add socks

pkg/handler/socks/v4/metadata.go

@@ -0,0 +1,19 @@
+package v4
+
+import (
+	"time"
+
+	"github.com/go-gost/gost/pkg/auth"
+)
+
+const (
+	authsKey    = "auths"
+	readTimeout = "readTimeout"
+	retryCount  = "retry"
+)
+
+type metadata struct {
+	authenticator auth.Authenticator
+	readTimeout   time.Duration
+	retryCount    int
+}