initial commit

handler/relay/metadata.go

@@ -0,0 +1,35 @@
+package relay
+
+import (
+	"math"
+	"time"
+
+	mdata "github.com/go-gost/gost/v3/pkg/metadata"
+)
+
+type metadata struct {
+	readTimeout   time.Duration
+	enableBind    bool
+	udpBufferSize int
+	noDelay       bool
+}
+
+func (h *relayHandler) parseMetadata(md mdata.Metadata) (err error) {
+	const (
+		readTimeout   = "readTimeout"
+		enableBind    = "bind"
+		udpBufferSize = "udpBufferSize"
+		noDelay       = "nodelay"
+	)
+
+	h.md.readTimeout = mdata.GetDuration(md, readTimeout)
+	h.md.enableBind = mdata.GetBool(md, enableBind)
+	h.md.noDelay = mdata.GetBool(md, noDelay)
+
+	if bs := mdata.GetInt(md, udpBufferSize); bs > 0 {
+		h.md.udpBufferSize = int(math.Min(math.Max(float64(bs), 512), 64*1024))
+	} else {
+		h.md.udpBufferSize = 1024
+	}
+	return
+}