better network info

src/app/widgets.rs

@@ -1,4 +1,4 @@
-use std::sync::LazyLock;
+use std::{net::Ipv4Addr, sync::LazyLock};
 
 use jocalsend::ReceiveRequest;
 use log::LevelFilter;
@@ -146,7 +146,11 @@ impl Widget for &mut App {
                     footer_right.inner(footer_margin),
                     buf,
                 );
-                NetworkInfoWidget.render(footer_left.inner(footer_margin), buf);
+                network_info(
+                    &self.service.config.local_ip_addr,
+                    footer_left.inner(footer_margin),
+                    buf,
+                );
                 receive_requests(
                     &rx_reqs,
                     &mut self.receiving_state,
@@ -354,18 +358,16 @@ fn peers(peers: &[Peer], state: &mut ListState, area: Rect, buf: &mut Buffer) {
     ratatui::widgets::StatefulWidget::render(list, area, buf, state);
 }
 
-#[derive(Debug, Clone)]
-pub struct NetworkInfoWidget;
+fn network_info(local_ip_addr: &Ipv4Addr, area: Rect, buf: &mut Buffer) {
+    let local_addr = format!("{local_ip_addr:?}:{}", jocalsend::DEFAULT_PORT);
+    let local_addr = local_addr.to_line().right_aligned();
+
+    let http = "HTTP address";
+    let http = Row::new(vec![http.to_line().left_aligned(), local_addr.clone()]).yellow();
 
-impl Widget for NetworkInfoWidget {
-    fn render(self, area: Rect, buf: &mut Buffer)
-    where
-        Self: Sized,
-    {
     let udp = "UDP socket";
     let udp = udp.to_line().left_aligned();
-        let uaddr = format!("{:?}", jocalsend::LISTENING_SOCKET_ADDR);
-        let udp = Row::new(vec![udp, uaddr.to_line().right_aligned()]).yellow();
+    let udp = Row::new(vec![udp, local_addr]).yellow();
 
     let mip = format!(
         "{:?}:{:?}",
@@ -379,15 +381,7 @@ impl Widget for NetworkInfoWidget {
     ])
     .yellow();
 
-        let haddr = format!("{:?}", jocalsend::LISTENING_SOCKET_ADDR);
-        let http = "HTTP address";
-        let http = Row::new(vec![
-            http.to_line().left_aligned(),
-            haddr.to_line().right_aligned(),
-        ])
-        .yellow();
-
-        let rows = vec![udp, multicast, http];
+    let rows = vec![http, udp, multicast];
     let widths = vec![Constraint::Percentage(50), Constraint::Percentage(50)];
 
     let title = Line::from(" Listeners ".bold()).centered();
@@ -400,7 +394,6 @@ impl Widget for NetworkInfoWidget {
     let table = Table::new(rows, widths).block(block);
     table.render(area, buf);
 }
-}
 
 // helpers
 fn centered_rect(area: Rect, horizontal: Constraint, vertical: Constraint) -> Rect {

src/lib.rs

@@ -7,11 +7,13 @@ pub mod transfer;
 use std::{
     collections::BTreeMap,
     fmt::Debug,
-    net::{Ipv4Addr, SocketAddr, SocketAddrV4},
+    net::{IpAddr, Ipv4Addr, SocketAddr, SocketAddrV4},
     sync::{Arc, OnceLock},
 };
 
+use error::LocalSendError;
 use julid::Julid;
+use local_ip_address::local_ip;
 use log::error;
 use models::{Device, FileMetadata};
 use serde::{Deserialize, Serialize};
@@ -195,18 +197,22 @@ pub struct Config {
     pub multicast_addr: SocketAddrV4,
     pub port: u16,
     pub download_dir: String,
-    pub local_ip_addr: SocketAddr,
+    pub local_ip_addr: Ipv4Addr,
 }
 
-impl Default for Config {
-    fn default() -> Self {
+impl Config {
+    pub fn new() -> error::Result<Self> {
         let home = std::env::home_dir().unwrap_or("/tmp".into());
         let dd = home.join("jocalsend-downloads");
-        Self {
+        let IpAddr::V4(local_ip_addr) = local_ip()? else {
+            return Err(LocalSendError::IPv6Unsupported);
+        };
+
+        Ok(Self {
             multicast_addr: SocketAddrV4::new(MULTICAST_IP, DEFAULT_PORT),
             port: DEFAULT_PORT,
             download_dir: dd.to_string_lossy().into(),
-            local_ip_addr: ([0u8; 4], DEFAULT_PORT).into(),
-        }
+            local_ip_addr,
+        })
     }
 }

src/main.rs

@@ -1,4 +1,4 @@
-use jocalsend::{Config, JocalService, Listeners, error, models::Device};
+use jocalsend::{Config, JocalService, Listeners, error::Result, models::Device};
 use log::{error, info};
 use ratatui::DefaultTerminal;
 use tokio::{sync::mpsc::unbounded_channel, task::JoinSet};
@@ -7,7 +7,7 @@ use tui_logger::{LevelFilter, init_logger, set_env_filter_from_env};
 mod app;
 use app::{App, CurrentScreen, Peer};
 
-fn main() -> error::Result<()> {
+fn main() -> Result<()> {
     let device = Device::default();
 
     if std::env::var("RUST_LOG").is_err() {
@@ -18,7 +18,7 @@ fn main() -> error::Result<()> {
     init_logger(LevelFilter::Info).map_err(|e| std::io::Error::other(format!("{e}")))?;
     set_env_filter_from_env(None);
 
-    let config = Config::default();
+    let config = Config::new()?;
 
     let mut terminal = ratatui::init();
     let result = start_and_run(&mut terminal, config, device);
@@ -32,7 +32,7 @@ async fn start_and_run(
     terminal: &mut DefaultTerminal,
     config: Config,
     device: Device,
-) -> error::Result<()> {
+) -> Result<()> {
     let (event_tx, event_listener) = unbounded_channel();
 
     let service = JocalService::new(device, config.clone(), event_tx)