refine

README.md

@@ -73,6 +73,7 @@
   - [Xray_bash_onekey](https://github.com/hello-yunshu/Xray_bash_onekey), [XTool](https://github.com/LordPenguin666/XTool), [VPainLess](https://github.com/vpainless/vpainless)
   - [v2ray-agent](https://github.com/mack-a/v2ray-agent), [Xray_onekey](https://github.com/wulabing/Xray_onekey), [ProxySU](https://github.com/proxysu/ProxySU)
 - Magisk
+  - [NetProxy-Magisk](https://github.com/Fanju6/NetProxy-Magisk)
   - [Xray4Magisk](https://github.com/Asterisk4Magisk/Xray4Magisk)
   - [Xray_For_Magisk](https://github.com/E7KMbb/Xray_For_Magisk)
 - Homebrew
@@ -119,6 +120,7 @@
   - [SimpleXray](https://github.com/lhear/SimpleXray)
   - [XrayFA](https://github.com/Q7DF1/XrayFA)
   - [AnyPortal](https://github.com/AnyPortal/AnyPortal)
+  - [NetProxy-Magisk](https://github.com/Fanju6/NetProxy-Magisk)
   - [OneXray](https://github.com/OneXray/OneXray)
 - iOS & macOS arm64 & tvOS
   - [Happ](https://apps.apple.com/app/happ-proxy-utility/id6504287215) | [Happ RU](https://apps.apple.com/ru/app/happ-proxy-utility-plus/id6746188973) | [Happ tvOS](https://apps.apple.com/us/app/happ-proxy-utility-for-tv/id6748297274)

app/proxyman/outbound/handler.go

@@ -267,6 +267,20 @@ func (h *Handler) DestIpAddress() net.IP {
 	return internet.DestIpAddress()
 }
 
+func (h *Handler) SocketSettings() *internet.SocketConfig {
+	if h.streamSettings == nil {
+		return nil
+	}
+	return h.streamSettings.SocketSettings
+}
+
+func (h *Handler) UsesProxySettings() bool {
+	if h.senderSettings != nil && h.senderSettings.ProxySettings.HasTag() {
+		return true
+	}
+	return h.streamSettings != nil && h.streamSettings.SocketSettings != nil && len(h.streamSettings.SocketSettings.DialerProxy) > 0
+}
+
 // Dial implements internet.Dialer.
 func (h *Handler) Dial(ctx context.Context, dest net.Destination) (stat.Connection, error) {
 	if h.senderSettings != nil {

core/core.go

@@ -19,8 +19,8 @@ import (
 
 var (
 	Version_x byte = 26
-	Version_y byte = 5
-	Version_z byte = 3
+	Version_y byte = 4
+	Version_z byte = 25
 )
 
 var (

infra/conf/transport_internet.go

@@ -497,8 +497,8 @@ func (b Bandwidth) Bps() (uint64, error) {
 }
 
 type UdpHop struct {
-	PortList PortList   `json:"ports"`
-	Interval Int32Range `json:"interval"`
+	PortList json.RawMessage `json:"ports"`
+	Interval *Int32Range     `json:"interval"`
 }
 
 type Masquerade struct {
@@ -2142,7 +2142,18 @@ func (c *StreamConfig) Build() (*internet.StreamConfig, error) {
 				return nil, errors.New("unknown congestion control: ", c.FinalMask.QuicParams.Congestion, ", valid values: reno, bbr, brutal, force-brutal")
 			}
 
-			if (c.FinalMask.QuicParams.UdpHop.Interval.From != 0 && c.FinalMask.QuicParams.UdpHop.Interval.From < 5) || (c.FinalMask.QuicParams.UdpHop.Interval.To != 0 && c.FinalMask.QuicParams.UdpHop.Interval.To < 5) {
+			var hop *PortList
+			if err := json.Unmarshal(c.FinalMask.QuicParams.UdpHop.PortList, &hop); err != nil {
+				hop = &PortList{}
+			}
+
+			var inertvalMin, inertvalMax int64
+			if c.FinalMask.QuicParams.UdpHop.Interval != nil {
+				inertvalMin = int64(c.FinalMask.QuicParams.UdpHop.Interval.From)
+				inertvalMax = int64(c.FinalMask.QuicParams.UdpHop.Interval.To)
+			}
+
+			if (inertvalMin != 0 && inertvalMin < 5) || (inertvalMax != 0 && inertvalMax < 5) {
 				return nil, errors.New("Interval must be at least 5")
 			}
 
@@ -2179,9 +2190,9 @@ func (c *StreamConfig) Build() (*internet.StreamConfig, error) {
 				BrutalUp:   up,
 				BrutalDown: down,
 				UdpHop: &internet.UdpHop{
-					Ports:       c.FinalMask.QuicParams.UdpHop.PortList.Build().Ports(),
-					IntervalMin: int64(c.FinalMask.QuicParams.UdpHop.Interval.From),
-					IntervalMax: int64(c.FinalMask.QuicParams.UdpHop.Interval.To),
+					Ports:       hop.Build().Ports(),
+					IntervalMin: inertvalMin,
+					IntervalMax: inertvalMax,
 				},
 				InitStreamReceiveWindow: c.FinalMask.QuicParams.InitStreamReceiveWindow,
 				MaxStreamReceiveWindow:  c.FinalMask.QuicParams.MaxStreamReceiveWindow,

proxy/freedom/freedom.go

@@ -38,6 +38,14 @@ var defaultBlockAllRule *FinalRule
 func init() {
 	common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
 		h := new(Handler)
+		if handler, ok := session.FullHandlerFromContext(ctx).(handlerWithSocketSettings); ok {
+			if sockopt := handler.SocketSettings(); sockopt != nil {
+				h.socketStrategy = sockopt.DomainStrategy
+			}
+		}
+		if handler, ok := session.FullHandlerFromContext(ctx).(handlerWithProxySettings); ok {
+			h.usesProxySettings = handler.UsesProxySettings()
+		}
 		if err := core.RequireFeatures(ctx, func(pm policy.Manager) error {
 			return h.Init(config.(*Config), pm)
 		}); err != nil {
@@ -88,6 +96,14 @@ func init() {
 	}
 }
 
+type handlerWithSocketSettings interface {
+	SocketSettings() *internet.SocketConfig
+}
+
+type handlerWithProxySettings interface {
+	UsesProxySettings() bool
+}
+
 type FinalRule struct {
 	action     RuleAction
 	network    [8]bool
@@ -98,9 +114,11 @@ type FinalRule struct {
 
 // Handler handles Freedom connections.
 type Handler struct {
-	policyManager policy.Manager
-	config        *Config
-	finalRules    []*FinalRule
+	policyManager     policy.Manager
+	config            *Config
+	finalRules        []*FinalRule
+	socketStrategy    internet.DomainStrategy
+	usesProxySettings bool
 }
 
 func buildFinalRule(config *FinalRuleConfig) (*FinalRule, error) {
@@ -177,22 +195,6 @@ func getDefaultFinalRule(inbound *session.Inbound) *FinalRule {
 	return nil
 }
 
-func (h *Handler) shouldResolveDomainBeforeFinalRules(dialDest net.Destination, defaultRule *FinalRule) bool {
-	if !dialDest.Address.Family().IsDomain() {
-		return false
-	}
-	if len(h.finalRules) > 0 {
-		rule := h.finalRules[0]
-		if rule.action == RuleAction_Allow && rule.network[dialDest.Network] && len(rule.port) == 0 && rule.ip == nil {
-			return false
-		}
-	}
-	if defaultRule != nil || len(h.finalRules) > 0 {
-		return true
-	}
-	return false
-}
-
 func (h *Handler) matchFinalRule(network net.Network, address net.Address, port net.Port, defaultRule *FinalRule) *FinalRule {
 	for _, rule := range h.finalRules {
 		if rule.Apply(network, address, port) {
@@ -205,13 +207,6 @@ func (h *Handler) matchFinalRule(network net.Network, address net.Address, port
 	return nil
 }
 
-func (h *Handler) applyFinalRules(network net.Network, address net.Address, port net.Port, defaultRule *FinalRule) RuleAction {
-	if rule := h.matchFinalRule(network, address, port, defaultRule); rule != nil {
-		return rule.action
-	}
-	return RuleAction_Allow
-}
-
 // Init initializes the Handler with necessary parameters.
 func (h *Handler) Init(config *Config, pm policy.Manager) error {
 	h.config = config
@@ -239,11 +234,32 @@ func (h *Handler) blockDelay(rule *FinalRule) time.Duration {
 		min = rule.blockDelay.Min
 		max = rule.blockDelay.Max
 	}
-	abs := max - min
+	span := max - min
 	if max < min {
-		abs = min - max
+		span = min - max
 	}
-	return time.Duration(min+uint64(dice.Roll(int(abs+1)))) * time.Second
+	return time.Duration(min+uint64(dice.Roll(int(span+1)))) * time.Second
+}
+
+func (h *Handler) blackhole(ctx context.Context, input buf.Reader, output buf.Writer, rule *FinalRule, dest *net.Destination) error {
+	delay := h.blockDelay(rule)
+	errors.LogInfo(ctx, "blocked target: ", *dest, ", blackholing connection for ", delay)
+	timer := time.AfterFunc(delay, func() {
+		common.Interrupt(input)
+		common.Interrupt(output)
+		errors.LogInfo(ctx, "closed blackholed connection to blocked target: ", *dest)
+	})
+	defer timer.Stop()
+	defer common.Close(output)
+	_ = buf.Copy(input, buf.Discard)
+	return nil
+}
+
+func (h *Handler) udpDomainStrategy() internet.DomainStrategy {
+	if h.config.DomainStrategy.HasStrategy() {
+		return h.config.DomainStrategy
+	}
+	return h.socketStrategy
 }
 
 func isValidAddress(addr *net.IPOrDomain) bool {
@@ -295,40 +311,73 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 	var blockedRule *FinalRule
 	err := retry.ExponentialBackoff(5, 100).On(func() error {
 		dialDest := destination
-		if h.config.DomainStrategy.HasStrategy() && dialDest.Address.Family().IsDomain() {
-			strategy := h.config.DomainStrategy
-			if destination.Network == net.Network_UDP && origTargetAddr != nil && outGateway == nil {
-				strategy = strategy.GetDynamicStrategy(origTargetAddr.Family())
-			}
-			ips, err := internet.LookupForIP(dialDest.Address.Domain(), strategy, outGateway)
-			if err != nil {
-				errors.LogInfoInner(ctx, err, "failed to get IP address for domain ", dialDest.Address.Domain())
-				if h.config.DomainStrategy.ForceIP() {
-					return err
+
+		if dialDest.Address.Family().IsDomain() {
+			if strategy := h.config.DomainStrategy; strategy.HasStrategy() {
+				if destination.Network == net.Network_UDP && origTargetAddr != nil && outGateway == nil {
+					strategy = strategy.GetDynamicStrategy(origTargetAddr.Family())
 				}
-			} else {
-				dialDest = net.Destination{
-					Network: dialDest.Network,
-					Address: net.IPAddress(ips[dice.Roll(len(ips))]),
-					Port:    dialDest.Port,
-				}
-				errors.LogInfo(ctx, "dialing to ", dialDest)
-			}
-		} else if h.shouldResolveDomainBeforeFinalRules(dialDest, defaultRule) { // asis + domain + hasrules
-			addrs, err := net.DefaultResolver.LookupIPAddr(ctx, dialDest.Address.Domain())
-			if err != nil {
-				errors.LogInfoInner(ctx, err, "failed to get IP address for domain ", dialDest.Address.Domain())
-			} else if len(addrs) > 0 {
-				if addr := net.IPAddress(addrs[dice.Roll(len(addrs))].IP); addr != nil {
-					dialDest.Address = addr
+				ips, err := internet.LookupForIP(dialDest.Address.Domain(), strategy, outGateway)
+				if err != nil { // SRV/TXT
+					errors.LogInfoInner(ctx, err, "failed to get IP address for domain ", dialDest.Address.Domain())
+					if h.config.DomainStrategy.ForceIP() || defaultRule != nil || len(h.finalRules) > 0 {
+						return err // retry
+					}
+				} else { // to ip
+					dialDest = net.Destination{
+						Network: dialDest.Network,
+						Address: net.IPAddress(ips[dice.Roll(len(ips))]),
+						Port:    dialDest.Port,
+					}
 					errors.LogInfo(ctx, "dialing to ", dialDest)
+					if rule := h.matchFinalRule(dialDest.Network, dialDest.Address, dialDest.Port, defaultRule); rule != nil && rule.action == RuleAction_Block {
+						blockedDest = &dialDest
+						blockedRule = rule
+						return nil
+					}
+				}
+			} else if defaultRule != nil || len(h.finalRules) > 0 { // freedom asis + hasrules
+				if strategy := h.socketStrategy; strategy.HasStrategy() {
+					ips, err := internet.LookupForIP(dialDest.Address.Domain(), strategy, outGateway)
+					if err != nil { // SRV/TXT
+						errors.LogInfoInner(ctx, err, "failed to get IP address for domain ", dialDest.Address.Domain())
+						if strategy.ForceIP() {
+							return err // retry
+						}
+					}
+					for _, ip := range ips {
+						if addr := net.IPAddress(ip); addr != nil {
+							if rule := h.matchFinalRule(dialDest.Network, addr, dialDest.Port, defaultRule); rule != nil && rule.action == RuleAction_Block {
+								blockedDest = &dialDest
+								blockedDest.Address = addr
+								blockedRule = rule
+								return nil
+							}
+						}
+					}
+				} else { // sockopt asis
+					addrs, err := net.DefaultResolver.LookupIPAddr(ctx, dialDest.Address.Domain())
+					if err != nil { // SRV/TXT
+						errors.LogInfoInner(ctx, err, "failed to get IP address for domain ", dialDest.Address.Domain())
+					}
+					for _, addr := range addrs {
+						if ipAddr := net.IPAddress(addr.IP); ipAddr != nil {
+							if rule := h.matchFinalRule(dialDest.Network, ipAddr, dialDest.Port, defaultRule); rule != nil && rule.action == RuleAction_Block {
+								blockedDest = &dialDest
+								blockedDest.Address = ipAddr
+								blockedRule = rule
+								return nil
+							}
+						}
+					}
 				}
 			}
-		}
-		if rule := h.matchFinalRule(dialDest.Network, dialDest.Address, dialDest.Port, defaultRule); rule != nil && rule.action == RuleAction_Block {
-			blockedDest = &dialDest
-			blockedRule = rule
-			return nil
+		} else {
+			if rule := h.matchFinalRule(dialDest.Network, dialDest.Address, dialDest.Port, defaultRule); rule != nil && rule.action == RuleAction_Block {
+				blockedDest = &dialDest
+				blockedRule = rule
+				return nil
+			}
 		}
 
 		rawConn, err := dialer.Dial(ctx, dialDest)
@@ -343,25 +392,21 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 		return errors.New("failed to open connection to ", destination).Base(err)
 	}
 	if blockedDest != nil {
-		delay := h.blockDelay(blockedRule)
-		errors.LogInfo(ctx, "blocked target: ", *blockedDest, ", blackholing connection for ", delay)
-		timer := time.AfterFunc(delay, func() {
-			common.Interrupt(input)
-			common.Interrupt(output)
-			errors.LogInfo(ctx, "closed blackholed connection to blocked target: ", *blockedDest)
-		})
-		defer timer.Stop()
-		defer common.Close(output)
-		if err := buf.Copy(input, buf.Discard); err != nil {
-			return nil
-		}
-		return nil
+		return h.blackhole(ctx, input, output, blockedRule, blockedDest)
 	}
-	// TODO: SRV/TXT
-	// if remoteDest := net.DestinationFromAddr(conn.RemoteAddr()); h.applyFinalRules(remoteDest.Network, remoteDest.Address, remoteDest.Port, defaultRule) == RuleAction_Block {
-	// 	conn.Close()
-	// 	return blackhole(remoteDest)
-	// }
+	if defaultRule != nil || len(h.finalRules) > 0 {
+		if h.usesProxySettings {
+			errors.LogInfo(ctx, "skipping final rule check for proxied remote endpoint, original target: ", destination)
+		} else {
+			// SRV/TXT, lookup failed
+			remoteDest := net.DestinationFromAddr(conn.RemoteAddr())
+			if rule := h.matchFinalRule(remoteDest.Network, remoteDest.Address, remoteDest.Port, defaultRule); rule != nil && rule.action == RuleAction_Block {
+				conn.Close()
+				return h.blackhole(ctx, input, output, rule, &remoteDest)
+			}
+		}
+	}
+
 	if h.config.ProxyProtocol > 0 && h.config.ProxyProtocol <= 2 {
 		version := byte(h.config.ProxyProtocol)
 		srcAddr := inbound.Source.RawNetAddr()
@@ -406,7 +451,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 				writer = buf.NewWriter(conn)
 			}
 		} else {
-			writer = NewPacketWriter(conn, h, defaultRule, UDPOverride, destination)
+			writer = NewPacketWriter(conn, h, defaultRule, UDPOverride, destination, outGateway)
 			if h.config.Noises != nil {
 				errors.LogDebug(ctx, "NOISE", h.config.Noises)
 				writer = &NoisePacketWriter{
@@ -510,7 +555,7 @@ func (r *PacketReader) ReadMultiBuffer() (buf.MultiBuffer, error) {
 		}
 		udpAddr := d.(*net.UDPAddr)
 		sourceAddr := net.IPAddress(udpAddr.IP)
-		if r.Handler.applyFinalRules(net.Network_UDP, sourceAddr, net.Port(udpAddr.Port), r.DefaultRule) == RuleAction_Block {
+		if rule := r.Handler.matchFinalRule(net.Network_UDP, sourceAddr, net.Port(udpAddr.Port), r.DefaultRule); rule != nil && rule.action == RuleAction_Block {
 			continue
 		}
 		b.Resize(0, int32(n))
@@ -535,7 +580,7 @@ func (r *PacketReader) ReadMultiBuffer() (buf.MultiBuffer, error) {
 }
 
 // DialDest means the dial target used in the dialer when creating conn
-func NewPacketWriter(conn net.Conn, h *Handler, defaultRule *FinalRule, UDPOverride net.Destination, DialDest net.Destination) buf.Writer {
+func NewPacketWriter(conn net.Conn, h *Handler, defaultRule *FinalRule, UDPOverride net.Destination, DialDest net.Destination, outGateway net.Address) buf.Writer {
 	iConn := conn
 	statConn, ok := iConn.(*stat.CounterConnection)
 	if ok {
@@ -559,7 +604,7 @@ func NewPacketWriter(conn net.Conn, h *Handler, defaultRule *FinalRule, UDPOverr
 			DefaultRule:       defaultRule,
 			UDPOverride:       UDPOverride,
 			ResolvedUDPAddr:   resolvedUDPAddr,
-			LocalAddr:         net.DestinationFromAddr(conn.LocalAddr()).Address,
+			OutGateway:        outGateway,
 		}
 
 	}
@@ -578,7 +623,7 @@ type PacketWriter struct {
 	// Resulting in these packets being sent to many different IPs randomly
 	// So, cache and keep the resolve result
 	ResolvedUDPAddr *utils.TypedSyncMap[string, net.Address]
-	LocalAddr       net.Address
+	OutGateway      net.Address
 }
 
 func (w *PacketWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
@@ -601,21 +646,21 @@ func (w *PacketWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
 				if ip, ok := w.ResolvedUDPAddr.Load(b.UDP.Address.Domain()); ok {
 					b.UDP.Address = ip
 				} else {
-					ShouldUseSystemResolver := true
-					if w.Handler.config.DomainStrategy.HasStrategy() {
-						ips, err := internet.LookupForIP(b.UDP.Address.Domain(), w.Handler.config.DomainStrategy, w.LocalAddr)
+					shouldUseSystemResolver := true
+					if resolveStrategy := w.Handler.udpDomainStrategy(); resolveStrategy.HasStrategy() {
+						ips, err := internet.LookupForIP(b.UDP.Address.Domain(), resolveStrategy, w.OutGateway)
 						if err != nil {
 							// drop packet if resolve failed when forceIP
-							if w.Handler.config.DomainStrategy.ForceIP() {
+							if resolveStrategy.ForceIP() {
 								b.Release()
 								continue
 							}
 						} else {
 							ip = net.IPAddress(ips[dice.Roll(len(ips))])
-							ShouldUseSystemResolver = false
+							shouldUseSystemResolver = false
 						}
 					}
-					if ShouldUseSystemResolver {
+					if shouldUseSystemResolver {
 						udpAddr, err := net.ResolveUDPAddr("udp", b.UDP.NetAddr())
 						if err != nil {
 							b.Release()
@@ -629,7 +674,7 @@ func (w *PacketWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
 					}
 				}
 			}
-			if w.applyFinalRules(net.Network_UDP, b.UDP.Address, b.UDP.Port, w.DefaultRule) == RuleAction_Block {
+			if rule := w.matchFinalRule(net.Network_UDP, b.UDP.Address, b.UDP.Port, w.DefaultRule); rule != nil && rule.action == RuleAction_Block {
 				b.Release()
 				continue
 			}

transport/internet/config.go

@@ -12,7 +12,7 @@ var (
 	globalTransportConfigCreatorCache = make(map[string]ConfigCreator)
 )
 
-var strategy = [][]byte{
+var strategy = [11][3]byte{
 	//              name        strategy,   prefer, fallback
 	{0, 0, 0}, //   AsIs        none,       /,      /
 	{1, 0, 0}, //   UseIP       use,        both,   none
@@ -27,8 +27,6 @@ var strategy = [][]byte{
 	{2, 6, 4}, //   ForceIPv6v4 force,      6,      4
 }
 
-const unknownProtocol = "unknown"
-
 func RegisterProtocolConfigCreator(name string, creator ConfigCreator) error {
 	if _, found := globalTransportConfigCreatorCache[name]; found {
 		return errors.New("protocol ", name, " is already registered").AtError()

transport/internet/config.pb.go

@@ -730,6 +730,8 @@ type SocketConfig struct {
 	// ReceiveOriginalDestAddress is for enabling IP_RECVORIGDSTADDR socket
 	// option. This option is for UDP only.
 	ReceiveOriginalDestAddress bool                 `protobuf:"varint,4,opt,name=receive_original_dest_address,json=receiveOriginalDestAddress,proto3" json:"receive_original_dest_address,omitempty"`
+	BindAddress                []byte               `protobuf:"bytes,5,opt,name=bind_address,json=bindAddress,proto3" json:"bind_address,omitempty"`
+	BindPort                   uint32               `protobuf:"varint,6,opt,name=bind_port,json=bindPort,proto3" json:"bind_port,omitempty"`
 	AcceptProxyProtocol        bool                 `protobuf:"varint,7,opt,name=accept_proxy_protocol,json=acceptProxyProtocol,proto3" json:"accept_proxy_protocol,omitempty"`
 	DomainStrategy             DomainStrategy       `protobuf:"varint,8,opt,name=domain_strategy,json=domainStrategy,proto3,enum=xray.transport.internet.DomainStrategy" json:"domain_strategy,omitempty"`
 	DialerProxy                string               `protobuf:"bytes,9,opt,name=dialer_proxy,json=dialerProxy,proto3" json:"dialer_proxy,omitempty"`
@@ -809,6 +811,20 @@ func (x *SocketConfig) GetReceiveOriginalDestAddress() bool {
 	return false
 }
 
+func (x *SocketConfig) GetBindAddress() []byte {
+	if x != nil {
+		return x.BindAddress
+	}
+	return nil
+}
+
+func (x *SocketConfig) GetBindPort() uint32 {
+	if x != nil {
+		return x.BindPort
+	}
+	return 0
+}
+
 func (x *SocketConfig) GetAcceptProxyProtocol() bool {
 	if x != nil {
 		return x.AcceptProxyProtocol
@@ -1050,12 +1066,14 @@ const file_transport_internet_config_proto_rawDesc = "" +
 	"\x05level\x18\x03 \x01(\tR\x05level\x12\x10\n" +
 	"\x03opt\x18\x04 \x01(\tR\x03opt\x12\x14\n" +
 	"\x05value\x18\x05 \x01(\tR\x05value\x12\x12\n" +
-	"\x04type\x18\x06 \x01(\tR\x04type\"\xc9\b\n" +
+	"\x04type\x18\x06 \x01(\tR\x04type\"\x89\t\n" +
 	"\fSocketConfig\x12\x12\n" +
 	"\x04mark\x18\x01 \x01(\x05R\x04mark\x12\x10\n" +
 	"\x03tfo\x18\x02 \x01(\x05R\x03tfo\x12H\n" +
 	"\x06tproxy\x18\x03 \x01(\x0e20.xray.transport.internet.SocketConfig.TProxyModeR\x06tproxy\x12A\n" +
-	"\x1dreceive_original_dest_address\x18\x04 \x01(\bR\x1areceiveOriginalDestAddress\x122\n" +
+	"\x1dreceive_original_dest_address\x18\x04 \x01(\bR\x1areceiveOriginalDestAddress\x12!\n" +
+	"\fbind_address\x18\x05 \x01(\fR\vbindAddress\x12\x1b\n" +
+	"\tbind_port\x18\x06 \x01(\rR\bbindPort\x122\n" +
 	"\x15accept_proxy_protocol\x18\a \x01(\bR\x13acceptProxyProtocol\x12P\n" +
 	"\x0fdomain_strategy\x18\b \x01(\x0e2'.xray.transport.internet.DomainStrategyR\x0edomainStrategy\x12!\n" +
 	"\fdialer_proxy\x18\t \x01(\tR\vdialerProxy\x125\n" +

transport/internet/config.proto

@@ -124,6 +124,10 @@ message SocketConfig {
   // option. This option is for UDP only.
   bool receive_original_dest_address = 4;
 
+  bytes bind_address = 5;
+
+  uint32 bind_port = 6;
+
   bool accept_proxy_protocol = 7;
 
   DomainStrategy domain_strategy = 8;

transport/internet/hysteria/dialer.go

@@ -3,7 +3,6 @@ package hysteria
 import (
 	"context"
 	go_tls "crypto/tls"
-	"math/rand"
 	"net/http"
 	"net/url"
 	"reflect"
@@ -65,7 +64,7 @@ func (c *client) close() {
 	c.udpSM = nil
 }
 
-func (c *client) dial(ctx context.Context) error {
+func (c *client) dial() error {
 	status := c.status()
 	if status == StatusActive {
 		return nil
@@ -114,54 +113,30 @@ func (c *client) dial(ctx context.Context) error {
 	// 	quicConfig.KeepAlivePeriod = 10 * time.Second
 	// }
 
-	udpHopDialer := func(addr *net.UDPAddr) (net.PacketConn, error) {
-		conn, err := internet.DialSystem(ctx, net.UDPDestination(net.IPAddress(addr.IP), net.Port(addr.Port)), c.socketConfig)
-		if err != nil {
-			errors.LogInfoInner(context.Background(), err, "skip hop: failed to dial to dest")
-			return nil, errors.New("")
-		}
-
-		var pktConn net.PacketConn
-
-		switch c := conn.(type) {
-		case *internet.PacketConnWrapper:
-			pktConn = c.PacketConn
-		default:
-			panic(reflect.TypeOf(c))
-		}
-
-		return pktConn, nil
-	}
-
 	var pktConn net.PacketConn
 	var udpAddr *net.UDPAddr
+	var err error
+	udpAddr, err = net.ResolveUDPAddr("udp", c.dest.NetAddr())
+	if err != nil {
+		return err
+	}
 	if len(quicParams.UdpHop.Ports) > 0 {
-		index := rand.Intn(len(quicParams.UdpHop.Ports))
-		c.dest.Port = net.Port(quicParams.UdpHop.Ports[index])
-		conn, err := internet.DialSystem(ctx, c.dest, c.socketConfig)
+		pktConn, err = udphop.NewUDPHopPacketConn(udphop.ToAddrs(udpAddr.IP, quicParams.UdpHop.Ports), time.Duration(quicParams.UdpHop.IntervalMin)*time.Second, time.Duration(quicParams.UdpHop.IntervalMax)*time.Second, c.udpHopDialer)
 		if err != nil {
-			return errors.New("failed to dial to dest").Base(err)
+			return err
 		}
-		switch c := conn.(type) {
-		case *internet.PacketConnWrapper:
-			pktConn = c.PacketConn
-			udpAddr = conn.RemoteAddr().(*net.UDPAddr)
-		default:
-			panic(reflect.TypeOf(c))
-		}
-		pktConn = udphop.NewUDPHopPacketConn(udphop.ToAddrs(udpAddr.IP, quicParams.UdpHop.Ports), time.Duration(quicParams.UdpHop.IntervalMin)*time.Second, time.Duration(quicParams.UdpHop.IntervalMax)*time.Second, udpHopDialer, pktConn, index)
 	} else {
-		conn, err := internet.DialSystem(ctx, c.dest, c.socketConfig)
+		conn, err := internet.DialSystem(context.Background(), c.dest, c.socketConfig)
 		if err != nil {
-			return errors.New("failed to dial to dest").Base(err)
+			return err
 		}
 		switch c := conn.(type) {
 		case *internet.PacketConnWrapper:
 			pktConn = c.PacketConn
-			udpAddr = c.RemoteAddr().(*net.UDPAddr)
+		case *net.UDPConn:
+			pktConn = c
 		case *cnc.Connection:
 			pktConn = &internet.FakePacketConn{Conn: c}
-			udpAddr = &net.UDPAddr{IP: c.RemoteAddr().(*net.TCPAddr).IP, Port: c.RemoteAddr().(*net.TCPAddr).Port}
 		default:
 			panic(reflect.TypeOf(c))
 		}
@@ -253,11 +228,11 @@ func (c *client) dial(ctx context.Context) error {
 	return nil
 }
 
-func (c *client) tcp(ctx context.Context) (stat.Connection, error) {
+func (c *client) tcp() (stat.Connection, error) {
 	c.Lock()
 	defer c.Unlock()
 
-	err := c.dial(ctx)
+	err := c.dial()
 	if err != nil {
 		return nil, err
 	}
@@ -276,11 +251,11 @@ func (c *client) tcp(ctx context.Context) (stat.Connection, error) {
 	}, nil
 }
 
-func (c *client) udp(ctx context.Context) (stat.Connection, error) {
+func (c *client) udp() (stat.Connection, error) {
 	c.Lock()
 	defer c.Unlock()
 
-	err := c.dial(ctx)
+	err := c.dial()
 	if err != nil {
 		return nil, err
 	}
@@ -296,6 +271,29 @@ func (c *client) clean() {
 	c.Unlock()
 }
 
+func (c *client) udpHopDialer(addr *net.UDPAddr) (net.PacketConn, error) {
+	conn, err := internet.DialSystem(context.Background(), net.UDPDestination(net.IPAddress(addr.IP), net.Port(addr.Port)), c.socketConfig)
+	if err != nil {
+		errors.LogInfoInner(context.Background(), err, "skip hop: failed to dial to dest")
+		return nil, errors.New("failed to dial to dest").Base(err)
+	}
+
+	var pktConn net.PacketConn
+
+	switch c := conn.(type) {
+	case *internet.PacketConnWrapper:
+		pktConn = c.PacketConn
+	case *net.UDPConn:
+		pktConn = c
+	default:
+		errors.LogInfo(context.Background(), "skip hop: invalid conn ", reflect.TypeOf(c))
+		conn.Close()
+		return nil, errors.New("invalid conn ", reflect.TypeOf(c))
+	}
+
+	return pktConn, nil
+}
+
 type dialerConf struct {
 	net.Destination
 	*internet.MemoryStreamConfig
@@ -358,9 +356,9 @@ func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.Me
 	}
 
 	if datagram {
-		return c.udp(ctx)
+		return c.udp()
 	}
-	return c.tcp(ctx)
+	return c.tcp()
 }
 
 func init() {

transport/internet/hysteria/udphop/conn.go

@@ -47,7 +47,7 @@ type udpPacket struct {
 	Err  error
 }
 
-func NewUDPHopPacketConn(addrs []net.Addr, hopIntervalMin time.Duration, hopIntervalMax time.Duration, listenUDPFunc func(addr *net.UDPAddr) (net.PacketConn, error), currentConn net.PacketConn, addrIndex int) net.PacketConn {
+func NewUDPHopPacketConn(addrs []net.Addr, hopIntervalMin time.Duration, hopIntervalMax time.Duration, listenUDPFunc func(addr *net.UDPAddr) (net.PacketConn, error)) (net.PacketConn, error) {
 	if len(addrs) == 0 {
 		panic("len(addrs) == 0")
 	}
@@ -75,8 +75,8 @@ func NewUDPHopPacketConn(addrs []net.Addr, hopIntervalMin time.Duration, hopInte
 		HopIntervalMax: hopIntervalMax,
 		ListenUDPFunc:  listenUDPFunc,
 		prevConn:       nil,
-		currentConn:    currentConn,
-		addrIndex:      addrIndex,
+		currentConn:    nil,
+		addrIndex:      rand.Intn(len(addrs)),
 		recvQueue:      make(chan *udpPacket, packetQueueSize),
 		closeChan:      make(chan struct{}),
 		bufPool: sync.Pool{
@@ -85,9 +85,14 @@ func NewUDPHopPacketConn(addrs []net.Addr, hopIntervalMin time.Duration, hopInte
 			},
 		},
 	}
+	var err error
+	hConn.currentConn, err = listenUDPFunc(hConn.Addrs[hConn.addrIndex].(*net.UDPAddr))
+	if err != nil {
+		return nil, err
+	}
 	go hConn.recvLoop(hConn.currentConn)
 	go hConn.hopLoop()
-	return hConn
+	return hConn, nil
 }
 
 func (u *UdpHopPacketConn) recvLoop(conn net.PacketConn) {

transport/internet/kcp/dialer.go

@@ -58,14 +58,14 @@ func DialKCP(ctx context.Context, dest net.Destination, streamSettings *internet
 
 	if streamSettings.UdpmaskManager != nil {
 		var pktConn net.PacketConn
-		var udpAddr *net.UDPAddr
+		var udpAddr = conn.RemoteAddr().(*net.UDPAddr)
 		switch c := conn.(type) {
 		case *internet.PacketConnWrapper:
 			pktConn = c.PacketConn
-			udpAddr = c.RemoteAddr().(*net.UDPAddr)
+		case *net.UDPConn:
+			pktConn = c
 		case *cnc.Connection:
 			pktConn = &internet.FakePacketConn{Conn: c}
-			udpAddr = &net.UDPAddr{IP: c.RemoteAddr().(*net.TCPAddr).IP, Port: c.RemoteAddr().(*net.TCPAddr).Port}
 		default:
 			panic(reflect.TypeOf(c))
 		}

transport/internet/sockopt_darwin.go

@@ -288,6 +288,32 @@ func applyInboundSocketOptions(network string, fd uintptr, config *SocketConfig)
 	return nil
 }
 
+func bindAddr(fd uintptr, address []byte, port uint32) error {
+	setReuseAddr(fd)
+	setReusePort(fd)
+
+	var sockaddr unix.Sockaddr
+
+	switch len(address) {
+	case net.IPv4len:
+		a4 := &unix.SockaddrInet4{
+			Port: int(port),
+		}
+		copy(a4.Addr[:], address)
+		sockaddr = a4
+	case net.IPv6len:
+		a6 := &unix.SockaddrInet6{
+			Port: int(port),
+		}
+		copy(a6.Addr[:], address)
+		sockaddr = a6
+	default:
+		return errors.New("unexpected length of ip")
+	}
+
+	return unix.Bind(int(fd), sockaddr)
+}
+
 func setReuseAddr(fd uintptr) error {
 	if err := unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_REUSEADDR, 1); err != nil {
 		return errors.New("failed to set SO_REUSEADDR").Base(err).AtWarning()

transport/internet/sockopt_freebsd.go

@@ -222,6 +222,32 @@ func applyInboundSocketOptions(network string, fd uintptr, config *SocketConfig)
 	return nil
 }
 
+func bindAddr(fd uintptr, ip []byte, port uint32) error {
+	setReuseAddr(fd)
+	setReusePort(fd)
+
+	var sockaddr syscall.Sockaddr
+
+	switch len(ip) {
+	case net.IPv4len:
+		a4 := &syscall.SockaddrInet4{
+			Port: int(port),
+		}
+		copy(a4.Addr[:], ip)
+		sockaddr = a4
+	case net.IPv6len:
+		a6 := &syscall.SockaddrInet6{
+			Port: int(port),
+		}
+		copy(a6.Addr[:], ip)
+		sockaddr = a6
+	default:
+		return errors.New("unexpected length of ip")
+	}
+
+	return syscall.Bind(int(fd), sockaddr)
+}
+
 func setReuseAddr(fd uintptr) error {
 	if err := syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1); err != nil {
 		return errors.New("failed to set SO_REUSEADDR").Base(err).AtWarning()

transport/internet/sockopt_linux.go

@@ -2,6 +2,7 @@ package internet
 
 import (
 	"context"
+	"net"
 	"runtime"
 	"strconv"
 	"strings"
@@ -11,6 +12,32 @@ import (
 	"golang.org/x/sys/unix"
 )
 
+func bindAddr(fd uintptr, ip []byte, port uint32) error {
+	setReuseAddr(fd)
+	setReusePort(fd)
+
+	var sockaddr syscall.Sockaddr
+
+	switch len(ip) {
+	case net.IPv4len:
+		a4 := &syscall.SockaddrInet4{
+			Port: int(port),
+		}
+		copy(a4.Addr[:], ip)
+		sockaddr = a4
+	case net.IPv6len:
+		a6 := &syscall.SockaddrInet6{
+			Port: int(port),
+		}
+		copy(a6.Addr[:], ip)
+		sockaddr = a6
+	default:
+		return errors.New("unexpected length of ip")
+	}
+
+	return syscall.Bind(int(fd), sockaddr)
+}
+
 // applyOutboundSocketOptions applies socket options for outbound connection.
 // note that unlike other part of Xray, this function needs network with speified network stack(tcp4/tcp6/udp4/udp6)
 func applyOutboundSocketOptions(network string, address string, fd uintptr, config *SocketConfig) error {

transport/internet/sockopt_other.go

@@ -11,6 +11,10 @@ func applyInboundSocketOptions(network string, fd uintptr, config *SocketConfig)
 	return nil
 }
 
+func bindAddr(fd uintptr, ip []byte, port uint32) error {
+	return nil
+}
+
 func setReuseAddr(fd uintptr) error {
 	return nil
 }

transport/internet/sockopt_windows.go

@@ -181,6 +181,10 @@ func applyInboundSocketOptions(network string, fd uintptr, config *SocketConfig)
 	return nil
 }
 
+func bindAddr(fd uintptr, ip []byte, port uint32) error {
+	return nil
+}
+
 func setReuseAddr(fd uintptr) error {
 	return nil
 }

transport/internet/splithttp/dialer.go

@@ -5,7 +5,6 @@ import (
 	gotls "crypto/tls"
 	"fmt"
 	"io"
-	"math/rand"
 	"net/http"
 	"net/http/httptrace"
 	"net/url"
@@ -200,7 +199,7 @@ func createHTTPClient(dest net.Destination, streamSettings *internet.MemoryStrea
 					conn, err := internet.DialSystem(ctx, net.UDPDestination(net.IPAddress(addr.IP), net.Port(addr.Port)), streamSettings.SocketSettings)
 					if err != nil {
 						errors.LogInfoInner(context.Background(), err, "skip hop: failed to dial to dest")
-						return nil, errors.New("")
+						return nil, errors.New("failed to dial to dest").Base(err)
 					}
 
 					var pktConn net.PacketConn
@@ -208,8 +207,12 @@ func createHTTPClient(dest net.Destination, streamSettings *internet.MemoryStrea
 					switch c := conn.(type) {
 					case *internet.PacketConnWrapper:
 						pktConn = c.PacketConn
+					case *net.UDPConn:
+						pktConn = c
 					default:
-						panic(reflect.TypeOf(c))
+						errors.LogInfo(context.Background(), "skip hop: invalid conn ", reflect.TypeOf(c))
+						conn.Close()
+						return nil, errors.New("invalid conn ", reflect.TypeOf(c))
 					}
 
 					return pktConn, nil
@@ -217,33 +220,28 @@ func createHTTPClient(dest net.Destination, streamSettings *internet.MemoryStrea
 
 				var pktConn net.PacketConn
 				var udpAddr *net.UDPAddr
+				var err error
+				udpAddr, err = net.ResolveUDPAddr("udp", dest.NetAddr())
+				if err != nil {
+					return nil, err
+				}
 				if len(quicParams.UdpHop.Ports) > 0 {
-					index := rand.Intn(len(quicParams.UdpHop.Ports))
-					dest.Port = net.Port(quicParams.UdpHop.Ports[index])
-					conn, err := internet.DialSystem(ctx, dest, streamSettings.SocketSettings)
+					pktConn, err = udphop.NewUDPHopPacketConn(udphop.ToAddrs(udpAddr.IP, quicParams.UdpHop.Ports), time.Duration(quicParams.UdpHop.IntervalMin)*time.Second, time.Duration(quicParams.UdpHop.IntervalMax)*time.Second, udpHopDialer)
 					if err != nil {
-						return nil, errors.New("failed to dial to dest").Base(err)
+						return nil, err
 					}
-					switch c := conn.(type) {
-					case *internet.PacketConnWrapper:
-						pktConn = c.PacketConn
-						udpAddr = conn.RemoteAddr().(*net.UDPAddr)
-					default:
-						panic(reflect.TypeOf(c))
-					}
-					pktConn = udphop.NewUDPHopPacketConn(udphop.ToAddrs(udpAddr.IP, quicParams.UdpHop.Ports), time.Duration(quicParams.UdpHop.IntervalMin)*time.Second, time.Duration(quicParams.UdpHop.IntervalMax)*time.Second, udpHopDialer, pktConn, index)
 				} else {
 					conn, err := internet.DialSystem(ctx, dest, streamSettings.SocketSettings)
 					if err != nil {
-						return nil, errors.New("failed to dial to dest").Base(err)
+						return nil, err
 					}
 					switch c := conn.(type) {
 					case *internet.PacketConnWrapper:
 						pktConn = c.PacketConn
-						udpAddr = c.RemoteAddr().(*net.UDPAddr)
+					case *net.UDPConn:
+						pktConn = c
 					case *cnc.Connection:
 						pktConn = &internet.FakePacketConn{Conn: c}
-						udpAddr = &net.UDPAddr{IP: c.RemoteAddr().(*net.TCPAddr).IP, Port: c.RemoteAddr().(*net.TCPAddr).Port}
 					default:
 						panic(reflect.TypeOf(c))
 					}

transport/internet/splithttp/hub.go

@@ -441,7 +441,7 @@ type Listener struct {
 	server     http.Server
 	h3server   *http3.Server
 	listener   net.Listener
-	h3listener http3.QUICListener
+	h3listener Qface
 	config     *Config
 	addConn    internet.ConnHandler
 	isH3       bool
@@ -519,8 +519,8 @@ func ListenXH(ctx context.Context, address net.Address, port net.Port, streamSet
 			return nil, errors.New("failed to listen QUIC for XHTTP/3 on ", address, ":", port).Base(err)
 		}
 		l.h3listener = &QListener{
-			QUICListener: l.h3listener,
-			quicParams:   quicParams,
+			Qface:      l.h3listener,
+			quicParams: quicParams,
 		}
 		errors.LogInfo(ctx, "listening QUIC for XHTTP/3 on ", address, ":", port)
 
@@ -615,13 +615,21 @@ func init() {
 	common.Must(internet.RegisterTransportListener(protocolName, ListenXH))
 }
 
+type Qface interface {
+	Accept(ctx context.Context) (*quic.Conn, error)
+	Addr() net.Addr
+	Close() error
+}
+
+var _ Qface = (*quic.EarlyListener)(nil)
+
 type QListener struct {
-	http3.QUICListener
+	Qface
 	quicParams *internet.QuicParams
 }
 
 func (l *QListener) Accept(ctx context.Context) (*quic.Conn, error) {
-	conn, err := l.QUICListener.Accept(ctx)
+	conn, err := l.Qface.Accept(ctx)
 	if err != nil {
 		return nil, err
 	}

transport/internet/system_dialer.go

@@ -44,10 +44,14 @@ func resolveSrcAddr(network net.Network, src net.Address) net.Addr {
 	}
 }
 
+func hasBindAddr(sockopt *SocketConfig) bool {
+	return sockopt != nil && len(sockopt.BindAddress) > 0 && sockopt.BindPort > 0
+}
+
 func (d *DefaultSystemDialer) Dial(ctx context.Context, src net.Address, dest net.Destination, sockopt *SocketConfig) (net.Conn, error) {
 	errors.LogDebug(ctx, "dialing to "+dest.String())
 
-	if dest.Network == net.Network_UDP {
+	if dest.Network == net.Network_UDP && !hasBindAddr(sockopt) {
 		srcAddr := resolveSrcAddr(net.Network_UDP, src)
 		if srcAddr == nil {
 			srcAddr = &net.UDPAddr{
@@ -128,6 +132,11 @@ func (d *DefaultSystemDialer) Dial(ctx context.Context, src net.Address, dest ne
 					if err := applyOutboundSocketOptions(network, address, fd, sockopt); err != nil {
 						errors.LogInfoInner(ctx, err, "failed to apply socket options")
 					}
+					if dest.Network == net.Network_UDP && hasBindAddr(sockopt) {
+						if err := bindAddr(fd, sockopt.BindAddress, sockopt.BindPort); err != nil {
+							errors.LogInfoInner(ctx, err, "failed to bind source address to ", sockopt.BindAddress)
+						}
+					}
 				}
 			})
 		}
@@ -219,7 +228,7 @@ type FakePacketConn struct {
 
 func (c *FakePacketConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
 	n, err = c.Read(p)
-	return n, &net.UDPAddr{IP: c.Conn.RemoteAddr().(*net.TCPAddr).IP, Port: c.Conn.RemoteAddr().(*net.TCPAddr).Port}, err
+	return n, c.RemoteAddr(), err
 }
 
 func (c *FakePacketConn) WriteTo(p []byte, _ net.Addr) (n int, err error) {
@@ -227,5 +236,15 @@ func (c *FakePacketConn) WriteTo(p []byte, _ net.Addr) (n int, err error) {
 }
 
 func (c *FakePacketConn) LocalAddr() net.Addr {
-	return &net.UDPAddr{IP: c.Conn.LocalAddr().(*net.TCPAddr).IP, Port: c.Conn.LocalAddr().(*net.TCPAddr).Port}
+	return &net.UDPAddr{
+		IP:   []byte{0, 0, 0, 0},
+		Port: 0,
+	}
+}
+
+func (c *FakePacketConn) RemoteAddr() net.Addr {
+	return &net.UDPAddr{
+		IP:   []byte{0, 0, 0, 0},
+		Port: 0,
+	}
 }

transport/internet/udp/dialer.go

@@ -26,14 +26,14 @@ func init() {
 
 			if streamSettings != nil && streamSettings.UdpmaskManager != nil {
 				var pktConn net.PacketConn
-				var udpAddr *net.UDPAddr
+				var udpAddr = conn.RemoteAddr().(*net.UDPAddr)
 				switch c := conn.(type) {
 				case *internet.PacketConnWrapper:
 					pktConn = c.PacketConn
-					udpAddr = c.RemoteAddr().(*net.UDPAddr)
+				case *net.UDPConn:
+					pktConn = c
 				case *cnc.Connection:
 					pktConn = &internet.FakePacketConn{Conn: c}
-					udpAddr = &net.UDPAddr{IP: c.RemoteAddr().(*net.TCPAddr).IP, Port: c.RemoteAddr().(*net.TCPAddr).Port}
 				default:
 					panic(reflect.TypeOf(c))
 				}