[Refactor]

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

listener/inner/tcp.go

@@ -0,0 +1,20 @@
+package inner
+
+import (
+	"github.com/Dreamacro/clash/adapter/inbound"
+	C "github.com/Dreamacro/clash/constant"
+	"net"
+)
+
+var tcpIn chan<- C.ConnContext
+
+func New(in chan<- C.ConnContext) {
+	tcpIn = in
+}
+
+func HandleTcp(dst string, host string) net.Conn {
+	conn1, conn2 := net.Pipe()
+	context := inbound.NewInner(conn2, dst, host)
+	tcpIn <- context
+	return conn1
+}

listener/listener.go

@@ -2,6 +2,7 @@ package proxy
 
 import (
 	"fmt"
+	"github.com/Dreamacro/clash/listener/inner"
 	"net"
 	"runtime"
 	"strconv"
@@ -124,6 +125,7 @@ func ReCreateSocks(port int, tcpIn chan<- C.ConnContext, udpIn chan<- *inbound.P
 			log.Errorln("Start SOCKS server error: %s", err.Error())
 		}
 	}()
+	inner.New(tcpIn)
 
 	addr := genAddr(bindAddress, port, allowLan)