virtual-net: initial (#4751)

pkg/plugin/client/virtual_net.go

@@ -0,0 +1,71 @@
+// Copyright 2025 The frp Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build !frps
+
+package client
+
+import (
+	"context"
+
+	v1 "github.com/fatedier/frp/pkg/config/v1"
+	"github.com/fatedier/frp/pkg/util/xlog"
+)
+
+func init() {
+	Register(v1.PluginVirtualNet, NewVirtualNetPlugin)
+}
+
+type VirtualNetPlugin struct {
+	pluginCtx PluginContext
+	opts      *v1.VirtualNetPluginOptions
+}
+
+func NewVirtualNetPlugin(pluginCtx PluginContext, options v1.ClientPluginOptions) (Plugin, error) {
+	opts := options.(*v1.VirtualNetPluginOptions)
+
+	p := &VirtualNetPlugin{
+		pluginCtx: pluginCtx,
+		opts:      opts,
+	}
+	return p, nil
+}
+
+func (p *VirtualNetPlugin) Handle(ctx context.Context, connInfo *ConnectionInfo) {
+	xl := xlog.FromContextSafe(ctx)
+
+	// Verify if virtual network controller is available
+	if p.pluginCtx.VnetController == nil {
+		return
+	}
+
+	// Register the connection with the controller
+	routeName := p.pluginCtx.Name
+	err := p.pluginCtx.VnetController.RegisterServerConn(ctx, routeName, connInfo.Conn)
+	if err != nil {
+		xl.Errorf("virtual net failed to register server connection: %v", err)
+		return
+	}
+}
+
+func (p *VirtualNetPlugin) Name() string {
+	return v1.PluginVirtualNet
+}
+
+func (p *VirtualNetPlugin) Close() error {
+	if p.pluginCtx.VnetController != nil {
+		p.pluginCtx.VnetController.UnregisterServerConn(p.pluginCtx.Name)
+	}
+	return nil
+}