Add time ping handling

src/TServer.cpp

@@ -156,6 +156,13 @@ size_t TServer::ClientCount() const {
     return mClients.size();
 }
 
+std::mt19937_64 TimeSyncRandomDevice(std::random_device{}());
+
+auto TimeSyncStart = std::chrono::steady_clock::now()
+    - std::chrono::duration_cast<std::chrono::steady_clock::duration>(
+        std::chrono::duration<double>(std::uniform_real_distribution<double>(0.0, 2592000.0)(TimeSyncRandomDevice))
+    );
+
 void TServer::GlobalParser(const std::weak_ptr<TClient>& Client, std::vector<uint8_t>&& Packet, TPPSMonitor& PPSMonitor, TNetwork& Network, bool udp) {
     constexpr std::string_view ABG = "ABG:";
     if (Packet.size() >= ABG.size() && std::equal(Packet.begin(), Packet.begin() + ABG.size(), ABG.begin(), ABG.end())) {
@@ -210,6 +217,24 @@ void TServer::GlobalParser(const std::weak_ptr<TClient>& Client, std::vector<uin
         return;
     }
     switch (Code) {
+    case 't':
+        if (!udp && Packet.size() == 9) {
+            uint64_t Time = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::steady_clock::now() - TimeSyncStart).count();
+
+            std::vector<uint8_t> ServerTime(sizeof(uint64_t));
+            std::memcpy(ServerTime.data(), &Time, sizeof(uint64_t));
+
+            auto Data = Packet;
+
+            beammp_debugf("Sending server time {} to client  '{}' ({}), client time: {}", Time, LockedClient->GetName(), LockedClient->GetID(), reinterpret_cast<uint64_t>(Data.data()));
+
+            Data.insert(Data.end(), ServerTime.begin(), ServerTime.end());
+
+            if (!Network.Respond(*LockedClient, Data, true)) {
+                Network.DisconnectClient(*LockedClient, "Failed to send time");
+            }
+        }
+        return;
     case 'H': // initial connection
         if (udp) {
             beammp_debugf("Received 'H' packet over UDP from client '{}' ({}), ignoring it", LockedClient->GetName(), LockedClient->GetID());