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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 | * |
edad9be5 | 7 | * Copyright (c) 2009-2014 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 | 40 | |
d7d9c0c7 SR |
41 | char *ddns_standard_tag = "ddns-dhcid"; |
42 | char *ddns_interim_tag = "ddns-txt"; | |
43 | ||
b992d7e2 DN |
44 | #ifdef NSUPDATE |
45 | ||
98bf1607 SR |
46 | static void ddns_fwd_srv_connector(struct lease *lease, |
47 | struct iasubopt *lease6, | |
48 | struct binding_scope **inscope, | |
49 | dhcp_ddns_cb_t *ddns_cb, | |
50 | isc_result_t eresult); | |
51 | ||
0598e123 TL |
52 | /* DN: No way of checking that there is enough space in a data_string's |
53 | buffer. Be certain to allocate enough! | |
385fcb27 | 54 | TL: This is why the expression evaluation code allocates a *new* |
0598e123 | 55 | data_string. :') */ |
b992d7e2 DN |
56 | static void data_string_append (struct data_string *ds1, |
57 | struct data_string *ds2) | |
58 | { | |
59 | memcpy (ds1 -> buffer -> data + ds1 -> len, | |
60 | ds2 -> data, | |
61 | ds2 -> len); | |
62 | ds1 -> len += ds2 -> len; | |
63 | } | |
64 | ||
b992d7e2 | 65 | |
98bd7ca0 DH |
66 | /* Determine what, if any, forward and reverse updates need to be |
67 | * performed, and carry them through. | |
68 | */ | |
69 | int | |
70 | ddns_updates(struct packet *packet, struct lease *lease, struct lease *old, | |
1d17db44 | 71 | struct iasubopt *lease6, struct iasubopt *old6, |
98bd7ca0 | 72 | struct option_state *options) |
b992d7e2 DN |
73 | { |
74 | unsigned long ddns_ttl = DEFAULT_DDNS_TTL; | |
75 | struct data_string ddns_hostname; | |
76 | struct data_string ddns_domainname; | |
478028e7 | 77 | struct data_string old_ddns_fwd_name; |
b992d7e2 | 78 | struct data_string ddns_fwd_name; |
b992d7e2 | 79 | struct data_string ddns_dhcid; |
98bf1607 | 80 | struct binding_scope **scope = NULL; |
b992d7e2 DN |
81 | struct data_string d1; |
82 | struct option_cache *oc; | |
83 | int s1, s2; | |
84 | int result = 0; | |
478028e7 TL |
85 | int server_updates_a = 1; |
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 | ||
d7d9c0c7 SR |
94 | if ((ddns_update_style != DDNS_UPDATE_STYLE_STANDARD) && |
95 | (ddns_update_style != DDNS_UPDATE_STYLE_INTERIM)) | |
96 | return (0); | |
5fac73d6 | 97 | |
98bf1607 SR |
98 | /* |
99 | * sigh, I want to cancel any previous udpates before we do anything | |
100 | * else but this means we need to deal with the lease vs lease6 | |
101 | * question twice. | |
102 | * If there is a ddns request already outstanding cancel it. | |
103 | */ | |
104 | ||
98bd7ca0 | 105 | if (lease != NULL) { |
98bf1607 | 106 | if ((old != NULL) && (old->ddns_cb != NULL)) { |
87132514 | 107 | ddns_cancel(old->ddns_cb, MDL); |
98bf1607 SR |
108 | old->ddns_cb = NULL; |
109 | } | |
98bd7ca0 | 110 | } else if (lease6 != NULL) { |
98bf1607 | 111 | if ((old6 != NULL) && (old6->ddns_cb != NULL)) { |
87132514 | 112 | ddns_cancel(old6->ddns_cb, MDL); |
98bf1607 SR |
113 | old6->ddns_cb = NULL; |
114 | } | |
6705543f | 115 | } else { |
98bd7ca0 | 116 | log_fatal("Impossible condition at %s:%d.", MDL); |
6705543f | 117 | /* Silence compiler warnings. */ |
98bf1607 SR |
118 | result = 0; |
119 | return(0); | |
120 | } | |
121 | ||
122 | /* allocate our control block */ | |
123 | ddns_cb = ddns_cb_alloc(MDL); | |
124 | if (ddns_cb == NULL) { | |
125 | return(0); | |
126 | } | |
0ef9a46e SR |
127 | /* |
128 | * Assume that we shall update both the A and ptr records and, | |
129 | * as this is an update, set the active flag | |
130 | */ | |
131 | ddns_cb->flags = DDNS_UPDATE_ADDR | DDNS_UPDATE_PTR | | |
132 | DDNS_ACTIVE_LEASE; | |
3221151b SR |
133 | |
134 | /* | |
135 | * For v4 we flag static leases so we don't try | |
136 | * and manipulate the lease later. For v6 we don't | |
137 | * get static leases and don't need to flag them. | |
138 | */ | |
98bf1607 SR |
139 | if (lease != NULL) { |
140 | scope = &(lease->scope); | |
141 | ddns_cb->address = lease->ip_addr; | |
3221151b SR |
142 | if (lease->flags & STATIC_LEASE) |
143 | ddns_cb->flags |= DDNS_STATIC_LEASE; | |
98bf1607 SR |
144 | } else if (lease6 != NULL) { |
145 | scope = &(lease6->scope); | |
146 | memcpy(ddns_cb->address.iabuf, lease6->addr.s6_addr, 16); | |
147 | ddns_cb->address.len = 16; | |
6705543f | 148 | } |
b992d7e2 | 149 | |
98bf1607 | 150 | memset (&d1, 0, sizeof(d1)); |
b992d7e2 DN |
151 | memset (&ddns_hostname, 0, sizeof (ddns_hostname)); |
152 | memset (&ddns_domainname, 0, sizeof (ddns_domainname)); | |
478028e7 | 153 | memset (&old_ddns_fwd_name, 0, sizeof (ddns_fwd_name)); |
b992d7e2 | 154 | memset (&ddns_fwd_name, 0, sizeof (ddns_fwd_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 | ||
a07d99bb TM |
239 | if (buffer_allocate (&ddns_fwd_name.buffer, |
240 | ddns_hostname.len + | |
241 | ddns_domainname.len + 2, MDL)) { | |
98bf1607 | 242 | ddns_fwd_name.data = ddns_fwd_name.buffer->data; |
b992d7e2 | 243 | data_string_append (&ddns_fwd_name, &ddns_hostname); |
98bf1607 | 244 | ddns_fwd_name.buffer->data[ddns_fwd_name.len] = '.'; |
b992d7e2 DN |
245 | ddns_fwd_name.len++; |
246 | data_string_append (&ddns_fwd_name, &ddns_domainname); | |
98bf1607 | 247 | ddns_fwd_name.buffer->data[ddns_fwd_name.len] ='\0'; |
b992d7e2 DN |
248 | ddns_fwd_name.terminated = 1; |
249 | } | |
250 | } | |
478028e7 TL |
251 | client_updates: |
252 | ||
253 | /* See if there's a name already stored on the lease. */ | |
98bd7ca0 | 254 | if (find_bound_string(&old_ddns_fwd_name, *scope, "ddns-fwd-name")) { |
478028e7 TL |
255 | /* If there is, see if it's different. */ |
256 | if (old_ddns_fwd_name.len != ddns_fwd_name.len || | |
257 | memcmp (old_ddns_fwd_name.data, ddns_fwd_name.data, | |
258 | old_ddns_fwd_name.len)) { | |
98bf1607 SR |
259 | /* |
260 | * If the name is different, mark the old record | |
261 | * for deletion and continue getting the new info. | |
262 | */ | |
263 | do_remove = 1; | |
478028e7 TL |
264 | goto in; |
265 | } | |
266 | ||
d7d9c0c7 SR |
267 | #if defined (DDNS_UPDATE_SLOW_TRANSITION) |
268 | /* | |
269 | * If the slow transition code is enabled check to see | |
270 | * if the stored type (standard or interim doesn't | |
271 | * match the type currently in use. If it doesn't | |
272 | * try to remove and replace the DNS record | |
98bd7ca0 | 273 | */ |
d7d9c0c7 SR |
274 | if (((ddns_update_style == DDNS_UPDATE_STYLE_STANDARD) && |
275 | find_bound_string(&ddns_dhcid, *scope, ddns_interim_tag)) || | |
276 | ((ddns_update_style == DDNS_UPDATE_STYLE_INTERIM) && | |
277 | find_bound_string(&ddns_dhcid, *scope, ddns_standard_tag))) { | |
75ab3070 | 278 | data_string_forget(&ddns_dhcid, MDL); |
d7d9c0c7 SR |
279 | do_remove = 1; |
280 | goto in; | |
281 | } | |
282 | #endif | |
283 | ||
ebd0310b TL |
284 | /* See if the administrator wants to do updates even |
285 | in cases where the update already appears to have been | |
286 | done. */ | |
98bd7ca0 DH |
287 | if (!(oc = lookup_option(&server_universe, options, |
288 | SV_UPDATE_OPTIMIZATION)) || | |
289 | evaluate_boolean_option_cache(&ignorep, packet, lease, | |
290 | NULL, packet->options, | |
291 | options, scope, oc, MDL)) { | |
ebd0310b TL |
292 | result = 1; |
293 | goto noerror; | |
294 | } | |
75ab3070 DH |
295 | /* If there's no "ddns-fwd-name" on the lease record, see if |
296 | * there's a ddns-client-fqdn indicating a previous client | |
297 | * update (if it changes, we need to adjust the PTR). | |
298 | */ | |
98bd7ca0 | 299 | } else if (find_bound_string(&old_ddns_fwd_name, *scope, |
75ab3070 | 300 | "ddns-client-fqdn")) { |
98311e4b DH |
301 | /* If the name is not different, no need to update |
302 | the PTR record. */ | |
ee83afae TL |
303 | if (old_ddns_fwd_name.len == ddns_fwd_name.len && |
304 | !memcmp (old_ddns_fwd_name.data, ddns_fwd_name.data, | |
98311e4b | 305 | old_ddns_fwd_name.len) && |
98bd7ca0 DH |
306 | (!(oc = lookup_option(&server_universe, options, |
307 | SV_UPDATE_OPTIMIZATION)) || | |
308 | evaluate_boolean_option_cache(&ignorep, packet, lease, | |
309 | NULL, packet->options, | |
310 | options, scope, oc, MDL))) { | |
478028e7 TL |
311 | goto noerror; |
312 | } | |
313 | } | |
314 | in: | |
315 | ||
d758ad8c TL |
316 | /* If we don't have a name that the client has been assigned, we |
317 | can just skip all this. */ | |
d758ad8c | 318 | |
98bf1607 SR |
319 | if ((!ddns_fwd_name.len) || (ddns_fwd_name.len > 255)) { |
320 | if (ddns_fwd_name.len > 255) { | |
321 | log_error ("client provided fqdn: too long"); | |
322 | } | |
323 | ||
324 | /* If desired do the removals */ | |
325 | if (do_remove != 0) { | |
0ef9a46e | 326 | (void) ddns_removals(lease, lease6, NULL, ISC_TRUE); |
98bf1607 | 327 | } |
98311e4b DH |
328 | goto out; |
329 | } | |
330 | ||
b992d7e2 | 331 | /* |
478028e7 | 332 | * Compute the RR TTL. |
2b58b865 SR |
333 | * |
334 | * We have two ways of computing the TTL. | |
335 | * The old behavior was to allow for the customer to set up | |
336 | * the option or to default things. For v4 this was 1/2 | |
337 | * of the lease time, for v6 this was DEFAULT_DDNS_TTL. | |
338 | * The new behavior continues to allow the customer to set | |
339 | * up an option but the defaults are a little different. | |
340 | * We now use 1/2 of the (preferred) lease time for both | |
341 | * v4 and v6 and cap them at a maximum value. | |
342 | * If the customer chooses to use an experession that references | |
343 | * part of the lease the v6 value will be the default as there | |
344 | * isn't a lease available for v6. | |
478028e7 | 345 | */ |
2b58b865 | 346 | |
478028e7 | 347 | ddns_ttl = DEFAULT_DDNS_TTL; |
2b58b865 SR |
348 | if (lease != NULL) { |
349 | if (lease->ends <= cur_time) { | |
350 | ddns_ttl = 0; | |
351 | } else { | |
352 | ddns_ttl = (lease->ends - cur_time)/2; | |
353 | } | |
354 | } | |
355 | #ifndef USE_OLD_DDNS_TTL | |
356 | else if (lease6 != NULL) { | |
357 | ddns_ttl = lease6->prefer/2; | |
358 | } | |
359 | ||
360 | if (ddns_ttl > MAX_DEFAULT_DDNS_TTL) { | |
361 | ddns_ttl = MAX_DEFAULT_DDNS_TTL; | |
362 | } | |
363 | #endif | |
364 | ||
98bd7ca0 DH |
365 | if ((oc = lookup_option(&server_universe, options, SV_DDNS_TTL))) { |
366 | if (evaluate_option_cache(&d1, packet, lease, NULL, | |
2b58b865 SR |
367 | packet->options, options, |
368 | scope, oc, MDL)) { | |
478028e7 | 369 | if (d1.len == sizeof (u_int32_t)) |
2b58b865 | 370 | ddns_ttl = getULong (d1.data); |
478028e7 TL |
371 | data_string_forget (&d1, MDL); |
372 | } | |
373 | } | |
374 | ||
2b58b865 SR |
375 | ddns_cb->ttl = ddns_ttl; |
376 | ||
478028e7 | 377 | /* |
61d75ea2 | 378 | * Compute the reverse IP name, starting with the domain name. |
b992d7e2 | 379 | */ |
61d75ea2 DH |
380 | oc = lookup_option(&server_universe, options, SV_DDNS_REV_DOMAIN_NAME); |
381 | if (oc) | |
382 | s1 = evaluate_option_cache(&d1, packet, lease, NULL, | |
383 | packet->options, options, | |
384 | scope, oc, MDL); | |
385 | else | |
386 | s1 = 0; | |
98bd7ca0 DH |
387 | |
388 | /* | |
389 | * Figure out the length of the part of the name that depends | |
390 | * on the address. | |
391 | */ | |
98bf1607 | 392 | if (ddns_cb->address.len == 4) { |
61d75ea2 | 393 | char buf[17]; |
98bd7ca0 DH |
394 | /* XXX: WOW this is gross. */ |
395 | rev_name_len = snprintf(buf, sizeof(buf), "%u.%u.%u.%u.", | |
98bf1607 SR |
396 | ddns_cb->address.iabuf[3] & 0xff, |
397 | ddns_cb->address.iabuf[2] & 0xff, | |
398 | ddns_cb->address.iabuf[1] & 0xff, | |
399 | ddns_cb->address.iabuf[0] & 0xff) + 1; | |
61d75ea2 DH |
400 | |
401 | if (s1) { | |
402 | rev_name_len += d1.len; | |
403 | ||
404 | if (rev_name_len > 255) { | |
405 | log_error("ddns_update: Calculated rev domain " | |
406 | "name too long."); | |
407 | s1 = 0; | |
408 | data_string_forget(&d1, MDL); | |
409 | } | |
410 | } | |
98bf1607 | 411 | } else if (ddns_cb->address.len == 16) { |
98bd7ca0 DH |
412 | /* |
413 | * IPv6 reverse names are always the same length, with | |
414 | * 32 hex characters separated by dots. | |
415 | */ | |
61d75ea2 DH |
416 | rev_name_len = sizeof("0.1.2.3.4.5.6.7." |
417 | "8.9.a.b.c.d.e.f." | |
418 | "0.1.2.3.4.5.6.7." | |
419 | "8.9.a.b.c.d.e.f." | |
420 | "ip6.arpa."); | |
421 | ||
422 | /* Set s1 to make sure we gate into updates. */ | |
423 | s1 = 1; | |
6705543f | 424 | } else { |
98bf1607 | 425 | log_fatal("invalid address length %d", ddns_cb->address.len); |
6705543f DH |
426 | /* Silence compiler warnings. */ |
427 | return 0; | |
428 | } | |
98bd7ca0 | 429 | |
61d75ea2 DH |
430 | /* See if we are configured NOT to do reverse ptr updates */ |
431 | if ((oc = lookup_option(&server_universe, options, | |
432 | SV_DO_REVERSE_UPDATES)) && | |
433 | !evaluate_boolean_option_cache(&ignorep, packet, lease, NULL, | |
98bd7ca0 | 434 | packet->options, options, |
61d75ea2 | 435 | scope, oc, MDL)) { |
98bf1607 | 436 | ddns_cb->flags &= ~DDNS_UPDATE_PTR; |
98311e4b DH |
437 | } |
438 | ||
61d75ea2 | 439 | if (s1) { |
a07d99bb TM |
440 | if (buffer_allocate(&ddns_cb->rev_name.buffer, |
441 | rev_name_len, MDL)) { | |
98bf1607 SR |
442 | struct data_string *rname = &ddns_cb->rev_name; |
443 | rname->data = rname->buffer->data; | |
444 | ||
445 | if (ddns_cb->address.len == 4) { | |
446 | rname->len = | |
447 | sprintf((char *)rname->buffer->data, | |
61d75ea2 | 448 | "%u.%u.%u.%u.", |
98bf1607 SR |
449 | ddns_cb->address.iabuf[3] & 0xff, |
450 | ddns_cb->address.iabuf[2] & 0xff, | |
451 | ddns_cb->address.iabuf[1] & 0xff, | |
452 | ddns_cb->address.iabuf[0] & 0xff); | |
61d75ea2 DH |
453 | |
454 | /* | |
455 | * d1.data may be opaque, garbage bytes, from | |
456 | * user (mis)configuration. | |
457 | */ | |
98bf1607 SR |
458 | data_string_append(rname, &d1); |
459 | rname->buffer->data[rname->len] = '\0'; | |
460 | } else if (ddns_cb->address.len == 16) { | |
461 | char *p = (char *)&rname->buffer->data; | |
462 | unsigned char *a = ddns_cb->address.iabuf + 15; | |
98bd7ca0 DH |
463 | for (i=0; i<16; i++) { |
464 | sprintf(p, "%x.%x.", | |
465 | (*a & 0xF), ((*a >> 4) & 0xF)); | |
466 | p += 4; | |
467 | a -= 1; | |
468 | } | |
61d75ea2 | 469 | strcat(p, "ip6.arpa."); |
98bf1607 | 470 | rname->len = strlen((const char *)rname->data); |
98bd7ca0 | 471 | } |
98311e4b | 472 | |
98bf1607 | 473 | rname->terminated = 1; |
b992d7e2 | 474 | } |
98bd7ca0 | 475 | |
61d75ea2 DH |
476 | if (d1.data != NULL) |
477 | data_string_forget(&d1, MDL); | |
b992d7e2 DN |
478 | } |
479 | ||
d7d9c0c7 SR |
480 | /* |
481 | * copy the string now so we can pass it to the dhcid routines | |
482 | * via the ddns_cb pointer | |
483 | */ | |
484 | data_string_copy(&ddns_cb->fwd_name, &ddns_fwd_name, MDL); | |
485 | ||
b992d7e2 | 486 | /* |
478028e7 | 487 | * If we are updating the A record, compute the DHCID value. |
d7d9c0c7 SR |
488 | * We have two options for computing the DHCID value, the older |
489 | * interim version and the newer standard version. The interim | |
490 | * has some issues but is left as is to avoid compatibility issues. | |
491 | * | |
492 | * We select the type of DHCID to construct and the information to | |
493 | * use for the digest based on 4701 section 3.3 | |
b992d7e2 | 494 | */ |
98bf1607 | 495 | if ((ddns_cb->flags & DDNS_UPDATE_ADDR) != 0) { |
d7d9c0c7 SR |
496 | int ddns_type; |
497 | int ddns_len; | |
498 | if (ddns_update_style == DDNS_UPDATE_STYLE_STANDARD) { | |
499 | /* The standard style */ | |
500 | ddns_cb->lease_tag = ddns_standard_tag; | |
501 | ddns_cb->dhcid_class = dns_rdatatype_dhcid; | |
502 | ddns_type = 1; | |
503 | ddns_len = 4; | |
504 | } else { | |
505 | /* The older interim style */ | |
506 | ddns_cb->lease_tag = ddns_interim_tag; | |
507 | ddns_cb->dhcid_class = dns_rdatatype_txt; | |
508 | /* for backwards compatibility */ | |
509 | ddns_type = DHO_DHCP_CLIENT_IDENTIFIER; | |
510 | /* IAID incorrectly included */ | |
511 | ddns_len = 0; | |
512 | } | |
513 | ||
514 | ||
515 | if (lease6 != NULL) { | |
516 | if (lease6->ia->iaid_duid.len < ddns_len) | |
517 | goto badfqdn; | |
518 | result = get_dhcid(ddns_cb, 2, | |
519 | lease6->ia->iaid_duid.data + ddns_len, | |
520 | lease6->ia->iaid_duid.len - ddns_len); | |
521 | } else if ((lease != NULL) && | |
522 | (lease->uid != NULL) && | |
523 | (lease->uid_len != 0)) { | |
524 | /* If this is standard check for an RFC 4361 | |
525 | * compliant client identifier | |
526 | */ | |
527 | if ((ddns_update_style == DDNS_UPDATE_STYLE_STANDARD) && | |
528 | (lease->uid[0] == 255)) { | |
529 | if (lease->uid_len < 5) | |
530 | goto badfqdn; | |
531 | result = get_dhcid(ddns_cb, 2, | |
532 | lease->uid + 5, | |
533 | lease->uid_len - 5); | |
534 | } else { | |
535 | result = get_dhcid(ddns_cb, ddns_type, | |
536 | lease->uid, | |
537 | lease->uid_len); | |
538 | } | |
539 | } else if (lease != NULL) | |
540 | result = get_dhcid(ddns_cb, 0, | |
541 | lease->hardware_addr.hbuf, | |
542 | lease->hardware_addr.hlen); | |
98bd7ca0 DH |
543 | else |
544 | log_fatal("Impossible condition at %s:%d.", MDL); | |
545 | ||
d758ad8c TL |
546 | if (!result) |
547 | goto badfqdn; | |
478028e7 | 548 | } |
b992d7e2 | 549 | |
b992d7e2 DN |
550 | /* |
551 | * Perform updates. | |
552 | */ | |
3004bebf | 553 | |
b45889b4 | 554 | if (ddns_cb->flags & DDNS_UPDATE_ADDR) { |
98bd7ca0 | 555 | oc = lookup_option(&server_universe, options, |
3004bebf | 556 | SV_DDNS_CONFLICT_DETECT); |
98bf1607 SR |
557 | if (oc && |
558 | !evaluate_boolean_option_cache(&ignorep, packet, lease, | |
559 | NULL, packet->options, | |
560 | options, scope, oc, MDL)) | |
561 | ddns_cb->flags |= DDNS_CONFLICT_OVERRIDE; | |
3004bebf | 562 | |
3004bebf | 563 | } |
75ab3070 | 564 | |
98bf1607 SR |
565 | /* |
566 | * Previously if we failed during the removal operations | |
567 | * we skipped the fqdn option processing. I'm not sure | |
568 | * if we want to continue with that if we fail before sending | |
569 | * the ddns messages. Currently we don't. | |
570 | */ | |
571 | if (do_remove) { | |
dd9237c3 TM |
572 | /* |
573 | * We should log a more specific error closer to the actual | |
574 | * error if we want one. ddns_removal failure not logged here. | |
575 | */ | |
576 | (void) ddns_removals(lease, lease6, ddns_cb, ISC_TRUE); | |
b992d7e2 | 577 | } |
98bf1607 SR |
578 | else { |
579 | ddns_fwd_srv_connector(lease, lease6, scope, ddns_cb, | |
580 | ISC_R_SUCCESS); | |
b992d7e2 | 581 | } |
98bf1607 | 582 | ddns_cb = NULL; |
b992d7e2 | 583 | |
478028e7 | 584 | noerror: |
1ba87b37 EH |
585 | /* |
586 | * If fqdn-reply option is disabled in dhcpd.conf, then don't | |
587 | * send the client an FQDN option at all, even if one was requested. | |
588 | * (WinXP clients allegedly misbehave if the option is present, | |
589 | * refusing to handle PTR updates themselves). | |
590 | */ | |
98bd7ca0 DH |
591 | if ((oc = lookup_option (&server_universe, options, SV_FQDN_REPLY)) && |
592 | !evaluate_boolean_option_cache(&ignorep, packet, lease, NULL, | |
593 | packet->options, options, | |
594 | scope, oc, MDL)) { | |
1ba87b37 EH |
595 | goto badfqdn; |
596 | ||
a396d25f DH |
597 | /* If we're ignoring client updates, then we tell a sort of 'white |
598 | * lie'. We've already updated the name the server wants (per the | |
599 | * config written by the server admin). Now let the client do as | |
600 | * it pleases with the name they supplied (if any). | |
601 | * | |
602 | * We only form an FQDN option this way if the client supplied an | |
603 | * FQDN option that had FQDN_SERVER_UPDATE set false. | |
604 | */ | |
1ba87b37 | 605 | } else if (client_ignorep && |
a396d25f DH |
606 | (oc = lookup_option(&fqdn_universe, packet->options, |
607 | FQDN_SERVER_UPDATE)) && | |
608 | !evaluate_boolean_option_cache(&ignorep, packet, lease, NULL, | |
98bd7ca0 DH |
609 | packet->options, options, |
610 | scope, oc, MDL)) { | |
a396d25f DH |
611 | oc = lookup_option(&fqdn_universe, packet->options, FQDN_FQDN); |
612 | if (oc && evaluate_option_cache(&d1, packet, lease, NULL, | |
98bd7ca0 DH |
613 | packet->options, options, |
614 | scope, oc, MDL)) { | |
a396d25f DH |
615 | if (d1.len == 0 || |
616 | !buffer_allocate(&bp, d1.len + 5, MDL)) | |
617 | goto badfqdn; | |
618 | ||
619 | /* Server pretends it is not updating. */ | |
620 | bp->data[0] = 0; | |
98bd7ca0 | 621 | if (!save_option_buffer(&fqdn_universe, options, |
a396d25f | 622 | bp, &bp->data[0], 1, |
8f4c32a1 | 623 | FQDN_SERVER_UPDATE, 0)) |
a396d25f DH |
624 | goto badfqdn; |
625 | ||
626 | /* Client is encouraged to update. */ | |
627 | bp->data[1] = 0; | |
98bd7ca0 | 628 | if (!save_option_buffer(&fqdn_universe, options, |
a396d25f | 629 | bp, &bp->data[1], 1, |
8f4c32a1 | 630 | FQDN_NO_CLIENT_UPDATE, 0)) |
a396d25f DH |
631 | goto badfqdn; |
632 | ||
633 | /* Use the encoding of client's FQDN option. */ | |
634 | oc = lookup_option(&fqdn_universe, packet->options, | |
635 | FQDN_ENCODED); | |
98bd7ca0 DH |
636 | if (oc && |
637 | evaluate_boolean_option_cache(&ignorep, packet, | |
638 | lease, NULL, | |
639 | packet->options, | |
640 | options, scope, | |
641 | oc, MDL)) | |
a396d25f DH |
642 | bp->data[2] = 1; /* FQDN is encoded. */ |
643 | else | |
644 | bp->data[2] = 0; /* FQDN is not encoded. */ | |
645 | ||
98bd7ca0 | 646 | if (!save_option_buffer(&fqdn_universe, options, |
a396d25f | 647 | bp, &bp->data[2], 1, |
8f4c32a1 | 648 | FQDN_ENCODED, 0)) |
a396d25f DH |
649 | goto badfqdn; |
650 | ||
651 | /* Current FQDN drafts indicate 255 is mandatory. */ | |
652 | bp->data[3] = 255; | |
98bd7ca0 | 653 | if (!save_option_buffer(&fqdn_universe, options, |
a396d25f | 654 | bp, &bp->data[3], 1, |
8f4c32a1 | 655 | FQDN_RCODE1, 0)) |
a396d25f DH |
656 | goto badfqdn; |
657 | ||
658 | bp->data[4] = 255; | |
98bd7ca0 | 659 | if (!save_option_buffer(&fqdn_universe, options, |
a396d25f | 660 | bp, &bp->data[4], 1, |
8f4c32a1 | 661 | FQDN_RCODE2, 0)) |
a396d25f DH |
662 | goto badfqdn; |
663 | ||
664 | /* Copy in the FQDN supplied by the client. Note well | |
665 | * that the format of this option in the cache is going | |
666 | * to be in text format. If the fqdn supplied by the | |
667 | * client is encoded, it is decoded into the option | |
668 | * cache when parsed out of the packet. It will be | |
669 | * re-encoded when the option is assembled to be | |
670 | * transmitted if the client elects that encoding. | |
671 | */ | |
672 | memcpy(&bp->data[5], d1.data, d1.len); | |
98bd7ca0 | 673 | if (!save_option_buffer(&fqdn_universe, options, |
928618dd | 674 | bp, &bp->data[5], d1.len, |
8f4c32a1 | 675 | FQDN_FQDN, 0)) |
a396d25f DH |
676 | goto badfqdn; |
677 | ||
678 | data_string_forget(&d1, MDL); | |
679 | } | |
680 | /* Set up the outgoing FQDN option if there was an incoming | |
681 | * FQDN option. If there's a valid FQDN option, there MUST | |
682 | * be an FQDN_SERVER_UPDATES suboption, it's part of the fixed | |
683 | * length head of the option contents, so we test the latter | |
684 | * to detect the presence of the former. | |
685 | */ | |
686 | } else if ((oc = lookup_option(&fqdn_universe, packet->options, | |
687 | FQDN_ENCODED)) && | |
688 | buffer_allocate(&bp, ddns_fwd_name.len + 5, MDL)) { | |
478028e7 | 689 | bp -> data [0] = server_updates_a; |
98bd7ca0 DH |
690 | if (!save_option_buffer(&fqdn_universe, options, |
691 | bp, &bp->data [0], 1, | |
692 | FQDN_SERVER_UPDATE, 0)) | |
478028e7 TL |
693 | goto badfqdn; |
694 | bp -> data [1] = server_updates_a; | |
98bd7ca0 DH |
695 | if (!save_option_buffer(&fqdn_universe, options, |
696 | bp, &bp->data [1], 1, | |
f7fdb216 | 697 | FQDN_NO_CLIENT_UPDATE, 0)) |
478028e7 | 698 | goto badfqdn; |
a396d25f | 699 | |
478028e7 | 700 | /* Do the same encoding the client did. */ |
a396d25f DH |
701 | if (evaluate_boolean_option_cache(&ignorep, packet, lease, |
702 | NULL, packet->options, | |
98bd7ca0 | 703 | options, scope, oc, MDL)) |
478028e7 TL |
704 | bp -> data [2] = 1; |
705 | else | |
706 | bp -> data [2] = 0; | |
98bd7ca0 DH |
707 | if (!save_option_buffer(&fqdn_universe, options, |
708 | bp, &bp->data [2], 1, | |
709 | FQDN_ENCODED, 0)) | |
478028e7 | 710 | goto badfqdn; |
98bf1607 | 711 | bp -> data [3] = 255;//isc_rcode_to_ns (rcode1); |
98bd7ca0 DH |
712 | if (!save_option_buffer(&fqdn_universe, options, |
713 | bp, &bp->data [3], 1, | |
714 | FQDN_RCODE1, 0)) | |
478028e7 | 715 | goto badfqdn; |
98bf1607 | 716 | bp -> data [4] = 255;//isc_rcode_to_ns (rcode2); |
98bd7ca0 DH |
717 | if (!save_option_buffer(&fqdn_universe, options, |
718 | bp, &bp->data [4], 1, | |
719 | FQDN_RCODE2, 0)) | |
478028e7 TL |
720 | goto badfqdn; |
721 | if (ddns_fwd_name.len) { | |
722 | memcpy (&bp -> data [5], | |
723 | ddns_fwd_name.data, ddns_fwd_name.len); | |
98bd7ca0 DH |
724 | if (!save_option_buffer(&fqdn_universe, options, |
725 | bp, &bp->data [5], | |
478028e7 | 726 | ddns_fwd_name.len, |
f7fdb216 | 727 | FQDN_FQDN, 0)) |
478028e7 TL |
728 | goto badfqdn; |
729 | } | |
b992d7e2 DN |
730 | } |
731 | ||
478028e7 TL |
732 | badfqdn: |
733 | out: | |
b992d7e2 DN |
734 | /* |
735 | * Final cleanup. | |
736 | */ | |
98bf1607 SR |
737 | if (ddns_cb != NULL) { |
738 | ddns_cb_free(ddns_cb, MDL); | |
739 | } | |
740 | ||
a396d25f DH |
741 | data_string_forget(&d1, MDL); |
742 | data_string_forget(&ddns_hostname, MDL); | |
743 | data_string_forget(&ddns_domainname, MDL); | |
744 | data_string_forget(&old_ddns_fwd_name, MDL); | |
745 | data_string_forget(&ddns_fwd_name, MDL); | |
c3993513 | 746 | if (bp) |
a396d25f | 747 | buffer_dereference(&bp, MDL); |
b992d7e2 | 748 | |
478028e7 | 749 | return result; |
b992d7e2 DN |
750 | } |
751 | ||
d13db163 | 752 | /*%< |
98bf1607 SR |
753 | * Utility function to update text strings within a lease. |
754 | * | |
755 | * The first issue is to find the proper scope. Sometimes we shall be | |
756 | * called with a pointer to the scope in other cases we need to find | |
757 | * the proper lease and then get the scope. Once we have the scope we update | |
758 | * the proper strings, as indicated by the state value in the control block. | |
759 | * Lastly, if we needed to find the scope we write it out, if we used a | |
760 | * scope that was passed as an argument we don't write it, assuming that | |
761 | * our caller (or his ...) will do the write. | |
d13db163 SR |
762 | * |
763 | *\li ddns_cb - the control block for the DDNS request | |
764 | * | |
765 | *\li inscope - a pointer to the scope to update. This may be NULL | |
766 | * in which case we use the control block to find the lease and | |
767 | * then the scope. | |
768 | * | |
769 | * Returns | |
770 | *\li ISC_R_SUCCESS | |
771 | * | |
772 | *\li ISC_R_FAILURE - The routine was unable to find an expected scope. | |
773 | * In some cases (static and inactive leases) we don't expect a scope | |
774 | * and return success. | |
98bf1607 SR |
775 | */ |
776 | ||
777 | isc_result_t | |
778 | ddns_update_lease_text(dhcp_ddns_cb_t *ddns_cb, | |
779 | struct binding_scope **inscope) | |
780 | { | |
781 | struct binding_scope **scope = NULL; | |
782 | struct lease *lease = NULL; | |
783 | struct iasubopt *lease6 = NULL; | |
784 | struct ipv6_pool *pool = NULL; | |
785 | struct in6_addr addr; | |
786 | struct data_string lease_dhcid; | |
787 | ||
3221151b SR |
788 | /* |
789 | * If the lease was static (for a fixed address) | |
790 | * we don't need to do any work. | |
791 | */ | |
792 | if (ddns_cb->flags & DDNS_STATIC_LEASE) | |
793 | return (ISC_R_SUCCESS); | |
794 | ||
0ef9a46e SR |
795 | /* |
796 | * If we are processing an expired or released v6 lease | |
d13db163 SR |
797 | * or some types of v4 leases we don't actually have a |
798 | * scope to update | |
0ef9a46e | 799 | */ |
d13db163 | 800 | if ((ddns_cb->flags & DDNS_ACTIVE_LEASE) == 0) |
0ef9a46e | 801 | return (ISC_R_SUCCESS); |
0ef9a46e | 802 | |
98bf1607 SR |
803 | if (inscope != NULL) { |
804 | scope = inscope; | |
805 | } else if (ddns_cb->address.len == 4) { | |
806 | if (find_lease_by_ip_addr(&lease, ddns_cb->address, MDL) != 0){ | |
807 | scope = &(lease->scope); | |
808 | } | |
809 | } else if (ddns_cb->address.len == 16) { | |
810 | memcpy(&addr, &ddns_cb->address.iabuf, 16); | |
811 | if ((find_ipv6_pool(&pool, D6O_IA_TA, &addr) == | |
812 | ISC_R_SUCCESS) || | |
813 | (find_ipv6_pool(&pool, D6O_IA_NA, &addr) == | |
814 | ISC_R_SUCCESS)) { | |
815 | if (iasubopt_hash_lookup(&lease6, pool->leases, | |
816 | &addr, 16, MDL)) { | |
817 | scope = &(lease6->scope); | |
818 | } | |
819 | ipv6_pool_dereference(&pool, MDL); | |
820 | } | |
821 | } else { | |
822 | log_fatal("Impossible condition at %s:%d.", MDL); | |
823 | } | |
824 | ||
825 | if (scope == NULL) { | |
826 | /* If necessary get rid of the lease */ | |
827 | if (lease) { | |
828 | lease_dereference(&lease, MDL); | |
829 | } | |
830 | else if (lease6) { | |
831 | iasubopt_dereference(&lease6, MDL); | |
832 | } | |
833 | ||
834 | return(ISC_R_FAILURE); | |
835 | } | |
836 | ||
837 | /* We now have a scope and can proceed to update it */ | |
838 | switch(ddns_cb->state) { | |
839 | case DDNS_STATE_REM_PTR: | |
840 | unset(*scope, "ddns-rev-name"); | |
841 | if ((ddns_cb->flags & DDNS_CLIENT_DID_UPDATE) != 0) { | |
842 | unset(*scope, "ddns-client-fqdn"); | |
843 | } | |
844 | break; | |
845 | ||
846 | case DDNS_STATE_ADD_PTR: | |
847 | case DDNS_STATE_CLEANUP: | |
848 | bind_ds_value(scope, "ddns-rev-name", &ddns_cb->rev_name); | |
849 | if ((ddns_cb->flags & DDNS_UPDATE_ADDR) == 0) { | |
850 | bind_ds_value(scope, "ddns-client-fqdn", | |
851 | &ddns_cb->fwd_name); | |
852 | } | |
853 | break; | |
854 | ||
855 | case DDNS_STATE_ADD_FW_YXDHCID: | |
856 | case DDNS_STATE_ADD_FW_NXDOMAIN: | |
857 | bind_ds_value(scope, "ddns-fwd-name", &ddns_cb->fwd_name); | |
858 | ||
d7d9c0c7 SR |
859 | if (ddns_cb->lease_tag == ddns_standard_tag) { |
860 | bind_ds_value(scope, ddns_standard_tag, &ddns_cb->dhcid); | |
861 | } else { | |
862 | /* convert from dns version to lease version of dhcid */ | |
863 | memset(&lease_dhcid, 0, sizeof(lease_dhcid)); | |
864 | dhcid_tolease(&ddns_cb->dhcid, &lease_dhcid); | |
865 | bind_ds_value(scope, ddns_interim_tag, &lease_dhcid); | |
866 | data_string_forget(&lease_dhcid, MDL); | |
867 | } | |
98bf1607 SR |
868 | break; |
869 | ||
870 | case DDNS_STATE_REM_FW_NXRR: | |
871 | case DDNS_STATE_REM_FW_YXDHCID: | |
872 | unset(*scope, "ddns-fwd-name"); | |
d7d9c0c7 | 873 | unset(*scope, ddns_cb->lease_tag); |
98bf1607 SR |
874 | break; |
875 | } | |
876 | ||
877 | /* If necessary write it out and get rid of the lease */ | |
878 | if (lease) { | |
879 | write_lease(lease); | |
880 | lease_dereference(&lease, MDL); | |
881 | } else if (lease6) { | |
882 | write_ia(lease6->ia); | |
883 | iasubopt_dereference(&lease6, MDL); | |
884 | } | |
885 | ||
886 | return(ISC_R_SUCCESS); | |
887 | } | |
888 | ||
beaed73f SR |
889 | /* |
890 | * This function should be called when update_lease_ptr function fails. | |
891 | * It does inform user about the condition, provides some hints how to | |
892 | * resolve this and dies gracefully. This can happend in at least three | |
893 | * cases (all are configuration mistakes): | |
894 | * a) IPv4: user have duplicate fixed-address entries (the same | |
895 | * address is defined twice). We may have found wrong lease. | |
896 | * b) IPv6: user have overlapping pools (we tried to find | |
897 | * a lease in a wrong pool) | |
898 | * c) IPv6: user have duplicate fixed-address6 entires (the same | |
899 | * address is defined twice). We may have found wrong lease. | |
900 | * | |
901 | * Comment: while it would be possible to recover from both cases | |
902 | * by forcibly searching for leases in *all* following pools, that would | |
903 | * only hide the real problem - a misconfiguration. Proper solution | |
904 | * is to log the problem, die and let the user fix his config file. | |
905 | */ | |
906 | void | |
907 | update_lease_failed(struct lease *lease, | |
908 | struct iasubopt *lease6, | |
909 | dhcp_ddns_cb_t *ddns_cb, | |
910 | dhcp_ddns_cb_t *ddns_cb_set, | |
911 | const char * file, int line) | |
912 | { | |
913 | char lease_address[MAX_ADDRESS_STRING_LEN + 64]; | |
914 | char reason[128]; /* likely reason */ | |
915 | ||
916 | sprintf(reason, "unknown"); | |
917 | sprintf(lease_address, "unknown"); | |
918 | ||
3221151b SR |
919 | /* |
920 | * let's pretend that everything is ok, so we can continue for | |
921 | * information gathering purposes | |
922 | */ | |
beaed73f SR |
923 | |
924 | if (ddns_cb != NULL) { | |
925 | strncpy(lease_address, piaddr(ddns_cb->address), | |
926 | MAX_ADDRESS_STRING_LEN); | |
927 | ||
928 | if (ddns_cb->address.len == 4) { | |
929 | sprintf(reason, "duplicate IPv4 fixed-address entry"); | |
930 | } else if (ddns_cb->address.len == 16) { | |
931 | sprintf(reason, "duplicate IPv6 fixed-address6 entry " | |
932 | "or overlapping pools"); | |
933 | } else { | |
934 | /* | |
935 | * Should not happen. We have non-IPv4, non-IPv6 | |
936 | * address. Something is very wrong here. | |
937 | */ | |
938 | sprintf(reason, "corrupted ddns_cb structure (address " | |
939 | "length is %d)", ddns_cb->address.len); | |
940 | } | |
941 | } | |
942 | ||
943 | log_error("Failed to properly update internal lease structure with " | |
944 | "DDNS"); | |
945 | log_error("control block structures. Tried to update lease for" | |
946 | "%s address, ddns_cb=%p.", lease_address, ddns_cb); | |
947 | ||
948 | log_error("%s", ""); | |
949 | log_error("This condition can occur, if DHCP server configuration is " | |
950 | "inconsistent."); | |
951 | log_error("In particular, please do check that your configuration:"); | |
952 | log_error("a) does not have overlapping pools (especially containing"); | |
953 | log_error(" %s address).", lease_address); | |
954 | log_error("b) there are no duplicate fixed-address or fixed-address6"); | |
955 | log_error("entries for the %s address.", lease_address); | |
956 | log_error("%s", ""); | |
957 | log_error("Possible reason for this failure: %s", reason); | |
958 | ||
959 | log_fatal("%s(%d): Failed to update lease database with DDNS info for " | |
960 | "address %s. Lease database inconsistent. Unable to recover." | |
961 | " Terminating.", file, line, lease_address); | |
962 | } | |
963 | ||
964 | /* | |
965 | * utility function to update found lease. It does extra checks | |
966 | * that we are indeed updating the right lease. It may happen | |
967 | * that user have duplicate fixed-address entries, so we attempt | |
968 | * to update wrong lease. See also safe_lease6_update. | |
969 | */ | |
970 | ||
971 | void | |
972 | safe_lease_update(struct lease *lease, | |
beaed73f SR |
973 | dhcp_ddns_cb_t *oldcb, |
974 | dhcp_ddns_cb_t *newcb, | |
975 | const char *file, int line) | |
976 | { | |
3221151b SR |
977 | if (lease == NULL) { |
978 | /* should never get here */ | |
979 | log_fatal("Impossible condition at %s:%d (called from %s:%d).", | |
980 | MDL, file, line); | |
981 | } | |
beaed73f | 982 | |
3221151b SR |
983 | if ( (lease->ddns_cb == NULL) && (newcb == NULL) ) { |
984 | /* | |
985 | * Trying to clean up pointer that is already null. We | |
986 | * are most likely trying to update wrong lease here. | |
987 | */ | |
beaed73f | 988 | |
3221151b SR |
989 | /* |
990 | * Previously this error message popped out during | |
991 | * DNS update for fixed leases. As we no longer | |
992 | * try to update the lease for a fixed (static) lease | |
993 | * this should not be a problem. | |
994 | */ | |
995 | log_error("%s(%d): Invalid lease update. Tried to " | |
996 | "clear already NULL DDNS control block " | |
997 | "pointer for lease %s.", | |
998 | file, line, piaddr(lease->ip_addr) ); | |
beaed73f SR |
999 | |
1000 | #if defined (DNS_UPDATES_MEMORY_CHECKS) | |
3221151b | 1001 | update_lease_failed(lease, NULL, oldcb, newcb, file, line); |
beaed73f | 1002 | #endif |
3221151b SR |
1003 | /* |
1004 | * May not reach this: update_lease_failed calls | |
1005 | * log_fatal. | |
1006 | */ | |
1007 | return; | |
1008 | } | |
beaed73f | 1009 | |
3221151b SR |
1010 | if ( (lease->ddns_cb != NULL) && (lease->ddns_cb != oldcb) ) { |
1011 | /* | |
1012 | * There is existing cb structure, but it differs from | |
1013 | * what we expected to see there. Most likely we are | |
1014 | * trying to update wrong lease. | |
1015 | */ | |
1016 | log_error("%s(%d): Failed to update internal lease " | |
1017 | "structure with DDNS control block. Existing" | |
1018 | " ddns_cb structure does not match " | |
1019 | "expectations.IPv4=%s, old ddns_cb=%p, tried" | |
1020 | "to update to new ddns_cb=%p", file, line, | |
1021 | piaddr(lease->ip_addr), oldcb, newcb); | |
beaed73f SR |
1022 | |
1023 | #if defined (DNS_UPDATES_MEMORY_CHECKS) | |
3221151b | 1024 | update_lease_failed(lease, NULL, oldcb, newcb, file, line); |
beaed73f | 1025 | #endif |
3221151b SR |
1026 | /* |
1027 | * May not reach this: update_lease_failed calls | |
1028 | * log_fatal. | |
1029 | */ | |
1030 | return; | |
1031 | } | |
beaed73f | 1032 | |
3221151b SR |
1033 | /* additional IPv4 specific checks may be added here */ |
1034 | ||
1035 | /* update the lease */ | |
1036 | lease->ddns_cb = newcb; | |
1037 | } | |
1038 | ||
1039 | void | |
1040 | safe_lease6_update(struct iasubopt *lease6, | |
1041 | dhcp_ddns_cb_t *oldcb, | |
1042 | dhcp_ddns_cb_t *newcb, | |
1043 | const char *file, int line) | |
1044 | { | |
1045 | char addrbuf[MAX_ADDRESS_STRING_LEN]; | |
1046 | ||
1047 | if (lease6 == NULL) { | |
1048 | /* should never get here */ | |
1049 | log_fatal("Impossible condition at %s:%d (called from %s:%d).", | |
1050 | MDL, file, line); | |
1051 | } | |
1052 | ||
1053 | if ( (lease6->ddns_cb == NULL) && (newcb == NULL) ) { | |
1054 | inet_ntop(AF_INET6, &lease6->addr, addrbuf, | |
1055 | MAX_ADDRESS_STRING_LEN); | |
1056 | /* | |
1057 | * Trying to clean up pointer that is already null. We | |
1058 | * are most likely trying to update wrong lease here. | |
1059 | */ | |
1060 | log_error("%s(%d): Failed to update internal lease " | |
1061 | "structure. Tried to clear already NULL " | |
1062 | "DDNS control block pointer for lease %s.", | |
1063 | file, line, addrbuf); | |
beaed73f SR |
1064 | |
1065 | #if defined (DNS_UPDATES_MEMORY_CHECKS) | |
3221151b | 1066 | update_lease_failed(NULL, lease6, oldcb, newcb, file, line); |
beaed73f SR |
1067 | #endif |
1068 | ||
3221151b SR |
1069 | /* |
1070 | * May not reach this: update_lease_failed calls | |
1071 | * log_fatal. | |
1072 | */ | |
1073 | return; | |
1074 | } | |
beaed73f | 1075 | |
3221151b SR |
1076 | if ( (lease6->ddns_cb != NULL) && (lease6->ddns_cb != oldcb) ) { |
1077 | /* | |
1078 | * there is existing cb structure, but it differs from | |
1079 | * what we expected to see there. Most likely we are | |
1080 | * trying to update wrong lease. | |
1081 | */ | |
1082 | inet_ntop(AF_INET6, &lease6->addr, addrbuf, | |
1083 | MAX_ADDRESS_STRING_LEN); | |
beaed73f | 1084 | |
3221151b SR |
1085 | log_error("%s(%d): Failed to update internal lease " |
1086 | "structure with DDNS control block. Existing" | |
1087 | " ddns_cb structure does not match " | |
1088 | "expectations.IPv6=%s, old ddns_cb=%p, tried" | |
1089 | "to update to new ddns_cb=%p", file, line, | |
1090 | addrbuf, oldcb, newcb); | |
beaed73f SR |
1091 | |
1092 | #if defined (DNS_UPDATES_MEMORY_CHECKS) | |
3221151b | 1093 | update_lease_failed(NULL, lease6, oldcb, newcb, file, line); |
beaed73f | 1094 | #endif |
3221151b SR |
1095 | /* |
1096 | * May not reach this: update_lease_failed calls | |
1097 | * log_fatal. | |
1098 | */ | |
1099 | return; | |
beaed73f | 1100 | } |
3221151b SR |
1101 | /* additional IPv6 specific checks may be added here */ |
1102 | ||
1103 | /* update the lease */ | |
1104 | lease6->ddns_cb = newcb; | |
beaed73f SR |
1105 | } |
1106 | ||
98bf1607 SR |
1107 | /* |
1108 | * Utility function to update the pointer to the DDNS control block | |
1109 | * in a lease. | |
1110 | * SUCCESS - able to update the pointer | |
1111 | * FAILURE - lease didn't exist or sanity checks failed | |
1112 | * lease and lease6 may be empty in which case we attempt to find | |
1113 | * the lease from the ddns_cb information. | |
1114 | * ddns_cb is the control block to use if a lookup is necessary | |
1115 | * ddns_cb_set is the pointer to insert into the lease and may be NULL | |
1116 | * The last two arguments may look odd as they will be the same much of the | |
1117 | * time, but I need an argument to tell me if I'm setting or clearing in | |
1118 | * addition to the address information from the cb to look up the lease. | |
1119 | * using the same value twice allows me more flexibility. | |
1120 | */ | |
1121 | ||
1122 | isc_result_t | |
1123 | ddns_update_lease_ptr(struct lease *lease, | |
1124 | struct iasubopt *lease6, | |
1125 | dhcp_ddns_cb_t *ddns_cb, | |
beaed73f SR |
1126 | dhcp_ddns_cb_t *ddns_cb_set, |
1127 | const char * file, int line) | |
98bf1607 | 1128 | { |
beaed73f | 1129 | char ddns_address[MAX_ADDRESS_STRING_LEN]; |
3221151b | 1130 | sprintf(ddns_address, "unknown"); |
0f750c4f SR |
1131 | if (ddns_cb == NULL) { |
1132 | log_info("%s(%d): No control block for lease update", | |
1133 | file, line); | |
1134 | return (ISC_R_FAILURE); | |
1135 | } | |
1136 | else { | |
36e2c224 | 1137 | strcpy(ddns_address, piaddr(ddns_cb->address)); |
beaed73f SR |
1138 | } |
1139 | #if defined (DEBUG_DNS_UPDATES) | |
1140 | log_info("%s(%d): Updating lease_ptr for ddns_cp=%p (addr=%s)", | |
1141 | file, line, ddns_cb, ddns_address ); | |
1142 | #endif | |
1143 | ||
3221151b SR |
1144 | /* |
1145 | * If the lease was static (for a fixed address) | |
1146 | * we don't need to do any work. | |
1147 | */ | |
1148 | if (ddns_cb->flags & DDNS_STATIC_LEASE) { | |
1149 | #if defined (DEBUG_DNS_UPDATES) | |
1150 | log_info("lease is static, returning"); | |
1151 | #endif | |
1152 | return (ISC_R_SUCCESS); | |
1153 | } | |
1154 | ||
0ef9a46e SR |
1155 | /* |
1156 | * If we are processing an expired or released v6 lease | |
d13db163 | 1157 | * we don't actually have a lease to update |
0ef9a46e SR |
1158 | */ |
1159 | if ((ddns_cb->address.len == 16) && | |
1160 | ((ddns_cb->flags & DDNS_ACTIVE_LEASE) == 0)) { | |
1161 | return (ISC_R_SUCCESS); | |
1162 | } | |
1163 | ||
98bf1607 | 1164 | if (lease != NULL) { |
3221151b | 1165 | safe_lease_update(lease, ddns_cb, ddns_cb_set, |
beaed73f | 1166 | file, line); |
98bf1607 | 1167 | } else if (lease6 != NULL) { |
3221151b | 1168 | safe_lease6_update(lease6, ddns_cb, ddns_cb_set, |
beaed73f | 1169 | file, line); |
98bf1607 SR |
1170 | } else if (ddns_cb->address.len == 4) { |
1171 | struct lease *find_lease = NULL; | |
1172 | if (find_lease_by_ip_addr(&find_lease, | |
1173 | ddns_cb->address, MDL) != 0) { | |
beaed73f SR |
1174 | #if defined (DEBUG_DNS_UPDATES) |
1175 | log_info("%s(%d): find_lease_by_ip_addr(%s) successful:" | |
1176 | "lease=%p", file, line, ddns_address, | |
1177 | find_lease); | |
1178 | #endif | |
1179 | ||
3221151b | 1180 | safe_lease_update(find_lease, ddns_cb, |
beaed73f | 1181 | ddns_cb_set, file, line); |
98bf1607 SR |
1182 | lease_dereference(&find_lease, MDL); |
1183 | } | |
1184 | else { | |
beaed73f | 1185 | log_error("%s(%d): ddns_update_lease_ptr failed. " |
3221151b | 1186 | "Lease for %s not found.", |
beaed73f | 1187 | file, line, piaddr(ddns_cb->address)); |
beaed73f SR |
1188 | |
1189 | #if defined (DNS_UPDATES_MEMORY_CHECKS) | |
1190 | update_lease_failed(NULL, NULL, ddns_cb, ddns_cb_set, | |
1191 | file, line); | |
1192 | #endif | |
1193 | /* | |
1194 | * may not reach this. update_lease_failed | |
1195 | * calls log_fatal. | |
1196 | */ | |
1197 | return(ISC_R_FAILURE); | |
1198 | ||
98bf1607 SR |
1199 | } |
1200 | } else if (ddns_cb->address.len == 16) { | |
1201 | struct iasubopt *find_lease6 = NULL; | |
1202 | struct ipv6_pool *pool = NULL; | |
1203 | struct in6_addr addr; | |
beaed73f | 1204 | char addrbuf[MAX_ADDRESS_STRING_LEN]; |
98bf1607 SR |
1205 | |
1206 | memcpy(&addr, &ddns_cb->address.iabuf, 16); | |
1207 | if ((find_ipv6_pool(&pool, D6O_IA_TA, &addr) != | |
1208 | ISC_R_SUCCESS) && | |
1209 | (find_ipv6_pool(&pool, D6O_IA_NA, &addr) != | |
1210 | ISC_R_SUCCESS)) { | |
0ef9a46e | 1211 | inet_ntop(AF_INET6, &addr, addrbuf, |
beaed73f SR |
1212 | MAX_ADDRESS_STRING_LEN); |
1213 | log_error("%s(%d): Pool for lease %s not found.", | |
1214 | file, line, addrbuf); | |
1215 | #if defined (DNS_UPDATES_MEMORY_CHECKS) | |
1216 | update_lease_failed(NULL, NULL, ddns_cb, ddns_cb_set, | |
1217 | file, line); | |
1218 | #endif | |
1219 | /* | |
1220 | * never reached. update_lease_failed | |
1221 | * calls log_fatal. | |
1222 | */ | |
98bf1607 SR |
1223 | return(ISC_R_FAILURE); |
1224 | } | |
1225 | ||
3221151b | 1226 | if (iasubopt_hash_lookup(&find_lease6, pool->leases, |
98bf1607 SR |
1227 | &addr, 16, MDL)) { |
1228 | find_lease6->ddns_cb = ddns_cb_set; | |
1229 | iasubopt_dereference(&find_lease6, MDL); | |
1230 | } else { | |
0ef9a46e | 1231 | inet_ntop(AF_INET6, &addr, addrbuf, |
beaed73f SR |
1232 | MAX_ADDRESS_STRING_LEN); |
1233 | log_error("%s(%d): Lease %s not found within pool.", | |
1234 | file, line, addrbuf); | |
1235 | #if defined (DNS_UPDATES_MEMORY_CHECKS) | |
1236 | update_lease_failed(NULL, NULL, ddns_cb, ddns_cb_set, | |
1237 | file, line); | |
1238 | #endif | |
1239 | /* | |
1240 | * never reached. update_lease_failed | |
1241 | * calls log_fatal. | |
1242 | */ | |
98bf1607 SR |
1243 | return(ISC_R_FAILURE); |
1244 | } | |
1245 | ipv6_pool_dereference(&pool, MDL); | |
1246 | } else { | |
1247 | /* shouldn't get here */ | |
beaed73f SR |
1248 | log_fatal("Impossible condition at %s:%d, called from %s:%d.", |
1249 | MDL, file, line); | |
98bf1607 SR |
1250 | } |
1251 | ||
1252 | return(ISC_R_SUCCESS); | |
1253 | } | |
1254 | ||
1255 | void | |
1256 | ddns_ptr_add(dhcp_ddns_cb_t *ddns_cb, | |
1257 | isc_result_t eresult) | |
1258 | { | |
1259 | if (eresult == ISC_R_SUCCESS) { | |
7aa153b8 | 1260 | log_info("Added reverse map from %.*s to %.*s", |
98bf1607 SR |
1261 | (int)ddns_cb->rev_name.len, |
1262 | (const char *)ddns_cb->rev_name.data, | |
1263 | (int)ddns_cb->fwd_name.len, | |
1264 | (const char *)ddns_cb->fwd_name.data); | |
1265 | ||
1266 | ddns_update_lease_text(ddns_cb, NULL); | |
1267 | } else { | |
7aa153b8 | 1268 | log_error("Unable to add reverse map from %.*s to %.*s: %s", |
98bf1607 SR |
1269 | (int)ddns_cb->rev_name.len, |
1270 | (const char *)ddns_cb->rev_name.data, | |
1271 | (int)ddns_cb->fwd_name.len, | |
1272 | (const char *)ddns_cb->fwd_name.data, | |
1273 | isc_result_totext (eresult)); | |
1274 | } | |
1275 | ||
beaed73f | 1276 | ddns_update_lease_ptr(NULL, NULL, ddns_cb, NULL, MDL); |
98bf1607 SR |
1277 | ddns_cb_free(ddns_cb, MDL); |
1278 | /* | |
1279 | * A single DDNS operation may require several calls depending on | |
1280 | * the current state as the prerequisites for the first message | |
1281 | * may not succeed requiring a second operation and potentially | |
1282 | * a ptr operation after that. The commit_leases operation is | |
1283 | * invoked at the end of this set of operations in order to require | |
1284 | * a single write for all of the changes. We call commit_leases | |
1285 | * here rather than immediately after the call to update the lease | |
1286 | * text in order to save any previously written data. | |
1287 | */ | |
1288 | commit_leases(); | |
1289 | return; | |
1290 | } | |
1291 | ||
1292 | /* | |
1293 | * action routine when trying to remove a pointer | |
1294 | * this will be called after the ddns queries have completed | |
1295 | * if we succeeded in removing the pointer we go to the next step (if any) | |
1296 | * if not we cleanup and leave. | |
1297 | */ | |
1298 | ||
1299 | void | |
1300 | ddns_ptr_remove(dhcp_ddns_cb_t *ddns_cb, | |
1301 | isc_result_t eresult) | |
1302 | { | |
1303 | isc_result_t result = eresult; | |
1304 | ||
1305 | switch(eresult) { | |
1306 | case ISC_R_SUCCESS: | |
7aa153b8 | 1307 | log_info("Removed reverse map on %.*s", |
98bf1607 SR |
1308 | (int)ddns_cb->rev_name.len, |
1309 | (const char *)ddns_cb->rev_name.data); | |
1310 | /* fall through */ | |
1311 | case DNS_R_NXRRSET: | |
1312 | case DNS_R_NXDOMAIN: | |
1313 | /* No entry is the same as success. | |
1314 | * Remove the information from the lease and | |
1315 | * continue with any next step */ | |
1316 | ddns_update_lease_text(ddns_cb, NULL); | |
1317 | ||
1318 | /* trigger any add operation */ | |
1319 | result = ISC_R_SUCCESS; | |
87132514 SR |
1320 | #if defined (DEBUG_DNS_UPDATES) |
1321 | log_info("DDNS: removed map or no reverse map to remove %.*s", | |
1322 | (int)ddns_cb->rev_name.len, | |
1323 | (const char *)ddns_cb->rev_name.data); | |
1324 | #endif | |
98bf1607 SR |
1325 | break; |
1326 | ||
1327 | default: | |
7aa153b8 | 1328 | log_error("Can't remove reverse map on %.*s: %s", |
98bf1607 SR |
1329 | (int)ddns_cb->rev_name.len, |
1330 | (const char *)ddns_cb->rev_name.data, | |
1331 | isc_result_totext (eresult)); | |
1332 | break; | |
1333 | } | |
1334 | ||
beaed73f | 1335 | ddns_update_lease_ptr(NULL, NULL, ddns_cb, NULL, MDL); |
98bf1607 SR |
1336 | ddns_fwd_srv_connector(NULL, NULL, NULL, ddns_cb->next_op, result); |
1337 | ddns_cb_free(ddns_cb, MDL); | |
1338 | return; | |
1339 | } | |
1340 | ||
1341 | ||
1342 | /* | |
1343 | * If the first query succeeds, the updater can conclude that it | |
1344 | * has added a new name whose only RRs are the A and DHCID RR records. | |
1345 | * The A RR update is now complete (and a client updater is finished, | |
1346 | * while a server might proceed to perform a PTR RR update). | |
1347 | * -- "Interaction between DHCP and DNS" | |
1348 | * | |
1349 | * If the second query succeeds, the updater can conclude that the current | |
1350 | * client was the last client associated with the domain name, and that | |
1351 | * the name now contains the updated A RR. The A RR update is now | |
1352 | * complete (and a client updater is finished, while a server would | |
1353 | * then proceed to perform a PTR RR update). | |
1354 | * -- "Interaction between DHCP and DNS" | |
1355 | * | |
1356 | * If the second query fails with NXRRSET, the updater must conclude | |
1357 | * that the client's desired name is in use by another host. At this | |
1358 | * juncture, the updater can decide (based on some administrative | |
1359 | * configuration outside of the scope of this document) whether to let | |
1360 | * the existing owner of the name keep that name, and to (possibly) | |
1361 | * perform some name disambiguation operation on behalf of the current | |
1362 | * client, or to replace the RRs on the name with RRs that represent | |
1363 | * the current client. If the configured policy allows replacement of | |
1364 | * existing records, the updater submits a query that deletes the | |
1365 | * existing A RR and the existing DHCID RR, adding A and DHCID RRs that | |
1366 | * represent the IP address and client-identity of the new client. | |
1367 | * -- "Interaction between DHCP and DNS" | |
1368 | */ | |
1369 | ||
1370 | void | |
1371 | ddns_fwd_srv_add2(dhcp_ddns_cb_t *ddns_cb, | |
1372 | isc_result_t eresult) | |
1373 | { | |
1374 | isc_result_t result; | |
1375 | const char *logstr = NULL; | |
beaed73f | 1376 | char ddns_address[MAX_ADDRESS_STRING_LEN]; |
98bf1607 SR |
1377 | |
1378 | /* Construct a printable form of the address for logging */ | |
1379 | strcpy(ddns_address, piaddr(ddns_cb->address)); | |
1380 | ||
1381 | switch(eresult) { | |
1382 | case ISC_R_SUCCESS: | |
1383 | log_info("Added new forward map from %.*s to %s", | |
1384 | (int)ddns_cb->fwd_name.len, | |
1385 | (const char *)ddns_cb->fwd_name.data, | |
1386 | ddns_address); | |
1387 | ||
1388 | ddns_update_lease_text(ddns_cb, NULL); | |
1389 | ||
1390 | if ((ddns_cb->flags & DDNS_UPDATE_PTR) != 0) { | |
1391 | /* if we have zone information get rid of it */ | |
1392 | if (ddns_cb->zone != NULL) { | |
1393 | ddns_cb_forget_zone(ddns_cb); | |
1394 | } | |
1395 | ||
1396 | ddns_cb->state = DDNS_STATE_ADD_PTR; | |
1397 | ddns_cb->cur_func = ddns_ptr_add; | |
1398 | ||
87132514 | 1399 | result = ddns_modify_ptr(ddns_cb, MDL); |
98bf1607 SR |
1400 | if (result == ISC_R_SUCCESS) { |
1401 | return; | |
1402 | } | |
1403 | } | |
1404 | break; | |
1405 | ||
1406 | case DNS_R_YXRRSET: | |
1407 | case DNS_R_YXDOMAIN: | |
1408 | logstr = "DHCID mismatch, belongs to another client."; | |
1409 | break; | |
1410 | ||
1411 | case DNS_R_NXRRSET: | |
1412 | case DNS_R_NXDOMAIN: | |
1413 | logstr = "Has an address record but no DHCID, not mine."; | |
1414 | break; | |
1415 | ||
1416 | default: | |
1417 | logstr = isc_result_totext(eresult); | |
1418 | break; | |
1419 | } | |
1420 | ||
1421 | if (logstr != NULL) { | |
1422 | log_error("Forward map from %.*s to %s FAILED: %s", | |
1423 | (int)ddns_cb->fwd_name.len, | |
1424 | (const char *)ddns_cb->fwd_name.data, | |
1425 | ddns_address, logstr); | |
1426 | } | |
1427 | ||
beaed73f | 1428 | ddns_update_lease_ptr(NULL, NULL, ddns_cb, NULL, MDL); |
98bf1607 SR |
1429 | ddns_cb_free(ddns_cb, MDL); |
1430 | /* | |
1431 | * A single DDNS operation may require several calls depending on | |
1432 | * the current state as the prerequisites for the first message | |
1433 | * may not succeed requiring a second operation and potentially | |
1434 | * a ptr operation after that. The commit_leases operation is | |
1435 | * invoked at the end of this set of operations in order to require | |
1436 | * a single write for all of the changes. We call commit_leases | |
1437 | * here rather than immediately after the call to update the lease | |
1438 | * text in order to save any previously written data. | |
1439 | */ | |
1440 | commit_leases(); | |
1441 | return; | |
1442 | } | |
1443 | ||
1444 | void | |
1445 | ddns_fwd_srv_add1(dhcp_ddns_cb_t *ddns_cb, | |
1446 | isc_result_t eresult) | |
1447 | { | |
1448 | isc_result_t result; | |
beaed73f | 1449 | char ddns_address[MAX_ADDRESS_STRING_LEN]; |
98bf1607 SR |
1450 | |
1451 | /* Construct a printable form of the address for logging */ | |
1452 | strcpy(ddns_address, piaddr(ddns_cb->address)); | |
1453 | ||
1454 | switch(eresult) { | |
1455 | case ISC_R_SUCCESS: | |
1456 | log_info ("Added new forward map from %.*s to %s", | |
1457 | (int)ddns_cb->fwd_name.len, | |
1458 | (const char *)ddns_cb->fwd_name.data, | |
1459 | ddns_address); | |
1460 | ||
1461 | ddns_update_lease_text(ddns_cb, NULL); | |
1462 | ||
1463 | if ((ddns_cb->flags & DDNS_UPDATE_PTR) != 0) { | |
1464 | /* if we have zone information get rid of it */ | |
1465 | if (ddns_cb->zone != NULL) { | |
1466 | ddns_cb_forget_zone(ddns_cb); | |
1467 | } | |
1468 | ||
1469 | ddns_cb->state = DDNS_STATE_ADD_PTR; | |
1470 | ddns_cb->cur_func = ddns_ptr_add; | |
1471 | ||
87132514 | 1472 | result = ddns_modify_ptr(ddns_cb, MDL); |
98bf1607 SR |
1473 | if (result == ISC_R_SUCCESS) { |
1474 | return; | |
1475 | } | |
1476 | } | |
98bf1607 SR |
1477 | break; |
1478 | ||
1479 | case DNS_R_YXDOMAIN: | |
1480 | /* we can reuse the zone information */ | |
1481 | ddns_cb->state = DDNS_STATE_ADD_FW_YXDHCID; | |
1482 | ddns_cb->cur_func = ddns_fwd_srv_add2; | |
1483 | ||
87132514 | 1484 | result = ddns_modify_fwd(ddns_cb, MDL); |
98bf1607 SR |
1485 | if (result == ISC_R_SUCCESS) { |
1486 | return; | |
1487 | } | |
98bf1607 SR |
1488 | break; |
1489 | ||
1490 | default: | |
1491 | log_error ("Unable to add forward map from %.*s to %s: %s", | |
1492 | (int)ddns_cb->fwd_name.len, | |
1493 | (const char *)ddns_cb->fwd_name.data, | |
1494 | ddns_address, | |
1495 | isc_result_totext (eresult)); | |
1496 | break; | |
1497 | } | |
1498 | ||
beaed73f | 1499 | ddns_update_lease_ptr(NULL, NULL, ddns_cb, NULL, MDL); |
98bf1607 SR |
1500 | ddns_cb_free(ddns_cb, MDL); |
1501 | /* | |
1502 | * A single DDNS operation may require several calls depending on | |
1503 | * the current state as the prerequisites for the first message | |
1504 | * may not succeed requiring a second operation and potentially | |
1505 | * a ptr operation after that. The commit_leases operation is | |
1506 | * invoked at the end of this set of operations in order to require | |
1507 | * a single write for all of the changes. We call commit_leases | |
1508 | * here rather than immediately after the call to update the lease | |
1509 | * text in order to save any previously written data. | |
1510 | */ | |
1511 | commit_leases(); | |
1512 | return; | |
1513 | } | |
1514 | ||
1515 | static void | |
1516 | ddns_fwd_srv_connector(struct lease *lease, | |
1517 | struct iasubopt *lease6, | |
1518 | struct binding_scope **inscope, | |
1519 | dhcp_ddns_cb_t *ddns_cb, | |
1520 | isc_result_t eresult) | |
1521 | { | |
1522 | isc_result_t result = ISC_R_FAILURE; | |
1523 | ||
1524 | if (ddns_cb == NULL) { | |
1525 | /* nothing to do */ | |
1526 | return; | |
1527 | } | |
1528 | ||
1529 | if (eresult == ISC_R_SUCCESS) { | |
1530 | /* | |
1531 | * If we have updates dispatch as appropriate, | |
1532 | * if not do FQDN binding if desired. | |
1533 | */ | |
1534 | ||
1535 | if (ddns_cb->flags & DDNS_UPDATE_ADDR) { | |
1536 | ddns_cb->state = DDNS_STATE_ADD_FW_NXDOMAIN; | |
1537 | ddns_cb->cur_func = ddns_fwd_srv_add1; | |
87132514 | 1538 | result = ddns_modify_fwd(ddns_cb, MDL); |
98bf1607 SR |
1539 | } else if ((ddns_cb->flags & DDNS_UPDATE_PTR) && |
1540 | (ddns_cb->rev_name.len != 0)) { | |
1541 | ddns_cb->state = DDNS_STATE_ADD_PTR; | |
1542 | ddns_cb->cur_func = ddns_ptr_add; | |
87132514 | 1543 | result = ddns_modify_ptr(ddns_cb, MDL); |
98bf1607 SR |
1544 | } else { |
1545 | ddns_update_lease_text(ddns_cb, inscope); | |
1546 | } | |
1547 | } | |
1548 | ||
1549 | if (result == ISC_R_SUCCESS) { | |
beaed73f | 1550 | ddns_update_lease_ptr(lease, lease6, ddns_cb, ddns_cb, MDL); |
98bf1607 SR |
1551 | } else { |
1552 | ddns_cb_free(ddns_cb, MDL); | |
1553 | } | |
1554 | ||
1555 | return; | |
1556 | } | |
1557 | ||
1558 | /* | |
1559 | * If the first query fails, the updater MUST NOT delete the DNS name. It | |
1560 | * may be that the host whose lease on the server has expired has moved | |
1561 | * to another network and obtained a lease from a different server, | |
1562 | * which has caused the client's A RR to be replaced. It may also be | |
1563 | * that some other client has been configured with a name that matches | |
1564 | * the name of the DHCP client, and the policy was that the last client | |
1565 | * to specify the name would get the name. In this case, the DHCID RR | |
1566 | * will no longer match the updater's notion of the client-identity of | |
1567 | * the host pointed to by the DNS name. | |
1568 | * -- "Interaction between DHCP and DNS" | |
1569 | */ | |
1570 | ||
1571 | void | |
1572 | ddns_fwd_srv_rem2(dhcp_ddns_cb_t *ddns_cb, | |
1573 | isc_result_t eresult) | |
1574 | { | |
1575 | if (eresult == ISC_R_SUCCESS) { | |
1576 | ddns_update_lease_text(ddns_cb, NULL); | |
1577 | ||
1578 | /* Do the next operation */ | |
1579 | if ((ddns_cb->flags & DDNS_UPDATE_PTR) != 0) { | |
1580 | /* if we have zone information get rid of it */ | |
1581 | if (ddns_cb->zone != NULL) { | |
1582 | ddns_cb_forget_zone(ddns_cb); | |
1583 | } | |
1584 | ||
1585 | ddns_cb->state = DDNS_STATE_REM_PTR; | |
1586 | ddns_cb->cur_func = ddns_ptr_remove; | |
1587 | ||
87132514 | 1588 | eresult = ddns_modify_ptr(ddns_cb, MDL); |
98bf1607 SR |
1589 | if (eresult == ISC_R_SUCCESS) { |
1590 | return; | |
1591 | } | |
1592 | } | |
1593 | } | |
1594 | ||
beaed73f | 1595 | ddns_update_lease_ptr(NULL, NULL, ddns_cb, NULL, MDL); |
98bf1607 SR |
1596 | ddns_fwd_srv_connector(NULL, NULL, NULL, ddns_cb->next_op, eresult); |
1597 | ddns_cb_free(ddns_cb, MDL); | |
1598 | return; | |
1599 | } | |
1600 | ||
1601 | ||
1602 | /* | |
1603 | * First action routine when trying to remove a fwd | |
1604 | * this will be called after the ddns queries have completed | |
1605 | * if we succeeded in removing the fwd we go to the next step (if any) | |
1606 | * if not we cleanup and leave. | |
1607 | */ | |
1608 | ||
1609 | void | |
1610 | ddns_fwd_srv_rem1(dhcp_ddns_cb_t *ddns_cb, | |
1611 | isc_result_t eresult) | |
1612 | { | |
1613 | isc_result_t result = eresult; | |
beaed73f | 1614 | char ddns_address[MAX_ADDRESS_STRING_LEN]; |
98bf1607 SR |
1615 | |
1616 | switch(eresult) { | |
1617 | case ISC_R_SUCCESS: | |
7aa153b8 SR |
1618 | /* Construct a printable form of the address for logging */ |
1619 | strcpy(ddns_address, piaddr(ddns_cb->address)); | |
1620 | log_info("Removed forward map from %.*s to %s", | |
1621 | (int)ddns_cb->fwd_name.len, | |
1622 | (const char*)ddns_cb->fwd_name.data, | |
1623 | ddns_address); | |
1624 | ||
98bf1607 SR |
1625 | /* Do the second step of the FWD removal */ |
1626 | ddns_cb->state = DDNS_STATE_REM_FW_NXRR; | |
1627 | ddns_cb->cur_func = ddns_fwd_srv_rem2; | |
87132514 | 1628 | result = ddns_modify_fwd(ddns_cb, MDL); |
98bf1607 SR |
1629 | if (result == ISC_R_SUCCESS) { |
1630 | return; | |
1631 | } | |
1632 | break; | |
1633 | ||
1634 | case DNS_R_NXRRSET: | |
1635 | case DNS_R_NXDOMAIN: | |
1636 | ddns_update_lease_text(ddns_cb, NULL); | |
1637 | ||
87132514 SR |
1638 | #if defined (DEBUG_DNS_UPDATES) |
1639 | log_info("DDNS: no forward map to remove. %p", ddns_cb); | |
1640 | #endif | |
1641 | ||
98bf1607 SR |
1642 | /* Do the next operation */ |
1643 | if ((ddns_cb->flags & DDNS_UPDATE_PTR) != 0) { | |
1644 | /* if we have zone information get rid of it */ | |
1645 | if (ddns_cb->zone != NULL) { | |
1646 | ddns_cb_forget_zone(ddns_cb); | |
1647 | } | |
1648 | ||
1649 | ddns_cb->state = DDNS_STATE_REM_PTR; | |
1650 | ddns_cb->cur_func = ddns_ptr_remove; | |
1651 | ||
87132514 | 1652 | result = ddns_modify_ptr(ddns_cb, MDL); |
98bf1607 SR |
1653 | if (result == ISC_R_SUCCESS) { |
1654 | return; | |
1655 | } | |
1656 | } | |
1657 | else { | |
1658 | /* Trigger the add operation */ | |
1659 | eresult = ISC_R_SUCCESS; | |
1660 | } | |
1661 | break; | |
1662 | ||
1663 | default: | |
1664 | break; | |
1665 | } | |
1666 | ||
beaed73f | 1667 | ddns_update_lease_ptr(NULL, NULL, ddns_cb, NULL, MDL); |
98bf1607 SR |
1668 | ddns_fwd_srv_connector(NULL, NULL, NULL, ddns_cb->next_op, eresult); |
1669 | ddns_cb_free(ddns_cb, MDL); | |
1670 | } | |
1671 | ||
d13db163 | 1672 | /*%< |
98bf1607 SR |
1673 | * Remove relevant entries from DNS. |
1674 | * | |
d13db163 SR |
1675 | * \li lease - lease to start with if this is for v4 |
1676 | * | |
1677 | * \li lease6 - lease to start with if this is for v6 | |
1678 | * | |
1679 | * \li add_ddns_cb - control block for additional DDNS work. This | |
1680 | * is used when the code is going to add a DDNS entry after removing | |
1681 | * the current entry. | |
0ef9a46e | 1682 | * |
d13db163 SR |
1683 | * \li active - indication about the status of the lease. It is |
1684 | * ISC_TRUE if the lease is still active, and FALSE if the lease | |
1685 | * is inactive. This is used to indicate if the lease is inactive or going | |
1686 | * to inactive so we can avoid trying to update the lease with cb pointers | |
1687 | * and text information if it isn't useful. | |
1688 | * | |
1689 | * Returns | |
1690 | * \li #ISC_R_FAILURE - badness occurred and we weren't able to do what was wanted | |
1691 | * \li #ISC_R_SUCCESS - we were able to do stuff but it's in progress | |
1692 | * | |
1693 | * in both cases any additional block has been passed on to it's handler | |
98bf1607 SR |
1694 | */ |
1695 | ||
d13db163 | 1696 | isc_result_t |
98bf1607 SR |
1697 | ddns_removals(struct lease *lease, |
1698 | struct iasubopt *lease6, | |
0ef9a46e SR |
1699 | dhcp_ddns_cb_t *add_ddns_cb, |
1700 | isc_boolean_t active) | |
385fcb27 | 1701 | { |
98bf1607 SR |
1702 | isc_result_t rcode, execute_add = ISC_R_FAILURE; |
1703 | struct binding_scope **scope = NULL; | |
d13db163 | 1704 | isc_result_t result = ISC_R_FAILURE; |
919f1407 | 1705 | dhcp_ddns_cb_t *ddns_cb = NULL; |
98bf1607 | 1706 | struct data_string leaseid; |
b992d7e2 | 1707 | |
919f1407 | 1708 | /* |
d13db163 SR |
1709 | * See if we need to cancel an outstanding request. Mostly this is |
1710 | * used to handle the case where this routine is called twice for | |
1711 | * the same release or abandon event. | |
1712 | * | |
1713 | * When called from the dns code as part of an update request | |
1714 | * (add_ddns_cb != NULL) any outstanding requests will have already | |
1715 | * been cancelled. | |
1716 | * | |
1717 | * If the new request is just a removal and we have an outstanding | |
1718 | * request we have several options: | |
1719 | * | |
1720 | * - we are doing an update or we are doing a removal and the active | |
1721 | * flag has changed from TRUE to FALSE. In these cases we need to | |
1722 | * cancel the old request and start the new one. | |
1723 | * | |
1724 | * - other wise we are doing a removal with the active flag unchanged. | |
1725 | * In this case we can let the current removal continue and do not need | |
1726 | * to start a new one. If the old request included an update to be | |
1727 | * done after the removal we need to kill the update part of the | |
1728 | * request. | |
919f1407 | 1729 | */ |
d13db163 SR |
1730 | |
1731 | if (add_ddns_cb == NULL) { | |
1732 | if ((lease != NULL) && (lease->ddns_cb != NULL)) { | |
1733 | ddns_cb = lease->ddns_cb; | |
1734 | ||
1735 | /* | |
1736 | * Is the old request an update or did the | |
1737 | * the active flag change? | |
1738 | */ | |
1739 | if (((ddns_cb->state == DDNS_STATE_ADD_PTR) || | |
1740 | (ddns_cb->state == DDNS_STATE_ADD_FW_NXDOMAIN) || | |
1741 | (ddns_cb->state == DDNS_STATE_ADD_FW_YXDHCID)) || | |
1742 | ((active == ISC_FALSE) && | |
1743 | ((ddns_cb->flags & DDNS_ACTIVE_LEASE) != 0))) { | |
1744 | /* Cancel the current request */ | |
1745 | ddns_cancel(lease->ddns_cb, MDL); | |
1746 | lease->ddns_cb = NULL; | |
1747 | } else { | |
1748 | /* Remvoval, check and remove updates */ | |
1749 | if (ddns_cb->next_op != NULL) { | |
1750 | ddns_cb_free(ddns_cb->next_op, MDL); | |
1751 | ddns_cb->next_op = NULL; | |
1752 | } | |
1753 | #if defined (DEBUG_DNS_UPDATES) | |
1754 | log_info("DDNS %s(%d): removal already in " | |
1755 | "progress new ddns_cb=%p", | |
1756 | MDL, ddns_cb); | |
1757 | #endif | |
1758 | return (ISC_R_SUCCESS); | |
1759 | } | |
1760 | } else if ((lease6 != NULL) && (lease6->ddns_cb != NULL)) { | |
1761 | ddns_cb = lease6->ddns_cb; | |
1762 | ||
1763 | /* | |
1764 | * Is the old request an update or did the | |
1765 | * the active flag change? | |
1766 | */ | |
1767 | if (((ddns_cb->state == DDNS_STATE_ADD_PTR) || | |
1768 | (ddns_cb->state == DDNS_STATE_ADD_FW_NXDOMAIN) || | |
1769 | (ddns_cb->state == DDNS_STATE_ADD_FW_YXDHCID)) || | |
1770 | ((active == ISC_FALSE) && | |
1771 | ((ddns_cb->flags & DDNS_ACTIVE_LEASE) != 0))) { | |
1772 | /* Cancel the current request */ | |
1773 | ddns_cancel(lease6->ddns_cb, MDL); | |
1774 | lease6->ddns_cb = NULL; | |
1775 | } else { | |
1776 | /* Remvoval, check and remove updates */ | |
1777 | if (ddns_cb->next_op != NULL) { | |
1778 | ddns_cb_free(ddns_cb->next_op, MDL); | |
1779 | ddns_cb->next_op = NULL; | |
1780 | } | |
1781 | #if defined (DEBUG_DNS_UPDATES) | |
1782 | log_info("DDNS %s(%d): removal already in " | |
1783 | "progress new ddns_cb=%p", | |
1784 | MDL, ddns_cb); | |
1785 | #endif | |
1786 | return (ISC_R_SUCCESS); | |
1787 | } | |
1788 | } | |
1789 | ddns_cb = NULL; | |
d208bb04 | 1790 | } |
919f1407 | 1791 | |
98bf1607 SR |
1792 | /* allocate our control block */ |
1793 | ddns_cb = ddns_cb_alloc(MDL); | |
1794 | if (ddns_cb == NULL) { | |
1795 | goto cleanup; | |
1796 | } | |
3221151b SR |
1797 | |
1798 | /* | |
1799 | * For v4 we flag static leases so we don't try | |
1800 | * and manipulate the lease later. For v6 we don't | |
1801 | * get static leases and don't need to flag them. | |
1802 | */ | |
98bd7ca0 DH |
1803 | if (lease != NULL) { |
1804 | scope = &(lease->scope); | |
98bf1607 | 1805 | ddns_cb->address = lease->ip_addr; |
3221151b SR |
1806 | if (lease->flags & STATIC_LEASE) |
1807 | ddns_cb->flags |= DDNS_STATIC_LEASE; | |
98bd7ca0 DH |
1808 | } else if (lease6 != NULL) { |
1809 | scope = &(lease6->scope); | |
98bf1607 SR |
1810 | memcpy(&ddns_cb->address.iabuf, lease6->addr.s6_addr, 16); |
1811 | ddns_cb->address.len = 16; | |
98bd7ca0 | 1812 | } else |
98bf1607 | 1813 | goto cleanup; |
98bd7ca0 | 1814 | |
0ef9a46e SR |
1815 | /* |
1816 | * Set the flag bit if the lease is active, that is it isn't | |
d13db163 SR |
1817 | * expired or released. This is used to determine if we need |
1818 | * to update the scope information for both v4 and v6 and | |
1819 | * the lease information for v6 when the response | |
0ef9a46e SR |
1820 | * from the DNS code is processed. |
1821 | */ | |
1822 | if (active == ISC_TRUE) { | |
1823 | ddns_cb->flags |= DDNS_ACTIVE_LEASE; | |
1824 | } | |
1825 | ||
b992d7e2 | 1826 | /* No scope implies that DDNS has not been performed for this lease. */ |
98bd7ca0 | 1827 | if (*scope == NULL) |
98bf1607 | 1828 | goto cleanup; |
b992d7e2 | 1829 | |
d7d9c0c7 SR |
1830 | if ((ddns_update_style != DDNS_UPDATE_STYLE_STANDARD) && |
1831 | (ddns_update_style != DDNS_UPDATE_STYLE_INTERIM)) | |
98bf1607 SR |
1832 | goto cleanup; |
1833 | ||
1834 | /* Assume that we are removing both records */ | |
3221151b | 1835 | ddns_cb->flags |= DDNS_UPDATE_ADDR | DDNS_UPDATE_PTR; |
98bf1607 SR |
1836 | |
1837 | /* and that we want to do the add call */ | |
1838 | execute_add = ISC_R_SUCCESS; | |
98311e4b | 1839 | |
b992d7e2 DN |
1840 | /* |
1841 | * Look up stored names. | |
1842 | */ | |
b992d7e2 | 1843 | |
b992d7e2 | 1844 | /* |
98bf1607 SR |
1845 | * Find the fwd name and copy it to the control block. If we don't |
1846 | * have it we can't delete the fwd record but we can still try to | |
1847 | * remove the ptr record and cleanup the lease information if the | |
1848 | * client did the fwd update. | |
b992d7e2 | 1849 | */ |
98bf1607 SR |
1850 | if (!find_bound_string(&ddns_cb->fwd_name, *scope, "ddns-fwd-name")) { |
1851 | /* don't try and delete the A, or do the add */ | |
1852 | ddns_cb->flags &= ~DDNS_UPDATE_ADDR; | |
1853 | execute_add = ISC_R_FAILURE; | |
1854 | ||
1855 | /* Check if client did update */ | |
1856 | if (find_bound_string(&ddns_cb->fwd_name, *scope, | |
1857 | "ddns-client-fqdn")) { | |
1858 | ddns_cb->flags |= DDNS_CLIENT_DID_UPDATE; | |
1859 | } | |
b992d7e2 DN |
1860 | } |
1861 | ||
98bf1607 | 1862 | /* |
d7d9c0c7 SR |
1863 | * Find the txt or dhcid tag and copy it to the control block. If we don't |
1864 | * have one this isn't an interim or standard record so we can't delete | |
98bf1607 SR |
1865 | * the A record using this mechanism but we can delete the ptr record. |
1866 | * In this case we will attempt to do any requested next step. | |
1867 | */ | |
1868 | memset(&leaseid, 0, sizeof(leaseid)); | |
d7d9c0c7 SR |
1869 | if (find_bound_string (&leaseid, *scope, ddns_standard_tag)) { |
1870 | /* We have a standard tag */ | |
1871 | ddns_cb->lease_tag = ddns_standard_tag; | |
1872 | ddns_cb->dhcid_class = dns_rdatatype_dhcid; | |
1873 | data_string_copy(&ddns_cb->dhcid, &leaseid, MDL); | |
1874 | data_string_forget(&leaseid, MDL); | |
1875 | } else if (find_bound_string (&leaseid, *scope, ddns_interim_tag)) { | |
1876 | /* we have an interim tag */ | |
1877 | ddns_cb->lease_tag = ddns_interim_tag; | |
1878 | ddns_cb->dhcid_class = dns_rdatatype_txt; | |
98bf1607 SR |
1879 | if (dhcid_fromlease(&ddns_cb->dhcid, &leaseid) != |
1880 | ISC_R_SUCCESS) { | |
1881 | /* We couldn't convert the dhcid from the lease | |
1882 | * version to the dns version. We can't delete | |
1883 | * the A record but can continue to the ptr | |
1884 | */ | |
1885 | ddns_cb->flags &= ~DDNS_UPDATE_ADDR; | |
1886 | } | |
1887 | data_string_forget(&leaseid, MDL); | |
d7d9c0c7 SR |
1888 | } else { |
1889 | ddns_cb->flags &= ~DDNS_UPDATE_ADDR; | |
1890 | } | |
478028e7 | 1891 | |
98bf1607 SR |
1892 | /* |
1893 | * Find the rev name and copy it to the control block. If we don't | |
1894 | * have it we can't get rid of it but we can try to remove the fwd | |
1895 | * pointer if desired. | |
1896 | */ | |
1897 | if (!find_bound_string(&ddns_cb->rev_name, *scope, "ddns-rev-name")) { | |
1898 | ddns_cb->flags &= ~DDNS_UPDATE_PTR; | |
478028e7 | 1899 | } |
98bf1607 SR |
1900 | |
1901 | /* | |
1902 | * If we have a second control block for doing an add | |
1903 | * after the remove finished attach it to our control block. | |
1904 | */ | |
1905 | ddns_cb->next_op = add_ddns_cb; | |
478028e7 | 1906 | |
b992d7e2 | 1907 | /* |
98bf1607 SR |
1908 | * Now that we've collected the information we can try to process it. |
1909 | * If necessary we call an appropriate routine to send a message and | |
1910 | * provide it with an action routine to run on the control block given | |
1911 | * the results of the message. We have three entry points from here, | |
1912 | * one for removing the A record, the next for removing the PTR and | |
1913 | * the third for doing any requested add. | |
b992d7e2 | 1914 | */ |
98bf1607 SR |
1915 | if ((ddns_cb->flags & DDNS_UPDATE_ADDR) != 0) { |
1916 | if (ddns_cb->fwd_name.len != 0) { | |
1917 | ddns_cb->state = DDNS_STATE_REM_FW_YXDHCID; | |
1918 | ddns_cb->cur_func = ddns_fwd_srv_rem1; | |
1919 | ||
87132514 | 1920 | rcode = ddns_modify_fwd(ddns_cb, MDL); |
98bf1607 SR |
1921 | if (rcode == ISC_R_SUCCESS) { |
1922 | ddns_update_lease_ptr(lease, lease6, ddns_cb, | |
beaed73f | 1923 | ddns_cb, MDL); |
d13db163 | 1924 | return (ISC_R_SUCCESS); |
98bf1607 | 1925 | } |
478028e7 | 1926 | |
98bf1607 SR |
1927 | /* |
1928 | * We weren't able to process the request tag the | |
1929 | * add so we won't execute it. | |
1930 | */ | |
1931 | execute_add = ISC_R_FAILURE; | |
1932 | goto cleanup; | |
1933 | } | |
1934 | else { | |
1935 | /*remove info from scope */ | |
1936 | unset(*scope, "ddns-fwd-name"); | |
d7d9c0c7 | 1937 | unset(*scope, ddns_cb->lease_tag); |
98bf1607 SR |
1938 | } |
1939 | } | |
b992d7e2 | 1940 | |
98bf1607 SR |
1941 | if ((ddns_cb->flags & DDNS_UPDATE_PTR) != 0) { |
1942 | ddns_cb->state = DDNS_STATE_REM_PTR; | |
1943 | ddns_cb->cur_func = ddns_ptr_remove; | |
1944 | ||
1945 | /* | |
1946 | * if execute add isn't success remove the control block so | |
1947 | * it won't be processed when the remove completes. We | |
1948 | * also arrange to clean it up and get rid of it. | |
1949 | */ | |
1950 | if (execute_add != ISC_R_SUCCESS) { | |
1951 | ddns_cb->next_op = NULL; | |
1952 | ddns_fwd_srv_connector(lease, lease6, scope, | |
1953 | add_ddns_cb, execute_add); | |
1954 | add_ddns_cb = NULL; | |
1955 | } | |
1956 | else { | |
d13db163 | 1957 | result = ISC_R_SUCCESS; |
98bf1607 SR |
1958 | } |
1959 | ||
87132514 | 1960 | rcode = ddns_modify_ptr(ddns_cb, MDL); |
98bf1607 | 1961 | if (rcode == ISC_R_SUCCESS) { |
beaed73f SR |
1962 | ddns_update_lease_ptr(lease, lease6, ddns_cb, ddns_cb, |
1963 | MDL); | |
d13db163 | 1964 | return (result); |
98bf1607 SR |
1965 | } |
1966 | ||
1967 | /* We weren't able to process the request tag the | |
1968 | * add so we won't execute it */ | |
1969 | execute_add = ISC_R_FAILURE; | |
1970 | goto cleanup; | |
1971 | } | |
1972 | ||
1973 | cleanup: | |
1974 | /* | |
1975 | * We've gotten here because we didn't need to send a message or | |
1976 | * we failed when trying to do so. We send the additional cb | |
1977 | * off to handle sending and/or cleanup and cleanup anything | |
1978 | * we allocated here. | |
1979 | */ | |
1980 | ddns_fwd_srv_connector(lease, lease6, scope, add_ddns_cb, execute_add); | |
919f1407 SR |
1981 | if (ddns_cb != NULL) |
1982 | ddns_cb_free(ddns_cb, MDL); | |
98bf1607 | 1983 | |
d13db163 | 1984 | return (result); |
b992d7e2 DN |
1985 | } |
1986 | ||
b992d7e2 | 1987 | #endif /* NSUPDATE */ |