add chain

pkg/components/handler/ssu/metadata.go

@@ -0,0 +1,19 @@
+package ss
+
+import (
+	"time"
+
+	"github.com/shadowsocks/go-shadowsocks2/core"
+)
+
+const (
+	method      = "method"
+	password    = "password"
+	key         = "key"
+	readTimeout = "readTimeout"
+)
+
+type metadata struct {
+	cipher      core.Cipher
+	readTimeout time.Duration
+}