initial commit

listener/dns/metadata.go

@@ -0,0 +1,41 @@
+package dns
+
+import (
+	"time"
+
+	mdata "github.com/go-gost/gost/v3/pkg/metadata"
+)
+
+const (
+	defaultBacklog = 128
+)
+
+type metadata struct {
+	mode           string
+	readBufferSize int
+	readTimeout    time.Duration
+	writeTimeout   time.Duration
+	backlog        int
+}
+
+func (l *dnsListener) parseMetadata(md mdata.Metadata) (err error) {
+	const (
+		backlog        = "backlog"
+		mode           = "mode"
+		readBufferSize = "readBufferSize"
+		readTimeout    = "readTimeout"
+		writeTimeout   = "writeTimeout"
+	)
+
+	l.md.mode = mdata.GetString(md, mode)
+	l.md.readBufferSize = mdata.GetInt(md, readBufferSize)
+	l.md.readTimeout = mdata.GetDuration(md, readTimeout)
+	l.md.writeTimeout = mdata.GetDuration(md, writeTimeout)
+
+	l.md.backlog = mdata.GetInt(md, backlog)
+	if l.md.backlog <= 0 {
+		l.md.backlog = defaultBacklog
+	}
+
+	return
+}