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870a0fe4 AT |
1 | #ifdef HAVE_CONFIG_H |
2 | #include "config.h" | |
3 | #endif | |
f1b59a55 RA |
4 | #include "packethandler.hh" |
5 | #include "qtype.hh" | |
6 | #include "dnspacket.hh" | |
7 | #include "packetcache.hh" | |
8 | #include "dnsseckeeper.hh" | |
9 | #include "base64.hh" | |
10 | #include "base32.hh" | |
fa8fd4d2 | 11 | |
f1b59a55 RA |
12 | #include "misc.hh" |
13 | #include "arguments.hh" | |
b3148887 RA |
14 | #include "resolver.hh" |
15 | #include "dns_random.hh" | |
7facf345 | 16 | #include "backends/gsql/ssql.hh" |
f1b59a55 RA |
17 | |
18 | extern PacketCache PC; | |
276a5ce7 | 19 | extern StatBag S; |
f1b59a55 | 20 | |
ee9ef8f2 RA |
21 | pthread_mutex_t PacketHandler::s_rfc2136lock=PTHREAD_MUTEX_INITIALIZER; |
22 | ||
f1b59a55 RA |
23 | // Implement section 3.2.1 and 3.2.2 of RFC2136 |
24 | int PacketHandler::checkUpdatePrerequisites(const DNSRecord *rr, DomainInfo *di) { | |
25 | if (rr->d_ttl != 0) | |
26 | return RCode::FormErr; | |
27 | ||
28 | // 3.2.1 and 3.2.2 check content length. | |
29 | if ( (rr->d_class == QClass::NONE || rr->d_class == QClass::ANY) && rr->d_clen != 0) | |
30 | return RCode::FormErr; | |
31 | ||
f1b59a55 RA |
32 | bool foundRecord=false; |
33 | DNSResourceRecord rec; | |
f809c028 | 34 | di->backend->lookup(QType(QType::ANY), rr->d_name); |
f1b59a55 RA |
35 | while(di->backend->get(rec)) { |
36 | if (!rec.qtype.getCode()) | |
37 | continue; | |
38 | if ((rr->d_type != QType::ANY && rec.qtype == rr->d_type) || rr->d_type == QType::ANY) | |
39 | foundRecord=true; | |
40 | } | |
41 | ||
914353ca KM |
42 | // Section 3.2.1 |
43 | if (rr->d_class == QClass::ANY && !foundRecord) { | |
44 | if (rr->d_type == QType::ANY) | |
f1b59a55 RA |
45 | return RCode::NXDomain; |
46 | if (rr->d_type != QType::ANY) | |
47 | return RCode::NXRRSet; | |
914353ca | 48 | } |
f1b59a55 RA |
49 | |
50 | // Section 3.2.2 | |
51 | if (rr->d_class == QClass::NONE && foundRecord) { | |
52 | if (rr->d_type == QType::ANY) | |
53 | return RCode::YXDomain; | |
54 | if (rr->d_type != QType::ANY) | |
55 | return RCode::YXRRSet; | |
56 | } | |
57 | ||
58 | return RCode::NoError; | |
59 | } | |
60 | ||
61 | ||
62 | // Method implements section 3.4.1 of RFC2136 | |
63 | int PacketHandler::checkUpdatePrescan(const DNSRecord *rr) { | |
64 | // The RFC stats that d_class != ZCLASS, but we only support the IN class. | |
914353ca | 65 | if (rr->d_class != QClass::IN && rr->d_class != QClass::NONE && rr->d_class != QClass::ANY) |
f1b59a55 RA |
66 | return RCode::FormErr; |
67 | ||
68 | QType qtype = QType(rr->d_type); | |
69 | ||
70 | if (! qtype.isSupportedType()) | |
71 | return RCode::FormErr; | |
72 | ||
73 | if ((rr->d_class == QClass::NONE || rr->d_class == QClass::ANY) && rr->d_ttl != 0) | |
74 | return RCode::FormErr; | |
75 | ||
76 | if (rr->d_class == QClass::ANY && rr->d_clen != 0) | |
77 | return RCode::FormErr; | |
914353ca | 78 | |
f1b59a55 RA |
79 | if (qtype.isMetadataType()) |
80 | return RCode::FormErr; | |
81 | ||
82 | if (rr->d_class != QClass::ANY && qtype.getCode() == QType::ANY) | |
83 | return RCode::FormErr; | |
84 | ||
85 | return RCode::NoError; | |
86 | } | |
87 | ||
6a323f63 | 88 | |
f1b59a55 | 89 | // Implements section 3.4.2 of RFC2136 |
d0d273cf | 90 | uint PacketHandler::performUpdate(const string &msgPrefix, const DNSRecord *rr, DomainInfo *di, bool isPresigned, bool* narrow, bool* haveNSEC3, NSEC3PARAMRecordContent *ns3pr, bool *updatedSerial) { |
968de8d0 | 91 | |
dff32e09 RA |
92 | QType rrType = QType(rr->d_type); |
93 | ||
dff32e09 | 94 | if (rrType == QType::NSEC || rrType == QType::NSEC3) { |
f809c028 | 95 | L<<Logger::Warning<<msgPrefix<<"Trying to add/update/delete "<<rr->d_name<<"|"<<rrType.getName()<<". These are generated records, ignoring!"<<endl; |
914353ca | 96 | return 0; |
dff32e09 RA |
97 | } |
98 | ||
cc8df07f | 99 | if (!isPresigned && ((!::arg().mustDo("direct-dnskey") && rrType == QType::DNSKEY) || rrType == QType::RRSIG)) { |
f809c028 | 100 | L<<Logger::Warning<<msgPrefix<<"Trying to add/update/delete "<<rr->d_name<<"|"<<rrType.getName()<<" in non-presigned zone, ignoring!"<<endl; |
dff32e09 RA |
101 | return 0; |
102 | } | |
103 | ||
f809c028 | 104 | if ((rrType == QType::NSEC3PARAM || rrType == QType::DNSKEY) && rr->d_name != di->zone) { |
105 | L<<Logger::Warning<<msgPrefix<<"Trying to add/update/delete "<<rr->d_name<<"|"<<rrType.getName()<<", "<<rrType.getName()<<" must be at zone apex, ignoring!"<<endl; | |
dff32e09 RA |
106 | return 0; |
107 | } | |
108 | ||
968de8d0 | 109 | |
d0d273cf | 110 | uint changedRecords = 0; |
6a323f63 RA |
111 | DNSResourceRecord rec; |
112 | vector<DNSResourceRecord> rrset, recordsToDelete; | |
675fa24c | 113 | set<DNSName> delnonterm, insnonterm; // used to (at the end) fix ENT records. |
6a323f63 | 114 | |
f1b59a55 | 115 | |
6a323f63 | 116 | if (rr->d_class == QClass::IN) { // 3.4.2.2 QClass::IN means insert or update |
f809c028 | 117 | DLOG(L<<msgPrefix<<"Add/Update record (QClass == IN) "<<rr->d_name<<"|"<<rrType.getName()<<endl); |
f1b59a55 | 118 | |
dff32e09 | 119 | if (rrType == QType::NSEC3PARAM) { |
8c9bde70 | 120 | L<<Logger::Notice<<msgPrefix<<"Adding/updating NSEC3PARAM for zone, resetting ordernames."<<endl; |
f858f843 | 121 | |
3343ad1f | 122 | NSEC3PARAMRecordContent nsec3param(rr->d_content->getZoneRepresentation(), di->zone.toString() /* FIXME400 huh */); |
f858f843 | 123 | *narrow = false; // adding a NSEC3 will cause narrow mode to be dropped, as you cannot specify that in a NSEC3PARAM record |
dff32e09 | 124 | d_dk.setNSEC3PARAM(di->zone, nsec3param, (*narrow)); |
8c9bde70 KM |
125 | |
126 | *haveNSEC3 = d_dk.getNSEC3PARAM(di->zone, ns3pr, narrow); | |
f858f843 | 127 | |
dff32e09 | 128 | vector<DNSResourceRecord> rrs; |
561434a6 | 129 | set<DNSName> qnames, nssets, dssets; |
f858f843 | 130 | di->backend->list(di->zone, di->id); |
dff32e09 | 131 | while (di->backend->get(rec)) { |
8c9bde70 | 132 | qnames.insert(rec.qname); |
8de4e1d7 | 133 | if(rec.qtype.getCode() == QType::NS && rec.qname != di->zone) |
8c9bde70 KM |
134 | nssets.insert(rec.qname); |
135 | if(rec.qtype.getCode() == QType::DS) | |
136 | dssets.insert(rec.qname); | |
dff32e09 | 137 | } |
f858f843 | 138 | |
561434a6 | 139 | DNSName shorter; |
561434a6 | 140 | for(const auto& qname: qnames) { |
8c9bde70 KM |
141 | shorter = qname; |
142 | int ddepth = 0; | |
143 | do { | |
8de4e1d7 | 144 | if(qname == di->zone) |
f858f843 | 145 | break; |
8c9bde70 KM |
146 | if(nssets.count(shorter)) |
147 | ++ddepth; | |
561434a6 | 148 | } while(shorter.chopOff()); |
8c9bde70 | 149 | |
96e63d77 | 150 | DNSName ordername = DNSName(toBase32Hex(hashQNameWithSalt(*ns3pr, qname))); |
8c9bde70 | 151 | if (! *narrow && (ddepth == 0 || (ddepth == 1 && nssets.count(qname)))) { |
96e63d77 | 152 | di->backend->updateDNSSECOrderNameAndAuth(di->id, qname, ordername, (ddepth == 0 )); |
8c9bde70 KM |
153 | |
154 | if (nssets.count(qname)) { | |
155 | if (ns3pr->d_flags) | |
96e63d77 KM |
156 | di->backend->updateDNSSECOrderNameAndAuth(di->id, qname, DNSName(), false, QType::NS ); |
157 | di->backend->updateDNSSECOrderNameAndAuth(di->id, qname, DNSName(), false, QType::A); | |
158 | di->backend->updateDNSSECOrderNameAndAuth(di->id, qname, DNSName(), false, QType::AAAA); | |
f858f843 | 159 | } |
f858f843 | 160 | } else { |
96e63d77 | 161 | di->backend->updateDNSSECOrderNameAndAuth(di->id, qname, DNSName(), (ddepth == 0)); |
f858f843 | 162 | } |
3343ad1f | 163 | if (ddepth == 1 || dssets.count(qname)) // FIXME400 && ? |
96e63d77 | 164 | di->backend->updateDNSSECOrderNameAndAuth(di->id, qname, ordername, false, QType::DS); |
dff32e09 RA |
165 | } |
166 | return 1; | |
167 | } | |
168 | ||
f858f843 RA |
169 | |
170 | ||
6a323f63 | 171 | bool foundRecord = false; |
f809c028 | 172 | di->backend->lookup(rrType, rr->d_name); |
f1b59a55 | 173 | while (di->backend->get(rec)) { |
dff32e09 RA |
174 | rrset.push_back(rec); |
175 | foundRecord = true; | |
6a323f63 | 176 | } |
914353ca | 177 | |
6a323f63 | 178 | if (foundRecord) { |
73174643 | 179 | |
dff32e09 | 180 | if (rrType == QType::SOA) { // SOA updates require the serial to be higher than the current |
f1b59a55 | 181 | SOAData sdOld, sdUpdate; |
6a323f63 RA |
182 | DNSResourceRecord *oldRec = &rrset.front(); |
183 | fillSOAData(oldRec->content, sdOld); | |
184 | oldRec->setContent(rr->d_content->getZoneRepresentation()); | |
185 | fillSOAData(oldRec->content, sdUpdate); | |
f1b59a55 | 186 | if (rfc1982LessThan(sdOld.serial, sdUpdate.serial)) { |
6a323f63 | 187 | di->backend->replaceRRSet(di->id, oldRec->qname, oldRec->qtype, rrset); |
f1b59a55 | 188 | *updatedSerial = true; |
f5059bd3 | 189 | changedRecords++; |
f809c028 | 190 | L<<Logger::Notice<<msgPrefix<<"Replacing record "<<rr->d_name<<"|"<<rrType.getName()<<endl; |
73174643 | 191 | } else { |
f1b59a55 | 192 | L<<Logger::Notice<<msgPrefix<<"Provided serial ("<<sdUpdate.serial<<") is older than the current serial ("<<sdOld.serial<<"), ignoring SOA update."<<endl; |
73174643 | 193 | } |
6a323f63 RA |
194 | |
195 | // It's not possible to have multiple CNAME's with the same NAME. So we always update. | |
196 | } else if (rrType == QType::CNAME) { | |
73174643 | 197 | int changedCNames = 0; |
6a323f63 | 198 | for (vector<DNSResourceRecord>::iterator i = rrset.begin(); i != rrset.end(); i++) { |
73174643 RA |
199 | if (i->ttl != rr->d_ttl || i->content != rr->d_content->getZoneRepresentation()) { |
200 | i->ttl = rr->d_ttl; | |
201 | i->setContent(rr->d_content->getZoneRepresentation()); | |
202 | changedCNames++; | |
203 | } | |
204 | } | |
205 | if (changedCNames > 0) { | |
f809c028 | 206 | di->backend->replaceRRSet(di->id, rr->d_name, rrType, rrset); |
207 | L<<Logger::Notice<<msgPrefix<<"Replacing record "<<rr->d_name<<"|"<<rrType.getName()<<endl; | |
73174643 RA |
208 | changedRecords += changedCNames; |
209 | } else { | |
f809c028 | 210 | L<<Logger::Notice<<msgPrefix<<"Replace for record "<<rr->d_name<<"|"<<rrType.getName()<<" requested, but no changes made."<<endl; |
f1b59a55 | 211 | } |
6a323f63 RA |
212 | |
213 | // In any other case, we must check if the TYPE and RDATA match to provide an update (which effectily means a update of TTL) | |
214 | } else { | |
73174643 | 215 | int updateTTL=0; |
6a323f63 RA |
216 | foundRecord = false; |
217 | for (vector<DNSResourceRecord>::iterator i = rrset.begin(); i != rrset.end(); i++) { | |
218 | string content = rr->d_content->getZoneRepresentation(); | |
219 | if (rrType == i->qtype.getCode() && i->getZoneRepresentation() == content) { | |
73174643 RA |
220 | foundRecord=true; |
221 | if (i->ttl != rr->d_ttl) { | |
222 | i->ttl = rr->d_ttl; | |
223 | updateTTL++; | |
224 | } | |
6a323f63 RA |
225 | } |
226 | } | |
73174643 | 227 | if (updateTTL > 0) { |
f809c028 | 228 | di->backend->replaceRRSet(di->id, rr->d_name, rrType, rrset); |
229 | L<<Logger::Notice<<msgPrefix<<"Replacing record "<<rr->d_name<<"|"<<rrType.getName()<<endl; | |
73174643 RA |
230 | changedRecords += updateTTL; |
231 | } else { | |
f809c028 | 232 | L<<Logger::Notice<<msgPrefix<<"Replace for record "<<rr->d_name<<"|"<<rrType.getName()<<" requested, but no changes made."<<endl; |
7facf345 | 233 | } |
f1b59a55 | 234 | } |
6e42cac2 | 235 | |
73174643 | 236 | // ReplaceRRSet dumps our ordername and auth flag, so we need to correct it if we have changed records. |
6e42cac2 | 237 | // We can take the auth flag from the first RR in the set, as the name is different, so should the auth be. |
73174643 RA |
238 | if (changedRecords > 0) { |
239 | bool auth = rrset.front().auth; | |
240 | ||
241 | if(*haveNSEC3) { | |
8de4e1d7 | 242 | DNSName ordername; |
73174643 | 243 | if(! *narrow) |
96e63d77 | 244 | ordername=DNSName(toBase32Hex(hashQNameWithSalt(*ns3pr, rr->d_name))); |
73174643 RA |
245 | |
246 | if (*narrow) | |
96e63d77 | 247 | di->backend->updateDNSSECOrderNameAndAuth(di->id, rr->d_name, DNSName(), auth); |
73174643 | 248 | else |
96e63d77 | 249 | di->backend->updateDNSSECOrderNameAndAuth(di->id, rr->d_name, ordername, auth); |
73174643 | 250 | if(!auth || rrType == QType::DS) { |
96e63d77 KM |
251 | di->backend->updateDNSSECOrderNameAndAuth(di->id, rr->d_name, DNSName(), false, QType::NS); |
252 | di->backend->updateDNSSECOrderNameAndAuth(di->id, rr->d_name, DNSName(), false, QType::A); | |
253 | di->backend->updateDNSSECOrderNameAndAuth(di->id, rr->d_name, DNSName(), false, QType::AAAA); | |
73174643 | 254 | } |
6e42cac2 | 255 | |
73174643 | 256 | } else { // NSEC |
96e63d77 | 257 | di->backend->updateDNSSECOrderNameAndAuth(di->id, rr->d_name, rr->d_name.makeRelative(di->zone), auth); |
73174643 | 258 | if(!auth || rrType == QType::DS) { |
96e63d77 KM |
259 | di->backend->updateDNSSECOrderNameAndAuth(di->id, rr->d_name, DNSName(), false, QType::A); |
260 | di->backend->updateDNSSECOrderNameAndAuth(di->id, rr->d_name, DNSName(), false, QType::AAAA); | |
73174643 | 261 | } |
6e42cac2 RA |
262 | } |
263 | } | |
264 | ||
265 | } // if (foundRecord) | |
f1b59a55 | 266 | |
6a323f63 | 267 | // If we haven't found a record that matches, we must add it. |
f1b59a55 | 268 | if (! foundRecord) { |
f809c028 | 269 | L<<Logger::Notice<<msgPrefix<<"Adding record "<<rr->d_name<<"|"<<rrType.getName()<<endl; |
270 | delnonterm.insert(rr->d_name); // always remove any ENT's in the place where we're going to add a record. | |
f1b59a55 RA |
271 | DNSResourceRecord newRec(*rr); |
272 | newRec.domain_id = di->id; | |
f809c028 | 273 | newRec.auth = (rr->d_name == di->zone || rrType.getCode() != QType::NS); |
f1b59a55 | 274 | di->backend->feedRecord(newRec); |
b0704e0d | 275 | changedRecords++; |
6a323f63 RA |
276 | |
277 | ||
278 | // because we added a record, we need to fix DNSSEC data. | |
f809c028 | 279 | DNSName shorter(rr->d_name); |
163cb726 | 280 | bool auth=newRec.auth; |
6a82ce4a | 281 | bool fixDS = (rrType == QType::DS); |
f1b59a55 | 282 | |
8de4e1d7 | 283 | if (di->zone != shorter) { // Everything at APEX is auth=1 && no ENT's |
e70f2627 | 284 | do { |
6a82ce4a | 285 | |
8de4e1d7 | 286 | if (di->zone == shorter) |
f1b59a55 | 287 | break; |
914353ca | 288 | |
f1b59a55 RA |
289 | bool foundShorter = false; |
290 | di->backend->lookup(QType(QType::ANY), shorter); | |
291 | while (di->backend->get(rec)) { | |
f809c028 | 292 | if (rec.qname == rr->d_name && rec.qtype == QType::DS) |
6a82ce4a | 293 | fixDS = true; |
f809c028 | 294 | if (shorter != rr->d_name) |
e70f2627 | 295 | foundShorter = true; |
163cb726 | 296 | if (rec.qtype == QType::NS) // are we inserting below a delegate? |
f1b59a55 RA |
297 | auth=false; |
298 | } | |
6a82ce4a | 299 | |
f809c028 | 300 | if (!foundShorter && auth && shorter != rr->d_name) // haven't found any record at current level, insert ENT. |
f1b59a55 | 301 | insnonterm.insert(shorter); |
e70f2627 | 302 | if (foundShorter) |
a95f897d | 303 | break; // if we find a shorter record, we can stop searching |
675fa24c | 304 | } while(shorter.chopOff()); |
f1b59a55 RA |
305 | } |
306 | ||
dff32e09 | 307 | if(*haveNSEC3) |
f1b59a55 | 308 | { |
8de4e1d7 | 309 | DNSName ordername; |
914353ca | 310 | if(! *narrow) |
96e63d77 | 311 | ordername=DNSName(toBase32Hex(hashQNameWithSalt(*ns3pr, rr->d_name))); |
914353ca | 312 | |
e70f2627 | 313 | if (*narrow) |
96e63d77 | 314 | di->backend->updateDNSSECOrderNameAndAuth(di->id, rr->d_name, DNSName(), auth); |
e70f2627 | 315 | else |
96e63d77 | 316 | di->backend->updateDNSSECOrderNameAndAuth(di->id, rr->d_name, ordername, auth); |
e70f2627 | 317 | |
6a82ce4a | 318 | if (fixDS) |
96e63d77 | 319 | di->backend->updateDNSSECOrderNameAndAuth(di->id, rr->d_name, ordername, true, QType::DS); |
6a82ce4a | 320 | |
929eee6b | 321 | if(!auth) |
f1b59a55 | 322 | { |
914353ca | 323 | if (ns3pr->d_flags) |
96e63d77 KM |
324 | di->backend->updateDNSSECOrderNameAndAuth(di->id, rr->d_name, DNSName(), false, QType::NS); |
325 | di->backend->updateDNSSECOrderNameAndAuth(di->id, rr->d_name, DNSName(), false, QType::A); | |
326 | di->backend->updateDNSSECOrderNameAndAuth(di->id, rr->d_name, DNSName(), false, QType::AAAA); | |
f1b59a55 RA |
327 | } |
328 | } | |
329 | else // NSEC | |
330 | { | |
96e63d77 KM |
331 | DNSName ordername=rr->d_name.makeRelative(di->zone); |
332 | di->backend->updateDNSSECOrderNameAndAuth(di->id, rr->d_name, ordername, auth); | |
6a82ce4a | 333 | if (fixDS) { |
96e63d77 | 334 | di->backend->updateDNSSECOrderNameAndAuth(di->id, rr->d_name, ordername, true, QType::DS); |
6a82ce4a RA |
335 | } |
336 | if(!auth) { | |
96e63d77 KM |
337 | di->backend->updateDNSSECOrderNameAndAuth(di->id, rr->d_name, DNSName(), false, QType::A); |
338 | di->backend->updateDNSSECOrderNameAndAuth(di->id, rr->d_name, DNSName(), false, QType::AAAA); | |
f1b59a55 RA |
339 | } |
340 | } | |
6a323f63 RA |
341 | |
342 | ||
f1b59a55 | 343 | // If we insert an NS, all the records below it become non auth - so, we're inserting a delegate. |
f809c028 | 344 | // Auth can only be false when the rr->d_name is not the zone |
6a323f63 | 345 | if (auth == false && rrType == QType::NS) { |
f809c028 | 346 | DLOG(L<<msgPrefix<<"Going to fix auth flags below "<<rr->d_name<<endl); |
6a82ce4a | 347 | insnonterm.clear(); // No ENT's are needed below delegates (auth=0) |
561434a6 | 348 | vector<DNSName> qnames; |
f809c028 | 349 | di->backend->listSubZone(rr->d_name, di->id); |
f1b59a55 | 350 | while(di->backend->get(rec)) { |
f809c028 | 351 | if (rec.qtype.getCode() && rec.qtype.getCode() != QType::DS && rr->d_name != rec.qname) // Skip ENT, DS and our already corrected record. |
f1b59a55 RA |
352 | qnames.push_back(rec.qname); |
353 | } | |
561434a6 | 354 | for(vector<DNSName>::const_iterator qname=qnames.begin(); qname != qnames.end(); ++qname) { |
dff32e09 | 355 | if(*haveNSEC3) { |
8de4e1d7 | 356 | DNSName ordername; |
914353ca | 357 | if(! *narrow) |
96e63d77 | 358 | ordername=DNSName(toBase32Hex(hashQNameWithSalt(*ns3pr, *qname))); |
914353ca | 359 | |
6a82ce4a | 360 | if (*narrow) |
96e63d77 | 361 | di->backend->updateDNSSECOrderNameAndAuth(di->id, rr->d_name, DNSName(), auth); // FIXME400 no *qname here? |
6a82ce4a | 362 | else |
96e63d77 | 363 | di->backend->updateDNSSECOrderNameAndAuth(di->id, *qname, ordername, auth); |
6a82ce4a | 364 | |
be40c2df | 365 | if (ns3pr->d_flags) |
96e63d77 KM |
366 | di->backend->updateDNSSECOrderNameAndAuth(di->id, *qname, DNSName(), false, QType::NS); |
367 | } | |
368 | else { // NSEC | |
369 | DNSName ordername=DNSName(*qname).makeRelative(di->zone); | |
370 | di->backend->updateDNSSECOrderNameAndAuth(di->id, *qname, ordername, false, QType::NS); | |
f1b59a55 | 371 | } |
f1b59a55 | 372 | |
96e63d77 KM |
373 | di->backend->updateDNSSECOrderNameAndAuth(di->id, *qname, DNSName(), false, QType::A); |
374 | di->backend->updateDNSSECOrderNameAndAuth(di->id, *qname, DNSName(), false, QType::AAAA); | |
f1b59a55 RA |
375 | } |
376 | } | |
f1b59a55 RA |
377 | } |
378 | } // rr->d_class == QClass::IN | |
379 | ||
914353ca | 380 | |
6a323f63 RA |
381 | // Delete records - section 3.4.2.3 and 3.4.2.4 with the exception of the 'always leave 1 NS rule' as that's handled by |
382 | // the code that calls this performUpdate(). | |
383 | if ((rr->d_class == QClass::ANY || rr->d_class == QClass::NONE) && rrType != QType::SOA) { // never delete a SOA. | |
f809c028 | 384 | DLOG(L<<msgPrefix<<"Deleting records: "<<rr->d_name<<"; QClasse:"<<rr->d_class<<"; rrType: "<<rrType.getName()<<endl); |
dff32e09 RA |
385 | |
386 | if (rrType == QType::NSEC3PARAM) { | |
914353ca | 387 | L<<Logger::Notice<<msgPrefix<<"Deleting NSEC3PARAM from zone, resetting ordernames."<<endl; |
dff32e09 | 388 | if (rr->d_class == QClass::ANY) |
f809c028 | 389 | d_dk.unsetNSEC3PARAM(rr->d_name); |
dff32e09 | 390 | else if (rr->d_class == QClass::NONE) { |
3343ad1f | 391 | NSEC3PARAMRecordContent nsec3rr(rr->d_content->getZoneRepresentation(), di->zone.toString() /* FIXME400 huh */); |
0bb68041 | 392 | if (ns3pr->getZoneRepresentation() == nsec3rr.getZoneRepresentation()) |
f809c028 | 393 | d_dk.unsetNSEC3PARAM(rr->d_name); |
dff32e09 RA |
394 | else |
395 | return 0; | |
914353ca | 396 | } else |
dff32e09 RA |
397 | return 0; |
398 | ||
e3dc2b56 RA |
399 | // We retrieve new values, other RR's in this update package might need it as well. |
400 | *haveNSEC3 = d_dk.getNSEC3PARAM(di->zone, ns3pr, narrow); | |
401 | ||
dff32e09 | 402 | vector<DNSResourceRecord> rrs; |
561434a6 | 403 | set<DNSName> qnames, nssets, dssets, ents; |
b48fe0e3 | 404 | di->backend->list(di->zone, di->id); |
b1ca7619 | 405 | while (di->backend->get(rec)) { |
b48fe0e3 | 406 | qnames.insert(rec.qname); |
8de4e1d7 | 407 | if(rec.qtype.getCode() == QType::NS && rec.qname != di->zone) |
b48fe0e3 KM |
408 | nssets.insert(rec.qname); |
409 | if(rec.qtype.getCode() == QType::DS) | |
410 | dssets.insert(rec.qname); | |
411 | if(!rec.qtype.getCode()) | |
412 | ents.insert(rec.qname); | |
b1ca7619 | 413 | } |
b48fe0e3 | 414 | |
561434a6 PD |
415 | DNSName shorter; |
416 | string hashed; | |
ef7cd021 | 417 | for(const DNSName& qname : qnames) { |
b48fe0e3 KM |
418 | shorter = qname; |
419 | int ddepth = 0; | |
420 | do { | |
8de4e1d7 | 421 | if(qname == di->zone) |
b48fe0e3 KM |
422 | break; |
423 | if(nssets.count(shorter)) | |
424 | ++ddepth; | |
561434a6 | 425 | } while(shorter.chopOff()); |
b48fe0e3 | 426 | |
96e63d77 | 427 | DNSName ordername=qname.makeRelative(di->zone); |
b48fe0e3 | 428 | if (!ents.count(qname) && (ddepth == 0 || (ddepth == 1 && nssets.count(qname)))) { |
96e63d77 | 429 | di->backend->updateDNSSECOrderNameAndAuth(di->id, qname, ordername, (ddepth == 0)); |
b48fe0e3 KM |
430 | |
431 | if (nssets.count(qname)) { | |
96e63d77 KM |
432 | di->backend->updateDNSSECOrderNameAndAuth(di->id, qname, DNSName(), false, QType::A); |
433 | di->backend->updateDNSSECOrderNameAndAuth(di->id, qname, DNSName(), false, QType::AAAA); | |
b1ca7619 | 434 | } |
b48fe0e3 | 435 | } else { |
96e63d77 | 436 | di->backend->updateDNSSECOrderNameAndAuth(di->id, qname, DNSName(), (ddepth == 0)); |
b1ca7619 | 437 | } |
b48fe0e3 | 438 | if (ddepth == 1 || dssets.count(qname)) |
96e63d77 | 439 | di->backend->updateDNSSECOrderNameAndAuth(di->id, qname, ordername, true, QType::DS); |
dff32e09 RA |
440 | } |
441 | return 1; | |
589563c0 | 442 | } // end of NSEC3PARAM delete block |
dff32e09 RA |
443 | |
444 | ||
f809c028 | 445 | di->backend->lookup(rrType, rr->d_name); |
6a323f63 RA |
446 | while(di->backend->get(rec)) { |
447 | if (rr->d_class == QClass::ANY) { // 3.4.2.3 | |
448 | if (rec.qname == di->zone && (rec.qtype == QType::NS || rec.qtype == QType::SOA)) // Never delete all SOA and NS's | |
449 | rrset.push_back(rec); | |
450 | else | |
f1b59a55 RA |
451 | recordsToDelete.push_back(rec); |
452 | } | |
6a323f63 RA |
453 | if (rr->d_class == QClass::NONE) { // 3.4.2.4 |
454 | if (rrType == rec.qtype && rec.getZoneRepresentation() == rr->d_content->getZoneRepresentation()) | |
455 | recordsToDelete.push_back(rec); | |
456 | else | |
457 | rrset.push_back(rec); | |
458 | } | |
f1b59a55 | 459 | } |
589563c0 RA |
460 | |
461 | if (recordsToDelete.size()) { | |
f809c028 | 462 | di->backend->replaceRRSet(di->id, rr->d_name, rrType, rrset); |
463 | L<<Logger::Notice<<msgPrefix<<"Deleting record "<<rr->d_name<<"|"<<rrType.getName()<<endl; | |
589563c0 | 464 | changedRecords += recordsToDelete.size(); |
f1b59a55 | 465 | |
f1b59a55 | 466 | |
589563c0 | 467 | // If we've removed a delegate, we need to reset ordername/auth for some records. |
f809c028 | 468 | if (rrType == QType::NS && rr->d_name != di->zone) { |
675fa24c | 469 | vector<DNSName> belowOldDelegate, nsRecs, updateAuthFlag; |
f809c028 | 470 | di->backend->listSubZone(rr->d_name, di->id); |
f1b59a55 | 471 | while (di->backend->get(rec)) { |
7a0a9f8a | 472 | if (rec.qtype.getCode()) // skip ENT records, they are always auth=false |
a95f897d | 473 | belowOldDelegate.push_back(rec.qname); |
f809c028 | 474 | if (rec.qtype.getCode() == QType::NS && rec.qname != rr->d_name) |
a95f897d | 475 | nsRecs.push_back(rec.qname); |
f1b59a55 | 476 | } |
a95f897d | 477 | |
675fa24c | 478 | for(auto &belowOldDel: belowOldDelegate) |
a95f897d RA |
479 | { |
480 | bool isBelowDelegate = false; | |
561434a6 PD |
481 | for(const auto & ns: nsRecs) { |
482 | if (ns.isPartOf(belowOldDel)) { | |
a95f897d RA |
483 | isBelowDelegate=true; |
484 | break; | |
485 | } | |
486 | } | |
487 | if (!isBelowDelegate) | |
561434a6 | 488 | updateAuthFlag.push_back(belowOldDel); |
a95f897d RA |
489 | } |
490 | ||
561434a6 | 491 | for (const auto &changeRec:updateAuthFlag) { |
dff32e09 | 492 | if(*haveNSEC3) { |
8de4e1d7 | 493 | DNSName ordername; |
914353ca | 494 | if(! *narrow) |
96e63d77 | 495 | ordername=DNSName(toBase32Hex(hashQNameWithSalt(*ns3pr, changeRec))); |
914353ca | 496 | |
96e63d77 KM |
497 | di->backend->updateDNSSECOrderNameAndAuth(di->id, changeRec, ordername, true); |
498 | } | |
499 | else { // NSEC | |
500 | DNSName ordername=changeRec.makeRelative(di->zone); | |
501 | di->backend->updateDNSSECOrderNameAndAuth(di->id, changeRec, ordername, true); | |
f1b59a55 | 502 | } |
f1b59a55 RA |
503 | } |
504 | } | |
f1b59a55 | 505 | |
6a323f63 RA |
506 | // Fix ENT records. |
507 | // We must check if we have a record below the current level and if we removed the 'last' record | |
508 | // on that level. If so, we must insert an ENT record. | |
fdf983eb | 509 | // We take extra care here to not 'include' the record that we just deleted. Some backends will still return it as they only reload on a commit. |
9353d244 | 510 | bool foundDeeper = false, foundOtherWithSameName = false; |
f809c028 | 511 | di->backend->listSubZone(rr->d_name, di->id); |
6a323f63 | 512 | while (di->backend->get(rec)) { |
f809c028 | 513 | if (rec.qname == rr->d_name && !count(recordsToDelete.begin(), recordsToDelete.end(), rec)) |
9353d244 | 514 | foundOtherWithSameName = true; |
f809c028 | 515 | if (rec.qname != rr->d_name && rec.qtype.getCode() != QType::NS) //Skip NS records, as this would be a delegate that we can ignore as this does not require us to create a ENT |
6a323f63 RA |
516 | foundDeeper = true; |
517 | } | |
f1b59a55 | 518 | |
9353d244 | 519 | if (foundDeeper && !foundOtherWithSameName) { |
f809c028 | 520 | insnonterm.insert(rr->d_name); |
9353d244 | 521 | } else if (!foundOtherWithSameName) { |
6a323f63 RA |
522 | // If we didn't have to insert an ENT, we might have deleted a record at very deep level |
523 | // and we must then clean up the ENT's above the deleted record. | |
f809c028 | 524 | DNSName shorter(rr->d_name); |
9353d244 | 525 | while (shorter != di->zone) { |
675fa24c | 526 | shorter.chopOff(); |
9353d244 | 527 | bool foundRealRR = false; |
a95f897d | 528 | bool foundEnt = false; |
9353d244 RA |
529 | |
530 | // The reason for a listSubZone here is because might go up the tree and find the ENT of another branch | |
6a323f63 | 531 | // consider these non ENT-records: |
9353d244 RA |
532 | // b.c.d.e.test.com |
533 | // b.d.e.test.com | |
534 | // if we delete b.c.d.e.test.com, we go up to d.e.test.com and then find b.d.e.test.com because that's below d.e.test.com. | |
6a323f63 RA |
535 | // At that point we can stop deleting ENT's because the tree is in tact again. |
536 | di->backend->listSubZone(shorter, di->id); | |
914353ca | 537 | |
9353d244 RA |
538 | while (di->backend->get(rec)) { |
539 | if (rec.qtype.getCode()) | |
540 | foundRealRR = true; | |
a95f897d RA |
541 | else |
542 | foundEnt = true; | |
9353d244 | 543 | } |
3ab4cfca | 544 | if (!foundRealRR) { |
a95f897d RA |
545 | if (foundEnt) // only delete the ENT if we actually found one. |
546 | delnonterm.insert(shorter); | |
3ab4cfca | 547 | } else |
9353d244 RA |
548 | break; |
549 | } | |
6a323f63 | 550 | } |
589563c0 | 551 | } else { // if (recordsToDelete.size()) |
f809c028 | 552 | L<<Logger::Notice<<msgPrefix<<"Deletion for record "<<rr->d_name<<"|"<<rrType.getName()<<" requested, but not found."<<endl; |
f1b59a55 | 553 | } |
589563c0 RA |
554 | } // (End of delete block d_class == ANY || d_class == NONE |
555 | ||
f1b59a55 | 556 | |
6a323f63 RA |
557 | |
558 | //Insert and delete ENT's | |
559 | if (insnonterm.size() > 0 || delnonterm.size() > 0) { | |
560 | DLOG(L<<msgPrefix<<"Updating ENT records - "<<insnonterm.size()<<"|"<<delnonterm.size()<<endl); | |
96e63d77 | 561 | di->backend->updateEmptyNonTerminals(di->id, insnonterm, delnonterm, false); |
561434a6 | 562 | for (const auto &i: insnonterm) { |
6a323f63 | 563 | string hashed; |
8de4e1d7 | 564 | if(*haveNSEC3) |
6a323f63 | 565 | { |
8de4e1d7 | 566 | DNSName ordername; |
914353ca | 567 | if(! *narrow) |
96e63d77 KM |
568 | ordername=DNSName(toBase32Hex(hashQNameWithSalt(*ns3pr, i))); |
569 | di->backend->updateDNSSECOrderNameAndAuth(di->id, i, ordername, true); | |
f1b59a55 RA |
570 | } |
571 | } | |
572 | } | |
573 | ||
589563c0 | 574 | return changedRecords; |
f1b59a55 RA |
575 | } |
576 | ||
b3148887 | 577 | int PacketHandler::forwardPacket(const string &msgPrefix, DNSPacket *p, DomainInfo *di) { |
e174b255 | 578 | vector<string> forward; |
71f758e0 | 579 | B.getDomainMetadata(p->qdomain, "FORWARD-DNSUPDATE", forward); |
e174b255 | 580 | |
71f758e0 | 581 | if (forward.size() == 0 && ! ::arg().mustDo("forward-dnsupdate")) { |
d8293c79 RA |
582 | L<<Logger::Notice<<msgPrefix<<"Not configured to forward to master, returning Refused."<<endl; |
583 | return RCode::Refused; | |
e174b255 RA |
584 | } |
585 | ||
b3148887 | 586 | for(vector<string>::const_iterator master=di->masters.begin(); master != di->masters.end(); master++) { |
dff32e09 | 587 | L<<Logger::Notice<<msgPrefix<<"Forwarding packet to master "<<*master<<endl; |
b3148887 RA |
588 | ComboAddress remote; |
589 | try { | |
cc456024 | 590 | remote = ComboAddress(*master, 53); |
b3148887 RA |
591 | } |
592 | catch (...) { | |
593 | L<<Logger::Error<<msgPrefix<<"Failed to parse "<<*master<<" as valid remote."<<endl; | |
594 | continue; | |
595 | } | |
596 | ||
597 | ComboAddress local; | |
598 | if(remote.sin4.sin_family == AF_INET) | |
cc456024 | 599 | local = ComboAddress(::arg()["query-local-address"]); |
b3148887 | 600 | else if(!::arg()["query-local-address6"].empty()) |
cc456024 | 601 | local = ComboAddress(::arg()["query-local-address6"]); |
b3148887 | 602 | else |
cc456024 | 603 | local = ComboAddress("::"); |
b3148887 | 604 | int sock = makeQuerySocket(local, false); // create TCP socket. RFC2136 section 6.2 seems to be ok with this. |
34c513f9 RG |
605 | if(sock < 0) { |
606 | L<<Logger::Error<<msgPrefix<<"Error creating socket: "<<stringerror()<<endl; | |
607 | continue; | |
608 | } | |
b3148887 RA |
609 | |
610 | if( connect(sock, (struct sockaddr*)&remote, remote.getSocklen()) < 0 ) { | |
611 | L<<Logger::Error<<msgPrefix<<"Failed to connect to "<<remote.toStringWithPort()<<": "<<stringerror()<<endl; | |
a7b68ae7 RG |
612 | try { |
613 | closesocket(sock); | |
614 | } | |
615 | catch(const PDNSException& e) { | |
616 | L<<Logger::Error<<"Error closing master forwarding socket after connect() failed: "<<e.reason<<endl; | |
617 | } | |
b3148887 RA |
618 | continue; |
619 | } | |
620 | ||
621 | DNSPacket forwardPacket(*p); | |
622 | forwardPacket.setID(dns_random(0xffff)); | |
623 | forwardPacket.setRemote(&remote); | |
624 | uint16_t len=htons(forwardPacket.getString().length()); | |
625 | string buffer((const char*)&len, 2); | |
626 | buffer.append(forwardPacket.getString()); | |
914353ca | 627 | if(write(sock, buffer.c_str(), buffer.length()) < 0) { |
b3148887 | 628 | L<<Logger::Error<<msgPrefix<<"Unable to forward update message to "<<remote.toStringWithPort()<<", error:"<<stringerror()<<endl; |
a7b68ae7 RG |
629 | try { |
630 | closesocket(sock); | |
631 | } | |
632 | catch(const PDNSException& e) { | |
633 | L<<Logger::Error<<"Error closing master forwarding socket after write() failed: "<<e.reason<<endl; | |
634 | } | |
b3148887 RA |
635 | continue; |
636 | } | |
637 | ||
638 | int res = waitForData(sock, 10, 0); | |
639 | if (!res) { | |
cc456024 | 640 | L<<Logger::Error<<msgPrefix<<"Timeout waiting for reply from master at "<<remote.toStringWithPort()<<endl; |
a7b68ae7 RG |
641 | try { |
642 | closesocket(sock); | |
643 | } | |
644 | catch(const PDNSException& e) { | |
645 | L<<Logger::Error<<"Error closing master forwarding socket after a timeout occured: "<<e.reason<<endl; | |
646 | } | |
b3148887 RA |
647 | continue; |
648 | } | |
649 | if (res < 0) { | |
650 | L<<Logger::Error<<msgPrefix<<"Error waiting for answer from master at "<<remote.toStringWithPort()<<", error:"<<stringerror()<<endl; | |
a7b68ae7 RG |
651 | try { |
652 | closesocket(sock); | |
653 | } | |
654 | catch(const PDNSException& e) { | |
655 | L<<Logger::Error<<"Error closing master forwarding socket after an error occured: "<<e.reason<<endl; | |
656 | } | |
b3148887 RA |
657 | continue; |
658 | } | |
659 | ||
660 | char lenBuf[2]; | |
661 | int recvRes; | |
662 | recvRes = recv(sock, &lenBuf, sizeof(lenBuf), 0); | |
663 | if (recvRes < 0) { | |
664 | L<<Logger::Error<<msgPrefix<<"Could not receive data (length) from master at "<<remote.toStringWithPort()<<", error:"<<stringerror()<<endl; | |
a7b68ae7 RG |
665 | try { |
666 | closesocket(sock); | |
667 | } | |
668 | catch(const PDNSException& e) { | |
669 | L<<Logger::Error<<"Error closing master forwarding socket after recv() failed: "<<e.reason<<endl; | |
670 | } | |
b3148887 RA |
671 | continue; |
672 | } | |
673 | int packetLen = lenBuf[0]*256+lenBuf[1]; | |
674 | ||
675 | ||
676 | char buf[packetLen]; | |
677 | recvRes = recv(sock, &buf, packetLen, 0); | |
678 | if (recvRes < 0) { | |
679 | L<<Logger::Error<<msgPrefix<<"Could not receive data (dnspacket) from master at "<<remote.toStringWithPort()<<", error:"<<stringerror()<<endl; | |
a7b68ae7 RG |
680 | try { |
681 | closesocket(sock); | |
682 | } | |
683 | catch(const PDNSException& e) { | |
684 | L<<Logger::Error<<"Error closing master forwarding socket after recv() failed: "<<e.reason<<endl; | |
685 | } | |
b3148887 RA |
686 | continue; |
687 | } | |
a7b68ae7 RG |
688 | try { |
689 | closesocket(sock); | |
690 | } | |
691 | catch(const PDNSException& e) { | |
692 | L<<Logger::Error<<"Error closing master forwarding socket: "<<e.reason<<endl; | |
693 | } | |
b3148887 RA |
694 | |
695 | try { | |
27c0050c | 696 | MOADNSParser mdp(false, buf, recvRes); |
b3148887 RA |
697 | L<<Logger::Info<<msgPrefix<<"Forward update message to "<<remote.toStringWithPort()<<", result was RCode "<<mdp.d_header.rcode<<endl; |
698 | return mdp.d_header.rcode; | |
699 | } | |
700 | catch (...) { | |
701 | L<<Logger::Error<<msgPrefix<<"Failed to parse response packet from master at "<<remote.toStringWithPort()<<endl; | |
702 | continue; | |
703 | } | |
704 | } | |
705 | L<<Logger::Error<<msgPrefix<<"Failed to forward packet to master(s). Returning ServFail."<<endl; | |
706 | return RCode::ServFail; | |
707 | ||
708 | } | |
709 | ||
f1b59a55 | 710 | int PacketHandler::processUpdate(DNSPacket *p) { |
d07bf7ff | 711 | if (! ::arg().mustDo("dnsupdate")) |
f1b59a55 | 712 | return RCode::Refused; |
914353ca | 713 | |
ded6b08d | 714 | string msgPrefix="UPDATE (" + itoa(p->d.id) + ") from " + p->getRemote().toString() + " for " + p->qdomain.toLogString() + ": "; |
f1b59a55 RA |
715 | L<<Logger::Info<<msgPrefix<<"Processing started."<<endl; |
716 | ||
0ecc1158 AT |
717 | // if there is policy, we delegate all checks to it |
718 | if (this->d_update_policy_lua == NULL) { | |
f1b59a55 | 719 | |
0ecc1158 AT |
720 | // Check permissions - IP based |
721 | vector<string> allowedRanges; | |
722 | B.getDomainMetadata(p->qdomain, "ALLOW-DNSUPDATE-FROM", allowedRanges); | |
723 | if (! ::arg()["allow-dnsupdate-from"].empty()) | |
724 | stringtok(allowedRanges, ::arg()["allow-dnsupdate-from"], ", \t" ); | |
f1b59a55 | 725 | |
0ecc1158 AT |
726 | NetmaskGroup ng; |
727 | for(vector<string>::const_iterator i=allowedRanges.begin(); i != allowedRanges.end(); i++) | |
728 | ng.addMask(*i); | |
914353ca | 729 | |
0ecc1158 AT |
730 | if ( ! ng.match(&p->d_remote)) { |
731 | L<<Logger::Error<<msgPrefix<<"Remote not listed in allow-dnsupdate-from or domainmetadata. Sending REFUSED"<<endl; | |
f1b59a55 RA |
732 | return RCode::Refused; |
733 | } | |
734 | ||
0ecc1158 AT |
735 | |
736 | // Check permissions - TSIG based. | |
737 | vector<string> tsigKeys; | |
738 | B.getDomainMetadata(p->qdomain, "TSIG-ALLOW-DNSUPDATE", tsigKeys); | |
739 | if (tsigKeys.size() > 0) { | |
740 | bool validKey = false; | |
741 | ||
742 | TSIGRecordContent trc; | |
743 | DNSName inputkey; | |
744 | string message; | |
745 | if (! p->getTSIGDetails(&trc, &inputkey, 0)) { | |
746 | L<<Logger::Error<<msgPrefix<<"TSIG key required, but packet does not contain key. Sending REFUSED"<<endl; | |
747 | return RCode::Refused; | |
6917c321 | 748 | } |
0ecc1158 AT |
749 | |
750 | if (p->d_tsig_algo == TSIG_GSS) { | |
751 | GssName inputname(p->d_peer_principal); // match against principal since GSS | |
752 | for(vector<string>::const_iterator key=tsigKeys.begin(); key != tsigKeys.end(); key++) { | |
753 | if (inputname.match(*key)) { | |
754 | validKey = true; | |
755 | break; | |
756 | } | |
757 | } | |
758 | } else { | |
759 | for(vector<string>::const_iterator key=tsigKeys.begin(); key != tsigKeys.end(); key++) { | |
760 | if (inputkey == DNSName(*key)) { // because checkForCorrectTSIG has already been performed earlier on, if the names of the ky match with the domain given. THis is valid. | |
761 | validKey=true; | |
762 | break; | |
763 | } | |
6917c321 AT |
764 | } |
765 | } | |
f1b59a55 | 766 | |
0ecc1158 AT |
767 | if (!validKey) { |
768 | L<<Logger::Error<<msgPrefix<<"TSIG key ("<<inputkey<<") required, but no matching key found in domainmetadata, tried "<<tsigKeys.size()<<". Sending REFUSED"<<endl; | |
769 | return RCode::Refused; | |
770 | } | |
f1b59a55 | 771 | } |
f1b59a55 | 772 | |
0ecc1158 AT |
773 | if (tsigKeys.size() == 0 && p->d_havetsig) |
774 | L<<Logger::Warning<<msgPrefix<<"TSIG is provided, but domain is not secured with TSIG. Processing continues"<<endl; | |
775 | ||
776 | } | |
f1b59a55 RA |
777 | |
778 | // RFC2136 uses the same DNS Header and Message as defined in RFC1035. | |
914353ca | 779 | // This means we can use the MOADNSParser to parse the incoming packet. The result is that we have some different |
f1b59a55 | 780 | // variable names during the use of our MOADNSParser. |
27c0050c | 781 | MOADNSParser mdp(false, p->getString()); |
f1b59a55 RA |
782 | if (mdp.d_header.qdcount != 1) { |
783 | L<<Logger::Warning<<msgPrefix<<"Zone Count is not 1, sending FormErr"<<endl; | |
784 | return RCode::FormErr; | |
914353ca | 785 | } |
f1b59a55 RA |
786 | |
787 | if (p->qtype.getCode() != QType::SOA) { // RFC2136 2.3 - ZTYPE must be SOA | |
788 | L<<Logger::Warning<<msgPrefix<<"Query ZTYPE is not SOA, sending FormErr"<<endl; | |
789 | return RCode::FormErr; | |
790 | } | |
791 | ||
792 | if (p->qclass != QClass::IN) { | |
793 | L<<Logger::Warning<<msgPrefix<<"Class is not IN, sending NotAuth"<<endl; | |
794 | return RCode::NotAuth; | |
795 | } | |
796 | ||
797 | DomainInfo di; | |
798 | di.backend=0; | |
799 | if(!B.getDomainInfo(p->qdomain, di) || !di.backend) { | |
f43c4448 | 800 | L<<Logger::Error<<msgPrefix<<"Can't determine backend for domain '"<<p->qdomain<<"' (or backend does not support DNS update operation)"<<endl; |
f1b59a55 RA |
801 | return RCode::NotAuth; |
802 | } | |
803 | ||
b3148887 RA |
804 | if (di.kind == DomainInfo::Slave) |
805 | return forwardPacket(msgPrefix, p, &di); | |
f1b59a55 | 806 | |
914353ca | 807 | // Check if all the records provided are within the zone |
f1b59a55 RA |
808 | for(MOADNSParser::answers_t::const_iterator i=mdp.d_answers.begin(); i != mdp.d_answers.end(); ++i) { |
809 | const DNSRecord *rr = &i->first; | |
810 | // Skip this check for other field types (like the TSIG - which is in the additional section) | |
dff32e09 | 811 | // For a TSIG, the label is the dnskey, so it does not pass the endOn validation. |
e693ff5a | 812 | if (! (rr->d_place == DNSResourceRecord::ANSWER || rr->d_place == DNSResourceRecord::AUTHORITY)) |
f1b59a55 RA |
813 | continue; |
814 | ||
f809c028 | 815 | if (!rr->d_name.isPartOf(di.zone)) { |
f1b59a55 RA |
816 | L<<Logger::Error<<msgPrefix<<"Received update/record out of zone, sending NotZone."<<endl; |
817 | return RCode::NotZone; | |
818 | } | |
819 | } | |
820 | ||
dff32e09 RA |
821 | |
822 | Lock l(&s_rfc2136lock); //TODO: i think this lock can be per zone, not for everything | |
f1b59a55 | 823 | L<<Logger::Info<<msgPrefix<<"starting transaction."<<endl; |
dff32e09 | 824 | if (!di.backend->startTransaction(p->qdomain, -1)) { // Not giving the domain_id means that we do not delete the existing records. |
f43c4448 | 825 | L<<Logger::Error<<msgPrefix<<"Backend for domain "<<p->qdomain<<" does not support transaction. Can't do Update packet."<<endl; |
f1b59a55 RA |
826 | return RCode::NotImp; |
827 | } | |
828 | ||
914353ca | 829 | // 3.2.1 and 3.2.2 - Prerequisite check |
f1b59a55 RA |
830 | for(MOADNSParser::answers_t::const_iterator i=mdp.d_answers.begin(); i != mdp.d_answers.end(); ++i) { |
831 | const DNSRecord *rr = &i->first; | |
e693ff5a | 832 | if (rr->d_place == DNSResourceRecord::ANSWER) { |
f1b59a55 RA |
833 | int res = checkUpdatePrerequisites(rr, &di); |
834 | if (res>0) { | |
835 | L<<Logger::Error<<msgPrefix<<"Failed PreRequisites check, returning "<<res<<endl; | |
836 | di.backend->abortTransaction(); | |
837 | return res; | |
838 | } | |
914353ca | 839 | } |
f1b59a55 RA |
840 | } |
841 | ||
842 | // 3.2.3 - Prerequisite check - this is outside of updatePrequisitesCheck because we check an RRSet and not the RR. | |
561434a6 | 843 | typedef pair<DNSName, QType> rrSetKey_t; |
f1b59a55 RA |
844 | typedef vector<DNSResourceRecord> rrVector_t; |
845 | typedef std::map<rrSetKey_t, rrVector_t> RRsetMap_t; | |
846 | RRsetMap_t preReqRRsets; | |
847 | for(MOADNSParser::answers_t::const_iterator i=mdp.d_answers.begin(); i != mdp.d_answers.end(); ++i) { | |
848 | const DNSRecord *rr = &i->first; | |
e693ff5a | 849 | if (rr->d_place == DNSResourceRecord::ANSWER) { |
f1b59a55 | 850 | // Last line of 3.2.3 |
914353ca | 851 | if (rr->d_class != QClass::IN && rr->d_class != QClass::NONE && rr->d_class != QClass::ANY) |
f1b59a55 RA |
852 | return RCode::FormErr; |
853 | ||
854 | if (rr->d_class == QClass::IN) { | |
f809c028 | 855 | rrSetKey_t key = make_pair(rr->d_name, QType(rr->d_type)); |
f1b59a55 RA |
856 | rrVector_t *vec = &preReqRRsets[key]; |
857 | vec->push_back(DNSResourceRecord(*rr)); | |
858 | } | |
859 | } | |
860 | } | |
861 | ||
862 | if (preReqRRsets.size() > 0) { | |
863 | RRsetMap_t zoneRRsets; | |
864 | for (RRsetMap_t::iterator preRRSet = preReqRRsets.begin(); preRRSet != preReqRRsets.end(); ++preRRSet) { | |
865 | rrSetKey_t rrSet=preRRSet->first; | |
866 | rrVector_t *vec = &preRRSet->second; | |
867 | ||
868 | DNSResourceRecord rec; | |
869 | di.backend->lookup(QType(QType::ANY), rrSet.first); | |
870 | uint16_t foundRR=0, matchRR=0; | |
871 | while (di.backend->get(rec)) { | |
872 | if (rec.qtype == rrSet.second) { | |
873 | foundRR++; | |
874 | for(rrVector_t::iterator rrItem=vec->begin(); rrItem != vec->end(); ++rrItem) { | |
875 | rrItem->ttl = rec.ttl; // The compare one line below also compares TTL, so we make them equal because TTL is not user within prerequisite checks. | |
914353ca | 876 | if (*rrItem == rec) |
f1b59a55 RA |
877 | matchRR++; |
878 | } | |
879 | } | |
880 | } | |
881 | if (matchRR != foundRR || foundRR != vec->size()) { | |
882 | L<<Logger::Error<<msgPrefix<<"Failed PreRequisites check, returning NXRRSet"<<endl; | |
883 | di.backend->abortTransaction(); | |
884 | return RCode::NXRRSet; | |
885 | } | |
886 | } | |
887 | } | |
888 | ||
889 | ||
890 | ||
0bb68041 | 891 | // 3.4 - Prescan & Add/Update/Delete records - is all done within a try block. |
f1b59a55 | 892 | try { |
d0d273cf | 893 | uint changedRecords = 0; |
f1b59a55 RA |
894 | // 3.4.1 - Prescan section |
895 | for(MOADNSParser::answers_t::const_iterator i=mdp.d_answers.begin(); i != mdp.d_answers.end(); ++i) { | |
896 | const DNSRecord *rr = &i->first; | |
e693ff5a | 897 | if (rr->d_place == DNSResourceRecord::AUTHORITY) { |
f1b59a55 RA |
898 | int res = checkUpdatePrescan(rr); |
899 | if (res>0) { | |
900 | L<<Logger::Error<<msgPrefix<<"Failed prescan check, returning "<<res<<endl; | |
901 | di.backend->abortTransaction(); | |
902 | return res; | |
903 | } | |
904 | } | |
905 | } | |
906 | ||
907 | bool updatedSerial=false; | |
908 | NSEC3PARAMRecordContent ns3pr; | |
914353ca | 909 | bool narrow=false; |
f1b59a55 | 910 | bool haveNSEC3 = d_dk.getNSEC3PARAM(di.zone, &ns3pr, &narrow); |
dff32e09 | 911 | bool isPresigned = d_dk.isPresigned(di.zone); |
f1b59a55 | 912 | |
f1b59a55 RA |
913 | // 3.4.2 - Perform the updates. |
914 | // There's a special condition where deleting the last NS record at zone apex is never deleted (3.4.2.4) | |
7c696097 | 915 | // This means we must do it outside the normal performUpdate() because that focusses only on a separate RR. |
f1b59a55 RA |
916 | vector<const DNSRecord *> nsRRtoDelete; |
917 | for(MOADNSParser::answers_t::const_iterator i=mdp.d_answers.begin(); i != mdp.d_answers.end(); ++i) { | |
918 | const DNSRecord *rr = &i->first; | |
e693ff5a | 919 | if (rr->d_place == DNSResourceRecord::AUTHORITY) { |
0ecc1158 AT |
920 | /* see if it's permitted by policy */ |
921 | if (this->d_update_policy_lua != NULL) { | |
922 | if (this->d_update_policy_lua->updatePolicy(rr->d_name, QType(rr->d_type), di.zone, p) == false) { | |
923 | L<<Logger::Warning<<msgPrefix<<"Refusing update for " << rr->d_name << "/" << QType(rr->d_type).getName() << ": Not permitted by policy"<<endl; | |
924 | continue; | |
925 | } else { | |
926 | L<<Logger::Debug<<msgPrefix<<"Accepting update for " << rr->d_name << "/" << QType(rr->d_type).getName() << ": Permitted by policy"<<endl; | |
927 | } | |
928 | } | |
929 | ||
f809c028 | 930 | if (rr->d_class == QClass::NONE && rr->d_type == QType::NS && rr->d_name == di.zone) |
f1b59a55 RA |
931 | nsRRtoDelete.push_back(rr); |
932 | else | |
d0d273cf | 933 | changedRecords += performUpdate(msgPrefix, rr, &di, isPresigned, &narrow, &haveNSEC3, &ns3pr, &updatedSerial); |
f1b59a55 RA |
934 | } |
935 | } | |
936 | if (nsRRtoDelete.size()) { | |
937 | vector<DNSResourceRecord> nsRRInZone; | |
938 | DNSResourceRecord rec; | |
939 | di.backend->lookup(QType(QType::NS), di.zone); | |
940 | while (di.backend->get(rec)) { | |
941 | nsRRInZone.push_back(rec); | |
942 | } | |
943 | if (nsRRInZone.size() > nsRRtoDelete.size()) { // only delete if the NS's we delete are less then what we have in the zone (3.4.2.4) | |
944 | for (vector<DNSResourceRecord>::iterator inZone=nsRRInZone.begin(); inZone != nsRRInZone.end(); inZone++) { | |
945 | for (vector<const DNSRecord *>::iterator rr=nsRRtoDelete.begin(); rr != nsRRtoDelete.end(); rr++) { | |
946 | if (inZone->getZoneRepresentation() == (*rr)->d_content->getZoneRepresentation()) | |
d0d273cf | 947 | changedRecords += performUpdate(msgPrefix, *rr, &di, isPresigned, &narrow, &haveNSEC3, &ns3pr, &updatedSerial); |
f1b59a55 RA |
948 | } |
949 | } | |
950 | } | |
951 | } | |
952 | ||
f1b59a55 | 953 | // Section 3.6 - Update the SOA serial - outside of performUpdate because we do a SOA update for the complete update message |
d0d273cf | 954 | if (changedRecords > 0 && !updatedSerial) { |
166ac305 | 955 | increaseSerial(msgPrefix, &di, haveNSEC3, narrow, &ns3pr); |
d0d273cf | 956 | changedRecords++; |
890c7124 RA |
957 | } |
958 | ||
d0d273cf | 959 | if (changedRecords > 0) { |
dce6b818 RA |
960 | if (!di.backend->commitTransaction()) { |
961 | L<<Logger::Error<<msgPrefix<<"Failed to commit updates!"<<endl; | |
962 | return RCode::ServFail; | |
963 | } | |
914353ca | 964 | |
71f758e0 | 965 | S.deposit("dnsupdate-changes", changedRecords); |
7facf345 | 966 | |
dce6b818 | 967 | // Purge the records! |
7abbc40f | 968 | string zone(di.zone.toString()); |
dce6b818 RA |
969 | zone.append("$"); |
970 | PC.purge(zone); | |
0bb68041 | 971 | |
7c696097 | 972 | L<<Logger::Info<<msgPrefix<<"Update completed, "<<changedRecords<<" changed records committed."<<endl; |
dce6b818 RA |
973 | } else { |
974 | //No change, no commit, we perform abort() because some backends might like this more. | |
975 | L<<Logger::Info<<msgPrefix<<"Update completed, 0 changes, rolling back."<<endl; | |
976 | di.backend->abortTransaction(); | |
977 | } | |
0bb68041 RA |
978 | return RCode::NoError; //rfc 2136 3.4.2.5 |
979 | } | |
980 | catch (SSqlException &e) { | |
981 | L<<Logger::Error<<msgPrefix<<"Caught SSqlException: "<<e.txtReason()<<"; Sending ServFail!"<<endl; | |
982 | di.backend->abortTransaction(); | |
983 | return RCode::ServFail; | |
f1b59a55 | 984 | } |
ee9ef8f2 RA |
985 | catch (DBException &e) { |
986 | L<<Logger::Error<<msgPrefix<<"Caught DBException: "<<e.reason<<"; Sending ServFail!"<<endl; | |
987 | di.backend->abortTransaction(); | |
988 | return RCode::ServFail; | |
989 | } | |
05ff9dab RA |
990 | catch (PDNSException &e) { |
991 | L<<Logger::Error<<msgPrefix<<"Caught PDNSException: "<<e.reason<<"; Sending ServFail!"<<endl; | |
f1b59a55 RA |
992 | di.backend->abortTransaction(); |
993 | return RCode::ServFail; | |
994 | } | |
28b66a94 KM |
995 | catch(std::exception &e) { |
996 | L<<Logger::Error<<msgPrefix<<"Caught std:exception: "<<e.what()<<"; Sending ServFail!"<<endl; | |
997 | di.backend->abortTransaction(); | |
998 | return RCode::ServFail; | |
999 | } | |
f1b59a55 RA |
1000 | catch (...) { |
1001 | L<<Logger::Error<<msgPrefix<<"Caught unknown exception when performing update. Sending ServFail!"<<endl; | |
1002 | di.backend->abortTransaction(); | |
1003 | return RCode::ServFail; | |
1004 | } | |
f1b59a55 RA |
1005 | } |
1006 | ||
166ac305 | 1007 | void PacketHandler::increaseSerial(const string &msgPrefix, const DomainInfo *di, bool haveNSEC3, bool narrow, const NSEC3PARAMRecordContent *ns3pr) { |
f1b59a55 | 1008 | DNSResourceRecord rec, newRec; |
166ac305 | 1009 | di->backend->lookup(QType(QType::SOA), di->zone); |
f1b59a55 | 1010 | bool foundSOA=false; |
166ac305 | 1011 | while (di->backend->get(rec)) { |
f1b59a55 RA |
1012 | newRec = rec; |
1013 | foundSOA=true; | |
1014 | } | |
1015 | if (!foundSOA) { | |
05ff9dab | 1016 | throw PDNSException("SOA-Serial update failed because there was no SOA. Wowie."); |
f1b59a55 RA |
1017 | } |
1018 | SOAData soa2Update; | |
1019 | fillSOAData(rec.content, soa2Update); | |
cd9ec356 | 1020 | uint32_t oldSerial = soa2Update.serial; |
f1b59a55 | 1021 | |
e31f9680 RA |
1022 | if (oldSerial == 0) { // using Autoserial, leave the serial alone. |
1023 | L<<Logger::Notice<<msgPrefix<<"AutoSerial being used, not updating SOA serial."<<endl; | |
1024 | return; | |
1025 | } | |
1026 | ||
f1b59a55 | 1027 | vector<string> soaEdit2136Setting; |
71f758e0 | 1028 | B.getDomainMetadata(di->zone, "SOA-EDIT-DNSUPDATE", soaEdit2136Setting); |
f1b59a55 RA |
1029 | string soaEdit2136 = "DEFAULT"; |
1030 | string soaEdit; | |
1031 | if (!soaEdit2136Setting.empty()) { | |
1032 | soaEdit2136 = soaEdit2136Setting[0]; | |
1033 | if (pdns_iequals(soaEdit2136, "SOA-EDIT") || pdns_iequals(soaEdit2136,"SOA-EDIT-INCREASE") ){ | |
4192773a KM |
1034 | string soaEditSetting; |
1035 | d_dk.getSoaEdit(di->zone, soaEditSetting); | |
f1b59a55 | 1036 | if (soaEditSetting.empty()) { |
fc721f52 | 1037 | L<<Logger::Error<<msgPrefix<<"Using "<<soaEdit2136<<" for SOA-EDIT-DNSUPDATE increase on DNS update, but SOA-EDIT is not set for domain \""<< di->zone <<"\". Using DEFAULT for SOA-EDIT-DNSUPDATE"<<endl; |
f1b59a55 RA |
1038 | soaEdit2136 = "DEFAULT"; |
1039 | } else | |
4192773a | 1040 | soaEdit = soaEditSetting; |
f1b59a55 RA |
1041 | } |
1042 | } | |
1043 | ||
effecfa7 | 1044 | soa2Update.serial = calculateIncreaseSOA(soa2Update, soaEdit2136, soaEdit); |
f1b59a55 RA |
1045 | |
1046 | newRec.content = serializeSOAData(soa2Update); | |
3e0ab216 RA |
1047 | vector<DNSResourceRecord> rrset; |
1048 | rrset.push_back(newRec); | |
166ac305 | 1049 | di->backend->replaceRRSet(di->id, newRec.qname, newRec.qtype, rrset); |
dff32e09 | 1050 | L<<Logger::Notice<<msgPrefix<<"Increasing SOA serial ("<<oldSerial<<" -> "<<soa2Update.serial<<")"<<endl; |
166ac305 RA |
1051 | |
1052 | //Correct ordername + auth flag | |
c1c3e5a4 | 1053 | if (haveNSEC3 && narrow) |
96e63d77 | 1054 | di->backend->updateDNSSECOrderNameAndAuth(di->id, newRec.qname, DNSName(), true); |
c1c3e5a4 | 1055 | else if (haveNSEC3) { |
8de4e1d7 | 1056 | DNSName ordername; |
c1c3e5a4 | 1057 | if (!narrow) |
96e63d77 | 1058 | ordername = DNSName(toBase32Hex(hashQNameWithSalt(*ns3pr, newRec.qname))); |
c1c3e5a4 | 1059 | |
96e63d77 KM |
1060 | di->backend->updateDNSSECOrderNameAndAuth(di->id, newRec.qname, ordername, true); |
1061 | } | |
1062 | else { // NSEC | |
1063 | DNSName ordername=newRec.qname.makeRelative(di->zone); | |
1064 | di->backend->updateDNSSECOrderNameAndAuth(di->id, newRec.qname, ordername, true); | |
166ac305 | 1065 | } |
166ac305 | 1066 | } |