feat(gamestate/server): add blockedEvents system

This add 2 commands to block individual net game events

Author: Ekinoxx0

code/components/citizen-server-impl/include/state/ServerGameState.h

@@ -1476,6 +1476,7 @@ class ServerGameState : public ServerGameStatePublic, public fx::IAttached<fx::S
 	bool ValidateEntity(EntityLockdownMode entityLockdownMode, const fx::sync::SyncEntityPtr& entity);
 
 public:
+	std::unordered_set<uint32_t> blockedEvents;
 	std::function<bool()> GetGameEventHandler(const fx::ClientSharedPtr& client, const std::vector<uint16_t>& targetPlayers, net::Buffer&& buffer);
 
 private:

code/components/citizen-server-impl/src/state/ServerGameState.cpp

@@ -4644,6 +4644,21 @@ void ServerGameState::AttachToObject(fx::ServerInstanceBase* instance)
 
 		console::Printf("net", "---------------- END OBJECT ID DUMP ----------------\n");
 	});
+
+	// event is either eventNameHash for msgNetGameEventV2, or eventId when using v1
+	static auto blockNetGameEvent = instance->AddCommand("block_net_game_event", [this](uint32_t event)
+	{
+		auto& blockedEvents = this->blockedEvents;
+		if (blockedEvents.find(event) != blockedEvents.end())
+			return;
+		blockedEvents.insert(event);
+	});
+
+	static auto allowNetGameEvent = instance->AddCommand("allow_net_game_event", [this](uint32_t event)
+	{
+		auto& blockedEvents = this->blockedEvents;
+		blockedEvents.erase(event);
+	});
 }
 }
 
@@ -7512,6 +7527,15 @@ std::function<bool()> fx::ServerGameState::GetGameEventHandler(const fx::ClientS
 	}
 #endif
 
+	// This checks for event id rather than eventNameHash for compatibility until msgNetGameEventV2 is ready
+	if (blockedEvents.find(eventType) != blockedEvents.end())
+	{
+		return []()
+		{
+			return false;
+		};
+	}
+
 	// RDR3 remaps eventType on the client (netEventMgr_MapEventId)
 
 #if defined(STATE_FIVE) || defined(STATE_RDR3)
@@ -7640,7 +7664,15 @@ std::function<bool()> fx::ServerGameState::GetGameEventHandlerWithEvent(const fx
 	auto instance = m_instance;
 
 	const bool isReply = netGameEvent.isReply;
-	const uint32_t eventNameHash = netGameEvent.eventNameHash;
+	const uint32_t eventNameHash = netGameEvent.eventNameHash;
+
+	if (blockedEvents.find(eventNameHash) != blockedEvents.end())
+	{
+		return []()
+		{
+			return false;
+		};
+	}
 
 #if defined(STATE_FIVE) || defined(STATE_RDR3)
 #ifdef STATE_FIVE