initial commit

listener/kcp/metadata.go

@@ -0,0 +1,47 @@
+package kcp
+
+import (
+	"encoding/json"
+
+	mdata "github.com/go-gost/gost/v3/pkg/metadata"
+	kcp_util "github.com/go-gost/x/internal/util/kcp"
+)
+
+const (
+	defaultBacklog = 128
+)
+
+type metadata struct {
+	config  *kcp_util.Config
+	backlog int
+}
+
+func (l *kcpListener) parseMetadata(md mdata.Metadata) (err error) {
+	const (
+		backlog = "backlog"
+		config  = "config"
+	)
+
+	if m := mdata.GetStringMap(md, config); len(m) > 0 {
+		b, err := json.Marshal(m)
+		if err != nil {
+			return err
+		}
+		cfg := &kcp_util.Config{}
+		if err := json.Unmarshal(b, cfg); err != nil {
+			return err
+		}
+		l.md.config = cfg
+	}
+
+	if l.md.config == nil {
+		l.md.config = kcp_util.DefaultConfig
+	}
+
+	l.md.backlog = mdata.GetInt(md, backlog)
+	if l.md.backlog <= 0 {
+		l.md.backlog = defaultBacklog
+	}
+
+	return
+}