add constants to routes

src/main.rs

@@ -54,6 +54,18 @@ struct Config {
     failback_delay: u64,
 }
 
+fn apply_env_overrides(mut config: Config) -> Config {
+    config.primary_interface =
+        std::env::var("PRIMARY_INTERFACE").unwrap_or(config.primary_interface);
+    config.secondary_interface =
+        std::env::var("SECONDARY_INTERFACE").unwrap_or(config.secondary_interface);
+    config.primary_gateway = std::env::var("PRIMARY_GATEWAY").unwrap_or(config.primary_gateway);
+    config.secondary_gateway =
+        std::env::var("SECONDARY_GATEWAY").unwrap_or(config.secondary_gateway);
+    config.ping_target = std::env::var("PING_TARGET").unwrap_or(config.ping_target);
+    config
+}
+
 #[tokio::main]
 async fn main() -> Result<()> {
     let env = Env::default().filter_or("RUST_LOG", "info");
@@ -64,22 +76,7 @@ async fn main() -> Result<()> {
     let config = Config::parse();
 
     // Override with environment variables if present
-    let primary_interface =
-        std::env::var("PRIMARY_INTERFACE").unwrap_or(config.primary_interface.clone());
-    let secondary_interface =
-        std::env::var("SECONDARY_INTERFACE").unwrap_or(config.secondary_interface.clone());
-    let primary_gateway =
-        std::env::var("PRIMARY_GATEWAY").unwrap_or(config.primary_gateway.clone());
-    let secondary_gateway =
-        std::env::var("SECONDARY_GATEWAY").unwrap_or(config.secondary_gateway.clone());
-    let ping_target = std::env::var("PING_TARGET").unwrap_or(config.ping_target.clone());
-
-    let mut config_with_env = config;
-    config_with_env.primary_interface = primary_interface;
-    config_with_env.secondary_interface = secondary_interface;
-    config_with_env.primary_gateway = primary_gateway;
-    config_with_env.secondary_gateway = secondary_gateway;
-    config_with_env.ping_target = ping_target;
+    let config_with_env = apply_env_overrides(config);
 
     debug!("Configuration: {:?}", config_with_env);
 
@@ -127,6 +124,45 @@ async fn main() -> Result<()> {
 
 use state_machine::StateMachine;
 
+async fn handle_ping_result(
+    result: pinger::PingResult,
+    interface_name: &str,
+    state_machine: &Arc<tokio::sync::Mutex<StateMachine>>,
+    last_failover: &Arc<tokio::sync::Mutex<Option<chrono::DateTime<Utc>>>>,
+    route_manager: &mut routing::RouteManager,
+    primary_gateway: &Ipv4Addr,
+    secondary_gateway: &Ipv4Addr,
+    config: &Config,
+) -> Result<()> {
+    debug!("{} ping result: {}", interface_name, result);
+    let mut sm = state_machine.lock().await;
+
+    // Add result to appropriate history based on interface
+    if interface_name == "primary" {
+        sm.add_primary_result(result);
+    } else {
+        sm.add_secondary_result(result);
+    }
+
+    if let Some((old_state, new_state)) = sm.update_state() {
+        let mut last_failover_lock = last_failover.lock().await;
+        if new_state == state_machine::State::Fallback
+            && old_state != state_machine::State::Fallback
+        {
+            *last_failover_lock = Some(Utc::now());
+        }
+        state_machine::handle_state_change(
+            new_state,
+            old_state,
+            route_manager,
+            primary_gateway,
+            secondary_gateway,
+            config,
+        )?;
+    }
+    Ok(())
+}
+
 async fn main_service(
     config: Config,
     primary_gateway: Ipv4Addr,
@@ -204,32 +240,30 @@ async fn main_service(
         tokio::select! {
             // Handle primary ping results
             Some(result) = primary_rx.recv() => {
-                debug!("Primary ping result: {}", result);
-                let mut sm = state_machine.lock().await;
-                sm.add_primary_result(result);
-
-                if let Some((old_state, new_state)) = sm.update_state() {
-                    let mut last_failover_lock = last_failover.lock().await;
-                    if new_state == state_machine::State::Fallback && old_state != state_machine::State::Fallback {
-                        *last_failover_lock = Some(Utc::now());
-                    }
-                    state_machine::handle_state_change(new_state, old_state, &mut route_manager, &primary_gateway, &secondary_gateway, &config)?;
-                }
+                handle_ping_result(
+                    result,
+                    "primary",
+                    &state_machine,
+                    &last_failover,
+                    &mut route_manager,
+                    &primary_gateway,
+                    &secondary_gateway,
+                    &config,
+                ).await?;
             }
 
             // Handle secondary ping results
             Some(result) = secondary_rx.recv() => {
-                debug!("Secondary ping result: {}", result);
-                let mut sm = state_machine.lock().await;
-                sm.add_secondary_result(result);
-
-                if let Some((old_state, new_state)) = sm.update_state() {
-                    let mut last_failover_lock = last_failover.lock().await;
-                    if new_state == state_machine::State::Fallback && old_state != state_machine::State::Fallback {
-                        *last_failover_lock = Some(Utc::now());
-                    }
-                    state_machine::handle_state_change(new_state, old_state, &mut route_manager, &primary_gateway, &secondary_gateway, &config)?;
-                }
+                handle_ping_result(
+                    result,
+                    "secondary",
+                    &state_machine,
+                    &last_failover,
+                    &mut route_manager,
+                    &primary_gateway,
+                    &secondary_gateway,
+                    &config,
+                ).await?;
             }
 
             // Handle shutdown signal

src/routing.rs

@@ -7,6 +7,11 @@ use std::net::Ipv4Addr;
 
 const MAIN_TABLE_ID: u8 = 254;
 
+// Route metrics - higher priority = lower number
+const FAILOVER_METRIC: u32 = 5;
+const PRIMARY_METRIC: u32 = 10;
+const SECONDARY_METRIC: u32 = 20;
+
 #[derive(Debug, Clone)]
 pub struct RouteInfo {
     pub gateway: Ipv4Addr,
@@ -60,8 +65,6 @@ impl RouteManager {
     }
 
     pub fn set_primary_route(&mut self, gateway: Ipv4Addr, interface: String) -> Result<()> {
-        let primary_metric = 10;
-
         // Remove existing routes for this interface if any
         if let Some(pos) = self.routes.iter().position(|r| r.interface == interface) {
             let existing_route = self.routes[pos].clone();
@@ -73,7 +76,7 @@ impl RouteManager {
         }
 
         // Add as primary route
-        self.add_route(gateway, interface, primary_metric)?;
+        self.add_route(gateway, interface, PRIMARY_METRIC)?;
         Ok(())
     }
 
@@ -88,20 +91,17 @@ impl RouteManager {
         self.set_primary_route(primary_gateway, primary_interface)?;
 
         // Set secondary route with metric 20 (lower priority)
-        let secondary_metric = 20;
-        self.add_route(secondary_gateway, secondary_interface, secondary_metric)?;
+        self.add_route(secondary_gateway, secondary_interface, SECONDARY_METRIC)?;
         Ok(())
     }
 
     pub fn add_failover_route(&mut self, gateway: Ipv4Addr, interface: String) -> Result<()> {
-        let failover_metric = 5; // Higher priority than both primary (10) and secondary (20)
-        self.add_route(gateway, interface, failover_metric)?;
+        self.add_route(gateway, interface, FAILOVER_METRIC)?;
         Ok(())
     }
 
     pub fn remove_failover_route(&mut self, gateway: Ipv4Addr, interface: String) -> Result<()> {
-        let failover_metric = 5;
-        self.remove_route(gateway, &interface, failover_metric)?;
+        self.remove_route(gateway, &interface, FAILOVER_METRIC)?;
         Ok(())
     }