Dokodemo-door: Add simple `tunnel` config (alias and default values) (#4968)

dokodemo-door -> tunnel
freedom -> direct
blackhole -> block

https://github.com/XTLS/Xray-core/discussions/4966#discussioncomment-13948546
https://github.com/XTLS/Xray-core/pull/4967#issuecomment-3143951306

infra/conf/dokodemo.go

@@ -6,21 +6,21 @@ import (
 )
 
 type DokodemoConfig struct {
-	Host        *Address     `json:"address"`
-	PortValue   uint16       `json:"port"`
-	NetworkList *NetworkList `json:"network"`
-	Redirect    bool         `json:"followRedirect"`
-	UserLevel   uint32       `json:"userLevel"`
+	Address        *Address     `json:"address"`
+	Port           uint16       `json:"port"`
+	Network        *NetworkList `json:"network"`
+	FollowRedirect bool         `json:"followRedirect"`
+	UserLevel      uint32       `json:"userLevel"`
 }
 
 func (v *DokodemoConfig) Build() (proto.Message, error) {
 	config := new(dokodemo.Config)
-	if v.Host != nil {
-		config.Address = v.Host.Build()
+	if v.Address != nil {
+		config.Address = v.Address.Build()
 	}
-	config.Port = uint32(v.PortValue)
-	config.Networks = v.NetworkList.Build()
-	config.FollowRedirect = v.Redirect
+	config.Port = uint32(v.Port)
+	config.Networks = v.Network.Build()
+	config.FollowRedirect = v.FollowRedirect
 	config.UserLevel = v.UserLevel
 	return config, nil
 }

infra/conf/xray.go

@@ -21,6 +21,7 @@ import (
 
 var (
 	inboundConfigLoader = NewJSONConfigLoader(ConfigCreatorCache{
+		"tunnel":        func() interface{} { return new(DokodemoConfig) },
 		"dokodemo-door": func() interface{} { return new(DokodemoConfig) },
 		"http":          func() interface{} { return new(HTTPServerConfig) },
 		"shadowsocks":   func() interface{} { return new(ShadowsocksServerConfig) },
@@ -33,8 +34,10 @@ var (
 	}, "protocol", "settings")
 
 	outboundConfigLoader = NewJSONConfigLoader(ConfigCreatorCache{
+		"block":       func() interface{} { return new(BlackholeConfig) },
 		"blackhole":   func() interface{} { return new(BlackholeConfig) },
 		"loopback":    func() interface{} { return new(LoopbackConfig) },
+		"direct":      func() interface{} { return new(FreedomConfig) },
 		"freedom":     func() interface{} { return new(FreedomConfig) },
 		"http":        func() interface{} { return new(HTTPClientConfig) },
 		"shadowsocks": func() interface{} { return new(ShadowsocksClientConfig) },
@@ -242,7 +245,7 @@ func (c *InboundDetourConfig) Build() (*core.InboundHandlerConfig, error) {
 		return nil, errors.New("failed to load inbound detour config for protocol ", c.Protocol).Base(err)
 	}
 	if dokodemoConfig, ok := rawConfig.(*DokodemoConfig); ok {
-		receiverSettings.ReceiveOriginalDestination = dokodemoConfig.Redirect
+		receiverSettings.ReceiveOriginalDestination = dokodemoConfig.FollowRedirect
 	}
 	ts, err := rawConfig.(Buildable).Build()
 	if err != nil {

proxy/dokodemo/dokodemo.go

@@ -3,6 +3,8 @@ package dokodemo
 import (
 	"context"
 	"runtime"
+	"strconv"
+	"strings"
 	"sync/atomic"
 
 	"github.com/xtls/xray-core/common"
@@ -73,6 +75,25 @@ func (d *DokodemoDoor) Process(ctx context.Context, network net.Network, conn st
 		Port:    d.port,
 	}
 
+	if !d.config.FollowRedirect {
+		host, port, err := net.SplitHostPort(conn.LocalAddr().String())
+		if dest.Address == nil {
+			if err != nil {
+				dest.Address = net.DomainAddress("localhost")
+			} else {
+				if strings.Contains(host, ".") {
+					dest.Address = net.LocalHostIP
+				} else {
+					dest.Address = net.LocalHostIPv6
+				}
+			}
+		}
+		if dest.Port == 0 {
+			dest.Port = net.Port(common.Must2(strconv.Atoi(port)).(int))
+		}
+
+	}
+
 	destinationOverridden := false
 	if d.config.FollowRedirect {
 		outbounds := session.OutboundsFromContext(ctx)