Add native doctor auth diagnostics

src/protocol.rs

@@ -38,6 +38,7 @@ pub enum PacketKind {
     StreamWindowAdjust = 22,
     StreamEof = 23,
     StreamClose = 24,
+    NativeAuthCheckOk = 25,
 }
 
 impl TryFrom<u8> for PacketKind {
@@ -69,6 +70,7 @@ impl TryFrom<u8> for PacketKind {
             22 => Self::StreamWindowAdjust,
             23 => Self::StreamEof,
             24 => Self::StreamClose,
+            25 => Self::NativeAuthCheckOk,
             _ => bail!("unknown packet kind {value}"),
         })
     }
@@ -276,6 +278,16 @@ pub struct NativeAuthOkBody {
     pub ok: NativeAuthOk,
 }
 
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct NativeAuthCheckOkBody {
+    pub requested_user: String,
+    pub native_auth_enabled: bool,
+    pub allow_tcp_forwarding: bool,
+    pub allow_remote_forwarding: bool,
+    pub allow_agent_forwarding: bool,
+    pub policy_flags: Vec<String>,
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct AttachOk {
     pub client_id: [u8; 16],