1 // Copyright (C) 2010-2020 Internet Systems Consortium, Inc. ("ISC")
2 //
3 // This Source Code Form is subject to the terms of the Mozilla Public
4 // License, v. 2.0. If a copy of the MPL was not distributed with this
5 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
6
7 #include <config.h>
8
9 #include <dns/masterload.h>
10 #include <dns/master_loader.h>
11 #include <dns/name.h>
12 #include <dns/rdata.h>
13 #include <dns/rdataclass.h>
14 #include <dns/rrclass.h>
15 #include <dns/rrset.h>
16 #include <dns/rrttl.h>
17 #include <dns/rrtype.h>
18 #include <dns/rrcollator.h>
19 #include <exceptions/exceptions.h>
20
21 #include <boost/scoped_ptr.hpp>
22
23 #include <functional>
24 #include <istream>
25 #include <fstream>
26 #include <sstream>
27 #include <string>
28 #include <cctype>
29 #include <cerrno>
30
31 using namespace isc::dns::rdata;
32
33 using namespace std;
34 namespace ph = std::placeholders;
35
36 namespace isc {
37 namespace dns {
38 namespace {
39 void
callbackWrapper(const RRsetPtr & rrset,MasterLoadCallback callback,const Name * origin)40 callbackWrapper(const RRsetPtr& rrset, MasterLoadCallback callback,
41 const Name* origin)
42 {
43 // Origin related validation:
44 // - reject out-of-zone data
45 // - reject SOA whose owner is not at the top of zone
46 const NameComparisonResult cmp_result =
47 rrset->getName().compare(*origin);
48 if (cmp_result.getRelation() != NameComparisonResult::EQUAL &&
49 cmp_result.getRelation() != NameComparisonResult::SUBDOMAIN) {
50 isc_throw(MasterLoadError, "Out-of-zone data for " << *origin
51 << "/" << rrset->getClass() << ": " << rrset->getName());
52 }
53 if (rrset->getType() == RRType::SOA() &&
54 cmp_result.getRelation() != NameComparisonResult::EQUAL) {
55 isc_throw(MasterLoadError, "SOA not at top of zone: "
56 << *rrset);
57 }
58
59 callback(rrset);
60 }
61
62 template <typename InputType>
63 void
loadHelper(InputType input,const Name & origin,const RRClass & zone_class,MasterLoadCallback callback)64 loadHelper(InputType input, const Name& origin,
65 const RRClass& zone_class, MasterLoadCallback callback)
66 {
67 RRCollator rr_collator(std::bind(callbackWrapper, ph::_1, callback,
68 &origin));
69 MasterLoader loader(input, origin, zone_class,
70 MasterLoaderCallbacks::getNullCallbacks(),
71 rr_collator.getCallback());
72 try {
73 loader.load();
74 } catch (const MasterLoaderError& ex) {
75 isc_throw(MasterLoadError, ex.what());
76 }
77 rr_collator.flush();
78 }
79 }
80
81 void
masterLoad(const char * const filename,const Name & origin,const RRClass & zone_class,MasterLoadCallback callback)82 masterLoad(const char* const filename, const Name& origin,
83 const RRClass& zone_class, MasterLoadCallback callback)
84 {
85 if ((filename == NULL) || (*filename == '\0')) {
86 isc_throw(MasterLoadError, "Name of master file must not be null");
87 }
88
89 loadHelper<const char*>(filename, origin, zone_class, callback);
90 }
91
92 void
masterLoad(istream & input,const Name & origin,const RRClass & zone_class,MasterLoadCallback callback,const char *)93 masterLoad(istream& input, const Name& origin, const RRClass& zone_class,
94 MasterLoadCallback callback, const char*)
95 {
96 loadHelper<istream&>(input, origin, zone_class, callback);
97 }
98
99 } // namespace dns
100 } // namespace isc
101