]>
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 | |
a683e8bd | 68 | size_t writen2(int fd, const void *buf, size_t count) |
040712e0 BH |
69 | { |
70 | const char *ptr = (char*)buf; | |
71 | const char *eptr = ptr + count; | |
3ddb9247 | 72 | |
a683e8bd | 73 | ssize_t res; |
040712e0 BH |
74 | while(ptr != eptr) { |
75 | res = ::write(fd, ptr, eptr - ptr); | |
76 | if(res < 0) { | |
77 | if (errno == EAGAIN) | |
4957a608 | 78 | throw std::runtime_error("used writen2 on non-blocking socket, got EAGAIN"); |
040712e0 | 79 | else |
4957a608 | 80 | unixDie("failed in writen2"); |
040712e0 BH |
81 | } |
82 | else if (res == 0) | |
83 | throw std::runtime_error("could not write all bytes, got eof in writen2"); | |
3ddb9247 | 84 | |
a683e8bd | 85 | ptr += (size_t) res; |
040712e0 | 86 | } |
3ddb9247 | 87 | |
040712e0 BH |
88 | return count; |
89 | } | |
90 | ||
a683e8bd | 91 | size_t readn2(int fd, void* buffer, size_t len) |
36fbf590 | 92 | { |
a683e8bd RG |
93 | size_t pos=0; |
94 | ssize_t res; | |
36fbf590 | 95 | for(;;) { |
96 | res = read(fd, (char*)buffer + pos, len - pos); | |
3ddb9247 | 97 | if(res == 0) |
3f6d07a4 | 98 | throw runtime_error("EOF while reading message"); |
36fbf590 | 99 | if(res < 0) { |
100 | if (errno == EAGAIN) | |
3f6d07a4 | 101 | throw std::runtime_error("used readn2 on non-blocking socket, got EAGAIN"); |
36fbf590 | 102 | else |
3f6d07a4 | 103 | unixDie("failed in readn2"); |
3ddb9247 PD |
104 | } |
105 | ||
a683e8bd | 106 | pos+=(size_t)res; |
36fbf590 | 107 | if(pos == len) |
108 | break; | |
109 | } | |
110 | return len; | |
111 | } | |
112 | ||
9396d955 | 113 | size_t readn2WithTimeout(int fd, void* buffer, size_t len, int idleTimeout, int totalTimeout) |
3f6d07a4 RG |
114 | { |
115 | size_t pos = 0; | |
9396d955 RG |
116 | time_t start = 0; |
117 | int remainingTime = totalTimeout; | |
118 | if (totalTimeout) { | |
119 | start = time(NULL); | |
120 | } | |
121 | ||
3f6d07a4 RG |
122 | do { |
123 | ssize_t got = read(fd, (char *)buffer + pos, len - pos); | |
124 | if (got > 0) { | |
125 | pos += (size_t) got; | |
126 | } | |
127 | else if (got == 0) { | |
128 | throw runtime_error("EOF while reading message"); | |
129 | } | |
130 | else { | |
131 | if (errno == EAGAIN) { | |
9396d955 | 132 | int res = waitForData(fd, (totalTimeout == 0 || idleTimeout <= remainingTime) ? idleTimeout : remainingTime); |
3f6d07a4 RG |
133 | if (res > 0) { |
134 | /* there is data available */ | |
135 | } | |
136 | else if (res == 0) { | |
137 | throw runtime_error("Timeout while waiting for data to read"); | |
138 | } else { | |
139 | throw runtime_error("Error while waiting for data to read"); | |
140 | } | |
141 | } | |
142 | else { | |
143 | unixDie("failed in readn2WithTimeout"); | |
144 | } | |
145 | } | |
9396d955 RG |
146 | |
147 | if (totalTimeout) { | |
148 | time_t now = time(NULL); | |
149 | int elapsed = now - start; | |
150 | if (elapsed >= remainingTime) { | |
151 | throw runtime_error("Timeout while reading data"); | |
152 | } | |
153 | start = now; | |
154 | remainingTime -= elapsed; | |
155 | } | |
3f6d07a4 RG |
156 | } |
157 | while (pos < len); | |
158 | ||
159 | return len; | |
160 | } | |
161 | ||
a683e8bd | 162 | size_t writen2WithTimeout(int fd, const void * buffer, size_t len, int timeout) |
3f6d07a4 RG |
163 | { |
164 | size_t pos = 0; | |
165 | do { | |
166 | ssize_t written = write(fd, (char *)buffer + pos, len - pos); | |
167 | ||
168 | if (written > 0) { | |
169 | pos += (size_t) written; | |
170 | } | |
171 | else if (written == 0) | |
172 | throw runtime_error("EOF while writing message"); | |
173 | else { | |
174 | if (errno == EAGAIN) { | |
175 | int res = waitForRWData(fd, false, timeout, 0); | |
176 | if (res > 0) { | |
177 | /* there is room available */ | |
178 | } | |
179 | else if (res == 0) { | |
180 | throw runtime_error("Timeout while waiting to write data"); | |
181 | } else { | |
182 | throw runtime_error("Error while waiting for room to write data"); | |
183 | } | |
184 | } | |
185 | else { | |
186 | unixDie("failed in write2WithTimeout"); | |
187 | } | |
188 | } | |
189 | } | |
190 | while (pos < len); | |
191 | ||
192 | return len; | |
193 | } | |
12c86877 | 194 | |
cc3afe25 BH |
195 | string nowTime() |
196 | { | |
74ab661c | 197 | time_t now = time(nullptr); |
f0dbdd62 OM |
198 | struct tm tm; |
199 | localtime_r(&now, &tm); | |
74ab661c CH |
200 | char buffer[30]; |
201 | // YYYY-mm-dd HH:MM:SS TZOFF | |
f0dbdd62 | 202 | strftime(buffer, sizeof(buffer), "%F %T %z", &tm); |
74ab661c | 203 | buffer[sizeof(buffer)-1] = '\0'; |
bfbf6814 | 204 | return string(buffer); |
cc3afe25 | 205 | } |
12c86877 | 206 | |
092f210a | 207 | uint16_t getShort(const unsigned char *p) |
0d8612f2 BH |
208 | { |
209 | return p[0] * 256 + p[1]; | |
210 | } | |
211 | ||
212 | ||
092f210a | 213 | uint16_t getShort(const char *p) |
0d8612f2 BH |
214 | { |
215 | return getShort((const unsigned char *)p); | |
216 | } | |
217 | ||
092f210a | 218 | uint32_t getLong(const unsigned char* p) |
b636533b BH |
219 | { |
220 | return (p[0]<<24) + (p[1]<<16) + (p[2]<<8) + p[3]; | |
221 | } | |
222 | ||
092f210a | 223 | uint32_t getLong(const char* p) |
b636533b BH |
224 | { |
225 | return getLong((unsigned char *)p); | |
226 | } | |
227 | ||
a683e8bd | 228 | static bool ciEqual(const string& a, const string& b) |
49bd5a20 BH |
229 | { |
230 | if(a.size()!=b.size()) | |
231 | return false; | |
232 | ||
233 | string::size_type pos=0, epos=a.size(); | |
234 | for(;pos < epos; ++pos) | |
235 | if(dns_tolower(a[pos])!=dns_tolower(b[pos])) | |
236 | return false; | |
237 | return true; | |
238 | } | |
239 | ||
728485ca | 240 | /** does domain end on suffix? Is smart about "wwwds9a.nl" "ds9a.nl" not matching */ |
a683e8bd | 241 | static bool endsOn(const string &domain, const string &suffix) |
728485ca | 242 | { |
49bd5a20 | 243 | if( suffix.empty() || ciEqual(domain, suffix) ) |
728485ca | 244 | return true; |
7738a23f | 245 | |
728485ca BH |
246 | if(domain.size()<=suffix.size()) |
247 | return false; | |
3ddb9247 | 248 | |
49bd5a20 | 249 | string::size_type dpos=domain.size()-suffix.size()-1, spos=0; |
7738a23f | 250 | |
49bd5a20 BH |
251 | if(domain[dpos++]!='.') |
252 | return false; | |
728485ca | 253 | |
49bd5a20 BH |
254 | for(; dpos < domain.size(); ++dpos, ++spos) |
255 | if(dns_tolower(domain[dpos]) != dns_tolower(suffix[spos])) | |
256 | return false; | |
257 | ||
258 | return true; | |
259 | } | |
f2c11a48 | 260 | |
a683e8bd RG |
261 | /** strips a domain suffix from a domain, returns true if it stripped */ |
262 | bool stripDomainSuffix(string *qname, const string &domain) | |
263 | { | |
264 | if(!endsOn(*qname, domain)) | |
265 | return false; | |
266 | ||
267 | if(toLower(*qname)==toLower(domain)) | |
268 | *qname="@"; | |
269 | else { | |
270 | if((*qname)[qname->size()-domain.size()-1]!='.') | |
271 | return false; | |
272 | ||
273 | qname->resize(qname->size()-domain.size()-1); | |
274 | } | |
275 | return true; | |
276 | } | |
277 | ||
32252594 | 278 | static void parseService4(const string &descr, ServiceTuple &st) |
12c86877 BH |
279 | { |
280 | vector<string>parts; | |
281 | stringtok(parts,descr,":"); | |
52936200 | 282 | if(parts.empty()) |
3f81d239 | 283 | throw PDNSException("Unable to parse '"+descr+"' as a service"); |
12c86877 BH |
284 | st.host=parts[0]; |
285 | if(parts.size()>1) | |
335da0ba | 286 | st.port=pdns_stou(parts[1]); |
12c86877 BH |
287 | } |
288 | ||
32252594 BH |
289 | static void parseService6(const string &descr, ServiceTuple &st) |
290 | { | |
291 | string::size_type pos=descr.find(']'); | |
292 | if(pos == string::npos) | |
3f81d239 | 293 | throw PDNSException("Unable to parse '"+descr+"' as an IPv6 service"); |
32252594 BH |
294 | |
295 | st.host=descr.substr(1, pos-1); | |
296 | if(pos + 2 < descr.length()) | |
335da0ba | 297 | st.port=pdns_stou(descr.substr(pos+2)); |
32252594 BH |
298 | } |
299 | ||
300 | ||
301 | void parseService(const string &descr, ServiceTuple &st) | |
302 | { | |
303 | if(descr.empty()) | |
3f81d239 | 304 | throw PDNSException("Unable to parse '"+descr+"' as a service"); |
32252594 BH |
305 | |
306 | vector<string> parts; | |
307 | stringtok(parts, descr, ":"); | |
308 | ||
309 | if(descr[0]=='[') { | |
310 | parseService6(descr, st); | |
311 | } | |
312 | else if(descr[0]==':' || parts.size() > 2 || descr.find("::") != string::npos) { | |
313 | st.host=descr; | |
314 | } | |
315 | else { | |
316 | parseService4(descr, st); | |
317 | } | |
318 | } | |
12c86877 | 319 | |
1fb3f0fc | 320 | // 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 | 321 | int waitForData(int fd, int seconds, int useconds) |
649a88df BH |
322 | { |
323 | return waitForRWData(fd, true, seconds, useconds); | |
324 | } | |
325 | ||
51959320 | 326 | int waitForRWData(int fd, bool waitForRead, int seconds, int useconds, bool* error, bool* disconnected) |
12c86877 | 327 | { |
1258abe0 BH |
328 | int ret; |
329 | ||
fab091b9 BH |
330 | struct pollfd pfd; |
331 | memset(&pfd, 0, sizeof(pfd)); | |
332 | pfd.fd = fd; | |
3ddb9247 | 333 | |
649a88df | 334 | if(waitForRead) |
fab091b9 | 335 | pfd.events=POLLIN; |
649a88df | 336 | else |
fab091b9 | 337 | pfd.events=POLLOUT; |
1258abe0 | 338 | |
6b3d4330 | 339 | ret = poll(&pfd, 1, seconds * 1000 + useconds/1000); |
e07c3801 | 340 | if (ret > 0) { |
51959320 RG |
341 | if (error && (pfd.revents & POLLERR)) { |
342 | *error = true; | |
343 | } | |
344 | if (disconnected && (pfd.revents & POLLHUP)) { | |
345 | *disconnected = true; | |
346 | } | |
347 | } | |
1258abe0 | 348 | |
12c86877 BH |
349 | return ret; |
350 | } | |
351 | ||
a71bee29 | 352 | // 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 | 353 | int waitForMultiData(const set<int>& fds, const int seconds, const int useconds, int* fdOut) { |
d529011f PL |
354 | set<int> realFDs; |
355 | for (const auto& fd : fds) { | |
356 | if (fd >= 0 && realFDs.count(fd) == 0) { | |
357 | realFDs.insert(fd); | |
358 | } | |
359 | } | |
360 | ||
dcc0e65d | 361 | std::vector<struct pollfd> pfds(realFDs.size()); |
c2a16005 | 362 | memset(pfds.data(), 0, realFDs.size()*sizeof(struct pollfd)); |
d529011f PL |
363 | int ctr = 0; |
364 | for (const auto& fd : realFDs) { | |
365 | pfds[ctr].fd = fd; | |
366 | pfds[ctr].events = POLLIN; | |
367 | ctr++; | |
368 | } | |
369 | ||
370 | int ret; | |
371 | if(seconds >= 0) | |
c2a16005 | 372 | ret = poll(pfds.data(), realFDs.size(), seconds * 1000 + useconds/1000); |
d529011f | 373 | else |
c2a16005 | 374 | ret = poll(pfds.data(), realFDs.size(), -1); |
d529011f PL |
375 | if(ret <= 0) |
376 | return ret; | |
377 | ||
378 | set<int> pollinFDs; | |
aca9c605 PL |
379 | for (const auto& pfd : pfds) { |
380 | if (pfd.revents & POLLIN) { | |
381 | pollinFDs.insert(pfd.fd); | |
d529011f | 382 | } |
d529011f PL |
383 | } |
384 | set<int>::const_iterator it(pollinFDs.begin()); | |
385 | advance(it, random() % pollinFDs.size()); | |
dc058f65 | 386 | *fdOut = *it; |
d529011f PL |
387 | return 1; |
388 | } | |
389 | ||
a71bee29 | 390 | // 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 |
391 | int waitFor2Data(int fd1, int fd2, int seconds, int useconds, int*fd) |
392 | { | |
393 | int ret; | |
394 | ||
395 | struct pollfd pfds[2]; | |
396 | memset(&pfds[0], 0, 2*sizeof(struct pollfd)); | |
397 | pfds[0].fd = fd1; | |
398 | pfds[1].fd = fd2; | |
3ddb9247 | 399 | |
f4ff5929 BH |
400 | pfds[0].events= pfds[1].events = POLLIN; |
401 | ||
402 | int nsocks = 1 + (fd2 >= 0); // fd2 can optionally be -1 | |
403 | ||
404 | if(seconds >= 0) | |
405 | ret = poll(pfds, nsocks, seconds * 1000 + useconds/1000); | |
406 | else | |
407 | ret = poll(pfds, nsocks, -1); | |
408 | if(!ret || ret < 0) | |
409 | return ret; | |
3ddb9247 | 410 | |
f4ff5929 BH |
411 | if((pfds[0].revents & POLLIN) && !(pfds[1].revents & POLLIN)) |
412 | *fd = pfds[0].fd; | |
413 | else if((pfds[1].revents & POLLIN) && !(pfds[0].revents & POLLIN)) | |
414 | *fd = pfds[1].fd; | |
415 | else if(ret == 2) { | |
416 | *fd = pfds[random()%2].fd; | |
417 | } | |
418 | else | |
419 | *fd = -1; // should never happen | |
3ddb9247 | 420 | |
f4ff5929 BH |
421 | return 1; |
422 | } | |
423 | ||
12c86877 BH |
424 | |
425 | string humanDuration(time_t passed) | |
426 | { | |
427 | ostringstream ret; | |
428 | if(passed<60) | |
429 | ret<<passed<<" seconds"; | |
430 | else if(passed<3600) | |
9e04108d | 431 | ret<<std::setprecision(2)<<passed/60.0<<" minutes"; |
12c86877 | 432 | else if(passed<86400) |
9e04108d | 433 | ret<<std::setprecision(3)<<passed/3600.0<<" hours"; |
12c86877 | 434 | else if(passed<(86400*30.41)) |
9e04108d | 435 | ret<<std::setprecision(3)<<passed/86400.0<<" days"; |
12c86877 | 436 | else |
9e04108d | 437 | ret<<std::setprecision(3)<<passed/(86400*30.41)<<" months"; |
12c86877 BH |
438 | |
439 | return ret.str(); | |
440 | } | |
441 | ||
442 | DTime::DTime() | |
443 | { | |
eefd15f9 | 444 | // set(); // saves lots of gettimeofday calls |
55b6512d | 445 | d_set.tv_sec=d_set.tv_usec=0; |
12c86877 BH |
446 | } |
447 | ||
12c86877 BH |
448 | time_t DTime::time() |
449 | { | |
450 | return d_set.tv_sec; | |
451 | } | |
452 | ||
1d329048 BH |
453 | const string unquotify(const string &item) |
454 | { | |
455 | if(item.size()<2) | |
456 | return item; | |
457 | ||
458 | string::size_type bpos=0, epos=item.size(); | |
12c86877 | 459 | |
3ddb9247 | 460 | if(item[0]=='"') |
1d329048 | 461 | bpos=1; |
c4bee46c | 462 | |
1d329048 BH |
463 | if(item[epos-1]=='"') |
464 | epos-=1; | |
465 | ||
c4bee46c | 466 | return item.substr(bpos,epos-bpos); |
1d329048 | 467 | } |
12c86877 BH |
468 | |
469 | void stripLine(string &line) | |
470 | { | |
bdf40704 | 471 | string::size_type pos=line.find_first_of("\r\n"); |
12c86877 BH |
472 | if(pos!=string::npos) { |
473 | line.resize(pos); | |
474 | } | |
475 | } | |
476 | ||
477 | string urlEncode(const string &text) | |
478 | { | |
479 | string ret; | |
480 | for(string::const_iterator i=text.begin();i!=text.end();++i) | |
481 | if(*i==' ')ret.append("%20"); | |
482 | else ret.append(1,*i); | |
483 | return ret; | |
484 | } | |
485 | ||
486 | string getHostname() | |
487 | { | |
0db70140 | 488 | #ifndef MAXHOSTNAMELEN |
76473b92 | 489 | #define MAXHOSTNAMELEN 255 |
0db70140 | 490 | #endif |
ac2bb9e7 | 491 | |
12c86877 BH |
492 | char tmp[MAXHOSTNAMELEN]; |
493 | if(gethostname(tmp, MAXHOSTNAMELEN)) | |
494 | return "UNKNOWN"; | |
495 | ||
bfbf6814 | 496 | return string(tmp); |
12c86877 BH |
497 | } |
498 | ||
499 | string itoa(int i) | |
500 | { | |
501 | ostringstream o; | |
502 | o<<i; | |
503 | return o.str(); | |
504 | } | |
505 | ||
22c9c86a BH |
506 | string uitoa(unsigned int i) // MSVC 6 doesn't grok overloading (un)signed |
507 | { | |
508 | ostringstream o; | |
509 | o<<i; | |
510 | return o.str(); | |
511 | } | |
512 | ||
d88babea KM |
513 | string bitFlip(const string &str) |
514 | { | |
515 | string::size_type pos=0, epos=str.size(); | |
516 | string ret; | |
517 | ret.reserve(epos); | |
518 | for(;pos < epos; ++pos) | |
519 | ret.append(1, ~str[pos]); | |
520 | return ret; | |
521 | } | |
22c9c86a | 522 | |
a2a81d42 | 523 | string stringerror(int err) |
12c86877 | 524 | { |
a2a81d42 | 525 | return strerror(err); |
12c86877 BH |
526 | } |
527 | ||
a2a81d42 | 528 | string stringerror() |
d3b4137e | 529 | { |
a2a81d42 | 530 | return strerror(errno); |
d3b4137e | 531 | } |
d3b4137e | 532 | |
12c86877 BH |
533 | void cleanSlashes(string &str) |
534 | { | |
535 | string::const_iterator i; | |
536 | string out; | |
537 | for(i=str.begin();i!=str.end();++i) { | |
538 | if(*i=='/' && i!=str.begin() && *(i-1)=='/') | |
539 | continue; | |
540 | out.append(1,*i); | |
541 | } | |
542 | str=out; | |
543 | } | |
544 | ||
7b35aa49 | 545 | |
092f210a | 546 | bool IpToU32(const string &str, uint32_t *ip) |
525b8a7c | 547 | { |
4cf26303 BH |
548 | if(str.empty()) { |
549 | *ip=0; | |
550 | return true; | |
551 | } | |
3ddb9247 | 552 | |
092c9cc4 | 553 | struct in_addr inp; |
3897b9e1 | 554 | if(inet_aton(str.c_str(), &inp)) { |
092c9cc4 BH |
555 | *ip=inp.s_addr; |
556 | return true; | |
557 | } | |
558 | return false; | |
525b8a7c BH |
559 | } |
560 | ||
5730f30c BH |
561 | string U32ToIP(uint32_t val) |
562 | { | |
563 | char tmp[17]; | |
9b2244e1 | 564 | snprintf(tmp, sizeof(tmp), "%u.%u.%u.%u", |
4957a608 BH |
565 | (val >> 24)&0xff, |
566 | (val >> 16)&0xff, | |
567 | (val >> 8)&0xff, | |
568 | (val )&0xff); | |
bfbf6814 | 569 | return string(tmp); |
5730f30c BH |
570 | } |
571 | ||
37d3f960 | 572 | |
2db9c30e BH |
573 | string makeHexDump(const string& str) |
574 | { | |
575 | char tmp[5]; | |
576 | string ret; | |
ea634573 | 577 | ret.reserve((int)(str.size()*2.2)); |
2db9c30e BH |
578 | |
579 | for(string::size_type n=0;n<str.size();++n) { | |
385b86f6 | 580 | snprintf(tmp, sizeof(tmp), "%02x ", (unsigned char)str[n]); |
2db9c30e BH |
581 | ret+=tmp; |
582 | } | |
583 | return ret; | |
584 | } | |
585 | ||
88358c9b BH |
586 | void normalizeTV(struct timeval& tv) |
587 | { | |
588 | if(tv.tv_usec > 1000000) { | |
589 | ++tv.tv_sec; | |
590 | tv.tv_usec-=1000000; | |
591 | } | |
592 | else if(tv.tv_usec < 0) { | |
593 | --tv.tv_sec; | |
594 | tv.tv_usec+=1000000; | |
595 | } | |
596 | } | |
597 | ||
598 | const struct timeval operator+(const struct timeval& lhs, const struct timeval& rhs) | |
599 | { | |
600 | struct timeval ret; | |
601 | ret.tv_sec=lhs.tv_sec + rhs.tv_sec; | |
602 | ret.tv_usec=lhs.tv_usec + rhs.tv_usec; | |
603 | normalizeTV(ret); | |
604 | return ret; | |
605 | } | |
606 | ||
607 | const struct timeval operator-(const struct timeval& lhs, const struct timeval& rhs) | |
608 | { | |
609 | struct timeval ret; | |
610 | ret.tv_sec=lhs.tv_sec - rhs.tv_sec; | |
611 | ret.tv_usec=lhs.tv_usec - rhs.tv_usec; | |
612 | normalizeTV(ret); | |
613 | return ret; | |
614 | } | |
50c79a76 BH |
615 | |
616 | pair<string, string> splitField(const string& inp, char sepa) | |
617 | { | |
618 | pair<string, string> ret; | |
619 | string::size_type cpos=inp.find(sepa); | |
620 | if(cpos==string::npos) | |
621 | ret.first=inp; | |
622 | else { | |
623 | ret.first=inp.substr(0, cpos); | |
624 | ret.second=inp.substr(cpos+1); | |
625 | } | |
626 | return ret; | |
627 | } | |
6e2514e4 | 628 | |
f8499e52 | 629 | int logFacilityToLOG(unsigned int facility) |
6e2514e4 | 630 | { |
6e2514e4 BH |
631 | switch(facility) { |
632 | case 0: | |
633 | return LOG_LOCAL0; | |
634 | case 1: | |
635 | return(LOG_LOCAL1); | |
636 | case 2: | |
637 | return(LOG_LOCAL2); | |
638 | case 3: | |
639 | return(LOG_LOCAL3); | |
640 | case 4: | |
641 | return(LOG_LOCAL4); | |
642 | case 5: | |
643 | return(LOG_LOCAL5); | |
644 | case 6: | |
645 | return(LOG_LOCAL6); | |
646 | case 7: | |
647 | return(LOG_LOCAL7); | |
648 | default: | |
f8499e52 | 649 | return -1; |
6e2514e4 BH |
650 | } |
651 | } | |
da042e6e BH |
652 | |
653 | string stripDot(const string& dom) | |
654 | { | |
655 | if(dom.empty()) | |
656 | return dom; | |
657 | ||
658 | if(dom[dom.size()-1]!='.') | |
659 | return dom; | |
660 | ||
661 | return dom.substr(0,dom.size()-1); | |
662 | } | |
4dadd22f BH |
663 | |
664 | ||
f71bc087 BH |
665 | |
666 | int makeIPv6sockaddr(const std::string& addr, struct sockaddr_in6* ret) | |
667 | { | |
85db02c5 BH |
668 | if(addr.empty()) |
669 | return -1; | |
670 | string ourAddr(addr); | |
6cbfa73b RG |
671 | bool portSet = false; |
672 | unsigned int port; | |
85db02c5 BH |
673 | if(addr[0]=='[') { // [::]:53 style address |
674 | string::size_type pos = addr.find(']'); | |
0047d734 | 675 | if(pos == string::npos) |
85db02c5 BH |
676 | return -1; |
677 | ourAddr.assign(addr.c_str() + 1, pos-1); | |
ed2ff96e | 678 | if (pos + 1 != addr.size()) { // complete after ], no port specified |
0047d734 CH |
679 | if (pos + 2 > addr.size() || addr[pos+1]!=':') |
680 | return -1; | |
681 | try { | |
682 | port = pdns_stou(addr.substr(pos+2)); | |
683 | portSet = true; | |
684 | } | |
d38e2ba9 | 685 | catch(const std::out_of_range&) { |
0047d734 CH |
686 | return -1; |
687 | } | |
5b4ed369 | 688 | } |
85db02c5 | 689 | } |
39d2d9b2 | 690 | ret->sin6_scope_id=0; |
691 | ret->sin6_family=AF_INET6; | |
692 | ||
0c9de4fc | 693 | if(inet_pton(AF_INET6, ourAddr.c_str(), (void*)&ret->sin6_addr) != 1) { |
694 | struct addrinfo* res; | |
695 | struct addrinfo hints; | |
696 | memset(&hints, 0, sizeof(hints)); | |
3ddb9247 | 697 | |
0c9de4fc | 698 | hints.ai_family = AF_INET6; |
699 | hints.ai_flags = AI_NUMERICHOST; | |
3ddb9247 | 700 | |
1746e9bb | 701 | // getaddrinfo has anomalous return codes, anything nonzero is an error, positive or negative |
a5d2c081 | 702 | if (getaddrinfo(ourAddr.c_str(), 0, &hints, &res) != 0) { |
0c9de4fc | 703 | return -1; |
704 | } | |
3ddb9247 | 705 | |
0c9de4fc | 706 | memcpy(ret, res->ai_addr, res->ai_addrlen); |
707 | freeaddrinfo(res); | |
f71bc087 | 708 | } |
0c9de4fc | 709 | |
6cbfa73b RG |
710 | if(portSet) { |
711 | if(port > 65535) | |
712 | return -1; | |
5b4ed369 | 713 | |
85db02c5 | 714 | ret->sin6_port = htons(port); |
6cbfa73b | 715 | } |
0c9de4fc | 716 | |
f71bc087 BH |
717 | return 0; |
718 | } | |
834942f1 | 719 | |
76cb4593 | 720 | int makeIPv4sockaddr(const std::string& str, struct sockaddr_in* ret) |
85db02c5 BH |
721 | { |
722 | if(str.empty()) { | |
723 | return -1; | |
724 | } | |
725 | struct in_addr inp; | |
3ddb9247 | 726 | |
85db02c5 BH |
727 | string::size_type pos = str.find(':'); |
728 | if(pos == string::npos) { // no port specified, not touching the port | |
3897b9e1 | 729 | if(inet_aton(str.c_str(), &inp)) { |
85db02c5 BH |
730 | ret->sin_addr.s_addr=inp.s_addr; |
731 | return 0; | |
732 | } | |
733 | return -1; | |
734 | } | |
735 | if(!*(str.c_str() + pos + 1)) // trailing : | |
3ddb9247 PD |
736 | return -1; |
737 | ||
85db02c5 BH |
738 | char *eptr = (char*)str.c_str() + str.size(); |
739 | int port = strtol(str.c_str() + pos + 1, &eptr, 10); | |
5b4ed369 PL |
740 | if (port < 0 || port > 65535) |
741 | return -1; | |
742 | ||
85db02c5 BH |
743 | if(*eptr) |
744 | return -1; | |
3ddb9247 | 745 | |
85db02c5 | 746 | ret->sin_port = htons(port); |
3897b9e1 | 747 | if(inet_aton(str.substr(0, pos).c_str(), &inp)) { |
85db02c5 BH |
748 | ret->sin_addr.s_addr=inp.s_addr; |
749 | return 0; | |
750 | } | |
751 | return -1; | |
752 | } | |
753 | ||
76cb4593 CH |
754 | int makeUNsockaddr(const std::string& path, struct sockaddr_un* ret) |
755 | { | |
756 | if (path.empty()) | |
757 | return -1; | |
758 | ||
759 | memset(ret, 0, sizeof(struct sockaddr_un)); | |
760 | ret->sun_family = AF_UNIX; | |
761 | if (path.length() >= sizeof(ret->sun_path)) | |
762 | return -1; | |
763 | ||
764 | path.copy(ret->sun_path, sizeof(ret->sun_path), 0); | |
765 | return 0; | |
766 | } | |
85db02c5 | 767 | |
834942f1 BH |
768 | //! read a line of text from a FILE* to a std::string, returns false on 'no data' |
769 | bool stringfgets(FILE* fp, std::string& line) | |
770 | { | |
771 | char buffer[1024]; | |
772 | line.clear(); | |
3ddb9247 | 773 | |
834942f1 BH |
774 | do { |
775 | if(!fgets(buffer, sizeof(buffer), fp)) | |
776 | return !line.empty(); | |
3ddb9247 PD |
777 | |
778 | line.append(buffer); | |
834942f1 BH |
779 | } while(!strchr(buffer, '\n')); |
780 | return true; | |
781 | } | |
e611a06c | 782 | |
4e9a20e6 | 783 | bool readFileIfThere(const char* fname, std::string* line) |
784 | { | |
785 | line->clear(); | |
5e1f23ca | 786 | auto fp = std::unique_ptr<FILE, int(*)(FILE*)>(fopen(fname, "r"), fclose); |
4e9a20e6 | 787 | if(!fp) |
788 | return false; | |
5e1f23ca RG |
789 | stringfgets(fp.get(), *line); |
790 | fp.reset(); | |
791 | ||
4e9a20e6 | 792 | return true; |
793 | } | |
794 | ||
3ee84c3f BH |
795 | Regex::Regex(const string &expr) |
796 | { | |
797 | if(regcomp(&d_preg, expr.c_str(), REG_ICASE|REG_NOSUB|REG_EXTENDED)) | |
3f81d239 | 798 | throw PDNSException("Regular expression did not compile"); |
3ee84c3f | 799 | } |
65d8e171 | 800 | |
25ba7344 PD |
801 | // if you end up here because valgrind told you were are doing something wrong |
802 | // with msgh->msg_controllen, please refer to https://github.com/PowerDNS/pdns/pull/3962 | |
803 | // first. | |
7bec330a | 804 | // Note that cmsgbuf should be aligned the same as a struct cmsghdr |
7bec330a | 805 | void addCMsgSrcAddr(struct msghdr* msgh, cmsgbuf_aligned* cmsgbuf, const ComboAddress* source, int itfIndex) |
65d8e171 | 806 | { |
ecc8571f | 807 | struct cmsghdr *cmsg = NULL; |
65d8e171 KN |
808 | |
809 | if(source->sin4.sin_family == AF_INET6) { | |
810 | struct in6_pktinfo *pkt; | |
811 | ||
812 | msgh->msg_control = cmsgbuf; | |
aeb011b7 RG |
813 | #if !defined( __APPLE__ ) |
814 | /* CMSG_SPACE is not a constexpr on macOS */ | |
7f818542 | 815 | static_assert(CMSG_SPACE(sizeof(*pkt)) <= sizeof(*cmsgbuf), "Buffer is too small for in6_pktinfo"); |
aeb011b7 RG |
816 | #else /* __APPLE__ */ |
817 | if (CMSG_SPACE(sizeof(*pkt)) > sizeof(*cmsgbuf)) { | |
818 | throw std::runtime_error("Buffer is too small for in6_pktinfo"); | |
819 | } | |
820 | #endif /* __APPLE__ */ | |
65d8e171 KN |
821 | msgh->msg_controllen = CMSG_SPACE(sizeof(*pkt)); |
822 | ||
823 | cmsg = CMSG_FIRSTHDR(msgh); | |
824 | cmsg->cmsg_level = IPPROTO_IPV6; | |
825 | cmsg->cmsg_type = IPV6_PKTINFO; | |
826 | cmsg->cmsg_len = CMSG_LEN(sizeof(*pkt)); | |
827 | ||
828 | pkt = (struct in6_pktinfo *) CMSG_DATA(cmsg); | |
20b22895 OM |
829 | // Include the padding to stop valgrind complaining about passing uninitialized data |
830 | memset(pkt, 0, CMSG_SPACE(sizeof(*pkt))); | |
65d8e171 | 831 | pkt->ipi6_addr = source->sin6.sin6_addr; |
fbe2a2e0 | 832 | pkt->ipi6_ifindex = itfIndex; |
65d8e171 KN |
833 | } |
834 | else { | |
4d39d7f3 | 835 | #if defined(IP_PKTINFO) |
65d8e171 KN |
836 | struct in_pktinfo *pkt; |
837 | ||
838 | msgh->msg_control = cmsgbuf; | |
aeb011b7 RG |
839 | #if !defined( __APPLE__ ) |
840 | /* CMSG_SPACE is not a constexpr on macOS */ | |
7f818542 | 841 | static_assert(CMSG_SPACE(sizeof(*pkt)) <= sizeof(*cmsgbuf), "Buffer is too small for in_pktinfo"); |
aeb011b7 RG |
842 | #else /* __APPLE__ */ |
843 | if (CMSG_SPACE(sizeof(*pkt)) > sizeof(*cmsgbuf)) { | |
844 | throw std::runtime_error("Buffer is too small for in_pktinfo"); | |
845 | } | |
846 | #endif /* __APPLE__ */ | |
65d8e171 KN |
847 | msgh->msg_controllen = CMSG_SPACE(sizeof(*pkt)); |
848 | ||
849 | cmsg = CMSG_FIRSTHDR(msgh); | |
850 | cmsg->cmsg_level = IPPROTO_IP; | |
851 | cmsg->cmsg_type = IP_PKTINFO; | |
852 | cmsg->cmsg_len = CMSG_LEN(sizeof(*pkt)); | |
853 | ||
854 | pkt = (struct in_pktinfo *) CMSG_DATA(cmsg); | |
20b22895 OM |
855 | // Include the padding to stop valgrind complaining about passing uninitialized data |
856 | memset(pkt, 0, CMSG_SPACE(sizeof(*pkt))); | |
65d8e171 | 857 | pkt->ipi_spec_dst = source->sin4.sin_addr; |
fbe2a2e0 | 858 | pkt->ipi_ifindex = itfIndex; |
4d39d7f3 | 859 | #elif defined(IP_SENDSRCADDR) |
65d8e171 KN |
860 | struct in_addr *in; |
861 | ||
862 | msgh->msg_control = cmsgbuf; | |
aeb011b7 | 863 | #if !defined( __APPLE__ ) |
7f818542 | 864 | static_assert(CMSG_SPACE(sizeof(*in)) <= sizeof(*cmsgbuf), "Buffer is too small for in_addr"); |
aeb011b7 RG |
865 | #else /* __APPLE__ */ |
866 | if (CMSG_SPACE(sizeof(*in)) > sizeof(*cmsgbuf)) { | |
867 | throw std::runtime_error("Buffer is too small for in_addr"); | |
868 | } | |
869 | #endif /* __APPLE__ */ | |
65d8e171 KN |
870 | msgh->msg_controllen = CMSG_SPACE(sizeof(*in)); |
871 | ||
872 | cmsg = CMSG_FIRSTHDR(msgh); | |
873 | cmsg->cmsg_level = IPPROTO_IP; | |
874 | cmsg->cmsg_type = IP_SENDSRCADDR; | |
875 | cmsg->cmsg_len = CMSG_LEN(sizeof(*in)); | |
876 | ||
20b22895 | 877 | // Include the padding to stop valgrind complaining about passing uninitialized data |
65d8e171 | 878 | in = (struct in_addr *) CMSG_DATA(cmsg); |
20b22895 | 879 | memset(in, 0, CMSG_SPACE(sizeof(*in))); |
65d8e171 | 880 | *in = source->sin4.sin_addr; |
ecc8571f | 881 | #endif |
65d8e171 KN |
882 | } |
883 | } | |
3a8a4d68 | 884 | |
885 | unsigned int getFilenumLimit(bool hardOrSoft) | |
886 | { | |
887 | struct rlimit rlim; | |
888 | if(getrlimit(RLIMIT_NOFILE, &rlim) < 0) | |
889 | unixDie("Requesting number of available file descriptors"); | |
890 | return hardOrSoft ? rlim.rlim_max : rlim.rlim_cur; | |
891 | } | |
892 | ||
893 | void setFilenumLimit(unsigned int lim) | |
894 | { | |
895 | struct rlimit rlim; | |
896 | ||
897 | if(getrlimit(RLIMIT_NOFILE, &rlim) < 0) | |
898 | unixDie("Requesting number of available file descriptors"); | |
899 | rlim.rlim_cur=lim; | |
900 | if(setrlimit(RLIMIT_NOFILE, &rlim) < 0) | |
901 | unixDie("Setting number of available file descriptors"); | |
902 | } | |
06ea9015 | 903 | |
904 | #define burtlemix(a,b,c) \ | |
905 | { \ | |
906 | a -= b; a -= c; a ^= (c>>13); \ | |
907 | b -= c; b -= a; b ^= (a<<8); \ | |
908 | c -= a; c -= b; c ^= (b>>13); \ | |
909 | a -= b; a -= c; a ^= (c>>12); \ | |
910 | b -= c; b -= a; b ^= (a<<16); \ | |
911 | c -= a; c -= b; c ^= (b>>5); \ | |
912 | a -= b; a -= c; a ^= (c>>3); \ | |
913 | b -= c; b -= a; b ^= (a<<10); \ | |
914 | c -= a; c -= b; c ^= (b>>15); \ | |
915 | } | |
916 | ||
917 | uint32_t burtle(const unsigned char* k, uint32_t length, uint32_t initval) | |
918 | { | |
919 | uint32_t a,b,c,len; | |
920 | ||
921 | /* Set up the internal state */ | |
922 | len = length; | |
923 | a = b = 0x9e3779b9; /* the golden ratio; an arbitrary value */ | |
924 | c = initval; /* the previous hash value */ | |
925 | ||
926 | /*---------------------------------------- handle most of the key */ | |
927 | while (len >= 12) { | |
928 | a += (k[0] +((uint32_t)k[1]<<8) +((uint32_t)k[2]<<16) +((uint32_t)k[3]<<24)); | |
929 | b += (k[4] +((uint32_t)k[5]<<8) +((uint32_t)k[6]<<16) +((uint32_t)k[7]<<24)); | |
930 | c += (k[8] +((uint32_t)k[9]<<8) +((uint32_t)k[10]<<16)+((uint32_t)k[11]<<24)); | |
931 | burtlemix(a,b,c); | |
932 | k += 12; len -= 12; | |
933 | } | |
934 | ||
935 | /*------------------------------------- handle the last 11 bytes */ | |
936 | c += length; | |
937 | switch(len) { /* all the case statements fall through */ | |
938 | case 11: c+=((uint32_t)k[10]<<24); | |
d2fe6b5e | 939 | /* fall-through */ |
06ea9015 | 940 | case 10: c+=((uint32_t)k[9]<<16); |
d2fe6b5e | 941 | /* fall-through */ |
06ea9015 | 942 | case 9 : c+=((uint32_t)k[8]<<8); |
943 | /* the first byte of c is reserved for the length */ | |
d2fe6b5e | 944 | /* fall-through */ |
06ea9015 | 945 | case 8 : b+=((uint32_t)k[7]<<24); |
d2fe6b5e | 946 | /* fall-through */ |
06ea9015 | 947 | case 7 : b+=((uint32_t)k[6]<<16); |
d2fe6b5e | 948 | /* fall-through */ |
06ea9015 | 949 | case 6 : b+=((uint32_t)k[5]<<8); |
d2fe6b5e | 950 | /* fall-through */ |
06ea9015 | 951 | case 5 : b+=k[4]; |
d2fe6b5e | 952 | /* fall-through */ |
06ea9015 | 953 | case 4 : a+=((uint32_t)k[3]<<24); |
d2fe6b5e | 954 | /* fall-through */ |
06ea9015 | 955 | case 3 : a+=((uint32_t)k[2]<<16); |
d2fe6b5e | 956 | /* fall-through */ |
06ea9015 | 957 | case 2 : a+=((uint32_t)k[1]<<8); |
d2fe6b5e | 958 | /* fall-through */ |
06ea9015 | 959 | case 1 : a+=k[0]; |
960 | /* case 0: nothing left to add */ | |
961 | } | |
962 | burtlemix(a,b,c); | |
963 | /*-------------------------------------------- report the result */ | |
964 | return c; | |
965 | } | |
9ae194e2 | 966 | |
6200227b | 967 | uint32_t burtleCI(const unsigned char* k, uint32_t length, uint32_t initval) |
968 | { | |
969 | uint32_t a,b,c,len; | |
970 | ||
971 | /* Set up the internal state */ | |
972 | len = length; | |
973 | a = b = 0x9e3779b9; /* the golden ratio; an arbitrary value */ | |
974 | c = initval; /* the previous hash value */ | |
975 | ||
976 | /*---------------------------------------- handle most of the key */ | |
977 | while (len >= 12) { | |
af891b3d | 978 | 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)); |
979 | 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)); | |
980 | 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 | 981 | burtlemix(a,b,c); |
982 | k += 12; len -= 12; | |
983 | } | |
984 | ||
985 | /*------------------------------------- handle the last 11 bytes */ | |
986 | c += length; | |
987 | switch(len) { /* all the case statements fall through */ | |
af891b3d | 988 | case 11: c+=((uint32_t)dns_tolower(k[10])<<24); |
d2fe6b5e | 989 | /* fall-through */ |
af891b3d | 990 | case 10: c+=((uint32_t)dns_tolower(k[9])<<16); |
d2fe6b5e | 991 | /* fall-through */ |
af891b3d | 992 | case 9 : c+=((uint32_t)dns_tolower(k[8])<<8); |
6200227b | 993 | /* the first byte of c is reserved for the length */ |
d2fe6b5e | 994 | /* fall-through */ |
af891b3d | 995 | case 8 : b+=((uint32_t)dns_tolower(k[7])<<24); |
d2fe6b5e | 996 | /* fall-through */ |
af891b3d | 997 | case 7 : b+=((uint32_t)dns_tolower(k[6])<<16); |
d2fe6b5e | 998 | /* fall-through */ |
af891b3d | 999 | case 6 : b+=((uint32_t)dns_tolower(k[5])<<8); |
d2fe6b5e | 1000 | /* fall-through */ |
af891b3d | 1001 | case 5 : b+=dns_tolower(k[4]); |
d2fe6b5e | 1002 | /* fall-through */ |
af891b3d | 1003 | case 4 : a+=((uint32_t)dns_tolower(k[3])<<24); |
d2fe6b5e | 1004 | /* fall-through */ |
af891b3d | 1005 | case 3 : a+=((uint32_t)dns_tolower(k[2])<<16); |
d2fe6b5e | 1006 | /* fall-through */ |
af891b3d | 1007 | case 2 : a+=((uint32_t)dns_tolower(k[1])<<8); |
d2fe6b5e | 1008 | /* fall-through */ |
af891b3d | 1009 | case 1 : a+=dns_tolower(k[0]); |
6200227b | 1010 | /* case 0: nothing left to add */ |
1011 | } | |
1012 | burtlemix(a,b,c); | |
1013 | /*-------------------------------------------- report the result */ | |
1014 | return c; | |
1015 | } | |
1016 | ||
1017 | ||
915b0c39 | 1018 | bool setSocketTimestamps(int fd) |
9ae194e2 | 1019 | { |
eb4c1792 | 1020 | #ifdef SO_TIMESTAMP |
9ae194e2 | 1021 | int on=1; |
915b0c39 | 1022 | return setsockopt(fd, SOL_SOCKET, SO_TIMESTAMP, (char*)&on, sizeof(on)) == 0; |
99be0a43 | 1023 | #else |
915b0c39 | 1024 | return true; // we pretend this happened. |
99be0a43 | 1025 | #endif |
9ae194e2 | 1026 | } |
58044407 | 1027 | |
883a30a7 | 1028 | bool setTCPNoDelay(int sock) |
149d0144 | 1029 | { |
1030 | int flag = 1; | |
883a30a7 RG |
1031 | return setsockopt(sock, /* socket affected */ |
1032 | IPPROTO_TCP, /* set option at TCP level */ | |
1033 | TCP_NODELAY, /* name of option */ | |
1034 | (char *) &flag, /* the cast is historical cruft */ | |
1035 | sizeof(flag)) == 0; /* length of option value */ | |
149d0144 | 1036 | } |
1037 | ||
1038 | ||
3897b9e1 | 1039 | bool setNonBlocking(int sock) |
1040 | { | |
3ddb9247 | 1041 | int flags=fcntl(sock,F_GETFL,0); |
3897b9e1 | 1042 | if(flags<0 || fcntl(sock, F_SETFL,flags|O_NONBLOCK) <0) |
1043 | return false; | |
1044 | return true; | |
1045 | } | |
1046 | ||
1047 | bool setBlocking(int sock) | |
1048 | { | |
3ddb9247 | 1049 | int flags=fcntl(sock,F_GETFL,0); |
3897b9e1 | 1050 | if(flags<0 || fcntl(sock, F_SETFL,flags&(~O_NONBLOCK)) <0) |
1051 | return false; | |
1052 | return true; | |
1053 | } | |
1054 | ||
bf676f2f PL |
1055 | bool setReuseAddr(int sock) |
1056 | { | |
1057 | int tmp = 1; | |
1058 | if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char*)&tmp, static_cast<unsigned>(sizeof tmp))<0) | |
04360367 | 1059 | throw PDNSException(string("Setsockopt failed: ")+stringerror()); |
bf676f2f PL |
1060 | return true; |
1061 | } | |
1062 | ||
18861f97 RG |
1063 | bool isNonBlocking(int sock) |
1064 | { | |
1065 | int flags=fcntl(sock,F_GETFL,0); | |
1066 | return flags & O_NONBLOCK; | |
1067 | } | |
1068 | ||
29bb743c OM |
1069 | bool setReceiveSocketErrors(int sock, int af) |
1070 | { | |
1071 | #ifdef __linux__ | |
1072 | int tmp = 1, ret; | |
1073 | if (af == AF_INET) { | |
1074 | ret = setsockopt(sock, IPPROTO_IP, IP_RECVERR, &tmp, sizeof(tmp)); | |
1075 | } else { | |
1076 | ret = setsockopt(sock, IPPROTO_IPV6, IPV6_RECVERR, &tmp, sizeof(tmp)); | |
1077 | } | |
1078 | if (ret < 0) { | |
04360367 | 1079 | throw PDNSException(string("Setsockopt failed: ") + stringerror()); |
29bb743c OM |
1080 | } |
1081 | #endif | |
1082 | return true; | |
1083 | } | |
1084 | ||
3897b9e1 | 1085 | // Closes a socket. |
1086 | int closesocket( int socket ) | |
1087 | { | |
1088 | int ret=::close(socket); | |
1089 | if(ret < 0 && errno == ECONNRESET) // see ticket 192, odd BSD behaviour | |
1090 | return 0; | |
3ddb9247 | 1091 | if(ret < 0) |
3897b9e1 | 1092 | throw PDNSException("Error closing socket: "+stringerror()); |
1093 | return ret; | |
1094 | } | |
1095 | ||
1096 | bool setCloseOnExec(int sock) | |
1097 | { | |
3ddb9247 | 1098 | int flags=fcntl(sock,F_GETFD,0); |
3897b9e1 | 1099 | if(flags<0 || fcntl(sock, F_SETFD,flags|FD_CLOEXEC) <0) |
1100 | return false; | |
1101 | return true; | |
1102 | } | |
1103 | ||
6907f014 | 1104 | string getMACAddress(const ComboAddress& ca) |
1105 | { | |
1106 | string ret; | |
1107 | #ifdef __linux__ | |
1108 | ifstream ifs("/proc/net/arp"); | |
1109 | if(!ifs) | |
1110 | return ret; | |
1111 | string line; | |
1112 | string match=ca.toString()+' '; | |
1113 | while(getline(ifs, line)) { | |
1114 | if(boost::starts_with(line, match)) { | |
1115 | vector<string> parts; | |
1116 | stringtok(parts, line, " \n\t\r"); | |
1117 | if(parts.size() < 4) | |
1118 | return ret; | |
1119 | unsigned int tmp[6]; | |
1120 | sscanf(parts[3].c_str(), "%02x:%02x:%02x:%02x:%02x:%02x", tmp, tmp+1, tmp+2, tmp+3, tmp+4, tmp+5); | |
1121 | for(int i = 0 ; i< 6 ; ++i) | |
1122 | ret.append(1, (char)tmp[i]); | |
1123 | return ret; | |
1124 | } | |
1125 | } | |
1126 | #endif | |
1127 | return ret; | |
1128 | } | |
1129 | ||
8290ad9f | 1130 | uint64_t udpErrorStats(const std::string& str) |
1131 | { | |
1132 | #ifdef __linux__ | |
1133 | ifstream ifs("/proc/net/snmp"); | |
1134 | if(!ifs) | |
1135 | return 0; | |
1136 | string line; | |
1137 | vector<string> parts; | |
1138 | while(getline(ifs,line)) { | |
1139 | if(boost::starts_with(line, "Udp: ") && isdigit(line[5])) { | |
1140 | stringtok(parts, line, " \n\t\r"); | |
1141 | if(parts.size() < 7) | |
1142 | break; | |
1143 | if(str=="udp-rcvbuf-errors") | |
335da0ba | 1144 | return std::stoull(parts[5]); |
8290ad9f | 1145 | else if(str=="udp-sndbuf-errors") |
335da0ba | 1146 | return std::stoull(parts[6]); |
8290ad9f | 1147 | else if(str=="udp-noport-errors") |
335da0ba | 1148 | return std::stoull(parts[2]); |
8290ad9f | 1149 | else if(str=="udp-in-errors") |
335da0ba | 1150 | return std::stoull(parts[3]); |
8290ad9f | 1151 | else |
1152 | return 0; | |
1153 | } | |
1154 | } | |
1155 | #endif | |
1156 | return 0; | |
1157 | } | |
da15912b | 1158 | |
591d1bd3 RG |
1159 | uint64_t getCPUIOWait(const std::string& str) |
1160 | { | |
1161 | #ifdef __linux__ | |
1162 | ifstream ifs("/proc/stat"); | |
1163 | if (!ifs) { | |
1164 | return 0; | |
1165 | } | |
1166 | ||
1167 | string line; | |
1168 | vector<string> parts; | |
1169 | while (getline(ifs, line)) { | |
1170 | if (boost::starts_with(line, "cpu ")) { | |
1171 | stringtok(parts, line, " \n\t\r"); | |
1172 | ||
1173 | if (parts.size() < 6) { | |
1174 | break; | |
1175 | } | |
1176 | ||
1177 | return std::stoull(parts[5]); | |
1178 | } | |
1179 | } | |
1180 | #endif | |
1181 | return 0; | |
1182 | } | |
1183 | ||
1184 | uint64_t getCPUSteal(const std::string& str) | |
1185 | { | |
1186 | #ifdef __linux__ | |
1187 | ifstream ifs("/proc/stat"); | |
1188 | if (!ifs) { | |
1189 | return 0; | |
1190 | } | |
1191 | ||
1192 | string line; | |
1193 | vector<string> parts; | |
1194 | while (getline(ifs, line)) { | |
1195 | if (boost::starts_with(line, "cpu ")) { | |
1196 | stringtok(parts, line, " \n\t\r"); | |
1197 | ||
1198 | if (parts.size() < 9) { | |
1199 | break; | |
1200 | } | |
1201 | ||
1202 | return std::stoull(parts[8]); | |
1203 | } | |
1204 | } | |
1205 | #endif | |
1206 | return 0; | |
1207 | } | |
1208 | ||
21a3792f | 1209 | bool getTSIGHashEnum(const DNSName& algoName, TSIGHashEnum& algoEnum) |
da15912b | 1210 | { |
2330c421 | 1211 | if (algoName == DNSName("hmac-md5.sig-alg.reg.int") || algoName == DNSName("hmac-md5")) |
da15912b | 1212 | algoEnum = TSIG_MD5; |
2330c421 | 1213 | else if (algoName == DNSName("hmac-sha1")) |
da15912b | 1214 | algoEnum = TSIG_SHA1; |
2330c421 | 1215 | else if (algoName == DNSName("hmac-sha224")) |
da15912b | 1216 | algoEnum = TSIG_SHA224; |
2330c421 | 1217 | else if (algoName == DNSName("hmac-sha256")) |
da15912b | 1218 | algoEnum = TSIG_SHA256; |
2330c421 | 1219 | else if (algoName == DNSName("hmac-sha384")) |
da15912b | 1220 | algoEnum = TSIG_SHA384; |
2330c421 | 1221 | else if (algoName == DNSName("hmac-sha512")) |
da15912b | 1222 | algoEnum = TSIG_SHA512; |
2330c421 | 1223 | else if (algoName == DNSName("gss-tsig")) |
bcb5b94e | 1224 | algoEnum = TSIG_GSS; |
da15912b AT |
1225 | else { |
1226 | return false; | |
1227 | } | |
1228 | return true; | |
1229 | } | |
bfd4efae | 1230 | |
21a3792f | 1231 | DNSName getTSIGAlgoName(TSIGHashEnum& algoEnum) |
bfd4efae AT |
1232 | { |
1233 | switch(algoEnum) { | |
8171ab83 | 1234 | case TSIG_MD5: return DNSName("hmac-md5.sig-alg.reg.int."); |
1235 | case TSIG_SHA1: return DNSName("hmac-sha1."); | |
1236 | case TSIG_SHA224: return DNSName("hmac-sha224."); | |
1237 | case TSIG_SHA256: return DNSName("hmac-sha256."); | |
1238 | case TSIG_SHA384: return DNSName("hmac-sha384."); | |
1239 | case TSIG_SHA512: return DNSName("hmac-sha512."); | |
1240 | case TSIG_GSS: return DNSName("gss-tsig."); | |
bfd4efae AT |
1241 | } |
1242 | throw PDNSException("getTSIGAlgoName does not understand given algorithm, please fix!"); | |
1243 | } | |
a1a787dc | 1244 | |
a9b6db56 | 1245 | uint64_t getOpenFileDescriptors(const std::string&) |
1246 | { | |
1247 | #ifdef __linux__ | |
1248 | DIR* dirhdl=opendir(("/proc/"+std::to_string(getpid())+"/fd/").c_str()); | |
1249 | if(!dirhdl) | |
1250 | return 0; | |
1251 | ||
1252 | struct dirent *entry; | |
1253 | int ret=0; | |
1254 | while((entry = readdir(dirhdl))) { | |
335da0ba AT |
1255 | uint32_t num; |
1256 | try { | |
1257 | num = pdns_stou(entry->d_name); | |
1258 | } catch (...) { | |
1259 | continue; // was not a number. | |
1260 | } | |
a9b6db56 | 1261 | if(std::to_string(num) == entry->d_name) |
1262 | ret++; | |
1263 | } | |
1264 | closedir(dirhdl); | |
1265 | return ret; | |
1266 | ||
1267 | #else | |
1268 | return 0; | |
1269 | #endif | |
1270 | } | |
1271 | ||
a1a787dc | 1272 | uint64_t getRealMemoryUsage(const std::string&) |
1273 | { | |
330dcb5c | 1274 | #ifdef __linux__ |
16101f83 | 1275 | ifstream ifs("/proc/self/statm"); |
330dcb5c OM |
1276 | if(!ifs) |
1277 | return 0; | |
1278 | ||
1279 | uint64_t size, resident, shared, text, lib, data; | |
1280 | ifs >> size >> resident >> shared >> text >> lib >> data; | |
1281 | ||
1282 | return data * getpagesize(); | |
1283 | #else | |
1284 | struct rusage ru; | |
1285 | if (getrusage(RUSAGE_SELF, &ru) != 0) | |
1286 | return 0; | |
1287 | return ru.ru_maxrss * 1024; | |
1288 | #endif | |
1289 | } | |
1290 | ||
1291 | ||
1292 | uint64_t getSpecialMemoryUsage(const std::string&) | |
1293 | { | |
a1a787dc | 1294 | #ifdef __linux__ |
16101f83 | 1295 | ifstream ifs("/proc/self/smaps"); |
a1a787dc | 1296 | if(!ifs) |
1297 | return 0; | |
1298 | string line; | |
1299 | uint64_t bytes=0; | |
1300 | string header("Private_Dirty:"); | |
1301 | while(getline(ifs, line)) { | |
1302 | if(boost::starts_with(line, header)) { | |
335da0ba | 1303 | bytes += std::stoull(line.substr(header.length() + 1))*1024; |
a1a787dc | 1304 | } |
1305 | } | |
1306 | return bytes; | |
1307 | #else | |
1308 | return 0; | |
1309 | #endif | |
1310 | } | |
4f99f3d3 RG |
1311 | |
1312 | uint64_t getCPUTimeUser(const std::string&) | |
1313 | { | |
1314 | struct rusage ru; | |
1315 | getrusage(RUSAGE_SELF, &ru); | |
1316 | return (ru.ru_utime.tv_sec*1000ULL + ru.ru_utime.tv_usec/1000); | |
1317 | } | |
1318 | ||
1319 | uint64_t getCPUTimeSystem(const std::string&) | |
1320 | { | |
1321 | struct rusage ru; | |
1322 | getrusage(RUSAGE_SELF, &ru); | |
1323 | return (ru.ru_stime.tv_sec*1000ULL + ru.ru_stime.tv_usec/1000); | |
1324 | } | |
3fcaeeac | 1325 | |
1326 | double DiffTime(const struct timespec& first, const struct timespec& second) | |
1327 | { | |
1328 | int seconds=second.tv_sec - first.tv_sec; | |
1329 | int nseconds=second.tv_nsec - first.tv_nsec; | |
1330 | ||
1331 | if(nseconds < 0) { | |
1332 | seconds-=1; | |
1333 | nseconds+=1000000000; | |
1334 | } | |
1335 | return seconds + nseconds/1000000000.0; | |
1336 | } | |
1337 | ||
1338 | double DiffTime(const struct timeval& first, const struct timeval& second) | |
1339 | { | |
1340 | int seconds=second.tv_sec - first.tv_sec; | |
1341 | int useconds=second.tv_usec - first.tv_usec; | |
1342 | ||
1343 | if(useconds < 0) { | |
1344 | seconds-=1; | |
1345 | useconds+=1000000; | |
1346 | } | |
1347 | return seconds + useconds/1000000.0; | |
1348 | } | |
ffb07158 | 1349 | |
ffb07158 | 1350 | uid_t strToUID(const string &str) |
1351 | { | |
1352 | uid_t result = 0; | |
1353 | const char * cstr = str.c_str(); | |
1354 | struct passwd * pwd = getpwnam(cstr); | |
1355 | ||
1356 | if (pwd == NULL) { | |
e805cba5 | 1357 | long long val; |
ffb07158 | 1358 | |
e805cba5 RG |
1359 | try { |
1360 | val = stoll(str); | |
ffb07158 | 1361 | } |
e805cba5 RG |
1362 | catch(std::exception& e) { |
1363 | throw runtime_error((boost::format("Error: Unable to parse user ID %s") % cstr).str() ); | |
1364 | } | |
1365 | ||
1366 | if (val < std::numeric_limits<uid_t>::min() || val > std::numeric_limits<uid_t>::max()) { | |
1367 | throw runtime_error((boost::format("Error: Unable to parse user ID %s") % cstr).str() ); | |
ffb07158 | 1368 | } |
e805cba5 RG |
1369 | |
1370 | result = static_cast<uid_t>(val); | |
ffb07158 | 1371 | } |
1372 | else { | |
1373 | result = pwd->pw_uid; | |
1374 | } | |
1375 | ||
1376 | return result; | |
1377 | } | |
1378 | ||
1379 | gid_t strToGID(const string &str) | |
1380 | { | |
1381 | gid_t result = 0; | |
1382 | const char * cstr = str.c_str(); | |
1383 | struct group * grp = getgrnam(cstr); | |
1384 | ||
1385 | if (grp == NULL) { | |
e805cba5 | 1386 | long long val; |
ffb07158 | 1387 | |
e805cba5 RG |
1388 | try { |
1389 | val = stoll(str); | |
ffb07158 | 1390 | } |
e805cba5 RG |
1391 | catch(std::exception& e) { |
1392 | throw runtime_error((boost::format("Error: Unable to parse group ID %s") % cstr).str() ); | |
1393 | } | |
1394 | ||
1395 | if (val < std::numeric_limits<gid_t>::min() || val > std::numeric_limits<gid_t>::max()) { | |
1396 | throw runtime_error((boost::format("Error: Unable to parse group ID %s") % cstr).str() ); | |
ffb07158 | 1397 | } |
e805cba5 RG |
1398 | |
1399 | result = static_cast<gid_t>(val); | |
ffb07158 | 1400 | } |
1401 | else { | |
1402 | result = grp->gr_gid; | |
1403 | } | |
1404 | ||
1405 | return result; | |
1406 | } | |
1407 | ||
335da0ba | 1408 | unsigned int pdns_stou(const std::string& str, size_t * idx, int base) |
a5c4e4a6 | 1409 | { |
00f45062 | 1410 | if (str.empty()) return 0; // compatibility |
2f975181 PD |
1411 | unsigned long result; |
1412 | try { | |
1413 | result = std::stoul(str, idx, base); | |
1414 | } | |
1415 | catch(std::invalid_argument& e) { | |
1416 | throw std::invalid_argument(string(e.what()) + "; (invalid argument during std::stoul); data was \""+str+"\""); | |
1417 | } | |
cccfa59b PD |
1418 | catch(std::out_of_range& e) { |
1419 | throw std::out_of_range(string(e.what()) + "; (out of range during std::stoul); data was \""+str+"\""); | |
1420 | } | |
a5c4e4a6 | 1421 | if (result > std::numeric_limits<unsigned int>::max()) { |
cccfa59b | 1422 | throw std::out_of_range("stoul returned result out of unsigned int range; data was \""+str+"\""); |
a5c4e4a6 AT |
1423 | } |
1424 | return static_cast<unsigned int>(result); | |
1425 | } | |
1426 | ||
8fd25133 RG |
1427 | bool isSettingThreadCPUAffinitySupported() |
1428 | { | |
1429 | #ifdef HAVE_PTHREAD_SETAFFINITY_NP | |
1430 | return true; | |
1431 | #else | |
1432 | return false; | |
1433 | #endif | |
1434 | } | |
1435 | ||
1436 | int mapThreadToCPUList(pthread_t tid, const std::set<int>& cpus) | |
1437 | { | |
1438 | #ifdef HAVE_PTHREAD_SETAFFINITY_NP | |
4d39d7f3 TIH |
1439 | # ifdef __NetBSD__ |
1440 | cpuset_t *cpuset; | |
1441 | cpuset = cpuset_create(); | |
1442 | for (const auto cpuID : cpus) { | |
1443 | cpuset_set(cpuID, cpuset); | |
1444 | } | |
1445 | ||
1446 | return pthread_setaffinity_np(tid, | |
1447 | cpuset_size(cpuset), | |
1448 | cpuset); | |
1449 | # else | |
1450 | # ifdef __FreeBSD__ | |
1451 | # define cpu_set_t cpuset_t | |
1452 | # endif | |
8fd25133 RG |
1453 | cpu_set_t cpuset; |
1454 | CPU_ZERO(&cpuset); | |
1455 | for (const auto cpuID : cpus) { | |
1456 | CPU_SET(cpuID, &cpuset); | |
1457 | } | |
1458 | ||
1459 | return pthread_setaffinity_np(tid, | |
1460 | sizeof(cpuset), | |
1461 | &cpuset); | |
4d39d7f3 | 1462 | # endif |
99be0a43 | 1463 | #else |
8fd25133 | 1464 | return ENOSYS; |
99be0a43 | 1465 | #endif /* HAVE_PTHREAD_SETAFFINITY_NP */ |
8fd25133 | 1466 | } |
5d4e1ef8 RG |
1467 | |
1468 | std::vector<ComboAddress> getResolvers(const std::string& resolvConfPath) | |
1469 | { | |
1470 | std::vector<ComboAddress> results; | |
1471 | ||
1472 | ifstream ifs(resolvConfPath); | |
1473 | if (!ifs) { | |
1474 | return results; | |
1475 | } | |
1476 | ||
1477 | string line; | |
1478 | while(std::getline(ifs, line)) { | |
1479 | boost::trim_right_if(line, is_any_of(" \r\n\x1a")); | |
1480 | boost::trim_left(line); // leading spaces, let's be nice | |
1481 | ||
1482 | string::size_type tpos = line.find_first_of(";#"); | |
1483 | if (tpos != string::npos) { | |
1484 | line.resize(tpos); | |
1485 | } | |
1486 | ||
1487 | if (boost::starts_with(line, "nameserver ") || boost::starts_with(line, "nameserver\t")) { | |
1488 | vector<string> parts; | |
1489 | stringtok(parts, line, " \t,"); // be REALLY nice | |
1490 | for(vector<string>::const_iterator iter = parts.begin() + 1; iter != parts.end(); ++iter) { | |
1491 | try { | |
1492 | results.emplace_back(*iter, 53); | |
1493 | } | |
1494 | catch(...) | |
1495 | { | |
1496 | } | |
1497 | } | |
1498 | } | |
1499 | } | |
1500 | ||
1501 | return results; | |
1502 | } | |
ee271fc4 RG |
1503 | |
1504 | size_t getPipeBufferSize(int fd) | |
1505 | { | |
1506 | #ifdef F_GETPIPE_SZ | |
1507 | int res = fcntl(fd, F_GETPIPE_SZ); | |
1508 | if (res == -1) { | |
1509 | return 0; | |
1510 | } | |
1511 | return res; | |
1512 | #else | |
1513 | errno = ENOSYS; | |
1514 | return 0; | |
1515 | #endif /* F_GETPIPE_SZ */ | |
1516 | } | |
1517 | ||
1518 | bool setPipeBufferSize(int fd, size_t size) | |
1519 | { | |
1520 | #ifdef F_SETPIPE_SZ | |
1521 | if (size > std::numeric_limits<int>::max()) { | |
1522 | errno = EINVAL; | |
1523 | return false; | |
1524 | } | |
1525 | int newSize = static_cast<int>(size); | |
1526 | int res = fcntl(fd, F_SETPIPE_SZ, newSize); | |
1527 | if (res == -1) { | |
1528 | return false; | |
1529 | } | |
1530 | return true; | |
1531 | #else | |
1532 | errno = ENOSYS; | |
1533 | return false; | |
1534 | #endif /* F_SETPIPE_SZ */ | |
1535 | } | |
ef3ee606 RG |
1536 | |
1537 | DNSName reverseNameFromIP(const ComboAddress& ip) | |
1538 | { | |
1539 | if (ip.isIPv4()) { | |
1540 | std::string result("in-addr.arpa."); | |
1541 | auto ptr = reinterpret_cast<const uint8_t*>(&ip.sin4.sin_addr.s_addr); | |
1542 | for (size_t idx = 0; idx < sizeof(ip.sin4.sin_addr.s_addr); idx++) { | |
1543 | result = std::to_string(ptr[idx]) + "." + result; | |
1544 | } | |
1545 | return DNSName(result); | |
1546 | } | |
1547 | else if (ip.isIPv6()) { | |
1548 | std::string result("ip6.arpa."); | |
1549 | auto ptr = reinterpret_cast<const uint8_t*>(&ip.sin6.sin6_addr.s6_addr[0]); | |
1550 | for (size_t idx = 0; idx < sizeof(ip.sin6.sin6_addr.s6_addr); idx++) { | |
1551 | std::stringstream stream; | |
1552 | stream << std::hex << (ptr[idx] & 0x0F); | |
1553 | stream << '.'; | |
1554 | stream << std::hex << (((ptr[idx]) >> 4) & 0x0F); | |
1555 | stream << '.'; | |
1556 | result = stream.str() + result; | |
1557 | } | |
1558 | return DNSName(result); | |
1559 | } | |
1560 | ||
1561 | throw std::runtime_error("Calling reverseNameFromIP() for an address which is neither an IPv4 nor an IPv6"); | |
1562 | } |