From 739b4ee106105fb102eac7d5960eeeb660e97f47 Mon Sep 17 00:00:00 2001
From: L-Trump <37738631+L-Trump@users.noreply.github.com>
Date: Wed, 16 Apr 2025 21:58:39 +0800
Subject: [PATCH] fix: avoid add ipv6 listener automatically for specified ipv4
 listener (#782)

---
 easytier/src/instance/listeners.rs | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/easytier/src/instance/listeners.rs b/easytier/src/instance/listeners.rs
index 65350f9..26a2d97 100644
--- a/easytier/src/instance/listeners.rs
+++ b/easytier/src/instance/listeners.rs
@@ -1,4 +1,4 @@
-use std::{fmt::Debug, sync::Arc};
+use std::{fmt::Debug, net::IpAddr, str::FromStr, sync::Arc};
 
 use anyhow::Context;
 use async_trait::async_trait;
@@ -54,6 +54,14 @@ pub fn is_url_host_ipv6(l: &url::Url) -> bool {
     l.host_str().map_or(false, |h| h.contains(':'))
 }
 
+pub fn is_url_host_unspecified(l: &url::Url) -> bool {
+    if let Ok(ip) = IpAddr::from_str(l.host_str().unwrap_or_default()) {
+        ip.is_unspecified()
+    } else {
+        false
+    }
+}
+
 #[async_trait]
 pub trait TunnelHandlerForListener {
     async fn handle_tunnel(&self, tunnel: Box<dyn Tunnel>) -> Result<(), Error>;
@@ -126,7 +134,10 @@ impl<H: TunnelHandlerForListener + Send + Sync + 'static + Debug> ListenerManage
             )
             .await?;
 
-            if self.global_ctx.config.get_flags().enable_ipv6 && !is_url_host_ipv6(&l) {
+            if self.global_ctx.config.get_flags().enable_ipv6
+                && !is_url_host_ipv6(&l)
+                && is_url_host_unspecified(&l)
+            {
                 let mut ipv6_listener = l.clone();
                 ipv6_listener
                     .set_host(Some("[::]".to_string().as_str()))