Chore: make the code more semantic

adapters/outbound/direct.go

@@ -0,0 +1,45 @@
+package adapters
+
+import (
+	"net"
+
+	C "github.com/Dreamacro/clash/constant"
+)
+
+// DirectAdapter is a directly connected adapter
+type DirectAdapter struct {
+	conn net.Conn
+}
+
+// Close is used to close connection
+func (d *DirectAdapter) Close() {
+	d.conn.Close()
+}
+
+// Conn is used to http request
+func (d *DirectAdapter) Conn() net.Conn {
+	return d.conn
+}
+
+type Direct struct{}
+
+func (d *Direct) Name() string {
+	return "Direct"
+}
+
+func (d *Direct) Type() C.AdapterType {
+	return C.Direct
+}
+
+func (d *Direct) Generator(metadata *C.Metadata) (adapter C.ProxyAdapter, err error) {
+	c, err := net.Dial("tcp", net.JoinHostPort(metadata.String(), metadata.Port))
+	if err != nil {
+		return
+	}
+	tcpKeepAlive(c)
+	return &DirectAdapter{conn: c}, nil
+}
+
+func NewDirect() *Direct {
+	return &Direct{}
+}