feat: Add XUDP migration support

adapter/outbound/vless.go

@@ -14,6 +14,7 @@ import (
 
 	"github.com/Dreamacro/clash/common/convert"
 	N "github.com/Dreamacro/clash/common/net"
+	"github.com/Dreamacro/clash/common/utils"
 	"github.com/Dreamacro/clash/component/dialer"
 	"github.com/Dreamacro/clash/component/proxydialer"
 	"github.com/Dreamacro/clash/component/resolver"
@@ -374,7 +375,9 @@ func (v *Vless) ListenPacketOnStreamConn(ctx context.Context, c net.Conn, metada
 
 	if v.option.XUDP {
 		return newPacketConn(N.NewThreadSafePacketConn(
-			vmessSing.NewXUDPConn(c, M.SocksaddrFromNet(metadata.UDPAddr())),
+			vmessSing.NewXUDPConn(c,
+				utils.GlobalID(metadata.SourceAddress()),
+				M.SocksaddrFromNet(metadata.UDPAddr())),
 		), v), nil
 	} else if v.option.PacketAddr {
 		return newPacketConn(N.NewThreadSafePacketConn(

adapter/outbound/vmess.go

@@ -12,6 +12,7 @@ import (
 	"sync"
 
 	N "github.com/Dreamacro/clash/common/net"
+	"github.com/Dreamacro/clash/common/utils"
 	"github.com/Dreamacro/clash/component/dialer"
 	"github.com/Dreamacro/clash/component/proxydialer"
 	"github.com/Dreamacro/clash/component/resolver"
@@ -224,29 +225,39 @@ func (v *Vmess) streamConn(c net.Conn, metadata *C.Metadata) (conn net.Conn, err
 	if metadata.NetWork == C.UDP {
 		if v.option.XUDP {
 			if N.NeedHandshake(c) {
-				conn = v.client.DialEarlyXUDPPacketConn(c, M.SocksaddrFromNet(metadata.UDPAddr()))
+				conn = v.client.DialEarlyXUDPPacketConn(c,
+					utils.GlobalID(metadata.SourceAddress()),
+					M.SocksaddrFromNet(metadata.UDPAddr()))
 			} else {
-				conn, err = v.client.DialXUDPPacketConn(c, M.SocksaddrFromNet(metadata.UDPAddr()))
+				conn, err = v.client.DialXUDPPacketConn(c,
+					utils.GlobalID(metadata.SourceAddress()),
+					M.SocksaddrFromNet(metadata.UDPAddr()))
 			}
 		} else if v.option.PacketAddr {
 			if N.NeedHandshake(c) {
-				conn = v.client.DialEarlyPacketConn(c, M.ParseSocksaddrHostPort(packetaddr.SeqPacketMagicAddress, 443))
+				conn = v.client.DialEarlyPacketConn(c,
+					M.ParseSocksaddrHostPort(packetaddr.SeqPacketMagicAddress, 443))
 			} else {
-				conn, err = v.client.DialPacketConn(c, M.ParseSocksaddrHostPort(packetaddr.SeqPacketMagicAddress, 443))
+				conn, err = v.client.DialPacketConn(c,
+					M.ParseSocksaddrHostPort(packetaddr.SeqPacketMagicAddress, 443))
 			}
 			conn = packetaddr.NewBindConn(conn)
 		} else {
 			if N.NeedHandshake(c) {
-				conn = v.client.DialEarlyPacketConn(c, M.SocksaddrFromNet(metadata.UDPAddr()))
+				conn = v.client.DialEarlyPacketConn(c,
+					M.SocksaddrFromNet(metadata.UDPAddr()))
 			} else {
-				conn, err = v.client.DialPacketConn(c, M.SocksaddrFromNet(metadata.UDPAddr()))
+				conn, err = v.client.DialPacketConn(c,
+					M.SocksaddrFromNet(metadata.UDPAddr()))
 			}
 		}
 	} else {
 		if N.NeedHandshake(c) {
-			conn = v.client.DialEarlyConn(c, M.ParseSocksaddr(metadata.RemoteAddress()))
+			conn = v.client.DialEarlyConn(c,
+				M.ParseSocksaddr(metadata.RemoteAddress()))
 		} else {
-			conn, err = v.client.DialConn(c, M.ParseSocksaddr(metadata.RemoteAddress()))
+			conn, err = v.client.DialConn(c,
+				M.ParseSocksaddr(metadata.RemoteAddress()))
 		}
 	}
 	if err != nil {

common/utils/global_id.go

@@ -0,0 +1,13 @@
+package utils
+
+import (
+	"hash/maphash"
+	"unsafe"
+)
+
+var globalSeed = maphash.MakeSeed()
+
+func GlobalID(material string) (id [8]byte) {
+	*(*uint64)(unsafe.Pointer(&id[0])) = maphash.String(globalSeed, material)
+	return
+}

go.mod

@@ -108,4 +108,4 @@ require (
 
 replace github.com/sagernet/sing => github.com/metacubex/sing v0.0.0-20230530121223-b768faae5c6b
 
-replace github.com/sagernet/sing-vmess => github.com/metacubex/sing-vmess v0.1.5-0.20230520082358-78b126617899
+replace github.com/sagernet/sing-vmess => github.com/metacubex/sing-vmess v0.1.5-0.20230607134851-17f84aec22a1

go.sum

@@ -103,8 +103,8 @@ github.com/metacubex/sing-shadowsocks2 v0.0.0-20230529235701-a238874242ca h1:10q
 github.com/metacubex/sing-shadowsocks2 v0.0.0-20230529235701-a238874242ca/go.mod h1:jVDD4N22bDPPKA73NvB7aqdlLWiAwv8D+jx7HwhcWak=
 github.com/metacubex/sing-tun v0.1.5-0.20230530125750-171afb2dfd8e h1:7QlJQl4S3F3YXn48fYxjymMw8HkXg9bl++hLi4ZRyCY=
 github.com/metacubex/sing-tun v0.1.5-0.20230530125750-171afb2dfd8e/go.mod h1:u9onX49LZPYuIPQ7SdM64Gnins8y5wg4Cn6ZYRSxWHU=
-github.com/metacubex/sing-vmess v0.1.5-0.20230520082358-78b126617899 h1:iRfcuztp7REfmOyasSlCL/pqNWfUDMTJ2CwbGpxpeks=
+github.com/metacubex/sing-vmess v0.1.5-0.20230607134851-17f84aec22a1 h1:ARhfmDKWzOsDEX5oUiC8bnz7FxQFukLV6fBiNM73r/M=
-github.com/metacubex/sing-vmess v0.1.5-0.20230520082358-78b126617899/go.mod h1:RSt9rxGHllLdc5JUebkQwaqyWLx09Lqya37DlBe8CP8=
+github.com/metacubex/sing-vmess v0.1.5-0.20230607134851-17f84aec22a1/go.mod h1:RSt9rxGHllLdc5JUebkQwaqyWLx09Lqya37DlBe8CP8=
 github.com/metacubex/sing-wireguard v0.0.0-20230426030325-41db09ae771a h1:cWKym33Qvl6HA3hj4/YuYD8hHyqQPb47wT5cJRAPgco=
 github.com/metacubex/sing-wireguard v0.0.0-20230426030325-41db09ae771a/go.mod h1:Bsw2BvKMMMY0FhZPseDI50ZOalvoUPMKYyGpyqvIIqY=
 github.com/miekg/dns v1.1.54 h1:5jon9mWcb0sFJGpnI99tOMhCPyJ+RPVz5b63MQG0VWI=

transport/vless/conn.go

@@ -203,24 +203,27 @@ func newConn(conn net.Conn, client *Client, dst *DstAddr) (net.Conn, error) {
 		needHandshake:  true,
 	}
 
-	if !dst.UDP && client.Addons != nil {
+	if client.Addons != nil {
 		switch client.Addons.Flow {
 		case XRO, XRD, XRS:
-			if xtlsConn, ok := conn.(*xtls.Conn); ok {
+			if !dst.UDP {
-				xtlsConn.RPRX = true
+				if xtlsConn, ok := conn.(*xtls.Conn); ok {
-				xtlsConn.SHOW = client.XTLSShow
+					xtlsConn.RPRX = true
-				xtlsConn.MARK = "XTLS"
+					xtlsConn.SHOW = client.XTLSShow
-				if client.Addons.Flow == XRS {
+					xtlsConn.MARK = "XTLS"
-					client.Addons.Flow = XRD
+					if client.Addons.Flow == XRS {
-				}
+						client.Addons.Flow = XRD
+					}
 
-				if client.Addons.Flow == XRD {
+					if client.Addons.Flow == XRD {
-					xtlsConn.DirectMode = true
+						xtlsConn.DirectMode = true
+					}
+					c.addons = client.Addons
+				} else {
+					return nil, fmt.Errorf("failed to use %s, maybe \"security\" is not \"xtls\"", client.Addons.Flow)
 				}
-				c.addons = client.Addons
-			} else {
-				return nil, fmt.Errorf("failed to use %s, maybe \"security\" is not \"xtls\"", client.Addons.Flow)
 			}
+
 		case XRV:
 			visionConn, err := vision.NewConn(c, c.id)
 			if err != nil {