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leapdb: move source check into separate function

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The sanity checks are valid for all possible sources of leap second
information, so move them into a separate function check_leap_source().
This commit is contained in:
Patrick Oppenlander 2024-02-08 14:36:27 +11:00 committed by Miroslav Lichvar
parent 02ae9a8607
commit 83f90279b0
1 changed files with 21 additions and 11 deletions
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28
leapdb.c
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@ -93,22 +93,32 @@ get_tz_leap(time_t when, int *tai_offset)
/* ================================================== */
static int
check_leap_source(NTP_Leap (*src)(time_t when, int *tai_offset))
{
int tai_offset = 0;
/* Check that the leap second source has good data for Jun 30 2012 and Dec 31 2012 */
if (src(1341014400, &tai_offset) == LEAP_InsertSecond && tai_offset == 34 &&
src(1356912000, &tai_offset) == LEAP_Normal && tai_offset == 35)
return 1;
return 0;
}
/* ================================================== */
void
LDB_Initialise(void)
{
int tai_offset;
leap_tzname = CNF_GetLeapSecTimezone();
if (leap_tzname) {
/* Check that the timezone has good data for Jun 30 2012 and Dec 31 2012 */
if (get_tz_leap(1341014400, &tai_offset) == LEAP_InsertSecond && tai_offset == 34 &&
get_tz_leap(1356912000, &tai_offset) == LEAP_Normal && tai_offset == 35) {
LOG(LOGS_INFO, "Using %s timezone to obtain leap second data", leap_tzname);
} else {
if (leap_tzname && !check_leap_source(get_tz_leap)) {
LOG(LOGS_WARN, "Timezone %s failed leap second check, ignoring", leap_tzname);
leap_tzname = NULL;
}
}
if (leap_tzname)
LOG(LOGS_INFO, "Using %s timezone to obtain leap second data", leap_tzname);
}
/* ================================================== */