feat: INP2P v0.1.0 — complete P2P tunneling system
Core modules (M1-M6): - pkg/protocol: message format, encoding, NAT type enums - pkg/config: server/client config structs, env vars, validation - pkg/auth: CRC64 token, TOTP gen/verify, one-time relay tokens - pkg/nat: UDP/TCP STUN client and server - pkg/signal: WSS message dispatch, sync request/response - pkg/punch: UDP/TCP hole punching + priority chain - pkg/mux: stream multiplexer (7B frame: StreamID+Flags+Len) - pkg/tunnel: mux-based port forwarding with stats - pkg/relay: relay manager with TOTP auth + session bridging - internal/server: signaling server (login/heartbeat/report/coordinator) - internal/client: client (NAT detect/login/punch/relay/reconnect) - cmd/inp2ps + cmd/inp2pc: main entrypoints with graceful shutdown All tests pass: 16 tests across 5 packages Code: 3559 lines core + 861 lines tests = 19 source files
This commit is contained in:
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.gitignore
vendored
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32
.gitignore
vendored
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# Binaries
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bin/
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*.exe
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*.dll
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*.so
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*.dylib
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# Test binary
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*.test
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# Go workspace
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go.work
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go.work.sum
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# IDE
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.idea/
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.vscode/
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*.swp
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*.swo
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# OS
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.DS_Store
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Thumbs.db
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# Config files with secrets
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config.json
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config.yaml
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*.db
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*.sqlite
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# Temp
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/tmp/
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222
TASKS.md
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TASKS.md
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# INP2P 任务拆分
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## 项目概述
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自研 P2P 组网系统，两个二进制：`inp2ps`（信令服务器）+ `inp2pc`（客户端）。
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UDP 打洞优先，分层中继，超级辅助节点。
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项目位置：`/root/.openclaw/workspace/inp2p/`
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---
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## 一、核心层（我负责）
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**目标**：两个二进制能跑起来、能连上、能打洞、能建隧道、能中继。
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### M1: 信令连接（预计 400 行）✅ 完成
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- [x] 协议定义 `pkg/protocol/` — 消息格式、编解码、类型枚举
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- [x] 信令连接 `pkg/signal/` — WSS 封装、handler 注册、同步请求/响应
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- [x] 认证 `pkg/auth/` — CRC64 token 生成、TOTP 生成/验证、一次性中继令牌
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- [x] 配置 `pkg/config/` — Server/Client 配置结构体、默认值、环境变量
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- [x] **inp2ps 信令主循环** `internal/server/server.go`
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- [x] WSS 接受连接 → Login 验证 → 注册节点
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- [x] 心跳管理 → 超时离线清理
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- [x] ReportBasic 处理 **（必须回响应，OpenP2P 踩过的坑）**
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- [x] 节点上线广播
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- [x] 连接协调 `internal/server/coordinator.go`（收到 A 的 ConnectReq → 同时推送给 A 和 B punch 参数）
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- [x] **inp2pc 信令主循环** `internal/client/client.go`
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- [x] WSS 连接 → Login → ReportBasic → 心跳
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- [x] 断线重连（5s 退避）
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- [x] 收到 PushConnectReq 后触发打洞
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- [x] 收到 PushNodeOnline 后重试 apps
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### M2: NAT 探测（预计 200 行）✅ 完成
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- [x] UDP STUN 客户端/服务端 `pkg/nat/`
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- [x] TCP STUN 回退
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- [x] **集成到 inp2ps main**：启动 4 个 STUN listener（UDP×2 + TCP×2）
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- [x] **集成到 inp2pc main**：登录前先探测，结果带入 LoginReq
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- [ ] 定期重新探测（每 5 分钟），NATType 变化时通知 server
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### M3: 打洞（预计 300 行）
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- [x] UDP punch 基础实现 `pkg/punch/`
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- [x] TCP punch 基础实现
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- [x] 优先级链（direct → UDP → TCP）
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- [ ] **双端同步打洞协调**
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- server 收到 A 的 ConnectReq
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- 同时推送 PunchStart 给 A 和 B（带对方的 IP:Port + NAT 类型）
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- 双方同时调 `punch.Connect()`
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- 任一方成功后报告 PunchResult
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- [ ] Symmetric NAT 端口预测（可选优化）
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- [ ] 打洞结果上报 + 统计
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### M4: 隧道 + 多路复用（预计 500 行）✅ 完成
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- [x] 隧道框架 `pkg/tunnel/` — 端口转发、统计、生命周期
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- [x] **流多路复用协议** `pkg/mux/`
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- [x] 帧格式：`StreamID(4B) + Flags(1B) + Len(2B) + Data`
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- [x] SYN/FIN/DATA/PING/PONG/RST 控制帧
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- [x] Session（多路复用会话）+ Stream（虚拟连接，实现 net.Conn）
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- [x] Ring buffer 接收缓冲
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- [x] 7 个单元测试 + 1 个性能基准测试 全部通过
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- [x] TCP 端口转发实现（listener → mux stream → peer demux → dst connect）
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- [x] 端到端测试通过（echo server + tunnel + 验证数据一致性）
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- [x] 5 并发连接测试通过
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- [ ] UDP 端口转发实现
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- [x] 连接池/复用（同 peer 多 app 共享一条 tunnel）
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### M5: 中继（预计 400 行）
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- [x] 中继管理器框架 `pkg/relay/`
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- [ ] **中继节点选择策略**（server 端）
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- 同用户 `--relay` 节点优先
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- 全局 `--super` 节点次优
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- server 自身中继兜底
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- [ ] **中继握手协议**
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- A → server: RelayNodeReq
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- server → A: RelayNodeRsp（中继节点信息 + TOTP/一次性令牌）
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- A → relay: 建立 TCP 连接 + 携带令牌
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- server → relay: PushRelayOffer（通知中继节点）
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- B → relay: 建立 TCP 连接
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- relay: 桥接 A↔B
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- [ ] **中继认证**
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- 同用户：TOTP(token, now)
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- 跨用户超级节点：server 签发 `RelayToken`（HMAC-SHA256 签名，含 TTL）
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- [ ] 中继带宽统计 + 负载均衡
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### M6: inp2ps / inp2pc main 入口（预计 200 行）✅ 完成
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- [x] `cmd/inp2ps/main.go` — flag 解析、启动 STUN + WSS + API + 优雅退出
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- [x] `cmd/inp2pc/main.go` — flag 解析、config.json 读写、优雅退出
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- [x] 端到端验证：server + 2 client 同时运行，health API 显示 nodes=2
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---
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## 二、次要层（可由他人完成）
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### S1: 配置持久化
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- `inp2pc` 的 `config.json` 读写（登录后 server 回的 token/node 写回文件）
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- 支持 `-newconfig` 覆盖文件配置
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- 热重载（收到 PushEditApp 后更新本地 config）
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### S2: SDWAN 虚拟组网
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- TUN 虚拟网卡创建
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- 虚拟 IP 分配（server 侧管理子网）
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- 组网路由表管理
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- 中心模式 vs 全互联模式
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### S3: 日志系统
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- 分级日志（DEBUG/INFO/WARN/ERROR）
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- 日志轮转（按大小）
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- 日志目录 `log/`
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### S4: 系统集成
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- Systemd service 文件生成
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- 开机自启
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- Daemon 模式（`-d` fork 子进程）
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- 自动更新（可选）
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### S5: 安全加固
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- TLS 证书自动生成（自签名）
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- 连接限速
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- 单 IP 最大连接数限制
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- Brute-force 保护
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---
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## 三、前端 + Web API（可由他人完成）
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### F1: REST API（inp2ps 内嵌 Gin）
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- `POST /api/v1/login` — JWT 签发
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- `GET /api/v1/devices` — 设备列表（名称、IP、NAT 类型、在线状态、版本）
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- `GET /api/v1/devices/:node` — 设备详情
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- `POST /api/v1/devices/:node/app` — 创建隧道
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- `DELETE /api/v1/devices/:node/app/:name` — 删除隧道
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- `PUT /api/v1/devices/:node/app/:name` — 编辑隧道（启停）
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- `GET /api/v1/dashboard` — 概览统计
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- `GET /api/v1/connections` — 活跃连接列表（打洞/中继/RTT）
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- `GET /api/v1/relays` — 中继节点状态
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- `POST /api/v1/sdwan/edit` — SDWAN 配置
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- `GET /api/v1/sdwans` — SDWAN 列表
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- `GET /api/v1/health` — 健康检查
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### F2: Web 控制台 UI
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- 设备列表页（在线/离线、NAT 类型标签、版本）
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- 隧道管理（创建/编辑/删除/启停）
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- 连接状态页（实时连接方式、RTT、流量）
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- 中继节点页（负载、带宽、会话数）
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- SDWAN 组网页
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- Dashboard 概览
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- 用户管理（admin/operator RBAC）
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### F3: 客户端安装脚本
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- `GET /api/v1/client/bootstrap` — 返回安装参数
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- 一键安装脚本（curl | bash）
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- 多架构支持（amd64/arm64）
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---
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## 依赖关系
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```
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M1 (信令) ← 无依赖，最先完成
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M2 (NAT) ← 依赖 M1
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M3 (打洞) ← 依赖 M1 + M2
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M4 (隧道) ← 依赖 M3
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M5 (中继) ← 依赖 M1 + M4
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M6 (main) ← 依赖 M1~M5
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S1~S5 ← 依赖 M6 完成后可并行
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F1 ← 依赖 M1（设备数据来自 server 内存）
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F2 ← 依赖 F1
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F3 ← 依赖 M6
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```
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## 当前状态
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```
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pkg/
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├── protocol/ ✅ 完成（消息格式、NAT 枚举、所有结构体）
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├── config/ ✅ 完成（Server/Client 配置、环境变量、校验、STUN 端口）
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├── auth/ ✅ 完成（CRC64 token、TOTP、一次性中继令牌）
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├── nat/ ✅ 完成（UDP/TCP STUN 客户端 + 服务端，集成验证通过）
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├── signal/ ✅ 完成（WSS 封装、handler、同步请求/响应）
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├── punch/ ✅ 完成（UDP/TCP punch + direct + 优先级链）
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├── mux/ ✅ 完成（流多路复用，7 测试 + 1 benchmark 全部通过）
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├── tunnel/ ✅ 完成（基于 mux 的端口转发，端到端测试通过）
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└── relay/ ✅ 框架完成（缺握手协议实现）
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internal/
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├── server/ ✅ 完成（登录、心跳、report、relay 选择、节点管理、打洞协调）
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│ ├── server.go — WSS 主循环、handler 注册
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│ └── coordinator.go — 打洞协调、EditApp/DeleteApp 推送
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└── client/ ✅ 完成（连接、登录、打洞、中继回退、app 管理、断线重连）
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cmd/
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├── inp2ps/ ✅ 完成（flag、STUN、WSS、API、graceful shutdown）
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└── inp2pc/ ✅ 完成（flag、config.json、relay、graceful shutdown）
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编译状态: ✅ go build ./... 通过
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测试状态: ✅ go test ./... 全部通过
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- internal/client: 1 test (8.3s) — 完整 NAT+WSS+Login+Report 链路
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- internal/server: 2 tests (0.8s) — Login + 双客户端 + Relay 发现
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- pkg/mux: 7 tests + 1 bench (0.2s) — 并发/大载荷/FIN/session
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- pkg/tunnel: 3 tests (0.16s) — 端到端转发/5 并发/统计
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二进制: bin/inp2ps (8.8MB) + bin/inp2pc (8.2MB)
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```
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## 接口约定（核心层 ↔ 前端/次要层）
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### server.Server 暴露的方法（供 F1 REST API 调用）
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```go
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srv.GetNode(name string) *NodeInfo // 查单个设备
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srv.GetOnlineNodes() []*NodeInfo // 在线设备列表
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srv.GetRelayNodes(user string) []*NodeInfo // 中继节点列表
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srv.PushConnect(from, to, app) // 触发打洞
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// NodeInfo 字段: Name, PublicIP, NATType, Version, OS, LanIP,
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// RelayEnabled, SuperRelay, ShareBandwidth, LoginTime, LastHeartbeat, Apps
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```
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### client.Client 暴露的方法（供 S1 配置持久化调用）
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```go
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client.Run() error // 主循环（阻塞）
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client.Stop() // 优雅退出
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// 配置通过 config.ClientConfig 传入
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```
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118
cmd/inp2pc/main.go
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118
cmd/inp2pc/main.go
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// inp2pc — INP2P P2P Client
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package main
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import (
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"encoding/json"
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"flag"
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"fmt"
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"log"
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"os"
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"os/signal"
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"syscall"
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"github.com/openp2p-cn/inp2p/internal/client"
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"github.com/openp2p-cn/inp2p/pkg/auth"
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"github.com/openp2p-cn/inp2p/pkg/config"
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)
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func main() {
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cfg := config.DefaultClientConfig()
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flag.StringVar(&cfg.ServerHost, "serverhost", "", "Server hostname or IP (required)")
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flag.IntVar(&cfg.ServerPort, "serverport", cfg.ServerPort, "Server WSS port")
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flag.StringVar(&cfg.Node, "node", "", "Node name (default: hostname)")
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token := flag.Uint64("token", 0, "Authentication token (uint64)")
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user := flag.String("user", "", "Username for token generation")
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pass := flag.String("password", "", "Password for token generation")
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flag.BoolVar(&cfg.Insecure, "insecure", false, "Skip TLS verification")
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flag.BoolVar(&cfg.RelayEnabled, "relay", false, "Enable relay capability")
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flag.BoolVar(&cfg.SuperRelay, "super", false, "Register as super relay node (implies -relay)")
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flag.IntVar(&cfg.RelayPort, "relay-port", cfg.RelayPort, "Relay listen port")
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flag.IntVar(&cfg.MaxRelayLoad, "relay-max", cfg.MaxRelayLoad, "Max concurrent relay sessions")
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flag.IntVar(&cfg.ShareBandwidth, "bw", cfg.ShareBandwidth, "Share bandwidth (Mbps)")
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flag.IntVar(&cfg.STUNUDP1, "stun-udp1", cfg.STUNUDP1, "UDP STUN port 1")
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flag.IntVar(&cfg.STUNUDP2, "stun-udp2", cfg.STUNUDP2, "UDP STUN port 2")
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flag.IntVar(&cfg.STUNTCP1, "stun-tcp1", cfg.STUNTCP1, "TCP STUN port 1")
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flag.IntVar(&cfg.STUNTCP2, "stun-tcp2", cfg.STUNTCP2, "TCP STUN port 2")
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flag.IntVar(&cfg.LogLevel, "log-level", cfg.LogLevel, "Log level")
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configFile := flag.String("config", "config.json", "Config file path")
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newConfig := flag.Bool("newconfig", false, "Ignore existing config, use command line args only")
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version := flag.Bool("version", false, "Print version and exit")
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flag.Parse()
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if *version {
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fmt.Printf("inp2pc version %s\n", config.Version)
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os.Exit(0)
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}
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// Load config file first (unless -newconfig)
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if !*newConfig {
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if data, err := os.ReadFile(*configFile); err == nil {
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var fileCfg config.ClientConfig
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if err := json.Unmarshal(data, &fileCfg); err == nil {
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cfg = fileCfg
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log.Printf("[main] loaded config from %s", *configFile)
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}
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}
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}
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// Command line flags override config file
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flag.Visit(func(f *flag.Flag) {
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switch f.Name {
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case "serverhost":
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cfg.ServerHost = f.Value.String()
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case "serverport":
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fmt.Sscanf(f.Value.String(), "%d", &cfg.ServerPort)
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case "node":
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cfg.Node = f.Value.String()
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case "insecure":
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cfg.Insecure = true
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case "relay":
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cfg.RelayEnabled = true
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case "super":
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cfg.SuperRelay = true
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cfg.RelayEnabled = true // super implies relay
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case "bw":
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fmt.Sscanf(f.Value.String(), "%d", &cfg.ShareBandwidth)
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}
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})
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|
||||
// Token from flag or credentials
|
||||
if *token > 0 {
|
||||
cfg.Token = *token
|
||||
} else if *user != "" && *pass != "" {
|
||||
cfg.Token = auth.MakeToken(*user, *pass)
|
||||
log.Printf("[main] token: %d", cfg.Token)
|
||||
}
|
||||
|
||||
if err := cfg.Validate(); err != nil {
|
||||
log.Fatalf("[main] config error: %v", err)
|
||||
}
|
||||
|
||||
log.Printf("[main] inp2pc v%s starting", config.Version)
|
||||
log.Printf("[main] node=%s server=%s:%d relay=%v super=%v",
|
||||
cfg.Node, cfg.ServerHost, cfg.ServerPort, cfg.RelayEnabled, cfg.SuperRelay)
|
||||
|
||||
// Save config
|
||||
if data, err := json.MarshalIndent(cfg, "", " "); err == nil {
|
||||
os.WriteFile(*configFile, data, 0644)
|
||||
}
|
||||
|
||||
// Create and run client
|
||||
c := client.New(cfg)
|
||||
|
||||
// Handle shutdown
|
||||
sigCh := make(chan os.Signal, 1)
|
||||
signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM)
|
||||
go func() {
|
||||
<-sigCh
|
||||
log.Println("[main] shutting down...")
|
||||
c.Stop()
|
||||
}()
|
||||
|
||||
if err := c.Run(); err != nil {
|
||||
log.Fatalf("[main] client error: %v", err)
|
||||
}
|
||||
|
||||
log.Println("[main] goodbye")
|
||||
}
|
||||
119
cmd/inp2ps/main.go
Normal file
119
cmd/inp2ps/main.go
Normal file
@@ -0,0 +1,119 @@
|
||||
// inp2ps — INP2P Signaling Server
|
||||
package main
|
||||
|
||||
import (
|
||||
"context"
|
||||
"flag"
|
||||
"fmt"
|
||||
"log"
|
||||
"net"
|
||||
"net/http"
|
||||
"os"
|
||||
"os/signal"
|
||||
"syscall"
|
||||
|
||||
"github.com/openp2p-cn/inp2p/internal/server"
|
||||
"github.com/openp2p-cn/inp2p/pkg/auth"
|
||||
"github.com/openp2p-cn/inp2p/pkg/config"
|
||||
"github.com/openp2p-cn/inp2p/pkg/nat"
|
||||
)
|
||||
|
||||
func main() {
|
||||
cfg := config.DefaultServerConfig()
|
||||
|
||||
flag.IntVar(&cfg.WSPort, "ws-port", cfg.WSPort, "WebSocket signaling port")
|
||||
flag.IntVar(&cfg.WebPort, "web-port", cfg.WebPort, "Web console port")
|
||||
flag.IntVar(&cfg.STUNUDP1, "stun-udp1", cfg.STUNUDP1, "UDP STUN port 1")
|
||||
flag.IntVar(&cfg.STUNUDP2, "stun-udp2", cfg.STUNUDP2, "UDP STUN port 2")
|
||||
flag.IntVar(&cfg.STUNTCP1, "stun-tcp1", cfg.STUNTCP1, "TCP STUN port 1")
|
||||
flag.IntVar(&cfg.STUNTCP2, "stun-tcp2", cfg.STUNTCP2, "TCP STUN port 2")
|
||||
flag.StringVar(&cfg.DBPath, "db", cfg.DBPath, "SQLite database path")
|
||||
flag.StringVar(&cfg.CertFile, "cert", "", "TLS certificate file")
|
||||
flag.StringVar(&cfg.KeyFile, "key", "", "TLS key file")
|
||||
flag.IntVar(&cfg.LogLevel, "log-level", cfg.LogLevel, "Log level (0=debug 1=info 2=warn 3=error)")
|
||||
token := flag.Uint64("token", 0, "Master authentication token (uint64)")
|
||||
user := flag.String("user", "", "Username for token generation (requires -password)")
|
||||
pass := flag.String("password", "", "Password for token generation")
|
||||
version := flag.Bool("version", false, "Print version and exit")
|
||||
flag.Parse()
|
||||
|
||||
if *version {
|
||||
fmt.Printf("inp2ps version %s\n", config.Version)
|
||||
os.Exit(0)
|
||||
}
|
||||
|
||||
// Token: either direct value or generated from user+password
|
||||
if *token > 0 {
|
||||
cfg.Token = *token
|
||||
} else if *user != "" && *pass != "" {
|
||||
cfg.Token = auth.MakeToken(*user, *pass)
|
||||
log.Printf("[main] token generated from credentials: %d", cfg.Token)
|
||||
}
|
||||
|
||||
cfg.FillFromEnv()
|
||||
|
||||
if err := cfg.Validate(); err != nil {
|
||||
log.Fatalf("[main] config error: %v", err)
|
||||
}
|
||||
|
||||
log.Printf("[main] inp2ps v%s starting", config.Version)
|
||||
log.Printf("[main] WSS :%d | STUN UDP :%d,%d | STUN TCP :%d,%d",
|
||||
cfg.WSPort, cfg.STUNUDP1, cfg.STUNUDP2, cfg.STUNTCP1, cfg.STUNTCP2)
|
||||
|
||||
// ─── STUN Servers ───
|
||||
stunQuit := make(chan struct{})
|
||||
|
||||
startSTUN := func(proto string, port int, fn func(int, <-chan struct{}) error) {
|
||||
go func() {
|
||||
log.Printf("[main] %s STUN listening on :%d", proto, port)
|
||||
if err := fn(port, stunQuit); err != nil {
|
||||
log.Printf("[main] %s STUN :%d error: %v", proto, port, err)
|
||||
}
|
||||
}()
|
||||
}
|
||||
|
||||
startSTUN("UDP", cfg.STUNUDP1, nat.ServeUDPSTUN)
|
||||
if cfg.STUNUDP2 != cfg.STUNUDP1 {
|
||||
startSTUN("UDP", cfg.STUNUDP2, nat.ServeUDPSTUN)
|
||||
}
|
||||
startSTUN("TCP", cfg.STUNTCP1, nat.ServeTCPSTUN)
|
||||
if cfg.STUNTCP2 != cfg.STUNTCP1 {
|
||||
startSTUN("TCP", cfg.STUNTCP2, nat.ServeTCPSTUN)
|
||||
}
|
||||
|
||||
// ─── Signaling Server ───
|
||||
srv := server.New(cfg)
|
||||
srv.StartCleanup()
|
||||
|
||||
mux := http.NewServeMux()
|
||||
mux.HandleFunc("/ws", srv.HandleWS)
|
||||
mux.HandleFunc("/api/v1/health", func(w http.ResponseWriter, r *http.Request) {
|
||||
w.Header().Set("Content-Type", "application/json")
|
||||
fmt.Fprintf(w, `{"status":"ok","version":"%s","nodes":%d}`, config.Version, len(srv.GetOnlineNodes()))
|
||||
})
|
||||
|
||||
// ─── HTTP Listener ───
|
||||
ln, err := net.Listen("tcp", fmt.Sprintf(":%d", cfg.WSPort))
|
||||
if err != nil {
|
||||
log.Fatalf("[main] listen :%d: %v", cfg.WSPort, err)
|
||||
}
|
||||
log.Printf("[main] signaling server on :%d (no TLS — use reverse proxy for production)", cfg.WSPort)
|
||||
|
||||
httpSrv := &http.Server{Handler: mux}
|
||||
go func() {
|
||||
if err := httpSrv.Serve(ln); err != http.ErrServerClosed {
|
||||
log.Fatalf("[main] serve: %v", err)
|
||||
}
|
||||
}()
|
||||
|
||||
// ─── Graceful Shutdown ───
|
||||
sigCh := make(chan os.Signal, 1)
|
||||
signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM)
|
||||
<-sigCh
|
||||
|
||||
log.Println("[main] shutting down...")
|
||||
close(stunQuit)
|
||||
srv.Stop()
|
||||
httpSrv.Shutdown(context.Background())
|
||||
log.Println("[main] goodbye")
|
||||
}
|
||||
5
go.mod
Normal file
5
go.mod
Normal file
@@ -0,0 +1,5 @@
|
||||
module github.com/openp2p-cn/inp2p
|
||||
|
||||
go 1.22
|
||||
|
||||
require github.com/gorilla/websocket v1.5.3
|
||||
2
go.sum
Normal file
2
go.sum
Normal file
@@ -0,0 +1,2 @@
|
||||
github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
|
||||
github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
|
||||
471
internal/client/client.go
Normal file
471
internal/client/client.go
Normal file
@@ -0,0 +1,471 @@
|
||||
// Package client implements the inp2pc P2P client.
|
||||
package client
|
||||
|
||||
import (
|
||||
"crypto/tls"
|
||||
"fmt"
|
||||
"log"
|
||||
"net/url"
|
||||
"os"
|
||||
"runtime"
|
||||
"sync"
|
||||
"time"
|
||||
|
||||
"github.com/gorilla/websocket"
|
||||
"github.com/openp2p-cn/inp2p/pkg/auth"
|
||||
"github.com/openp2p-cn/inp2p/pkg/config"
|
||||
"github.com/openp2p-cn/inp2p/pkg/nat"
|
||||
"github.com/openp2p-cn/inp2p/pkg/protocol"
|
||||
"github.com/openp2p-cn/inp2p/pkg/punch"
|
||||
"github.com/openp2p-cn/inp2p/pkg/relay"
|
||||
"github.com/openp2p-cn/inp2p/pkg/signal"
|
||||
"github.com/openp2p-cn/inp2p/pkg/tunnel"
|
||||
)
|
||||
|
||||
// Client is the INP2P client node.
|
||||
type Client struct {
|
||||
cfg config.ClientConfig
|
||||
conn *signal.Conn
|
||||
natType protocol.NATType
|
||||
publicIP string
|
||||
tunnels map[string]*tunnel.Tunnel // peerNode → tunnel
|
||||
tMu sync.RWMutex
|
||||
relayMgr *relay.Manager
|
||||
quit chan struct{}
|
||||
wg sync.WaitGroup
|
||||
}
|
||||
|
||||
// New creates a new client.
|
||||
func New(cfg config.ClientConfig) *Client {
|
||||
c := &Client{
|
||||
cfg: cfg,
|
||||
natType: protocol.NATUnknown,
|
||||
tunnels: make(map[string]*tunnel.Tunnel),
|
||||
quit: make(chan struct{}),
|
||||
}
|
||||
|
||||
if cfg.RelayEnabled {
|
||||
c.relayMgr = relay.NewManager(cfg.RelayPort, true, cfg.SuperRelay, cfg.MaxRelayLoad, cfg.Token)
|
||||
}
|
||||
|
||||
return c
|
||||
}
|
||||
|
||||
// Run is the main client loop. Connects, authenticates, and maintains the connection.
|
||||
func (c *Client) Run() error {
|
||||
for {
|
||||
if err := c.connectAndRun(); err != nil {
|
||||
log.Printf("[client] disconnected: %v, reconnecting in 5s...", err)
|
||||
}
|
||||
|
||||
select {
|
||||
case <-c.quit:
|
||||
return nil
|
||||
case <-time.After(5 * time.Second):
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (c *Client) connectAndRun() error {
|
||||
// 1. NAT Detection
|
||||
log.Printf("[client] detecting NAT type via %s...", c.cfg.ServerHost)
|
||||
natResult := nat.Detect(
|
||||
c.cfg.ServerHost,
|
||||
c.cfg.STUNUDP1, c.cfg.STUNUDP2,
|
||||
c.cfg.STUNTCP1, c.cfg.STUNTCP2,
|
||||
)
|
||||
c.natType = natResult.Type
|
||||
c.publicIP = natResult.PublicIP
|
||||
log.Printf("[client] NAT type=%s, publicIP=%s", c.natType, c.publicIP)
|
||||
|
||||
// 2. WSS Connect
|
||||
scheme := "ws"
|
||||
if !c.cfg.Insecure {
|
||||
scheme = "wss"
|
||||
}
|
||||
u := url.URL{Scheme: scheme, Host: fmt.Sprintf("%s:%d", c.cfg.ServerHost, c.cfg.ServerPort), Path: "/ws"}
|
||||
|
||||
dialer := websocket.Dialer{
|
||||
TLSClientConfig: &tls.Config{InsecureSkipVerify: c.cfg.Insecure},
|
||||
}
|
||||
ws, _, err := dialer.Dial(u.String(), nil)
|
||||
if err != nil {
|
||||
return fmt.Errorf("ws connect: %w", err)
|
||||
}
|
||||
|
||||
c.conn = signal.NewConn(ws)
|
||||
defer c.conn.Close()
|
||||
|
||||
// Start ReadLoop in background BEFORE sending login
|
||||
// (so waiter can receive the LoginRsp)
|
||||
readErr := make(chan error, 1)
|
||||
go func() {
|
||||
readErr <- c.conn.ReadLoop()
|
||||
}()
|
||||
|
||||
// 3. Login
|
||||
loginReq := protocol.LoginReq{
|
||||
Node: c.cfg.Node,
|
||||
Token: c.cfg.Token,
|
||||
User: c.cfg.User,
|
||||
Version: config.Version,
|
||||
NATType: c.natType,
|
||||
ShareBandwidth: c.cfg.ShareBandwidth,
|
||||
RelayEnabled: c.cfg.RelayEnabled,
|
||||
SuperRelay: c.cfg.SuperRelay,
|
||||
PublicIP: c.publicIP,
|
||||
}
|
||||
|
||||
rspData, err := c.conn.Request(
|
||||
protocol.MsgLogin, protocol.SubLoginReq, loginReq,
|
||||
protocol.MsgLogin, protocol.SubLoginRsp,
|
||||
10*time.Second,
|
||||
)
|
||||
if err != nil {
|
||||
return fmt.Errorf("login: %w", err)
|
||||
}
|
||||
|
||||
var loginRsp protocol.LoginRsp
|
||||
if err := protocol.DecodePayload(rspData, &loginRsp); err != nil {
|
||||
return fmt.Errorf("decode login rsp: %w", err)
|
||||
}
|
||||
if loginRsp.Error != 0 {
|
||||
return fmt.Errorf("login rejected: %s", loginRsp.Detail)
|
||||
}
|
||||
|
||||
log.Printf("[client] login ok: node=%s, user=%s", loginRsp.Node, loginRsp.User)
|
||||
|
||||
// 4. Send ReportBasic
|
||||
c.sendReportBasic()
|
||||
|
||||
// 5. Register handlers
|
||||
c.registerHandlers()
|
||||
|
||||
// 6. Start heartbeat
|
||||
c.wg.Add(1)
|
||||
go c.heartbeatLoop()
|
||||
|
||||
// 7. Start relay if enabled
|
||||
if c.relayMgr != nil {
|
||||
if err := c.relayMgr.Start(); err != nil {
|
||||
log.Printf("[client] relay start failed: %v", err)
|
||||
}
|
||||
}
|
||||
|
||||
// 8. Auto-run configured apps
|
||||
for _, app := range c.cfg.Apps {
|
||||
if app.Enabled {
|
||||
go c.connectApp(app)
|
||||
}
|
||||
}
|
||||
|
||||
// 9. Wait for disconnect
|
||||
return <-readErr
|
||||
}
|
||||
|
||||
func (c *Client) sendReportBasic() {
|
||||
hostname, _ := os.Hostname()
|
||||
report := protocol.ReportBasic{
|
||||
OS: runtime.GOOS,
|
||||
LanIP: getLocalIP(),
|
||||
Version: config.Version,
|
||||
HasIPv4: 1,
|
||||
}
|
||||
_ = hostname // for future use
|
||||
c.conn.Write(protocol.MsgReport, protocol.SubReportBasic, report)
|
||||
}
|
||||
|
||||
func (c *Client) registerHandlers() {
|
||||
// Handle connection coordination from server
|
||||
c.conn.OnMessage(protocol.MsgPush, protocol.SubPushConnectReq, func(data []byte) error {
|
||||
var req protocol.ConnectReq
|
||||
if err := protocol.DecodePayload(data, &req); err != nil {
|
||||
return err
|
||||
}
|
||||
log.Printf("[client] connect request: %s → %s (punch)", req.From, req.To)
|
||||
go c.handlePunchRequest(req)
|
||||
return nil
|
||||
})
|
||||
|
||||
// Handle peer online notification
|
||||
c.conn.OnMessage(protocol.MsgPush, protocol.SubPushNodeOnline, func(data []byte) error {
|
||||
var msg struct {
|
||||
Node string `json:"node"`
|
||||
}
|
||||
protocol.DecodePayload(data, &msg)
|
||||
log.Printf("[client] peer online: %s, retrying apps", msg.Node)
|
||||
// Retry apps targeting this node
|
||||
for _, app := range c.cfg.Apps {
|
||||
if app.Enabled && app.PeerNode == msg.Node {
|
||||
go c.connectApp(app)
|
||||
}
|
||||
}
|
||||
return nil
|
||||
})
|
||||
|
||||
// Handle edit app push
|
||||
c.conn.OnMessage(protocol.MsgPush, protocol.SubPushEditApp, func(data []byte) error {
|
||||
var app protocol.AppConfig
|
||||
if err := protocol.DecodePayload(data, &app); err != nil {
|
||||
return err
|
||||
}
|
||||
log.Printf("[client] edit app push: %s → %s:%d", app.AppName, app.PeerNode, app.DstPort)
|
||||
go c.connectApp(config.AppConfig{
|
||||
AppName: app.AppName,
|
||||
Protocol: app.Protocol,
|
||||
SrcPort: app.SrcPort,
|
||||
PeerNode: app.PeerNode,
|
||||
DstHost: app.DstHost,
|
||||
DstPort: app.DstPort,
|
||||
Enabled: true,
|
||||
})
|
||||
return nil
|
||||
})
|
||||
|
||||
// Handle relay connect request (when this node acts as relay)
|
||||
if c.relayMgr != nil {
|
||||
c.conn.OnMessage(protocol.MsgPush, protocol.SubPushRelayOffer, func(data []byte) error {
|
||||
var req struct {
|
||||
From string `json:"from"`
|
||||
To string `json:"to"`
|
||||
Token uint64 `json:"token"`
|
||||
}
|
||||
if err := protocol.DecodePayload(data, &req); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// Verify TOTP
|
||||
if !auth.VerifyTOTP(req.Token, c.cfg.Token, time.Now().Unix()) {
|
||||
log.Printf("[client] relay request from %s denied: TOTP mismatch", req.From)
|
||||
return nil
|
||||
}
|
||||
|
||||
log.Printf("[client] accepting relay: %s → %s", req.From, req.To)
|
||||
return nil
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
func (c *Client) heartbeatLoop() {
|
||||
defer c.wg.Done()
|
||||
ticker := time.NewTicker(time.Duration(config.HeartbeatInterval) * time.Second)
|
||||
defer ticker.Stop()
|
||||
|
||||
for {
|
||||
select {
|
||||
case <-ticker.C:
|
||||
if err := c.conn.Write(protocol.MsgHeartbeat, protocol.SubHeartbeatPing, nil); err != nil {
|
||||
log.Printf("[client] heartbeat send failed: %v", err)
|
||||
return
|
||||
}
|
||||
case <-c.quit:
|
||||
return
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// connectApp establishes a tunnel for an app config.
|
||||
func (c *Client) connectApp(app config.AppConfig) {
|
||||
log.Printf("[client] connecting app %s: :%d → %s:%d", app.AppName, app.SrcPort, app.PeerNode, app.DstPort)
|
||||
|
||||
// Check if we already have a tunnel
|
||||
c.tMu.RLock()
|
||||
if t, ok := c.tunnels[app.PeerNode]; ok && t.IsAlive() {
|
||||
c.tMu.RUnlock()
|
||||
// Tunnel exists, just add the port forward
|
||||
if err := t.ListenAndForward(app.Protocol, app.SrcPort, app.DstHost, app.DstPort); err != nil {
|
||||
log.Printf("[client] listen error for %s: %v", app.AppName, err)
|
||||
}
|
||||
return
|
||||
}
|
||||
c.tMu.RUnlock()
|
||||
|
||||
// Request connection coordination from server
|
||||
req := protocol.ConnectReq{
|
||||
From: c.cfg.Node,
|
||||
To: app.PeerNode,
|
||||
Protocol: app.Protocol,
|
||||
SrcPort: app.SrcPort,
|
||||
DstHost: app.DstHost,
|
||||
DstPort: app.DstPort,
|
||||
}
|
||||
|
||||
rspData, err := c.conn.Request(
|
||||
protocol.MsgPush, protocol.SubPushConnectReq, req,
|
||||
protocol.MsgPush, protocol.SubPushConnectRsp,
|
||||
15*time.Second,
|
||||
)
|
||||
if err != nil {
|
||||
log.Printf("[client] connect coordination failed for %s: %v", app.PeerNode, err)
|
||||
c.tryRelay(app)
|
||||
return
|
||||
}
|
||||
|
||||
var rsp protocol.ConnectRsp
|
||||
protocol.DecodePayload(rspData, &rsp)
|
||||
if rsp.Error != 0 {
|
||||
log.Printf("[client] connect denied: %s", rsp.Detail)
|
||||
c.tryRelay(app)
|
||||
return
|
||||
}
|
||||
|
||||
// Attempt punch
|
||||
result := punch.Connect(punch.Config{
|
||||
PeerIP: rsp.Peer.IP,
|
||||
PeerPort: rsp.Peer.Port,
|
||||
PeerNAT: rsp.Peer.NATType,
|
||||
SelfNAT: c.natType,
|
||||
IsInitiator: true,
|
||||
})
|
||||
|
||||
if result.Error != nil {
|
||||
log.Printf("[client] punch failed for %s: %v", app.PeerNode, result.Error)
|
||||
c.tryRelay(app)
|
||||
c.reportConnect(app, protocol.ReportConnect{
|
||||
PeerNode: app.PeerNode, Error: result.Error.Error(),
|
||||
NATType: c.natType, PeerNATType: rsp.Peer.NATType,
|
||||
})
|
||||
return
|
||||
}
|
||||
|
||||
// Punch success — create tunnel
|
||||
t := tunnel.New(app.PeerNode, result.Conn, result.Mode, result.RTT, true)
|
||||
c.tMu.Lock()
|
||||
c.tunnels[app.PeerNode] = t
|
||||
c.tMu.Unlock()
|
||||
|
||||
if err := t.ListenAndForward(app.Protocol, app.SrcPort, app.DstHost, app.DstPort); err != nil {
|
||||
log.Printf("[client] listen error: %v", err)
|
||||
}
|
||||
|
||||
c.reportConnect(app, protocol.ReportConnect{
|
||||
PeerNode: app.PeerNode, LinkMode: result.Mode,
|
||||
RTT: int(result.RTT.Milliseconds()),
|
||||
NATType: c.natType, PeerNATType: rsp.Peer.NATType,
|
||||
})
|
||||
|
||||
log.Printf("[client] tunnel established: %s via %s (rtt=%s)", app.PeerNode, result.Mode, result.RTT)
|
||||
}
|
||||
|
||||
// tryRelay attempts to use a relay node.
|
||||
func (c *Client) tryRelay(app config.AppConfig) {
|
||||
log.Printf("[client] trying relay for %s", app.PeerNode)
|
||||
|
||||
rspData, err := c.conn.Request(
|
||||
protocol.MsgRelay, protocol.SubRelayNodeReq,
|
||||
protocol.RelayNodeReq{PeerNode: app.PeerNode},
|
||||
protocol.MsgRelay, protocol.SubRelayNodeRsp,
|
||||
10*time.Second,
|
||||
)
|
||||
if err != nil {
|
||||
log.Printf("[client] relay request failed: %v", err)
|
||||
return
|
||||
}
|
||||
|
||||
var rsp protocol.RelayNodeRsp
|
||||
protocol.DecodePayload(rspData, &rsp)
|
||||
if rsp.Error != 0 {
|
||||
log.Printf("[client] no relay available for %s", app.PeerNode)
|
||||
return
|
||||
}
|
||||
|
||||
log.Printf("[client] relay via %s (%s mode), connecting...", rsp.RelayName, rsp.Mode)
|
||||
|
||||
// Connect to relay node
|
||||
result := punch.AttemptDirect(punch.Config{
|
||||
PeerIP: rsp.RelayIP,
|
||||
PeerPort: rsp.RelayPort,
|
||||
})
|
||||
if result.Error != nil {
|
||||
log.Printf("[client] relay connect failed: %v", result.Error)
|
||||
return
|
||||
}
|
||||
|
||||
t := tunnel.New(app.PeerNode, result.Conn, "relay-"+rsp.Mode, result.RTT, true)
|
||||
c.tMu.Lock()
|
||||
c.tunnels[app.PeerNode] = t
|
||||
c.tMu.Unlock()
|
||||
|
||||
if err := t.ListenAndForward(app.Protocol, app.SrcPort, app.DstHost, app.DstPort); err != nil {
|
||||
log.Printf("[client] relay listen error: %v", err)
|
||||
}
|
||||
|
||||
c.reportConnect(app, protocol.ReportConnect{
|
||||
PeerNode: app.PeerNode, LinkMode: "relay", RelayNode: rsp.RelayName,
|
||||
})
|
||||
|
||||
log.Printf("[client] relay tunnel established: %s via %s", app.PeerNode, rsp.RelayName)
|
||||
}
|
||||
|
||||
func (c *Client) handlePunchRequest(req protocol.ConnectReq) {
|
||||
log.Printf("[client] handling punch from %s, NAT=%s", req.From, req.Peer.NATType)
|
||||
|
||||
result := punch.Connect(punch.Config{
|
||||
PeerIP: req.Peer.IP,
|
||||
PeerPort: req.Peer.Port,
|
||||
PeerNAT: req.Peer.NATType,
|
||||
SelfNAT: c.natType,
|
||||
IsInitiator: false,
|
||||
})
|
||||
|
||||
rsp := protocol.ConnectRsp{
|
||||
From: c.cfg.Node,
|
||||
To: req.From,
|
||||
}
|
||||
|
||||
if result.Error != nil {
|
||||
rsp.Error = 1
|
||||
rsp.Detail = result.Error.Error()
|
||||
log.Printf("[client] punch from %s failed: %v", req.From, result.Error)
|
||||
} else {
|
||||
rsp.Peer = protocol.PunchParams{
|
||||
IP: c.publicIP,
|
||||
NATType: c.natType,
|
||||
}
|
||||
log.Printf("[client] punch from %s OK via %s", req.From, result.Mode)
|
||||
|
||||
// Create tunnel for the incoming connection
|
||||
t := tunnel.New(req.From, result.Conn, result.Mode, result.RTT, false)
|
||||
c.tMu.Lock()
|
||||
c.tunnels[req.From] = t
|
||||
c.tMu.Unlock()
|
||||
}
|
||||
|
||||
c.conn.Write(protocol.MsgPush, protocol.SubPushConnectRsp, rsp)
|
||||
}
|
||||
|
||||
func (c *Client) reportConnect(app config.AppConfig, rc protocol.ReportConnect) {
|
||||
rc.Protocol = app.Protocol
|
||||
rc.SrcPort = app.SrcPort
|
||||
rc.DstPort = app.DstPort
|
||||
rc.DstHost = app.DstHost
|
||||
rc.Version = config.Version
|
||||
rc.ShareBandwidth = c.cfg.ShareBandwidth
|
||||
c.conn.Write(protocol.MsgReport, protocol.SubReportConnect, rc)
|
||||
}
|
||||
|
||||
// Stop shuts down the client.
|
||||
func (c *Client) Stop() {
|
||||
close(c.quit)
|
||||
if c.conn != nil {
|
||||
c.conn.Close()
|
||||
}
|
||||
if c.relayMgr != nil {
|
||||
c.relayMgr.Stop()
|
||||
}
|
||||
c.tMu.Lock()
|
||||
for _, t := range c.tunnels {
|
||||
t.Close()
|
||||
}
|
||||
c.tMu.Unlock()
|
||||
c.wg.Wait()
|
||||
}
|
||||
|
||||
// ─── helpers ───
|
||||
|
||||
func getLocalIP() string {
|
||||
// Simple heuristic: find the first non-loopback IPv4
|
||||
addrs, _ := os.Hostname()
|
||||
_ = addrs
|
||||
return "0.0.0.0" // placeholder, will be properly implemented
|
||||
}
|
||||
79
internal/client/client_test.go
Normal file
79
internal/client/client_test.go
Normal file
@@ -0,0 +1,79 @@
|
||||
package client
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"log"
|
||||
"net/http"
|
||||
"testing"
|
||||
"time"
|
||||
|
||||
"github.com/openp2p-cn/inp2p/internal/server"
|
||||
"github.com/openp2p-cn/inp2p/pkg/config"
|
||||
"github.com/openp2p-cn/inp2p/pkg/nat"
|
||||
)
|
||||
|
||||
func TestClientLogin(t *testing.T) {
|
||||
// Server
|
||||
sCfg := config.DefaultServerConfig()
|
||||
sCfg.WSPort = 29400
|
||||
sCfg.STUNUDP1 = 29482
|
||||
sCfg.STUNUDP2 = 29484
|
||||
sCfg.STUNTCP1 = 29480
|
||||
sCfg.STUNTCP2 = 29481
|
||||
sCfg.Token = 777
|
||||
|
||||
stunQuit := make(chan struct{})
|
||||
defer close(stunQuit)
|
||||
go nat.ServeUDPSTUN(sCfg.STUNUDP1, stunQuit)
|
||||
go nat.ServeUDPSTUN(sCfg.STUNUDP2, stunQuit)
|
||||
go nat.ServeTCPSTUN(sCfg.STUNTCP1, stunQuit)
|
||||
go nat.ServeTCPSTUN(sCfg.STUNTCP2, stunQuit)
|
||||
|
||||
srv := server.New(sCfg)
|
||||
srv.StartCleanup()
|
||||
mux := http.NewServeMux()
|
||||
mux.HandleFunc("/ws", srv.HandleWS)
|
||||
go http.ListenAndServe(fmt.Sprintf(":%d", sCfg.WSPort), mux)
|
||||
time.Sleep(300 * time.Millisecond)
|
||||
|
||||
// Client
|
||||
cCfg := config.DefaultClientConfig()
|
||||
cCfg.ServerHost = "127.0.0.1"
|
||||
cCfg.ServerPort = 29400
|
||||
cCfg.Node = "testClient"
|
||||
cCfg.Token = 777
|
||||
cCfg.Insecure = true
|
||||
cCfg.RelayEnabled = true
|
||||
cCfg.STUNUDP1 = 29482
|
||||
cCfg.STUNUDP2 = 29484
|
||||
cCfg.STUNTCP1 = 29480
|
||||
cCfg.STUNTCP2 = 29481
|
||||
|
||||
c := New(cCfg)
|
||||
|
||||
// Run in background, should connect within 8 seconds
|
||||
connected := make(chan struct{})
|
||||
go func() {
|
||||
// We'll just let it run for a bit
|
||||
c.Run()
|
||||
}()
|
||||
|
||||
// Wait for login
|
||||
time.Sleep(8 * time.Second)
|
||||
|
||||
nodes := srv.GetOnlineNodes()
|
||||
log.Printf("Online nodes: %d", len(nodes))
|
||||
for _, n := range nodes {
|
||||
log.Printf(" - %s (NAT=%s, relay=%v)", n.Name, n.NATType, n.RelayEnabled)
|
||||
}
|
||||
|
||||
if len(nodes) == 1 && nodes[0].Name == "testClient" {
|
||||
close(connected)
|
||||
log.Println("✅ Client connected successfully!")
|
||||
} else {
|
||||
t.Fatalf("Expected testClient online, got %d nodes", len(nodes))
|
||||
}
|
||||
|
||||
c.Stop()
|
||||
srv.Stop()
|
||||
}
|
||||
137
internal/server/coordinator.go
Normal file
137
internal/server/coordinator.go
Normal file
@@ -0,0 +1,137 @@
|
||||
package server
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"log"
|
||||
"time"
|
||||
|
||||
"github.com/openp2p-cn/inp2p/pkg/protocol"
|
||||
)
|
||||
|
||||
// ConnectCoordinator handles the complete punch coordination flow:
|
||||
// 1. Client A sends ConnectReq to server
|
||||
// 2. Server looks up Client B
|
||||
// 3. Server pushes PunchStart to BOTH A and B simultaneously
|
||||
// 4. Both sides call punch.Connect() at the same time
|
||||
// 5. Success/failure reported back via PunchResult
|
||||
|
||||
// HandleConnectReq processes a connection request from node A to node B.
|
||||
func (s *Server) HandleConnectReq(from *NodeInfo, req protocol.ConnectReq) error {
|
||||
to := s.GetNode(req.To)
|
||||
if to == nil || !to.IsOnline() {
|
||||
// Peer offline — respond with error
|
||||
from.Conn.Write(protocol.MsgPush, protocol.SubPushConnectRsp, protocol.ConnectRsp{
|
||||
Error: 1,
|
||||
Detail: fmt.Sprintf("node %s offline", req.To),
|
||||
From: req.To,
|
||||
To: req.From,
|
||||
})
|
||||
return &NodeOfflineError{Node: req.To}
|
||||
}
|
||||
|
||||
log.Printf("[coord] %s → %s: coordinating punch", from.Name, to.Name)
|
||||
|
||||
// Build punch parameters for both sides
|
||||
from.mu.RLock()
|
||||
fromParams := protocol.PunchParams{
|
||||
IP: from.PublicIP,
|
||||
NATType: from.NATType,
|
||||
HasIPv4: from.HasIPv4,
|
||||
}
|
||||
from.mu.RUnlock()
|
||||
|
||||
to.mu.RLock()
|
||||
toParams := protocol.PunchParams{
|
||||
IP: to.PublicIP,
|
||||
NATType: to.NATType,
|
||||
HasIPv4: to.HasIPv4,
|
||||
}
|
||||
to.mu.RUnlock()
|
||||
|
||||
// Check if punch is possible
|
||||
if !protocol.CanPunch(fromParams.NATType, toParams.NATType) {
|
||||
log.Printf("[coord] %s(%s) ↔ %s(%s): punch impossible, suggesting relay",
|
||||
from.Name, fromParams.NATType, to.Name, toParams.NATType)
|
||||
// Respond to A with B's info but mark that punch is unlikely
|
||||
from.Conn.Write(protocol.MsgPush, protocol.SubPushConnectRsp, protocol.ConnectRsp{
|
||||
Error: 0,
|
||||
From: to.Name,
|
||||
To: from.Name,
|
||||
Peer: toParams,
|
||||
Detail: "punch-unlikely",
|
||||
})
|
||||
return nil
|
||||
}
|
||||
|
||||
// Push PunchStart to BOTH sides simultaneously
|
||||
punchID := fmt.Sprintf("%s-%s-%d", from.Name, to.Name, time.Now().UnixMilli())
|
||||
|
||||
// Tell B about A (so B starts punching toward A)
|
||||
punchToB := protocol.ConnectReq{
|
||||
From: from.Name,
|
||||
To: to.Name,
|
||||
FromIP: from.PublicIP,
|
||||
Peer: fromParams,
|
||||
AppName: req.AppName,
|
||||
Protocol: req.Protocol,
|
||||
SrcPort: req.SrcPort,
|
||||
DstHost: req.DstHost,
|
||||
DstPort: req.DstPort,
|
||||
}
|
||||
if err := to.Conn.Write(protocol.MsgPush, protocol.SubPushConnectReq, punchToB); err != nil {
|
||||
log.Printf("[coord] push to %s failed: %v", to.Name, err)
|
||||
}
|
||||
|
||||
// Tell A about B (so A starts punching toward B)
|
||||
rspToA := protocol.ConnectRsp{
|
||||
Error: 0,
|
||||
From: to.Name,
|
||||
To: from.Name,
|
||||
Peer: toParams,
|
||||
}
|
||||
if err := from.Conn.Write(protocol.MsgPush, protocol.SubPushConnectRsp, rspToA); err != nil {
|
||||
log.Printf("[coord] rsp to %s failed: %v", from.Name, err)
|
||||
}
|
||||
|
||||
log.Printf("[coord] punch started: %s(%s:%s) ↔ %s(%s:%s) id=%s",
|
||||
from.Name, fromParams.IP, fromParams.NATType,
|
||||
to.Name, toParams.IP, toParams.NATType,
|
||||
punchID)
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// HandleEditApp pushes an app configuration to a node, triggering tunnel creation.
|
||||
func (s *Server) HandleEditApp(nodeName string, app protocol.AppConfig) error {
|
||||
node := s.GetNode(nodeName)
|
||||
if node == nil || !node.IsOnline() {
|
||||
return &NodeOfflineError{Node: nodeName}
|
||||
}
|
||||
|
||||
log.Printf("[coord] push EditApp to %s: %s (:%d → %s:%d)",
|
||||
nodeName, app.AppName, app.SrcPort, app.PeerNode, app.DstPort)
|
||||
|
||||
return node.Conn.Write(protocol.MsgPush, protocol.SubPushEditApp, app)
|
||||
}
|
||||
|
||||
// HandleDeleteApp pushes app deletion to a node.
|
||||
func (s *Server) HandleDeleteApp(nodeName string, appName string) error {
|
||||
node := s.GetNode(nodeName)
|
||||
if node == nil || !node.IsOnline() {
|
||||
return &NodeOfflineError{Node: nodeName}
|
||||
}
|
||||
|
||||
return node.Conn.Write(protocol.MsgPush, protocol.SubPushDeleteApp, struct {
|
||||
AppName string `json:"appName"`
|
||||
}{AppName: appName})
|
||||
}
|
||||
|
||||
// HandleReportApps pushes a report-apps request to a node.
|
||||
func (s *Server) HandleReportApps(nodeName string) error {
|
||||
node := s.GetNode(nodeName)
|
||||
if node == nil || !node.IsOnline() {
|
||||
return &NodeOfflineError{Node: nodeName}
|
||||
}
|
||||
|
||||
return node.Conn.Write(protocol.MsgPush, protocol.SubPushReportApps, nil)
|
||||
}
|
||||
406
internal/server/server.go
Normal file
406
internal/server/server.go
Normal file
@@ -0,0 +1,406 @@
|
||||
// Package server implements the inp2ps signaling server.
|
||||
package server
|
||||
|
||||
import (
|
||||
"log"
|
||||
"net/http"
|
||||
"sync"
|
||||
"time"
|
||||
|
||||
"github.com/gorilla/websocket"
|
||||
"github.com/openp2p-cn/inp2p/pkg/auth"
|
||||
"github.com/openp2p-cn/inp2p/pkg/config"
|
||||
"github.com/openp2p-cn/inp2p/pkg/protocol"
|
||||
"github.com/openp2p-cn/inp2p/pkg/signal"
|
||||
)
|
||||
|
||||
// NodeInfo represents a connected client node.
|
||||
type NodeInfo struct {
|
||||
Name string
|
||||
Token uint64
|
||||
User string
|
||||
Version string
|
||||
NATType protocol.NATType
|
||||
PublicIP string
|
||||
LanIP string
|
||||
OS string
|
||||
Mac string
|
||||
ShareBandwidth int
|
||||
RelayEnabled bool
|
||||
SuperRelay bool
|
||||
HasIPv4 int
|
||||
IPv6 string
|
||||
LoginTime time.Time
|
||||
LastHeartbeat time.Time
|
||||
Conn *signal.Conn
|
||||
Apps []protocol.AppConfig
|
||||
mu sync.RWMutex
|
||||
}
|
||||
|
||||
// IsOnline checks if node has sent heartbeat recently.
|
||||
func (n *NodeInfo) IsOnline() bool {
|
||||
n.mu.RLock()
|
||||
defer n.mu.RUnlock()
|
||||
return time.Since(n.LastHeartbeat) < time.Duration(config.HeartbeatTimeout)*time.Second
|
||||
}
|
||||
|
||||
// Server is the INP2P signaling server.
|
||||
type Server struct {
|
||||
cfg config.ServerConfig
|
||||
nodes map[string]*NodeInfo // node name → info
|
||||
mu sync.RWMutex
|
||||
upgrader websocket.Upgrader
|
||||
quit chan struct{}
|
||||
}
|
||||
|
||||
// New creates a new server.
|
||||
func New(cfg config.ServerConfig) *Server {
|
||||
return &Server{
|
||||
cfg: cfg,
|
||||
nodes: make(map[string]*NodeInfo),
|
||||
upgrader: websocket.Upgrader{
|
||||
CheckOrigin: func(r *http.Request) bool { return true },
|
||||
},
|
||||
quit: make(chan struct{}),
|
||||
}
|
||||
}
|
||||
|
||||
// GetNode returns a connected node by name.
|
||||
func (s *Server) GetNode(name string) *NodeInfo {
|
||||
s.mu.RLock()
|
||||
defer s.mu.RUnlock()
|
||||
return s.nodes[name]
|
||||
}
|
||||
|
||||
// GetOnlineNodes returns all online nodes.
|
||||
func (s *Server) GetOnlineNodes() []*NodeInfo {
|
||||
s.mu.RLock()
|
||||
defer s.mu.RUnlock()
|
||||
var out []*NodeInfo
|
||||
for _, n := range s.nodes {
|
||||
if n.IsOnline() {
|
||||
out = append(out, n)
|
||||
}
|
||||
}
|
||||
return out
|
||||
}
|
||||
|
||||
// GetRelayNodes returns nodes that can serve as relay.
|
||||
// Priority: same-user private relay → super relay
|
||||
func (s *Server) GetRelayNodes(forUser string, excludeNodes ...string) []*NodeInfo {
|
||||
excludeSet := make(map[string]bool)
|
||||
for _, n := range excludeNodes {
|
||||
excludeSet[n] = true
|
||||
}
|
||||
|
||||
s.mu.RLock()
|
||||
defer s.mu.RUnlock()
|
||||
|
||||
var privateRelays, superRelays []*NodeInfo
|
||||
for _, n := range s.nodes {
|
||||
if !n.IsOnline() || excludeSet[n.Name] || !n.RelayEnabled {
|
||||
continue
|
||||
}
|
||||
if n.User == forUser {
|
||||
privateRelays = append(privateRelays, n)
|
||||
} else if n.SuperRelay {
|
||||
superRelays = append(superRelays, n)
|
||||
}
|
||||
}
|
||||
// private first, then super
|
||||
return append(privateRelays, superRelays...)
|
||||
}
|
||||
|
||||
// HandleWS is the WebSocket handler for client connections.
|
||||
func (s *Server) HandleWS(w http.ResponseWriter, r *http.Request) {
|
||||
ws, err := s.upgrader.Upgrade(w, r, nil)
|
||||
if err != nil {
|
||||
log.Printf("[server] ws upgrade error: %v", err)
|
||||
return
|
||||
}
|
||||
conn := signal.NewConn(ws)
|
||||
log.Printf("[server] new connection from %s", r.RemoteAddr)
|
||||
|
||||
// First message must be login
|
||||
_, msg, err := ws.ReadMessage()
|
||||
if err != nil {
|
||||
log.Printf("[server] read login error: %v", err)
|
||||
ws.Close()
|
||||
return
|
||||
}
|
||||
|
||||
hdr, err := protocol.DecodeHeader(msg)
|
||||
if err != nil || hdr.MainType != protocol.MsgLogin || hdr.SubType != protocol.SubLoginReq {
|
||||
log.Printf("[server] expected login, got %d:%d", hdr.MainType, hdr.SubType)
|
||||
ws.Close()
|
||||
return
|
||||
}
|
||||
|
||||
var loginReq protocol.LoginReq
|
||||
if err := protocol.DecodePayload(msg, &loginReq); err != nil {
|
||||
log.Printf("[server] decode login: %v", err)
|
||||
ws.Close()
|
||||
return
|
||||
}
|
||||
|
||||
// Verify token
|
||||
if loginReq.Token != s.cfg.Token {
|
||||
log.Printf("[server] login denied: %s (token mismatch)", loginReq.Node)
|
||||
conn.Write(protocol.MsgLogin, protocol.SubLoginRsp, protocol.LoginRsp{
|
||||
Error: 1,
|
||||
Detail: "invalid token",
|
||||
})
|
||||
ws.Close()
|
||||
return
|
||||
}
|
||||
|
||||
// Check duplicate node
|
||||
s.mu.Lock()
|
||||
if old, exists := s.nodes[loginReq.Node]; exists {
|
||||
log.Printf("[server] replacing existing node %s", loginReq.Node)
|
||||
old.Conn.Close()
|
||||
}
|
||||
|
||||
node := &NodeInfo{
|
||||
Name: loginReq.Node,
|
||||
Token: loginReq.Token,
|
||||
User: loginReq.User,
|
||||
Version: loginReq.Version,
|
||||
NATType: loginReq.NATType,
|
||||
ShareBandwidth: loginReq.ShareBandwidth,
|
||||
RelayEnabled: loginReq.RelayEnabled,
|
||||
SuperRelay: loginReq.SuperRelay,
|
||||
PublicIP: r.RemoteAddr, // will be updated by NAT detect
|
||||
LoginTime: time.Now(),
|
||||
LastHeartbeat: time.Now(),
|
||||
Conn: conn,
|
||||
}
|
||||
s.nodes[loginReq.Node] = node
|
||||
s.mu.Unlock()
|
||||
|
||||
// Send login response
|
||||
conn.Write(protocol.MsgLogin, protocol.SubLoginRsp, protocol.LoginRsp{
|
||||
Error: 0,
|
||||
Ts: time.Now().Unix(),
|
||||
Token: loginReq.Token,
|
||||
User: loginReq.User,
|
||||
Node: loginReq.Node,
|
||||
})
|
||||
|
||||
log.Printf("[server] login ok: node=%s, natType=%s, relay=%v, super=%v, version=%s",
|
||||
loginReq.Node, loginReq.NATType, loginReq.RelayEnabled, loginReq.SuperRelay, loginReq.Version)
|
||||
|
||||
// Notify other nodes
|
||||
s.broadcastNodeOnline(loginReq.Node)
|
||||
|
||||
// Register message handlers
|
||||
s.registerHandlers(conn, node)
|
||||
|
||||
// Start read loop (blocks until disconnect)
|
||||
if err := conn.ReadLoop(); err != nil {
|
||||
log.Printf("[server] %s disconnected: %v", loginReq.Node, err)
|
||||
}
|
||||
|
||||
// Cleanup
|
||||
s.mu.Lock()
|
||||
if current, ok := s.nodes[loginReq.Node]; ok && current == node {
|
||||
delete(s.nodes, loginReq.Node)
|
||||
}
|
||||
s.mu.Unlock()
|
||||
log.Printf("[server] %s offline", loginReq.Node)
|
||||
}
|
||||
|
||||
func (s *Server) registerHandlers(conn *signal.Conn, node *NodeInfo) {
|
||||
// Heartbeat
|
||||
conn.OnMessage(protocol.MsgHeartbeat, protocol.SubHeartbeatPing, func(data []byte) error {
|
||||
node.mu.Lock()
|
||||
node.LastHeartbeat = time.Now()
|
||||
node.mu.Unlock()
|
||||
return conn.Write(protocol.MsgHeartbeat, protocol.SubHeartbeatPong, nil)
|
||||
})
|
||||
|
||||
// ReportBasic
|
||||
conn.OnMessage(protocol.MsgReport, protocol.SubReportBasic, func(data []byte) error {
|
||||
var report protocol.ReportBasic
|
||||
if err := protocol.DecodePayload(data, &report); err != nil {
|
||||
return err
|
||||
}
|
||||
node.mu.Lock()
|
||||
node.OS = report.OS
|
||||
node.Mac = report.Mac
|
||||
node.LanIP = report.LanIP
|
||||
node.Version = report.Version
|
||||
node.HasIPv4 = report.HasIPv4
|
||||
node.IPv6 = report.IPv6
|
||||
node.mu.Unlock()
|
||||
log.Printf("[server] ReportBasic from %s: os=%s lanIP=%s", node.Name, report.OS, report.LanIP)
|
||||
|
||||
// Always respond (official OpenP2P bug: not responding causes client to disconnect)
|
||||
return conn.Write(protocol.MsgReport, protocol.SubReportBasic, protocol.ReportBasicRsp{Error: 0})
|
||||
})
|
||||
|
||||
// ReportApps
|
||||
conn.OnMessage(protocol.MsgReport, protocol.SubReportApps, func(data []byte) error {
|
||||
var apps []protocol.AppConfig
|
||||
protocol.DecodePayload(data, &apps)
|
||||
node.mu.Lock()
|
||||
node.Apps = apps
|
||||
node.mu.Unlock()
|
||||
log.Printf("[server] ReportApps from %s: %d apps", node.Name, len(apps))
|
||||
return nil
|
||||
})
|
||||
|
||||
// ReportConnect
|
||||
conn.OnMessage(protocol.MsgReport, protocol.SubReportConnect, func(data []byte) error {
|
||||
var rc protocol.ReportConnect
|
||||
protocol.DecodePayload(data, &rc)
|
||||
if rc.Error != "" {
|
||||
log.Printf("[server] ConnectReport ERROR from %s: peer=%s mode=%s err=%s", node.Name, rc.PeerNode, rc.LinkMode, rc.Error)
|
||||
} else {
|
||||
log.Printf("[server] ConnectReport OK from %s: peer=%s mode=%s rtt=%dms", node.Name, rc.PeerNode, rc.LinkMode, rc.RTT)
|
||||
}
|
||||
return nil
|
||||
})
|
||||
|
||||
// ConnectReq — client wants to connect to a peer
|
||||
conn.OnMessage(protocol.MsgPush, protocol.SubPushConnectReq, func(data []byte) error {
|
||||
var req protocol.ConnectReq
|
||||
protocol.DecodePayload(data, &req)
|
||||
return s.HandleConnectReq(node, req)
|
||||
})
|
||||
|
||||
// RelayNodeReq — client asks for a relay node
|
||||
conn.OnMessage(protocol.MsgRelay, protocol.SubRelayNodeReq, func(data []byte) error {
|
||||
var req protocol.RelayNodeReq
|
||||
protocol.DecodePayload(data, &req)
|
||||
return s.handleRelayNodeReq(conn, node, req)
|
||||
})
|
||||
}
|
||||
|
||||
// handleRelayNodeReq finds and returns the best relay node.
|
||||
func (s *Server) handleRelayNodeReq(conn *signal.Conn, requester *NodeInfo, req protocol.RelayNodeReq) error {
|
||||
relays := s.GetRelayNodes(requester.User, requester.Name, req.PeerNode)
|
||||
|
||||
if len(relays) == 0 {
|
||||
return conn.Write(protocol.MsgRelay, protocol.SubRelayNodeRsp, protocol.RelayNodeRsp{
|
||||
Error: 1,
|
||||
})
|
||||
}
|
||||
|
||||
// Pick the first (best) relay
|
||||
relay := relays[0]
|
||||
totp := auth.GenTOTP(relay.Token, time.Now().Unix())
|
||||
|
||||
mode := "private"
|
||||
if relay.User != requester.User {
|
||||
mode = "super"
|
||||
}
|
||||
|
||||
log.Printf("[server] relay selected: %s (%s) for %s → %s", relay.Name, mode, requester.Name, req.PeerNode)
|
||||
|
||||
return conn.Write(protocol.MsgRelay, protocol.SubRelayNodeRsp, protocol.RelayNodeRsp{
|
||||
RelayName: relay.Name,
|
||||
RelayIP: relay.PublicIP,
|
||||
RelayPort: config.DefaultRelayPort,
|
||||
RelayToken: totp,
|
||||
Mode: mode,
|
||||
Error: 0,
|
||||
})
|
||||
}
|
||||
|
||||
// PushConnect sends a punch coordination message to a peer node.
|
||||
func (s *Server) PushConnect(fromNode *NodeInfo, toNodeName string, app protocol.AppConfig) error {
|
||||
toNode := s.GetNode(toNodeName)
|
||||
if toNode == nil || !toNode.IsOnline() {
|
||||
return &NodeOfflineError{Node: toNodeName}
|
||||
}
|
||||
|
||||
// Push connect request to the destination
|
||||
req := protocol.ConnectReq{
|
||||
From: fromNode.Name,
|
||||
To: toNodeName,
|
||||
FromIP: fromNode.PublicIP,
|
||||
Peer: protocol.PunchParams{
|
||||
IP: fromNode.PublicIP,
|
||||
NATType: fromNode.NATType,
|
||||
HasIPv4: fromNode.HasIPv4,
|
||||
},
|
||||
AppName: app.AppName,
|
||||
Protocol: app.Protocol,
|
||||
SrcPort: app.SrcPort,
|
||||
DstHost: app.DstHost,
|
||||
DstPort: app.DstPort,
|
||||
}
|
||||
|
||||
return toNode.Conn.Write(protocol.MsgPush, protocol.SubPushConnectReq, req)
|
||||
}
|
||||
|
||||
// broadcastNodeOnline notifies interested nodes that a peer came online.
|
||||
func (s *Server) broadcastNodeOnline(nodeName string) {
|
||||
s.mu.RLock()
|
||||
defer s.mu.RUnlock()
|
||||
|
||||
for _, n := range s.nodes {
|
||||
if n.Name == nodeName {
|
||||
continue
|
||||
}
|
||||
// Check if this node has any app targeting the new node
|
||||
n.mu.RLock()
|
||||
interested := false
|
||||
for _, app := range n.Apps {
|
||||
if app.PeerNode == nodeName {
|
||||
interested = true
|
||||
break
|
||||
}
|
||||
}
|
||||
n.mu.RUnlock()
|
||||
|
||||
if interested {
|
||||
n.Conn.Write(protocol.MsgPush, protocol.SubPushNodeOnline, struct {
|
||||
Node string `json:"node"`
|
||||
}{Node: nodeName})
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// StartCleanup periodically removes stale nodes.
|
||||
func (s *Server) StartCleanup() {
|
||||
go func() {
|
||||
ticker := time.NewTicker(30 * time.Second)
|
||||
defer ticker.Stop()
|
||||
for {
|
||||
select {
|
||||
case <-ticker.C:
|
||||
s.mu.Lock()
|
||||
for name, n := range s.nodes {
|
||||
if !n.IsOnline() {
|
||||
log.Printf("[server] cleanup stale node: %s", name)
|
||||
n.Conn.Close()
|
||||
delete(s.nodes, name)
|
||||
}
|
||||
}
|
||||
s.mu.Unlock()
|
||||
case <-s.quit:
|
||||
return
|
||||
}
|
||||
}
|
||||
}()
|
||||
}
|
||||
|
||||
// Stop shuts down the server.
|
||||
func (s *Server) Stop() {
|
||||
close(s.quit)
|
||||
s.mu.Lock()
|
||||
for _, n := range s.nodes {
|
||||
n.Conn.Close()
|
||||
}
|
||||
s.mu.Unlock()
|
||||
}
|
||||
|
||||
type NodeOfflineError struct {
|
||||
Node string
|
||||
}
|
||||
|
||||
func (e *NodeOfflineError) Error() string {
|
||||
return "node offline: " + e.Node
|
||||
}
|
||||
151
internal/server/server_test.go
Normal file
151
internal/server/server_test.go
Normal file
@@ -0,0 +1,151 @@
|
||||
package server
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"log"
|
||||
"net/http"
|
||||
"testing"
|
||||
"time"
|
||||
|
||||
"github.com/openp2p-cn/inp2p/pkg/config"
|
||||
"github.com/openp2p-cn/inp2p/pkg/nat"
|
||||
"github.com/openp2p-cn/inp2p/pkg/protocol"
|
||||
"github.com/openp2p-cn/inp2p/pkg/signal"
|
||||
"github.com/gorilla/websocket"
|
||||
)
|
||||
|
||||
func TestLoginFlow(t *testing.T) {
|
||||
// Start server
|
||||
cfg := config.DefaultServerConfig()
|
||||
cfg.WSPort = 29300
|
||||
cfg.Token = 999
|
||||
|
||||
srv := New(cfg)
|
||||
mux := http.NewServeMux()
|
||||
mux.HandleFunc("/ws", srv.HandleWS)
|
||||
go http.ListenAndServe(fmt.Sprintf(":%d", cfg.WSPort), mux)
|
||||
time.Sleep(200 * time.Millisecond)
|
||||
|
||||
// Connect as client manually
|
||||
ws, _, err := websocket.DefaultDialer.Dial(fmt.Sprintf("ws://127.0.0.1:%d/ws", cfg.WSPort), nil)
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
conn := signal.NewConn(ws)
|
||||
defer conn.Close()
|
||||
|
||||
// Start read loop in background
|
||||
go conn.ReadLoop()
|
||||
|
||||
// Send login
|
||||
loginReq := protocol.LoginReq{
|
||||
Node: "testNode",
|
||||
Token: 999,
|
||||
Version: "test",
|
||||
NATType: protocol.NATCone,
|
||||
}
|
||||
|
||||
rspData, err := conn.Request(
|
||||
protocol.MsgLogin, protocol.SubLoginReq, loginReq,
|
||||
protocol.MsgLogin, protocol.SubLoginRsp,
|
||||
5*time.Second,
|
||||
)
|
||||
if err != nil {
|
||||
t.Fatalf("login request failed: %v", err)
|
||||
}
|
||||
|
||||
var rsp protocol.LoginRsp
|
||||
protocol.DecodePayload(rspData, &rsp)
|
||||
if rsp.Error != 0 {
|
||||
t.Fatalf("login error: %d %s", rsp.Error, rsp.Detail)
|
||||
}
|
||||
log.Printf("Login OK: node=%s", rsp.Node)
|
||||
|
||||
// Verify node is registered
|
||||
time.Sleep(100 * time.Millisecond)
|
||||
nodes := srv.GetOnlineNodes()
|
||||
if len(nodes) != 1 {
|
||||
t.Fatalf("expected 1 node, got %d", len(nodes))
|
||||
}
|
||||
if nodes[0].Name != "testNode" {
|
||||
t.Fatalf("expected testNode, got %s", nodes[0].Name)
|
||||
}
|
||||
|
||||
srv.Stop()
|
||||
}
|
||||
|
||||
func TestTwoClientsWithSTUN(t *testing.T) {
|
||||
cfg := config.DefaultServerConfig()
|
||||
cfg.WSPort = 29301
|
||||
cfg.STUNUDP1 = 29382
|
||||
cfg.STUNUDP2 = 29384
|
||||
cfg.STUNTCP1 = 29380
|
||||
cfg.STUNTCP2 = 29381
|
||||
cfg.Token = 888
|
||||
|
||||
// STUN
|
||||
stunQuit := make(chan struct{})
|
||||
defer close(stunQuit)
|
||||
go nat.ServeUDPSTUN(cfg.STUNUDP1, stunQuit)
|
||||
go nat.ServeUDPSTUN(cfg.STUNUDP2, stunQuit)
|
||||
go nat.ServeTCPSTUN(cfg.STUNTCP1, stunQuit)
|
||||
go nat.ServeTCPSTUN(cfg.STUNTCP2, stunQuit)
|
||||
|
||||
srv := New(cfg)
|
||||
srv.StartCleanup()
|
||||
mux := http.NewServeMux()
|
||||
mux.HandleFunc("/ws", srv.HandleWS)
|
||||
go http.ListenAndServe(fmt.Sprintf(":%d", cfg.WSPort), mux)
|
||||
time.Sleep(300 * time.Millisecond)
|
||||
|
||||
// NAT detect
|
||||
natResult := nat.Detect("127.0.0.1", cfg.STUNUDP1, cfg.STUNUDP2, cfg.STUNTCP1, cfg.STUNTCP2)
|
||||
log.Printf("NAT: type=%s publicIP=%s", natResult.Type, natResult.PublicIP)
|
||||
|
||||
// Client A
|
||||
connectClient := func(name string, relay bool) *signal.Conn {
|
||||
ws, _, err := websocket.DefaultDialer.Dial(fmt.Sprintf("ws://127.0.0.1:%d/ws", cfg.WSPort), nil)
|
||||
if err != nil {
|
||||
t.Fatalf("dial %s: %v", name, err)
|
||||
}
|
||||
conn := signal.NewConn(ws)
|
||||
go conn.ReadLoop()
|
||||
|
||||
rspData, err := conn.Request(
|
||||
protocol.MsgLogin, protocol.SubLoginReq,
|
||||
protocol.LoginReq{Node: name, Token: 888, Version: "test", NATType: natResult.Type, RelayEnabled: relay},
|
||||
protocol.MsgLogin, protocol.SubLoginRsp,
|
||||
5*time.Second,
|
||||
)
|
||||
if err != nil {
|
||||
t.Fatalf("login %s: %v", name, err)
|
||||
}
|
||||
var rsp protocol.LoginRsp
|
||||
protocol.DecodePayload(rspData, &rsp)
|
||||
if rsp.Error != 0 {
|
||||
t.Fatalf("login %s error: %s", name, rsp.Detail)
|
||||
}
|
||||
log.Printf("%s login ok", name)
|
||||
return conn
|
||||
}
|
||||
|
||||
connA := connectClient("nodeA", true)
|
||||
defer connA.Close()
|
||||
connB := connectClient("nodeB", false)
|
||||
defer connB.Close()
|
||||
|
||||
time.Sleep(200 * time.Millisecond)
|
||||
nodes := srv.GetOnlineNodes()
|
||||
if len(nodes) != 2 {
|
||||
t.Fatalf("expected 2 nodes, got %d", len(nodes))
|
||||
}
|
||||
|
||||
// Test relay node discovery
|
||||
relays := srv.GetRelayNodes("", "nodeB")
|
||||
if len(relays) != 1 || relays[0].Name != "nodeA" {
|
||||
t.Fatalf("expected nodeA as relay, got %v", relays)
|
||||
}
|
||||
log.Printf("Relay nodes: %v", relays[0].Name)
|
||||
|
||||
srv.Stop()
|
||||
}
|
||||
92
pkg/auth/auth.go
Normal file
92
pkg/auth/auth.go
Normal file
@@ -0,0 +1,92 @@
|
||||
// Package auth provides TOTP and token authentication for INP2P.
|
||||
package auth
|
||||
|
||||
import (
|
||||
"crypto/hmac"
|
||||
"crypto/sha256"
|
||||
"encoding/binary"
|
||||
"fmt"
|
||||
"hash/crc64"
|
||||
"time"
|
||||
)
|
||||
|
||||
const (
|
||||
// TOTPStep is the time window in seconds for TOTP validity.
|
||||
// A code is valid for ±1 step to allow for clock drift.
|
||||
TOTPStep int64 = 60
|
||||
)
|
||||
|
||||
var crcTable = crc64.MakeTable(crc64.ECMA)
|
||||
|
||||
// MakeToken generates a token from user+password using CRC64.
|
||||
func MakeToken(user, password string) uint64 {
|
||||
return crc64.Checksum([]byte(user+password), crcTable)
|
||||
}
|
||||
|
||||
// GenTOTP generates a TOTP code for relay authentication.
|
||||
func GenTOTP(token uint64, ts int64) uint64 {
|
||||
step := ts / TOTPStep
|
||||
buf := make([]byte, 16)
|
||||
binary.BigEndian.PutUint64(buf[:8], token)
|
||||
binary.BigEndian.PutUint64(buf[8:], uint64(step))
|
||||
|
||||
mac := hmac.New(sha256.New, buf[:8])
|
||||
mac.Write(buf[8:])
|
||||
sum := mac.Sum(nil)
|
||||
|
||||
return binary.BigEndian.Uint64(sum[:8])
|
||||
}
|
||||
|
||||
// VerifyTOTP verifies a TOTP code with ±1 step tolerance.
|
||||
func VerifyTOTP(code uint64, token uint64, ts int64) bool {
|
||||
for delta := int64(-1); delta <= 1; delta++ {
|
||||
expected := GenTOTP(token, ts+delta*TOTPStep)
|
||||
if code == expected {
|
||||
return true
|
||||
}
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
// RelayToken generates a one-time relay token signed by the server.
|
||||
// Used for cross-user super relay authentication.
|
||||
type RelayToken struct {
|
||||
SessionID string `json:"sessionID"`
|
||||
From string `json:"from"`
|
||||
To string `json:"to"`
|
||||
Relay string `json:"relay"`
|
||||
Expires int64 `json:"expires"`
|
||||
Signature []byte `json:"signature"`
|
||||
}
|
||||
|
||||
// SignRelayToken creates a signed one-time relay token.
|
||||
func SignRelayToken(secret []byte, sessionID, from, to, relay string, ttl time.Duration) RelayToken {
|
||||
rt := RelayToken{
|
||||
SessionID: sessionID,
|
||||
From: from,
|
||||
To: to,
|
||||
Relay: relay,
|
||||
Expires: time.Now().Add(ttl).Unix(),
|
||||
}
|
||||
|
||||
msg := fmt.Sprintf("%s:%s:%s:%s:%d", rt.SessionID, rt.From, rt.To, rt.Relay, rt.Expires)
|
||||
mac := hmac.New(sha256.New, secret)
|
||||
mac.Write([]byte(msg))
|
||||
rt.Signature = mac.Sum(nil)
|
||||
|
||||
return rt
|
||||
}
|
||||
|
||||
// VerifyRelayToken validates a signed relay token.
|
||||
func VerifyRelayToken(secret []byte, rt RelayToken) bool {
|
||||
if time.Now().Unix() > rt.Expires {
|
||||
return false
|
||||
}
|
||||
|
||||
msg := fmt.Sprintf("%s:%s:%s:%s:%d", rt.SessionID, rt.From, rt.To, rt.Relay, rt.Expires)
|
||||
mac := hmac.New(sha256.New, secret)
|
||||
mac.Write([]byte(msg))
|
||||
expected := mac.Sum(nil)
|
||||
|
||||
return hmac.Equal(rt.Signature, expected)
|
||||
}
|
||||
161
pkg/config/config.go
Normal file
161
pkg/config/config.go
Normal file
@@ -0,0 +1,161 @@
|
||||
// Package config provides shared configuration types.
|
||||
package config
|
||||
|
||||
import (
|
||||
"crypto/rand"
|
||||
"encoding/hex"
|
||||
"fmt"
|
||||
"os"
|
||||
"strconv"
|
||||
)
|
||||
|
||||
const (
|
||||
Version = "0.1.0"
|
||||
|
||||
DefaultWSPort = 27183 // WSS signaling
|
||||
DefaultSTUNUDP1 = 27182 // UDP STUN port 1
|
||||
DefaultSTUNUDP2 = 27183 // UDP STUN port 2
|
||||
DefaultSTUNTCP1 = 27180 // TCP STUN port 1
|
||||
DefaultSTUNTCP2 = 27181 // TCP STUN port 2
|
||||
DefaultWebPort = 10088 // Web console
|
||||
DefaultAPIPort = 10008 // REST API
|
||||
|
||||
DefaultMaxRelayLoad = 20
|
||||
DefaultRelayPort = 27185
|
||||
|
||||
HeartbeatInterval = 30 // seconds
|
||||
HeartbeatTimeout = 90 // seconds — 3x missed heartbeats → offline
|
||||
)
|
||||
|
||||
// ServerConfig holds inp2ps configuration.
|
||||
type ServerConfig struct {
|
||||
WSPort int `json:"wsPort"`
|
||||
STUNUDP1 int `json:"stunUDP1"`
|
||||
STUNUDP2 int `json:"stunUDP2"`
|
||||
STUNTCP1 int `json:"stunTCP1"`
|
||||
STUNTCP2 int `json:"stunTCP2"`
|
||||
WebPort int `json:"webPort"`
|
||||
APIPort int `json:"apiPort"`
|
||||
DBPath string `json:"dbPath"`
|
||||
CertFile string `json:"certFile"`
|
||||
KeyFile string `json:"keyFile"`
|
||||
LogLevel int `json:"logLevel"` // 0=debug, 1=info, 2=warn, 3=error
|
||||
Token uint64 `json:"token"` // master token for auth
|
||||
JWTKey string `json:"jwtKey"` // auto-generated if empty
|
||||
|
||||
AdminUser string `json:"adminUser"`
|
||||
AdminPass string `json:"adminPass"`
|
||||
}
|
||||
|
||||
func DefaultServerConfig() ServerConfig {
|
||||
return ServerConfig{
|
||||
WSPort: DefaultWSPort,
|
||||
STUNUDP1: DefaultSTUNUDP1,
|
||||
STUNUDP2: DefaultSTUNUDP2,
|
||||
STUNTCP1: DefaultSTUNTCP1,
|
||||
STUNTCP2: DefaultSTUNTCP2,
|
||||
WebPort: DefaultWebPort,
|
||||
APIPort: DefaultAPIPort,
|
||||
DBPath: "inp2ps.db",
|
||||
LogLevel: 1,
|
||||
AdminUser: "admin",
|
||||
AdminPass: "admin123",
|
||||
}
|
||||
}
|
||||
|
||||
func (c *ServerConfig) FillFromEnv() {
|
||||
if v := os.Getenv("INP2PS_WS_PORT"); v != "" {
|
||||
c.WSPort, _ = strconv.Atoi(v)
|
||||
}
|
||||
if v := os.Getenv("INP2PS_WEB_PORT"); v != "" {
|
||||
c.WebPort, _ = strconv.Atoi(v)
|
||||
}
|
||||
if v := os.Getenv("INP2PS_DB_PATH"); v != "" {
|
||||
c.DBPath = v
|
||||
}
|
||||
if v := os.Getenv("INP2PS_TOKEN"); v != "" {
|
||||
c.Token, _ = strconv.ParseUint(v, 10, 64)
|
||||
}
|
||||
if v := os.Getenv("INP2PS_CERT"); v != "" {
|
||||
c.CertFile = v
|
||||
}
|
||||
if v := os.Getenv("INP2PS_KEY"); v != "" {
|
||||
c.KeyFile = v
|
||||
}
|
||||
if c.JWTKey == "" {
|
||||
b := make([]byte, 32)
|
||||
rand.Read(b)
|
||||
c.JWTKey = hex.EncodeToString(b)
|
||||
}
|
||||
}
|
||||
|
||||
func (c *ServerConfig) Validate() error {
|
||||
if c.Token == 0 {
|
||||
return fmt.Errorf("token is required (INP2PS_TOKEN or -token)")
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// ClientConfig holds inp2pc configuration.
|
||||
type ClientConfig struct {
|
||||
ServerHost string `json:"serverHost"`
|
||||
ServerPort int `json:"serverPort"`
|
||||
Node string `json:"node"`
|
||||
Token uint64 `json:"token"`
|
||||
User string `json:"user,omitempty"`
|
||||
Insecure bool `json:"insecure"` // skip TLS verify
|
||||
|
||||
// STUN ports (defaults match server defaults)
|
||||
STUNUDP1 int `json:"stunUDP1,omitempty"`
|
||||
STUNUDP2 int `json:"stunUDP2,omitempty"`
|
||||
STUNTCP1 int `json:"stunTCP1,omitempty"`
|
||||
STUNTCP2 int `json:"stunTCP2,omitempty"`
|
||||
|
||||
RelayEnabled bool `json:"relayEnabled"` // --relay
|
||||
SuperRelay bool `json:"superRelay"` // --super
|
||||
RelayPort int `json:"relayPort"`
|
||||
MaxRelayLoad int `json:"maxRelayLoad"`
|
||||
|
||||
ShareBandwidth int `json:"shareBandwidth"` // Mbps
|
||||
LogLevel int `json:"logLevel"`
|
||||
|
||||
Apps []AppConfig `json:"apps"`
|
||||
}
|
||||
|
||||
type AppConfig struct {
|
||||
AppName string `json:"appName"`
|
||||
Protocol string `json:"protocol"` // tcp, udp
|
||||
SrcPort int `json:"srcPort"`
|
||||
PeerNode string `json:"peerNode"`
|
||||
DstHost string `json:"dstHost"`
|
||||
DstPort int `json:"dstPort"`
|
||||
Enabled bool `json:"enabled"`
|
||||
}
|
||||
|
||||
func DefaultClientConfig() ClientConfig {
|
||||
return ClientConfig{
|
||||
ServerPort: DefaultWSPort,
|
||||
STUNUDP1: DefaultSTUNUDP1,
|
||||
STUNUDP2: DefaultSTUNUDP2,
|
||||
STUNTCP1: DefaultSTUNTCP1,
|
||||
STUNTCP2: DefaultSTUNTCP2,
|
||||
ShareBandwidth: 10,
|
||||
RelayPort: DefaultRelayPort,
|
||||
MaxRelayLoad: DefaultMaxRelayLoad,
|
||||
LogLevel: 1,
|
||||
}
|
||||
}
|
||||
|
||||
func (c *ClientConfig) Validate() error {
|
||||
if c.ServerHost == "" {
|
||||
return fmt.Errorf("serverHost is required")
|
||||
}
|
||||
if c.Token == 0 {
|
||||
return fmt.Errorf("token is required")
|
||||
}
|
||||
if c.Node == "" {
|
||||
hostname, _ := os.Hostname()
|
||||
c.Node = hostname
|
||||
}
|
||||
return nil
|
||||
}
|
||||
487
pkg/mux/mux.go
Normal file
487
pkg/mux/mux.go
Normal file
@@ -0,0 +1,487 @@
|
||||
// Package mux provides stream multiplexing over a single net.Conn.
|
||||
//
|
||||
// Wire format per frame:
|
||||
//
|
||||
// StreamID (4B, big-endian)
|
||||
// Flags (1B)
|
||||
// Length (2B, big-endian, max 65535)
|
||||
// Data (Length bytes)
|
||||
//
|
||||
// Total header = 7 bytes.
|
||||
//
|
||||
// Flags:
|
||||
//
|
||||
// 0x01 SYN — open a new stream
|
||||
// 0x02 FIN — close a stream
|
||||
// 0x04 DATA — payload data
|
||||
// 0x08 PING — keepalive (StreamID=0)
|
||||
// 0x10 PONG — keepalive response (StreamID=0)
|
||||
// 0x20 RST — reset/abort a stream
|
||||
package mux
|
||||
|
||||
import (
|
||||
"encoding/binary"
|
||||
"errors"
|
||||
"fmt"
|
||||
"io"
|
||||
"log"
|
||||
"net"
|
||||
"sync"
|
||||
"sync/atomic"
|
||||
"time"
|
||||
)
|
||||
|
||||
const (
|
||||
headerSize = 7
|
||||
maxPayload = 65535
|
||||
|
||||
FlagSYN byte = 0x01
|
||||
FlagFIN byte = 0x02
|
||||
FlagDATA byte = 0x04
|
||||
FlagPING byte = 0x08
|
||||
FlagPONG byte = 0x10
|
||||
FlagRST byte = 0x20
|
||||
|
||||
defaultWindowSize = 256 * 1024 // 256KB per stream receive buffer
|
||||
pingInterval = 15 * time.Second
|
||||
pingTimeout = 10 * time.Second
|
||||
acceptBacklog = 64
|
||||
)
|
||||
|
||||
var (
|
||||
ErrSessionClosed = errors.New("mux: session closed")
|
||||
ErrStreamClosed = errors.New("mux: stream closed")
|
||||
ErrStreamReset = errors.New("mux: stream reset by peer")
|
||||
ErrTimeout = errors.New("mux: timeout")
|
||||
ErrAcceptBacklog = errors.New("mux: accept backlog full")
|
||||
)
|
||||
|
||||
// ─── Session ───
|
||||
// A Session multiplexes many Streams over a single underlying net.Conn.
|
||||
|
||||
type Session struct {
|
||||
conn net.Conn
|
||||
streams map[uint32]*Stream
|
||||
mu sync.RWMutex
|
||||
nextID uint32 // client uses odd, server uses even
|
||||
isServer bool
|
||||
acceptCh chan *Stream
|
||||
writeMu sync.Mutex // serialize frame writes
|
||||
closed int32
|
||||
quit chan struct{}
|
||||
once sync.Once
|
||||
|
||||
// stats
|
||||
BytesSent int64
|
||||
BytesReceived int64
|
||||
}
|
||||
|
||||
// NewSession wraps a net.Conn as a mux session.
|
||||
// isServer determines stream ID allocation: server=even, client=odd.
|
||||
func NewSession(conn net.Conn, isServer bool) *Session {
|
||||
s := &Session{
|
||||
conn: conn,
|
||||
streams: make(map[uint32]*Stream),
|
||||
acceptCh: make(chan *Stream, acceptBacklog),
|
||||
quit: make(chan struct{}),
|
||||
isServer: isServer,
|
||||
}
|
||||
if isServer {
|
||||
s.nextID = 2
|
||||
} else {
|
||||
s.nextID = 1
|
||||
}
|
||||
go s.readLoop()
|
||||
go s.pingLoop()
|
||||
return s
|
||||
}
|
||||
|
||||
// Open creates a new outbound stream.
|
||||
func (s *Session) Open() (*Stream, error) {
|
||||
if s.IsClosed() {
|
||||
return nil, ErrSessionClosed
|
||||
}
|
||||
|
||||
id := atomic.AddUint32(&s.nextID, 2) - 2 // increment by 2 to keep odd/even
|
||||
st := newStream(id, s)
|
||||
|
||||
s.mu.Lock()
|
||||
s.streams[id] = st
|
||||
s.mu.Unlock()
|
||||
|
||||
// Send SYN
|
||||
if err := s.writeFrame(id, FlagSYN, nil); err != nil {
|
||||
s.mu.Lock()
|
||||
delete(s.streams, id)
|
||||
s.mu.Unlock()
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return st, nil
|
||||
}
|
||||
|
||||
// Accept waits for an inbound stream opened by the remote side.
|
||||
func (s *Session) Accept() (*Stream, error) {
|
||||
select {
|
||||
case st := <-s.acceptCh:
|
||||
return st, nil
|
||||
case <-s.quit:
|
||||
return nil, ErrSessionClosed
|
||||
}
|
||||
}
|
||||
|
||||
// Close shuts down the session and all streams.
|
||||
func (s *Session) Close() error {
|
||||
s.once.Do(func() {
|
||||
atomic.StoreInt32(&s.closed, 1)
|
||||
close(s.quit)
|
||||
|
||||
s.mu.Lock()
|
||||
for _, st := range s.streams {
|
||||
st.closeLocal()
|
||||
}
|
||||
s.streams = make(map[uint32]*Stream)
|
||||
s.mu.Unlock()
|
||||
|
||||
s.conn.Close()
|
||||
})
|
||||
return nil
|
||||
}
|
||||
|
||||
// IsClosed reports if the session is closed.
|
||||
func (s *Session) IsClosed() bool {
|
||||
return atomic.LoadInt32(&s.closed) == 1
|
||||
}
|
||||
|
||||
// NumStreams returns active stream count.
|
||||
func (s *Session) NumStreams() int {
|
||||
s.mu.RLock()
|
||||
defer s.mu.RUnlock()
|
||||
return len(s.streams)
|
||||
}
|
||||
|
||||
// ─── Frame I/O ───
|
||||
|
||||
func (s *Session) writeFrame(streamID uint32, flags byte, data []byte) error {
|
||||
if len(data) > maxPayload {
|
||||
return fmt.Errorf("mux: payload too large: %d > %d", len(data), maxPayload)
|
||||
}
|
||||
|
||||
hdr := make([]byte, headerSize)
|
||||
binary.BigEndian.PutUint32(hdr[0:4], streamID)
|
||||
hdr[4] = flags
|
||||
binary.BigEndian.PutUint16(hdr[5:7], uint16(len(data)))
|
||||
|
||||
s.writeMu.Lock()
|
||||
defer s.writeMu.Unlock()
|
||||
|
||||
s.conn.SetWriteDeadline(time.Now().Add(10 * time.Second))
|
||||
|
||||
if _, err := s.conn.Write(hdr); err != nil {
|
||||
return err
|
||||
}
|
||||
if len(data) > 0 {
|
||||
if _, err := s.conn.Write(data); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
atomic.AddInt64(&s.BytesSent, int64(headerSize+len(data)))
|
||||
return nil
|
||||
}
|
||||
|
||||
func (s *Session) readLoop() {
|
||||
hdr := make([]byte, headerSize)
|
||||
for {
|
||||
if _, err := io.ReadFull(s.conn, hdr); err != nil {
|
||||
if !s.IsClosed() {
|
||||
log.Printf("[mux] read header error: %v", err)
|
||||
}
|
||||
s.Close()
|
||||
return
|
||||
}
|
||||
|
||||
streamID := binary.BigEndian.Uint32(hdr[0:4])
|
||||
flags := hdr[4]
|
||||
length := binary.BigEndian.Uint16(hdr[5:7])
|
||||
|
||||
var data []byte
|
||||
if length > 0 {
|
||||
data = make([]byte, length)
|
||||
if _, err := io.ReadFull(s.conn, data); err != nil {
|
||||
if !s.IsClosed() {
|
||||
log.Printf("[mux] read data error: %v", err)
|
||||
}
|
||||
s.Close()
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
atomic.AddInt64(&s.BytesReceived, int64(headerSize+int(length)))
|
||||
s.handleFrame(streamID, flags, data)
|
||||
}
|
||||
}
|
||||
|
||||
func (s *Session) handleFrame(streamID uint32, flags byte, data []byte) {
|
||||
// Ping/Pong on StreamID 0
|
||||
if flags&FlagPING != 0 {
|
||||
s.writeFrame(0, FlagPONG, nil)
|
||||
return
|
||||
}
|
||||
if flags&FlagPONG != 0 {
|
||||
return // pong received, connection alive
|
||||
}
|
||||
|
||||
// SYN — new inbound stream
|
||||
if flags&FlagSYN != 0 {
|
||||
st := newStream(streamID, s)
|
||||
s.mu.Lock()
|
||||
s.streams[streamID] = st
|
||||
s.mu.Unlock()
|
||||
|
||||
select {
|
||||
case s.acceptCh <- st:
|
||||
default:
|
||||
log.Printf("[mux] accept backlog full, dropping stream %d", streamID)
|
||||
s.writeFrame(streamID, FlagRST, nil)
|
||||
s.mu.Lock()
|
||||
delete(s.streams, streamID)
|
||||
s.mu.Unlock()
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
// Find the stream
|
||||
s.mu.RLock()
|
||||
st, ok := s.streams[streamID]
|
||||
s.mu.RUnlock()
|
||||
|
||||
if !ok {
|
||||
if flags&FlagRST == 0 {
|
||||
s.writeFrame(streamID, FlagRST, nil)
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
// RST
|
||||
if flags&FlagRST != 0 {
|
||||
st.resetByPeer()
|
||||
s.mu.Lock()
|
||||
delete(s.streams, streamID)
|
||||
s.mu.Unlock()
|
||||
return
|
||||
}
|
||||
|
||||
// DATA
|
||||
if flags&FlagDATA != 0 && len(data) > 0 {
|
||||
st.pushData(data)
|
||||
}
|
||||
|
||||
// FIN
|
||||
if flags&FlagFIN != 0 {
|
||||
st.finByPeer()
|
||||
}
|
||||
}
|
||||
|
||||
func (s *Session) removeStream(id uint32) {
|
||||
s.mu.Lock()
|
||||
delete(s.streams, id)
|
||||
s.mu.Unlock()
|
||||
}
|
||||
|
||||
func (s *Session) pingLoop() {
|
||||
ticker := time.NewTicker(pingInterval)
|
||||
defer ticker.Stop()
|
||||
|
||||
for {
|
||||
select {
|
||||
case <-ticker.C:
|
||||
if err := s.writeFrame(0, FlagPING, nil); err != nil {
|
||||
return
|
||||
}
|
||||
case <-s.quit:
|
||||
return
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// ─── Stream ───
|
||||
// A Stream is a virtual connection within a Session, implementing net.Conn.
|
||||
|
||||
type Stream struct {
|
||||
id uint32
|
||||
sess *Session
|
||||
readBuf *ringBuffer
|
||||
readCh chan struct{} // signaled when data arrives
|
||||
closed int32
|
||||
finRecv int32 // remote sent FIN
|
||||
finSent int32 // we sent FIN
|
||||
reset int32
|
||||
mu sync.Mutex
|
||||
}
|
||||
|
||||
func newStream(id uint32, sess *Session) *Stream {
|
||||
return &Stream{
|
||||
id: id,
|
||||
sess: sess,
|
||||
readBuf: newRingBuffer(defaultWindowSize),
|
||||
readCh: make(chan struct{}, 1),
|
||||
}
|
||||
}
|
||||
|
||||
// Read implements io.Reader.
|
||||
func (st *Stream) Read(p []byte) (int, error) {
|
||||
for {
|
||||
if atomic.LoadInt32(&st.reset) == 1 {
|
||||
return 0, ErrStreamReset
|
||||
}
|
||||
|
||||
n := st.readBuf.Read(p)
|
||||
if n > 0 {
|
||||
return n, nil
|
||||
}
|
||||
|
||||
// Buffer empty — check if FIN received
|
||||
if atomic.LoadInt32(&st.finRecv) == 1 {
|
||||
return 0, io.EOF
|
||||
}
|
||||
|
||||
if atomic.LoadInt32(&st.closed) == 1 {
|
||||
return 0, ErrStreamClosed
|
||||
}
|
||||
|
||||
// Wait for data
|
||||
select {
|
||||
case <-st.readCh:
|
||||
case <-st.sess.quit:
|
||||
return 0, ErrSessionClosed
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Write implements io.Writer.
|
||||
func (st *Stream) Write(p []byte) (int, error) {
|
||||
if atomic.LoadInt32(&st.closed) == 1 || atomic.LoadInt32(&st.reset) == 1 {
|
||||
return 0, ErrStreamClosed
|
||||
}
|
||||
|
||||
total := 0
|
||||
for len(p) > 0 {
|
||||
chunk := p
|
||||
if len(chunk) > maxPayload {
|
||||
chunk = p[:maxPayload]
|
||||
}
|
||||
if err := st.sess.writeFrame(st.id, FlagDATA, chunk); err != nil {
|
||||
return total, err
|
||||
}
|
||||
total += len(chunk)
|
||||
p = p[len(chunk):]
|
||||
}
|
||||
return total, nil
|
||||
}
|
||||
|
||||
// Close sends FIN and closes the stream.
|
||||
func (st *Stream) Close() error {
|
||||
if !atomic.CompareAndSwapInt32(&st.closed, 0, 1) {
|
||||
return nil
|
||||
}
|
||||
if atomic.CompareAndSwapInt32(&st.finSent, 0, 1) {
|
||||
st.sess.writeFrame(st.id, FlagFIN, nil)
|
||||
}
|
||||
st.sess.removeStream(st.id)
|
||||
st.notify()
|
||||
return nil
|
||||
}
|
||||
|
||||
// LocalAddr implements net.Conn.
|
||||
func (st *Stream) LocalAddr() net.Addr { return st.sess.conn.LocalAddr() }
|
||||
func (st *Stream) RemoteAddr() net.Addr { return st.sess.conn.RemoteAddr() }
|
||||
func (st *Stream) SetDeadline(t time.Time) error {
|
||||
return nil // TODO: implement per-stream deadlines
|
||||
}
|
||||
func (st *Stream) SetReadDeadline(t time.Time) error { return nil }
|
||||
func (st *Stream) SetWriteDeadline(t time.Time) error { return nil }
|
||||
|
||||
func (st *Stream) pushData(data []byte) {
|
||||
st.readBuf.Write(data)
|
||||
st.notify()
|
||||
}
|
||||
|
||||
func (st *Stream) finByPeer() {
|
||||
atomic.StoreInt32(&st.finRecv, 1)
|
||||
st.notify()
|
||||
}
|
||||
|
||||
func (st *Stream) resetByPeer() {
|
||||
atomic.StoreInt32(&st.reset, 1)
|
||||
atomic.StoreInt32(&st.closed, 1)
|
||||
st.notify()
|
||||
}
|
||||
|
||||
func (st *Stream) closeLocal() {
|
||||
atomic.StoreInt32(&st.closed, 1)
|
||||
st.notify()
|
||||
}
|
||||
|
||||
func (st *Stream) notify() {
|
||||
select {
|
||||
case st.readCh <- struct{}{}:
|
||||
default:
|
||||
}
|
||||
}
|
||||
|
||||
// ─── Ring Buffer ───
|
||||
// Lock-free-ish ring buffer for stream receive data.
|
||||
|
||||
type ringBuffer struct {
|
||||
buf []byte
|
||||
r, w int
|
||||
mu sync.Mutex
|
||||
size int
|
||||
}
|
||||
|
||||
func newRingBuffer(size int) *ringBuffer {
|
||||
return &ringBuffer{
|
||||
buf: make([]byte, size),
|
||||
size: size,
|
||||
}
|
||||
}
|
||||
|
||||
func (rb *ringBuffer) Write(p []byte) int {
|
||||
rb.mu.Lock()
|
||||
defer rb.mu.Unlock()
|
||||
|
||||
n := 0
|
||||
for _, b := range p {
|
||||
next := (rb.w + 1) % rb.size
|
||||
if next == rb.r {
|
||||
break // full
|
||||
}
|
||||
rb.buf[rb.w] = b
|
||||
rb.w = next
|
||||
n++
|
||||
}
|
||||
return n
|
||||
}
|
||||
|
||||
func (rb *ringBuffer) Read(p []byte) int {
|
||||
rb.mu.Lock()
|
||||
defer rb.mu.Unlock()
|
||||
|
||||
n := 0
|
||||
for n < len(p) && rb.r != rb.w {
|
||||
p[n] = rb.buf[rb.r]
|
||||
rb.r = (rb.r + 1) % rb.size
|
||||
n++
|
||||
}
|
||||
return n
|
||||
}
|
||||
|
||||
func (rb *ringBuffer) Len() int {
|
||||
rb.mu.Lock()
|
||||
defer rb.mu.Unlock()
|
||||
if rb.w >= rb.r {
|
||||
return rb.w - rb.r
|
||||
}
|
||||
return rb.size - rb.r + rb.w
|
||||
}
|
||||
266
pkg/mux/mux_test.go
Normal file
266
pkg/mux/mux_test.go
Normal file
@@ -0,0 +1,266 @@
|
||||
package mux
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"io"
|
||||
"net"
|
||||
"sync"
|
||||
"testing"
|
||||
"time"
|
||||
)
|
||||
|
||||
// pipe creates a connected pair of net.Conn using net.Pipe.
|
||||
func pipe() (net.Conn, net.Conn) {
|
||||
return net.Pipe()
|
||||
}
|
||||
|
||||
func TestSessionOpenAccept(t *testing.T) {
|
||||
c1, c2 := pipe()
|
||||
defer c1.Close()
|
||||
defer c2.Close()
|
||||
|
||||
client := NewSession(c1, false)
|
||||
server := NewSession(c2, true)
|
||||
defer client.Close()
|
||||
defer server.Close()
|
||||
|
||||
// Client opens a stream
|
||||
st1, err := client.Open()
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
|
||||
// Server accepts
|
||||
st2, err := server.Accept()
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
|
||||
// Verify stream IDs: client=odd, server would be even
|
||||
if st1.id%2 != 1 {
|
||||
t.Errorf("client stream ID should be odd, got %d", st1.id)
|
||||
}
|
||||
_ = st2 // server accepted stream has client's ID
|
||||
}
|
||||
|
||||
func TestStreamReadWrite(t *testing.T) {
|
||||
c1, c2 := pipe()
|
||||
client := NewSession(c1, false)
|
||||
server := NewSession(c2, true)
|
||||
defer client.Close()
|
||||
defer server.Close()
|
||||
|
||||
st1, _ := client.Open()
|
||||
st2, _ := server.Accept()
|
||||
|
||||
msg := []byte("hello from client to server via mux")
|
||||
|
||||
// Write from client
|
||||
n, err := st1.Write(msg)
|
||||
if err != nil || n != len(msg) {
|
||||
t.Fatalf("write: n=%d err=%v", n, err)
|
||||
}
|
||||
|
||||
// Read on server
|
||||
buf := make([]byte, 1024)
|
||||
n, err = st2.Read(buf)
|
||||
if err != nil || n != len(msg) {
|
||||
t.Fatalf("read: n=%d err=%v", n, err)
|
||||
}
|
||||
if !bytes.Equal(buf[:n], msg) {
|
||||
t.Fatalf("data mismatch: got %q want %q", buf[:n], msg)
|
||||
}
|
||||
|
||||
// Bidirectional: server → client
|
||||
reply := []byte("pong")
|
||||
st2.Write(reply)
|
||||
n, _ = st1.Read(buf)
|
||||
if !bytes.Equal(buf[:n], reply) {
|
||||
t.Fatalf("reply mismatch: got %q want %q", buf[:n], reply)
|
||||
}
|
||||
}
|
||||
|
||||
func TestMultipleStreams(t *testing.T) {
|
||||
c1, c2 := pipe()
|
||||
client := NewSession(c1, false)
|
||||
server := NewSession(c2, true)
|
||||
defer client.Close()
|
||||
defer server.Close()
|
||||
|
||||
const numStreams = 10
|
||||
var wg sync.WaitGroup
|
||||
|
||||
// Client opens N streams concurrently
|
||||
wg.Add(numStreams)
|
||||
for i := 0; i < numStreams; i++ {
|
||||
go func(idx int) {
|
||||
defer wg.Done()
|
||||
st, err := client.Open()
|
||||
if err != nil {
|
||||
t.Errorf("open stream %d: %v", idx, err)
|
||||
return
|
||||
}
|
||||
msg := []byte("stream-data")
|
||||
st.Write(msg)
|
||||
}(i)
|
||||
}
|
||||
|
||||
// Server accepts N streams
|
||||
for i := 0; i < numStreams; i++ {
|
||||
st, err := server.Accept()
|
||||
if err != nil {
|
||||
t.Fatalf("accept stream %d: %v", i, err)
|
||||
}
|
||||
buf := make([]byte, 64)
|
||||
n, _ := st.Read(buf)
|
||||
if string(buf[:n]) != "stream-data" {
|
||||
t.Errorf("stream %d data mismatch", i)
|
||||
}
|
||||
}
|
||||
|
||||
wg.Wait()
|
||||
|
||||
if client.NumStreams() != numStreams {
|
||||
t.Errorf("client streams: got %d want %d", client.NumStreams(), numStreams)
|
||||
}
|
||||
}
|
||||
|
||||
func TestStreamClose(t *testing.T) {
|
||||
c1, c2 := pipe()
|
||||
client := NewSession(c1, false)
|
||||
server := NewSession(c2, true)
|
||||
defer client.Close()
|
||||
defer server.Close()
|
||||
|
||||
st1, _ := client.Open()
|
||||
st2, _ := server.Accept()
|
||||
|
||||
// Write then close
|
||||
st1.Write([]byte("before-close"))
|
||||
st1.Close()
|
||||
|
||||
// Server should read data then get EOF
|
||||
buf := make([]byte, 64)
|
||||
n, _ := st2.Read(buf)
|
||||
if string(buf[:n]) != "before-close" {
|
||||
t.Errorf("unexpected data: %q", buf[:n])
|
||||
}
|
||||
|
||||
// Next read should eventually get EOF (FIN received)
|
||||
time.Sleep(50 * time.Millisecond)
|
||||
_, err := st2.Read(buf)
|
||||
if err != io.EOF {
|
||||
t.Errorf("expected EOF after FIN, got %v", err)
|
||||
}
|
||||
}
|
||||
|
||||
func TestLargePayload(t *testing.T) {
|
||||
c1, c2 := pipe()
|
||||
client := NewSession(c1, false)
|
||||
server := NewSession(c2, true)
|
||||
defer client.Close()
|
||||
defer server.Close()
|
||||
|
||||
st1, _ := client.Open()
|
||||
st2, _ := server.Accept()
|
||||
|
||||
// Write 200KB — larger than maxPayload (65535), should auto-split
|
||||
data := make([]byte, 200*1024)
|
||||
for i := range data {
|
||||
data[i] = byte(i % 256)
|
||||
}
|
||||
|
||||
var wg sync.WaitGroup
|
||||
wg.Add(1)
|
||||
go func() {
|
||||
defer wg.Done()
|
||||
n, err := st1.Write(data)
|
||||
if err != nil {
|
||||
t.Errorf("write large: %v", err)
|
||||
}
|
||||
if n != len(data) {
|
||||
t.Errorf("write large: n=%d want %d", n, len(data))
|
||||
}
|
||||
}()
|
||||
|
||||
// Read all on server
|
||||
received := make([]byte, 0, len(data))
|
||||
buf := make([]byte, 32*1024)
|
||||
for len(received) < len(data) {
|
||||
n, err := st2.Read(buf)
|
||||
if err != nil {
|
||||
t.Fatalf("read at %d: %v", len(received), err)
|
||||
}
|
||||
received = append(received, buf[:n]...)
|
||||
}
|
||||
|
||||
wg.Wait()
|
||||
|
||||
if !bytes.Equal(received, data) {
|
||||
t.Error("large payload data mismatch")
|
||||
}
|
||||
}
|
||||
|
||||
func TestSessionClose(t *testing.T) {
|
||||
c1, c2 := pipe()
|
||||
client := NewSession(c1, false)
|
||||
server := NewSession(c2, true)
|
||||
|
||||
st1, _ := client.Open()
|
||||
server.Accept()
|
||||
|
||||
// Close session
|
||||
client.Close()
|
||||
|
||||
// Stream operations should fail
|
||||
_, err := st1.Write([]byte("x"))
|
||||
if err == nil {
|
||||
t.Error("write after session close should fail")
|
||||
}
|
||||
|
||||
// Server accept should fail
|
||||
time.Sleep(50 * time.Millisecond)
|
||||
server.Close()
|
||||
}
|
||||
|
||||
func TestPingPong(t *testing.T) {
|
||||
c1, c2 := pipe()
|
||||
client := NewSession(c1, false)
|
||||
server := NewSession(c2, true)
|
||||
defer client.Close()
|
||||
defer server.Close()
|
||||
|
||||
// Just verify it doesn't crash — ping/pong runs in background
|
||||
time.Sleep(100 * time.Millisecond)
|
||||
|
||||
if client.IsClosed() || server.IsClosed() {
|
||||
t.Error("sessions should still be alive")
|
||||
}
|
||||
}
|
||||
|
||||
func BenchmarkThroughput(b *testing.B) {
|
||||
c1, c2 := pipe()
|
||||
client := NewSession(c1, false)
|
||||
server := NewSession(c2, true)
|
||||
defer client.Close()
|
||||
defer server.Close()
|
||||
|
||||
st1, _ := client.Open()
|
||||
st2, _ := server.Accept()
|
||||
|
||||
data := make([]byte, 4096)
|
||||
buf := make([]byte, 4096)
|
||||
|
||||
b.SetBytes(int64(len(data)))
|
||||
b.ResetTimer()
|
||||
|
||||
go func() {
|
||||
for i := 0; i < b.N; i++ {
|
||||
st2.Read(buf)
|
||||
}
|
||||
}()
|
||||
|
||||
for i := 0; i < b.N; i++ {
|
||||
st1.Write(data)
|
||||
}
|
||||
}
|
||||
260
pkg/nat/detect.go
Normal file
260
pkg/nat/detect.go
Normal file
@@ -0,0 +1,260 @@
|
||||
// Package nat provides NAT type detection via UDP and TCP STUN.
|
||||
package nat
|
||||
|
||||
import (
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"net"
|
||||
"time"
|
||||
|
||||
"github.com/openp2p-cn/inp2p/pkg/protocol"
|
||||
)
|
||||
|
||||
const (
|
||||
detectTimeout = 5 * time.Second
|
||||
)
|
||||
|
||||
// DetectResult holds the NAT detection outcome.
|
||||
type DetectResult struct {
|
||||
Type protocol.NATType
|
||||
PublicIP string
|
||||
Port1 int // external port seen on STUN server port 1
|
||||
Port2 int // external port seen on STUN server port 2
|
||||
}
|
||||
|
||||
// stunReq is sent to the STUN endpoint.
|
||||
type stunReq struct {
|
||||
ID int `json:"id"`
|
||||
}
|
||||
|
||||
// stunRsp is received from the STUN endpoint.
|
||||
type stunRsp struct {
|
||||
IP string `json:"ip"`
|
||||
Port int `json:"port"`
|
||||
ID int `json:"id"`
|
||||
}
|
||||
|
||||
// DetectUDP sends probes from the same local port to two different server
|
||||
// UDP ports. If both return the same external port → Cone; different → Symmetric.
|
||||
func DetectUDP(serverIP string, port1, port2 int) DetectResult {
|
||||
result := DetectResult{Type: protocol.NATUnknown}
|
||||
|
||||
// Bind a single local UDP port
|
||||
conn, err := net.ListenPacket("udp", ":0")
|
||||
if err != nil {
|
||||
return result
|
||||
}
|
||||
defer conn.Close()
|
||||
|
||||
r1, err1 := probeUDP(conn, serverIP, port1, 1)
|
||||
r2, err2 := probeUDP(conn, serverIP, port2, 2)
|
||||
|
||||
if err1 != nil || err2 != nil {
|
||||
return result // timeout → NATUnknown
|
||||
}
|
||||
|
||||
result.PublicIP = r1.IP
|
||||
result.Port1 = r1.Port
|
||||
result.Port2 = r2.Port
|
||||
|
||||
if r1.Port == r2.Port {
|
||||
result.Type = protocol.NATCone
|
||||
} else {
|
||||
result.Type = protocol.NATSymmetric
|
||||
}
|
||||
|
||||
// Check if public IP equals local IP → no NAT
|
||||
localIP := conn.LocalAddr().(*net.UDPAddr).IP.String()
|
||||
if localIP == r1.IP || r1.IP == "" {
|
||||
// might be public
|
||||
}
|
||||
|
||||
return result
|
||||
}
|
||||
|
||||
func probeUDP(conn net.PacketConn, serverIP string, port, id int) (stunRsp, error) {
|
||||
addr, err := net.ResolveUDPAddr("udp", fmt.Sprintf("%s:%d", serverIP, port))
|
||||
if err != nil {
|
||||
return stunRsp{}, err
|
||||
}
|
||||
|
||||
frame, _ := protocol.Encode(protocol.MsgNAT, protocol.SubNATDetectReq, stunReq{ID: id})
|
||||
|
||||
conn.SetWriteDeadline(time.Now().Add(detectTimeout))
|
||||
if _, err := conn.WriteTo(frame, addr); err != nil {
|
||||
return stunRsp{}, err
|
||||
}
|
||||
|
||||
buf := make([]byte, 1024)
|
||||
conn.SetReadDeadline(time.Now().Add(detectTimeout))
|
||||
n, _, err := conn.ReadFrom(buf)
|
||||
if err != nil {
|
||||
return stunRsp{}, err
|
||||
}
|
||||
|
||||
var rsp stunRsp
|
||||
if n > protocol.HeaderSize {
|
||||
json.Unmarshal(buf[protocol.HeaderSize:n], &rsp)
|
||||
}
|
||||
return rsp, nil
|
||||
}
|
||||
|
||||
// DetectTCP connects to two different TCP ports on the server and compares
|
||||
// the observed external port. This is the fallback when UDP is blocked.
|
||||
func DetectTCP(serverIP string, port1, port2 int) DetectResult {
|
||||
result := DetectResult{Type: protocol.NATUnknown}
|
||||
|
||||
r1, err1 := probeTCP(serverIP, port1, 1)
|
||||
r2, err2 := probeTCP(serverIP, port2, 2)
|
||||
|
||||
if err1 != nil || err2 != nil {
|
||||
return result
|
||||
}
|
||||
|
||||
result.PublicIP = r1.IP
|
||||
result.Port1 = r1.Port
|
||||
result.Port2 = r2.Port
|
||||
|
||||
if r1.Port == r2.Port {
|
||||
result.Type = protocol.NATCone
|
||||
} else {
|
||||
result.Type = protocol.NATSymmetric
|
||||
}
|
||||
return result
|
||||
}
|
||||
|
||||
func probeTCP(serverIP string, port, id int) (stunRsp, error) {
|
||||
conn, err := net.DialTimeout("tcp", fmt.Sprintf("%s:%d", serverIP, port), detectTimeout)
|
||||
if err != nil {
|
||||
return stunRsp{}, err
|
||||
}
|
||||
defer conn.Close()
|
||||
|
||||
frame, _ := protocol.Encode(protocol.MsgNAT, protocol.SubNATDetectReq, stunReq{ID: id})
|
||||
conn.SetWriteDeadline(time.Now().Add(detectTimeout))
|
||||
if _, err := conn.Write(frame); err != nil {
|
||||
return stunRsp{}, err
|
||||
}
|
||||
|
||||
buf := make([]byte, 1024)
|
||||
conn.SetReadDeadline(time.Now().Add(detectTimeout))
|
||||
n, err := conn.Read(buf)
|
||||
if err != nil {
|
||||
return stunRsp{}, err
|
||||
}
|
||||
|
||||
var rsp stunRsp
|
||||
if n > protocol.HeaderSize {
|
||||
json.Unmarshal(buf[protocol.HeaderSize:n], &rsp)
|
||||
}
|
||||
return rsp, nil
|
||||
}
|
||||
|
||||
// Detect runs UDP detection first, falls back to TCP if UDP is blocked.
|
||||
func Detect(serverIP string, udpPort1, udpPort2, tcpPort1, tcpPort2 int) DetectResult {
|
||||
result := DetectUDP(serverIP, udpPort1, udpPort2)
|
||||
if result.Type != protocol.NATUnknown {
|
||||
return result
|
||||
}
|
||||
// UDP blocked, fallback to TCP
|
||||
return DetectTCP(serverIP, tcpPort1, tcpPort2)
|
||||
}
|
||||
|
||||
// ─── Server-side STUN handler ───
|
||||
|
||||
// ServeUDPSTUN listens on a UDP port and echoes back the sender's observed IP:port.
|
||||
func ServeUDPSTUN(port int, quit <-chan struct{}) error {
|
||||
addr, err := net.ResolveUDPAddr("udp", fmt.Sprintf(":%d", port))
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
conn, err := net.ListenUDP("udp", addr)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
defer conn.Close()
|
||||
|
||||
go func() {
|
||||
<-quit
|
||||
conn.Close()
|
||||
}()
|
||||
|
||||
buf := make([]byte, 1024)
|
||||
for {
|
||||
n, remoteAddr, err := conn.ReadFromUDP(buf)
|
||||
if err != nil {
|
||||
select {
|
||||
case <-quit:
|
||||
return nil
|
||||
default:
|
||||
continue
|
||||
}
|
||||
}
|
||||
|
||||
// Parse request
|
||||
var req stunReq
|
||||
if n > protocol.HeaderSize {
|
||||
json.Unmarshal(buf[protocol.HeaderSize:n], &req)
|
||||
}
|
||||
|
||||
// Reply with observed address
|
||||
rsp := stunRsp{
|
||||
IP: remoteAddr.IP.String(),
|
||||
Port: remoteAddr.Port,
|
||||
ID: req.ID,
|
||||
}
|
||||
frame, _ := protocol.Encode(protocol.MsgNAT, protocol.SubNATDetectRsp, rsp)
|
||||
conn.WriteToUDP(frame, remoteAddr)
|
||||
}
|
||||
}
|
||||
|
||||
// ServeTCPSTUN listens on a TCP port. Each connection: read one req, write one rsp with observed addr.
|
||||
func ServeTCPSTUN(port int, quit <-chan struct{}) error {
|
||||
ln, err := net.Listen("tcp", fmt.Sprintf(":%d", port))
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
defer ln.Close()
|
||||
|
||||
go func() {
|
||||
<-quit
|
||||
ln.Close()
|
||||
}()
|
||||
|
||||
for {
|
||||
conn, err := ln.Accept()
|
||||
if err != nil {
|
||||
select {
|
||||
case <-quit:
|
||||
return nil
|
||||
default:
|
||||
continue
|
||||
}
|
||||
}
|
||||
go func(c net.Conn) {
|
||||
defer c.Close()
|
||||
remoteAddr := c.RemoteAddr().(*net.TCPAddr)
|
||||
|
||||
buf := make([]byte, 1024)
|
||||
c.SetReadDeadline(time.Now().Add(10 * time.Second))
|
||||
n, err := c.Read(buf)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
|
||||
var req stunReq
|
||||
if n > protocol.HeaderSize {
|
||||
json.Unmarshal(buf[protocol.HeaderSize:n], &req)
|
||||
}
|
||||
|
||||
rsp := stunRsp{
|
||||
IP: remoteAddr.IP.String(),
|
||||
Port: remoteAddr.Port,
|
||||
ID: req.ID,
|
||||
}
|
||||
frame, _ := protocol.Encode(protocol.MsgNAT, protocol.SubNATDetectRsp, rsp)
|
||||
c.SetWriteDeadline(time.Now().Add(5 * time.Second))
|
||||
c.Write(frame)
|
||||
}(conn)
|
||||
}
|
||||
}
|
||||
276
pkg/protocol/protocol.go
Normal file
276
pkg/protocol/protocol.go
Normal file
@@ -0,0 +1,276 @@
|
||||
// Package protocol defines the INP2P wire protocol.
|
||||
//
|
||||
// Message format: [Header 8B] + [JSON payload]
|
||||
// Header: DataLen(uint32 LE) + MainType(uint16 LE) + SubType(uint16 LE)
|
||||
// DataLen = len(header) + len(payload) = 8 + len(json)
|
||||
package protocol
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"encoding/binary"
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"io"
|
||||
)
|
||||
|
||||
// HeaderSize is the fixed 8-byte message header.
|
||||
const HeaderSize = 8
|
||||
|
||||
// ─── Main message types ───
|
||||
|
||||
const (
|
||||
MsgLogin uint16 = 1
|
||||
MsgHeartbeat uint16 = 2
|
||||
MsgNAT uint16 = 3
|
||||
MsgPush uint16 = 4 // signaling push (punch/relay coordination)
|
||||
MsgRelay uint16 = 5
|
||||
MsgReport uint16 = 6
|
||||
MsgTunnel uint16 = 7 // in-tunnel control messages
|
||||
)
|
||||
|
||||
// ─── Sub types: MsgLogin ───
|
||||
|
||||
const (
|
||||
SubLoginReq uint16 = iota
|
||||
SubLoginRsp
|
||||
)
|
||||
|
||||
// ─── Sub types: MsgHeartbeat ───
|
||||
|
||||
const (
|
||||
SubHeartbeatPing uint16 = iota
|
||||
SubHeartbeatPong
|
||||
)
|
||||
|
||||
// ─── Sub types: MsgNAT ───
|
||||
|
||||
const (
|
||||
SubNATDetectReq uint16 = iota
|
||||
SubNATDetectRsp
|
||||
)
|
||||
|
||||
// ─── Sub types: MsgPush ───
|
||||
|
||||
const (
|
||||
SubPushConnectReq uint16 = iota // "please connect to peer X"
|
||||
SubPushConnectRsp // peer's punch parameters
|
||||
SubPushPunchStart // coordinate simultaneous punch
|
||||
SubPushPunchResult // report punch outcome
|
||||
SubPushRelayOffer // relay node offers to relay
|
||||
SubPushNodeOnline // notify: destination came online
|
||||
SubPushEditApp // add/edit tunnel app
|
||||
SubPushDeleteApp // delete tunnel app
|
||||
SubPushReportApps // request app list
|
||||
)
|
||||
|
||||
// ─── Sub types: MsgRelay ───
|
||||
|
||||
const (
|
||||
SubRelayNodeReq uint16 = iota
|
||||
SubRelayNodeRsp
|
||||
SubRelayDataReq // establish data channel through relay
|
||||
SubRelayDataRsp
|
||||
)
|
||||
|
||||
// ─── Sub types: MsgReport ───
|
||||
|
||||
const (
|
||||
SubReportBasic uint16 = iota // OS, version, MAC, etc.
|
||||
SubReportApps // running tunnels
|
||||
SubReportConnect // connection result
|
||||
)
|
||||
|
||||
// ─── NAT types ───
|
||||
|
||||
type NATType int
|
||||
|
||||
const (
|
||||
NATNone NATType = 0 // public IP, no NAT
|
||||
NATCone NATType = 1 // full/restricted/port-restricted cone
|
||||
NATSymmetric NATType = 2 // symmetric (port changes per dest)
|
||||
NATUnknown NATType = 314 // detection failed / UDP blocked
|
||||
)
|
||||
|
||||
func (n NATType) String() string {
|
||||
switch n {
|
||||
case NATNone:
|
||||
return "None"
|
||||
case NATCone:
|
||||
return "Cone"
|
||||
case NATSymmetric:
|
||||
return "Symmetric"
|
||||
default:
|
||||
return "Unknown"
|
||||
}
|
||||
}
|
||||
|
||||
// CanPunch returns true if at least one side is Cone (or has public IP).
|
||||
func CanPunch(a, b NATType) bool {
|
||||
return a == NATNone || b == NATNone || a == NATCone || b == NATCone
|
||||
}
|
||||
|
||||
// ─── Header ───
|
||||
|
||||
type Header struct {
|
||||
DataLen uint32
|
||||
MainType uint16
|
||||
SubType uint16
|
||||
}
|
||||
|
||||
// ─── Encode / Decode ───
|
||||
|
||||
// Encode packs header + JSON payload into a byte slice.
|
||||
func Encode(mainType, subType uint16, payload interface{}) ([]byte, error) {
|
||||
var jsonData []byte
|
||||
if payload != nil {
|
||||
var err error
|
||||
jsonData, err = json.Marshal(payload)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("marshal payload: %w", err)
|
||||
}
|
||||
}
|
||||
h := Header{
|
||||
DataLen: uint32(HeaderSize + len(jsonData)),
|
||||
MainType: mainType,
|
||||
SubType: subType,
|
||||
}
|
||||
buf := new(bytes.Buffer)
|
||||
buf.Grow(int(h.DataLen))
|
||||
if err := binary.Write(buf, binary.LittleEndian, h); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
buf.Write(jsonData)
|
||||
return buf.Bytes(), nil
|
||||
}
|
||||
|
||||
// DecodeHeader reads the 8-byte header from r.
|
||||
func DecodeHeader(data []byte) (Header, error) {
|
||||
if len(data) < HeaderSize {
|
||||
return Header{}, io.ErrShortBuffer
|
||||
}
|
||||
var h Header
|
||||
err := binary.Read(bytes.NewReader(data[:HeaderSize]), binary.LittleEndian, &h)
|
||||
return h, err
|
||||
}
|
||||
|
||||
// DecodePayload unmarshals the JSON portion after the header.
|
||||
func DecodePayload(data []byte, v interface{}) error {
|
||||
if len(data) <= HeaderSize {
|
||||
return nil // empty payload is valid
|
||||
}
|
||||
return json.Unmarshal(data[HeaderSize:], v)
|
||||
}
|
||||
|
||||
// ─── Common message structs ───
|
||||
|
||||
// LoginReq is sent by client on WSS connect.
|
||||
type LoginReq struct {
|
||||
Node string `json:"node"`
|
||||
Token uint64 `json:"token"`
|
||||
User string `json:"user,omitempty"`
|
||||
Version string `json:"version"`
|
||||
NATType NATType `json:"natType"`
|
||||
ShareBandwidth int `json:"shareBandwidth"`
|
||||
RelayEnabled bool `json:"relayEnabled"` // --relay flag
|
||||
SuperRelay bool `json:"superRelay"` // --super flag
|
||||
PublicIP string `json:"publicIP,omitempty"`
|
||||
}
|
||||
|
||||
type LoginRsp struct {
|
||||
Error int `json:"error"`
|
||||
Detail string `json:"detail,omitempty"`
|
||||
Ts int64 `json:"ts"`
|
||||
Token uint64 `json:"token"`
|
||||
User string `json:"user"`
|
||||
Node string `json:"node"`
|
||||
}
|
||||
|
||||
// ReportBasic is the initial system info report after login.
|
||||
type ReportBasic struct {
|
||||
OS string `json:"os"`
|
||||
Mac string `json:"mac"`
|
||||
LanIP string `json:"lanIP"`
|
||||
Version string `json:"version"`
|
||||
HasIPv4 int `json:"hasIPv4"`
|
||||
HasUPNPorNATPMP int `json:"hasUPNPorNATPMP"`
|
||||
IPv6 string `json:"IPv6,omitempty"`
|
||||
}
|
||||
|
||||
type ReportBasicRsp struct {
|
||||
Error int `json:"error"`
|
||||
}
|
||||
|
||||
// PunchParams carries the information needed for hole-punching.
|
||||
type PunchParams struct {
|
||||
IP string `json:"ip"`
|
||||
Port int `json:"port"`
|
||||
NATType NATType `json:"natType"`
|
||||
Token uint64 `json:"token"` // TOTP for auth
|
||||
IPv6 string `json:"ipv6,omitempty"`
|
||||
HasIPv4 int `json:"hasIPv4"`
|
||||
LinkMode string `json:"linkMode"` // "udp" or "tcp"
|
||||
}
|
||||
|
||||
// ConnectReq is pushed by server to coordinate a connection.
|
||||
type ConnectReq struct {
|
||||
From string `json:"from"`
|
||||
To string `json:"to"`
|
||||
FromIP string `json:"fromIP"`
|
||||
Peer PunchParams `json:"peer"`
|
||||
AppName string `json:"appName,omitempty"`
|
||||
Protocol string `json:"protocol"` // "tcp" or "udp"
|
||||
SrcPort int `json:"srcPort"`
|
||||
DstHost string `json:"dstHost"`
|
||||
DstPort int `json:"dstPort"`
|
||||
}
|
||||
|
||||
type ConnectRsp struct {
|
||||
Error int `json:"error"`
|
||||
Detail string `json:"detail,omitempty"`
|
||||
From string `json:"from"`
|
||||
To string `json:"to"`
|
||||
Peer PunchParams `json:"peer,omitempty"`
|
||||
}
|
||||
|
||||
// RelayNodeReq asks the server for a relay node.
|
||||
type RelayNodeReq struct {
|
||||
PeerNode string `json:"peerNode"`
|
||||
}
|
||||
|
||||
type RelayNodeRsp struct {
|
||||
RelayName string `json:"relayName"`
|
||||
RelayIP string `json:"relayIP"`
|
||||
RelayPort int `json:"relayPort"`
|
||||
RelayToken uint64 `json:"relayToken"`
|
||||
Mode string `json:"mode"` // "private", "super", "server"
|
||||
Error int `json:"error"`
|
||||
}
|
||||
|
||||
// AppConfig defines a tunnel application.
|
||||
type AppConfig struct {
|
||||
AppName string `json:"appName"`
|
||||
Protocol string `json:"protocol"` // "tcp" or "udp"
|
||||
SrcPort int `json:"srcPort"`
|
||||
PeerNode string `json:"peerNode"`
|
||||
DstHost string `json:"dstHost"`
|
||||
DstPort int `json:"dstPort"`
|
||||
Enabled int `json:"enabled"`
|
||||
RelayNode string `json:"relayNode,omitempty"` // force specific relay
|
||||
}
|
||||
|
||||
// ReportConnect is the connection result reported to server.
|
||||
type ReportConnect struct {
|
||||
PeerNode string `json:"peerNode"`
|
||||
NATType NATType `json:"natType"`
|
||||
PeerNATType NATType `json:"peerNatType"`
|
||||
LinkMode string `json:"linkMode"` // "udppunch", "tcppunch", "relay"
|
||||
Error string `json:"error,omitempty"`
|
||||
RTT int `json:"rtt,omitempty"` // milliseconds
|
||||
RelayNode string `json:"relayNode,omitempty"`
|
||||
Protocol string `json:"protocol,omitempty"`
|
||||
SrcPort int `json:"srcPort,omitempty"`
|
||||
DstPort int `json:"dstPort,omitempty"`
|
||||
DstHost string `json:"dstHost,omitempty"`
|
||||
Version string `json:"version,omitempty"`
|
||||
ShareBandwidth int `json:"shareBandWidth,omitempty"`
|
||||
}
|
||||
204
pkg/punch/punch.go
Normal file
204
pkg/punch/punch.go
Normal file
@@ -0,0 +1,204 @@
|
||||
// Package punch implements UDP and TCP hole-punching.
|
||||
package punch
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"log"
|
||||
"net"
|
||||
"time"
|
||||
|
||||
"github.com/openp2p-cn/inp2p/pkg/protocol"
|
||||
)
|
||||
|
||||
const (
|
||||
punchTimeout = 5 * time.Second
|
||||
punchRetries = 5
|
||||
handshakeMagic = "INP2P-PUNCH"
|
||||
handshakeAck = "INP2P-PUNCH-ACK"
|
||||
)
|
||||
|
||||
// Result holds the outcome of a punch attempt.
|
||||
type Result struct {
|
||||
Conn net.Conn
|
||||
Mode string // "udp" or "tcp"
|
||||
RTT time.Duration
|
||||
PeerAddr string
|
||||
Error error
|
||||
}
|
||||
|
||||
// Config for a punch attempt.
|
||||
type Config struct {
|
||||
PeerIP string
|
||||
PeerPort int
|
||||
PeerNAT protocol.NATType
|
||||
SelfNAT protocol.NATType
|
||||
SelfPort int // local port to bind (0 = auto)
|
||||
IsInitiator bool
|
||||
}
|
||||
|
||||
// AttemptUDP tries to establish a UDP connection via hole-punching.
|
||||
// Both sides must call this simultaneously (coordinated by server).
|
||||
func AttemptUDP(cfg Config) Result {
|
||||
if !protocol.CanPunch(cfg.SelfNAT, cfg.PeerNAT) {
|
||||
return Result{Error: fmt.Errorf("cannot UDP punch: self=%s peer=%s", cfg.SelfNAT, cfg.PeerNAT)}
|
||||
}
|
||||
|
||||
localAddr := &net.UDPAddr{Port: cfg.SelfPort}
|
||||
conn, err := net.ListenUDP("udp", localAddr)
|
||||
if err != nil {
|
||||
return Result{Error: fmt.Errorf("listen UDP: %w", err)}
|
||||
}
|
||||
|
||||
peerAddr := &net.UDPAddr{
|
||||
IP: net.ParseIP(cfg.PeerIP),
|
||||
Port: cfg.PeerPort,
|
||||
}
|
||||
|
||||
start := time.Now()
|
||||
|
||||
// Send punch packets
|
||||
for i := 0; i < punchRetries; i++ {
|
||||
conn.SetWriteDeadline(time.Now().Add(time.Second))
|
||||
conn.WriteTo([]byte(handshakeMagic), peerAddr)
|
||||
time.Sleep(200 * time.Millisecond)
|
||||
}
|
||||
|
||||
// Listen for response
|
||||
buf := make([]byte, 256)
|
||||
conn.SetReadDeadline(time.Now().Add(punchTimeout))
|
||||
n, from, err := conn.ReadFromUDP(buf)
|
||||
if err != nil {
|
||||
conn.Close()
|
||||
return Result{Error: fmt.Errorf("UDP punch timeout: %w", err)}
|
||||
}
|
||||
|
||||
// Verify handshake
|
||||
msg := string(buf[:n])
|
||||
if msg != handshakeMagic && msg != handshakeAck {
|
||||
conn.Close()
|
||||
return Result{Error: fmt.Errorf("unexpected punch data: %q", msg)}
|
||||
}
|
||||
|
||||
// Send ack
|
||||
conn.WriteTo([]byte(handshakeAck), from)
|
||||
|
||||
rtt := time.Since(start)
|
||||
log.Printf("[punch] UDP punch ok: peer=%s rtt=%s", from, rtt)
|
||||
|
||||
return Result{
|
||||
Conn: conn,
|
||||
Mode: "udp",
|
||||
RTT: rtt,
|
||||
PeerAddr: from.String(),
|
||||
}
|
||||
}
|
||||
|
||||
// AttemptTCP tries TCP hole-punching using simultaneous SYN.
|
||||
// This works by having both sides dial each other at the same time.
|
||||
func AttemptTCP(cfg Config) Result {
|
||||
if !protocol.CanPunch(cfg.SelfNAT, cfg.PeerNAT) {
|
||||
return Result{Error: fmt.Errorf("cannot TCP punch: self=%s peer=%s", cfg.SelfNAT, cfg.PeerNAT)}
|
||||
}
|
||||
|
||||
peerAddr := fmt.Sprintf("%s:%d", cfg.PeerIP, cfg.PeerPort)
|
||||
start := time.Now()
|
||||
|
||||
// TCP simultaneous open: keep trying to dial the peer
|
||||
var conn net.Conn
|
||||
var err error
|
||||
for i := 0; i < punchRetries*2; i++ {
|
||||
d := net.Dialer{Timeout: time.Second, LocalAddr: &net.TCPAddr{Port: cfg.SelfPort}}
|
||||
conn, err = d.Dial("tcp", peerAddr)
|
||||
if err == nil {
|
||||
break
|
||||
}
|
||||
time.Sleep(300 * time.Millisecond)
|
||||
}
|
||||
|
||||
if err != nil {
|
||||
return Result{Error: fmt.Errorf("TCP punch failed: %w", err)}
|
||||
}
|
||||
|
||||
// TCP handshake for INP2P
|
||||
conn.SetWriteDeadline(time.Now().Add(5 * time.Second))
|
||||
conn.Write([]byte(handshakeMagic))
|
||||
|
||||
buf := make([]byte, 256)
|
||||
conn.SetReadDeadline(time.Now().Add(5 * time.Second))
|
||||
n, err := conn.Read(buf)
|
||||
if err != nil {
|
||||
conn.Close()
|
||||
return Result{Error: fmt.Errorf("TCP handshake read: %w", err)}
|
||||
}
|
||||
|
||||
msg := string(buf[:n])
|
||||
if msg != handshakeMagic && msg != handshakeAck {
|
||||
conn.Close()
|
||||
return Result{Error: fmt.Errorf("TCP unexpected handshake: %q", msg)}
|
||||
}
|
||||
|
||||
conn.SetWriteDeadline(time.Now().Add(5 * time.Second))
|
||||
conn.Write([]byte(handshakeAck))
|
||||
|
||||
rtt := time.Since(start)
|
||||
log.Printf("[punch] TCP punch ok: peer=%s rtt=%s", conn.RemoteAddr(), rtt)
|
||||
|
||||
return Result{
|
||||
Conn: conn,
|
||||
Mode: "tcp",
|
||||
RTT: rtt,
|
||||
PeerAddr: conn.RemoteAddr().String(),
|
||||
}
|
||||
}
|
||||
|
||||
// AttemptDirect tries to directly connect when one side has a public IP.
|
||||
func AttemptDirect(cfg Config) Result {
|
||||
addr := fmt.Sprintf("%s:%d", cfg.PeerIP, cfg.PeerPort)
|
||||
start := time.Now()
|
||||
|
||||
conn, err := net.DialTimeout("tcp", addr, punchTimeout)
|
||||
if err != nil {
|
||||
return Result{Error: fmt.Errorf("direct connect failed: %w", err)}
|
||||
}
|
||||
|
||||
rtt := time.Since(start)
|
||||
log.Printf("[punch] direct connect ok: peer=%s rtt=%s", addr, rtt)
|
||||
|
||||
return Result{
|
||||
Conn: conn,
|
||||
Mode: "tcp-direct",
|
||||
RTT: rtt,
|
||||
PeerAddr: addr,
|
||||
}
|
||||
}
|
||||
|
||||
// Connect tries all punch methods in priority order and returns the first success.
|
||||
func Connect(cfg Config) Result {
|
||||
methods := []struct {
|
||||
name string
|
||||
fn func(Config) Result
|
||||
}{
|
||||
{"UDP-punch", AttemptUDP},
|
||||
{"TCP-punch", AttemptTCP},
|
||||
}
|
||||
|
||||
// If peer has public IP, try direct first
|
||||
if cfg.PeerNAT == protocol.NATNone {
|
||||
r := AttemptDirect(cfg)
|
||||
if r.Error == nil {
|
||||
return r
|
||||
}
|
||||
log.Printf("[punch] direct failed: %v", r.Error)
|
||||
}
|
||||
|
||||
for _, m := range methods {
|
||||
log.Printf("[punch] trying %s to %s:%d", m.name, cfg.PeerIP, cfg.PeerPort)
|
||||
r := m.fn(cfg)
|
||||
if r.Error == nil {
|
||||
return r
|
||||
}
|
||||
log.Printf("[punch] %s failed: %v", m.name, r.Error)
|
||||
}
|
||||
|
||||
return Result{Error: fmt.Errorf("all punch methods exhausted")}
|
||||
}
|
||||
415
pkg/relay/relay.go
Normal file
415
pkg/relay/relay.go
Normal file
@@ -0,0 +1,415 @@
|
||||
// Package relay implements relay/super-relay node capabilities.
|
||||
//
|
||||
// Relay flow:
|
||||
// 1. Client A asks server for relay (RelayNodeReq)
|
||||
// 2. Server finds relay R, generates TOTP/token, responds to A (RelayNodeRsp)
|
||||
// 3. Server pushes RelayOffer to R with session info
|
||||
// 4. A connects to R:relayPort, sends RelayHandshake{SessionID, Role="from", Token}
|
||||
// 5. B connects to R:relayPort, sends RelayHandshake{SessionID, Role="to", Token}
|
||||
// (B gets the session info via server push)
|
||||
// 6. R verifies both tokens, bridges A↔B
|
||||
package relay
|
||||
|
||||
import (
|
||||
"encoding/binary"
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"io"
|
||||
"log"
|
||||
"net"
|
||||
"sync"
|
||||
"sync/atomic"
|
||||
"time"
|
||||
|
||||
"github.com/openp2p-cn/inp2p/pkg/auth"
|
||||
)
|
||||
|
||||
const (
|
||||
handshakeTimeout = 10 * time.Second
|
||||
pairTimeout = 30 * time.Second // how long to wait for the second peer
|
||||
headerLen = 4 // uint32 LE length prefix for handshake JSON
|
||||
)
|
||||
|
||||
// RelayHandshake is sent by each peer when connecting to a relay node.
|
||||
type RelayHandshake struct {
|
||||
SessionID string `json:"sessionID"`
|
||||
Role string `json:"role"` // "from" or "to"
|
||||
Token uint64 `json:"token"` // TOTP or one-time token
|
||||
Node string `json:"node"` // sender's node name
|
||||
}
|
||||
|
||||
// Node represents a relay-capable node's metadata (used by server).
|
||||
type Node struct {
|
||||
Name string
|
||||
IP string
|
||||
Port int
|
||||
Token uint64
|
||||
Mode string // "private" (same user), "super" (shared)
|
||||
Bandwidth int
|
||||
LastUsed time.Time
|
||||
ActiveLoad int32
|
||||
}
|
||||
|
||||
// pendingSession waits for both peers to arrive.
|
||||
type pendingSession struct {
|
||||
id string
|
||||
from string
|
||||
to string
|
||||
token uint64
|
||||
connFrom net.Conn
|
||||
connTo net.Conn
|
||||
mu sync.Mutex
|
||||
done chan struct{}
|
||||
created time.Time
|
||||
}
|
||||
|
||||
// Manager manages relay sessions on this node.
|
||||
type Manager struct {
|
||||
enabled bool
|
||||
superRelay bool
|
||||
maxLoad int
|
||||
token uint64 // this node's auth token
|
||||
port int
|
||||
listener net.Listener
|
||||
|
||||
pending map[string]*pendingSession // sessionID → pending
|
||||
pMu sync.Mutex
|
||||
sessions map[string]*Session // sessionID → active session
|
||||
sMu sync.RWMutex
|
||||
quit chan struct{}
|
||||
}
|
||||
|
||||
// Session represents an active relay bridging two peers.
|
||||
type Session struct {
|
||||
ID string
|
||||
From string
|
||||
To string
|
||||
ConnA net.Conn
|
||||
ConnB net.Conn
|
||||
BytesFwd int64
|
||||
StartTime time.Time
|
||||
closed int32
|
||||
}
|
||||
|
||||
// NewManager creates a relay manager.
|
||||
func NewManager(port int, enabled, superRelay bool, maxLoad int, token uint64) *Manager {
|
||||
return &Manager{
|
||||
enabled: enabled,
|
||||
superRelay: superRelay,
|
||||
maxLoad: maxLoad,
|
||||
token: token,
|
||||
port: port,
|
||||
pending: make(map[string]*pendingSession),
|
||||
sessions: make(map[string]*Session),
|
||||
quit: make(chan struct{}),
|
||||
}
|
||||
}
|
||||
|
||||
func (m *Manager) IsEnabled() bool { return m.enabled }
|
||||
func (m *Manager) IsSuperRelay() bool { return m.superRelay }
|
||||
|
||||
func (m *Manager) ActiveSessions() int {
|
||||
m.sMu.RLock()
|
||||
defer m.sMu.RUnlock()
|
||||
return len(m.sessions)
|
||||
}
|
||||
|
||||
func (m *Manager) CanAcceptRelay() bool {
|
||||
return m.enabled && m.ActiveSessions() < m.maxLoad
|
||||
}
|
||||
|
||||
// Start begins listening for relay connections.
|
||||
func (m *Manager) Start() error {
|
||||
if !m.enabled {
|
||||
return nil
|
||||
}
|
||||
ln, err := net.Listen("tcp", fmt.Sprintf(":%d", m.port))
|
||||
if err != nil {
|
||||
return fmt.Errorf("relay listen :%d: %w", m.port, err)
|
||||
}
|
||||
m.listener = ln
|
||||
log.Printf("[relay] listening on :%d (super=%v, maxLoad=%d)", m.port, m.superRelay, m.maxLoad)
|
||||
|
||||
go m.acceptLoop()
|
||||
go m.cleanupLoop()
|
||||
return nil
|
||||
}
|
||||
|
||||
func (m *Manager) acceptLoop() {
|
||||
for {
|
||||
conn, err := m.listener.Accept()
|
||||
if err != nil {
|
||||
select {
|
||||
case <-m.quit:
|
||||
return
|
||||
default:
|
||||
continue
|
||||
}
|
||||
}
|
||||
go m.handleConn(conn)
|
||||
}
|
||||
}
|
||||
|
||||
func (m *Manager) handleConn(conn net.Conn) {
|
||||
// Read handshake with timeout
|
||||
conn.SetReadDeadline(time.Now().Add(handshakeTimeout))
|
||||
|
||||
// Length-prefixed JSON: [4B len][JSON]
|
||||
var length uint32
|
||||
if err := binary.Read(conn, binary.LittleEndian, &length); err != nil {
|
||||
log.Printf("[relay] handshake read len: %v", err)
|
||||
conn.Close()
|
||||
return
|
||||
}
|
||||
if length > 4096 {
|
||||
log.Printf("[relay] handshake too large: %d", length)
|
||||
conn.Close()
|
||||
return
|
||||
}
|
||||
|
||||
buf := make([]byte, length)
|
||||
if _, err := io.ReadFull(conn, buf); err != nil {
|
||||
log.Printf("[relay] handshake read body: %v", err)
|
||||
conn.Close()
|
||||
return
|
||||
}
|
||||
conn.SetReadDeadline(time.Time{}) // clear deadline
|
||||
|
||||
var hs RelayHandshake
|
||||
if err := json.Unmarshal(buf, &hs); err != nil {
|
||||
log.Printf("[relay] handshake parse: %v", err)
|
||||
conn.Close()
|
||||
return
|
||||
}
|
||||
|
||||
// Verify TOTP
|
||||
if !auth.VerifyTOTP(hs.Token, m.token, time.Now().Unix()) {
|
||||
log.Printf("[relay] handshake denied: %s (TOTP mismatch)", hs.Node)
|
||||
sendRelayResult(conn, 1, "auth failed")
|
||||
conn.Close()
|
||||
return
|
||||
}
|
||||
|
||||
log.Printf("[relay] handshake ok: session=%s role=%s node=%s", hs.SessionID, hs.Role, hs.Node)
|
||||
|
||||
// Find or create pending session
|
||||
m.pMu.Lock()
|
||||
ps, exists := m.pending[hs.SessionID]
|
||||
if !exists {
|
||||
ps = &pendingSession{
|
||||
id: hs.SessionID,
|
||||
token: hs.Token,
|
||||
done: make(chan struct{}),
|
||||
created: time.Now(),
|
||||
}
|
||||
m.pending[hs.SessionID] = ps
|
||||
}
|
||||
m.pMu.Unlock()
|
||||
|
||||
ps.mu.Lock()
|
||||
switch hs.Role {
|
||||
case "from":
|
||||
ps.from = hs.Node
|
||||
ps.connFrom = conn
|
||||
case "to":
|
||||
ps.to = hs.Node
|
||||
ps.connTo = conn
|
||||
default:
|
||||
ps.mu.Unlock()
|
||||
log.Printf("[relay] unknown role: %s", hs.Role)
|
||||
conn.Close()
|
||||
return
|
||||
}
|
||||
|
||||
// Check if both peers have arrived
|
||||
bothReady := ps.connFrom != nil && ps.connTo != nil
|
||||
ps.mu.Unlock()
|
||||
|
||||
if bothReady {
|
||||
// Both peers connected — bridge them
|
||||
m.pMu.Lock()
|
||||
delete(m.pending, hs.SessionID)
|
||||
m.pMu.Unlock()
|
||||
|
||||
sendRelayResult(ps.connFrom, 0, "ok")
|
||||
sendRelayResult(ps.connTo, 0, "ok")
|
||||
|
||||
m.bridge(ps)
|
||||
} else {
|
||||
// Wait for the other peer
|
||||
select {
|
||||
case <-ps.done:
|
||||
// Woken up by the other peer's arrival
|
||||
case <-time.After(pairTimeout):
|
||||
log.Printf("[relay] session %s timeout waiting for pair", hs.SessionID)
|
||||
m.pMu.Lock()
|
||||
delete(m.pending, hs.SessionID)
|
||||
m.pMu.Unlock()
|
||||
sendRelayResult(conn, 1, "pair timeout")
|
||||
conn.Close()
|
||||
case <-m.quit:
|
||||
conn.Close()
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// relayResult is sent back to each peer after handshake.
|
||||
type relayResult struct {
|
||||
Error int `json:"error"`
|
||||
Detail string `json:"detail,omitempty"`
|
||||
}
|
||||
|
||||
func sendRelayResult(conn net.Conn, errCode int, detail string) {
|
||||
data, _ := json.Marshal(relayResult{Error: errCode, Detail: detail})
|
||||
length := uint32(len(data))
|
||||
conn.SetWriteDeadline(time.Now().Add(5 * time.Second))
|
||||
binary.Write(conn, binary.LittleEndian, length)
|
||||
conn.Write(data)
|
||||
conn.SetWriteDeadline(time.Time{})
|
||||
}
|
||||
|
||||
func (m *Manager) bridge(ps *pendingSession) {
|
||||
sess := &Session{
|
||||
ID: ps.id,
|
||||
From: ps.from,
|
||||
To: ps.to,
|
||||
ConnA: ps.connFrom,
|
||||
ConnB: ps.connTo,
|
||||
StartTime: time.Now(),
|
||||
}
|
||||
|
||||
m.sMu.Lock()
|
||||
m.sessions[ps.id] = sess
|
||||
m.sMu.Unlock()
|
||||
|
||||
log.Printf("[relay] bridging %s ↔ %s (session %s)", ps.from, ps.to, ps.id)
|
||||
|
||||
go func() {
|
||||
defer func() {
|
||||
sess.Close()
|
||||
m.sMu.Lock()
|
||||
delete(m.sessions, ps.id)
|
||||
m.sMu.Unlock()
|
||||
log.Printf("[relay] session %s ended, %d bytes forwarded", ps.id, atomic.LoadInt64(&sess.BytesFwd))
|
||||
}()
|
||||
|
||||
var wg sync.WaitGroup
|
||||
wg.Add(2)
|
||||
|
||||
go func() {
|
||||
defer wg.Done()
|
||||
n, _ := io.Copy(sess.ConnB, sess.ConnA)
|
||||
atomic.AddInt64(&sess.BytesFwd, n)
|
||||
}()
|
||||
go func() {
|
||||
defer wg.Done()
|
||||
n, _ := io.Copy(sess.ConnA, sess.ConnB)
|
||||
atomic.AddInt64(&sess.BytesFwd, n)
|
||||
}()
|
||||
|
||||
wg.Wait()
|
||||
}()
|
||||
}
|
||||
|
||||
func (m *Manager) cleanupLoop() {
|
||||
ticker := time.NewTicker(30 * time.Second)
|
||||
defer ticker.Stop()
|
||||
for {
|
||||
select {
|
||||
case <-ticker.C:
|
||||
m.pMu.Lock()
|
||||
for id, ps := range m.pending {
|
||||
if time.Since(ps.created) > pairTimeout {
|
||||
delete(m.pending, id)
|
||||
if ps.connFrom != nil {
|
||||
ps.connFrom.Close()
|
||||
}
|
||||
if ps.connTo != nil {
|
||||
ps.connTo.Close()
|
||||
}
|
||||
}
|
||||
}
|
||||
m.pMu.Unlock()
|
||||
case <-m.quit:
|
||||
return
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Close shuts down a session.
|
||||
func (s *Session) Close() {
|
||||
if !atomic.CompareAndSwapInt32(&s.closed, 0, 1) {
|
||||
return
|
||||
}
|
||||
if s.ConnA != nil {
|
||||
s.ConnA.Close()
|
||||
}
|
||||
if s.ConnB != nil {
|
||||
s.ConnB.Close()
|
||||
}
|
||||
}
|
||||
|
||||
// Stop shuts down the relay manager.
|
||||
func (m *Manager) Stop() {
|
||||
close(m.quit)
|
||||
if m.listener != nil {
|
||||
m.listener.Close()
|
||||
}
|
||||
m.sMu.Lock()
|
||||
for _, s := range m.sessions {
|
||||
s.Close()
|
||||
}
|
||||
m.sMu.Unlock()
|
||||
}
|
||||
|
||||
// ─── Client-side helper ───
|
||||
|
||||
// ConnectToRelay connects to a relay node and performs the handshake.
|
||||
func ConnectToRelay(relayAddr string, sessionID, role, node string, token uint64) (net.Conn, error) {
|
||||
conn, err := net.DialTimeout("tcp", relayAddr, 10*time.Second)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("dial relay %s: %w", relayAddr, err)
|
||||
}
|
||||
|
||||
hs := RelayHandshake{
|
||||
SessionID: sessionID,
|
||||
Role: role,
|
||||
Token: token,
|
||||
Node: node,
|
||||
}
|
||||
data, _ := json.Marshal(hs)
|
||||
|
||||
conn.SetWriteDeadline(time.Now().Add(5 * time.Second))
|
||||
length := uint32(len(data))
|
||||
if err := binary.Write(conn, binary.LittleEndian, length); err != nil {
|
||||
conn.Close()
|
||||
return nil, err
|
||||
}
|
||||
if _, err := conn.Write(data); err != nil {
|
||||
conn.Close()
|
||||
return nil, err
|
||||
}
|
||||
|
||||
// Read result
|
||||
conn.SetReadDeadline(time.Now().Add(pairTimeout + 5*time.Second))
|
||||
if err := binary.Read(conn, binary.LittleEndian, &length); err != nil {
|
||||
conn.Close()
|
||||
return nil, fmt.Errorf("read relay result: %w", err)
|
||||
}
|
||||
buf := make([]byte, length)
|
||||
if _, err := io.ReadFull(conn, buf); err != nil {
|
||||
conn.Close()
|
||||
return nil, fmt.Errorf("read relay result body: %w", err)
|
||||
}
|
||||
conn.SetReadDeadline(time.Time{})
|
||||
|
||||
var result relayResult
|
||||
json.Unmarshal(buf, &result)
|
||||
if result.Error != 0 {
|
||||
conn.Close()
|
||||
return nil, fmt.Errorf("relay denied: %s", result.Detail)
|
||||
}
|
||||
|
||||
log.Printf("[relay] connected to relay %s, session=%s role=%s", relayAddr, sessionID, role)
|
||||
return conn, nil
|
||||
}
|
||||
189
pkg/relay/relay_test.go
Normal file
189
pkg/relay/relay_test.go
Normal file
@@ -0,0 +1,189 @@
|
||||
package relay
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"net"
|
||||
"sync"
|
||||
"testing"
|
||||
"time"
|
||||
|
||||
"github.com/openp2p-cn/inp2p/pkg/auth"
|
||||
)
|
||||
|
||||
func TestRelayBridge(t *testing.T) {
|
||||
token := auth.MakeToken("test", "pass")
|
||||
mgr := NewManager(29700, true, false, 10, token)
|
||||
if err := mgr.Start(); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
defer mgr.Stop()
|
||||
|
||||
sessionID := "test-session-1"
|
||||
totp := auth.GenTOTP(token, time.Now().Unix())
|
||||
|
||||
var wg sync.WaitGroup
|
||||
var connA, connB net.Conn
|
||||
var errA, errB error
|
||||
|
||||
// Peer A connects as "from"
|
||||
wg.Add(1)
|
||||
go func() {
|
||||
defer wg.Done()
|
||||
connA, errA = ConnectToRelay(
|
||||
fmt.Sprintf("127.0.0.1:%d", 29700),
|
||||
sessionID, "from", "nodeA", totp,
|
||||
)
|
||||
}()
|
||||
|
||||
// Peer B connects as "to" after a short delay
|
||||
wg.Add(1)
|
||||
go func() {
|
||||
defer wg.Done()
|
||||
time.Sleep(200 * time.Millisecond)
|
||||
connB, errB = ConnectToRelay(
|
||||
fmt.Sprintf("127.0.0.1:%d", 29700),
|
||||
sessionID, "to", "nodeB", totp,
|
||||
)
|
||||
}()
|
||||
|
||||
wg.Wait()
|
||||
|
||||
if errA != nil {
|
||||
t.Fatalf("connA error: %v", errA)
|
||||
}
|
||||
if errB != nil {
|
||||
t.Fatalf("connB error: %v", errB)
|
||||
}
|
||||
defer connA.Close()
|
||||
defer connB.Close()
|
||||
|
||||
// Test data flow: A → B
|
||||
msg := []byte("hello through relay")
|
||||
connA.Write(msg)
|
||||
|
||||
buf := make([]byte, 256)
|
||||
connB.SetReadDeadline(time.Now().Add(3 * time.Second))
|
||||
n, err := connB.Read(buf)
|
||||
if err != nil {
|
||||
t.Fatalf("read from B: %v", err)
|
||||
}
|
||||
if string(buf[:n]) != string(msg) {
|
||||
t.Errorf("got %q, want %q", buf[:n], msg)
|
||||
}
|
||||
|
||||
// Test data flow: B → A
|
||||
reply := []byte("relay pong")
|
||||
connB.Write(reply)
|
||||
|
||||
connA.SetReadDeadline(time.Now().Add(3 * time.Second))
|
||||
n, err = connA.Read(buf)
|
||||
if err != nil {
|
||||
t.Fatalf("read from A: %v", err)
|
||||
}
|
||||
if string(buf[:n]) != string(reply) {
|
||||
t.Errorf("got %q, want %q", buf[:n], reply)
|
||||
}
|
||||
|
||||
// Verify session count
|
||||
if mgr.ActiveSessions() != 1 {
|
||||
t.Errorf("active sessions: got %d want 1", mgr.ActiveSessions())
|
||||
}
|
||||
|
||||
t.Logf("✅ Relay bridge OK: A↔B bidirectional, %d active sessions", mgr.ActiveSessions())
|
||||
}
|
||||
|
||||
func TestRelayLargeData(t *testing.T) {
|
||||
token := auth.MakeToken("test", "pass")
|
||||
mgr := NewManager(29701, true, false, 10, token)
|
||||
if err := mgr.Start(); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
defer mgr.Stop()
|
||||
|
||||
sessionID := "test-large-data"
|
||||
totp := auth.GenTOTP(token, time.Now().Unix())
|
||||
|
||||
var wg sync.WaitGroup
|
||||
var connA, connB net.Conn
|
||||
|
||||
wg.Add(2)
|
||||
go func() {
|
||||
defer wg.Done()
|
||||
var err error
|
||||
connA, err = ConnectToRelay("127.0.0.1:29701", sessionID, "from", "bigA", totp)
|
||||
if err != nil {
|
||||
t.Errorf("connA: %v", err)
|
||||
}
|
||||
}()
|
||||
go func() {
|
||||
defer wg.Done()
|
||||
time.Sleep(100 * time.Millisecond)
|
||||
var err error
|
||||
connB, err = ConnectToRelay("127.0.0.1:29701", sessionID, "to", "bigB", totp)
|
||||
if err != nil {
|
||||
t.Errorf("connB: %v", err)
|
||||
}
|
||||
}()
|
||||
wg.Wait()
|
||||
|
||||
if connA == nil || connB == nil {
|
||||
t.Fatal("connection failed")
|
||||
}
|
||||
defer connA.Close()
|
||||
defer connB.Close()
|
||||
|
||||
// Send 1MB through relay
|
||||
const dataSize = 1024 * 1024
|
||||
data := make([]byte, dataSize)
|
||||
for i := range data {
|
||||
data[i] = byte(i % 256)
|
||||
}
|
||||
|
||||
wg.Add(1)
|
||||
go func() {
|
||||
defer wg.Done()
|
||||
connA.Write(data)
|
||||
}()
|
||||
|
||||
// Read exact amount on B side
|
||||
received := make([]byte, dataSize)
|
||||
total := 0
|
||||
connB.SetReadDeadline(time.Now().Add(10 * time.Second))
|
||||
for total < dataSize {
|
||||
n, err := connB.Read(received[total:])
|
||||
if err != nil {
|
||||
t.Fatalf("read at %d: %v", total, err)
|
||||
}
|
||||
total += n
|
||||
}
|
||||
|
||||
wg.Wait()
|
||||
|
||||
if len(received) != len(data) {
|
||||
t.Fatalf("size mismatch: got %d want %d", len(received), len(data))
|
||||
}
|
||||
for i := 0; i < len(data); i++ {
|
||||
if received[i] != data[i] {
|
||||
t.Fatalf("data mismatch at byte %d", i)
|
||||
break
|
||||
}
|
||||
}
|
||||
t.Logf("✅ 1MB relay transfer OK")
|
||||
}
|
||||
|
||||
func TestRelayAuthDenied(t *testing.T) {
|
||||
token := auth.MakeToken("real", "token")
|
||||
mgr := NewManager(29702, true, false, 10, token)
|
||||
if err := mgr.Start(); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
defer mgr.Stop()
|
||||
|
||||
// Use wrong TOTP
|
||||
wrongToken := auth.GenTOTP(auth.MakeToken("wrong", "creds"), time.Now().Unix())
|
||||
_, err := ConnectToRelay("127.0.0.1:29702", "bad-session", "from", "badNode", wrongToken)
|
||||
if err == nil {
|
||||
t.Fatal("expected auth denied, got success")
|
||||
}
|
||||
t.Logf("✅ Auth denied correctly: %v", err)
|
||||
}
|
||||
180
pkg/signal/conn.go
Normal file
180
pkg/signal/conn.go
Normal file
@@ -0,0 +1,180 @@
|
||||
// Package signal provides the WSS signaling connection between client and server.
|
||||
package signal
|
||||
|
||||
import (
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"log"
|
||||
"sync"
|
||||
"time"
|
||||
|
||||
"github.com/gorilla/websocket"
|
||||
"github.com/openp2p-cn/inp2p/pkg/protocol"
|
||||
)
|
||||
|
||||
// Conn wraps a WebSocket connection with message framing.
|
||||
type Conn struct {
|
||||
ws *websocket.Conn
|
||||
writeMu sync.Mutex
|
||||
handlers map[msgKey]Handler
|
||||
hMu sync.RWMutex
|
||||
quit chan struct{}
|
||||
once sync.Once
|
||||
Node string
|
||||
Token uint64
|
||||
|
||||
// waiters for synchronous request-response
|
||||
waiters map[msgKey]chan []byte
|
||||
wMu sync.Mutex
|
||||
}
|
||||
|
||||
type msgKey struct {
|
||||
main uint16
|
||||
sub uint16
|
||||
}
|
||||
|
||||
// Handler processes an incoming message. data includes header + payload.
|
||||
type Handler func(data []byte) error
|
||||
|
||||
// NewConn wraps an existing websocket.
|
||||
func NewConn(ws *websocket.Conn) *Conn {
|
||||
return &Conn{
|
||||
ws: ws,
|
||||
handlers: make(map[msgKey]Handler),
|
||||
waiters: make(map[msgKey]chan []byte),
|
||||
quit: make(chan struct{}),
|
||||
}
|
||||
}
|
||||
|
||||
// OnMessage registers a handler for a specific (MainType, SubType).
|
||||
func (c *Conn) OnMessage(mainType, subType uint16, h Handler) {
|
||||
c.hMu.Lock()
|
||||
c.handlers[msgKey{mainType, subType}] = h
|
||||
c.hMu.Unlock()
|
||||
}
|
||||
|
||||
// Write sends a message with the given type and JSON payload.
|
||||
func (c *Conn) Write(mainType, subType uint16, payload interface{}) error {
|
||||
frame, err := protocol.Encode(mainType, subType, payload)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
return c.WriteRaw(frame)
|
||||
}
|
||||
|
||||
// WriteRaw sends raw bytes.
|
||||
func (c *Conn) WriteRaw(data []byte) error {
|
||||
c.writeMu.Lock()
|
||||
defer c.writeMu.Unlock()
|
||||
c.ws.SetWriteDeadline(time.Now().Add(10 * time.Second))
|
||||
return c.ws.WriteMessage(websocket.BinaryMessage, data)
|
||||
}
|
||||
|
||||
// Request sends a message and waits for a specific response type.
|
||||
func (c *Conn) Request(mainType, subType uint16, payload interface{},
|
||||
rspMain, rspSub uint16, timeout time.Duration) ([]byte, error) {
|
||||
|
||||
ch := make(chan []byte, 1)
|
||||
key := msgKey{rspMain, rspSub}
|
||||
|
||||
c.wMu.Lock()
|
||||
c.waiters[key] = ch
|
||||
c.wMu.Unlock()
|
||||
|
||||
defer func() {
|
||||
c.wMu.Lock()
|
||||
delete(c.waiters, key)
|
||||
c.wMu.Unlock()
|
||||
}()
|
||||
|
||||
if err := c.Write(mainType, subType, payload); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
select {
|
||||
case data := <-ch:
|
||||
return data, nil
|
||||
case <-time.After(timeout):
|
||||
return nil, fmt.Errorf("request timeout %d:%d → %d:%d", mainType, subType, rspMain, rspSub)
|
||||
case <-c.quit:
|
||||
return nil, fmt.Errorf("connection closed")
|
||||
}
|
||||
}
|
||||
|
||||
// ReadLoop reads messages and dispatches to handlers. Blocks until error or Close().
|
||||
func (c *Conn) ReadLoop() error {
|
||||
for {
|
||||
_, msg, err := c.ws.ReadMessage()
|
||||
if err != nil {
|
||||
select {
|
||||
case <-c.quit:
|
||||
return nil
|
||||
default:
|
||||
return err
|
||||
}
|
||||
}
|
||||
if len(msg) < protocol.HeaderSize {
|
||||
continue
|
||||
}
|
||||
h, err := protocol.DecodeHeader(msg)
|
||||
if err != nil {
|
||||
continue
|
||||
}
|
||||
|
||||
key := msgKey{h.MainType, h.SubType}
|
||||
|
||||
// Check waiters first (synchronous request-response)
|
||||
c.wMu.Lock()
|
||||
if ch, ok := c.waiters[key]; ok {
|
||||
delete(c.waiters, key)
|
||||
c.wMu.Unlock()
|
||||
select {
|
||||
case ch <- msg:
|
||||
default:
|
||||
}
|
||||
continue
|
||||
}
|
||||
c.wMu.Unlock()
|
||||
|
||||
// Dispatch to registered handler
|
||||
c.hMu.RLock()
|
||||
handler, ok := c.handlers[key]
|
||||
c.hMu.RUnlock()
|
||||
|
||||
if ok {
|
||||
if err := handler(msg); err != nil {
|
||||
log.Printf("[signal] handler %d:%d error: %v", h.MainType, h.SubType, err)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Close gracefully shuts down the connection.
|
||||
func (c *Conn) Close() {
|
||||
c.once.Do(func() {
|
||||
close(c.quit)
|
||||
c.ws.Close()
|
||||
})
|
||||
}
|
||||
|
||||
// IsClosed reports whether the connection has been closed.
|
||||
func (c *Conn) IsClosed() bool {
|
||||
select {
|
||||
case <-c.quit:
|
||||
return true
|
||||
default:
|
||||
return false
|
||||
}
|
||||
}
|
||||
|
||||
// ─── Helpers ───
|
||||
|
||||
// ParsePayload is a convenience to unmarshal JSON from a raw message.
|
||||
func ParsePayload[T any](data []byte) (T, error) {
|
||||
var v T
|
||||
if len(data) <= protocol.HeaderSize {
|
||||
return v, nil
|
||||
}
|
||||
err := json.Unmarshal(data[protocol.HeaderSize:], &v)
|
||||
return v, err
|
||||
}
|
||||
233
pkg/tunnel/tunnel.go
Normal file
233
pkg/tunnel/tunnel.go
Normal file
@@ -0,0 +1,233 @@
|
||||
// Package tunnel provides P2P tunnel with mux-based port forwarding.
|
||||
package tunnel
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"io"
|
||||
"log"
|
||||
"net"
|
||||
"sync"
|
||||
"sync/atomic"
|
||||
"time"
|
||||
|
||||
"github.com/openp2p-cn/inp2p/pkg/mux"
|
||||
)
|
||||
|
||||
// Tunnel represents a P2P tunnel that multiplexes port forwards over one connection.
|
||||
type Tunnel struct {
|
||||
PeerNode string
|
||||
PeerIP string
|
||||
LinkMode string // "udppunch", "tcppunch", "relay", "direct"
|
||||
RTT time.Duration
|
||||
|
||||
sess *mux.Session
|
||||
listeners map[int]*forwarder // srcPort → forwarder
|
||||
mu sync.Mutex
|
||||
closed int32
|
||||
stats Stats
|
||||
}
|
||||
|
||||
type forwarder struct {
|
||||
listener net.Listener
|
||||
dstHost string
|
||||
dstPort int
|
||||
quit chan struct{}
|
||||
}
|
||||
|
||||
// Stats tracks tunnel traffic.
|
||||
type Stats struct {
|
||||
BytesSent int64
|
||||
BytesReceived int64
|
||||
Connections int64
|
||||
ActiveStreams int32
|
||||
}
|
||||
|
||||
// New creates a tunnel from an established P2P connection.
|
||||
// isInitiator: the side that opened the P2P connection is the mux client.
|
||||
func New(peerNode string, conn net.Conn, linkMode string, rtt time.Duration, isInitiator bool) *Tunnel {
|
||||
return &Tunnel{
|
||||
PeerNode: peerNode,
|
||||
PeerIP: conn.RemoteAddr().String(),
|
||||
LinkMode: linkMode,
|
||||
RTT: rtt,
|
||||
sess: mux.NewSession(conn, !isInitiator), // initiator=client, responder=server
|
||||
listeners: make(map[int]*forwarder),
|
||||
}
|
||||
}
|
||||
|
||||
// ListenAndForward starts a local listener that forwards connections through the tunnel.
|
||||
// Each accepted connection opens a mux stream to the peer, which connects to dstHost:dstPort.
|
||||
func (t *Tunnel) ListenAndForward(protocol string, srcPort int, dstHost string, dstPort int) error {
|
||||
addr := fmt.Sprintf(":%d", srcPort)
|
||||
ln, err := net.Listen(protocol, addr)
|
||||
if err != nil {
|
||||
return fmt.Errorf("listen %s %s: %w", protocol, addr, err)
|
||||
}
|
||||
|
||||
fwd := &forwarder{
|
||||
listener: ln,
|
||||
dstHost: dstHost,
|
||||
dstPort: dstPort,
|
||||
quit: make(chan struct{}),
|
||||
}
|
||||
|
||||
t.mu.Lock()
|
||||
t.listeners[srcPort] = fwd
|
||||
t.mu.Unlock()
|
||||
|
||||
log.Printf("[tunnel] LISTEN %s:%d → %s(%s:%d) via %s", protocol, srcPort, t.PeerNode, dstHost, dstPort, t.LinkMode)
|
||||
|
||||
go t.acceptLoop(fwd)
|
||||
return nil
|
||||
}
|
||||
|
||||
func (t *Tunnel) acceptLoop(fwd *forwarder) {
|
||||
for {
|
||||
conn, err := fwd.listener.Accept()
|
||||
if err != nil {
|
||||
select {
|
||||
case <-fwd.quit:
|
||||
return
|
||||
default:
|
||||
if atomic.LoadInt32(&t.closed) == 1 {
|
||||
return
|
||||
}
|
||||
log.Printf("[tunnel] accept error: %v", err)
|
||||
continue
|
||||
}
|
||||
}
|
||||
atomic.AddInt64(&t.stats.Connections, 1)
|
||||
go t.handleLocalConn(conn, fwd.dstHost, fwd.dstPort)
|
||||
}
|
||||
}
|
||||
|
||||
func (t *Tunnel) handleLocalConn(local net.Conn, dstHost string, dstPort int) {
|
||||
defer local.Close()
|
||||
|
||||
// Open a mux stream
|
||||
stream, err := t.sess.Open()
|
||||
if err != nil {
|
||||
log.Printf("[tunnel] mux open error: %v", err)
|
||||
return
|
||||
}
|
||||
defer stream.Close()
|
||||
|
||||
atomic.AddInt32(&t.stats.ActiveStreams, 1)
|
||||
defer atomic.AddInt32(&t.stats.ActiveStreams, -1)
|
||||
|
||||
// Send destination info as first message on the stream
|
||||
// Format: "host:port\n"
|
||||
header := fmt.Sprintf("%s:%d\n", dstHost, dstPort)
|
||||
if _, err := stream.Write([]byte(header)); err != nil {
|
||||
log.Printf("[tunnel] stream write header: %v", err)
|
||||
return
|
||||
}
|
||||
|
||||
// Bidirectional copy
|
||||
t.bridge(local, stream)
|
||||
}
|
||||
|
||||
// AcceptAndConnect handles incoming mux streams (called on the responder side).
|
||||
// It reads the destination header and connects to the local target.
|
||||
func (t *Tunnel) AcceptAndConnect() {
|
||||
for {
|
||||
stream, err := t.sess.Accept()
|
||||
if err != nil {
|
||||
if !t.sess.IsClosed() {
|
||||
log.Printf("[tunnel] mux accept error: %v", err)
|
||||
}
|
||||
return
|
||||
}
|
||||
go t.handleRemoteStream(stream)
|
||||
}
|
||||
}
|
||||
|
||||
func (t *Tunnel) handleRemoteStream(stream *mux.Stream) {
|
||||
defer stream.Close()
|
||||
|
||||
atomic.AddInt32(&t.stats.ActiveStreams, 1)
|
||||
defer atomic.AddInt32(&t.stats.ActiveStreams, -1)
|
||||
|
||||
// Read destination header: "host:port\n"
|
||||
buf := make([]byte, 256)
|
||||
n := 0
|
||||
for n < len(buf) {
|
||||
nn, err := stream.Read(buf[n : n+1])
|
||||
if err != nil {
|
||||
log.Printf("[tunnel] read dest header: %v", err)
|
||||
return
|
||||
}
|
||||
n += nn
|
||||
if buf[n-1] == '\n' {
|
||||
break
|
||||
}
|
||||
}
|
||||
dest := string(buf[:n-1]) // trim \n
|
||||
|
||||
// Connect to local destination
|
||||
conn, err := net.DialTimeout("tcp", dest, 5*time.Second)
|
||||
if err != nil {
|
||||
log.Printf("[tunnel] connect to %s failed: %v", dest, err)
|
||||
return
|
||||
}
|
||||
defer conn.Close()
|
||||
|
||||
log.Printf("[tunnel] stream → %s connected", dest)
|
||||
|
||||
// Bidirectional copy
|
||||
t.bridge(conn, stream)
|
||||
}
|
||||
|
||||
func (t *Tunnel) bridge(a, b io.ReadWriter) {
|
||||
var wg sync.WaitGroup
|
||||
wg.Add(2)
|
||||
|
||||
copyAndCount := func(dst io.Writer, src io.Reader, counter *int64) {
|
||||
defer wg.Done()
|
||||
n, _ := io.Copy(dst, src)
|
||||
atomic.AddInt64(counter, n)
|
||||
}
|
||||
|
||||
go copyAndCount(a, b, &t.stats.BytesReceived)
|
||||
go copyAndCount(b, a, &t.stats.BytesSent)
|
||||
|
||||
wg.Wait()
|
||||
}
|
||||
|
||||
// Close shuts down the tunnel and all listeners.
|
||||
func (t *Tunnel) Close() {
|
||||
if !atomic.CompareAndSwapInt32(&t.closed, 0, 1) {
|
||||
return
|
||||
}
|
||||
|
||||
t.mu.Lock()
|
||||
for port, fwd := range t.listeners {
|
||||
close(fwd.quit)
|
||||
fwd.listener.Close()
|
||||
log.Printf("[tunnel] stopped :%d", port)
|
||||
}
|
||||
t.mu.Unlock()
|
||||
|
||||
t.sess.Close()
|
||||
log.Printf("[tunnel] closed → %s", t.PeerNode)
|
||||
}
|
||||
|
||||
// GetStats returns traffic statistics.
|
||||
func (t *Tunnel) GetStats() Stats {
|
||||
return Stats{
|
||||
BytesSent: atomic.LoadInt64(&t.stats.BytesSent),
|
||||
BytesReceived: atomic.LoadInt64(&t.stats.BytesReceived),
|
||||
Connections: atomic.LoadInt64(&t.stats.Connections),
|
||||
ActiveStreams: atomic.LoadInt32(&t.stats.ActiveStreams),
|
||||
}
|
||||
}
|
||||
|
||||
// IsAlive returns true if the tunnel is open.
|
||||
func (t *Tunnel) IsAlive() bool {
|
||||
return atomic.LoadInt32(&t.closed) == 0 && !t.sess.IsClosed()
|
||||
}
|
||||
|
||||
// NumStreams returns active mux streams.
|
||||
func (t *Tunnel) NumStreams() int {
|
||||
return t.sess.NumStreams()
|
||||
}
|
||||
176
pkg/tunnel/tunnel_test.go
Normal file
176
pkg/tunnel/tunnel_test.go
Normal file
@@ -0,0 +1,176 @@
|
||||
package tunnel
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"io"
|
||||
"net"
|
||||
"testing"
|
||||
"time"
|
||||
)
|
||||
|
||||
func TestEndToEndForward(t *testing.T) {
|
||||
// 1. Start a "target" TCP server (simulates SSH on the remote side)
|
||||
targetLn, err := net.Listen("tcp", "127.0.0.1:0")
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
defer targetLn.Close()
|
||||
targetPort := targetLn.Addr().(*net.TCPAddr).Port
|
||||
|
||||
go func() {
|
||||
for {
|
||||
conn, err := targetLn.Accept()
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
go func(c net.Conn) {
|
||||
defer c.Close()
|
||||
buf := make([]byte, 1024)
|
||||
n, _ := c.Read(buf)
|
||||
c.Write([]byte("ECHO:" + string(buf[:n])))
|
||||
}(conn)
|
||||
}
|
||||
}()
|
||||
|
||||
// 2. Create a connected pair (simulates a P2P punch connection)
|
||||
c1, c2 := net.Pipe()
|
||||
|
||||
// 3. Create tunnels on both sides
|
||||
initiator := New("remote-node", c1, "test", 0, true)
|
||||
responder := New("local-node", c2, "test", 0, false)
|
||||
defer initiator.Close()
|
||||
defer responder.Close()
|
||||
|
||||
// Responder accepts incoming mux streams and connects to local targets
|
||||
go responder.AcceptAndConnect()
|
||||
|
||||
// 4. Initiator listens on a local port and forwards to remote target
|
||||
localLn, err := net.Listen("tcp", "127.0.0.1:0")
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
localPort := localLn.Addr().(*net.TCPAddr).Port
|
||||
localLn.Close() // free the port so tunnel can use it
|
||||
|
||||
err = initiator.ListenAndForward("tcp", localPort, "127.0.0.1", targetPort)
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
|
||||
time.Sleep(50 * time.Millisecond)
|
||||
|
||||
// 5. Connect to the tunnel's local port
|
||||
conn, err := net.Dial("tcp", fmt.Sprintf("127.0.0.1:%d", localPort))
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
defer conn.Close()
|
||||
|
||||
// 6. Send data and verify echo
|
||||
conn.Write([]byte("hello-tunnel"))
|
||||
conn.SetReadDeadline(time.Now().Add(3 * time.Second))
|
||||
buf := make([]byte, 1024)
|
||||
n, err := conn.Read(buf)
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
|
||||
got := string(buf[:n])
|
||||
want := "ECHO:hello-tunnel"
|
||||
if got != want {
|
||||
t.Errorf("got %q, want %q", got, want)
|
||||
}
|
||||
}
|
||||
|
||||
func TestMultipleConnections(t *testing.T) {
|
||||
// Target server: echoes back with a prefix
|
||||
targetLn, _ := net.Listen("tcp", "127.0.0.1:0")
|
||||
defer targetLn.Close()
|
||||
targetPort := targetLn.Addr().(*net.TCPAddr).Port
|
||||
|
||||
go func() {
|
||||
for {
|
||||
conn, err := targetLn.Accept()
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
go func(c net.Conn) {
|
||||
defer c.Close()
|
||||
io.Copy(c, c) // pure echo
|
||||
}(conn)
|
||||
}
|
||||
}()
|
||||
|
||||
c1, c2 := net.Pipe()
|
||||
initiator := New("peer", c1, "test", 0, true)
|
||||
responder := New("me", c2, "test", 0, false)
|
||||
defer initiator.Close()
|
||||
defer responder.Close()
|
||||
|
||||
go responder.AcceptAndConnect()
|
||||
|
||||
localLn, _ := net.Listen("tcp", "127.0.0.1:0")
|
||||
localPort := localLn.Addr().(*net.TCPAddr).Port
|
||||
localLn.Close()
|
||||
|
||||
initiator.ListenAndForward("tcp", localPort, "127.0.0.1", targetPort)
|
||||
time.Sleep(50 * time.Millisecond)
|
||||
|
||||
// Open 5 concurrent connections through the tunnel
|
||||
const N = 5
|
||||
done := make(chan bool, N)
|
||||
|
||||
for i := 0; i < N; i++ {
|
||||
go func(idx int) {
|
||||
conn, err := net.Dial("tcp", fmt.Sprintf("127.0.0.1:%d", localPort))
|
||||
if err != nil {
|
||||
t.Errorf("conn %d: dial: %v", idx, err)
|
||||
done <- false
|
||||
return
|
||||
}
|
||||
defer conn.Close()
|
||||
|
||||
msg := fmt.Sprintf("msg-%d", idx)
|
||||
conn.Write([]byte(msg))
|
||||
conn.SetReadDeadline(time.Now().Add(3 * time.Second))
|
||||
buf := make([]byte, 256)
|
||||
n, err := conn.Read(buf)
|
||||
if err != nil || string(buf[:n]) != msg {
|
||||
t.Errorf("conn %d: got %q, want %q, err=%v", idx, buf[:n], msg, err)
|
||||
done <- false
|
||||
return
|
||||
}
|
||||
done <- true
|
||||
}(i)
|
||||
}
|
||||
|
||||
for i := 0; i < N; i++ {
|
||||
if ok := <-done; !ok {
|
||||
t.Errorf("connection %d failed", i)
|
||||
}
|
||||
}
|
||||
|
||||
stats := initiator.GetStats()
|
||||
if stats.Connections != N {
|
||||
t.Errorf("connections: got %d want %d", stats.Connections, N)
|
||||
}
|
||||
}
|
||||
|
||||
func TestTunnelStats(t *testing.T) {
|
||||
c1, c2 := net.Pipe()
|
||||
initiator := New("peer", c1, "test", 0, true)
|
||||
responder := New("me", c2, "test", 0, false)
|
||||
defer initiator.Close()
|
||||
defer responder.Close()
|
||||
|
||||
if !initiator.IsAlive() || !responder.IsAlive() {
|
||||
t.Error("tunnels should be alive")
|
||||
}
|
||||
|
||||
initiator.Close()
|
||||
time.Sleep(50 * time.Millisecond)
|
||||
|
||||
if initiator.IsAlive() {
|
||||
t.Error("initiator should be dead after close")
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user