Chore: refactor TUN

component/dialer/resolver.go

@@ -0,0 +1,28 @@
+package dialer
+
+import (
+	"context"
+	"net"
+)
+
+func init() {
+	// We must use this DialContext to query DNS
+	// when using net default resolver.
+	net.DefaultResolver.PreferGo = true
+	net.DefaultResolver.Dial = resolverDialContext
+}
+
+func resolverDialContext(ctx context.Context, network, address string) (net.Conn, error) {
+	d := &net.Dialer{}
+
+	interfaceName := DefaultInterface.Load()
+
+	if interfaceName != "" {
+		dstIP := net.ParseIP(address)
+		if dstIP != nil {
+			bindIfaceToDialer(interfaceName, d, network, dstIP)
+		}
+	}
+
+	return d.DialContext(ctx, network, address)
+}