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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; |
b3b5459d | 84 | __thread RemoteKeeper* t_remotes; |
77499b05 | 85 | __thread shared_ptr<Regex>* t_traceRegex; |
674cf0f6 | 86 | |
d7dae798 BH |
87 | RecursorControlChannel s_rcc; // only active in thread 0 |
88 | ||
89 | // for communicating with our threads | |
49a699c4 BH |
90 | struct ThreadPipeSet |
91 | { | |
92 | int writeToThread; | |
93 | int readToThread; | |
94 | int writeFromThread; | |
95 | int readFromThread; | |
96 | }; | |
3ea54bf0 | 97 | |
d7dae798 | 98 | vector<ThreadPipeSet> g_pipes; // effectively readonly after startup |
5c633640 | 99 | |
d7dae798 | 100 | SyncRes::domainmap_t* g_initialDomainMap; // new threads needs this to be setup |
49a699c4 BH |
101 | |
102 | #include "namespaces.hh" | |
3ea54bf0 | 103 | |
49a699c4 | 104 | __thread MemRecursorCache* t_RC; |
16beeaa4 | 105 | __thread RecursorPacketCache* t_packetCache; |
1d5b3ce6 BH |
106 | RecursorStats g_stats; |
107 | bool g_quiet; | |
49a699c4 | 108 | |
1bc3c142 BH |
109 | bool g_weDistributeQueries; // if true, only 1 thread listens on the incoming query sockets |
110 | ||
41942bb3 | 111 | __thread NetmaskGroup* t_allowFrom; |
49a699c4 BH |
112 | static NetmaskGroup* g_initialAllowFrom; // new thread needs to be setup with this |
113 | ||
eb5bae86 | 114 | NetmaskGroup* g_dontQuery; |
2d733c0f | 115 | string s_programname="pdns_recursor"; |
49a699c4 | 116 | |
40a3dd64 BH |
117 | typedef vector<int> tcpListenSockets_t; |
118 | tcpListenSockets_t g_tcpListenSockets; // shared across threads, but this is fine, never written to from a thread. All threads listen on all sockets | |
3159c9ef | 119 | int g_tcpTimeout; |
85c32340 | 120 | unsigned int g_maxMThreads; |
d7dae798 | 121 | struct timeval g_now; // timestamp, updated (too) frequently |
84433b79 | 122 | typedef map<int, ComboAddress> listenSocketsAddresses_t; // is shared across all threads right now |
123 | listenSocketsAddresses_t g_listenSocketsAddresses; // is shared across all threads right now | |
18af64a8 | 124 | |
d7dae798 BH |
125 | __thread MT_t* MT; // the big MTasker |
126 | ||
c3828c03 BH |
127 | unsigned int g_numThreads; |
128 | ||
12cd44ee | 129 | #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" |
130 | // Bad Nets taken from both: | |
131 | // http://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml | |
132 | // and | |
133 | // http://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml | |
134 | // where such a network may not be considered a valid destination | |
135 | #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" | |
136 | #define DONT_QUERY LOCAL_NETS ", " BAD_NETS | |
49a699c4 | 137 | |
d7dae798 | 138 | //! used to send information to a newborn mthread |
ea634573 | 139 | struct DNSComboWriter { |
3ea54bf0 | 140 | DNSComboWriter(const char* data, uint16_t len, const struct timeval& now) : d_mdp(data, len), d_now(now), |
232f0877 | 141 | d_tcp(false), d_socket(-1) |
ea634573 BH |
142 | {} |
143 | MOADNSParser d_mdp; | |
00c9b8c1 | 144 | void setRemote(const ComboAddress* sa) |
ea634573 | 145 | { |
37d3f960 | 146 | d_remote=*sa; |
ea634573 BH |
147 | } |
148 | ||
149 | void setSocket(int sock) | |
150 | { | |
151 | d_socket=sock; | |
152 | } | |
a1754c6a BH |
153 | |
154 | string getRemote() const | |
155 | { | |
37d3f960 | 156 | return d_remote.toString(); |
a1754c6a BH |
157 | } |
158 | ||
c9e9e5e0 | 159 | struct timeval d_now; |
37d3f960 | 160 | ComboAddress d_remote; |
ea634573 BH |
161 | bool d_tcp; |
162 | int d_socket; | |
cd989c87 | 163 | shared_ptr<TCPConnection> d_tcpConnection; |
ea634573 BH |
164 | }; |
165 | ||
166 | ||
288f4aa9 BH |
167 | ArgvMap &arg() |
168 | { | |
169 | static ArgvMap theArg; | |
170 | return theArg; | |
171 | } | |
4ef015cd | 172 | |
09e6702a | 173 | |
d8f6d49f | 174 | void handleTCPClientWritable(int fd, FDMultiplexer::funcparam_t& var); |
09e6702a | 175 | |
50c81227 | 176 | // -1 is error, 0 is timeout, 1 is success |
5c633640 BH |
177 | int asendtcp(const string& data, Socket* sock) |
178 | { | |
179 | PacketID pident; | |
180 | pident.sock=sock; | |
181 | pident.outMSG=data; | |
23db0a09 | 182 | |
bb4bdbaf | 183 | t_fdm->addWriteFD(sock->getHandle(), handleTCPClientWritable, pident); |
50c81227 | 184 | string packet; |
5c633640 | 185 | |
5b0ddd18 | 186 | int ret=MT->waitEvent(pident, &packet, g_networkTimeoutMsec); |
23db0a09 | 187 | |
9170fbaf | 188 | if(!ret || ret==-1) { // timeout |
bb4bdbaf | 189 | t_fdm->removeWriteFD(sock->getHandle()); |
5c633640 | 190 | } |
50c81227 BH |
191 | else if(packet.size() !=data.size()) { // main loop tells us what it sent out, or empty in case of an error |
192 | return -1; | |
193 | } | |
9170fbaf | 194 | return ret; |
5c633640 BH |
195 | } |
196 | ||
d8f6d49f | 197 | void handleTCPClientReadable(int fd, FDMultiplexer::funcparam_t& var); |
09e6702a | 198 | |
9170fbaf | 199 | // -1 is error, 0 is timeout, 1 is success |
825fa717 | 200 | int arecvtcp(string& data, int len, Socket* sock, bool incompleteOkay) |
288f4aa9 | 201 | { |
50c81227 | 202 | data.clear(); |
5c633640 BH |
203 | PacketID pident; |
204 | pident.sock=sock; | |
205 | pident.inNeeded=len; | |
825fa717 | 206 | pident.inIncompleteOkay=incompleteOkay; |
bb4bdbaf | 207 | t_fdm->addReadFD(sock->getHandle(), handleTCPClientReadable, pident); |
5c633640 | 208 | |
bb4bdbaf | 209 | int ret=MT->waitEvent(pident,&data, g_networkTimeoutMsec); |
9170fbaf | 210 | if(!ret || ret==-1) { // timeout |
bb4bdbaf | 211 | t_fdm->removeReadFD(sock->getHandle()); |
288f4aa9 | 212 | } |
50c81227 BH |
213 | else if(data.empty()) {// error, EOF or other |
214 | return -1; | |
215 | } | |
216 | ||
9170fbaf | 217 | return ret; |
288f4aa9 BH |
218 | } |
219 | ||
5a38281c | 220 | vector<ComboAddress> g_localQueryAddresses4, g_localQueryAddresses6; |
046c5a5d | 221 | const ComboAddress g_local4("0.0.0.0"), g_local6("::"); |
1652a63e | 222 | |
d7dae798 | 223 | //! pick a random query local address |
1652a63e | 224 | ComboAddress getQueryLocalAddress(int family, uint16_t port) |
5a38281c | 225 | { |
1652a63e | 226 | ComboAddress ret; |
5a38281c | 227 | if(family==AF_INET) { |
1652a63e BH |
228 | if(g_localQueryAddresses4.empty()) |
229 | ret = g_local4; | |
230 | else | |
231 | ret = g_localQueryAddresses4[dns_random(g_localQueryAddresses4.size())]; | |
232 | ret.sin4.sin_port = htons(port); | |
5a38281c BH |
233 | } |
234 | else { | |
235 | if(g_localQueryAddresses6.empty()) | |
1652a63e BH |
236 | ret = g_local6; |
237 | else | |
238 | ret = g_localQueryAddresses6[dns_random(g_localQueryAddresses6.size())]; | |
239 | ||
240 | ret.sin6.sin6_port = htons(port); | |
5a38281c | 241 | } |
1652a63e | 242 | return ret; |
5a38281c | 243 | } |
4ef015cd | 244 | |
d8f6d49f | 245 | void handleUDPServerResponse(int fd, FDMultiplexer::funcparam_t&); |
09e6702a | 246 | |
d7dae798 BH |
247 | void setSocketBuffer(int fd, int optname, uint32_t size) |
248 | { | |
249 | uint32_t psize=0; | |
250 | socklen_t len=sizeof(psize); | |
251 | ||
252 | if(!getsockopt(fd, SOL_SOCKET, optname, (char*)&psize, &len) && psize > size) { | |
253 | L<<Logger::Error<<"Not decreasing socket buffer size from "<<psize<<" to "<<size<<endl; | |
254 | return; | |
255 | } | |
256 | ||
257 | if (setsockopt(fd, SOL_SOCKET, optname, (char*)&size, sizeof(size)) < 0 ) | |
258 | L<<Logger::Error<<"Warning: unable to raise socket buffer size to "<<size<<": "<<strerror(errno)<<endl; | |
259 | } | |
260 | ||
261 | ||
262 | static void setSocketReceiveBuffer(int fd, uint32_t size) | |
263 | { | |
264 | setSocketBuffer(fd, SO_RCVBUF, size); | |
265 | } | |
266 | ||
267 | static void setSocketSendBuffer(int fd, uint32_t size) | |
268 | { | |
269 | setSocketBuffer(fd, SO_SNDBUF, size); | |
270 | } | |
271 | ||
272 | ||
4ef015cd BH |
273 | // you can ask this class for a UDP socket to send a query from |
274 | // this socket is not yours, don't even think about deleting it | |
275 | // but after you call 'returnSocket' on it, don't assume anything anymore | |
276 | class UDPClientSocks | |
277 | { | |
4ef015cd | 278 | unsigned int d_numsocks; |
4ef015cd | 279 | public: |
e2642526 | 280 | UDPClientSocks() : d_numsocks(0) |
4ef015cd BH |
281 | { |
282 | } | |
283 | ||
996c89cc | 284 | typedef set<int> socks_t; |
4ef015cd BH |
285 | socks_t d_socks; |
286 | ||
d8f6d49f BH |
287 | // returning -1 means: temporary OS error (ie, out of files), -2 means OS error |
288 | int getSocket(const ComboAddress& toaddr, int* fd) | |
4ef015cd | 289 | { |
d8f6d49f BH |
290 | *fd=makeClientSocket(toaddr.sin4.sin_family); |
291 | if(*fd < 0) // temporary error - receive exception otherwise | |
292 | return -1; | |
293 | ||
294 | if(connect(*fd, (struct sockaddr*)(&toaddr), toaddr.getSocklen()) < 0) { | |
295 | int err = errno; | |
41ff43f8 BH |
296 | // returnSocket(*fd); |
297 | Utility::closesocket(*fd); | |
d8f6d49f | 298 | if(err==ENETUNREACH) // Seth "My Interfaces Are Like A Yo Yo" Arnold special |
4957a608 | 299 | return -2; |
998a4334 | 300 | return -1; |
d8f6d49f | 301 | } |
998a4334 | 302 | |
d8f6d49f | 303 | d_socks.insert(*fd); |
998a4334 | 304 | d_numsocks++; |
d8f6d49f | 305 | return 0; |
4ef015cd BH |
306 | } |
307 | ||
095c3045 BH |
308 | void returnSocket(int fd) |
309 | { | |
310 | socks_t::iterator i=d_socks.find(fd); | |
34801ab1 | 311 | if(i==d_socks.end()) { |
3f81d239 | 312 | throw PDNSException("Trying to return a socket (fd="+lexical_cast<string>(fd)+") not in the pool"); |
34801ab1 | 313 | } |
bb4bdbaf | 314 | returnSocketLocked(i); |
095c3045 BH |
315 | } |
316 | ||
4ef015cd | 317 | // return a socket to the pool, or simply erase it |
bb4bdbaf | 318 | void returnSocketLocked(socks_t::iterator& i) |
4ef015cd | 319 | { |
600fc20b | 320 | if(i==d_socks.end()) { |
3f81d239 | 321 | throw PDNSException("Trying to return a socket not in the pool"); |
600fc20b | 322 | } |
80baf329 | 323 | try { |
bb4bdbaf | 324 | t_fdm->removeReadFD(*i); |
80baf329 BH |
325 | } |
326 | catch(FDMultiplexerException& e) { | |
bb4bdbaf | 327 | // we sometimes return a socket that has not yet been assigned to t_fdm |
80baf329 | 328 | } |
c038218b | 329 | Utility::closesocket(*i); |
998a4334 BH |
330 | |
331 | d_socks.erase(i++); | |
332 | --d_numsocks; | |
4ef015cd | 333 | } |
d8f6d49f BH |
334 | |
335 | // returns -1 for errors which might go away, throws for ones that won't | |
bb4bdbaf | 336 | static int makeClientSocket(int family) |
d8f6d49f BH |
337 | { |
338 | int ret=(int)socket(family, SOCK_DGRAM, 0); | |
42c235e5 | 339 | |
d8f6d49f BH |
340 | if(ret < 0 && errno==EMFILE) // this is not a catastrophic error |
341 | return ret; | |
342 | ||
343 | if(ret<0) | |
3f81d239 | 344 | throw PDNSException("Making a socket for resolver (family = "+lexical_cast<string>(family)+"): "+stringerror()); |
36855b53 BH |
345 | |
346 | Utility::setCloseOnExec(ret); | |
5a38281c | 347 | |
d8f6d49f BH |
348 | int tries=10; |
349 | while(--tries) { | |
1652a63e BH |
350 | uint16_t port; |
351 | ||
d8f6d49f | 352 | if(tries==1) // fall back to kernel 'random' |
4957a608 | 353 | port = 0; |
1652a63e BH |
354 | else |
355 | port = 1025 + dns_random(64510); | |
356 | ||
357 | ComboAddress sin=getQueryLocalAddress(family, port); // does htons for us | |
5a38281c | 358 | |
5a38281c | 359 | if (::bind(ret, (struct sockaddr *)&sin, sin.getSocklen()) >= 0) |
4957a608 | 360 | break; |
d8f6d49f BH |
361 | } |
362 | if(!tries) | |
3f81d239 | 363 | throw PDNSException("Resolver binding to local query client socket: "+stringerror()); |
d8f6d49f BH |
364 | |
365 | Utility::setNonBlocking(ret); | |
366 | return ret; | |
367 | } | |
49a699c4 BH |
368 | }; |
369 | ||
370 | static __thread UDPClientSocks* t_udpclientsocks; | |
4ef015cd | 371 | |
288f4aa9 | 372 | /* these two functions are used by LWRes */ |
34801ab1 | 373 | // -2 is OS error, -1 is error that depends on the remote, > 0 is success |
787e5eab | 374 | int asendto(const char *data, int len, int flags, |
4957a608 | 375 | const ComboAddress& toaddr, uint16_t id, const string& domain, uint16_t qtype, int* fd) |
288f4aa9 | 376 | { |
34801ab1 BH |
377 | |
378 | PacketID pident; | |
787e5eab BH |
379 | pident.domain = domain; |
380 | pident.remote = toaddr; | |
381 | pident.type = qtype; | |
34801ab1 BH |
382 | |
383 | // see if there is an existing outstanding request we can chain on to, using partial equivalence function | |
384 | pair<MT_t::waiters_t::iterator, MT_t::waiters_t::iterator> chain=MT->d_waiters.equal_range(pident, PacketIDBirthdayCompare()); | |
385 | ||
386 | for(; chain.first != chain.second; chain.first++) { | |
387 | if(chain.first->key.fd > -1) { // don't chain onto existing chained waiter! | |
e27e91a8 | 388 | /* |
4665c31e BH |
389 | cerr<<"Orig: "<<pident.domain<<", "<<pident.remote.toString()<<", id="<<id<<endl; |
390 | cerr<<"Had hit: "<< chain.first->key.domain<<", "<<chain.first->key.remote.toString()<<", id="<<chain.first->key.id | |
4957a608 | 391 | <<", count="<<chain.first->key.chain.size()<<", origfd: "<<chain.first->key.fd<<endl; |
e27e91a8 | 392 | */ |
34801ab1 BH |
393 | chain.first->key.chain.insert(id); // we can chain |
394 | *fd=-1; // gets used in waitEvent / sendEvent later on | |
395 | return 1; | |
396 | } | |
397 | } | |
398 | ||
49a699c4 | 399 | int ret=t_udpclientsocks->getSocket(toaddr, fd); |
d8f6d49f BH |
400 | if(ret < 0) |
401 | return ret; | |
34801ab1 | 402 | |
998a4334 BH |
403 | pident.fd=*fd; |
404 | pident.id=id; | |
998a4334 | 405 | |
bb4bdbaf BH |
406 | t_fdm->addReadFD(*fd, handleUDPServerResponse, pident); |
407 | ret = send(*fd, data, len, 0); | |
408 | ||
5b0ddd18 | 409 | int tmp = errno; |
bb4bdbaf | 410 | |
7302ed0a | 411 | if(ret < 0) |
49a699c4 | 412 | t_udpclientsocks->returnSocket(*fd); |
bb4bdbaf | 413 | |
5b0ddd18 | 414 | errno = tmp; // this is for logging purposes only |
7302ed0a | 415 | return ret; |
288f4aa9 BH |
416 | } |
417 | ||
9170fbaf | 418 | // -1 is error, 0 is timeout, 1 is success |
787e5eab | 419 | int arecvfrom(char *data, int len, int flags, const ComboAddress& fromaddr, int *d_len, |
4957a608 | 420 | uint16_t id, const string& domain, uint16_t qtype, int fd, struct timeval* now) |
288f4aa9 | 421 | { |
0d5f0a9f BH |
422 | static optional<unsigned int> nearMissLimit; |
423 | if(!nearMissLimit) | |
424 | nearMissLimit=::arg().asNum("spoof-nearmiss-max"); | |
425 | ||
288f4aa9 | 426 | PacketID pident; |
4ef015cd | 427 | pident.fd=fd; |
288f4aa9 | 428 | pident.id=id; |
0d5f0a9f | 429 | pident.domain=domain; |
787e5eab | 430 | pident.type = qtype; |
996c89cc | 431 | pident.remote=fromaddr; |
b636533b | 432 | |
288f4aa9 | 433 | string packet; |
5b0ddd18 | 434 | int ret=MT->waitEvent(pident, &packet, g_networkTimeoutMsec, now); |
34801ab1 | 435 | |
9170fbaf | 436 | if(ret > 0) { |
996c89cc | 437 | if(packet.empty()) // means "error" |
998a4334 | 438 | return -1; |
998a4334 | 439 | |
705f31ae | 440 | *d_len=(int)packet.size(); |
9170fbaf | 441 | memcpy(data,packet.c_str(),min(len,*d_len)); |
0d5f0a9f | 442 | if(*nearMissLimit && pident.nearMisses > *nearMissLimit) { |
996c89cc | 443 | L<<Logger::Error<<"Too many ("<<pident.nearMisses<<" > "<<*nearMissLimit<<") bogus answers for '"<<domain<<"' from "<<fromaddr.toString()<<", assuming spoof attempt."<<endl; |
0d5f0a9f | 444 | g_stats.spoofCount++; |
35ce8576 BH |
445 | return -1; |
446 | } | |
288f4aa9 | 447 | } |
09e6702a | 448 | else { |
34801ab1 | 449 | if(fd >= 0) |
49a699c4 | 450 | t_udpclientsocks->returnSocket(fd); |
09e6702a | 451 | } |
9170fbaf | 452 | return ret; |
288f4aa9 BH |
453 | } |
454 | ||
aa4e4cbf | 455 | |
87a5ea63 | 456 | string s_pidfname; |
88def049 BH |
457 | static void writePid(void) |
458 | { | |
18e7758c | 459 | ofstream of(s_pidfname.c_str(), std::ios_base::app); |
88def049 | 460 | if(of) |
705f31ae | 461 | of<< Utility::getpid() <<endl; |
88def049 | 462 | else |
87a5ea63 | 463 | L<<Logger::Error<<"Requested to write pid for "<<Utility::getpid()<<" to "<<s_pidfname<<" failed: "<<strerror(errno)<<endl; |
88def049 BH |
464 | } |
465 | ||
bd0289fc BH |
466 | typedef map<ComboAddress, uint32_t, ComboAddress::addressOnlyLessThan> tcpClientCounts_t; |
467 | tcpClientCounts_t __thread* t_tcpClientCounts; | |
0e9d9ce2 | 468 | |
cd989c87 BH |
469 | TCPConnection::TCPConnection(int fd, const ComboAddress& addr) : d_remote(addr), d_fd(fd) |
470 | { | |
1bc9e6bd | 471 | ++s_currentConnections; |
cd989c87 | 472 | (*t_tcpClientCounts)[d_remote]++; |
0e408828 | 473 | } |
cd989c87 BH |
474 | |
475 | TCPConnection::~TCPConnection() | |
0e408828 | 476 | { |
cd989c87 BH |
477 | if(Utility::closesocket(d_fd) < 0) |
478 | unixDie("closing socket for TCPConnection"); | |
479 | if(t_tcpClientCounts->count(d_remote) && !(*t_tcpClientCounts)[d_remote]--) | |
480 | t_tcpClientCounts->erase(d_remote); | |
1bc9e6bd | 481 | --s_currentConnections; |
0e408828 | 482 | } |
0e9d9ce2 | 483 | |
1bc9e6bd | 484 | AtomicCounter TCPConnection::s_currentConnections; |
d8f6d49f | 485 | void handleRunningTCPQuestion(int fd, FDMultiplexer::funcparam_t& var); |
6dcd28c3 | 486 | |
2cc13433 BH |
487 | void updateRcodeStats(int res) |
488 | { | |
489 | switch(res) { | |
490 | case RCode::ServFail: | |
491 | g_stats.servFails++; | |
492 | break; | |
493 | case RCode::NXDomain: | |
494 | g_stats.nxDomains++; | |
495 | break; | |
496 | case RCode::NoError: | |
497 | g_stats.noErrors++; | |
498 | break; | |
499 | } | |
500 | } | |
501 | ||
79332bff F |
502 | ResponseStats g_rs; |
503 | ||
288f4aa9 BH |
504 | void startDoResolve(void *p) |
505 | { | |
7b1469bb | 506 | DNSComboWriter* dc=(DNSComboWriter *)p; |
0fb1501b | 507 | string loginfo=""; |
b23b8614 | 508 | |
288f4aa9 | 509 | try { |
0fb1501b | 510 | loginfo=" (while setting loginfo)"; |
fab3ed34 | 511 | loginfo=" ("+dc->d_mdp.d_qname+"/"+DNSRecordContent::NumberToType(dc->d_mdp.d_qtype)+" from "+(dc->d_remote.toString())+")"; |
b18ace73 | 512 | uint32_t maxanswersize= dc->d_tcp ? 65535 : min((uint16_t) 512, g_udpTruncationThreshold); |
7f7b8d55 | 513 | EDNSOpts edo; |
56b4d21b | 514 | if(getEDNSOpts(dc->d_mdp, &edo) && !dc->d_tcp) { |
b18ace73 | 515 | maxanswersize = min(edo.d_packetsize, g_udpTruncationThreshold); |
10321a98 | 516 | } |
84433b79 | 517 | ComboAddress local; |
518 | listenSocketsAddresses_t::const_iterator lociter; | |
ea634573 | 519 | vector<DNSResourceRecord> ret; |
ea634573 | 520 | vector<uint8_t> packet; |
b23b8614 BH |
521 | |
522 | DNSPacketWriter pw(packet, dc->d_mdp.d_qname, dc->d_mdp.d_qtype, dc->d_mdp.d_qclass); | |
ea634573 BH |
523 | |
524 | pw.getHeader()->aa=0; | |
525 | pw.getHeader()->ra=1; | |
c154c8a4 | 526 | pw.getHeader()->qr=1; |
bb4bdbaf | 527 | pw.getHeader()->tc=0; |
ea634573 | 528 | pw.getHeader()->id=dc->d_mdp.d_header.id; |
10321a98 | 529 | pw.getHeader()->rd=dc->d_mdp.d_header.rd; |
ea634573 | 530 | |
904d3219 PD |
531 | uint32_t minTTL=std::numeric_limits<uint32_t>::max(); |
532 | ||
533 | SyncRes sr(dc->d_now); | |
534 | bool tracedQuery=false; // we could consider letting Lua know about this too | |
535 | bool variableAnswer = false; | |
536 | ||
56b4d21b PD |
537 | int res; |
538 | ||
e661a20b | 539 | if(dc->d_mdp.d_qtype==QType::ANY && !dc->d_tcp && g_anyToTcp) { |
56b4d21b PD |
540 | pw.getHeader()->tc = 1; |
541 | res = 0; | |
542 | variableAnswer = true; | |
e661a20b PD |
543 | goto sendit; |
544 | } | |
545 | ||
77499b05 BH |
546 | if(t_traceRegex->get() && (*t_traceRegex)->match(dc->d_mdp.d_qname)) { |
547 | sr.setLogMode(SyncRes::Store); | |
548 | tracedQuery=true; | |
549 | } | |
550 | ||
551 | if(!g_quiet || tracedQuery) | |
552 | L<<Logger::Warning<<t_id<<" ["<<MT->getTid()<<"] " << (dc->d_tcp ? "TCP " : "") << "question for '"<<dc->d_mdp.d_qname<<"|" | |
8a63d3ce | 553 | <<DNSRecordContent::NumberToType(dc->d_mdp.d_qtype)<<"' from "<<dc->getRemote()<<endl; |
c75a6a9e | 554 | |
fededf47 | 555 | sr.setId(MT->getTid()); |
67828389 | 556 | if(!dc->d_mdp.d_header.rd) |
c836dc19 BH |
557 | sr.setCacheOnly(); |
558 | ||
84433b79 | 559 | local.sin4.sin_family = dc->d_remote.sin4.sin_family; |
560 | ||
561 | lociter = g_listenSocketsAddresses.find(dc->d_socket); | |
562 | if(lociter != g_listenSocketsAddresses.end()) { | |
563 | local = lociter->second; | |
564 | } | |
565 | else { | |
566 | socklen_t len = local.getSocklen(); | |
567 | getsockname(dc->d_socket, (sockaddr*)&local, &len); // if this fails, we're ok with it | |
568 | } | |
569 | ||
570 | // if there is a RecursorLua active, and it 'took' the query in preResolve, we don't launch beginResolve | |
571 | 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 |
572 | try { |
573 | res = sr.beginResolve(dc->d_mdp.d_qname, QType(dc->d_mdp.d_qtype), dc->d_mdp.d_qclass, ret); | |
574 | } | |
575 | catch(ImmediateServFailException &e) { | |
37aa9904 | 576 | L<<Logger::Error<<"Sending SERVFAIL to "<<dc->getRemote()<<" during resolve of '"<<dc->d_mdp.d_qname<<"' because: "<<e.reason<<endl; |
44971ca0 PD |
577 | |
578 | res = RCode::ServFail; | |
579 | } | |
4485aa35 | 580 | |
674cf0f6 | 581 | if(t_pdl->get()) { |
bd53ea9d | 582 | if(res == RCode::NoError) { |
232f0877 CH |
583 | vector<DNSResourceRecord>::const_iterator i; |
584 | for(i=ret.begin(); i!=ret.end(); ++i) | |
585 | if(i->qtype.getCode() == dc->d_mdp.d_qtype && i->d_place == DNSResourceRecord::ANSWER) | |
586 | break; | |
587 | if(i == ret.end()) | |
84433b79 | 588 | (*t_pdl)->nodata(dc->d_remote,local, dc->d_mdp.d_qname, QType(dc->d_mdp.d_qtype), ret, res, &variableAnswer); |
232f0877 CH |
589 | } |
590 | else if(res == RCode::NXDomain) | |
84433b79 | 591 | (*t_pdl)->nxdomain(dc->d_remote,local, dc->d_mdp.d_qname, QType(dc->d_mdp.d_qtype), ret, res, &variableAnswer); |
bd53ea9d | 592 | |
84433b79 | 593 | (*t_pdl)->postresolve(dc->d_remote,local, dc->d_mdp.d_qname, QType(dc->d_mdp.d_qtype), ret, res, &variableAnswer); |
d2322a5e | 594 | } |
4485aa35 | 595 | } |
99c69ed3 | 596 | |
25456896 | 597 | if(res == RecursorBehaviour::DROP) { |
e9c2ad3a | 598 | g_stats.policyDrops++; |
ae7e77ad | 599 | delete dc; |
600 | dc=0; | |
601 | return; | |
602 | } | |
25456896 | 603 | if(tracedQuery || res == RecursorBehaviour::PASS || res == RCode::ServFail || pw.getHeader()->rcode == RCode::ServFail) |
85ffbc53 | 604 | { |
85ffbc53 PD |
605 | string trace(sr.getTrace()); |
606 | if(!trace.empty()) { | |
607 | vector<string> lines; | |
608 | boost::split(lines, trace, boost::is_any_of("\n")); | |
609 | BOOST_FOREACH(const string& line, lines) { | |
610 | if(!line.empty()) | |
611 | L<<Logger::Warning<< line << endl; | |
612 | } | |
613 | } | |
614 | } | |
79332bff | 615 | |
25456896 | 616 | if(res == RecursorBehaviour::PASS) { |
0fe1d080 PD |
617 | pw.getHeader()->rcode=RCode::ServFail; |
618 | // no commit here, because no record | |
619 | g_stats.servFails++; | |
620 | } | |
288f4aa9 | 621 | else { |
ea634573 | 622 | pw.getHeader()->rcode=res; |
2cc13433 | 623 | updateRcodeStats(res); |
77499b05 | 624 | |
c154c8a4 | 625 | if(ret.size()) { |
92476c8b | 626 | orderAndShuffle(ret); |
4957a608 BH |
627 | for(vector<DNSResourceRecord>::const_iterator i=ret.begin(); i!=ret.end(); ++i) { |
628 | pw.startRecord(i->qname, i->qtype.getCode(), i->ttl, i->qclass, (DNSPacketWriter::Place)i->d_place); | |
629 | minTTL = min(minTTL, i->ttl); | |
630 | if(i->qtype.getCode() == QType::A) { // blast out A record w/o doing whole dnswriter thing | |
631 | uint32_t ip=0; | |
632 | IpToU32(i->content, &ip); | |
633 | pw.xfr32BitInt(htonl(ip)); | |
634 | } else { | |
635 | shared_ptr<DNSRecordContent> drc(DNSRecordContent::mastermake(i->qtype.getCode(), i->qclass, i->content)); | |
636 | drc->toPacket(pw); | |
637 | } | |
dffbaa08 | 638 | if(pw.size() > maxanswersize) { |
4957a608 BH |
639 | pw.rollback(); |
640 | if(i->d_place==DNSResourceRecord::ANSWER) // only truncate if we actually omitted parts of the answer | |
add935a2 | 641 | { |
4957a608 | 642 | pw.getHeader()->tc=1; |
add935a2 PD |
643 | pw.truncate(); |
644 | } | |
4957a608 BH |
645 | goto sendit; // need to jump over pw.commit |
646 | } | |
647 | } | |
b23b8614 | 648 | |
18af64a8 | 649 | pw.commit(); |
ea634573 | 650 | } |
288f4aa9 | 651 | } |
10321a98 | 652 | sendit:; |
79332bff | 653 | g_rs.submitResponse(dc->d_mdp.d_qtype, packet.size(), !dc->d_tcp); |
ea634573 | 654 | if(!dc->d_tcp) { |
c038218b | 655 | sendto(dc->d_socket, (const char*)&*packet.begin(), packet.size(), 0, (struct sockaddr *)(&dc->d_remote), dc->d_remote.getSocklen()); |
99c69ed3 | 656 | if(!SyncRes::s_nopacketcache && !variableAnswer ) { |
79332bff F |
657 | t_packetCache->insertResponsePacket(string((const char*)&*packet.begin(), packet.size()), |
658 | g_now.tv_sec, | |
659 | min(minTTL, | |
660 | (pw.getHeader()->rcode == RCode::ServFail) ? SyncRes::s_packetcacheservfailttl : SyncRes::s_packetcachettl | |
661 | ) | |
662 | ); | |
1051f8a9 | 663 | } |
feccc9fc | 664 | } |
9c495589 BH |
665 | else { |
666 | char buf[2]; | |
ea634573 BH |
667 | buf[0]=packet.size()/256; |
668 | buf[1]=packet.size()%256; | |
feccc9fc | 669 | |
c038218b | 670 | Utility::iovec iov[2]; |
feccc9fc | 671 | |
ea634573 BH |
672 | iov[0].iov_base=(void*)buf; iov[0].iov_len=2; |
673 | iov[1].iov_base=(void*)&*packet.begin(); iov[1].iov_len = packet.size(); | |
feccc9fc | 674 | |
c038218b | 675 | int ret=Utility::writev(dc->d_socket, iov, 2); |
0e9d9ce2 | 676 | bool hadError=true; |
feccc9fc | 677 | |
0e9d9ce2 | 678 | if(ret == 0) |
18af64a8 | 679 | L<<Logger::Error<<"EOF writing TCP answer to "<<dc->getRemote()<<endl; |
0e9d9ce2 | 680 | else if(ret < 0 ) |
18af64a8 | 681 | L<<Logger::Error<<"Error writing TCP answer to "<<dc->getRemote()<<": "<< strerror(errno) <<endl; |
ea634573 | 682 | else if((unsigned int)ret != 2 + packet.size()) |
18af64a8 | 683 | L<<Logger::Error<<"Oops, partial answer sent to "<<dc->getRemote()<<" for "<<dc->d_mdp.d_qname<<" (size="<< (2 + packet.size()) <<", sent "<<ret<<")"<<endl; |
0e9d9ce2 | 684 | else |
18af64a8 | 685 | hadError=false; |
09e6702a BH |
686 | |
687 | // update tcp connection status, either by closing or moving to 'BYTE0' | |
18af64a8 | 688 | |
09e6702a | 689 | if(hadError) { |
18af64a8 | 690 | // no need to remove us from FDM, we weren't there |
c36bc97a | 691 | dc->d_socket = -1; |
09e6702a | 692 | } |
a6ae6414 | 693 | else { |
cd989c87 | 694 | dc->d_tcpConnection->state=TCPConnection::BYTE0; |
18af64a8 | 695 | Utility::gettimeofday(&g_now, 0); // needs to be updated |
cd989c87 BH |
696 | t_fdm->addReadFD(dc->d_socket, handleRunningTCPQuestion, dc->d_tcpConnection); |
697 | t_fdm->setReadTTD(dc->d_socket, g_now, g_tcpTimeout); | |
0e9d9ce2 | 698 | } |
9c495589 | 699 | } |
b23b8614 | 700 | |
1d5b3ce6 | 701 | if(!g_quiet) { |
bb4bdbaf | 702 | L<<Logger::Error<<t_id<<" ["<<MT->getTid()<<"] answer to "<<(dc->d_mdp.d_header.rd?"":"non-rd ")<<"question '"<<dc->d_mdp.d_qname<<"|"<<DNSRecordContent::NumberToType(dc->d_mdp.d_qtype); |
ea634573 | 703 | L<<"': "<<ntohs(pw.getHeader()->ancount)<<" answers, "<<ntohs(pw.getHeader()->arcount)<<" additional, took "<<sr.d_outqueries<<" packets, "<< |
18af64a8 | 704 | sr.d_throttledqueries<<" throttled, "<<sr.d_timeouts<<" timeouts, "<<sr.d_tcpoutqueries<<" tcp connections, rcode="<<res<<endl; |
c75a6a9e | 705 | } |
b23b8614 | 706 | |
49a699c4 | 707 | sr.d_outqueries ? t_RC->cacheMisses++ : t_RC->cacheHits++; |
fe213470 BH |
708 | float spent=makeFloat(sr.d_now-dc->d_now); |
709 | if(spent < 0.001) | |
710 | g_stats.answers0_1++; | |
711 | else if(spent < 0.010) | |
712 | g_stats.answers1_10++; | |
713 | else if(spent < 0.1) | |
714 | g_stats.answers10_100++; | |
715 | else if(spent < 1.0) | |
716 | g_stats.answers100_1000++; | |
717 | else | |
718 | g_stats.answersSlow++; | |
719 | ||
574af7ea | 720 | uint64_t newLat=(uint64_t)(spent*1000000); |
08f3f638 | 721 | newLat = min(newLat,(uint64_t)(g_networkTimeoutMsec*1000)); // outliers of several minutes exist.. |
722 | g_stats.avgLatencyUsec=(1-1.0/g_latencyStatSize)*g_stats.avgLatencyUsec + (float)newLat/g_latencyStatSize; | |
0a6b1027 | 723 | // no worries, we do this for packet cache hits elsewhere |
ea634573 | 724 | delete dc; |
c36bc97a | 725 | dc=0; |
288f4aa9 | 726 | } |
3f81d239 | 727 | catch(PDNSException &ae) { |
0fb1501b | 728 | L<<Logger::Error<<"startDoResolve problem"<<loginfo<<": "<<ae.reason<<endl; |
c36bc97a | 729 | delete dc; |
288f4aa9 | 730 | } |
7b1469bb | 731 | catch(MOADNSException& e) { |
0fb1501b | 732 | L<<Logger::Error<<"DNS parser error"<<loginfo<<": "<<dc->d_mdp.d_qname<<", "<<e.what()<<endl; |
c36bc97a | 733 | delete dc; |
7b1469bb | 734 | } |
fdbf35ac | 735 | catch(std::exception& e) { |
0fb1501b | 736 | L<<Logger::Error<<"STL error"<<loginfo<<": "<<e.what()<<endl; |
c36bc97a | 737 | delete dc; |
c154c8a4 | 738 | } |
288f4aa9 | 739 | catch(...) { |
0fb1501b | 740 | L<<Logger::Error<<"Any other exception in a resolver context"<<loginfo<<endl; |
288f4aa9 | 741 | } |
ec6eacbc BH |
742 | |
743 | g_stats.maxMThreadStackUsage = max(MT->getMaxStackUsage(), g_stats.maxMThreadStackUsage); | |
288f4aa9 BH |
744 | } |
745 | ||
677e2a46 | 746 | void makeControlChannelSocket(int processNum=-1) |
1d5b3ce6 | 747 | { |
2d733c0f | 748 | string sockname=::arg()["socket-dir"]+"/"+s_programname; |
677e2a46 BH |
749 | if(processNum >= 0) |
750 | sockname += "."+lexical_cast<string>(processNum); | |
751 | sockname+=".controlsocket"; | |
41f7a068 | 752 | s_rcc.listen(sockname); |
387de317 | 753 | |
387de317 BH |
754 | int sockowner = -1; |
755 | int sockgroup = -1; | |
756 | ||
757 | if (!::arg().isEmpty("socket-group")) | |
758 | sockgroup=::arg().asGid("socket-group"); | |
759 | if (!::arg().isEmpty("socket-owner")) | |
760 | sockowner=::arg().asUid("socket-owner"); | |
761 | ||
f838ad8d BH |
762 | if (sockgroup > -1 || sockowner > -1) { |
763 | if(chown(sockname.c_str(), sockowner, sockgroup) < 0) { | |
764 | unixDie("Failed to chown control socket"); | |
765 | } | |
766 | } | |
387de317 BH |
767 | |
768 | // do mode change if socket-mode is given | |
769 | if(!::arg().isEmpty("socket-mode")) { | |
770 | mode_t sockmode=::arg().asMode("socket-mode"); | |
771 | chmod(sockname.c_str(), sockmode); | |
772 | } | |
1d5b3ce6 BH |
773 | } |
774 | ||
d8f6d49f | 775 | void handleRunningTCPQuestion(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 776 | { |
cd989c87 | 777 | shared_ptr<TCPConnection> conn=any_cast<shared_ptr<TCPConnection> >(var); |
c038218b | 778 | |
879b3f70 | 779 | if(conn->state==TCPConnection::BYTE0) { |
cd989c87 | 780 | int bytes=recv(conn->getFD(), conn->data, 2, 0); |
09e6702a | 781 | if(bytes==1) |
667f7e60 | 782 | conn->state=TCPConnection::BYTE1; |
09e6702a | 783 | if(bytes==2) { |
a0aa4f64 | 784 | conn->qlen=(((unsigned char)conn->data[0]) << 8)+ (unsigned char)conn->data[1]; |
667f7e60 BH |
785 | conn->bytesread=0; |
786 | conn->state=TCPConnection::GETQUESTION; | |
09e6702a BH |
787 | } |
788 | if(!bytes || bytes < 0) { | |
bb4bdbaf | 789 | t_fdm->removeReadFD(fd); |
09e6702a BH |
790 | return; |
791 | } | |
792 | } | |
667f7e60 | 793 | else if(conn->state==TCPConnection::BYTE1) { |
cd989c87 | 794 | int bytes=recv(conn->getFD(), conn->data+1, 1, 0); |
09e6702a | 795 | if(bytes==1) { |
667f7e60 | 796 | conn->state=TCPConnection::GETQUESTION; |
a0aa4f64 | 797 | conn->qlen=(((unsigned char)conn->data[0]) << 8)+ (unsigned char)conn->data[1]; |
667f7e60 | 798 | conn->bytesread=0; |
09e6702a BH |
799 | } |
800 | if(!bytes || bytes < 0) { | |
801 | if(g_logCommonErrors) | |
cd989c87 | 802 | L<<Logger::Error<<"TCP client "<< conn->d_remote.toString() <<" disconnected after first byte"<<endl; |
bb4bdbaf | 803 | t_fdm->removeReadFD(fd); |
09e6702a BH |
804 | return; |
805 | } | |
806 | } | |
667f7e60 | 807 | else if(conn->state==TCPConnection::GETQUESTION) { |
cd989c87 | 808 | int bytes=recv(conn->getFD(), conn->data + conn->bytesread, conn->qlen - conn->bytesread, 0); |
09e6702a | 809 | if(!bytes || bytes < 0) { |
cd989c87 | 810 | L<<Logger::Error<<"TCP client "<< conn->d_remote.toString() <<" disconnected while reading question body"<<endl; |
bb4bdbaf | 811 | t_fdm->removeReadFD(fd); |
09e6702a BH |
812 | return; |
813 | } | |
667f7e60 BH |
814 | conn->bytesread+=bytes; |
815 | if(conn->bytesread==conn->qlen) { | |
bb4bdbaf | 816 | t_fdm->removeReadFD(fd); // should no longer awake ourselves when there is data to read |
879b3f70 | 817 | |
09e6702a BH |
818 | DNSComboWriter* dc=0; |
819 | try { | |
cd989c87 | 820 | dc=new DNSComboWriter(conn->data, conn->qlen, g_now); |
09e6702a BH |
821 | } |
822 | catch(MOADNSException &mde) { | |
4957a608 BH |
823 | g_stats.clientParseError++; |
824 | if(g_logCommonErrors) | |
cd989c87 | 825 | L<<Logger::Error<<"Unable to parse packet from TCP client "<< conn->d_remote.toString() <<endl; |
4957a608 | 826 | return; |
09e6702a | 827 | } |
cd989c87 BH |
828 | dc->d_tcpConnection = conn; // carry the torch |
829 | dc->setSocket(conn->getFD()); // this is the only time a copy is made of the actual fd | |
09e6702a | 830 | dc->d_tcp=true; |
cd989c87 | 831 | dc->setRemote(&conn->d_remote); |
879b3f70 | 832 | if(dc->d_mdp.d_header.qr) { |
4957a608 BH |
833 | delete dc; |
834 | L<<Logger::Error<<"Ignoring answer on server socket!"<<endl; | |
4957a608 | 835 | return; |
879b3f70 | 836 | } |
3abcdab2 PD |
837 | if(dc->d_mdp.d_header.opcode) { |
838 | delete dc; | |
839 | L<<Logger::Error<<"Ignoring non-query opcode on server socket!"<<endl; | |
840 | return; | |
841 | } | |
09e6702a | 842 | else { |
4957a608 BH |
843 | ++g_stats.qcounter; |
844 | ++g_stats.tcpqcounter; | |
50a5ef72 | 845 | MT->makeThread(startDoResolve, dc); // deletes dc, will set state to BYTE0 again |
4957a608 | 846 | return; |
09e6702a BH |
847 | } |
848 | } | |
849 | } | |
850 | } | |
851 | ||
6dcd28c3 | 852 | //! Handle new incoming TCP connection |
d8f6d49f | 853 | void handleNewTCPQuestion(int fd, FDMultiplexer::funcparam_t& ) |
09e6702a | 854 | { |
37d3f960 | 855 | ComboAddress addr; |
09e6702a | 856 | socklen_t addrlen=sizeof(addr); |
705f31ae | 857 | int newsock=(int)accept(fd, (struct sockaddr*)&addr, &addrlen); |
09e6702a | 858 | if(newsock>0) { |
85c32340 BH |
859 | if(MT->numProcesses() > g_maxMThreads) { |
860 | g_stats.overCapacityDrops++; | |
861 | Utility::closesocket(newsock); | |
862 | return; | |
863 | } | |
864 | ||
b3b5459d | 865 | t_remotes->addRemote(addr); |
49a699c4 | 866 | if(t_allowFrom && !t_allowFrom->match(&addr)) { |
2914b022 | 867 | if(!g_quiet) |
4957a608 | 868 | L<<Logger::Error<<"["<<MT->getTid()<<"] dropping TCP query from "<<addr.toString()<<", address not matched by allow-from"<<endl; |
2914b022 | 869 | |
09e6702a | 870 | g_stats.unauthorizedTCP++; |
705f31ae | 871 | Utility::closesocket(newsock); |
09e6702a BH |
872 | return; |
873 | } | |
bd0289fc | 874 | if(g_maxTCPPerClient && t_tcpClientCounts->count(addr) && (*t_tcpClientCounts)[addr] >= g_maxTCPPerClient) { |
09e6702a | 875 | g_stats.tcpClientOverflow++; |
705f31ae | 876 | Utility::closesocket(newsock); // don't call TCPConnection::closeAndCleanup here - did not enter it in the counts yet! |
09e6702a BH |
877 | return; |
878 | } | |
cd989c87 | 879 | |
09e6702a | 880 | Utility::setNonBlocking(newsock); |
cd989c87 BH |
881 | shared_ptr<TCPConnection> tc(new TCPConnection(newsock, addr)); |
882 | tc->state=TCPConnection::BYTE0; | |
883 | ||
884 | t_fdm->addReadFD(tc->getFD(), handleRunningTCPQuestion, tc); | |
c038218b | 885 | |
0bff046b | 886 | struct timeval now; |
c038218b | 887 | Utility::gettimeofday(&now, 0); |
cd989c87 | 888 | t_fdm->setReadTTD(tc->getFD(), now, g_tcpTimeout); |
09e6702a BH |
889 | } |
890 | } | |
2914b022 | 891 | |
1bc3c142 BH |
892 | string* doProcessUDPQuestion(const std::string& question, const ComboAddress& fromaddr, int fd) |
893 | { | |
894 | ++g_stats.qcounter; | |
d7f10541 BH |
895 | if(fromaddr.sin4.sin_family==AF_INET6) |
896 | g_stats.ipv6qcounter++; | |
1bc3c142 BH |
897 | |
898 | string response; | |
899 | try { | |
900 | uint32_t age; | |
901 | if(!SyncRes::s_nopacketcache && t_packetCache->getResponsePacket(question, g_now.tv_sec, &response, &age)) { | |
902 | if(!g_quiet) | |
232f0877 | 903 | L<<Logger::Error<<t_id<< " question answered from packet cache from "<<fromaddr.toString()<<endl; |
0a6b1027 | 904 | |
1bc3c142 BH |
905 | g_stats.packetCacheHits++; |
906 | SyncRes::s_queries++; | |
907 | ageDNSPacket(response, age); | |
908 | sendto(fd, response.c_str(), response.length(), 0, (struct sockaddr*) &fromaddr, fromaddr.getSocklen()); | |
97bee66d BH |
909 | if(response.length() >= sizeof(struct dnsheader)) { |
910 | struct dnsheader dh; | |
911 | memcpy(&dh, response.c_str(), sizeof(dh)); | |
912 | updateRcodeStats(dh.rcode); | |
913 | } | |
08f3f638 | 914 | g_stats.avgLatencyUsec=(1-1.0/g_latencyStatSize)*g_stats.avgLatencyUsec + 0.0; // we assume 0 usec |
1bc3c142 BH |
915 | return 0; |
916 | } | |
917 | } | |
918 | catch(std::exception& e) { | |
919 | L<<Logger::Error<<"Error processing or aging answer packet: "<<e.what()<<endl; | |
920 | return 0; | |
921 | } | |
922 | ||
1bc3c142 BH |
923 | if(MT->numProcesses() > g_maxMThreads) { |
924 | g_stats.overCapacityDrops++; | |
925 | return 0; | |
926 | } | |
927 | ||
928 | DNSComboWriter* dc = new DNSComboWriter(question.c_str(), question.size(), g_now); | |
929 | dc->setSocket(fd); | |
930 | dc->setRemote(&fromaddr); | |
931 | ||
932 | dc->d_tcp=false; | |
933 | MT->makeThread(startDoResolve, (void*) dc); // deletes dc | |
934 | return 0; | |
935 | } | |
936 | ||
d8f6d49f | 937 | void handleNewUDPQuestion(int fd, FDMultiplexer::funcparam_t& var) |
5db529f8 | 938 | { |
a9af3782 | 939 | int len; |
5db529f8 BH |
940 | char data[1500]; |
941 | ComboAddress fromaddr; | |
942 | socklen_t addrlen=sizeof(fromaddr); | |
85c32340 | 943 | |
a9af3782 | 944 | if((len=recvfrom(fd, data, sizeof(data), 0, (sockaddr *)&fromaddr, &addrlen)) >= 0) { |
b3b5459d | 945 | t_remotes->addRemote(fromaddr); |
b23b8614 | 946 | |
49a699c4 | 947 | if(t_allowFrom && !t_allowFrom->match(&fromaddr)) { |
2914b022 | 948 | if(!g_quiet) |
4957a608 | 949 | L<<Logger::Error<<"["<<MT->getTid()<<"] dropping UDP query from "<<fromaddr.toString()<<", address not matched by allow-from"<<endl; |
2914b022 | 950 | |
5db529f8 | 951 | g_stats.unauthorizedUDP++; |
a9af3782 | 952 | return; |
5db529f8 | 953 | } |
15c01deb | 954 | BOOST_STATIC_ASSERT(offsetof(sockaddr_in, sin_port) == offsetof(sockaddr_in6, sin6_port)); |
81859ba5 | 955 | if(!fromaddr.sin4.sin_port) { // also works for IPv6 |
956 | if(!g_quiet) | |
957 | L<<Logger::Error<<"["<<MT->getTid()<<"] dropping UDP query from "<<fromaddr.toStringWithPort()<<", can't deal with port 0"<<endl; | |
958 | ||
959 | g_stats.clientParseError++; // not quite the best place to put it, but needs to go somewhere | |
960 | return; | |
961 | } | |
5db529f8 | 962 | try { |
b23b8614 | 963 | dnsheader* dh=(dnsheader*)data; |
5db529f8 | 964 | |
b23b8614 | 965 | if(dh->qr) { |
4957a608 BH |
966 | if(g_logCommonErrors) |
967 | L<<Logger::Error<<"Ignoring answer from "<<fromaddr.toString()<<" on server socket!"<<endl; | |
5db529f8 | 968 | } |
3abcdab2 PD |
969 | else if(dh->opcode) { |
970 | if(g_logCommonErrors) | |
971 | L<<Logger::Error<<"Ignoring non-query opcode "<<dh->opcode<<" from "<<fromaddr.toString()<<" on server socket!"<<endl; | |
972 | } | |
5db529f8 | 973 | else { |
232f0877 CH |
974 | string question(data, len); |
975 | if(g_weDistributeQueries) | |
06ea9015 | 976 | distributeAsyncFunction(question, boost::bind(doProcessUDPQuestion, question, fromaddr, fd)); |
232f0877 CH |
977 | else |
978 | doProcessUDPQuestion(question, fromaddr, fd); | |
5db529f8 BH |
979 | } |
980 | } | |
981 | catch(MOADNSException& mde) { | |
982 | g_stats.clientParseError++; | |
84e66a59 | 983 | if(g_logCommonErrors) |
4957a608 | 984 | L<<Logger::Error<<"Unable to parse packet from remote UDP client "<<fromaddr.toString() <<": "<<mde.what()<<endl; |
5db529f8 BH |
985 | } |
986 | } | |
ac0e821b BH |
987 | else { |
988 | // cerr<<t_id<<" had error: "<<stringerror()<<endl; | |
9326cae1 BH |
989 | if(errno == EAGAIN) |
990 | g_stats.noPacketError++; | |
ac0e821b | 991 | } |
5db529f8 BH |
992 | } |
993 | ||
1bc3c142 | 994 | |
5db529f8 BH |
995 | typedef vector<pair<int, function< void(int, any&) > > > deferredAdd_t; |
996 | deferredAdd_t deferredAdd; | |
997 | ||
f28307ad | 998 | void makeTCPServerSockets() |
9c495589 | 999 | { |
37d3f960 | 1000 | int fd; |
f28307ad | 1001 | vector<string>locals; |
2e3d8a19 | 1002 | stringtok(locals,::arg()["local-address"]," ,"); |
9c495589 | 1003 | |
f28307ad | 1004 | if(locals.empty()) |
3f81d239 | 1005 | throw PDNSException("No local address specified"); |
f28307ad | 1006 | |
f28307ad | 1007 | for(vector<string>::const_iterator i=locals.begin();i!=locals.end();++i) { |
32252594 BH |
1008 | ServiceTuple st; |
1009 | st.port=::arg().asNum("local-port"); | |
1010 | parseService(*i, st); | |
1011 | ||
1012 | ComboAddress sin; | |
1013 | ||
f28307ad | 1014 | memset((char *)&sin,0, sizeof(sin)); |
37d3f960 | 1015 | sin.sin4.sin_family = AF_INET; |
32252594 | 1016 | if(!IpToU32(st.host, (uint32_t*)&sin.sin4.sin_addr.s_addr)) { |
37d3f960 | 1017 | sin.sin6.sin6_family = AF_INET6; |
f71bc087 | 1018 | if(makeIPv6sockaddr(st.host, &sin.sin6) < 0) |
3f81d239 | 1019 | throw PDNSException("Unable to resolve local address for TCP server on '"+ st.host +"'"); |
37d3f960 BH |
1020 | } |
1021 | ||
1022 | fd=socket(sin.sin6.sin6_family, SOCK_STREAM, 0); | |
42c235e5 PD |
1023 | Utility::setCloseOnExec(fd); |
1024 | ||
37d3f960 | 1025 | if(fd<0) |
3f81d239 | 1026 | throw PDNSException("Making a TCP server socket for resolver: "+stringerror()); |
f28307ad BH |
1027 | |
1028 | int tmp=1; | |
37d3f960 | 1029 | if(setsockopt(fd,SOL_SOCKET,SO_REUSEADDR,(char*)&tmp,sizeof tmp)<0) { |
f28307ad | 1030 | L<<Logger::Error<<"Setsockopt failed for TCP listening socket"<<endl; |
c8ddb7c2 | 1031 | exit(1); |
f28307ad BH |
1032 | } |
1033 | ||
c8ddb7c2 | 1034 | #ifdef TCP_DEFER_ACCEPT |
37d3f960 BH |
1035 | if(setsockopt(fd, SOL_TCP,TCP_DEFER_ACCEPT,(char*)&tmp,sizeof tmp) >= 0) { |
1036 | if(i==locals.begin()) | |
4957a608 | 1037 | L<<Logger::Error<<"Enabled TCP data-ready filter for (slight) DoS protection"<<endl; |
c8ddb7c2 BH |
1038 | } |
1039 | #endif | |
1040 | ||
32252594 | 1041 | sin.sin4.sin_port = htons(st.port); |
37d3f960 BH |
1042 | int socklen=sin.sin4.sin_family==AF_INET ? sizeof(sin.sin4) : sizeof(sin.sin6); |
1043 | if (::bind(fd, (struct sockaddr *)&sin, socklen )<0) | |
3f81d239 | 1044 | throw PDNSException("Binding TCP server socket for "+ st.host +": "+stringerror()); |
f28307ad | 1045 | |
37d3f960 | 1046 | Utility::setNonBlocking(fd); |
49a699c4 | 1047 | setSocketSendBuffer(fd, 65000); |
37d3f960 | 1048 | listen(fd, 128); |
5db529f8 | 1049 | deferredAdd.push_back(make_pair(fd, handleNewTCPQuestion)); |
c2136bf0 | 1050 | g_tcpListenSockets.push_back(fd); |
84433b79 | 1051 | // we don't need to update g_listenSocketsAddresses since it doesn't work for TCP/IP: |
1052 | // - fd is not that which we know here, but returned from accept() | |
aa136564 | 1053 | if(sin.sin4.sin_family == AF_INET) |
32252594 | 1054 | L<<Logger::Error<<"Listening for TCP queries on "<< sin.toString() <<":"<<st.port<<endl; |
aa136564 | 1055 | else |
32252594 | 1056 | L<<Logger::Error<<"Listening for TCP queries on ["<< sin.toString() <<"]:"<<st.port<<endl; |
f28307ad | 1057 | } |
9c495589 BH |
1058 | } |
1059 | ||
f28307ad | 1060 | void makeUDPServerSockets() |
288f4aa9 | 1061 | { |
f28307ad | 1062 | vector<string>locals; |
2e3d8a19 | 1063 | stringtok(locals,::arg()["local-address"]," ,"); |
288f4aa9 | 1064 | |
f28307ad | 1065 | if(locals.empty()) |
3f81d239 | 1066 | throw PDNSException("No local address specified"); |
f28307ad | 1067 | |
2e3d8a19 | 1068 | if(::arg()["local-address"]=="0.0.0.0") { |
c836dc19 | 1069 | L<<Logger::Warning<<"It is advised to bind to explicit addresses with the --local-address option"<<endl; |
288f4aa9 | 1070 | } |
525b8a7c | 1071 | |
f28307ad | 1072 | for(vector<string>::const_iterator i=locals.begin();i!=locals.end();++i) { |
32252594 BH |
1073 | ServiceTuple st; |
1074 | st.port=::arg().asNum("local-port"); | |
1075 | parseService(*i, st); | |
1076 | ||
37d3f960 | 1077 | ComboAddress sin; |
996c89cc | 1078 | |
37d3f960 BH |
1079 | memset(&sin, 0, sizeof(sin)); |
1080 | sin.sin4.sin_family = AF_INET; | |
32252594 | 1081 | if(!IpToU32(st.host.c_str() , (uint32_t*)&sin.sin4.sin_addr.s_addr)) { |
37d3f960 | 1082 | sin.sin6.sin6_family = AF_INET6; |
f71bc087 | 1083 | if(makeIPv6sockaddr(st.host, &sin.sin6) < 0) |
3f81d239 | 1084 | throw PDNSException("Unable to resolve local address for UDP server on '"+ st.host +"'"); |
37d3f960 BH |
1085 | } |
1086 | ||
bb4bdbaf | 1087 | int fd=socket(sin.sin4.sin_family, SOCK_DGRAM, 0); |
42c235e5 | 1088 | Utility::setCloseOnExec(fd); |
bb4bdbaf | 1089 | |
d3b4137e | 1090 | if(fd < 0) { |
3f81d239 | 1091 | throw PDNSException("Making a UDP server socket for resolver: "+netstringerror()); |
d3b4137e | 1092 | } |
37d3f960 | 1093 | |
4e9a20e6 | 1094 | setSocketReceiveBuffer(fd, 250000); |
32252594 | 1095 | sin.sin4.sin_port = htons(st.port); |
37d3f960 BH |
1096 | |
1097 | int socklen=sin.sin4.sin_family==AF_INET ? sizeof(sin.sin4) : sizeof(sin.sin6); | |
1098 | if (::bind(fd, (struct sockaddr *)&sin, socklen)<0) | |
3f81d239 | 1099 | throw PDNSException("Resolver binding to server socket on port "+ lexical_cast<string>(st.port) +" for "+ st.host+": "+stringerror()); |
f28307ad BH |
1100 | |
1101 | Utility::setNonBlocking(fd); | |
c2136bf0 | 1102 | |
0aaecd50 | 1103 | deferredAdd.push_back(make_pair(fd, handleNewUDPQuestion)); |
40a3dd64 | 1104 | g_listenSocketsAddresses[fd]=sin; // this is written to only from the startup thread, not from the workers |
aa136564 | 1105 | if(sin.sin4.sin_family == AF_INET) |
32252594 | 1106 | L<<Logger::Error<<"Listening for UDP queries on "<< sin.toString() <<":"<<st.port<<endl; |
aa136564 | 1107 | else |
32252594 | 1108 | L<<Logger::Error<<"Listening for UDP queries on ["<< sin.toString() <<"]:"<<st.port<<endl; |
f28307ad | 1109 | } |
c836dc19 | 1110 | } |
caa6eefa | 1111 | |
9c495589 | 1112 | |
c836dc19 BH |
1113 | void daemonize(void) |
1114 | { | |
1115 | if(fork()) | |
1116 | exit(0); // bye bye | |
1117 | ||
1118 | setsid(); | |
1119 | ||
27a5ead5 BH |
1120 | int i=open("/dev/null",O_RDWR); /* open stdin */ |
1121 | if(i < 0) | |
1122 | L<<Logger::Critical<<"Unable to open /dev/null: "<<stringerror()<<endl; | |
1123 | else { | |
1124 | dup2(i,0); /* stdin */ | |
1125 | dup2(i,1); /* stderr */ | |
1126 | dup2(i,2); /* stderr */ | |
1127 | close(i); | |
1128 | } | |
288f4aa9 | 1129 | } |
caa6eefa | 1130 | |
aaacf7f2 | 1131 | uint64_t counter; |
c75a6a9e BH |
1132 | bool statsWanted; |
1133 | ||
1134 | void usr1Handler(int) | |
1135 | { | |
1136 | statsWanted=true; | |
1137 | } | |
ae1b2e98 | 1138 | |
9170fbaf BH |
1139 | void usr2Handler(int) |
1140 | { | |
f1f34cc2 | 1141 | g_quiet= !g_quiet; |
1142 | SyncRes::setDefaultLogMode(g_quiet ? SyncRes::LogNone : SyncRes::Log); | |
1143 | ::arg().set("quiet")=g_quiet ? "" : "no"; | |
9170fbaf BH |
1144 | } |
1145 | ||
c75a6a9e BH |
1146 | void doStats(void) |
1147 | { | |
16beeaa4 BH |
1148 | static time_t lastOutputTime; |
1149 | static uint64_t lastQueryCount; | |
d299d4f5 | 1150 | |
1151 | uint64_t cacheHits = broadcastAccFunction<uint64_t>(pleaseGetCacheHits); | |
1152 | uint64_t cacheMisses = broadcastAccFunction<uint64_t>(pleaseGetCacheMisses); | |
16beeaa4 | 1153 | |
d299d4f5 | 1154 | if(g_stats.qcounter && (cacheHits + cacheMisses) && SyncRes::s_queries && SyncRes::s_outqueries) { |
3427fa8a BH |
1155 | L<<Logger::Warning<<"stats: "<<g_stats.qcounter<<" questions, "<< |
1156 | broadcastAccFunction<uint64_t>(pleaseGetCacheSize)<< " cache entries, "<< | |
1157 | broadcastAccFunction<uint64_t>(pleaseGetNegCacheSize)<<" negative entries, "<< | |
1158 | (int)((cacheHits*100.0)/(cacheHits+cacheMisses))<<"% cache hits"<<endl; | |
1159 | ||
1160 | L<<Logger::Warning<<"stats: throttle map: " | |
1161 | << broadcastAccFunction<uint64_t>(pleaseGetThrottleSize) <<", ns speeds: " | |
1162 | << broadcastAccFunction<uint64_t>(pleaseGetNsSpeedsSize)<<endl; | |
70c2c8b1 BH |
1163 | L<<Logger::Warning<<"stats: outpacket/query ratio "<<(int)(SyncRes::s_outqueries*100.0/SyncRes::s_queries)<<"%"; |
1164 | L<<Logger::Warning<<", "<<(int)(SyncRes::s_throttledqueries*100.0/(SyncRes::s_outqueries+SyncRes::s_throttledqueries))<<"% throttled, " | |
525b8a7c | 1165 | <<SyncRes::s_nodelegated<<" no-delegation drops"<<endl; |
3427fa8a BH |
1166 | L<<Logger::Warning<<"stats: "<<SyncRes::s_tcpoutqueries<<" outgoing tcp connections, "<< |
1167 | broadcastAccFunction<uint64_t>(pleaseGetConcurrentQueries)<<" queries running, "<<SyncRes::s_outgoingtimeouts<<" outgoing timeouts"<<endl; | |
81883dcc | 1168 | |
16beeaa4 BH |
1169 | //L<<Logger::Warning<<"stats: "<<g_stats.ednsPingMatches<<" ping matches, "<<g_stats.ednsPingMismatches<<" mismatches, "<< |
1170 | //g_stats.noPingOutQueries<<" outqueries w/o ping, "<< g_stats.noEdnsOutQueries<<" w/o EDNS"<<endl; | |
1171 | ||
1172 | L<<Logger::Warning<<"stats: " << broadcastAccFunction<uint64_t>(pleaseGetPacketCacheSize) << | |
1173 | " packet cache entries, "<<(int)(100.0*broadcastAccFunction<uint64_t>(pleaseGetPacketCacheHits)/SyncRes::s_queries) << "% packet cache hits"<<endl; | |
1174 | ||
1175 | time_t now = time(0); | |
1176 | if(lastOutputTime && lastQueryCount && now != lastOutputTime) { | |
1177 | L<<Logger::Warning<<"stats: "<< (SyncRes::s_queries - lastQueryCount) / (now - lastOutputTime) <<" qps (average over "<< (now - lastOutputTime) << " seconds)"<<endl; | |
1178 | } | |
1179 | lastOutputTime = now; | |
1180 | lastQueryCount = SyncRes::s_queries; | |
c75a6a9e | 1181 | } |
7becf07f | 1182 | else if(statsWanted) |
70c2c8b1 | 1183 | L<<Logger::Warning<<"stats: no stats yet!"<<endl; |
7becf07f | 1184 | |
c75a6a9e BH |
1185 | statsWanted=false; |
1186 | } | |
c836dc19 | 1187 | |
29f0b1ce | 1188 | static void houseKeeping(void *) |
779828c4 | 1189 | try |
c836dc19 | 1190 | { |
d67620e4 | 1191 | static __thread time_t last_stat, last_rootupdate, last_prune, last_secpoll; |
8baca3fa | 1192 | static __thread int cleanCounter=0; |
c9e9e5e0 | 1193 | struct timeval now; |
c038218b | 1194 | Utility::gettimeofday(&now, 0); |
c9e9e5e0 | 1195 | |
1a16adf0 | 1196 | // clog<<"* "<<t_id<<" "<<(void*)&last_stat<<"\t"<<(unsigned int)last_stat<<endl; |
ac0e821b | 1197 | |
c3828c03 | 1198 | if(now.tv_sec - last_prune > (time_t)(5 + t_id)) { |
5e4a2466 BH |
1199 | DTime dt; |
1200 | dt.setTimeval(now); | |
49a699c4 | 1201 | t_RC->doPrune(); // this function is local to a thread, so fine anyhow |
c3828c03 | 1202 | t_packetCache->doPruneTo(::arg().asNum("max-packetcache-entries") / g_numThreads); |
33988bfb | 1203 | |
1a16adf0 | 1204 | pruneCollection(t_sstorage->negcache, ::arg().asNum("max-cache-entries") / (g_numThreads * 10), 200); |
8baca3fa BH |
1205 | |
1206 | if(!((cleanCounter++)%40)) { // this is a full scan! | |
1207 | time_t limit=now.tv_sec-300; | |
ac0e821b | 1208 | for(SyncRes::nsspeeds_t::iterator i = t_sstorage->nsSpeeds.begin() ; i!= t_sstorage->nsSpeeds.end(); ) |
8baca3fa | 1209 | if(i->second.stale(limit)) |
ac0e821b | 1210 | t_sstorage->nsSpeeds.erase(i++); |
8baca3fa BH |
1211 | else |
1212 | ++i; | |
1213 | } | |
7393d6c0 | 1214 | // L<<Logger::Warning<<"Spent "<<dt.udiff()/1000<<" msec cleaning"<<endl; |
ae1b2e98 BH |
1215 | last_prune=time(0); |
1216 | } | |
ac0e821b | 1217 | |
c038218b | 1218 | if(now.tv_sec - last_rootupdate > 7200) { |
c9e9e5e0 | 1219 | SyncRes sr(now); |
2188dcc3 | 1220 | sr.setDoEDNS0(true); |
ea634573 | 1221 | vector<DNSResourceRecord> ret; |
c836dc19 BH |
1222 | |
1223 | sr.setNoCache(); | |
a9af3782 | 1224 | int res=sr.beginResolve(".", QType(QType::NS), 1, ret); |
c836dc19 | 1225 | if(!res) { |
70c2c8b1 | 1226 | L<<Logger::Warning<<"Refreshed . records"<<endl; |
c9e9e5e0 | 1227 | last_rootupdate=now.tv_sec; |
c836dc19 BH |
1228 | } |
1229 | else | |
1230 | L<<Logger::Error<<"Failed to update . records, RCODE="<<res<<endl; | |
1231 | } | |
d67620e4 | 1232 | |
1233 | if(!t_id) { | |
1234 | if(now.tv_sec - last_stat >= 1800) { | |
1235 | doStats(); | |
1236 | last_stat=time(0); | |
1237 | } | |
1238 | ||
c0a074d7 | 1239 | if(now.tv_sec - last_secpoll >= 3600) { |
d67620e4 | 1240 | doSecPoll(&last_secpoll); |
1241 | } | |
1242 | } | |
c836dc19 | 1243 | } |
3f81d239 | 1244 | catch(PDNSException& ae) |
779828c4 | 1245 | { |
c0a074d7 | 1246 | L<<Logger::Error<<"Fatal error in housekeeping thread: "<<ae.reason<<endl; |
779828c4 BH |
1247 | throw; |
1248 | } | |
d6d5dea7 | 1249 | |
49a699c4 BH |
1250 | void makeThreadPipes() |
1251 | { | |
c3828c03 | 1252 | for(unsigned int n=0; n < g_numThreads; ++n) { |
49a699c4 BH |
1253 | struct ThreadPipeSet tps; |
1254 | int fd[2]; | |
1255 | if(pipe(fd) < 0) | |
1256 | unixDie("Creating pipe for inter-thread communications"); | |
1257 | ||
1258 | tps.readToThread = fd[0]; | |
1259 | tps.writeToThread = fd[1]; | |
1260 | ||
1261 | if(pipe(fd) < 0) | |
1262 | unixDie("Creating pipe for inter-thread communications"); | |
1263 | tps.readFromThread = fd[0]; | |
1264 | tps.writeFromThread = fd[1]; | |
1265 | ||
1266 | g_pipes.push_back(tps); | |
1267 | } | |
1268 | } | |
1269 | ||
00c9b8c1 BH |
1270 | struct ThreadMSG |
1271 | { | |
1272 | pipefunc_t func; | |
1273 | bool wantAnswer; | |
1274 | }; | |
1275 | ||
49a699c4 BH |
1276 | void broadcastFunction(const pipefunc_t& func, bool skipSelf) |
1277 | { | |
49a699c4 BH |
1278 | unsigned int n = 0; |
1279 | BOOST_FOREACH(ThreadPipeSet& tps, g_pipes) | |
1280 | { | |
1281 | if(n++ == t_id) { | |
1282 | if(!skipSelf) | |
1283 | func(); // don't write to ourselves! | |
1284 | continue; | |
1285 | } | |
00c9b8c1 BH |
1286 | |
1287 | ThreadMSG* tmsg = new ThreadMSG(); | |
1288 | tmsg->func = func; | |
1289 | tmsg->wantAnswer = true; | |
1290 | if(write(tps.writeToThread, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) | |
49a699c4 BH |
1291 | unixDie("write to thread pipe returned wrong size or error"); |
1292 | ||
1293 | string* resp; | |
1294 | if(read(tps.readFromThread, &resp, sizeof(resp)) != sizeof(resp)) | |
1295 | unixDie("read from thread pipe returned wrong size or error"); | |
1296 | ||
1297 | if(resp) { | |
1298 | // cerr <<"got response: " << *resp << endl; | |
1299 | delete resp; | |
1300 | } | |
1301 | } | |
1302 | } | |
06ea9015 | 1303 | |
1304 | uint32_t g_disthashseed; | |
1305 | void distributeAsyncFunction(const std::string& question, const pipefunc_t& func) | |
00c9b8c1 | 1306 | { |
06ea9015 | 1307 | unsigned int hash = hashQuestion(question.c_str(), question.length(), g_disthashseed); |
1308 | unsigned int target = 1 + (hash % (g_pipes.size()-1)); | |
1309 | ||
00c9b8c1 BH |
1310 | if(target == t_id) { |
1311 | func(); | |
1312 | return; | |
1313 | } | |
1314 | ThreadPipeSet& tps = g_pipes[target]; | |
1315 | ThreadMSG* tmsg = new ThreadMSG(); | |
1316 | tmsg->func = func; | |
1317 | tmsg->wantAnswer = false; | |
1318 | ||
1319 | if(write(tps.writeToThread, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) | |
06ea9015 | 1320 | unixDie("write to thread pipe returned wrong size or error"); |
00c9b8c1 | 1321 | } |
3427fa8a | 1322 | |
49a699c4 BH |
1323 | void handlePipeRequest(int fd, FDMultiplexer::funcparam_t& var) |
1324 | { | |
00c9b8c1 BH |
1325 | ThreadMSG* tmsg; |
1326 | ||
1327 | if(read(fd, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) { // fd == readToThread | |
49a699c4 BH |
1328 | unixDie("read from thread pipe returned wrong size or error"); |
1329 | } | |
3427fa8a | 1330 | |
2f22827a | 1331 | void *resp=0; |
1332 | try { | |
1333 | resp = tmsg->func(); | |
1334 | } | |
1335 | catch(std::exception& e) { | |
1336 | L<<Logger::Error<<"PIPE function we executed created exception: "<<e.what()<<endl; // but what if they wanted an answer.. we send 0 | |
1337 | } | |
1338 | catch(PDNSException& e) { | |
1339 | L<<Logger::Error<<"PIPE function we executed created PDNS exception: "<<e.reason<<endl; // but what if they wanted an answer.. we send 0 | |
1340 | } | |
00c9b8c1 BH |
1341 | if(tmsg->wantAnswer) |
1342 | if(write(g_pipes[t_id].writeFromThread, &resp, sizeof(resp)) != sizeof(resp)) | |
1343 | unixDie("write to thread pipe returned wrong size or error"); | |
3427fa8a | 1344 | |
00c9b8c1 | 1345 | delete tmsg; |
49a699c4 | 1346 | } |
09e6702a | 1347 | |
13034931 BH |
1348 | template<class T> void *voider(const boost::function<T*()>& func) |
1349 | { | |
1350 | return func(); | |
1351 | } | |
1352 | ||
b3b5459d BH |
1353 | vector<ComboAddress>& operator+=(vector<ComboAddress>&a, const vector<ComboAddress>& b) |
1354 | { | |
1355 | a.insert(a.end(), b.begin(), b.end()); | |
1356 | return a; | |
1357 | } | |
1358 | ||
13034931 | 1359 | template<class T> T broadcastAccFunction(const boost::function<T*()>& func, bool skipSelf) |
3427fa8a BH |
1360 | { |
1361 | unsigned int n = 0; | |
1362 | T ret=T(); | |
1363 | BOOST_FOREACH(ThreadPipeSet& tps, g_pipes) | |
1364 | { | |
1365 | if(n++ == t_id) { | |
1366 | if(!skipSelf) { | |
1367 | T* resp = (T*)func(); // don't write to ourselves! | |
1368 | if(resp) { | |
1369 | //~ cerr <<"got direct: " << *resp << endl; | |
1370 | ret += *resp; | |
1371 | delete resp; | |
1372 | } | |
1373 | } | |
1374 | continue; | |
1375 | } | |
1376 | ||
00c9b8c1 BH |
1377 | ThreadMSG* tmsg = new ThreadMSG(); |
1378 | tmsg->func = boost::bind(voider<T>, func); | |
1379 | tmsg->wantAnswer = true; | |
1380 | ||
1381 | if(write(tps.writeToThread, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) | |
3427fa8a | 1382 | unixDie("write to thread pipe returned wrong size or error"); |
00c9b8c1 | 1383 | |
3427fa8a BH |
1384 | |
1385 | T* resp; | |
1386 | if(read(tps.readFromThread, &resp, sizeof(resp)) != sizeof(resp)) | |
1387 | unixDie("read from thread pipe returned wrong size or error"); | |
1388 | ||
1389 | if(resp) { | |
1390 | //~ cerr <<"got response: " << *resp << endl; | |
1391 | ret += *resp; | |
1392 | delete resp; | |
1393 | } | |
1394 | } | |
1395 | return ret; | |
1396 | } | |
1397 | ||
13034931 BH |
1398 | template string broadcastAccFunction(const boost::function<string*()>& fun, bool skipSelf); // explicit instantiation |
1399 | template uint64_t broadcastAccFunction(const boost::function<uint64_t*()>& fun, bool skipSelf); // explicit instantiation | |
b3b5459d | 1400 | template vector<ComboAddress> broadcastAccFunction(const boost::function<vector<ComboAddress> *()>& fun, bool skipSelf); // explicit instantiation |
3427fa8a | 1401 | |
d8f6d49f | 1402 | void handleRCC(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a BH |
1403 | { |
1404 | string remote; | |
1405 | string msg=s_rcc.recv(&remote); | |
1406 | RecursorControlParser rcp; | |
1407 | RecursorControlParser::func_t* command; | |
77499b05 | 1408 | |
09e6702a | 1409 | string answer=rcp.getAnswer(msg, &command); |
ab5c053d BH |
1410 | try { |
1411 | s_rcc.send(answer, &remote); | |
1412 | command(); | |
1413 | } | |
fdbf35ac | 1414 | catch(std::exception& e) { |
ab5c053d BH |
1415 | L<<Logger::Error<<"Error dealing with control socket request: "<<e.what()<<endl; |
1416 | } | |
3f81d239 | 1417 | catch(PDNSException& ae) { |
ab5c053d BH |
1418 | L<<Logger::Error<<"Error dealing with control socket request: "<<ae.reason<<endl; |
1419 | } | |
09e6702a BH |
1420 | } |
1421 | ||
d8f6d49f | 1422 | void handleTCPClientReadable(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 1423 | { |
0b18b22e | 1424 | PacketID* pident=any_cast<PacketID>(&var); |
667f7e60 | 1425 | // cerr<<"handleTCPClientReadable called for fd "<<fd<<", pident->inNeeded: "<<pident->inNeeded<<", "<<pident->sock->getHandle()<<endl; |
09e6702a | 1426 | |
667f7e60 | 1427 | shared_array<char> buffer(new char[pident->inNeeded]); |
09e6702a | 1428 | |
705f31ae | 1429 | int ret=recv(fd, buffer.get(), pident->inNeeded,0); |
09e6702a | 1430 | if(ret > 0) { |
667f7e60 BH |
1431 | pident->inMSG.append(&buffer[0], &buffer[ret]); |
1432 | pident->inNeeded-=ret; | |
825fa717 | 1433 | if(!pident->inNeeded || pident->inIncompleteOkay) { |
667f7e60 BH |
1434 | // cerr<<"Got entire load of "<<pident->inMSG.size()<<" bytes"<<endl; |
1435 | PacketID pid=*pident; | |
1436 | string msg=pident->inMSG; | |
09e6702a | 1437 | |
bb4bdbaf | 1438 | t_fdm->removeReadFD(fd); |
09e6702a BH |
1439 | MT->sendEvent(pid, &msg); |
1440 | } | |
1441 | else { | |
667f7e60 | 1442 | // cerr<<"Still have "<<pident->inNeeded<<" left to go"<<endl; |
09e6702a BH |
1443 | } |
1444 | } | |
1445 | else { | |
667f7e60 | 1446 | PacketID tmp=*pident; |
bb4bdbaf | 1447 | t_fdm->removeReadFD(fd); // pident might now be invalid (it isn't, but still) |
09e6702a BH |
1448 | string empty; |
1449 | MT->sendEvent(tmp, &empty); // this conveys error status | |
1450 | } | |
1451 | } | |
1452 | ||
d8f6d49f | 1453 | void handleTCPClientWritable(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 1454 | { |
0b18b22e | 1455 | PacketID* pid=any_cast<PacketID>(&var); |
4ca15bca | 1456 | int ret=send(fd, pid->outMSG.c_str() + pid->outPos, pid->outMSG.size() - pid->outPos,0); |
09e6702a | 1457 | if(ret > 0) { |
667f7e60 BH |
1458 | pid->outPos+=ret; |
1459 | if(pid->outPos==pid->outMSG.size()) { | |
1460 | PacketID tmp=*pid; | |
bb4bdbaf | 1461 | t_fdm->removeWriteFD(fd); |
09e6702a BH |
1462 | MT->sendEvent(tmp, &tmp.outMSG); // send back what we sent to convey everything is ok |
1463 | } | |
1464 | } | |
1465 | else { // error or EOF | |
667f7e60 | 1466 | PacketID tmp(*pid); |
bb4bdbaf | 1467 | t_fdm->removeWriteFD(fd); |
09e6702a | 1468 | string sent; |
998a4334 | 1469 | MT->sendEvent(tmp, &sent); // we convey error status by sending empty string |
09e6702a BH |
1470 | } |
1471 | } | |
1472 | ||
34801ab1 BH |
1473 | // resend event to everybody chained onto it |
1474 | void doResends(MT_t::waiters_t::iterator& iter, PacketID resend, const string& content) | |
1475 | { | |
1476 | if(iter->key.chain.empty()) | |
1477 | return; | |
e27e91a8 | 1478 | // cerr<<"doResends called!\n"; |
34801ab1 BH |
1479 | for(PacketID::chain_t::iterator i=iter->key.chain.begin(); i != iter->key.chain.end() ; ++i) { |
1480 | resend.fd=-1; | |
1481 | resend.id=*i; | |
e27e91a8 | 1482 | // cerr<<"\tResending "<<content.size()<<" bytes for fd="<<resend.fd<<" and id="<<resend.id<<endl; |
4665c31e | 1483 | |
34801ab1 BH |
1484 | MT->sendEvent(resend, &content); |
1485 | g_stats.chainResends++; | |
34801ab1 BH |
1486 | } |
1487 | } | |
1488 | ||
d8f6d49f | 1489 | void handleUDPServerResponse(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 1490 | { |
600fc20b | 1491 | PacketID pid=any_cast<PacketID>(var); |
998a4334 | 1492 | int len; |
09e6702a | 1493 | char data[1500]; |
996c89cc | 1494 | ComboAddress fromaddr; |
09e6702a BH |
1495 | socklen_t addrlen=sizeof(fromaddr); |
1496 | ||
998a4334 | 1497 | len=recvfrom(fd, data, sizeof(data), 0, (sockaddr *)&fromaddr, &addrlen); |
c1da7976 | 1498 | |
998a4334 BH |
1499 | if(len < (int)sizeof(dnsheader)) { |
1500 | if(len < 0) | |
996c89cc | 1501 | ; // cerr<<"Error on fd "<<fd<<": "<<stringerror()<<"\n"; |
09e6702a BH |
1502 | else { |
1503 | g_stats.serverParseError++; | |
1504 | if(g_logCommonErrors) | |
85db02c5 | 1505 | L<<Logger::Error<<"Unable to parse packet from remote UDP server "<< fromaddr.toString() << |
e44d9fa7 | 1506 | ": packet smaller than DNS header"<<endl; |
998a4334 | 1507 | } |
34801ab1 | 1508 | |
49a699c4 | 1509 | t_udpclientsocks->returnSocket(fd); |
34801ab1 BH |
1510 | string empty; |
1511 | ||
1512 | MT_t::waiters_t::iterator iter=MT->d_waiters.find(pid); | |
1513 | if(iter != MT->d_waiters.end()) | |
1514 | doResends(iter, pid, empty); | |
1515 | ||
1516 | MT->sendEvent(pid, &empty); // this denotes error (does lookup again.. at least L1 will be hot) | |
998a4334 BH |
1517 | return; |
1518 | } | |
1519 | ||
1520 | dnsheader dh; | |
1521 | memcpy(&dh, data, sizeof(dh)); | |
1522 | ||
6da3b3ad PD |
1523 | PacketID pident; |
1524 | pident.remote=fromaddr; | |
1525 | pident.id=dh.id; | |
1526 | pident.fd=fd; | |
34801ab1 | 1527 | |
33a928af | 1528 | if(!dh.qr && g_logCommonErrors) { |
6da3b3ad PD |
1529 | L<<Logger::Warning<<"Not taking data from question on outgoing socket from "<< fromaddr.toStringWithPort() <<endl; |
1530 | } | |
1531 | ||
1532 | if(!dh.qdcount || // UPC, Nominum, very old BIND on FormErr, NSD | |
1533 | !dh.qr) { // one weird server | |
1534 | pident.domain.clear(); | |
1535 | pident.type = 0; | |
1536 | } | |
1537 | else { | |
1538 | try { | |
1539 | pident.domain=questionExpand(data, len, pident.type); // don't copy this from above - we need to do the actual read | |
1540 | } | |
1541 | catch(std::exception& e) { | |
1542 | g_stats.serverParseError++; // won't be fed to lwres.cc, so we have to increment | |
1543 | L<<Logger::Warning<<"Error in packet from "<< fromaddr.toStringWithPort() << ": "<<e.what() << endl; | |
1544 | return; | |
34801ab1 | 1545 | } |
6da3b3ad PD |
1546 | } |
1547 | string packet; | |
1548 | packet.assign(data, len); | |
34801ab1 | 1549 | |
6da3b3ad PD |
1550 | MT_t::waiters_t::iterator iter=MT->d_waiters.find(pident); |
1551 | if(iter != MT->d_waiters.end()) { | |
1552 | doResends(iter, pident, packet); | |
1553 | } | |
c1da7976 | 1554 | |
6da3b3ad | 1555 | retryWithName: |
4957a608 | 1556 | |
6da3b3ad PD |
1557 | if(!MT->sendEvent(pident, &packet)) { |
1558 | // 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 | |
1559 | for(MT_t::waiters_t::iterator mthread=MT->d_waiters.begin(); mthread!=MT->d_waiters.end(); ++mthread) { | |
1560 | if(pident.fd==mthread->key.fd && mthread->key.remote==pident.remote && mthread->key.type == pident.type && | |
1561 | pdns_iequals(pident.domain, mthread->key.domain)) { | |
1562 | mthread->key.nearMisses++; | |
998a4334 | 1563 | } |
6da3b3ad PD |
1564 | |
1565 | // be a bit paranoid here since we're weakening our matching | |
1566 | if(pident.domain.empty() && !mthread->key.domain.empty() && !pident.type && mthread->key.type && | |
1567 | pident.id == mthread->key.id && mthread->key.remote == pident.remote) { | |
1568 | // cerr<<"Empty response, rest matches though, sending to a waiter"<<endl; | |
1569 | pident.domain = mthread->key.domain; | |
1570 | pident.type = mthread->key.type; | |
1571 | goto retryWithName; // note that this only passes on an error, lwres will still reject the packet | |
d4fb76e9 | 1572 | } |
09e6702a | 1573 | } |
6da3b3ad PD |
1574 | g_stats.unexpectedCount++; // if we made it here, it really is an unexpected answer |
1575 | if(g_logCommonErrors) { | |
1576 | L<<Logger::Warning<<"Discarding unexpected packet from "<<fromaddr.toStringWithPort()<<": "<<pident.domain<<", "<<pident.type<<", "<<MT->d_waiters.size()<<" waiters"<<endl; | |
d8f6d49f | 1577 | } |
09e6702a | 1578 | } |
6da3b3ad PD |
1579 | else if(fd >= 0) { |
1580 | t_udpclientsocks->returnSocket(fd); | |
1581 | } | |
09e6702a BH |
1582 | } |
1583 | ||
1f4abb20 BH |
1584 | FDMultiplexer* getMultiplexer() |
1585 | { | |
1586 | FDMultiplexer* ret; | |
1587 | for(FDMultiplexer::FDMultiplexermap_t::const_iterator i = FDMultiplexer::getMultiplexerMap().begin(); | |
1588 | i != FDMultiplexer::getMultiplexerMap().end(); ++i) { | |
1589 | try { | |
1590 | ret=i->second(); | |
1f4abb20 BH |
1591 | return ret; |
1592 | } | |
98d0ee4a | 1593 | catch(FDMultiplexerException &fe) { |
0a7f24cb | 1594 | L<<Logger::Error<<"Non-fatal error initializing possible multiplexer ("<<fe.what()<<"), falling back"<<endl; |
98d0ee4a BH |
1595 | } |
1596 | catch(...) { | |
1597 | L<<Logger::Error<<"Non-fatal error initializing possible multiplexer"<<endl; | |
1598 | } | |
1f4abb20 BH |
1599 | } |
1600 | L<<Logger::Error<<"No working multiplexer found!"<<endl; | |
1601 | exit(1); | |
1602 | } | |
1603 | ||
5605c067 | 1604 | |
0f39c1a3 | 1605 | string* doReloadLuaScript() |
4485aa35 | 1606 | { |
674cf0f6 | 1607 | string fname= ::arg()["lua-dns-script"]; |
4485aa35 | 1608 | try { |
674cf0f6 BH |
1609 | if(fname.empty()) { |
1610 | t_pdl->reset(); | |
1611 | L<<Logger::Error<<t_id<<" Unloaded current lua script"<<endl; | |
0f39c1a3 | 1612 | return new string("unloaded\n"); |
4485aa35 BH |
1613 | } |
1614 | else { | |
5704e107 | 1615 | *t_pdl = shared_ptr<RecursorLua>(new RecursorLua(fname)); |
4485aa35 BH |
1616 | } |
1617 | } | |
fdbf35ac | 1618 | catch(std::exception& e) { |
674cf0f6 | 1619 | L<<Logger::Error<<t_id<<" Retaining current script, error from '"<<fname<<"': "<< e.what() <<endl; |
0f39c1a3 | 1620 | return new string("retaining current script, error from '"+fname+"': "+e.what()+"\n"); |
4485aa35 | 1621 | } |
674cf0f6 BH |
1622 | |
1623 | L<<Logger::Warning<<t_id<<" (Re)loaded lua script from '"<<fname<<"'"<<endl; | |
0f39c1a3 | 1624 | return new string("(re)loaded '"+fname+"'\n"); |
4485aa35 BH |
1625 | } |
1626 | ||
49a699c4 BH |
1627 | string doQueueReloadLuaScript(vector<string>::const_iterator begin, vector<string>::const_iterator end) |
1628 | { | |
1629 | if(begin != end) | |
1630 | ::arg().set("lua-dns-script") = *begin; | |
1631 | ||
0f39c1a3 | 1632 | return broadcastAccFunction<string>(doReloadLuaScript); |
49a699c4 BH |
1633 | } |
1634 | ||
77499b05 BH |
1635 | string* pleaseUseNewTraceRegex(const std::string& newRegex) |
1636 | try | |
1637 | { | |
1638 | if(newRegex.empty()) { | |
1639 | t_traceRegex->reset(); | |
1640 | return new string("unset\n"); | |
1641 | } | |
1642 | else { | |
1643 | (*t_traceRegex) = shared_ptr<Regex>(new Regex(newRegex)); | |
1644 | return new string("ok\n"); | |
1645 | } | |
1646 | } | |
3f81d239 | 1647 | catch(PDNSException& ae) |
77499b05 BH |
1648 | { |
1649 | return new string(ae.reason+"\n"); | |
1650 | } | |
1651 | ||
1652 | string doTraceRegex(vector<string>::const_iterator begin, vector<string>::const_iterator end) | |
1653 | { | |
1654 | return broadcastAccFunction<string>(boost::bind(pleaseUseNewTraceRegex, begin!=end ? *begin : "")); | |
1655 | } | |
1656 | ||
4e9a20e6 | 1657 | static void checkLinuxIPv6Limits() |
1658 | { | |
1659 | #ifdef __linux__ | |
1660 | string line; | |
1661 | if(readFileIfThere("/proc/sys/net/ipv6/route/max_size", &line)) { | |
1662 | int lim=atoi(line.c_str()); | |
1663 | if(lim < 16384) { | |
36849ff2 | 1664 | L<<Logger::Error<<"If using IPv6, please raise sysctl net.ipv6.route.max_size, currently set to "<<lim<<" which is < 16384"<<endl; |
4e9a20e6 | 1665 | } |
1666 | } | |
1667 | #endif | |
1668 | } | |
36849ff2 | 1669 | static void checkOrFixFDS() |
4e9a20e6 | 1670 | { |
36849ff2 | 1671 | unsigned int availFDs=getFilenumLimit(); |
1672 | if(g_maxMThreads * g_numThreads > availFDs) { | |
1673 | if(getFilenumLimit(true) >= g_maxMThreads * g_numThreads) { | |
1674 | setFilenumLimit(g_maxMThreads * g_numThreads); | |
1675 | L<<Logger::Warning<<"Raised soft limit on number of filedescriptors to "<<g_maxMThreads * g_numThreads<<" to match max-mthreads and threads settings"<<endl; | |
1676 | } | |
1677 | else { | |
1678 | int newval = getFilenumLimit(true) / g_numThreads; | |
1679 | L<<Logger::Warning<<"Insufficient number of filedescriptors available for max-mthreads*threads setting! ("<<availFDs<<" < "<<g_maxMThreads*g_numThreads<<"), reducing max-mthreads to "<<newval<<endl; | |
1680 | g_maxMThreads = newval; | |
1681 | setFilenumLimit(g_maxMThreads * g_numThreads); | |
1682 | } | |
1683 | } | |
1684 | ||
4e9a20e6 | 1685 | } |
77499b05 | 1686 | |
bb4bdbaf | 1687 | void* recursorThread(void*); |
51e2144e | 1688 | |
3427fa8a | 1689 | void* pleaseSupplantACLs(NetmaskGroup *ng) |
49a699c4 BH |
1690 | { |
1691 | t_allowFrom = ng; | |
3427fa8a | 1692 | return 0; |
49a699c4 BH |
1693 | } |
1694 | ||
dbd23fc2 BH |
1695 | int g_argc; |
1696 | char** g_argv; | |
1697 | ||
18af64a8 | 1698 | void parseACLs() |
f7c1d4e3 | 1699 | { |
18af64a8 | 1700 | static bool l_initialized; |
49a699c4 BH |
1701 | |
1702 | if(l_initialized) { // only reload configuration file on second call | |
18af64a8 BH |
1703 | string configname=::arg()["config-dir"]+"/recursor.conf"; |
1704 | cleanSlashes(configname); | |
1705 | ||
1706 | if(!::arg().preParseFile(configname.c_str(), "allow-from-file")) | |
7e818521 | 1707 | throw runtime_error("Unable to re-parse configuration file '"+configname+"'"); |
49a699c4 | 1708 | ::arg().preParseFile(configname.c_str(), "allow-from", LOCAL_NETS); |
242b90e1 | 1709 | ::arg().preParseFile(configname.c_str(), "include-dir"); |
829849d6 AT |
1710 | ::arg().preParse(g_argc, g_argv, "include-dir"); |
1711 | ||
1712 | // then process includes | |
1713 | std::vector<std::string> extraConfigs; | |
242b90e1 AT |
1714 | ::arg().gatherIncludes(extraConfigs); |
1715 | ||
829849d6 | 1716 | BOOST_FOREACH(const std::string& fn, extraConfigs) { |
7e818521 | 1717 | if(!::arg().preParseFile(fn.c_str(), "allow-from-file", ::arg()["allow-from-file"])) |
1718 | throw runtime_error("Unable to re-parse configuration file include '"+fn+"'"); | |
1719 | if(!::arg().preParseFile(fn.c_str(), "allow-from", ::arg()["allow-from"])) | |
1720 | throw runtime_error("Unable to re-parse configuration file include '"+fn+"'"); | |
829849d6 | 1721 | } |
ca2c884c AT |
1722 | |
1723 | ::arg().preParse(g_argc, g_argv, "allow-from-file"); | |
1724 | ::arg().preParse(g_argc, g_argv, "allow-from"); | |
f27e6356 | 1725 | } |
49a699c4 BH |
1726 | |
1727 | NetmaskGroup* oldAllowFrom = t_allowFrom, *allowFrom=new NetmaskGroup; | |
1728 | ||
2c95fc65 BH |
1729 | if(!::arg()["allow-from-file"].empty()) { |
1730 | string line; | |
2c95fc65 BH |
1731 | ifstream ifs(::arg()["allow-from-file"].c_str()); |
1732 | if(!ifs) { | |
49a699c4 | 1733 | delete allowFrom; |
9c61b9d0 | 1734 | throw runtime_error("Could not open '"+::arg()["allow-from-file"]+"': "+stringerror()); |
2c95fc65 BH |
1735 | } |
1736 | ||
1737 | string::size_type pos; | |
1738 | while(getline(ifs,line)) { | |
1739 | pos=line.find('#'); | |
1740 | if(pos!=string::npos) | |
1741 | line.resize(pos); | |
1742 | trim(line); | |
1743 | if(line.empty()) | |
1744 | continue; | |
1745 | ||
18af64a8 | 1746 | allowFrom->addMask(line); |
2c95fc65 | 1747 | } |
49a699c4 | 1748 | L<<Logger::Warning<<"Done parsing " << allowFrom->size() <<" allow-from ranges from file '"<<::arg()["allow-from-file"]<<"' - overriding 'allow-from' setting"<<endl; |
2c95fc65 BH |
1749 | } |
1750 | else if(!::arg()["allow-from"].empty()) { | |
f7c1d4e3 BH |
1751 | vector<string> ips; |
1752 | stringtok(ips, ::arg()["allow-from"], ", "); | |
c36bc97a | 1753 | |
f7c1d4e3 BH |
1754 | L<<Logger::Warning<<"Only allowing queries from: "; |
1755 | for(vector<string>::const_iterator i = ips.begin(); i!= ips.end(); ++i) { | |
18af64a8 | 1756 | allowFrom->addMask(*i); |
f7c1d4e3 | 1757 | if(i!=ips.begin()) |
674cf0f6 | 1758 | L<<Logger::Warning<<", "; |
f7c1d4e3 BH |
1759 | L<<Logger::Warning<<*i; |
1760 | } | |
1761 | L<<Logger::Warning<<endl; | |
1762 | } | |
49a699c4 BH |
1763 | else { |
1764 | if(::arg()["local-address"]!="127.0.0.1" && ::arg().asNum("local-port")==53) | |
1765 | L<<Logger::Error<<"WARNING: Allowing queries from all IP addresses - this can be a security risk!"<<endl; | |
1766 | delete allowFrom; | |
1767 | allowFrom = 0; | |
1768 | } | |
1769 | ||
1770 | g_initialAllowFrom = allowFrom; | |
d7dae798 | 1771 | broadcastFunction(boost::bind(pleaseSupplantACLs, allowFrom)); |
49a699c4 BH |
1772 | delete oldAllowFrom; |
1773 | ||
1774 | l_initialized = true; | |
18af64a8 BH |
1775 | } |
1776 | ||
1777 | int serviceMain(int argc, char*argv[]) | |
1778 | { | |
5124de27 | 1779 | L.setName(s_programname); |
18af64a8 BH |
1780 | |
1781 | L.setLoglevel((Logger::Urgency)(6)); // info and up | |
1782 | ||
1783 | if(!::arg()["logging-facility"].empty()) { | |
f8499e52 BH |
1784 | int val=logFacilityToLOG(::arg().asNum("logging-facility") ); |
1785 | if(val >= 0) | |
1786 | theL().setFacility(val); | |
18af64a8 BH |
1787 | else |
1788 | L<<Logger::Error<<"Unknown logging facility "<<::arg().asNum("logging-facility") <<endl; | |
1789 | } | |
1790 | ||
ba1a571d | 1791 | showProductVersion(); |
18af64a8 | 1792 | seedRandom(::arg()["entropy-source"]); |
06ea9015 | 1793 | g_disthashseed=dns_random(0xffffffff); |
1794 | ||
18af64a8 BH |
1795 | parseACLs(); |
1796 | ||
eb5bae86 BH |
1797 | if(!::arg()["dont-query"].empty()) { |
1798 | g_dontQuery=new NetmaskGroup; | |
1799 | vector<string> ips; | |
1800 | stringtok(ips, ::arg()["dont-query"], ", "); | |
66e0b6ea BH |
1801 | ips.push_back("0.0.0.0"); |
1802 | ips.push_back("::"); | |
c36bc97a | 1803 | |
eb5bae86 BH |
1804 | L<<Logger::Warning<<"Will not send queries to: "; |
1805 | for(vector<string>::const_iterator i = ips.begin(); i!= ips.end(); ++i) { | |
1806 | g_dontQuery->addMask(*i); | |
1807 | if(i!=ips.begin()) | |
4957a608 | 1808 | L<<Logger::Warning<<", "; |
eb5bae86 BH |
1809 | L<<Logger::Warning<<*i; |
1810 | } | |
1811 | L<<Logger::Warning<<endl; | |
1812 | } | |
1813 | ||
f7c1d4e3 | 1814 | g_quiet=::arg().mustDo("quiet"); |
1bc3c142 BH |
1815 | g_weDistributeQueries = ::arg().mustDo("pdns-distributes-queries"); |
1816 | if(g_weDistributeQueries) { | |
1817 | L<<Logger::Warning<<"PowerDNS Recursor itself will distribute queries over threads"<<endl; | |
1818 | } | |
1819 | ||
77499b05 BH |
1820 | if(::arg()["trace"]=="fail") { |
1821 | SyncRes::setDefaultLogMode(SyncRes::Store); | |
1822 | } | |
1823 | else if(::arg().mustDo("trace")) { | |
1824 | SyncRes::setDefaultLogMode(SyncRes::Log); | |
f7c1d4e3 BH |
1825 | ::arg().set("quiet")="no"; |
1826 | g_quiet=false; | |
1827 | } | |
f7c1d4e3 | 1828 | |
aadceba8 | 1829 | SyncRes::s_minimumTTL = ::arg().asNum("minimum-ttl-override"); |
1830 | ||
4e9a20e6 | 1831 | checkLinuxIPv6Limits(); |
5a38281c BH |
1832 | try { |
1833 | vector<string> addrs; | |
1834 | if(!::arg()["query-local-address6"].empty()) { | |
1835 | SyncRes::s_doIPv6=true; | |
d4fb76e9 | 1836 | L<<Logger::Warning<<"Enabling IPv6 transport for outgoing queries"<<endl; |
5a38281c BH |
1837 | |
1838 | stringtok(addrs, ::arg()["query-local-address6"], ", ;"); | |
1839 | BOOST_FOREACH(const string& addr, addrs) { | |
4957a608 | 1840 | g_localQueryAddresses6.push_back(ComboAddress(addr)); |
5a38281c BH |
1841 | } |
1842 | } | |
d4fb76e9 BH |
1843 | else { |
1844 | L<<Logger::Warning<<"NOT using IPv6 for outgoing queries - set 'query-local-address6=::' to enable"<<endl; | |
1845 | } | |
5a38281c BH |
1846 | addrs.clear(); |
1847 | stringtok(addrs, ::arg()["query-local-address"], ", ;"); | |
1848 | BOOST_FOREACH(const string& addr, addrs) { | |
1849 | g_localQueryAddresses4.push_back(ComboAddress(addr)); | |
1850 | } | |
1851 | } | |
1852 | catch(std::exception& e) { | |
1853 | L<<Logger::Error<<"Assigning local query addresses: "<<e.what(); | |
1854 | exit(99); | |
f7c1d4e3 | 1855 | } |
f555e92e | 1856 | |
578361b3 | 1857 | SyncRes::s_noEDNSPing = true; // ::arg().mustDo("disable-edns-ping"); |
4bfae16d | 1858 | SyncRes::s_noEDNS = ::arg().mustDo("disable-edns"); |
578361b3 | 1859 | if(!SyncRes::s_noEDNS) { |
1860 | L<<Logger::Warning<<"Running in experimental EDNS mode - may cause problems"<<endl; | |
1861 | } | |
bb4bdbaf | 1862 | |
1051f8a9 BH |
1863 | SyncRes::s_nopacketcache = ::arg().mustDo("disable-packetcache"); |
1864 | ||
f7c1d4e3 | 1865 | SyncRes::s_maxnegttl=::arg().asNum("max-negative-ttl"); |
c3e753c7 | 1866 | SyncRes::s_maxcachettl=::arg().asNum("max-cache-ttl"); |
1051f8a9 BH |
1867 | SyncRes::s_packetcachettl=::arg().asNum("packetcache-ttl"); |
1868 | SyncRes::s_packetcacheservfailttl=::arg().asNum("packetcache-servfail-ttl"); | |
628e2c7b PA |
1869 | SyncRes::s_serverdownmaxfails=::arg().asNum("server-down-max-fails"); |
1870 | SyncRes::s_serverdownthrottletime=::arg().asNum("server-down-throttle-time"); | |
f7c1d4e3 | 1871 | SyncRes::s_serverID=::arg()["server-id"]; |
173d790e | 1872 | SyncRes::s_maxqperq=::arg().asNum("max-qperq"); |
f7c1d4e3 BH |
1873 | if(SyncRes::s_serverID.empty()) { |
1874 | char tmp[128]; | |
1875 | gethostname(tmp, sizeof(tmp)-1); | |
1876 | SyncRes::s_serverID=tmp; | |
1877 | } | |
1878 | ||
5b0ddd18 | 1879 | g_networkTimeoutMsec = ::arg().asNum("network-timeout"); |
bb4bdbaf | 1880 | |
49a699c4 | 1881 | g_initialDomainMap = parseAuthAndForwards(); |
674cf0f6 | 1882 | |
08f3f638 | 1883 | g_latencyStatSize=::arg().asNum("latency-statistic-size"); |
b3b5459d | 1884 | |
f7c1d4e3 | 1885 | g_logCommonErrors=::arg().mustDo("log-common-errors"); |
e661a20b PD |
1886 | |
1887 | g_anyToTcp = ::arg().mustDo("any-to-tcp"); | |
a09a8ce0 PD |
1888 | g_udpTruncationThreshold = ::arg().asNum("udp-truncation-threshold"); |
1889 | ||
f7c1d4e3 BH |
1890 | makeUDPServerSockets(); |
1891 | makeTCPServerSockets(); | |
815099b2 | 1892 | |
677e2a46 BH |
1893 | int forks; |
1894 | for(forks = 0; forks < ::arg().asNum("processes") - 1; ++forks) { | |
1bc3c142 BH |
1895 | if(!fork()) // we are child |
1896 | break; | |
1897 | } | |
1898 | ||
2d733c0f | 1899 | s_pidfname=::arg()["socket-dir"]+"/"+s_programname+".pid"; |
815099b2 BH |
1900 | if(!s_pidfname.empty()) |
1901 | unlink(s_pidfname.c_str()); // remove possible old pid file | |
f7c1d4e3 | 1902 | |
f7c1d4e3 BH |
1903 | if(::arg().mustDo("daemon")) { |
1904 | L<<Logger::Warning<<"Calling daemonize, going to background"<<endl; | |
1905 | L.toConsole(Logger::Critical); | |
f7c1d4e3 BH |
1906 | daemonize(); |
1907 | } | |
1908 | signal(SIGUSR1,usr1Handler); | |
1909 | signal(SIGUSR2,usr2Handler); | |
1910 | signal(SIGPIPE,SIG_IGN); | |
1911 | writePid(); | |
677e2a46 | 1912 | makeControlChannelSocket( ::arg().asNum("processes") > 1 ? forks : -1); |
138435cb BH |
1913 | |
1914 | int newgid=0; | |
1915 | if(!::arg()["setgid"].empty()) | |
1916 | newgid=Utility::makeGidNumeric(::arg()["setgid"]); | |
1917 | int newuid=0; | |
1918 | if(!::arg()["setuid"].empty()) | |
1919 | newuid=Utility::makeUidNumeric(::arg()["setuid"]); | |
1920 | ||
f1d6a7ce KM |
1921 | Utility::dropGroupPrivs(newuid, newgid); |
1922 | ||
138435cb BH |
1923 | if (!::arg()["chroot"].empty()) { |
1924 | if (chroot(::arg()["chroot"].c_str())<0 || chdir("/") < 0) { | |
1925 | L<<Logger::Error<<"Unable to chroot to '"+::arg()["chroot"]+"': "<<strerror (errno)<<", exiting"<<endl; | |
1926 | exit(1); | |
1927 | } | |
1928 | } | |
1929 | ||
f1d6a7ce | 1930 | Utility::dropUserPrivs(newuid); |
77c535ae | 1931 | g_numThreads = ::arg().asNum("threads") + ::arg().mustDo("pdns-distributes-queries"); |
343257a4 | 1932 | |
49a699c4 | 1933 | makeThreadPipes(); |
5d4dd7fe BH |
1934 | |
1935 | g_tcpTimeout=::arg().asNum("client-tcp-timeout"); | |
1936 | g_maxTCPPerClient=::arg().asNum("max-tcp-per-client"); | |
3a8a4d68 | 1937 | g_maxMThreads=::arg().asNum("max-mthreads"); |
36849ff2 | 1938 | checkOrFixFDS(); |
343257a4 | 1939 | |
c3828c03 | 1940 | if(g_numThreads == 1) { |
76698c6e | 1941 | L<<Logger::Warning<<"Operating unthreaded"<<endl; |
76698c6e BH |
1942 | recursorThread(0); |
1943 | } | |
1944 | else { | |
1945 | pthread_t tid; | |
c3828c03 BH |
1946 | L<<Logger::Warning<<"Launching "<< g_numThreads <<" threads"<<endl; |
1947 | for(unsigned int n=0; n < g_numThreads; ++n) { | |
77499b05 | 1948 | pthread_create(&tid, 0, recursorThread, (void*)(long)n); |
76698c6e BH |
1949 | } |
1950 | void* res; | |
49a699c4 BH |
1951 | |
1952 | ||
76698c6e | 1953 | pthread_join(tid, &res); |
bb4bdbaf | 1954 | } |
bb4bdbaf BH |
1955 | return 0; |
1956 | } | |
1957 | ||
1958 | void* recursorThread(void* ptr) | |
1959 | try | |
1960 | { | |
2e2cd8ec | 1961 | t_id=(int) (long) ptr; |
49a699c4 | 1962 | SyncRes tmp(g_now); // make sure it allocates tsstorage before we do anything, like primeHints or so.. |
ac0e821b | 1963 | t_sstorage->domainmap = g_initialDomainMap; |
49a699c4 BH |
1964 | t_allowFrom = g_initialAllowFrom; |
1965 | t_udpclientsocks = new UDPClientSocks(); | |
bd0289fc | 1966 | t_tcpClientCounts = new tcpClientCounts_t(); |
49a699c4 | 1967 | primeHints(); |
674cf0f6 | 1968 | |
49a699c4 BH |
1969 | t_packetCache = new RecursorPacketCache(); |
1970 | ||
1971 | L<<Logger::Warning<<"Done priming cache with root hints"<<endl; | |
1972 | ||
5704e107 | 1973 | t_pdl = new shared_ptr<RecursorLua>(); |
49a699c4 | 1974 | |
674cf0f6 BH |
1975 | try { |
1976 | if(!::arg()["lua-dns-script"].empty()) { | |
5704e107 | 1977 | *t_pdl = shared_ptr<RecursorLua>(new RecursorLua(::arg()["lua-dns-script"])); |
674cf0f6 BH |
1978 | L<<Logger::Warning<<"Loaded 'lua' script from '"<<::arg()["lua-dns-script"]<<"'"<<endl; |
1979 | } | |
1980 | ||
1981 | } | |
1982 | catch(std::exception &e) { | |
1983 | L<<Logger::Error<<"Failed to load 'lua' script from '"<<::arg()["lua-dns-script"]<<"': "<<e.what()<<endl; | |
1984 | exit(99); | |
1985 | } | |
1986 | ||
77499b05 BH |
1987 | t_traceRegex = new shared_ptr<Regex>(); |
1988 | ||
1989 | ||
b3b5459d BH |
1990 | t_remotes = new RemoteKeeper(); |
1991 | t_remotes->remotes.resize(::arg().asNum("remotes-ringbuffer-entries") / g_numThreads); | |
1992 | ||
1993 | if(!t_remotes->remotes.empty()) | |
1994 | memset(&t_remotes->remotes[0], 0, t_remotes->remotes.size() * sizeof(RemoteKeeper::remotes_t::value_type)); | |
1995 | ||
1996 | ||
bb4bdbaf BH |
1997 | MT=new MTasker<PacketID,string>(::arg().asNum("stack-size")); |
1998 | ||
bb4bdbaf BH |
1999 | PacketID pident; |
2000 | ||
2001 | t_fdm=getMultiplexer(); | |
f3d1d67b | 2002 | if(!t_id) { |
30a1aa92 | 2003 | if(::arg().mustDo("experimental-webserver")) { |
2004 | L<<Logger::Warning << "Enabling web server" << endl; | |
8989097d | 2005 | try { |
1ce57618 | 2006 | new RecursorWebServer(t_fdm); |
8989097d CH |
2007 | } |
2008 | catch(PDNSException &e) { | |
2009 | L<<Logger::Error<<"Exception: "<<e.reason<<endl; | |
2010 | exit(99); | |
2011 | } | |
f3d1d67b | 2012 | } |
83252304 | 2013 | L<<Logger::Error<<"Enabled '"<< t_fdm->getName() << "' multiplexer"<<endl; |
f3d1d67b | 2014 | } |
83252304 | 2015 | |
49a699c4 | 2016 | t_fdm->addReadFD(g_pipes[t_id].readToThread, handlePipeRequest); |
83252304 | 2017 | |
1bc3c142 BH |
2018 | if(!g_weDistributeQueries || !t_id) // if we distribute queries, only t_id = 0 listens |
2019 | for(deferredAdd_t::const_iterator i=deferredAdd.begin(); i!=deferredAdd.end(); ++i) | |
2020 | t_fdm->addReadFD(i->first, i->second); | |
f7c1d4e3 | 2021 | |
674cf0f6 | 2022 | if(!t_id) { |
674cf0f6 BH |
2023 | t_fdm->addReadFD(s_rcc.d_fd, handleRCC); // control channel |
2024 | } | |
1bc3c142 | 2025 | |
f7c1d4e3 | 2026 | unsigned int maxTcpClients=::arg().asNum("max-tcp-clients"); |
f7c1d4e3 | 2027 | |
f7c1d4e3 | 2028 | bool listenOnTCP(true); |
49a699c4 | 2029 | |
2c78bd57 | 2030 | time_t last_carbon=0; |
2031 | time_t carbonInterval=::arg().asNum("carbon-interval"); | |
3427fa8a | 2032 | counter=0; // used to periodically execute certain tasks |
f7c1d4e3 | 2033 | for(;;) { |
ac0e821b | 2034 | while(MT->schedule(&g_now)); // MTasker letting the mthreads do their thing |
f7c1d4e3 | 2035 | |
3427fa8a BH |
2036 | if(!(counter%500)) { |
2037 | MT->makeThread(houseKeeping, 0); | |
f7c1d4e3 BH |
2038 | } |
2039 | ||
d2392145 | 2040 | if(!(counter%55)) { |
d8f6d49f | 2041 | typedef vector<pair<int, FDMultiplexer::funcparam_t> > expired_t; |
bb4bdbaf | 2042 | expired_t expired=t_fdm->getTimeouts(g_now); |
4957a608 | 2043 | |
f7c1d4e3 | 2044 | for(expired_t::iterator i=expired.begin() ; i != expired.end(); ++i) { |
cd989c87 | 2045 | shared_ptr<TCPConnection> conn=any_cast<shared_ptr<TCPConnection> >(i->second); |
4957a608 | 2046 | if(g_logCommonErrors) |
cd989c87 | 2047 | L<<Logger::Warning<<"Timeout from remote TCP client "<< conn->d_remote.toString() <<endl; |
4957a608 | 2048 | t_fdm->removeReadFD(i->first); |
f7c1d4e3 BH |
2049 | } |
2050 | } | |
2051 | ||
2052 | counter++; | |
2053 | ||
3427fa8a | 2054 | if(!t_id && statsWanted) { |
f7c1d4e3 BH |
2055 | doStats(); |
2056 | } | |
2057 | ||
2058 | Utility::gettimeofday(&g_now, 0); | |
2c78bd57 | 2059 | |
2060 | if(!t_id && (g_now.tv_sec - last_carbon >= carbonInterval)) { | |
2061 | MT->makeThread(doCarbonDump, 0); | |
2062 | last_carbon = g_now.tv_sec; | |
2063 | } | |
2064 | ||
bb4bdbaf | 2065 | t_fdm->run(&g_now); |
3ea54bf0 | 2066 | // 'run' updates g_now for us |
f7c1d4e3 | 2067 | |
b8ef5c5c | 2068 | if(!g_weDistributeQueries || !t_id) { // if pdns distributes queries, only tid 0 should do this |
5c889cf5 | 2069 | if(listenOnTCP) { |
2070 | if(TCPConnection::getCurrentConnections() > maxTcpClients) { // shutdown, too many connections | |
2071 | for(tcpListenSockets_t::iterator i=g_tcpListenSockets.begin(); i != g_tcpListenSockets.end(); ++i) | |
2072 | t_fdm->removeReadFD(*i); | |
2073 | listenOnTCP=false; | |
2074 | } | |
f7c1d4e3 | 2075 | } |
5c889cf5 | 2076 | else { |
2077 | if(TCPConnection::getCurrentConnections() <= maxTcpClients) { // reenable | |
2078 | for(tcpListenSockets_t::iterator i=g_tcpListenSockets.begin(); i != g_tcpListenSockets.end(); ++i) | |
2079 | t_fdm->addReadFD(*i, handleNewTCPQuestion); | |
2080 | listenOnTCP=true; | |
2081 | } | |
f7c1d4e3 BH |
2082 | } |
2083 | } | |
2084 | } | |
2085 | } | |
3f81d239 | 2086 | catch(PDNSException &ae) { |
bb4bdbaf BH |
2087 | L<<Logger::Error<<"Exception: "<<ae.reason<<endl; |
2088 | return 0; | |
2089 | } | |
2090 | catch(std::exception &e) { | |
2091 | L<<Logger::Error<<"STL Exception: "<<e.what()<<endl; | |
2092 | return 0; | |
2093 | } | |
2094 | catch(...) { | |
2095 | L<<Logger::Error<<"any other exception in main: "<<endl; | |
2096 | return 0; | |
2097 | } | |
2098 | ||
51e2144e | 2099 | |
288f4aa9 BH |
2100 | int main(int argc, char **argv) |
2101 | { | |
dbd23fc2 BH |
2102 | g_argc = argc; |
2103 | g_argv = argv; | |
5e3de507 | 2104 | g_stats.startupTime=time(0); |
3e135495 | 2105 | versionSetProduct(ProductRecursor); |
8a63d3ce | 2106 | reportBasicTypes(); |
0007c2e5 | 2107 | reportOtherTypes(); |
ea634573 | 2108 | |
22030c37 | 2109 | int ret = EXIT_SUCCESS; |
caa6eefa | 2110 | |
288f4aa9 | 2111 | try { |
f888311c | 2112 | ::arg().set("stack-size","stack size per mthread")="200000"; |
2e3d8a19 | 2113 | ::arg().set("soa-minimum-ttl","Don't change")="0"; |
2e3d8a19 | 2114 | ::arg().set("no-shuffle","Don't change")="off"; |
2e3d8a19 | 2115 | ::arg().set("local-port","port to listen on")="53"; |
32252594 | 2116 | ::arg().set("local-address","IP addresses to listen on, separated by spaces or commas. Also accepts ports.")="127.0.0.1"; |
77499b05 | 2117 | ::arg().set("trace","if we should output heaps of logging. set to 'fail' to only log failing domains")="off"; |
2e3d8a19 | 2118 | ::arg().set("daemon","Operate as a daemon")="yes"; |
34162f8f | 2119 | ::arg().set("loglevel","Amount of logging. Higher is more. Do not set below 3")="4"; |
0e9d9ce2 | 2120 | ::arg().set("log-common-errors","If we should log rather common errors")="yes"; |
2e3d8a19 BH |
2121 | ::arg().set("chroot","switch to chroot jail")=""; |
2122 | ::arg().set("setgid","If set, change group id to this gid for more security")=""; | |
2123 | ::arg().set("setuid","If set, change user id to this uid for more security")=""; | |
5b0ddd18 | 2124 | ::arg().set("network-timeout", "Wait this nummer of milliseconds for network i/o")="1500"; |
bb4bdbaf | 2125 | ::arg().set("threads", "Launch this number of threads")="2"; |
1bc3c142 | 2126 | ::arg().set("processes", "Launch this number of processes (EXPERIMENTAL, DO NOT CHANGE)")="1"; |
5124de27 | 2127 | ::arg().set("config-name","Name of this virtual configuration - will rename the binary image")=""; |
9097239c | 2128 | ::arg().set( "experimental-logfile", "Filename of the log file for JSON parser" )= "/var/log/pdns.log"; |
88d77d73 CH |
2129 | ::arg().setSwitch("experimental-webserver", "Start a webserver for monitoring") = "no"; |
2130 | ::arg().set("experimental-webserver-address", "IP Address of webserver to listen on") = "127.0.0.1"; | |
2131 | ::arg().set("experimental-webserver-port", "Port of webserver to listen on") = "8082"; | |
2132 | ::arg().set("experimental-webserver-password", "Password required for accessing the webserver") = ""; | |
69e7f117 | 2133 | ::arg().set("webserver-allow-from","Webserver access is only allowed from these subnets")="0.0.0.0/0,::/0"; |
c348c0c8 | 2134 | ::arg().set("experimental-api-config-dir", "Directory where REST API stores config and zones") = ""; |
bbef8f04 | 2135 | ::arg().set("experimental-api-key", "REST API Static authentication key (required for API use)") = ""; |
cc08b5a9 | 2136 | ::arg().set("carbon-ourname", "If set, overrides our reported hostname for carbon stats")=""; |
2c78bd57 | 2137 | ::arg().set("carbon-server", "If set, send metrics in carbon (graphite) format to this server")=""; |
2138 | ::arg().set("carbon-interval", "Number of seconds between carbon (graphite) updates")="30"; | |
b4ae7322 | 2139 | ::arg().set("experimental-api-readonly", "If the JSON API should disallow data modification") = "no"; |
c038218b | 2140 | ::arg().set("quiet","Suppress logging of questions and answers")=""; |
f27e6356 | 2141 | ::arg().set("logging-facility","Facility to log messages as. 0 corresponds to local0")=""; |
2e3d8a19 | 2142 | ::arg().set("config-dir","Location of configuration directory (recursor.conf)")=SYSCONFDIR; |
fdbf35ac BH |
2143 | ::arg().set("socket-owner","Owner of socket")=""; |
2144 | ::arg().set("socket-group","Group of socket")=""; | |
2145 | ::arg().set("socket-mode", "Permissions for socket")=""; | |
fdbf35ac | 2146 | |
2e3d8a19 BH |
2147 | ::arg().set("socket-dir","Where the controlsocket will live")=LOCALSTATEDIR; |
2148 | ::arg().set("delegation-only","Which domains we only accept delegations from")=""; | |
2149 | ::arg().set("query-local-address","Source IP address for sending queries")="0.0.0.0"; | |
d4fb76e9 | 2150 | ::arg().set("query-local-address6","Source IPv6 address for sending queries. IF UNSET, IPv6 WILL NOT BE USED FOR OUTGOING QUERIES")=""; |
2e3d8a19 | 2151 | ::arg().set("client-tcp-timeout","Timeout in seconds when talking to TCP clients")="2"; |
85c32340 | 2152 | ::arg().set("max-mthreads", "Maximum number of simultaneous Mtasker threads")="2048"; |
2e3d8a19 | 2153 | ::arg().set("max-tcp-clients","Maximum number of simultaneous TCP clients")="128"; |
324dc148 | 2154 | ::arg().set("server-down-max-fails","Maximum number of consecutive timeouts (and unreachables) to mark a server as down ( 0 => disabled )")="64"; |
979edd70 | 2155 | ::arg().set("server-down-throttle-time","Number of seconds to throttle all queries to a server after being marked as down")="60"; |
2e3d8a19 | 2156 | ::arg().set("hint-file", "If set, load root hints from this file")=""; |
b45eb27c | 2157 | ::arg().set("max-cache-entries", "If set, maximum number of entries in the main cache")="1000000"; |
a9af3782 | 2158 | ::arg().set("max-negative-ttl", "maximum number of seconds to keep a negative cached entry in memory")="3600"; |
c3e753c7 | 2159 | ::arg().set("max-cache-ttl", "maximum number of seconds to keep a cached entry in memory")="86400"; |
1051f8a9 | 2160 | ::arg().set("packetcache-ttl", "maximum number of seconds to keep a cached entry in packetcache")="3600"; |
927c12b0 | 2161 | ::arg().set("max-packetcache-entries", "maximum number of entries to keep in the packetcache")="500000"; |
1051f8a9 | 2162 | ::arg().set("packetcache-servfail-ttl", "maximum number of seconds to keep a cached servfail entry in packetcache")="60"; |
7f7b8d55 | 2163 | ::arg().set("server-id", "Returned when queried for 'server.id' TXT or NSID, defaults to hostname")=""; |
a9af3782 | 2164 | ::arg().set("remotes-ringbuffer-entries", "maximum number of packets to store statistics for")="0"; |
ba1a571d | 2165 | ::arg().set("version-string", "string reported on version.pdns or version.bind")=fullVersionString(); |
49a699c4 | 2166 | ::arg().set("allow-from", "If set, only allow these comma separated netmasks to recurse")=LOCAL_NETS; |
2c95fc65 | 2167 | ::arg().set("allow-from-file", "If set, load allowed netmasks from this file")=""; |
51e2144e | 2168 | ::arg().set("entropy-source", "If set, read entropy from this file")="/dev/urandom"; |
12cd44ee | 2169 | ::arg().set("dont-query", "If set, do not query these netmasks for DNS data")=DONT_QUERY; |
4e120339 | 2170 | ::arg().set("max-tcp-per-client", "If set, maximum number of TCP sessions per client (IP address)")="0"; |
0d5f0a9f | 2171 | ::arg().set("spoof-nearmiss-max", "If non-zero, assume spoofing after this many near misses")="20"; |
4ef015cd | 2172 | ::arg().set("single-socket", "If set, only use a single socket for outgoing queries")="off"; |
5605c067 BH |
2173 | ::arg().set("auth-zones", "Zones for which we have authoritative data, comma separated domain=file pairs ")=""; |
2174 | ::arg().set("forward-zones", "Zones for which we forward queries, comma separated domain=ip pairs")=""; | |
927c12b0 BH |
2175 | ::arg().set("forward-zones-recurse", "Zones for which we forward queries with recursion bit, comma separated domain=ip pairs")=""; |
2176 | ::arg().set("forward-zones-file", "File with (+)domain=ip pairs for forwarding")=""; | |
5605c067 | 2177 | ::arg().set("export-etc-hosts", "If we should serve up contents from /etc/hosts")="off"; |
ac0b4eb3 | 2178 | ::arg().set("export-etc-hosts-search-suffix", "Also serve up the contents of /etc/hosts with this suffix")=""; |
3ea54bf0 | 2179 | ::arg().set("etc-hosts-file", "Path to 'hosts' file")="/etc/hosts"; |
9bc8c14c | 2180 | ::arg().set("serve-rfc1918", "If we should be authoritative for RFC 1918 private IP space")=""; |
4485aa35 | 2181 | ::arg().set("lua-dns-script", "Filename containing an optional 'lua' script that will be used to modify dns answers")=""; |
08f3f638 | 2182 | ::arg().set("latency-statistic-size","Number of latency values to calculate the qa-latency average")="10000"; |
578361b3 | 2183 | // ::arg().setSwitch( "disable-edns-ping", "Disable EDNSPing - EXPERIMENTAL, LEAVE DISABLED" )= "no"; |
2184 | ::arg().setSwitch( "disable-edns", "Disable EDNS - EXPERIMENTAL, LEAVE DISABLED" )= ""; | |
1bc3c142 | 2185 | ::arg().setSwitch( "disable-packetcache", "Disable packetcache" )= "no"; |
966d3ba8 | 2186 | ::arg().setSwitch( "pdns-distributes-queries", "If PowerDNS itself should distribute queries over threads")=""; |
e661a20b | 2187 | ::arg().setSwitch( "any-to-tcp","Answer ANY queries with tc=1, shunting to TCP" )="no"; |
a09a8ce0 | 2188 | ::arg().set("udp-truncation-threshold", "Maximum UDP response size before we truncate")="1680"; |
aadceba8 | 2189 | ::arg().set("minimum-ttl-override", "Set under adverse conditions, a minimum TTL")="0"; |
173d790e | 2190 | ::arg().set("max-qperq", "Maximum outgoing queries per query")="50"; |
a09a8ce0 | 2191 | |
68e6df3c | 2192 | ::arg().set("include-dir","Include *.conf files from this directory")=""; |
d67620e4 | 2193 | ::arg().set("security-poll-suffix","Domain name from which to query security update notifications")="secpoll.powerdns.com."; |
2e3d8a19 BH |
2194 | |
2195 | ::arg().setCmd("help","Provide a helpful message"); | |
ba1a571d | 2196 | ::arg().setCmd("version","Print version string"); |
d5141417 | 2197 | ::arg().setCmd("config","Output blank configuration"); |
f27e6356 | 2198 | L.toConsole(Logger::Info); |
2e3d8a19 | 2199 | ::arg().laxParse(argc,argv); // do a lax parse |
c75a6a9e | 2200 | |
2d733c0f CH |
2201 | string configname=::arg()["config-dir"]+"/recursor.conf"; |
2202 | if(::arg()["config-name"]!="") { | |
2203 | configname=::arg()["config-dir"]+"/recursor-"+::arg()["config-name"]+".conf"; | |
5124de27 | 2204 | s_programname+="-"+::arg()["config-name"]; |
2d733c0f CH |
2205 | } |
2206 | cleanSlashes(configname); | |
5124de27 | 2207 | |
577cf284 BH |
2208 | if(::arg().mustDo("config")) { |
2209 | cout<<::arg().configstring()<<endl; | |
2210 | exit(0); | |
2211 | } | |
2212 | ||
2e3d8a19 | 2213 | if(!::arg().file(configname.c_str())) |
c75a6a9e BH |
2214 | L<<Logger::Warning<<"Unable to parse configuration file '"<<configname<<"'"<<endl; |
2215 | ||
2e3d8a19 | 2216 | ::arg().parse(argc,argv); |
c836dc19 | 2217 | |
2e3d8a19 | 2218 | ::arg().set("delegation-only")=toLower(::arg()["delegation-only"]); |
562588a3 | 2219 | |
61d74169 | 2220 | if(::arg().asNum("threads")==1) |
2221 | ::arg().set("pdns-distributes-queries")="no"; | |
2222 | ||
2e3d8a19 | 2223 | if(::arg().mustDo("help")) { |
ff5ba4f9 WA |
2224 | cout<<"syntax:"<<endl<<endl; |
2225 | cout<<::arg().helpstring(::arg()["help"])<<endl; | |
2226 | exit(0); | |
b636533b | 2227 | } |
5e3de507 | 2228 | if(::arg().mustDo("version")) { |
ba1a571d | 2229 | showProductVersion(); |
3613a51c | 2230 | showBuildConfiguration(); |
5e3de507 BH |
2231 | exit(99); |
2232 | } | |
b636533b | 2233 | |
34162f8f CH |
2234 | Logger::Urgency logUrgency = (Logger::Urgency)::arg().asNum("loglevel"); |
2235 | if (logUrgency < Logger::Error) | |
2236 | logUrgency = Logger::Error; | |
2237 | L.setLoglevel(logUrgency); | |
2238 | L.toConsole(logUrgency); | |
2239 | ||
f7c1d4e3 | 2240 | serviceMain(argc, argv); |
288f4aa9 | 2241 | } |
3f81d239 | 2242 | catch(PDNSException &ae) { |
c836dc19 | 2243 | L<<Logger::Error<<"Exception: "<<ae.reason<<endl; |
22030c37 | 2244 | ret=EXIT_FAILURE; |
288f4aa9 | 2245 | } |
fdbf35ac | 2246 | catch(std::exception &e) { |
c836dc19 | 2247 | L<<Logger::Error<<"STL Exception: "<<e.what()<<endl; |
22030c37 | 2248 | ret=EXIT_FAILURE; |
288f4aa9 BH |
2249 | } |
2250 | catch(...) { | |
c836dc19 | 2251 | L<<Logger::Error<<"any other exception in main: "<<endl; |
22030c37 | 2252 | ret=EXIT_FAILURE; |
288f4aa9 | 2253 | } |
caa6eefa | 2254 | |
22030c37 | 2255 | return ret; |
288f4aa9 | 2256 | } |