roowhod: move config normalization to config.rs

src/bin/roowhod.rs

@@ -3,6 +3,7 @@ use std::{
     os::fd::{AsRawFd, FromRawFd, OwnedFd},
     path::PathBuf,
     sync::Arc,
+    time::Duration,
 };
 
 use anyhow::Context;
@@ -21,9 +22,6 @@ use roowho2_lib::server::{
     varlink_api::varlink_client_server_task,
 };
 
-/// Default maximum number of distinct hosts to keep rwhod status records for at the same time.
-const DEFAULT_MAX_STATUS_ENTRIES: usize = 4096;
-
 #[derive(Parser)]
 #[command(
     author = "Programvareverkstedet <projects@pvv.ntnu.no>",
@@ -80,19 +78,9 @@ async fn main() -> anyhow::Result<()> {
 
     let mut join_set = tokio::task::JoinSet::new();
 
-    let max_status_entries = match config.rwhod.max_status_entries {
-        Some(0) => {
-            tracing::warn!(
-                "rwhod.max_status_entries is set to 0, remapping to default value of {}",
-                DEFAULT_MAX_STATUS_ENTRIES
-            );
-            DEFAULT_MAX_STATUS_ENTRIES
-        }
-        Some(max_status_entries) => max_status_entries,
-        None => DEFAULT_MAX_STATUS_ENTRIES,
-    };
-    let whod_status_store: RwhodStatusStore =
-        Arc::new(RwLock::new(RwhodStatusRegistry::new(max_status_entries)));
+    let whod_status_store: RwhodStatusStore = Arc::new(RwLock::new(RwhodStatusRegistry::new(
+        config.rwhod.max_status_entries(),
+    )));
 
     let client_server_token = CancellationToken::new();
     let client_server_token_ = client_server_token.clone();
@@ -122,7 +110,7 @@ async fn main() -> anyhow::Result<()> {
             whod_status_store.clone(),
             rwhod_ignore_list.clone(),
             config.rwhod.interfaces.clone(),
-            config.rwhod.send_interval_seconds,
+            config.rwhod.send_interval(),
         ));
     } else {
         tracing::debug!("RWHOD server is disabled in configuration");
@@ -154,32 +142,17 @@ async fn ctrl_c_handler() -> anyhow::Result<()> {
         .map_err(|e| anyhow::anyhow!("Failed to listen for Ctrl-C: {}", e))
 }
 
-/// Default interval, in seconds, between rwhod status packet broadcasts.
-const DEFAULT_SEND_INTERVAL_SECONDS: u64 = 60;
-
 async fn rwhod_server(
     socket: UdpSocket,
     whod_status_store: RwhodStatusStore,
     ignore_list: Option<IgnoreList>,
     allowed_interfaces: Option<HashSet<String>>,
-    send_interval_seconds: Option<u64>,
+    send_interval: Duration,
 ) -> anyhow::Result<()> {
     let socket = Arc::new(socket);
 
     let interfaces =
         roowho2_lib::server::rwhod::determine_relevant_interfaces(allowed_interfaces.as_ref())?;
-    let send_interval_seconds = match send_interval_seconds {
-        Some(0) => {
-            tracing::warn!(
-                "rwhod.send_interval_seconds is set to 0, remapping to default value of {} seconds",
-                DEFAULT_SEND_INTERVAL_SECONDS
-            );
-            DEFAULT_SEND_INTERVAL_SECONDS
-        }
-        Some(seconds) => seconds,
-        None => DEFAULT_SEND_INTERVAL_SECONDS,
-    };
-    let send_interval = std::time::Duration::from_secs(send_interval_seconds);
     let sender_task =
         rwhod_packet_sender_task(socket.clone(), interfaces, ignore_list, send_interval);
     let receiver_task = rwhod_packet_receiver_task(socket.clone(), whod_status_store);

src/server/config.rs

@@ -1,4 +1,4 @@
-use std::{collections::HashSet, path::PathBuf};
+use std::{collections::HashSet, path::PathBuf, time::Duration};
 
 use serde::{Deserialize, Serialize};
 
@@ -6,6 +6,12 @@ pub const DEFAULT_CONFIG_PATH: &str = "/etc/roowho2/config.toml";
 
 pub const DEFAULT_CLIENT_SOCKET_PATH: &str = "/run/roowho2/server_client.sock";
 
+/// Default interval between rwhod status packet broadcasts.
+const DEFAULT_SEND_INTERVAL_SECONDS: u64 = 60;
+
+/// Default maximum number of distinct hosts to keep rwhod status records for at the same time.
+const DEFAULT_MAX_STATUS_ENTRIES: usize = 4096;
+
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub struct Config {
     /// Logging level for the daemon.
@@ -57,6 +63,40 @@ pub struct RwhodConfig {
     pub max_status_entries: Option<usize>,
 }
 
+impl RwhodConfig {
+    /// Resolves [`Self::send_interval_seconds`] into a concrete interval.
+    pub fn send_interval(&self) -> Duration {
+        let seconds = match self.send_interval_seconds {
+            Some(0) => {
+                tracing::warn!(
+                    "rwhod.send_interval_seconds is set to 0, remapping to default value of {} seconds",
+                    DEFAULT_SEND_INTERVAL_SECONDS
+                );
+                DEFAULT_SEND_INTERVAL_SECONDS
+            }
+            Some(seconds) => seconds,
+            None => DEFAULT_SEND_INTERVAL_SECONDS,
+        };
+
+        Duration::from_secs(seconds)
+    }
+
+    /// Resolves [`Self::max_status_entries`] into a concrete limit.
+    pub fn max_status_entries(&self) -> usize {
+        match self.max_status_entries {
+            Some(0) => {
+                tracing::warn!(
+                    "rwhod.max_status_entries is set to 0, remapping to default value of {}",
+                    DEFAULT_MAX_STATUS_ENTRIES
+                );
+                DEFAULT_MAX_STATUS_ENTRIES
+            }
+            Some(max_status_entries) => max_status_entries,
+            None => DEFAULT_MAX_STATUS_ENTRIES,
+        }
+    }
+}
+
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub struct FingerdConfig {
     /// Enable or disable the fingerd server functionality.