From c41f3c46a00fe78e1ec516c289d779312d2b9d55 Mon Sep 17 00:00:00 2001
From: ssrlive <30760636+ssrlive@users.noreply.github.com>
Date: Wed, 23 Aug 2023 23:13:16 +0800
Subject: [PATCH] minor changes

---
 src/tun2proxy.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/tun2proxy.rs b/src/tun2proxy.rs
index 0a13086..864de70 100644
--- a/src/tun2proxy.rs
+++ b/src/tun2proxy.rs
@@ -707,8 +707,9 @@ impl<'a> TunToProxy<'a> {
             } else if info.protocol == IpProtocol::Udp {
                 let port = info.dst.port();
                 let payload = &frame[payload_offset..payload_offset + payload_size];
-                if let (Some(virtual_dns), true) = (&mut self.options.virtual_dns, port == DNS_PORT) {
+                if self.options.virtual_dns.is_some() && port == DNS_PORT {
                     log::info!("DNS query via virtual DNS {} ({})", info, origin_dst);
+                    let virtual_dns = self.options.virtual_dns.as_mut().ok_or("")?;
                     let response = virtual_dns.receive_query(payload)?;
                     self.send_udp_packet_to_client(origin_dst, info.src, response.as_slice())?;
                 } else {