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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> | |
fa8fd4d2 | 29 | |
2470b36e | 30 | #include "ws-recursor.hh" |
49a699c4 | 31 | #include <pthread.h> |
3ea54bf0 | 32 | #include "recpacketcache.hh" |
3ddb9247 | 33 | #include "utility.hh" |
51e2144e | 34 | #include "dns_random.hh" |
d1b28475 KM |
35 | #ifdef HAVE_LIBSODIUM |
36 | #include <sodium.h> | |
37 | #endif | |
3afde9b2 | 38 | #include "opensslsigners.hh" |
288f4aa9 BH |
39 | #include <iostream> |
40 | #include <errno.h> | |
81859ba5 | 41 | #include <boost/static_assert.hpp> |
288f4aa9 BH |
42 | #include <map> |
43 | #include <set> | |
97bb160b | 44 | #include "recursor_cache.hh" |
38c9ceaa | 45 | #include "cachecleaner.hh" |
288f4aa9 | 46 | #include <stdio.h> |
c75a6a9e | 47 | #include <signal.h> |
288f4aa9 | 48 | #include <stdlib.h> |
bb4bdbaf | 49 | #include "misc.hh" |
288f4aa9 BH |
50 | #include "mtasker.hh" |
51 | #include <utility> | |
288f4aa9 BH |
52 | #include "arguments.hh" |
53 | #include "syncres.hh" | |
88def049 BH |
54 | #include <fcntl.h> |
55 | #include <fstream> | |
3e61e7f7 | 56 | #include "sortlist.hh" |
5c633640 BH |
57 | #include "sstuff.hh" |
58 | #include <boost/tuple/tuple.hpp> | |
59 | #include <boost/tuple/tuple_comparison.hpp> | |
72df400f | 60 | #include <boost/shared_array.hpp> |
7f1fa77d | 61 | #include <boost/function.hpp> |
5605c067 | 62 | #include <boost/algorithm/string.hpp> |
8f7473d7 | 63 | #ifdef MALLOC_TRACE |
64 | #include "malloctrace.hh" | |
65 | #endif | |
40a3dd64 | 66 | #include <netinet/tcp.h> |
ea634573 BH |
67 | #include "dnsparser.hh" |
68 | #include "dnswriter.hh" | |
69 | #include "dnsrecords.hh" | |
f814d7c8 | 70 | #include "zoneparser-tng.hh" |
1d5b3ce6 | 71 | #include "rec_channel.hh" |
aaacf7f2 | 72 | #include "logger.hh" |
c8ddb7c2 | 73 | #include "iputils.hh" |
09e6702a | 74 | #include "mplexer.hh" |
c038218b | 75 | #include "config.h" |
808c5ef7 | 76 | #include "lua-recursor4.hh" |
ba1a571d | 77 | #include "version.hh" |
79332bff | 78 | #include "responsestats.hh" |
d67620e4 | 79 | #include "secpoll-recursor.hh" |
c5c066bf | 80 | #include "dnsname.hh" |
644dd1da | 81 | #include "filterpo.hh" |
82 | #include "rpzloader.hh" | |
b3f0ed10 | 83 | #include "validate-recursor.hh" |
f3c18728 | 84 | #include "rec-lua-conf.hh" |
5c3b5e7f | 85 | #include "ednsoptions.hh" |
85c7ca75 | 86 | #include "gettime.hh" |
f3c18728 | 87 | |
d9d3f9c1 | 88 | #include "rec-protobuf.hh" |
d705aad9 | 89 | #include "rec-snmp.hh" |
aa7929a3 | 90 | |
6b6720de PL |
91 | #ifdef HAVE_SYSTEMD |
92 | #include <systemd/sd-daemon.h> | |
93 | #endif | |
94 | ||
d187038c RG |
95 | #include "namespaces.hh" |
96 | ||
97 | typedef map<ComboAddress, uint32_t, ComboAddress::addressOnlyLessThan> tcpClientCounts_t; | |
98 | ||
f26bf547 RG |
99 | static thread_local std::shared_ptr<RecursorLua4> t_pdl; |
100 | static thread_local unsigned int t_id; | |
101 | static thread_local std::shared_ptr<Regex> t_traceRegex; | |
102 | static thread_local std::unique_ptr<tcpClientCounts_t> t_tcpClientCounts; | |
103 | ||
104 | thread_local std::unique_ptr<MT_t> MT; // the big MTasker | |
105 | thread_local std::unique_ptr<MemRecursorCache> t_RC; | |
106 | thread_local std::unique_ptr<RecursorPacketCache> t_packetCache; | |
3337c2f7 | 107 | thread_local FDMultiplexer* t_fdm{nullptr}; |
f26bf547 RG |
108 | thread_local std::unique_ptr<addrringbuf_t> t_remotes, t_servfailremotes, t_largeanswerremotes; |
109 | thread_local std::unique_ptr<boost::circular_buffer<pair<DNSName, uint16_t> > > t_queryring, t_servfailqueryring; | |
110 | thread_local std::shared_ptr<NetmaskGroup> t_allowFrom; | |
aa7929a3 | 111 | #ifdef HAVE_PROTOBUF |
f26bf547 | 112 | thread_local std::unique_ptr<boost::uuids::random_generator> t_uuidGenerator; |
aa7929a3 | 113 | #endif |
d187038c | 114 | __thread struct timeval g_now; // timestamp, updated (too) frequently |
d7dae798 BH |
115 | |
116 | // for communicating with our threads | |
49a699c4 BH |
117 | struct ThreadPipeSet |
118 | { | |
119 | int writeToThread; | |
120 | int readToThread; | |
121 | int writeFromThread; | |
122 | int readFromThread; | |
123 | }; | |
810ff705 | 124 | |
d187038c RG |
125 | typedef vector<int> tcpListenSockets_t; |
126 | typedef map<int, ComboAddress> listenSocketsAddresses_t; // is shared across all threads right now | |
127 | typedef vector<pair<int, function< void(int, any&) > > > deferredAdd_t; | |
3ea54bf0 | 128 | |
d187038c RG |
129 | static const ComboAddress g_local4("0.0.0.0"), g_local6("::"); |
130 | static vector<ThreadPipeSet> g_pipes; // effectively readonly after startup | |
131 | static tcpListenSockets_t g_tcpListenSockets; // shared across threads, but this is fine, never written to from a thread. All threads listen on all sockets | |
132 | static listenSocketsAddresses_t g_listenSocketsAddresses; // is shared across all threads right now | |
810ff705 | 133 | static std::unordered_map<unsigned int, deferredAdd_t> deferredAdds; |
d187038c RG |
134 | static set<int> g_fromtosockets; // listen sockets that use 'sendfromto()' mechanism |
135 | static vector<ComboAddress> g_localQueryAddresses4, g_localQueryAddresses6; | |
136 | static AtomicCounter counter; | |
9065eb05 | 137 | static std::shared_ptr<SyncRes::domainmap_t> g_initialDomainMap; // new threads needs this to be setup |
f26bf547 | 138 | static std::shared_ptr<NetmaskGroup> g_initialAllowFrom; // new thread needs to be setup with this |
d187038c RG |
139 | static size_t g_tcpMaxQueriesPerConn; |
140 | static uint64_t g_latencyStatSize; | |
141 | static uint32_t g_disthashseed; | |
142 | static unsigned int g_maxTCPPerClient; | |
143 | static unsigned int g_networkTimeoutMsec; | |
144 | static unsigned int g_maxMThreads; | |
145 | static unsigned int g_numWorkerThreads; | |
146 | static int g_tcpTimeout; | |
147 | static uint16_t g_udpTruncationThreshold; | |
148 | static std::atomic<bool> statsWanted; | |
149 | static std::atomic<bool> g_quiet; | |
150 | static bool g_logCommonErrors; | |
151 | static bool g_anyToTcp; | |
d187038c | 152 | static bool g_weDistributeQueries; // if true, only 1 thread listens on the incoming query sockets |
810ff705 RG |
153 | static bool g_reusePort{false}; |
154 | static bool g_useOneSocketPerThread; | |
00b8cadc | 155 | static bool g_gettagNeedsEDNSOptions{false}; |
0ec489bf | 156 | static time_t g_statisticsInterval; |
9065eb05 | 157 | static bool g_useIncomingECS; |
a6f7f5fe | 158 | std::atomic<uint32_t> g_maxCacheEntries, g_maxPacketCacheEntries; |
49a699c4 | 159 | |
d187038c RG |
160 | RecursorControlChannel s_rcc; // only active in thread 0 |
161 | RecursorStats g_stats; | |
2d733c0f | 162 | string s_programname="pdns_recursor"; |
d187038c | 163 | string s_pidfname; |
c1c29961 | 164 | bool g_lowercaseOutgoing; |
d187038c RG |
165 | unsigned int g_numThreads; |
166 | uint16_t g_outgoingEDNSBufsize; | |
98d36505 | 167 | bool g_logRPZChanges{false}; |
c3828c03 | 168 | |
12cd44ee | 169 | #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 | 170 | #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 | 171 | // Bad Nets taken from both: |
3ddb9247 | 172 | // http://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml |
12cd44ee | 173 | // and |
174 | // http://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml | |
175 | // where such a network may not be considered a valid destination | |
176 | #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" | |
177 | #define DONT_QUERY LOCAL_NETS ", " BAD_NETS | |
49a699c4 | 178 | |
d7dae798 | 179 | //! used to send information to a newborn mthread |
ea634573 | 180 | struct DNSComboWriter { |
27c0050c | 181 | DNSComboWriter(const char* data, uint16_t len, const struct timeval& now) : d_mdp(true, data, len), d_now(now), |
232f0877 | 182 | d_tcp(false), d_socket(-1) |
ea634573 BH |
183 | {} |
184 | MOADNSParser d_mdp; | |
00c9b8c1 | 185 | void setRemote(const ComboAddress* sa) |
ea634573 | 186 | { |
37d3f960 | 187 | d_remote=*sa; |
ea634573 BH |
188 | } |
189 | ||
b71b60ee | 190 | void setLocal(const ComboAddress& sa) |
191 | { | |
192 | d_local=sa; | |
193 | } | |
194 | ||
195 | ||
ea634573 BH |
196 | void setSocket(int sock) |
197 | { | |
198 | d_socket=sock; | |
199 | } | |
a1754c6a BH |
200 | |
201 | string getRemote() const | |
202 | { | |
37d3f960 | 203 | return d_remote.toString(); |
a1754c6a BH |
204 | } |
205 | ||
c9e9e5e0 | 206 | struct timeval d_now; |
b71b60ee | 207 | ComboAddress d_remote, d_local; |
aa7929a3 RG |
208 | #ifdef HAVE_PROTOBUF |
209 | boost::uuids::uuid d_uuid; | |
67e31ebe | 210 | string d_requestorId; |
590388d2 | 211 | string d_deviceId; |
aa7929a3 | 212 | #endif |
b40562da RG |
213 | EDNSSubnetOpts d_ednssubnet; |
214 | bool d_ecsFound{false}; | |
215 | bool d_ecsParsed{false}; | |
ea634573 BH |
216 | bool d_tcp; |
217 | int d_socket; | |
b673817a | 218 | unsigned int d_tag{0}; |
e9f63d47 | 219 | uint32_t d_qhash{0}; |
49a3500d | 220 | string d_query; |
cd989c87 | 221 | shared_ptr<TCPConnection> d_tcpConnection; |
e8340d27 | 222 | vector<pair<uint16_t, string> > d_ednsOpts; |
02b47f43 | 223 | std::vector<std::string> d_policyTags; |
5fd2577f | 224 | LuaContext::LuaObject d_data; |
ea634573 BH |
225 | }; |
226 | ||
06857845 RG |
227 | MT_t* getMT() |
228 | { | |
229 | return MT ? MT.get() : nullptr; | |
230 | } | |
ea634573 | 231 | |
288f4aa9 BH |
232 | ArgvMap &arg() |
233 | { | |
234 | static ArgvMap theArg; | |
235 | return theArg; | |
236 | } | |
4ef015cd | 237 | |
b4015453 RG |
238 | unsigned int getRecursorThreadId() |
239 | { | |
240 | return t_id; | |
241 | } | |
09e6702a | 242 | |
30ee601a RG |
243 | int getMTaskerTID() |
244 | { | |
245 | return MT->getTid(); | |
246 | } | |
247 | ||
d187038c | 248 | static void handleTCPClientWritable(int fd, FDMultiplexer::funcparam_t& var); |
09e6702a | 249 | |
50c81227 | 250 | // -1 is error, 0 is timeout, 1 is success |
3ddb9247 | 251 | int asendtcp(const string& data, Socket* sock) |
5c633640 BH |
252 | { |
253 | PacketID pident; | |
254 | pident.sock=sock; | |
255 | pident.outMSG=data; | |
3ddb9247 | 256 | |
bb4bdbaf | 257 | t_fdm->addWriteFD(sock->getHandle(), handleTCPClientWritable, pident); |
50c81227 | 258 | string packet; |
5c633640 | 259 | |
5b0ddd18 | 260 | int ret=MT->waitEvent(pident, &packet, g_networkTimeoutMsec); |
23db0a09 | 261 | |
9170fbaf | 262 | if(!ret || ret==-1) { // timeout |
bb4bdbaf | 263 | t_fdm->removeWriteFD(sock->getHandle()); |
5c633640 | 264 | } |
50c81227 BH |
265 | else if(packet.size() !=data.size()) { // main loop tells us what it sent out, or empty in case of an error |
266 | return -1; | |
267 | } | |
9170fbaf | 268 | return ret; |
5c633640 BH |
269 | } |
270 | ||
d187038c | 271 | static void handleTCPClientReadable(int fd, FDMultiplexer::funcparam_t& var); |
09e6702a | 272 | |
9170fbaf | 273 | // -1 is error, 0 is timeout, 1 is success |
a683e8bd | 274 | int arecvtcp(string& data, size_t len, Socket* sock, bool incompleteOkay) |
288f4aa9 | 275 | { |
50c81227 | 276 | data.clear(); |
5c633640 BH |
277 | PacketID pident; |
278 | pident.sock=sock; | |
279 | pident.inNeeded=len; | |
825fa717 | 280 | pident.inIncompleteOkay=incompleteOkay; |
bb4bdbaf | 281 | t_fdm->addReadFD(sock->getHandle(), handleTCPClientReadable, pident); |
5c633640 | 282 | |
bb4bdbaf | 283 | int ret=MT->waitEvent(pident,&data, g_networkTimeoutMsec); |
9170fbaf | 284 | if(!ret || ret==-1) { // timeout |
bb4bdbaf | 285 | t_fdm->removeReadFD(sock->getHandle()); |
288f4aa9 | 286 | } |
50c81227 BH |
287 | else if(data.empty()) {// error, EOF or other |
288 | return -1; | |
289 | } | |
290 | ||
9170fbaf | 291 | return ret; |
288f4aa9 BH |
292 | } |
293 | ||
d187038c | 294 | static void handleGenUDPQueryResponse(int fd, FDMultiplexer::funcparam_t& var) |
4465e941 | 295 | { |
fba1e944 | 296 | PacketID pident=*any_cast<PacketID>(&var); |
4465e941 | 297 | char resp[512]; |
a683e8bd | 298 | ssize_t ret=recv(fd, resp, sizeof(resp), 0); |
4465e941 | 299 | t_fdm->removeReadFD(fd); |
300 | if(ret >= 0) { | |
a683e8bd | 301 | string data(resp, (size_t) ret); |
fba1e944 | 302 | MT->sendEvent(pident, &data); |
4465e941 | 303 | } |
304 | else { | |
fba1e944 | 305 | string empty; |
306 | MT->sendEvent(pident, &empty); | |
307 | // cerr<<"Had some kind of error: "<<ret<<", "<<strerror(errno)<<endl; | |
4465e941 | 308 | } |
309 | } | |
fba1e944 | 310 | string GenUDPQueryResponse(const ComboAddress& dest, const string& query) |
4465e941 | 311 | { |
4465e941 | 312 | Socket s(dest.sin4.sin_family, SOCK_DGRAM); |
313 | s.setNonBlocking(); | |
314 | ComboAddress local = getQueryLocalAddress(dest.sin4.sin_family, 0); | |
315 | ||
316 | s.bind(local); | |
317 | s.connect(dest); | |
4465e941 | 318 | s.send(query); |
319 | ||
320 | PacketID pident; | |
321 | pident.sock=&s; | |
322 | pident.type=0; | |
fba1e944 | 323 | t_fdm->addReadFD(s.getHandle(), handleGenUDPQueryResponse, pident); |
4465e941 | 324 | |
325 | string data; | |
fba1e944 | 326 | |
4465e941 | 327 | int ret=MT->waitEvent(pident,&data, g_networkTimeoutMsec); |
fba1e944 | 328 | |
4465e941 | 329 | if(!ret || ret==-1) { // timeout |
4465e941 | 330 | t_fdm->removeReadFD(s.getHandle()); |
331 | } | |
332 | else if(data.empty()) {// error, EOF or other | |
fba1e944 | 333 | // we could special case this |
4465e941 | 334 | return data; |
335 | } | |
4465e941 | 336 | return data; |
337 | } | |
338 | ||
d7dae798 | 339 | //! pick a random query local address |
1652a63e | 340 | ComboAddress getQueryLocalAddress(int family, uint16_t port) |
5a38281c | 341 | { |
1652a63e | 342 | ComboAddress ret; |
5a38281c | 343 | if(family==AF_INET) { |
3ddb9247 | 344 | if(g_localQueryAddresses4.empty()) |
1652a63e | 345 | ret = g_local4; |
3ddb9247 | 346 | else |
1652a63e BH |
347 | ret = g_localQueryAddresses4[dns_random(g_localQueryAddresses4.size())]; |
348 | ret.sin4.sin_port = htons(port); | |
5a38281c BH |
349 | } |
350 | else { | |
351 | if(g_localQueryAddresses6.empty()) | |
1652a63e BH |
352 | ret = g_local6; |
353 | else | |
354 | ret = g_localQueryAddresses6[dns_random(g_localQueryAddresses6.size())]; | |
3ddb9247 | 355 | |
1652a63e | 356 | ret.sin6.sin6_port = htons(port); |
5a38281c | 357 | } |
1652a63e | 358 | return ret; |
5a38281c | 359 | } |
4ef015cd | 360 | |
d187038c | 361 | static void handleUDPServerResponse(int fd, FDMultiplexer::funcparam_t&); |
09e6702a | 362 | |
d187038c | 363 | static void setSocketBuffer(int fd, int optname, uint32_t size) |
d7dae798 BH |
364 | { |
365 | uint32_t psize=0; | |
366 | socklen_t len=sizeof(psize); | |
3ddb9247 | 367 | |
d7dae798 BH |
368 | if(!getsockopt(fd, SOL_SOCKET, optname, (char*)&psize, &len) && psize > size) { |
369 | L<<Logger::Error<<"Not decreasing socket buffer size from "<<psize<<" to "<<size<<endl; | |
3ddb9247 | 370 | return; |
d7dae798 BH |
371 | } |
372 | ||
373 | if (setsockopt(fd, SOL_SOCKET, optname, (char*)&size, sizeof(size)) < 0 ) | |
c057bfaa | 374 | L<<Logger::Error<<"Unable to raise socket buffer size to "<<size<<": "<<strerror(errno)<<endl; |
d7dae798 BH |
375 | } |
376 | ||
377 | ||
378 | static void setSocketReceiveBuffer(int fd, uint32_t size) | |
379 | { | |
380 | setSocketBuffer(fd, SO_RCVBUF, size); | |
381 | } | |
382 | ||
383 | static void setSocketSendBuffer(int fd, uint32_t size) | |
384 | { | |
385 | setSocketBuffer(fd, SO_SNDBUF, size); | |
386 | } | |
387 | ||
388 | ||
4ef015cd BH |
389 | // you can ask this class for a UDP socket to send a query from |
390 | // this socket is not yours, don't even think about deleting it | |
391 | // but after you call 'returnSocket' on it, don't assume anything anymore | |
392 | class UDPClientSocks | |
393 | { | |
4ef015cd | 394 | unsigned int d_numsocks; |
4ef015cd | 395 | public: |
e2642526 | 396 | UDPClientSocks() : d_numsocks(0) |
4ef015cd BH |
397 | { |
398 | } | |
399 | ||
996c89cc | 400 | typedef set<int> socks_t; |
4ef015cd BH |
401 | socks_t d_socks; |
402 | ||
2ee280cf | 403 | // returning -2 means: temporary OS error (ie, out of files), -1 means error related to remote |
d8f6d49f | 404 | int getSocket(const ComboAddress& toaddr, int* fd) |
4ef015cd | 405 | { |
d8f6d49f BH |
406 | *fd=makeClientSocket(toaddr.sin4.sin_family); |
407 | if(*fd < 0) // temporary error - receive exception otherwise | |
2ee280cf | 408 | return -2; |
d8f6d49f BH |
409 | |
410 | if(connect(*fd, (struct sockaddr*)(&toaddr), toaddr.getSocklen()) < 0) { | |
411 | int err = errno; | |
41ff43f8 | 412 | // returnSocket(*fd); |
a7b68ae7 RG |
413 | try { |
414 | closesocket(*fd); | |
415 | } | |
416 | catch(const PDNSException& e) { | |
417 | L<<Logger::Error<<"Error closing UDP socket after connect() failed: "<<e.reason<<endl; | |
418 | } | |
419 | ||
d8f6d49f | 420 | if(err==ENETUNREACH) // Seth "My Interfaces Are Like A Yo Yo" Arnold special |
4957a608 | 421 | return -2; |
998a4334 | 422 | return -1; |
d8f6d49f | 423 | } |
998a4334 | 424 | |
d8f6d49f | 425 | d_socks.insert(*fd); |
998a4334 | 426 | d_numsocks++; |
d8f6d49f | 427 | return 0; |
4ef015cd BH |
428 | } |
429 | ||
095c3045 BH |
430 | void returnSocket(int fd) |
431 | { | |
432 | socks_t::iterator i=d_socks.find(fd); | |
34801ab1 | 433 | if(i==d_socks.end()) { |
335da0ba | 434 | throw PDNSException("Trying to return a socket (fd="+std::to_string(fd)+") not in the pool"); |
34801ab1 | 435 | } |
bb4bdbaf | 436 | returnSocketLocked(i); |
095c3045 BH |
437 | } |
438 | ||
4ef015cd | 439 | // return a socket to the pool, or simply erase it |
bb4bdbaf | 440 | void returnSocketLocked(socks_t::iterator& i) |
4ef015cd | 441 | { |
600fc20b | 442 | if(i==d_socks.end()) { |
3f81d239 | 443 | throw PDNSException("Trying to return a socket not in the pool"); |
600fc20b | 444 | } |
80baf329 | 445 | try { |
bb4bdbaf | 446 | t_fdm->removeReadFD(*i); |
80baf329 BH |
447 | } |
448 | catch(FDMultiplexerException& e) { | |
bb4bdbaf | 449 | // we sometimes return a socket that has not yet been assigned to t_fdm |
80baf329 | 450 | } |
a7b68ae7 RG |
451 | try { |
452 | closesocket(*i); | |
453 | } | |
454 | catch(const PDNSException& e) { | |
455 | L<<Logger::Error<<"Error closing returned UDP socket: "<<e.reason<<endl; | |
456 | } | |
3ddb9247 | 457 | |
998a4334 BH |
458 | d_socks.erase(i++); |
459 | --d_numsocks; | |
4ef015cd | 460 | } |
d8f6d49f BH |
461 | |
462 | // returns -1 for errors which might go away, throws for ones that won't | |
bb4bdbaf | 463 | static int makeClientSocket(int family) |
d8f6d49f | 464 | { |
a683e8bd | 465 | 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 | 466 | |
d8f6d49f BH |
467 | if(ret < 0 && errno==EMFILE) // this is not a catastrophic error |
468 | return ret; | |
3ddb9247 PD |
469 | |
470 | if(ret<0) | |
335da0ba | 471 | throw PDNSException("Making a socket for resolver (family = "+std::to_string(family)+"): "+stringerror()); |
36855b53 | 472 | |
7eb73ffa | 473 | // setCloseOnExec(ret); // we're not going to exec |
5a38281c | 474 | |
d8f6d49f | 475 | int tries=10; |
3aa91c3e | 476 | ComboAddress sin; |
d8f6d49f | 477 | while(--tries) { |
1652a63e | 478 | uint16_t port; |
3ddb9247 | 479 | |
d8f6d49f | 480 | if(tries==1) // fall back to kernel 'random' |
4957a608 | 481 | port = 0; |
1652a63e BH |
482 | else |
483 | port = 1025 + dns_random(64510); | |
5a38281c | 484 | |
3aa91c3e | 485 | sin=getQueryLocalAddress(family, port); // does htons for us |
5a38281c | 486 | |
3ddb9247 | 487 | if (::bind(ret, (struct sockaddr *)&sin, sin.getSocklen()) >= 0) |
4957a608 | 488 | break; |
d8f6d49f BH |
489 | } |
490 | if(!tries) | |
3aa91c3e | 491 | throw PDNSException("Resolver binding to local query client socket on "+sin.toString()+": "+stringerror()); |
3ddb9247 | 492 | |
3897b9e1 | 493 | setNonBlocking(ret); |
d8f6d49f BH |
494 | return ret; |
495 | } | |
49a699c4 BH |
496 | }; |
497 | ||
f26bf547 | 498 | static thread_local std::unique_ptr<UDPClientSocks> t_udpclientsocks; |
4ef015cd | 499 | |
288f4aa9 | 500 | /* these two functions are used by LWRes */ |
34801ab1 | 501 | // -2 is OS error, -1 is error that depends on the remote, > 0 is success |
a683e8bd | 502 | int asendto(const char *data, size_t len, int flags, |
3ddb9247 | 503 | const ComboAddress& toaddr, uint16_t id, const DNSName& domain, uint16_t qtype, int* fd) |
288f4aa9 | 504 | { |
34801ab1 BH |
505 | |
506 | PacketID pident; | |
787e5eab BH |
507 | pident.domain = domain; |
508 | pident.remote = toaddr; | |
509 | pident.type = qtype; | |
34801ab1 BH |
510 | |
511 | // see if there is an existing outstanding request we can chain on to, using partial equivalence function | |
512 | pair<MT_t::waiters_t::iterator, MT_t::waiters_t::iterator> chain=MT->d_waiters.equal_range(pident, PacketIDBirthdayCompare()); | |
513 | ||
514 | for(; chain.first != chain.second; chain.first++) { | |
515 | if(chain.first->key.fd > -1) { // don't chain onto existing chained waiter! | |
e27e91a8 | 516 | /* |
4665c31e BH |
517 | cerr<<"Orig: "<<pident.domain<<", "<<pident.remote.toString()<<", id="<<id<<endl; |
518 | cerr<<"Had hit: "<< chain.first->key.domain<<", "<<chain.first->key.remote.toString()<<", id="<<chain.first->key.id | |
4957a608 | 519 | <<", count="<<chain.first->key.chain.size()<<", origfd: "<<chain.first->key.fd<<endl; |
e27e91a8 | 520 | */ |
34801ab1 BH |
521 | chain.first->key.chain.insert(id); // we can chain |
522 | *fd=-1; // gets used in waitEvent / sendEvent later on | |
523 | return 1; | |
524 | } | |
525 | } | |
526 | ||
49a699c4 | 527 | int ret=t_udpclientsocks->getSocket(toaddr, fd); |
d8f6d49f BH |
528 | if(ret < 0) |
529 | return ret; | |
34801ab1 | 530 | |
998a4334 BH |
531 | pident.fd=*fd; |
532 | pident.id=id; | |
3ddb9247 | 533 | |
bb4bdbaf BH |
534 | t_fdm->addReadFD(*fd, handleUDPServerResponse, pident); |
535 | ret = send(*fd, data, len, 0); | |
536 | ||
5b0ddd18 | 537 | int tmp = errno; |
bb4bdbaf | 538 | |
7302ed0a | 539 | if(ret < 0) |
49a699c4 | 540 | t_udpclientsocks->returnSocket(*fd); |
bb4bdbaf | 541 | |
5b0ddd18 | 542 | errno = tmp; // this is for logging purposes only |
7302ed0a | 543 | return ret; |
288f4aa9 BH |
544 | } |
545 | ||
9170fbaf | 546 | // -1 is error, 0 is timeout, 1 is success |
a683e8bd | 547 | int arecvfrom(char *data, size_t len, int flags, const ComboAddress& fromaddr, size_t *d_len, |
c5c066bf | 548 | uint16_t id, const DNSName& domain, uint16_t qtype, int fd, struct timeval* now) |
288f4aa9 | 549 | { |
0d5f0a9f | 550 | static optional<unsigned int> nearMissLimit; |
3ddb9247 | 551 | if(!nearMissLimit) |
0d5f0a9f BH |
552 | nearMissLimit=::arg().asNum("spoof-nearmiss-max"); |
553 | ||
288f4aa9 | 554 | PacketID pident; |
4ef015cd | 555 | pident.fd=fd; |
288f4aa9 | 556 | pident.id=id; |
0d5f0a9f | 557 | pident.domain=domain; |
787e5eab | 558 | pident.type = qtype; |
996c89cc | 559 | pident.remote=fromaddr; |
b636533b | 560 | |
288f4aa9 | 561 | string packet; |
5b0ddd18 | 562 | int ret=MT->waitEvent(pident, &packet, g_networkTimeoutMsec, now); |
34801ab1 | 563 | |
9170fbaf | 564 | if(ret > 0) { |
996c89cc | 565 | if(packet.empty()) // means "error" |
3ddb9247 | 566 | return -1; |
998a4334 | 567 | |
a683e8bd | 568 | *d_len=packet.size(); |
9170fbaf | 569 | memcpy(data,packet.c_str(),min(len,*d_len)); |
0d5f0a9f | 570 | if(*nearMissLimit && pident.nearMisses > *nearMissLimit) { |
996c89cc | 571 | L<<Logger::Error<<"Too many ("<<pident.nearMisses<<" > "<<*nearMissLimit<<") bogus answers for '"<<domain<<"' from "<<fromaddr.toString()<<", assuming spoof attempt."<<endl; |
0d5f0a9f | 572 | g_stats.spoofCount++; |
35ce8576 BH |
573 | return -1; |
574 | } | |
288f4aa9 | 575 | } |
09e6702a | 576 | else { |
34801ab1 | 577 | if(fd >= 0) |
49a699c4 | 578 | t_udpclientsocks->returnSocket(fd); |
09e6702a | 579 | } |
9170fbaf | 580 | return ret; |
288f4aa9 BH |
581 | } |
582 | ||
88def049 BH |
583 | static void writePid(void) |
584 | { | |
191f2e47 | 585 | if(!::arg().mustDo("write-pid")) |
586 | return; | |
18e7758c | 587 | ofstream of(s_pidfname.c_str(), std::ios_base::app); |
88def049 | 588 | if(of) |
705f31ae | 589 | of<< Utility::getpid() <<endl; |
88def049 | 590 | else |
c057bfaa | 591 | L<<Logger::Error<<"Writing pid for "<<Utility::getpid()<<" to "<<s_pidfname<<" failed: "<<strerror(errno)<<endl; |
88def049 BH |
592 | } |
593 | ||
cd989c87 | 594 | TCPConnection::TCPConnection(int fd, const ComboAddress& addr) : d_remote(addr), d_fd(fd) |
3ddb9247 PD |
595 | { |
596 | ++s_currentConnections; | |
cd989c87 | 597 | (*t_tcpClientCounts)[d_remote]++; |
0e408828 | 598 | } |
cd989c87 BH |
599 | |
600 | TCPConnection::~TCPConnection() | |
0e408828 | 601 | { |
a7b68ae7 RG |
602 | try { |
603 | if(closesocket(d_fd) < 0) | |
604 | L<<Logger::Error<<"Error closing socket for TCPConnection"<<endl; | |
605 | } | |
606 | catch(const PDNSException& e) { | |
607 | L<<Logger::Error<<"Error closing TCPConnection socket: "<<e.reason<<endl; | |
608 | } | |
609 | ||
3ddb9247 | 610 | if(t_tcpClientCounts->count(d_remote) && !(*t_tcpClientCounts)[d_remote]--) |
cd989c87 | 611 | t_tcpClientCounts->erase(d_remote); |
1bc9e6bd | 612 | --s_currentConnections; |
0e408828 | 613 | } |
0e9d9ce2 | 614 | |
3ddb9247 | 615 | AtomicCounter TCPConnection::s_currentConnections; |
d187038c RG |
616 | |
617 | static void handleRunningTCPQuestion(int fd, FDMultiplexer::funcparam_t& var); | |
6dcd28c3 | 618 | |
92011b8f | 619 | // the idea is, only do things that depend on the *response* here. Incoming accounting is on incoming. |
d187038c | 620 | static void updateResponseStats(int res, const ComboAddress& remote, unsigned int packetsize, const DNSName* query, uint16_t qtype) |
2cc13433 | 621 | { |
92011b8f | 622 | if(packetsize > 1000 && t_largeanswerremotes) |
623 | t_largeanswerremotes->push_back(remote); | |
2cc13433 BH |
624 | switch(res) { |
625 | case RCode::ServFail: | |
92011b8f | 626 | if(t_servfailremotes) { |
627 | t_servfailremotes->push_back(remote); | |
5af86fdc | 628 | if(query && t_servfailqueryring) // packet cache |
92011b8f | 629 | t_servfailqueryring->push_back(make_pair(*query, qtype)); |
630 | } | |
2cc13433 BH |
631 | g_stats.servFails++; |
632 | break; | |
633 | case RCode::NXDomain: | |
634 | g_stats.nxDomains++; | |
635 | break; | |
636 | case RCode::NoError: | |
637 | g_stats.noErrors++; | |
638 | break; | |
639 | } | |
640 | } | |
641 | ||
a903b39c | 642 | static string makeLoginfo(DNSComboWriter* dc) |
643 | try | |
644 | { | |
5ad5bb7d | 645 | return "("+dc->d_mdp.d_qname.toLogString()+"/"+DNSRecordContent::NumberToType(dc->d_mdp.d_qtype)+" from "+(dc->d_remote.toString())+")"; |
a903b39c | 646 | } |
647 | catch(...) | |
648 | { | |
649 | return "Exception making error message for exception"; | |
650 | } | |
651 | ||
aa7929a3 | 652 | #ifdef HAVE_PROTOBUF |
590388d2 | 653 | 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 | 654 | { |
e1c8a4bb RG |
655 | Netmask requestorNM(remote, remote.sin4.sin_family == AF_INET ? maskV4 : maskV6); |
656 | const ComboAddress& requestor = requestorNM.getMaskedNetwork(); | |
657 | RecProtoBufMessage message(DNSProtoBufMessage::Query, uniqueId, &requestor, &local, qname, qtype, qclass, id, tcp, len); | |
a94bc5d7 | 658 | message.setEDNSSubnet(ednssubnet, ednssubnet.isIpv4() ? maskV4 : maskV6); |
67e31ebe | 659 | message.setRequestorId(requestorId); |
590388d2 | 660 | message.setDeviceId(deviceId); |
02b47f43 | 661 | |
02b47f43 | 662 | if (!policyTags.empty()) { |
d9d3f9c1 | 663 | message.setPolicyTags(policyTags); |
02b47f43 | 664 | } |
aa7929a3 | 665 | |
d9d3f9c1 | 666 | // cerr <<message.toDebugString()<<endl; |
aa7929a3 | 667 | std::string str; |
d9d3f9c1 | 668 | message.serialize(str); |
aa7929a3 | 669 | logger->queueData(str); |
aa7929a3 RG |
670 | } |
671 | ||
d9d3f9c1 | 672 | static void protobufLogResponse(const std::shared_ptr<RemoteLogger>& logger, const RecProtoBufMessage& message) |
aa7929a3 | 673 | { |
d9d3f9c1 | 674 | // cerr <<message.toDebugString()<<endl; |
aa7929a3 | 675 | std::string str; |
d9d3f9c1 | 676 | message.serialize(str); |
aa7929a3 | 677 | logger->queueData(str); |
aa7929a3 RG |
678 | } |
679 | #endif | |
680 | ||
53508135 PL |
681 | /** |
682 | * Chases the CNAME provided by the PolicyCustom RPZ policy. | |
683 | * | |
684 | * @param spoofed: The DNSRecord that was created by the policy, should already be added to ret | |
685 | * @param qtype: The QType of the original query | |
686 | * @param sr: A SyncRes | |
687 | * @param res: An integer that will contain the RCODE of the lookup we do | |
688 | * @param ret: A vector of DNSRecords where the result of the CNAME chase should be appended to | |
689 | */ | |
d187038c | 690 | static void handleRPZCustom(const DNSRecord& spoofed, const QType& qtype, SyncRes& sr, int& res, vector<DNSRecord>& ret) |
53508135 PL |
691 | { |
692 | if (spoofed.d_type == QType::CNAME) { | |
30ee601a RG |
693 | bool oldWantsRPZ = sr.getWantsRPZ(); |
694 | sr.setWantsRPZ(false); | |
53508135 PL |
695 | vector<DNSRecord> ans; |
696 | res = sr.beginResolve(DNSName(spoofed.d_content->getZoneRepresentation()), qtype, 1, ans); | |
697 | for (const auto& rec : ans) { | |
698 | if(rec.d_place == DNSResourceRecord::ANSWER) { | |
699 | ret.push_back(rec); | |
700 | } | |
701 | } | |
702 | // Reset the RPZ state of the SyncRes | |
30ee601a | 703 | sr.setWantsRPZ(oldWantsRPZ); |
53508135 PL |
704 | } |
705 | } | |
706 | ||
97c6d7e5 RG |
707 | static bool addRecordToPacket(DNSPacketWriter& pw, const DNSRecord& rec, uint32_t& minTTL, const uint16_t maxAnswerSize) |
708 | { | |
709 | pw.startRecord(rec.d_name, rec.d_type, rec.d_ttl, rec.d_class, rec.d_place); | |
710 | ||
711 | if(rec.d_type != QType::OPT) // their TTL ain't real | |
712 | minTTL = min(minTTL, rec.d_ttl); | |
713 | ||
714 | rec.d_content->toPacket(pw); | |
715 | if(pw.size() > static_cast<size_t>(maxAnswerSize)) { | |
716 | pw.rollback(); | |
717 | if(rec.d_place != DNSResourceRecord::ADDITIONAL) { | |
718 | pw.getHeader()->tc=1; | |
719 | pw.truncate(); | |
720 | } | |
721 | return false; | |
722 | } | |
723 | ||
724 | return true; | |
725 | } | |
726 | ||
d187038c | 727 | static void startDoResolve(void *p) |
288f4aa9 | 728 | { |
7b1469bb | 729 | DNSComboWriter* dc=(DNSComboWriter *)p; |
288f4aa9 | 730 | try { |
5af86fdc RG |
731 | if (t_queryring) |
732 | t_queryring->push_back(make_pair(dc->d_mdp.d_qname, dc->d_mdp.d_qtype)); | |
92011b8f | 733 | |
32015748 | 734 | uint16_t maxanswersize = dc->d_tcp ? 65535 : min(static_cast<uint16_t>(512), g_udpTruncationThreshold); |
7f7b8d55 | 735 | EDNSOpts edo; |
8e079f3a | 736 | bool haveEDNS=false; |
737 | if(getEDNSOpts(dc->d_mdp, &edo)) { | |
32015748 RG |
738 | if(!dc->d_tcp) { |
739 | /* rfc6891 6.2.3: | |
740 | "Values lower than 512 MUST be treated as equal to 512." | |
741 | */ | |
742 | maxanswersize = min(static_cast<uint16_t>(edo.d_packetsize >= 512 ? edo.d_packetsize : 512), g_udpTruncationThreshold); | |
743 | } | |
e8340d27 | 744 | dc->d_ednsOpts = edo.d_options; |
8e079f3a | 745 | haveEDNS=true; |
b40562da RG |
746 | |
747 | if (g_useIncomingECS && !dc->d_ecsParsed) { | |
748 | for (const auto& o : edo.d_options) { | |
749 | if (o.first == EDNSOptionCode::ECS) { | |
750 | dc->d_ecsFound = getEDNSSubnetOptsFromString(o.second, &dc->d_ednssubnet); | |
751 | break; | |
752 | } | |
753 | } | |
754 | } | |
10321a98 | 755 | } |
b40562da RG |
756 | /* perhaps there was no EDNS or no ECS but by now we looked */ |
757 | dc->d_ecsParsed = true; | |
e325f20c | 758 | vector<DNSRecord> ret; |
ea634573 | 759 | vector<uint8_t> packet; |
b23b8614 | 760 | |
ad42489c | 761 | auto luaconfsLocal = g_luaconfs.getLocal(); |
b8470add PL |
762 | // Used to tell syncres later on if we should apply NSDNAME and NSIP RPZ triggers for this query |
763 | bool wantsRPZ(true); | |
d9d3f9c1 | 764 | RecProtoBufMessage pbMessage(RecProtoBufMessage::Response); |
aa7929a3 | 765 | #ifdef HAVE_PROTOBUF |
d9d3f9c1 | 766 | if (luaconfsLocal->protobufServer) { |
e1c8a4bb RG |
767 | Netmask requestorNM(dc->d_remote, dc->d_remote.sin4.sin_family == AF_INET ? luaconfsLocal->protobufMaskV4 : luaconfsLocal->protobufMaskV6); |
768 | const ComboAddress& requestor = requestorNM.getMaskedNetwork(); | |
769 | pbMessage.update(dc->d_uuid, &requestor, &dc->d_local, dc->d_tcp, dc->d_mdp.d_header.id); | |
b40562da | 770 | pbMessage.setEDNSSubnet(dc->d_ednssubnet.source, dc->d_ednssubnet.source.isIpv4() ? luaconfsLocal->protobufMaskV4 : luaconfsLocal->protobufMaskV6); |
d9d3f9c1 RG |
771 | pbMessage.setQuestion(dc->d_mdp.d_qname, dc->d_mdp.d_qtype, dc->d_mdp.d_qclass); |
772 | } | |
773 | #endif /* HAVE_PROTOBUF */ | |
ad42489c | 774 | |
3ddb9247 | 775 | DNSPacketWriter pw(packet, dc->d_mdp.d_qname, dc->d_mdp.d_qtype, dc->d_mdp.d_qclass); |
ea634573 BH |
776 | |
777 | pw.getHeader()->aa=0; | |
778 | pw.getHeader()->ra=1; | |
c154c8a4 | 779 | pw.getHeader()->qr=1; |
bb4bdbaf | 780 | pw.getHeader()->tc=0; |
ea634573 | 781 | pw.getHeader()->id=dc->d_mdp.d_header.id; |
10321a98 | 782 | pw.getHeader()->rd=dc->d_mdp.d_header.rd; |
57769f13 | 783 | pw.getHeader()->cd=dc->d_mdp.d_header.cd; |
ea634573 | 784 | |
904d3219 PD |
785 | uint32_t minTTL=std::numeric_limits<uint32_t>::max(); |
786 | ||
787 | SyncRes sr(dc->d_now); | |
0c43f455 | 788 | |
2e921ec6 | 789 | bool DNSSECOK=false; |
3457a2a0 | 790 | if(t_pdl) { |
f26bf547 | 791 | sr.setLuaEngine(t_pdl); |
3457a2a0 | 792 | } |
9eec8c98 | 793 | if(g_dnssecmode != DNSSECMode::Off) { |
30ee601a | 794 | sr.setDoDNSSEC(true); |
9eec8c98 PL |
795 | |
796 | // Does the requestor want DNSSEC records? | |
797 | if(edo.d_Z & EDNSOpts::DNSSECOK) { | |
798 | DNSSECOK=true; | |
799 | g_stats.dnssecQueries++; | |
800 | } | |
801 | } else { | |
802 | // Ignore the client-set CD flag | |
803 | pw.getHeader()->cd=0; | |
5b9853c9 | 804 | } |
0c43f455 RG |
805 | sr.setDNSSECValidationRequested(g_dnssecmode == DNSSECMode::ValidateAll || g_dnssecmode==DNSSECMode::ValidateForLog || ((dc->d_mdp.d_header.ad || DNSSECOK) && g_dnssecmode==DNSSECMode::Process)); |
806 | ||
4898a348 | 807 | #ifdef HAVE_PROTOBUF |
30ee601a | 808 | sr.setInitialRequestId(dc->d_uuid); |
4898a348 | 809 | #endif |
0c43f455 | 810 | |
2fe3354d | 811 | sr.setQuerySource(dc->d_remote, g_useIncomingECS && !dc->d_ednssubnet.source.empty() ? boost::optional<const EDNSSubnetOpts&>(dc->d_ednssubnet) : boost::none); |
57769f13 | 812 | |
904d3219 PD |
813 | bool tracedQuery=false; // we could consider letting Lua know about this too |
814 | bool variableAnswer = false; | |
9fc36e90 | 815 | bool shouldNotValidate = false; |
904d3219 | 816 | |
ef3b6cd7 RG |
817 | /* preresolve expects res (dq.rcode) to be set to RCode::NoError by default */ |
818 | int res = RCode::NoError; | |
1f1ca368 | 819 | DNSFilterEngine::Policy appliedPolicy; |
39ec5d29 | 820 | DNSRecord spoofed; |
6e505c5e RG |
821 | RecursorLua4::DNSQuestion dq(dc->d_remote, dc->d_local, dc->d_mdp.d_qname, dc->d_mdp.d_qtype, dc->d_tcp, variableAnswer, wantsRPZ); |
822 | dq.ednsFlags = &edo.d_Z; | |
823 | dq.ednsOptions = &dc->d_ednsOpts; | |
824 | dq.tag = dc->d_tag; | |
825 | dq.discardedPolicies = &sr.d_discardedPolicies; | |
826 | dq.policyTags = &dc->d_policyTags; | |
827 | dq.appliedPolicy = &appliedPolicy; | |
828 | dq.currentRecords = &ret; | |
829 | dq.dh = &dc->d_mdp.d_header; | |
05c74122 | 830 | dq.data = dc->d_data; |
67e31ebe RG |
831 | #ifdef HAVE_PROTOBUF |
832 | dq.requestorId = dc->d_requestorId; | |
590388d2 | 833 | dq.deviceId = dc->d_deviceId; |
67e31ebe | 834 | #endif |
ba21fcfe | 835 | |
e661a20b | 836 | if(dc->d_mdp.d_qtype==QType::ANY && !dc->d_tcp && g_anyToTcp) { |
56b4d21b PD |
837 | pw.getHeader()->tc = 1; |
838 | res = 0; | |
839 | variableAnswer = true; | |
e661a20b PD |
840 | goto sendit; |
841 | } | |
842 | ||
f26bf547 | 843 | if(t_traceRegex && t_traceRegex->match(dc->d_mdp.d_qname.toString())) { |
77499b05 BH |
844 | sr.setLogMode(SyncRes::Store); |
845 | tracedQuery=true; | |
846 | } | |
3ddb9247 | 847 | |
8f7473d7 | 848 | |
976ec823 | 849 | if(!g_quiet || tracedQuery) { |
461df9d2 | 850 | L<<Logger::Warning<<t_id<<" ["<<MT->getTid()<<"/"<<MT->numProcesses()<<"] " << (dc->d_tcp ? "TCP " : "") << "question for '"<<dc->d_mdp.d_qname<<"|" |
976ec823 | 851 | <<DNSRecordContent::NumberToType(dc->d_mdp.d_qtype)<<"' from "<<dc->getRemote(); |
b40562da RG |
852 | if(!dc->d_ednssubnet.source.empty()) { |
853 | L<<" (ecs "<<dc->d_ednssubnet.source.toString()<<")"; | |
6e986f5e | 854 | } |
976ec823 | 855 | L<<endl; |
856 | } | |
c75a6a9e | 857 | |
fededf47 | 858 | sr.setId(MT->getTid()); |
67828389 | 859 | if(!dc->d_mdp.d_header.rd) |
c836dc19 BH |
860 | sr.setCacheOnly(); |
861 | ||
f26bf547 RG |
862 | if (t_pdl) { |
863 | t_pdl->prerpz(dq, res); | |
0a273054 RG |
864 | } |
865 | ||
db486de5 | 866 | // Check if the query has a policy attached to it |
0a273054 | 867 | if (wantsRPZ) { |
1f1ca368 | 868 | appliedPolicy = luaconfsLocal->dfe.getQueryPolicy(dc->d_mdp.d_qname, dc->d_remote, sr.d_discardedPolicies); |
0a273054 | 869 | } |
644dd1da | 870 | |
54be222b | 871 | // if there is a RecursorLua active, and it 'took' the query in preResolve, we don't launch beginResolve |
f26bf547 | 872 | if(!t_pdl || !t_pdl->preresolve(dq, res)) { |
b8470add | 873 | |
30ee601a | 874 | sr.setWantsRPZ(wantsRPZ); |
b8470add PL |
875 | if(wantsRPZ) { |
876 | switch(appliedPolicy.d_kind) { | |
877 | case DNSFilterEngine::PolicyKind::NoAction: | |
878 | break; | |
879 | case DNSFilterEngine::PolicyKind::Drop: | |
880 | g_stats.policyDrops++; | |
7a25883a | 881 | g_stats.policyResults[appliedPolicy.d_kind]++; |
b8470add PL |
882 | delete dc; |
883 | dc=0; | |
884 | return; | |
885 | case DNSFilterEngine::PolicyKind::NXDOMAIN: | |
886 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
887 | res=RCode::NXDomain; | |
888 | goto haveAnswer; | |
889 | case DNSFilterEngine::PolicyKind::NODATA: | |
890 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
891 | res=RCode::NoError; | |
db486de5 | 892 | goto haveAnswer; |
b8470add PL |
893 | case DNSFilterEngine::PolicyKind::Custom: |
894 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
895 | res=RCode::NoError; | |
a9e029ee | 896 | spoofed=appliedPolicy.getCustomRecord(dc->d_mdp.d_qname); |
b8470add | 897 | ret.push_back(spoofed); |
53508135 | 898 | handleRPZCustom(spoofed, QType(dc->d_mdp.d_qtype), sr, res, ret); |
b8470add PL |
899 | goto haveAnswer; |
900 | case DNSFilterEngine::PolicyKind::Truncate: | |
901 | if(!dc->d_tcp) { | |
902 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
903 | res=RCode::NoError; | |
904 | pw.getHeader()->tc=1; | |
905 | goto haveAnswer; | |
906 | } | |
907 | break; | |
908 | } | |
db486de5 PL |
909 | } |
910 | ||
b8470add | 911 | // Query got not handled for QNAME Policy reasons, now actually go out to find an answer |
44971ca0 PD |
912 | try { |
913 | res = sr.beginResolve(dc->d_mdp.d_qname, QType(dc->d_mdp.d_qtype), dc->d_mdp.d_qclass, ret); | |
9fc36e90 | 914 | shouldNotValidate = sr.wasOutOfBand(); |
44971ca0 PD |
915 | } |
916 | catch(ImmediateServFailException &e) { | |
854d44e3 | 917 | if(g_logCommonErrors) |
918 | L<<Logger::Notice<<"Sending SERVFAIL to "<<dc->getRemote()<<" during resolve of '"<<dc->d_mdp.d_qname<<"' because: "<<e.reason<<endl; | |
44971ca0 PD |
919 | res = RCode::ServFail; |
920 | } | |
4485aa35 | 921 | |
1921a4c2 RG |
922 | dq.validationState = sr.getValidationState(); |
923 | ||
b8470add PL |
924 | // During lookup, an NSDNAME or NSIP trigger was hit in RPZ |
925 | if (res == -2) { // XXX This block should be macro'd, it is repeated post-resolve. | |
926 | appliedPolicy = sr.d_appliedPolicy; | |
927 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
928 | switch(appliedPolicy.d_kind) { | |
929 | case DNSFilterEngine::PolicyKind::NoAction: // This can never happen | |
930 | throw PDNSException("NoAction policy returned while a NSDNAME or NSIP trigger was hit"); | |
931 | case DNSFilterEngine::PolicyKind::Drop: | |
932 | g_stats.policyDrops++; | |
933 | delete dc; | |
934 | dc=0; | |
935 | return; | |
936 | case DNSFilterEngine::PolicyKind::NXDOMAIN: | |
937 | ret.clear(); | |
938 | res=RCode::NXDomain; | |
939 | goto haveAnswer; | |
940 | ||
941 | case DNSFilterEngine::PolicyKind::NODATA: | |
942 | ret.clear(); | |
943 | res=RCode::NoError; | |
944 | goto haveAnswer; | |
945 | ||
946 | case DNSFilterEngine::PolicyKind::Truncate: | |
947 | if(!dc->d_tcp) { | |
948 | ret.clear(); | |
949 | res=RCode::NoError; | |
950 | pw.getHeader()->tc=1; | |
951 | goto haveAnswer; | |
952 | } | |
953 | break; | |
954 | ||
955 | case DNSFilterEngine::PolicyKind::Custom: | |
956 | ret.clear(); | |
957 | res=RCode::NoError; | |
a9e029ee | 958 | spoofed=appliedPolicy.getCustomRecord(dc->d_mdp.d_qname); |
b8470add | 959 | ret.push_back(spoofed); |
53508135 | 960 | handleRPZCustom(spoofed, QType(dc->d_mdp.d_qtype), sr, res, ret); |
b8470add PL |
961 | goto haveAnswer; |
962 | } | |
963 | } | |
964 | ||
965 | if (wantsRPZ) { | |
1f1ca368 | 966 | appliedPolicy = luaconfsLocal->dfe.getPostPolicy(ret, sr.d_discardedPolicies); |
b8470add | 967 | } |
db486de5 | 968 | |
f26bf547 | 969 | if(t_pdl) { |
db486de5 PL |
970 | if(res == RCode::NoError) { |
971 | auto i=ret.cbegin(); | |
972 | for(; i!= ret.cend(); ++i) | |
973 | if(i->d_type == dc->d_mdp.d_qtype && i->d_place == DNSResourceRecord::ANSWER) | |
974 | break; | |
f26bf547 | 975 | if(i == ret.cend() && t_pdl->nodata(dq, res)) |
3ca4e735 PL |
976 | shouldNotValidate = true; |
977 | ||
db486de5 | 978 | } |
f26bf547 | 979 | else if(res == RCode::NXDomain && t_pdl->nxdomain(dq, res)) |
3ca4e735 | 980 | shouldNotValidate = true; |
db486de5 | 981 | |
f26bf547 | 982 | if(t_pdl->postresolve(dq, res)) |
3ca4e735 | 983 | shouldNotValidate = true; |
db486de5 PL |
984 | } |
985 | ||
b8470add PL |
986 | if (wantsRPZ) { //XXX This block is repeated, see above |
987 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
988 | switch(appliedPolicy.d_kind) { | |
989 | case DNSFilterEngine::PolicyKind::NoAction: | |
990 | break; | |
991 | case DNSFilterEngine::PolicyKind::Drop: | |
992 | g_stats.policyDrops++; | |
993 | delete dc; | |
994 | dc=0; | |
995 | return; | |
996 | case DNSFilterEngine::PolicyKind::NXDOMAIN: | |
997 | ret.clear(); | |
998 | res=RCode::NXDomain; | |
999 | goto haveAnswer; | |
1000 | ||
1001 | case DNSFilterEngine::PolicyKind::NODATA: | |
1002 | ret.clear(); | |
1003 | res=RCode::NoError; | |
1004 | goto haveAnswer; | |
1005 | ||
1006 | case DNSFilterEngine::PolicyKind::Truncate: | |
1007 | if(!dc->d_tcp) { | |
1008 | ret.clear(); | |
1009 | res=RCode::NoError; | |
1010 | pw.getHeader()->tc=1; | |
1011 | goto haveAnswer; | |
1012 | } | |
1013 | break; | |
1014 | ||
1015 | case DNSFilterEngine::PolicyKind::Custom: | |
1016 | ret.clear(); | |
1017 | res=RCode::NoError; | |
a9e029ee | 1018 | spoofed=appliedPolicy.getCustomRecord(dc->d_mdp.d_qname); |
b8470add | 1019 | ret.push_back(spoofed); |
53508135 | 1020 | handleRPZCustom(spoofed, QType(dc->d_mdp.d_qtype), sr, res, ret); |
b8470add PL |
1021 | goto haveAnswer; |
1022 | } | |
644dd1da | 1023 | } |
4485aa35 | 1024 | } |
644dd1da | 1025 | haveAnswer:; |
3e8216c8 | 1026 | if(res == PolicyDecision::DROP) { |
e9c2ad3a | 1027 | g_stats.policyDrops++; |
ae7e77ad | 1028 | delete dc; |
1029 | dc=0; | |
1030 | return; | |
3ddb9247 | 1031 | } |
9cdfab64 | 1032 | if(tracedQuery || res == -1 || res == RCode::ServFail || pw.getHeader()->rcode == RCode::ServFail) |
1dc8f4d0 | 1033 | { |
85ffbc53 PD |
1034 | string trace(sr.getTrace()); |
1035 | if(!trace.empty()) { | |
1036 | vector<string> lines; | |
1037 | boost::split(lines, trace, boost::is_any_of("\n")); | |
1dc8f4d0 | 1038 | for(const string& line : lines) { |
85ffbc53 PD |
1039 | if(!line.empty()) |
1040 | L<<Logger::Warning<< line << endl; | |
1041 | } | |
1042 | } | |
1043 | } | |
3ddb9247 | 1044 | |
9cdfab64 | 1045 | if(res == -1) { |
0fe1d080 PD |
1046 | pw.getHeader()->rcode=RCode::ServFail; |
1047 | // no commit here, because no record | |
1048 | g_stats.servFails++; | |
1049 | } | |
288f4aa9 | 1050 | else { |
ea634573 | 1051 | pw.getHeader()->rcode=res; |
92011b8f | 1052 | |
f3fe4ae6 | 1053 | // Does the validation mode or query demand validation? |
0c43f455 | 1054 | if(!shouldNotValidate && sr.isDNSSECValidationRequested()) { |
b25cae9a | 1055 | try { |
f3fe4ae6 | 1056 | if(sr.doLog()) { |
5fc44cd2 | 1057 | L<<Logger::Warning<<"Starting validation of answer to "<<dc->d_mdp.d_qname<<"|"<<QType(dc->d_mdp.d_qtype).getName()<<" for "<<dc->d_remote.toStringWithPort()<<endl; |
2e921ec6 | 1058 | } |
4d2be65d RG |
1059 | |
1060 | auto state = sr.getValidationState(); | |
1061 | ||
b25cae9a | 1062 | if(state == Secure) { |
2e921ec6 | 1063 | if(sr.doLog()) { |
5fc44cd2 | 1064 | L<<Logger::Warning<<"Answer to "<<dc->d_mdp.d_qname<<"|"<<QType(dc->d_mdp.d_qtype).getName()<<" for "<<dc->d_remote.toStringWithPort()<<" validates correctly"<<endl; |
2e921ec6 | 1065 | } |
b25cae9a | 1066 | |
1067 | // Is the query source interested in the value of the ad-bit? | |
885c8881 | 1068 | if (dc->d_mdp.d_header.ad || DNSSECOK) |
b25cae9a | 1069 | pw.getHeader()->ad=1; |
1070 | } | |
1071 | else if(state == Insecure) { | |
f3fe4ae6 | 1072 | if(sr.doLog()) { |
5fc44cd2 | 1073 | L<<Logger::Warning<<"Answer to "<<dc->d_mdp.d_qname<<"|"<<QType(dc->d_mdp.d_qtype).getName()<<" for "<<dc->d_remote.toStringWithPort()<<" validates as Insecure"<<endl; |
12ce523e | 1074 | } |
b25cae9a | 1075 | |
1076 | pw.getHeader()->ad=0; | |
f3fe4ae6 | 1077 | } |
b25cae9a | 1078 | else if(state == Bogus) { |
c87e1876 | 1079 | if(g_dnssecLogBogus || sr.doLog() || g_dnssecmode == DNSSECMode::ValidateForLog) { |
5fc44cd2 | 1080 | L<<Logger::Warning<<"Answer to "<<dc->d_mdp.d_qname<<"|"<<QType(dc->d_mdp.d_qtype).getName()<<" for "<<dc->d_remote.toStringWithPort()<<" validates as Bogus"<<endl; |
b25cae9a | 1081 | } |
1082 | ||
1083 | // Does the query or validation mode sending out a SERVFAIL on validation errors? | |
885c8881 | 1084 | if(!pw.getHeader()->cd && (g_dnssecmode == DNSSECMode::ValidateAll || dc->d_mdp.d_header.ad || DNSSECOK)) { |
b25cae9a | 1085 | if(sr.doLog()) { |
5fc44cd2 | 1086 | L<<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 | 1087 | } |
1088 | ||
1089 | pw.getHeader()->rcode=RCode::ServFail; | |
1090 | goto sendit; | |
1091 | } else { | |
1092 | if(sr.doLog()) { | |
5fc44cd2 | 1093 | L<<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 | 1094 | } |
1095 | } | |
1096 | } | |
1097 | } | |
1098 | catch(ImmediateServFailException &e) { | |
1099 | if(g_logCommonErrors) | |
5fc44cd2 | 1100 | L<<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 | 1101 | pw.getHeader()->rcode=RCode::ServFail; |
1102 | goto sendit; | |
f3fe4ae6 | 1103 | } |
b3f0ed10 | 1104 | } |
1105 | ||
c154c8a4 | 1106 | if(ret.size()) { |
92476c8b | 1107 | orderAndShuffle(ret); |
ad42489c | 1108 | if(auto sl = luaconfsLocal->sortlist.getOrderCmp(dc->d_remote)) { |
20d84f77 | 1109 | stable_sort(ret.begin(), ret.end(), *sl); |
3e61e7f7 | 1110 | variableAnswer=true; |
1111 | } | |
8e079f3a | 1112 | } |
0afa32d4 RG |
1113 | |
1114 | bool needCommit = false; | |
8e079f3a | 1115 | for(auto i=ret.cbegin(); i!=ret.cend(); ++i) { |
3e80ebce KM |
1116 | if( ! DNSSECOK && |
1117 | ( i->d_type == QType::NSEC3 || | |
1118 | ( | |
1119 | ( i->d_type == QType::RRSIG || i->d_type==QType::NSEC ) && | |
1120 | ( | |
1121 | ( dc->d_mdp.d_qtype != i->d_type && dc->d_mdp.d_qtype != QType::ANY ) || | |
1122 | i->d_place != DNSResourceRecord::ANSWER | |
1123 | ) | |
1124 | ) | |
1125 | ) | |
1126 | ) { | |
2e921ec6 | 1127 | continue; |
3e80ebce KM |
1128 | } |
1129 | ||
97c6d7e5 RG |
1130 | if (!addRecordToPacket(pw, *i, minTTL, maxanswersize)) { |
1131 | needCommit = false; | |
1132 | break; | |
1133 | } | |
1134 | needCommit = true; | |
1135 | ||
aa7929a3 | 1136 | #ifdef HAVE_PROTOBUF |
d9d3f9c1 RG |
1137 | if(luaconfsLocal->protobufServer && (i->d_type == QType::A || i->d_type == QType::AAAA || i->d_type == QType::CNAME)) { |
1138 | pbMessage.addRR(*i); | |
aa7929a3 RG |
1139 | } |
1140 | #endif | |
ea634573 | 1141 | } |
0afa32d4 | 1142 | if(needCommit) |
8e079f3a | 1143 | pw.commit(); |
288f4aa9 | 1144 | } |
10321a98 | 1145 | sendit:; |
b3f0ed10 | 1146 | |
97c6d7e5 RG |
1147 | if (haveEDNS) { |
1148 | /* we try to add the EDNS OPT RR even for truncated answers, | |
1149 | as rfc6891 states: | |
1150 | "The minimal response MUST be the DNS header, question section, and an | |
1151 | OPT record. This MUST also occur when a truncated response (using | |
1152 | the DNS header's TC bit) is returned." | |
1153 | */ | |
1154 | if (addRecordToPacket(pw, makeOpt(edo.d_packetsize, 0, edo.d_Z), minTTL, maxanswersize)) { | |
1155 | pw.commit(); | |
1156 | } | |
1157 | } | |
1158 | ||
79332bff | 1159 | g_rs.submitResponse(dc->d_mdp.d_qtype, packet.size(), !dc->d_tcp); |
92011b8f | 1160 | updateResponseStats(res, dc->d_remote, packet.size(), &dc->d_mdp.d_qname, dc->d_mdp.d_qtype); |
aa7929a3 | 1161 | #ifdef HAVE_PROTOBUF |
b790ef3d | 1162 | if (luaconfsLocal->protobufServer && (!luaconfsLocal->protobufTaggedOnly || (appliedPolicy.d_name && !appliedPolicy.d_name->empty()) || !dc->d_policyTags.empty())) { |
d9d3f9c1 RG |
1163 | pbMessage.setBytes(packet.size()); |
1164 | pbMessage.setResponseCode(pw.getHeader()->rcode); | |
0a273054 RG |
1165 | if (appliedPolicy.d_name) { |
1166 | pbMessage.setAppliedPolicy(*appliedPolicy.d_name); | |
f3da83fe | 1167 | pbMessage.setAppliedPolicyType(appliedPolicy.d_type); |
0a273054 | 1168 | } |
d9d3f9c1 | 1169 | pbMessage.setPolicyTags(dc->d_policyTags); |
58307a85 | 1170 | pbMessage.setQueryTime(dc->d_now.tv_sec, dc->d_now.tv_usec); |
67e31ebe | 1171 | pbMessage.setRequestorId(dq.requestorId); |
590388d2 | 1172 | pbMessage.setDeviceId(dq.deviceId); |
02b47f43 | 1173 | protobufLogResponse(luaconfsLocal->protobufServer, pbMessage); |
aa7929a3 RG |
1174 | } |
1175 | #endif | |
ea634573 | 1176 | if(!dc->d_tcp) { |
b71b60ee | 1177 | struct msghdr msgh; |
1178 | struct iovec iov; | |
1179 | char cbuf[256]; | |
1180 | fillMSGHdr(&msgh, &iov, cbuf, 0, (char*)&*packet.begin(), packet.size(), &dc->d_remote); | |
2c0af54f PD |
1181 | msgh.msg_control=NULL; |
1182 | ||
cbc03320 | 1183 | if(g_fromtosockets.count(dc->d_socket)) { |
fbe2a2e0 | 1184 | addCMsgSrcAddr(&msgh, cbuf, &dc->d_local, 0); |
2c0af54f | 1185 | } |
cbc03320 | 1186 | if(sendmsg(dc->d_socket, &msgh, 0) < 0 && g_logCommonErrors) |
1187 | L<<Logger::Warning<<"Sending UDP reply to client "<<dc->d_remote.toStringWithPort()<<" failed with: "<<strerror(errno)<<endl; | |
3762e821 | 1188 | if(!SyncRes::s_nopacketcache && !variableAnswer && !sr.wasVariable() ) { |
e9f63d47 | 1189 | 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 | 1190 | string((const char*)&*packet.begin(), packet.size()), |
3ddb9247 | 1191 | g_now.tv_sec, |
76e2b9e3 | 1192 | pw.getHeader()->rcode == RCode::ServFail ? SyncRes::s_packetcacheservfailttl : |
d9d3f9c1 RG |
1193 | min(minTTL,SyncRes::s_packetcachettl), |
1194 | &pbMessage); | |
1051f8a9 | 1195 | } |
3762e821 | 1196 | // else cerr<<"Not putting in packet cache: "<<sr.wasVariable()<<endl; |
feccc9fc | 1197 | } |
9c495589 BH |
1198 | else { |
1199 | char buf[2]; | |
ea634573 BH |
1200 | buf[0]=packet.size()/256; |
1201 | buf[1]=packet.size()%256; | |
feccc9fc | 1202 | |
c038218b | 1203 | Utility::iovec iov[2]; |
feccc9fc | 1204 | |
ea634573 BH |
1205 | iov[0].iov_base=(void*)buf; iov[0].iov_len=2; |
1206 | iov[1].iov_base=(void*)&*packet.begin(); iov[1].iov_len = packet.size(); | |
feccc9fc | 1207 | |
dd079764 | 1208 | int wret=Utility::writev(dc->d_socket, iov, 2); |
0e9d9ce2 | 1209 | bool hadError=true; |
feccc9fc | 1210 | |
dd079764 | 1211 | if(wret == 0) |
18af64a8 | 1212 | L<<Logger::Error<<"EOF writing TCP answer to "<<dc->getRemote()<<endl; |
dd079764 | 1213 | else if(wret < 0 ) |
18af64a8 | 1214 | L<<Logger::Error<<"Error writing TCP answer to "<<dc->getRemote()<<": "<< strerror(errno) <<endl; |
dd079764 RG |
1215 | else if((unsigned int)wret != 2 + packet.size()) |
1216 | L<<Logger::Error<<"Oops, partial answer sent to "<<dc->getRemote()<<" for "<<dc->d_mdp.d_qname<<" (size="<< (2 + packet.size()) <<", sent "<<wret<<")"<<endl; | |
0e9d9ce2 | 1217 | else |
18af64a8 | 1218 | hadError=false; |
3ddb9247 | 1219 | |
09e6702a | 1220 | // update tcp connection status, either by closing or moving to 'BYTE0' |
3ddb9247 | 1221 | |
09e6702a | 1222 | if(hadError) { |
18af64a8 | 1223 | // no need to remove us from FDM, we weren't there |
c36bc97a | 1224 | dc->d_socket = -1; |
09e6702a | 1225 | } |
a6ae6414 | 1226 | else { |
fde296a3 RG |
1227 | dc->d_tcpConnection->queriesCount++; |
1228 | if (g_tcpMaxQueriesPerConn && dc->d_tcpConnection->queriesCount >= g_tcpMaxQueriesPerConn) { | |
1229 | dc->d_socket = -1; | |
1230 | } | |
1231 | else { | |
1232 | dc->d_tcpConnection->state=TCPConnection::BYTE0; | |
1233 | Utility::gettimeofday(&g_now, 0); // needs to be updated | |
1234 | t_fdm->addReadFD(dc->d_socket, handleRunningTCPQuestion, dc->d_tcpConnection); | |
1235 | t_fdm->setReadTTD(dc->d_socket, g_now, g_tcpTimeout); | |
1236 | } | |
0e9d9ce2 | 1237 | } |
9c495589 | 1238 | } |
2c9119cd | 1239 | float spent=makeFloat(sr.getNow()-dc->d_now); |
1d5b3ce6 | 1240 | if(!g_quiet) { |
461df9d2 | 1241 | L<<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); |
ea634573 | 1242 | L<<"': "<<ntohs(pw.getHeader()->ancount)<<" answers, "<<ntohs(pw.getHeader()->arcount)<<" additional, took "<<sr.d_outqueries<<" packets, "<< |
2c9119cd | 1243 | sr.d_totUsec/1000.0<<" netw ms, "<< spent*1000.0<<" tot ms, "<< |
1244 | sr.d_throttledqueries<<" throttled, "<<sr.d_timeouts<<" timeouts, "<<sr.d_tcpoutqueries<<" tcp connections, rcode="<< res; | |
1245 | ||
1246 | if(!shouldNotValidate && sr.isDNSSECValidationRequested()) { | |
1247 | L<< ", dnssec="<<vStates[sr.getValidationState()]; | |
1248 | } | |
1249 | ||
1250 | L<<endl; | |
1251 | ||
c75a6a9e | 1252 | } |
b23b8614 | 1253 | |
3ddb9247 | 1254 | sr.d_outqueries ? t_RC->cacheMisses++ : t_RC->cacheHits++; |
2c9119cd | 1255 | |
fe213470 BH |
1256 | if(spent < 0.001) |
1257 | g_stats.answers0_1++; | |
1258 | else if(spent < 0.010) | |
1259 | g_stats.answers1_10++; | |
1260 | else if(spent < 0.1) | |
1261 | g_stats.answers10_100++; | |
1262 | else if(spent < 1.0) | |
1263 | g_stats.answers100_1000++; | |
1264 | else | |
1265 | g_stats.answersSlow++; | |
1266 | ||
574af7ea | 1267 | uint64_t newLat=(uint64_t)(spent*1000000); |
b841314c | 1268 | newLat = min(newLat,(uint64_t)(((uint64_t) g_networkTimeoutMsec)*1000)); // outliers of several minutes exist.. |
08f3f638 | 1269 | g_stats.avgLatencyUsec=(1-1.0/g_latencyStatSize)*g_stats.avgLatencyUsec + (float)newLat/g_latencyStatSize; |
0a6b1027 | 1270 | // no worries, we do this for packet cache hits elsewhere |
19178da9 | 1271 | |
1272 | auto ourtime = 1000.0*spent-sr.d_totUsec/1000.0; // in msec | |
1273 | if(ourtime < 1) | |
1274 | g_stats.ourtime0_1++; | |
1275 | else if(ourtime < 2) | |
1276 | g_stats.ourtime1_2++; | |
1277 | else if(ourtime < 4) | |
1278 | g_stats.ourtime2_4++; | |
1279 | else if(ourtime < 8) | |
1280 | g_stats.ourtime4_8++; | |
1281 | else if(ourtime < 16) | |
1282 | g_stats.ourtime8_16++; | |
1283 | else if(ourtime < 32) | |
1284 | g_stats.ourtime16_32++; | |
1285 | else { | |
1286 | // cerr<<"SLOW: "<<ourtime<<"ms -> "<<dc->d_mdp.d_qname<<"|"<<DNSRecordContent::NumberToType(dc->d_mdp.d_qtype)<<endl; | |
1287 | g_stats.ourtimeSlow++; | |
1288 | } | |
042da1a1 | 1289 | if(ourtime >= 0.0) { |
1290 | newLat=ourtime*1000; // usec | |
1291 | g_stats.avgLatencyOursUsec=(1-1.0/g_latencyStatSize)*g_stats.avgLatencyOursUsec + (float)newLat/g_latencyStatSize; | |
1292 | } | |
c6d04bdc | 1293 | // cout<<dc->d_mdp.d_qname<<"\t"<<MT->getUsec()<<"\t"<<sr.d_outqueries<<endl; |
ea634573 | 1294 | delete dc; |
c36bc97a | 1295 | dc=0; |
288f4aa9 | 1296 | } |
3f81d239 | 1297 | catch(PDNSException &ae) { |
a903b39c | 1298 | L<<Logger::Error<<"startDoResolve problem "<<makeLoginfo(dc)<<": "<<ae.reason<<endl; |
c36bc97a | 1299 | delete dc; |
288f4aa9 | 1300 | } |
7b1469bb | 1301 | catch(MOADNSException& e) { |
a903b39c | 1302 | L<<Logger::Error<<"DNS parser error "<<makeLoginfo(dc) <<": "<<dc->d_mdp.d_qname<<", "<<e.what()<<endl; |
c36bc97a | 1303 | delete dc; |
7b1469bb | 1304 | } |
fdbf35ac | 1305 | catch(std::exception& e) { |
068c7634 PD |
1306 | L<<Logger::Error<<"STL error "<< makeLoginfo(dc)<<": "<<e.what(); |
1307 | ||
1308 | // Luawrapper nests the exception from Lua, so we unnest it here | |
1309 | try { | |
1310 | std::rethrow_if_nested(e); | |
2010ac95 RG |
1311 | } catch(const std::exception& ne) { |
1312 | L<<". Extra info: "<<ne.what(); | |
068c7634 PD |
1313 | } catch(...) {} |
1314 | ||
1315 | L<<endl; | |
c36bc97a | 1316 | delete dc; |
c154c8a4 | 1317 | } |
288f4aa9 | 1318 | catch(...) { |
a903b39c | 1319 | L<<Logger::Error<<"Any other exception in a resolver context "<< makeLoginfo(dc) <<endl; |
288f4aa9 | 1320 | } |
3ddb9247 | 1321 | |
ec6eacbc | 1322 | g_stats.maxMThreadStackUsage = max(MT->getMaxStackUsage(), g_stats.maxMThreadStackUsage); |
288f4aa9 BH |
1323 | } |
1324 | ||
d187038c | 1325 | static void makeControlChannelSocket(int processNum=-1) |
1d5b3ce6 | 1326 | { |
2d733c0f | 1327 | string sockname=::arg()["socket-dir"]+"/"+s_programname; |
677e2a46 | 1328 | if(processNum >= 0) |
335da0ba | 1329 | sockname += "."+std::to_string(processNum); |
677e2a46 | 1330 | sockname+=".controlsocket"; |
41f7a068 | 1331 | s_rcc.listen(sockname); |
3ddb9247 | 1332 | |
387de317 BH |
1333 | int sockowner = -1; |
1334 | int sockgroup = -1; | |
1335 | ||
1336 | if (!::arg().isEmpty("socket-group")) | |
1337 | sockgroup=::arg().asGid("socket-group"); | |
1338 | if (!::arg().isEmpty("socket-owner")) | |
1339 | sockowner=::arg().asUid("socket-owner"); | |
3ddb9247 | 1340 | |
f838ad8d BH |
1341 | if (sockgroup > -1 || sockowner > -1) { |
1342 | if(chown(sockname.c_str(), sockowner, sockgroup) < 0) { | |
1343 | unixDie("Failed to chown control socket"); | |
1344 | } | |
1345 | } | |
387de317 BH |
1346 | |
1347 | // do mode change if socket-mode is given | |
1348 | if(!::arg().isEmpty("socket-mode")) { | |
1349 | mode_t sockmode=::arg().asMode("socket-mode"); | |
34c513f9 RG |
1350 | if(chmod(sockname.c_str(), sockmode) < 0) { |
1351 | unixDie("Failed to chmod control socket"); | |
1352 | } | |
387de317 | 1353 | } |
1d5b3ce6 BH |
1354 | } |
1355 | ||
00b8cadc | 1356 | static bool getQNameAndSubnet(const std::string& question, DNSName* dnsname, uint16_t* qtype, uint16_t* qclass, EDNSSubnetOpts* ednssubnet, std::map<uint16_t, EDNSOptionView>* options) |
02b47f43 | 1357 | { |
b40562da | 1358 | bool found = false; |
02b47f43 RG |
1359 | const struct dnsheader* dh = (struct dnsheader*)question.c_str(); |
1360 | size_t questionLen = question.length(); | |
1361 | unsigned int consumed=0; | |
1362 | *dnsname=DNSName(question.c_str(), questionLen, sizeof(dnsheader), false, qtype, qclass, &consumed); | |
1363 | ||
1364 | size_t pos= sizeof(dnsheader)+consumed+4; | |
1365 | /* at least OPT root label (1), type (2), class (2) and ttl (4) + OPT RR rdlen (2) | |
1366 | = 11 */ | |
1367 | if(ntohs(dh->arcount) == 1 && questionLen > pos + 11) { // this code can extract one (1) EDNS Subnet option | |
1368 | /* OPT root label (1) followed by type (2) */ | |
1369 | if(question.at(pos)==0 && question.at(pos+1)==0 && question.at(pos+2)==QType::OPT) { | |
00b8cadc RG |
1370 | if (!options) { |
1371 | char* ecsStart = nullptr; | |
1372 | size_t ecsLen = 0; | |
1373 | int res = getEDNSOption((char*)question.c_str()+pos+9, questionLen - pos - 9, EDNSOptionCode::ECS, &ecsStart, &ecsLen); | |
1374 | if (res == 0 && ecsLen > 4) { | |
1375 | EDNSSubnetOpts eso; | |
1376 | if(getEDNSSubnetOptsFromString(ecsStart + 4, ecsLen - 4, &eso)) { | |
1377 | *ednssubnet=eso; | |
1378 | found = true; | |
1379 | } | |
1380 | } | |
1381 | } | |
1382 | else { | |
1383 | int res = getEDNSOptions((char*)question.c_str()+pos+9, questionLen - pos - 9, *options); | |
1384 | if (res == 0) { | |
1385 | const auto& it = options->find(EDNSOptionCode::ECS); | |
1386 | if (it != options->end() && it->second.content != nullptr && it->second.size > 0) { | |
1387 | EDNSSubnetOpts eso; | |
1388 | if(getEDNSSubnetOptsFromString(it->second.content, it->second.size, &eso)) { | |
1389 | *ednssubnet=eso; | |
1390 | found = true; | |
1391 | } | |
1392 | } | |
02b47f43 RG |
1393 | } |
1394 | } | |
1395 | } | |
1396 | } | |
b40562da | 1397 | return found; |
02b47f43 RG |
1398 | } |
1399 | ||
d187038c | 1400 | static void handleRunningTCPQuestion(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 1401 | { |
cd989c87 | 1402 | shared_ptr<TCPConnection> conn=any_cast<shared_ptr<TCPConnection> >(var); |
c038218b | 1403 | |
879b3f70 | 1404 | if(conn->state==TCPConnection::BYTE0) { |
b841314c | 1405 | ssize_t bytes=recv(conn->getFD(), conn->data, 2, 0); |
09e6702a | 1406 | if(bytes==1) |
667f7e60 | 1407 | conn->state=TCPConnection::BYTE1; |
3ddb9247 | 1408 | if(bytes==2) { |
a0aa4f64 | 1409 | conn->qlen=(((unsigned char)conn->data[0]) << 8)+ (unsigned char)conn->data[1]; |
667f7e60 BH |
1410 | conn->bytesread=0; |
1411 | conn->state=TCPConnection::GETQUESTION; | |
09e6702a BH |
1412 | } |
1413 | if(!bytes || bytes < 0) { | |
bb4bdbaf | 1414 | t_fdm->removeReadFD(fd); |
09e6702a BH |
1415 | return; |
1416 | } | |
1417 | } | |
667f7e60 | 1418 | else if(conn->state==TCPConnection::BYTE1) { |
b841314c | 1419 | ssize_t bytes=recv(conn->getFD(), conn->data+1, 1, 0); |
09e6702a | 1420 | if(bytes==1) { |
667f7e60 | 1421 | conn->state=TCPConnection::GETQUESTION; |
a0aa4f64 | 1422 | conn->qlen=(((unsigned char)conn->data[0]) << 8)+ (unsigned char)conn->data[1]; |
667f7e60 | 1423 | conn->bytesread=0; |
09e6702a BH |
1424 | } |
1425 | if(!bytes || bytes < 0) { | |
1426 | if(g_logCommonErrors) | |
cd989c87 | 1427 | L<<Logger::Error<<"TCP client "<< conn->d_remote.toString() <<" disconnected after first byte"<<endl; |
bb4bdbaf | 1428 | t_fdm->removeReadFD(fd); |
09e6702a BH |
1429 | return; |
1430 | } | |
1431 | } | |
667f7e60 | 1432 | else if(conn->state==TCPConnection::GETQUESTION) { |
b841314c | 1433 | ssize_t bytes=recv(conn->getFD(), conn->data + conn->bytesread, conn->qlen - conn->bytesread, 0); |
f9d67b41 | 1434 | if(!bytes || bytes < 0 || bytes > std::numeric_limits<std::uint16_t>::max()) { |
cd989c87 | 1435 | L<<Logger::Error<<"TCP client "<< conn->d_remote.toString() <<" disconnected while reading question body"<<endl; |
bb4bdbaf | 1436 | t_fdm->removeReadFD(fd); |
09e6702a BH |
1437 | return; |
1438 | } | |
b841314c | 1439 | conn->bytesread+=(uint16_t)bytes; |
667f7e60 | 1440 | if(conn->bytesread==conn->qlen) { |
bb4bdbaf | 1441 | t_fdm->removeReadFD(fd); // should no longer awake ourselves when there is data to read |
879b3f70 | 1442 | |
f26bf547 | 1443 | DNSComboWriter* dc=nullptr; |
09e6702a | 1444 | try { |
cd989c87 | 1445 | dc=new DNSComboWriter(conn->data, conn->qlen, g_now); |
09e6702a BH |
1446 | } |
1447 | catch(MOADNSException &mde) { | |
3ddb9247 | 1448 | g_stats.clientParseError++; |
4957a608 | 1449 | if(g_logCommonErrors) |
cd989c87 | 1450 | L<<Logger::Error<<"Unable to parse packet from TCP client "<< conn->d_remote.toString() <<endl; |
4957a608 | 1451 | return; |
09e6702a | 1452 | } |
cd989c87 BH |
1453 | dc->d_tcpConnection = conn; // carry the torch |
1454 | dc->setSocket(conn->getFD()); // this is the only time a copy is made of the actual fd | |
09e6702a | 1455 | dc->d_tcp=true; |
cd989c87 | 1456 | dc->setRemote(&conn->d_remote); |
a6147cd2 | 1457 | ComboAddress dest; |
1458 | memset(&dest, 0, sizeof(dest)); | |
1459 | dest.sin4.sin_family = conn->d_remote.sin4.sin_family; | |
1460 | socklen_t len = dest.getSocklen(); | |
1461 | getsockname(conn->getFD(), (sockaddr*)&dest, &len); // if this fails, we're ok with it | |
1462 | dc->setLocal(dest); | |
33dcceba RG |
1463 | DNSName qname; |
1464 | uint16_t qtype=0; | |
1465 | uint16_t qclass=0; | |
1466 | bool needECS = false; | |
67e31ebe | 1467 | string requestorId; |
590388d2 | 1468 | string deviceId; |
aa7929a3 | 1469 | #ifdef HAVE_PROTOBUF |
02b47f43 | 1470 | auto luaconfsLocal = g_luaconfs.getLocal(); |
33dcceba RG |
1471 | if (luaconfsLocal->protobufServer) { |
1472 | needECS = true; | |
1473 | } | |
1474 | #endif | |
1475 | ||
f26bf547 | 1476 | if(needECS || (t_pdl && t_pdl->d_gettag)) { |
33dcceba RG |
1477 | |
1478 | try { | |
00b8cadc | 1479 | std::map<uint16_t, EDNSOptionView> ednsOptions; |
b40562da | 1480 | dc->d_ecsParsed = true; |
00b8cadc | 1481 | dc->d_ecsFound = getQNameAndSubnet(std::string(conn->data, conn->qlen), &qname, &qtype, &qclass, &dc->d_ednssubnet, g_gettagNeedsEDNSOptions ? &ednsOptions : nullptr); |
02b47f43 | 1482 | |
f26bf547 | 1483 | if(t_pdl && t_pdl->d_gettag) { |
33dcceba | 1484 | try { |
590388d2 | 1485 | dc->d_tag = t_pdl->gettag(conn->d_remote, dc->d_ednssubnet.source, dest, qname, qtype, &dc->d_policyTags, dc->d_data, ednsOptions, true, requestorId, deviceId); |
33dcceba RG |
1486 | } |
1487 | catch(std::exception& e) { | |
1488 | if(g_logCommonErrors) | |
1489 | L<<Logger::Warning<<"Error parsing a query packet qname='"<<qname<<"' for tag determination, setting tag=0: "<<e.what()<<endl; | |
1490 | } | |
1491 | } | |
1492 | } | |
1493 | catch(std::exception& e) | |
1494 | { | |
1495 | if(g_logCommonErrors) | |
1496 | L<<Logger::Warning<<"Error parsing a query packet for tag determination, setting tag=0: "<<e.what()<<endl; | |
1497 | } | |
1498 | } | |
1499 | #ifdef HAVE_PROTOBUF | |
4898a348 | 1500 | if(luaconfsLocal->protobufServer || luaconfsLocal->outgoingProtobufServer) { |
67e31ebe | 1501 | dc->d_requestorId = requestorId; |
590388d2 | 1502 | dc->d_deviceId = deviceId; |
02b47f43 | 1503 | dc->d_uuid = (*t_uuidGenerator)(); |
4898a348 | 1504 | } |
02b47f43 | 1505 | |
4898a348 | 1506 | if(luaconfsLocal->protobufServer) { |
02b47f43 | 1507 | try { |
02b47f43 | 1508 | const struct dnsheader* dh = (const struct dnsheader*) conn->data; |
02b47f43 | 1509 | |
b790ef3d | 1510 | if (!luaconfsLocal->protobufTaggedOnly) { |
590388d2 | 1511 | protobufLogQuery(luaconfsLocal->protobufServer, luaconfsLocal->protobufMaskV4, luaconfsLocal->protobufMaskV6, dc->d_uuid, conn->d_remote, dest, dc->d_ednssubnet.source, true, dh->id, conn->qlen, qname, qtype, qclass, dc->d_policyTags, dc->d_requestorId, dc->d_deviceId); |
b790ef3d | 1512 | } |
02b47f43 RG |
1513 | } |
1514 | catch(std::exception& e) { | |
1515 | if(g_logCommonErrors) | |
1516 | L<<Logger::Warning<<"Error parsing a TCP query packet for edns subnet: "<<e.what()<<endl; | |
1517 | } | |
1518 | } | |
aa7929a3 | 1519 | #endif |
879b3f70 | 1520 | if(dc->d_mdp.d_header.qr) { |
4957a608 | 1521 | delete dc; |
048f5db6 | 1522 | g_stats.ignoredCount++; |
4328f463 | 1523 | L<<Logger::Error<<"Ignoring answer from TCP client "<< conn->d_remote.toString() <<" on server socket!"<<endl; |
4957a608 | 1524 | return; |
879b3f70 | 1525 | } |
3abcdab2 PD |
1526 | if(dc->d_mdp.d_header.opcode) { |
1527 | delete dc; | |
048f5db6 | 1528 | g_stats.ignoredCount++; |
4328f463 | 1529 | L<<Logger::Error<<"Ignoring non-query opcode from TCP client "<< conn->d_remote.toString() <<" on server socket!"<<endl; |
3abcdab2 PD |
1530 | return; |
1531 | } | |
09e6702a | 1532 | else { |
4957a608 BH |
1533 | ++g_stats.qcounter; |
1534 | ++g_stats.tcpqcounter; | |
50a5ef72 | 1535 | MT->makeThread(startDoResolve, dc); // deletes dc, will set state to BYTE0 again |
4957a608 | 1536 | return; |
09e6702a BH |
1537 | } |
1538 | } | |
1539 | } | |
1540 | } | |
1541 | ||
6dcd28c3 | 1542 | //! Handle new incoming TCP connection |
d187038c | 1543 | static void handleNewTCPQuestion(int fd, FDMultiplexer::funcparam_t& ) |
09e6702a | 1544 | { |
37d3f960 | 1545 | ComboAddress addr; |
09e6702a | 1546 | socklen_t addrlen=sizeof(addr); |
a683e8bd | 1547 | int newsock=accept(fd, (struct sockaddr*)&addr, &addrlen); |
b841314c | 1548 | if(newsock>=0) { |
85c32340 BH |
1549 | if(MT->numProcesses() > g_maxMThreads) { |
1550 | g_stats.overCapacityDrops++; | |
a7b68ae7 RG |
1551 | try { |
1552 | closesocket(newsock); | |
1553 | } | |
1554 | catch(const PDNSException& e) { | |
1555 | L<<Logger::Error<<"Error closing TCP socket after an over capacity drop: "<<e.reason<<endl; | |
1556 | } | |
85c32340 BH |
1557 | return; |
1558 | } | |
1559 | ||
92011b8f | 1560 | if(t_remotes) |
1561 | t_remotes->push_back(addr); | |
49a699c4 | 1562 | if(t_allowFrom && !t_allowFrom->match(&addr)) { |
3ddb9247 | 1563 | if(!g_quiet) |
4957a608 | 1564 | L<<Logger::Error<<"["<<MT->getTid()<<"] dropping TCP query from "<<addr.toString()<<", address not matched by allow-from"<<endl; |
2914b022 | 1565 | |
09e6702a | 1566 | g_stats.unauthorizedTCP++; |
a7b68ae7 RG |
1567 | try { |
1568 | closesocket(newsock); | |
1569 | } | |
1570 | catch(const PDNSException& e) { | |
1571 | L<<Logger::Error<<"Error closing TCP socket after an ACL drop: "<<e.reason<<endl; | |
1572 | } | |
09e6702a BH |
1573 | return; |
1574 | } | |
bd0289fc | 1575 | if(g_maxTCPPerClient && t_tcpClientCounts->count(addr) && (*t_tcpClientCounts)[addr] >= g_maxTCPPerClient) { |
09e6702a | 1576 | g_stats.tcpClientOverflow++; |
a7b68ae7 RG |
1577 | try { |
1578 | closesocket(newsock); // don't call TCPConnection::closeAndCleanup here - did not enter it in the counts yet! | |
1579 | } | |
1580 | catch(const PDNSException& e) { | |
1581 | L<<Logger::Error<<"Error closing TCP socket after an overflow drop: "<<e.reason<<endl; | |
1582 | } | |
09e6702a BH |
1583 | return; |
1584 | } | |
3ddb9247 | 1585 | |
3897b9e1 | 1586 | setNonBlocking(newsock); |
f26bf547 | 1587 | std::shared_ptr<TCPConnection> tc = std::make_shared<TCPConnection>(newsock, addr); |
cd989c87 | 1588 | tc->state=TCPConnection::BYTE0; |
3ddb9247 | 1589 | |
cd989c87 | 1590 | t_fdm->addReadFD(tc->getFD(), handleRunningTCPQuestion, tc); |
c038218b | 1591 | |
0bff046b | 1592 | struct timeval now; |
c038218b | 1593 | Utility::gettimeofday(&now, 0); |
cd989c87 | 1594 | t_fdm->setReadTTD(tc->getFD(), now, g_tcpTimeout); |
09e6702a BH |
1595 | } |
1596 | } | |
3ddb9247 | 1597 | |
d187038c | 1598 | static string* doProcessUDPQuestion(const std::string& question, const ComboAddress& fromaddr, const ComboAddress& destaddr, struct timeval tv, int fd) |
1bc3c142 | 1599 | { |
183eb877 | 1600 | gettimeofday(&g_now, 0); |
b71b60ee | 1601 | struct timeval diff = g_now - tv; |
1602 | double delta=(diff.tv_sec*1000 + diff.tv_usec/1000.0); | |
183eb877 | 1603 | |
22cf1fda | 1604 | if(tv.tv_sec && delta > 1000.0) { |
b71b60ee | 1605 | g_stats.tooOldDrops++; |
1606 | return 0; | |
1607 | } | |
1608 | ||
1bc3c142 | 1609 | ++g_stats.qcounter; |
d7f10541 BH |
1610 | if(fromaddr.sin4.sin_family==AF_INET6) |
1611 | g_stats.ipv6qcounter++; | |
1bc3c142 BH |
1612 | |
1613 | string response; | |
93f0da94 | 1614 | const struct dnsheader* dh = (struct dnsheader*)question.c_str(); |
49a3500d | 1615 | unsigned int ctag=0; |
f57486f1 | 1616 | uint32_t qhash = 0; |
12aff2e5 | 1617 | bool needECS = false; |
02b47f43 | 1618 | std::vector<std::string> policyTags; |
5fd2577f | 1619 | LuaContext::LuaObject data; |
67e31ebe | 1620 | string requestorId; |
590388d2 | 1621 | string deviceId; |
12aff2e5 | 1622 | #ifdef HAVE_PROTOBUF |
02b47f43 | 1623 | boost::uuids::uuid uniqueId; |
02b47f43 RG |
1624 | auto luaconfsLocal = g_luaconfs.getLocal(); |
1625 | if (luaconfsLocal->protobufServer) { | |
4898a348 | 1626 | uniqueId = (*t_uuidGenerator)(); |
02b47f43 | 1627 | needECS = true; |
4898a348 | 1628 | } else if (luaconfsLocal->outgoingProtobufServer) { |
02b47f43 RG |
1629 | uniqueId = (*t_uuidGenerator)(); |
1630 | } | |
12aff2e5 | 1631 | #endif |
b40562da RG |
1632 | EDNSSubnetOpts ednssubnet; |
1633 | bool ecsFound = false; | |
1634 | bool ecsParsed = false; | |
1bc3c142 | 1635 | try { |
02b47f43 RG |
1636 | DNSName qname; |
1637 | uint16_t qtype=0; | |
1638 | uint16_t qclass=0; | |
1bc3c142 | 1639 | uint32_t age; |
c15ff3df | 1640 | bool qnameParsed=false; |
8f7473d7 | 1641 | #ifdef MALLOC_TRACE |
1642 | /* | |
1643 | static uint64_t last=0; | |
1644 | if(!last) | |
1645 | g_mtracer->clearAllocators(); | |
1646 | cout<<g_mtracer->getAllocs()-last<<" "<<g_mtracer->getNumOut()<<" -- BEGIN TRACE"<<endl; | |
1647 | last=g_mtracer->getAllocs(); | |
1648 | cout<<g_mtracer->topAllocatorsString()<<endl; | |
1649 | g_mtracer->clearAllocators(); | |
1650 | */ | |
1651 | #endif | |
55a1378f | 1652 | |
f26bf547 | 1653 | if(needECS || (t_pdl && t_pdl->d_gettag)) { |
b2eacd67 | 1654 | try { |
00b8cadc RG |
1655 | std::map<uint16_t, EDNSOptionView> ednsOptions; |
1656 | ecsFound = getQNameAndSubnet(question, &qname, &qtype, &qclass, &ednssubnet, g_gettagNeedsEDNSOptions ? &ednsOptions : nullptr); | |
c15ff3df RG |
1657 | qnameParsed = true; |
1658 | ecsParsed = true; | |
12aff2e5 | 1659 | |
f26bf547 | 1660 | if(t_pdl && t_pdl->d_gettag) { |
12aff2e5 | 1661 | try { |
590388d2 | 1662 | ctag=t_pdl->gettag(fromaddr, ednssubnet.source, destaddr, qname, qtype, &policyTags, data, ednsOptions, false, requestorId, deviceId); |
12aff2e5 RG |
1663 | } |
1664 | catch(std::exception& e) { | |
1665 | if(g_logCommonErrors) | |
1666 | L<<Logger::Warning<<"Error parsing a query packet qname='"<<qname<<"' for tag determination, setting tag=0: "<<e.what()<<endl; | |
1667 | } | |
8ea8c302 | 1668 | } |
b2eacd67 | 1669 | } |
1670 | catch(std::exception& e) | |
1671 | { | |
1672 | if(g_logCommonErrors) | |
1673 | L<<Logger::Warning<<"Error parsing a query packet for tag determination, setting tag=0: "<<e.what()<<endl; | |
12aff2e5 | 1674 | } |
12ce523e | 1675 | } |
3ddb9247 | 1676 | |
02b47f43 | 1677 | bool cacheHit = false; |
d9d3f9c1 | 1678 | RecProtoBufMessage pbMessage(DNSProtoBufMessage::DNSProtoBufMessageType::Response); |
02b47f43 RG |
1679 | #ifdef HAVE_PROTOBUF |
1680 | if(luaconfsLocal->protobufServer) { | |
b790ef3d | 1681 | if (!luaconfsLocal->protobufTaggedOnly || !policyTags.empty()) { |
590388d2 | 1682 | protobufLogQuery(luaconfsLocal->protobufServer, luaconfsLocal->protobufMaskV4, luaconfsLocal->protobufMaskV6, uniqueId, fromaddr, destaddr, ednssubnet.source, false, dh->id, question.size(), qname, qtype, qclass, policyTags, requestorId, deviceId); |
b790ef3d | 1683 | } |
d9d3f9c1 RG |
1684 | } |
1685 | #endif /* HAVE_PROTOBUF */ | |
02b47f43 | 1686 | |
c15ff3df RG |
1687 | if (qnameParsed) { |
1688 | cacheHit = (!SyncRes::s_nopacketcache && t_packetCache->getResponsePacket(ctag, question, qname, qtype, qclass, g_now.tv_sec, &response, &age, &qhash, &pbMessage)); | |
1689 | } | |
1690 | else { | |
1691 | cacheHit = (!SyncRes::s_nopacketcache && t_packetCache->getResponsePacket(ctag, question, g_now.tv_sec, &response, &age, &qhash, &pbMessage)); | |
1692 | } | |
1693 | ||
d9d3f9c1 RG |
1694 | if (cacheHit) { |
1695 | #ifdef HAVE_PROTOBUF | |
b790ef3d | 1696 | if(luaconfsLocal->protobufServer && (!luaconfsLocal->protobufTaggedOnly || !pbMessage.getAppliedPolicy().empty() || !pbMessage.getPolicyTags().empty())) { |
e1c8a4bb RG |
1697 | Netmask requestorNM(fromaddr, fromaddr.sin4.sin_family == AF_INET ? luaconfsLocal->protobufMaskV4 : luaconfsLocal->protobufMaskV6); |
1698 | const ComboAddress& requestor = requestorNM.getMaskedNetwork(); | |
1699 | pbMessage.update(uniqueId, &requestor, &destaddr, false, dh->id); | |
b40562da | 1700 | pbMessage.setEDNSSubnet(ednssubnet.source, ednssubnet.source.isIpv4() ? luaconfsLocal->protobufMaskV4 : luaconfsLocal->protobufMaskV6); |
58307a85 | 1701 | pbMessage.setQueryTime(g_now.tv_sec, g_now.tv_usec); |
67e31ebe | 1702 | pbMessage.setRequestorId(requestorId); |
590388d2 | 1703 | pbMessage.setDeviceId(deviceId); |
02b47f43 RG |
1704 | protobufLogResponse(luaconfsLocal->protobufServer, pbMessage); |
1705 | } | |
d9d3f9c1 | 1706 | #endif /* HAVE_PROTOBUF */ |
49a3500d | 1707 | if(!g_quiet) |
1708 | L<<Logger::Notice<<t_id<< " question answered from packet cache tag="<<ctag<<" from "<<fromaddr.toString()<<endl; | |
8f7473d7 | 1709 | |
1bc3c142 BH |
1710 | g_stats.packetCacheHits++; |
1711 | SyncRes::s_queries++; | |
1712 | ageDNSPacket(response, age); | |
b71b60ee | 1713 | struct msghdr msgh; |
1714 | struct iovec iov; | |
1715 | char cbuf[256]; | |
1716 | fillMSGHdr(&msgh, &iov, cbuf, 0, (char*)response.c_str(), response.length(), const_cast<ComboAddress*>(&fromaddr)); | |
2c0af54f PD |
1717 | msgh.msg_control=NULL; |
1718 | ||
cbc03320 | 1719 | if(g_fromtosockets.count(fd)) { |
fbe2a2e0 | 1720 | addCMsgSrcAddr(&msgh, cbuf, &destaddr, 0); |
b71b60ee | 1721 | } |
cbc03320 | 1722 | if(sendmsg(fd, &msgh, 0) < 0 && g_logCommonErrors) |
1723 | L<<Logger::Warning<<"Sending UDP reply to client "<<fromaddr.toStringWithPort()<<" failed with: "<<strerror(errno)<<endl; | |
b71b60ee | 1724 | |
97bee66d | 1725 | if(response.length() >= sizeof(struct dnsheader)) { |
dd079764 RG |
1726 | struct dnsheader tmpdh; |
1727 | memcpy(&tmpdh, response.c_str(), sizeof(tmpdh)); | |
1728 | updateResponseStats(tmpdh.rcode, fromaddr, response.length(), 0, 0); | |
97bee66d | 1729 | } |
08f3f638 | 1730 | g_stats.avgLatencyUsec=(1-1.0/g_latencyStatSize)*g_stats.avgLatencyUsec + 0.0; // we assume 0 usec |
19178da9 | 1731 | g_stats.avgLatencyOursUsec=(1-1.0/g_latencyStatSize)*g_stats.avgLatencyOursUsec + 0.0; // we assume 0 usec |
1bc3c142 BH |
1732 | return 0; |
1733 | } | |
3ddb9247 | 1734 | } |
1bc3c142 BH |
1735 | catch(std::exception& e) { |
1736 | L<<Logger::Error<<"Error processing or aging answer packet: "<<e.what()<<endl; | |
1737 | return 0; | |
1738 | } | |
3ddb9247 | 1739 | |
f26bf547 RG |
1740 | if(t_pdl) { |
1741 | if(t_pdl->ipfilter(fromaddr, destaddr, *dh)) { | |
4ea94941 | 1742 | if(!g_quiet) |
1743 | L<<Logger::Notice<<t_id<<" ["<<MT->getTid()<<"/"<<MT->numProcesses()<<"] DROPPED question from "<<fromaddr.toStringWithPort()<<" based on policy"<<endl; | |
1744 | g_stats.policyDrops++; | |
1745 | return 0; | |
1746 | } | |
1747 | } | |
1748 | ||
1bc3c142 | 1749 | if(MT->numProcesses() > g_maxMThreads) { |
461df9d2 | 1750 | if(!g_quiet) |
854d44e3 | 1751 | L<<Logger::Notice<<t_id<<" ["<<MT->getTid()<<"/"<<MT->numProcesses()<<"] DROPPED question from "<<fromaddr.toStringWithPort()<<", over capacity"<<endl; |
461df9d2 | 1752 | |
1bc3c142 BH |
1753 | g_stats.overCapacityDrops++; |
1754 | return 0; | |
1755 | } | |
3ddb9247 | 1756 | |
1bc3c142 BH |
1757 | DNSComboWriter* dc = new DNSComboWriter(question.c_str(), question.size(), g_now); |
1758 | dc->setSocket(fd); | |
49a3500d | 1759 | dc->d_tag=ctag; |
e9f63d47 | 1760 | dc->d_qhash=qhash; |
49a3500d | 1761 | dc->d_query = question; |
1bc3c142 | 1762 | dc->setRemote(&fromaddr); |
b71b60ee | 1763 | dc->setLocal(destaddr); |
1bc3c142 | 1764 | dc->d_tcp=false; |
02b47f43 | 1765 | dc->d_policyTags = policyTags; |
05c74122 | 1766 | dc->d_data = data; |
b40562da RG |
1767 | dc->d_ecsFound = ecsFound; |
1768 | dc->d_ecsParsed = ecsParsed; | |
1769 | dc->d_ednssubnet = ednssubnet; | |
aa7929a3 | 1770 | #ifdef HAVE_PROTOBUF |
4898a348 | 1771 | if (luaconfsLocal->protobufServer || luaconfsLocal->outgoingProtobufServer) { |
d9d3f9c1 RG |
1772 | dc->d_uuid = uniqueId; |
1773 | } | |
67e31ebe | 1774 | dc->d_requestorId = requestorId; |
590388d2 | 1775 | dc->d_deviceId = deviceId; |
aa7929a3 RG |
1776 | #endif |
1777 | ||
1bc3c142 BH |
1778 | MT->makeThread(startDoResolve, (void*) dc); // deletes dc |
1779 | return 0; | |
3ddb9247 PD |
1780 | } |
1781 | ||
b71b60ee | 1782 | |
d187038c | 1783 | static void handleNewUDPQuestion(int fd, FDMultiplexer::funcparam_t& var) |
5db529f8 | 1784 | { |
a683e8bd | 1785 | ssize_t len; |
5db529f8 BH |
1786 | char data[1500]; |
1787 | ComboAddress fromaddr; | |
b71b60ee | 1788 | struct msghdr msgh; |
1789 | struct iovec iov; | |
1790 | char cbuf[256]; | |
390f1dab | 1791 | bool firstQuery = true; |
b71b60ee | 1792 | |
1793 | fromaddr.sin6.sin6_family=AF_INET6; // this makes sure fromaddr is big enough | |
1794 | fillMSGHdr(&msgh, &iov, cbuf, sizeof(cbuf), data, sizeof(data), &fromaddr); | |
1795 | ||
3ddb9247 | 1796 | for(;;) |
b71b60ee | 1797 | if((len=recvmsg(fd, &msgh, 0)) >= 0) { |
390f1dab RG |
1798 | |
1799 | firstQuery = false; | |
1800 | ||
92011b8f | 1801 | if(t_remotes) |
1802 | t_remotes->push_back(fromaddr); | |
b23b8614 | 1803 | |
49a699c4 | 1804 | if(t_allowFrom && !t_allowFrom->match(&fromaddr)) { |
3ddb9247 | 1805 | if(!g_quiet) |
4957a608 | 1806 | L<<Logger::Error<<"["<<MT->getTid()<<"] dropping UDP query from "<<fromaddr.toString()<<", address not matched by allow-from"<<endl; |
2914b022 | 1807 | |
5db529f8 | 1808 | g_stats.unauthorizedUDP++; |
a9af3782 | 1809 | return; |
5db529f8 | 1810 | } |
15c01deb | 1811 | BOOST_STATIC_ASSERT(offsetof(sockaddr_in, sin_port) == offsetof(sockaddr_in6, sin6_port)); |
81859ba5 | 1812 | if(!fromaddr.sin4.sin_port) { // also works for IPv6 |
3ddb9247 | 1813 | if(!g_quiet) |
81859ba5 | 1814 | L<<Logger::Error<<"["<<MT->getTid()<<"] dropping UDP query from "<<fromaddr.toStringWithPort()<<", can't deal with port 0"<<endl; |
1815 | ||
1816 | g_stats.clientParseError++; // not quite the best place to put it, but needs to go somewhere | |
1817 | return; | |
1818 | } | |
5db529f8 | 1819 | try { |
b23b8614 | 1820 | dnsheader* dh=(dnsheader*)data; |
3ddb9247 | 1821 | |
b23b8614 | 1822 | if(dh->qr) { |
048f5db6 | 1823 | g_stats.ignoredCount++; |
4957a608 BH |
1824 | if(g_logCommonErrors) |
1825 | L<<Logger::Error<<"Ignoring answer from "<<fromaddr.toString()<<" on server socket!"<<endl; | |
5db529f8 | 1826 | } |
3abcdab2 | 1827 | else if(dh->opcode) { |
048f5db6 | 1828 | g_stats.ignoredCount++; |
3abcdab2 PD |
1829 | if(g_logCommonErrors) |
1830 | L<<Logger::Error<<"Ignoring non-query opcode "<<dh->opcode<<" from "<<fromaddr.toString()<<" on server socket!"<<endl; | |
1831 | } | |
5db529f8 | 1832 | else { |
a683e8bd | 1833 | string question(data, (size_t)len); |
b71b60ee | 1834 | struct timeval tv={0,0}; |
1835 | HarvestTimestamp(&msgh, &tv); | |
1836 | ComboAddress dest; | |
c3cecd36 | 1837 | memset(&dest, 0, sizeof(dest)); // this makes sure we ignore this address if not returned by recvmsg above |
a6147cd2 | 1838 | auto loc = rplookup(g_listenSocketsAddresses, fd); |
1839 | if(HarvestDestinationAddress(&msgh, &dest)) { | |
1840 | // but.. need to get port too | |
1841 | if(loc) | |
1842 | dest.sin4.sin_port = loc->sin4.sin_port; | |
1843 | } | |
1844 | else { | |
1845 | if(loc) { | |
1846 | dest = *loc; | |
1847 | } | |
1848 | else { | |
1849 | dest.sin4.sin_family = fromaddr.sin4.sin_family; | |
a683e8bd RG |
1850 | socklen_t slen = dest.getSocklen(); |
1851 | getsockname(fd, (sockaddr*)&dest, &slen); // if this fails, we're ok with it | |
a6147cd2 | 1852 | } |
1853 | } | |
232f0877 | 1854 | if(g_weDistributeQueries) |
b71b60ee | 1855 | distributeAsyncFunction(question, boost::bind(doProcessUDPQuestion, question, fromaddr, dest, tv, fd)); |
232f0877 | 1856 | else |
b71b60ee | 1857 | doProcessUDPQuestion(question, fromaddr, dest, tv, fd); |
5db529f8 BH |
1858 | } |
1859 | } | |
1860 | catch(MOADNSException& mde) { | |
3ddb9247 | 1861 | g_stats.clientParseError++; |
84e66a59 | 1862 | if(g_logCommonErrors) |
4957a608 | 1863 | L<<Logger::Error<<"Unable to parse packet from remote UDP client "<<fromaddr.toString() <<": "<<mde.what()<<endl; |
5db529f8 | 1864 | } |
0b602819 KM |
1865 | catch(std::runtime_error& e) { |
1866 | g_stats.clientParseError++; | |
1867 | if(g_logCommonErrors) | |
1868 | L<<Logger::Error<<"Unable to parse packet from remote UDP client "<<fromaddr.toString() <<": "<<e.what()<<endl; | |
5db529f8 BH |
1869 | } |
1870 | } | |
ac0e821b BH |
1871 | else { |
1872 | // cerr<<t_id<<" had error: "<<stringerror()<<endl; | |
390f1dab | 1873 | if(firstQuery && errno == EAGAIN) |
9326cae1 | 1874 | g_stats.noPacketError++; |
390f1dab | 1875 | |
bf3b0cec | 1876 | break; |
ac0e821b | 1877 | } |
5db529f8 BH |
1878 | } |
1879 | ||
810ff705 | 1880 | static void makeTCPServerSockets(unsigned int threadId) |
9c495589 | 1881 | { |
37d3f960 | 1882 | int fd; |
f28307ad | 1883 | vector<string>locals; |
2e3d8a19 | 1884 | stringtok(locals,::arg()["local-address"]," ,"); |
9c495589 | 1885 | |
f28307ad | 1886 | if(locals.empty()) |
3f81d239 | 1887 | throw PDNSException("No local address specified"); |
3ddb9247 | 1888 | |
f28307ad | 1889 | for(vector<string>::const_iterator i=locals.begin();i!=locals.end();++i) { |
32252594 BH |
1890 | ServiceTuple st; |
1891 | st.port=::arg().asNum("local-port"); | |
1892 | parseService(*i, st); | |
3ddb9247 | 1893 | |
32252594 BH |
1894 | ComboAddress sin; |
1895 | ||
f28307ad | 1896 | memset((char *)&sin,0, sizeof(sin)); |
37d3f960 | 1897 | sin.sin4.sin_family = AF_INET; |
32252594 | 1898 | if(!IpToU32(st.host, (uint32_t*)&sin.sin4.sin_addr.s_addr)) { |
37d3f960 | 1899 | sin.sin6.sin6_family = AF_INET6; |
f71bc087 | 1900 | if(makeIPv6sockaddr(st.host, &sin.sin6) < 0) |
3ddb9247 | 1901 | throw PDNSException("Unable to resolve local address for TCP server on '"+ st.host +"'"); |
37d3f960 BH |
1902 | } |
1903 | ||
1904 | fd=socket(sin.sin6.sin6_family, SOCK_STREAM, 0); | |
3ddb9247 | 1905 | if(fd<0) |
3f81d239 | 1906 | throw PDNSException("Making a TCP server socket for resolver: "+stringerror()); |
f28307ad | 1907 | |
3897b9e1 | 1908 | setCloseOnExec(fd); |
a903b39c | 1909 | |
f28307ad | 1910 | int tmp=1; |
810ff705 | 1911 | if(setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof tmp)<0) { |
f28307ad | 1912 | L<<Logger::Error<<"Setsockopt failed for TCP listening socket"<<endl; |
c8ddb7c2 | 1913 | exit(1); |
f28307ad | 1914 | } |
0dfa94ab | 1915 | if(sin.sin6.sin6_family == AF_INET6 && setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &tmp, sizeof(tmp)) < 0) { |
1916 | L<<Logger::Error<<"Failed to set IPv6 socket to IPv6 only, continuing anyhow: "<<strerror(errno)<<endl; | |
1917 | } | |
1918 | ||
c8ddb7c2 | 1919 | #ifdef TCP_DEFER_ACCEPT |
810ff705 | 1920 | if(setsockopt(fd, SOL_TCP, TCP_DEFER_ACCEPT, &tmp, sizeof tmp) >= 0) { |
37d3f960 | 1921 | if(i==locals.begin()) |
4957a608 | 1922 | L<<Logger::Error<<"Enabled TCP data-ready filter for (slight) DoS protection"<<endl; |
c8ddb7c2 BH |
1923 | } |
1924 | #endif | |
1925 | ||
fec7dd5a SS |
1926 | if( ::arg().mustDo("non-local-bind") ) |
1927 | Utility::setBindAny(AF_INET, fd); | |
1928 | ||
2332f42d | 1929 | #ifdef SO_REUSEPORT |
810ff705 RG |
1930 | if(g_reusePort) { |
1931 | if(setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &tmp, sizeof(tmp)) < 0) | |
2332f42d | 1932 | throw PDNSException("SO_REUSEPORT: "+stringerror()); |
1933 | } | |
1934 | #endif | |
1935 | ||
0735b17e RG |
1936 | if (::arg().asNum("tcp-fast-open") > 0) { |
1937 | #ifdef TCP_FASTOPEN | |
1938 | int fastOpenQueueSize = ::arg().asNum("tcp-fast-open"); | |
1939 | if (setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &fastOpenQueueSize, sizeof fastOpenQueueSize) < 0) { | |
1940 | L<<Logger::Error<<"Failed to enable TCP Fast Open for listening socket: "<<strerror(errno)<<endl; | |
1941 | } | |
1942 | #else | |
1943 | L<<Logger::Warning<<"TCP Fast Open configured but not supported for listening socket"<<endl; | |
1944 | #endif | |
1945 | } | |
1946 | ||
32252594 | 1947 | sin.sin4.sin_port = htons(st.port); |
a683e8bd | 1948 | socklen_t socklen=sin.sin4.sin_family==AF_INET ? sizeof(sin.sin4) : sizeof(sin.sin6); |
3ddb9247 | 1949 | if (::bind(fd, (struct sockaddr *)&sin, socklen )<0) |
3f81d239 | 1950 | throw PDNSException("Binding TCP server socket for "+ st.host +": "+stringerror()); |
3ddb9247 | 1951 | |
3897b9e1 | 1952 | setNonBlocking(fd); |
49a699c4 | 1953 | setSocketSendBuffer(fd, 65000); |
37d3f960 | 1954 | listen(fd, 128); |
810ff705 | 1955 | deferredAdds[threadId].push_back(make_pair(fd, handleNewTCPQuestion)); |
c2136bf0 | 1956 | g_tcpListenSockets.push_back(fd); |
84433b79 | 1957 | // we don't need to update g_listenSocketsAddresses since it doesn't work for TCP/IP: |
1958 | // - fd is not that which we know here, but returned from accept() | |
3ddb9247 | 1959 | if(sin.sin4.sin_family == AF_INET) |
32252594 | 1960 | L<<Logger::Error<<"Listening for TCP queries on "<< sin.toString() <<":"<<st.port<<endl; |
aa136564 | 1961 | else |
32252594 | 1962 | L<<Logger::Error<<"Listening for TCP queries on ["<< sin.toString() <<"]:"<<st.port<<endl; |
f28307ad | 1963 | } |
9c495589 BH |
1964 | } |
1965 | ||
810ff705 | 1966 | static void makeUDPServerSockets(unsigned int threadId) |
288f4aa9 | 1967 | { |
fec7dd5a | 1968 | int one=1; |
f28307ad | 1969 | vector<string>locals; |
2e3d8a19 | 1970 | stringtok(locals,::arg()["local-address"]," ,"); |
288f4aa9 | 1971 | |
f28307ad | 1972 | if(locals.empty()) |
3f81d239 | 1973 | throw PDNSException("No local address specified"); |
3ddb9247 | 1974 | |
f28307ad | 1975 | for(vector<string>::const_iterator i=locals.begin();i!=locals.end();++i) { |
32252594 BH |
1976 | ServiceTuple st; |
1977 | st.port=::arg().asNum("local-port"); | |
1978 | parseService(*i, st); | |
1979 | ||
37d3f960 | 1980 | ComboAddress sin; |
996c89cc | 1981 | |
37d3f960 BH |
1982 | memset(&sin, 0, sizeof(sin)); |
1983 | sin.sin4.sin_family = AF_INET; | |
32252594 | 1984 | if(!IpToU32(st.host.c_str() , (uint32_t*)&sin.sin4.sin_addr.s_addr)) { |
37d3f960 | 1985 | sin.sin6.sin6_family = AF_INET6; |
f71bc087 | 1986 | if(makeIPv6sockaddr(st.host, &sin.sin6) < 0) |
3ddb9247 | 1987 | throw PDNSException("Unable to resolve local address for UDP server on '"+ st.host +"'"); |
37d3f960 | 1988 | } |
3ddb9247 | 1989 | |
bb4bdbaf | 1990 | int fd=socket(sin.sin4.sin_family, SOCK_DGRAM, 0); |
d3b4137e | 1991 | if(fd < 0) { |
3f81d239 | 1992 | throw PDNSException("Making a UDP server socket for resolver: "+netstringerror()); |
d3b4137e | 1993 | } |
915b0c39 AT |
1994 | if (!setSocketTimestamps(fd)) |
1995 | L<<Logger::Warning<<"Unable to enable timestamp reporting for socket"<<endl; | |
0dfa94ab | 1996 | |
b71b60ee | 1997 | if(IsAnyAddress(sin)) { |
cbc03320 | 1998 | if(sin.sin4.sin_family == AF_INET) |
1999 | if(!setsockopt(fd, IPPROTO_IP, GEN_IP_PKTINFO, &one, sizeof(one))) // linux supports this, so why not - might fail on other systems | |
2000 | g_fromtosockets.insert(fd); | |
757d3179 | 2001 | #ifdef IPV6_RECVPKTINFO |
cbc03320 | 2002 | if(sin.sin4.sin_family == AF_INET6) |
2003 | if(!setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one))) | |
2004 | g_fromtosockets.insert(fd); | |
757d3179 | 2005 | #endif |
0dfa94ab | 2006 | if(sin.sin6.sin6_family == AF_INET6 && setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one)) < 0) { |
2007 | L<<Logger::Error<<"Failed to set IPv6 socket to IPv6 only, continuing anyhow: "<<strerror(errno)<<endl; | |
2008 | } | |
b71b60ee | 2009 | } |
fec7dd5a SS |
2010 | if( ::arg().mustDo("non-local-bind") ) |
2011 | Utility::setBindAny(AF_INET6, fd); | |
2012 | ||
3897b9e1 | 2013 | setCloseOnExec(fd); |
a903b39c | 2014 | |
4e9a20e6 | 2015 | setSocketReceiveBuffer(fd, 250000); |
32252594 | 2016 | sin.sin4.sin_port = htons(st.port); |
37d3f960 | 2017 | |
2332f42d | 2018 | |
2573d4a6 | 2019 | #ifdef SO_REUSEPORT |
810ff705 | 2020 | if(g_reusePort) { |
2332f42d | 2021 | if(setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one)) < 0) |
2022 | throw PDNSException("SO_REUSEPORT: "+stringerror()); | |
2023 | } | |
2024 | #endif | |
a683e8bd | 2025 | socklen_t socklen=sin.getSocklen(); |
3ddb9247 | 2026 | if (::bind(fd, (struct sockaddr *)&sin, socklen)<0) |
335da0ba | 2027 | throw PDNSException("Resolver binding to server socket on port "+ std::to_string(st.port) +" for "+ st.host+": "+stringerror()); |
3ddb9247 | 2028 | |
3897b9e1 | 2029 | setNonBlocking(fd); |
c2136bf0 | 2030 | |
810ff705 | 2031 | deferredAdds[threadId].push_back(make_pair(fd, handleNewUDPQuestion)); |
40a3dd64 | 2032 | g_listenSocketsAddresses[fd]=sin; // this is written to only from the startup thread, not from the workers |
3ddb9247 | 2033 | if(sin.sin4.sin_family == AF_INET) |
32252594 | 2034 | L<<Logger::Error<<"Listening for UDP queries on "<< sin.toString() <<":"<<st.port<<endl; |
aa136564 | 2035 | else |
32252594 | 2036 | L<<Logger::Error<<"Listening for UDP queries on ["<< sin.toString() <<"]:"<<st.port<<endl; |
f28307ad | 2037 | } |
c836dc19 | 2038 | } |
caa6eefa | 2039 | |
d187038c | 2040 | static void daemonize(void) |
c836dc19 BH |
2041 | { |
2042 | if(fork()) | |
2043 | exit(0); // bye bye | |
3ddb9247 PD |
2044 | |
2045 | setsid(); | |
c836dc19 | 2046 | |
27a5ead5 | 2047 | int i=open("/dev/null",O_RDWR); /* open stdin */ |
3ddb9247 | 2048 | if(i < 0) |
27a5ead5 BH |
2049 | L<<Logger::Critical<<"Unable to open /dev/null: "<<stringerror()<<endl; |
2050 | else { | |
2051 | dup2(i,0); /* stdin */ | |
2052 | dup2(i,1); /* stderr */ | |
2053 | dup2(i,2); /* stderr */ | |
2054 | close(i); | |
2055 | } | |
288f4aa9 | 2056 | } |
caa6eefa | 2057 | |
d187038c | 2058 | static void usr1Handler(int) |
c75a6a9e BH |
2059 | { |
2060 | statsWanted=true; | |
2061 | } | |
ae1b2e98 | 2062 | |
d187038c | 2063 | static void usr2Handler(int) |
9170fbaf | 2064 | { |
f1f34cc2 | 2065 | g_quiet= !g_quiet; |
2066 | SyncRes::setDefaultLogMode(g_quiet ? SyncRes::LogNone : SyncRes::Log); | |
2067 | ::arg().set("quiet")=g_quiet ? "" : "no"; | |
9170fbaf BH |
2068 | } |
2069 | ||
d187038c | 2070 | static void doStats(void) |
c75a6a9e | 2071 | { |
16beeaa4 BH |
2072 | static time_t lastOutputTime; |
2073 | static uint64_t lastQueryCount; | |
d299d4f5 | 2074 | |
2075 | uint64_t cacheHits = broadcastAccFunction<uint64_t>(pleaseGetCacheHits); | |
2076 | uint64_t cacheMisses = broadcastAccFunction<uint64_t>(pleaseGetCacheMisses); | |
3ddb9247 | 2077 | |
d299d4f5 | 2078 | if(g_stats.qcounter && (cacheHits + cacheMisses) && SyncRes::s_queries && SyncRes::s_outqueries) { |
bd301954 | 2079 | L<<Logger::Notice<<"stats: "<<g_stats.qcounter<<" questions, "<< |
3427fa8a BH |
2080 | broadcastAccFunction<uint64_t>(pleaseGetCacheSize)<< " cache entries, "<< |
2081 | broadcastAccFunction<uint64_t>(pleaseGetNegCacheSize)<<" negative entries, "<< | |
3ddb9247 PD |
2082 | (int)((cacheHits*100.0)/(cacheHits+cacheMisses))<<"% cache hits"<<endl; |
2083 | ||
bd301954 | 2084 | L<<Logger::Notice<<"stats: throttle map: " |
3427fa8a | 2085 | << broadcastAccFunction<uint64_t>(pleaseGetThrottleSize) <<", ns speeds: " |
3ddb9247 | 2086 | << broadcastAccFunction<uint64_t>(pleaseGetNsSpeedsSize)<<endl; |
bd301954 JB |
2087 | L<<Logger::Notice<<"stats: outpacket/query ratio "<<(int)(SyncRes::s_outqueries*100.0/SyncRes::s_queries)<<"%"; |
2088 | L<<Logger::Notice<<", "<<(int)(SyncRes::s_throttledqueries*100.0/(SyncRes::s_outqueries+SyncRes::s_throttledqueries))<<"% throttled, " | |
525b8a7c | 2089 | <<SyncRes::s_nodelegated<<" no-delegation drops"<<endl; |
bd301954 | 2090 | L<<Logger::Notice<<"stats: "<<SyncRes::s_tcpoutqueries<<" outgoing tcp connections, "<< |
3427fa8a | 2091 | broadcastAccFunction<uint64_t>(pleaseGetConcurrentQueries)<<" queries running, "<<SyncRes::s_outgoingtimeouts<<" outgoing timeouts"<<endl; |
81883dcc | 2092 | |
bd301954 | 2093 | //L<<Logger::Notice<<"stats: "<<g_stats.ednsPingMatches<<" ping matches, "<<g_stats.ednsPingMismatches<<" mismatches, "<< |
16beeaa4 | 2094 | //g_stats.noPingOutQueries<<" outqueries w/o ping, "<< g_stats.noEdnsOutQueries<<" w/o EDNS"<<endl; |
3ddb9247 | 2095 | |
bd301954 | 2096 | L<<Logger::Notice<<"stats: " << broadcastAccFunction<uint64_t>(pleaseGetPacketCacheSize) << |
16beeaa4 | 2097 | " packet cache entries, "<<(int)(100.0*broadcastAccFunction<uint64_t>(pleaseGetPacketCacheHits)/SyncRes::s_queries) << "% packet cache hits"<<endl; |
3ddb9247 | 2098 | |
16beeaa4 BH |
2099 | time_t now = time(0); |
2100 | if(lastOutputTime && lastQueryCount && now != lastOutputTime) { | |
bd301954 | 2101 | L<<Logger::Notice<<"stats: "<< (SyncRes::s_queries - lastQueryCount) / (now - lastOutputTime) <<" qps (average over "<< (now - lastOutputTime) << " seconds)"<<endl; |
16beeaa4 BH |
2102 | } |
2103 | lastOutputTime = now; | |
2104 | lastQueryCount = SyncRes::s_queries; | |
c75a6a9e | 2105 | } |
3ddb9247 | 2106 | else if(statsWanted) |
bd301954 | 2107 | L<<Logger::Notice<<"stats: no stats yet!"<<endl; |
7becf07f | 2108 | |
c75a6a9e BH |
2109 | statsWanted=false; |
2110 | } | |
c836dc19 | 2111 | |
29f0b1ce | 2112 | static void houseKeeping(void *) |
c836dc19 | 2113 | { |
3337c2f7 RG |
2114 | static thread_local time_t last_stat, last_rootupdate, last_prune, last_secpoll; |
2115 | static thread_local int cleanCounter=0; | |
2116 | static thread_local bool s_running; // houseKeeping can get suspended in secpoll, and be restarted, which makes us do duplicate work | |
cc59bce6 | 2117 | try { |
2118 | if(s_running) | |
2119 | return; | |
2120 | s_running=true; | |
3ddb9247 | 2121 | |
cc59bce6 | 2122 | struct timeval now; |
2123 | Utility::gettimeofday(&now, 0); | |
3ddb9247 PD |
2124 | |
2125 | if(now.tv_sec - last_prune > (time_t)(5 + t_id)) { | |
cc59bce6 | 2126 | DTime dt; |
2127 | dt.setTimeval(now); | |
a6f7f5fe | 2128 | t_RC->doPrune(g_maxCacheEntries / g_numThreads); // this function is local to a thread, so fine anyhow |
2129 | t_packetCache->doPruneTo(g_maxPacketCacheEntries / g_numWorkerThreads); | |
3ddb9247 | 2130 | |
a6f7f5fe | 2131 | SyncRes::pruneNegCache(g_maxCacheEntries / (g_numWorkerThreads * 10)); |
3ddb9247 | 2132 | |
cc59bce6 | 2133 | if(!((cleanCounter++)%40)) { // this is a full scan! |
2134 | time_t limit=now.tv_sec-300; | |
a712cb56 | 2135 | SyncRes::pruneNSSpeeds(limit); |
cc59bce6 | 2136 | } |
2137 | last_prune=time(0); | |
d67620e4 | 2138 | } |
3ddb9247 | 2139 | |
cc59bce6 | 2140 | if(now.tv_sec - last_rootupdate > 7200) { |
30ee601a | 2141 | int res = SyncRes::getRootNS(g_now, nullptr); |
7836f7b4 PL |
2142 | if (!res) |
2143 | last_rootupdate=now.tv_sec; | |
cc59bce6 | 2144 | } |
3ddb9247 | 2145 | |
cc59bce6 | 2146 | if(!t_id) { |
0ec489bf | 2147 | if(g_statisticsInterval > 0 && now.tv_sec - last_stat >= g_statisticsInterval) { |
cc59bce6 | 2148 | doStats(); |
2149 | last_stat=time(0); | |
2150 | } | |
3ddb9247 | 2151 | |
cc59bce6 | 2152 | if(now.tv_sec - last_secpoll >= 3600) { |
2153 | try { | |
2154 | doSecPoll(&last_secpoll); | |
2155 | } | |
581d4ea3 | 2156 | catch(std::exception& e) |
2157 | { | |
2158 | L<<Logger::Error<<"Exception while performing security poll: "<<e.what()<<endl; | |
2159 | } | |
47e9b74f | 2160 | catch(PDNSException& e) |
2161 | { | |
2162 | L<<Logger::Error<<"Exception while performing security poll: "<<e.reason<<endl; | |
2163 | } | |
d0992a65 CH |
2164 | catch(ImmediateServFailException &e) |
2165 | { | |
2166 | L<<Logger::Error<<"Exception while performing security poll: "<<e.reason<<endl; | |
2167 | } | |
47e9b74f | 2168 | catch(...) |
2169 | { | |
2170 | L<<Logger::Error<<"Exception while performing security poll"<<endl; | |
2171 | } | |
2172 | ||
18b73338 | 2173 | } |
d67620e4 | 2174 | } |
cc59bce6 | 2175 | s_running=false; |
d67620e4 | 2176 | } |
cc59bce6 | 2177 | catch(PDNSException& ae) |
2178 | { | |
2179 | s_running=false; | |
2180 | L<<Logger::Error<<"Fatal error in housekeeping thread: "<<ae.reason<<endl; | |
2181 | throw; | |
2182 | } | |
779828c4 | 2183 | } |
d6d5dea7 | 2184 | |
d187038c | 2185 | static void makeThreadPipes() |
49a699c4 | 2186 | { |
c3828c03 | 2187 | for(unsigned int n=0; n < g_numThreads; ++n) { |
49a699c4 BH |
2188 | struct ThreadPipeSet tps; |
2189 | int fd[2]; | |
2190 | if(pipe(fd) < 0) | |
2191 | unixDie("Creating pipe for inter-thread communications"); | |
3ddb9247 | 2192 | |
49a699c4 BH |
2193 | tps.readToThread = fd[0]; |
2194 | tps.writeToThread = fd[1]; | |
3ddb9247 | 2195 | |
49a699c4 BH |
2196 | if(pipe(fd) < 0) |
2197 | unixDie("Creating pipe for inter-thread communications"); | |
2198 | tps.readFromThread = fd[0]; | |
2199 | tps.writeFromThread = fd[1]; | |
3ddb9247 | 2200 | |
49a699c4 BH |
2201 | g_pipes.push_back(tps); |
2202 | } | |
2203 | } | |
2204 | ||
00c9b8c1 BH |
2205 | struct ThreadMSG |
2206 | { | |
2207 | pipefunc_t func; | |
2208 | bool wantAnswer; | |
2209 | }; | |
2210 | ||
49a699c4 BH |
2211 | void broadcastFunction(const pipefunc_t& func, bool skipSelf) |
2212 | { | |
49a699c4 | 2213 | unsigned int n = 0; |
1dc8f4d0 | 2214 | for(ThreadPipeSet& tps : g_pipes) |
49a699c4 BH |
2215 | { |
2216 | if(n++ == t_id) { | |
2217 | if(!skipSelf) | |
2218 | func(); // don't write to ourselves! | |
2219 | continue; | |
2220 | } | |
3ddb9247 | 2221 | |
00c9b8c1 BH |
2222 | ThreadMSG* tmsg = new ThreadMSG(); |
2223 | tmsg->func = func; | |
2224 | tmsg->wantAnswer = true; | |
b841314c RG |
2225 | if(write(tps.writeToThread, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) { |
2226 | delete tmsg; | |
49a699c4 | 2227 | unixDie("write to thread pipe returned wrong size or error"); |
b841314c | 2228 | } |
3ddb9247 | 2229 | |
49a699c4 BH |
2230 | string* resp; |
2231 | if(read(tps.readFromThread, &resp, sizeof(resp)) != sizeof(resp)) | |
2232 | unixDie("read from thread pipe returned wrong size or error"); | |
3ddb9247 | 2233 | |
49a699c4 BH |
2234 | if(resp) { |
2235 | // cerr <<"got response: " << *resp << endl; | |
2236 | delete resp; | |
2237 | } | |
2238 | } | |
2239 | } | |
06ea9015 | 2240 | |
8171ab83 | 2241 | void distributeAsyncFunction(const string& packet, const pipefunc_t& func) |
00c9b8c1 | 2242 | { |
8171ab83 | 2243 | unsigned int hash = hashQuestion(packet.c_str(), packet.length(), g_disthashseed); |
06ea9015 | 2244 | unsigned int target = 1 + (hash % (g_pipes.size()-1)); |
2245 | ||
00c9b8c1 BH |
2246 | if(target == t_id) { |
2247 | func(); | |
2248 | return; | |
2249 | } | |
3ddb9247 | 2250 | ThreadPipeSet& tps = g_pipes[target]; |
00c9b8c1 BH |
2251 | ThreadMSG* tmsg = new ThreadMSG(); |
2252 | tmsg->func = func; | |
2253 | tmsg->wantAnswer = false; | |
3ddb9247 | 2254 | |
b841314c RG |
2255 | if(write(tps.writeToThread, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) { |
2256 | delete tmsg; | |
3ddb9247 | 2257 | unixDie("write to thread pipe returned wrong size or error"); |
b841314c | 2258 | } |
00c9b8c1 | 2259 | } |
3427fa8a | 2260 | |
d187038c | 2261 | static void handlePipeRequest(int fd, FDMultiplexer::funcparam_t& var) |
49a699c4 | 2262 | { |
f26bf547 | 2263 | ThreadMSG* tmsg = nullptr; |
3ddb9247 PD |
2264 | |
2265 | if(read(fd, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) { // fd == readToThread | |
49a699c4 BH |
2266 | unixDie("read from thread pipe returned wrong size or error"); |
2267 | } | |
3ddb9247 | 2268 | |
2f22827a | 2269 | void *resp=0; |
2270 | try { | |
2271 | resp = tmsg->func(); | |
2272 | } | |
2273 | catch(std::exception& e) { | |
6d2010a8 | 2274 | if(g_logCommonErrors) |
2275 | L<<Logger::Error<<"PIPE function we executed created exception: "<<e.what()<<endl; // but what if they wanted an answer.. we send 0 | |
2f22827a | 2276 | } |
2277 | catch(PDNSException& e) { | |
6d2010a8 | 2278 | if(g_logCommonErrors) |
2279 | L<<Logger::Error<<"PIPE function we executed created PDNS exception: "<<e.reason<<endl; // but what if they wanted an answer.. we send 0 | |
2f22827a | 2280 | } |
d7c676a5 RG |
2281 | if(tmsg->wantAnswer) { |
2282 | if(write(g_pipes[t_id].writeFromThread, &resp, sizeof(resp)) != sizeof(resp)) { | |
2283 | delete tmsg; | |
00c9b8c1 | 2284 | unixDie("write to thread pipe returned wrong size or error"); |
d7c676a5 RG |
2285 | } |
2286 | } | |
3ddb9247 | 2287 | |
00c9b8c1 | 2288 | delete tmsg; |
49a699c4 | 2289 | } |
09e6702a | 2290 | |
13034931 BH |
2291 | template<class T> void *voider(const boost::function<T*()>& func) |
2292 | { | |
2293 | return func(); | |
2294 | } | |
2295 | ||
b3b5459d BH |
2296 | vector<ComboAddress>& operator+=(vector<ComboAddress>&a, const vector<ComboAddress>& b) |
2297 | { | |
2298 | a.insert(a.end(), b.begin(), b.end()); | |
2299 | return a; | |
2300 | } | |
2301 | ||
92011b8f | 2302 | vector<pair<string, uint16_t> >& operator+=(vector<pair<string, uint16_t> >&a, const vector<pair<string, uint16_t> >& b) |
2303 | { | |
2304 | a.insert(a.end(), b.begin(), b.end()); | |
2305 | return a; | |
2306 | } | |
2307 | ||
3ddb9247 PD |
2308 | vector<pair<DNSName, uint16_t> >& operator+=(vector<pair<DNSName, uint16_t> >&a, const vector<pair<DNSName, uint16_t> >& b) |
2309 | { | |
2310 | a.insert(a.end(), b.begin(), b.end()); | |
2311 | return a; | |
2312 | } | |
2313 | ||
92011b8f | 2314 | |
13034931 | 2315 | template<class T> T broadcastAccFunction(const boost::function<T*()>& func, bool skipSelf) |
3427fa8a BH |
2316 | { |
2317 | unsigned int n = 0; | |
2318 | T ret=T(); | |
1dc8f4d0 | 2319 | for(ThreadPipeSet& tps : g_pipes) |
3427fa8a BH |
2320 | { |
2321 | if(n++ == t_id) { | |
2322 | if(!skipSelf) { | |
2323 | T* resp = (T*)func(); // don't write to ourselves! | |
2324 | if(resp) { | |
2325 | //~ cerr <<"got direct: " << *resp << endl; | |
2326 | ret += *resp; | |
2327 | delete resp; | |
2328 | } | |
2329 | } | |
2330 | continue; | |
2331 | } | |
3ddb9247 | 2332 | |
00c9b8c1 BH |
2333 | ThreadMSG* tmsg = new ThreadMSG(); |
2334 | tmsg->func = boost::bind(voider<T>, func); | |
2335 | tmsg->wantAnswer = true; | |
3ddb9247 | 2336 | |
b841314c RG |
2337 | if(write(tps.writeToThread, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) { |
2338 | delete tmsg; | |
3427fa8a | 2339 | unixDie("write to thread pipe returned wrong size or error"); |
b841314c | 2340 | } |
3ddb9247 | 2341 | |
3427fa8a BH |
2342 | T* resp; |
2343 | if(read(tps.readFromThread, &resp, sizeof(resp)) != sizeof(resp)) | |
2344 | unixDie("read from thread pipe returned wrong size or error"); | |
3ddb9247 | 2345 | |
3427fa8a BH |
2346 | if(resp) { |
2347 | //~ cerr <<"got response: " << *resp << endl; | |
2348 | ret += *resp; | |
2349 | delete resp; | |
2350 | } | |
2351 | } | |
2352 | return ret; | |
2353 | } | |
2354 | ||
13034931 BH |
2355 | template string broadcastAccFunction(const boost::function<string*()>& fun, bool skipSelf); // explicit instantiation |
2356 | template uint64_t broadcastAccFunction(const boost::function<uint64_t*()>& fun, bool skipSelf); // explicit instantiation | |
b3b5459d | 2357 | template vector<ComboAddress> broadcastAccFunction(const boost::function<vector<ComboAddress> *()>& fun, bool skipSelf); // explicit instantiation |
3ddb9247 | 2358 | template vector<pair<DNSName,uint16_t> > broadcastAccFunction(const boost::function<vector<pair<DNSName, uint16_t> > *()>& fun, bool skipSelf); // explicit instantiation |
3427fa8a | 2359 | |
d187038c | 2360 | static void handleRCC(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a BH |
2361 | { |
2362 | string remote; | |
2363 | string msg=s_rcc.recv(&remote); | |
2364 | RecursorControlParser rcp; | |
2365 | RecursorControlParser::func_t* command; | |
3ddb9247 | 2366 | |
09e6702a | 2367 | string answer=rcp.getAnswer(msg, &command); |
f0f3f0b0 PL |
2368 | |
2369 | // If we are inside a chroot, we need to strip | |
2370 | if (!arg()["chroot"].empty()) { | |
a683e8bd | 2371 | size_t len = arg()["chroot"].length(); |
f0f3f0b0 PL |
2372 | remote = remote.substr(len); |
2373 | } | |
2374 | ||
ab5c053d BH |
2375 | try { |
2376 | s_rcc.send(answer, &remote); | |
2377 | command(); | |
2378 | } | |
fdbf35ac | 2379 | catch(std::exception& e) { |
ab5c053d BH |
2380 | L<<Logger::Error<<"Error dealing with control socket request: "<<e.what()<<endl; |
2381 | } | |
3f81d239 | 2382 | catch(PDNSException& ae) { |
ab5c053d BH |
2383 | L<<Logger::Error<<"Error dealing with control socket request: "<<ae.reason<<endl; |
2384 | } | |
09e6702a BH |
2385 | } |
2386 | ||
d187038c | 2387 | static void handleTCPClientReadable(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 2388 | { |
0b18b22e | 2389 | PacketID* pident=any_cast<PacketID>(&var); |
667f7e60 | 2390 | // cerr<<"handleTCPClientReadable called for fd "<<fd<<", pident->inNeeded: "<<pident->inNeeded<<", "<<pident->sock->getHandle()<<endl; |
09e6702a | 2391 | |
667f7e60 | 2392 | shared_array<char> buffer(new char[pident->inNeeded]); |
09e6702a | 2393 | |
a683e8bd | 2394 | ssize_t ret=recv(fd, buffer.get(), pident->inNeeded,0); |
09e6702a | 2395 | if(ret > 0) { |
667f7e60 | 2396 | pident->inMSG.append(&buffer[0], &buffer[ret]); |
a683e8bd | 2397 | pident->inNeeded-=(size_t)ret; |
825fa717 | 2398 | if(!pident->inNeeded || pident->inIncompleteOkay) { |
667f7e60 BH |
2399 | // cerr<<"Got entire load of "<<pident->inMSG.size()<<" bytes"<<endl; |
2400 | PacketID pid=*pident; | |
2401 | string msg=pident->inMSG; | |
3ddb9247 | 2402 | |
bb4bdbaf | 2403 | t_fdm->removeReadFD(fd); |
3ddb9247 | 2404 | MT->sendEvent(pid, &msg); |
09e6702a BH |
2405 | } |
2406 | else { | |
667f7e60 | 2407 | // cerr<<"Still have "<<pident->inNeeded<<" left to go"<<endl; |
09e6702a BH |
2408 | } |
2409 | } | |
2410 | else { | |
667f7e60 | 2411 | PacketID tmp=*pident; |
bb4bdbaf | 2412 | t_fdm->removeReadFD(fd); // pident might now be invalid (it isn't, but still) |
09e6702a BH |
2413 | string empty; |
2414 | MT->sendEvent(tmp, &empty); // this conveys error status | |
2415 | } | |
2416 | } | |
2417 | ||
d187038c | 2418 | static void handleTCPClientWritable(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 2419 | { |
0b18b22e | 2420 | PacketID* pid=any_cast<PacketID>(&var); |
a683e8bd | 2421 | ssize_t ret=send(fd, pid->outMSG.c_str() + pid->outPos, pid->outMSG.size() - pid->outPos,0); |
09e6702a | 2422 | if(ret > 0) { |
a683e8bd | 2423 | pid->outPos+=(ssize_t)ret; |
667f7e60 BH |
2424 | if(pid->outPos==pid->outMSG.size()) { |
2425 | PacketID tmp=*pid; | |
bb4bdbaf | 2426 | t_fdm->removeWriteFD(fd); |
09e6702a BH |
2427 | MT->sendEvent(tmp, &tmp.outMSG); // send back what we sent to convey everything is ok |
2428 | } | |
2429 | } | |
2430 | else { // error or EOF | |
667f7e60 | 2431 | PacketID tmp(*pid); |
bb4bdbaf | 2432 | t_fdm->removeWriteFD(fd); |
09e6702a | 2433 | string sent; |
998a4334 | 2434 | MT->sendEvent(tmp, &sent); // we convey error status by sending empty string |
09e6702a BH |
2435 | } |
2436 | } | |
2437 | ||
34801ab1 | 2438 | // resend event to everybody chained onto it |
d187038c | 2439 | static void doResends(MT_t::waiters_t::iterator& iter, PacketID resend, const string& content) |
34801ab1 BH |
2440 | { |
2441 | if(iter->key.chain.empty()) | |
2442 | return; | |
e27e91a8 | 2443 | // cerr<<"doResends called!\n"; |
34801ab1 BH |
2444 | for(PacketID::chain_t::iterator i=iter->key.chain.begin(); i != iter->key.chain.end() ; ++i) { |
2445 | resend.fd=-1; | |
2446 | resend.id=*i; | |
e27e91a8 | 2447 | // cerr<<"\tResending "<<content.size()<<" bytes for fd="<<resend.fd<<" and id="<<resend.id<<endl; |
4665c31e | 2448 | |
34801ab1 BH |
2449 | MT->sendEvent(resend, &content); |
2450 | g_stats.chainResends++; | |
34801ab1 BH |
2451 | } |
2452 | } | |
2453 | ||
d187038c | 2454 | static void handleUDPServerResponse(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 2455 | { |
600fc20b | 2456 | PacketID pid=any_cast<PacketID>(var); |
a683e8bd | 2457 | ssize_t len; |
e45beeda | 2458 | char data[g_outgoingEDNSBufsize]; |
996c89cc | 2459 | ComboAddress fromaddr; |
09e6702a BH |
2460 | socklen_t addrlen=sizeof(fromaddr); |
2461 | ||
998a4334 | 2462 | len=recvfrom(fd, data, sizeof(data), 0, (sockaddr *)&fromaddr, &addrlen); |
c1da7976 | 2463 | |
a683e8bd | 2464 | if(len < (ssize_t) sizeof(dnsheader)) { |
998a4334 | 2465 | if(len < 0) |
996c89cc | 2466 | ; // cerr<<"Error on fd "<<fd<<": "<<stringerror()<<"\n"; |
09e6702a | 2467 | else { |
3ddb9247 | 2468 | g_stats.serverParseError++; |
09e6702a | 2469 | if(g_logCommonErrors) |
85db02c5 | 2470 | L<<Logger::Error<<"Unable to parse packet from remote UDP server "<< fromaddr.toString() << |
e44d9fa7 | 2471 | ": packet smaller than DNS header"<<endl; |
998a4334 | 2472 | } |
34801ab1 | 2473 | |
49a699c4 | 2474 | t_udpclientsocks->returnSocket(fd); |
34801ab1 BH |
2475 | string empty; |
2476 | ||
2477 | MT_t::waiters_t::iterator iter=MT->d_waiters.find(pid); | |
3ddb9247 | 2478 | if(iter != MT->d_waiters.end()) |
34801ab1 | 2479 | doResends(iter, pid, empty); |
3ddb9247 | 2480 | |
34801ab1 | 2481 | MT->sendEvent(pid, &empty); // this denotes error (does lookup again.. at least L1 will be hot) |
998a4334 | 2482 | return; |
3ddb9247 | 2483 | } |
998a4334 BH |
2484 | |
2485 | dnsheader dh; | |
2486 | memcpy(&dh, data, sizeof(dh)); | |
3ddb9247 | 2487 | |
6da3b3ad PD |
2488 | PacketID pident; |
2489 | pident.remote=fromaddr; | |
2490 | pident.id=dh.id; | |
2491 | pident.fd=fd; | |
34801ab1 | 2492 | |
33a928af | 2493 | if(!dh.qr && g_logCommonErrors) { |
854d44e3 | 2494 | L<<Logger::Notice<<"Not taking data from question on outgoing socket from "<< fromaddr.toStringWithPort() <<endl; |
6da3b3ad PD |
2495 | } |
2496 | ||
2497 | if(!dh.qdcount || // UPC, Nominum, very old BIND on FormErr, NSD | |
2498 | !dh.qr) { // one weird server | |
2499 | pident.domain.clear(); | |
2500 | pident.type = 0; | |
2501 | } | |
2502 | else { | |
2503 | try { | |
0b31e67e | 2504 | if(len > 12) |
2505 | pident.domain=DNSName(data, len, 12, false, &pident.type); // don't copy this from above - we need to do the actual read | |
6da3b3ad PD |
2506 | } |
2507 | catch(std::exception& e) { | |
2508 | g_stats.serverParseError++; // won't be fed to lwres.cc, so we have to increment | |
0b31e67e | 2509 | L<<Logger::Warning<<"Error in packet from remote nameserver "<< fromaddr.toStringWithPort() << ": "<<e.what() << endl; |
6da3b3ad | 2510 | return; |
34801ab1 | 2511 | } |
6da3b3ad PD |
2512 | } |
2513 | string packet; | |
2514 | packet.assign(data, len); | |
34801ab1 | 2515 | |
6da3b3ad PD |
2516 | MT_t::waiters_t::iterator iter=MT->d_waiters.find(pident); |
2517 | if(iter != MT->d_waiters.end()) { | |
2518 | doResends(iter, pident, packet); | |
2519 | } | |
c1da7976 | 2520 | |
6da3b3ad | 2521 | retryWithName: |
4957a608 | 2522 | |
6da3b3ad PD |
2523 | if(!MT->sendEvent(pident, &packet)) { |
2524 | // 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 | |
2525 | for(MT_t::waiters_t::iterator mthread=MT->d_waiters.begin(); mthread!=MT->d_waiters.end(); ++mthread) { | |
2526 | if(pident.fd==mthread->key.fd && mthread->key.remote==pident.remote && mthread->key.type == pident.type && | |
e325f20c | 2527 | pident.domain == mthread->key.domain) { |
6da3b3ad | 2528 | mthread->key.nearMisses++; |
998a4334 | 2529 | } |
6da3b3ad PD |
2530 | |
2531 | // be a bit paranoid here since we're weakening our matching | |
3ddb9247 | 2532 | if(pident.domain.empty() && !mthread->key.domain.empty() && !pident.type && mthread->key.type && |
6da3b3ad PD |
2533 | pident.id == mthread->key.id && mthread->key.remote == pident.remote) { |
2534 | // cerr<<"Empty response, rest matches though, sending to a waiter"<<endl; | |
2535 | pident.domain = mthread->key.domain; | |
2536 | pident.type = mthread->key.type; | |
2537 | goto retryWithName; // note that this only passes on an error, lwres will still reject the packet | |
d4fb76e9 | 2538 | } |
09e6702a | 2539 | } |
6da3b3ad PD |
2540 | g_stats.unexpectedCount++; // if we made it here, it really is an unexpected answer |
2541 | if(g_logCommonErrors) { | |
8a464ee3 | 2542 | L<<Logger::Warning<<"Discarding unexpected packet from "<<fromaddr.toStringWithPort()<<": "<< (pident.domain.empty() ? "<empty>" : pident.domain.toString())<<", "<<pident.type<<", "<<MT->d_waiters.size()<<" waiters"<<endl; |
d8f6d49f | 2543 | } |
09e6702a | 2544 | } |
6da3b3ad PD |
2545 | else if(fd >= 0) { |
2546 | t_udpclientsocks->returnSocket(fd); | |
2547 | } | |
09e6702a BH |
2548 | } |
2549 | ||
1f4abb20 BH |
2550 | FDMultiplexer* getMultiplexer() |
2551 | { | |
2552 | FDMultiplexer* ret; | |
f26bf547 | 2553 | for(const auto& i : FDMultiplexer::getMultiplexerMap()) { |
1f4abb20 | 2554 | try { |
f26bf547 | 2555 | ret=i.second(); |
1f4abb20 BH |
2556 | return ret; |
2557 | } | |
98d0ee4a | 2558 | catch(FDMultiplexerException &fe) { |
0a7f24cb | 2559 | L<<Logger::Error<<"Non-fatal error initializing possible multiplexer ("<<fe.what()<<"), falling back"<<endl; |
98d0ee4a BH |
2560 | } |
2561 | catch(...) { | |
2562 | L<<Logger::Error<<"Non-fatal error initializing possible multiplexer"<<endl; | |
2563 | } | |
1f4abb20 BH |
2564 | } |
2565 | L<<Logger::Error<<"No working multiplexer found!"<<endl; | |
2566 | exit(1); | |
2567 | } | |
2568 | ||
3ddb9247 | 2569 | |
d187038c | 2570 | static string* doReloadLuaScript() |
4485aa35 | 2571 | { |
674cf0f6 | 2572 | string fname= ::arg()["lua-dns-script"]; |
4485aa35 | 2573 | try { |
674cf0f6 | 2574 | if(fname.empty()) { |
f26bf547 | 2575 | t_pdl.reset(); |
674cf0f6 | 2576 | L<<Logger::Error<<t_id<<" Unloaded current lua script"<<endl; |
0f39c1a3 | 2577 | return new string("unloaded\n"); |
4485aa35 BH |
2578 | } |
2579 | else { | |
9694e14f AT |
2580 | t_pdl = std::make_shared<RecursorLua4>(); |
2581 | t_pdl->loadFile(fname); | |
4485aa35 BH |
2582 | } |
2583 | } | |
fdbf35ac | 2584 | catch(std::exception& e) { |
674cf0f6 | 2585 | L<<Logger::Error<<t_id<<" Retaining current script, error from '"<<fname<<"': "<< e.what() <<endl; |
0f39c1a3 | 2586 | return new string("retaining current script, error from '"+fname+"': "+e.what()+"\n"); |
4485aa35 | 2587 | } |
3ddb9247 | 2588 | |
674cf0f6 | 2589 | L<<Logger::Warning<<t_id<<" (Re)loaded lua script from '"<<fname<<"'"<<endl; |
0f39c1a3 | 2590 | return new string("(re)loaded '"+fname+"'\n"); |
4485aa35 BH |
2591 | } |
2592 | ||
49a699c4 BH |
2593 | string doQueueReloadLuaScript(vector<string>::const_iterator begin, vector<string>::const_iterator end) |
2594 | { | |
3ddb9247 | 2595 | if(begin != end) |
49a699c4 | 2596 | ::arg().set("lua-dns-script") = *begin; |
3ddb9247 | 2597 | |
0f39c1a3 | 2598 | return broadcastAccFunction<string>(doReloadLuaScript); |
3ddb9247 | 2599 | } |
49a699c4 | 2600 | |
d187038c | 2601 | static string* pleaseUseNewTraceRegex(const std::string& newRegex) |
77499b05 BH |
2602 | try |
2603 | { | |
2604 | if(newRegex.empty()) { | |
f26bf547 | 2605 | t_traceRegex.reset(); |
77499b05 BH |
2606 | return new string("unset\n"); |
2607 | } | |
2608 | else { | |
f26bf547 | 2609 | t_traceRegex = std::make_shared<Regex>(newRegex); |
77499b05 BH |
2610 | return new string("ok\n"); |
2611 | } | |
2612 | } | |
3f81d239 | 2613 | catch(PDNSException& ae) |
77499b05 BH |
2614 | { |
2615 | return new string(ae.reason+"\n"); | |
2616 | } | |
2617 | ||
2618 | string doTraceRegex(vector<string>::const_iterator begin, vector<string>::const_iterator end) | |
2619 | { | |
2620 | return broadcastAccFunction<string>(boost::bind(pleaseUseNewTraceRegex, begin!=end ? *begin : "")); | |
2621 | } | |
2622 | ||
4e9a20e6 | 2623 | static void checkLinuxIPv6Limits() |
2624 | { | |
2625 | #ifdef __linux__ | |
2626 | string line; | |
2627 | if(readFileIfThere("/proc/sys/net/ipv6/route/max_size", &line)) { | |
335da0ba | 2628 | int lim=std::stoi(line); |
4e9a20e6 | 2629 | if(lim < 16384) { |
36849ff2 | 2630 | L<<Logger::Error<<"If using IPv6, please raise sysctl net.ipv6.route.max_size, currently set to "<<lim<<" which is < 16384"<<endl; |
4e9a20e6 | 2631 | } |
2632 | } | |
2633 | #endif | |
2634 | } | |
36849ff2 | 2635 | static void checkOrFixFDS() |
4e9a20e6 | 2636 | { |
c0063e60 | 2637 | unsigned int availFDs=getFilenumLimit(); |
2638 | unsigned int wantFDs = g_maxMThreads * g_numWorkerThreads +25; // even healthier margin then before | |
2639 | ||
2640 | if(wantFDs > availFDs) { | |
067ad20e | 2641 | unsigned int hardlimit= getFilenumLimit(true); |
2642 | if(hardlimit >= wantFDs) { | |
c0063e60 | 2643 | setFilenumLimit(wantFDs); |
2644 | L<<Logger::Warning<<"Raised soft limit on number of filedescriptors to "<<wantFDs<<" to match max-mthreads and threads settings"<<endl; | |
36849ff2 | 2645 | } |
2646 | else { | |
067ad20e | 2647 | int newval = (hardlimit - 25) / g_numWorkerThreads; |
2648 | L<<Logger::Warning<<"Insufficient number of filedescriptors available for max-mthreads*threads setting! ("<<hardlimit<<" < "<<wantFDs<<"), reducing max-mthreads to "<<newval<<endl; | |
36849ff2 | 2649 | g_maxMThreads = newval; |
067ad20e | 2650 | setFilenumLimit(hardlimit); |
36849ff2 | 2651 | } |
2652 | } | |
4e9a20e6 | 2653 | } |
77499b05 | 2654 | |
d187038c | 2655 | static void* recursorThread(void*); |
51e2144e | 2656 | |
f26bf547 | 2657 | static void* pleaseSupplantACLs(std::shared_ptr<NetmaskGroup> ng) |
49a699c4 BH |
2658 | { |
2659 | t_allowFrom = ng; | |
f26bf547 | 2660 | return nullptr; |
49a699c4 BH |
2661 | } |
2662 | ||
dbd23fc2 BH |
2663 | int g_argc; |
2664 | char** g_argv; | |
2665 | ||
18af64a8 | 2666 | void parseACLs() |
f7c1d4e3 | 2667 | { |
18af64a8 | 2668 | static bool l_initialized; |
3ddb9247 | 2669 | |
49a699c4 | 2670 | if(l_initialized) { // only reload configuration file on second call |
18af64a8 | 2671 | string configname=::arg()["config-dir"]+"/recursor.conf"; |
3e63da83 JR |
2672 | if(::arg()["config-name"]!="") { |
2673 | configname=::arg()["config-dir"]+"/recursor-"+::arg()["config-name"]+".conf"; | |
2674 | } | |
18af64a8 | 2675 | cleanSlashes(configname); |
3ddb9247 PD |
2676 | |
2677 | if(!::arg().preParseFile(configname.c_str(), "allow-from-file")) | |
7e818521 | 2678 | throw runtime_error("Unable to re-parse configuration file '"+configname+"'"); |
49a699c4 | 2679 | ::arg().preParseFile(configname.c_str(), "allow-from", LOCAL_NETS); |
242b90e1 | 2680 | ::arg().preParseFile(configname.c_str(), "include-dir"); |
829849d6 AT |
2681 | ::arg().preParse(g_argc, g_argv, "include-dir"); |
2682 | ||
2683 | // then process includes | |
2684 | std::vector<std::string> extraConfigs; | |
242b90e1 AT |
2685 | ::arg().gatherIncludes(extraConfigs); |
2686 | ||
1dc8f4d0 | 2687 | for(const std::string& fn : extraConfigs) { |
7e818521 | 2688 | if(!::arg().preParseFile(fn.c_str(), "allow-from-file", ::arg()["allow-from-file"])) |
2689 | throw runtime_error("Unable to re-parse configuration file include '"+fn+"'"); | |
2690 | if(!::arg().preParseFile(fn.c_str(), "allow-from", ::arg()["allow-from"])) | |
2691 | throw runtime_error("Unable to re-parse configuration file include '"+fn+"'"); | |
829849d6 | 2692 | } |
ca2c884c AT |
2693 | |
2694 | ::arg().preParse(g_argc, g_argv, "allow-from-file"); | |
2695 | ::arg().preParse(g_argc, g_argv, "allow-from"); | |
f27e6356 | 2696 | } |
49a699c4 | 2697 | |
f26bf547 RG |
2698 | std::shared_ptr<NetmaskGroup> oldAllowFrom = t_allowFrom; |
2699 | std::shared_ptr<NetmaskGroup> allowFrom = std::make_shared<NetmaskGroup>(); | |
3ddb9247 | 2700 | |
2c95fc65 BH |
2701 | if(!::arg()["allow-from-file"].empty()) { |
2702 | string line; | |
2c95fc65 BH |
2703 | ifstream ifs(::arg()["allow-from-file"].c_str()); |
2704 | if(!ifs) { | |
9c61b9d0 | 2705 | throw runtime_error("Could not open '"+::arg()["allow-from-file"]+"': "+stringerror()); |
2c95fc65 BH |
2706 | } |
2707 | ||
2708 | string::size_type pos; | |
2709 | while(getline(ifs,line)) { | |
2710 | pos=line.find('#'); | |
2711 | if(pos!=string::npos) | |
2712 | line.resize(pos); | |
2713 | trim(line); | |
2714 | if(line.empty()) | |
2715 | continue; | |
2716 | ||
18af64a8 | 2717 | allowFrom->addMask(line); |
2c95fc65 | 2718 | } |
49a699c4 | 2719 | L<<Logger::Warning<<"Done parsing " << allowFrom->size() <<" allow-from ranges from file '"<<::arg()["allow-from-file"]<<"' - overriding 'allow-from' setting"<<endl; |
2c95fc65 BH |
2720 | } |
2721 | else if(!::arg()["allow-from"].empty()) { | |
f7c1d4e3 BH |
2722 | vector<string> ips; |
2723 | stringtok(ips, ::arg()["allow-from"], ", "); | |
3ddb9247 | 2724 | |
f7c1d4e3 BH |
2725 | L<<Logger::Warning<<"Only allowing queries from: "; |
2726 | for(vector<string>::const_iterator i = ips.begin(); i!= ips.end(); ++i) { | |
18af64a8 | 2727 | allowFrom->addMask(*i); |
f7c1d4e3 | 2728 | if(i!=ips.begin()) |
674cf0f6 | 2729 | L<<Logger::Warning<<", "; |
f7c1d4e3 BH |
2730 | L<<Logger::Warning<<*i; |
2731 | } | |
2732 | L<<Logger::Warning<<endl; | |
2733 | } | |
49a699c4 | 2734 | else { |
3ddb9247 | 2735 | if(::arg()["local-address"]!="127.0.0.1" && ::arg().asNum("local-port")==53) |
49a699c4 | 2736 | L<<Logger::Error<<"WARNING: Allowing queries from all IP addresses - this can be a security risk!"<<endl; |
f26bf547 | 2737 | allowFrom = nullptr; |
49a699c4 | 2738 | } |
3ddb9247 | 2739 | |
49a699c4 | 2740 | g_initialAllowFrom = allowFrom; |
d7dae798 | 2741 | broadcastFunction(boost::bind(pleaseSupplantACLs, allowFrom)); |
f26bf547 | 2742 | oldAllowFrom = nullptr; |
3ddb9247 | 2743 | |
49a699c4 | 2744 | l_initialized = true; |
18af64a8 BH |
2745 | } |
2746 | ||
795215f2 | 2747 | |
756e82cf | 2748 | static void setupDelegationOnly() |
2749 | { | |
2750 | vector<string> parts; | |
2751 | stringtok(parts, ::arg()["delegation-only"], ", \t"); | |
2752 | for(const auto& p : parts) { | |
9065eb05 | 2753 | SyncRes::addDelegationOnly(DNSName(p)); |
756e82cf | 2754 | } |
2755 | } | |
795215f2 | 2756 | |
8fd25133 RG |
2757 | static std::map<unsigned int, std::set<int> > parseCPUMap() |
2758 | { | |
2759 | std::map<unsigned int, std::set<int> > result; | |
2760 | ||
2761 | const std::string value = ::arg()["cpu-map"]; | |
2762 | ||
2763 | if (!value.empty() && !isSettingThreadCPUAffinitySupported()) { | |
2764 | L<<Logger::Warning<<"CPU mapping requested but not supported, skipping"<<endl; | |
2765 | return result; | |
2766 | } | |
2767 | ||
2768 | std::vector<std::string> parts; | |
2769 | ||
2770 | stringtok(parts, value, " \t"); | |
2771 | ||
2772 | for(const auto& part : parts) { | |
2773 | if (part.find('=') == string::npos) | |
2774 | continue; | |
2775 | ||
2776 | try { | |
2777 | auto headers = splitField(part, '='); | |
2778 | trim(headers.first); | |
2779 | trim(headers.second); | |
2780 | ||
2781 | unsigned int threadId = pdns_stou(headers.first); | |
2782 | std::vector<std::string> cpus; | |
2783 | ||
2784 | stringtok(cpus, headers.second, ","); | |
2785 | ||
2786 | for(const auto& cpu : cpus) { | |
2787 | int cpuId = std::stoi(cpu); | |
2788 | ||
2789 | result[threadId].insert(cpuId); | |
2790 | } | |
2791 | } | |
2792 | catch(const std::exception& e) { | |
2793 | L<<Logger::Error<<"Error parsing cpu-map entry '"<<part<<"': "<<e.what()<<endl; | |
2794 | } | |
2795 | } | |
2796 | ||
2797 | return result; | |
2798 | } | |
2799 | ||
2800 | static void setCPUMap(const std::map<unsigned int, std::set<int> >& cpusMap, unsigned int n, pthread_t tid) | |
2801 | { | |
2802 | const auto& cpuMapping = cpusMap.find(n); | |
2803 | if (cpuMapping != cpusMap.cend()) { | |
2804 | int rc = mapThreadToCPUList(tid, cpuMapping->second); | |
2805 | if (rc == 0) { | |
2806 | L<<Logger::Info<<"CPU affinity for worker "<<n<<" has been set to CPU map:"; | |
2807 | for (const auto cpu : cpuMapping->second) { | |
2808 | L<<Logger::Info<<" "<<cpu; | |
2809 | } | |
2810 | L<<Logger::Info<<endl; | |
2811 | } | |
2812 | else { | |
2813 | L<<Logger::Warning<<"Error setting CPU affinity for worker "<<n<<" to CPU map:"; | |
2814 | for (const auto cpu : cpuMapping->second) { | |
2815 | L<<Logger::Info<<" "<<cpu; | |
2816 | } | |
2817 | L<<Logger::Info<<strerror(rc)<<endl; | |
2818 | } | |
2819 | } | |
2820 | } | |
2821 | ||
d187038c | 2822 | static int serviceMain(int argc, char*argv[]) |
18af64a8 | 2823 | { |
5124de27 | 2824 | L.setName(s_programname); |
b6cfa948 | 2825 | L.disableSyslog(::arg().mustDo("disable-syslog")); |
b18fa400 | 2826 | L.setTimestamps(::arg().mustDo("log-timestamp")); |
18af64a8 BH |
2827 | |
2828 | if(!::arg()["logging-facility"].empty()) { | |
f8499e52 BH |
2829 | int val=logFacilityToLOG(::arg().asNum("logging-facility") ); |
2830 | if(val >= 0) | |
2831 | theL().setFacility(val); | |
18af64a8 BH |
2832 | else |
2833 | L<<Logger::Error<<"Unknown logging facility "<<::arg().asNum("logging-facility") <<endl; | |
2834 | } | |
2835 | ||
ba1a571d | 2836 | showProductVersion(); |
18af64a8 | 2837 | seedRandom(::arg()["entropy-source"]); |
3afde9b2 | 2838 | |
06ea9015 | 2839 | g_disthashseed=dns_random(0xffffffff); |
2840 | ||
b7ef5828 PL |
2841 | checkLinuxIPv6Limits(); |
2842 | try { | |
2843 | vector<string> addrs; | |
2844 | if(!::arg()["query-local-address6"].empty()) { | |
2845 | SyncRes::s_doIPv6=true; | |
2846 | L<<Logger::Warning<<"Enabling IPv6 transport for outgoing queries"<<endl; | |
2847 | ||
2848 | stringtok(addrs, ::arg()["query-local-address6"], ", ;"); | |
2849 | for(const string& addr : addrs) { | |
2850 | g_localQueryAddresses6.push_back(ComboAddress(addr)); | |
2851 | } | |
2852 | } | |
2853 | else { | |
2854 | L<<Logger::Warning<<"NOT using IPv6 for outgoing queries - set 'query-local-address6=::' to enable"<<endl; | |
2855 | } | |
2856 | addrs.clear(); | |
2857 | stringtok(addrs, ::arg()["query-local-address"], ", ;"); | |
2858 | for(const string& addr : addrs) { | |
2859 | g_localQueryAddresses4.push_back(ComboAddress(addr)); | |
2860 | } | |
2861 | } | |
2862 | catch(std::exception& e) { | |
2863 | L<<Logger::Error<<"Assigning local query addresses: "<<e.what(); | |
2864 | exit(99); | |
2865 | } | |
2866 | ||
e48c6b8a PL |
2867 | // keep this ABOVE loadRecursorLuaConfig! |
2868 | if(::arg()["dnssec"]=="off") | |
2869 | g_dnssecmode=DNSSECMode::Off; | |
2870 | else if(::arg()["dnssec"]=="process-no-validate") | |
2871 | g_dnssecmode=DNSSECMode::ProcessNoValidate; | |
2872 | else if(::arg()["dnssec"]=="process") | |
2873 | g_dnssecmode=DNSSECMode::Process; | |
2874 | else if(::arg()["dnssec"]=="validate") | |
2875 | g_dnssecmode=DNSSECMode::ValidateAll; | |
2876 | else if(::arg()["dnssec"]=="log-fail") | |
2877 | g_dnssecmode=DNSSECMode::ValidateForLog; | |
2878 | else { | |
2879 | L<<Logger::Error<<"Unknown DNSSEC mode "<<::arg()["dnssec"]<<endl; | |
2880 | exit(1); | |
2881 | } | |
2882 | ||
2883 | g_dnssecLogBogus = ::arg().mustDo("dnssec-log-bogus"); | |
d377bb54 | 2884 | g_maxNSEC3Iterations = ::arg().asNum("nsec3-max-iterations"); |
e48c6b8a | 2885 | |
a6f7f5fe | 2886 | g_maxCacheEntries = ::arg().asNum("max-cache-entries"); |
2887 | g_maxPacketCacheEntries = ::arg().asNum("max-packetcache-entries"); | |
2888 | ||
0f5785a6 PL |
2889 | try { |
2890 | loadRecursorLuaConfig(::arg()["lua-config-file"], ::arg().mustDo("daemon")); | |
2891 | } | |
2892 | catch (PDNSException &e) { | |
2893 | L<<Logger::Error<<"Cannot load Lua configuration: "<<e.reason<<endl; | |
2894 | exit(1); | |
2895 | } | |
ad42489c | 2896 | |
18af64a8 | 2897 | parseACLs(); |
92011b8f | 2898 | sortPublicSuffixList(); |
2899 | ||
eb5bae86 | 2900 | if(!::arg()["dont-query"].empty()) { |
eb5bae86 BH |
2901 | vector<string> ips; |
2902 | stringtok(ips, ::arg()["dont-query"], ", "); | |
66e0b6ea BH |
2903 | ips.push_back("0.0.0.0"); |
2904 | ips.push_back("::"); | |
c36bc97a | 2905 | |
eb5bae86 BH |
2906 | L<<Logger::Warning<<"Will not send queries to: "; |
2907 | for(vector<string>::const_iterator i = ips.begin(); i!= ips.end(); ++i) { | |
9065eb05 | 2908 | SyncRes::addDontQuery(*i); |
eb5bae86 | 2909 | if(i!=ips.begin()) |
4957a608 | 2910 | L<<Logger::Warning<<", "; |
eb5bae86 BH |
2911 | L<<Logger::Warning<<*i; |
2912 | } | |
2913 | L<<Logger::Warning<<endl; | |
2914 | } | |
2915 | ||
f7c1d4e3 | 2916 | g_quiet=::arg().mustDo("quiet"); |
3ddb9247 | 2917 | |
1bc3c142 BH |
2918 | g_weDistributeQueries = ::arg().mustDo("pdns-distributes-queries"); |
2919 | if(g_weDistributeQueries) { | |
2920 | L<<Logger::Warning<<"PowerDNS Recursor itself will distribute queries over threads"<<endl; | |
2921 | } | |
3ddb9247 | 2922 | |
756e82cf | 2923 | setupDelegationOnly(); |
b33c2462 | 2924 | g_outgoingEDNSBufsize=::arg().asNum("edns-outgoing-bufsize"); |
756e82cf | 2925 | |
77499b05 BH |
2926 | if(::arg()["trace"]=="fail") { |
2927 | SyncRes::setDefaultLogMode(SyncRes::Store); | |
2928 | } | |
2929 | else if(::arg().mustDo("trace")) { | |
2930 | SyncRes::setDefaultLogMode(SyncRes::Log); | |
f7c1d4e3 BH |
2931 | ::arg().set("quiet")="no"; |
2932 | g_quiet=false; | |
3e9c6c0a | 2933 | g_dnssecLOG=true; |
f7c1d4e3 | 2934 | } |
3ddb9247 | 2935 | |
aadceba8 | 2936 | SyncRes::s_minimumTTL = ::arg().asNum("minimum-ttl-override"); |
2937 | ||
1051f8a9 BH |
2938 | SyncRes::s_nopacketcache = ::arg().mustDo("disable-packetcache"); |
2939 | ||
f7c1d4e3 | 2940 | SyncRes::s_maxnegttl=::arg().asNum("max-negative-ttl"); |
63637fd8 | 2941 | SyncRes::s_maxcachettl=max(::arg().asNum("max-cache-ttl"), 15); |
1051f8a9 | 2942 | SyncRes::s_packetcachettl=::arg().asNum("packetcache-ttl"); |
79ec0627 PL |
2943 | // Cap the packetcache-servfail-ttl to the packetcache-ttl |
2944 | uint32_t packetCacheServFailTTL = ::arg().asNum("packetcache-servfail-ttl"); | |
2945 | SyncRes::s_packetcacheservfailttl=(packetCacheServFailTTL > SyncRes::s_packetcachettl) ? SyncRes::s_packetcachettl : packetCacheServFailTTL; | |
628e2c7b PA |
2946 | SyncRes::s_serverdownmaxfails=::arg().asNum("server-down-max-fails"); |
2947 | SyncRes::s_serverdownthrottletime=::arg().asNum("server-down-throttle-time"); | |
f7c1d4e3 | 2948 | SyncRes::s_serverID=::arg()["server-id"]; |
173d790e | 2949 | SyncRes::s_maxqperq=::arg().asNum("max-qperq"); |
9de3e034 | 2950 | SyncRes::s_maxtotusec=1000*::arg().asNum("max-total-msec"); |
7c3398aa | 2951 | SyncRes::s_maxdepth=::arg().asNum("max-recursion-depth"); |
01402d56 | 2952 | SyncRes::s_rootNXTrust = ::arg().mustDo( "root-nx-trust"); |
f7c1d4e3 BH |
2953 | if(SyncRes::s_serverID.empty()) { |
2954 | char tmp[128]; | |
2955 | gethostname(tmp, sizeof(tmp)-1); | |
2956 | SyncRes::s_serverID=tmp; | |
2957 | } | |
3ddb9247 | 2958 | |
e9f9b8ec RG |
2959 | SyncRes::s_ecsipv4limit = ::arg().asNum("ecs-ipv4-bits"); |
2960 | SyncRes::s_ecsipv6limit = ::arg().asNum("ecs-ipv6-bits"); | |
2961 | ||
8a3a3822 RG |
2962 | if (!::arg().isEmpty("ecs-scope-zero-address")) { |
2963 | ComboAddress scopeZero(::arg()["ecs-scope-zero-address"]); | |
2964 | SyncRes::setECSScopeZeroAddress(Netmask(scopeZero, scopeZero.isIPv4() ? 32 : 128)); | |
2965 | } | |
2966 | else { | |
2967 | bool found = false; | |
2968 | for (const auto& addr : g_localQueryAddresses4) { | |
2969 | if (!IsAnyAddress(addr)) { | |
2970 | SyncRes::setECSScopeZeroAddress(Netmask(addr, 32)); | |
2971 | found = true; | |
2972 | break; | |
2973 | } | |
2974 | } | |
2975 | if (!found) { | |
2976 | for (const auto& addr : g_localQueryAddresses6) { | |
2977 | if (!IsAnyAddress(addr)) { | |
2978 | SyncRes::setECSScopeZeroAddress(Netmask(addr, 128)); | |
2979 | found = true; | |
2980 | break; | |
2981 | } | |
2982 | } | |
2983 | if (!found) { | |
2984 | SyncRes::setECSScopeZeroAddress(Netmask("127.0.0.1/32")); | |
2985 | } | |
2986 | } | |
2987 | } | |
2988 | ||
2fe3354d CH |
2989 | SyncRes::parseEDNSSubnetWhitelist(::arg()["edns-subnet-whitelist"]); |
2990 | SyncRes::parseEDNSSubnetAddFor(::arg()["ecs-add-for"]); | |
2991 | g_useIncomingECS = ::arg().mustDo("use-incoming-edns-subnet"); | |
2992 | ||
5b0ddd18 | 2993 | g_networkTimeoutMsec = ::arg().asNum("network-timeout"); |
bb4bdbaf | 2994 | |
49a699c4 | 2995 | g_initialDomainMap = parseAuthAndForwards(); |
3ddb9247 | 2996 | |
08f3f638 | 2997 | g_latencyStatSize=::arg().asNum("latency-statistic-size"); |
3ddb9247 | 2998 | |
f7c1d4e3 | 2999 | g_logCommonErrors=::arg().mustDo("log-common-errors"); |
98d36505 | 3000 | g_logRPZChanges = ::arg().mustDo("log-rpz-changes"); |
e661a20b PD |
3001 | |
3002 | g_anyToTcp = ::arg().mustDo("any-to-tcp"); | |
a09a8ce0 PD |
3003 | g_udpTruncationThreshold = ::arg().asNum("udp-truncation-threshold"); |
3004 | ||
b3adda56 PD |
3005 | g_lowercaseOutgoing = ::arg().mustDo("lowercase-outgoing"); |
3006 | ||
810ff705 | 3007 | g_numWorkerThreads = ::arg().asNum("threads"); |
1c4f2e1b RG |
3008 | if (g_numWorkerThreads < 1) { |
3009 | L<<Logger::Warning<<"Asked to run with 0 threads, raising to 1 instead"<<endl; | |
3010 | g_numWorkerThreads = 1; | |
3011 | } | |
3012 | ||
810ff705 RG |
3013 | g_numThreads = g_numWorkerThreads + g_weDistributeQueries; |
3014 | g_maxMThreads = ::arg().asNum("max-mthreads"); | |
3015 | ||
00b8cadc RG |
3016 | g_gettagNeedsEDNSOptions = ::arg().mustDo("gettag-needs-edns-options"); |
3017 | ||
0ec489bf | 3018 | g_statisticsInterval = ::arg().asNum("statistics-interval"); |
3019 | ||
810ff705 RG |
3020 | #ifdef SO_REUSEPORT |
3021 | g_reusePort = ::arg().mustDo("reuseport"); | |
3022 | #endif | |
3023 | ||
3024 | g_useOneSocketPerThread = (!g_weDistributeQueries && g_reusePort); | |
3025 | ||
3026 | if (g_useOneSocketPerThread) { | |
3027 | for (unsigned int threadId = 0; threadId < g_numWorkerThreads; threadId++) { | |
3028 | makeUDPServerSockets(threadId); | |
3029 | makeTCPServerSockets(threadId); | |
3030 | } | |
3031 | } | |
3032 | else { | |
3033 | makeUDPServerSockets(0); | |
3034 | makeTCPServerSockets(0); | |
3035 | } | |
815099b2 | 3036 | |
677e2a46 BH |
3037 | int forks; |
3038 | for(forks = 0; forks < ::arg().asNum("processes") - 1; ++forks) { | |
1bc3c142 BH |
3039 | if(!fork()) // we are child |
3040 | break; | |
3041 | } | |
3ddb9247 | 3042 | |
f7c1d4e3 BH |
3043 | if(::arg().mustDo("daemon")) { |
3044 | L<<Logger::Warning<<"Calling daemonize, going to background"<<endl; | |
3045 | L.toConsole(Logger::Critical); | |
f7c1d4e3 | 3046 | daemonize(); |
a4241908 | 3047 | loadRecursorLuaConfig(::arg()["lua-config-file"], false); |
f7c1d4e3 BH |
3048 | } |
3049 | signal(SIGUSR1,usr1Handler); | |
3050 | signal(SIGUSR2,usr2Handler); | |
3051 | signal(SIGPIPE,SIG_IGN); | |
810ff705 | 3052 | |
a6414fdc | 3053 | checkOrFixFDS(); |
3ddb9247 | 3054 | |
d1b28475 KM |
3055 | #ifdef HAVE_LIBSODIUM |
3056 | if (sodium_init() == -1) { | |
3057 | L<<Logger::Error<<"Unable to initialize sodium crypto library"<<endl; | |
3058 | exit(99); | |
3059 | } | |
3060 | #endif | |
3061 | ||
3afde9b2 PL |
3062 | openssl_thread_setup(); |
3063 | openssl_seed(); | |
3064 | ||
138435cb BH |
3065 | int newgid=0; |
3066 | if(!::arg()["setgid"].empty()) | |
3067 | newgid=Utility::makeGidNumeric(::arg()["setgid"]); | |
3068 | int newuid=0; | |
3069 | if(!::arg()["setuid"].empty()) | |
3070 | newuid=Utility::makeUidNumeric(::arg()["setuid"]); | |
3071 | ||
f1d6a7ce KM |
3072 | Utility::dropGroupPrivs(newuid, newgid); |
3073 | ||
138435cb | 3074 | if (!::arg()["chroot"].empty()) { |
75336810 PL |
3075 | #ifdef HAVE_SYSTEMD |
3076 | char *ns; | |
3077 | ns = getenv("NOTIFY_SOCKET"); | |
3078 | if (ns != nullptr) { | |
3079 | L<<Logger::Error<<"Unable to chroot when running from systemd. Please disable chroot= or set the 'Type' for this service to 'simple'"<<endl; | |
3080 | exit(1); | |
3081 | } | |
3082 | #endif | |
138435cb BH |
3083 | if (chroot(::arg()["chroot"].c_str())<0 || chdir("/") < 0) { |
3084 | L<<Logger::Error<<"Unable to chroot to '"+::arg()["chroot"]+"': "<<strerror (errno)<<", exiting"<<endl; | |
3085 | exit(1); | |
3086 | } | |
f0f3f0b0 PL |
3087 | else |
3088 | L<<Logger::Error<<"Chrooted to '"<<::arg()["chroot"]<<"'"<<endl; | |
138435cb BH |
3089 | } |
3090 | ||
f0f3f0b0 PL |
3091 | s_pidfname=::arg()["socket-dir"]+"/"+s_programname+".pid"; |
3092 | if(!s_pidfname.empty()) | |
3093 | unlink(s_pidfname.c_str()); // remove possible old pid file | |
3094 | writePid(); | |
3095 | ||
3096 | makeControlChannelSocket( ::arg().asNum("processes") > 1 ? forks : -1); | |
3097 | ||
f1d6a7ce | 3098 | Utility::dropUserPrivs(newuid); |
c0063e60 | 3099 | |
49a699c4 | 3100 | makeThreadPipes(); |
3ddb9247 | 3101 | |
5d4dd7fe BH |
3102 | g_tcpTimeout=::arg().asNum("client-tcp-timeout"); |
3103 | g_maxTCPPerClient=::arg().asNum("max-tcp-per-client"); | |
fde296a3 | 3104 | g_tcpMaxQueriesPerConn=::arg().asNum("max-tcp-queries-per-connection"); |
343257a4 | 3105 | |
d705aad9 RG |
3106 | if (::arg().mustDo("snmp-agent")) { |
3107 | g_snmpAgent = std::make_shared<RecursorSNMPAgent>("recursor", ::arg()["snmp-master-socket"]); | |
3108 | g_snmpAgent->run(); | |
3109 | } | |
3110 | ||
8fd25133 | 3111 | const auto cpusMap = parseCPUMap(); |
c3828c03 | 3112 | if(g_numThreads == 1) { |
76698c6e | 3113 | L<<Logger::Warning<<"Operating unthreaded"<<endl; |
6b6720de PL |
3114 | #ifdef HAVE_SYSTEMD |
3115 | sd_notify(0, "READY=1"); | |
3116 | #endif | |
8fd25133 | 3117 | setCPUMap(cpusMap, 0, pthread_self()); |
76698c6e BH |
3118 | recursorThread(0); |
3119 | } | |
3120 | else { | |
3121 | pthread_t tid; | |
c3828c03 BH |
3122 | L<<Logger::Warning<<"Launching "<< g_numThreads <<" threads"<<endl; |
3123 | for(unsigned int n=0; n < g_numThreads; ++n) { | |
77499b05 | 3124 | pthread_create(&tid, 0, recursorThread, (void*)(long)n); |
8fd25133 RG |
3125 | |
3126 | setCPUMap(cpusMap, n, tid); | |
76698c6e BH |
3127 | } |
3128 | void* res; | |
6b6720de PL |
3129 | #ifdef HAVE_SYSTEMD |
3130 | sd_notify(0, "READY=1"); | |
3131 | #endif | |
76698c6e | 3132 | pthread_join(tid, &res); |
bb4bdbaf | 3133 | } |
bb4bdbaf BH |
3134 | return 0; |
3135 | } | |
3136 | ||
d187038c | 3137 | static void* recursorThread(void* ptr) |
bb4bdbaf BH |
3138 | try |
3139 | { | |
2e2cd8ec | 3140 | t_id=(int) (long) ptr; |
49a699c4 | 3141 | SyncRes tmp(g_now); // make sure it allocates tsstorage before we do anything, like primeHints or so.. |
a712cb56 | 3142 | SyncRes::setDomainMap(g_initialDomainMap); |
49a699c4 | 3143 | t_allowFrom = g_initialAllowFrom; |
f26bf547 RG |
3144 | t_udpclientsocks = std::unique_ptr<UDPClientSocks>(new UDPClientSocks()); |
3145 | t_tcpClientCounts = std::unique_ptr<tcpClientCounts_t>(new tcpClientCounts_t()); | |
49a699c4 | 3146 | primeHints(); |
3ddb9247 | 3147 | |
f26bf547 | 3148 | t_packetCache = std::unique_ptr<RecursorPacketCache>(new RecursorPacketCache()); |
3ddb9247 | 3149 | |
aa7929a3 | 3150 | #ifdef HAVE_PROTOBUF |
f26bf547 | 3151 | t_uuidGenerator = std::unique_ptr<boost::uuids::random_generator>(new boost::uuids::random_generator()); |
aa7929a3 | 3152 | #endif |
49a699c4 | 3153 | L<<Logger::Warning<<"Done priming cache with root hints"<<endl; |
3ddb9247 | 3154 | |
674cf0f6 BH |
3155 | try { |
3156 | if(!::arg()["lua-dns-script"].empty()) { | |
9694e14f AT |
3157 | t_pdl = std::make_shared<RecursorLua4>(); |
3158 | t_pdl->loadFile(::arg()["lua-dns-script"]); | |
674cf0f6 BH |
3159 | L<<Logger::Warning<<"Loaded 'lua' script from '"<<::arg()["lua-dns-script"]<<"'"<<endl; |
3160 | } | |
674cf0f6 BH |
3161 | } |
3162 | catch(std::exception &e) { | |
3163 | L<<Logger::Error<<"Failed to load 'lua' script from '"<<::arg()["lua-dns-script"]<<"': "<<e.what()<<endl; | |
62f0ae62 | 3164 | _exit(99); |
674cf0f6 | 3165 | } |
3ddb9247 | 3166 | |
f8f243b0 | 3167 | unsigned int ringsize=::arg().asNum("stats-ringbuffer-entries") / g_numWorkerThreads; |
92011b8f | 3168 | if(ringsize) { |
f26bf547 | 3169 | t_remotes = std::unique_ptr<addrringbuf_t>(new addrringbuf_t()); |
f8f243b0 | 3170 | if(g_weDistributeQueries) // if so, only 1 thread does recvfrom |
3ddb9247 | 3171 | t_remotes->set_capacity(::arg().asNum("stats-ringbuffer-entries")); |
f8f243b0 | 3172 | else |
3ddb9247 | 3173 | t_remotes->set_capacity(ringsize); |
f26bf547 | 3174 | t_servfailremotes = std::unique_ptr<addrringbuf_t>(new addrringbuf_t()); |
3ddb9247 | 3175 | t_servfailremotes->set_capacity(ringsize); |
f26bf547 | 3176 | t_largeanswerremotes = std::unique_ptr<addrringbuf_t>(new addrringbuf_t()); |
3ddb9247 | 3177 | t_largeanswerremotes->set_capacity(ringsize); |
92011b8f | 3178 | |
f26bf547 | 3179 | t_queryring = std::unique_ptr<boost::circular_buffer<pair<DNSName, uint16_t> > >(new boost::circular_buffer<pair<DNSName, uint16_t> >()); |
3ddb9247 | 3180 | t_queryring->set_capacity(ringsize); |
f26bf547 | 3181 | t_servfailqueryring = std::unique_ptr<boost::circular_buffer<pair<DNSName, uint16_t> > >(new boost::circular_buffer<pair<DNSName, uint16_t> >()); |
3ddb9247 | 3182 | t_servfailqueryring->set_capacity(ringsize); |
92011b8f | 3183 | } |
3ddb9247 | 3184 | |
f26bf547 | 3185 | MT=std::unique_ptr<MTasker<PacketID,string> >(new MTasker<PacketID,string>(::arg().asNum("stack-size"))); |
3ddb9247 | 3186 | |
bb4bdbaf BH |
3187 | PacketID pident; |
3188 | ||
3189 | t_fdm=getMultiplexer(); | |
f3d1d67b | 3190 | if(!t_id) { |
d07bf7ff | 3191 | if(::arg().mustDo("webserver")) { |
30a1aa92 | 3192 | L<<Logger::Warning << "Enabling web server" << endl; |
8989097d | 3193 | try { |
1ce57618 | 3194 | new RecursorWebServer(t_fdm); |
8989097d CH |
3195 | } |
3196 | catch(PDNSException &e) { | |
3197 | L<<Logger::Error<<"Exception: "<<e.reason<<endl; | |
3198 | exit(99); | |
3199 | } | |
f3d1d67b | 3200 | } |
83252304 | 3201 | L<<Logger::Error<<"Enabled '"<< t_fdm->getName() << "' multiplexer"<<endl; |
f3d1d67b | 3202 | } |
83252304 | 3203 | |
49a699c4 | 3204 | t_fdm->addReadFD(g_pipes[t_id].readToThread, handlePipeRequest); |
83252304 | 3205 | |
810ff705 | 3206 | if(g_useOneSocketPerThread) { |
2573d4a6 RG |
3207 | for(deferredAdd_t::const_iterator i = deferredAdds[t_id].cbegin(); i != deferredAdds[t_id].cend(); ++i) { |
3208 | t_fdm->addReadFD(i->first, i->second); | |
810ff705 RG |
3209 | } |
3210 | } | |
3211 | else { | |
3212 | if(!g_weDistributeQueries || !t_id) { // if we distribute queries, only t_id = 0 listens | |
0670917b | 3213 | for(deferredAdd_t::const_iterator i = deferredAdds[0].cbegin(); i != deferredAdds[0].cend(); ++i) { |
810ff705 RG |
3214 | t_fdm->addReadFD(i->first, i->second); |
3215 | } | |
3216 | } | |
3217 | } | |
3ddb9247 | 3218 | |
b0b37121 | 3219 | registerAllStats(); |
674cf0f6 | 3220 | if(!t_id) { |
674cf0f6 BH |
3221 | t_fdm->addReadFD(s_rcc.d_fd, handleRCC); // control channel |
3222 | } | |
1bc3c142 | 3223 | |
f7c1d4e3 | 3224 | unsigned int maxTcpClients=::arg().asNum("max-tcp-clients"); |
3ddb9247 | 3225 | |
f7c1d4e3 | 3226 | bool listenOnTCP(true); |
49a699c4 | 3227 | |
2c78bd57 | 3228 | time_t last_carbon=0; |
3229 | time_t carbonInterval=::arg().asNum("carbon-interval"); | |
ac0995bb | 3230 | counter.store(0); // used to periodically execute certain tasks |
f7c1d4e3 | 3231 | for(;;) { |
ac0e821b | 3232 | while(MT->schedule(&g_now)); // MTasker letting the mthreads do their thing |
3ddb9247 | 3233 | |
3427fa8a BH |
3234 | if(!(counter%500)) { |
3235 | MT->makeThread(houseKeeping, 0); | |
f7c1d4e3 BH |
3236 | } |
3237 | ||
d2392145 | 3238 | if(!(counter%55)) { |
d8f6d49f | 3239 | typedef vector<pair<int, FDMultiplexer::funcparam_t> > expired_t; |
bb4bdbaf | 3240 | expired_t expired=t_fdm->getTimeouts(g_now); |
3ddb9247 | 3241 | |
f7c1d4e3 | 3242 | for(expired_t::iterator i=expired.begin() ; i != expired.end(); ++i) { |
cd989c87 | 3243 | shared_ptr<TCPConnection> conn=any_cast<shared_ptr<TCPConnection> >(i->second); |
4957a608 | 3244 | if(g_logCommonErrors) |
cd989c87 | 3245 | L<<Logger::Warning<<"Timeout from remote TCP client "<< conn->d_remote.toString() <<endl; |
4957a608 | 3246 | t_fdm->removeReadFD(i->first); |
f7c1d4e3 BH |
3247 | } |
3248 | } | |
3ddb9247 | 3249 | |
f7c1d4e3 BH |
3250 | counter++; |
3251 | ||
3427fa8a | 3252 | if(!t_id && statsWanted) { |
f7c1d4e3 BH |
3253 | doStats(); |
3254 | } | |
3255 | ||
3256 | Utility::gettimeofday(&g_now, 0); | |
2c78bd57 | 3257 | |
3258 | if(!t_id && (g_now.tv_sec - last_carbon >= carbonInterval)) { | |
3259 | MT->makeThread(doCarbonDump, 0); | |
3260 | last_carbon = g_now.tv_sec; | |
3261 | } | |
3262 | ||
bb4bdbaf | 3263 | t_fdm->run(&g_now); |
3ea54bf0 | 3264 | // 'run' updates g_now for us |
f7c1d4e3 | 3265 | |
b8ef5c5c | 3266 | if(!g_weDistributeQueries || !t_id) { // if pdns distributes queries, only tid 0 should do this |
5c889cf5 | 3267 | if(listenOnTCP) { |
3268 | if(TCPConnection::getCurrentConnections() > maxTcpClients) { // shutdown, too many connections | |
3269 | for(tcpListenSockets_t::iterator i=g_tcpListenSockets.begin(); i != g_tcpListenSockets.end(); ++i) | |
3270 | t_fdm->removeReadFD(*i); | |
3271 | listenOnTCP=false; | |
3272 | } | |
f7c1d4e3 | 3273 | } |
5c889cf5 | 3274 | else { |
3275 | if(TCPConnection::getCurrentConnections() <= maxTcpClients) { // reenable | |
3276 | for(tcpListenSockets_t::iterator i=g_tcpListenSockets.begin(); i != g_tcpListenSockets.end(); ++i) | |
3277 | t_fdm->addReadFD(*i, handleNewTCPQuestion); | |
3278 | listenOnTCP=true; | |
3279 | } | |
f7c1d4e3 BH |
3280 | } |
3281 | } | |
3282 | } | |
3283 | } | |
3f81d239 | 3284 | catch(PDNSException &ae) { |
bb4bdbaf BH |
3285 | L<<Logger::Error<<"Exception: "<<ae.reason<<endl; |
3286 | return 0; | |
3287 | } | |
3288 | catch(std::exception &e) { | |
3289 | L<<Logger::Error<<"STL Exception: "<<e.what()<<endl; | |
3290 | return 0; | |
3291 | } | |
3292 | catch(...) { | |
3293 | L<<Logger::Error<<"any other exception in main: "<<endl; | |
3294 | return 0; | |
3295 | } | |
3296 | ||
51e2144e | 3297 | |
3ddb9247 | 3298 | int main(int argc, char **argv) |
288f4aa9 | 3299 | { |
dbd23fc2 BH |
3300 | g_argc = argc; |
3301 | g_argv = argv; | |
5e3de507 | 3302 | g_stats.startupTime=time(0); |
3e135495 | 3303 | versionSetProduct(ProductRecursor); |
8a63d3ce | 3304 | reportBasicTypes(); |
0007c2e5 | 3305 | reportOtherTypes(); |
ea634573 | 3306 | |
22030c37 | 3307 | int ret = EXIT_SUCCESS; |
caa6eefa | 3308 | |
288f4aa9 | 3309 | try { |
f888311c | 3310 | ::arg().set("stack-size","stack size per mthread")="200000"; |
2e3d8a19 | 3311 | ::arg().set("soa-minimum-ttl","Don't change")="0"; |
2e3d8a19 | 3312 | ::arg().set("no-shuffle","Don't change")="off"; |
2e3d8a19 | 3313 | ::arg().set("local-port","port to listen on")="53"; |
32252594 | 3314 | ::arg().set("local-address","IP addresses to listen on, separated by spaces or commas. Also accepts ports.")="127.0.0.1"; |
fec7dd5a | 3315 | ::arg().setSwitch("non-local-bind", "Enable binding to non-local addresses by using FREEBIND / BINDANY socket options")="no"; |
77499b05 | 3316 | ::arg().set("trace","if we should output heaps of logging. set to 'fail' to only log failing domains")="off"; |
a6415142 | 3317 | ::arg().set("dnssec", "DNSSEC mode: off/process-no-validate (default)/process/log-fail/validate")="process-no-validate"; |
c87e1876 | 3318 | ::arg().set("dnssec-log-bogus", "Log DNSSEC bogus validations")="no"; |
d3f809bf | 3319 | ::arg().set("daemon","Operate as a daemon")="no"; |
191f2e47 | 3320 | ::arg().setSwitch("write-pid","Write a PID file")="yes"; |
9afa8662 | 3321 | ::arg().set("loglevel","Amount of logging. Higher is more. Do not set below 3")="6"; |
b6cfa948 | 3322 | ::arg().set("disable-syslog","Disable logging to syslog, useful when running inside a supervisor that logs stdout")="no"; |
b18fa400 | 3323 | ::arg().set("log-timestamp","Print timestamps in log lines, useful to disable when running with a tool that timestamps stdout already")="yes"; |
22e0810c | 3324 | ::arg().set("log-common-errors","If we should log rather common errors")="no"; |
2e3d8a19 BH |
3325 | ::arg().set("chroot","switch to chroot jail")=""; |
3326 | ::arg().set("setgid","If set, change group id to this gid for more security")=""; | |
3327 | ::arg().set("setuid","If set, change user id to this uid for more security")=""; | |
c83ee49d | 3328 | ::arg().set("network-timeout", "Wait this number of milliseconds for network i/o")="1500"; |
bb4bdbaf | 3329 | ::arg().set("threads", "Launch this number of threads")="2"; |
adabfcb9 | 3330 | ::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 | 3331 | ::arg().set("config-name","Name of this virtual configuration - will rename the binary image")=""; |
d07bf7ff | 3332 | ::arg().set("api-config-dir", "Directory where REST API stores config and zones") = ""; |
479e0976 CH |
3333 | ::arg().set("api-key", "Static pre-shared authentication key for access to the REST API") = ""; |
3334 | ::arg().set("api-logfile", "Location of the server logfile (used by the REST API)") = "/var/log/pdns.log"; | |
3335 | ::arg().set("api-readonly", "Disallow data modification through the REST API when set") = "no"; | |
3336 | ::arg().setSwitch("webserver", "Start a webserver (for REST API)") = "no"; | |
d07bf7ff PL |
3337 | ::arg().set("webserver-address", "IP Address of webserver to listen on") = "127.0.0.1"; |
3338 | ::arg().set("webserver-port", "Port of webserver to listen on") = "8082"; | |
3339 | ::arg().set("webserver-password", "Password required for accessing the webserver") = ""; | |
be3e1477 | 3340 | ::arg().set("webserver-allow-from","Webserver access is only allowed from these subnets")="127.0.0.1,::1"; |
cc08b5a9 | 3341 | ::arg().set("carbon-ourname", "If set, overrides our reported hostname for carbon stats")=""; |
e12f8407 | 3342 | ::arg().set("carbon-server", "If set, send metrics in carbon (graphite) format to this server IP address")=""; |
2c78bd57 | 3343 | ::arg().set("carbon-interval", "Number of seconds between carbon (graphite) updates")="30"; |
0ec489bf | 3344 | ::arg().set("statistics-interval", "Number of seconds between printing of recursor statistics, 0 to disable")="1800"; |
c038218b | 3345 | ::arg().set("quiet","Suppress logging of questions and answers")=""; |
f27e6356 | 3346 | ::arg().set("logging-facility","Facility to log messages as. 0 corresponds to local0")=""; |
2e3d8a19 | 3347 | ::arg().set("config-dir","Location of configuration directory (recursor.conf)")=SYSCONFDIR; |
fdbf35ac BH |
3348 | ::arg().set("socket-owner","Owner of socket")=""; |
3349 | ::arg().set("socket-group","Group of socket")=""; | |
3350 | ::arg().set("socket-mode", "Permissions for socket")=""; | |
3ddb9247 | 3351 | |
f0f3f0b0 | 3352 | ::arg().set("socket-dir",string("Where the controlsocket will live, ")+LOCALSTATEDIR+" when unset and not chrooted" )=""; |
2e3d8a19 BH |
3353 | ::arg().set("delegation-only","Which domains we only accept delegations from")=""; |
3354 | ::arg().set("query-local-address","Source IP address for sending queries")="0.0.0.0"; | |
d4fb76e9 | 3355 | ::arg().set("query-local-address6","Source IPv6 address for sending queries. IF UNSET, IPv6 WILL NOT BE USED FOR OUTGOING QUERIES")=""; |
2e3d8a19 | 3356 | ::arg().set("client-tcp-timeout","Timeout in seconds when talking to TCP clients")="2"; |
85c32340 | 3357 | ::arg().set("max-mthreads", "Maximum number of simultaneous Mtasker threads")="2048"; |
2e3d8a19 | 3358 | ::arg().set("max-tcp-clients","Maximum number of simultaneous TCP clients")="128"; |
324dc148 | 3359 | ::arg().set("server-down-max-fails","Maximum number of consecutive timeouts (and unreachables) to mark a server as down ( 0 => disabled )")="64"; |
979edd70 | 3360 | ::arg().set("server-down-throttle-time","Number of seconds to throttle all queries to a server after being marked as down")="60"; |
2e3d8a19 | 3361 | ::arg().set("hint-file", "If set, load root hints from this file")=""; |
b45eb27c | 3362 | ::arg().set("max-cache-entries", "If set, maximum number of entries in the main cache")="1000000"; |
a9af3782 | 3363 | ::arg().set("max-negative-ttl", "maximum number of seconds to keep a negative cached entry in memory")="3600"; |
c3e753c7 | 3364 | ::arg().set("max-cache-ttl", "maximum number of seconds to keep a cached entry in memory")="86400"; |
1051f8a9 | 3365 | ::arg().set("packetcache-ttl", "maximum number of seconds to keep a cached entry in packetcache")="3600"; |
927c12b0 | 3366 | ::arg().set("max-packetcache-entries", "maximum number of entries to keep in the packetcache")="500000"; |
1051f8a9 | 3367 | ::arg().set("packetcache-servfail-ttl", "maximum number of seconds to keep a cached servfail entry in packetcache")="60"; |
54c4c0d8 | 3368 | ::arg().set("server-id", "Returned when queried for 'id.server' TXT or NSID, defaults to hostname")=""; |
92011b8f | 3369 | ::arg().set("stats-ringbuffer-entries", "maximum number of packets to store statistics for")="10000"; |
ba1a571d | 3370 | ::arg().set("version-string", "string reported on version.pdns or version.bind")=fullVersionString(); |
49a699c4 | 3371 | ::arg().set("allow-from", "If set, only allow these comma separated netmasks to recurse")=LOCAL_NETS; |
2c95fc65 | 3372 | ::arg().set("allow-from-file", "If set, load allowed netmasks from this file")=""; |
51e2144e | 3373 | ::arg().set("entropy-source", "If set, read entropy from this file")="/dev/urandom"; |
3ddb9247 | 3374 | ::arg().set("dont-query", "If set, do not query these netmasks for DNS data")=DONT_QUERY; |
4e120339 | 3375 | ::arg().set("max-tcp-per-client", "If set, maximum number of TCP sessions per client (IP address)")="0"; |
fde296a3 | 3376 | ::arg().set("max-tcp-queries-per-connection", "If set, maximum number of TCP queries in a TCP connection")="0"; |
0d5f0a9f | 3377 | ::arg().set("spoof-nearmiss-max", "If non-zero, assume spoofing after this many near misses")="20"; |
4ef015cd | 3378 | ::arg().set("single-socket", "If set, only use a single socket for outgoing queries")="off"; |
5605c067 | 3379 | ::arg().set("auth-zones", "Zones for which we have authoritative data, comma separated domain=file pairs ")=""; |
3e61e7f7 | 3380 | ::arg().set("lua-config-file", "More powerful configuration options")=""; |
644dd1da | 3381 | |
5605c067 | 3382 | ::arg().set("forward-zones", "Zones for which we forward queries, comma separated domain=ip pairs")=""; |
927c12b0 BH |
3383 | ::arg().set("forward-zones-recurse", "Zones for which we forward queries with recursion bit, comma separated domain=ip pairs")=""; |
3384 | ::arg().set("forward-zones-file", "File with (+)domain=ip pairs for forwarding")=""; | |
5605c067 | 3385 | ::arg().set("export-etc-hosts", "If we should serve up contents from /etc/hosts")="off"; |
ac0b4eb3 | 3386 | ::arg().set("export-etc-hosts-search-suffix", "Also serve up the contents of /etc/hosts with this suffix")=""; |
3ea54bf0 | 3387 | ::arg().set("etc-hosts-file", "Path to 'hosts' file")="/etc/hosts"; |
e498dac1 | 3388 | ::arg().set("serve-rfc1918", "If we should be authoritative for RFC 1918 private IP space")="yes"; |
4485aa35 | 3389 | ::arg().set("lua-dns-script", "Filename containing an optional 'lua' script that will be used to modify dns answers")=""; |
08f3f638 | 3390 | ::arg().set("latency-statistic-size","Number of latency values to calculate the qa-latency average")="10000"; |
3ddb9247 | 3391 | ::arg().setSwitch( "disable-packetcache", "Disable packetcache" )= "no"; |
35695d18 | 3392 | ::arg().set("ecs-ipv4-bits", "Number of bits of IPv4 address to pass for EDNS Client Subnet")="24"; |
3393 | ::arg().set("ecs-ipv6-bits", "Number of bits of IPv6 address to pass for EDNS Client Subnet")="56"; | |
3f975863 | 3394 | ::arg().set("edns-subnet-whitelist", "List of netmasks and domains that we should enable EDNS subnet for")=""; |
2fe3354d | 3395 | ::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 | 3396 | ::arg().set("ecs-scope-zero-address", "Address to send to whitelisted authoritative servers for incoming queries with ECS prefix-length source of 0")=""; |
a16c4536 | 3397 | ::arg().setSwitch( "use-incoming-edns-subnet", "Pass along received EDNS Client Subnet information")="no"; |
e498dac1 | 3398 | ::arg().setSwitch( "pdns-distributes-queries", "If PowerDNS itself should distribute queries over threads")="yes"; |
4ca2d205 | 3399 | ::arg().setSwitch( "root-nx-trust", "If set, believe that an NXDOMAIN from the root means the TLD does not exist")="yes"; |
e661a20b | 3400 | ::arg().setSwitch( "any-to-tcp","Answer ANY queries with tc=1, shunting to TCP" )="no"; |
b3adda56 | 3401 | ::arg().setSwitch( "lowercase-outgoing","Force outgoing questions to lowercase")="no"; |
00b8cadc | 3402 | ::arg().setSwitch("gettag-needs-edns-options", "If EDNS Options should be extracted before calling the gettag() hook")="no"; |
a09a8ce0 | 3403 | ::arg().set("udp-truncation-threshold", "Maximum UDP response size before we truncate")="1680"; |
b33c2462 | 3404 | ::arg().set("edns-outgoing-bufsize", "Outgoing EDNS buffer size")="1680"; |
aadceba8 | 3405 | ::arg().set("minimum-ttl-override", "Set under adverse conditions, a minimum TTL")="0"; |
173d790e | 3406 | ::arg().set("max-qperq", "Maximum outgoing queries per query")="50"; |
c5950146 | 3407 | ::arg().set("max-total-msec", "Maximum total wall-clock time per query in milliseconds, 0 for unlimited")="7000"; |
7c3398aa | 3408 | ::arg().set("max-recursion-depth", "Maximum number of internal recursion calls per query, 0 for unlimited")="40"; |
a09a8ce0 | 3409 | |
68e6df3c | 3410 | ::arg().set("include-dir","Include *.conf files from this directory")=""; |
d67620e4 | 3411 | ::arg().set("security-poll-suffix","Domain name from which to query security update notifications")="secpoll.powerdns.com."; |
2332f42d | 3412 | |
3413 | ::arg().setSwitch("reuseport","Enable SO_REUSEPORT allowing multiple recursors processes to listen to 1 address")="no"; | |
2e3d8a19 | 3414 | |
d705aad9 | 3415 | ::arg().setSwitch("snmp-agent", "If set, register as an SNMP agent")="no"; |
396f126e | 3416 | ::arg().set("snmp-master-socket", "If set and snmp-agent is set, the socket to use to register to the SNMP master")=""; |
d705aad9 | 3417 | |
0735b17e | 3418 | ::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 | 3419 | ::arg().set("nsec3-max-iterations", "Maximum number of iterations allowed for an NSEC3 record")="2500"; |
0735b17e | 3420 | |
8fd25133 RG |
3421 | ::arg().set("cpu-map", "Thread to CPU mapping, space separated thread-id=cpu1,cpu2..cpuN pairs")=""; |
3422 | ||
98d36505 RG |
3423 | ::arg().setSwitch("log-rpz-changes", "Log additions and removals to RPZ zones at Info level")="no"; |
3424 | ||
2e3d8a19 | 3425 | ::arg().setCmd("help","Provide a helpful message"); |
ba1a571d | 3426 | ::arg().setCmd("version","Print version string"); |
d5141417 | 3427 | ::arg().setCmd("config","Output blank configuration"); |
f27e6356 | 3428 | L.toConsole(Logger::Info); |
2e3d8a19 | 3429 | ::arg().laxParse(argc,argv); // do a lax parse |
c75a6a9e | 3430 | |
2d733c0f CH |
3431 | string configname=::arg()["config-dir"]+"/recursor.conf"; |
3432 | if(::arg()["config-name"]!="") { | |
3433 | configname=::arg()["config-dir"]+"/recursor-"+::arg()["config-name"]+".conf"; | |
5124de27 | 3434 | s_programname+="-"+::arg()["config-name"]; |
2d733c0f CH |
3435 | } |
3436 | cleanSlashes(configname); | |
5124de27 | 3437 | |
577cf284 BH |
3438 | if(::arg().mustDo("config")) { |
3439 | cout<<::arg().configstring()<<endl; | |
3440 | exit(0); | |
3441 | } | |
3442 | ||
3ddb9247 | 3443 | if(!::arg().file(configname.c_str())) |
c75a6a9e BH |
3444 | L<<Logger::Warning<<"Unable to parse configuration file '"<<configname<<"'"<<endl; |
3445 | ||
2e3d8a19 | 3446 | ::arg().parse(argc,argv); |
c836dc19 | 3447 | |
f0f3f0b0 PL |
3448 | if( !::arg()["chroot"].empty() && !::arg()["api-config-dir"].empty() && !::arg().mustDo("api-readonly") ) { |
3449 | L<<Logger::Error<<"Using chroot and a writable API is not possible"<<endl; | |
3450 | exit(EXIT_FAILURE); | |
3451 | } | |
3452 | ||
3453 | if (::arg()["socket-dir"].empty()) { | |
3454 | if (::arg()["chroot"].empty()) | |
3455 | ::arg().set("socket-dir") = LOCALSTATEDIR; | |
3456 | else | |
3457 | ::arg().set("socket-dir") = "/"; | |
3458 | } | |
3459 | ||
2e3d8a19 | 3460 | ::arg().set("delegation-only")=toLower(::arg()["delegation-only"]); |
562588a3 | 3461 | |
61d74169 | 3462 | if(::arg().asNum("threads")==1) |
3463 | ::arg().set("pdns-distributes-queries")="no"; | |
3464 | ||
2e3d8a19 | 3465 | if(::arg().mustDo("help")) { |
ff5ba4f9 WA |
3466 | cout<<"syntax:"<<endl<<endl; |
3467 | cout<<::arg().helpstring(::arg()["help"])<<endl; | |
3468 | exit(0); | |
b636533b | 3469 | } |
5e3de507 | 3470 | if(::arg().mustDo("version")) { |
ba1a571d | 3471 | showProductVersion(); |
3613a51c | 3472 | showBuildConfiguration(); |
67076869 | 3473 | exit(0); |
5e3de507 | 3474 | } |
b636533b | 3475 | |
34162f8f | 3476 | Logger::Urgency logUrgency = (Logger::Urgency)::arg().asNum("loglevel"); |
f48d7b65 | 3477 | |
34162f8f CH |
3478 | if (logUrgency < Logger::Error) |
3479 | logUrgency = Logger::Error; | |
f48d7b65 | 3480 | if(!g_quiet && logUrgency < Logger::Info) { // Logger::Info=6, Logger::Debug=7 |
3481 | logUrgency = Logger::Info; // if you do --quiet=no, you need Info to also see the query log | |
3482 | } | |
34162f8f CH |
3483 | L.setLoglevel(logUrgency); |
3484 | L.toConsole(logUrgency); | |
3485 | ||
f7c1d4e3 | 3486 | serviceMain(argc, argv); |
288f4aa9 | 3487 | } |
3f81d239 | 3488 | catch(PDNSException &ae) { |
c836dc19 | 3489 | L<<Logger::Error<<"Exception: "<<ae.reason<<endl; |
22030c37 | 3490 | ret=EXIT_FAILURE; |
288f4aa9 | 3491 | } |
fdbf35ac | 3492 | catch(std::exception &e) { |
c836dc19 | 3493 | L<<Logger::Error<<"STL Exception: "<<e.what()<<endl; |
22030c37 | 3494 | ret=EXIT_FAILURE; |
288f4aa9 BH |
3495 | } |
3496 | catch(...) { | |
c836dc19 | 3497 | L<<Logger::Error<<"any other exception in main: "<<endl; |
22030c37 | 3498 | ret=EXIT_FAILURE; |
288f4aa9 | 3499 | } |
3ddb9247 | 3500 | |
22030c37 | 3501 | return ret; |
288f4aa9 | 3502 | } |