1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.haxx.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22 #include "server_setup.h"
23
24 #ifdef HAVE_SIGNAL_H
25 #include <signal.h>
26 #endif
27 #ifdef HAVE_NETINET_IN_H
28 #include <netinet/in.h>
29 #endif
30 #ifdef _XOPEN_SOURCE_EXTENDED
31 /* This define is "almost" required to build on HPUX 11 */
32 #include <arpa/inet.h>
33 #endif
34 #ifdef HAVE_NETDB_H
35 #include <netdb.h>
36 #endif
37 #ifdef HAVE_POLL_H
38 #include <poll.h>
39 #elif defined(HAVE_SYS_POLL_H)
40 #include <sys/poll.h>
41 #endif
42 #ifdef __MINGW32__
43 #include <w32api.h>
44 #endif
45
46 #define ENABLE_CURLX_PRINTF
47 /* make the curlx header define all printf() functions to use the curlx_*
48 versions instead */
49 #include "curlx.h" /* from the private lib dir */
50 #include "getpart.h"
51 #include "util.h"
52 #include "timeval.h"
53
54 #ifdef USE_WINSOCK
55 #undef EINTR
56 #define EINTR 4 /* errno.h value */
57 #undef EINVAL
58 #define EINVAL 22 /* errno.h value */
59 #endif
60
61 /* MinGW with w32api version < 3.6 declared in6addr_any as extern,
62 but lacked the definition */
63 #if defined(ENABLE_IPV6) && defined(__MINGW32__)
64 #if (__W32API_MAJOR_VERSION < 3) || \
65 ((__W32API_MAJOR_VERSION == 3) && (__W32API_MINOR_VERSION < 6))
66 const struct in6_addr in6addr_any = {{ IN6ADDR_ANY_INIT }};
67 #endif /* w32api < 3.6 */
68 #endif /* ENABLE_IPV6 && __MINGW32__*/
69
70 static struct timeval tvnow(void);
71
72 /* This function returns a pointer to STATIC memory. It converts the given
73 * binary lump to a hex formatted string usable for output in logs or
74 * whatever.
75 */
data_to_hex(char * data,size_t len)76 char *data_to_hex(char *data, size_t len)
77 {
78 static char buf[256*3];
79 size_t i;
80 char *optr = buf;
81 char *iptr = data;
82
83 if(len > 255)
84 len = 255;
85
86 for(i = 0; i < len; i++) {
87 if((data[i] >= 0x20) && (data[i] < 0x7f))
88 *optr++ = *iptr++;
89 else {
90 msnprintf(optr, 4, "%%%02x", *iptr++);
91 optr += 3;
92 }
93 }
94 *optr = 0; /* in case no sprintf was used */
95
96 return buf;
97 }
98
logmsg(const char * msg,...)99 void logmsg(const char *msg, ...)
100 {
101 va_list ap;
102 char buffer[2048 + 1];
103 FILE *logfp;
104 struct timeval tv;
105 time_t sec;
106 struct tm *now;
107 char timebuf[20];
108 static time_t epoch_offset;
109 static int known_offset;
110
111 if(!serverlogfile) {
112 fprintf(stderr, "Error: serverlogfile not set\n");
113 return;
114 }
115
116 tv = tvnow();
117 if(!known_offset) {
118 epoch_offset = time(NULL) - tv.tv_sec;
119 known_offset = 1;
120 }
121 sec = epoch_offset + tv.tv_sec;
122 now = localtime(&sec); /* not thread safe but we don't care */
123
124 msnprintf(timebuf, sizeof(timebuf), "%02d:%02d:%02d.%06ld",
125 (int)now->tm_hour, (int)now->tm_min, (int)now->tm_sec,
126 (long)tv.tv_usec);
127
128 va_start(ap, msg);
129 mvsnprintf(buffer, sizeof(buffer), msg, ap);
130 va_end(ap);
131
132 logfp = fopen(serverlogfile, "ab");
133 if(logfp) {
134 fprintf(logfp, "%s %s\n", timebuf, buffer);
135 fclose(logfp);
136 }
137 else {
138 int error = errno;
139 fprintf(stderr, "fopen() failed with error: %d %s\n",
140 error, strerror(error));
141 fprintf(stderr, "Error opening file: %s\n", serverlogfile);
142 fprintf(stderr, "Msg not logged: %s %s\n", timebuf, buffer);
143 }
144 }
145
146 #ifdef WIN32
147 /* use instead of perror() on generic windows */
win32_perror(const char * msg)148 void win32_perror(const char *msg)
149 {
150 char buf[512];
151 DWORD err = SOCKERRNO;
152
153 if(!FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, err,
154 LANG_NEUTRAL, buf, sizeof(buf), NULL))
155 msnprintf(buf, sizeof(buf), "Unknown error %lu (%#lx)", err, err);
156 if(msg)
157 fprintf(stderr, "%s: ", msg);
158 fprintf(stderr, "%s\n", buf);
159 }
160 #endif /* WIN32 */
161
162 #ifdef USE_WINSOCK
win32_init(void)163 void win32_init(void)
164 {
165 WORD wVersionRequested;
166 WSADATA wsaData;
167 int err;
168 wVersionRequested = MAKEWORD(USE_WINSOCK, USE_WINSOCK);
169
170 err = WSAStartup(wVersionRequested, &wsaData);
171
172 if(err != 0) {
173 perror("Winsock init failed");
174 logmsg("Error initialising winsock -- aborting");
175 exit(1);
176 }
177
178 if(LOBYTE(wsaData.wVersion) != USE_WINSOCK ||
179 HIBYTE(wsaData.wVersion) != USE_WINSOCK) {
180 WSACleanup();
181 perror("Winsock init failed");
182 logmsg("No suitable winsock.dll found -- aborting");
183 exit(1);
184 }
185 }
186
win32_cleanup(void)187 void win32_cleanup(void)
188 {
189 WSACleanup();
190 }
191 #endif /* USE_WINSOCK */
192
193 /* set by the main code to point to where the test dir is */
194 const char *path = ".";
195
test2file(long testno)196 char *test2file(long testno)
197 {
198 static char filename[256];
199 msnprintf(filename, sizeof(filename), TEST_DATA_PATH, path, testno);
200 return filename;
201 }
202
203 /*
204 * Portable function used for waiting a specific amount of ms.
205 * Waiting indefinitely with this function is not allowed, a
206 * zero or negative timeout value will return immediately.
207 *
208 * Return values:
209 * -1 = system call error, or invalid timeout value
210 * 0 = specified timeout has elapsed
211 */
wait_ms(int timeout_ms)212 int wait_ms(int timeout_ms)
213 {
214 #if !defined(MSDOS) && !defined(USE_WINSOCK)
215 #ifndef HAVE_POLL_FINE
216 struct timeval pending_tv;
217 #endif
218 struct timeval initial_tv;
219 int pending_ms;
220 #endif
221 int r = 0;
222
223 if(!timeout_ms)
224 return 0;
225 if(timeout_ms < 0) {
226 errno = EINVAL;
227 return -1;
228 }
229 #if defined(MSDOS)
230 delay(timeout_ms);
231 #elif defined(USE_WINSOCK)
232 Sleep(timeout_ms);
233 #else
234 pending_ms = timeout_ms;
235 initial_tv = tvnow();
236 do {
237 int error;
238 #if defined(HAVE_POLL_FINE)
239 r = poll(NULL, 0, pending_ms);
240 #else
241 pending_tv.tv_sec = pending_ms / 1000;
242 pending_tv.tv_usec = (pending_ms % 1000) * 1000;
243 r = select(0, NULL, NULL, NULL, &pending_tv);
244 #endif /* HAVE_POLL_FINE */
245 if(r != -1)
246 break;
247 error = errno;
248 if(error && (error != EINTR))
249 break;
250 pending_ms = timeout_ms - (int)timediff(tvnow(), initial_tv);
251 if(pending_ms <= 0)
252 break;
253 } while(r == -1);
254 #endif /* USE_WINSOCK */
255 if(r)
256 r = -1;
257 return r;
258 }
259
write_pidfile(const char * filename)260 int write_pidfile(const char *filename)
261 {
262 FILE *pidfile;
263 long pid;
264
265 pid = (long)getpid();
266 pidfile = fopen(filename, "wb");
267 if(!pidfile) {
268 logmsg("Couldn't write pid file: %s %s", filename, strerror(errno));
269 return 0; /* fail */
270 }
271 fprintf(pidfile, "%ld\n", pid);
272 fclose(pidfile);
273 logmsg("Wrote pid %ld to %s", pid, filename);
274 return 1; /* success */
275 }
276
set_advisor_read_lock(const char * filename)277 void set_advisor_read_lock(const char *filename)
278 {
279 FILE *lockfile;
280 int error = 0;
281 int res;
282
283 do {
284 lockfile = fopen(filename, "wb");
285 } while((lockfile == NULL) && ((error = errno) == EINTR));
286 if(lockfile == NULL) {
287 logmsg("Error creating lock file %s error: %d %s",
288 filename, error, strerror(error));
289 return;
290 }
291
292 do {
293 res = fclose(lockfile);
294 } while(res && ((error = errno) == EINTR));
295 if(res)
296 logmsg("Error closing lock file %s error: %d %s",
297 filename, error, strerror(error));
298 }
299
clear_advisor_read_lock(const char * filename)300 void clear_advisor_read_lock(const char *filename)
301 {
302 int error = 0;
303 int res;
304
305 /*
306 ** Log all removal failures. Even those due to file not existing.
307 ** This allows to detect if unexpectedly the file has already been
308 ** removed by a process different than the one that should do this.
309 */
310
311 do {
312 res = unlink(filename);
313 } while(res && ((error = errno) == EINTR));
314 if(res)
315 logmsg("Error removing lock file %s error: %d %s",
316 filename, error, strerror(error));
317 }
318
319
320 /* Portable, consistent toupper (remember EBCDIC). Do not use toupper() because
321 its behavior is altered by the current locale. */
raw_toupper(char in)322 static char raw_toupper(char in)
323 {
324 #if !defined(CURL_DOES_CONVERSIONS)
325 if(in >= 'a' && in <= 'z')
326 return (char)('A' + in - 'a');
327 #else
328 switch(in) {
329 case 'a':
330 return 'A';
331 case 'b':
332 return 'B';
333 case 'c':
334 return 'C';
335 case 'd':
336 return 'D';
337 case 'e':
338 return 'E';
339 case 'f':
340 return 'F';
341 case 'g':
342 return 'G';
343 case 'h':
344 return 'H';
345 case 'i':
346 return 'I';
347 case 'j':
348 return 'J';
349 case 'k':
350 return 'K';
351 case 'l':
352 return 'L';
353 case 'm':
354 return 'M';
355 case 'n':
356 return 'N';
357 case 'o':
358 return 'O';
359 case 'p':
360 return 'P';
361 case 'q':
362 return 'Q';
363 case 'r':
364 return 'R';
365 case 's':
366 return 'S';
367 case 't':
368 return 'T';
369 case 'u':
370 return 'U';
371 case 'v':
372 return 'V';
373 case 'w':
374 return 'W';
375 case 'x':
376 return 'X';
377 case 'y':
378 return 'Y';
379 case 'z':
380 return 'Z';
381 }
382 #endif
383
384 return in;
385 }
386
strncasecompare(const char * first,const char * second,size_t max)387 int strncasecompare(const char *first, const char *second, size_t max)
388 {
389 while(*first && *second && max) {
390 if(raw_toupper(*first) != raw_toupper(*second)) {
391 break;
392 }
393 max--;
394 first++;
395 second++;
396 }
397 if(0 == max)
398 return 1; /* they are equal this far */
399
400 return raw_toupper(*first) == raw_toupper(*second);
401 }
402
403 #if defined(WIN32) && !defined(MSDOS)
404
tvnow(void)405 static struct timeval tvnow(void)
406 {
407 /*
408 ** GetTickCount() is available on _all_ Windows versions from W95 up
409 ** to nowadays. Returns milliseconds elapsed since last system boot,
410 ** increases monotonically and wraps once 49.7 days have elapsed.
411 **
412 ** GetTickCount64() is available on Windows version from Windows Vista
413 ** and Windows Server 2008 up to nowadays. The resolution of the
414 ** function is limited to the resolution of the system timer, which
415 ** is typically in the range of 10 milliseconds to 16 milliseconds.
416 */
417 struct timeval now;
418 #if defined(_WIN32_WINNT) && (_WIN32_WINNT >= 0x0600) && \
419 (!defined(__MINGW32__) || defined(__MINGW64_VERSION_MAJOR))
420 ULONGLONG milliseconds = GetTickCount64();
421 #else
422 DWORD milliseconds = GetTickCount();
423 #endif
424 now.tv_sec = (long)(milliseconds / 1000);
425 now.tv_usec = (long)((milliseconds % 1000) * 1000);
426 return now;
427 }
428
429 #elif defined(HAVE_CLOCK_GETTIME_MONOTONIC)
430
tvnow(void)431 static struct timeval tvnow(void)
432 {
433 /*
434 ** clock_gettime() is granted to be increased monotonically when the
435 ** monotonic clock is queried. Time starting point is unspecified, it
436 ** could be the system start-up time, the Epoch, or something else,
437 ** in any case the time starting point does not change once that the
438 ** system has started up.
439 */
440 struct timeval now;
441 struct timespec tsnow;
442 if(0 == clock_gettime(CLOCK_MONOTONIC, &tsnow)) {
443 now.tv_sec = tsnow.tv_sec;
444 now.tv_usec = tsnow.tv_nsec / 1000;
445 }
446 /*
447 ** Even when the configure process has truly detected monotonic clock
448 ** availability, it might happen that it is not actually available at
449 ** run-time. When this occurs simply fallback to other time source.
450 */
451 #ifdef HAVE_GETTIMEOFDAY
452 else
453 (void)gettimeofday(&now, NULL);
454 #else
455 else {
456 now.tv_sec = (long)time(NULL);
457 now.tv_usec = 0;
458 }
459 #endif
460 return now;
461 }
462
463 #elif defined(HAVE_GETTIMEOFDAY)
464
tvnow(void)465 static struct timeval tvnow(void)
466 {
467 /*
468 ** gettimeofday() is not granted to be increased monotonically, due to
469 ** clock drifting and external source time synchronization it can jump
470 ** forward or backward in time.
471 */
472 struct timeval now;
473 (void)gettimeofday(&now, NULL);
474 return now;
475 }
476
477 #else
478
tvnow(void)479 static struct timeval tvnow(void)
480 {
481 /*
482 ** time() returns the value of time in seconds since the Epoch.
483 */
484 struct timeval now;
485 now.tv_sec = (long)time(NULL);
486 now.tv_usec = 0;
487 return now;
488 }
489
490 #endif
491
timediff(struct timeval newer,struct timeval older)492 long timediff(struct timeval newer, struct timeval older)
493 {
494 timediff_t diff = newer.tv_sec-older.tv_sec;
495 if(diff >= (LONG_MAX/1000))
496 return LONG_MAX;
497 else if(diff <= (LONG_MIN/1000))
498 return LONG_MIN;
499 return (long)(newer.tv_sec-older.tv_sec)*1000+
500 (long)(newer.tv_usec-older.tv_usec)/1000;
501 }
502