access log add detour tag

common/log/access.go

@@ -2,10 +2,17 @@ package log
 
 import (
 	"strings"
+	"context"
 
 	"v2ray.com/core/common/serial"
 )
 
+type logKey int
+
+const (
+	accessMessageKey logKey = iota
+)
+
 type AccessStatus string
 
 const (
@@ -18,6 +25,7 @@ type AccessMessage struct {
 	To     interface{}
 	Status AccessStatus
 	Reason interface{}
+	Detour interface{}
 }
 
 func (m *AccessMessage) String() string {
@@ -28,6 +36,19 @@ func (m *AccessMessage) String() string {
 	builder.WriteByte(' ')
 	builder.WriteString(serial.ToString(m.To))
 	builder.WriteByte(' ')
+	builder.WriteString(serial.ToString(m.Detour))
+	builder.WriteByte(' ')
 	builder.WriteString(serial.ToString(m.Reason))
 	return builder.String()
 }
+
+func ContextWithAccessMessage(ctx context.Context, accessMessage *AccessMessage) context.Context {
+	return context.WithValue(ctx, accessMessageKey, accessMessage)
+}
+
+func AccessMessageFromContext(ctx context.Context) *AccessMessage {
+	if accessMessage, ok := ctx.Value(accessMessageKey).(*AccessMessage); ok {
+		return accessMessage
+	}
+	return nil 
+}