add pkgs from core

connector/socks/v4/metadata.go

@@ -0,0 +1,25 @@
+package v4
+
+import (
+	"time"
+
+	mdata "github.com/go-gost/core/metadata"
+	mdx "github.com/go-gost/x/metadata"
+)
+
+type metadata struct {
+	connectTimeout time.Duration
+	disable4a      bool
+}
+
+func (c *socks4Connector) parseMetadata(md mdata.Metadata) (err error) {
+	const (
+		connectTimeout = "timeout"
+		disable4a      = "disable4a"
+	)
+
+	c.md.connectTimeout = mdx.GetDuration(md, connectTimeout)
+	c.md.disable4a = mdx.GetBool(md, disable4a)
+
+	return
+}