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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> | |
84e51726 LP |
9 | #include <sys/timerfd.h> |
10 | #include <sys/timex.h> | |
84e51726 | 11 | #include <sys/types.h> |
07630cea LP |
12 | |
13 | #include "sd-daemon.h" | |
84e51726 | 14 | |
b5efdb8a | 15 | #include "alloc-util.h" |
dcb37458 | 16 | #include "dns-domain.h" |
3ffd4af2 | 17 | #include "fd-util.h" |
ca78ad1d | 18 | #include "format-util.h" |
f4f15635 | 19 | #include "fs-util.h" |
84e51726 | 20 | #include "list.h" |
07630cea | 21 | #include "log.h" |
07630cea | 22 | #include "network-util.h" |
84e51726 | 23 | #include "ratelimit.h" |
7082bb05 | 24 | #include "resolve-private.h" |
07630cea | 25 | #include "socket-util.h" |
07630cea | 26 | #include "string-util.h" |
84e51726 | 27 | #include "strv.h" |
07630cea | 28 | #include "time-util.h" |
84e51726 LP |
29 | #include "timesyncd-conf.h" |
30 | #include "timesyncd-manager.h" | |
3ffd4af2 | 31 | #include "util.h" |
84e51726 LP |
32 | |
33 | #ifndef ADJ_SETOFFSET | |
34 | #define ADJ_SETOFFSET 0x0100 /* add 'time' to current time */ | |
35 | #endif | |
36 | ||
37 | /* expected accuracy of time synchronization; used to adjust the poll interval */ | |
38 | #define NTP_ACCURACY_SEC 0.2 | |
39 | ||
84e51726 LP |
40 | /* |
41 | * Maximum delta in seconds which the system clock is gradually adjusted | |
a4465d0d | 42 | * (slewed) to approach the network time. Deltas larger that this are set by |
84e51726 LP |
43 | * letting the system time jump. The kernel's limit for adjtime is 0.5s. |
44 | */ | |
45 | #define NTP_MAX_ADJUST 0.4 | |
46 | ||
a4465d0d | 47 | /* Default of maximum acceptable root distance in microseconds. */ |
f907cc16 | 48 | #define NTP_MAX_ROOT_DISTANCE (5 * USEC_PER_SEC) |
3af0442c | 49 | |
e8206972 ML |
50 | /* Maximum number of missed replies before selecting another source. */ |
51 | #define NTP_MAX_MISSED_REPLIES 2 | |
52 | ||
84e51726 LP |
53 | #define RETRY_USEC (30*USEC_PER_SEC) |
54 | #define RATELIMIT_INTERVAL_USEC (10*USEC_PER_SEC) | |
55 | #define RATELIMIT_BURST 10 | |
56 | ||
57 | #define TIMEOUT_USEC (10*USEC_PER_SEC) | |
58 | ||
84e51726 LP |
59 | static int manager_arm_timer(Manager *m, usec_t next); |
60 | static int manager_clock_watch_setup(Manager *m); | |
7b628891 | 61 | static int manager_listen_setup(Manager *m); |
f89c4e15 | 62 | static void manager_listen_stop(Manager *m); |
84e51726 | 63 | |
3af0442c ML |
64 | static double ntp_ts_short_to_d(const struct ntp_ts_short *ts) { |
65 | return be16toh(ts->sec) + (be16toh(ts->frac) / 65536.0); | |
66 | } | |
67 | ||
84e51726 LP |
68 | static double ntp_ts_to_d(const struct ntp_ts *ts) { |
69 | return be32toh(ts->sec) + ((double)be32toh(ts->frac) / UINT_MAX); | |
70 | } | |
71 | ||
72 | static double ts_to_d(const struct timespec *ts) { | |
73 | return ts->tv_sec + (1.0e-9 * ts->tv_nsec); | |
74 | } | |
75 | ||
84e51726 LP |
76 | static int manager_timeout(sd_event_source *source, usec_t usec, void *userdata) { |
77 | _cleanup_free_ char *pretty = NULL; | |
78 | Manager *m = userdata; | |
79 | ||
80 | assert(m); | |
81 | assert(m->current_server_name); | |
82 | assert(m->current_server_address); | |
83 | ||
84 | server_address_pretty(m->current_server_address, &pretty); | |
85 | log_info("Timed out waiting for reply from %s (%s).", strna(pretty), m->current_server_name->string); | |
86 | ||
87 | return manager_connect(m); | |
88 | } | |
89 | ||
90 | static int manager_send_request(Manager *m) { | |
91 | _cleanup_free_ char *pretty = NULL; | |
92 | struct ntp_msg ntpmsg = { | |
93 | /* | |
94 | * "The client initializes the NTP message header, sends the request | |
95 | * to the server, and strips the time of day from the Transmit | |
96 | * Timestamp field of the reply. For this purpose, all the NTP | |
97 | * header fields are set to 0, except the Mode, VN, and optional | |
98 | * Transmit Timestamp fields." | |
99 | */ | |
100 | .field = NTP_FIELD(0, 4, NTP_MODE_CLIENT), | |
101 | }; | |
102 | ssize_t len; | |
103 | int r; | |
104 | ||
105 | assert(m); | |
106 | assert(m->current_server_name); | |
107 | assert(m->current_server_address); | |
108 | ||
109 | m->event_timeout = sd_event_source_unref(m->event_timeout); | |
110 | ||
f89c4e15 LP |
111 | r = manager_listen_setup(m); |
112 | if (r < 0) | |
105a1a36 | 113 | return log_warning_errno(r, "Failed to set up connection socket: %m"); |
7b628891 | 114 | |
84e51726 LP |
115 | /* |
116 | * Set transmit timestamp, remember it; the server will send that back | |
117 | * as the origin timestamp and we have an indication that this is the | |
118 | * matching answer to our request. | |
119 | * | |
120 | * The actual value does not matter, We do not care about the correct | |
121 | * NTP UINT_MAX fraction; we just pass the plain nanosecond value. | |
122 | */ | |
123 | assert_se(clock_gettime(clock_boottime_or_monotonic(), &m->trans_time_mon) >= 0); | |
124 | assert_se(clock_gettime(CLOCK_REALTIME, &m->trans_time) >= 0); | |
125 | ntpmsg.trans_time.sec = htobe32(m->trans_time.tv_sec + OFFSET_1900_1970); | |
126 | ntpmsg.trans_time.frac = htobe32(m->trans_time.tv_nsec); | |
127 | ||
128 | server_address_pretty(m->current_server_address, &pretty); | |
129 | ||
130 | len = sendto(m->server_socket, &ntpmsg, sizeof(ntpmsg), MSG_DONTWAIT, &m->current_server_address->sockaddr.sa, m->current_server_address->socklen); | |
131 | if (len == sizeof(ntpmsg)) { | |
132 | m->pending = true; | |
133 | log_debug("Sent NTP request to %s (%s).", strna(pretty), m->current_server_name->string); | |
134 | } else { | |
56f64d95 | 135 | log_debug_errno(errno, "Sending NTP request to %s (%s) failed: %m", strna(pretty), m->current_server_name->string); |
84e51726 LP |
136 | return manager_connect(m); |
137 | } | |
138 | ||
ab4df227 | 139 | /* re-arm timer with increasing timeout, in case the packets never arrive back */ |
5919bd3d ZJS |
140 | if (m->retry_interval == 0) |
141 | m->retry_interval = NTP_RETRY_INTERVAL_MIN_USEC; | |
142 | else | |
143 | m->retry_interval = MIN(m->retry_interval * 4/3, NTP_RETRY_INTERVAL_MAX_USEC); | |
ab4df227 KS |
144 | |
145 | r = manager_arm_timer(m, m->retry_interval); | |
f647962d MS |
146 | if (r < 0) |
147 | return log_error_errno(r, "Failed to rearm timer: %m"); | |
ab4df227 | 148 | |
e8206972 ML |
149 | m->missed_replies++; |
150 | if (m->missed_replies > NTP_MAX_MISSED_REPLIES) { | |
151 | r = sd_event_add_time( | |
152 | m->event, | |
153 | &m->event_timeout, | |
154 | clock_boottime_or_monotonic(), | |
155 | now(clock_boottime_or_monotonic()) + TIMEOUT_USEC, 0, | |
156 | manager_timeout, m); | |
f647962d MS |
157 | if (r < 0) |
158 | return log_error_errno(r, "Failed to arm timeout timer: %m"); | |
84e51726 LP |
159 | } |
160 | ||
161 | return 0; | |
162 | } | |
163 | ||
164 | static int manager_timer(sd_event_source *source, usec_t usec, void *userdata) { | |
165 | Manager *m = userdata; | |
166 | ||
167 | assert(m); | |
168 | ||
169 | return manager_send_request(m); | |
170 | } | |
171 | ||
172 | static int manager_arm_timer(Manager *m, usec_t next) { | |
173 | int r; | |
174 | ||
175 | assert(m); | |
84e51726 LP |
176 | |
177 | if (next == 0) { | |
178 | m->event_timer = sd_event_source_unref(m->event_timer); | |
179 | return 0; | |
180 | } | |
181 | ||
182 | if (m->event_timer) { | |
39cf0351 | 183 | r = sd_event_source_set_time_relative(m->event_timer, next); |
84e51726 LP |
184 | if (r < 0) |
185 | return r; | |
186 | ||
187 | return sd_event_source_set_enabled(m->event_timer, SD_EVENT_ONESHOT); | |
188 | } | |
189 | ||
39cf0351 | 190 | return sd_event_add_time_relative( |
84e51726 LP |
191 | m->event, |
192 | &m->event_timer, | |
193 | clock_boottime_or_monotonic(), | |
39cf0351 | 194 | next, 0, |
84e51726 LP |
195 | manager_timer, m); |
196 | } | |
197 | ||
198 | static int manager_clock_watch(sd_event_source *source, int fd, uint32_t revents, void *userdata) { | |
199 | Manager *m = userdata; | |
200 | ||
201 | assert(m); | |
202 | ||
203 | /* rearm timer */ | |
204 | manager_clock_watch_setup(m); | |
205 | ||
206 | /* skip our own jumps */ | |
207 | if (m->jumped) { | |
208 | m->jumped = false; | |
209 | return 0; | |
210 | } | |
211 | ||
212 | /* resync */ | |
7e3254b3 | 213 | log_debug("System time changed. Resyncing."); |
84e51726 LP |
214 | m->poll_resync = true; |
215 | ||
216 | return manager_send_request(m); | |
217 | } | |
218 | ||
219 | /* wake up when the system time changes underneath us */ | |
220 | static int manager_clock_watch_setup(Manager *m) { | |
84e51726 LP |
221 | int r; |
222 | ||
223 | assert(m); | |
224 | ||
225 | m->event_clock_watch = sd_event_source_unref(m->event_clock_watch); | |
226 | safe_close(m->clock_watch_fd); | |
227 | ||
4f811d27 | 228 | m->clock_watch_fd = time_change_fd(); |
4a62c710 | 229 | if (m->clock_watch_fd < 0) |
4f811d27 | 230 | return log_error_errno(m->clock_watch_fd, "Failed to create timerfd: %m"); |
84e51726 LP |
231 | |
232 | r = sd_event_add_io(m->event, &m->event_clock_watch, m->clock_watch_fd, EPOLLIN, manager_clock_watch, m); | |
f647962d MS |
233 | if (r < 0) |
234 | return log_error_errno(r, "Failed to create clock watch event source: %m"); | |
84e51726 LP |
235 | |
236 | return 0; | |
237 | } | |
238 | ||
239 | static int manager_adjust_clock(Manager *m, double offset, int leap_sec) { | |
240 | struct timex tmx = {}; | |
241 | int r; | |
242 | ||
243 | assert(m); | |
244 | ||
245 | /* | |
246 | * For small deltas, tell the kernel to gradually adjust the system | |
247 | * clock to the NTP time, larger deltas are just directly set. | |
248 | */ | |
249 | if (fabs(offset) < NTP_MAX_ADJUST) { | |
250 | tmx.modes = ADJ_STATUS | ADJ_NANO | ADJ_OFFSET | ADJ_TIMECONST | ADJ_MAXERROR | ADJ_ESTERROR; | |
251 | tmx.status = STA_PLL; | |
252 | tmx.offset = offset * NSEC_PER_SEC; | |
253 | tmx.constant = log2i(m->poll_interval_usec / USEC_PER_SEC) - 4; | |
254 | tmx.maxerror = 0; | |
255 | tmx.esterror = 0; | |
ff49bc32 | 256 | log_debug(" adjust (slew): %+.3f sec", offset); |
84e51726 | 257 | } else { |
5f36e3d3 | 258 | tmx.modes = ADJ_STATUS | ADJ_NANO | ADJ_SETOFFSET | ADJ_MAXERROR | ADJ_ESTERROR; |
84e51726 LP |
259 | |
260 | /* ADJ_NANO uses nanoseconds in the microseconds field */ | |
261 | tmx.time.tv_sec = (long)offset; | |
262 | tmx.time.tv_usec = (offset - tmx.time.tv_sec) * NSEC_PER_SEC; | |
5f36e3d3 AK |
263 | tmx.maxerror = 0; |
264 | tmx.esterror = 0; | |
84e51726 LP |
265 | |
266 | /* the kernel expects -0.3s as {-1, 7000.000.000} */ | |
267 | if (tmx.time.tv_usec < 0) { | |
268 | tmx.time.tv_sec -= 1; | |
269 | tmx.time.tv_usec += NSEC_PER_SEC; | |
270 | } | |
271 | ||
272 | m->jumped = true; | |
ff49bc32 | 273 | log_debug(" adjust (jump): %+.3f sec", offset); |
84e51726 LP |
274 | } |
275 | ||
276 | /* | |
277 | * An unset STA_UNSYNC will enable the kernel's 11-minute mode, | |
278 | * which syncs the system time periodically to the RTC. | |
279 | * | |
280 | * In case the RTC runs in local time, never touch the RTC, | |
281 | * we have no way to properly handle daylight saving changes and | |
282 | * mobile devices moving between time zones. | |
283 | */ | |
284 | if (m->rtc_local_time) | |
285 | tmx.status |= STA_UNSYNC; | |
286 | ||
287 | switch (leap_sec) { | |
288 | case 1: | |
289 | tmx.status |= STA_INS; | |
290 | break; | |
291 | case -1: | |
292 | tmx.status |= STA_DEL; | |
293 | break; | |
294 | } | |
295 | ||
296 | r = clock_adjtime(CLOCK_REALTIME, &tmx); | |
297 | if (r < 0) | |
6ff6f4d8 | 298 | return -errno; |
84e51726 | 299 | |
baa33e79 | 300 | /* If touch fails, there isn't much we can do. Maybe it'll work next time. */ |
53d133ea | 301 | (void) touch("/var/lib/systemd/timesync/clock"); |
2dd79846 | 302 | (void) touch("/run/systemd/timesync/synchronized"); |
84e51726 | 303 | |
66086a40 | 304 | m->drift_freq = tmx.freq; |
84e51726 LP |
305 | |
306 | log_debug(" status : %04i %s\n" | |
0060bb8f | 307 | " time now : %"PRI_TIME".%03"PRI_USEC"\n" |
3bd7ef83 | 308 | " constant : %"PRI_TIMEX"\n" |
84e51726 | 309 | " offset : %+.3f sec\n" |
66086a40 | 310 | " freq offset : %+"PRI_TIMEX" (%+"PRI_TIMEX" ppm)\n", |
84e51726 | 311 | tmx.status, tmx.status & STA_UNSYNC ? "unsync" : "sync", |
70887c5f | 312 | tmx.time.tv_sec, tmx.time.tv_usec / NSEC_PER_MSEC, |
84e51726 LP |
313 | tmx.constant, |
314 | (double)tmx.offset / NSEC_PER_SEC, | |
66086a40 | 315 | tmx.freq, tmx.freq / 65536); |
84e51726 LP |
316 | |
317 | return 0; | |
318 | } | |
319 | ||
320 | static bool manager_sample_spike_detection(Manager *m, double offset, double delay) { | |
14cb109d | 321 | unsigned i, idx_cur, idx_new, idx_min; |
84e51726 LP |
322 | double jitter; |
323 | double j; | |
324 | ||
325 | assert(m); | |
326 | ||
327 | m->packet_count++; | |
328 | ||
329 | /* ignore initial sample */ | |
330 | if (m->packet_count == 1) | |
331 | return false; | |
332 | ||
333 | /* store the current data in our samples array */ | |
334 | idx_cur = m->samples_idx; | |
335 | idx_new = (idx_cur + 1) % ELEMENTSOF(m->samples); | |
336 | m->samples_idx = idx_new; | |
337 | m->samples[idx_new].offset = offset; | |
338 | m->samples[idx_new].delay = delay; | |
339 | ||
340 | /* calculate new jitter value from the RMS differences relative to the lowest delay sample */ | |
341 | jitter = m->samples_jitter; | |
342 | for (idx_min = idx_cur, i = 0; i < ELEMENTSOF(m->samples); i++) | |
343 | if (m->samples[i].delay > 0 && m->samples[i].delay < m->samples[idx_min].delay) | |
344 | idx_min = i; | |
345 | ||
346 | j = 0; | |
347 | for (i = 0; i < ELEMENTSOF(m->samples); i++) | |
fa66b606 | 348 | j += pow(m->samples[i].offset - m->samples[idx_min].offset, 2); |
84e51726 LP |
349 | m->samples_jitter = sqrt(j / (ELEMENTSOF(m->samples) - 1)); |
350 | ||
351 | /* ignore samples when resyncing */ | |
352 | if (m->poll_resync) | |
353 | return false; | |
354 | ||
355 | /* always accept offset if we are farther off than the round-trip delay */ | |
356 | if (fabs(offset) > delay) | |
357 | return false; | |
358 | ||
359 | /* we need a few samples before looking at them */ | |
360 | if (m->packet_count < 4) | |
361 | return false; | |
362 | ||
363 | /* do not accept anything worse than the maximum possible error of the best sample */ | |
364 | if (fabs(offset) > m->samples[idx_min].delay) | |
365 | return true; | |
366 | ||
367 | /* compare the difference between the current offset to the previous offset and jitter */ | |
368 | return fabs(offset - m->samples[idx_cur].offset) > 3 * jitter; | |
369 | } | |
370 | ||
371 | static void manager_adjust_poll(Manager *m, double offset, bool spike) { | |
372 | assert(m); | |
373 | ||
374 | if (m->poll_resync) { | |
a4465d0d | 375 | m->poll_interval_usec = m->poll_interval_min_usec; |
84e51726 LP |
376 | m->poll_resync = false; |
377 | return; | |
378 | } | |
379 | ||
380 | /* set to minimal poll interval */ | |
381 | if (!spike && fabs(offset) > NTP_ACCURACY_SEC) { | |
a4465d0d | 382 | m->poll_interval_usec = m->poll_interval_min_usec; |
84e51726 LP |
383 | return; |
384 | } | |
385 | ||
386 | /* increase polling interval */ | |
387 | if (fabs(offset) < NTP_ACCURACY_SEC * 0.25) { | |
a4465d0d | 388 | if (m->poll_interval_usec < m->poll_interval_max_usec) |
84e51726 LP |
389 | m->poll_interval_usec *= 2; |
390 | return; | |
391 | } | |
392 | ||
393 | /* decrease polling interval */ | |
394 | if (spike || fabs(offset) > NTP_ACCURACY_SEC * 0.75) { | |
a4465d0d | 395 | if (m->poll_interval_usec > m->poll_interval_min_usec) |
84e51726 LP |
396 | m->poll_interval_usec /= 2; |
397 | return; | |
398 | } | |
399 | } | |
400 | ||
401 | static int manager_receive_response(sd_event_source *source, int fd, uint32_t revents, void *userdata) { | |
402 | Manager *m = userdata; | |
403 | struct ntp_msg ntpmsg; | |
404 | ||
405 | struct iovec iov = { | |
406 | .iov_base = &ntpmsg, | |
407 | .iov_len = sizeof(ntpmsg), | |
408 | }; | |
fb29cdbe | 409 | CMSG_BUFFER_TYPE(CMSG_SPACE(sizeof(struct timeval))) control; |
84e51726 LP |
410 | union sockaddr_union server_addr; |
411 | struct msghdr msghdr = { | |
412 | .msg_iov = &iov, | |
413 | .msg_iovlen = 1, | |
414 | .msg_control = &control, | |
415 | .msg_controllen = sizeof(control), | |
416 | .msg_name = &server_addr, | |
417 | .msg_namelen = sizeof(server_addr), | |
418 | }; | |
419 | struct cmsghdr *cmsg; | |
1cc6c93a | 420 | struct timespec *recv_time = NULL; |
84e51726 LP |
421 | ssize_t len; |
422 | double origin, receive, trans, dest; | |
423 | double delay, offset; | |
3af0442c | 424 | double root_distance; |
84e51726 LP |
425 | bool spike; |
426 | int leap_sec; | |
427 | int r; | |
428 | ||
429 | assert(source); | |
430 | assert(m); | |
431 | ||
432 | if (revents & (EPOLLHUP|EPOLLERR)) { | |
433 | log_warning("Server connection returned error."); | |
434 | return manager_connect(m); | |
435 | } | |
436 | ||
3691bcf3 LP |
437 | len = recvmsg_safe(fd, &msghdr, MSG_DONTWAIT); |
438 | if (len == -EAGAIN) | |
439 | return 0; | |
84e51726 | 440 | if (len < 0) { |
3691bcf3 | 441 | log_warning_errno(len, "Error receiving message, disconnecting: %m"); |
84e51726 LP |
442 | return manager_connect(m); |
443 | } | |
444 | ||
43fcd650 TM |
445 | /* Too short or too long packet? */ |
446 | if (iov.iov_len < sizeof(struct ntp_msg) || (msghdr.msg_flags & MSG_TRUNC)) { | |
84e51726 LP |
447 | log_warning("Invalid response from server. Disconnecting."); |
448 | return manager_connect(m); | |
449 | } | |
450 | ||
451 | if (!m->current_server_name || | |
452 | !m->current_server_address || | |
453 | !sockaddr_equal(&server_addr, &m->current_server_address->sockaddr)) { | |
454 | log_debug("Response from unknown server."); | |
455 | return 0; | |
456 | } | |
457 | ||
2a1288ff | 458 | CMSG_FOREACH(cmsg, &msghdr) { |
84e51726 LP |
459 | if (cmsg->cmsg_level != SOL_SOCKET) |
460 | continue; | |
461 | ||
462 | switch (cmsg->cmsg_type) { | |
487a3682 ML |
463 | case SCM_TIMESTAMPNS: |
464 | recv_time = (struct timespec *) CMSG_DATA(cmsg); | |
84e51726 LP |
465 | break; |
466 | } | |
467 | } | |
baaa35ad ZJS |
468 | if (!recv_time) |
469 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
470 | "Invalid packet timestamp."); | |
84e51726 LP |
471 | |
472 | if (!m->pending) { | |
473 | log_debug("Unexpected reply. Ignoring."); | |
474 | return 0; | |
475 | } | |
476 | ||
e8206972 ML |
477 | m->missed_replies = 0; |
478 | ||
84e51726 LP |
479 | /* check our "time cookie" (we just stored nanoseconds in the fraction field) */ |
480 | if (be32toh(ntpmsg.origin_time.sec) != m->trans_time.tv_sec + OFFSET_1900_1970 || | |
edd50d5e | 481 | be32toh(ntpmsg.origin_time.frac) != (unsigned long) m->trans_time.tv_nsec) { |
84e51726 LP |
482 | log_debug("Invalid reply; not our transmit time. Ignoring."); |
483 | return 0; | |
484 | } | |
485 | ||
486 | m->event_timeout = sd_event_source_unref(m->event_timeout); | |
487 | ||
488 | if (be32toh(ntpmsg.recv_time.sec) < TIME_EPOCH + OFFSET_1900_1970 || | |
489 | be32toh(ntpmsg.trans_time.sec) < TIME_EPOCH + OFFSET_1900_1970) { | |
490 | log_debug("Invalid reply, returned times before epoch. Ignoring."); | |
491 | return manager_connect(m); | |
492 | } | |
493 | ||
07610e10 ML |
494 | if (NTP_FIELD_LEAP(ntpmsg.field) == NTP_LEAP_NOTINSYNC || |
495 | ntpmsg.stratum == 0 || ntpmsg.stratum >= 16) { | |
84e51726 LP |
496 | log_debug("Server is not synchronized. Disconnecting."); |
497 | return manager_connect(m); | |
498 | } | |
499 | ||
500 | if (!IN_SET(NTP_FIELD_VERSION(ntpmsg.field), 3, 4)) { | |
501 | log_debug("Response NTPv%d. Disconnecting.", NTP_FIELD_VERSION(ntpmsg.field)); | |
502 | return manager_connect(m); | |
503 | } | |
504 | ||
505 | if (NTP_FIELD_MODE(ntpmsg.field) != NTP_MODE_SERVER) { | |
506 | log_debug("Unsupported mode %d. Disconnecting.", NTP_FIELD_MODE(ntpmsg.field)); | |
507 | return manager_connect(m); | |
508 | } | |
509 | ||
3af0442c | 510 | root_distance = ntp_ts_short_to_d(&ntpmsg.root_delay) / 2 + ntp_ts_short_to_d(&ntpmsg.root_dispersion); |
f907cc16 | 511 | if (root_distance > (double) m->max_root_distance_usec / (double) USEC_PER_SEC) { |
ce96c9cb | 512 | log_info("Server has too large root distance. Disconnecting."); |
3af0442c ML |
513 | return manager_connect(m); |
514 | } | |
515 | ||
84e51726 LP |
516 | /* valid packet */ |
517 | m->pending = false; | |
ab4df227 | 518 | m->retry_interval = 0; |
84e51726 | 519 | |
7b628891 | 520 | /* Stop listening */ |
f89c4e15 | 521 | manager_listen_stop(m); |
7b628891 | 522 | |
84e51726 LP |
523 | /* announce leap seconds */ |
524 | if (NTP_FIELD_LEAP(ntpmsg.field) & NTP_LEAP_PLUSSEC) | |
525 | leap_sec = 1; | |
526 | else if (NTP_FIELD_LEAP(ntpmsg.field) & NTP_LEAP_MINUSSEC) | |
527 | leap_sec = -1; | |
528 | else | |
529 | leap_sec = 0; | |
530 | ||
531 | /* | |
532 | * "Timestamp Name ID When Generated | |
533 | * ------------------------------------------------------------ | |
534 | * Originate Timestamp T1 time request sent by client | |
535 | * Receive Timestamp T2 time request received by server | |
536 | * Transmit Timestamp T3 time reply sent by server | |
537 | * Destination Timestamp T4 time reply received by client | |
538 | * | |
539 | * The round-trip delay, d, and system clock offset, t, are defined as: | |
540 | * d = (T4 - T1) - (T3 - T2) t = ((T2 - T1) + (T3 - T4)) / 2" | |
541 | */ | |
73c76e63 | 542 | origin = ts_to_d(&m->trans_time) + OFFSET_1900_1970; |
84e51726 LP |
543 | receive = ntp_ts_to_d(&ntpmsg.recv_time); |
544 | trans = ntp_ts_to_d(&ntpmsg.trans_time); | |
487a3682 | 545 | dest = ts_to_d(recv_time) + OFFSET_1900_1970; |
84e51726 LP |
546 | |
547 | offset = ((receive - origin) + (trans - dest)) / 2; | |
548 | delay = (dest - origin) - (trans - receive); | |
549 | ||
550 | spike = manager_sample_spike_detection(m, offset, delay); | |
551 | ||
552 | manager_adjust_poll(m, offset, spike); | |
553 | ||
554 | log_debug("NTP response:\n" | |
555 | " leap : %u\n" | |
556 | " version : %u\n" | |
557 | " mode : %u\n" | |
558 | " stratum : %u\n" | |
559 | " precision : %.6f sec (%d)\n" | |
3af0442c | 560 | " root distance: %.6f sec\n" |
84e51726 LP |
561 | " reference : %.4s\n" |
562 | " origin : %.3f\n" | |
563 | " receive : %.3f\n" | |
564 | " transmit : %.3f\n" | |
565 | " dest : %.3f\n" | |
566 | " offset : %+.3f sec\n" | |
567 | " delay : %+.3f sec\n" | |
568 | " packet count : %"PRIu64"\n" | |
569 | " jitter : %.3f%s\n" | |
570 | " poll interval: " USEC_FMT "\n", | |
571 | NTP_FIELD_LEAP(ntpmsg.field), | |
572 | NTP_FIELD_VERSION(ntpmsg.field), | |
573 | NTP_FIELD_MODE(ntpmsg.field), | |
574 | ntpmsg.stratum, | |
575 | exp2(ntpmsg.precision), ntpmsg.precision, | |
3af0442c | 576 | root_distance, |
84e51726 LP |
577 | ntpmsg.stratum == 1 ? ntpmsg.refid : "n/a", |
578 | origin - OFFSET_1900_1970, | |
579 | receive - OFFSET_1900_1970, | |
580 | trans - OFFSET_1900_1970, | |
581 | dest - OFFSET_1900_1970, | |
582 | offset, delay, | |
583 | m->packet_count, | |
584 | m->samples_jitter, spike ? " spike" : "", | |
585 | m->poll_interval_usec / USEC_PER_SEC); | |
586 | ||
587 | if (!spike) { | |
588 | m->sync = true; | |
589 | r = manager_adjust_clock(m, offset, leap_sec); | |
590 | if (r < 0) | |
6ff6f4d8 | 591 | log_error_errno(r, "Failed to call clock_adjtime(): %m"); |
84e51726 LP |
592 | } |
593 | ||
66086a40 YW |
594 | /* Save NTP response */ |
595 | m->ntpmsg = ntpmsg; | |
596 | m->origin_time = m->trans_time; | |
597 | m->dest_time = *recv_time; | |
598 | m->spike = spike; | |
599 | ||
75ca1621 | 600 | log_debug("interval/delta/delay/jitter/drift " USEC_FMT "s/%+.3fs/%.3fs/%.3fs/%+"PRIi64"ppm%s", |
66086a40 | 601 | m->poll_interval_usec / USEC_PER_SEC, offset, delay, m->samples_jitter, m->drift_freq / 65536, |
7b5b3fc3 | 602 | spike ? " (ignored)" : ""); |
84e51726 | 603 | |
66086a40 YW |
604 | (void) sd_bus_emit_properties_changed(m->bus, "/org/freedesktop/timesync1", "org.freedesktop.timesync1.Manager", "NTPMessage", NULL); |
605 | ||
481b3f9e LP |
606 | if (!m->good) { |
607 | _cleanup_free_ char *pretty = NULL; | |
608 | ||
609 | m->good = true; | |
610 | ||
611 | server_address_pretty(m->current_server_address, &pretty); | |
37afb0ac | 612 | /* "Initial", as further successful syncs will not be logged. */ |
613 | log_info("Initial synchronization to time server %s (%s).", strna(pretty), m->current_server_name->string); | |
614 | sd_notifyf(false, "STATUS=Initial synchronization to time server %s (%s).", strna(pretty), m->current_server_name->string); | |
481b3f9e LP |
615 | } |
616 | ||
84e51726 | 617 | r = manager_arm_timer(m, m->poll_interval_usec); |
f647962d MS |
618 | if (r < 0) |
619 | return log_error_errno(r, "Failed to rearm timer: %m"); | |
84e51726 LP |
620 | |
621 | return 0; | |
622 | } | |
623 | ||
624 | static int manager_listen_setup(Manager *m) { | |
625 | union sockaddr_union addr = {}; | |
84e51726 LP |
626 | int r; |
627 | ||
628 | assert(m); | |
629 | ||
f89c4e15 LP |
630 | if (m->server_socket >= 0) |
631 | return 0; | |
632 | ||
84e51726 LP |
633 | assert(!m->event_receive); |
634 | assert(m->current_server_address); | |
635 | ||
636 | addr.sa.sa_family = m->current_server_address->sockaddr.sa.sa_family; | |
637 | ||
638 | m->server_socket = socket(addr.sa.sa_family, SOCK_DGRAM | SOCK_CLOEXEC, 0); | |
639 | if (m->server_socket < 0) | |
640 | return -errno; | |
641 | ||
642 | r = bind(m->server_socket, &addr.sa, m->current_server_address->socklen); | |
643 | if (r < 0) | |
644 | return -errno; | |
645 | ||
2ff48e98 | 646 | r = setsockopt_int(m->server_socket, SOL_SOCKET, SO_TIMESTAMPNS, true); |
84e51726 | 647 | if (r < 0) |
2ff48e98 | 648 | return r; |
84e51726 | 649 | |
00df39a5 LP |
650 | if (addr.sa.sa_family == AF_INET) |
651 | (void) setsockopt_int(m->server_socket, IPPROTO_IP, IP_TOS, IPTOS_LOWDELAY); | |
84e51726 LP |
652 | |
653 | return sd_event_add_io(m->event, &m->event_receive, m->server_socket, EPOLLIN, manager_receive_response, m); | |
654 | } | |
655 | ||
f89c4e15 LP |
656 | static void manager_listen_stop(Manager *m) { |
657 | assert(m); | |
658 | ||
659 | m->event_receive = sd_event_source_unref(m->event_receive); | |
660 | m->server_socket = safe_close(m->server_socket); | |
661 | } | |
662 | ||
84e51726 LP |
663 | static int manager_begin(Manager *m) { |
664 | _cleanup_free_ char *pretty = NULL; | |
665 | int r; | |
666 | ||
667 | assert(m); | |
668 | assert_return(m->current_server_name, -EHOSTUNREACH); | |
669 | assert_return(m->current_server_address, -EHOSTUNREACH); | |
670 | ||
481b3f9e | 671 | m->good = false; |
e8206972 | 672 | m->missed_replies = NTP_MAX_MISSED_REPLIES; |
80cd2606 | 673 | if (m->poll_interval_usec == 0) |
a4465d0d | 674 | m->poll_interval_usec = m->poll_interval_min_usec; |
84e51726 LP |
675 | |
676 | server_address_pretty(m->current_server_address, &pretty); | |
481b3f9e LP |
677 | log_debug("Connecting to time server %s (%s).", strna(pretty), m->current_server_name->string); |
678 | sd_notifyf(false, "STATUS=Connecting to time server %s (%s).", strna(pretty), m->current_server_name->string); | |
84e51726 | 679 | |
84e51726 LP |
680 | r = manager_clock_watch_setup(m); |
681 | if (r < 0) | |
682 | return r; | |
683 | ||
684 | return manager_send_request(m); | |
685 | } | |
686 | ||
874ff7bf LP |
687 | void manager_set_server_name(Manager *m, ServerName *n) { |
688 | assert(m); | |
84e51726 | 689 | |
874ff7bf LP |
690 | if (m->current_server_name == n) |
691 | return; | |
84e51726 | 692 | |
874ff7bf LP |
693 | m->current_server_name = n; |
694 | m->current_server_address = NULL; | |
695 | ||
696 | manager_disconnect(m); | |
84e51726 | 697 | |
874ff7bf LP |
698 | if (n) |
699 | log_debug("Selected server %s.", n->string); | |
700 | } | |
84e51726 | 701 | |
874ff7bf | 702 | void manager_set_server_address(Manager *m, ServerAddress *a) { |
84e51726 LP |
703 | assert(m); |
704 | ||
874ff7bf LP |
705 | if (m->current_server_address == a) |
706 | return; | |
707 | ||
874ff7bf | 708 | m->current_server_address = a; |
20f8d3cf SN |
709 | /* If a is NULL, we are just clearing the address, without |
710 | * changing the name. Keep the existing name in that case. */ | |
711 | if (a) | |
712 | m->current_server_name = a->name; | |
874ff7bf LP |
713 | |
714 | manager_disconnect(m); | |
715 | ||
716 | if (a) { | |
717 | _cleanup_free_ char *pretty = NULL; | |
718 | server_address_pretty(a, &pretty); | |
719 | log_debug("Selected address %s of server %s.", strna(pretty), a->name->string); | |
84e51726 LP |
720 | } |
721 | } | |
722 | ||
7082bb05 | 723 | static int manager_resolve_handler(sd_resolve_query *q, int ret, const struct addrinfo *ai, Manager *m) { |
874ff7bf | 724 | int r; |
84e51726 LP |
725 | |
726 | assert(q); | |
727 | assert(m); | |
728 | assert(m->current_server_name); | |
729 | ||
730 | m->resolve_query = sd_resolve_query_unref(m->resolve_query); | |
731 | ||
732 | if (ret != 0) { | |
733 | log_debug("Failed to resolve %s: %s", m->current_server_name->string, gai_strerror(ret)); | |
734 | ||
735 | /* Try next host */ | |
736 | return manager_connect(m); | |
737 | } | |
738 | ||
84e51726 LP |
739 | for (; ai; ai = ai->ai_next) { |
740 | _cleanup_free_ char *pretty = NULL; | |
874ff7bf | 741 | ServerAddress *a; |
84e51726 LP |
742 | |
743 | assert(ai->ai_addr); | |
744 | assert(ai->ai_addrlen >= offsetof(struct sockaddr, sa_data)); | |
84e51726 LP |
745 | |
746 | if (!IN_SET(ai->ai_addr->sa_family, AF_INET, AF_INET6)) { | |
747 | log_warning("Unsuitable address protocol for %s", m->current_server_name->string); | |
748 | continue; | |
749 | } | |
750 | ||
874ff7bf | 751 | r = server_address_new(m->current_server_name, &a, (const union sockaddr_union*) ai->ai_addr, ai->ai_addrlen); |
f647962d MS |
752 | if (r < 0) |
753 | return log_error_errno(r, "Failed to add server address: %m"); | |
84e51726 | 754 | |
874ff7bf | 755 | server_address_pretty(a, &pretty); |
84e51726 LP |
756 | log_debug("Resolved address %s for %s.", pretty, m->current_server_name->string); |
757 | } | |
758 | ||
759 | if (!m->current_server_name->addresses) { | |
760 | log_error("Failed to find suitable address for host %s.", m->current_server_name->string); | |
761 | ||
762 | /* Try next host */ | |
763 | return manager_connect(m); | |
764 | } | |
765 | ||
874ff7bf | 766 | manager_set_server_address(m, m->current_server_name->addresses); |
84e51726 LP |
767 | |
768 | return manager_begin(m); | |
769 | } | |
770 | ||
874ff7bf | 771 | static int manager_retry_connect(sd_event_source *source, usec_t usec, void *userdata) { |
84e51726 LP |
772 | Manager *m = userdata; |
773 | ||
774 | assert(m); | |
775 | ||
776 | return manager_connect(m); | |
777 | } | |
778 | ||
779 | int manager_connect(Manager *m) { | |
84e51726 LP |
780 | int r; |
781 | ||
782 | assert(m); | |
783 | ||
784 | manager_disconnect(m); | |
785 | ||
786 | m->event_retry = sd_event_source_unref(m->event_retry); | |
7994ac1d | 787 | if (!ratelimit_below(&m->ratelimit)) { |
a9061d97 | 788 | log_debug("Delaying attempts to contact servers."); |
84e51726 | 789 | |
39cf0351 | 790 | r = sd_event_add_time_relative(m->event, &m->event_retry, clock_boottime_or_monotonic(), RETRY_USEC, 0, manager_retry_connect, m); |
f647962d MS |
791 | if (r < 0) |
792 | return log_error_errno(r, "Failed to create retry timer: %m"); | |
84e51726 LP |
793 | |
794 | return 0; | |
795 | } | |
796 | ||
797 | /* If we already are operating on some address, switch to the | |
798 | * next one. */ | |
799 | if (m->current_server_address && m->current_server_address->addresses_next) | |
874ff7bf | 800 | manager_set_server_address(m, m->current_server_address->addresses_next); |
84e51726 | 801 | else { |
874ff7bf LP |
802 | struct addrinfo hints = { |
803 | .ai_flags = AI_NUMERICSERV|AI_ADDRCONFIG, | |
804 | .ai_socktype = SOCK_DGRAM, | |
805 | }; | |
84e51726 | 806 | |
874ff7bf | 807 | /* Hmm, we are through all addresses, let's look for the next host instead */ |
84e51726 | 808 | if (m->current_server_name && m->current_server_name->names_next) |
874ff7bf | 809 | manager_set_server_name(m, m->current_server_name->names_next); |
84e51726 | 810 | else { |
874ff7bf | 811 | ServerName *f; |
63463bf0 | 812 | bool restart = true; |
874ff7bf LP |
813 | |
814 | /* Our current server name list is exhausted, | |
815 | * let's find the next one to iterate. First | |
816 | * we try the system list, then the link list. | |
817 | * After having processed the link list we | |
818 | * jump back to the system list. However, if | |
819 | * both lists are empty, we change to the | |
820 | * fallback list. */ | |
821 | if (!m->current_server_name || m->current_server_name->type == SERVER_LINK) { | |
822 | f = m->system_servers; | |
823 | if (!f) | |
824 | f = m->link_servers; | |
825 | } else { | |
826 | f = m->link_servers; | |
827 | if (!f) | |
828 | f = m->system_servers; | |
63463bf0 ML |
829 | else |
830 | restart = false; | |
874ff7bf LP |
831 | } |
832 | ||
833 | if (!f) | |
834 | f = m->fallback_servers; | |
835 | ||
836 | if (!f) { | |
837 | manager_set_server_name(m, NULL); | |
84e51726 LP |
838 | log_debug("No server found."); |
839 | return 0; | |
840 | } | |
841 | ||
63463bf0 ML |
842 | if (restart && !m->exhausted_servers && m->poll_interval_usec) { |
843 | log_debug("Waiting after exhausting servers."); | |
39cf0351 | 844 | r = sd_event_add_time_relative(m->event, &m->event_retry, clock_boottime_or_monotonic(), m->poll_interval_usec, 0, manager_retry_connect, m); |
f647962d MS |
845 | if (r < 0) |
846 | return log_error_errno(r, "Failed to create retry timer: %m"); | |
63463bf0 ML |
847 | |
848 | m->exhausted_servers = true; | |
849 | ||
850 | /* Increase the polling interval */ | |
a4465d0d | 851 | if (m->poll_interval_usec < m->poll_interval_max_usec) |
63463bf0 ML |
852 | m->poll_interval_usec *= 2; |
853 | ||
854 | return 0; | |
855 | } | |
856 | ||
857 | m->exhausted_servers = false; | |
858 | ||
874ff7bf | 859 | manager_set_server_name(m, f); |
84e51726 LP |
860 | } |
861 | ||
862 | /* Tell the resolver to reread /etc/resolv.conf, in | |
863 | * case it changed. */ | |
864 | res_init(); | |
865 | ||
874ff7bf LP |
866 | /* Flush out any previously resolved addresses */ |
867 | server_name_flush_addresses(m->current_server_name); | |
868 | ||
869 | log_debug("Resolving %s...", m->current_server_name->string); | |
870 | ||
7082bb05 | 871 | r = resolve_getaddrinfo(m->resolve, &m->resolve_query, m->current_server_name->string, "123", &hints, manager_resolve_handler, NULL, m); |
f647962d MS |
872 | if (r < 0) |
873 | return log_error_errno(r, "Failed to create resolver: %m"); | |
84e51726 LP |
874 | |
875 | return 1; | |
876 | } | |
877 | ||
878 | r = manager_begin(m); | |
879 | if (r < 0) | |
880 | return r; | |
881 | ||
882 | return 1; | |
883 | } | |
884 | ||
84e51726 LP |
885 | void manager_disconnect(Manager *m) { |
886 | assert(m); | |
887 | ||
888 | m->resolve_query = sd_resolve_query_unref(m->resolve_query); | |
889 | ||
890 | m->event_timer = sd_event_source_unref(m->event_timer); | |
891 | ||
f89c4e15 | 892 | manager_listen_stop(m); |
84e51726 LP |
893 | |
894 | m->event_clock_watch = sd_event_source_unref(m->event_clock_watch); | |
895 | m->clock_watch_fd = safe_close(m->clock_watch_fd); | |
896 | ||
897 | m->event_timeout = sd_event_source_unref(m->event_timeout); | |
898 | ||
899 | sd_notifyf(false, "STATUS=Idle."); | |
900 | } | |
901 | ||
874ff7bf LP |
902 | void manager_flush_server_names(Manager *m, ServerType t) { |
903 | assert(m); | |
904 | ||
905 | if (t == SERVER_SYSTEM) | |
906 | while (m->system_servers) | |
907 | server_name_free(m->system_servers); | |
908 | ||
909 | if (t == SERVER_LINK) | |
910 | while (m->link_servers) | |
911 | server_name_free(m->link_servers); | |
912 | ||
913 | if (t == SERVER_FALLBACK) | |
914 | while (m->fallback_servers) | |
915 | server_name_free(m->fallback_servers); | |
916 | } | |
84e51726 LP |
917 | |
918 | void manager_free(Manager *m) { | |
919 | if (!m) | |
920 | return; | |
921 | ||
922 | manager_disconnect(m); | |
874ff7bf LP |
923 | manager_flush_server_names(m, SERVER_SYSTEM); |
924 | manager_flush_server_names(m, SERVER_LINK); | |
925 | manager_flush_server_names(m, SERVER_FALLBACK); | |
84e51726 LP |
926 | |
927 | sd_event_source_unref(m->event_retry); | |
928 | ||
929 | sd_event_source_unref(m->network_event_source); | |
930 | sd_network_monitor_unref(m->network_monitor); | |
931 | ||
932 | sd_resolve_unref(m->resolve); | |
933 | sd_event_unref(m->event); | |
934 | ||
92e31da1 | 935 | sd_bus_flush_close_unref(m->bus); |
e7dd3947 | 936 | |
84e51726 LP |
937 | free(m); |
938 | } | |
939 | ||
874ff7bf LP |
940 | static int manager_network_read_link_servers(Manager *m) { |
941 | _cleanup_strv_free_ char **ntp = NULL; | |
942 | ServerName *n, *nx; | |
943 | char **i; | |
3e85ec07 | 944 | bool changed = false; |
874ff7bf LP |
945 | int r; |
946 | ||
84e51726 LP |
947 | assert(m); |
948 | ||
874ff7bf | 949 | r = sd_network_get_ntp(&ntp); |
ba0c011e YW |
950 | if (r < 0) { |
951 | if (r == -ENOMEM) | |
952 | log_oom(); | |
953 | else | |
954 | log_debug_errno(r, "Failed to get link NTP servers: %m"); | |
874ff7bf | 955 | goto clear; |
ba0c011e | 956 | } |
874ff7bf LP |
957 | |
958 | LIST_FOREACH(names, n, m->link_servers) | |
959 | n->marked = true; | |
960 | ||
961 | STRV_FOREACH(i, ntp) { | |
962 | bool found = false; | |
963 | ||
dcb37458 YW |
964 | r = dns_name_is_valid_or_address(*i); |
965 | if (r < 0) { | |
966 | log_error_errno(r, "Failed to check validity of NTP server name or address '%s': %m", *i); | |
967 | goto clear; | |
968 | } else if (r == 0) { | |
969 | log_error("Invalid NTP server name or address, ignoring: %s", *i); | |
970 | continue; | |
971 | } | |
972 | ||
874ff7bf LP |
973 | LIST_FOREACH(names, n, m->link_servers) |
974 | if (streq(n->string, *i)) { | |
975 | n->marked = false; | |
976 | found = true; | |
977 | break; | |
978 | } | |
979 | ||
980 | if (!found) { | |
981 | r = server_name_new(m, NULL, SERVER_LINK, *i); | |
ba0c011e YW |
982 | if (r < 0) { |
983 | log_oom(); | |
874ff7bf | 984 | goto clear; |
ba0c011e | 985 | } |
3e85ec07 YW |
986 | |
987 | changed = true; | |
874ff7bf LP |
988 | } |
989 | } | |
990 | ||
991 | LIST_FOREACH_SAFE(names, n, nx, m->link_servers) | |
3e85ec07 | 992 | if (n->marked) { |
874ff7bf | 993 | server_name_free(n); |
3e85ec07 YW |
994 | changed = true; |
995 | } | |
874ff7bf | 996 | |
3e85ec07 | 997 | return changed; |
874ff7bf LP |
998 | |
999 | clear: | |
1000 | manager_flush_server_names(m, SERVER_LINK); | |
1001 | return r; | |
84e51726 LP |
1002 | } |
1003 | ||
0630eb1b YW |
1004 | static bool manager_is_connected(Manager *m) { |
1005 | /* Return true when the manager is sending a request, resolving a server name, or | |
1006 | * in a poll interval. */ | |
1007 | return m->server_socket >= 0 || m->resolve_query || m->event_timer; | |
1008 | } | |
1009 | ||
84e51726 LP |
1010 | static int manager_network_event_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
1011 | Manager *m = userdata; | |
3e85ec07 | 1012 | bool changed, connected, online; |
84e51726 LP |
1013 | int r; |
1014 | ||
1015 | assert(m); | |
1016 | ||
1017 | sd_network_monitor_flush(m->network_monitor); | |
1018 | ||
ba0c011e | 1019 | /* When manager_network_read_link_servers() failed, we assume that the servers are changed. */ |
55033662 | 1020 | changed = manager_network_read_link_servers(m); |
874ff7bf | 1021 | |
84e51726 LP |
1022 | /* check if the machine is online */ |
1023 | online = network_is_online(); | |
1024 | ||
1025 | /* check if the client is currently connected */ | |
0630eb1b | 1026 | connected = manager_is_connected(m); |
84e51726 LP |
1027 | |
1028 | if (connected && !online) { | |
1029 | log_info("No network connectivity, watching for changes."); | |
1030 | manager_disconnect(m); | |
1031 | ||
0630eb1b | 1032 | } else if ((!connected || changed) && online) { |
84e51726 LP |
1033 | log_info("Network configuration changed, trying to establish connection."); |
1034 | ||
1035 | if (m->current_server_address) | |
1036 | r = manager_begin(m); | |
1037 | else | |
1038 | r = manager_connect(m); | |
1039 | if (r < 0) | |
1040 | return r; | |
1041 | } | |
1042 | ||
1043 | return 0; | |
1044 | } | |
1045 | ||
1046 | static int manager_network_monitor_listen(Manager *m) { | |
1047 | int r, fd, events; | |
1048 | ||
1049 | assert(m); | |
1050 | ||
1051 | r = sd_network_monitor_new(&m->network_monitor, NULL); | |
36484c03 | 1052 | if (r == -ENOENT) { |
f95b0be7 | 1053 | log_info("systemd does not appear to be running, not listening for systemd-networkd events."); |
36484c03 ZJS |
1054 | return 0; |
1055 | } | |
84e51726 LP |
1056 | if (r < 0) |
1057 | return r; | |
1058 | ||
1059 | fd = sd_network_monitor_get_fd(m->network_monitor); | |
1060 | if (fd < 0) | |
1061 | return fd; | |
1062 | ||
1063 | events = sd_network_monitor_get_events(m->network_monitor); | |
1064 | if (events < 0) | |
1065 | return events; | |
1066 | ||
1067 | r = sd_event_add_io(m->event, &m->network_event_source, fd, events, manager_network_event_handler, m); | |
1068 | if (r < 0) | |
1069 | return r; | |
1070 | ||
1071 | return 0; | |
1072 | } | |
1073 | ||
1074 | int manager_new(Manager **ret) { | |
1075 | _cleanup_(manager_freep) Manager *m = NULL; | |
1076 | int r; | |
1077 | ||
1078 | assert(ret); | |
1079 | ||
1080 | m = new0(Manager, 1); | |
1081 | if (!m) | |
1082 | return -ENOMEM; | |
1083 | ||
f907cc16 | 1084 | m->max_root_distance_usec = NTP_MAX_ROOT_DISTANCE; |
a4465d0d YW |
1085 | m->poll_interval_min_usec = NTP_POLL_INTERVAL_MIN_USEC; |
1086 | m->poll_interval_max_usec = NTP_POLL_INTERVAL_MAX_USEC; | |
f907cc16 | 1087 | |
84e51726 LP |
1088 | m->server_socket = m->clock_watch_fd = -1; |
1089 | ||
8c227e7f | 1090 | m->ratelimit = (RateLimit) { RATELIMIT_INTERVAL_USEC, RATELIMIT_BURST }; |
84e51726 | 1091 | |
84e51726 LP |
1092 | r = sd_event_default(&m->event); |
1093 | if (r < 0) | |
1094 | return r; | |
1095 | ||
8b7140db YW |
1096 | (void) sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL); |
1097 | (void) sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL); | |
84e51726 | 1098 | |
8b7140db | 1099 | (void) sd_event_set_watchdog(m->event, true); |
84e51726 LP |
1100 | |
1101 | r = sd_resolve_default(&m->resolve); | |
1102 | if (r < 0) | |
1103 | return r; | |
1104 | ||
1105 | r = sd_resolve_attach_event(m->resolve, m->event, 0); | |
1106 | if (r < 0) | |
1107 | return r; | |
1108 | ||
1109 | r = manager_network_monitor_listen(m); | |
1110 | if (r < 0) | |
1111 | return r; | |
1112 | ||
ba0c011e | 1113 | (void) manager_network_read_link_servers(m); |
874ff7bf | 1114 | |
1cc6c93a | 1115 | *ret = TAKE_PTR(m); |
84e51726 LP |
1116 | |
1117 | return 0; | |
1118 | } |