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288f4aa9 BH |
1 | /* |
2 | PowerDNS Versatile Database Driven Nameserver | |
77499b05 | 3 | Copyright (C) 2003 - 2013 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> |
f3d1d67b | 27 | #include "json_ws.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> | |
34 | #include <map> | |
35 | #include <set> | |
97bb160b | 36 | #include "recursor_cache.hh" |
38c9ceaa | 37 | #include "cachecleaner.hh" |
288f4aa9 | 38 | #include <stdio.h> |
c75a6a9e | 39 | #include <signal.h> |
288f4aa9 | 40 | #include <stdlib.h> |
bb4bdbaf | 41 | #include "misc.hh" |
288f4aa9 BH |
42 | #include "mtasker.hh" |
43 | #include <utility> | |
288f4aa9 BH |
44 | #include "arguments.hh" |
45 | #include "syncres.hh" | |
88def049 BH |
46 | #include <fcntl.h> |
47 | #include <fstream> | |
5c633640 BH |
48 | #include "sstuff.hh" |
49 | #include <boost/tuple/tuple.hpp> | |
50 | #include <boost/tuple/tuple_comparison.hpp> | |
72df400f | 51 | #include <boost/shared_array.hpp> |
ea634573 | 52 | #include <boost/lexical_cast.hpp> |
7f1fa77d | 53 | #include <boost/function.hpp> |
5605c067 | 54 | #include <boost/algorithm/string.hpp> |
40a3dd64 | 55 | #include <netinet/tcp.h> |
ea634573 BH |
56 | #include "dnsparser.hh" |
57 | #include "dnswriter.hh" | |
58 | #include "dnsrecords.hh" | |
f814d7c8 | 59 | #include "zoneparser-tng.hh" |
1d5b3ce6 | 60 | #include "rec_channel.hh" |
aaacf7f2 | 61 | #include "logger.hh" |
c8ddb7c2 | 62 | #include "iputils.hh" |
09e6702a | 63 | #include "mplexer.hh" |
c038218b | 64 | #include "config.h" |
5704e107 | 65 | #include "lua-recursor.hh" |
ba1a571d | 66 | #include "version.hh" |
1d5b3ce6 | 67 | |
a2bfc3ff BH |
68 | #ifndef RECURSOR |
69 | #include "statbag.hh" | |
70 | StatBag S; | |
71 | #endif | |
72 | ||
bb4bdbaf | 73 | __thread FDMultiplexer* t_fdm; |
674cf0f6 | 74 | __thread unsigned int t_id; |
09e6702a | 75 | unsigned int g_maxTCPPerClient; |
5b0ddd18 | 76 | unsigned int g_networkTimeoutMsec; |
09e6702a | 77 | bool g_logCommonErrors; |
e661a20b | 78 | bool g_anyToTcp; |
a09a8ce0 | 79 | uint16_t g_udpTruncationThreshold; |
5704e107 | 80 | __thread shared_ptr<RecursorLua>* t_pdl; |
b3b5459d | 81 | __thread RemoteKeeper* t_remotes; |
77499b05 | 82 | __thread shared_ptr<Regex>* t_traceRegex; |
674cf0f6 | 83 | |
d7dae798 BH |
84 | RecursorControlChannel s_rcc; // only active in thread 0 |
85 | ||
86 | // for communicating with our threads | |
49a699c4 BH |
87 | struct ThreadPipeSet |
88 | { | |
89 | int writeToThread; | |
90 | int readToThread; | |
91 | int writeFromThread; | |
92 | int readFromThread; | |
93 | }; | |
3ea54bf0 | 94 | |
d7dae798 | 95 | vector<ThreadPipeSet> g_pipes; // effectively readonly after startup |
5c633640 | 96 | |
d7dae798 | 97 | SyncRes::domainmap_t* g_initialDomainMap; // new threads needs this to be setup |
49a699c4 BH |
98 | |
99 | #include "namespaces.hh" | |
3ea54bf0 | 100 | |
49a699c4 | 101 | __thread MemRecursorCache* t_RC; |
16beeaa4 | 102 | __thread RecursorPacketCache* t_packetCache; |
1d5b3ce6 BH |
103 | RecursorStats g_stats; |
104 | bool g_quiet; | |
49a699c4 | 105 | |
1bc3c142 BH |
106 | bool g_weDistributeQueries; // if true, only 1 thread listens on the incoming query sockets |
107 | ||
49a699c4 BH |
108 | static __thread NetmaskGroup* t_allowFrom; |
109 | static NetmaskGroup* g_initialAllowFrom; // new thread needs to be setup with this | |
110 | ||
eb5bae86 | 111 | NetmaskGroup* g_dontQuery; |
5124de27 | 112 | string s_programname="recursor"; |
49a699c4 | 113 | |
40a3dd64 BH |
114 | typedef vector<int> tcpListenSockets_t; |
115 | tcpListenSockets_t g_tcpListenSockets; // shared across threads, but this is fine, never written to from a thread. All threads listen on all sockets | |
3159c9ef | 116 | int g_tcpTimeout; |
85c32340 | 117 | unsigned int g_maxMThreads; |
d7dae798 | 118 | struct timeval g_now; // timestamp, updated (too) frequently |
40a3dd64 | 119 | map<int, ComboAddress> g_listenSocketsAddresses; // is shared across all threads right now |
18af64a8 | 120 | |
d7dae798 BH |
121 | __thread MT_t* MT; // the big MTasker |
122 | ||
c3828c03 BH |
123 | unsigned int g_numThreads; |
124 | ||
df14d9f8 | 125 | #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, fe80::/10" |
49a699c4 | 126 | |
d7dae798 | 127 | //! used to send information to a newborn mthread |
ea634573 | 128 | struct DNSComboWriter { |
3ea54bf0 | 129 | DNSComboWriter(const char* data, uint16_t len, const struct timeval& now) : d_mdp(data, len), d_now(now), |
232f0877 | 130 | d_tcp(false), d_socket(-1) |
ea634573 BH |
131 | {} |
132 | MOADNSParser d_mdp; | |
00c9b8c1 | 133 | void setRemote(const ComboAddress* sa) |
ea634573 | 134 | { |
37d3f960 | 135 | d_remote=*sa; |
ea634573 BH |
136 | } |
137 | ||
138 | void setSocket(int sock) | |
139 | { | |
140 | d_socket=sock; | |
141 | } | |
a1754c6a BH |
142 | |
143 | string getRemote() const | |
144 | { | |
37d3f960 | 145 | return d_remote.toString(); |
a1754c6a BH |
146 | } |
147 | ||
c9e9e5e0 | 148 | struct timeval d_now; |
37d3f960 | 149 | ComboAddress d_remote; |
ea634573 BH |
150 | bool d_tcp; |
151 | int d_socket; | |
cd989c87 | 152 | shared_ptr<TCPConnection> d_tcpConnection; |
ea634573 BH |
153 | }; |
154 | ||
155 | ||
288f4aa9 BH |
156 | ArgvMap &arg() |
157 | { | |
158 | static ArgvMap theArg; | |
159 | return theArg; | |
160 | } | |
4ef015cd | 161 | |
09e6702a | 162 | |
d8f6d49f | 163 | void handleTCPClientWritable(int fd, FDMultiplexer::funcparam_t& var); |
09e6702a | 164 | |
50c81227 | 165 | // -1 is error, 0 is timeout, 1 is success |
5c633640 BH |
166 | int asendtcp(const string& data, Socket* sock) |
167 | { | |
168 | PacketID pident; | |
169 | pident.sock=sock; | |
170 | pident.outMSG=data; | |
23db0a09 | 171 | |
bb4bdbaf | 172 | t_fdm->addWriteFD(sock->getHandle(), handleTCPClientWritable, pident); |
50c81227 | 173 | string packet; |
5c633640 | 174 | |
5b0ddd18 | 175 | int ret=MT->waitEvent(pident, &packet, g_networkTimeoutMsec); |
23db0a09 | 176 | |
9170fbaf | 177 | if(!ret || ret==-1) { // timeout |
bb4bdbaf | 178 | t_fdm->removeWriteFD(sock->getHandle()); |
5c633640 | 179 | } |
50c81227 BH |
180 | else if(packet.size() !=data.size()) { // main loop tells us what it sent out, or empty in case of an error |
181 | return -1; | |
182 | } | |
9170fbaf | 183 | return ret; |
5c633640 BH |
184 | } |
185 | ||
d8f6d49f | 186 | void handleTCPClientReadable(int fd, FDMultiplexer::funcparam_t& var); |
09e6702a | 187 | |
9170fbaf | 188 | // -1 is error, 0 is timeout, 1 is success |
5c633640 | 189 | int arecvtcp(string& data, int len, Socket* sock) |
288f4aa9 | 190 | { |
50c81227 | 191 | data.clear(); |
5c633640 BH |
192 | PacketID pident; |
193 | pident.sock=sock; | |
194 | pident.inNeeded=len; | |
bb4bdbaf | 195 | t_fdm->addReadFD(sock->getHandle(), handleTCPClientReadable, pident); |
5c633640 | 196 | |
bb4bdbaf | 197 | int ret=MT->waitEvent(pident,&data, g_networkTimeoutMsec); |
9170fbaf | 198 | if(!ret || ret==-1) { // timeout |
bb4bdbaf | 199 | t_fdm->removeReadFD(sock->getHandle()); |
288f4aa9 | 200 | } |
50c81227 BH |
201 | else if(data.empty()) {// error, EOF or other |
202 | return -1; | |
203 | } | |
204 | ||
9170fbaf | 205 | return ret; |
288f4aa9 BH |
206 | } |
207 | ||
5a38281c | 208 | vector<ComboAddress> g_localQueryAddresses4, g_localQueryAddresses6; |
046c5a5d | 209 | const ComboAddress g_local4("0.0.0.0"), g_local6("::"); |
1652a63e | 210 | |
d7dae798 | 211 | //! pick a random query local address |
1652a63e | 212 | ComboAddress getQueryLocalAddress(int family, uint16_t port) |
5a38281c | 213 | { |
1652a63e | 214 | ComboAddress ret; |
5a38281c | 215 | if(family==AF_INET) { |
1652a63e BH |
216 | if(g_localQueryAddresses4.empty()) |
217 | ret = g_local4; | |
218 | else | |
219 | ret = g_localQueryAddresses4[dns_random(g_localQueryAddresses4.size())]; | |
220 | ret.sin4.sin_port = htons(port); | |
5a38281c BH |
221 | } |
222 | else { | |
223 | if(g_localQueryAddresses6.empty()) | |
1652a63e BH |
224 | ret = g_local6; |
225 | else | |
226 | ret = g_localQueryAddresses6[dns_random(g_localQueryAddresses6.size())]; | |
227 | ||
228 | ret.sin6.sin6_port = htons(port); | |
5a38281c | 229 | } |
1652a63e | 230 | return ret; |
5a38281c | 231 | } |
4ef015cd | 232 | |
d8f6d49f | 233 | void handleUDPServerResponse(int fd, FDMultiplexer::funcparam_t&); |
09e6702a | 234 | |
d7dae798 BH |
235 | void setSocketBuffer(int fd, int optname, uint32_t size) |
236 | { | |
237 | uint32_t psize=0; | |
238 | socklen_t len=sizeof(psize); | |
239 | ||
240 | if(!getsockopt(fd, SOL_SOCKET, optname, (char*)&psize, &len) && psize > size) { | |
241 | L<<Logger::Error<<"Not decreasing socket buffer size from "<<psize<<" to "<<size<<endl; | |
242 | return; | |
243 | } | |
244 | ||
245 | if (setsockopt(fd, SOL_SOCKET, optname, (char*)&size, sizeof(size)) < 0 ) | |
246 | L<<Logger::Error<<"Warning: unable to raise socket buffer size to "<<size<<": "<<strerror(errno)<<endl; | |
247 | } | |
248 | ||
249 | ||
250 | static void setSocketReceiveBuffer(int fd, uint32_t size) | |
251 | { | |
252 | setSocketBuffer(fd, SO_RCVBUF, size); | |
253 | } | |
254 | ||
255 | static void setSocketSendBuffer(int fd, uint32_t size) | |
256 | { | |
257 | setSocketBuffer(fd, SO_SNDBUF, size); | |
258 | } | |
259 | ||
260 | ||
4ef015cd BH |
261 | // you can ask this class for a UDP socket to send a query from |
262 | // this socket is not yours, don't even think about deleting it | |
263 | // but after you call 'returnSocket' on it, don't assume anything anymore | |
264 | class UDPClientSocks | |
265 | { | |
4ef015cd BH |
266 | unsigned int d_numsocks; |
267 | unsigned int d_maxsocks; | |
268 | public: | |
998a4334 | 269 | UDPClientSocks() : d_numsocks(0), d_maxsocks(5000) |
4ef015cd BH |
270 | { |
271 | } | |
272 | ||
996c89cc | 273 | typedef set<int> socks_t; |
4ef015cd BH |
274 | socks_t d_socks; |
275 | ||
d8f6d49f BH |
276 | // returning -1 means: temporary OS error (ie, out of files), -2 means OS error |
277 | int getSocket(const ComboAddress& toaddr, int* fd) | |
4ef015cd | 278 | { |
d8f6d49f BH |
279 | *fd=makeClientSocket(toaddr.sin4.sin_family); |
280 | if(*fd < 0) // temporary error - receive exception otherwise | |
281 | return -1; | |
282 | ||
283 | if(connect(*fd, (struct sockaddr*)(&toaddr), toaddr.getSocklen()) < 0) { | |
284 | int err = errno; | |
41ff43f8 BH |
285 | // returnSocket(*fd); |
286 | Utility::closesocket(*fd); | |
d8f6d49f | 287 | if(err==ENETUNREACH) // Seth "My Interfaces Are Like A Yo Yo" Arnold special |
4957a608 | 288 | return -2; |
998a4334 | 289 | return -1; |
d8f6d49f | 290 | } |
998a4334 | 291 | |
d8f6d49f | 292 | d_socks.insert(*fd); |
998a4334 | 293 | d_numsocks++; |
d8f6d49f | 294 | return 0; |
4ef015cd BH |
295 | } |
296 | ||
095c3045 BH |
297 | void returnSocket(int fd) |
298 | { | |
299 | socks_t::iterator i=d_socks.find(fd); | |
34801ab1 | 300 | if(i==d_socks.end()) { |
3f81d239 | 301 | throw PDNSException("Trying to return a socket (fd="+lexical_cast<string>(fd)+") not in the pool"); |
34801ab1 | 302 | } |
bb4bdbaf | 303 | returnSocketLocked(i); |
095c3045 BH |
304 | } |
305 | ||
4ef015cd | 306 | // return a socket to the pool, or simply erase it |
bb4bdbaf | 307 | void returnSocketLocked(socks_t::iterator& i) |
4ef015cd | 308 | { |
600fc20b | 309 | if(i==d_socks.end()) { |
3f81d239 | 310 | throw PDNSException("Trying to return a socket not in the pool"); |
600fc20b | 311 | } |
80baf329 | 312 | try { |
bb4bdbaf | 313 | t_fdm->removeReadFD(*i); |
80baf329 BH |
314 | } |
315 | catch(FDMultiplexerException& e) { | |
bb4bdbaf | 316 | // we sometimes return a socket that has not yet been assigned to t_fdm |
80baf329 | 317 | } |
c038218b | 318 | Utility::closesocket(*i); |
998a4334 BH |
319 | |
320 | d_socks.erase(i++); | |
321 | --d_numsocks; | |
4ef015cd | 322 | } |
d8f6d49f BH |
323 | |
324 | // returns -1 for errors which might go away, throws for ones that won't | |
bb4bdbaf | 325 | static int makeClientSocket(int family) |
d8f6d49f BH |
326 | { |
327 | int ret=(int)socket(family, SOCK_DGRAM, 0); | |
42c235e5 | 328 | |
d8f6d49f BH |
329 | if(ret < 0 && errno==EMFILE) // this is not a catastrophic error |
330 | return ret; | |
331 | ||
332 | if(ret<0) | |
3f81d239 | 333 | throw PDNSException("Making a socket for resolver (family = "+lexical_cast<string>(family)+"): "+stringerror()); |
36855b53 BH |
334 | |
335 | Utility::setCloseOnExec(ret); | |
5a38281c | 336 | |
d8f6d49f BH |
337 | int tries=10; |
338 | while(--tries) { | |
1652a63e BH |
339 | uint16_t port; |
340 | ||
d8f6d49f | 341 | if(tries==1) // fall back to kernel 'random' |
4957a608 | 342 | port = 0; |
1652a63e BH |
343 | else |
344 | port = 1025 + dns_random(64510); | |
345 | ||
346 | ComboAddress sin=getQueryLocalAddress(family, port); // does htons for us | |
5a38281c | 347 | |
5a38281c | 348 | if (::bind(ret, (struct sockaddr *)&sin, sin.getSocklen()) >= 0) |
4957a608 | 349 | break; |
d8f6d49f BH |
350 | } |
351 | if(!tries) | |
3f81d239 | 352 | throw PDNSException("Resolver binding to local query client socket: "+stringerror()); |
d8f6d49f BH |
353 | |
354 | Utility::setNonBlocking(ret); | |
355 | return ret; | |
356 | } | |
49a699c4 BH |
357 | }; |
358 | ||
359 | static __thread UDPClientSocks* t_udpclientsocks; | |
4ef015cd | 360 | |
288f4aa9 | 361 | /* these two functions are used by LWRes */ |
34801ab1 | 362 | // -2 is OS error, -1 is error that depends on the remote, > 0 is success |
787e5eab | 363 | int asendto(const char *data, int len, int flags, |
4957a608 | 364 | const ComboAddress& toaddr, uint16_t id, const string& domain, uint16_t qtype, int* fd) |
288f4aa9 | 365 | { |
34801ab1 BH |
366 | |
367 | PacketID pident; | |
787e5eab BH |
368 | pident.domain = domain; |
369 | pident.remote = toaddr; | |
370 | pident.type = qtype; | |
34801ab1 BH |
371 | |
372 | // see if there is an existing outstanding request we can chain on to, using partial equivalence function | |
373 | pair<MT_t::waiters_t::iterator, MT_t::waiters_t::iterator> chain=MT->d_waiters.equal_range(pident, PacketIDBirthdayCompare()); | |
374 | ||
375 | for(; chain.first != chain.second; chain.first++) { | |
376 | if(chain.first->key.fd > -1) { // don't chain onto existing chained waiter! | |
e27e91a8 | 377 | /* |
4665c31e BH |
378 | cerr<<"Orig: "<<pident.domain<<", "<<pident.remote.toString()<<", id="<<id<<endl; |
379 | cerr<<"Had hit: "<< chain.first->key.domain<<", "<<chain.first->key.remote.toString()<<", id="<<chain.first->key.id | |
4957a608 | 380 | <<", count="<<chain.first->key.chain.size()<<", origfd: "<<chain.first->key.fd<<endl; |
e27e91a8 | 381 | */ |
34801ab1 BH |
382 | chain.first->key.chain.insert(id); // we can chain |
383 | *fd=-1; // gets used in waitEvent / sendEvent later on | |
384 | return 1; | |
385 | } | |
386 | } | |
387 | ||
49a699c4 | 388 | int ret=t_udpclientsocks->getSocket(toaddr, fd); |
d8f6d49f BH |
389 | if(ret < 0) |
390 | return ret; | |
34801ab1 | 391 | |
998a4334 BH |
392 | pident.fd=*fd; |
393 | pident.id=id; | |
998a4334 | 394 | |
bb4bdbaf BH |
395 | t_fdm->addReadFD(*fd, handleUDPServerResponse, pident); |
396 | ret = send(*fd, data, len, 0); | |
397 | ||
5b0ddd18 | 398 | int tmp = errno; |
bb4bdbaf | 399 | |
7302ed0a | 400 | if(ret < 0) |
49a699c4 | 401 | t_udpclientsocks->returnSocket(*fd); |
bb4bdbaf | 402 | |
5b0ddd18 | 403 | errno = tmp; // this is for logging purposes only |
7302ed0a | 404 | return ret; |
288f4aa9 BH |
405 | } |
406 | ||
9170fbaf | 407 | // -1 is error, 0 is timeout, 1 is success |
787e5eab | 408 | int arecvfrom(char *data, int len, int flags, const ComboAddress& fromaddr, int *d_len, |
4957a608 | 409 | uint16_t id, const string& domain, uint16_t qtype, int fd, struct timeval* now) |
288f4aa9 | 410 | { |
0d5f0a9f BH |
411 | static optional<unsigned int> nearMissLimit; |
412 | if(!nearMissLimit) | |
413 | nearMissLimit=::arg().asNum("spoof-nearmiss-max"); | |
414 | ||
288f4aa9 | 415 | PacketID pident; |
4ef015cd | 416 | pident.fd=fd; |
288f4aa9 | 417 | pident.id=id; |
0d5f0a9f | 418 | pident.domain=domain; |
787e5eab | 419 | pident.type = qtype; |
996c89cc | 420 | pident.remote=fromaddr; |
b636533b | 421 | |
288f4aa9 | 422 | string packet; |
5b0ddd18 | 423 | int ret=MT->waitEvent(pident, &packet, g_networkTimeoutMsec, now); |
34801ab1 | 424 | |
9170fbaf | 425 | if(ret > 0) { |
996c89cc | 426 | if(packet.empty()) // means "error" |
998a4334 | 427 | return -1; |
998a4334 | 428 | |
705f31ae | 429 | *d_len=(int)packet.size(); |
9170fbaf | 430 | memcpy(data,packet.c_str(),min(len,*d_len)); |
0d5f0a9f | 431 | if(*nearMissLimit && pident.nearMisses > *nearMissLimit) { |
996c89cc | 432 | L<<Logger::Error<<"Too many ("<<pident.nearMisses<<" > "<<*nearMissLimit<<") bogus answers for '"<<domain<<"' from "<<fromaddr.toString()<<", assuming spoof attempt."<<endl; |
0d5f0a9f | 433 | g_stats.spoofCount++; |
35ce8576 BH |
434 | return -1; |
435 | } | |
288f4aa9 | 436 | } |
09e6702a | 437 | else { |
34801ab1 | 438 | if(fd >= 0) |
49a699c4 | 439 | t_udpclientsocks->returnSocket(fd); |
09e6702a | 440 | } |
9170fbaf | 441 | return ret; |
288f4aa9 BH |
442 | } |
443 | ||
aa4e4cbf | 444 | |
87a5ea63 | 445 | string s_pidfname; |
88def049 BH |
446 | static void writePid(void) |
447 | { | |
18e7758c | 448 | ofstream of(s_pidfname.c_str(), std::ios_base::app); |
88def049 | 449 | if(of) |
705f31ae | 450 | of<< Utility::getpid() <<endl; |
88def049 | 451 | else |
87a5ea63 | 452 | L<<Logger::Error<<"Requested to write pid for "<<Utility::getpid()<<" to "<<s_pidfname<<" failed: "<<strerror(errno)<<endl; |
88def049 BH |
453 | } |
454 | ||
bd0289fc BH |
455 | typedef map<ComboAddress, uint32_t, ComboAddress::addressOnlyLessThan> tcpClientCounts_t; |
456 | tcpClientCounts_t __thread* t_tcpClientCounts; | |
0e9d9ce2 | 457 | |
cd989c87 BH |
458 | TCPConnection::TCPConnection(int fd, const ComboAddress& addr) : d_remote(addr), d_fd(fd) |
459 | { | |
1bc9e6bd | 460 | ++s_currentConnections; |
cd989c87 | 461 | (*t_tcpClientCounts)[d_remote]++; |
0e408828 | 462 | } |
cd989c87 BH |
463 | |
464 | TCPConnection::~TCPConnection() | |
0e408828 | 465 | { |
cd989c87 BH |
466 | if(Utility::closesocket(d_fd) < 0) |
467 | unixDie("closing socket for TCPConnection"); | |
468 | if(t_tcpClientCounts->count(d_remote) && !(*t_tcpClientCounts)[d_remote]--) | |
469 | t_tcpClientCounts->erase(d_remote); | |
1bc9e6bd | 470 | --s_currentConnections; |
0e408828 | 471 | } |
0e9d9ce2 | 472 | |
1bc9e6bd | 473 | AtomicCounter TCPConnection::s_currentConnections; |
d8f6d49f | 474 | void handleRunningTCPQuestion(int fd, FDMultiplexer::funcparam_t& var); |
6dcd28c3 | 475 | |
2cc13433 BH |
476 | void updateRcodeStats(int res) |
477 | { | |
478 | switch(res) { | |
479 | case RCode::ServFail: | |
480 | g_stats.servFails++; | |
481 | break; | |
482 | case RCode::NXDomain: | |
483 | g_stats.nxDomains++; | |
484 | break; | |
485 | case RCode::NoError: | |
486 | g_stats.noErrors++; | |
487 | break; | |
488 | } | |
489 | } | |
490 | ||
288f4aa9 BH |
491 | void startDoResolve(void *p) |
492 | { | |
7b1469bb | 493 | DNSComboWriter* dc=(DNSComboWriter *)p; |
0fb1501b | 494 | string loginfo=""; |
b23b8614 | 495 | |
288f4aa9 | 496 | try { |
0fb1501b PD |
497 | loginfo=" (while setting loginfo)"; |
498 | loginfo=" ("+dc->d_mdp.d_qname+"/"+lexical_cast<string>(dc->d_mdp.d_qtype)+" from "+(dc->d_remote.toString())+")"; | |
dffbaa08 | 499 | uint32_t maxanswersize= dc->d_tcp ? 65535 : 512; |
7f7b8d55 BH |
500 | EDNSOpts edo; |
501 | if(getEDNSOpts(dc->d_mdp, &edo)) { | |
a09a8ce0 | 502 | maxanswersize = min(edo.d_packetsize, (uint16_t) (dc->d_tcp ? 65535 : g_udpTruncationThreshold)); |
10321a98 | 503 | } |
09e6702a | 504 | |
ea634573 | 505 | vector<DNSResourceRecord> ret; |
ea634573 | 506 | vector<uint8_t> packet; |
b23b8614 BH |
507 | |
508 | DNSPacketWriter pw(packet, dc->d_mdp.d_qname, dc->d_mdp.d_qtype, dc->d_mdp.d_qclass); | |
ea634573 BH |
509 | |
510 | pw.getHeader()->aa=0; | |
511 | pw.getHeader()->ra=1; | |
c154c8a4 | 512 | pw.getHeader()->qr=1; |
bb4bdbaf | 513 | pw.getHeader()->tc=0; |
ea634573 | 514 | pw.getHeader()->id=dc->d_mdp.d_header.id; |
10321a98 | 515 | pw.getHeader()->rd=dc->d_mdp.d_header.rd; |
ea634573 | 516 | |
904d3219 PD |
517 | uint32_t minTTL=std::numeric_limits<uint32_t>::max(); |
518 | ||
519 | SyncRes sr(dc->d_now); | |
520 | bool tracedQuery=false; // we could consider letting Lua know about this too | |
521 | bool variableAnswer = false; | |
522 | ||
e661a20b PD |
523 | if(dc->d_mdp.d_qtype==QType::ANY && !dc->d_tcp && g_anyToTcp) { |
524 | pw.getHeader()->tc=1; | |
525 | goto sendit; | |
526 | } | |
527 | ||
77499b05 BH |
528 | if(t_traceRegex->get() && (*t_traceRegex)->match(dc->d_mdp.d_qname)) { |
529 | sr.setLogMode(SyncRes::Store); | |
530 | tracedQuery=true; | |
531 | } | |
532 | ||
533 | if(!g_quiet || tracedQuery) | |
534 | L<<Logger::Warning<<t_id<<" ["<<MT->getTid()<<"] " << (dc->d_tcp ? "TCP " : "") << "question for '"<<dc->d_mdp.d_qname<<"|" | |
8a63d3ce | 535 | <<DNSRecordContent::NumberToType(dc->d_mdp.d_qtype)<<"' from "<<dc->getRemote()<<endl; |
c75a6a9e | 536 | |
fededf47 | 537 | sr.setId(MT->getTid()); |
67828389 | 538 | if(!dc->d_mdp.d_header.rd) |
c836dc19 BH |
539 | sr.setCacheOnly(); |
540 | ||
4485aa35 BH |
541 | int res; |
542 | ||
5704e107 | 543 | // if there is a RecursorLua active, and it 'took' the query in preResolve, we don't launch beginResolve |
99c69ed3 | 544 | if(!t_pdl->get() || !(*t_pdl)->preresolve(dc->d_remote, g_listenSocketsAddresses[dc->d_socket], dc->d_mdp.d_qname, QType(dc->d_mdp.d_qtype), ret, res, &variableAnswer)) { |
4485aa35 BH |
545 | res = sr.beginResolve(dc->d_mdp.d_qname, QType(dc->d_mdp.d_qtype), dc->d_mdp.d_qclass, ret); |
546 | ||
674cf0f6 | 547 | if(t_pdl->get()) { |
bd53ea9d | 548 | if(res == RCode::NoError) { |
232f0877 CH |
549 | vector<DNSResourceRecord>::const_iterator i; |
550 | for(i=ret.begin(); i!=ret.end(); ++i) | |
551 | if(i->qtype.getCode() == dc->d_mdp.d_qtype && i->d_place == DNSResourceRecord::ANSWER) | |
552 | break; | |
553 | if(i == ret.end()) | |
554 | (*t_pdl)->nodata(dc->d_remote, g_listenSocketsAddresses[dc->d_socket], dc->d_mdp.d_qname, QType(dc->d_mdp.d_qtype), ret, res, &variableAnswer); | |
555 | } | |
556 | else if(res == RCode::NXDomain) | |
99c69ed3 | 557 | (*t_pdl)->nxdomain(dc->d_remote, g_listenSocketsAddresses[dc->d_socket], dc->d_mdp.d_qname, QType(dc->d_mdp.d_qtype), ret, res, &variableAnswer); |
bd53ea9d PD |
558 | |
559 | (*t_pdl)->postresolve(dc->d_remote, g_listenSocketsAddresses[dc->d_socket], dc->d_mdp.d_qname, QType(dc->d_mdp.d_qtype), ret, res, &variableAnswer); | |
d2322a5e | 560 | } |
4485aa35 | 561 | } |
99c69ed3 | 562 | |
77499b05 | 563 | |
0fe1d080 | 564 | if(tracedQuery || res < 0 || res == RCode::ServFail || pw.getHeader()->rcode == RCode::ServFail) |
85ffbc53 | 565 | { |
85ffbc53 PD |
566 | string trace(sr.getTrace()); |
567 | if(!trace.empty()) { | |
568 | vector<string> lines; | |
569 | boost::split(lines, trace, boost::is_any_of("\n")); | |
570 | BOOST_FOREACH(const string& line, lines) { | |
571 | if(!line.empty()) | |
572 | L<<Logger::Warning<< line << endl; | |
573 | } | |
574 | } | |
575 | } | |
0fe1d080 PD |
576 | |
577 | if(res < 0) { | |
578 | pw.getHeader()->rcode=RCode::ServFail; | |
579 | // no commit here, because no record | |
580 | g_stats.servFails++; | |
581 | } | |
288f4aa9 | 582 | else { |
ea634573 | 583 | pw.getHeader()->rcode=res; |
2cc13433 | 584 | updateRcodeStats(res); |
77499b05 | 585 | |
c154c8a4 | 586 | if(ret.size()) { |
92476c8b | 587 | orderAndShuffle(ret); |
4957a608 | 588 | |
4957a608 BH |
589 | for(vector<DNSResourceRecord>::const_iterator i=ret.begin(); i!=ret.end(); ++i) { |
590 | pw.startRecord(i->qname, i->qtype.getCode(), i->ttl, i->qclass, (DNSPacketWriter::Place)i->d_place); | |
591 | minTTL = min(minTTL, i->ttl); | |
592 | if(i->qtype.getCode() == QType::A) { // blast out A record w/o doing whole dnswriter thing | |
593 | uint32_t ip=0; | |
594 | IpToU32(i->content, &ip); | |
595 | pw.xfr32BitInt(htonl(ip)); | |
596 | } else { | |
597 | shared_ptr<DNSRecordContent> drc(DNSRecordContent::mastermake(i->qtype.getCode(), i->qclass, i->content)); | |
598 | drc->toPacket(pw); | |
599 | } | |
dffbaa08 | 600 | if(pw.size() > maxanswersize) { |
4957a608 BH |
601 | pw.rollback(); |
602 | if(i->d_place==DNSResourceRecord::ANSWER) // only truncate if we actually omitted parts of the answer | |
add935a2 | 603 | { |
4957a608 | 604 | pw.getHeader()->tc=1; |
add935a2 PD |
605 | pw.truncate(); |
606 | } | |
4957a608 BH |
607 | goto sendit; // need to jump over pw.commit |
608 | } | |
609 | } | |
b23b8614 | 610 | |
18af64a8 | 611 | pw.commit(); |
ea634573 | 612 | } |
288f4aa9 | 613 | } |
10321a98 | 614 | sendit:; |
ea634573 | 615 | if(!dc->d_tcp) { |
c038218b | 616 | sendto(dc->d_socket, (const char*)&*packet.begin(), packet.size(), 0, (struct sockaddr *)(&dc->d_remote), dc->d_remote.getSocklen()); |
99c69ed3 | 617 | if(!SyncRes::s_nopacketcache && !variableAnswer ) { |
49a699c4 | 618 | t_packetCache->insertResponsePacket(string((const char*)&*packet.begin(), packet.size()), g_now.tv_sec, |
232f0877 CH |
619 | min(minTTL, |
620 | (pw.getHeader()->rcode == RCode::ServFail) ? SyncRes::s_packetcacheservfailttl : SyncRes::s_packetcachettl | |
621 | ) | |
622 | ); | |
1051f8a9 | 623 | } |
feccc9fc | 624 | } |
9c495589 BH |
625 | else { |
626 | char buf[2]; | |
ea634573 BH |
627 | buf[0]=packet.size()/256; |
628 | buf[1]=packet.size()%256; | |
feccc9fc | 629 | |
c038218b | 630 | Utility::iovec iov[2]; |
feccc9fc | 631 | |
ea634573 BH |
632 | iov[0].iov_base=(void*)buf; iov[0].iov_len=2; |
633 | iov[1].iov_base=(void*)&*packet.begin(); iov[1].iov_len = packet.size(); | |
feccc9fc | 634 | |
c038218b | 635 | int ret=Utility::writev(dc->d_socket, iov, 2); |
0e9d9ce2 | 636 | bool hadError=true; |
feccc9fc | 637 | |
0e9d9ce2 | 638 | if(ret == 0) |
18af64a8 | 639 | L<<Logger::Error<<"EOF writing TCP answer to "<<dc->getRemote()<<endl; |
0e9d9ce2 | 640 | else if(ret < 0 ) |
18af64a8 | 641 | L<<Logger::Error<<"Error writing TCP answer to "<<dc->getRemote()<<": "<< strerror(errno) <<endl; |
ea634573 | 642 | else if((unsigned int)ret != 2 + packet.size()) |
18af64a8 | 643 | L<<Logger::Error<<"Oops, partial answer sent to "<<dc->getRemote()<<" for "<<dc->d_mdp.d_qname<<" (size="<< (2 + packet.size()) <<", sent "<<ret<<")"<<endl; |
0e9d9ce2 | 644 | else |
18af64a8 | 645 | hadError=false; |
09e6702a BH |
646 | |
647 | // update tcp connection status, either by closing or moving to 'BYTE0' | |
18af64a8 | 648 | |
09e6702a | 649 | if(hadError) { |
18af64a8 | 650 | // no need to remove us from FDM, we weren't there |
c36bc97a | 651 | dc->d_socket = -1; |
09e6702a | 652 | } |
a6ae6414 | 653 | else { |
cd989c87 | 654 | dc->d_tcpConnection->state=TCPConnection::BYTE0; |
18af64a8 | 655 | Utility::gettimeofday(&g_now, 0); // needs to be updated |
cd989c87 BH |
656 | t_fdm->addReadFD(dc->d_socket, handleRunningTCPQuestion, dc->d_tcpConnection); |
657 | t_fdm->setReadTTD(dc->d_socket, g_now, g_tcpTimeout); | |
0e9d9ce2 | 658 | } |
9c495589 | 659 | } |
b23b8614 | 660 | |
1d5b3ce6 | 661 | if(!g_quiet) { |
bb4bdbaf | 662 | 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 | 663 | L<<"': "<<ntohs(pw.getHeader()->ancount)<<" answers, "<<ntohs(pw.getHeader()->arcount)<<" additional, took "<<sr.d_outqueries<<" packets, "<< |
18af64a8 | 664 | sr.d_throttledqueries<<" throttled, "<<sr.d_timeouts<<" timeouts, "<<sr.d_tcpoutqueries<<" tcp connections, rcode="<<res<<endl; |
c75a6a9e | 665 | } |
b23b8614 | 666 | |
49a699c4 | 667 | sr.d_outqueries ? t_RC->cacheMisses++ : t_RC->cacheHits++; |
fe213470 BH |
668 | float spent=makeFloat(sr.d_now-dc->d_now); |
669 | if(spent < 0.001) | |
670 | g_stats.answers0_1++; | |
671 | else if(spent < 0.010) | |
672 | g_stats.answers1_10++; | |
673 | else if(spent < 0.1) | |
674 | g_stats.answers10_100++; | |
675 | else if(spent < 1.0) | |
676 | g_stats.answers100_1000++; | |
677 | else | |
678 | g_stats.answersSlow++; | |
679 | ||
574af7ea | 680 | uint64_t newLat=(uint64_t)(spent*1000000); |
87b8e43a BH |
681 | if(newLat < 1000000) // outliers of several minutes exist.. |
682 | g_stats.avgLatencyUsec=(uint64_t)((1-0.0001)*g_stats.avgLatencyUsec + 0.0001*newLat); | |
b23b8614 | 683 | |
ea634573 | 684 | delete dc; |
c36bc97a | 685 | dc=0; |
288f4aa9 | 686 | } |
3f81d239 | 687 | catch(PDNSException &ae) { |
0fb1501b | 688 | L<<Logger::Error<<"startDoResolve problem"<<loginfo<<": "<<ae.reason<<endl; |
c36bc97a | 689 | delete dc; |
288f4aa9 | 690 | } |
7b1469bb | 691 | catch(MOADNSException& e) { |
0fb1501b | 692 | L<<Logger::Error<<"DNS parser error"<<loginfo<<": "<<dc->d_mdp.d_qname<<", "<<e.what()<<endl; |
c36bc97a | 693 | delete dc; |
7b1469bb | 694 | } |
fdbf35ac | 695 | catch(std::exception& e) { |
0fb1501b | 696 | L<<Logger::Error<<"STL error"<<loginfo<<": "<<e.what()<<endl; |
c36bc97a | 697 | delete dc; |
c154c8a4 | 698 | } |
288f4aa9 | 699 | catch(...) { |
0fb1501b | 700 | L<<Logger::Error<<"Any other exception in a resolver context"<<loginfo<<endl; |
288f4aa9 | 701 | } |
ec6eacbc BH |
702 | |
703 | g_stats.maxMThreadStackUsage = max(MT->getMaxStackUsage(), g_stats.maxMThreadStackUsage); | |
288f4aa9 BH |
704 | } |
705 | ||
677e2a46 | 706 | void makeControlChannelSocket(int processNum=-1) |
1d5b3ce6 | 707 | { |
19e570d2 | 708 | string sockname=::arg()["socket-dir"]+"/pdns_"+s_programname; |
677e2a46 BH |
709 | if(processNum >= 0) |
710 | sockname += "."+lexical_cast<string>(processNum); | |
711 | sockname+=".controlsocket"; | |
41f7a068 | 712 | s_rcc.listen(sockname); |
387de317 | 713 | |
387de317 BH |
714 | int sockowner = -1; |
715 | int sockgroup = -1; | |
716 | ||
717 | if (!::arg().isEmpty("socket-group")) | |
718 | sockgroup=::arg().asGid("socket-group"); | |
719 | if (!::arg().isEmpty("socket-owner")) | |
720 | sockowner=::arg().asUid("socket-owner"); | |
721 | ||
f838ad8d BH |
722 | if (sockgroup > -1 || sockowner > -1) { |
723 | if(chown(sockname.c_str(), sockowner, sockgroup) < 0) { | |
724 | unixDie("Failed to chown control socket"); | |
725 | } | |
726 | } | |
387de317 BH |
727 | |
728 | // do mode change if socket-mode is given | |
729 | if(!::arg().isEmpty("socket-mode")) { | |
730 | mode_t sockmode=::arg().asMode("socket-mode"); | |
731 | chmod(sockname.c_str(), sockmode); | |
732 | } | |
1d5b3ce6 BH |
733 | } |
734 | ||
d8f6d49f | 735 | void handleRunningTCPQuestion(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 736 | { |
cd989c87 | 737 | shared_ptr<TCPConnection> conn=any_cast<shared_ptr<TCPConnection> >(var); |
c038218b | 738 | |
879b3f70 | 739 | if(conn->state==TCPConnection::BYTE0) { |
cd989c87 | 740 | int bytes=recv(conn->getFD(), conn->data, 2, 0); |
09e6702a | 741 | if(bytes==1) |
667f7e60 | 742 | conn->state=TCPConnection::BYTE1; |
09e6702a | 743 | if(bytes==2) { |
a0aa4f64 | 744 | conn->qlen=(((unsigned char)conn->data[0]) << 8)+ (unsigned char)conn->data[1]; |
667f7e60 BH |
745 | conn->bytesread=0; |
746 | conn->state=TCPConnection::GETQUESTION; | |
09e6702a BH |
747 | } |
748 | if(!bytes || bytes < 0) { | |
bb4bdbaf | 749 | t_fdm->removeReadFD(fd); |
09e6702a BH |
750 | return; |
751 | } | |
752 | } | |
667f7e60 | 753 | else if(conn->state==TCPConnection::BYTE1) { |
cd989c87 | 754 | int bytes=recv(conn->getFD(), conn->data+1, 1, 0); |
09e6702a | 755 | if(bytes==1) { |
667f7e60 | 756 | conn->state=TCPConnection::GETQUESTION; |
a0aa4f64 | 757 | conn->qlen=(((unsigned char)conn->data[0]) << 8)+ (unsigned char)conn->data[1]; |
667f7e60 | 758 | conn->bytesread=0; |
09e6702a BH |
759 | } |
760 | if(!bytes || bytes < 0) { | |
761 | if(g_logCommonErrors) | |
cd989c87 | 762 | L<<Logger::Error<<"TCP client "<< conn->d_remote.toString() <<" disconnected after first byte"<<endl; |
bb4bdbaf | 763 | t_fdm->removeReadFD(fd); |
09e6702a BH |
764 | return; |
765 | } | |
766 | } | |
667f7e60 | 767 | else if(conn->state==TCPConnection::GETQUESTION) { |
cd989c87 | 768 | int bytes=recv(conn->getFD(), conn->data + conn->bytesread, conn->qlen - conn->bytesread, 0); |
09e6702a | 769 | if(!bytes || bytes < 0) { |
cd989c87 | 770 | L<<Logger::Error<<"TCP client "<< conn->d_remote.toString() <<" disconnected while reading question body"<<endl; |
bb4bdbaf | 771 | t_fdm->removeReadFD(fd); |
09e6702a BH |
772 | return; |
773 | } | |
667f7e60 BH |
774 | conn->bytesread+=bytes; |
775 | if(conn->bytesread==conn->qlen) { | |
bb4bdbaf | 776 | t_fdm->removeReadFD(fd); // should no longer awake ourselves when there is data to read |
879b3f70 | 777 | |
09e6702a BH |
778 | DNSComboWriter* dc=0; |
779 | try { | |
cd989c87 | 780 | dc=new DNSComboWriter(conn->data, conn->qlen, g_now); |
09e6702a BH |
781 | } |
782 | catch(MOADNSException &mde) { | |
4957a608 BH |
783 | g_stats.clientParseError++; |
784 | if(g_logCommonErrors) | |
cd989c87 | 785 | L<<Logger::Error<<"Unable to parse packet from TCP client "<< conn->d_remote.toString() <<endl; |
4957a608 | 786 | return; |
09e6702a | 787 | } |
cd989c87 BH |
788 | dc->d_tcpConnection = conn; // carry the torch |
789 | dc->setSocket(conn->getFD()); // this is the only time a copy is made of the actual fd | |
09e6702a | 790 | dc->d_tcp=true; |
cd989c87 | 791 | dc->setRemote(&conn->d_remote); |
879b3f70 | 792 | if(dc->d_mdp.d_header.qr) { |
4957a608 BH |
793 | delete dc; |
794 | L<<Logger::Error<<"Ignoring answer on server socket!"<<endl; | |
4957a608 | 795 | return; |
879b3f70 | 796 | } |
3abcdab2 PD |
797 | if(dc->d_mdp.d_header.opcode) { |
798 | delete dc; | |
799 | L<<Logger::Error<<"Ignoring non-query opcode on server socket!"<<endl; | |
800 | return; | |
801 | } | |
09e6702a | 802 | else { |
4957a608 BH |
803 | ++g_stats.qcounter; |
804 | ++g_stats.tcpqcounter; | |
50a5ef72 | 805 | MT->makeThread(startDoResolve, dc); // deletes dc, will set state to BYTE0 again |
4957a608 | 806 | return; |
09e6702a BH |
807 | } |
808 | } | |
809 | } | |
810 | } | |
811 | ||
6dcd28c3 | 812 | //! Handle new incoming TCP connection |
d8f6d49f | 813 | void handleNewTCPQuestion(int fd, FDMultiplexer::funcparam_t& ) |
09e6702a | 814 | { |
37d3f960 | 815 | ComboAddress addr; |
09e6702a | 816 | socklen_t addrlen=sizeof(addr); |
705f31ae | 817 | int newsock=(int)accept(fd, (struct sockaddr*)&addr, &addrlen); |
09e6702a | 818 | if(newsock>0) { |
85c32340 BH |
819 | if(MT->numProcesses() > g_maxMThreads) { |
820 | g_stats.overCapacityDrops++; | |
821 | Utility::closesocket(newsock); | |
822 | return; | |
823 | } | |
824 | ||
b3b5459d | 825 | t_remotes->addRemote(addr); |
49a699c4 | 826 | if(t_allowFrom && !t_allowFrom->match(&addr)) { |
2914b022 | 827 | if(!g_quiet) |
4957a608 | 828 | L<<Logger::Error<<"["<<MT->getTid()<<"] dropping TCP query from "<<addr.toString()<<", address not matched by allow-from"<<endl; |
2914b022 | 829 | |
09e6702a | 830 | g_stats.unauthorizedTCP++; |
705f31ae | 831 | Utility::closesocket(newsock); |
09e6702a BH |
832 | return; |
833 | } | |
bd0289fc | 834 | if(g_maxTCPPerClient && t_tcpClientCounts->count(addr) && (*t_tcpClientCounts)[addr] >= g_maxTCPPerClient) { |
09e6702a | 835 | g_stats.tcpClientOverflow++; |
705f31ae | 836 | Utility::closesocket(newsock); // don't call TCPConnection::closeAndCleanup here - did not enter it in the counts yet! |
09e6702a BH |
837 | return; |
838 | } | |
cd989c87 | 839 | |
09e6702a | 840 | Utility::setNonBlocking(newsock); |
cd989c87 BH |
841 | shared_ptr<TCPConnection> tc(new TCPConnection(newsock, addr)); |
842 | tc->state=TCPConnection::BYTE0; | |
843 | ||
844 | t_fdm->addReadFD(tc->getFD(), handleRunningTCPQuestion, tc); | |
c038218b | 845 | |
0bff046b | 846 | struct timeval now; |
c038218b | 847 | Utility::gettimeofday(&now, 0); |
cd989c87 | 848 | t_fdm->setReadTTD(tc->getFD(), now, g_tcpTimeout); |
09e6702a BH |
849 | } |
850 | } | |
2914b022 | 851 | |
1bc3c142 BH |
852 | string* doProcessUDPQuestion(const std::string& question, const ComboAddress& fromaddr, int fd) |
853 | { | |
854 | ++g_stats.qcounter; | |
d7f10541 BH |
855 | if(fromaddr.sin4.sin_family==AF_INET6) |
856 | g_stats.ipv6qcounter++; | |
1bc3c142 BH |
857 | |
858 | string response; | |
859 | try { | |
860 | uint32_t age; | |
861 | if(!SyncRes::s_nopacketcache && t_packetCache->getResponsePacket(question, g_now.tv_sec, &response, &age)) { | |
862 | if(!g_quiet) | |
232f0877 | 863 | L<<Logger::Error<<t_id<< " question answered from packet cache from "<<fromaddr.toString()<<endl; |
1bc3c142 BH |
864 | |
865 | g_stats.packetCacheHits++; | |
866 | SyncRes::s_queries++; | |
867 | ageDNSPacket(response, age); | |
868 | sendto(fd, response.c_str(), response.length(), 0, (struct sockaddr*) &fromaddr, fromaddr.getSocklen()); | |
97bee66d BH |
869 | if(response.length() >= sizeof(struct dnsheader)) { |
870 | struct dnsheader dh; | |
871 | memcpy(&dh, response.c_str(), sizeof(dh)); | |
872 | updateRcodeStats(dh.rcode); | |
873 | } | |
1bc3c142 BH |
874 | g_stats.avgLatencyUsec=(uint64_t)((1-0.0001)*g_stats.avgLatencyUsec + 0); // we assume 0 usec |
875 | return 0; | |
876 | } | |
877 | } | |
878 | catch(std::exception& e) { | |
879 | L<<Logger::Error<<"Error processing or aging answer packet: "<<e.what()<<endl; | |
880 | return 0; | |
881 | } | |
882 | ||
883 | ||
884 | if(MT->numProcesses() > g_maxMThreads) { | |
885 | g_stats.overCapacityDrops++; | |
886 | return 0; | |
887 | } | |
888 | ||
889 | DNSComboWriter* dc = new DNSComboWriter(question.c_str(), question.size(), g_now); | |
890 | dc->setSocket(fd); | |
891 | dc->setRemote(&fromaddr); | |
892 | ||
893 | dc->d_tcp=false; | |
894 | MT->makeThread(startDoResolve, (void*) dc); // deletes dc | |
895 | return 0; | |
896 | } | |
897 | ||
d8f6d49f | 898 | void handleNewUDPQuestion(int fd, FDMultiplexer::funcparam_t& var) |
5db529f8 | 899 | { |
a9af3782 | 900 | int len; |
5db529f8 BH |
901 | char data[1500]; |
902 | ComboAddress fromaddr; | |
903 | socklen_t addrlen=sizeof(fromaddr); | |
85c32340 | 904 | |
a9af3782 | 905 | if((len=recvfrom(fd, data, sizeof(data), 0, (sockaddr *)&fromaddr, &addrlen)) >= 0) { |
b3b5459d | 906 | t_remotes->addRemote(fromaddr); |
b23b8614 | 907 | |
49a699c4 | 908 | if(t_allowFrom && !t_allowFrom->match(&fromaddr)) { |
2914b022 | 909 | if(!g_quiet) |
4957a608 | 910 | L<<Logger::Error<<"["<<MT->getTid()<<"] dropping UDP query from "<<fromaddr.toString()<<", address not matched by allow-from"<<endl; |
2914b022 | 911 | |
5db529f8 | 912 | g_stats.unauthorizedUDP++; |
a9af3782 | 913 | return; |
5db529f8 | 914 | } |
5db529f8 | 915 | try { |
b23b8614 | 916 | dnsheader* dh=(dnsheader*)data; |
5db529f8 | 917 | |
b23b8614 | 918 | if(dh->qr) { |
4957a608 BH |
919 | if(g_logCommonErrors) |
920 | L<<Logger::Error<<"Ignoring answer from "<<fromaddr.toString()<<" on server socket!"<<endl; | |
5db529f8 | 921 | } |
3abcdab2 PD |
922 | else if(dh->opcode) { |
923 | if(g_logCommonErrors) | |
924 | L<<Logger::Error<<"Ignoring non-query opcode "<<dh->opcode<<" from "<<fromaddr.toString()<<" on server socket!"<<endl; | |
925 | } | |
5db529f8 | 926 | else { |
232f0877 CH |
927 | string question(data, len); |
928 | if(g_weDistributeQueries) | |
929 | distributeAsyncFunction(boost::bind(doProcessUDPQuestion, question, fromaddr, fd)); | |
930 | else | |
931 | doProcessUDPQuestion(question, fromaddr, fd); | |
5db529f8 BH |
932 | } |
933 | } | |
934 | catch(MOADNSException& mde) { | |
935 | g_stats.clientParseError++; | |
84e66a59 | 936 | if(g_logCommonErrors) |
4957a608 | 937 | L<<Logger::Error<<"Unable to parse packet from remote UDP client "<<fromaddr.toString() <<": "<<mde.what()<<endl; |
5db529f8 BH |
938 | } |
939 | } | |
ac0e821b BH |
940 | else { |
941 | // cerr<<t_id<<" had error: "<<stringerror()<<endl; | |
9326cae1 BH |
942 | if(errno == EAGAIN) |
943 | g_stats.noPacketError++; | |
ac0e821b | 944 | } |
5db529f8 BH |
945 | } |
946 | ||
1bc3c142 | 947 | |
5db529f8 BH |
948 | typedef vector<pair<int, function< void(int, any&) > > > deferredAdd_t; |
949 | deferredAdd_t deferredAdd; | |
950 | ||
f28307ad | 951 | void makeTCPServerSockets() |
9c495589 | 952 | { |
37d3f960 | 953 | int fd; |
f28307ad | 954 | vector<string>locals; |
2e3d8a19 | 955 | stringtok(locals,::arg()["local-address"]," ,"); |
9c495589 | 956 | |
f28307ad | 957 | if(locals.empty()) |
3f81d239 | 958 | throw PDNSException("No local address specified"); |
f28307ad | 959 | |
f28307ad | 960 | for(vector<string>::const_iterator i=locals.begin();i!=locals.end();++i) { |
32252594 BH |
961 | ServiceTuple st; |
962 | st.port=::arg().asNum("local-port"); | |
963 | parseService(*i, st); | |
964 | ||
965 | ComboAddress sin; | |
966 | ||
f28307ad | 967 | memset((char *)&sin,0, sizeof(sin)); |
37d3f960 | 968 | sin.sin4.sin_family = AF_INET; |
32252594 | 969 | if(!IpToU32(st.host, (uint32_t*)&sin.sin4.sin_addr.s_addr)) { |
37d3f960 | 970 | sin.sin6.sin6_family = AF_INET6; |
f71bc087 | 971 | if(makeIPv6sockaddr(st.host, &sin.sin6) < 0) |
3f81d239 | 972 | throw PDNSException("Unable to resolve local address for TCP server on '"+ st.host +"'"); |
37d3f960 BH |
973 | } |
974 | ||
975 | fd=socket(sin.sin6.sin6_family, SOCK_STREAM, 0); | |
42c235e5 PD |
976 | Utility::setCloseOnExec(fd); |
977 | ||
37d3f960 | 978 | if(fd<0) |
3f81d239 | 979 | throw PDNSException("Making a TCP server socket for resolver: "+stringerror()); |
f28307ad BH |
980 | |
981 | int tmp=1; | |
37d3f960 | 982 | if(setsockopt(fd,SOL_SOCKET,SO_REUSEADDR,(char*)&tmp,sizeof tmp)<0) { |
f28307ad | 983 | L<<Logger::Error<<"Setsockopt failed for TCP listening socket"<<endl; |
c8ddb7c2 | 984 | exit(1); |
f28307ad BH |
985 | } |
986 | ||
c8ddb7c2 | 987 | #ifdef TCP_DEFER_ACCEPT |
37d3f960 BH |
988 | if(setsockopt(fd, SOL_TCP,TCP_DEFER_ACCEPT,(char*)&tmp,sizeof tmp) >= 0) { |
989 | if(i==locals.begin()) | |
4957a608 | 990 | L<<Logger::Error<<"Enabled TCP data-ready filter for (slight) DoS protection"<<endl; |
c8ddb7c2 BH |
991 | } |
992 | #endif | |
993 | ||
32252594 | 994 | sin.sin4.sin_port = htons(st.port); |
37d3f960 BH |
995 | int socklen=sin.sin4.sin_family==AF_INET ? sizeof(sin.sin4) : sizeof(sin.sin6); |
996 | if (::bind(fd, (struct sockaddr *)&sin, socklen )<0) | |
3f81d239 | 997 | throw PDNSException("Binding TCP server socket for "+ st.host +": "+stringerror()); |
f28307ad | 998 | |
37d3f960 | 999 | Utility::setNonBlocking(fd); |
49a699c4 | 1000 | setSocketSendBuffer(fd, 65000); |
37d3f960 | 1001 | listen(fd, 128); |
5db529f8 | 1002 | deferredAdd.push_back(make_pair(fd, handleNewTCPQuestion)); |
c2136bf0 BH |
1003 | g_tcpListenSockets.push_back(fd); |
1004 | ||
aa136564 | 1005 | if(sin.sin4.sin_family == AF_INET) |
32252594 | 1006 | L<<Logger::Error<<"Listening for TCP queries on "<< sin.toString() <<":"<<st.port<<endl; |
aa136564 | 1007 | else |
32252594 | 1008 | L<<Logger::Error<<"Listening for TCP queries on ["<< sin.toString() <<"]:"<<st.port<<endl; |
f28307ad | 1009 | } |
9c495589 BH |
1010 | } |
1011 | ||
bb4bdbaf BH |
1012 | |
1013 | ||
f28307ad | 1014 | void makeUDPServerSockets() |
288f4aa9 | 1015 | { |
f28307ad | 1016 | vector<string>locals; |
2e3d8a19 | 1017 | stringtok(locals,::arg()["local-address"]," ,"); |
288f4aa9 | 1018 | |
f28307ad | 1019 | if(locals.empty()) |
3f81d239 | 1020 | throw PDNSException("No local address specified"); |
f28307ad | 1021 | |
2e3d8a19 | 1022 | if(::arg()["local-address"]=="0.0.0.0") { |
c836dc19 | 1023 | L<<Logger::Warning<<"It is advised to bind to explicit addresses with the --local-address option"<<endl; |
288f4aa9 | 1024 | } |
525b8a7c | 1025 | |
f28307ad | 1026 | for(vector<string>::const_iterator i=locals.begin();i!=locals.end();++i) { |
32252594 BH |
1027 | ServiceTuple st; |
1028 | st.port=::arg().asNum("local-port"); | |
1029 | parseService(*i, st); | |
1030 | ||
37d3f960 | 1031 | ComboAddress sin; |
996c89cc | 1032 | |
37d3f960 BH |
1033 | memset(&sin, 0, sizeof(sin)); |
1034 | sin.sin4.sin_family = AF_INET; | |
32252594 | 1035 | if(!IpToU32(st.host.c_str() , (uint32_t*)&sin.sin4.sin_addr.s_addr)) { |
37d3f960 | 1036 | sin.sin6.sin6_family = AF_INET6; |
f71bc087 | 1037 | if(makeIPv6sockaddr(st.host, &sin.sin6) < 0) |
3f81d239 | 1038 | throw PDNSException("Unable to resolve local address for UDP server on '"+ st.host +"'"); |
37d3f960 BH |
1039 | } |
1040 | ||
bb4bdbaf | 1041 | int fd=socket(sin.sin4.sin_family, SOCK_DGRAM, 0); |
42c235e5 | 1042 | Utility::setCloseOnExec(fd); |
bb4bdbaf | 1043 | |
d3b4137e | 1044 | if(fd < 0) { |
3f81d239 | 1045 | throw PDNSException("Making a UDP server socket for resolver: "+netstringerror()); |
d3b4137e | 1046 | } |
37d3f960 | 1047 | |
49a699c4 | 1048 | setSocketReceiveBuffer(fd, 200000); |
32252594 | 1049 | sin.sin4.sin_port = htons(st.port); |
37d3f960 BH |
1050 | |
1051 | int socklen=sin.sin4.sin_family==AF_INET ? sizeof(sin.sin4) : sizeof(sin.sin6); | |
1052 | if (::bind(fd, (struct sockaddr *)&sin, socklen)<0) | |
3f81d239 | 1053 | throw PDNSException("Resolver binding to server socket on port "+ lexical_cast<string>(st.port) +" for "+ st.host+": "+stringerror()); |
f28307ad BH |
1054 | |
1055 | Utility::setNonBlocking(fd); | |
c2136bf0 | 1056 | |
0aaecd50 | 1057 | deferredAdd.push_back(make_pair(fd, handleNewUDPQuestion)); |
40a3dd64 | 1058 | g_listenSocketsAddresses[fd]=sin; // this is written to only from the startup thread, not from the workers |
aa136564 | 1059 | if(sin.sin4.sin_family == AF_INET) |
32252594 | 1060 | L<<Logger::Error<<"Listening for UDP queries on "<< sin.toString() <<":"<<st.port<<endl; |
aa136564 | 1061 | else |
32252594 | 1062 | L<<Logger::Error<<"Listening for UDP queries on ["<< sin.toString() <<"]:"<<st.port<<endl; |
f28307ad | 1063 | } |
c836dc19 | 1064 | } |
caa6eefa | 1065 | |
9c495589 | 1066 | |
c836dc19 BH |
1067 | void daemonize(void) |
1068 | { | |
1069 | if(fork()) | |
1070 | exit(0); // bye bye | |
1071 | ||
1072 | setsid(); | |
1073 | ||
27a5ead5 BH |
1074 | int i=open("/dev/null",O_RDWR); /* open stdin */ |
1075 | if(i < 0) | |
1076 | L<<Logger::Critical<<"Unable to open /dev/null: "<<stringerror()<<endl; | |
1077 | else { | |
1078 | dup2(i,0); /* stdin */ | |
1079 | dup2(i,1); /* stderr */ | |
1080 | dup2(i,2); /* stderr */ | |
1081 | close(i); | |
1082 | } | |
288f4aa9 | 1083 | } |
caa6eefa | 1084 | |
aaacf7f2 | 1085 | uint64_t counter; |
c75a6a9e BH |
1086 | bool statsWanted; |
1087 | ||
1088 | void usr1Handler(int) | |
1089 | { | |
1090 | statsWanted=true; | |
1091 | } | |
ae1b2e98 | 1092 | |
9170fbaf BH |
1093 | void usr2Handler(int) |
1094 | { | |
77499b05 | 1095 | SyncRes::setDefaultLogMode(SyncRes::Log); |
1d5b3ce6 BH |
1096 | g_quiet=false; |
1097 | ::arg().set("quiet")="no"; | |
c9e9e5e0 | 1098 | |
9170fbaf BH |
1099 | } |
1100 | ||
c75a6a9e BH |
1101 | void doStats(void) |
1102 | { | |
16beeaa4 BH |
1103 | static time_t lastOutputTime; |
1104 | static uint64_t lastQueryCount; | |
1105 | ||
3427fa8a BH |
1106 | if(g_stats.qcounter && (t_RC->cacheHits + t_RC->cacheMisses) && SyncRes::s_queries && SyncRes::s_outqueries) { // this only runs once thread 0 has had hits |
1107 | uint64_t cacheHits = broadcastAccFunction<uint64_t>(pleaseGetCacheHits); | |
1108 | uint64_t cacheMisses = broadcastAccFunction<uint64_t>(pleaseGetCacheMisses); | |
1109 | ||
1110 | L<<Logger::Warning<<"stats: "<<g_stats.qcounter<<" questions, "<< | |
1111 | broadcastAccFunction<uint64_t>(pleaseGetCacheSize)<< " cache entries, "<< | |
1112 | broadcastAccFunction<uint64_t>(pleaseGetNegCacheSize)<<" negative entries, "<< | |
1113 | (int)((cacheHits*100.0)/(cacheHits+cacheMisses))<<"% cache hits"<<endl; | |
1114 | ||
1115 | L<<Logger::Warning<<"stats: throttle map: " | |
1116 | << broadcastAccFunction<uint64_t>(pleaseGetThrottleSize) <<", ns speeds: " | |
1117 | << broadcastAccFunction<uint64_t>(pleaseGetNsSpeedsSize)<<endl; | |
70c2c8b1 BH |
1118 | L<<Logger::Warning<<"stats: outpacket/query ratio "<<(int)(SyncRes::s_outqueries*100.0/SyncRes::s_queries)<<"%"; |
1119 | L<<Logger::Warning<<", "<<(int)(SyncRes::s_throttledqueries*100.0/(SyncRes::s_outqueries+SyncRes::s_throttledqueries))<<"% throttled, " | |
525b8a7c | 1120 | <<SyncRes::s_nodelegated<<" no-delegation drops"<<endl; |
3427fa8a BH |
1121 | L<<Logger::Warning<<"stats: "<<SyncRes::s_tcpoutqueries<<" outgoing tcp connections, "<< |
1122 | broadcastAccFunction<uint64_t>(pleaseGetConcurrentQueries)<<" queries running, "<<SyncRes::s_outgoingtimeouts<<" outgoing timeouts"<<endl; | |
81883dcc | 1123 | |
16beeaa4 BH |
1124 | //L<<Logger::Warning<<"stats: "<<g_stats.ednsPingMatches<<" ping matches, "<<g_stats.ednsPingMismatches<<" mismatches, "<< |
1125 | //g_stats.noPingOutQueries<<" outqueries w/o ping, "<< g_stats.noEdnsOutQueries<<" w/o EDNS"<<endl; | |
1126 | ||
1127 | L<<Logger::Warning<<"stats: " << broadcastAccFunction<uint64_t>(pleaseGetPacketCacheSize) << | |
1128 | " packet cache entries, "<<(int)(100.0*broadcastAccFunction<uint64_t>(pleaseGetPacketCacheHits)/SyncRes::s_queries) << "% packet cache hits"<<endl; | |
1129 | ||
1130 | time_t now = time(0); | |
1131 | if(lastOutputTime && lastQueryCount && now != lastOutputTime) { | |
1132 | L<<Logger::Warning<<"stats: "<< (SyncRes::s_queries - lastQueryCount) / (now - lastOutputTime) <<" qps (average over "<< (now - lastOutputTime) << " seconds)"<<endl; | |
1133 | } | |
1134 | lastOutputTime = now; | |
1135 | lastQueryCount = SyncRes::s_queries; | |
c75a6a9e | 1136 | } |
7becf07f | 1137 | else if(statsWanted) |
70c2c8b1 | 1138 | L<<Logger::Warning<<"stats: no stats yet!"<<endl; |
7becf07f | 1139 | |
c75a6a9e BH |
1140 | statsWanted=false; |
1141 | } | |
c836dc19 | 1142 | |
29f0b1ce | 1143 | static void houseKeeping(void *) |
779828c4 | 1144 | try |
c836dc19 | 1145 | { |
7393d6c0 | 1146 | static __thread time_t last_stat, last_rootupdate, last_prune; |
8baca3fa | 1147 | static __thread int cleanCounter=0; |
c9e9e5e0 | 1148 | struct timeval now; |
c038218b | 1149 | Utility::gettimeofday(&now, 0); |
c9e9e5e0 | 1150 | |
1a16adf0 | 1151 | // clog<<"* "<<t_id<<" "<<(void*)&last_stat<<"\t"<<(unsigned int)last_stat<<endl; |
ac0e821b | 1152 | |
c3828c03 | 1153 | if(now.tv_sec - last_prune > (time_t)(5 + t_id)) { |
5e4a2466 BH |
1154 | DTime dt; |
1155 | dt.setTimeval(now); | |
49a699c4 | 1156 | t_RC->doPrune(); // this function is local to a thread, so fine anyhow |
c3828c03 | 1157 | t_packetCache->doPruneTo(::arg().asNum("max-packetcache-entries") / g_numThreads); |
33988bfb | 1158 | |
1a16adf0 | 1159 | pruneCollection(t_sstorage->negcache, ::arg().asNum("max-cache-entries") / (g_numThreads * 10), 200); |
8baca3fa BH |
1160 | |
1161 | if(!((cleanCounter++)%40)) { // this is a full scan! | |
1162 | time_t limit=now.tv_sec-300; | |
ac0e821b | 1163 | for(SyncRes::nsspeeds_t::iterator i = t_sstorage->nsSpeeds.begin() ; i!= t_sstorage->nsSpeeds.end(); ) |
8baca3fa | 1164 | if(i->second.stale(limit)) |
ac0e821b | 1165 | t_sstorage->nsSpeeds.erase(i++); |
8baca3fa BH |
1166 | else |
1167 | ++i; | |
1168 | } | |
7393d6c0 | 1169 | // L<<Logger::Warning<<"Spent "<<dt.udiff()/1000<<" msec cleaning"<<endl; |
ae1b2e98 BH |
1170 | last_prune=time(0); |
1171 | } | |
ac0e821b | 1172 | |
3427fa8a | 1173 | if(!t_id) { |
ac0e821b | 1174 | if(now.tv_sec - last_stat > 1800) { |
3427fa8a BH |
1175 | doStats(); |
1176 | last_stat=time(0); | |
1177 | } | |
c836dc19 | 1178 | } |
ac0e821b | 1179 | |
c038218b | 1180 | if(now.tv_sec - last_rootupdate > 7200) { |
c9e9e5e0 | 1181 | SyncRes sr(now); |
2188dcc3 | 1182 | sr.setDoEDNS0(true); |
ea634573 | 1183 | vector<DNSResourceRecord> ret; |
c836dc19 BH |
1184 | |
1185 | sr.setNoCache(); | |
a9af3782 | 1186 | int res=sr.beginResolve(".", QType(QType::NS), 1, ret); |
c836dc19 | 1187 | if(!res) { |
70c2c8b1 | 1188 | L<<Logger::Warning<<"Refreshed . records"<<endl; |
c9e9e5e0 | 1189 | last_rootupdate=now.tv_sec; |
c836dc19 BH |
1190 | } |
1191 | else | |
1192 | L<<Logger::Error<<"Failed to update . records, RCODE="<<res<<endl; | |
1193 | } | |
1194 | } | |
3f81d239 | 1195 | catch(PDNSException& ae) |
779828c4 BH |
1196 | { |
1197 | L<<Logger::Error<<"Fatal error: "<<ae.reason<<endl; | |
1198 | throw; | |
1199 | } | |
705f31ae | 1200 | ; |
d6d5dea7 | 1201 | |
49a699c4 BH |
1202 | void makeThreadPipes() |
1203 | { | |
c3828c03 | 1204 | for(unsigned int n=0; n < g_numThreads; ++n) { |
49a699c4 BH |
1205 | struct ThreadPipeSet tps; |
1206 | int fd[2]; | |
1207 | if(pipe(fd) < 0) | |
1208 | unixDie("Creating pipe for inter-thread communications"); | |
1209 | ||
1210 | tps.readToThread = fd[0]; | |
1211 | tps.writeToThread = fd[1]; | |
1212 | ||
1213 | if(pipe(fd) < 0) | |
1214 | unixDie("Creating pipe for inter-thread communications"); | |
1215 | tps.readFromThread = fd[0]; | |
1216 | tps.writeFromThread = fd[1]; | |
1217 | ||
1218 | g_pipes.push_back(tps); | |
1219 | } | |
1220 | } | |
1221 | ||
00c9b8c1 BH |
1222 | struct ThreadMSG |
1223 | { | |
1224 | pipefunc_t func; | |
1225 | bool wantAnswer; | |
1226 | }; | |
1227 | ||
49a699c4 BH |
1228 | void broadcastFunction(const pipefunc_t& func, bool skipSelf) |
1229 | { | |
49a699c4 BH |
1230 | unsigned int n = 0; |
1231 | BOOST_FOREACH(ThreadPipeSet& tps, g_pipes) | |
1232 | { | |
1233 | if(n++ == t_id) { | |
1234 | if(!skipSelf) | |
1235 | func(); // don't write to ourselves! | |
1236 | continue; | |
1237 | } | |
00c9b8c1 BH |
1238 | |
1239 | ThreadMSG* tmsg = new ThreadMSG(); | |
1240 | tmsg->func = func; | |
1241 | tmsg->wantAnswer = true; | |
1242 | if(write(tps.writeToThread, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) | |
49a699c4 BH |
1243 | unixDie("write to thread pipe returned wrong size or error"); |
1244 | ||
1245 | string* resp; | |
1246 | if(read(tps.readFromThread, &resp, sizeof(resp)) != sizeof(resp)) | |
1247 | unixDie("read from thread pipe returned wrong size or error"); | |
1248 | ||
1249 | if(resp) { | |
1250 | // cerr <<"got response: " << *resp << endl; | |
1251 | delete resp; | |
1252 | } | |
1253 | } | |
1254 | } | |
00c9b8c1 BH |
1255 | void distributeAsyncFunction(const pipefunc_t& func) |
1256 | { | |
1257 | static unsigned int counter; | |
1bc3c142 | 1258 | unsigned int target = 1 + (++counter % (g_pipes.size()-1)); |
00c9b8c1 BH |
1259 | // cerr<<"Sending to: "<<target<<endl; |
1260 | if(target == t_id) { | |
1261 | func(); | |
1262 | return; | |
1263 | } | |
1264 | ThreadPipeSet& tps = g_pipes[target]; | |
1265 | ThreadMSG* tmsg = new ThreadMSG(); | |
1266 | tmsg->func = func; | |
1267 | tmsg->wantAnswer = false; | |
1268 | ||
1269 | if(write(tps.writeToThread, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) | |
1270 | unixDie("write to thread pipe returned wrong size or error"); | |
1271 | ||
1272 | } | |
3427fa8a | 1273 | |
49a699c4 BH |
1274 | void handlePipeRequest(int fd, FDMultiplexer::funcparam_t& var) |
1275 | { | |
00c9b8c1 BH |
1276 | ThreadMSG* tmsg; |
1277 | ||
1278 | if(read(fd, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) { // fd == readToThread | |
49a699c4 BH |
1279 | unixDie("read from thread pipe returned wrong size or error"); |
1280 | } | |
3427fa8a | 1281 | |
00c9b8c1 BH |
1282 | void *resp = tmsg->func(); |
1283 | if(tmsg->wantAnswer) | |
1284 | if(write(g_pipes[t_id].writeFromThread, &resp, sizeof(resp)) != sizeof(resp)) | |
1285 | unixDie("write to thread pipe returned wrong size or error"); | |
3427fa8a | 1286 | |
00c9b8c1 | 1287 | delete tmsg; |
49a699c4 | 1288 | } |
09e6702a | 1289 | |
13034931 BH |
1290 | template<class T> void *voider(const boost::function<T*()>& func) |
1291 | { | |
1292 | return func(); | |
1293 | } | |
1294 | ||
b3b5459d BH |
1295 | vector<ComboAddress>& operator+=(vector<ComboAddress>&a, const vector<ComboAddress>& b) |
1296 | { | |
1297 | a.insert(a.end(), b.begin(), b.end()); | |
1298 | return a; | |
1299 | } | |
1300 | ||
13034931 | 1301 | template<class T> T broadcastAccFunction(const boost::function<T*()>& func, bool skipSelf) |
3427fa8a BH |
1302 | { |
1303 | unsigned int n = 0; | |
1304 | T ret=T(); | |
1305 | BOOST_FOREACH(ThreadPipeSet& tps, g_pipes) | |
1306 | { | |
1307 | if(n++ == t_id) { | |
1308 | if(!skipSelf) { | |
1309 | T* resp = (T*)func(); // don't write to ourselves! | |
1310 | if(resp) { | |
1311 | //~ cerr <<"got direct: " << *resp << endl; | |
1312 | ret += *resp; | |
1313 | delete resp; | |
1314 | } | |
1315 | } | |
1316 | continue; | |
1317 | } | |
1318 | ||
00c9b8c1 BH |
1319 | ThreadMSG* tmsg = new ThreadMSG(); |
1320 | tmsg->func = boost::bind(voider<T>, func); | |
1321 | tmsg->wantAnswer = true; | |
1322 | ||
1323 | if(write(tps.writeToThread, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) | |
3427fa8a | 1324 | unixDie("write to thread pipe returned wrong size or error"); |
00c9b8c1 | 1325 | |
3427fa8a BH |
1326 | |
1327 | T* resp; | |
1328 | if(read(tps.readFromThread, &resp, sizeof(resp)) != sizeof(resp)) | |
1329 | unixDie("read from thread pipe returned wrong size or error"); | |
1330 | ||
1331 | if(resp) { | |
1332 | //~ cerr <<"got response: " << *resp << endl; | |
1333 | ret += *resp; | |
1334 | delete resp; | |
1335 | } | |
1336 | } | |
1337 | return ret; | |
1338 | } | |
1339 | ||
13034931 BH |
1340 | template string broadcastAccFunction(const boost::function<string*()>& fun, bool skipSelf); // explicit instantiation |
1341 | template uint64_t broadcastAccFunction(const boost::function<uint64_t*()>& fun, bool skipSelf); // explicit instantiation | |
b3b5459d | 1342 | template vector<ComboAddress> broadcastAccFunction(const boost::function<vector<ComboAddress> *()>& fun, bool skipSelf); // explicit instantiation |
3427fa8a | 1343 | |
d8f6d49f | 1344 | void handleRCC(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a BH |
1345 | { |
1346 | string remote; | |
1347 | string msg=s_rcc.recv(&remote); | |
1348 | RecursorControlParser rcp; | |
1349 | RecursorControlParser::func_t* command; | |
77499b05 | 1350 | |
09e6702a | 1351 | string answer=rcp.getAnswer(msg, &command); |
ab5c053d BH |
1352 | try { |
1353 | s_rcc.send(answer, &remote); | |
1354 | command(); | |
1355 | } | |
fdbf35ac | 1356 | catch(std::exception& e) { |
ab5c053d BH |
1357 | L<<Logger::Error<<"Error dealing with control socket request: "<<e.what()<<endl; |
1358 | } | |
3f81d239 | 1359 | catch(PDNSException& ae) { |
ab5c053d BH |
1360 | L<<Logger::Error<<"Error dealing with control socket request: "<<ae.reason<<endl; |
1361 | } | |
09e6702a BH |
1362 | } |
1363 | ||
d8f6d49f | 1364 | void handleTCPClientReadable(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 1365 | { |
0b18b22e | 1366 | PacketID* pident=any_cast<PacketID>(&var); |
667f7e60 | 1367 | // cerr<<"handleTCPClientReadable called for fd "<<fd<<", pident->inNeeded: "<<pident->inNeeded<<", "<<pident->sock->getHandle()<<endl; |
09e6702a | 1368 | |
667f7e60 | 1369 | shared_array<char> buffer(new char[pident->inNeeded]); |
09e6702a | 1370 | |
705f31ae | 1371 | int ret=recv(fd, buffer.get(), pident->inNeeded,0); |
09e6702a | 1372 | if(ret > 0) { |
667f7e60 BH |
1373 | pident->inMSG.append(&buffer[0], &buffer[ret]); |
1374 | pident->inNeeded-=ret; | |
1375 | if(!pident->inNeeded) { | |
1376 | // cerr<<"Got entire load of "<<pident->inMSG.size()<<" bytes"<<endl; | |
1377 | PacketID pid=*pident; | |
1378 | string msg=pident->inMSG; | |
09e6702a | 1379 | |
bb4bdbaf | 1380 | t_fdm->removeReadFD(fd); |
09e6702a BH |
1381 | MT->sendEvent(pid, &msg); |
1382 | } | |
1383 | else { | |
667f7e60 | 1384 | // cerr<<"Still have "<<pident->inNeeded<<" left to go"<<endl; |
09e6702a BH |
1385 | } |
1386 | } | |
1387 | else { | |
667f7e60 | 1388 | PacketID tmp=*pident; |
bb4bdbaf | 1389 | t_fdm->removeReadFD(fd); // pident might now be invalid (it isn't, but still) |
09e6702a BH |
1390 | string empty; |
1391 | MT->sendEvent(tmp, &empty); // this conveys error status | |
1392 | } | |
1393 | } | |
1394 | ||
d8f6d49f | 1395 | void handleTCPClientWritable(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 1396 | { |
0b18b22e | 1397 | PacketID* pid=any_cast<PacketID>(&var); |
4ca15bca | 1398 | int ret=send(fd, pid->outMSG.c_str() + pid->outPos, pid->outMSG.size() - pid->outPos,0); |
09e6702a | 1399 | if(ret > 0) { |
667f7e60 BH |
1400 | pid->outPos+=ret; |
1401 | if(pid->outPos==pid->outMSG.size()) { | |
1402 | PacketID tmp=*pid; | |
bb4bdbaf | 1403 | t_fdm->removeWriteFD(fd); |
09e6702a BH |
1404 | MT->sendEvent(tmp, &tmp.outMSG); // send back what we sent to convey everything is ok |
1405 | } | |
1406 | } | |
1407 | else { // error or EOF | |
667f7e60 | 1408 | PacketID tmp(*pid); |
bb4bdbaf | 1409 | t_fdm->removeWriteFD(fd); |
09e6702a | 1410 | string sent; |
998a4334 | 1411 | MT->sendEvent(tmp, &sent); // we convey error status by sending empty string |
09e6702a BH |
1412 | } |
1413 | } | |
1414 | ||
34801ab1 BH |
1415 | // resend event to everybody chained onto it |
1416 | void doResends(MT_t::waiters_t::iterator& iter, PacketID resend, const string& content) | |
1417 | { | |
1418 | if(iter->key.chain.empty()) | |
1419 | return; | |
e27e91a8 | 1420 | // cerr<<"doResends called!\n"; |
34801ab1 BH |
1421 | for(PacketID::chain_t::iterator i=iter->key.chain.begin(); i != iter->key.chain.end() ; ++i) { |
1422 | resend.fd=-1; | |
1423 | resend.id=*i; | |
e27e91a8 | 1424 | // cerr<<"\tResending "<<content.size()<<" bytes for fd="<<resend.fd<<" and id="<<resend.id<<endl; |
4665c31e | 1425 | |
34801ab1 BH |
1426 | MT->sendEvent(resend, &content); |
1427 | g_stats.chainResends++; | |
34801ab1 BH |
1428 | } |
1429 | } | |
1430 | ||
d8f6d49f | 1431 | void handleUDPServerResponse(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 1432 | { |
600fc20b | 1433 | PacketID pid=any_cast<PacketID>(var); |
998a4334 | 1434 | int len; |
09e6702a | 1435 | char data[1500]; |
996c89cc | 1436 | ComboAddress fromaddr; |
09e6702a BH |
1437 | socklen_t addrlen=sizeof(fromaddr); |
1438 | ||
998a4334 | 1439 | len=recvfrom(fd, data, sizeof(data), 0, (sockaddr *)&fromaddr, &addrlen); |
c1da7976 | 1440 | |
998a4334 BH |
1441 | if(len < (int)sizeof(dnsheader)) { |
1442 | if(len < 0) | |
996c89cc | 1443 | ; // cerr<<"Error on fd "<<fd<<": "<<stringerror()<<"\n"; |
09e6702a BH |
1444 | else { |
1445 | g_stats.serverParseError++; | |
1446 | if(g_logCommonErrors) | |
85db02c5 | 1447 | L<<Logger::Error<<"Unable to parse packet from remote UDP server "<< fromaddr.toString() << |
e44d9fa7 | 1448 | ": packet smaller than DNS header"<<endl; |
998a4334 | 1449 | } |
34801ab1 | 1450 | |
49a699c4 | 1451 | t_udpclientsocks->returnSocket(fd); |
34801ab1 BH |
1452 | string empty; |
1453 | ||
1454 | MT_t::waiters_t::iterator iter=MT->d_waiters.find(pid); | |
1455 | if(iter != MT->d_waiters.end()) | |
1456 | doResends(iter, pid, empty); | |
1457 | ||
1458 | MT->sendEvent(pid, &empty); // this denotes error (does lookup again.. at least L1 will be hot) | |
998a4334 BH |
1459 | return; |
1460 | } | |
1461 | ||
1462 | dnsheader dh; | |
1463 | memcpy(&dh, data, sizeof(dh)); | |
1464 | ||
6da3b3ad PD |
1465 | PacketID pident; |
1466 | pident.remote=fromaddr; | |
1467 | pident.id=dh.id; | |
1468 | pident.fd=fd; | |
34801ab1 | 1469 | |
6da3b3ad PD |
1470 | if(!dh.qr) { |
1471 | L<<Logger::Warning<<"Not taking data from question on outgoing socket from "<< fromaddr.toStringWithPort() <<endl; | |
1472 | } | |
1473 | ||
1474 | if(!dh.qdcount || // UPC, Nominum, very old BIND on FormErr, NSD | |
1475 | !dh.qr) { // one weird server | |
1476 | pident.domain.clear(); | |
1477 | pident.type = 0; | |
1478 | } | |
1479 | else { | |
1480 | try { | |
1481 | pident.domain=questionExpand(data, len, pident.type); // don't copy this from above - we need to do the actual read | |
1482 | } | |
1483 | catch(std::exception& e) { | |
1484 | g_stats.serverParseError++; // won't be fed to lwres.cc, so we have to increment | |
1485 | L<<Logger::Warning<<"Error in packet from "<< fromaddr.toStringWithPort() << ": "<<e.what() << endl; | |
1486 | return; | |
34801ab1 | 1487 | } |
6da3b3ad PD |
1488 | } |
1489 | string packet; | |
1490 | packet.assign(data, len); | |
34801ab1 | 1491 | |
6da3b3ad PD |
1492 | MT_t::waiters_t::iterator iter=MT->d_waiters.find(pident); |
1493 | if(iter != MT->d_waiters.end()) { | |
1494 | doResends(iter, pident, packet); | |
1495 | } | |
c1da7976 | 1496 | |
6da3b3ad | 1497 | retryWithName: |
4957a608 | 1498 | |
6da3b3ad PD |
1499 | if(!MT->sendEvent(pident, &packet)) { |
1500 | // 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 | |
1501 | for(MT_t::waiters_t::iterator mthread=MT->d_waiters.begin(); mthread!=MT->d_waiters.end(); ++mthread) { | |
1502 | if(pident.fd==mthread->key.fd && mthread->key.remote==pident.remote && mthread->key.type == pident.type && | |
1503 | pdns_iequals(pident.domain, mthread->key.domain)) { | |
1504 | mthread->key.nearMisses++; | |
998a4334 | 1505 | } |
6da3b3ad PD |
1506 | |
1507 | // be a bit paranoid here since we're weakening our matching | |
1508 | if(pident.domain.empty() && !mthread->key.domain.empty() && !pident.type && mthread->key.type && | |
1509 | pident.id == mthread->key.id && mthread->key.remote == pident.remote) { | |
1510 | // cerr<<"Empty response, rest matches though, sending to a waiter"<<endl; | |
1511 | pident.domain = mthread->key.domain; | |
1512 | pident.type = mthread->key.type; | |
1513 | goto retryWithName; // note that this only passes on an error, lwres will still reject the packet | |
d4fb76e9 | 1514 | } |
09e6702a | 1515 | } |
6da3b3ad PD |
1516 | g_stats.unexpectedCount++; // if we made it here, it really is an unexpected answer |
1517 | if(g_logCommonErrors) { | |
1518 | L<<Logger::Warning<<"Discarding unexpected packet from "<<fromaddr.toStringWithPort()<<": "<<pident.domain<<", "<<pident.type<<", "<<MT->d_waiters.size()<<" waiters"<<endl; | |
d8f6d49f | 1519 | } |
09e6702a | 1520 | } |
6da3b3ad PD |
1521 | else if(fd >= 0) { |
1522 | t_udpclientsocks->returnSocket(fd); | |
1523 | } | |
09e6702a BH |
1524 | } |
1525 | ||
1f4abb20 BH |
1526 | FDMultiplexer* getMultiplexer() |
1527 | { | |
1528 | FDMultiplexer* ret; | |
1529 | for(FDMultiplexer::FDMultiplexermap_t::const_iterator i = FDMultiplexer::getMultiplexerMap().begin(); | |
1530 | i != FDMultiplexer::getMultiplexerMap().end(); ++i) { | |
1531 | try { | |
1532 | ret=i->second(); | |
1f4abb20 BH |
1533 | return ret; |
1534 | } | |
98d0ee4a | 1535 | catch(FDMultiplexerException &fe) { |
0a7f24cb | 1536 | L<<Logger::Error<<"Non-fatal error initializing possible multiplexer ("<<fe.what()<<"), falling back"<<endl; |
98d0ee4a BH |
1537 | } |
1538 | catch(...) { | |
1539 | L<<Logger::Error<<"Non-fatal error initializing possible multiplexer"<<endl; | |
1540 | } | |
1f4abb20 BH |
1541 | } |
1542 | L<<Logger::Error<<"No working multiplexer found!"<<endl; | |
1543 | exit(1); | |
1544 | } | |
1545 | ||
5605c067 | 1546 | |
0f39c1a3 | 1547 | string* doReloadLuaScript() |
4485aa35 | 1548 | { |
674cf0f6 | 1549 | string fname= ::arg()["lua-dns-script"]; |
4485aa35 | 1550 | try { |
674cf0f6 BH |
1551 | if(fname.empty()) { |
1552 | t_pdl->reset(); | |
1553 | L<<Logger::Error<<t_id<<" Unloaded current lua script"<<endl; | |
0f39c1a3 | 1554 | return new string("unloaded\n"); |
4485aa35 BH |
1555 | } |
1556 | else { | |
5704e107 | 1557 | *t_pdl = shared_ptr<RecursorLua>(new RecursorLua(fname)); |
4485aa35 BH |
1558 | } |
1559 | } | |
fdbf35ac | 1560 | catch(std::exception& e) { |
674cf0f6 | 1561 | L<<Logger::Error<<t_id<<" Retaining current script, error from '"<<fname<<"': "<< e.what() <<endl; |
0f39c1a3 | 1562 | return new string("retaining current script, error from '"+fname+"': "+e.what()+"\n"); |
4485aa35 | 1563 | } |
674cf0f6 BH |
1564 | |
1565 | L<<Logger::Warning<<t_id<<" (Re)loaded lua script from '"<<fname<<"'"<<endl; | |
0f39c1a3 | 1566 | return new string("(re)loaded '"+fname+"'\n"); |
4485aa35 BH |
1567 | } |
1568 | ||
49a699c4 BH |
1569 | string doQueueReloadLuaScript(vector<string>::const_iterator begin, vector<string>::const_iterator end) |
1570 | { | |
1571 | if(begin != end) | |
1572 | ::arg().set("lua-dns-script") = *begin; | |
1573 | ||
0f39c1a3 | 1574 | return broadcastAccFunction<string>(doReloadLuaScript); |
49a699c4 BH |
1575 | } |
1576 | ||
77499b05 BH |
1577 | string* pleaseUseNewTraceRegex(const std::string& newRegex) |
1578 | try | |
1579 | { | |
1580 | if(newRegex.empty()) { | |
1581 | t_traceRegex->reset(); | |
1582 | return new string("unset\n"); | |
1583 | } | |
1584 | else { | |
1585 | (*t_traceRegex) = shared_ptr<Regex>(new Regex(newRegex)); | |
1586 | return new string("ok\n"); | |
1587 | } | |
1588 | } | |
3f81d239 | 1589 | catch(PDNSException& ae) |
77499b05 BH |
1590 | { |
1591 | return new string(ae.reason+"\n"); | |
1592 | } | |
1593 | ||
1594 | string doTraceRegex(vector<string>::const_iterator begin, vector<string>::const_iterator end) | |
1595 | { | |
1596 | return broadcastAccFunction<string>(boost::bind(pleaseUseNewTraceRegex, begin!=end ? *begin : "")); | |
1597 | } | |
1598 | ||
1599 | ||
bb4bdbaf | 1600 | void* recursorThread(void*); |
51e2144e | 1601 | |
3427fa8a | 1602 | void* pleaseSupplantACLs(NetmaskGroup *ng) |
49a699c4 BH |
1603 | { |
1604 | t_allowFrom = ng; | |
3427fa8a | 1605 | return 0; |
49a699c4 BH |
1606 | } |
1607 | ||
dbd23fc2 BH |
1608 | int g_argc; |
1609 | char** g_argv; | |
1610 | ||
18af64a8 | 1611 | void parseACLs() |
f7c1d4e3 | 1612 | { |
18af64a8 | 1613 | static bool l_initialized; |
49a699c4 BH |
1614 | |
1615 | if(l_initialized) { // only reload configuration file on second call | |
18af64a8 BH |
1616 | string configname=::arg()["config-dir"]+"/recursor.conf"; |
1617 | cleanSlashes(configname); | |
1618 | ||
1619 | if(!::arg().preParseFile(configname.c_str(), "allow-from-file")) | |
1620 | L<<Logger::Warning<<"Unable to re-parse configuration file '"<<configname<<"'"<<endl; | |
dbd23fc2 | 1621 | ::arg().preParse(g_argc, g_argv, "allow-from-file"); |
49a699c4 | 1622 | ::arg().preParseFile(configname.c_str(), "allow-from", LOCAL_NETS); |
dbd23fc2 | 1623 | ::arg().preParse(g_argc, g_argv, "allow-from"); |
f27e6356 | 1624 | } |
49a699c4 BH |
1625 | |
1626 | NetmaskGroup* oldAllowFrom = t_allowFrom, *allowFrom=new NetmaskGroup; | |
1627 | ||
2c95fc65 BH |
1628 | if(!::arg()["allow-from-file"].empty()) { |
1629 | string line; | |
2c95fc65 BH |
1630 | ifstream ifs(::arg()["allow-from-file"].c_str()); |
1631 | if(!ifs) { | |
49a699c4 | 1632 | delete allowFrom; |
9c61b9d0 | 1633 | throw runtime_error("Could not open '"+::arg()["allow-from-file"]+"': "+stringerror()); |
2c95fc65 BH |
1634 | } |
1635 | ||
1636 | string::size_type pos; | |
1637 | while(getline(ifs,line)) { | |
1638 | pos=line.find('#'); | |
1639 | if(pos!=string::npos) | |
1640 | line.resize(pos); | |
1641 | trim(line); | |
1642 | if(line.empty()) | |
1643 | continue; | |
1644 | ||
18af64a8 | 1645 | allowFrom->addMask(line); |
2c95fc65 | 1646 | } |
49a699c4 | 1647 | L<<Logger::Warning<<"Done parsing " << allowFrom->size() <<" allow-from ranges from file '"<<::arg()["allow-from-file"]<<"' - overriding 'allow-from' setting"<<endl; |
2c95fc65 BH |
1648 | } |
1649 | else if(!::arg()["allow-from"].empty()) { | |
f7c1d4e3 BH |
1650 | vector<string> ips; |
1651 | stringtok(ips, ::arg()["allow-from"], ", "); | |
c36bc97a | 1652 | |
f7c1d4e3 BH |
1653 | L<<Logger::Warning<<"Only allowing queries from: "; |
1654 | for(vector<string>::const_iterator i = ips.begin(); i!= ips.end(); ++i) { | |
18af64a8 | 1655 | allowFrom->addMask(*i); |
f7c1d4e3 | 1656 | if(i!=ips.begin()) |
674cf0f6 | 1657 | L<<Logger::Warning<<", "; |
f7c1d4e3 BH |
1658 | L<<Logger::Warning<<*i; |
1659 | } | |
1660 | L<<Logger::Warning<<endl; | |
1661 | } | |
49a699c4 BH |
1662 | else { |
1663 | if(::arg()["local-address"]!="127.0.0.1" && ::arg().asNum("local-port")==53) | |
1664 | L<<Logger::Error<<"WARNING: Allowing queries from all IP addresses - this can be a security risk!"<<endl; | |
1665 | delete allowFrom; | |
1666 | allowFrom = 0; | |
1667 | } | |
1668 | ||
1669 | g_initialAllowFrom = allowFrom; | |
d7dae798 | 1670 | broadcastFunction(boost::bind(pleaseSupplantACLs, allowFrom)); |
49a699c4 BH |
1671 | delete oldAllowFrom; |
1672 | ||
1673 | l_initialized = true; | |
18af64a8 BH |
1674 | } |
1675 | ||
1676 | int serviceMain(int argc, char*argv[]) | |
1677 | { | |
5124de27 RA |
1678 | |
1679 | ||
1680 | L.setName(s_programname); | |
18af64a8 BH |
1681 | |
1682 | L.setLoglevel((Logger::Urgency)(6)); // info and up | |
1683 | ||
1684 | if(!::arg()["logging-facility"].empty()) { | |
f8499e52 BH |
1685 | int val=logFacilityToLOG(::arg().asNum("logging-facility") ); |
1686 | if(val >= 0) | |
1687 | theL().setFacility(val); | |
18af64a8 BH |
1688 | else |
1689 | L<<Logger::Error<<"Unknown logging facility "<<::arg().asNum("logging-facility") <<endl; | |
1690 | } | |
1691 | ||
ba1a571d | 1692 | showProductVersion(); |
18af64a8 | 1693 | |
85c32340 BH |
1694 | #if 0 |
1695 | unsigned int maxFDs, curFDs; | |
1696 | getFDLimits(curFDs, maxFDs); | |
1697 | if(curFDs < 2048) | |
1698 | L<<Logger::Warning<<"Only "<<curFDs<<" file descriptors available (out of: "<<maxFDs<<"), may not be suitable for high performance"<<endl; | |
1699 | #endif | |
1700 | ||
18af64a8 | 1701 | seedRandom(::arg()["entropy-source"]); |
2c95fc65 | 1702 | |
18af64a8 BH |
1703 | parseACLs(); |
1704 | ||
eb5bae86 BH |
1705 | if(!::arg()["dont-query"].empty()) { |
1706 | g_dontQuery=new NetmaskGroup; | |
1707 | vector<string> ips; | |
1708 | stringtok(ips, ::arg()["dont-query"], ", "); | |
66e0b6ea BH |
1709 | ips.push_back("0.0.0.0"); |
1710 | ips.push_back("::"); | |
c36bc97a | 1711 | |
eb5bae86 BH |
1712 | L<<Logger::Warning<<"Will not send queries to: "; |
1713 | for(vector<string>::const_iterator i = ips.begin(); i!= ips.end(); ++i) { | |
1714 | g_dontQuery->addMask(*i); | |
1715 | if(i!=ips.begin()) | |
4957a608 | 1716 | L<<Logger::Warning<<", "; |
eb5bae86 BH |
1717 | L<<Logger::Warning<<*i; |
1718 | } | |
1719 | L<<Logger::Warning<<endl; | |
1720 | } | |
1721 | ||
f7c1d4e3 | 1722 | g_quiet=::arg().mustDo("quiet"); |
1bc3c142 BH |
1723 | g_weDistributeQueries = ::arg().mustDo("pdns-distributes-queries"); |
1724 | if(g_weDistributeQueries) { | |
1725 | L<<Logger::Warning<<"PowerDNS Recursor itself will distribute queries over threads"<<endl; | |
1726 | } | |
1727 | ||
77499b05 BH |
1728 | if(::arg()["trace"]=="fail") { |
1729 | SyncRes::setDefaultLogMode(SyncRes::Store); | |
1730 | } | |
1731 | else if(::arg().mustDo("trace")) { | |
1732 | SyncRes::setDefaultLogMode(SyncRes::Log); | |
f7c1d4e3 BH |
1733 | ::arg().set("quiet")="no"; |
1734 | g_quiet=false; | |
1735 | } | |
f7c1d4e3 | 1736 | |
77499b05 | 1737 | |
5a38281c BH |
1738 | try { |
1739 | vector<string> addrs; | |
1740 | if(!::arg()["query-local-address6"].empty()) { | |
1741 | SyncRes::s_doIPv6=true; | |
d4fb76e9 | 1742 | L<<Logger::Warning<<"Enabling IPv6 transport for outgoing queries"<<endl; |
5a38281c BH |
1743 | |
1744 | stringtok(addrs, ::arg()["query-local-address6"], ", ;"); | |
1745 | BOOST_FOREACH(const string& addr, addrs) { | |
4957a608 | 1746 | g_localQueryAddresses6.push_back(ComboAddress(addr)); |
5a38281c BH |
1747 | } |
1748 | } | |
d4fb76e9 BH |
1749 | else { |
1750 | L<<Logger::Warning<<"NOT using IPv6 for outgoing queries - set 'query-local-address6=::' to enable"<<endl; | |
1751 | } | |
5a38281c BH |
1752 | addrs.clear(); |
1753 | stringtok(addrs, ::arg()["query-local-address"], ", ;"); | |
1754 | BOOST_FOREACH(const string& addr, addrs) { | |
1755 | g_localQueryAddresses4.push_back(ComboAddress(addr)); | |
1756 | } | |
1757 | } | |
1758 | catch(std::exception& e) { | |
1759 | L<<Logger::Error<<"Assigning local query addresses: "<<e.what(); | |
1760 | exit(99); | |
f7c1d4e3 | 1761 | } |
f555e92e BH |
1762 | |
1763 | SyncRes::s_doAAAAAdditionalProcessing = ::arg().mustDo("aaaa-additional-processing"); | |
1764 | SyncRes::s_doAdditionalProcessing = ::arg().mustDo("additional-processing") | SyncRes::s_doAAAAAdditionalProcessing; | |
bb4bdbaf | 1765 | |
578361b3 | 1766 | SyncRes::s_noEDNSPing = true; // ::arg().mustDo("disable-edns-ping"); |
4bfae16d | 1767 | SyncRes::s_noEDNS = ::arg().mustDo("disable-edns"); |
578361b3 | 1768 | if(!SyncRes::s_noEDNS) { |
1769 | L<<Logger::Warning<<"Running in experimental EDNS mode - may cause problems"<<endl; | |
1770 | } | |
bb4bdbaf | 1771 | |
1051f8a9 BH |
1772 | SyncRes::s_nopacketcache = ::arg().mustDo("disable-packetcache"); |
1773 | ||
f7c1d4e3 | 1774 | SyncRes::s_maxnegttl=::arg().asNum("max-negative-ttl"); |
c3e753c7 | 1775 | SyncRes::s_maxcachettl=::arg().asNum("max-cache-ttl"); |
1051f8a9 BH |
1776 | SyncRes::s_packetcachettl=::arg().asNum("packetcache-ttl"); |
1777 | SyncRes::s_packetcacheservfailttl=::arg().asNum("packetcache-servfail-ttl"); | |
f7c1d4e3 BH |
1778 | SyncRes::s_serverID=::arg()["server-id"]; |
1779 | if(SyncRes::s_serverID.empty()) { | |
1780 | char tmp[128]; | |
1781 | gethostname(tmp, sizeof(tmp)-1); | |
1782 | SyncRes::s_serverID=tmp; | |
1783 | } | |
1784 | ||
5b0ddd18 | 1785 | g_networkTimeoutMsec = ::arg().asNum("network-timeout"); |
bb4bdbaf | 1786 | |
49a699c4 | 1787 | g_initialDomainMap = parseAuthAndForwards(); |
674cf0f6 | 1788 | |
b3b5459d | 1789 | |
f7c1d4e3 | 1790 | g_logCommonErrors=::arg().mustDo("log-common-errors"); |
e661a20b PD |
1791 | |
1792 | g_anyToTcp = ::arg().mustDo("any-to-tcp"); | |
a09a8ce0 PD |
1793 | g_udpTruncationThreshold = ::arg().asNum("udp-truncation-threshold"); |
1794 | ||
f7c1d4e3 BH |
1795 | makeUDPServerSockets(); |
1796 | makeTCPServerSockets(); | |
815099b2 | 1797 | |
677e2a46 BH |
1798 | int forks; |
1799 | for(forks = 0; forks < ::arg().asNum("processes") - 1; ++forks) { | |
1bc3c142 BH |
1800 | if(!fork()) // we are child |
1801 | break; | |
1802 | } | |
1803 | ||
02e7bdeb | 1804 | s_pidfname=::arg()["socket-dir"]+"/pdns_"+s_programname+".pid"; |
815099b2 BH |
1805 | if(!s_pidfname.empty()) |
1806 | unlink(s_pidfname.c_str()); // remove possible old pid file | |
f7c1d4e3 | 1807 | |
f7c1d4e3 BH |
1808 | if(::arg().mustDo("daemon")) { |
1809 | L<<Logger::Warning<<"Calling daemonize, going to background"<<endl; | |
1810 | L.toConsole(Logger::Critical); | |
f7c1d4e3 BH |
1811 | daemonize(); |
1812 | } | |
1813 | signal(SIGUSR1,usr1Handler); | |
1814 | signal(SIGUSR2,usr2Handler); | |
1815 | signal(SIGPIPE,SIG_IGN); | |
1816 | writePid(); | |
677e2a46 | 1817 | makeControlChannelSocket( ::arg().asNum("processes") > 1 ? forks : -1); |
138435cb BH |
1818 | |
1819 | int newgid=0; | |
1820 | if(!::arg()["setgid"].empty()) | |
1821 | newgid=Utility::makeGidNumeric(::arg()["setgid"]); | |
1822 | int newuid=0; | |
1823 | if(!::arg()["setuid"].empty()) | |
1824 | newuid=Utility::makeUidNumeric(::arg()["setuid"]); | |
1825 | ||
138435cb BH |
1826 | if (!::arg()["chroot"].empty()) { |
1827 | if (chroot(::arg()["chroot"].c_str())<0 || chdir("/") < 0) { | |
1828 | L<<Logger::Error<<"Unable to chroot to '"+::arg()["chroot"]+"': "<<strerror (errno)<<", exiting"<<endl; | |
1829 | exit(1); | |
1830 | } | |
1831 | } | |
1832 | ||
1833 | Utility::dropPrivs(newuid, newgid); | |
1bc3c142 | 1834 | g_numThreads = ::arg().asNum("threads") + ::arg().mustDo("pdns-distributes-queries"); |
343257a4 | 1835 | |
49a699c4 | 1836 | makeThreadPipes(); |
5d4dd7fe BH |
1837 | |
1838 | g_tcpTimeout=::arg().asNum("client-tcp-timeout"); | |
1839 | g_maxTCPPerClient=::arg().asNum("max-tcp-per-client"); | |
85c32340 | 1840 | g_maxMThreads=::arg().asNum("max-mthreads"); |
343257a4 | 1841 | |
c3828c03 | 1842 | if(g_numThreads == 1) { |
76698c6e | 1843 | L<<Logger::Warning<<"Operating unthreaded"<<endl; |
76698c6e BH |
1844 | recursorThread(0); |
1845 | } | |
1846 | else { | |
1847 | pthread_t tid; | |
c3828c03 BH |
1848 | L<<Logger::Warning<<"Launching "<< g_numThreads <<" threads"<<endl; |
1849 | for(unsigned int n=0; n < g_numThreads; ++n) { | |
77499b05 | 1850 | pthread_create(&tid, 0, recursorThread, (void*)(long)n); |
76698c6e BH |
1851 | } |
1852 | void* res; | |
49a699c4 BH |
1853 | |
1854 | ||
76698c6e | 1855 | pthread_join(tid, &res); |
bb4bdbaf | 1856 | } |
bb4bdbaf BH |
1857 | return 0; |
1858 | } | |
1859 | ||
1860 | void* recursorThread(void* ptr) | |
1861 | try | |
1862 | { | |
2e2cd8ec | 1863 | t_id=(int) (long) ptr; |
49a699c4 | 1864 | SyncRes tmp(g_now); // make sure it allocates tsstorage before we do anything, like primeHints or so.. |
ac0e821b | 1865 | t_sstorage->domainmap = g_initialDomainMap; |
49a699c4 BH |
1866 | t_allowFrom = g_initialAllowFrom; |
1867 | t_udpclientsocks = new UDPClientSocks(); | |
bd0289fc | 1868 | t_tcpClientCounts = new tcpClientCounts_t(); |
49a699c4 | 1869 | primeHints(); |
674cf0f6 | 1870 | |
49a699c4 BH |
1871 | t_packetCache = new RecursorPacketCache(); |
1872 | ||
1873 | L<<Logger::Warning<<"Done priming cache with root hints"<<endl; | |
1874 | ||
5704e107 | 1875 | t_pdl = new shared_ptr<RecursorLua>(); |
49a699c4 | 1876 | |
674cf0f6 BH |
1877 | try { |
1878 | if(!::arg()["lua-dns-script"].empty()) { | |
5704e107 | 1879 | *t_pdl = shared_ptr<RecursorLua>(new RecursorLua(::arg()["lua-dns-script"])); |
674cf0f6 BH |
1880 | L<<Logger::Warning<<"Loaded 'lua' script from '"<<::arg()["lua-dns-script"]<<"'"<<endl; |
1881 | } | |
1882 | ||
1883 | } | |
1884 | catch(std::exception &e) { | |
1885 | L<<Logger::Error<<"Failed to load 'lua' script from '"<<::arg()["lua-dns-script"]<<"': "<<e.what()<<endl; | |
1886 | exit(99); | |
1887 | } | |
1888 | ||
77499b05 BH |
1889 | t_traceRegex = new shared_ptr<Regex>(); |
1890 | ||
1891 | ||
b3b5459d BH |
1892 | t_remotes = new RemoteKeeper(); |
1893 | t_remotes->remotes.resize(::arg().asNum("remotes-ringbuffer-entries") / g_numThreads); | |
1894 | ||
1895 | if(!t_remotes->remotes.empty()) | |
1896 | memset(&t_remotes->remotes[0], 0, t_remotes->remotes.size() * sizeof(RemoteKeeper::remotes_t::value_type)); | |
1897 | ||
1898 | ||
bb4bdbaf BH |
1899 | MT=new MTasker<PacketID,string>(::arg().asNum("stack-size")); |
1900 | ||
bb4bdbaf BH |
1901 | PacketID pident; |
1902 | ||
1903 | t_fdm=getMultiplexer(); | |
f3d1d67b | 1904 | if(!t_id) { |
9097239c | 1905 | if(::arg().mustDo("experimental-json-interface")) { |
f3d1d67b | 1906 | L<<Logger::Warning << "Enabling JSON interface" << endl; |
8989097d CH |
1907 | try { |
1908 | new JWebserver(t_fdm); | |
1909 | } | |
1910 | catch(PDNSException &e) { | |
1911 | L<<Logger::Error<<"Exception: "<<e.reason<<endl; | |
1912 | exit(99); | |
1913 | } | |
f3d1d67b | 1914 | } |
83252304 | 1915 | L<<Logger::Error<<"Enabled '"<< t_fdm->getName() << "' multiplexer"<<endl; |
f3d1d67b | 1916 | } |
83252304 | 1917 | |
49a699c4 | 1918 | t_fdm->addReadFD(g_pipes[t_id].readToThread, handlePipeRequest); |
83252304 | 1919 | |
1bc3c142 BH |
1920 | if(!g_weDistributeQueries || !t_id) // if we distribute queries, only t_id = 0 listens |
1921 | for(deferredAdd_t::const_iterator i=deferredAdd.begin(); i!=deferredAdd.end(); ++i) | |
1922 | t_fdm->addReadFD(i->first, i->second); | |
f7c1d4e3 | 1923 | |
674cf0f6 | 1924 | if(!t_id) { |
674cf0f6 BH |
1925 | t_fdm->addReadFD(s_rcc.d_fd, handleRCC); // control channel |
1926 | } | |
1bc3c142 | 1927 | |
f7c1d4e3 | 1928 | unsigned int maxTcpClients=::arg().asNum("max-tcp-clients"); |
f7c1d4e3 | 1929 | |
f7c1d4e3 | 1930 | bool listenOnTCP(true); |
49a699c4 | 1931 | |
3427fa8a | 1932 | counter=0; // used to periodically execute certain tasks |
f7c1d4e3 | 1933 | for(;;) { |
ac0e821b | 1934 | while(MT->schedule(&g_now)); // MTasker letting the mthreads do their thing |
f7c1d4e3 | 1935 | |
3427fa8a BH |
1936 | if(!(counter%500)) { |
1937 | MT->makeThread(houseKeeping, 0); | |
f7c1d4e3 BH |
1938 | } |
1939 | ||
d2392145 | 1940 | if(!(counter%55)) { |
d8f6d49f | 1941 | typedef vector<pair<int, FDMultiplexer::funcparam_t> > expired_t; |
bb4bdbaf | 1942 | expired_t expired=t_fdm->getTimeouts(g_now); |
4957a608 | 1943 | |
f7c1d4e3 | 1944 | for(expired_t::iterator i=expired.begin() ; i != expired.end(); ++i) { |
cd989c87 | 1945 | shared_ptr<TCPConnection> conn=any_cast<shared_ptr<TCPConnection> >(i->second); |
4957a608 | 1946 | if(g_logCommonErrors) |
cd989c87 | 1947 | L<<Logger::Warning<<"Timeout from remote TCP client "<< conn->d_remote.toString() <<endl; |
4957a608 | 1948 | t_fdm->removeReadFD(i->first); |
f7c1d4e3 BH |
1949 | } |
1950 | } | |
1951 | ||
1952 | counter++; | |
1953 | ||
3427fa8a | 1954 | if(!t_id && statsWanted) { |
f7c1d4e3 BH |
1955 | doStats(); |
1956 | } | |
1957 | ||
1958 | Utility::gettimeofday(&g_now, 0); | |
bb4bdbaf | 1959 | t_fdm->run(&g_now); |
3ea54bf0 | 1960 | // 'run' updates g_now for us |
f7c1d4e3 BH |
1961 | |
1962 | if(listenOnTCP) { | |
50a5ef72 | 1963 | if(TCPConnection::getCurrentConnections() > maxTcpClients) { // shutdown, too many connections |
4957a608 BH |
1964 | for(tcpListenSockets_t::iterator i=g_tcpListenSockets.begin(); i != g_tcpListenSockets.end(); ++i) |
1965 | t_fdm->removeReadFD(*i); | |
1966 | listenOnTCP=false; | |
f7c1d4e3 BH |
1967 | } |
1968 | } | |
1969 | else { | |
50a5ef72 | 1970 | if(TCPConnection::getCurrentConnections() <= maxTcpClients) { // reenable |
4957a608 BH |
1971 | for(tcpListenSockets_t::iterator i=g_tcpListenSockets.begin(); i != g_tcpListenSockets.end(); ++i) |
1972 | t_fdm->addReadFD(*i, handleNewTCPQuestion); | |
1973 | listenOnTCP=true; | |
f7c1d4e3 BH |
1974 | } |
1975 | } | |
1976 | } | |
1977 | } | |
3f81d239 | 1978 | catch(PDNSException &ae) { |
bb4bdbaf BH |
1979 | L<<Logger::Error<<"Exception: "<<ae.reason<<endl; |
1980 | return 0; | |
1981 | } | |
1982 | catch(std::exception &e) { | |
1983 | L<<Logger::Error<<"STL Exception: "<<e.what()<<endl; | |
1984 | return 0; | |
1985 | } | |
1986 | catch(...) { | |
1987 | L<<Logger::Error<<"any other exception in main: "<<endl; | |
1988 | return 0; | |
1989 | } | |
1990 | ||
51e2144e | 1991 | |
288f4aa9 BH |
1992 | int main(int argc, char **argv) |
1993 | { | |
dbd23fc2 BH |
1994 | g_argc = argc; |
1995 | g_argv = argv; | |
5e3de507 | 1996 | g_stats.startupTime=time(0); |
ba1a571d | 1997 | versionSetProduct("Recursor"); |
8a63d3ce | 1998 | reportBasicTypes(); |
0007c2e5 | 1999 | reportOtherTypes(); |
ea634573 | 2000 | |
22030c37 | 2001 | int ret = EXIT_SUCCESS; |
caa6eefa | 2002 | |
288f4aa9 | 2003 | try { |
f888311c | 2004 | ::arg().set("stack-size","stack size per mthread")="200000"; |
2e3d8a19 BH |
2005 | ::arg().set("soa-minimum-ttl","Don't change")="0"; |
2006 | ::arg().set("soa-serial-offset","Don't change")="0"; | |
2007 | ::arg().set("no-shuffle","Don't change")="off"; | |
f555e92e | 2008 | ::arg().set("additional-processing","turn on to do additional processing")="off"; |
2e3d8a19 BH |
2009 | ::arg().set("aaaa-additional-processing","turn on to do AAAA additional processing (slow)")="off"; |
2010 | ::arg().set("local-port","port to listen on")="53"; | |
32252594 | 2011 | ::arg().set("local-address","IP addresses to listen on, separated by spaces or commas. Also accepts ports.")="127.0.0.1"; |
77499b05 | 2012 | ::arg().set("trace","if we should output heaps of logging. set to 'fail' to only log failing domains")="off"; |
2e3d8a19 | 2013 | ::arg().set("daemon","Operate as a daemon")="yes"; |
0e9d9ce2 | 2014 | ::arg().set("log-common-errors","If we should log rather common errors")="yes"; |
2e3d8a19 BH |
2015 | ::arg().set("chroot","switch to chroot jail")=""; |
2016 | ::arg().set("setgid","If set, change group id to this gid for more security")=""; | |
2017 | ::arg().set("setuid","If set, change user id to this uid for more security")=""; | |
5b0ddd18 | 2018 | ::arg().set("network-timeout", "Wait this nummer of milliseconds for network i/o")="1500"; |
bb4bdbaf | 2019 | ::arg().set("threads", "Launch this number of threads")="2"; |
1bc3c142 | 2020 | ::arg().set("processes", "Launch this number of processes (EXPERIMENTAL, DO NOT CHANGE)")="1"; |
5124de27 | 2021 | ::arg().set("config-name","Name of this virtual configuration - will rename the binary image")=""; |
9097239c PD |
2022 | ::arg().set( "experimental-logfile", "Filename of the log file for JSON parser" )= "/var/log/pdns.log"; |
2023 | ::arg().setSwitch( "experimental-json-interface", "If we should run a JSON webserver") = "no"; | |
c038218b | 2024 | ::arg().set("quiet","Suppress logging of questions and answers")=""; |
f27e6356 | 2025 | ::arg().set("logging-facility","Facility to log messages as. 0 corresponds to local0")=""; |
2e3d8a19 | 2026 | ::arg().set("config-dir","Location of configuration directory (recursor.conf)")=SYSCONFDIR; |
fdbf35ac BH |
2027 | ::arg().set("socket-owner","Owner of socket")=""; |
2028 | ::arg().set("socket-group","Group of socket")=""; | |
2029 | ::arg().set("socket-mode", "Permissions for socket")=""; | |
fdbf35ac | 2030 | |
2e3d8a19 BH |
2031 | ::arg().set("socket-dir","Where the controlsocket will live")=LOCALSTATEDIR; |
2032 | ::arg().set("delegation-only","Which domains we only accept delegations from")=""; | |
2033 | ::arg().set("query-local-address","Source IP address for sending queries")="0.0.0.0"; | |
d4fb76e9 | 2034 | ::arg().set("query-local-address6","Source IPv6 address for sending queries. IF UNSET, IPv6 WILL NOT BE USED FOR OUTGOING QUERIES")=""; |
2e3d8a19 | 2035 | ::arg().set("client-tcp-timeout","Timeout in seconds when talking to TCP clients")="2"; |
85c32340 | 2036 | ::arg().set("max-mthreads", "Maximum number of simultaneous Mtasker threads")="2048"; |
2e3d8a19 BH |
2037 | ::arg().set("max-tcp-clients","Maximum number of simultaneous TCP clients")="128"; |
2038 | ::arg().set("hint-file", "If set, load root hints from this file")=""; | |
b45eb27c | 2039 | ::arg().set("max-cache-entries", "If set, maximum number of entries in the main cache")="1000000"; |
a9af3782 | 2040 | ::arg().set("max-negative-ttl", "maximum number of seconds to keep a negative cached entry in memory")="3600"; |
c3e753c7 | 2041 | ::arg().set("max-cache-ttl", "maximum number of seconds to keep a cached entry in memory")="86400"; |
1051f8a9 | 2042 | ::arg().set("packetcache-ttl", "maximum number of seconds to keep a cached entry in packetcache")="3600"; |
927c12b0 | 2043 | ::arg().set("max-packetcache-entries", "maximum number of entries to keep in the packetcache")="500000"; |
1051f8a9 | 2044 | ::arg().set("packetcache-servfail-ttl", "maximum number of seconds to keep a cached servfail entry in packetcache")="60"; |
7f7b8d55 | 2045 | ::arg().set("server-id", "Returned when queried for 'server.id' TXT or NSID, defaults to hostname")=""; |
a9af3782 | 2046 | ::arg().set("remotes-ringbuffer-entries", "maximum number of packets to store statistics for")="0"; |
ba1a571d | 2047 | ::arg().set("version-string", "string reported on version.pdns or version.bind")=fullVersionString(); |
49a699c4 | 2048 | ::arg().set("allow-from", "If set, only allow these comma separated netmasks to recurse")=LOCAL_NETS; |
2c95fc65 | 2049 | ::arg().set("allow-from-file", "If set, load allowed netmasks from this file")=""; |
51e2144e | 2050 | ::arg().set("entropy-source", "If set, read entropy from this file")="/dev/urandom"; |
49a699c4 | 2051 | ::arg().set("dont-query", "If set, do not query these netmasks for DNS data")=LOCAL_NETS; |
4e120339 | 2052 | ::arg().set("max-tcp-per-client", "If set, maximum number of TCP sessions per client (IP address)")="0"; |
0d5f0a9f | 2053 | ::arg().set("spoof-nearmiss-max", "If non-zero, assume spoofing after this many near misses")="20"; |
4ef015cd | 2054 | ::arg().set("single-socket", "If set, only use a single socket for outgoing queries")="off"; |
5605c067 BH |
2055 | ::arg().set("auth-zones", "Zones for which we have authoritative data, comma separated domain=file pairs ")=""; |
2056 | ::arg().set("forward-zones", "Zones for which we forward queries, comma separated domain=ip pairs")=""; | |
927c12b0 BH |
2057 | ::arg().set("forward-zones-recurse", "Zones for which we forward queries with recursion bit, comma separated domain=ip pairs")=""; |
2058 | ::arg().set("forward-zones-file", "File with (+)domain=ip pairs for forwarding")=""; | |
5605c067 | 2059 | ::arg().set("export-etc-hosts", "If we should serve up contents from /etc/hosts")="off"; |
ac0b4eb3 | 2060 | ::arg().set("export-etc-hosts-search-suffix", "Also serve up the contents of /etc/hosts with this suffix")=""; |
3ea54bf0 | 2061 | ::arg().set("etc-hosts-file", "Path to 'hosts' file")="/etc/hosts"; |
9bc8c14c | 2062 | ::arg().set("serve-rfc1918", "If we should be authoritative for RFC 1918 private IP space")=""; |
4485aa35 | 2063 | ::arg().set("lua-dns-script", "Filename containing an optional 'lua' script that will be used to modify dns answers")=""; |
578361b3 | 2064 | // ::arg().setSwitch( "disable-edns-ping", "Disable EDNSPing - EXPERIMENTAL, LEAVE DISABLED" )= "no"; |
2065 | ::arg().setSwitch( "disable-edns", "Disable EDNS - EXPERIMENTAL, LEAVE DISABLED" )= ""; | |
1bc3c142 BH |
2066 | ::arg().setSwitch( "disable-packetcache", "Disable packetcache" )= "no"; |
2067 | ::arg().setSwitch( "pdns-distributes-queries", "If PowerDNS itself should distribute queries over threads (EXPERIMENTAL)")="no"; | |
e661a20b | 2068 | ::arg().setSwitch( "any-to-tcp","Answer ANY queries with tc=1, shunting to TCP" )="no"; |
a09a8ce0 PD |
2069 | ::arg().set("udp-truncation-threshold", "Maximum UDP response size before we truncate")="1680"; |
2070 | ||
68e6df3c | 2071 | ::arg().set("include-dir","Include *.conf files from this directory")=""; |
2e3d8a19 BH |
2072 | |
2073 | ::arg().setCmd("help","Provide a helpful message"); | |
ba1a571d | 2074 | ::arg().setCmd("version","Print version string"); |
d5141417 | 2075 | ::arg().setCmd("config","Output blank configuration"); |
f27e6356 | 2076 | L.toConsole(Logger::Info); |
2e3d8a19 | 2077 | ::arg().laxParse(argc,argv); // do a lax parse |
c75a6a9e | 2078 | |
5124de27 RA |
2079 | if(::arg()["config-name"]!="") |
2080 | s_programname+="-"+::arg()["config-name"]; | |
2081 | ||
2082 | ||
577cf284 BH |
2083 | if(::arg().mustDo("config")) { |
2084 | cout<<::arg().configstring()<<endl; | |
2085 | exit(0); | |
2086 | } | |
2087 | ||
2088 | ||
5124de27 | 2089 | string configname=::arg()["config-dir"]+"/"+s_programname+".conf"; |
c75a6a9e BH |
2090 | cleanSlashes(configname); |
2091 | ||
2e3d8a19 | 2092 | if(!::arg().file(configname.c_str())) |
c75a6a9e BH |
2093 | L<<Logger::Warning<<"Unable to parse configuration file '"<<configname<<"'"<<endl; |
2094 | ||
2e3d8a19 | 2095 | ::arg().parse(argc,argv); |
c836dc19 | 2096 | |
2e3d8a19 | 2097 | ::arg().set("delegation-only")=toLower(::arg()["delegation-only"]); |
562588a3 | 2098 | |
2e3d8a19 | 2099 | if(::arg().mustDo("help")) { |
b636533b | 2100 | cerr<<"syntax:"<<endl<<endl; |
2e3d8a19 | 2101 | cerr<<::arg().helpstring(::arg()["help"])<<endl; |
b636533b BH |
2102 | exit(99); |
2103 | } | |
5e3de507 | 2104 | if(::arg().mustDo("version")) { |
ba1a571d | 2105 | showProductVersion(); |
3613a51c | 2106 | showBuildConfiguration(); |
5e3de507 BH |
2107 | exit(99); |
2108 | } | |
b636533b | 2109 | |
f7c1d4e3 | 2110 | serviceMain(argc, argv); |
288f4aa9 | 2111 | } |
3f81d239 | 2112 | catch(PDNSException &ae) { |
c836dc19 | 2113 | L<<Logger::Error<<"Exception: "<<ae.reason<<endl; |
22030c37 | 2114 | ret=EXIT_FAILURE; |
288f4aa9 | 2115 | } |
fdbf35ac | 2116 | catch(std::exception &e) { |
c836dc19 | 2117 | L<<Logger::Error<<"STL Exception: "<<e.what()<<endl; |
22030c37 | 2118 | ret=EXIT_FAILURE; |
288f4aa9 BH |
2119 | } |
2120 | catch(...) { | |
c836dc19 | 2121 | L<<Logger::Error<<"any other exception in main: "<<endl; |
22030c37 | 2122 | ret=EXIT_FAILURE; |
288f4aa9 | 2123 | } |
caa6eefa | 2124 | |
22030c37 | 2125 | return ret; |
288f4aa9 | 2126 | } |