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Commit | Line | Data |
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288f4aa9 | 1 | /* |
6edbf68a PL |
2 | * This file is part of PowerDNS or dnsdist. |
3 | * Copyright -- PowerDNS.COM B.V. and its contributors | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of version 2 of the GNU General Public License as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * In addition, for the avoidance of any doubt, permission is granted to | |
10 | * link this program with OpenSSL and to (re)distribute the binaries | |
11 | * produced as the result of such linking. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
21 | */ | |
870a0fe4 AT |
22 | #ifdef HAVE_CONFIG_H |
23 | #include "config.h" | |
24 | #endif | |
3e61e7f7 | 25 | |
76473b92 KM |
26 | #include <netdb.h> |
27 | #include <sys/stat.h> | |
28 | #include <unistd.h> | |
f097141b | 29 | #ifdef HAVE_BOOST_CONTAINER_FLAT_SET_HPP |
b47026fd | 30 | #include <boost/container/flat_set.hpp> |
f097141b | 31 | #endif |
2470b36e | 32 | #include "ws-recursor.hh" |
49a699c4 | 33 | #include <pthread.h> |
3ea54bf0 | 34 | #include "recpacketcache.hh" |
3ddb9247 | 35 | #include "utility.hh" |
51e2144e | 36 | #include "dns_random.hh" |
d1b28475 KM |
37 | #ifdef HAVE_LIBSODIUM |
38 | #include <sodium.h> | |
39 | #endif | |
3afde9b2 | 40 | #include "opensslsigners.hh" |
288f4aa9 BH |
41 | #include <iostream> |
42 | #include <errno.h> | |
81859ba5 | 43 | #include <boost/static_assert.hpp> |
288f4aa9 BH |
44 | #include <map> |
45 | #include <set> | |
97bb160b | 46 | #include "recursor_cache.hh" |
38c9ceaa | 47 | #include "cachecleaner.hh" |
288f4aa9 | 48 | #include <stdio.h> |
c75a6a9e | 49 | #include <signal.h> |
288f4aa9 | 50 | #include <stdlib.h> |
bb4bdbaf | 51 | #include "misc.hh" |
288f4aa9 BH |
52 | #include "mtasker.hh" |
53 | #include <utility> | |
288f4aa9 BH |
54 | #include "arguments.hh" |
55 | #include "syncres.hh" | |
88def049 BH |
56 | #include <fcntl.h> |
57 | #include <fstream> | |
3e61e7f7 | 58 | #include "sortlist.hh" |
5c633640 BH |
59 | #include "sstuff.hh" |
60 | #include <boost/tuple/tuple.hpp> | |
61 | #include <boost/tuple/tuple_comparison.hpp> | |
72df400f | 62 | #include <boost/shared_array.hpp> |
7f1fa77d | 63 | #include <boost/function.hpp> |
5605c067 | 64 | #include <boost/algorithm/string.hpp> |
8f7473d7 | 65 | #ifdef MALLOC_TRACE |
66 | #include "malloctrace.hh" | |
67 | #endif | |
40a3dd64 | 68 | #include <netinet/tcp.h> |
ea634573 BH |
69 | #include "dnsparser.hh" |
70 | #include "dnswriter.hh" | |
71 | #include "dnsrecords.hh" | |
f814d7c8 | 72 | #include "zoneparser-tng.hh" |
1d5b3ce6 | 73 | #include "rec_channel.hh" |
aaacf7f2 | 74 | #include "logger.hh" |
c8ddb7c2 | 75 | #include "iputils.hh" |
09e6702a | 76 | #include "mplexer.hh" |
c038218b | 77 | #include "config.h" |
808c5ef7 | 78 | #include "lua-recursor4.hh" |
ba1a571d | 79 | #include "version.hh" |
79332bff | 80 | #include "responsestats.hh" |
d67620e4 | 81 | #include "secpoll-recursor.hh" |
c5c066bf | 82 | #include "dnsname.hh" |
644dd1da | 83 | #include "filterpo.hh" |
84 | #include "rpzloader.hh" | |
b3f0ed10 | 85 | #include "validate-recursor.hh" |
f3c18728 | 86 | #include "rec-lua-conf.hh" |
5c3b5e7f | 87 | #include "ednsoptions.hh" |
85c7ca75 | 88 | #include "gettime.hh" |
af1377b7 NC |
89 | #ifdef NOD_ENABLED |
90 | #include "nod.hh" | |
91 | #endif /* NOD_ENABLED */ | |
f3c18728 | 92 | |
d9d3f9c1 | 93 | #include "rec-protobuf.hh" |
d705aad9 | 94 | #include "rec-snmp.hh" |
aa7929a3 | 95 | |
6b6720de PL |
96 | #ifdef HAVE_SYSTEMD |
97 | #include <systemd/sd-daemon.h> | |
98 | #endif | |
99 | ||
d187038c RG |
100 | #include "namespaces.hh" |
101 | ||
5cc8371b RG |
102 | #include "xpf.hh" |
103 | ||
d187038c RG |
104 | typedef map<ComboAddress, uint32_t, ComboAddress::addressOnlyLessThan> tcpClientCounts_t; |
105 | ||
f26bf547 | 106 | static thread_local std::shared_ptr<RecursorLua4> t_pdl; |
b243ca3b | 107 | static thread_local unsigned int t_id = 0; |
f26bf547 RG |
108 | static thread_local std::shared_ptr<Regex> t_traceRegex; |
109 | static thread_local std::unique_ptr<tcpClientCounts_t> t_tcpClientCounts; | |
63341e8d RG |
110 | #ifdef HAVE_PROTOBUF |
111 | static thread_local std::shared_ptr<RemoteLogger> t_protobufServer{nullptr}; | |
112 | static thread_local std::shared_ptr<RemoteLogger> t_outgoingProtobufServer{nullptr}; | |
113 | #endif /* HAVE_PROTOBUF */ | |
f26bf547 RG |
114 | |
115 | thread_local std::unique_ptr<MT_t> MT; // the big MTasker | |
116 | thread_local std::unique_ptr<MemRecursorCache> t_RC; | |
117 | thread_local std::unique_ptr<RecursorPacketCache> t_packetCache; | |
3337c2f7 | 118 | thread_local FDMultiplexer* t_fdm{nullptr}; |
be9078b3 | 119 | thread_local std::unique_ptr<addrringbuf_t> t_remotes, t_servfailremotes, t_largeanswerremotes, t_bogusremotes; |
66f2e6ad | 120 | thread_local std::unique_ptr<boost::circular_buffer<pair<DNSName, uint16_t> > > t_queryring, t_servfailqueryring, t_bogusqueryring; |
f26bf547 | 121 | thread_local std::shared_ptr<NetmaskGroup> t_allowFrom; |
aa7929a3 | 122 | #ifdef HAVE_PROTOBUF |
f26bf547 | 123 | thread_local std::unique_ptr<boost::uuids::random_generator> t_uuidGenerator; |
aa7929a3 | 124 | #endif |
af1377b7 NC |
125 | #ifdef NOD_ENABLED |
126 | thread_local std::shared_ptr<nod::NODDB> t_nodDBp; | |
127 | #endif /* NOD_ENABLED */ | |
d187038c | 128 | __thread struct timeval g_now; // timestamp, updated (too) frequently |
d7dae798 | 129 | |
b243ca3b RG |
130 | typedef vector<pair<int, function< void(int, any&) > > > deferredAdd_t; |
131 | ||
d7dae798 | 132 | // for communicating with our threads |
b243ca3b RG |
133 | // effectively readonly after startup |
134 | struct RecThreadInfo | |
135 | { | |
136 | struct ThreadPipeSet | |
137 | { | |
138 | int writeToThread{-1}; | |
139 | int readToThread{-1}; | |
140 | int writeFromThread{-1}; | |
141 | int readFromThread{-1}; | |
142 | int writeQueriesToThread{-1}; // this one is non-blocking | |
143 | int readQueriesToThread{-1}; | |
144 | }; | |
145 | ||
adb6cd72 | 146 | /* FD corresponding to TCP sockets this thread is listening |
c47f201b | 147 | on. |
adb6cd72 RG |
148 | These FDs are also in deferredAdds when we have one |
149 | socket per listener, and in g_deferredAdds instead. */ | |
150 | std::set<int> tcpSockets; | |
b243ca3b RG |
151 | /* FD corresponding to listening sockets if we have one socket per |
152 | listener (with reuseport), otherwise all listeners share the | |
153 | same FD and g_deferredAdds is then used instead */ | |
154 | deferredAdd_t deferredAdds; | |
155 | struct ThreadPipeSet pipes; | |
156 | std::thread thread; | |
157 | /* handle the web server, carbon, statistics and the control channel */ | |
158 | bool isHandler{false}; | |
159 | /* accept incoming queries (and distributes them to the workers if pdns-distributes-queries is set) */ | |
160 | bool isListener{false}; | |
161 | /* process queries */ | |
162 | bool isWorker{false}; | |
49a699c4 | 163 | }; |
810ff705 | 164 | |
b243ca3b RG |
165 | /* first we have the handler thread, t_id == 0 (some other |
166 | helper threads like SNMP might have t_id == 0 as well) | |
167 | then the distributor threads if any | |
168 | and finally the workers */ | |
169 | static std::vector<RecThreadInfo> s_threadInfos; | |
170 | /* without reuseport, all listeners share the same sockets */ | |
171 | static deferredAdd_t g_deferredAdds; | |
faf580f5 | 172 | |
d187038c RG |
173 | typedef vector<int> tcpListenSockets_t; |
174 | typedef map<int, ComboAddress> listenSocketsAddresses_t; // is shared across all threads right now | |
3ea54bf0 | 175 | |
d187038c | 176 | static const ComboAddress g_local4("0.0.0.0"), g_local6("::"); |
d187038c | 177 | static listenSocketsAddresses_t g_listenSocketsAddresses; // is shared across all threads right now |
d187038c RG |
178 | static set<int> g_fromtosockets; // listen sockets that use 'sendfromto()' mechanism |
179 | static vector<ComboAddress> g_localQueryAddresses4, g_localQueryAddresses6; | |
180 | static AtomicCounter counter; | |
9065eb05 | 181 | static std::shared_ptr<SyncRes::domainmap_t> g_initialDomainMap; // new threads needs this to be setup |
f26bf547 | 182 | static std::shared_ptr<NetmaskGroup> g_initialAllowFrom; // new thread needs to be setup with this |
5cc8371b | 183 | static NetmaskGroup g_XPFAcl; |
d187038c | 184 | static size_t g_tcpMaxQueriesPerConn; |
a5886e6a | 185 | static size_t s_maxUDPQueriesPerRound; |
d187038c RG |
186 | static uint64_t g_latencyStatSize; |
187 | static uint32_t g_disthashseed; | |
188 | static unsigned int g_maxTCPPerClient; | |
d187038c | 189 | static unsigned int g_maxMThreads; |
b243ca3b | 190 | static unsigned int g_numDistributorThreads; |
d187038c RG |
191 | static unsigned int g_numWorkerThreads; |
192 | static int g_tcpTimeout; | |
193 | static uint16_t g_udpTruncationThreshold; | |
59cb4a79 | 194 | static uint16_t g_xpfRRCode{0}; |
d187038c RG |
195 | static std::atomic<bool> statsWanted; |
196 | static std::atomic<bool> g_quiet; | |
197 | static bool g_logCommonErrors; | |
198 | static bool g_anyToTcp; | |
b243ca3b | 199 | static bool g_weDistributeQueries; // if true, 1 or more threads listen on the incoming query sockets and distribute them to workers |
810ff705 | 200 | static bool g_reusePort{false}; |
00b8cadc | 201 | static bool g_gettagNeedsEDNSOptions{false}; |
0ec489bf | 202 | static time_t g_statisticsInterval; |
9065eb05 | 203 | static bool g_useIncomingECS; |
a6f7f5fe | 204 | std::atomic<uint32_t> g_maxCacheEntries, g_maxPacketCacheEntries; |
af1377b7 NC |
205 | #ifdef NOD_ENABLED |
206 | static bool g_nodEnabled; | |
207 | static DNSName g_nodLookupDomain; | |
208 | static bool g_nodLog; | |
209 | static SuffixMatchNode g_nodDomainWL; | |
210 | #endif /* NOD_ENABLED */ | |
f097141b | 211 | #ifdef HAVE_BOOST_CONTAINER_FLAT_SET_HPP |
bf6f28ca | 212 | static boost::container::flat_set<uint16_t> s_avoidUdpSourcePorts; |
f097141b CHB |
213 | #else |
214 | static std::set<uint16_t> s_avoidUdpSourcePorts; | |
215 | #endif | |
bf6f28ca CHB |
216 | static uint16_t s_minUdpSourcePort; |
217 | static uint16_t s_maxUdpSourcePort; | |
49a699c4 | 218 | |
b243ca3b | 219 | RecursorControlChannel s_rcc; // only active in the handler thread |
d187038c | 220 | RecursorStats g_stats; |
2d733c0f | 221 | string s_programname="pdns_recursor"; |
d187038c | 222 | string s_pidfname; |
c1c29961 | 223 | bool g_lowercaseOutgoing; |
bf19ccfd | 224 | unsigned int g_networkTimeoutMsec; |
d187038c RG |
225 | unsigned int g_numThreads; |
226 | uint16_t g_outgoingEDNSBufsize; | |
98d36505 | 227 | bool g_logRPZChanges{false}; |
c3828c03 | 228 | |
12cd44ee | 229 | #define LOCAL_NETS "127.0.0.0/8, 10.0.0.0/8, 100.64.0.0/10, 169.254.0.0/16, 192.168.0.0/16, 172.16.0.0/12, ::1/128, fc00::/7, fe80::/10" |
2fe3354d | 230 | #define LOCAL_NETS_INVERSE "!127.0.0.0/8, !10.0.0.0/8, !100.64.0.0/10, !169.254.0.0/16, !192.168.0.0/16, !172.16.0.0/12, !::1/128, !fc00::/7, !fe80::/10" |
12cd44ee | 231 | // Bad Nets taken from both: |
3ddb9247 | 232 | // http://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml |
12cd44ee | 233 | // and |
234 | // http://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml | |
235 | // where such a network may not be considered a valid destination | |
236 | #define BAD_NETS "0.0.0.0/8, 192.0.0.0/24, 192.0.2.0/24, 198.51.100.0/24, 203.0.113.0/24, 240.0.0.0/4, ::/96, ::ffff:0:0/96, 100::/64, 2001:db8::/32" | |
237 | #define DONT_QUERY LOCAL_NETS ", " BAD_NETS | |
49a699c4 | 238 | |
d7dae798 | 239 | //! used to send information to a newborn mthread |
ea634573 | 240 | struct DNSComboWriter { |
78f56b38 | 241 | DNSComboWriter(const std::string& query, const struct timeval& now): d_mdp(true, query), d_now(now) |
2749c3fe RG |
242 | { |
243 | } | |
5cc8371b | 244 | |
78f56b38 | 245 | DNSComboWriter(const std::string& query, const struct timeval& now, std::vector<std::string>&& policyTags, LuaContext::LuaObject&& data): d_mdp(true, query), d_now(now), d_policyTags(std::move(policyTags)), d_data(std::move(data)) |
5164bac3 RG |
246 | { |
247 | } | |
248 | ||
5cc8371b RG |
249 | void setRemote(const ComboAddress& sa) |
250 | { | |
251 | d_remote=sa; | |
252 | } | |
253 | ||
254 | void setSource(const ComboAddress& sa) | |
ea634573 | 255 | { |
5cc8371b | 256 | d_source=sa; |
ea634573 BH |
257 | } |
258 | ||
b71b60ee | 259 | void setLocal(const ComboAddress& sa) |
260 | { | |
261 | d_local=sa; | |
262 | } | |
263 | ||
5cc8371b RG |
264 | void setDestination(const ComboAddress& sa) |
265 | { | |
266 | d_destination=sa; | |
267 | } | |
b71b60ee | 268 | |
ea634573 BH |
269 | void setSocket(int sock) |
270 | { | |
271 | d_socket=sock; | |
272 | } | |
a1754c6a BH |
273 | |
274 | string getRemote() const | |
275 | { | |
5cc8371b RG |
276 | if (d_source == d_remote) { |
277 | return d_source.toStringWithPort(); | |
278 | } | |
279 | return d_source.toStringWithPort() + " (proxied by " + d_remote.toStringWithPort() + ")"; | |
a1754c6a BH |
280 | } |
281 | ||
5cc8371b | 282 | MOADNSParser d_mdp; |
c9e9e5e0 | 283 | struct timeval d_now; |
5cc8371b RG |
284 | /* Remote client, might differ from d_source |
285 | in case of XPF, in which case d_source holds | |
286 | the IP of the client and d_remote of the proxy | |
287 | */ | |
288 | ComboAddress d_remote; | |
289 | ComboAddress d_source; | |
290 | /* Destination address, might differ from | |
291 | d_destination in case of XPF, in which case | |
292 | d_destination holds the IP of the proxy and | |
293 | d_local holds our own. */ | |
294 | ComboAddress d_local; | |
295 | ComboAddress d_destination; | |
aa7929a3 RG |
296 | #ifdef HAVE_PROTOBUF |
297 | boost::uuids::uuid d_uuid; | |
67e31ebe | 298 | string d_requestorId; |
590388d2 | 299 | string d_deviceId; |
aa7929a3 | 300 | #endif |
5164bac3 RG |
301 | std::vector<std::string> d_policyTags; |
302 | LuaContext::LuaObject d_data; | |
b40562da | 303 | EDNSSubnetOpts d_ednssubnet; |
5164bac3 | 304 | shared_ptr<TCPConnection> d_tcpConnection; |
ea634573 | 305 | int d_socket; |
b673817a | 306 | unsigned int d_tag{0}; |
e9f63d47 | 307 | uint32_t d_qhash{0}; |
70fb28d9 RG |
308 | uint32_t d_ttlCap{std::numeric_limits<uint32_t>::max()}; |
309 | bool d_variable{false}; | |
5164bac3 RG |
310 | bool d_ecsFound{false}; |
311 | bool d_ecsParsed{false}; | |
312 | bool d_tcp; | |
ea634573 BH |
313 | }; |
314 | ||
06857845 RG |
315 | MT_t* getMT() |
316 | { | |
317 | return MT ? MT.get() : nullptr; | |
318 | } | |
ea634573 | 319 | |
288f4aa9 BH |
320 | ArgvMap &arg() |
321 | { | |
322 | static ArgvMap theArg; | |
323 | return theArg; | |
324 | } | |
4ef015cd | 325 | |
8fb594ba | 326 | unsigned int getRecursorThreadId() |
b4015453 | 327 | { |
30da2030 | 328 | return t_id; |
b4015453 | 329 | } |
09e6702a | 330 | |
30ee601a RG |
331 | int getMTaskerTID() |
332 | { | |
333 | return MT->getTid(); | |
334 | } | |
335 | ||
b243ca3b RG |
336 | static bool isDistributorThread() |
337 | { | |
338 | if (t_id == 0) { | |
339 | return false; | |
340 | } | |
341 | ||
342 | return g_weDistributeQueries && s_threadInfos.at(t_id).isListener; | |
343 | } | |
344 | ||
345 | static bool isHandlerThread() | |
346 | { | |
347 | if (t_id == 0) { | |
348 | return true; | |
349 | } | |
350 | ||
351 | return s_threadInfos.at(t_id).isHandler; | |
352 | } | |
353 | ||
d187038c | 354 | static void handleTCPClientWritable(int fd, FDMultiplexer::funcparam_t& var); |
09e6702a | 355 | |
50c81227 | 356 | // -1 is error, 0 is timeout, 1 is success |
3ddb9247 | 357 | int asendtcp(const string& data, Socket* sock) |
5c633640 BH |
358 | { |
359 | PacketID pident; | |
360 | pident.sock=sock; | |
361 | pident.outMSG=data; | |
3ddb9247 | 362 | |
bb4bdbaf | 363 | t_fdm->addWriteFD(sock->getHandle(), handleTCPClientWritable, pident); |
50c81227 | 364 | string packet; |
5c633640 | 365 | |
5b0ddd18 | 366 | int ret=MT->waitEvent(pident, &packet, g_networkTimeoutMsec); |
23db0a09 | 367 | |
9170fbaf | 368 | if(!ret || ret==-1) { // timeout |
bb4bdbaf | 369 | t_fdm->removeWriteFD(sock->getHandle()); |
5c633640 | 370 | } |
50c81227 BH |
371 | else if(packet.size() !=data.size()) { // main loop tells us what it sent out, or empty in case of an error |
372 | return -1; | |
373 | } | |
9170fbaf | 374 | return ret; |
5c633640 BH |
375 | } |
376 | ||
d187038c | 377 | static void handleTCPClientReadable(int fd, FDMultiplexer::funcparam_t& var); |
09e6702a | 378 | |
9170fbaf | 379 | // -1 is error, 0 is timeout, 1 is success |
a683e8bd | 380 | int arecvtcp(string& data, size_t len, Socket* sock, bool incompleteOkay) |
288f4aa9 | 381 | { |
50c81227 | 382 | data.clear(); |
5c633640 BH |
383 | PacketID pident; |
384 | pident.sock=sock; | |
385 | pident.inNeeded=len; | |
825fa717 | 386 | pident.inIncompleteOkay=incompleteOkay; |
bb4bdbaf | 387 | t_fdm->addReadFD(sock->getHandle(), handleTCPClientReadable, pident); |
5c633640 | 388 | |
bb4bdbaf | 389 | int ret=MT->waitEvent(pident,&data, g_networkTimeoutMsec); |
9170fbaf | 390 | if(!ret || ret==-1) { // timeout |
bb4bdbaf | 391 | t_fdm->removeReadFD(sock->getHandle()); |
288f4aa9 | 392 | } |
50c81227 BH |
393 | else if(data.empty()) {// error, EOF or other |
394 | return -1; | |
395 | } | |
396 | ||
9170fbaf | 397 | return ret; |
288f4aa9 BH |
398 | } |
399 | ||
d187038c | 400 | static void handleGenUDPQueryResponse(int fd, FDMultiplexer::funcparam_t& var) |
4465e941 | 401 | { |
fba1e944 | 402 | PacketID pident=*any_cast<PacketID>(&var); |
4465e941 | 403 | char resp[512]; |
7c77ce63 RG |
404 | ComboAddress fromaddr; |
405 | socklen_t addrlen=sizeof(fromaddr); | |
406 | ||
407 | ssize_t ret=recvfrom(fd, resp, sizeof(resp), 0, (sockaddr *)&fromaddr, &addrlen); | |
408 | if (fromaddr != pident.remote) { | |
e6a9dde5 | 409 | g_log<<Logger::Notice<<"Response received from the wrong remote host ("<<fromaddr.toStringWithPort()<<" instead of "<<pident.remote.toStringWithPort()<<"), discarding"<<endl; |
7c77ce63 RG |
410 | |
411 | } | |
412 | ||
4465e941 | 413 | t_fdm->removeReadFD(fd); |
414 | if(ret >= 0) { | |
a683e8bd | 415 | string data(resp, (size_t) ret); |
fba1e944 | 416 | MT->sendEvent(pident, &data); |
4465e941 | 417 | } |
418 | else { | |
fba1e944 | 419 | string empty; |
420 | MT->sendEvent(pident, &empty); | |
421 | // cerr<<"Had some kind of error: "<<ret<<", "<<strerror(errno)<<endl; | |
4465e941 | 422 | } |
423 | } | |
fba1e944 | 424 | string GenUDPQueryResponse(const ComboAddress& dest, const string& query) |
4465e941 | 425 | { |
4465e941 | 426 | Socket s(dest.sin4.sin_family, SOCK_DGRAM); |
427 | s.setNonBlocking(); | |
428 | ComboAddress local = getQueryLocalAddress(dest.sin4.sin_family, 0); | |
429 | ||
430 | s.bind(local); | |
431 | s.connect(dest); | |
4465e941 | 432 | s.send(query); |
433 | ||
434 | PacketID pident; | |
435 | pident.sock=&s; | |
7c77ce63 | 436 | pident.remote=dest; |
4465e941 | 437 | pident.type=0; |
fba1e944 | 438 | t_fdm->addReadFD(s.getHandle(), handleGenUDPQueryResponse, pident); |
4465e941 | 439 | |
440 | string data; | |
fba1e944 | 441 | |
4465e941 | 442 | int ret=MT->waitEvent(pident,&data, g_networkTimeoutMsec); |
fba1e944 | 443 | |
4465e941 | 444 | if(!ret || ret==-1) { // timeout |
4465e941 | 445 | t_fdm->removeReadFD(s.getHandle()); |
446 | } | |
447 | else if(data.empty()) {// error, EOF or other | |
fba1e944 | 448 | // we could special case this |
4465e941 | 449 | return data; |
450 | } | |
4465e941 | 451 | return data; |
452 | } | |
453 | ||
d7dae798 | 454 | //! pick a random query local address |
1652a63e | 455 | ComboAddress getQueryLocalAddress(int family, uint16_t port) |
5a38281c | 456 | { |
1652a63e | 457 | ComboAddress ret; |
5a38281c | 458 | if(family==AF_INET) { |
3ddb9247 | 459 | if(g_localQueryAddresses4.empty()) |
1652a63e | 460 | ret = g_local4; |
3ddb9247 | 461 | else |
1652a63e BH |
462 | ret = g_localQueryAddresses4[dns_random(g_localQueryAddresses4.size())]; |
463 | ret.sin4.sin_port = htons(port); | |
5a38281c BH |
464 | } |
465 | else { | |
466 | if(g_localQueryAddresses6.empty()) | |
1652a63e BH |
467 | ret = g_local6; |
468 | else | |
469 | ret = g_localQueryAddresses6[dns_random(g_localQueryAddresses6.size())]; | |
3ddb9247 | 470 | |
1652a63e | 471 | ret.sin6.sin6_port = htons(port); |
5a38281c | 472 | } |
1652a63e | 473 | return ret; |
5a38281c | 474 | } |
4ef015cd | 475 | |
d187038c | 476 | static void handleUDPServerResponse(int fd, FDMultiplexer::funcparam_t&); |
09e6702a | 477 | |
d187038c | 478 | static void setSocketBuffer(int fd, int optname, uint32_t size) |
d7dae798 BH |
479 | { |
480 | uint32_t psize=0; | |
481 | socklen_t len=sizeof(psize); | |
3ddb9247 | 482 | |
d7dae798 | 483 | if(!getsockopt(fd, SOL_SOCKET, optname, (char*)&psize, &len) && psize > size) { |
e6a9dde5 | 484 | g_log<<Logger::Error<<"Not decreasing socket buffer size from "<<psize<<" to "<<size<<endl; |
3ddb9247 | 485 | return; |
d7dae798 BH |
486 | } |
487 | ||
488 | if (setsockopt(fd, SOL_SOCKET, optname, (char*)&size, sizeof(size)) < 0 ) | |
e6a9dde5 | 489 | g_log<<Logger::Error<<"Unable to raise socket buffer size to "<<size<<": "<<strerror(errno)<<endl; |
d7dae798 BH |
490 | } |
491 | ||
492 | ||
493 | static void setSocketReceiveBuffer(int fd, uint32_t size) | |
494 | { | |
495 | setSocketBuffer(fd, SO_RCVBUF, size); | |
496 | } | |
497 | ||
498 | static void setSocketSendBuffer(int fd, uint32_t size) | |
499 | { | |
500 | setSocketBuffer(fd, SO_SNDBUF, size); | |
501 | } | |
502 | ||
503 | ||
4ef015cd BH |
504 | // you can ask this class for a UDP socket to send a query from |
505 | // this socket is not yours, don't even think about deleting it | |
506 | // but after you call 'returnSocket' on it, don't assume anything anymore | |
507 | class UDPClientSocks | |
508 | { | |
4ef015cd | 509 | unsigned int d_numsocks; |
4ef015cd | 510 | public: |
e2642526 | 511 | UDPClientSocks() : d_numsocks(0) |
4ef015cd BH |
512 | { |
513 | } | |
514 | ||
996c89cc | 515 | typedef set<int> socks_t; |
4ef015cd BH |
516 | socks_t d_socks; |
517 | ||
2ee280cf | 518 | // returning -2 means: temporary OS error (ie, out of files), -1 means error related to remote |
d8f6d49f | 519 | int getSocket(const ComboAddress& toaddr, int* fd) |
4ef015cd | 520 | { |
d8f6d49f BH |
521 | *fd=makeClientSocket(toaddr.sin4.sin_family); |
522 | if(*fd < 0) // temporary error - receive exception otherwise | |
2ee280cf | 523 | return -2; |
d8f6d49f BH |
524 | |
525 | if(connect(*fd, (struct sockaddr*)(&toaddr), toaddr.getSocklen()) < 0) { | |
526 | int err = errno; | |
41ff43f8 | 527 | // returnSocket(*fd); |
a7b68ae7 RG |
528 | try { |
529 | closesocket(*fd); | |
530 | } | |
531 | catch(const PDNSException& e) { | |
e6a9dde5 | 532 | g_log<<Logger::Error<<"Error closing UDP socket after connect() failed: "<<e.reason<<endl; |
a7b68ae7 RG |
533 | } |
534 | ||
d8f6d49f | 535 | if(err==ENETUNREACH) // Seth "My Interfaces Are Like A Yo Yo" Arnold special |
4957a608 | 536 | return -2; |
998a4334 | 537 | return -1; |
d8f6d49f | 538 | } |
998a4334 | 539 | |
d8f6d49f | 540 | d_socks.insert(*fd); |
998a4334 | 541 | d_numsocks++; |
d8f6d49f | 542 | return 0; |
4ef015cd BH |
543 | } |
544 | ||
095c3045 BH |
545 | void returnSocket(int fd) |
546 | { | |
547 | socks_t::iterator i=d_socks.find(fd); | |
34801ab1 | 548 | if(i==d_socks.end()) { |
335da0ba | 549 | throw PDNSException("Trying to return a socket (fd="+std::to_string(fd)+") not in the pool"); |
34801ab1 | 550 | } |
bb4bdbaf | 551 | returnSocketLocked(i); |
095c3045 BH |
552 | } |
553 | ||
4ef015cd | 554 | // return a socket to the pool, or simply erase it |
bb4bdbaf | 555 | void returnSocketLocked(socks_t::iterator& i) |
4ef015cd | 556 | { |
600fc20b | 557 | if(i==d_socks.end()) { |
3f81d239 | 558 | throw PDNSException("Trying to return a socket not in the pool"); |
600fc20b | 559 | } |
80baf329 | 560 | try { |
bb4bdbaf | 561 | t_fdm->removeReadFD(*i); |
80baf329 BH |
562 | } |
563 | catch(FDMultiplexerException& e) { | |
bb4bdbaf | 564 | // we sometimes return a socket that has not yet been assigned to t_fdm |
80baf329 | 565 | } |
a7b68ae7 RG |
566 | try { |
567 | closesocket(*i); | |
568 | } | |
569 | catch(const PDNSException& e) { | |
e6a9dde5 | 570 | g_log<<Logger::Error<<"Error closing returned UDP socket: "<<e.reason<<endl; |
a7b68ae7 | 571 | } |
3ddb9247 | 572 | |
998a4334 BH |
573 | d_socks.erase(i++); |
574 | --d_numsocks; | |
4ef015cd | 575 | } |
d8f6d49f BH |
576 | |
577 | // returns -1 for errors which might go away, throws for ones that won't | |
bb4bdbaf | 578 | static int makeClientSocket(int family) |
d8f6d49f | 579 | { |
a683e8bd | 580 | int ret=socket(family, SOCK_DGRAM, 0 ); // turns out that setting CLO_EXEC and NONBLOCK from here is not a performance win on Linux (oddly enough) |
42c235e5 | 581 | |
d8f6d49f BH |
582 | if(ret < 0 && errno==EMFILE) // this is not a catastrophic error |
583 | return ret; | |
3ddb9247 PD |
584 | |
585 | if(ret<0) | |
335da0ba | 586 | throw PDNSException("Making a socket for resolver (family = "+std::to_string(family)+"): "+stringerror()); |
36855b53 | 587 | |
7eb73ffa | 588 | // setCloseOnExec(ret); // we're not going to exec |
5a38281c | 589 | |
d8f6d49f | 590 | int tries=10; |
3aa91c3e | 591 | ComboAddress sin; |
d8f6d49f | 592 | while(--tries) { |
1652a63e | 593 | uint16_t port; |
3ddb9247 | 594 | |
d8f6d49f | 595 | if(tries==1) // fall back to kernel 'random' |
4957a608 | 596 | port = 0; |
bf6f28ca CHB |
597 | else { |
598 | do { | |
599 | port = s_minUdpSourcePort + dns_random(s_maxUdpSourcePort - s_minUdpSourcePort + 1); | |
600 | } | |
601 | while (s_avoidUdpSourcePorts.count(port)); | |
602 | } | |
5a38281c | 603 | |
3aa91c3e | 604 | sin=getQueryLocalAddress(family, port); // does htons for us |
5a38281c | 605 | |
3ddb9247 | 606 | if (::bind(ret, (struct sockaddr *)&sin, sin.getSocklen()) >= 0) |
4957a608 | 607 | break; |
d8f6d49f BH |
608 | } |
609 | if(!tries) | |
3aa91c3e | 610 | throw PDNSException("Resolver binding to local query client socket on "+sin.toString()+": "+stringerror()); |
3ddb9247 | 611 | |
3897b9e1 | 612 | setNonBlocking(ret); |
d8f6d49f BH |
613 | return ret; |
614 | } | |
49a699c4 BH |
615 | }; |
616 | ||
f26bf547 | 617 | static thread_local std::unique_ptr<UDPClientSocks> t_udpclientsocks; |
4ef015cd | 618 | |
288f4aa9 | 619 | /* these two functions are used by LWRes */ |
34801ab1 | 620 | // -2 is OS error, -1 is error that depends on the remote, > 0 is success |
a683e8bd | 621 | int asendto(const char *data, size_t len, int flags, |
3ddb9247 | 622 | const ComboAddress& toaddr, uint16_t id, const DNSName& domain, uint16_t qtype, int* fd) |
288f4aa9 | 623 | { |
34801ab1 BH |
624 | |
625 | PacketID pident; | |
787e5eab BH |
626 | pident.domain = domain; |
627 | pident.remote = toaddr; | |
628 | pident.type = qtype; | |
34801ab1 BH |
629 | |
630 | // see if there is an existing outstanding request we can chain on to, using partial equivalence function | |
631 | pair<MT_t::waiters_t::iterator, MT_t::waiters_t::iterator> chain=MT->d_waiters.equal_range(pident, PacketIDBirthdayCompare()); | |
632 | ||
633 | for(; chain.first != chain.second; chain.first++) { | |
634 | if(chain.first->key.fd > -1) { // don't chain onto existing chained waiter! | |
e27e91a8 | 635 | /* |
4665c31e BH |
636 | cerr<<"Orig: "<<pident.domain<<", "<<pident.remote.toString()<<", id="<<id<<endl; |
637 | cerr<<"Had hit: "<< chain.first->key.domain<<", "<<chain.first->key.remote.toString()<<", id="<<chain.first->key.id | |
4957a608 | 638 | <<", count="<<chain.first->key.chain.size()<<", origfd: "<<chain.first->key.fd<<endl; |
e27e91a8 | 639 | */ |
34801ab1 BH |
640 | chain.first->key.chain.insert(id); // we can chain |
641 | *fd=-1; // gets used in waitEvent / sendEvent later on | |
642 | return 1; | |
643 | } | |
644 | } | |
645 | ||
49a699c4 | 646 | int ret=t_udpclientsocks->getSocket(toaddr, fd); |
d8f6d49f BH |
647 | if(ret < 0) |
648 | return ret; | |
34801ab1 | 649 | |
998a4334 BH |
650 | pident.fd=*fd; |
651 | pident.id=id; | |
3ddb9247 | 652 | |
bb4bdbaf BH |
653 | t_fdm->addReadFD(*fd, handleUDPServerResponse, pident); |
654 | ret = send(*fd, data, len, 0); | |
655 | ||
5b0ddd18 | 656 | int tmp = errno; |
bb4bdbaf | 657 | |
7302ed0a | 658 | if(ret < 0) |
49a699c4 | 659 | t_udpclientsocks->returnSocket(*fd); |
bb4bdbaf | 660 | |
5b0ddd18 | 661 | errno = tmp; // this is for logging purposes only |
7302ed0a | 662 | return ret; |
288f4aa9 BH |
663 | } |
664 | ||
9170fbaf | 665 | // -1 is error, 0 is timeout, 1 is success |
f128d20d | 666 | int arecvfrom(std::string& packet, int flags, const ComboAddress& fromaddr, size_t *d_len, |
c5c066bf | 667 | uint16_t id, const DNSName& domain, uint16_t qtype, int fd, struct timeval* now) |
288f4aa9 | 668 | { |
0d5f0a9f | 669 | static optional<unsigned int> nearMissLimit; |
3ddb9247 | 670 | if(!nearMissLimit) |
0d5f0a9f BH |
671 | nearMissLimit=::arg().asNum("spoof-nearmiss-max"); |
672 | ||
288f4aa9 | 673 | PacketID pident; |
4ef015cd | 674 | pident.fd=fd; |
288f4aa9 | 675 | pident.id=id; |
0d5f0a9f | 676 | pident.domain=domain; |
787e5eab | 677 | pident.type = qtype; |
996c89cc | 678 | pident.remote=fromaddr; |
b636533b | 679 | |
5b0ddd18 | 680 | int ret=MT->waitEvent(pident, &packet, g_networkTimeoutMsec, now); |
34801ab1 | 681 | |
9170fbaf | 682 | if(ret > 0) { |
996c89cc | 683 | if(packet.empty()) // means "error" |
3ddb9247 | 684 | return -1; |
998a4334 | 685 | |
a683e8bd | 686 | *d_len=packet.size(); |
f128d20d | 687 | |
0d5f0a9f | 688 | if(*nearMissLimit && pident.nearMisses > *nearMissLimit) { |
e6a9dde5 | 689 | g_log<<Logger::Error<<"Too many ("<<pident.nearMisses<<" > "<<*nearMissLimit<<") bogus answers for '"<<domain<<"' from "<<fromaddr.toString()<<", assuming spoof attempt."<<endl; |
0d5f0a9f | 690 | g_stats.spoofCount++; |
35ce8576 BH |
691 | return -1; |
692 | } | |
288f4aa9 | 693 | } |
09e6702a | 694 | else { |
34801ab1 | 695 | if(fd >= 0) |
49a699c4 | 696 | t_udpclientsocks->returnSocket(fd); |
09e6702a | 697 | } |
9170fbaf | 698 | return ret; |
288f4aa9 BH |
699 | } |
700 | ||
88def049 BH |
701 | static void writePid(void) |
702 | { | |
191f2e47 | 703 | if(!::arg().mustDo("write-pid")) |
704 | return; | |
18e7758c | 705 | ofstream of(s_pidfname.c_str(), std::ios_base::app); |
88def049 | 706 | if(of) |
705f31ae | 707 | of<< Utility::getpid() <<endl; |
88def049 | 708 | else |
e6a9dde5 | 709 | g_log<<Logger::Error<<"Writing pid for "<<Utility::getpid()<<" to "<<s_pidfname<<" failed: "<<strerror(errno)<<endl; |
88def049 BH |
710 | } |
711 | ||
2749c3fe | 712 | TCPConnection::TCPConnection(int fd, const ComboAddress& addr) : data(2, 0), d_remote(addr), d_fd(fd) |
3ddb9247 PD |
713 | { |
714 | ++s_currentConnections; | |
cd989c87 | 715 | (*t_tcpClientCounts)[d_remote]++; |
0e408828 | 716 | } |
cd989c87 BH |
717 | |
718 | TCPConnection::~TCPConnection() | |
0e408828 | 719 | { |
a7b68ae7 RG |
720 | try { |
721 | if(closesocket(d_fd) < 0) | |
e6a9dde5 | 722 | g_log<<Logger::Error<<"Error closing socket for TCPConnection"<<endl; |
a7b68ae7 RG |
723 | } |
724 | catch(const PDNSException& e) { | |
e6a9dde5 | 725 | g_log<<Logger::Error<<"Error closing TCPConnection socket: "<<e.reason<<endl; |
a7b68ae7 RG |
726 | } |
727 | ||
3ddb9247 | 728 | if(t_tcpClientCounts->count(d_remote) && !(*t_tcpClientCounts)[d_remote]--) |
cd989c87 | 729 | t_tcpClientCounts->erase(d_remote); |
1bc9e6bd | 730 | --s_currentConnections; |
0e408828 | 731 | } |
0e9d9ce2 | 732 | |
3ddb9247 | 733 | AtomicCounter TCPConnection::s_currentConnections; |
d187038c RG |
734 | |
735 | static void handleRunningTCPQuestion(int fd, FDMultiplexer::funcparam_t& var); | |
6dcd28c3 | 736 | |
92011b8f | 737 | // the idea is, only do things that depend on the *response* here. Incoming accounting is on incoming. |
d187038c | 738 | static void updateResponseStats(int res, const ComboAddress& remote, unsigned int packetsize, const DNSName* query, uint16_t qtype) |
2cc13433 | 739 | { |
92011b8f | 740 | if(packetsize > 1000 && t_largeanswerremotes) |
741 | t_largeanswerremotes->push_back(remote); | |
2cc13433 BH |
742 | switch(res) { |
743 | case RCode::ServFail: | |
92011b8f | 744 | if(t_servfailremotes) { |
745 | t_servfailremotes->push_back(remote); | |
5af86fdc | 746 | if(query && t_servfailqueryring) // packet cache |
92011b8f | 747 | t_servfailqueryring->push_back(make_pair(*query, qtype)); |
748 | } | |
2cc13433 BH |
749 | g_stats.servFails++; |
750 | break; | |
751 | case RCode::NXDomain: | |
752 | g_stats.nxDomains++; | |
753 | break; | |
754 | case RCode::NoError: | |
755 | g_stats.noErrors++; | |
756 | break; | |
757 | } | |
758 | } | |
759 | ||
5164bac3 | 760 | static string makeLoginfo(const DNSComboWriter* dc) |
a903b39c | 761 | try |
762 | { | |
5cc8371b | 763 | return "("+dc->d_mdp.d_qname.toLogString()+"/"+DNSRecordContent::NumberToType(dc->d_mdp.d_qtype)+" from "+(dc->getRemote())+")"; |
a903b39c | 764 | } |
765 | catch(...) | |
766 | { | |
767 | return "Exception making error message for exception"; | |
768 | } | |
769 | ||
aa7929a3 | 770 | #ifdef HAVE_PROTOBUF |
590388d2 | 771 | static void protobufLogQuery(const std::shared_ptr<RemoteLogger>& logger, uint8_t maskV4, uint8_t maskV6, const boost::uuids::uuid& uniqueId, const ComboAddress& remote, const ComboAddress& local, const Netmask& ednssubnet, bool tcp, uint16_t id, size_t len, const DNSName& qname, uint16_t qtype, uint16_t qclass, const std::vector<std::string>& policyTags, const std::string& requestorId, const std::string& deviceId) |
aa7929a3 | 772 | { |
e1c8a4bb RG |
773 | Netmask requestorNM(remote, remote.sin4.sin_family == AF_INET ? maskV4 : maskV6); |
774 | const ComboAddress& requestor = requestorNM.getMaskedNetwork(); | |
775 | RecProtoBufMessage message(DNSProtoBufMessage::Query, uniqueId, &requestor, &local, qname, qtype, qclass, id, tcp, len); | |
a94bc5d7 | 776 | message.setEDNSSubnet(ednssubnet, ednssubnet.isIpv4() ? maskV4 : maskV6); |
67e31ebe | 777 | message.setRequestorId(requestorId); |
590388d2 | 778 | message.setDeviceId(deviceId); |
02b47f43 | 779 | |
02b47f43 | 780 | if (!policyTags.empty()) { |
d9d3f9c1 | 781 | message.setPolicyTags(policyTags); |
02b47f43 | 782 | } |
aa7929a3 | 783 | |
d9d3f9c1 | 784 | // cerr <<message.toDebugString()<<endl; |
aa7929a3 | 785 | std::string str; |
d9d3f9c1 | 786 | message.serialize(str); |
aa7929a3 | 787 | logger->queueData(str); |
aa7929a3 RG |
788 | } |
789 | ||
d9d3f9c1 | 790 | static void protobufLogResponse(const std::shared_ptr<RemoteLogger>& logger, const RecProtoBufMessage& message) |
aa7929a3 | 791 | { |
d9d3f9c1 | 792 | // cerr <<message.toDebugString()<<endl; |
aa7929a3 | 793 | std::string str; |
d9d3f9c1 | 794 | message.serialize(str); |
aa7929a3 | 795 | logger->queueData(str); |
aa7929a3 RG |
796 | } |
797 | #endif | |
798 | ||
53508135 PL |
799 | /** |
800 | * Chases the CNAME provided by the PolicyCustom RPZ policy. | |
801 | * | |
802 | * @param spoofed: The DNSRecord that was created by the policy, should already be added to ret | |
803 | * @param qtype: The QType of the original query | |
804 | * @param sr: A SyncRes | |
805 | * @param res: An integer that will contain the RCODE of the lookup we do | |
806 | * @param ret: A vector of DNSRecords where the result of the CNAME chase should be appended to | |
807 | */ | |
d187038c | 808 | static void handleRPZCustom(const DNSRecord& spoofed, const QType& qtype, SyncRes& sr, int& res, vector<DNSRecord>& ret) |
53508135 PL |
809 | { |
810 | if (spoofed.d_type == QType::CNAME) { | |
30ee601a RG |
811 | bool oldWantsRPZ = sr.getWantsRPZ(); |
812 | sr.setWantsRPZ(false); | |
53508135 PL |
813 | vector<DNSRecord> ans; |
814 | res = sr.beginResolve(DNSName(spoofed.d_content->getZoneRepresentation()), qtype, 1, ans); | |
815 | for (const auto& rec : ans) { | |
816 | if(rec.d_place == DNSResourceRecord::ANSWER) { | |
817 | ret.push_back(rec); | |
818 | } | |
819 | } | |
820 | // Reset the RPZ state of the SyncRes | |
30ee601a | 821 | sr.setWantsRPZ(oldWantsRPZ); |
53508135 PL |
822 | } |
823 | } | |
824 | ||
70fb28d9 | 825 | static bool addRecordToPacket(DNSPacketWriter& pw, const DNSRecord& rec, uint32_t& minTTL, uint32_t ttlCap, const uint16_t maxAnswerSize) |
97c6d7e5 | 826 | { |
70fb28d9 | 827 | pw.startRecord(rec.d_name, rec.d_type, (rec.d_ttl > ttlCap ? ttlCap : rec.d_ttl), rec.d_class, rec.d_place); |
97c6d7e5 RG |
828 | |
829 | if(rec.d_type != QType::OPT) // their TTL ain't real | |
830 | minTTL = min(minTTL, rec.d_ttl); | |
831 | ||
832 | rec.d_content->toPacket(pw); | |
833 | if(pw.size() > static_cast<size_t>(maxAnswerSize)) { | |
834 | pw.rollback(); | |
835 | if(rec.d_place != DNSResourceRecord::ADDITIONAL) { | |
836 | pw.getHeader()->tc=1; | |
837 | pw.truncate(); | |
838 | } | |
839 | return false; | |
840 | } | |
841 | ||
842 | return true; | |
843 | } | |
844 | ||
63341e8d RG |
845 | #ifdef HAVE_PROTOBUF |
846 | static std::shared_ptr<RemoteLogger> startProtobufServer(const ProtobufExportConfig& config, uint64_t generation) | |
847 | { | |
848 | std::shared_ptr<RemoteLogger> result = nullptr; | |
849 | try { | |
850 | result = std::make_shared<RemoteLogger>(config.server, config.timeout, config.maxQueuedEntries, config.reconnectWaitTime, config.asyncConnect); | |
851 | result->setGeneration(generation); | |
852 | } | |
853 | catch(const std::exception& e) { | |
854 | g_log<<Logger::Error<<"Error while starting protobuf logger to '"<<config.server<<": "<<e.what()<<endl; | |
855 | } | |
856 | catch(const PDNSException& e) { | |
857 | g_log<<Logger::Error<<"Error while starting protobuf logger to '"<<config.server<<": "<<e.reason<<endl; | |
858 | } | |
859 | ||
860 | return result; | |
861 | } | |
862 | ||
863 | static bool checkProtobufExport(LocalStateHolder<LuaConfigItems>& luaconfsLocal) | |
864 | { | |
865 | if (!luaconfsLocal->protobufExportConfig.enabled) { | |
866 | if (t_protobufServer != nullptr) { | |
867 | t_protobufServer->stop(); | |
868 | t_protobufServer = nullptr; | |
869 | } | |
870 | ||
871 | return false; | |
872 | } | |
873 | ||
874 | /* if the server was not running, or if it was running according to a | |
875 | previous configuration */ | |
876 | if (t_protobufServer == nullptr || | |
877 | t_protobufServer->getGeneration() < luaconfsLocal->generation) { | |
878 | ||
879 | if (t_protobufServer) { | |
880 | t_protobufServer->stop(); | |
881 | } | |
882 | ||
883 | t_protobufServer = startProtobufServer(luaconfsLocal->protobufExportConfig, luaconfsLocal->generation); | |
884 | } | |
885 | ||
886 | return true; | |
887 | } | |
888 | ||
889 | static bool checkOutgoingProtobufExport(LocalStateHolder<LuaConfigItems>& luaconfsLocal) | |
890 | { | |
891 | if (!luaconfsLocal->outgoingProtobufExportConfig.enabled) { | |
892 | if (t_outgoingProtobufServer != nullptr) { | |
893 | t_outgoingProtobufServer->stop(); | |
894 | t_outgoingProtobufServer = nullptr; | |
895 | } | |
896 | ||
897 | return false; | |
898 | } | |
899 | ||
900 | /* if the server was not running, or if it was running according to a | |
901 | previous configuration */ | |
902 | if (t_outgoingProtobufServer == nullptr || | |
903 | t_outgoingProtobufServer->getGeneration() < luaconfsLocal->generation) { | |
904 | ||
905 | if (t_outgoingProtobufServer) { | |
906 | t_outgoingProtobufServer->stop(); | |
907 | } | |
908 | ||
909 | t_outgoingProtobufServer = startProtobufServer(luaconfsLocal->outgoingProtobufExportConfig, luaconfsLocal->generation); | |
910 | } | |
911 | ||
912 | return true; | |
913 | } | |
914 | #endif /* HAVE_PROTOBUF */ | |
915 | ||
af1377b7 NC |
916 | #ifdef NOD_ENABLED |
917 | static void nodCheckNewDomain(const DNSName& dname) | |
918 | { | |
919 | static const QType qt(QType::A); | |
920 | static const uint16_t qc(QClass::IN); | |
921 | // First check the (sub)domain isn't whitelisted for NOD purposes | |
922 | if (!g_nodDomainWL.check(dname)) { | |
923 | // Now check the NODDB (note this is probablistic so can have FNs/FPs) | |
924 | if (t_nodDBp && t_nodDBp->isNewDomain(dname)) { | |
925 | if (g_nodLog) { | |
926 | // This should probably log to a dedicated log file | |
927 | g_log<<Logger::Notice<<"Newly observed domain nod="<<dname.toLogString()<<endl; | |
928 | } | |
929 | if (!(g_nodLookupDomain.isRoot())) { | |
930 | // Send a DNS A query to <domain>.g_nodLookupDomain | |
931 | DNSName qname = dname; | |
932 | vector<DNSRecord> dummy; | |
933 | qname += g_nodLookupDomain; | |
934 | directResolve(qname, qt, qc, dummy); | |
935 | } | |
936 | } | |
937 | } | |
938 | } | |
939 | ||
940 | static void nodAddDomain(const DNSName& dname) | |
941 | { | |
942 | // Don't bother adding domains on the nod whitelist | |
943 | if (!g_nodDomainWL.check(dname)) { | |
944 | if (t_nodDBp) { | |
945 | // This keeps the nod info up to date | |
946 | t_nodDBp->addDomain(dname); | |
947 | } | |
948 | } | |
949 | } | |
950 | #endif /* NOD_ENABLED */ | |
951 | ||
d187038c | 952 | static void startDoResolve(void *p) |
288f4aa9 | 953 | { |
7b1469bb | 954 | DNSComboWriter* dc=(DNSComboWriter *)p; |
288f4aa9 | 955 | try { |
5af86fdc RG |
956 | if (t_queryring) |
957 | t_queryring->push_back(make_pair(dc->d_mdp.d_qname, dc->d_mdp.d_qtype)); | |
92011b8f | 958 | |
32015748 | 959 | uint16_t maxanswersize = dc->d_tcp ? 65535 : min(static_cast<uint16_t>(512), g_udpTruncationThreshold); |
7f7b8d55 | 960 | EDNSOpts edo; |
5164bac3 | 961 | std::vector<pair<uint16_t, string> > ednsOpts; |
eb9444be | 962 | bool variableAnswer = dc->d_variable; |
8e079f3a | 963 | bool haveEDNS=false; |
f1db0de2 PL |
964 | DNSPacketWriter::optvect_t returnedEdnsOptions; // Here we stuff all the options for the return packet |
965 | uint8_t ednsExtRCode = 0; | |
8e079f3a | 966 | if(getEDNSOpts(dc->d_mdp, &edo)) { |
f1db0de2 PL |
967 | haveEDNS=true; |
968 | if (edo.d_version != 0) { | |
969 | ednsExtRCode = ERCode::BADVERS; | |
970 | } | |
971 | ||
32015748 RG |
972 | if(!dc->d_tcp) { |
973 | /* rfc6891 6.2.3: | |
974 | "Values lower than 512 MUST be treated as equal to 512." | |
975 | */ | |
976 | maxanswersize = min(static_cast<uint16_t>(edo.d_packetsize >= 512 ? edo.d_packetsize : 512), g_udpTruncationThreshold); | |
977 | } | |
5164bac3 | 978 | ednsOpts = edo.d_options; |
8e079f3a | 979 | haveEDNS=true; |
3af35968 | 980 | maxanswersize -= 11; // EDNS header size |
b40562da | 981 | |
1f691b94 PL |
982 | for (const auto& o : edo.d_options) { |
983 | if (o.first == EDNSOptionCode::ECS && g_useIncomingECS && !dc->d_ecsParsed) { | |
984 | dc->d_ecsFound = getEDNSSubnetOptsFromString(o.second, &dc->d_ednssubnet); | |
985 | } else if (o.first == EDNSOptionCode::NSID) { | |
f1db0de2 | 986 | const static string mode_server_id = ::arg()["server-id"]; |
8a42919a PL |
987 | if(mode_server_id != "disabled" && !mode_server_id.empty() && |
988 | maxanswersize > (2 + 2 + mode_server_id.size())) { | |
f1db0de2 PL |
989 | returnedEdnsOptions.push_back(make_pair(EDNSOptionCode::NSID, mode_server_id)); |
990 | variableAnswer = true; // Can't packetcache an answer with NSID | |
991 | // Option Code and Option Length are both 2 | |
992 | maxanswersize -= 2 + 2 + mode_server_id.size(); | |
993 | } | |
b40562da RG |
994 | } |
995 | } | |
10321a98 | 996 | } |
b40562da RG |
997 | /* perhaps there was no EDNS or no ECS but by now we looked */ |
998 | dc->d_ecsParsed = true; | |
e325f20c | 999 | vector<DNSRecord> ret; |
ea634573 | 1000 | vector<uint8_t> packet; |
b23b8614 | 1001 | |
ad42489c | 1002 | auto luaconfsLocal = g_luaconfs.getLocal(); |
b8470add PL |
1003 | // Used to tell syncres later on if we should apply NSDNAME and NSIP RPZ triggers for this query |
1004 | bool wantsRPZ(true); | |
1fbc6dc5 | 1005 | boost::optional<RecProtoBufMessage> pbMessage(boost::none); |
f1c7929a | 1006 | bool logResponse = false; |
aa7929a3 | 1007 | #ifdef HAVE_PROTOBUF |
63341e8d | 1008 | if (checkProtobufExport(luaconfsLocal)) { |
f1c7929a | 1009 | logResponse = t_protobufServer && luaconfsLocal->protobufExportConfig.logResponses; |
5cc8371b | 1010 | Netmask requestorNM(dc->d_source, dc->d_source.sin4.sin_family == AF_INET ? luaconfsLocal->protobufMaskV4 : luaconfsLocal->protobufMaskV6); |
e1c8a4bb | 1011 | const ComboAddress& requestor = requestorNM.getMaskedNetwork(); |
d362f7c1 RG |
1012 | pbMessage = RecProtoBufMessage(RecProtoBufMessage::Response); |
1013 | pbMessage->update(dc->d_uuid, &requestor, &dc->d_destination, dc->d_tcp, dc->d_mdp.d_header.id); | |
1014 | pbMessage->setEDNSSubnet(dc->d_ednssubnet.source, dc->d_ednssubnet.source.isIpv4() ? luaconfsLocal->protobufMaskV4 : luaconfsLocal->protobufMaskV6); | |
1015 | pbMessage->setQuestion(dc->d_mdp.d_qname, dc->d_mdp.d_qtype, dc->d_mdp.d_qclass); | |
d9d3f9c1 RG |
1016 | } |
1017 | #endif /* HAVE_PROTOBUF */ | |
ad42489c | 1018 | |
3ddb9247 | 1019 | DNSPacketWriter pw(packet, dc->d_mdp.d_qname, dc->d_mdp.d_qtype, dc->d_mdp.d_qclass); |
ea634573 BH |
1020 | |
1021 | pw.getHeader()->aa=0; | |
1022 | pw.getHeader()->ra=1; | |
c154c8a4 | 1023 | pw.getHeader()->qr=1; |
bb4bdbaf | 1024 | pw.getHeader()->tc=0; |
ea634573 | 1025 | pw.getHeader()->id=dc->d_mdp.d_header.id; |
10321a98 | 1026 | pw.getHeader()->rd=dc->d_mdp.d_header.rd; |
57769f13 | 1027 | pw.getHeader()->cd=dc->d_mdp.d_header.cd; |
ea634573 | 1028 | |
70fb28d9 RG |
1029 | /* This is the lowest TTL seen in the records of the response, |
1030 | so we can't cache it for longer than this value. | |
1031 | If we have a TTL cap, this value can't be larger than the | |
1032 | cap no matter what. */ | |
1033 | uint32_t minTTL = dc->d_ttlCap; | |
904d3219 PD |
1034 | |
1035 | SyncRes sr(dc->d_now); | |
0c43f455 | 1036 | |
2e921ec6 | 1037 | bool DNSSECOK=false; |
3457a2a0 | 1038 | if(t_pdl) { |
f26bf547 | 1039 | sr.setLuaEngine(t_pdl); |
3457a2a0 | 1040 | } |
9eec8c98 | 1041 | if(g_dnssecmode != DNSSECMode::Off) { |
30ee601a | 1042 | sr.setDoDNSSEC(true); |
9eec8c98 PL |
1043 | |
1044 | // Does the requestor want DNSSEC records? | |
d6c335ab | 1045 | if(edo.d_extFlags & EDNSOpts::DNSSECOK) { |
9eec8c98 PL |
1046 | DNSSECOK=true; |
1047 | g_stats.dnssecQueries++; | |
1048 | } | |
1049 | } else { | |
1050 | // Ignore the client-set CD flag | |
1051 | pw.getHeader()->cd=0; | |
5b9853c9 | 1052 | } |
0c43f455 RG |
1053 | sr.setDNSSECValidationRequested(g_dnssecmode == DNSSECMode::ValidateAll || g_dnssecmode==DNSSECMode::ValidateForLog || ((dc->d_mdp.d_header.ad || DNSSECOK) && g_dnssecmode==DNSSECMode::Process)); |
1054 | ||
4898a348 | 1055 | #ifdef HAVE_PROTOBUF |
30ee601a | 1056 | sr.setInitialRequestId(dc->d_uuid); |
63341e8d | 1057 | sr.setOutgoingProtobufServer(t_outgoingProtobufServer); |
4898a348 | 1058 | #endif |
0c43f455 | 1059 | |
2fe3354d | 1060 | sr.setQuerySource(dc->d_remote, g_useIncomingECS && !dc->d_ednssubnet.source.empty() ? boost::optional<const EDNSSubnetOpts&>(dc->d_ednssubnet) : boost::none); |
57769f13 | 1061 | |
904d3219 | 1062 | bool tracedQuery=false; // we could consider letting Lua know about this too |
9fc36e90 | 1063 | bool shouldNotValidate = false; |
904d3219 | 1064 | |
ef3b6cd7 RG |
1065 | /* preresolve expects res (dq.rcode) to be set to RCode::NoError by default */ |
1066 | int res = RCode::NoError; | |
1f1ca368 | 1067 | DNSFilterEngine::Policy appliedPolicy; |
39ec5d29 | 1068 | DNSRecord spoofed; |
f1c7929a | 1069 | RecursorLua4::DNSQuestion dq(dc->d_source, dc->d_destination, dc->d_mdp.d_qname, dc->d_mdp.d_qtype, dc->d_tcp, variableAnswer, wantsRPZ, logResponse); |
d6c335ab | 1070 | dq.ednsFlags = &edo.d_extFlags; |
5164bac3 | 1071 | dq.ednsOptions = &ednsOpts; |
6e505c5e RG |
1072 | dq.tag = dc->d_tag; |
1073 | dq.discardedPolicies = &sr.d_discardedPolicies; | |
1074 | dq.policyTags = &dc->d_policyTags; | |
1075 | dq.appliedPolicy = &appliedPolicy; | |
1076 | dq.currentRecords = &ret; | |
1077 | dq.dh = &dc->d_mdp.d_header; | |
05c74122 | 1078 | dq.data = dc->d_data; |
67e31ebe RG |
1079 | #ifdef HAVE_PROTOBUF |
1080 | dq.requestorId = dc->d_requestorId; | |
590388d2 | 1081 | dq.deviceId = dc->d_deviceId; |
67e31ebe | 1082 | #endif |
ba21fcfe | 1083 | |
6cf96227 PL |
1084 | if(ednsExtRCode != 0) { |
1085 | goto sendit; | |
1086 | } | |
1087 | ||
e661a20b | 1088 | if(dc->d_mdp.d_qtype==QType::ANY && !dc->d_tcp && g_anyToTcp) { |
56b4d21b PD |
1089 | pw.getHeader()->tc = 1; |
1090 | res = 0; | |
1091 | variableAnswer = true; | |
e661a20b PD |
1092 | goto sendit; |
1093 | } | |
1094 | ||
f26bf547 | 1095 | if(t_traceRegex && t_traceRegex->match(dc->d_mdp.d_qname.toString())) { |
77499b05 BH |
1096 | sr.setLogMode(SyncRes::Store); |
1097 | tracedQuery=true; | |
1098 | } | |
3ddb9247 | 1099 | |
8f7473d7 | 1100 | |
976ec823 | 1101 | if(!g_quiet || tracedQuery) { |
e6a9dde5 | 1102 | g_log<<Logger::Warning<<t_id<<" ["<<MT->getTid()<<"/"<<MT->numProcesses()<<"] " << (dc->d_tcp ? "TCP " : "") << "question for '"<<dc->d_mdp.d_qname<<"|" |
976ec823 | 1103 | <<DNSRecordContent::NumberToType(dc->d_mdp.d_qtype)<<"' from "<<dc->getRemote(); |
b40562da | 1104 | if(!dc->d_ednssubnet.source.empty()) { |
e6a9dde5 | 1105 | g_log<<" (ecs "<<dc->d_ednssubnet.source.toString()<<")"; |
6e986f5e | 1106 | } |
e6a9dde5 | 1107 | g_log<<endl; |
976ec823 | 1108 | } |
c75a6a9e | 1109 | |
fededf47 | 1110 | sr.setId(MT->getTid()); |
67828389 | 1111 | if(!dc->d_mdp.d_header.rd) |
c836dc19 BH |
1112 | sr.setCacheOnly(); |
1113 | ||
f26bf547 RG |
1114 | if (t_pdl) { |
1115 | t_pdl->prerpz(dq, res); | |
0a273054 RG |
1116 | } |
1117 | ||
db486de5 | 1118 | // Check if the query has a policy attached to it |
0a273054 | 1119 | if (wantsRPZ) { |
5cc8371b | 1120 | appliedPolicy = luaconfsLocal->dfe.getQueryPolicy(dc->d_mdp.d_qname, dc->d_source, sr.d_discardedPolicies); |
0a273054 | 1121 | } |
644dd1da | 1122 | |
54be222b | 1123 | // if there is a RecursorLua active, and it 'took' the query in preResolve, we don't launch beginResolve |
f26bf547 | 1124 | if(!t_pdl || !t_pdl->preresolve(dq, res)) { |
b8470add | 1125 | |
30ee601a | 1126 | sr.setWantsRPZ(wantsRPZ); |
b8470add PL |
1127 | if(wantsRPZ) { |
1128 | switch(appliedPolicy.d_kind) { | |
1129 | case DNSFilterEngine::PolicyKind::NoAction: | |
1130 | break; | |
1131 | case DNSFilterEngine::PolicyKind::Drop: | |
1132 | g_stats.policyDrops++; | |
7a25883a | 1133 | g_stats.policyResults[appliedPolicy.d_kind]++; |
b8470add PL |
1134 | delete dc; |
1135 | dc=0; | |
1136 | return; | |
1137 | case DNSFilterEngine::PolicyKind::NXDOMAIN: | |
1138 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
1139 | res=RCode::NXDomain; | |
1140 | goto haveAnswer; | |
1141 | case DNSFilterEngine::PolicyKind::NODATA: | |
1142 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
1143 | res=RCode::NoError; | |
db486de5 | 1144 | goto haveAnswer; |
b8470add PL |
1145 | case DNSFilterEngine::PolicyKind::Custom: |
1146 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
1147 | res=RCode::NoError; | |
a9e029ee | 1148 | spoofed=appliedPolicy.getCustomRecord(dc->d_mdp.d_qname); |
b8470add | 1149 | ret.push_back(spoofed); |
53508135 | 1150 | handleRPZCustom(spoofed, QType(dc->d_mdp.d_qtype), sr, res, ret); |
b8470add PL |
1151 | goto haveAnswer; |
1152 | case DNSFilterEngine::PolicyKind::Truncate: | |
1153 | if(!dc->d_tcp) { | |
1154 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
1155 | res=RCode::NoError; | |
1156 | pw.getHeader()->tc=1; | |
1157 | goto haveAnswer; | |
1158 | } | |
1159 | break; | |
1160 | } | |
db486de5 PL |
1161 | } |
1162 | ||
b8470add | 1163 | // Query got not handled for QNAME Policy reasons, now actually go out to find an answer |
44971ca0 PD |
1164 | try { |
1165 | res = sr.beginResolve(dc->d_mdp.d_qname, QType(dc->d_mdp.d_qtype), dc->d_mdp.d_qclass, ret); | |
9fc36e90 | 1166 | shouldNotValidate = sr.wasOutOfBand(); |
44971ca0 PD |
1167 | } |
1168 | catch(ImmediateServFailException &e) { | |
854d44e3 | 1169 | if(g_logCommonErrors) |
e6a9dde5 | 1170 | g_log<<Logger::Notice<<"Sending SERVFAIL to "<<dc->getRemote()<<" during resolve of '"<<dc->d_mdp.d_qname<<"' because: "<<e.reason<<endl; |
44971ca0 PD |
1171 | res = RCode::ServFail; |
1172 | } | |
4485aa35 | 1173 | |
1921a4c2 RG |
1174 | dq.validationState = sr.getValidationState(); |
1175 | ||
b8470add PL |
1176 | // During lookup, an NSDNAME or NSIP trigger was hit in RPZ |
1177 | if (res == -2) { // XXX This block should be macro'd, it is repeated post-resolve. | |
1178 | appliedPolicy = sr.d_appliedPolicy; | |
1179 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
1180 | switch(appliedPolicy.d_kind) { | |
1181 | case DNSFilterEngine::PolicyKind::NoAction: // This can never happen | |
1182 | throw PDNSException("NoAction policy returned while a NSDNAME or NSIP trigger was hit"); | |
1183 | case DNSFilterEngine::PolicyKind::Drop: | |
1184 | g_stats.policyDrops++; | |
1185 | delete dc; | |
1186 | dc=0; | |
1187 | return; | |
1188 | case DNSFilterEngine::PolicyKind::NXDOMAIN: | |
1189 | ret.clear(); | |
1190 | res=RCode::NXDomain; | |
1191 | goto haveAnswer; | |
1192 | ||
1193 | case DNSFilterEngine::PolicyKind::NODATA: | |
1194 | ret.clear(); | |
1195 | res=RCode::NoError; | |
1196 | goto haveAnswer; | |
1197 | ||
1198 | case DNSFilterEngine::PolicyKind::Truncate: | |
1199 | if(!dc->d_tcp) { | |
1200 | ret.clear(); | |
1201 | res=RCode::NoError; | |
1202 | pw.getHeader()->tc=1; | |
1203 | goto haveAnswer; | |
1204 | } | |
1205 | break; | |
1206 | ||
1207 | case DNSFilterEngine::PolicyKind::Custom: | |
1208 | ret.clear(); | |
1209 | res=RCode::NoError; | |
a9e029ee | 1210 | spoofed=appliedPolicy.getCustomRecord(dc->d_mdp.d_qname); |
b8470add | 1211 | ret.push_back(spoofed); |
53508135 | 1212 | handleRPZCustom(spoofed, QType(dc->d_mdp.d_qtype), sr, res, ret); |
b8470add PL |
1213 | goto haveAnswer; |
1214 | } | |
1215 | } | |
1216 | ||
1217 | if (wantsRPZ) { | |
1f1ca368 | 1218 | appliedPolicy = luaconfsLocal->dfe.getPostPolicy(ret, sr.d_discardedPolicies); |
b8470add | 1219 | } |
db486de5 | 1220 | |
f26bf547 | 1221 | if(t_pdl) { |
db486de5 PL |
1222 | if(res == RCode::NoError) { |
1223 | auto i=ret.cbegin(); | |
1224 | for(; i!= ret.cend(); ++i) | |
1225 | if(i->d_type == dc->d_mdp.d_qtype && i->d_place == DNSResourceRecord::ANSWER) | |
1226 | break; | |
f26bf547 | 1227 | if(i == ret.cend() && t_pdl->nodata(dq, res)) |
3ca4e735 PL |
1228 | shouldNotValidate = true; |
1229 | ||
db486de5 | 1230 | } |
f26bf547 | 1231 | else if(res == RCode::NXDomain && t_pdl->nxdomain(dq, res)) |
3ca4e735 | 1232 | shouldNotValidate = true; |
db486de5 | 1233 | |
f26bf547 | 1234 | if(t_pdl->postresolve(dq, res)) |
3ca4e735 | 1235 | shouldNotValidate = true; |
db486de5 PL |
1236 | } |
1237 | ||
b8470add PL |
1238 | if (wantsRPZ) { //XXX This block is repeated, see above |
1239 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
1240 | switch(appliedPolicy.d_kind) { | |
1241 | case DNSFilterEngine::PolicyKind::NoAction: | |
1242 | break; | |
1243 | case DNSFilterEngine::PolicyKind::Drop: | |
1244 | g_stats.policyDrops++; | |
1245 | delete dc; | |
1246 | dc=0; | |
1247 | return; | |
1248 | case DNSFilterEngine::PolicyKind::NXDOMAIN: | |
1249 | ret.clear(); | |
1250 | res=RCode::NXDomain; | |
1251 | goto haveAnswer; | |
1252 | ||
1253 | case DNSFilterEngine::PolicyKind::NODATA: | |
1254 | ret.clear(); | |
1255 | res=RCode::NoError; | |
1256 | goto haveAnswer; | |
1257 | ||
1258 | case DNSFilterEngine::PolicyKind::Truncate: | |
1259 | if(!dc->d_tcp) { | |
1260 | ret.clear(); | |
1261 | res=RCode::NoError; | |
1262 | pw.getHeader()->tc=1; | |
1263 | goto haveAnswer; | |
1264 | } | |
1265 | break; | |
1266 | ||
1267 | case DNSFilterEngine::PolicyKind::Custom: | |
1268 | ret.clear(); | |
1269 | res=RCode::NoError; | |
a9e029ee | 1270 | spoofed=appliedPolicy.getCustomRecord(dc->d_mdp.d_qname); |
b8470add | 1271 | ret.push_back(spoofed); |
53508135 | 1272 | handleRPZCustom(spoofed, QType(dc->d_mdp.d_qtype), sr, res, ret); |
b8470add PL |
1273 | goto haveAnswer; |
1274 | } | |
644dd1da | 1275 | } |
4485aa35 | 1276 | } |
644dd1da | 1277 | haveAnswer:; |
3e8216c8 | 1278 | if(res == PolicyDecision::DROP) { |
e9c2ad3a | 1279 | g_stats.policyDrops++; |
ae7e77ad | 1280 | delete dc; |
1281 | dc=0; | |
1282 | return; | |
3ddb9247 | 1283 | } |
9cdfab64 | 1284 | if(tracedQuery || res == -1 || res == RCode::ServFail || pw.getHeader()->rcode == RCode::ServFail) |
1dc8f4d0 | 1285 | { |
85ffbc53 PD |
1286 | string trace(sr.getTrace()); |
1287 | if(!trace.empty()) { | |
1288 | vector<string> lines; | |
1289 | boost::split(lines, trace, boost::is_any_of("\n")); | |
1dc8f4d0 | 1290 | for(const string& line : lines) { |
85ffbc53 | 1291 | if(!line.empty()) |
e6a9dde5 | 1292 | g_log<<Logger::Warning<< line << endl; |
85ffbc53 PD |
1293 | } |
1294 | } | |
1295 | } | |
3ddb9247 | 1296 | |
9cdfab64 | 1297 | if(res == -1) { |
0fe1d080 PD |
1298 | pw.getHeader()->rcode=RCode::ServFail; |
1299 | // no commit here, because no record | |
1300 | g_stats.servFails++; | |
1301 | } | |
288f4aa9 | 1302 | else { |
ea634573 | 1303 | pw.getHeader()->rcode=res; |
92011b8f | 1304 | |
f3fe4ae6 | 1305 | // Does the validation mode or query demand validation? |
0c43f455 | 1306 | if(!shouldNotValidate && sr.isDNSSECValidationRequested()) { |
b25cae9a | 1307 | try { |
f3fe4ae6 | 1308 | if(sr.doLog()) { |
e6a9dde5 | 1309 | g_log<<Logger::Warning<<"Starting validation of answer to "<<dc->d_mdp.d_qname<<"|"<<QType(dc->d_mdp.d_qtype).getName()<<" for "<<dc->getRemote()<<endl; |
2e921ec6 | 1310 | } |
4d2be65d RG |
1311 | |
1312 | auto state = sr.getValidationState(); | |
1313 | ||
b25cae9a | 1314 | if(state == Secure) { |
2e921ec6 | 1315 | if(sr.doLog()) { |
e6a9dde5 | 1316 | g_log<<Logger::Warning<<"Answer to "<<dc->d_mdp.d_qname<<"|"<<QType(dc->d_mdp.d_qtype).getName()<<" for "<<dc->getRemote()<<" validates correctly"<<endl; |
2e921ec6 | 1317 | } |
b25cae9a | 1318 | |
1319 | // Is the query source interested in the value of the ad-bit? | |
885c8881 | 1320 | if (dc->d_mdp.d_header.ad || DNSSECOK) |
b25cae9a | 1321 | pw.getHeader()->ad=1; |
1322 | } | |
1323 | else if(state == Insecure) { | |
f3fe4ae6 | 1324 | if(sr.doLog()) { |
e6a9dde5 | 1325 | g_log<<Logger::Warning<<"Answer to "<<dc->d_mdp.d_qname<<"|"<<QType(dc->d_mdp.d_qtype).getName()<<" for "<<dc->getRemote()<<" validates as Insecure"<<endl; |
12ce523e | 1326 | } |
b25cae9a | 1327 | |
1328 | pw.getHeader()->ad=0; | |
f3fe4ae6 | 1329 | } |
b25cae9a | 1330 | else if(state == Bogus) { |
66f2e6ad KM |
1331 | if(t_bogusremotes) |
1332 | t_bogusremotes->push_back(dc->d_source); | |
1333 | if(t_bogusqueryring) | |
1334 | t_bogusqueryring->push_back(make_pair(dc->d_mdp.d_qname, dc->d_mdp.d_qtype)); | |
c87e1876 | 1335 | if(g_dnssecLogBogus || sr.doLog() || g_dnssecmode == DNSSECMode::ValidateForLog) { |
e6a9dde5 | 1336 | g_log<<Logger::Warning<<"Answer to "<<dc->d_mdp.d_qname<<"|"<<QType(dc->d_mdp.d_qtype).getName()<<" for "<<dc->getRemote()<<" validates as Bogus"<<endl; |
b25cae9a | 1337 | } |
1338 | ||
1339 | // Does the query or validation mode sending out a SERVFAIL on validation errors? | |
885c8881 | 1340 | if(!pw.getHeader()->cd && (g_dnssecmode == DNSSECMode::ValidateAll || dc->d_mdp.d_header.ad || DNSSECOK)) { |
b25cae9a | 1341 | if(sr.doLog()) { |
e6a9dde5 | 1342 | g_log<<Logger::Warning<<"Sending out SERVFAIL for "<<dc->d_mdp.d_qname<<"|"<<QType(dc->d_mdp.d_qtype).getName()<<" because recursor or query demands it for Bogus results"<<endl; |
b25cae9a | 1343 | } |
1344 | ||
1345 | pw.getHeader()->rcode=RCode::ServFail; | |
1346 | goto sendit; | |
1347 | } else { | |
1348 | if(sr.doLog()) { | |
e6a9dde5 | 1349 | g_log<<Logger::Warning<<"Not sending out SERVFAIL for "<<dc->d_mdp.d_qname<<"|"<<QType(dc->d_mdp.d_qtype).getName()<<" Bogus validation since neither config nor query demands this"<<endl; |
b25cae9a | 1350 | } |
1351 | } | |
1352 | } | |
1353 | } | |
1354 | catch(ImmediateServFailException &e) { | |
1355 | if(g_logCommonErrors) | |
e6a9dde5 | 1356 | g_log<<Logger::Notice<<"Sending SERVFAIL to "<<dc->getRemote()<<" during validation of '"<<dc->d_mdp.d_qname<<"|"<<QType(dc->d_mdp.d_qtype).getName()<<"' because: "<<e.reason<<endl; |
b25cae9a | 1357 | pw.getHeader()->rcode=RCode::ServFail; |
1358 | goto sendit; | |
f3fe4ae6 | 1359 | } |
b3f0ed10 | 1360 | } |
1361 | ||
c154c8a4 | 1362 | if(ret.size()) { |
92476c8b | 1363 | orderAndShuffle(ret); |
5cc8371b | 1364 | if(auto sl = luaconfsLocal->sortlist.getOrderCmp(dc->d_source)) { |
20d84f77 | 1365 | stable_sort(ret.begin(), ret.end(), *sl); |
3e61e7f7 | 1366 | variableAnswer=true; |
1367 | } | |
8e079f3a | 1368 | } |
0afa32d4 RG |
1369 | |
1370 | bool needCommit = false; | |
8e079f3a | 1371 | for(auto i=ret.cbegin(); i!=ret.cend(); ++i) { |
3e80ebce KM |
1372 | if( ! DNSSECOK && |
1373 | ( i->d_type == QType::NSEC3 || | |
1374 | ( | |
1375 | ( i->d_type == QType::RRSIG || i->d_type==QType::NSEC ) && | |
1376 | ( | |
1377 | ( dc->d_mdp.d_qtype != i->d_type && dc->d_mdp.d_qtype != QType::ANY ) || | |
1378 | i->d_place != DNSResourceRecord::ANSWER | |
1379 | ) | |
1380 | ) | |
1381 | ) | |
1382 | ) { | |
2e921ec6 | 1383 | continue; |
3e80ebce KM |
1384 | } |
1385 | ||
70fb28d9 | 1386 | if (!addRecordToPacket(pw, *i, minTTL, dc->d_ttlCap, maxanswersize)) { |
97c6d7e5 RG |
1387 | needCommit = false; |
1388 | break; | |
1389 | } | |
1390 | needCommit = true; | |
1391 | ||
aa7929a3 | 1392 | #ifdef HAVE_PROTOBUF |
63341e8d | 1393 | if(t_protobufServer && (i->d_type == QType::A || i->d_type == QType::AAAA || i->d_type == QType::CNAME)) { |
d362f7c1 | 1394 | pbMessage->addRR(*i); |
aa7929a3 RG |
1395 | } |
1396 | #endif | |
ea634573 | 1397 | } |
0afa32d4 | 1398 | if(needCommit) |
8e079f3a | 1399 | pw.commit(); |
288f4aa9 | 1400 | } |
10321a98 | 1401 | sendit:; |
b3f0ed10 | 1402 | |
97c6d7e5 RG |
1403 | if (haveEDNS) { |
1404 | /* we try to add the EDNS OPT RR even for truncated answers, | |
1405 | as rfc6891 states: | |
1406 | "The minimal response MUST be the DNS header, question section, and an | |
1407 | OPT record. This MUST also occur when a truncated response (using | |
1408 | the DNS header's TC bit) is returned." | |
1409 | */ | |
9b60fb71 | 1410 | pw.addOpt(512, ednsExtRCode, DNSSECOK ? EDNSOpts::DNSSECOK : 0, returnedEdnsOptions); |
1f691b94 | 1411 | pw.commit(); |
97c6d7e5 RG |
1412 | } |
1413 | ||
79332bff | 1414 | g_rs.submitResponse(dc->d_mdp.d_qtype, packet.size(), !dc->d_tcp); |
5cc8371b | 1415 | updateResponseStats(res, dc->d_source, packet.size(), &dc->d_mdp.d_qname, dc->d_mdp.d_qtype); |
aa7929a3 | 1416 | #ifdef HAVE_PROTOBUF |
845cbf4c | 1417 | if (t_protobufServer && logResponse && !(luaconfsLocal->protobufExportConfig.taggedOnly && (!appliedPolicy.d_name || appliedPolicy.d_name->empty()) && dc->d_policyTags.empty())) { |
d362f7c1 RG |
1418 | pbMessage->setBytes(packet.size()); |
1419 | pbMessage->setResponseCode(pw.getHeader()->rcode); | |
0a273054 | 1420 | if (appliedPolicy.d_name) { |
d362f7c1 RG |
1421 | pbMessage->setAppliedPolicy(*appliedPolicy.d_name); |
1422 | pbMessage->setAppliedPolicyType(appliedPolicy.d_type); | |
0a273054 | 1423 | } |
d362f7c1 RG |
1424 | pbMessage->setPolicyTags(dc->d_policyTags); |
1425 | pbMessage->setQueryTime(dc->d_now.tv_sec, dc->d_now.tv_usec); | |
1426 | pbMessage->setRequestorId(dq.requestorId); | |
1427 | pbMessage->setDeviceId(dq.deviceId); | |
63341e8d | 1428 | protobufLogResponse(t_protobufServer, *pbMessage); |
aa7929a3 RG |
1429 | } |
1430 | #endif | |
ea634573 | 1431 | if(!dc->d_tcp) { |
b71b60ee | 1432 | struct msghdr msgh; |
1433 | struct iovec iov; | |
1434 | char cbuf[256]; | |
1435 | fillMSGHdr(&msgh, &iov, cbuf, 0, (char*)&*packet.begin(), packet.size(), &dc->d_remote); | |
2c0af54f PD |
1436 | msgh.msg_control=NULL; |
1437 | ||
cbc03320 | 1438 | if(g_fromtosockets.count(dc->d_socket)) { |
fbe2a2e0 | 1439 | addCMsgSrcAddr(&msgh, cbuf, &dc->d_local, 0); |
2c0af54f | 1440 | } |
cbc03320 | 1441 | if(sendmsg(dc->d_socket, &msgh, 0) < 0 && g_logCommonErrors) |
e6a9dde5 | 1442 | g_log<<Logger::Warning<<"Sending UDP reply to client "<<dc->getRemote()<<" failed with: "<<strerror(errno)<<endl; |
70fb28d9 | 1443 | |
3762e821 | 1444 | if(!SyncRes::s_nopacketcache && !variableAnswer && !sr.wasVariable() ) { |
e9f63d47 | 1445 | t_packetCache->insertResponsePacket(dc->d_tag, dc->d_qhash, dc->d_mdp.d_qname, dc->d_mdp.d_qtype, dc->d_mdp.d_qclass, |
76e2b9e3 | 1446 | string((const char*)&*packet.begin(), packet.size()), |
3ddb9247 | 1447 | g_now.tv_sec, |
76e2b9e3 | 1448 | pw.getHeader()->rcode == RCode::ServFail ? SyncRes::s_packetcacheservfailttl : |
d9d3f9c1 | 1449 | min(minTTL,SyncRes::s_packetcachettl), |
88694a6a | 1450 | dq.validationState, |
d362f7c1 | 1451 | pbMessage); |
1051f8a9 | 1452 | } |
3762e821 | 1453 | // else cerr<<"Not putting in packet cache: "<<sr.wasVariable()<<endl; |
feccc9fc | 1454 | } |
9c495589 BH |
1455 | else { |
1456 | char buf[2]; | |
ea634573 BH |
1457 | buf[0]=packet.size()/256; |
1458 | buf[1]=packet.size()%256; | |
feccc9fc | 1459 | |
c038218b | 1460 | Utility::iovec iov[2]; |
feccc9fc | 1461 | |
ea634573 BH |
1462 | iov[0].iov_base=(void*)buf; iov[0].iov_len=2; |
1463 | iov[1].iov_base=(void*)&*packet.begin(); iov[1].iov_len = packet.size(); | |
feccc9fc | 1464 | |
dd079764 | 1465 | int wret=Utility::writev(dc->d_socket, iov, 2); |
0e9d9ce2 | 1466 | bool hadError=true; |
feccc9fc | 1467 | |
dd079764 | 1468 | if(wret == 0) |
e6a9dde5 | 1469 | g_log<<Logger::Error<<"EOF writing TCP answer to "<<dc->getRemote()<<endl; |
dd079764 | 1470 | else if(wret < 0 ) |
e6a9dde5 | 1471 | g_log<<Logger::Error<<"Error writing TCP answer to "<<dc->getRemote()<<": "<< strerror(errno) <<endl; |
dd079764 | 1472 | else if((unsigned int)wret != 2 + packet.size()) |
e6a9dde5 | 1473 | g_log<<Logger::Error<<"Oops, partial answer sent to "<<dc->getRemote()<<" for "<<dc->d_mdp.d_qname<<" (size="<< (2 + packet.size()) <<", sent "<<wret<<")"<<endl; |
0e9d9ce2 | 1474 | else |
18af64a8 | 1475 | hadError=false; |
3ddb9247 | 1476 | |
09e6702a | 1477 | // update tcp connection status, either by closing or moving to 'BYTE0' |
3ddb9247 | 1478 | |
09e6702a | 1479 | if(hadError) { |
18af64a8 | 1480 | // no need to remove us from FDM, we weren't there |
c36bc97a | 1481 | dc->d_socket = -1; |
09e6702a | 1482 | } |
a6ae6414 | 1483 | else { |
fde296a3 RG |
1484 | dc->d_tcpConnection->queriesCount++; |
1485 | if (g_tcpMaxQueriesPerConn && dc->d_tcpConnection->queriesCount >= g_tcpMaxQueriesPerConn) { | |
1486 | dc->d_socket = -1; | |
1487 | } | |
1488 | else { | |
1489 | dc->d_tcpConnection->state=TCPConnection::BYTE0; | |
1490 | Utility::gettimeofday(&g_now, 0); // needs to be updated | |
1491 | t_fdm->addReadFD(dc->d_socket, handleRunningTCPQuestion, dc->d_tcpConnection); | |
1492 | t_fdm->setReadTTD(dc->d_socket, g_now, g_tcpTimeout); | |
1493 | } | |
0e9d9ce2 | 1494 | } |
9c495589 | 1495 | } |
2c9119cd | 1496 | float spent=makeFloat(sr.getNow()-dc->d_now); |
1d5b3ce6 | 1497 | if(!g_quiet) { |
e6a9dde5 PL |
1498 | g_log<<Logger::Error<<t_id<<" ["<<MT->getTid()<<"/"<<MT->numProcesses()<<"] answer to "<<(dc->d_mdp.d_header.rd?"":"non-rd ")<<"question '"<<dc->d_mdp.d_qname<<"|"<<DNSRecordContent::NumberToType(dc->d_mdp.d_qtype); |
1499 | g_log<<"': "<<ntohs(pw.getHeader()->ancount)<<" answers, "<<ntohs(pw.getHeader()->arcount)<<" additional, took "<<sr.d_outqueries<<" packets, "<< | |
2c9119cd | 1500 | sr.d_totUsec/1000.0<<" netw ms, "<< spent*1000.0<<" tot ms, "<< |
1501 | sr.d_throttledqueries<<" throttled, "<<sr.d_timeouts<<" timeouts, "<<sr.d_tcpoutqueries<<" tcp connections, rcode="<< res; | |
1502 | ||
1503 | if(!shouldNotValidate && sr.isDNSSECValidationRequested()) { | |
e6a9dde5 | 1504 | g_log<< ", dnssec="<<vStates[sr.getValidationState()]; |
2c9119cd | 1505 | } |
1506 | ||
e6a9dde5 | 1507 | g_log<<endl; |
2c9119cd | 1508 | |
c75a6a9e | 1509 | } |
b23b8614 | 1510 | |
f7b8cffa RG |
1511 | if (sr.d_outqueries || sr.d_authzonequeries) { |
1512 | t_RC->cacheMisses++; | |
af1377b7 NC |
1513 | #ifdef NOD_ENABLED |
1514 | if (g_nodEnabled) { | |
1515 | nodCheckNewDomain(dc->d_mdp.d_qname); | |
1516 | } | |
1517 | #endif /* NOD_ENABLED */ | |
f7b8cffa RG |
1518 | } |
1519 | else { | |
1520 | t_RC->cacheHits++; | |
af1377b7 NC |
1521 | #ifdef NOD_ENABLED |
1522 | if (g_nodEnabled) { | |
1523 | nodAddDomain(dc->d_mdp.d_qname); | |
1524 | } | |
1525 | #endif /* NOD_ENABLED */ | |
f7b8cffa | 1526 | } |
2c9119cd | 1527 | |
fe213470 BH |
1528 | if(spent < 0.001) |
1529 | g_stats.answers0_1++; | |
1530 | else if(spent < 0.010) | |
1531 | g_stats.answers1_10++; | |
1532 | else if(spent < 0.1) | |
1533 | g_stats.answers10_100++; | |
1534 | else if(spent < 1.0) | |
1535 | g_stats.answers100_1000++; | |
1536 | else | |
1537 | g_stats.answersSlow++; | |
1538 | ||
574af7ea | 1539 | uint64_t newLat=(uint64_t)(spent*1000000); |
b841314c | 1540 | newLat = min(newLat,(uint64_t)(((uint64_t) g_networkTimeoutMsec)*1000)); // outliers of several minutes exist.. |
08f3f638 | 1541 | g_stats.avgLatencyUsec=(1-1.0/g_latencyStatSize)*g_stats.avgLatencyUsec + (float)newLat/g_latencyStatSize; |
0a6b1027 | 1542 | // no worries, we do this for packet cache hits elsewhere |
19178da9 | 1543 | |
1544 | auto ourtime = 1000.0*spent-sr.d_totUsec/1000.0; // in msec | |
1545 | if(ourtime < 1) | |
1546 | g_stats.ourtime0_1++; | |
1547 | else if(ourtime < 2) | |
1548 | g_stats.ourtime1_2++; | |
1549 | else if(ourtime < 4) | |
1550 | g_stats.ourtime2_4++; | |
1551 | else if(ourtime < 8) | |
1552 | g_stats.ourtime4_8++; | |
1553 | else if(ourtime < 16) | |
1554 | g_stats.ourtime8_16++; | |
1555 | else if(ourtime < 32) | |
1556 | g_stats.ourtime16_32++; | |
1557 | else { | |
1558 | // cerr<<"SLOW: "<<ourtime<<"ms -> "<<dc->d_mdp.d_qname<<"|"<<DNSRecordContent::NumberToType(dc->d_mdp.d_qtype)<<endl; | |
1559 | g_stats.ourtimeSlow++; | |
1560 | } | |
042da1a1 | 1561 | if(ourtime >= 0.0) { |
1562 | newLat=ourtime*1000; // usec | |
1563 | g_stats.avgLatencyOursUsec=(1-1.0/g_latencyStatSize)*g_stats.avgLatencyOursUsec + (float)newLat/g_latencyStatSize; | |
1564 | } | |
c6d04bdc | 1565 | // cout<<dc->d_mdp.d_qname<<"\t"<<MT->getUsec()<<"\t"<<sr.d_outqueries<<endl; |
ea634573 | 1566 | delete dc; |
c36bc97a | 1567 | dc=0; |
288f4aa9 | 1568 | } |
3f81d239 | 1569 | catch(PDNSException &ae) { |
e6a9dde5 | 1570 | g_log<<Logger::Error<<"startDoResolve problem "<<makeLoginfo(dc)<<": "<<ae.reason<<endl; |
c36bc97a | 1571 | delete dc; |
288f4aa9 | 1572 | } |
7b1469bb | 1573 | catch(MOADNSException& e) { |
e6a9dde5 | 1574 | g_log<<Logger::Error<<"DNS parser error "<<makeLoginfo(dc) <<": "<<dc->d_mdp.d_qname<<", "<<e.what()<<endl; |
c36bc97a | 1575 | delete dc; |
7b1469bb | 1576 | } |
fdbf35ac | 1577 | catch(std::exception& e) { |
e6a9dde5 | 1578 | g_log<<Logger::Error<<"STL error "<< makeLoginfo(dc)<<": "<<e.what(); |
068c7634 PD |
1579 | |
1580 | // Luawrapper nests the exception from Lua, so we unnest it here | |
1581 | try { | |
1582 | std::rethrow_if_nested(e); | |
2010ac95 | 1583 | } catch(const std::exception& ne) { |
e6a9dde5 | 1584 | g_log<<". Extra info: "<<ne.what(); |
068c7634 PD |
1585 | } catch(...) {} |
1586 | ||
e6a9dde5 | 1587 | g_log<<endl; |
c36bc97a | 1588 | delete dc; |
c154c8a4 | 1589 | } |
288f4aa9 | 1590 | catch(...) { |
e6a9dde5 | 1591 | g_log<<Logger::Error<<"Any other exception in a resolver context "<< makeLoginfo(dc) <<endl; |
288f4aa9 | 1592 | } |
3ddb9247 | 1593 | |
ec6eacbc | 1594 | g_stats.maxMThreadStackUsage = max(MT->getMaxStackUsage(), g_stats.maxMThreadStackUsage); |
288f4aa9 BH |
1595 | } |
1596 | ||
d187038c | 1597 | static void makeControlChannelSocket(int processNum=-1) |
1d5b3ce6 | 1598 | { |
2d733c0f | 1599 | string sockname=::arg()["socket-dir"]+"/"+s_programname; |
677e2a46 | 1600 | if(processNum >= 0) |
335da0ba | 1601 | sockname += "."+std::to_string(processNum); |
677e2a46 | 1602 | sockname+=".controlsocket"; |
41f7a068 | 1603 | s_rcc.listen(sockname); |
3ddb9247 | 1604 | |
387de317 BH |
1605 | int sockowner = -1; |
1606 | int sockgroup = -1; | |
1607 | ||
1608 | if (!::arg().isEmpty("socket-group")) | |
1609 | sockgroup=::arg().asGid("socket-group"); | |
1610 | if (!::arg().isEmpty("socket-owner")) | |
1611 | sockowner=::arg().asUid("socket-owner"); | |
3ddb9247 | 1612 | |
f838ad8d BH |
1613 | if (sockgroup > -1 || sockowner > -1) { |
1614 | if(chown(sockname.c_str(), sockowner, sockgroup) < 0) { | |
1615 | unixDie("Failed to chown control socket"); | |
1616 | } | |
1617 | } | |
387de317 BH |
1618 | |
1619 | // do mode change if socket-mode is given | |
1620 | if(!::arg().isEmpty("socket-mode")) { | |
1621 | mode_t sockmode=::arg().asMode("socket-mode"); | |
34c513f9 RG |
1622 | if(chmod(sockname.c_str(), sockmode) < 0) { |
1623 | unixDie("Failed to chmod control socket"); | |
1624 | } | |
387de317 | 1625 | } |
1d5b3ce6 BH |
1626 | } |
1627 | ||
5cc8371b | 1628 | static void getQNameAndSubnet(const std::string& question, DNSName* dnsname, uint16_t* qtype, uint16_t* qclass, |
29e6303a | 1629 | bool& foundECS, EDNSSubnetOpts* ednssubnet, EDNSOptionViewMap* options, |
5cc8371b | 1630 | bool& foundXPF, ComboAddress* xpfSource, ComboAddress* xpfDest) |
02b47f43 | 1631 | { |
59cb4a79 | 1632 | const bool lookForXPF = xpfSource != nullptr && g_xpfRRCode != 0; |
5cc8371b RG |
1633 | const bool lookForECS = ednssubnet != nullptr; |
1634 | const struct dnsheader* dh = reinterpret_cast<const struct dnsheader*>(question.c_str()); | |
02b47f43 RG |
1635 | size_t questionLen = question.length(); |
1636 | unsigned int consumed=0; | |
1637 | *dnsname=DNSName(question.c_str(), questionLen, sizeof(dnsheader), false, qtype, qclass, &consumed); | |
1638 | ||
1639 | size_t pos= sizeof(dnsheader)+consumed+4; | |
5cc8371b RG |
1640 | const size_t headerSize = /* root */ 1 + sizeof(dnsrecordheader); |
1641 | const uint16_t arcount = ntohs(dh->arcount); | |
1642 | ||
1643 | for (uint16_t arpos = 0; arpos < arcount && questionLen > (pos + headerSize) && ((lookForECS && !foundECS) || (lookForXPF && !foundXPF)); arpos++) { | |
1644 | if (question.at(pos) != 0) { | |
1645 | /* not an OPT or a XPF, bye. */ | |
1646 | return; | |
1647 | } | |
1648 | ||
1649 | pos += 1; | |
1650 | const dnsrecordheader* drh = reinterpret_cast<const dnsrecordheader*>(&question.at(pos)); | |
1651 | pos += sizeof(dnsrecordheader); | |
1652 | ||
1653 | if (pos >= questionLen) { | |
1654 | return; | |
1655 | } | |
1656 | ||
02b47f43 | 1657 | /* OPT root label (1) followed by type (2) */ |
5cc8371b | 1658 | if(lookForECS && ntohs(drh->d_type) == QType::OPT) { |
00b8cadc RG |
1659 | if (!options) { |
1660 | char* ecsStart = nullptr; | |
1661 | size_t ecsLen = 0; | |
5cc8371b RG |
1662 | /* we need to pass the record len */ |
1663 | int res = getEDNSOption(const_cast<char*>(reinterpret_cast<const char*>(&question.at(pos - sizeof(drh->d_clen)))), questionLen - pos + sizeof(drh->d_clen), EDNSOptionCode::ECS, &ecsStart, &ecsLen); | |
00b8cadc RG |
1664 | if (res == 0 && ecsLen > 4) { |
1665 | EDNSSubnetOpts eso; | |
1666 | if(getEDNSSubnetOptsFromString(ecsStart + 4, ecsLen - 4, &eso)) { | |
1667 | *ednssubnet=eso; | |
5cc8371b | 1668 | foundECS = true; |
00b8cadc RG |
1669 | } |
1670 | } | |
1671 | } | |
1672 | else { | |
5cc8371b RG |
1673 | /* we need to pass the record len */ |
1674 | int res = getEDNSOptions(reinterpret_cast<const char*>(&question.at(pos -sizeof(drh->d_clen))), questionLen - pos + (sizeof(drh->d_clen)), *options); | |
00b8cadc RG |
1675 | if (res == 0) { |
1676 | const auto& it = options->find(EDNSOptionCode::ECS); | |
29e6303a | 1677 | if (it != options->end() && !it->second.values.empty() && it->second.values.at(0).content != nullptr && it->second.values.at(0).size > 0) { |
00b8cadc | 1678 | EDNSSubnetOpts eso; |
29e6303a | 1679 | if(getEDNSSubnetOptsFromString(it->second.values.at(0).content, it->second.values.at(0).size, &eso)) { |
00b8cadc | 1680 | *ednssubnet=eso; |
5cc8371b | 1681 | foundECS = true; |
00b8cadc RG |
1682 | } |
1683 | } | |
02b47f43 RG |
1684 | } |
1685 | } | |
1686 | } | |
59cb4a79 | 1687 | else if (lookForXPF && ntohs(drh->d_type) == g_xpfRRCode && ntohs(drh->d_class) == QClass::IN && drh->d_ttl == 0) { |
5cc8371b RG |
1688 | if ((questionLen - pos) < ntohs(drh->d_clen)) { |
1689 | return; | |
1690 | } | |
1691 | ||
1692 | foundXPF = parseXPFPayload(reinterpret_cast<const char*>(&question.at(pos)), ntohs(drh->d_clen), *xpfSource, xpfDest); | |
1693 | } | |
1694 | ||
1695 | pos += ntohs(drh->d_clen); | |
02b47f43 RG |
1696 | } |
1697 | } | |
1698 | ||
d187038c | 1699 | static void handleRunningTCPQuestion(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 1700 | { |
cd989c87 | 1701 | shared_ptr<TCPConnection> conn=any_cast<shared_ptr<TCPConnection> >(var); |
c038218b | 1702 | |
879b3f70 | 1703 | if(conn->state==TCPConnection::BYTE0) { |
2749c3fe | 1704 | ssize_t bytes=recv(conn->getFD(), &conn->data[0], 2, 0); |
09e6702a | 1705 | if(bytes==1) |
667f7e60 | 1706 | conn->state=TCPConnection::BYTE1; |
3ddb9247 | 1707 | if(bytes==2) { |
a0aa4f64 | 1708 | conn->qlen=(((unsigned char)conn->data[0]) << 8)+ (unsigned char)conn->data[1]; |
2749c3fe | 1709 | conn->data.resize(conn->qlen); |
667f7e60 BH |
1710 | conn->bytesread=0; |
1711 | conn->state=TCPConnection::GETQUESTION; | |
09e6702a BH |
1712 | } |
1713 | if(!bytes || bytes < 0) { | |
bb4bdbaf | 1714 | t_fdm->removeReadFD(fd); |
09e6702a BH |
1715 | return; |
1716 | } | |
1717 | } | |
667f7e60 | 1718 | else if(conn->state==TCPConnection::BYTE1) { |
2749c3fe | 1719 | ssize_t bytes=recv(conn->getFD(), &conn->data[1], 1, 0); |
09e6702a | 1720 | if(bytes==1) { |
667f7e60 | 1721 | conn->state=TCPConnection::GETQUESTION; |
a0aa4f64 | 1722 | conn->qlen=(((unsigned char)conn->data[0]) << 8)+ (unsigned char)conn->data[1]; |
2749c3fe | 1723 | conn->data.resize(conn->qlen); |
667f7e60 | 1724 | conn->bytesread=0; |
09e6702a BH |
1725 | } |
1726 | if(!bytes || bytes < 0) { | |
1727 | if(g_logCommonErrors) | |
e6a9dde5 | 1728 | g_log<<Logger::Error<<"TCP client "<< conn->d_remote.toStringWithPort() <<" disconnected after first byte"<<endl; |
bb4bdbaf | 1729 | t_fdm->removeReadFD(fd); |
09e6702a BH |
1730 | return; |
1731 | } | |
1732 | } | |
667f7e60 | 1733 | else if(conn->state==TCPConnection::GETQUESTION) { |
2749c3fe | 1734 | ssize_t bytes=recv(conn->getFD(), &conn->data[conn->bytesread], conn->qlen - conn->bytesread, 0); |
f9d67b41 | 1735 | if(!bytes || bytes < 0 || bytes > std::numeric_limits<std::uint16_t>::max()) { |
c0f9be19 RG |
1736 | if(g_logCommonErrors) { |
1737 | g_log<<Logger::Error<<"TCP client "<< conn->d_remote.toStringWithPort() <<" disconnected while reading question body"<<endl; | |
1738 | } | |
bb4bdbaf | 1739 | t_fdm->removeReadFD(fd); |
09e6702a BH |
1740 | return; |
1741 | } | |
b841314c | 1742 | conn->bytesread+=(uint16_t)bytes; |
667f7e60 | 1743 | if(conn->bytesread==conn->qlen) { |
bb4bdbaf | 1744 | t_fdm->removeReadFD(fd); // should no longer awake ourselves when there is data to read |
879b3f70 | 1745 | |
f26bf547 | 1746 | DNSComboWriter* dc=nullptr; |
09e6702a | 1747 | try { |
2749c3fe | 1748 | dc=new DNSComboWriter(conn->data, g_now); |
09e6702a BH |
1749 | } |
1750 | catch(MOADNSException &mde) { | |
3ddb9247 | 1751 | g_stats.clientParseError++; |
4957a608 | 1752 | if(g_logCommonErrors) |
e6a9dde5 | 1753 | g_log<<Logger::Error<<"Unable to parse packet from TCP client "<< conn->d_remote.toStringWithPort() <<endl; |
4957a608 | 1754 | return; |
09e6702a | 1755 | } |
cd989c87 BH |
1756 | dc->d_tcpConnection = conn; // carry the torch |
1757 | dc->setSocket(conn->getFD()); // this is the only time a copy is made of the actual fd | |
09e6702a | 1758 | dc->d_tcp=true; |
5cc8371b RG |
1759 | dc->setRemote(conn->d_remote); |
1760 | dc->setSource(conn->d_remote); | |
a6147cd2 | 1761 | ComboAddress dest; |
d38e2ba9 | 1762 | dest.reset(); |
a6147cd2 | 1763 | dest.sin4.sin_family = conn->d_remote.sin4.sin_family; |
1764 | socklen_t len = dest.getSocklen(); | |
1765 | getsockname(conn->getFD(), (sockaddr*)&dest, &len); // if this fails, we're ok with it | |
1766 | dc->setLocal(dest); | |
5cc8371b | 1767 | dc->setDestination(dest); |
33dcceba RG |
1768 | DNSName qname; |
1769 | uint16_t qtype=0; | |
1770 | uint16_t qclass=0; | |
1771 | bool needECS = false; | |
5cc8371b | 1772 | bool needXPF = g_XPFAcl.match(conn->d_remote); |
67e31ebe | 1773 | string requestorId; |
590388d2 | 1774 | string deviceId; |
16bbc6e3 | 1775 | bool logQuery = false; |
aa7929a3 | 1776 | #ifdef HAVE_PROTOBUF |
02b47f43 | 1777 | auto luaconfsLocal = g_luaconfs.getLocal(); |
63341e8d | 1778 | if (checkProtobufExport(luaconfsLocal)) { |
33dcceba RG |
1779 | needECS = true; |
1780 | } | |
16bbc6e3 | 1781 | logQuery = t_protobufServer && luaconfsLocal->protobufExportConfig.logQueries; |
33dcceba RG |
1782 | #endif |
1783 | ||
70fb28d9 | 1784 | if(needECS || needXPF || (t_pdl && (t_pdl->d_gettag_ffi || t_pdl->d_gettag))) { |
33dcceba RG |
1785 | |
1786 | try { | |
29e6303a | 1787 | EDNSOptionViewMap ednsOptions; |
5cc8371b | 1788 | bool xpfFound = false; |
b40562da | 1789 | dc->d_ecsParsed = true; |
5cc8371b | 1790 | dc->d_ecsFound = false; |
2749c3fe | 1791 | getQNameAndSubnet(conn->data, &qname, &qtype, &qclass, |
5cc8371b RG |
1792 | dc->d_ecsFound, &dc->d_ednssubnet, g_gettagNeedsEDNSOptions ? &ednsOptions : nullptr, |
1793 | xpfFound, needXPF ? &dc->d_source : nullptr, needXPF ? &dc->d_destination : nullptr); | |
02b47f43 | 1794 | |
70fb28d9 | 1795 | if(t_pdl) { |
33dcceba | 1796 | try { |
70fb28d9 | 1797 | if (t_pdl->d_gettag_ffi) { |
f1c7929a | 1798 | dc->d_tag = t_pdl->gettag_ffi(dc->d_source, dc->d_ednssubnet.source, dc->d_destination, qname, qtype, &dc->d_policyTags, dc->d_data, ednsOptions, true, requestorId, deviceId, dc->d_ttlCap, dc->d_variable, logQuery); |
70fb28d9 RG |
1799 | } |
1800 | else if (t_pdl->d_gettag) { | |
1801 | dc->d_tag = t_pdl->gettag(dc->d_source, dc->d_ednssubnet.source, dc->d_destination, qname, qtype, &dc->d_policyTags, dc->d_data, ednsOptions, true, requestorId, deviceId); | |
1802 | } | |
33dcceba | 1803 | } |
70fb28d9 | 1804 | catch(const std::exception& e) { |
33dcceba | 1805 | if(g_logCommonErrors) |
e6a9dde5 | 1806 | g_log<<Logger::Warning<<"Error parsing a query packet qname='"<<qname<<"' for tag determination, setting tag=0: "<<e.what()<<endl; |
33dcceba RG |
1807 | } |
1808 | } | |
1809 | } | |
70fb28d9 | 1810 | catch(const std::exception& e) |
33dcceba RG |
1811 | { |
1812 | if(g_logCommonErrors) | |
e6a9dde5 | 1813 | g_log<<Logger::Warning<<"Error parsing a query packet for tag determination, setting tag=0: "<<e.what()<<endl; |
33dcceba RG |
1814 | } |
1815 | } | |
f52177c3 RG |
1816 | |
1817 | const struct dnsheader* dh = reinterpret_cast<const struct dnsheader*>(&conn->data[0]); | |
1818 | ||
33dcceba | 1819 | #ifdef HAVE_PROTOBUF |
63341e8d | 1820 | if(t_protobufServer || t_outgoingProtobufServer) { |
67e31ebe | 1821 | dc->d_requestorId = requestorId; |
590388d2 | 1822 | dc->d_deviceId = deviceId; |
02b47f43 | 1823 | dc->d_uuid = (*t_uuidGenerator)(); |
4898a348 | 1824 | } |
02b47f43 | 1825 | |
63341e8d | 1826 | if(t_protobufServer) { |
02b47f43 | 1827 | try { |
02b47f43 | 1828 | |
845cbf4c | 1829 | if (logQuery && !(luaconfsLocal->protobufExportConfig.taggedOnly && dc->d_policyTags.empty())) { |
63341e8d | 1830 | protobufLogQuery(t_protobufServer, luaconfsLocal->protobufMaskV4, luaconfsLocal->protobufMaskV6, dc->d_uuid, dc->d_source, dc->d_destination, dc->d_ednssubnet.source, true, dh->id, conn->qlen, qname, qtype, qclass, dc->d_policyTags, dc->d_requestorId, dc->d_deviceId); |
b790ef3d | 1831 | } |
02b47f43 RG |
1832 | } |
1833 | catch(std::exception& e) { | |
1834 | if(g_logCommonErrors) | |
e6a9dde5 | 1835 | g_log<<Logger::Warning<<"Error parsing a TCP query packet for edns subnet: "<<e.what()<<endl; |
02b47f43 RG |
1836 | } |
1837 | } | |
aa7929a3 | 1838 | #endif |
879b3f70 | 1839 | if(dc->d_mdp.d_header.qr) { |
048f5db6 | 1840 | g_stats.ignoredCount++; |
c0f9be19 RG |
1841 | if(g_logCommonErrors) { |
1842 | g_log<<Logger::Error<<"Ignoring answer from TCP client "<< dc->getRemote() <<" on server socket!"<<endl; | |
1843 | } | |
cf14c141 | 1844 | delete dc; |
4957a608 | 1845 | return; |
879b3f70 | 1846 | } |
3abcdab2 | 1847 | if(dc->d_mdp.d_header.opcode) { |
048f5db6 | 1848 | g_stats.ignoredCount++; |
c0f9be19 RG |
1849 | if(g_logCommonErrors) { |
1850 | g_log<<Logger::Error<<"Ignoring non-query opcode from TCP client "<< dc->getRemote() <<" on server socket!"<<endl; | |
1851 | } | |
1852 | delete dc; | |
1853 | return; | |
1854 | } | |
1855 | else if (dh->qdcount == 0) { | |
1856 | g_stats.emptyQueriesCount++; | |
1857 | if(g_logCommonErrors) { | |
1858 | g_log<<Logger::Error<<"Ignoring empty (qdcount == 0) query from "<< dc->getRemote() <<" on server socket!"<<endl; | |
1859 | } | |
cf14c141 | 1860 | delete dc; |
3abcdab2 PD |
1861 | return; |
1862 | } | |
09e6702a | 1863 | else { |
4957a608 BH |
1864 | ++g_stats.qcounter; |
1865 | ++g_stats.tcpqcounter; | |
50a5ef72 | 1866 | MT->makeThread(startDoResolve, dc); // deletes dc, will set state to BYTE0 again |
4957a608 | 1867 | return; |
09e6702a BH |
1868 | } |
1869 | } | |
1870 | } | |
1871 | } | |
1872 | ||
6dcd28c3 | 1873 | //! Handle new incoming TCP connection |
d187038c | 1874 | static void handleNewTCPQuestion(int fd, FDMultiplexer::funcparam_t& ) |
09e6702a | 1875 | { |
37d3f960 | 1876 | ComboAddress addr; |
09e6702a | 1877 | socklen_t addrlen=sizeof(addr); |
a683e8bd | 1878 | int newsock=accept(fd, (struct sockaddr*)&addr, &addrlen); |
b841314c | 1879 | if(newsock>=0) { |
85c32340 BH |
1880 | if(MT->numProcesses() > g_maxMThreads) { |
1881 | g_stats.overCapacityDrops++; | |
a7b68ae7 RG |
1882 | try { |
1883 | closesocket(newsock); | |
1884 | } | |
1885 | catch(const PDNSException& e) { | |
e6a9dde5 | 1886 | g_log<<Logger::Error<<"Error closing TCP socket after an over capacity drop: "<<e.reason<<endl; |
a7b68ae7 | 1887 | } |
85c32340 BH |
1888 | return; |
1889 | } | |
1890 | ||
92011b8f | 1891 | if(t_remotes) |
1892 | t_remotes->push_back(addr); | |
49a699c4 | 1893 | if(t_allowFrom && !t_allowFrom->match(&addr)) { |
3ddb9247 | 1894 | if(!g_quiet) |
e6a9dde5 | 1895 | g_log<<Logger::Error<<"["<<MT->getTid()<<"] dropping TCP query from "<<addr.toString()<<", address not matched by allow-from"<<endl; |
2914b022 | 1896 | |
09e6702a | 1897 | g_stats.unauthorizedTCP++; |
a7b68ae7 RG |
1898 | try { |
1899 | closesocket(newsock); | |
1900 | } | |
1901 | catch(const PDNSException& e) { | |
e6a9dde5 | 1902 | g_log<<Logger::Error<<"Error closing TCP socket after an ACL drop: "<<e.reason<<endl; |
a7b68ae7 | 1903 | } |
09e6702a BH |
1904 | return; |
1905 | } | |
bd0289fc | 1906 | if(g_maxTCPPerClient && t_tcpClientCounts->count(addr) && (*t_tcpClientCounts)[addr] >= g_maxTCPPerClient) { |
09e6702a | 1907 | g_stats.tcpClientOverflow++; |
a7b68ae7 RG |
1908 | try { |
1909 | closesocket(newsock); // don't call TCPConnection::closeAndCleanup here - did not enter it in the counts yet! | |
1910 | } | |
1911 | catch(const PDNSException& e) { | |
e6a9dde5 | 1912 | g_log<<Logger::Error<<"Error closing TCP socket after an overflow drop: "<<e.reason<<endl; |
a7b68ae7 | 1913 | } |
09e6702a BH |
1914 | return; |
1915 | } | |
3ddb9247 | 1916 | |
3897b9e1 | 1917 | setNonBlocking(newsock); |
f26bf547 | 1918 | std::shared_ptr<TCPConnection> tc = std::make_shared<TCPConnection>(newsock, addr); |
cd989c87 | 1919 | tc->state=TCPConnection::BYTE0; |
3ddb9247 | 1920 | |
cd989c87 | 1921 | t_fdm->addReadFD(tc->getFD(), handleRunningTCPQuestion, tc); |
c038218b | 1922 | |
0bff046b | 1923 | struct timeval now; |
c038218b | 1924 | Utility::gettimeofday(&now, 0); |
cd989c87 | 1925 | t_fdm->setReadTTD(tc->getFD(), now, g_tcpTimeout); |
09e6702a BH |
1926 | } |
1927 | } | |
3ddb9247 | 1928 | |
d187038c | 1929 | static string* doProcessUDPQuestion(const std::string& question, const ComboAddress& fromaddr, const ComboAddress& destaddr, struct timeval tv, int fd) |
1bc3c142 | 1930 | { |
183eb877 | 1931 | gettimeofday(&g_now, 0); |
b71b60ee | 1932 | struct timeval diff = g_now - tv; |
1933 | double delta=(diff.tv_sec*1000 + diff.tv_usec/1000.0); | |
183eb877 | 1934 | |
22cf1fda | 1935 | if(tv.tv_sec && delta > 1000.0) { |
b71b60ee | 1936 | g_stats.tooOldDrops++; |
1937 | return 0; | |
1938 | } | |
1939 | ||
1bc3c142 | 1940 | ++g_stats.qcounter; |
d7f10541 BH |
1941 | if(fromaddr.sin4.sin_family==AF_INET6) |
1942 | g_stats.ipv6qcounter++; | |
1bc3c142 BH |
1943 | |
1944 | string response; | |
93f0da94 | 1945 | const struct dnsheader* dh = (struct dnsheader*)question.c_str(); |
49a3500d | 1946 | unsigned int ctag=0; |
f57486f1 | 1947 | uint32_t qhash = 0; |
12aff2e5 | 1948 | bool needECS = false; |
5cc8371b | 1949 | bool needXPF = g_XPFAcl.match(fromaddr); |
02b47f43 | 1950 | std::vector<std::string> policyTags; |
5fd2577f | 1951 | LuaContext::LuaObject data; |
5cc8371b RG |
1952 | ComboAddress source = fromaddr; |
1953 | ComboAddress destination = destaddr; | |
67e31ebe | 1954 | string requestorId; |
590388d2 | 1955 | string deviceId; |
16bbc6e3 | 1956 | bool logQuery = false; |
12aff2e5 | 1957 | #ifdef HAVE_PROTOBUF |
02b47f43 | 1958 | boost::uuids::uuid uniqueId; |
02b47f43 | 1959 | auto luaconfsLocal = g_luaconfs.getLocal(); |
63341e8d | 1960 | if (checkProtobufExport(luaconfsLocal)) { |
4898a348 | 1961 | uniqueId = (*t_uuidGenerator)(); |
02b47f43 | 1962 | needECS = true; |
63341e8d | 1963 | } else if (checkOutgoingProtobufExport(luaconfsLocal)) { |
02b47f43 RG |
1964 | uniqueId = (*t_uuidGenerator)(); |
1965 | } | |
16bbc6e3 | 1966 | logQuery = t_protobufServer && luaconfsLocal->protobufExportConfig.logQueries; |
f1c7929a | 1967 | bool logResponse = t_protobufServer && luaconfsLocal->protobufExportConfig.logResponses; |
12aff2e5 | 1968 | #endif |
b40562da RG |
1969 | EDNSSubnetOpts ednssubnet; |
1970 | bool ecsFound = false; | |
1971 | bool ecsParsed = false; | |
70fb28d9 RG |
1972 | uint32_t ttlCap = std::numeric_limits<uint32_t>::max(); |
1973 | bool variable = false; | |
1bc3c142 | 1974 | try { |
02b47f43 RG |
1975 | DNSName qname; |
1976 | uint16_t qtype=0; | |
1977 | uint16_t qclass=0; | |
1bc3c142 | 1978 | uint32_t age; |
c15ff3df | 1979 | bool qnameParsed=false; |
8f7473d7 | 1980 | #ifdef MALLOC_TRACE |
1981 | /* | |
1982 | static uint64_t last=0; | |
1983 | if(!last) | |
1984 | g_mtracer->clearAllocators(); | |
1985 | cout<<g_mtracer->getAllocs()-last<<" "<<g_mtracer->getNumOut()<<" -- BEGIN TRACE"<<endl; | |
1986 | last=g_mtracer->getAllocs(); | |
1987 | cout<<g_mtracer->topAllocatorsString()<<endl; | |
1988 | g_mtracer->clearAllocators(); | |
1989 | */ | |
1990 | #endif | |
55a1378f | 1991 | |
70fb28d9 | 1992 | if(needECS || needXPF || (t_pdl && (t_pdl->d_gettag || t_pdl->d_gettag_ffi))) { |
b2eacd67 | 1993 | try { |
29e6303a | 1994 | EDNSOptionViewMap ednsOptions; |
5cc8371b RG |
1995 | bool xpfFound = false; |
1996 | ||
1997 | ecsFound = false; | |
1998 | ||
1999 | getQNameAndSubnet(question, &qname, &qtype, &qclass, | |
2000 | ecsFound, &ednssubnet, g_gettagNeedsEDNSOptions ? &ednsOptions : nullptr, | |
2001 | xpfFound, needXPF ? &source : nullptr, needXPF ? &destination : nullptr); | |
2002 | ||
c15ff3df RG |
2003 | qnameParsed = true; |
2004 | ecsParsed = true; | |
12aff2e5 | 2005 | |
70fb28d9 | 2006 | if(t_pdl) { |
12aff2e5 | 2007 | try { |
70fb28d9 | 2008 | if (t_pdl->d_gettag_ffi) { |
f1c7929a | 2009 | ctag = t_pdl->gettag_ffi(source, ednssubnet.source, destination, qname, qtype, &policyTags, data, ednsOptions, false, requestorId, deviceId, ttlCap, variable, logQuery); |
70fb28d9 RG |
2010 | } |
2011 | else if (t_pdl->d_gettag) { | |
2012 | ctag = t_pdl->gettag(source, ednssubnet.source, destination, qname, qtype, &policyTags, data, ednsOptions, false, requestorId, deviceId); | |
2013 | } | |
12aff2e5 | 2014 | } |
70fb28d9 | 2015 | catch(const std::exception& e) { |
12aff2e5 | 2016 | if(g_logCommonErrors) |
e6a9dde5 | 2017 | g_log<<Logger::Warning<<"Error parsing a query packet qname='"<<qname<<"' for tag determination, setting tag=0: "<<e.what()<<endl; |
12aff2e5 | 2018 | } |
8ea8c302 | 2019 | } |
b2eacd67 | 2020 | } |
70fb28d9 | 2021 | catch(const std::exception& e) |
b2eacd67 | 2022 | { |
2023 | if(g_logCommonErrors) | |
e6a9dde5 | 2024 | g_log<<Logger::Warning<<"Error parsing a query packet for tag determination, setting tag=0: "<<e.what()<<endl; |
12aff2e5 | 2025 | } |
12ce523e | 2026 | } |
3ddb9247 | 2027 | |
02b47f43 | 2028 | bool cacheHit = false; |
1fbc6dc5 | 2029 | boost::optional<RecProtoBufMessage> pbMessage(boost::none); |
02b47f43 | 2030 | #ifdef HAVE_PROTOBUF |
63341e8d | 2031 | if(t_protobufServer) { |
d362f7c1 | 2032 | pbMessage = RecProtoBufMessage(DNSProtoBufMessage::DNSProtoBufMessageType::Response); |
845cbf4c | 2033 | if (logQuery && !(luaconfsLocal->protobufExportConfig.taggedOnly && policyTags.empty())) { |
63341e8d | 2034 | protobufLogQuery(t_protobufServer, luaconfsLocal->protobufMaskV4, luaconfsLocal->protobufMaskV6, uniqueId, source, destination, ednssubnet.source, false, dh->id, question.size(), qname, qtype, qclass, policyTags, requestorId, deviceId); |
b790ef3d | 2035 | } |
d9d3f9c1 RG |
2036 | } |
2037 | #endif /* HAVE_PROTOBUF */ | |
02b47f43 | 2038 | |
70fb28d9 RG |
2039 | /* It might seem like a good idea to skip the packet cache lookup if we know that the answer is not cacheable, |
2040 | but it means that the hash would not be computed. If some script decides at a later time to mark back the answer | |
2041 | as cacheable we would cache it with a wrong tag, so better safe than sorry. */ | |
8467ec26 | 2042 | vState valState; |
c15ff3df | 2043 | if (qnameParsed) { |
8467ec26 | 2044 | cacheHit = (!SyncRes::s_nopacketcache && t_packetCache->getResponsePacket(ctag, question, qname, qtype, qclass, g_now.tv_sec, &response, &age, &valState, &qhash, pbMessage ? &(*pbMessage) : nullptr)); |
c15ff3df RG |
2045 | } |
2046 | else { | |
8467ec26 | 2047 | cacheHit = (!SyncRes::s_nopacketcache && t_packetCache->getResponsePacket(ctag, question, qname, &qtype, &qclass, g_now.tv_sec, &response, &age, &valState, &qhash, pbMessage ? &(*pbMessage) : nullptr)); |
c15ff3df RG |
2048 | } |
2049 | ||
d9d3f9c1 | 2050 | if (cacheHit) { |
8467ec26 KM |
2051 | if(valState == Bogus) { |
2052 | if(t_bogusremotes) | |
2053 | t_bogusremotes->push_back(source); | |
2054 | if(t_bogusqueryring) | |
2055 | t_bogusqueryring->push_back(make_pair(qname, qtype)); | |
2056 | } | |
2057 | ||
d9d3f9c1 | 2058 | #ifdef HAVE_PROTOBUF |
845cbf4c | 2059 | if(t_protobufServer && logResponse && !(luaconfsLocal->protobufExportConfig.taggedOnly && pbMessage->getAppliedPolicy().empty() && pbMessage->getPolicyTags().empty())) { |
5cc8371b | 2060 | Netmask requestorNM(source, source.sin4.sin_family == AF_INET ? luaconfsLocal->protobufMaskV4 : luaconfsLocal->protobufMaskV6); |
e1c8a4bb | 2061 | const ComboAddress& requestor = requestorNM.getMaskedNetwork(); |
d362f7c1 RG |
2062 | pbMessage->update(uniqueId, &requestor, &destination, false, dh->id); |
2063 | pbMessage->setEDNSSubnet(ednssubnet.source, ednssubnet.source.isIpv4() ? luaconfsLocal->protobufMaskV4 : luaconfsLocal->protobufMaskV6); | |
2064 | pbMessage->setQueryTime(g_now.tv_sec, g_now.tv_usec); | |
2065 | pbMessage->setRequestorId(requestorId); | |
2066 | pbMessage->setDeviceId(deviceId); | |
63341e8d | 2067 | protobufLogResponse(t_protobufServer, *pbMessage); |
02b47f43 | 2068 | } |
d9d3f9c1 | 2069 | #endif /* HAVE_PROTOBUF */ |
49a3500d | 2070 | if(!g_quiet) |
e6a9dde5 | 2071 | g_log<<Logger::Notice<<t_id<< " question answered from packet cache tag="<<ctag<<" from "<<source.toStringWithPort()<<(source != fromaddr ? " (via "+fromaddr.toStringWithPort()+")" : "")<<endl; |
8f7473d7 | 2072 | |
1bc3c142 BH |
2073 | g_stats.packetCacheHits++; |
2074 | SyncRes::s_queries++; | |
2075 | ageDNSPacket(response, age); | |
b71b60ee | 2076 | struct msghdr msgh; |
2077 | struct iovec iov; | |
2078 | char cbuf[256]; | |
2079 | fillMSGHdr(&msgh, &iov, cbuf, 0, (char*)response.c_str(), response.length(), const_cast<ComboAddress*>(&fromaddr)); | |
2c0af54f PD |
2080 | msgh.msg_control=NULL; |
2081 | ||
cbc03320 | 2082 | if(g_fromtosockets.count(fd)) { |
fbe2a2e0 | 2083 | addCMsgSrcAddr(&msgh, cbuf, &destaddr, 0); |
b71b60ee | 2084 | } |
cbc03320 | 2085 | if(sendmsg(fd, &msgh, 0) < 0 && g_logCommonErrors) |
e6a9dde5 | 2086 | g_log<<Logger::Warning<<"Sending UDP reply to client "<<source.toStringWithPort()<<(source != fromaddr ? " (via "+fromaddr.toStringWithPort()+")" : "")<<" failed with: "<<strerror(errno)<<endl; |
b71b60ee | 2087 | |
97bee66d | 2088 | if(response.length() >= sizeof(struct dnsheader)) { |
dd079764 RG |
2089 | struct dnsheader tmpdh; |
2090 | memcpy(&tmpdh, response.c_str(), sizeof(tmpdh)); | |
5cc8371b | 2091 | updateResponseStats(tmpdh.rcode, source, response.length(), 0, 0); |
97bee66d | 2092 | } |
08f3f638 | 2093 | g_stats.avgLatencyUsec=(1-1.0/g_latencyStatSize)*g_stats.avgLatencyUsec + 0.0; // we assume 0 usec |
19178da9 | 2094 | g_stats.avgLatencyOursUsec=(1-1.0/g_latencyStatSize)*g_stats.avgLatencyOursUsec + 0.0; // we assume 0 usec |
1bc3c142 BH |
2095 | return 0; |
2096 | } | |
3ddb9247 | 2097 | } |
1bc3c142 | 2098 | catch(std::exception& e) { |
e6a9dde5 | 2099 | g_log<<Logger::Error<<"Error processing or aging answer packet: "<<e.what()<<endl; |
1bc3c142 BH |
2100 | return 0; |
2101 | } | |
3ddb9247 | 2102 | |
f26bf547 | 2103 | if(t_pdl) { |
5cc8371b | 2104 | if(t_pdl->ipfilter(source, destination, *dh)) { |
4ea94941 | 2105 | if(!g_quiet) |
e6a9dde5 | 2106 | g_log<<Logger::Notice<<t_id<<" ["<<MT->getTid()<<"/"<<MT->numProcesses()<<"] DROPPED question from "<<source.toStringWithPort()<<(source != fromaddr ? " (via "+fromaddr.toStringWithPort()+")" : "")<<" based on policy"<<endl; |
4ea94941 | 2107 | g_stats.policyDrops++; |
2108 | return 0; | |
2109 | } | |
2110 | } | |
2111 | ||
1bc3c142 | 2112 | if(MT->numProcesses() > g_maxMThreads) { |
461df9d2 | 2113 | if(!g_quiet) |
e6a9dde5 | 2114 | g_log<<Logger::Notice<<t_id<<" ["<<MT->getTid()<<"/"<<MT->numProcesses()<<"] DROPPED question from "<<source.toStringWithPort()<<(source != fromaddr ? " (via "+fromaddr.toStringWithPort()+")" : "")<<", over capacity"<<endl; |
461df9d2 | 2115 | |
1bc3c142 BH |
2116 | g_stats.overCapacityDrops++; |
2117 | return 0; | |
2118 | } | |
3ddb9247 | 2119 | |
5164bac3 | 2120 | DNSComboWriter* dc = new DNSComboWriter(question, g_now, std::move(policyTags), std::move(data)); |
1bc3c142 | 2121 | dc->setSocket(fd); |
49a3500d | 2122 | dc->d_tag=ctag; |
e9f63d47 | 2123 | dc->d_qhash=qhash; |
5cc8371b RG |
2124 | dc->setRemote(fromaddr); |
2125 | dc->setSource(source); | |
b71b60ee | 2126 | dc->setLocal(destaddr); |
5cc8371b | 2127 | dc->setDestination(destination); |
1bc3c142 | 2128 | dc->d_tcp=false; |
b40562da RG |
2129 | dc->d_ecsFound = ecsFound; |
2130 | dc->d_ecsParsed = ecsParsed; | |
2131 | dc->d_ednssubnet = ednssubnet; | |
70fb28d9 RG |
2132 | dc->d_ttlCap = ttlCap; |
2133 | dc->d_variable = variable; | |
aa7929a3 | 2134 | #ifdef HAVE_PROTOBUF |
63341e8d | 2135 | if (t_protobufServer || t_outgoingProtobufServer) { |
5164bac3 | 2136 | dc->d_uuid = std::move(uniqueId); |
d9d3f9c1 | 2137 | } |
67e31ebe | 2138 | dc->d_requestorId = requestorId; |
590388d2 | 2139 | dc->d_deviceId = deviceId; |
aa7929a3 RG |
2140 | #endif |
2141 | ||
1bc3c142 BH |
2142 | MT->makeThread(startDoResolve, (void*) dc); // deletes dc |
2143 | return 0; | |
3ddb9247 PD |
2144 | } |
2145 | ||
b71b60ee | 2146 | |
d187038c | 2147 | static void handleNewUDPQuestion(int fd, FDMultiplexer::funcparam_t& var) |
5db529f8 | 2148 | { |
a683e8bd | 2149 | ssize_t len; |
12c2f2b9 | 2150 | static const size_t maxIncomingQuerySize = 512; |
04896b99 | 2151 | static thread_local std::string data; |
5db529f8 | 2152 | ComboAddress fromaddr; |
b71b60ee | 2153 | struct msghdr msgh; |
2154 | struct iovec iov; | |
2155 | char cbuf[256]; | |
390f1dab | 2156 | bool firstQuery = true; |
b71b60ee | 2157 | |
c0a00acd RG |
2158 | for(size_t queriesCounter = 0; queriesCounter < s_maxUDPQueriesPerRound; queriesCounter++) { |
2159 | data.resize(maxIncomingQuerySize); | |
2160 | fromaddr.sin6.sin6_family=AF_INET6; // this makes sure fromaddr is big enough | |
2161 | fillMSGHdr(&msgh, &iov, cbuf, sizeof(cbuf), &data[0], data.size(), &fromaddr); | |
b71b60ee | 2162 | |
c0a00acd | 2163 | if((len=recvmsg(fd, &msgh, 0)) >= 0) { |
390f1dab | 2164 | |
c0a00acd | 2165 | firstQuery = false; |
390f1dab | 2166 | |
c0a00acd RG |
2167 | if (static_cast<size_t>(len) < sizeof(dnsheader)) { |
2168 | g_stats.ignoredCount++; | |
2169 | if (!g_quiet) { | |
2170 | g_log<<Logger::Error<<"Ignoring too-short ("<<std::to_string(len)<<") query from "<<fromaddr.toString()<<endl; | |
2171 | } | |
2172 | return; | |
04896b99 | 2173 | } |
04896b99 | 2174 | |
c0a00acd RG |
2175 | if (msgh.msg_flags & MSG_TRUNC) { |
2176 | g_stats.truncatedDrops++; | |
2177 | if (!g_quiet) { | |
2178 | g_log<<Logger::Error<<"Ignoring truncated query from "<<fromaddr.toString()<<endl; | |
2179 | } | |
2180 | return; | |
ba892c7f | 2181 | } |
b23b8614 | 2182 | |
c0a00acd RG |
2183 | if(t_remotes) { |
2184 | t_remotes->push_back(fromaddr); | |
2185 | } | |
81859ba5 | 2186 | |
c0a00acd RG |
2187 | if(t_allowFrom && !t_allowFrom->match(&fromaddr)) { |
2188 | if(!g_quiet) { | |
2189 | g_log<<Logger::Error<<"["<<MT->getTid()<<"] dropping UDP query from "<<fromaddr.toString()<<", address not matched by allow-from"<<endl; | |
2190 | } | |
3ddb9247 | 2191 | |
c0a00acd RG |
2192 | g_stats.unauthorizedUDP++; |
2193 | return; | |
5db529f8 | 2194 | } |
c0a00acd RG |
2195 | BOOST_STATIC_ASSERT(offsetof(sockaddr_in, sin_port) == offsetof(sockaddr_in6, sin6_port)); |
2196 | if(!fromaddr.sin4.sin_port) { // also works for IPv6 | |
2197 | if(!g_quiet) { | |
2198 | g_log<<Logger::Error<<"["<<MT->getTid()<<"] dropping UDP query from "<<fromaddr.toStringWithPort()<<", can't deal with port 0"<<endl; | |
2199 | } | |
2200 | ||
2201 | g_stats.clientParseError++; // not quite the best place to put it, but needs to go somewhere | |
2202 | return; | |
3abcdab2 | 2203 | } |
c0a00acd RG |
2204 | |
2205 | try { | |
2206 | data.resize(static_cast<size_t>(len)); | |
2207 | dnsheader* dh=(dnsheader*)&data[0]; | |
2208 | ||
2209 | if(dh->qr) { | |
2210 | g_stats.ignoredCount++; | |
2211 | if(g_logCommonErrors) { | |
2212 | g_log<<Logger::Error<<"Ignoring answer from "<<fromaddr.toString()<<" on server socket!"<<endl; | |
2213 | } | |
2214 | } | |
2215 | else if(dh->opcode) { | |
2216 | g_stats.ignoredCount++; | |
2217 | if(g_logCommonErrors) { | |
2218 | g_log<<Logger::Error<<"Ignoring non-query opcode "<<dh->opcode<<" from "<<fromaddr.toString()<<" on server socket!"<<endl; | |
2219 | } | |
a6147cd2 | 2220 | } |
c0f9be19 RG |
2221 | else if (dh->qdcount == 0) { |
2222 | g_stats.emptyQueriesCount++; | |
2223 | if(g_logCommonErrors) { | |
2224 | g_log<<Logger::Error<<"Ignoring empty (qdcount == 0) query from "<<fromaddr.toString()<<" on server socket!"<<endl; | |
2225 | } | |
2226 | } | |
a6147cd2 | 2227 | else { |
c0a00acd RG |
2228 | struct timeval tv={0,0}; |
2229 | HarvestTimestamp(&msgh, &tv); | |
2230 | ComboAddress dest; | |
2231 | dest.reset(); // this makes sure we ignore this address if not returned by recvmsg above | |
2232 | auto loc = rplookup(g_listenSocketsAddresses, fd); | |
2233 | if(HarvestDestinationAddress(&msgh, &dest)) { | |
2234 | // but.. need to get port too | |
2235 | if(loc) { | |
2236 | dest.sin4.sin_port = loc->sin4.sin_port; | |
2237 | } | |
a6147cd2 | 2238 | } |
2239 | else { | |
c0a00acd RG |
2240 | if(loc) { |
2241 | dest = *loc; | |
2242 | } | |
2243 | else { | |
2244 | dest.sin4.sin_family = fromaddr.sin4.sin_family; | |
2245 | socklen_t slen = dest.getSocklen(); | |
2246 | getsockname(fd, (sockaddr*)&dest, &slen); // if this fails, we're ok with it | |
2247 | } | |
2248 | } | |
2249 | ||
2250 | if(g_weDistributeQueries) { | |
2251 | distributeAsyncFunction(data, boost::bind(doProcessUDPQuestion, data, fromaddr, dest, tv, fd)); | |
2252 | } | |
2253 | else { | |
2254 | doProcessUDPQuestion(data, fromaddr, dest, tv, fd); | |
a6147cd2 | 2255 | } |
2256 | } | |
c0a00acd RG |
2257 | } |
2258 | catch(const MOADNSException& mde) { | |
2259 | g_stats.clientParseError++; | |
2260 | if(g_logCommonErrors) { | |
2261 | g_log<<Logger::Error<<"Unable to parse packet from remote UDP client "<<fromaddr.toString() <<": "<<mde.what()<<endl; | |
2262 | } | |
2263 | } | |
2264 | catch(const std::runtime_error& e) { | |
2265 | g_stats.clientParseError++; | |
2266 | if(g_logCommonErrors) { | |
2267 | g_log<<Logger::Error<<"Unable to parse packet from remote UDP client "<<fromaddr.toString() <<": "<<e.what()<<endl; | |
2268 | } | |
5db529f8 BH |
2269 | } |
2270 | } | |
c0a00acd RG |
2271 | else { |
2272 | // cerr<<t_id<<" had error: "<<stringerror()<<endl; | |
2273 | if(firstQuery && errno == EAGAIN) { | |
2274 | g_stats.noPacketError++; | |
2275 | } | |
390f1dab | 2276 | |
c0a00acd RG |
2277 | break; |
2278 | } | |
ac0e821b | 2279 | } |
5db529f8 BH |
2280 | } |
2281 | ||
adb6cd72 | 2282 | static void makeTCPServerSockets(deferredAdd_t& deferredAdds, std::set<int>& tcpSockets) |
9c495589 | 2283 | { |
37d3f960 | 2284 | int fd; |
f28307ad | 2285 | vector<string>locals; |
2e3d8a19 | 2286 | stringtok(locals,::arg()["local-address"]," ,"); |
9c495589 | 2287 | |
f28307ad | 2288 | if(locals.empty()) |
3f81d239 | 2289 | throw PDNSException("No local address specified"); |
3ddb9247 | 2290 | |
f28307ad | 2291 | for(vector<string>::const_iterator i=locals.begin();i!=locals.end();++i) { |
32252594 BH |
2292 | ServiceTuple st; |
2293 | st.port=::arg().asNum("local-port"); | |
2294 | parseService(*i, st); | |
3ddb9247 | 2295 | |
32252594 BH |
2296 | ComboAddress sin; |
2297 | ||
d38e2ba9 | 2298 | sin.reset(); |
37d3f960 | 2299 | sin.sin4.sin_family = AF_INET; |
32252594 | 2300 | if(!IpToU32(st.host, (uint32_t*)&sin.sin4.sin_addr.s_addr)) { |
37d3f960 | 2301 | sin.sin6.sin6_family = AF_INET6; |
f71bc087 | 2302 | if(makeIPv6sockaddr(st.host, &sin.sin6) < 0) |
3ddb9247 | 2303 | throw PDNSException("Unable to resolve local address for TCP server on '"+ st.host +"'"); |
37d3f960 BH |
2304 | } |
2305 | ||
2306 | fd=socket(sin.sin6.sin6_family, SOCK_STREAM, 0); | |
3ddb9247 | 2307 | if(fd<0) |
3f81d239 | 2308 | throw PDNSException("Making a TCP server socket for resolver: "+stringerror()); |
f28307ad | 2309 | |
3897b9e1 | 2310 | setCloseOnExec(fd); |
a903b39c | 2311 | |
f28307ad | 2312 | int tmp=1; |
810ff705 | 2313 | if(setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof tmp)<0) { |
e6a9dde5 | 2314 | g_log<<Logger::Error<<"Setsockopt failed for TCP listening socket"<<endl; |
c8ddb7c2 | 2315 | exit(1); |
f28307ad | 2316 | } |
0dfa94ab | 2317 | if(sin.sin6.sin6_family == AF_INET6 && setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &tmp, sizeof(tmp)) < 0) { |
e6a9dde5 | 2318 | g_log<<Logger::Error<<"Failed to set IPv6 socket to IPv6 only, continuing anyhow: "<<strerror(errno)<<endl; |
0dfa94ab | 2319 | } |
2320 | ||
c8ddb7c2 | 2321 | #ifdef TCP_DEFER_ACCEPT |
38ac0821 | 2322 | if(setsockopt(fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &tmp, sizeof tmp) >= 0) { |
37d3f960 | 2323 | if(i==locals.begin()) |
e6a9dde5 | 2324 | g_log<<Logger::Error<<"Enabled TCP data-ready filter for (slight) DoS protection"<<endl; |
c8ddb7c2 BH |
2325 | } |
2326 | #endif | |
2327 | ||
fec7dd5a SS |
2328 | if( ::arg().mustDo("non-local-bind") ) |
2329 | Utility::setBindAny(AF_INET, fd); | |
2330 | ||
2332f42d | 2331 | #ifdef SO_REUSEPORT |
810ff705 RG |
2332 | if(g_reusePort) { |
2333 | if(setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &tmp, sizeof(tmp)) < 0) | |
2332f42d | 2334 | throw PDNSException("SO_REUSEPORT: "+stringerror()); |
2335 | } | |
2336 | #endif | |
2337 | ||
0735b17e RG |
2338 | if (::arg().asNum("tcp-fast-open") > 0) { |
2339 | #ifdef TCP_FASTOPEN | |
2340 | int fastOpenQueueSize = ::arg().asNum("tcp-fast-open"); | |
2341 | if (setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &fastOpenQueueSize, sizeof fastOpenQueueSize) < 0) { | |
e6a9dde5 | 2342 | g_log<<Logger::Error<<"Failed to enable TCP Fast Open for listening socket: "<<strerror(errno)<<endl; |
0735b17e RG |
2343 | } |
2344 | #else | |
e6a9dde5 | 2345 | g_log<<Logger::Warning<<"TCP Fast Open configured but not supported for listening socket"<<endl; |
0735b17e RG |
2346 | #endif |
2347 | } | |
2348 | ||
32252594 | 2349 | sin.sin4.sin_port = htons(st.port); |
a683e8bd | 2350 | socklen_t socklen=sin.sin4.sin_family==AF_INET ? sizeof(sin.sin4) : sizeof(sin.sin6); |
3ddb9247 | 2351 | if (::bind(fd, (struct sockaddr *)&sin, socklen )<0) |
3f81d239 | 2352 | throw PDNSException("Binding TCP server socket for "+ st.host +": "+stringerror()); |
3ddb9247 | 2353 | |
3897b9e1 | 2354 | setNonBlocking(fd); |
49a699c4 | 2355 | setSocketSendBuffer(fd, 65000); |
37d3f960 | 2356 | listen(fd, 128); |
b243ca3b | 2357 | deferredAdds.push_back(make_pair(fd, handleNewTCPQuestion)); |
adb6cd72 RG |
2358 | tcpSockets.insert(fd); |
2359 | ||
84433b79 | 2360 | // we don't need to update g_listenSocketsAddresses since it doesn't work for TCP/IP: |
2361 | // - fd is not that which we know here, but returned from accept() | |
3ddb9247 | 2362 | if(sin.sin4.sin_family == AF_INET) |
e6a9dde5 | 2363 | g_log<<Logger::Error<<"Listening for TCP queries on "<< sin.toString() <<":"<<st.port<<endl; |
aa136564 | 2364 | else |
e6a9dde5 | 2365 | g_log<<Logger::Error<<"Listening for TCP queries on ["<< sin.toString() <<"]:"<<st.port<<endl; |
f28307ad | 2366 | } |
9c495589 BH |
2367 | } |
2368 | ||
b243ca3b | 2369 | static void makeUDPServerSockets(deferredAdd_t& deferredAdds) |
288f4aa9 | 2370 | { |
fec7dd5a | 2371 | int one=1; |
f28307ad | 2372 | vector<string>locals; |
2e3d8a19 | 2373 | stringtok(locals,::arg()["local-address"]," ,"); |
288f4aa9 | 2374 | |
f28307ad | 2375 | if(locals.empty()) |
3f81d239 | 2376 | throw PDNSException("No local address specified"); |
3ddb9247 | 2377 | |
f28307ad | 2378 | for(vector<string>::const_iterator i=locals.begin();i!=locals.end();++i) { |
32252594 BH |
2379 | ServiceTuple st; |
2380 | st.port=::arg().asNum("local-port"); | |
2381 | parseService(*i, st); | |
2382 | ||
37d3f960 | 2383 | ComboAddress sin; |
996c89cc | 2384 | |
d38e2ba9 | 2385 | sin.reset(); |
37d3f960 | 2386 | sin.sin4.sin_family = AF_INET; |
32252594 | 2387 | if(!IpToU32(st.host.c_str() , (uint32_t*)&sin.sin4.sin_addr.s_addr)) { |
37d3f960 | 2388 | sin.sin6.sin6_family = AF_INET6; |
f71bc087 | 2389 | if(makeIPv6sockaddr(st.host, &sin.sin6) < 0) |
3ddb9247 | 2390 | throw PDNSException("Unable to resolve local address for UDP server on '"+ st.host +"'"); |
37d3f960 | 2391 | } |
3ddb9247 | 2392 | |
bb4bdbaf | 2393 | int fd=socket(sin.sin4.sin_family, SOCK_DGRAM, 0); |
d3b4137e | 2394 | if(fd < 0) { |
3f81d239 | 2395 | throw PDNSException("Making a UDP server socket for resolver: "+netstringerror()); |
d3b4137e | 2396 | } |
915b0c39 | 2397 | if (!setSocketTimestamps(fd)) |
e6a9dde5 | 2398 | g_log<<Logger::Warning<<"Unable to enable timestamp reporting for socket"<<endl; |
0dfa94ab | 2399 | |
b71b60ee | 2400 | if(IsAnyAddress(sin)) { |
cbc03320 | 2401 | if(sin.sin4.sin_family == AF_INET) |
2402 | if(!setsockopt(fd, IPPROTO_IP, GEN_IP_PKTINFO, &one, sizeof(one))) // linux supports this, so why not - might fail on other systems | |
2403 | g_fromtosockets.insert(fd); | |
757d3179 | 2404 | #ifdef IPV6_RECVPKTINFO |
cbc03320 | 2405 | if(sin.sin4.sin_family == AF_INET6) |
2406 | if(!setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one))) | |
2407 | g_fromtosockets.insert(fd); | |
757d3179 | 2408 | #endif |
0dfa94ab | 2409 | if(sin.sin6.sin6_family == AF_INET6 && setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one)) < 0) { |
e6a9dde5 | 2410 | g_log<<Logger::Error<<"Failed to set IPv6 socket to IPv6 only, continuing anyhow: "<<strerror(errno)<<endl; |
0dfa94ab | 2411 | } |
b71b60ee | 2412 | } |
fec7dd5a SS |
2413 | if( ::arg().mustDo("non-local-bind") ) |
2414 | Utility::setBindAny(AF_INET6, fd); | |
2415 | ||
3897b9e1 | 2416 | setCloseOnExec(fd); |
a903b39c | 2417 | |
4e9a20e6 | 2418 | setSocketReceiveBuffer(fd, 250000); |
32252594 | 2419 | sin.sin4.sin_port = htons(st.port); |
37d3f960 | 2420 | |
2332f42d | 2421 | |
2573d4a6 | 2422 | #ifdef SO_REUSEPORT |
810ff705 | 2423 | if(g_reusePort) { |
2332f42d | 2424 | if(setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one)) < 0) |
2425 | throw PDNSException("SO_REUSEPORT: "+stringerror()); | |
2426 | } | |
2427 | #endif | |
a683e8bd | 2428 | socklen_t socklen=sin.getSocklen(); |
3ddb9247 | 2429 | if (::bind(fd, (struct sockaddr *)&sin, socklen)<0) |
335da0ba | 2430 | throw PDNSException("Resolver binding to server socket on port "+ std::to_string(st.port) +" for "+ st.host+": "+stringerror()); |
3ddb9247 | 2431 | |
3897b9e1 | 2432 | setNonBlocking(fd); |
c2136bf0 | 2433 | |
b243ca3b | 2434 | deferredAdds.push_back(make_pair(fd, handleNewUDPQuestion)); |
40a3dd64 | 2435 | g_listenSocketsAddresses[fd]=sin; // this is written to only from the startup thread, not from the workers |
3ddb9247 | 2436 | if(sin.sin4.sin_family == AF_INET) |
e6a9dde5 | 2437 | g_log<<Logger::Error<<"Listening for UDP queries on "<< sin.toString() <<":"<<st.port<<endl; |
aa136564 | 2438 | else |
e6a9dde5 | 2439 | g_log<<Logger::Error<<"Listening for UDP queries on ["<< sin.toString() <<"]:"<<st.port<<endl; |
f28307ad | 2440 | } |
c836dc19 | 2441 | } |
caa6eefa | 2442 | |
d187038c | 2443 | static void daemonize(void) |
c836dc19 BH |
2444 | { |
2445 | if(fork()) | |
2446 | exit(0); // bye bye | |
3ddb9247 PD |
2447 | |
2448 | setsid(); | |
c836dc19 | 2449 | |
27a5ead5 | 2450 | int i=open("/dev/null",O_RDWR); /* open stdin */ |
3ddb9247 | 2451 | if(i < 0) |
e6a9dde5 | 2452 | g_log<<Logger::Critical<<"Unable to open /dev/null: "<<stringerror()<<endl; |
27a5ead5 BH |
2453 | else { |
2454 | dup2(i,0); /* stdin */ | |
2455 | dup2(i,1); /* stderr */ | |
2456 | dup2(i,2); /* stderr */ | |
2457 | close(i); | |
2458 | } | |
288f4aa9 | 2459 | } |
caa6eefa | 2460 | |
d187038c | 2461 | static void usr1Handler(int) |
c75a6a9e BH |
2462 | { |
2463 | statsWanted=true; | |
2464 | } | |
ae1b2e98 | 2465 | |
d187038c | 2466 | static void usr2Handler(int) |
9170fbaf | 2467 | { |
f1f34cc2 | 2468 | g_quiet= !g_quiet; |
2469 | SyncRes::setDefaultLogMode(g_quiet ? SyncRes::LogNone : SyncRes::Log); | |
2470 | ::arg().set("quiet")=g_quiet ? "" : "no"; | |
9170fbaf BH |
2471 | } |
2472 | ||
d187038c | 2473 | static void doStats(void) |
c75a6a9e | 2474 | { |
16beeaa4 BH |
2475 | static time_t lastOutputTime; |
2476 | static uint64_t lastQueryCount; | |
d299d4f5 | 2477 | |
2478 | uint64_t cacheHits = broadcastAccFunction<uint64_t>(pleaseGetCacheHits); | |
2479 | uint64_t cacheMisses = broadcastAccFunction<uint64_t>(pleaseGetCacheMisses); | |
3ddb9247 | 2480 | |
d299d4f5 | 2481 | if(g_stats.qcounter && (cacheHits + cacheMisses) && SyncRes::s_queries && SyncRes::s_outqueries) { |
e6a9dde5 | 2482 | g_log<<Logger::Notice<<"stats: "<<g_stats.qcounter<<" questions, "<< |
3427fa8a BH |
2483 | broadcastAccFunction<uint64_t>(pleaseGetCacheSize)<< " cache entries, "<< |
2484 | broadcastAccFunction<uint64_t>(pleaseGetNegCacheSize)<<" negative entries, "<< | |
3ddb9247 PD |
2485 | (int)((cacheHits*100.0)/(cacheHits+cacheMisses))<<"% cache hits"<<endl; |
2486 | ||
e6a9dde5 | 2487 | g_log<<Logger::Notice<<"stats: throttle map: " |
3427fa8a | 2488 | << broadcastAccFunction<uint64_t>(pleaseGetThrottleSize) <<", ns speeds: " |
3ddb9247 | 2489 | << broadcastAccFunction<uint64_t>(pleaseGetNsSpeedsSize)<<endl; |
e6a9dde5 PL |
2490 | g_log<<Logger::Notice<<"stats: outpacket/query ratio "<<(int)(SyncRes::s_outqueries*100.0/SyncRes::s_queries)<<"%"; |
2491 | g_log<<Logger::Notice<<", "<<(int)(SyncRes::s_throttledqueries*100.0/(SyncRes::s_outqueries+SyncRes::s_throttledqueries))<<"% throttled, " | |
525b8a7c | 2492 | <<SyncRes::s_nodelegated<<" no-delegation drops"<<endl; |
e6a9dde5 | 2493 | g_log<<Logger::Notice<<"stats: "<<SyncRes::s_tcpoutqueries<<" outgoing tcp connections, "<< |
3427fa8a | 2494 | broadcastAccFunction<uint64_t>(pleaseGetConcurrentQueries)<<" queries running, "<<SyncRes::s_outgoingtimeouts<<" outgoing timeouts"<<endl; |
81883dcc | 2495 | |
e6a9dde5 | 2496 | //g_log<<Logger::Notice<<"stats: "<<g_stats.ednsPingMatches<<" ping matches, "<<g_stats.ednsPingMismatches<<" mismatches, "<< |
16beeaa4 | 2497 | //g_stats.noPingOutQueries<<" outqueries w/o ping, "<< g_stats.noEdnsOutQueries<<" w/o EDNS"<<endl; |
3ddb9247 | 2498 | |
e6a9dde5 | 2499 | g_log<<Logger::Notice<<"stats: " << broadcastAccFunction<uint64_t>(pleaseGetPacketCacheSize) << |
16beeaa4 | 2500 | " packet cache entries, "<<(int)(100.0*broadcastAccFunction<uint64_t>(pleaseGetPacketCacheHits)/SyncRes::s_queries) << "% packet cache hits"<<endl; |
3ddb9247 | 2501 | |
16beeaa4 BH |
2502 | time_t now = time(0); |
2503 | if(lastOutputTime && lastQueryCount && now != lastOutputTime) { | |
e6a9dde5 | 2504 | g_log<<Logger::Notice<<"stats: "<< (SyncRes::s_queries - lastQueryCount) / (now - lastOutputTime) <<" qps (average over "<< (now - lastOutputTime) << " seconds)"<<endl; |
16beeaa4 BH |
2505 | } |
2506 | lastOutputTime = now; | |
2507 | lastQueryCount = SyncRes::s_queries; | |
c75a6a9e | 2508 | } |
3ddb9247 | 2509 | else if(statsWanted) |
e6a9dde5 | 2510 | g_log<<Logger::Notice<<"stats: no stats yet!"<<endl; |
7becf07f | 2511 | |
c75a6a9e BH |
2512 | statsWanted=false; |
2513 | } | |
c836dc19 | 2514 | |
29f0b1ce | 2515 | static void houseKeeping(void *) |
c836dc19 | 2516 | { |
cb1523d1 | 2517 | static thread_local time_t last_rootupdate, last_prune, last_secpoll; |
3337c2f7 RG |
2518 | static thread_local int cleanCounter=0; |
2519 | static thread_local bool s_running; // houseKeeping can get suspended in secpoll, and be restarted, which makes us do duplicate work | |
cc59bce6 | 2520 | try { |
2521 | if(s_running) | |
2522 | return; | |
2523 | s_running=true; | |
3ddb9247 | 2524 | |
cc59bce6 | 2525 | struct timeval now; |
2526 | Utility::gettimeofday(&now, 0); | |
3ddb9247 PD |
2527 | |
2528 | if(now.tv_sec - last_prune > (time_t)(5 + t_id)) { | |
cc59bce6 | 2529 | DTime dt; |
2530 | dt.setTimeval(now); | |
a6f7f5fe | 2531 | t_RC->doPrune(g_maxCacheEntries / g_numThreads); // this function is local to a thread, so fine anyhow |
2532 | t_packetCache->doPruneTo(g_maxPacketCacheEntries / g_numWorkerThreads); | |
3ddb9247 | 2533 | |
a6f7f5fe | 2534 | SyncRes::pruneNegCache(g_maxCacheEntries / (g_numWorkerThreads * 10)); |
3ddb9247 | 2535 | |
cc59bce6 | 2536 | if(!((cleanCounter++)%40)) { // this is a full scan! |
2537 | time_t limit=now.tv_sec-300; | |
a712cb56 | 2538 | SyncRes::pruneNSSpeeds(limit); |
cc59bce6 | 2539 | } |
2540 | last_prune=time(0); | |
d67620e4 | 2541 | } |
3ddb9247 | 2542 | |
cc59bce6 | 2543 | if(now.tv_sec - last_rootupdate > 7200) { |
30ee601a | 2544 | int res = SyncRes::getRootNS(g_now, nullptr); |
7836f7b4 PL |
2545 | if (!res) |
2546 | last_rootupdate=now.tv_sec; | |
cc59bce6 | 2547 | } |
3ddb9247 | 2548 | |
b243ca3b | 2549 | if(isHandlerThread()) { |
3ddb9247 | 2550 | |
cc59bce6 | 2551 | if(now.tv_sec - last_secpoll >= 3600) { |
2552 | try { | |
2553 | doSecPoll(&last_secpoll); | |
2554 | } | |
581d4ea3 | 2555 | catch(std::exception& e) |
2556 | { | |
e6a9dde5 | 2557 | g_log<<Logger::Error<<"Exception while performing security poll: "<<e.what()<<endl; |
581d4ea3 | 2558 | } |
47e9b74f | 2559 | catch(PDNSException& e) |
2560 | { | |
e6a9dde5 | 2561 | g_log<<Logger::Error<<"Exception while performing security poll: "<<e.reason<<endl; |
47e9b74f | 2562 | } |
d0992a65 CH |
2563 | catch(ImmediateServFailException &e) |
2564 | { | |
e6a9dde5 | 2565 | g_log<<Logger::Error<<"Exception while performing security poll: "<<e.reason<<endl; |
d0992a65 | 2566 | } |
47e9b74f | 2567 | catch(...) |
2568 | { | |
e6a9dde5 | 2569 | g_log<<Logger::Error<<"Exception while performing security poll"<<endl; |
47e9b74f | 2570 | } |
18b73338 | 2571 | } |
d67620e4 | 2572 | } |
cc59bce6 | 2573 | s_running=false; |
d67620e4 | 2574 | } |
cc59bce6 | 2575 | catch(PDNSException& ae) |
2576 | { | |
2577 | s_running=false; | |
e6a9dde5 | 2578 | g_log<<Logger::Error<<"Fatal error in housekeeping thread: "<<ae.reason<<endl; |
cc59bce6 | 2579 | throw; |
2580 | } | |
779828c4 | 2581 | } |
d6d5dea7 | 2582 | |
d187038c | 2583 | static void makeThreadPipes() |
49a699c4 | 2584 | { |
b243ca3b RG |
2585 | /* thread 0 is the handler / SNMP, we start at 1 */ |
2586 | for(unsigned int n = 1; n <= (g_numWorkerThreads + g_numDistributorThreads); ++n) { | |
2587 | auto& threadInfos = s_threadInfos.at(n); | |
2588 | ||
49a699c4 BH |
2589 | int fd[2]; |
2590 | if(pipe(fd) < 0) | |
2591 | unixDie("Creating pipe for inter-thread communications"); | |
3ddb9247 | 2592 | |
b243ca3b RG |
2593 | threadInfos.pipes.readToThread = fd[0]; |
2594 | threadInfos.pipes.writeToThread = fd[1]; | |
3ddb9247 | 2595 | |
49a699c4 BH |
2596 | if(pipe(fd) < 0) |
2597 | unixDie("Creating pipe for inter-thread communications"); | |
b243ca3b RG |
2598 | |
2599 | threadInfos.pipes.readFromThread = fd[0]; | |
2600 | threadInfos.pipes.writeFromThread = fd[1]; | |
3ddb9247 | 2601 | |
cf8cda18 RG |
2602 | if(pipe(fd) < 0) |
2603 | unixDie("Creating pipe for inter-thread communications"); | |
d10307c5 | 2604 | |
b243ca3b RG |
2605 | threadInfos.pipes.readQueriesToThread = fd[0]; |
2606 | threadInfos.pipes.writeQueriesToThread = fd[1]; | |
2607 | ||
2608 | if (!setNonBlocking(threadInfos.pipes.writeQueriesToThread)) { | |
d10307c5 RG |
2609 | unixDie("Making pipe for inter-thread communications non-blocking"); |
2610 | } | |
49a699c4 BH |
2611 | } |
2612 | } | |
2613 | ||
00c9b8c1 BH |
2614 | struct ThreadMSG |
2615 | { | |
2616 | pipefunc_t func; | |
2617 | bool wantAnswer; | |
2618 | }; | |
2619 | ||
b4e76a18 | 2620 | void broadcastFunction(const pipefunc_t& func) |
49a699c4 | 2621 | { |
b243ca3b RG |
2622 | /* This function might be called by the worker with t_id 0 during startup |
2623 | for the initialization of ACLs and domain maps. After that it should only | |
2624 | be called by the handler. */ | |
d77abca1 | 2625 | |
b243ca3b RG |
2626 | if (s_threadInfos.empty() && isHandlerThread()) { |
2627 | /* the handler and distributors will call themselves below, but | |
2628 | during startup we get called while s_threadInfos has not been | |
2629 | populated yet to update the ACL or domain maps, so we need to | |
2630 | handle that case. | |
2631 | */ | |
2632 | func(); | |
2633 | } | |
b4e76a18 | 2634 | |
b243ca3b RG |
2635 | unsigned int n = 0; |
2636 | for (const auto& threadInfo : s_threadInfos) { | |
49a699c4 | 2637 | if(n++ == t_id) { |
b4e76a18 | 2638 | func(); // don't write to ourselves! |
49a699c4 BH |
2639 | continue; |
2640 | } | |
3ddb9247 | 2641 | |
00c9b8c1 BH |
2642 | ThreadMSG* tmsg = new ThreadMSG(); |
2643 | tmsg->func = func; | |
2644 | tmsg->wantAnswer = true; | |
b243ca3b | 2645 | if(write(threadInfo.pipes.writeToThread, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) { |
b841314c | 2646 | delete tmsg; |
b243ca3b | 2647 | |
49a699c4 | 2648 | unixDie("write to thread pipe returned wrong size or error"); |
b841314c | 2649 | } |
3ddb9247 | 2650 | |
49467864 | 2651 | string* resp = nullptr; |
b243ca3b | 2652 | if(read(threadInfo.pipes.readFromThread, &resp, sizeof(resp)) != sizeof(resp)) |
49a699c4 | 2653 | unixDie("read from thread pipe returned wrong size or error"); |
3ddb9247 | 2654 | |
49a699c4 | 2655 | if(resp) { |
49a699c4 | 2656 | delete resp; |
49467864 | 2657 | resp = nullptr; |
49a699c4 BH |
2658 | } |
2659 | } | |
2660 | } | |
06ea9015 | 2661 | |
b243ca3b | 2662 | // This function is only called by the distributor threads, when pdns-distributes-queries is set |
8171ab83 | 2663 | void distributeAsyncFunction(const string& packet, const pipefunc_t& func) |
00c9b8c1 | 2664 | { |
b243ca3b | 2665 | if (!isDistributorThread()) { |
d77abca1 RG |
2666 | g_log<<Logger::Error<<"distributeAsyncFunction() has been called by a worker ("<<t_id<<")"<<endl; |
2667 | exit(1); | |
2668 | } | |
2669 | ||
8171ab83 | 2670 | unsigned int hash = hashQuestion(packet.c_str(), packet.length(), g_disthashseed); |
b243ca3b | 2671 | unsigned int target = /* skip handler */ 1 + g_numDistributorThreads + (hash % g_numWorkerThreads); |
06ea9015 | 2672 | |
b243ca3b RG |
2673 | const auto& targetInfo = s_threadInfos[target]; |
2674 | if(!targetInfo.isWorker) { | |
2675 | g_log<<Logger::Error<<"distributeAsyncFunction() tried to assign a query to a non-worker thread"<<endl; | |
d77abca1 | 2676 | exit(1); |
00c9b8c1 | 2677 | } |
d77abca1 | 2678 | |
b243ca3b | 2679 | const auto& tps = targetInfo.pipes; |
00c9b8c1 BH |
2680 | ThreadMSG* tmsg = new ThreadMSG(); |
2681 | tmsg->func = func; | |
2682 | tmsg->wantAnswer = false; | |
3ddb9247 | 2683 | |
cf8cda18 RG |
2684 | ssize_t written = write(tps.writeQueriesToThread, &tmsg, sizeof(tmsg)); |
2685 | if (written > 0) { | |
2686 | if (static_cast<size_t>(written) != sizeof(tmsg)) { | |
2687 | delete tmsg; | |
2688 | unixDie("write to thread pipe returned wrong size or error"); | |
2689 | } | |
2690 | } | |
2691 | else { | |
2692 | int error = errno; | |
b841314c | 2693 | delete tmsg; |
cf8cda18 RG |
2694 | if (error == EAGAIN || error == EWOULDBLOCK) { |
2695 | g_stats.queryPipeFullDrops++; | |
2696 | } else { | |
17634427 | 2697 | unixDie("write to thread pipe returned wrong size or error:" + std::to_string(error)); |
cf8cda18 | 2698 | } |
b841314c | 2699 | } |
00c9b8c1 | 2700 | } |
3427fa8a | 2701 | |
d187038c | 2702 | static void handlePipeRequest(int fd, FDMultiplexer::funcparam_t& var) |
49a699c4 | 2703 | { |
f26bf547 | 2704 | ThreadMSG* tmsg = nullptr; |
3ddb9247 | 2705 | |
cf8cda18 | 2706 | if(read(fd, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) { // fd == readToThread || fd == readQueriesToThread |
49a699c4 BH |
2707 | unixDie("read from thread pipe returned wrong size or error"); |
2708 | } | |
3ddb9247 | 2709 | |
2f22827a | 2710 | void *resp=0; |
2711 | try { | |
2712 | resp = tmsg->func(); | |
2713 | } | |
2714 | catch(std::exception& e) { | |
6d2010a8 | 2715 | if(g_logCommonErrors) |
e6a9dde5 | 2716 | g_log<<Logger::Error<<"PIPE function we executed created exception: "<<e.what()<<endl; // but what if they wanted an answer.. we send 0 |
2f22827a | 2717 | } |
2718 | catch(PDNSException& e) { | |
6d2010a8 | 2719 | if(g_logCommonErrors) |
e6a9dde5 | 2720 | g_log<<Logger::Error<<"PIPE function we executed created PDNS exception: "<<e.reason<<endl; // but what if they wanted an answer.. we send 0 |
2f22827a | 2721 | } |
d7c676a5 | 2722 | if(tmsg->wantAnswer) { |
b243ca3b RG |
2723 | const auto& threadInfo = s_threadInfos.at(t_id); |
2724 | if(write(threadInfo.pipes.writeFromThread, &resp, sizeof(resp)) != sizeof(resp)) { | |
d7c676a5 | 2725 | delete tmsg; |
00c9b8c1 | 2726 | unixDie("write to thread pipe returned wrong size or error"); |
d7c676a5 RG |
2727 | } |
2728 | } | |
3ddb9247 | 2729 | |
00c9b8c1 | 2730 | delete tmsg; |
49a699c4 | 2731 | } |
09e6702a | 2732 | |
13034931 BH |
2733 | template<class T> void *voider(const boost::function<T*()>& func) |
2734 | { | |
2735 | return func(); | |
2736 | } | |
2737 | ||
b3b5459d BH |
2738 | vector<ComboAddress>& operator+=(vector<ComboAddress>&a, const vector<ComboAddress>& b) |
2739 | { | |
2740 | a.insert(a.end(), b.begin(), b.end()); | |
2741 | return a; | |
2742 | } | |
2743 | ||
92011b8f | 2744 | vector<pair<string, uint16_t> >& operator+=(vector<pair<string, uint16_t> >&a, const vector<pair<string, uint16_t> >& b) |
2745 | { | |
2746 | a.insert(a.end(), b.begin(), b.end()); | |
2747 | return a; | |
2748 | } | |
2749 | ||
3ddb9247 PD |
2750 | vector<pair<DNSName, uint16_t> >& operator+=(vector<pair<DNSName, uint16_t> >&a, const vector<pair<DNSName, uint16_t> >& b) |
2751 | { | |
2752 | a.insert(a.end(), b.begin(), b.end()); | |
2753 | return a; | |
2754 | } | |
2755 | ||
92011b8f | 2756 | |
387b9ca6 RG |
2757 | /* |
2758 | This function should only be called by the handler to gather metrics, wipe the cache, | |
788eeb4c RG |
2759 | reload the Lua script (not the Lua config) or change the current trace regex, |
2760 | and by the SNMP thread to gather metrics. */ | |
b4e76a18 | 2761 | template<class T> T broadcastAccFunction(const boost::function<T*()>& func) |
3427fa8a | 2762 | { |
b243ca3b | 2763 | if (!isHandlerThread()) { |
788eeb4c | 2764 | g_log<<Logger::Error<<"broadcastAccFunction has been called by a worker ("<<t_id<<")"<<endl; |
d77abca1 | 2765 | exit(1); |
d77abca1 RG |
2766 | } |
2767 | ||
b243ca3b | 2768 | unsigned int n = 0; |
3427fa8a | 2769 | T ret=T(); |
b243ca3b RG |
2770 | for (const auto& threadInfo : s_threadInfos) { |
2771 | if (n++ == t_id) { | |
2772 | continue; | |
2773 | } | |
2774 | ||
2775 | const auto& tps = threadInfo.pipes; | |
00c9b8c1 BH |
2776 | ThreadMSG* tmsg = new ThreadMSG(); |
2777 | tmsg->func = boost::bind(voider<T>, func); | |
2778 | tmsg->wantAnswer = true; | |
3ddb9247 | 2779 | |
b841314c RG |
2780 | if(write(tps.writeToThread, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) { |
2781 | delete tmsg; | |
3427fa8a | 2782 | unixDie("write to thread pipe returned wrong size or error"); |
b841314c | 2783 | } |
3ddb9247 | 2784 | |
49467864 | 2785 | T* resp = nullptr; |
3427fa8a BH |
2786 | if(read(tps.readFromThread, &resp, sizeof(resp)) != sizeof(resp)) |
2787 | unixDie("read from thread pipe returned wrong size or error"); | |
3ddb9247 | 2788 | |
3427fa8a | 2789 | if(resp) { |
3427fa8a BH |
2790 | ret += *resp; |
2791 | delete resp; | |
49467864 | 2792 | resp = nullptr; |
3427fa8a BH |
2793 | } |
2794 | } | |
2795 | return ret; | |
2796 | } | |
2797 | ||
b4e76a18 RG |
2798 | template string broadcastAccFunction(const boost::function<string*()>& fun); // explicit instantiation |
2799 | template uint64_t broadcastAccFunction(const boost::function<uint64_t*()>& fun); // explicit instantiation | |
2800 | template vector<ComboAddress> broadcastAccFunction(const boost::function<vector<ComboAddress> *()>& fun); // explicit instantiation | |
2801 | template vector<pair<DNSName,uint16_t> > broadcastAccFunction(const boost::function<vector<pair<DNSName, uint16_t> > *()>& fun); // explicit instantiation | |
3427fa8a | 2802 | |
d187038c | 2803 | static void handleRCC(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a BH |
2804 | { |
2805 | string remote; | |
2806 | string msg=s_rcc.recv(&remote); | |
2807 | RecursorControlParser rcp; | |
2808 | RecursorControlParser::func_t* command; | |
3ddb9247 | 2809 | |
09e6702a | 2810 | string answer=rcp.getAnswer(msg, &command); |
f0f3f0b0 PL |
2811 | |
2812 | // If we are inside a chroot, we need to strip | |
2813 | if (!arg()["chroot"].empty()) { | |
a683e8bd | 2814 | size_t len = arg()["chroot"].length(); |
f0f3f0b0 PL |
2815 | remote = remote.substr(len); |
2816 | } | |
2817 | ||
ab5c053d BH |
2818 | try { |
2819 | s_rcc.send(answer, &remote); | |
2820 | command(); | |
2821 | } | |
fdbf35ac | 2822 | catch(std::exception& e) { |
e6a9dde5 | 2823 | g_log<<Logger::Error<<"Error dealing with control socket request: "<<e.what()<<endl; |
ab5c053d | 2824 | } |
3f81d239 | 2825 | catch(PDNSException& ae) { |
e6a9dde5 | 2826 | g_log<<Logger::Error<<"Error dealing with control socket request: "<<ae.reason<<endl; |
ab5c053d | 2827 | } |
09e6702a BH |
2828 | } |
2829 | ||
d187038c | 2830 | static void handleTCPClientReadable(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 2831 | { |
0b18b22e | 2832 | PacketID* pident=any_cast<PacketID>(&var); |
667f7e60 | 2833 | // cerr<<"handleTCPClientReadable called for fd "<<fd<<", pident->inNeeded: "<<pident->inNeeded<<", "<<pident->sock->getHandle()<<endl; |
09e6702a | 2834 | |
667f7e60 | 2835 | shared_array<char> buffer(new char[pident->inNeeded]); |
09e6702a | 2836 | |
a683e8bd | 2837 | ssize_t ret=recv(fd, buffer.get(), pident->inNeeded,0); |
09e6702a | 2838 | if(ret > 0) { |
667f7e60 | 2839 | pident->inMSG.append(&buffer[0], &buffer[ret]); |
a683e8bd | 2840 | pident->inNeeded-=(size_t)ret; |
825fa717 | 2841 | if(!pident->inNeeded || pident->inIncompleteOkay) { |
667f7e60 BH |
2842 | // cerr<<"Got entire load of "<<pident->inMSG.size()<<" bytes"<<endl; |
2843 | PacketID pid=*pident; | |
2844 | string msg=pident->inMSG; | |
3ddb9247 | 2845 | |
bb4bdbaf | 2846 | t_fdm->removeReadFD(fd); |
3ddb9247 | 2847 | MT->sendEvent(pid, &msg); |
09e6702a BH |
2848 | } |
2849 | else { | |
667f7e60 | 2850 | // cerr<<"Still have "<<pident->inNeeded<<" left to go"<<endl; |
09e6702a BH |
2851 | } |
2852 | } | |
2853 | else { | |
667f7e60 | 2854 | PacketID tmp=*pident; |
bb4bdbaf | 2855 | t_fdm->removeReadFD(fd); // pident might now be invalid (it isn't, but still) |
09e6702a BH |
2856 | string empty; |
2857 | MT->sendEvent(tmp, &empty); // this conveys error status | |
2858 | } | |
2859 | } | |
2860 | ||
d187038c | 2861 | static void handleTCPClientWritable(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 2862 | { |
0b18b22e | 2863 | PacketID* pid=any_cast<PacketID>(&var); |
a683e8bd | 2864 | ssize_t ret=send(fd, pid->outMSG.c_str() + pid->outPos, pid->outMSG.size() - pid->outPos,0); |
09e6702a | 2865 | if(ret > 0) { |
a683e8bd | 2866 | pid->outPos+=(ssize_t)ret; |
667f7e60 BH |
2867 | if(pid->outPos==pid->outMSG.size()) { |
2868 | PacketID tmp=*pid; | |
bb4bdbaf | 2869 | t_fdm->removeWriteFD(fd); |
09e6702a BH |
2870 | MT->sendEvent(tmp, &tmp.outMSG); // send back what we sent to convey everything is ok |
2871 | } | |
2872 | } | |
2873 | else { // error or EOF | |
667f7e60 | 2874 | PacketID tmp(*pid); |
bb4bdbaf | 2875 | t_fdm->removeWriteFD(fd); |
09e6702a | 2876 | string sent; |
998a4334 | 2877 | MT->sendEvent(tmp, &sent); // we convey error status by sending empty string |
09e6702a BH |
2878 | } |
2879 | } | |
2880 | ||
34801ab1 | 2881 | // resend event to everybody chained onto it |
d187038c | 2882 | static void doResends(MT_t::waiters_t::iterator& iter, PacketID resend, const string& content) |
34801ab1 BH |
2883 | { |
2884 | if(iter->key.chain.empty()) | |
2885 | return; | |
e27e91a8 | 2886 | // cerr<<"doResends called!\n"; |
34801ab1 BH |
2887 | for(PacketID::chain_t::iterator i=iter->key.chain.begin(); i != iter->key.chain.end() ; ++i) { |
2888 | resend.fd=-1; | |
2889 | resend.id=*i; | |
e27e91a8 | 2890 | // cerr<<"\tResending "<<content.size()<<" bytes for fd="<<resend.fd<<" and id="<<resend.id<<endl; |
4665c31e | 2891 | |
34801ab1 BH |
2892 | MT->sendEvent(resend, &content); |
2893 | g_stats.chainResends++; | |
34801ab1 BH |
2894 | } |
2895 | } | |
2896 | ||
d187038c | 2897 | static void handleUDPServerResponse(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 2898 | { |
600fc20b | 2899 | PacketID pid=any_cast<PacketID>(var); |
a683e8bd | 2900 | ssize_t len; |
fae8fe07 RG |
2901 | std::string packet; |
2902 | packet.resize(g_outgoingEDNSBufsize); | |
996c89cc | 2903 | ComboAddress fromaddr; |
09e6702a BH |
2904 | socklen_t addrlen=sizeof(fromaddr); |
2905 | ||
fae8fe07 | 2906 | len=recvfrom(fd, &packet.at(0), packet.size(), 0, (sockaddr *)&fromaddr, &addrlen); |
c1da7976 | 2907 | |
a683e8bd | 2908 | if(len < (ssize_t) sizeof(dnsheader)) { |
998a4334 | 2909 | if(len < 0) |
996c89cc | 2910 | ; // cerr<<"Error on fd "<<fd<<": "<<stringerror()<<"\n"; |
09e6702a | 2911 | else { |
3ddb9247 | 2912 | g_stats.serverParseError++; |
09e6702a | 2913 | if(g_logCommonErrors) |
e6a9dde5 | 2914 | g_log<<Logger::Error<<"Unable to parse packet from remote UDP server "<< fromaddr.toString() << |
e44d9fa7 | 2915 | ": packet smaller than DNS header"<<endl; |
998a4334 | 2916 | } |
34801ab1 | 2917 | |
49a699c4 | 2918 | t_udpclientsocks->returnSocket(fd); |
34801ab1 BH |
2919 | string empty; |
2920 | ||
2921 | MT_t::waiters_t::iterator iter=MT->d_waiters.find(pid); | |
3ddb9247 | 2922 | if(iter != MT->d_waiters.end()) |
34801ab1 | 2923 | doResends(iter, pid, empty); |
3ddb9247 | 2924 | |
34801ab1 | 2925 | MT->sendEvent(pid, &empty); // this denotes error (does lookup again.. at least L1 will be hot) |
998a4334 | 2926 | return; |
3ddb9247 | 2927 | } |
998a4334 | 2928 | |
fae8fe07 | 2929 | packet.resize(len); |
998a4334 | 2930 | dnsheader dh; |
fae8fe07 | 2931 | memcpy(&dh, &packet.at(0), sizeof(dh)); |
3ddb9247 | 2932 | |
6da3b3ad PD |
2933 | PacketID pident; |
2934 | pident.remote=fromaddr; | |
2935 | pident.id=dh.id; | |
2936 | pident.fd=fd; | |
34801ab1 | 2937 | |
33a928af | 2938 | if(!dh.qr && g_logCommonErrors) { |
e6a9dde5 | 2939 | g_log<<Logger::Notice<<"Not taking data from question on outgoing socket from "<< fromaddr.toStringWithPort() <<endl; |
6da3b3ad PD |
2940 | } |
2941 | ||
2942 | if(!dh.qdcount || // UPC, Nominum, very old BIND on FormErr, NSD | |
2943 | !dh.qr) { // one weird server | |
2944 | pident.domain.clear(); | |
2945 | pident.type = 0; | |
2946 | } | |
2947 | else { | |
2948 | try { | |
0b31e67e | 2949 | if(len > 12) |
fae8fe07 | 2950 | pident.domain=DNSName(&packet.at(0), len, 12, false, &pident.type); // don't copy this from above - we need to do the actual read |
6da3b3ad PD |
2951 | } |
2952 | catch(std::exception& e) { | |
2953 | g_stats.serverParseError++; // won't be fed to lwres.cc, so we have to increment | |
e6a9dde5 | 2954 | g_log<<Logger::Warning<<"Error in packet from remote nameserver "<< fromaddr.toStringWithPort() << ": "<<e.what() << endl; |
6da3b3ad | 2955 | return; |
34801ab1 | 2956 | } |
6da3b3ad | 2957 | } |
34801ab1 | 2958 | |
6da3b3ad PD |
2959 | MT_t::waiters_t::iterator iter=MT->d_waiters.find(pident); |
2960 | if(iter != MT->d_waiters.end()) { | |
2961 | doResends(iter, pident, packet); | |
2962 | } | |
c1da7976 | 2963 | |
6da3b3ad | 2964 | retryWithName: |
4957a608 | 2965 | |
6da3b3ad PD |
2966 | if(!MT->sendEvent(pident, &packet)) { |
2967 | // we do a full scan for outstanding queries on unexpected answers. not too bad since we only accept them on the right port number, which is hard enough to guess | |
2968 | for(MT_t::waiters_t::iterator mthread=MT->d_waiters.begin(); mthread!=MT->d_waiters.end(); ++mthread) { | |
2969 | if(pident.fd==mthread->key.fd && mthread->key.remote==pident.remote && mthread->key.type == pident.type && | |
e325f20c | 2970 | pident.domain == mthread->key.domain) { |
6da3b3ad | 2971 | mthread->key.nearMisses++; |
998a4334 | 2972 | } |
6da3b3ad PD |
2973 | |
2974 | // be a bit paranoid here since we're weakening our matching | |
3ddb9247 | 2975 | if(pident.domain.empty() && !mthread->key.domain.empty() && !pident.type && mthread->key.type && |
6da3b3ad PD |
2976 | pident.id == mthread->key.id && mthread->key.remote == pident.remote) { |
2977 | // cerr<<"Empty response, rest matches though, sending to a waiter"<<endl; | |
2978 | pident.domain = mthread->key.domain; | |
2979 | pident.type = mthread->key.type; | |
2980 | goto retryWithName; // note that this only passes on an error, lwres will still reject the packet | |
d4fb76e9 | 2981 | } |
09e6702a | 2982 | } |
6da3b3ad PD |
2983 | g_stats.unexpectedCount++; // if we made it here, it really is an unexpected answer |
2984 | if(g_logCommonErrors) { | |
e6a9dde5 | 2985 | g_log<<Logger::Warning<<"Discarding unexpected packet from "<<fromaddr.toStringWithPort()<<": "<< (pident.domain.empty() ? "<empty>" : pident.domain.toString())<<", "<<pident.type<<", "<<MT->d_waiters.size()<<" waiters"<<endl; |
d8f6d49f | 2986 | } |
09e6702a | 2987 | } |
6da3b3ad PD |
2988 | else if(fd >= 0) { |
2989 | t_udpclientsocks->returnSocket(fd); | |
2990 | } | |
09e6702a BH |
2991 | } |
2992 | ||
1f4abb20 BH |
2993 | FDMultiplexer* getMultiplexer() |
2994 | { | |
2995 | FDMultiplexer* ret; | |
f26bf547 | 2996 | for(const auto& i : FDMultiplexer::getMultiplexerMap()) { |
1f4abb20 | 2997 | try { |
f26bf547 | 2998 | ret=i.second(); |
1f4abb20 BH |
2999 | return ret; |
3000 | } | |
98d0ee4a | 3001 | catch(FDMultiplexerException &fe) { |
e6a9dde5 | 3002 | g_log<<Logger::Error<<"Non-fatal error initializing possible multiplexer ("<<fe.what()<<"), falling back"<<endl; |
98d0ee4a BH |
3003 | } |
3004 | catch(...) { | |
e6a9dde5 | 3005 | g_log<<Logger::Error<<"Non-fatal error initializing possible multiplexer"<<endl; |
98d0ee4a | 3006 | } |
1f4abb20 | 3007 | } |
e6a9dde5 | 3008 | g_log<<Logger::Error<<"No working multiplexer found!"<<endl; |
1f4abb20 BH |
3009 | exit(1); |
3010 | } | |
3011 | ||
3ddb9247 | 3012 | |
d187038c | 3013 | static string* doReloadLuaScript() |
4485aa35 | 3014 | { |
674cf0f6 | 3015 | string fname= ::arg()["lua-dns-script"]; |
4485aa35 | 3016 | try { |
674cf0f6 | 3017 | if(fname.empty()) { |
f26bf547 | 3018 | t_pdl.reset(); |
e6a9dde5 | 3019 | g_log<<Logger::Error<<t_id<<" Unloaded current lua script"<<endl; |
0f39c1a3 | 3020 | return new string("unloaded\n"); |
4485aa35 BH |
3021 | } |
3022 | else { | |
9694e14f AT |
3023 | t_pdl = std::make_shared<RecursorLua4>(); |
3024 | t_pdl->loadFile(fname); | |
4485aa35 BH |
3025 | } |
3026 | } | |
fdbf35ac | 3027 | catch(std::exception& e) { |
e6a9dde5 | 3028 | g_log<<Logger::Error<<t_id<<" Retaining current script, error from '"<<fname<<"': "<< e.what() <<endl; |
0f39c1a3 | 3029 | return new string("retaining current script, error from '"+fname+"': "+e.what()+"\n"); |
4485aa35 | 3030 | } |
3ddb9247 | 3031 | |
e6a9dde5 | 3032 | g_log<<Logger::Warning<<t_id<<" (Re)loaded lua script from '"<<fname<<"'"<<endl; |
0f39c1a3 | 3033 | return new string("(re)loaded '"+fname+"'\n"); |
4485aa35 BH |
3034 | } |
3035 | ||
49a699c4 BH |
3036 | string doQueueReloadLuaScript(vector<string>::const_iterator begin, vector<string>::const_iterator end) |
3037 | { | |
3ddb9247 | 3038 | if(begin != end) |
49a699c4 | 3039 | ::arg().set("lua-dns-script") = *begin; |
3ddb9247 | 3040 | |
0f39c1a3 | 3041 | return broadcastAccFunction<string>(doReloadLuaScript); |
3ddb9247 | 3042 | } |
49a699c4 | 3043 | |
d187038c | 3044 | static string* pleaseUseNewTraceRegex(const std::string& newRegex) |
77499b05 BH |
3045 | try |
3046 | { | |
3047 | if(newRegex.empty()) { | |
f26bf547 | 3048 | t_traceRegex.reset(); |
77499b05 BH |
3049 | return new string("unset\n"); |
3050 | } | |
3051 | else { | |
f26bf547 | 3052 | t_traceRegex = std::make_shared<Regex>(newRegex); |
77499b05 BH |
3053 | return new string("ok\n"); |
3054 | } | |
3055 | } | |
3f81d239 | 3056 | catch(PDNSException& ae) |
77499b05 BH |
3057 | { |
3058 | return new string(ae.reason+"\n"); | |
3059 | } | |
3060 | ||
3061 | string doTraceRegex(vector<string>::const_iterator begin, vector<string>::const_iterator end) | |
3062 | { | |
3063 | return broadcastAccFunction<string>(boost::bind(pleaseUseNewTraceRegex, begin!=end ? *begin : "")); | |
3064 | } | |
3065 | ||
4e9a20e6 | 3066 | static void checkLinuxIPv6Limits() |
3067 | { | |
3068 | #ifdef __linux__ | |
3069 | string line; | |
3070 | if(readFileIfThere("/proc/sys/net/ipv6/route/max_size", &line)) { | |
335da0ba | 3071 | int lim=std::stoi(line); |
4e9a20e6 | 3072 | if(lim < 16384) { |
e6a9dde5 | 3073 | g_log<<Logger::Error<<"If using IPv6, please raise sysctl net.ipv6.route.max_size, currently set to "<<lim<<" which is < 16384"<<endl; |
4e9a20e6 | 3074 | } |
3075 | } | |
3076 | #endif | |
3077 | } | |
36849ff2 | 3078 | static void checkOrFixFDS() |
4e9a20e6 | 3079 | { |
c0063e60 | 3080 | unsigned int availFDs=getFilenumLimit(); |
3081 | unsigned int wantFDs = g_maxMThreads * g_numWorkerThreads +25; // even healthier margin then before | |
3082 | ||
3083 | if(wantFDs > availFDs) { | |
067ad20e | 3084 | unsigned int hardlimit= getFilenumLimit(true); |
3085 | if(hardlimit >= wantFDs) { | |
c0063e60 | 3086 | setFilenumLimit(wantFDs); |
e6a9dde5 | 3087 | g_log<<Logger::Warning<<"Raised soft limit on number of filedescriptors to "<<wantFDs<<" to match max-mthreads and threads settings"<<endl; |
36849ff2 | 3088 | } |
3089 | else { | |
067ad20e | 3090 | int newval = (hardlimit - 25) / g_numWorkerThreads; |
e6a9dde5 | 3091 | g_log<<Logger::Warning<<"Insufficient number of filedescriptors available for max-mthreads*threads setting! ("<<hardlimit<<" < "<<wantFDs<<"), reducing max-mthreads to "<<newval<<endl; |
36849ff2 | 3092 | g_maxMThreads = newval; |
067ad20e | 3093 | setFilenumLimit(hardlimit); |
36849ff2 | 3094 | } |
3095 | } | |
4e9a20e6 | 3096 | } |
77499b05 | 3097 | |
b243ca3b | 3098 | static void* recursorThread(unsigned int tid); |
51e2144e | 3099 | |
f26bf547 | 3100 | static void* pleaseSupplantACLs(std::shared_ptr<NetmaskGroup> ng) |
49a699c4 BH |
3101 | { |
3102 | t_allowFrom = ng; | |
f26bf547 | 3103 | return nullptr; |
49a699c4 BH |
3104 | } |
3105 | ||
dbd23fc2 BH |
3106 | int g_argc; |
3107 | char** g_argv; | |
3108 | ||
18af64a8 | 3109 | void parseACLs() |
f7c1d4e3 | 3110 | { |
18af64a8 | 3111 | static bool l_initialized; |
3ddb9247 | 3112 | |
49a699c4 | 3113 | if(l_initialized) { // only reload configuration file on second call |
18af64a8 | 3114 | string configname=::arg()["config-dir"]+"/recursor.conf"; |
3e63da83 JR |
3115 | if(::arg()["config-name"]!="") { |
3116 | configname=::arg()["config-dir"]+"/recursor-"+::arg()["config-name"]+".conf"; | |
3117 | } | |
18af64a8 | 3118 | cleanSlashes(configname); |
3ddb9247 PD |
3119 | |
3120 | if(!::arg().preParseFile(configname.c_str(), "allow-from-file")) | |
7e818521 | 3121 | throw runtime_error("Unable to re-parse configuration file '"+configname+"'"); |
49a699c4 | 3122 | ::arg().preParseFile(configname.c_str(), "allow-from", LOCAL_NETS); |
242b90e1 | 3123 | ::arg().preParseFile(configname.c_str(), "include-dir"); |
829849d6 AT |
3124 | ::arg().preParse(g_argc, g_argv, "include-dir"); |
3125 | ||
3126 | // then process includes | |
3127 | std::vector<std::string> extraConfigs; | |
242b90e1 AT |
3128 | ::arg().gatherIncludes(extraConfigs); |
3129 | ||
1dc8f4d0 | 3130 | for(const std::string& fn : extraConfigs) { |
7e818521 | 3131 | if(!::arg().preParseFile(fn.c_str(), "allow-from-file", ::arg()["allow-from-file"])) |
3132 | throw runtime_error("Unable to re-parse configuration file include '"+fn+"'"); | |
3133 | if(!::arg().preParseFile(fn.c_str(), "allow-from", ::arg()["allow-from"])) | |
3134 | throw runtime_error("Unable to re-parse configuration file include '"+fn+"'"); | |
829849d6 | 3135 | } |
ca2c884c AT |
3136 | |
3137 | ::arg().preParse(g_argc, g_argv, "allow-from-file"); | |
3138 | ::arg().preParse(g_argc, g_argv, "allow-from"); | |
f27e6356 | 3139 | } |
49a699c4 | 3140 | |
f26bf547 RG |
3141 | std::shared_ptr<NetmaskGroup> oldAllowFrom = t_allowFrom; |
3142 | std::shared_ptr<NetmaskGroup> allowFrom = std::make_shared<NetmaskGroup>(); | |
3ddb9247 | 3143 | |
2c95fc65 BH |
3144 | if(!::arg()["allow-from-file"].empty()) { |
3145 | string line; | |
2c95fc65 BH |
3146 | ifstream ifs(::arg()["allow-from-file"].c_str()); |
3147 | if(!ifs) { | |
9c61b9d0 | 3148 | throw runtime_error("Could not open '"+::arg()["allow-from-file"]+"': "+stringerror()); |
2c95fc65 BH |
3149 | } |
3150 | ||
3151 | string::size_type pos; | |
3152 | while(getline(ifs,line)) { | |
3153 | pos=line.find('#'); | |
3154 | if(pos!=string::npos) | |
3155 | line.resize(pos); | |
3156 | trim(line); | |
3157 | if(line.empty()) | |
3158 | continue; | |
3159 | ||
18af64a8 | 3160 | allowFrom->addMask(line); |
2c95fc65 | 3161 | } |
e6a9dde5 | 3162 | g_log<<Logger::Warning<<"Done parsing " << allowFrom->size() <<" allow-from ranges from file '"<<::arg()["allow-from-file"]<<"' - overriding 'allow-from' setting"<<endl; |
2c95fc65 BH |
3163 | } |
3164 | else if(!::arg()["allow-from"].empty()) { | |
f7c1d4e3 BH |
3165 | vector<string> ips; |
3166 | stringtok(ips, ::arg()["allow-from"], ", "); | |
3ddb9247 | 3167 | |
e6a9dde5 | 3168 | g_log<<Logger::Warning<<"Only allowing queries from: "; |
f7c1d4e3 | 3169 | for(vector<string>::const_iterator i = ips.begin(); i!= ips.end(); ++i) { |
18af64a8 | 3170 | allowFrom->addMask(*i); |
f7c1d4e3 | 3171 | if(i!=ips.begin()) |
e6a9dde5 PL |
3172 | g_log<<Logger::Warning<<", "; |
3173 | g_log<<Logger::Warning<<*i; | |
f7c1d4e3 | 3174 | } |
e6a9dde5 | 3175 | g_log<<Logger::Warning<<endl; |
f7c1d4e3 | 3176 | } |
49a699c4 | 3177 | else { |
3ddb9247 | 3178 | if(::arg()["local-address"]!="127.0.0.1" && ::arg().asNum("local-port")==53) |
e6a9dde5 | 3179 | g_log<<Logger::Error<<"WARNING: Allowing queries from all IP addresses - this can be a security risk!"<<endl; |
f26bf547 | 3180 | allowFrom = nullptr; |
49a699c4 | 3181 | } |
3ddb9247 | 3182 | |
49a699c4 | 3183 | g_initialAllowFrom = allowFrom; |
d7dae798 | 3184 | broadcastFunction(boost::bind(pleaseSupplantACLs, allowFrom)); |
f26bf547 | 3185 | oldAllowFrom = nullptr; |
3ddb9247 | 3186 | |
49a699c4 | 3187 | l_initialized = true; |
18af64a8 BH |
3188 | } |
3189 | ||
795215f2 | 3190 | |
756e82cf | 3191 | static void setupDelegationOnly() |
3192 | { | |
3193 | vector<string> parts; | |
3194 | stringtok(parts, ::arg()["delegation-only"], ", \t"); | |
3195 | for(const auto& p : parts) { | |
9065eb05 | 3196 | SyncRes::addDelegationOnly(DNSName(p)); |
756e82cf | 3197 | } |
3198 | } | |
795215f2 | 3199 | |
8fd25133 RG |
3200 | static std::map<unsigned int, std::set<int> > parseCPUMap() |
3201 | { | |
3202 | std::map<unsigned int, std::set<int> > result; | |
3203 | ||
3204 | const std::string value = ::arg()["cpu-map"]; | |
3205 | ||
3206 | if (!value.empty() && !isSettingThreadCPUAffinitySupported()) { | |
e6a9dde5 | 3207 | g_log<<Logger::Warning<<"CPU mapping requested but not supported, skipping"<<endl; |
8fd25133 RG |
3208 | return result; |
3209 | } | |
3210 | ||
3211 | std::vector<std::string> parts; | |
3212 | ||
3213 | stringtok(parts, value, " \t"); | |
3214 | ||
3215 | for(const auto& part : parts) { | |
3216 | if (part.find('=') == string::npos) | |
3217 | continue; | |
3218 | ||
3219 | try { | |
3220 | auto headers = splitField(part, '='); | |
3221 | trim(headers.first); | |
3222 | trim(headers.second); | |
3223 | ||
3224 | unsigned int threadId = pdns_stou(headers.first); | |
3225 | std::vector<std::string> cpus; | |
3226 | ||
3227 | stringtok(cpus, headers.second, ","); | |
3228 | ||
3229 | for(const auto& cpu : cpus) { | |
3230 | int cpuId = std::stoi(cpu); | |
3231 | ||
3232 | result[threadId].insert(cpuId); | |
3233 | } | |
3234 | } | |
3235 | catch(const std::exception& e) { | |
e6a9dde5 | 3236 | g_log<<Logger::Error<<"Error parsing cpu-map entry '"<<part<<"': "<<e.what()<<endl; |
8fd25133 RG |
3237 | } |
3238 | } | |
3239 | ||
3240 | return result; | |
3241 | } | |
3242 | ||
3243 | static void setCPUMap(const std::map<unsigned int, std::set<int> >& cpusMap, unsigned int n, pthread_t tid) | |
3244 | { | |
3245 | const auto& cpuMapping = cpusMap.find(n); | |
3246 | if (cpuMapping != cpusMap.cend()) { | |
3247 | int rc = mapThreadToCPUList(tid, cpuMapping->second); | |
3248 | if (rc == 0) { | |
e6a9dde5 | 3249 | g_log<<Logger::Info<<"CPU affinity for worker "<<n<<" has been set to CPU map:"; |
8fd25133 | 3250 | for (const auto cpu : cpuMapping->second) { |
e6a9dde5 | 3251 | g_log<<Logger::Info<<" "<<cpu; |
8fd25133 | 3252 | } |
e6a9dde5 | 3253 | g_log<<Logger::Info<<endl; |
8fd25133 RG |
3254 | } |
3255 | else { | |
e6a9dde5 | 3256 | g_log<<Logger::Warning<<"Error setting CPU affinity for worker "<<n<<" to CPU map:"; |
8fd25133 | 3257 | for (const auto cpu : cpuMapping->second) { |
e6a9dde5 | 3258 | g_log<<Logger::Info<<" "<<cpu; |
8fd25133 | 3259 | } |
e6a9dde5 | 3260 | g_log<<Logger::Info<<strerror(rc)<<endl; |
8fd25133 RG |
3261 | } |
3262 | } | |
3263 | } | |
3264 | ||
af1377b7 NC |
3265 | #ifdef NOD_ENABLED |
3266 | static void setupNODThread() | |
3267 | { | |
3268 | if (g_nodEnabled) { | |
3269 | t_nodDBp = std::make_shared<nod::NODDB>(); | |
3270 | try { | |
3271 | t_nodDBp->setCacheDir(::arg()["new-domain-history-dir"]); | |
3272 | } | |
3273 | catch (const PDNSException& e) { | |
3274 | g_log<<Logger::Error<<"new-domain-history-dir (" << ::arg()["new-domain-history-dir"] << ") is not readable or does not exist"<<endl; | |
3275 | _exit(1); | |
3276 | } | |
3277 | if (!t_nodDBp->init()) { | |
3278 | g_log<<Logger::Error<<"Could not initialize domain tracking"<<endl; | |
3279 | _exit(1); | |
3280 | } | |
3281 | std::thread t(nod::NODDB::startHousekeepingThread, t_nodDBp); | |
3282 | t.detach(); | |
3283 | } | |
3284 | } | |
3285 | ||
3286 | void parseNODWhitelist(const std::string& wlist) | |
3287 | { | |
3288 | vector<string> parts; | |
3289 | stringtok(parts, wlist, ",; "); | |
3290 | for(const auto& a : parts) { | |
3291 | g_nodDomainWL.add(DNSName(a)); | |
3292 | } | |
3293 | } | |
3294 | ||
3295 | static void setupNODGlobal() | |
3296 | { | |
3297 | // Setup NOD subsystem | |
3298 | g_nodEnabled = ::arg().mustDo("new-domain-tracking"); | |
3299 | g_nodLookupDomain = DNSName(::arg()["new-domain-lookup"]); | |
3300 | g_nodLog = ::arg().mustDo("new-domain-log"); | |
3301 | parseNODWhitelist(::arg()["new-domain-whitelist"]); | |
3302 | } | |
3303 | #endif /* NOD_ENABLED */ | |
3304 | ||
d187038c | 3305 | static int serviceMain(int argc, char*argv[]) |
18af64a8 | 3306 | { |
e6a9dde5 PL |
3307 | g_log.setName(s_programname); |
3308 | g_log.disableSyslog(::arg().mustDo("disable-syslog")); | |
3309 | g_log.setTimestamps(::arg().mustDo("log-timestamp")); | |
18af64a8 BH |
3310 | |
3311 | if(!::arg()["logging-facility"].empty()) { | |
f8499e52 BH |
3312 | int val=logFacilityToLOG(::arg().asNum("logging-facility") ); |
3313 | if(val >= 0) | |
e6a9dde5 | 3314 | g_log.setFacility(val); |
18af64a8 | 3315 | else |
e6a9dde5 | 3316 | g_log<<Logger::Error<<"Unknown logging facility "<<::arg().asNum("logging-facility") <<endl; |
18af64a8 BH |
3317 | } |
3318 | ||
ba1a571d | 3319 | showProductVersion(); |
3afde9b2 | 3320 | |
06ea9015 | 3321 | g_disthashseed=dns_random(0xffffffff); |
3322 | ||
b7ef5828 PL |
3323 | checkLinuxIPv6Limits(); |
3324 | try { | |
3325 | vector<string> addrs; | |
3326 | if(!::arg()["query-local-address6"].empty()) { | |
3327 | SyncRes::s_doIPv6=true; | |
e6a9dde5 | 3328 | g_log<<Logger::Warning<<"Enabling IPv6 transport for outgoing queries"<<endl; |
b7ef5828 PL |
3329 | |
3330 | stringtok(addrs, ::arg()["query-local-address6"], ", ;"); | |
3331 | for(const string& addr : addrs) { | |
3332 | g_localQueryAddresses6.push_back(ComboAddress(addr)); | |
3333 | } | |
3334 | } | |
3335 | else { | |
e6a9dde5 | 3336 | g_log<<Logger::Warning<<"NOT using IPv6 for outgoing queries - set 'query-local-address6=::' to enable"<<endl; |
b7ef5828 PL |
3337 | } |
3338 | addrs.clear(); | |
3339 | stringtok(addrs, ::arg()["query-local-address"], ", ;"); | |
3340 | for(const string& addr : addrs) { | |
3341 | g_localQueryAddresses4.push_back(ComboAddress(addr)); | |
3342 | } | |
3343 | } | |
3344 | catch(std::exception& e) { | |
e6a9dde5 | 3345 | g_log<<Logger::Error<<"Assigning local query addresses: "<<e.what(); |
b7ef5828 PL |
3346 | exit(99); |
3347 | } | |
3348 | ||
e48c6b8a PL |
3349 | // keep this ABOVE loadRecursorLuaConfig! |
3350 | if(::arg()["dnssec"]=="off") | |
3351 | g_dnssecmode=DNSSECMode::Off; | |
3352 | else if(::arg()["dnssec"]=="process-no-validate") | |
3353 | g_dnssecmode=DNSSECMode::ProcessNoValidate; | |
3354 | else if(::arg()["dnssec"]=="process") | |
3355 | g_dnssecmode=DNSSECMode::Process; | |
3356 | else if(::arg()["dnssec"]=="validate") | |
3357 | g_dnssecmode=DNSSECMode::ValidateAll; | |
3358 | else if(::arg()["dnssec"]=="log-fail") | |
3359 | g_dnssecmode=DNSSECMode::ValidateForLog; | |
3360 | else { | |
e6a9dde5 | 3361 | g_log<<Logger::Error<<"Unknown DNSSEC mode "<<::arg()["dnssec"]<<endl; |
e48c6b8a PL |
3362 | exit(1); |
3363 | } | |
3364 | ||
3365 | g_dnssecLogBogus = ::arg().mustDo("dnssec-log-bogus"); | |
d377bb54 | 3366 | g_maxNSEC3Iterations = ::arg().asNum("nsec3-max-iterations"); |
e48c6b8a | 3367 | |
a6f7f5fe | 3368 | g_maxCacheEntries = ::arg().asNum("max-cache-entries"); |
3369 | g_maxPacketCacheEntries = ::arg().asNum("max-packetcache-entries"); | |
e6ec15bf RG |
3370 | |
3371 | luaConfigDelayedThreads delayedLuaThreads; | |
0f5785a6 | 3372 | try { |
e6ec15bf | 3373 | loadRecursorLuaConfig(::arg()["lua-config-file"], delayedLuaThreads); |
0f5785a6 PL |
3374 | } |
3375 | catch (PDNSException &e) { | |
e6a9dde5 | 3376 | g_log<<Logger::Error<<"Cannot load Lua configuration: "<<e.reason<<endl; |
0f5785a6 PL |
3377 | exit(1); |
3378 | } | |
ad42489c | 3379 | |
18af64a8 | 3380 | parseACLs(); |
92011b8f | 3381 | sortPublicSuffixList(); |
3382 | ||
eb5bae86 | 3383 | if(!::arg()["dont-query"].empty()) { |
eb5bae86 BH |
3384 | vector<string> ips; |
3385 | stringtok(ips, ::arg()["dont-query"], ", "); | |
66e0b6ea BH |
3386 | ips.push_back("0.0.0.0"); |
3387 | ips.push_back("::"); | |
c36bc97a | 3388 | |
e6a9dde5 | 3389 | g_log<<Logger::Warning<<"Will not send queries to: "; |
eb5bae86 | 3390 | for(vector<string>::const_iterator i = ips.begin(); i!= ips.end(); ++i) { |
9065eb05 | 3391 | SyncRes::addDontQuery(*i); |
eb5bae86 | 3392 | if(i!=ips.begin()) |
e6a9dde5 PL |
3393 | g_log<<Logger::Warning<<", "; |
3394 | g_log<<Logger::Warning<<*i; | |
eb5bae86 | 3395 | } |
e6a9dde5 | 3396 | g_log<<Logger::Warning<<endl; |
eb5bae86 BH |
3397 | } |
3398 | ||
f7c1d4e3 | 3399 | g_quiet=::arg().mustDo("quiet"); |
3ddb9247 | 3400 | |
b243ca3b | 3401 | /* this needs to be done before parseACLs(), which call broadcastFunction() */ |
1bc3c142 BH |
3402 | g_weDistributeQueries = ::arg().mustDo("pdns-distributes-queries"); |
3403 | if(g_weDistributeQueries) { | |
b243ca3b | 3404 | g_log<<Logger::Warning<<"PowerDNS Recursor itself will distribute queries over threads"<<endl; |
1bc3c142 | 3405 | } |
3ddb9247 | 3406 | |
756e82cf | 3407 | setupDelegationOnly(); |
b33c2462 | 3408 | g_outgoingEDNSBufsize=::arg().asNum("edns-outgoing-bufsize"); |
756e82cf | 3409 | |
77499b05 BH |
3410 | if(::arg()["trace"]=="fail") { |
3411 | SyncRes::setDefaultLogMode(SyncRes::Store); | |
3412 | } | |
3413 | else if(::arg().mustDo("trace")) { | |
3414 | SyncRes::setDefaultLogMode(SyncRes::Log); | |
f7c1d4e3 BH |
3415 | ::arg().set("quiet")="no"; |
3416 | g_quiet=false; | |
3e9c6c0a | 3417 | g_dnssecLOG=true; |
f7c1d4e3 | 3418 | } |
43a9b290 PL |
3419 | string myHostname = getHostname(); |
3420 | if (myHostname == "UNKNOWN"){ | |
3421 | g_log<<Logger::Warning<<"Unable to get the hostname, NSID and id.server values will be empty"<<endl; | |
3422 | myHostname = ""; | |
d0983bff | 3423 | } |
3ddb9247 | 3424 | |
aadceba8 | 3425 | SyncRes::s_minimumTTL = ::arg().asNum("minimum-ttl-override"); |
3426 | ||
1051f8a9 BH |
3427 | SyncRes::s_nopacketcache = ::arg().mustDo("disable-packetcache"); |
3428 | ||
f7c1d4e3 | 3429 | SyncRes::s_maxnegttl=::arg().asNum("max-negative-ttl"); |
63637fd8 | 3430 | SyncRes::s_maxcachettl=max(::arg().asNum("max-cache-ttl"), 15); |
1051f8a9 | 3431 | SyncRes::s_packetcachettl=::arg().asNum("packetcache-ttl"); |
79ec0627 PL |
3432 | // Cap the packetcache-servfail-ttl to the packetcache-ttl |
3433 | uint32_t packetCacheServFailTTL = ::arg().asNum("packetcache-servfail-ttl"); | |
3434 | SyncRes::s_packetcacheservfailttl=(packetCacheServFailTTL > SyncRes::s_packetcachettl) ? SyncRes::s_packetcachettl : packetCacheServFailTTL; | |
628e2c7b PA |
3435 | SyncRes::s_serverdownmaxfails=::arg().asNum("server-down-max-fails"); |
3436 | SyncRes::s_serverdownthrottletime=::arg().asNum("server-down-throttle-time"); | |
f7c1d4e3 | 3437 | SyncRes::s_serverID=::arg()["server-id"]; |
173d790e | 3438 | SyncRes::s_maxqperq=::arg().asNum("max-qperq"); |
9de3e034 | 3439 | SyncRes::s_maxtotusec=1000*::arg().asNum("max-total-msec"); |
7c3398aa | 3440 | SyncRes::s_maxdepth=::arg().asNum("max-recursion-depth"); |
01402d56 | 3441 | SyncRes::s_rootNXTrust = ::arg().mustDo( "root-nx-trust"); |
f7c1d4e3 | 3442 | if(SyncRes::s_serverID.empty()) { |
d0983bff | 3443 | SyncRes::s_serverID = myHostname; |
f7c1d4e3 | 3444 | } |
3ddb9247 | 3445 | |
e9f9b8ec RG |
3446 | SyncRes::s_ecsipv4limit = ::arg().asNum("ecs-ipv4-bits"); |
3447 | SyncRes::s_ecsipv6limit = ::arg().asNum("ecs-ipv6-bits"); | |
3448 | ||
8a3a3822 RG |
3449 | if (!::arg().isEmpty("ecs-scope-zero-address")) { |
3450 | ComboAddress scopeZero(::arg()["ecs-scope-zero-address"]); | |
3451 | SyncRes::setECSScopeZeroAddress(Netmask(scopeZero, scopeZero.isIPv4() ? 32 : 128)); | |
3452 | } | |
3453 | else { | |
3454 | bool found = false; | |
3455 | for (const auto& addr : g_localQueryAddresses4) { | |
3456 | if (!IsAnyAddress(addr)) { | |
3457 | SyncRes::setECSScopeZeroAddress(Netmask(addr, 32)); | |
3458 | found = true; | |
3459 | break; | |
3460 | } | |
3461 | } | |
3462 | if (!found) { | |
3463 | for (const auto& addr : g_localQueryAddresses6) { | |
3464 | if (!IsAnyAddress(addr)) { | |
3465 | SyncRes::setECSScopeZeroAddress(Netmask(addr, 128)); | |
3466 | found = true; | |
3467 | break; | |
3468 | } | |
3469 | } | |
3470 | if (!found) { | |
3471 | SyncRes::setECSScopeZeroAddress(Netmask("127.0.0.1/32")); | |
3472 | } | |
3473 | } | |
3474 | } | |
3475 | ||
2fe3354d CH |
3476 | SyncRes::parseEDNSSubnetWhitelist(::arg()["edns-subnet-whitelist"]); |
3477 | SyncRes::parseEDNSSubnetAddFor(::arg()["ecs-add-for"]); | |
3478 | g_useIncomingECS = ::arg().mustDo("use-incoming-edns-subnet"); | |
3479 | ||
5cc8371b | 3480 | g_XPFAcl.toMasks(::arg()["xpf-allow-from"]); |
59cb4a79 | 3481 | g_xpfRRCode = ::arg().asNum("xpf-rr-code"); |
5cc8371b | 3482 | |
5b0ddd18 | 3483 | g_networkTimeoutMsec = ::arg().asNum("network-timeout"); |
bb4bdbaf | 3484 | |
49a699c4 | 3485 | g_initialDomainMap = parseAuthAndForwards(); |
3ddb9247 | 3486 | |
08f3f638 | 3487 | g_latencyStatSize=::arg().asNum("latency-statistic-size"); |
3ddb9247 | 3488 | |
f7c1d4e3 | 3489 | g_logCommonErrors=::arg().mustDo("log-common-errors"); |
98d36505 | 3490 | g_logRPZChanges = ::arg().mustDo("log-rpz-changes"); |
e661a20b PD |
3491 | |
3492 | g_anyToTcp = ::arg().mustDo("any-to-tcp"); | |
a09a8ce0 PD |
3493 | g_udpTruncationThreshold = ::arg().asNum("udp-truncation-threshold"); |
3494 | ||
b3adda56 PD |
3495 | g_lowercaseOutgoing = ::arg().mustDo("lowercase-outgoing"); |
3496 | ||
b243ca3b | 3497 | g_numDistributorThreads = ::arg().asNum("distributor-threads"); |
810ff705 | 3498 | g_numWorkerThreads = ::arg().asNum("threads"); |
1c4f2e1b | 3499 | if (g_numWorkerThreads < 1) { |
e6a9dde5 | 3500 | g_log<<Logger::Warning<<"Asked to run with 0 threads, raising to 1 instead"<<endl; |
1c4f2e1b RG |
3501 | g_numWorkerThreads = 1; |
3502 | } | |
3503 | ||
b243ca3b | 3504 | g_numThreads = g_numDistributorThreads + g_numWorkerThreads; |
810ff705 RG |
3505 | g_maxMThreads = ::arg().asNum("max-mthreads"); |
3506 | ||
00b8cadc RG |
3507 | g_gettagNeedsEDNSOptions = ::arg().mustDo("gettag-needs-edns-options"); |
3508 | ||
0ec489bf | 3509 | g_statisticsInterval = ::arg().asNum("statistics-interval"); |
3510 | ||
810ff705 RG |
3511 | #ifdef SO_REUSEPORT |
3512 | g_reusePort = ::arg().mustDo("reuseport"); | |
3513 | #endif | |
3514 | ||
b243ca3b | 3515 | s_threadInfos.resize(g_numDistributorThreads + g_numWorkerThreads + /* handler */ 1); |
810ff705 | 3516 | |
b243ca3b RG |
3517 | if (g_reusePort) { |
3518 | if (g_weDistributeQueries) { | |
3519 | /* first thread is the handler, then distributors */ | |
3520 | for (unsigned int threadId = 1; threadId <= g_numDistributorThreads; threadId++) { | |
3521 | auto& deferredAdds = s_threadInfos.at(threadId).deferredAdds; | |
adb6cd72 | 3522 | auto& tcpSockets = s_threadInfos.at(threadId).tcpSockets; |
b243ca3b | 3523 | makeUDPServerSockets(deferredAdds); |
adb6cd72 | 3524 | makeTCPServerSockets(deferredAdds, tcpSockets); |
b243ca3b RG |
3525 | } |
3526 | } | |
3527 | else { | |
3528 | /* first thread is the handler, there is no distributor here and workers are accepting queries */ | |
3529 | for (unsigned int threadId = 1; threadId <= g_numWorkerThreads; threadId++) { | |
3530 | auto& deferredAdds = s_threadInfos.at(threadId).deferredAdds; | |
adb6cd72 | 3531 | auto& tcpSockets = s_threadInfos.at(threadId).tcpSockets; |
b243ca3b | 3532 | makeUDPServerSockets(deferredAdds); |
adb6cd72 | 3533 | makeTCPServerSockets(deferredAdds, tcpSockets); |
b243ca3b | 3534 | } |
810ff705 RG |
3535 | } |
3536 | } | |
3537 | else { | |
c47f201b | 3538 | std::set<int> tcpSockets; |
b243ca3b RG |
3539 | /* we don't have reuseport so we can only open one socket per |
3540 | listening addr:port and everyone will listen on it */ | |
3541 | makeUDPServerSockets(g_deferredAdds); | |
c47f201b RG |
3542 | makeTCPServerSockets(g_deferredAdds, tcpSockets); |
3543 | ||
3544 | /* every listener (so distributor if g_weDistributeQueries, workers otherwise) | |
3545 | needs to listen to the shared sockets */ | |
3546 | if (g_weDistributeQueries) { | |
3547 | /* first thread is the handler, then distributors */ | |
3548 | for (unsigned int threadId = 1; threadId <= g_numDistributorThreads; threadId++) { | |
3549 | s_threadInfos.at(threadId).tcpSockets = tcpSockets; | |
3550 | } | |
3551 | } | |
3552 | else { | |
3553 | /* first thread is the handler, there is no distributor here and workers are accepting queries */ | |
3554 | for (unsigned int threadId = 1; threadId <= g_numWorkerThreads; threadId++) { | |
3555 | s_threadInfos.at(threadId).tcpSockets = tcpSockets; | |
3556 | } | |
3557 | } | |
810ff705 | 3558 | } |
815099b2 | 3559 | |
af1377b7 NC |
3560 | #ifdef NOD_ENABLED |
3561 | // Setup newly observed domain globals | |
3562 | setupNODGlobal(); | |
3563 | #endif /* NOD_ENABLED */ | |
3564 | ||
677e2a46 BH |
3565 | int forks; |
3566 | for(forks = 0; forks < ::arg().asNum("processes") - 1; ++forks) { | |
1bc3c142 BH |
3567 | if(!fork()) // we are child |
3568 | break; | |
3569 | } | |
3ddb9247 | 3570 | |
f7c1d4e3 | 3571 | if(::arg().mustDo("daemon")) { |
e6a9dde5 PL |
3572 | g_log<<Logger::Warning<<"Calling daemonize, going to background"<<endl; |
3573 | g_log.toConsole(Logger::Critical); | |
f7c1d4e3 BH |
3574 | daemonize(); |
3575 | } | |
3576 | signal(SIGUSR1,usr1Handler); | |
3577 | signal(SIGUSR2,usr2Handler); | |
3578 | signal(SIGPIPE,SIG_IGN); | |
810ff705 | 3579 | |
a6414fdc | 3580 | checkOrFixFDS(); |
3ddb9247 | 3581 | |
d1b28475 KM |
3582 | #ifdef HAVE_LIBSODIUM |
3583 | if (sodium_init() == -1) { | |
e6a9dde5 | 3584 | g_log<<Logger::Error<<"Unable to initialize sodium crypto library"<<endl; |
d1b28475 KM |
3585 | exit(99); |
3586 | } | |
3587 | #endif | |
3588 | ||
3afde9b2 PL |
3589 | openssl_thread_setup(); |
3590 | openssl_seed(); | |
e97cb679 AT |
3591 | /* setup rng before chroot */ |
3592 | dns_random_init(); | |
3afde9b2 | 3593 | |
bdbb07e0 | 3594 | if(::arg()["server-id"].empty()) { |
d0983bff | 3595 | ::arg().set("server-id") = myHostname; |
bdbb07e0 PL |
3596 | } |
3597 | ||
138435cb BH |
3598 | int newgid=0; |
3599 | if(!::arg()["setgid"].empty()) | |
3600 | newgid=Utility::makeGidNumeric(::arg()["setgid"]); | |
3601 | int newuid=0; | |
3602 | if(!::arg()["setuid"].empty()) | |
3603 | newuid=Utility::makeUidNumeric(::arg()["setuid"]); | |
3604 | ||
f1d6a7ce KM |
3605 | Utility::dropGroupPrivs(newuid, newgid); |
3606 | ||
138435cb | 3607 | if (!::arg()["chroot"].empty()) { |
75336810 PL |
3608 | #ifdef HAVE_SYSTEMD |
3609 | char *ns; | |
3610 | ns = getenv("NOTIFY_SOCKET"); | |
3611 | if (ns != nullptr) { | |
e6a9dde5 | 3612 | g_log<<Logger::Error<<"Unable to chroot when running from systemd. Please disable chroot= or set the 'Type' for this service to 'simple'"<<endl; |
75336810 PL |
3613 | exit(1); |
3614 | } | |
3615 | #endif | |
138435cb | 3616 | if (chroot(::arg()["chroot"].c_str())<0 || chdir("/") < 0) { |
e6a9dde5 | 3617 | g_log<<Logger::Error<<"Unable to chroot to '"+::arg()["chroot"]+"': "<<strerror (errno)<<", exiting"<<endl; |
138435cb BH |
3618 | exit(1); |
3619 | } | |
f0f3f0b0 | 3620 | else |
e6a9dde5 | 3621 | g_log<<Logger::Error<<"Chrooted to '"<<::arg()["chroot"]<<"'"<<endl; |
138435cb BH |
3622 | } |
3623 | ||
f0f3f0b0 PL |
3624 | s_pidfname=::arg()["socket-dir"]+"/"+s_programname+".pid"; |
3625 | if(!s_pidfname.empty()) | |
3626 | unlink(s_pidfname.c_str()); // remove possible old pid file | |
3627 | writePid(); | |
3628 | ||
3629 | makeControlChannelSocket( ::arg().asNum("processes") > 1 ? forks : -1); | |
3630 | ||
f1d6a7ce | 3631 | Utility::dropUserPrivs(newuid); |
c0063e60 | 3632 | |
e6ec15bf RG |
3633 | startLuaConfigDelayedThreads(delayedLuaThreads, g_luaconfs.getCopy().generation); |
3634 | ||
49a699c4 | 3635 | makeThreadPipes(); |
3ddb9247 | 3636 | |
5d4dd7fe BH |
3637 | g_tcpTimeout=::arg().asNum("client-tcp-timeout"); |
3638 | g_maxTCPPerClient=::arg().asNum("max-tcp-per-client"); | |
fde296a3 | 3639 | g_tcpMaxQueriesPerConn=::arg().asNum("max-tcp-queries-per-connection"); |
a5886e6a | 3640 | s_maxUDPQueriesPerRound=::arg().asNum("max-udp-queries-per-round"); |
343257a4 | 3641 | |
d705aad9 RG |
3642 | if (::arg().mustDo("snmp-agent")) { |
3643 | g_snmpAgent = std::make_shared<RecursorSNMPAgent>("recursor", ::arg()["snmp-master-socket"]); | |
3644 | g_snmpAgent->run(); | |
3645 | } | |
3646 | ||
b47026fd | 3647 | int port = ::arg().asNum("udp-source-port-min"); |
58da9034 | 3648 | if(port < 1024 || port > 65535){ |
e6a9dde5 | 3649 | g_log<<Logger::Error<<"Unable to launch, udp-source-port-min is not a valid port number"<<endl; |
bf6f28ca CHB |
3650 | exit(99); // this isn't going to fix itself either |
3651 | } | |
3652 | s_minUdpSourcePort = port; | |
b47026fd | 3653 | port = ::arg().asNum("udp-source-port-max"); |
58da9034 | 3654 | if(port < 1024 || port > 65535 || port < s_minUdpSourcePort){ |
e6a9dde5 | 3655 | g_log<<Logger::Error<<"Unable to launch, udp-source-port-max is not a valid port number or is smaller than udp-source-port-min"<<endl; |
bf6f28ca CHB |
3656 | exit(99); // this isn't going to fix itself either |
3657 | } | |
3658 | s_maxUdpSourcePort = port; | |
3659 | std::vector<string> parts {}; | |
b47026fd | 3660 | stringtok(parts, ::arg()["udp-source-port-avoid"], ", "); |
bf6f28ca CHB |
3661 | for (const auto &part : parts) |
3662 | { | |
3663 | port = std::stoi(part); | |
58da9034 | 3664 | if(port < 1024 || port > 65535){ |
e6a9dde5 | 3665 | g_log<<Logger::Error<<"Unable to launch, udp-source-port-avoid contains an invalid port number: "<<part<<endl; |
bf6f28ca CHB |
3666 | exit(99); // this isn't going to fix itself either |
3667 | } | |
3668 | s_avoidUdpSourcePorts.insert(port); | |
3669 | } | |
3670 | ||
b243ca3b | 3671 | unsigned int currentThreadId = 1; |
8fd25133 | 3672 | const auto cpusMap = parseCPUMap(); |
d77abca1 | 3673 | |
c3828c03 | 3674 | if(g_numThreads == 1) { |
e6a9dde5 | 3675 | g_log<<Logger::Warning<<"Operating unthreaded"<<endl; |
6b6720de PL |
3676 | #ifdef HAVE_SYSTEMD |
3677 | sd_notify(0, "READY=1"); | |
3678 | #endif | |
b243ca3b RG |
3679 | |
3680 | /* This thread handles the web server, carbon, statistics and the control channel */ | |
3681 | auto& handlerInfos = s_threadInfos.at(0); | |
3682 | handlerInfos.isHandler = true; | |
3683 | handlerInfos.thread = std::thread(recursorThread, 0); | |
3684 | ||
3685 | setCPUMap(cpusMap, currentThreadId, pthread_self()); | |
3686 | ||
3687 | auto& infos = s_threadInfos.at(currentThreadId); | |
3688 | infos.isListener = true; | |
3689 | infos.isWorker = true; | |
3690 | recursorThread(currentThreadId++); | |
76698c6e BH |
3691 | } |
3692 | else { | |
8fd25133 | 3693 | |
b243ca3b RG |
3694 | if (g_weDistributeQueries) { |
3695 | g_log<<Logger::Warning<<"Launching "<< g_numDistributorThreads <<" distributor threads"<<endl; | |
3696 | for(unsigned int n=0; n < g_numDistributorThreads; ++n) { | |
3697 | auto& infos = s_threadInfos.at(currentThreadId); | |
3698 | infos.isListener = true; | |
3699 | infos.thread = std::thread(recursorThread, currentThreadId++); | |
3700 | ||
3701 | setCPUMap(cpusMap, currentThreadId, infos.thread.native_handle()); | |
3702 | } | |
3703 | } | |
8fd25133 | 3704 | |
62b549e0 RG |
3705 | g_log<<Logger::Warning<<"Launching "<< g_numWorkerThreads <<" worker threads"<<endl; |
3706 | ||
b243ca3b RG |
3707 | for(unsigned int n=0; n < g_numWorkerThreads; ++n) { |
3708 | auto& infos = s_threadInfos.at(currentThreadId); | |
3709 | infos.isListener = g_weDistributeQueries ? false : true; | |
3710 | infos.isWorker = true; | |
3711 | infos.thread = std::thread(recursorThread, currentThreadId++); | |
3712 | ||
3713 | setCPUMap(cpusMap, currentThreadId, infos.thread.native_handle()); | |
76698c6e | 3714 | } |
b243ca3b | 3715 | |
6b6720de PL |
3716 | #ifdef HAVE_SYSTEMD |
3717 | sd_notify(0, "READY=1"); | |
3718 | #endif | |
b243ca3b RG |
3719 | |
3720 | /* This thread handles the web server, carbon, statistics and the control channel */ | |
3721 | auto& infos = s_threadInfos.at(0); | |
3722 | infos.isHandler = true; | |
3723 | infos.thread = std::thread(recursorThread, 0); | |
3724 | ||
3725 | s_threadInfos.at(0).thread.join(); | |
bb4bdbaf | 3726 | } |
bb4bdbaf BH |
3727 | return 0; |
3728 | } | |
3729 | ||
b243ca3b | 3730 | static void* recursorThread(unsigned int n) |
bb4bdbaf BH |
3731 | try |
3732 | { | |
d77abca1 | 3733 | t_id=n; |
b243ca3b | 3734 | auto& threadInfo = s_threadInfos.at(t_id); |
49a699c4 | 3735 | SyncRes tmp(g_now); // make sure it allocates tsstorage before we do anything, like primeHints or so.. |
a712cb56 | 3736 | SyncRes::setDomainMap(g_initialDomainMap); |
49a699c4 | 3737 | t_allowFrom = g_initialAllowFrom; |
f26bf547 RG |
3738 | t_udpclientsocks = std::unique_ptr<UDPClientSocks>(new UDPClientSocks()); |
3739 | t_tcpClientCounts = std::unique_ptr<tcpClientCounts_t>(new tcpClientCounts_t()); | |
49a699c4 | 3740 | primeHints(); |
3ddb9247 | 3741 | |
f26bf547 | 3742 | t_packetCache = std::unique_ptr<RecursorPacketCache>(new RecursorPacketCache()); |
3ddb9247 | 3743 | |
aa7929a3 | 3744 | #ifdef HAVE_PROTOBUF |
f26bf547 | 3745 | t_uuidGenerator = std::unique_ptr<boost::uuids::random_generator>(new boost::uuids::random_generator()); |
aa7929a3 | 3746 | #endif |
e6a9dde5 | 3747 | g_log<<Logger::Warning<<"Done priming cache with root hints"<<endl; |
3ddb9247 | 3748 | |
af1377b7 NC |
3749 | #ifdef NOD_ENABLED |
3750 | setupNODThread(); | |
3751 | #endif /* NOD_ENABLED */ | |
3752 | ||
8fb594ba | 3753 | if(threadInfo.isWorker) { |
5b388d28 PD |
3754 | try { |
3755 | if(!::arg()["lua-dns-script"].empty()) { | |
3756 | t_pdl = std::make_shared<RecursorLua4>(); | |
3757 | t_pdl->loadFile(::arg()["lua-dns-script"]); | |
3758 | g_log<<Logger::Warning<<"Loaded 'lua' script from '"<<::arg()["lua-dns-script"]<<"'"<<endl; | |
3759 | } | |
3760 | } | |
3761 | catch(std::exception &e) { | |
3762 | g_log<<Logger::Error<<"Failed to load 'lua' script from '"<<::arg()["lua-dns-script"]<<"': "<<e.what()<<endl; | |
3763 | _exit(99); | |
674cf0f6 | 3764 | } |
674cf0f6 | 3765 | } |
3ddb9247 | 3766 | |
f8f243b0 | 3767 | unsigned int ringsize=::arg().asNum("stats-ringbuffer-entries") / g_numWorkerThreads; |
92011b8f | 3768 | if(ringsize) { |
f26bf547 | 3769 | t_remotes = std::unique_ptr<addrringbuf_t>(new addrringbuf_t()); |
b243ca3b RG |
3770 | if(g_weDistributeQueries) |
3771 | t_remotes->set_capacity(::arg().asNum("stats-ringbuffer-entries") / g_numDistributorThreads); | |
f8f243b0 | 3772 | else |
3ddb9247 | 3773 | t_remotes->set_capacity(ringsize); |
f26bf547 | 3774 | t_servfailremotes = std::unique_ptr<addrringbuf_t>(new addrringbuf_t()); |
3ddb9247 | 3775 | t_servfailremotes->set_capacity(ringsize); |
66f2e6ad KM |
3776 | t_bogusremotes = std::unique_ptr<addrringbuf_t>(new addrringbuf_t()); |
3777 | t_bogusremotes->set_capacity(ringsize); | |
f26bf547 | 3778 | t_largeanswerremotes = std::unique_ptr<addrringbuf_t>(new addrringbuf_t()); |
3ddb9247 | 3779 | t_largeanswerremotes->set_capacity(ringsize); |
621ccf89 | 3780 | t_timeouts = std::unique_ptr<addrringbuf_t>(new addrringbuf_t()); |
3781 | t_timeouts->set_capacity(ringsize); | |
92011b8f | 3782 | |
f26bf547 | 3783 | t_queryring = std::unique_ptr<boost::circular_buffer<pair<DNSName, uint16_t> > >(new boost::circular_buffer<pair<DNSName, uint16_t> >()); |
3ddb9247 | 3784 | t_queryring->set_capacity(ringsize); |
f26bf547 | 3785 | t_servfailqueryring = std::unique_ptr<boost::circular_buffer<pair<DNSName, uint16_t> > >(new boost::circular_buffer<pair<DNSName, uint16_t> >()); |
3ddb9247 | 3786 | t_servfailqueryring->set_capacity(ringsize); |
66f2e6ad KM |
3787 | t_bogusqueryring = std::unique_ptr<boost::circular_buffer<pair<DNSName, uint16_t> > >(new boost::circular_buffer<pair<DNSName, uint16_t> >()); |
3788 | t_bogusqueryring->set_capacity(ringsize); | |
92011b8f | 3789 | } |
3ddb9247 | 3790 | |
f26bf547 | 3791 | MT=std::unique_ptr<MTasker<PacketID,string> >(new MTasker<PacketID,string>(::arg().asNum("stack-size"))); |
3ddb9247 | 3792 | |
63341e8d RG |
3793 | #ifdef HAVE_PROTOBUF |
3794 | /* start protobuf export threads if needed */ | |
3795 | auto luaconfsLocal = g_luaconfs.getLocal(); | |
3796 | checkProtobufExport(luaconfsLocal); | |
3797 | checkOutgoingProtobufExport(luaconfsLocal); | |
3798 | #endif /* HAVE_PROTOBUF */ | |
3799 | ||
bb4bdbaf BH |
3800 | PacketID pident; |
3801 | ||
3802 | t_fdm=getMultiplexer(); | |
d77abca1 | 3803 | |
b243ca3b | 3804 | if(threadInfo.isHandler) { |
d07bf7ff | 3805 | if(::arg().mustDo("webserver")) { |
e6a9dde5 | 3806 | g_log<<Logger::Warning << "Enabling web server" << endl; |
8989097d | 3807 | try { |
1ce57618 | 3808 | new RecursorWebServer(t_fdm); |
8989097d CH |
3809 | } |
3810 | catch(PDNSException &e) { | |
e6a9dde5 | 3811 | g_log<<Logger::Error<<"Exception: "<<e.reason<<endl; |
8989097d CH |
3812 | exit(99); |
3813 | } | |
f3d1d67b | 3814 | } |
e6a9dde5 | 3815 | g_log<<Logger::Error<<"Enabled '"<< t_fdm->getName() << "' multiplexer"<<endl; |
f3d1d67b | 3816 | } |
810ff705 | 3817 | else { |
d77abca1 | 3818 | |
b243ca3b RG |
3819 | t_fdm->addReadFD(threadInfo.pipes.readToThread, handlePipeRequest); |
3820 | t_fdm->addReadFD(threadInfo.pipes.readQueriesToThread, handlePipeRequest); | |
3821 | ||
3822 | if (threadInfo.isListener) { | |
3823 | if (g_reusePort) { | |
3824 | /* then every listener has its own FDs */ | |
3825 | for(const auto deferred : threadInfo.deferredAdds) { | |
3826 | t_fdm->addReadFD(deferred.first, deferred.second); | |
3827 | } | |
810ff705 | 3828 | } |
b243ca3b RG |
3829 | else { |
3830 | /* otherwise all listeners are listening on the same ones */ | |
3831 | for(const auto deferred : g_deferredAdds) { | |
3832 | t_fdm->addReadFD(deferred.first, deferred.second); | |
d77abca1 RG |
3833 | } |
3834 | } | |
3835 | } | |
810ff705 | 3836 | } |
3ddb9247 | 3837 | |
b0b37121 | 3838 | registerAllStats(); |
d77abca1 | 3839 | |
b243ca3b | 3840 | if(threadInfo.isHandler) { |
674cf0f6 BH |
3841 | t_fdm->addReadFD(s_rcc.d_fd, handleRCC); // control channel |
3842 | } | |
1bc3c142 | 3843 | |
f7c1d4e3 | 3844 | unsigned int maxTcpClients=::arg().asNum("max-tcp-clients"); |
3ddb9247 | 3845 | |
f7c1d4e3 | 3846 | bool listenOnTCP(true); |
49a699c4 | 3847 | |
cb1523d1 | 3848 | time_t last_stat = 0; |
a2f87dd1 | 3849 | time_t last_carbon=0, last_lua_maintenance=0; |
2c78bd57 | 3850 | time_t carbonInterval=::arg().asNum("carbon-interval"); |
a2f87dd1 | 3851 | time_t luaMaintenanceInterval=::arg().asNum("lua-maintenance-interval"); |
ac0995bb | 3852 | counter.store(0); // used to periodically execute certain tasks |
f7c1d4e3 | 3853 | for(;;) { |
ac0e821b | 3854 | while(MT->schedule(&g_now)); // MTasker letting the mthreads do their thing |
3ddb9247 | 3855 | |
3427fa8a BH |
3856 | if(!(counter%500)) { |
3857 | MT->makeThread(houseKeeping, 0); | |
f7c1d4e3 BH |
3858 | } |
3859 | ||
d2392145 | 3860 | if(!(counter%55)) { |
d8f6d49f | 3861 | typedef vector<pair<int, FDMultiplexer::funcparam_t> > expired_t; |
bb4bdbaf | 3862 | expired_t expired=t_fdm->getTimeouts(g_now); |
3ddb9247 | 3863 | |
f7c1d4e3 | 3864 | for(expired_t::iterator i=expired.begin() ; i != expired.end(); ++i) { |
cd989c87 | 3865 | shared_ptr<TCPConnection> conn=any_cast<shared_ptr<TCPConnection> >(i->second); |
4957a608 | 3866 | if(g_logCommonErrors) |
e6a9dde5 | 3867 | g_log<<Logger::Warning<<"Timeout from remote TCP client "<< conn->d_remote.toStringWithPort() <<endl; |
4957a608 | 3868 | t_fdm->removeReadFD(i->first); |
f7c1d4e3 BH |
3869 | } |
3870 | } | |
3ddb9247 | 3871 | |
f7c1d4e3 BH |
3872 | counter++; |
3873 | ||
b243ca3b | 3874 | if(threadInfo.isHandler) { |
cb1523d1 RG |
3875 | if(statsWanted || (g_statisticsInterval > 0 && (g_now.tv_sec - last_stat) >= g_statisticsInterval)) { |
3876 | doStats(); | |
3877 | last_stat = g_now.tv_sec; | |
3878 | } | |
f7c1d4e3 | 3879 | |
cb1523d1 | 3880 | Utility::gettimeofday(&g_now, 0); |
2c78bd57 | 3881 | |
cb1523d1 RG |
3882 | if((g_now.tv_sec - last_carbon) >= carbonInterval) { |
3883 | MT->makeThread(doCarbonDump, 0); | |
3884 | last_carbon = g_now.tv_sec; | |
3885 | } | |
2c78bd57 | 3886 | } |
2a0276a9 | 3887 | if (t_pdl != nullptr) { |
9adbe790 | 3888 | // lua-dns-script directive is present, call the maintenance callback if needed |
b243ca3b | 3889 | if (threadInfo.isWorker) { |
2a0276a9 CHB |
3890 | // Only on threads processing queries |
3891 | if(g_now.tv_sec - last_lua_maintenance >= luaMaintenanceInterval) { | |
3892 | t_pdl->maintenance(); | |
3893 | last_lua_maintenance = g_now.tv_sec; | |
3894 | } | |
9adbe790 | 3895 | } |
a2f87dd1 | 3896 | } |
2c78bd57 | 3897 | |
bb4bdbaf | 3898 | t_fdm->run(&g_now); |
3ea54bf0 | 3899 | // 'run' updates g_now for us |
f7c1d4e3 | 3900 | |
b243ca3b | 3901 | if(threadInfo.isListener) { |
5c889cf5 | 3902 | if(listenOnTCP) { |
c47f201b RG |
3903 | if(TCPConnection::getCurrentConnections() > maxTcpClients) { // shutdown, too many connections |
3904 | for(const auto fd : threadInfo.tcpSockets) { | |
3905 | t_fdm->removeReadFD(fd); | |
b243ca3b | 3906 | } |
c47f201b RG |
3907 | listenOnTCP=false; |
3908 | } | |
f7c1d4e3 | 3909 | } |
5c889cf5 | 3910 | else { |
c47f201b RG |
3911 | if(TCPConnection::getCurrentConnections() <= maxTcpClients) { // reenable |
3912 | for(const auto fd : threadInfo.tcpSockets) { | |
3913 | t_fdm->addReadFD(fd, handleNewTCPQuestion); | |
b243ca3b | 3914 | } |
c47f201b RG |
3915 | listenOnTCP=true; |
3916 | } | |
f7c1d4e3 BH |
3917 | } |
3918 | } | |
3919 | } | |
3920 | } | |
3f81d239 | 3921 | catch(PDNSException &ae) { |
e6a9dde5 | 3922 | g_log<<Logger::Error<<"Exception: "<<ae.reason<<endl; |
bb4bdbaf BH |
3923 | return 0; |
3924 | } | |
3925 | catch(std::exception &e) { | |
e6a9dde5 | 3926 | g_log<<Logger::Error<<"STL Exception: "<<e.what()<<endl; |
bb4bdbaf BH |
3927 | return 0; |
3928 | } | |
3929 | catch(...) { | |
e6a9dde5 | 3930 | g_log<<Logger::Error<<"any other exception in main: "<<endl; |
bb4bdbaf BH |
3931 | return 0; |
3932 | } | |
3933 | ||
51e2144e | 3934 | |
3ddb9247 | 3935 | int main(int argc, char **argv) |
288f4aa9 | 3936 | { |
dbd23fc2 BH |
3937 | g_argc = argc; |
3938 | g_argv = argv; | |
5e3de507 | 3939 | g_stats.startupTime=time(0); |
3e135495 | 3940 | versionSetProduct(ProductRecursor); |
8a63d3ce | 3941 | reportBasicTypes(); |
0007c2e5 | 3942 | reportOtherTypes(); |
ea634573 | 3943 | |
22030c37 | 3944 | int ret = EXIT_SUCCESS; |
caa6eefa | 3945 | |
288f4aa9 | 3946 | try { |
f888311c | 3947 | ::arg().set("stack-size","stack size per mthread")="200000"; |
2e3d8a19 | 3948 | ::arg().set("soa-minimum-ttl","Don't change")="0"; |
2e3d8a19 | 3949 | ::arg().set("no-shuffle","Don't change")="off"; |
2e3d8a19 | 3950 | ::arg().set("local-port","port to listen on")="53"; |
32252594 | 3951 | ::arg().set("local-address","IP addresses to listen on, separated by spaces or commas. Also accepts ports.")="127.0.0.1"; |
fec7dd5a | 3952 | ::arg().setSwitch("non-local-bind", "Enable binding to non-local addresses by using FREEBIND / BINDANY socket options")="no"; |
77499b05 | 3953 | ::arg().set("trace","if we should output heaps of logging. set to 'fail' to only log failing domains")="off"; |
a6415142 | 3954 | ::arg().set("dnssec", "DNSSEC mode: off/process-no-validate (default)/process/log-fail/validate")="process-no-validate"; |
c87e1876 | 3955 | ::arg().set("dnssec-log-bogus", "Log DNSSEC bogus validations")="no"; |
d3f809bf | 3956 | ::arg().set("daemon","Operate as a daemon")="no"; |
191f2e47 | 3957 | ::arg().setSwitch("write-pid","Write a PID file")="yes"; |
9afa8662 | 3958 | ::arg().set("loglevel","Amount of logging. Higher is more. Do not set below 3")="6"; |
b6cfa948 | 3959 | ::arg().set("disable-syslog","Disable logging to syslog, useful when running inside a supervisor that logs stdout")="no"; |
b18fa400 | 3960 | ::arg().set("log-timestamp","Print timestamps in log lines, useful to disable when running with a tool that timestamps stdout already")="yes"; |
22e0810c | 3961 | ::arg().set("log-common-errors","If we should log rather common errors")="no"; |
2e3d8a19 BH |
3962 | ::arg().set("chroot","switch to chroot jail")=""; |
3963 | ::arg().set("setgid","If set, change group id to this gid for more security")=""; | |
3964 | ::arg().set("setuid","If set, change user id to this uid for more security")=""; | |
c83ee49d | 3965 | ::arg().set("network-timeout", "Wait this number of milliseconds for network i/o")="1500"; |
bb4bdbaf | 3966 | ::arg().set("threads", "Launch this number of threads")="2"; |
b243ca3b | 3967 | ::arg().set("distributor-threads", "Launch this number of distributor threads, distributing queries to other threads")="0"; |
adabfcb9 | 3968 | ::arg().set("processes", "Launch this number of processes (EXPERIMENTAL, DO NOT CHANGE)")="1"; // if we un-experimental this, need to fix openssl rand seeding for multiple PIDs! |
5124de27 | 3969 | ::arg().set("config-name","Name of this virtual configuration - will rename the binary image")=""; |
d07bf7ff | 3970 | ::arg().set("api-config-dir", "Directory where REST API stores config and zones") = ""; |
479e0976 CH |
3971 | ::arg().set("api-key", "Static pre-shared authentication key for access to the REST API") = ""; |
3972 | ::arg().set("api-logfile", "Location of the server logfile (used by the REST API)") = "/var/log/pdns.log"; | |
479e0976 | 3973 | ::arg().setSwitch("webserver", "Start a webserver (for REST API)") = "no"; |
d07bf7ff PL |
3974 | ::arg().set("webserver-address", "IP Address of webserver to listen on") = "127.0.0.1"; |
3975 | ::arg().set("webserver-port", "Port of webserver to listen on") = "8082"; | |
3976 | ::arg().set("webserver-password", "Password required for accessing the webserver") = ""; | |
be3e1477 | 3977 | ::arg().set("webserver-allow-from","Webserver access is only allowed from these subnets")="127.0.0.1,::1"; |
cc08b5a9 | 3978 | ::arg().set("carbon-ourname", "If set, overrides our reported hostname for carbon stats")=""; |
e12f8407 | 3979 | ::arg().set("carbon-server", "If set, send metrics in carbon (graphite) format to this server IP address")=""; |
2c78bd57 | 3980 | ::arg().set("carbon-interval", "Number of seconds between carbon (graphite) updates")="30"; |
0ec489bf | 3981 | ::arg().set("statistics-interval", "Number of seconds between printing of recursor statistics, 0 to disable")="1800"; |
c038218b | 3982 | ::arg().set("quiet","Suppress logging of questions and answers")=""; |
f27e6356 | 3983 | ::arg().set("logging-facility","Facility to log messages as. 0 corresponds to local0")=""; |
2e3d8a19 | 3984 | ::arg().set("config-dir","Location of configuration directory (recursor.conf)")=SYSCONFDIR; |
fdbf35ac BH |
3985 | ::arg().set("socket-owner","Owner of socket")=""; |
3986 | ::arg().set("socket-group","Group of socket")=""; | |
3987 | ::arg().set("socket-mode", "Permissions for socket")=""; | |
3ddb9247 | 3988 | |
f0f3f0b0 | 3989 | ::arg().set("socket-dir",string("Where the controlsocket will live, ")+LOCALSTATEDIR+" when unset and not chrooted" )=""; |
2e3d8a19 BH |
3990 | ::arg().set("delegation-only","Which domains we only accept delegations from")=""; |
3991 | ::arg().set("query-local-address","Source IP address for sending queries")="0.0.0.0"; | |
d4fb76e9 | 3992 | ::arg().set("query-local-address6","Source IPv6 address for sending queries. IF UNSET, IPv6 WILL NOT BE USED FOR OUTGOING QUERIES")=""; |
2e3d8a19 | 3993 | ::arg().set("client-tcp-timeout","Timeout in seconds when talking to TCP clients")="2"; |
85c32340 | 3994 | ::arg().set("max-mthreads", "Maximum number of simultaneous Mtasker threads")="2048"; |
2e3d8a19 | 3995 | ::arg().set("max-tcp-clients","Maximum number of simultaneous TCP clients")="128"; |
324dc148 | 3996 | ::arg().set("server-down-max-fails","Maximum number of consecutive timeouts (and unreachables) to mark a server as down ( 0 => disabled )")="64"; |
979edd70 | 3997 | ::arg().set("server-down-throttle-time","Number of seconds to throttle all queries to a server after being marked as down")="60"; |
2e3d8a19 | 3998 | ::arg().set("hint-file", "If set, load root hints from this file")=""; |
b45eb27c | 3999 | ::arg().set("max-cache-entries", "If set, maximum number of entries in the main cache")="1000000"; |
a9af3782 | 4000 | ::arg().set("max-negative-ttl", "maximum number of seconds to keep a negative cached entry in memory")="3600"; |
c3e753c7 | 4001 | ::arg().set("max-cache-ttl", "maximum number of seconds to keep a cached entry in memory")="86400"; |
1051f8a9 | 4002 | ::arg().set("packetcache-ttl", "maximum number of seconds to keep a cached entry in packetcache")="3600"; |
927c12b0 | 4003 | ::arg().set("max-packetcache-entries", "maximum number of entries to keep in the packetcache")="500000"; |
1051f8a9 | 4004 | ::arg().set("packetcache-servfail-ttl", "maximum number of seconds to keep a cached servfail entry in packetcache")="60"; |
950626be | 4005 | ::arg().set("server-id", "Returned when queried for 'id.server' TXT or NSID, defaults to hostname, set custom or 'disabled'")=""; |
92011b8f | 4006 | ::arg().set("stats-ringbuffer-entries", "maximum number of packets to store statistics for")="10000"; |
ba1a571d | 4007 | ::arg().set("version-string", "string reported on version.pdns or version.bind")=fullVersionString(); |
49a699c4 | 4008 | ::arg().set("allow-from", "If set, only allow these comma separated netmasks to recurse")=LOCAL_NETS; |
2c95fc65 | 4009 | ::arg().set("allow-from-file", "If set, load allowed netmasks from this file")=""; |
51e2144e | 4010 | ::arg().set("entropy-source", "If set, read entropy from this file")="/dev/urandom"; |
3ddb9247 | 4011 | ::arg().set("dont-query", "If set, do not query these netmasks for DNS data")=DONT_QUERY; |
4e120339 | 4012 | ::arg().set("max-tcp-per-client", "If set, maximum number of TCP sessions per client (IP address)")="0"; |
fde296a3 | 4013 | ::arg().set("max-tcp-queries-per-connection", "If set, maximum number of TCP queries in a TCP connection")="0"; |
0d5f0a9f | 4014 | ::arg().set("spoof-nearmiss-max", "If non-zero, assume spoofing after this many near misses")="20"; |
4ef015cd | 4015 | ::arg().set("single-socket", "If set, only use a single socket for outgoing queries")="off"; |
5605c067 | 4016 | ::arg().set("auth-zones", "Zones for which we have authoritative data, comma separated domain=file pairs ")=""; |
3e61e7f7 | 4017 | ::arg().set("lua-config-file", "More powerful configuration options")=""; |
644dd1da | 4018 | |
5605c067 | 4019 | ::arg().set("forward-zones", "Zones for which we forward queries, comma separated domain=ip pairs")=""; |
927c12b0 BH |
4020 | ::arg().set("forward-zones-recurse", "Zones for which we forward queries with recursion bit, comma separated domain=ip pairs")=""; |
4021 | ::arg().set("forward-zones-file", "File with (+)domain=ip pairs for forwarding")=""; | |
5605c067 | 4022 | ::arg().set("export-etc-hosts", "If we should serve up contents from /etc/hosts")="off"; |
ac0b4eb3 | 4023 | ::arg().set("export-etc-hosts-search-suffix", "Also serve up the contents of /etc/hosts with this suffix")=""; |
3ea54bf0 | 4024 | ::arg().set("etc-hosts-file", "Path to 'hosts' file")="/etc/hosts"; |
e498dac1 | 4025 | ::arg().set("serve-rfc1918", "If we should be authoritative for RFC 1918 private IP space")="yes"; |
4485aa35 | 4026 | ::arg().set("lua-dns-script", "Filename containing an optional 'lua' script that will be used to modify dns answers")=""; |
a2f87dd1 | 4027 | ::arg().set("lua-maintenance-interval", "Number of seconds between calls to the lua user defined maintenance() function")="1"; |
08f3f638 | 4028 | ::arg().set("latency-statistic-size","Number of latency values to calculate the qa-latency average")="10000"; |
3ddb9247 | 4029 | ::arg().setSwitch( "disable-packetcache", "Disable packetcache" )= "no"; |
35695d18 | 4030 | ::arg().set("ecs-ipv4-bits", "Number of bits of IPv4 address to pass for EDNS Client Subnet")="24"; |
4031 | ::arg().set("ecs-ipv6-bits", "Number of bits of IPv6 address to pass for EDNS Client Subnet")="56"; | |
3f975863 | 4032 | ::arg().set("edns-subnet-whitelist", "List of netmasks and domains that we should enable EDNS subnet for")=""; |
2fe3354d | 4033 | ::arg().set("ecs-add-for", "List of client netmasks for which EDNS Client Subnet will be added")="0.0.0.0/0, ::/0, " LOCAL_NETS_INVERSE; |
8a3a3822 | 4034 | ::arg().set("ecs-scope-zero-address", "Address to send to whitelisted authoritative servers for incoming queries with ECS prefix-length source of 0")=""; |
a16c4536 | 4035 | ::arg().setSwitch( "use-incoming-edns-subnet", "Pass along received EDNS Client Subnet information")="no"; |
e498dac1 | 4036 | ::arg().setSwitch( "pdns-distributes-queries", "If PowerDNS itself should distribute queries over threads")="yes"; |
4ca2d205 | 4037 | ::arg().setSwitch( "root-nx-trust", "If set, believe that an NXDOMAIN from the root means the TLD does not exist")="yes"; |
e661a20b | 4038 | ::arg().setSwitch( "any-to-tcp","Answer ANY queries with tc=1, shunting to TCP" )="no"; |
b3adda56 | 4039 | ::arg().setSwitch( "lowercase-outgoing","Force outgoing questions to lowercase")="no"; |
00b8cadc | 4040 | ::arg().setSwitch("gettag-needs-edns-options", "If EDNS Options should be extracted before calling the gettag() hook")="no"; |
a09a8ce0 | 4041 | ::arg().set("udp-truncation-threshold", "Maximum UDP response size before we truncate")="1680"; |
b33c2462 | 4042 | ::arg().set("edns-outgoing-bufsize", "Outgoing EDNS buffer size")="1680"; |
aadceba8 | 4043 | ::arg().set("minimum-ttl-override", "Set under adverse conditions, a minimum TTL")="0"; |
173d790e | 4044 | ::arg().set("max-qperq", "Maximum outgoing queries per query")="50"; |
c5950146 | 4045 | ::arg().set("max-total-msec", "Maximum total wall-clock time per query in milliseconds, 0 for unlimited")="7000"; |
7c3398aa | 4046 | ::arg().set("max-recursion-depth", "Maximum number of internal recursion calls per query, 0 for unlimited")="40"; |
78227847 | 4047 | ::arg().set("max-udp-queries-per-round", "Maximum number of UDP queries processed per recvmsg() round, before returning back to normal processing")="10000"; |
a09a8ce0 | 4048 | |
68e6df3c | 4049 | ::arg().set("include-dir","Include *.conf files from this directory")=""; |
d67620e4 | 4050 | ::arg().set("security-poll-suffix","Domain name from which to query security update notifications")="secpoll.powerdns.com."; |
2332f42d | 4051 | |
4052 | ::arg().setSwitch("reuseport","Enable SO_REUSEPORT allowing multiple recursors processes to listen to 1 address")="no"; | |
2e3d8a19 | 4053 | |
d705aad9 | 4054 | ::arg().setSwitch("snmp-agent", "If set, register as an SNMP agent")="no"; |
396f126e | 4055 | ::arg().set("snmp-master-socket", "If set and snmp-agent is set, the socket to use to register to the SNMP master")=""; |
d705aad9 | 4056 | |
0735b17e | 4057 | ::arg().set("tcp-fast-open", "Enable TCP Fast Open support on the listening sockets, using the supplied numerical value as the queue size")="0"; |
d377bb54 | 4058 | ::arg().set("nsec3-max-iterations", "Maximum number of iterations allowed for an NSEC3 record")="2500"; |
0735b17e | 4059 | |
8fd25133 RG |
4060 | ::arg().set("cpu-map", "Thread to CPU mapping, space separated thread-id=cpu1,cpu2..cpuN pairs")=""; |
4061 | ||
98d36505 RG |
4062 | ::arg().setSwitch("log-rpz-changes", "Log additions and removals to RPZ zones at Info level")="no"; |
4063 | ||
5cc8371b | 4064 | ::arg().set("xpf-allow-from","XPF information is only processed from these subnets")=""; |
59cb4a79 | 4065 | ::arg().set("xpf-rr-code","XPF option code to use")="0"; |
5cc8371b | 4066 | |
58da9034 | 4067 | ::arg().set("udp-source-port-min", "Minimum UDP port to bind on")="1024"; |
b47026fd CHB |
4068 | ::arg().set("udp-source-port-max", "Maximum UDP port to bind on")="65535"; |
4069 | ::arg().set("udp-source-port-avoid", "List of comma separated UDP port number to avoid")="11211"; | |
e97cb679 | 4070 | ::arg().set("rng", "Specify random number generator to use. Valid values are auto,sodium,openssl,getrandom,arc4random,urandom.")="auto"; |
af1377b7 NC |
4071 | #ifdef NOD_ENABLED |
4072 | ::arg().set("new-domain-tracking", "Track newly observed domains (i.e. never seen before).")="no"; | |
4073 | ::arg().set("new-domain-log", "Log newly observed domains.")="yes"; | |
4074 | ::arg().set("new-domain-lookup", "Perform a DNS lookup newly observed domains as a subdomain of the configured domain")=""; | |
4075 | ::arg().set("new-domain-history-dir", "Persist new domain tracking data here to persist between restarts")=string(NODCACHEDIR)+"/nod"; | |
4076 | ::arg().set("new-domain-whitelist", "List of domains (and implicitly all subdomains) which will never be considered a new domain")=""; | |
4077 | #endif /* NOD_ENABLED */ | |
2e3d8a19 | 4078 | ::arg().setCmd("help","Provide a helpful message"); |
ba1a571d | 4079 | ::arg().setCmd("version","Print version string"); |
d5141417 | 4080 | ::arg().setCmd("config","Output blank configuration"); |
e6a9dde5 | 4081 | g_log.toConsole(Logger::Info); |
2e3d8a19 | 4082 | ::arg().laxParse(argc,argv); // do a lax parse |
c75a6a9e | 4083 | |
2d733c0f CH |
4084 | string configname=::arg()["config-dir"]+"/recursor.conf"; |
4085 | if(::arg()["config-name"]!="") { | |
4086 | configname=::arg()["config-dir"]+"/recursor-"+::arg()["config-name"]+".conf"; | |
5124de27 | 4087 | s_programname+="-"+::arg()["config-name"]; |
2d733c0f CH |
4088 | } |
4089 | cleanSlashes(configname); | |
5124de27 | 4090 | |
5cc1ea1d CH |
4091 | if(!::arg().getCommands().empty()) { |
4092 | cerr<<"Fatal: non-option on the command line, perhaps a '--setting=123' statement missed the '='?"<<endl; | |
4093 | exit(99); | |
4094 | } | |
4095 | ||
577cf284 BH |
4096 | if(::arg().mustDo("config")) { |
4097 | cout<<::arg().configstring()<<endl; | |
4098 | exit(0); | |
4099 | } | |
4100 | ||
3ddb9247 | 4101 | if(!::arg().file(configname.c_str())) |
e6a9dde5 | 4102 | g_log<<Logger::Warning<<"Unable to parse configuration file '"<<configname<<"'"<<endl; |
c75a6a9e | 4103 | |
2e3d8a19 | 4104 | ::arg().parse(argc,argv); |
c836dc19 | 4105 | |
2054afbb CH |
4106 | if( !::arg()["chroot"].empty() && !::arg()["api-config-dir"].empty() ) { |
4107 | g_log<<Logger::Error<<"Using chroot and enabling the API is not possible"<<endl; | |
f0f3f0b0 PL |
4108 | exit(EXIT_FAILURE); |
4109 | } | |
4110 | ||
4111 | if (::arg()["socket-dir"].empty()) { | |
4112 | if (::arg()["chroot"].empty()) | |
4113 | ::arg().set("socket-dir") = LOCALSTATEDIR; | |
4114 | else | |
4115 | ::arg().set("socket-dir") = "/"; | |
4116 | } | |
4117 | ||
2e3d8a19 | 4118 | ::arg().set("delegation-only")=toLower(::arg()["delegation-only"]); |
562588a3 | 4119 | |
b243ca3b RG |
4120 | if(::arg().asNum("threads")==1) { |
4121 | if (::arg().mustDo("pdns-distributes-queries")) { | |
4122 | g_log<<Logger::Warning<<"Only one thread, no need to distribute queries ourselves"<<endl; | |
4123 | ::arg().set("pdns-distributes-queries")="no"; | |
4124 | } | |
4125 | } | |
4126 | ||
4127 | if(::arg().mustDo("pdns-distributes-queries") && ::arg().asNum("distributor-threads") <= 0) { | |
4128 | g_log<<Logger::Warning<<"Asked to run with pdns-distributes-queries set but no distributor threads, raising to 1"<<endl; | |
4129 | ::arg().set("distributor-threads")="1"; | |
4130 | } | |
4131 | ||
4132 | if (!::arg().mustDo("pdns-distributes-queries")) { | |
4133 | ::arg().set("distributor-threads")="0"; | |
4134 | } | |
61d74169 | 4135 | |
2e3d8a19 | 4136 | if(::arg().mustDo("help")) { |
ff5ba4f9 WA |
4137 | cout<<"syntax:"<<endl<<endl; |
4138 | cout<<::arg().helpstring(::arg()["help"])<<endl; | |
4139 | exit(0); | |
b636533b | 4140 | } |
5e3de507 | 4141 | if(::arg().mustDo("version")) { |
ba1a571d | 4142 | showProductVersion(); |
3613a51c | 4143 | showBuildConfiguration(); |
67076869 | 4144 | exit(0); |
5e3de507 | 4145 | } |
b636533b | 4146 | |
34162f8f | 4147 | Logger::Urgency logUrgency = (Logger::Urgency)::arg().asNum("loglevel"); |
f48d7b65 | 4148 | |
34162f8f CH |
4149 | if (logUrgency < Logger::Error) |
4150 | logUrgency = Logger::Error; | |
f48d7b65 | 4151 | if(!g_quiet && logUrgency < Logger::Info) { // Logger::Info=6, Logger::Debug=7 |
4152 | logUrgency = Logger::Info; // if you do --quiet=no, you need Info to also see the query log | |
4153 | } | |
e6a9dde5 PL |
4154 | g_log.setLoglevel(logUrgency); |
4155 | g_log.toConsole(logUrgency); | |
34162f8f | 4156 | |
f7c1d4e3 | 4157 | serviceMain(argc, argv); |
288f4aa9 | 4158 | } |
3f81d239 | 4159 | catch(PDNSException &ae) { |
e6a9dde5 | 4160 | g_log<<Logger::Error<<"Exception: "<<ae.reason<<endl; |
22030c37 | 4161 | ret=EXIT_FAILURE; |
288f4aa9 | 4162 | } |
fdbf35ac | 4163 | catch(std::exception &e) { |
e6a9dde5 | 4164 | g_log<<Logger::Error<<"STL Exception: "<<e.what()<<endl; |
22030c37 | 4165 | ret=EXIT_FAILURE; |
288f4aa9 BH |
4166 | } |
4167 | catch(...) { | |
e6a9dde5 | 4168 | g_log<<Logger::Error<<"any other exception in main: "<<endl; |
22030c37 | 4169 | ret=EXIT_FAILURE; |
288f4aa9 | 4170 | } |
3ddb9247 | 4171 | |
22030c37 | 4172 | return ret; |
288f4aa9 | 4173 | } |