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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
84e51726 | 2 | |
84e51726 | 3 | #include <errno.h> |
84e51726 | 4 | #include <math.h> |
84e51726 LP |
5 | #include <netinet/in.h> |
6 | #include <netinet/ip.h> | |
07630cea LP |
7 | #include <resolv.h> |
8 | #include <stdlib.h> | |
9 | #include <sys/socket.h> | |
84e51726 LP |
10 | #include <sys/timerfd.h> |
11 | #include <sys/timex.h> | |
84e51726 | 12 | #include <sys/types.h> |
07630cea LP |
13 | #include <time.h> |
14 | ||
15 | #include "sd-daemon.h" | |
84e51726 | 16 | |
b5efdb8a | 17 | #include "alloc-util.h" |
dcb37458 | 18 | #include "dns-domain.h" |
3ffd4af2 | 19 | #include "fd-util.h" |
f4f15635 | 20 | #include "fs-util.h" |
84e51726 | 21 | #include "list.h" |
07630cea LP |
22 | #include "log.h" |
23 | #include "missing.h" | |
24 | #include "network-util.h" | |
84e51726 | 25 | #include "ratelimit.h" |
07630cea | 26 | #include "socket-util.h" |
07630cea | 27 | #include "string-util.h" |
84e51726 | 28 | #include "strv.h" |
07630cea | 29 | #include "time-util.h" |
84e51726 LP |
30 | #include "timesyncd-conf.h" |
31 | #include "timesyncd-manager.h" | |
3ffd4af2 | 32 | #include "util.h" |
84e51726 LP |
33 | |
34 | #ifndef ADJ_SETOFFSET | |
35 | #define ADJ_SETOFFSET 0x0100 /* add 'time' to current time */ | |
36 | #endif | |
37 | ||
38 | /* expected accuracy of time synchronization; used to adjust the poll interval */ | |
39 | #define NTP_ACCURACY_SEC 0.2 | |
40 | ||
84e51726 LP |
41 | /* |
42 | * Maximum delta in seconds which the system clock is gradually adjusted | |
a4465d0d | 43 | * (slewed) to approach the network time. Deltas larger that this are set by |
84e51726 LP |
44 | * letting the system time jump. The kernel's limit for adjtime is 0.5s. |
45 | */ | |
46 | #define NTP_MAX_ADJUST 0.4 | |
47 | ||
a4465d0d | 48 | /* Default of maximum acceptable root distance in microseconds. */ |
f907cc16 | 49 | #define NTP_MAX_ROOT_DISTANCE (5 * USEC_PER_SEC) |
3af0442c | 50 | |
e8206972 ML |
51 | /* Maximum number of missed replies before selecting another source. */ |
52 | #define NTP_MAX_MISSED_REPLIES 2 | |
53 | ||
84e51726 LP |
54 | #define RETRY_USEC (30*USEC_PER_SEC) |
55 | #define RATELIMIT_INTERVAL_USEC (10*USEC_PER_SEC) | |
56 | #define RATELIMIT_BURST 10 | |
57 | ||
58 | #define TIMEOUT_USEC (10*USEC_PER_SEC) | |
59 | ||
84e51726 LP |
60 | static int manager_arm_timer(Manager *m, usec_t next); |
61 | static int manager_clock_watch_setup(Manager *m); | |
7b628891 | 62 | static int manager_listen_setup(Manager *m); |
f89c4e15 | 63 | static void manager_listen_stop(Manager *m); |
84e51726 | 64 | |
3af0442c ML |
65 | static double ntp_ts_short_to_d(const struct ntp_ts_short *ts) { |
66 | return be16toh(ts->sec) + (be16toh(ts->frac) / 65536.0); | |
67 | } | |
68 | ||
84e51726 LP |
69 | static double ntp_ts_to_d(const struct ntp_ts *ts) { |
70 | return be32toh(ts->sec) + ((double)be32toh(ts->frac) / UINT_MAX); | |
71 | } | |
72 | ||
73 | static double ts_to_d(const struct timespec *ts) { | |
74 | return ts->tv_sec + (1.0e-9 * ts->tv_nsec); | |
75 | } | |
76 | ||
84e51726 LP |
77 | static int manager_timeout(sd_event_source *source, usec_t usec, void *userdata) { |
78 | _cleanup_free_ char *pretty = NULL; | |
79 | Manager *m = userdata; | |
80 | ||
81 | assert(m); | |
82 | assert(m->current_server_name); | |
83 | assert(m->current_server_address); | |
84 | ||
85 | server_address_pretty(m->current_server_address, &pretty); | |
86 | log_info("Timed out waiting for reply from %s (%s).", strna(pretty), m->current_server_name->string); | |
87 | ||
88 | return manager_connect(m); | |
89 | } | |
90 | ||
91 | static int manager_send_request(Manager *m) { | |
92 | _cleanup_free_ char *pretty = NULL; | |
93 | struct ntp_msg ntpmsg = { | |
94 | /* | |
95 | * "The client initializes the NTP message header, sends the request | |
96 | * to the server, and strips the time of day from the Transmit | |
97 | * Timestamp field of the reply. For this purpose, all the NTP | |
98 | * header fields are set to 0, except the Mode, VN, and optional | |
99 | * Transmit Timestamp fields." | |
100 | */ | |
101 | .field = NTP_FIELD(0, 4, NTP_MODE_CLIENT), | |
102 | }; | |
103 | ssize_t len; | |
104 | int r; | |
105 | ||
106 | assert(m); | |
107 | assert(m->current_server_name); | |
108 | assert(m->current_server_address); | |
109 | ||
110 | m->event_timeout = sd_event_source_unref(m->event_timeout); | |
111 | ||
f89c4e15 LP |
112 | r = manager_listen_setup(m); |
113 | if (r < 0) | |
114 | return log_warning_errno(r, "Failed to setup connection socket: %m"); | |
7b628891 | 115 | |
84e51726 LP |
116 | /* |
117 | * Set transmit timestamp, remember it; the server will send that back | |
118 | * as the origin timestamp and we have an indication that this is the | |
119 | * matching answer to our request. | |
120 | * | |
121 | * The actual value does not matter, We do not care about the correct | |
122 | * NTP UINT_MAX fraction; we just pass the plain nanosecond value. | |
123 | */ | |
124 | assert_se(clock_gettime(clock_boottime_or_monotonic(), &m->trans_time_mon) >= 0); | |
125 | assert_se(clock_gettime(CLOCK_REALTIME, &m->trans_time) >= 0); | |
126 | ntpmsg.trans_time.sec = htobe32(m->trans_time.tv_sec + OFFSET_1900_1970); | |
127 | ntpmsg.trans_time.frac = htobe32(m->trans_time.tv_nsec); | |
128 | ||
129 | server_address_pretty(m->current_server_address, &pretty); | |
130 | ||
131 | len = sendto(m->server_socket, &ntpmsg, sizeof(ntpmsg), MSG_DONTWAIT, &m->current_server_address->sockaddr.sa, m->current_server_address->socklen); | |
132 | if (len == sizeof(ntpmsg)) { | |
133 | m->pending = true; | |
134 | log_debug("Sent NTP request to %s (%s).", strna(pretty), m->current_server_name->string); | |
135 | } else { | |
56f64d95 | 136 | log_debug_errno(errno, "Sending NTP request to %s (%s) failed: %m", strna(pretty), m->current_server_name->string); |
84e51726 LP |
137 | return manager_connect(m); |
138 | } | |
139 | ||
ab4df227 KS |
140 | /* re-arm timer with increasing timeout, in case the packets never arrive back */ |
141 | if (m->retry_interval > 0) { | |
a4465d0d | 142 | if (m->retry_interval < m->poll_interval_max_usec) |
ab4df227 KS |
143 | m->retry_interval *= 2; |
144 | } else | |
a4465d0d | 145 | m->retry_interval = m->poll_interval_min_usec; |
ab4df227 KS |
146 | |
147 | r = manager_arm_timer(m, m->retry_interval); | |
f647962d MS |
148 | if (r < 0) |
149 | return log_error_errno(r, "Failed to rearm timer: %m"); | |
ab4df227 | 150 | |
e8206972 ML |
151 | m->missed_replies++; |
152 | if (m->missed_replies > NTP_MAX_MISSED_REPLIES) { | |
153 | r = sd_event_add_time( | |
154 | m->event, | |
155 | &m->event_timeout, | |
156 | clock_boottime_or_monotonic(), | |
157 | now(clock_boottime_or_monotonic()) + TIMEOUT_USEC, 0, | |
158 | manager_timeout, m); | |
f647962d MS |
159 | if (r < 0) |
160 | return log_error_errno(r, "Failed to arm timeout timer: %m"); | |
84e51726 LP |
161 | } |
162 | ||
163 | return 0; | |
164 | } | |
165 | ||
166 | static int manager_timer(sd_event_source *source, usec_t usec, void *userdata) { | |
167 | Manager *m = userdata; | |
168 | ||
169 | assert(m); | |
170 | ||
171 | return manager_send_request(m); | |
172 | } | |
173 | ||
174 | static int manager_arm_timer(Manager *m, usec_t next) { | |
175 | int r; | |
176 | ||
177 | assert(m); | |
84e51726 LP |
178 | |
179 | if (next == 0) { | |
180 | m->event_timer = sd_event_source_unref(m->event_timer); | |
181 | return 0; | |
182 | } | |
183 | ||
184 | if (m->event_timer) { | |
185 | r = sd_event_source_set_time(m->event_timer, now(clock_boottime_or_monotonic()) + next); | |
186 | if (r < 0) | |
187 | return r; | |
188 | ||
189 | return sd_event_source_set_enabled(m->event_timer, SD_EVENT_ONESHOT); | |
190 | } | |
191 | ||
192 | return sd_event_add_time( | |
193 | m->event, | |
194 | &m->event_timer, | |
195 | clock_boottime_or_monotonic(), | |
196 | now(clock_boottime_or_monotonic()) + next, 0, | |
197 | manager_timer, m); | |
198 | } | |
199 | ||
200 | static int manager_clock_watch(sd_event_source *source, int fd, uint32_t revents, void *userdata) { | |
201 | Manager *m = userdata; | |
202 | ||
203 | assert(m); | |
204 | ||
205 | /* rearm timer */ | |
206 | manager_clock_watch_setup(m); | |
207 | ||
208 | /* skip our own jumps */ | |
209 | if (m->jumped) { | |
210 | m->jumped = false; | |
211 | return 0; | |
212 | } | |
213 | ||
214 | /* resync */ | |
7e3254b3 | 215 | log_debug("System time changed. Resyncing."); |
84e51726 LP |
216 | m->poll_resync = true; |
217 | ||
218 | return manager_send_request(m); | |
219 | } | |
220 | ||
221 | /* wake up when the system time changes underneath us */ | |
222 | static int manager_clock_watch_setup(Manager *m) { | |
84e51726 LP |
223 | int r; |
224 | ||
225 | assert(m); | |
226 | ||
227 | m->event_clock_watch = sd_event_source_unref(m->event_clock_watch); | |
228 | safe_close(m->clock_watch_fd); | |
229 | ||
4f811d27 | 230 | m->clock_watch_fd = time_change_fd(); |
4a62c710 | 231 | if (m->clock_watch_fd < 0) |
4f811d27 | 232 | return log_error_errno(m->clock_watch_fd, "Failed to create timerfd: %m"); |
84e51726 LP |
233 | |
234 | r = sd_event_add_io(m->event, &m->event_clock_watch, m->clock_watch_fd, EPOLLIN, manager_clock_watch, m); | |
f647962d MS |
235 | if (r < 0) |
236 | return log_error_errno(r, "Failed to create clock watch event source: %m"); | |
84e51726 LP |
237 | |
238 | return 0; | |
239 | } | |
240 | ||
241 | static int manager_adjust_clock(Manager *m, double offset, int leap_sec) { | |
242 | struct timex tmx = {}; | |
243 | int r; | |
244 | ||
245 | assert(m); | |
246 | ||
247 | /* | |
248 | * For small deltas, tell the kernel to gradually adjust the system | |
249 | * clock to the NTP time, larger deltas are just directly set. | |
250 | */ | |
251 | if (fabs(offset) < NTP_MAX_ADJUST) { | |
252 | tmx.modes = ADJ_STATUS | ADJ_NANO | ADJ_OFFSET | ADJ_TIMECONST | ADJ_MAXERROR | ADJ_ESTERROR; | |
253 | tmx.status = STA_PLL; | |
254 | tmx.offset = offset * NSEC_PER_SEC; | |
255 | tmx.constant = log2i(m->poll_interval_usec / USEC_PER_SEC) - 4; | |
256 | tmx.maxerror = 0; | |
257 | tmx.esterror = 0; | |
ff49bc32 | 258 | log_debug(" adjust (slew): %+.3f sec", offset); |
84e51726 | 259 | } else { |
5f36e3d3 | 260 | tmx.modes = ADJ_STATUS | ADJ_NANO | ADJ_SETOFFSET | ADJ_MAXERROR | ADJ_ESTERROR; |
84e51726 LP |
261 | |
262 | /* ADJ_NANO uses nanoseconds in the microseconds field */ | |
263 | tmx.time.tv_sec = (long)offset; | |
264 | tmx.time.tv_usec = (offset - tmx.time.tv_sec) * NSEC_PER_SEC; | |
5f36e3d3 AK |
265 | tmx.maxerror = 0; |
266 | tmx.esterror = 0; | |
84e51726 LP |
267 | |
268 | /* the kernel expects -0.3s as {-1, 7000.000.000} */ | |
269 | if (tmx.time.tv_usec < 0) { | |
270 | tmx.time.tv_sec -= 1; | |
271 | tmx.time.tv_usec += NSEC_PER_SEC; | |
272 | } | |
273 | ||
274 | m->jumped = true; | |
ff49bc32 | 275 | log_debug(" adjust (jump): %+.3f sec", offset); |
84e51726 LP |
276 | } |
277 | ||
278 | /* | |
279 | * An unset STA_UNSYNC will enable the kernel's 11-minute mode, | |
280 | * which syncs the system time periodically to the RTC. | |
281 | * | |
282 | * In case the RTC runs in local time, never touch the RTC, | |
283 | * we have no way to properly handle daylight saving changes and | |
284 | * mobile devices moving between time zones. | |
285 | */ | |
286 | if (m->rtc_local_time) | |
287 | tmx.status |= STA_UNSYNC; | |
288 | ||
289 | switch (leap_sec) { | |
290 | case 1: | |
291 | tmx.status |= STA_INS; | |
292 | break; | |
293 | case -1: | |
294 | tmx.status |= STA_DEL; | |
295 | break; | |
296 | } | |
297 | ||
298 | r = clock_adjtime(CLOCK_REALTIME, &tmx); | |
299 | if (r < 0) | |
6ff6f4d8 | 300 | return -errno; |
84e51726 | 301 | |
baa33e79 | 302 | /* If touch fails, there isn't much we can do. Maybe it'll work next time. */ |
53d133ea | 303 | (void) touch("/var/lib/systemd/timesync/clock"); |
2dd79846 | 304 | (void) touch("/run/systemd/timesync/synchronized"); |
84e51726 | 305 | |
66086a40 | 306 | m->drift_freq = tmx.freq; |
84e51726 LP |
307 | |
308 | log_debug(" status : %04i %s\n" | |
0060bb8f | 309 | " time now : %"PRI_TIME".%03"PRI_USEC"\n" |
3bd7ef83 | 310 | " constant : %"PRI_TIMEX"\n" |
84e51726 | 311 | " offset : %+.3f sec\n" |
66086a40 | 312 | " freq offset : %+"PRI_TIMEX" (%+"PRI_TIMEX" ppm)\n", |
84e51726 | 313 | tmx.status, tmx.status & STA_UNSYNC ? "unsync" : "sync", |
70887c5f | 314 | tmx.time.tv_sec, tmx.time.tv_usec / NSEC_PER_MSEC, |
84e51726 LP |
315 | tmx.constant, |
316 | (double)tmx.offset / NSEC_PER_SEC, | |
66086a40 | 317 | tmx.freq, tmx.freq / 65536); |
84e51726 LP |
318 | |
319 | return 0; | |
320 | } | |
321 | ||
322 | static bool manager_sample_spike_detection(Manager *m, double offset, double delay) { | |
323 | unsigned int i, idx_cur, idx_new, idx_min; | |
324 | double jitter; | |
325 | double j; | |
326 | ||
327 | assert(m); | |
328 | ||
329 | m->packet_count++; | |
330 | ||
331 | /* ignore initial sample */ | |
332 | if (m->packet_count == 1) | |
333 | return false; | |
334 | ||
335 | /* store the current data in our samples array */ | |
336 | idx_cur = m->samples_idx; | |
337 | idx_new = (idx_cur + 1) % ELEMENTSOF(m->samples); | |
338 | m->samples_idx = idx_new; | |
339 | m->samples[idx_new].offset = offset; | |
340 | m->samples[idx_new].delay = delay; | |
341 | ||
342 | /* calculate new jitter value from the RMS differences relative to the lowest delay sample */ | |
343 | jitter = m->samples_jitter; | |
344 | for (idx_min = idx_cur, i = 0; i < ELEMENTSOF(m->samples); i++) | |
345 | if (m->samples[i].delay > 0 && m->samples[i].delay < m->samples[idx_min].delay) | |
346 | idx_min = i; | |
347 | ||
348 | j = 0; | |
349 | for (i = 0; i < ELEMENTSOF(m->samples); i++) | |
fa66b606 | 350 | j += pow(m->samples[i].offset - m->samples[idx_min].offset, 2); |
84e51726 LP |
351 | m->samples_jitter = sqrt(j / (ELEMENTSOF(m->samples) - 1)); |
352 | ||
353 | /* ignore samples when resyncing */ | |
354 | if (m->poll_resync) | |
355 | return false; | |
356 | ||
357 | /* always accept offset if we are farther off than the round-trip delay */ | |
358 | if (fabs(offset) > delay) | |
359 | return false; | |
360 | ||
361 | /* we need a few samples before looking at them */ | |
362 | if (m->packet_count < 4) | |
363 | return false; | |
364 | ||
365 | /* do not accept anything worse than the maximum possible error of the best sample */ | |
366 | if (fabs(offset) > m->samples[idx_min].delay) | |
367 | return true; | |
368 | ||
369 | /* compare the difference between the current offset to the previous offset and jitter */ | |
370 | return fabs(offset - m->samples[idx_cur].offset) > 3 * jitter; | |
371 | } | |
372 | ||
373 | static void manager_adjust_poll(Manager *m, double offset, bool spike) { | |
374 | assert(m); | |
375 | ||
376 | if (m->poll_resync) { | |
a4465d0d | 377 | m->poll_interval_usec = m->poll_interval_min_usec; |
84e51726 LP |
378 | m->poll_resync = false; |
379 | return; | |
380 | } | |
381 | ||
382 | /* set to minimal poll interval */ | |
383 | if (!spike && fabs(offset) > NTP_ACCURACY_SEC) { | |
a4465d0d | 384 | m->poll_interval_usec = m->poll_interval_min_usec; |
84e51726 LP |
385 | return; |
386 | } | |
387 | ||
388 | /* increase polling interval */ | |
389 | if (fabs(offset) < NTP_ACCURACY_SEC * 0.25) { | |
a4465d0d | 390 | if (m->poll_interval_usec < m->poll_interval_max_usec) |
84e51726 LP |
391 | m->poll_interval_usec *= 2; |
392 | return; | |
393 | } | |
394 | ||
395 | /* decrease polling interval */ | |
396 | if (spike || fabs(offset) > NTP_ACCURACY_SEC * 0.75) { | |
a4465d0d | 397 | if (m->poll_interval_usec > m->poll_interval_min_usec) |
84e51726 LP |
398 | m->poll_interval_usec /= 2; |
399 | return; | |
400 | } | |
401 | } | |
402 | ||
403 | static int manager_receive_response(sd_event_source *source, int fd, uint32_t revents, void *userdata) { | |
404 | Manager *m = userdata; | |
405 | struct ntp_msg ntpmsg; | |
406 | ||
407 | struct iovec iov = { | |
408 | .iov_base = &ntpmsg, | |
409 | .iov_len = sizeof(ntpmsg), | |
410 | }; | |
411 | union { | |
412 | struct cmsghdr cmsghdr; | |
413 | uint8_t buf[CMSG_SPACE(sizeof(struct timeval))]; | |
414 | } control; | |
415 | union sockaddr_union server_addr; | |
416 | struct msghdr msghdr = { | |
417 | .msg_iov = &iov, | |
418 | .msg_iovlen = 1, | |
419 | .msg_control = &control, | |
420 | .msg_controllen = sizeof(control), | |
421 | .msg_name = &server_addr, | |
422 | .msg_namelen = sizeof(server_addr), | |
423 | }; | |
424 | struct cmsghdr *cmsg; | |
1cc6c93a | 425 | struct timespec *recv_time = NULL; |
84e51726 LP |
426 | ssize_t len; |
427 | double origin, receive, trans, dest; | |
428 | double delay, offset; | |
3af0442c | 429 | double root_distance; |
84e51726 LP |
430 | bool spike; |
431 | int leap_sec; | |
432 | int r; | |
433 | ||
434 | assert(source); | |
435 | assert(m); | |
436 | ||
437 | if (revents & (EPOLLHUP|EPOLLERR)) { | |
438 | log_warning("Server connection returned error."); | |
439 | return manager_connect(m); | |
440 | } | |
441 | ||
a38d9945 | 442 | len = recvmsg(fd, &msghdr, MSG_DONTWAIT); |
84e51726 LP |
443 | if (len < 0) { |
444 | if (errno == EAGAIN) | |
445 | return 0; | |
446 | ||
447 | log_warning("Error receiving message. Disconnecting."); | |
448 | return manager_connect(m); | |
449 | } | |
450 | ||
43fcd650 TM |
451 | /* Too short or too long packet? */ |
452 | if (iov.iov_len < sizeof(struct ntp_msg) || (msghdr.msg_flags & MSG_TRUNC)) { | |
84e51726 LP |
453 | log_warning("Invalid response from server. Disconnecting."); |
454 | return manager_connect(m); | |
455 | } | |
456 | ||
457 | if (!m->current_server_name || | |
458 | !m->current_server_address || | |
459 | !sockaddr_equal(&server_addr, &m->current_server_address->sockaddr)) { | |
460 | log_debug("Response from unknown server."); | |
461 | return 0; | |
462 | } | |
463 | ||
2a1288ff | 464 | CMSG_FOREACH(cmsg, &msghdr) { |
84e51726 LP |
465 | if (cmsg->cmsg_level != SOL_SOCKET) |
466 | continue; | |
467 | ||
468 | switch (cmsg->cmsg_type) { | |
487a3682 ML |
469 | case SCM_TIMESTAMPNS: |
470 | recv_time = (struct timespec *) CMSG_DATA(cmsg); | |
84e51726 LP |
471 | break; |
472 | } | |
473 | } | |
474 | if (!recv_time) { | |
475 | log_error("Invalid packet timestamp."); | |
476 | return -EINVAL; | |
477 | } | |
478 | ||
479 | if (!m->pending) { | |
480 | log_debug("Unexpected reply. Ignoring."); | |
481 | return 0; | |
482 | } | |
483 | ||
e8206972 ML |
484 | m->missed_replies = 0; |
485 | ||
84e51726 LP |
486 | /* check our "time cookie" (we just stored nanoseconds in the fraction field) */ |
487 | if (be32toh(ntpmsg.origin_time.sec) != m->trans_time.tv_sec + OFFSET_1900_1970 || | |
edd50d5e | 488 | be32toh(ntpmsg.origin_time.frac) != (unsigned long) m->trans_time.tv_nsec) { |
84e51726 LP |
489 | log_debug("Invalid reply; not our transmit time. Ignoring."); |
490 | return 0; | |
491 | } | |
492 | ||
493 | m->event_timeout = sd_event_source_unref(m->event_timeout); | |
494 | ||
495 | if (be32toh(ntpmsg.recv_time.sec) < TIME_EPOCH + OFFSET_1900_1970 || | |
496 | be32toh(ntpmsg.trans_time.sec) < TIME_EPOCH + OFFSET_1900_1970) { | |
497 | log_debug("Invalid reply, returned times before epoch. Ignoring."); | |
498 | return manager_connect(m); | |
499 | } | |
500 | ||
07610e10 ML |
501 | if (NTP_FIELD_LEAP(ntpmsg.field) == NTP_LEAP_NOTINSYNC || |
502 | ntpmsg.stratum == 0 || ntpmsg.stratum >= 16) { | |
84e51726 LP |
503 | log_debug("Server is not synchronized. Disconnecting."); |
504 | return manager_connect(m); | |
505 | } | |
506 | ||
507 | if (!IN_SET(NTP_FIELD_VERSION(ntpmsg.field), 3, 4)) { | |
508 | log_debug("Response NTPv%d. Disconnecting.", NTP_FIELD_VERSION(ntpmsg.field)); | |
509 | return manager_connect(m); | |
510 | } | |
511 | ||
512 | if (NTP_FIELD_MODE(ntpmsg.field) != NTP_MODE_SERVER) { | |
513 | log_debug("Unsupported mode %d. Disconnecting.", NTP_FIELD_MODE(ntpmsg.field)); | |
514 | return manager_connect(m); | |
515 | } | |
516 | ||
3af0442c | 517 | root_distance = ntp_ts_short_to_d(&ntpmsg.root_delay) / 2 + ntp_ts_short_to_d(&ntpmsg.root_dispersion); |
f907cc16 | 518 | if (root_distance > (double) m->max_root_distance_usec / (double) USEC_PER_SEC) { |
3af0442c ML |
519 | log_debug("Server has too large root distance. Disconnecting."); |
520 | return manager_connect(m); | |
521 | } | |
522 | ||
84e51726 LP |
523 | /* valid packet */ |
524 | m->pending = false; | |
ab4df227 | 525 | m->retry_interval = 0; |
84e51726 | 526 | |
7b628891 | 527 | /* Stop listening */ |
f89c4e15 | 528 | manager_listen_stop(m); |
7b628891 | 529 | |
84e51726 LP |
530 | /* announce leap seconds */ |
531 | if (NTP_FIELD_LEAP(ntpmsg.field) & NTP_LEAP_PLUSSEC) | |
532 | leap_sec = 1; | |
533 | else if (NTP_FIELD_LEAP(ntpmsg.field) & NTP_LEAP_MINUSSEC) | |
534 | leap_sec = -1; | |
535 | else | |
536 | leap_sec = 0; | |
537 | ||
538 | /* | |
539 | * "Timestamp Name ID When Generated | |
540 | * ------------------------------------------------------------ | |
541 | * Originate Timestamp T1 time request sent by client | |
542 | * Receive Timestamp T2 time request received by server | |
543 | * Transmit Timestamp T3 time reply sent by server | |
544 | * Destination Timestamp T4 time reply received by client | |
545 | * | |
546 | * The round-trip delay, d, and system clock offset, t, are defined as: | |
547 | * d = (T4 - T1) - (T3 - T2) t = ((T2 - T1) + (T3 - T4)) / 2" | |
548 | */ | |
73c76e63 | 549 | origin = ts_to_d(&m->trans_time) + OFFSET_1900_1970; |
84e51726 LP |
550 | receive = ntp_ts_to_d(&ntpmsg.recv_time); |
551 | trans = ntp_ts_to_d(&ntpmsg.trans_time); | |
487a3682 | 552 | dest = ts_to_d(recv_time) + OFFSET_1900_1970; |
84e51726 LP |
553 | |
554 | offset = ((receive - origin) + (trans - dest)) / 2; | |
555 | delay = (dest - origin) - (trans - receive); | |
556 | ||
557 | spike = manager_sample_spike_detection(m, offset, delay); | |
558 | ||
559 | manager_adjust_poll(m, offset, spike); | |
560 | ||
561 | log_debug("NTP response:\n" | |
562 | " leap : %u\n" | |
563 | " version : %u\n" | |
564 | " mode : %u\n" | |
565 | " stratum : %u\n" | |
566 | " precision : %.6f sec (%d)\n" | |
3af0442c | 567 | " root distance: %.6f sec\n" |
84e51726 LP |
568 | " reference : %.4s\n" |
569 | " origin : %.3f\n" | |
570 | " receive : %.3f\n" | |
571 | " transmit : %.3f\n" | |
572 | " dest : %.3f\n" | |
573 | " offset : %+.3f sec\n" | |
574 | " delay : %+.3f sec\n" | |
575 | " packet count : %"PRIu64"\n" | |
576 | " jitter : %.3f%s\n" | |
577 | " poll interval: " USEC_FMT "\n", | |
578 | NTP_FIELD_LEAP(ntpmsg.field), | |
579 | NTP_FIELD_VERSION(ntpmsg.field), | |
580 | NTP_FIELD_MODE(ntpmsg.field), | |
581 | ntpmsg.stratum, | |
582 | exp2(ntpmsg.precision), ntpmsg.precision, | |
3af0442c | 583 | root_distance, |
84e51726 LP |
584 | ntpmsg.stratum == 1 ? ntpmsg.refid : "n/a", |
585 | origin - OFFSET_1900_1970, | |
586 | receive - OFFSET_1900_1970, | |
587 | trans - OFFSET_1900_1970, | |
588 | dest - OFFSET_1900_1970, | |
589 | offset, delay, | |
590 | m->packet_count, | |
591 | m->samples_jitter, spike ? " spike" : "", | |
592 | m->poll_interval_usec / USEC_PER_SEC); | |
593 | ||
594 | if (!spike) { | |
595 | m->sync = true; | |
596 | r = manager_adjust_clock(m, offset, leap_sec); | |
597 | if (r < 0) | |
6ff6f4d8 | 598 | log_error_errno(r, "Failed to call clock_adjtime(): %m"); |
84e51726 LP |
599 | } |
600 | ||
66086a40 YW |
601 | /* Save NTP response */ |
602 | m->ntpmsg = ntpmsg; | |
603 | m->origin_time = m->trans_time; | |
604 | m->dest_time = *recv_time; | |
605 | m->spike = spike; | |
606 | ||
607 | log_debug("interval/delta/delay/jitter/drift " USEC_FMT "s/%+.3fs/%.3fs/%.3fs/%+"PRI_TIMEX"ppm%s", | |
608 | m->poll_interval_usec / USEC_PER_SEC, offset, delay, m->samples_jitter, m->drift_freq / 65536, | |
7b5b3fc3 | 609 | spike ? " (ignored)" : ""); |
84e51726 | 610 | |
66086a40 YW |
611 | (void) sd_bus_emit_properties_changed(m->bus, "/org/freedesktop/timesync1", "org.freedesktop.timesync1.Manager", "NTPMessage", NULL); |
612 | ||
481b3f9e LP |
613 | if (!m->good) { |
614 | _cleanup_free_ char *pretty = NULL; | |
615 | ||
616 | m->good = true; | |
617 | ||
618 | server_address_pretty(m->current_server_address, &pretty); | |
619 | log_info("Synchronized to time server %s (%s).", strna(pretty), m->current_server_name->string); | |
620 | sd_notifyf(false, "STATUS=Synchronized to time server %s (%s).", strna(pretty), m->current_server_name->string); | |
621 | } | |
622 | ||
84e51726 | 623 | r = manager_arm_timer(m, m->poll_interval_usec); |
f647962d MS |
624 | if (r < 0) |
625 | return log_error_errno(r, "Failed to rearm timer: %m"); | |
84e51726 LP |
626 | |
627 | return 0; | |
628 | } | |
629 | ||
630 | static int manager_listen_setup(Manager *m) { | |
631 | union sockaddr_union addr = {}; | |
632 | static const int tos = IPTOS_LOWDELAY; | |
633 | static const int on = 1; | |
634 | int r; | |
635 | ||
636 | assert(m); | |
637 | ||
f89c4e15 LP |
638 | if (m->server_socket >= 0) |
639 | return 0; | |
640 | ||
84e51726 LP |
641 | assert(!m->event_receive); |
642 | assert(m->current_server_address); | |
643 | ||
644 | addr.sa.sa_family = m->current_server_address->sockaddr.sa.sa_family; | |
645 | ||
646 | m->server_socket = socket(addr.sa.sa_family, SOCK_DGRAM | SOCK_CLOEXEC, 0); | |
647 | if (m->server_socket < 0) | |
648 | return -errno; | |
649 | ||
650 | r = bind(m->server_socket, &addr.sa, m->current_server_address->socklen); | |
651 | if (r < 0) | |
652 | return -errno; | |
653 | ||
487a3682 | 654 | r = setsockopt(m->server_socket, SOL_SOCKET, SO_TIMESTAMPNS, &on, sizeof(on)); |
84e51726 LP |
655 | if (r < 0) |
656 | return -errno; | |
657 | ||
69f00817 | 658 | (void) setsockopt(m->server_socket, IPPROTO_IP, IP_TOS, &tos, sizeof(tos)); |
84e51726 LP |
659 | |
660 | return sd_event_add_io(m->event, &m->event_receive, m->server_socket, EPOLLIN, manager_receive_response, m); | |
661 | } | |
662 | ||
f89c4e15 LP |
663 | static void manager_listen_stop(Manager *m) { |
664 | assert(m); | |
665 | ||
666 | m->event_receive = sd_event_source_unref(m->event_receive); | |
667 | m->server_socket = safe_close(m->server_socket); | |
668 | } | |
669 | ||
84e51726 LP |
670 | static int manager_begin(Manager *m) { |
671 | _cleanup_free_ char *pretty = NULL; | |
672 | int r; | |
673 | ||
674 | assert(m); | |
675 | assert_return(m->current_server_name, -EHOSTUNREACH); | |
676 | assert_return(m->current_server_address, -EHOSTUNREACH); | |
677 | ||
481b3f9e | 678 | m->good = false; |
e8206972 | 679 | m->missed_replies = NTP_MAX_MISSED_REPLIES; |
80cd2606 | 680 | if (m->poll_interval_usec == 0) |
a4465d0d | 681 | m->poll_interval_usec = m->poll_interval_min_usec; |
84e51726 LP |
682 | |
683 | server_address_pretty(m->current_server_address, &pretty); | |
481b3f9e LP |
684 | log_debug("Connecting to time server %s (%s).", strna(pretty), m->current_server_name->string); |
685 | sd_notifyf(false, "STATUS=Connecting to time server %s (%s).", strna(pretty), m->current_server_name->string); | |
84e51726 | 686 | |
84e51726 LP |
687 | r = manager_clock_watch_setup(m); |
688 | if (r < 0) | |
689 | return r; | |
690 | ||
691 | return manager_send_request(m); | |
692 | } | |
693 | ||
874ff7bf LP |
694 | void manager_set_server_name(Manager *m, ServerName *n) { |
695 | assert(m); | |
84e51726 | 696 | |
874ff7bf LP |
697 | if (m->current_server_name == n) |
698 | return; | |
84e51726 | 699 | |
874ff7bf LP |
700 | m->current_server_name = n; |
701 | m->current_server_address = NULL; | |
702 | ||
703 | manager_disconnect(m); | |
84e51726 | 704 | |
874ff7bf LP |
705 | if (n) |
706 | log_debug("Selected server %s.", n->string); | |
707 | } | |
84e51726 | 708 | |
874ff7bf | 709 | void manager_set_server_address(Manager *m, ServerAddress *a) { |
84e51726 LP |
710 | assert(m); |
711 | ||
874ff7bf LP |
712 | if (m->current_server_address == a) |
713 | return; | |
714 | ||
874ff7bf | 715 | m->current_server_address = a; |
20f8d3cf SN |
716 | /* If a is NULL, we are just clearing the address, without |
717 | * changing the name. Keep the existing name in that case. */ | |
718 | if (a) | |
719 | m->current_server_name = a->name; | |
874ff7bf LP |
720 | |
721 | manager_disconnect(m); | |
722 | ||
723 | if (a) { | |
724 | _cleanup_free_ char *pretty = NULL; | |
725 | server_address_pretty(a, &pretty); | |
726 | log_debug("Selected address %s of server %s.", strna(pretty), a->name->string); | |
84e51726 LP |
727 | } |
728 | } | |
729 | ||
730 | static int manager_resolve_handler(sd_resolve_query *q, int ret, const struct addrinfo *ai, void *userdata) { | |
731 | Manager *m = userdata; | |
874ff7bf | 732 | int r; |
84e51726 LP |
733 | |
734 | assert(q); | |
735 | assert(m); | |
736 | assert(m->current_server_name); | |
737 | ||
738 | m->resolve_query = sd_resolve_query_unref(m->resolve_query); | |
739 | ||
740 | if (ret != 0) { | |
741 | log_debug("Failed to resolve %s: %s", m->current_server_name->string, gai_strerror(ret)); | |
742 | ||
743 | /* Try next host */ | |
744 | return manager_connect(m); | |
745 | } | |
746 | ||
84e51726 LP |
747 | for (; ai; ai = ai->ai_next) { |
748 | _cleanup_free_ char *pretty = NULL; | |
874ff7bf | 749 | ServerAddress *a; |
84e51726 LP |
750 | |
751 | assert(ai->ai_addr); | |
752 | assert(ai->ai_addrlen >= offsetof(struct sockaddr, sa_data)); | |
84e51726 LP |
753 | |
754 | if (!IN_SET(ai->ai_addr->sa_family, AF_INET, AF_INET6)) { | |
755 | log_warning("Unsuitable address protocol for %s", m->current_server_name->string); | |
756 | continue; | |
757 | } | |
758 | ||
874ff7bf | 759 | r = server_address_new(m->current_server_name, &a, (const union sockaddr_union*) ai->ai_addr, ai->ai_addrlen); |
f647962d MS |
760 | if (r < 0) |
761 | return log_error_errno(r, "Failed to add server address: %m"); | |
84e51726 | 762 | |
874ff7bf | 763 | server_address_pretty(a, &pretty); |
84e51726 LP |
764 | log_debug("Resolved address %s for %s.", pretty, m->current_server_name->string); |
765 | } | |
766 | ||
767 | if (!m->current_server_name->addresses) { | |
768 | log_error("Failed to find suitable address for host %s.", m->current_server_name->string); | |
769 | ||
770 | /* Try next host */ | |
771 | return manager_connect(m); | |
772 | } | |
773 | ||
874ff7bf | 774 | manager_set_server_address(m, m->current_server_name->addresses); |
84e51726 LP |
775 | |
776 | return manager_begin(m); | |
777 | } | |
778 | ||
874ff7bf | 779 | static int manager_retry_connect(sd_event_source *source, usec_t usec, void *userdata) { |
84e51726 LP |
780 | Manager *m = userdata; |
781 | ||
782 | assert(m); | |
783 | ||
784 | return manager_connect(m); | |
785 | } | |
786 | ||
787 | int manager_connect(Manager *m) { | |
84e51726 LP |
788 | int r; |
789 | ||
790 | assert(m); | |
791 | ||
792 | manager_disconnect(m); | |
793 | ||
794 | m->event_retry = sd_event_source_unref(m->event_retry); | |
7994ac1d | 795 | if (!ratelimit_below(&m->ratelimit)) { |
84e51726 LP |
796 | log_debug("Slowing down attempts to contact servers."); |
797 | ||
874ff7bf | 798 | r = sd_event_add_time(m->event, &m->event_retry, clock_boottime_or_monotonic(), now(clock_boottime_or_monotonic()) + RETRY_USEC, 0, manager_retry_connect, m); |
f647962d MS |
799 | if (r < 0) |
800 | return log_error_errno(r, "Failed to create retry timer: %m"); | |
84e51726 LP |
801 | |
802 | return 0; | |
803 | } | |
804 | ||
805 | /* If we already are operating on some address, switch to the | |
806 | * next one. */ | |
807 | if (m->current_server_address && m->current_server_address->addresses_next) | |
874ff7bf | 808 | manager_set_server_address(m, m->current_server_address->addresses_next); |
84e51726 | 809 | else { |
874ff7bf LP |
810 | struct addrinfo hints = { |
811 | .ai_flags = AI_NUMERICSERV|AI_ADDRCONFIG, | |
812 | .ai_socktype = SOCK_DGRAM, | |
813 | }; | |
84e51726 | 814 | |
874ff7bf | 815 | /* Hmm, we are through all addresses, let's look for the next host instead */ |
84e51726 | 816 | if (m->current_server_name && m->current_server_name->names_next) |
874ff7bf | 817 | manager_set_server_name(m, m->current_server_name->names_next); |
84e51726 | 818 | else { |
874ff7bf | 819 | ServerName *f; |
63463bf0 | 820 | bool restart = true; |
874ff7bf LP |
821 | |
822 | /* Our current server name list is exhausted, | |
823 | * let's find the next one to iterate. First | |
824 | * we try the system list, then the link list. | |
825 | * After having processed the link list we | |
826 | * jump back to the system list. However, if | |
827 | * both lists are empty, we change to the | |
828 | * fallback list. */ | |
829 | if (!m->current_server_name || m->current_server_name->type == SERVER_LINK) { | |
830 | f = m->system_servers; | |
831 | if (!f) | |
832 | f = m->link_servers; | |
833 | } else { | |
834 | f = m->link_servers; | |
835 | if (!f) | |
836 | f = m->system_servers; | |
63463bf0 ML |
837 | else |
838 | restart = false; | |
874ff7bf LP |
839 | } |
840 | ||
841 | if (!f) | |
842 | f = m->fallback_servers; | |
843 | ||
844 | if (!f) { | |
845 | manager_set_server_name(m, NULL); | |
84e51726 LP |
846 | log_debug("No server found."); |
847 | return 0; | |
848 | } | |
849 | ||
63463bf0 ML |
850 | if (restart && !m->exhausted_servers && m->poll_interval_usec) { |
851 | log_debug("Waiting after exhausting servers."); | |
852 | r = sd_event_add_time(m->event, &m->event_retry, clock_boottime_or_monotonic(), now(clock_boottime_or_monotonic()) + m->poll_interval_usec, 0, manager_retry_connect, m); | |
f647962d MS |
853 | if (r < 0) |
854 | return log_error_errno(r, "Failed to create retry timer: %m"); | |
63463bf0 ML |
855 | |
856 | m->exhausted_servers = true; | |
857 | ||
858 | /* Increase the polling interval */ | |
a4465d0d | 859 | if (m->poll_interval_usec < m->poll_interval_max_usec) |
63463bf0 ML |
860 | m->poll_interval_usec *= 2; |
861 | ||
862 | return 0; | |
863 | } | |
864 | ||
865 | m->exhausted_servers = false; | |
866 | ||
874ff7bf | 867 | manager_set_server_name(m, f); |
84e51726 LP |
868 | } |
869 | ||
870 | /* Tell the resolver to reread /etc/resolv.conf, in | |
871 | * case it changed. */ | |
872 | res_init(); | |
873 | ||
874ff7bf LP |
874 | /* Flush out any previously resolved addresses */ |
875 | server_name_flush_addresses(m->current_server_name); | |
876 | ||
877 | log_debug("Resolving %s...", m->current_server_name->string); | |
878 | ||
84e51726 | 879 | r = sd_resolve_getaddrinfo(m->resolve, &m->resolve_query, m->current_server_name->string, "123", &hints, manager_resolve_handler, m); |
f647962d MS |
880 | if (r < 0) |
881 | return log_error_errno(r, "Failed to create resolver: %m"); | |
84e51726 LP |
882 | |
883 | return 1; | |
884 | } | |
885 | ||
886 | r = manager_begin(m); | |
887 | if (r < 0) | |
888 | return r; | |
889 | ||
890 | return 1; | |
891 | } | |
892 | ||
84e51726 LP |
893 | void manager_disconnect(Manager *m) { |
894 | assert(m); | |
895 | ||
896 | m->resolve_query = sd_resolve_query_unref(m->resolve_query); | |
897 | ||
898 | m->event_timer = sd_event_source_unref(m->event_timer); | |
899 | ||
f89c4e15 | 900 | manager_listen_stop(m); |
84e51726 LP |
901 | |
902 | m->event_clock_watch = sd_event_source_unref(m->event_clock_watch); | |
903 | m->clock_watch_fd = safe_close(m->clock_watch_fd); | |
904 | ||
905 | m->event_timeout = sd_event_source_unref(m->event_timeout); | |
906 | ||
907 | sd_notifyf(false, "STATUS=Idle."); | |
908 | } | |
909 | ||
874ff7bf LP |
910 | void manager_flush_server_names(Manager *m, ServerType t) { |
911 | assert(m); | |
912 | ||
913 | if (t == SERVER_SYSTEM) | |
914 | while (m->system_servers) | |
915 | server_name_free(m->system_servers); | |
916 | ||
917 | if (t == SERVER_LINK) | |
918 | while (m->link_servers) | |
919 | server_name_free(m->link_servers); | |
920 | ||
921 | if (t == SERVER_FALLBACK) | |
922 | while (m->fallback_servers) | |
923 | server_name_free(m->fallback_servers); | |
924 | } | |
84e51726 LP |
925 | |
926 | void manager_free(Manager *m) { | |
927 | if (!m) | |
928 | return; | |
929 | ||
930 | manager_disconnect(m); | |
874ff7bf LP |
931 | manager_flush_server_names(m, SERVER_SYSTEM); |
932 | manager_flush_server_names(m, SERVER_LINK); | |
933 | manager_flush_server_names(m, SERVER_FALLBACK); | |
84e51726 LP |
934 | |
935 | sd_event_source_unref(m->event_retry); | |
936 | ||
937 | sd_event_source_unref(m->network_event_source); | |
938 | sd_network_monitor_unref(m->network_monitor); | |
939 | ||
940 | sd_resolve_unref(m->resolve); | |
941 | sd_event_unref(m->event); | |
942 | ||
e7dd3947 YW |
943 | sd_bus_unref(m->bus); |
944 | ||
84e51726 LP |
945 | free(m); |
946 | } | |
947 | ||
874ff7bf LP |
948 | static int manager_network_read_link_servers(Manager *m) { |
949 | _cleanup_strv_free_ char **ntp = NULL; | |
950 | ServerName *n, *nx; | |
951 | char **i; | |
3e85ec07 | 952 | bool changed = false; |
874ff7bf LP |
953 | int r; |
954 | ||
84e51726 LP |
955 | assert(m); |
956 | ||
874ff7bf | 957 | r = sd_network_get_ntp(&ntp); |
ba0c011e YW |
958 | if (r < 0) { |
959 | if (r == -ENOMEM) | |
960 | log_oom(); | |
961 | else | |
962 | log_debug_errno(r, "Failed to get link NTP servers: %m"); | |
874ff7bf | 963 | goto clear; |
ba0c011e | 964 | } |
874ff7bf LP |
965 | |
966 | LIST_FOREACH(names, n, m->link_servers) | |
967 | n->marked = true; | |
968 | ||
969 | STRV_FOREACH(i, ntp) { | |
970 | bool found = false; | |
971 | ||
dcb37458 YW |
972 | r = dns_name_is_valid_or_address(*i); |
973 | if (r < 0) { | |
974 | log_error_errno(r, "Failed to check validity of NTP server name or address '%s': %m", *i); | |
975 | goto clear; | |
976 | } else if (r == 0) { | |
977 | log_error("Invalid NTP server name or address, ignoring: %s", *i); | |
978 | continue; | |
979 | } | |
980 | ||
874ff7bf LP |
981 | LIST_FOREACH(names, n, m->link_servers) |
982 | if (streq(n->string, *i)) { | |
983 | n->marked = false; | |
984 | found = true; | |
985 | break; | |
986 | } | |
987 | ||
988 | if (!found) { | |
989 | r = server_name_new(m, NULL, SERVER_LINK, *i); | |
ba0c011e YW |
990 | if (r < 0) { |
991 | log_oom(); | |
874ff7bf | 992 | goto clear; |
ba0c011e | 993 | } |
3e85ec07 YW |
994 | |
995 | changed = true; | |
874ff7bf LP |
996 | } |
997 | } | |
998 | ||
999 | LIST_FOREACH_SAFE(names, n, nx, m->link_servers) | |
3e85ec07 | 1000 | if (n->marked) { |
874ff7bf | 1001 | server_name_free(n); |
3e85ec07 YW |
1002 | changed = true; |
1003 | } | |
874ff7bf | 1004 | |
3e85ec07 | 1005 | return changed; |
874ff7bf LP |
1006 | |
1007 | clear: | |
1008 | manager_flush_server_names(m, SERVER_LINK); | |
1009 | return r; | |
84e51726 LP |
1010 | } |
1011 | ||
0630eb1b YW |
1012 | static bool manager_is_connected(Manager *m) { |
1013 | /* Return true when the manager is sending a request, resolving a server name, or | |
1014 | * in a poll interval. */ | |
1015 | return m->server_socket >= 0 || m->resolve_query || m->event_timer; | |
1016 | } | |
1017 | ||
84e51726 LP |
1018 | static int manager_network_event_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
1019 | Manager *m = userdata; | |
3e85ec07 | 1020 | bool changed, connected, online; |
84e51726 LP |
1021 | int r; |
1022 | ||
1023 | assert(m); | |
1024 | ||
1025 | sd_network_monitor_flush(m->network_monitor); | |
1026 | ||
ba0c011e | 1027 | /* When manager_network_read_link_servers() failed, we assume that the servers are changed. */ |
3e85ec07 | 1028 | changed = !!manager_network_read_link_servers(m); |
874ff7bf | 1029 | |
84e51726 LP |
1030 | /* check if the machine is online */ |
1031 | online = network_is_online(); | |
1032 | ||
1033 | /* check if the client is currently connected */ | |
0630eb1b | 1034 | connected = manager_is_connected(m); |
84e51726 LP |
1035 | |
1036 | if (connected && !online) { | |
1037 | log_info("No network connectivity, watching for changes."); | |
1038 | manager_disconnect(m); | |
1039 | ||
0630eb1b | 1040 | } else if ((!connected || changed) && online) { |
84e51726 LP |
1041 | log_info("Network configuration changed, trying to establish connection."); |
1042 | ||
1043 | if (m->current_server_address) | |
1044 | r = manager_begin(m); | |
1045 | else | |
1046 | r = manager_connect(m); | |
1047 | if (r < 0) | |
1048 | return r; | |
1049 | } | |
1050 | ||
1051 | return 0; | |
1052 | } | |
1053 | ||
1054 | static int manager_network_monitor_listen(Manager *m) { | |
1055 | int r, fd, events; | |
1056 | ||
1057 | assert(m); | |
1058 | ||
1059 | r = sd_network_monitor_new(&m->network_monitor, NULL); | |
36484c03 | 1060 | if (r == -ENOENT) { |
f95b0be7 | 1061 | log_info("systemd does not appear to be running, not listening for systemd-networkd events."); |
36484c03 ZJS |
1062 | return 0; |
1063 | } | |
84e51726 LP |
1064 | if (r < 0) |
1065 | return r; | |
1066 | ||
1067 | fd = sd_network_monitor_get_fd(m->network_monitor); | |
1068 | if (fd < 0) | |
1069 | return fd; | |
1070 | ||
1071 | events = sd_network_monitor_get_events(m->network_monitor); | |
1072 | if (events < 0) | |
1073 | return events; | |
1074 | ||
1075 | r = sd_event_add_io(m->event, &m->network_event_source, fd, events, manager_network_event_handler, m); | |
1076 | if (r < 0) | |
1077 | return r; | |
1078 | ||
1079 | return 0; | |
1080 | } | |
1081 | ||
1082 | int manager_new(Manager **ret) { | |
1083 | _cleanup_(manager_freep) Manager *m = NULL; | |
1084 | int r; | |
1085 | ||
1086 | assert(ret); | |
1087 | ||
1088 | m = new0(Manager, 1); | |
1089 | if (!m) | |
1090 | return -ENOMEM; | |
1091 | ||
f907cc16 | 1092 | m->max_root_distance_usec = NTP_MAX_ROOT_DISTANCE; |
a4465d0d YW |
1093 | m->poll_interval_min_usec = NTP_POLL_INTERVAL_MIN_USEC; |
1094 | m->poll_interval_max_usec = NTP_POLL_INTERVAL_MAX_USEC; | |
f907cc16 | 1095 | |
84e51726 LP |
1096 | m->server_socket = m->clock_watch_fd = -1; |
1097 | ||
1098 | RATELIMIT_INIT(m->ratelimit, RATELIMIT_INTERVAL_USEC, RATELIMIT_BURST); | |
1099 | ||
84e51726 LP |
1100 | r = sd_event_default(&m->event); |
1101 | if (r < 0) | |
1102 | return r; | |
1103 | ||
1104 | sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL); | |
1105 | sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL); | |
1106 | ||
1107 | sd_event_set_watchdog(m->event, true); | |
1108 | ||
1109 | r = sd_resolve_default(&m->resolve); | |
1110 | if (r < 0) | |
1111 | return r; | |
1112 | ||
1113 | r = sd_resolve_attach_event(m->resolve, m->event, 0); | |
1114 | if (r < 0) | |
1115 | return r; | |
1116 | ||
1117 | r = manager_network_monitor_listen(m); | |
1118 | if (r < 0) | |
1119 | return r; | |
1120 | ||
ba0c011e | 1121 | (void) manager_network_read_link_servers(m); |
874ff7bf | 1122 | |
1cc6c93a | 1123 | *ret = TAKE_PTR(m); |
84e51726 LP |
1124 | |
1125 | return 0; | |
1126 | } |