xudp

https://github.com/XTLS/Xray-core/pull/7327#issuecomment-6634105144

Fixes https://github.com/XTLS/Xray-core/issues/7318

.github/docker/Dockerfile

@@ -20,7 +20,7 @@ RUN cat <<EOF >/tmp/usr/local/etc/xray/00_log.json
 {
   "log": {
     "error": "/var/log/xray/error.log",
-    "loglevel": "warning",
+    "logLevel": "warning",
     "access": "none",
     "dnsLog": false
   }

.github/docker/Dockerfile.usa

@@ -20,7 +20,7 @@ RUN cat <<EOF >/tmp/usr/local/etc/xray/00_log.json
 {
   "log": {
     "error": "/var/log/xray/error.log",
-    "loglevel": "warning",
+    "logLevel": "warning",
     "access": "none",
     "dnsLog": false
   }

app/proxyman/outbound/handler.go

@@ -217,6 +217,7 @@ func (h *Handler) Dispatch(ctx context.Context, link *transport.Link) {
 		if ob.Target.Network == net.Network_UDP && ob.Target.Port == 443 {
 			switch h.udp443 {
 			case "reject":
+				proxy.DropUDP(ctx, link.Reader)
 				test(errors.New("XUDP rejected UDP/443 traffic"))
 				return
 			case "skip":

common/buf/io.go

@@ -73,7 +73,7 @@ func (r *TimeoutWrapperReader) ReadMultiBufferTimeout(duration time.Duration) (M
 		}
 		return r.mb, r.err
 	case <-timeout:
-		return nil, nil
+		return nil, ErrReadTimeout
 	}
 }
 

common/reflect/marshal_test.go

@@ -134,7 +134,7 @@ func TestMarshalConfigJson(t *testing.T) {
 func getConfig() string {
 	return `{
   "log": {
-    "loglevel": "debug"
+    "logLevel": "debug"
   },
   "stats": {},
   "policy": {

go.mod

@@ -10,7 +10,7 @@ require (
 	github.com/google/go-cmp v0.7.0
 	github.com/google/uuid v1.6.0
 	github.com/gorilla/websocket v1.5.3
-	github.com/klauspost/cpuid/v2 v2.4.1
+	github.com/klauspost/cpuid/v2 v2.4.2
 	github.com/libp2p/go-nat v1.0.1-0.20250821073202-01afc089f138
 	github.com/miekg/dns v1.1.73
 	github.com/pelletier/go-toml v1.9.5

go.sum

@@ -35,8 +35,8 @@ github.com/juju/ratelimit v1.0.2 h1:sRxmtRiajbvrcLQT7S+JbqU0ntsb9W2yhSdNN8tWfaI=
 github.com/juju/ratelimit v1.0.2/go.mod h1:qapgC/Gy+xNh9UxzV13HGGl/6UXNN+ct+vwSgWNm/qk=
 github.com/klauspost/compress v1.20.0 h1:a3C1ke2ohxFymNlb2HWAHjDeKCI90scRskErZkR0ezA=
 github.com/klauspost/compress v1.20.0/go.mod h1:LUdAzn7YLVvxLpc7y3V1m40wESHTgc1422pwwBSKYuI=
-github.com/klauspost/cpuid/v2 v2.4.1 h1:I9KxadAkvo+QjtcEE2f2tyfEvmIla/T0m+14PrZNl0U=
+github.com/klauspost/cpuid/v2 v2.4.2 h1:xRw7IZEsAgVCp6trS/DgWbTAqpixhmywgVgBjYGg1bQ=
-github.com/klauspost/cpuid/v2 v2.4.1/go.mod h1:19jmZ9mjzoF//ddRSUsv0zfBTJWh3QJh9FNxZTMrGxU=
+github.com/klauspost/cpuid/v2 v2.4.2/go.mod h1:19jmZ9mjzoF//ddRSUsv0zfBTJWh3QJh9FNxZTMrGxU=
 github.com/koron/go-ssdp v0.0.4 h1:1IDwrghSKYM7yLf7XCzbByg2sJ/JcNOZRXS2jczTwz0=
 github.com/koron/go-ssdp v0.0.4/go.mod h1:oDXq+E5IL5q0U8uSBcoAXzTzInwy5lEgC91HoKtbmZk=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=

infra/conf/freedom.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/geodata"
+	"github.com/xtls/xray-core/common/log"
 	xnet "github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/protocol"
 	"github.com/xtls/xray-core/proxy/freedom"
@@ -48,6 +49,8 @@ type FreedomFinalRuleConfig struct {
 	Network    *NetworkList `json:"network"`
 	Port       *PortList    `json:"port"`
 	IP         *StringList  `json:"ip"`
+	Delay      *Int32Range  `json:"delay"`
+	LogLevel   string       `json:"logLevel"`
 	BlockDelay *Int32Range  `json:"blockDelay"`
 }
 
@@ -280,10 +283,37 @@ func (c *FreedomFinalRuleConfig) Build() (*freedom.FinalRuleConfig, error) {
 	}
 
 	if c.BlockDelay != nil {
-		rule.BlockDelay = &freedom.Range{
+		errors.PrintDeprecatedFeatureWarning("finalRules.blockDelay", "finalRules.delay")
-			Min: uint64(c.BlockDelay.From),
+		c.Delay = c.BlockDelay
-			Max: uint64(c.BlockDelay.To),
 	}
+
+	if rule.Action != freedom.RuleAction_Block {
+		if c.Delay != nil || c.LogLevel != "" {
+			return nil, errors.New("delay and logLevel are only supported for block finalRules")
+		}
+		return rule, nil
+	}
+
+	if c.Delay != nil {
+		rule.Delay = &freedom.Range{
+			Min: uint64(c.Delay.From),
+			Max: uint64(c.Delay.To),
+		}
+	}
+
+	switch strings.ToLower(c.LogLevel) {
+	case "", "info":
+		rule.LogLevel = log.Severity_Info.Enum()
+	case "none":
+		rule.LogLevel = log.Severity_Unknown.Enum()
+	case "debug":
+		rule.LogLevel = log.Severity_Debug.Enum()
+	case "warning":
+		rule.LogLevel = log.Severity_Warning.Enum()
+	case "error":
+		rule.LogLevel = log.Severity_Error.Enum()
+	default:
+		return nil, errors.New("unknown finalRules.logLevel: ", c.LogLevel)
 	}
 
 	return rule, nil

infra/conf/freedom_test.go

@@ -4,6 +4,7 @@ import (
 	"testing"
 
 	"github.com/xtls/xray-core/common/geodata"
+	"github.com/xtls/xray-core/common/log"
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/protocol"
 	. "github.com/xtls/xray-core/infra/conf"
@@ -46,7 +47,8 @@ func TestFreedomConfig(t *testing.T) {
 					"network": "tcp,udp",
 					"port": "53,443",
 					"ip": ["10.0.0.0/8", "2001:db8::/32"],
-					"blockDelay": "30-60"
+					"delay": "30-60",
+					"logLevel": "debug"
 				}, {
 					"action": "allow",
 					"network": ["udp"]
@@ -86,10 +88,8 @@ func TestFreedomConfig(t *testing.T) {
 								},
 							},
 						},
-						BlockDelay: &freedom.Range{
+						Delay:    &freedom.Range{Min: 30, Max: 60},
-							Min: 30,
+						LogLevel: log.Severity_Debug.Enum(),
-							Max: 60,
-						},
 					},
 					{
 						Action:   freedom.RuleAction_Allow,

infra/conf/log.go

@@ -18,7 +18,7 @@ func DefaultLogConfig() *log.Config {
 type LogConfig struct {
 	AccessLog   string `json:"access"`
 	ErrorLog    string `json:"error"`
-	LogLevel    string `json:"loglevel"`
+	LogLevel    string `json:"logLevel"`
 	DNSLog      bool   `json:"dnsLog"`
 	MaskAddress string `json:"maskAddress"`
 }

infra/conf/serial/loader_test.go

@@ -18,7 +18,7 @@ func TestLoaderError(t *testing.T) {
 				"log": {
 					// abcd
 					0,
-					"loglevel": "info"
+					"logLevel": "info"
 				}
 		}`,
 			Output: "line 4 char 6",
@@ -27,7 +27,7 @@ func TestLoaderError(t *testing.T) {
 			Input: `{
 				"log": {
 					// abcd
-					"loglevel": "info",
+					"logLevel": "info",
 				}
 		}`,
 			Output: "line 5 char 5",

infra/conf/xray_test.go

@@ -42,7 +42,7 @@ func TestXrayConfig(t *testing.T) {
 			Input: `{
 				"log": {
 					"access": "/var/log/xray/access.log",
-					"loglevel": "error",
+					"logLevel": "error",
 					"error": "/var/log/xray/error.log"
 				},
 				"inbounds": [{

proxy/blackhole/blackhole.go

@@ -9,11 +9,10 @@ import (
 
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
-	"github.com/xtls/xray-core/common/dice"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/session"
-	"github.com/xtls/xray-core/common/signal"
+	"github.com/xtls/xray-core/proxy"
 	"github.com/xtls/xray-core/transport"
 	"github.com/xtls/xray-core/transport/internet"
 )
@@ -69,14 +68,8 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 	}
 	defer common.Interrupt(link.Writer)
 	defer common.Interrupt(link.Reader)
-	// wait to drain all the possible incoming UDP data
 	if ob.Target.Network == net.Network_UDP {
-		ctx, cancel := context.WithCancel(ctx)
+		proxy.DropUDP(ctx, link.Reader)
-		timer := signal.CancelAfterInactivity(ctx, func() {
-			cancel()
-		}, time.Duration(30+dice.Roll(61))*time.Second)
-		go buf.Copy(link.Reader, buf.Discard, buf.UpdateActivity(timer))
-		<-ctx.Done()
 	}
 	return nil
 }

proxy/drop.go

@@ -0,0 +1,24 @@
+package proxy
+
+import (
+	"context"
+	"math/rand/v2"
+	"time"
+
+	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/buf"
+	"github.com/xtls/xray-core/common/signal"
+)
+
+// wait to drain all the possible incoming UDP data
+// because re-established QUIC UDP may bypass the sniffer
+func DropUDP(ctx context.Context, reader buf.Reader) {
+	ctx, cancel := context.WithCancel(ctx)
+	timer := signal.CancelAfterInactivity(ctx, func() {
+		cancel()
+	}, time.Duration(30+rand.N(60))*time.Second)
+	context.AfterFunc(ctx, func() {
+		common.Interrupt(reader)
+	})
+	buf.Copy(reader, buf.Discard, buf.UpdateActivity(timer))
+}

proxy/freedom/config.pb.go

@@ -8,6 +8,7 @@ package freedom
 
 import (
 	geodata "github.com/xtls/xray-core/common/geodata"
+	log "github.com/xtls/xray-core/common/log"
 	net "github.com/xtls/xray-core/common/net"
 	protocol "github.com/xtls/xray-core/common/protocol"
 	internet "github.com/xtls/xray-core/transport/internet"
@@ -357,7 +358,8 @@ type FinalRuleConfig struct {
 	Networks      []net.Network          `protobuf:"varint,2,rep,packed,name=networks,proto3,enum=xray.common.net.Network" json:"networks,omitempty"`
 	PortList      *net.PortList          `protobuf:"bytes,3,opt,name=port_list,json=portList,proto3" json:"port_list,omitempty"`
 	Ip            []*geodata.IPRule      `protobuf:"bytes,4,rep,name=ip,proto3" json:"ip,omitempty"`
-	BlockDelay    *Range                 `protobuf:"bytes,5,opt,name=block_delay,json=blockDelay,proto3" json:"block_delay,omitempty"`
+	Delay         *Range                 `protobuf:"bytes,5,opt,name=delay,proto3" json:"delay,omitempty"`
+	LogLevel      *log.Severity          `protobuf:"varint,6,opt,name=log_level,json=logLevel,proto3,enum=xray.common.log.Severity,oneof" json:"log_level,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -420,13 +422,20 @@ func (x *FinalRuleConfig) GetIp() []*geodata.IPRule {
 	return nil
 }
 
-func (x *FinalRuleConfig) GetBlockDelay() *Range {
+func (x *FinalRuleConfig) GetDelay() *Range {
 	if x != nil {
-		return x.BlockDelay
+		return x.Delay
 	}
 	return nil
 }
 
+func (x *FinalRuleConfig) GetLogLevel() log.Severity {
+	if x != nil && x.LogLevel != nil {
+		return *x.LogLevel
+	}
+	return log.Severity(0)
+}
+
 type Config struct {
 	state               protoimpl.MessageState  `protogen:"open.v1"`
 	DomainStrategy      internet.DomainStrategy `protobuf:"varint,1,opt,name=domain_strategy,json=domainStrategy,proto3,enum=xray.transport.internet.DomainStrategy" json:"domain_strategy,omitempty"`
@@ -523,7 +532,7 @@ var File_proxy_freedom_config_proto protoreflect.FileDescriptor
 
 const file_proxy_freedom_config_proto_rawDesc = "" +
 	"\n" +
-	"\x1aproxy/freedom/config.proto\x12\x12xray.proxy.freedom\x1a!common/protocol/server_spec.proto\x1a\x1ftransport/internet/config.proto\x1a\x15common/net/port.proto\x1a\x18common/net/network.proto\x1a\x1bcommon/geodata/geodat.proto\"S\n" +
+	"\x1aproxy/freedom/config.proto\x12\x12xray.proxy.freedom\x1a!common/protocol/server_spec.proto\x1a\x1ftransport/internet/config.proto\x1a\x15common/net/port.proto\x1a\x18common/net/network.proto\x1a\x1bcommon/geodata/geodat.proto\x1a\x14common/log/log.proto\"S\n" +
 	"\x13DestinationOverride\x12<\n" +
 	"\x06server\x18\x01 \x01(\v2$.xray.common.protocol.ServerEndpointR\x06server\"\x98\x02\n" +
 	"\bFragment\x12!\n" +
@@ -549,14 +558,16 @@ const file_proxy_freedom_config_proto_rawDesc = "" +
 	"\bapply_to\x18\x06 \x01(\tR\aapplyTo\"+\n" +
 	"\x05Range\x12\x10\n" +
 	"\x03min\x18\x01 \x01(\x04R\x03min\x12\x10\n" +
-	"\x03max\x18\x02 \x01(\x04R\x03max\"\xa0\x02\n" +
+	"\x03max\x18\x02 \x01(\x04R\x03max\"\xe0\x02\n" +
 	"\x0fFinalRuleConfig\x126\n" +
 	"\x06action\x18\x01 \x01(\x0e2\x1e.xray.proxy.freedom.RuleActionR\x06action\x124\n" +
 	"\bnetworks\x18\x02 \x03(\x0e2\x18.xray.common.net.NetworkR\bnetworks\x126\n" +
 	"\tport_list\x18\x03 \x01(\v2\x19.xray.common.net.PortListR\bportList\x12+\n" +
-	"\x02ip\x18\x04 \x03(\v2\x1b.xray.common.geodata.IPRuleR\x02ip\x12:\n" +
+	"\x02ip\x18\x04 \x03(\v2\x1b.xray.common.geodata.IPRuleR\x02ip\x12/\n" +
-	"\vblock_delay\x18\x05 \x01(\v2\x19.xray.proxy.freedom.RangeR\n" +
+	"\x05delay\x18\x05 \x01(\v2\x19.xray.proxy.freedom.RangeR\x05delay\x12;\n" +
-	"blockDelay\"\xaf\x03\n" +
+	"\tlog_level\x18\x06 \x01(\x0e2\x19.xray.common.log.SeverityH\x00R\blogLevel\x88\x01\x01B\f\n" +
+	"\n" +
+	"_log_level\"\xaf\x03\n" +
 	"\x06Config\x12P\n" +
 	"\x0fdomain_strategy\x18\x01 \x01(\x0e2'.xray.transport.internet.DomainStrategyR\x0edomainStrategy\x12Z\n" +
 	"\x14destination_override\x18\x03 \x01(\v2'.xray.proxy.freedom.DestinationOverrideR\x13destinationOverride\x12\x1d\n" +
@@ -599,7 +610,8 @@ var file_proxy_freedom_config_proto_goTypes = []any{
 	(net.Network)(0),                // 8: xray.common.net.Network
 	(*net.PortList)(nil),            // 9: xray.common.net.PortList
 	(*geodata.IPRule)(nil),          // 10: xray.common.geodata.IPRule
-	(internet.DomainStrategy)(0),    // 11: xray.transport.internet.DomainStrategy
+	(log.Severity)(0),               // 11: xray.common.log.Severity
+	(internet.DomainStrategy)(0),    // 12: xray.transport.internet.DomainStrategy
 }
 var file_proxy_freedom_config_proto_depIdxs = []int32{
 	7,  // 0: xray.proxy.freedom.DestinationOverride.server:type_name -> xray.common.protocol.ServerEndpoint
@@ -607,17 +619,18 @@ var file_proxy_freedom_config_proto_depIdxs = []int32{
 	8,  // 2: xray.proxy.freedom.FinalRuleConfig.networks:type_name -> xray.common.net.Network
 	9,  // 3: xray.proxy.freedom.FinalRuleConfig.port_list:type_name -> xray.common.net.PortList
 	10, // 4: xray.proxy.freedom.FinalRuleConfig.ip:type_name -> xray.common.geodata.IPRule
-	4,  // 5: xray.proxy.freedom.FinalRuleConfig.block_delay:type_name -> xray.proxy.freedom.Range
+	4,  // 5: xray.proxy.freedom.FinalRuleConfig.delay:type_name -> xray.proxy.freedom.Range
-	11, // 6: xray.proxy.freedom.Config.domain_strategy:type_name -> xray.transport.internet.DomainStrategy
+	11, // 6: xray.proxy.freedom.FinalRuleConfig.log_level:type_name -> xray.common.log.Severity
-	1,  // 7: xray.proxy.freedom.Config.destination_override:type_name -> xray.proxy.freedom.DestinationOverride
+	12, // 7: xray.proxy.freedom.Config.domain_strategy:type_name -> xray.transport.internet.DomainStrategy
-	2,  // 8: xray.proxy.freedom.Config.fragment:type_name -> xray.proxy.freedom.Fragment
+	1,  // 8: xray.proxy.freedom.Config.destination_override:type_name -> xray.proxy.freedom.DestinationOverride
-	3,  // 9: xray.proxy.freedom.Config.noises:type_name -> xray.proxy.freedom.Noise
+	2,  // 9: xray.proxy.freedom.Config.fragment:type_name -> xray.proxy.freedom.Fragment
-	5,  // 10: xray.proxy.freedom.Config.final_rules:type_name -> xray.proxy.freedom.FinalRuleConfig
+	3,  // 10: xray.proxy.freedom.Config.noises:type_name -> xray.proxy.freedom.Noise
-	11, // [11:11] is the sub-list for method output_type
+	5,  // 11: xray.proxy.freedom.Config.final_rules:type_name -> xray.proxy.freedom.FinalRuleConfig
-	11, // [11:11] is the sub-list for method input_type
+	12, // [12:12] is the sub-list for method output_type
-	11, // [11:11] is the sub-list for extension type_name
+	12, // [12:12] is the sub-list for method input_type
-	11, // [11:11] is the sub-list for extension extendee
+	12, // [12:12] is the sub-list for extension type_name
-	0,  // [0:11] is the sub-list for field type_name
+	12, // [12:12] is the sub-list for extension extendee
+	0,  // [0:12] is the sub-list for field type_name
 }
 
 func init() { file_proxy_freedom_config_proto_init() }
@@ -625,6 +638,7 @@ func file_proxy_freedom_config_proto_init() {
 	if File_proxy_freedom_config_proto != nil {
 		return
 	}
+	file_proxy_freedom_config_proto_msgTypes[4].OneofWrappers = []any{}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
 		File: protoimpl.DescBuilder{

proxy/freedom/config.proto

@@ -11,6 +11,7 @@ import "transport/internet/config.proto";
 import "common/net/port.proto";
 import "common/net/network.proto";
 import "common/geodata/geodat.proto";
+import "common/log/log.proto";
 
 message DestinationOverride {
   xray.common.protocol.ServerEndpoint server = 1;
@@ -51,7 +52,8 @@ message FinalRuleConfig {
   repeated xray.common.net.Network networks = 2;
   xray.common.net.PortList port_list = 3;
   repeated xray.common.geodata.IPRule ip = 4;
-  Range block_delay = 5;
+  Range delay = 5;
+  optional xray.common.log.Severity log_level = 6;
 }
 
 message Config {

proxy/freedom/freedom.go

@@ -15,6 +15,7 @@ import (
 	"github.com/xtls/xray-core/common/dice"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/geodata"
+	"github.com/xtls/xray-core/common/log"
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/platform"
 	"github.com/xtls/xray-core/common/retry"
@@ -75,11 +76,13 @@ func init() {
 		action:   RuleAction_Block,
 		network:  allNetworks,
 		ip:       geodata.GetPrivateIPMatcher(),
+		logLevel: log.Severity_Warning.Enum(),
 	}
 
 	defaultBlockAllRule = &FinalRule{
 		action:   RuleAction_Block,
 		network:  allNetworks,
+		logLevel: log.Severity_Warning.Enum(),
 	}
 }
 
@@ -88,7 +91,8 @@ type FinalRule struct {
 	network  [8]bool
 	port     net.MemoryPortList
 	ip       geodata.IPMatcher
-	blockDelay *Range
+	delay    *Range
+	logLevel *log.Severity
 }
 
 // Handler handles Freedom connections.
@@ -103,7 +107,8 @@ type Handler struct {
 func buildFinalRule(config *FinalRuleConfig) (*FinalRule, error) {
 	rule := &FinalRule{
 		action:   config.GetAction(),
-		blockDelay: config.GetBlockDelay(),
+		delay:    config.GetDelay(),
+		logLevel: config.LogLevel,
 	}
 
 	if len(config.Networks) == 0 {
@@ -164,7 +169,7 @@ func getDefaultFinalRule(inbound *session.Inbound) *FinalRule {
 	switch inbound.Name {
 	case "vless-reverse":
 		return defaultBlockAllRule
-	case "vless", "vmess", "trojan", "hysteria", "wireguard":
+	case "vless", "vmess", "trojan", "hysteria", "wireguard", "masque":
 		return defaultBlockPrivateRule
 	default:
 		if strings.HasPrefix(inbound.Name, "shadowsocks") {
@@ -212,12 +217,12 @@ func (h *Handler) policy() policy.Session {
 	return p
 }
 
-func (h *Handler) blockDelay(rule *FinalRule) time.Duration {
+func (r *FinalRule) blockDuration() time.Duration {
 	min := uint64(30)
 	max := uint64(90)
-	if rule.blockDelay != nil {
+	if r.delay != nil {
-		min = rule.blockDelay.Min
+		min = r.delay.Min
-		max = rule.blockDelay.Max
+		max = r.delay.Max
 	}
 	span := max - min
 	if max < min {
@@ -226,9 +231,26 @@ func (h *Handler) blockDelay(rule *FinalRule) time.Duration {
 	return time.Duration(min+uint64(dice.Roll(int(span+1)))) * time.Second
 }
 
+func (r *FinalRule) log(ctx context.Context, msg ...interface{}) {
+	level := log.Severity_Info
+	if r.logLevel != nil {
+		level = *r.logLevel
+	}
+	switch level {
+	case log.Severity_Debug:
+		errors.LogDebug(ctx, msg...)
+	case log.Severity_Info:
+		errors.LogInfo(ctx, msg...)
+	case log.Severity_Warning:
+		errors.LogWarning(ctx, msg...)
+	case log.Severity_Error:
+		errors.LogError(ctx, msg...)
+	}
+}
+
 func (h *Handler) blackhole(ctx context.Context, input buf.Reader, output buf.Writer, rule *FinalRule, dest *net.Destination) error {
-	delay := h.blockDelay(rule)
+	delay := rule.blockDuration()
-	errors.LogInfo(ctx, "blocked target: ", *dest, ", blackholing connection for ", delay)
+	rule.log(ctx, "target blocked by a finalrule: ", *dest, ", blackholing connection for ", delay)
 	defer common.Close(output)
 	done := make(chan struct{})
 	go func() { // a DispatchLink inbound's reader ignores Interrupt, so don't wait for this copy
@@ -240,7 +262,7 @@ func (h *Handler) blackhole(ctx context.Context, input buf.Reader, output buf.Wr
 	case <-time.After(delay):
 		common.Interrupt(input)
 		common.Interrupt(output)
-		errors.LogInfo(ctx, "closed blackholed connection to blocked target: ", *dest)
+		rule.log(ctx, "closed blackholed connection to blocked target: ", *dest)
 	}
 	return nil
 }

proxy/tun/tun_windows.go

@@ -201,6 +201,12 @@ startOver:
 		}
 		err = t.luid.SetDNS(family, dns, nil)
 		if err != nil {
+			// Skip IPv6 the config does not ask for also when setting its DNS
+			// servers fails, as reported on Windows 11 24H2 with IPv6 disabled
+			// (Access is denied).
+			if family == windows.AF_INET6 && !address6 && !route6 {
+				continue
+			}
 			firstErr = errors.New("unable to set DNS").Base(err)
 			if err == windows.ERROR_NOT_FOUND {
 				goto startOver

proxy/vless/outbound/outbound.go

@@ -254,6 +254,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 		switch request.Command {
 		case protocol.RequestCommandUDP:
 			if !allowUDP443 && request.Port == 443 {
+				proxy.DropUDP(ctx, link.Reader)
 				return errors.New("XTLS rejected UDP/443 traffic")
 			}
 		case protocol.RequestCommandMux:

proxy/wireguard/bind.go

@@ -17,7 +17,7 @@ import (
 
 type bind struct {
 	ctx         context.Context
-	resolveFunc func(host string) (net.IP, error)
+	resolveFunc func(ctx context.Context, host string) (net.IP, error)
 	listenFunc  func(ctx context.Context) (net.PacketConn, error)
 	downFunc    func() error
 	reserved    []byte
@@ -143,7 +143,11 @@ func (b *bind) ParseEndpoint(s string) (conn.Endpoint, error) {
 	if port < 0 || port > 65535 {
 		return nil, errors.New("invalid port " + sport)
 	}
-	ip, err := b.resolveFunc(host)
+	// up sets the connection's context right before it hands over the endpoint
+	b.mu.Lock()
+	ctx := b.ctx
+	b.mu.Unlock()
+	ip, err := b.resolveFunc(ctx, host)
 	if err != nil {
 		return nil, err
 	}

proxy/wireguard/client.go

@@ -323,12 +323,12 @@ func (h *Handler) up(ctx context.Context) error {
 	return h.dev.Up()
 }
 
-func MakeResolveLocal(d dns.Client, streamSettings *internet.MemoryStreamConfig) func(host string) (net.IP, error) {
+func MakeResolveLocal(d dns.Client, streamSettings *internet.MemoryStreamConfig) func(ctx context.Context, host string) (net.IP, error) {
-	return func(host string) (net.IP, error) {
+	return func(ctx context.Context, host string) (net.IP, error) {
 		if ip := net.ParseIP(host); ip != nil {
 			return ip, nil
 		}
-		ips, _, err := d.LookupIP(host, dns.IPOption{IPv4Enable: true, IPv6Enable: true})
+		ips, err := lookupIPContext(ctx, d, host)
 		if err != nil {
 			return nil, err
 		}
@@ -368,6 +368,27 @@ func MakeResolveLocal(d dns.Client, streamSettings *internet.MemoryStreamConfig)
 	}
 }
 
+func lookupIPContext(ctx context.Context, d dns.Client, host string) ([]net.IP, error) {
+	if err := ctx.Err(); err != nil {
+		return nil, err
+	}
+	type result struct {
+		ips []net.IP
+		err error
+	}
+	done := make(chan result, 1)
+	go func() {
+		ips, _, err := d.LookupIP(host, dns.IPOption{IPv4Enable: true, IPv6Enable: true})
+		done <- result{ips, err}
+	}()
+	select {
+	case r := <-done:
+		return r.ips, r.err
+	case <-ctx.Done():
+		return nil, ctx.Err()
+	}
+}
+
 type UDPConnClient struct {
 	net.PacketConn
 	Dest *net.UDPAddr

testing/scenarios/vless_test.go

@@ -661,7 +661,7 @@ func TestVlessRealityFingerprints(t *testing.T) {
 	wg.Wait()
 }
 
-// A blocked connection must be closed after blockDelay even while the client keeps it open and sends nothing.
+// A blocked connection must close after finalRules.delay even while the client keeps it open and sends nothing.
 func TestVlessBlockDelay(t *testing.T) {
 	tcpServer := tcp.Server{
 		MsgProcessor: xor,
@@ -671,7 +671,7 @@ func TestVlessBlockDelay(t *testing.T) {
 	defer tcpServer.Close()
 
 	for _, delay := range []uint64{0, 1} {
-		t.Run(fmt.Sprint("blockDelay=", delay), func(t *testing.T) {
+		t.Run(fmt.Sprint("delay=", delay), func(t *testing.T) {
 			userID := protocol.NewID(uuid.New())
 			serverPort := tcp.PickPort()
 			serverConfig := &core.Config{
@@ -698,7 +698,7 @@ func TestVlessBlockDelay(t *testing.T) {
 							FinalRules: []*freedom.FinalRuleConfig{
 								{
 									Action: freedom.RuleAction_Block,
-									BlockDelay: &freedom.Range{Min: delay, Max: delay},
+									Delay:  &freedom.Range{Min: delay, Max: delay},
 								},
 							},
 						}),
@@ -726,15 +726,15 @@ func TestVlessBlockDelay(t *testing.T) {
 				Port:    dest.Port,
 			}, &encoding.Addons{}))
 
-			blockDelay := time.Duration(delay) * time.Second
+			blockDuration := time.Duration(delay) * time.Second
-			common.Must(conn.SetReadDeadline(time.Now().Add(blockDelay + 5*time.Second)))
+			common.Must(conn.SetReadDeadline(time.Now().Add(blockDuration + 5*time.Second)))
 			_, err = io.Copy(io.Discard, conn)
 			elapsed := time.Since(start)
 			if err, ok := err.(net.Error); ok && err.Timeout() {
 				t.Fatalf("connection is still open after %v", elapsed)
 			}
-			if elapsed < blockDelay {
+			if elapsed < blockDuration {
-				t.Fatalf("connection is closed after %v, before blockDelay", elapsed)
+				t.Fatalf("connection is closed after %v, before finalRules.delay", elapsed)
 			}
 		})
 	}

transport/internet/finalmask/udphop/conn.go

@@ -6,6 +6,7 @@ import (
 	goerrors "errors"
 	"io"
 	mrand "math/rand"
+	stdnet "net"
 	"net/netip"
 	"sync"
 	"time"
@@ -164,7 +165,7 @@ func (c *udpHopConn) recv(conn net.PacketConn) {
 		n, addr, err := conn.ReadFrom(p)
 		if err != nil {
 			pool.Put(p[:cap(p)])
-			if c.closed() {
+			if c.closed() || goerrors.Is(err, stdnet.ErrClosed) {
 				return
 			}
 			var netErr net.Error