1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

8bdbb8d9cbe1d35708385573d70984ab4533812dLennart Poettering#include <stdlib.h>

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include <errno.h>

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include <fcntl.h>

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include <unistd.h>

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include <string.h>

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include <time.h>

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include <math.h>

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering#include <arpa/inet.h>

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering#include <netinet/in.h>

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering#include <netinet/ip.h>

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering#include <sys/timerfd.h>

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include <sys/timex.h>

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen#include <sys/socket.h>

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include <resolv.h>

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include <sys/prctl.h>

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include <sys/types.h>

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include <grp.h>

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen#include "missing.h"

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include "util.h"

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include "sparse-endian.h"

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering#include "log.h"

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include "socket-util.h"

9d12709626bccc0cae677a7035f62efe6aabb4abLennart Poettering#include "list.h"

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering#include "ratelimit.h"

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include "strv.h"

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include "conf-parser.h"

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include "sd-daemon.h"

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include "event-util.h"

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include "network-util.h"

e56056e93d33619a3acf13e483900b4f8938228fThomas Hindoe Paaboel Andersen#include "clock-util.h"

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include "capability.h"

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include "mkdir.h"

d21ed1ead18d16d35c30299a69d3366847f8a039Lennart Poettering#include "timesyncd-conf.h"

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include "timesyncd-manager.h"

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include "time-util.h"

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#ifndef ADJ_SETOFFSET

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#define ADJ_SETOFFSET 0x0100 /* add 'time' to current time */

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#endif

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#define NTP_ACCURACY_SEC 0.2

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen#define NTP_POLL_INTERVAL_MIN_SEC 32

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#define NTP_POLL_INTERVAL_MAX_SEC 2048

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen#define NTP_MAX_ADJUST 0.4

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen#define NTP_LEAP_PLUSSEC 1

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen#define NTP_LEAP_MINUSSEC 2

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen#define NTP_LEAP_NOTINSYNC 3

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen#define NTP_MODE_CLIENT 3

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen#define NTP_MODE_SERVER 4

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen#define NTP_FIELD_LEAP(f) (((f) >> 6) & 3)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#define NTP_FIELD_VERSION(f) (((f) >> 3) & 7)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#define NTP_FIELD_MODE(f) ((f) & 7)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#define NTP_FIELD(l, v, m) (((l) << 6) | ((v) << 3) | (m))

e56056e93d33619a3acf13e483900b4f8938228fThomas Hindoe Paaboel Andersen

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#define NTP_MAX_ROOT_DISTANCE 5.0

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen

5b30bef856e89a571df57b7b953e9a1409d9acedLennart Poettering#define NTP_MAX_MISSED_REPLIES 2

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#define OFFSET_1900_1970 2208988800UL

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen

5b30bef856e89a571df57b7b953e9a1409d9acedLennart Poettering#define RETRY_USEC (30*USEC_PER_SEC)

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen#define RATELIMIT_INTERVAL_USEC (10*USEC_PER_SEC)

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen#define RATELIMIT_BURST 10

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen

5b30bef856e89a571df57b7b953e9a1409d9acedLennart Poettering#define TIMEOUT_USEC (10*USEC_PER_SEC)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

e56056e93d33619a3acf13e483900b4f8938228fThomas Hindoe Paaboel Andersenstruct ntp_ts {

e56056e93d33619a3acf13e483900b4f8938228fThomas Hindoe Paaboel Andersen be32_t sec;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering be32_t frac;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering} _packed_;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringstruct ntp_ts_short {

89f7c8465cd1ab37347dd0c15920bce31e8225dfLennart Poettering be16_t sec;

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen be16_t frac;

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen} _packed_;

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poetteringstruct ntp_msg {

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering uint8_t field;

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering uint8_t stratum;

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering int8_t poll;

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering int8_t precision;

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering struct ntp_ts_short root_delay;

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering struct ntp_ts_short root_dispersion;

d21ed1ead18d16d35c30299a69d3366847f8a039Lennart Poettering char refid[4];

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering struct ntp_ts reference_time;

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering struct ntp_ts origin_time;

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering struct ntp_ts recv_time;

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering struct ntp_ts trans_time;

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering} _packed_;

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering

a7893c6b28772edbc7e1fea3c209caa54d465648Lennart Poetteringstatic int manager_arm_timer(Manager *m, usec_t next);

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poetteringstatic int manager_clock_watch_setup(Manager *m);

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poetteringstatic double ntp_ts_short_to_d(const struct ntp_ts_short *ts) {

89f7c8465cd1ab37347dd0c15920bce31e8225dfLennart Poettering return be16toh(ts->sec) + (be16toh(ts->frac) / 65536.0);

a7893c6b28772edbc7e1fea3c209caa54d465648Lennart Poettering}

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersenstatic double ntp_ts_to_d(const struct ntp_ts *ts) {

a7893c6b28772edbc7e1fea3c209caa54d465648Lennart Poettering return be32toh(ts->sec) + ((double)be32toh(ts->frac) / UINT_MAX);

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering}

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poetteringstatic double ts_to_d(const struct timespec *ts) {

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering return ts->tv_sec + (1.0e-9 * ts->tv_nsec);

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering}

a7893c6b28772edbc7e1fea3c209caa54d465648Lennart Poettering

5b30bef856e89a571df57b7b953e9a1409d9acedLennart Poetteringstatic double square(double d) {

5b30bef856e89a571df57b7b953e9a1409d9acedLennart Poettering return d * d;

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering}

9d12709626bccc0cae677a7035f62efe6aabb4abLennart Poettering

9d12709626bccc0cae677a7035f62efe6aabb4abLennart Poetteringstatic int manager_timeout(sd_event_source *source, usec_t usec, void *userdata) {

9d12709626bccc0cae677a7035f62efe6aabb4abLennart Poettering _cleanup_free_ char *pretty = NULL;

9d12709626bccc0cae677a7035f62efe6aabb4abLennart Poettering Manager *m = userdata;

9d12709626bccc0cae677a7035f62efe6aabb4abLennart Poettering

9d12709626bccc0cae677a7035f62efe6aabb4abLennart Poettering assert(m);

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering assert(m->current_server_name);

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering assert(m->current_server_address);

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering server_address_pretty(m->current_server_address, &pretty);

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering log_info("Timed out waiting for reply from %s (%s).", strna(pretty), m->current_server_name->string);

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering return manager_connect(m);

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering}

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poetteringstatic int manager_send_request(Manager *m) {

9d12709626bccc0cae677a7035f62efe6aabb4abLennart Poettering _cleanup_free_ char *pretty = NULL;

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering struct ntp_msg ntpmsg = {

aa1936ea1a89c2bb968ba33e3274898a4eeae771Lennart Poettering /*

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering .field = NTP_FIELD(0, 4, NTP_MODE_CLIENT),

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering };

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering ssize_t len;

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering int r;

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering assert(m);

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering assert(m->current_server_name);

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering assert(m->current_server_address);

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering m->event_timeout = sd_event_source_unref(m->event_timeout);

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering /*

0dd25fb9f005d8ab7ac4bc10a609d00569f8c56aLennart Poettering assert_se(clock_gettime(clock_boottime_or_monotonic(), &m->trans_time_mon) >= 0);

0dd25fb9f005d8ab7ac4bc10a609d00569f8c56aLennart Poettering assert_se(clock_gettime(CLOCK_REALTIME, &m->trans_time) >= 0);

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering ntpmsg.trans_time.sec = htobe32(m->trans_time.tv_sec + OFFSET_1900_1970);

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering ntpmsg.trans_time.frac = htobe32(m->trans_time.tv_nsec);

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering server_address_pretty(m->current_server_address, &pretty);

0dd25fb9f005d8ab7ac4bc10a609d00569f8c56aLennart Poettering

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering len = sendto(m->server_socket, &ntpmsg, sizeof(ntpmsg), MSG_DONTWAIT, &m->current_server_address->sockaddr.sa, m->current_server_address->socklen);

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering if (len == sizeof(ntpmsg)) {

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering m->pending = true;

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering log_debug("Sent NTP request to %s (%s).", strna(pretty), m->current_server_name->string);

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering } else {

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering log_debug("Sending NTP request to %s (%s) failed: %m", strna(pretty), m->current_server_name->string);

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering return manager_connect(m);

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering }

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering /* re-arm timer with increasing timeout, in case the packets never arrive back */

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering if (m->retry_interval > 0) {

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering if (m->retry_interval < NTP_POLL_INTERVAL_MAX_SEC * USEC_PER_SEC)

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering m->retry_interval *= 2;

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering } else

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering m->retry_interval = NTP_POLL_INTERVAL_MIN_SEC * USEC_PER_SEC;

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering r = manager_arm_timer(m, m->retry_interval);

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering if (r < 0) {

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering log_error("Failed to rearm timer: %s", strerror(-r));

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering return r;

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering }

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering m->missed_replies++;

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering if (m->missed_replies > NTP_MAX_MISSED_REPLIES) {

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering r = sd_event_add_time(

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering m->event,

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering &m->event_timeout,

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering clock_boottime_or_monotonic(),

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering now(clock_boottime_or_monotonic()) + TIMEOUT_USEC, 0,

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering manager_timeout, m);

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering if (r < 0) {

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering log_error("Failed to arm timeout timer: %s", strerror(-r));

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering return r;

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering }

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering }

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering return 0;

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering}

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poetteringstatic int manager_timer(sd_event_source *source, usec_t usec, void *userdata) {

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering Manager *m = userdata;

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering assert(m);

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering return manager_send_request(m);

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering}

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poetteringstatic int manager_arm_timer(Manager *m, usec_t next) {

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering int r;

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering assert(m);

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering assert(m->event_receive);

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering if (next == 0) {

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering m->event_timer = sd_event_source_unref(m->event_timer);

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering return 0;

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering }

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering if (m->event_timer) {

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering r = sd_event_source_set_time(m->event_timer, now(clock_boottime_or_monotonic()) + next);

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering if (r < 0)

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering return r;

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering return sd_event_source_set_enabled(m->event_timer, SD_EVENT_ONESHOT);

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering }

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering return sd_event_add_time(

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering m->event,

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering &m->event_timer,

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering clock_boottime_or_monotonic(),

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering now(clock_boottime_or_monotonic()) + next, 0,

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering manager_timer, m);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering}

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringstatic int manager_clock_watch(sd_event_source *source, int fd, uint32_t revents, void *userdata) {

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers Manager *m = userdata;

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers

89f7c8465cd1ab37347dd0c15920bce31e8225dfLennart Poettering assert(m);

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering /* rearm timer */

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering manager_clock_watch_setup(m);

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering /* skip our own jumps */

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (m->jumped) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering m->jumped = false;

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen return 0;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering /* resync */

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering log_info("System time changed. Resyncing.");

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering m->poll_resync = true;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return manager_send_request(m);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering}

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringstatic int manager_clock_watch_setup(Manager *m) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering struct itimerspec its = {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering .it_value.tv_sec = TIME_T_MAX

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering };

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering int r;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering assert(m);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering m->event_clock_watch = sd_event_source_unref(m->event_clock_watch);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering safe_close(m->clock_watch_fd);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering m->clock_watch_fd = timerfd_create(CLOCK_REALTIME, TFD_NONBLOCK|TFD_CLOEXEC);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (m->clock_watch_fd < 0) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering log_error("Failed to create timerfd: %m");

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return -errno;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (timerfd_settime(m->clock_watch_fd, TFD_TIMER_ABSTIME|TFD_TIMER_CANCEL_ON_SET, &its, NULL) < 0) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering log_error("Failed to set up timerfd: %m");

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return -errno;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering r = sd_event_add_io(m->event, &m->event_clock_watch, m->clock_watch_fd, EPOLLIN, manager_clock_watch, m);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (r < 0) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering log_error("Failed to create clock watch event source: %s", strerror(-r));

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return r;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return 0;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering}

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringstatic int manager_adjust_clock(Manager *m, double offset, int leap_sec) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering struct timex tmx = {};

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering int r;

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering assert(m);

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering /*

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering if (fabs(offset) < NTP_MAX_ADJUST) {

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering tmx.modes = ADJ_STATUS | ADJ_NANO | ADJ_OFFSET | ADJ_TIMECONST | ADJ_MAXERROR | ADJ_ESTERROR;

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering tmx.status = STA_PLL;

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering tmx.offset = offset * NSEC_PER_SEC;

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering tmx.constant = log2i(m->poll_interval_usec / USEC_PER_SEC) - 4;

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering tmx.maxerror = 0;

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering tmx.esterror = 0;

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering log_debug(" adjust (slew): %+.3f sec\n", offset);

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering } else {

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering tmx.modes = ADJ_STATUS | ADJ_NANO | ADJ_SETOFFSET;

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering /* ADJ_NANO uses nanoseconds in the microseconds field */

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering tmx.time.tv_sec = (long)offset;

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering tmx.time.tv_usec = (offset - tmx.time.tv_sec) * NSEC_PER_SEC;

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering /* the kernel expects -0.3s as {-1, 7000.000.000} */

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering if (tmx.time.tv_usec < 0) {

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering tmx.time.tv_sec -= 1;

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering tmx.time.tv_usec += NSEC_PER_SEC;

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering }

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering

717603e391b52983ca1fd218e7333a1b9dfc5c05Lennart Poettering m->jumped = true;

89f7c8465cd1ab37347dd0c15920bce31e8225dfLennart Poettering log_debug(" adjust (jump): %+.3f sec\n", offset);

89f7c8465cd1ab37347dd0c15920bce31e8225dfLennart Poettering }

89f7c8465cd1ab37347dd0c15920bce31e8225dfLennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering /*

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering if (m->rtc_local_time)

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering tmx.status |= STA_UNSYNC;

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering switch (leap_sec) {

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering case 1:

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering tmx.status |= STA_INS;

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering break;

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering case -1:

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering tmx.status |= STA_DEL;

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering break;

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering }

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering r = clock_adjtime(CLOCK_REALTIME, &tmx);

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering if (r < 0)

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers return r;

a6c616024db23fef34152c1432892824a07799ccLennart Poettering

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers touch("/var/lib/systemd/clock");

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering m->drift_ppm = tmx.freq / 65536;

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering log_debug(" status : %04i %s\n"

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering " time now : %li.%03llu\n"

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering " constant : %li\n"

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering " offset : %+.3f sec\n"

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering " freq offset : %+li (%i ppm)\n",

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering tmx.status, tmx.status & STA_UNSYNC ? "unsync" : "sync",

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers tmx.time.tv_sec, (unsigned long long) (tmx.time.tv_usec / NSEC_PER_MSEC),

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers tmx.constant,

a6c616024db23fef34152c1432892824a07799ccLennart Poettering (double)tmx.offset / NSEC_PER_SEC,

a6c616024db23fef34152c1432892824a07799ccLennart Poettering tmx.freq, m->drift_ppm);

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen return 0;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering}

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringstatic bool manager_sample_spike_detection(Manager *m, double offset, double delay) {

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers unsigned int i, idx_cur, idx_new, idx_min;

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers double jitter;

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers double j;

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers assert(m);

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers m->packet_count++;

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering /* ignore initial sample */

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (m->packet_count == 1)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return false;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering /* store the current data in our samples array */

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering idx_cur = m->samples_idx;

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers idx_new = (idx_cur + 1) % ELEMENTSOF(m->samples);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering m->samples_idx = idx_new;

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers m->samples[idx_new].offset = offset;

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers m->samples[idx_new].delay = delay;

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers

89f7c8465cd1ab37347dd0c15920bce31e8225dfLennart Poettering /* calculate new jitter value from the RMS differences relative to the lowest delay sample */

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers jitter = m->samples_jitter;

f48e75cb9a8112d35855c44a156934f2ee0edb2eLennart Poettering for (idx_min = idx_cur, i = 0; i < ELEMENTSOF(m->samples); i++)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (m->samples[i].delay > 0 && m->samples[i].delay < m->samples[idx_min].delay)

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers idx_min = i;

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering j = 0;

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers for (i = 0; i < ELEMENTSOF(m->samples); i++)

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers j += square(m->samples[i].offset - m->samples[idx_min].offset);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering m->samples_jitter = sqrt(j / (ELEMENTSOF(m->samples) - 1));

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers /* ignore samples when resyncing */

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (m->poll_resync)

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers return false;

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen

27e72d6b22890ba4a8cbc05c49667cd1cccf1461Simon Peeters /* always accept offset if we are farther off than the round-trip delay */

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen if (fabs(offset) > delay)

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers return false;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

a7893c6b28772edbc7e1fea3c209caa54d465648Lennart Poettering /* we need a few samples before looking at them */

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (m->packet_count < 4)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return false;

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen /* do not accept anything worse than the maximum possible error of the best sample */

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen if (fabs(offset) > m->samples[idx_min].delay)

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers return true;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers /* compare the difference between the current offset to the previous offset and jitter */

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return fabs(offset - m->samples[idx_cur].offset) > 3 * jitter;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering}

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringstatic void manager_adjust_poll(Manager *m, double offset, bool spike) {

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers assert(m);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (m->poll_resync) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering m->poll_interval_usec = NTP_POLL_INTERVAL_MIN_SEC * USEC_PER_SEC;

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers m->poll_resync = false;

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen return;

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers /* set to minimal poll interval */

8c841f21f5042b11acc91cc1b039cb162cbbe8f4Djalal Harouni if (!spike && fabs(offset) > NTP_ACCURACY_SEC) {

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers m->poll_interval_usec = NTP_POLL_INTERVAL_MIN_SEC * USEC_PER_SEC;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering /* increase polling interval */

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (fabs(offset) < NTP_ACCURACY_SEC * 0.25) {

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen if (m->poll_interval_usec < NTP_POLL_INTERVAL_MAX_SEC * USEC_PER_SEC)

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen m->poll_interval_usec *= 2;

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen return;

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen }

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen /* decrease polling interval */

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen if (spike || fabs(offset) > NTP_ACCURACY_SEC * 0.75) {

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen if (m->poll_interval_usec > NTP_POLL_INTERVAL_MIN_SEC * USEC_PER_SEC)

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen m->poll_interval_usec /= 2;

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen return;

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen }

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen}

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersenstatic int manager_receive_response(sd_event_source *source, int fd, uint32_t revents, void *userdata) {

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen Manager *m = userdata;

5b30bef856e89a571df57b7b953e9a1409d9acedLennart Poettering struct ntp_msg ntpmsg;

5b30bef856e89a571df57b7b953e9a1409d9acedLennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering struct iovec iov = {

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers .iov_base = &ntpmsg,

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers .iov_len = sizeof(ntpmsg),

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers };

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers union {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering struct cmsghdr cmsghdr;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering uint8_t buf[CMSG_SPACE(sizeof(struct timeval))];

9f6eb1cd58f2ddf2eb6ba0e4de056e13d938af75Kay Sievers } control;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering union sockaddr_union server_addr;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering struct msghdr msghdr = {

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen .msg_iov = &iov,

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen .msg_iovlen = 1,

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering .msg_control = &control,

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering .msg_controllen = sizeof(control),

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering .msg_name = &server_addr,

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering .msg_namelen = sizeof(server_addr),

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering };

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering struct cmsghdr *cmsg;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering struct timespec *recv_time;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering ssize_t len;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering double origin, receive, trans, dest;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering double delay, offset;

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen double root_distance;

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen bool spike;

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen int leap_sec;

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen int r;

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen assert(source);

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen assert(m);

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen if (revents & (EPOLLHUP|EPOLLERR)) {

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen log_warning("Server connection returned error.");

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen return manager_connect(m);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering len = recvmsg(fd, &msghdr, MSG_DONTWAIT);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (len < 0) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (errno == EAGAIN)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return 0;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1dba654b27918c22e413ac5b3c19301f1ff86ad2Lennart Poettering log_warning("Error receiving message. Disconnecting.");

1dba654b27918c22e413ac5b3c19301f1ff86ad2Lennart Poettering return manager_connect(m);

1dba654b27918c22e413ac5b3c19301f1ff86ad2Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1dba654b27918c22e413ac5b3c19301f1ff86ad2Lennart Poettering if (iov.iov_len < sizeof(struct ntp_msg)) {

1dba654b27918c22e413ac5b3c19301f1ff86ad2Lennart Poettering log_warning("Invalid response from server. Disconnecting.");

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return manager_connect(m);

1dba654b27918c22e413ac5b3c19301f1ff86ad2Lennart Poettering }

1dba654b27918c22e413ac5b3c19301f1ff86ad2Lennart Poettering

1dba654b27918c22e413ac5b3c19301f1ff86ad2Lennart Poettering if (!m->current_server_name ||

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering !m->current_server_address ||

1dba654b27918c22e413ac5b3c19301f1ff86ad2Lennart Poettering !sockaddr_equal(&server_addr, &m->current_server_address->sockaddr)) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering log_debug("Response from unknown server.");

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return 0;

1dba654b27918c22e413ac5b3c19301f1ff86ad2Lennart Poettering }

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering recv_time = NULL;

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering for (cmsg = CMSG_FIRSTHDR(&msghdr); cmsg; cmsg = CMSG_NXTHDR(&msghdr, cmsg)) {

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering if (cmsg->cmsg_level != SOL_SOCKET)

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering continue;

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering

1dba654b27918c22e413ac5b3c19301f1ff86ad2Lennart Poettering switch (cmsg->cmsg_type) {

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering case SCM_TIMESTAMPNS:

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering recv_time = (struct timespec *) CMSG_DATA(cmsg);

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering break;

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering }

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering }

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering if (!recv_time) {

1dba654b27918c22e413ac5b3c19301f1ff86ad2Lennart Poettering log_error("Invalid packet timestamp.");

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering return -EINVAL;

1dba654b27918c22e413ac5b3c19301f1ff86ad2Lennart Poettering }

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering if (!m->pending) {

1dba654b27918c22e413ac5b3c19301f1ff86ad2Lennart Poettering log_debug("Unexpected reply. Ignoring.");

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering return 0;

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering }

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering m->missed_replies = 0;

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering /* check our "time cookie" (we just stored nanoseconds in the fraction field) */

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering if (be32toh(ntpmsg.origin_time.sec) != m->trans_time.tv_sec + OFFSET_1900_1970 ||

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering be32toh(ntpmsg.origin_time.frac) != m->trans_time.tv_nsec) {

3d94f76c99da13e5603831d0b278f8c8c21bcb02Lennart Poettering log_debug("Invalid reply; not our transmit time. Ignoring.");

a4475f577bd0daf762d6c3b4e58bc484e0cb74afLennart Poettering return 0;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering }

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering m->event_timeout = sd_event_source_unref(m->event_timeout);

34a6778fb9d1065f3fbb8e2243b9f0f25d1d18f1Zbigniew Jędrzejewski-Szmek

34a6778fb9d1065f3fbb8e2243b9f0f25d1d18f1Zbigniew Jędrzejewski-Szmek if (be32toh(ntpmsg.recv_time.sec) < TIME_EPOCH + OFFSET_1900_1970 ||

34a6778fb9d1065f3fbb8e2243b9f0f25d1d18f1Zbigniew Jędrzejewski-Szmek be32toh(ntpmsg.trans_time.sec) < TIME_EPOCH + OFFSET_1900_1970) {

34a6778fb9d1065f3fbb8e2243b9f0f25d1d18f1Zbigniew Jędrzejewski-Szmek log_debug("Invalid reply, returned times before epoch. Ignoring.");

34a6778fb9d1065f3fbb8e2243b9f0f25d1d18f1Zbigniew Jędrzejewski-Szmek return manager_connect(m);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering }

f69157a66ffe413b4cf8bd79057487fc8921e78bThomas Hindoe Paaboel Andersen

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering if (NTP_FIELD_LEAP(ntpmsg.field) == NTP_LEAP_NOTINSYNC ||

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering ntpmsg.stratum == 0 || ntpmsg.stratum >= 16) {

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering log_debug("Server is not synchronized. Disconnecting.");

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering return manager_connect(m);

bc9fd78c7bfc39881e19457e476393635f8b0442Lennart Poettering }

bc9fd78c7bfc39881e19457e476393635f8b0442Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering if (!IN_SET(NTP_FIELD_VERSION(ntpmsg.field), 3, 4)) {

bc9fd78c7bfc39881e19457e476393635f8b0442Lennart Poettering log_debug("Response NTPv%d. Disconnecting.", NTP_FIELD_VERSION(ntpmsg.field));

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering return manager_connect(m);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering }

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering if (NTP_FIELD_MODE(ntpmsg.field) != NTP_MODE_SERVER) {

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering log_debug("Unsupported mode %d. Disconnecting.", NTP_FIELD_MODE(ntpmsg.field));

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering return manager_connect(m);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering }

03e334a1c7dc8c20c38902aa039440763acc9b17Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering root_distance = ntp_ts_short_to_d(&ntpmsg.root_delay) / 2 + ntp_ts_short_to_d(&ntpmsg.root_dispersion);

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering if (root_distance > NTP_MAX_ROOT_DISTANCE) {

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering log_debug("Server has too large root distance. Disconnecting.");

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering return manager_connect(m);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering }

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering /* valid packet */

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering m->pending = false;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering m->retry_interval = 0;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering /* announce leap seconds */

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering if (NTP_FIELD_LEAP(ntpmsg.field) & NTP_LEAP_PLUSSEC)

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering leap_sec = 1;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering else if (NTP_FIELD_LEAP(ntpmsg.field) & NTP_LEAP_MINUSSEC)

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering leap_sec = -1;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering else

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering leap_sec = 0;

bc9fd78c7bfc39881e19457e476393635f8b0442Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering /*

878cd7e95ca303f9851d227a22d2022bd49944b0Lennart Poettering origin = ts_to_d(&m->trans_time) + OFFSET_1900_1970;

fbadf04511389c4a0687ba5e9baf0ecebdbb07f1Lennart Poettering receive = ntp_ts_to_d(&ntpmsg.recv_time);

bc9fd78c7bfc39881e19457e476393635f8b0442Lennart Poettering trans = ntp_ts_to_d(&ntpmsg.trans_time);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering dest = ts_to_d(recv_time) + OFFSET_1900_1970;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering offset = ((receive - origin) + (trans - dest)) / 2;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering delay = (dest - origin) - (trans - receive);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering spike = manager_sample_spike_detection(m, offset, delay);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering manager_adjust_poll(m, offset, spike);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering log_debug("NTP response:\n"

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering " leap : %u\n"

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering " version : %u\n"

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering " mode : %u\n"

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering " stratum : %u\n"

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering " precision : %.6f sec (%d)\n"

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering " root distance: %.6f sec\n"

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering " reference : %.4s\n"

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering " origin : %.3f\n"

6261f11fc3d0a8b63c5afa5313d96607a008b54eLennart Poettering " receive : %.3f\n"

6261f11fc3d0a8b63c5afa5313d96607a008b54eLennart Poettering " transmit : %.3f\n"

6261f11fc3d0a8b63c5afa5313d96607a008b54eLennart Poettering " dest : %.3f\n"

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering " offset : %+.3f sec\n"

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering " delay : %+.3f sec\n"

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering " packet count : %"PRIu64"\n"

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering " jitter : %.3f%s\n"

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering " poll interval: " USEC_FMT "\n",

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering NTP_FIELD_LEAP(ntpmsg.field),

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering NTP_FIELD_VERSION(ntpmsg.field),

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering NTP_FIELD_MODE(ntpmsg.field),

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering ntpmsg.stratum,

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering exp2(ntpmsg.precision), ntpmsg.precision,

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering root_distance,

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering ntpmsg.stratum == 1 ? ntpmsg.refid : "n/a",

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering origin - OFFSET_1900_1970,

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering receive - OFFSET_1900_1970,

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering trans - OFFSET_1900_1970,

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering dest - OFFSET_1900_1970,

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering offset, delay,

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering m->packet_count,

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering m->samples_jitter, spike ? " spike" : "",

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering m->poll_interval_usec / USEC_PER_SEC);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering if (!spike) {

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering m->sync = true;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering r = manager_adjust_clock(m, offset, leap_sec);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering if (r < 0)

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering log_error("Failed to call clock_adjtime(): %m");

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering }

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering log_info("interval/delta/delay/jitter/drift " USEC_FMT "s/%+.3fs/%.3fs/%.3fs/%+ippm%s",

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering m->poll_interval_usec / USEC_PER_SEC, offset, delay, m->samples_jitter, m->drift_ppm,

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering spike ? " (ignored)" : "");

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering r = manager_arm_timer(m, m->poll_interval_usec);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering if (r < 0) {

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering log_error("Failed to rearm timer: %s", strerror(-r));

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering return r;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering }

5b30bef856e89a571df57b7b953e9a1409d9acedLennart Poettering

5b30bef856e89a571df57b7b953e9a1409d9acedLennart Poettering return 0;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering}

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poetteringstatic int manager_listen_setup(Manager *m) {

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering union sockaddr_union addr = {};

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering static const int tos = IPTOS_LOWDELAY;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering static const int on = 1;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering int r;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering assert(m);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering assert(m->server_socket < 0);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering assert(!m->event_receive);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering assert(m->current_server_address);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering addr.sa.sa_family = m->current_server_address->sockaddr.sa.sa_family;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

5b30bef856e89a571df57b7b953e9a1409d9acedLennart Poettering m->server_socket = socket(addr.sa.sa_family, SOCK_DGRAM | SOCK_CLOEXEC, 0);

5b30bef856e89a571df57b7b953e9a1409d9acedLennart Poettering if (m->server_socket < 0)

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering return -errno;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering r = bind(m->server_socket, &addr.sa, m->current_server_address->socklen);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering if (r < 0)

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering return -errno;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering r = setsockopt(m->server_socket, SOL_SOCKET, SO_TIMESTAMPNS, &on, sizeof(on));

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering if (r < 0)

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering return -errno;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering (void) setsockopt(m->server_socket, IPPROTO_IP, IP_TOS, &tos, sizeof(tos));

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering return sd_event_add_io(m->event, &m->event_receive, m->server_socket, EPOLLIN, manager_receive_response, m);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering}

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poetteringstatic int manager_begin(Manager *m) {

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering _cleanup_free_ char *pretty = NULL;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering int r;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

3db729cb8e6822114e9323f4041dcdc080f2fb3cJason A. Donenfeld assert(m);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering assert_return(m->current_server_name, -EHOSTUNREACH);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering assert_return(m->current_server_address, -EHOSTUNREACH);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering m->missed_replies = NTP_MAX_MISSED_REPLIES;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering if (m->poll_interval_usec == 0)

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering m->poll_interval_usec = NTP_POLL_INTERVAL_MIN_SEC * USEC_PER_SEC;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering server_address_pretty(m->current_server_address, &pretty);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering log_info("Using NTP server %s (%s).", strna(pretty), m->current_server_name->string);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering sd_notifyf(false, "STATUS=Using Time Server %s (%s).", strna(pretty), m->current_server_name->string);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering r = manager_listen_setup(m);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering if (r < 0) {

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering log_warning("Failed to setup connection socket: %s", strerror(-r));

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering return r;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering }

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering r = manager_clock_watch_setup(m);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering if (r < 0)

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering return r;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering return manager_send_request(m);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering}

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poetteringvoid manager_set_server_name(Manager *m, ServerName *n) {

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering assert(m);

a6c616024db23fef34152c1432892824a07799ccLennart Poettering

a6c616024db23fef34152c1432892824a07799ccLennart Poettering if (m->current_server_name == n)

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering return;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering m->current_server_name = n;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering m->current_server_address = NULL;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering manager_disconnect(m);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering if (n)

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering log_debug("Selected server %s.", n->string);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering}

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poetteringvoid manager_set_server_address(Manager *m, ServerAddress *a) {

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering assert(m);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering if (m->current_server_address == a)

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering return;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering m->current_server_address = a;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering /* If a is NULL, we are just clearing the address, without

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (a)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering m->current_server_name = a->name;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering manager_disconnect(m);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

a7893c6b28772edbc7e1fea3c209caa54d465648Lennart Poettering if (a) {

e56056e93d33619a3acf13e483900b4f8938228fThomas Hindoe Paaboel Andersen _cleanup_free_ char *pretty = NULL;

53755121e1c8ebd3db0330bc82965ecf9a986449Lennart Poettering server_address_pretty(a, &pretty);

53755121e1c8ebd3db0330bc82965ecf9a986449Lennart Poettering log_debug("Selected address %s of server %s.", strna(pretty), a->name->string);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering}

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

a7893c6b28772edbc7e1fea3c209caa54d465648Lennart Poetteringstatic int manager_resolve_handler(sd_resolve_query *q, int ret, const struct addrinfo *ai, void *userdata) {

a7893c6b28772edbc7e1fea3c209caa54d465648Lennart Poettering Manager *m = userdata;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering int r;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

4f8f66cb4236783cd3cbee97fefc9aaa8469ac08Zbigniew Jędrzejewski-Szmek assert(q);

4f8f66cb4236783cd3cbee97fefc9aaa8469ac08Zbigniew Jędrzejewski-Szmek assert(m);

1dba654b27918c22e413ac5b3c19301f1ff86ad2Lennart Poettering assert(m->current_server_name);

1dba654b27918c22e413ac5b3c19301f1ff86ad2Lennart Poettering

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering m->resolve_query = sd_resolve_query_unref(m->resolve_query);

1dba654b27918c22e413ac5b3c19301f1ff86ad2Lennart Poettering

1dba654b27918c22e413ac5b3c19301f1ff86ad2Lennart Poettering if (ret != 0) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering log_debug("Failed to resolve %s: %s", m->current_server_name->string, gai_strerror(ret));

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering /* Try next host */

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return manager_connect(m);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering for (; ai; ai = ai->ai_next) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering _cleanup_free_ char *pretty = NULL;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering ServerAddress *a;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

e56056e93d33619a3acf13e483900b4f8938228fThomas Hindoe Paaboel Andersen assert(ai->ai_addr);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering assert(ai->ai_addrlen >= offsetof(struct sockaddr, sa_data));

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (!IN_SET(ai->ai_addr->sa_family, AF_INET, AF_INET6)) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering log_warning("Unsuitable address protocol for %s", m->current_server_name->string);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering continue;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering r = server_address_new(m->current_server_name, &a, (const union sockaddr_union*) ai->ai_addr, ai->ai_addrlen);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (r < 0) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering log_error("Failed to add server address: %s", strerror(-r));

e56056e93d33619a3acf13e483900b4f8938228fThomas Hindoe Paaboel Andersen return r;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering server_address_pretty(a, &pretty);

a7893c6b28772edbc7e1fea3c209caa54d465648Lennart Poettering log_debug("Resolved address %s for %s.", pretty, m->current_server_name->string);

eb9da376d76b48585b3b63b4f91903b54f7abd36Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (!m->current_server_name->addresses) {

a7893c6b28772edbc7e1fea3c209caa54d465648Lennart Poettering log_error("Failed to find suitable address for host %s.", m->current_server_name->string);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering /* Try next host */

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return manager_connect(m);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

a7893c6b28772edbc7e1fea3c209caa54d465648Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering manager_set_server_address(m, m->current_server_name->addresses);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return manager_begin(m);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering}

eb9da376d76b48585b3b63b4f91903b54f7abd36Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringstatic int manager_retry_connect(sd_event_source *source, usec_t usec, void *userdata) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering Manager *m = userdata;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering assert(m);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return manager_connect(m);

a7893c6b28772edbc7e1fea3c209caa54d465648Lennart Poettering}

a7893c6b28772edbc7e1fea3c209caa54d465648Lennart Poettering

a7893c6b28772edbc7e1fea3c209caa54d465648Lennart Poetteringint manager_connect(Manager *m) {

a7893c6b28772edbc7e1fea3c209caa54d465648Lennart Poettering int r;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering assert(m);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering manager_disconnect(m);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering m->event_retry = sd_event_source_unref(m->event_retry);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (!ratelimit_test(&m->ratelimit)) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering log_debug("Slowing down attempts to contact servers.");

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering 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);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (r < 0) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering log_error("Failed to create retry timer: %s", strerror(-r));

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return r;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return 0;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering /* If we already are operating on some address, switch to the

e56056e93d33619a3acf13e483900b4f8938228fThomas Hindoe Paaboel Andersen if (m->current_server_address && m->current_server_address->addresses_next)

e56056e93d33619a3acf13e483900b4f8938228fThomas Hindoe Paaboel Andersen manager_set_server_address(m, m->current_server_address->addresses_next);

e56056e93d33619a3acf13e483900b4f8938228fThomas Hindoe Paaboel Andersen else {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering struct addrinfo hints = {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering .ai_flags = AI_NUMERICSERV|AI_ADDRCONFIG,

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering .ai_socktype = SOCK_DGRAM,

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering };

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering /* Hmm, we are through all addresses, let's look for the next host instead */

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (m->current_server_name && m->current_server_name->names_next)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering manager_set_server_name(m, m->current_server_name->names_next);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering else {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering ServerName *f;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering bool restart = true;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering /* Our current server name list is exhausted,

a7893c6b28772edbc7e1fea3c209caa54d465648Lennart Poettering if (!m->current_server_name || m->current_server_name->type == SERVER_LINK) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering f = m->system_servers;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (!f)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering f = m->link_servers;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering } else {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering f = m->link_servers;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (!f)

eb9da376d76b48585b3b63b4f91903b54f7abd36Lennart Poettering f = m->system_servers;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering else

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering restart = false;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (!f)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering f = m->fallback_servers;

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (!f) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering manager_set_server_name(m, NULL);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering log_debug("No server found.");

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return 0;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (restart && !m->exhausted_servers && m->poll_interval_usec) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering log_debug("Waiting after exhausting servers.");

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering 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);

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen if (r < 0) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering log_error("Failed to create retry timer: %s", strerror(-r));

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return r;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering m->exhausted_servers = true;

923d8fd381bced1c2d90ca53d18629d61a0f454aLennart Poettering

1dba654b27918c22e413ac5b3c19301f1ff86ad2Lennart Poettering /* Increase the polling interval */

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (m->poll_interval_usec < NTP_POLL_INTERVAL_MAX_SEC * USEC_PER_SEC)

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering m->poll_interval_usec *= 2;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return 0;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering m->exhausted_servers = false;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering manager_set_server_name(m, f);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering /* Tell the resolver to reread /etc/resolv.conf, in

46e65dcc3a522b5e992e165b5e61d14254026859Lennart Poettering res_init();

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering /* Flush out any previously resolved addresses */

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering server_name_flush_addresses(m->current_server_name);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering log_debug("Resolving %s...", m->current_server_name->string);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering r = sd_resolve_getaddrinfo(m->resolve, &m->resolve_query, m->current_server_name->string, "123", &hints, manager_resolve_handler, m);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (r < 0) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering log_error("Failed to create resolver: %s", strerror(-r));

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return r;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return 1;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering r = manager_begin(m);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (r < 0)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return r;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return 1;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering}

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringvoid manager_disconnect(Manager *m) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering assert(m);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering m->resolve_query = sd_resolve_query_unref(m->resolve_query);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering m->event_timer = sd_event_source_unref(m->event_timer);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering m->event_receive = sd_event_source_unref(m->event_receive);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering m->server_socket = safe_close(m->server_socket);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering m->event_clock_watch = sd_event_source_unref(m->event_clock_watch);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering m->clock_watch_fd = safe_close(m->clock_watch_fd);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering m->event_timeout = sd_event_source_unref(m->event_timeout);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering sd_notifyf(false, "STATUS=Idle.");

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering}

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringvoid manager_flush_server_names(Manager *m, ServerType t) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering assert(m);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (t == SERVER_SYSTEM)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering while (m->system_servers)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering server_name_free(m->system_servers);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (t == SERVER_LINK)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering while (m->link_servers)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering server_name_free(m->link_servers);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen if (t == SERVER_FALLBACK)

84f6181c2ac99a0514ca5e0c8fc8c8e284caf789Lennart Poettering while (m->fallback_servers)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering server_name_free(m->fallback_servers);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering}

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringvoid manager_free(Manager *m) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (!m)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return;

84f6181c2ac99a0514ca5e0c8fc8c8e284caf789Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering manager_disconnect(m);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering manager_flush_server_names(m, SERVER_SYSTEM);

d21ed1ead18d16d35c30299a69d3366847f8a039Lennart Poettering manager_flush_server_names(m, SERVER_LINK);

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen manager_flush_server_names(m, SERVER_FALLBACK);

d21ed1ead18d16d35c30299a69d3366847f8a039Lennart Poettering

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen sd_event_source_unref(m->event_retry);

a1da85830bfaa77b9eb9c54693e5573559c97e50Tom Gundersen

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering sd_event_source_unref(m->network_event_source);

04d39279245834494baccfdb9349db8bf80abd13Lennart Poettering sd_network_monitor_unref(m->network_monitor);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering sd_resolve_unref(m->resolve);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering sd_event_unref(m->event);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

84f6181c2ac99a0514ca5e0c8fc8c8e284caf789Lennart Poettering free(m);

84f6181c2ac99a0514ca5e0c8fc8c8e284caf789Lennart Poettering}

84f6181c2ac99a0514ca5e0c8fc8c8e284caf789Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringstatic int manager_network_read_link_servers(Manager *m) {

_cleanup_strv_free_ char **ntp = NULL;

ServerName *n, *nx;

char **i;

int r;

assert(m);

r = sd_network_get_ntp(&ntp);

if (r < 0)

goto clear;

LIST_FOREACH(names, n, m->link_servers)

n->marked = true;

STRV_FOREACH(i, ntp) {

bool found = false;

LIST_FOREACH(names, n, m->link_servers)

if (streq(n->string, *i)) {

n->marked = false;

found = true;

break;

}

if (!found) {

r = server_name_new(m, NULL, SERVER_LINK, *i);

if (r < 0)

goto clear;

}

}

LIST_FOREACH_SAFE(names, n, nx, m->link_servers)

if (n->marked)

server_name_free(n);

return 0;

clear:

manager_flush_server_names(m, SERVER_LINK);

return r;

}

static int manager_network_event_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {

Manager *m = userdata;

bool connected, online;

int r;

assert(m);

sd_network_monitor_flush(m->network_monitor);

manager_network_read_link_servers(m);

/* check if the machine is online */

online = network_is_online();

/* check if the client is currently connected */

connected = m->server_socket >= 0 || m->resolve_query || m->exhausted_servers;

if (connected && !online) {

log_info("No network connectivity, watching for changes.");

manager_disconnect(m);

} else if (!connected && online) {

log_info("Network configuration changed, trying to establish connection.");

if (m->current_server_address)

r = manager_begin(m);

else

r = manager_connect(m);

if (r < 0)

return r;

}

return 0;

}

static int manager_network_monitor_listen(Manager *m) {

int r, fd, events;

assert(m);

r = sd_network_monitor_new(&m->network_monitor, NULL);

if (r < 0)

return r;

fd = sd_network_monitor_get_fd(m->network_monitor);

if (fd < 0)

return fd;

events = sd_network_monitor_get_events(m->network_monitor);

if (events < 0)

return events;

r = sd_event_add_io(m->event, &m->network_event_source, fd, events, manager_network_event_handler, m);

if (r < 0)

return r;

return 0;

}

int manager_new(Manager **ret) {

_cleanup_(manager_freep) Manager *m = NULL;

int r;

assert(ret);

m = new0(Manager, 1);

if (!m)

return -ENOMEM;

m->server_socket = m->clock_watch_fd = -1;

RATELIMIT_INIT(m->ratelimit, RATELIMIT_INTERVAL_USEC, RATELIMIT_BURST);

r = manager_parse_server_string(m, SERVER_FALLBACK, NTP_SERVERS);

if (r < 0)

return r;

r = sd_event_default(&m->event);

if (r < 0)

return r;

sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);

sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);

sd_event_set_watchdog(m->event, true);

r = sd_resolve_default(&m->resolve);

if (r < 0)

return r;

r = sd_resolve_attach_event(m->resolve, m->event, 0);

if (r < 0)

return r;

r = manager_network_monitor_listen(m);

if (r < 0)

return r;

manager_network_read_link_servers(m);

*ret = m;

m = NULL;

return 0;

}