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Commit | Line | Data |
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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 | */ | |
1f63a8c3 | 22 | |
870a0fe4 AT |
23 | #ifdef HAVE_CONFIG_H |
24 | #include "config.h" | |
25 | #endif | |
1f63a8c3 | 26 | |
705f31ae | 27 | #include <sys/param.h> |
22cf1fda | 28 | #include <sys/socket.h> |
3897b9e1 | 29 | #include <fcntl.h> |
705f31ae BH |
30 | #include <netdb.h> |
31 | #include <sys/time.h> | |
1f63a8c3 | 32 | #include <ctime> |
3a8a4d68 | 33 | #include <sys/resource.h> |
705f31ae | 34 | #include <netinet/in.h> |
76cb4593 | 35 | #include <sys/un.h> |
705f31ae | 36 | #include <unistd.h> |
8290ad9f | 37 | #include <fstream> |
12c86877 BH |
38 | #include "misc.hh" |
39 | #include <vector> | |
66910c5d | 40 | #include <string> |
12c86877 | 41 | #include <sstream> |
da78b86e | 42 | #include <cerrno> |
1258abe0 | 43 | #include <cstring> |
c4bee46c | 44 | #include <iostream> |
a9b6db56 | 45 | #include <sys/types.h> |
46 | #include <dirent.h> | |
705f31ae | 47 | #include <algorithm> |
fab091b9 | 48 | #include <poll.h> |
12c86877 | 49 | #include <iomanip> |
149d0144 | 50 | #include <netinet/tcp.h> |
e24c61ed | 51 | #include <optional> |
1f63a8c3 FM |
52 | #include <cstdlib> |
53 | #include <cstdio> | |
5c409fa2 | 54 | #include "pdnsexception.hh" |
040712e0 | 55 | #include <boost/algorithm/string.hpp> |
a48e03da | 56 | #include <boost/format.hpp> |
65d8e171 | 57 | #include "iputils.hh" |
e325f20c | 58 | #include "dnsparser.hh" |
ffb07158 | 59 | #include <pwd.h> |
60 | #include <grp.h> | |
1f63a8c3 | 61 | #include <climits> |
6c78a20e R |
62 | #ifdef __FreeBSD__ |
63 | # include <pthread_np.h> | |
64 | #endif | |
4d39d7f3 TIH |
65 | #ifdef __NetBSD__ |
66 | # include <pthread.h> | |
67 | # include <sched.h> | |
68 | #endif | |
a61e8e59 | 69 | |
66910c5d FM |
70 | #if defined(HAVE_LIBCRYPTO) |
71 | #include <openssl/err.h> | |
72 | #endif // HAVE_LIBCRYPTO | |
73 | ||
d2adfa5c | 74 | size_t writen2(int fileDesc, const void *buf, size_t count) |
040712e0 | 75 | { |
d2adfa5c | 76 | const char *ptr = static_cast<const char*>(buf); |
040712e0 | 77 | const char *eptr = ptr + count; |
3ddb9247 | 78 | |
d2adfa5c OM |
79 | while (ptr != eptr) { |
80 | auto res = ::write(fileDesc, ptr, eptr - ptr); | |
81 | if (res < 0) { | |
82 | if (errno == EAGAIN) { | |
4957a608 | 83 | throw std::runtime_error("used writen2 on non-blocking socket, got EAGAIN"); |
d2adfa5c OM |
84 | } |
85 | unixDie("failed in writen2"); | |
040712e0 | 86 | } |
d2adfa5c | 87 | else if (res == 0) { |
040712e0 | 88 | throw std::runtime_error("could not write all bytes, got eof in writen2"); |
d2adfa5c | 89 | } |
3ddb9247 | 90 | |
d2adfa5c | 91 | ptr += res; |
040712e0 | 92 | } |
3ddb9247 | 93 | |
040712e0 BH |
94 | return count; |
95 | } | |
96 | ||
a683e8bd | 97 | size_t readn2(int fd, void* buffer, size_t len) |
36fbf590 | 98 | { |
a683e8bd RG |
99 | size_t pos=0; |
100 | ssize_t res; | |
36fbf590 | 101 | for(;;) { |
102 | res = read(fd, (char*)buffer + pos, len - pos); | |
3ddb9247 | 103 | if(res == 0) |
3f6d07a4 | 104 | throw runtime_error("EOF while reading message"); |
36fbf590 | 105 | if(res < 0) { |
106 | if (errno == EAGAIN) | |
3f6d07a4 | 107 | throw std::runtime_error("used readn2 on non-blocking socket, got EAGAIN"); |
36fbf590 | 108 | else |
3f6d07a4 | 109 | unixDie("failed in readn2"); |
3ddb9247 PD |
110 | } |
111 | ||
a683e8bd | 112 | pos+=(size_t)res; |
36fbf590 | 113 | if(pos == len) |
114 | break; | |
115 | } | |
116 | return len; | |
117 | } | |
118 | ||
1342b949 | 119 | size_t readn2WithTimeout(int fd, void* buffer, size_t len, const struct timeval& idleTimeout, const struct timeval& totalTimeout, bool allowIncomplete) |
3f6d07a4 RG |
120 | { |
121 | size_t pos = 0; | |
50111728 O |
122 | struct timeval start{0,0}; |
123 | struct timeval remainingTime = totalTimeout; | |
124 | if (totalTimeout.tv_sec != 0 || totalTimeout.tv_usec != 0) { | |
125 | gettimeofday(&start, nullptr); | |
9396d955 RG |
126 | } |
127 | ||
3f6d07a4 RG |
128 | do { |
129 | ssize_t got = read(fd, (char *)buffer + pos, len - pos); | |
130 | if (got > 0) { | |
131 | pos += (size_t) got; | |
1342b949 RG |
132 | if (allowIncomplete) { |
133 | break; | |
134 | } | |
3f6d07a4 RG |
135 | } |
136 | else if (got == 0) { | |
137 | throw runtime_error("EOF while reading message"); | |
138 | } | |
139 | else { | |
140 | if (errno == EAGAIN) { | |
50111728 O |
141 | struct timeval w = ((totalTimeout.tv_sec == 0 && totalTimeout.tv_usec == 0) || idleTimeout <= remainingTime) ? idleTimeout : remainingTime; |
142 | int res = waitForData(fd, w.tv_sec, w.tv_usec); | |
3f6d07a4 RG |
143 | if (res > 0) { |
144 | /* there is data available */ | |
145 | } | |
146 | else if (res == 0) { | |
147 | throw runtime_error("Timeout while waiting for data to read"); | |
148 | } else { | |
149 | throw runtime_error("Error while waiting for data to read"); | |
150 | } | |
151 | } | |
152 | else { | |
153 | unixDie("failed in readn2WithTimeout"); | |
154 | } | |
155 | } | |
9396d955 | 156 | |
50111728 O |
157 | if (totalTimeout.tv_sec != 0 || totalTimeout.tv_usec != 0) { |
158 | struct timeval now; | |
159 | gettimeofday(&now, nullptr); | |
160 | struct timeval elapsed = now - start; | |
161 | if (remainingTime < elapsed) { | |
9396d955 RG |
162 | throw runtime_error("Timeout while reading data"); |
163 | } | |
164 | start = now; | |
50111728 | 165 | remainingTime = remainingTime - elapsed; |
9396d955 | 166 | } |
3f6d07a4 RG |
167 | } |
168 | while (pos < len); | |
169 | ||
170 | return len; | |
171 | } | |
172 | ||
50111728 | 173 | size_t writen2WithTimeout(int fd, const void * buffer, size_t len, const struct timeval& timeout) |
3f6d07a4 RG |
174 | { |
175 | size_t pos = 0; | |
176 | do { | |
f1b2ae9b | 177 | ssize_t written = write(fd, reinterpret_cast<const char *>(buffer) + pos, len - pos); |
3f6d07a4 RG |
178 | |
179 | if (written > 0) { | |
180 | pos += (size_t) written; | |
181 | } | |
182 | else if (written == 0) | |
183 | throw runtime_error("EOF while writing message"); | |
184 | else { | |
185 | if (errno == EAGAIN) { | |
50111728 | 186 | int res = waitForRWData(fd, false, timeout.tv_sec, timeout.tv_usec); |
3f6d07a4 RG |
187 | if (res > 0) { |
188 | /* there is room available */ | |
189 | } | |
190 | else if (res == 0) { | |
191 | throw runtime_error("Timeout while waiting to write data"); | |
192 | } else { | |
193 | throw runtime_error("Error while waiting for room to write data"); | |
194 | } | |
195 | } | |
196 | else { | |
197 | unixDie("failed in write2WithTimeout"); | |
198 | } | |
199 | } | |
200 | } | |
201 | while (pos < len); | |
202 | ||
203 | return len; | |
204 | } | |
12c86877 | 205 | |
da78b86e FM |
206 | auto pdns::getMessageFromErrno(const int errnum) -> std::string |
207 | { | |
208 | const size_t errLen = 2048; | |
209 | std::string errMsgData{}; | |
210 | errMsgData.resize(errLen); | |
211 | ||
212 | const char* errMsg = nullptr; | |
60c8f3f5 | 213 | #ifdef STRERROR_R_CHAR_P |
da78b86e FM |
214 | errMsg = strerror_r(errnum, errMsgData.data(), errMsgData.length()); |
215 | #else | |
216 | // This can fail, and when it does, it sets errno. We ignore that and | |
217 | // set our own error message instead. | |
218 | int res = strerror_r(errnum, errMsgData.data(), errMsgData.length()); | |
219 | errMsg = errMsgData.c_str(); | |
220 | if (res != 0) { | |
221 | errMsg = "Unknown (the exact error could not be retrieved)"; | |
222 | } | |
223 | #endif | |
224 | ||
225 | // We make a copy here because `strerror_r()` might return a static | |
226 | // immutable buffer for an error message. The copy shouldn't be | |
227 | // critical though, we're on the bailout/error-handling path anyways. | |
228 | std::string message{errMsg}; | |
229 | return message; | |
230 | } | |
231 | ||
66910c5d FM |
232 | #if defined(HAVE_LIBCRYPTO) |
233 | auto pdns::OpenSSL::error(const std::string& errorMessage) -> std::runtime_error | |
234 | { | |
235 | unsigned long errorCode = 0; | |
236 | auto fullErrorMessage{errorMessage}; | |
237 | #if OPENSSL_VERSION_MAJOR >= 3 | |
238 | const char* filename = nullptr; | |
239 | const char* functionName = nullptr; | |
240 | int lineNumber = 0; | |
241 | while ((errorCode = ERR_get_error_all(&filename, &lineNumber, &functionName, nullptr, nullptr)) != 0) { | |
242 | fullErrorMessage += std::string(": ") + std::to_string(errorCode); | |
243 | ||
244 | const auto* lib = ERR_lib_error_string(errorCode); | |
245 | if (lib != nullptr) { | |
246 | fullErrorMessage += std::string(":") + lib; | |
247 | } | |
248 | ||
249 | const auto* reason = ERR_reason_error_string(errorCode); | |
250 | if (reason != nullptr) { | |
251 | fullErrorMessage += std::string("::") + reason; | |
252 | } | |
253 | ||
254 | if (filename != nullptr) { | |
255 | fullErrorMessage += std::string(" - ") + filename; | |
256 | } | |
257 | if (lineNumber != 0) { | |
258 | fullErrorMessage += std::string(":") + std::to_string(lineNumber); | |
259 | } | |
260 | if (functionName != nullptr) { | |
261 | fullErrorMessage += std::string(" - ") + functionName; | |
262 | } | |
263 | } | |
264 | #else | |
265 | while ((errorCode = ERR_get_error()) != 0) { | |
266 | fullErrorMessage += std::string(": ") + std::to_string(errorCode); | |
267 | ||
268 | const auto* lib = ERR_lib_error_string(errorCode); | |
269 | if (lib != nullptr) { | |
270 | fullErrorMessage += std::string(":") + lib; | |
271 | } | |
272 | ||
273 | const auto* func = ERR_func_error_string(errorCode); | |
274 | if (func != nullptr) { | |
275 | fullErrorMessage += std::string(":") + func; | |
276 | } | |
277 | ||
278 | const auto* reason = ERR_reason_error_string(errorCode); | |
279 | if (reason != nullptr) { | |
280 | fullErrorMessage += std::string("::") + reason; | |
281 | } | |
282 | } | |
283 | #endif | |
284 | return std::runtime_error(fullErrorMessage); | |
285 | } | |
286 | ||
287 | auto pdns::OpenSSL::error(const std::string& componentName, const std::string& errorMessage) -> std::runtime_error | |
288 | { | |
289 | return pdns::OpenSSL::error(componentName + ": " + errorMessage); | |
290 | } | |
291 | #endif // HAVE_LIBCRYPTO | |
292 | ||
cc3afe25 BH |
293 | string nowTime() |
294 | { | |
74ab661c | 295 | time_t now = time(nullptr); |
d2adfa5c OM |
296 | struct tm theTime{}; |
297 | localtime_r(&now, &theTime); | |
298 | std::array<char, 30> buffer{}; | |
74ab661c | 299 | // YYYY-mm-dd HH:MM:SS TZOFF |
d2adfa5c | 300 | size_t ret = strftime(buffer.data(), buffer.size(), "%F %T %z", &theTime); |
d291045e OM |
301 | if (ret == 0) { |
302 | buffer[0] = '\0'; | |
303 | } | |
d2adfa5c | 304 | return {buffer.data()}; |
b636533b BH |
305 | } |
306 | ||
d2adfa5c | 307 | static bool ciEqual(const string& lhs, const string& rhs) |
49bd5a20 | 308 | { |
d2adfa5c | 309 | if (lhs.size() != rhs.size()) { |
49bd5a20 | 310 | return false; |
d2adfa5c | 311 | } |
49bd5a20 | 312 | |
d2adfa5c OM |
313 | string::size_type pos = 0; |
314 | const string::size_type epos = lhs.size(); | |
315 | for (; pos < epos; ++pos) { | |
316 | if (dns_tolower(lhs[pos]) != dns_tolower(rhs[pos])) { | |
49bd5a20 | 317 | return false; |
d2adfa5c OM |
318 | } |
319 | } | |
49bd5a20 BH |
320 | return true; |
321 | } | |
322 | ||
728485ca | 323 | /** does domain end on suffix? Is smart about "wwwds9a.nl" "ds9a.nl" not matching */ |
a683e8bd | 324 | static bool endsOn(const string &domain, const string &suffix) |
728485ca | 325 | { |
d2adfa5c | 326 | if( suffix.empty() || ciEqual(domain, suffix) ) { |
728485ca | 327 | return true; |
d2adfa5c | 328 | } |
7738a23f | 329 | |
d2adfa5c | 330 | if(domain.size() <= suffix.size()) { |
728485ca | 331 | return false; |
d2adfa5c | 332 | } |
3ddb9247 | 333 | |
d2adfa5c OM |
334 | string::size_type dpos = domain.size() - suffix.size() - 1; |
335 | string::size_type spos = 0; | |
7738a23f | 336 | |
d2adfa5c | 337 | if (domain[dpos++] != '.') { |
49bd5a20 | 338 | return false; |
d2adfa5c | 339 | } |
728485ca | 340 | |
d2adfa5c OM |
341 | for(; dpos < domain.size(); ++dpos, ++spos) { |
342 | if (dns_tolower(domain[dpos]) != dns_tolower(suffix[spos])) { | |
49bd5a20 | 343 | return false; |
d2adfa5c OM |
344 | } |
345 | } | |
49bd5a20 BH |
346 | |
347 | return true; | |
348 | } | |
f2c11a48 | 349 | |
a683e8bd RG |
350 | /** strips a domain suffix from a domain, returns true if it stripped */ |
351 | bool stripDomainSuffix(string *qname, const string &domain) | |
352 | { | |
d2adfa5c | 353 | if (!endsOn(*qname, domain)) { |
a683e8bd | 354 | return false; |
d2adfa5c | 355 | } |
a683e8bd | 356 | |
d2adfa5c | 357 | if (toLower(*qname) == toLower(domain)) { |
a683e8bd | 358 | *qname="@"; |
d2adfa5c | 359 | } |
a683e8bd | 360 | else { |
d2adfa5c | 361 | if ((*qname)[qname->size() - domain.size() - 1] != '.') { |
a683e8bd | 362 | return false; |
d2adfa5c | 363 | } |
a683e8bd | 364 | |
d2adfa5c | 365 | qname->resize(qname->size() - domain.size()-1); |
a683e8bd RG |
366 | } |
367 | return true; | |
368 | } | |
369 | ||
1fb3f0fc | 370 | // returns -1 in case if error, 0 if no data is available, 1 if there is. In the first two cases, errno is set |
d2adfa5c | 371 | int waitForData(int fileDesc, int seconds, int useconds) |
649a88df | 372 | { |
d2adfa5c | 373 | return waitForRWData(fileDesc, true, seconds, useconds); |
649a88df BH |
374 | } |
375 | ||
d2adfa5c | 376 | int waitForRWData(int fileDesc, bool waitForRead, int seconds, int useconds, bool* error, bool* disconnected) |
12c86877 | 377 | { |
d2adfa5c | 378 | struct pollfd pfd{}; |
fab091b9 | 379 | memset(&pfd, 0, sizeof(pfd)); |
d2adfa5c | 380 | pfd.fd = fileDesc; |
3ddb9247 | 381 | |
d2adfa5c OM |
382 | if (waitForRead) { |
383 | pfd.events = POLLIN; | |
384 | } | |
385 | else { | |
386 | pfd.events = POLLOUT; | |
387 | } | |
1258abe0 | 388 | |
d2adfa5c | 389 | int ret = poll(&pfd, 1, seconds * 1000 + useconds/1000); |
e07c3801 | 390 | if (ret > 0) { |
d2adfa5c | 391 | if ((error != nullptr) && (pfd.revents & POLLERR) != 0) { |
51959320 RG |
392 | *error = true; |
393 | } | |
d2adfa5c | 394 | if ((disconnected != nullptr) && (pfd.revents & POLLHUP) != 0) { |
51959320 RG |
395 | *disconnected = true; |
396 | } | |
397 | } | |
1258abe0 | 398 | |
12c86877 BH |
399 | return ret; |
400 | } | |
401 | ||
a71bee29 | 402 | // 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 | 403 | int waitForMultiData(const set<int>& fds, const int seconds, const int useconds, int* fdOut) { |
d529011f PL |
404 | set<int> realFDs; |
405 | for (const auto& fd : fds) { | |
406 | if (fd >= 0 && realFDs.count(fd) == 0) { | |
407 | realFDs.insert(fd); | |
408 | } | |
409 | } | |
410 | ||
dcc0e65d | 411 | std::vector<struct pollfd> pfds(realFDs.size()); |
c2a16005 | 412 | memset(pfds.data(), 0, realFDs.size()*sizeof(struct pollfd)); |
d529011f PL |
413 | int ctr = 0; |
414 | for (const auto& fd : realFDs) { | |
415 | pfds[ctr].fd = fd; | |
416 | pfds[ctr].events = POLLIN; | |
417 | ctr++; | |
418 | } | |
419 | ||
420 | int ret; | |
421 | if(seconds >= 0) | |
c2a16005 | 422 | ret = poll(pfds.data(), realFDs.size(), seconds * 1000 + useconds/1000); |
d529011f | 423 | else |
c2a16005 | 424 | ret = poll(pfds.data(), realFDs.size(), -1); |
d529011f PL |
425 | if(ret <= 0) |
426 | return ret; | |
427 | ||
428 | set<int> pollinFDs; | |
aca9c605 PL |
429 | for (const auto& pfd : pfds) { |
430 | if (pfd.revents & POLLIN) { | |
431 | pollinFDs.insert(pfd.fd); | |
d529011f | 432 | } |
d529011f PL |
433 | } |
434 | set<int>::const_iterator it(pollinFDs.begin()); | |
435 | advance(it, random() % pollinFDs.size()); | |
dc058f65 | 436 | *fdOut = *it; |
d529011f PL |
437 | return 1; |
438 | } | |
439 | ||
a71bee29 | 440 | // 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 |
441 | int waitFor2Data(int fd1, int fd2, int seconds, int useconds, int*fd) |
442 | { | |
443 | int ret; | |
444 | ||
445 | struct pollfd pfds[2]; | |
446 | memset(&pfds[0], 0, 2*sizeof(struct pollfd)); | |
447 | pfds[0].fd = fd1; | |
448 | pfds[1].fd = fd2; | |
3ddb9247 | 449 | |
f4ff5929 BH |
450 | pfds[0].events= pfds[1].events = POLLIN; |
451 | ||
452 | int nsocks = 1 + (fd2 >= 0); // fd2 can optionally be -1 | |
453 | ||
454 | if(seconds >= 0) | |
455 | ret = poll(pfds, nsocks, seconds * 1000 + useconds/1000); | |
456 | else | |
457 | ret = poll(pfds, nsocks, -1); | |
458 | if(!ret || ret < 0) | |
459 | return ret; | |
3ddb9247 | 460 | |
f4ff5929 BH |
461 | if((pfds[0].revents & POLLIN) && !(pfds[1].revents & POLLIN)) |
462 | *fd = pfds[0].fd; | |
463 | else if((pfds[1].revents & POLLIN) && !(pfds[0].revents & POLLIN)) | |
464 | *fd = pfds[1].fd; | |
465 | else if(ret == 2) { | |
466 | *fd = pfds[random()%2].fd; | |
467 | } | |
468 | else | |
469 | *fd = -1; // should never happen | |
3ddb9247 | 470 | |
f4ff5929 BH |
471 | return 1; |
472 | } | |
473 | ||
12c86877 BH |
474 | |
475 | string humanDuration(time_t passed) | |
476 | { | |
477 | ostringstream ret; | |
478 | if(passed<60) | |
479 | ret<<passed<<" seconds"; | |
480 | else if(passed<3600) | |
9e04108d | 481 | ret<<std::setprecision(2)<<passed/60.0<<" minutes"; |
12c86877 | 482 | else if(passed<86400) |
9e04108d | 483 | ret<<std::setprecision(3)<<passed/3600.0<<" hours"; |
12c86877 | 484 | else if(passed<(86400*30.41)) |
9e04108d | 485 | ret<<std::setprecision(3)<<passed/86400.0<<" days"; |
12c86877 | 486 | else |
9e04108d | 487 | ret<<std::setprecision(3)<<passed/(86400*30.41)<<" months"; |
12c86877 BH |
488 | |
489 | return ret.str(); | |
490 | } | |
491 | ||
d2adfa5c | 492 | string unquotify(const string &item) |
1d329048 BH |
493 | { |
494 | if(item.size()<2) | |
495 | return item; | |
496 | ||
497 | string::size_type bpos=0, epos=item.size(); | |
12c86877 | 498 | |
3ddb9247 | 499 | if(item[0]=='"') |
1d329048 | 500 | bpos=1; |
c4bee46c | 501 | |
1d329048 BH |
502 | if(item[epos-1]=='"') |
503 | epos-=1; | |
504 | ||
c4bee46c | 505 | return item.substr(bpos,epos-bpos); |
1d329048 | 506 | } |
12c86877 BH |
507 | |
508 | void stripLine(string &line) | |
509 | { | |
bdf40704 | 510 | string::size_type pos=line.find_first_of("\r\n"); |
12c86877 BH |
511 | if(pos!=string::npos) { |
512 | line.resize(pos); | |
513 | } | |
514 | } | |
515 | ||
516 | string urlEncode(const string &text) | |
517 | { | |
518 | string ret; | |
d7f67000 RP |
519 | for(char i : text) |
520 | if(i==' ')ret.append("%20"); | |
521 | else ret.append(1,i); | |
12c86877 BH |
522 | return ret; |
523 | } | |
524 | ||
ff32c991 | 525 | static size_t getMaxHostNameSize() |
12c86877 | 526 | { |
ff32c991 FM |
527 | #if defined(HOST_NAME_MAX) |
528 | return HOST_NAME_MAX; | |
0db70140 | 529 | #endif |
ac2bb9e7 | 530 | |
ff32c991 FM |
531 | #if defined(_SC_HOST_NAME_MAX) |
532 | auto tmp = sysconf(_SC_HOST_NAME_MAX); | |
533 | if (tmp != -1) { | |
534 | return tmp; | |
535 | } | |
536 | #endif | |
12c86877 | 537 | |
ff32c991 FM |
538 | const size_t maxHostNameSize = 255; |
539 | return maxHostNameSize; | |
540 | } | |
541 | ||
542 | std::optional<string> getHostname() | |
543 | { | |
544 | const size_t maxHostNameBufSize = getMaxHostNameSize() + 1; | |
545 | std::string hostname; | |
546 | hostname.resize(maxHostNameBufSize, 0); | |
547 | ||
548 | if (gethostname(hostname.data(), maxHostNameBufSize) == -1) { | |
549 | return std::nullopt; | |
550 | } | |
551 | ||
552 | hostname.resize(strlen(hostname.c_str())); | |
553 | return std::make_optional(hostname); | |
554 | } | |
555 | ||
556 | std::string getCarbonHostName() | |
557 | { | |
558 | auto hostname = getHostname(); | |
559 | if (!hostname.has_value()) { | |
560 | throw std::runtime_error(stringerror()); | |
561 | } | |
562 | ||
563 | boost::replace_all(*hostname, ".", "_"); | |
564 | return *hostname; | |
12c86877 BH |
565 | } |
566 | ||
d88babea KM |
567 | string bitFlip(const string &str) |
568 | { | |
569 | string::size_type pos=0, epos=str.size(); | |
570 | string ret; | |
571 | ret.reserve(epos); | |
572 | for(;pos < epos; ++pos) | |
573 | ret.append(1, ~str[pos]); | |
574 | return ret; | |
575 | } | |
22c9c86a | 576 | |
12c86877 BH |
577 | void cleanSlashes(string &str) |
578 | { | |
579 | string::const_iterator i; | |
580 | string out; | |
581 | for(i=str.begin();i!=str.end();++i) { | |
582 | if(*i=='/' && i!=str.begin() && *(i-1)=='/') | |
583 | continue; | |
584 | out.append(1,*i); | |
585 | } | |
586 | str=out; | |
587 | } | |
588 | ||
7b35aa49 | 589 | |
092f210a | 590 | bool IpToU32(const string &str, uint32_t *ip) |
525b8a7c | 591 | { |
4cf26303 BH |
592 | if(str.empty()) { |
593 | *ip=0; | |
594 | return true; | |
595 | } | |
3ddb9247 | 596 | |
092c9cc4 | 597 | struct in_addr inp; |
3897b9e1 | 598 | if(inet_aton(str.c_str(), &inp)) { |
092c9cc4 BH |
599 | *ip=inp.s_addr; |
600 | return true; | |
601 | } | |
602 | return false; | |
525b8a7c BH |
603 | } |
604 | ||
5730f30c BH |
605 | string U32ToIP(uint32_t val) |
606 | { | |
607 | char tmp[17]; | |
9b2244e1 | 608 | snprintf(tmp, sizeof(tmp), "%u.%u.%u.%u", |
4957a608 BH |
609 | (val >> 24)&0xff, |
610 | (val >> 16)&0xff, | |
611 | (val >> 8)&0xff, | |
612 | (val )&0xff); | |
bfbf6814 | 613 | return string(tmp); |
5730f30c BH |
614 | } |
615 | ||
37d3f960 | 616 | |
2db9c30e BH |
617 | string makeHexDump(const string& str) |
618 | { | |
8c7a1b8a | 619 | std::array<char, 5> tmp; |
2db9c30e | 620 | string ret; |
8c7a1b8a | 621 | ret.reserve(static_cast<size_t>(str.size()*2.2)); |
2db9c30e | 622 | |
8c7a1b8a RG |
623 | for (char n : str) { |
624 | snprintf(tmp.data(), tmp.size(), "%02x ", static_cast<unsigned char>(n)); | |
625 | ret += tmp.data(); | |
2db9c30e BH |
626 | } |
627 | return ret; | |
628 | } | |
629 | ||
a02d0fa6 PL |
630 | string makeBytesFromHex(const string &in) { |
631 | if (in.size() % 2 != 0) { | |
632 | throw std::range_error("odd number of bytes in hex string"); | |
633 | } | |
634 | string ret; | |
50953de8 RG |
635 | ret.reserve(in.size() / 2); |
636 | ||
50953de8 RG |
637 | for (size_t i = 0; i < in.size(); i += 2) { |
638 | const auto numStr = in.substr(i, 2); | |
7f73a566 | 639 | unsigned int num = 0; |
50953de8 RG |
640 | if (sscanf(numStr.c_str(), "%02x", &num) != 1) { |
641 | throw std::range_error("Invalid value while parsing the hex string '" + in + "'"); | |
642 | } | |
643 | ret.push_back(static_cast<uint8_t>(num)); | |
a02d0fa6 | 644 | } |
50953de8 | 645 | |
a02d0fa6 PL |
646 | return ret; |
647 | } | |
648 | ||
88358c9b BH |
649 | void normalizeTV(struct timeval& tv) |
650 | { | |
651 | if(tv.tv_usec > 1000000) { | |
652 | ++tv.tv_sec; | |
653 | tv.tv_usec-=1000000; | |
654 | } | |
655 | else if(tv.tv_usec < 0) { | |
656 | --tv.tv_sec; | |
657 | tv.tv_usec+=1000000; | |
658 | } | |
659 | } | |
660 | ||
d2adfa5c | 661 | struct timeval operator+(const struct timeval& lhs, const struct timeval& rhs) |
88358c9b BH |
662 | { |
663 | struct timeval ret; | |
664 | ret.tv_sec=lhs.tv_sec + rhs.tv_sec; | |
665 | ret.tv_usec=lhs.tv_usec + rhs.tv_usec; | |
666 | normalizeTV(ret); | |
667 | return ret; | |
668 | } | |
669 | ||
d2adfa5c | 670 | struct timeval operator-(const struct timeval& lhs, const struct timeval& rhs) |
88358c9b BH |
671 | { |
672 | struct timeval ret; | |
673 | ret.tv_sec=lhs.tv_sec - rhs.tv_sec; | |
674 | ret.tv_usec=lhs.tv_usec - rhs.tv_usec; | |
675 | normalizeTV(ret); | |
676 | return ret; | |
677 | } | |
50c79a76 BH |
678 | |
679 | pair<string, string> splitField(const string& inp, char sepa) | |
680 | { | |
681 | pair<string, string> ret; | |
682 | string::size_type cpos=inp.find(sepa); | |
683 | if(cpos==string::npos) | |
684 | ret.first=inp; | |
685 | else { | |
686 | ret.first=inp.substr(0, cpos); | |
687 | ret.second=inp.substr(cpos+1); | |
688 | } | |
689 | return ret; | |
690 | } | |
6e2514e4 | 691 | |
f8499e52 | 692 | int logFacilityToLOG(unsigned int facility) |
6e2514e4 | 693 | { |
6e2514e4 BH |
694 | switch(facility) { |
695 | case 0: | |
696 | return LOG_LOCAL0; | |
697 | case 1: | |
698 | return(LOG_LOCAL1); | |
699 | case 2: | |
700 | return(LOG_LOCAL2); | |
701 | case 3: | |
702 | return(LOG_LOCAL3); | |
703 | case 4: | |
704 | return(LOG_LOCAL4); | |
705 | case 5: | |
706 | return(LOG_LOCAL5); | |
707 | case 6: | |
708 | return(LOG_LOCAL6); | |
709 | case 7: | |
710 | return(LOG_LOCAL7); | |
711 | default: | |
f8499e52 | 712 | return -1; |
6e2514e4 BH |
713 | } |
714 | } | |
da042e6e BH |
715 | |
716 | string stripDot(const string& dom) | |
717 | { | |
718 | if(dom.empty()) | |
719 | return dom; | |
720 | ||
721 | if(dom[dom.size()-1]!='.') | |
722 | return dom; | |
723 | ||
724 | return dom.substr(0,dom.size()-1); | |
725 | } | |
4dadd22f | 726 | |
f71bc087 BH |
727 | int makeIPv6sockaddr(const std::string& addr, struct sockaddr_in6* ret) |
728 | { | |
1a736a1a | 729 | if (addr.empty()) { |
85db02c5 | 730 | return -1; |
1a736a1a FM |
731 | } |
732 | ||
85db02c5 | 733 | string ourAddr(addr); |
1a736a1a FM |
734 | std::optional<uint16_t> port = std::nullopt; |
735 | ||
3a9b5bc5 | 736 | if (addr[0] == '[') { // [::]:53 style address |
85db02c5 | 737 | string::size_type pos = addr.find(']'); |
1a736a1a | 738 | if (pos == string::npos) { |
85db02c5 | 739 | return -1; |
1a736a1a FM |
740 | } |
741 | ||
3a9b5bc5 | 742 | ourAddr.assign(addr.c_str() + 1, pos - 1); |
ed2ff96e | 743 | if (pos + 1 != addr.size()) { // complete after ], no port specified |
1a736a1a | 744 | if (pos + 2 > addr.size() || addr[pos + 1] != ':') { |
0047d734 | 745 | return -1; |
1a736a1a FM |
746 | } |
747 | ||
0047d734 | 748 | try { |
1a736a1a FM |
749 | auto tmpPort = pdns::checked_stoi<uint16_t>(addr.substr(pos + 2)); |
750 | port = std::make_optional(tmpPort); | |
0047d734 | 751 | } |
3a9b5bc5 | 752 | catch (const std::out_of_range&) { |
0047d734 CH |
753 | return -1; |
754 | } | |
5b4ed369 | 755 | } |
85db02c5 | 756 | } |
1a736a1a | 757 | |
3a9b5bc5 FM |
758 | ret->sin6_scope_id = 0; |
759 | ret->sin6_family = AF_INET6; | |
39d2d9b2 | 760 | |
3a9b5bc5 | 761 | if (inet_pton(AF_INET6, ourAddr.c_str(), (void*)&ret->sin6_addr) != 1) { |
1a736a1a FM |
762 | struct addrinfo hints{}; |
763 | std::memset(&hints, 0, sizeof(struct addrinfo)); | |
0c9de4fc | 764 | hints.ai_flags = AI_NUMERICHOST; |
1a736a1a | 765 | hints.ai_family = AF_INET6; |
3ddb9247 | 766 | |
1a736a1a | 767 | struct addrinfo* res = nullptr; |
1746e9bb | 768 | // getaddrinfo has anomalous return codes, anything nonzero is an error, positive or negative |
4646277d | 769 | if (getaddrinfo(ourAddr.c_str(), nullptr, &hints, &res) != 0) { |
0c9de4fc | 770 | return -1; |
771 | } | |
3ddb9247 | 772 | |
0c9de4fc | 773 | memcpy(ret, res->ai_addr, res->ai_addrlen); |
774 | freeaddrinfo(res); | |
f71bc087 | 775 | } |
0c9de4fc | 776 | |
1a736a1a FM |
777 | if (port.has_value()) { |
778 | ret->sin6_port = htons(*port); | |
6cbfa73b | 779 | } |
0c9de4fc | 780 | |
f71bc087 BH |
781 | return 0; |
782 | } | |
834942f1 | 783 | |
76cb4593 | 784 | int makeIPv4sockaddr(const std::string& str, struct sockaddr_in* ret) |
85db02c5 BH |
785 | { |
786 | if(str.empty()) { | |
787 | return -1; | |
788 | } | |
789 | struct in_addr inp; | |
3ddb9247 | 790 | |
85db02c5 BH |
791 | string::size_type pos = str.find(':'); |
792 | if(pos == string::npos) { // no port specified, not touching the port | |
3897b9e1 | 793 | if(inet_aton(str.c_str(), &inp)) { |
85db02c5 BH |
794 | ret->sin_addr.s_addr=inp.s_addr; |
795 | return 0; | |
796 | } | |
797 | return -1; | |
798 | } | |
799 | if(!*(str.c_str() + pos + 1)) // trailing : | |
3ddb9247 PD |
800 | return -1; |
801 | ||
f1b2ae9b | 802 | char *eptr = const_cast<char*>(str.c_str()) + str.size(); |
85db02c5 | 803 | int port = strtol(str.c_str() + pos + 1, &eptr, 10); |
5b4ed369 PL |
804 | if (port < 0 || port > 65535) |
805 | return -1; | |
806 | ||
85db02c5 BH |
807 | if(*eptr) |
808 | return -1; | |
3ddb9247 | 809 | |
85db02c5 | 810 | ret->sin_port = htons(port); |
3897b9e1 | 811 | if(inet_aton(str.substr(0, pos).c_str(), &inp)) { |
85db02c5 BH |
812 | ret->sin_addr.s_addr=inp.s_addr; |
813 | return 0; | |
814 | } | |
815 | return -1; | |
816 | } | |
817 | ||
76cb4593 CH |
818 | int makeUNsockaddr(const std::string& path, struct sockaddr_un* ret) |
819 | { | |
820 | if (path.empty()) | |
821 | return -1; | |
822 | ||
823 | memset(ret, 0, sizeof(struct sockaddr_un)); | |
824 | ret->sun_family = AF_UNIX; | |
825 | if (path.length() >= sizeof(ret->sun_path)) | |
826 | return -1; | |
827 | ||
828 | path.copy(ret->sun_path, sizeof(ret->sun_path), 0); | |
829 | return 0; | |
830 | } | |
85db02c5 | 831 | |
834942f1 BH |
832 | //! read a line of text from a FILE* to a std::string, returns false on 'no data' |
833 | bool stringfgets(FILE* fp, std::string& line) | |
834 | { | |
835 | char buffer[1024]; | |
836 | line.clear(); | |
3ddb9247 | 837 | |
834942f1 BH |
838 | do { |
839 | if(!fgets(buffer, sizeof(buffer), fp)) | |
840 | return !line.empty(); | |
3ddb9247 PD |
841 | |
842 | line.append(buffer); | |
834942f1 BH |
843 | } while(!strchr(buffer, '\n')); |
844 | return true; | |
845 | } | |
e611a06c | 846 | |
4e9a20e6 | 847 | bool readFileIfThere(const char* fname, std::string* line) |
848 | { | |
849 | line->clear(); | |
5e1f23ca | 850 | auto fp = std::unique_ptr<FILE, int(*)(FILE*)>(fopen(fname, "r"), fclose); |
11917b03 | 851 | if (!fp) { |
4e9a20e6 | 852 | return false; |
11917b03 OM |
853 | } |
854 | return stringfgets(fp.get(), *line); | |
4e9a20e6 | 855 | } |
856 | ||
3ee84c3f BH |
857 | Regex::Regex(const string &expr) |
858 | { | |
859 | if(regcomp(&d_preg, expr.c_str(), REG_ICASE|REG_NOSUB|REG_EXTENDED)) | |
3f81d239 | 860 | throw PDNSException("Regular expression did not compile"); |
3ee84c3f | 861 | } |
65d8e171 | 862 | |
25ba7344 PD |
863 | // if you end up here because valgrind told you were are doing something wrong |
864 | // with msgh->msg_controllen, please refer to https://github.com/PowerDNS/pdns/pull/3962 | |
865 | // first. | |
7bec330a | 866 | // Note that cmsgbuf should be aligned the same as a struct cmsghdr |
7bec330a | 867 | void addCMsgSrcAddr(struct msghdr* msgh, cmsgbuf_aligned* cmsgbuf, const ComboAddress* source, int itfIndex) |
65d8e171 | 868 | { |
4646277d | 869 | struct cmsghdr *cmsg = nullptr; |
65d8e171 KN |
870 | |
871 | if(source->sin4.sin_family == AF_INET6) { | |
872 | struct in6_pktinfo *pkt; | |
873 | ||
874 | msgh->msg_control = cmsgbuf; | |
aeb011b7 RG |
875 | #if !defined( __APPLE__ ) |
876 | /* CMSG_SPACE is not a constexpr on macOS */ | |
7f818542 | 877 | static_assert(CMSG_SPACE(sizeof(*pkt)) <= sizeof(*cmsgbuf), "Buffer is too small for in6_pktinfo"); |
aeb011b7 RG |
878 | #else /* __APPLE__ */ |
879 | if (CMSG_SPACE(sizeof(*pkt)) > sizeof(*cmsgbuf)) { | |
880 | throw std::runtime_error("Buffer is too small for in6_pktinfo"); | |
881 | } | |
882 | #endif /* __APPLE__ */ | |
65d8e171 KN |
883 | msgh->msg_controllen = CMSG_SPACE(sizeof(*pkt)); |
884 | ||
885 | cmsg = CMSG_FIRSTHDR(msgh); | |
886 | cmsg->cmsg_level = IPPROTO_IPV6; | |
887 | cmsg->cmsg_type = IPV6_PKTINFO; | |
888 | cmsg->cmsg_len = CMSG_LEN(sizeof(*pkt)); | |
889 | ||
890 | pkt = (struct in6_pktinfo *) CMSG_DATA(cmsg); | |
20b22895 OM |
891 | // Include the padding to stop valgrind complaining about passing uninitialized data |
892 | memset(pkt, 0, CMSG_SPACE(sizeof(*pkt))); | |
65d8e171 | 893 | pkt->ipi6_addr = source->sin6.sin6_addr; |
fbe2a2e0 | 894 | pkt->ipi6_ifindex = itfIndex; |
65d8e171 KN |
895 | } |
896 | else { | |
4d39d7f3 | 897 | #if defined(IP_PKTINFO) |
65d8e171 KN |
898 | struct in_pktinfo *pkt; |
899 | ||
900 | msgh->msg_control = cmsgbuf; | |
aeb011b7 RG |
901 | #if !defined( __APPLE__ ) |
902 | /* CMSG_SPACE is not a constexpr on macOS */ | |
7f818542 | 903 | static_assert(CMSG_SPACE(sizeof(*pkt)) <= sizeof(*cmsgbuf), "Buffer is too small for in_pktinfo"); |
aeb011b7 RG |
904 | #else /* __APPLE__ */ |
905 | if (CMSG_SPACE(sizeof(*pkt)) > sizeof(*cmsgbuf)) { | |
906 | throw std::runtime_error("Buffer is too small for in_pktinfo"); | |
907 | } | |
908 | #endif /* __APPLE__ */ | |
65d8e171 KN |
909 | msgh->msg_controllen = CMSG_SPACE(sizeof(*pkt)); |
910 | ||
911 | cmsg = CMSG_FIRSTHDR(msgh); | |
912 | cmsg->cmsg_level = IPPROTO_IP; | |
913 | cmsg->cmsg_type = IP_PKTINFO; | |
914 | cmsg->cmsg_len = CMSG_LEN(sizeof(*pkt)); | |
915 | ||
916 | pkt = (struct in_pktinfo *) CMSG_DATA(cmsg); | |
20b22895 OM |
917 | // Include the padding to stop valgrind complaining about passing uninitialized data |
918 | memset(pkt, 0, CMSG_SPACE(sizeof(*pkt))); | |
65d8e171 | 919 | pkt->ipi_spec_dst = source->sin4.sin_addr; |
fbe2a2e0 | 920 | pkt->ipi_ifindex = itfIndex; |
4d39d7f3 | 921 | #elif defined(IP_SENDSRCADDR) |
65d8e171 KN |
922 | struct in_addr *in; |
923 | ||
924 | msgh->msg_control = cmsgbuf; | |
aeb011b7 | 925 | #if !defined( __APPLE__ ) |
7f818542 | 926 | static_assert(CMSG_SPACE(sizeof(*in)) <= sizeof(*cmsgbuf), "Buffer is too small for in_addr"); |
aeb011b7 RG |
927 | #else /* __APPLE__ */ |
928 | if (CMSG_SPACE(sizeof(*in)) > sizeof(*cmsgbuf)) { | |
929 | throw std::runtime_error("Buffer is too small for in_addr"); | |
930 | } | |
931 | #endif /* __APPLE__ */ | |
65d8e171 KN |
932 | msgh->msg_controllen = CMSG_SPACE(sizeof(*in)); |
933 | ||
934 | cmsg = CMSG_FIRSTHDR(msgh); | |
935 | cmsg->cmsg_level = IPPROTO_IP; | |
936 | cmsg->cmsg_type = IP_SENDSRCADDR; | |
937 | cmsg->cmsg_len = CMSG_LEN(sizeof(*in)); | |
938 | ||
20b22895 | 939 | // Include the padding to stop valgrind complaining about passing uninitialized data |
65d8e171 | 940 | in = (struct in_addr *) CMSG_DATA(cmsg); |
20b22895 | 941 | memset(in, 0, CMSG_SPACE(sizeof(*in))); |
65d8e171 | 942 | *in = source->sin4.sin_addr; |
ecc8571f | 943 | #endif |
65d8e171 KN |
944 | } |
945 | } | |
3a8a4d68 | 946 | |
947 | unsigned int getFilenumLimit(bool hardOrSoft) | |
948 | { | |
949 | struct rlimit rlim; | |
950 | if(getrlimit(RLIMIT_NOFILE, &rlim) < 0) | |
951 | unixDie("Requesting number of available file descriptors"); | |
952 | return hardOrSoft ? rlim.rlim_max : rlim.rlim_cur; | |
953 | } | |
954 | ||
955 | void setFilenumLimit(unsigned int lim) | |
956 | { | |
957 | struct rlimit rlim; | |
958 | ||
959 | if(getrlimit(RLIMIT_NOFILE, &rlim) < 0) | |
960 | unixDie("Requesting number of available file descriptors"); | |
961 | rlim.rlim_cur=lim; | |
962 | if(setrlimit(RLIMIT_NOFILE, &rlim) < 0) | |
963 | unixDie("Setting number of available file descriptors"); | |
964 | } | |
06ea9015 | 965 | |
915b0c39 | 966 | bool setSocketTimestamps(int fd) |
9ae194e2 | 967 | { |
eb4c1792 | 968 | #ifdef SO_TIMESTAMP |
9ae194e2 | 969 | int on=1; |
915b0c39 | 970 | return setsockopt(fd, SOL_SOCKET, SO_TIMESTAMP, (char*)&on, sizeof(on)) == 0; |
99be0a43 | 971 | #else |
915b0c39 | 972 | return true; // we pretend this happened. |
99be0a43 | 973 | #endif |
9ae194e2 | 974 | } |
58044407 | 975 | |
883a30a7 | 976 | bool setTCPNoDelay(int sock) |
149d0144 | 977 | { |
978 | int flag = 1; | |
883a30a7 RG |
979 | return setsockopt(sock, /* socket affected */ |
980 | IPPROTO_TCP, /* set option at TCP level */ | |
981 | TCP_NODELAY, /* name of option */ | |
982 | (char *) &flag, /* the cast is historical cruft */ | |
983 | sizeof(flag)) == 0; /* length of option value */ | |
149d0144 | 984 | } |
985 | ||
986 | ||
3897b9e1 | 987 | bool setNonBlocking(int sock) |
988 | { | |
3ddb9247 | 989 | int flags=fcntl(sock,F_GETFL,0); |
3897b9e1 | 990 | if(flags<0 || fcntl(sock, F_SETFL,flags|O_NONBLOCK) <0) |
991 | return false; | |
992 | return true; | |
993 | } | |
994 | ||
995 | bool setBlocking(int sock) | |
996 | { | |
3ddb9247 | 997 | int flags=fcntl(sock,F_GETFL,0); |
3897b9e1 | 998 | if(flags<0 || fcntl(sock, F_SETFL,flags&(~O_NONBLOCK)) <0) |
999 | return false; | |
1000 | return true; | |
1001 | } | |
1002 | ||
bf676f2f PL |
1003 | bool setReuseAddr(int sock) |
1004 | { | |
1005 | int tmp = 1; | |
1006 | if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char*)&tmp, static_cast<unsigned>(sizeof tmp))<0) | |
04360367 | 1007 | throw PDNSException(string("Setsockopt failed: ")+stringerror()); |
bf676f2f PL |
1008 | return true; |
1009 | } | |
1010 | ||
18861f97 RG |
1011 | bool isNonBlocking(int sock) |
1012 | { | |
1013 | int flags=fcntl(sock,F_GETFL,0); | |
1014 | return flags & O_NONBLOCK; | |
1015 | } | |
1016 | ||
29bb743c OM |
1017 | bool setReceiveSocketErrors(int sock, int af) |
1018 | { | |
1019 | #ifdef __linux__ | |
1020 | int tmp = 1, ret; | |
1021 | if (af == AF_INET) { | |
1022 | ret = setsockopt(sock, IPPROTO_IP, IP_RECVERR, &tmp, sizeof(tmp)); | |
1023 | } else { | |
1024 | ret = setsockopt(sock, IPPROTO_IPV6, IPV6_RECVERR, &tmp, sizeof(tmp)); | |
1025 | } | |
1026 | if (ret < 0) { | |
04360367 | 1027 | throw PDNSException(string("Setsockopt failed: ") + stringerror()); |
29bb743c OM |
1028 | } |
1029 | #endif | |
1030 | return true; | |
1031 | } | |
1032 | ||
3897b9e1 | 1033 | // Closes a socket. |
18e9f940 | 1034 | int closesocket(int socket) |
3897b9e1 | 1035 | { |
18e9f940 OM |
1036 | int ret = ::close(socket); |
1037 | if(ret < 0 && errno == ECONNRESET) { // see ticket 192, odd BSD behaviour | |
3897b9e1 | 1038 | return 0; |
18e9f940 OM |
1039 | } |
1040 | if (ret < 0) { | |
1041 | int err = errno; | |
1042 | throw PDNSException("Error closing socket: " + stringerror(err)); | |
1043 | } | |
3897b9e1 | 1044 | return ret; |
1045 | } | |
1046 | ||
1047 | bool setCloseOnExec(int sock) | |
1048 | { | |
3ddb9247 | 1049 | int flags=fcntl(sock,F_GETFD,0); |
3897b9e1 | 1050 | if(flags<0 || fcntl(sock, F_SETFD,flags|FD_CLOEXEC) <0) |
1051 | return false; | |
1052 | return true; | |
1053 | } | |
1054 | ||
6907f014 | 1055 | #ifdef __linux__ |
ab7cf5f0 RG |
1056 | #include <linux/rtnetlink.h> |
1057 | ||
1058 | int getMACAddress(const ComboAddress& ca, char* dest, size_t destLen) | |
1059 | { | |
1060 | struct { | |
1061 | struct nlmsghdr headermsg; | |
1062 | struct ndmsg neighbormsg; | |
1063 | } request; | |
1064 | ||
1065 | std::array<char, 8192> buffer; | |
1066 | ||
1067 | auto sock = FDWrapper(socket(AF_NETLINK, SOCK_RAW|SOCK_CLOEXEC, NETLINK_ROUTE)); | |
1068 | if (sock.getHandle() == -1) { | |
1069 | return errno; | |
6f238a33 | 1070 | } |
ab7cf5f0 RG |
1071 | |
1072 | memset(&request, 0, sizeof(request)); | |
1073 | request.headermsg.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1074 | request.headermsg.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP; | |
1075 | request.headermsg.nlmsg_type = RTM_GETNEIGH; | |
1076 | request.neighbormsg.ndm_family = ca.sin4.sin_family; | |
1077 | ||
1078 | while (true) { | |
1079 | ssize_t sent = send(sock.getHandle(), &request, sizeof(request), 0); | |
1080 | if (sent == -1) { | |
1081 | if (errno == EINTR) { | |
1082 | continue; | |
1083 | } | |
1084 | return errno; | |
1085 | } | |
1086 | else if (static_cast<size_t>(sent) != sizeof(request)) { | |
1087 | return EIO; | |
1088 | } | |
1089 | break; | |
6f238a33 | 1090 | } |
ab7cf5f0 RG |
1091 | |
1092 | bool done = false; | |
1093 | bool foundIP = false; | |
1094 | bool foundMAC = false; | |
1095 | do { | |
1096 | ssize_t got = recv(sock.getHandle(), buffer.data(), buffer.size(), 0); | |
1097 | ||
1098 | if (got < 0) { | |
1099 | if (errno == EINTR) { | |
1100 | continue; | |
1101 | } | |
1102 | return errno; | |
1103 | } | |
1104 | ||
1105 | size_t remaining = static_cast<size_t>(got); | |
1106 | for (struct nlmsghdr* nlmsgheader = reinterpret_cast<struct nlmsghdr*>(buffer.data()); | |
1107 | done == false && NLMSG_OK (nlmsgheader, remaining); | |
1108 | nlmsgheader = reinterpret_cast<struct nlmsghdr*>(NLMSG_NEXT(nlmsgheader, remaining))) { | |
1109 | ||
1110 | if (nlmsgheader->nlmsg_type == NLMSG_DONE) { | |
1111 | done = true; | |
1112 | break; | |
1113 | } | |
1114 | ||
1115 | auto nd = reinterpret_cast<struct ndmsg*>(NLMSG_DATA(nlmsgheader)); | |
f161f5ff | 1116 | auto rtatp = reinterpret_cast<struct rtattr*>(reinterpret_cast<char*>(nd) + NLMSG_ALIGN(sizeof(struct ndmsg))); |
ab7cf5f0 RG |
1117 | int rtattrlen = nlmsgheader->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); |
1118 | ||
1119 | if (nd->ndm_family != ca.sin4.sin_family) { | |
1120 | continue; | |
1121 | } | |
1122 | ||
6cb04f61 RG |
1123 | if (ca.sin4.sin_family == AF_INET6 && ca.sin6.sin6_scope_id != 0 && static_cast<int32_t>(ca.sin6.sin6_scope_id) != nd->ndm_ifindex) { |
1124 | continue; | |
1125 | } | |
1126 | ||
ab7cf5f0 RG |
1127 | for (; done == false && RTA_OK(rtatp, rtattrlen); rtatp = RTA_NEXT(rtatp, rtattrlen)) { |
1128 | if (rtatp->rta_type == NDA_DST){ | |
1129 | if (nd->ndm_family == AF_INET) { | |
1130 | auto inp = reinterpret_cast<struct in_addr*>(RTA_DATA(rtatp)); | |
1131 | if (inp->s_addr == ca.sin4.sin_addr.s_addr) { | |
1132 | foundIP = true; | |
1133 | } | |
1134 | } | |
1135 | else if (nd->ndm_family == AF_INET6) { | |
1136 | auto inp = reinterpret_cast<struct in6_addr *>(RTA_DATA(rtatp)); | |
1137 | if (memcmp(inp->s6_addr, ca.sin6.sin6_addr.s6_addr, sizeof(ca.sin6.sin6_addr.s6_addr)) == 0) { | |
1138 | foundIP = true; | |
1139 | } | |
1140 | } | |
1141 | } | |
1142 | else if (rtatp->rta_type == NDA_LLADDR) { | |
1143 | if (foundIP) { | |
7c591a96 RG |
1144 | size_t addrLen = rtatp->rta_len - sizeof(struct rtattr); |
1145 | if (addrLen > destLen) { | |
1146 | return ENOBUFS; | |
ab7cf5f0 | 1147 | } |
7c591a96 | 1148 | memcpy(dest, reinterpret_cast<const char*>(rtatp) + sizeof(struct rtattr), addrLen); |
ab7cf5f0 RG |
1149 | foundMAC = true; |
1150 | done = true; | |
1151 | break; | |
1152 | } | |
1153 | } | |
1817fef6 | 1154 | } |
6907f014 | 1155 | } |
1156 | } | |
ab7cf5f0 RG |
1157 | while (done == false); |
1158 | ||
1159 | return foundMAC ? 0 : ENOENT; | |
1160 | } | |
1161 | #else | |
1162 | int getMACAddress(const ComboAddress& ca, char* dest, size_t len) | |
1163 | { | |
6f238a33 CHB |
1164 | return ENOENT; |
1165 | } | |
ab7cf5f0 RG |
1166 | #endif /* __linux__ */ |
1167 | ||
6f238a33 CHB |
1168 | string getMACAddress(const ComboAddress& ca) |
1169 | { | |
1170 | string ret; | |
1171 | char tmp[6]; | |
1172 | if (getMACAddress(ca, tmp, sizeof(tmp)) == 0) { | |
1173 | ret.append(tmp, sizeof(tmp)); | |
1174 | } | |
6907f014 | 1175 | return ret; |
1176 | } | |
1177 | ||
8290ad9f | 1178 | uint64_t udpErrorStats(const std::string& str) |
1179 | { | |
1180 | #ifdef __linux__ | |
1181 | ifstream ifs("/proc/net/snmp"); | |
68c3e465 | 1182 | if (!ifs) { |
8290ad9f | 1183 | return 0; |
68c3e465 RG |
1184 | } |
1185 | ||
8290ad9f | 1186 | string line; |
68c3e465 RG |
1187 | while (getline(ifs, line)) { |
1188 | if (boost::starts_with(line, "Udp: ") && isdigit(line.at(5))) { | |
84d1d33a | 1189 | vector<string> parts; |
8290ad9f | 1190 | stringtok(parts, line, " \n\t\r"); |
68c3e465 RG |
1191 | |
1192 | if (parts.size() < 7) { | |
f9562824 | 1193 | break; |
68c3e465 RG |
1194 | } |
1195 | ||
1196 | if (str == "udp-rcvbuf-errors") { | |
f9562824 | 1197 | return std::stoull(parts.at(5)); |
68c3e465 RG |
1198 | } |
1199 | else if (str == "udp-sndbuf-errors") { | |
f9562824 | 1200 | return std::stoull(parts.at(6)); |
68c3e465 RG |
1201 | } |
1202 | else if (str == "udp-noport-errors") { | |
f9562824 | 1203 | return std::stoull(parts.at(2)); |
68c3e465 RG |
1204 | } |
1205 | else if (str == "udp-in-errors") { | |
f9562824 | 1206 | return std::stoull(parts.at(3)); |
68c3e465 RG |
1207 | } |
1208 | else if (parts.size() >= 8 && str == "udp-in-csum-errors") { | |
1209 | return std::stoull(parts.at(7)); | |
1210 | } | |
1211 | else { | |
f9562824 | 1212 | return 0; |
68c3e465 | 1213 | } |
8290ad9f | 1214 | } |
1215 | } | |
1216 | #endif | |
1217 | return 0; | |
1218 | } | |
da15912b | 1219 | |
84d1d33a RG |
1220 | uint64_t udp6ErrorStats(const std::string& str) |
1221 | { | |
1222 | #ifdef __linux__ | |
1223 | const std::map<std::string, std::string> keys = { | |
1224 | { "udp6-in-errors", "Udp6InErrors" }, | |
1225 | { "udp6-recvbuf-errors", "Udp6RcvbufErrors" }, | |
1226 | { "udp6-sndbuf-errors", "Udp6SndbufErrors" }, | |
1227 | { "udp6-noport-errors", "Udp6NoPorts" }, | |
1228 | { "udp6-in-csum-errors", "Udp6InCsumErrors" } | |
1229 | }; | |
1230 | ||
1231 | auto key = keys.find(str); | |
1232 | if (key == keys.end()) { | |
1233 | return 0; | |
1234 | } | |
1235 | ||
1236 | ifstream ifs("/proc/net/snmp6"); | |
1237 | if (!ifs) { | |
1238 | return 0; | |
1239 | } | |
1240 | ||
1241 | std::string line; | |
1242 | while (getline(ifs, line)) { | |
1243 | if (!boost::starts_with(line, key->second)) { | |
1244 | continue; | |
1245 | } | |
1246 | ||
1247 | std::vector<std::string> parts; | |
84d1d33a RG |
1248 | stringtok(parts, line, " \n\t\r"); |
1249 | ||
1250 | if (parts.size() != 2) { | |
1251 | return 0; | |
1252 | } | |
1253 | ||
1254 | return std::stoull(parts.at(1)); | |
1255 | } | |
1256 | #endif | |
1257 | return 0; | |
1258 | } | |
1259 | ||
d73de874 | 1260 | uint64_t tcpErrorStats(const std::string& /* str */) |
e150c22c RG |
1261 | { |
1262 | #ifdef __linux__ | |
1263 | ifstream ifs("/proc/net/netstat"); | |
1264 | if (!ifs) { | |
1265 | return 0; | |
1266 | } | |
1267 | ||
1268 | string line; | |
1269 | vector<string> parts; | |
1270 | while (getline(ifs,line)) { | |
1271 | if (line.size() > 9 && boost::starts_with(line, "TcpExt: ") && isdigit(line.at(8))) { | |
1272 | stringtok(parts, line, " \n\t\r"); | |
1273 | ||
1274 | if (parts.size() < 21) { | |
1275 | break; | |
1276 | } | |
1277 | ||
1278 | return std::stoull(parts.at(20)); | |
1279 | } | |
1280 | } | |
1281 | #endif | |
1282 | return 0; | |
1283 | } | |
1284 | ||
d73de874 | 1285 | uint64_t getCPUIOWait(const std::string& /* str */) |
591d1bd3 RG |
1286 | { |
1287 | #ifdef __linux__ | |
1288 | ifstream ifs("/proc/stat"); | |
1289 | if (!ifs) { | |
1290 | return 0; | |
1291 | } | |
1292 | ||
1293 | string line; | |
1294 | vector<string> parts; | |
1295 | while (getline(ifs, line)) { | |
1296 | if (boost::starts_with(line, "cpu ")) { | |
1297 | stringtok(parts, line, " \n\t\r"); | |
1298 | ||
1299 | if (parts.size() < 6) { | |
1300 | break; | |
1301 | } | |
1302 | ||
1303 | return std::stoull(parts[5]); | |
1304 | } | |
1305 | } | |
1306 | #endif | |
1307 | return 0; | |
1308 | } | |
1309 | ||
d73de874 | 1310 | uint64_t getCPUSteal(const std::string& /* str */) |
591d1bd3 RG |
1311 | { |
1312 | #ifdef __linux__ | |
1313 | ifstream ifs("/proc/stat"); | |
1314 | if (!ifs) { | |
1315 | return 0; | |
1316 | } | |
1317 | ||
1318 | string line; | |
1319 | vector<string> parts; | |
1320 | while (getline(ifs, line)) { | |
1321 | if (boost::starts_with(line, "cpu ")) { | |
1322 | stringtok(parts, line, " \n\t\r"); | |
1323 | ||
1324 | if (parts.size() < 9) { | |
1325 | break; | |
1326 | } | |
1327 | ||
1328 | return std::stoull(parts[8]); | |
1329 | } | |
1330 | } | |
1331 | #endif | |
1332 | return 0; | |
1333 | } | |
1334 | ||
21a3792f | 1335 | bool getTSIGHashEnum(const DNSName& algoName, TSIGHashEnum& algoEnum) |
da15912b | 1336 | { |
2330c421 | 1337 | if (algoName == DNSName("hmac-md5.sig-alg.reg.int") || algoName == DNSName("hmac-md5")) |
da15912b | 1338 | algoEnum = TSIG_MD5; |
2330c421 | 1339 | else if (algoName == DNSName("hmac-sha1")) |
da15912b | 1340 | algoEnum = TSIG_SHA1; |
2330c421 | 1341 | else if (algoName == DNSName("hmac-sha224")) |
da15912b | 1342 | algoEnum = TSIG_SHA224; |
2330c421 | 1343 | else if (algoName == DNSName("hmac-sha256")) |
da15912b | 1344 | algoEnum = TSIG_SHA256; |
2330c421 | 1345 | else if (algoName == DNSName("hmac-sha384")) |
da15912b | 1346 | algoEnum = TSIG_SHA384; |
2330c421 | 1347 | else if (algoName == DNSName("hmac-sha512")) |
da15912b | 1348 | algoEnum = TSIG_SHA512; |
2330c421 | 1349 | else if (algoName == DNSName("gss-tsig")) |
bcb5b94e | 1350 | algoEnum = TSIG_GSS; |
da15912b AT |
1351 | else { |
1352 | return false; | |
1353 | } | |
1354 | return true; | |
1355 | } | |
bfd4efae | 1356 | |
21a3792f | 1357 | DNSName getTSIGAlgoName(TSIGHashEnum& algoEnum) |
bfd4efae AT |
1358 | { |
1359 | switch(algoEnum) { | |
8171ab83 | 1360 | case TSIG_MD5: return DNSName("hmac-md5.sig-alg.reg.int."); |
1361 | case TSIG_SHA1: return DNSName("hmac-sha1."); | |
1362 | case TSIG_SHA224: return DNSName("hmac-sha224."); | |
1363 | case TSIG_SHA256: return DNSName("hmac-sha256."); | |
1364 | case TSIG_SHA384: return DNSName("hmac-sha384."); | |
1365 | case TSIG_SHA512: return DNSName("hmac-sha512."); | |
1366 | case TSIG_GSS: return DNSName("gss-tsig."); | |
bfd4efae AT |
1367 | } |
1368 | throw PDNSException("getTSIGAlgoName does not understand given algorithm, please fix!"); | |
1369 | } | |
a1a787dc | 1370 | |
a9b6db56 | 1371 | uint64_t getOpenFileDescriptors(const std::string&) |
1372 | { | |
1373 | #ifdef __linux__ | |
1374 | DIR* dirhdl=opendir(("/proc/"+std::to_string(getpid())+"/fd/").c_str()); | |
1e05b07c | 1375 | if(!dirhdl) |
a9b6db56 | 1376 | return 0; |
1377 | ||
1378 | struct dirent *entry; | |
1379 | int ret=0; | |
1380 | while((entry = readdir(dirhdl))) { | |
335da0ba AT |
1381 | uint32_t num; |
1382 | try { | |
a0383aad | 1383 | pdns::checked_stoi_into(num, entry->d_name); |
335da0ba AT |
1384 | } catch (...) { |
1385 | continue; // was not a number. | |
1386 | } | |
a9b6db56 | 1387 | if(std::to_string(num) == entry->d_name) |
1388 | ret++; | |
1389 | } | |
1390 | closedir(dirhdl); | |
1391 | return ret; | |
1392 | ||
a68eedb2 O |
1393 | #elif defined(__OpenBSD__) |
1394 | // FreeBSD also has this in libopenbsd, but I don't know if that's available always | |
1395 | return getdtablecount(); | |
a9b6db56 | 1396 | #else |
1397 | return 0; | |
1398 | #endif | |
1399 | } | |
1400 | ||
a1a787dc | 1401 | uint64_t getRealMemoryUsage(const std::string&) |
1402 | { | |
330dcb5c | 1403 | #ifdef __linux__ |
16101f83 | 1404 | ifstream ifs("/proc/self/statm"); |
330dcb5c OM |
1405 | if(!ifs) |
1406 | return 0; | |
1407 | ||
1408 | uint64_t size, resident, shared, text, lib, data; | |
1409 | ifs >> size >> resident >> shared >> text >> lib >> data; | |
1410 | ||
ff1f5c0f | 1411 | // We used to use "data" here, but it proves unreliable and even is marked "broken" |
1e05b07c | 1412 | // in https://www.kernel.org/doc/html/latest/filesystems/proc.html |
ff1f5c0f | 1413 | return resident * getpagesize(); |
330dcb5c OM |
1414 | #else |
1415 | struct rusage ru; | |
1416 | if (getrusage(RUSAGE_SELF, &ru) != 0) | |
1417 | return 0; | |
1418 | return ru.ru_maxrss * 1024; | |
1419 | #endif | |
1420 | } | |
1421 | ||
1422 | ||
1423 | uint64_t getSpecialMemoryUsage(const std::string&) | |
1424 | { | |
a1a787dc | 1425 | #ifdef __linux__ |
16101f83 | 1426 | ifstream ifs("/proc/self/smaps"); |
a1a787dc | 1427 | if(!ifs) |
1428 | return 0; | |
1429 | string line; | |
1430 | uint64_t bytes=0; | |
1431 | string header("Private_Dirty:"); | |
1432 | while(getline(ifs, line)) { | |
1433 | if(boost::starts_with(line, header)) { | |
335da0ba | 1434 | bytes += std::stoull(line.substr(header.length() + 1))*1024; |
a1a787dc | 1435 | } |
1436 | } | |
1437 | return bytes; | |
1438 | #else | |
1439 | return 0; | |
1440 | #endif | |
1441 | } | |
4f99f3d3 RG |
1442 | |
1443 | uint64_t getCPUTimeUser(const std::string&) | |
1444 | { | |
1445 | struct rusage ru; | |
1446 | getrusage(RUSAGE_SELF, &ru); | |
1447 | return (ru.ru_utime.tv_sec*1000ULL + ru.ru_utime.tv_usec/1000); | |
1448 | } | |
1449 | ||
1450 | uint64_t getCPUTimeSystem(const std::string&) | |
1451 | { | |
1452 | struct rusage ru; | |
1453 | getrusage(RUSAGE_SELF, &ru); | |
1454 | return (ru.ru_stime.tv_sec*1000ULL + ru.ru_stime.tv_usec/1000); | |
1455 | } | |
3fcaeeac | 1456 | |
1457 | double DiffTime(const struct timespec& first, const struct timespec& second) | |
1458 | { | |
d2adfa5c OM |
1459 | auto seconds = second.tv_sec - first.tv_sec; |
1460 | auto nseconds = second.tv_nsec - first.tv_nsec; | |
1e05b07c | 1461 | |
d2adfa5c OM |
1462 | if (nseconds < 0) { |
1463 | seconds -= 1; | |
1464 | nseconds += 1000000000; | |
3fcaeeac | 1465 | } |
d2adfa5c | 1466 | return static_cast<double>(seconds) + static_cast<double>(nseconds) / 1000000000.0; |
3fcaeeac | 1467 | } |
1468 | ||
1469 | double DiffTime(const struct timeval& first, const struct timeval& second) | |
1470 | { | |
1471 | int seconds=second.tv_sec - first.tv_sec; | |
1472 | int useconds=second.tv_usec - first.tv_usec; | |
1e05b07c | 1473 | |
3fcaeeac | 1474 | if(useconds < 0) { |
1475 | seconds-=1; | |
1476 | useconds+=1000000; | |
1477 | } | |
1478 | return seconds + useconds/1000000.0; | |
1479 | } | |
ffb07158 | 1480 | |
ffb07158 | 1481 | uid_t strToUID(const string &str) |
1482 | { | |
1483 | uid_t result = 0; | |
1484 | const char * cstr = str.c_str(); | |
1485 | struct passwd * pwd = getpwnam(cstr); | |
1486 | ||
4646277d | 1487 | if (pwd == nullptr) { |
e805cba5 | 1488 | long long val; |
ffb07158 | 1489 | |
e805cba5 RG |
1490 | try { |
1491 | val = stoll(str); | |
ffb07158 | 1492 | } |
e805cba5 RG |
1493 | catch(std::exception& e) { |
1494 | throw runtime_error((boost::format("Error: Unable to parse user ID %s") % cstr).str() ); | |
1495 | } | |
1496 | ||
1497 | if (val < std::numeric_limits<uid_t>::min() || val > std::numeric_limits<uid_t>::max()) { | |
1498 | throw runtime_error((boost::format("Error: Unable to parse user ID %s") % cstr).str() ); | |
ffb07158 | 1499 | } |
e805cba5 RG |
1500 | |
1501 | result = static_cast<uid_t>(val); | |
ffb07158 | 1502 | } |
1503 | else { | |
1504 | result = pwd->pw_uid; | |
1505 | } | |
1506 | ||
1507 | return result; | |
1508 | } | |
1509 | ||
1510 | gid_t strToGID(const string &str) | |
1511 | { | |
1512 | gid_t result = 0; | |
1513 | const char * cstr = str.c_str(); | |
1514 | struct group * grp = getgrnam(cstr); | |
1515 | ||
4646277d | 1516 | if (grp == nullptr) { |
e805cba5 | 1517 | long long val; |
ffb07158 | 1518 | |
e805cba5 RG |
1519 | try { |
1520 | val = stoll(str); | |
ffb07158 | 1521 | } |
e805cba5 RG |
1522 | catch(std::exception& e) { |
1523 | throw runtime_error((boost::format("Error: Unable to parse group ID %s") % cstr).str() ); | |
1524 | } | |
1525 | ||
1526 | if (val < std::numeric_limits<gid_t>::min() || val > std::numeric_limits<gid_t>::max()) { | |
1527 | throw runtime_error((boost::format("Error: Unable to parse group ID %s") % cstr).str() ); | |
ffb07158 | 1528 | } |
e805cba5 RG |
1529 | |
1530 | result = static_cast<gid_t>(val); | |
ffb07158 | 1531 | } |
1532 | else { | |
1533 | result = grp->gr_gid; | |
1534 | } | |
1535 | ||
1536 | return result; | |
1537 | } | |
1538 | ||
8fd25133 RG |
1539 | bool isSettingThreadCPUAffinitySupported() |
1540 | { | |
1541 | #ifdef HAVE_PTHREAD_SETAFFINITY_NP | |
1542 | return true; | |
1543 | #else | |
1544 | return false; | |
1545 | #endif | |
1546 | } | |
1547 | ||
1548 | int mapThreadToCPUList(pthread_t tid, const std::set<int>& cpus) | |
1549 | { | |
1550 | #ifdef HAVE_PTHREAD_SETAFFINITY_NP | |
4d39d7f3 TIH |
1551 | # ifdef __NetBSD__ |
1552 | cpuset_t *cpuset; | |
1553 | cpuset = cpuset_create(); | |
1554 | for (const auto cpuID : cpus) { | |
1555 | cpuset_set(cpuID, cpuset); | |
1556 | } | |
1557 | ||
1558 | return pthread_setaffinity_np(tid, | |
1559 | cpuset_size(cpuset), | |
1560 | cpuset); | |
1561 | # else | |
1562 | # ifdef __FreeBSD__ | |
1563 | # define cpu_set_t cpuset_t | |
1564 | # endif | |
8fd25133 RG |
1565 | cpu_set_t cpuset; |
1566 | CPU_ZERO(&cpuset); | |
1567 | for (const auto cpuID : cpus) { | |
1568 | CPU_SET(cpuID, &cpuset); | |
1569 | } | |
1570 | ||
1571 | return pthread_setaffinity_np(tid, | |
1572 | sizeof(cpuset), | |
1573 | &cpuset); | |
4d39d7f3 | 1574 | # endif |
99be0a43 | 1575 | #else |
8fd25133 | 1576 | return ENOSYS; |
99be0a43 | 1577 | #endif /* HAVE_PTHREAD_SETAFFINITY_NP */ |
8fd25133 | 1578 | } |
5d4e1ef8 RG |
1579 | |
1580 | std::vector<ComboAddress> getResolvers(const std::string& resolvConfPath) | |
1581 | { | |
1582 | std::vector<ComboAddress> results; | |
1583 | ||
1584 | ifstream ifs(resolvConfPath); | |
1585 | if (!ifs) { | |
1586 | return results; | |
1587 | } | |
1588 | ||
1589 | string line; | |
1590 | while(std::getline(ifs, line)) { | |
dc593046 | 1591 | boost::trim_right_if(line, boost::is_any_of(" \r\n\x1a")); |
5d4e1ef8 RG |
1592 | boost::trim_left(line); // leading spaces, let's be nice |
1593 | ||
1594 | string::size_type tpos = line.find_first_of(";#"); | |
1595 | if (tpos != string::npos) { | |
1596 | line.resize(tpos); | |
1597 | } | |
1598 | ||
1599 | if (boost::starts_with(line, "nameserver ") || boost::starts_with(line, "nameserver\t")) { | |
1600 | vector<string> parts; | |
1601 | stringtok(parts, line, " \t,"); // be REALLY nice | |
d2adfa5c | 1602 | for (auto iter = parts.begin() + 1; iter != parts.end(); ++iter) { |
5d4e1ef8 RG |
1603 | try { |
1604 | results.emplace_back(*iter, 53); | |
1605 | } | |
1606 | catch(...) | |
1607 | { | |
1608 | } | |
1609 | } | |
1610 | } | |
1611 | } | |
1612 | ||
1613 | return results; | |
1614 | } | |
ee271fc4 RG |
1615 | |
1616 | size_t getPipeBufferSize(int fd) | |
1617 | { | |
1618 | #ifdef F_GETPIPE_SZ | |
1619 | int res = fcntl(fd, F_GETPIPE_SZ); | |
1620 | if (res == -1) { | |
1621 | return 0; | |
1622 | } | |
1623 | return res; | |
1624 | #else | |
1625 | errno = ENOSYS; | |
1626 | return 0; | |
1627 | #endif /* F_GETPIPE_SZ */ | |
1628 | } | |
1629 | ||
1630 | bool setPipeBufferSize(int fd, size_t size) | |
1631 | { | |
1632 | #ifdef F_SETPIPE_SZ | |
60a133cc | 1633 | if (size > static_cast<size_t>(std::numeric_limits<int>::max())) { |
ee271fc4 RG |
1634 | errno = EINVAL; |
1635 | return false; | |
1636 | } | |
1637 | int newSize = static_cast<int>(size); | |
1638 | int res = fcntl(fd, F_SETPIPE_SZ, newSize); | |
1639 | if (res == -1) { | |
1640 | return false; | |
1641 | } | |
1642 | return true; | |
1643 | #else | |
1644 | errno = ENOSYS; | |
1645 | return false; | |
1646 | #endif /* F_SETPIPE_SZ */ | |
1647 | } | |
ef3ee606 RG |
1648 | |
1649 | DNSName reverseNameFromIP(const ComboAddress& ip) | |
1650 | { | |
1651 | if (ip.isIPv4()) { | |
1652 | std::string result("in-addr.arpa."); | |
1653 | auto ptr = reinterpret_cast<const uint8_t*>(&ip.sin4.sin_addr.s_addr); | |
1654 | for (size_t idx = 0; idx < sizeof(ip.sin4.sin_addr.s_addr); idx++) { | |
1655 | result = std::to_string(ptr[idx]) + "." + result; | |
1656 | } | |
1657 | return DNSName(result); | |
1658 | } | |
1659 | else if (ip.isIPv6()) { | |
1660 | std::string result("ip6.arpa."); | |
1661 | auto ptr = reinterpret_cast<const uint8_t*>(&ip.sin6.sin6_addr.s6_addr[0]); | |
1662 | for (size_t idx = 0; idx < sizeof(ip.sin6.sin6_addr.s6_addr); idx++) { | |
1663 | std::stringstream stream; | |
1664 | stream << std::hex << (ptr[idx] & 0x0F); | |
1665 | stream << '.'; | |
1666 | stream << std::hex << (((ptr[idx]) >> 4) & 0x0F); | |
1667 | stream << '.'; | |
1668 | result = stream.str() + result; | |
1669 | } | |
1670 | return DNSName(result); | |
1671 | } | |
1672 | ||
1673 | throw std::runtime_error("Calling reverseNameFromIP() for an address which is neither an IPv4 nor an IPv6"); | |
1674 | } | |
64d38231 | 1675 | |
032382bc PD |
1676 | std::string makeLuaString(const std::string& in) |
1677 | { | |
1678 | ostringstream str; | |
1679 | ||
1680 | str<<'"'; | |
1681 | ||
1682 | char item[5]; | |
1683 | for (unsigned char n : in) { | |
1684 | if (islower(n) || isupper(n)) { | |
1685 | item[0] = n; | |
1686 | item[1] = 0; | |
1687 | } | |
1688 | else { | |
1689 | snprintf(item, sizeof(item), "\\%03d", n); | |
1690 | } | |
1691 | str << item; | |
1692 | } | |
1693 | ||
1694 | str<<'"'; | |
1695 | ||
1696 | return str.str(); | |
1697 | } | |
e701f9d4 PL |
1698 | |
1699 | size_t parseSVCBValueList(const std::string &in, vector<std::string> &val) { | |
1700 | std::string parsed; | |
1701 | auto ret = parseRFC1035CharString(in, parsed); | |
1702 | parseSVCBValueListFromParsedRFC1035CharString(parsed, val); | |
1703 | return ret; | |
1704 | }; | |
b2504b29 RG |
1705 | |
1706 | #ifdef HAVE_CRYPTO_MEMCMP | |
1707 | #include <openssl/crypto.h> | |
dde80251 RG |
1708 | #else /* HAVE_CRYPTO_MEMCMP */ |
1709 | #ifdef HAVE_SODIUM_MEMCMP | |
1710 | #include <sodium.h> | |
1711 | #endif /* HAVE_SODIUM_MEMCMP */ | |
1712 | #endif /* HAVE_CRYPTO_MEMCMP */ | |
b2504b29 RG |
1713 | |
1714 | bool constantTimeStringEquals(const std::string& a, const std::string& b) | |
1715 | { | |
1716 | if (a.size() != b.size()) { | |
1717 | return false; | |
1718 | } | |
1719 | const size_t size = a.size(); | |
1720 | #ifdef HAVE_CRYPTO_MEMCMP | |
1721 | return CRYPTO_memcmp(a.c_str(), b.c_str(), size) == 0; | |
dde80251 RG |
1722 | #else /* HAVE_CRYPTO_MEMCMP */ |
1723 | #ifdef HAVE_SODIUM_MEMCMP | |
1724 | return sodium_memcmp(a.c_str(), b.c_str(), size) == 0; | |
1725 | #else /* HAVE_SODIUM_MEMCMP */ | |
b2504b29 RG |
1726 | const volatile unsigned char *_a = (const volatile unsigned char *) a.c_str(); |
1727 | const volatile unsigned char *_b = (const volatile unsigned char *) b.c_str(); | |
1728 | unsigned char res = 0; | |
1729 | ||
1730 | for (size_t idx = 0; idx < size; idx++) { | |
1731 | res |= _a[idx] ^ _b[idx]; | |
1732 | } | |
1733 | ||
1734 | return res == 0; | |
dde80251 RG |
1735 | #endif /* !HAVE_SODIUM_MEMCMP */ |
1736 | #endif /* !HAVE_CRYPTO_MEMCMP */ | |
b2504b29 | 1737 | } |