | /* |
310 | * If the name is different, mark the old record | |
311 | * for deletion and continue getting the new info. | |
312 | */ | |
313 | do_remove = 1; | |
478028e7 TL |
314 | goto in; |
315 | } | |
316 | ||
d7d9c0c7 SR |
317 | #if defined (DDNS_UPDATE_SLOW_TRANSITION) |
318 | /* | |
319 | * If the slow transition code is enabled check to see | |
320 | * if the stored type (standard or interim doesn't | |
321 | * match the type currently in use. If it doesn't | |
322 | * try to remove and replace the DNS record | |
98bd7ca0 | 323 | */ |
d7d9c0c7 SR |
324 | if (((ddns_update_style == DDNS_UPDATE_STYLE_STANDARD) && |
325 | find_bound_string(&ddns_dhcid, *scope, ddns_interim_tag)) || | |
326 | ((ddns_update_style == DDNS_UPDATE_STYLE_INTERIM) && | |
327 | find_bound_string(&ddns_dhcid, *scope, ddns_standard_tag))) { | |
75ab3070 | 328 | data_string_forget(&ddns_dhcid, MDL); |
d7d9c0c7 SR |
329 | do_remove = 1; |
330 | goto in; | |
331 | } | |
332 | #endif | |
905c58b9 | 333 | |
ebd0310b TL |
334 | /* See if the administrator wants to do updates even |
335 | in cases where the update already appears to have been | |
336 | done. */ | |
98bd7ca0 DH |
337 | if (!(oc = lookup_option(&server_universe, options, |
338 | SV_UPDATE_OPTIMIZATION)) || | |
339 | evaluate_boolean_option_cache(&ignorep, packet, lease, | |
340 | NULL, packet->options, | |
341 | options, scope, oc, MDL)) { | |
ebd0310b TL |
342 | result = 1; |
343 | goto noerror; | |
344 | } | |
75ab3070 DH |
345 | /* If there's no "ddns-fwd-name" on the lease record, see if |
346 | * there's a ddns-client-fqdn indicating a previous client | |
347 | * update (if it changes, we need to adjust the PTR). | |
348 | */ | |
98bd7ca0 | 349 | } else if (find_bound_string(&old_ddns_fwd_name, *scope, |
75ab3070 | 350 | "ddns-client-fqdn")) { |
98311e4b DH |
351 | /* If the name is not different, no need to update |
352 | the PTR record. */ | |
ee83afae TL |
353 | if (old_ddns_fwd_name.len == ddns_fwd_name.len && |
354 | !memcmp (old_ddns_fwd_name.data, ddns_fwd_name.data, | |
98311e4b | 355 | old_ddns_fwd_name.len) && |
98bd7ca0 DH |
356 | (!(oc = lookup_option(&server_universe, options, |
357 | SV_UPDATE_OPTIMIZATION)) || | |
358 | evaluate_boolean_option_cache(&ignorep, packet, lease, | |
359 | NULL, packet->options, | |
360 | options, scope, oc, MDL))) { | |
478028e7 TL |
361 | goto noerror; |
362 | } | |
363 | } | |
364 | in: | |
905c58b9 | 365 | |
d758ad8c TL |
366 | /* If we don't have a name that the client has been assigned, we |
367 | can just skip all this. */ | |
d758ad8c | 368 | |
98bf1607 SR |
369 | if ((!ddns_fwd_name.len) || (ddns_fwd_name.len > 255)) { |
370 | if (ddns_fwd_name.len > 255) { | |
371 | log_error ("client provided fqdn: too long"); | |
372 | } | |
373 | ||
374 | /* If desired do the removals */ | |
375 | if (do_remove != 0) { | |
0ef9a46e | 376 | (void) ddns_removals(lease, lease6, NULL, ISC_TRUE); |
98bf1607 | 377 | } |
98311e4b DH |
378 | goto out; |
379 | } | |
380 | ||
b992d7e2 | 381 | /* |
478028e7 | 382 | * Compute the RR TTL. |
2b58b865 SR |
383 | * |
384 | * We have two ways of computing the TTL. | |
385 | * The old behavior was to allow for the customer to set up | |
386 | * the option or to default things. For v4 this was 1/2 | |
387 | * of the lease time, for v6 this was DEFAULT_DDNS_TTL. | |
388 | * The new behavior continues to allow the customer to set | |
389 | * up an option but the defaults are a little different. | |
390 | * We now use 1/2 of the (preferred) lease time for both | |
905c58b9 | 391 | * v4 and v6 and cap them at a maximum value. |
2b58b865 SR |
392 | * If the customer chooses to use an experession that references |
393 | * part of the lease the v6 value will be the default as there | |
394 | * isn't a lease available for v6. | |
478028e7 | 395 | */ |
2b58b865 | 396 | |
478028e7 | 397 | ddns_ttl = DEFAULT_DDNS_TTL; |
2b58b865 SR |
398 | if (lease != NULL) { |
399 | if (lease->ends <= cur_time) { | |
400 | ddns_ttl = 0; | |
401 | } else { | |
402 | ddns_ttl = (lease->ends - cur_time)/2; | |
403 | } | |
404 | } | |
405 | #ifndef USE_OLD_DDNS_TTL | |
406 | else if (lease6 != NULL) { | |
407 | ddns_ttl = lease6->prefer/2; | |
408 | } | |
409 | ||
410 | if (ddns_ttl > MAX_DEFAULT_DDNS_TTL) { | |
411 | ddns_ttl = MAX_DEFAULT_DDNS_TTL; | |
412 | } | |
905c58b9 | 413 | #endif |
2b58b865 | 414 | |
98bd7ca0 DH |
415 | if ((oc = lookup_option(&server_universe, options, SV_DDNS_TTL))) { |
416 | if (evaluate_option_cache(&d1, packet, lease, NULL, | |
2b58b865 SR |
417 | packet->options, options, |
418 | scope, oc, MDL)) { | |
478028e7 | 419 | if (d1.len == sizeof (u_int32_t)) |
2b58b865 | 420 | ddns_ttl = getULong (d1.data); |
478028e7 TL |
421 | data_string_forget (&d1, MDL); |
422 | } | |
423 | } | |
424 | ||
2b58b865 SR |
425 | ddns_cb->ttl = ddns_ttl; |
426 | ||
478028e7 | 427 | /* |
61d75ea2 | 428 | * Compute the reverse IP name, starting with the domain name. |
b992d7e2 | 429 | */ |
61d75ea2 DH |
430 | oc = lookup_option(&server_universe, options, SV_DDNS_REV_DOMAIN_NAME); |
431 | if (oc) | |
432 | s1 = evaluate_option_cache(&d1, packet, lease, NULL, | |
433 | packet->options, options, | |
434 | scope, oc, MDL); | |
435 | else | |
436 | s1 = 0; | |
98bd7ca0 | 437 | |
905c58b9 TM |
438 | /* |
439 | * Figure out the length of the part of the name that depends | |
98bd7ca0 DH |
440 | * on the address. |
441 | */ | |
98bf1607 | 442 | if (ddns_cb->address.len == 4) { |
61d75ea2 | 443 | char buf[17]; |
98bd7ca0 DH |
444 | /* XXX: WOW this is gross. */ |
445 | rev_name_len = snprintf(buf, sizeof(buf), "%u.%u.%u.%u.", | |
98bf1607 SR |
446 | ddns_cb->address.iabuf[3] & 0xff, |
447 | ddns_cb->address.iabuf[2] & 0xff, | |
448 | ddns_cb->address.iabuf[1] & 0xff, | |
449 | ddns_cb->address.iabuf[0] & 0xff) + 1; | |
61d75ea2 DH |
450 | |
451 | if (s1) { | |
452 | rev_name_len += d1.len; | |
453 | ||
454 | if (rev_name_len > 255) { | |
455 | log_error("ddns_update: Calculated rev domain " | |
456 | "name too long."); | |
457 | s1 = 0; | |
458 | data_string_forget(&d1, MDL); | |
459 | } | |
460 | } | |
98bf1607 | 461 | } else if (ddns_cb->address.len == 16) { |
905c58b9 TM |
462 | /* |
463 | * IPv6 reverse names are always the same length, with | |
98bd7ca0 DH |
464 | * 32 hex characters separated by dots. |
465 | */ | |
61d75ea2 DH |
466 | rev_name_len = sizeof("0.1.2.3.4.5.6.7." |
467 | "8.9.a.b.c.d.e.f." | |
468 | "0.1.2.3.4.5.6.7." | |
469 | "8.9.a.b.c.d.e.f." | |
470 | "ip6.arpa."); | |
471 | ||
472 | /* Set s1 to make sure we gate into updates. */ | |
473 | s1 = 1; | |
6705543f | 474 | } else { |
98bf1607 | 475 | log_fatal("invalid address length %d", ddns_cb->address.len); |
6705543f DH |
476 | /* Silence compiler warnings. */ |
477 | return 0; | |
478 | } | |
98bd7ca0 | 479 | |
61d75ea2 DH |
480 | /* See if we are configured NOT to do reverse ptr updates */ |
481 | if ((oc = lookup_option(&server_universe, options, | |
482 | SV_DO_REVERSE_UPDATES)) && | |
483 | !evaluate_boolean_option_cache(&ignorep, packet, lease, NULL, | |
98bd7ca0 | 484 | packet->options, options, |
61d75ea2 | 485 | scope, oc, MDL)) { |
98bf1607 | 486 | ddns_cb->flags &= ~DDNS_UPDATE_PTR; |
98311e4b DH |
487 | } |
488 | ||
61d75ea2 | 489 | if (s1) { |
a07d99bb TM |
490 | if (buffer_allocate(&ddns_cb->rev_name.buffer, |
491 | rev_name_len, MDL)) { | |
98bf1607 SR |
492 | struct data_string *rname = &ddns_cb->rev_name; |
493 | rname->data = rname->buffer->data; | |
494 | ||
495 | if (ddns_cb->address.len == 4) { | |
496 | rname->len = | |
497 | sprintf((char *)rname->buffer->data, | |
905c58b9 | 498 | "%u.%u.%u.%u.", |
98bf1607 SR |
499 | ddns_cb->address.iabuf[3] & 0xff, |
500 | ddns_cb->address.iabuf[2] & 0xff, | |
501 | ddns_cb->address.iabuf[1] & 0xff, | |
502 | ddns_cb->address.iabuf[0] & 0xff); | |
61d75ea2 DH |
503 | |
504 | /* | |
505 | * d1.data may be opaque, garbage bytes, from | |
506 | * user (mis)configuration. | |
507 | */ | |
98bf1607 SR |
508 | data_string_append(rname, &d1); |
509 | rname->buffer->data[rname->len] = '\0'; | |
510 | } else if (ddns_cb->address.len == 16) { | |
511 | char *p = (char *)&rname->buffer->data; | |
512 | unsigned char *a = ddns_cb->address.iabuf + 15; | |
98bd7ca0 | 513 | for (i=0; i<16; i++) { |
905c58b9 | 514 | sprintf(p, "%x.%x.", |
98bd7ca0 DH |
515 | (*a & 0xF), ((*a >> 4) & 0xF)); |
516 | p += 4; | |
517 | a -= 1; | |
518 | } | |
61d75ea2 | 519 | strcat(p, "ip6.arpa."); |
98bf1607 | 520 | rname->len = strlen((const char *)rname->data); |
98bd7ca0 | 521 | } |
98311e4b | 522 | |
98bf1607 | 523 | rname->terminated = 1; |
b992d7e2 | 524 | } |
98bd7ca0 | 525 | |
61d75ea2 DH |
526 | if (d1.data != NULL) |
527 | data_string_forget(&d1, MDL); | |
b992d7e2 DN |
528 | } |
529 | ||
d7d9c0c7 SR |
530 | /* |
531 | * copy the string now so we can pass it to the dhcid routines | |
532 | * via the ddns_cb pointer | |
533 | */ | |
534 | data_string_copy(&ddns_cb->fwd_name, &ddns_fwd_name, MDL); | |
535 | ||
b992d7e2 | 536 | /* |
478028e7 | 537 | * If we are updating the A record, compute the DHCID value. |
d7d9c0c7 SR |
538 | * We have two options for computing the DHCID value, the older |
539 | * interim version and the newer standard version. The interim | |
540 | * has some issues but is left as is to avoid compatibility issues. | |
541 | * | |
542 | * We select the type of DHCID to construct and the information to | |
543 | * use for the digest based on 4701 section 3.3 | |
b992d7e2 | 544 | */ |
98bf1607 | 545 | if ((ddns_cb->flags & DDNS_UPDATE_ADDR) != 0) { |
d7d9c0c7 SR |
546 | int ddns_type; |
547 | int ddns_len; | |
548 | if (ddns_update_style == DDNS_UPDATE_STYLE_STANDARD) { | |
549 | /* The standard style */ | |
550 | ddns_cb->lease_tag = ddns_standard_tag; | |
551 | ddns_cb->dhcid_class = dns_rdatatype_dhcid; | |
905c58b9 | 552 | ddns_cb->other_dhcid_class = dns_rdatatype_txt; |
d7d9c0c7 SR |
553 | ddns_type = 1; |
554 | ddns_len = 4; | |
555 | } else { | |
556 | /* The older interim style */ | |
557 | ddns_cb->lease_tag = ddns_interim_tag; | |
558 | ddns_cb->dhcid_class = dns_rdatatype_txt; | |
905c58b9 | 559 | ddns_cb->other_dhcid_class = dns_rdatatype_dhcid; |
d7d9c0c7 SR |
560 | /* for backwards compatibility */ |
561 | ddns_type = DHO_DHCP_CLIENT_IDENTIFIER; | |
562 | /* IAID incorrectly included */ | |
563 | ddns_len = 0; | |
564 | } | |
565 | ||
566 | ||
567 | if (lease6 != NULL) { | |
568 | if (lease6->ia->iaid_duid.len < ddns_len) | |
569 | goto badfqdn; | |
570 | result = get_dhcid(ddns_cb, 2, | |
571 | lease6->ia->iaid_duid.data + ddns_len, | |
572 | lease6->ia->iaid_duid.len - ddns_len); | |
573 | } else if ((lease != NULL) && | |
574 | (lease->uid != NULL) && | |
575 | (lease->uid_len != 0)) { | |
576 | /* If this is standard check for an RFC 4361 | |
577 | * compliant client identifier | |
578 | */ | |
579 | if ((ddns_update_style == DDNS_UPDATE_STYLE_STANDARD) && | |
580 | (lease->uid[0] == 255)) { | |
581 | if (lease->uid_len < 5) | |
582 | goto badfqdn; | |
583 | result = get_dhcid(ddns_cb, 2, | |
584 | lease->uid + 5, | |
585 | lease->uid_len - 5); | |
586 | } else { | |
587 | result = get_dhcid(ddns_cb, ddns_type, | |
588 | lease->uid, | |
589 | lease->uid_len); | |
590 | } | |
591 | } else if (lease != NULL) | |
592 | result = get_dhcid(ddns_cb, 0, | |
593 | lease->hardware_addr.hbuf, | |
594 | lease->hardware_addr.hlen); | |
98bd7ca0 DH |
595 | else |
596 | log_fatal("Impossible condition at %s:%d.", MDL); | |
597 | ||
d758ad8c TL |
598 | if (!result) |
599 | goto badfqdn; | |
478028e7 | 600 | } |
b992d7e2 | 601 | |
b992d7e2 DN |
602 | /* |
603 | * Perform updates. | |
604 | */ | |
3004bebf | 605 | |
b45889b4 | 606 | if (ddns_cb->flags & DDNS_UPDATE_ADDR) { |
905c58b9 | 607 | copy_conflict_flags(&ddns_cb->flags, ddns_conflict_mask); |
3004bebf | 608 | } |
75ab3070 | 609 | |
98bf1607 SR |
610 | /* |
611 | * Previously if we failed during the removal operations | |
612 | * we skipped the fqdn option processing. I'm not sure | |
613 | * if we want to continue with that if we fail before sending | |
614 | * the ddns messages. Currently we don't. | |
615 | */ | |
616 | if (do_remove) { | |
dd9237c3 TM |
617 | /* |
618 | * We should log a more specific error closer to the actual | |
619 | * error if we want one. ddns_removal failure not logged here. | |
620 | */ | |
621 | (void) ddns_removals(lease, lease6, ddns_cb, ISC_TRUE); | |
b992d7e2 | 622 | } |
98bf1607 SR |
623 | else { |
624 | ddns_fwd_srv_connector(lease, lease6, scope, ddns_cb, | |
625 | ISC_R_SUCCESS); | |
b992d7e2 | 626 | } |
98bf1607 | 627 | ddns_cb = NULL; |
b992d7e2 | 628 | |
478028e7 | 629 | noerror: |
1ba87b37 EH |
630 | /* |
631 | * If fqdn-reply option is disabled in dhcpd.conf, then don't | |
632 | * send the client an FQDN option at all, even if one was requested. | |
633 | * (WinXP clients allegedly misbehave if the option is present, | |
634 | * refusing to handle PTR updates themselves). | |
635 | */ | |
98bd7ca0 DH |
636 | if ((oc = lookup_option (&server_universe, options, SV_FQDN_REPLY)) && |
637 | !evaluate_boolean_option_cache(&ignorep, packet, lease, NULL, | |
638 | packet->options, options, | |
639 | scope, oc, MDL)) { | |
1ba87b37 EH |
640 | goto badfqdn; |
641 | ||
a396d25f DH |
642 | /* If we're ignoring client updates, then we tell a sort of 'white |
643 | * lie'. We've already updated the name the server wants (per the | |
644 | * config written by the server admin). Now let the client do as | |
645 | * it pleases with the name they supplied (if any). | |
646 | * | |
647 | * We only form an FQDN option this way if the client supplied an | |
648 | * FQDN option that had FQDN_SERVER_UPDATE set false. | |
649 | */ | |
1ba87b37 | 650 | } else if (client_ignorep && |
a396d25f DH |
651 | (oc = lookup_option(&fqdn_universe, packet->options, |
652 | FQDN_SERVER_UPDATE)) && | |
653 | !evaluate_boolean_option_cache(&ignorep, packet, lease, NULL, | |
98bd7ca0 DH |
654 | packet->options, options, |
655 | scope, oc, MDL)) { | |
a396d25f DH |
656 | oc = lookup_option(&fqdn_universe, packet->options, FQDN_FQDN); |
657 | if (oc && evaluate_option_cache(&d1, packet, lease, NULL, | |
98bd7ca0 DH |
658 | packet->options, options, |
659 | scope, oc, MDL)) { | |
a396d25f DH |
660 | if (d1.len == 0 || |
661 | !buffer_allocate(&bp, d1.len + 5, MDL)) | |
662 | goto badfqdn; | |
663 | ||
664 | /* Server pretends it is not updating. */ | |
665 | bp->data[0] = 0; | |
98bd7ca0 | 666 | if (!save_option_buffer(&fqdn_universe, options, |
a396d25f | 667 | bp, &bp->data[0], 1, |
8f4c32a1 | 668 | FQDN_SERVER_UPDATE, 0)) |
a396d25f DH |
669 | goto badfqdn; |
670 | ||
671 | /* Client is encouraged to update. */ | |
672 | bp->data[1] = 0; | |
98bd7ca0 | 673 | if (!save_option_buffer(&fqdn_universe, options, |
a396d25f | 674 | bp, &bp->data[1], 1, |
8f4c32a1 | 675 | FQDN_NO_CLIENT_UPDATE, 0)) |
a396d25f DH |
676 | goto badfqdn; |
677 | ||
678 | /* Use the encoding of client's FQDN option. */ | |
679 | oc = lookup_option(&fqdn_universe, packet->options, | |
680 | FQDN_ENCODED); | |
98bd7ca0 DH |
681 | if (oc && |
682 | evaluate_boolean_option_cache(&ignorep, packet, | |
683 | lease, NULL, | |
684 | packet->options, | |
685 | options, scope, | |
686 | oc, MDL)) | |
a396d25f DH |
687 | bp->data[2] = 1; /* FQDN is encoded. */ |
688 | else | |
689 | bp->data[2] = 0; /* FQDN is not encoded. */ | |
690 | ||
98bd7ca0 | 691 | if (!save_option_buffer(&fqdn_universe, options, |
a396d25f | 692 | bp, &bp->data[2], 1, |
8f4c32a1 | 693 | FQDN_ENCODED, 0)) |
a396d25f DH |
694 | goto badfqdn; |
695 | ||
696 | /* Current FQDN drafts indicate 255 is mandatory. */ | |
697 | bp->data[3] = 255; | |
98bd7ca0 | 698 | if (!save_option_buffer(&fqdn_universe, options, |
a396d25f | 699 | bp, &bp->data[3], 1, |
8f4c32a1 | 700 | FQDN_RCODE1, 0)) |
a396d25f DH |
701 | goto badfqdn; |
702 | ||
703 | bp->data[4] = 255; | |
98bd7ca0 | 704 | if (!save_option_buffer(&fqdn_universe, options, |
a396d25f | 705 | bp, &bp->data[4], 1, |
8f4c32a1 | 706 | FQDN_RCODE2, 0)) |
a396d25f DH |
707 | goto badfqdn; |
708 | ||
709 | /* Copy in the FQDN supplied by the client. Note well | |
710 | * that the format of this option in the cache is going | |
711 | * to be in text format. If the fqdn supplied by the | |
712 | * client is encoded, it is decoded into the option | |
713 | * cache when parsed out of the packet. It will be | |
714 | * re-encoded when the option is assembled to be | |
715 | * transmitted if the client elects that encoding. | |
716 | */ | |
717 | memcpy(&bp->data[5], d1.data, d1.len); | |
98bd7ca0 | 718 | if (!save_option_buffer(&fqdn_universe, options, |
928618dd | 719 | bp, &bp->data[5], d1.len, |
8f4c32a1 | 720 | FQDN_FQDN, 0)) |
a396d25f DH |
721 | goto badfqdn; |
722 | ||
723 | data_string_forget(&d1, MDL); | |
724 | } | |
725 | /* Set up the outgoing FQDN option if there was an incoming | |
726 | * FQDN option. If there's a valid FQDN option, there MUST | |
727 | * be an FQDN_SERVER_UPDATES suboption, it's part of the fixed | |
728 | * length head of the option contents, so we test the latter | |
729 | * to detect the presence of the former. | |
730 | */ | |
731 | } else if ((oc = lookup_option(&fqdn_universe, packet->options, | |
732 | FQDN_ENCODED)) && | |
733 | buffer_allocate(&bp, ddns_fwd_name.len + 5, MDL)) { | |
478028e7 | 734 | bp -> data [0] = server_updates_a; |
98bd7ca0 DH |
735 | if (!save_option_buffer(&fqdn_universe, options, |
736 | bp, &bp->data [0], 1, | |
737 | FQDN_SERVER_UPDATE, 0)) | |
478028e7 TL |
738 | goto badfqdn; |
739 | bp -> data [1] = server_updates_a; | |
98bd7ca0 DH |
740 | if (!save_option_buffer(&fqdn_universe, options, |
741 | bp, &bp->data [1], 1, | |
f7fdb216 | 742 | FQDN_NO_CLIENT_UPDATE, 0)) |
478028e7 | 743 | goto badfqdn; |
a396d25f | 744 | |
478028e7 | 745 | /* Do the same encoding the client did. */ |
a396d25f DH |
746 | if (evaluate_boolean_option_cache(&ignorep, packet, lease, |
747 | NULL, packet->options, | |
98bd7ca0 | 748 | options, scope, oc, MDL)) |
478028e7 TL |
749 | bp -> data [2] = 1; |
750 | else | |
751 | bp -> data [2] = 0; | |
98bd7ca0 DH |
752 | if (!save_option_buffer(&fqdn_universe, options, |
753 | bp, &bp->data [2], 1, | |
754 | FQDN_ENCODED, 0)) | |
478028e7 | 755 | goto badfqdn; |
98bf1607 | 756 | bp -> data [3] = 255;//isc_rcode_to_ns (rcode1); |
98bd7ca0 DH |
757 | if (!save_option_buffer(&fqdn_universe, options, |
758 | bp, &bp->data [3], 1, | |
759 | FQDN_RCODE1, 0)) | |
478028e7 | 760 | goto badfqdn; |
98bf1607 | 761 | bp -> data [4] = 255;//isc_rcode_to_ns (rcode2); |
98bd7ca0 DH |
762 | if (!save_option_buffer(&fqdn_universe, options, |
763 | bp, &bp->data [4], 1, | |
764 | FQDN_RCODE2, 0)) | |
478028e7 TL |
765 | goto badfqdn; |
766 | if (ddns_fwd_name.len) { | |
767 | memcpy (&bp -> data [5], | |
768 | ddns_fwd_name.data, ddns_fwd_name.len); | |
98bd7ca0 DH |
769 | if (!save_option_buffer(&fqdn_universe, options, |
770 | bp, &bp->data [5], | |
478028e7 | 771 | ddns_fwd_name.len, |
f7fdb216 | 772 | FQDN_FQDN, 0)) |
478028e7 TL |
773 | goto badfqdn; |
774 | } | |
b992d7e2 DN |
775 | } |
776 | ||
478028e7 TL |
777 | badfqdn: |
778 | out: | |
b992d7e2 DN |
779 | /* |
780 | * Final cleanup. | |
781 | */ | |
98bf1607 | 782 | if (ddns_cb != NULL) { |
f1208e79 | 783 | destroy_ddns_cb(ddns_cb, MDL); |
98bf1607 SR |
784 | } |
785 | ||
a396d25f DH |
786 | data_string_forget(&d1, MDL); |
787 | data_string_forget(&ddns_hostname, MDL); | |
788 | data_string_forget(&ddns_domainname, MDL); | |
789 | data_string_forget(&old_ddns_fwd_name, MDL); | |
790 | data_string_forget(&ddns_fwd_name, MDL); | |
c3993513 | 791 | if (bp) |
a396d25f | 792 | buffer_dereference(&bp, MDL); |
b992d7e2 | 793 | |
478028e7 | 794 | return result; |
b992d7e2 DN |
795 | } |
796 | ||
d13db163 | 797 | /*%< |
98bf1607 SR |
798 | * Utility function to update text strings within a lease. |
799 | * | |
800 | * The first issue is to find the proper scope. Sometimes we shall be | |
801 | * called with a pointer to the scope in other cases we need to find | |
802 | * the proper lease and then get the scope. Once we have the scope we update | |
803 | * the proper strings, as indicated by the state value in the control block. | |
804 | * Lastly, if we needed to find the scope we write it out, if we used a | |
805 | * scope that was passed as an argument we don't write it, assuming that | |
806 | * our caller (or his ...) will do the write. | |
905c58b9 | 807 | * |
d13db163 SR |
808 | *\li ddns_cb - the control block for the DDNS request |
809 | * | |
810 | *\li inscope - a pointer to the scope to update. This may be NULL | |
811 | * in which case we use the control block to find the lease and | |
812 | * then the scope. | |
813 | * | |
814 | * Returns | |
815 | *\li ISC_R_SUCCESS | |
816 | * | |
817 | *\li ISC_R_FAILURE - The routine was unable to find an expected scope. | |
818 | * In some cases (static and inactive leases) we don't expect a scope | |
819 | * and return success. | |
98bf1607 SR |
820 | */ |
821 | ||
822 | isc_result_t | |
823 | ddns_update_lease_text(dhcp_ddns_cb_t *ddns_cb, | |
824 | struct binding_scope **inscope) | |
825 | { | |
826 | struct binding_scope **scope = NULL; | |
827 | struct lease *lease = NULL; | |
828 | struct iasubopt *lease6 = NULL; | |
829 | struct ipv6_pool *pool = NULL; | |
830 | struct in6_addr addr; | |
831 | struct data_string lease_dhcid; | |
905c58b9 | 832 | |
3221151b SR |
833 | /* |
834 | * If the lease was static (for a fixed address) | |
835 | * we don't need to do any work. | |
836 | */ | |
837 | if (ddns_cb->flags & DDNS_STATIC_LEASE) | |
838 | return (ISC_R_SUCCESS); | |
839 | ||
905c58b9 | 840 | /* |
0ef9a46e | 841 | * If we are processing an expired or released v6 lease |
d13db163 SR |
842 | * or some types of v4 leases we don't actually have a |
843 | * scope to update | |
0ef9a46e | 844 | */ |
d13db163 | 845 | if ((ddns_cb->flags & DDNS_ACTIVE_LEASE) == 0) |
0ef9a46e | 846 | return (ISC_R_SUCCESS); |
0ef9a46e | 847 | |
98bf1607 SR |
848 | if (inscope != NULL) { |
849 | scope = inscope; | |
850 | } else if (ddns_cb->address.len == 4) { | |
851 | if (find_lease_by_ip_addr(&lease, ddns_cb->address, MDL) != 0){ | |
852 | scope = &(lease->scope); | |
853 | } | |
854 | } else if (ddns_cb->address.len == 16) { | |
855 | memcpy(&addr, &ddns_cb->address.iabuf, 16); | |
856 | if ((find_ipv6_pool(&pool, D6O_IA_TA, &addr) == | |
857 | ISC_R_SUCCESS) || | |
905c58b9 | 858 | (find_ipv6_pool(&pool, D6O_IA_NA, &addr) == |
98bf1607 SR |
859 | ISC_R_SUCCESS)) { |
860 | if (iasubopt_hash_lookup(&lease6, pool->leases, | |
861 | &addr, 16, MDL)) { | |
862 | scope = &(lease6->scope); | |
863 | } | |
864 | ipv6_pool_dereference(&pool, MDL); | |
865 | } | |
866 | } else { | |
867 | log_fatal("Impossible condition at %s:%d.", MDL); | |
868 | } | |
869 | ||
870 | if (scope == NULL) { | |
871 | /* If necessary get rid of the lease */ | |
872 | if (lease) { | |
873 | lease_dereference(&lease, MDL); | |
874 | } | |
875 | else if (lease6) { | |
876 | iasubopt_dereference(&lease6, MDL); | |
877 | } | |
878 | ||
879 | return(ISC_R_FAILURE); | |
880 | } | |
881 | ||
882 | /* We now have a scope and can proceed to update it */ | |
883 | switch(ddns_cb->state) { | |
884 | case DDNS_STATE_REM_PTR: | |
885 | unset(*scope, "ddns-rev-name"); | |
886 | if ((ddns_cb->flags & DDNS_CLIENT_DID_UPDATE) != 0) { | |
887 | unset(*scope, "ddns-client-fqdn"); | |
888 | } | |
889 | break; | |
890 | ||
891 | case DDNS_STATE_ADD_PTR: | |
892 | case DDNS_STATE_CLEANUP: | |
893 | bind_ds_value(scope, "ddns-rev-name", &ddns_cb->rev_name); | |
894 | if ((ddns_cb->flags & DDNS_UPDATE_ADDR) == 0) { | |
895 | bind_ds_value(scope, "ddns-client-fqdn", | |
896 | &ddns_cb->fwd_name); | |
897 | } | |
898 | break; | |
899 | ||
900 | case DDNS_STATE_ADD_FW_YXDHCID: | |
901 | case DDNS_STATE_ADD_FW_NXDOMAIN: | |
905c58b9 | 902 | case DDNS_STATE_DSMM_FW_ADD3: |
98bf1607 SR |
903 | bind_ds_value(scope, "ddns-fwd-name", &ddns_cb->fwd_name); |
904 | ||
d7d9c0c7 | 905 | if (ddns_cb->lease_tag == ddns_standard_tag) { |
905c58b9 TM |
906 | bind_ds_value(scope, ddns_standard_tag, |
907 | &ddns_cb->dhcid); | |
d7d9c0c7 SR |
908 | } else { |
909 | /* convert from dns version to lease version of dhcid */ | |
910 | memset(&lease_dhcid, 0, sizeof(lease_dhcid)); | |
911 | dhcid_tolease(&ddns_cb->dhcid, &lease_dhcid); | |
912 | bind_ds_value(scope, ddns_interim_tag, &lease_dhcid); | |
913 | data_string_forget(&lease_dhcid, MDL); | |
914 | } | |
98bf1607 SR |
915 | break; |
916 | ||
917 | case DDNS_STATE_REM_FW_NXRR: | |
918 | case DDNS_STATE_REM_FW_YXDHCID: | |
905c58b9 | 919 | case DDNS_STATE_REM_FW_DSMM_OTHER: |
98bf1607 | 920 | unset(*scope, "ddns-fwd-name"); |
d7d9c0c7 | 921 | unset(*scope, ddns_cb->lease_tag); |
98bf1607 SR |
922 | break; |
923 | } | |
905c58b9 | 924 | |
98bf1607 SR |
925 | /* If necessary write it out and get rid of the lease */ |
926 | if (lease) { | |
927 | write_lease(lease); | |
928 | lease_dereference(&lease, MDL); | |
929 | } else if (lease6) { | |
930 | write_ia(lease6->ia); | |
931 | iasubopt_dereference(&lease6, MDL); | |
932 | } | |
933 | ||
934 | return(ISC_R_SUCCESS); | |
935 | } | |
936 | ||
beaed73f SR |
937 | /* |
938 | * This function should be called when update_lease_ptr function fails. | |
939 | * It does inform user about the condition, provides some hints how to | |
940 | * resolve this and dies gracefully. This can happend in at least three | |
941 | * cases (all are configuration mistakes): | |
942 | * a) IPv4: user have duplicate fixed-address entries (the same | |
943 | * address is defined twice). We may have found wrong lease. | |
905c58b9 | 944 | * b) IPv6: user have overlapping pools (we tried to find |
beaed73f SR |
945 | * a lease in a wrong pool) |
946 | * c) IPv6: user have duplicate fixed-address6 entires (the same | |
947 | * address is defined twice). We may have found wrong lease. | |
948 | * | |
949 | * Comment: while it would be possible to recover from both cases | |
950 | * by forcibly searching for leases in *all* following pools, that would | |
951 | * only hide the real problem - a misconfiguration. Proper solution | |
952 | * is to log the problem, die and let the user fix his config file. | |
953 | */ | |
954 | void | |
955 | update_lease_failed(struct lease *lease, | |
956 | struct iasubopt *lease6, | |
957 | dhcp_ddns_cb_t *ddns_cb, | |
958 | dhcp_ddns_cb_t *ddns_cb_set, | |
959 | const char * file, int line) | |
960 | { | |
961 | char lease_address[MAX_ADDRESS_STRING_LEN + 64]; | |
962 | char reason[128]; /* likely reason */ | |
963 | ||
964 | sprintf(reason, "unknown"); | |
965 | sprintf(lease_address, "unknown"); | |
966 | ||
3221151b | 967 | /* |
905c58b9 | 968 | * let's pretend that everything is ok, so we can continue for |
3221151b SR |
969 | * information gathering purposes |
970 | */ | |
905c58b9 | 971 | |
beaed73f | 972 | if (ddns_cb != NULL) { |
905c58b9 | 973 | strncpy(lease_address, piaddr(ddns_cb->address), |
beaed73f | 974 | MAX_ADDRESS_STRING_LEN); |
905c58b9 | 975 | |
beaed73f SR |
976 | if (ddns_cb->address.len == 4) { |
977 | sprintf(reason, "duplicate IPv4 fixed-address entry"); | |
978 | } else if (ddns_cb->address.len == 16) { | |
979 | sprintf(reason, "duplicate IPv6 fixed-address6 entry " | |
980 | "or overlapping pools"); | |
981 | } else { | |
905c58b9 TM |
982 | /* |
983 | * Should not happen. We have non-IPv4, non-IPv6 | |
beaed73f SR |
984 | * address. Something is very wrong here. |
985 | */ | |
986 | sprintf(reason, "corrupted ddns_cb structure (address " | |
987 | "length is %d)", ddns_cb->address.len); | |
988 | } | |
989 | } | |
905c58b9 | 990 | |
beaed73f SR |
991 | log_error("Failed to properly update internal lease structure with " |
992 | "DDNS"); | |
993 | log_error("control block structures. Tried to update lease for" | |
994 | "%s address, ddns_cb=%p.", lease_address, ddns_cb); | |
995 | ||
996 | log_error("%s", ""); | |
997 | log_error("This condition can occur, if DHCP server configuration is " | |
998 | "inconsistent."); | |
999 | log_error("In particular, please do check that your configuration:"); | |
1000 | log_error("a) does not have overlapping pools (especially containing"); | |
1001 | log_error(" %s address).", lease_address); | |
1002 | log_error("b) there are no duplicate fixed-address or fixed-address6"); | |
1003 | log_error("entries for the %s address.", lease_address); | |
1004 | log_error("%s", ""); | |
1005 | log_error("Possible reason for this failure: %s", reason); | |
1006 | ||
1007 | log_fatal("%s(%d): Failed to update lease database with DDNS info for " | |
1008 | "address %s. Lease database inconsistent. Unable to recover." | |
1009 | " Terminating.", file, line, lease_address); | |
1010 | } | |
1011 | ||
1012 | /* | |
1013 | * utility function to update found lease. It does extra checks | |
1014 | * that we are indeed updating the right lease. It may happen | |
1015 | * that user have duplicate fixed-address entries, so we attempt | |
1016 | * to update wrong lease. See also safe_lease6_update. | |
1017 | */ | |
1018 | ||
1019 | void | |
1020 | safe_lease_update(struct lease *lease, | |
beaed73f SR |
1021 | dhcp_ddns_cb_t *oldcb, |
1022 | dhcp_ddns_cb_t *newcb, | |
1023 | const char *file, int line) | |
1024 | { | |
3221151b SR |
1025 | if (lease == NULL) { |
1026 | /* should never get here */ | |
905c58b9 | 1027 | log_fatal("Impossible condition at %s:%d (called from %s:%d).", |
3221151b SR |
1028 | MDL, file, line); |
1029 | } | |
beaed73f | 1030 | |
3221151b SR |
1031 | if ( (lease->ddns_cb == NULL) && (newcb == NULL) ) { |
1032 | /* | |
1033 | * Trying to clean up pointer that is already null. We | |
1034 | * are most likely trying to update wrong lease here. | |
1035 | */ | |
beaed73f | 1036 | |
905c58b9 | 1037 | /* |
3221151b SR |
1038 | * Previously this error message popped out during |
1039 | * DNS update for fixed leases. As we no longer | |
1040 | * try to update the lease for a fixed (static) lease | |
1041 | * this should not be a problem. | |
1042 | */ | |
1043 | log_error("%s(%d): Invalid lease update. Tried to " | |
1044 | "clear already NULL DDNS control block " | |
1045 | "pointer for lease %s.", | |
1046 | file, line, piaddr(lease->ip_addr) ); | |
beaed73f SR |
1047 | |
1048 | #if defined (DNS_UPDATES_MEMORY_CHECKS) | |
3221151b | 1049 | update_lease_failed(lease, NULL, oldcb, newcb, file, line); |
beaed73f | 1050 | #endif |
905c58b9 TM |
1051 | /* |
1052 | * May not reach this: update_lease_failed calls | |
3221151b | 1053 | * log_fatal. |
905c58b9 | 1054 | */ |
3221151b SR |
1055 | return; |
1056 | } | |
beaed73f | 1057 | |
3221151b | 1058 | if ( (lease->ddns_cb != NULL) && (lease->ddns_cb != oldcb) ) { |
905c58b9 | 1059 | /* |
3221151b | 1060 | * There is existing cb structure, but it differs from |
905c58b9 TM |
1061 | * what we expected to see there. Most likely we are |
1062 | * trying to update wrong lease. | |
3221151b SR |
1063 | */ |
1064 | log_error("%s(%d): Failed to update internal lease " | |
1065 | "structure with DDNS control block. Existing" | |
1066 | " ddns_cb structure does not match " | |
1067 | "expectations.IPv4=%s, old ddns_cb=%p, tried" | |
1068 | "to update to new ddns_cb=%p", file, line, | |
1069 | piaddr(lease->ip_addr), oldcb, newcb); | |
beaed73f SR |
1070 | |
1071 | #if defined (DNS_UPDATES_MEMORY_CHECKS) | |
3221151b | 1072 | update_lease_failed(lease, NULL, oldcb, newcb, file, line); |
beaed73f | 1073 | #endif |
905c58b9 TM |
1074 | /* |
1075 | * May not reach this: update_lease_failed calls | |
3221151b | 1076 | * log_fatal. |
905c58b9 TM |
1077 | */ |
1078 | return; | |
3221151b | 1079 | } |
beaed73f | 1080 | |
3221151b SR |
1081 | /* additional IPv4 specific checks may be added here */ |
1082 | ||
1083 | /* update the lease */ | |
1084 | lease->ddns_cb = newcb; | |
1085 | } | |
1086 | ||
1087 | void | |
1088 | safe_lease6_update(struct iasubopt *lease6, | |
1089 | dhcp_ddns_cb_t *oldcb, | |
1090 | dhcp_ddns_cb_t *newcb, | |
1091 | const char *file, int line) | |
1092 | { | |
1093 | char addrbuf[MAX_ADDRESS_STRING_LEN]; | |
1094 | ||
1095 | if (lease6 == NULL) { | |
1096 | /* should never get here */ | |
905c58b9 | 1097 | log_fatal("Impossible condition at %s:%d (called from %s:%d).", |
3221151b SR |
1098 | MDL, file, line); |
1099 | } | |
1100 | ||
1101 | if ( (lease6->ddns_cb == NULL) && (newcb == NULL) ) { | |
905c58b9 | 1102 | inet_ntop(AF_INET6, &lease6->addr, addrbuf, |
3221151b SR |
1103 | MAX_ADDRESS_STRING_LEN); |
1104 | /* | |
1105 | * Trying to clean up pointer that is already null. We | |
1106 | * are most likely trying to update wrong lease here. | |
1107 | */ | |
1108 | log_error("%s(%d): Failed to update internal lease " | |
1109 | "structure. Tried to clear already NULL " | |
1110 | "DDNS control block pointer for lease %s.", | |
1111 | file, line, addrbuf); | |
beaed73f SR |
1112 | |
1113 | #if defined (DNS_UPDATES_MEMORY_CHECKS) | |
3221151b | 1114 | update_lease_failed(NULL, lease6, oldcb, newcb, file, line); |
beaed73f SR |
1115 | #endif |
1116 | ||
905c58b9 TM |
1117 | /* |
1118 | * May not reach this: update_lease_failed calls | |
3221151b | 1119 | * log_fatal. |
905c58b9 TM |
1120 | */ |
1121 | return; | |
3221151b | 1122 | } |
beaed73f | 1123 | |
3221151b | 1124 | if ( (lease6->ddns_cb != NULL) && (lease6->ddns_cb != oldcb) ) { |
905c58b9 | 1125 | /* |
3221151b | 1126 | * there is existing cb structure, but it differs from |
905c58b9 TM |
1127 | * what we expected to see there. Most likely we are |
1128 | * trying to update wrong lease. | |
3221151b | 1129 | */ |
905c58b9 | 1130 | inet_ntop(AF_INET6, &lease6->addr, addrbuf, |
3221151b | 1131 | MAX_ADDRESS_STRING_LEN); |
beaed73f | 1132 | |
3221151b SR |
1133 | log_error("%s(%d): Failed to update internal lease " |
1134 | "structure with DDNS control block. Existing" | |
1135 | " ddns_cb structure does not match " | |
1136 | "expectations.IPv6=%s, old ddns_cb=%p, tried" | |
1137 | "to update to new ddns_cb=%p", file, line, | |
1138 | addrbuf, oldcb, newcb); | |
beaed73f SR |
1139 | |
1140 | #if defined (DNS_UPDATES_MEMORY_CHECKS) | |
3221151b | 1141 | update_lease_failed(NULL, lease6, oldcb, newcb, file, line); |
beaed73f | 1142 | #endif |
905c58b9 TM |
1143 | /* |
1144 | * May not reach this: update_lease_failed calls | |
3221151b | 1145 | * log_fatal. |
905c58b9 | 1146 | */ |
3221151b | 1147 | return; |
beaed73f | 1148 | } |
3221151b | 1149 | /* additional IPv6 specific checks may be added here */ |
905c58b9 | 1150 | |
3221151b SR |
1151 | /* update the lease */ |
1152 | lease6->ddns_cb = newcb; | |
beaed73f SR |
1153 | } |
1154 | ||
98bf1607 SR |
1155 | /* |
1156 | * Utility function to update the pointer to the DDNS control block | |
1157 | * in a lease. | |
1158 | * SUCCESS - able to update the pointer | |
1159 | * FAILURE - lease didn't exist or sanity checks failed | |
1160 | * lease and lease6 may be empty in which case we attempt to find | |
1161 | * the lease from the ddns_cb information. | |
1162 | * ddns_cb is the control block to use if a lookup is necessary | |
1163 | * ddns_cb_set is the pointer to insert into the lease and may be NULL | |
1164 | * The last two arguments may look odd as they will be the same much of the | |
1165 | * time, but I need an argument to tell me if I'm setting or clearing in | |
1166 | * addition to the address information from the cb to look up the lease. | |
1167 | * using the same value twice allows me more flexibility. | |
1168 | */ | |
1169 | ||
905c58b9 | 1170 | isc_result_t |
98bf1607 SR |
1171 | ddns_update_lease_ptr(struct lease *lease, |
1172 | struct iasubopt *lease6, | |
1173 | dhcp_ddns_cb_t *ddns_cb, | |
beaed73f SR |
1174 | dhcp_ddns_cb_t *ddns_cb_set, |
1175 | const char * file, int line) | |
98bf1607 | 1176 | { |
beaed73f | 1177 | char ddns_address[MAX_ADDRESS_STRING_LEN]; |
3221151b | 1178 | sprintf(ddns_address, "unknown"); |
0f750c4f SR |
1179 | if (ddns_cb == NULL) { |
1180 | log_info("%s(%d): No control block for lease update", | |
1181 | file, line); | |
1182 | return (ISC_R_FAILURE); | |
1183 | } | |
1184 | else { | |
36e2c224 | 1185 | strcpy(ddns_address, piaddr(ddns_cb->address)); |
beaed73f SR |
1186 | } |
1187 | #if defined (DEBUG_DNS_UPDATES) | |
1188 | log_info("%s(%d): Updating lease_ptr for ddns_cp=%p (addr=%s)", | |
1189 | file, line, ddns_cb, ddns_address ); | |
1190 | #endif | |
1191 | ||
3221151b SR |
1192 | /* |
1193 | * If the lease was static (for a fixed address) | |
1194 | * we don't need to do any work. | |
1195 | */ | |
1196 | if (ddns_cb->flags & DDNS_STATIC_LEASE) { | |
1197 | #if defined (DEBUG_DNS_UPDATES) | |
1198 | log_info("lease is static, returning"); | |
1199 | #endif | |
1200 | return (ISC_R_SUCCESS); | |
1201 | } | |
1202 | ||
905c58b9 | 1203 | /* |
0ef9a46e | 1204 | * If we are processing an expired or released v6 lease |
d13db163 | 1205 | * we don't actually have a lease to update |
0ef9a46e SR |
1206 | */ |
1207 | if ((ddns_cb->address.len == 16) && | |
1208 | ((ddns_cb->flags & DDNS_ACTIVE_LEASE) == 0)) { | |
1209 | return (ISC_R_SUCCESS); | |
1210 | } | |
1211 | ||
98bf1607 | 1212 | if (lease != NULL) { |
905c58b9 | 1213 | safe_lease_update(lease, ddns_cb, ddns_cb_set, |
beaed73f | 1214 | file, line); |
98bf1607 | 1215 | } else if (lease6 != NULL) { |
905c58b9 | 1216 | safe_lease6_update(lease6, ddns_cb, ddns_cb_set, |
beaed73f | 1217 | file, line); |
98bf1607 SR |
1218 | } else if (ddns_cb->address.len == 4) { |
1219 | struct lease *find_lease = NULL; | |
1220 | if (find_lease_by_ip_addr(&find_lease, | |
1221 | ddns_cb->address, MDL) != 0) { | |
beaed73f SR |
1222 | #if defined (DEBUG_DNS_UPDATES) |
1223 | log_info("%s(%d): find_lease_by_ip_addr(%s) successful:" | |
905c58b9 | 1224 | "lease=%p", file, line, ddns_address, |
beaed73f SR |
1225 | find_lease); |
1226 | #endif | |
905c58b9 | 1227 | |
3221151b | 1228 | safe_lease_update(find_lease, ddns_cb, |
beaed73f | 1229 | ddns_cb_set, file, line); |
98bf1607 SR |
1230 | lease_dereference(&find_lease, MDL); |
1231 | } | |
1232 | else { | |
beaed73f | 1233 | log_error("%s(%d): ddns_update_lease_ptr failed. " |
3221151b | 1234 | "Lease for %s not found.", |
beaed73f | 1235 | file, line, piaddr(ddns_cb->address)); |
beaed73f SR |
1236 | |
1237 | #if defined (DNS_UPDATES_MEMORY_CHECKS) | |
1238 | update_lease_failed(NULL, NULL, ddns_cb, ddns_cb_set, | |
1239 | file, line); | |
1240 | #endif | |
1241 | /* | |
905c58b9 TM |
1242 | * may not reach this. update_lease_failed |
1243 | * calls log_fatal. | |
beaed73f | 1244 | */ |
905c58b9 TM |
1245 | return(ISC_R_FAILURE); |
1246 | ||
98bf1607 SR |
1247 | } |
1248 | } else if (ddns_cb->address.len == 16) { | |
1249 | struct iasubopt *find_lease6 = NULL; | |
1250 | struct ipv6_pool *pool = NULL; | |
1251 | struct in6_addr addr; | |
beaed73f | 1252 | char addrbuf[MAX_ADDRESS_STRING_LEN]; |
98bf1607 SR |
1253 | |
1254 | memcpy(&addr, &ddns_cb->address.iabuf, 16); | |
905c58b9 | 1255 | if ((find_ipv6_pool(&pool, D6O_IA_TA, &addr) != |
98bf1607 | 1256 | ISC_R_SUCCESS) && |
905c58b9 | 1257 | (find_ipv6_pool(&pool, D6O_IA_NA, &addr) != |
98bf1607 | 1258 | ISC_R_SUCCESS)) { |
0ef9a46e | 1259 | inet_ntop(AF_INET6, &addr, addrbuf, |
beaed73f SR |
1260 | MAX_ADDRESS_STRING_LEN); |
1261 | log_error("%s(%d): Pool for lease %s not found.", | |
1262 | file, line, addrbuf); | |
1263 | #if defined (DNS_UPDATES_MEMORY_CHECKS) | |
1264 | update_lease_failed(NULL, NULL, ddns_cb, ddns_cb_set, | |
1265 | file, line); | |
1266 | #endif | |
1267 | /* | |
905c58b9 TM |
1268 | * never reached. update_lease_failed |
1269 | * calls log_fatal. | |
beaed73f | 1270 | */ |
98bf1607 SR |
1271 | return(ISC_R_FAILURE); |
1272 | } | |
1273 | ||
3221151b | 1274 | if (iasubopt_hash_lookup(&find_lease6, pool->leases, |
98bf1607 SR |
1275 | &addr, 16, MDL)) { |
1276 | find_lease6->ddns_cb = ddns_cb_set; | |
1277 | iasubopt_dereference(&find_lease6, MDL); | |
1278 | } else { | |
0ef9a46e | 1279 | inet_ntop(AF_INET6, &addr, addrbuf, |
beaed73f SR |
1280 | MAX_ADDRESS_STRING_LEN); |
1281 | log_error("%s(%d): Lease %s not found within pool.", | |
1282 | file, line, addrbuf); | |
1283 | #if defined (DNS_UPDATES_MEMORY_CHECKS) | |
1284 | update_lease_failed(NULL, NULL, ddns_cb, ddns_cb_set, | |
1285 | file, line); | |
1286 | #endif | |
1287 | /* | |
0cd94b5e TM |
1288 | * not reached when update_lease_failed is called, |
1289 | * it calls log_fatal. | |
beaed73f | 1290 | */ |
0cd94b5e | 1291 | ipv6_pool_dereference(&pool, MDL); |
98bf1607 SR |
1292 | return(ISC_R_FAILURE); |
1293 | } | |
1294 | ipv6_pool_dereference(&pool, MDL); | |
1295 | } else { | |
1296 | /* shouldn't get here */ | |
905c58b9 | 1297 | log_fatal("Impossible condition at %s:%d, called from %s:%d.", |
beaed73f | 1298 | MDL, file, line); |
98bf1607 SR |
1299 | } |
1300 | ||
1301 | return(ISC_R_SUCCESS); | |
905c58b9 | 1302 | } |
98bf1607 SR |
1303 | |
1304 | void | |
1305 | ddns_ptr_add(dhcp_ddns_cb_t *ddns_cb, | |
1306 | isc_result_t eresult) | |
1307 | { | |
1308 | if (eresult == ISC_R_SUCCESS) { | |
7aa153b8 | 1309 | log_info("Added reverse map from %.*s to %.*s", |
98bf1607 SR |
1310 | (int)ddns_cb->rev_name.len, |
1311 | (const char *)ddns_cb->rev_name.data, | |
1312 | (int)ddns_cb->fwd_name.len, | |
1313 | (const char *)ddns_cb->fwd_name.data); | |
1314 | ||
1315 | ddns_update_lease_text(ddns_cb, NULL); | |
1316 | } else { | |
7aa153b8 | 1317 | log_error("Unable to add reverse map from %.*s to %.*s: %s", |
98bf1607 SR |
1318 | (int)ddns_cb->rev_name.len, |
1319 | (const char *)ddns_cb->rev_name.data, | |
1320 | (int)ddns_cb->fwd_name.len, | |
1321 | (const char *)ddns_cb->fwd_name.data, | |
1322 | isc_result_totext (eresult)); | |
1323 | } | |
1324 | ||
beaed73f | 1325 | ddns_update_lease_ptr(NULL, NULL, ddns_cb, NULL, MDL); |
f1208e79 | 1326 | destroy_ddns_cb(ddns_cb, MDL); |
98bf1607 SR |
1327 | /* |
1328 | * A single DDNS operation may require several calls depending on | |
1329 | * the current state as the prerequisites for the first message | |
1330 | * may not succeed requiring a second operation and potentially | |
1331 | * a ptr operation after that. The commit_leases operation is | |
1332 | * invoked at the end of this set of operations in order to require | |
1333 | * a single write for all of the changes. We call commit_leases | |
1334 | * here rather than immediately after the call to update the lease | |
1335 | * text in order to save any previously written data. | |
1336 | */ | |
1337 | commit_leases(); | |
1338 | return; | |
1339 | } | |
1340 | ||
1341 | /* | |
1342 | * action routine when trying to remove a pointer | |
1343 | * this will be called after the ddns queries have completed | |
1344 | * if we succeeded in removing the pointer we go to the next step (if any) | |
1345 | * if not we cleanup and leave. | |
1346 | */ | |
1347 | ||
1348 | void | |
1349 | ddns_ptr_remove(dhcp_ddns_cb_t *ddns_cb, | |
1350 | isc_result_t eresult) | |
1351 | { | |
1352 | isc_result_t result = eresult; | |
1353 | ||
1354 | switch(eresult) { | |
1355 | case ISC_R_SUCCESS: | |
7aa153b8 | 1356 | log_info("Removed reverse map on %.*s", |
98bf1607 SR |
1357 | (int)ddns_cb->rev_name.len, |
1358 | (const char *)ddns_cb->rev_name.data); | |
1359 | /* fall through */ | |
1360 | case DNS_R_NXRRSET: | |
1361 | case DNS_R_NXDOMAIN: | |
1362 | /* No entry is the same as success. | |
1363 | * Remove the information from the lease and | |
1364 | * continue with any next step */ | |
1365 | ddns_update_lease_text(ddns_cb, NULL); | |
1366 | ||
1367 | /* trigger any add operation */ | |
1368 | result = ISC_R_SUCCESS; | |
87132514 SR |
1369 | #if defined (DEBUG_DNS_UPDATES) |
1370 | log_info("DDNS: removed map or no reverse map to remove %.*s", | |
1371 | (int)ddns_cb->rev_name.len, | |
1372 | (const char *)ddns_cb->rev_name.data); | |
1373 | #endif | |
98bf1607 SR |
1374 | break; |
1375 | ||
1376 | default: | |
7aa153b8 | 1377 | log_error("Can't remove reverse map on %.*s: %s", |
98bf1607 SR |
1378 | (int)ddns_cb->rev_name.len, |
1379 | (const char *)ddns_cb->rev_name.data, | |
1380 | isc_result_totext (eresult)); | |
1381 | break; | |
1382 | } | |
1383 | ||
ad06e7ba SR |
1384 | /* If we aren't suppossed to do the next step, set the result |
1385 | * flag so ddns_fwd_srv_connector won't do much | |
1386 | */ | |
1387 | if ((ddns_cb->flags & DDNS_EXECUTE_NEXT) == 0) | |
1388 | result = ISC_R_FAILURE; | |
1389 | ||
beaed73f | 1390 | ddns_update_lease_ptr(NULL, NULL, ddns_cb, NULL, MDL); |
98bf1607 | 1391 | ddns_fwd_srv_connector(NULL, NULL, NULL, ddns_cb->next_op, result); |
f1208e79 | 1392 | destroy_ddns_cb(ddns_cb, MDL); |
98bf1607 SR |
1393 | return; |
1394 | } | |
1395 | ||
1396 | ||
1397 | /* | |
1398 | * If the first query succeeds, the updater can conclude that it | |
1399 | * has added a new name whose only RRs are the A and DHCID RR records. | |
1400 | * The A RR update is now complete (and a client updater is finished, | |
1401 | * while a server might proceed to perform a PTR RR update). | |
1402 | * -- "Interaction between DHCP and DNS" | |
1403 | * | |
1404 | * If the second query succeeds, the updater can conclude that the current | |
1405 | * client was the last client associated with the domain name, and that | |
1406 | * the name now contains the updated A RR. The A RR update is now | |
1407 | * complete (and a client updater is finished, while a server would | |
1408 | * then proceed to perform a PTR RR update). | |
1409 | * -- "Interaction between DHCP and DNS" | |
1410 | * | |
1411 | * If the second query fails with NXRRSET, the updater must conclude | |
905c58b9 TM |
1412 | * that the client's desired name is in use by another host. If |
1413 | * Dual Stack Mixed Mode (DSMM) is enabled and we proceed to a | |
1414 | * third stage forward update attempt specific to DSMM rules. If not, | |
1415 | * then the existing entries are left intact: | |
1416 | * | |
1417 | * At this juncture, the updater can decide (based on some administrative | |
98bf1607 SR |
1418 | * configuration outside of the scope of this document) whether to let |
1419 | * the existing owner of the name keep that name, and to (possibly) | |
1420 | * perform some name disambiguation operation on behalf of the current | |
1421 | * client, or to replace the RRs on the name with RRs that represent | |
1422 | * the current client. If the configured policy allows replacement of | |
1423 | * existing records, the updater submits a query that deletes the | |
1424 | * existing A RR and the existing DHCID RR, adding A and DHCID RRs that | |
1425 | * represent the IP address and client-identity of the new client. | |
1426 | * -- "Interaction between DHCP and DNS" | |
1427 | */ | |
1428 | ||
1429 | void | |
1430 | ddns_fwd_srv_add2(dhcp_ddns_cb_t *ddns_cb, | |
1431 | isc_result_t eresult) | |
1432 | { | |
1433 | isc_result_t result; | |
1434 | const char *logstr = NULL; | |
beaed73f | 1435 | char ddns_address[MAX_ADDRESS_STRING_LEN]; |
98bf1607 | 1436 | |
905c58b9 TM |
1437 | #if defined (DEBUG_DNS_UPDATES) |
1438 | log_info ("DDNS:ddns_fwd_srv_add2: %s eresult: %d", | |
1439 | dump_ddns_cb(ddns_cb), eresult); | |
1440 | #endif | |
1441 | ||
98bf1607 SR |
1442 | /* Construct a printable form of the address for logging */ |
1443 | strcpy(ddns_address, piaddr(ddns_cb->address)); | |
1444 | ||
1445 | switch(eresult) { | |
1446 | case ISC_R_SUCCESS: | |
1447 | log_info("Added new forward map from %.*s to %s", | |
1448 | (int)ddns_cb->fwd_name.len, | |
1449 | (const char *)ddns_cb->fwd_name.data, | |
1450 | ddns_address); | |
1451 | ||
1452 | ddns_update_lease_text(ddns_cb, NULL); | |
1453 | ||
1454 | if ((ddns_cb->flags & DDNS_UPDATE_PTR) != 0) { | |
1455 | /* if we have zone information get rid of it */ | |
1456 | if (ddns_cb->zone != NULL) { | |
1457 | ddns_cb_forget_zone(ddns_cb); | |
1458 | } | |
1459 | ||
1460 | ddns_cb->state = DDNS_STATE_ADD_PTR; | |
1461 | ddns_cb->cur_func = ddns_ptr_add; | |
905c58b9 | 1462 | |
87132514 | 1463 | result = ddns_modify_ptr(ddns_cb, MDL); |
98bf1607 SR |
1464 | if (result == ISC_R_SUCCESS) { |
1465 | return; | |
1466 | } | |
1467 | } | |
1468 | break; | |
1469 | ||
1470 | case DNS_R_YXRRSET: | |
1471 | case DNS_R_YXDOMAIN: | |
1472 | logstr = "DHCID mismatch, belongs to another client."; | |
1473 | break; | |
1474 | ||
98bf1607 | 1475 | case DNS_R_NXDOMAIN: |
905c58b9 TM |
1476 | case DNS_R_NXRRSET: |
1477 | /* If DSMM is on we need to try forward add3 */ | |
1478 | if (ddns_cb->flags & DDNS_DUAL_STACK_MIXED_MODE) { | |
1479 | ddns_cb->state = DDNS_STATE_DSMM_FW_ADD3; | |
1480 | ddns_cb->cur_func = ddns_fwd_srv_add3; | |
1481 | ||
1482 | result = ddns_modify_fwd(ddns_cb, MDL); | |
1483 | if (result == ISC_R_SUCCESS) { | |
1484 | return; | |
1485 | } | |
1486 | ||
1487 | break; | |
1488 | } | |
1489 | ||
98bf1607 SR |
1490 | logstr = "Has an address record but no DHCID, not mine."; |
1491 | break; | |
1492 | ||
1493 | default: | |
1494 | logstr = isc_result_totext(eresult); | |
1495 | break; | |
1496 | } | |
1497 | ||
1498 | if (logstr != NULL) { | |
1499 | log_error("Forward map from %.*s to %s FAILED: %s", | |
1500 | (int)ddns_cb->fwd_name.len, | |
1501 | (const char *)ddns_cb->fwd_name.data, | |
1502 | ddns_address, logstr); | |
1503 | } | |
1504 | ||
beaed73f | 1505 | ddns_update_lease_ptr(NULL, NULL, ddns_cb, NULL, MDL); |
f1208e79 | 1506 | destroy_ddns_cb(ddns_cb, MDL); |
98bf1607 SR |
1507 | /* |
1508 | * A single DDNS operation may require several calls depending on | |
1509 | * the current state as the prerequisites for the first message | |
1510 | * may not succeed requiring a second operation and potentially | |
1511 | * a ptr operation after that. The commit_leases operation is | |
1512 | * invoked at the end of this set of operations in order to require | |
1513 | * a single write for all of the changes. We call commit_leases | |
1514 | * here rather than immediately after the call to update the lease | |
1515 | * text in order to save any previously written data. | |
1516 | */ | |
1517 | commit_leases(); | |
1518 | return; | |
1519 | } | |
1520 | ||
1521 | void | |
1522 | ddns_fwd_srv_add1(dhcp_ddns_cb_t *ddns_cb, | |
1523 | isc_result_t eresult) | |
1524 | { | |
1525 | isc_result_t result; | |
beaed73f | 1526 | char ddns_address[MAX_ADDRESS_STRING_LEN]; |
98bf1607 | 1527 | |
905c58b9 TM |
1528 | #if defined (DEBUG_DNS_UPDATES) |
1529 | log_info ("DDNS: ddns_fwd_srv_add1: %s eresult: %d", | |
1530 | dump_ddns_cb(ddns_cb), eresult); | |
1531 | #endif | |
1532 | ||
98bf1607 SR |
1533 | /* Construct a printable form of the address for logging */ |
1534 | strcpy(ddns_address, piaddr(ddns_cb->address)); | |
1535 | ||
1536 | switch(eresult) { | |
1537 | case ISC_R_SUCCESS: | |
1538 | log_info ("Added new forward map from %.*s to %s", | |
1539 | (int)ddns_cb->fwd_name.len, | |
1540 | (const char *)ddns_cb->fwd_name.data, | |
1541 | ddns_address); | |
1542 | ||
1543 | ddns_update_lease_text(ddns_cb, NULL); | |
1544 | ||
1545 | if ((ddns_cb->flags & DDNS_UPDATE_PTR) != 0) { | |
1546 | /* if we have zone information get rid of it */ | |
1547 | if (ddns_cb->zone != NULL) { | |
1548 | ddns_cb_forget_zone(ddns_cb); | |
1549 | } | |
1550 | ||
1551 | ddns_cb->state = DDNS_STATE_ADD_PTR; | |
1552 | ddns_cb->cur_func = ddns_ptr_add; | |
905c58b9 | 1553 | |
87132514 | 1554 | result = ddns_modify_ptr(ddns_cb, MDL); |
98bf1607 SR |
1555 | if (result == ISC_R_SUCCESS) { |
1556 | return; | |
1557 | } | |
1558 | } | |
98bf1607 SR |
1559 | break; |
1560 | ||
1561 | case DNS_R_YXDOMAIN: | |
1562 | /* we can reuse the zone information */ | |
1563 | ddns_cb->state = DDNS_STATE_ADD_FW_YXDHCID; | |
1564 | ddns_cb->cur_func = ddns_fwd_srv_add2; | |
905c58b9 | 1565 | |
87132514 | 1566 | result = ddns_modify_fwd(ddns_cb, MDL); |
98bf1607 SR |
1567 | if (result == ISC_R_SUCCESS) { |
1568 | return; | |
1569 | } | |
98bf1607 | 1570 | break; |
98bf1607 SR |
1571 | default: |
1572 | log_error ("Unable to add forward map from %.*s to %s: %s", | |
1573 | (int)ddns_cb->fwd_name.len, | |
1574 | (const char *)ddns_cb->fwd_name.data, | |
1575 | ddns_address, | |
1576 | isc_result_totext (eresult)); | |
1577 | break; | |
1578 | } | |
1579 | ||
beaed73f | 1580 | ddns_update_lease_ptr(NULL, NULL, ddns_cb, NULL, MDL); |
f1208e79 | 1581 | destroy_ddns_cb(ddns_cb, MDL); |
98bf1607 SR |
1582 | /* |
1583 | * A single DDNS operation may require several calls depending on | |
1584 | * the current state as the prerequisites for the first message | |
1585 | * may not succeed requiring a second operation and potentially | |
1586 | * a ptr operation after that. The commit_leases operation is | |
1587 | * invoked at the end of this set of operations in order to require | |
1588 | * a single write for all of the changes. We call commit_leases | |
1589 | * here rather than immediately after the call to update the lease | |
1590 | * text in order to save any previously written data. | |
1591 | */ | |
1592 | commit_leases(); | |
1593 | return; | |
1594 | } | |
1595 | ||
905c58b9 TM |
1596 | /* |
1597 | * This action routine is invoked after the DSMM third add stage is | |
1598 | * attempted. If we succeeded we attempt to update the reverse DNS, | |
1599 | * if not we cleanup and leave. | |
1600 | */ | |
1601 | void | |
1602 | ddns_fwd_srv_add3(dhcp_ddns_cb_t *ddns_cb, | |
1603 | isc_result_t eresult) | |
1604 | { | |
1605 | isc_result_t result; | |
1606 | const char *logstr = NULL; | |
e8b058cf | 1607 | char ddns_address[MAX_ADDRESS_STRING_LEN+1]; |
905c58b9 TM |
1608 | |
1609 | #if defined (DEBUG_DNS_UPDATES) | |
1610 | log_info ("DDNS: ddns_fwd_srv_add3: %s eresult: %d", | |
1611 | dump_ddns_cb(ddns_cb), eresult); | |
1612 | #endif | |
1613 | ||
1614 | /* Construct a printable form of the address for logging */ | |
e8b058cf TM |
1615 | memset(ddns_address, 0x0, sizeof(ddns_address)); |
1616 | strncpy(ddns_address, piaddr(ddns_cb->address), | |
1617 | sizeof(ddns_address) - 1); | |
905c58b9 TM |
1618 | |
1619 | switch(eresult) { | |
1620 | case ISC_R_SUCCESS: | |
1621 | log_info("Added new forward map from %.*s to %s", | |
1622 | (int)ddns_cb->fwd_name.len, | |
1623 | (const char *)ddns_cb->fwd_name.data, | |
1624 | ddns_address); | |
1625 | ||
1626 | ddns_update_lease_text(ddns_cb, NULL); | |
1627 | ||
1628 | if ((ddns_cb->flags & DDNS_UPDATE_PTR) != 0) { | |
1629 | /* if we have zone information get rid of it */ | |
1630 | if (ddns_cb->zone != NULL) { | |
1631 | ddns_cb_forget_zone(ddns_cb); | |
1632 | } | |
1633 | ||
1634 | ddns_cb->state = DDNS_STATE_ADD_PTR; | |
1635 | ddns_cb->cur_func = ddns_ptr_add; | |
1636 | ||
1637 | result = ddns_modify_ptr(ddns_cb, MDL); | |
1638 | if (result == ISC_R_SUCCESS) { | |
1639 | return; | |
1640 | } | |
1641 | } | |
1642 | break; | |
1643 | ||
1644 | case DNS_R_YXRRSET: | |
1645 | logstr = "an entry that is either static or " | |
1646 | "owned by another client exists."; | |
1647 | break; | |
1648 | ||
1649 | case DNS_R_NXRRSET: | |
1650 | logstr = "static entry of the other protocol type exists."; | |
1651 | break; | |
1652 | ||
1653 | default: | |
1654 | logstr = isc_result_totext(eresult); | |
1655 | break; | |
1656 | } | |
1657 | ||
1658 | if (logstr != NULL) { | |
1659 | log_error("Forward map from %.*s to %s FAILED: %s", | |
1660 | (int)ddns_cb->fwd_name.len, | |
1661 | (const char *)ddns_cb->fwd_name.data, | |
1662 | ddns_address, logstr); | |
1663 | } | |
1664 | ||
1665 | ddns_update_lease_ptr(NULL, NULL, ddns_cb, NULL, MDL); | |
f1208e79 | 1666 | destroy_ddns_cb(ddns_cb, MDL); |
905c58b9 TM |
1667 | /* |
1668 | * A single DDNS operation may require several calls depending on | |
1669 | * the current state as the prerequisites for the first message | |
1670 | * may not succeed requiring a second operation and potentially | |
1671 | * a ptr operation after that. The commit_leases operation is | |
1672 | * invoked at the end of this set of operations in order to require | |
1673 | * a single write for all of the changes. We call commit_leases | |
1674 | * here rather than immediately after the call to update the lease | |
1675 | * text in order to save any previously written data. | |
1676 | */ | |
1677 | commit_leases(); | |
1678 | return; | |
1679 | } | |
1680 | ||
98bf1607 SR |
1681 | static void |
1682 | ddns_fwd_srv_connector(struct lease *lease, | |
1683 | struct iasubopt *lease6, | |
1684 | struct binding_scope **inscope, | |
1685 | dhcp_ddns_cb_t *ddns_cb, | |
1686 | isc_result_t eresult) | |
1687 | { | |
1688 | isc_result_t result = ISC_R_FAILURE; | |
1689 | ||
905c58b9 TM |
1690 | #if defined (DEBUG_DNS_UPDATES) |
1691 | log_info ("DDNS: ddns_fwd_srv_connector: %s eresult: %d", | |
1692 | dump_ddns_cb(ddns_cb), eresult); | |
1693 | #endif | |
1694 | ||
98bf1607 SR |
1695 | if (ddns_cb == NULL) { |
1696 | /* nothing to do */ | |
1697 | return; | |
1698 | } | |
1699 | ||
1700 | if (eresult == ISC_R_SUCCESS) { | |
1701 | /* | |
1702 | * If we have updates dispatch as appropriate, | |
1703 | * if not do FQDN binding if desired. | |
1704 | */ | |
1705 | ||
1706 | if (ddns_cb->flags & DDNS_UPDATE_ADDR) { | |
1707 | ddns_cb->state = DDNS_STATE_ADD_FW_NXDOMAIN; | |
1708 | ddns_cb->cur_func = ddns_fwd_srv_add1; | |
87132514 | 1709 | result = ddns_modify_fwd(ddns_cb, MDL); |
98bf1607 SR |
1710 | } else if ((ddns_cb->flags & DDNS_UPDATE_PTR) && |
1711 | (ddns_cb->rev_name.len != 0)) { | |
1712 | ddns_cb->state = DDNS_STATE_ADD_PTR; | |
1713 | ddns_cb->cur_func = ddns_ptr_add; | |
87132514 | 1714 | result = ddns_modify_ptr(ddns_cb, MDL); |
98bf1607 SR |
1715 | } else { |
1716 | ddns_update_lease_text(ddns_cb, inscope); | |
1717 | } | |
1718 | } | |
1719 | ||
905c58b9 | 1720 | |
98bf1607 | 1721 | if (result == ISC_R_SUCCESS) { |
beaed73f | 1722 | ddns_update_lease_ptr(lease, lease6, ddns_cb, ddns_cb, MDL); |
98bf1607 | 1723 | } else { |
f1208e79 | 1724 | destroy_ddns_cb(ddns_cb, MDL); |
98bf1607 SR |
1725 | } |
1726 | ||
1727 | return; | |
1728 | } | |
1729 | ||
1730 | /* | |
1731 | * If the first query fails, the updater MUST NOT delete the DNS name. It | |
1732 | * may be that the host whose lease on the server has expired has moved | |
1733 | * to another network and obtained a lease from a different server, | |
1734 | * which has caused the client's A RR to be replaced. It may also be | |
1735 | * that some other client has been configured with a name that matches | |
1736 | * the name of the DHCP client, and the policy was that the last client | |
1737 | * to specify the name would get the name. In this case, the DHCID RR | |
1738 | * will no longer match the updater's notion of the client-identity of | |
1739 | * the host pointed to by the DNS name. | |
1740 | * -- "Interaction between DHCP and DNS" | |
1741 | */ | |
1742 | ||
1743 | void | |
1744 | ddns_fwd_srv_rem2(dhcp_ddns_cb_t *ddns_cb, | |
1745 | isc_result_t eresult) | |
1746 | { | |
905c58b9 TM |
1747 | #if defined (DEBUG_DNS_UPDATES) |
1748 | log_info ("DDNS: ddns_fwd_srv_rem2: %s eresult: %d", | |
1749 | dump_ddns_cb(ddns_cb), eresult); | |
1750 | #endif | |
ad06e7ba SR |
1751 | |
1752 | /* | |
1753 | * To get here we have already managed to remove the A/AAAA | |
1754 | * record and are trying to remove the DHCID/TXT record as well. | |
1755 | * On success (removed DHCID/TXT) or YXRRSET (DHCID/TXT still in | |
1756 | * use by something else) we clean up the lease. | |
1757 | * On some other error we don't clean up the lease and hope that | |
1758 | * if we try this again it will work. An example would be if we | |
1759 | * got a timeout as the DNS server halted between the first and | |
1760 | * second steps. The DNS server would still have the DHCID/TXT | |
1761 | * and we would like to remove that in the future. | |
1762 | * | |
1763 | * On success set the EXECUTE_NEXT flag which triggers any | |
1764 | * add that is next in the chain. | |
1765 | */ | |
1766 | if ((eresult == ISC_R_SUCCESS) || | |
1767 | (eresult == DNS_R_YXRRSET)) { | |
98bf1607 | 1768 | ddns_update_lease_text(ddns_cb, NULL); |
ad06e7ba SR |
1769 | eresult = ISC_R_SUCCESS; |
1770 | } | |
98bf1607 | 1771 | |
ad06e7ba SR |
1772 | /* Do the next operation */ |
1773 | if ((ddns_cb->flags & DDNS_UPDATE_PTR) != 0) { | |
1774 | /* if we have zone information get rid of it */ | |
1775 | if (ddns_cb->zone != NULL) { | |
1776 | ddns_cb_forget_zone(ddns_cb); | |
1777 | } | |
98bf1607 | 1778 | |
ad06e7ba SR |
1779 | ddns_cb->state = DDNS_STATE_REM_PTR; |
1780 | ddns_cb->cur_func = ddns_ptr_remove; | |
1781 | if (eresult == ISC_R_SUCCESS) | |
1782 | ddns_cb->flags |= DDNS_EXECUTE_NEXT; | |
1783 | ||
1784 | eresult = ddns_modify_ptr(ddns_cb, MDL); | |
1785 | if (eresult == ISC_R_SUCCESS) { | |
1786 | return; | |
98bf1607 SR |
1787 | } |
1788 | } | |
1789 | ||
beaed73f | 1790 | ddns_update_lease_ptr(NULL, NULL, ddns_cb, NULL, MDL); |
98bf1607 | 1791 | ddns_fwd_srv_connector(NULL, NULL, NULL, ddns_cb->next_op, eresult); |
f1208e79 | 1792 | destroy_ddns_cb(ddns_cb, MDL); |
98bf1607 SR |
1793 | return; |
1794 | } | |
1795 | ||
1796 | ||
1797 | /* | |
1798 | * First action routine when trying to remove a fwd | |
1799 | * this will be called after the ddns queries have completed | |
1800 | * if we succeeded in removing the fwd we go to the next step (if any) | |
1801 | * if not we cleanup and leave. | |
1802 | */ | |
1803 | ||
1804 | void | |
1805 | ddns_fwd_srv_rem1(dhcp_ddns_cb_t *ddns_cb, | |
1806 | isc_result_t eresult) | |
1807 | { | |
1808 | isc_result_t result = eresult; | |
beaed73f | 1809 | char ddns_address[MAX_ADDRESS_STRING_LEN]; |
98bf1607 | 1810 | |
905c58b9 TM |
1811 | #if defined (DEBUG_DNS_UPDATES) |
1812 | log_info ("DDNS: ddns_fwd_srv_rem1: %s eresult: %d", | |
1813 | dump_ddns_cb(ddns_cb), eresult); | |
1814 | #endif | |
1815 | ||
98bf1607 SR |
1816 | switch(eresult) { |
1817 | case ISC_R_SUCCESS: | |
7aa153b8 SR |
1818 | /* Construct a printable form of the address for logging */ |
1819 | strcpy(ddns_address, piaddr(ddns_cb->address)); | |
1820 | log_info("Removed forward map from %.*s to %s", | |
905c58b9 | 1821 | (int)ddns_cb->fwd_name.len, |
7aa153b8 SR |
1822 | (const char*)ddns_cb->fwd_name.data, |
1823 | ddns_address); | |
1824 | ||
98bf1607 SR |
1825 | /* Do the second step of the FWD removal */ |
1826 | ddns_cb->state = DDNS_STATE_REM_FW_NXRR; | |
1827 | ddns_cb->cur_func = ddns_fwd_srv_rem2; | |
87132514 | 1828 | result = ddns_modify_fwd(ddns_cb, MDL); |
98bf1607 SR |
1829 | if (result == ISC_R_SUCCESS) { |
1830 | return; | |
1831 | } | |
1832 | break; | |
1833 | ||
1834 | case DNS_R_NXRRSET: | |
1835 | case DNS_R_NXDOMAIN: | |
905c58b9 TM |
1836 | /* A result of not found means rem1 did not find a guard of |
1837 | * our * type. From this we assume either there are no address | |
1838 | * record(s) of our type to delete or they are unguarded and | |
1839 | * therefore presumed to be static. Either way, we're done | |
1840 | * unless we're in DSMM and ddns-other-guard-is-dynamic is on. | |
1841 | * In which case we need to see if a guard of the other type | |
1842 | * exists, which permits us to delete any address records of | |
1843 | * our type. */ | |
1844 | #define DSMM_OGD (DDNS_DUAL_STACK_MIXED_MODE | \ | |
1845 | DDNS_OTHER_GUARD_IS_DYNAMIC) | |
1846 | if ((ddns_cb->flags & DSMM_OGD) == DSMM_OGD) { | |
1847 | ddns_cb->state = DDNS_STATE_REM_FW_DSMM_OTHER; | |
1848 | ddns_cb->cur_func = ddns_fwd_srv_rem2; | |
1849 | result = ddns_modify_fwd(ddns_cb, MDL); | |
1850 | if (result == ISC_R_SUCCESS) { | |
1851 | return; | |
1852 | } | |
1853 | break; | |
1854 | } | |
1855 | ||
98bf1607 SR |
1856 | ddns_update_lease_text(ddns_cb, NULL); |
1857 | ||
87132514 SR |
1858 | #if defined (DEBUG_DNS_UPDATES) |
1859 | log_info("DDNS: no forward map to remove. %p", ddns_cb); | |
1860 | #endif | |
ad06e7ba SR |
1861 | /* Trigger the add operation */ |
1862 | eresult = ISC_R_SUCCESS; | |
1863 | ||
1864 | /* Fall through */ | |
1865 | default: | |
1866 | ||
1867 | /* We do the remove operation in most cases | |
1868 | * but we don't want to continue with adding a forward | |
1869 | * record if the forward removal had issues so we | |
1870 | * check the eresult and set the EXECUTE_NEXT flag on | |
1871 | * success. | |
1872 | */ | |
1873 | ||
1874 | /* Do the remove operation */ | |
98bf1607 SR |
1875 | if ((ddns_cb->flags & DDNS_UPDATE_PTR) != 0) { |
1876 | /* if we have zone information get rid of it */ | |
1877 | if (ddns_cb->zone != NULL) { | |
1878 | ddns_cb_forget_zone(ddns_cb); | |
1879 | } | |
1880 | ||
1881 | ddns_cb->state = DDNS_STATE_REM_PTR; | |
1882 | ddns_cb->cur_func = ddns_ptr_remove; | |
ad06e7ba SR |
1883 | if (eresult == ISC_R_SUCCESS) |
1884 | ddns_cb->flags |= DDNS_EXECUTE_NEXT; | |
1885 | ||
87132514 | 1886 | result = ddns_modify_ptr(ddns_cb, MDL); |
98bf1607 SR |
1887 | if (result == ISC_R_SUCCESS) { |
1888 | return; | |
1889 | } | |
1890 | } | |
98bf1607 SR |
1891 | break; |
1892 | } | |
1893 | ||
beaed73f | 1894 | ddns_update_lease_ptr(NULL, NULL, ddns_cb, NULL, MDL); |
98bf1607 | 1895 | ddns_fwd_srv_connector(NULL, NULL, NULL, ddns_cb->next_op, eresult); |
f1208e79 | 1896 | destroy_ddns_cb(ddns_cb, MDL); |
98bf1607 SR |
1897 | } |
1898 | ||
d13db163 | 1899 | /*%< |
98bf1607 SR |
1900 | * Remove relevant entries from DNS. |
1901 | * | |
d13db163 | 1902 | * \li lease - lease to start with if this is for v4 |
905c58b9 | 1903 | * |
d13db163 | 1904 | * \li lease6 - lease to start with if this is for v6 |
905c58b9 | 1905 | * |
d13db163 SR |
1906 | * \li add_ddns_cb - control block for additional DDNS work. This |
1907 | * is used when the code is going to add a DDNS entry after removing | |
1908 | * the current entry. | |
905c58b9 | 1909 | * |
d13db163 SR |
1910 | * \li active - indication about the status of the lease. It is |
1911 | * ISC_TRUE if the lease is still active, and FALSE if the lease | |
1912 | * is inactive. This is used to indicate if the lease is inactive or going | |
1913 | * to inactive so we can avoid trying to update the lease with cb pointers | |
1914 | * and text information if it isn't useful. | |
905c58b9 | 1915 | * |
d13db163 SR |
1916 | * Returns |
1917 | * \li #ISC_R_FAILURE - badness occurred and we weren't able to do what was wanted | |
1918 | * \li #ISC_R_SUCCESS - we were able to do stuff but it's in progress | |
1919 | * | |
1920 | * in both cases any additional block has been passed on to it's handler | |
98bf1607 SR |
1921 | */ |
1922 | ||
d13db163 | 1923 | isc_result_t |
98bf1607 SR |
1924 | ddns_removals(struct lease *lease, |
1925 | struct iasubopt *lease6, | |
0ef9a46e SR |
1926 | dhcp_ddns_cb_t *add_ddns_cb, |
1927 | isc_boolean_t active) | |
385fcb27 | 1928 | { |
98bf1607 SR |
1929 | isc_result_t rcode, execute_add = ISC_R_FAILURE; |
1930 | struct binding_scope **scope = NULL; | |
d13db163 | 1931 | isc_result_t result = ISC_R_FAILURE; |
919f1407 | 1932 | dhcp_ddns_cb_t *ddns_cb = NULL; |
98bf1607 | 1933 | struct data_string leaseid; |
b992d7e2 | 1934 | |
905c58b9 TM |
1935 | #if defined (DEBUG_DNS_UPDATES) |
1936 | log_info ("DDNS: ddns_removals: %s", | |
1937 | dump_ddns_cb(add_ddns_cb)); | |
1938 | #endif | |
1939 | ||
919f1407 | 1940 | /* |
d13db163 SR |
1941 | * See if we need to cancel an outstanding request. Mostly this is |
1942 | * used to handle the case where this routine is called twice for | |
1943 | * the same release or abandon event. | |
905c58b9 | 1944 | * |
d13db163 SR |
1945 | * When called from the dns code as part of an update request |
1946 | * (add_ddns_cb != NULL) any outstanding requests will have already | |
1947 | * been cancelled. | |
905c58b9 | 1948 | * |
d13db163 SR |
1949 | * If the new request is just a removal and we have an outstanding |
1950 | * request we have several options: | |
1951 | * | |
1952 | * - we are doing an update or we are doing a removal and the active | |
1953 | * flag has changed from TRUE to FALSE. In these cases we need to | |
1954 | * cancel the old request and start the new one. | |
1955 | * | |
1956 | * - other wise we are doing a removal with the active flag unchanged. | |
1957 | * In this case we can let the current removal continue and do not need | |
1958 | * to start a new one. If the old request included an update to be | |
1959 | * done after the removal we need to kill the update part of the | |
1960 | * request. | |
919f1407 | 1961 | */ |
905c58b9 | 1962 | |
d13db163 SR |
1963 | if (add_ddns_cb == NULL) { |
1964 | if ((lease != NULL) && (lease->ddns_cb != NULL)) { | |
1965 | ddns_cb = lease->ddns_cb; | |
1966 | ||
1967 | /* | |
905c58b9 | 1968 | * Is the old request an update or did the |
d13db163 SR |
1969 | * the active flag change? |
1970 | */ | |
1971 | if (((ddns_cb->state == DDNS_STATE_ADD_PTR) || | |
1972 | (ddns_cb->state == DDNS_STATE_ADD_FW_NXDOMAIN) || | |
1973 | (ddns_cb->state == DDNS_STATE_ADD_FW_YXDHCID)) || | |
1974 | ((active == ISC_FALSE) && | |
1975 | ((ddns_cb->flags & DDNS_ACTIVE_LEASE) != 0))) { | |
1976 | /* Cancel the current request */ | |
1977 | ddns_cancel(lease->ddns_cb, MDL); | |
1978 | lease->ddns_cb = NULL; | |
1979 | } else { | |
1980 | /* Remvoval, check and remove updates */ | |
1981 | if (ddns_cb->next_op != NULL) { | |
f1208e79 | 1982 | destroy_ddns_cb(ddns_cb->next_op, MDL); |
d13db163 SR |
1983 | ddns_cb->next_op = NULL; |
1984 | } | |
1985 | #if defined (DEBUG_DNS_UPDATES) | |
1986 | log_info("DDNS %s(%d): removal already in " | |
1987 | "progress new ddns_cb=%p", | |
1988 | MDL, ddns_cb); | |
1989 | #endif | |
1990 | return (ISC_R_SUCCESS); | |
1991 | } | |
1992 | } else if ((lease6 != NULL) && (lease6->ddns_cb != NULL)) { | |
1993 | ddns_cb = lease6->ddns_cb; | |
1994 | ||
1995 | /* | |
905c58b9 | 1996 | * Is the old request an update or did the |
d13db163 SR |
1997 | * the active flag change? |
1998 | */ | |
1999 | if (((ddns_cb->state == DDNS_STATE_ADD_PTR) || | |
2000 | (ddns_cb->state == DDNS_STATE_ADD_FW_NXDOMAIN) || | |
2001 | (ddns_cb->state == DDNS_STATE_ADD_FW_YXDHCID)) || | |
2002 | ((active == ISC_FALSE) && | |
2003 | ((ddns_cb->flags & DDNS_ACTIVE_LEASE) != 0))) { | |
2004 | /* Cancel the current request */ | |
2005 | ddns_cancel(lease6->ddns_cb, MDL); | |
2006 | lease6->ddns_cb = NULL; | |
2007 | } else { | |
2008 | /* Remvoval, check and remove updates */ | |
2009 | if (ddns_cb->next_op != NULL) { | |
f1208e79 | 2010 | destroy_ddns_cb(ddns_cb->next_op, MDL); |
d13db163 SR |
2011 | ddns_cb->next_op = NULL; |
2012 | } | |
2013 | #if defined (DEBUG_DNS_UPDATES) | |
2014 | log_info("DDNS %s(%d): removal already in " | |
2015 | "progress new ddns_cb=%p", | |
2016 | MDL, ddns_cb); | |
2017 | #endif | |
2018 | return (ISC_R_SUCCESS); | |
2019 | } | |
2020 | } | |
2021 | ddns_cb = NULL; | |
d208bb04 | 2022 | } |
919f1407 | 2023 | |
98bf1607 SR |
2024 | /* allocate our control block */ |
2025 | ddns_cb = ddns_cb_alloc(MDL); | |
2026 | if (ddns_cb == NULL) { | |
2027 | goto cleanup; | |
2028 | } | |
3221151b | 2029 | |
905c58b9 TM |
2030 | /* Set the conflict detection flags based on global configuration */ |
2031 | copy_conflict_flags(&ddns_cb->flags, ddns_conflict_mask); | |
2032 | ||
3221151b SR |
2033 | /* |
2034 | * For v4 we flag static leases so we don't try | |
2035 | * and manipulate the lease later. For v6 we don't | |
2036 | * get static leases and don't need to flag them. | |
2037 | */ | |
98bd7ca0 DH |
2038 | if (lease != NULL) { |
2039 | scope = &(lease->scope); | |
98bf1607 | 2040 | ddns_cb->address = lease->ip_addr; |
3221151b SR |
2041 | if (lease->flags & STATIC_LEASE) |
2042 | ddns_cb->flags |= DDNS_STATIC_LEASE; | |
98bd7ca0 DH |
2043 | } else if (lease6 != NULL) { |
2044 | scope = &(lease6->scope); | |
98bf1607 SR |
2045 | memcpy(&ddns_cb->address.iabuf, lease6->addr.s6_addr, 16); |
2046 | ddns_cb->address.len = 16; | |
98bd7ca0 | 2047 | } else |
98bf1607 | 2048 | goto cleanup; |
98bd7ca0 | 2049 | |
0ef9a46e SR |
2050 | /* |
2051 | * Set the flag bit if the lease is active, that is it isn't | |
d13db163 SR |
2052 | * expired or released. This is used to determine if we need |
2053 | * to update the scope information for both v4 and v6 and | |
2054 | * the lease information for v6 when the response | |
0ef9a46e SR |
2055 | * from the DNS code is processed. |
2056 | */ | |
2057 | if (active == ISC_TRUE) { | |
2058 | ddns_cb->flags |= DDNS_ACTIVE_LEASE; | |
2059 | } | |
2060 | ||
b992d7e2 | 2061 | /* No scope implies that DDNS has not been performed for this lease. */ |
98bd7ca0 | 2062 | if (*scope == NULL) |
98bf1607 | 2063 | goto cleanup; |
b992d7e2 | 2064 | |
d7d9c0c7 SR |
2065 | if ((ddns_update_style != DDNS_UPDATE_STYLE_STANDARD) && |
2066 | (ddns_update_style != DDNS_UPDATE_STYLE_INTERIM)) | |
98bf1607 SR |
2067 | goto cleanup; |
2068 | ||
2069 | /* Assume that we are removing both records */ | |
3221151b | 2070 | ddns_cb->flags |= DDNS_UPDATE_ADDR | DDNS_UPDATE_PTR; |
98bf1607 SR |
2071 | |
2072 | /* and that we want to do the add call */ | |
2073 | execute_add = ISC_R_SUCCESS; | |
98311e4b | 2074 | |
b992d7e2 DN |
2075 | /* |
2076 | * Look up stored names. | |
2077 | */ | |
b992d7e2 | 2078 | |
b992d7e2 | 2079 | /* |
98bf1607 SR |
2080 | * Find the fwd name and copy it to the control block. If we don't |
2081 | * have it we can't delete the fwd record but we can still try to | |
2082 | * remove the ptr record and cleanup the lease information if the | |
2083 | * client did the fwd update. | |
b992d7e2 | 2084 | */ |
98bf1607 SR |
2085 | if (!find_bound_string(&ddns_cb->fwd_name, *scope, "ddns-fwd-name")) { |
2086 | /* don't try and delete the A, or do the add */ | |
2087 | ddns_cb->flags &= ~DDNS_UPDATE_ADDR; | |
2088 | execute_add = ISC_R_FAILURE; | |
2089 | ||
2090 | /* Check if client did update */ | |
2091 | if (find_bound_string(&ddns_cb->fwd_name, *scope, | |
2092 | "ddns-client-fqdn")) { | |
2093 | ddns_cb->flags |= DDNS_CLIENT_DID_UPDATE; | |
2094 | } | |
b992d7e2 DN |
2095 | } |
2096 | ||
98bf1607 | 2097 | /* |
905c58b9 TM |
2098 | * Find the txt or dhcid tag and copy it to the control block. If we |
2099 | * don't have one this isn't an interim or standard record so we can't | |
2100 | * delete the A record using this mechanism but we can delete the ptr | |
2101 | * record. In this case we will attempt to do any requested next step. | |
98bf1607 SR |
2102 | */ |
2103 | memset(&leaseid, 0, sizeof(leaseid)); | |
d7d9c0c7 SR |
2104 | if (find_bound_string (&leaseid, *scope, ddns_standard_tag)) { |
2105 | /* We have a standard tag */ | |
2106 | ddns_cb->lease_tag = ddns_standard_tag; | |
2107 | ddns_cb->dhcid_class = dns_rdatatype_dhcid; | |
905c58b9 | 2108 | ddns_cb->other_dhcid_class = dns_rdatatype_txt; |
d7d9c0c7 SR |
2109 | data_string_copy(&ddns_cb->dhcid, &leaseid, MDL); |
2110 | data_string_forget(&leaseid, MDL); | |
2111 | } else if (find_bound_string (&leaseid, *scope, ddns_interim_tag)) { | |
2112 | /* we have an interim tag */ | |
2113 | ddns_cb->lease_tag = ddns_interim_tag; | |
2114 | ddns_cb->dhcid_class = dns_rdatatype_txt; | |
905c58b9 TM |
2115 | ddns_cb->other_dhcid_class = dns_rdatatype_dhcid; |
2116 | if (dhcid_fromlease(&ddns_cb->dhcid, &leaseid) != | |
98bf1607 SR |
2117 | ISC_R_SUCCESS) { |
2118 | /* We couldn't convert the dhcid from the lease | |
2119 | * version to the dns version. We can't delete | |
2120 | * the A record but can continue to the ptr | |
2121 | */ | |
2122 | ddns_cb->flags &= ~DDNS_UPDATE_ADDR; | |
2123 | } | |
2124 | data_string_forget(&leaseid, MDL); | |
d7d9c0c7 SR |
2125 | } else { |
2126 | ddns_cb->flags &= ~DDNS_UPDATE_ADDR; | |
905c58b9 | 2127 | } |
478028e7 | 2128 | |
98bf1607 SR |
2129 | /* |
2130 | * Find the rev name and copy it to the control block. If we don't | |
2131 | * have it we can't get rid of it but we can try to remove the fwd | |
2132 | * pointer if desired. | |
2133 | */ | |
2134 | if (!find_bound_string(&ddns_cb->rev_name, *scope, "ddns-rev-name")) { | |
2135 | ddns_cb->flags &= ~DDNS_UPDATE_PTR; | |
478028e7 | 2136 | } |
905c58b9 TM |
2137 | |
2138 | ||
98bf1607 SR |
2139 | /* |
2140 | * If we have a second control block for doing an add | |
2141 | * after the remove finished attach it to our control block. | |
2142 | */ | |
2143 | ddns_cb->next_op = add_ddns_cb; | |
478028e7 | 2144 | |
b992d7e2 | 2145 | /* |
98bf1607 SR |
2146 | * Now that we've collected the information we can try to process it. |
2147 | * If necessary we call an appropriate routine to send a message and | |
2148 | * provide it with an action routine to run on the control block given | |
2149 | * the results of the message. We have three entry points from here, | |
2150 | * one for removing the A record, the next for removing the PTR and | |
2151 | * the third for doing any requested add. | |
b992d7e2 | 2152 | */ |
98bf1607 SR |
2153 | if ((ddns_cb->flags & DDNS_UPDATE_ADDR) != 0) { |
2154 | if (ddns_cb->fwd_name.len != 0) { | |
2155 | ddns_cb->state = DDNS_STATE_REM_FW_YXDHCID; | |
2156 | ddns_cb->cur_func = ddns_fwd_srv_rem1; | |
2157 | ||
87132514 | 2158 | rcode = ddns_modify_fwd(ddns_cb, MDL); |
98bf1607 SR |
2159 | if (rcode == ISC_R_SUCCESS) { |
2160 | ddns_update_lease_ptr(lease, lease6, ddns_cb, | |
beaed73f | 2161 | ddns_cb, MDL); |
d13db163 | 2162 | return (ISC_R_SUCCESS); |
98bf1607 | 2163 | } |
478028e7 | 2164 | |
98bf1607 SR |
2165 | /* |
2166 | * We weren't able to process the request tag the | |
2167 | * add so we won't execute it. | |
2168 | */ | |
2169 | execute_add = ISC_R_FAILURE; | |
2170 | goto cleanup; | |
2171 | } | |
2172 | else { | |
2173 | /*remove info from scope */ | |
2174 | unset(*scope, "ddns-fwd-name"); | |
d7d9c0c7 | 2175 | unset(*scope, ddns_cb->lease_tag); |
98bf1607 SR |
2176 | } |
2177 | } | |
b992d7e2 | 2178 | |
98bf1607 SR |
2179 | if ((ddns_cb->flags & DDNS_UPDATE_PTR) != 0) { |
2180 | ddns_cb->state = DDNS_STATE_REM_PTR; | |
2181 | ddns_cb->cur_func = ddns_ptr_remove; | |
ad06e7ba | 2182 | ddns_cb->flags |= DDNS_EXECUTE_NEXT; |
98bf1607 SR |
2183 | |
2184 | /* | |
2185 | * if execute add isn't success remove the control block so | |
2186 | * it won't be processed when the remove completes. We | |
2187 | * also arrange to clean it up and get rid of it. | |
2188 | */ | |
2189 | if (execute_add != ISC_R_SUCCESS) { | |
2190 | ddns_cb->next_op = NULL; | |
905c58b9 | 2191 | ddns_fwd_srv_connector(lease, lease6, scope, |
98bf1607 SR |
2192 | add_ddns_cb, execute_add); |
2193 | add_ddns_cb = NULL; | |
2194 | } | |
2195 | else { | |
d13db163 | 2196 | result = ISC_R_SUCCESS; |
98bf1607 SR |
2197 | } |
2198 | ||
87132514 | 2199 | rcode = ddns_modify_ptr(ddns_cb, MDL); |
98bf1607 | 2200 | if (rcode == ISC_R_SUCCESS) { |
beaed73f SR |
2201 | ddns_update_lease_ptr(lease, lease6, ddns_cb, ddns_cb, |
2202 | MDL); | |
d13db163 | 2203 | return (result); |
98bf1607 SR |
2204 | } |
2205 | ||
2206 | /* We weren't able to process the request tag the | |
2207 | * add so we won't execute it */ | |
2208 | execute_add = ISC_R_FAILURE; | |
2209 | goto cleanup; | |
2210 | } | |
2211 | ||
2212 | cleanup: | |
2213 | /* | |
2214 | * We've gotten here because we didn't need to send a message or | |
2215 | * we failed when trying to do so. We send the additional cb | |
2216 | * off to handle sending and/or cleanup and cleanup anything | |
2217 | * we allocated here. | |
2218 | */ | |
2219 | ddns_fwd_srv_connector(lease, lease6, scope, add_ddns_cb, execute_add); | |
905c58b9 | 2220 | if (ddns_cb != NULL) |
f1208e79 | 2221 | destroy_ddns_cb(ddns_cb, MDL); |
98bf1607 | 2222 | |
d13db163 | 2223 | return (result); |
b992d7e2 DN |
2224 | } |
2225 | ||
905c58b9 TM |
2226 | /* Convenience function for setting flag bits in a mask */ |
2227 | void set_flag (u_int16_t *flags, | |
2228 | u_int16_t flag, | |
2229 | u_int16_t value) { | |
2230 | if (flags) { | |
2231 | if (value) { | |
2232 | *flags |= flag; | |
2233 | } else { | |
2234 | *flags &= ~flag; | |
2235 | } | |
2236 | } | |
2237 | } | |
2238 | ||
2239 | /* | |
2240 | * Convenience function which replicates the conflict flags set in one | |
2241 | * mask to another, while preserving all other flags. | |
2242 | */ | |
2243 | void copy_conflict_flags(u_int16_t *target, | |
2244 | u_int16_t source) { | |
2245 | if (target) { | |
2246 | /* Preserve non conflict flags */ | |
2247 | *target &= ~CONFLICT_BITS; | |
2248 | ||
2249 | /* Enable conflict flags per source */ | |
2250 | *target |= source & CONFLICT_BITS; | |
2251 | } | |
2252 | } | |
2253 | ||
2254 | /* | |
2255 | * Given an option_state, create a mask of conflict detection flags based | |
2256 | * on the appropriate configuration parameters within the option state. | |
2257 | */ | |
2258 | u_int16_t | |
2259 | get_conflict_mask(struct option_state *options) { | |
2260 | ||
2261 | int ddns_update_conflict_detection = 1; /* default on */ | |
2262 | int ddns_dual_stack_mixed_mode = 0; /* default off */ | |
2263 | int ddns_guard_id_must_match = 1; /* default on */ | |
2264 | int ddns_other_guard_is_dynamic = 0; /* default off */ | |
2265 | struct option_cache *oc = NULL; | |
2266 | ||
2267 | u_int16_t mask = 0; | |
2268 | oc = lookup_option(&server_universe, options, SV_DDNS_CONFLICT_DETECT); | |
2269 | if (oc) { | |
2270 | ddns_update_conflict_detection = | |
2271 | evaluate_boolean_option_cache(NULL, NULL, NULL, NULL, options, | |
2272 | NULL, &global_scope, oc, MDL); | |
2273 | } | |
2274 | ||
2275 | set_flag(&mask, DDNS_CONFLICT_DETECTION, | |
2276 | ddns_update_conflict_detection); | |
2277 | ||
2278 | if (!ddns_update_conflict_detection) { | |
2279 | #if defined (DEBUG_DNS_UPDATES) | |
2280 | log_info ("DDNS conflict detection: off"); | |
2281 | #endif | |
2282 | /* Turn the rest of the conflict related flags off */ | |
2283 | set_flag(&mask, DDNS_DUAL_STACK_MIXED_MODE, 0); | |
2284 | set_flag(&mask, DDNS_GUARD_ID_MUST_MATCH, 0); | |
2285 | set_flag(&mask, DDNS_OTHER_GUARD_IS_DYNAMIC, 0); | |
2286 | return (mask); | |
2287 | } | |
2288 | ||
2289 | // Get the values | |
2290 | oc = lookup_option(&server_universe, options, | |
2291 | SV_DDNS_DUAL_STACK_MIXED_MODE); | |
2292 | if (oc) { | |
2293 | ddns_dual_stack_mixed_mode = | |
2294 | evaluate_boolean_option_cache(NULL, NULL, NULL, NULL, options, | |
2295 | NULL, &global_scope, oc, MDL); | |
2296 | } | |
2297 | ||
2298 | oc = lookup_option(&server_universe, options, | |
2299 | SV_DDNS_GUARD_ID_MUST_MATCH); | |
2300 | if (oc) { | |
2301 | ddns_guard_id_must_match = | |
2302 | evaluate_boolean_option_cache(NULL, NULL, NULL, NULL, options, | |
2303 | NULL, &global_scope, oc, MDL); | |
2304 | } | |
2305 | ||
2306 | oc = lookup_option(&server_universe, options, | |
2307 | SV_DDNS_OTHER_GUARD_IS_DYNAMIC); | |
2308 | if (oc) { | |
2309 | ddns_other_guard_is_dynamic = | |
2310 | evaluate_boolean_option_cache(NULL, NULL, NULL, NULL, options, | |
2311 | NULL, &global_scope, oc, MDL); | |
2312 | } | |
2313 | ||
2314 | // Set the flags | |
2315 | set_flag(&mask, DDNS_DUAL_STACK_MIXED_MODE, | |
2316 | ddns_dual_stack_mixed_mode); | |
2317 | ||
2318 | set_flag(&mask, DDNS_GUARD_ID_MUST_MATCH, | |
2319 | ddns_guard_id_must_match); | |
2320 | ||
2321 | set_flag(&mask, DDNS_OTHER_GUARD_IS_DYNAMIC, | |
2322 | ddns_other_guard_is_dynamic); | |
2323 | ||
2324 | #if defined (DEBUG_DNS_UPDATES) | |
2325 | log_info ("DDNS conflict behavior:\n" | |
2326 | "\tddns-update-style: %s\n" | |
2327 | "\tupdate-conflict-detection: %d\n" | |
2328 | "\tddns-dual-stack-mixed-mode: %d\n" | |
2329 | "\tddns-guard-id-must-match %d\n" | |
2330 | "\tddns-other-guard-is-dynamic: %d\n", | |
2331 | ddns_styles_values[ddns_update_style].name, | |
2332 | ddns_update_conflict_detection, | |
2333 | ddns_dual_stack_mixed_mode, | |
2334 | ddns_guard_id_must_match, | |
2335 | ddns_other_guard_is_dynamic); | |
2336 | #endif | |
2337 | return (mask); | |
2338 | } | |
2339 | ||
2340 | #if defined (DEBUG_DNS_UPDATES) | |
2341 | /* Type used for creating lists of function pointers and their names */ | |
2342 | typedef struct { | |
2343 | void *ptr; | |
2344 | char *name; | |
2345 | } LabeledPtr; | |
2346 | ||
2347 | /* Returns the name of the function referred to by the given address */ | |
2348 | char* | |
2349 | dump_ddns_cb_func(void *func) { | |
2350 | static LabeledPtr funcs[] = { | |
2351 | { ddns_ptr_add, "ddns_ptr_add" }, | |
2352 | { ddns_fwd_srv_add2, "ddns_fwd_srv_add2" }, | |
2353 | { ddns_fwd_srv_add1, "ddns_fwd_srv_add1" }, | |
2354 | { ddns_ptr_remove, "ddns_ptr_remove" }, | |
2355 | { ddns_fwd_srv_rem2, "ddns_fwd_srv_rem2" }, | |
2356 | { ddns_fwd_srv_rem1, "ddns_fwd_srv_rem1" }, | |
2357 | { ddns_fwd_srv_add3, "ddns_fwd_srv_adde" }, | |
2358 | { NULL, "unknown" } | |
2359 | }; | |
2360 | ||
2361 | LabeledPtr* lp = funcs; | |
2362 | if (!func) { | |
2363 | return ("<null>"); | |
2364 | } | |
2365 | ||
2366 | while ((lp->ptr) && (lp->ptr != func)) { | |
2367 | ++lp; | |
2368 | } | |
2369 | ||
2370 | return (lp->name); | |
2371 | } | |
2372 | ||
2373 | /* Dumps basic control block info to the log */ | |
2374 | char* | |
2375 | dump_ddns_cb (dhcp_ddns_cb_t *ddns_cb) { | |
2376 | static char output_buf[4096]; | |
2377 | if (!ddns_cb) { | |
2378 | return ("<ddns_cb is null>"); | |
2379 | } | |
2380 | ||
2381 | sprintf (output_buf, "ddns_cb: %p flags: %x state: %s cur_func: %s", | |
2382 | ddns_cb, ddns_cb->flags, | |
2383 | ddns_state_name(ddns_cb->state), | |
2384 | dump_ddns_cb_func(ddns_cb->cur_func)); | |
2385 | ||
2386 | return(output_buf); | |
2387 | } | |
2388 | #endif /* DEBUG_DNS_UPDATES */ | |
2389 | ||
b992d7e2 | 2390 | #endif /* NSUPDATE */ |