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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" |
3dc4644f | 59 | #include "dns_random.hh" |
ffb07158 | 60 | #include <pwd.h> |
61 | #include <grp.h> | |
1f63a8c3 | 62 | #include <climits> |
6c78a20e R |
63 | #ifdef __FreeBSD__ |
64 | # include <pthread_np.h> | |
65 | #endif | |
4d39d7f3 TIH |
66 | #ifdef __NetBSD__ |
67 | # include <pthread.h> | |
68 | # include <sched.h> | |
69 | #endif | |
a61e8e59 | 70 | |
66910c5d FM |
71 | #if defined(HAVE_LIBCRYPTO) |
72 | #include <openssl/err.h> | |
73 | #endif // HAVE_LIBCRYPTO | |
74 | ||
d2adfa5c | 75 | size_t writen2(int fileDesc, const void *buf, size_t count) |
040712e0 | 76 | { |
d2adfa5c | 77 | const char *ptr = static_cast<const char*>(buf); |
040712e0 | 78 | const char *eptr = ptr + count; |
3ddb9247 | 79 | |
d2adfa5c OM |
80 | while (ptr != eptr) { |
81 | auto res = ::write(fileDesc, ptr, eptr - ptr); | |
82 | if (res < 0) { | |
83 | if (errno == EAGAIN) { | |
4957a608 | 84 | throw std::runtime_error("used writen2 on non-blocking socket, got EAGAIN"); |
d2adfa5c OM |
85 | } |
86 | unixDie("failed in writen2"); | |
040712e0 | 87 | } |
d2adfa5c | 88 | else if (res == 0) { |
040712e0 | 89 | throw std::runtime_error("could not write all bytes, got eof in writen2"); |
d2adfa5c | 90 | } |
3ddb9247 | 91 | |
d2adfa5c | 92 | ptr += res; |
040712e0 | 93 | } |
3ddb9247 | 94 | |
040712e0 BH |
95 | return count; |
96 | } | |
97 | ||
a683e8bd | 98 | size_t readn2(int fd, void* buffer, size_t len) |
36fbf590 | 99 | { |
a683e8bd RG |
100 | size_t pos=0; |
101 | ssize_t res; | |
36fbf590 | 102 | for(;;) { |
103 | res = read(fd, (char*)buffer + pos, len - pos); | |
3ddb9247 | 104 | if(res == 0) |
3f6d07a4 | 105 | throw runtime_error("EOF while reading message"); |
36fbf590 | 106 | if(res < 0) { |
107 | if (errno == EAGAIN) | |
3f6d07a4 | 108 | throw std::runtime_error("used readn2 on non-blocking socket, got EAGAIN"); |
36fbf590 | 109 | else |
3f6d07a4 | 110 | unixDie("failed in readn2"); |
3ddb9247 PD |
111 | } |
112 | ||
a683e8bd | 113 | pos+=(size_t)res; |
36fbf590 | 114 | if(pos == len) |
115 | break; | |
116 | } | |
117 | return len; | |
118 | } | |
119 | ||
1342b949 | 120 | size_t readn2WithTimeout(int fd, void* buffer, size_t len, const struct timeval& idleTimeout, const struct timeval& totalTimeout, bool allowIncomplete) |
3f6d07a4 RG |
121 | { |
122 | size_t pos = 0; | |
50111728 O |
123 | struct timeval start{0,0}; |
124 | struct timeval remainingTime = totalTimeout; | |
125 | if (totalTimeout.tv_sec != 0 || totalTimeout.tv_usec != 0) { | |
126 | gettimeofday(&start, nullptr); | |
9396d955 RG |
127 | } |
128 | ||
3f6d07a4 RG |
129 | do { |
130 | ssize_t got = read(fd, (char *)buffer + pos, len - pos); | |
131 | if (got > 0) { | |
132 | pos += (size_t) got; | |
1342b949 RG |
133 | if (allowIncomplete) { |
134 | break; | |
135 | } | |
3f6d07a4 RG |
136 | } |
137 | else if (got == 0) { | |
138 | throw runtime_error("EOF while reading message"); | |
139 | } | |
140 | else { | |
141 | if (errno == EAGAIN) { | |
50111728 O |
142 | struct timeval w = ((totalTimeout.tv_sec == 0 && totalTimeout.tv_usec == 0) || idleTimeout <= remainingTime) ? idleTimeout : remainingTime; |
143 | int res = waitForData(fd, w.tv_sec, w.tv_usec); | |
3f6d07a4 RG |
144 | if (res > 0) { |
145 | /* there is data available */ | |
146 | } | |
147 | else if (res == 0) { | |
148 | throw runtime_error("Timeout while waiting for data to read"); | |
149 | } else { | |
150 | throw runtime_error("Error while waiting for data to read"); | |
151 | } | |
152 | } | |
153 | else { | |
154 | unixDie("failed in readn2WithTimeout"); | |
155 | } | |
156 | } | |
9396d955 | 157 | |
50111728 O |
158 | if (totalTimeout.tv_sec != 0 || totalTimeout.tv_usec != 0) { |
159 | struct timeval now; | |
160 | gettimeofday(&now, nullptr); | |
161 | struct timeval elapsed = now - start; | |
162 | if (remainingTime < elapsed) { | |
9396d955 RG |
163 | throw runtime_error("Timeout while reading data"); |
164 | } | |
165 | start = now; | |
50111728 | 166 | remainingTime = remainingTime - elapsed; |
9396d955 | 167 | } |
3f6d07a4 RG |
168 | } |
169 | while (pos < len); | |
170 | ||
171 | return len; | |
172 | } | |
173 | ||
50111728 | 174 | size_t writen2WithTimeout(int fd, const void * buffer, size_t len, const struct timeval& timeout) |
3f6d07a4 RG |
175 | { |
176 | size_t pos = 0; | |
177 | do { | |
f1b2ae9b | 178 | ssize_t written = write(fd, reinterpret_cast<const char *>(buffer) + pos, len - pos); |
3f6d07a4 RG |
179 | |
180 | if (written > 0) { | |
181 | pos += (size_t) written; | |
182 | } | |
183 | else if (written == 0) | |
184 | throw runtime_error("EOF while writing message"); | |
185 | else { | |
186 | if (errno == EAGAIN) { | |
50111728 | 187 | int res = waitForRWData(fd, false, timeout.tv_sec, timeout.tv_usec); |
3f6d07a4 RG |
188 | if (res > 0) { |
189 | /* there is room available */ | |
190 | } | |
191 | else if (res == 0) { | |
192 | throw runtime_error("Timeout while waiting to write data"); | |
193 | } else { | |
194 | throw runtime_error("Error while waiting for room to write data"); | |
195 | } | |
196 | } | |
197 | else { | |
198 | unixDie("failed in write2WithTimeout"); | |
199 | } | |
200 | } | |
201 | } | |
202 | while (pos < len); | |
203 | ||
204 | return len; | |
205 | } | |
12c86877 | 206 | |
da78b86e FM |
207 | auto pdns::getMessageFromErrno(const int errnum) -> std::string |
208 | { | |
209 | const size_t errLen = 2048; | |
210 | std::string errMsgData{}; | |
211 | errMsgData.resize(errLen); | |
212 | ||
213 | const char* errMsg = nullptr; | |
60c8f3f5 | 214 | #ifdef STRERROR_R_CHAR_P |
da78b86e FM |
215 | errMsg = strerror_r(errnum, errMsgData.data(), errMsgData.length()); |
216 | #else | |
217 | // This can fail, and when it does, it sets errno. We ignore that and | |
218 | // set our own error message instead. | |
219 | int res = strerror_r(errnum, errMsgData.data(), errMsgData.length()); | |
220 | errMsg = errMsgData.c_str(); | |
221 | if (res != 0) { | |
222 | errMsg = "Unknown (the exact error could not be retrieved)"; | |
223 | } | |
224 | #endif | |
225 | ||
226 | // We make a copy here because `strerror_r()` might return a static | |
227 | // immutable buffer for an error message. The copy shouldn't be | |
228 | // critical though, we're on the bailout/error-handling path anyways. | |
229 | std::string message{errMsg}; | |
230 | return message; | |
231 | } | |
232 | ||
66910c5d FM |
233 | #if defined(HAVE_LIBCRYPTO) |
234 | auto pdns::OpenSSL::error(const std::string& errorMessage) -> std::runtime_error | |
235 | { | |
236 | unsigned long errorCode = 0; | |
237 | auto fullErrorMessage{errorMessage}; | |
238 | #if OPENSSL_VERSION_MAJOR >= 3 | |
239 | const char* filename = nullptr; | |
240 | const char* functionName = nullptr; | |
241 | int lineNumber = 0; | |
242 | while ((errorCode = ERR_get_error_all(&filename, &lineNumber, &functionName, nullptr, nullptr)) != 0) { | |
243 | fullErrorMessage += std::string(": ") + std::to_string(errorCode); | |
244 | ||
245 | const auto* lib = ERR_lib_error_string(errorCode); | |
246 | if (lib != nullptr) { | |
247 | fullErrorMessage += std::string(":") + lib; | |
248 | } | |
249 | ||
250 | const auto* reason = ERR_reason_error_string(errorCode); | |
251 | if (reason != nullptr) { | |
252 | fullErrorMessage += std::string("::") + reason; | |
253 | } | |
254 | ||
255 | if (filename != nullptr) { | |
256 | fullErrorMessage += std::string(" - ") + filename; | |
257 | } | |
258 | if (lineNumber != 0) { | |
259 | fullErrorMessage += std::string(":") + std::to_string(lineNumber); | |
260 | } | |
261 | if (functionName != nullptr) { | |
262 | fullErrorMessage += std::string(" - ") + functionName; | |
263 | } | |
264 | } | |
265 | #else | |
266 | while ((errorCode = ERR_get_error()) != 0) { | |
267 | fullErrorMessage += std::string(": ") + std::to_string(errorCode); | |
268 | ||
269 | const auto* lib = ERR_lib_error_string(errorCode); | |
270 | if (lib != nullptr) { | |
271 | fullErrorMessage += std::string(":") + lib; | |
272 | } | |
273 | ||
274 | const auto* func = ERR_func_error_string(errorCode); | |
275 | if (func != nullptr) { | |
276 | fullErrorMessage += std::string(":") + func; | |
277 | } | |
278 | ||
279 | const auto* reason = ERR_reason_error_string(errorCode); | |
280 | if (reason != nullptr) { | |
281 | fullErrorMessage += std::string("::") + reason; | |
282 | } | |
283 | } | |
284 | #endif | |
285 | return std::runtime_error(fullErrorMessage); | |
286 | } | |
287 | ||
288 | auto pdns::OpenSSL::error(const std::string& componentName, const std::string& errorMessage) -> std::runtime_error | |
289 | { | |
290 | return pdns::OpenSSL::error(componentName + ": " + errorMessage); | |
291 | } | |
292 | #endif // HAVE_LIBCRYPTO | |
293 | ||
cc3afe25 BH |
294 | string nowTime() |
295 | { | |
74ab661c | 296 | time_t now = time(nullptr); |
d2adfa5c OM |
297 | struct tm theTime{}; |
298 | localtime_r(&now, &theTime); | |
299 | std::array<char, 30> buffer{}; | |
74ab661c | 300 | // YYYY-mm-dd HH:MM:SS TZOFF |
d2adfa5c | 301 | size_t ret = strftime(buffer.data(), buffer.size(), "%F %T %z", &theTime); |
d291045e OM |
302 | if (ret == 0) { |
303 | buffer[0] = '\0'; | |
304 | } | |
d2adfa5c | 305 | return {buffer.data()}; |
b636533b BH |
306 | } |
307 | ||
d2adfa5c | 308 | static bool ciEqual(const string& lhs, const string& rhs) |
49bd5a20 | 309 | { |
d2adfa5c | 310 | if (lhs.size() != rhs.size()) { |
49bd5a20 | 311 | return false; |
d2adfa5c | 312 | } |
49bd5a20 | 313 | |
d2adfa5c OM |
314 | string::size_type pos = 0; |
315 | const string::size_type epos = lhs.size(); | |
316 | for (; pos < epos; ++pos) { | |
317 | if (dns_tolower(lhs[pos]) != dns_tolower(rhs[pos])) { | |
49bd5a20 | 318 | return false; |
d2adfa5c OM |
319 | } |
320 | } | |
49bd5a20 BH |
321 | return true; |
322 | } | |
323 | ||
728485ca | 324 | /** does domain end on suffix? Is smart about "wwwds9a.nl" "ds9a.nl" not matching */ |
a683e8bd | 325 | static bool endsOn(const string &domain, const string &suffix) |
728485ca | 326 | { |
d2adfa5c | 327 | if( suffix.empty() || ciEqual(domain, suffix) ) { |
728485ca | 328 | return true; |
d2adfa5c | 329 | } |
7738a23f | 330 | |
d2adfa5c | 331 | if(domain.size() <= suffix.size()) { |
728485ca | 332 | return false; |
d2adfa5c | 333 | } |
3ddb9247 | 334 | |
d2adfa5c OM |
335 | string::size_type dpos = domain.size() - suffix.size() - 1; |
336 | string::size_type spos = 0; | |
7738a23f | 337 | |
d2adfa5c | 338 | if (domain[dpos++] != '.') { |
49bd5a20 | 339 | return false; |
d2adfa5c | 340 | } |
728485ca | 341 | |
d2adfa5c OM |
342 | for(; dpos < domain.size(); ++dpos, ++spos) { |
343 | if (dns_tolower(domain[dpos]) != dns_tolower(suffix[spos])) { | |
49bd5a20 | 344 | return false; |
d2adfa5c OM |
345 | } |
346 | } | |
49bd5a20 BH |
347 | |
348 | return true; | |
349 | } | |
f2c11a48 | 350 | |
a683e8bd RG |
351 | /** strips a domain suffix from a domain, returns true if it stripped */ |
352 | bool stripDomainSuffix(string *qname, const string &domain) | |
353 | { | |
d2adfa5c | 354 | if (!endsOn(*qname, domain)) { |
a683e8bd | 355 | return false; |
d2adfa5c | 356 | } |
a683e8bd | 357 | |
d2adfa5c | 358 | if (toLower(*qname) == toLower(domain)) { |
a683e8bd | 359 | *qname="@"; |
d2adfa5c | 360 | } |
a683e8bd | 361 | else { |
d2adfa5c | 362 | if ((*qname)[qname->size() - domain.size() - 1] != '.') { |
a683e8bd | 363 | return false; |
d2adfa5c | 364 | } |
a683e8bd | 365 | |
d2adfa5c | 366 | qname->resize(qname->size() - domain.size()-1); |
a683e8bd RG |
367 | } |
368 | return true; | |
369 | } | |
370 | ||
1fb3f0fc | 371 | // 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 | 372 | int waitForData(int fileDesc, int seconds, int useconds) |
649a88df | 373 | { |
d2adfa5c | 374 | return waitForRWData(fileDesc, true, seconds, useconds); |
649a88df BH |
375 | } |
376 | ||
d2adfa5c | 377 | int waitForRWData(int fileDesc, bool waitForRead, int seconds, int useconds, bool* error, bool* disconnected) |
12c86877 | 378 | { |
d2adfa5c | 379 | struct pollfd pfd{}; |
fab091b9 | 380 | memset(&pfd, 0, sizeof(pfd)); |
d2adfa5c | 381 | pfd.fd = fileDesc; |
3ddb9247 | 382 | |
d2adfa5c OM |
383 | if (waitForRead) { |
384 | pfd.events = POLLIN; | |
385 | } | |
386 | else { | |
387 | pfd.events = POLLOUT; | |
388 | } | |
1258abe0 | 389 | |
d2adfa5c | 390 | int ret = poll(&pfd, 1, seconds * 1000 + useconds/1000); |
e07c3801 | 391 | if (ret > 0) { |
d2adfa5c | 392 | if ((error != nullptr) && (pfd.revents & POLLERR) != 0) { |
51959320 RG |
393 | *error = true; |
394 | } | |
d2adfa5c | 395 | if ((disconnected != nullptr) && (pfd.revents & POLLHUP) != 0) { |
51959320 RG |
396 | *disconnected = true; |
397 | } | |
398 | } | |
1258abe0 | 399 | |
12c86877 BH |
400 | return ret; |
401 | } | |
402 | ||
a71bee29 | 403 | // 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 | 404 | int waitForMultiData(const set<int>& fds, const int seconds, const int useconds, int* fdOut) { |
d529011f PL |
405 | set<int> realFDs; |
406 | for (const auto& fd : fds) { | |
407 | if (fd >= 0 && realFDs.count(fd) == 0) { | |
408 | realFDs.insert(fd); | |
409 | } | |
410 | } | |
411 | ||
dcc0e65d | 412 | std::vector<struct pollfd> pfds(realFDs.size()); |
c2a16005 | 413 | memset(pfds.data(), 0, realFDs.size()*sizeof(struct pollfd)); |
d529011f PL |
414 | int ctr = 0; |
415 | for (const auto& fd : realFDs) { | |
416 | pfds[ctr].fd = fd; | |
417 | pfds[ctr].events = POLLIN; | |
418 | ctr++; | |
419 | } | |
420 | ||
421 | int ret; | |
422 | if(seconds >= 0) | |
c2a16005 | 423 | ret = poll(pfds.data(), realFDs.size(), seconds * 1000 + useconds/1000); |
d529011f | 424 | else |
c2a16005 | 425 | ret = poll(pfds.data(), realFDs.size(), -1); |
d529011f PL |
426 | if(ret <= 0) |
427 | return ret; | |
428 | ||
429 | set<int> pollinFDs; | |
aca9c605 PL |
430 | for (const auto& pfd : pfds) { |
431 | if (pfd.revents & POLLIN) { | |
432 | pollinFDs.insert(pfd.fd); | |
d529011f | 433 | } |
d529011f PL |
434 | } |
435 | set<int>::const_iterator it(pollinFDs.begin()); | |
3dc4644f | 436 | advance(it, dns_random(pollinFDs.size())); |
dc058f65 | 437 | *fdOut = *it; |
d529011f PL |
438 | return 1; |
439 | } | |
440 | ||
a71bee29 | 441 | // returns -1 in case of error, 0 if no data is available, 1 if there is. In the first two cases, errno is set |
f668f576 | 442 | int waitFor2Data(int fd1, int fd2, int seconds, int useconds, int* fdPtr) |
f4ff5929 | 443 | { |
f668f576 OM |
444 | std::array<pollfd,2> pfds{}; |
445 | memset(pfds.data(), 0, pfds.size() * sizeof(struct pollfd)); | |
f4ff5929 BH |
446 | pfds[0].fd = fd1; |
447 | pfds[1].fd = fd2; | |
3ddb9247 | 448 | |
f4ff5929 BH |
449 | pfds[0].events= pfds[1].events = POLLIN; |
450 | ||
f668f576 | 451 | int nsocks = 1 + static_cast<int>(fd2 >= 0); // fd2 can optionally be -1 |
f4ff5929 | 452 | |
f668f576 OM |
453 | int ret{}; |
454 | if (seconds >= 0) { | |
455 | ret = poll(pfds.data(), nsocks, seconds * 1000 + useconds / 1000); | |
456 | } | |
457 | else { | |
458 | ret = poll(pfds.data(), nsocks, -1); | |
459 | } | |
460 | if (ret <= 0) { | |
f4ff5929 | 461 | return ret; |
f668f576 | 462 | } |
3ddb9247 | 463 | |
f668f576 OM |
464 | if ((pfds[0].revents & POLLIN) != 0 && (pfds[1].revents & POLLIN) == 0) { |
465 | *fdPtr = pfds[0].fd; | |
466 | } | |
467 | else if ((pfds[1].revents & POLLIN) != 0 && (pfds[0].revents & POLLIN) == 0) { | |
468 | *fdPtr = pfds[1].fd; | |
469 | } | |
f4ff5929 | 470 | else if(ret == 2) { |
f668f576 OM |
471 | *fdPtr = pfds.at(dns_random_uint32() % 2).fd; |
472 | } | |
473 | else { | |
474 | *fdPtr = -1; // should never happen | |
f4ff5929 | 475 | } |
3ddb9247 | 476 | |
f4ff5929 BH |
477 | return 1; |
478 | } | |
479 | ||
12c86877 BH |
480 | |
481 | string humanDuration(time_t passed) | |
482 | { | |
483 | ostringstream ret; | |
484 | if(passed<60) | |
485 | ret<<passed<<" seconds"; | |
486 | else if(passed<3600) | |
9e04108d | 487 | ret<<std::setprecision(2)<<passed/60.0<<" minutes"; |
12c86877 | 488 | else if(passed<86400) |
9e04108d | 489 | ret<<std::setprecision(3)<<passed/3600.0<<" hours"; |
12c86877 | 490 | else if(passed<(86400*30.41)) |
9e04108d | 491 | ret<<std::setprecision(3)<<passed/86400.0<<" days"; |
12c86877 | 492 | else |
9e04108d | 493 | ret<<std::setprecision(3)<<passed/(86400*30.41)<<" months"; |
12c86877 BH |
494 | |
495 | return ret.str(); | |
496 | } | |
497 | ||
d2adfa5c | 498 | string unquotify(const string &item) |
1d329048 BH |
499 | { |
500 | if(item.size()<2) | |
501 | return item; | |
502 | ||
503 | string::size_type bpos=0, epos=item.size(); | |
12c86877 | 504 | |
3ddb9247 | 505 | if(item[0]=='"') |
1d329048 | 506 | bpos=1; |
c4bee46c | 507 | |
1d329048 BH |
508 | if(item[epos-1]=='"') |
509 | epos-=1; | |
510 | ||
c4bee46c | 511 | return item.substr(bpos,epos-bpos); |
1d329048 | 512 | } |
12c86877 BH |
513 | |
514 | void stripLine(string &line) | |
515 | { | |
bdf40704 | 516 | string::size_type pos=line.find_first_of("\r\n"); |
12c86877 BH |
517 | if(pos!=string::npos) { |
518 | line.resize(pos); | |
519 | } | |
520 | } | |
521 | ||
522 | string urlEncode(const string &text) | |
523 | { | |
524 | string ret; | |
d7f67000 RP |
525 | for(char i : text) |
526 | if(i==' ')ret.append("%20"); | |
527 | else ret.append(1,i); | |
12c86877 BH |
528 | return ret; |
529 | } | |
530 | ||
ff32c991 | 531 | static size_t getMaxHostNameSize() |
12c86877 | 532 | { |
ff32c991 FM |
533 | #if defined(HOST_NAME_MAX) |
534 | return HOST_NAME_MAX; | |
0db70140 | 535 | #endif |
ac2bb9e7 | 536 | |
ff32c991 FM |
537 | #if defined(_SC_HOST_NAME_MAX) |
538 | auto tmp = sysconf(_SC_HOST_NAME_MAX); | |
539 | if (tmp != -1) { | |
540 | return tmp; | |
541 | } | |
542 | #endif | |
12c86877 | 543 | |
ff32c991 FM |
544 | const size_t maxHostNameSize = 255; |
545 | return maxHostNameSize; | |
546 | } | |
547 | ||
548 | std::optional<string> getHostname() | |
549 | { | |
550 | const size_t maxHostNameBufSize = getMaxHostNameSize() + 1; | |
551 | std::string hostname; | |
552 | hostname.resize(maxHostNameBufSize, 0); | |
553 | ||
554 | if (gethostname(hostname.data(), maxHostNameBufSize) == -1) { | |
555 | return std::nullopt; | |
556 | } | |
557 | ||
558 | hostname.resize(strlen(hostname.c_str())); | |
559 | return std::make_optional(hostname); | |
560 | } | |
561 | ||
562 | std::string getCarbonHostName() | |
563 | { | |
564 | auto hostname = getHostname(); | |
565 | if (!hostname.has_value()) { | |
566 | throw std::runtime_error(stringerror()); | |
567 | } | |
568 | ||
569 | boost::replace_all(*hostname, ".", "_"); | |
570 | return *hostname; | |
12c86877 BH |
571 | } |
572 | ||
d88babea KM |
573 | string bitFlip(const string &str) |
574 | { | |
575 | string::size_type pos=0, epos=str.size(); | |
576 | string ret; | |
577 | ret.reserve(epos); | |
578 | for(;pos < epos; ++pos) | |
579 | ret.append(1, ~str[pos]); | |
580 | return ret; | |
581 | } | |
22c9c86a | 582 | |
12c86877 BH |
583 | void cleanSlashes(string &str) |
584 | { | |
12c86877 | 585 | string out; |
b289a3bb RG |
586 | bool keepNextSlash = true; |
587 | for (const auto& value : str) { | |
588 | if (value == '/') { | |
589 | if (keepNextSlash) { | |
590 | keepNextSlash = false; | |
591 | } | |
592 | else { | |
593 | continue; | |
594 | } | |
595 | } | |
596 | else { | |
597 | keepNextSlash = true; | |
598 | } | |
599 | out.append(1, value); | |
12c86877 | 600 | } |
b289a3bb | 601 | str = std::move(out); |
12c86877 BH |
602 | } |
603 | ||
092f210a | 604 | bool IpToU32(const string &str, uint32_t *ip) |
525b8a7c | 605 | { |
4cf26303 BH |
606 | if(str.empty()) { |
607 | *ip=0; | |
608 | return true; | |
609 | } | |
3ddb9247 | 610 | |
092c9cc4 | 611 | struct in_addr inp; |
3897b9e1 | 612 | if(inet_aton(str.c_str(), &inp)) { |
092c9cc4 BH |
613 | *ip=inp.s_addr; |
614 | return true; | |
615 | } | |
616 | return false; | |
525b8a7c BH |
617 | } |
618 | ||
5730f30c BH |
619 | string U32ToIP(uint32_t val) |
620 | { | |
621 | char tmp[17]; | |
9b2244e1 | 622 | snprintf(tmp, sizeof(tmp), "%u.%u.%u.%u", |
4957a608 BH |
623 | (val >> 24)&0xff, |
624 | (val >> 16)&0xff, | |
625 | (val >> 8)&0xff, | |
626 | (val )&0xff); | |
bfbf6814 | 627 | return string(tmp); |
5730f30c BH |
628 | } |
629 | ||
37d3f960 | 630 | |
2db9c30e BH |
631 | string makeHexDump(const string& str) |
632 | { | |
8c7a1b8a | 633 | std::array<char, 5> tmp; |
2db9c30e | 634 | string ret; |
8c7a1b8a | 635 | ret.reserve(static_cast<size_t>(str.size()*2.2)); |
2db9c30e | 636 | |
8c7a1b8a RG |
637 | for (char n : str) { |
638 | snprintf(tmp.data(), tmp.size(), "%02x ", static_cast<unsigned char>(n)); | |
639 | ret += tmp.data(); | |
2db9c30e BH |
640 | } |
641 | return ret; | |
642 | } | |
643 | ||
a02d0fa6 PL |
644 | string makeBytesFromHex(const string &in) { |
645 | if (in.size() % 2 != 0) { | |
646 | throw std::range_error("odd number of bytes in hex string"); | |
647 | } | |
648 | string ret; | |
50953de8 RG |
649 | ret.reserve(in.size() / 2); |
650 | ||
50953de8 RG |
651 | for (size_t i = 0; i < in.size(); i += 2) { |
652 | const auto numStr = in.substr(i, 2); | |
7f73a566 | 653 | unsigned int num = 0; |
50953de8 RG |
654 | if (sscanf(numStr.c_str(), "%02x", &num) != 1) { |
655 | throw std::range_error("Invalid value while parsing the hex string '" + in + "'"); | |
656 | } | |
657 | ret.push_back(static_cast<uint8_t>(num)); | |
a02d0fa6 | 658 | } |
50953de8 | 659 | |
a02d0fa6 PL |
660 | return ret; |
661 | } | |
662 | ||
88358c9b BH |
663 | void normalizeTV(struct timeval& tv) |
664 | { | |
665 | if(tv.tv_usec > 1000000) { | |
666 | ++tv.tv_sec; | |
667 | tv.tv_usec-=1000000; | |
668 | } | |
669 | else if(tv.tv_usec < 0) { | |
670 | --tv.tv_sec; | |
671 | tv.tv_usec+=1000000; | |
672 | } | |
673 | } | |
674 | ||
d2adfa5c | 675 | struct timeval operator+(const struct timeval& lhs, const struct timeval& rhs) |
88358c9b BH |
676 | { |
677 | struct timeval ret; | |
678 | ret.tv_sec=lhs.tv_sec + rhs.tv_sec; | |
679 | ret.tv_usec=lhs.tv_usec + rhs.tv_usec; | |
680 | normalizeTV(ret); | |
681 | return ret; | |
682 | } | |
683 | ||
d2adfa5c | 684 | struct timeval operator-(const struct timeval& lhs, const struct timeval& rhs) |
88358c9b BH |
685 | { |
686 | struct timeval ret; | |
687 | ret.tv_sec=lhs.tv_sec - rhs.tv_sec; | |
688 | ret.tv_usec=lhs.tv_usec - rhs.tv_usec; | |
689 | normalizeTV(ret); | |
690 | return ret; | |
691 | } | |
50c79a76 BH |
692 | |
693 | pair<string, string> splitField(const string& inp, char sepa) | |
694 | { | |
695 | pair<string, string> ret; | |
696 | string::size_type cpos=inp.find(sepa); | |
697 | if(cpos==string::npos) | |
698 | ret.first=inp; | |
699 | else { | |
700 | ret.first=inp.substr(0, cpos); | |
701 | ret.second=inp.substr(cpos+1); | |
702 | } | |
703 | return ret; | |
704 | } | |
6e2514e4 | 705 | |
f8499e52 | 706 | int logFacilityToLOG(unsigned int facility) |
6e2514e4 | 707 | { |
6e2514e4 BH |
708 | switch(facility) { |
709 | case 0: | |
710 | return LOG_LOCAL0; | |
711 | case 1: | |
712 | return(LOG_LOCAL1); | |
713 | case 2: | |
714 | return(LOG_LOCAL2); | |
715 | case 3: | |
716 | return(LOG_LOCAL3); | |
717 | case 4: | |
718 | return(LOG_LOCAL4); | |
719 | case 5: | |
720 | return(LOG_LOCAL5); | |
721 | case 6: | |
722 | return(LOG_LOCAL6); | |
723 | case 7: | |
724 | return(LOG_LOCAL7); | |
725 | default: | |
f8499e52 | 726 | return -1; |
6e2514e4 BH |
727 | } |
728 | } | |
da042e6e BH |
729 | |
730 | string stripDot(const string& dom) | |
731 | { | |
732 | if(dom.empty()) | |
733 | return dom; | |
734 | ||
735 | if(dom[dom.size()-1]!='.') | |
736 | return dom; | |
737 | ||
738 | return dom.substr(0,dom.size()-1); | |
739 | } | |
4dadd22f | 740 | |
f71bc087 BH |
741 | int makeIPv6sockaddr(const std::string& addr, struct sockaddr_in6* ret) |
742 | { | |
1a736a1a | 743 | if (addr.empty()) { |
85db02c5 | 744 | return -1; |
1a736a1a FM |
745 | } |
746 | ||
85db02c5 | 747 | string ourAddr(addr); |
1a736a1a FM |
748 | std::optional<uint16_t> port = std::nullopt; |
749 | ||
3a9b5bc5 | 750 | if (addr[0] == '[') { // [::]:53 style address |
85db02c5 | 751 | string::size_type pos = addr.find(']'); |
1a736a1a | 752 | if (pos == string::npos) { |
85db02c5 | 753 | return -1; |
1a736a1a FM |
754 | } |
755 | ||
3a9b5bc5 | 756 | ourAddr.assign(addr.c_str() + 1, pos - 1); |
ed2ff96e | 757 | if (pos + 1 != addr.size()) { // complete after ], no port specified |
1a736a1a | 758 | if (pos + 2 > addr.size() || addr[pos + 1] != ':') { |
0047d734 | 759 | return -1; |
1a736a1a FM |
760 | } |
761 | ||
0047d734 | 762 | try { |
1a736a1a FM |
763 | auto tmpPort = pdns::checked_stoi<uint16_t>(addr.substr(pos + 2)); |
764 | port = std::make_optional(tmpPort); | |
0047d734 | 765 | } |
3a9b5bc5 | 766 | catch (const std::out_of_range&) { |
0047d734 CH |
767 | return -1; |
768 | } | |
5b4ed369 | 769 | } |
85db02c5 | 770 | } |
1a736a1a | 771 | |
3a9b5bc5 FM |
772 | ret->sin6_scope_id = 0; |
773 | ret->sin6_family = AF_INET6; | |
39d2d9b2 | 774 | |
3a9b5bc5 | 775 | if (inet_pton(AF_INET6, ourAddr.c_str(), (void*)&ret->sin6_addr) != 1) { |
1a736a1a FM |
776 | struct addrinfo hints{}; |
777 | std::memset(&hints, 0, sizeof(struct addrinfo)); | |
0c9de4fc | 778 | hints.ai_flags = AI_NUMERICHOST; |
1a736a1a | 779 | hints.ai_family = AF_INET6; |
3ddb9247 | 780 | |
1a736a1a | 781 | struct addrinfo* res = nullptr; |
1746e9bb | 782 | // getaddrinfo has anomalous return codes, anything nonzero is an error, positive or negative |
4646277d | 783 | if (getaddrinfo(ourAddr.c_str(), nullptr, &hints, &res) != 0) { |
0c9de4fc | 784 | return -1; |
785 | } | |
3ddb9247 | 786 | |
0c9de4fc | 787 | memcpy(ret, res->ai_addr, res->ai_addrlen); |
788 | freeaddrinfo(res); | |
f71bc087 | 789 | } |
0c9de4fc | 790 | |
1a736a1a FM |
791 | if (port.has_value()) { |
792 | ret->sin6_port = htons(*port); | |
6cbfa73b | 793 | } |
0c9de4fc | 794 | |
f71bc087 BH |
795 | return 0; |
796 | } | |
834942f1 | 797 | |
76cb4593 | 798 | int makeIPv4sockaddr(const std::string& str, struct sockaddr_in* ret) |
85db02c5 BH |
799 | { |
800 | if(str.empty()) { | |
801 | return -1; | |
802 | } | |
803 | struct in_addr inp; | |
3ddb9247 | 804 | |
85db02c5 BH |
805 | string::size_type pos = str.find(':'); |
806 | if(pos == string::npos) { // no port specified, not touching the port | |
3897b9e1 | 807 | if(inet_aton(str.c_str(), &inp)) { |
85db02c5 BH |
808 | ret->sin_addr.s_addr=inp.s_addr; |
809 | return 0; | |
810 | } | |
811 | return -1; | |
812 | } | |
813 | if(!*(str.c_str() + pos + 1)) // trailing : | |
3ddb9247 PD |
814 | return -1; |
815 | ||
f1b2ae9b | 816 | char *eptr = const_cast<char*>(str.c_str()) + str.size(); |
85db02c5 | 817 | int port = strtol(str.c_str() + pos + 1, &eptr, 10); |
5b4ed369 PL |
818 | if (port < 0 || port > 65535) |
819 | return -1; | |
820 | ||
85db02c5 BH |
821 | if(*eptr) |
822 | return -1; | |
3ddb9247 | 823 | |
85db02c5 | 824 | ret->sin_port = htons(port); |
3897b9e1 | 825 | if(inet_aton(str.substr(0, pos).c_str(), &inp)) { |
85db02c5 BH |
826 | ret->sin_addr.s_addr=inp.s_addr; |
827 | return 0; | |
828 | } | |
829 | return -1; | |
830 | } | |
831 | ||
76cb4593 CH |
832 | int makeUNsockaddr(const std::string& path, struct sockaddr_un* ret) |
833 | { | |
834 | if (path.empty()) | |
835 | return -1; | |
836 | ||
837 | memset(ret, 0, sizeof(struct sockaddr_un)); | |
838 | ret->sun_family = AF_UNIX; | |
839 | if (path.length() >= sizeof(ret->sun_path)) | |
840 | return -1; | |
841 | ||
842 | path.copy(ret->sun_path, sizeof(ret->sun_path), 0); | |
843 | return 0; | |
844 | } | |
85db02c5 | 845 | |
834942f1 BH |
846 | //! read a line of text from a FILE* to a std::string, returns false on 'no data' |
847 | bool stringfgets(FILE* fp, std::string& line) | |
848 | { | |
849 | char buffer[1024]; | |
850 | line.clear(); | |
3ddb9247 | 851 | |
834942f1 BH |
852 | do { |
853 | if(!fgets(buffer, sizeof(buffer), fp)) | |
854 | return !line.empty(); | |
3ddb9247 PD |
855 | |
856 | line.append(buffer); | |
834942f1 BH |
857 | } while(!strchr(buffer, '\n')); |
858 | return true; | |
859 | } | |
e611a06c | 860 | |
4e9a20e6 | 861 | bool readFileIfThere(const char* fname, std::string* line) |
862 | { | |
863 | line->clear(); | |
114b8796 RG |
864 | auto filePtr = pdns::UniqueFilePtr(fopen(fname, "r")); |
865 | if (!filePtr) { | |
4e9a20e6 | 866 | return false; |
11917b03 | 867 | } |
114b8796 | 868 | return stringfgets(filePtr.get(), *line); |
4e9a20e6 | 869 | } |
870 | ||
3ee84c3f BH |
871 | Regex::Regex(const string &expr) |
872 | { | |
873 | if(regcomp(&d_preg, expr.c_str(), REG_ICASE|REG_NOSUB|REG_EXTENDED)) | |
3f81d239 | 874 | throw PDNSException("Regular expression did not compile"); |
3ee84c3f | 875 | } |
65d8e171 | 876 | |
25ba7344 PD |
877 | // if you end up here because valgrind told you were are doing something wrong |
878 | // with msgh->msg_controllen, please refer to https://github.com/PowerDNS/pdns/pull/3962 | |
879 | // first. | |
7bec330a | 880 | // Note that cmsgbuf should be aligned the same as a struct cmsghdr |
7bec330a | 881 | void addCMsgSrcAddr(struct msghdr* msgh, cmsgbuf_aligned* cmsgbuf, const ComboAddress* source, int itfIndex) |
65d8e171 | 882 | { |
4646277d | 883 | struct cmsghdr *cmsg = nullptr; |
65d8e171 KN |
884 | |
885 | if(source->sin4.sin_family == AF_INET6) { | |
886 | struct in6_pktinfo *pkt; | |
887 | ||
888 | msgh->msg_control = cmsgbuf; | |
aeb011b7 RG |
889 | #if !defined( __APPLE__ ) |
890 | /* CMSG_SPACE is not a constexpr on macOS */ | |
7f818542 | 891 | static_assert(CMSG_SPACE(sizeof(*pkt)) <= sizeof(*cmsgbuf), "Buffer is too small for in6_pktinfo"); |
aeb011b7 RG |
892 | #else /* __APPLE__ */ |
893 | if (CMSG_SPACE(sizeof(*pkt)) > sizeof(*cmsgbuf)) { | |
894 | throw std::runtime_error("Buffer is too small for in6_pktinfo"); | |
895 | } | |
896 | #endif /* __APPLE__ */ | |
65d8e171 KN |
897 | msgh->msg_controllen = CMSG_SPACE(sizeof(*pkt)); |
898 | ||
899 | cmsg = CMSG_FIRSTHDR(msgh); | |
900 | cmsg->cmsg_level = IPPROTO_IPV6; | |
901 | cmsg->cmsg_type = IPV6_PKTINFO; | |
902 | cmsg->cmsg_len = CMSG_LEN(sizeof(*pkt)); | |
903 | ||
904 | pkt = (struct in6_pktinfo *) CMSG_DATA(cmsg); | |
20b22895 OM |
905 | // Include the padding to stop valgrind complaining about passing uninitialized data |
906 | memset(pkt, 0, CMSG_SPACE(sizeof(*pkt))); | |
65d8e171 | 907 | pkt->ipi6_addr = source->sin6.sin6_addr; |
fbe2a2e0 | 908 | pkt->ipi6_ifindex = itfIndex; |
65d8e171 KN |
909 | } |
910 | else { | |
4d39d7f3 | 911 | #if defined(IP_PKTINFO) |
65d8e171 KN |
912 | struct in_pktinfo *pkt; |
913 | ||
914 | msgh->msg_control = cmsgbuf; | |
aeb011b7 RG |
915 | #if !defined( __APPLE__ ) |
916 | /* CMSG_SPACE is not a constexpr on macOS */ | |
7f818542 | 917 | static_assert(CMSG_SPACE(sizeof(*pkt)) <= sizeof(*cmsgbuf), "Buffer is too small for in_pktinfo"); |
aeb011b7 RG |
918 | #else /* __APPLE__ */ |
919 | if (CMSG_SPACE(sizeof(*pkt)) > sizeof(*cmsgbuf)) { | |
920 | throw std::runtime_error("Buffer is too small for in_pktinfo"); | |
921 | } | |
922 | #endif /* __APPLE__ */ | |
65d8e171 KN |
923 | msgh->msg_controllen = CMSG_SPACE(sizeof(*pkt)); |
924 | ||
925 | cmsg = CMSG_FIRSTHDR(msgh); | |
926 | cmsg->cmsg_level = IPPROTO_IP; | |
927 | cmsg->cmsg_type = IP_PKTINFO; | |
928 | cmsg->cmsg_len = CMSG_LEN(sizeof(*pkt)); | |
929 | ||
930 | pkt = (struct in_pktinfo *) CMSG_DATA(cmsg); | |
20b22895 OM |
931 | // Include the padding to stop valgrind complaining about passing uninitialized data |
932 | memset(pkt, 0, CMSG_SPACE(sizeof(*pkt))); | |
65d8e171 | 933 | pkt->ipi_spec_dst = source->sin4.sin_addr; |
fbe2a2e0 | 934 | pkt->ipi_ifindex = itfIndex; |
4d39d7f3 | 935 | #elif defined(IP_SENDSRCADDR) |
65d8e171 KN |
936 | struct in_addr *in; |
937 | ||
938 | msgh->msg_control = cmsgbuf; | |
aeb011b7 | 939 | #if !defined( __APPLE__ ) |
7f818542 | 940 | static_assert(CMSG_SPACE(sizeof(*in)) <= sizeof(*cmsgbuf), "Buffer is too small for in_addr"); |
aeb011b7 RG |
941 | #else /* __APPLE__ */ |
942 | if (CMSG_SPACE(sizeof(*in)) > sizeof(*cmsgbuf)) { | |
943 | throw std::runtime_error("Buffer is too small for in_addr"); | |
944 | } | |
945 | #endif /* __APPLE__ */ | |
65d8e171 KN |
946 | msgh->msg_controllen = CMSG_SPACE(sizeof(*in)); |
947 | ||
948 | cmsg = CMSG_FIRSTHDR(msgh); | |
949 | cmsg->cmsg_level = IPPROTO_IP; | |
950 | cmsg->cmsg_type = IP_SENDSRCADDR; | |
951 | cmsg->cmsg_len = CMSG_LEN(sizeof(*in)); | |
952 | ||
20b22895 | 953 | // Include the padding to stop valgrind complaining about passing uninitialized data |
65d8e171 | 954 | in = (struct in_addr *) CMSG_DATA(cmsg); |
20b22895 | 955 | memset(in, 0, CMSG_SPACE(sizeof(*in))); |
65d8e171 | 956 | *in = source->sin4.sin_addr; |
ecc8571f | 957 | #endif |
65d8e171 KN |
958 | } |
959 | } | |
3a8a4d68 | 960 | |
961 | unsigned int getFilenumLimit(bool hardOrSoft) | |
962 | { | |
963 | struct rlimit rlim; | |
964 | if(getrlimit(RLIMIT_NOFILE, &rlim) < 0) | |
965 | unixDie("Requesting number of available file descriptors"); | |
966 | return hardOrSoft ? rlim.rlim_max : rlim.rlim_cur; | |
967 | } | |
968 | ||
969 | void setFilenumLimit(unsigned int lim) | |
970 | { | |
971 | struct rlimit rlim; | |
972 | ||
973 | if(getrlimit(RLIMIT_NOFILE, &rlim) < 0) | |
974 | unixDie("Requesting number of available file descriptors"); | |
975 | rlim.rlim_cur=lim; | |
976 | if(setrlimit(RLIMIT_NOFILE, &rlim) < 0) | |
977 | unixDie("Setting number of available file descriptors"); | |
978 | } | |
06ea9015 | 979 | |
915b0c39 | 980 | bool setSocketTimestamps(int fd) |
9ae194e2 | 981 | { |
eb4c1792 | 982 | #ifdef SO_TIMESTAMP |
9ae194e2 | 983 | int on=1; |
915b0c39 | 984 | return setsockopt(fd, SOL_SOCKET, SO_TIMESTAMP, (char*)&on, sizeof(on)) == 0; |
99be0a43 | 985 | #else |
915b0c39 | 986 | return true; // we pretend this happened. |
99be0a43 | 987 | #endif |
9ae194e2 | 988 | } |
58044407 | 989 | |
883a30a7 | 990 | bool setTCPNoDelay(int sock) |
149d0144 | 991 | { |
992 | int flag = 1; | |
883a30a7 RG |
993 | return setsockopt(sock, /* socket affected */ |
994 | IPPROTO_TCP, /* set option at TCP level */ | |
995 | TCP_NODELAY, /* name of option */ | |
996 | (char *) &flag, /* the cast is historical cruft */ | |
997 | sizeof(flag)) == 0; /* length of option value */ | |
149d0144 | 998 | } |
999 | ||
1000 | ||
3897b9e1 | 1001 | bool setNonBlocking(int sock) |
1002 | { | |
3ddb9247 | 1003 | int flags=fcntl(sock,F_GETFL,0); |
3897b9e1 | 1004 | if(flags<0 || fcntl(sock, F_SETFL,flags|O_NONBLOCK) <0) |
1005 | return false; | |
1006 | return true; | |
1007 | } | |
1008 | ||
1009 | bool setBlocking(int sock) | |
1010 | { | |
3ddb9247 | 1011 | int flags=fcntl(sock,F_GETFL,0); |
3897b9e1 | 1012 | if(flags<0 || fcntl(sock, F_SETFL,flags&(~O_NONBLOCK)) <0) |
1013 | return false; | |
1014 | return true; | |
1015 | } | |
1016 | ||
bf676f2f PL |
1017 | bool setReuseAddr(int sock) |
1018 | { | |
1019 | int tmp = 1; | |
1020 | if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char*)&tmp, static_cast<unsigned>(sizeof tmp))<0) | |
04360367 | 1021 | throw PDNSException(string("Setsockopt failed: ")+stringerror()); |
bf676f2f PL |
1022 | return true; |
1023 | } | |
1024 | ||
18861f97 RG |
1025 | bool isNonBlocking(int sock) |
1026 | { | |
1027 | int flags=fcntl(sock,F_GETFL,0); | |
1028 | return flags & O_NONBLOCK; | |
1029 | } | |
1030 | ||
3bb98d97 | 1031 | bool setReceiveSocketErrors([[maybe_unused]] int sock, [[maybe_unused]] int af) |
29bb743c OM |
1032 | { |
1033 | #ifdef __linux__ | |
1034 | int tmp = 1, ret; | |
1035 | if (af == AF_INET) { | |
1036 | ret = setsockopt(sock, IPPROTO_IP, IP_RECVERR, &tmp, sizeof(tmp)); | |
1037 | } else { | |
1038 | ret = setsockopt(sock, IPPROTO_IPV6, IPV6_RECVERR, &tmp, sizeof(tmp)); | |
1039 | } | |
1040 | if (ret < 0) { | |
04360367 | 1041 | throw PDNSException(string("Setsockopt failed: ") + stringerror()); |
29bb743c OM |
1042 | } |
1043 | #endif | |
1044 | return true; | |
1045 | } | |
1046 | ||
3897b9e1 | 1047 | // Closes a socket. |
18e9f940 | 1048 | int closesocket(int socket) |
3897b9e1 | 1049 | { |
18e9f940 OM |
1050 | int ret = ::close(socket); |
1051 | if(ret < 0 && errno == ECONNRESET) { // see ticket 192, odd BSD behaviour | |
3897b9e1 | 1052 | return 0; |
18e9f940 OM |
1053 | } |
1054 | if (ret < 0) { | |
1055 | int err = errno; | |
1056 | throw PDNSException("Error closing socket: " + stringerror(err)); | |
1057 | } | |
3897b9e1 | 1058 | return ret; |
1059 | } | |
1060 | ||
1061 | bool setCloseOnExec(int sock) | |
1062 | { | |
3ddb9247 | 1063 | int flags=fcntl(sock,F_GETFD,0); |
3897b9e1 | 1064 | if(flags<0 || fcntl(sock, F_SETFD,flags|FD_CLOEXEC) <0) |
1065 | return false; | |
1066 | return true; | |
1067 | } | |
1068 | ||
6907f014 | 1069 | #ifdef __linux__ |
ab7cf5f0 RG |
1070 | #include <linux/rtnetlink.h> |
1071 | ||
1072 | int getMACAddress(const ComboAddress& ca, char* dest, size_t destLen) | |
1073 | { | |
1074 | struct { | |
1075 | struct nlmsghdr headermsg; | |
1076 | struct ndmsg neighbormsg; | |
1077 | } request; | |
1078 | ||
1079 | std::array<char, 8192> buffer; | |
1080 | ||
1081 | auto sock = FDWrapper(socket(AF_NETLINK, SOCK_RAW|SOCK_CLOEXEC, NETLINK_ROUTE)); | |
1082 | if (sock.getHandle() == -1) { | |
1083 | return errno; | |
6f238a33 | 1084 | } |
ab7cf5f0 RG |
1085 | |
1086 | memset(&request, 0, sizeof(request)); | |
1087 | request.headermsg.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1088 | request.headermsg.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP; | |
1089 | request.headermsg.nlmsg_type = RTM_GETNEIGH; | |
1090 | request.neighbormsg.ndm_family = ca.sin4.sin_family; | |
1091 | ||
1092 | while (true) { | |
1093 | ssize_t sent = send(sock.getHandle(), &request, sizeof(request), 0); | |
1094 | if (sent == -1) { | |
1095 | if (errno == EINTR) { | |
1096 | continue; | |
1097 | } | |
1098 | return errno; | |
1099 | } | |
1100 | else if (static_cast<size_t>(sent) != sizeof(request)) { | |
1101 | return EIO; | |
1102 | } | |
1103 | break; | |
6f238a33 | 1104 | } |
ab7cf5f0 RG |
1105 | |
1106 | bool done = false; | |
1107 | bool foundIP = false; | |
1108 | bool foundMAC = false; | |
1109 | do { | |
1110 | ssize_t got = recv(sock.getHandle(), buffer.data(), buffer.size(), 0); | |
1111 | ||
1112 | if (got < 0) { | |
1113 | if (errno == EINTR) { | |
1114 | continue; | |
1115 | } | |
1116 | return errno; | |
1117 | } | |
1118 | ||
1119 | size_t remaining = static_cast<size_t>(got); | |
1120 | for (struct nlmsghdr* nlmsgheader = reinterpret_cast<struct nlmsghdr*>(buffer.data()); | |
1121 | done == false && NLMSG_OK (nlmsgheader, remaining); | |
1122 | nlmsgheader = reinterpret_cast<struct nlmsghdr*>(NLMSG_NEXT(nlmsgheader, remaining))) { | |
1123 | ||
1124 | if (nlmsgheader->nlmsg_type == NLMSG_DONE) { | |
1125 | done = true; | |
1126 | break; | |
1127 | } | |
1128 | ||
1129 | auto nd = reinterpret_cast<struct ndmsg*>(NLMSG_DATA(nlmsgheader)); | |
f161f5ff | 1130 | auto rtatp = reinterpret_cast<struct rtattr*>(reinterpret_cast<char*>(nd) + NLMSG_ALIGN(sizeof(struct ndmsg))); |
ab7cf5f0 RG |
1131 | int rtattrlen = nlmsgheader->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); |
1132 | ||
1133 | if (nd->ndm_family != ca.sin4.sin_family) { | |
1134 | continue; | |
1135 | } | |
1136 | ||
6cb04f61 RG |
1137 | 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) { |
1138 | continue; | |
1139 | } | |
1140 | ||
ab7cf5f0 RG |
1141 | for (; done == false && RTA_OK(rtatp, rtattrlen); rtatp = RTA_NEXT(rtatp, rtattrlen)) { |
1142 | if (rtatp->rta_type == NDA_DST){ | |
1143 | if (nd->ndm_family == AF_INET) { | |
1144 | auto inp = reinterpret_cast<struct in_addr*>(RTA_DATA(rtatp)); | |
1145 | if (inp->s_addr == ca.sin4.sin_addr.s_addr) { | |
1146 | foundIP = true; | |
1147 | } | |
1148 | } | |
1149 | else if (nd->ndm_family == AF_INET6) { | |
1150 | auto inp = reinterpret_cast<struct in6_addr *>(RTA_DATA(rtatp)); | |
1151 | if (memcmp(inp->s6_addr, ca.sin6.sin6_addr.s6_addr, sizeof(ca.sin6.sin6_addr.s6_addr)) == 0) { | |
1152 | foundIP = true; | |
1153 | } | |
1154 | } | |
1155 | } | |
1156 | else if (rtatp->rta_type == NDA_LLADDR) { | |
1157 | if (foundIP) { | |
7c591a96 RG |
1158 | size_t addrLen = rtatp->rta_len - sizeof(struct rtattr); |
1159 | if (addrLen > destLen) { | |
1160 | return ENOBUFS; | |
ab7cf5f0 | 1161 | } |
7c591a96 | 1162 | memcpy(dest, reinterpret_cast<const char*>(rtatp) + sizeof(struct rtattr), addrLen); |
ab7cf5f0 RG |
1163 | foundMAC = true; |
1164 | done = true; | |
1165 | break; | |
1166 | } | |
1167 | } | |
1817fef6 | 1168 | } |
6907f014 | 1169 | } |
1170 | } | |
ab7cf5f0 RG |
1171 | while (done == false); |
1172 | ||
1173 | return foundMAC ? 0 : ENOENT; | |
1174 | } | |
1175 | #else | |
3bb98d97 | 1176 | int getMACAddress(const ComboAddress& /* ca */, char* /* dest */, size_t /* len */) |
ab7cf5f0 | 1177 | { |
6f238a33 CHB |
1178 | return ENOENT; |
1179 | } | |
ab7cf5f0 RG |
1180 | #endif /* __linux__ */ |
1181 | ||
6f238a33 CHB |
1182 | string getMACAddress(const ComboAddress& ca) |
1183 | { | |
1184 | string ret; | |
1185 | char tmp[6]; | |
1186 | if (getMACAddress(ca, tmp, sizeof(tmp)) == 0) { | |
1187 | ret.append(tmp, sizeof(tmp)); | |
1188 | } | |
6907f014 | 1189 | return ret; |
1190 | } | |
1191 | ||
3bb98d97 | 1192 | uint64_t udpErrorStats([[maybe_unused]] const std::string& str) |
8290ad9f | 1193 | { |
1194 | #ifdef __linux__ | |
1195 | ifstream ifs("/proc/net/snmp"); | |
68c3e465 | 1196 | if (!ifs) { |
8290ad9f | 1197 | return 0; |
68c3e465 RG |
1198 | } |
1199 | ||
8290ad9f | 1200 | string line; |
68c3e465 RG |
1201 | while (getline(ifs, line)) { |
1202 | if (boost::starts_with(line, "Udp: ") && isdigit(line.at(5))) { | |
84d1d33a | 1203 | vector<string> parts; |
8290ad9f | 1204 | stringtok(parts, line, " \n\t\r"); |
68c3e465 RG |
1205 | |
1206 | if (parts.size() < 7) { | |
f9562824 | 1207 | break; |
68c3e465 RG |
1208 | } |
1209 | ||
1210 | if (str == "udp-rcvbuf-errors") { | |
f9562824 | 1211 | return std::stoull(parts.at(5)); |
68c3e465 RG |
1212 | } |
1213 | else if (str == "udp-sndbuf-errors") { | |
f9562824 | 1214 | return std::stoull(parts.at(6)); |
68c3e465 RG |
1215 | } |
1216 | else if (str == "udp-noport-errors") { | |
f9562824 | 1217 | return std::stoull(parts.at(2)); |
68c3e465 RG |
1218 | } |
1219 | else if (str == "udp-in-errors") { | |
f9562824 | 1220 | return std::stoull(parts.at(3)); |
68c3e465 RG |
1221 | } |
1222 | else if (parts.size() >= 8 && str == "udp-in-csum-errors") { | |
1223 | return std::stoull(parts.at(7)); | |
1224 | } | |
1225 | else { | |
f9562824 | 1226 | return 0; |
68c3e465 | 1227 | } |
8290ad9f | 1228 | } |
1229 | } | |
1230 | #endif | |
1231 | return 0; | |
1232 | } | |
da15912b | 1233 | |
3bb98d97 | 1234 | uint64_t udp6ErrorStats([[maybe_unused]] const std::string& str) |
84d1d33a RG |
1235 | { |
1236 | #ifdef __linux__ | |
1237 | const std::map<std::string, std::string> keys = { | |
1238 | { "udp6-in-errors", "Udp6InErrors" }, | |
1239 | { "udp6-recvbuf-errors", "Udp6RcvbufErrors" }, | |
1240 | { "udp6-sndbuf-errors", "Udp6SndbufErrors" }, | |
1241 | { "udp6-noport-errors", "Udp6NoPorts" }, | |
1242 | { "udp6-in-csum-errors", "Udp6InCsumErrors" } | |
1243 | }; | |
1244 | ||
1245 | auto key = keys.find(str); | |
1246 | if (key == keys.end()) { | |
1247 | return 0; | |
1248 | } | |
1249 | ||
1250 | ifstream ifs("/proc/net/snmp6"); | |
1251 | if (!ifs) { | |
1252 | return 0; | |
1253 | } | |
1254 | ||
1255 | std::string line; | |
1256 | while (getline(ifs, line)) { | |
1257 | if (!boost::starts_with(line, key->second)) { | |
1258 | continue; | |
1259 | } | |
1260 | ||
1261 | std::vector<std::string> parts; | |
84d1d33a RG |
1262 | stringtok(parts, line, " \n\t\r"); |
1263 | ||
1264 | if (parts.size() != 2) { | |
1265 | return 0; | |
1266 | } | |
1267 | ||
1268 | return std::stoull(parts.at(1)); | |
1269 | } | |
1270 | #endif | |
1271 | return 0; | |
1272 | } | |
1273 | ||
d73de874 | 1274 | uint64_t tcpErrorStats(const std::string& /* str */) |
e150c22c RG |
1275 | { |
1276 | #ifdef __linux__ | |
1277 | ifstream ifs("/proc/net/netstat"); | |
1278 | if (!ifs) { | |
1279 | return 0; | |
1280 | } | |
1281 | ||
1282 | string line; | |
1283 | vector<string> parts; | |
1284 | while (getline(ifs,line)) { | |
1285 | if (line.size() > 9 && boost::starts_with(line, "TcpExt: ") && isdigit(line.at(8))) { | |
1286 | stringtok(parts, line, " \n\t\r"); | |
1287 | ||
1288 | if (parts.size() < 21) { | |
1289 | break; | |
1290 | } | |
1291 | ||
1292 | return std::stoull(parts.at(20)); | |
1293 | } | |
1294 | } | |
1295 | #endif | |
1296 | return 0; | |
1297 | } | |
1298 | ||
d73de874 | 1299 | uint64_t getCPUIOWait(const std::string& /* str */) |
591d1bd3 RG |
1300 | { |
1301 | #ifdef __linux__ | |
1302 | ifstream ifs("/proc/stat"); | |
1303 | if (!ifs) { | |
1304 | return 0; | |
1305 | } | |
1306 | ||
1307 | string line; | |
1308 | vector<string> parts; | |
1309 | while (getline(ifs, line)) { | |
1310 | if (boost::starts_with(line, "cpu ")) { | |
1311 | stringtok(parts, line, " \n\t\r"); | |
1312 | ||
1313 | if (parts.size() < 6) { | |
1314 | break; | |
1315 | } | |
1316 | ||
1317 | return std::stoull(parts[5]); | |
1318 | } | |
1319 | } | |
1320 | #endif | |
1321 | return 0; | |
1322 | } | |
1323 | ||
d73de874 | 1324 | uint64_t getCPUSteal(const std::string& /* str */) |
591d1bd3 RG |
1325 | { |
1326 | #ifdef __linux__ | |
1327 | ifstream ifs("/proc/stat"); | |
1328 | if (!ifs) { | |
1329 | return 0; | |
1330 | } | |
1331 | ||
1332 | string line; | |
1333 | vector<string> parts; | |
1334 | while (getline(ifs, line)) { | |
1335 | if (boost::starts_with(line, "cpu ")) { | |
1336 | stringtok(parts, line, " \n\t\r"); | |
1337 | ||
1338 | if (parts.size() < 9) { | |
1339 | break; | |
1340 | } | |
1341 | ||
1342 | return std::stoull(parts[8]); | |
1343 | } | |
1344 | } | |
1345 | #endif | |
1346 | return 0; | |
1347 | } | |
1348 | ||
21a3792f | 1349 | bool getTSIGHashEnum(const DNSName& algoName, TSIGHashEnum& algoEnum) |
da15912b | 1350 | { |
2330c421 | 1351 | if (algoName == DNSName("hmac-md5.sig-alg.reg.int") || algoName == DNSName("hmac-md5")) |
da15912b | 1352 | algoEnum = TSIG_MD5; |
2330c421 | 1353 | else if (algoName == DNSName("hmac-sha1")) |
da15912b | 1354 | algoEnum = TSIG_SHA1; |
2330c421 | 1355 | else if (algoName == DNSName("hmac-sha224")) |
da15912b | 1356 | algoEnum = TSIG_SHA224; |
2330c421 | 1357 | else if (algoName == DNSName("hmac-sha256")) |
da15912b | 1358 | algoEnum = TSIG_SHA256; |
2330c421 | 1359 | else if (algoName == DNSName("hmac-sha384")) |
da15912b | 1360 | algoEnum = TSIG_SHA384; |
2330c421 | 1361 | else if (algoName == DNSName("hmac-sha512")) |
da15912b | 1362 | algoEnum = TSIG_SHA512; |
2330c421 | 1363 | else if (algoName == DNSName("gss-tsig")) |
bcb5b94e | 1364 | algoEnum = TSIG_GSS; |
da15912b AT |
1365 | else { |
1366 | return false; | |
1367 | } | |
1368 | return true; | |
1369 | } | |
bfd4efae | 1370 | |
21a3792f | 1371 | DNSName getTSIGAlgoName(TSIGHashEnum& algoEnum) |
bfd4efae AT |
1372 | { |
1373 | switch(algoEnum) { | |
8171ab83 | 1374 | case TSIG_MD5: return DNSName("hmac-md5.sig-alg.reg.int."); |
1375 | case TSIG_SHA1: return DNSName("hmac-sha1."); | |
1376 | case TSIG_SHA224: return DNSName("hmac-sha224."); | |
1377 | case TSIG_SHA256: return DNSName("hmac-sha256."); | |
1378 | case TSIG_SHA384: return DNSName("hmac-sha384."); | |
1379 | case TSIG_SHA512: return DNSName("hmac-sha512."); | |
1380 | case TSIG_GSS: return DNSName("gss-tsig."); | |
bfd4efae AT |
1381 | } |
1382 | throw PDNSException("getTSIGAlgoName does not understand given algorithm, please fix!"); | |
1383 | } | |
a1a787dc | 1384 | |
a9b6db56 | 1385 | uint64_t getOpenFileDescriptors(const std::string&) |
1386 | { | |
1387 | #ifdef __linux__ | |
d3190b7d RG |
1388 | uint64_t nbFileDescriptors = 0; |
1389 | const auto dirName = "/proc/" + std::to_string(getpid()) + "/fd/"; | |
1390 | auto directoryError = pdns::visit_directory(dirName, [&nbFileDescriptors]([[maybe_unused]] ino_t inodeNumber, const std::string_view& name) { | |
335da0ba AT |
1391 | uint32_t num; |
1392 | try { | |
d3190b7d RG |
1393 | pdns::checked_stoi_into(num, std::string(name)); |
1394 | if (std::to_string(num) == name) { | |
1395 | nbFileDescriptors++; | |
1396 | } | |
335da0ba | 1397 | } catch (...) { |
d3190b7d | 1398 | // was not a number. |
84a873c7 | 1399 | } |
d3190b7d RG |
1400 | return true; |
1401 | }); | |
1402 | if (directoryError) { | |
1403 | return 0U; | |
a9b6db56 | 1404 | } |
d3190b7d | 1405 | return nbFileDescriptors; |
a68eedb2 O |
1406 | #elif defined(__OpenBSD__) |
1407 | // FreeBSD also has this in libopenbsd, but I don't know if that's available always | |
1408 | return getdtablecount(); | |
a9b6db56 | 1409 | #else |
d3190b7d | 1410 | return 0U; |
a9b6db56 | 1411 | #endif |
1412 | } | |
1413 | ||
a1a787dc | 1414 | uint64_t getRealMemoryUsage(const std::string&) |
1415 | { | |
330dcb5c | 1416 | #ifdef __linux__ |
16101f83 | 1417 | ifstream ifs("/proc/self/statm"); |
330dcb5c OM |
1418 | if(!ifs) |
1419 | return 0; | |
1420 | ||
1421 | uint64_t size, resident, shared, text, lib, data; | |
1422 | ifs >> size >> resident >> shared >> text >> lib >> data; | |
1423 | ||
ff1f5c0f | 1424 | // We used to use "data" here, but it proves unreliable and even is marked "broken" |
1e05b07c | 1425 | // in https://www.kernel.org/doc/html/latest/filesystems/proc.html |
ff1f5c0f | 1426 | return resident * getpagesize(); |
330dcb5c OM |
1427 | #else |
1428 | struct rusage ru; | |
1429 | if (getrusage(RUSAGE_SELF, &ru) != 0) | |
1430 | return 0; | |
1431 | return ru.ru_maxrss * 1024; | |
1432 | #endif | |
1433 | } | |
1434 | ||
1435 | ||
1436 | uint64_t getSpecialMemoryUsage(const std::string&) | |
1437 | { | |
a1a787dc | 1438 | #ifdef __linux__ |
16101f83 | 1439 | ifstream ifs("/proc/self/smaps"); |
a1a787dc | 1440 | if(!ifs) |
1441 | return 0; | |
1442 | string line; | |
1443 | uint64_t bytes=0; | |
1444 | string header("Private_Dirty:"); | |
1445 | while(getline(ifs, line)) { | |
1446 | if(boost::starts_with(line, header)) { | |
335da0ba | 1447 | bytes += std::stoull(line.substr(header.length() + 1))*1024; |
a1a787dc | 1448 | } |
1449 | } | |
1450 | return bytes; | |
1451 | #else | |
1452 | return 0; | |
1453 | #endif | |
1454 | } | |
4f99f3d3 RG |
1455 | |
1456 | uint64_t getCPUTimeUser(const std::string&) | |
1457 | { | |
1458 | struct rusage ru; | |
1459 | getrusage(RUSAGE_SELF, &ru); | |
1460 | return (ru.ru_utime.tv_sec*1000ULL + ru.ru_utime.tv_usec/1000); | |
1461 | } | |
1462 | ||
1463 | uint64_t getCPUTimeSystem(const std::string&) | |
1464 | { | |
1465 | struct rusage ru; | |
1466 | getrusage(RUSAGE_SELF, &ru); | |
1467 | return (ru.ru_stime.tv_sec*1000ULL + ru.ru_stime.tv_usec/1000); | |
1468 | } | |
3fcaeeac | 1469 | |
1470 | double DiffTime(const struct timespec& first, const struct timespec& second) | |
1471 | { | |
d2adfa5c OM |
1472 | auto seconds = second.tv_sec - first.tv_sec; |
1473 | auto nseconds = second.tv_nsec - first.tv_nsec; | |
1e05b07c | 1474 | |
d2adfa5c OM |
1475 | if (nseconds < 0) { |
1476 | seconds -= 1; | |
1477 | nseconds += 1000000000; | |
3fcaeeac | 1478 | } |
d2adfa5c | 1479 | return static_cast<double>(seconds) + static_cast<double>(nseconds) / 1000000000.0; |
3fcaeeac | 1480 | } |
1481 | ||
1482 | double DiffTime(const struct timeval& first, const struct timeval& second) | |
1483 | { | |
1484 | int seconds=second.tv_sec - first.tv_sec; | |
1485 | int useconds=second.tv_usec - first.tv_usec; | |
1e05b07c | 1486 | |
3fcaeeac | 1487 | if(useconds < 0) { |
1488 | seconds-=1; | |
1489 | useconds+=1000000; | |
1490 | } | |
1491 | return seconds + useconds/1000000.0; | |
1492 | } | |
ffb07158 | 1493 | |
ffb07158 | 1494 | uid_t strToUID(const string &str) |
1495 | { | |
1496 | uid_t result = 0; | |
1497 | const char * cstr = str.c_str(); | |
1498 | struct passwd * pwd = getpwnam(cstr); | |
1499 | ||
4646277d | 1500 | if (pwd == nullptr) { |
e805cba5 | 1501 | long long val; |
ffb07158 | 1502 | |
e805cba5 RG |
1503 | try { |
1504 | val = stoll(str); | |
ffb07158 | 1505 | } |
e805cba5 RG |
1506 | catch(std::exception& e) { |
1507 | throw runtime_error((boost::format("Error: Unable to parse user ID %s") % cstr).str() ); | |
1508 | } | |
1509 | ||
1510 | if (val < std::numeric_limits<uid_t>::min() || val > std::numeric_limits<uid_t>::max()) { | |
1511 | throw runtime_error((boost::format("Error: Unable to parse user ID %s") % cstr).str() ); | |
ffb07158 | 1512 | } |
e805cba5 RG |
1513 | |
1514 | result = static_cast<uid_t>(val); | |
ffb07158 | 1515 | } |
1516 | else { | |
1517 | result = pwd->pw_uid; | |
1518 | } | |
1519 | ||
1520 | return result; | |
1521 | } | |
1522 | ||
1523 | gid_t strToGID(const string &str) | |
1524 | { | |
1525 | gid_t result = 0; | |
1526 | const char * cstr = str.c_str(); | |
1527 | struct group * grp = getgrnam(cstr); | |
1528 | ||
4646277d | 1529 | if (grp == nullptr) { |
e805cba5 | 1530 | long long val; |
ffb07158 | 1531 | |
e805cba5 RG |
1532 | try { |
1533 | val = stoll(str); | |
ffb07158 | 1534 | } |
e805cba5 RG |
1535 | catch(std::exception& e) { |
1536 | throw runtime_error((boost::format("Error: Unable to parse group ID %s") % cstr).str() ); | |
1537 | } | |
1538 | ||
1539 | if (val < std::numeric_limits<gid_t>::min() || val > std::numeric_limits<gid_t>::max()) { | |
1540 | throw runtime_error((boost::format("Error: Unable to parse group ID %s") % cstr).str() ); | |
ffb07158 | 1541 | } |
e805cba5 RG |
1542 | |
1543 | result = static_cast<gid_t>(val); | |
ffb07158 | 1544 | } |
1545 | else { | |
1546 | result = grp->gr_gid; | |
1547 | } | |
1548 | ||
1549 | return result; | |
1550 | } | |
1551 | ||
8fd25133 RG |
1552 | bool isSettingThreadCPUAffinitySupported() |
1553 | { | |
1554 | #ifdef HAVE_PTHREAD_SETAFFINITY_NP | |
1555 | return true; | |
1556 | #else | |
1557 | return false; | |
1558 | #endif | |
1559 | } | |
1560 | ||
3bb98d97 | 1561 | int mapThreadToCPUList([[maybe_unused]] pthread_t tid, [[maybe_unused]] const std::set<int>& cpus) |
8fd25133 RG |
1562 | { |
1563 | #ifdef HAVE_PTHREAD_SETAFFINITY_NP | |
4d39d7f3 TIH |
1564 | # ifdef __NetBSD__ |
1565 | cpuset_t *cpuset; | |
1566 | cpuset = cpuset_create(); | |
1567 | for (const auto cpuID : cpus) { | |
1568 | cpuset_set(cpuID, cpuset); | |
1569 | } | |
1570 | ||
1571 | return pthread_setaffinity_np(tid, | |
1572 | cpuset_size(cpuset), | |
1573 | cpuset); | |
1574 | # else | |
1575 | # ifdef __FreeBSD__ | |
1576 | # define cpu_set_t cpuset_t | |
1577 | # endif | |
8fd25133 RG |
1578 | cpu_set_t cpuset; |
1579 | CPU_ZERO(&cpuset); | |
1580 | for (const auto cpuID : cpus) { | |
1581 | CPU_SET(cpuID, &cpuset); | |
1582 | } | |
1583 | ||
1584 | return pthread_setaffinity_np(tid, | |
1585 | sizeof(cpuset), | |
1586 | &cpuset); | |
4d39d7f3 | 1587 | # endif |
99be0a43 | 1588 | #else |
8fd25133 | 1589 | return ENOSYS; |
99be0a43 | 1590 | #endif /* HAVE_PTHREAD_SETAFFINITY_NP */ |
8fd25133 | 1591 | } |
5d4e1ef8 RG |
1592 | |
1593 | std::vector<ComboAddress> getResolvers(const std::string& resolvConfPath) | |
1594 | { | |
1595 | std::vector<ComboAddress> results; | |
1596 | ||
1597 | ifstream ifs(resolvConfPath); | |
1598 | if (!ifs) { | |
1599 | return results; | |
1600 | } | |
1601 | ||
1602 | string line; | |
1603 | while(std::getline(ifs, line)) { | |
dc593046 | 1604 | boost::trim_right_if(line, boost::is_any_of(" \r\n\x1a")); |
5d4e1ef8 RG |
1605 | boost::trim_left(line); // leading spaces, let's be nice |
1606 | ||
1607 | string::size_type tpos = line.find_first_of(";#"); | |
1608 | if (tpos != string::npos) { | |
1609 | line.resize(tpos); | |
1610 | } | |
1611 | ||
1612 | if (boost::starts_with(line, "nameserver ") || boost::starts_with(line, "nameserver\t")) { | |
1613 | vector<string> parts; | |
1614 | stringtok(parts, line, " \t,"); // be REALLY nice | |
d2adfa5c | 1615 | for (auto iter = parts.begin() + 1; iter != parts.end(); ++iter) { |
5d4e1ef8 RG |
1616 | try { |
1617 | results.emplace_back(*iter, 53); | |
1618 | } | |
1619 | catch(...) | |
1620 | { | |
1621 | } | |
1622 | } | |
1623 | } | |
1624 | } | |
1625 | ||
1626 | return results; | |
1627 | } | |
ee271fc4 | 1628 | |
3bb98d97 | 1629 | size_t getPipeBufferSize([[maybe_unused]] int fd) |
ee271fc4 RG |
1630 | { |
1631 | #ifdef F_GETPIPE_SZ | |
1632 | int res = fcntl(fd, F_GETPIPE_SZ); | |
1633 | if (res == -1) { | |
1634 | return 0; | |
1635 | } | |
1636 | return res; | |
1637 | #else | |
1638 | errno = ENOSYS; | |
1639 | return 0; | |
1640 | #endif /* F_GETPIPE_SZ */ | |
1641 | } | |
1642 | ||
3bb98d97 | 1643 | bool setPipeBufferSize([[maybe_unused]] int fd, [[maybe_unused]] size_t size) |
ee271fc4 RG |
1644 | { |
1645 | #ifdef F_SETPIPE_SZ | |
60a133cc | 1646 | if (size > static_cast<size_t>(std::numeric_limits<int>::max())) { |
ee271fc4 RG |
1647 | errno = EINVAL; |
1648 | return false; | |
1649 | } | |
1650 | int newSize = static_cast<int>(size); | |
1651 | int res = fcntl(fd, F_SETPIPE_SZ, newSize); | |
1652 | if (res == -1) { | |
1653 | return false; | |
1654 | } | |
1655 | return true; | |
1656 | #else | |
1657 | errno = ENOSYS; | |
1658 | return false; | |
1659 | #endif /* F_SETPIPE_SZ */ | |
1660 | } | |
ef3ee606 RG |
1661 | |
1662 | DNSName reverseNameFromIP(const ComboAddress& ip) | |
1663 | { | |
1664 | if (ip.isIPv4()) { | |
1665 | std::string result("in-addr.arpa."); | |
1666 | auto ptr = reinterpret_cast<const uint8_t*>(&ip.sin4.sin_addr.s_addr); | |
1667 | for (size_t idx = 0; idx < sizeof(ip.sin4.sin_addr.s_addr); idx++) { | |
1668 | result = std::to_string(ptr[idx]) + "." + result; | |
1669 | } | |
1670 | return DNSName(result); | |
1671 | } | |
1672 | else if (ip.isIPv6()) { | |
1673 | std::string result("ip6.arpa."); | |
1674 | auto ptr = reinterpret_cast<const uint8_t*>(&ip.sin6.sin6_addr.s6_addr[0]); | |
1675 | for (size_t idx = 0; idx < sizeof(ip.sin6.sin6_addr.s6_addr); idx++) { | |
1676 | std::stringstream stream; | |
1677 | stream << std::hex << (ptr[idx] & 0x0F); | |
1678 | stream << '.'; | |
1679 | stream << std::hex << (((ptr[idx]) >> 4) & 0x0F); | |
1680 | stream << '.'; | |
1681 | result = stream.str() + result; | |
1682 | } | |
1683 | return DNSName(result); | |
1684 | } | |
1685 | ||
1686 | throw std::runtime_error("Calling reverseNameFromIP() for an address which is neither an IPv4 nor an IPv6"); | |
1687 | } | |
64d38231 | 1688 | |
032382bc PD |
1689 | std::string makeLuaString(const std::string& in) |
1690 | { | |
1691 | ostringstream str; | |
1692 | ||
1693 | str<<'"'; | |
1694 | ||
1695 | char item[5]; | |
1696 | for (unsigned char n : in) { | |
1697 | if (islower(n) || isupper(n)) { | |
1698 | item[0] = n; | |
1699 | item[1] = 0; | |
1700 | } | |
1701 | else { | |
1702 | snprintf(item, sizeof(item), "\\%03d", n); | |
1703 | } | |
1704 | str << item; | |
1705 | } | |
1706 | ||
1707 | str<<'"'; | |
1708 | ||
1709 | return str.str(); | |
1710 | } | |
e701f9d4 PL |
1711 | |
1712 | size_t parseSVCBValueList(const std::string &in, vector<std::string> &val) { | |
1713 | std::string parsed; | |
1714 | auto ret = parseRFC1035CharString(in, parsed); | |
1715 | parseSVCBValueListFromParsedRFC1035CharString(parsed, val); | |
1716 | return ret; | |
1717 | }; | |
b2504b29 RG |
1718 | |
1719 | #ifdef HAVE_CRYPTO_MEMCMP | |
1720 | #include <openssl/crypto.h> | |
dde80251 RG |
1721 | #else /* HAVE_CRYPTO_MEMCMP */ |
1722 | #ifdef HAVE_SODIUM_MEMCMP | |
1723 | #include <sodium.h> | |
1724 | #endif /* HAVE_SODIUM_MEMCMP */ | |
1725 | #endif /* HAVE_CRYPTO_MEMCMP */ | |
b2504b29 RG |
1726 | |
1727 | bool constantTimeStringEquals(const std::string& a, const std::string& b) | |
1728 | { | |
1729 | if (a.size() != b.size()) { | |
1730 | return false; | |
1731 | } | |
1732 | const size_t size = a.size(); | |
1733 | #ifdef HAVE_CRYPTO_MEMCMP | |
1734 | return CRYPTO_memcmp(a.c_str(), b.c_str(), size) == 0; | |
dde80251 RG |
1735 | #else /* HAVE_CRYPTO_MEMCMP */ |
1736 | #ifdef HAVE_SODIUM_MEMCMP | |
1737 | return sodium_memcmp(a.c_str(), b.c_str(), size) == 0; | |
1738 | #else /* HAVE_SODIUM_MEMCMP */ | |
b2504b29 RG |
1739 | const volatile unsigned char *_a = (const volatile unsigned char *) a.c_str(); |
1740 | const volatile unsigned char *_b = (const volatile unsigned char *) b.c_str(); | |
1741 | unsigned char res = 0; | |
1742 | ||
1743 | for (size_t idx = 0; idx < size; idx++) { | |
1744 | res |= _a[idx] ^ _b[idx]; | |
1745 | } | |
1746 | ||
1747 | return res == 0; | |
dde80251 RG |
1748 | #endif /* !HAVE_SODIUM_MEMCMP */ |
1749 | #endif /* !HAVE_CRYPTO_MEMCMP */ | |
b2504b29 | 1750 | } |
d3190b7d RG |
1751 | |
1752 | namespace pdns | |
1753 | { | |
20b2f204 RG |
1754 | struct CloseDirDeleter |
1755 | { | |
07d4785d | 1756 | void operator()(DIR* dir) const noexcept { |
20b2f204 RG |
1757 | closedir(dir); |
1758 | } | |
1759 | }; | |
1760 | ||
d3190b7d RG |
1761 | std::optional<std::string> visit_directory(const std::string& directory, const std::function<bool(ino_t inodeNumber, const std::string_view& name)>& visitor) |
1762 | { | |
20b2f204 | 1763 | auto dirHandle = std::unique_ptr<DIR, CloseDirDeleter>(opendir(directory.c_str())); |
d3190b7d RG |
1764 | if (!dirHandle) { |
1765 | auto err = errno; | |
1766 | return std::string("Error opening directory '" + directory + "': " + stringerror(err)); | |
1767 | } | |
1768 | ||
1769 | bool keepGoing = true; | |
1770 | struct dirent* ent = nullptr; | |
1771 | // NOLINTNEXTLINE(concurrency-mt-unsafe): readdir is thread-safe nowadays and readdir_r is deprecated | |
1772 | while (keepGoing && (ent = readdir(dirHandle.get())) != nullptr) { | |
1773 | // NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-array-to-pointer-decay: dirent API | |
1774 | auto name = std::string_view(ent->d_name, strlen(ent->d_name)); | |
1775 | keepGoing = visitor(ent->d_ino, name); | |
1776 | } | |
1777 | ||
1778 | return std::nullopt; | |
1779 | } | |
b1564d45 RG |
1780 | |
1781 | UniqueFilePtr openFileForWriting(const std::string& filePath, mode_t permissions, bool mustNotExist, bool appendIfExists) | |
1782 | { | |
1783 | int flags = O_WRONLY | O_CREAT; | |
1784 | if (mustNotExist) { | |
1785 | flags |= O_EXCL; | |
1786 | } | |
1787 | else if (appendIfExists) { | |
1788 | flags |= O_APPEND; | |
1789 | } | |
1790 | int fileDesc = open(filePath.c_str(), flags, permissions); | |
1791 | if (fileDesc == -1) { | |
6e58535e | 1792 | return {}; |
b1564d45 RG |
1793 | } |
1794 | auto filePtr = pdns::UniqueFilePtr(fdopen(fileDesc, appendIfExists ? "a" : "w")); | |
1795 | if (!filePtr) { | |
1796 | auto error = errno; | |
1797 | close(fileDesc); | |
1798 | errno = error; | |
6e58535e | 1799 | return {}; |
b1564d45 RG |
1800 | } |
1801 | return filePtr; | |
1802 | } | |
1803 | ||
d3190b7d | 1804 | } |