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Commit | Line | Data |
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b992d7e2 DN |
1 | /* ddns.c |
2 | ||
3 | Dynamic DNS updates. */ | |
4 | ||
5 | /* | |
2b58b865 | 6 | * |
a7341359 | 7 | * Copyright (c) 2009-2013 by Internet Systems Consortium, Inc. ("ISC") |
2b58b865 | 8 | * Copyright (c) 2004-2007 by Internet Systems Consortium, Inc. ("ISC") |
98311e4b | 9 | * Copyright (c) 2000-2003 by Internet Software Consortium |
b992d7e2 | 10 | * |
98311e4b DH |
11 | * Permission to use, copy, modify, and distribute this software for any |
12 | * purpose with or without fee is hereby granted, provided that the above | |
13 | * copyright notice and this permission notice appear in all copies. | |
b992d7e2 | 14 | * |
98311e4b DH |
15 | * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES |
16 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
17 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR | |
18 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
19 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
20 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT | |
21 | * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
b992d7e2 | 22 | * |
98311e4b DH |
23 | * Internet Systems Consortium, Inc. |
24 | * 950 Charter Street | |
25 | * Redwood City, CA 94063 | |
26 | * <info@isc.org> | |
2c85ac9b | 27 | * https://www.isc.org/ |
b992d7e2 | 28 | * |
98311e4b | 29 | * This software has been donated to Internet Systems Consortium |
0598e123 TL |
30 | * by Damien Neil of Nominum, Inc. |
31 | * | |
98311e4b | 32 | * To learn more about Internet Systems Consortium, see |
2c85ac9b | 33 | * ``https://www.isc.org/''. To learn more about Nominum, Inc., see |
b992d7e2 DN |
34 | * ``http://www.nominum.com''. |
35 | */ | |
36 | ||
b992d7e2 | 37 | #include "dhcpd.h" |
37ee426a | 38 | #include "dst/md5.h" |
98bf1607 | 39 | #include <dns/result.h> |
b992d7e2 DN |
40 | |
41 | #ifdef NSUPDATE | |
42 | ||
98bf1607 SR |
43 | static void ddns_fwd_srv_connector(struct lease *lease, |
44 | struct iasubopt *lease6, | |
45 | struct binding_scope **inscope, | |
46 | dhcp_ddns_cb_t *ddns_cb, | |
47 | isc_result_t eresult); | |
48 | ||
0598e123 TL |
49 | /* DN: No way of checking that there is enough space in a data_string's |
50 | buffer. Be certain to allocate enough! | |
385fcb27 | 51 | TL: This is why the expression evaluation code allocates a *new* |
0598e123 | 52 | data_string. :') */ |
b992d7e2 DN |
53 | static void data_string_append (struct data_string *ds1, |
54 | struct data_string *ds2) | |
55 | { | |
56 | memcpy (ds1 -> buffer -> data + ds1 -> len, | |
57 | ds2 -> data, | |
58 | ds2 -> len); | |
59 | ds1 -> len += ds2 -> len; | |
60 | } | |
61 | ||
b992d7e2 | 62 | |
98bd7ca0 DH |
63 | /* Determine what, if any, forward and reverse updates need to be |
64 | * performed, and carry them through. | |
65 | */ | |
66 | int | |
67 | ddns_updates(struct packet *packet, struct lease *lease, struct lease *old, | |
1d17db44 | 68 | struct iasubopt *lease6, struct iasubopt *old6, |
98bd7ca0 | 69 | struct option_state *options) |
b992d7e2 DN |
70 | { |
71 | unsigned long ddns_ttl = DEFAULT_DDNS_TTL; | |
72 | struct data_string ddns_hostname; | |
73 | struct data_string ddns_domainname; | |
478028e7 | 74 | struct data_string old_ddns_fwd_name; |
b992d7e2 | 75 | struct data_string ddns_fwd_name; |
98bf1607 | 76 | //struct data_string ddns_rev_name; |
b992d7e2 | 77 | struct data_string ddns_dhcid; |
98bf1607 SR |
78 | struct binding_scope **scope = NULL; |
79 | //struct iaddr addr; | |
b992d7e2 DN |
80 | struct data_string d1; |
81 | struct option_cache *oc; | |
82 | int s1, s2; | |
83 | int result = 0; | |
478028e7 | 84 | int server_updates_a = 1; |
98bf1607 | 85 | //int server_updates_ptr = 1; |
478028e7 | 86 | struct buffer *bp = (struct buffer *)0; |
a396d25f | 87 | int ignorep = 0, client_ignorep = 0; |
98bd7ca0 DH |
88 | int rev_name_len; |
89 | int i; | |
b992d7e2 | 90 | |
98bf1607 SR |
91 | dhcp_ddns_cb_t *ddns_cb; |
92 | int do_remove = 0; | |
93 | ||
5fac73d6 TL |
94 | if (ddns_update_style != 2) |
95 | return 0; | |
96 | ||
98bf1607 SR |
97 | /* |
98 | * sigh, I want to cancel any previous udpates before we do anything | |
99 | * else but this means we need to deal with the lease vs lease6 | |
100 | * question twice. | |
101 | * If there is a ddns request already outstanding cancel it. | |
102 | */ | |
103 | ||
98bd7ca0 | 104 | if (lease != NULL) { |
98bf1607 | 105 | if ((old != NULL) && (old->ddns_cb != NULL)) { |
87132514 | 106 | ddns_cancel(old->ddns_cb, MDL); |
98bf1607 SR |
107 | old->ddns_cb = NULL; |
108 | } | |
98bd7ca0 | 109 | } else if (lease6 != NULL) { |
98bf1607 | 110 | if ((old6 != NULL) && (old6->ddns_cb != NULL)) { |
87132514 | 111 | ddns_cancel(old6->ddns_cb, MDL); |
98bf1607 SR |
112 | old6->ddns_cb = NULL; |
113 | } | |
6705543f | 114 | } else { |
98bd7ca0 | 115 | log_fatal("Impossible condition at %s:%d.", MDL); |
6705543f | 116 | /* Silence compiler warnings. */ |
98bf1607 SR |
117 | result = 0; |
118 | return(0); | |
119 | } | |
120 | ||
121 | /* allocate our control block */ | |
122 | ddns_cb = ddns_cb_alloc(MDL); | |
123 | if (ddns_cb == NULL) { | |
124 | return(0); | |
125 | } | |
0ef9a46e SR |
126 | /* |
127 | * Assume that we shall update both the A and ptr records and, | |
128 | * as this is an update, set the active flag | |
129 | */ | |
130 | ddns_cb->flags = DDNS_UPDATE_ADDR | DDNS_UPDATE_PTR | | |
131 | DDNS_ACTIVE_LEASE; | |
3221151b SR |
132 | |
133 | /* | |
134 | * For v4 we flag static leases so we don't try | |
135 | * and manipulate the lease later. For v6 we don't | |
136 | * get static leases and don't need to flag them. | |
137 | */ | |
98bf1607 SR |
138 | if (lease != NULL) { |
139 | scope = &(lease->scope); | |
140 | ddns_cb->address = lease->ip_addr; | |
3221151b SR |
141 | if (lease->flags & STATIC_LEASE) |
142 | ddns_cb->flags |= DDNS_STATIC_LEASE; | |
98bf1607 SR |
143 | } else if (lease6 != NULL) { |
144 | scope = &(lease6->scope); | |
145 | memcpy(ddns_cb->address.iabuf, lease6->addr.s6_addr, 16); | |
146 | ddns_cb->address.len = 16; | |
6705543f | 147 | } |
b992d7e2 | 148 | |
98bf1607 | 149 | memset (&d1, 0, sizeof(d1)); |
b992d7e2 DN |
150 | memset (&ddns_hostname, 0, sizeof (ddns_hostname)); |
151 | memset (&ddns_domainname, 0, sizeof (ddns_domainname)); | |
478028e7 | 152 | memset (&old_ddns_fwd_name, 0, sizeof (ddns_fwd_name)); |
b992d7e2 | 153 | memset (&ddns_fwd_name, 0, sizeof (ddns_fwd_name)); |
98bf1607 | 154 | //memset (&ddns_rev_name, 0, sizeof (ddns_rev_name)); |
b992d7e2 DN |
155 | memset (&ddns_dhcid, 0, sizeof (ddns_dhcid)); |
156 | ||
478028e7 TL |
157 | /* If we are allowed to accept the client's update of its own A |
158 | record, see if the client wants to update its own A record. */ | |
98bd7ca0 | 159 | if (!(oc = lookup_option(&server_universe, options, |
a396d25f DH |
160 | SV_CLIENT_UPDATES)) || |
161 | evaluate_boolean_option_cache(&client_ignorep, packet, lease, NULL, | |
98bd7ca0 DH |
162 | packet->options, options, scope, |
163 | oc, MDL)) { | |
478028e7 TL |
164 | /* If there's no fqdn.no-client-update or if it's |
165 | nonzero, don't try to use the client-supplied | |
166 | XXX */ | |
ee83afae | 167 | if (!(oc = lookup_option (&fqdn_universe, packet -> options, |
98311e4b | 168 | FQDN_SERVER_UPDATE)) || |
98bd7ca0 DH |
169 | evaluate_boolean_option_cache(&ignorep, packet, lease, |
170 | NULL, packet->options, | |
171 | options, scope, oc, MDL)) | |
478028e7 | 172 | goto noclient; |
e9d45f83 TL |
173 | /* Win98 and Win2k will happily claim to be willing to |
174 | update an unqualified domain name. */ | |
175 | if (!(oc = lookup_option (&fqdn_universe, packet -> options, | |
176 | FQDN_DOMAINNAME))) | |
177 | goto noclient; | |
ee83afae | 178 | if (!(oc = lookup_option (&fqdn_universe, packet -> options, |
478028e7 | 179 | FQDN_FQDN)) || |
98bd7ca0 DH |
180 | !evaluate_option_cache(&ddns_fwd_name, packet, lease, |
181 | NULL, packet->options, | |
182 | options, scope, oc, MDL)) | |
478028e7 | 183 | goto noclient; |
98bf1607 | 184 | ddns_cb->flags &= ~DDNS_UPDATE_ADDR; |
478028e7 TL |
185 | server_updates_a = 0; |
186 | goto client_updates; | |
b992d7e2 | 187 | } |
478028e7 | 188 | noclient: |
98311e4b DH |
189 | /* If do-forward-updates is disabled, this basically means don't |
190 | do an update unless the client is participating, so if we get | |
191 | here and do-forward-updates is disabled, we can stop. */ | |
98bd7ca0 | 192 | if ((oc = lookup_option (&server_universe, options, |
98311e4b | 193 | SV_DO_FORWARD_UPDATES)) && |
98bd7ca0 DH |
194 | !evaluate_boolean_option_cache(&ignorep, packet, lease, |
195 | NULL, packet->options, | |
196 | options, scope, oc, MDL)) { | |
98bf1607 | 197 | goto out; |
98311e4b | 198 | } |
b992d7e2 | 199 | |
ec64b462 TL |
200 | /* If it's a static lease, then don't do the DNS update unless we're |
201 | specifically configured to do so. If the client asked to do its | |
202 | own update and we allowed that, we don't do this test. */ | |
98bd7ca0 DH |
203 | /* XXX: note that we cannot detect static DHCPv6 leases. */ |
204 | if ((lease != NULL) && (lease->flags & STATIC_LEASE)) { | |
205 | if (!(oc = lookup_option(&server_universe, options, | |
206 | SV_UPDATE_STATIC_LEASES)) || | |
207 | !evaluate_boolean_option_cache(&ignorep, packet, lease, | |
208 | NULL, packet->options, | |
209 | options, scope, oc, MDL)) | |
98bf1607 | 210 | goto out; |
ec64b462 TL |
211 | } |
212 | ||
b992d7e2 | 213 | /* |
478028e7 | 214 | * Compute the name for the A record. |
b992d7e2 | 215 | */ |
98bd7ca0 | 216 | oc = lookup_option(&server_universe, options, SV_DDNS_HOST_NAME); |
b992d7e2 | 217 | if (oc) |
98bd7ca0 DH |
218 | s1 = evaluate_option_cache(&ddns_hostname, packet, lease, |
219 | NULL, packet->options, | |
220 | options, scope, oc, MDL); | |
98311e4b DH |
221 | else |
222 | s1 = 0; | |
b992d7e2 | 223 | |
98bd7ca0 | 224 | oc = lookup_option(&server_universe, options, SV_DDNS_DOMAIN_NAME); |
b992d7e2 | 225 | if (oc) |
98bd7ca0 DH |
226 | s2 = evaluate_option_cache(&ddns_domainname, packet, lease, |
227 | NULL, packet->options, | |
228 | options, scope, oc, MDL); | |
98311e4b DH |
229 | else |
230 | s2 = 0; | |
b992d7e2 DN |
231 | |
232 | if (s1 && s2) { | |
98311e4b DH |
233 | if (ddns_hostname.len + ddns_domainname.len > 253) { |
234 | log_error ("ddns_update: host.domain name too long"); | |
235 | ||
236 | goto out; | |
237 | } | |
238 | ||
b992d7e2 DN |
239 | buffer_allocate (&ddns_fwd_name.buffer, |
240 | ddns_hostname.len + ddns_domainname.len + 2, | |
241 | MDL); | |
242 | if (ddns_fwd_name.buffer) { | |
98bf1607 | 243 | ddns_fwd_name.data = ddns_fwd_name.buffer->data; |
b992d7e2 | 244 | data_string_append (&ddns_fwd_name, &ddns_hostname); |
98bf1607 | 245 | ddns_fwd_name.buffer->data[ddns_fwd_name.len] = '.'; |
b992d7e2 DN |
246 | ddns_fwd_name.len++; |
247 | data_string_append (&ddns_fwd_name, &ddns_domainname); | |
98bf1607 | 248 | ddns_fwd_name.buffer->data[ddns_fwd_name.len] ='\0'; |
b992d7e2 DN |
249 | ddns_fwd_name.terminated = 1; |
250 | } | |
251 | } | |
478028e7 TL |
252 | client_updates: |
253 | ||
254 | /* See if there's a name already stored on the lease. */ | |
98bd7ca0 | 255 | if (find_bound_string(&old_ddns_fwd_name, *scope, "ddns-fwd-name")) { |
478028e7 TL |
256 | /* If there is, see if it's different. */ |
257 | if (old_ddns_fwd_name.len != ddns_fwd_name.len || | |
258 | memcmp (old_ddns_fwd_name.data, ddns_fwd_name.data, | |
259 | old_ddns_fwd_name.len)) { | |
98bf1607 SR |
260 | /* |
261 | * If the name is different, mark the old record | |
262 | * for deletion and continue getting the new info. | |
263 | */ | |
264 | do_remove = 1; | |
478028e7 TL |
265 | goto in; |
266 | } | |
267 | ||
98bd7ca0 DH |
268 | /* See if there's a DHCID on the lease, and if not |
269 | * then potentially look for 'on events' for ad-hoc ddns. | |
270 | */ | |
271 | if (!find_bound_string(&ddns_dhcid, *scope, "ddns-txt") && | |
272 | (old != NULL)) { | |
478028e7 TL |
273 | /* If there's no DHCID, the update was probably |
274 | done with the old-style ad-hoc DDNS updates. | |
275 | So if the expiry and release events look like | |
276 | they're the same, run them. This should delete | |
277 | the old DDNS data. */ | |
a7341359 SR |
278 | if (old->on_star.on_expiry == |
279 | old->on_star.on_release) { | |
98bd7ca0 DH |
280 | execute_statements(NULL, NULL, lease, NULL, |
281 | NULL, NULL, scope, | |
a7341359 SR |
282 | old->on_star.on_expiry, |
283 | NULL); | |
284 | if (old->on_star.on_expiry) | |
478028e7 | 285 | executable_statement_dereference |
a7341359 SR |
286 | (&old->on_star.on_expiry, |
287 | MDL); | |
288 | if (old->on_star.on_release) | |
478028e7 | 289 | executable_statement_dereference |
a7341359 SR |
290 | (&old->on_star.on_release, |
291 | MDL); | |
478028e7 TL |
292 | /* Now, install the DDNS data the new way. */ |
293 | goto in; | |
294 | } | |
75ab3070 DH |
295 | } else |
296 | data_string_forget(&ddns_dhcid, MDL); | |
478028e7 | 297 | |
ebd0310b TL |
298 | /* See if the administrator wants to do updates even |
299 | in cases where the update already appears to have been | |
300 | done. */ | |
98bd7ca0 DH |
301 | if (!(oc = lookup_option(&server_universe, options, |
302 | SV_UPDATE_OPTIMIZATION)) || | |
303 | evaluate_boolean_option_cache(&ignorep, packet, lease, | |
304 | NULL, packet->options, | |
305 | options, scope, oc, MDL)) { | |
ebd0310b TL |
306 | result = 1; |
307 | goto noerror; | |
308 | } | |
75ab3070 DH |
309 | /* If there's no "ddns-fwd-name" on the lease record, see if |
310 | * there's a ddns-client-fqdn indicating a previous client | |
311 | * update (if it changes, we need to adjust the PTR). | |
312 | */ | |
98bd7ca0 | 313 | } else if (find_bound_string(&old_ddns_fwd_name, *scope, |
75ab3070 | 314 | "ddns-client-fqdn")) { |
98311e4b DH |
315 | /* If the name is not different, no need to update |
316 | the PTR record. */ | |
ee83afae TL |
317 | if (old_ddns_fwd_name.len == ddns_fwd_name.len && |
318 | !memcmp (old_ddns_fwd_name.data, ddns_fwd_name.data, | |
98311e4b | 319 | old_ddns_fwd_name.len) && |
98bd7ca0 DH |
320 | (!(oc = lookup_option(&server_universe, options, |
321 | SV_UPDATE_OPTIMIZATION)) || | |
322 | evaluate_boolean_option_cache(&ignorep, packet, lease, | |
323 | NULL, packet->options, | |
324 | options, scope, oc, MDL))) { | |
478028e7 TL |
325 | goto noerror; |
326 | } | |
327 | } | |
328 | in: | |
329 | ||
d758ad8c TL |
330 | /* If we don't have a name that the client has been assigned, we |
331 | can just skip all this. */ | |
d758ad8c | 332 | |
98bf1607 SR |
333 | if ((!ddns_fwd_name.len) || (ddns_fwd_name.len > 255)) { |
334 | if (ddns_fwd_name.len > 255) { | |
335 | log_error ("client provided fqdn: too long"); | |
336 | } | |
337 | ||
338 | /* If desired do the removals */ | |
339 | if (do_remove != 0) { | |
0ef9a46e | 340 | (void) ddns_removals(lease, lease6, NULL, ISC_TRUE); |
98bf1607 | 341 | } |
98311e4b DH |
342 | goto out; |
343 | } | |
344 | ||
b992d7e2 | 345 | /* |
478028e7 | 346 | * Compute the RR TTL. |
2b58b865 SR |
347 | * |
348 | * We have two ways of computing the TTL. | |
349 | * The old behavior was to allow for the customer to set up | |
350 | * the option or to default things. For v4 this was 1/2 | |
351 | * of the lease time, for v6 this was DEFAULT_DDNS_TTL. | |
352 | * The new behavior continues to allow the customer to set | |
353 | * up an option but the defaults are a little different. | |
354 | * We now use 1/2 of the (preferred) lease time for both | |
355 | * v4 and v6 and cap them at a maximum value. | |
356 | * If the customer chooses to use an experession that references | |
357 | * part of the lease the v6 value will be the default as there | |
358 | * isn't a lease available for v6. | |
478028e7 | 359 | */ |
2b58b865 | 360 | |
478028e7 | 361 | ddns_ttl = DEFAULT_DDNS_TTL; |
2b58b865 SR |
362 | if (lease != NULL) { |
363 | if (lease->ends <= cur_time) { | |
364 | ddns_ttl = 0; | |
365 | } else { | |
366 | ddns_ttl = (lease->ends - cur_time)/2; | |
367 | } | |
368 | } | |
369 | #ifndef USE_OLD_DDNS_TTL | |
370 | else if (lease6 != NULL) { | |
371 | ddns_ttl = lease6->prefer/2; | |
372 | } | |
373 | ||
374 | if (ddns_ttl > MAX_DEFAULT_DDNS_TTL) { | |
375 | ddns_ttl = MAX_DEFAULT_DDNS_TTL; | |
376 | } | |
377 | #endif | |
378 | ||
98bd7ca0 DH |
379 | if ((oc = lookup_option(&server_universe, options, SV_DDNS_TTL))) { |
380 | if (evaluate_option_cache(&d1, packet, lease, NULL, | |
2b58b865 SR |
381 | packet->options, options, |
382 | scope, oc, MDL)) { | |
478028e7 | 383 | if (d1.len == sizeof (u_int32_t)) |
2b58b865 | 384 | ddns_ttl = getULong (d1.data); |
478028e7 TL |
385 | data_string_forget (&d1, MDL); |
386 | } | |
387 | } | |
388 | ||
2b58b865 SR |
389 | ddns_cb->ttl = ddns_ttl; |
390 | ||
478028e7 | 391 | /* |
61d75ea2 | 392 | * Compute the reverse IP name, starting with the domain name. |
b992d7e2 | 393 | */ |
61d75ea2 DH |
394 | oc = lookup_option(&server_universe, options, SV_DDNS_REV_DOMAIN_NAME); |
395 | if (oc) | |
396 | s1 = evaluate_option_cache(&d1, packet, lease, NULL, | |
397 | packet->options, options, | |
398 | scope, oc, MDL); | |
399 | else | |
400 | s1 = 0; | |
98bd7ca0 DH |
401 | |
402 | /* | |
403 | * Figure out the length of the part of the name that depends | |
404 | * on the address. | |
405 | */ | |
98bf1607 | 406 | if (ddns_cb->address.len == 4) { |
61d75ea2 | 407 | char buf[17]; |
98bd7ca0 DH |
408 | /* XXX: WOW this is gross. */ |
409 | rev_name_len = snprintf(buf, sizeof(buf), "%u.%u.%u.%u.", | |
98bf1607 SR |
410 | ddns_cb->address.iabuf[3] & 0xff, |
411 | ddns_cb->address.iabuf[2] & 0xff, | |
412 | ddns_cb->address.iabuf[1] & 0xff, | |
413 | ddns_cb->address.iabuf[0] & 0xff) + 1; | |
61d75ea2 DH |
414 | |
415 | if (s1) { | |
416 | rev_name_len += d1.len; | |
417 | ||
418 | if (rev_name_len > 255) { | |
419 | log_error("ddns_update: Calculated rev domain " | |
420 | "name too long."); | |
421 | s1 = 0; | |
422 | data_string_forget(&d1, MDL); | |
423 | } | |
424 | } | |
98bf1607 | 425 | } else if (ddns_cb->address.len == 16) { |
98bd7ca0 DH |
426 | /* |
427 | * IPv6 reverse names are always the same length, with | |
428 | * 32 hex characters separated by dots. | |
429 | */ | |
61d75ea2 DH |
430 | rev_name_len = sizeof("0.1.2.3.4.5.6.7." |
431 | "8.9.a.b.c.d.e.f." | |
432 | "0.1.2.3.4.5.6.7." | |
433 | "8.9.a.b.c.d.e.f." | |
434 | "ip6.arpa."); | |
435 | ||
436 | /* Set s1 to make sure we gate into updates. */ | |
437 | s1 = 1; | |
6705543f | 438 | } else { |
98bf1607 | 439 | log_fatal("invalid address length %d", ddns_cb->address.len); |
6705543f DH |
440 | /* Silence compiler warnings. */ |
441 | return 0; | |
442 | } | |
98bd7ca0 | 443 | |
61d75ea2 DH |
444 | /* See if we are configured NOT to do reverse ptr updates */ |
445 | if ((oc = lookup_option(&server_universe, options, | |
446 | SV_DO_REVERSE_UPDATES)) && | |
447 | !evaluate_boolean_option_cache(&ignorep, packet, lease, NULL, | |
98bd7ca0 | 448 | packet->options, options, |
61d75ea2 | 449 | scope, oc, MDL)) { |
98bf1607 | 450 | ddns_cb->flags &= ~DDNS_UPDATE_PTR; |
98311e4b DH |
451 | } |
452 | ||
61d75ea2 | 453 | if (s1) { |
98bf1607 SR |
454 | buffer_allocate(&ddns_cb->rev_name.buffer, rev_name_len, MDL); |
455 | if (ddns_cb->rev_name.buffer != NULL) { | |
456 | struct data_string *rname = &ddns_cb->rev_name; | |
457 | rname->data = rname->buffer->data; | |
458 | ||
459 | if (ddns_cb->address.len == 4) { | |
460 | rname->len = | |
461 | sprintf((char *)rname->buffer->data, | |
61d75ea2 | 462 | "%u.%u.%u.%u.", |
98bf1607 SR |
463 | ddns_cb->address.iabuf[3] & 0xff, |
464 | ddns_cb->address.iabuf[2] & 0xff, | |
465 | ddns_cb->address.iabuf[1] & 0xff, | |
466 | ddns_cb->address.iabuf[0] & 0xff); | |
61d75ea2 DH |
467 | |
468 | /* | |
469 | * d1.data may be opaque, garbage bytes, from | |
470 | * user (mis)configuration. | |
471 | */ | |
98bf1607 SR |
472 | data_string_append(rname, &d1); |
473 | rname->buffer->data[rname->len] = '\0'; | |
474 | } else if (ddns_cb->address.len == 16) { | |
475 | char *p = (char *)&rname->buffer->data; | |
476 | unsigned char *a = ddns_cb->address.iabuf + 15; | |
98bd7ca0 DH |
477 | for (i=0; i<16; i++) { |
478 | sprintf(p, "%x.%x.", | |
479 | (*a & 0xF), ((*a >> 4) & 0xF)); | |
480 | p += 4; | |
481 | a -= 1; | |
482 | } | |
61d75ea2 | 483 | strcat(p, "ip6.arpa."); |
98bf1607 | 484 | rname->len = strlen((const char *)rname->data); |
98bd7ca0 | 485 | } |
98311e4b | 486 | |
98bf1607 | 487 | rname->terminated = 1; |
b992d7e2 | 488 | } |
98bd7ca0 | 489 | |
61d75ea2 DH |
490 | if (d1.data != NULL) |
491 | data_string_forget(&d1, MDL); | |
b992d7e2 DN |
492 | } |
493 | ||
b992d7e2 | 494 | /* |
478028e7 | 495 | * If we are updating the A record, compute the DHCID value. |
b992d7e2 | 496 | */ |
98bf1607 | 497 | if ((ddns_cb->flags & DDNS_UPDATE_ADDR) != 0) { |
98bd7ca0 | 498 | if (lease6 != NULL) |
98bf1607 | 499 | result = get_dhcid(&ddns_cb->dhcid, 2, |
9322442f FD |
500 | lease6->ia->iaid_duid.data, |
501 | lease6->ia->iaid_duid.len); | |
98bd7ca0 DH |
502 | else if ((lease != NULL) && (lease->uid != NULL) && |
503 | (lease->uid_len != 0)) | |
98bf1607 | 504 | result = get_dhcid (&ddns_cb->dhcid, |
d758ad8c TL |
505 | DHO_DHCP_CLIENT_IDENTIFIER, |
506 | lease -> uid, lease -> uid_len); | |
98bd7ca0 | 507 | else if (lease != NULL) |
98bf1607 | 508 | result = get_dhcid (&ddns_cb->dhcid, 0, |
d758ad8c TL |
509 | lease -> hardware_addr.hbuf, |
510 | lease -> hardware_addr.hlen); | |
98bd7ca0 DH |
511 | else |
512 | log_fatal("Impossible condition at %s:%d.", MDL); | |
513 | ||
d758ad8c TL |
514 | if (!result) |
515 | goto badfqdn; | |
478028e7 | 516 | } |
b992d7e2 | 517 | |
b992d7e2 DN |
518 | /* |
519 | * Perform updates. | |
520 | */ | |
3004bebf | 521 | |
98bf1607 SR |
522 | data_string_copy(&ddns_cb->fwd_name, &ddns_fwd_name, MDL); |
523 | ||
524 | if (ddns_cb->flags && DDNS_UPDATE_ADDR) { | |
98bd7ca0 | 525 | oc = lookup_option(&server_universe, options, |
3004bebf | 526 | SV_DDNS_CONFLICT_DETECT); |
98bf1607 SR |
527 | if (oc && |
528 | !evaluate_boolean_option_cache(&ignorep, packet, lease, | |
529 | NULL, packet->options, | |
530 | options, scope, oc, MDL)) | |
531 | ddns_cb->flags |= DDNS_CONFLICT_OVERRIDE; | |
3004bebf | 532 | |
3004bebf | 533 | } |
75ab3070 | 534 | |
98bf1607 SR |
535 | /* |
536 | * Previously if we failed during the removal operations | |
537 | * we skipped the fqdn option processing. I'm not sure | |
538 | * if we want to continue with that if we fail before sending | |
539 | * the ddns messages. Currently we don't. | |
540 | */ | |
541 | if (do_remove) { | |
dd9237c3 TM |
542 | /* |
543 | * We should log a more specific error closer to the actual | |
544 | * error if we want one. ddns_removal failure not logged here. | |
545 | */ | |
546 | (void) ddns_removals(lease, lease6, ddns_cb, ISC_TRUE); | |
b992d7e2 | 547 | } |
98bf1607 SR |
548 | else { |
549 | ddns_fwd_srv_connector(lease, lease6, scope, ddns_cb, | |
550 | ISC_R_SUCCESS); | |
b992d7e2 | 551 | } |
98bf1607 | 552 | ddns_cb = NULL; |
b992d7e2 | 553 | |
478028e7 | 554 | noerror: |
1ba87b37 EH |
555 | /* |
556 | * If fqdn-reply option is disabled in dhcpd.conf, then don't | |
557 | * send the client an FQDN option at all, even if one was requested. | |
558 | * (WinXP clients allegedly misbehave if the option is present, | |
559 | * refusing to handle PTR updates themselves). | |
560 | */ | |
98bd7ca0 DH |
561 | if ((oc = lookup_option (&server_universe, options, SV_FQDN_REPLY)) && |
562 | !evaluate_boolean_option_cache(&ignorep, packet, lease, NULL, | |
563 | packet->options, options, | |
564 | scope, oc, MDL)) { | |
1ba87b37 EH |
565 | goto badfqdn; |
566 | ||
a396d25f DH |
567 | /* If we're ignoring client updates, then we tell a sort of 'white |
568 | * lie'. We've already updated the name the server wants (per the | |
569 | * config written by the server admin). Now let the client do as | |
570 | * it pleases with the name they supplied (if any). | |
571 | * | |
572 | * We only form an FQDN option this way if the client supplied an | |
573 | * FQDN option that had FQDN_SERVER_UPDATE set false. | |
574 | */ | |
1ba87b37 | 575 | } else if (client_ignorep && |
a396d25f DH |
576 | (oc = lookup_option(&fqdn_universe, packet->options, |
577 | FQDN_SERVER_UPDATE)) && | |
578 | !evaluate_boolean_option_cache(&ignorep, packet, lease, NULL, | |
98bd7ca0 DH |
579 | packet->options, options, |
580 | scope, oc, MDL)) { | |
a396d25f DH |
581 | oc = lookup_option(&fqdn_universe, packet->options, FQDN_FQDN); |
582 | if (oc && evaluate_option_cache(&d1, packet, lease, NULL, | |
98bd7ca0 DH |
583 | packet->options, options, |
584 | scope, oc, MDL)) { | |
a396d25f DH |
585 | if (d1.len == 0 || |
586 | !buffer_allocate(&bp, d1.len + 5, MDL)) | |
587 | goto badfqdn; | |
588 | ||
589 | /* Server pretends it is not updating. */ | |
590 | bp->data[0] = 0; | |
98bd7ca0 | 591 | if (!save_option_buffer(&fqdn_universe, options, |
a396d25f | 592 | bp, &bp->data[0], 1, |
8f4c32a1 | 593 | FQDN_SERVER_UPDATE, 0)) |
a396d25f DH |
594 | goto badfqdn; |
595 | ||
596 | /* Client is encouraged to update. */ | |
597 | bp->data[1] = 0; | |
98bd7ca0 | 598 | if (!save_option_buffer(&fqdn_universe, options, |
a396d25f | 599 | bp, &bp->data[1], 1, |
8f4c32a1 | 600 | FQDN_NO_CLIENT_UPDATE, 0)) |
a396d25f DH |
601 | goto badfqdn; |
602 | ||
603 | /* Use the encoding of client's FQDN option. */ | |
604 | oc = lookup_option(&fqdn_universe, packet->options, | |
605 | FQDN_ENCODED); | |
98bd7ca0 DH |
606 | if (oc && |
607 | evaluate_boolean_option_cache(&ignorep, packet, | |
608 | lease, NULL, | |
609 | packet->options, | |
610 | options, scope, | |
611 | oc, MDL)) | |
a396d25f DH |
612 | bp->data[2] = 1; /* FQDN is encoded. */ |
613 | else | |
614 | bp->data[2] = 0; /* FQDN is not encoded. */ | |
615 | ||
98bd7ca0 | 616 | if (!save_option_buffer(&fqdn_universe, options, |
a396d25f | 617 | bp, &bp->data[2], 1, |
8f4c32a1 | 618 | FQDN_ENCODED, 0)) |
a396d25f DH |
619 | goto badfqdn; |
620 | ||
621 | /* Current FQDN drafts indicate 255 is mandatory. */ | |
622 | bp->data[3] = 255; | |
98bd7ca0 | 623 | if (!save_option_buffer(&fqdn_universe, options, |
a396d25f | 624 | bp, &bp->data[3], 1, |
8f4c32a1 | 625 | FQDN_RCODE1, 0)) |
a396d25f DH |
626 | goto badfqdn; |
627 | ||
628 | bp->data[4] = 255; | |
98bd7ca0 | 629 | if (!save_option_buffer(&fqdn_universe, options, |
a396d25f | 630 | bp, &bp->data[4], 1, |
8f4c32a1 | 631 | FQDN_RCODE2, 0)) |
a396d25f DH |
632 | goto badfqdn; |
633 | ||
634 | /* Copy in the FQDN supplied by the client. Note well | |
635 | * that the format of this option in the cache is going | |
636 | * to be in text format. If the fqdn supplied by the | |
637 | * client is encoded, it is decoded into the option | |
638 | * cache when parsed out of the packet. It will be | |
639 | * re-encoded when the option is assembled to be | |
640 | * transmitted if the client elects that encoding. | |
641 | */ | |
642 | memcpy(&bp->data[5], d1.data, d1.len); | |
98bd7ca0 | 643 | if (!save_option_buffer(&fqdn_universe, options, |
928618dd | 644 | bp, &bp->data[5], d1.len, |
8f4c32a1 | 645 | FQDN_FQDN, 0)) |
a396d25f DH |
646 | goto badfqdn; |
647 | ||
648 | data_string_forget(&d1, MDL); | |
649 | } | |
650 | /* Set up the outgoing FQDN option if there was an incoming | |
651 | * FQDN option. If there's a valid FQDN option, there MUST | |
652 | * be an FQDN_SERVER_UPDATES suboption, it's part of the fixed | |
653 | * length head of the option contents, so we test the latter | |
654 | * to detect the presence of the former. | |
655 | */ | |
656 | } else if ((oc = lookup_option(&fqdn_universe, packet->options, | |
657 | FQDN_ENCODED)) && | |
658 | buffer_allocate(&bp, ddns_fwd_name.len + 5, MDL)) { | |
478028e7 | 659 | bp -> data [0] = server_updates_a; |
98bd7ca0 DH |
660 | if (!save_option_buffer(&fqdn_universe, options, |
661 | bp, &bp->data [0], 1, | |
662 | FQDN_SERVER_UPDATE, 0)) | |
478028e7 TL |
663 | goto badfqdn; |
664 | bp -> data [1] = server_updates_a; | |
98bd7ca0 DH |
665 | if (!save_option_buffer(&fqdn_universe, options, |
666 | bp, &bp->data [1], 1, | |
f7fdb216 | 667 | FQDN_NO_CLIENT_UPDATE, 0)) |
478028e7 | 668 | goto badfqdn; |
a396d25f | 669 | |
478028e7 | 670 | /* Do the same encoding the client did. */ |
a396d25f DH |
671 | if (evaluate_boolean_option_cache(&ignorep, packet, lease, |
672 | NULL, packet->options, | |
98bd7ca0 | 673 | options, scope, oc, MDL)) |
478028e7 TL |
674 | bp -> data [2] = 1; |
675 | else | |
676 | bp -> data [2] = 0; | |
98bd7ca0 DH |
677 | if (!save_option_buffer(&fqdn_universe, options, |
678 | bp, &bp->data [2], 1, | |
679 | FQDN_ENCODED, 0)) | |
478028e7 | 680 | goto badfqdn; |
98bf1607 | 681 | bp -> data [3] = 255;//isc_rcode_to_ns (rcode1); |
98bd7ca0 DH |
682 | if (!save_option_buffer(&fqdn_universe, options, |
683 | bp, &bp->data [3], 1, | |
684 | FQDN_RCODE1, 0)) | |
478028e7 | 685 | goto badfqdn; |
98bf1607 | 686 | bp -> data [4] = 255;//isc_rcode_to_ns (rcode2); |
98bd7ca0 DH |
687 | if (!save_option_buffer(&fqdn_universe, options, |
688 | bp, &bp->data [4], 1, | |
689 | FQDN_RCODE2, 0)) | |
478028e7 TL |
690 | goto badfqdn; |
691 | if (ddns_fwd_name.len) { | |
692 | memcpy (&bp -> data [5], | |
693 | ddns_fwd_name.data, ddns_fwd_name.len); | |
98bd7ca0 DH |
694 | if (!save_option_buffer(&fqdn_universe, options, |
695 | bp, &bp->data [5], | |
478028e7 | 696 | ddns_fwd_name.len, |
f7fdb216 | 697 | FQDN_FQDN, 0)) |
478028e7 TL |
698 | goto badfqdn; |
699 | } | |
b992d7e2 DN |
700 | } |
701 | ||
478028e7 TL |
702 | badfqdn: |
703 | out: | |
b992d7e2 DN |
704 | /* |
705 | * Final cleanup. | |
706 | */ | |
98bf1607 SR |
707 | if (ddns_cb != NULL) { |
708 | ddns_cb_free(ddns_cb, MDL); | |
709 | } | |
710 | ||
a396d25f DH |
711 | data_string_forget(&d1, MDL); |
712 | data_string_forget(&ddns_hostname, MDL); | |
713 | data_string_forget(&ddns_domainname, MDL); | |
714 | data_string_forget(&old_ddns_fwd_name, MDL); | |
715 | data_string_forget(&ddns_fwd_name, MDL); | |
98bf1607 SR |
716 | //data_string_forget(&ddns_rev_name, MDL); |
717 | //data_string_forget(&ddns_dhcid, MDL); | |
c3993513 | 718 | if (bp) |
a396d25f | 719 | buffer_dereference(&bp, MDL); |
b992d7e2 | 720 | |
478028e7 | 721 | return result; |
b992d7e2 DN |
722 | } |
723 | ||
d13db163 | 724 | /*%< |
98bf1607 SR |
725 | * Utility function to update text strings within a lease. |
726 | * | |
727 | * The first issue is to find the proper scope. Sometimes we shall be | |
728 | * called with a pointer to the scope in other cases we need to find | |
729 | * the proper lease and then get the scope. Once we have the scope we update | |
730 | * the proper strings, as indicated by the state value in the control block. | |
731 | * Lastly, if we needed to find the scope we write it out, if we used a | |
732 | * scope that was passed as an argument we don't write it, assuming that | |
733 | * our caller (or his ...) will do the write. | |
d13db163 SR |
734 | * |
735 | *\li ddns_cb - the control block for the DDNS request | |
736 | * | |
737 | *\li inscope - a pointer to the scope to update. This may be NULL | |
738 | * in which case we use the control block to find the lease and | |
739 | * then the scope. | |
740 | * | |
741 | * Returns | |
742 | *\li ISC_R_SUCCESS | |
743 | * | |
744 | *\li ISC_R_FAILURE - The routine was unable to find an expected scope. | |
745 | * In some cases (static and inactive leases) we don't expect a scope | |
746 | * and return success. | |
98bf1607 SR |
747 | */ |
748 | ||
749 | isc_result_t | |
750 | ddns_update_lease_text(dhcp_ddns_cb_t *ddns_cb, | |
751 | struct binding_scope **inscope) | |
752 | { | |
753 | struct binding_scope **scope = NULL; | |
754 | struct lease *lease = NULL; | |
755 | struct iasubopt *lease6 = NULL; | |
756 | struct ipv6_pool *pool = NULL; | |
757 | struct in6_addr addr; | |
758 | struct data_string lease_dhcid; | |
759 | ||
3221151b SR |
760 | /* |
761 | * If the lease was static (for a fixed address) | |
762 | * we don't need to do any work. | |
763 | */ | |
764 | if (ddns_cb->flags & DDNS_STATIC_LEASE) | |
765 | return (ISC_R_SUCCESS); | |
766 | ||
0ef9a46e SR |
767 | /* |
768 | * If we are processing an expired or released v6 lease | |
d13db163 SR |
769 | * or some types of v4 leases we don't actually have a |
770 | * scope to update | |
0ef9a46e | 771 | */ |
d13db163 | 772 | if ((ddns_cb->flags & DDNS_ACTIVE_LEASE) == 0) |
0ef9a46e | 773 | return (ISC_R_SUCCESS); |
0ef9a46e | 774 | |
98bf1607 SR |
775 | if (inscope != NULL) { |
776 | scope = inscope; | |
777 | } else if (ddns_cb->address.len == 4) { | |
778 | if (find_lease_by_ip_addr(&lease, ddns_cb->address, MDL) != 0){ | |
779 | scope = &(lease->scope); | |
780 | } | |
781 | } else if (ddns_cb->address.len == 16) { | |
782 | memcpy(&addr, &ddns_cb->address.iabuf, 16); | |
783 | if ((find_ipv6_pool(&pool, D6O_IA_TA, &addr) == | |
784 | ISC_R_SUCCESS) || | |
785 | (find_ipv6_pool(&pool, D6O_IA_NA, &addr) == | |
786 | ISC_R_SUCCESS)) { | |
787 | if (iasubopt_hash_lookup(&lease6, pool->leases, | |
788 | &addr, 16, MDL)) { | |
789 | scope = &(lease6->scope); | |
790 | } | |
791 | ipv6_pool_dereference(&pool, MDL); | |
792 | } | |
793 | } else { | |
794 | log_fatal("Impossible condition at %s:%d.", MDL); | |
795 | } | |
796 | ||
797 | if (scope == NULL) { | |
798 | /* If necessary get rid of the lease */ | |
799 | if (lease) { | |
800 | lease_dereference(&lease, MDL); | |
801 | } | |
802 | else if (lease6) { | |
803 | iasubopt_dereference(&lease6, MDL); | |
804 | } | |
805 | ||
806 | return(ISC_R_FAILURE); | |
807 | } | |
808 | ||
809 | /* We now have a scope and can proceed to update it */ | |
810 | switch(ddns_cb->state) { | |
811 | case DDNS_STATE_REM_PTR: | |
812 | unset(*scope, "ddns-rev-name"); | |
813 | if ((ddns_cb->flags & DDNS_CLIENT_DID_UPDATE) != 0) { | |
814 | unset(*scope, "ddns-client-fqdn"); | |
815 | } | |
816 | break; | |
817 | ||
818 | case DDNS_STATE_ADD_PTR: | |
819 | case DDNS_STATE_CLEANUP: | |
820 | bind_ds_value(scope, "ddns-rev-name", &ddns_cb->rev_name); | |
821 | if ((ddns_cb->flags & DDNS_UPDATE_ADDR) == 0) { | |
822 | bind_ds_value(scope, "ddns-client-fqdn", | |
823 | &ddns_cb->fwd_name); | |
824 | } | |
825 | break; | |
826 | ||
827 | case DDNS_STATE_ADD_FW_YXDHCID: | |
828 | case DDNS_STATE_ADD_FW_NXDOMAIN: | |
829 | bind_ds_value(scope, "ddns-fwd-name", &ddns_cb->fwd_name); | |
830 | ||
831 | /* convert from dns version to lease version of dhcid */ | |
832 | memset(&lease_dhcid, 0, sizeof(lease_dhcid)); | |
833 | dhcid_tolease(&ddns_cb->dhcid, &lease_dhcid); | |
834 | bind_ds_value(scope, "ddns-txt", &lease_dhcid); | |
835 | data_string_forget(&lease_dhcid, MDL); | |
836 | ||
837 | break; | |
838 | ||
839 | case DDNS_STATE_REM_FW_NXRR: | |
840 | case DDNS_STATE_REM_FW_YXDHCID: | |
841 | unset(*scope, "ddns-fwd-name"); | |
842 | unset(*scope, "ddns-txt"); | |
843 | break; | |
844 | } | |
845 | ||
846 | /* If necessary write it out and get rid of the lease */ | |
847 | if (lease) { | |
848 | write_lease(lease); | |
849 | lease_dereference(&lease, MDL); | |
850 | } else if (lease6) { | |
851 | write_ia(lease6->ia); | |
852 | iasubopt_dereference(&lease6, MDL); | |
853 | } | |
854 | ||
855 | return(ISC_R_SUCCESS); | |
856 | } | |
857 | ||
beaed73f SR |
858 | /* |
859 | * This function should be called when update_lease_ptr function fails. | |
860 | * It does inform user about the condition, provides some hints how to | |
861 | * resolve this and dies gracefully. This can happend in at least three | |
862 | * cases (all are configuration mistakes): | |
863 | * a) IPv4: user have duplicate fixed-address entries (the same | |
864 | * address is defined twice). We may have found wrong lease. | |
865 | * b) IPv6: user have overlapping pools (we tried to find | |
866 | * a lease in a wrong pool) | |
867 | * c) IPv6: user have duplicate fixed-address6 entires (the same | |
868 | * address is defined twice). We may have found wrong lease. | |
869 | * | |
870 | * Comment: while it would be possible to recover from both cases | |
871 | * by forcibly searching for leases in *all* following pools, that would | |
872 | * only hide the real problem - a misconfiguration. Proper solution | |
873 | * is to log the problem, die and let the user fix his config file. | |
874 | */ | |
875 | void | |
876 | update_lease_failed(struct lease *lease, | |
877 | struct iasubopt *lease6, | |
878 | dhcp_ddns_cb_t *ddns_cb, | |
879 | dhcp_ddns_cb_t *ddns_cb_set, | |
880 | const char * file, int line) | |
881 | { | |
882 | char lease_address[MAX_ADDRESS_STRING_LEN + 64]; | |
883 | char reason[128]; /* likely reason */ | |
884 | ||
885 | sprintf(reason, "unknown"); | |
886 | sprintf(lease_address, "unknown"); | |
887 | ||
3221151b SR |
888 | /* |
889 | * let's pretend that everything is ok, so we can continue for | |
890 | * information gathering purposes | |
891 | */ | |
beaed73f SR |
892 | |
893 | if (ddns_cb != NULL) { | |
894 | strncpy(lease_address, piaddr(ddns_cb->address), | |
895 | MAX_ADDRESS_STRING_LEN); | |
896 | ||
897 | if (ddns_cb->address.len == 4) { | |
898 | sprintf(reason, "duplicate IPv4 fixed-address entry"); | |
899 | } else if (ddns_cb->address.len == 16) { | |
900 | sprintf(reason, "duplicate IPv6 fixed-address6 entry " | |
901 | "or overlapping pools"); | |
902 | } else { | |
903 | /* | |
904 | * Should not happen. We have non-IPv4, non-IPv6 | |
905 | * address. Something is very wrong here. | |
906 | */ | |
907 | sprintf(reason, "corrupted ddns_cb structure (address " | |
908 | "length is %d)", ddns_cb->address.len); | |
909 | } | |
910 | } | |
911 | ||
912 | log_error("Failed to properly update internal lease structure with " | |
913 | "DDNS"); | |
914 | log_error("control block structures. Tried to update lease for" | |
915 | "%s address, ddns_cb=%p.", lease_address, ddns_cb); | |
916 | ||
917 | log_error("%s", ""); | |
918 | log_error("This condition can occur, if DHCP server configuration is " | |
919 | "inconsistent."); | |
920 | log_error("In particular, please do check that your configuration:"); | |
921 | log_error("a) does not have overlapping pools (especially containing"); | |
922 | log_error(" %s address).", lease_address); | |
923 | log_error("b) there are no duplicate fixed-address or fixed-address6"); | |
924 | log_error("entries for the %s address.", lease_address); | |
925 | log_error("%s", ""); | |
926 | log_error("Possible reason for this failure: %s", reason); | |
927 | ||
928 | log_fatal("%s(%d): Failed to update lease database with DDNS info for " | |
929 | "address %s. Lease database inconsistent. Unable to recover." | |
930 | " Terminating.", file, line, lease_address); | |
931 | } | |
932 | ||
933 | /* | |
934 | * utility function to update found lease. It does extra checks | |
935 | * that we are indeed updating the right lease. It may happen | |
936 | * that user have duplicate fixed-address entries, so we attempt | |
937 | * to update wrong lease. See also safe_lease6_update. | |
938 | */ | |
939 | ||
940 | void | |
941 | safe_lease_update(struct lease *lease, | |
beaed73f SR |
942 | dhcp_ddns_cb_t *oldcb, |
943 | dhcp_ddns_cb_t *newcb, | |
944 | const char *file, int line) | |
945 | { | |
3221151b SR |
946 | if (lease == NULL) { |
947 | /* should never get here */ | |
948 | log_fatal("Impossible condition at %s:%d (called from %s:%d).", | |
949 | MDL, file, line); | |
950 | } | |
beaed73f | 951 | |
3221151b SR |
952 | if ( (lease->ddns_cb == NULL) && (newcb == NULL) ) { |
953 | /* | |
954 | * Trying to clean up pointer that is already null. We | |
955 | * are most likely trying to update wrong lease here. | |
956 | */ | |
beaed73f | 957 | |
3221151b SR |
958 | /* |
959 | * Previously this error message popped out during | |
960 | * DNS update for fixed leases. As we no longer | |
961 | * try to update the lease for a fixed (static) lease | |
962 | * this should not be a problem. | |
963 | */ | |
964 | log_error("%s(%d): Invalid lease update. Tried to " | |
965 | "clear already NULL DDNS control block " | |
966 | "pointer for lease %s.", | |
967 | file, line, piaddr(lease->ip_addr) ); | |
beaed73f SR |
968 | |
969 | #if defined (DNS_UPDATES_MEMORY_CHECKS) | |
3221151b | 970 | update_lease_failed(lease, NULL, oldcb, newcb, file, line); |
beaed73f | 971 | #endif |
3221151b SR |
972 | /* |
973 | * May not reach this: update_lease_failed calls | |
974 | * log_fatal. | |
975 | */ | |
976 | return; | |
977 | } | |
beaed73f | 978 | |
3221151b SR |
979 | if ( (lease->ddns_cb != NULL) && (lease->ddns_cb != oldcb) ) { |
980 | /* | |
981 | * There is existing cb structure, but it differs from | |
982 | * what we expected to see there. Most likely we are | |
983 | * trying to update wrong lease. | |
984 | */ | |
985 | log_error("%s(%d): Failed to update internal lease " | |
986 | "structure with DDNS control block. Existing" | |
987 | " ddns_cb structure does not match " | |
988 | "expectations.IPv4=%s, old ddns_cb=%p, tried" | |
989 | "to update to new ddns_cb=%p", file, line, | |
990 | piaddr(lease->ip_addr), oldcb, newcb); | |
beaed73f SR |
991 | |
992 | #if defined (DNS_UPDATES_MEMORY_CHECKS) | |
3221151b | 993 | update_lease_failed(lease, NULL, oldcb, newcb, file, line); |
beaed73f | 994 | #endif |
3221151b SR |
995 | /* |
996 | * May not reach this: update_lease_failed calls | |
997 | * log_fatal. | |
998 | */ | |
999 | return; | |
1000 | } | |
beaed73f | 1001 | |
3221151b SR |
1002 | /* additional IPv4 specific checks may be added here */ |
1003 | ||
1004 | /* update the lease */ | |
1005 | lease->ddns_cb = newcb; | |
1006 | } | |
1007 | ||
1008 | void | |
1009 | safe_lease6_update(struct iasubopt *lease6, | |
1010 | dhcp_ddns_cb_t *oldcb, | |
1011 | dhcp_ddns_cb_t *newcb, | |
1012 | const char *file, int line) | |
1013 | { | |
1014 | char addrbuf[MAX_ADDRESS_STRING_LEN]; | |
1015 | ||
1016 | if (lease6 == NULL) { | |
1017 | /* should never get here */ | |
1018 | log_fatal("Impossible condition at %s:%d (called from %s:%d).", | |
1019 | MDL, file, line); | |
1020 | } | |
1021 | ||
1022 | if ( (lease6->ddns_cb == NULL) && (newcb == NULL) ) { | |
1023 | inet_ntop(AF_INET6, &lease6->addr, addrbuf, | |
1024 | MAX_ADDRESS_STRING_LEN); | |
1025 | /* | |
1026 | * Trying to clean up pointer that is already null. We | |
1027 | * are most likely trying to update wrong lease here. | |
1028 | */ | |
1029 | log_error("%s(%d): Failed to update internal lease " | |
1030 | "structure. Tried to clear already NULL " | |
1031 | "DDNS control block pointer for lease %s.", | |
1032 | file, line, addrbuf); | |
beaed73f SR |
1033 | |
1034 | #if defined (DNS_UPDATES_MEMORY_CHECKS) | |
3221151b | 1035 | update_lease_failed(NULL, lease6, oldcb, newcb, file, line); |
beaed73f SR |
1036 | #endif |
1037 | ||
3221151b SR |
1038 | /* |
1039 | * May not reach this: update_lease_failed calls | |
1040 | * log_fatal. | |
1041 | */ | |
1042 | return; | |
1043 | } | |
beaed73f | 1044 | |
3221151b SR |
1045 | if ( (lease6->ddns_cb != NULL) && (lease6->ddns_cb != oldcb) ) { |
1046 | /* | |
1047 | * there is existing cb structure, but it differs from | |
1048 | * what we expected to see there. Most likely we are | |
1049 | * trying to update wrong lease. | |
1050 | */ | |
1051 | inet_ntop(AF_INET6, &lease6->addr, addrbuf, | |
1052 | MAX_ADDRESS_STRING_LEN); | |
beaed73f | 1053 | |
3221151b SR |
1054 | log_error("%s(%d): Failed to update internal lease " |
1055 | "structure with DDNS control block. Existing" | |
1056 | " ddns_cb structure does not match " | |
1057 | "expectations.IPv6=%s, old ddns_cb=%p, tried" | |
1058 | "to update to new ddns_cb=%p", file, line, | |
1059 | addrbuf, oldcb, newcb); | |
beaed73f SR |
1060 | |
1061 | #if defined (DNS_UPDATES_MEMORY_CHECKS) | |
3221151b | 1062 | update_lease_failed(NULL, lease6, oldcb, newcb, file, line); |
beaed73f | 1063 | #endif |
3221151b SR |
1064 | /* |
1065 | * May not reach this: update_lease_failed calls | |
1066 | * log_fatal. | |
1067 | */ | |
1068 | return; | |
beaed73f | 1069 | } |
3221151b SR |
1070 | /* additional IPv6 specific checks may be added here */ |
1071 | ||
1072 | /* update the lease */ | |
1073 | lease6->ddns_cb = newcb; | |
beaed73f SR |
1074 | } |
1075 | ||
98bf1607 SR |
1076 | /* |
1077 | * Utility function to update the pointer to the DDNS control block | |
1078 | * in a lease. | |
1079 | * SUCCESS - able to update the pointer | |
1080 | * FAILURE - lease didn't exist or sanity checks failed | |
1081 | * lease and lease6 may be empty in which case we attempt to find | |
1082 | * the lease from the ddns_cb information. | |
1083 | * ddns_cb is the control block to use if a lookup is necessary | |
1084 | * ddns_cb_set is the pointer to insert into the lease and may be NULL | |
1085 | * The last two arguments may look odd as they will be the same much of the | |
1086 | * time, but I need an argument to tell me if I'm setting or clearing in | |
1087 | * addition to the address information from the cb to look up the lease. | |
1088 | * using the same value twice allows me more flexibility. | |
1089 | */ | |
1090 | ||
1091 | isc_result_t | |
1092 | ddns_update_lease_ptr(struct lease *lease, | |
1093 | struct iasubopt *lease6, | |
1094 | dhcp_ddns_cb_t *ddns_cb, | |
beaed73f SR |
1095 | dhcp_ddns_cb_t *ddns_cb_set, |
1096 | const char * file, int line) | |
98bf1607 | 1097 | { |
beaed73f | 1098 | char ddns_address[MAX_ADDRESS_STRING_LEN]; |
3221151b | 1099 | sprintf(ddns_address, "unknown"); |
0f750c4f SR |
1100 | if (ddns_cb == NULL) { |
1101 | log_info("%s(%d): No control block for lease update", | |
1102 | file, line); | |
1103 | return (ISC_R_FAILURE); | |
1104 | } | |
1105 | else { | |
beaed73f SR |
1106 | strncpy(ddns_address, piaddr(ddns_cb->address), |
1107 | MAX_ADDRESS_STRING_LEN); | |
1108 | } | |
1109 | #if defined (DEBUG_DNS_UPDATES) | |
1110 | log_info("%s(%d): Updating lease_ptr for ddns_cp=%p (addr=%s)", | |
1111 | file, line, ddns_cb, ddns_address ); | |
1112 | #endif | |
1113 | ||
3221151b SR |
1114 | /* |
1115 | * If the lease was static (for a fixed address) | |
1116 | * we don't need to do any work. | |
1117 | */ | |
1118 | if (ddns_cb->flags & DDNS_STATIC_LEASE) { | |
1119 | #if defined (DEBUG_DNS_UPDATES) | |
1120 | log_info("lease is static, returning"); | |
1121 | #endif | |
1122 | return (ISC_R_SUCCESS); | |
1123 | } | |
1124 | ||
0ef9a46e SR |
1125 | /* |
1126 | * If we are processing an expired or released v6 lease | |
d13db163 | 1127 | * we don't actually have a lease to update |
0ef9a46e SR |
1128 | */ |
1129 | if ((ddns_cb->address.len == 16) && | |
1130 | ((ddns_cb->flags & DDNS_ACTIVE_LEASE) == 0)) { | |
1131 | return (ISC_R_SUCCESS); | |
1132 | } | |
1133 | ||
98bf1607 | 1134 | if (lease != NULL) { |
3221151b | 1135 | safe_lease_update(lease, ddns_cb, ddns_cb_set, |
beaed73f | 1136 | file, line); |
98bf1607 | 1137 | } else if (lease6 != NULL) { |
3221151b | 1138 | safe_lease6_update(lease6, ddns_cb, ddns_cb_set, |
beaed73f | 1139 | file, line); |
98bf1607 SR |
1140 | } else if (ddns_cb->address.len == 4) { |
1141 | struct lease *find_lease = NULL; | |
1142 | if (find_lease_by_ip_addr(&find_lease, | |
1143 | ddns_cb->address, MDL) != 0) { | |
beaed73f SR |
1144 | #if defined (DEBUG_DNS_UPDATES) |
1145 | log_info("%s(%d): find_lease_by_ip_addr(%s) successful:" | |
1146 | "lease=%p", file, line, ddns_address, | |
1147 | find_lease); | |
1148 | #endif | |
1149 | ||
3221151b | 1150 | safe_lease_update(find_lease, ddns_cb, |
beaed73f | 1151 | ddns_cb_set, file, line); |
98bf1607 SR |
1152 | lease_dereference(&find_lease, MDL); |
1153 | } | |
1154 | else { | |
beaed73f | 1155 | log_error("%s(%d): ddns_update_lease_ptr failed. " |
3221151b | 1156 | "Lease for %s not found.", |
beaed73f | 1157 | file, line, piaddr(ddns_cb->address)); |
beaed73f SR |
1158 | |
1159 | #if defined (DNS_UPDATES_MEMORY_CHECKS) | |
1160 | update_lease_failed(NULL, NULL, ddns_cb, ddns_cb_set, | |
1161 | file, line); | |
1162 | #endif | |
1163 | /* | |
1164 | * may not reach this. update_lease_failed | |
1165 | * calls log_fatal. | |
1166 | */ | |
1167 | return(ISC_R_FAILURE); | |
1168 | ||
98bf1607 SR |
1169 | } |
1170 | } else if (ddns_cb->address.len == 16) { | |
1171 | struct iasubopt *find_lease6 = NULL; | |
1172 | struct ipv6_pool *pool = NULL; | |
1173 | struct in6_addr addr; | |
beaed73f | 1174 | char addrbuf[MAX_ADDRESS_STRING_LEN]; |
98bf1607 SR |
1175 | |
1176 | memcpy(&addr, &ddns_cb->address.iabuf, 16); | |
1177 | if ((find_ipv6_pool(&pool, D6O_IA_TA, &addr) != | |
1178 | ISC_R_SUCCESS) && | |
1179 | (find_ipv6_pool(&pool, D6O_IA_NA, &addr) != | |
1180 | ISC_R_SUCCESS)) { | |
0ef9a46e | 1181 | inet_ntop(AF_INET6, &addr, addrbuf, |
beaed73f SR |
1182 | MAX_ADDRESS_STRING_LEN); |
1183 | log_error("%s(%d): Pool for lease %s not found.", | |
1184 | file, line, addrbuf); | |
1185 | #if defined (DNS_UPDATES_MEMORY_CHECKS) | |
1186 | update_lease_failed(NULL, NULL, ddns_cb, ddns_cb_set, | |
1187 | file, line); | |
1188 | #endif | |
1189 | /* | |
1190 | * never reached. update_lease_failed | |
1191 | * calls log_fatal. | |
1192 | */ | |
98bf1607 SR |
1193 | return(ISC_R_FAILURE); |
1194 | } | |
1195 | ||
3221151b | 1196 | if (iasubopt_hash_lookup(&find_lease6, pool->leases, |
98bf1607 SR |
1197 | &addr, 16, MDL)) { |
1198 | find_lease6->ddns_cb = ddns_cb_set; | |
1199 | iasubopt_dereference(&find_lease6, MDL); | |
1200 | } else { | |
0ef9a46e | 1201 | inet_ntop(AF_INET6, &addr, addrbuf, |
beaed73f SR |
1202 | MAX_ADDRESS_STRING_LEN); |
1203 | log_error("%s(%d): Lease %s not found within pool.", | |
1204 | file, line, addrbuf); | |
1205 | #if defined (DNS_UPDATES_MEMORY_CHECKS) | |
1206 | update_lease_failed(NULL, NULL, ddns_cb, ddns_cb_set, | |
1207 | file, line); | |
1208 | #endif | |
1209 | /* | |
1210 | * never reached. update_lease_failed | |
1211 | * calls log_fatal. | |
1212 | */ | |
98bf1607 SR |
1213 | return(ISC_R_FAILURE); |
1214 | } | |
1215 | ipv6_pool_dereference(&pool, MDL); | |
1216 | } else { | |
1217 | /* shouldn't get here */ | |
beaed73f SR |
1218 | log_fatal("Impossible condition at %s:%d, called from %s:%d.", |
1219 | MDL, file, line); | |
98bf1607 SR |
1220 | } |
1221 | ||
1222 | return(ISC_R_SUCCESS); | |
1223 | } | |
1224 | ||
1225 | void | |
1226 | ddns_ptr_add(dhcp_ddns_cb_t *ddns_cb, | |
1227 | isc_result_t eresult) | |
1228 | { | |
1229 | if (eresult == ISC_R_SUCCESS) { | |
7aa153b8 | 1230 | log_info("Added reverse map from %.*s to %.*s", |
98bf1607 SR |
1231 | (int)ddns_cb->rev_name.len, |
1232 | (const char *)ddns_cb->rev_name.data, | |
1233 | (int)ddns_cb->fwd_name.len, | |
1234 | (const char *)ddns_cb->fwd_name.data); | |
1235 | ||
1236 | ddns_update_lease_text(ddns_cb, NULL); | |
1237 | } else { | |
7aa153b8 | 1238 | log_error("Unable to add reverse map from %.*s to %.*s: %s", |
98bf1607 SR |
1239 | (int)ddns_cb->rev_name.len, |
1240 | (const char *)ddns_cb->rev_name.data, | |
1241 | (int)ddns_cb->fwd_name.len, | |
1242 | (const char *)ddns_cb->fwd_name.data, | |
1243 | isc_result_totext (eresult)); | |
1244 | } | |
1245 | ||
beaed73f | 1246 | ddns_update_lease_ptr(NULL, NULL, ddns_cb, NULL, MDL); |
98bf1607 SR |
1247 | ddns_cb_free(ddns_cb, MDL); |
1248 | /* | |
1249 | * A single DDNS operation may require several calls depending on | |
1250 | * the current state as the prerequisites for the first message | |
1251 | * may not succeed requiring a second operation and potentially | |
1252 | * a ptr operation after that. The commit_leases operation is | |
1253 | * invoked at the end of this set of operations in order to require | |
1254 | * a single write for all of the changes. We call commit_leases | |
1255 | * here rather than immediately after the call to update the lease | |
1256 | * text in order to save any previously written data. | |
1257 | */ | |
1258 | commit_leases(); | |
1259 | return; | |
1260 | } | |
1261 | ||
1262 | /* | |
1263 | * action routine when trying to remove a pointer | |
1264 | * this will be called after the ddns queries have completed | |
1265 | * if we succeeded in removing the pointer we go to the next step (if any) | |
1266 | * if not we cleanup and leave. | |
1267 | */ | |
1268 | ||
1269 | void | |
1270 | ddns_ptr_remove(dhcp_ddns_cb_t *ddns_cb, | |
1271 | isc_result_t eresult) | |
1272 | { | |
1273 | isc_result_t result = eresult; | |
1274 | ||
1275 | switch(eresult) { | |
1276 | case ISC_R_SUCCESS: | |
7aa153b8 | 1277 | log_info("Removed reverse map on %.*s", |
98bf1607 SR |
1278 | (int)ddns_cb->rev_name.len, |
1279 | (const char *)ddns_cb->rev_name.data); | |
1280 | /* fall through */ | |
1281 | case DNS_R_NXRRSET: | |
1282 | case DNS_R_NXDOMAIN: | |
1283 | /* No entry is the same as success. | |
1284 | * Remove the information from the lease and | |
1285 | * continue with any next step */ | |
1286 | ddns_update_lease_text(ddns_cb, NULL); | |
1287 | ||
1288 | /* trigger any add operation */ | |
1289 | result = ISC_R_SUCCESS; | |
87132514 SR |
1290 | #if defined (DEBUG_DNS_UPDATES) |
1291 | log_info("DDNS: removed map or no reverse map to remove %.*s", | |
1292 | (int)ddns_cb->rev_name.len, | |
1293 | (const char *)ddns_cb->rev_name.data); | |
1294 | #endif | |
98bf1607 SR |
1295 | break; |
1296 | ||
1297 | default: | |
7aa153b8 | 1298 | log_error("Can't remove reverse map on %.*s: %s", |
98bf1607 SR |
1299 | (int)ddns_cb->rev_name.len, |
1300 | (const char *)ddns_cb->rev_name.data, | |
1301 | isc_result_totext (eresult)); | |
1302 | break; | |
1303 | } | |
1304 | ||
beaed73f | 1305 | ddns_update_lease_ptr(NULL, NULL, ddns_cb, NULL, MDL); |
98bf1607 SR |
1306 | ddns_fwd_srv_connector(NULL, NULL, NULL, ddns_cb->next_op, result); |
1307 | ddns_cb_free(ddns_cb, MDL); | |
1308 | return; | |
1309 | } | |
1310 | ||
1311 | ||
1312 | /* | |
1313 | * If the first query succeeds, the updater can conclude that it | |
1314 | * has added a new name whose only RRs are the A and DHCID RR records. | |
1315 | * The A RR update is now complete (and a client updater is finished, | |
1316 | * while a server might proceed to perform a PTR RR update). | |
1317 | * -- "Interaction between DHCP and DNS" | |
1318 | * | |
1319 | * If the second query succeeds, the updater can conclude that the current | |
1320 | * client was the last client associated with the domain name, and that | |
1321 | * the name now contains the updated A RR. The A RR update is now | |
1322 | * complete (and a client updater is finished, while a server would | |
1323 | * then proceed to perform a PTR RR update). | |
1324 | * -- "Interaction between DHCP and DNS" | |
1325 | * | |
1326 | * If the second query fails with NXRRSET, the updater must conclude | |
1327 | * that the client's desired name is in use by another host. At this | |
1328 | * juncture, the updater can decide (based on some administrative | |
1329 | * configuration outside of the scope of this document) whether to let | |
1330 | * the existing owner of the name keep that name, and to (possibly) | |
1331 | * perform some name disambiguation operation on behalf of the current | |
1332 | * client, or to replace the RRs on the name with RRs that represent | |
1333 | * the current client. If the configured policy allows replacement of | |
1334 | * existing records, the updater submits a query that deletes the | |
1335 | * existing A RR and the existing DHCID RR, adding A and DHCID RRs that | |
1336 | * represent the IP address and client-identity of the new client. | |
1337 | * -- "Interaction between DHCP and DNS" | |
1338 | */ | |
1339 | ||
1340 | void | |
1341 | ddns_fwd_srv_add2(dhcp_ddns_cb_t *ddns_cb, | |
1342 | isc_result_t eresult) | |
1343 | { | |
1344 | isc_result_t result; | |
1345 | const char *logstr = NULL; | |
beaed73f | 1346 | char ddns_address[MAX_ADDRESS_STRING_LEN]; |
98bf1607 SR |
1347 | |
1348 | /* Construct a printable form of the address for logging */ | |
1349 | strcpy(ddns_address, piaddr(ddns_cb->address)); | |
1350 | ||
1351 | switch(eresult) { | |
1352 | case ISC_R_SUCCESS: | |
1353 | log_info("Added new forward map from %.*s to %s", | |
1354 | (int)ddns_cb->fwd_name.len, | |
1355 | (const char *)ddns_cb->fwd_name.data, | |
1356 | ddns_address); | |
1357 | ||
1358 | ddns_update_lease_text(ddns_cb, NULL); | |
1359 | ||
1360 | if ((ddns_cb->flags & DDNS_UPDATE_PTR) != 0) { | |
1361 | /* if we have zone information get rid of it */ | |
1362 | if (ddns_cb->zone != NULL) { | |
1363 | ddns_cb_forget_zone(ddns_cb); | |
1364 | } | |
1365 | ||
1366 | ddns_cb->state = DDNS_STATE_ADD_PTR; | |
1367 | ddns_cb->cur_func = ddns_ptr_add; | |
1368 | ||
87132514 | 1369 | result = ddns_modify_ptr(ddns_cb, MDL); |
98bf1607 SR |
1370 | if (result == ISC_R_SUCCESS) { |
1371 | return; | |
1372 | } | |
1373 | } | |
1374 | break; | |
1375 | ||
1376 | case DNS_R_YXRRSET: | |
1377 | case DNS_R_YXDOMAIN: | |
1378 | logstr = "DHCID mismatch, belongs to another client."; | |
1379 | break; | |
1380 | ||
1381 | case DNS_R_NXRRSET: | |
1382 | case DNS_R_NXDOMAIN: | |
1383 | logstr = "Has an address record but no DHCID, not mine."; | |
1384 | break; | |
1385 | ||
1386 | default: | |
1387 | logstr = isc_result_totext(eresult); | |
1388 | break; | |
1389 | } | |
1390 | ||
1391 | if (logstr != NULL) { | |
1392 | log_error("Forward map from %.*s to %s FAILED: %s", | |
1393 | (int)ddns_cb->fwd_name.len, | |
1394 | (const char *)ddns_cb->fwd_name.data, | |
1395 | ddns_address, logstr); | |
1396 | } | |
1397 | ||
beaed73f | 1398 | ddns_update_lease_ptr(NULL, NULL, ddns_cb, NULL, MDL); |
98bf1607 SR |
1399 | ddns_cb_free(ddns_cb, MDL); |
1400 | /* | |
1401 | * A single DDNS operation may require several calls depending on | |
1402 | * the current state as the prerequisites for the first message | |
1403 | * may not succeed requiring a second operation and potentially | |
1404 | * a ptr operation after that. The commit_leases operation is | |
1405 | * invoked at the end of this set of operations in order to require | |
1406 | * a single write for all of the changes. We call commit_leases | |
1407 | * here rather than immediately after the call to update the lease | |
1408 | * text in order to save any previously written data. | |
1409 | */ | |
1410 | commit_leases(); | |
1411 | return; | |
1412 | } | |
1413 | ||
1414 | void | |
1415 | ddns_fwd_srv_add1(dhcp_ddns_cb_t *ddns_cb, | |
1416 | isc_result_t eresult) | |
1417 | { | |
1418 | isc_result_t result; | |
beaed73f | 1419 | char ddns_address[MAX_ADDRESS_STRING_LEN]; |
98bf1607 SR |
1420 | |
1421 | /* Construct a printable form of the address for logging */ | |
1422 | strcpy(ddns_address, piaddr(ddns_cb->address)); | |
1423 | ||
1424 | switch(eresult) { | |
1425 | case ISC_R_SUCCESS: | |
1426 | log_info ("Added new forward map from %.*s to %s", | |
1427 | (int)ddns_cb->fwd_name.len, | |
1428 | (const char *)ddns_cb->fwd_name.data, | |
1429 | ddns_address); | |
1430 | ||
1431 | ddns_update_lease_text(ddns_cb, NULL); | |
1432 | ||
1433 | if ((ddns_cb->flags & DDNS_UPDATE_PTR) != 0) { | |
1434 | /* if we have zone information get rid of it */ | |
1435 | if (ddns_cb->zone != NULL) { | |
1436 | ddns_cb_forget_zone(ddns_cb); | |
1437 | } | |
1438 | ||
1439 | ddns_cb->state = DDNS_STATE_ADD_PTR; | |
1440 | ddns_cb->cur_func = ddns_ptr_add; | |
1441 | ||
87132514 | 1442 | result = ddns_modify_ptr(ddns_cb, MDL); |
98bf1607 SR |
1443 | if (result == ISC_R_SUCCESS) { |
1444 | return; | |
1445 | } | |
1446 | } | |
98bf1607 SR |
1447 | break; |
1448 | ||
1449 | case DNS_R_YXDOMAIN: | |
1450 | /* we can reuse the zone information */ | |
1451 | ddns_cb->state = DDNS_STATE_ADD_FW_YXDHCID; | |
1452 | ddns_cb->cur_func = ddns_fwd_srv_add2; | |
1453 | ||
87132514 | 1454 | result = ddns_modify_fwd(ddns_cb, MDL); |
98bf1607 SR |
1455 | if (result == ISC_R_SUCCESS) { |
1456 | return; | |
1457 | } | |
98bf1607 SR |
1458 | break; |
1459 | ||
1460 | default: | |
1461 | log_error ("Unable to add forward map from %.*s to %s: %s", | |
1462 | (int)ddns_cb->fwd_name.len, | |
1463 | (const char *)ddns_cb->fwd_name.data, | |
1464 | ddns_address, | |
1465 | isc_result_totext (eresult)); | |
1466 | break; | |
1467 | } | |
1468 | ||
beaed73f | 1469 | ddns_update_lease_ptr(NULL, NULL, ddns_cb, NULL, MDL); |
98bf1607 SR |
1470 | ddns_cb_free(ddns_cb, MDL); |
1471 | /* | |
1472 | * A single DDNS operation may require several calls depending on | |
1473 | * the current state as the prerequisites for the first message | |
1474 | * may not succeed requiring a second operation and potentially | |
1475 | * a ptr operation after that. The commit_leases operation is | |
1476 | * invoked at the end of this set of operations in order to require | |
1477 | * a single write for all of the changes. We call commit_leases | |
1478 | * here rather than immediately after the call to update the lease | |
1479 | * text in order to save any previously written data. | |
1480 | */ | |
1481 | commit_leases(); | |
1482 | return; | |
1483 | } | |
1484 | ||
1485 | static void | |
1486 | ddns_fwd_srv_connector(struct lease *lease, | |
1487 | struct iasubopt *lease6, | |
1488 | struct binding_scope **inscope, | |
1489 | dhcp_ddns_cb_t *ddns_cb, | |
1490 | isc_result_t eresult) | |
1491 | { | |
1492 | isc_result_t result = ISC_R_FAILURE; | |
1493 | ||
1494 | if (ddns_cb == NULL) { | |
1495 | /* nothing to do */ | |
1496 | return; | |
1497 | } | |
1498 | ||
1499 | if (eresult == ISC_R_SUCCESS) { | |
1500 | /* | |
1501 | * If we have updates dispatch as appropriate, | |
1502 | * if not do FQDN binding if desired. | |
1503 | */ | |
1504 | ||
1505 | if (ddns_cb->flags & DDNS_UPDATE_ADDR) { | |
1506 | ddns_cb->state = DDNS_STATE_ADD_FW_NXDOMAIN; | |
1507 | ddns_cb->cur_func = ddns_fwd_srv_add1; | |
87132514 | 1508 | result = ddns_modify_fwd(ddns_cb, MDL); |
98bf1607 SR |
1509 | } else if ((ddns_cb->flags & DDNS_UPDATE_PTR) && |
1510 | (ddns_cb->rev_name.len != 0)) { | |
1511 | ddns_cb->state = DDNS_STATE_ADD_PTR; | |
1512 | ddns_cb->cur_func = ddns_ptr_add; | |
87132514 | 1513 | result = ddns_modify_ptr(ddns_cb, MDL); |
98bf1607 SR |
1514 | } else { |
1515 | ddns_update_lease_text(ddns_cb, inscope); | |
1516 | } | |
1517 | } | |
1518 | ||
1519 | if (result == ISC_R_SUCCESS) { | |
beaed73f | 1520 | ddns_update_lease_ptr(lease, lease6, ddns_cb, ddns_cb, MDL); |
98bf1607 SR |
1521 | } else { |
1522 | ddns_cb_free(ddns_cb, MDL); | |
1523 | } | |
1524 | ||
1525 | return; | |
1526 | } | |
1527 | ||
1528 | /* | |
1529 | * If the first query fails, the updater MUST NOT delete the DNS name. It | |
1530 | * may be that the host whose lease on the server has expired has moved | |
1531 | * to another network and obtained a lease from a different server, | |
1532 | * which has caused the client's A RR to be replaced. It may also be | |
1533 | * that some other client has been configured with a name that matches | |
1534 | * the name of the DHCP client, and the policy was that the last client | |
1535 | * to specify the name would get the name. In this case, the DHCID RR | |
1536 | * will no longer match the updater's notion of the client-identity of | |
1537 | * the host pointed to by the DNS name. | |
1538 | * -- "Interaction between DHCP and DNS" | |
1539 | */ | |
1540 | ||
1541 | void | |
1542 | ddns_fwd_srv_rem2(dhcp_ddns_cb_t *ddns_cb, | |
1543 | isc_result_t eresult) | |
1544 | { | |
1545 | if (eresult == ISC_R_SUCCESS) { | |
1546 | ddns_update_lease_text(ddns_cb, NULL); | |
1547 | ||
1548 | /* Do the next operation */ | |
1549 | if ((ddns_cb->flags & DDNS_UPDATE_PTR) != 0) { | |
1550 | /* if we have zone information get rid of it */ | |
1551 | if (ddns_cb->zone != NULL) { | |
1552 | ddns_cb_forget_zone(ddns_cb); | |
1553 | } | |
1554 | ||
1555 | ddns_cb->state = DDNS_STATE_REM_PTR; | |
1556 | ddns_cb->cur_func = ddns_ptr_remove; | |
1557 | ||
87132514 | 1558 | eresult = ddns_modify_ptr(ddns_cb, MDL); |
98bf1607 SR |
1559 | if (eresult == ISC_R_SUCCESS) { |
1560 | return; | |
1561 | } | |
1562 | } | |
1563 | } | |
1564 | ||
beaed73f | 1565 | ddns_update_lease_ptr(NULL, NULL, ddns_cb, NULL, MDL); |
98bf1607 SR |
1566 | ddns_fwd_srv_connector(NULL, NULL, NULL, ddns_cb->next_op, eresult); |
1567 | ddns_cb_free(ddns_cb, MDL); | |
1568 | return; | |
1569 | } | |
1570 | ||
1571 | ||
1572 | /* | |
1573 | * First action routine when trying to remove a fwd | |
1574 | * this will be called after the ddns queries have completed | |
1575 | * if we succeeded in removing the fwd we go to the next step (if any) | |
1576 | * if not we cleanup and leave. | |
1577 | */ | |
1578 | ||
1579 | void | |
1580 | ddns_fwd_srv_rem1(dhcp_ddns_cb_t *ddns_cb, | |
1581 | isc_result_t eresult) | |
1582 | { | |
1583 | isc_result_t result = eresult; | |
beaed73f | 1584 | char ddns_address[MAX_ADDRESS_STRING_LEN]; |
98bf1607 SR |
1585 | |
1586 | switch(eresult) { | |
1587 | case ISC_R_SUCCESS: | |
7aa153b8 SR |
1588 | /* Construct a printable form of the address for logging */ |
1589 | strcpy(ddns_address, piaddr(ddns_cb->address)); | |
1590 | log_info("Removed forward map from %.*s to %s", | |
1591 | (int)ddns_cb->fwd_name.len, | |
1592 | (const char*)ddns_cb->fwd_name.data, | |
1593 | ddns_address); | |
1594 | ||
98bf1607 SR |
1595 | /* Do the second step of the FWD removal */ |
1596 | ddns_cb->state = DDNS_STATE_REM_FW_NXRR; | |
1597 | ddns_cb->cur_func = ddns_fwd_srv_rem2; | |
87132514 | 1598 | result = ddns_modify_fwd(ddns_cb, MDL); |
98bf1607 SR |
1599 | if (result == ISC_R_SUCCESS) { |
1600 | return; | |
1601 | } | |
1602 | break; | |
1603 | ||
1604 | case DNS_R_NXRRSET: | |
1605 | case DNS_R_NXDOMAIN: | |
1606 | ddns_update_lease_text(ddns_cb, NULL); | |
1607 | ||
87132514 SR |
1608 | #if defined (DEBUG_DNS_UPDATES) |
1609 | log_info("DDNS: no forward map to remove. %p", ddns_cb); | |
1610 | #endif | |
1611 | ||
98bf1607 SR |
1612 | /* Do the next operation */ |
1613 | if ((ddns_cb->flags & DDNS_UPDATE_PTR) != 0) { | |
1614 | /* if we have zone information get rid of it */ | |
1615 | if (ddns_cb->zone != NULL) { | |
1616 | ddns_cb_forget_zone(ddns_cb); | |
1617 | } | |
1618 | ||
1619 | ddns_cb->state = DDNS_STATE_REM_PTR; | |
1620 | ddns_cb->cur_func = ddns_ptr_remove; | |
1621 | ||
87132514 | 1622 | result = ddns_modify_ptr(ddns_cb, MDL); |
98bf1607 SR |
1623 | if (result == ISC_R_SUCCESS) { |
1624 | return; | |
1625 | } | |
1626 | } | |
1627 | else { | |
1628 | /* Trigger the add operation */ | |
1629 | eresult = ISC_R_SUCCESS; | |
1630 | } | |
1631 | break; | |
1632 | ||
1633 | default: | |
1634 | break; | |
1635 | } | |
1636 | ||
beaed73f | 1637 | ddns_update_lease_ptr(NULL, NULL, ddns_cb, NULL, MDL); |
98bf1607 SR |
1638 | ddns_fwd_srv_connector(NULL, NULL, NULL, ddns_cb->next_op, eresult); |
1639 | ddns_cb_free(ddns_cb, MDL); | |
1640 | } | |
1641 | ||
d13db163 | 1642 | /*%< |
98bf1607 SR |
1643 | * Remove relevant entries from DNS. |
1644 | * | |
d13db163 SR |
1645 | * \li lease - lease to start with if this is for v4 |
1646 | * | |
1647 | * \li lease6 - lease to start with if this is for v6 | |
1648 | * | |
1649 | * \li add_ddns_cb - control block for additional DDNS work. This | |
1650 | * is used when the code is going to add a DDNS entry after removing | |
1651 | * the current entry. | |
0ef9a46e | 1652 | * |
d13db163 SR |
1653 | * \li active - indication about the status of the lease. It is |
1654 | * ISC_TRUE if the lease is still active, and FALSE if the lease | |
1655 | * is inactive. This is used to indicate if the lease is inactive or going | |
1656 | * to inactive so we can avoid trying to update the lease with cb pointers | |
1657 | * and text information if it isn't useful. | |
1658 | * | |
1659 | * Returns | |
1660 | * \li #ISC_R_FAILURE - badness occurred and we weren't able to do what was wanted | |
1661 | * \li #ISC_R_SUCCESS - we were able to do stuff but it's in progress | |
1662 | * | |
1663 | * in both cases any additional block has been passed on to it's handler | |
98bf1607 SR |
1664 | */ |
1665 | ||
d13db163 | 1666 | isc_result_t |
98bf1607 SR |
1667 | ddns_removals(struct lease *lease, |
1668 | struct iasubopt *lease6, | |
0ef9a46e SR |
1669 | dhcp_ddns_cb_t *add_ddns_cb, |
1670 | isc_boolean_t active) | |
385fcb27 | 1671 | { |
98bf1607 SR |
1672 | isc_result_t rcode, execute_add = ISC_R_FAILURE; |
1673 | struct binding_scope **scope = NULL; | |
d13db163 | 1674 | isc_result_t result = ISC_R_FAILURE; |
919f1407 | 1675 | dhcp_ddns_cb_t *ddns_cb = NULL; |
98bf1607 | 1676 | struct data_string leaseid; |
b992d7e2 | 1677 | |
919f1407 | 1678 | /* |
d13db163 SR |
1679 | * See if we need to cancel an outstanding request. Mostly this is |
1680 | * used to handle the case where this routine is called twice for | |
1681 | * the same release or abandon event. | |
1682 | * | |
1683 | * When called from the dns code as part of an update request | |
1684 | * (add_ddns_cb != NULL) any outstanding requests will have already | |
1685 | * been cancelled. | |
1686 | * | |
1687 | * If the new request is just a removal and we have an outstanding | |
1688 | * request we have several options: | |
1689 | * | |
1690 | * - we are doing an update or we are doing a removal and the active | |
1691 | * flag has changed from TRUE to FALSE. In these cases we need to | |
1692 | * cancel the old request and start the new one. | |
1693 | * | |
1694 | * - other wise we are doing a removal with the active flag unchanged. | |
1695 | * In this case we can let the current removal continue and do not need | |
1696 | * to start a new one. If the old request included an update to be | |
1697 | * done after the removal we need to kill the update part of the | |
1698 | * request. | |
919f1407 | 1699 | */ |
d13db163 SR |
1700 | |
1701 | if (add_ddns_cb == NULL) { | |
1702 | if ((lease != NULL) && (lease->ddns_cb != NULL)) { | |
1703 | ddns_cb = lease->ddns_cb; | |
1704 | ||
1705 | /* | |
1706 | * Is the old request an update or did the | |
1707 | * the active flag change? | |
1708 | */ | |
1709 | if (((ddns_cb->state == DDNS_STATE_ADD_PTR) || | |
1710 | (ddns_cb->state == DDNS_STATE_ADD_FW_NXDOMAIN) || | |
1711 | (ddns_cb->state == DDNS_STATE_ADD_FW_YXDHCID)) || | |
1712 | ((active == ISC_FALSE) && | |
1713 | ((ddns_cb->flags & DDNS_ACTIVE_LEASE) != 0))) { | |
1714 | /* Cancel the current request */ | |
1715 | ddns_cancel(lease->ddns_cb, MDL); | |
1716 | lease->ddns_cb = NULL; | |
1717 | } else { | |
1718 | /* Remvoval, check and remove updates */ | |
1719 | if (ddns_cb->next_op != NULL) { | |
1720 | ddns_cb_free(ddns_cb->next_op, MDL); | |
1721 | ddns_cb->next_op = NULL; | |
1722 | } | |
1723 | #if defined (DEBUG_DNS_UPDATES) | |
1724 | log_info("DDNS %s(%d): removal already in " | |
1725 | "progress new ddns_cb=%p", | |
1726 | MDL, ddns_cb); | |
1727 | #endif | |
1728 | return (ISC_R_SUCCESS); | |
1729 | } | |
1730 | } else if ((lease6 != NULL) && (lease6->ddns_cb != NULL)) { | |
1731 | ddns_cb = lease6->ddns_cb; | |
1732 | ||
1733 | /* | |
1734 | * Is the old request an update or did the | |
1735 | * the active flag change? | |
1736 | */ | |
1737 | if (((ddns_cb->state == DDNS_STATE_ADD_PTR) || | |
1738 | (ddns_cb->state == DDNS_STATE_ADD_FW_NXDOMAIN) || | |
1739 | (ddns_cb->state == DDNS_STATE_ADD_FW_YXDHCID)) || | |
1740 | ((active == ISC_FALSE) && | |
1741 | ((ddns_cb->flags & DDNS_ACTIVE_LEASE) != 0))) { | |
1742 | /* Cancel the current request */ | |
1743 | ddns_cancel(lease6->ddns_cb, MDL); | |
1744 | lease6->ddns_cb = NULL; | |
1745 | } else { | |
1746 | /* Remvoval, check and remove updates */ | |
1747 | if (ddns_cb->next_op != NULL) { | |
1748 | ddns_cb_free(ddns_cb->next_op, MDL); | |
1749 | ddns_cb->next_op = NULL; | |
1750 | } | |
1751 | #if defined (DEBUG_DNS_UPDATES) | |
1752 | log_info("DDNS %s(%d): removal already in " | |
1753 | "progress new ddns_cb=%p", | |
1754 | MDL, ddns_cb); | |
1755 | #endif | |
1756 | return (ISC_R_SUCCESS); | |
1757 | } | |
1758 | } | |
1759 | ddns_cb = NULL; | |
d208bb04 | 1760 | } |
919f1407 | 1761 | |
98bf1607 SR |
1762 | /* allocate our control block */ |
1763 | ddns_cb = ddns_cb_alloc(MDL); | |
1764 | if (ddns_cb == NULL) { | |
1765 | goto cleanup; | |
1766 | } | |
3221151b SR |
1767 | |
1768 | /* | |
1769 | * For v4 we flag static leases so we don't try | |
1770 | * and manipulate the lease later. For v6 we don't | |
1771 | * get static leases and don't need to flag them. | |
1772 | */ | |
98bd7ca0 DH |
1773 | if (lease != NULL) { |
1774 | scope = &(lease->scope); | |
98bf1607 | 1775 | ddns_cb->address = lease->ip_addr; |
3221151b SR |
1776 | if (lease->flags & STATIC_LEASE) |
1777 | ddns_cb->flags |= DDNS_STATIC_LEASE; | |
98bd7ca0 DH |
1778 | } else if (lease6 != NULL) { |
1779 | scope = &(lease6->scope); | |
98bf1607 SR |
1780 | memcpy(&ddns_cb->address.iabuf, lease6->addr.s6_addr, 16); |
1781 | ddns_cb->address.len = 16; | |
98bd7ca0 | 1782 | } else |
98bf1607 | 1783 | goto cleanup; |
98bd7ca0 | 1784 | |
0ef9a46e SR |
1785 | /* |
1786 | * Set the flag bit if the lease is active, that is it isn't | |
d13db163 SR |
1787 | * expired or released. This is used to determine if we need |
1788 | * to update the scope information for both v4 and v6 and | |
1789 | * the lease information for v6 when the response | |
0ef9a46e SR |
1790 | * from the DNS code is processed. |
1791 | */ | |
1792 | if (active == ISC_TRUE) { | |
1793 | ddns_cb->flags |= DDNS_ACTIVE_LEASE; | |
1794 | } | |
1795 | ||
b992d7e2 | 1796 | /* No scope implies that DDNS has not been performed for this lease. */ |
98bd7ca0 | 1797 | if (*scope == NULL) |
98bf1607 | 1798 | goto cleanup; |
b992d7e2 | 1799 | |
98311e4b | 1800 | if (ddns_update_style != 2) |
98bf1607 SR |
1801 | goto cleanup; |
1802 | ||
1803 | /* Assume that we are removing both records */ | |
3221151b | 1804 | ddns_cb->flags |= DDNS_UPDATE_ADDR | DDNS_UPDATE_PTR; |
98bf1607 SR |
1805 | |
1806 | /* and that we want to do the add call */ | |
1807 | execute_add = ISC_R_SUCCESS; | |
98311e4b | 1808 | |
b992d7e2 DN |
1809 | /* |
1810 | * Look up stored names. | |
1811 | */ | |
b992d7e2 | 1812 | |
b992d7e2 | 1813 | /* |
98bf1607 SR |
1814 | * Find the fwd name and copy it to the control block. If we don't |
1815 | * have it we can't delete the fwd record but we can still try to | |
1816 | * remove the ptr record and cleanup the lease information if the | |
1817 | * client did the fwd update. | |
b992d7e2 | 1818 | */ |
98bf1607 SR |
1819 | if (!find_bound_string(&ddns_cb->fwd_name, *scope, "ddns-fwd-name")) { |
1820 | /* don't try and delete the A, or do the add */ | |
1821 | ddns_cb->flags &= ~DDNS_UPDATE_ADDR; | |
1822 | execute_add = ISC_R_FAILURE; | |
1823 | ||
1824 | /* Check if client did update */ | |
1825 | if (find_bound_string(&ddns_cb->fwd_name, *scope, | |
1826 | "ddns-client-fqdn")) { | |
1827 | ddns_cb->flags |= DDNS_CLIENT_DID_UPDATE; | |
1828 | } | |
b992d7e2 DN |
1829 | } |
1830 | ||
98bf1607 SR |
1831 | /* |
1832 | * Find the ptr name and copy it to the control block. If we don't | |
1833 | * have it this isn't an interim or rfc3??? record so we can't delete | |
1834 | * the A record using this mechanism but we can delete the ptr record. | |
1835 | * In this case we will attempt to do any requested next step. | |
1836 | */ | |
1837 | memset(&leaseid, 0, sizeof(leaseid)); | |
1838 | if (!find_bound_string (&leaseid, *scope, "ddns-txt")) { | |
1839 | ddns_cb->flags &= ~DDNS_UPDATE_ADDR; | |
1840 | } else { | |
1841 | if (dhcid_fromlease(&ddns_cb->dhcid, &leaseid) != | |
1842 | ISC_R_SUCCESS) { | |
1843 | /* We couldn't convert the dhcid from the lease | |
1844 | * version to the dns version. We can't delete | |
1845 | * the A record but can continue to the ptr | |
1846 | */ | |
1847 | ddns_cb->flags &= ~DDNS_UPDATE_ADDR; | |
1848 | } | |
1849 | data_string_forget(&leaseid, MDL); | |
ee83afae | 1850 | } |
478028e7 | 1851 | |
98bf1607 SR |
1852 | /* |
1853 | * Find the rev name and copy it to the control block. If we don't | |
1854 | * have it we can't get rid of it but we can try to remove the fwd | |
1855 | * pointer if desired. | |
1856 | */ | |
1857 | if (!find_bound_string(&ddns_cb->rev_name, *scope, "ddns-rev-name")) { | |
1858 | ddns_cb->flags &= ~DDNS_UPDATE_PTR; | |
478028e7 | 1859 | } |
98bf1607 SR |
1860 | |
1861 | /* | |
1862 | * If we have a second control block for doing an add | |
1863 | * after the remove finished attach it to our control block. | |
1864 | */ | |
1865 | ddns_cb->next_op = add_ddns_cb; | |
478028e7 | 1866 | |
b992d7e2 | 1867 | /* |
98bf1607 SR |
1868 | * Now that we've collected the information we can try to process it. |
1869 | * If necessary we call an appropriate routine to send a message and | |
1870 | * provide it with an action routine to run on the control block given | |
1871 | * the results of the message. We have three entry points from here, | |
1872 | * one for removing the A record, the next for removing the PTR and | |
1873 | * the third for doing any requested add. | |
b992d7e2 | 1874 | */ |
98bf1607 SR |
1875 | if ((ddns_cb->flags & DDNS_UPDATE_ADDR) != 0) { |
1876 | if (ddns_cb->fwd_name.len != 0) { | |
1877 | ddns_cb->state = DDNS_STATE_REM_FW_YXDHCID; | |
1878 | ddns_cb->cur_func = ddns_fwd_srv_rem1; | |
1879 | ||
87132514 | 1880 | rcode = ddns_modify_fwd(ddns_cb, MDL); |
98bf1607 SR |
1881 | if (rcode == ISC_R_SUCCESS) { |
1882 | ddns_update_lease_ptr(lease, lease6, ddns_cb, | |
beaed73f | 1883 | ddns_cb, MDL); |
d13db163 | 1884 | return (ISC_R_SUCCESS); |
98bf1607 | 1885 | } |
478028e7 | 1886 | |
98bf1607 SR |
1887 | /* |
1888 | * We weren't able to process the request tag the | |
1889 | * add so we won't execute it. | |
1890 | */ | |
1891 | execute_add = ISC_R_FAILURE; | |
1892 | goto cleanup; | |
1893 | } | |
1894 | else { | |
1895 | /*remove info from scope */ | |
1896 | unset(*scope, "ddns-fwd-name"); | |
1897 | unset(*scope, "ddns-txt"); | |
1898 | } | |
1899 | } | |
b992d7e2 | 1900 | |
98bf1607 SR |
1901 | if ((ddns_cb->flags & DDNS_UPDATE_PTR) != 0) { |
1902 | ddns_cb->state = DDNS_STATE_REM_PTR; | |
1903 | ddns_cb->cur_func = ddns_ptr_remove; | |
1904 | ||
1905 | /* | |
1906 | * if execute add isn't success remove the control block so | |
1907 | * it won't be processed when the remove completes. We | |
1908 | * also arrange to clean it up and get rid of it. | |
1909 | */ | |
1910 | if (execute_add != ISC_R_SUCCESS) { | |
1911 | ddns_cb->next_op = NULL; | |
1912 | ddns_fwd_srv_connector(lease, lease6, scope, | |
1913 | add_ddns_cb, execute_add); | |
1914 | add_ddns_cb = NULL; | |
1915 | } | |
1916 | else { | |
d13db163 | 1917 | result = ISC_R_SUCCESS; |
98bf1607 SR |
1918 | } |
1919 | ||
87132514 | 1920 | rcode = ddns_modify_ptr(ddns_cb, MDL); |
98bf1607 | 1921 | if (rcode == ISC_R_SUCCESS) { |
beaed73f SR |
1922 | ddns_update_lease_ptr(lease, lease6, ddns_cb, ddns_cb, |
1923 | MDL); | |
d13db163 | 1924 | return (result); |
98bf1607 SR |
1925 | } |
1926 | ||
1927 | /* We weren't able to process the request tag the | |
1928 | * add so we won't execute it */ | |
1929 | execute_add = ISC_R_FAILURE; | |
1930 | goto cleanup; | |
1931 | } | |
1932 | ||
1933 | cleanup: | |
1934 | /* | |
1935 | * We've gotten here because we didn't need to send a message or | |
1936 | * we failed when trying to do so. We send the additional cb | |
1937 | * off to handle sending and/or cleanup and cleanup anything | |
1938 | * we allocated here. | |
1939 | */ | |
1940 | ddns_fwd_srv_connector(lease, lease6, scope, add_ddns_cb, execute_add); | |
919f1407 SR |
1941 | if (ddns_cb != NULL) |
1942 | ddns_cb_free(ddns_cb, MDL); | |
98bf1607 | 1943 | |
d13db163 | 1944 | return (result); |
b992d7e2 DN |
1945 | } |
1946 | ||
b992d7e2 | 1947 | #endif /* NSUPDATE */ |