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288f4aa9 BH |
1 | /* |
2 | PowerDNS Versatile Database Driven Nameserver | |
4e9a20e6 | 3 | Copyright (C) 2003 - 2014 PowerDNS.COM BV |
288f4aa9 BH |
4 | |
5 | This program is free software; you can redistribute it and/or modify | |
f28307ad BH |
6 | it under the terms of the GNU General Public License version 2 |
7 | as published by the Free Software Foundation | |
288f4aa9 | 8 | |
f782fe38 MH |
9 | Additionally, the license of this program contains a special |
10 | exception which allows to distribute the program in binary form when | |
11 | it is linked against OpenSSL. | |
12 | ||
288f4aa9 BH |
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 | |
06bd9ccf | 20 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
288f4aa9 | 21 | */ |
caa6eefa | 22 | |
76473b92 KM |
23 | #include <netdb.h> |
24 | #include <sys/stat.h> | |
25 | #include <unistd.h> | |
5a38281c | 26 | #include <boost/foreach.hpp> |
2470b36e | 27 | #include "ws-recursor.hh" |
49a699c4 | 28 | #include <pthread.h> |
3ea54bf0 | 29 | #include "recpacketcache.hh" |
caa6eefa | 30 | #include "utility.hh" |
51e2144e | 31 | #include "dns_random.hh" |
288f4aa9 BH |
32 | #include <iostream> |
33 | #include <errno.h> | |
81859ba5 | 34 | #include <boost/static_assert.hpp> |
288f4aa9 BH |
35 | #include <map> |
36 | #include <set> | |
97bb160b | 37 | #include "recursor_cache.hh" |
38c9ceaa | 38 | #include "cachecleaner.hh" |
288f4aa9 | 39 | #include <stdio.h> |
c75a6a9e | 40 | #include <signal.h> |
288f4aa9 | 41 | #include <stdlib.h> |
bb4bdbaf | 42 | #include "misc.hh" |
288f4aa9 BH |
43 | #include "mtasker.hh" |
44 | #include <utility> | |
288f4aa9 BH |
45 | #include "arguments.hh" |
46 | #include "syncres.hh" | |
88def049 BH |
47 | #include <fcntl.h> |
48 | #include <fstream> | |
5c633640 BH |
49 | #include "sstuff.hh" |
50 | #include <boost/tuple/tuple.hpp> | |
51 | #include <boost/tuple/tuple_comparison.hpp> | |
72df400f | 52 | #include <boost/shared_array.hpp> |
ea634573 | 53 | #include <boost/lexical_cast.hpp> |
7f1fa77d | 54 | #include <boost/function.hpp> |
5605c067 | 55 | #include <boost/algorithm/string.hpp> |
40a3dd64 | 56 | #include <netinet/tcp.h> |
ea634573 BH |
57 | #include "dnsparser.hh" |
58 | #include "dnswriter.hh" | |
59 | #include "dnsrecords.hh" | |
f814d7c8 | 60 | #include "zoneparser-tng.hh" |
1d5b3ce6 | 61 | #include "rec_channel.hh" |
aaacf7f2 | 62 | #include "logger.hh" |
c8ddb7c2 | 63 | #include "iputils.hh" |
09e6702a | 64 | #include "mplexer.hh" |
c038218b | 65 | #include "config.h" |
5704e107 | 66 | #include "lua-recursor.hh" |
ba1a571d | 67 | #include "version.hh" |
79332bff | 68 | #include "responsestats.hh" |
d67620e4 | 69 | #include "secpoll-recursor.hh" |
a2bfc3ff BH |
70 | #ifndef RECURSOR |
71 | #include "statbag.hh" | |
72 | StatBag S; | |
73 | #endif | |
74 | ||
bb4bdbaf | 75 | __thread FDMultiplexer* t_fdm; |
674cf0f6 | 76 | __thread unsigned int t_id; |
09e6702a | 77 | unsigned int g_maxTCPPerClient; |
5b0ddd18 | 78 | unsigned int g_networkTimeoutMsec; |
08f3f638 | 79 | uint64_t g_latencyStatSize; |
09e6702a | 80 | bool g_logCommonErrors; |
e661a20b | 81 | bool g_anyToTcp; |
a09a8ce0 | 82 | uint16_t g_udpTruncationThreshold; |
5704e107 | 83 | __thread shared_ptr<RecursorLua>* t_pdl; |
60c8afa8 | 84 | |
85 | __thread addrringbuf_t* t_remotes, *t_servfailremotes, *t_largeanswerremotes; | |
86 | ||
92011b8f | 87 | __thread boost::circular_buffer<pair<std::string, uint16_t> >* t_queryring, *t_servfailqueryring; |
77499b05 | 88 | __thread shared_ptr<Regex>* t_traceRegex; |
674cf0f6 | 89 | |
d7dae798 BH |
90 | RecursorControlChannel s_rcc; // only active in thread 0 |
91 | ||
92 | // for communicating with our threads | |
49a699c4 BH |
93 | struct ThreadPipeSet |
94 | { | |
95 | int writeToThread; | |
96 | int readToThread; | |
97 | int writeFromThread; | |
98 | int readFromThread; | |
99 | }; | |
3ea54bf0 | 100 | |
d7dae798 | 101 | vector<ThreadPipeSet> g_pipes; // effectively readonly after startup |
5c633640 | 102 | |
d7dae798 | 103 | SyncRes::domainmap_t* g_initialDomainMap; // new threads needs this to be setup |
49a699c4 BH |
104 | |
105 | #include "namespaces.hh" | |
3ea54bf0 | 106 | |
49a699c4 | 107 | __thread MemRecursorCache* t_RC; |
16beeaa4 | 108 | __thread RecursorPacketCache* t_packetCache; |
1d5b3ce6 BH |
109 | RecursorStats g_stats; |
110 | bool g_quiet; | |
49a699c4 | 111 | |
1bc3c142 BH |
112 | bool g_weDistributeQueries; // if true, only 1 thread listens on the incoming query sockets |
113 | ||
41942bb3 | 114 | __thread NetmaskGroup* t_allowFrom; |
49a699c4 BH |
115 | static NetmaskGroup* g_initialAllowFrom; // new thread needs to be setup with this |
116 | ||
eb5bae86 | 117 | NetmaskGroup* g_dontQuery; |
2d733c0f | 118 | string s_programname="pdns_recursor"; |
49a699c4 | 119 | |
40a3dd64 BH |
120 | typedef vector<int> tcpListenSockets_t; |
121 | tcpListenSockets_t g_tcpListenSockets; // shared across threads, but this is fine, never written to from a thread. All threads listen on all sockets | |
3159c9ef | 122 | int g_tcpTimeout; |
85c32340 | 123 | unsigned int g_maxMThreads; |
d7dae798 | 124 | struct timeval g_now; // timestamp, updated (too) frequently |
84433b79 | 125 | typedef map<int, ComboAddress> listenSocketsAddresses_t; // is shared across all threads right now |
126 | listenSocketsAddresses_t g_listenSocketsAddresses; // is shared across all threads right now | |
18af64a8 | 127 | |
d7dae798 BH |
128 | __thread MT_t* MT; // the big MTasker |
129 | ||
c3828c03 BH |
130 | unsigned int g_numThreads; |
131 | ||
12cd44ee | 132 | #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" |
133 | // Bad Nets taken from both: | |
134 | // http://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml | |
135 | // and | |
136 | // http://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml | |
137 | // where such a network may not be considered a valid destination | |
138 | #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" | |
139 | #define DONT_QUERY LOCAL_NETS ", " BAD_NETS | |
49a699c4 | 140 | |
d7dae798 | 141 | //! used to send information to a newborn mthread |
ea634573 | 142 | struct DNSComboWriter { |
3ea54bf0 | 143 | DNSComboWriter(const char* data, uint16_t len, const struct timeval& now) : d_mdp(data, len), d_now(now), |
232f0877 | 144 | d_tcp(false), d_socket(-1) |
ea634573 BH |
145 | {} |
146 | MOADNSParser d_mdp; | |
00c9b8c1 | 147 | void setRemote(const ComboAddress* sa) |
ea634573 | 148 | { |
37d3f960 | 149 | d_remote=*sa; |
ea634573 BH |
150 | } |
151 | ||
b71b60ee | 152 | void setLocal(const ComboAddress& sa) |
153 | { | |
154 | d_local=sa; | |
155 | } | |
156 | ||
157 | ||
ea634573 BH |
158 | void setSocket(int sock) |
159 | { | |
160 | d_socket=sock; | |
161 | } | |
a1754c6a BH |
162 | |
163 | string getRemote() const | |
164 | { | |
37d3f960 | 165 | return d_remote.toString(); |
a1754c6a BH |
166 | } |
167 | ||
c9e9e5e0 | 168 | struct timeval d_now; |
b71b60ee | 169 | ComboAddress d_remote, d_local; |
ea634573 BH |
170 | bool d_tcp; |
171 | int d_socket; | |
cd989c87 | 172 | shared_ptr<TCPConnection> d_tcpConnection; |
ea634573 BH |
173 | }; |
174 | ||
175 | ||
288f4aa9 BH |
176 | ArgvMap &arg() |
177 | { | |
178 | static ArgvMap theArg; | |
179 | return theArg; | |
180 | } | |
4ef015cd | 181 | |
09e6702a | 182 | |
d8f6d49f | 183 | void handleTCPClientWritable(int fd, FDMultiplexer::funcparam_t& var); |
09e6702a | 184 | |
50c81227 | 185 | // -1 is error, 0 is timeout, 1 is success |
5c633640 BH |
186 | int asendtcp(const string& data, Socket* sock) |
187 | { | |
188 | PacketID pident; | |
189 | pident.sock=sock; | |
190 | pident.outMSG=data; | |
23db0a09 | 191 | |
bb4bdbaf | 192 | t_fdm->addWriteFD(sock->getHandle(), handleTCPClientWritable, pident); |
50c81227 | 193 | string packet; |
5c633640 | 194 | |
5b0ddd18 | 195 | int ret=MT->waitEvent(pident, &packet, g_networkTimeoutMsec); |
23db0a09 | 196 | |
9170fbaf | 197 | if(!ret || ret==-1) { // timeout |
bb4bdbaf | 198 | t_fdm->removeWriteFD(sock->getHandle()); |
5c633640 | 199 | } |
50c81227 BH |
200 | else if(packet.size() !=data.size()) { // main loop tells us what it sent out, or empty in case of an error |
201 | return -1; | |
202 | } | |
9170fbaf | 203 | return ret; |
5c633640 BH |
204 | } |
205 | ||
d8f6d49f | 206 | void handleTCPClientReadable(int fd, FDMultiplexer::funcparam_t& var); |
09e6702a | 207 | |
9170fbaf | 208 | // -1 is error, 0 is timeout, 1 is success |
825fa717 | 209 | int arecvtcp(string& data, int len, Socket* sock, bool incompleteOkay) |
288f4aa9 | 210 | { |
50c81227 | 211 | data.clear(); |
5c633640 BH |
212 | PacketID pident; |
213 | pident.sock=sock; | |
214 | pident.inNeeded=len; | |
825fa717 | 215 | pident.inIncompleteOkay=incompleteOkay; |
bb4bdbaf | 216 | t_fdm->addReadFD(sock->getHandle(), handleTCPClientReadable, pident); |
5c633640 | 217 | |
bb4bdbaf | 218 | int ret=MT->waitEvent(pident,&data, g_networkTimeoutMsec); |
9170fbaf | 219 | if(!ret || ret==-1) { // timeout |
bb4bdbaf | 220 | t_fdm->removeReadFD(sock->getHandle()); |
288f4aa9 | 221 | } |
50c81227 BH |
222 | else if(data.empty()) {// error, EOF or other |
223 | return -1; | |
224 | } | |
225 | ||
9170fbaf | 226 | return ret; |
288f4aa9 BH |
227 | } |
228 | ||
5a38281c | 229 | vector<ComboAddress> g_localQueryAddresses4, g_localQueryAddresses6; |
046c5a5d | 230 | const ComboAddress g_local4("0.0.0.0"), g_local6("::"); |
1652a63e | 231 | |
d7dae798 | 232 | //! pick a random query local address |
1652a63e | 233 | ComboAddress getQueryLocalAddress(int family, uint16_t port) |
5a38281c | 234 | { |
1652a63e | 235 | ComboAddress ret; |
5a38281c | 236 | if(family==AF_INET) { |
1652a63e BH |
237 | if(g_localQueryAddresses4.empty()) |
238 | ret = g_local4; | |
239 | else | |
240 | ret = g_localQueryAddresses4[dns_random(g_localQueryAddresses4.size())]; | |
241 | ret.sin4.sin_port = htons(port); | |
5a38281c BH |
242 | } |
243 | else { | |
244 | if(g_localQueryAddresses6.empty()) | |
1652a63e BH |
245 | ret = g_local6; |
246 | else | |
247 | ret = g_localQueryAddresses6[dns_random(g_localQueryAddresses6.size())]; | |
248 | ||
249 | ret.sin6.sin6_port = htons(port); | |
5a38281c | 250 | } |
1652a63e | 251 | return ret; |
5a38281c | 252 | } |
4ef015cd | 253 | |
d8f6d49f | 254 | void handleUDPServerResponse(int fd, FDMultiplexer::funcparam_t&); |
09e6702a | 255 | |
d7dae798 BH |
256 | void setSocketBuffer(int fd, int optname, uint32_t size) |
257 | { | |
258 | uint32_t psize=0; | |
259 | socklen_t len=sizeof(psize); | |
260 | ||
261 | if(!getsockopt(fd, SOL_SOCKET, optname, (char*)&psize, &len) && psize > size) { | |
262 | L<<Logger::Error<<"Not decreasing socket buffer size from "<<psize<<" to "<<size<<endl; | |
263 | return; | |
264 | } | |
265 | ||
266 | if (setsockopt(fd, SOL_SOCKET, optname, (char*)&size, sizeof(size)) < 0 ) | |
267 | L<<Logger::Error<<"Warning: unable to raise socket buffer size to "<<size<<": "<<strerror(errno)<<endl; | |
268 | } | |
269 | ||
270 | ||
271 | static void setSocketReceiveBuffer(int fd, uint32_t size) | |
272 | { | |
273 | setSocketBuffer(fd, SO_RCVBUF, size); | |
274 | } | |
275 | ||
276 | static void setSocketSendBuffer(int fd, uint32_t size) | |
277 | { | |
278 | setSocketBuffer(fd, SO_SNDBUF, size); | |
279 | } | |
280 | ||
281 | ||
4ef015cd BH |
282 | // you can ask this class for a UDP socket to send a query from |
283 | // this socket is not yours, don't even think about deleting it | |
284 | // but after you call 'returnSocket' on it, don't assume anything anymore | |
285 | class UDPClientSocks | |
286 | { | |
4ef015cd | 287 | unsigned int d_numsocks; |
4ef015cd | 288 | public: |
e2642526 | 289 | UDPClientSocks() : d_numsocks(0) |
4ef015cd BH |
290 | { |
291 | } | |
292 | ||
996c89cc | 293 | typedef set<int> socks_t; |
4ef015cd BH |
294 | socks_t d_socks; |
295 | ||
d8f6d49f BH |
296 | // returning -1 means: temporary OS error (ie, out of files), -2 means OS error |
297 | int getSocket(const ComboAddress& toaddr, int* fd) | |
4ef015cd | 298 | { |
d8f6d49f BH |
299 | *fd=makeClientSocket(toaddr.sin4.sin_family); |
300 | if(*fd < 0) // temporary error - receive exception otherwise | |
301 | return -1; | |
302 | ||
303 | if(connect(*fd, (struct sockaddr*)(&toaddr), toaddr.getSocklen()) < 0) { | |
304 | int err = errno; | |
41ff43f8 BH |
305 | // returnSocket(*fd); |
306 | Utility::closesocket(*fd); | |
d8f6d49f | 307 | if(err==ENETUNREACH) // Seth "My Interfaces Are Like A Yo Yo" Arnold special |
4957a608 | 308 | return -2; |
998a4334 | 309 | return -1; |
d8f6d49f | 310 | } |
998a4334 | 311 | |
d8f6d49f | 312 | d_socks.insert(*fd); |
998a4334 | 313 | d_numsocks++; |
d8f6d49f | 314 | return 0; |
4ef015cd BH |
315 | } |
316 | ||
095c3045 BH |
317 | void returnSocket(int fd) |
318 | { | |
319 | socks_t::iterator i=d_socks.find(fd); | |
34801ab1 | 320 | if(i==d_socks.end()) { |
3f81d239 | 321 | throw PDNSException("Trying to return a socket (fd="+lexical_cast<string>(fd)+") not in the pool"); |
34801ab1 | 322 | } |
bb4bdbaf | 323 | returnSocketLocked(i); |
095c3045 BH |
324 | } |
325 | ||
4ef015cd | 326 | // return a socket to the pool, or simply erase it |
bb4bdbaf | 327 | void returnSocketLocked(socks_t::iterator& i) |
4ef015cd | 328 | { |
600fc20b | 329 | if(i==d_socks.end()) { |
3f81d239 | 330 | throw PDNSException("Trying to return a socket not in the pool"); |
600fc20b | 331 | } |
80baf329 | 332 | try { |
bb4bdbaf | 333 | t_fdm->removeReadFD(*i); |
80baf329 BH |
334 | } |
335 | catch(FDMultiplexerException& e) { | |
bb4bdbaf | 336 | // we sometimes return a socket that has not yet been assigned to t_fdm |
80baf329 | 337 | } |
c038218b | 338 | Utility::closesocket(*i); |
998a4334 BH |
339 | |
340 | d_socks.erase(i++); | |
341 | --d_numsocks; | |
4ef015cd | 342 | } |
d8f6d49f BH |
343 | |
344 | // returns -1 for errors which might go away, throws for ones that won't | |
bb4bdbaf | 345 | static int makeClientSocket(int family) |
d8f6d49f | 346 | { |
a903b39c | 347 | int ret=(int)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 | 348 | |
d8f6d49f BH |
349 | if(ret < 0 && errno==EMFILE) // this is not a catastrophic error |
350 | return ret; | |
351 | ||
352 | if(ret<0) | |
3f81d239 | 353 | throw PDNSException("Making a socket for resolver (family = "+lexical_cast<string>(family)+"): "+stringerror()); |
36855b53 BH |
354 | |
355 | Utility::setCloseOnExec(ret); | |
5a38281c | 356 | |
d8f6d49f BH |
357 | int tries=10; |
358 | while(--tries) { | |
1652a63e BH |
359 | uint16_t port; |
360 | ||
d8f6d49f | 361 | if(tries==1) // fall back to kernel 'random' |
4957a608 | 362 | port = 0; |
1652a63e BH |
363 | else |
364 | port = 1025 + dns_random(64510); | |
365 | ||
366 | ComboAddress sin=getQueryLocalAddress(family, port); // does htons for us | |
5a38281c | 367 | |
5a38281c | 368 | if (::bind(ret, (struct sockaddr *)&sin, sin.getSocklen()) >= 0) |
4957a608 | 369 | break; |
d8f6d49f BH |
370 | } |
371 | if(!tries) | |
3f81d239 | 372 | throw PDNSException("Resolver binding to local query client socket: "+stringerror()); |
d8f6d49f BH |
373 | |
374 | Utility::setNonBlocking(ret); | |
375 | return ret; | |
376 | } | |
49a699c4 BH |
377 | }; |
378 | ||
379 | static __thread UDPClientSocks* t_udpclientsocks; | |
4ef015cd | 380 | |
288f4aa9 | 381 | /* these two functions are used by LWRes */ |
34801ab1 | 382 | // -2 is OS error, -1 is error that depends on the remote, > 0 is success |
787e5eab | 383 | int asendto(const char *data, int len, int flags, |
4957a608 | 384 | const ComboAddress& toaddr, uint16_t id, const string& domain, uint16_t qtype, int* fd) |
288f4aa9 | 385 | { |
34801ab1 BH |
386 | |
387 | PacketID pident; | |
787e5eab BH |
388 | pident.domain = domain; |
389 | pident.remote = toaddr; | |
390 | pident.type = qtype; | |
34801ab1 BH |
391 | |
392 | // see if there is an existing outstanding request we can chain on to, using partial equivalence function | |
393 | pair<MT_t::waiters_t::iterator, MT_t::waiters_t::iterator> chain=MT->d_waiters.equal_range(pident, PacketIDBirthdayCompare()); | |
394 | ||
395 | for(; chain.first != chain.second; chain.first++) { | |
396 | if(chain.first->key.fd > -1) { // don't chain onto existing chained waiter! | |
e27e91a8 | 397 | /* |
4665c31e BH |
398 | cerr<<"Orig: "<<pident.domain<<", "<<pident.remote.toString()<<", id="<<id<<endl; |
399 | cerr<<"Had hit: "<< chain.first->key.domain<<", "<<chain.first->key.remote.toString()<<", id="<<chain.first->key.id | |
4957a608 | 400 | <<", count="<<chain.first->key.chain.size()<<", origfd: "<<chain.first->key.fd<<endl; |
e27e91a8 | 401 | */ |
34801ab1 BH |
402 | chain.first->key.chain.insert(id); // we can chain |
403 | *fd=-1; // gets used in waitEvent / sendEvent later on | |
404 | return 1; | |
405 | } | |
406 | } | |
407 | ||
49a699c4 | 408 | int ret=t_udpclientsocks->getSocket(toaddr, fd); |
d8f6d49f BH |
409 | if(ret < 0) |
410 | return ret; | |
34801ab1 | 411 | |
998a4334 BH |
412 | pident.fd=*fd; |
413 | pident.id=id; | |
998a4334 | 414 | |
bb4bdbaf BH |
415 | t_fdm->addReadFD(*fd, handleUDPServerResponse, pident); |
416 | ret = send(*fd, data, len, 0); | |
417 | ||
5b0ddd18 | 418 | int tmp = errno; |
bb4bdbaf | 419 | |
7302ed0a | 420 | if(ret < 0) |
49a699c4 | 421 | t_udpclientsocks->returnSocket(*fd); |
bb4bdbaf | 422 | |
5b0ddd18 | 423 | errno = tmp; // this is for logging purposes only |
7302ed0a | 424 | return ret; |
288f4aa9 BH |
425 | } |
426 | ||
9170fbaf | 427 | // -1 is error, 0 is timeout, 1 is success |
787e5eab | 428 | int arecvfrom(char *data, int len, int flags, const ComboAddress& fromaddr, int *d_len, |
4957a608 | 429 | uint16_t id, const string& domain, uint16_t qtype, int fd, struct timeval* now) |
288f4aa9 | 430 | { |
0d5f0a9f BH |
431 | static optional<unsigned int> nearMissLimit; |
432 | if(!nearMissLimit) | |
433 | nearMissLimit=::arg().asNum("spoof-nearmiss-max"); | |
434 | ||
288f4aa9 | 435 | PacketID pident; |
4ef015cd | 436 | pident.fd=fd; |
288f4aa9 | 437 | pident.id=id; |
0d5f0a9f | 438 | pident.domain=domain; |
787e5eab | 439 | pident.type = qtype; |
996c89cc | 440 | pident.remote=fromaddr; |
b636533b | 441 | |
288f4aa9 | 442 | string packet; |
5b0ddd18 | 443 | int ret=MT->waitEvent(pident, &packet, g_networkTimeoutMsec, now); |
34801ab1 | 444 | |
9170fbaf | 445 | if(ret > 0) { |
996c89cc | 446 | if(packet.empty()) // means "error" |
998a4334 | 447 | return -1; |
998a4334 | 448 | |
705f31ae | 449 | *d_len=(int)packet.size(); |
9170fbaf | 450 | memcpy(data,packet.c_str(),min(len,*d_len)); |
0d5f0a9f | 451 | if(*nearMissLimit && pident.nearMisses > *nearMissLimit) { |
996c89cc | 452 | L<<Logger::Error<<"Too many ("<<pident.nearMisses<<" > "<<*nearMissLimit<<") bogus answers for '"<<domain<<"' from "<<fromaddr.toString()<<", assuming spoof attempt."<<endl; |
0d5f0a9f | 453 | g_stats.spoofCount++; |
35ce8576 BH |
454 | return -1; |
455 | } | |
288f4aa9 | 456 | } |
09e6702a | 457 | else { |
34801ab1 | 458 | if(fd >= 0) |
49a699c4 | 459 | t_udpclientsocks->returnSocket(fd); |
09e6702a | 460 | } |
9170fbaf | 461 | return ret; |
288f4aa9 BH |
462 | } |
463 | ||
aa4e4cbf | 464 | |
87a5ea63 | 465 | string s_pidfname; |
88def049 BH |
466 | static void writePid(void) |
467 | { | |
18e7758c | 468 | ofstream of(s_pidfname.c_str(), std::ios_base::app); |
88def049 | 469 | if(of) |
705f31ae | 470 | of<< Utility::getpid() <<endl; |
88def049 | 471 | else |
87a5ea63 | 472 | L<<Logger::Error<<"Requested to write pid for "<<Utility::getpid()<<" to "<<s_pidfname<<" failed: "<<strerror(errno)<<endl; |
88def049 BH |
473 | } |
474 | ||
bd0289fc BH |
475 | typedef map<ComboAddress, uint32_t, ComboAddress::addressOnlyLessThan> tcpClientCounts_t; |
476 | tcpClientCounts_t __thread* t_tcpClientCounts; | |
0e9d9ce2 | 477 | |
cd989c87 BH |
478 | TCPConnection::TCPConnection(int fd, const ComboAddress& addr) : d_remote(addr), d_fd(fd) |
479 | { | |
1bc9e6bd | 480 | ++s_currentConnections; |
cd989c87 | 481 | (*t_tcpClientCounts)[d_remote]++; |
0e408828 | 482 | } |
cd989c87 BH |
483 | |
484 | TCPConnection::~TCPConnection() | |
0e408828 | 485 | { |
cd989c87 BH |
486 | if(Utility::closesocket(d_fd) < 0) |
487 | unixDie("closing socket for TCPConnection"); | |
488 | if(t_tcpClientCounts->count(d_remote) && !(*t_tcpClientCounts)[d_remote]--) | |
489 | t_tcpClientCounts->erase(d_remote); | |
1bc9e6bd | 490 | --s_currentConnections; |
0e408828 | 491 | } |
0e9d9ce2 | 492 | |
1bc9e6bd | 493 | AtomicCounter TCPConnection::s_currentConnections; |
d8f6d49f | 494 | void handleRunningTCPQuestion(int fd, FDMultiplexer::funcparam_t& var); |
6dcd28c3 | 495 | |
92011b8f | 496 | // the idea is, only do things that depend on the *response* here. Incoming accounting is on incoming. |
497 | void updateResponseStats(int res, const ComboAddress& remote, unsigned int packetsize, const std::string* query, uint16_t qtype) | |
2cc13433 | 498 | { |
92011b8f | 499 | if(packetsize > 1000 && t_largeanswerremotes) |
500 | t_largeanswerremotes->push_back(remote); | |
2cc13433 BH |
501 | switch(res) { |
502 | case RCode::ServFail: | |
92011b8f | 503 | if(t_servfailremotes) { |
504 | t_servfailremotes->push_back(remote); | |
505 | if(query) // packet cache | |
506 | t_servfailqueryring->push_back(make_pair(*query, qtype)); | |
507 | } | |
2cc13433 BH |
508 | g_stats.servFails++; |
509 | break; | |
510 | case RCode::NXDomain: | |
511 | g_stats.nxDomains++; | |
512 | break; | |
513 | case RCode::NoError: | |
514 | g_stats.noErrors++; | |
515 | break; | |
516 | } | |
517 | } | |
518 | ||
79332bff F |
519 | ResponseStats g_rs; |
520 | ||
a903b39c | 521 | static string makeLoginfo(DNSComboWriter* dc) |
522 | try | |
523 | { | |
524 | return "("+dc->d_mdp.d_qname+"/"+DNSRecordContent::NumberToType(dc->d_mdp.d_qtype)+" from "+(dc->d_remote.toString())+")"; | |
525 | } | |
526 | catch(...) | |
527 | { | |
528 | return "Exception making error message for exception"; | |
529 | } | |
530 | ||
288f4aa9 BH |
531 | void startDoResolve(void *p) |
532 | { | |
7b1469bb | 533 | DNSComboWriter* dc=(DNSComboWriter *)p; |
288f4aa9 | 534 | try { |
92011b8f | 535 | t_queryring->push_back(make_pair(dc->d_mdp.d_qname, dc->d_mdp.d_qtype)); |
536 | ||
b18ace73 | 537 | uint32_t maxanswersize= dc->d_tcp ? 65535 : min((uint16_t) 512, g_udpTruncationThreshold); |
7f7b8d55 | 538 | EDNSOpts edo; |
56b4d21b | 539 | if(getEDNSOpts(dc->d_mdp, &edo) && !dc->d_tcp) { |
b18ace73 | 540 | maxanswersize = min(edo.d_packetsize, g_udpTruncationThreshold); |
10321a98 | 541 | } |
84433b79 | 542 | ComboAddress local; |
543 | listenSocketsAddresses_t::const_iterator lociter; | |
ea634573 | 544 | vector<DNSResourceRecord> ret; |
ea634573 | 545 | vector<uint8_t> packet; |
b23b8614 BH |
546 | |
547 | DNSPacketWriter pw(packet, dc->d_mdp.d_qname, dc->d_mdp.d_qtype, dc->d_mdp.d_qclass); | |
ea634573 BH |
548 | |
549 | pw.getHeader()->aa=0; | |
550 | pw.getHeader()->ra=1; | |
c154c8a4 | 551 | pw.getHeader()->qr=1; |
bb4bdbaf | 552 | pw.getHeader()->tc=0; |
ea634573 | 553 | pw.getHeader()->id=dc->d_mdp.d_header.id; |
10321a98 | 554 | pw.getHeader()->rd=dc->d_mdp.d_header.rd; |
ea634573 | 555 | |
904d3219 PD |
556 | uint32_t minTTL=std::numeric_limits<uint32_t>::max(); |
557 | ||
558 | SyncRes sr(dc->d_now); | |
3457a2a0 | 559 | if(t_pdl) { |
560 | sr.setLuaEngine(*t_pdl); | |
4ea94941 | 561 | sr.d_requestor=dc->d_remote; |
3457a2a0 | 562 | } |
904d3219 PD |
563 | bool tracedQuery=false; // we could consider letting Lua know about this too |
564 | bool variableAnswer = false; | |
565 | ||
56b4d21b PD |
566 | int res; |
567 | ||
e661a20b | 568 | if(dc->d_mdp.d_qtype==QType::ANY && !dc->d_tcp && g_anyToTcp) { |
56b4d21b PD |
569 | pw.getHeader()->tc = 1; |
570 | res = 0; | |
571 | variableAnswer = true; | |
e661a20b PD |
572 | goto sendit; |
573 | } | |
574 | ||
77499b05 BH |
575 | if(t_traceRegex->get() && (*t_traceRegex)->match(dc->d_mdp.d_qname)) { |
576 | sr.setLogMode(SyncRes::Store); | |
577 | tracedQuery=true; | |
578 | } | |
579 | ||
580 | if(!g_quiet || tracedQuery) | |
461df9d2 | 581 | L<<Logger::Warning<<t_id<<" ["<<MT->getTid()<<"/"<<MT->numProcesses()<<"] " << (dc->d_tcp ? "TCP " : "") << "question for '"<<dc->d_mdp.d_qname<<"|" |
8a63d3ce | 582 | <<DNSRecordContent::NumberToType(dc->d_mdp.d_qtype)<<"' from "<<dc->getRemote()<<endl; |
c75a6a9e | 583 | |
fededf47 | 584 | sr.setId(MT->getTid()); |
67828389 | 585 | if(!dc->d_mdp.d_header.rd) |
c836dc19 BH |
586 | sr.setCacheOnly(); |
587 | ||
84433b79 | 588 | local.sin4.sin_family = dc->d_remote.sin4.sin_family; |
589 | ||
590 | lociter = g_listenSocketsAddresses.find(dc->d_socket); | |
591 | if(lociter != g_listenSocketsAddresses.end()) { | |
592 | local = lociter->second; | |
593 | } | |
594 | else { | |
595 | socklen_t len = local.getSocklen(); | |
596 | getsockname(dc->d_socket, (sockaddr*)&local, &len); // if this fails, we're ok with it | |
597 | } | |
598 | ||
599 | // if there is a RecursorLua active, and it 'took' the query in preResolve, we don't launch beginResolve | |
600 | if(!t_pdl->get() || !(*t_pdl)->preresolve(dc->d_remote, local, dc->d_mdp.d_qname, QType(dc->d_mdp.d_qtype), ret, res, &variableAnswer)) { | |
44971ca0 PD |
601 | try { |
602 | res = sr.beginResolve(dc->d_mdp.d_qname, QType(dc->d_mdp.d_qtype), dc->d_mdp.d_qclass, ret); | |
603 | } | |
604 | catch(ImmediateServFailException &e) { | |
854d44e3 | 605 | if(g_logCommonErrors) |
606 | L<<Logger::Notice<<"Sending SERVFAIL to "<<dc->getRemote()<<" during resolve of '"<<dc->d_mdp.d_qname<<"' because: "<<e.reason<<endl; | |
44971ca0 PD |
607 | res = RCode::ServFail; |
608 | } | |
4485aa35 | 609 | |
674cf0f6 | 610 | if(t_pdl->get()) { |
bd53ea9d | 611 | if(res == RCode::NoError) { |
232f0877 CH |
612 | vector<DNSResourceRecord>::const_iterator i; |
613 | for(i=ret.begin(); i!=ret.end(); ++i) | |
614 | if(i->qtype.getCode() == dc->d_mdp.d_qtype && i->d_place == DNSResourceRecord::ANSWER) | |
615 | break; | |
616 | if(i == ret.end()) | |
84433b79 | 617 | (*t_pdl)->nodata(dc->d_remote,local, dc->d_mdp.d_qname, QType(dc->d_mdp.d_qtype), ret, res, &variableAnswer); |
232f0877 CH |
618 | } |
619 | else if(res == RCode::NXDomain) | |
84433b79 | 620 | (*t_pdl)->nxdomain(dc->d_remote,local, dc->d_mdp.d_qname, QType(dc->d_mdp.d_qtype), ret, res, &variableAnswer); |
bd53ea9d | 621 | |
84433b79 | 622 | (*t_pdl)->postresolve(dc->d_remote,local, dc->d_mdp.d_qname, QType(dc->d_mdp.d_qtype), ret, res, &variableAnswer); |
d2322a5e | 623 | } |
4485aa35 | 624 | } |
99c69ed3 | 625 | |
25456896 | 626 | if(res == RecursorBehaviour::DROP) { |
e9c2ad3a | 627 | g_stats.policyDrops++; |
ae7e77ad | 628 | delete dc; |
629 | dc=0; | |
630 | return; | |
631 | } | |
25456896 | 632 | if(tracedQuery || res == RecursorBehaviour::PASS || res == RCode::ServFail || pw.getHeader()->rcode == RCode::ServFail) |
85ffbc53 | 633 | { |
85ffbc53 PD |
634 | string trace(sr.getTrace()); |
635 | if(!trace.empty()) { | |
636 | vector<string> lines; | |
637 | boost::split(lines, trace, boost::is_any_of("\n")); | |
638 | BOOST_FOREACH(const string& line, lines) { | |
639 | if(!line.empty()) | |
640 | L<<Logger::Warning<< line << endl; | |
641 | } | |
642 | } | |
643 | } | |
79332bff | 644 | |
25456896 | 645 | if(res == RecursorBehaviour::PASS) { |
0fe1d080 PD |
646 | pw.getHeader()->rcode=RCode::ServFail; |
647 | // no commit here, because no record | |
648 | g_stats.servFails++; | |
649 | } | |
288f4aa9 | 650 | else { |
ea634573 | 651 | pw.getHeader()->rcode=res; |
92011b8f | 652 | |
77499b05 | 653 | |
c154c8a4 | 654 | if(ret.size()) { |
92476c8b | 655 | orderAndShuffle(ret); |
4957a608 BH |
656 | for(vector<DNSResourceRecord>::const_iterator i=ret.begin(); i!=ret.end(); ++i) { |
657 | pw.startRecord(i->qname, i->qtype.getCode(), i->ttl, i->qclass, (DNSPacketWriter::Place)i->d_place); | |
658 | minTTL = min(minTTL, i->ttl); | |
659 | if(i->qtype.getCode() == QType::A) { // blast out A record w/o doing whole dnswriter thing | |
660 | uint32_t ip=0; | |
661 | IpToU32(i->content, &ip); | |
662 | pw.xfr32BitInt(htonl(ip)); | |
663 | } else { | |
664 | shared_ptr<DNSRecordContent> drc(DNSRecordContent::mastermake(i->qtype.getCode(), i->qclass, i->content)); | |
665 | drc->toPacket(pw); | |
666 | } | |
dffbaa08 | 667 | if(pw.size() > maxanswersize) { |
4957a608 BH |
668 | pw.rollback(); |
669 | if(i->d_place==DNSResourceRecord::ANSWER) // only truncate if we actually omitted parts of the answer | |
add935a2 | 670 | { |
4957a608 | 671 | pw.getHeader()->tc=1; |
add935a2 PD |
672 | pw.truncate(); |
673 | } | |
4957a608 BH |
674 | goto sendit; // need to jump over pw.commit |
675 | } | |
676 | } | |
b23b8614 | 677 | |
18af64a8 | 678 | pw.commit(); |
ea634573 | 679 | } |
288f4aa9 | 680 | } |
10321a98 | 681 | sendit:; |
79332bff | 682 | g_rs.submitResponse(dc->d_mdp.d_qtype, packet.size(), !dc->d_tcp); |
92011b8f | 683 | updateResponseStats(res, dc->d_remote, packet.size(), &dc->d_mdp.d_qname, dc->d_mdp.d_qtype); |
ea634573 | 684 | if(!dc->d_tcp) { |
b71b60ee | 685 | struct msghdr msgh; |
686 | struct iovec iov; | |
687 | char cbuf[256]; | |
688 | fillMSGHdr(&msgh, &iov, cbuf, 0, (char*)&*packet.begin(), packet.size(), &dc->d_remote); | |
689 | if(dc->d_local.sin4.sin_family) | |
690 | addCMsgSrcAddr(&msgh, cbuf, &dc->d_local); | |
691 | sendmsg(dc->d_socket, &msgh, 0); | |
99c69ed3 | 692 | if(!SyncRes::s_nopacketcache && !variableAnswer ) { |
79332bff F |
693 | t_packetCache->insertResponsePacket(string((const char*)&*packet.begin(), packet.size()), |
694 | g_now.tv_sec, | |
695 | min(minTTL, | |
696 | (pw.getHeader()->rcode == RCode::ServFail) ? SyncRes::s_packetcacheservfailttl : SyncRes::s_packetcachettl | |
697 | ) | |
698 | ); | |
1051f8a9 | 699 | } |
feccc9fc | 700 | } |
9c495589 BH |
701 | else { |
702 | char buf[2]; | |
ea634573 BH |
703 | buf[0]=packet.size()/256; |
704 | buf[1]=packet.size()%256; | |
feccc9fc | 705 | |
c038218b | 706 | Utility::iovec iov[2]; |
feccc9fc | 707 | |
ea634573 BH |
708 | iov[0].iov_base=(void*)buf; iov[0].iov_len=2; |
709 | iov[1].iov_base=(void*)&*packet.begin(); iov[1].iov_len = packet.size(); | |
feccc9fc | 710 | |
c038218b | 711 | int ret=Utility::writev(dc->d_socket, iov, 2); |
0e9d9ce2 | 712 | bool hadError=true; |
feccc9fc | 713 | |
0e9d9ce2 | 714 | if(ret == 0) |
18af64a8 | 715 | L<<Logger::Error<<"EOF writing TCP answer to "<<dc->getRemote()<<endl; |
0e9d9ce2 | 716 | else if(ret < 0 ) |
18af64a8 | 717 | L<<Logger::Error<<"Error writing TCP answer to "<<dc->getRemote()<<": "<< strerror(errno) <<endl; |
ea634573 | 718 | else if((unsigned int)ret != 2 + packet.size()) |
18af64a8 | 719 | L<<Logger::Error<<"Oops, partial answer sent to "<<dc->getRemote()<<" for "<<dc->d_mdp.d_qname<<" (size="<< (2 + packet.size()) <<", sent "<<ret<<")"<<endl; |
0e9d9ce2 | 720 | else |
18af64a8 | 721 | hadError=false; |
09e6702a BH |
722 | |
723 | // update tcp connection status, either by closing or moving to 'BYTE0' | |
18af64a8 | 724 | |
09e6702a | 725 | if(hadError) { |
18af64a8 | 726 | // no need to remove us from FDM, we weren't there |
c36bc97a | 727 | dc->d_socket = -1; |
09e6702a | 728 | } |
a6ae6414 | 729 | else { |
cd989c87 | 730 | dc->d_tcpConnection->state=TCPConnection::BYTE0; |
18af64a8 | 731 | Utility::gettimeofday(&g_now, 0); // needs to be updated |
cd989c87 BH |
732 | t_fdm->addReadFD(dc->d_socket, handleRunningTCPQuestion, dc->d_tcpConnection); |
733 | t_fdm->setReadTTD(dc->d_socket, g_now, g_tcpTimeout); | |
0e9d9ce2 | 734 | } |
9c495589 | 735 | } |
b23b8614 | 736 | |
1d5b3ce6 | 737 | if(!g_quiet) { |
461df9d2 | 738 | 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 | 739 | L<<"': "<<ntohs(pw.getHeader()->ancount)<<" answers, "<<ntohs(pw.getHeader()->arcount)<<" additional, took "<<sr.d_outqueries<<" packets, "<< |
18af64a8 | 740 | sr.d_throttledqueries<<" throttled, "<<sr.d_timeouts<<" timeouts, "<<sr.d_tcpoutqueries<<" tcp connections, rcode="<<res<<endl; |
c75a6a9e | 741 | } |
b23b8614 | 742 | |
49a699c4 | 743 | sr.d_outqueries ? t_RC->cacheMisses++ : t_RC->cacheHits++; |
fe213470 BH |
744 | float spent=makeFloat(sr.d_now-dc->d_now); |
745 | if(spent < 0.001) | |
746 | g_stats.answers0_1++; | |
747 | else if(spent < 0.010) | |
748 | g_stats.answers1_10++; | |
749 | else if(spent < 0.1) | |
750 | g_stats.answers10_100++; | |
751 | else if(spent < 1.0) | |
752 | g_stats.answers100_1000++; | |
753 | else | |
754 | g_stats.answersSlow++; | |
755 | ||
574af7ea | 756 | uint64_t newLat=(uint64_t)(spent*1000000); |
08f3f638 | 757 | newLat = min(newLat,(uint64_t)(g_networkTimeoutMsec*1000)); // outliers of several minutes exist.. |
758 | g_stats.avgLatencyUsec=(1-1.0/g_latencyStatSize)*g_stats.avgLatencyUsec + (float)newLat/g_latencyStatSize; | |
0a6b1027 | 759 | // no worries, we do this for packet cache hits elsewhere |
c6d04bdc | 760 | // cout<<dc->d_mdp.d_qname<<"\t"<<MT->getUsec()<<"\t"<<sr.d_outqueries<<endl; |
ea634573 | 761 | delete dc; |
c36bc97a | 762 | dc=0; |
288f4aa9 | 763 | } |
3f81d239 | 764 | catch(PDNSException &ae) { |
a903b39c | 765 | L<<Logger::Error<<"startDoResolve problem "<<makeLoginfo(dc)<<": "<<ae.reason<<endl; |
c36bc97a | 766 | delete dc; |
288f4aa9 | 767 | } |
7b1469bb | 768 | catch(MOADNSException& e) { |
a903b39c | 769 | L<<Logger::Error<<"DNS parser error "<<makeLoginfo(dc) <<": "<<dc->d_mdp.d_qname<<", "<<e.what()<<endl; |
c36bc97a | 770 | delete dc; |
7b1469bb | 771 | } |
fdbf35ac | 772 | catch(std::exception& e) { |
a903b39c | 773 | L<<Logger::Error<<"STL error "<< makeLoginfo(dc)<<": "<<e.what()<<endl; |
c36bc97a | 774 | delete dc; |
c154c8a4 | 775 | } |
288f4aa9 | 776 | catch(...) { |
a903b39c | 777 | L<<Logger::Error<<"Any other exception in a resolver context "<< makeLoginfo(dc) <<endl; |
288f4aa9 | 778 | } |
ec6eacbc BH |
779 | |
780 | g_stats.maxMThreadStackUsage = max(MT->getMaxStackUsage(), g_stats.maxMThreadStackUsage); | |
288f4aa9 BH |
781 | } |
782 | ||
677e2a46 | 783 | void makeControlChannelSocket(int processNum=-1) |
1d5b3ce6 | 784 | { |
2d733c0f | 785 | string sockname=::arg()["socket-dir"]+"/"+s_programname; |
677e2a46 BH |
786 | if(processNum >= 0) |
787 | sockname += "."+lexical_cast<string>(processNum); | |
788 | sockname+=".controlsocket"; | |
41f7a068 | 789 | s_rcc.listen(sockname); |
387de317 | 790 | |
387de317 BH |
791 | int sockowner = -1; |
792 | int sockgroup = -1; | |
793 | ||
794 | if (!::arg().isEmpty("socket-group")) | |
795 | sockgroup=::arg().asGid("socket-group"); | |
796 | if (!::arg().isEmpty("socket-owner")) | |
797 | sockowner=::arg().asUid("socket-owner"); | |
798 | ||
f838ad8d BH |
799 | if (sockgroup > -1 || sockowner > -1) { |
800 | if(chown(sockname.c_str(), sockowner, sockgroup) < 0) { | |
801 | unixDie("Failed to chown control socket"); | |
802 | } | |
803 | } | |
387de317 BH |
804 | |
805 | // do mode change if socket-mode is given | |
806 | if(!::arg().isEmpty("socket-mode")) { | |
807 | mode_t sockmode=::arg().asMode("socket-mode"); | |
808 | chmod(sockname.c_str(), sockmode); | |
809 | } | |
1d5b3ce6 BH |
810 | } |
811 | ||
d8f6d49f | 812 | void handleRunningTCPQuestion(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 813 | { |
cd989c87 | 814 | shared_ptr<TCPConnection> conn=any_cast<shared_ptr<TCPConnection> >(var); |
c038218b | 815 | |
879b3f70 | 816 | if(conn->state==TCPConnection::BYTE0) { |
cd989c87 | 817 | int bytes=recv(conn->getFD(), conn->data, 2, 0); |
09e6702a | 818 | if(bytes==1) |
667f7e60 | 819 | conn->state=TCPConnection::BYTE1; |
09e6702a | 820 | if(bytes==2) { |
a0aa4f64 | 821 | conn->qlen=(((unsigned char)conn->data[0]) << 8)+ (unsigned char)conn->data[1]; |
667f7e60 BH |
822 | conn->bytesread=0; |
823 | conn->state=TCPConnection::GETQUESTION; | |
09e6702a BH |
824 | } |
825 | if(!bytes || bytes < 0) { | |
bb4bdbaf | 826 | t_fdm->removeReadFD(fd); |
09e6702a BH |
827 | return; |
828 | } | |
829 | } | |
667f7e60 | 830 | else if(conn->state==TCPConnection::BYTE1) { |
cd989c87 | 831 | int bytes=recv(conn->getFD(), conn->data+1, 1, 0); |
09e6702a | 832 | if(bytes==1) { |
667f7e60 | 833 | conn->state=TCPConnection::GETQUESTION; |
a0aa4f64 | 834 | conn->qlen=(((unsigned char)conn->data[0]) << 8)+ (unsigned char)conn->data[1]; |
667f7e60 | 835 | conn->bytesread=0; |
09e6702a BH |
836 | } |
837 | if(!bytes || bytes < 0) { | |
838 | if(g_logCommonErrors) | |
cd989c87 | 839 | L<<Logger::Error<<"TCP client "<< conn->d_remote.toString() <<" disconnected after first byte"<<endl; |
bb4bdbaf | 840 | t_fdm->removeReadFD(fd); |
09e6702a BH |
841 | return; |
842 | } | |
843 | } | |
667f7e60 | 844 | else if(conn->state==TCPConnection::GETQUESTION) { |
cd989c87 | 845 | int bytes=recv(conn->getFD(), conn->data + conn->bytesread, conn->qlen - conn->bytesread, 0); |
09e6702a | 846 | if(!bytes || bytes < 0) { |
cd989c87 | 847 | L<<Logger::Error<<"TCP client "<< conn->d_remote.toString() <<" disconnected while reading question body"<<endl; |
bb4bdbaf | 848 | t_fdm->removeReadFD(fd); |
09e6702a BH |
849 | return; |
850 | } | |
667f7e60 BH |
851 | conn->bytesread+=bytes; |
852 | if(conn->bytesread==conn->qlen) { | |
bb4bdbaf | 853 | t_fdm->removeReadFD(fd); // should no longer awake ourselves when there is data to read |
879b3f70 | 854 | |
09e6702a BH |
855 | DNSComboWriter* dc=0; |
856 | try { | |
cd989c87 | 857 | dc=new DNSComboWriter(conn->data, conn->qlen, g_now); |
09e6702a BH |
858 | } |
859 | catch(MOADNSException &mde) { | |
4957a608 BH |
860 | g_stats.clientParseError++; |
861 | if(g_logCommonErrors) | |
cd989c87 | 862 | L<<Logger::Error<<"Unable to parse packet from TCP client "<< conn->d_remote.toString() <<endl; |
4957a608 | 863 | return; |
09e6702a | 864 | } |
cd989c87 BH |
865 | dc->d_tcpConnection = conn; // carry the torch |
866 | dc->setSocket(conn->getFD()); // this is the only time a copy is made of the actual fd | |
09e6702a | 867 | dc->d_tcp=true; |
cd989c87 | 868 | dc->setRemote(&conn->d_remote); |
879b3f70 | 869 | if(dc->d_mdp.d_header.qr) { |
4957a608 BH |
870 | delete dc; |
871 | L<<Logger::Error<<"Ignoring answer on server socket!"<<endl; | |
4957a608 | 872 | return; |
879b3f70 | 873 | } |
3abcdab2 PD |
874 | if(dc->d_mdp.d_header.opcode) { |
875 | delete dc; | |
876 | L<<Logger::Error<<"Ignoring non-query opcode on server socket!"<<endl; | |
877 | return; | |
878 | } | |
09e6702a | 879 | else { |
4957a608 BH |
880 | ++g_stats.qcounter; |
881 | ++g_stats.tcpqcounter; | |
50a5ef72 | 882 | MT->makeThread(startDoResolve, dc); // deletes dc, will set state to BYTE0 again |
4957a608 | 883 | return; |
09e6702a BH |
884 | } |
885 | } | |
886 | } | |
887 | } | |
888 | ||
6dcd28c3 | 889 | //! Handle new incoming TCP connection |
d8f6d49f | 890 | void handleNewTCPQuestion(int fd, FDMultiplexer::funcparam_t& ) |
09e6702a | 891 | { |
37d3f960 | 892 | ComboAddress addr; |
09e6702a | 893 | socklen_t addrlen=sizeof(addr); |
705f31ae | 894 | int newsock=(int)accept(fd, (struct sockaddr*)&addr, &addrlen); |
09e6702a | 895 | if(newsock>0) { |
85c32340 BH |
896 | if(MT->numProcesses() > g_maxMThreads) { |
897 | g_stats.overCapacityDrops++; | |
898 | Utility::closesocket(newsock); | |
899 | return; | |
900 | } | |
901 | ||
92011b8f | 902 | if(t_remotes) |
903 | t_remotes->push_back(addr); | |
49a699c4 | 904 | if(t_allowFrom && !t_allowFrom->match(&addr)) { |
2914b022 | 905 | if(!g_quiet) |
4957a608 | 906 | L<<Logger::Error<<"["<<MT->getTid()<<"] dropping TCP query from "<<addr.toString()<<", address not matched by allow-from"<<endl; |
2914b022 | 907 | |
09e6702a | 908 | g_stats.unauthorizedTCP++; |
705f31ae | 909 | Utility::closesocket(newsock); |
09e6702a BH |
910 | return; |
911 | } | |
bd0289fc | 912 | if(g_maxTCPPerClient && t_tcpClientCounts->count(addr) && (*t_tcpClientCounts)[addr] >= g_maxTCPPerClient) { |
09e6702a | 913 | g_stats.tcpClientOverflow++; |
705f31ae | 914 | Utility::closesocket(newsock); // don't call TCPConnection::closeAndCleanup here - did not enter it in the counts yet! |
09e6702a BH |
915 | return; |
916 | } | |
cd989c87 | 917 | |
09e6702a | 918 | Utility::setNonBlocking(newsock); |
cd989c87 BH |
919 | shared_ptr<TCPConnection> tc(new TCPConnection(newsock, addr)); |
920 | tc->state=TCPConnection::BYTE0; | |
921 | ||
922 | t_fdm->addReadFD(tc->getFD(), handleRunningTCPQuestion, tc); | |
c038218b | 923 | |
0bff046b | 924 | struct timeval now; |
c038218b | 925 | Utility::gettimeofday(&now, 0); |
cd989c87 | 926 | t_fdm->setReadTTD(tc->getFD(), now, g_tcpTimeout); |
09e6702a BH |
927 | } |
928 | } | |
2914b022 | 929 | |
b71b60ee | 930 | string* doProcessUDPQuestion(const std::string& question, const ComboAddress& fromaddr, const ComboAddress& destaddr, struct timeval tv, int fd) |
1bc3c142 | 931 | { |
b71b60ee | 932 | struct timeval diff = g_now - tv; |
933 | double delta=(diff.tv_sec*1000 + diff.tv_usec/1000.0); | |
934 | ||
935 | if(delta > 1000.0) { | |
936 | g_stats.tooOldDrops++; | |
937 | return 0; | |
938 | } | |
939 | ||
1bc3c142 | 940 | ++g_stats.qcounter; |
d7f10541 BH |
941 | if(fromaddr.sin4.sin_family==AF_INET6) |
942 | g_stats.ipv6qcounter++; | |
1bc3c142 BH |
943 | |
944 | string response; | |
945 | try { | |
946 | uint32_t age; | |
947 | if(!SyncRes::s_nopacketcache && t_packetCache->getResponsePacket(question, g_now.tv_sec, &response, &age)) { | |
948 | if(!g_quiet) | |
d738f00f | 949 | L<<Logger::Notice<<t_id<< " question answered from packet cache from "<<fromaddr.toString()<<endl; |
92011b8f | 950 | // t_queryring->push_back("packetcached"); |
0a6b1027 | 951 | |
1bc3c142 BH |
952 | g_stats.packetCacheHits++; |
953 | SyncRes::s_queries++; | |
954 | ageDNSPacket(response, age); | |
b71b60ee | 955 | struct msghdr msgh; |
956 | struct iovec iov; | |
957 | char cbuf[256]; | |
958 | fillMSGHdr(&msgh, &iov, cbuf, 0, (char*)response.c_str(), response.length(), const_cast<ComboAddress*>(&fromaddr)); | |
959 | if(destaddr.sin4.sin_family) { | |
b71b60ee | 960 | addCMsgSrcAddr(&msgh, cbuf, &destaddr); |
961 | } | |
962 | sendmsg(fd, &msgh, 0); | |
963 | ||
97bee66d BH |
964 | if(response.length() >= sizeof(struct dnsheader)) { |
965 | struct dnsheader dh; | |
966 | memcpy(&dh, response.c_str(), sizeof(dh)); | |
92011b8f | 967 | updateResponseStats(dh.rcode, fromaddr, response.length(), 0, 0); |
97bee66d | 968 | } |
08f3f638 | 969 | g_stats.avgLatencyUsec=(1-1.0/g_latencyStatSize)*g_stats.avgLatencyUsec + 0.0; // we assume 0 usec |
1bc3c142 BH |
970 | return 0; |
971 | } | |
972 | } | |
973 | catch(std::exception& e) { | |
974 | L<<Logger::Error<<"Error processing or aging answer packet: "<<e.what()<<endl; | |
975 | return 0; | |
976 | } | |
977 | ||
4ea94941 | 978 | if(t_pdl->get()) { |
979 | if((*t_pdl)->ipfilter(fromaddr, destaddr)) { | |
980 | if(!g_quiet) | |
981 | L<<Logger::Notice<<t_id<<" ["<<MT->getTid()<<"/"<<MT->numProcesses()<<"] DROPPED question from "<<fromaddr.toStringWithPort()<<" based on policy"<<endl; | |
982 | g_stats.policyDrops++; | |
983 | return 0; | |
984 | } | |
985 | } | |
986 | ||
1bc3c142 | 987 | if(MT->numProcesses() > g_maxMThreads) { |
461df9d2 | 988 | if(!g_quiet) |
854d44e3 | 989 | L<<Logger::Notice<<t_id<<" ["<<MT->getTid()<<"/"<<MT->numProcesses()<<"] DROPPED question from "<<fromaddr.toStringWithPort()<<", over capacity"<<endl; |
461df9d2 | 990 | |
1bc3c142 BH |
991 | g_stats.overCapacityDrops++; |
992 | return 0; | |
993 | } | |
994 | ||
995 | DNSComboWriter* dc = new DNSComboWriter(question.c_str(), question.size(), g_now); | |
996 | dc->setSocket(fd); | |
997 | dc->setRemote(&fromaddr); | |
b71b60ee | 998 | dc->setLocal(destaddr); |
1bc3c142 BH |
999 | |
1000 | dc->d_tcp=false; | |
1001 | MT->makeThread(startDoResolve, (void*) dc); // deletes dc | |
1002 | return 0; | |
1003 | } | |
1004 | ||
b71b60ee | 1005 | |
d8f6d49f | 1006 | void handleNewUDPQuestion(int fd, FDMultiplexer::funcparam_t& var) |
5db529f8 | 1007 | { |
a9af3782 | 1008 | int len; |
5db529f8 BH |
1009 | char data[1500]; |
1010 | ComboAddress fromaddr; | |
b71b60ee | 1011 | struct msghdr msgh; |
1012 | struct iovec iov; | |
1013 | char cbuf[256]; | |
1014 | ||
1015 | fromaddr.sin6.sin6_family=AF_INET6; // this makes sure fromaddr is big enough | |
1016 | fillMSGHdr(&msgh, &iov, cbuf, sizeof(cbuf), data, sizeof(data), &fromaddr); | |
1017 | ||
bf3b0cec | 1018 | for(;;) |
b71b60ee | 1019 | if((len=recvmsg(fd, &msgh, 0)) >= 0) { |
92011b8f | 1020 | if(t_remotes) |
1021 | t_remotes->push_back(fromaddr); | |
b23b8614 | 1022 | |
49a699c4 | 1023 | if(t_allowFrom && !t_allowFrom->match(&fromaddr)) { |
2914b022 | 1024 | if(!g_quiet) |
4957a608 | 1025 | L<<Logger::Error<<"["<<MT->getTid()<<"] dropping UDP query from "<<fromaddr.toString()<<", address not matched by allow-from"<<endl; |
2914b022 | 1026 | |
5db529f8 | 1027 | g_stats.unauthorizedUDP++; |
a9af3782 | 1028 | return; |
5db529f8 | 1029 | } |
15c01deb | 1030 | BOOST_STATIC_ASSERT(offsetof(sockaddr_in, sin_port) == offsetof(sockaddr_in6, sin6_port)); |
81859ba5 | 1031 | if(!fromaddr.sin4.sin_port) { // also works for IPv6 |
1032 | if(!g_quiet) | |
1033 | L<<Logger::Error<<"["<<MT->getTid()<<"] dropping UDP query from "<<fromaddr.toStringWithPort()<<", can't deal with port 0"<<endl; | |
1034 | ||
1035 | g_stats.clientParseError++; // not quite the best place to put it, but needs to go somewhere | |
1036 | return; | |
1037 | } | |
5db529f8 | 1038 | try { |
b23b8614 | 1039 | dnsheader* dh=(dnsheader*)data; |
5db529f8 | 1040 | |
b23b8614 | 1041 | if(dh->qr) { |
4957a608 BH |
1042 | if(g_logCommonErrors) |
1043 | L<<Logger::Error<<"Ignoring answer from "<<fromaddr.toString()<<" on server socket!"<<endl; | |
5db529f8 | 1044 | } |
3abcdab2 PD |
1045 | else if(dh->opcode) { |
1046 | if(g_logCommonErrors) | |
1047 | L<<Logger::Error<<"Ignoring non-query opcode "<<dh->opcode<<" from "<<fromaddr.toString()<<" on server socket!"<<endl; | |
1048 | } | |
5db529f8 | 1049 | else { |
232f0877 | 1050 | string question(data, len); |
b71b60ee | 1051 | struct timeval tv={0,0}; |
1052 | HarvestTimestamp(&msgh, &tv); | |
1053 | ComboAddress dest; | |
1054 | memset(&dest, 0, sizeof(dest)); // this makes sure we igore this address if not returned by recvmsg above | |
1055 | HarvestDestinationAddress(&msgh, &dest); | |
232f0877 | 1056 | if(g_weDistributeQueries) |
b71b60ee | 1057 | distributeAsyncFunction(question, boost::bind(doProcessUDPQuestion, question, fromaddr, dest, tv, fd)); |
232f0877 | 1058 | else |
b71b60ee | 1059 | doProcessUDPQuestion(question, fromaddr, dest, tv, fd); |
5db529f8 BH |
1060 | } |
1061 | } | |
1062 | catch(MOADNSException& mde) { | |
1063 | g_stats.clientParseError++; | |
84e66a59 | 1064 | if(g_logCommonErrors) |
4957a608 | 1065 | L<<Logger::Error<<"Unable to parse packet from remote UDP client "<<fromaddr.toString() <<": "<<mde.what()<<endl; |
5db529f8 BH |
1066 | } |
1067 | } | |
ac0e821b BH |
1068 | else { |
1069 | // cerr<<t_id<<" had error: "<<stringerror()<<endl; | |
bf3b0cec | 1070 | if(errno == EAGAIN) |
9326cae1 | 1071 | g_stats.noPacketError++; |
bf3b0cec | 1072 | break; |
ac0e821b | 1073 | } |
5db529f8 BH |
1074 | } |
1075 | ||
1bc3c142 | 1076 | |
5db529f8 BH |
1077 | typedef vector<pair<int, function< void(int, any&) > > > deferredAdd_t; |
1078 | deferredAdd_t deferredAdd; | |
1079 | ||
f28307ad | 1080 | void makeTCPServerSockets() |
9c495589 | 1081 | { |
37d3f960 | 1082 | int fd; |
f28307ad | 1083 | vector<string>locals; |
2e3d8a19 | 1084 | stringtok(locals,::arg()["local-address"]," ,"); |
9c495589 | 1085 | |
f28307ad | 1086 | if(locals.empty()) |
3f81d239 | 1087 | throw PDNSException("No local address specified"); |
f28307ad | 1088 | |
f28307ad | 1089 | for(vector<string>::const_iterator i=locals.begin();i!=locals.end();++i) { |
32252594 BH |
1090 | ServiceTuple st; |
1091 | st.port=::arg().asNum("local-port"); | |
1092 | parseService(*i, st); | |
1093 | ||
1094 | ComboAddress sin; | |
1095 | ||
f28307ad | 1096 | memset((char *)&sin,0, sizeof(sin)); |
37d3f960 | 1097 | sin.sin4.sin_family = AF_INET; |
32252594 | 1098 | if(!IpToU32(st.host, (uint32_t*)&sin.sin4.sin_addr.s_addr)) { |
37d3f960 | 1099 | sin.sin6.sin6_family = AF_INET6; |
f71bc087 | 1100 | if(makeIPv6sockaddr(st.host, &sin.sin6) < 0) |
3f81d239 | 1101 | throw PDNSException("Unable to resolve local address for TCP server on '"+ st.host +"'"); |
37d3f960 BH |
1102 | } |
1103 | ||
1104 | fd=socket(sin.sin6.sin6_family, SOCK_STREAM, 0); | |
1105 | if(fd<0) | |
3f81d239 | 1106 | throw PDNSException("Making a TCP server socket for resolver: "+stringerror()); |
f28307ad | 1107 | |
a903b39c | 1108 | Utility::setCloseOnExec(fd); |
1109 | ||
f28307ad | 1110 | int tmp=1; |
37d3f960 | 1111 | if(setsockopt(fd,SOL_SOCKET,SO_REUSEADDR,(char*)&tmp,sizeof tmp)<0) { |
f28307ad | 1112 | L<<Logger::Error<<"Setsockopt failed for TCP listening socket"<<endl; |
c8ddb7c2 | 1113 | exit(1); |
f28307ad | 1114 | } |
0dfa94ab | 1115 | if(sin.sin6.sin6_family == AF_INET6 && setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &tmp, sizeof(tmp)) < 0) { |
1116 | L<<Logger::Error<<"Failed to set IPv6 socket to IPv6 only, continuing anyhow: "<<strerror(errno)<<endl; | |
1117 | } | |
1118 | ||
c8ddb7c2 | 1119 | #ifdef TCP_DEFER_ACCEPT |
37d3f960 BH |
1120 | if(setsockopt(fd, SOL_TCP,TCP_DEFER_ACCEPT,(char*)&tmp,sizeof tmp) >= 0) { |
1121 | if(i==locals.begin()) | |
4957a608 | 1122 | L<<Logger::Error<<"Enabled TCP data-ready filter for (slight) DoS protection"<<endl; |
c8ddb7c2 BH |
1123 | } |
1124 | #endif | |
1125 | ||
32252594 | 1126 | sin.sin4.sin_port = htons(st.port); |
37d3f960 BH |
1127 | int socklen=sin.sin4.sin_family==AF_INET ? sizeof(sin.sin4) : sizeof(sin.sin6); |
1128 | if (::bind(fd, (struct sockaddr *)&sin, socklen )<0) | |
3f81d239 | 1129 | throw PDNSException("Binding TCP server socket for "+ st.host +": "+stringerror()); |
f28307ad | 1130 | |
37d3f960 | 1131 | Utility::setNonBlocking(fd); |
49a699c4 | 1132 | setSocketSendBuffer(fd, 65000); |
37d3f960 | 1133 | listen(fd, 128); |
5db529f8 | 1134 | deferredAdd.push_back(make_pair(fd, handleNewTCPQuestion)); |
c2136bf0 | 1135 | g_tcpListenSockets.push_back(fd); |
84433b79 | 1136 | // we don't need to update g_listenSocketsAddresses since it doesn't work for TCP/IP: |
1137 | // - fd is not that which we know here, but returned from accept() | |
aa136564 | 1138 | if(sin.sin4.sin_family == AF_INET) |
32252594 | 1139 | L<<Logger::Error<<"Listening for TCP queries on "<< sin.toString() <<":"<<st.port<<endl; |
aa136564 | 1140 | else |
32252594 | 1141 | L<<Logger::Error<<"Listening for TCP queries on ["<< sin.toString() <<"]:"<<st.port<<endl; |
f28307ad | 1142 | } |
9c495589 BH |
1143 | } |
1144 | ||
f28307ad | 1145 | void makeUDPServerSockets() |
288f4aa9 | 1146 | { |
f28307ad | 1147 | vector<string>locals; |
2e3d8a19 | 1148 | stringtok(locals,::arg()["local-address"]," ,"); |
288f4aa9 | 1149 | |
f28307ad | 1150 | if(locals.empty()) |
3f81d239 | 1151 | throw PDNSException("No local address specified"); |
f28307ad | 1152 | |
f28307ad | 1153 | for(vector<string>::const_iterator i=locals.begin();i!=locals.end();++i) { |
32252594 BH |
1154 | ServiceTuple st; |
1155 | st.port=::arg().asNum("local-port"); | |
1156 | parseService(*i, st); | |
1157 | ||
37d3f960 | 1158 | ComboAddress sin; |
996c89cc | 1159 | |
37d3f960 BH |
1160 | memset(&sin, 0, sizeof(sin)); |
1161 | sin.sin4.sin_family = AF_INET; | |
32252594 | 1162 | if(!IpToU32(st.host.c_str() , (uint32_t*)&sin.sin4.sin_addr.s_addr)) { |
37d3f960 | 1163 | sin.sin6.sin6_family = AF_INET6; |
f71bc087 | 1164 | if(makeIPv6sockaddr(st.host, &sin.sin6) < 0) |
3f81d239 | 1165 | throw PDNSException("Unable to resolve local address for UDP server on '"+ st.host +"'"); |
37d3f960 BH |
1166 | } |
1167 | ||
bb4bdbaf | 1168 | int fd=socket(sin.sin4.sin_family, SOCK_DGRAM, 0); |
d3b4137e | 1169 | if(fd < 0) { |
3f81d239 | 1170 | throw PDNSException("Making a UDP server socket for resolver: "+netstringerror()); |
d3b4137e | 1171 | } |
b71b60ee | 1172 | setSocketTimestamps(fd); |
0dfa94ab | 1173 | |
b71b60ee | 1174 | if(IsAnyAddress(sin)) { |
0dfa94ab | 1175 | int one=1; |
b71b60ee | 1176 | setsockopt(fd, IPPROTO_IP, GEN_IP_PKTINFO, &one, sizeof(one)); // linux supports this, so why not - might fail on other systems |
1177 | setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one)); | |
0dfa94ab | 1178 | if(sin.sin6.sin6_family == AF_INET6 && setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one)) < 0) { |
1179 | L<<Logger::Error<<"Failed to set IPv6 socket to IPv6 only, continuing anyhow: "<<strerror(errno)<<endl; | |
1180 | } | |
1181 | ||
b71b60ee | 1182 | } |
37d3f960 | 1183 | |
a903b39c | 1184 | Utility::setCloseOnExec(fd); |
1185 | ||
4e9a20e6 | 1186 | setSocketReceiveBuffer(fd, 250000); |
32252594 | 1187 | sin.sin4.sin_port = htons(st.port); |
37d3f960 BH |
1188 | |
1189 | int socklen=sin.sin4.sin_family==AF_INET ? sizeof(sin.sin4) : sizeof(sin.sin6); | |
1190 | if (::bind(fd, (struct sockaddr *)&sin, socklen)<0) | |
3f81d239 | 1191 | throw PDNSException("Resolver binding to server socket on port "+ lexical_cast<string>(st.port) +" for "+ st.host+": "+stringerror()); |
f28307ad BH |
1192 | |
1193 | Utility::setNonBlocking(fd); | |
c2136bf0 | 1194 | |
0aaecd50 | 1195 | deferredAdd.push_back(make_pair(fd, handleNewUDPQuestion)); |
40a3dd64 | 1196 | g_listenSocketsAddresses[fd]=sin; // this is written to only from the startup thread, not from the workers |
aa136564 | 1197 | if(sin.sin4.sin_family == AF_INET) |
32252594 | 1198 | L<<Logger::Error<<"Listening for UDP queries on "<< sin.toString() <<":"<<st.port<<endl; |
aa136564 | 1199 | else |
32252594 | 1200 | L<<Logger::Error<<"Listening for UDP queries on ["<< sin.toString() <<"]:"<<st.port<<endl; |
f28307ad | 1201 | } |
c836dc19 | 1202 | } |
caa6eefa | 1203 | |
9c495589 | 1204 | |
c836dc19 BH |
1205 | void daemonize(void) |
1206 | { | |
1207 | if(fork()) | |
1208 | exit(0); // bye bye | |
1209 | ||
1210 | setsid(); | |
1211 | ||
27a5ead5 BH |
1212 | int i=open("/dev/null",O_RDWR); /* open stdin */ |
1213 | if(i < 0) | |
1214 | L<<Logger::Critical<<"Unable to open /dev/null: "<<stringerror()<<endl; | |
1215 | else { | |
1216 | dup2(i,0); /* stdin */ | |
1217 | dup2(i,1); /* stderr */ | |
1218 | dup2(i,2); /* stderr */ | |
1219 | close(i); | |
1220 | } | |
288f4aa9 | 1221 | } |
caa6eefa | 1222 | |
aaacf7f2 | 1223 | uint64_t counter; |
c75a6a9e BH |
1224 | bool statsWanted; |
1225 | ||
1226 | void usr1Handler(int) | |
1227 | { | |
1228 | statsWanted=true; | |
1229 | } | |
ae1b2e98 | 1230 | |
9170fbaf BH |
1231 | void usr2Handler(int) |
1232 | { | |
f1f34cc2 | 1233 | g_quiet= !g_quiet; |
1234 | SyncRes::setDefaultLogMode(g_quiet ? SyncRes::LogNone : SyncRes::Log); | |
1235 | ::arg().set("quiet")=g_quiet ? "" : "no"; | |
9170fbaf BH |
1236 | } |
1237 | ||
c75a6a9e BH |
1238 | void doStats(void) |
1239 | { | |
16beeaa4 BH |
1240 | static time_t lastOutputTime; |
1241 | static uint64_t lastQueryCount; | |
d299d4f5 | 1242 | |
1243 | uint64_t cacheHits = broadcastAccFunction<uint64_t>(pleaseGetCacheHits); | |
1244 | uint64_t cacheMisses = broadcastAccFunction<uint64_t>(pleaseGetCacheMisses); | |
16beeaa4 | 1245 | |
d299d4f5 | 1246 | if(g_stats.qcounter && (cacheHits + cacheMisses) && SyncRes::s_queries && SyncRes::s_outqueries) { |
3427fa8a BH |
1247 | L<<Logger::Warning<<"stats: "<<g_stats.qcounter<<" questions, "<< |
1248 | broadcastAccFunction<uint64_t>(pleaseGetCacheSize)<< " cache entries, "<< | |
1249 | broadcastAccFunction<uint64_t>(pleaseGetNegCacheSize)<<" negative entries, "<< | |
1250 | (int)((cacheHits*100.0)/(cacheHits+cacheMisses))<<"% cache hits"<<endl; | |
1251 | ||
1252 | L<<Logger::Warning<<"stats: throttle map: " | |
1253 | << broadcastAccFunction<uint64_t>(pleaseGetThrottleSize) <<", ns speeds: " | |
1254 | << broadcastAccFunction<uint64_t>(pleaseGetNsSpeedsSize)<<endl; | |
70c2c8b1 BH |
1255 | L<<Logger::Warning<<"stats: outpacket/query ratio "<<(int)(SyncRes::s_outqueries*100.0/SyncRes::s_queries)<<"%"; |
1256 | L<<Logger::Warning<<", "<<(int)(SyncRes::s_throttledqueries*100.0/(SyncRes::s_outqueries+SyncRes::s_throttledqueries))<<"% throttled, " | |
525b8a7c | 1257 | <<SyncRes::s_nodelegated<<" no-delegation drops"<<endl; |
3427fa8a BH |
1258 | L<<Logger::Warning<<"stats: "<<SyncRes::s_tcpoutqueries<<" outgoing tcp connections, "<< |
1259 | broadcastAccFunction<uint64_t>(pleaseGetConcurrentQueries)<<" queries running, "<<SyncRes::s_outgoingtimeouts<<" outgoing timeouts"<<endl; | |
81883dcc | 1260 | |
16beeaa4 BH |
1261 | //L<<Logger::Warning<<"stats: "<<g_stats.ednsPingMatches<<" ping matches, "<<g_stats.ednsPingMismatches<<" mismatches, "<< |
1262 | //g_stats.noPingOutQueries<<" outqueries w/o ping, "<< g_stats.noEdnsOutQueries<<" w/o EDNS"<<endl; | |
1263 | ||
1264 | L<<Logger::Warning<<"stats: " << broadcastAccFunction<uint64_t>(pleaseGetPacketCacheSize) << | |
1265 | " packet cache entries, "<<(int)(100.0*broadcastAccFunction<uint64_t>(pleaseGetPacketCacheHits)/SyncRes::s_queries) << "% packet cache hits"<<endl; | |
1266 | ||
1267 | time_t now = time(0); | |
1268 | if(lastOutputTime && lastQueryCount && now != lastOutputTime) { | |
1269 | L<<Logger::Warning<<"stats: "<< (SyncRes::s_queries - lastQueryCount) / (now - lastOutputTime) <<" qps (average over "<< (now - lastOutputTime) << " seconds)"<<endl; | |
1270 | } | |
1271 | lastOutputTime = now; | |
1272 | lastQueryCount = SyncRes::s_queries; | |
c75a6a9e | 1273 | } |
7becf07f | 1274 | else if(statsWanted) |
70c2c8b1 | 1275 | L<<Logger::Warning<<"stats: no stats yet!"<<endl; |
7becf07f | 1276 | |
c75a6a9e BH |
1277 | statsWanted=false; |
1278 | } | |
c836dc19 | 1279 | |
29f0b1ce | 1280 | static void houseKeeping(void *) |
779828c4 | 1281 | try |
c836dc19 | 1282 | { |
d67620e4 | 1283 | static __thread time_t last_stat, last_rootupdate, last_prune, last_secpoll; |
8baca3fa | 1284 | static __thread int cleanCounter=0; |
c9e9e5e0 | 1285 | struct timeval now; |
c038218b | 1286 | Utility::gettimeofday(&now, 0); |
c9e9e5e0 | 1287 | |
1a16adf0 | 1288 | // clog<<"* "<<t_id<<" "<<(void*)&last_stat<<"\t"<<(unsigned int)last_stat<<endl; |
ac0e821b | 1289 | |
c3828c03 | 1290 | if(now.tv_sec - last_prune > (time_t)(5 + t_id)) { |
5e4a2466 BH |
1291 | DTime dt; |
1292 | dt.setTimeval(now); | |
49a699c4 | 1293 | t_RC->doPrune(); // this function is local to a thread, so fine anyhow |
c3828c03 | 1294 | t_packetCache->doPruneTo(::arg().asNum("max-packetcache-entries") / g_numThreads); |
33988bfb | 1295 | |
1a16adf0 | 1296 | pruneCollection(t_sstorage->negcache, ::arg().asNum("max-cache-entries") / (g_numThreads * 10), 200); |
8baca3fa BH |
1297 | |
1298 | if(!((cleanCounter++)%40)) { // this is a full scan! | |
1299 | time_t limit=now.tv_sec-300; | |
ac0e821b | 1300 | for(SyncRes::nsspeeds_t::iterator i = t_sstorage->nsSpeeds.begin() ; i!= t_sstorage->nsSpeeds.end(); ) |
8baca3fa | 1301 | if(i->second.stale(limit)) |
ac0e821b | 1302 | t_sstorage->nsSpeeds.erase(i++); |
8baca3fa BH |
1303 | else |
1304 | ++i; | |
1305 | } | |
7393d6c0 | 1306 | // L<<Logger::Warning<<"Spent "<<dt.udiff()/1000<<" msec cleaning"<<endl; |
ae1b2e98 BH |
1307 | last_prune=time(0); |
1308 | } | |
ac0e821b | 1309 | |
c038218b | 1310 | if(now.tv_sec - last_rootupdate > 7200) { |
c9e9e5e0 | 1311 | SyncRes sr(now); |
2188dcc3 | 1312 | sr.setDoEDNS0(true); |
ea634573 | 1313 | vector<DNSResourceRecord> ret; |
c836dc19 BH |
1314 | |
1315 | sr.setNoCache(); | |
a9af3782 | 1316 | int res=sr.beginResolve(".", QType(QType::NS), 1, ret); |
c836dc19 | 1317 | if(!res) { |
854d44e3 | 1318 | L<<Logger::Notice<<"Refreshed . records"<<endl; |
c9e9e5e0 | 1319 | last_rootupdate=now.tv_sec; |
c836dc19 BH |
1320 | } |
1321 | else | |
1322 | L<<Logger::Error<<"Failed to update . records, RCODE="<<res<<endl; | |
1323 | } | |
d67620e4 | 1324 | |
1325 | if(!t_id) { | |
1326 | if(now.tv_sec - last_stat >= 1800) { | |
1327 | doStats(); | |
1328 | last_stat=time(0); | |
1329 | } | |
1330 | ||
c0a074d7 | 1331 | if(now.tv_sec - last_secpoll >= 3600) { |
18b73338 KM |
1332 | try { |
1333 | doSecPoll(&last_secpoll); | |
1334 | } | |
1335 | catch(...) {} | |
d67620e4 | 1336 | } |
1337 | } | |
c836dc19 | 1338 | } |
3f81d239 | 1339 | catch(PDNSException& ae) |
779828c4 | 1340 | { |
c0a074d7 | 1341 | L<<Logger::Error<<"Fatal error in housekeeping thread: "<<ae.reason<<endl; |
779828c4 BH |
1342 | throw; |
1343 | } | |
d6d5dea7 | 1344 | |
49a699c4 BH |
1345 | void makeThreadPipes() |
1346 | { | |
c3828c03 | 1347 | for(unsigned int n=0; n < g_numThreads; ++n) { |
49a699c4 BH |
1348 | struct ThreadPipeSet tps; |
1349 | int fd[2]; | |
1350 | if(pipe(fd) < 0) | |
1351 | unixDie("Creating pipe for inter-thread communications"); | |
1352 | ||
1353 | tps.readToThread = fd[0]; | |
1354 | tps.writeToThread = fd[1]; | |
1355 | ||
1356 | if(pipe(fd) < 0) | |
1357 | unixDie("Creating pipe for inter-thread communications"); | |
1358 | tps.readFromThread = fd[0]; | |
1359 | tps.writeFromThread = fd[1]; | |
1360 | ||
1361 | g_pipes.push_back(tps); | |
1362 | } | |
1363 | } | |
1364 | ||
00c9b8c1 BH |
1365 | struct ThreadMSG |
1366 | { | |
1367 | pipefunc_t func; | |
1368 | bool wantAnswer; | |
1369 | }; | |
1370 | ||
49a699c4 BH |
1371 | void broadcastFunction(const pipefunc_t& func, bool skipSelf) |
1372 | { | |
49a699c4 BH |
1373 | unsigned int n = 0; |
1374 | BOOST_FOREACH(ThreadPipeSet& tps, g_pipes) | |
1375 | { | |
1376 | if(n++ == t_id) { | |
1377 | if(!skipSelf) | |
1378 | func(); // don't write to ourselves! | |
1379 | continue; | |
1380 | } | |
00c9b8c1 BH |
1381 | |
1382 | ThreadMSG* tmsg = new ThreadMSG(); | |
1383 | tmsg->func = func; | |
1384 | tmsg->wantAnswer = true; | |
1385 | if(write(tps.writeToThread, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) | |
49a699c4 BH |
1386 | unixDie("write to thread pipe returned wrong size or error"); |
1387 | ||
1388 | string* resp; | |
1389 | if(read(tps.readFromThread, &resp, sizeof(resp)) != sizeof(resp)) | |
1390 | unixDie("read from thread pipe returned wrong size or error"); | |
1391 | ||
1392 | if(resp) { | |
1393 | // cerr <<"got response: " << *resp << endl; | |
1394 | delete resp; | |
1395 | } | |
1396 | } | |
1397 | } | |
06ea9015 | 1398 | |
1399 | uint32_t g_disthashseed; | |
1400 | void distributeAsyncFunction(const std::string& question, const pipefunc_t& func) | |
00c9b8c1 | 1401 | { |
06ea9015 | 1402 | unsigned int hash = hashQuestion(question.c_str(), question.length(), g_disthashseed); |
1403 | unsigned int target = 1 + (hash % (g_pipes.size()-1)); | |
1404 | ||
00c9b8c1 BH |
1405 | if(target == t_id) { |
1406 | func(); | |
1407 | return; | |
1408 | } | |
1409 | ThreadPipeSet& tps = g_pipes[target]; | |
1410 | ThreadMSG* tmsg = new ThreadMSG(); | |
1411 | tmsg->func = func; | |
1412 | tmsg->wantAnswer = false; | |
1413 | ||
1414 | if(write(tps.writeToThread, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) | |
06ea9015 | 1415 | unixDie("write to thread pipe returned wrong size or error"); |
00c9b8c1 | 1416 | } |
3427fa8a | 1417 | |
49a699c4 BH |
1418 | void handlePipeRequest(int fd, FDMultiplexer::funcparam_t& var) |
1419 | { | |
00c9b8c1 BH |
1420 | ThreadMSG* tmsg; |
1421 | ||
1422 | if(read(fd, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) { // fd == readToThread | |
49a699c4 BH |
1423 | unixDie("read from thread pipe returned wrong size or error"); |
1424 | } | |
3427fa8a | 1425 | |
2f22827a | 1426 | void *resp=0; |
1427 | try { | |
1428 | resp = tmsg->func(); | |
1429 | } | |
1430 | catch(std::exception& e) { | |
1431 | L<<Logger::Error<<"PIPE function we executed created exception: "<<e.what()<<endl; // but what if they wanted an answer.. we send 0 | |
1432 | } | |
1433 | catch(PDNSException& e) { | |
1434 | L<<Logger::Error<<"PIPE function we executed created PDNS exception: "<<e.reason<<endl; // but what if they wanted an answer.. we send 0 | |
1435 | } | |
00c9b8c1 BH |
1436 | if(tmsg->wantAnswer) |
1437 | if(write(g_pipes[t_id].writeFromThread, &resp, sizeof(resp)) != sizeof(resp)) | |
1438 | unixDie("write to thread pipe returned wrong size or error"); | |
3427fa8a | 1439 | |
00c9b8c1 | 1440 | delete tmsg; |
49a699c4 | 1441 | } |
09e6702a | 1442 | |
13034931 BH |
1443 | template<class T> void *voider(const boost::function<T*()>& func) |
1444 | { | |
1445 | return func(); | |
1446 | } | |
1447 | ||
b3b5459d BH |
1448 | vector<ComboAddress>& operator+=(vector<ComboAddress>&a, const vector<ComboAddress>& b) |
1449 | { | |
1450 | a.insert(a.end(), b.begin(), b.end()); | |
1451 | return a; | |
1452 | } | |
1453 | ||
92011b8f | 1454 | vector<pair<string, uint16_t> >& operator+=(vector<pair<string, uint16_t> >&a, const vector<pair<string, uint16_t> >& b) |
1455 | { | |
1456 | a.insert(a.end(), b.begin(), b.end()); | |
1457 | return a; | |
1458 | } | |
1459 | ||
1460 | ||
13034931 | 1461 | template<class T> T broadcastAccFunction(const boost::function<T*()>& func, bool skipSelf) |
3427fa8a BH |
1462 | { |
1463 | unsigned int n = 0; | |
1464 | T ret=T(); | |
1465 | BOOST_FOREACH(ThreadPipeSet& tps, g_pipes) | |
1466 | { | |
1467 | if(n++ == t_id) { | |
1468 | if(!skipSelf) { | |
1469 | T* resp = (T*)func(); // don't write to ourselves! | |
1470 | if(resp) { | |
1471 | //~ cerr <<"got direct: " << *resp << endl; | |
1472 | ret += *resp; | |
1473 | delete resp; | |
1474 | } | |
1475 | } | |
1476 | continue; | |
1477 | } | |
1478 | ||
00c9b8c1 BH |
1479 | ThreadMSG* tmsg = new ThreadMSG(); |
1480 | tmsg->func = boost::bind(voider<T>, func); | |
1481 | tmsg->wantAnswer = true; | |
1482 | ||
1483 | if(write(tps.writeToThread, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) | |
3427fa8a | 1484 | unixDie("write to thread pipe returned wrong size or error"); |
00c9b8c1 | 1485 | |
3427fa8a BH |
1486 | |
1487 | T* resp; | |
1488 | if(read(tps.readFromThread, &resp, sizeof(resp)) != sizeof(resp)) | |
1489 | unixDie("read from thread pipe returned wrong size or error"); | |
1490 | ||
1491 | if(resp) { | |
1492 | //~ cerr <<"got response: " << *resp << endl; | |
1493 | ret += *resp; | |
1494 | delete resp; | |
1495 | } | |
1496 | } | |
1497 | return ret; | |
1498 | } | |
1499 | ||
13034931 BH |
1500 | template string broadcastAccFunction(const boost::function<string*()>& fun, bool skipSelf); // explicit instantiation |
1501 | template uint64_t broadcastAccFunction(const boost::function<uint64_t*()>& fun, bool skipSelf); // explicit instantiation | |
b3b5459d | 1502 | template vector<ComboAddress> broadcastAccFunction(const boost::function<vector<ComboAddress> *()>& fun, bool skipSelf); // explicit instantiation |
92011b8f | 1503 | template vector<pair<string,uint16_t> > broadcastAccFunction(const boost::function<vector<pair<string, uint16_t> > *()>& fun, bool skipSelf); // explicit instantiation |
3427fa8a | 1504 | |
d8f6d49f | 1505 | void handleRCC(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a BH |
1506 | { |
1507 | string remote; | |
1508 | string msg=s_rcc.recv(&remote); | |
1509 | RecursorControlParser rcp; | |
1510 | RecursorControlParser::func_t* command; | |
77499b05 | 1511 | |
09e6702a | 1512 | string answer=rcp.getAnswer(msg, &command); |
ab5c053d BH |
1513 | try { |
1514 | s_rcc.send(answer, &remote); | |
1515 | command(); | |
1516 | } | |
fdbf35ac | 1517 | catch(std::exception& e) { |
ab5c053d BH |
1518 | L<<Logger::Error<<"Error dealing with control socket request: "<<e.what()<<endl; |
1519 | } | |
3f81d239 | 1520 | catch(PDNSException& ae) { |
ab5c053d BH |
1521 | L<<Logger::Error<<"Error dealing with control socket request: "<<ae.reason<<endl; |
1522 | } | |
09e6702a BH |
1523 | } |
1524 | ||
d8f6d49f | 1525 | void handleTCPClientReadable(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 1526 | { |
0b18b22e | 1527 | PacketID* pident=any_cast<PacketID>(&var); |
667f7e60 | 1528 | // cerr<<"handleTCPClientReadable called for fd "<<fd<<", pident->inNeeded: "<<pident->inNeeded<<", "<<pident->sock->getHandle()<<endl; |
09e6702a | 1529 | |
667f7e60 | 1530 | shared_array<char> buffer(new char[pident->inNeeded]); |
09e6702a | 1531 | |
705f31ae | 1532 | int ret=recv(fd, buffer.get(), pident->inNeeded,0); |
09e6702a | 1533 | if(ret > 0) { |
667f7e60 BH |
1534 | pident->inMSG.append(&buffer[0], &buffer[ret]); |
1535 | pident->inNeeded-=ret; | |
825fa717 | 1536 | if(!pident->inNeeded || pident->inIncompleteOkay) { |
667f7e60 BH |
1537 | // cerr<<"Got entire load of "<<pident->inMSG.size()<<" bytes"<<endl; |
1538 | PacketID pid=*pident; | |
1539 | string msg=pident->inMSG; | |
09e6702a | 1540 | |
bb4bdbaf | 1541 | t_fdm->removeReadFD(fd); |
09e6702a BH |
1542 | MT->sendEvent(pid, &msg); |
1543 | } | |
1544 | else { | |
667f7e60 | 1545 | // cerr<<"Still have "<<pident->inNeeded<<" left to go"<<endl; |
09e6702a BH |
1546 | } |
1547 | } | |
1548 | else { | |
667f7e60 | 1549 | PacketID tmp=*pident; |
bb4bdbaf | 1550 | t_fdm->removeReadFD(fd); // pident might now be invalid (it isn't, but still) |
09e6702a BH |
1551 | string empty; |
1552 | MT->sendEvent(tmp, &empty); // this conveys error status | |
1553 | } | |
1554 | } | |
1555 | ||
d8f6d49f | 1556 | void handleTCPClientWritable(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 1557 | { |
0b18b22e | 1558 | PacketID* pid=any_cast<PacketID>(&var); |
4ca15bca | 1559 | int ret=send(fd, pid->outMSG.c_str() + pid->outPos, pid->outMSG.size() - pid->outPos,0); |
09e6702a | 1560 | if(ret > 0) { |
667f7e60 BH |
1561 | pid->outPos+=ret; |
1562 | if(pid->outPos==pid->outMSG.size()) { | |
1563 | PacketID tmp=*pid; | |
bb4bdbaf | 1564 | t_fdm->removeWriteFD(fd); |
09e6702a BH |
1565 | MT->sendEvent(tmp, &tmp.outMSG); // send back what we sent to convey everything is ok |
1566 | } | |
1567 | } | |
1568 | else { // error or EOF | |
667f7e60 | 1569 | PacketID tmp(*pid); |
bb4bdbaf | 1570 | t_fdm->removeWriteFD(fd); |
09e6702a | 1571 | string sent; |
998a4334 | 1572 | MT->sendEvent(tmp, &sent); // we convey error status by sending empty string |
09e6702a BH |
1573 | } |
1574 | } | |
1575 | ||
34801ab1 BH |
1576 | // resend event to everybody chained onto it |
1577 | void doResends(MT_t::waiters_t::iterator& iter, PacketID resend, const string& content) | |
1578 | { | |
1579 | if(iter->key.chain.empty()) | |
1580 | return; | |
e27e91a8 | 1581 | // cerr<<"doResends called!\n"; |
34801ab1 BH |
1582 | for(PacketID::chain_t::iterator i=iter->key.chain.begin(); i != iter->key.chain.end() ; ++i) { |
1583 | resend.fd=-1; | |
1584 | resend.id=*i; | |
e27e91a8 | 1585 | // cerr<<"\tResending "<<content.size()<<" bytes for fd="<<resend.fd<<" and id="<<resend.id<<endl; |
4665c31e | 1586 | |
34801ab1 BH |
1587 | MT->sendEvent(resend, &content); |
1588 | g_stats.chainResends++; | |
34801ab1 BH |
1589 | } |
1590 | } | |
1591 | ||
d8f6d49f | 1592 | void handleUDPServerResponse(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 1593 | { |
600fc20b | 1594 | PacketID pid=any_cast<PacketID>(var); |
998a4334 | 1595 | int len; |
09e6702a | 1596 | char data[1500]; |
996c89cc | 1597 | ComboAddress fromaddr; |
09e6702a BH |
1598 | socklen_t addrlen=sizeof(fromaddr); |
1599 | ||
998a4334 | 1600 | len=recvfrom(fd, data, sizeof(data), 0, (sockaddr *)&fromaddr, &addrlen); |
c1da7976 | 1601 | |
998a4334 BH |
1602 | if(len < (int)sizeof(dnsheader)) { |
1603 | if(len < 0) | |
996c89cc | 1604 | ; // cerr<<"Error on fd "<<fd<<": "<<stringerror()<<"\n"; |
09e6702a BH |
1605 | else { |
1606 | g_stats.serverParseError++; | |
1607 | if(g_logCommonErrors) | |
85db02c5 | 1608 | L<<Logger::Error<<"Unable to parse packet from remote UDP server "<< fromaddr.toString() << |
e44d9fa7 | 1609 | ": packet smaller than DNS header"<<endl; |
998a4334 | 1610 | } |
34801ab1 | 1611 | |
49a699c4 | 1612 | t_udpclientsocks->returnSocket(fd); |
34801ab1 BH |
1613 | string empty; |
1614 | ||
1615 | MT_t::waiters_t::iterator iter=MT->d_waiters.find(pid); | |
1616 | if(iter != MT->d_waiters.end()) | |
1617 | doResends(iter, pid, empty); | |
1618 | ||
1619 | MT->sendEvent(pid, &empty); // this denotes error (does lookup again.. at least L1 will be hot) | |
998a4334 BH |
1620 | return; |
1621 | } | |
1622 | ||
1623 | dnsheader dh; | |
1624 | memcpy(&dh, data, sizeof(dh)); | |
1625 | ||
6da3b3ad PD |
1626 | PacketID pident; |
1627 | pident.remote=fromaddr; | |
1628 | pident.id=dh.id; | |
1629 | pident.fd=fd; | |
34801ab1 | 1630 | |
33a928af | 1631 | if(!dh.qr && g_logCommonErrors) { |
854d44e3 | 1632 | L<<Logger::Notice<<"Not taking data from question on outgoing socket from "<< fromaddr.toStringWithPort() <<endl; |
6da3b3ad PD |
1633 | } |
1634 | ||
1635 | if(!dh.qdcount || // UPC, Nominum, very old BIND on FormErr, NSD | |
1636 | !dh.qr) { // one weird server | |
1637 | pident.domain.clear(); | |
1638 | pident.type = 0; | |
1639 | } | |
1640 | else { | |
1641 | try { | |
1642 | pident.domain=questionExpand(data, len, pident.type); // don't copy this from above - we need to do the actual read | |
1643 | } | |
1644 | catch(std::exception& e) { | |
1645 | g_stats.serverParseError++; // won't be fed to lwres.cc, so we have to increment | |
1646 | L<<Logger::Warning<<"Error in packet from "<< fromaddr.toStringWithPort() << ": "<<e.what() << endl; | |
1647 | return; | |
34801ab1 | 1648 | } |
6da3b3ad PD |
1649 | } |
1650 | string packet; | |
1651 | packet.assign(data, len); | |
34801ab1 | 1652 | |
6da3b3ad PD |
1653 | MT_t::waiters_t::iterator iter=MT->d_waiters.find(pident); |
1654 | if(iter != MT->d_waiters.end()) { | |
1655 | doResends(iter, pident, packet); | |
1656 | } | |
c1da7976 | 1657 | |
6da3b3ad | 1658 | retryWithName: |
4957a608 | 1659 | |
6da3b3ad PD |
1660 | if(!MT->sendEvent(pident, &packet)) { |
1661 | // 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 | |
1662 | for(MT_t::waiters_t::iterator mthread=MT->d_waiters.begin(); mthread!=MT->d_waiters.end(); ++mthread) { | |
1663 | if(pident.fd==mthread->key.fd && mthread->key.remote==pident.remote && mthread->key.type == pident.type && | |
1664 | pdns_iequals(pident.domain, mthread->key.domain)) { | |
1665 | mthread->key.nearMisses++; | |
998a4334 | 1666 | } |
6da3b3ad PD |
1667 | |
1668 | // be a bit paranoid here since we're weakening our matching | |
1669 | if(pident.domain.empty() && !mthread->key.domain.empty() && !pident.type && mthread->key.type && | |
1670 | pident.id == mthread->key.id && mthread->key.remote == pident.remote) { | |
1671 | // cerr<<"Empty response, rest matches though, sending to a waiter"<<endl; | |
1672 | pident.domain = mthread->key.domain; | |
1673 | pident.type = mthread->key.type; | |
1674 | goto retryWithName; // note that this only passes on an error, lwres will still reject the packet | |
d4fb76e9 | 1675 | } |
09e6702a | 1676 | } |
6da3b3ad PD |
1677 | g_stats.unexpectedCount++; // if we made it here, it really is an unexpected answer |
1678 | if(g_logCommonErrors) { | |
1679 | L<<Logger::Warning<<"Discarding unexpected packet from "<<fromaddr.toStringWithPort()<<": "<<pident.domain<<", "<<pident.type<<", "<<MT->d_waiters.size()<<" waiters"<<endl; | |
d8f6d49f | 1680 | } |
09e6702a | 1681 | } |
6da3b3ad PD |
1682 | else if(fd >= 0) { |
1683 | t_udpclientsocks->returnSocket(fd); | |
1684 | } | |
09e6702a BH |
1685 | } |
1686 | ||
1f4abb20 BH |
1687 | FDMultiplexer* getMultiplexer() |
1688 | { | |
1689 | FDMultiplexer* ret; | |
1690 | for(FDMultiplexer::FDMultiplexermap_t::const_iterator i = FDMultiplexer::getMultiplexerMap().begin(); | |
1691 | i != FDMultiplexer::getMultiplexerMap().end(); ++i) { | |
1692 | try { | |
1693 | ret=i->second(); | |
1f4abb20 BH |
1694 | return ret; |
1695 | } | |
98d0ee4a | 1696 | catch(FDMultiplexerException &fe) { |
0a7f24cb | 1697 | L<<Logger::Error<<"Non-fatal error initializing possible multiplexer ("<<fe.what()<<"), falling back"<<endl; |
98d0ee4a BH |
1698 | } |
1699 | catch(...) { | |
1700 | L<<Logger::Error<<"Non-fatal error initializing possible multiplexer"<<endl; | |
1701 | } | |
1f4abb20 BH |
1702 | } |
1703 | L<<Logger::Error<<"No working multiplexer found!"<<endl; | |
1704 | exit(1); | |
1705 | } | |
1706 | ||
5605c067 | 1707 | |
0f39c1a3 | 1708 | string* doReloadLuaScript() |
4485aa35 | 1709 | { |
674cf0f6 | 1710 | string fname= ::arg()["lua-dns-script"]; |
4485aa35 | 1711 | try { |
674cf0f6 BH |
1712 | if(fname.empty()) { |
1713 | t_pdl->reset(); | |
1714 | L<<Logger::Error<<t_id<<" Unloaded current lua script"<<endl; | |
0f39c1a3 | 1715 | return new string("unloaded\n"); |
4485aa35 BH |
1716 | } |
1717 | else { | |
5704e107 | 1718 | *t_pdl = shared_ptr<RecursorLua>(new RecursorLua(fname)); |
4485aa35 BH |
1719 | } |
1720 | } | |
fdbf35ac | 1721 | catch(std::exception& e) { |
674cf0f6 | 1722 | L<<Logger::Error<<t_id<<" Retaining current script, error from '"<<fname<<"': "<< e.what() <<endl; |
0f39c1a3 | 1723 | return new string("retaining current script, error from '"+fname+"': "+e.what()+"\n"); |
4485aa35 | 1724 | } |
674cf0f6 BH |
1725 | |
1726 | L<<Logger::Warning<<t_id<<" (Re)loaded lua script from '"<<fname<<"'"<<endl; | |
0f39c1a3 | 1727 | return new string("(re)loaded '"+fname+"'\n"); |
4485aa35 BH |
1728 | } |
1729 | ||
49a699c4 BH |
1730 | string doQueueReloadLuaScript(vector<string>::const_iterator begin, vector<string>::const_iterator end) |
1731 | { | |
1732 | if(begin != end) | |
1733 | ::arg().set("lua-dns-script") = *begin; | |
1734 | ||
0f39c1a3 | 1735 | return broadcastAccFunction<string>(doReloadLuaScript); |
49a699c4 BH |
1736 | } |
1737 | ||
77499b05 BH |
1738 | string* pleaseUseNewTraceRegex(const std::string& newRegex) |
1739 | try | |
1740 | { | |
1741 | if(newRegex.empty()) { | |
1742 | t_traceRegex->reset(); | |
1743 | return new string("unset\n"); | |
1744 | } | |
1745 | else { | |
1746 | (*t_traceRegex) = shared_ptr<Regex>(new Regex(newRegex)); | |
1747 | return new string("ok\n"); | |
1748 | } | |
1749 | } | |
3f81d239 | 1750 | catch(PDNSException& ae) |
77499b05 BH |
1751 | { |
1752 | return new string(ae.reason+"\n"); | |
1753 | } | |
1754 | ||
1755 | string doTraceRegex(vector<string>::const_iterator begin, vector<string>::const_iterator end) | |
1756 | { | |
1757 | return broadcastAccFunction<string>(boost::bind(pleaseUseNewTraceRegex, begin!=end ? *begin : "")); | |
1758 | } | |
1759 | ||
4e9a20e6 | 1760 | static void checkLinuxIPv6Limits() |
1761 | { | |
1762 | #ifdef __linux__ | |
1763 | string line; | |
1764 | if(readFileIfThere("/proc/sys/net/ipv6/route/max_size", &line)) { | |
1765 | int lim=atoi(line.c_str()); | |
1766 | if(lim < 16384) { | |
36849ff2 | 1767 | L<<Logger::Error<<"If using IPv6, please raise sysctl net.ipv6.route.max_size, currently set to "<<lim<<" which is < 16384"<<endl; |
4e9a20e6 | 1768 | } |
1769 | } | |
1770 | #endif | |
1771 | } | |
36849ff2 | 1772 | static void checkOrFixFDS() |
4e9a20e6 | 1773 | { |
36849ff2 | 1774 | unsigned int availFDs=getFilenumLimit(); |
1775 | if(g_maxMThreads * g_numThreads > availFDs) { | |
1776 | if(getFilenumLimit(true) >= g_maxMThreads * g_numThreads) { | |
1777 | setFilenumLimit(g_maxMThreads * g_numThreads); | |
1778 | L<<Logger::Warning<<"Raised soft limit on number of filedescriptors to "<<g_maxMThreads * g_numThreads<<" to match max-mthreads and threads settings"<<endl; | |
1779 | } | |
1780 | else { | |
1781 | int newval = getFilenumLimit(true) / g_numThreads; | |
1782 | L<<Logger::Warning<<"Insufficient number of filedescriptors available for max-mthreads*threads setting! ("<<availFDs<<" < "<<g_maxMThreads*g_numThreads<<"), reducing max-mthreads to "<<newval<<endl; | |
1783 | g_maxMThreads = newval; | |
1784 | setFilenumLimit(g_maxMThreads * g_numThreads); | |
1785 | } | |
1786 | } | |
1787 | ||
4e9a20e6 | 1788 | } |
77499b05 | 1789 | |
bb4bdbaf | 1790 | void* recursorThread(void*); |
51e2144e | 1791 | |
3427fa8a | 1792 | void* pleaseSupplantACLs(NetmaskGroup *ng) |
49a699c4 BH |
1793 | { |
1794 | t_allowFrom = ng; | |
3427fa8a | 1795 | return 0; |
49a699c4 BH |
1796 | } |
1797 | ||
dbd23fc2 BH |
1798 | int g_argc; |
1799 | char** g_argv; | |
1800 | ||
18af64a8 | 1801 | void parseACLs() |
f7c1d4e3 | 1802 | { |
18af64a8 | 1803 | static bool l_initialized; |
49a699c4 BH |
1804 | |
1805 | if(l_initialized) { // only reload configuration file on second call | |
18af64a8 BH |
1806 | string configname=::arg()["config-dir"]+"/recursor.conf"; |
1807 | cleanSlashes(configname); | |
1808 | ||
1809 | if(!::arg().preParseFile(configname.c_str(), "allow-from-file")) | |
7e818521 | 1810 | throw runtime_error("Unable to re-parse configuration file '"+configname+"'"); |
49a699c4 | 1811 | ::arg().preParseFile(configname.c_str(), "allow-from", LOCAL_NETS); |
242b90e1 | 1812 | ::arg().preParseFile(configname.c_str(), "include-dir"); |
829849d6 AT |
1813 | ::arg().preParse(g_argc, g_argv, "include-dir"); |
1814 | ||
1815 | // then process includes | |
1816 | std::vector<std::string> extraConfigs; | |
242b90e1 AT |
1817 | ::arg().gatherIncludes(extraConfigs); |
1818 | ||
829849d6 | 1819 | BOOST_FOREACH(const std::string& fn, extraConfigs) { |
7e818521 | 1820 | if(!::arg().preParseFile(fn.c_str(), "allow-from-file", ::arg()["allow-from-file"])) |
1821 | throw runtime_error("Unable to re-parse configuration file include '"+fn+"'"); | |
1822 | if(!::arg().preParseFile(fn.c_str(), "allow-from", ::arg()["allow-from"])) | |
1823 | throw runtime_error("Unable to re-parse configuration file include '"+fn+"'"); | |
829849d6 | 1824 | } |
ca2c884c AT |
1825 | |
1826 | ::arg().preParse(g_argc, g_argv, "allow-from-file"); | |
1827 | ::arg().preParse(g_argc, g_argv, "allow-from"); | |
f27e6356 | 1828 | } |
49a699c4 BH |
1829 | |
1830 | NetmaskGroup* oldAllowFrom = t_allowFrom, *allowFrom=new NetmaskGroup; | |
1831 | ||
2c95fc65 BH |
1832 | if(!::arg()["allow-from-file"].empty()) { |
1833 | string line; | |
2c95fc65 BH |
1834 | ifstream ifs(::arg()["allow-from-file"].c_str()); |
1835 | if(!ifs) { | |
49a699c4 | 1836 | delete allowFrom; |
9c61b9d0 | 1837 | throw runtime_error("Could not open '"+::arg()["allow-from-file"]+"': "+stringerror()); |
2c95fc65 BH |
1838 | } |
1839 | ||
1840 | string::size_type pos; | |
1841 | while(getline(ifs,line)) { | |
1842 | pos=line.find('#'); | |
1843 | if(pos!=string::npos) | |
1844 | line.resize(pos); | |
1845 | trim(line); | |
1846 | if(line.empty()) | |
1847 | continue; | |
1848 | ||
18af64a8 | 1849 | allowFrom->addMask(line); |
2c95fc65 | 1850 | } |
49a699c4 | 1851 | L<<Logger::Warning<<"Done parsing " << allowFrom->size() <<" allow-from ranges from file '"<<::arg()["allow-from-file"]<<"' - overriding 'allow-from' setting"<<endl; |
2c95fc65 BH |
1852 | } |
1853 | else if(!::arg()["allow-from"].empty()) { | |
f7c1d4e3 BH |
1854 | vector<string> ips; |
1855 | stringtok(ips, ::arg()["allow-from"], ", "); | |
c36bc97a | 1856 | |
f7c1d4e3 BH |
1857 | L<<Logger::Warning<<"Only allowing queries from: "; |
1858 | for(vector<string>::const_iterator i = ips.begin(); i!= ips.end(); ++i) { | |
18af64a8 | 1859 | allowFrom->addMask(*i); |
f7c1d4e3 | 1860 | if(i!=ips.begin()) |
674cf0f6 | 1861 | L<<Logger::Warning<<", "; |
f7c1d4e3 BH |
1862 | L<<Logger::Warning<<*i; |
1863 | } | |
1864 | L<<Logger::Warning<<endl; | |
1865 | } | |
49a699c4 BH |
1866 | else { |
1867 | if(::arg()["local-address"]!="127.0.0.1" && ::arg().asNum("local-port")==53) | |
1868 | L<<Logger::Error<<"WARNING: Allowing queries from all IP addresses - this can be a security risk!"<<endl; | |
1869 | delete allowFrom; | |
1870 | allowFrom = 0; | |
1871 | } | |
1872 | ||
1873 | g_initialAllowFrom = allowFrom; | |
d7dae798 | 1874 | broadcastFunction(boost::bind(pleaseSupplantACLs, allowFrom)); |
49a699c4 BH |
1875 | delete oldAllowFrom; |
1876 | ||
1877 | l_initialized = true; | |
18af64a8 BH |
1878 | } |
1879 | ||
1880 | int serviceMain(int argc, char*argv[]) | |
1881 | { | |
5124de27 | 1882 | L.setName(s_programname); |
18af64a8 BH |
1883 | |
1884 | L.setLoglevel((Logger::Urgency)(6)); // info and up | |
1885 | ||
1886 | if(!::arg()["logging-facility"].empty()) { | |
f8499e52 BH |
1887 | int val=logFacilityToLOG(::arg().asNum("logging-facility") ); |
1888 | if(val >= 0) | |
1889 | theL().setFacility(val); | |
18af64a8 BH |
1890 | else |
1891 | L<<Logger::Error<<"Unknown logging facility "<<::arg().asNum("logging-facility") <<endl; | |
1892 | } | |
1893 | ||
ba1a571d | 1894 | showProductVersion(); |
18af64a8 | 1895 | seedRandom(::arg()["entropy-source"]); |
06ea9015 | 1896 | g_disthashseed=dns_random(0xffffffff); |
1897 | ||
18af64a8 | 1898 | parseACLs(); |
92011b8f | 1899 | sortPublicSuffixList(); |
1900 | ||
eb5bae86 BH |
1901 | if(!::arg()["dont-query"].empty()) { |
1902 | g_dontQuery=new NetmaskGroup; | |
1903 | vector<string> ips; | |
1904 | stringtok(ips, ::arg()["dont-query"], ", "); | |
66e0b6ea BH |
1905 | ips.push_back("0.0.0.0"); |
1906 | ips.push_back("::"); | |
c36bc97a | 1907 | |
eb5bae86 BH |
1908 | L<<Logger::Warning<<"Will not send queries to: "; |
1909 | for(vector<string>::const_iterator i = ips.begin(); i!= ips.end(); ++i) { | |
1910 | g_dontQuery->addMask(*i); | |
1911 | if(i!=ips.begin()) | |
4957a608 | 1912 | L<<Logger::Warning<<", "; |
eb5bae86 BH |
1913 | L<<Logger::Warning<<*i; |
1914 | } | |
1915 | L<<Logger::Warning<<endl; | |
1916 | } | |
1917 | ||
f7c1d4e3 | 1918 | g_quiet=::arg().mustDo("quiet"); |
4ea94941 | 1919 | |
1bc3c142 BH |
1920 | g_weDistributeQueries = ::arg().mustDo("pdns-distributes-queries"); |
1921 | if(g_weDistributeQueries) { | |
1922 | L<<Logger::Warning<<"PowerDNS Recursor itself will distribute queries over threads"<<endl; | |
1923 | } | |
1924 | ||
77499b05 BH |
1925 | if(::arg()["trace"]=="fail") { |
1926 | SyncRes::setDefaultLogMode(SyncRes::Store); | |
1927 | } | |
1928 | else if(::arg().mustDo("trace")) { | |
1929 | SyncRes::setDefaultLogMode(SyncRes::Log); | |
f7c1d4e3 BH |
1930 | ::arg().set("quiet")="no"; |
1931 | g_quiet=false; | |
1932 | } | |
f7c1d4e3 | 1933 | |
aadceba8 | 1934 | SyncRes::s_minimumTTL = ::arg().asNum("minimum-ttl-override"); |
1935 | ||
4e9a20e6 | 1936 | checkLinuxIPv6Limits(); |
5a38281c BH |
1937 | try { |
1938 | vector<string> addrs; | |
1939 | if(!::arg()["query-local-address6"].empty()) { | |
1940 | SyncRes::s_doIPv6=true; | |
d4fb76e9 | 1941 | L<<Logger::Warning<<"Enabling IPv6 transport for outgoing queries"<<endl; |
5a38281c BH |
1942 | |
1943 | stringtok(addrs, ::arg()["query-local-address6"], ", ;"); | |
1944 | BOOST_FOREACH(const string& addr, addrs) { | |
4957a608 | 1945 | g_localQueryAddresses6.push_back(ComboAddress(addr)); |
5a38281c BH |
1946 | } |
1947 | } | |
d4fb76e9 BH |
1948 | else { |
1949 | L<<Logger::Warning<<"NOT using IPv6 for outgoing queries - set 'query-local-address6=::' to enable"<<endl; | |
1950 | } | |
5a38281c BH |
1951 | addrs.clear(); |
1952 | stringtok(addrs, ::arg()["query-local-address"], ", ;"); | |
1953 | BOOST_FOREACH(const string& addr, addrs) { | |
1954 | g_localQueryAddresses4.push_back(ComboAddress(addr)); | |
1955 | } | |
1956 | } | |
1957 | catch(std::exception& e) { | |
1958 | L<<Logger::Error<<"Assigning local query addresses: "<<e.what(); | |
1959 | exit(99); | |
f7c1d4e3 | 1960 | } |
f555e92e | 1961 | |
578361b3 | 1962 | SyncRes::s_noEDNSPing = true; // ::arg().mustDo("disable-edns-ping"); |
4bfae16d | 1963 | SyncRes::s_noEDNS = ::arg().mustDo("disable-edns"); |
578361b3 | 1964 | if(!SyncRes::s_noEDNS) { |
1965 | L<<Logger::Warning<<"Running in experimental EDNS mode - may cause problems"<<endl; | |
1966 | } | |
bb4bdbaf | 1967 | |
1051f8a9 BH |
1968 | SyncRes::s_nopacketcache = ::arg().mustDo("disable-packetcache"); |
1969 | ||
f7c1d4e3 | 1970 | SyncRes::s_maxnegttl=::arg().asNum("max-negative-ttl"); |
c3e753c7 | 1971 | SyncRes::s_maxcachettl=::arg().asNum("max-cache-ttl"); |
1051f8a9 BH |
1972 | SyncRes::s_packetcachettl=::arg().asNum("packetcache-ttl"); |
1973 | SyncRes::s_packetcacheservfailttl=::arg().asNum("packetcache-servfail-ttl"); | |
628e2c7b PA |
1974 | SyncRes::s_serverdownmaxfails=::arg().asNum("server-down-max-fails"); |
1975 | SyncRes::s_serverdownthrottletime=::arg().asNum("server-down-throttle-time"); | |
f7c1d4e3 | 1976 | SyncRes::s_serverID=::arg()["server-id"]; |
173d790e | 1977 | SyncRes::s_maxqperq=::arg().asNum("max-qperq"); |
f7c1d4e3 BH |
1978 | if(SyncRes::s_serverID.empty()) { |
1979 | char tmp[128]; | |
1980 | gethostname(tmp, sizeof(tmp)-1); | |
1981 | SyncRes::s_serverID=tmp; | |
1982 | } | |
1983 | ||
5b0ddd18 | 1984 | g_networkTimeoutMsec = ::arg().asNum("network-timeout"); |
bb4bdbaf | 1985 | |
49a699c4 | 1986 | g_initialDomainMap = parseAuthAndForwards(); |
674cf0f6 | 1987 | |
08f3f638 | 1988 | g_latencyStatSize=::arg().asNum("latency-statistic-size"); |
b3b5459d | 1989 | |
f7c1d4e3 | 1990 | g_logCommonErrors=::arg().mustDo("log-common-errors"); |
e661a20b PD |
1991 | |
1992 | g_anyToTcp = ::arg().mustDo("any-to-tcp"); | |
a09a8ce0 PD |
1993 | g_udpTruncationThreshold = ::arg().asNum("udp-truncation-threshold"); |
1994 | ||
f7c1d4e3 BH |
1995 | makeUDPServerSockets(); |
1996 | makeTCPServerSockets(); | |
815099b2 | 1997 | |
677e2a46 BH |
1998 | int forks; |
1999 | for(forks = 0; forks < ::arg().asNum("processes") - 1; ++forks) { | |
1bc3c142 BH |
2000 | if(!fork()) // we are child |
2001 | break; | |
2002 | } | |
2003 | ||
2d733c0f | 2004 | s_pidfname=::arg()["socket-dir"]+"/"+s_programname+".pid"; |
815099b2 BH |
2005 | if(!s_pidfname.empty()) |
2006 | unlink(s_pidfname.c_str()); // remove possible old pid file | |
f7c1d4e3 | 2007 | |
f7c1d4e3 BH |
2008 | if(::arg().mustDo("daemon")) { |
2009 | L<<Logger::Warning<<"Calling daemonize, going to background"<<endl; | |
2010 | L.toConsole(Logger::Critical); | |
f7c1d4e3 BH |
2011 | daemonize(); |
2012 | } | |
2013 | signal(SIGUSR1,usr1Handler); | |
2014 | signal(SIGUSR2,usr2Handler); | |
2015 | signal(SIGPIPE,SIG_IGN); | |
2016 | writePid(); | |
677e2a46 | 2017 | makeControlChannelSocket( ::arg().asNum("processes") > 1 ? forks : -1); |
138435cb BH |
2018 | |
2019 | int newgid=0; | |
2020 | if(!::arg()["setgid"].empty()) | |
2021 | newgid=Utility::makeGidNumeric(::arg()["setgid"]); | |
2022 | int newuid=0; | |
2023 | if(!::arg()["setuid"].empty()) | |
2024 | newuid=Utility::makeUidNumeric(::arg()["setuid"]); | |
2025 | ||
f1d6a7ce KM |
2026 | Utility::dropGroupPrivs(newuid, newgid); |
2027 | ||
138435cb BH |
2028 | if (!::arg()["chroot"].empty()) { |
2029 | if (chroot(::arg()["chroot"].c_str())<0 || chdir("/") < 0) { | |
2030 | L<<Logger::Error<<"Unable to chroot to '"+::arg()["chroot"]+"': "<<strerror (errno)<<", exiting"<<endl; | |
2031 | exit(1); | |
2032 | } | |
2033 | } | |
2034 | ||
f1d6a7ce | 2035 | Utility::dropUserPrivs(newuid); |
77c535ae | 2036 | g_numThreads = ::arg().asNum("threads") + ::arg().mustDo("pdns-distributes-queries"); |
343257a4 | 2037 | |
49a699c4 | 2038 | makeThreadPipes(); |
5d4dd7fe BH |
2039 | |
2040 | g_tcpTimeout=::arg().asNum("client-tcp-timeout"); | |
2041 | g_maxTCPPerClient=::arg().asNum("max-tcp-per-client"); | |
3a8a4d68 | 2042 | g_maxMThreads=::arg().asNum("max-mthreads"); |
36849ff2 | 2043 | checkOrFixFDS(); |
343257a4 | 2044 | |
c3828c03 | 2045 | if(g_numThreads == 1) { |
76698c6e | 2046 | L<<Logger::Warning<<"Operating unthreaded"<<endl; |
76698c6e BH |
2047 | recursorThread(0); |
2048 | } | |
2049 | else { | |
2050 | pthread_t tid; | |
c3828c03 BH |
2051 | L<<Logger::Warning<<"Launching "<< g_numThreads <<" threads"<<endl; |
2052 | for(unsigned int n=0; n < g_numThreads; ++n) { | |
77499b05 | 2053 | pthread_create(&tid, 0, recursorThread, (void*)(long)n); |
76698c6e BH |
2054 | } |
2055 | void* res; | |
49a699c4 BH |
2056 | |
2057 | ||
76698c6e | 2058 | pthread_join(tid, &res); |
bb4bdbaf | 2059 | } |
bb4bdbaf BH |
2060 | return 0; |
2061 | } | |
2062 | ||
2063 | void* recursorThread(void* ptr) | |
2064 | try | |
2065 | { | |
2e2cd8ec | 2066 | t_id=(int) (long) ptr; |
49a699c4 | 2067 | SyncRes tmp(g_now); // make sure it allocates tsstorage before we do anything, like primeHints or so.. |
ac0e821b | 2068 | t_sstorage->domainmap = g_initialDomainMap; |
49a699c4 BH |
2069 | t_allowFrom = g_initialAllowFrom; |
2070 | t_udpclientsocks = new UDPClientSocks(); | |
bd0289fc | 2071 | t_tcpClientCounts = new tcpClientCounts_t(); |
49a699c4 | 2072 | primeHints(); |
674cf0f6 | 2073 | |
49a699c4 BH |
2074 | t_packetCache = new RecursorPacketCache(); |
2075 | ||
2076 | L<<Logger::Warning<<"Done priming cache with root hints"<<endl; | |
2077 | ||
5704e107 | 2078 | t_pdl = new shared_ptr<RecursorLua>(); |
49a699c4 | 2079 | |
674cf0f6 BH |
2080 | try { |
2081 | if(!::arg()["lua-dns-script"].empty()) { | |
5704e107 | 2082 | *t_pdl = shared_ptr<RecursorLua>(new RecursorLua(::arg()["lua-dns-script"])); |
674cf0f6 BH |
2083 | L<<Logger::Warning<<"Loaded 'lua' script from '"<<::arg()["lua-dns-script"]<<"'"<<endl; |
2084 | } | |
674cf0f6 BH |
2085 | } |
2086 | catch(std::exception &e) { | |
2087 | L<<Logger::Error<<"Failed to load 'lua' script from '"<<::arg()["lua-dns-script"]<<"': "<<e.what()<<endl; | |
62f0ae62 | 2088 | _exit(99); |
674cf0f6 BH |
2089 | } |
2090 | ||
77499b05 | 2091 | t_traceRegex = new shared_ptr<Regex>(); |
92011b8f | 2092 | unsigned int ringsize=::arg().asNum("stats-ringbuffer-entries") / g_numThreads; |
2093 | if(ringsize) { | |
60c8afa8 | 2094 | t_remotes = new addrringbuf_t(); |
92011b8f | 2095 | t_remotes->set_capacity(ringsize); |
60c8afa8 | 2096 | t_servfailremotes = new addrringbuf_t(); |
92011b8f | 2097 | t_servfailremotes->set_capacity(ringsize); |
60c8afa8 | 2098 | t_largeanswerremotes = new addrringbuf_t(); |
92011b8f | 2099 | t_largeanswerremotes->set_capacity(ringsize); |
2100 | ||
2101 | ||
2102 | t_queryring = new boost::circular_buffer<pair<string, uint16_t> >(); | |
2103 | t_queryring->set_capacity(ringsize); | |
2104 | t_servfailqueryring = new boost::circular_buffer<pair<string, uint16_t> >(); | |
2105 | t_servfailqueryring->set_capacity(ringsize); | |
2106 | } | |
b3b5459d | 2107 | |
bb4bdbaf BH |
2108 | MT=new MTasker<PacketID,string>(::arg().asNum("stack-size")); |
2109 | ||
bb4bdbaf BH |
2110 | PacketID pident; |
2111 | ||
2112 | t_fdm=getMultiplexer(); | |
f3d1d67b | 2113 | if(!t_id) { |
30a1aa92 | 2114 | if(::arg().mustDo("experimental-webserver")) { |
2115 | L<<Logger::Warning << "Enabling web server" << endl; | |
8989097d | 2116 | try { |
1ce57618 | 2117 | new RecursorWebServer(t_fdm); |
8989097d CH |
2118 | } |
2119 | catch(PDNSException &e) { | |
2120 | L<<Logger::Error<<"Exception: "<<e.reason<<endl; | |
2121 | exit(99); | |
2122 | } | |
f3d1d67b | 2123 | } |
83252304 | 2124 | L<<Logger::Error<<"Enabled '"<< t_fdm->getName() << "' multiplexer"<<endl; |
f3d1d67b | 2125 | } |
83252304 | 2126 | |
49a699c4 | 2127 | t_fdm->addReadFD(g_pipes[t_id].readToThread, handlePipeRequest); |
83252304 | 2128 | |
1bc3c142 BH |
2129 | if(!g_weDistributeQueries || !t_id) // if we distribute queries, only t_id = 0 listens |
2130 | for(deferredAdd_t::const_iterator i=deferredAdd.begin(); i!=deferredAdd.end(); ++i) | |
2131 | t_fdm->addReadFD(i->first, i->second); | |
f7c1d4e3 | 2132 | |
674cf0f6 | 2133 | if(!t_id) { |
674cf0f6 BH |
2134 | t_fdm->addReadFD(s_rcc.d_fd, handleRCC); // control channel |
2135 | } | |
1bc3c142 | 2136 | |
f7c1d4e3 | 2137 | unsigned int maxTcpClients=::arg().asNum("max-tcp-clients"); |
f7c1d4e3 | 2138 | |
f7c1d4e3 | 2139 | bool listenOnTCP(true); |
49a699c4 | 2140 | |
2c78bd57 | 2141 | time_t last_carbon=0; |
2142 | time_t carbonInterval=::arg().asNum("carbon-interval"); | |
3427fa8a | 2143 | counter=0; // used to periodically execute certain tasks |
f7c1d4e3 | 2144 | for(;;) { |
ac0e821b | 2145 | while(MT->schedule(&g_now)); // MTasker letting the mthreads do their thing |
f7c1d4e3 | 2146 | |
3427fa8a BH |
2147 | if(!(counter%500)) { |
2148 | MT->makeThread(houseKeeping, 0); | |
f7c1d4e3 BH |
2149 | } |
2150 | ||
d2392145 | 2151 | if(!(counter%55)) { |
d8f6d49f | 2152 | typedef vector<pair<int, FDMultiplexer::funcparam_t> > expired_t; |
bb4bdbaf | 2153 | expired_t expired=t_fdm->getTimeouts(g_now); |
4957a608 | 2154 | |
f7c1d4e3 | 2155 | for(expired_t::iterator i=expired.begin() ; i != expired.end(); ++i) { |
cd989c87 | 2156 | shared_ptr<TCPConnection> conn=any_cast<shared_ptr<TCPConnection> >(i->second); |
4957a608 | 2157 | if(g_logCommonErrors) |
cd989c87 | 2158 | L<<Logger::Warning<<"Timeout from remote TCP client "<< conn->d_remote.toString() <<endl; |
4957a608 | 2159 | t_fdm->removeReadFD(i->first); |
f7c1d4e3 BH |
2160 | } |
2161 | } | |
2162 | ||
2163 | counter++; | |
2164 | ||
3427fa8a | 2165 | if(!t_id && statsWanted) { |
f7c1d4e3 BH |
2166 | doStats(); |
2167 | } | |
2168 | ||
2169 | Utility::gettimeofday(&g_now, 0); | |
2c78bd57 | 2170 | |
2171 | if(!t_id && (g_now.tv_sec - last_carbon >= carbonInterval)) { | |
2172 | MT->makeThread(doCarbonDump, 0); | |
2173 | last_carbon = g_now.tv_sec; | |
2174 | } | |
2175 | ||
bb4bdbaf | 2176 | t_fdm->run(&g_now); |
3ea54bf0 | 2177 | // 'run' updates g_now for us |
f7c1d4e3 | 2178 | |
b8ef5c5c | 2179 | if(!g_weDistributeQueries || !t_id) { // if pdns distributes queries, only tid 0 should do this |
5c889cf5 | 2180 | if(listenOnTCP) { |
2181 | if(TCPConnection::getCurrentConnections() > maxTcpClients) { // shutdown, too many connections | |
2182 | for(tcpListenSockets_t::iterator i=g_tcpListenSockets.begin(); i != g_tcpListenSockets.end(); ++i) | |
2183 | t_fdm->removeReadFD(*i); | |
2184 | listenOnTCP=false; | |
2185 | } | |
f7c1d4e3 | 2186 | } |
5c889cf5 | 2187 | else { |
2188 | if(TCPConnection::getCurrentConnections() <= maxTcpClients) { // reenable | |
2189 | for(tcpListenSockets_t::iterator i=g_tcpListenSockets.begin(); i != g_tcpListenSockets.end(); ++i) | |
2190 | t_fdm->addReadFD(*i, handleNewTCPQuestion); | |
2191 | listenOnTCP=true; | |
2192 | } | |
f7c1d4e3 BH |
2193 | } |
2194 | } | |
2195 | } | |
2196 | } | |
3f81d239 | 2197 | catch(PDNSException &ae) { |
bb4bdbaf BH |
2198 | L<<Logger::Error<<"Exception: "<<ae.reason<<endl; |
2199 | return 0; | |
2200 | } | |
2201 | catch(std::exception &e) { | |
2202 | L<<Logger::Error<<"STL Exception: "<<e.what()<<endl; | |
2203 | return 0; | |
2204 | } | |
2205 | catch(...) { | |
2206 | L<<Logger::Error<<"any other exception in main: "<<endl; | |
2207 | return 0; | |
2208 | } | |
2209 | ||
51e2144e | 2210 | |
288f4aa9 BH |
2211 | int main(int argc, char **argv) |
2212 | { | |
dbd23fc2 BH |
2213 | g_argc = argc; |
2214 | g_argv = argv; | |
5e3de507 | 2215 | g_stats.startupTime=time(0); |
3e135495 | 2216 | versionSetProduct(ProductRecursor); |
8a63d3ce | 2217 | reportBasicTypes(); |
0007c2e5 | 2218 | reportOtherTypes(); |
ea634573 | 2219 | |
22030c37 | 2220 | int ret = EXIT_SUCCESS; |
caa6eefa | 2221 | |
288f4aa9 | 2222 | try { |
f888311c | 2223 | ::arg().set("stack-size","stack size per mthread")="200000"; |
2e3d8a19 | 2224 | ::arg().set("soa-minimum-ttl","Don't change")="0"; |
2e3d8a19 | 2225 | ::arg().set("no-shuffle","Don't change")="off"; |
2e3d8a19 | 2226 | ::arg().set("local-port","port to listen on")="53"; |
32252594 | 2227 | ::arg().set("local-address","IP addresses to listen on, separated by spaces or commas. Also accepts ports.")="127.0.0.1"; |
77499b05 | 2228 | ::arg().set("trace","if we should output heaps of logging. set to 'fail' to only log failing domains")="off"; |
2e3d8a19 | 2229 | ::arg().set("daemon","Operate as a daemon")="yes"; |
34162f8f | 2230 | ::arg().set("loglevel","Amount of logging. Higher is more. Do not set below 3")="4"; |
0e9d9ce2 | 2231 | ::arg().set("log-common-errors","If we should log rather common errors")="yes"; |
2e3d8a19 BH |
2232 | ::arg().set("chroot","switch to chroot jail")=""; |
2233 | ::arg().set("setgid","If set, change group id to this gid for more security")=""; | |
2234 | ::arg().set("setuid","If set, change user id to this uid for more security")=""; | |
5b0ddd18 | 2235 | ::arg().set("network-timeout", "Wait this nummer of milliseconds for network i/o")="1500"; |
bb4bdbaf | 2236 | ::arg().set("threads", "Launch this number of threads")="2"; |
1bc3c142 | 2237 | ::arg().set("processes", "Launch this number of processes (EXPERIMENTAL, DO NOT CHANGE)")="1"; |
5124de27 | 2238 | ::arg().set("config-name","Name of this virtual configuration - will rename the binary image")=""; |
9097239c | 2239 | ::arg().set( "experimental-logfile", "Filename of the log file for JSON parser" )= "/var/log/pdns.log"; |
88d77d73 CH |
2240 | ::arg().setSwitch("experimental-webserver", "Start a webserver for monitoring") = "no"; |
2241 | ::arg().set("experimental-webserver-address", "IP Address of webserver to listen on") = "127.0.0.1"; | |
2242 | ::arg().set("experimental-webserver-port", "Port of webserver to listen on") = "8082"; | |
2243 | ::arg().set("experimental-webserver-password", "Password required for accessing the webserver") = ""; | |
69e7f117 | 2244 | ::arg().set("webserver-allow-from","Webserver access is only allowed from these subnets")="0.0.0.0/0,::/0"; |
c348c0c8 | 2245 | ::arg().set("experimental-api-config-dir", "Directory where REST API stores config and zones") = ""; |
bbef8f04 | 2246 | ::arg().set("experimental-api-key", "REST API Static authentication key (required for API use)") = ""; |
cc08b5a9 | 2247 | ::arg().set("carbon-ourname", "If set, overrides our reported hostname for carbon stats")=""; |
2c78bd57 | 2248 | ::arg().set("carbon-server", "If set, send metrics in carbon (graphite) format to this server")=""; |
2249 | ::arg().set("carbon-interval", "Number of seconds between carbon (graphite) updates")="30"; | |
b4ae7322 | 2250 | ::arg().set("experimental-api-readonly", "If the JSON API should disallow data modification") = "no"; |
c038218b | 2251 | ::arg().set("quiet","Suppress logging of questions and answers")=""; |
f27e6356 | 2252 | ::arg().set("logging-facility","Facility to log messages as. 0 corresponds to local0")=""; |
2e3d8a19 | 2253 | ::arg().set("config-dir","Location of configuration directory (recursor.conf)")=SYSCONFDIR; |
fdbf35ac BH |
2254 | ::arg().set("socket-owner","Owner of socket")=""; |
2255 | ::arg().set("socket-group","Group of socket")=""; | |
2256 | ::arg().set("socket-mode", "Permissions for socket")=""; | |
fdbf35ac | 2257 | |
2e3d8a19 BH |
2258 | ::arg().set("socket-dir","Where the controlsocket will live")=LOCALSTATEDIR; |
2259 | ::arg().set("delegation-only","Which domains we only accept delegations from")=""; | |
2260 | ::arg().set("query-local-address","Source IP address for sending queries")="0.0.0.0"; | |
d4fb76e9 | 2261 | ::arg().set("query-local-address6","Source IPv6 address for sending queries. IF UNSET, IPv6 WILL NOT BE USED FOR OUTGOING QUERIES")=""; |
2e3d8a19 | 2262 | ::arg().set("client-tcp-timeout","Timeout in seconds when talking to TCP clients")="2"; |
85c32340 | 2263 | ::arg().set("max-mthreads", "Maximum number of simultaneous Mtasker threads")="2048"; |
2e3d8a19 | 2264 | ::arg().set("max-tcp-clients","Maximum number of simultaneous TCP clients")="128"; |
324dc148 | 2265 | ::arg().set("server-down-max-fails","Maximum number of consecutive timeouts (and unreachables) to mark a server as down ( 0 => disabled )")="64"; |
979edd70 | 2266 | ::arg().set("server-down-throttle-time","Number of seconds to throttle all queries to a server after being marked as down")="60"; |
2e3d8a19 | 2267 | ::arg().set("hint-file", "If set, load root hints from this file")=""; |
b45eb27c | 2268 | ::arg().set("max-cache-entries", "If set, maximum number of entries in the main cache")="1000000"; |
a9af3782 | 2269 | ::arg().set("max-negative-ttl", "maximum number of seconds to keep a negative cached entry in memory")="3600"; |
c3e753c7 | 2270 | ::arg().set("max-cache-ttl", "maximum number of seconds to keep a cached entry in memory")="86400"; |
1051f8a9 | 2271 | ::arg().set("packetcache-ttl", "maximum number of seconds to keep a cached entry in packetcache")="3600"; |
927c12b0 | 2272 | ::arg().set("max-packetcache-entries", "maximum number of entries to keep in the packetcache")="500000"; |
1051f8a9 | 2273 | ::arg().set("packetcache-servfail-ttl", "maximum number of seconds to keep a cached servfail entry in packetcache")="60"; |
7f7b8d55 | 2274 | ::arg().set("server-id", "Returned when queried for 'server.id' TXT or NSID, defaults to hostname")=""; |
92011b8f | 2275 | ::arg().set("stats-ringbuffer-entries", "maximum number of packets to store statistics for")="10000"; |
ba1a571d | 2276 | ::arg().set("version-string", "string reported on version.pdns or version.bind")=fullVersionString(); |
49a699c4 | 2277 | ::arg().set("allow-from", "If set, only allow these comma separated netmasks to recurse")=LOCAL_NETS; |
2c95fc65 | 2278 | ::arg().set("allow-from-file", "If set, load allowed netmasks from this file")=""; |
51e2144e | 2279 | ::arg().set("entropy-source", "If set, read entropy from this file")="/dev/urandom"; |
12cd44ee | 2280 | ::arg().set("dont-query", "If set, do not query these netmasks for DNS data")=DONT_QUERY; |
4e120339 | 2281 | ::arg().set("max-tcp-per-client", "If set, maximum number of TCP sessions per client (IP address)")="0"; |
0d5f0a9f | 2282 | ::arg().set("spoof-nearmiss-max", "If non-zero, assume spoofing after this many near misses")="20"; |
4ef015cd | 2283 | ::arg().set("single-socket", "If set, only use a single socket for outgoing queries")="off"; |
5605c067 BH |
2284 | ::arg().set("auth-zones", "Zones for which we have authoritative data, comma separated domain=file pairs ")=""; |
2285 | ::arg().set("forward-zones", "Zones for which we forward queries, comma separated domain=ip pairs")=""; | |
927c12b0 BH |
2286 | ::arg().set("forward-zones-recurse", "Zones for which we forward queries with recursion bit, comma separated domain=ip pairs")=""; |
2287 | ::arg().set("forward-zones-file", "File with (+)domain=ip pairs for forwarding")=""; | |
5605c067 | 2288 | ::arg().set("export-etc-hosts", "If we should serve up contents from /etc/hosts")="off"; |
ac0b4eb3 | 2289 | ::arg().set("export-etc-hosts-search-suffix", "Also serve up the contents of /etc/hosts with this suffix")=""; |
3ea54bf0 | 2290 | ::arg().set("etc-hosts-file", "Path to 'hosts' file")="/etc/hosts"; |
9bc8c14c | 2291 | ::arg().set("serve-rfc1918", "If we should be authoritative for RFC 1918 private IP space")=""; |
4485aa35 | 2292 | ::arg().set("lua-dns-script", "Filename containing an optional 'lua' script that will be used to modify dns answers")=""; |
08f3f638 | 2293 | ::arg().set("latency-statistic-size","Number of latency values to calculate the qa-latency average")="10000"; |
578361b3 | 2294 | // ::arg().setSwitch( "disable-edns-ping", "Disable EDNSPing - EXPERIMENTAL, LEAVE DISABLED" )= "no"; |
2295 | ::arg().setSwitch( "disable-edns", "Disable EDNS - EXPERIMENTAL, LEAVE DISABLED" )= ""; | |
1bc3c142 | 2296 | ::arg().setSwitch( "disable-packetcache", "Disable packetcache" )= "no"; |
966d3ba8 | 2297 | ::arg().setSwitch( "pdns-distributes-queries", "If PowerDNS itself should distribute queries over threads")=""; |
e661a20b | 2298 | ::arg().setSwitch( "any-to-tcp","Answer ANY queries with tc=1, shunting to TCP" )="no"; |
a09a8ce0 | 2299 | ::arg().set("udp-truncation-threshold", "Maximum UDP response size before we truncate")="1680"; |
aadceba8 | 2300 | ::arg().set("minimum-ttl-override", "Set under adverse conditions, a minimum TTL")="0"; |
173d790e | 2301 | ::arg().set("max-qperq", "Maximum outgoing queries per query")="50"; |
a09a8ce0 | 2302 | |
68e6df3c | 2303 | ::arg().set("include-dir","Include *.conf files from this directory")=""; |
d67620e4 | 2304 | ::arg().set("security-poll-suffix","Domain name from which to query security update notifications")="secpoll.powerdns.com."; |
2e3d8a19 BH |
2305 | |
2306 | ::arg().setCmd("help","Provide a helpful message"); | |
ba1a571d | 2307 | ::arg().setCmd("version","Print version string"); |
d5141417 | 2308 | ::arg().setCmd("config","Output blank configuration"); |
f27e6356 | 2309 | L.toConsole(Logger::Info); |
2e3d8a19 | 2310 | ::arg().laxParse(argc,argv); // do a lax parse |
c75a6a9e | 2311 | |
2d733c0f CH |
2312 | string configname=::arg()["config-dir"]+"/recursor.conf"; |
2313 | if(::arg()["config-name"]!="") { | |
2314 | configname=::arg()["config-dir"]+"/recursor-"+::arg()["config-name"]+".conf"; | |
5124de27 | 2315 | s_programname+="-"+::arg()["config-name"]; |
2d733c0f CH |
2316 | } |
2317 | cleanSlashes(configname); | |
5124de27 | 2318 | |
577cf284 BH |
2319 | if(::arg().mustDo("config")) { |
2320 | cout<<::arg().configstring()<<endl; | |
2321 | exit(0); | |
2322 | } | |
2323 | ||
2e3d8a19 | 2324 | if(!::arg().file(configname.c_str())) |
c75a6a9e BH |
2325 | L<<Logger::Warning<<"Unable to parse configuration file '"<<configname<<"'"<<endl; |
2326 | ||
2e3d8a19 | 2327 | ::arg().parse(argc,argv); |
c836dc19 | 2328 | |
2e3d8a19 | 2329 | ::arg().set("delegation-only")=toLower(::arg()["delegation-only"]); |
562588a3 | 2330 | |
61d74169 | 2331 | if(::arg().asNum("threads")==1) |
2332 | ::arg().set("pdns-distributes-queries")="no"; | |
2333 | ||
2e3d8a19 | 2334 | if(::arg().mustDo("help")) { |
ff5ba4f9 WA |
2335 | cout<<"syntax:"<<endl<<endl; |
2336 | cout<<::arg().helpstring(::arg()["help"])<<endl; | |
2337 | exit(0); | |
b636533b | 2338 | } |
5e3de507 | 2339 | if(::arg().mustDo("version")) { |
ba1a571d | 2340 | showProductVersion(); |
3613a51c | 2341 | showBuildConfiguration(); |
5e3de507 BH |
2342 | exit(99); |
2343 | } | |
b636533b | 2344 | |
34162f8f CH |
2345 | Logger::Urgency logUrgency = (Logger::Urgency)::arg().asNum("loglevel"); |
2346 | if (logUrgency < Logger::Error) | |
2347 | logUrgency = Logger::Error; | |
d738f00f | 2348 | if(!g_quiet) |
2349 | logUrgency = Logger::Info; | |
34162f8f CH |
2350 | L.setLoglevel(logUrgency); |
2351 | L.toConsole(logUrgency); | |
2352 | ||
f7c1d4e3 | 2353 | serviceMain(argc, argv); |
288f4aa9 | 2354 | } |
3f81d239 | 2355 | catch(PDNSException &ae) { |
c836dc19 | 2356 | L<<Logger::Error<<"Exception: "<<ae.reason<<endl; |
22030c37 | 2357 | ret=EXIT_FAILURE; |
288f4aa9 | 2358 | } |
fdbf35ac | 2359 | catch(std::exception &e) { |
c836dc19 | 2360 | L<<Logger::Error<<"STL Exception: "<<e.what()<<endl; |
22030c37 | 2361 | ret=EXIT_FAILURE; |
288f4aa9 BH |
2362 | } |
2363 | catch(...) { | |
c836dc19 | 2364 | L<<Logger::Error<<"any other exception in main: "<<endl; |
22030c37 | 2365 | ret=EXIT_FAILURE; |
288f4aa9 | 2366 | } |
caa6eefa | 2367 | |
22030c37 | 2368 | return ret; |
288f4aa9 | 2369 | } |