src/timesync/timesyncd-manager.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 /***
   5   This file is part of systemd.
   6
   7   Copyright 2014 Kay Sievers, Lennart Poettering
   8 ***/
   9
  10 #include <sys/timex.h>
  11
  12 #include "sd-bus.h"
  13 #include "sd-event.h"
  14 #include "sd-network.h"
  15 #include "sd-resolve.h"
  16
  17 #include "list.h"
  18 #include "ratelimit.h"
  19 #include "time-util.h"
  20 #include "timesyncd-ntp-message.h"
  21
  22 typedef struct Manager Manager;
  23
  24 #include "timesyncd-server.h"
  25
  26 /*
  27  * "A client MUST NOT under any conditions use a poll interval less
  28  * than 15 seconds."
  29  */
  30 #define NTP_POLL_INTERVAL_MIN_USEC      (32 * USEC_PER_SEC)
  31 #define NTP_POLL_INTERVAL_MAX_USEC      (2048 * USEC_PER_SEC)
  32
  33 struct Manager {
  34         sd_bus *bus;
  35         sd_event *event;
  36         sd_resolve *resolve;
  37
  38         LIST_HEAD(ServerName, system_servers);
  39         LIST_HEAD(ServerName, link_servers);
  40         LIST_HEAD(ServerName, fallback_servers);
  41
  42         bool have_fallbacks:1;
  43
  44         RateLimit ratelimit;
  45         bool exhausted_servers;
  46
  47         /* network */
  48         sd_event_source *network_event_source;
  49         sd_network_monitor *network_monitor;
  50
  51         /* peer */
  52         sd_resolve_query *resolve_query;
  53         sd_event_source *event_receive;
  54         ServerName *current_server_name;
  55         ServerAddress *current_server_address;
  56         int server_socket;
  57         int missed_replies;
  58         uint64_t packet_count;
  59         sd_event_source *event_timeout;
  60         bool good;
  61
  62         /* last sent packet */
  63         struct timespec trans_time_mon;
  64         struct timespec trans_time;
  65         usec_t retry_interval;
  66         bool pending;
  67
  68         /* poll timer */
  69         sd_event_source *event_timer;
  70         usec_t poll_interval_usec;
  71         usec_t poll_interval_min_usec;
  72         usec_t poll_interval_max_usec;
  73         bool poll_resync;
  74
  75         /* history data */
  76         struct {
  77                 double offset;
  78                 double delay;
  79         } samples[8];
  80         unsigned int samples_idx;
  81         double samples_jitter;
  82         usec_t max_root_distance_usec;
  83
  84         /* last change */
  85         bool jumped;
  86         bool sync;
  87         long drift_freq;
  88
  89         /* watch for time changes */
  90         sd_event_source *event_clock_watch;
  91         int clock_watch_fd;
  92
  93         /* Retry connections */
  94         sd_event_source *event_retry;
  95
  96         /* RTC runs in local time, leave it alone */
  97         bool rtc_local_time;
  98
  99         /* NTP response */
 100         struct ntp_msg ntpmsg;
 101         struct timespec origin_time, dest_time;
 102         bool spike;
 103 };
 104
 105 int manager_new(Manager **ret);
 106 void manager_free(Manager *m);
 107
 108 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 109
 110 void manager_set_server_name(Manager *m, ServerName *n);
 111 void manager_set_server_address(Manager *m, ServerAddress *a);
 112 void manager_flush_server_names(Manager *m, ServerType t);
 113
 114 int manager_connect(Manager *m);
 115 void manager_disconnect(Manager *m);