]>
Commit | Line | Data |
---|---|---|
12c86877 | 1 | /* |
12471842 PL |
2 | * This file is part of PowerDNS or dnsdist. |
3 | * Copyright -- PowerDNS.COM B.V. and its contributors | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of version 2 of the GNU General Public License as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * In addition, for the avoidance of any doubt, permission is granted to | |
10 | * link this program with OpenSSL and to (re)distribute the binaries | |
11 | * produced as the result of such linking. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
21 | */ | |
870a0fe4 AT |
22 | #ifdef HAVE_CONFIG_H |
23 | #include "config.h" | |
24 | #endif | |
705f31ae | 25 | #include <sys/param.h> |
22cf1fda | 26 | #include <sys/socket.h> |
3897b9e1 | 27 | #include <fcntl.h> |
705f31ae BH |
28 | #include <netdb.h> |
29 | #include <sys/time.h> | |
30 | #include <time.h> | |
3a8a4d68 | 31 | #include <sys/resource.h> |
705f31ae | 32 | #include <netinet/in.h> |
76cb4593 | 33 | #include <sys/un.h> |
705f31ae | 34 | #include <unistd.h> |
8290ad9f | 35 | #include <fstream> |
12c86877 BH |
36 | #include "misc.hh" |
37 | #include <vector> | |
38 | #include <sstream> | |
39 | #include <errno.h> | |
1258abe0 | 40 | #include <cstring> |
c4bee46c | 41 | #include <iostream> |
a9b6db56 | 42 | #include <sys/types.h> |
43 | #include <dirent.h> | |
705f31ae | 44 | #include <algorithm> |
6e2514e4 | 45 | #include <boost/optional.hpp> |
fab091b9 | 46 | #include <poll.h> |
12c86877 | 47 | #include <iomanip> |
149d0144 | 48 | #include <netinet/tcp.h> |
12c86877 BH |
49 | #include <string.h> |
50 | #include <stdlib.h> | |
51 | #include <stdio.h> | |
5c409fa2 | 52 | #include "pdnsexception.hh" |
c6566265 | 53 | #include <sys/types.h> |
040712e0 | 54 | #include <boost/algorithm/string.hpp> |
65d8e171 | 55 | #include "iputils.hh" |
e325f20c | 56 | #include "dnsparser.hh" |
ffb07158 | 57 | #include <sys/types.h> |
58 | #include <pwd.h> | |
59 | #include <grp.h> | |
6c78a20e R |
60 | #ifdef __FreeBSD__ |
61 | # include <pthread_np.h> | |
62 | #endif | |
4d39d7f3 TIH |
63 | #ifdef __NetBSD__ |
64 | # include <pthread.h> | |
65 | # include <sched.h> | |
66 | #endif | |
a61e8e59 | 67 | |
1e08edde BH |
68 | bool g_singleThreaded; |
69 | ||
a683e8bd | 70 | size_t writen2(int fd, const void *buf, size_t count) |
040712e0 BH |
71 | { |
72 | const char *ptr = (char*)buf; | |
73 | const char *eptr = ptr + count; | |
3ddb9247 | 74 | |
a683e8bd | 75 | ssize_t res; |
040712e0 BH |
76 | while(ptr != eptr) { |
77 | res = ::write(fd, ptr, eptr - ptr); | |
78 | if(res < 0) { | |
79 | if (errno == EAGAIN) | |
4957a608 | 80 | throw std::runtime_error("used writen2 on non-blocking socket, got EAGAIN"); |
040712e0 | 81 | else |
4957a608 | 82 | unixDie("failed in writen2"); |
040712e0 BH |
83 | } |
84 | else if (res == 0) | |
85 | throw std::runtime_error("could not write all bytes, got eof in writen2"); | |
3ddb9247 | 86 | |
a683e8bd | 87 | ptr += (size_t) res; |
040712e0 | 88 | } |
3ddb9247 | 89 | |
040712e0 BH |
90 | return count; |
91 | } | |
92 | ||
a683e8bd | 93 | size_t readn2(int fd, void* buffer, size_t len) |
36fbf590 | 94 | { |
a683e8bd RG |
95 | size_t pos=0; |
96 | ssize_t res; | |
36fbf590 | 97 | for(;;) { |
98 | res = read(fd, (char*)buffer + pos, len - pos); | |
3ddb9247 | 99 | if(res == 0) |
3f6d07a4 | 100 | throw runtime_error("EOF while reading message"); |
36fbf590 | 101 | if(res < 0) { |
102 | if (errno == EAGAIN) | |
3f6d07a4 | 103 | throw std::runtime_error("used readn2 on non-blocking socket, got EAGAIN"); |
36fbf590 | 104 | else |
3f6d07a4 | 105 | unixDie("failed in readn2"); |
3ddb9247 PD |
106 | } |
107 | ||
a683e8bd | 108 | pos+=(size_t)res; |
36fbf590 | 109 | if(pos == len) |
110 | break; | |
111 | } | |
112 | return len; | |
113 | } | |
114 | ||
9396d955 | 115 | size_t readn2WithTimeout(int fd, void* buffer, size_t len, int idleTimeout, int totalTimeout) |
3f6d07a4 RG |
116 | { |
117 | size_t pos = 0; | |
9396d955 RG |
118 | time_t start = 0; |
119 | int remainingTime = totalTimeout; | |
120 | if (totalTimeout) { | |
121 | start = time(NULL); | |
122 | } | |
123 | ||
3f6d07a4 RG |
124 | do { |
125 | ssize_t got = read(fd, (char *)buffer + pos, len - pos); | |
126 | if (got > 0) { | |
127 | pos += (size_t) got; | |
128 | } | |
129 | else if (got == 0) { | |
130 | throw runtime_error("EOF while reading message"); | |
131 | } | |
132 | else { | |
133 | if (errno == EAGAIN) { | |
9396d955 | 134 | int res = waitForData(fd, (totalTimeout == 0 || idleTimeout <= remainingTime) ? idleTimeout : remainingTime); |
3f6d07a4 RG |
135 | if (res > 0) { |
136 | /* there is data available */ | |
137 | } | |
138 | else if (res == 0) { | |
139 | throw runtime_error("Timeout while waiting for data to read"); | |
140 | } else { | |
141 | throw runtime_error("Error while waiting for data to read"); | |
142 | } | |
143 | } | |
144 | else { | |
145 | unixDie("failed in readn2WithTimeout"); | |
146 | } | |
147 | } | |
9396d955 RG |
148 | |
149 | if (totalTimeout) { | |
150 | time_t now = time(NULL); | |
151 | int elapsed = now - start; | |
152 | if (elapsed >= remainingTime) { | |
153 | throw runtime_error("Timeout while reading data"); | |
154 | } | |
155 | start = now; | |
156 | remainingTime -= elapsed; | |
157 | } | |
3f6d07a4 RG |
158 | } |
159 | while (pos < len); | |
160 | ||
161 | return len; | |
162 | } | |
163 | ||
a683e8bd | 164 | size_t writen2WithTimeout(int fd, const void * buffer, size_t len, int timeout) |
3f6d07a4 RG |
165 | { |
166 | size_t pos = 0; | |
167 | do { | |
168 | ssize_t written = write(fd, (char *)buffer + pos, len - pos); | |
169 | ||
170 | if (written > 0) { | |
171 | pos += (size_t) written; | |
172 | } | |
173 | else if (written == 0) | |
174 | throw runtime_error("EOF while writing message"); | |
175 | else { | |
176 | if (errno == EAGAIN) { | |
177 | int res = waitForRWData(fd, false, timeout, 0); | |
178 | if (res > 0) { | |
179 | /* there is room available */ | |
180 | } | |
181 | else if (res == 0) { | |
182 | throw runtime_error("Timeout while waiting to write data"); | |
183 | } else { | |
184 | throw runtime_error("Error while waiting for room to write data"); | |
185 | } | |
186 | } | |
187 | else { | |
188 | unixDie("failed in write2WithTimeout"); | |
189 | } | |
190 | } | |
191 | } | |
192 | while (pos < len); | |
193 | ||
194 | return len; | |
195 | } | |
12c86877 | 196 | |
cc3afe25 BH |
197 | string nowTime() |
198 | { | |
74ab661c CH |
199 | time_t now = time(nullptr); |
200 | struct tm* tm = localtime(&now); | |
201 | char buffer[30]; | |
202 | // YYYY-mm-dd HH:MM:SS TZOFF | |
203 | strftime(buffer, sizeof(buffer), "%F %T %z", tm); | |
204 | buffer[sizeof(buffer)-1] = '\0'; | |
205 | return buffer; | |
cc3afe25 | 206 | } |
12c86877 | 207 | |
092f210a | 208 | uint16_t getShort(const unsigned char *p) |
0d8612f2 BH |
209 | { |
210 | return p[0] * 256 + p[1]; | |
211 | } | |
212 | ||
213 | ||
092f210a | 214 | uint16_t getShort(const char *p) |
0d8612f2 BH |
215 | { |
216 | return getShort((const unsigned char *)p); | |
217 | } | |
218 | ||
092f210a | 219 | uint32_t getLong(const unsigned char* p) |
b636533b BH |
220 | { |
221 | return (p[0]<<24) + (p[1]<<16) + (p[2]<<8) + p[3]; | |
222 | } | |
223 | ||
092f210a | 224 | uint32_t getLong(const char* p) |
b636533b BH |
225 | { |
226 | return getLong((unsigned char *)p); | |
227 | } | |
228 | ||
a683e8bd | 229 | static bool ciEqual(const string& a, const string& b) |
49bd5a20 BH |
230 | { |
231 | if(a.size()!=b.size()) | |
232 | return false; | |
233 | ||
234 | string::size_type pos=0, epos=a.size(); | |
235 | for(;pos < epos; ++pos) | |
236 | if(dns_tolower(a[pos])!=dns_tolower(b[pos])) | |
237 | return false; | |
238 | return true; | |
239 | } | |
240 | ||
728485ca | 241 | /** does domain end on suffix? Is smart about "wwwds9a.nl" "ds9a.nl" not matching */ |
a683e8bd | 242 | static bool endsOn(const string &domain, const string &suffix) |
728485ca | 243 | { |
49bd5a20 | 244 | if( suffix.empty() || ciEqual(domain, suffix) ) |
728485ca | 245 | return true; |
7738a23f | 246 | |
728485ca BH |
247 | if(domain.size()<=suffix.size()) |
248 | return false; | |
3ddb9247 | 249 | |
49bd5a20 | 250 | string::size_type dpos=domain.size()-suffix.size()-1, spos=0; |
7738a23f | 251 | |
49bd5a20 BH |
252 | if(domain[dpos++]!='.') |
253 | return false; | |
728485ca | 254 | |
49bd5a20 BH |
255 | for(; dpos < domain.size(); ++dpos, ++spos) |
256 | if(dns_tolower(domain[dpos]) != dns_tolower(suffix[spos])) | |
257 | return false; | |
258 | ||
259 | return true; | |
260 | } | |
f2c11a48 | 261 | |
a683e8bd RG |
262 | /** strips a domain suffix from a domain, returns true if it stripped */ |
263 | bool stripDomainSuffix(string *qname, const string &domain) | |
264 | { | |
265 | if(!endsOn(*qname, domain)) | |
266 | return false; | |
267 | ||
268 | if(toLower(*qname)==toLower(domain)) | |
269 | *qname="@"; | |
270 | else { | |
271 | if((*qname)[qname->size()-domain.size()-1]!='.') | |
272 | return false; | |
273 | ||
274 | qname->resize(qname->size()-domain.size()-1); | |
275 | } | |
276 | return true; | |
277 | } | |
278 | ||
32252594 | 279 | static void parseService4(const string &descr, ServiceTuple &st) |
12c86877 BH |
280 | { |
281 | vector<string>parts; | |
282 | stringtok(parts,descr,":"); | |
52936200 | 283 | if(parts.empty()) |
3f81d239 | 284 | throw PDNSException("Unable to parse '"+descr+"' as a service"); |
12c86877 BH |
285 | st.host=parts[0]; |
286 | if(parts.size()>1) | |
335da0ba | 287 | st.port=pdns_stou(parts[1]); |
12c86877 BH |
288 | } |
289 | ||
32252594 BH |
290 | static void parseService6(const string &descr, ServiceTuple &st) |
291 | { | |
292 | string::size_type pos=descr.find(']'); | |
293 | if(pos == string::npos) | |
3f81d239 | 294 | throw PDNSException("Unable to parse '"+descr+"' as an IPv6 service"); |
32252594 BH |
295 | |
296 | st.host=descr.substr(1, pos-1); | |
297 | if(pos + 2 < descr.length()) | |
335da0ba | 298 | st.port=pdns_stou(descr.substr(pos+2)); |
32252594 BH |
299 | } |
300 | ||
301 | ||
302 | void parseService(const string &descr, ServiceTuple &st) | |
303 | { | |
304 | if(descr.empty()) | |
3f81d239 | 305 | throw PDNSException("Unable to parse '"+descr+"' as a service"); |
32252594 BH |
306 | |
307 | vector<string> parts; | |
308 | stringtok(parts, descr, ":"); | |
309 | ||
310 | if(descr[0]=='[') { | |
311 | parseService6(descr, st); | |
312 | } | |
313 | else if(descr[0]==':' || parts.size() > 2 || descr.find("::") != string::npos) { | |
314 | st.host=descr; | |
315 | } | |
316 | else { | |
317 | parseService4(descr, st); | |
318 | } | |
319 | } | |
12c86877 | 320 | |
1fb3f0fc | 321 | // returns -1 in case if error, 0 if no data is available, 1 if there is. In the first two cases, errno is set |
a7d50153 | 322 | int waitForData(int fd, int seconds, int useconds) |
649a88df BH |
323 | { |
324 | return waitForRWData(fd, true, seconds, useconds); | |
325 | } | |
326 | ||
51959320 | 327 | int waitForRWData(int fd, bool waitForRead, int seconds, int useconds, bool* error, bool* disconnected) |
12c86877 | 328 | { |
1258abe0 BH |
329 | int ret; |
330 | ||
fab091b9 BH |
331 | struct pollfd pfd; |
332 | memset(&pfd, 0, sizeof(pfd)); | |
333 | pfd.fd = fd; | |
3ddb9247 | 334 | |
649a88df | 335 | if(waitForRead) |
fab091b9 | 336 | pfd.events=POLLIN; |
649a88df | 337 | else |
fab091b9 | 338 | pfd.events=POLLOUT; |
1258abe0 | 339 | |
6b3d4330 | 340 | ret = poll(&pfd, 1, seconds * 1000 + useconds/1000); |
e07c3801 | 341 | if (ret > 0) { |
51959320 RG |
342 | if (error && (pfd.revents & POLLERR)) { |
343 | *error = true; | |
344 | } | |
345 | if (disconnected && (pfd.revents & POLLHUP)) { | |
346 | *disconnected = true; | |
347 | } | |
348 | } | |
1258abe0 | 349 | |
12c86877 BH |
350 | return ret; |
351 | } | |
352 | ||
a71bee29 | 353 | // returns -1 in case of error, 0 if no data is available, 1 if there is. In the first two cases, errno is set |
dc058f65 | 354 | int waitForMultiData(const set<int>& fds, const int seconds, const int useconds, int* fdOut) { |
d529011f PL |
355 | set<int> realFDs; |
356 | for (const auto& fd : fds) { | |
357 | if (fd >= 0 && realFDs.count(fd) == 0) { | |
358 | realFDs.insert(fd); | |
359 | } | |
360 | } | |
361 | ||
dcc0e65d | 362 | std::vector<struct pollfd> pfds(realFDs.size()); |
c2a16005 | 363 | memset(pfds.data(), 0, realFDs.size()*sizeof(struct pollfd)); |
d529011f PL |
364 | int ctr = 0; |
365 | for (const auto& fd : realFDs) { | |
366 | pfds[ctr].fd = fd; | |
367 | pfds[ctr].events = POLLIN; | |
368 | ctr++; | |
369 | } | |
370 | ||
371 | int ret; | |
372 | if(seconds >= 0) | |
c2a16005 | 373 | ret = poll(pfds.data(), realFDs.size(), seconds * 1000 + useconds/1000); |
d529011f | 374 | else |
c2a16005 | 375 | ret = poll(pfds.data(), realFDs.size(), -1); |
d529011f PL |
376 | if(ret <= 0) |
377 | return ret; | |
378 | ||
379 | set<int> pollinFDs; | |
aca9c605 PL |
380 | for (const auto& pfd : pfds) { |
381 | if (pfd.revents & POLLIN) { | |
382 | pollinFDs.insert(pfd.fd); | |
d529011f | 383 | } |
d529011f PL |
384 | } |
385 | set<int>::const_iterator it(pollinFDs.begin()); | |
386 | advance(it, random() % pollinFDs.size()); | |
dc058f65 | 387 | *fdOut = *it; |
d529011f PL |
388 | return 1; |
389 | } | |
390 | ||
a71bee29 | 391 | // returns -1 in case of error, 0 if no data is available, 1 if there is. In the first two cases, errno is set |
f4ff5929 BH |
392 | int waitFor2Data(int fd1, int fd2, int seconds, int useconds, int*fd) |
393 | { | |
394 | int ret; | |
395 | ||
396 | struct pollfd pfds[2]; | |
397 | memset(&pfds[0], 0, 2*sizeof(struct pollfd)); | |
398 | pfds[0].fd = fd1; | |
399 | pfds[1].fd = fd2; | |
3ddb9247 | 400 | |
f4ff5929 BH |
401 | pfds[0].events= pfds[1].events = POLLIN; |
402 | ||
403 | int nsocks = 1 + (fd2 >= 0); // fd2 can optionally be -1 | |
404 | ||
405 | if(seconds >= 0) | |
406 | ret = poll(pfds, nsocks, seconds * 1000 + useconds/1000); | |
407 | else | |
408 | ret = poll(pfds, nsocks, -1); | |
409 | if(!ret || ret < 0) | |
410 | return ret; | |
3ddb9247 | 411 | |
f4ff5929 BH |
412 | if((pfds[0].revents & POLLIN) && !(pfds[1].revents & POLLIN)) |
413 | *fd = pfds[0].fd; | |
414 | else if((pfds[1].revents & POLLIN) && !(pfds[0].revents & POLLIN)) | |
415 | *fd = pfds[1].fd; | |
416 | else if(ret == 2) { | |
417 | *fd = pfds[random()%2].fd; | |
418 | } | |
419 | else | |
420 | *fd = -1; // should never happen | |
3ddb9247 | 421 | |
f4ff5929 BH |
422 | return 1; |
423 | } | |
424 | ||
12c86877 BH |
425 | |
426 | string humanDuration(time_t passed) | |
427 | { | |
428 | ostringstream ret; | |
429 | if(passed<60) | |
430 | ret<<passed<<" seconds"; | |
431 | else if(passed<3600) | |
9e04108d | 432 | ret<<std::setprecision(2)<<passed/60.0<<" minutes"; |
12c86877 | 433 | else if(passed<86400) |
9e04108d | 434 | ret<<std::setprecision(3)<<passed/3600.0<<" hours"; |
12c86877 | 435 | else if(passed<(86400*30.41)) |
9e04108d | 436 | ret<<std::setprecision(3)<<passed/86400.0<<" days"; |
12c86877 | 437 | else |
9e04108d | 438 | ret<<std::setprecision(3)<<passed/(86400*30.41)<<" months"; |
12c86877 BH |
439 | |
440 | return ret.str(); | |
441 | } | |
442 | ||
443 | DTime::DTime() | |
444 | { | |
eefd15f9 | 445 | // set(); // saves lots of gettimeofday calls |
55b6512d | 446 | d_set.tv_sec=d_set.tv_usec=0; |
12c86877 BH |
447 | } |
448 | ||
8a70e507 | 449 | DTime::DTime(const DTime &dt) : d_set(dt.d_set) |
12c86877 | 450 | { |
12c86877 BH |
451 | } |
452 | ||
453 | time_t DTime::time() | |
454 | { | |
455 | return d_set.tv_sec; | |
456 | } | |
457 | ||
1d329048 BH |
458 | const string unquotify(const string &item) |
459 | { | |
460 | if(item.size()<2) | |
461 | return item; | |
462 | ||
463 | string::size_type bpos=0, epos=item.size(); | |
12c86877 | 464 | |
3ddb9247 | 465 | if(item[0]=='"') |
1d329048 | 466 | bpos=1; |
c4bee46c | 467 | |
1d329048 BH |
468 | if(item[epos-1]=='"') |
469 | epos-=1; | |
470 | ||
c4bee46c | 471 | return item.substr(bpos,epos-bpos); |
1d329048 | 472 | } |
12c86877 BH |
473 | |
474 | void stripLine(string &line) | |
475 | { | |
bdf40704 | 476 | string::size_type pos=line.find_first_of("\r\n"); |
12c86877 BH |
477 | if(pos!=string::npos) { |
478 | line.resize(pos); | |
479 | } | |
480 | } | |
481 | ||
482 | string urlEncode(const string &text) | |
483 | { | |
484 | string ret; | |
485 | for(string::const_iterator i=text.begin();i!=text.end();++i) | |
486 | if(*i==' ')ret.append("%20"); | |
487 | else ret.append(1,*i); | |
488 | return ret; | |
489 | } | |
490 | ||
491 | string getHostname() | |
492 | { | |
0db70140 | 493 | #ifndef MAXHOSTNAMELEN |
76473b92 | 494 | #define MAXHOSTNAMELEN 255 |
0db70140 | 495 | #endif |
ac2bb9e7 | 496 | |
12c86877 BH |
497 | char tmp[MAXHOSTNAMELEN]; |
498 | if(gethostname(tmp, MAXHOSTNAMELEN)) | |
499 | return "UNKNOWN"; | |
500 | ||
501 | return tmp; | |
502 | } | |
503 | ||
504 | string itoa(int i) | |
505 | { | |
506 | ostringstream o; | |
507 | o<<i; | |
508 | return o.str(); | |
509 | } | |
510 | ||
22c9c86a BH |
511 | string uitoa(unsigned int i) // MSVC 6 doesn't grok overloading (un)signed |
512 | { | |
513 | ostringstream o; | |
514 | o<<i; | |
515 | return o.str(); | |
516 | } | |
517 | ||
d88babea KM |
518 | string bitFlip(const string &str) |
519 | { | |
520 | string::size_type pos=0, epos=str.size(); | |
521 | string ret; | |
522 | ret.reserve(epos); | |
523 | for(;pos < epos; ++pos) | |
524 | ret.append(1, ~str[pos]); | |
525 | return ret; | |
526 | } | |
22c9c86a | 527 | |
12c86877 BH |
528 | string stringerror() |
529 | { | |
530 | return strerror(errno); | |
531 | } | |
532 | ||
d3b4137e BH |
533 | string netstringerror() |
534 | { | |
535 | return stringerror(); | |
536 | } | |
d3b4137e | 537 | |
12c86877 BH |
538 | void cleanSlashes(string &str) |
539 | { | |
540 | string::const_iterator i; | |
541 | string out; | |
542 | for(i=str.begin();i!=str.end();++i) { | |
543 | if(*i=='/' && i!=str.begin() && *(i-1)=='/') | |
544 | continue; | |
545 | out.append(1,*i); | |
546 | } | |
547 | str=out; | |
548 | } | |
549 | ||
7b35aa49 | 550 | |
092f210a | 551 | bool IpToU32(const string &str, uint32_t *ip) |
525b8a7c | 552 | { |
4cf26303 BH |
553 | if(str.empty()) { |
554 | *ip=0; | |
555 | return true; | |
556 | } | |
3ddb9247 | 557 | |
092c9cc4 | 558 | struct in_addr inp; |
3897b9e1 | 559 | if(inet_aton(str.c_str(), &inp)) { |
092c9cc4 BH |
560 | *ip=inp.s_addr; |
561 | return true; | |
562 | } | |
563 | return false; | |
525b8a7c BH |
564 | } |
565 | ||
5730f30c BH |
566 | string U32ToIP(uint32_t val) |
567 | { | |
568 | char tmp[17]; | |
9b2244e1 | 569 | snprintf(tmp, sizeof(tmp), "%u.%u.%u.%u", |
4957a608 BH |
570 | (val >> 24)&0xff, |
571 | (val >> 16)&0xff, | |
572 | (val >> 8)&0xff, | |
573 | (val )&0xff); | |
5730f30c BH |
574 | return tmp; |
575 | } | |
576 | ||
37d3f960 | 577 | |
2db9c30e BH |
578 | string makeHexDump(const string& str) |
579 | { | |
580 | char tmp[5]; | |
581 | string ret; | |
ea634573 | 582 | ret.reserve((int)(str.size()*2.2)); |
2db9c30e BH |
583 | |
584 | for(string::size_type n=0;n<str.size();++n) { | |
585 | sprintf(tmp,"%02x ", (unsigned char)str[n]); | |
586 | ret+=tmp; | |
587 | } | |
588 | return ret; | |
589 | } | |
590 | ||
e67e250f | 591 | // shuffle, maintaining some semblance of order |
d190894c | 592 | void shuffle(vector<DNSZoneRecord>& rrs) |
e67e250f | 593 | { |
d190894c | 594 | vector<DNSZoneRecord>::iterator first, second; |
3ddb9247 | 595 | for(first=rrs.begin();first!=rrs.end();++first) |
d190894c | 596 | if(first->dr.d_place==DNSResourceRecord::ANSWER && first->dr.d_type != QType::CNAME) // CNAME must come first |
e67e250f BH |
597 | break; |
598 | for(second=first;second!=rrs.end();++second) | |
d190894c | 599 | if(second->dr.d_place!=DNSResourceRecord::ANSWER) |
e67e250f | 600 | break; |
3ddb9247 | 601 | |
d190894c | 602 | if(second-first > 1) |
e67e250f | 603 | random_shuffle(first,second); |
3ddb9247 | 604 | |
e67e250f | 605 | // now shuffle the additional records |
3ddb9247 | 606 | for(first=second;first!=rrs.end();++first) |
d190894c | 607 | if(first->dr.d_place==DNSResourceRecord::ADDITIONAL && first->dr.d_type != QType::CNAME) // CNAME must come first |
e67e250f BH |
608 | break; |
609 | for(second=first;second!=rrs.end();++second) | |
d190894c | 610 | if(second->dr.d_place!=DNSResourceRecord::ADDITIONAL) |
e67e250f | 611 | break; |
3ddb9247 | 612 | |
e67e250f BH |
613 | if(second-first>1) |
614 | random_shuffle(first,second); | |
615 | ||
616 | // we don't shuffle the rest | |
617 | } | |
88358c9b | 618 | |
e325f20c | 619 | |
620 | // shuffle, maintaining some semblance of order | |
621 | void shuffle(vector<DNSRecord>& rrs) | |
92476c8b | 622 | { |
e325f20c | 623 | vector<DNSRecord>::iterator first, second; |
624 | for(first=rrs.begin();first!=rrs.end();++first) | |
e693ff5a | 625 | if(first->d_place==DNSResourceRecord::ANSWER && first->d_type != QType::CNAME) // CNAME must come first |
e325f20c | 626 | break; |
627 | for(second=first;second!=rrs.end();++second) | |
2cccc377 | 628 | if(second->d_place!=DNSResourceRecord::ANSWER || second->d_type == QType::RRSIG) // leave RRSIGs at the end |
e325f20c | 629 | break; |
630 | ||
631 | if(second-first>1) | |
632 | random_shuffle(first,second); | |
633 | ||
634 | // now shuffle the additional records | |
635 | for(first=second;first!=rrs.end();++first) | |
e693ff5a | 636 | if(first->d_place==DNSResourceRecord::ADDITIONAL && first->d_type != QType::CNAME) // CNAME must come first |
e325f20c | 637 | break; |
638 | for(second=first; second!=rrs.end(); ++second) | |
e693ff5a | 639 | if(second->d_place!=DNSResourceRecord::ADDITIONAL) |
e325f20c | 640 | break; |
641 | ||
642 | if(second-first>1) | |
643 | random_shuffle(first,second); | |
644 | ||
645 | // we don't shuffle the rest | |
92476c8b PD |
646 | } |
647 | ||
2cccc377 | 648 | static uint16_t mapTypesToOrder(uint16_t type) |
27b85f24 | 649 | { |
650 | if(type == QType::CNAME) | |
651 | return 0; | |
2cccc377 | 652 | if(type == QType::RRSIG) |
653 | return 65535; | |
27b85f24 | 654 | else |
655 | return 1; | |
656 | } | |
657 | ||
92476c8b PD |
658 | // make sure rrs is sorted in d_place order to avoid surprises later |
659 | // then shuffle the parts that desire shuffling | |
e325f20c | 660 | void orderAndShuffle(vector<DNSRecord>& rrs) |
92476c8b | 661 | { |
e325f20c | 662 | std::stable_sort(rrs.begin(), rrs.end(), [](const DNSRecord&a, const DNSRecord& b) { |
2cccc377 | 663 | return std::make_tuple(a.d_place, mapTypesToOrder(a.d_type)) < std::make_tuple(b.d_place, mapTypesToOrder(b.d_type)); |
e325f20c | 664 | }); |
92476c8b PD |
665 | shuffle(rrs); |
666 | } | |
88358c9b BH |
667 | |
668 | void normalizeTV(struct timeval& tv) | |
669 | { | |
670 | if(tv.tv_usec > 1000000) { | |
671 | ++tv.tv_sec; | |
672 | tv.tv_usec-=1000000; | |
673 | } | |
674 | else if(tv.tv_usec < 0) { | |
675 | --tv.tv_sec; | |
676 | tv.tv_usec+=1000000; | |
677 | } | |
678 | } | |
679 | ||
680 | const struct timeval operator+(const struct timeval& lhs, const struct timeval& rhs) | |
681 | { | |
682 | struct timeval ret; | |
683 | ret.tv_sec=lhs.tv_sec + rhs.tv_sec; | |
684 | ret.tv_usec=lhs.tv_usec + rhs.tv_usec; | |
685 | normalizeTV(ret); | |
686 | return ret; | |
687 | } | |
688 | ||
689 | const struct timeval operator-(const struct timeval& lhs, const struct timeval& rhs) | |
690 | { | |
691 | struct timeval ret; | |
692 | ret.tv_sec=lhs.tv_sec - rhs.tv_sec; | |
693 | ret.tv_usec=lhs.tv_usec - rhs.tv_usec; | |
694 | normalizeTV(ret); | |
695 | return ret; | |
696 | } | |
50c79a76 BH |
697 | |
698 | pair<string, string> splitField(const string& inp, char sepa) | |
699 | { | |
700 | pair<string, string> ret; | |
701 | string::size_type cpos=inp.find(sepa); | |
702 | if(cpos==string::npos) | |
703 | ret.first=inp; | |
704 | else { | |
705 | ret.first=inp.substr(0, cpos); | |
706 | ret.second=inp.substr(cpos+1); | |
707 | } | |
708 | return ret; | |
709 | } | |
6e2514e4 | 710 | |
f8499e52 | 711 | int logFacilityToLOG(unsigned int facility) |
6e2514e4 | 712 | { |
6e2514e4 BH |
713 | switch(facility) { |
714 | case 0: | |
715 | return LOG_LOCAL0; | |
716 | case 1: | |
717 | return(LOG_LOCAL1); | |
718 | case 2: | |
719 | return(LOG_LOCAL2); | |
720 | case 3: | |
721 | return(LOG_LOCAL3); | |
722 | case 4: | |
723 | return(LOG_LOCAL4); | |
724 | case 5: | |
725 | return(LOG_LOCAL5); | |
726 | case 6: | |
727 | return(LOG_LOCAL6); | |
728 | case 7: | |
729 | return(LOG_LOCAL7); | |
730 | default: | |
f8499e52 | 731 | return -1; |
6e2514e4 BH |
732 | } |
733 | } | |
da042e6e BH |
734 | |
735 | string stripDot(const string& dom) | |
736 | { | |
737 | if(dom.empty()) | |
738 | return dom; | |
739 | ||
740 | if(dom[dom.size()-1]!='.') | |
741 | return dom; | |
742 | ||
743 | return dom.substr(0,dom.size()-1); | |
744 | } | |
4dadd22f BH |
745 | |
746 | ||
f71bc087 BH |
747 | |
748 | int makeIPv6sockaddr(const std::string& addr, struct sockaddr_in6* ret) | |
749 | { | |
85db02c5 BH |
750 | if(addr.empty()) |
751 | return -1; | |
752 | string ourAddr(addr); | |
6cbfa73b RG |
753 | bool portSet = false; |
754 | unsigned int port; | |
85db02c5 BH |
755 | if(addr[0]=='[') { // [::]:53 style address |
756 | string::size_type pos = addr.find(']'); | |
0047d734 | 757 | if(pos == string::npos) |
85db02c5 BH |
758 | return -1; |
759 | ourAddr.assign(addr.c_str() + 1, pos-1); | |
ed2ff96e | 760 | if (pos + 1 != addr.size()) { // complete after ], no port specified |
0047d734 CH |
761 | if (pos + 2 > addr.size() || addr[pos+1]!=':') |
762 | return -1; | |
763 | try { | |
764 | port = pdns_stou(addr.substr(pos+2)); | |
765 | portSet = true; | |
766 | } | |
d38e2ba9 | 767 | catch(const std::out_of_range&) { |
0047d734 CH |
768 | return -1; |
769 | } | |
5b4ed369 | 770 | } |
85db02c5 | 771 | } |
39d2d9b2 | 772 | ret->sin6_scope_id=0; |
773 | ret->sin6_family=AF_INET6; | |
774 | ||
0c9de4fc | 775 | if(inet_pton(AF_INET6, ourAddr.c_str(), (void*)&ret->sin6_addr) != 1) { |
776 | struct addrinfo* res; | |
777 | struct addrinfo hints; | |
778 | memset(&hints, 0, sizeof(hints)); | |
3ddb9247 | 779 | |
0c9de4fc | 780 | hints.ai_family = AF_INET6; |
781 | hints.ai_flags = AI_NUMERICHOST; | |
3ddb9247 | 782 | |
0c9de4fc | 783 | int error; |
1746e9bb | 784 | // getaddrinfo has anomalous return codes, anything nonzero is an error, positive or negative |
785 | if((error=getaddrinfo(ourAddr.c_str(), 0, &hints, &res))) { | |
0c9de4fc | 786 | return -1; |
787 | } | |
3ddb9247 | 788 | |
0c9de4fc | 789 | memcpy(ret, res->ai_addr, res->ai_addrlen); |
790 | freeaddrinfo(res); | |
f71bc087 | 791 | } |
0c9de4fc | 792 | |
6cbfa73b RG |
793 | if(portSet) { |
794 | if(port > 65535) | |
795 | return -1; | |
5b4ed369 | 796 | |
85db02c5 | 797 | ret->sin6_port = htons(port); |
6cbfa73b | 798 | } |
0c9de4fc | 799 | |
f71bc087 BH |
800 | return 0; |
801 | } | |
834942f1 | 802 | |
76cb4593 | 803 | int makeIPv4sockaddr(const std::string& str, struct sockaddr_in* ret) |
85db02c5 BH |
804 | { |
805 | if(str.empty()) { | |
806 | return -1; | |
807 | } | |
808 | struct in_addr inp; | |
3ddb9247 | 809 | |
85db02c5 BH |
810 | string::size_type pos = str.find(':'); |
811 | if(pos == string::npos) { // no port specified, not touching the port | |
3897b9e1 | 812 | if(inet_aton(str.c_str(), &inp)) { |
85db02c5 BH |
813 | ret->sin_addr.s_addr=inp.s_addr; |
814 | return 0; | |
815 | } | |
816 | return -1; | |
817 | } | |
818 | if(!*(str.c_str() + pos + 1)) // trailing : | |
3ddb9247 PD |
819 | return -1; |
820 | ||
85db02c5 BH |
821 | char *eptr = (char*)str.c_str() + str.size(); |
822 | int port = strtol(str.c_str() + pos + 1, &eptr, 10); | |
5b4ed369 PL |
823 | if (port < 0 || port > 65535) |
824 | return -1; | |
825 | ||
85db02c5 BH |
826 | if(*eptr) |
827 | return -1; | |
3ddb9247 | 828 | |
85db02c5 | 829 | ret->sin_port = htons(port); |
3897b9e1 | 830 | if(inet_aton(str.substr(0, pos).c_str(), &inp)) { |
85db02c5 BH |
831 | ret->sin_addr.s_addr=inp.s_addr; |
832 | return 0; | |
833 | } | |
834 | return -1; | |
835 | } | |
836 | ||
76cb4593 CH |
837 | int makeUNsockaddr(const std::string& path, struct sockaddr_un* ret) |
838 | { | |
839 | if (path.empty()) | |
840 | return -1; | |
841 | ||
842 | memset(ret, 0, sizeof(struct sockaddr_un)); | |
843 | ret->sun_family = AF_UNIX; | |
844 | if (path.length() >= sizeof(ret->sun_path)) | |
845 | return -1; | |
846 | ||
847 | path.copy(ret->sun_path, sizeof(ret->sun_path), 0); | |
848 | return 0; | |
849 | } | |
85db02c5 | 850 | |
834942f1 BH |
851 | //! read a line of text from a FILE* to a std::string, returns false on 'no data' |
852 | bool stringfgets(FILE* fp, std::string& line) | |
853 | { | |
854 | char buffer[1024]; | |
855 | line.clear(); | |
3ddb9247 | 856 | |
834942f1 BH |
857 | do { |
858 | if(!fgets(buffer, sizeof(buffer), fp)) | |
859 | return !line.empty(); | |
3ddb9247 PD |
860 | |
861 | line.append(buffer); | |
834942f1 BH |
862 | } while(!strchr(buffer, '\n')); |
863 | return true; | |
864 | } | |
e611a06c | 865 | |
4e9a20e6 | 866 | bool readFileIfThere(const char* fname, std::string* line) |
867 | { | |
868 | line->clear(); | |
869 | FILE* fp = fopen(fname, "r"); | |
870 | if(!fp) | |
871 | return false; | |
872 | stringfgets(fp, *line); | |
873 | fclose(fp); | |
874 | return true; | |
875 | } | |
876 | ||
3ee84c3f BH |
877 | Regex::Regex(const string &expr) |
878 | { | |
879 | if(regcomp(&d_preg, expr.c_str(), REG_ICASE|REG_NOSUB|REG_EXTENDED)) | |
3f81d239 | 880 | throw PDNSException("Regular expression did not compile"); |
3ee84c3f | 881 | } |
65d8e171 | 882 | |
25ba7344 PD |
883 | // if you end up here because valgrind told you were are doing something wrong |
884 | // with msgh->msg_controllen, please refer to https://github.com/PowerDNS/pdns/pull/3962 | |
885 | // first. | |
fbe2a2e0 | 886 | void addCMsgSrcAddr(struct msghdr* msgh, void* cmsgbuf, const ComboAddress* source, int itfIndex) |
65d8e171 | 887 | { |
ecc8571f | 888 | struct cmsghdr *cmsg = NULL; |
65d8e171 KN |
889 | |
890 | if(source->sin4.sin_family == AF_INET6) { | |
891 | struct in6_pktinfo *pkt; | |
892 | ||
893 | msgh->msg_control = cmsgbuf; | |
894 | msgh->msg_controllen = CMSG_SPACE(sizeof(*pkt)); | |
895 | ||
896 | cmsg = CMSG_FIRSTHDR(msgh); | |
897 | cmsg->cmsg_level = IPPROTO_IPV6; | |
898 | cmsg->cmsg_type = IPV6_PKTINFO; | |
899 | cmsg->cmsg_len = CMSG_LEN(sizeof(*pkt)); | |
900 | ||
901 | pkt = (struct in6_pktinfo *) CMSG_DATA(cmsg); | |
902 | memset(pkt, 0, sizeof(*pkt)); | |
903 | pkt->ipi6_addr = source->sin6.sin6_addr; | |
fbe2a2e0 | 904 | pkt->ipi6_ifindex = itfIndex; |
65d8e171 KN |
905 | } |
906 | else { | |
4d39d7f3 | 907 | #if defined(IP_PKTINFO) |
65d8e171 KN |
908 | struct in_pktinfo *pkt; |
909 | ||
910 | msgh->msg_control = cmsgbuf; | |
911 | msgh->msg_controllen = CMSG_SPACE(sizeof(*pkt)); | |
912 | ||
913 | cmsg = CMSG_FIRSTHDR(msgh); | |
914 | cmsg->cmsg_level = IPPROTO_IP; | |
915 | cmsg->cmsg_type = IP_PKTINFO; | |
916 | cmsg->cmsg_len = CMSG_LEN(sizeof(*pkt)); | |
917 | ||
918 | pkt = (struct in_pktinfo *) CMSG_DATA(cmsg); | |
919 | memset(pkt, 0, sizeof(*pkt)); | |
920 | pkt->ipi_spec_dst = source->sin4.sin_addr; | |
fbe2a2e0 | 921 | pkt->ipi_ifindex = itfIndex; |
4d39d7f3 | 922 | #elif defined(IP_SENDSRCADDR) |
65d8e171 KN |
923 | struct in_addr *in; |
924 | ||
925 | msgh->msg_control = cmsgbuf; | |
926 | msgh->msg_controllen = CMSG_SPACE(sizeof(*in)); | |
927 | ||
928 | cmsg = CMSG_FIRSTHDR(msgh); | |
929 | cmsg->cmsg_level = IPPROTO_IP; | |
930 | cmsg->cmsg_type = IP_SENDSRCADDR; | |
931 | cmsg->cmsg_len = CMSG_LEN(sizeof(*in)); | |
932 | ||
933 | in = (struct in_addr *) CMSG_DATA(cmsg); | |
934 | *in = source->sin4.sin_addr; | |
ecc8571f | 935 | #endif |
65d8e171 KN |
936 | } |
937 | } | |
3a8a4d68 | 938 | |
939 | unsigned int getFilenumLimit(bool hardOrSoft) | |
940 | { | |
941 | struct rlimit rlim; | |
942 | if(getrlimit(RLIMIT_NOFILE, &rlim) < 0) | |
943 | unixDie("Requesting number of available file descriptors"); | |
944 | return hardOrSoft ? rlim.rlim_max : rlim.rlim_cur; | |
945 | } | |
946 | ||
947 | void setFilenumLimit(unsigned int lim) | |
948 | { | |
949 | struct rlimit rlim; | |
950 | ||
951 | if(getrlimit(RLIMIT_NOFILE, &rlim) < 0) | |
952 | unixDie("Requesting number of available file descriptors"); | |
953 | rlim.rlim_cur=lim; | |
954 | if(setrlimit(RLIMIT_NOFILE, &rlim) < 0) | |
955 | unixDie("Setting number of available file descriptors"); | |
956 | } | |
06ea9015 | 957 | |
958 | #define burtlemix(a,b,c) \ | |
959 | { \ | |
960 | a -= b; a -= c; a ^= (c>>13); \ | |
961 | b -= c; b -= a; b ^= (a<<8); \ | |
962 | c -= a; c -= b; c ^= (b>>13); \ | |
963 | a -= b; a -= c; a ^= (c>>12); \ | |
964 | b -= c; b -= a; b ^= (a<<16); \ | |
965 | c -= a; c -= b; c ^= (b>>5); \ | |
966 | a -= b; a -= c; a ^= (c>>3); \ | |
967 | b -= c; b -= a; b ^= (a<<10); \ | |
968 | c -= a; c -= b; c ^= (b>>15); \ | |
969 | } | |
970 | ||
971 | uint32_t burtle(const unsigned char* k, uint32_t length, uint32_t initval) | |
972 | { | |
973 | uint32_t a,b,c,len; | |
974 | ||
975 | /* Set up the internal state */ | |
976 | len = length; | |
977 | a = b = 0x9e3779b9; /* the golden ratio; an arbitrary value */ | |
978 | c = initval; /* the previous hash value */ | |
979 | ||
980 | /*---------------------------------------- handle most of the key */ | |
981 | while (len >= 12) { | |
982 | a += (k[0] +((uint32_t)k[1]<<8) +((uint32_t)k[2]<<16) +((uint32_t)k[3]<<24)); | |
983 | b += (k[4] +((uint32_t)k[5]<<8) +((uint32_t)k[6]<<16) +((uint32_t)k[7]<<24)); | |
984 | c += (k[8] +((uint32_t)k[9]<<8) +((uint32_t)k[10]<<16)+((uint32_t)k[11]<<24)); | |
985 | burtlemix(a,b,c); | |
986 | k += 12; len -= 12; | |
987 | } | |
988 | ||
989 | /*------------------------------------- handle the last 11 bytes */ | |
990 | c += length; | |
991 | switch(len) { /* all the case statements fall through */ | |
992 | case 11: c+=((uint32_t)k[10]<<24); | |
993 | case 10: c+=((uint32_t)k[9]<<16); | |
994 | case 9 : c+=((uint32_t)k[8]<<8); | |
995 | /* the first byte of c is reserved for the length */ | |
996 | case 8 : b+=((uint32_t)k[7]<<24); | |
997 | case 7 : b+=((uint32_t)k[6]<<16); | |
998 | case 6 : b+=((uint32_t)k[5]<<8); | |
999 | case 5 : b+=k[4]; | |
1000 | case 4 : a+=((uint32_t)k[3]<<24); | |
1001 | case 3 : a+=((uint32_t)k[2]<<16); | |
1002 | case 2 : a+=((uint32_t)k[1]<<8); | |
1003 | case 1 : a+=k[0]; | |
1004 | /* case 0: nothing left to add */ | |
1005 | } | |
1006 | burtlemix(a,b,c); | |
1007 | /*-------------------------------------------- report the result */ | |
1008 | return c; | |
1009 | } | |
9ae194e2 | 1010 | |
6200227b | 1011 | uint32_t burtleCI(const unsigned char* k, uint32_t length, uint32_t initval) |
1012 | { | |
1013 | uint32_t a,b,c,len; | |
1014 | ||
1015 | /* Set up the internal state */ | |
1016 | len = length; | |
1017 | a = b = 0x9e3779b9; /* the golden ratio; an arbitrary value */ | |
1018 | c = initval; /* the previous hash value */ | |
1019 | ||
1020 | /*---------------------------------------- handle most of the key */ | |
1021 | while (len >= 12) { | |
af891b3d | 1022 | a += (dns_tolower(k[0]) +((uint32_t)dns_tolower(k[1])<<8) +((uint32_t)dns_tolower(k[2])<<16) +((uint32_t)dns_tolower(k[3])<<24)); |
1023 | b += (dns_tolower(k[4]) +((uint32_t)dns_tolower(k[5])<<8) +((uint32_t)dns_tolower(k[6])<<16) +((uint32_t)dns_tolower(k[7])<<24)); | |
1024 | c += (dns_tolower(k[8]) +((uint32_t)dns_tolower(k[9])<<8) +((uint32_t)dns_tolower(k[10])<<16)+((uint32_t)dns_tolower(k[11])<<24)); | |
6200227b | 1025 | burtlemix(a,b,c); |
1026 | k += 12; len -= 12; | |
1027 | } | |
1028 | ||
1029 | /*------------------------------------- handle the last 11 bytes */ | |
1030 | c += length; | |
1031 | switch(len) { /* all the case statements fall through */ | |
af891b3d | 1032 | case 11: c+=((uint32_t)dns_tolower(k[10])<<24); |
1033 | case 10: c+=((uint32_t)dns_tolower(k[9])<<16); | |
1034 | case 9 : c+=((uint32_t)dns_tolower(k[8])<<8); | |
6200227b | 1035 | /* the first byte of c is reserved for the length */ |
af891b3d | 1036 | case 8 : b+=((uint32_t)dns_tolower(k[7])<<24); |
1037 | case 7 : b+=((uint32_t)dns_tolower(k[6])<<16); | |
1038 | case 6 : b+=((uint32_t)dns_tolower(k[5])<<8); | |
1039 | case 5 : b+=dns_tolower(k[4]); | |
1040 | case 4 : a+=((uint32_t)dns_tolower(k[3])<<24); | |
1041 | case 3 : a+=((uint32_t)dns_tolower(k[2])<<16); | |
1042 | case 2 : a+=((uint32_t)dns_tolower(k[1])<<8); | |
1043 | case 1 : a+=dns_tolower(k[0]); | |
6200227b | 1044 | /* case 0: nothing left to add */ |
1045 | } | |
1046 | burtlemix(a,b,c); | |
1047 | /*-------------------------------------------- report the result */ | |
1048 | return c; | |
1049 | } | |
1050 | ||
1051 | ||
915b0c39 | 1052 | bool setSocketTimestamps(int fd) |
9ae194e2 | 1053 | { |
eb4c1792 | 1054 | #ifdef SO_TIMESTAMP |
9ae194e2 | 1055 | int on=1; |
915b0c39 | 1056 | return setsockopt(fd, SOL_SOCKET, SO_TIMESTAMP, (char*)&on, sizeof(on)) == 0; |
99be0a43 | 1057 | #else |
915b0c39 | 1058 | return true; // we pretend this happened. |
99be0a43 | 1059 | #endif |
9ae194e2 | 1060 | } |
58044407 | 1061 | |
883a30a7 | 1062 | bool setTCPNoDelay(int sock) |
149d0144 | 1063 | { |
1064 | int flag = 1; | |
883a30a7 RG |
1065 | return setsockopt(sock, /* socket affected */ |
1066 | IPPROTO_TCP, /* set option at TCP level */ | |
1067 | TCP_NODELAY, /* name of option */ | |
1068 | (char *) &flag, /* the cast is historical cruft */ | |
1069 | sizeof(flag)) == 0; /* length of option value */ | |
149d0144 | 1070 | } |
1071 | ||
1072 | ||
3897b9e1 | 1073 | bool setNonBlocking(int sock) |
1074 | { | |
3ddb9247 | 1075 | int flags=fcntl(sock,F_GETFL,0); |
3897b9e1 | 1076 | if(flags<0 || fcntl(sock, F_SETFL,flags|O_NONBLOCK) <0) |
1077 | return false; | |
1078 | return true; | |
1079 | } | |
1080 | ||
1081 | bool setBlocking(int sock) | |
1082 | { | |
3ddb9247 | 1083 | int flags=fcntl(sock,F_GETFL,0); |
3897b9e1 | 1084 | if(flags<0 || fcntl(sock, F_SETFL,flags&(~O_NONBLOCK)) <0) |
1085 | return false; | |
1086 | return true; | |
1087 | } | |
1088 | ||
bf676f2f PL |
1089 | bool setReuseAddr(int sock) |
1090 | { | |
1091 | int tmp = 1; | |
1092 | if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char*)&tmp, static_cast<unsigned>(sizeof tmp))<0) | |
1093 | throw PDNSException(string("Setsockopt failed: ")+strerror(errno)); | |
1094 | return true; | |
1095 | } | |
1096 | ||
18861f97 RG |
1097 | bool isNonBlocking(int sock) |
1098 | { | |
1099 | int flags=fcntl(sock,F_GETFL,0); | |
1100 | return flags & O_NONBLOCK; | |
1101 | } | |
1102 | ||
3897b9e1 | 1103 | // Closes a socket. |
1104 | int closesocket( int socket ) | |
1105 | { | |
1106 | int ret=::close(socket); | |
1107 | if(ret < 0 && errno == ECONNRESET) // see ticket 192, odd BSD behaviour | |
1108 | return 0; | |
3ddb9247 | 1109 | if(ret < 0) |
3897b9e1 | 1110 | throw PDNSException("Error closing socket: "+stringerror()); |
1111 | return ret; | |
1112 | } | |
1113 | ||
1114 | bool setCloseOnExec(int sock) | |
1115 | { | |
3ddb9247 | 1116 | int flags=fcntl(sock,F_GETFD,0); |
3897b9e1 | 1117 | if(flags<0 || fcntl(sock, F_SETFD,flags|FD_CLOEXEC) <0) |
1118 | return false; | |
1119 | return true; | |
1120 | } | |
1121 | ||
6907f014 | 1122 | string getMACAddress(const ComboAddress& ca) |
1123 | { | |
1124 | string ret; | |
1125 | #ifdef __linux__ | |
1126 | ifstream ifs("/proc/net/arp"); | |
1127 | if(!ifs) | |
1128 | return ret; | |
1129 | string line; | |
1130 | string match=ca.toString()+' '; | |
1131 | while(getline(ifs, line)) { | |
1132 | if(boost::starts_with(line, match)) { | |
1133 | vector<string> parts; | |
1134 | stringtok(parts, line, " \n\t\r"); | |
1135 | if(parts.size() < 4) | |
1136 | return ret; | |
1137 | unsigned int tmp[6]; | |
1138 | sscanf(parts[3].c_str(), "%02x:%02x:%02x:%02x:%02x:%02x", tmp, tmp+1, tmp+2, tmp+3, tmp+4, tmp+5); | |
1139 | for(int i = 0 ; i< 6 ; ++i) | |
1140 | ret.append(1, (char)tmp[i]); | |
1141 | return ret; | |
1142 | } | |
1143 | } | |
1144 | #endif | |
1145 | return ret; | |
1146 | } | |
1147 | ||
8290ad9f | 1148 | uint64_t udpErrorStats(const std::string& str) |
1149 | { | |
1150 | #ifdef __linux__ | |
1151 | ifstream ifs("/proc/net/snmp"); | |
1152 | if(!ifs) | |
1153 | return 0; | |
1154 | string line; | |
1155 | vector<string> parts; | |
1156 | while(getline(ifs,line)) { | |
1157 | if(boost::starts_with(line, "Udp: ") && isdigit(line[5])) { | |
1158 | stringtok(parts, line, " \n\t\r"); | |
1159 | if(parts.size() < 7) | |
1160 | break; | |
1161 | if(str=="udp-rcvbuf-errors") | |
335da0ba | 1162 | return std::stoull(parts[5]); |
8290ad9f | 1163 | else if(str=="udp-sndbuf-errors") |
335da0ba | 1164 | return std::stoull(parts[6]); |
8290ad9f | 1165 | else if(str=="udp-noport-errors") |
335da0ba | 1166 | return std::stoull(parts[2]); |
8290ad9f | 1167 | else if(str=="udp-in-errors") |
335da0ba | 1168 | return std::stoull(parts[3]); |
8290ad9f | 1169 | else |
1170 | return 0; | |
1171 | } | |
1172 | } | |
1173 | #endif | |
1174 | return 0; | |
1175 | } | |
da15912b | 1176 | |
21a3792f | 1177 | bool getTSIGHashEnum(const DNSName& algoName, TSIGHashEnum& algoEnum) |
da15912b | 1178 | { |
2330c421 | 1179 | if (algoName == DNSName("hmac-md5.sig-alg.reg.int") || algoName == DNSName("hmac-md5")) |
da15912b | 1180 | algoEnum = TSIG_MD5; |
2330c421 | 1181 | else if (algoName == DNSName("hmac-sha1")) |
da15912b | 1182 | algoEnum = TSIG_SHA1; |
2330c421 | 1183 | else if (algoName == DNSName("hmac-sha224")) |
da15912b | 1184 | algoEnum = TSIG_SHA224; |
2330c421 | 1185 | else if (algoName == DNSName("hmac-sha256")) |
da15912b | 1186 | algoEnum = TSIG_SHA256; |
2330c421 | 1187 | else if (algoName == DNSName("hmac-sha384")) |
da15912b | 1188 | algoEnum = TSIG_SHA384; |
2330c421 | 1189 | else if (algoName == DNSName("hmac-sha512")) |
da15912b | 1190 | algoEnum = TSIG_SHA512; |
2330c421 | 1191 | else if (algoName == DNSName("gss-tsig")) |
bcb5b94e | 1192 | algoEnum = TSIG_GSS; |
da15912b AT |
1193 | else { |
1194 | return false; | |
1195 | } | |
1196 | return true; | |
1197 | } | |
bfd4efae | 1198 | |
21a3792f | 1199 | DNSName getTSIGAlgoName(TSIGHashEnum& algoEnum) |
bfd4efae AT |
1200 | { |
1201 | switch(algoEnum) { | |
8171ab83 | 1202 | case TSIG_MD5: return DNSName("hmac-md5.sig-alg.reg.int."); |
1203 | case TSIG_SHA1: return DNSName("hmac-sha1."); | |
1204 | case TSIG_SHA224: return DNSName("hmac-sha224."); | |
1205 | case TSIG_SHA256: return DNSName("hmac-sha256."); | |
1206 | case TSIG_SHA384: return DNSName("hmac-sha384."); | |
1207 | case TSIG_SHA512: return DNSName("hmac-sha512."); | |
1208 | case TSIG_GSS: return DNSName("gss-tsig."); | |
bfd4efae AT |
1209 | } |
1210 | throw PDNSException("getTSIGAlgoName does not understand given algorithm, please fix!"); | |
1211 | } | |
a1a787dc | 1212 | |
a9b6db56 | 1213 | uint64_t getOpenFileDescriptors(const std::string&) |
1214 | { | |
1215 | #ifdef __linux__ | |
1216 | DIR* dirhdl=opendir(("/proc/"+std::to_string(getpid())+"/fd/").c_str()); | |
1217 | if(!dirhdl) | |
1218 | return 0; | |
1219 | ||
1220 | struct dirent *entry; | |
1221 | int ret=0; | |
1222 | while((entry = readdir(dirhdl))) { | |
335da0ba AT |
1223 | uint32_t num; |
1224 | try { | |
1225 | num = pdns_stou(entry->d_name); | |
1226 | } catch (...) { | |
1227 | continue; // was not a number. | |
1228 | } | |
a9b6db56 | 1229 | if(std::to_string(num) == entry->d_name) |
1230 | ret++; | |
1231 | } | |
1232 | closedir(dirhdl); | |
1233 | return ret; | |
1234 | ||
1235 | #else | |
1236 | return 0; | |
1237 | #endif | |
1238 | } | |
1239 | ||
a1a787dc | 1240 | uint64_t getRealMemoryUsage(const std::string&) |
1241 | { | |
1242 | #ifdef __linux__ | |
1243 | ifstream ifs("/proc/"+std::to_string(getpid())+"/smaps"); | |
1244 | if(!ifs) | |
1245 | return 0; | |
1246 | string line; | |
1247 | uint64_t bytes=0; | |
1248 | string header("Private_Dirty:"); | |
1249 | while(getline(ifs, line)) { | |
1250 | if(boost::starts_with(line, header)) { | |
335da0ba | 1251 | bytes += std::stoull(line.substr(header.length() + 1))*1024; |
a1a787dc | 1252 | } |
1253 | } | |
1254 | return bytes; | |
1255 | #else | |
1256 | return 0; | |
1257 | #endif | |
1258 | } | |
4f99f3d3 RG |
1259 | |
1260 | uint64_t getCPUTimeUser(const std::string&) | |
1261 | { | |
1262 | struct rusage ru; | |
1263 | getrusage(RUSAGE_SELF, &ru); | |
1264 | return (ru.ru_utime.tv_sec*1000ULL + ru.ru_utime.tv_usec/1000); | |
1265 | } | |
1266 | ||
1267 | uint64_t getCPUTimeSystem(const std::string&) | |
1268 | { | |
1269 | struct rusage ru; | |
1270 | getrusage(RUSAGE_SELF, &ru); | |
1271 | return (ru.ru_stime.tv_sec*1000ULL + ru.ru_stime.tv_usec/1000); | |
1272 | } | |
3fcaeeac | 1273 | |
1274 | double DiffTime(const struct timespec& first, const struct timespec& second) | |
1275 | { | |
1276 | int seconds=second.tv_sec - first.tv_sec; | |
1277 | int nseconds=second.tv_nsec - first.tv_nsec; | |
1278 | ||
1279 | if(nseconds < 0) { | |
1280 | seconds-=1; | |
1281 | nseconds+=1000000000; | |
1282 | } | |
1283 | return seconds + nseconds/1000000000.0; | |
1284 | } | |
1285 | ||
1286 | double DiffTime(const struct timeval& first, const struct timeval& second) | |
1287 | { | |
1288 | int seconds=second.tv_sec - first.tv_sec; | |
1289 | int useconds=second.tv_usec - first.tv_usec; | |
1290 | ||
1291 | if(useconds < 0) { | |
1292 | seconds-=1; | |
1293 | useconds+=1000000; | |
1294 | } | |
1295 | return seconds + useconds/1000000.0; | |
1296 | } | |
ffb07158 | 1297 | |
ffb07158 | 1298 | uid_t strToUID(const string &str) |
1299 | { | |
1300 | uid_t result = 0; | |
1301 | const char * cstr = str.c_str(); | |
1302 | struct passwd * pwd = getpwnam(cstr); | |
1303 | ||
1304 | if (pwd == NULL) { | |
e805cba5 | 1305 | long long val; |
ffb07158 | 1306 | |
e805cba5 RG |
1307 | try { |
1308 | val = stoll(str); | |
ffb07158 | 1309 | } |
e805cba5 RG |
1310 | catch(std::exception& e) { |
1311 | throw runtime_error((boost::format("Error: Unable to parse user ID %s") % cstr).str() ); | |
1312 | } | |
1313 | ||
1314 | if (val < std::numeric_limits<uid_t>::min() || val > std::numeric_limits<uid_t>::max()) { | |
1315 | throw runtime_error((boost::format("Error: Unable to parse user ID %s") % cstr).str() ); | |
ffb07158 | 1316 | } |
e805cba5 RG |
1317 | |
1318 | result = static_cast<uid_t>(val); | |
ffb07158 | 1319 | } |
1320 | else { | |
1321 | result = pwd->pw_uid; | |
1322 | } | |
1323 | ||
1324 | return result; | |
1325 | } | |
1326 | ||
1327 | gid_t strToGID(const string &str) | |
1328 | { | |
1329 | gid_t result = 0; | |
1330 | const char * cstr = str.c_str(); | |
1331 | struct group * grp = getgrnam(cstr); | |
1332 | ||
1333 | if (grp == NULL) { | |
e805cba5 | 1334 | long long val; |
ffb07158 | 1335 | |
e805cba5 RG |
1336 | try { |
1337 | val = stoll(str); | |
ffb07158 | 1338 | } |
e805cba5 RG |
1339 | catch(std::exception& e) { |
1340 | throw runtime_error((boost::format("Error: Unable to parse group ID %s") % cstr).str() ); | |
1341 | } | |
1342 | ||
1343 | if (val < std::numeric_limits<gid_t>::min() || val > std::numeric_limits<gid_t>::max()) { | |
1344 | throw runtime_error((boost::format("Error: Unable to parse group ID %s") % cstr).str() ); | |
ffb07158 | 1345 | } |
e805cba5 RG |
1346 | |
1347 | result = static_cast<gid_t>(val); | |
ffb07158 | 1348 | } |
1349 | else { | |
1350 | result = grp->gr_gid; | |
1351 | } | |
1352 | ||
1353 | return result; | |
1354 | } | |
1355 | ||
335da0ba | 1356 | unsigned int pdns_stou(const std::string& str, size_t * idx, int base) |
a5c4e4a6 | 1357 | { |
00f45062 | 1358 | if (str.empty()) return 0; // compatibility |
2f975181 PD |
1359 | unsigned long result; |
1360 | try { | |
1361 | result = std::stoul(str, idx, base); | |
1362 | } | |
1363 | catch(std::invalid_argument& e) { | |
1364 | throw std::invalid_argument(string(e.what()) + "; (invalid argument during std::stoul); data was \""+str+"\""); | |
1365 | } | |
cccfa59b PD |
1366 | catch(std::out_of_range& e) { |
1367 | throw std::out_of_range(string(e.what()) + "; (out of range during std::stoul); data was \""+str+"\""); | |
1368 | } | |
a5c4e4a6 | 1369 | if (result > std::numeric_limits<unsigned int>::max()) { |
cccfa59b | 1370 | throw std::out_of_range("stoul returned result out of unsigned int range; data was \""+str+"\""); |
a5c4e4a6 AT |
1371 | } |
1372 | return static_cast<unsigned int>(result); | |
1373 | } | |
1374 | ||
8fd25133 RG |
1375 | bool isSettingThreadCPUAffinitySupported() |
1376 | { | |
1377 | #ifdef HAVE_PTHREAD_SETAFFINITY_NP | |
1378 | return true; | |
1379 | #else | |
1380 | return false; | |
1381 | #endif | |
1382 | } | |
1383 | ||
1384 | int mapThreadToCPUList(pthread_t tid, const std::set<int>& cpus) | |
1385 | { | |
1386 | #ifdef HAVE_PTHREAD_SETAFFINITY_NP | |
4d39d7f3 TIH |
1387 | # ifdef __NetBSD__ |
1388 | cpuset_t *cpuset; | |
1389 | cpuset = cpuset_create(); | |
1390 | for (const auto cpuID : cpus) { | |
1391 | cpuset_set(cpuID, cpuset); | |
1392 | } | |
1393 | ||
1394 | return pthread_setaffinity_np(tid, | |
1395 | cpuset_size(cpuset), | |
1396 | cpuset); | |
1397 | # else | |
1398 | # ifdef __FreeBSD__ | |
1399 | # define cpu_set_t cpuset_t | |
1400 | # endif | |
8fd25133 RG |
1401 | cpu_set_t cpuset; |
1402 | CPU_ZERO(&cpuset); | |
1403 | for (const auto cpuID : cpus) { | |
1404 | CPU_SET(cpuID, &cpuset); | |
1405 | } | |
1406 | ||
1407 | return pthread_setaffinity_np(tid, | |
1408 | sizeof(cpuset), | |
1409 | &cpuset); | |
4d39d7f3 | 1410 | # endif |
99be0a43 | 1411 | #else |
8fd25133 | 1412 | return ENOSYS; |
99be0a43 | 1413 | #endif /* HAVE_PTHREAD_SETAFFINITY_NP */ |
8fd25133 | 1414 | } |
5d4e1ef8 RG |
1415 | |
1416 | std::vector<ComboAddress> getResolvers(const std::string& resolvConfPath) | |
1417 | { | |
1418 | std::vector<ComboAddress> results; | |
1419 | ||
1420 | ifstream ifs(resolvConfPath); | |
1421 | if (!ifs) { | |
1422 | return results; | |
1423 | } | |
1424 | ||
1425 | string line; | |
1426 | while(std::getline(ifs, line)) { | |
1427 | boost::trim_right_if(line, is_any_of(" \r\n\x1a")); | |
1428 | boost::trim_left(line); // leading spaces, let's be nice | |
1429 | ||
1430 | string::size_type tpos = line.find_first_of(";#"); | |
1431 | if (tpos != string::npos) { | |
1432 | line.resize(tpos); | |
1433 | } | |
1434 | ||
1435 | if (boost::starts_with(line, "nameserver ") || boost::starts_with(line, "nameserver\t")) { | |
1436 | vector<string> parts; | |
1437 | stringtok(parts, line, " \t,"); // be REALLY nice | |
1438 | for(vector<string>::const_iterator iter = parts.begin() + 1; iter != parts.end(); ++iter) { | |
1439 | try { | |
1440 | results.emplace_back(*iter, 53); | |
1441 | } | |
1442 | catch(...) | |
1443 | { | |
1444 | } | |
1445 | } | |
1446 | } | |
1447 | } | |
1448 | ||
1449 | return results; | |
1450 | } |