prototype for plugins

plugin.go

@@ -0,0 +1,53 @@
+package core
+
+import (
+	"os"
+	"path/filepath"
+	"plugin"
+	"strings"
+
+	"v2ray.com/core/app/log"
+	"v2ray.com/core/common/platform"
+)
+
+type PluginMetadata struct {
+	Name string
+}
+
+const GetMetadataFuncName = "GetPluginMetadata"
+
+type GetMetadataFunc func() PluginMetadata
+
+func LoadPlugins() error {
+	pluginPath := platform.GetPluginDirectory()
+
+	dir, err := os.Open(pluginPath)
+	if err != nil {
+		return err
+	}
+	defer dir.Close()
+
+	files, err := dir.Readdir(-1)
+	if err != nil {
+		return err
+	}
+
+	for _, file := range files {
+		if !file.IsDir() && strings.HasSuffix(file.Name(), ".so") {
+			p, err := plugin.Open(filepath.Join(pluginPath, file.Name()))
+			if err != nil {
+				return err
+			}
+			f, err := p.Lookup(GetMetadataFuncName)
+			if err != nil {
+				return err
+			}
+			if gmf, ok := f.(GetMetadataFunc); ok {
+				metadata := gmf()
+				log.Trace(newError("plugin (", metadata.Name, ") loaded."))
+			}
+		}
+	}
+
+	return nil
+}