refactor: replace static with const for global constants (#494)

libs/hbb_common/src/keyboard.rs

@@ -28,7 +28,7 @@ impl FromStr for KeyboardMode {
 
 impl KeyboardMode {
     pub fn iter() -> Iter<'static, KeyboardMode> {
-        static KEYBOARD_MODES: [KeyboardMode; 4] = [
+        const KEYBOARD_MODES: [KeyboardMode; 4] = [
             KeyboardMode::Legacy,
             KeyboardMode::Map,
             KeyboardMode::Translate,

src/peer.rs

@@ -18,10 +18,10 @@ lazy_static::lazy_static! {
     pub(crate) static ref USER_STATUS: RwLock<UserStatusMap> = Default::default();
     pub(crate) static ref IP_CHANGES: Mutex<IpChangesMap> = Default::default();
 }
-pub static IP_CHANGE_DUR: u64 = 180;
-pub static IP_CHANGE_DUR_X2: u64 = IP_CHANGE_DUR * 2;
-pub static DAY_SECONDS: u64 = 3600 * 24;
-pub static IP_BLOCK_DUR: u64 = 60;
+pub const IP_CHANGE_DUR: u64 = 180;
+pub const IP_CHANGE_DUR_X2: u64 = IP_CHANGE_DUR * 2;
+pub const DAY_SECONDS: u64 = 3600 * 24;
+pub const IP_BLOCK_DUR: u64 = 60;
 
 #[derive(Debug, Default, Serialize, Deserialize, Clone)]
 pub(crate) struct PeerInfo {

src/rendezvous_server.rs

@@ -58,7 +58,7 @@ type Sender = mpsc::UnboundedSender<Data>;
 type Receiver = mpsc::UnboundedReceiver<Data>;
 static ROTATION_RELAY_SERVER: AtomicUsize = AtomicUsize::new(0);
 type RelayServers = Vec<String>;
-static CHECK_RELAY_TIMEOUT: u64 = 3_000;
+const CHECK_RELAY_TIMEOUT: u64 = 3_000;
 static ALWAYS_USE_RELAY: AtomicBool = AtomicBool::new(false);
 
 #[derive(Clone)]