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timesyncd: never accept NTP time from server that is older than systemd's release time
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@ -836,6 +836,14 @@ AC_ARG_WITH(ntp-servers,
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AC_DEFINE_UNQUOTED(NTP_SERVERS, ["$NTP_SERVERS"], [Default NTP Servers])
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AC_SUBST(NTP_SERVERS)
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AC_ARG_WITH(time-epoch,
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AS_HELP_STRING([--with-time-epoch=SECONDS],
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[TIme epoch for time clients]),
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[TIME_EPOCH="$withval"],
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[TIME_EPOCH="`stat -c %Y ${srcdir}/NEWS 2>/dev/null || echo 0`"])
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AC_DEFINE_UNQUOTED(TIME_EPOCH, [$TIME_EPOCH], [Time Epoch])
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# ------------------------------------------------------------------------------
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have_localed=no
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AC_ARG_ENABLE(localed, AS_HELP_STRING([--disable-localed], [disable locale daemon]))
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@ -1169,6 +1177,7 @@ AC_MSG_RESULT([
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timedated: ${have_timedated}
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timesyncd: ${have_timesyncd}
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default NTP servers: ${NTP_SERVERS}
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time epoch: ${TIME_EPOCH}
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localed: ${have_localed}
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networkd: ${have_networkd}
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coredump: ${have_coredump}
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@ -573,12 +573,18 @@ static int manager_receive_response(sd_event_source *source, int fd, uint32_t re
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m->event_timeout = sd_event_source_unref(m->event_timeout);
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if (be32toh(ntpmsg.recv_time.sec) < TIME_EPOCH + OFFSET_1900_1970 ||
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be32toh(ntpmsg.trans_time.sec) < TIME_EPOCH + OFFSET_1900_1970) {
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log_debug("Invalid reply, returned times before epoch. Ignoring.");
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return manager_connect(m);
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}
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if (NTP_FIELD_LEAP(ntpmsg.field) == NTP_LEAP_NOTINSYNC) {
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log_debug("Server is not synchronized. Disconnecting.");
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return manager_connect(m);
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}
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if (NTP_FIELD_VERSION(ntpmsg.field) != 4 && NTP_FIELD_VERSION(ntpmsg.field) != 3) {
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if (!IN_SET(NTP_FIELD_VERSION(ntpmsg.field), 3, 4)) {
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log_debug("Response NTPv%d. Disconnecting.", NTP_FIELD_VERSION(ntpmsg.field));
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return manager_connect(m);
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}
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