add pkgs from core

handler/socks/v5/metadata.go

@@ -0,0 +1,44 @@
+package v5
+
+import (
+	"math"
+	"time"
+
+	mdata "github.com/go-gost/core/metadata"
+	mdx "github.com/go-gost/x/metadata"
+)
+
+type metadata struct {
+	readTimeout       time.Duration
+	noTLS             bool
+	enableBind        bool
+	enableUDP         bool
+	udpBufferSize     int
+	compatibilityMode bool
+}
+
+func (h *socks5Handler) parseMetadata(md mdata.Metadata) (err error) {
+	const (
+		readTimeout       = "readTimeout"
+		noTLS             = "notls"
+		enableBind        = "bind"
+		enableUDP         = "udp"
+		udpBufferSize     = "udpBufferSize"
+		compatibilityMode = "comp"
+	)
+
+	h.md.readTimeout = mdx.GetDuration(md, readTimeout)
+	h.md.noTLS = mdx.GetBool(md, noTLS)
+	h.md.enableBind = mdx.GetBool(md, enableBind)
+	h.md.enableUDP = mdx.GetBool(md, enableUDP)
+
+	if bs := mdx.GetInt(md, udpBufferSize); bs > 0 {
+		h.md.udpBufferSize = int(math.Min(math.Max(float64(bs), 512), 64*1024))
+	} else {
+		h.md.udpBufferSize = 1500
+	}
+
+	h.md.compatibilityMode = mdx.GetBool(md, compatibilityMode)
+
+	return nil
+}