feat: add operational reconnect and shutdown handling

Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>

src/errors.rs

@@ -17,7 +17,6 @@ pub enum TlsError {
     IdentityMismatch(String),
 
     #[error("certificate expired: {0}")]
-    #[allow(dead_code)]
     Expired(String),
 
     #[error("certificate verification failed: {0}")]
@@ -25,10 +24,6 @@ pub enum TlsError {
 
     #[error("I/O error: {0}")]
     Io(#[from] std::io::Error),
-
-    #[error("rustls error: {0}")]
-    #[allow(dead_code)]
-    Rustls(String),
 }
 
 /// Errors that occur during application-level authentication.
@@ -42,14 +37,6 @@ pub enum AuthError {
 
     #[error("auth not yet completed")]
     NotAuthenticated,
-
-    #[error("auth token expired")]
-    #[allow(dead_code)]
-    Expired,
-
-    #[error("too many auth attempts")]
-    #[allow(dead_code)]
-    TooManyAttempts,
 }
 
 /// Errors that occur during tunnel lifecycle operations.
@@ -65,65 +52,22 @@ pub enum TunnelError {
     BindError(String, String),
 
     #[error("connection refused: {0}")]
-    ConnectionRefused(String),
-
-    #[error("connection closed")]
     #[allow(dead_code)]
-    ConnectionClosed,
+    ConnectionRefused(String),
 
     #[error("port {0} already in use")]
     PortInUse(u16),
 
-    #[error("shutdown requested")]
-    #[allow(dead_code)]
-    Shutdown,
-
     #[error("I/O error: {0}")]
     Io(#[from] std::io::Error),
 
     #[error("protocol error: {0}")]
     Protocol(String),
 
-    #[error("timeout: {0}")]
-    #[allow(dead_code)]
-    Timeout(String),
-
     #[error("hostname error: {0}")]
     Host(#[from] HostError),
 }
 
-/// Errors returned by the connector side.
-#[allow(dead_code)]
-#[derive(Debug, Error)]
-pub enum ConnectorError {
-    #[error("TLS handshake failed: {0}")]
-    TlsHandshake(String),
-
-    #[error("server certificate verification failed: {0}")]
-    ServerCertVerification(String),
-
-    #[error("server certificate identity mismatch for {0}: {1}")]
-    ServerIdentityMismatch(String, String),
-
-    #[error("server certificate expired")]
-    ServerCertExpired,
-
-    #[error("auth rejected: {0}")]
-    AuthRejected(String),
-
-    #[error("connection failed: {0}")]
-    ConnectionFailed(String),
-
-    #[error("I/O error: {0}")]
-    Io(#[from] std::io::Error),
-
-    #[error("protocol error: {0}")]
-    Protocol(String),
-
-    #[error("timeout: {0}")]
-    Timeout(String),
-}
-
 /// Errors returned during hostname resolution.
 #[derive(Debug, Error)]
 pub enum HostError {