multiple dns servers and search domains (#306)

* multiple dns and search domains

* capitalize

src-tauri/Cargo.toml

@@ -22,7 +22,7 @@ base64 = "0.22"
 clap = { version = "4.5", features = ["derive", "env"] }
 chrono = { version = "0.4", features = ["serde"] }
 dark-light = "1.1"
-defguard_wireguard_rs = { git = "https://github.com/DefGuard/wireguard-rs.git", rev = "v0.4.9" }
+defguard_wireguard_rs = { git = "https://github.com/DefGuard/wireguard-rs.git", rev = "v0.4.10" }
 dirs = "5.0"
 lazy_static = "1.5"
 local-ip-address = "0.6"

src-tauri/src/service/mod.rs

@@ -110,19 +110,31 @@ impl DesktopDaemonService for DaemonService {
             })?;
         }
 
-        let dns: Vec<IpAddr> = request
-            .dns
-            .into_iter()
-            .filter_map(|s| s.parse().ok())
-            .collect();
+        // The WireGuard DNS config value can be a list of IP addresses and domain names, which will be
+        // used as DNS servers and search domains respectively.
+        let dns_string = request.dns.unwrap_or_default();
+        let dns_entries = dns_string
+            .split(',')
+            .map(|s| s.trim())
+            .collect::<Vec<&str>>();
+        // We assume that every entry that can't be parsed as an IP address is a domain name.
+        let mut dns = Vec::new();
+        let mut search_domains = Vec::new();
+        for entry in dns_entries {
+            if let Ok(ip) = entry.parse::<IpAddr>() {
+                dns.push(ip);
+            } else {
+                search_domains.push(entry);
+            }
+        }
 
         // configure interface
         debug!("Configuring new interface {ifname} with configuration: {config:?}");
 
         #[cfg(not(windows))]
         let configure_interface_result = wgapi.configure_interface(&config);
         #[cfg(windows)]
-        let configure_interface_result = wgapi.configure_interface(&config, &dns);
+        let configure_interface_result = wgapi.configure_interface(&config, &dns, &search_domains);
 
         configure_interface_result.map_err(|err| {
             let msg = format!("Failed to configure WireGuard interface {ifname}: {err}");
@@ -144,7 +156,7 @@ impl DesktopDaemonService for DaemonService {
             // Configure DNS
             if !dns.is_empty() {
                 debug!("Configuring DNS for interface {ifname} with config: {dns:?}");
-                wgapi.configure_dns(&dns).map_err(|err| {
+                wgapi.configure_dns(&dns, &search_domains).map_err(|err| {
                     let msg =
                         format!("Failed to configure DNS for WireGuard interface {ifname}: {err}");
                     error!("{msg}");