2 * Copyright (C) 2004, 2005, 2007, 2008, 2010 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 1.40 2010-06-18 05:36:24 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 "I.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:7fe::53\n"
75 "J.ROOT-SERVERS.NET. 3600000 IN A 192.58.128.30\n"
76 "J.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:503:C27::2:30\n"
77 "K.ROOT-SERVERS.NET. 3600000 IN A 193.0.14.129\n"
78 "K.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:7FD::1\n"
79 "L.ROOT-SERVERS.NET. 3600000 IN A 199.7.83.42\n"
80 "L.ROOT-SERVERS.NET. 604800 IN AAAA 2001:500:3::42\n"
81 "M.ROOT-SERVERS.NET. 3600000 IN A 202.12.27.33\n"
82 "M.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:DC3::35\n";
85 in_rootns(dns_rdataset_t *rootns, dns_name_t *name) {
87 dns_rdata_t rdata = DNS_RDATA_INIT;
90 if (!dns_rdataset_isassociated(rootns))
91 return (ISC_R_NOTFOUND);
93 result = dns_rdataset_first(rootns);
94 while (result == ISC_R_SUCCESS) {
95 dns_rdataset_current(rootns, &rdata);
96 result = dns_rdata_tostruct(&rdata, &ns, NULL);
97 if (result != ISC_R_SUCCESS)
99 if (dns_name_compare(name, &ns.name) == 0)
100 return (ISC_R_SUCCESS);
101 result = dns_rdataset_next(rootns);
102 dns_rdata_reset(&rdata);
104 if (result == ISC_R_NOMORE)
105 result = ISC_R_NOTFOUND;
110 check_node(dns_rdataset_t *rootns, dns_name_t *name,
111 dns_rdatasetiter_t *rdsiter) {
113 dns_rdataset_t rdataset;
115 dns_rdataset_init(&rdataset);
116 result = dns_rdatasetiter_first(rdsiter);
117 while (result == ISC_R_SUCCESS) {
118 dns_rdatasetiter_current(rdsiter, &rdataset);
119 switch (rdataset.type) {
120 case dns_rdatatype_a:
121 case dns_rdatatype_aaaa:
122 result = in_rootns(rootns, name);
123 if (result != ISC_R_SUCCESS)
126 case dns_rdatatype_ns:
127 if (dns_name_compare(name, dns_rootname) == 0)
131 result = ISC_R_FAILURE;
134 dns_rdataset_disassociate(&rdataset);
135 result = dns_rdatasetiter_next(rdsiter);
137 if (result == ISC_R_NOMORE)
138 result = ISC_R_SUCCESS;
140 if (dns_rdataset_isassociated(&rdataset))
141 dns_rdataset_disassociate(&rdataset);
146 check_hints(dns_db_t *db) {
148 dns_rdataset_t rootns;
149 dns_dbiterator_t *dbiter = NULL;
150 dns_dbnode_t *node = NULL;
152 dns_fixedname_t fixname;
154 dns_rdatasetiter_t *rdsiter = NULL;
156 isc_stdtime_get(&now);
158 dns_fixedname_init(&fixname);
159 name = dns_fixedname_name(&fixname);
161 dns_rdataset_init(&rootns);
162 (void)dns_db_find(db, dns_rootname, NULL, dns_rdatatype_ns, 0,
163 now, NULL, name, &rootns, NULL);
164 result = dns_db_createiterator(db, 0, &dbiter);
165 if (result != ISC_R_SUCCESS)
167 result = dns_dbiterator_first(dbiter);
168 while (result == ISC_R_SUCCESS) {
169 result = dns_dbiterator_current(dbiter, &node, name);
170 if (result != ISC_R_SUCCESS)
172 result = dns_db_allrdatasets(db, node, NULL, now, &rdsiter);
173 if (result != ISC_R_SUCCESS)
175 result = check_node(&rootns, name, rdsiter);
176 if (result != ISC_R_SUCCESS)
178 dns_rdatasetiter_destroy(&rdsiter);
179 dns_db_detachnode(db, &node);
180 result = dns_dbiterator_next(dbiter);
182 if (result == ISC_R_NOMORE)
183 result = ISC_R_SUCCESS;
186 if (dns_rdataset_isassociated(&rootns))
187 dns_rdataset_disassociate(&rootns);
189 dns_rdatasetiter_destroy(&rdsiter);
191 dns_db_detachnode(db, &node);
193 dns_dbiterator_destroy(&dbiter);
198 dns_rootns_create(isc_mem_t *mctx, dns_rdataclass_t rdclass,
199 const char *filename, dns_db_t **target)
201 isc_result_t result, eresult;
204 dns_rdatacallbacks_t callbacks;
207 REQUIRE(target != NULL && *target == NULL);
209 result = dns_db_create(mctx, "rbt", dns_rootname, dns_dbtype_zone,
210 rdclass, 0, NULL, &db);
211 if (result != ISC_R_SUCCESS)
214 dns_rdatacallbacks_init(&callbacks);
216 len = strlen(root_ns);
217 isc_buffer_init(&source, root_ns, len);
218 isc_buffer_add(&source, len);
220 result = dns_db_beginload(db, &callbacks.add,
221 &callbacks.add_private);
222 if (result != ISC_R_SUCCESS)
224 if (filename != NULL) {
226 * Load the hints from the specified filename.
228 result = dns_master_loadfile(filename, &db->origin,
229 &db->origin, db->rdclass,
231 &callbacks, db->mctx);
232 } else if (rdclass == dns_rdataclass_in) {
234 * Default to using the Internet root servers.
236 result = dns_master_loadbuffer(&source, &db->origin,
237 &db->origin, db->rdclass,
239 &callbacks, db->mctx);
241 result = ISC_R_NOTFOUND;
242 eresult = dns_db_endload(db, &callbacks.add_private);
243 if (result == ISC_R_SUCCESS || result == DNS_R_SEENINCLUDE)
245 if (result != ISC_R_SUCCESS && result != DNS_R_SEENINCLUDE)
247 if (check_hints(db) != ISC_R_SUCCESS)
248 isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
249 DNS_LOGMODULE_HINTS, ISC_LOG_WARNING,
250 "extra data in root hints '%s'",
251 (filename != NULL) ? filename : "<BUILT-IN>");
253 return (ISC_R_SUCCESS);
262 report(dns_view_t *view, dns_name_t *name, isc_boolean_t missing,
265 const char *viewname = "", *sep = "";
266 char namebuf[DNS_NAME_FORMATSIZE];
267 char typebuf[DNS_RDATATYPE_FORMATSIZE];
268 char databuf[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:123.123.123.123")];
272 if (strcmp(view->name, "_bind") != 0 &&
273 strcmp(view->name, "_default") != 0) {
274 viewname = view->name;
278 dns_name_format(name, namebuf, sizeof(namebuf));
279 dns_rdatatype_format(rdata->type, typebuf, sizeof(typebuf));
280 isc_buffer_init(&buffer, databuf, sizeof(databuf) - 1);
281 result = dns_rdata_totext(rdata, NULL, &buffer);
282 RUNTIME_CHECK(result == ISC_R_SUCCESS);
283 databuf[isc_buffer_usedlength(&buffer)] = '\0';
286 isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
287 DNS_LOGMODULE_HINTS, ISC_LOG_WARNING,
288 "checkhints%s%s: %s/%s (%s) missing from hints",
289 sep, viewname, namebuf, typebuf, databuf);
291 isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
292 DNS_LOGMODULE_HINTS, ISC_LOG_WARNING,
293 "checkhints%s%s: %s/%s (%s) extra record "
294 "in hints", sep, viewname, namebuf, typebuf,
299 inrrset(dns_rdataset_t *rrset, dns_rdata_t *rdata) {
301 dns_rdata_t current = DNS_RDATA_INIT;
303 result = dns_rdataset_first(rrset);
304 while (result == ISC_R_SUCCESS) {
305 dns_rdataset_current(rrset, ¤t);
306 if (dns_rdata_compare(rdata, ¤t) == 0)
308 dns_rdata_reset(¤t);
309 result = dns_rdataset_next(rrset);
315 * Check that the address RRsets match.
317 * Note we don't complain about missing glue records.
321 check_address_records(dns_view_t *view, dns_db_t *hints, dns_db_t *db,
322 dns_name_t *name, isc_stdtime_t now)
324 isc_result_t hresult, rresult, result;
325 dns_rdataset_t hintrrset, rootrrset;
326 dns_rdata_t rdata = DNS_RDATA_INIT;
327 dns_name_t *foundname;
328 dns_fixedname_t fixed;
330 dns_rdataset_init(&hintrrset);
331 dns_rdataset_init(&rootrrset);
332 dns_fixedname_init(&fixed);
333 foundname = dns_fixedname_name(&fixed);
335 hresult = dns_db_find(hints, name, NULL, dns_rdatatype_a, 0,
336 now, NULL, foundname, &hintrrset, NULL);
337 rresult = dns_db_find(db, name, NULL, dns_rdatatype_a,
338 DNS_DBFIND_GLUEOK, now, NULL, foundname,
340 if (hresult == ISC_R_SUCCESS &&
341 (rresult == ISC_R_SUCCESS || rresult == DNS_R_GLUE)) {
342 result = dns_rdataset_first(&rootrrset);
343 while (result == ISC_R_SUCCESS) {
344 dns_rdata_reset(&rdata);
345 dns_rdataset_current(&rootrrset, &rdata);
346 if (!inrrset(&hintrrset, &rdata))
347 report(view, name, ISC_TRUE, &rdata);
348 result = dns_rdataset_next(&rootrrset);
350 result = dns_rdataset_first(&hintrrset);
351 while (result == ISC_R_SUCCESS) {
352 dns_rdata_reset(&rdata);
353 dns_rdataset_current(&hintrrset, &rdata);
354 if (!inrrset(&rootrrset, &rdata))
355 report(view, name, ISC_FALSE, &rdata);
356 result = dns_rdataset_next(&hintrrset);
359 if (hresult == ISC_R_NOTFOUND &&
360 (rresult == ISC_R_SUCCESS || rresult == DNS_R_GLUE)) {
361 result = dns_rdataset_first(&rootrrset);
362 while (result == ISC_R_SUCCESS) {
363 dns_rdata_reset(&rdata);
364 dns_rdataset_current(&rootrrset, &rdata);
365 report(view, name, ISC_TRUE, &rdata);
366 result = dns_rdataset_next(&rootrrset);
369 if (dns_rdataset_isassociated(&rootrrset))
370 dns_rdataset_disassociate(&rootrrset);
371 if (dns_rdataset_isassociated(&hintrrset))
372 dns_rdataset_disassociate(&hintrrset);
375 * Check AAAA records.
377 hresult = dns_db_find(hints, name, NULL, dns_rdatatype_aaaa, 0,
378 now, NULL, foundname, &hintrrset, NULL);
379 rresult = dns_db_find(db, name, NULL, dns_rdatatype_aaaa,
380 DNS_DBFIND_GLUEOK, now, NULL, foundname,
382 if (hresult == ISC_R_SUCCESS &&
383 (rresult == ISC_R_SUCCESS || rresult == DNS_R_GLUE)) {
384 result = dns_rdataset_first(&rootrrset);
385 while (result == ISC_R_SUCCESS) {
386 dns_rdata_reset(&rdata);
387 dns_rdataset_current(&rootrrset, &rdata);
388 if (!inrrset(&hintrrset, &rdata))
389 report(view, name, ISC_TRUE, &rdata);
390 dns_rdata_reset(&rdata);
391 result = dns_rdataset_next(&rootrrset);
393 result = dns_rdataset_first(&hintrrset);
394 while (result == ISC_R_SUCCESS) {
395 dns_rdata_reset(&rdata);
396 dns_rdataset_current(&hintrrset, &rdata);
397 if (!inrrset(&rootrrset, &rdata))
398 report(view, name, ISC_FALSE, &rdata);
399 dns_rdata_reset(&rdata);
400 result = dns_rdataset_next(&hintrrset);
403 if (hresult == ISC_R_NOTFOUND &&
404 (rresult == ISC_R_SUCCESS || rresult == DNS_R_GLUE)) {
405 result = dns_rdataset_first(&rootrrset);
406 while (result == ISC_R_SUCCESS) {
407 dns_rdata_reset(&rdata);
408 dns_rdataset_current(&rootrrset, &rdata);
409 report(view, name, ISC_TRUE, &rdata);
410 dns_rdata_reset(&rdata);
411 result = dns_rdataset_next(&rootrrset);
414 if (dns_rdataset_isassociated(&rootrrset))
415 dns_rdataset_disassociate(&rootrrset);
416 if (dns_rdataset_isassociated(&hintrrset))
417 dns_rdataset_disassociate(&hintrrset);
421 dns_root_checkhints(dns_view_t *view, dns_db_t *hints, dns_db_t *db) {
423 dns_rdata_t rdata = DNS_RDATA_INIT;
425 dns_rdataset_t hintns, rootns;
426 const char *viewname = "", *sep = "";
429 dns_fixedname_t fixed;
431 REQUIRE(hints != NULL);
433 REQUIRE(view != NULL);
435 isc_stdtime_get(&now);
437 if (strcmp(view->name, "_bind") != 0 &&
438 strcmp(view->name, "_default") != 0) {
439 viewname = view->name;
443 dns_rdataset_init(&hintns);
444 dns_rdataset_init(&rootns);
445 dns_fixedname_init(&fixed);
446 name = dns_fixedname_name(&fixed);
448 result = dns_db_find(hints, dns_rootname, NULL, dns_rdatatype_ns, 0,
449 now, NULL, name, &hintns, NULL);
450 if (result != ISC_R_SUCCESS) {
451 isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
452 DNS_LOGMODULE_HINTS, ISC_LOG_WARNING,
453 "checkhints%s%s: unable to get root NS rrset "
454 "from hints: %s", sep, viewname,
455 dns_result_totext(result));
459 result = dns_db_find(db, dns_rootname, NULL, dns_rdatatype_ns, 0,
460 now, NULL, name, &rootns, NULL);
461 if (result != ISC_R_SUCCESS) {
462 isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
463 DNS_LOGMODULE_HINTS, ISC_LOG_WARNING,
464 "checkhints%s%s: unable to get root NS rrset "
465 "from cache: %s", sep, viewname,
466 dns_result_totext(result));
471 * Look for missing root NS names.
473 result = dns_rdataset_first(&rootns);
474 while (result == ISC_R_SUCCESS) {
475 dns_rdataset_current(&rootns, &rdata);
476 result = dns_rdata_tostruct(&rdata, &ns, NULL);
477 RUNTIME_CHECK(result == ISC_R_SUCCESS);
478 result = in_rootns(&hintns, &ns.name);
479 if (result != ISC_R_SUCCESS) {
480 char namebuf[DNS_NAME_FORMATSIZE];
481 /* missing from hints */
482 dns_name_format(&ns.name, namebuf, sizeof(namebuf));
483 isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
484 DNS_LOGMODULE_HINTS, ISC_LOG_WARNING,
485 "checkhints%s%s: unable to find root "
486 "NS '%s' in hints", sep, viewname,
489 check_address_records(view, hints, db, &ns.name, now);
490 dns_rdata_reset(&rdata);
491 result = dns_rdataset_next(&rootns);
493 if (result != ISC_R_NOMORE) {
498 * Look for extra root NS names.
500 result = dns_rdataset_first(&hintns);
501 while (result == ISC_R_SUCCESS) {
502 dns_rdataset_current(&hintns, &rdata);
503 result = dns_rdata_tostruct(&rdata, &ns, NULL);
504 RUNTIME_CHECK(result == ISC_R_SUCCESS);
505 result = in_rootns(&rootns, &ns.name);
506 if (result != ISC_R_SUCCESS) {
507 char namebuf[DNS_NAME_FORMATSIZE];
508 /* extra entry in hints */
509 dns_name_format(&ns.name, namebuf, sizeof(namebuf));
510 isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
511 DNS_LOGMODULE_HINTS, ISC_LOG_WARNING,
512 "checkhints%s%s: extra NS '%s' in hints",
513 sep, viewname, namebuf);
515 dns_rdata_reset(&rdata);
516 result = dns_rdataset_next(&hintns);
518 if (result != ISC_R_NOMORE) {
523 if (dns_rdataset_isassociated(&rootns))
524 dns_rdataset_disassociate(&rootns);
525 if (dns_rdataset_isassociated(&hintns))
526 dns_rdataset_disassociate(&hintns);