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AP_RTC: Don't allow RTC times before 2019

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Michael du Breuil 2019-09-06 16:31:29 -07:00 committed by Andrew Tridgell
parent ba3f95ad20
commit ba3cfbfb54
1 changed files with 7 additions and 0 deletions
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7
libraries/AP_RTC/AP_RTC.cpp
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@ -33,6 +33,8 @@ const AP_Param::GroupInfo AP_RTC::var_info[] = {
void AP_RTC::set_utc_usec(uint64_t time_utc_usec, source_type type) void AP_RTC::set_utc_usec(uint64_t time_utc_usec, source_type type)
{ {
const uint64_t oldest_acceptable_date = 1546300800000; // 2019-01-01 0:00
if (type >= rtc_source_type) { if (type >= rtc_source_type) {
// e.g. system-time message when we've been set by the GPS // e.g. system-time message when we've been set by the GPS
return; return;
@ -43,6 +45,11 @@ void AP_RTC::set_utc_usec(uint64_t time_utc_usec, source_type type)
return; return;
} }
// don't allow old times
if (time_utc_usec < oldest_acceptable_date) {
return;
}
const uint64_t now = AP_HAL::micros64(); const uint64_t now = AP_HAL::micros64();
const int64_t tmp = int64_t(time_utc_usec) - int64_t(now); const int64_t tmp = int64_t(time_utc_usec) - int64_t(now);
if (tmp < rtc_shift) { if (tmp < rtc_shift) {