增加转发开关

runtime_settings_cache.go

@@ -0,0 +1,47 @@
+package main
+
+import (
+	"fmt"
+	"sync"
+)
+
+type runtimeSettingsCache struct {
+	mu       sync.RWMutex
+	settings runtimeSettingsSnapshot
+}
+
+func newRuntimeSettingsCache(store *store) (*runtimeSettingsCache, error) {
+	cache := &runtimeSettingsCache{}
+	if err := cache.Reload(store); err != nil {
+		return nil, err
+	}
+	return cache, nil
+}
+
+func (c *runtimeSettingsCache) Reload(store *store) error {
+	if store == nil {
+		return fmt.Errorf("store is required")
+	}
+	settings, err := store.GetRuntimeSettings()
+	if err != nil {
+		return err
+	}
+
+	c.mu.Lock()
+	c.settings = settings
+	c.mu.Unlock()
+	return nil
+}
+
+func (c *runtimeSettingsCache) Snapshot() runtimeSettingsSnapshot {
+	if c == nil {
+		return runtimeSettingsSnapshot{}
+	}
+	c.mu.RLock()
+	defer c.mu.RUnlock()
+	return c.settings
+}
+
+func (c *runtimeSettingsCache) AllowEncryptedForwarding() bool {
+	return c.Snapshot().AllowEncryptedForwarding
+}