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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 | ||
5cc8371b RG |
97 | #include "xpf.hh" |
98 | ||
d187038c RG |
99 | typedef map<ComboAddress, uint32_t, ComboAddress::addressOnlyLessThan> tcpClientCounts_t; |
100 | ||
f26bf547 RG |
101 | static thread_local std::shared_ptr<RecursorLua4> t_pdl; |
102 | static thread_local unsigned int t_id; | |
103 | static thread_local std::shared_ptr<Regex> t_traceRegex; | |
104 | static thread_local std::unique_ptr<tcpClientCounts_t> t_tcpClientCounts; | |
105 | ||
106 | thread_local std::unique_ptr<MT_t> MT; // the big MTasker | |
107 | thread_local std::unique_ptr<MemRecursorCache> t_RC; | |
108 | thread_local std::unique_ptr<RecursorPacketCache> t_packetCache; | |
3337c2f7 | 109 | thread_local FDMultiplexer* t_fdm{nullptr}; |
f26bf547 RG |
110 | thread_local std::unique_ptr<addrringbuf_t> t_remotes, t_servfailremotes, t_largeanswerremotes; |
111 | thread_local std::unique_ptr<boost::circular_buffer<pair<DNSName, uint16_t> > > t_queryring, t_servfailqueryring; | |
112 | thread_local std::shared_ptr<NetmaskGroup> t_allowFrom; | |
aa7929a3 | 113 | #ifdef HAVE_PROTOBUF |
f26bf547 | 114 | thread_local std::unique_ptr<boost::uuids::random_generator> t_uuidGenerator; |
aa7929a3 | 115 | #endif |
d187038c | 116 | __thread struct timeval g_now; // timestamp, updated (too) frequently |
d7dae798 BH |
117 | |
118 | // for communicating with our threads | |
49a699c4 BH |
119 | struct ThreadPipeSet |
120 | { | |
121 | int writeToThread; | |
122 | int readToThread; | |
123 | int writeFromThread; | |
124 | int readFromThread; | |
125 | }; | |
810ff705 | 126 | |
d187038c RG |
127 | typedef vector<int> tcpListenSockets_t; |
128 | typedef map<int, ComboAddress> listenSocketsAddresses_t; // is shared across all threads right now | |
129 | typedef vector<pair<int, function< void(int, any&) > > > deferredAdd_t; | |
3ea54bf0 | 130 | |
d187038c RG |
131 | static const ComboAddress g_local4("0.0.0.0"), g_local6("::"); |
132 | static vector<ThreadPipeSet> g_pipes; // effectively readonly after startup | |
133 | static tcpListenSockets_t g_tcpListenSockets; // shared across threads, but this is fine, never written to from a thread. All threads listen on all sockets | |
134 | static listenSocketsAddresses_t g_listenSocketsAddresses; // is shared across all threads right now | |
810ff705 | 135 | static std::unordered_map<unsigned int, deferredAdd_t> deferredAdds; |
d187038c RG |
136 | static set<int> g_fromtosockets; // listen sockets that use 'sendfromto()' mechanism |
137 | static vector<ComboAddress> g_localQueryAddresses4, g_localQueryAddresses6; | |
138 | static AtomicCounter counter; | |
9065eb05 | 139 | static std::shared_ptr<SyncRes::domainmap_t> g_initialDomainMap; // new threads needs this to be setup |
f26bf547 | 140 | static std::shared_ptr<NetmaskGroup> g_initialAllowFrom; // new thread needs to be setup with this |
5cc8371b | 141 | static NetmaskGroup g_XPFAcl; |
d187038c RG |
142 | static size_t g_tcpMaxQueriesPerConn; |
143 | static uint64_t g_latencyStatSize; | |
144 | static uint32_t g_disthashseed; | |
145 | static unsigned int g_maxTCPPerClient; | |
146 | static unsigned int g_networkTimeoutMsec; | |
147 | static unsigned int g_maxMThreads; | |
148 | static unsigned int g_numWorkerThreads; | |
149 | static int g_tcpTimeout; | |
150 | static uint16_t g_udpTruncationThreshold; | |
59cb4a79 | 151 | static uint16_t g_xpfRRCode{0}; |
d187038c RG |
152 | static std::atomic<bool> statsWanted; |
153 | static std::atomic<bool> g_quiet; | |
154 | static bool g_logCommonErrors; | |
155 | static bool g_anyToTcp; | |
d187038c | 156 | static bool g_weDistributeQueries; // if true, only 1 thread listens on the incoming query sockets |
810ff705 RG |
157 | static bool g_reusePort{false}; |
158 | static bool g_useOneSocketPerThread; | |
00b8cadc | 159 | static bool g_gettagNeedsEDNSOptions{false}; |
0ec489bf | 160 | static time_t g_statisticsInterval; |
9065eb05 | 161 | static bool g_useIncomingECS; |
a6f7f5fe | 162 | std::atomic<uint32_t> g_maxCacheEntries, g_maxPacketCacheEntries; |
49a699c4 | 163 | |
d187038c RG |
164 | RecursorControlChannel s_rcc; // only active in thread 0 |
165 | RecursorStats g_stats; | |
2d733c0f | 166 | string s_programname="pdns_recursor"; |
d187038c | 167 | string s_pidfname; |
c1c29961 | 168 | bool g_lowercaseOutgoing; |
d187038c RG |
169 | unsigned int g_numThreads; |
170 | uint16_t g_outgoingEDNSBufsize; | |
98d36505 | 171 | bool g_logRPZChanges{false}; |
c3828c03 | 172 | |
12cd44ee | 173 | #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 | 174 | #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 | 175 | // Bad Nets taken from both: |
3ddb9247 | 176 | // http://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml |
12cd44ee | 177 | // and |
178 | // http://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml | |
179 | // where such a network may not be considered a valid destination | |
180 | #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" | |
181 | #define DONT_QUERY LOCAL_NETS ", " BAD_NETS | |
49a699c4 | 182 | |
d7dae798 | 183 | //! used to send information to a newborn mthread |
ea634573 | 184 | struct DNSComboWriter { |
27c0050c | 185 | DNSComboWriter(const char* data, uint16_t len, const struct timeval& now) : d_mdp(true, data, len), d_now(now), |
232f0877 | 186 | d_tcp(false), d_socket(-1) |
ea634573 | 187 | {} |
5cc8371b RG |
188 | |
189 | void setRemote(const ComboAddress& sa) | |
190 | { | |
191 | d_remote=sa; | |
192 | } | |
193 | ||
194 | void setSource(const ComboAddress& sa) | |
ea634573 | 195 | { |
5cc8371b | 196 | d_source=sa; |
ea634573 BH |
197 | } |
198 | ||
b71b60ee | 199 | void setLocal(const ComboAddress& sa) |
200 | { | |
201 | d_local=sa; | |
202 | } | |
203 | ||
5cc8371b RG |
204 | void setDestination(const ComboAddress& sa) |
205 | { | |
206 | d_destination=sa; | |
207 | } | |
b71b60ee | 208 | |
ea634573 BH |
209 | void setSocket(int sock) |
210 | { | |
211 | d_socket=sock; | |
212 | } | |
a1754c6a BH |
213 | |
214 | string getRemote() const | |
215 | { | |
5cc8371b RG |
216 | if (d_source == d_remote) { |
217 | return d_source.toStringWithPort(); | |
218 | } | |
219 | return d_source.toStringWithPort() + " (proxied by " + d_remote.toStringWithPort() + ")"; | |
a1754c6a BH |
220 | } |
221 | ||
5cc8371b | 222 | MOADNSParser d_mdp; |
c9e9e5e0 | 223 | struct timeval d_now; |
5cc8371b RG |
224 | /* Remote client, might differ from d_source |
225 | in case of XPF, in which case d_source holds | |
226 | the IP of the client and d_remote of the proxy | |
227 | */ | |
228 | ComboAddress d_remote; | |
229 | ComboAddress d_source; | |
230 | /* Destination address, might differ from | |
231 | d_destination in case of XPF, in which case | |
232 | d_destination holds the IP of the proxy and | |
233 | d_local holds our own. */ | |
234 | ComboAddress d_local; | |
235 | ComboAddress d_destination; | |
aa7929a3 RG |
236 | #ifdef HAVE_PROTOBUF |
237 | boost::uuids::uuid d_uuid; | |
67e31ebe | 238 | string d_requestorId; |
590388d2 | 239 | string d_deviceId; |
aa7929a3 | 240 | #endif |
b40562da RG |
241 | EDNSSubnetOpts d_ednssubnet; |
242 | bool d_ecsFound{false}; | |
243 | bool d_ecsParsed{false}; | |
ea634573 BH |
244 | bool d_tcp; |
245 | int d_socket; | |
b673817a | 246 | unsigned int d_tag{0}; |
e9f63d47 | 247 | uint32_t d_qhash{0}; |
49a3500d | 248 | string d_query; |
cd989c87 | 249 | shared_ptr<TCPConnection> d_tcpConnection; |
e8340d27 | 250 | vector<pair<uint16_t, string> > d_ednsOpts; |
02b47f43 | 251 | std::vector<std::string> d_policyTags; |
5fd2577f | 252 | LuaContext::LuaObject d_data; |
ea634573 BH |
253 | }; |
254 | ||
06857845 RG |
255 | MT_t* getMT() |
256 | { | |
257 | return MT ? MT.get() : nullptr; | |
258 | } | |
ea634573 | 259 | |
288f4aa9 BH |
260 | ArgvMap &arg() |
261 | { | |
262 | static ArgvMap theArg; | |
263 | return theArg; | |
264 | } | |
4ef015cd | 265 | |
b4015453 RG |
266 | unsigned int getRecursorThreadId() |
267 | { | |
268 | return t_id; | |
269 | } | |
09e6702a | 270 | |
30ee601a RG |
271 | int getMTaskerTID() |
272 | { | |
273 | return MT->getTid(); | |
274 | } | |
275 | ||
d187038c | 276 | static void handleTCPClientWritable(int fd, FDMultiplexer::funcparam_t& var); |
09e6702a | 277 | |
50c81227 | 278 | // -1 is error, 0 is timeout, 1 is success |
3ddb9247 | 279 | int asendtcp(const string& data, Socket* sock) |
5c633640 BH |
280 | { |
281 | PacketID pident; | |
282 | pident.sock=sock; | |
283 | pident.outMSG=data; | |
3ddb9247 | 284 | |
bb4bdbaf | 285 | t_fdm->addWriteFD(sock->getHandle(), handleTCPClientWritable, pident); |
50c81227 | 286 | string packet; |
5c633640 | 287 | |
5b0ddd18 | 288 | int ret=MT->waitEvent(pident, &packet, g_networkTimeoutMsec); |
23db0a09 | 289 | |
9170fbaf | 290 | if(!ret || ret==-1) { // timeout |
bb4bdbaf | 291 | t_fdm->removeWriteFD(sock->getHandle()); |
5c633640 | 292 | } |
50c81227 BH |
293 | else if(packet.size() !=data.size()) { // main loop tells us what it sent out, or empty in case of an error |
294 | return -1; | |
295 | } | |
9170fbaf | 296 | return ret; |
5c633640 BH |
297 | } |
298 | ||
d187038c | 299 | static void handleTCPClientReadable(int fd, FDMultiplexer::funcparam_t& var); |
09e6702a | 300 | |
9170fbaf | 301 | // -1 is error, 0 is timeout, 1 is success |
a683e8bd | 302 | int arecvtcp(string& data, size_t len, Socket* sock, bool incompleteOkay) |
288f4aa9 | 303 | { |
50c81227 | 304 | data.clear(); |
5c633640 BH |
305 | PacketID pident; |
306 | pident.sock=sock; | |
307 | pident.inNeeded=len; | |
825fa717 | 308 | pident.inIncompleteOkay=incompleteOkay; |
bb4bdbaf | 309 | t_fdm->addReadFD(sock->getHandle(), handleTCPClientReadable, pident); |
5c633640 | 310 | |
bb4bdbaf | 311 | int ret=MT->waitEvent(pident,&data, g_networkTimeoutMsec); |
9170fbaf | 312 | if(!ret || ret==-1) { // timeout |
bb4bdbaf | 313 | t_fdm->removeReadFD(sock->getHandle()); |
288f4aa9 | 314 | } |
50c81227 BH |
315 | else if(data.empty()) {// error, EOF or other |
316 | return -1; | |
317 | } | |
318 | ||
9170fbaf | 319 | return ret; |
288f4aa9 BH |
320 | } |
321 | ||
d187038c | 322 | static void handleGenUDPQueryResponse(int fd, FDMultiplexer::funcparam_t& var) |
4465e941 | 323 | { |
fba1e944 | 324 | PacketID pident=*any_cast<PacketID>(&var); |
4465e941 | 325 | char resp[512]; |
7c77ce63 RG |
326 | ComboAddress fromaddr; |
327 | socklen_t addrlen=sizeof(fromaddr); | |
328 | ||
329 | ssize_t ret=recvfrom(fd, resp, sizeof(resp), 0, (sockaddr *)&fromaddr, &addrlen); | |
330 | if (fromaddr != pident.remote) { | |
331 | L<<Logger::Notice<<"Response received from the wrong remote host ("<<fromaddr.toStringWithPort()<<" instead of "<<pident.remote.toStringWithPort()<<"), discarding"<<endl; | |
332 | ||
333 | } | |
334 | ||
4465e941 | 335 | t_fdm->removeReadFD(fd); |
336 | if(ret >= 0) { | |
a683e8bd | 337 | string data(resp, (size_t) ret); |
fba1e944 | 338 | MT->sendEvent(pident, &data); |
4465e941 | 339 | } |
340 | else { | |
fba1e944 | 341 | string empty; |
342 | MT->sendEvent(pident, &empty); | |
343 | // cerr<<"Had some kind of error: "<<ret<<", "<<strerror(errno)<<endl; | |
4465e941 | 344 | } |
345 | } | |
fba1e944 | 346 | string GenUDPQueryResponse(const ComboAddress& dest, const string& query) |
4465e941 | 347 | { |
4465e941 | 348 | Socket s(dest.sin4.sin_family, SOCK_DGRAM); |
349 | s.setNonBlocking(); | |
350 | ComboAddress local = getQueryLocalAddress(dest.sin4.sin_family, 0); | |
351 | ||
352 | s.bind(local); | |
353 | s.connect(dest); | |
4465e941 | 354 | s.send(query); |
355 | ||
356 | PacketID pident; | |
357 | pident.sock=&s; | |
7c77ce63 | 358 | pident.remote=dest; |
4465e941 | 359 | pident.type=0; |
fba1e944 | 360 | t_fdm->addReadFD(s.getHandle(), handleGenUDPQueryResponse, pident); |
4465e941 | 361 | |
362 | string data; | |
fba1e944 | 363 | |
4465e941 | 364 | int ret=MT->waitEvent(pident,&data, g_networkTimeoutMsec); |
fba1e944 | 365 | |
4465e941 | 366 | if(!ret || ret==-1) { // timeout |
4465e941 | 367 | t_fdm->removeReadFD(s.getHandle()); |
368 | } | |
369 | else if(data.empty()) {// error, EOF or other | |
fba1e944 | 370 | // we could special case this |
4465e941 | 371 | return data; |
372 | } | |
4465e941 | 373 | return data; |
374 | } | |
375 | ||
d7dae798 | 376 | //! pick a random query local address |
1652a63e | 377 | ComboAddress getQueryLocalAddress(int family, uint16_t port) |
5a38281c | 378 | { |
1652a63e | 379 | ComboAddress ret; |
5a38281c | 380 | if(family==AF_INET) { |
3ddb9247 | 381 | if(g_localQueryAddresses4.empty()) |
1652a63e | 382 | ret = g_local4; |
3ddb9247 | 383 | else |
1652a63e BH |
384 | ret = g_localQueryAddresses4[dns_random(g_localQueryAddresses4.size())]; |
385 | ret.sin4.sin_port = htons(port); | |
5a38281c BH |
386 | } |
387 | else { | |
388 | if(g_localQueryAddresses6.empty()) | |
1652a63e BH |
389 | ret = g_local6; |
390 | else | |
391 | ret = g_localQueryAddresses6[dns_random(g_localQueryAddresses6.size())]; | |
3ddb9247 | 392 | |
1652a63e | 393 | ret.sin6.sin6_port = htons(port); |
5a38281c | 394 | } |
1652a63e | 395 | return ret; |
5a38281c | 396 | } |
4ef015cd | 397 | |
d187038c | 398 | static void handleUDPServerResponse(int fd, FDMultiplexer::funcparam_t&); |
09e6702a | 399 | |
d187038c | 400 | static void setSocketBuffer(int fd, int optname, uint32_t size) |
d7dae798 BH |
401 | { |
402 | uint32_t psize=0; | |
403 | socklen_t len=sizeof(psize); | |
3ddb9247 | 404 | |
d7dae798 BH |
405 | if(!getsockopt(fd, SOL_SOCKET, optname, (char*)&psize, &len) && psize > size) { |
406 | L<<Logger::Error<<"Not decreasing socket buffer size from "<<psize<<" to "<<size<<endl; | |
3ddb9247 | 407 | return; |
d7dae798 BH |
408 | } |
409 | ||
410 | if (setsockopt(fd, SOL_SOCKET, optname, (char*)&size, sizeof(size)) < 0 ) | |
c057bfaa | 411 | L<<Logger::Error<<"Unable to raise socket buffer size to "<<size<<": "<<strerror(errno)<<endl; |
d7dae798 BH |
412 | } |
413 | ||
414 | ||
415 | static void setSocketReceiveBuffer(int fd, uint32_t size) | |
416 | { | |
417 | setSocketBuffer(fd, SO_RCVBUF, size); | |
418 | } | |
419 | ||
420 | static void setSocketSendBuffer(int fd, uint32_t size) | |
421 | { | |
422 | setSocketBuffer(fd, SO_SNDBUF, size); | |
423 | } | |
424 | ||
425 | ||
4ef015cd BH |
426 | // you can ask this class for a UDP socket to send a query from |
427 | // this socket is not yours, don't even think about deleting it | |
428 | // but after you call 'returnSocket' on it, don't assume anything anymore | |
429 | class UDPClientSocks | |
430 | { | |
4ef015cd | 431 | unsigned int d_numsocks; |
4ef015cd | 432 | public: |
e2642526 | 433 | UDPClientSocks() : d_numsocks(0) |
4ef015cd BH |
434 | { |
435 | } | |
436 | ||
996c89cc | 437 | typedef set<int> socks_t; |
4ef015cd BH |
438 | socks_t d_socks; |
439 | ||
2ee280cf | 440 | // returning -2 means: temporary OS error (ie, out of files), -1 means error related to remote |
d8f6d49f | 441 | int getSocket(const ComboAddress& toaddr, int* fd) |
4ef015cd | 442 | { |
d8f6d49f BH |
443 | *fd=makeClientSocket(toaddr.sin4.sin_family); |
444 | if(*fd < 0) // temporary error - receive exception otherwise | |
2ee280cf | 445 | return -2; |
d8f6d49f BH |
446 | |
447 | if(connect(*fd, (struct sockaddr*)(&toaddr), toaddr.getSocklen()) < 0) { | |
448 | int err = errno; | |
41ff43f8 | 449 | // returnSocket(*fd); |
a7b68ae7 RG |
450 | try { |
451 | closesocket(*fd); | |
452 | } | |
453 | catch(const PDNSException& e) { | |
454 | L<<Logger::Error<<"Error closing UDP socket after connect() failed: "<<e.reason<<endl; | |
455 | } | |
456 | ||
d8f6d49f | 457 | if(err==ENETUNREACH) // Seth "My Interfaces Are Like A Yo Yo" Arnold special |
4957a608 | 458 | return -2; |
998a4334 | 459 | return -1; |
d8f6d49f | 460 | } |
998a4334 | 461 | |
d8f6d49f | 462 | d_socks.insert(*fd); |
998a4334 | 463 | d_numsocks++; |
d8f6d49f | 464 | return 0; |
4ef015cd BH |
465 | } |
466 | ||
095c3045 BH |
467 | void returnSocket(int fd) |
468 | { | |
469 | socks_t::iterator i=d_socks.find(fd); | |
34801ab1 | 470 | if(i==d_socks.end()) { |
335da0ba | 471 | throw PDNSException("Trying to return a socket (fd="+std::to_string(fd)+") not in the pool"); |
34801ab1 | 472 | } |
bb4bdbaf | 473 | returnSocketLocked(i); |
095c3045 BH |
474 | } |
475 | ||
4ef015cd | 476 | // return a socket to the pool, or simply erase it |
bb4bdbaf | 477 | void returnSocketLocked(socks_t::iterator& i) |
4ef015cd | 478 | { |
600fc20b | 479 | if(i==d_socks.end()) { |
3f81d239 | 480 | throw PDNSException("Trying to return a socket not in the pool"); |
600fc20b | 481 | } |
80baf329 | 482 | try { |
bb4bdbaf | 483 | t_fdm->removeReadFD(*i); |
80baf329 BH |
484 | } |
485 | catch(FDMultiplexerException& e) { | |
bb4bdbaf | 486 | // we sometimes return a socket that has not yet been assigned to t_fdm |
80baf329 | 487 | } |
a7b68ae7 RG |
488 | try { |
489 | closesocket(*i); | |
490 | } | |
491 | catch(const PDNSException& e) { | |
492 | L<<Logger::Error<<"Error closing returned UDP socket: "<<e.reason<<endl; | |
493 | } | |
3ddb9247 | 494 | |
998a4334 BH |
495 | d_socks.erase(i++); |
496 | --d_numsocks; | |
4ef015cd | 497 | } |
d8f6d49f BH |
498 | |
499 | // returns -1 for errors which might go away, throws for ones that won't | |
bb4bdbaf | 500 | static int makeClientSocket(int family) |
d8f6d49f | 501 | { |
a683e8bd | 502 | 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 | 503 | |
d8f6d49f BH |
504 | if(ret < 0 && errno==EMFILE) // this is not a catastrophic error |
505 | return ret; | |
3ddb9247 PD |
506 | |
507 | if(ret<0) | |
335da0ba | 508 | throw PDNSException("Making a socket for resolver (family = "+std::to_string(family)+"): "+stringerror()); |
36855b53 | 509 | |
7eb73ffa | 510 | // setCloseOnExec(ret); // we're not going to exec |
5a38281c | 511 | |
d8f6d49f | 512 | int tries=10; |
3aa91c3e | 513 | ComboAddress sin; |
d8f6d49f | 514 | while(--tries) { |
1652a63e | 515 | uint16_t port; |
3ddb9247 | 516 | |
d8f6d49f | 517 | if(tries==1) // fall back to kernel 'random' |
4957a608 | 518 | port = 0; |
1652a63e BH |
519 | else |
520 | port = 1025 + dns_random(64510); | |
5a38281c | 521 | |
3aa91c3e | 522 | sin=getQueryLocalAddress(family, port); // does htons for us |
5a38281c | 523 | |
3ddb9247 | 524 | if (::bind(ret, (struct sockaddr *)&sin, sin.getSocklen()) >= 0) |
4957a608 | 525 | break; |
d8f6d49f BH |
526 | } |
527 | if(!tries) | |
3aa91c3e | 528 | throw PDNSException("Resolver binding to local query client socket on "+sin.toString()+": "+stringerror()); |
3ddb9247 | 529 | |
3897b9e1 | 530 | setNonBlocking(ret); |
d8f6d49f BH |
531 | return ret; |
532 | } | |
49a699c4 BH |
533 | }; |
534 | ||
f26bf547 | 535 | static thread_local std::unique_ptr<UDPClientSocks> t_udpclientsocks; |
4ef015cd | 536 | |
288f4aa9 | 537 | /* these two functions are used by LWRes */ |
34801ab1 | 538 | // -2 is OS error, -1 is error that depends on the remote, > 0 is success |
a683e8bd | 539 | int asendto(const char *data, size_t len, int flags, |
3ddb9247 | 540 | const ComboAddress& toaddr, uint16_t id, const DNSName& domain, uint16_t qtype, int* fd) |
288f4aa9 | 541 | { |
34801ab1 BH |
542 | |
543 | PacketID pident; | |
787e5eab BH |
544 | pident.domain = domain; |
545 | pident.remote = toaddr; | |
546 | pident.type = qtype; | |
34801ab1 BH |
547 | |
548 | // see if there is an existing outstanding request we can chain on to, using partial equivalence function | |
549 | pair<MT_t::waiters_t::iterator, MT_t::waiters_t::iterator> chain=MT->d_waiters.equal_range(pident, PacketIDBirthdayCompare()); | |
550 | ||
551 | for(; chain.first != chain.second; chain.first++) { | |
552 | if(chain.first->key.fd > -1) { // don't chain onto existing chained waiter! | |
e27e91a8 | 553 | /* |
4665c31e BH |
554 | cerr<<"Orig: "<<pident.domain<<", "<<pident.remote.toString()<<", id="<<id<<endl; |
555 | cerr<<"Had hit: "<< chain.first->key.domain<<", "<<chain.first->key.remote.toString()<<", id="<<chain.first->key.id | |
4957a608 | 556 | <<", count="<<chain.first->key.chain.size()<<", origfd: "<<chain.first->key.fd<<endl; |
e27e91a8 | 557 | */ |
34801ab1 BH |
558 | chain.first->key.chain.insert(id); // we can chain |
559 | *fd=-1; // gets used in waitEvent / sendEvent later on | |
560 | return 1; | |
561 | } | |
562 | } | |
563 | ||
49a699c4 | 564 | int ret=t_udpclientsocks->getSocket(toaddr, fd); |
d8f6d49f BH |
565 | if(ret < 0) |
566 | return ret; | |
34801ab1 | 567 | |
998a4334 BH |
568 | pident.fd=*fd; |
569 | pident.id=id; | |
3ddb9247 | 570 | |
bb4bdbaf BH |
571 | t_fdm->addReadFD(*fd, handleUDPServerResponse, pident); |
572 | ret = send(*fd, data, len, 0); | |
573 | ||
5b0ddd18 | 574 | int tmp = errno; |
bb4bdbaf | 575 | |
7302ed0a | 576 | if(ret < 0) |
49a699c4 | 577 | t_udpclientsocks->returnSocket(*fd); |
bb4bdbaf | 578 | |
5b0ddd18 | 579 | errno = tmp; // this is for logging purposes only |
7302ed0a | 580 | return ret; |
288f4aa9 BH |
581 | } |
582 | ||
9170fbaf | 583 | // -1 is error, 0 is timeout, 1 is success |
a683e8bd | 584 | int arecvfrom(char *data, size_t len, int flags, const ComboAddress& fromaddr, size_t *d_len, |
c5c066bf | 585 | uint16_t id, const DNSName& domain, uint16_t qtype, int fd, struct timeval* now) |
288f4aa9 | 586 | { |
0d5f0a9f | 587 | static optional<unsigned int> nearMissLimit; |
3ddb9247 | 588 | if(!nearMissLimit) |
0d5f0a9f BH |
589 | nearMissLimit=::arg().asNum("spoof-nearmiss-max"); |
590 | ||
288f4aa9 | 591 | PacketID pident; |
4ef015cd | 592 | pident.fd=fd; |
288f4aa9 | 593 | pident.id=id; |
0d5f0a9f | 594 | pident.domain=domain; |
787e5eab | 595 | pident.type = qtype; |
996c89cc | 596 | pident.remote=fromaddr; |
b636533b | 597 | |
288f4aa9 | 598 | string packet; |
5b0ddd18 | 599 | int ret=MT->waitEvent(pident, &packet, g_networkTimeoutMsec, now); |
34801ab1 | 600 | |
9170fbaf | 601 | if(ret > 0) { |
996c89cc | 602 | if(packet.empty()) // means "error" |
3ddb9247 | 603 | return -1; |
998a4334 | 604 | |
a683e8bd | 605 | *d_len=packet.size(); |
9170fbaf | 606 | memcpy(data,packet.c_str(),min(len,*d_len)); |
0d5f0a9f | 607 | if(*nearMissLimit && pident.nearMisses > *nearMissLimit) { |
996c89cc | 608 | L<<Logger::Error<<"Too many ("<<pident.nearMisses<<" > "<<*nearMissLimit<<") bogus answers for '"<<domain<<"' from "<<fromaddr.toString()<<", assuming spoof attempt."<<endl; |
0d5f0a9f | 609 | g_stats.spoofCount++; |
35ce8576 BH |
610 | return -1; |
611 | } | |
288f4aa9 | 612 | } |
09e6702a | 613 | else { |
34801ab1 | 614 | if(fd >= 0) |
49a699c4 | 615 | t_udpclientsocks->returnSocket(fd); |
09e6702a | 616 | } |
9170fbaf | 617 | return ret; |
288f4aa9 BH |
618 | } |
619 | ||
88def049 BH |
620 | static void writePid(void) |
621 | { | |
191f2e47 | 622 | if(!::arg().mustDo("write-pid")) |
623 | return; | |
18e7758c | 624 | ofstream of(s_pidfname.c_str(), std::ios_base::app); |
88def049 | 625 | if(of) |
705f31ae | 626 | of<< Utility::getpid() <<endl; |
88def049 | 627 | else |
c057bfaa | 628 | L<<Logger::Error<<"Writing pid for "<<Utility::getpid()<<" to "<<s_pidfname<<" failed: "<<strerror(errno)<<endl; |
88def049 BH |
629 | } |
630 | ||
cd989c87 | 631 | TCPConnection::TCPConnection(int fd, const ComboAddress& addr) : d_remote(addr), d_fd(fd) |
3ddb9247 PD |
632 | { |
633 | ++s_currentConnections; | |
cd989c87 | 634 | (*t_tcpClientCounts)[d_remote]++; |
0e408828 | 635 | } |
cd989c87 BH |
636 | |
637 | TCPConnection::~TCPConnection() | |
0e408828 | 638 | { |
a7b68ae7 RG |
639 | try { |
640 | if(closesocket(d_fd) < 0) | |
641 | L<<Logger::Error<<"Error closing socket for TCPConnection"<<endl; | |
642 | } | |
643 | catch(const PDNSException& e) { | |
644 | L<<Logger::Error<<"Error closing TCPConnection socket: "<<e.reason<<endl; | |
645 | } | |
646 | ||
3ddb9247 | 647 | if(t_tcpClientCounts->count(d_remote) && !(*t_tcpClientCounts)[d_remote]--) |
cd989c87 | 648 | t_tcpClientCounts->erase(d_remote); |
1bc9e6bd | 649 | --s_currentConnections; |
0e408828 | 650 | } |
0e9d9ce2 | 651 | |
3ddb9247 | 652 | AtomicCounter TCPConnection::s_currentConnections; |
d187038c RG |
653 | |
654 | static void handleRunningTCPQuestion(int fd, FDMultiplexer::funcparam_t& var); | |
6dcd28c3 | 655 | |
92011b8f | 656 | // the idea is, only do things that depend on the *response* here. Incoming accounting is on incoming. |
d187038c | 657 | static void updateResponseStats(int res, const ComboAddress& remote, unsigned int packetsize, const DNSName* query, uint16_t qtype) |
2cc13433 | 658 | { |
92011b8f | 659 | if(packetsize > 1000 && t_largeanswerremotes) |
660 | t_largeanswerremotes->push_back(remote); | |
2cc13433 BH |
661 | switch(res) { |
662 | case RCode::ServFail: | |
92011b8f | 663 | if(t_servfailremotes) { |
664 | t_servfailremotes->push_back(remote); | |
5af86fdc | 665 | if(query && t_servfailqueryring) // packet cache |
92011b8f | 666 | t_servfailqueryring->push_back(make_pair(*query, qtype)); |
667 | } | |
2cc13433 BH |
668 | g_stats.servFails++; |
669 | break; | |
670 | case RCode::NXDomain: | |
671 | g_stats.nxDomains++; | |
672 | break; | |
673 | case RCode::NoError: | |
674 | g_stats.noErrors++; | |
675 | break; | |
676 | } | |
677 | } | |
678 | ||
a903b39c | 679 | static string makeLoginfo(DNSComboWriter* dc) |
680 | try | |
681 | { | |
5cc8371b | 682 | return "("+dc->d_mdp.d_qname.toLogString()+"/"+DNSRecordContent::NumberToType(dc->d_mdp.d_qtype)+" from "+(dc->getRemote())+")"; |
a903b39c | 683 | } |
684 | catch(...) | |
685 | { | |
686 | return "Exception making error message for exception"; | |
687 | } | |
688 | ||
aa7929a3 | 689 | #ifdef HAVE_PROTOBUF |
590388d2 | 690 | 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 | 691 | { |
e1c8a4bb RG |
692 | Netmask requestorNM(remote, remote.sin4.sin_family == AF_INET ? maskV4 : maskV6); |
693 | const ComboAddress& requestor = requestorNM.getMaskedNetwork(); | |
694 | RecProtoBufMessage message(DNSProtoBufMessage::Query, uniqueId, &requestor, &local, qname, qtype, qclass, id, tcp, len); | |
a94bc5d7 | 695 | message.setEDNSSubnet(ednssubnet, ednssubnet.isIpv4() ? maskV4 : maskV6); |
67e31ebe | 696 | message.setRequestorId(requestorId); |
590388d2 | 697 | message.setDeviceId(deviceId); |
02b47f43 | 698 | |
02b47f43 | 699 | if (!policyTags.empty()) { |
d9d3f9c1 | 700 | message.setPolicyTags(policyTags); |
02b47f43 | 701 | } |
aa7929a3 | 702 | |
d9d3f9c1 | 703 | // cerr <<message.toDebugString()<<endl; |
aa7929a3 | 704 | std::string str; |
d9d3f9c1 | 705 | message.serialize(str); |
aa7929a3 | 706 | logger->queueData(str); |
aa7929a3 RG |
707 | } |
708 | ||
d9d3f9c1 | 709 | static void protobufLogResponse(const std::shared_ptr<RemoteLogger>& logger, const RecProtoBufMessage& message) |
aa7929a3 | 710 | { |
d9d3f9c1 | 711 | // cerr <<message.toDebugString()<<endl; |
aa7929a3 | 712 | std::string str; |
d9d3f9c1 | 713 | message.serialize(str); |
aa7929a3 | 714 | logger->queueData(str); |
aa7929a3 RG |
715 | } |
716 | #endif | |
717 | ||
53508135 PL |
718 | /** |
719 | * Chases the CNAME provided by the PolicyCustom RPZ policy. | |
720 | * | |
721 | * @param spoofed: The DNSRecord that was created by the policy, should already be added to ret | |
722 | * @param qtype: The QType of the original query | |
723 | * @param sr: A SyncRes | |
724 | * @param res: An integer that will contain the RCODE of the lookup we do | |
725 | * @param ret: A vector of DNSRecords where the result of the CNAME chase should be appended to | |
726 | */ | |
d187038c | 727 | static void handleRPZCustom(const DNSRecord& spoofed, const QType& qtype, SyncRes& sr, int& res, vector<DNSRecord>& ret) |
53508135 PL |
728 | { |
729 | if (spoofed.d_type == QType::CNAME) { | |
30ee601a RG |
730 | bool oldWantsRPZ = sr.getWantsRPZ(); |
731 | sr.setWantsRPZ(false); | |
53508135 PL |
732 | vector<DNSRecord> ans; |
733 | res = sr.beginResolve(DNSName(spoofed.d_content->getZoneRepresentation()), qtype, 1, ans); | |
734 | for (const auto& rec : ans) { | |
735 | if(rec.d_place == DNSResourceRecord::ANSWER) { | |
736 | ret.push_back(rec); | |
737 | } | |
738 | } | |
739 | // Reset the RPZ state of the SyncRes | |
30ee601a | 740 | sr.setWantsRPZ(oldWantsRPZ); |
53508135 PL |
741 | } |
742 | } | |
743 | ||
97c6d7e5 RG |
744 | static bool addRecordToPacket(DNSPacketWriter& pw, const DNSRecord& rec, uint32_t& minTTL, const uint16_t maxAnswerSize) |
745 | { | |
746 | pw.startRecord(rec.d_name, rec.d_type, rec.d_ttl, rec.d_class, rec.d_place); | |
747 | ||
748 | if(rec.d_type != QType::OPT) // their TTL ain't real | |
749 | minTTL = min(minTTL, rec.d_ttl); | |
750 | ||
751 | rec.d_content->toPacket(pw); | |
752 | if(pw.size() > static_cast<size_t>(maxAnswerSize)) { | |
753 | pw.rollback(); | |
754 | if(rec.d_place != DNSResourceRecord::ADDITIONAL) { | |
755 | pw.getHeader()->tc=1; | |
756 | pw.truncate(); | |
757 | } | |
758 | return false; | |
759 | } | |
760 | ||
761 | return true; | |
762 | } | |
763 | ||
d187038c | 764 | static void startDoResolve(void *p) |
288f4aa9 | 765 | { |
7b1469bb | 766 | DNSComboWriter* dc=(DNSComboWriter *)p; |
288f4aa9 | 767 | try { |
5af86fdc RG |
768 | if (t_queryring) |
769 | t_queryring->push_back(make_pair(dc->d_mdp.d_qname, dc->d_mdp.d_qtype)); | |
92011b8f | 770 | |
32015748 | 771 | uint16_t maxanswersize = dc->d_tcp ? 65535 : min(static_cast<uint16_t>(512), g_udpTruncationThreshold); |
7f7b8d55 | 772 | EDNSOpts edo; |
8e079f3a | 773 | bool haveEDNS=false; |
774 | if(getEDNSOpts(dc->d_mdp, &edo)) { | |
32015748 RG |
775 | if(!dc->d_tcp) { |
776 | /* rfc6891 6.2.3: | |
777 | "Values lower than 512 MUST be treated as equal to 512." | |
778 | */ | |
779 | maxanswersize = min(static_cast<uint16_t>(edo.d_packetsize >= 512 ? edo.d_packetsize : 512), g_udpTruncationThreshold); | |
780 | } | |
e8340d27 | 781 | dc->d_ednsOpts = edo.d_options; |
8e079f3a | 782 | haveEDNS=true; |
b40562da RG |
783 | |
784 | if (g_useIncomingECS && !dc->d_ecsParsed) { | |
785 | for (const auto& o : edo.d_options) { | |
786 | if (o.first == EDNSOptionCode::ECS) { | |
787 | dc->d_ecsFound = getEDNSSubnetOptsFromString(o.second, &dc->d_ednssubnet); | |
788 | break; | |
789 | } | |
790 | } | |
791 | } | |
10321a98 | 792 | } |
b40562da RG |
793 | /* perhaps there was no EDNS or no ECS but by now we looked */ |
794 | dc->d_ecsParsed = true; | |
e325f20c | 795 | vector<DNSRecord> ret; |
ea634573 | 796 | vector<uint8_t> packet; |
b23b8614 | 797 | |
ad42489c | 798 | auto luaconfsLocal = g_luaconfs.getLocal(); |
b8470add PL |
799 | // Used to tell syncres later on if we should apply NSDNAME and NSIP RPZ triggers for this query |
800 | bool wantsRPZ(true); | |
d9d3f9c1 | 801 | RecProtoBufMessage pbMessage(RecProtoBufMessage::Response); |
aa7929a3 | 802 | #ifdef HAVE_PROTOBUF |
d9d3f9c1 | 803 | if (luaconfsLocal->protobufServer) { |
5cc8371b | 804 | Netmask requestorNM(dc->d_source, dc->d_source.sin4.sin_family == AF_INET ? luaconfsLocal->protobufMaskV4 : luaconfsLocal->protobufMaskV6); |
e1c8a4bb | 805 | const ComboAddress& requestor = requestorNM.getMaskedNetwork(); |
5cc8371b | 806 | pbMessage.update(dc->d_uuid, &requestor, &dc->d_destination, dc->d_tcp, dc->d_mdp.d_header.id); |
b40562da | 807 | pbMessage.setEDNSSubnet(dc->d_ednssubnet.source, dc->d_ednssubnet.source.isIpv4() ? luaconfsLocal->protobufMaskV4 : luaconfsLocal->protobufMaskV6); |
d9d3f9c1 RG |
808 | pbMessage.setQuestion(dc->d_mdp.d_qname, dc->d_mdp.d_qtype, dc->d_mdp.d_qclass); |
809 | } | |
810 | #endif /* HAVE_PROTOBUF */ | |
ad42489c | 811 | |
3ddb9247 | 812 | DNSPacketWriter pw(packet, dc->d_mdp.d_qname, dc->d_mdp.d_qtype, dc->d_mdp.d_qclass); |
ea634573 BH |
813 | |
814 | pw.getHeader()->aa=0; | |
815 | pw.getHeader()->ra=1; | |
c154c8a4 | 816 | pw.getHeader()->qr=1; |
bb4bdbaf | 817 | pw.getHeader()->tc=0; |
ea634573 | 818 | pw.getHeader()->id=dc->d_mdp.d_header.id; |
10321a98 | 819 | pw.getHeader()->rd=dc->d_mdp.d_header.rd; |
57769f13 | 820 | pw.getHeader()->cd=dc->d_mdp.d_header.cd; |
ea634573 | 821 | |
904d3219 PD |
822 | uint32_t minTTL=std::numeric_limits<uint32_t>::max(); |
823 | ||
824 | SyncRes sr(dc->d_now); | |
0c43f455 | 825 | |
2e921ec6 | 826 | bool DNSSECOK=false; |
3457a2a0 | 827 | if(t_pdl) { |
f26bf547 | 828 | sr.setLuaEngine(t_pdl); |
3457a2a0 | 829 | } |
9eec8c98 | 830 | if(g_dnssecmode != DNSSECMode::Off) { |
30ee601a | 831 | sr.setDoDNSSEC(true); |
9eec8c98 PL |
832 | |
833 | // Does the requestor want DNSSEC records? | |
834 | if(edo.d_Z & EDNSOpts::DNSSECOK) { | |
835 | DNSSECOK=true; | |
836 | g_stats.dnssecQueries++; | |
837 | } | |
838 | } else { | |
839 | // Ignore the client-set CD flag | |
840 | pw.getHeader()->cd=0; | |
5b9853c9 | 841 | } |
0c43f455 RG |
842 | sr.setDNSSECValidationRequested(g_dnssecmode == DNSSECMode::ValidateAll || g_dnssecmode==DNSSECMode::ValidateForLog || ((dc->d_mdp.d_header.ad || DNSSECOK) && g_dnssecmode==DNSSECMode::Process)); |
843 | ||
4898a348 | 844 | #ifdef HAVE_PROTOBUF |
30ee601a | 845 | sr.setInitialRequestId(dc->d_uuid); |
4898a348 | 846 | #endif |
0c43f455 | 847 | |
2fe3354d | 848 | sr.setQuerySource(dc->d_remote, g_useIncomingECS && !dc->d_ednssubnet.source.empty() ? boost::optional<const EDNSSubnetOpts&>(dc->d_ednssubnet) : boost::none); |
57769f13 | 849 | |
904d3219 PD |
850 | bool tracedQuery=false; // we could consider letting Lua know about this too |
851 | bool variableAnswer = false; | |
9fc36e90 | 852 | bool shouldNotValidate = false; |
904d3219 | 853 | |
ef3b6cd7 RG |
854 | /* preresolve expects res (dq.rcode) to be set to RCode::NoError by default */ |
855 | int res = RCode::NoError; | |
1f1ca368 | 856 | DNSFilterEngine::Policy appliedPolicy; |
39ec5d29 | 857 | DNSRecord spoofed; |
5cc8371b | 858 | RecursorLua4::DNSQuestion dq(dc->d_source, dc->d_destination, dc->d_mdp.d_qname, dc->d_mdp.d_qtype, dc->d_tcp, variableAnswer, wantsRPZ); |
6e505c5e RG |
859 | dq.ednsFlags = &edo.d_Z; |
860 | dq.ednsOptions = &dc->d_ednsOpts; | |
861 | dq.tag = dc->d_tag; | |
862 | dq.discardedPolicies = &sr.d_discardedPolicies; | |
863 | dq.policyTags = &dc->d_policyTags; | |
864 | dq.appliedPolicy = &appliedPolicy; | |
865 | dq.currentRecords = &ret; | |
866 | dq.dh = &dc->d_mdp.d_header; | |
05c74122 | 867 | dq.data = dc->d_data; |
67e31ebe RG |
868 | #ifdef HAVE_PROTOBUF |
869 | dq.requestorId = dc->d_requestorId; | |
590388d2 | 870 | dq.deviceId = dc->d_deviceId; |
67e31ebe | 871 | #endif |
ba21fcfe | 872 | |
e661a20b | 873 | if(dc->d_mdp.d_qtype==QType::ANY && !dc->d_tcp && g_anyToTcp) { |
56b4d21b PD |
874 | pw.getHeader()->tc = 1; |
875 | res = 0; | |
876 | variableAnswer = true; | |
e661a20b PD |
877 | goto sendit; |
878 | } | |
879 | ||
f26bf547 | 880 | if(t_traceRegex && t_traceRegex->match(dc->d_mdp.d_qname.toString())) { |
77499b05 BH |
881 | sr.setLogMode(SyncRes::Store); |
882 | tracedQuery=true; | |
883 | } | |
3ddb9247 | 884 | |
8f7473d7 | 885 | |
976ec823 | 886 | if(!g_quiet || tracedQuery) { |
461df9d2 | 887 | L<<Logger::Warning<<t_id<<" ["<<MT->getTid()<<"/"<<MT->numProcesses()<<"] " << (dc->d_tcp ? "TCP " : "") << "question for '"<<dc->d_mdp.d_qname<<"|" |
976ec823 | 888 | <<DNSRecordContent::NumberToType(dc->d_mdp.d_qtype)<<"' from "<<dc->getRemote(); |
b40562da RG |
889 | if(!dc->d_ednssubnet.source.empty()) { |
890 | L<<" (ecs "<<dc->d_ednssubnet.source.toString()<<")"; | |
6e986f5e | 891 | } |
976ec823 | 892 | L<<endl; |
893 | } | |
c75a6a9e | 894 | |
fededf47 | 895 | sr.setId(MT->getTid()); |
67828389 | 896 | if(!dc->d_mdp.d_header.rd) |
c836dc19 BH |
897 | sr.setCacheOnly(); |
898 | ||
f26bf547 RG |
899 | if (t_pdl) { |
900 | t_pdl->prerpz(dq, res); | |
0a273054 RG |
901 | } |
902 | ||
db486de5 | 903 | // Check if the query has a policy attached to it |
0a273054 | 904 | if (wantsRPZ) { |
5cc8371b | 905 | appliedPolicy = luaconfsLocal->dfe.getQueryPolicy(dc->d_mdp.d_qname, dc->d_source, sr.d_discardedPolicies); |
0a273054 | 906 | } |
644dd1da | 907 | |
54be222b | 908 | // if there is a RecursorLua active, and it 'took' the query in preResolve, we don't launch beginResolve |
f26bf547 | 909 | if(!t_pdl || !t_pdl->preresolve(dq, res)) { |
b8470add | 910 | |
30ee601a | 911 | sr.setWantsRPZ(wantsRPZ); |
b8470add PL |
912 | if(wantsRPZ) { |
913 | switch(appliedPolicy.d_kind) { | |
914 | case DNSFilterEngine::PolicyKind::NoAction: | |
915 | break; | |
916 | case DNSFilterEngine::PolicyKind::Drop: | |
917 | g_stats.policyDrops++; | |
7a25883a | 918 | g_stats.policyResults[appliedPolicy.d_kind]++; |
b8470add PL |
919 | delete dc; |
920 | dc=0; | |
921 | return; | |
922 | case DNSFilterEngine::PolicyKind::NXDOMAIN: | |
923 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
924 | res=RCode::NXDomain; | |
925 | goto haveAnswer; | |
926 | case DNSFilterEngine::PolicyKind::NODATA: | |
927 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
928 | res=RCode::NoError; | |
db486de5 | 929 | goto haveAnswer; |
b8470add PL |
930 | case DNSFilterEngine::PolicyKind::Custom: |
931 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
932 | res=RCode::NoError; | |
a9e029ee | 933 | spoofed=appliedPolicy.getCustomRecord(dc->d_mdp.d_qname); |
b8470add | 934 | ret.push_back(spoofed); |
53508135 | 935 | handleRPZCustom(spoofed, QType(dc->d_mdp.d_qtype), sr, res, ret); |
b8470add PL |
936 | goto haveAnswer; |
937 | case DNSFilterEngine::PolicyKind::Truncate: | |
938 | if(!dc->d_tcp) { | |
939 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
940 | res=RCode::NoError; | |
941 | pw.getHeader()->tc=1; | |
942 | goto haveAnswer; | |
943 | } | |
944 | break; | |
945 | } | |
db486de5 PL |
946 | } |
947 | ||
b8470add | 948 | // Query got not handled for QNAME Policy reasons, now actually go out to find an answer |
44971ca0 PD |
949 | try { |
950 | res = sr.beginResolve(dc->d_mdp.d_qname, QType(dc->d_mdp.d_qtype), dc->d_mdp.d_qclass, ret); | |
9fc36e90 | 951 | shouldNotValidate = sr.wasOutOfBand(); |
44971ca0 PD |
952 | } |
953 | catch(ImmediateServFailException &e) { | |
854d44e3 | 954 | if(g_logCommonErrors) |
955 | L<<Logger::Notice<<"Sending SERVFAIL to "<<dc->getRemote()<<" during resolve of '"<<dc->d_mdp.d_qname<<"' because: "<<e.reason<<endl; | |
44971ca0 PD |
956 | res = RCode::ServFail; |
957 | } | |
4485aa35 | 958 | |
1921a4c2 RG |
959 | dq.validationState = sr.getValidationState(); |
960 | ||
b8470add PL |
961 | // During lookup, an NSDNAME or NSIP trigger was hit in RPZ |
962 | if (res == -2) { // XXX This block should be macro'd, it is repeated post-resolve. | |
963 | appliedPolicy = sr.d_appliedPolicy; | |
964 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
965 | switch(appliedPolicy.d_kind) { | |
966 | case DNSFilterEngine::PolicyKind::NoAction: // This can never happen | |
967 | throw PDNSException("NoAction policy returned while a NSDNAME or NSIP trigger was hit"); | |
968 | case DNSFilterEngine::PolicyKind::Drop: | |
969 | g_stats.policyDrops++; | |
970 | delete dc; | |
971 | dc=0; | |
972 | return; | |
973 | case DNSFilterEngine::PolicyKind::NXDOMAIN: | |
974 | ret.clear(); | |
975 | res=RCode::NXDomain; | |
976 | goto haveAnswer; | |
977 | ||
978 | case DNSFilterEngine::PolicyKind::NODATA: | |
979 | ret.clear(); | |
980 | res=RCode::NoError; | |
981 | goto haveAnswer; | |
982 | ||
983 | case DNSFilterEngine::PolicyKind::Truncate: | |
984 | if(!dc->d_tcp) { | |
985 | ret.clear(); | |
986 | res=RCode::NoError; | |
987 | pw.getHeader()->tc=1; | |
988 | goto haveAnswer; | |
989 | } | |
990 | break; | |
991 | ||
992 | case DNSFilterEngine::PolicyKind::Custom: | |
993 | ret.clear(); | |
994 | res=RCode::NoError; | |
a9e029ee | 995 | spoofed=appliedPolicy.getCustomRecord(dc->d_mdp.d_qname); |
b8470add | 996 | ret.push_back(spoofed); |
53508135 | 997 | handleRPZCustom(spoofed, QType(dc->d_mdp.d_qtype), sr, res, ret); |
b8470add PL |
998 | goto haveAnswer; |
999 | } | |
1000 | } | |
1001 | ||
1002 | if (wantsRPZ) { | |
1f1ca368 | 1003 | appliedPolicy = luaconfsLocal->dfe.getPostPolicy(ret, sr.d_discardedPolicies); |
b8470add | 1004 | } |
db486de5 | 1005 | |
f26bf547 | 1006 | if(t_pdl) { |
db486de5 PL |
1007 | if(res == RCode::NoError) { |
1008 | auto i=ret.cbegin(); | |
1009 | for(; i!= ret.cend(); ++i) | |
1010 | if(i->d_type == dc->d_mdp.d_qtype && i->d_place == DNSResourceRecord::ANSWER) | |
1011 | break; | |
f26bf547 | 1012 | if(i == ret.cend() && t_pdl->nodata(dq, res)) |
3ca4e735 PL |
1013 | shouldNotValidate = true; |
1014 | ||
db486de5 | 1015 | } |
f26bf547 | 1016 | else if(res == RCode::NXDomain && t_pdl->nxdomain(dq, res)) |
3ca4e735 | 1017 | shouldNotValidate = true; |
db486de5 | 1018 | |
f26bf547 | 1019 | if(t_pdl->postresolve(dq, res)) |
3ca4e735 | 1020 | shouldNotValidate = true; |
db486de5 PL |
1021 | } |
1022 | ||
b8470add PL |
1023 | if (wantsRPZ) { //XXX This block is repeated, see above |
1024 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
1025 | switch(appliedPolicy.d_kind) { | |
1026 | case DNSFilterEngine::PolicyKind::NoAction: | |
1027 | break; | |
1028 | case DNSFilterEngine::PolicyKind::Drop: | |
1029 | g_stats.policyDrops++; | |
1030 | delete dc; | |
1031 | dc=0; | |
1032 | return; | |
1033 | case DNSFilterEngine::PolicyKind::NXDOMAIN: | |
1034 | ret.clear(); | |
1035 | res=RCode::NXDomain; | |
1036 | goto haveAnswer; | |
1037 | ||
1038 | case DNSFilterEngine::PolicyKind::NODATA: | |
1039 | ret.clear(); | |
1040 | res=RCode::NoError; | |
1041 | goto haveAnswer; | |
1042 | ||
1043 | case DNSFilterEngine::PolicyKind::Truncate: | |
1044 | if(!dc->d_tcp) { | |
1045 | ret.clear(); | |
1046 | res=RCode::NoError; | |
1047 | pw.getHeader()->tc=1; | |
1048 | goto haveAnswer; | |
1049 | } | |
1050 | break; | |
1051 | ||
1052 | case DNSFilterEngine::PolicyKind::Custom: | |
1053 | ret.clear(); | |
1054 | res=RCode::NoError; | |
a9e029ee | 1055 | spoofed=appliedPolicy.getCustomRecord(dc->d_mdp.d_qname); |
b8470add | 1056 | ret.push_back(spoofed); |
53508135 | 1057 | handleRPZCustom(spoofed, QType(dc->d_mdp.d_qtype), sr, res, ret); |
b8470add PL |
1058 | goto haveAnswer; |
1059 | } | |
644dd1da | 1060 | } |
4485aa35 | 1061 | } |
644dd1da | 1062 | haveAnswer:; |
3e8216c8 | 1063 | if(res == PolicyDecision::DROP) { |
e9c2ad3a | 1064 | g_stats.policyDrops++; |
ae7e77ad | 1065 | delete dc; |
1066 | dc=0; | |
1067 | return; | |
3ddb9247 | 1068 | } |
9cdfab64 | 1069 | if(tracedQuery || res == -1 || res == RCode::ServFail || pw.getHeader()->rcode == RCode::ServFail) |
1dc8f4d0 | 1070 | { |
85ffbc53 PD |
1071 | string trace(sr.getTrace()); |
1072 | if(!trace.empty()) { | |
1073 | vector<string> lines; | |
1074 | boost::split(lines, trace, boost::is_any_of("\n")); | |
1dc8f4d0 | 1075 | for(const string& line : lines) { |
85ffbc53 PD |
1076 | if(!line.empty()) |
1077 | L<<Logger::Warning<< line << endl; | |
1078 | } | |
1079 | } | |
1080 | } | |
3ddb9247 | 1081 | |
9cdfab64 | 1082 | if(res == -1) { |
0fe1d080 PD |
1083 | pw.getHeader()->rcode=RCode::ServFail; |
1084 | // no commit here, because no record | |
1085 | g_stats.servFails++; | |
1086 | } | |
288f4aa9 | 1087 | else { |
ea634573 | 1088 | pw.getHeader()->rcode=res; |
92011b8f | 1089 | |
f3fe4ae6 | 1090 | // Does the validation mode or query demand validation? |
0c43f455 | 1091 | if(!shouldNotValidate && sr.isDNSSECValidationRequested()) { |
b25cae9a | 1092 | try { |
f3fe4ae6 | 1093 | if(sr.doLog()) { |
5cc8371b | 1094 | L<<Logger::Warning<<"Starting validation of answer to "<<dc->d_mdp.d_qname<<"|"<<QType(dc->d_mdp.d_qtype).getName()<<" for "<<dc->getRemote()<<endl; |
2e921ec6 | 1095 | } |
4d2be65d RG |
1096 | |
1097 | auto state = sr.getValidationState(); | |
1098 | ||
b25cae9a | 1099 | if(state == Secure) { |
2e921ec6 | 1100 | if(sr.doLog()) { |
5cc8371b | 1101 | L<<Logger::Warning<<"Answer to "<<dc->d_mdp.d_qname<<"|"<<QType(dc->d_mdp.d_qtype).getName()<<" for "<<dc->getRemote()<<" validates correctly"<<endl; |
2e921ec6 | 1102 | } |
b25cae9a | 1103 | |
1104 | // Is the query source interested in the value of the ad-bit? | |
885c8881 | 1105 | if (dc->d_mdp.d_header.ad || DNSSECOK) |
b25cae9a | 1106 | pw.getHeader()->ad=1; |
1107 | } | |
1108 | else if(state == Insecure) { | |
f3fe4ae6 | 1109 | if(sr.doLog()) { |
5cc8371b | 1110 | L<<Logger::Warning<<"Answer to "<<dc->d_mdp.d_qname<<"|"<<QType(dc->d_mdp.d_qtype).getName()<<" for "<<dc->getRemote()<<" validates as Insecure"<<endl; |
12ce523e | 1111 | } |
b25cae9a | 1112 | |
1113 | pw.getHeader()->ad=0; | |
f3fe4ae6 | 1114 | } |
b25cae9a | 1115 | else if(state == Bogus) { |
c87e1876 | 1116 | if(g_dnssecLogBogus || sr.doLog() || g_dnssecmode == DNSSECMode::ValidateForLog) { |
5cc8371b | 1117 | L<<Logger::Warning<<"Answer to "<<dc->d_mdp.d_qname<<"|"<<QType(dc->d_mdp.d_qtype).getName()<<" for "<<dc->getRemote()<<" validates as Bogus"<<endl; |
b25cae9a | 1118 | } |
1119 | ||
1120 | // Does the query or validation mode sending out a SERVFAIL on validation errors? | |
885c8881 | 1121 | if(!pw.getHeader()->cd && (g_dnssecmode == DNSSECMode::ValidateAll || dc->d_mdp.d_header.ad || DNSSECOK)) { |
b25cae9a | 1122 | if(sr.doLog()) { |
5fc44cd2 | 1123 | 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 | 1124 | } |
1125 | ||
1126 | pw.getHeader()->rcode=RCode::ServFail; | |
1127 | goto sendit; | |
1128 | } else { | |
1129 | if(sr.doLog()) { | |
5fc44cd2 | 1130 | 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 | 1131 | } |
1132 | } | |
1133 | } | |
1134 | } | |
1135 | catch(ImmediateServFailException &e) { | |
1136 | if(g_logCommonErrors) | |
5fc44cd2 | 1137 | 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 | 1138 | pw.getHeader()->rcode=RCode::ServFail; |
1139 | goto sendit; | |
f3fe4ae6 | 1140 | } |
b3f0ed10 | 1141 | } |
1142 | ||
c154c8a4 | 1143 | if(ret.size()) { |
92476c8b | 1144 | orderAndShuffle(ret); |
5cc8371b | 1145 | if(auto sl = luaconfsLocal->sortlist.getOrderCmp(dc->d_source)) { |
20d84f77 | 1146 | stable_sort(ret.begin(), ret.end(), *sl); |
3e61e7f7 | 1147 | variableAnswer=true; |
1148 | } | |
8e079f3a | 1149 | } |
0afa32d4 RG |
1150 | |
1151 | bool needCommit = false; | |
8e079f3a | 1152 | for(auto i=ret.cbegin(); i!=ret.cend(); ++i) { |
3e80ebce KM |
1153 | if( ! DNSSECOK && |
1154 | ( i->d_type == QType::NSEC3 || | |
1155 | ( | |
1156 | ( i->d_type == QType::RRSIG || i->d_type==QType::NSEC ) && | |
1157 | ( | |
1158 | ( dc->d_mdp.d_qtype != i->d_type && dc->d_mdp.d_qtype != QType::ANY ) || | |
1159 | i->d_place != DNSResourceRecord::ANSWER | |
1160 | ) | |
1161 | ) | |
1162 | ) | |
1163 | ) { | |
2e921ec6 | 1164 | continue; |
3e80ebce KM |
1165 | } |
1166 | ||
97c6d7e5 RG |
1167 | if (!addRecordToPacket(pw, *i, minTTL, maxanswersize)) { |
1168 | needCommit = false; | |
1169 | break; | |
1170 | } | |
1171 | needCommit = true; | |
1172 | ||
aa7929a3 | 1173 | #ifdef HAVE_PROTOBUF |
d9d3f9c1 RG |
1174 | if(luaconfsLocal->protobufServer && (i->d_type == QType::A || i->d_type == QType::AAAA || i->d_type == QType::CNAME)) { |
1175 | pbMessage.addRR(*i); | |
aa7929a3 RG |
1176 | } |
1177 | #endif | |
ea634573 | 1178 | } |
0afa32d4 | 1179 | if(needCommit) |
8e079f3a | 1180 | pw.commit(); |
288f4aa9 | 1181 | } |
10321a98 | 1182 | sendit:; |
b3f0ed10 | 1183 | |
97c6d7e5 RG |
1184 | if (haveEDNS) { |
1185 | /* we try to add the EDNS OPT RR even for truncated answers, | |
1186 | as rfc6891 states: | |
1187 | "The minimal response MUST be the DNS header, question section, and an | |
1188 | OPT record. This MUST also occur when a truncated response (using | |
1189 | the DNS header's TC bit) is returned." | |
1190 | */ | |
1191 | if (addRecordToPacket(pw, makeOpt(edo.d_packetsize, 0, edo.d_Z), minTTL, maxanswersize)) { | |
1192 | pw.commit(); | |
1193 | } | |
1194 | } | |
1195 | ||
79332bff | 1196 | g_rs.submitResponse(dc->d_mdp.d_qtype, packet.size(), !dc->d_tcp); |
5cc8371b | 1197 | updateResponseStats(res, dc->d_source, packet.size(), &dc->d_mdp.d_qname, dc->d_mdp.d_qtype); |
aa7929a3 | 1198 | #ifdef HAVE_PROTOBUF |
b790ef3d | 1199 | if (luaconfsLocal->protobufServer && (!luaconfsLocal->protobufTaggedOnly || (appliedPolicy.d_name && !appliedPolicy.d_name->empty()) || !dc->d_policyTags.empty())) { |
d9d3f9c1 RG |
1200 | pbMessage.setBytes(packet.size()); |
1201 | pbMessage.setResponseCode(pw.getHeader()->rcode); | |
0a273054 RG |
1202 | if (appliedPolicy.d_name) { |
1203 | pbMessage.setAppliedPolicy(*appliedPolicy.d_name); | |
f3da83fe | 1204 | pbMessage.setAppliedPolicyType(appliedPolicy.d_type); |
0a273054 | 1205 | } |
d9d3f9c1 | 1206 | pbMessage.setPolicyTags(dc->d_policyTags); |
58307a85 | 1207 | pbMessage.setQueryTime(dc->d_now.tv_sec, dc->d_now.tv_usec); |
67e31ebe | 1208 | pbMessage.setRequestorId(dq.requestorId); |
590388d2 | 1209 | pbMessage.setDeviceId(dq.deviceId); |
02b47f43 | 1210 | protobufLogResponse(luaconfsLocal->protobufServer, pbMessage); |
aa7929a3 RG |
1211 | } |
1212 | #endif | |
ea634573 | 1213 | if(!dc->d_tcp) { |
b71b60ee | 1214 | struct msghdr msgh; |
1215 | struct iovec iov; | |
1216 | char cbuf[256]; | |
1217 | fillMSGHdr(&msgh, &iov, cbuf, 0, (char*)&*packet.begin(), packet.size(), &dc->d_remote); | |
2c0af54f PD |
1218 | msgh.msg_control=NULL; |
1219 | ||
cbc03320 | 1220 | if(g_fromtosockets.count(dc->d_socket)) { |
fbe2a2e0 | 1221 | addCMsgSrcAddr(&msgh, cbuf, &dc->d_local, 0); |
2c0af54f | 1222 | } |
cbc03320 | 1223 | if(sendmsg(dc->d_socket, &msgh, 0) < 0 && g_logCommonErrors) |
5cc8371b | 1224 | L<<Logger::Warning<<"Sending UDP reply to client "<<dc->getRemote()<<" failed with: "<<strerror(errno)<<endl; |
3762e821 | 1225 | if(!SyncRes::s_nopacketcache && !variableAnswer && !sr.wasVariable() ) { |
e9f63d47 | 1226 | 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 | 1227 | string((const char*)&*packet.begin(), packet.size()), |
3ddb9247 | 1228 | g_now.tv_sec, |
76e2b9e3 | 1229 | pw.getHeader()->rcode == RCode::ServFail ? SyncRes::s_packetcacheservfailttl : |
d9d3f9c1 RG |
1230 | min(minTTL,SyncRes::s_packetcachettl), |
1231 | &pbMessage); | |
1051f8a9 | 1232 | } |
3762e821 | 1233 | // else cerr<<"Not putting in packet cache: "<<sr.wasVariable()<<endl; |
feccc9fc | 1234 | } |
9c495589 BH |
1235 | else { |
1236 | char buf[2]; | |
ea634573 BH |
1237 | buf[0]=packet.size()/256; |
1238 | buf[1]=packet.size()%256; | |
feccc9fc | 1239 | |
c038218b | 1240 | Utility::iovec iov[2]; |
feccc9fc | 1241 | |
ea634573 BH |
1242 | iov[0].iov_base=(void*)buf; iov[0].iov_len=2; |
1243 | iov[1].iov_base=(void*)&*packet.begin(); iov[1].iov_len = packet.size(); | |
feccc9fc | 1244 | |
dd079764 | 1245 | int wret=Utility::writev(dc->d_socket, iov, 2); |
0e9d9ce2 | 1246 | bool hadError=true; |
feccc9fc | 1247 | |
dd079764 | 1248 | if(wret == 0) |
18af64a8 | 1249 | L<<Logger::Error<<"EOF writing TCP answer to "<<dc->getRemote()<<endl; |
dd079764 | 1250 | else if(wret < 0 ) |
18af64a8 | 1251 | L<<Logger::Error<<"Error writing TCP answer to "<<dc->getRemote()<<": "<< strerror(errno) <<endl; |
dd079764 RG |
1252 | else if((unsigned int)wret != 2 + packet.size()) |
1253 | L<<Logger::Error<<"Oops, partial answer sent to "<<dc->getRemote()<<" for "<<dc->d_mdp.d_qname<<" (size="<< (2 + packet.size()) <<", sent "<<wret<<")"<<endl; | |
0e9d9ce2 | 1254 | else |
18af64a8 | 1255 | hadError=false; |
3ddb9247 | 1256 | |
09e6702a | 1257 | // update tcp connection status, either by closing or moving to 'BYTE0' |
3ddb9247 | 1258 | |
09e6702a | 1259 | if(hadError) { |
18af64a8 | 1260 | // no need to remove us from FDM, we weren't there |
c36bc97a | 1261 | dc->d_socket = -1; |
09e6702a | 1262 | } |
a6ae6414 | 1263 | else { |
fde296a3 RG |
1264 | dc->d_tcpConnection->queriesCount++; |
1265 | if (g_tcpMaxQueriesPerConn && dc->d_tcpConnection->queriesCount >= g_tcpMaxQueriesPerConn) { | |
1266 | dc->d_socket = -1; | |
1267 | } | |
1268 | else { | |
1269 | dc->d_tcpConnection->state=TCPConnection::BYTE0; | |
1270 | Utility::gettimeofday(&g_now, 0); // needs to be updated | |
1271 | t_fdm->addReadFD(dc->d_socket, handleRunningTCPQuestion, dc->d_tcpConnection); | |
1272 | t_fdm->setReadTTD(dc->d_socket, g_now, g_tcpTimeout); | |
1273 | } | |
0e9d9ce2 | 1274 | } |
9c495589 | 1275 | } |
2c9119cd | 1276 | float spent=makeFloat(sr.getNow()-dc->d_now); |
1d5b3ce6 | 1277 | if(!g_quiet) { |
461df9d2 | 1278 | 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 | 1279 | L<<"': "<<ntohs(pw.getHeader()->ancount)<<" answers, "<<ntohs(pw.getHeader()->arcount)<<" additional, took "<<sr.d_outqueries<<" packets, "<< |
2c9119cd | 1280 | sr.d_totUsec/1000.0<<" netw ms, "<< spent*1000.0<<" tot ms, "<< |
1281 | sr.d_throttledqueries<<" throttled, "<<sr.d_timeouts<<" timeouts, "<<sr.d_tcpoutqueries<<" tcp connections, rcode="<< res; | |
1282 | ||
1283 | if(!shouldNotValidate && sr.isDNSSECValidationRequested()) { | |
1284 | L<< ", dnssec="<<vStates[sr.getValidationState()]; | |
1285 | } | |
1286 | ||
1287 | L<<endl; | |
1288 | ||
c75a6a9e | 1289 | } |
b23b8614 | 1290 | |
3ddb9247 | 1291 | sr.d_outqueries ? t_RC->cacheMisses++ : t_RC->cacheHits++; |
2c9119cd | 1292 | |
fe213470 BH |
1293 | if(spent < 0.001) |
1294 | g_stats.answers0_1++; | |
1295 | else if(spent < 0.010) | |
1296 | g_stats.answers1_10++; | |
1297 | else if(spent < 0.1) | |
1298 | g_stats.answers10_100++; | |
1299 | else if(spent < 1.0) | |
1300 | g_stats.answers100_1000++; | |
1301 | else | |
1302 | g_stats.answersSlow++; | |
1303 | ||
574af7ea | 1304 | uint64_t newLat=(uint64_t)(spent*1000000); |
b841314c | 1305 | newLat = min(newLat,(uint64_t)(((uint64_t) g_networkTimeoutMsec)*1000)); // outliers of several minutes exist.. |
08f3f638 | 1306 | g_stats.avgLatencyUsec=(1-1.0/g_latencyStatSize)*g_stats.avgLatencyUsec + (float)newLat/g_latencyStatSize; |
0a6b1027 | 1307 | // no worries, we do this for packet cache hits elsewhere |
19178da9 | 1308 | |
1309 | auto ourtime = 1000.0*spent-sr.d_totUsec/1000.0; // in msec | |
1310 | if(ourtime < 1) | |
1311 | g_stats.ourtime0_1++; | |
1312 | else if(ourtime < 2) | |
1313 | g_stats.ourtime1_2++; | |
1314 | else if(ourtime < 4) | |
1315 | g_stats.ourtime2_4++; | |
1316 | else if(ourtime < 8) | |
1317 | g_stats.ourtime4_8++; | |
1318 | else if(ourtime < 16) | |
1319 | g_stats.ourtime8_16++; | |
1320 | else if(ourtime < 32) | |
1321 | g_stats.ourtime16_32++; | |
1322 | else { | |
1323 | // cerr<<"SLOW: "<<ourtime<<"ms -> "<<dc->d_mdp.d_qname<<"|"<<DNSRecordContent::NumberToType(dc->d_mdp.d_qtype)<<endl; | |
1324 | g_stats.ourtimeSlow++; | |
1325 | } | |
042da1a1 | 1326 | if(ourtime >= 0.0) { |
1327 | newLat=ourtime*1000; // usec | |
1328 | g_stats.avgLatencyOursUsec=(1-1.0/g_latencyStatSize)*g_stats.avgLatencyOursUsec + (float)newLat/g_latencyStatSize; | |
1329 | } | |
c6d04bdc | 1330 | // cout<<dc->d_mdp.d_qname<<"\t"<<MT->getUsec()<<"\t"<<sr.d_outqueries<<endl; |
ea634573 | 1331 | delete dc; |
c36bc97a | 1332 | dc=0; |
288f4aa9 | 1333 | } |
3f81d239 | 1334 | catch(PDNSException &ae) { |
a903b39c | 1335 | L<<Logger::Error<<"startDoResolve problem "<<makeLoginfo(dc)<<": "<<ae.reason<<endl; |
c36bc97a | 1336 | delete dc; |
288f4aa9 | 1337 | } |
7b1469bb | 1338 | catch(MOADNSException& e) { |
a903b39c | 1339 | L<<Logger::Error<<"DNS parser error "<<makeLoginfo(dc) <<": "<<dc->d_mdp.d_qname<<", "<<e.what()<<endl; |
c36bc97a | 1340 | delete dc; |
7b1469bb | 1341 | } |
fdbf35ac | 1342 | catch(std::exception& e) { |
068c7634 PD |
1343 | L<<Logger::Error<<"STL error "<< makeLoginfo(dc)<<": "<<e.what(); |
1344 | ||
1345 | // Luawrapper nests the exception from Lua, so we unnest it here | |
1346 | try { | |
1347 | std::rethrow_if_nested(e); | |
2010ac95 RG |
1348 | } catch(const std::exception& ne) { |
1349 | L<<". Extra info: "<<ne.what(); | |
068c7634 PD |
1350 | } catch(...) {} |
1351 | ||
1352 | L<<endl; | |
c36bc97a | 1353 | delete dc; |
c154c8a4 | 1354 | } |
288f4aa9 | 1355 | catch(...) { |
a903b39c | 1356 | L<<Logger::Error<<"Any other exception in a resolver context "<< makeLoginfo(dc) <<endl; |
288f4aa9 | 1357 | } |
3ddb9247 | 1358 | |
ec6eacbc | 1359 | g_stats.maxMThreadStackUsage = max(MT->getMaxStackUsage(), g_stats.maxMThreadStackUsage); |
288f4aa9 BH |
1360 | } |
1361 | ||
d187038c | 1362 | static void makeControlChannelSocket(int processNum=-1) |
1d5b3ce6 | 1363 | { |
2d733c0f | 1364 | string sockname=::arg()["socket-dir"]+"/"+s_programname; |
677e2a46 | 1365 | if(processNum >= 0) |
335da0ba | 1366 | sockname += "."+std::to_string(processNum); |
677e2a46 | 1367 | sockname+=".controlsocket"; |
41f7a068 | 1368 | s_rcc.listen(sockname); |
3ddb9247 | 1369 | |
387de317 BH |
1370 | int sockowner = -1; |
1371 | int sockgroup = -1; | |
1372 | ||
1373 | if (!::arg().isEmpty("socket-group")) | |
1374 | sockgroup=::arg().asGid("socket-group"); | |
1375 | if (!::arg().isEmpty("socket-owner")) | |
1376 | sockowner=::arg().asUid("socket-owner"); | |
3ddb9247 | 1377 | |
f838ad8d BH |
1378 | if (sockgroup > -1 || sockowner > -1) { |
1379 | if(chown(sockname.c_str(), sockowner, sockgroup) < 0) { | |
1380 | unixDie("Failed to chown control socket"); | |
1381 | } | |
1382 | } | |
387de317 BH |
1383 | |
1384 | // do mode change if socket-mode is given | |
1385 | if(!::arg().isEmpty("socket-mode")) { | |
1386 | mode_t sockmode=::arg().asMode("socket-mode"); | |
34c513f9 RG |
1387 | if(chmod(sockname.c_str(), sockmode) < 0) { |
1388 | unixDie("Failed to chmod control socket"); | |
1389 | } | |
387de317 | 1390 | } |
1d5b3ce6 BH |
1391 | } |
1392 | ||
5cc8371b RG |
1393 | static void getQNameAndSubnet(const std::string& question, DNSName* dnsname, uint16_t* qtype, uint16_t* qclass, |
1394 | bool& foundECS, EDNSSubnetOpts* ednssubnet, std::map<uint16_t, EDNSOptionView>* options, | |
1395 | bool& foundXPF, ComboAddress* xpfSource, ComboAddress* xpfDest) | |
02b47f43 | 1396 | { |
59cb4a79 | 1397 | const bool lookForXPF = xpfSource != nullptr && g_xpfRRCode != 0; |
5cc8371b RG |
1398 | const bool lookForECS = ednssubnet != nullptr; |
1399 | const struct dnsheader* dh = reinterpret_cast<const struct dnsheader*>(question.c_str()); | |
02b47f43 RG |
1400 | size_t questionLen = question.length(); |
1401 | unsigned int consumed=0; | |
1402 | *dnsname=DNSName(question.c_str(), questionLen, sizeof(dnsheader), false, qtype, qclass, &consumed); | |
1403 | ||
1404 | size_t pos= sizeof(dnsheader)+consumed+4; | |
5cc8371b RG |
1405 | const size_t headerSize = /* root */ 1 + sizeof(dnsrecordheader); |
1406 | const uint16_t arcount = ntohs(dh->arcount); | |
1407 | ||
1408 | for (uint16_t arpos = 0; arpos < arcount && questionLen > (pos + headerSize) && ((lookForECS && !foundECS) || (lookForXPF && !foundXPF)); arpos++) { | |
1409 | if (question.at(pos) != 0) { | |
1410 | /* not an OPT or a XPF, bye. */ | |
1411 | return; | |
1412 | } | |
1413 | ||
1414 | pos += 1; | |
1415 | const dnsrecordheader* drh = reinterpret_cast<const dnsrecordheader*>(&question.at(pos)); | |
1416 | pos += sizeof(dnsrecordheader); | |
1417 | ||
1418 | if (pos >= questionLen) { | |
1419 | return; | |
1420 | } | |
1421 | ||
02b47f43 | 1422 | /* OPT root label (1) followed by type (2) */ |
5cc8371b | 1423 | if(lookForECS && ntohs(drh->d_type) == QType::OPT) { |
00b8cadc RG |
1424 | if (!options) { |
1425 | char* ecsStart = nullptr; | |
1426 | size_t ecsLen = 0; | |
5cc8371b RG |
1427 | /* we need to pass the record len */ |
1428 | int res = getEDNSOption(const_cast<char*>(reinterpret_cast<const char*>(&question.at(pos - sizeof(drh->d_clen)))), questionLen - pos + sizeof(drh->d_clen), EDNSOptionCode::ECS, &ecsStart, &ecsLen); | |
00b8cadc RG |
1429 | if (res == 0 && ecsLen > 4) { |
1430 | EDNSSubnetOpts eso; | |
1431 | if(getEDNSSubnetOptsFromString(ecsStart + 4, ecsLen - 4, &eso)) { | |
1432 | *ednssubnet=eso; | |
5cc8371b | 1433 | foundECS = true; |
00b8cadc RG |
1434 | } |
1435 | } | |
1436 | } | |
1437 | else { | |
5cc8371b RG |
1438 | /* we need to pass the record len */ |
1439 | int res = getEDNSOptions(reinterpret_cast<const char*>(&question.at(pos -sizeof(drh->d_clen))), questionLen - pos + (sizeof(drh->d_clen)), *options); | |
00b8cadc RG |
1440 | if (res == 0) { |
1441 | const auto& it = options->find(EDNSOptionCode::ECS); | |
1442 | if (it != options->end() && it->second.content != nullptr && it->second.size > 0) { | |
1443 | EDNSSubnetOpts eso; | |
1444 | if(getEDNSSubnetOptsFromString(it->second.content, it->second.size, &eso)) { | |
1445 | *ednssubnet=eso; | |
5cc8371b | 1446 | foundECS = true; |
00b8cadc RG |
1447 | } |
1448 | } | |
02b47f43 RG |
1449 | } |
1450 | } | |
1451 | } | |
59cb4a79 | 1452 | else if (lookForXPF && ntohs(drh->d_type) == g_xpfRRCode && ntohs(drh->d_class) == QClass::IN && drh->d_ttl == 0) { |
5cc8371b RG |
1453 | if ((questionLen - pos) < ntohs(drh->d_clen)) { |
1454 | return; | |
1455 | } | |
1456 | ||
1457 | foundXPF = parseXPFPayload(reinterpret_cast<const char*>(&question.at(pos)), ntohs(drh->d_clen), *xpfSource, xpfDest); | |
1458 | } | |
1459 | ||
1460 | pos += ntohs(drh->d_clen); | |
02b47f43 RG |
1461 | } |
1462 | } | |
1463 | ||
d187038c | 1464 | static void handleRunningTCPQuestion(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 1465 | { |
cd989c87 | 1466 | shared_ptr<TCPConnection> conn=any_cast<shared_ptr<TCPConnection> >(var); |
c038218b | 1467 | |
879b3f70 | 1468 | if(conn->state==TCPConnection::BYTE0) { |
b841314c | 1469 | ssize_t bytes=recv(conn->getFD(), conn->data, 2, 0); |
09e6702a | 1470 | if(bytes==1) |
667f7e60 | 1471 | conn->state=TCPConnection::BYTE1; |
3ddb9247 | 1472 | if(bytes==2) { |
a0aa4f64 | 1473 | conn->qlen=(((unsigned char)conn->data[0]) << 8)+ (unsigned char)conn->data[1]; |
667f7e60 BH |
1474 | conn->bytesread=0; |
1475 | conn->state=TCPConnection::GETQUESTION; | |
09e6702a BH |
1476 | } |
1477 | if(!bytes || bytes < 0) { | |
bb4bdbaf | 1478 | t_fdm->removeReadFD(fd); |
09e6702a BH |
1479 | return; |
1480 | } | |
1481 | } | |
667f7e60 | 1482 | else if(conn->state==TCPConnection::BYTE1) { |
b841314c | 1483 | ssize_t bytes=recv(conn->getFD(), conn->data+1, 1, 0); |
09e6702a | 1484 | if(bytes==1) { |
667f7e60 | 1485 | conn->state=TCPConnection::GETQUESTION; |
a0aa4f64 | 1486 | conn->qlen=(((unsigned char)conn->data[0]) << 8)+ (unsigned char)conn->data[1]; |
667f7e60 | 1487 | conn->bytesread=0; |
09e6702a BH |
1488 | } |
1489 | if(!bytes || bytes < 0) { | |
1490 | if(g_logCommonErrors) | |
5cc8371b | 1491 | L<<Logger::Error<<"TCP client "<< conn->d_remote.toStringWithPort() <<" disconnected after first byte"<<endl; |
bb4bdbaf | 1492 | t_fdm->removeReadFD(fd); |
09e6702a BH |
1493 | return; |
1494 | } | |
1495 | } | |
667f7e60 | 1496 | else if(conn->state==TCPConnection::GETQUESTION) { |
b841314c | 1497 | ssize_t bytes=recv(conn->getFD(), conn->data + conn->bytesread, conn->qlen - conn->bytesread, 0); |
f9d67b41 | 1498 | if(!bytes || bytes < 0 || bytes > std::numeric_limits<std::uint16_t>::max()) { |
5cc8371b | 1499 | L<<Logger::Error<<"TCP client "<< conn->d_remote.toStringWithPort() <<" disconnected while reading question body"<<endl; |
bb4bdbaf | 1500 | t_fdm->removeReadFD(fd); |
09e6702a BH |
1501 | return; |
1502 | } | |
b841314c | 1503 | conn->bytesread+=(uint16_t)bytes; |
667f7e60 | 1504 | if(conn->bytesread==conn->qlen) { |
bb4bdbaf | 1505 | t_fdm->removeReadFD(fd); // should no longer awake ourselves when there is data to read |
879b3f70 | 1506 | |
f26bf547 | 1507 | DNSComboWriter* dc=nullptr; |
09e6702a | 1508 | try { |
cd989c87 | 1509 | dc=new DNSComboWriter(conn->data, conn->qlen, g_now); |
09e6702a BH |
1510 | } |
1511 | catch(MOADNSException &mde) { | |
3ddb9247 | 1512 | g_stats.clientParseError++; |
4957a608 | 1513 | if(g_logCommonErrors) |
5cc8371b | 1514 | L<<Logger::Error<<"Unable to parse packet from TCP client "<< conn->d_remote.toStringWithPort() <<endl; |
4957a608 | 1515 | return; |
09e6702a | 1516 | } |
cd989c87 BH |
1517 | dc->d_tcpConnection = conn; // carry the torch |
1518 | dc->setSocket(conn->getFD()); // this is the only time a copy is made of the actual fd | |
09e6702a | 1519 | dc->d_tcp=true; |
5cc8371b RG |
1520 | dc->setRemote(conn->d_remote); |
1521 | dc->setSource(conn->d_remote); | |
a6147cd2 | 1522 | ComboAddress dest; |
1523 | memset(&dest, 0, sizeof(dest)); | |
1524 | dest.sin4.sin_family = conn->d_remote.sin4.sin_family; | |
1525 | socklen_t len = dest.getSocklen(); | |
1526 | getsockname(conn->getFD(), (sockaddr*)&dest, &len); // if this fails, we're ok with it | |
1527 | dc->setLocal(dest); | |
5cc8371b | 1528 | dc->setDestination(dest); |
33dcceba RG |
1529 | DNSName qname; |
1530 | uint16_t qtype=0; | |
1531 | uint16_t qclass=0; | |
1532 | bool needECS = false; | |
5cc8371b | 1533 | bool needXPF = g_XPFAcl.match(conn->d_remote); |
67e31ebe | 1534 | string requestorId; |
590388d2 | 1535 | string deviceId; |
aa7929a3 | 1536 | #ifdef HAVE_PROTOBUF |
02b47f43 | 1537 | auto luaconfsLocal = g_luaconfs.getLocal(); |
33dcceba RG |
1538 | if (luaconfsLocal->protobufServer) { |
1539 | needECS = true; | |
1540 | } | |
1541 | #endif | |
1542 | ||
5cc8371b | 1543 | if(needECS || needXPF || (t_pdl && t_pdl->d_gettag)) { |
33dcceba RG |
1544 | |
1545 | try { | |
00b8cadc | 1546 | std::map<uint16_t, EDNSOptionView> ednsOptions; |
5cc8371b | 1547 | bool xpfFound = false; |
b40562da | 1548 | dc->d_ecsParsed = true; |
5cc8371b RG |
1549 | dc->d_ecsFound = false; |
1550 | getQNameAndSubnet(std::string(conn->data, conn->qlen), &qname, &qtype, &qclass, | |
1551 | dc->d_ecsFound, &dc->d_ednssubnet, g_gettagNeedsEDNSOptions ? &ednsOptions : nullptr, | |
1552 | xpfFound, needXPF ? &dc->d_source : nullptr, needXPF ? &dc->d_destination : nullptr); | |
02b47f43 | 1553 | |
f26bf547 | 1554 | if(t_pdl && t_pdl->d_gettag) { |
33dcceba | 1555 | try { |
5cc8371b | 1556 | dc->d_tag = t_pdl->gettag(dc->d_source, dc->d_ednssubnet.source, dc->d_destination, qname, qtype, &dc->d_policyTags, dc->d_data, ednsOptions, true, requestorId, deviceId); |
33dcceba RG |
1557 | } |
1558 | catch(std::exception& e) { | |
1559 | if(g_logCommonErrors) | |
1560 | L<<Logger::Warning<<"Error parsing a query packet qname='"<<qname<<"' for tag determination, setting tag=0: "<<e.what()<<endl; | |
1561 | } | |
1562 | } | |
1563 | } | |
1564 | catch(std::exception& e) | |
1565 | { | |
1566 | if(g_logCommonErrors) | |
1567 | L<<Logger::Warning<<"Error parsing a query packet for tag determination, setting tag=0: "<<e.what()<<endl; | |
1568 | } | |
1569 | } | |
1570 | #ifdef HAVE_PROTOBUF | |
4898a348 | 1571 | if(luaconfsLocal->protobufServer || luaconfsLocal->outgoingProtobufServer) { |
67e31ebe | 1572 | dc->d_requestorId = requestorId; |
590388d2 | 1573 | dc->d_deviceId = deviceId; |
02b47f43 | 1574 | dc->d_uuid = (*t_uuidGenerator)(); |
4898a348 | 1575 | } |
02b47f43 | 1576 | |
4898a348 | 1577 | if(luaconfsLocal->protobufServer) { |
02b47f43 | 1578 | try { |
02b47f43 | 1579 | const struct dnsheader* dh = (const struct dnsheader*) conn->data; |
02b47f43 | 1580 | |
b790ef3d | 1581 | if (!luaconfsLocal->protobufTaggedOnly) { |
5cc8371b | 1582 | protobufLogQuery(luaconfsLocal->protobufServer, luaconfsLocal->protobufMaskV4, luaconfsLocal->protobufMaskV6, dc->d_uuid, dc->d_source, dc->d_destination, dc->d_ednssubnet.source, true, dh->id, conn->qlen, qname, qtype, qclass, dc->d_policyTags, dc->d_requestorId, dc->d_deviceId); |
b790ef3d | 1583 | } |
02b47f43 RG |
1584 | } |
1585 | catch(std::exception& e) { | |
1586 | if(g_logCommonErrors) | |
1587 | L<<Logger::Warning<<"Error parsing a TCP query packet for edns subnet: "<<e.what()<<endl; | |
1588 | } | |
1589 | } | |
aa7929a3 | 1590 | #endif |
879b3f70 | 1591 | if(dc->d_mdp.d_header.qr) { |
4957a608 | 1592 | delete dc; |
048f5db6 | 1593 | g_stats.ignoredCount++; |
5cc8371b | 1594 | L<<Logger::Error<<"Ignoring answer from TCP client "<< dc->getRemote() <<" on server socket!"<<endl; |
4957a608 | 1595 | return; |
879b3f70 | 1596 | } |
3abcdab2 PD |
1597 | if(dc->d_mdp.d_header.opcode) { |
1598 | delete dc; | |
048f5db6 | 1599 | g_stats.ignoredCount++; |
5cc8371b | 1600 | L<<Logger::Error<<"Ignoring non-query opcode from TCP client "<< dc->getRemote() <<" on server socket!"<<endl; |
3abcdab2 PD |
1601 | return; |
1602 | } | |
09e6702a | 1603 | else { |
4957a608 BH |
1604 | ++g_stats.qcounter; |
1605 | ++g_stats.tcpqcounter; | |
50a5ef72 | 1606 | MT->makeThread(startDoResolve, dc); // deletes dc, will set state to BYTE0 again |
4957a608 | 1607 | return; |
09e6702a BH |
1608 | } |
1609 | } | |
1610 | } | |
1611 | } | |
1612 | ||
6dcd28c3 | 1613 | //! Handle new incoming TCP connection |
d187038c | 1614 | static void handleNewTCPQuestion(int fd, FDMultiplexer::funcparam_t& ) |
09e6702a | 1615 | { |
37d3f960 | 1616 | ComboAddress addr; |
09e6702a | 1617 | socklen_t addrlen=sizeof(addr); |
a683e8bd | 1618 | int newsock=accept(fd, (struct sockaddr*)&addr, &addrlen); |
b841314c | 1619 | if(newsock>=0) { |
85c32340 BH |
1620 | if(MT->numProcesses() > g_maxMThreads) { |
1621 | g_stats.overCapacityDrops++; | |
a7b68ae7 RG |
1622 | try { |
1623 | closesocket(newsock); | |
1624 | } | |
1625 | catch(const PDNSException& e) { | |
1626 | L<<Logger::Error<<"Error closing TCP socket after an over capacity drop: "<<e.reason<<endl; | |
1627 | } | |
85c32340 BH |
1628 | return; |
1629 | } | |
1630 | ||
92011b8f | 1631 | if(t_remotes) |
1632 | t_remotes->push_back(addr); | |
49a699c4 | 1633 | if(t_allowFrom && !t_allowFrom->match(&addr)) { |
3ddb9247 | 1634 | if(!g_quiet) |
4957a608 | 1635 | L<<Logger::Error<<"["<<MT->getTid()<<"] dropping TCP query from "<<addr.toString()<<", address not matched by allow-from"<<endl; |
2914b022 | 1636 | |
09e6702a | 1637 | g_stats.unauthorizedTCP++; |
a7b68ae7 RG |
1638 | try { |
1639 | closesocket(newsock); | |
1640 | } | |
1641 | catch(const PDNSException& e) { | |
1642 | L<<Logger::Error<<"Error closing TCP socket after an ACL drop: "<<e.reason<<endl; | |
1643 | } | |
09e6702a BH |
1644 | return; |
1645 | } | |
bd0289fc | 1646 | if(g_maxTCPPerClient && t_tcpClientCounts->count(addr) && (*t_tcpClientCounts)[addr] >= g_maxTCPPerClient) { |
09e6702a | 1647 | g_stats.tcpClientOverflow++; |
a7b68ae7 RG |
1648 | try { |
1649 | closesocket(newsock); // don't call TCPConnection::closeAndCleanup here - did not enter it in the counts yet! | |
1650 | } | |
1651 | catch(const PDNSException& e) { | |
1652 | L<<Logger::Error<<"Error closing TCP socket after an overflow drop: "<<e.reason<<endl; | |
1653 | } | |
09e6702a BH |
1654 | return; |
1655 | } | |
3ddb9247 | 1656 | |
3897b9e1 | 1657 | setNonBlocking(newsock); |
f26bf547 | 1658 | std::shared_ptr<TCPConnection> tc = std::make_shared<TCPConnection>(newsock, addr); |
cd989c87 | 1659 | tc->state=TCPConnection::BYTE0; |
3ddb9247 | 1660 | |
cd989c87 | 1661 | t_fdm->addReadFD(tc->getFD(), handleRunningTCPQuestion, tc); |
c038218b | 1662 | |
0bff046b | 1663 | struct timeval now; |
c038218b | 1664 | Utility::gettimeofday(&now, 0); |
cd989c87 | 1665 | t_fdm->setReadTTD(tc->getFD(), now, g_tcpTimeout); |
09e6702a BH |
1666 | } |
1667 | } | |
3ddb9247 | 1668 | |
d187038c | 1669 | static string* doProcessUDPQuestion(const std::string& question, const ComboAddress& fromaddr, const ComboAddress& destaddr, struct timeval tv, int fd) |
1bc3c142 | 1670 | { |
183eb877 | 1671 | gettimeofday(&g_now, 0); |
b71b60ee | 1672 | struct timeval diff = g_now - tv; |
1673 | double delta=(diff.tv_sec*1000 + diff.tv_usec/1000.0); | |
183eb877 | 1674 | |
22cf1fda | 1675 | if(tv.tv_sec && delta > 1000.0) { |
b71b60ee | 1676 | g_stats.tooOldDrops++; |
1677 | return 0; | |
1678 | } | |
1679 | ||
1bc3c142 | 1680 | ++g_stats.qcounter; |
d7f10541 BH |
1681 | if(fromaddr.sin4.sin_family==AF_INET6) |
1682 | g_stats.ipv6qcounter++; | |
1bc3c142 BH |
1683 | |
1684 | string response; | |
93f0da94 | 1685 | const struct dnsheader* dh = (struct dnsheader*)question.c_str(); |
49a3500d | 1686 | unsigned int ctag=0; |
f57486f1 | 1687 | uint32_t qhash = 0; |
12aff2e5 | 1688 | bool needECS = false; |
5cc8371b | 1689 | bool needXPF = g_XPFAcl.match(fromaddr); |
02b47f43 | 1690 | std::vector<std::string> policyTags; |
5fd2577f | 1691 | LuaContext::LuaObject data; |
5cc8371b RG |
1692 | ComboAddress source = fromaddr; |
1693 | ComboAddress destination = destaddr; | |
67e31ebe | 1694 | string requestorId; |
590388d2 | 1695 | string deviceId; |
12aff2e5 | 1696 | #ifdef HAVE_PROTOBUF |
02b47f43 | 1697 | boost::uuids::uuid uniqueId; |
02b47f43 RG |
1698 | auto luaconfsLocal = g_luaconfs.getLocal(); |
1699 | if (luaconfsLocal->protobufServer) { | |
4898a348 | 1700 | uniqueId = (*t_uuidGenerator)(); |
02b47f43 | 1701 | needECS = true; |
4898a348 | 1702 | } else if (luaconfsLocal->outgoingProtobufServer) { |
02b47f43 RG |
1703 | uniqueId = (*t_uuidGenerator)(); |
1704 | } | |
12aff2e5 | 1705 | #endif |
b40562da RG |
1706 | EDNSSubnetOpts ednssubnet; |
1707 | bool ecsFound = false; | |
1708 | bool ecsParsed = false; | |
1bc3c142 | 1709 | try { |
02b47f43 RG |
1710 | DNSName qname; |
1711 | uint16_t qtype=0; | |
1712 | uint16_t qclass=0; | |
1bc3c142 | 1713 | uint32_t age; |
c15ff3df | 1714 | bool qnameParsed=false; |
8f7473d7 | 1715 | #ifdef MALLOC_TRACE |
1716 | /* | |
1717 | static uint64_t last=0; | |
1718 | if(!last) | |
1719 | g_mtracer->clearAllocators(); | |
1720 | cout<<g_mtracer->getAllocs()-last<<" "<<g_mtracer->getNumOut()<<" -- BEGIN TRACE"<<endl; | |
1721 | last=g_mtracer->getAllocs(); | |
1722 | cout<<g_mtracer->topAllocatorsString()<<endl; | |
1723 | g_mtracer->clearAllocators(); | |
1724 | */ | |
1725 | #endif | |
55a1378f | 1726 | |
5cc8371b | 1727 | if(needECS || needXPF || (t_pdl && t_pdl->d_gettag)) { |
b2eacd67 | 1728 | try { |
00b8cadc | 1729 | std::map<uint16_t, EDNSOptionView> ednsOptions; |
5cc8371b RG |
1730 | bool xpfFound = false; |
1731 | ||
1732 | ecsFound = false; | |
1733 | ||
1734 | getQNameAndSubnet(question, &qname, &qtype, &qclass, | |
1735 | ecsFound, &ednssubnet, g_gettagNeedsEDNSOptions ? &ednsOptions : nullptr, | |
1736 | xpfFound, needXPF ? &source : nullptr, needXPF ? &destination : nullptr); | |
1737 | ||
c15ff3df RG |
1738 | qnameParsed = true; |
1739 | ecsParsed = true; | |
12aff2e5 | 1740 | |
f26bf547 | 1741 | if(t_pdl && t_pdl->d_gettag) { |
12aff2e5 | 1742 | try { |
5cc8371b | 1743 | ctag=t_pdl->gettag(source, ednssubnet.source, destination, qname, qtype, &policyTags, data, ednsOptions, false, requestorId, deviceId); |
12aff2e5 RG |
1744 | } |
1745 | catch(std::exception& e) { | |
1746 | if(g_logCommonErrors) | |
1747 | L<<Logger::Warning<<"Error parsing a query packet qname='"<<qname<<"' for tag determination, setting tag=0: "<<e.what()<<endl; | |
1748 | } | |
8ea8c302 | 1749 | } |
b2eacd67 | 1750 | } |
1751 | catch(std::exception& e) | |
1752 | { | |
1753 | if(g_logCommonErrors) | |
1754 | L<<Logger::Warning<<"Error parsing a query packet for tag determination, setting tag=0: "<<e.what()<<endl; | |
12aff2e5 | 1755 | } |
12ce523e | 1756 | } |
3ddb9247 | 1757 | |
02b47f43 | 1758 | bool cacheHit = false; |
d9d3f9c1 | 1759 | RecProtoBufMessage pbMessage(DNSProtoBufMessage::DNSProtoBufMessageType::Response); |
02b47f43 RG |
1760 | #ifdef HAVE_PROTOBUF |
1761 | if(luaconfsLocal->protobufServer) { | |
b790ef3d | 1762 | if (!luaconfsLocal->protobufTaggedOnly || !policyTags.empty()) { |
5cc8371b | 1763 | protobufLogQuery(luaconfsLocal->protobufServer, luaconfsLocal->protobufMaskV4, luaconfsLocal->protobufMaskV6, uniqueId, source, destination, ednssubnet.source, false, dh->id, question.size(), qname, qtype, qclass, policyTags, requestorId, deviceId); |
b790ef3d | 1764 | } |
d9d3f9c1 RG |
1765 | } |
1766 | #endif /* HAVE_PROTOBUF */ | |
02b47f43 | 1767 | |
c15ff3df RG |
1768 | if (qnameParsed) { |
1769 | cacheHit = (!SyncRes::s_nopacketcache && t_packetCache->getResponsePacket(ctag, question, qname, qtype, qclass, g_now.tv_sec, &response, &age, &qhash, &pbMessage)); | |
1770 | } | |
1771 | else { | |
1772 | cacheHit = (!SyncRes::s_nopacketcache && t_packetCache->getResponsePacket(ctag, question, g_now.tv_sec, &response, &age, &qhash, &pbMessage)); | |
1773 | } | |
1774 | ||
d9d3f9c1 RG |
1775 | if (cacheHit) { |
1776 | #ifdef HAVE_PROTOBUF | |
b790ef3d | 1777 | if(luaconfsLocal->protobufServer && (!luaconfsLocal->protobufTaggedOnly || !pbMessage.getAppliedPolicy().empty() || !pbMessage.getPolicyTags().empty())) { |
5cc8371b | 1778 | Netmask requestorNM(source, source.sin4.sin_family == AF_INET ? luaconfsLocal->protobufMaskV4 : luaconfsLocal->protobufMaskV6); |
e1c8a4bb | 1779 | const ComboAddress& requestor = requestorNM.getMaskedNetwork(); |
5cc8371b | 1780 | pbMessage.update(uniqueId, &requestor, &destination, false, dh->id); |
b40562da | 1781 | pbMessage.setEDNSSubnet(ednssubnet.source, ednssubnet.source.isIpv4() ? luaconfsLocal->protobufMaskV4 : luaconfsLocal->protobufMaskV6); |
58307a85 | 1782 | pbMessage.setQueryTime(g_now.tv_sec, g_now.tv_usec); |
67e31ebe | 1783 | pbMessage.setRequestorId(requestorId); |
590388d2 | 1784 | pbMessage.setDeviceId(deviceId); |
02b47f43 RG |
1785 | protobufLogResponse(luaconfsLocal->protobufServer, pbMessage); |
1786 | } | |
d9d3f9c1 | 1787 | #endif /* HAVE_PROTOBUF */ |
49a3500d | 1788 | if(!g_quiet) |
5cc8371b | 1789 | L<<Logger::Notice<<t_id<< " question answered from packet cache tag="<<ctag<<" from "<<source.toStringWithPort()<<(source != fromaddr ? " (via "+fromaddr.toStringWithPort()+")" : "")<<endl; |
8f7473d7 | 1790 | |
1bc3c142 BH |
1791 | g_stats.packetCacheHits++; |
1792 | SyncRes::s_queries++; | |
1793 | ageDNSPacket(response, age); | |
b71b60ee | 1794 | struct msghdr msgh; |
1795 | struct iovec iov; | |
1796 | char cbuf[256]; | |
1797 | fillMSGHdr(&msgh, &iov, cbuf, 0, (char*)response.c_str(), response.length(), const_cast<ComboAddress*>(&fromaddr)); | |
2c0af54f PD |
1798 | msgh.msg_control=NULL; |
1799 | ||
cbc03320 | 1800 | if(g_fromtosockets.count(fd)) { |
fbe2a2e0 | 1801 | addCMsgSrcAddr(&msgh, cbuf, &destaddr, 0); |
b71b60ee | 1802 | } |
cbc03320 | 1803 | if(sendmsg(fd, &msgh, 0) < 0 && g_logCommonErrors) |
5cc8371b | 1804 | L<<Logger::Warning<<"Sending UDP reply to client "<<source.toStringWithPort()<<(source != fromaddr ? " (via "+fromaddr.toStringWithPort()+")" : "")<<" failed with: "<<strerror(errno)<<endl; |
b71b60ee | 1805 | |
97bee66d | 1806 | if(response.length() >= sizeof(struct dnsheader)) { |
dd079764 RG |
1807 | struct dnsheader tmpdh; |
1808 | memcpy(&tmpdh, response.c_str(), sizeof(tmpdh)); | |
5cc8371b | 1809 | updateResponseStats(tmpdh.rcode, source, response.length(), 0, 0); |
97bee66d | 1810 | } |
08f3f638 | 1811 | g_stats.avgLatencyUsec=(1-1.0/g_latencyStatSize)*g_stats.avgLatencyUsec + 0.0; // we assume 0 usec |
19178da9 | 1812 | g_stats.avgLatencyOursUsec=(1-1.0/g_latencyStatSize)*g_stats.avgLatencyOursUsec + 0.0; // we assume 0 usec |
1bc3c142 BH |
1813 | return 0; |
1814 | } | |
3ddb9247 | 1815 | } |
1bc3c142 BH |
1816 | catch(std::exception& e) { |
1817 | L<<Logger::Error<<"Error processing or aging answer packet: "<<e.what()<<endl; | |
1818 | return 0; | |
1819 | } | |
3ddb9247 | 1820 | |
f26bf547 | 1821 | if(t_pdl) { |
5cc8371b | 1822 | if(t_pdl->ipfilter(source, destination, *dh)) { |
4ea94941 | 1823 | if(!g_quiet) |
5cc8371b | 1824 | L<<Logger::Notice<<t_id<<" ["<<MT->getTid()<<"/"<<MT->numProcesses()<<"] DROPPED question from "<<source.toStringWithPort()<<(source != fromaddr ? " (via "+fromaddr.toStringWithPort()+")" : "")<<" based on policy"<<endl; |
4ea94941 | 1825 | g_stats.policyDrops++; |
1826 | return 0; | |
1827 | } | |
1828 | } | |
1829 | ||
1bc3c142 | 1830 | if(MT->numProcesses() > g_maxMThreads) { |
461df9d2 | 1831 | if(!g_quiet) |
5cc8371b | 1832 | L<<Logger::Notice<<t_id<<" ["<<MT->getTid()<<"/"<<MT->numProcesses()<<"] DROPPED question from "<<source.toStringWithPort()<<(source != fromaddr ? " (via "+fromaddr.toStringWithPort()+")" : "")<<", over capacity"<<endl; |
461df9d2 | 1833 | |
1bc3c142 BH |
1834 | g_stats.overCapacityDrops++; |
1835 | return 0; | |
1836 | } | |
3ddb9247 | 1837 | |
1bc3c142 BH |
1838 | DNSComboWriter* dc = new DNSComboWriter(question.c_str(), question.size(), g_now); |
1839 | dc->setSocket(fd); | |
49a3500d | 1840 | dc->d_tag=ctag; |
e9f63d47 | 1841 | dc->d_qhash=qhash; |
49a3500d | 1842 | dc->d_query = question; |
5cc8371b RG |
1843 | dc->setRemote(fromaddr); |
1844 | dc->setSource(source); | |
b71b60ee | 1845 | dc->setLocal(destaddr); |
5cc8371b | 1846 | dc->setDestination(destination); |
1bc3c142 | 1847 | dc->d_tcp=false; |
02b47f43 | 1848 | dc->d_policyTags = policyTags; |
05c74122 | 1849 | dc->d_data = data; |
b40562da RG |
1850 | dc->d_ecsFound = ecsFound; |
1851 | dc->d_ecsParsed = ecsParsed; | |
1852 | dc->d_ednssubnet = ednssubnet; | |
aa7929a3 | 1853 | #ifdef HAVE_PROTOBUF |
4898a348 | 1854 | if (luaconfsLocal->protobufServer || luaconfsLocal->outgoingProtobufServer) { |
d9d3f9c1 RG |
1855 | dc->d_uuid = uniqueId; |
1856 | } | |
67e31ebe | 1857 | dc->d_requestorId = requestorId; |
590388d2 | 1858 | dc->d_deviceId = deviceId; |
aa7929a3 RG |
1859 | #endif |
1860 | ||
1bc3c142 BH |
1861 | MT->makeThread(startDoResolve, (void*) dc); // deletes dc |
1862 | return 0; | |
3ddb9247 PD |
1863 | } |
1864 | ||
b71b60ee | 1865 | |
d187038c | 1866 | static void handleNewUDPQuestion(int fd, FDMultiplexer::funcparam_t& var) |
5db529f8 | 1867 | { |
a683e8bd | 1868 | ssize_t len; |
5db529f8 BH |
1869 | char data[1500]; |
1870 | ComboAddress fromaddr; | |
b71b60ee | 1871 | struct msghdr msgh; |
1872 | struct iovec iov; | |
1873 | char cbuf[256]; | |
390f1dab | 1874 | bool firstQuery = true; |
b71b60ee | 1875 | |
1876 | fromaddr.sin6.sin6_family=AF_INET6; // this makes sure fromaddr is big enough | |
1877 | fillMSGHdr(&msgh, &iov, cbuf, sizeof(cbuf), data, sizeof(data), &fromaddr); | |
1878 | ||
3ddb9247 | 1879 | for(;;) |
b71b60ee | 1880 | if((len=recvmsg(fd, &msgh, 0)) >= 0) { |
390f1dab RG |
1881 | |
1882 | firstQuery = false; | |
1883 | ||
92011b8f | 1884 | if(t_remotes) |
1885 | t_remotes->push_back(fromaddr); | |
b23b8614 | 1886 | |
49a699c4 | 1887 | if(t_allowFrom && !t_allowFrom->match(&fromaddr)) { |
3ddb9247 | 1888 | if(!g_quiet) |
4957a608 | 1889 | L<<Logger::Error<<"["<<MT->getTid()<<"] dropping UDP query from "<<fromaddr.toString()<<", address not matched by allow-from"<<endl; |
2914b022 | 1890 | |
5db529f8 | 1891 | g_stats.unauthorizedUDP++; |
a9af3782 | 1892 | return; |
5db529f8 | 1893 | } |
15c01deb | 1894 | BOOST_STATIC_ASSERT(offsetof(sockaddr_in, sin_port) == offsetof(sockaddr_in6, sin6_port)); |
81859ba5 | 1895 | if(!fromaddr.sin4.sin_port) { // also works for IPv6 |
3ddb9247 | 1896 | if(!g_quiet) |
81859ba5 | 1897 | L<<Logger::Error<<"["<<MT->getTid()<<"] dropping UDP query from "<<fromaddr.toStringWithPort()<<", can't deal with port 0"<<endl; |
1898 | ||
1899 | g_stats.clientParseError++; // not quite the best place to put it, but needs to go somewhere | |
1900 | return; | |
1901 | } | |
5db529f8 | 1902 | try { |
b23b8614 | 1903 | dnsheader* dh=(dnsheader*)data; |
3ddb9247 | 1904 | |
b23b8614 | 1905 | if(dh->qr) { |
048f5db6 | 1906 | g_stats.ignoredCount++; |
4957a608 BH |
1907 | if(g_logCommonErrors) |
1908 | L<<Logger::Error<<"Ignoring answer from "<<fromaddr.toString()<<" on server socket!"<<endl; | |
5db529f8 | 1909 | } |
3abcdab2 | 1910 | else if(dh->opcode) { |
048f5db6 | 1911 | g_stats.ignoredCount++; |
3abcdab2 PD |
1912 | if(g_logCommonErrors) |
1913 | L<<Logger::Error<<"Ignoring non-query opcode "<<dh->opcode<<" from "<<fromaddr.toString()<<" on server socket!"<<endl; | |
1914 | } | |
5db529f8 | 1915 | else { |
a683e8bd | 1916 | string question(data, (size_t)len); |
b71b60ee | 1917 | struct timeval tv={0,0}; |
1918 | HarvestTimestamp(&msgh, &tv); | |
1919 | ComboAddress dest; | |
c3cecd36 | 1920 | memset(&dest, 0, sizeof(dest)); // this makes sure we ignore this address if not returned by recvmsg above |
a6147cd2 | 1921 | auto loc = rplookup(g_listenSocketsAddresses, fd); |
1922 | if(HarvestDestinationAddress(&msgh, &dest)) { | |
1923 | // but.. need to get port too | |
1924 | if(loc) | |
1925 | dest.sin4.sin_port = loc->sin4.sin_port; | |
1926 | } | |
1927 | else { | |
1928 | if(loc) { | |
1929 | dest = *loc; | |
1930 | } | |
1931 | else { | |
1932 | dest.sin4.sin_family = fromaddr.sin4.sin_family; | |
a683e8bd RG |
1933 | socklen_t slen = dest.getSocklen(); |
1934 | getsockname(fd, (sockaddr*)&dest, &slen); // if this fails, we're ok with it | |
a6147cd2 | 1935 | } |
1936 | } | |
232f0877 | 1937 | if(g_weDistributeQueries) |
b71b60ee | 1938 | distributeAsyncFunction(question, boost::bind(doProcessUDPQuestion, question, fromaddr, dest, tv, fd)); |
232f0877 | 1939 | else |
b71b60ee | 1940 | doProcessUDPQuestion(question, fromaddr, dest, tv, fd); |
5db529f8 BH |
1941 | } |
1942 | } | |
1943 | catch(MOADNSException& mde) { | |
3ddb9247 | 1944 | g_stats.clientParseError++; |
84e66a59 | 1945 | if(g_logCommonErrors) |
4957a608 | 1946 | L<<Logger::Error<<"Unable to parse packet from remote UDP client "<<fromaddr.toString() <<": "<<mde.what()<<endl; |
5db529f8 | 1947 | } |
0b602819 KM |
1948 | catch(std::runtime_error& e) { |
1949 | g_stats.clientParseError++; | |
1950 | if(g_logCommonErrors) | |
1951 | L<<Logger::Error<<"Unable to parse packet from remote UDP client "<<fromaddr.toString() <<": "<<e.what()<<endl; | |
5db529f8 BH |
1952 | } |
1953 | } | |
ac0e821b BH |
1954 | else { |
1955 | // cerr<<t_id<<" had error: "<<stringerror()<<endl; | |
390f1dab | 1956 | if(firstQuery && errno == EAGAIN) |
9326cae1 | 1957 | g_stats.noPacketError++; |
390f1dab | 1958 | |
bf3b0cec | 1959 | break; |
ac0e821b | 1960 | } |
5db529f8 BH |
1961 | } |
1962 | ||
810ff705 | 1963 | static void makeTCPServerSockets(unsigned int threadId) |
9c495589 | 1964 | { |
37d3f960 | 1965 | int fd; |
f28307ad | 1966 | vector<string>locals; |
2e3d8a19 | 1967 | stringtok(locals,::arg()["local-address"]," ,"); |
9c495589 | 1968 | |
f28307ad | 1969 | if(locals.empty()) |
3f81d239 | 1970 | throw PDNSException("No local address specified"); |
3ddb9247 | 1971 | |
f28307ad | 1972 | for(vector<string>::const_iterator i=locals.begin();i!=locals.end();++i) { |
32252594 BH |
1973 | ServiceTuple st; |
1974 | st.port=::arg().asNum("local-port"); | |
1975 | parseService(*i, st); | |
3ddb9247 | 1976 | |
32252594 BH |
1977 | ComboAddress sin; |
1978 | ||
f28307ad | 1979 | memset((char *)&sin,0, sizeof(sin)); |
37d3f960 | 1980 | sin.sin4.sin_family = AF_INET; |
32252594 | 1981 | if(!IpToU32(st.host, (uint32_t*)&sin.sin4.sin_addr.s_addr)) { |
37d3f960 | 1982 | sin.sin6.sin6_family = AF_INET6; |
f71bc087 | 1983 | if(makeIPv6sockaddr(st.host, &sin.sin6) < 0) |
3ddb9247 | 1984 | throw PDNSException("Unable to resolve local address for TCP server on '"+ st.host +"'"); |
37d3f960 BH |
1985 | } |
1986 | ||
1987 | fd=socket(sin.sin6.sin6_family, SOCK_STREAM, 0); | |
3ddb9247 | 1988 | if(fd<0) |
3f81d239 | 1989 | throw PDNSException("Making a TCP server socket for resolver: "+stringerror()); |
f28307ad | 1990 | |
3897b9e1 | 1991 | setCloseOnExec(fd); |
a903b39c | 1992 | |
f28307ad | 1993 | int tmp=1; |
810ff705 | 1994 | if(setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof tmp)<0) { |
f28307ad | 1995 | L<<Logger::Error<<"Setsockopt failed for TCP listening socket"<<endl; |
c8ddb7c2 | 1996 | exit(1); |
f28307ad | 1997 | } |
0dfa94ab | 1998 | if(sin.sin6.sin6_family == AF_INET6 && setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &tmp, sizeof(tmp)) < 0) { |
1999 | L<<Logger::Error<<"Failed to set IPv6 socket to IPv6 only, continuing anyhow: "<<strerror(errno)<<endl; | |
2000 | } | |
2001 | ||
c8ddb7c2 | 2002 | #ifdef TCP_DEFER_ACCEPT |
38ac0821 | 2003 | if(setsockopt(fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &tmp, sizeof tmp) >= 0) { |
37d3f960 | 2004 | if(i==locals.begin()) |
4957a608 | 2005 | L<<Logger::Error<<"Enabled TCP data-ready filter for (slight) DoS protection"<<endl; |
c8ddb7c2 BH |
2006 | } |
2007 | #endif | |
2008 | ||
fec7dd5a SS |
2009 | if( ::arg().mustDo("non-local-bind") ) |
2010 | Utility::setBindAny(AF_INET, fd); | |
2011 | ||
2332f42d | 2012 | #ifdef SO_REUSEPORT |
810ff705 RG |
2013 | if(g_reusePort) { |
2014 | if(setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &tmp, sizeof(tmp)) < 0) | |
2332f42d | 2015 | throw PDNSException("SO_REUSEPORT: "+stringerror()); |
2016 | } | |
2017 | #endif | |
2018 | ||
0735b17e RG |
2019 | if (::arg().asNum("tcp-fast-open") > 0) { |
2020 | #ifdef TCP_FASTOPEN | |
2021 | int fastOpenQueueSize = ::arg().asNum("tcp-fast-open"); | |
2022 | if (setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &fastOpenQueueSize, sizeof fastOpenQueueSize) < 0) { | |
2023 | L<<Logger::Error<<"Failed to enable TCP Fast Open for listening socket: "<<strerror(errno)<<endl; | |
2024 | } | |
2025 | #else | |
2026 | L<<Logger::Warning<<"TCP Fast Open configured but not supported for listening socket"<<endl; | |
2027 | #endif | |
2028 | } | |
2029 | ||
32252594 | 2030 | sin.sin4.sin_port = htons(st.port); |
a683e8bd | 2031 | socklen_t socklen=sin.sin4.sin_family==AF_INET ? sizeof(sin.sin4) : sizeof(sin.sin6); |
3ddb9247 | 2032 | if (::bind(fd, (struct sockaddr *)&sin, socklen )<0) |
3f81d239 | 2033 | throw PDNSException("Binding TCP server socket for "+ st.host +": "+stringerror()); |
3ddb9247 | 2034 | |
3897b9e1 | 2035 | setNonBlocking(fd); |
49a699c4 | 2036 | setSocketSendBuffer(fd, 65000); |
37d3f960 | 2037 | listen(fd, 128); |
810ff705 | 2038 | deferredAdds[threadId].push_back(make_pair(fd, handleNewTCPQuestion)); |
c2136bf0 | 2039 | g_tcpListenSockets.push_back(fd); |
84433b79 | 2040 | // we don't need to update g_listenSocketsAddresses since it doesn't work for TCP/IP: |
2041 | // - fd is not that which we know here, but returned from accept() | |
3ddb9247 | 2042 | if(sin.sin4.sin_family == AF_INET) |
32252594 | 2043 | L<<Logger::Error<<"Listening for TCP queries on "<< sin.toString() <<":"<<st.port<<endl; |
aa136564 | 2044 | else |
32252594 | 2045 | L<<Logger::Error<<"Listening for TCP queries on ["<< sin.toString() <<"]:"<<st.port<<endl; |
f28307ad | 2046 | } |
9c495589 BH |
2047 | } |
2048 | ||
810ff705 | 2049 | static void makeUDPServerSockets(unsigned int threadId) |
288f4aa9 | 2050 | { |
fec7dd5a | 2051 | int one=1; |
f28307ad | 2052 | vector<string>locals; |
2e3d8a19 | 2053 | stringtok(locals,::arg()["local-address"]," ,"); |
288f4aa9 | 2054 | |
f28307ad | 2055 | if(locals.empty()) |
3f81d239 | 2056 | throw PDNSException("No local address specified"); |
3ddb9247 | 2057 | |
f28307ad | 2058 | for(vector<string>::const_iterator i=locals.begin();i!=locals.end();++i) { |
32252594 BH |
2059 | ServiceTuple st; |
2060 | st.port=::arg().asNum("local-port"); | |
2061 | parseService(*i, st); | |
2062 | ||
37d3f960 | 2063 | ComboAddress sin; |
996c89cc | 2064 | |
37d3f960 BH |
2065 | memset(&sin, 0, sizeof(sin)); |
2066 | sin.sin4.sin_family = AF_INET; | |
32252594 | 2067 | if(!IpToU32(st.host.c_str() , (uint32_t*)&sin.sin4.sin_addr.s_addr)) { |
37d3f960 | 2068 | sin.sin6.sin6_family = AF_INET6; |
f71bc087 | 2069 | if(makeIPv6sockaddr(st.host, &sin.sin6) < 0) |
3ddb9247 | 2070 | throw PDNSException("Unable to resolve local address for UDP server on '"+ st.host +"'"); |
37d3f960 | 2071 | } |
3ddb9247 | 2072 | |
bb4bdbaf | 2073 | int fd=socket(sin.sin4.sin_family, SOCK_DGRAM, 0); |
d3b4137e | 2074 | if(fd < 0) { |
3f81d239 | 2075 | throw PDNSException("Making a UDP server socket for resolver: "+netstringerror()); |
d3b4137e | 2076 | } |
915b0c39 AT |
2077 | if (!setSocketTimestamps(fd)) |
2078 | L<<Logger::Warning<<"Unable to enable timestamp reporting for socket"<<endl; | |
0dfa94ab | 2079 | |
b71b60ee | 2080 | if(IsAnyAddress(sin)) { |
cbc03320 | 2081 | if(sin.sin4.sin_family == AF_INET) |
2082 | if(!setsockopt(fd, IPPROTO_IP, GEN_IP_PKTINFO, &one, sizeof(one))) // linux supports this, so why not - might fail on other systems | |
2083 | g_fromtosockets.insert(fd); | |
757d3179 | 2084 | #ifdef IPV6_RECVPKTINFO |
cbc03320 | 2085 | if(sin.sin4.sin_family == AF_INET6) |
2086 | if(!setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one))) | |
2087 | g_fromtosockets.insert(fd); | |
757d3179 | 2088 | #endif |
0dfa94ab | 2089 | if(sin.sin6.sin6_family == AF_INET6 && setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one)) < 0) { |
2090 | L<<Logger::Error<<"Failed to set IPv6 socket to IPv6 only, continuing anyhow: "<<strerror(errno)<<endl; | |
2091 | } | |
b71b60ee | 2092 | } |
fec7dd5a SS |
2093 | if( ::arg().mustDo("non-local-bind") ) |
2094 | Utility::setBindAny(AF_INET6, fd); | |
2095 | ||
3897b9e1 | 2096 | setCloseOnExec(fd); |
a903b39c | 2097 | |
4e9a20e6 | 2098 | setSocketReceiveBuffer(fd, 250000); |
32252594 | 2099 | sin.sin4.sin_port = htons(st.port); |
37d3f960 | 2100 | |
2332f42d | 2101 | |
2573d4a6 | 2102 | #ifdef SO_REUSEPORT |
810ff705 | 2103 | if(g_reusePort) { |
2332f42d | 2104 | if(setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one)) < 0) |
2105 | throw PDNSException("SO_REUSEPORT: "+stringerror()); | |
2106 | } | |
2107 | #endif | |
a683e8bd | 2108 | socklen_t socklen=sin.getSocklen(); |
3ddb9247 | 2109 | if (::bind(fd, (struct sockaddr *)&sin, socklen)<0) |
335da0ba | 2110 | throw PDNSException("Resolver binding to server socket on port "+ std::to_string(st.port) +" for "+ st.host+": "+stringerror()); |
3ddb9247 | 2111 | |
3897b9e1 | 2112 | setNonBlocking(fd); |
c2136bf0 | 2113 | |
810ff705 | 2114 | deferredAdds[threadId].push_back(make_pair(fd, handleNewUDPQuestion)); |
40a3dd64 | 2115 | g_listenSocketsAddresses[fd]=sin; // this is written to only from the startup thread, not from the workers |
3ddb9247 | 2116 | if(sin.sin4.sin_family == AF_INET) |
32252594 | 2117 | L<<Logger::Error<<"Listening for UDP queries on "<< sin.toString() <<":"<<st.port<<endl; |
aa136564 | 2118 | else |
32252594 | 2119 | L<<Logger::Error<<"Listening for UDP queries on ["<< sin.toString() <<"]:"<<st.port<<endl; |
f28307ad | 2120 | } |
c836dc19 | 2121 | } |
caa6eefa | 2122 | |
d187038c | 2123 | static void daemonize(void) |
c836dc19 BH |
2124 | { |
2125 | if(fork()) | |
2126 | exit(0); // bye bye | |
3ddb9247 PD |
2127 | |
2128 | setsid(); | |
c836dc19 | 2129 | |
27a5ead5 | 2130 | int i=open("/dev/null",O_RDWR); /* open stdin */ |
3ddb9247 | 2131 | if(i < 0) |
27a5ead5 BH |
2132 | L<<Logger::Critical<<"Unable to open /dev/null: "<<stringerror()<<endl; |
2133 | else { | |
2134 | dup2(i,0); /* stdin */ | |
2135 | dup2(i,1); /* stderr */ | |
2136 | dup2(i,2); /* stderr */ | |
2137 | close(i); | |
2138 | } | |
288f4aa9 | 2139 | } |
caa6eefa | 2140 | |
d187038c | 2141 | static void usr1Handler(int) |
c75a6a9e BH |
2142 | { |
2143 | statsWanted=true; | |
2144 | } | |
ae1b2e98 | 2145 | |
d187038c | 2146 | static void usr2Handler(int) |
9170fbaf | 2147 | { |
f1f34cc2 | 2148 | g_quiet= !g_quiet; |
2149 | SyncRes::setDefaultLogMode(g_quiet ? SyncRes::LogNone : SyncRes::Log); | |
2150 | ::arg().set("quiet")=g_quiet ? "" : "no"; | |
9170fbaf BH |
2151 | } |
2152 | ||
d187038c | 2153 | static void doStats(void) |
c75a6a9e | 2154 | { |
16beeaa4 BH |
2155 | static time_t lastOutputTime; |
2156 | static uint64_t lastQueryCount; | |
d299d4f5 | 2157 | |
2158 | uint64_t cacheHits = broadcastAccFunction<uint64_t>(pleaseGetCacheHits); | |
2159 | uint64_t cacheMisses = broadcastAccFunction<uint64_t>(pleaseGetCacheMisses); | |
3ddb9247 | 2160 | |
d299d4f5 | 2161 | if(g_stats.qcounter && (cacheHits + cacheMisses) && SyncRes::s_queries && SyncRes::s_outqueries) { |
bd301954 | 2162 | L<<Logger::Notice<<"stats: "<<g_stats.qcounter<<" questions, "<< |
3427fa8a BH |
2163 | broadcastAccFunction<uint64_t>(pleaseGetCacheSize)<< " cache entries, "<< |
2164 | broadcastAccFunction<uint64_t>(pleaseGetNegCacheSize)<<" negative entries, "<< | |
3ddb9247 PD |
2165 | (int)((cacheHits*100.0)/(cacheHits+cacheMisses))<<"% cache hits"<<endl; |
2166 | ||
bd301954 | 2167 | L<<Logger::Notice<<"stats: throttle map: " |
3427fa8a | 2168 | << broadcastAccFunction<uint64_t>(pleaseGetThrottleSize) <<", ns speeds: " |
3ddb9247 | 2169 | << broadcastAccFunction<uint64_t>(pleaseGetNsSpeedsSize)<<endl; |
bd301954 JB |
2170 | L<<Logger::Notice<<"stats: outpacket/query ratio "<<(int)(SyncRes::s_outqueries*100.0/SyncRes::s_queries)<<"%"; |
2171 | L<<Logger::Notice<<", "<<(int)(SyncRes::s_throttledqueries*100.0/(SyncRes::s_outqueries+SyncRes::s_throttledqueries))<<"% throttled, " | |
525b8a7c | 2172 | <<SyncRes::s_nodelegated<<" no-delegation drops"<<endl; |
bd301954 | 2173 | L<<Logger::Notice<<"stats: "<<SyncRes::s_tcpoutqueries<<" outgoing tcp connections, "<< |
3427fa8a | 2174 | broadcastAccFunction<uint64_t>(pleaseGetConcurrentQueries)<<" queries running, "<<SyncRes::s_outgoingtimeouts<<" outgoing timeouts"<<endl; |
81883dcc | 2175 | |
bd301954 | 2176 | //L<<Logger::Notice<<"stats: "<<g_stats.ednsPingMatches<<" ping matches, "<<g_stats.ednsPingMismatches<<" mismatches, "<< |
16beeaa4 | 2177 | //g_stats.noPingOutQueries<<" outqueries w/o ping, "<< g_stats.noEdnsOutQueries<<" w/o EDNS"<<endl; |
3ddb9247 | 2178 | |
bd301954 | 2179 | L<<Logger::Notice<<"stats: " << broadcastAccFunction<uint64_t>(pleaseGetPacketCacheSize) << |
16beeaa4 | 2180 | " packet cache entries, "<<(int)(100.0*broadcastAccFunction<uint64_t>(pleaseGetPacketCacheHits)/SyncRes::s_queries) << "% packet cache hits"<<endl; |
3ddb9247 | 2181 | |
16beeaa4 BH |
2182 | time_t now = time(0); |
2183 | if(lastOutputTime && lastQueryCount && now != lastOutputTime) { | |
bd301954 | 2184 | L<<Logger::Notice<<"stats: "<< (SyncRes::s_queries - lastQueryCount) / (now - lastOutputTime) <<" qps (average over "<< (now - lastOutputTime) << " seconds)"<<endl; |
16beeaa4 BH |
2185 | } |
2186 | lastOutputTime = now; | |
2187 | lastQueryCount = SyncRes::s_queries; | |
c75a6a9e | 2188 | } |
3ddb9247 | 2189 | else if(statsWanted) |
bd301954 | 2190 | L<<Logger::Notice<<"stats: no stats yet!"<<endl; |
7becf07f | 2191 | |
c75a6a9e BH |
2192 | statsWanted=false; |
2193 | } | |
c836dc19 | 2194 | |
29f0b1ce | 2195 | static void houseKeeping(void *) |
c836dc19 | 2196 | { |
3337c2f7 RG |
2197 | static thread_local time_t last_stat, last_rootupdate, last_prune, last_secpoll; |
2198 | static thread_local int cleanCounter=0; | |
2199 | static thread_local bool s_running; // houseKeeping can get suspended in secpoll, and be restarted, which makes us do duplicate work | |
cc59bce6 | 2200 | try { |
2201 | if(s_running) | |
2202 | return; | |
2203 | s_running=true; | |
3ddb9247 | 2204 | |
cc59bce6 | 2205 | struct timeval now; |
2206 | Utility::gettimeofday(&now, 0); | |
3ddb9247 PD |
2207 | |
2208 | if(now.tv_sec - last_prune > (time_t)(5 + t_id)) { | |
cc59bce6 | 2209 | DTime dt; |
2210 | dt.setTimeval(now); | |
a6f7f5fe | 2211 | t_RC->doPrune(g_maxCacheEntries / g_numThreads); // this function is local to a thread, so fine anyhow |
2212 | t_packetCache->doPruneTo(g_maxPacketCacheEntries / g_numWorkerThreads); | |
3ddb9247 | 2213 | |
a6f7f5fe | 2214 | SyncRes::pruneNegCache(g_maxCacheEntries / (g_numWorkerThreads * 10)); |
3ddb9247 | 2215 | |
cc59bce6 | 2216 | if(!((cleanCounter++)%40)) { // this is a full scan! |
2217 | time_t limit=now.tv_sec-300; | |
a712cb56 | 2218 | SyncRes::pruneNSSpeeds(limit); |
cc59bce6 | 2219 | } |
2220 | last_prune=time(0); | |
d67620e4 | 2221 | } |
3ddb9247 | 2222 | |
cc59bce6 | 2223 | if(now.tv_sec - last_rootupdate > 7200) { |
30ee601a | 2224 | int res = SyncRes::getRootNS(g_now, nullptr); |
7836f7b4 PL |
2225 | if (!res) |
2226 | last_rootupdate=now.tv_sec; | |
cc59bce6 | 2227 | } |
3ddb9247 | 2228 | |
cc59bce6 | 2229 | if(!t_id) { |
0ec489bf | 2230 | if(g_statisticsInterval > 0 && now.tv_sec - last_stat >= g_statisticsInterval) { |
cc59bce6 | 2231 | doStats(); |
2232 | last_stat=time(0); | |
2233 | } | |
3ddb9247 | 2234 | |
cc59bce6 | 2235 | if(now.tv_sec - last_secpoll >= 3600) { |
2236 | try { | |
2237 | doSecPoll(&last_secpoll); | |
2238 | } | |
581d4ea3 | 2239 | catch(std::exception& e) |
2240 | { | |
2241 | L<<Logger::Error<<"Exception while performing security poll: "<<e.what()<<endl; | |
2242 | } | |
47e9b74f | 2243 | catch(PDNSException& e) |
2244 | { | |
2245 | L<<Logger::Error<<"Exception while performing security poll: "<<e.reason<<endl; | |
2246 | } | |
d0992a65 CH |
2247 | catch(ImmediateServFailException &e) |
2248 | { | |
2249 | L<<Logger::Error<<"Exception while performing security poll: "<<e.reason<<endl; | |
2250 | } | |
47e9b74f | 2251 | catch(...) |
2252 | { | |
2253 | L<<Logger::Error<<"Exception while performing security poll"<<endl; | |
2254 | } | |
2255 | ||
18b73338 | 2256 | } |
d67620e4 | 2257 | } |
cc59bce6 | 2258 | s_running=false; |
d67620e4 | 2259 | } |
cc59bce6 | 2260 | catch(PDNSException& ae) |
2261 | { | |
2262 | s_running=false; | |
2263 | L<<Logger::Error<<"Fatal error in housekeeping thread: "<<ae.reason<<endl; | |
2264 | throw; | |
2265 | } | |
779828c4 | 2266 | } |
d6d5dea7 | 2267 | |
d187038c | 2268 | static void makeThreadPipes() |
49a699c4 | 2269 | { |
c3828c03 | 2270 | for(unsigned int n=0; n < g_numThreads; ++n) { |
49a699c4 BH |
2271 | struct ThreadPipeSet tps; |
2272 | int fd[2]; | |
2273 | if(pipe(fd) < 0) | |
2274 | unixDie("Creating pipe for inter-thread communications"); | |
3ddb9247 | 2275 | |
49a699c4 BH |
2276 | tps.readToThread = fd[0]; |
2277 | tps.writeToThread = fd[1]; | |
3ddb9247 | 2278 | |
49a699c4 BH |
2279 | if(pipe(fd) < 0) |
2280 | unixDie("Creating pipe for inter-thread communications"); | |
2281 | tps.readFromThread = fd[0]; | |
2282 | tps.writeFromThread = fd[1]; | |
3ddb9247 | 2283 | |
49a699c4 BH |
2284 | g_pipes.push_back(tps); |
2285 | } | |
2286 | } | |
2287 | ||
00c9b8c1 BH |
2288 | struct ThreadMSG |
2289 | { | |
2290 | pipefunc_t func; | |
2291 | bool wantAnswer; | |
2292 | }; | |
2293 | ||
49a699c4 BH |
2294 | void broadcastFunction(const pipefunc_t& func, bool skipSelf) |
2295 | { | |
49a699c4 | 2296 | unsigned int n = 0; |
1dc8f4d0 | 2297 | for(ThreadPipeSet& tps : g_pipes) |
49a699c4 BH |
2298 | { |
2299 | if(n++ == t_id) { | |
2300 | if(!skipSelf) | |
2301 | func(); // don't write to ourselves! | |
2302 | continue; | |
2303 | } | |
3ddb9247 | 2304 | |
00c9b8c1 BH |
2305 | ThreadMSG* tmsg = new ThreadMSG(); |
2306 | tmsg->func = func; | |
2307 | tmsg->wantAnswer = true; | |
b841314c RG |
2308 | if(write(tps.writeToThread, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) { |
2309 | delete tmsg; | |
49a699c4 | 2310 | unixDie("write to thread pipe returned wrong size or error"); |
b841314c | 2311 | } |
3ddb9247 | 2312 | |
49a699c4 BH |
2313 | string* resp; |
2314 | if(read(tps.readFromThread, &resp, sizeof(resp)) != sizeof(resp)) | |
2315 | unixDie("read from thread pipe returned wrong size or error"); | |
3ddb9247 | 2316 | |
49a699c4 BH |
2317 | if(resp) { |
2318 | // cerr <<"got response: " << *resp << endl; | |
2319 | delete resp; | |
2320 | } | |
2321 | } | |
2322 | } | |
06ea9015 | 2323 | |
8171ab83 | 2324 | void distributeAsyncFunction(const string& packet, const pipefunc_t& func) |
00c9b8c1 | 2325 | { |
8171ab83 | 2326 | unsigned int hash = hashQuestion(packet.c_str(), packet.length(), g_disthashseed); |
06ea9015 | 2327 | unsigned int target = 1 + (hash % (g_pipes.size()-1)); |
2328 | ||
00c9b8c1 BH |
2329 | if(target == t_id) { |
2330 | func(); | |
2331 | return; | |
2332 | } | |
3ddb9247 | 2333 | ThreadPipeSet& tps = g_pipes[target]; |
00c9b8c1 BH |
2334 | ThreadMSG* tmsg = new ThreadMSG(); |
2335 | tmsg->func = func; | |
2336 | tmsg->wantAnswer = false; | |
3ddb9247 | 2337 | |
b841314c RG |
2338 | if(write(tps.writeToThread, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) { |
2339 | delete tmsg; | |
3ddb9247 | 2340 | unixDie("write to thread pipe returned wrong size or error"); |
b841314c | 2341 | } |
00c9b8c1 | 2342 | } |
3427fa8a | 2343 | |
d187038c | 2344 | static void handlePipeRequest(int fd, FDMultiplexer::funcparam_t& var) |
49a699c4 | 2345 | { |
f26bf547 | 2346 | ThreadMSG* tmsg = nullptr; |
3ddb9247 PD |
2347 | |
2348 | if(read(fd, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) { // fd == readToThread | |
49a699c4 BH |
2349 | unixDie("read from thread pipe returned wrong size or error"); |
2350 | } | |
3ddb9247 | 2351 | |
2f22827a | 2352 | void *resp=0; |
2353 | try { | |
2354 | resp = tmsg->func(); | |
2355 | } | |
2356 | catch(std::exception& e) { | |
6d2010a8 | 2357 | if(g_logCommonErrors) |
2358 | L<<Logger::Error<<"PIPE function we executed created exception: "<<e.what()<<endl; // but what if they wanted an answer.. we send 0 | |
2f22827a | 2359 | } |
2360 | catch(PDNSException& e) { | |
6d2010a8 | 2361 | if(g_logCommonErrors) |
2362 | L<<Logger::Error<<"PIPE function we executed created PDNS exception: "<<e.reason<<endl; // but what if they wanted an answer.. we send 0 | |
2f22827a | 2363 | } |
d7c676a5 RG |
2364 | if(tmsg->wantAnswer) { |
2365 | if(write(g_pipes[t_id].writeFromThread, &resp, sizeof(resp)) != sizeof(resp)) { | |
2366 | delete tmsg; | |
00c9b8c1 | 2367 | unixDie("write to thread pipe returned wrong size or error"); |
d7c676a5 RG |
2368 | } |
2369 | } | |
3ddb9247 | 2370 | |
00c9b8c1 | 2371 | delete tmsg; |
49a699c4 | 2372 | } |
09e6702a | 2373 | |
13034931 BH |
2374 | template<class T> void *voider(const boost::function<T*()>& func) |
2375 | { | |
2376 | return func(); | |
2377 | } | |
2378 | ||
b3b5459d BH |
2379 | vector<ComboAddress>& operator+=(vector<ComboAddress>&a, const vector<ComboAddress>& b) |
2380 | { | |
2381 | a.insert(a.end(), b.begin(), b.end()); | |
2382 | return a; | |
2383 | } | |
2384 | ||
92011b8f | 2385 | vector<pair<string, uint16_t> >& operator+=(vector<pair<string, uint16_t> >&a, const vector<pair<string, uint16_t> >& b) |
2386 | { | |
2387 | a.insert(a.end(), b.begin(), b.end()); | |
2388 | return a; | |
2389 | } | |
2390 | ||
3ddb9247 PD |
2391 | vector<pair<DNSName, uint16_t> >& operator+=(vector<pair<DNSName, uint16_t> >&a, const vector<pair<DNSName, uint16_t> >& b) |
2392 | { | |
2393 | a.insert(a.end(), b.begin(), b.end()); | |
2394 | return a; | |
2395 | } | |
2396 | ||
92011b8f | 2397 | |
13034931 | 2398 | template<class T> T broadcastAccFunction(const boost::function<T*()>& func, bool skipSelf) |
3427fa8a BH |
2399 | { |
2400 | unsigned int n = 0; | |
2401 | T ret=T(); | |
1dc8f4d0 | 2402 | for(ThreadPipeSet& tps : g_pipes) |
3427fa8a BH |
2403 | { |
2404 | if(n++ == t_id) { | |
2405 | if(!skipSelf) { | |
2406 | T* resp = (T*)func(); // don't write to ourselves! | |
2407 | if(resp) { | |
2408 | //~ cerr <<"got direct: " << *resp << endl; | |
2409 | ret += *resp; | |
2410 | delete resp; | |
2411 | } | |
2412 | } | |
2413 | continue; | |
2414 | } | |
3ddb9247 | 2415 | |
00c9b8c1 BH |
2416 | ThreadMSG* tmsg = new ThreadMSG(); |
2417 | tmsg->func = boost::bind(voider<T>, func); | |
2418 | tmsg->wantAnswer = true; | |
3ddb9247 | 2419 | |
b841314c RG |
2420 | if(write(tps.writeToThread, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) { |
2421 | delete tmsg; | |
3427fa8a | 2422 | unixDie("write to thread pipe returned wrong size or error"); |
b841314c | 2423 | } |
3ddb9247 | 2424 | |
3427fa8a BH |
2425 | T* resp; |
2426 | if(read(tps.readFromThread, &resp, sizeof(resp)) != sizeof(resp)) | |
2427 | unixDie("read from thread pipe returned wrong size or error"); | |
3ddb9247 | 2428 | |
3427fa8a BH |
2429 | if(resp) { |
2430 | //~ cerr <<"got response: " << *resp << endl; | |
2431 | ret += *resp; | |
2432 | delete resp; | |
2433 | } | |
2434 | } | |
2435 | return ret; | |
2436 | } | |
2437 | ||
13034931 BH |
2438 | template string broadcastAccFunction(const boost::function<string*()>& fun, bool skipSelf); // explicit instantiation |
2439 | template uint64_t broadcastAccFunction(const boost::function<uint64_t*()>& fun, bool skipSelf); // explicit instantiation | |
b3b5459d | 2440 | template vector<ComboAddress> broadcastAccFunction(const boost::function<vector<ComboAddress> *()>& fun, bool skipSelf); // explicit instantiation |
3ddb9247 | 2441 | template vector<pair<DNSName,uint16_t> > broadcastAccFunction(const boost::function<vector<pair<DNSName, uint16_t> > *()>& fun, bool skipSelf); // explicit instantiation |
3427fa8a | 2442 | |
d187038c | 2443 | static void handleRCC(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a BH |
2444 | { |
2445 | string remote; | |
2446 | string msg=s_rcc.recv(&remote); | |
2447 | RecursorControlParser rcp; | |
2448 | RecursorControlParser::func_t* command; | |
3ddb9247 | 2449 | |
09e6702a | 2450 | string answer=rcp.getAnswer(msg, &command); |
f0f3f0b0 PL |
2451 | |
2452 | // If we are inside a chroot, we need to strip | |
2453 | if (!arg()["chroot"].empty()) { | |
a683e8bd | 2454 | size_t len = arg()["chroot"].length(); |
f0f3f0b0 PL |
2455 | remote = remote.substr(len); |
2456 | } | |
2457 | ||
ab5c053d BH |
2458 | try { |
2459 | s_rcc.send(answer, &remote); | |
2460 | command(); | |
2461 | } | |
fdbf35ac | 2462 | catch(std::exception& e) { |
ab5c053d BH |
2463 | L<<Logger::Error<<"Error dealing with control socket request: "<<e.what()<<endl; |
2464 | } | |
3f81d239 | 2465 | catch(PDNSException& ae) { |
ab5c053d BH |
2466 | L<<Logger::Error<<"Error dealing with control socket request: "<<ae.reason<<endl; |
2467 | } | |
09e6702a BH |
2468 | } |
2469 | ||
d187038c | 2470 | static void handleTCPClientReadable(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 2471 | { |
0b18b22e | 2472 | PacketID* pident=any_cast<PacketID>(&var); |
667f7e60 | 2473 | // cerr<<"handleTCPClientReadable called for fd "<<fd<<", pident->inNeeded: "<<pident->inNeeded<<", "<<pident->sock->getHandle()<<endl; |
09e6702a | 2474 | |
667f7e60 | 2475 | shared_array<char> buffer(new char[pident->inNeeded]); |
09e6702a | 2476 | |
a683e8bd | 2477 | ssize_t ret=recv(fd, buffer.get(), pident->inNeeded,0); |
09e6702a | 2478 | if(ret > 0) { |
667f7e60 | 2479 | pident->inMSG.append(&buffer[0], &buffer[ret]); |
a683e8bd | 2480 | pident->inNeeded-=(size_t)ret; |
825fa717 | 2481 | if(!pident->inNeeded || pident->inIncompleteOkay) { |
667f7e60 BH |
2482 | // cerr<<"Got entire load of "<<pident->inMSG.size()<<" bytes"<<endl; |
2483 | PacketID pid=*pident; | |
2484 | string msg=pident->inMSG; | |
3ddb9247 | 2485 | |
bb4bdbaf | 2486 | t_fdm->removeReadFD(fd); |
3ddb9247 | 2487 | MT->sendEvent(pid, &msg); |
09e6702a BH |
2488 | } |
2489 | else { | |
667f7e60 | 2490 | // cerr<<"Still have "<<pident->inNeeded<<" left to go"<<endl; |
09e6702a BH |
2491 | } |
2492 | } | |
2493 | else { | |
667f7e60 | 2494 | PacketID tmp=*pident; |
bb4bdbaf | 2495 | t_fdm->removeReadFD(fd); // pident might now be invalid (it isn't, but still) |
09e6702a BH |
2496 | string empty; |
2497 | MT->sendEvent(tmp, &empty); // this conveys error status | |
2498 | } | |
2499 | } | |
2500 | ||
d187038c | 2501 | static void handleTCPClientWritable(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 2502 | { |
0b18b22e | 2503 | PacketID* pid=any_cast<PacketID>(&var); |
a683e8bd | 2504 | ssize_t ret=send(fd, pid->outMSG.c_str() + pid->outPos, pid->outMSG.size() - pid->outPos,0); |
09e6702a | 2505 | if(ret > 0) { |
a683e8bd | 2506 | pid->outPos+=(ssize_t)ret; |
667f7e60 BH |
2507 | if(pid->outPos==pid->outMSG.size()) { |
2508 | PacketID tmp=*pid; | |
bb4bdbaf | 2509 | t_fdm->removeWriteFD(fd); |
09e6702a BH |
2510 | MT->sendEvent(tmp, &tmp.outMSG); // send back what we sent to convey everything is ok |
2511 | } | |
2512 | } | |
2513 | else { // error or EOF | |
667f7e60 | 2514 | PacketID tmp(*pid); |
bb4bdbaf | 2515 | t_fdm->removeWriteFD(fd); |
09e6702a | 2516 | string sent; |
998a4334 | 2517 | MT->sendEvent(tmp, &sent); // we convey error status by sending empty string |
09e6702a BH |
2518 | } |
2519 | } | |
2520 | ||
34801ab1 | 2521 | // resend event to everybody chained onto it |
d187038c | 2522 | static void doResends(MT_t::waiters_t::iterator& iter, PacketID resend, const string& content) |
34801ab1 BH |
2523 | { |
2524 | if(iter->key.chain.empty()) | |
2525 | return; | |
e27e91a8 | 2526 | // cerr<<"doResends called!\n"; |
34801ab1 BH |
2527 | for(PacketID::chain_t::iterator i=iter->key.chain.begin(); i != iter->key.chain.end() ; ++i) { |
2528 | resend.fd=-1; | |
2529 | resend.id=*i; | |
e27e91a8 | 2530 | // cerr<<"\tResending "<<content.size()<<" bytes for fd="<<resend.fd<<" and id="<<resend.id<<endl; |
4665c31e | 2531 | |
34801ab1 BH |
2532 | MT->sendEvent(resend, &content); |
2533 | g_stats.chainResends++; | |
34801ab1 BH |
2534 | } |
2535 | } | |
2536 | ||
d187038c | 2537 | static void handleUDPServerResponse(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 2538 | { |
600fc20b | 2539 | PacketID pid=any_cast<PacketID>(var); |
a683e8bd | 2540 | ssize_t len; |
e45beeda | 2541 | char data[g_outgoingEDNSBufsize]; |
996c89cc | 2542 | ComboAddress fromaddr; |
09e6702a BH |
2543 | socklen_t addrlen=sizeof(fromaddr); |
2544 | ||
998a4334 | 2545 | len=recvfrom(fd, data, sizeof(data), 0, (sockaddr *)&fromaddr, &addrlen); |
c1da7976 | 2546 | |
a683e8bd | 2547 | if(len < (ssize_t) sizeof(dnsheader)) { |
998a4334 | 2548 | if(len < 0) |
996c89cc | 2549 | ; // cerr<<"Error on fd "<<fd<<": "<<stringerror()<<"\n"; |
09e6702a | 2550 | else { |
3ddb9247 | 2551 | g_stats.serverParseError++; |
09e6702a | 2552 | if(g_logCommonErrors) |
85db02c5 | 2553 | L<<Logger::Error<<"Unable to parse packet from remote UDP server "<< fromaddr.toString() << |
e44d9fa7 | 2554 | ": packet smaller than DNS header"<<endl; |
998a4334 | 2555 | } |
34801ab1 | 2556 | |
49a699c4 | 2557 | t_udpclientsocks->returnSocket(fd); |
34801ab1 BH |
2558 | string empty; |
2559 | ||
2560 | MT_t::waiters_t::iterator iter=MT->d_waiters.find(pid); | |
3ddb9247 | 2561 | if(iter != MT->d_waiters.end()) |
34801ab1 | 2562 | doResends(iter, pid, empty); |
3ddb9247 | 2563 | |
34801ab1 | 2564 | MT->sendEvent(pid, &empty); // this denotes error (does lookup again.. at least L1 will be hot) |
998a4334 | 2565 | return; |
3ddb9247 | 2566 | } |
998a4334 BH |
2567 | |
2568 | dnsheader dh; | |
2569 | memcpy(&dh, data, sizeof(dh)); | |
3ddb9247 | 2570 | |
6da3b3ad PD |
2571 | PacketID pident; |
2572 | pident.remote=fromaddr; | |
2573 | pident.id=dh.id; | |
2574 | pident.fd=fd; | |
34801ab1 | 2575 | |
33a928af | 2576 | if(!dh.qr && g_logCommonErrors) { |
854d44e3 | 2577 | L<<Logger::Notice<<"Not taking data from question on outgoing socket from "<< fromaddr.toStringWithPort() <<endl; |
6da3b3ad PD |
2578 | } |
2579 | ||
2580 | if(!dh.qdcount || // UPC, Nominum, very old BIND on FormErr, NSD | |
2581 | !dh.qr) { // one weird server | |
2582 | pident.domain.clear(); | |
2583 | pident.type = 0; | |
2584 | } | |
2585 | else { | |
2586 | try { | |
0b31e67e | 2587 | if(len > 12) |
2588 | pident.domain=DNSName(data, len, 12, false, &pident.type); // don't copy this from above - we need to do the actual read | |
6da3b3ad PD |
2589 | } |
2590 | catch(std::exception& e) { | |
2591 | g_stats.serverParseError++; // won't be fed to lwres.cc, so we have to increment | |
0b31e67e | 2592 | L<<Logger::Warning<<"Error in packet from remote nameserver "<< fromaddr.toStringWithPort() << ": "<<e.what() << endl; |
6da3b3ad | 2593 | return; |
34801ab1 | 2594 | } |
6da3b3ad PD |
2595 | } |
2596 | string packet; | |
2597 | packet.assign(data, len); | |
34801ab1 | 2598 | |
6da3b3ad PD |
2599 | MT_t::waiters_t::iterator iter=MT->d_waiters.find(pident); |
2600 | if(iter != MT->d_waiters.end()) { | |
2601 | doResends(iter, pident, packet); | |
2602 | } | |
c1da7976 | 2603 | |
6da3b3ad | 2604 | retryWithName: |
4957a608 | 2605 | |
6da3b3ad PD |
2606 | if(!MT->sendEvent(pident, &packet)) { |
2607 | // 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 | |
2608 | for(MT_t::waiters_t::iterator mthread=MT->d_waiters.begin(); mthread!=MT->d_waiters.end(); ++mthread) { | |
2609 | if(pident.fd==mthread->key.fd && mthread->key.remote==pident.remote && mthread->key.type == pident.type && | |
e325f20c | 2610 | pident.domain == mthread->key.domain) { |
6da3b3ad | 2611 | mthread->key.nearMisses++; |
998a4334 | 2612 | } |
6da3b3ad PD |
2613 | |
2614 | // be a bit paranoid here since we're weakening our matching | |
3ddb9247 | 2615 | if(pident.domain.empty() && !mthread->key.domain.empty() && !pident.type && mthread->key.type && |
6da3b3ad PD |
2616 | pident.id == mthread->key.id && mthread->key.remote == pident.remote) { |
2617 | // cerr<<"Empty response, rest matches though, sending to a waiter"<<endl; | |
2618 | pident.domain = mthread->key.domain; | |
2619 | pident.type = mthread->key.type; | |
2620 | goto retryWithName; // note that this only passes on an error, lwres will still reject the packet | |
d4fb76e9 | 2621 | } |
09e6702a | 2622 | } |
6da3b3ad PD |
2623 | g_stats.unexpectedCount++; // if we made it here, it really is an unexpected answer |
2624 | if(g_logCommonErrors) { | |
8a464ee3 | 2625 | 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 | 2626 | } |
09e6702a | 2627 | } |
6da3b3ad PD |
2628 | else if(fd >= 0) { |
2629 | t_udpclientsocks->returnSocket(fd); | |
2630 | } | |
09e6702a BH |
2631 | } |
2632 | ||
1f4abb20 BH |
2633 | FDMultiplexer* getMultiplexer() |
2634 | { | |
2635 | FDMultiplexer* ret; | |
f26bf547 | 2636 | for(const auto& i : FDMultiplexer::getMultiplexerMap()) { |
1f4abb20 | 2637 | try { |
f26bf547 | 2638 | ret=i.second(); |
1f4abb20 BH |
2639 | return ret; |
2640 | } | |
98d0ee4a | 2641 | catch(FDMultiplexerException &fe) { |
0a7f24cb | 2642 | L<<Logger::Error<<"Non-fatal error initializing possible multiplexer ("<<fe.what()<<"), falling back"<<endl; |
98d0ee4a BH |
2643 | } |
2644 | catch(...) { | |
2645 | L<<Logger::Error<<"Non-fatal error initializing possible multiplexer"<<endl; | |
2646 | } | |
1f4abb20 BH |
2647 | } |
2648 | L<<Logger::Error<<"No working multiplexer found!"<<endl; | |
2649 | exit(1); | |
2650 | } | |
2651 | ||
3ddb9247 | 2652 | |
d187038c | 2653 | static string* doReloadLuaScript() |
4485aa35 | 2654 | { |
674cf0f6 | 2655 | string fname= ::arg()["lua-dns-script"]; |
4485aa35 | 2656 | try { |
674cf0f6 | 2657 | if(fname.empty()) { |
f26bf547 | 2658 | t_pdl.reset(); |
674cf0f6 | 2659 | L<<Logger::Error<<t_id<<" Unloaded current lua script"<<endl; |
0f39c1a3 | 2660 | return new string("unloaded\n"); |
4485aa35 BH |
2661 | } |
2662 | else { | |
9694e14f AT |
2663 | t_pdl = std::make_shared<RecursorLua4>(); |
2664 | t_pdl->loadFile(fname); | |
4485aa35 BH |
2665 | } |
2666 | } | |
fdbf35ac | 2667 | catch(std::exception& e) { |
674cf0f6 | 2668 | L<<Logger::Error<<t_id<<" Retaining current script, error from '"<<fname<<"': "<< e.what() <<endl; |
0f39c1a3 | 2669 | return new string("retaining current script, error from '"+fname+"': "+e.what()+"\n"); |
4485aa35 | 2670 | } |
3ddb9247 | 2671 | |
674cf0f6 | 2672 | L<<Logger::Warning<<t_id<<" (Re)loaded lua script from '"<<fname<<"'"<<endl; |
0f39c1a3 | 2673 | return new string("(re)loaded '"+fname+"'\n"); |
4485aa35 BH |
2674 | } |
2675 | ||
49a699c4 BH |
2676 | string doQueueReloadLuaScript(vector<string>::const_iterator begin, vector<string>::const_iterator end) |
2677 | { | |
3ddb9247 | 2678 | if(begin != end) |
49a699c4 | 2679 | ::arg().set("lua-dns-script") = *begin; |
3ddb9247 | 2680 | |
0f39c1a3 | 2681 | return broadcastAccFunction<string>(doReloadLuaScript); |
3ddb9247 | 2682 | } |
49a699c4 | 2683 | |
d187038c | 2684 | static string* pleaseUseNewTraceRegex(const std::string& newRegex) |
77499b05 BH |
2685 | try |
2686 | { | |
2687 | if(newRegex.empty()) { | |
f26bf547 | 2688 | t_traceRegex.reset(); |
77499b05 BH |
2689 | return new string("unset\n"); |
2690 | } | |
2691 | else { | |
f26bf547 | 2692 | t_traceRegex = std::make_shared<Regex>(newRegex); |
77499b05 BH |
2693 | return new string("ok\n"); |
2694 | } | |
2695 | } | |
3f81d239 | 2696 | catch(PDNSException& ae) |
77499b05 BH |
2697 | { |
2698 | return new string(ae.reason+"\n"); | |
2699 | } | |
2700 | ||
2701 | string doTraceRegex(vector<string>::const_iterator begin, vector<string>::const_iterator end) | |
2702 | { | |
2703 | return broadcastAccFunction<string>(boost::bind(pleaseUseNewTraceRegex, begin!=end ? *begin : "")); | |
2704 | } | |
2705 | ||
4e9a20e6 | 2706 | static void checkLinuxIPv6Limits() |
2707 | { | |
2708 | #ifdef __linux__ | |
2709 | string line; | |
2710 | if(readFileIfThere("/proc/sys/net/ipv6/route/max_size", &line)) { | |
335da0ba | 2711 | int lim=std::stoi(line); |
4e9a20e6 | 2712 | if(lim < 16384) { |
36849ff2 | 2713 | L<<Logger::Error<<"If using IPv6, please raise sysctl net.ipv6.route.max_size, currently set to "<<lim<<" which is < 16384"<<endl; |
4e9a20e6 | 2714 | } |
2715 | } | |
2716 | #endif | |
2717 | } | |
36849ff2 | 2718 | static void checkOrFixFDS() |
4e9a20e6 | 2719 | { |
c0063e60 | 2720 | unsigned int availFDs=getFilenumLimit(); |
2721 | unsigned int wantFDs = g_maxMThreads * g_numWorkerThreads +25; // even healthier margin then before | |
2722 | ||
2723 | if(wantFDs > availFDs) { | |
067ad20e | 2724 | unsigned int hardlimit= getFilenumLimit(true); |
2725 | if(hardlimit >= wantFDs) { | |
c0063e60 | 2726 | setFilenumLimit(wantFDs); |
2727 | L<<Logger::Warning<<"Raised soft limit on number of filedescriptors to "<<wantFDs<<" to match max-mthreads and threads settings"<<endl; | |
36849ff2 | 2728 | } |
2729 | else { | |
067ad20e | 2730 | int newval = (hardlimit - 25) / g_numWorkerThreads; |
2731 | L<<Logger::Warning<<"Insufficient number of filedescriptors available for max-mthreads*threads setting! ("<<hardlimit<<" < "<<wantFDs<<"), reducing max-mthreads to "<<newval<<endl; | |
36849ff2 | 2732 | g_maxMThreads = newval; |
067ad20e | 2733 | setFilenumLimit(hardlimit); |
36849ff2 | 2734 | } |
2735 | } | |
4e9a20e6 | 2736 | } |
77499b05 | 2737 | |
d187038c | 2738 | static void* recursorThread(void*); |
51e2144e | 2739 | |
f26bf547 | 2740 | static void* pleaseSupplantACLs(std::shared_ptr<NetmaskGroup> ng) |
49a699c4 BH |
2741 | { |
2742 | t_allowFrom = ng; | |
f26bf547 | 2743 | return nullptr; |
49a699c4 BH |
2744 | } |
2745 | ||
dbd23fc2 BH |
2746 | int g_argc; |
2747 | char** g_argv; | |
2748 | ||
18af64a8 | 2749 | void parseACLs() |
f7c1d4e3 | 2750 | { |
18af64a8 | 2751 | static bool l_initialized; |
3ddb9247 | 2752 | |
49a699c4 | 2753 | if(l_initialized) { // only reload configuration file on second call |
18af64a8 | 2754 | string configname=::arg()["config-dir"]+"/recursor.conf"; |
3e63da83 JR |
2755 | if(::arg()["config-name"]!="") { |
2756 | configname=::arg()["config-dir"]+"/recursor-"+::arg()["config-name"]+".conf"; | |
2757 | } | |
18af64a8 | 2758 | cleanSlashes(configname); |
3ddb9247 PD |
2759 | |
2760 | if(!::arg().preParseFile(configname.c_str(), "allow-from-file")) | |
7e818521 | 2761 | throw runtime_error("Unable to re-parse configuration file '"+configname+"'"); |
49a699c4 | 2762 | ::arg().preParseFile(configname.c_str(), "allow-from", LOCAL_NETS); |
242b90e1 | 2763 | ::arg().preParseFile(configname.c_str(), "include-dir"); |
829849d6 AT |
2764 | ::arg().preParse(g_argc, g_argv, "include-dir"); |
2765 | ||
2766 | // then process includes | |
2767 | std::vector<std::string> extraConfigs; | |
242b90e1 AT |
2768 | ::arg().gatherIncludes(extraConfigs); |
2769 | ||
1dc8f4d0 | 2770 | for(const std::string& fn : extraConfigs) { |
7e818521 | 2771 | if(!::arg().preParseFile(fn.c_str(), "allow-from-file", ::arg()["allow-from-file"])) |
2772 | throw runtime_error("Unable to re-parse configuration file include '"+fn+"'"); | |
2773 | if(!::arg().preParseFile(fn.c_str(), "allow-from", ::arg()["allow-from"])) | |
2774 | throw runtime_error("Unable to re-parse configuration file include '"+fn+"'"); | |
829849d6 | 2775 | } |
ca2c884c AT |
2776 | |
2777 | ::arg().preParse(g_argc, g_argv, "allow-from-file"); | |
2778 | ::arg().preParse(g_argc, g_argv, "allow-from"); | |
f27e6356 | 2779 | } |
49a699c4 | 2780 | |
f26bf547 RG |
2781 | std::shared_ptr<NetmaskGroup> oldAllowFrom = t_allowFrom; |
2782 | std::shared_ptr<NetmaskGroup> allowFrom = std::make_shared<NetmaskGroup>(); | |
3ddb9247 | 2783 | |
2c95fc65 BH |
2784 | if(!::arg()["allow-from-file"].empty()) { |
2785 | string line; | |
2c95fc65 BH |
2786 | ifstream ifs(::arg()["allow-from-file"].c_str()); |
2787 | if(!ifs) { | |
9c61b9d0 | 2788 | throw runtime_error("Could not open '"+::arg()["allow-from-file"]+"': "+stringerror()); |
2c95fc65 BH |
2789 | } |
2790 | ||
2791 | string::size_type pos; | |
2792 | while(getline(ifs,line)) { | |
2793 | pos=line.find('#'); | |
2794 | if(pos!=string::npos) | |
2795 | line.resize(pos); | |
2796 | trim(line); | |
2797 | if(line.empty()) | |
2798 | continue; | |
2799 | ||
18af64a8 | 2800 | allowFrom->addMask(line); |
2c95fc65 | 2801 | } |
49a699c4 | 2802 | L<<Logger::Warning<<"Done parsing " << allowFrom->size() <<" allow-from ranges from file '"<<::arg()["allow-from-file"]<<"' - overriding 'allow-from' setting"<<endl; |
2c95fc65 BH |
2803 | } |
2804 | else if(!::arg()["allow-from"].empty()) { | |
f7c1d4e3 BH |
2805 | vector<string> ips; |
2806 | stringtok(ips, ::arg()["allow-from"], ", "); | |
3ddb9247 | 2807 | |
f7c1d4e3 BH |
2808 | L<<Logger::Warning<<"Only allowing queries from: "; |
2809 | for(vector<string>::const_iterator i = ips.begin(); i!= ips.end(); ++i) { | |
18af64a8 | 2810 | allowFrom->addMask(*i); |
f7c1d4e3 | 2811 | if(i!=ips.begin()) |
674cf0f6 | 2812 | L<<Logger::Warning<<", "; |
f7c1d4e3 BH |
2813 | L<<Logger::Warning<<*i; |
2814 | } | |
2815 | L<<Logger::Warning<<endl; | |
2816 | } | |
49a699c4 | 2817 | else { |
3ddb9247 | 2818 | if(::arg()["local-address"]!="127.0.0.1" && ::arg().asNum("local-port")==53) |
49a699c4 | 2819 | L<<Logger::Error<<"WARNING: Allowing queries from all IP addresses - this can be a security risk!"<<endl; |
f26bf547 | 2820 | allowFrom = nullptr; |
49a699c4 | 2821 | } |
3ddb9247 | 2822 | |
49a699c4 | 2823 | g_initialAllowFrom = allowFrom; |
d7dae798 | 2824 | broadcastFunction(boost::bind(pleaseSupplantACLs, allowFrom)); |
f26bf547 | 2825 | oldAllowFrom = nullptr; |
3ddb9247 | 2826 | |
49a699c4 | 2827 | l_initialized = true; |
18af64a8 BH |
2828 | } |
2829 | ||
795215f2 | 2830 | |
756e82cf | 2831 | static void setupDelegationOnly() |
2832 | { | |
2833 | vector<string> parts; | |
2834 | stringtok(parts, ::arg()["delegation-only"], ", \t"); | |
2835 | for(const auto& p : parts) { | |
9065eb05 | 2836 | SyncRes::addDelegationOnly(DNSName(p)); |
756e82cf | 2837 | } |
2838 | } | |
795215f2 | 2839 | |
8fd25133 RG |
2840 | static std::map<unsigned int, std::set<int> > parseCPUMap() |
2841 | { | |
2842 | std::map<unsigned int, std::set<int> > result; | |
2843 | ||
2844 | const std::string value = ::arg()["cpu-map"]; | |
2845 | ||
2846 | if (!value.empty() && !isSettingThreadCPUAffinitySupported()) { | |
2847 | L<<Logger::Warning<<"CPU mapping requested but not supported, skipping"<<endl; | |
2848 | return result; | |
2849 | } | |
2850 | ||
2851 | std::vector<std::string> parts; | |
2852 | ||
2853 | stringtok(parts, value, " \t"); | |
2854 | ||
2855 | for(const auto& part : parts) { | |
2856 | if (part.find('=') == string::npos) | |
2857 | continue; | |
2858 | ||
2859 | try { | |
2860 | auto headers = splitField(part, '='); | |
2861 | trim(headers.first); | |
2862 | trim(headers.second); | |
2863 | ||
2864 | unsigned int threadId = pdns_stou(headers.first); | |
2865 | std::vector<std::string> cpus; | |
2866 | ||
2867 | stringtok(cpus, headers.second, ","); | |
2868 | ||
2869 | for(const auto& cpu : cpus) { | |
2870 | int cpuId = std::stoi(cpu); | |
2871 | ||
2872 | result[threadId].insert(cpuId); | |
2873 | } | |
2874 | } | |
2875 | catch(const std::exception& e) { | |
2876 | L<<Logger::Error<<"Error parsing cpu-map entry '"<<part<<"': "<<e.what()<<endl; | |
2877 | } | |
2878 | } | |
2879 | ||
2880 | return result; | |
2881 | } | |
2882 | ||
2883 | static void setCPUMap(const std::map<unsigned int, std::set<int> >& cpusMap, unsigned int n, pthread_t tid) | |
2884 | { | |
2885 | const auto& cpuMapping = cpusMap.find(n); | |
2886 | if (cpuMapping != cpusMap.cend()) { | |
2887 | int rc = mapThreadToCPUList(tid, cpuMapping->second); | |
2888 | if (rc == 0) { | |
2889 | L<<Logger::Info<<"CPU affinity for worker "<<n<<" has been set to CPU map:"; | |
2890 | for (const auto cpu : cpuMapping->second) { | |
2891 | L<<Logger::Info<<" "<<cpu; | |
2892 | } | |
2893 | L<<Logger::Info<<endl; | |
2894 | } | |
2895 | else { | |
2896 | L<<Logger::Warning<<"Error setting CPU affinity for worker "<<n<<" to CPU map:"; | |
2897 | for (const auto cpu : cpuMapping->second) { | |
2898 | L<<Logger::Info<<" "<<cpu; | |
2899 | } | |
2900 | L<<Logger::Info<<strerror(rc)<<endl; | |
2901 | } | |
2902 | } | |
2903 | } | |
2904 | ||
d187038c | 2905 | static int serviceMain(int argc, char*argv[]) |
18af64a8 | 2906 | { |
5124de27 | 2907 | L.setName(s_programname); |
b6cfa948 | 2908 | L.disableSyslog(::arg().mustDo("disable-syslog")); |
b18fa400 | 2909 | L.setTimestamps(::arg().mustDo("log-timestamp")); |
18af64a8 BH |
2910 | |
2911 | if(!::arg()["logging-facility"].empty()) { | |
f8499e52 BH |
2912 | int val=logFacilityToLOG(::arg().asNum("logging-facility") ); |
2913 | if(val >= 0) | |
2914 | theL().setFacility(val); | |
18af64a8 BH |
2915 | else |
2916 | L<<Logger::Error<<"Unknown logging facility "<<::arg().asNum("logging-facility") <<endl; | |
2917 | } | |
2918 | ||
ba1a571d | 2919 | showProductVersion(); |
18af64a8 | 2920 | seedRandom(::arg()["entropy-source"]); |
3afde9b2 | 2921 | |
06ea9015 | 2922 | g_disthashseed=dns_random(0xffffffff); |
2923 | ||
b7ef5828 PL |
2924 | checkLinuxIPv6Limits(); |
2925 | try { | |
2926 | vector<string> addrs; | |
2927 | if(!::arg()["query-local-address6"].empty()) { | |
2928 | SyncRes::s_doIPv6=true; | |
2929 | L<<Logger::Warning<<"Enabling IPv6 transport for outgoing queries"<<endl; | |
2930 | ||
2931 | stringtok(addrs, ::arg()["query-local-address6"], ", ;"); | |
2932 | for(const string& addr : addrs) { | |
2933 | g_localQueryAddresses6.push_back(ComboAddress(addr)); | |
2934 | } | |
2935 | } | |
2936 | else { | |
2937 | L<<Logger::Warning<<"NOT using IPv6 for outgoing queries - set 'query-local-address6=::' to enable"<<endl; | |
2938 | } | |
2939 | addrs.clear(); | |
2940 | stringtok(addrs, ::arg()["query-local-address"], ", ;"); | |
2941 | for(const string& addr : addrs) { | |
2942 | g_localQueryAddresses4.push_back(ComboAddress(addr)); | |
2943 | } | |
2944 | } | |
2945 | catch(std::exception& e) { | |
2946 | L<<Logger::Error<<"Assigning local query addresses: "<<e.what(); | |
2947 | exit(99); | |
2948 | } | |
2949 | ||
e48c6b8a PL |
2950 | // keep this ABOVE loadRecursorLuaConfig! |
2951 | if(::arg()["dnssec"]=="off") | |
2952 | g_dnssecmode=DNSSECMode::Off; | |
2953 | else if(::arg()["dnssec"]=="process-no-validate") | |
2954 | g_dnssecmode=DNSSECMode::ProcessNoValidate; | |
2955 | else if(::arg()["dnssec"]=="process") | |
2956 | g_dnssecmode=DNSSECMode::Process; | |
2957 | else if(::arg()["dnssec"]=="validate") | |
2958 | g_dnssecmode=DNSSECMode::ValidateAll; | |
2959 | else if(::arg()["dnssec"]=="log-fail") | |
2960 | g_dnssecmode=DNSSECMode::ValidateForLog; | |
2961 | else { | |
2962 | L<<Logger::Error<<"Unknown DNSSEC mode "<<::arg()["dnssec"]<<endl; | |
2963 | exit(1); | |
2964 | } | |
2965 | ||
2966 | g_dnssecLogBogus = ::arg().mustDo("dnssec-log-bogus"); | |
d377bb54 | 2967 | g_maxNSEC3Iterations = ::arg().asNum("nsec3-max-iterations"); |
e48c6b8a | 2968 | |
a6f7f5fe | 2969 | g_maxCacheEntries = ::arg().asNum("max-cache-entries"); |
2970 | g_maxPacketCacheEntries = ::arg().asNum("max-packetcache-entries"); | |
2971 | ||
0f5785a6 PL |
2972 | try { |
2973 | loadRecursorLuaConfig(::arg()["lua-config-file"], ::arg().mustDo("daemon")); | |
2974 | } | |
2975 | catch (PDNSException &e) { | |
2976 | L<<Logger::Error<<"Cannot load Lua configuration: "<<e.reason<<endl; | |
2977 | exit(1); | |
2978 | } | |
ad42489c | 2979 | |
18af64a8 | 2980 | parseACLs(); |
92011b8f | 2981 | sortPublicSuffixList(); |
2982 | ||
eb5bae86 | 2983 | if(!::arg()["dont-query"].empty()) { |
eb5bae86 BH |
2984 | vector<string> ips; |
2985 | stringtok(ips, ::arg()["dont-query"], ", "); | |
66e0b6ea BH |
2986 | ips.push_back("0.0.0.0"); |
2987 | ips.push_back("::"); | |
c36bc97a | 2988 | |
eb5bae86 BH |
2989 | L<<Logger::Warning<<"Will not send queries to: "; |
2990 | for(vector<string>::const_iterator i = ips.begin(); i!= ips.end(); ++i) { | |
9065eb05 | 2991 | SyncRes::addDontQuery(*i); |
eb5bae86 | 2992 | if(i!=ips.begin()) |
4957a608 | 2993 | L<<Logger::Warning<<", "; |
eb5bae86 BH |
2994 | L<<Logger::Warning<<*i; |
2995 | } | |
2996 | L<<Logger::Warning<<endl; | |
2997 | } | |
2998 | ||
f7c1d4e3 | 2999 | g_quiet=::arg().mustDo("quiet"); |
3ddb9247 | 3000 | |
1bc3c142 BH |
3001 | g_weDistributeQueries = ::arg().mustDo("pdns-distributes-queries"); |
3002 | if(g_weDistributeQueries) { | |
3003 | L<<Logger::Warning<<"PowerDNS Recursor itself will distribute queries over threads"<<endl; | |
3004 | } | |
3ddb9247 | 3005 | |
756e82cf | 3006 | setupDelegationOnly(); |
b33c2462 | 3007 | g_outgoingEDNSBufsize=::arg().asNum("edns-outgoing-bufsize"); |
756e82cf | 3008 | |
77499b05 BH |
3009 | if(::arg()["trace"]=="fail") { |
3010 | SyncRes::setDefaultLogMode(SyncRes::Store); | |
3011 | } | |
3012 | else if(::arg().mustDo("trace")) { | |
3013 | SyncRes::setDefaultLogMode(SyncRes::Log); | |
f7c1d4e3 BH |
3014 | ::arg().set("quiet")="no"; |
3015 | g_quiet=false; | |
3e9c6c0a | 3016 | g_dnssecLOG=true; |
f7c1d4e3 | 3017 | } |
3ddb9247 | 3018 | |
aadceba8 | 3019 | SyncRes::s_minimumTTL = ::arg().asNum("minimum-ttl-override"); |
3020 | ||
1051f8a9 BH |
3021 | SyncRes::s_nopacketcache = ::arg().mustDo("disable-packetcache"); |
3022 | ||
f7c1d4e3 | 3023 | SyncRes::s_maxnegttl=::arg().asNum("max-negative-ttl"); |
63637fd8 | 3024 | SyncRes::s_maxcachettl=max(::arg().asNum("max-cache-ttl"), 15); |
1051f8a9 | 3025 | SyncRes::s_packetcachettl=::arg().asNum("packetcache-ttl"); |
79ec0627 PL |
3026 | // Cap the packetcache-servfail-ttl to the packetcache-ttl |
3027 | uint32_t packetCacheServFailTTL = ::arg().asNum("packetcache-servfail-ttl"); | |
3028 | SyncRes::s_packetcacheservfailttl=(packetCacheServFailTTL > SyncRes::s_packetcachettl) ? SyncRes::s_packetcachettl : packetCacheServFailTTL; | |
628e2c7b PA |
3029 | SyncRes::s_serverdownmaxfails=::arg().asNum("server-down-max-fails"); |
3030 | SyncRes::s_serverdownthrottletime=::arg().asNum("server-down-throttle-time"); | |
f7c1d4e3 | 3031 | SyncRes::s_serverID=::arg()["server-id"]; |
173d790e | 3032 | SyncRes::s_maxqperq=::arg().asNum("max-qperq"); |
9de3e034 | 3033 | SyncRes::s_maxtotusec=1000*::arg().asNum("max-total-msec"); |
7c3398aa | 3034 | SyncRes::s_maxdepth=::arg().asNum("max-recursion-depth"); |
01402d56 | 3035 | SyncRes::s_rootNXTrust = ::arg().mustDo( "root-nx-trust"); |
f7c1d4e3 BH |
3036 | if(SyncRes::s_serverID.empty()) { |
3037 | char tmp[128]; | |
3038 | gethostname(tmp, sizeof(tmp)-1); | |
3039 | SyncRes::s_serverID=tmp; | |
3040 | } | |
3ddb9247 | 3041 | |
e9f9b8ec RG |
3042 | SyncRes::s_ecsipv4limit = ::arg().asNum("ecs-ipv4-bits"); |
3043 | SyncRes::s_ecsipv6limit = ::arg().asNum("ecs-ipv6-bits"); | |
3044 | ||
8a3a3822 RG |
3045 | if (!::arg().isEmpty("ecs-scope-zero-address")) { |
3046 | ComboAddress scopeZero(::arg()["ecs-scope-zero-address"]); | |
3047 | SyncRes::setECSScopeZeroAddress(Netmask(scopeZero, scopeZero.isIPv4() ? 32 : 128)); | |
3048 | } | |
3049 | else { | |
3050 | bool found = false; | |
3051 | for (const auto& addr : g_localQueryAddresses4) { | |
3052 | if (!IsAnyAddress(addr)) { | |
3053 | SyncRes::setECSScopeZeroAddress(Netmask(addr, 32)); | |
3054 | found = true; | |
3055 | break; | |
3056 | } | |
3057 | } | |
3058 | if (!found) { | |
3059 | for (const auto& addr : g_localQueryAddresses6) { | |
3060 | if (!IsAnyAddress(addr)) { | |
3061 | SyncRes::setECSScopeZeroAddress(Netmask(addr, 128)); | |
3062 | found = true; | |
3063 | break; | |
3064 | } | |
3065 | } | |
3066 | if (!found) { | |
3067 | SyncRes::setECSScopeZeroAddress(Netmask("127.0.0.1/32")); | |
3068 | } | |
3069 | } | |
3070 | } | |
3071 | ||
2fe3354d CH |
3072 | SyncRes::parseEDNSSubnetWhitelist(::arg()["edns-subnet-whitelist"]); |
3073 | SyncRes::parseEDNSSubnetAddFor(::arg()["ecs-add-for"]); | |
3074 | g_useIncomingECS = ::arg().mustDo("use-incoming-edns-subnet"); | |
3075 | ||
5cc8371b | 3076 | g_XPFAcl.toMasks(::arg()["xpf-allow-from"]); |
59cb4a79 | 3077 | g_xpfRRCode = ::arg().asNum("xpf-rr-code"); |
5cc8371b | 3078 | |
5b0ddd18 | 3079 | g_networkTimeoutMsec = ::arg().asNum("network-timeout"); |
bb4bdbaf | 3080 | |
49a699c4 | 3081 | g_initialDomainMap = parseAuthAndForwards(); |
3ddb9247 | 3082 | |
08f3f638 | 3083 | g_latencyStatSize=::arg().asNum("latency-statistic-size"); |
3ddb9247 | 3084 | |
f7c1d4e3 | 3085 | g_logCommonErrors=::arg().mustDo("log-common-errors"); |
98d36505 | 3086 | g_logRPZChanges = ::arg().mustDo("log-rpz-changes"); |
e661a20b PD |
3087 | |
3088 | g_anyToTcp = ::arg().mustDo("any-to-tcp"); | |
a09a8ce0 PD |
3089 | g_udpTruncationThreshold = ::arg().asNum("udp-truncation-threshold"); |
3090 | ||
b3adda56 PD |
3091 | g_lowercaseOutgoing = ::arg().mustDo("lowercase-outgoing"); |
3092 | ||
810ff705 | 3093 | g_numWorkerThreads = ::arg().asNum("threads"); |
1c4f2e1b RG |
3094 | if (g_numWorkerThreads < 1) { |
3095 | L<<Logger::Warning<<"Asked to run with 0 threads, raising to 1 instead"<<endl; | |
3096 | g_numWorkerThreads = 1; | |
3097 | } | |
3098 | ||
810ff705 RG |
3099 | g_numThreads = g_numWorkerThreads + g_weDistributeQueries; |
3100 | g_maxMThreads = ::arg().asNum("max-mthreads"); | |
3101 | ||
00b8cadc RG |
3102 | g_gettagNeedsEDNSOptions = ::arg().mustDo("gettag-needs-edns-options"); |
3103 | ||
0ec489bf | 3104 | g_statisticsInterval = ::arg().asNum("statistics-interval"); |
3105 | ||
810ff705 RG |
3106 | #ifdef SO_REUSEPORT |
3107 | g_reusePort = ::arg().mustDo("reuseport"); | |
3108 | #endif | |
3109 | ||
3110 | g_useOneSocketPerThread = (!g_weDistributeQueries && g_reusePort); | |
3111 | ||
3112 | if (g_useOneSocketPerThread) { | |
3113 | for (unsigned int threadId = 0; threadId < g_numWorkerThreads; threadId++) { | |
3114 | makeUDPServerSockets(threadId); | |
3115 | makeTCPServerSockets(threadId); | |
3116 | } | |
3117 | } | |
3118 | else { | |
3119 | makeUDPServerSockets(0); | |
3120 | makeTCPServerSockets(0); | |
3121 | } | |
815099b2 | 3122 | |
677e2a46 BH |
3123 | int forks; |
3124 | for(forks = 0; forks < ::arg().asNum("processes") - 1; ++forks) { | |
1bc3c142 BH |
3125 | if(!fork()) // we are child |
3126 | break; | |
3127 | } | |
3ddb9247 | 3128 | |
f7c1d4e3 BH |
3129 | if(::arg().mustDo("daemon")) { |
3130 | L<<Logger::Warning<<"Calling daemonize, going to background"<<endl; | |
3131 | L.toConsole(Logger::Critical); | |
f7c1d4e3 | 3132 | daemonize(); |
a4241908 | 3133 | loadRecursorLuaConfig(::arg()["lua-config-file"], false); |
f7c1d4e3 BH |
3134 | } |
3135 | signal(SIGUSR1,usr1Handler); | |
3136 | signal(SIGUSR2,usr2Handler); | |
3137 | signal(SIGPIPE,SIG_IGN); | |
810ff705 | 3138 | |
a6414fdc | 3139 | checkOrFixFDS(); |
3ddb9247 | 3140 | |
d1b28475 KM |
3141 | #ifdef HAVE_LIBSODIUM |
3142 | if (sodium_init() == -1) { | |
3143 | L<<Logger::Error<<"Unable to initialize sodium crypto library"<<endl; | |
3144 | exit(99); | |
3145 | } | |
3146 | #endif | |
3147 | ||
3afde9b2 PL |
3148 | openssl_thread_setup(); |
3149 | openssl_seed(); | |
3150 | ||
138435cb BH |
3151 | int newgid=0; |
3152 | if(!::arg()["setgid"].empty()) | |
3153 | newgid=Utility::makeGidNumeric(::arg()["setgid"]); | |
3154 | int newuid=0; | |
3155 | if(!::arg()["setuid"].empty()) | |
3156 | newuid=Utility::makeUidNumeric(::arg()["setuid"]); | |
3157 | ||
f1d6a7ce KM |
3158 | Utility::dropGroupPrivs(newuid, newgid); |
3159 | ||
138435cb | 3160 | if (!::arg()["chroot"].empty()) { |
75336810 PL |
3161 | #ifdef HAVE_SYSTEMD |
3162 | char *ns; | |
3163 | ns = getenv("NOTIFY_SOCKET"); | |
3164 | if (ns != nullptr) { | |
3165 | L<<Logger::Error<<"Unable to chroot when running from systemd. Please disable chroot= or set the 'Type' for this service to 'simple'"<<endl; | |
3166 | exit(1); | |
3167 | } | |
3168 | #endif | |
138435cb BH |
3169 | if (chroot(::arg()["chroot"].c_str())<0 || chdir("/") < 0) { |
3170 | L<<Logger::Error<<"Unable to chroot to '"+::arg()["chroot"]+"': "<<strerror (errno)<<", exiting"<<endl; | |
3171 | exit(1); | |
3172 | } | |
f0f3f0b0 PL |
3173 | else |
3174 | L<<Logger::Error<<"Chrooted to '"<<::arg()["chroot"]<<"'"<<endl; | |
138435cb BH |
3175 | } |
3176 | ||
f0f3f0b0 PL |
3177 | s_pidfname=::arg()["socket-dir"]+"/"+s_programname+".pid"; |
3178 | if(!s_pidfname.empty()) | |
3179 | unlink(s_pidfname.c_str()); // remove possible old pid file | |
3180 | writePid(); | |
3181 | ||
3182 | makeControlChannelSocket( ::arg().asNum("processes") > 1 ? forks : -1); | |
3183 | ||
f1d6a7ce | 3184 | Utility::dropUserPrivs(newuid); |
c0063e60 | 3185 | |
49a699c4 | 3186 | makeThreadPipes(); |
3ddb9247 | 3187 | |
5d4dd7fe BH |
3188 | g_tcpTimeout=::arg().asNum("client-tcp-timeout"); |
3189 | g_maxTCPPerClient=::arg().asNum("max-tcp-per-client"); | |
fde296a3 | 3190 | g_tcpMaxQueriesPerConn=::arg().asNum("max-tcp-queries-per-connection"); |
343257a4 | 3191 | |
d705aad9 RG |
3192 | if (::arg().mustDo("snmp-agent")) { |
3193 | g_snmpAgent = std::make_shared<RecursorSNMPAgent>("recursor", ::arg()["snmp-master-socket"]); | |
3194 | g_snmpAgent->run(); | |
3195 | } | |
3196 | ||
8fd25133 | 3197 | const auto cpusMap = parseCPUMap(); |
c3828c03 | 3198 | if(g_numThreads == 1) { |
76698c6e | 3199 | L<<Logger::Warning<<"Operating unthreaded"<<endl; |
6b6720de PL |
3200 | #ifdef HAVE_SYSTEMD |
3201 | sd_notify(0, "READY=1"); | |
3202 | #endif | |
8fd25133 | 3203 | setCPUMap(cpusMap, 0, pthread_self()); |
76698c6e BH |
3204 | recursorThread(0); |
3205 | } | |
3206 | else { | |
3207 | pthread_t tid; | |
c3828c03 BH |
3208 | L<<Logger::Warning<<"Launching "<< g_numThreads <<" threads"<<endl; |
3209 | for(unsigned int n=0; n < g_numThreads; ++n) { | |
77499b05 | 3210 | pthread_create(&tid, 0, recursorThread, (void*)(long)n); |
8fd25133 RG |
3211 | |
3212 | setCPUMap(cpusMap, n, tid); | |
76698c6e BH |
3213 | } |
3214 | void* res; | |
6b6720de PL |
3215 | #ifdef HAVE_SYSTEMD |
3216 | sd_notify(0, "READY=1"); | |
3217 | #endif | |
76698c6e | 3218 | pthread_join(tid, &res); |
bb4bdbaf | 3219 | } |
bb4bdbaf BH |
3220 | return 0; |
3221 | } | |
3222 | ||
d187038c | 3223 | static void* recursorThread(void* ptr) |
bb4bdbaf BH |
3224 | try |
3225 | { | |
2e2cd8ec | 3226 | t_id=(int) (long) ptr; |
49a699c4 | 3227 | SyncRes tmp(g_now); // make sure it allocates tsstorage before we do anything, like primeHints or so.. |
a712cb56 | 3228 | SyncRes::setDomainMap(g_initialDomainMap); |
49a699c4 | 3229 | t_allowFrom = g_initialAllowFrom; |
f26bf547 RG |
3230 | t_udpclientsocks = std::unique_ptr<UDPClientSocks>(new UDPClientSocks()); |
3231 | t_tcpClientCounts = std::unique_ptr<tcpClientCounts_t>(new tcpClientCounts_t()); | |
49a699c4 | 3232 | primeHints(); |
3ddb9247 | 3233 | |
f26bf547 | 3234 | t_packetCache = std::unique_ptr<RecursorPacketCache>(new RecursorPacketCache()); |
3ddb9247 | 3235 | |
aa7929a3 | 3236 | #ifdef HAVE_PROTOBUF |
f26bf547 | 3237 | t_uuidGenerator = std::unique_ptr<boost::uuids::random_generator>(new boost::uuids::random_generator()); |
aa7929a3 | 3238 | #endif |
49a699c4 | 3239 | L<<Logger::Warning<<"Done priming cache with root hints"<<endl; |
3ddb9247 | 3240 | |
674cf0f6 BH |
3241 | try { |
3242 | if(!::arg()["lua-dns-script"].empty()) { | |
9694e14f AT |
3243 | t_pdl = std::make_shared<RecursorLua4>(); |
3244 | t_pdl->loadFile(::arg()["lua-dns-script"]); | |
674cf0f6 BH |
3245 | L<<Logger::Warning<<"Loaded 'lua' script from '"<<::arg()["lua-dns-script"]<<"'"<<endl; |
3246 | } | |
674cf0f6 BH |
3247 | } |
3248 | catch(std::exception &e) { | |
3249 | L<<Logger::Error<<"Failed to load 'lua' script from '"<<::arg()["lua-dns-script"]<<"': "<<e.what()<<endl; | |
62f0ae62 | 3250 | _exit(99); |
674cf0f6 | 3251 | } |
3ddb9247 | 3252 | |
f8f243b0 | 3253 | unsigned int ringsize=::arg().asNum("stats-ringbuffer-entries") / g_numWorkerThreads; |
92011b8f | 3254 | if(ringsize) { |
f26bf547 | 3255 | t_remotes = std::unique_ptr<addrringbuf_t>(new addrringbuf_t()); |
f8f243b0 | 3256 | if(g_weDistributeQueries) // if so, only 1 thread does recvfrom |
3ddb9247 | 3257 | t_remotes->set_capacity(::arg().asNum("stats-ringbuffer-entries")); |
f8f243b0 | 3258 | else |
3ddb9247 | 3259 | t_remotes->set_capacity(ringsize); |
f26bf547 | 3260 | t_servfailremotes = std::unique_ptr<addrringbuf_t>(new addrringbuf_t()); |
3ddb9247 | 3261 | t_servfailremotes->set_capacity(ringsize); |
f26bf547 | 3262 | t_largeanswerremotes = std::unique_ptr<addrringbuf_t>(new addrringbuf_t()); |
3ddb9247 | 3263 | t_largeanswerremotes->set_capacity(ringsize); |
92011b8f | 3264 | |
f26bf547 | 3265 | t_queryring = std::unique_ptr<boost::circular_buffer<pair<DNSName, uint16_t> > >(new boost::circular_buffer<pair<DNSName, uint16_t> >()); |
3ddb9247 | 3266 | t_queryring->set_capacity(ringsize); |
f26bf547 | 3267 | t_servfailqueryring = std::unique_ptr<boost::circular_buffer<pair<DNSName, uint16_t> > >(new boost::circular_buffer<pair<DNSName, uint16_t> >()); |
3ddb9247 | 3268 | t_servfailqueryring->set_capacity(ringsize); |
92011b8f | 3269 | } |
3ddb9247 | 3270 | |
f26bf547 | 3271 | MT=std::unique_ptr<MTasker<PacketID,string> >(new MTasker<PacketID,string>(::arg().asNum("stack-size"))); |
3ddb9247 | 3272 | |
bb4bdbaf BH |
3273 | PacketID pident; |
3274 | ||
3275 | t_fdm=getMultiplexer(); | |
f3d1d67b | 3276 | if(!t_id) { |
d07bf7ff | 3277 | if(::arg().mustDo("webserver")) { |
30a1aa92 | 3278 | L<<Logger::Warning << "Enabling web server" << endl; |
8989097d | 3279 | try { |
1ce57618 | 3280 | new RecursorWebServer(t_fdm); |
8989097d CH |
3281 | } |
3282 | catch(PDNSException &e) { | |
3283 | L<<Logger::Error<<"Exception: "<<e.reason<<endl; | |
3284 | exit(99); | |
3285 | } | |
f3d1d67b | 3286 | } |
83252304 | 3287 | L<<Logger::Error<<"Enabled '"<< t_fdm->getName() << "' multiplexer"<<endl; |
f3d1d67b | 3288 | } |
83252304 | 3289 | |
49a699c4 | 3290 | t_fdm->addReadFD(g_pipes[t_id].readToThread, handlePipeRequest); |
83252304 | 3291 | |
810ff705 | 3292 | if(g_useOneSocketPerThread) { |
2573d4a6 RG |
3293 | for(deferredAdd_t::const_iterator i = deferredAdds[t_id].cbegin(); i != deferredAdds[t_id].cend(); ++i) { |
3294 | t_fdm->addReadFD(i->first, i->second); | |
810ff705 RG |
3295 | } |
3296 | } | |
3297 | else { | |
3298 | if(!g_weDistributeQueries || !t_id) { // if we distribute queries, only t_id = 0 listens | |
0670917b | 3299 | for(deferredAdd_t::const_iterator i = deferredAdds[0].cbegin(); i != deferredAdds[0].cend(); ++i) { |
810ff705 RG |
3300 | t_fdm->addReadFD(i->first, i->second); |
3301 | } | |
3302 | } | |
3303 | } | |
3ddb9247 | 3304 | |
b0b37121 | 3305 | registerAllStats(); |
674cf0f6 | 3306 | if(!t_id) { |
674cf0f6 BH |
3307 | t_fdm->addReadFD(s_rcc.d_fd, handleRCC); // control channel |
3308 | } | |
1bc3c142 | 3309 | |
f7c1d4e3 | 3310 | unsigned int maxTcpClients=::arg().asNum("max-tcp-clients"); |
3ddb9247 | 3311 | |
f7c1d4e3 | 3312 | bool listenOnTCP(true); |
49a699c4 | 3313 | |
2c78bd57 | 3314 | time_t last_carbon=0; |
3315 | time_t carbonInterval=::arg().asNum("carbon-interval"); | |
ac0995bb | 3316 | counter.store(0); // used to periodically execute certain tasks |
f7c1d4e3 | 3317 | for(;;) { |
ac0e821b | 3318 | while(MT->schedule(&g_now)); // MTasker letting the mthreads do their thing |
3ddb9247 | 3319 | |
3427fa8a BH |
3320 | if(!(counter%500)) { |
3321 | MT->makeThread(houseKeeping, 0); | |
f7c1d4e3 BH |
3322 | } |
3323 | ||
d2392145 | 3324 | if(!(counter%55)) { |
d8f6d49f | 3325 | typedef vector<pair<int, FDMultiplexer::funcparam_t> > expired_t; |
bb4bdbaf | 3326 | expired_t expired=t_fdm->getTimeouts(g_now); |
3ddb9247 | 3327 | |
f7c1d4e3 | 3328 | for(expired_t::iterator i=expired.begin() ; i != expired.end(); ++i) { |
cd989c87 | 3329 | shared_ptr<TCPConnection> conn=any_cast<shared_ptr<TCPConnection> >(i->second); |
4957a608 | 3330 | if(g_logCommonErrors) |
5cc8371b | 3331 | L<<Logger::Warning<<"Timeout from remote TCP client "<< conn->d_remote.toStringWithPort() <<endl; |
4957a608 | 3332 | t_fdm->removeReadFD(i->first); |
f7c1d4e3 BH |
3333 | } |
3334 | } | |
3ddb9247 | 3335 | |
f7c1d4e3 BH |
3336 | counter++; |
3337 | ||
3427fa8a | 3338 | if(!t_id && statsWanted) { |
f7c1d4e3 BH |
3339 | doStats(); |
3340 | } | |
3341 | ||
3342 | Utility::gettimeofday(&g_now, 0); | |
2c78bd57 | 3343 | |
3344 | if(!t_id && (g_now.tv_sec - last_carbon >= carbonInterval)) { | |
3345 | MT->makeThread(doCarbonDump, 0); | |
3346 | last_carbon = g_now.tv_sec; | |
3347 | } | |
3348 | ||
bb4bdbaf | 3349 | t_fdm->run(&g_now); |
3ea54bf0 | 3350 | // 'run' updates g_now for us |
f7c1d4e3 | 3351 | |
b8ef5c5c | 3352 | if(!g_weDistributeQueries || !t_id) { // if pdns distributes queries, only tid 0 should do this |
5c889cf5 | 3353 | if(listenOnTCP) { |
3354 | if(TCPConnection::getCurrentConnections() > maxTcpClients) { // shutdown, too many connections | |
3355 | for(tcpListenSockets_t::iterator i=g_tcpListenSockets.begin(); i != g_tcpListenSockets.end(); ++i) | |
3356 | t_fdm->removeReadFD(*i); | |
3357 | listenOnTCP=false; | |
3358 | } | |
f7c1d4e3 | 3359 | } |
5c889cf5 | 3360 | else { |
3361 | if(TCPConnection::getCurrentConnections() <= maxTcpClients) { // reenable | |
3362 | for(tcpListenSockets_t::iterator i=g_tcpListenSockets.begin(); i != g_tcpListenSockets.end(); ++i) | |
3363 | t_fdm->addReadFD(*i, handleNewTCPQuestion); | |
3364 | listenOnTCP=true; | |
3365 | } | |
f7c1d4e3 BH |
3366 | } |
3367 | } | |
3368 | } | |
3369 | } | |
3f81d239 | 3370 | catch(PDNSException &ae) { |
bb4bdbaf BH |
3371 | L<<Logger::Error<<"Exception: "<<ae.reason<<endl; |
3372 | return 0; | |
3373 | } | |
3374 | catch(std::exception &e) { | |
3375 | L<<Logger::Error<<"STL Exception: "<<e.what()<<endl; | |
3376 | return 0; | |
3377 | } | |
3378 | catch(...) { | |
3379 | L<<Logger::Error<<"any other exception in main: "<<endl; | |
3380 | return 0; | |
3381 | } | |
3382 | ||
51e2144e | 3383 | |
3ddb9247 | 3384 | int main(int argc, char **argv) |
288f4aa9 | 3385 | { |
dbd23fc2 BH |
3386 | g_argc = argc; |
3387 | g_argv = argv; | |
5e3de507 | 3388 | g_stats.startupTime=time(0); |
3e135495 | 3389 | versionSetProduct(ProductRecursor); |
8a63d3ce | 3390 | reportBasicTypes(); |
0007c2e5 | 3391 | reportOtherTypes(); |
ea634573 | 3392 | |
22030c37 | 3393 | int ret = EXIT_SUCCESS; |
caa6eefa | 3394 | |
288f4aa9 | 3395 | try { |
f888311c | 3396 | ::arg().set("stack-size","stack size per mthread")="200000"; |
2e3d8a19 | 3397 | ::arg().set("soa-minimum-ttl","Don't change")="0"; |
2e3d8a19 | 3398 | ::arg().set("no-shuffle","Don't change")="off"; |
2e3d8a19 | 3399 | ::arg().set("local-port","port to listen on")="53"; |
32252594 | 3400 | ::arg().set("local-address","IP addresses to listen on, separated by spaces or commas. Also accepts ports.")="127.0.0.1"; |
fec7dd5a | 3401 | ::arg().setSwitch("non-local-bind", "Enable binding to non-local addresses by using FREEBIND / BINDANY socket options")="no"; |
77499b05 | 3402 | ::arg().set("trace","if we should output heaps of logging. set to 'fail' to only log failing domains")="off"; |
a6415142 | 3403 | ::arg().set("dnssec", "DNSSEC mode: off/process-no-validate (default)/process/log-fail/validate")="process-no-validate"; |
c87e1876 | 3404 | ::arg().set("dnssec-log-bogus", "Log DNSSEC bogus validations")="no"; |
d3f809bf | 3405 | ::arg().set("daemon","Operate as a daemon")="no"; |
191f2e47 | 3406 | ::arg().setSwitch("write-pid","Write a PID file")="yes"; |
9afa8662 | 3407 | ::arg().set("loglevel","Amount of logging. Higher is more. Do not set below 3")="6"; |
b6cfa948 | 3408 | ::arg().set("disable-syslog","Disable logging to syslog, useful when running inside a supervisor that logs stdout")="no"; |
b18fa400 | 3409 | ::arg().set("log-timestamp","Print timestamps in log lines, useful to disable when running with a tool that timestamps stdout already")="yes"; |
22e0810c | 3410 | ::arg().set("log-common-errors","If we should log rather common errors")="no"; |
2e3d8a19 BH |
3411 | ::arg().set("chroot","switch to chroot jail")=""; |
3412 | ::arg().set("setgid","If set, change group id to this gid for more security")=""; | |
3413 | ::arg().set("setuid","If set, change user id to this uid for more security")=""; | |
c83ee49d | 3414 | ::arg().set("network-timeout", "Wait this number of milliseconds for network i/o")="1500"; |
bb4bdbaf | 3415 | ::arg().set("threads", "Launch this number of threads")="2"; |
adabfcb9 | 3416 | ::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 | 3417 | ::arg().set("config-name","Name of this virtual configuration - will rename the binary image")=""; |
d07bf7ff | 3418 | ::arg().set("api-config-dir", "Directory where REST API stores config and zones") = ""; |
479e0976 CH |
3419 | ::arg().set("api-key", "Static pre-shared authentication key for access to the REST API") = ""; |
3420 | ::arg().set("api-logfile", "Location of the server logfile (used by the REST API)") = "/var/log/pdns.log"; | |
3421 | ::arg().set("api-readonly", "Disallow data modification through the REST API when set") = "no"; | |
3422 | ::arg().setSwitch("webserver", "Start a webserver (for REST API)") = "no"; | |
d07bf7ff PL |
3423 | ::arg().set("webserver-address", "IP Address of webserver to listen on") = "127.0.0.1"; |
3424 | ::arg().set("webserver-port", "Port of webserver to listen on") = "8082"; | |
3425 | ::arg().set("webserver-password", "Password required for accessing the webserver") = ""; | |
be3e1477 | 3426 | ::arg().set("webserver-allow-from","Webserver access is only allowed from these subnets")="127.0.0.1,::1"; |
cc08b5a9 | 3427 | ::arg().set("carbon-ourname", "If set, overrides our reported hostname for carbon stats")=""; |
e12f8407 | 3428 | ::arg().set("carbon-server", "If set, send metrics in carbon (graphite) format to this server IP address")=""; |
2c78bd57 | 3429 | ::arg().set("carbon-interval", "Number of seconds between carbon (graphite) updates")="30"; |
0ec489bf | 3430 | ::arg().set("statistics-interval", "Number of seconds between printing of recursor statistics, 0 to disable")="1800"; |
c038218b | 3431 | ::arg().set("quiet","Suppress logging of questions and answers")=""; |
f27e6356 | 3432 | ::arg().set("logging-facility","Facility to log messages as. 0 corresponds to local0")=""; |
2e3d8a19 | 3433 | ::arg().set("config-dir","Location of configuration directory (recursor.conf)")=SYSCONFDIR; |
fdbf35ac BH |
3434 | ::arg().set("socket-owner","Owner of socket")=""; |
3435 | ::arg().set("socket-group","Group of socket")=""; | |
3436 | ::arg().set("socket-mode", "Permissions for socket")=""; | |
3ddb9247 | 3437 | |
f0f3f0b0 | 3438 | ::arg().set("socket-dir",string("Where the controlsocket will live, ")+LOCALSTATEDIR+" when unset and not chrooted" )=""; |
2e3d8a19 BH |
3439 | ::arg().set("delegation-only","Which domains we only accept delegations from")=""; |
3440 | ::arg().set("query-local-address","Source IP address for sending queries")="0.0.0.0"; | |
d4fb76e9 | 3441 | ::arg().set("query-local-address6","Source IPv6 address for sending queries. IF UNSET, IPv6 WILL NOT BE USED FOR OUTGOING QUERIES")=""; |
2e3d8a19 | 3442 | ::arg().set("client-tcp-timeout","Timeout in seconds when talking to TCP clients")="2"; |
85c32340 | 3443 | ::arg().set("max-mthreads", "Maximum number of simultaneous Mtasker threads")="2048"; |
2e3d8a19 | 3444 | ::arg().set("max-tcp-clients","Maximum number of simultaneous TCP clients")="128"; |
324dc148 | 3445 | ::arg().set("server-down-max-fails","Maximum number of consecutive timeouts (and unreachables) to mark a server as down ( 0 => disabled )")="64"; |
979edd70 | 3446 | ::arg().set("server-down-throttle-time","Number of seconds to throttle all queries to a server after being marked as down")="60"; |
2e3d8a19 | 3447 | ::arg().set("hint-file", "If set, load root hints from this file")=""; |
b45eb27c | 3448 | ::arg().set("max-cache-entries", "If set, maximum number of entries in the main cache")="1000000"; |
a9af3782 | 3449 | ::arg().set("max-negative-ttl", "maximum number of seconds to keep a negative cached entry in memory")="3600"; |
c3e753c7 | 3450 | ::arg().set("max-cache-ttl", "maximum number of seconds to keep a cached entry in memory")="86400"; |
1051f8a9 | 3451 | ::arg().set("packetcache-ttl", "maximum number of seconds to keep a cached entry in packetcache")="3600"; |
927c12b0 | 3452 | ::arg().set("max-packetcache-entries", "maximum number of entries to keep in the packetcache")="500000"; |
1051f8a9 | 3453 | ::arg().set("packetcache-servfail-ttl", "maximum number of seconds to keep a cached servfail entry in packetcache")="60"; |
54c4c0d8 | 3454 | ::arg().set("server-id", "Returned when queried for 'id.server' TXT or NSID, defaults to hostname")=""; |
92011b8f | 3455 | ::arg().set("stats-ringbuffer-entries", "maximum number of packets to store statistics for")="10000"; |
ba1a571d | 3456 | ::arg().set("version-string", "string reported on version.pdns or version.bind")=fullVersionString(); |
49a699c4 | 3457 | ::arg().set("allow-from", "If set, only allow these comma separated netmasks to recurse")=LOCAL_NETS; |
2c95fc65 | 3458 | ::arg().set("allow-from-file", "If set, load allowed netmasks from this file")=""; |
51e2144e | 3459 | ::arg().set("entropy-source", "If set, read entropy from this file")="/dev/urandom"; |
3ddb9247 | 3460 | ::arg().set("dont-query", "If set, do not query these netmasks for DNS data")=DONT_QUERY; |
4e120339 | 3461 | ::arg().set("max-tcp-per-client", "If set, maximum number of TCP sessions per client (IP address)")="0"; |
fde296a3 | 3462 | ::arg().set("max-tcp-queries-per-connection", "If set, maximum number of TCP queries in a TCP connection")="0"; |
0d5f0a9f | 3463 | ::arg().set("spoof-nearmiss-max", "If non-zero, assume spoofing after this many near misses")="20"; |
4ef015cd | 3464 | ::arg().set("single-socket", "If set, only use a single socket for outgoing queries")="off"; |
5605c067 | 3465 | ::arg().set("auth-zones", "Zones for which we have authoritative data, comma separated domain=file pairs ")=""; |
3e61e7f7 | 3466 | ::arg().set("lua-config-file", "More powerful configuration options")=""; |
644dd1da | 3467 | |
5605c067 | 3468 | ::arg().set("forward-zones", "Zones for which we forward queries, comma separated domain=ip pairs")=""; |
927c12b0 BH |
3469 | ::arg().set("forward-zones-recurse", "Zones for which we forward queries with recursion bit, comma separated domain=ip pairs")=""; |
3470 | ::arg().set("forward-zones-file", "File with (+)domain=ip pairs for forwarding")=""; | |
5605c067 | 3471 | ::arg().set("export-etc-hosts", "If we should serve up contents from /etc/hosts")="off"; |
ac0b4eb3 | 3472 | ::arg().set("export-etc-hosts-search-suffix", "Also serve up the contents of /etc/hosts with this suffix")=""; |
3ea54bf0 | 3473 | ::arg().set("etc-hosts-file", "Path to 'hosts' file")="/etc/hosts"; |
e498dac1 | 3474 | ::arg().set("serve-rfc1918", "If we should be authoritative for RFC 1918 private IP space")="yes"; |
4485aa35 | 3475 | ::arg().set("lua-dns-script", "Filename containing an optional 'lua' script that will be used to modify dns answers")=""; |
08f3f638 | 3476 | ::arg().set("latency-statistic-size","Number of latency values to calculate the qa-latency average")="10000"; |
3ddb9247 | 3477 | ::arg().setSwitch( "disable-packetcache", "Disable packetcache" )= "no"; |
35695d18 | 3478 | ::arg().set("ecs-ipv4-bits", "Number of bits of IPv4 address to pass for EDNS Client Subnet")="24"; |
3479 | ::arg().set("ecs-ipv6-bits", "Number of bits of IPv6 address to pass for EDNS Client Subnet")="56"; | |
3f975863 | 3480 | ::arg().set("edns-subnet-whitelist", "List of netmasks and domains that we should enable EDNS subnet for")=""; |
2fe3354d | 3481 | ::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 | 3482 | ::arg().set("ecs-scope-zero-address", "Address to send to whitelisted authoritative servers for incoming queries with ECS prefix-length source of 0")=""; |
a16c4536 | 3483 | ::arg().setSwitch( "use-incoming-edns-subnet", "Pass along received EDNS Client Subnet information")="no"; |
e498dac1 | 3484 | ::arg().setSwitch( "pdns-distributes-queries", "If PowerDNS itself should distribute queries over threads")="yes"; |
4ca2d205 | 3485 | ::arg().setSwitch( "root-nx-trust", "If set, believe that an NXDOMAIN from the root means the TLD does not exist")="yes"; |
e661a20b | 3486 | ::arg().setSwitch( "any-to-tcp","Answer ANY queries with tc=1, shunting to TCP" )="no"; |
b3adda56 | 3487 | ::arg().setSwitch( "lowercase-outgoing","Force outgoing questions to lowercase")="no"; |
00b8cadc | 3488 | ::arg().setSwitch("gettag-needs-edns-options", "If EDNS Options should be extracted before calling the gettag() hook")="no"; |
a09a8ce0 | 3489 | ::arg().set("udp-truncation-threshold", "Maximum UDP response size before we truncate")="1680"; |
b33c2462 | 3490 | ::arg().set("edns-outgoing-bufsize", "Outgoing EDNS buffer size")="1680"; |
aadceba8 | 3491 | ::arg().set("minimum-ttl-override", "Set under adverse conditions, a minimum TTL")="0"; |
173d790e | 3492 | ::arg().set("max-qperq", "Maximum outgoing queries per query")="50"; |
c5950146 | 3493 | ::arg().set("max-total-msec", "Maximum total wall-clock time per query in milliseconds, 0 for unlimited")="7000"; |
7c3398aa | 3494 | ::arg().set("max-recursion-depth", "Maximum number of internal recursion calls per query, 0 for unlimited")="40"; |
a09a8ce0 | 3495 | |
68e6df3c | 3496 | ::arg().set("include-dir","Include *.conf files from this directory")=""; |
d67620e4 | 3497 | ::arg().set("security-poll-suffix","Domain name from which to query security update notifications")="secpoll.powerdns.com."; |
2332f42d | 3498 | |
3499 | ::arg().setSwitch("reuseport","Enable SO_REUSEPORT allowing multiple recursors processes to listen to 1 address")="no"; | |
2e3d8a19 | 3500 | |
d705aad9 | 3501 | ::arg().setSwitch("snmp-agent", "If set, register as an SNMP agent")="no"; |
396f126e | 3502 | ::arg().set("snmp-master-socket", "If set and snmp-agent is set, the socket to use to register to the SNMP master")=""; |
d705aad9 | 3503 | |
0735b17e | 3504 | ::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 | 3505 | ::arg().set("nsec3-max-iterations", "Maximum number of iterations allowed for an NSEC3 record")="2500"; |
0735b17e | 3506 | |
8fd25133 RG |
3507 | ::arg().set("cpu-map", "Thread to CPU mapping, space separated thread-id=cpu1,cpu2..cpuN pairs")=""; |
3508 | ||
98d36505 RG |
3509 | ::arg().setSwitch("log-rpz-changes", "Log additions and removals to RPZ zones at Info level")="no"; |
3510 | ||
5cc8371b | 3511 | ::arg().set("xpf-allow-from","XPF information is only processed from these subnets")=""; |
59cb4a79 | 3512 | ::arg().set("xpf-rr-code","XPF option code to use")="0"; |
5cc8371b | 3513 | |
2e3d8a19 | 3514 | ::arg().setCmd("help","Provide a helpful message"); |
ba1a571d | 3515 | ::arg().setCmd("version","Print version string"); |
d5141417 | 3516 | ::arg().setCmd("config","Output blank configuration"); |
f27e6356 | 3517 | L.toConsole(Logger::Info); |
2e3d8a19 | 3518 | ::arg().laxParse(argc,argv); // do a lax parse |
c75a6a9e | 3519 | |
2d733c0f CH |
3520 | string configname=::arg()["config-dir"]+"/recursor.conf"; |
3521 | if(::arg()["config-name"]!="") { | |
3522 | configname=::arg()["config-dir"]+"/recursor-"+::arg()["config-name"]+".conf"; | |
5124de27 | 3523 | s_programname+="-"+::arg()["config-name"]; |
2d733c0f CH |
3524 | } |
3525 | cleanSlashes(configname); | |
5124de27 | 3526 | |
5cc1ea1d CH |
3527 | if(!::arg().getCommands().empty()) { |
3528 | cerr<<"Fatal: non-option on the command line, perhaps a '--setting=123' statement missed the '='?"<<endl; | |
3529 | exit(99); | |
3530 | } | |
3531 | ||
577cf284 BH |
3532 | if(::arg().mustDo("config")) { |
3533 | cout<<::arg().configstring()<<endl; | |
3534 | exit(0); | |
3535 | } | |
3536 | ||
3ddb9247 | 3537 | if(!::arg().file(configname.c_str())) |
c75a6a9e BH |
3538 | L<<Logger::Warning<<"Unable to parse configuration file '"<<configname<<"'"<<endl; |
3539 | ||
2e3d8a19 | 3540 | ::arg().parse(argc,argv); |
c836dc19 | 3541 | |
f0f3f0b0 PL |
3542 | if( !::arg()["chroot"].empty() && !::arg()["api-config-dir"].empty() && !::arg().mustDo("api-readonly") ) { |
3543 | L<<Logger::Error<<"Using chroot and a writable API is not possible"<<endl; | |
3544 | exit(EXIT_FAILURE); | |
3545 | } | |
3546 | ||
3547 | if (::arg()["socket-dir"].empty()) { | |
3548 | if (::arg()["chroot"].empty()) | |
3549 | ::arg().set("socket-dir") = LOCALSTATEDIR; | |
3550 | else | |
3551 | ::arg().set("socket-dir") = "/"; | |
3552 | } | |
3553 | ||
2e3d8a19 | 3554 | ::arg().set("delegation-only")=toLower(::arg()["delegation-only"]); |
562588a3 | 3555 | |
61d74169 | 3556 | if(::arg().asNum("threads")==1) |
3557 | ::arg().set("pdns-distributes-queries")="no"; | |
3558 | ||
2e3d8a19 | 3559 | if(::arg().mustDo("help")) { |
ff5ba4f9 WA |
3560 | cout<<"syntax:"<<endl<<endl; |
3561 | cout<<::arg().helpstring(::arg()["help"])<<endl; | |
3562 | exit(0); | |
b636533b | 3563 | } |
5e3de507 | 3564 | if(::arg().mustDo("version")) { |
ba1a571d | 3565 | showProductVersion(); |
3613a51c | 3566 | showBuildConfiguration(); |
67076869 | 3567 | exit(0); |
5e3de507 | 3568 | } |
b636533b | 3569 | |
34162f8f | 3570 | Logger::Urgency logUrgency = (Logger::Urgency)::arg().asNum("loglevel"); |
f48d7b65 | 3571 | |
34162f8f CH |
3572 | if (logUrgency < Logger::Error) |
3573 | logUrgency = Logger::Error; | |
f48d7b65 | 3574 | if(!g_quiet && logUrgency < Logger::Info) { // Logger::Info=6, Logger::Debug=7 |
3575 | logUrgency = Logger::Info; // if you do --quiet=no, you need Info to also see the query log | |
3576 | } | |
34162f8f CH |
3577 | L.setLoglevel(logUrgency); |
3578 | L.toConsole(logUrgency); | |
3579 | ||
f7c1d4e3 | 3580 | serviceMain(argc, argv); |
288f4aa9 | 3581 | } |
3f81d239 | 3582 | catch(PDNSException &ae) { |
c836dc19 | 3583 | L<<Logger::Error<<"Exception: "<<ae.reason<<endl; |
22030c37 | 3584 | ret=EXIT_FAILURE; |
288f4aa9 | 3585 | } |
fdbf35ac | 3586 | catch(std::exception &e) { |
c836dc19 | 3587 | L<<Logger::Error<<"STL Exception: "<<e.what()<<endl; |
22030c37 | 3588 | ret=EXIT_FAILURE; |
288f4aa9 BH |
3589 | } |
3590 | catch(...) { | |
c836dc19 | 3591 | L<<Logger::Error<<"any other exception in main: "<<endl; |
22030c37 | 3592 | ret=EXIT_FAILURE; |
288f4aa9 | 3593 | } |
3ddb9247 | 3594 | |
22030c37 | 3595 | return ret; |
288f4aa9 | 3596 | } |