feat: add NTP; fix networking bugs/regressions

kernel/src/Timekeeping/Time.cpp

@@ -84,6 +84,13 @@ int64_t Timekeeping::GetUnixTimestamp() {
     return g_bootEpoch + (int64_t)(Timekeeping::GetMilliseconds() / 1000);
 }
 
+bool Timekeeping::SetUnixTimestamp(int64_t unixSeconds) {
+    if (unixSeconds < 0 || unixSeconds > 4102444799LL)
+        return false;
+    g_bootEpoch = unixSeconds - (int64_t)(Timekeeping::GetMilliseconds() / 1000);
+    return true;
+}
+
 Timekeeping::DateTime Timekeeping::GetDateTime() {
     return EpochToDate(GetUnixTimestamp() + (int64_t)g_tzOffsetMinutes * 60);
 }
@@ -94,4 +101,4 @@ void Timekeeping::SetTZOffset(int totalMinutes) {
 
 int Timekeeping::GetTZOffset() {
     return g_tzOffsetMinutes;
-}
+}

kernel/src/Timekeeping/Time.hpp

@@ -53,6 +53,7 @@ namespace Timekeeping {
     void Init(uint16_t Year, uint8_t Month, uint8_t Day, uint8_t Hour, uint8_t Minute, uint8_t Second);
     int64_t GetUnixTimestamp();
     DateTime GetDateTime();
+    bool SetUnixTimestamp(int64_t unixSeconds);
 
     void SetTZOffset(int totalMinutes);
     int GetTZOffset();