Initial commit
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package core
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import (
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"context"
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"fmt"
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"net"
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"time"
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"git.zkcoi.com/zkcoi/meshray/core/connect"
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"git.zkcoi.com/zkcoi/meshray/core/plugins/wg"
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"git.zkcoi.com/zkcoi/meshray/core/transport"
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"go.uber.org/zap"
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)
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// Engine 引擎实例 - 一个组网的引擎实例
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type Engine struct {
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logger *zap.Logger
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scheduler *connect.StrategyScheduler
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connMgr *transport.ConnManager
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relay *transport.Relay
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plugin transport.ProtocolPlugin
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metrics *Metrics
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// 候选地址存储（用于 NotifyPeerInfo）
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candidateStore map[string][]Candidate
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routeIDStore map[string]uint32
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}
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// NewEngine 创建引擎实例
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func NewEngine(logger *zap.Logger, metrics *Metrics) *Engine {
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// 创建 WG 插件
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plugin := wg.NewWGPlugin()
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// 创建连接管理器
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connMgr := transport.NewConnManager(logger)
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// 创建数据转发器
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relay := transport.NewRelay(plugin, connMgr, logger)
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// 创建策略调度器
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scheduler := connect.NewStrategyScheduler(logger)
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scheduler.OnConnectionUpdate = func(peerID string, conn net.Conn, err error) {
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if err != nil {
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logger.Warn("收到策略调度器连接错误更新", zap.String("peer_id", peerID), zap.Error(err))
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}
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if conn != nil {
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logger.Info("策略调度器连接已建立，开始双向转发", zap.String("peer_id", peerID))
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connMgr.Add(peerID, conn)
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// 启动远端接收协程
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relay.StartReadFromRemoteConn(context.Background(), peerID, conn)
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}
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}
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scheduler.RegisterFactory(connect.NewDirectFactory(nil, logger)) // 1. Direct-UDP
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scheduler.RegisterFactory(connect.NewFakeTCPFactory(logger)) // 2. FakeTCP
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scheduler.RegisterFactory(connect.NewRealTCPFactory(logger)) // 3. RealTCP
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scheduler.RegisterFactory(connect.NewTURNFactory(connect.TURNProtocolUDP, nil, "", "", logger)) // 4. TURN-UDP
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// scheduler.RegisterFactory(connect.NewTURNFactoryQUIC(nil, "", "", logger)) // 5. TURN-QUIC (暂不启用)
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scheduler.RegisterFactory(connect.NewTURNFactory(connect.TURNProtocolTCP, nil, "", "", logger)) // 6. TURN-TCP
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scheduler.RegisterFactory(connect.NewTURNFactory(connect.TURNProtocolTLS, nil, "", "", logger)) // 7. TURN-TLS
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scheduler.RegisterFactory(connect.NewWebRTCFactory(&connect.ICEConfig{}, logger)) // 8. WebRTC
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scheduler.RegisterFactory(connect.NewWSFactory(nil, logger)) // 9. WS/WSS
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engine := &Engine{
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logger: logger,
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scheduler: scheduler,
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connMgr: connMgr,
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relay: relay,
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plugin: plugin,
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metrics: metrics,
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candidateStore: make(map[string][]Candidate),
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routeIDStore: make(map[string]uint32),
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}
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// 设置拨号触发器：当 WG 发包但没连接时自动 9 层拨号
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relay.OnDialTrigger = func(peerKey string) {
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go engine.initiateConnection(peerKey)
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}
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return engine
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}
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// Start 启动引擎
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func (e *Engine) Start() error {
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e.logger.Info("Core 引擎启动")
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return nil
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}
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// Stop 停止引擎
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func (e *Engine) Stop() error {
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e.logger.Info("Core 引擎停止")
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// 关闭所有连接
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if e.connMgr != nil {
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e.connMgr.CloseAll()
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}
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return nil
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}
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// SetICEConfig 设置 ICE 配置（用于 WebRTC）
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func (e *Engine) SetICEConfig(config connect.ICEConfig) error {
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e.logger.Info("更新 ICE 配置",
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zap.Int("stun_servers", len(config.STUNServers)),
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zap.Int("turn_servers", len(config.TURNServers)))
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// TODO: 实现 ICE 配置更新逻辑
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// 1. 找到 WebRTC 工厂
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// 2. 更新其 ICE 配置
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// 3. 重新注册工厂
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// 目前先记录日志，P3 阶段实现
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e.logger.Warn("SetICEConfig 暂未实现，将在 P3 阶段完成")
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return nil
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}
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// GetScheduler 获取策略调度器
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func (e *Engine) GetScheduler() *connect.StrategyScheduler {
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return e.scheduler
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}
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// GetConnMgr 获取连接管理器
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func (e *Engine) GetConnMgr() *transport.ConnManager {
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return e.connMgr
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}
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// GetRelay 获取数据转发器
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func (e *Engine) GetRelay() *transport.Relay {
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return e.relay
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}
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// GetMetrics 获取监控指标
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func (e *Engine) GetMetrics() *Metrics {
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return e.metrics
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}
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// Bind 为指定 Peer 开启本地端口，开始建连
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// peerKey: 对端公钥哈希（8 字符）
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// localPort: 本地监听端口（传 0 表示系统自动分配）
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// 返回值：实际绑定的端口号
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func (e *Engine) Bind(peerKey string, localPort int) (int, error) {
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// 1. 在本地端口监听
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addr := &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: localPort}
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conn, err := net.ListenUDP("udp", addr)
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if err != nil {
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return 0, fmt.Errorf("监听本地端口失败：%w", err)
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}
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actualPort := conn.LocalAddr().(*net.UDPAddr).Port
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// 2. 提取 route_id（从 peerKey 派生）
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routeID := extractRouteID(peerKey)
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// 3. 注册到 Relay
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e.relay.RegisterLocalPort(routeID, conn)
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// 4. 注册到 ConnManager
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e.connMgr.Add(peerKey, nil) // conn 初始为 nil，建连后设置
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// 5. 启动读取协程
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ctx := context.Background()
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e.relay.StartReadFromLocalPort(ctx, routeID, peerKey)
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e.logger.Info("Bind 成功",
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zap.String("peer_key", peerKey),
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zap.Int("local_port", actualPort),
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zap.Uint32("route_id", routeID))
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return actualPort, nil
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}
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// Unbind 停止指定 Peer 的端口监听
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func (e *Engine) Unbind(peerKey string) error {
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// 1. 提取 route_id
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routeID := extractRouteID(peerKey)
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// 2. 从 Relay 注销
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e.relay.UnregisterLocalPort(routeID)
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// 3. 从 ConnManager 移除
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e.connMgr.Remove(peerKey)
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// 4. 清理存储
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delete(e.candidateStore, peerKey)
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delete(e.routeIDStore, peerKey)
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e.logger.Info("Unbind 成功",
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zap.String("peer_key", peerKey),
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zap.Uint32("route_id", routeID))
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return nil
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}
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// EngineStatus Engine 状态
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type EngineStatus struct {
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PeerCount int `json:"peer_count"`
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Peers map[string]*PeerStatus `json:"peers"`
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// Metrics
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ActiveConnections int64 `json:"active_connections"`
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TotalConnections int64 `json:"total_connections"`
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BytesSent uint64 `json:"bytes_sent"`
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BytesReceived uint64 `json:"bytes_received"`
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StrategyFallbacks int64 `json:"strategy_fallbacks"`
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LastSwitchTime int64 `json:"last_switch_time"` // unix timestamp
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}
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// PeerStatus Peer 状态
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type PeerStatus struct {
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PeerKey string `json:"peer_key"`
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Connected bool `json:"connected"`
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Layer string `json:"layer,omitempty"` // 当前传输层
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}
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// GetStatus 查询 Engine 状态
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func (e *Engine) GetStatus() (*EngineStatus, error) {
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status := &EngineStatus{
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PeerCount: e.connMgr.Count(),
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Peers: make(map[string]*PeerStatus),
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}
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// 收集 Metrics
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if e.metrics != nil {
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status.ActiveConnections = e.metrics.GetActiveConnections()
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status.TotalConnections = e.metrics.GetTotalConnections()
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status.BytesSent = e.metrics.GetBytesSent()
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status.BytesReceived = e.metrics.GetBytesReceived()
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status.StrategyFallbacks = e.metrics.GetStrategyFallbacks()
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status.LastSwitchTime = e.metrics.GetLastSwitchTime().Unix()
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}
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// 收集所有 Peer 状态
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for peerKey, conn := range e.connMgr.GetAll() {
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peerStatus := &PeerStatus{
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PeerKey: peerKey,
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Connected: conn != nil,
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}
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if conn != nil {
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peerStatus.Layer = e.scheduler.GetPeerLayer(peerKey).String()
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}
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status.Peers[peerKey] = peerStatus
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}
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return status, nil
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}
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// Candidate 候选地址（与 connect.Candidate 对齐）
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type Candidate struct {
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Addr string `json:"addr"` // 候选地址（ip:port）
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Type string `json:"type"` // 候选类型：host/srflx/relay
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Priority int `json:"priority"` // 优先级
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Protocol string `json:"protocol"` // 协议：udp/tcp
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}
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// NotifyPeerInfo 下发对端候选地址和 route_id
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// peerKey: 对端公钥哈希
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// candidates: 对端候选地址列表（由信使服务器转发）
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// routeID: 路由 ID（用于数据转发）
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func (e *Engine) NotifyPeerInfo(peerKey string, candidates []Candidate, routeID uint32) error {
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// 1. 存储候选地址（用于后续建连）
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e.candidateStore[peerKey] = candidates
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// 2. 存储 route_id 映射
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e.routeIDStore[peerKey] = routeID
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// 3. 触发建连流程
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go e.initiateConnection(peerKey)
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e.logger.Info("NotifyPeerInfo 成功",
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zap.String("peer_key", peerKey),
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zap.Int("candidate_count", len(candidates)),
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zap.Uint32("route_id", routeID))
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return nil
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}
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// initiateConnection 触发建连流程
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func (e *Engine) initiateConnection(peerKey string) {
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// 1. 获取候选地址
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candidates := e.candidateStore[peerKey]
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if len(candidates) == 0 {
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return
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}
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// 2. 检查是否已经在拨号或已连接
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if conn, ok := e.connMgr.Get(peerKey); ok && conn != nil {
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return
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}
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// 2. 初始化 DialConfig
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config := &connect.DialConfig{
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PeerID: peerKey,
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Timeout: 10 * time.Second,
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Logger: e.logger,
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}
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e.logger.Info("开始建立连接到对端",
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zap.String("peer_key", peerKey),
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zap.Int("candidate_count", len(candidates)))
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// 3. 获取 RouteID
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_, ok := e.routeIDStore[peerKey]
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if !ok {
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e.logger.Warn("未找到 route_id",
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zap.String("peer_key", peerKey))
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return
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}
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// 4. 使用策略调度器尝试建连
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conn, err := e.scheduler.Dial(config)
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if err != nil {
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e.logger.Error("所有策略层尝试连接均失败",
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zap.String("peer_key", peerKey),
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zap.Error(err))
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return
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}
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// 5. 连接成功，更新到 ConnManager
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e.connMgr.Add(peerKey, conn)
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e.logger.Info("连接建立并更新成功", zap.String("peer_key", peerKey))
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}
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// extractRouteID 从 peerKey 提取 route_id（简化版本）
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// 实际应该使用一致的哈希算法
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func extractRouteID(peerKey string) uint32 {
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// 简单哈希：取前 4 个字符的 ASCII 码和
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var sum uint32 = 0
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for i := 0; i < len(peerKey) && i < 4; i++ {
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sum += uint32(peerKey[i])
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}
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return sum
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}
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