Add Mosh parity hardening

src/config.rs

@@ -14,6 +14,8 @@ pub struct ServerConfig {
     pub allow_attach_tickets: bool,
     pub client_timeout_secs: u64,
     pub retransmit_window: usize,
+    #[serde(default = "default_output_frame_interval_ms")]
+    pub output_frame_interval_ms: u64,
     pub default_input_mode: String,
     pub prewarm_sessions: Vec<String>,
     pub create_on_attach: bool,
@@ -68,8 +70,9 @@ impl Default for ServerConfig {
             auth_ttl_secs: 30,
             attach_ticket_ttl_secs: 3600,
             allow_attach_tickets: true,
-            client_timeout_secs: 86400,
+            client_timeout_secs: 2_592_000,
             retransmit_window: 256,
+            output_frame_interval_ms: default_output_frame_interval_ms(),
             default_input_mode: "read-write".to_string(),
             prewarm_sessions: vec!["default".to_string()],
             create_on_attach: true,
@@ -132,6 +135,8 @@ pub struct ClientConfig {
     /// full-screen TUI, and cleared the instant packets resume. Default on.
     #[serde(default = "default_true")]
     pub disconnect_status: bool,
+    #[serde(default = "default_escape_key")]
+    pub escape_key: String,
     #[serde(default = "default_send_env")]
     pub send_env: Vec<String>,
     #[serde(default)]
@@ -205,6 +210,7 @@ impl Default for ClientConfig {
             use_ssh_agent: true,
             forward_agent: false,
             disconnect_status: true,
+            escape_key: default_escape_key(),
             send_env: default_send_env(),
             set_env: HashMap::new(),
             extensions: HashMap::new(),
@@ -231,6 +237,10 @@ fn default_native_auth_rate_limit_per_minute() -> u32 {
     30
 }
 
+fn default_output_frame_interval_ms() -> u64 {
+    16
+}
+
 fn default_rekey_after_packets() -> u64 {
     // Rotate well before any AEAD nonce-reuse concern; ChaCha20-Poly1305 with a
     // per-direction monotonic seq is safe far beyond this, but a bounded epoch
@@ -259,6 +269,10 @@ fn default_known_hosts() -> String {
     "~/.config/dosh/known_hosts".to_string()
 }
 
+fn default_escape_key() -> String {
+    "^]".to_string()
+}
+
 fn default_identity_files() -> Vec<String> {
     vec!["~/.ssh/id_ed25519".to_string()]
 }