[Refactor]

1.allow maybe empty group
2.use COMPATIBLE(DIRECT alias) when proxy group is empty
3.http provider pass through tunnel

adapter/inbound/socket.go

@@ -20,3 +20,16 @@ func NewSocket(target socks5.Addr, conn net.Conn, source C.Type) *context.ConnCo
 
 	return context.NewConnContext(conn, metadata)
 }
+
+func NewInner(conn net.Conn, dst string, host string) *context.ConnContext {
+	metadata := &C.Metadata{}
+	metadata.NetWork = C.TCP
+	metadata.Type = C.INNER
+	metadata.DNSMode = C.DNSMapping
+	metadata.AddrType = C.AtypDomainName
+	metadata.Host = host
+	if _, port, err := parseAddr(dst); err == nil {
+		metadata.DstPort = port
+	}
+	return context.NewConnContext(conn, metadata)
+}

adapter/outbound/direct.go

@@ -44,3 +44,13 @@ func NewDirect() *Direct {
 		},
 	}
 }
+
+func NewCompatible() *Direct {
+	return &Direct{
+		Base: &Base{
+			name: "COMPATIBLE",
+			tp:   C.Compatible,
+			udp:  true,
+		},
+	}
+}

adapter/outboundgroup/common.go

@@ -1,6 +1,7 @@
 package outboundgroup
 
 import (
+	"github.com/Dreamacro/clash/tunnel"
 	"regexp"
 	"time"
 
@@ -21,6 +22,7 @@ func getProvidersProxies(providers []provider.ProxyProvider, touch bool, filter
 			proxies = append(proxies, provider.Proxies()...)
 		}
 	}
+
 	var filterReg *regexp.Regexp = nil
 	matchedProxies := []C.Proxy{}
 	if len(filter) > 0 {
@@ -32,8 +34,16 @@ func getProvidersProxies(providers []provider.ProxyProvider, touch bool, filter
 		}
 		//if no proxy matched, means bad filter, return all proxies
 		if len(matchedProxies) > 0 {
-			proxies = matchedProxies
+			return matchedProxies
+		} else {
+			return append([]C.Proxy{}, tunnel.Proxies()["COMPATIBLE"])
+		}
+	} else {
+		if len(proxies) == 0 {
+			return append(proxies, tunnel.Proxies()["COMPATIBLE"])
+		} else {
+			return proxies
 		}
 	}
-	return proxies
+
 }

adapter/outboundgroup/fallback.go

@@ -72,7 +72,7 @@ func (f *Fallback) onDialFailed() {
 		} else {
 			failedCount := f.failedTimes.Inc()
 			log.Warnln("%s failed count: %d", f.Name(), failedCount)
-			if failedCount >= 5 && failedCount < 6 {
+			if failedCount >= 5 {
 				log.Warnln("because %s failed multiple times, active health check", f.Name())
 				for _, proxyProvider := range f.providers {
 					go proxyProvider.HealthCheck()
@@ -97,10 +97,11 @@ func (f *Fallback) SupportUDP() bool {
 
 // MarshalJSON implements C.ProxyAdapter
 func (f *Fallback) MarshalJSON() ([]byte, error) {
-	var all []string
+	all := make([]string, 0)
 	for _, proxy := range f.proxies(false) {
 		all = append(all, proxy.Name())
 	}
+
 	return json.Marshal(map[string]interface{}{
 		"type": f.Type().String(),
 		"now":  f.Now(),

adapter/outboundgroup/loadbalance.go

@@ -150,10 +150,12 @@ func (lb *LoadBalance) proxies(touch bool) []C.Proxy {
 
 // MarshalJSON implements C.ProxyAdapter
 func (lb *LoadBalance) MarshalJSON() ([]byte, error) {
-	var all []string
+	all := make([]string, 0)
+
 	for _, proxy := range lb.proxies(false) {
 		all = append(all, proxy.Name())
 	}
+
 	return json.Marshal(map[string]interface{}{
 		"type": lb.Type().String(),
 		"all":  all,

adapter/outboundgroup/relay.go

@@ -23,7 +23,7 @@ type Relay struct {
 func (r *Relay) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.Conn, error) {
 	var proxies []C.Proxy
 	for _, proxy := range r.proxies(metadata, true) {
-		if proxy.Type() != C.Direct {
+		if proxy.Type() != C.Direct && proxy.Type() != C.Compatible {
 			proxies = append(proxies, proxy)
 		}
 	}
@@ -69,10 +69,12 @@ func (r *Relay) DialContext(ctx context.Context, metadata *C.Metadata, opts ...d
 
 // MarshalJSON implements C.ProxyAdapter
 func (r *Relay) MarshalJSON() ([]byte, error) {
-	var all []string
+	all := make([]string, 0)
+
 	for _, proxy := range r.rawProxies(false) {
 		all = append(all, proxy.Name())
 	}
+
 	return json.Marshal(map[string]interface{}{
 		"type": r.Type().String(),
 		"all":  all,

adapter/outboundgroup/selector.go

@@ -50,7 +50,8 @@ func (s *Selector) SupportUDP() bool {
 
 // MarshalJSON implements C.ProxyAdapter
 func (s *Selector) MarshalJSON() ([]byte, error) {
-	var all []string
+	all := make([]string, 0)
+
 	for _, proxy := range getProvidersProxies(s.providers, false, s.filter) {
 		all = append(all, proxy.Name())
 	}

adapter/outboundgroup/urltest.go

@@ -125,10 +125,12 @@ func (u *URLTest) SupportUDP() bool {
 
 // MarshalJSON implements C.ProxyAdapter
 func (u *URLTest) MarshalJSON() ([]byte, error) {
-	var all []string
+	all := make([]string, 0)
+
 	for _, proxy := range u.proxies(false) {
 		all = append(all, proxy.Name())
 	}
+
 	return json.Marshal(map[string]interface{}{
 		"type": u.Type().String(),
 		"now":  u.Now(),
@@ -149,7 +151,7 @@ func (u *URLTest) onDialFailed() {
 		} else {
 			failedCount := u.failedTimes.Inc()
 			log.Warnln("%s failed count: %d", u.Name(), failedCount)
-			if failedCount >= 5 && failedCount < 6 {
+			if failedCount >= 5 {
 				log.Warnln("because %s failed multiple times, active health check", u.Name())
 				for _, proxyProvider := range u.providers {
 					go proxyProvider.HealthCheck()

adapter/provider/provider.go

@@ -67,6 +67,10 @@ func (pp *proxySetProvider) Initial() error {
 	}
 
 	pp.onUpdate(elm)
+	if pp.healthCheck.auto() {
+		go pp.healthCheck.process()
+	}
+
 	return nil
 }
 
@@ -102,10 +106,6 @@ func NewProxySetProvider(name string, interval time.Duration, filter string, veh
 		return nil, fmt.Errorf("invalid filter regex: %w", err)
 	}
 
-	if hc.auto() {
-		go hc.process()
-	}
-
 	pd := &proxySetProvider{
 		proxies:     []C.Proxy{},
 		healthCheck: hc,
@@ -190,6 +190,10 @@ func (cp *compatibleProvider) Update() error {
 }
 
 func (cp *compatibleProvider) Initial() error {
+	if cp.healthCheck.auto() {
+		go cp.healthCheck.process()
+	}
+
 	return nil
 }
 
@@ -219,10 +223,6 @@ func NewCompatibleProvider(name string, proxies []C.Proxy, hc *HealthCheck) (*Co
 		return nil, errors.New("provider need one proxy at least")
 	}
 
-	if hc.auto() {
-		go hc.process()
-	}
-
 	pd := &compatibleProvider{
 		name:        name,
 		proxies:     proxies,

adapter/provider/vehicle.go

@@ -2,6 +2,7 @@ package provider
 
 import (
 	"context"
+	"github.com/Dreamacro/clash/listener/inner"
 	"io"
 	"net"
 	"net/http"
@@ -10,7 +11,6 @@ import (
 	"time"
 
 	netHttp "github.com/Dreamacro/clash/common/net"
-	"github.com/Dreamacro/clash/component/dialer"
 	types "github.com/Dreamacro/clash/constant/provider"
 )
 
@@ -77,7 +77,8 @@ func (h *HTTPVehicle) Read() ([]byte, error) {
 		TLSHandshakeTimeout:   10 * time.Second,
 		ExpectContinueTimeout: 1 * time.Second,
 		DialContext: func(ctx context.Context, network, address string) (net.Conn, error) {
-			return dialer.DialContext(ctx, network, address)
+			conn := inner.HandleTcp(address, uri.Hostname())
+			return conn, nil
 		},
 	}