From 17769e1a8f6eab4b1c0a244c9c89baaf8dc8b6a3 Mon Sep 17 00:00:00 2001
From: gVisor bot <gvisor-bot@google.com>
Date: Tue, 14 Jun 2022 12:35:24 +0800
Subject: [PATCH] fix: udp listen use udp4 when general.ipv6 is false;
 general.ipv6 default value is true

---
 component/dialer/dialer.go | 4 ++++
 config/config.go           | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/component/dialer/dialer.go b/component/dialer/dialer.go
index 091f2efa..e0401d42 100644
--- a/component/dialer/dialer.go
+++ b/component/dialer/dialer.go
@@ -57,6 +57,10 @@ func ListenPacket(ctx context.Context, network, address string, options ...Optio
 		o(cfg)
 	}
 
+	if DisableIPv6 {
+		network = "udp4"
+	}
+
 	lc := &net.ListenConfig{}
 	if cfg.interfaceName != "" {
 		addr, err := bindIfaceToListenConfig(cfg.interfaceName, lc, network, address)
diff --git a/config/config.go b/config/config.go
index a38c90b2..604e38b7 100644
--- a/config/config.go
+++ b/config/config.go
@@ -254,6 +254,7 @@ func UnmarshalRawConfig(buf []byte) (*RawConfig, error) {
 	rawCfg := &RawConfig{
 		AllowLan:       false,
 		BindAddress:    "*",
+		IPv6:           true,
 		Mode:           T.Rule,
 		GeodataMode:    C.GeodataMode,
 		GeodataLoader:  "memconservative",
@@ -281,6 +282,7 @@ func UnmarshalRawConfig(buf []byte) (*RawConfig, error) {
 		},
 		DNS: RawDNS{
 			Enable:       false,
+			IPv6:         false,
 			UseHosts:     true,
 			EnhancedMode: C.DNSMapping,
 			FakeIPRange:  "198.18.0.1/16",