5143adb549
All 9.6 users with DNSSEC validation enabled should upgrade to this version, or the latest version in the 9.7 branch, prior to 2011-03-31 in order to avoid validation failures for names in .COM as described here: https://www.isc.org/announcement/bind-9-dnssec-validation-fails-new-ds-record In addition the fixes for this and other bugs, there are also the following: * Various fixes to kerberos support, including GSS-TSIG * Various fixes to avoid leaking memory, and to problems that could prevent a clean shutdown of named
528 lines
17 KiB
C
528 lines
17 KiB
C
/*
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* Copyright (C) 2004, 2005, 2007, 2008, 2010 Internet Systems Consortium, Inc. ("ISC")
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* Copyright (C) 1999-2002 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id: rootns.c,v 1.36.50.4 2010-06-18 05:37:50 marka Exp $ */
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/*! \file */
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#include <config.h>
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#include <isc/buffer.h>
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#include <isc/string.h> /* Required for HP/UX (and others?) */
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#include <isc/util.h>
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#include <dns/callbacks.h>
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#include <dns/db.h>
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#include <dns/dbiterator.h>
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#include <dns/fixedname.h>
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#include <dns/log.h>
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#include <dns/master.h>
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#include <dns/rdata.h>
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#include <dns/rdata.h>
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#include <dns/rdataset.h>
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#include <dns/rdatasetiter.h>
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#include <dns/rdatastruct.h>
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#include <dns/rdatatype.h>
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#include <dns/result.h>
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#include <dns/rootns.h>
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#include <dns/view.h>
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static char root_ns[] =
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";\n"
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"; Internet Root Nameservers\n"
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";\n"
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"$TTL 518400\n"
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". 518400 IN NS A.ROOT-SERVERS.NET.\n"
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". 518400 IN NS B.ROOT-SERVERS.NET.\n"
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". 518400 IN NS C.ROOT-SERVERS.NET.\n"
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". 518400 IN NS D.ROOT-SERVERS.NET.\n"
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". 518400 IN NS E.ROOT-SERVERS.NET.\n"
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". 518400 IN NS F.ROOT-SERVERS.NET.\n"
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". 518400 IN NS G.ROOT-SERVERS.NET.\n"
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". 518400 IN NS H.ROOT-SERVERS.NET.\n"
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". 518400 IN NS I.ROOT-SERVERS.NET.\n"
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". 518400 IN NS J.ROOT-SERVERS.NET.\n"
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". 518400 IN NS K.ROOT-SERVERS.NET.\n"
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". 518400 IN NS L.ROOT-SERVERS.NET.\n"
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". 518400 IN NS M.ROOT-SERVERS.NET.\n"
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"A.ROOT-SERVERS.NET. 3600000 IN A 198.41.0.4\n"
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"A.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:503:BA3E::2:30\n"
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"B.ROOT-SERVERS.NET. 3600000 IN A 192.228.79.201\n"
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"C.ROOT-SERVERS.NET. 3600000 IN A 192.33.4.12\n"
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"D.ROOT-SERVERS.NET. 3600000 IN A 128.8.10.90\n"
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"E.ROOT-SERVERS.NET. 3600000 IN A 192.203.230.10\n"
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"F.ROOT-SERVERS.NET. 3600000 IN A 192.5.5.241\n"
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"F.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:500:2F::F\n"
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"G.ROOT-SERVERS.NET. 3600000 IN A 192.112.36.4\n"
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"H.ROOT-SERVERS.NET. 3600000 IN A 128.63.2.53\n"
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"H.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:500:1::803F:235\n"
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"I.ROOT-SERVERS.NET. 3600000 IN A 192.36.148.17\n"
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"I.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:7fe::53\n"
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"J.ROOT-SERVERS.NET. 3600000 IN A 192.58.128.30\n"
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"J.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:503:C27::2:30\n"
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"K.ROOT-SERVERS.NET. 3600000 IN A 193.0.14.129\n"
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"K.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:7FD::1\n"
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"L.ROOT-SERVERS.NET. 3600000 IN A 199.7.83.42\n"
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"L.ROOT-SERVERS.NET. 604800 IN AAAA 2001:500:3::42\n"
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"M.ROOT-SERVERS.NET. 3600000 IN A 202.12.27.33\n"
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"M.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:DC3::35\n";
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static isc_result_t
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in_rootns(dns_rdataset_t *rootns, dns_name_t *name) {
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isc_result_t result;
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dns_rdata_t rdata = DNS_RDATA_INIT;
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dns_rdata_ns_t ns;
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if (!dns_rdataset_isassociated(rootns))
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return (ISC_R_NOTFOUND);
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result = dns_rdataset_first(rootns);
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while (result == ISC_R_SUCCESS) {
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dns_rdataset_current(rootns, &rdata);
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result = dns_rdata_tostruct(&rdata, &ns, NULL);
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if (result != ISC_R_SUCCESS)
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return (result);
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if (dns_name_compare(name, &ns.name) == 0)
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return (ISC_R_SUCCESS);
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result = dns_rdataset_next(rootns);
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dns_rdata_reset(&rdata);
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}
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if (result == ISC_R_NOMORE)
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result = ISC_R_NOTFOUND;
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return (result);
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}
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static isc_result_t
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check_node(dns_rdataset_t *rootns, dns_name_t *name,
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dns_rdatasetiter_t *rdsiter) {
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isc_result_t result;
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dns_rdataset_t rdataset;
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dns_rdataset_init(&rdataset);
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result = dns_rdatasetiter_first(rdsiter);
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while (result == ISC_R_SUCCESS) {
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dns_rdatasetiter_current(rdsiter, &rdataset);
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switch (rdataset.type) {
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case dns_rdatatype_a:
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case dns_rdatatype_aaaa:
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result = in_rootns(rootns, name);
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if (result != ISC_R_SUCCESS)
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goto cleanup;
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break;
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case dns_rdatatype_ns:
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if (dns_name_compare(name, dns_rootname) == 0)
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break;
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/*FALLTHROUGH*/
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default:
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result = ISC_R_FAILURE;
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goto cleanup;
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}
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dns_rdataset_disassociate(&rdataset);
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result = dns_rdatasetiter_next(rdsiter);
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}
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if (result == ISC_R_NOMORE)
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result = ISC_R_SUCCESS;
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cleanup:
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if (dns_rdataset_isassociated(&rdataset))
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dns_rdataset_disassociate(&rdataset);
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return (result);
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}
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static isc_result_t
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check_hints(dns_db_t *db) {
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isc_result_t result;
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dns_rdataset_t rootns;
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dns_dbiterator_t *dbiter = NULL;
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dns_dbnode_t *node = NULL;
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isc_stdtime_t now;
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dns_fixedname_t fixname;
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dns_name_t *name;
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dns_rdatasetiter_t *rdsiter = NULL;
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isc_stdtime_get(&now);
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dns_fixedname_init(&fixname);
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name = dns_fixedname_name(&fixname);
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dns_rdataset_init(&rootns);
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(void)dns_db_find(db, dns_rootname, NULL, dns_rdatatype_ns, 0,
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now, NULL, name, &rootns, NULL);
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result = dns_db_createiterator(db, 0, &dbiter);
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if (result != ISC_R_SUCCESS)
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goto cleanup;
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result = dns_dbiterator_first(dbiter);
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while (result == ISC_R_SUCCESS) {
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result = dns_dbiterator_current(dbiter, &node, name);
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if (result != ISC_R_SUCCESS)
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goto cleanup;
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result = dns_db_allrdatasets(db, node, NULL, now, &rdsiter);
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if (result != ISC_R_SUCCESS)
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goto cleanup;
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result = check_node(&rootns, name, rdsiter);
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if (result != ISC_R_SUCCESS)
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goto cleanup;
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dns_rdatasetiter_destroy(&rdsiter);
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dns_db_detachnode(db, &node);
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result = dns_dbiterator_next(dbiter);
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}
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if (result == ISC_R_NOMORE)
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result = ISC_R_SUCCESS;
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cleanup:
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if (dns_rdataset_isassociated(&rootns))
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dns_rdataset_disassociate(&rootns);
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if (rdsiter != NULL)
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dns_rdatasetiter_destroy(&rdsiter);
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if (node != NULL)
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dns_db_detachnode(db, &node);
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if (dbiter != NULL)
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dns_dbiterator_destroy(&dbiter);
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return (result);
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}
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isc_result_t
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dns_rootns_create(isc_mem_t *mctx, dns_rdataclass_t rdclass,
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const char *filename, dns_db_t **target)
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{
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isc_result_t result, eresult;
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isc_buffer_t source;
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size_t len;
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dns_rdatacallbacks_t callbacks;
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dns_db_t *db = NULL;
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REQUIRE(target != NULL && *target == NULL);
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result = dns_db_create(mctx, "rbt", dns_rootname, dns_dbtype_zone,
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rdclass, 0, NULL, &db);
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if (result != ISC_R_SUCCESS)
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return (result);
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dns_rdatacallbacks_init(&callbacks);
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len = strlen(root_ns);
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isc_buffer_init(&source, root_ns, len);
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isc_buffer_add(&source, len);
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result = dns_db_beginload(db, &callbacks.add,
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&callbacks.add_private);
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if (result != ISC_R_SUCCESS)
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return (result);
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if (filename != NULL) {
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/*
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* Load the hints from the specified filename.
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*/
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result = dns_master_loadfile(filename, &db->origin,
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&db->origin, db->rdclass,
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DNS_MASTER_HINT,
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&callbacks, db->mctx);
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} else if (rdclass == dns_rdataclass_in) {
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/*
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* Default to using the Internet root servers.
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*/
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result = dns_master_loadbuffer(&source, &db->origin,
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&db->origin, db->rdclass,
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DNS_MASTER_HINT,
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&callbacks, db->mctx);
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} else
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result = ISC_R_NOTFOUND;
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eresult = dns_db_endload(db, &callbacks.add_private);
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if (result == ISC_R_SUCCESS || result == DNS_R_SEENINCLUDE)
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result = eresult;
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if (result != ISC_R_SUCCESS && result != DNS_R_SEENINCLUDE)
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goto db_detach;
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if (check_hints(db) != ISC_R_SUCCESS)
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isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
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DNS_LOGMODULE_HINTS, ISC_LOG_WARNING,
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"extra data in root hints '%s'",
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(filename != NULL) ? filename : "<BUILT-IN>");
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*target = db;
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return (ISC_R_SUCCESS);
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db_detach:
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dns_db_detach(&db);
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return (result);
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}
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static void
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report(dns_view_t *view, dns_name_t *name, isc_boolean_t missing,
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dns_rdata_t *rdata)
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{
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const char *viewname = "", *sep = "";
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char namebuf[DNS_NAME_FORMATSIZE];
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char typebuf[DNS_RDATATYPE_FORMATSIZE];
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char databuf[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:123.123.123.123")];
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isc_buffer_t buffer;
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isc_result_t result;
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if (strcmp(view->name, "_bind") != 0 &&
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strcmp(view->name, "_default") != 0) {
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viewname = view->name;
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sep = ": view ";
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}
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dns_name_format(name, namebuf, sizeof(namebuf));
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dns_rdatatype_format(rdata->type, typebuf, sizeof(typebuf));
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isc_buffer_init(&buffer, databuf, sizeof(databuf) - 1);
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result = dns_rdata_totext(rdata, NULL, &buffer);
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RUNTIME_CHECK(result == ISC_R_SUCCESS);
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databuf[isc_buffer_usedlength(&buffer)] = '\0';
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if (missing)
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isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
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DNS_LOGMODULE_HINTS, ISC_LOG_WARNING,
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"checkhints%s%s: %s/%s (%s) missing from hints",
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sep, viewname, namebuf, typebuf, databuf);
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else
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isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
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DNS_LOGMODULE_HINTS, ISC_LOG_WARNING,
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"checkhints%s%s: %s/%s (%s) extra record "
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"in hints", sep, viewname, namebuf, typebuf,
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databuf);
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}
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static isc_boolean_t
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inrrset(dns_rdataset_t *rrset, dns_rdata_t *rdata) {
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isc_result_t result;
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dns_rdata_t current = DNS_RDATA_INIT;
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result = dns_rdataset_first(rrset);
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while (result == ISC_R_SUCCESS) {
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dns_rdataset_current(rrset, ¤t);
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if (dns_rdata_compare(rdata, ¤t) == 0)
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return (ISC_TRUE);
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dns_rdata_reset(¤t);
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result = dns_rdataset_next(rrset);
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}
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return (ISC_FALSE);
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}
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/*
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* Check that the address RRsets match.
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*
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* Note we don't complain about missing glue records.
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*/
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static void
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check_address_records(dns_view_t *view, dns_db_t *hints, dns_db_t *db,
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dns_name_t *name, isc_stdtime_t now)
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{
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isc_result_t hresult, rresult, result;
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dns_rdataset_t hintrrset, rootrrset;
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dns_rdata_t rdata = DNS_RDATA_INIT;
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dns_name_t *foundname;
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dns_fixedname_t fixed;
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dns_rdataset_init(&hintrrset);
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dns_rdataset_init(&rootrrset);
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dns_fixedname_init(&fixed);
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foundname = dns_fixedname_name(&fixed);
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hresult = dns_db_find(hints, name, NULL, dns_rdatatype_a, 0,
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now, NULL, foundname, &hintrrset, NULL);
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rresult = dns_db_find(db, name, NULL, dns_rdatatype_a,
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DNS_DBFIND_GLUEOK, now, NULL, foundname,
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&rootrrset, NULL);
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if (hresult == ISC_R_SUCCESS &&
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(rresult == ISC_R_SUCCESS || rresult == DNS_R_GLUE)) {
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result = dns_rdataset_first(&rootrrset);
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while (result == ISC_R_SUCCESS) {
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dns_rdata_reset(&rdata);
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dns_rdataset_current(&rootrrset, &rdata);
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if (!inrrset(&hintrrset, &rdata))
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report(view, name, ISC_TRUE, &rdata);
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result = dns_rdataset_next(&rootrrset);
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}
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result = dns_rdataset_first(&hintrrset);
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while (result == ISC_R_SUCCESS) {
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dns_rdata_reset(&rdata);
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dns_rdataset_current(&hintrrset, &rdata);
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if (!inrrset(&rootrrset, &rdata))
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report(view, name, ISC_FALSE, &rdata);
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result = dns_rdataset_next(&hintrrset);
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}
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}
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if (hresult == ISC_R_NOTFOUND &&
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(rresult == ISC_R_SUCCESS || rresult == DNS_R_GLUE)) {
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result = dns_rdataset_first(&rootrrset);
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while (result == ISC_R_SUCCESS) {
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dns_rdata_reset(&rdata);
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dns_rdataset_current(&rootrrset, &rdata);
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report(view, name, ISC_TRUE, &rdata);
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result = dns_rdataset_next(&rootrrset);
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}
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}
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if (dns_rdataset_isassociated(&rootrrset))
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dns_rdataset_disassociate(&rootrrset);
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if (dns_rdataset_isassociated(&hintrrset))
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dns_rdataset_disassociate(&hintrrset);
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/*
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* Check AAAA records.
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*/
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hresult = dns_db_find(hints, name, NULL, dns_rdatatype_aaaa, 0,
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now, NULL, foundname, &hintrrset, NULL);
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rresult = dns_db_find(db, name, NULL, dns_rdatatype_aaaa,
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DNS_DBFIND_GLUEOK, now, NULL, foundname,
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&rootrrset, NULL);
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if (hresult == ISC_R_SUCCESS &&
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(rresult == ISC_R_SUCCESS || rresult == DNS_R_GLUE)) {
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result = dns_rdataset_first(&rootrrset);
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while (result == ISC_R_SUCCESS) {
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dns_rdata_reset(&rdata);
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dns_rdataset_current(&rootrrset, &rdata);
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if (!inrrset(&hintrrset, &rdata))
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report(view, name, ISC_TRUE, &rdata);
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dns_rdata_reset(&rdata);
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result = dns_rdataset_next(&rootrrset);
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}
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result = dns_rdataset_first(&hintrrset);
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while (result == ISC_R_SUCCESS) {
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dns_rdata_reset(&rdata);
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dns_rdataset_current(&hintrrset, &rdata);
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if (!inrrset(&rootrrset, &rdata))
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report(view, name, ISC_FALSE, &rdata);
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dns_rdata_reset(&rdata);
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result = dns_rdataset_next(&hintrrset);
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}
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}
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if (hresult == ISC_R_NOTFOUND &&
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(rresult == ISC_R_SUCCESS || rresult == DNS_R_GLUE)) {
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result = dns_rdataset_first(&rootrrset);
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while (result == ISC_R_SUCCESS) {
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dns_rdata_reset(&rdata);
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dns_rdataset_current(&rootrrset, &rdata);
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report(view, name, ISC_TRUE, &rdata);
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dns_rdata_reset(&rdata);
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result = dns_rdataset_next(&rootrrset);
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}
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}
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if (dns_rdataset_isassociated(&rootrrset))
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dns_rdataset_disassociate(&rootrrset);
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if (dns_rdataset_isassociated(&hintrrset))
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dns_rdataset_disassociate(&hintrrset);
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}
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void
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|
dns_root_checkhints(dns_view_t *view, dns_db_t *hints, dns_db_t *db) {
|
|
isc_result_t result;
|
|
dns_rdata_t rdata = DNS_RDATA_INIT;
|
|
dns_rdata_ns_t ns;
|
|
dns_rdataset_t hintns, rootns;
|
|
const char *viewname = "", *sep = "";
|
|
isc_stdtime_t now;
|
|
dns_name_t *name;
|
|
dns_fixedname_t fixed;
|
|
|
|
REQUIRE(hints != NULL);
|
|
REQUIRE(db != NULL);
|
|
REQUIRE(view != NULL);
|
|
|
|
isc_stdtime_get(&now);
|
|
|
|
if (strcmp(view->name, "_bind") != 0 &&
|
|
strcmp(view->name, "_default") != 0) {
|
|
viewname = view->name;
|
|
sep = ": view ";
|
|
}
|
|
|
|
dns_rdataset_init(&hintns);
|
|
dns_rdataset_init(&rootns);
|
|
dns_fixedname_init(&fixed);
|
|
name = dns_fixedname_name(&fixed);
|
|
|
|
result = dns_db_find(hints, dns_rootname, NULL, dns_rdatatype_ns, 0,
|
|
now, NULL, name, &hintns, NULL);
|
|
if (result != ISC_R_SUCCESS) {
|
|
isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
|
|
DNS_LOGMODULE_HINTS, ISC_LOG_WARNING,
|
|
"checkhints%s%s: unable to get root NS rrset "
|
|
"from hints: %s", sep, viewname,
|
|
dns_result_totext(result));
|
|
goto cleanup;
|
|
}
|
|
|
|
result = dns_db_find(db, dns_rootname, NULL, dns_rdatatype_ns, 0,
|
|
now, NULL, name, &rootns, NULL);
|
|
if (result != ISC_R_SUCCESS) {
|
|
isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
|
|
DNS_LOGMODULE_HINTS, ISC_LOG_WARNING,
|
|
"checkhints%s%s: unable to get root NS rrset "
|
|
"from cache: %s", sep, viewname,
|
|
dns_result_totext(result));
|
|
goto cleanup;
|
|
}
|
|
|
|
/*
|
|
* Look for missing root NS names.
|
|
*/
|
|
result = dns_rdataset_first(&rootns);
|
|
while (result == ISC_R_SUCCESS) {
|
|
dns_rdataset_current(&rootns, &rdata);
|
|
result = dns_rdata_tostruct(&rdata, &ns, NULL);
|
|
RUNTIME_CHECK(result == ISC_R_SUCCESS);
|
|
result = in_rootns(&hintns, &ns.name);
|
|
if (result != ISC_R_SUCCESS) {
|
|
char namebuf[DNS_NAME_FORMATSIZE];
|
|
/* missing from hints */
|
|
dns_name_format(&ns.name, namebuf, sizeof(namebuf));
|
|
isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
|
|
DNS_LOGMODULE_HINTS, ISC_LOG_WARNING,
|
|
"checkhints%s%s: unable to find root "
|
|
"NS '%s' in hints", sep, viewname,
|
|
namebuf);
|
|
} else
|
|
check_address_records(view, hints, db, &ns.name, now);
|
|
dns_rdata_reset(&rdata);
|
|
result = dns_rdataset_next(&rootns);
|
|
}
|
|
if (result != ISC_R_NOMORE) {
|
|
goto cleanup;
|
|
}
|
|
|
|
/*
|
|
* Look for extra root NS names.
|
|
*/
|
|
result = dns_rdataset_first(&hintns);
|
|
while (result == ISC_R_SUCCESS) {
|
|
dns_rdataset_current(&hintns, &rdata);
|
|
result = dns_rdata_tostruct(&rdata, &ns, NULL);
|
|
RUNTIME_CHECK(result == ISC_R_SUCCESS);
|
|
result = in_rootns(&rootns, &ns.name);
|
|
if (result != ISC_R_SUCCESS) {
|
|
char namebuf[DNS_NAME_FORMATSIZE];
|
|
/* extra entry in hints */
|
|
dns_name_format(&ns.name, namebuf, sizeof(namebuf));
|
|
isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
|
|
DNS_LOGMODULE_HINTS, ISC_LOG_WARNING,
|
|
"checkhints%s%s: extra NS '%s' in hints",
|
|
sep, viewname, namebuf);
|
|
}
|
|
dns_rdata_reset(&rdata);
|
|
result = dns_rdataset_next(&hintns);
|
|
}
|
|
if (result != ISC_R_NOMORE) {
|
|
goto cleanup;
|
|
}
|
|
|
|
cleanup:
|
|
if (dns_rdataset_isassociated(&rootns))
|
|
dns_rdataset_disassociate(&rootns);
|
|
if (dns_rdataset_isassociated(&hintns))
|
|
dns_rdataset_disassociate(&hintns);
|
|
}
|