Initial commit: all files from local directory

src/error.rs

@@ -0,0 +1,39 @@
+//! Error types for the DNS server
+#![allow(dead_code)]
+#[allow(unused_variables)]
+
+use std::io;
+use rusqlite;
+use thiserror::Error;
+
+/// Errors that can occur in the DNS server
+#[derive(Debug, Error)]
+pub enum DnsError {
+    /// I/O errors from the underlying system
+    #[error("I/O error: {0}")]
+    Io(#[from] io::Error),
+    
+    /// Database errors from SQLite operations
+    #[error("Database error: {0}")]
+    Db(#[from] rusqlite::Error),
+    
+    /// Protocol errors related to DNS message format or content
+    #[error("Protocol error: {0}")]
+    Protocol(String),
+    
+    /// Configuration errors from invalid settings
+    #[error("Configuration error: {0}")]
+    Config(String),
+    
+    /// Parse errors from string to number conversions
+    #[error("Parse error: {0}")]
+    Parse(#[from] std::num::ParseIntError),
+    
+    /// Base64 decoding errors
+    #[error("Base64 error: {0}")]
+    Base64(String),
+    
+    /// Shutdown signal received
+    #[error("Shutdown signal received")]
+    Shutdown,
+}