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