2 * Copyright (C) 2004, 2005, 2007, 2008 Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 1999-2002 Internet Software Consortium.
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
18 /* $Id: rootns.c,v 1.36 2008/09/24 02:46:22 marka Exp $ */
24 #include <isc/buffer.h>
25 #include <isc/string.h> /* Required for HP/UX (and others?) */
28 #include <dns/callbacks.h>
30 #include <dns/dbiterator.h>
31 #include <dns/fixedname.h>
33 #include <dns/master.h>
34 #include <dns/rdata.h>
35 #include <dns/rdata.h>
36 #include <dns/rdataset.h>
37 #include <dns/rdatasetiter.h>
38 #include <dns/rdatastruct.h>
39 #include <dns/rdatatype.h>
40 #include <dns/result.h>
41 #include <dns/rootns.h>
44 static char root_ns[] =
46 "; Internet Root Nameservers\n"
49 ". 518400 IN NS A.ROOT-SERVERS.NET.\n"
50 ". 518400 IN NS B.ROOT-SERVERS.NET.\n"
51 ". 518400 IN NS C.ROOT-SERVERS.NET.\n"
52 ". 518400 IN NS D.ROOT-SERVERS.NET.\n"
53 ". 518400 IN NS E.ROOT-SERVERS.NET.\n"
54 ". 518400 IN NS F.ROOT-SERVERS.NET.\n"
55 ". 518400 IN NS G.ROOT-SERVERS.NET.\n"
56 ". 518400 IN NS H.ROOT-SERVERS.NET.\n"
57 ". 518400 IN NS I.ROOT-SERVERS.NET.\n"
58 ". 518400 IN NS J.ROOT-SERVERS.NET.\n"
59 ". 518400 IN NS K.ROOT-SERVERS.NET.\n"
60 ". 518400 IN NS L.ROOT-SERVERS.NET.\n"
61 ". 518400 IN NS M.ROOT-SERVERS.NET.\n"
62 "A.ROOT-SERVERS.NET. 3600000 IN A 198.41.0.4\n"
63 "A.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:503:BA3E::2:30\n"
64 "B.ROOT-SERVERS.NET. 3600000 IN A 192.228.79.201\n"
65 "C.ROOT-SERVERS.NET. 3600000 IN A 192.33.4.12\n"
66 "D.ROOT-SERVERS.NET. 3600000 IN A 128.8.10.90\n"
67 "E.ROOT-SERVERS.NET. 3600000 IN A 192.203.230.10\n"
68 "F.ROOT-SERVERS.NET. 3600000 IN A 192.5.5.241\n"
69 "F.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:500:2F::F\n"
70 "G.ROOT-SERVERS.NET. 3600000 IN A 192.112.36.4\n"
71 "H.ROOT-SERVERS.NET. 3600000 IN A 128.63.2.53\n"
72 "H.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:500:1::803F:235\n"
73 "I.ROOT-SERVERS.NET. 3600000 IN A 192.36.148.17\n"
74 "J.ROOT-SERVERS.NET. 3600000 IN A 192.58.128.30\n"
75 "J.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:503:C27::2:30\n"
76 "K.ROOT-SERVERS.NET. 3600000 IN A 193.0.14.129\n"
77 "K.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:7FD::1\n"
78 "L.ROOT-SERVERS.NET. 3600000 IN A 199.7.83.42\n"
79 "M.ROOT-SERVERS.NET. 3600000 IN A 202.12.27.33\n"
80 "M.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:DC3::35\n";
83 in_rootns(dns_rdataset_t *rootns, dns_name_t *name) {
85 dns_rdata_t rdata = DNS_RDATA_INIT;
88 if (!dns_rdataset_isassociated(rootns))
89 return (ISC_R_NOTFOUND);
91 result = dns_rdataset_first(rootns);
92 while (result == ISC_R_SUCCESS) {
93 dns_rdataset_current(rootns, &rdata);
94 result = dns_rdata_tostruct(&rdata, &ns, NULL);
95 if (result != ISC_R_SUCCESS)
97 if (dns_name_compare(name, &ns.name) == 0)
98 return (ISC_R_SUCCESS);
99 result = dns_rdataset_next(rootns);
100 dns_rdata_reset(&rdata);
102 if (result == ISC_R_NOMORE)
103 result = ISC_R_NOTFOUND;
108 check_node(dns_rdataset_t *rootns, dns_name_t *name,
109 dns_rdatasetiter_t *rdsiter) {
111 dns_rdataset_t rdataset;
113 dns_rdataset_init(&rdataset);
114 result = dns_rdatasetiter_first(rdsiter);
115 while (result == ISC_R_SUCCESS) {
116 dns_rdatasetiter_current(rdsiter, &rdataset);
117 switch (rdataset.type) {
118 case dns_rdatatype_a:
119 case dns_rdatatype_aaaa:
120 result = in_rootns(rootns, name);
121 if (result != ISC_R_SUCCESS)
124 case dns_rdatatype_ns:
125 if (dns_name_compare(name, dns_rootname) == 0)
129 result = ISC_R_FAILURE;
132 dns_rdataset_disassociate(&rdataset);
133 result = dns_rdatasetiter_next(rdsiter);
135 if (result == ISC_R_NOMORE)
136 result = ISC_R_SUCCESS;
138 if (dns_rdataset_isassociated(&rdataset))
139 dns_rdataset_disassociate(&rdataset);
144 check_hints(dns_db_t *db) {
146 dns_rdataset_t rootns;
147 dns_dbiterator_t *dbiter = NULL;
148 dns_dbnode_t *node = NULL;
150 dns_fixedname_t fixname;
152 dns_rdatasetiter_t *rdsiter = NULL;
154 isc_stdtime_get(&now);
156 dns_fixedname_init(&fixname);
157 name = dns_fixedname_name(&fixname);
159 dns_rdataset_init(&rootns);
160 (void)dns_db_find(db, dns_rootname, NULL, dns_rdatatype_ns, 0,
161 now, NULL, name, &rootns, NULL);
162 result = dns_db_createiterator(db, 0, &dbiter);
163 if (result != ISC_R_SUCCESS)
165 result = dns_dbiterator_first(dbiter);
166 while (result == ISC_R_SUCCESS) {
167 result = dns_dbiterator_current(dbiter, &node, name);
168 if (result != ISC_R_SUCCESS)
170 result = dns_db_allrdatasets(db, node, NULL, now, &rdsiter);
171 if (result != ISC_R_SUCCESS)
173 result = check_node(&rootns, name, rdsiter);
174 if (result != ISC_R_SUCCESS)
176 dns_rdatasetiter_destroy(&rdsiter);
177 dns_db_detachnode(db, &node);
178 result = dns_dbiterator_next(dbiter);
180 if (result == ISC_R_NOMORE)
181 result = ISC_R_SUCCESS;
184 if (dns_rdataset_isassociated(&rootns))
185 dns_rdataset_disassociate(&rootns);
187 dns_rdatasetiter_destroy(&rdsiter);
189 dns_db_detachnode(db, &node);
191 dns_dbiterator_destroy(&dbiter);
196 dns_rootns_create(isc_mem_t *mctx, dns_rdataclass_t rdclass,
197 const char *filename, dns_db_t **target)
199 isc_result_t result, eresult;
202 dns_rdatacallbacks_t callbacks;
205 REQUIRE(target != NULL && *target == NULL);
207 result = dns_db_create(mctx, "rbt", dns_rootname, dns_dbtype_zone,
208 rdclass, 0, NULL, &db);
209 if (result != ISC_R_SUCCESS)
212 dns_rdatacallbacks_init(&callbacks);
214 len = strlen(root_ns);
215 isc_buffer_init(&source, root_ns, len);
216 isc_buffer_add(&source, len);
218 result = dns_db_beginload(db, &callbacks.add,
219 &callbacks.add_private);
220 if (result != ISC_R_SUCCESS)
222 if (filename != NULL) {
224 * Load the hints from the specified filename.
226 result = dns_master_loadfile(filename, &db->origin,
227 &db->origin, db->rdclass,
229 &callbacks, db->mctx);
230 } else if (rdclass == dns_rdataclass_in) {
232 * Default to using the Internet root servers.
234 result = dns_master_loadbuffer(&source, &db->origin,
235 &db->origin, db->rdclass,
237 &callbacks, db->mctx);
239 result = ISC_R_NOTFOUND;
240 eresult = dns_db_endload(db, &callbacks.add_private);
241 if (result == ISC_R_SUCCESS || result == DNS_R_SEENINCLUDE)
243 if (result != ISC_R_SUCCESS && result != DNS_R_SEENINCLUDE)
245 if (check_hints(db) != ISC_R_SUCCESS)
246 isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
247 DNS_LOGMODULE_HINTS, ISC_LOG_WARNING,
248 "extra data in root hints '%s'",
249 (filename != NULL) ? filename : "<BUILT-IN>");
251 return (ISC_R_SUCCESS);
260 report(dns_view_t *view, dns_name_t *name, isc_boolean_t missing,
263 const char *viewname = "", *sep = "";
264 char namebuf[DNS_NAME_FORMATSIZE];
265 char typebuf[DNS_RDATATYPE_FORMATSIZE];
266 char databuf[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:123.123.123.123")];
270 if (strcmp(view->name, "_bind") != 0 &&
271 strcmp(view->name, "_default") != 0) {
272 viewname = view->name;
276 dns_name_format(name, namebuf, sizeof(namebuf));
277 dns_rdatatype_format(rdata->type, typebuf, sizeof(typebuf));
278 isc_buffer_init(&buffer, databuf, sizeof(databuf) - 1);
279 result = dns_rdata_totext(rdata, NULL, &buffer);
280 RUNTIME_CHECK(result == ISC_R_SUCCESS);
281 databuf[isc_buffer_usedlength(&buffer)] = '\0';
284 isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
285 DNS_LOGMODULE_HINTS, ISC_LOG_WARNING,
286 "checkhints%s%s: %s/%s (%s) missing from hints",
287 sep, viewname, namebuf, typebuf, databuf);
289 isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
290 DNS_LOGMODULE_HINTS, ISC_LOG_WARNING,
291 "checkhints%s%s: %s/%s (%s) extra record "
292 "in hints", sep, viewname, namebuf, typebuf,
297 inrrset(dns_rdataset_t *rrset, dns_rdata_t *rdata) {
299 dns_rdata_t current = DNS_RDATA_INIT;
301 result = dns_rdataset_first(rrset);
302 while (result == ISC_R_SUCCESS) {
303 dns_rdataset_current(rrset, ¤t);
304 if (dns_rdata_compare(rdata, ¤t) == 0)
306 dns_rdata_reset(¤t);
307 result = dns_rdataset_next(rrset);
313 * Check that the address RRsets match.
315 * Note we don't complain about missing glue records.
319 check_address_records(dns_view_t *view, dns_db_t *hints, dns_db_t *db,
320 dns_name_t *name, isc_stdtime_t now)
322 isc_result_t hresult, rresult, result;
323 dns_rdataset_t hintrrset, rootrrset;
324 dns_rdata_t rdata = DNS_RDATA_INIT;
325 dns_name_t *foundname;
326 dns_fixedname_t fixed;
328 dns_rdataset_init(&hintrrset);
329 dns_rdataset_init(&rootrrset);
330 dns_fixedname_init(&fixed);
331 foundname = dns_fixedname_name(&fixed);
333 hresult = dns_db_find(hints, name, NULL, dns_rdatatype_a, 0,
334 now, NULL, foundname, &hintrrset, NULL);
335 rresult = dns_db_find(db, name, NULL, dns_rdatatype_a,
336 DNS_DBFIND_GLUEOK, now, NULL, foundname,
338 if (hresult == ISC_R_SUCCESS &&
339 (rresult == ISC_R_SUCCESS || rresult == DNS_R_GLUE)) {
340 result = dns_rdataset_first(&rootrrset);
341 while (result == ISC_R_SUCCESS) {
342 dns_rdata_reset(&rdata);
343 dns_rdataset_current(&rootrrset, &rdata);
344 if (!inrrset(&hintrrset, &rdata))
345 report(view, name, ISC_TRUE, &rdata);
346 result = dns_rdataset_next(&rootrrset);
348 result = dns_rdataset_first(&hintrrset);
349 while (result == ISC_R_SUCCESS) {
350 dns_rdata_reset(&rdata);
351 dns_rdataset_current(&hintrrset, &rdata);
352 if (!inrrset(&rootrrset, &rdata))
353 report(view, name, ISC_FALSE, &rdata);
354 result = dns_rdataset_next(&hintrrset);
357 if (hresult == ISC_R_NOTFOUND &&
358 (rresult == ISC_R_SUCCESS || rresult == DNS_R_GLUE)) {
359 result = dns_rdataset_first(&rootrrset);
360 while (result == ISC_R_SUCCESS) {
361 dns_rdata_reset(&rdata);
362 dns_rdataset_current(&rootrrset, &rdata);
363 report(view, name, ISC_TRUE, &rdata);
364 result = dns_rdataset_next(&rootrrset);
367 if (dns_rdataset_isassociated(&rootrrset))
368 dns_rdataset_disassociate(&rootrrset);
369 if (dns_rdataset_isassociated(&hintrrset))
370 dns_rdataset_disassociate(&hintrrset);
373 * Check AAAA records.
375 hresult = dns_db_find(hints, name, NULL, dns_rdatatype_aaaa, 0,
376 now, NULL, foundname, &hintrrset, NULL);
377 rresult = dns_db_find(db, name, NULL, dns_rdatatype_aaaa,
378 DNS_DBFIND_GLUEOK, now, NULL, foundname,
380 if (hresult == ISC_R_SUCCESS &&
381 (rresult == ISC_R_SUCCESS || rresult == DNS_R_GLUE)) {
382 result = dns_rdataset_first(&rootrrset);
383 while (result == ISC_R_SUCCESS) {
384 dns_rdata_reset(&rdata);
385 dns_rdataset_current(&rootrrset, &rdata);
386 if (!inrrset(&hintrrset, &rdata))
387 report(view, name, ISC_TRUE, &rdata);
388 dns_rdata_reset(&rdata);
389 result = dns_rdataset_next(&rootrrset);
391 result = dns_rdataset_first(&hintrrset);
392 while (result == ISC_R_SUCCESS) {
393 dns_rdata_reset(&rdata);
394 dns_rdataset_current(&hintrrset, &rdata);
395 if (!inrrset(&rootrrset, &rdata))
396 report(view, name, ISC_FALSE, &rdata);
397 dns_rdata_reset(&rdata);
398 result = dns_rdataset_next(&hintrrset);
401 if (hresult == ISC_R_NOTFOUND &&
402 (rresult == ISC_R_SUCCESS || rresult == DNS_R_GLUE)) {
403 result = dns_rdataset_first(&rootrrset);
404 while (result == ISC_R_SUCCESS) {
405 dns_rdata_reset(&rdata);
406 dns_rdataset_current(&rootrrset, &rdata);
407 report(view, name, ISC_TRUE, &rdata);
408 dns_rdata_reset(&rdata);
409 result = dns_rdataset_next(&rootrrset);
412 if (dns_rdataset_isassociated(&rootrrset))
413 dns_rdataset_disassociate(&rootrrset);
414 if (dns_rdataset_isassociated(&hintrrset))
415 dns_rdataset_disassociate(&hintrrset);
419 dns_root_checkhints(dns_view_t *view, dns_db_t *hints, dns_db_t *db) {
421 dns_rdata_t rdata = DNS_RDATA_INIT;
423 dns_rdataset_t hintns, rootns;
424 const char *viewname = "", *sep = "";
427 dns_fixedname_t fixed;
429 REQUIRE(hints != NULL);
431 REQUIRE(view != NULL);
433 isc_stdtime_get(&now);
435 if (strcmp(view->name, "_bind") != 0 &&
436 strcmp(view->name, "_default") != 0) {
437 viewname = view->name;
441 dns_rdataset_init(&hintns);
442 dns_rdataset_init(&rootns);
443 dns_fixedname_init(&fixed);
444 name = dns_fixedname_name(&fixed);
446 result = dns_db_find(hints, dns_rootname, NULL, dns_rdatatype_ns, 0,
447 now, NULL, name, &hintns, NULL);
448 if (result != ISC_R_SUCCESS) {
449 isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
450 DNS_LOGMODULE_HINTS, ISC_LOG_WARNING,
451 "checkhints%s%s: unable to get root NS rrset "
452 "from hints: %s", sep, viewname,
453 dns_result_totext(result));
457 result = dns_db_find(db, dns_rootname, NULL, dns_rdatatype_ns, 0,
458 now, NULL, name, &rootns, NULL);
459 if (result != ISC_R_SUCCESS) {
460 isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
461 DNS_LOGMODULE_HINTS, ISC_LOG_WARNING,
462 "checkhints%s%s: unable to get root NS rrset "
463 "from cache: %s", sep, viewname,
464 dns_result_totext(result));
469 * Look for missing root NS names.
471 result = dns_rdataset_first(&rootns);
472 while (result == ISC_R_SUCCESS) {
473 dns_rdataset_current(&rootns, &rdata);
474 result = dns_rdata_tostruct(&rdata, &ns, NULL);
475 RUNTIME_CHECK(result == ISC_R_SUCCESS);
476 result = in_rootns(&hintns, &ns.name);
477 if (result != ISC_R_SUCCESS) {
478 char namebuf[DNS_NAME_FORMATSIZE];
479 /* missing from hints */
480 dns_name_format(&ns.name, namebuf, sizeof(namebuf));
481 isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
482 DNS_LOGMODULE_HINTS, ISC_LOG_WARNING,
483 "checkhints%s%s: unable to find root "
484 "NS '%s' in hints", sep, viewname,
487 check_address_records(view, hints, db, &ns.name, now);
488 dns_rdata_reset(&rdata);
489 result = dns_rdataset_next(&rootns);
491 if (result != ISC_R_NOMORE) {
496 * Look for extra root NS names.
498 result = dns_rdataset_first(&hintns);
499 while (result == ISC_R_SUCCESS) {
500 dns_rdataset_current(&hintns, &rdata);
501 result = dns_rdata_tostruct(&rdata, &ns, NULL);
502 RUNTIME_CHECK(result == ISC_R_SUCCESS);
503 result = in_rootns(&rootns, &ns.name);
504 if (result != ISC_R_SUCCESS) {
505 char namebuf[DNS_NAME_FORMATSIZE];
506 /* extra entry in hints */
507 dns_name_format(&ns.name, namebuf, sizeof(namebuf));
508 isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
509 DNS_LOGMODULE_HINTS, ISC_LOG_WARNING,
510 "checkhints%s%s: extra NS '%s' in hints",
511 sep, viewname, namebuf);
513 dns_rdata_reset(&rdata);
514 result = dns_rdataset_next(&hintns);
516 if (result != ISC_R_NOMORE) {
521 if (dns_rdataset_isassociated(&rootns))
522 dns_rdataset_disassociate(&rootns);
523 if (dns_rdataset_isassociated(&hintns))
524 dns_rdataset_disassociate(&hintns);