chore: bump version to 0.6.1

路由性能优化:
- 修复 macOS route 命令语法错误（去掉 -net 参数）
- 路由应用拆分为 Essential（ready前，4-6条命令<1s）+ Deferred（ready后，批量脚本）
- 新增 CIDR 聚合算法（cidrmerge.go），合并相邻 CIDR 块减少路由数量（10826->7500）
- 批量脚本执行：3平台各实现8个批量函数，临时脚本单次执行替代逐条进程创建
- 并行批量：拆为4个子shell并行执行，总时间降为1/4

连接步骤显示:
- stats 新增 connectStep + cidrError 原子变量
- 连接生命周期中设置步骤（fetch_cidrs/connecting/load_routes），UI 实时显示
- after-proxy CIDR 获取期间显示加载状态，获取失败显示错误提示

CIDR 刷新按钮:
- ipc 新增 CmdRefreshCIDR 命令
- daemon 处理刷新请求，session.RefreshCIDRs() 重新获取+添加路由
- UI 状态卡新增刷新按钮，proxy/bypass 模式已连接时显示

README:
- 补充 URL 获取时机注意事项（bypass模式after-proxy可能失败）
- 补充 CIDR 聚合与批量执行说明

.github/workflows/release.yml

@@ -0,0 +1,114 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Version (e.g. 0.3.9, 不带 v 前缀)'
+        required: true
+
+permissions:
+  contents: write
+
+jobs:
+  build-macos:
+    runs-on: macos-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+
+      - name: Resolve version
+        id: ver
+        run: |
+          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
+            echo "version=${{ inputs.version }}" >> "$GITHUB_OUTPUT"
+          else
+            echo "version=${GITHUB_REF_NAME#v}" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Vet
+        run: make vet
+
+      - name: Build .app
+        run: make app SEMVER=${{ steps.ver.outputs.version }}
+
+      - name: Package .app as zip
+        run: |
+          VERSION="${{ steps.ver.outputs.version }}-$(git rev-parse --short HEAD)"
+          ditto -c -k --sequesterRsrc --keepParent LMVPN.app "LMVPN-${VERSION}-macos.zip"
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: macos-build
+          path: LMVPN-*-macos.zip
+
+  build-windows:
+    runs-on: windows-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+
+      - name: Install make and Inno Setup
+        shell: pwsh
+        run: choco install make innosetup -y --no-progress
+
+      - name: Add MinGW to PATH
+        shell: bash
+        run: echo "C:/msys64/mingw64/bin" >> "$GITHUB_PATH"
+
+      - name: Resolve version
+        id: ver
+        shell: bash
+        run: |
+          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
+            echo "version=${{ inputs.version }}" >> "$GITHUB_OUTPUT"
+          else
+            echo "version=${GITHUB_REF_NAME#v}" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Vet
+        shell: bash
+        run: make vet
+
+      - name: Build installer
+        shell: bash
+        env:
+          MSYS_NO_PATHCONV: '1'
+        run: make installer-windows SEMVER=${{ steps.ver.outputs.version }} MINGW_CC=gcc SHELL=bash
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: windows-build
+          path: build/LMVPN-Setup-*.exe
+
+  release:
+    needs: [build-macos, build-windows]
+    runs-on: ubuntu-latest
+    if: startsWith(github.ref, 'refs/tags/')
+    steps:
+      - name: Download artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: artifacts
+          merge-multiple: true
+
+      - name: Create release
+        uses: softprops/action-gh-release@v2
+        with:
+          files: artifacts/*
+          generate_release_notes: true

Makefile

@@ -9,11 +9,14 @@ APP_BUNDLE  = $(APP_NAME).app
 
 GO          = go
 CGO_ENABLED = 1
+WINDRES     ?= x86_64-w64-mingw32-windres
+MINGW_CC    ?= x86_64-w64-mingw32-gcc
+SEMVER      ?= 0.6.1
 GIT_HASH    = $(shell git rev-parse --short HEAD 2>/dev/null || echo unknown)
-VERSION     = 0.1.1-$(GIT_HASH)
-LDFLAGS     = -s -w -X lmvpn/internal/ui.Version=$(VERSION)
+VERSION     = $(SEMVER)-$(GIT_HASH)
+LDFLAGS     = -s -w -X lmvpn/internal/version.Version=$(VERSION)
 
-.PHONY: all build app run daemon clean vet tidy fmt icon
+.PHONY: all build app run daemon clean vet tidy fmt icon icon-windows build-windows installer-windows
 
 ## all: build the .app bundle (default)
 all: app
@@ -32,6 +35,9 @@ app: build
 	cp $(BUILD_DIR)/$(GUI_BIN) $(APP_BUNDLE)/Contents/MacOS/$(GUI_BIN)
 	cp $(BUILD_DIR)/$(DAEMON_BIN) $(APP_BUNDLE)/Contents/MacOS/$(DAEMON_BIN)
 	cp resources/Info.plist $(APP_BUNDLE)/Contents/Info.plist
+	/usr/libexec/PlistBuddy -c "Set :CFBundleShortVersionString $(SEMVER)" \
+		-c "Set :CFBundleVersion $(GIT_HASH)" \
+		$(APP_BUNDLE)/Contents/Info.plist
 	@if [ -f resources/icon.icns ]; then \
 		cp resources/icon.icns $(APP_BUNDLE)/Contents/Resources/icon.icns; \
 	else echo "  (no icon.icns found, skipping icon)"; fi
@@ -80,3 +86,36 @@ fmt:
 ## clean: remove build artifacts
 clean:
 	rm -rf $(BUILD_DIR) $(APP_BUNDLE)
+
+## icon-windows: generate icon.ico and compile Windows resource (.syso)
+icon-windows:
+	go run resources/genico/main.go
+	$(WINDRES) -i resources/lmvpn.rc -O coff -o cmd/lmvpn/resource_windows_amd64.syso
+	$(WINDRES) -i resources/lmvpn.rc -O coff -o cmd/lmvpnd/resource_windows_amd64.syso
+	@echo "Generated Windows icon resources"
+
+## build-windows: cross-compile Windows x86_64 exes (requires mingw-w64)
+## The .syso icon resources are committed in cmd/*/; run `make icon-windows` to regenerate.
+build-windows:
+	mkdir -p $(BUILD_DIR)
+	CGO_ENABLED=1 GOOS=windows GOARCH=amd64 CC=$(MINGW_CC) \
+		$(GO) build -ldflags "$(LDFLAGS) -H windowsgui" -o $(BUILD_DIR)/$(GUI_BIN).exe ./cmd/lmvpn
+	CGO_ENABLED=1 GOOS=windows GOARCH=amd64 CC=$(MINGW_CC) \
+		$(GO) build -ldflags "$(LDFLAGS)" -o $(BUILD_DIR)/$(DAEMON_BIN).exe ./cmd/lmvpnd
+	@echo "Built $(BUILD_DIR)/$(GUI_BIN).exe and $(BUILD_DIR)/$(DAEMON_BIN).exe"
+
+## installer-windows: build exes and compile Inno Setup installer (.exe)
+## Requires ISCC on PATH (Windows) or Wine + Inno Setup 6 (macOS/Linux).
+installer-windows: build-windows
+	@echo "Compiling installer with version $(VERSION)..."
+	@if command -v ISCC >/dev/null 2>&1; then \
+		ISCC /DAppVersion=$(VERSION) installer/lmvpn.iss; \
+	elif command -v wine >/dev/null 2>&1; then \
+		wine "C:\Program Files (x86)\Inno Setup 6\ISCC.exe" /DAppVersion=$(VERSION) installer/lmvpn.iss; \
+	else \
+		echo "ERROR: ISCC not found. Install Inno Setup 6 on Windows,"; \
+		echo "       or install Wine + Inno Setup 6 on macOS/Linux."; \
+		echo "       Download: https://jrsoftware.org/isdl.php"; \
+		exit 1; \
+	fi
+	@echo "Installer: $(BUILD_DIR)/LMVPN-Setup-$(VERSION).exe"

README.md

@@ -0,0 +1,353 @@
+# LMVPN Client
+
+LMVPN 是一个基于 WebSocket 隧道与 TUN 虚拟网卡的**三层（网络层）VPN 客户端**。客户端通过 WebSocket（`ws://`/`wss://`）连接服务端，完成认证后在本地 TUN 虚拟网卡与 WebSocket 连接之间双向转发原始 IP 数据包，实现透明隧道。
+
+客户端使用 [Go](https://go.dev/) + [Fyne](https://fyne.io/) 开发，支持 macOS、Windows、Linux 三大桌面平台。
+
+> **服务端项目**：<https://github.com/wuwenfengmi1998/lmvpn_server>
+
+---
+
+## 目录
+
+- [功能特性](#功能特性)
+- [系统要求](#系统要求)
+- [各平台编译](#各平台编译)
+  - [通用前置依赖](#通用前置依赖)
+  - [macOS](#macos)
+  - [Windows（交叉编译）](#windows交叉编译)
+  - [Linux](#linux)
+  - [Make 目标速查表](#make-目标速查表)
+- [运行使用](#运行使用)
+- [配置与数据目录](#配置与数据目录)
+- [架构概览](#架构概览)
+- [开发指南](#开发指南)
+- [注意事项](#注意事项)
+
+---
+
+## 功能特性
+
+- **双进程架构**：GUI（`lmvpn`，普通用户）+ 守护进程（`lmvpnd`，root/管理员），自动拉起与生命周期管理
+- **多种认证**：JWT 令牌 / 用户名密码
+- **隧道模式**：全隧道、代理 CIDR（指定 CIDR 走隧道）、绕过 CIDR（指定 CIDR 绕过隧道），支持 IPv4/IPv6 分开配置与 URL 动态获取 CIDR 列表
+  - **URL 获取时机**：代理前（直连获取，适用于 GitHub 等外部源）或代理后（通过隧道获取，适用于 VPN 服务器可达的源）
+  - **注意**：绕过 CIDR 模式下"代理后获取"可能失败——/1 覆盖路由会将 HTTP 请求导入隧道，若 VPN 服务器无法访问目标 URL 则超时。建议将 GitHub 等外部源设置为"代理前获取"
+  - **CIDR 聚合**：自动合并相邻 CIDR 块以减少路由数量，配合批量脚本并行执行加速路由添加
+  - **实时统计**：状态栏显示路由模式、CIDR 命中数、加载进度；支持手动刷新 CIDR 列表
+- **多服务器管理**：配置文件 + SQLite 存储多个服务器配置（Profile）
+- **国际化**：中文（简体）、英文，跟随系统语言
+- **安全存储**：macOS Keychain / Windows Credential Manager 加密保存凭据
+- **系统集成**：系统托盘图标、Dock 显隐、开机自启
+- **日志轮转**：基于 lumberjack 的文件日志自动轮转
+
+---
+
+## 系统要求
+
+| 平台 | 最低版本 | 架构 | 备注 |
+|------|---------|------|------|
+| macOS | 11.0（Big Sur） | amd64 / arm64 | 需 Xcode Command Line Tools |
+| Windows | 10 | x86_64 | 仅支持 64 位，需 WinTun 驱动（已内置） |
+| Linux | 现代发行版 | amd64 / arm64 | 需 OpenGL/GLFW/libdbus 开发库 |
+
+**所有平台均要求 `CGO_ENABLED=1`**（Fyne 依赖 OpenGL/GLFW 的 CGO 绑定，不可关闭）。
+
+---
+
+## 各平台编译
+
+### 通用前置依赖
+
+- **Go 1.26** 或更高版本（见 `go.mod`）
+- **Git**：用于在编译时注入版本号，格式为 `0.3.7-<git短哈希>`（如 `0.3.7-019df7b`）
+- **C 编译器**：GCC（Linux/Windows 交叉编译）或 clang（macOS），由 CGO 调用
+- **网络访问**：首次构建需拉取 Go 模块依赖
+
+版本号通过 `-ldflags "-X lmvpn/internal/version.Version=$(VERSION)"` 在链接期注入到 `internal/version` 包，GUI 与守护进程共享同一版本字符串。
+
+### macOS
+
+#### 依赖
+
+- **Xcode Command Line Tools**：提供 clang（CGO）、Cocoa 框架、`sips`、`iconutil`（图标生成）
+
+  ```bash
+  xcode-select --install
+  ```
+
+- 最低部署目标 macOS 11.0（见 `resources/Info.plist` 的 `LSMinimumSystemVersion`）
+
+#### 编译命令
+
+```bash
+# 默认目标：编译二进制并组装 LMVPN.app bundle
+make            # 等价于 make app
+
+# 仅编译裸二进制（build/lmvpn、build/lmvpnd），不打包 .app
+make build
+
+# 重新生成 macOS 图标 resources/icon.icns（需要 icon.png 或 logo.svg）
+make icon
+
+# 编译并直接运行 GUI
+make run
+```
+
+`make app` 会将 `build/lmvpn`、`build/lmvpnd` 连同 `resources/Info.plist`、`resources/icon.icns` 组装成 `LMVPN.app/`。
+
+#### 运行
+
+守护进程创建 TUN 网卡与修改路由需要 root 权限，GUI 通过 `osascript ... with administrator privileges` 弹出系统授权对话框提权拉起守护进程。日常使用直接双击 `LMVPN.app` 即可。
+
+---
+
+### Windows（交叉编译）
+
+Windows 版本从 macOS 或 Linux **交叉编译**生成（Fyne 无法用 `CGO_ENABLED=0` 构建，因此必须借助 mingw-w64 提供 C 交叉编译器）。仅支持 **x86_64** 架构。
+
+#### 依赖
+
+- **mingw-w64 工具链**：提供 `x86_64-w64-mingw32-gcc`（C 编译器）与 `x86_64-w64-mingw32-windres`（资源编译器）
+
+  ```bash
+  # macOS
+  brew install mingw-w64
+  ```
+
+- **Inno Setup 6**（仅打包安装程序时需要）：用于生成 `.exe` 安装包
+  - 原生 Windows：将 `ISCC` 加入 `PATH`
+  - macOS/Linux：通过 Wine 调用，需安装 Wine 并将 Inno Setup 6 装到 Wine 的 `C:\Program Files (x86)\Inno Setup 6\`
+
+#### 编译命令
+
+```bash
+# 1. 生成 Windows 图标与资源（.ico + .syso），并交叉编译 exe
+make build-windows
+
+# 2. 单独生成图标资源（生成 resource_windows_amd64.syso，会被 go build 自动链接）
+make icon-windows
+
+# 3. 编译并打包 Inno Setup 安装程序
+make installer-windows
+```
+
+`make build-windows` 实际执行：
+
+```bash
+# GUI（带 -H windowsgui，无控制台窗口）
+CGO_ENABLED=1 GOOS=windows GOARCH=amd64 CC=x86_64-w64-mingw32-gcc \
+    go build -ldflags "-s -w -X ... -H windowsgui" -o build/lmvpn.exe ./cmd/lmvpn
+
+# 守护进程（控制台程序）
+CGO_ENABLED=1 GOOS=windows GOARCH=amd64 CC=x86_64-w64-mingw32-gcc \
+    go build -ldflags "-s -w -X ..." -o build/lmvpnd.exe ./cmd/lmvpnd
+```
+
+产物：`build/lmvpn.exe`、`build/lmvpnd.exe`，安装包 `build/LMVPN-Setup-<version>.exe`。
+
+#### 关于 WinTun
+
+Windows 版使用 [WinTun](https://www.wintun.net/) 驱动创建虚拟网卡。`wintun.dll` 在编译期通过 `//go:embed` 嵌入二进制，运行时释放到 exe 同级目录；安装包也会单独安装一份 `wintun.dll`。
+
+#### 运行
+
+守护进程需要管理员权限，GUI 通过 UAC（`ShellExecuteW` + `runas`）提权拉起。
+
+---
+
+### Linux
+
+Linux 没有独立的 Make 目标，使用平台无关的 `make build` 原生编译。
+
+#### 依赖
+
+- **GCC**（CGO 编译器）
+- **OpenGL 与 GLFW 开发库**（Fyne 依赖）：`libgl`、`libglfw`、`libx11`、xorg 开发头
+- **libdbus-1 开发库**（系统托盘，经 `godbus/dbus`）：`libdbus-1-dev` 或对应开发包
+
+> 请根据所用发行版（apt / dnf / pacman 等）自行安装上述开发库。
+
+#### 编译命令
+
+```bash
+# 原生编译（平台无关，直接产出 build/lmvpn、build/lmvpnd）
+make build
+
+# 编译并运行 GUI
+make run
+
+# 以 root 运行守护进程（调试用）
+make daemon
+```
+
+#### 运行
+
+- TUN 网卡创建与路由配置需要 **root 或 `CAP_NET_ADMIN`** 能力
+- 提权方式：`pkexec`（`internal/ui/elevation_other.go`）
+- 系统命令依赖：`ip`、`ip route`（`internal/route/route_linux.go`、`internal/tun/tun_linux.go`）
+- **密钥链**：Linux 暂使用内存存储（不持久化），重启后凭据丢失，后续需接入 Secret Service 等后端
+
+---
+
+### Make 目标速查表
+
+| 目标 | 说明 |
+|------|------|
+| `make` / `make all` / `make app` | 编译并组装 macOS `LMVPN.app` bundle（默认） |
+| `make build` | 仅编译 `lmvpn` + `lmvpnd` 裸二进制（macOS/Linux 原生） |
+| `make run` | 编译并运行 GUI |
+| `make daemon` | 编译并以 `sudo` 运行守护进程 |
+| `make build-windows` | 交叉编译 Windows x64 exe（含图标资源生成） |
+| `make icon-windows` | 生成 Windows `.ico` 与 `.syso` 资源文件 |
+| `make installer-windows` | 编译 exe 并打包 Inno Setup 安装程序 |
+| `make icon` | 由 `icon.png`/`logo.svg` 重新生成 macOS `icon.icns` |
+| `make vet` | 运行 `go vet ./...` |
+| `make fmt` | 运行 `go fmt ./...` |
+| `make tidy` | 运行 `go mod tidy` |
+| `make clean` | 清理 `build/` 与 `LMVPN.app/` |
+
+---
+
+## 运行使用
+
+GUI 会自动管理守护进程的生命周期（拉起、停止），无需手动启动 `lmvpnd`。
+
+- **macOS**：双击 `LMVPN.app`，首次连接时系统弹出授权对话框输入密码以提权守护进程
+- **Windows**：运行安装包或直接运行 `lmvpn.exe`，首次连接时 UAC 弹窗确认提权
+- **Linux**：`make run` 或运行编译好的 `lmvpn`，首次连接时 `pkexec` 弹窗输入密码提权
+
+GUI 与守护进程通过本地 IPC 通信：macOS/Linux 使用 Unix socket `/tmp/lmvpn.sock`；Windows 使用 TCP `127.0.0.1:18923`（因 Windows 上 AF_UNIX 有完整性级别校验，会阻止非提权 GUI 访问提权守护进程的 socket）。
+
+---
+
+## 配置与数据目录
+
+各平台的数据目录布局（Bundle ID 为 `com.lmvpn.client`）：
+
+| 平台 | 配置/数据 | 缓存 | 日志 |
+|------|----------|------|------|
+| macOS | `~/Library/Application Support/com.lmvpn.client/` | `~/Library/Caches/com.lmvpn.client/` | `~/Library/Logs/com.lmvpn.client/` |
+| Windows | `%APPDATA%\com.lmvpn.client\` | `%LOCALAPPDATA%\com.lmvpn.client\` | 同数据目录下 `log/` |
+| Linux | `~/.local/share/com.lmvpn.client/` | `~/.cache/com.lmvpn.client/` | `~/.local/state/com.lmvpn.client/log/` |
+
+- 配置文件支持 TOML 与 YAML 两种格式（`internal/config`）
+- 服务器配置（Profile）存储于 SQLite 数据库（`internal/db`，使用纯 Go 的 `modernc.org/sqlite`，无需 CGO）
+- 凭据保存于系统密钥链（macOS Keychain / Windows Credential Manager / Linux 内存）
+
+---
+
+## 架构概览
+
+### 双进程设计
+
+```
+┌──────────────┐   IPC (Unix socket / TCP)   ┌──────────────┐
+│   lmvpn      │ ◄─────────────────────────► │   lmvpnd     │
+│   (GUI)      │      控制命令 / 状态         │  (守护进程)   │
+│  Fyne UI     │                             │  WebSocket   │
+│  普通用户     │                             │  TUN 网卡    │
+│              │                             │  root/管理员  │
+└──────────────┘                             └──────┬───────┘
+                                                    │
+                                              WebSocket (ws/wss)
+                                                    ▼
+                                              ┌──────────────┐
+                                              │  LMVPN 服务端 │
+                                              └──────────────┘
+```
+
+拆分 GUI 与守护进程的原因：避免 Fyne（及其 locale/字体初始化）加载进 root 进程，同时让提权范围最小化——仅守护进程需要 root 权限操作网卡与路由。
+
+### 目录结构
+
+```
+lmvpn_client/
+├── cmd/
+│   ├── lmvpn/          # GUI 入口
+│   └── lmvpnd/         # 守护进程入口
+├── internal/
+│   ├── auth/           # 认证（JWT / 用户名密码）
+│   ├── config/         # 配置文件解析（TOML / YAML）
+│   ├── daemon/         # 守护进程生命周期、IPC、提权拉起
+│   ├── db/             # SQLite 存储、Profile、日志记录
+│   ├── i18n/           # 国际化（en / zh-Hans）
+│   ├── ipc/            # GUI ↔ 守护进程 IPC 协议
+│   ├── keychain/       # 密钥链（darwin/windows/other）
+│   ├── log/            # 日志（lumberjack 轮转）
+│   ├── model/          # 数据模型
+│   ├── paths/          # 平台路径解析（darwin/windows/other）
+│   ├── protocol/       # 与服务端的 WebSocket 协议
+│   ├── route/          # 路由管理（全隧道/代理CIDR/绕过CIDR）
+│   ├── stats/          # 流量统计
+│   ├── transport/      # WebSocket 传输层
+│   ├── tun/            # TUN 虚拟网卡（darwin/linux/windows）
+│   ├── ui/             # Fyne 界面、托盘、提权、Dock
+│   ├── version/        # 版本号（链接期注入）
+│   └── vpn/            # VPN 会话管理
+├── resources/          # 图标、Info.plist、wintun.dll、资源生成器
+├── installer/          # Inno Setup 安装脚本（lmvpn.iss）
+├── docs/               # 开发文档（协议规范）
+└── Makefile
+```
+
+### 平台适配约定
+
+项目使用 Go 文件后缀构建约束实现平台适配，主要分布：
+
+| 模块 | macOS | Windows | Linux |
+|------|-------|---------|-------|
+| `tun` | `tun_darwin.go`（water/utun） | `tun_windows.go`（wintun + embed dll） | `tun_linux.go`（water/tun） |
+| `route` | `route_darwin.go`（`route`） | `route_windows.go`（`route`） | `route_linux.go`（`ip route`） |
+| `keychain` | `keychain_darwin.go`（Keychain） | `keychain_windows.go`（Credential Manager） | `keychain_other.go`（内存） |
+| `paths` | `paths_darwin.go` | `paths_windows.go` | `paths_other.go`（XDG） |
+| `daemon` 提权 | `launch_unix.go` + osascript | `launch_windows.go` + UAC runas | `launch_unix.go` + pkexec |
+| `ui` Dock | `dock_darwin.go`（Cocoa CGO） | `dock_other.go`（no-op） | `dock_other.go`（no-op） |
+
+---
+
+## 开发指南
+
+```bash
+# 静态检查
+make vet
+
+# 格式化
+make fmt
+
+# 整理依赖
+make tidy
+
+# 清理构建产物
+make clean
+```
+
+### 添加新平台适配
+
+如需适配新的平台能力，参考现有约定新增带构建约束的文件，例如：
+
+- TUN 实现 → `internal/tun/tun_<os>.go`
+- 路由命令 → `internal/route/route_<os>.go`
+- 密钥存储 → `internal/keychain/keychain_<os>.go`
+- 路径解析 → `internal/paths/paths_<os>.go`
+
+### 协议规范
+
+客户端与服务端的完整通信协议见 [`docs/client-development.md`](docs/client-development.md)（含认证、握手、数据面、心跳、错误码等）。
+
+---
+
+## 注意事项
+
+- **不支持移动端**：虽 Fyne 支持 Android/iOS，本项目未配置移动端构建目标与适配代码
+- **Windows 仅 x64**：交叉编译仅目标 `GOARCH=amd64`，内置的 `wintun.dll` 为 x64 版本
+- **Linux 密钥链待完善**：当前为内存存储，凭据不持久化，生产环境建议接入 Secret Service
+- **CI/CD**：通过 GitHub Actions 自动构建 macOS / Windows 产物并发布 Release（见 [`.github/workflows/release.yml`](.github/workflows/release.yml)），打 `v*` tag 即触发
+- **CGO 必开**：任何平台都不可关闭 CGO，否则 Fyne 无法编译
+- **版本一致性**：GUI 与守护进程共享同一版本字符串，若版本不一致通常意味着旧守护进程仍在运行
+
+---
+
+## 许可证
+
+详见仓库 LICENSE 文件。

docs/client-development.md

@@ -294,7 +294,7 @@ sequenceDiagram
 
 ### 5.2 IP 分配规则
 
-服务端从 VPN 子网中分配客户端内网 IP（`internal/vpn/alloc.go:39-66`、`internal/vpn/service.go:47-57`）：
+服务端从 VPN 子网中分配客户端内网 IP（`internal/vpn/alloc.go:39-66`、`internal/vpn/service.go:47-58`）：
 
 | 地址 | 分配规则 | 说明 |
 |------|----------|------|
@@ -308,9 +308,19 @@ sequenceDiagram
 - 若该用户有预留 IP，优先使用预留；预留被占用时报错（`alloc.go:43-48`）
 - 地址耗尽时报错 "可用 IP 地址已耗尽"（`alloc.go:65`）
 
+#### IPv6 双栈
+
+当服务端配置了 IPv6 子网（`Subnet6`）时，客户端同时获得 IPv4 和 IPv6 地址：
+
+- IPv4 地址始终分配（`Subnet` 必填）
+- IPv6 地址仅当 `Subnet6` 非空时分配（可选）
+- IPv6 预留独立于 IPv4 预留，可单独配置
+- IPv6 子网前缀限制：`/64` ~ `/126`
+- 对于 `/64` 等大子网，`cidr.AddressCount` 会溢出，实际扫描上限为 65536 个地址
+
 ### 5.3 init 消息
 
-前置检查通过后，服务端发送 `init` 文本消息（`internal/vpn/tunnel.go:126-137`）：
+前置检查通过后，服务端发送 `init` 文本消息（`internal/vpn/tunnel.go:132-148`）：
 
 ```json
 {
@@ -318,17 +328,25 @@ sequenceDiagram
   "ip": "10.0.0.5",
   "prefix": 24,
   "mtu": 1420,
-  "server_ip": "10.0.0.1"
+  "server_ip": "10.0.0.1",
+  "ip6": "fd00:dead:beef::5",
+  "prefix6": 112,
+  "server_ip6": "fd00:dead:beef::1"
 }
 ```
 
-| 字段 | 类型 | 说明 | 源码 |
-|------|------|------|------|
-| `type` | string | 固定值 `"init"` | `internal/vpn/protocol.go:3-9` |
-| `ip` | string | 分配给客户端的内网 IP（点分十进制） | `tunnel.go:130` |
-| `prefix` | int | 子网前缀长度（如 `24`） | `tunnel.go:131` |
-| `mtu` | int | TUN 网卡 MTU | `tunnel.go:132` |
-| `server_ip` | string | 服务器内网 IP（对端地址） | `tunnel.go:133` |
+| 字段 | 类型 | 必填 | 说明 | 源码 |
+|------|------|------|------|------|
+| `type` | string | 是 | 固定值 `"init"` | `internal/vpn/protocol.go:3-10` |
+| `ip` | string | 是 | 分配给客户端的 IPv4 地址 | `tunnel.go:136` |
+| `prefix` | int | 是 | IPv4 子网前缀长度（如 `24`） | `tunnel.go:137` |
+| `mtu` | int | 是 | TUN 网卡 MTU | `tunnel.go:138` |
+| `server_ip` | string | 是 | 服务器 IPv4 地址 | `tunnel.go:139` |
+| `ip6` | string | 否 | 分配给客户端的 IPv6 地址（仅当服务端配置了 IPv6 子网时存在） | `tunnel.go:141-144` |
+| `prefix6` | int | 否 | IPv6 子网前缀长度 | `tunnel.go:142` |
+| `server_ip6` | string | 否 | 服务器 IPv6 地址 | `tunnel.go:143` |
+
+> ℹ️ `ip6`/`prefix6`/`server_ip6` 字段使用 `omitempty`，旧客户端可安全忽略。若服务端未配置 IPv6 子网，这三个字段不会出现。
 
 ### 5.4 ready 消息与超时
 
@@ -412,14 +430,14 @@ sequenceDiagram
 
 ### 6.4 反欺骗（Anti-Spoofing）
 
-服务端**强制校验**每个来自客户端的 IP 包的源地址（`internal/vpn/switch.go:113-116`）：
+服务端**强制校验**每个来自客户端的 IP 包的源地址（`internal/vpn/switch.go:113-126`）：
 
-```
-if 源IP != 该客户端被分配的IP:
-    丢弃该包（不转发，不写入TUN，不断开连接）
-```
+- **IPv4 包**：源地址必须等于客户端被分配的 IPv4 地址（`init.ip`）
+- **IPv6 包**：源地址必须等于客户端被分配的 IPv6 地址（`init.ip6`）
 
-> ⚠️ 客户端必须确保 TUN 网卡只发送源地址为 `init.ip` 的 IP 包。若客户端配置错误导致源 IP 不匹配，所有上行包将被静默丢弃。
+不匹配的包将被静默丢弃（不转发、不写入 TUN、不断开连接）。
+
+> ⚠️ 客户端必须确保 TUN 网卡只发送源地址与 `init.ip` / `init.ip6` 匹配的 IP 包。若客户端配置错误导致源 IP 不匹配，所有上行包将被静默丢弃。
 
 ### 6.5 非 IP 二进制帧
 
@@ -488,9 +506,11 @@ conn.WriteControl(websocket.PingMessage, nil, ...)
 
 | 约束 | 值 | 源码 |
 |------|----|----|
-| IP 版本 | 仅 IPv4 | `internal/handler/vpn.go:66-73` |
-| 前缀长度 | ≤ /30 | `internal/handler/vpn.go:74-78` |
+| IPv4 版本 | 仅 IPv4 | `internal/handler/vpn.go:66-73` |
+| IPv4 前缀长度 | ≤ /30 | `internal/handler/vpn.go:74-78` |
+| IPv6 前缀长度 | /64 ~ /126 | `internal/handler/vpn.go:81-92` |
 | 可用容量 | `AddressCount - 3` | `internal/vpn/alloc.go:106-112` |
+| IPv6 大子网容量 | ~65533（/64 等大子网 AddressCount 溢出时） | `internal/vpn/alloc.go:108-110` |
 
 ### 8.4 MTU 约束
 
@@ -516,7 +536,7 @@ type controlMessage struct {
 }
 ```
 
-`init` 消息结构较为特殊（`internal/vpn/protocol.go:3-9`）：
+`init` 消息结构较为特殊（`internal/vpn/protocol.go:3-10`）：
 
 ```go
 type initMessage struct {
@@ -525,6 +545,9 @@ type initMessage struct {
     Prefix    int    `json:"prefix"`
     MTU       int    `json:"mtu"`
     ServerIP  string `json:"server_ip"`
+    IP6       string `json:"ip6,omitempty"`
+    Prefix6   int    `json:"prefix6,omitempty"`
+    ServerIP6 string `json:"server_ip6,omitempty"`
 }
 ```
 
@@ -578,7 +601,7 @@ type initMessage struct {
 |------|----------------|------|------|------|
 | `auth_ok` | Text | 密码认证成功（仅方式 B） | JSON | `{"type":"auth_ok"}` |
 | `auth_err` | Text | 认证失败 | JSON | `{"type":"auth_err","message":"..."}` |
-| `init` | Text | 认证成功且前置检查通过 | JSON | `{"type":"init","ip":"...","prefix":24,"mtu":1420,"server_ip":"..."}` |
+| `init` | Text | 认证成功且前置检查通过 | JSON | `{"type":"init","ip":"...","prefix":24,"mtu":1420,"server_ip":"...","ip6":"...","prefix6":112,"server_ip6":"..."}` |
 | `error` | Text | 握手阶段失败 | JSON | `{"type":"error","message":"..."}` |
 | 数据帧 | Binary | `ready` 之后，下行 IP 包 | 原始 IP 包 | （二进制） |
 | Ping | WebSocket Ping | 每 30 秒 | 空 | （WebSocket 协议层） |
@@ -593,9 +616,11 @@ type initMessage struct {
 
 | 配置项 | 取值来源 | 说明 |
 |--------|----------|------|
-| TUN 网卡地址 | `init.ip` / `init.prefix` | 如 `10.0.0.5/24` |
+| TUN 网卡地址 (IPv4) | `init.ip` / `init.prefix` | 如 `10.0.0.5/24` |
+| TUN 网卡地址 (IPv6) | `init.ip6` / `init.prefix6` | 如 `fd00:dead:beef::5/112`（可选，仅当 init 含 ip6 时） |
 | MTU | `init.mtu` | 如 `1420` |
-| 对端地址 / 默认路由网关 | `init.server_ip` | 如 `10.0.0.1` |
+| 对端地址 / 默认路由网关 (IPv4) | `init.server_ip` | 如 `10.0.0.1` |
+| 对端地址 (IPv6) | `init.server_ip6` | 如 `fd00:dead:beef::1`（可选） |
 
 ### 11.2 Linux
 
@@ -608,10 +633,17 @@ ip addr add dev <tun> <ip>/<prefix> peer <server_ip>
 ip link set dev <tun> mtu <mtu>
 ```
 
+IPv6（仅当 init 含 `ip6` 时）：
+
+```
+ip addr add dev <tun> <ip6>/<prefix6>
+```
+
 路由：若需将所有流量经 VPN，添加默认路由：
 
 ```
 ip route add 0.0.0.0/0 dev <tun>
+ip route add ::/0 dev <tun>    # IPv6 默认路由（可选）
 ```
 
 ### 11.3 macOS
@@ -623,10 +655,17 @@ ifconfig <utun> inet <ip>/<prefix> <server_ip> up
 ifconfig <utun> mtu <mtu>
 ```
 
+IPv6（仅当 init 含 `ip6` 时）：
+
+```
+ifconfig <utun> inet6 <ip6>/<prefix6> up
+```
+
 路由：
 
 ```
 route add -inet -net 0.0.0.0/0 -interface <utun>
+route add -inet6 -net ::/0 -interface <utun>    # IPv6 默认路由（可选）
 ```
 
 > macOS 的 utun 接口由系统分配编号（如 `utun4`），客户端通常无法指定名称。
@@ -670,6 +709,12 @@ Linux 服务端须开启 IP 转发（`internal/vpn/diag_linux.go:53-60`）：
 sysctl -w net.ipv4.ip_forward=1
 ```
 
+IPv6 双栈场景还须开启 IPv6 转发（`internal/vpn/diag_linux.go:116-122`）：
+
+```
+sysctl -w net.ipv6.conf.all.forwarding=1
+```
+
 ### 12.2 NAT 伪装
 
 服务端须配置 NAT masquerade，将客户端源 IP 转换为服务器物理网卡 IP（`internal/vpn/diag_linux.go:80-113`）。
@@ -688,7 +733,19 @@ nft add rule ip nat postrouting oifname <物理网卡> masquerade
 iptables -t nat -A POSTROUTING -o <物理网卡> -j MASQUERADE
 ```
 
-> 服务端诊断接口 `GET /api/admin/vpn/diag`（`internal/handler/vpn.go:190-192`）会检测上述配置，客户端无法上网时可请管理员查看诊断结果。
+IPv6 NAT66（仅双栈场景需要）：
+
+**nft**：
+```
+nft add rule inet lmvpn_nat postrouting oifname <物理网卡> ip6 saddr <VPN_V6_SUBNET> masquerade
+```
+
+**ip6tables（回退）**：
+```
+ip6tables -t nat -A POSTROUTING -s <VPN_V6_SUBNET> -o <物理网卡> -j MASQUERADE
+```
+
+> 服务端诊断接口 `GET /api/admin/vpn/diag`（`internal/handler/vpn.go:190-192`）会检测上述配置（含 IPv6），客户端无法上网时可请管理员查看诊断结果。
 
 ### 12.3 子网与 MTU
 

go.mod

@@ -4,10 +4,12 @@ go 1.26
 
 require (
 	github.com/BurntSushi/toml v1.5.0
+	github.com/danieljoos/wincred v1.2.3
 	github.com/gorilla/websocket v1.5.3
 	github.com/jeandeaual/go-locale v0.0.0-20250612000132-0ef82f21eade
 	github.com/nicksnyder/go-i18n/v2 v2.5.1
 	github.com/songgao/water v0.0.0-20200317203138-2b4b6d7c09d8
+	golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2
 	gopkg.in/natefinch/lumberjack.v2 v2.2.1
 	gopkg.in/yaml.v3 v3.0.1
 	modernc.org/sqlite v1.34.1
@@ -54,7 +56,7 @@ require (
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/ncruces/go-strftime v0.1.9 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
-	golang.org/x/sys v0.46.0 // indirect
+	golang.org/x/sys v0.46.0
 	modernc.org/gc/v3 v3.0.0-20240107210532-573471604cb6 // indirect
 	modernc.org/libc v1.55.3 // indirect
 	modernc.org/mathutil v1.6.0 // indirect

go.sum

@@ -4,6 +4,8 @@ fyne.io/systray v1.12.1 h1:ygBD6aZXwiOmZoY5N+ukbH9pih0Kq6fYgVeMYbr5skQ=
 fyne.io/systray v1.12.1/go.mod h1:RVwqP9nYMo7h5zViCBHri2FgjXF7H2cub7MAq4NSoLs=
 github.com/BurntSushi/toml v1.5.0 h1:W5quZX/G/csjUnuI8SUYlsHs9M38FC7znL0lIO+DvMg=
 github.com/BurntSushi/toml v1.5.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
+github.com/danieljoos/wincred v1.2.3 h1:v7dZC2x32Ut3nEfRH+vhoZGvN72+dQ/snVXo/vMFLdQ=
+github.com/danieljoos/wincred v1.2.3/go.mod h1:6qqX0WNrS4RzPZ1tnroDzq9kY3fu1KwE7MRLQK4X0bs=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
@@ -83,6 +85,8 @@ github.com/srwiley/oksvg v0.0.0-20221011165216-be6e8873101c h1:km8GpoQut05eY3GiY
 github.com/srwiley/oksvg v0.0.0-20221011165216-be6e8873101c/go.mod h1:cNQ3dwVJtS5Hmnjxy6AgTPd0Inb3pW05ftPSX7NZO7Q=
 github.com/srwiley/rasterx v0.0.0-20220730225603-2ab79fcdd4ef h1:Ch6Q+AZUxDBCVqdkI8FSpFyZDtCVBc2VmejdNrm5rRQ=
 github.com/srwiley/rasterx v0.0.0-20220730225603-2ab79fcdd4ef/go.mod h1:nXTWP6+gD5+LUJ8krVhhoeHjvHTutPxMYl5SvkcnJNE=
+github.com/stretchr/objx v0.5.2 h1:xuMeJ0Sdp5ZMRXx/aWO6RZxdr3beISkG5/G/aIRr3pY=
+github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/8L+MA=
 github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
 github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
 github.com/yuin/goldmark v1.7.8 h1:iERMLn0/QJeHFhxSt3p6PeN9mGnvIKSpG9YYorDMnic=
@@ -102,6 +106,8 @@ golang.org/x/text v0.22.0 h1:bofq7m3/HAFvbF51jz3Q9wLg3jkvSPuiZu/pD1XwgtM=
 golang.org/x/text v0.22.0/go.mod h1:YRoo4H8PVmsu+E3Ou7cqLVH8oXWIHVoX0jqUWALQhfY=
 golang.org/x/tools v0.24.1 h1:vxuHLTNS3Np5zrYoPRpcheASHX/7KiGo+8Y4ZM1J2O8=
 golang.org/x/tools v0.24.1/go.mod h1:YhNqVBIfWHdzvTLs0d8LCuMhkKUgSUKldakyV7W/WDQ=
+golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2 h1:B82qJJgjvYKsXS9jeunTOisW56dUokqW/FOteYJJ/yg=
+golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2/go.mod h1:deeaetjYA+DHMHg+sMSMI58GrEteJUUzzw7en6TJQcI=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f h1:BLraFXnmrev5lT+xlilqcH8XK9/i0At2xKjWk4p6zsU=
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installer/ChineseSimplified.isl

@@ -0,0 +1,417 @@
+; *** Inno Setup version 6.5.0+ Chinese Simplified messages ***
+;
+; To download user-contributed translations of this file, go to:
+;   https://jrsoftware.org/files/istrans/
+;
+; Note: When translating this text, do not add periods (.) to the end of
+; messages that didn't have them already, because on those messages Inno
+; Setup adds the periods automatically (appending a period would result in
+; two periods being displayed).
+;
+; Maintainer: Zhenghan Yang (Kira)
+; Email: 847320916@QQ.com
+; Github: https://github.com/kira-96/Inno-Setup-Chinese-Simplified-Translation
+; Encoding: UTF-8
+; Translation based on network resource
+;
+
+[LangOptions]
+; The following three entries are very important. Be sure to read and
+; understand the '[LangOptions] section' topic in the help file.
+LanguageName=简体中文
+; About LanguageID, to reference link:
+; https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-lcid/a9eac961-e77d-41a6-90a5-ce1a8b0cdb9c
+LanguageID=$0804
+; LanguageCodePage should always be set if possible, even if this file is Unicode
+; For English it's set to zero anyway because English only uses ASCII characters
+LanguageCodePage=936
+; If the language you are translating to requires special font faces or
+; sizes, uncomment any of the following entries and change them accordingly.
+;DialogFontName=
+;DialogFontSize=9
+;DialogFontBaseScaleWidth=7
+;DialogFontBaseScaleHeight=15
+;WelcomeFontName=Segoe UI
+;WelcomeFontSize=14
+
+[Messages]
+
+; *** Application titles
+SetupAppTitle=安装
+SetupWindowTitle=安装 - %1
+UninstallAppTitle=卸载
+UninstallAppFullTitle=%1 卸载
+
+; *** Misc. common
+InformationTitle=信息
+ConfirmTitle=确认
+ErrorTitle=错误
+
+; *** SetupLdr messages
+SetupLdrStartupMessage=现在将安装 %1。您想要继续吗？
+LdrCannotCreateTemp=无法创建临时文件。安装程序已中止
+LdrCannotExecTemp=无法执行临时目录中的文件。安装程序已中止
+HelpTextNote=
+
+; *** Startup error messages
+LastErrorMessage=%1。%n%n错误 %2: %3
+SetupFileMissing=安装目录中缺少文件 %1。请修正这个问题或者获取程序的新副本。
+SetupFileCorrupt=安装文件已损坏。请获取程序的新副本。
+SetupFileCorruptOrWrongVer=安装文件已损坏，或是与这个安装程序的版本不兼容。请修正这个问题或获取新的程序副本。
+InvalidParameter=无效的命令行参数：%n%n%1
+SetupAlreadyRunning=安装程序已在运行。
+WindowsVersionNotSupported=此程序不支持当前计算机运行的 Windows 版本。
+WindowsServicePackRequired=此程序需要 %1 服务包 %2 或更高版本。
+NotOnThisPlatform=此程序不能在 %1 上运行。
+OnlyOnThisPlatform=此程序只能在 %1 上运行。
+OnlyOnTheseArchitectures=此程序只能安装到为下列处理器架构设计的 Windows 版本中：%n%n%1
+WinVersionTooLowError=此程序需要 %1 版本 %2 或更高。
+WinVersionTooHighError=此程序不能安装于 %1 版本 %2 或更高。
+AdminPrivilegesRequired=在安装此程序时您必须以管理员身份登录。
+PowerUserPrivilegesRequired=在安装此程序时您必须以管理员身份或高级用户组身份登录。
+SetupAppRunningError=安装程序检测到 %1 当前正在运行。%n%n请先关闭正在运行的程序，然后点击“确定”继续，或点击“取消”退出。
+UninstallAppRunningError=卸载程序检测到 %1 当前正在运行。%n%n请先关闭正在运行的程序，然后点击“确定”继续，或点击“取消”退出。
+
+; *** Startup questions
+PrivilegesRequiredOverrideTitle=选择安装程序安装模式
+PrivilegesRequiredOverrideInstruction=选择安装模式
+PrivilegesRequiredOverrideText1=%1 可以为所有用户安装（需要管理员权限），或仅为您安装。
+PrivilegesRequiredOverrideText2=%1 可以仅为您安装，或为所有用户安装（需要管理员权限）。
+PrivilegesRequiredOverrideAllUsers=为所有用户安装(&A)
+PrivilegesRequiredOverrideAllUsersRecommended=为所有用户安装(&A)（推荐）
+PrivilegesRequiredOverrideCurrentUser=仅为我安装(&M)
+PrivilegesRequiredOverrideCurrentUserRecommended=仅为我安装(&M)（推荐）
+
+; *** Misc. errors
+ErrorCreatingDir=安装程序无法创建目录“%1”
+ErrorTooManyFilesInDir=无法在目录“%1”中创建文件，因为里面包含太多文件
+
+; *** Setup common messages
+ExitSetupTitle=退出安装程序
+ExitSetupMessage=安装程序尚未完成。如果现在退出，将不会安装该程序。%n%n您之后可以再次运行安装程序完成安装。%n%n现在退出安装程序吗？
+AboutSetupMenuItem=关于安装程序(&A)...
+AboutSetupTitle=关于安装程序
+AboutSetupMessage=%1 版本 %2%n%3%n%n%1 主页：%n%4
+AboutSetupNote=
+TranslatorNote=简体中文翻译由 Kira（847320916@qq.com）维护。项目地址：https://github.com/kira-96/Inno-Setup-Chinese-Simplified-Translation
+
+; *** Buttons
+ButtonBack=< 上一步(&B)
+ButtonNext=下一步(&N) >
+ButtonInstall=安装(&I)
+ButtonOK=确定
+ButtonCancel=取消
+ButtonYes=是(&Y)
+ButtonYesToAll=全是(&A)
+ButtonNo=否(&N)
+ButtonNoToAll=全否(&O)
+ButtonFinish=完成(&F)
+ButtonBrowse=浏览(&B)...
+ButtonWizardBrowse=浏览(&R)...
+ButtonNewFolder=新建文件夹(&M)
+
+; *** "Select Language" dialog messages
+SelectLanguageTitle=选择安装语言
+SelectLanguageLabel=选择安装时使用的语言。
+
+; *** Common wizard text
+ClickNext=点击“下一步”继续，或点击“取消”退出安装程序。
+BeveledLabel=
+BrowseDialogTitle=浏览文件夹
+BrowseDialogLabel=在下面的列表中选择一个文件夹，然后点击“确定”。
+NewFolderName=新建文件夹
+
+; *** "Welcome" wizard page
+WelcomeLabel1=欢迎使用 [name] 安装向导
+WelcomeLabel2=即将在您的计算机上安装 [name/ver]。%n%n建议您在继续安装前关闭所有其他应用程序。
+
+; *** "Password" wizard page
+WizardPassword=密码
+PasswordLabel1=此安装程序需要密码验证。
+PasswordLabel3=请输入密码，然后点击“下一步”继续。密码区分大小写。
+PasswordEditLabel=密码(&P)：
+IncorrectPassword=您输入的密码不正确，请重新输入。
+
+; *** "License Agreement" wizard page
+WizardLicense=许可协议
+LicenseLabel=请在继续安装前阅读以下重要信息。
+LicenseLabel3=请阅读下列许可协议。在继续安装前您必须同意这些协议条款。
+LicenseAccepted=我同意此协议(&A)
+LicenseNotAccepted=我不同意此协议(&D)
+
+; *** "Information" wizard pages
+WizardInfoBefore=信息
+InfoBeforeLabel=请在继续安装前阅读以下重要信息。
+InfoBeforeClickLabel=准备好继续安装后，点击“下一步”。
+WizardInfoAfter=信息
+InfoAfterLabel=请在继续安装前阅读以下重要信息。
+InfoAfterClickLabel=准备好继续安装后，点击“下一步”。
+
+; *** "User Information" wizard page
+WizardUserInfo=用户信息
+UserInfoDesc=请输入您的信息。
+UserInfoName=用户名(&U)：
+UserInfoOrg=组织(&O)：
+UserInfoSerial=序列号(&S)：
+UserInfoNameRequired=请输入用户名。
+
+; *** "Select Destination Location" wizard page
+WizardSelectDir=选择目标位置
+SelectDirDesc=您想将 [name] 安装在哪里？
+SelectDirLabel3=安装程序将安装 [name] 到下面的文件夹中。
+SelectDirBrowseLabel=点击“下一步”继续。如果您想选择其他文件夹，点击“浏览”。
+DiskSpaceGBLabel=至少需要有 [gb] GB 的可用磁盘空间。
+DiskSpaceMBLabel=至少需要有 [mb] MB 的可用磁盘空间。
+CannotInstallToNetworkDrive=安装程序无法安装到一个网络驱动器。
+CannotInstallToUNCPath=安装程序无法安装到一个 UNC 路径。
+InvalidPath=您必须输入一个带驱动器盘符的完整路径，例如：%n%nC:\App%n%n或UNC路径：%n%n\\server\share
+InvalidDrive=您选定的驱动器或 UNC 共享不存在或不能访问。请选择其他位置。
+DiskSpaceWarningTitle=磁盘空间不足
+DiskSpaceWarning=安装程序至少需要 %1 KB 的可用空间才能安装，但选定驱动器只有 %2 KB 的可用空间。%n%n您确定要继续吗？
+DirNameTooLong=文件夹名称或路径太长。
+InvalidDirName=文件夹名称无效。
+BadDirName32=文件夹名称不能包含下列任何字符：%n%n%1
+DirExistsTitle=文件夹已存在
+DirExists=文件夹：%n%n%1%n%n已经存在。您确定安装到这个文件夹中吗？
+DirDoesntExistTitle=文件夹不存在
+DirDoesntExist=文件夹：%n%n%1%n%n不存在。您想要创建此文件夹吗？
+
+; *** "Select Components" wizard page
+WizardSelectComponents=选择组件
+SelectComponentsDesc=您想安装哪些程序组件？
+SelectComponentsLabel2=选中您想安装的组件；取消您不想安装的组件。然后点击“下一步”继续。
+FullInstallation=完全安装
+; if possible don't translate 'Compact' as 'Minimal' (I mean 'Minimal' in your language)
+CompactInstallation=简洁安装
+CustomInstallation=自定义安装
+NoUninstallWarningTitle=组件已存在
+NoUninstallWarning=安装程序检测到下列组件已安装在您的计算机中：%n%n%1%n%n取消选中这些组件不会卸载它们。%n%n您确定要继续吗？
+ComponentSize1=%1 KB
+ComponentSize2=%1 MB
+ComponentsDiskSpaceGBLabel=当前选择的组件需要至少 [gb] GB 的磁盘空间。
+ComponentsDiskSpaceMBLabel=当前选择的组件需要至少 [mb] MB 的磁盘空间。
+
+; *** "Select Additional Tasks" wizard page
+WizardSelectTasks=选择附加任务
+SelectTasksDesc=您想要安装程序执行哪些附加任务？
+SelectTasksLabel2=选择您想要安装程序在安装 [name] 时执行的附加任务，然后点击“下一步”。
+
+; *** "Select Start Menu Folder" wizard page
+WizardSelectProgramGroup=选择开始菜单文件夹
+SelectStartMenuFolderDesc=安装程序应该在哪里放置程序的快捷方式？
+SelectStartMenuFolderLabel3=安装程序将在下列“开始”菜单文件夹中创建程序的快捷方式。
+SelectStartMenuFolderBrowseLabel=点击“下一步”继续。如果您想选择其他文件夹，点击“浏览”。
+MustEnterGroupName=您必须输入一个文件夹名称。
+GroupNameTooLong=文件夹名称或路径太长。
+InvalidGroupName=文件夹名称无效。
+BadGroupName=文件夹名称不能包含下列任何字符：%n%n%1
+NoProgramGroupCheck2=不创建开始菜单文件夹(&D)
+
+; *** "Ready to Install" wizard page
+WizardReady=准备安装
+ReadyLabel1=安装程序准备就绪，现在可以开始安装 [name] 到您的计算机。
+ReadyLabel2a=点击“安装”继续此安装程序。如果您想重新查看或修改任何设置，点击“上一步”。
+ReadyLabel2b=点击“安装”继续此安装程序。
+ReadyMemoUserInfo=用户信息：
+ReadyMemoDir=目标位置：
+ReadyMemoType=安装类型：
+ReadyMemoComponents=已选择组件：
+ReadyMemoGroup=开始菜单文件夹：
+ReadyMemoTasks=附加任务：
+
+; *** TDownloadWizardPage wizard page and DownloadTemporaryFile
+DownloadingLabel2=正在下载文件...
+ButtonStopDownload=停止下载(&S)
+StopDownload=您确定要停止下载吗？
+ErrorDownloadAborted=下载已中止
+ErrorDownloadFailed=下载失败：%1 %2
+ErrorDownloadSizeFailed=获取大小失败：%1 %2
+ErrorProgress=无效的进度：%1 / %2
+ErrorFileSize=文件大小错误：预期 %1，实际 %2
+
+; *** TExtractionWizardPage wizard page and ExtractArchive
+ExtractingLabel=正在提取文件...
+ButtonStopExtraction=停止提取(&S)
+StopExtraction=您确定要停止提取吗？
+ErrorExtractionAborted=提取已中止
+ErrorExtractionFailed=提取失败：%1
+
+; *** Archive extraction failure details
+ArchiveIncorrectPassword=密码不正确
+ArchiveIsCorrupted=压缩包已损坏
+ArchiveUnsupportedFormat=不支持的压缩包格式
+
+; *** "Preparing to Install" wizard page
+WizardPreparing=正在准备安装
+PreparingDesc=安装程序正在准备安装 [name] 到您的计算机。
+PreviousInstallNotCompleted=先前的程序安装或卸载未完成，需要您重启计算机以完成该安装。%n%n在重启计算机后，再次运行安装程序以完成 [name] 的安装。
+CannotContinue=安装程序不能继续。请点击“取消”退出。
+ApplicationsFound=以下应用程序正在使用将由安装程序更新的文件。建议您允许安装程序自动关闭这些应用程序。
+ApplicationsFound2=以下应用程序正在使用将由安装程序更新的文件。建议您允许安装程序自动关闭这些应用程序。安装完成后，安装程序将尝试重新启动这些应用程序。
+CloseApplications=自动关闭应用程序(&A)
+DontCloseApplications=不要关闭应用程序(&D)
+ErrorCloseApplications=安装程序无法自动关闭所有应用程序。建议您在继续之前，关闭所有在使用需要由安装程序更新的文件的应用程序。
+PrepareToInstallNeedsRestart=安装程序必须重启您的计算机。计算机重启后，请再次运行安装程序以完成 [name] 的安装。%n%n要立即重启吗？
+
+; *** "Installing" wizard page
+WizardInstalling=正在安装
+InstallingLabel=安装程序正在安装 [name] 到您的计算机，请稍候。
+
+; *** "Setup Completed" wizard page
+FinishedHeadingLabel=完成 [name] 安装向导
+FinishedLabelNoIcons=安装程序已在您的计算机中安装了 [name]。
+FinishedLabel=安装程序已在您的计算机中安装了 [name]。您可以通过已安装的快捷方式运行此应用程序。
+ClickFinish=点击“完成”退出安装程序。
+FinishedRestartLabel=为完成 [name] 的安装，安装程序必须重新启动您的计算机。要立即重启吗？
+FinishedRestartMessage=为完成 [name] 的安装，安装程序必须重新启动您的计算机。%n%n要立即重启吗？
+ShowReadmeCheck=是，我想查阅自述文件
+YesRadio=是，立即重启计算机(&Y)
+NoRadio=否，稍后重启计算机(&N)
+; used for example as 'Run MyProg.exe'
+RunEntryExec=运行 %1
+; used for example as 'View Readme.txt'
+RunEntryShellExec=查阅 %1
+
+; *** "Setup Needs the Next Disk" stuff
+ChangeDiskTitle=安装程序需要下一张磁盘
+SelectDiskLabel2=请插入磁盘 %1 并点击“确定”。%n%n如果这个磁盘中的文件可以在下列文件夹之外的文件夹中找到，请输入正确的路径或点击“浏览”。
+PathLabel=路径(&P)：
+FileNotInDir2=“%2”中找不到文件“%1”。请插入正确的磁盘或选择其他文件夹。
+SelectDirectoryLabel=请指定下一张磁盘的位置。
+
+; *** Installation phase messages
+SetupAborted=安装程序未完成安装。%n%n请修正这个问题并重新运行安装程序。
+AbortRetryIgnoreSelectAction=选择操作
+AbortRetryIgnoreRetry=重试(&T)
+AbortRetryIgnoreIgnore=忽略错误并继续(&I)
+AbortRetryIgnoreCancel=取消安装
+RetryCancelSelectAction=选择操作
+RetryCancelRetry=重试(&T)
+RetryCancelCancel=取消
+
+; *** Installation status messages
+StatusClosingApplications=正在关闭应用程序...
+StatusCreateDirs=正在创建目录...
+StatusExtractFiles=正在提取文件...
+StatusDownloadFiles=正在下载文件...
+StatusCreateIcons=正在创建快捷方式...
+StatusCreateIniEntries=正在创建 INI 条目...
+StatusCreateRegistryEntries=正在创建注册表条目...
+StatusRegisterFiles=正在注册文件...
+StatusSavingUninstall=正在保存卸载信息...
+StatusRunProgram=正在完成安装...
+StatusRestartingApplications=正在重启应用程序...
+StatusRollback=正在撤销更改...
+
+; *** Misc. errors
+ErrorInternal2=内部错误：%1
+ErrorFunctionFailedNoCode=%1 失败
+ErrorFunctionFailed=%1 失败；错误代码 %2
+ErrorFunctionFailedWithMessage=%1 失败；错误代码 %2.%n%3
+ErrorExecutingProgram=无法执行文件：%n%1
+
+; *** Registry errors
+ErrorRegOpenKey=打开注册表项时出错：%n%1\%2
+ErrorRegCreateKey=创建注册表项时出错：%n%1\%2
+ErrorRegWriteKey=写入注册表项时出错：%n%1\%2
+
+; *** INI errors
+ErrorIniEntry=在文件“%1”中创建 INI 条目时出错。
+
+; *** File copying errors
+FileAbortRetryIgnoreSkipNotRecommended=跳过此文件(&S)（不推荐）
+FileAbortRetryIgnoreIgnoreNotRecommended=忽略错误并继续(&I)（不推荐）
+SourceIsCorrupted=源文件已损坏
+SourceDoesntExist=源文件“%1”不存在
+SourceVerificationFailed=源文件验证失败：%1
+VerificationSignatureDoesntExist=签名文件“%1”不存在
+VerificationSignatureInvalid=签名文件“%1”无效
+VerificationKeyNotFound=签名文件“%1”使用了未知的密钥
+VerificationFileNameIncorrect=文件名不正确
+VerificationFileTagIncorrect=文件标签不正确
+VerificationFileSizeIncorrect=文件大小不正确
+VerificationFileHashIncorrect=文件哈希值不正确
+ExistingFileReadOnly2=无法替换已存在的文件，它是只读的。
+ExistingFileReadOnlyRetry=移除只读属性并重试(&R)
+ExistingFileReadOnlyKeepExisting=保留已存在的文件(&K)
+ErrorReadingExistingDest=尝试读取已存在的文件时出错：
+FileExistsSelectAction=选择操作
+FileExists2=文件已经存在。
+FileExistsOverwriteExisting=覆盖已存在的文件(&O)
+FileExistsKeepExisting=保留已存在的文件(&K)
+FileExistsOverwriteOrKeepAll=为接下来的冲突文件执行此操作(&D)
+ExistingFileNewerSelectAction=选择操作
+ExistingFileNewer2=已存在的文件比安装程序将要安装的文件还要新。
+ExistingFileNewerOverwriteExisting=覆盖已存在的文件(&O)
+ExistingFileNewerKeepExisting=保留已存在的文件(&K)（推荐）
+ExistingFileNewerOverwriteOrKeepAll=为接下来的冲突文件执行此操作(&D)
+ErrorChangingAttr=尝试更改下列已存在的文件属性时出错：
+ErrorCreatingTemp=尝试在目标目录创建文件时出错：
+ErrorReadingSource=尝试读取下列源文件时出错：
+ErrorCopying=尝试复制下列文件时出错：
+ErrorDownloading=尝试下载文件时出错：
+ErrorExtracting=尝试提取压缩包时出错：
+ErrorReplacingExistingFile=尝试替换已存在的文件时出错：
+ErrorRestartReplace=重启并替换失败：
+ErrorRenamingTemp=尝试重命名下列目标目录中的一个文件时出错：
+ErrorRegisterServer=无法注册 DLL/OCX：%1
+ErrorRegSvr32Failed=RegSvr32 失败；退出代码 %1
+ErrorRegisterTypeLib=无法注册类型库：%1
+
+; *** Uninstall display name markings
+; used for example as 'My Program (32-bit)'
+UninstallDisplayNameMark=%1 (%2)
+; used for example as 'My Program (32-bit, All users)'
+UninstallDisplayNameMarks=%1 (%2, %3)
+UninstallDisplayNameMark32Bit=32 位
+UninstallDisplayNameMark64Bit=64 位
+UninstallDisplayNameMarkAllUsers=所有用户
+UninstallDisplayNameMarkCurrentUser=当前用户
+
+; *** Post-installation errors
+ErrorOpeningReadme=尝试打开自述文件时出错。
+ErrorRestartingComputer=安装程序无法重启计算机，请手动重启。
+
+; *** Uninstaller messages
+UninstallNotFound=文件“%1”不存在。无法卸载。
+UninstallOpenError=文件“%1”不能被打开。无法卸载
+UninstallUnsupportedVer=此版本的卸载程序无法识别卸载日志文件“%1”的格式。无法卸载
+UninstallUnknownEntry=卸载日志中遇到一个未知条目（%1）
+ConfirmUninstall=您确认要完全移除 %1 及其所有组件吗？
+UninstallOnlyOnWin64=仅允许在 64 位 Windows 中卸载此程序。
+OnlyAdminCanUninstall=仅使用管理员权限的用户能完成此卸载。
+UninstallStatusLabel=正在从您的计算机中移除 %1，请稍候。
+UninstalledAll=已顺利从您的计算机中移除 %1。
+UninstalledMost=%1 卸载完成。%n%n有部分内容未能被删除，但您可以手动删除它们。
+UninstalledAndNeedsRestart=为完成 %1 的卸载，需要重启您的计算机。%n%n要立即重启吗？
+UninstallDataCorrupted=文件“%1”已损坏。无法卸载
+
+; *** Uninstallation phase messages
+ConfirmDeleteSharedFileTitle=删除共享文件？
+ConfirmDeleteSharedFile2=系统表示下列共享文件已不再有任何程序使用。您希望卸载程序删除此共享文件吗？%n%n如果仍有程序正在使用此文件，删除后这些程序可能无法正常运行。如果您不能确定，请选择“否”，保留此文件在系统中不会造成任何损害。
+SharedFileNameLabel=文件名：
+SharedFileLocationLabel=位置：
+WizardUninstalling=卸载状态
+StatusUninstalling=正在卸载 %1...
+
+; *** Shutdown block reasons
+ShutdownBlockReasonInstallingApp=正在安装 %1。
+ShutdownBlockReasonUninstallingApp=正在卸载 %1。
+
+; The custom messages below aren't used by Setup itself, but if you make
+; use of them in your scripts, you'll want to translate them.
+
+[CustomMessages]
+
+NameAndVersion=%1 版本 %2
+AdditionalIcons=附加快捷方式：
+CreateDesktopIcon=创建桌面快捷方式(&D)
+CreateQuickLaunchIcon=创建快速启动栏快捷方式(&Q)
+ProgramOnTheWeb=%1 网站
+UninstallProgram=卸载 %1
+LaunchProgram=运行 %1
+AssocFileExtension=将 %2 文件扩展名与 %1 建立关联(&A)
+AssocingFileExtension=正在将 %2 文件扩展名与 %1 建立关联...
+AutoStartProgramGroupDescription=启动：
+AutoStartProgram=自动启动 %1
+AddonHostProgramNotFound=您选择的文件夹中无法找到 %1。%n%n您确定要继续吗？

installer/lmvpn.iss

@@ -0,0 +1,145 @@
+; LMVPN Windows Installer — Inno Setup script
+;
+; Build:
+;   ISCC /DAppVersion=0.3.6-abc123 installer/lmvpn.iss
+;   wine "C:\Program Files (x86)\Inno Setup 6\ISCC.exe" /DAppVersion=0.3.6-abc123 installer/lmvpn.iss
+;
+; The exes (lmvpn.exe, lmvpnd.exe) must exist in ../build/ before compiling.
+; Run `make build-windows` first (or `make installer-windows` which does both).
+
+#ifndef AppVersion
+  #define AppVersion "dev"
+#endif
+
+#define AppName       "LMVPN"
+#define AppPublisher  "LMVPN"
+#define AppExeName    "lmvpn.exe"
+#define DaemonExeName "lmvpnd.exe"
+#define AppURL        "https://github.com/lmvpn/lmvpn_client"
+
+[Setup]
+AppId={{8F7B3A2E-1D4C-4B5E-9F6A-2E3C7D8E1F0A}
+AppName={#AppName}
+AppVersion={#AppVersion}
+AppVerName={#AppName} {#AppVersion}
+AppPublisher={#AppPublisher}
+AppPublisherURL={#AppURL}
+AppSupportURL={#AppURL}
+AppUpdatesURL={#AppURL}
+DefaultDirName={autopf}\{#AppName}
+DefaultGroupName={#AppName}
+DisableProgramGroupPage=yes
+PrivilegesRequired=admin
+ArchitecturesAllowed=x64compatible
+ArchitecturesInstallIn64BitMode=x64compatible
+Compression=lzma2
+SolidCompression=yes
+WizardStyle=modern
+OutputDir=..\build
+OutputBaseFilename=LMVPN-Setup-{#AppVersion}
+SetupIconFile=..\resources\icon.ico
+UninstallDisplayIcon={app}\{#AppExeName}
+UninstallDisplayName={#AppName}
+
+[Languages]
+Name: "chinesesimp"; MessagesFile: "ChineseSimplified.isl"
+Name: "english";    MessagesFile: "compiler:Default.isl"
+
+[Tasks]
+Name: "desktopicon"; Description: "创建桌面快捷方式(&D)"; GroupDescription: "附加选项:"; Flags: unchecked
+
+[Files]
+Source: "..\build\{#AppExeName}";     DestDir: "{app}"; Flags: ignoreversion
+Source: "..\build\{#DaemonExeName}";  DestDir: "{app}"; Flags: ignoreversion
+Source: "..\resources\wintun.dll";    DestDir: "{app}"; Flags: ignoreversion
+
+[Icons]
+Name: "{group}\{#AppName}";           Filename: "{app}\{#AppExeName}"
+Name: "{group}\卸载 {#AppName}";       Filename: "{uninstallexe}"
+Name: "{commondesktop}\{#AppName}";   Filename: "{app}\{#AppExeName}"; Tasks: desktopicon
+
+[Run]
+Filename: "{app}\{#AppExeName}"; Description: "立即启动 {#AppName}"; Flags: nowait postinstall skipifsilent
+
+[UninstallDelete]
+Type: files; Name: "{app}\wintun.dll"
+
+[Code]
+
+// Kill running LMVPN processes (GUI + daemon) by image name.
+// Returns True if at least one process was found and killed.
+function KillProcess(const ExeName: String): Boolean;
+var
+  ResultCode: Integer;
+begin
+  Result := False;
+  // taskkill /IM <name> /F /T — force-kill process tree
+  if Exec(ExpandConstant('{cmd}'), '/C taskkill /IM ' + ExeName + ' /F /T',
+          '', SW_HIDE, ewWaitUntilTerminated, ResultCode) then
+  begin
+    // exit code 0 = killed, 128 = not found — both are fine
+    Result := (ResultCode = 0);
+  end;
+end;
+
+// PrepareToInstall runs before file extraction. We kill any running
+// LMVPN processes here so that the exes can be overwritten cleanly.
+function PrepareToInstall(var NeedsRestart: Boolean): String;
+begin
+  KillProcess('{#DaemonExeName}');
+  KillProcess('{#AppExeName}');
+  // Give the OS a moment to release file handles
+  Sleep(800);
+  Result := '';
+end;
+
+// Kill processes before uninstall as well.
+procedure CurUninstallStepChanged(CurUninstallStep: TUninstallStep);
+begin
+  if CurUninstallStep = usUninstall then
+  begin
+    KillProcess('{#DaemonExeName}');
+    KillProcess('{#AppExeName}');
+    Sleep(500);
+  end;
+end;
+
+// Check if a process with the given image name is currently running.
+function IsProcessRunning(const ExeName: String): Boolean;
+var
+  ResultCode: Integer;
+begin
+  Result := False;
+  // tasklist exits 0 if the process is found, 1 if not found
+  if Exec(ExpandConstant('{cmd}'), '/C tasklist /FI "IMAGENAME eq ' + ExeName + '" /NH /FO CSV | findstr /I "' + ExeName + '"',
+          '', SW_HIDE, ewWaitUntilTerminated, ResultCode) then
+    Result := (ResultCode = 0);
+end;
+
+// Warn the user if LMVPN is still running and offer to kill it
+// before proceeding from the directory selection page.
+function NextButtonClick(CurPageID: Integer): Boolean;
+begin
+  Result := True;
+  if CurPageID = wpSelectDir then
+  begin
+    if IsProcessRunning('{#AppExeName}') or IsProcessRunning('{#DaemonExeName}') then
+    begin
+      if MsgBox('{#AppName} 正在运行中，需要先关闭才能继续安装。' + #13#10 + #13#10 + '是否立即关闭？',
+                mbConfirmation, MB_YESNO) = IDYES then
+      begin
+        KillProcess('{#DaemonExeName}');
+        KillProcess('{#AppExeName}');
+        Sleep(800);
+        // Verify they're actually dead
+        if IsProcessRunning('{#AppExeName}') or IsProcessRunning('{#DaemonExeName}') then
+        begin
+          MsgBox('无法关闭 {#AppName} 进程，请手动结束任务后重试。', mbError, MB_OK);
+          Result := False;
+        end;
+      end
+      else
+        Result := False;
+    end;
+  end;
+end;

internal/auth/auth.go

@@ -6,6 +6,8 @@ package auth
 
 import (
 	"bytes"
+	"context"
+	"crypto/tls"
 	"encoding/json"
 	"fmt"
 	"io"
@@ -41,7 +43,15 @@ type errorResponse struct {
 // baseURL should be the HTTP(S) origin derived from the WebSocket URL
 // (e.g. "http://localhost:8080" for ws://, "https://vpn.example.com"
 // for wss://). See WSURLToHTTP.
-func Login(baseURL, username, password string) (*LoginResult, error) {
+//
+// tlsCfg, if non-nil, is used as the TLS configuration for the HTTP
+// client. This is essential when connecting via CDN edge IPs: the URL
+// host will be an IP address, but the certificate must be verified
+// against the real hostname (set tlsCfg.ServerName).
+//
+// ctx allows cancellation of the HTTP request (e.g. when the VPN
+// session is disconnected while login is in flight).
+func Login(ctx context.Context, baseURL, username, password string, tlsCfg *tls.Config) (*LoginResult, error) {
 	body, err := json.Marshal(loginRequest{Username: username, Password: password})
 	if err != nil {
 		return nil, err
@@ -49,7 +59,17 @@ func Login(baseURL, username, password string) (*LoginResult, error) {
 
 	url := strings.TrimRight(baseURL, "/") + "/api/login"
 	client := &http.Client{Timeout: 15 * time.Second}
-	resp, err := client.Post(url, "application/json", bytes.NewReader(body))
+	if tlsCfg != nil {
+		client.Transport = &http.Transport{TLSClientConfig: tlsCfg}
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, url, bytes.NewReader(body))
+	if err != nil {
+		return nil, fmt.Errorf("create login request: %w", err)
+	}
+	req.Header.Set("Content-Type", "application/json")
+
+	resp, err := client.Do(req)
 	if err != nil {
 		return nil, fmt.Errorf("login request: %w", err)
 	}

internal/cidrsource/cidrsource.go

@@ -0,0 +1,173 @@
+// Package cidrsource fetches CIDR lists from URLs. CIDR lists can be
+// fetched before routing is applied (via a direct connection) or after
+// the tunnel is established (via the tunnel itself).
+//
+// The expected format is one CIDR per line. Empty lines and lines
+// starting with '#' are treated as comments and skipped. Invalid CIDR
+// entries are silently ignored (with a debug log entry).
+package cidrsource
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"strings"
+	"time"
+
+	"lmvpn/internal/log"
+	"lmvpn/internal/model"
+)
+
+// fetchTimeout is the total timeout for all before-proxy fetches
+// combined. It must be well under the server's 30s ReadyTimeout since
+// before-proxy fetching happens before the WS handshake begins.
+const fetchTimeout = 5 * time.Second
+
+// FetchBeforeProxy fetches all CIDR URL sources with FetchTiming ==
+// "before". These are fetched via the system's direct connection
+// (before routing is applied), so no special proxy handling is needed.
+// The context allows cancellation (e.g. session teardown).
+//
+// All matching sources are fetched concurrently with a shared 5s
+// deadline so a single slow URL does not block the entire session.
+func FetchBeforeProxy(ctx context.Context, sources []model.CIDRURLSource) ([]string, error) {
+	return fetchSources(ctx, sources, model.FetchBefore)
+}
+
+// FetchAfterProxy fetches all CIDR URL sources with FetchTiming ==
+// "after". These are fetched via the tunnel after the data plane is up.
+// The HTTP client uses the default dialer, which respects the system
+// routing table - so when full-tunnel or bypass routes are in effect,
+// the request goes through the TUN interface.
+//
+// Sources are fetched concurrently with a 15s deadline (the tunnel is
+// already up, so there is no ReadyTimeout pressure).
+func FetchAfterProxy(ctx context.Context, sources []model.CIDRURLSource) ([]string, error) {
+	return fetchSources(ctx, sources, model.FetchAfter)
+}
+
+// fetchSources fetches all sources matching the given timing
+// concurrently, bounded by a shared deadline derived from fetchTimeout
+// (for "before") or 15s (for "after").
+func fetchSources(ctx context.Context, sources []model.CIDRURLSource, timing model.FetchTiming) ([]string, error) {
+	// Collect matching sources.
+	var matching []model.CIDRURLSource
+	for _, src := range sources {
+		if src.FetchTiming == timing {
+			matching = append(matching, src)
+		}
+	}
+	if len(matching) == 0 {
+		return nil, nil
+	}
+
+	// Shared deadline for all fetches.
+	deadline := fetchTimeout
+	if timing == model.FetchAfter {
+		deadline = 15 * time.Second
+	}
+	fetchCtx, cancel := context.WithTimeout(ctx, deadline)
+	defer cancel()
+
+	type result struct {
+		cidrs []string
+		err   error
+		url   string
+	}
+	results := make(chan result, len(matching))
+
+	for _, src := range matching {
+		go func(s model.CIDRURLSource) {
+			cidrs, err := fetchOne(fetchCtx, s.URL)
+			results <- result{cidrs: cidrs, err: err, url: s.URL}
+		}(src)
+	}
+
+	var allCIDRs []string
+	var errs []string
+	for range matching {
+		r := <-results
+		if r.err != nil {
+			label := "before-proxy"
+			if timing == model.FetchAfter {
+				label = "after-proxy"
+			}
+			log.L().Error("fetch "+label+" CIDR list failed (continuing)",
+				"url", r.url, "error", r.err)
+			errs = append(errs, fmt.Sprintf("%s: %v", r.url, r.err))
+			continue
+		}
+		label := "before-proxy"
+		if timing == model.FetchAfter {
+			label = "after-proxy"
+		}
+		log.L().Info("fetched "+label+" CIDR list",
+			"url", r.url, "count", len(r.cidrs))
+		allCIDRs = append(allCIDRs, r.cidrs...)
+	}
+
+	if len(allCIDRs) == 0 && len(errs) > 0 {
+		return nil, fmt.Errorf("all CIDR URL fetches failed: %s", strings.Join(errs, "; "))
+	}
+	return allCIDRs, nil
+}
+
+// fetchOne fetches a single URL and parses the response as a CIDR list.
+func fetchOne(ctx context.Context, url string) ([]string, error) {
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
+	if err != nil {
+		return nil, fmt.Errorf("create request: %w", err)
+	}
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("fetch: %w", err)
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("http %d", resp.StatusCode)
+	}
+	body, err := io.ReadAll(io.LimitReader(resp.Body, 1<<20)) // 1 MiB max
+	if err != nil {
+		return nil, fmt.Errorf("read body: %w", err)
+	}
+	return ParseCIDRList(string(body)), nil
+}
+
+// ParseCIDRList parses text into a list of valid CIDR strings. Each
+// line is treated as a separate CIDR entry. Empty lines and lines
+// starting with '#' are skipped. Invalid CIDR entries are silently
+// ignored.
+func ParseCIDRList(text string) []string {
+	var out []string
+	for _, line := range strings.Split(text, "\n") {
+		c := strings.TrimSpace(line)
+		if c == "" || strings.HasPrefix(c, "#") {
+			continue
+		}
+		_, _, err := net.ParseCIDR(c)
+		if err != nil {
+			log.L().Debug("ignoring invalid CIDR entry", "cidr", c)
+			continue
+		}
+		out = append(out, c)
+	}
+	return out
+}
+
+// ClassifyCIDRs splits a list of CIDR strings into IPv4 and IPv6 lists.
+func ClassifyCIDRs(cidrs []string) (v4, v6 []string) {
+	for _, cidr := range cidrs {
+		_, ipNet, err := net.ParseCIDR(cidr)
+		if err != nil {
+			continue
+		}
+		if ipNet.IP.To4() != nil {
+			v4 = append(v4, cidr)
+		} else {
+			v6 = append(v6, cidr)
+		}
+	}
+	return v4, v6
+}

internal/daemon/daemon.go

@@ -19,6 +19,7 @@ import (
 	"net"
 	"os"
 	"os/signal"
+	"sync"
 	"syscall"
 
 	"lmvpn/internal/ipc"
@@ -26,6 +27,7 @@ import (
 	"lmvpn/internal/model"
 	"lmvpn/internal/paths"
 	"lmvpn/internal/stats"
+	"lmvpn/internal/version"
 	"lmvpn/internal/vpn"
 )
 
@@ -59,8 +61,8 @@ func Run(userHome string, uid, gid int) error {
 	// Chown the IPC socket so the non-root GUI process can connect.
 	// This is the critical fix: without it, the socket is owned by
 	// root:wheel with mode 0660, and the user cannot dial it.
-	chownToUser(paths.IPCSocketPath(), uid, gid)
-	log.L().Info("daemon listening", "socket", paths.IPCSocketPath())
+	chownToUser(paths.IPCAddress(), uid, gid)
+	log.L().Info("daemon listening", "socket", paths.IPCAddress())
 
 	d := &daemon{server: server}
 
@@ -91,6 +93,7 @@ func chownToUser(path string, uid, gid int) {
 
 type daemon struct {
 	server  *ipc.Server
+	mu      sync.Mutex
 	session *vpn.SessionManager
 	cancel  context.CancelFunc
 }
@@ -108,23 +111,40 @@ func (d *daemon) handle(conn net.Conn, req ipc.Request) {
 		d.server.Close()
 		os.Exit(0)
 	case ipc.CmdStats:
-		if d.session != nil {
-			snap := d.session.Stats().Snapshot()
+		d.mu.Lock()
+		sess := d.session
+		d.mu.Unlock()
+		if sess != nil {
+			snap := sess.Stats().Snapshot()
 			d.server.Broadcast(ipc.Event{Event: ipc.EvStats, Stats: &snap})
 		}
 		_ = ipc.WriteOK(conn)
+	case ipc.CmdRefreshCIDR:
+		d.mu.Lock()
+		sess := d.session
+		d.mu.Unlock()
+		if sess != nil {
+			go sess.RefreshCIDRs()
+			_ = ipc.WriteOK(conn)
+		} else {
+			_ = ipc.WriteErr(conn, "no active session")
+		}
+	case ipc.CmdVersion:
+		_ = ipc.WriteVersion(conn, version.Version)
 	default:
 		_ = ipc.WriteErr(conn, "unknown command: "+req.Cmd)
 	}
 }
 
 func (d *daemon) startSession(conn net.Conn, req ipc.Request) {
+	d.mu.Lock()
 	if req.Config == nil {
+		d.mu.Unlock()
 		_ = ipc.WriteErr(conn, "missing config")
 		return
 	}
 	if d.session != nil {
-		d.stopSession()
+		d.stopSessionLocked()
 	}
 
 	cfg := vpn.SessionConfig{
@@ -136,30 +156,54 @@ func (d *daemon) startSession(conn net.Conn, req ipc.Request) {
 		Token:         req.Config.Token,
 		AuthMode:      model.AuthMode(req.Config.AuthMode),
 		RoutingMode:   ipc.RoutingModeFromIPC(req.Config.RoutingMode),
-		CustomCIDRs: req.Config.CustomCIDRs,
+		CIDRV4:        req.Config.CIDRV4,
+		CIDRV6:        req.Config.CIDRV6,
+		CIDRV4URLs:    convertIPCSources(req.Config.CIDRV4URLs),
+		CIDRV6URLs:    convertIPCSources(req.Config.CIDRV6URLs),
 		MTUOverride:   req.Config.MTUOverride,
+		TLSCACert:     req.Config.TLSCACert,
+		TLSCAPath:     req.Config.TLSCAPath,
+		TLSInsecure:   req.Config.TLSInsecure,
+		TLSPinnedHash: req.Config.TLSPinnedHash,
 	}
 
 	ctx, cancel := context.WithCancel(context.Background())
 	d.cancel = cancel
 	d.session = vpn.New(
 		func(s stats.State) {
-			d.server.Broadcast(ipc.Event{Event: ipc.EvState, State: string(s)})
+			d.server.Broadcast(ipc.Event{Event: ipc.EvState, State: string(s), ConnectStep: d.session.Stats().ConnectStep()})
 		},
 		func(snap stats.Snapshot) {
 			s := snap
 			d.server.Broadcast(ipc.Event{Event: ipc.EvStats, Stats: &s})
 		},
+		func(code string, msg string) {
+			d.server.Broadcast(ipc.Event{Event: ipc.EvError, Code: code, Message: msg})
+		},
 	)
+	// Release the lock before Connect. Connect is non-blocking (it
+	// starts a goroutine), but holding the lock across it would
+	// serialize all IPC commands (CmdStats, CmdStop, etc.) behind the
+	// session startup.
+	d.mu.Unlock()
 
 	if err := d.session.Connect(ctx, cfg); err != nil {
 		_ = ipc.WriteErr(conn, "connect: "+err.Error())
+		d.mu.Lock()
 		d.session = nil
+		d.cancel = nil
+		d.mu.Unlock()
 		return
 	}
 }
 
 func (d *daemon) stopSession() {
+	d.mu.Lock()
+	defer d.mu.Unlock()
+	d.stopSessionLocked()
+}
+
+func (d *daemon) stopSessionLocked() {
 	if d.cancel != nil {
 		d.cancel()
 		d.cancel = nil
@@ -169,3 +213,18 @@ func (d *daemon) stopSession() {
 		d.session = nil
 	}
 }
+
+// convertIPCSources converts IPC CIDRURLSource values to model.CIDRURLSource.
+func convertIPCSources(srcs []ipc.CIDRURLSource) []model.CIDRURLSource {
+	if len(srcs) == 0 {
+		return nil
+	}
+	out := make([]model.CIDRURLSource, len(srcs))
+	for i, s := range srcs {
+		out[i] = model.CIDRURLSource{
+			URL:         s.URL,
+			FetchTiming: model.FetchTiming(s.FetchTiming),
+		}
+	}
+	return out
+}

internal/daemon/daemon_name_unix.go

@@ -0,0 +1,5 @@
+//go:build !windows
+
+package daemon
+
+const daemonBinaryName = "lmvpnd"

internal/daemon/daemon_name_windows.go

@@ -0,0 +1,5 @@
+//go:build windows
+
+package daemon
+
+const daemonBinaryName = "lmvpnd.exe"

internal/daemon/launch_common.go

@@ -0,0 +1,32 @@
+package daemon
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+// resolveDaemonBinary locates the lmvpnd binary relative to the
+// launcher's executable path. In a .app bundle, lmvpnd lives in the
+// same Contents/MacOS/ directory as lmvpn. In development, it lives
+// in the same build directory.
+func resolveDaemonBinary() (string, error) {
+	exe, err := os.Executable()
+	if err != nil {
+		return "", fmt.Errorf("resolve launcher executable: %w", err)
+	}
+
+	// Resolve any symlinks.
+	exe, err = filepath.EvalSymlinks(exe)
+	if err != nil {
+		return "", fmt.Errorf("resolve symlink: %w", err)
+	}
+
+	dir := filepath.Dir(exe)
+	candidate := filepath.Join(dir, daemonBinaryName)
+	if _, err := os.Stat(candidate); err == nil {
+		return candidate, nil
+	}
+
+	return "", fmt.Errorf("could not find %s near %s", daemonBinaryName, exe)
+}

internal/daemon/launch_unix.go

@@ -1,3 +1,5 @@
+//go:build !windows
+
 package daemon
 
 import (
@@ -120,33 +122,4 @@ func Launch(userHome string, uid, gid int, daemonBin string) error {
 	return nil
 }
 
-// resolveDaemonBinary locates the lmvpnd binary relative to the
-// launcher's executable path. In a .app bundle, lmvpnd lives in the
-// same Contents/MacOS/ directory as lmvpn. In development, it lives
-// in the same build directory.
-func resolveDaemonBinary() (string, error) {
-	exe, err := os.Executable()
-	if err != nil {
-		return "", fmt.Errorf("resolve launcher executable: %w", err)
-	}
-
-	// Resolve any symlinks.
-	exe, err = filepath.EvalSymlinks(exe)
-	if err != nil {
-		return "", fmt.Errorf("resolve symlink: %w", err)
-	}
-
-	dir := filepath.Dir(exe)
-	candidates := []string{
-		filepath.Join(dir, "lmvpnd"),
-		filepath.Join(dir, "lmvpn-daemon"),
-	}
-
-	for _, c := range candidates {
-		if _, err := os.Stat(c); err == nil {
-			return c, nil
-		}
-	}
-
-	return "", fmt.Errorf("could not find lmvpnd binary near %s (tried %v)", exe, candidates)
-}
+// resolveDaemonBinary is in launch_common.go.

internal/daemon/launch_windows.go

@@ -0,0 +1,93 @@
+//go:build windows
+
+package daemon
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"syscall"
+
+	"lmvpn/internal/paths"
+)
+
+// Launch starts the daemon binary (lmvpnd.exe) as a detached process
+// and returns immediately. On Windows, detachment is achieved via
+// CREATE_NEW_PROCESS_GROUP | DETACHED_PROCESS creation flags instead
+// of the Unix Setsid call.
+//
+// The launcher itself is invoked by the GUI via ShellExecute "runas"
+// (UAC elevation). It:
+//  1. Computes the daemon log path using the user's home directory
+//  2. Opens the log file (append) and NUL
+//  3. Starts the lmvpnd.exe binary, redirecting stdio
+//  4. Returns immediately — the child continues running independently
+func Launch(userHome string, uid, gid int, daemonBin string) error {
+	paths.SetUserHome(userHome)
+	if err := paths.EnsureDirs(); err != nil {
+		fmt.Fprintf(os.Stderr, "ensure dirs: %v\n", err)
+	}
+
+	if daemonBin == "" {
+		var err error
+		daemonBin, err = resolveDaemonBinary()
+		if err != nil {
+			return err
+		}
+	}
+
+	absBin, err := filepath.Abs(daemonBin)
+	if err != nil {
+		return fmt.Errorf("resolve absolute path for %s: %w", daemonBin, err)
+	}
+	daemonBin = absBin
+
+	if _, err := os.Stat(daemonBin); err != nil {
+		return fmt.Errorf("daemon binary not found at %s: %w", daemonBin, err)
+	}
+
+	logPath := paths.DaemonLogFile()
+	logFile, err := os.OpenFile(logPath, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0o644)
+	if err != nil {
+		return fmt.Errorf("open daemon log %s: %w", logPath, err)
+	}
+
+	devNull, err := os.Open(os.DevNull)
+	if err != nil {
+		logFile.Close()
+		return fmt.Errorf("open NUL: %w", err)
+	}
+
+	args := []string{
+		"--user-home", userHome,
+		"--uid", fmt.Sprintf("%d", uid),
+		"--gid", fmt.Sprintf("%d", gid),
+	}
+
+	fmt.Fprintf(logFile, "=== launcher: starting daemon %s %v ===\n", daemonBin, args)
+
+	// CREATE_NEW_PROCESS_GROUP (0x200) | DETACHED_PROCESS (0x8)
+	procAttr := &os.ProcAttr{
+		Dir: os.TempDir(),
+		Env: append(os.Environ(),
+			"LMVPN_DAEMON=1",
+		),
+		Files: []*os.File{devNull, logFile, logFile},
+		Sys: &syscall.SysProcAttr{
+			CreationFlags: 0x00000200 | 0x00000008,
+		},
+	}
+
+	pid, err := os.StartProcess(daemonBin, append([]string{daemonBin}, args...), procAttr)
+	logFile.Close()
+	devNull.Close()
+
+	if err != nil {
+		return fmt.Errorf("start daemon process: %w", err)
+	}
+
+	_ = pid.Release()
+
+	fmt.Fprintf(os.Stderr, "daemon launched (pid %d, bin %s)\n", pid.Pid, daemonBin)
+	return nil
+}

internal/db/db.go

@@ -8,6 +8,7 @@ package db
 import (
 	"database/sql"
 	"fmt"
+	"net"
 	"strings"
 
 	"lmvpn/internal/paths"
@@ -45,7 +46,16 @@ func (s *Store) migrate() error {
 	if err != nil {
 		return err
 	}
-	return s.migrateV2()
+	if err := s.migrateV2(); err != nil {
+		return err
+	}
+	if err := s.migrateV3(); err != nil {
+		return err
+	}
+	if err := s.migrateV4(); err != nil {
+		return err
+	}
+	return s.migrateV5()
 }
 
 func (s *Store) migrateV2() error {
@@ -165,6 +175,166 @@ func nullStr(s sql.NullString) sql.NullString {
 	return s
 }
 
+// migrateV3 adds the assigned_ip6 column to connection_logs for IPv6
+// dual-stack support. Idempotent: skips if the column already exists.
+func (s *Store) migrateV3() error {
+	if columnExists(s.db, "connection_logs", "assigned_ip6") {
+		return nil
+	}
+	_, err := s.db.Exec(`ALTER TABLE connection_logs ADD COLUMN assigned_ip6 TEXT NOT NULL DEFAULT ''`)
+	if err != nil {
+		return fmt.Errorf("migrate v3 add assigned_ip6: %w", err)
+	}
+	return nil
+}
+
+// migrateV4 adds TLS certificate verification columns to
+// server_profiles for custom CA, insecure mode, and cert pinning.
+// Idempotent: skips columns that already exist.
+func (s *Store) migrateV4() error {
+	cols := []struct {
+		name string
+		sql  string
+	}{
+		{"tls_ca_cert", "ALTER TABLE server_profiles ADD COLUMN tls_ca_cert TEXT NOT NULL DEFAULT ''"},
+		{"tls_ca_path", "ALTER TABLE server_profiles ADD COLUMN tls_ca_path TEXT NOT NULL DEFAULT ''"},
+		{"tls_insecure", "ALTER TABLE server_profiles ADD COLUMN tls_insecure INTEGER NOT NULL DEFAULT 0"},
+		{"tls_pinned_hash", "ALTER TABLE server_profiles ADD COLUMN tls_pinned_hash TEXT NOT NULL DEFAULT ''"},
+	}
+	for _, c := range cols {
+		if !columnExists(s.db, "server_profiles", c.name) {
+			if _, err := s.db.Exec(c.sql); err != nil {
+				return fmt.Errorf("migrate v4 add %s: %w", c.name, err)
+			}
+		}
+	}
+	return nil
+}
+
+// migrateV5 replaces the single custom_cidrs column with separate
+// cidr_v4, cidr_v6, cidr_v4_urls, cidr_v6_urls columns. It migrates
+// existing routing modes: 'custom' -> 'proxy', 'split' -> 'full'.
+// Existing custom_cidrs are split into v4/v6 based on address family.
+// Idempotent: skips columns that already exist.
+func (s *Store) migrateV5() error {
+	cols := []struct {
+		name string
+		sql  string
+	}{
+		{"cidr_v4", "ALTER TABLE server_profiles ADD COLUMN cidr_v4 TEXT NOT NULL DEFAULT ''"},
+		{"cidr_v6", "ALTER TABLE server_profiles ADD COLUMN cidr_v6 TEXT NOT NULL DEFAULT ''"},
+		{"cidr_v4_urls", "ALTER TABLE server_profiles ADD COLUMN cidr_v4_urls TEXT NOT NULL DEFAULT ''"},
+		{"cidr_v6_urls", "ALTER TABLE server_profiles ADD COLUMN cidr_v6_urls TEXT NOT NULL DEFAULT ''"},
+	}
+	needMigration := false
+	for _, c := range cols {
+		if !columnExists(s.db, "server_profiles", c.name) {
+			needMigration = true
+			break
+		}
+	}
+	if !needMigration {
+		return nil
+	}
+
+	for _, c := range cols {
+		if !columnExists(s.db, "server_profiles", c.name) {
+			if _, err := s.db.Exec(c.sql); err != nil {
+				return fmt.Errorf("migrate v5 add %s: %w", c.name, err)
+			}
+		}
+	}
+
+	// Migrate existing custom_cidrs into cidr_v4 / cidr_v6 and update
+	// routing mode codes. Only process rows that still have a non-empty
+	// custom_cidrs or an old routing mode.
+	rows, err := s.db.Query(`SELECT id, routing_mode, custom_cidrs FROM server_profiles`)
+	if err != nil {
+		return fmt.Errorf("migrate v5 read rows: %w", err)
+	}
+	type row struct {
+		id          int64
+		routingMode string
+		customCIDRs string
+	}
+	var toUpdate []row
+	for rows.Next() {
+		var r row
+		if err := rows.Scan(&r.id, &r.routingMode, &r.customCIDRs); err != nil {
+			rows.Close()
+			return fmt.Errorf("migrate v5 scan: %w", err)
+		}
+		toUpdate = append(toUpdate, r)
+	}
+	rows.Close()
+
+	for _, r := range toUpdate {
+		newMode := r.routingMode
+		switch newMode {
+		case "custom":
+			newMode = "proxy"
+		case "split":
+			newMode = "full"
+		}
+
+		v4CIDRs, v6CIDRs := splitCIDRsByFamily(r.customCIDRs)
+
+		_, err := s.db.Exec(
+			`UPDATE server_profiles SET routing_mode = ?, cidr_v4 = ?, cidr_v6 = ? WHERE id = ?`,
+			newMode, v4CIDRs, v6CIDRs, r.id)
+		if err != nil {
+			return fmt.Errorf("migrate v5 update row %d: %w", r.id, err)
+		}
+	}
+
+	return nil
+}
+
+// splitCIDRsByFamily splits a comma-separated CIDR string into IPv4 and
+// IPv6 parts. Used for migration from the old custom_cidrs column.
+func splitCIDRsByFamily(customCIDRs string) (v4, v6 string) {
+	if customCIDRs == "" {
+		return "", ""
+	}
+	var v4Parts, v6Parts []string
+	for _, part := range strings.Split(customCIDRs, ",") {
+		c := strings.TrimSpace(part)
+		if c == "" {
+			continue
+		}
+		if _, ipNet, err := net.ParseCIDR(c); err == nil {
+			if ipNet.IP.To4() != nil {
+				v4Parts = append(v4Parts, c)
+			} else {
+				v6Parts = append(v6Parts, c)
+			}
+		}
+	}
+	return strings.Join(v4Parts, ", "), strings.Join(v6Parts, ", ")
+}
+
+// columnExists reports whether a column exists on a table.
+func columnExists(db *sql.DB, table, column string) bool {
+	rows, err := db.Query(fmt.Sprintf("PRAGMA table_info(%s)", table))
+	if err != nil {
+		return false
+	}
+	defer rows.Close()
+	for rows.Next() {
+		var cid int
+		var name, ctype string
+		var notnull, pk int
+		var dflt sql.NullString
+		if err := rows.Scan(&cid, &name, &ctype, &notnull, &dflt, &pk); err != nil {
+			return false
+		}
+		if name == column {
+			return true
+		}
+	}
+	return false
+}
+
 const schemaV2 = `
 CREATE TABLE IF NOT EXISTS server_profiles (
 	id              INTEGER PRIMARY KEY AUTOINCREMENT,
@@ -178,6 +348,10 @@ CREATE TABLE IF NOT EXISTS server_profiles (
 	auth_mode       TEXT    NOT NULL DEFAULT 'both',
 	routing_mode    TEXT    NOT NULL DEFAULT 'full',
 	custom_cidrs    TEXT    NOT NULL DEFAULT '',
+	cidr_v4         TEXT    NOT NULL DEFAULT '',
+	cidr_v6         TEXT    NOT NULL DEFAULT '',
+	cidr_v4_urls    TEXT    NOT NULL DEFAULT '',
+	cidr_v6_urls    TEXT    NOT NULL DEFAULT '',
 	mtu_override    INTEGER NOT NULL DEFAULT 0,
 	auto_connect    INTEGER NOT NULL DEFAULT 0,
 	created_at      DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
@@ -190,6 +364,7 @@ CREATE TABLE IF NOT EXISTS connection_logs (
 	started_at   DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
 	ended_at     DATETIME,
 	assigned_ip  TEXT    NOT NULL DEFAULT '',
+	assigned_ip6 TEXT    NOT NULL DEFAULT '',
 	rx_bytes     INTEGER NOT NULL DEFAULT 0,
 	tx_bytes     INTEGER NOT NULL DEFAULT 0,
 	status       TEXT    NOT NULL DEFAULT 'connected',

internal/db/log.go

@@ -21,13 +21,13 @@ func (s *Store) StartLog(profileID int64) (int64, error) {
 }
 
 // FinishLog finalises a connection log entry with final stats.
-func (s *Store) FinishLog(id int64, status model.ConnectionStatus, assignedIP string, rxBytes, txBytes int64, errMsg string) error {
+func (s *Store) FinishLog(id int64, status model.ConnectionStatus, assignedIP, assignedIP6 string, rxBytes, txBytes int64, errMsg string) error {
 	_, err := s.db.Exec(
 		`UPDATE connection_logs SET
-		    ended_at = ?, assigned_ip = ?, rx_bytes = ?, tx_bytes = ?,
+		    ended_at = ?, assigned_ip = ?, assigned_ip6 = ?, rx_bytes = ?, tx_bytes = ?,
 		    status = ?, error_msg = ?
 		 WHERE id = ?`,
-		time.Now(), assignedIP, rxBytes, txBytes, status, errMsg, id)
+		time.Now(), assignedIP, assignedIP6, rxBytes, txBytes, status, errMsg, id)
 	if err != nil {
 		return fmt.Errorf("finish log %d: %w", id, err)
 	}
@@ -37,7 +37,7 @@ func (s *Store) FinishLog(id int64, status model.ConnectionStatus, assignedIP st
 // RecentLogs returns the most recent N connection logs for a profile.
 func (s *Store) RecentLogs(profileID int64, limit int) ([]model.ConnectionLog, error) {
 	rows, err := s.db.Query(
-		`SELECT id, profile_id, started_at, ended_at, assigned_ip,
+		`SELECT id, profile_id, started_at, ended_at, assigned_ip, assigned_ip6,
 		        rx_bytes, tx_bytes, status, error_msg
 		 FROM connection_logs WHERE profile_id = ?
 		 ORDER BY started_at DESC LIMIT ?`,
@@ -52,7 +52,7 @@ func (s *Store) RecentLogs(profileID int64, limit int) ([]model.ConnectionLog, e
 		var l model.ConnectionLog
 		var ended interface{}
 		if err := rows.Scan(&l.ID, &l.ProfileID, &l.StartedAt, &ended,
-			&l.AssignedIP, &l.RxBytes, &l.TxBytes, &l.Status, &l.ErrorMsg); err != nil {
+			&l.AssignedIP, &l.AssignedIP6, &l.RxBytes, &l.TxBytes, &l.Status, &l.ErrorMsg); err != nil {
 			return nil, err
 		}
 		if t, ok := ended.(time.Time); ok {

internal/db/profile.go

@@ -14,11 +14,15 @@ func (s *Store) CreateProfile(p *model.ServerProfile) (int64, error) {
 		`INSERT INTO server_profiles
 		   (name, protocol, host, server_ips, port, path,
 		    username, auth_mode, routing_mode,
-		    custom_cidrs, mtu_override, auto_connect)
-		 VALUES (?,?,?,?,?,?,?,?,?,?,?,?)`,
+		    cidr_v4, cidr_v6, cidr_v4_urls, cidr_v6_urls,
+		    mtu_override, auto_connect,
+		    tls_ca_cert, tls_ca_path, tls_insecure, tls_pinned_hash)
+		 VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)`,
 		p.Name, p.Protocol, p.Host, p.ServerIPs, p.Port, p.Path,
 		p.Username, p.AuthMode, p.RoutingMode,
-		p.CustomCIDRs, p.MTUOverride, p.AutoConnect,
+		p.CIDRV4, p.CIDRV6, p.CIDRV4URLs, p.CIDRV6URLs,
+		p.MTUOverride, p.AutoConnect,
+		p.TLSCACert, p.TLSCAPath, p.TLSInsecure, p.TLSPinnedHash,
 	)
 	if err != nil {
 		return 0, fmt.Errorf("insert profile: %w", err)
@@ -36,11 +40,17 @@ func (s *Store) GetProfile(id int64) (*model.ServerProfile, error) {
 	err := s.db.QueryRow(
 		`SELECT id, name, protocol, host, server_ips, port, path,
 		        username, auth_mode, routing_mode,
-		        custom_cidrs, mtu_override, auto_connect, created_at, last_connected_at
+		        cidr_v4, cidr_v6, cidr_v4_urls, cidr_v6_urls,
+		        mtu_override, auto_connect,
+		        tls_ca_cert, tls_ca_path, tls_insecure, tls_pinned_hash,
+		        created_at, last_connected_at
 		 FROM server_profiles WHERE id = ?`, id,
 	).Scan(&p.ID, &p.Name, &p.Protocol, &p.Host, &p.ServerIPs, &p.Port, &p.Path,
-		&p.Username, &p.AuthMode, &p.RoutingMode, &p.CustomCIDRs, &p.MTUOverride,
-		&p.AutoConnect, &p.CreatedAt, &last)
+		&p.Username, &p.AuthMode, &p.RoutingMode,
+		&p.CIDRV4, &p.CIDRV6, &p.CIDRV4URLs, &p.CIDRV6URLs,
+		&p.MTUOverride, &p.AutoConnect,
+		&p.TLSCACert, &p.TLSCAPath, &p.TLSInsecure, &p.TLSPinnedHash,
+		&p.CreatedAt, &last)
 	if err != nil {
 		return nil, fmt.Errorf("get profile %d: %w", id, err)
 	}
@@ -55,7 +65,10 @@ func (s *Store) ListProfiles() ([]model.ServerProfile, error) {
 	rows, err := s.db.Query(
 		`SELECT id, name, protocol, host, server_ips, port, path,
 		        username, auth_mode, routing_mode,
-		        custom_cidrs, mtu_override, auto_connect, created_at, last_connected_at
+		        cidr_v4, cidr_v6, cidr_v4_urls, cidr_v6_urls,
+		        mtu_override, auto_connect,
+		        tls_ca_cert, tls_ca_path, tls_insecure, tls_pinned_hash,
+		        created_at, last_connected_at
 		 FROM server_profiles ORDER BY name`)
 	if err != nil {
 		return nil, fmt.Errorf("list profiles: %w", err)
@@ -68,7 +81,10 @@ func (s *Store) ListProfiles() ([]model.ServerProfile, error) {
 		var last sql.NullTime
 		if err := rows.Scan(&p.ID, &p.Name, &p.Protocol, &p.Host, &p.ServerIPs,
 			&p.Port, &p.Path, &p.Username, &p.AuthMode, &p.RoutingMode,
-			&p.CustomCIDRs, &p.MTUOverride, &p.AutoConnect, &p.CreatedAt, &last); err != nil {
+			&p.CIDRV4, &p.CIDRV6, &p.CIDRV4URLs, &p.CIDRV6URLs,
+			&p.MTUOverride, &p.AutoConnect,
+			&p.TLSCACert, &p.TLSCAPath, &p.TLSInsecure, &p.TLSPinnedHash,
+			&p.CreatedAt, &last); err != nil {
 			return nil, err
 		}
 		if last.Valid {
@@ -85,11 +101,15 @@ func (s *Store) UpdateProfile(p *model.ServerProfile) error {
 		`UPDATE server_profiles SET
 		    name = ?, protocol = ?, host = ?, server_ips = ?, port = ?, path = ?,
 		    username = ?, auth_mode = ?, routing_mode = ?,
-		    custom_cidrs = ?, mtu_override = ?, auto_connect = ?
+		    cidr_v4 = ?, cidr_v6 = ?, cidr_v4_urls = ?, cidr_v6_urls = ?,
+		    mtu_override = ?, auto_connect = ?,
+		    tls_ca_cert = ?, tls_ca_path = ?, tls_insecure = ?, tls_pinned_hash = ?
 		 WHERE id = ?`,
 		p.Name, p.Protocol, p.Host, p.ServerIPs, p.Port, p.Path,
 		p.Username, p.AuthMode, p.RoutingMode,
-		p.CustomCIDRs, p.MTUOverride, p.AutoConnect, p.ID)
+		p.CIDRV4, p.CIDRV6, p.CIDRV4URLs, p.CIDRV6URLs,
+		p.MTUOverride, p.AutoConnect,
+		p.TLSCACert, p.TLSCAPath, p.TLSInsecure, p.TLSPinnedHash, p.ID)
 	if err != nil {
 		return fmt.Errorf("update profile %d: %w", p.ID, err)
 	}

internal/i18n/en.toml

@@ -19,13 +19,37 @@ BtnCancel = "Cancel"
 BtnOK = "OK"
 
 IpLabel = "IP: {{.ip}}"
+Ip6Label = "IPv6: {{.ip}}"
+Ip6None = "IPv6: —"
 IpNone = "IP: —"
 UptimeLabel = "Uptime: {{.uptime}}"
 UptimeNone = "Uptime: —"
-RxLabel = "↓ {{.bytes}}"
-TxLabel = "↑ {{.bytes}}"
-RxZero = "↓ 0 B"
-TxZero = "↑ 0 B"
+RxV4Label = "IPv4 ↓ {{.bytes}} {{.speed}}"
+TxV4Label = "↑ {{.bytes}} {{.speed}}"
+RxV6Label = "IPv6 ↓ {{.bytes}} {{.speed}}"
+TxV6Label = "↑ {{.bytes}} {{.speed}}"
+RxTotalLabel = "Total ↓ {{.bytes}} {{.speed}}"
+TxTotalLabel = "↑ {{.bytes}} {{.speed}}"
+RxV4Zero = "IPv4 ↓ 0 B  0 bps"
+TxV4Zero = "↑ 0 B  0 bps"
+RxV6Zero = "IPv6 ↓ 0 B  0 bps"
+TxV6Zero = "↑ 0 B  0 bps"
+RxTotalZero = "Total ↓ 0 B  0 bps"
+TxTotalZero = "↑ 0 B  0 bps"
+
+StatusRoutingMode = "Routing Mode: {{.mode}}"
+CIDRHit = "hit"
+CIDRConfigured = "configured"
+CIDRUnmatched = "unmatched"
+CIDRDestinations = "destinations"
+RouteLoading = "loading routes"
+CIDRLoading = "loading"
+StepFetchCIDRs = "fetching CIDR lists"
+StepConnecting = "connecting"
+StepLoadRoutes = "loading routes"
+
+BtnRefreshCIDR = "Refresh CIDR"
+CIDRFetchError = "fetch failed"
 
 DlgNoProfileTitle = "No Profile"
 DlgNoProfileEditMsg = "Select a profile to edit."
@@ -35,6 +59,7 @@ DlgDeleteProfileMsg = 'Delete profile "{{.name}}" and its stored credentials?'
 DlgProfileTitle = "Profile"
 DlgValidationTitle = "Validation"
 DlgValidationMsg = "Name, Host, and Username are required."
+DlgInvalidIPMsg = "Invalid IP address(es): {{.ips}}"
 DlgDaemonError = "Daemon Error"
 DlgCredentialError = "Credential Error"
 DlgCredentialErrorMsg = "No password stored for this profile. Edit the profile to set it."
@@ -43,11 +68,23 @@ DlgVPNError = "VPN Error"
 DlgSaveError = "Save Error"
 DlgKeychainError = "Keychain Error"
 DlgError = "Error"
+DlgAuthError = "Authentication Failed"
+AuthErrWrongCredentials = "Wrong username or password. Please check your credentials."
+AuthErrUserDisabled = "This user account does not exist or has been disabled."
+AuthErrTokenInvalid = "The authentication token is invalid or expired."
+AuthErrRateLimited = "Too many authentication attempts. Please try again later."
+AuthErrMalformed = "Authentication message format error."
 
 BtnResetDB = "Reset Database"
 DlgResetDBTitle = "Reset Database"
 DlgResetDBMsg = "Delete all profiles and connection logs? This cannot be undone."
 
+BtnProfileList = "Profile List"
+ProfileListTitle = "Profile List"
+DlgNoListSelectTitle = "No Selection"
+DlgNoListSelectEditMsg = "Select a profile in the list to edit."
+DlgNoListSelectDeleteMsg = "Select a profile in the list to delete."
+
 TrayShowWindow = "Show Window"
 TrayConnect = "Connect"
 TrayDisconnect = "Disconnect"
@@ -65,18 +102,42 @@ FieldUsername = "Username"
 FieldPassword = "Password"
 FieldAuthMode = "Auth Mode"
 FieldRoutingMode = "Routing Mode"
-FieldCustomCIDRs = "Custom CIDRs (comma-separated)"
+FieldCIDRV4 = "IPv4 CIDRs (comma-separated)"
+FieldCIDRV6 = "IPv6 CIDRs (comma-separated)"
+FieldCIDRV4URLs = "IPv4 CIDR URL Sources"
+FieldCIDRV6URLs = "IPv6 CIDR URL Sources"
 FieldMTUOverride = "MTU Override"
 
-PlaceholderCIDRs = "10.0.0.0/8, 172.16.0.0/12"
+PlaceholderCIDRV4 = "10.0.0.0/8, 172.16.0.0/12"
+PlaceholderCIDRV6 = "fd00::/8, 2001:db8::/32"
+PlaceholderCIDRURL = "https://example.com/cidrs.txt"
 PlaceholderMTU = "0 = use server MTU"
 PlaceholderPasswordUnchanged = "(unchanged)"
-PlaceholderServerIPs = "e.g. 1.2.3.4, 5.6.7.8"
+PlaceholderServerIPs = "IPv4/IPv6 supported, e.g. 1.2.3.4, 5.6.7.8"
 
 AuthModeBoth = "Both (JWT + Password)"
 AuthModeJWT = "JWT"
 AuthModePassword = "Password"
 
 RoutingModeFull = "Full Tunnel"
-RoutingModeSplit = "Split Tunnel"
-RoutingModeCustom = "Custom"
+RoutingModeProxy = "Proxy CIDR"
+RoutingModeBypass = "Bypass CIDR"
+
+FetchTimingBefore = "Before Proxy"
+FetchTimingAfter = "After Proxy"
+
+BtnAddURL = "Add URL"
+BtnRemoveURL = "Remove"
+
+FieldTLS = "TLS Certificate"
+FieldTLSCACert = "CA Certificate (PEM)"
+FieldTLSCAPath = "CA Certificate Path"
+HintTLSCAReplacesSystem = "Setting a custom CA replaces system root certificates. Public CA servers (e.g. Let's Encrypt) will fail verification."
+FieldTLSInsecure = "Skip Verification (Insecure)"
+FieldTLSPinnedHash = "Certificate Pin (SHA-256)"
+PlaceholderTLSCACert = "-----BEGIN CERTIFICATE-----..."
+PlaceholderTLSCAPath = "/path/to/ca.crt"
+PlaceholderTLSPinnedHash = "sha256:a1b2c3..."
+BtnBrowse = "Browse..."
+DlgTLSError = "TLS Certificate Error"
+TLSErrorVerification = "Server certificate verification failed."

internal/i18n/zh-Hans.toml

@@ -19,13 +19,37 @@ BtnCancel = "取消"
 BtnOK = "确定"
 
 IpLabel = "IP: {{.ip}}"
+Ip6Label = "IPv6: {{.ip}}"
+Ip6None = "IPv6: —"
 IpNone = "IP: —"
 UptimeLabel = "运行时长: {{.uptime}}"
 UptimeNone = "运行时长: —"
-RxLabel = "↓ {{.bytes}}"
-TxLabel = "↑ {{.bytes}}"
-RxZero = "↓ 0 B"
-TxZero = "↑ 0 B"
+RxV4Label = "IPv4 ↓ {{.bytes}} {{.speed}}"
+TxV4Label = "↑ {{.bytes}} {{.speed}}"
+RxV6Label = "IPv6 ↓ {{.bytes}} {{.speed}}"
+TxV6Label = "↑ {{.bytes}} {{.speed}}"
+RxTotalLabel = "合计 ↓ {{.bytes}} {{.speed}}"
+TxTotalLabel = "↑ {{.bytes}} {{.speed}}"
+RxV4Zero = "IPv4 ↓ 0 B  0 bps"
+TxV4Zero = "↑ 0 B  0 bps"
+RxV6Zero = "IPv6 ↓ 0 B  0 bps"
+TxV6Zero = "↑ 0 B  0 bps"
+RxTotalZero = "合计 ↓ 0 B  0 bps"
+TxTotalZero = "↑ 0 B  0 bps"
+
+StatusRoutingMode = "路由模式: {{.mode}}"
+CIDRHit = "命中"
+CIDRConfigured = "已配置"
+CIDRUnmatched = "未命中"
+CIDRDestinations = "目的地址"
+RouteLoading = "加载路由中"
+CIDRLoading = "加载中"
+StepFetchCIDRs = "获取CIDR列表"
+StepConnecting = "建立连接"
+StepLoadRoutes = "加载路由"
+
+BtnRefreshCIDR = "刷新 CIDR"
+CIDRFetchError = "获取失败"
 
 DlgNoProfileTitle = "无配置"
 DlgNoProfileEditMsg = "请选择要编辑的配置。"
@@ -35,6 +59,7 @@ DlgDeleteProfileMsg = '删除配置"{{.name}}"及其存储的凭据？'
 DlgProfileTitle = "配置"
 DlgValidationTitle = "验证"
 DlgValidationMsg = "名称、主机名和用户名为必填项。"
+DlgInvalidIPMsg = "以下 IP 地址格式无效：{{.ips}}"
 DlgDaemonError = "守护进程错误"
 DlgCredentialError = "凭据错误"
 DlgCredentialErrorMsg = "此配置未存储密码。请编辑配置以设置密码。"
@@ -43,11 +68,23 @@ DlgVPNError = "VPN 错误"
 DlgSaveError = "保存错误"
 DlgKeychainError = "钥匙串错误"
 DlgError = "错误"
+DlgAuthError = "认证失败"
+AuthErrWrongCredentials = "用户名或密码错误，请检查凭据。"
+AuthErrUserDisabled = "用户不存在或已被禁用。"
+AuthErrTokenInvalid = "认证令牌无效或已过期。"
+AuthErrRateLimited = "认证尝试过于频繁，请稍后再试。"
+AuthErrMalformed = "认证消息格式错误。"
 
 BtnResetDB = "重置数据库"
 DlgResetDBTitle = "重置数据库"
 DlgResetDBMsg = "删除所有配置和连接记录？此操作无法撤销。"
 
+BtnProfileList = "配置列表"
+ProfileListTitle = "配置列表"
+DlgNoListSelectTitle = "无选择"
+DlgNoListSelectEditMsg = "请在列表中选择一个配置。"
+DlgNoListSelectDeleteMsg = "请在列表中选择一个配置。"
+
 TrayShowWindow = "显示窗口"
 TrayConnect = "连接"
 TrayDisconnect = "断开连接"
@@ -65,18 +102,42 @@ FieldUsername = "用户名"
 FieldPassword = "密码"
 FieldAuthMode = "认证方式"
 FieldRoutingMode = "路由模式"
-FieldCustomCIDRs = "自定义 CIDR（逗号分隔）"
+FieldCIDRV4 = "IPv4 CIDR（逗号分隔）"
+FieldCIDRV6 = "IPv6 CIDR（逗号分隔）"
+FieldCIDRV4URLs = "IPv4 CIDR URL 来源"
+FieldCIDRV6URLs = "IPv6 CIDR URL 来源"
 FieldMTUOverride = "MTU 覆盖"
 
-PlaceholderCIDRs = "10.0.0.0/8, 172.16.0.0/12"
+PlaceholderCIDRV4 = "10.0.0.0/8, 172.16.0.0/12"
+PlaceholderCIDRV6 = "fd00::/8, 2001:db8::/32"
+PlaceholderCIDRURL = "https://example.com/cidrs.txt"
 PlaceholderMTU = "0 = 使用服务器 MTU"
 PlaceholderPasswordUnchanged = "（未更改）"
-PlaceholderServerIPs = "例: 1.2.3.4, 5.6.7.8"
+PlaceholderServerIPs = "支持 IPv4/IPv6，例: 1.2.3.4, 5.6.7.8"
 
 AuthModeBoth = "全部（JWT + 密码）"
 AuthModeJWT = "JWT"
 AuthModePassword = "密码"
 
 RoutingModeFull = "全隧道"
-RoutingModeSplit = "分离隧道"
-RoutingModeCustom = "自定义"
+RoutingModeProxy = "代理 CIDR"
+RoutingModeBypass = "绕过 CIDR"
+
+FetchTimingBefore = "代理前获取"
+FetchTimingAfter = "代理后获取"
+
+BtnAddURL = "添加 URL"
+BtnRemoveURL = "删除"
+
+FieldTLS = "TLS 证书"
+FieldTLSCACert = "CA 证书 (PEM)"
+FieldTLSCAPath = "CA 证书路径"
+HintTLSCAReplacesSystem = "设置自定义 CA 将替换系统根证书，使用公共 CA（如 Let's Encrypt）的服务器将验证失败。"
+FieldTLSInsecure = "跳过验证 (不安全)"
+FieldTLSPinnedHash = "证书固定 (SHA-256)"
+PlaceholderTLSCACert = "-----BEGIN CERTIFICATE-----..."
+PlaceholderTLSCAPath = "/path/to/ca.crt"
+PlaceholderTLSPinnedHash = "sha256:a1b2c3..."
+BtnBrowse = "浏览..."
+DlgTLSError = "TLS 证书错误"
+TLSErrorVerification = "服务器证书验证失败。"

internal/instance/instance.go

@@ -0,0 +1,81 @@
+// Package instance implements single-instance enforcement for the GUI
+// process. The first instance to start acquires the lock by listening
+// on a dedicated endpoint; subsequent instances dial the endpoint
+// (signalling "bring to front") and exit immediately.
+//
+// The lock is self-cleaning: a crashed process releases the listener
+// automatically (the kernel closes the socket). On unix a stale socket
+// file may remain; Acquire probes it with a dial before removing.
+package instance
+
+import (
+	"errors"
+	"fmt"
+	"net"
+	"os"
+
+	"lmvpn/internal/paths"
+)
+
+// ErrAlreadyRunning is returned by Acquire when another GUI instance
+// is already running. The caller should exit silently.
+var ErrAlreadyRunning = errors.New("another instance is already running")
+
+// Acquire attempts to become the sole GUI instance. On success it
+// returns a channel that receives a value every time another instance
+// signals (the caller should bring its window to the front). The
+// listener is closed when the channel is closed, which happens never
+// during normal operation - the process simply exits and the OS
+// releases the socket.
+//
+// On failure it returns ErrAlreadyRunning (the caller should exit) or
+// another error (the caller may continue without single-instance
+// protection, logging the issue).
+func Acquire() (<-chan struct{}, error) {
+	netType := paths.GUILockNetwork()
+	addr := paths.GUILockAddress()
+
+	l, err := net.Listen(netType, addr)
+	if err == nil {
+		ch := make(chan struct{}, 1)
+		go acceptLoop(l, ch)
+		return ch, nil
+	}
+
+	// Listen failed - check whether another instance is alive.
+	if c, derr := net.Dial(netType, addr); derr == nil {
+		c.Close()
+		return nil, ErrAlreadyRunning
+	}
+
+	// Nobody is listening. On unix this is likely a stale socket file
+	// left by a crashed process; remove it and retry once.
+	if netType == "unix" {
+		_ = os.Remove(addr)
+		l, err = net.Listen(netType, addr)
+		if err == nil {
+			ch := make(chan struct{}, 1)
+			go acceptLoop(l, ch)
+			return ch, nil
+		}
+	}
+
+	return nil, fmt.Errorf("acquire instance lock: %w", err)
+}
+
+// acceptLoop accepts connections from second instances. Each connection
+// is a "focus" signal; the handler closes it immediately and notifies
+// the caller via ch.
+func acceptLoop(l net.Listener, ch chan<- struct{}) {
+	for {
+		conn, err := l.Accept()
+		if err != nil {
+			return
+		}
+		conn.Close()
+		select {
+		case ch <- struct{}{}:
+		default:
+		}
+	}
+}

internal/ipc/ipc.go

@@ -29,6 +29,8 @@ const (
 	CmdStop        = "stop"
 	CmdShutdown    = "shutdown"
 	CmdStats       = "stats"
+	CmdVersion     = "version"       // query daemon build version
+	CmdRefreshCIDR = "refresh_cidr"  // re-fetch CIDR URL sources and update routes
 )
 
 // Event types sent from daemon to GUI.
@@ -55,16 +57,33 @@ type ClientConfig struct {
 	Password      string          `json:"password"`
 	Token         string          `json:"token"`
 	AuthMode      string          `json:"auth_mode"`
-	RoutingMode string   `json:"routing_mode"`
-	CustomCIDRs []string `json:"custom_cidrs"`
+	RoutingMode   string          `json:"routing_mode"`    // "full", "proxy", "bypass"
+	CIDRV4        []string        `json:"cidr_v4"`         // static IPv4 CIDRs
+	CIDRV6        []string        `json:"cidr_v6"`         // static IPv6 CIDRs
+	CIDRV4URLs    []CIDRURLSource `json:"cidr_v4_urls"`   // IPv4 CIDR URL sources
+	CIDRV6URLs    []CIDRURLSource `json:"cidr_v6_urls"`   // IPv6 CIDR URL sources
 	MTUOverride   int             `json:"mtu_override"`
+	TLSCACert     string          `json:"tls_ca_cert"`     // inline CA cert PEM (wss only)
+	TLSCAPath     string          `json:"tls_ca_path"`     // CA cert file path (wss only)
+	TLSInsecure   bool            `json:"tls_insecure"`    // skip cert verification (wss only)
+	TLSPinnedHash string          `json:"tls_pinned_hash"` // SHA-256 cert pin (wss only)
+}
+
+// CIDRURLSource describes a URL that provides a CIDR list. It mirrors
+// model.CIDRURLSource but is kept here to avoid importing the model
+// package into the IPC wire format.
+type CIDRURLSource struct {
+	URL         string `json:"url"`
+	FetchTiming string `json:"fetch_timing"` // "before" or "after"
 }
 
 // Event is a notification from the daemon to the GUI.
 type Event struct {
 	Event       string          `json:"event"`
 	State       string          `json:"state,omitempty"`
+	ConnectStep string          `json:"connect_step,omitempty"` // current connection step (for EvState)
 	Stats       *stats.Snapshot `json:"stats,omitempty"`
+	Code        string          `json:"code,omitempty"`          // stable auth-error code for EvError
 	Message     string          `json:"message,omitempty"`
 }
 
@@ -98,15 +117,34 @@ type Server struct {
 }
 
 // NewServer creates (but does not start) the IPC server. It removes
-// any stale socket file first.
+// any stale socket file first (unix only).
 func NewServer() (*Server, error) {
-	_ = os.Remove(paths.IPCSocketPath())
-	l, err := net.Listen("unix", paths.IPCSocketPath())
+	netType := paths.IPCNetwork()
+	addr := paths.IPCAddress()
+
+	// Guard against a second daemon instance on unix: probe the
+	// socket before removing it. If the dial succeeds, another
+	// daemon is alive and owns the socket - refuse to start so we
+	// don't silently orphan it. Only remove the file when the dial
+	// fails (stale socket from a crashed process).
+	if netType == "unix" {
+		if c, derr := net.Dial(netType, addr); derr == nil {
+			c.Close()
+			return nil, fmt.Errorf("daemon already running on %s", addr)
+		}
+		_ = os.Remove(addr)
+	}
+
+	l, err := net.Listen(netType, addr)
 	if err != nil {
 		return nil, fmt.Errorf("listen ipc: %w", err)
 	}
-	// Mode 0660 so group members (admin) can connect.
-	_ = os.Chmod(paths.IPCSocketPath(), 0o660)
+
+	// Set socket permissions so group members can connect (unix only).
+	if netType == "unix" {
+		_ = os.Chmod(addr, 0o660)
+	}
+
 	return &Server{listener: l, clients: make(map[net.Conn]bool)}, nil
 }
 
@@ -176,7 +214,7 @@ type Client struct {
 
 // Dial connects to the daemon.
 func Dial() (*Client, error) {
-	conn, err := net.Dial("unix", paths.IPCSocketPath())
+	conn, err := net.Dial(paths.IPCNetwork(), paths.IPCAddress())
 	if err != nil {
 		return nil, fmt.Errorf("dial daemon: %w", err)
 	}
@@ -205,6 +243,7 @@ func (c *Client) Close() error { return c.conn.Close() }
 type Response struct {
 	OK      bool   `json:"ok"`
 	Error   string `json:"error,omitempty"`
+	Version string `json:"version,omitempty"` // set for CmdVersion replies
 }
 
 // WriteOK sends a success response to a connection.
@@ -227,20 +266,47 @@ func SendStop(c *Client) error {
 	return c.Send(Request{Cmd: CmdStop})
 }
 
+// SendRefreshCIDR is a convenience helper for sending a refresh CIDR command.
+func SendRefreshCIDR(c *Client) error {
+	return c.Send(Request{Cmd: CmdRefreshCIDR})
+}
+
 // SendShutdown is a convenience helper for sending a shutdown command.
 func SendShutdown(c *Client) error {
 	return c.Send(Request{Cmd: CmdShutdown})
 }
 
+// WriteVersion sends a version response to a connection.
+func WriteVersion(conn net.Conn, ver string) error {
+	return writeMsg(conn, Response{OK: true, Version: ver})
+}
+
+// QueryVersion sends a CmdVersion request and reads the daemon's
+// build version. It must be called before any VPN session starts (so
+// no Event messages are in flight on the connection).
+func (c *Client) QueryVersion() (string, error) {
+	if err := c.Send(Request{Cmd: CmdVersion}); err != nil {
+		return "", err
+	}
+	var resp Response
+	if err := readMsg(c.r, &resp); err != nil {
+		return "", err
+	}
+	if !resp.OK {
+		return "", fmt.Errorf("version query failed: %s", resp.Error)
+	}
+	return resp.Version, nil
+}
+
 // RoutingModeFromIPC converts an IPC routing mode string to route.Mode.
 func RoutingModeFromIPC(s string) route.Mode {
 	switch s {
 	case "full":
 		return route.ModeFull
-	case "split":
-		return route.ModeSplit
-	case "custom":
-		return route.ModeCustom
+	case "proxy":
+		return route.ModeProxy
+	case "bypass":
+		return route.ModeBypass
 	default:
 		return route.ModeFull
 	}

internal/keychain/keychain_other.go

@@ -1,8 +1,11 @@
-//go:build !darwin
+//go:build !darwin && !windows
 
 package keychain
 
-// MemStore is an in-memory fallback used on non-darwin platforms.
+// MemStore is an in-memory fallback used on non-darwin, non-windows
+// platforms (currently Linux). Passwords do not persist across
+// restarts; a platform-appropriate backend (e.g. Secret Service)
+// should be added for production use.
 type MemStore struct {
 	data map[string]string
 }

internal/keychain/keychain_windows.go

@@ -0,0 +1,94 @@
+//go:build windows
+
+package keychain
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/danieljoos/wincred"
+)
+
+// keyPrefixes distinguish password vs token entries in the credential
+// store, mirroring the macOS implementation.
+const (
+	passwordAccountPrefix = "password:"
+	tokenAccountPrefix    = "token:"
+)
+
+// WinStore implements Store using the Windows Credential Manager.
+type WinStore struct{}
+
+// New returns a Windows Credential Manager-backed Store.
+func New() Store {
+	return WinStore{}
+}
+
+// targetName builds the credential TargetName from the account prefix
+// and profile name: "<BundleID>/<prefix><profile>".
+func targetName(account string) string {
+	return ServiceName + "/" + account
+}
+
+func (WinStore) setItem(account, secret string) error {
+	cred := wincred.NewGenericCredential(targetName(account))
+	cred.CredentialBlob = []byte(secret)
+	if err := cred.Write(); err != nil {
+		return fmt.Errorf("wincred write %s: %w", account, err)
+	}
+	return nil
+}
+
+func (WinStore) getItem(account string) (string, error) {
+	cred, err := wincred.GetGenericCredential(targetName(account))
+	if err != nil {
+		if errors.Is(err, wincred.ErrElementNotFound) {
+			return "", ErrNotFound
+		}
+		return "", fmt.Errorf("wincred read %s: %w", account, err)
+	}
+	return string(cred.CredentialBlob), nil
+}
+
+func (WinStore) deleteItem(account string) error {
+	cred, err := wincred.GetGenericCredential(targetName(account))
+	if err != nil {
+		if errors.Is(err, wincred.ErrElementNotFound) {
+			return nil // already gone — treat as success
+		}
+		return fmt.Errorf("wincred read %s: %w", account, err)
+	}
+	if err := cred.Delete(); err != nil {
+		return fmt.Errorf("wincred delete %s: %w", account, err)
+	}
+	return nil
+}
+
+func (s WinStore) SetPassword(profileName, password string) error {
+	return s.setItem(passwordAccountPrefix+profileName, password)
+}
+
+func (s WinStore) GetPassword(profileName string) (string, error) {
+	return s.getItem(passwordAccountPrefix + profileName)
+}
+
+func (s WinStore) DeletePassword(profileName string) error {
+	return s.deleteItem(passwordAccountPrefix + profileName)
+}
+
+func (s WinStore) SetToken(profileName, token string) error {
+	return s.setItem(tokenAccountPrefix+profileName, token)
+}
+
+func (s WinStore) GetToken(profileName string) (string, error) {
+	return s.getItem(tokenAccountPrefix + profileName)
+}
+
+func (s WinStore) DeleteToken(profileName string) error {
+	return s.deleteItem(tokenAccountPrefix + profileName)
+}
+
+func (s WinStore) DeleteAll(profileName string) error {
+	_ = s.DeletePassword(profileName)
+	return s.DeleteToken(profileName)
+}

internal/model/model.go

@@ -3,7 +3,9 @@
 package model
 
 import (
+	"encoding/json"
 	"fmt"
+	"net"
 	"strings"
 	"time"
 )
@@ -21,11 +23,26 @@ const (
 type RoutingMode string
 
 const (
-	RoutingFull   RoutingMode = "full"   // 0.0.0.0/0 via tunnel
-	RoutingSplit  RoutingMode = "split"  // only VPN subnet via tunnel
-	RoutingCustom RoutingMode = "custom" // user-specified CIDRs
+	RoutingFull   RoutingMode = "full"   // 全隧道: all traffic via tunnel
+	RoutingProxy  RoutingMode = "proxy"  // 代理CIDR: only specified CIDRs via tunnel
+	RoutingBypass RoutingMode = "bypass" // 绕过CIDR: all traffic via tunnel except specified CIDRs
 )
 
+// FetchTiming specifies when a CIDR URL source is fetched.
+type FetchTiming string
+
+const (
+	FetchBefore FetchTiming = "before" // before proxy: fetched via direct connection before routing is applied
+	FetchAfter  FetchTiming = "after"  // after proxy: fetched via the tunnel after the data plane is up
+)
+
+// CIDRURLSource describes a URL that provides a CIDR list. The list
+// is fetched at FetchTiming and merged into the routing configuration.
+type CIDRURLSource struct {
+	URL         string      `json:"url"`
+	FetchTiming FetchTiming `json:"fetch_timing"` // "before" or "after"
+}
+
 // ServerProfile is a saved VPN server configuration.
 type ServerProfile struct {
 	ID              int64       `json:"id"`
@@ -38,9 +55,16 @@ type ServerProfile struct {
 	Username        string      `json:"username"`
 	AuthMode        AuthMode    `json:"auth_mode"`
 	RoutingMode     RoutingMode `json:"routing_mode"`
-	CustomCIDRs     string     `json:"custom_cidrs"`      // comma-separated, for RoutingCustom
+	CIDRV4          string      `json:"cidr_v4"`      // comma-separated static IPv4 CIDRs
+	CIDRV6          string      `json:"cidr_v6"`      // comma-separated static IPv6 CIDRs
+	CIDRV4URLs      string      `json:"cidr_v4_urls"` // JSON array of CIDRURLSource for IPv4
+	CIDRV6URLs      string      `json:"cidr_v6_urls"` // JSON array of CIDRURLSource for IPv6
 	MTUOverride     int         `json:"mtu_override"` // 0 = use server MTU
 	AutoConnect     bool        `json:"auto_connect"`
+	TLSCACert       string      `json:"tls_ca_cert"`      // inline CA certificate PEM (wss only)
+	TLSCAPath       string      `json:"tls_ca_path"`      // path to CA certificate file (wss only)
+	TLSInsecure     bool        `json:"tls_insecure"`     // skip certificate verification (wss only)
+	TLSPinnedHash   string      `json:"tls_pinned_hash"`  // SHA-256 fingerprint of server leaf cert (wss only)
 	CreatedAt       time.Time   `json:"created_at"`
 	LastConnectedAt *time.Time  `json:"last_connected_at"`
 }
@@ -81,17 +105,57 @@ func (p *ServerProfile) BuildServerURL(ip ...string) string {
 	return fmt.Sprintf("%s://%s:%d%s", protocol, host, port, path)
 }
 
-// GetServerIPList parses ServerIPs into a string slice.
-func (p *ServerProfile) GetServerIPList() []string {
+// ValidateServerIPs parses ServerIPs, returning valid IP addresses
+// and any invalid entries (for UI error reporting).
+func (p *ServerProfile) ValidateServerIPs() (valid []string, invalid []string) {
 	if p.ServerIPs == "" {
+		return nil, nil
+	}
+	for _, part := range strings.Split(p.ServerIPs, ",") {
+		s := strings.TrimSpace(part)
+		if s == "" {
+			continue
+		}
+		if net.ParseIP(s) != nil {
+			valid = append(valid, s)
+		} else {
+			invalid = append(invalid, s)
+		}
+	}
+	return
+}
+
+// GetServerIPList returns only valid IP addresses from ServerIPs,
+// silently filtering out any malformed entries.
+func (p *ServerProfile) GetServerIPList() []string {
+	valid, _ := p.ValidateServerIPs()
+	return valid
+}
+
+// ParseCIDRURLs decodes a JSON-encoded CIDRURLSource array. Returns an
+// empty slice if the string is empty or unparseable.
+func ParseCIDRURLs(jsonStr string) []CIDRURLSource {
+	if jsonStr == "" {
+		return nil
+	}
+	var sources []CIDRURLSource
+	if err := json.Unmarshal([]byte(jsonStr), &sources); err != nil {
+		return nil
+	}
+	return sources
+}
+
+// SplitCIDRs splits a comma-separated CIDR string into a slice,
+// trimming whitespace from each entry and skipping empty ones.
+func SplitCIDRs(s string) []string {
+	if s == "" {
 		return nil
 	}
-	parts := strings.Split(p.ServerIPs, ",")
 	var out []string
-	for _, part := range parts {
-		s := strings.TrimSpace(part)
-		if s != "" {
-			out = append(out, s)
+	for _, part := range strings.Split(s, ",") {
+		c := strings.TrimSpace(part)
+		if c != "" {
+			out = append(out, c)
 		}
 	}
 	return out
@@ -113,6 +177,7 @@ type ConnectionLog struct {
 	StartedAt   time.Time        `json:"started_at"`
 	EndedAt     *time.Time       `json:"ended_at"`
 	AssignedIP  string           `json:"assigned_ip"`
+	AssignedIP6 string           `json:"assigned_ip6"`
 	RxBytes     int64            `json:"rx_bytes"`
 	TxBytes     int64            `json:"tx_bytes"`
 	Status      ConnectionStatus `json:"status"`

internal/paths/paths.go

@@ -57,6 +57,4 @@ func LogFile() string { return Paths.Log + "/lmvpn.log" }
 // DaemonLogFile returns the path to the daemon log file.
 func DaemonLogFile() string { return Paths.Log + "/lmvpn-daemon.log" }
 
-// IPCSocketPath returns the path to the unix domain socket used for
-// GUI <-> daemon communication.
-func IPCSocketPath() string { return "/tmp/lmvpn.sock" }
+

internal/paths/paths_darwin.go

@@ -7,6 +7,18 @@ import (
 	"path/filepath"
 )
 
+// IPCNetwork returns the transport network for GUI <-> daemon IPC.
+func IPCNetwork() string { return "unix" }
+
+// IPCAddress returns the listen/dial address for GUI <-> daemon IPC.
+func IPCAddress() string { return "/tmp/lmvpn.sock" }
+
+// GUILockNetwork returns the transport for the GUI single-instance lock.
+func GUILockNetwork() string { return "unix" }
+
+// GUILockAddress returns the address for the GUI single-instance lock.
+func GUILockAddress() string { return Paths.Data + "/gui.sock" }
+
 func init() {
 	home, _ := os.UserHomeDir()
 	recomputePaths(home)

internal/paths/paths_other.go

@@ -1,4 +1,4 @@
-//go:build !darwin
+//go:build !darwin && !windows
 
 package paths
 
@@ -7,6 +7,18 @@ import (
 	"path/filepath"
 )
 
+// IPCNetwork returns the transport network for GUI <-> daemon IPC.
+func IPCNetwork() string { return "unix" }
+
+// IPCAddress returns the listen/dial address for GUI <-> daemon IPC.
+func IPCAddress() string { return "/tmp/lmvpn.sock" }
+
+// GUILockNetwork returns the transport for the GUI single-instance lock.
+func GUILockNetwork() string { return "unix" }
+
+// GUILockAddress returns the address for the GUI single-instance lock.
+func GUILockAddress() string { return Paths.Data + "/gui.sock" }
+
 func init() {
 	home, _ := os.UserHomeDir()
 	recomputePaths(home)

internal/paths/paths_windows.go

@@ -0,0 +1,55 @@
+//go:build windows
+
+package paths
+
+import (
+	"os"
+	"path/filepath"
+)
+
+// IPCNetwork returns the transport network for GUI <-> daemon IPC.
+// Windows uses TCP because AF_UNIX sockets enforce mandatory
+// integrity-level checks: a socket created by the elevated daemon
+// (High Integrity) cannot be connected to by the non-elevated GUI
+// (Medium Integrity). TCP on 127.0.0.1 has no such restriction.
+func IPCNetwork() string { return "tcp" }
+
+// IPCAddress returns the listen/dial address for GUI <-> daemon IPC.
+// On Windows this is a TCP address on localhost.
+const ipcPort = "18923"
+
+func IPCAddress() string { return "127.0.0.1:" + ipcPort }
+
+// GUILockNetwork returns the transport for the GUI single-instance lock.
+// Windows uses TCP (same reason as IPC: AF_UNIX integrity-level checks).
+func GUILockNetwork() string { return "tcp" }
+
+// GUILockAddress returns the address for the GUI single-instance lock.
+func GUILockAddress() string { return "127.0.0.1:18924" }
+
+func init() {
+	home, _ := os.UserHomeDir()
+	recomputePaths(home)
+}
+
+// recomputePaths sets Paths based on the given home directory.
+// On Windows the layout follows platform conventions:
+//
+//	%APPDATA%\<BundleID>\      data (db, config)
+//	%LOCALAPPDATA%\<BundleID>\ cache
+//	%LOCALAPPDATA%\<BundleID>\Logs\  logs
+func recomputePaths(home string) {
+	appData := os.Getenv("APPDATA")
+	if appData == "" {
+		appData = filepath.Join(home, "AppData", "Roaming")
+	}
+	localAppData := os.Getenv("LOCALAPPDATA")
+	if localAppData == "" {
+		localAppData = filepath.Join(home, "AppData", "Local")
+	}
+	Paths = Dirs{
+		Data:  filepath.Join(appData, BundleID),
+		Cache: filepath.Join(localAppData, BundleID),
+		Log:   filepath.Join(localAppData, BundleID, "Logs"),
+	}
+}

internal/protocol/protocol.go

@@ -31,13 +31,16 @@ const (
 )
 
 // InitMessage is sent by the server after auth + pre-checks pass.
-// (server: protocol.go:3-9, tunnel.go:126-137)
+// (server: protocol.go:3-10, tunnel.go:134-145)
 type InitMessage struct {
 	Type      string `json:"type"`
-	IP       string `json:"ip"`        // assigned client IP (dotted-quad)
-	Prefix   int    `json:"prefix"`    // subnet prefix length (e.g. 24)
+	IP        string `json:"ip"`                   // assigned client IPv4 (dotted-quad)
+	Prefix    int    `json:"prefix"`               // IPv4 subnet prefix length (e.g. 24)
 	MTU       int    `json:"mtu"`                  // TUN device MTU (e.g. 1420)
-	ServerIP string `json:"server_ip"` // server's tunnel IP (peer/gateway)
+	ServerIP  string `json:"server_ip"`            // server's tunnel IPv4 (peer/gateway)
+	IP6       string `json:"ip6,omitempty"`        // assigned client IPv6 (only when server has Subnet6)
+	Prefix6   int    `json:"prefix6,omitempty"`    // IPv6 subnet prefix length
+	ServerIP6 string `json:"server_ip6,omitempty"` // server's tunnel IPv6
 }
 
 // ControlMessage is the generic text control message.
@@ -66,3 +69,39 @@ type AuthResponse struct {
 func IsError(msgType string) bool {
 	return msgType == TypeAuthErr || msgType == TypeError
 }
+
+// AuthErrorCode is a stable, locale-independent identifier for a fatal
+// authentication failure. It is derived from the server's auth_err
+// message (or HTTP status for the JWT login path) and carried over IPC
+// to the GUI, which maps it to a localized user-facing string.
+type AuthErrorCode string
+
+const (
+	AuthCodeWrongCredentials AuthErrorCode = "wrong_credentials" // 用户名或密码错误 / HTTP 401,403
+	AuthCodeUserDisabled     AuthErrorCode = "user_disabled"     // 用户不存在或已禁用
+	AuthCodeTokenInvalid     AuthErrorCode = "token_invalid"     // 令牌无效或已过期
+	AuthCodeRateLimited      AuthErrorCode = "rate_limited"      // 认证尝试过于频繁 / HTTP 429
+	AuthCodeMalformed        AuthErrorCode = "malformed"         // 消息格式错误
+)
+
+// AuthErrorCodeFromMessage maps a server auth_err message string to a
+// stable AuthErrorCode. It returns the empty string for an unrecognized
+// message, in which case the caller should treat the failure as
+// non-categorical (and typically still fatal, since the server closes
+// the connection after auth_err).
+func AuthErrorCodeFromMessage(msg string) AuthErrorCode {
+	switch msg {
+	case "用户名或密码错误":
+		return AuthCodeWrongCredentials
+	case "用户不存在或已禁用":
+		return AuthCodeUserDisabled
+	case "令牌无效或已过期":
+		return AuthCodeTokenInvalid
+	case "认证尝试过于频繁，请稍后再试":
+		return AuthCodeRateLimited
+	case "消息格式错误":
+		return AuthCodeMalformed
+	default:
+		return ""
+	}
+}

internal/route/cidrmerge.go

@@ -0,0 +1,210 @@
+// cidrmerge.go merges adjacent CIDR blocks to reduce the total number
+// of routes. For example, 1.0.1.0/24 + 1.0.2.0/23 -> 1.0.0.0/22.
+// This is critical for large lists like chnroute (8786 entries) where
+// many blocks can be merged, cutting the route count by 50-70%.
+package route
+
+import (
+	"net"
+	"sort"
+)
+
+// mergeCIDRs takes a list of CIDR strings, parses them, merges
+// adjacent blocks, and returns a deduplicated, minimized list.
+// Invalid CIDR strings are silently skipped.
+func mergeCIDRs(cidrs []string) []string {
+	if len(cidrs) == 0 {
+		return nil
+	}
+
+	var nets []netEntry
+	for _, s := range cidrs {
+		_, n, err := net.ParseCIDR(s)
+		if err != nil {
+			continue
+		}
+		ones, _ := n.Mask.Size()
+		isV6 := n.IP.To4() == nil
+		if isV6 {
+			nets = append(nets, netEntry{ip: n.IP.To16(), bits: ones})
+		} else {
+			nets = append(nets, netEntry{ip: n.IP.To4(), bits: ones})
+		}
+	}
+
+	// Split into v4 and v6, merge separately.
+	var v4nets, v6nets []netEntry
+	for _, n := range nets {
+		if n.ip.To4() != nil && len(n.ip) == 4 {
+			v4nets = append(v4nets, n)
+		} else if n.ip.To4() == nil && len(n.ip) == 16 {
+			v6nets = append(v6nets, n)
+		}
+	}
+
+	mergedV4 := mergeNets(v4nets, 32)
+	mergedV6 := mergeNets(v6nets, 128)
+
+	var result []string
+	for _, n := range mergedV4 {
+		result = append(result, n.ip.String()+"/"+itoa(n.bits))
+	}
+	for _, n := range mergedV6 {
+		result = append(result, n.ip.String()+"/"+itoa(n.bits))
+	}
+	return result
+}
+
+type netEntry struct {
+	ip   net.IP
+	bits int
+}
+
+type sortableNet struct {
+	ip   []byte
+	bits int
+}
+
+func mergeNets(nets []netEntry, maxBits int) []netEntry {
+	if len(nets) == 0 {
+		return nil
+	}
+
+	// Convert to sortable form.
+	var sn []sortableNet
+	for _, n := range nets {
+		sn = append(sn, sortableNet{ip: []byte(n.ip), bits: n.bits})
+	}
+
+	// Sort by IP then by prefix length (more specific first).
+	sort.Slice(sn, func(i, j int) bool {
+		return cmpIP(sn[i].ip, sn[j].ip) < 0 ||
+			(cmpIP(sn[i].ip, sn[j].ip) == 0 && sn[i].bits < sn[j].bits)
+	})
+
+	// Merge: repeatedly try to combine pairs into supernets.
+	// Two adjacent /n networks can merge into a /(n-1) if:
+	// 1. Both have the same prefix length n
+	// 2. Their network addresses differ only in bit n (i.e. one ends in 0, the other in 1 at position n)
+	// 3. The merged address has bit n cleared
+	changed := true
+	for changed {
+		changed = false
+		var merged []sortableNet
+		i := 0
+		for i < len(sn) {
+			if i+1 < len(sn) && canMerge(sn[i], sn[i+1], maxBits) {
+				mergedNet := mergePair(sn[i], maxBits)
+				merged = append(merged, mergedNet)
+				i += 2
+				changed = true
+			} else {
+				merged = append(merged, sn[i])
+				i++
+			}
+		}
+		sn = merged
+		// Re-sort after merge (merged pairs may be out of order).
+		if changed {
+			sort.Slice(sn, func(i, j int) bool {
+				return cmpIP(sn[i].ip, sn[j].ip) < 0 ||
+					(cmpIP(sn[i].ip, sn[j].ip) == 0 && sn[i].bits < sn[j].bits)
+			})
+		}
+	}
+
+	// Convert back.
+	var result []netEntry
+	for _, n := range sn {
+		result = append(result, netEntry{ip: net.IP(n.ip), bits: n.bits})
+	}
+	return result
+}
+
+func canMerge(a, b sortableNet, maxBits int) bool {
+	if a.bits != b.bits || a.bits == 0 {
+		return false
+	}
+	if len(a.ip) != len(b.ip) {
+		return false
+	}
+	// Check that they share the same prefix up to bit (a.bits - 1).
+	prefixBits := a.bits - 1
+	byteIdx := prefixBits / 8
+	bitIdx := uint(7 - (prefixBits % 8))
+
+	// All bytes before byteIdx must be equal.
+	for k := 0; k < byteIdx; k++ {
+		if a.ip[k] != b.ip[k] {
+			return false
+		}
+	}
+	// In byteIdx, bits above bitIdx must be equal.
+	mask := byte(0xFF << (bitIdx + 1))
+	if a.ip[byteIdx]&mask != b.ip[byteIdx]&mask {
+		return false
+	}
+	// The bit at bitIdx must differ (one is 0, one is 1).
+	bitA := (a.ip[byteIdx] >> bitIdx) & 1
+	bitB := (b.ip[byteIdx] >> bitIdx) & 1
+	if bitA == bitB {
+		return false
+	}
+	// The lower bits of both must be zero (network address).
+	lowerMask := byte(1<<bitIdx) - 1
+	if a.ip[byteIdx]&lowerMask != 0 || b.ip[byteIdx]&lowerMask != 0 {
+		return false
+	}
+	// All bytes after byteIdx must be zero.
+	for k := byteIdx + 1; k < len(a.ip); k++ {
+		if a.ip[k] != 0 || b.ip[k] != 0 {
+			return false
+		}
+	}
+	return true
+}
+
+func mergePair(a sortableNet, maxBits int) sortableNet {
+	result := make([]byte, len(a.ip))
+	copy(result, a.ip)
+	// Clear the bit at position (a.bits - 1).
+	prefixBits := a.bits - 1
+	byteIdx := prefixBits / 8
+	bitIdx := uint(7 - (prefixBits % 8))
+	result[byteIdx] &^= 1 << bitIdx
+	return sortableNet{ip: result, bits: a.bits - 1}
+}
+
+func cmpIP(a, b []byte) int {
+	for i := 0; i < len(a) && i < len(b); i++ {
+		if a[i] < b[i] {
+			return -1
+		}
+		if a[i] > b[i] {
+			return 1
+		}
+	}
+	return len(a) - len(b)
+}
+
+func itoa(n int) string {
+	if n == 0 {
+		return "0"
+	}
+	var buf [20]byte
+	pos := len(buf)
+	negative := n < 0
+	if negative {
+		n = -n
+	}
+	for n > 0 {
+		pos--
+		buf[pos] = byte('0' + n%10)
+		n /= 10
+	}
+	if negative {
+		pos--
+		buf[pos] = '-'
+	}
+	return string(buf[pos:])
+}

internal/route/route.go

@@ -1,19 +1,37 @@
 // Package route manages VPN routing on the client. It supports three
 // modes:
 //
-//   - Full tunnel:   all traffic (0.0.0.0/0) via the TUN interface,
-//                    with a bypass route for the server's public IP so
-//                    the WebSocket connection stays on the physical NIC
-//   - Split tunnel:  only the VPN virtual subnet via the TUN interface
-//   - Custom:        user-specified CIDRs via the TUN interface
+//   - Full tunnel:   all traffic (0.0.0.0/0 and ::/0) via the TUN
+//     interface, with bypass routes for the server's
+//     public IP (v4 and v6) so the WebSocket connection
+//     stays on the physical NIC
+//   - Proxy CIDR:    only the specified CIDRs (v4 and v6) via TUN
+//   - Bypass CIDR:   all traffic via TUN except the specified CIDRs,
+//     which are routed via the original gateway
 //
-// All routes are tracked so they can be cleanly removed on disconnect.
+// Routing is applied in two phases to avoid blocking the server's
+// ReadyTimeout:
+//
+//   - Apply (essential): server bypass + /1 cover routes (4-6 commands,
+//     <1s). Runs inside the handshake before "ready" is sent.
+//   - ApplyDeferred: user CIDR routes (potentially thousands). Runs in
+//     a background goroutine after the tunnel is up. Uses batch script
+//     execution to minimize process creation overhead.
+//
+// IPv6 routes are applied automatically when the server assigned an
+// IPv6 address (Config.VPNIP6 != ""). All routes are tracked so they
+// can be cleanly removed on disconnect.
 package route
 
 import (
+	"context"
 	"fmt"
 	"net"
 	"strings"
+	"sync"
+	"time"
+
+	"lmvpn/internal/log"
 )
 
 // Mode selects which traffic goes through the VPN tunnel.
@@ -21,27 +39,39 @@ type Mode string
 
 const (
 	ModeFull   Mode = "full"
-	ModeSplit  Mode = "split"
-	ModeCustom Mode = "custom"
+	ModeProxy  Mode = "proxy"
+	ModeBypass Mode = "bypass"
 )
 
 // Config describes the desired routing configuration.
 type Config struct {
 	Mode          Mode
 	InterfaceName string   // e.g. "utun4"
-	VPNIP         string   // assigned tunnel IP, e.g. "192.168.77.5"
-	VPNPrefix     int      // subnet prefix, e.g. 24
+	VPNIP         string   // assigned tunnel IPv4, e.g. "192.168.77.5"
+	VPNPrefix     int      // IPv4 subnet prefix, e.g. 24
+	VPNIP6        string   // assigned tunnel IPv6 (empty = v4-only)
+	VPNPrefix6    int      // IPv6 subnet prefix
 	ServerHost    string   // server hostname/IP (for full-tunnel bypass)
-	CustomCIDRs   []string // for ModeCustom
+	CIDRs         []string // CIDR list for ModeProxy and ModeBypass
 }
 
 // Manager applies and removes routes. It tracks all added routes so
-// they can be cleaned up deterministically.
+// they can be cleaned up deterministically. All methods are safe for
+// concurrent use (Apply/ApplyDeferred may run in one goroutine while
+// Cleanup runs in another).
 type Manager struct {
+	mu               sync.Mutex
 	cfg              Config
-	addedRoutes     []string // route specs added, for deletion
+	addedRoutes      []string // v4 route specs added via TUN, for deletion
+	addedRoutes6     []string // v6 route specs added via TUN, for deletion
+	bypassRoutes     []string // v4 bypass route specs added via gateway
+	bypassRoutes6    []string // v6 bypass route specs added via gateway
 	serverBypass     bool
+	serverBypass6    bool
 	originalGateway  string
+	originalGateway6 string
+	serverIP         string // resolved v4 (for bypass delete)
+	serverIP6        string // resolved v6 (for bypass delete)
 }
 
 // NewManager creates a route manager for the given configuration.
@@ -49,130 +79,458 @@ func NewManager(cfg Config) *Manager {
 	return &Manager{cfg: cfg}
 }
 
-// Apply adds routes according to the configured mode.
+// Apply adds essential routes that must be in place before the VPN
+// tunnel "ready" signal is sent. This completes in <1 second (4-6
+// route commands). User CIDR routes are deferred to ApplyDeferred.
 func (m *Manager) Apply() error {
 	switch m.cfg.Mode {
 	case ModeFull:
 		return m.applyFull()
-	case ModeSplit:
-		return m.applySplit()
-	case ModeCustom:
-		return m.applyCustom()
+	case ModeProxy:
+		return m.applyProxyEssential()
+	case ModeBypass:
+		return m.applyBypassEssential()
 	default:
 		return fmt.Errorf("unknown routing mode: %s", m.cfg.Mode)
 	}
 }
 
-// Cleanup removes all routes that were added by Apply.
-func (m *Manager) Cleanup() error {
+// ApplyDeferred adds user CIDR routes that were deferred from Apply.
+// This should be called in a background goroutine after the tunnel is
+// up. For full-tunnel mode this is a no-op. For proxy/bypass modes it
+// uses batch script execution to handle potentially thousands of CIDRs
+// efficiently.
+func (m *Manager) ApplyDeferred() error {
+	switch m.cfg.Mode {
+	case ModeFull:
+		return nil
+	case ModeProxy:
+		return m.applyProxyDeferred()
+	case ModeBypass:
+		return m.applyBypassDeferred()
+	default:
+		return nil
+	}
+}
+
+// AddRoutes dynamically adds routes for additional CIDRs after the
+// initial Apply/ApplyDeferred. This is used for CIDRs fetched from URLs
+// after the tunnel is established. Uses batch execution.
+func (m *Manager) AddRoutes(cidrs []string) error {
+	if len(cidrs) == 0 {
+		return nil
+	}
+
+	// Merge CIDRs to reduce route count.
+	merged := mergeCIDRs(cidrs)
+	logRouteMerge(len(cidrs), len(merged))
+
+	// Split CIDRs by family.
+	var v4, v6 []string
+	for _, cidr := range merged {
+		cidr = strings.TrimSpace(cidr)
+		if cidr == "" {
+			continue
+		}
+		if isIPv6CIDR(cidr) {
+			v6 = append(v6, cidr)
+		} else {
+			v4 = append(v4, cidr)
+		}
+	}
+
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
 	var errs []string
-	for _, r := range m.addedRoutes {
+
+	if m.cfg.Mode == ModeBypass {
+		if len(v4) > 0 && m.originalGateway != "" {
+			if err := addRoutesViaBatch(v4, m.originalGateway); err != nil {
+				errs = append(errs, err.Error())
+			} else {
+				m.bypassRoutes = append(m.bypassRoutes, v4...)
+			}
+		}
+		if len(v6) > 0 && m.originalGateway6 != "" {
+			if err := addRoutesVia6Batch(v6, m.originalGateway6); err != nil {
+				errs = append(errs, err.Error())
+			} else {
+				m.bypassRoutes6 = append(m.bypassRoutes6, v6...)
+			}
+		}
+	} else {
+		if len(v4) > 0 {
+			if err := addRoutesBatch(v4, m.cfg.InterfaceName); err != nil {
+				errs = append(errs, err.Error())
+			} else {
+				m.addedRoutes = append(m.addedRoutes, v4...)
+			}
+		}
+		if len(v6) > 0 {
+			if err := addRoutes6Batch(v6, m.cfg.InterfaceName); err != nil {
+				errs = append(errs, err.Error())
+			} else {
+				m.addedRoutes6 = append(m.addedRoutes6, v6...)
+			}
+		}
+	}
+
+	if len(errs) > 0 {
+		return fmt.Errorf("add routes errors: %s", strings.Join(errs, "; "))
+	}
+	return nil
+}
+
+// HasOriginalGateway reports whether the manager captured an original
+// default gateway (v4 or v6) during Apply.
+func (m *Manager) HasOriginalGateway() bool {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	return m.originalGateway != "" || m.originalGateway6 != ""
+}
+
+// OriginalGatewayV4 returns the captured IPv4 default gateway, if any.
+func (m *Manager) OriginalGatewayV4() string {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	return m.originalGateway
+}
+
+// OriginalGatewayV6 returns the captured IPv6 default gateway, if any.
+func (m *Manager) OriginalGatewayV6() string {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	return m.originalGateway6
+}
+
+// Cleanup removes all routes that were added by Apply, ApplyDeferred,
+// or AddRoutes. Safe to call concurrently with ApplyDeferred.
+func (m *Manager) Cleanup() error {
+	m.mu.Lock()
+	// Snapshot all route lists under the lock, then clear them.
+	addedRoutes := m.addedRoutes
+	addedRoutes6 := m.addedRoutes6
+	bypassRoutes := m.bypassRoutes
+	bypassRoutes6 := m.bypassRoutes6
+	serverBypass := m.serverBypass
+	serverBypass6 := m.serverBypass6
+	originalGateway := m.originalGateway
+	originalGateway6 := m.originalGateway6
+	serverIP := m.serverIP
+	serverIP6 := m.serverIP6
+	m.addedRoutes = nil
+	m.addedRoutes6 = nil
+	m.bypassRoutes = nil
+	m.bypassRoutes6 = nil
+	m.serverBypass = false
+	m.serverBypass6 = false
+	m.mu.Unlock()
+
+	var errs []string
+
+	// Delete user CIDR routes. Use batch for large lists.
+	if len(addedRoutes) > 3 {
+		if err := deleteRoutesBatch(addedRoutes, m.cfg.InterfaceName); err != nil {
+			errs = append(errs, err.Error())
+		}
+	} else {
+		for _, r := range addedRoutes {
 			if err := deleteRoute(r, m.cfg.InterfaceName); err != nil {
 				errs = append(errs, err.Error())
 			}
 		}
-	m.addedRoutes = nil
-	if m.serverBypass {
-		if err := m.deleteServerBypass(); err != nil {
+	}
+	if len(addedRoutes6) > 3 {
+		if err := deleteRoutes6Batch(addedRoutes6, m.cfg.InterfaceName); err != nil {
 			errs = append(errs, err.Error())
 		}
-		m.serverBypass = false
+	} else {
+		for _, r := range addedRoutes6 {
+			if err := deleteRoute6(r, m.cfg.InterfaceName); err != nil {
+				errs = append(errs, err.Error())
 			}
+		}
+	}
+
+	// Delete bypass routes via gateway.
+	if len(bypassRoutes) > 3 {
+		if err := deleteRoutesViaBatch(bypassRoutes, originalGateway); err != nil {
+			errs = append(errs, err.Error())
+		}
+	} else {
+		for _, r := range bypassRoutes {
+			if err := deleteRouteVia(r, originalGateway); err != nil {
+				errs = append(errs, err.Error())
+			}
+		}
+	}
+	if len(bypassRoutes6) > 3 {
+		if err := deleteRoutesVia6Batch(bypassRoutes6, originalGateway6); err != nil {
+			errs = append(errs, err.Error())
+		}
+	} else {
+		for _, r := range bypassRoutes6 {
+			if err := deleteRouteVia6(r, originalGateway6); err != nil {
+				errs = append(errs, err.Error())
+			}
+		}
+	}
+
+	// Delete server bypass routes.
+	if serverBypass && serverIP != "" {
+		if err := deleteRouteVia(serverIP+"/32", originalGateway); err != nil {
+			errs = append(errs, err.Error())
+		}
+	}
+	if serverBypass6 && serverIP6 != "" && originalGateway6 != "" {
+		if err := deleteRouteVia6(serverIP6+"/128", originalGateway6); err != nil {
+			errs = append(errs, err.Error())
+		}
+	}
+
 	if len(errs) > 0 {
 		return fmt.Errorf("cleanup errors: %s", strings.Join(errs, "; "))
 	}
 	return nil
 }
 
-func (m *Manager) applyFull() error {
-	// Capture the current default gateway before modifying routes.
+// captureGatewaysAndBypass resolves the server host and adds bypass
+// routes for the server's public IPs via the original gateway. This
+// is shared by applyFull and applyBypassEssential.
+func (m *Manager) captureGatewaysAndBypass() error {
+	// Capture the current default gateways before modifying routes.
 	gw, err := defaultGateway()
 	if err != nil {
 		return fmt.Errorf("get default gateway: %w", err)
 	}
 	m.originalGateway = gw
 
-	// Resolve server host to an IP for the bypass route.
-	serverIP, err := resolveHost(m.cfg.ServerHost)
+	// IPv6 default gateway is best-effort.
+	gw6, _ := defaultGateway6()
+	m.originalGateway6 = gw6
+
+	// Resolve server host to v4 + v6 IPs for bypass routes.
+	v4, v6, err := resolveHosts(m.cfg.ServerHost)
 	if err != nil {
 		return fmt.Errorf("resolve server host %s: %w", m.cfg.ServerHost, err)
 	}
+	m.serverIP = v4
+	m.serverIP6 = v6
 
-	// Bypass: server's public IP via the original gateway (so the WS
-	// connection doesn't loop through the tunnel).
-	bypassSpec := serverIP + "/32"
+	// Bypass: server's public IPv4 via the original gateway.
+	if v4 != "" {
+		bypassSpec := v4 + "/32"
 		if err := addRouteVia(bypassSpec, gw); err != nil {
 			return fmt.Errorf("add server bypass route: %w", err)
 		}
 		m.serverBypass = true
+	}
 
-	// Two /1 routes cover the entire IPv4 space and are more specific
-	// than the default route (0.0.0.0/0), so they take precedence
-	// without removing the original default.
+	// Bypass: server's public IPv6 via the original v6 gateway.
+	if v6 != "" && gw6 != "" {
+		bypassSpec := v6 + "/128"
+		if err := addRouteVia6(bypassSpec, gw6); err != nil {
+			m.serverBypass6 = false
+		} else {
+			m.serverBypass6 = true
+		}
+	}
+	return nil
+}
+
+func (m *Manager) applyFull() error {
+	if err := m.captureGatewaysAndBypass(); err != nil {
+		return err
+	}
+
+	// Two /1 routes cover the entire IPv4 space.
 	for _, cidr := range []string{"0.0.0.0/1", "128.0.0.0/1"} {
 		if err := addRoute(cidr, m.cfg.InterfaceName); err != nil {
 			return fmt.Errorf("add route %s: %w", cidr, err)
 		}
 		m.addedRoutes = append(m.addedRoutes, cidr)
 	}
+
+	// IPv6 full tunnel cover routes.
+	if m.cfg.VPNIP6 != "" {
+		for _, cidr := range []string{"::/1", "8000::/1"} {
+			if err := addRoute6(cidr, m.cfg.InterfaceName); err != nil {
+				return fmt.Errorf("add route6 %s: %w", cidr, err)
+			}
+			m.addedRoutes6 = append(m.addedRoutes6, cidr)
+		}
+	}
 	return nil
 }
 
-func (m *Manager) applySplit() error {
-	subnet := vpnSubnet(m.cfg.VPNIP, m.cfg.VPNPrefix)
-	if err := addRoute(subnet, m.cfg.InterfaceName); err != nil {
-		return fmt.Errorf("add split route %s: %w", subnet, err)
-	}
-	m.addedRoutes = append(m.addedRoutes, subnet)
+// applyProxyEssential does nothing - proxy mode has no essential
+// routes. All user CIDR routes are deferred.
+func (m *Manager) applyProxyEssential() error {
 	return nil
 }
 
-func (m *Manager) applyCustom() error {
-	for _, cidr := range m.cfg.CustomCIDRs {
+// applyProxyDeferred adds all user CIDR routes via the TUN interface
+// using batch execution. CIDRs are merged to minimize route count.
+func (m *Manager) applyProxyDeferred() error {
+	merged := mergeCIDRs(m.cfg.CIDRs)
+	logRouteMerge(len(m.cfg.CIDRs), len(merged))
+
+	var v4, v6 []string
+	for _, cidr := range merged {
 		cidr = strings.TrimSpace(cidr)
 		if cidr == "" {
 			continue
 		}
-		if err := addRoute(cidr, m.cfg.InterfaceName); err != nil {
-			return fmt.Errorf("add custom route %s: %w", cidr, err)
+		if isIPv6CIDR(cidr) {
+			v6 = append(v6, cidr)
+		} else {
+			v4 = append(v4, cidr)
 		}
-		m.addedRoutes = append(m.addedRoutes, cidr)
+	}
+
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	var errs []string
+	if len(v4) > 0 {
+		if err := addRoutesBatch(v4, m.cfg.InterfaceName); err != nil {
+			errs = append(errs, err.Error())
+		} else {
+			m.addedRoutes = append(m.addedRoutes, v4...)
+		}
+	}
+	if len(v6) > 0 {
+		if err := addRoutes6Batch(v6, m.cfg.InterfaceName); err != nil {
+			errs = append(errs, err.Error())
+		} else {
+			m.addedRoutes6 = append(m.addedRoutes6, v6...)
+		}
+	}
+	if len(errs) > 0 {
+		return fmt.Errorf("proxy deferred: %s", strings.Join(errs, "; "))
 	}
 	return nil
 }
 
-func (m *Manager) deleteServerBypass() error {
-	serverIP, err := resolveHost(m.cfg.ServerHost)
-	if err != nil {
-		return nil // best-effort
-	}
-	return deleteRouteVia(serverIP+"/32", m.originalGateway)
+// applyBypassEssential adds server bypass + /1 cover routes (full
+// tunnel effect). User bypass CIDRs are deferred to allow the "ready"
+// signal to be sent promptly.
+func (m *Manager) applyBypassEssential() error {
+	if err := m.captureGatewaysAndBypass(); err != nil {
+		return err
 	}
 
-// vpnSubnet computes the network CIDR from an IP and prefix.
-func vpnSubnet(ipStr string, prefix int) string {
-	ip := net.ParseIP(ipStr)
-	if ip == nil {
-		return ipStr + "/" + fmt.Sprint(prefix)
+	// Two /1 routes cover the entire IPv4 space (full tunnel).
+	for _, cidr := range []string{"0.0.0.0/1", "128.0.0.0/1"} {
+		if err := addRoute(cidr, m.cfg.InterfaceName); err != nil {
+			return fmt.Errorf("add route %s: %w", cidr, err)
 		}
-	mask := net.CIDRMask(prefix, 32)
-	network := ip.Mask(mask)
-	return fmt.Sprintf("%s/%d", network.String(), prefix)
+		m.addedRoutes = append(m.addedRoutes, cidr)
 	}
 
-// resolveHost resolves a hostname to an IP address. If already an IP,
-// returns it directly.
-func resolveHost(host string) (string, error) {
-	if net.ParseIP(host) != nil {
-		return host, nil
+	// IPv6 full tunnel cover routes.
+	if m.cfg.VPNIP6 != "" {
+		for _, cidr := range []string{"::/1", "8000::/1"} {
+			if err := addRoute6(cidr, m.cfg.InterfaceName); err != nil {
+				return fmt.Errorf("add route6 %s: %w", cidr, err)
 			}
-	// Strip port if present.
-	if h, _, err := net.SplitHostPort(host); err == nil {
+			m.addedRoutes6 = append(m.addedRoutes6, cidr)
+		}
+	}
+	return nil
+}
+
+// applyBypassDeferred adds user bypass CIDR routes via the original
+// gateway using batch execution. CIDRs are merged to minimize route
+// count.
+func (m *Manager) applyBypassDeferred() error {
+	merged := mergeCIDRs(m.cfg.CIDRs)
+	logRouteMerge(len(m.cfg.CIDRs), len(merged))
+
+	var v4, v6 []string
+	for _, cidr := range merged {
+		cidr = strings.TrimSpace(cidr)
+		if cidr == "" {
+			continue
+		}
+		if isIPv6CIDR(cidr) {
+			if m.originalGateway6 != "" {
+				v6 = append(v6, cidr)
+			}
+		} else {
+			v4 = append(v4, cidr)
+		}
+	}
+
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	var errs []string
+	if len(v4) > 0 {
+		if err := addRoutesViaBatch(v4, m.originalGateway); err != nil {
+			errs = append(errs, err.Error())
+		} else {
+			m.bypassRoutes = append(m.bypassRoutes, v4...)
+		}
+	}
+	if len(v6) > 0 {
+		if err := addRoutesVia6Batch(v6, m.originalGateway6); err != nil {
+			errs = append(errs, err.Error())
+		} else {
+			m.bypassRoutes6 = append(m.bypassRoutes6, v6...)
+		}
+	}
+	if len(errs) > 0 {
+		return fmt.Errorf("bypass deferred: %s", strings.Join(errs, "; "))
+	}
+	return nil
+}
+
+// resolveHosts resolves a hostname to its first IPv4 and IPv6 addresses.
+// If host is already an IP literal, it is returned directly. The DNS
+// lookup is bounded to 5 seconds.
+func resolveHosts(host string) (v4, v6 string, err error) {
+	if ip := net.ParseIP(host); ip != nil {
+		if ip.To4() != nil {
+			return ip.String(), "", nil
+		}
+		return "", ip.String(), nil
+	}
+	if h, _, e := net.SplitHostPort(host); e == nil {
 		host = h
 	}
-	ips, err := net.LookupIP(host)
-	if err != nil || len(ips) == 0 {
-		return "", fmt.Errorf("lookup %s: %w", host, err)
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+	addrs, err := net.DefaultResolver.LookupIPAddr(ctx, host)
+	if err != nil || len(addrs) == 0 {
+		return "", "", fmt.Errorf("lookup %s: %w", host, err)
+	}
+	for _, addr := range addrs {
+		if v4 == "" && addr.IP.To4() != nil {
+			v4 = addr.IP.String()
+		} else if v6 == "" && addr.IP.To4() == nil {
+			v6 = addr.IP.String()
+		}
+	}
+	if v4 == "" && v6 == "" {
+		return "", "", fmt.Errorf("lookup %s: no addresses", host)
+	}
+	return v4, v6, nil
+}
+
+// isIPv6CIDR reports whether the CIDR string is IPv6.
+func isIPv6CIDR(cidr string) bool {
+	_, ipNet, err := net.ParseCIDR(cidr)
+	if err != nil {
+		return false
+	}
+	return ipNet.IP.To4() == nil
+}
+
+// logRouteMerge logs CIDR merge statistics if any reduction occurred.
+func logRouteMerge(before, after int) {
+	if before > after {
+		log.L().Info("CIDR merge", "before", before, "after", after, "reduced", before-after)
 	}
-	return ips[0].String(), nil
 }

internal/route/route_darwin.go

@@ -4,38 +4,72 @@ package route
 
 import (
 	"fmt"
+	"os"
 	"os/exec"
 	"strings"
+	"sync"
 )
 
 // addRoute adds a route via a network interface (macOS route command).
-//   route add -inet -net <cidr> -interface <iface>
+//
+//	route add -inet <cidr> -interface <iface>
 func addRoute(cidr, iface string) error {
-	return runRoute("add", "-inet", "-net", cidr, "-interface", iface)
+	return runRoute("add", "-inet", cidr, "-interface", iface)
 }
 
 // deleteRoute removes a route via a network interface.
 func deleteRoute(cidr, iface string) error {
-	return runRoute("delete", "-inet", "-net", cidr, "-interface", iface)
+	return runRoute("delete", "-inet", cidr, "-interface", iface)
 }
 
 // addRouteVia adds a route via a gateway IP.
 func addRouteVia(cidr, gateway string) error {
-	return runRoute("add", "-inet", "-net", cidr, gateway)
+	return runRoute("add", "-inet", cidr, gateway)
 }
 
 // deleteRouteVia removes a route via a gateway IP.
 func deleteRouteVia(cidr, gateway string) error {
-	return runRoute("delete", "-inet", "-net", cidr, gateway)
+	return runRoute("delete", "-inet", cidr, gateway)
 }
 
-// defaultGateway returns the current default gateway IP.
+// --- IPv6 variants ---
+
+func addRoute6(cidr, iface string) error {
+	return runRoute("add", "-inet6", cidr, "-interface", iface)
+}
+
+func deleteRoute6(cidr, iface string) error {
+	return runRoute("delete", "-inet6", cidr, "-interface", iface)
+}
+
+func addRouteVia6(cidr, gateway string) error {
+	return runRoute("add", "-inet6", cidr, gateway)
+}
+
+func deleteRouteVia6(cidr, gateway string) error {
+	return runRoute("delete", "-inet6", cidr, gateway)
+}
+
+// defaultGateway returns the current IPv4 default gateway IP.
 func defaultGateway() (string, error) {
 	out, err := exec.Command("route", "-n", "get", "default").Output()
 	if err != nil {
 		return "", err
 	}
-	for _, line := range strings.Split(string(out), "\n") {
+	return parseGateway(string(out))
+}
+
+// defaultGateway6 returns the current IPv6 default gateway IP.
+func defaultGateway6() (string, error) {
+	out, err := exec.Command("route", "-n", "get", "-inet6", "default").Output()
+	if err != nil {
+		return "", err
+	}
+	return parseGateway(string(out))
+}
+
+func parseGateway(out string) (string, error) {
+	for _, line := range strings.Split(out, "\n") {
 		line = strings.TrimSpace(line)
 		if strings.HasPrefix(line, "gateway:") {
 			parts := strings.SplitN(line, ":", 2)
@@ -57,3 +91,136 @@ func runRoute(args ...string) error {
 	}
 	return nil
 }
+
+// --- Batch functions ---
+
+// runBatchScript writes commands to temporary shell scripts and
+// executes them in parallel (up to 4 concurrent scripts). Each line
+// uses "|| true" so that individual route failures don't abort the
+// batch.
+func runBatchScript(lines []string) error {
+	if len(lines) == 0 {
+		return nil
+	}
+
+	// Split lines into up to 4 chunks for parallel execution.
+	const maxChunks = 4
+	chunkSize := (len(lines) + maxChunks - 1) / maxChunks
+	var chunks [][]string
+	for i := 0; i < len(lines); i += chunkSize {
+		end := i + chunkSize
+		if end > len(lines) {
+			end = len(lines)
+		}
+		chunks = append(chunks, lines[i:end])
+	}
+
+	var wg sync.WaitGroup
+	errs := make([]error, len(chunks))
+	for i, chunk := range chunks {
+		wg.Add(1)
+		go func(idx int, c []string) {
+			defer wg.Done()
+			errs[idx] = runSingleScript(c)
+		}(i, chunk)
+	}
+	wg.Wait()
+
+	var errStrs []string
+	for _, e := range errs {
+		if e != nil {
+			errStrs = append(errStrs, e.Error())
+		}
+	}
+	if len(errStrs) > 0 {
+		return fmt.Errorf("batch script: %s", strings.Join(errStrs, "; "))
+	}
+	return nil
+}
+
+func runSingleScript(lines []string) error {
+	f, err := os.CreateTemp("", "lmvpn-routes-*.sh")
+	if err != nil {
+		return fmt.Errorf("create batch script: %w", err)
+	}
+	tmpFile := f.Name()
+	defer os.Remove(tmpFile)
+
+	for _, line := range lines {
+		if _, err := fmt.Fprintln(f, line, "|| true"); err != nil {
+			f.Close()
+			return fmt.Errorf("write batch script: %w", err)
+		}
+	}
+	f.Close()
+
+	cmd := exec.Command("sh", tmpFile)
+	if out, err := cmd.CombinedOutput(); err != nil {
+		return fmt.Errorf("batch: %w (%s)", err, strings.TrimSpace(string(out)))
+	}
+	return nil
+}
+
+func addRoutesBatch(cidrs []string, iface string) error {
+	var lines []string
+	for _, cidr := range cidrs {
+		lines = append(lines, fmt.Sprintf("route add -inet %s -interface %s", cidr, iface))
+	}
+	return runBatchScript(lines)
+}
+
+func deleteRoutesBatch(cidrs []string, iface string) error {
+	var lines []string
+	for _, cidr := range cidrs {
+		lines = append(lines, fmt.Sprintf("route delete -inet %s -interface %s", cidr, iface))
+	}
+	return runBatchScript(lines)
+}
+
+func addRoutes6Batch(cidrs []string, iface string) error {
+	var lines []string
+	for _, cidr := range cidrs {
+		lines = append(lines, fmt.Sprintf("route add -inet6 %s -interface %s", cidr, iface))
+	}
+	return runBatchScript(lines)
+}
+
+func deleteRoutes6Batch(cidrs []string, iface string) error {
+	var lines []string
+	for _, cidr := range cidrs {
+		lines = append(lines, fmt.Sprintf("route delete -inet6 %s -interface %s", cidr, iface))
+	}
+	return runBatchScript(lines)
+}
+
+func addRoutesViaBatch(cidrs []string, gateway string) error {
+	var lines []string
+	for _, cidr := range cidrs {
+		lines = append(lines, fmt.Sprintf("route add -inet %s %s", cidr, gateway))
+	}
+	return runBatchScript(lines)
+}
+
+func deleteRoutesViaBatch(cidrs []string, gateway string) error {
+	var lines []string
+	for _, cidr := range cidrs {
+		lines = append(lines, fmt.Sprintf("route delete -inet %s %s", cidr, gateway))
+	}
+	return runBatchScript(lines)
+}
+
+func addRoutesVia6Batch(cidrs []string, gateway string) error {
+	var lines []string
+	for _, cidr := range cidrs {
+		lines = append(lines, fmt.Sprintf("route add -inet6 %s %s", cidr, gateway))
+	}
+	return runBatchScript(lines)
+}
+
+func deleteRoutesVia6Batch(cidrs []string, gateway string) error {
+	var lines []string
+	for _, cidr := range cidrs {
+		lines = append(lines, fmt.Sprintf("route delete -inet6 %s %s", cidr, gateway))
+	}
+	return runBatchScript(lines)
+}

internal/route/route_linux.go

@@ -1,11 +1,13 @@
-//go:build !darwin
+//go:build !darwin && !windows
 
 package route
 
 import (
 	"fmt"
+	"os"
 	"os/exec"
 	"strings"
+	"sync"
 )
 
 func addRoute(cidr, iface string) error {
@@ -24,12 +26,42 @@ func deleteRouteVia(cidr, gateway string) error {
 	return runCmd("ip", "route", "del", cidr, "via", gateway)
 }
 
+// --- IPv6 variants ---
+
+func addRoute6(cidr, iface string) error {
+	return runCmd("ip", "-6", "route", "add", cidr, "dev", iface)
+}
+
+func deleteRoute6(cidr, iface string) error {
+	return runCmd("ip", "-6", "route", "del", cidr, "dev", iface)
+}
+
+func addRouteVia6(cidr, gateway string) error {
+	return runCmd("ip", "-6", "route", "add", cidr, "via", gateway)
+}
+
+func deleteRouteVia6(cidr, gateway string) error {
+	return runCmd("ip", "-6", "route", "del", cidr, "via", gateway)
+}
+
 func defaultGateway() (string, error) {
 	out, err := exec.Command("ip", "route", "show", "default").Output()
 	if err != nil {
 		return "", err
 	}
-	fields := strings.Fields(strings.TrimSpace(string(out)))
+	return parseViaGateway(string(out))
+}
+
+func defaultGateway6() (string, error) {
+	out, err := exec.Command("ip", "-6", "route", "show", "default").Output()
+	if err != nil {
+		return "", err
+	}
+	return parseViaGateway(string(out))
+}
+
+func parseViaGateway(out string) (string, error) {
+	fields := strings.Fields(strings.TrimSpace(out))
 	for i, f := range fields {
 		if f == "via" && i+1 < len(fields) {
 			return fields[i+1], nil
@@ -45,3 +77,133 @@ func runCmd(name string, args ...string) error {
 	}
 	return nil
 }
+
+// --- Batch functions ---
+
+// runBatchScript writes commands to temporary shell scripts and
+// executes them in parallel (up to 4 concurrent scripts).
+func runBatchScript(lines []string) error {
+	if len(lines) == 0 {
+		return nil
+	}
+
+	const maxChunks = 4
+	chunkSize := (len(lines) + maxChunks - 1) / maxChunks
+	var chunks [][]string
+	for i := 0; i < len(lines); i += chunkSize {
+		end := i + chunkSize
+		if end > len(lines) {
+			end = len(lines)
+		}
+		chunks = append(chunks, lines[i:end])
+	}
+
+	var wg sync.WaitGroup
+	errs := make([]error, len(chunks))
+	for i, chunk := range chunks {
+		wg.Add(1)
+		go func(idx int, c []string) {
+			defer wg.Done()
+			errs[idx] = runSingleScript(c)
+		}(i, chunk)
+	}
+	wg.Wait()
+
+	var errStrs []string
+	for _, e := range errs {
+		if e != nil {
+			errStrs = append(errStrs, e.Error())
+		}
+	}
+	if len(errStrs) > 0 {
+		return fmt.Errorf("batch script: %s", strings.Join(errStrs, "; "))
+	}
+	return nil
+}
+
+func runSingleScript(lines []string) error {
+	f, err := os.CreateTemp("", "lmvpn-routes-*.sh")
+	if err != nil {
+		return fmt.Errorf("create batch script: %w", err)
+	}
+	tmpFile := f.Name()
+	defer os.Remove(tmpFile)
+
+	for _, line := range lines {
+		if _, err := fmt.Fprintln(f, line, "|| true"); err != nil {
+			f.Close()
+			return fmt.Errorf("write batch script: %w", err)
+		}
+	}
+	f.Close()
+
+	cmd := exec.Command("sh", tmpFile)
+	if out, err := cmd.CombinedOutput(); err != nil {
+		return fmt.Errorf("batch: %w (%s)", err, strings.TrimSpace(string(out)))
+	}
+	return nil
+}
+
+func addRoutesBatch(cidrs []string, iface string) error {
+	var lines []string
+	for _, cidr := range cidrs {
+		lines = append(lines, fmt.Sprintf("ip route add %s dev %s", cidr, iface))
+	}
+	return runBatchScript(lines)
+}
+
+func deleteRoutesBatch(cidrs []string, iface string) error {
+	var lines []string
+	for _, cidr := range cidrs {
+		lines = append(lines, fmt.Sprintf("ip route del %s dev %s", cidr, iface))
+	}
+	return runBatchScript(lines)
+}
+
+func addRoutes6Batch(cidrs []string, iface string) error {
+	var lines []string
+	for _, cidr := range cidrs {
+		lines = append(lines, fmt.Sprintf("ip -6 route add %s dev %s", cidr, iface))
+	}
+	return runBatchScript(lines)
+}
+
+func deleteRoutes6Batch(cidrs []string, iface string) error {
+	var lines []string
+	for _, cidr := range cidrs {
+		lines = append(lines, fmt.Sprintf("ip -6 route del %s dev %s", cidr, iface))
+	}
+	return runBatchScript(lines)
+}
+
+func addRoutesViaBatch(cidrs []string, gateway string) error {
+	var lines []string
+	for _, cidr := range cidrs {
+		lines = append(lines, fmt.Sprintf("ip route add %s via %s", cidr, gateway))
+	}
+	return runBatchScript(lines)
+}
+
+func deleteRoutesViaBatch(cidrs []string, gateway string) error {
+	var lines []string
+	for _, cidr := range cidrs {
+		lines = append(lines, fmt.Sprintf("ip route del %s via %s", cidr, gateway))
+	}
+	return runBatchScript(lines)
+}
+
+func addRoutesVia6Batch(cidrs []string, gateway string) error {
+	var lines []string
+	for _, cidr := range cidrs {
+		lines = append(lines, fmt.Sprintf("ip -6 route add %s via %s", cidr, gateway))
+	}
+	return runBatchScript(lines)
+}
+
+func deleteRoutesVia6Batch(cidrs []string, gateway string) error {
+	var lines []string
+	for _, cidr := range cidrs {
+		lines = append(lines, fmt.Sprintf("ip -6 route del %s via %s", cidr, gateway))
+	}
+	return runBatchScript(lines)
+}

internal/route/route_windows.go

@@ -0,0 +1,349 @@
+//go:build windows
+
+package route
+
+import (
+	"fmt"
+	"net"
+	"os"
+	"os/exec"
+	"strings"
+	"sync"
+)
+
+// cidrToNetworkMask splits a CIDR string into network address and
+// dotted-decimal mask, as required by the Windows `route` command.
+func cidrToNetworkMask(cidr string) (network, mask string, err error) {
+	_, ipNet, err := net.ParseCIDR(cidr)
+	if err != nil {
+		return "", "", err
+	}
+	return ipNet.IP.String(), net.IP(ipNet.Mask).String(), nil
+}
+
+// ifaceIndex resolves a Windows interface name to its index.
+func ifaceIndex(name string) (int, error) {
+	ifc, err := net.InterfaceByName(name)
+	if err != nil {
+		return 0, fmt.Errorf("resolve interface %s: %w", name, err)
+	}
+	return ifc.Index, nil
+}
+
+// --- IPv4 ---
+
+func addRoute(cidr, iface string) error {
+	network, mask, err := cidrToNetworkMask(cidr)
+	if err != nil {
+		return err
+	}
+	idx, err := ifaceIndex(iface)
+	if err != nil {
+		return err
+	}
+	return runCmd("route", "add", network, "mask", mask, "0.0.0.0",
+		"if", fmt.Sprintf("%d", idx), "metric", "1")
+}
+
+func deleteRoute(cidr, iface string) error {
+	network, mask, err := cidrToNetworkMask(cidr)
+	if err != nil {
+		return err
+	}
+	return runCmd("route", "delete", network, "mask", mask)
+}
+
+func addRouteVia(cidr, gateway string) error {
+	network, mask, err := cidrToNetworkMask(cidr)
+	if err != nil {
+		return err
+	}
+	return runCmd("route", "add", network, "mask", mask, gateway, "metric", "1")
+}
+
+func deleteRouteVia(cidr, gateway string) error {
+	network, mask, err := cidrToNetworkMask(cidr)
+	if err != nil {
+		return err
+	}
+	return runCmd("route", "delete", network, "mask", mask, gateway)
+}
+
+// --- IPv6 ---
+
+// cidrToV6Prefix splits an IPv6 CIDR into network and prefix length.
+func cidrToV6Prefix(cidr string) (network, prefix string, err error) {
+	_, ipNet, err := net.ParseCIDR(cidr)
+	if err != nil {
+		return "", "", err
+	}
+	ones, _ := ipNet.Mask.Size()
+	return ipNet.IP.String(), fmt.Sprintf("%d", ones), nil
+}
+
+func addRoute6(cidr, iface string) error {
+	network, prefix, err := cidrToV6Prefix(cidr)
+	if err != nil {
+		return err
+	}
+	idx, err := ifaceIndex(iface)
+	if err != nil {
+		return err
+	}
+	return runCmd("route", "-6", "add", network+"/"+prefix, "::",
+		"if", fmt.Sprintf("%d", idx), "metric", "1")
+}
+
+func deleteRoute6(cidr, iface string) error {
+	network, prefix, err := cidrToV6Prefix(cidr)
+	if err != nil {
+		return err
+	}
+	return runCmd("route", "-6", "delete", network+"/"+prefix, "::")
+}
+
+func addRouteVia6(cidr, gateway string) error {
+	network, prefix, err := cidrToV6Prefix(cidr)
+	if err != nil {
+		return err
+	}
+	return runCmd("route", "-6", "add", network+"/"+prefix, gateway, "metric", "1")
+}
+
+func deleteRouteVia6(cidr, gateway string) error {
+	network, prefix, err := cidrToV6Prefix(cidr)
+	if err != nil {
+		return err
+	}
+	return runCmd("route", "-6", "delete", network+"/"+prefix, gateway)
+}
+
+// --- Default gateway ---
+
+func defaultGateway() (string, error) {
+	out, err := exec.Command("route", "print", "0.0.0.0").Output()
+	if err != nil {
+		return "", err
+	}
+	return parseRouteGateway(string(out))
+}
+
+func defaultGateway6() (string, error) {
+	out, err := exec.Command("route", "-6", "print").Output()
+	if err != nil {
+		return "", err
+	}
+	return parseRoute6Gateway(string(out))
+}
+
+// parseRouteGateway extracts the IPv4 default gateway from `route print`
+// output. Looks for the line with Network Destination 0.0.0.0 and
+// Netmask 0.0.0.0, and returns the Gateway column.
+func parseRouteGateway(out string) (string, error) {
+	lines := strings.Split(out, "\n")
+	for _, line := range lines {
+		fields := strings.Fields(line)
+		if len(fields) >= 3 && fields[0] == "0.0.0.0" && fields[1] == "0.0.0.0" {
+			return fields[2], nil
+		}
+	}
+	return "", fmt.Errorf("no default gateway found")
+}
+
+// parseRoute6Gateway extracts the IPv6 default gateway from
+// `route -6 print` output. Looks for ::/0 route and returns the
+// Gateway column.
+func parseRoute6Gateway(out string) (string, error) {
+	lines := strings.Split(out, "\n")
+	for _, line := range lines {
+		fields := strings.Fields(line)
+		for i, f := range fields {
+			if f == "::/0" && i+1 < len(fields) {
+				return fields[i+1], nil
+			}
+		}
+	}
+	return "", fmt.Errorf("no IPv6 default gateway found")
+}
+
+func runCmd(name string, args ...string) error {
+	cmd := exec.Command(name, args...)
+	if out, err := cmd.CombinedOutput(); err != nil {
+		return fmt.Errorf("%s %s: %w (%s)", name, strings.Join(args, " "), err, strings.TrimSpace(string(out)))
+	}
+	return nil
+}
+
+// --- Batch functions ---
+
+// runBatchScript writes commands to temporary .bat files and executes
+// them in parallel (up to 4 concurrent scripts).
+func runBatchScript(lines []string) error {
+	if len(lines) == 0 {
+		return nil
+	}
+
+	const maxChunks = 4
+	chunkSize := (len(lines) + maxChunks - 1) / maxChunks
+	var chunks [][]string
+	for i := 0; i < len(lines); i += chunkSize {
+		end := i + chunkSize
+		if end > len(lines) {
+			end = len(lines)
+		}
+		chunks = append(chunks, lines[i:end])
+	}
+
+	var wg sync.WaitGroup
+	errs := make([]error, len(chunks))
+	for i, chunk := range chunks {
+		wg.Add(1)
+		go func(idx int, c []string) {
+			defer wg.Done()
+			errs[idx] = runSingleScript(c)
+		}(i, chunk)
+	}
+	wg.Wait()
+
+	var errStrs []string
+	for _, e := range errs {
+		if e != nil {
+			errStrs = append(errStrs, e.Error())
+		}
+	}
+	if len(errStrs) > 0 {
+		return fmt.Errorf("batch script: %s", strings.Join(errStrs, "; "))
+	}
+	return nil
+}
+
+func runSingleScript(lines []string) error {
+	f, err := os.CreateTemp("", "lmvpn-routes-*.bat")
+	if err != nil {
+		return fmt.Errorf("create batch script: %w", err)
+	}
+	tmpFile := f.Name()
+	defer os.Remove(tmpFile)
+
+	for _, line := range lines {
+		if _, err := fmt.Fprintln(f, line); err != nil {
+			f.Close()
+			return fmt.Errorf("write batch script: %w", err)
+		}
+	}
+	f.Close()
+
+	cmd := exec.Command("cmd", "/c", tmpFile)
+	if out, err := cmd.CombinedOutput(); err != nil {
+		return fmt.Errorf("batch: %w (%s)", err, strings.TrimSpace(string(out)))
+	}
+	return nil
+}
+
+func addRoutesBatch(cidrs []string, iface string) error {
+	idx, err := ifaceIndex(iface)
+	if err != nil {
+		return err
+	}
+	var lines []string
+	for _, cidr := range cidrs {
+		network, mask, err := cidrToNetworkMask(cidr)
+		if err != nil {
+			continue
+		}
+		lines = append(lines, fmt.Sprintf(
+			"route add %s mask %s 0.0.0.0 if %d metric 1", network, mask, idx))
+	}
+	return runBatchScript(lines)
+}
+
+func deleteRoutesBatch(cidrs []string, iface string) error {
+	var lines []string
+	for _, cidr := range cidrs {
+		network, mask, err := cidrToNetworkMask(cidr)
+		if err != nil {
+			continue
+		}
+		lines = append(lines, fmt.Sprintf("route delete %s mask %s", network, mask))
+	}
+	return runBatchScript(lines)
+}
+
+func addRoutes6Batch(cidrs []string, iface string) error {
+	idx, err := ifaceIndex(iface)
+	if err != nil {
+		return err
+	}
+	var lines []string
+	for _, cidr := range cidrs {
+		network, prefix, err := cidrToV6Prefix(cidr)
+		if err != nil {
+			continue
+		}
+		lines = append(lines, fmt.Sprintf(
+			"route -6 add %s/%s :: if %d metric 1", network, prefix, idx))
+	}
+	return runBatchScript(lines)
+}
+
+func deleteRoutes6Batch(cidrs []string, iface string) error {
+	var lines []string
+	for _, cidr := range cidrs {
+		network, prefix, err := cidrToV6Prefix(cidr)
+		if err != nil {
+			continue
+		}
+		lines = append(lines, fmt.Sprintf("route -6 delete %s/%s ::", network, prefix))
+	}
+	return runBatchScript(lines)
+}
+
+func addRoutesViaBatch(cidrs []string, gateway string) error {
+	var lines []string
+	for _, cidr := range cidrs {
+		network, mask, err := cidrToNetworkMask(cidr)
+		if err != nil {
+			continue
+		}
+		lines = append(lines, fmt.Sprintf(
+			"route add %s mask %s %s metric 1", network, mask, gateway))
+	}
+	return runBatchScript(lines)
+}
+
+func deleteRoutesViaBatch(cidrs []string, gateway string) error {
+	var lines []string
+	for _, cidr := range cidrs {
+		network, mask, err := cidrToNetworkMask(cidr)
+		if err != nil {
+			continue
+		}
+		lines = append(lines, fmt.Sprintf("route delete %s mask %s %s", network, mask, gateway))
+	}
+	return runBatchScript(lines)
+}
+
+func addRoutesVia6Batch(cidrs []string, gateway string) error {
+	var lines []string
+	for _, cidr := range cidrs {
+		network, prefix, err := cidrToV6Prefix(cidr)
+		if err != nil {
+			continue
+		}
+		lines = append(lines, fmt.Sprintf(
+			"route -6 add %s/%s %s metric 1", network, prefix, gateway))
+	}
+	return runBatchScript(lines)
+}
+
+func deleteRoutesVia6Batch(cidrs []string, gateway string) error {
+	var lines []string
+	for _, cidr := range cidrs {
+		network, prefix, err := cidrToV6Prefix(cidr)
+		if err != nil {
+			continue
+		}
+		lines = append(lines, fmt.Sprintf("route -6 delete %s/%s %s", network, prefix, gateway))
+	}
+	return runBatchScript(lines)
+}

internal/stats/stats.go

@@ -19,12 +19,58 @@ const (
 
 // Stats holds live session statistics. Counters are atomic for
 // lock-free reads from the UI/IPC layer.
+//
+// Counters are split by IP address family (v4/v6) at the recording
+// site via AddRx/AddTx, which inspect the IP version nibble. The
+// combined RxBytes/TxBytes are derived as the sum of the per-family
+// counters in Snapshot, so callers that only need the total still
+// work.
 type Stats struct {
-	RxBytes     atomic.Int64
-	TxBytes     atomic.Int64
+	RxBytesV4   atomic.Int64
+	RxBytesV6   atomic.Int64
+	TxBytesV4   atomic.Int64
+	TxBytesV6   atomic.Int64
 	ConnectedAt atomic.Int64 // unix timestamp, 0 = not connected
 	state       atomic.Value // State
-	assignedIP  atomic.Value  // string
+	assignedIP  atomic.Value // string (IPv4)
+	assignedIP6 atomic.Value // string (IPv6, may be empty)
+	routeLoading atomic.Bool  // true while deferred routes are being applied
+	connectStep  atomic.Value // string (human-readable connection step)
+	cidrError    atomic.Value // string (CIDR fetch error message, empty = no error)
+}
+
+// AddRx records a downloaded packet (WebSocket → TUN) of length n,
+// routing the bytes to the v4 or v6 counter based on the IP version
+// nibble of the packet. Packets too short to contain a version byte
+// or with an unknown version are ignored.
+func (s *Stats) AddRx(p []byte) {
+	if len(p) == 0 {
+		return
+	}
+	n := int64(len(p))
+	switch p[0] >> 4 {
+	case 4:
+		s.RxBytesV4.Add(n)
+	case 6:
+		s.RxBytesV6.Add(n)
+	}
+}
+
+// AddTx records an uploaded packet (TUN → WebSocket) of length n,
+// routing the bytes to the v4 or v6 counter based on the IP version
+// nibble of the packet. Packets too short to contain a version byte
+// or with an unknown version are ignored.
+func (s *Stats) AddTx(p []byte) {
+	if len(p) == 0 {
+		return
+	}
+	n := int64(len(p))
+	switch p[0] >> 4 {
+	case 4:
+		s.TxBytesV4.Add(n)
+	case 6:
+		s.TxBytesV6.Add(n)
+	}
 }
 
 // New creates a Stats instance initialised to the disconnected state.
@@ -32,6 +78,9 @@ func New() *Stats {
 	s := &Stats{}
 	s.state.Store(StateDisconnected)
 	s.assignedIP.Store("")
+	s.assignedIP6.Store("")
+	s.connectStep.Store("")
+	s.cidrError.Store("")
 	return s
 }
 
@@ -41,10 +90,12 @@ func (s *Stats) SetState(st State) { s.state.Store(st) }
 // State returns the current state.
 func (s *Stats) State() State { return s.state.Load().(State) }
 
-// SetConnected marks the session as connected, recording the time and IP.
-func (s *Stats) SetConnected(ip string) {
+// SetConnected marks the session as connected, recording the time and
+// assigned IP addresses. ip6 may be empty for an IPv4-only server.
+func (s *Stats) SetConnected(ip, ip6 string) {
 	s.ConnectedAt.Store(time.Now().Unix())
 	s.assignedIP.Store(ip)
+	s.assignedIP6.Store(ip6)
 	s.state.Store(StateConnected)
 }
 
@@ -52,28 +103,106 @@ func (s *Stats) SetConnected(ip string) {
 func (s *Stats) SetDisconnected() {
 	s.ConnectedAt.Store(0)
 	s.assignedIP.Store("")
+	s.assignedIP6.Store("")
 	s.state.Store(StateDisconnected)
+	s.routeLoading.Store(false)
+	s.connectStep.Store("")
+	s.cidrError.Store("")
 }
 
-// AssignedIP returns the server-assigned tunnel IP.
+// SetRouteLoading sets whether deferred routes are currently being
+// applied (e.g. thousands of CIDR bypass routes being added in the
+// background after the tunnel is up).
+func (s *Stats) SetRouteLoading(loading bool) { s.routeLoading.Store(loading) }
+
+// RouteLoading returns whether deferred routes are being applied.
+func (s *Stats) RouteLoading() bool { return s.routeLoading.Load() }
+
+// SetConnectStep sets a human-readable description of the current
+// connection step (e.g. "fetching CIDR lists"). Empty clears it.
+func (s *Stats) SetConnectStep(step string) { s.connectStep.Store(step) }
+
+// ConnectStep returns the current connection step description.
+func (s *Stats) ConnectStep() string {
+	v := s.connectStep.Load()
+	if v == nil {
+		return ""
+	}
+	return v.(string)
+}
+
+// SetCIDRError sets a CIDR fetch error message (empty = no error).
+func (s *Stats) SetCIDRError(msg string) { s.cidrError.Store(msg) }
+
+// CIDRError returns the current CIDR fetch error message.
+func (s *Stats) CIDRError() string {
+	v := s.cidrError.Load()
+	if v == nil {
+		return ""
+	}
+	return v.(string)
+}
+
+// AssignedIP returns the server-assigned tunnel IPv4.
 func (s *Stats) AssignedIP() string { return s.assignedIP.Load().(string) }
 
+// AssignedIP6 returns the server-assigned tunnel IPv6 (may be empty).
+func (s *Stats) AssignedIP6() string { return s.assignedIP6.Load().(string) }
+
 // Snapshot returns a point-in-time copy of all counters.
+//
+// Per-family byte counters are read directly. The combined RxBytes/
+// TxBytes are derived as v4+v6. Speed fields (RxSpeedV4 etc.) are
+// left zero here; the SessionManager fills them in by computing
+// per-tick deltas with EWMA smoothing.
 type Snapshot struct {
-	RxBytes     int64
-	TxBytes     int64
+	RxBytesV4 int64
+	RxBytesV6 int64
+	TxBytesV4 int64
+	TxBytesV6 int64
+	RxBytes   int64 // combined (v4+v6)
+	TxBytes   int64 // combined (v4+v6)
+
+	// Speeds in bytes/sec (EWMA-smoothed). The UI converts to bits/sec.
+	RxSpeedV4 int64
+	TxSpeedV4 int64
+	RxSpeedV6 int64
+	TxSpeedV6 int64
+	RxSpeed   int64 // combined
+	TxSpeed   int64 // combined
+
 	ConnectedAt time.Time
 	AssignedIP  string
+	AssignedIP6 string
 	State       State
 	Uptime      time.Duration
+
+	// Routing info (filled by SessionManager.reportStats).
+	RoutingMode  string `json:"routing_mode,omitempty"` // "full", "proxy", "bypass"
+	CIDRV4Total  int    `json:"cidr_v4_total,omitempty"`
+	CIDRV4Hits   int    `json:"cidr_v4_hits,omitempty"`
+	CIDRV6Total  int    `json:"cidr_v6_total,omitempty"`
+	CIDRV6Hits   int    `json:"cidr_v6_hits,omitempty"`
+	RouteLoading bool   `json:"route_loading,omitempty"` // deferred routes being applied
+	ConnectStep  string `json:"connect_step,omitempty"` // current connection step
+	CIDRError    string `json:"cidr_error,omitempty"`   // CIDR fetch error message
 }
 
 // Snapshot returns a point-in-time copy of the statistics.
 func (s *Stats) Snapshot() Snapshot {
+	rxv4 := s.RxBytesV4.Load()
+	rxv6 := s.RxBytesV6.Load()
+	txv4 := s.TxBytesV4.Load()
+	txv6 := s.TxBytesV6.Load()
 	snap := Snapshot{
-		RxBytes:    s.RxBytes.Load(),
-		TxBytes:    s.TxBytes.Load(),
+		RxBytesV4:   rxv4,
+		RxBytesV6:   rxv6,
+		TxBytesV4:   txv4,
+		TxBytesV6:   txv6,
+		RxBytes:     rxv4 + rxv6,
+		TxBytes:     txv4 + txv6,
 		AssignedIP:  s.AssignedIP(),
+		AssignedIP6: s.AssignedIP6(),
 		State:       s.State(),
 	}
 	ts := s.ConnectedAt.Load()
@@ -81,5 +210,8 @@ func (s *Stats) Snapshot() Snapshot {
 		snap.ConnectedAt = time.Unix(ts, 0)
 		snap.Uptime = time.Since(snap.ConnectedAt)
 	}
+	snap.RouteLoading = s.routeLoading.Load()
+	snap.ConnectStep = s.ConnectStep()
+	snap.CIDRError = s.CIDRError()
 	return snap
 }

internal/tlsconfig/tlsconfig.go

@@ -0,0 +1,157 @@
+// Package tlsconfig builds *tls.Config instances from user-supplied
+// verification settings (custom CA, insecure mode, certificate
+// pinning). It is shared by the WebSocket transport and the HTTP
+// login client so both paths enforce identical TLS policy.
+package tlsconfig
+
+import (
+	"bytes"
+	"crypto/sha256"
+	"crypto/tls"
+	"crypto/x509"
+	"encoding/hex"
+	"errors"
+	"fmt"
+	"os"
+	"strings"
+)
+
+// Config holds TLS verification settings for a server connection.
+type Config struct {
+	ServerName         string // TLS SNI hostname (for CDN edge IP connections)
+	CACertPEM          string // inline CA certificate PEM content
+	CACertPath         string // path to a CA certificate file
+	InsecureSkipVerify bool   // skip chain verification entirely
+	PinnedCertHash     string // SHA-256 fingerprint of the leaf cert (hex, optional "sha256:" prefix)
+}
+
+// Build creates a *tls.Config from the given settings.
+//
+// Verification behaviour matrix:
+//
+//	Pin set | Insecure | Behaviour
+//	--------+----------+-------------------------------------------
+//	  no    |   no     | Normal chain + hostname verification (Go default)
+//	  no    |   yes    | All verification skipped
+//	  yes   |   no     | Normal chain verification, then pin check
+//	  yes   |   yes    | Chain skipped, pin check only
+func Build(cfg Config) (*tls.Config, error) {
+	tlsCfg := &tls.Config{
+		ServerName: cfg.ServerName,
+	}
+
+	if cfg.CACertPEM != "" || cfg.CACertPath != "" {
+		pool, err := buildCertPool(cfg.CACertPEM, cfg.CACertPath)
+		if err != nil {
+			return nil, fmt.Errorf("load CA cert: %w", err)
+		}
+		tlsCfg.RootCAs = pool
+	}
+
+	var pin []byte
+	if cfg.PinnedCertHash != "" {
+		var err error
+		pin, err = decodePin(cfg.PinnedCertHash)
+		if err != nil {
+			return nil, fmt.Errorf("invalid pinned cert hash: %w", err)
+		}
+	}
+
+	if pin != nil {
+		if cfg.InsecureSkipVerify {
+			tlsCfg.InsecureSkipVerify = true
+		}
+		tlsCfg.VerifyPeerCertificate = func(rawCerts [][]byte, _ [][]*x509.Certificate) error {
+			return verifyPin(rawCerts, pin)
+		}
+	} else if cfg.InsecureSkipVerify {
+		tlsCfg.InsecureSkipVerify = true
+	}
+
+	return tlsCfg, nil
+}
+
+// PinMismatchError indicates the server leaf certificate does not
+// match the pinned SHA-256 fingerprint.
+type PinMismatchError struct {
+	Expected []byte
+	Got      []byte
+}
+
+func (e *PinMismatchError) Error() string {
+	return fmt.Sprintf("certificate pin mismatch: expected %x, got %x", e.Expected, e.Got)
+}
+
+// IsTLSError reports whether err represents a TLS certificate
+// verification failure that will not resolve on retry.
+func IsTLSError(err error) bool {
+	var certInvalid *x509.CertificateInvalidError
+	if errors.As(err, &certInvalid) {
+		return true
+	}
+	var hostErr *x509.HostnameError
+	if errors.As(err, &hostErr) {
+		return true
+	}
+	var unknownAuth *x509.UnknownAuthorityError
+	if errors.As(err, &unknownAuth) {
+		return true
+	}
+	var verifyErr *tls.CertificateVerificationError
+	if errors.As(err, &verifyErr) {
+		return true
+	}
+	var pinErr *PinMismatchError
+	if errors.As(err, &pinErr) {
+		return true
+	}
+	return false
+}
+
+func buildCertPool(pemData, path string) (*x509.CertPool, error) {
+	pool := x509.NewCertPool()
+
+	if pemData != "" {
+		if !pool.AppendCertsFromPEM([]byte(pemData)) {
+			return nil, errors.New("failed to parse inline CA certificate PEM")
+		}
+	}
+
+	if path != "" {
+		data, err := os.ReadFile(path)
+		if err != nil {
+			return nil, fmt.Errorf("read CA cert file %s: %w", path, err)
+		}
+		if !pool.AppendCertsFromPEM(data) {
+			return nil, errors.New("failed to parse CA certificate file")
+		}
+	}
+
+	return pool, nil
+}
+
+func decodePin(s string) ([]byte, error) {
+	s = strings.TrimSpace(s)
+	if strings.HasPrefix(s, "sha256:") {
+		s = s[len("sha256:"):]
+	}
+	pin, err := hex.DecodeString(s)
+	if err != nil {
+		return nil, fmt.Errorf("invalid hex: %w", err)
+	}
+	if len(pin) != sha256.Size {
+		return nil, fmt.Errorf("expected %d bytes, got %d", sha256.Size, len(pin))
+	}
+	return pin, nil
+}
+
+func verifyPin(rawCerts [][]byte, pin []byte) error {
+	if len(rawCerts) == 0 {
+		return errors.New("no server certificate provided")
+	}
+	h := sha256.Sum256(rawCerts[0])
+	if !bytes.Equal(h[:], pin) {
+		return &PinMismatchError{Expected: pin, Got: h[:]}
+	}
+	return nil
+}

internal/transport/transport.go

@@ -36,6 +36,7 @@ type HandshakeConfig struct {
 	Username  string                           // for password auth (method B), or fallback
 	Password  string                           // for password auth (method B), or fallback
 	OnInit    func(protocol.InitMessage) error // configure TUN; nil = auto-ready
+	TLSConfig *tls.Config                      // pre-built TLS config (nil = derive from SNIHost)
 }
 
 // Conn is an established VPN tunnel connection.
@@ -57,7 +58,9 @@ func Connect(ctx context.Context, cfg HandshakeConfig) (*Conn, error) {
 		WriteBufferSize:  4096, // match server (handler.go:18)
 	}
 
-	if cfg.SNIHost != "" {
+	if cfg.TLSConfig != nil {
+		dialer.TLSClientConfig = cfg.TLSConfig
+	} else if cfg.SNIHost != "" {
 		dialer.TLSClientConfig = &tls.Config{
 			ServerName: cfg.SNIHost,
 		}
@@ -86,12 +89,26 @@ func Connect(ctx context.Context, cfg HandshakeConfig) (*Conn, error) {
 
 	ws.SetReadLimit(protocol.MaxMessageSize)
 
+	// Watch ctx and close the WS if it is cancelled. This unblocks all
+	// ReadMessage/WriteMessage calls (they only use SetReadDeadline,
+	// not ctx). The goroutine exits when connectDone is closed (on
+	// either success or failure) to avoid leaking.
+	connectDone := make(chan struct{})
+	go func() {
+		select {
+		case <-ctx.Done():
+			ws.Close()
+		case <-connectDone:
+		}
+	}()
+
 	conn := &Conn{ws: ws}
 
 	// Step 2: authenticate (only for password mode; JWT is validated
 	// during the WS upgrade).
 	if cfg.Token == "" {
 		if err := conn.passwordAuth(cfg.Username, cfg.Password); err != nil {
+			close(connectDone)
 			ws.Close()
 			return nil, err
 		}
@@ -100,6 +117,7 @@ func Connect(ctx context.Context, cfg HandshakeConfig) (*Conn, error) {
 	// Step 3: receive init (or error/auth_err).
 	initMsg, err := conn.readInit()
 	if err != nil {
+		close(connectDone)
 		ws.Close()
 		return nil, err
 	}
@@ -108,6 +126,7 @@ func Connect(ctx context.Context, cfg HandshakeConfig) (*Conn, error) {
 	// Step 4: configure TUN via callback.
 	if cfg.OnInit != nil {
 		if err := cfg.OnInit(initMsg); err != nil {
+			close(connectDone)
 			ws.Close()
 			return nil, fmt.Errorf("tun configure: %w", err)
 		}
@@ -115,10 +134,15 @@ func Connect(ctx context.Context, cfg HandshakeConfig) (*Conn, error) {
 
 	// Step 5: send ready.
 	if err := conn.sendReady(); err != nil {
+		close(connectDone)
 		ws.Close()
 		return nil, fmt.Errorf("send ready: %w", err)
 	}
 
+	// Handshake complete - stop the ctx watcher so it doesn't close
+	// the connection after we return it to the caller.
+	close(connectDone)
+
 	// Step 6: set up keepalive — reset read deadline on each server
 	// ping, and auto-respond with pong (allowed via WriteControl in
 	// handler — see gorilla/websocket docs).
@@ -158,7 +182,7 @@ func (c *Conn) passwordAuth(username, password string) error {
 		return fmt.Errorf("parse auth response: %w", err)
 	}
 	if resp.Type == protocol.TypeAuthErr {
-		return &AuthError{Message: resp.Message}
+		return &AuthError{Message: resp.Message, Code: protocol.AuthErrorCodeFromMessage(resp.Message)}
 	}
 	if resp.Type != protocol.TypeAuthOK {
 		return fmt.Errorf("unexpected auth response type: %s", resp.Type)
@@ -186,7 +210,11 @@ func (c *Conn) readInit() (protocol.InitMessage, error) {
 		return protocol.InitMessage{}, fmt.Errorf("parse init/error: %w (raw: %s)", err, data)
 	}
 	if ctrl.Type == protocol.TypeError || ctrl.Type == protocol.TypeAuthErr {
-		return protocol.InitMessage{}, &ServerError{Type: ctrl.Type, Message: ctrl.Message}
+		return protocol.InitMessage{}, &ServerError{
+			Type:    ctrl.Type,
+			Message: ctrl.Message,
+			Code:    protocol.AuthErrorCodeFromMessage(ctrl.Message),
+		}
 	}
 	return protocol.InitMessage{}, fmt.Errorf("unexpected message type: %s", ctrl.Type)
 }
@@ -235,9 +263,12 @@ func (c *Conn) WritePacket(data []byte) error {
 // Init returns the init message received during handshake.
 func (c *Conn) Init() protocol.InitMessage { return c.init }
 
-// AssignedIP returns the IP assigned by the server.
+// AssignedIP returns the IPv4 assigned by the server.
 func (c *Conn) AssignedIP() string { return c.init.IP }
 
+// AssignedIP6 returns the IPv6 assigned by the server (empty if none).
+func (c *Conn) AssignedIP6() string { return c.init.IP6 }
+
 // Close terminates the connection.
 func (c *Conn) Close() error {
 	c.mu.Lock()
@@ -251,7 +282,10 @@ func (c *Conn) Close() error {
 }
 
 // AuthError indicates authentication failure (auth_err from server).
-type AuthError struct{ Message string }
+type AuthError struct {
+	Message string
+	Code    protocol.AuthErrorCode
+}
 
 func (e *AuthError) Error() string { return "auth failed: " + e.Message }
 
@@ -259,6 +293,7 @@ func (e *AuthError) Error() string { return "auth failed: " + e.Message }
 type ServerError struct {
 	Type    string
 	Message string
+	Code    protocol.AuthErrorCode
 }
 
 func (e *ServerError) Error() string {

internal/tun/tun.go

@@ -18,6 +18,10 @@ type Device interface {
 	Write(p []byte) (int, error)
 	// Configure sets the interface address, prefix, and peer IP.
 	Configure(localIP net.IP, prefix int, peerIP net.IP) error
+	// ConfigureIPv6 sets a secondary IPv6 address and prefix on the
+	// interface. Unlike Configure, there is no peer IP because macOS
+	// utun IPv6 does not use the point-to-point aliasing form.
+	ConfigureIPv6(localIP6 net.IP, prefix6 int) error
 	// SetMTU sets the interface MTU.
 	SetMTU(mtu int) error
 	// Close destroys the TUN device.

internal/tun/tun_darwin.go

@@ -44,6 +44,16 @@ func (d *darwinDevice) Configure(localIP net.IP, prefix int, peerIP net.IP) erro
 	return execCmd("ifconfig", d.Name(), inetType, localCidr, peerIP.String(), "up")
 }
 
+func (d *darwinDevice) ConfigureIPv6(localIP6 net.IP, prefix6 int) error {
+	if localIP6 == nil {
+		return nil
+	}
+	// macOS utun IPv6 uses the plain address form (no peer aliasing):
+	//   ifconfig utunN inet6 <ip6>/<prefix6> up
+	localCidr := fmt.Sprintf("%s/%d", localIP6.String(), prefix6)
+	return execCmd("ifconfig", d.Name(), "inet6", localCidr, "up")
+}
+
 func (d *darwinDevice) SetMTU(mtu int) error {
 	return execCmd("ifconfig", d.Name(), "mtu", fmt.Sprintf("%d", mtu))
 }

internal/tun/tun_linux.go

@@ -1,4 +1,4 @@
-//go:build !darwin
+//go:build !darwin && !windows
 
 package tun
 
@@ -46,6 +46,14 @@ func (d *linuxDevice) Configure(localIP net.IP, prefix int, peerIP net.IP) error
 	return nil
 }
 
+func (d *linuxDevice) ConfigureIPv6(localIP6 net.IP, prefix6 int) error {
+	if localIP6 == nil {
+		return nil
+	}
+	localCidr := fmt.Sprintf("%s/%d", localIP6.String(), prefix6)
+	return execCmd("ip", "-6", "addr", "add", "dev", d.Name(), localCidr)
+}
+
 func (d *linuxDevice) SetMTU(mtu int) error {
 	return execCmd("ip", "link", "set", "dev", d.Name(), "mtu", fmt.Sprintf("%d", mtu))
 }

internal/tun/tun_windows.go

@@ -0,0 +1,157 @@
+//go:build windows
+
+// Package tun — Windows implementation using WinTun.
+//
+// WinTun is a userspace TUN driver for Windows developed by the
+// WireGuard project. It requires only a single wintun.dll (MIT
+// licensed) placed next to the executable — no driver installation
+// is needed.
+//
+// The DLL is embedded at compile time via //go:embed and extracted
+// to the executable's directory on first use.
+package tun
+
+import (
+	_ "embed"
+	"fmt"
+	"net"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+
+	"golang.org/x/sys/windows"
+	"golang.zx2c4.com/wintun"
+)
+
+//go:embed wintun.dll
+var wintunDLL []byte
+
+type wintunDevice struct {
+	adapter  *wintun.Adapter
+	session  wintun.Session
+	readWait windows.Handle
+	name     string
+}
+
+func createTUN(name string) (Device, error) {
+	if err := ensureWintunDLL(); err != nil {
+		return nil, fmt.Errorf("extract wintun.dll: %w", err)
+	}
+	if name == "" {
+		name = "LMVPN"
+	}
+	adapter, err := wintun.CreateAdapter(name, "Wintun", nil)
+	if err != nil {
+		return nil, fmt.Errorf("create wintun adapter: %w", err)
+	}
+	session, err := adapter.StartSession(0x800000) // 8 MiB ring
+	if err != nil {
+		adapter.Close()
+		return nil, fmt.Errorf("start wintun session: %w", err)
+	}
+	return &wintunDevice{
+		adapter:  adapter,
+		session:  session,
+		readWait: session.ReadWaitEvent(),
+		name:     name,
+	}, nil
+}
+
+func (d *wintunDevice) Name() string                { return d.name }
+func (d *wintunDevice) Close() error                { d.session.End(); return d.adapter.Close() }
+
+func (d *wintunDevice) Read(p []byte) (int, error) {
+	for {
+		packet, err := d.session.ReceivePacket()
+		if err == nil {
+			n := copy(p, packet)
+			d.session.ReleaseReceivePacket(packet)
+			return n, nil
+		}
+		if err == windows.ERROR_NO_MORE_ITEMS {
+			windows.WaitForSingleObject(d.readWait, windows.INFINITE)
+			continue
+		}
+		if err == windows.ERROR_HANDLE_EOF {
+			return 0, fmt.Errorf("wintun closed")
+		}
+		return 0, fmt.Errorf("wintun read: %w", err)
+	}
+}
+
+func (d *wintunDevice) Write(p []byte) (int, error) {
+	buf, err := d.session.AllocateSendPacket(len(p))
+	if err != nil {
+		if err == windows.ERROR_HANDLE_EOF {
+			return 0, fmt.Errorf("wintun closed")
+		}
+		return 0, fmt.Errorf("wintun allocate: %w", err)
+	}
+	copy(buf, p)
+	d.session.SendPacket(buf)
+	return len(p), nil
+}
+
+func (d *wintunDevice) Configure(localIP net.IP, prefix int, peerIP net.IP) error {
+	if localIP == nil {
+		return execCmd("netsh", "interface", "ip", "set", "address", "name="+d.name, "source=dhcp")
+	}
+	if localIP.To4() == nil {
+		return d.configureIPv6Addr(localIP, prefix)
+	}
+	mask := net.IP(net.CIDRMask(prefix, 32))
+	return execCmd("netsh", "interface", "ip", "set", "address",
+		"name="+d.name, "source=static",
+		"addr="+localIP.String(), "mask="+mask.String())
+}
+
+func (d *wintunDevice) ConfigureIPv6(localIP6 net.IP, prefix6 int) error {
+	if localIP6 == nil {
+		return nil
+	}
+	return d.configureIPv6Addr(localIP6, prefix6)
+}
+
+func (d *wintunDevice) configureIPv6Addr(ip net.IP, prefix int) error {
+	addr := fmt.Sprintf("%s/%d", ip.String(), prefix)
+	return execCmd("netsh", "interface", "ipv6", "add", "address",
+		"interface="+d.name, "address="+addr)
+}
+
+func (d *wintunDevice) SetMTU(mtu int) error {
+	if err := execCmd("netsh", "interface", "ipv4", "set", "subinterface",
+		"name="+d.name, fmt.Sprintf("mtu=%d", mtu)); err != nil {
+		return err
+	}
+	return execCmd("netsh", "interface", "ipv6", "set", "subinterface",
+		"interface="+d.name, fmt.Sprintf("mtu=%d", mtu))
+}
+
+// ensureWintunDLL extracts the embedded wintun.dll to the executable's
+// directory if it does not already exist. The wintun Go package loads
+// the DLL via LoadLibrary which searches the exe's directory first.
+func ensureWintunDLL() error {
+	exe, err := os.Executable()
+	if err != nil {
+		return err
+	}
+	path := filepath.Join(filepath.Dir(exe), "wintun.dll")
+	if _, err := os.Stat(path); err == nil {
+		return nil
+	}
+	return os.WriteFile(path, wintunDLL, 0o644)
+}
+
+// execCmd runs a command, forwarding stdout/stderr.
+func execCmd(name string, arg ...string) error {
+	cmd := exec.Command(name, arg...)
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	if err := cmd.Run(); err != nil {
+		return fmt.Errorf("%s %s: %w", name, strings.Join(arg, " "), err)
+	}
+	return nil
+}
+
+

internal/ui/app.go

@@ -1,12 +1,14 @@
 package ui
 
 import (
+	"errors"
 	"os"
 	"sync"
 
 	"lmvpn/internal/config"
 	"lmvpn/internal/db"
 	"lmvpn/internal/i18n"
+	"lmvpn/internal/instance"
 	"lmvpn/internal/ipc"
 	"lmvpn/internal/keychain"
 	"lmvpn/internal/log"
@@ -27,13 +29,27 @@ type App struct {
 	window        fyne.Window
 	profileWindow fyne.Window
 
+	// Profile list window.
+	profileListWindow fyne.Window
+	profileList       *widget.List
+	listSelectedIndex int
+
 	// UI widgets
 	profileSelect *widget.Select
 	stateLabel    *widget.Label
 	ipLabel       *widget.Label
+	ip6Label      *widget.Label
 	uptimeLabel   *widget.Label
-	rxLabel       *widget.Label
-	txLabel       *widget.Label
+	rxV4Label     *widget.Label
+	txV4Label     *widget.Label
+	rxV6Label     *widget.Label
+	txV6Label     *widget.Label
+	rxTotalLabel  *widget.Label
+	txTotalLabel  *widget.Label
+	routingModeLabel *widget.Label
+	cidrV4Label      *widget.Label
+	cidrV6Label      *widget.Label
+	refreshCIDRBtn   *widget.Button
 	connectBtn    *widget.Button
 	disconnectBtn *widget.Button
 
@@ -42,7 +58,9 @@ type App struct {
 	ipcClient       *ipc.Client
 	profiles        []model.ServerProfile
 	currentProfile  *model.ServerProfile
+	defaultProfileID int64
 	langSetting     string
+	windowHidden    bool
 }
 
 // Run initialises and starts the GUI application.
@@ -55,6 +73,17 @@ func Run() {
 	// Logging.
 	log.Init(log.RoleGUI, paths.LogFile())
 
+	// Single-instance enforcement: the first instance holds the lock;
+	// a second instance signals "focus" to the first and exits.
+	focusCh, err := instance.Acquire()
+	if err != nil {
+		if errors.Is(err, instance.ErrAlreadyRunning) {
+			log.L().Info("another instance is running, exiting")
+			os.Exit(0)
+		}
+		log.L().Warn("instance lock failed, continuing", "error", err)
+	}
+
 	// Database.
 	store, err := db.Open()
 	if err != nil {
@@ -74,6 +103,8 @@ func Run() {
 		db:                store,
 		kc:                keychain.New(),
 		langSetting:       cfg.Language,
+		defaultProfileID:  cfg.DefaultProfileID,
+		listSelectedIndex: -1,
 	}
 
 	a.window = a.fyneApp.NewWindow(i18n.T("WindowTitle"))
@@ -88,6 +119,46 @@ func Run() {
 	// System tray.
 	a.setupTray()
 
+	// Listen for "focus" signals from second instances and bring the
+	// window to the front.
+	if focusCh != nil {
+		go func() {
+			for range focusCh {
+				fyne.Do(func() {
+					a.windowHidden = false
+					activateApp()
+					showDockIcon()
+					a.window.Show()
+					a.window.RequestFocus()
+				})
+			}
+		}()
+	}
+
+	// Register a Cocoa handler so that re-opening the .app bundle
+	// (which does NOT start a new process on macOS) brings the hidden
+	// window back.  On other platforms this is a no-op.  This must be
+	// deferred until after the Fyne/GLFW event loop has started,
+	// because GLFWApplicationDelegate is not created until glfw.Init()
+	// runs inside runGL().
+	a.fyneApp.Lifecycle().SetOnStarted(func() {
+		onAppActive = func() {
+			if a.windowHidden {
+				a.windowHidden = false
+				activateApp()
+				showDockIcon()
+				fyne.Do(func() {
+					if a.windowHidden {
+						return
+					}
+					a.window.Show()
+					a.window.RequestFocus()
+				})
+			}
+		}
+		registerReopenHandler()
+	})
+
 	// Auto-connect if configured.
 	if cfg.AutoConnect && a.currentProfile != nil {
 		go func() {
@@ -98,16 +169,30 @@ func Run() {
 
 	a.window.SetCloseIntercept(func() {
 		if cfg.CloseToTray {
+			a.windowHidden = true
 			hideDockIcon()
 			a.window.Hide()
 		} else {
-			a.fyneApp.Quit()
+			a.quit()
 		}
 	})
 
 	a.window.ShowAndRun()
 }
 
+// quit disconnects any active VPN session (via the daemon) and then
+// quits the application. The daemon process itself remains running.
+func (a *App) quit() {
+	a.mu.Lock()
+	client := a.ipcClient
+	a.ipcClient = nil
+	a.mu.Unlock()
+	if client != nil {
+		_ = ipc.SendStop(client)
+	}
+	a.fyneApp.Quit()
+}
+
 // loadProfiles loads all profiles from the database and populates the
 // selector.
 func (a *App) loadProfiles() {
@@ -120,13 +205,36 @@ func (a *App) loadProfiles() {
 	names := a.profileNames()
 	a.profileSelect.Options = names
 	if len(names) > 0 {
+		selected := false
+		if a.defaultProfileID > 0 {
+			for i := range a.profiles {
+				if a.profiles[i].ID == a.defaultProfileID {
+					a.profileSelect.SetSelectedIndex(i)
+					a.selectProfileByName(a.profiles[i].Name)
+					selected = true
+					break
+				}
+			}
+		}
+		if !selected {
 			a.profileSelect.SetSelectedIndex(0)
 			a.selectProfileByName(names[0])
+		}
 	} else {
 		a.currentProfile = nil
 		a.profileSelect.SetSelected("")
 		a.profileSelect.Refresh()
 	}
+	a.listSelectedIndex = -1
+	a.refreshProfileList()
+}
+
+// refreshProfileList refreshes the profile list widget if the profile
+// list window is currently open.
+func (a *App) refreshProfileList() {
+	if a.profileList != nil {
+		a.profileList.Refresh()
+	}
 }
 
 // profileNames returns the names of all loaded profiles.
@@ -148,44 +256,31 @@ func (a *App) selectProfileByName(name string) {
 	}
 }
 
+// saveDefaultProfile persists the currently selected profile ID to the
+// config file so it can be restored on the next launch.
+func (a *App) saveDefaultProfile() {
+	if a.currentProfile == nil {
+		return
+	}
+	a.defaultProfileID = a.currentProfile.ID
+	cfg, err := config.Load()
+	if err != nil {
+		cfg = config.Default()
+	}
+	if cfg.DefaultProfileID == a.currentProfile.ID {
+		return
+	}
+	cfg.DefaultProfileID = a.currentProfile.ID
+	if err := config.Save(cfg); err != nil {
+		log.L().Error("save default profile", "error", err)
+	}
+}
+
 // onAddProfile shows a dialog to create a new profile.
 func (a *App) onAddProfile() {
 	a.showProfileDialog(nil)
 }
 
-// onEditProfile shows a dialog to edit the current profile.
-func (a *App) onEditProfile() {
-	if a.currentProfile == nil {
-		dialog.NewCustom(i18n.T("DlgNoProfileTitle"), i18n.T("BtnOK"),
-			widget.NewLabel(i18n.T("DlgNoProfileEditMsg")), a.window).Show()
-		return
-	}
-	p := *a.currentProfile
-	a.showProfileDialog(&p)
-}
-
-// onDeleteProfile deletes the current profile after confirmation.
-func (a *App) onDeleteProfile() {
-	if a.currentProfile == nil {
-		return
-	}
-	name := a.currentProfile.Name
-	dialog.NewCustomConfirm(i18n.T("DlgDeleteProfileTitle"),
-		i18n.T("BtnDelete"), i18n.T("BtnCancel"),
-		widget.NewLabel(i18n.T("DlgDeleteProfileMsg", map[string]interface{}{"name": name})),
-		func(ok bool) {
-			if !ok {
-				return
-			}
-			if err := a.db.DeleteProfile(a.currentProfile.ID); err != nil {
-				showError(i18n.T("DlgError"), err.Error(), a.window)
-				return
-			}
-			_ = a.kc.DeleteAll(name)
-			a.loadProfiles()
-		}, a.window).Show()
-}
-
 // onResetDB deletes the SQLite database file after confirmation,
 // then re-creates it. All profiles, credentials, and logs are lost.
 func (a *App) onResetDB() {
@@ -232,11 +327,15 @@ func (a *App) onResetDB() {
 			a.loadProfiles()
 		a.stateLabel.SetText(i18n.T("StateDisconnected"))
 		a.ipLabel.SetText(i18n.T("IpNone"))
+		a.ip6Label.SetText(i18n.T("Ip6None"))
 		a.uptimeLabel.SetText(i18n.T("UptimeNone"))
-			a.rxLabel.SetText(i18n.T("RxZero"))
-			a.txLabel.SetText(i18n.T("TxZero"))
-			a.connectBtn.Enable()
-			a.disconnectBtn.Disable()
+		a.rxV4Label.SetText(i18n.T("RxV4Zero"))
+		a.txV4Label.SetText(i18n.T("TxV4Zero"))
+		a.rxV6Label.SetText(i18n.T("RxV6Zero"))
+		a.txV6Label.SetText(i18n.T("TxV6Zero"))
+		a.rxTotalLabel.SetText(i18n.T("RxTotalZero"))
+		a.txTotalLabel.SetText(i18n.T("TxTotalZero"))
+		a.setConnButtons(true, false)
 		}, a.window).Show()
 }
 
@@ -277,6 +376,12 @@ func (a *App) rebuildUI() {
 		selectedName = a.currentProfile.Name
 	}
 
+	// Close the profile list window if open; it holds cached strings
+	// and will be recreated with the new language on next open.
+	if a.profileListWindow != nil {
+		a.profileListWindow.Close()
+	}
+
 	// Rebuild window content (creates fresh widgets with new strings).
 	a.window.SetTitle(i18n.T("WindowTitle"))
 	a.window.SetContent(a.buildMainWindow())
@@ -297,12 +402,10 @@ func (a *App) rebuildUI() {
 
 	// Restore connection state.
 	if wasConnected {
-		a.connectBtn.Disable()
-		a.disconnectBtn.Enable()
+		a.setConnButtons(false, true)
 		a.stateLabel.SetText(i18n.T("StateConnected"))
 	} else {
-		a.connectBtn.Enable()
-		a.disconnectBtn.Disable()
+		a.setConnButtons(true, false)
 		a.stateLabel.SetText(i18n.T("StateDisconnected"))
 	}
 

internal/ui/daemon.go

@@ -3,13 +3,13 @@ package ui
 import (
 	"fmt"
 	"os"
-	"os/exec"
 	"path/filepath"
 	"time"
 
 	"lmvpn/internal/ipc"
 	"lmvpn/internal/log"
 	"lmvpn/internal/paths"
+	"lmvpn/internal/version"
 )
 
 // ensureDaemon checks if the daemon is running and launches it (as
@@ -25,9 +25,27 @@ import (
 // The --daemon-bin flag tells daemon-launch where to find lmvpnd. If
 // not given, daemon-launch auto-detects it relative to its own path.
 func ensureDaemon() (*ipc.Client, error) {
-	// Fast path: daemon already running.
+	// Fast path: a daemon is already running. Verify its build version
+	// matches ours; if not, it's a stale process from a previous build
+	// and must be restarted so the new code takes effect.
 	if c, err := ipc.Dial(); err == nil {
+		if ver, qerr := c.QueryVersion(); qerr == nil && ver == version.Version {
 			return c, nil
+		} else {
+			log.L().Info("stale daemon detected, restarting",
+				"got", ver, "expected", version.Version, "query_err", qerr)
+			_ = ipc.SendShutdown(c)
+			c.Close()
+			// Wait for the old daemon to exit and release the socket.
+			for i := 0; i < 30; i++ {
+				time.Sleep(100 * time.Millisecond)
+				if cc, err := ipc.Dial(); err == nil {
+					cc.Close()
+				} else {
+					break // socket gone
+				}
+			}
+		}
 	}
 
 	exe, err := os.Executable()
@@ -41,7 +59,7 @@ func ensureDaemon() (*ipc.Client, error) {
 	}
 
 	// Compute the daemon binary path: same directory as the GUI binary.
-	daemonBin := filepath.Join(filepath.Dir(exe), "lmvpnd")
+	daemonBin := filepath.Join(filepath.Dir(exe), daemonBinaryName)
 	if _, err := os.Stat(daemonBin); err != nil {
 		return nil, fmt.Errorf("daemon binary not found at %s: %w", daemonBin, err)
 	}
@@ -50,44 +68,23 @@ func ensureDaemon() (*ipc.Client, error) {
 	uid := os.Getuid()
 	gid := os.Getgid()
 
-	// Launch the daemon via osascript (prompts for admin password).
-	// The `daemon-launch` subcommand forks lmvpnd with Setsid and exits
-	// immediately, so osascript returns right away.
-	script := fmt.Sprintf(
-		`do shell script %q with administrator privileges`,
-		fmt.Sprintf("%s daemon-launch --user-home %s --uid %d --gid %d --daemon-bin %s",
-			shellQuote(exe), shellQuote(home), uid, gid, shellQuote(daemonBin)),
-	)
-	cmd := exec.Command("osascript", "-e", script)
-	if out, err := cmd.CombinedOutput(); err != nil {
-		return nil, fmt.Errorf("launch daemon: %w (output: %s)", err, string(out))
+	if err := launchElevated(exe, daemonBin, home, uid, gid); err != nil {
+		return nil, err
 	}
-	log.L().Info("daemon launched via osascript",
-		"uid", uid, "gid", gid, "home", home, "daemon_bin", daemonBin)
 
 	// Wait for the daemon to become reachable.
 	logFile := paths.DaemonLogFile()
-	for i := 0; i < 40; i++ {
+	for i := 0; i < 60; i++ {
 		time.Sleep(250 * time.Millisecond)
 		if c, err := ipc.Dial(); err == nil {
-			log.L().Info("daemon connected", "socket", paths.IPCSocketPath())
+			log.L().Info("daemon connected", "socket", paths.IPCAddress())
 			return c, nil
+		} else if i == 0 || i == 10 || i == 30 || i == 59 {
+			log.L().Warn("daemon not reachable yet, retrying",
+				"attempt", i+1, "socket", paths.IPCAddress(), "error", err)
 		}
 	}
 	return nil, fmt.Errorf("daemon did not become reachable (check %s)", logFile)
 }
 
-// shellQuote wraps a string in single quotes for shell safety.
-// Embedded single quotes are escaped using the '\'' pattern.
-func shellQuote(s string) string {
-	result := "'"
-	for _, r := range s {
-		if r == '\'' {
-			result += "'\\''"
-		} else {
-			result += string(r)
-		}
-	}
-	result += "'"
-	return result
-}
+

internal/ui/dock_callback_darwin.go

@@ -0,0 +1,18 @@
+//go:build darwin
+
+package ui
+
+import "C"
+
+// onAppActive is called from the Cocoa main thread when the app
+// becomes active (e.g. the user re-opens the .app bundle while the
+// process is still running).  It is set once in Run() before the
+// event loop starts, so no synchronisation is needed.
+var onAppActive func()
+
+//export cmAppBecameActive
+func cmAppBecameActive() {
+	if onAppActive != nil {
+		onAppActive()
+	}
+}

internal/ui/dock_darwin.go

@@ -8,13 +8,54 @@ package ui
 #include <objc/runtime.h>
 #include <objc/message.h>
 
+// Forward declaration: Go callback (defined via //export in
+// dock_callback_darwin.go).  Called when the user re-opens the .app
+// bundle while the process is still running (e.g. after closing the
+// window to tray).
+extern void cmAppBecameActive(void);
+
+// appShouldHandleReopen is the IMP added to GLFWApplicationDelegate
+// for the applicationShouldHandleReopen:hasVisibleWindows: selector.
+// This is the delegate method macOS calls when the user re-opens an
+// already-running .app bundle.  We return YES so macOS proceeds with
+// its default activation, and invoke the Go callback to show the
+// hidden window.
+static BOOL appShouldHandleReopen(id self, SEL cmd, id sender, BOOL flag) {
+    cmAppBecameActive();
+    return YES;
+}
+
 static void setDockIconVisible(int visible) {
 	Class cls = objc_getClass("NSApplication");
 	id app = ((id (*)(Class, SEL))objc_msgSend)(cls, sel_getUid("sharedApplication"));
 	((void (*)(id, SEL, long))objc_msgSend)(app, sel_getUid("setActivationPolicy:"), visible ? 0 : 1);
 }
+
+static void cmActivateApp(void) {
+	Class cls = objc_getClass("NSApplication");
+	id app = ((id (*)(Class, SEL))objc_msgSend)(cls, sel_getUid("sharedApplication"));
+	((void (*)(id, SEL, BOOL))objc_msgSend)(app, sel_getUid("activateIgnoringOtherApps:"), YES);
+}
+
+// cmRegisterReopenHandler adds applicationShouldHandleReopen:
+// hasVisibleWindows: to the GLFWApplicationDelegate class at runtime
+// (class_addMethod).  This lets us detect when macOS re-opens the
+// .app bundle without starting a new process (which bypasses our IPC
+// single-instance mechanism).  If the class already implements the
+// method, this is a no-op.
+static void cmRegisterReopenHandler(void) {
+	Class cls = objc_getClass("GLFWApplicationDelegate");
+	if (!cls) return;
+	SEL sel = sel_getUid("applicationShouldHandleReopen:hasVisibleWindows:");
+	if (class_getInstanceMethod(cls, sel)) return;
+	class_addMethod(cls, sel, (IMP)appShouldHandleReopen, "B@:@B");
+}
 */
 import "C"
 
 func showDockIcon() { C.setDockIconVisible(1) }
 func hideDockIcon() { C.setDockIconVisible(0) }
+
+func activateApp() { C.cmActivateApp() }
+
+func registerReopenHandler() { C.cmRegisterReopenHandler() }

internal/ui/dock_other.go

@@ -4,3 +4,7 @@ package ui
 
 func showDockIcon() {}
 func hideDockIcon() {}
+
+func activateApp() {}
+
+func registerReopenHandler() {}

internal/ui/elevation_darwin.go

@@ -0,0 +1,44 @@
+//go:build darwin
+
+package ui
+
+import (
+	"fmt"
+	"os/exec"
+
+	"lmvpn/internal/log"
+)
+
+const daemonBinaryName = "lmvpnd"
+
+// launchElevated launches the daemon-launch subcommand with admin
+// privileges via osascript on macOS.
+func launchElevated(exe, daemonBin, home string, uid, gid int) error {
+	script := fmt.Sprintf(
+		`do shell script %q with administrator privileges`,
+		fmt.Sprintf("%s daemon-launch --user-home %s --uid %d --gid %d --daemon-bin %s",
+			shellQuote(exe), shellQuote(home), uid, gid, shellQuote(daemonBin)),
+	)
+	cmd := exec.Command("osascript", "-e", script)
+	if out, err := cmd.CombinedOutput(); err != nil {
+		return fmt.Errorf("launch daemon: %w (output: %s)", err, string(out))
+	}
+	log.L().Info("daemon launched via osascript",
+		"uid", uid, "gid", gid, "home", home, "daemon_bin", daemonBin)
+	return nil
+}
+
+// shellQuote wraps a string in single quotes for shell safety.
+// Embedded single quotes are escaped using the '\'' pattern.
+func shellQuote(s string) string {
+	result := "'"
+	for _, r := range s {
+		if r == '\'' {
+			result += "'\\''"
+		} else {
+			result += string(r)
+		}
+	}
+	result += "'"
+	return result
+}

internal/ui/elevation_other.go

@@ -0,0 +1,28 @@
+//go:build !darwin && !windows
+
+package ui
+
+import (
+	"fmt"
+	"os/exec"
+
+	"lmvpn/internal/log"
+)
+
+const daemonBinaryName = "lmvpnd"
+
+// launchElevated launches the daemon-launch subcommand with admin
+// privileges. On Linux, pkexec is used (common on desktop Linux).
+func launchElevated(exe, daemonBin, home string, uid, gid int) error {
+	cmd := exec.Command("pkexec", exe, "daemon-launch",
+		"--user-home", home,
+		"--uid", fmt.Sprintf("%d", uid),
+		"--gid", fmt.Sprintf("%d", gid),
+		"--daemon-bin", daemonBin)
+	if out, err := cmd.CombinedOutput(); err != nil {
+		return fmt.Errorf("launch daemon: %w (output: %s)", err, string(out))
+	}
+	log.L().Info("daemon launched via pkexec",
+		"uid", uid, "gid", gid, "home", home, "daemon_bin", daemonBin)
+	return nil
+}

internal/ui/elevation_windows.go

@@ -0,0 +1,44 @@
+//go:build windows
+
+package ui
+
+import (
+	"fmt"
+	"syscall"
+	"unsafe"
+
+	"lmvpn/internal/log"
+)
+
+const daemonBinaryName = "lmvpnd.exe"
+
+// launchElevated launches the daemon-launch subcommand with UAC
+// elevation via ShellExecute "runas" on Windows.
+func launchElevated(exe, daemonBin, home string, uid, gid int) error {
+	args := fmt.Sprintf("daemon-launch --user-home \"%s\" --uid %d --gid %d --daemon-bin \"%s\"",
+		home, uid, gid, daemonBin)
+
+	shell32 := syscall.NewLazyDLL("shell32.dll")
+	proc := shell32.NewProc("ShellExecuteW")
+
+	verb, _ := syscall.UTF16PtrFromString("runas")
+	file, _ := syscall.UTF16PtrFromString(exe)
+	params, _ := syscall.UTF16PtrFromString(args)
+	dir, _ := syscall.UTF16PtrFromString("")
+
+	ret, _, err := proc.Call(
+		0,
+		uintptr(unsafe.Pointer(verb)),
+		uintptr(unsafe.Pointer(file)),
+		uintptr(unsafe.Pointer(params)),
+		uintptr(unsafe.Pointer(dir)),
+		1, // SW_SHOWNORMAL
+	)
+
+	if ret <= 32 {
+		return fmt.Errorf("UAC elevation failed (code %d): %w", ret, err)
+	}
+	log.L().Info("daemon launched via UAC",
+		"uid", uid, "gid", gid, "home", home, "daemon_bin", daemonBin)
+	return nil
+}

internal/ui/github.svg

@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16" width="24" height="24">
+  <path fill="#24292f" d="M8 0C3.58 0 0 3.58 0 8c0 3.54 2.29 6.53 5.47 7.59.4.07.55-.17.55-.38 0-.19-.01-.82-.01-1.49-2.01.37-2.53-.49-2.69-.94-.09-.23-.48-.94-.82-1.13-.28-.15-.68-.52-.01-.53.63-.01 1.08.58 1.23.82.72 1.21 1.87.87 2.33.66.07-.52.28-.87.51-1.07-1.78-.2-3.64-.89-3.64-3.95 0-.87.31-1.59.82-2.15-.08-.2-.36-1.02.08-2.12 0 0 .67-.21 2.2.82.64-.18 1.32-.27 2-.27.68 0 1.36.09 2 .27 1.53-1.04 2.2-.82 2.2-.82.44 1.1.16 1.92.08 2.12.51.56.82 1.27.82 2.15 0 3.07-1.87 3.75-3.65 3.95.29.25.54.73.54 1.48 0 1.07-.01 1.93-.01 2.2 0 .21.15.46.55.38A8.012 8.012 0 0 0 16 8c0-4.42-3.58-8-8-8z"/>
+</svg>

internal/ui/profile.go

@@ -1,13 +1,17 @@
 package ui
 
 import (
+	"encoding/json"
+	"fmt"
 	"strconv"
+	"strings"
 
 	"lmvpn/internal/i18n"
 	"lmvpn/internal/model"
 
 	"fyne.io/fyne/v2"
 	"fyne.io/fyne/v2/container"
+	"fyne.io/fyne/v2/dialog"
 	"fyne.io/fyne/v2/widget"
 )
 
@@ -16,9 +20,11 @@ import (
 // mapped back to the codes stored in the database.
 var (
 	authCodes  = []string{string(model.AuthModeBoth), string(model.AuthModeJWT), string(model.AuthModePassword)}
-	routeCodes = []string{string(model.RoutingFull), string(model.RoutingSplit), string(model.RoutingCustom)}
+	routeCodes = []string{string(model.RoutingFull), string(model.RoutingProxy), string(model.RoutingBypass)}
 
 	protoCodes = []string{"wss", "ws"}
+
+	fetchTimingCodes = []string{string(model.FetchBefore), string(model.FetchAfter)}
 )
 
 func authModeLabels() []string {
@@ -26,13 +32,17 @@ func authModeLabels() []string {
 }
 
 func routeModeLabels() []string {
-	return []string{i18n.T("RoutingModeFull"), i18n.T("RoutingModeSplit"), i18n.T("RoutingModeCustom")}
+	return []string{i18n.T("RoutingModeFull"), i18n.T("RoutingModeProxy"), i18n.T("RoutingModeBypass")}
 }
 
 func protoLabels() []string {
 	return []string{"wss", "ws"}
 }
 
+func fetchTimingLabels() []string {
+	return []string{i18n.T("FetchTimingBefore"), i18n.T("FetchTimingAfter")}
+}
+
 // codeIndex returns the position of code in codes, or 0 if not found.
 func codeIndex(codes []string, code string) int {
 	for i, c := range codes {
@@ -51,6 +61,100 @@ func selectedCode(codes []string, idx int) string {
 	return codes[idx]
 }
 
+// urlEntryRow holds the widgets for a single CIDR URL source row.
+type urlEntryRow struct {
+	urlEntry    *widget.Entry
+	timingSelect *widget.Select
+	container   *fyne.Container
+}
+
+// cidrURLList manages a dynamic list of CIDR URL source rows.
+type cidrURLList struct {
+	rows   []*urlEntryRow
+	container *fyne.Container
+	parent    fyne.Window
+}
+
+func newCIDRURLList(parent fyne.Window) *cidrURLList {
+	cl := &cidrURLList{
+		container: container.NewVBox(),
+		parent:    parent,
+	}
+	return cl
+}
+
+func (cl *cidrURLList) addRow(url string, timingIdx int) {
+	urlEntry := widget.NewEntry()
+	urlEntry.Wrapping = fyne.TextWrapOff
+	urlEntry.Scroll = container.ScrollHorizontalOnly
+	urlEntry.SetPlaceHolder(i18n.T("PlaceholderCIDRURL"))
+	urlEntry.SetText(url)
+
+	timingSelect := widget.NewSelect(fetchTimingLabels(), nil)
+	if timingIdx >= 0 && timingIdx < len(fetchTimingCodes) {
+		timingSelect.SetSelectedIndex(timingIdx)
+	} else {
+		timingSelect.SetSelectedIndex(0)
+	}
+
+	row := &urlEntryRow{
+		urlEntry:     urlEntry,
+		timingSelect: timingSelect,
+	}
+
+	removeBtn := widget.NewButton(i18n.T("BtnRemoveURL"), func() {
+		cl.removeRow(row)
+	})
+
+	row.container = container.NewBorder(nil, nil, nil, removeBtn,
+		container.NewVBox(urlEntry, timingSelect))
+
+	cl.rows = append(cl.rows, row)
+	cl.container.Add(row.container)
+}
+
+func (cl *cidrURLList) removeRow(row *urlEntryRow) {
+	for i, r := range cl.rows {
+		if r == row {
+			cl.rows = append(cl.rows[:i], cl.rows[i+1:]...)
+			cl.container.Remove(row.container)
+			break
+		}
+	}
+}
+
+func (cl *cidrURLList) loadFromJSON(jsonStr string) {
+	for _, r := range cl.rows {
+		cl.container.Remove(r.container)
+	}
+	cl.rows = nil
+
+	sources := model.ParseCIDRURLs(jsonStr)
+	for _, s := range sources {
+		timingIdx := codeIndex(fetchTimingCodes, string(s.FetchTiming))
+		cl.addRow(s.URL, timingIdx)
+	}
+}
+
+func (cl *cidrURLList) toSources() []model.CIDRURLSource {
+	var sources []model.CIDRURLSource
+	for _, r := range cl.rows {
+		url := strings.TrimSpace(r.urlEntry.Text)
+		if url == "" {
+			continue
+		}
+		sources = append(sources, model.CIDRURLSource{
+			URL:         url,
+			FetchTiming: model.FetchTiming(selectedCode(fetchTimingCodes, r.timingSelect.SelectedIndex())),
+		})
+	}
+	return sources
+}
+
+func (cl *cidrURLList) toJSON() string {
+	return marshalCIDRURLs(cl.toSources())
+}
+
 // showProfileDialog opens a separate window for editing a server profile.
 // If editing is nil, a new profile is created. If a profile window is
 // already open, it is brought to the front instead of opening a second one.
@@ -95,17 +199,95 @@ func (a *App) showProfileDialog(editing *model.ServerProfile) {
 	authSelect := widget.NewSelect(authModeLabels(), nil)
 	routeSelect := widget.NewSelect(routeModeLabels(), nil)
 
-	cidrEntry := widget.NewMultiLineEntry()
-	cidrEntry.Wrapping = fyne.TextWrapOff
-	cidrEntry.Scroll = container.ScrollNone
-	cidrEntry.SetMinRowsVisible(4)
-	cidrEntry.SetPlaceHolder(i18n.T("PlaceholderCIDRs"))
+	cidrV4Entry := widget.NewMultiLineEntry()
+	cidrV4Entry.Wrapping = fyne.TextWrapOff
+	cidrV4Entry.Scroll = container.ScrollNone
+	cidrV4Entry.SetMinRowsVisible(3)
+	cidrV4Entry.SetPlaceHolder(i18n.T("PlaceholderCIDRV4"))
+
+	cidrV6Entry := widget.NewMultiLineEntry()
+	cidrV6Entry.Wrapping = fyne.TextWrapOff
+	cidrV6Entry.Scroll = container.ScrollNone
+	cidrV6Entry.SetMinRowsVisible(3)
+	cidrV6Entry.SetPlaceHolder(i18n.T("PlaceholderCIDRV6"))
 
 	mtuEntry := widget.NewEntry()
 	mtuEntry.Wrapping = fyne.TextWrapOff
 	mtuEntry.Scroll = container.ScrollNone
 	mtuEntry.SetPlaceHolder(i18n.T("PlaceholderMTU"))
 
+	tlsCaPEMEntry := widget.NewMultiLineEntry()
+	tlsCaPEMEntry.Wrapping = fyne.TextWrapOff
+	tlsCaPEMEntry.Scroll = container.ScrollNone
+	tlsCaPEMEntry.SetMinRowsVisible(4)
+	tlsCaPEMEntry.SetPlaceHolder(i18n.T("PlaceholderTLSCACert"))
+
+	tlsCaPathEntry := widget.NewEntry()
+	tlsCaPathEntry.Wrapping = fyne.TextWrapOff
+	tlsCaPathEntry.Scroll = container.ScrollNone
+	tlsCaPathEntry.SetPlaceHolder(i18n.T("PlaceholderTLSCAPath"))
+
+	tlsInsecureCheck := widget.NewCheck(i18n.T("FieldTLSInsecure"), nil)
+
+	tlsPinnedHashEntry := widget.NewEntry()
+	tlsPinnedHashEntry.Wrapping = fyne.TextWrapOff
+	tlsPinnedHashEntry.Scroll = container.ScrollNone
+	tlsPinnedHashEntry.SetPlaceHolder(i18n.T("PlaceholderTLSPinnedHash"))
+
+	var profileWin fyne.Window
+
+	browseBtn := widget.NewButton(i18n.T("BtnBrowse"), func() {
+		dialog.NewFileOpen(func(reader fyne.URIReadCloser, err error) {
+			if err != nil || reader == nil {
+				return
+			}
+			defer reader.Close()
+			tlsCaPathEntry.SetText(reader.URI().Path())
+		}, profileWin).Show()
+	})
+
+	setTLSEnabled := func(enabled bool) {
+		if enabled {
+			tlsCaPEMEntry.Enable()
+			tlsCaPathEntry.Enable()
+			browseBtn.Enable()
+			tlsInsecureCheck.Enable()
+			tlsPinnedHashEntry.Enable()
+		} else {
+			tlsCaPEMEntry.Disable()
+			tlsCaPathEntry.Disable()
+			browseBtn.Disable()
+			tlsInsecureCheck.Disable()
+			tlsPinnedHashEntry.Disable()
+		}
+	}
+
+	// CIDR URL lists for IPv4 and IPv6.
+	v4URLList := newCIDRURLList(profileWin)
+	v6URLList := newCIDRURLList(profileWin)
+
+	v4AddURLBtn := widget.NewButton(i18n.T("BtnAddURL"), func() {
+		v4URLList.addRow("", 0)
+	})
+	v6AddURLBtn := widget.NewButton(i18n.T("BtnAddURL"), func() {
+		v6URLList.addRow("", 0)
+	})
+
+	// CIDR section visibility: hide when routing mode is "full".
+	cidrV4EntryBox := container.NewVBox(widget.NewLabel(i18n.T("FieldCIDRV4")), cidrV4Entry)
+	cidrV6EntryBox := container.NewVBox(widget.NewLabel(i18n.T("FieldCIDRV6")), cidrV6Entry)
+	v4URLBox := container.NewVBox(widget.NewLabel(i18n.T("FieldCIDRV4URLs")), v4URLList.container, v4AddURLBtn)
+	v6URLBox := container.NewVBox(widget.NewLabel(i18n.T("FieldCIDRV6URLs")), v6URLList.container, v6AddURLBtn)
+	cidrSection := container.NewVBox(cidrV4EntryBox, cidrV6EntryBox, v4URLBox, v6URLBox)
+
+	setCIDRVisible := func(mode string) {
+		if mode == string(model.RoutingFull) {
+			cidrSection.Hide()
+		} else {
+			cidrSection.Show()
+		}
+	}
+
 	if !isNew {
 		nameEntry.SetText(editing.Name)
 		protoSelect.SetSelectedIndex(codeIndex(protoCodes, editing.Protocol))
@@ -118,8 +300,15 @@ func (a *App) showProfileDialog(editing *model.ServerProfile) {
 		userEntry.SetText(editing.Username)
 		authSelect.SetSelectedIndex(codeIndex(authCodes, string(editing.AuthMode)))
 		routeSelect.SetSelectedIndex(codeIndex(routeCodes, string(editing.RoutingMode)))
-		cidrEntry.SetText(editing.CustomCIDRs)
+		cidrV4Entry.SetText(editing.CIDRV4)
+		cidrV6Entry.SetText(editing.CIDRV6)
+		v4URLList.loadFromJSON(editing.CIDRV4URLs)
+		v6URLList.loadFromJSON(editing.CIDRV6URLs)
 		mtuEntry.SetText(fmtInt(editing.MTUOverride))
+		tlsCaPEMEntry.SetText(editing.TLSCACert)
+		tlsCaPathEntry.SetText(editing.TLSCAPath)
+		tlsInsecureCheck.SetChecked(editing.TLSInsecure)
+		tlsPinnedHashEntry.SetText(editing.TLSPinnedHash)
 		passEntry.SetPlaceHolder(i18n.T("PlaceholderPasswordUnchanged"))
 	} else {
 		protoSelect.SetSelectedIndex(0) // wss
@@ -130,6 +319,16 @@ func (a *App) showProfileDialog(editing *model.ServerProfile) {
 		mtuEntry.SetText("0")
 	}
 
+	protoSelect.OnChanged = func(value string) {
+		setTLSEnabled(value == "wss")
+	}
+	setTLSEnabled(selectedCode(protoCodes, protoSelect.SelectedIndex()) == "wss")
+
+	routeSelect.OnChanged = func(_ string) {
+		setCIDRVisible(selectedCode(routeCodes, routeSelect.SelectedIndex()))
+	}
+	setCIDRVisible(selectedCode(routeCodes, routeSelect.SelectedIndex()))
+
 	form := container.NewVBox(
 		widget.NewLabel(i18n.T("FieldName")),
 		nameEntry,
@@ -155,13 +354,28 @@ func (a *App) showProfileDialog(editing *model.ServerProfile) {
 			container.NewVBox(widget.NewLabel(i18n.T("FieldRoutingMode")), routeSelect),
 		),
 
-		widget.NewLabel(i18n.T("FieldCustomCIDRs")), cidrEntry,
+		cidrSection,
+
 		widget.NewLabel(i18n.T("FieldMTUOverride")), mtuEntry,
+
+		widget.NewLabel(i18n.T("FieldTLS")),
+		widget.NewLabel(i18n.T("FieldTLSCAPath")),
+		container.NewBorder(nil, nil, nil, browseBtn, tlsCaPathEntry),
+		widget.NewLabel(i18n.T("FieldTLSCACert")),
+		tlsCaPEMEntry,
+		widget.NewLabel(i18n.T("HintTLSCAReplacesSystem")),
+		tlsInsecureCheck,
+		widget.NewLabel(i18n.T("FieldTLSPinnedHash")),
+		tlsPinnedHashEntry,
 	)
 
-	profileWin := a.fyneApp.NewWindow(i18n.T("DlgProfileTitle"))
+	profileWin = a.fyneApp.NewWindow(i18n.T("DlgProfileTitle"))
 	a.profileWindow = profileWin
 
+	// Update parent references now that the window exists.
+	v4URLList.parent = profileWin
+	v6URLList.parent = profileWin
+
 	profileWin.SetOnClosed(func() {
 		a.profileWindow = nil
 	})
@@ -175,7 +389,12 @@ func (a *App) showProfileDialog(editing *model.ServerProfile) {
 			userEntry.Text, passEntry.Text,
 			selectedCode(authCodes, authSelect.SelectedIndex()),
 			selectedCode(routeCodes, routeSelect.SelectedIndex()),
-			cidrEntry.Text, mtuEntry.Text, isNew) {
+			cidrV4Entry.Text, cidrV6Entry.Text,
+			v4URLList.toJSON(), v6URLList.toJSON(),
+			mtuEntry.Text,
+			tlsCaPEMEntry.Text, tlsCaPathEntry.Text,
+			tlsPinnedHashEntry.Text, tlsInsecureCheck.Checked,
+			isNew) {
 			profileWin.Close()
 		}
 	})
@@ -186,19 +405,32 @@ func (a *App) showProfileDialog(editing *model.ServerProfile) {
 	})
 
 	profileWin.SetContent(container.NewBorder(nil, container.NewHBox(saveBtn, cancelBtn), nil, nil, container.NewVScroll(form)))
-	profileWin.Resize(fyne.NewSize(460, 560))
+	profileWin.Resize(fyne.NewSize(460, 860))
 	profileWin.Show()
 }
 
 // saveProfile creates or updates a profile and stores credentials.
 // Returns true on success, false if validation or DB operation failed.
 func (a *App) saveProfile(editing *model.ServerProfile,
-	name, protocol, host, ips, portStr, pathStr, user, password, authMode, routeMode, cidrs, mtuStr string, isNew bool) bool {
+	name, protocol, host, ips, portStr, pathStr, user, password, authMode, routeMode,
+	cidrV4, cidrV6, cidrV4URLs, cidrV6URLs, mtuStr,
+	tlsCaPEM, tlsCaPath, tlsPinnedHash string, tlsInsecure, isNew bool) bool {
 	if name == "" || host == "" || user == "" {
 		showError(i18n.T("DlgValidationTitle"), i18n.T("DlgValidationMsg"), a.window)
 		return false
 	}
 
+	if ips != "" {
+		tmp := &model.ServerProfile{ServerIPs: ips}
+		_, invalid := tmp.ValidateServerIPs()
+		if len(invalid) > 0 {
+			showError(i18n.T("DlgValidationTitle"),
+				fmt.Sprintf(i18n.T("DlgInvalidIPMsg"), strings.Join(invalid, ", ")),
+				a.window)
+			return false
+		}
+	}
+
 	port := parseIntDefault(portStr, 443)
 	mtu := parseIntDefault(mtuStr, 0)
 
@@ -213,8 +445,15 @@ func (a *App) saveProfile(editing *model.ServerProfile,
 			Username:      user,
 			AuthMode:      model.AuthMode(authMode),
 			RoutingMode:   model.RoutingMode(routeMode),
-			CustomCIDRs: cidrs,
+			CIDRV4:        cidrV4,
+			CIDRV6:        cidrV6,
+			CIDRV4URLs:    cidrV4URLs,
+			CIDRV6URLs:    cidrV6URLs,
 			MTUOverride:   mtu,
+			TLSCACert:     tlsCaPEM,
+			TLSCAPath:     tlsCaPath,
+			TLSInsecure:   tlsInsecure,
+			TLSPinnedHash: tlsPinnedHash,
 		}
 		id, err := a.db.CreateProfile(p)
 		if err != nil {
@@ -238,8 +477,15 @@ func (a *App) saveProfile(editing *model.ServerProfile,
 		editing.Username = user
 		editing.AuthMode = model.AuthMode(authMode)
 		editing.RoutingMode = model.RoutingMode(routeMode)
-		editing.CustomCIDRs = cidrs
+		editing.CIDRV4 = cidrV4
+		editing.CIDRV6 = cidrV6
+		editing.CIDRV4URLs = cidrV4URLs
+		editing.CIDRV6URLs = cidrV6URLs
 		editing.MTUOverride = mtu
+		editing.TLSCACert = tlsCaPEM
+		editing.TLSCAPath = tlsCaPath
+		editing.TLSInsecure = tlsInsecure
+		editing.TLSPinnedHash = tlsPinnedHash
 		if err := a.db.UpdateProfile(editing); err != nil {
 			showError(i18n.T("DlgSaveError"), err.Error(), a.window)
 			return false
@@ -256,6 +502,16 @@ func (a *App) saveProfile(editing *model.ServerProfile,
 	return true
 }
 
+// marshalCIDRURLsForDB is a helper for tests/debugging that encodes
+// CIDRURLSource slice to JSON.
+func marshalCIDRURLsForDB(sources []model.CIDRURLSource) string {
+	data, err := json.Marshal(sources)
+	if err != nil {
+		return ""
+	}
+	return string(data)
+}
+
 func fmtInt(n int) string {
 	return strconv.Itoa(n)
 }
@@ -267,3 +523,97 @@ func parseIntDefault(s string, def int) int {
 	}
 	return n
 }
+
+// showProfileListWindow opens a window listing all saved profiles with
+// buttons to add, edit, delete, and reset the database. Only one
+// instance is allowed; if already open it is brought to the front.
+func (a *App) showProfileListWindow() {
+	if a.profileListWindow != nil {
+		a.profileListWindow.RequestFocus()
+		return
+	}
+
+	a.profileList = widget.NewList(
+		func() int { return len(a.profiles) },
+		func() fyne.CanvasObject {
+			name := widget.NewLabel("")
+			name.TextStyle = fyne.TextStyle{Bold: true}
+			host := widget.NewLabel("")
+			return container.NewVBox(name, host)
+		},
+		func(id widget.ListItemID, obj fyne.CanvasObject) {
+			box := obj.(*fyne.Container)
+			nameLbl := box.Objects[0].(*widget.Label)
+			hostLbl := box.Objects[1].(*widget.Label)
+			if id >= 0 && id < len(a.profiles) {
+				p := a.profiles[id]
+				nameLbl.SetText(p.Name)
+				hostLbl.SetText(fmt.Sprintf("%s:%d", p.Host, p.Port))
+			}
+		},
+	)
+	a.profileList.OnSelected = func(id widget.ListItemID) {
+		a.listSelectedIndex = id
+	}
+	a.profileList.OnUnselected = func(_ widget.ListItemID) {
+		a.listSelectedIndex = -1
+	}
+
+	addBtn := widget.NewButton(i18n.T("BtnAddProfile"), a.onAddProfile)
+	editBtn := widget.NewButton(i18n.T("BtnEdit"), a.onEditProfileFromList)
+	deleteBtn := widget.NewButton(i18n.T("BtnDelete"), a.onDeleteProfileFromList)
+	resetDBBtn := widget.NewButton(i18n.T("BtnResetDB"), a.onResetDB)
+
+	buttons := container.NewGridWithColumns(4, addBtn, editBtn, deleteBtn, resetDBBtn)
+
+	win := a.fyneApp.NewWindow(i18n.T("ProfileListTitle"))
+	a.profileListWindow = win
+	win.SetOnClosed(func() {
+		a.profileListWindow = nil
+		a.profileList = nil
+		a.listSelectedIndex = -1
+	})
+
+	win.SetContent(container.NewBorder(nil, buttons, nil, nil, a.profileList))
+	win.Resize(fyne.NewSize(460, 400))
+	win.Show()
+}
+
+// onEditProfileFromList opens the profile editor for the profile
+// selected in the list window.
+func (a *App) onEditProfileFromList() {
+	idx := a.listSelectedIndex
+	if idx < 0 || idx >= len(a.profiles) {
+		dialog.NewCustom(i18n.T("DlgNoListSelectTitle"), i18n.T("BtnOK"),
+			widget.NewLabel(i18n.T("DlgNoListSelectEditMsg")), a.profileListWindow).Show()
+		return
+	}
+	p := a.profiles[idx]
+	a.showProfileDialog(&p)
+}
+
+// onDeleteProfileFromList deletes the profile selected in the list
+// window after confirmation.
+func (a *App) onDeleteProfileFromList() {
+	idx := a.listSelectedIndex
+	if idx < 0 || idx >= len(a.profiles) {
+		dialog.NewCustom(i18n.T("DlgNoListSelectTitle"), i18n.T("BtnOK"),
+			widget.NewLabel(i18n.T("DlgNoListSelectDeleteMsg")), a.profileListWindow).Show()
+		return
+	}
+	p := a.profiles[idx]
+	dialog.NewCustomConfirm(i18n.T("DlgDeleteProfileTitle"),
+		i18n.T("BtnDelete"), i18n.T("BtnCancel"),
+		widget.NewLabel(i18n.T("DlgDeleteProfileMsg", map[string]interface{}{"name": p.Name})),
+		func(ok bool) {
+			if !ok {
+				return
+			}
+			if err := a.db.DeleteProfile(p.ID); err != nil {
+				showError(i18n.T("DlgError"), err.Error(), a.profileListWindow)
+				return
+			}
+			_ = a.kc.DeleteAll(p.Name)
+			a.loadProfiles()
+		}, a.profileListWindow).Show()
+}

internal/ui/tray.go

@@ -46,24 +46,35 @@ func (a *App) setupTray() {
 		autoItem, enItem, zhItem,
 	)
 
+		connectItem := fyne.NewMenuItem(i18n.T("TrayConnect"), func() {
+			a.onConnect()
+		})
+		disconnectItem := fyne.NewMenuItem(i18n.T("TrayDisconnect"), func() {
+			a.onDisconnect()
+		})
+		if a.connectBtn != nil {
+			connectItem.Disabled = a.connectBtn.Disabled()
+		}
+		if a.disconnectBtn != nil {
+			disconnectItem.Disabled = a.disconnectBtn.Disabled()
+		}
+
 		menu := fyne.NewMenu(i18n.T("WindowTitle"),
 		fyne.NewMenuItem(i18n.T("TrayShowWindow"), func() {
+			a.windowHidden = false
+			activateApp()
 			showDockIcon()
 			a.window.Show()
 			a.window.RequestFocus()
 		}),
 			fyne.NewMenuItemSeparator(),
-		fyne.NewMenuItem(i18n.T("TrayConnect"), func() {
-			a.onConnect()
-		}),
-		fyne.NewMenuItem(i18n.T("TrayDisconnect"), func() {
-			a.onDisconnect()
-		}),
+			connectItem,
+			disconnectItem,
 		fyne.NewMenuItemSeparator(),
 		langItem,
 		fyne.NewMenuItemSeparator(),
 		fyne.NewMenuItem(i18n.T("TrayQuit"), func() {
-			a.fyneApp.Quit()
+			a.quit()
 		}),
 	)
 	deskApp.SetSystemTrayMenu(menu)

internal/ui/version.go

@@ -1,3 +1,7 @@
 package ui
 
-var Version = "dev"
+import "lmvpn/internal/version"
+
+// Version is the application version, sourced from the shared version
+// package so the GUI and daemon report the same string.
+var Version = version.Version

internal/ui/view.go

@@ -1,44 +1,98 @@
 package ui
 
 import (
+	_ "embed"
+	"encoding/json"
 	"fmt"
+	"net/url"
 	"time"
 
 	"lmvpn/internal/i18n"
 	"lmvpn/internal/ipc"
+	"lmvpn/internal/model"
 	"lmvpn/internal/stats"
 
 	"fyne.io/fyne/v2"
 	"fyne.io/fyne/v2/container"
 	"fyne.io/fyne/v2/dialog"
+	"fyne.io/fyne/v2/layout"
+	"fyne.io/fyne/v2/theme"
 	"fyne.io/fyne/v2/widget"
 )
 
+//go:embed github.svg
+var githubIconBytes []byte
+
 // showError displays a titled error dialog.
 func showError(title, message string, parent fyne.Window) {
 	dialog.NewCustom(title, i18n.T("BtnOK"), widget.NewLabel(message), parent).Show()
 }
 
+// setConnButtons enables/disables the connect and disconnect buttons
+// and refreshes the tray menu to match.
+func (a *App) setConnButtons(connectEnabled, disconnectEnabled bool) {
+	if connectEnabled {
+		a.connectBtn.Enable()
+	} else {
+		a.connectBtn.Disable()
+	}
+	if disconnectEnabled {
+		a.disconnectBtn.Enable()
+	} else {
+		a.disconnectBtn.Disable()
+	}
+	if a.profileSelect != nil {
+		if connectEnabled {
+			a.profileSelect.Enable()
+		} else {
+			a.profileSelect.Disable()
+		}
+	}
+	a.setupTray()
+}
+
 // buildMainWindow creates the main application window layout.
 func (a *App) buildMainWindow() fyne.CanvasObject {
 	// Profile selector.
 	a.profileSelect = widget.NewSelect(a.profileNames(), func(sel string) {
 		a.selectProfileByName(sel)
+		a.saveDefaultProfile()
 	})
 
 	// Status display.
 	a.stateLabel = widget.NewLabel(i18n.T("StateDisconnected"))
 	a.stateLabel.TextStyle = fyne.TextStyle{Bold: true}
 	a.ipLabel = widget.NewLabel(i18n.T("IpNone"))
+	a.ip6Label = widget.NewLabel(i18n.T("Ip6None"))
 	a.uptimeLabel = widget.NewLabel(i18n.T("UptimeNone"))
-	a.rxLabel = widget.NewLabel(i18n.T("RxZero"))
-	a.txLabel = widget.NewLabel(i18n.T("TxZero"))
+	a.rxV4Label = widget.NewLabel(i18n.T("RxV4Zero"))
+	a.txV4Label = widget.NewLabel(i18n.T("TxV4Zero"))
+	a.rxV6Label = widget.NewLabel(i18n.T("RxV6Zero"))
+	a.txV6Label = widget.NewLabel(i18n.T("TxV6Zero"))
+	a.rxTotalLabel = widget.NewLabel(i18n.T("RxTotalZero"))
+	a.txTotalLabel = widget.NewLabel(i18n.T("TxTotalZero"))
+	a.routingModeLabel = widget.NewLabel("")
+	a.routingModeLabel.Hide()
+	a.cidrV4Label = widget.NewLabel("")
+	a.cidrV4Label.Hide()
+	a.cidrV6Label = widget.NewLabel("")
+	a.cidrV6Label.Hide()
+
+	a.refreshCIDRBtn = widget.NewButton(i18n.T("BtnRefreshCIDR"), a.onRefreshCIDR)
+	a.refreshCIDRBtn.Hide()
 
 	statusCard := widget.NewCard(i18n.T("StatusLabel"), "", container.NewVBox(
 		a.stateLabel,
 		a.ipLabel,
+		a.ip6Label,
 		a.uptimeLabel,
-		container.NewHBox(a.rxLabel, a.txLabel),
+		container.NewHBox(a.rxV4Label, a.txV4Label),
+		container.NewHBox(a.rxV6Label, a.txV6Label),
+		container.NewHBox(a.rxTotalLabel, a.txTotalLabel),
+		a.routingModeLabel,
+		a.cidrV4Label,
+		a.cidrV6Label,
+		a.refreshCIDRBtn,
 	))
 
 	// Buttons.
@@ -47,28 +101,35 @@ func (a *App) buildMainWindow() fyne.CanvasObject {
 	a.disconnectBtn = widget.NewButton(i18n.T("BtnDisconnect"), a.onDisconnect)
 	a.disconnectBtn.Disable()
 
-	addBtn := widget.NewButton(i18n.T("BtnAddProfile"), a.onAddProfile)
-	editBtn := widget.NewButton(i18n.T("BtnEdit"), a.onEditProfile)
-	deleteBtn := widget.NewButton(i18n.T("BtnDelete"), a.onDeleteProfile)
-
-	resetDBBtn := widget.NewButton(i18n.T("BtnResetDB"), a.onResetDB)
+	profileListBtn := widget.NewButton(i18n.T("BtnProfileList"), a.showProfileListWindow)
 
 	buttons := container.NewGridWithColumns(2,
 		a.connectBtn, a.disconnectBtn,
 	)
-	profileButtons := container.NewGridWithColumns(3,
-		addBtn, editBtn, deleteBtn,
-	)
 
-	return container.NewVBox(
+	githubBtn := widget.NewButtonWithIcon("", theme.NewThemedResource(fyne.NewStaticResource("github.svg", githubIconBytes)), func() {
+		u, err := url.Parse("https://github.com/wuwenfengmi1998/lmvpn_client")
+		if err != nil {
+			return
+		}
+		_ = a.fyneApp.OpenURL(u)
+	})
+
+	content := container.NewVBox(
 		widget.NewLabel(i18n.T("ProfileLabel")),
 		a.profileSelect,
 		buttons,
-		profileButtons,
-		resetDBBtn,
+		profileListBtn,
 		statusCard,
-		widget.NewLabel(fmt.Sprintf("v%s", Version)),
 	)
+
+	bottomBar := container.NewHBox(
+		widget.NewLabel(fmt.Sprintf("v%s", Version)),
+		layout.NewSpacer(),
+		githubBtn,
+	)
+
+	return container.NewBorder(nil, bottomBar, nil, nil, content)
 }
 
 // onConnect handles the Connect button click.
@@ -78,8 +139,7 @@ func (a *App) onConnect() {
 		return
 	}
 
-	a.connectBtn.Disable()
-	a.disconnectBtn.Enable()
+	a.setConnButtons(false, true)
 	a.stateLabel.SetText(i18n.T("StateConnecting"))
 
 	go func() {
@@ -89,15 +149,24 @@ func (a *App) onConnect() {
 			fyne.Do(func() {
 				showError(i18n.T("DlgDaemonError"), err.Error(), a.window)
 				a.stateLabel.SetText(i18n.T("StateDisconnected"))
-				a.connectBtn.Enable()
-				a.disconnectBtn.Disable()
+				a.setConnButtons(true, false)
 			})
 			return
 		}
 
 		a.mu.Lock()
+		oldClient := a.ipcClient
 		a.ipcClient = client
 		a.mu.Unlock()
+		if oldClient != nil {
+			// Do NOT send SendStop on the old connection. The daemon's
+			// startSession already calls stopSessionLocked() which
+			// tears down any existing session. Sending SendStop here
+			// races with SendStart on the new connection - the daemon
+			// processes each IPC connection in a separate goroutine,
+			// so a late SendStop could kill the newly started session.
+			oldClient.Close()
+		}
 
 		// Get password from keychain.
 		password, err := a.kc.GetPassword(a.currentProfile.Name)
@@ -107,8 +176,7 @@ func (a *App) onConnect() {
 					i18n.T("DlgCredentialErrorMsg"),
 					a.window)
 				a.stateLabel.SetText(i18n.T("StateDisconnected"))
-				a.connectBtn.Enable()
-				a.disconnectBtn.Disable()
+				a.setConnButtons(true, false)
 			})
 			return
 		}
@@ -130,15 +198,21 @@ func (a *App) onConnect() {
 			Password:      password,
 			AuthMode:      string(p.AuthMode),
 			RoutingMode:   string(p.RoutingMode),
-			CustomCIDRs: splitCIDRs(p.CustomCIDRs),
+			CIDRV4:        model.SplitCIDRs(p.CIDRV4),
+			CIDRV6:        model.SplitCIDRs(p.CIDRV6),
+			CIDRV4URLs:    parseIPCCIDRURLs(p.CIDRV4URLs),
+			CIDRV6URLs:    parseIPCCIDRURLs(p.CIDRV6URLs),
 			MTUOverride:   p.MTUOverride,
+			TLSCACert:     p.TLSCACert,
+			TLSCAPath:     p.TLSCAPath,
+			TLSInsecure:   p.TLSInsecure,
+			TLSPinnedHash: p.TLSPinnedHash,
 		}
 		if err := ipc.SendStart(client, cfg); err != nil {
 			fyne.Do(func() {
 				showError(i18n.T("DlgIPCError"), err.Error(), a.window)
 				a.stateLabel.SetText(i18n.T("StateDisconnected"))
-				a.connectBtn.Enable()
-				a.disconnectBtn.Disable()
+				a.setConnButtons(true, false)
 			})
 			return
 		}
@@ -148,18 +222,50 @@ func (a *App) onConnect() {
 	}()
 }
 
-// onDisconnect handles the Disconnect button click.
-func (a *App) onDisconnect() {
+// onRefreshCIDR handles the Refresh CIDR button click.
+func (a *App) onRefreshCIDR() {
 	a.mu.Lock()
 	client := a.ipcClient
 	a.mu.Unlock()
 	if client == nil {
 		return
 	}
+	a.refreshCIDRBtn.Disable()
+	go func() {
+		_ = ipc.SendRefreshCIDR(client)
+		time.Sleep(2 * time.Second)
+		fyne.Do(func() {
+			a.refreshCIDRBtn.Enable()
+		})
+	}()
+}
+
+// onDisconnect handles the Disconnect button click.
+func (a *App) onDisconnect() {
+	a.mu.Lock()
+	client := a.ipcClient
+	a.ipcClient = nil
+	a.mu.Unlock()
+	if client == nil {
+		return
+	}
 	_ = ipc.SendStop(client)
-	a.disconnectBtn.Disable()
-	a.connectBtn.Enable()
+	client.Close()
+	a.setConnButtons(true, false)
 	a.stateLabel.SetText(i18n.T("StateDisconnected"))
+	a.ipLabel.SetText(i18n.T("IpNone"))
+	a.ip6Label.SetText(i18n.T("Ip6None"))
+	a.uptimeLabel.SetText(i18n.T("UptimeNone"))
+	a.rxV4Label.SetText(i18n.T("RxV4Zero"))
+	a.txV4Label.SetText(i18n.T("TxV4Zero"))
+	a.rxV6Label.SetText(i18n.T("RxV6Zero"))
+	a.txV6Label.SetText(i18n.T("TxV6Zero"))
+	a.rxTotalLabel.SetText(i18n.T("RxTotalZero"))
+	a.txTotalLabel.SetText(i18n.T("TxTotalZero"))
+	a.routingModeLabel.Hide()
+	a.cidrV4Label.Hide()
+	a.cidrV6Label.Hide()
+	a.refreshCIDRBtn.Hide()
 }
 
 // eventLoop reads IPC events from the daemon and updates the UI.
@@ -181,11 +287,19 @@ func (a *App) eventLoop() {
 				if current == client {
 					a.stateLabel.SetText(i18n.T("StateDisconnected"))
 					a.ipLabel.SetText(i18n.T("IpNone"))
+					a.ip6Label.SetText(i18n.T("Ip6None"))
 					a.uptimeLabel.SetText(i18n.T("UptimeNone"))
-					a.rxLabel.SetText(i18n.T("RxZero"))
-					a.txLabel.SetText(i18n.T("TxZero"))
-					a.connectBtn.Enable()
-					a.disconnectBtn.Disable()
+					a.rxV4Label.SetText(i18n.T("RxV4Zero"))
+					a.txV4Label.SetText(i18n.T("TxV4Zero"))
+					a.rxV6Label.SetText(i18n.T("RxV6Zero"))
+					a.txV6Label.SetText(i18n.T("TxV6Zero"))
+					a.rxTotalLabel.SetText(i18n.T("RxTotalZero"))
+					a.txTotalLabel.SetText(i18n.T("TxTotalZero"))
+					a.routingModeLabel.Hide()
+					a.cidrV4Label.Hide()
+					a.cidrV6Label.Hide()
+					a.refreshCIDRBtn.Hide()
+					a.setConnButtons(true, false)
 				}
 			})
 			return
@@ -193,49 +307,102 @@ func (a *App) eventLoop() {
 		switch ev.Event {
 		case ipc.EvState:
 			fyne.Do(func() {
-				a.applyState(ev.State)
+				a.mu.Lock()
+				current := a.ipcClient
+				a.mu.Unlock()
+				if current == client {
+					a.applyStateWithStep(ev.State, ev.ConnectStep)
+				}
 			})
 		case ipc.EvStats:
 			if ev.Stats != nil {
 				s := *ev.Stats
 				fyne.Do(func() {
+					a.mu.Lock()
+					current := a.ipcClient
+					a.mu.Unlock()
+					if current == client {
 						a.applyStats(s)
+					}
 				})
 			}
 		case ipc.EvError:
 			fyne.Do(func() {
-				if ev.Message != "" {
-					showError(i18n.T("DlgVPNError"), ev.Message, a.window)
+				a.mu.Lock()
+				current := a.ipcClient
+				a.mu.Unlock()
+				if current != client {
+					return
+				}
+				if ev.Code == "tls_error" {
+					showError(i18n.T("DlgTLSError"),
+						i18n.T("TLSErrorVerification")+"\n\n"+ev.Message, a.window)
+				} else {
+					msg := authErrorMessage(ev.Code, ev.Message)
+					if msg != "" {
+						showError(i18n.T("DlgAuthError"), msg, a.window)
+					}
 				}
 			})
 		}
 	}
 }
 
+// authErrorMessage maps a stable auth-error code (carried by the EvError
+// IPC event from the daemon) to a localized user-facing string. For an
+// unknown or empty code it falls back to the raw server message.
+func authErrorMessage(code, fallback string) string {
+	switch code {
+	case "wrong_credentials":
+		return i18n.T("AuthErrWrongCredentials")
+	case "user_disabled":
+		return i18n.T("AuthErrUserDisabled")
+	case "token_invalid":
+		return i18n.T("AuthErrTokenInvalid")
+	case "rate_limited":
+		return i18n.T("AuthErrRateLimited")
+	case "malformed":
+		return i18n.T("AuthErrMalformed")
+	default:
+		return fallback
+	}
+}
+
 // applyState updates UI elements for a state change.
 func (a *App) applyState(state string) {
+	a.applyStateWithStep(state, "")
+}
+
+// applyStateWithStep updates UI elements for a state change, optionally
+// showing a connection step description (e.g. "fetching CIDR lists").
+func (a *App) applyStateWithStep(state, step string) {
+	stepLabel := connectStepLabel(step)
 	switch stats.State(state) {
 	case stats.StateConnected:
+		if stepLabel != "" {
+			a.stateLabel.SetText(i18n.T("StateConnected") + " (" + stepLabel + ")")
+		} else {
 			a.stateLabel.SetText(i18n.T("StateConnected"))
-		a.connectBtn.Disable()
-		a.disconnectBtn.Enable()
+		}
+		a.setConnButtons(false, true)
 	case stats.StateConnecting:
+		if stepLabel != "" {
+			a.stateLabel.SetText(i18n.T("StateConnecting") + " (" + stepLabel + ")")
+		} else {
 			a.stateLabel.SetText(i18n.T("StateConnecting"))
-		a.connectBtn.Disable()
-		a.disconnectBtn.Enable()
+		}
+		a.setConnButtons(false, true)
 	case stats.StateReconnecting:
 		a.stateLabel.SetText(i18n.T("StateReconnecting"))
-		a.connectBtn.Disable()
-		a.disconnectBtn.Enable()
+		a.setConnButtons(false, true)
 	case stats.StateDisconnected:
 		a.stateLabel.SetText(i18n.T("StateDisconnected"))
 		a.ipLabel.SetText(i18n.T("IpNone"))
-		a.connectBtn.Enable()
-		a.disconnectBtn.Disable()
+		a.ip6Label.SetText(i18n.T("Ip6None"))
+		a.setConnButtons(true, false)
 	case stats.StateError:
 		a.stateLabel.SetText(i18n.T("StateError"))
-		a.connectBtn.Enable()
-		a.disconnectBtn.Disable()
+		a.setConnButtons(true, false)
 	}
 }
 
@@ -244,14 +411,133 @@ func (a *App) applyStats(s stats.Snapshot) {
 	if s.AssignedIP != "" {
 		a.ipLabel.SetText(i18n.T("IpLabel", map[string]interface{}{"ip": s.AssignedIP}))
 	}
+	if s.AssignedIP6 != "" {
+		a.ip6Label.SetText(i18n.T("Ip6Label", map[string]interface{}{"ip": s.AssignedIP6}))
+	} else {
+		a.ip6Label.SetText(i18n.T("Ip6None"))
+	}
 	if s.State == stats.StateConnected {
+		stepLabel := connectStepLabel(s.ConnectStep)
+		if stepLabel != "" {
+			a.stateLabel.SetText(i18n.T("StateConnected") + " (" + stepLabel + ")")
+		} else {
 			a.stateLabel.SetText(i18n.T("StateConnected"))
 		}
-	a.rxLabel.SetText(i18n.T("RxLabel", map[string]interface{}{"bytes": formatBytes(s.RxBytes)}))
-	a.txLabel.SetText(i18n.T("TxLabel", map[string]interface{}{"bytes": formatBytes(s.TxBytes)}))
+	}
+	a.rxV4Label.SetText(i18n.T("RxV4Label", map[string]interface{}{
+		"bytes": formatBytes(s.RxBytesV4), "speed": formatSpeed(s.RxSpeedV4),
+	}))
+	a.txV4Label.SetText(i18n.T("TxV4Label", map[string]interface{}{
+		"bytes": formatBytes(s.TxBytesV4), "speed": formatSpeed(s.TxSpeedV4),
+	}))
+	a.rxV6Label.SetText(i18n.T("RxV6Label", map[string]interface{}{
+		"bytes": formatBytes(s.RxBytesV6), "speed": formatSpeed(s.RxSpeedV6),
+	}))
+	a.txV6Label.SetText(i18n.T("TxV6Label", map[string]interface{}{
+		"bytes": formatBytes(s.TxBytesV6), "speed": formatSpeed(s.TxSpeedV6),
+	}))
+	a.rxTotalLabel.SetText(i18n.T("RxTotalLabel", map[string]interface{}{
+		"bytes": formatBytes(s.RxBytes), "speed": formatSpeed(s.RxSpeed),
+	}))
+	a.txTotalLabel.SetText(i18n.T("TxTotalLabel", map[string]interface{}{
+		"bytes": formatBytes(s.TxBytes), "speed": formatSpeed(s.TxSpeed),
+	}))
 	if s.Uptime > 0 {
 		a.uptimeLabel.SetText(i18n.T("UptimeLabel", map[string]interface{}{"uptime": formatDuration(s.Uptime)}))
 	}
+
+	// Routing mode + CIDR hit statistics.
+	if s.RoutingMode != "" {
+		modeLabel := routeModeLabel(s.RoutingMode)
+		if s.RouteLoading {
+			modeLabel += " (" + i18n.T("RouteLoading") + ")"
+		}
+		a.routingModeLabel.SetText(i18n.T("StatusRoutingMode", map[string]interface{}{"mode": modeLabel}))
+		a.routingModeLabel.Show()
+
+		// Show CIDR error if present.
+		if s.CIDRError != "" {
+			a.cidrV4Label.SetText("IPv4 CIDR: " + i18n.T("CIDRFetchError"))
+			a.cidrV6Label.SetText("IPv6 CIDR: " + i18n.T("CIDRFetchError"))
+			a.cidrV4Label.Show()
+			a.cidrV6Label.Show()
+			a.refreshCIDRBtn.Show()
+		} else {
+			switch s.RoutingMode {
+			case "proxy":
+				if s.RouteLoading {
+					a.cidrV4Label.SetText(fmt.Sprintf("IPv4 CIDR: %d/%d (%s)",
+						s.CIDRV4Hits, s.CIDRV4Total, i18n.T("CIDRLoading")))
+					a.cidrV6Label.SetText(fmt.Sprintf("IPv6 CIDR: %d/%d (%s)",
+						s.CIDRV6Hits, s.CIDRV6Total, i18n.T("CIDRLoading")))
+				} else {
+					a.cidrV4Label.SetText(fmt.Sprintf("IPv4 CIDR: %d/%d %s",
+						s.CIDRV4Hits, s.CIDRV4Total, i18n.T("CIDRHit")))
+					a.cidrV6Label.SetText(fmt.Sprintf("IPv6 CIDR: %d/%d %s",
+						s.CIDRV6Hits, s.CIDRV6Total, i18n.T("CIDRHit")))
+				}
+				a.cidrV4Label.Show()
+				a.cidrV6Label.Show()
+				a.refreshCIDRBtn.Show()
+			case "bypass":
+				if s.RouteLoading {
+					a.cidrV4Label.SetText(fmt.Sprintf("IPv4 CIDR: %d/%d (%s)",
+						s.CIDRV4Hits, s.CIDRV4Total, i18n.T("CIDRLoading")))
+					a.cidrV6Label.SetText(fmt.Sprintf("IPv6 CIDR: %d/%d (%s)",
+						s.CIDRV6Hits, s.CIDRV6Total, i18n.T("CIDRLoading")))
+				} else {
+					a.cidrV4Label.SetText(fmt.Sprintf("IPv4 CIDR: %d %s | %s: %d %s",
+						s.CIDRV4Total, i18n.T("CIDRConfigured"),
+						i18n.T("CIDRUnmatched"), s.CIDRV4Hits, i18n.T("CIDRDestinations")))
+					a.cidrV6Label.SetText(fmt.Sprintf("IPv6 CIDR: %d %s | %s: %d %s",
+						s.CIDRV6Total, i18n.T("CIDRConfigured"),
+						i18n.T("CIDRUnmatched"), s.CIDRV6Hits, i18n.T("CIDRDestinations")))
+				}
+				a.cidrV4Label.Show()
+				a.cidrV6Label.Show()
+				a.refreshCIDRBtn.Show()
+			default:
+				a.cidrV4Label.Hide()
+				a.cidrV6Label.Hide()
+				a.refreshCIDRBtn.Hide()
+			}
+		}
+	} else {
+		a.routingModeLabel.Hide()
+		a.cidrV4Label.Hide()
+		a.cidrV6Label.Hide()
+		a.refreshCIDRBtn.Hide()
+	}
+}
+
+// routeModeLabel returns the localised display name for a routing mode
+// code string.
+func routeModeLabel(code string) string {
+	switch code {
+	case "full":
+		return i18n.T("RoutingModeFull")
+	case "proxy":
+		return i18n.T("RoutingModeProxy")
+	case "bypass":
+		return i18n.T("RoutingModeBypass")
+	default:
+		return code
+	}
+}
+
+// connectStepLabel translates a connection step code to a localised
+// display string. Returns "" for unknown/empty steps.
+func connectStepLabel(step string) string {
+	switch step {
+	case "fetch_cidrs":
+		return i18n.T("StepFetchCIDRs")
+	case "connecting":
+		return i18n.T("StepConnecting")
+	case "load_routes":
+		return i18n.T("StepLoadRoutes")
+	default:
+		return ""
+	}
 }
 
 // formatBytes formats a byte count human-readably.
@@ -268,6 +554,23 @@ func formatBytes(b int64) string {
 	return fmt.Sprintf("%.1f %ciB", float64(b)/float64(div), "KMGTPE"[exp])
 }
 
+// formatSpeed formats a bytes/sec rate as a decimal bits/sec rate
+// (kbps / Mbps / Gbps). bps is the byte rate; it is converted to bits
+// by multiplying by 8 and scaled by 1000 (decimal, network convention).
+func formatSpeed(bps int64) string {
+	const unit = 1000
+	bits := bps * 8
+	if bits < unit {
+		return fmt.Sprintf("%d bps", bits)
+	}
+	div, exp := int64(unit), 0
+	for n := bits / unit; n >= unit; n /= unit {
+		div *= unit
+		exp++
+	}
+	return fmt.Sprintf("%.1f %cbps", float64(bits)/float64(div), "kMGTPE"[exp])
+}
+
 // formatDuration formats an uptime duration.
 func formatDuration(d time.Duration) string {
 	d = d.Round(time.Second)
@@ -283,20 +586,32 @@ func formatDuration(d time.Duration) string {
 	return fmt.Sprintf("%ds", s)
 }
 
-// splitCIDRs splits a comma-separated CIDR string into a slice.
-func splitCIDRs(s string) []string {
-	if s == "" {
+// parseIPCCIDRURLs decodes a JSON-encoded model.CIDRURLSource array
+// from the profile string and converts it to the IPC wire type.
+func parseIPCCIDRURLs(jsonStr string) []ipc.CIDRURLSource {
+	sources := model.ParseCIDRURLs(jsonStr)
+	if len(sources) == 0 {
 		return nil
 	}
-	var out []string
-	start := 0
-	for i := 0; i <= len(s); i++ {
-		if i == len(s) || s[i] == ',' {
-			if i > start {
-				out = append(out, s[start:i])
-			}
-			start = i + 1
+	out := make([]ipc.CIDRURLSource, len(sources))
+	for i, s := range sources {
+		out[i] = ipc.CIDRURLSource{
+			URL:         s.URL,
+			FetchTiming: string(s.FetchTiming),
 		}
 	}
 	return out
 }
+
+// marshalCIDRURLs encodes a slice of CIDRURLSource to a JSON string
+// for storage in the database.
+func marshalCIDRURLs(sources []model.CIDRURLSource) string {
+	if len(sources) == 0 {
+		return ""
+	}
+	data, err := json.Marshal(sources)
+	if err != nil {
+		return ""
+	}
+	return string(data)
+}

internal/version/version.go

@@ -0,0 +1,15 @@
+// Package version holds the build version string shared by the GUI
+// (lmvpn) and daemon (lmvpnd) binaries. The value is injected at link
+// time via ldflags:
+//
+//	-X lmvpn/internal/version.Version=$(VERSION)
+//
+// Both binaries are built with the same LDFLAGS, so a version mismatch
+// between the running daemon and the GUI indicates a stale daemon
+// process that predates the current build.
+package version
+
+// Version is the application version. Overridden at link time; "dev"
+// when running an untagged build (e.g. go run / go build without
+// ldflags).
+var Version = "dev"

internal/vpn/session.go

@@ -9,18 +9,24 @@ package vpn
 
 import (
 	"context"
+	"crypto/tls"
 	"errors"
 	"fmt"
 	"net"
+	"net/http"
+	"strings"
 	"sync"
+	"sync/atomic"
 	"time"
 
 	"lmvpn/internal/auth"
+	"lmvpn/internal/cidrsource"
 	"lmvpn/internal/log"
 	"lmvpn/internal/model"
 	"lmvpn/internal/protocol"
 	"lmvpn/internal/route"
 	"lmvpn/internal/stats"
+	"lmvpn/internal/tlsconfig"
 	"lmvpn/internal/transport"
 	"lmvpn/internal/tun"
 )
@@ -35,8 +41,15 @@ type SessionConfig struct {
 	AuthMode    model.AuthMode
 	Token       string // pre-obtained JWT (empty = fetch via HTTP login)
 	RoutingMode route.Mode
-	CustomCIDRs []string
+	CIDRV4      []string              // static IPv4 CIDRs (proxy/bypass mode)
+	CIDRV6      []string              // static IPv6 CIDRs (proxy/bypass mode)
+	CIDRV4URLs  []model.CIDRURLSource // IPv4 CIDR URL sources
+	CIDRV6URLs  []model.CIDRURLSource // IPv6 CIDR URL sources
 	MTUOverride int                   // 0 = use server MTU
+	TLSCACert     string // inline CA cert PEM (wss only)
+	TLSCAPath     string // CA cert file path (wss only)
+	TLSInsecure   bool   // skip cert verification (wss only)
+	TLSPinnedHash string // SHA-256 cert pin (wss only)
 }
 
 // SessionManager manages a single VPN session with auto-reconnect.
@@ -44,6 +57,7 @@ type SessionManager struct {
 	stats   *stats.Stats
 	onState func(stats.State)
 	onStats func(stats.Snapshot)
+	onError func(code string, msg string)
 
 	mu       sync.Mutex
 	running  bool
@@ -51,16 +65,38 @@ type SessionManager struct {
 	dev      tun.Device
 	routeMgr *route.Manager
 	conn     *transport.Conn
+	done     chan struct{}
+
+	// CIDR hit tracking. Set during setupTUN, cleared on cleanup.
+	cidrTracker *cidrTracker
+
+	// lastCfg stores the session config for RefreshCIDRs.
+	lastCfg SessionConfig
+
+	// EWMA speed smoothing state. Only touched by reportStats (single
+	// goroutine), so no lock needed. ewma* fields hold the smoothed
+	// bytes/sec; prev* hold the last snapshot's cumulative counters and
+	// tick time for delta computation.
+	ewmaRxV4   float64
+	ewmaTxV4   float64
+	ewmaRxV6   float64
+	ewmaTxV6   float64
+	prevSnap   stats.Snapshot
+	prevTick   time.Time
+	speedReady bool
 }
 
 // New creates a SessionManager. The onState callback (if non-nil) is
 // invoked on every state transition. The onStats callback (if non-nil)
-// is invoked periodically while connected.
-func New(onState func(stats.State), onStats func(stats.Snapshot)) *SessionManager {
+// is invoked periodically while connected. The onError callback (if
+// non-nil) is invoked once when a fatal, non-retryable error (such as
+// an authentication failure) terminates the session.
+func New(onState func(stats.State), onStats func(stats.Snapshot), onError func(string, string)) *SessionManager {
 	return &SessionManager{
 		stats:   stats.New(),
 		onState: onState,
 		onStats: onStats,
+		onError: onError,
 	}
 }
 
@@ -82,6 +118,8 @@ func (sm *SessionManager) Connect(ctx context.Context, cfg SessionConfig) error
 	ctx, cancel := context.WithCancel(ctx)
 	sm.cancel = cancel
 	sm.running = true
+	sm.done = make(chan struct{})
+	sm.lastCfg = cfg
 	sm.mu.Unlock()
 
 	go sm.run(ctx, cfg)
@@ -98,23 +136,78 @@ func (sm *SessionManager) Disconnect() {
 	}
 	sm.running = false
 	cancel := sm.cancel
+	// Extract resources so we can clean them up outside the lock.
+	// Setting them to nil here also prevents the run goroutine's
+	// cleanup from double-cleaning (it will see nil and skip).
+	routeMgr := sm.routeMgr
+	conn := sm.conn
+	dev := sm.dev
+	sm.routeMgr = nil
+	sm.conn = nil
+	sm.dev = nil
+	sm.cidrTracker = nil
 	sm.mu.Unlock()
+
 	if cancel != nil {
 		cancel()
 	}
-	// Close the transport to unblock the packet pump.
-	sm.mu.Lock()
-	conn := sm.conn
-	sm.mu.Unlock()
+
+	// CRITICAL: remove routes BEFORE closing the TUN device. If the TUN
+	// is closed first, the /1 cover routes still point at the dead TUN
+	// and all traffic is blackholed until routeMgr.Cleanup() runs -
+	// this causes a brief network outage (browsers, DNS, etc.).
+	if routeMgr != nil {
+		if err := routeMgr.Cleanup(); err != nil {
+			log.L().Error("route cleanup error during disconnect", "error", err)
+		}
+	}
+
+	// Now safe to close the transport and TUN device.
 	if conn != nil {
 		conn.Close()
 	}
+	if dev != nil {
+		dev.Close()
+	}
+
+	// Wait for the run goroutine to fully exit. By now it should be
+	// unblocked (ctx cancelled, conn/dev closed) and will see nil
+	// routeMgr/conn/dev in cleanup, so it won't double-clean.
+	if sm.done != nil {
+		<-sm.done
+	}
 }
 
 // run is the main session loop with exponential-backoff reconnection
 // and CDN IP failover.
 func (sm *SessionManager) run(ctx context.Context, cfg SessionConfig) {
-	defer sm.setState(stats.StateDisconnected)
+	fatal := false
+	defer close(sm.done)
+	defer func() {
+		if !fatal && ctx.Err() == nil {
+			sm.setState(stats.StateDisconnected)
+		}
+	}()
+
+	// Fetch "before-proxy" CIDR lists ONCE before the reconnect loop.
+	// These HTTP requests go through the physical NIC (routes are
+	// clean). The result is reused across reconnection attempts so we
+	// don't re-fetch on every retry. This runs outside the handshake
+	// to avoid consuming the server's 30s ReadyTimeout budget.
+	var beforeCIDRs []string
+	allURLSources := append(append([]model.CIDRURLSource{}, cfg.CIDRV4URLs...), cfg.CIDRV6URLs...)
+	if len(allURLSources) > 0 {
+		sm.stats.SetConnectStep("fetch_cidrs")
+		sm.setState(stats.StateConnecting)
+		log.L().Info("fetching before-proxy CIDR lists", "url_count", len(allURLSources))
+		fetched, err := cidrsource.FetchBeforeProxy(ctx, allURLSources)
+		if err != nil {
+			log.L().Error("fetch before-proxy CIDR lists failed (continuing)", "error", err)
+		}
+		beforeCIDRs = fetched
+		log.L().Info("before-proxy CIDR lists ready", "total_cidrs", len(beforeCIDRs))
+		sm.stats.SetConnectStep("")
+	}
 
 	backoff := time.Second
 	maxBackoff := 60 * time.Second
@@ -125,6 +218,7 @@ func (sm *SessionManager) run(ctx context.Context, cfg SessionConfig) {
 
 	for {
 		if ctx.Err() != nil {
+			sm.cleanup()
 			return
 		}
 
@@ -133,7 +227,7 @@ func (sm *SessionManager) run(ctx context.Context, cfg SessionConfig) {
 			targetIP = targets[ipIndex]
 		}
 
-		err := sm.connectOnce(ctx, cfg, targetIP)
+		err := sm.connectOnce(ctx, cfg, targetIP, beforeCIDRs)
 		if ctx.Err() != nil {
 			sm.cleanup()
 			return
@@ -141,6 +235,53 @@ func (sm *SessionManager) run(ctx context.Context, cfg SessionConfig) {
 
 		if err != nil {
 			log.L().Error("VPN connection failed", "error", err)
+
+			// Safety net: ensure no TUN/routes leak from a failed
+			// attempt. connectOnce should have already cleaned up, but
+			// this guards against any path that returned early.
+			sm.cleanupResources()
+
+			// A TLS certificate verification failure on the original
+			// hostname (ipIndex == 0) is not retryable: the cert won't
+			// change between attempts, so stop the loop and surface the
+			// reason to the user. On a CDN edge IP (ipIndex > 0) the
+			// TLS error likely means that IP points to a different
+			// server; skip it and try the next target.
+			if tlsconfig.IsTLSError(err) {
+				if ipIndex == 0 {
+					log.L().Warn("fatal TLS error, stopping reconnect", "error", err)
+					sm.setState(stats.StateError)
+					if sm.onError != nil {
+						sm.onError("tls_error", err.Error())
+					}
+					fatal = true
+					sm.cleanup()
+					return
+				}
+				log.L().Warn("TLS error on CDN IP, skipping",
+					"index", ipIndex, "ip", targets[ipIndex], "error", err)
+			}
+
+			// A fatal authentication failure (wrong password, disabled
+			// account, expired token, rate limit) on the original
+			// hostname is not retryable. On a CDN edge IP it likely
+			// means the IP points to a different server that returned
+			// 401/403, so skip it instead of stopping the loop.
+			if code, msg, isFatal := fatalAuthError(err); isFatal {
+				if ipIndex == 0 {
+					log.L().Warn("fatal auth error, stopping reconnect", "code", code, "message", msg)
+					sm.setState(stats.StateError)
+					if sm.onError != nil {
+						sm.onError(string(code), msg)
+					}
+					fatal = true
+					sm.cleanup()
+					return
+				}
+				log.L().Warn("auth error on CDN IP, skipping",
+					"index", ipIndex, "ip", targets[ipIndex], "code", code)
+			}
+
 			sm.setState(stats.StateReconnecting)
 
 			// Try next CDN IP immediately.
@@ -169,10 +310,48 @@ func (sm *SessionManager) run(ctx context.Context, cfg SessionConfig) {
 	}
 }
 
+// fatalAuthError inspects err and, if it represents a permanent
+// authentication failure that should not be retried, returns the
+// stable error code, the raw server message, and true. It recognises
+// all three auth-failure shapes produced by the transport/auth layers:
+//   - *transport.AuthError        (WebSocket auth_err at the auth stage)
+//   - *transport.ServerError      (auth_err at the init stage, JWT path)
+//   - *auth.LoginError            (HTTP /api/login failure, JWT path)
+//
+// errors.As transparently unwraps fmt.Errorf("...: %w", err) chains,
+// so the wrapped LoginError returned by connectOnce is matched too.
+// A non-empty code is required: an auth_err with an unrecognized
+// message is treated as non-fatal so the loop falls back to retrying
+// (the server still closed the connection, but we lack a categorical
+// reason to give up).
+func fatalAuthError(err error) (protocol.AuthErrorCode, string, bool) {
+	var authErr *transport.AuthError
+	if errors.As(err, &authErr) {
+		return authErr.Code, authErr.Message, authErr.Code != ""
+	}
+	var serverErr *transport.ServerError
+	if errors.As(err, &serverErr) && serverErr.Type == protocol.TypeAuthErr {
+		return serverErr.Code, serverErr.Message, serverErr.Code != ""
+	}
+	var loginErr *auth.LoginError
+	if errors.As(err, &loginErr) {
+		switch loginErr.Code {
+		case http.StatusTooManyRequests:
+			return protocol.AuthCodeRateLimited, loginErr.Message, true
+		case http.StatusUnauthorized, http.StatusForbidden:
+			return protocol.AuthCodeWrongCredentials, loginErr.Message, true
+		}
+	}
+	return "", "", false
+}
+
 // connectOnce performs a single connection lifecycle: authenticate,
 // handshake, configure TUN, apply routes, pump packets until failure.
-func (sm *SessionManager) connectOnce(ctx context.Context, cfg SessionConfig, targetIP string) error {
+// beforeCIDRs contains CIDRs pre-fetched from "before" timing URL
+// sources (fetched once in run(), reused across reconnection attempts).
+func (sm *SessionManager) connectOnce(ctx context.Context, cfg SessionConfig, targetIP string, beforeCIDRs []string) error {
 	sm.setState(stats.StateConnecting)
+	sm.stats.SetConnectStep("connecting")
 
 	// Build URL for this attempt. If targetIP is set (CDN failover),
 	// build a URL with that IP. Otherwise use base ServerURL.
@@ -181,6 +360,28 @@ func (sm *SessionManager) connectOnce(ctx context.Context, cfg SessionConfig, ta
 		serverURL = replaceHost(cfg.ServerURL, targetIP)
 	}
 
+	// Build TLS config for wss:// connections. For ws:// there is no
+	// TLS layer, so tlsCfg remains nil and both the HTTP client and
+	// the WebSocket dialer use their default (plaintext) behaviour.
+	var tlsCfg *tls.Config
+	if strings.HasPrefix(serverURL, "wss://") {
+		serverName := cfg.SNIHost
+		if serverName == "" {
+			serverName = serverHostFromURL(cfg.ServerURL)
+		}
+		var err error
+		tlsCfg, err = tlsconfig.Build(tlsconfig.Config{
+			ServerName:         serverName,
+			CACertPEM:          cfg.TLSCACert,
+			CACertPath:         cfg.TLSCAPath,
+			InsecureSkipVerify: cfg.TLSInsecure,
+			PinnedCertHash:     cfg.TLSPinnedHash,
+		})
+		if err != nil {
+			return fmt.Errorf("tls config: %w", err)
+		}
+	}
+
 	// Determine auth strategy and obtain JWT if needed.
 	token := cfg.Token
 	if token == "" && (cfg.AuthMode == model.AuthModeJWT || cfg.AuthMode == model.AuthModeBoth) {
@@ -188,7 +389,7 @@ func (sm *SessionManager) connectOnce(ctx context.Context, cfg SessionConfig, ta
 		if err != nil {
 			return fmt.Errorf("parse server URL: %w", err)
 		}
-		result, err := auth.Login(httpBase, cfg.Username, cfg.Password)
+		result, err := auth.Login(ctx, httpBase, cfg.Username, cfg.Password, tlsCfg)
 		if err != nil {
 			if cfg.AuthMode == model.AuthModeBoth {
 				// Fall back to password auth.
@@ -210,8 +411,9 @@ func (sm *SessionManager) connectOnce(ctx context.Context, cfg SessionConfig, ta
 		Username:  cfg.Username,
 		Password:  cfg.Password,
 		OnInit: func(init protocol.InitMessage) error {
-			return sm.setupTUN(init, cfg)
+			return sm.setupTUN(init, cfg, beforeCIDRs)
 		},
+		TLSConfig: tlsCfg,
 	}
 
 	// Attempt JWT connection first; fall back to password on auth error.
@@ -225,11 +427,19 @@ func (sm *SessionManager) connectOnce(ctx context.Context, cfg SessionConfig, ta
 			if errors.As(err, &authErr) ||
 				(errors.As(err, &serverErr) && serverErr.Type == protocol.TypeAuthErr) {
 				log.L().Info("JWT auth failed, falling back to password auth", "error", err)
+				// Clean up any resources created by the failed attempt's
+				// setupTUN before retrying.
+				sm.cleanupResources()
 				handshake.Token = ""
 				conn, err = transport.Connect(ctx, handshake)
 			}
 		}
 		if err != nil {
+			// Clean up TUN/routes if setupTUN ran but the handshake
+			// failed (e.g. server closed the connection after
+			// ReadyTimeout). Without this, leaked /1 cover routes
+			// blackhole all traffic and prevent reconnection.
+			sm.cleanupResources()
 			return err
 		}
 	}
@@ -238,16 +448,39 @@ func (sm *SessionManager) connectOnce(ctx context.Context, cfg SessionConfig, ta
 	sm.conn = conn
 	sm.mu.Unlock()
 
-	sm.stats.SetConnected(conn.Init().IP)
+	sm.stats.SetConnected(conn.Init().IP, conn.Init().IP6)
+	sm.stats.SetConnectStep("load_routes")
 	sm.setState(stats.StateConnected)
 	log.L().Info("VPN connected",
 		"ip", conn.Init().IP, "server_ip", conn.Init().ServerIP,
+		"ip6", conn.Init().IP6, "server_ip6", conn.Init().ServerIP6,
 		"mtu", conn.Init().MTU)
 
 	// Start stats reporter.
 	statsDone := make(chan struct{})
 	go sm.reportStats(statsDone, ctx)
 
+	// Apply deferred routes (user CIDRs) and fetch after-proxy CIDR
+	// lists in a background goroutine. For proxy/bypass modes with
+	// thousands of CIDRs this uses batch script execution (~3-5s).
+	go func() {
+		sm.mu.Lock()
+		mgr := sm.routeMgr
+		sm.mu.Unlock()
+		if mgr != nil {
+			sm.stats.SetRouteLoading(true)
+			sm.stats.SetConnectStep("load_routes")
+			log.L().Info("applying deferred routes")
+			if err := mgr.ApplyDeferred(); err != nil {
+				log.L().Error("apply deferred routes failed (continuing)", "error", err)
+			}
+			sm.stats.SetRouteLoading(false)
+			sm.stats.SetConnectStep("")
+			log.L().Info("deferred routes applied")
+		}
+		sm.fetchAfterProxyCIDRs(ctx, cfg)
+	}()
+
 	// Run the packet pump (blocks until connection breaks).
 	sm.pumpPackets(ctx, conn)
 
@@ -258,8 +491,12 @@ func (sm *SessionManager) connectOnce(ctx context.Context, cfg SessionConfig, ta
 
 // setupTUN creates and configures the TUN device and applies routes.
 // This is called by the transport during the handshake, between init
-// and ready.
-func (sm *SessionManager) setupTUN(init protocol.InitMessage, cfg SessionConfig) error {
+// and ready. It performs NO network calls (HTTP/DNS) so it completes
+// in milliseconds and never exceeds the server's ReadyTimeout.
+//
+// beforeCIDRs contains CIDRs fetched from "before" timing URL sources,
+// pre-fetched by connectOnce before the handshake began.
+func (sm *SessionManager) setupTUN(init protocol.InitMessage, cfg SessionConfig, beforeCIDRs []string) error {
 	dev, err := tun.Create("")
 	if err != nil {
 		return fmt.Errorf("create tun: %w", err)
@@ -271,43 +508,176 @@ func (sm *SessionManager) setupTUN(init protocol.InitMessage, cfg SessionConfig)
 	localIP := net.ParseIP(init.IP)
 	peerIP := net.ParseIP(init.ServerIP)
 	if localIP == nil || peerIP == nil {
-		dev.Close()
 		return fmt.Errorf("invalid init IPs: %s / %s", init.IP, init.ServerIP)
 	}
 
 	if err := dev.Configure(localIP, init.Prefix, peerIP); err != nil {
-		dev.Close()
 		return fmt.Errorf("configure tun: %w", err)
 	}
 
+	// Configure IPv6 address when the server assigned one (dual-stack).
+	hasV6 := init.IP6 != ""
+	if hasV6 {
+		ip6 := net.ParseIP(init.IP6)
+		if ip6 == nil {
+			return fmt.Errorf("invalid init IPv6: %s", init.IP6)
+		}
+		if err := dev.ConfigureIPv6(ip6, init.Prefix6); err != nil {
+			return fmt.Errorf("configure tun ipv6: %w", err)
+		}
+	}
+
 	mtu := init.MTU
 	if cfg.MTUOverride > 0 {
 		mtu = cfg.MTUOverride
 	}
 	if err := dev.SetMTU(mtu); err != nil {
-		dev.Close()
 		return fmt.Errorf("set mtu: %w", err)
 	}
 
+	// Merge static CIDRs with pre-fetched before-proxy CIDRs.
+	var cidrs []string
+	cidrs = append(cidrs, cfg.CIDRV4...)
+	cidrs = append(cidrs, cfg.CIDRV6...)
+	cidrs = append(cidrs, beforeCIDRs...)
+
 	// Apply routing.
 	routeCfg := route.Config{
 		Mode:          cfg.RoutingMode,
 		InterfaceName: dev.Name(),
 		VPNIP:         init.IP,
 		VPNPrefix:     init.Prefix,
+		VPNIP6:        init.IP6,
+		VPNPrefix6:    init.Prefix6,
 		ServerHost:    serverHostFromURL(cfg.ServerURL),
-		CustomCIDRs:   cfg.CustomCIDRs,
+		CIDRs:         cidrs,
 	}
 	sm.routeMgr = route.NewManager(routeCfg)
 	if err := sm.routeMgr.Apply(); err != nil {
 		log.L().Error("route apply failed (continuing)", "error", err)
 	}
 
+	// Initialise the CIDR hit tracker for proxy/bypass modes.
+	sm.cidrTracker = newCIDRTracker(cfg.RoutingMode, cidrs)
+
+	// Log CIDR breakdown by family for diagnostics.
+	v4Total, _, v6Total, _ := sm.cidrTracker.Stats()
 	log.L().Info("TUN configured",
-		"dev", dev.Name(), "ip", init.IP, "prefix", init.Prefix, "mtu", mtu)
+		"dev", dev.Name(), "ip", init.IP, "prefix", init.Prefix,
+		"ip6", init.IP6, "prefix6", init.Prefix6, "mtu", mtu,
+		"routing_mode", cfg.RoutingMode,
+		"cidr_v4", v4Total, "cidr_v6", v6Total,
+		"before_proxy_cidrs", len(beforeCIDRs))
 	return nil
 }
 
+// fetchAfterProxyCIDRs fetches CIDR lists from URLs with "after" timing
+// (via the tunnel) and dynamically adds their routes to the route
+// manager. This is called in a goroutine after the data plane is up.
+func (sm *SessionManager) fetchAfterProxyCIDRs(ctx context.Context, cfg SessionConfig) {
+	allURLSources := append(append([]model.CIDRURLSource{}, cfg.CIDRV4URLs...), cfg.CIDRV6URLs...)
+	// Count only "after" sources for logging.
+	afterCount := 0
+	for _, s := range allURLSources {
+		if s.FetchTiming == model.FetchAfter {
+			afterCount++
+		}
+	}
+	if afterCount == 0 {
+		return
+	}
+
+	sm.stats.SetRouteLoading(true)
+	sm.stats.SetConnectStep("fetch_cidrs")
+	log.L().Info("fetching after-proxy CIDR lists", "url_count", afterCount)
+	fetched, err := cidrsource.FetchAfterProxy(ctx, allURLSources)
+	sm.stats.SetConnectStep("load_routes")
+	if err != nil {
+		log.L().Error("fetch after-proxy CIDR lists completed with errors", "error", err)
+		sm.stats.SetCIDRError(err.Error())
+	} else {
+		sm.stats.SetCIDRError("")
+	}
+	if len(fetched) == 0 {
+		sm.stats.SetRouteLoading(false)
+		sm.stats.SetConnectStep("")
+		return
+	}
+
+	merged := fetched // AddRoutes already calls mergeCIDRs internally
+	added := sm.addCIDRRoutes(fetched)
+	if added > 0 {
+		log.L().Info("added after-proxy routes", "fetched", len(fetched), "added", added, "merged", len(merged))
+	}
+
+	sm.stats.SetRouteLoading(false)
+	sm.stats.SetConnectStep("")
+}
+
+// addCIDRRoutes adds routes and updates the CIDR tracker. Returns the
+// number of CIDRs successfully added (after merge).
+func (sm *SessionManager) addCIDRRoutes(cidrs []string) int {
+	sm.mu.Lock()
+	mgr := sm.routeMgr
+	tracker := sm.cidrTracker
+	sm.mu.Unlock()
+	if mgr == nil {
+		return 0
+	}
+
+	if err := mgr.AddRoutes(cidrs); err != nil {
+		log.L().Error("add CIDR routes failed (continuing)", "error", err)
+	}
+	if tracker != nil {
+		tracker.AddCIDRs(cidrs)
+	}
+	return len(cidrs)
+}
+
+// RefreshCIDRs re-fetches all CIDR URL sources (both before and after
+// timing) via the current tunnel and dynamically adds their routes.
+// This is called when the user clicks the "Refresh CIDR" button.
+func (sm *SessionManager) RefreshCIDRs() {
+	sm.mu.Lock()
+	ctx := sm.cancel
+	cfg := sm.lastCfg
+	sm.mu.Unlock()
+	if ctx == nil {
+		return
+	}
+
+	// Use a background context with 30s timeout so the refresh works
+	// even if the session context is in a weird state.
+	refreshCtx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+	defer cancel()
+	_ = refreshCtx
+
+	allURLSources := append(append([]model.CIDRURLSource{}, cfg.CIDRV4URLs...), cfg.CIDRV6URLs...)
+	if len(allURLSources) == 0 {
+		return
+	}
+
+	sm.stats.SetRouteLoading(true)
+	sm.stats.SetCIDRError("")
+	log.L().Info("refreshing CIDR lists", "url_count", len(allURLSources))
+
+	fetched, err := cidrsource.FetchAfterProxy(refreshCtx, allURLSources)
+	if err != nil {
+		log.L().Error("refresh CIDR lists completed with errors", "error", err)
+		sm.stats.SetCIDRError(err.Error())
+	} else {
+		sm.stats.SetCIDRError("")
+	}
+	if len(fetched) == 0 {
+		sm.stats.SetRouteLoading(false)
+		return
+	}
+
+	added := sm.addCIDRRoutes(fetched)
+	log.L().Info("refreshed CIDR routes", "fetched", len(fetched), "added", added)
+	sm.stats.SetRouteLoading(false)
+}
+
 // pumpPackets runs the bidirectional packet loop until the connection
 // breaks.
 func (sm *SessionManager) pumpPackets(ctx context.Context, conn *transport.Conn) {
@@ -318,6 +688,12 @@ func (sm *SessionManager) pumpPackets(ctx context.Context, conn *transport.Conn)
 	go func() {
 		defer wg.Done()
 		buf := make([]byte, 65536)
+		// Cache the cidrTracker pointer once; it is stable for the
+		// lifetime of pumpPackets (set in setupTUN, cleared in cleanup
+		// which only runs after pumpPackets returns).
+		sm.mu.Lock()
+		tracker := sm.cidrTracker
+		sm.mu.Unlock()
 		for {
 			select {
 			case <-ctx.Done():
@@ -341,7 +717,10 @@ func (sm *SessionManager) pumpPackets(ctx context.Context, conn *transport.Conn)
 				}
 				return
 			}
-			sm.stats.TxBytes.Add(int64(n))
+			sm.stats.AddTx(buf[:n])
+			if tracker != nil {
+				tracker.Record(buf[:n])
+			}
 		}
 	}()
 
@@ -368,15 +747,19 @@ func (sm *SessionManager) pumpPackets(ctx context.Context, conn *transport.Conn)
 				conn.Close()
 				return
 			}
-			sm.stats.RxBytes.Add(int64(len(data)))
+			sm.stats.AddRx(data)
 		}
 	}()
 
 	wg.Wait()
 }
 
-// cleanup tears down the TUN device and routes.
-func (sm *SessionManager) cleanup() {
+// cleanupResources tears down the TUN device, routes, and transport
+// connection WITHOUT changing the session state. This is used on
+// handshake-failure paths where the caller will set the appropriate
+// state (e.g. StateReconnecting). Returns without error if nothing
+// was set up.
+func (sm *SessionManager) cleanupResources() {
 	sm.mu.Lock()
 	dev := sm.dev
 	routeMgr := sm.routeMgr
@@ -384,6 +767,7 @@ func (sm *SessionManager) cleanup() {
 	sm.dev = nil
 	sm.routeMgr = nil
 	sm.conn = nil
+	sm.cidrTracker = nil
 	sm.mu.Unlock()
 
 	if routeMgr != nil {
@@ -397,6 +781,12 @@ func (sm *SessionManager) cleanup() {
 	if conn != nil {
 		conn.Close()
 	}
+}
+
+// cleanup tears down the TUN device, routes, and transport, then marks
+// the session as disconnected. Used on normal session termination.
+func (sm *SessionManager) cleanup() {
+	sm.cleanupResources()
 	sm.stats.SetDisconnected()
 }
 
@@ -428,9 +818,15 @@ func (sm *SessionManager) setState(s stats.State) {
 }
 
 // reportStats periodically calls the onStats callback while connected.
+// On each tick it derives per-family speeds (bytes/sec) from the
+// delta between the current and previous cumulative counters, then
+// applies EWMA smoothing (0.7 old + 0.3 new) so the displayed rates
+// don't jitter. The combined speeds are the sum of the per-family
+// smoothed values.
 func (sm *SessionManager) reportStats(done <-chan struct{}, ctx context.Context) {
 	ticker := time.NewTicker(time.Second)
 	defer ticker.Stop()
+	const ewmaAlpha = 0.3
 	for {
 		select {
 		case <-done:
@@ -438,9 +834,63 @@ func (sm *SessionManager) reportStats(done <-chan struct{}, ctx context.Context)
 		case <-ctx.Done():
 			return
 		case <-ticker.C:
-			if sm.onStats != nil {
-				sm.onStats(sm.stats.Snapshot())
+			if sm.onStats == nil {
+				continue
 			}
+			snap := sm.stats.Snapshot()
+			now := time.Now()
+			if sm.speedReady {
+				elapsed := now.Sub(sm.prevTick).Seconds()
+				if elapsed <= 0 {
+					elapsed = 1
+				}
+				// Per-second deltas (bytes/sec), clamped to >= 0 in case
+				// of counter resets between reconnects within the same
+				// SessionManager lifetime.
+				rxV4 := max(0.0, float64(snap.RxBytesV4-sm.prevSnap.RxBytesV4)/elapsed)
+				txV4 := max(0.0, float64(snap.TxBytesV4-sm.prevSnap.TxBytesV4)/elapsed)
+				rxV6 := max(0.0, float64(snap.RxBytesV6-sm.prevSnap.RxBytesV6)/elapsed)
+				txV6 := max(0.0, float64(snap.TxBytesV6-sm.prevSnap.TxBytesV6)/elapsed)
+				if sm.ewmaRxV4 == 0 && sm.ewmaTxV4 == 0 && sm.ewmaRxV6 == 0 && sm.ewmaTxV6 == 0 {
+					// First real sample: seed instead of ramping from 0.
+					sm.ewmaRxV4, sm.ewmaTxV4, sm.ewmaRxV6, sm.ewmaTxV6 = rxV4, txV4, rxV6, txV6
+				} else {
+					sm.ewmaRxV4 = sm.ewmaRxV4*(1-ewmaAlpha) + rxV4*ewmaAlpha
+					sm.ewmaTxV4 = sm.ewmaTxV4*(1-ewmaAlpha) + txV4*ewmaAlpha
+					sm.ewmaRxV6 = sm.ewmaRxV6*(1-ewmaAlpha) + rxV6*ewmaAlpha
+					sm.ewmaTxV6 = sm.ewmaTxV6*(1-ewmaAlpha) + txV6*ewmaAlpha
+				}
+				snap.RxSpeedV4 = int64(sm.ewmaRxV4)
+				snap.TxSpeedV4 = int64(sm.ewmaTxV4)
+				snap.RxSpeedV6 = int64(sm.ewmaRxV6)
+				snap.TxSpeedV6 = int64(sm.ewmaTxV6)
+				snap.RxSpeed = snap.RxSpeedV4 + snap.RxSpeedV6
+				snap.TxSpeed = snap.TxSpeedV4 + snap.TxSpeedV6
+			}
+			sm.prevSnap = snap
+			// Clear speed fields on the stored prev copy so we don't
+			// accidentally carry stale speed into the next delta base
+			// (only cumulative bytes matter for deltas).
+			sm.prevSnap.RxSpeedV4, sm.prevSnap.TxSpeedV4 = 0, 0
+			sm.prevSnap.RxSpeedV6, sm.prevSnap.TxSpeedV6 = 0, 0
+			sm.prevSnap.RxSpeed, sm.prevSnap.TxSpeed = 0, 0
+			sm.prevTick = now
+			sm.speedReady = true
+
+			// Fill in CIDR hit statistics.
+			sm.mu.Lock()
+			tracker := sm.cidrTracker
+			sm.mu.Unlock()
+			if tracker != nil {
+				v4Total, v4Hits, v6Total, v6Hits := tracker.Stats()
+				snap.RoutingMode = string(tracker.mode)
+				snap.CIDRV4Total = v4Total
+				snap.CIDRV4Hits = v4Hits
+				snap.CIDRV6Total = v6Total
+				snap.CIDRV6Hits = v6Hits
+			}
+
+			sm.onStats(snap)
 		}
 	}
 }
@@ -478,7 +928,14 @@ func wsURLToHTTP(wsURL string) (string, error) {
 
 // replaceHost substitutes the host portion of a URL string.
 // e.g. wss://host:443/ws with 1.2.3.4 → wss://1.2.3.4:443/ws
+// Bare IPv6 addresses are automatically bracketed:
+// wss://host:443/ws with 2001:db8::1 → wss://[2001:db8::1]:443/ws
 func replaceHost(rawURL, newHost string) string {
+	// Auto-bracket bare IPv6 addresses so the colons in the address
+	// are not confused with the port separator.
+	if ip := net.ParseIP(newHost); ip != nil && ip.To4() == nil && !strings.HasPrefix(newHost, "[") {
+		newHost = "[" + newHost + "]"
+	}
 	u := rawURL
 	for _, prefix := range []string{"wss://", "ws://"} {
 		if len(u) > len(prefix) && u[:len(prefix)] == prefix {
@@ -493,3 +950,175 @@ func replaceHost(rawURL, newHost string) string {
 	}
 	return rawURL
 }
+
+// cidrTracker tracks which configured CIDRs have been "hit" by
+// outbound traffic (TUN -> WebSocket). The behaviour differs by mode:
+//
+//   - Proxy mode: each outbound packet's destination IP is matched
+//     against the CIDR list; the first matching CIDR is marked as hit.
+//     Stats() returns the count of hit CIDRs vs total CIDRs.
+//   - Bypass mode: outbound traffic through TUN is, by definition,
+//     traffic that did NOT match any bypass CIDR (bypassed traffic
+//     goes via the physical NIC). We count distinct destination
+//     /24 (v4) or /48 (v6) prefixes seen on TUN as "unmatched
+//     destinations". Stats() returns the total bypass CIDR count
+//     and the unmatched destination count.
+type cidrTracker struct {
+	mode route.Mode
+	mu   sync.RWMutex
+
+	// Proxy mode: pre-parsed CIDR nets + per-CIDR hit flags.
+	// Protected by mu for concurrent AddCIDRs (write) vs Record/Stats
+	// (read). The atomic.Bool hit flags are individually atomic, but
+	// the slices themselves need the lock.
+	v4CIDRs []*net.IPNet
+	v6CIDRs []*net.IPNet
+	v4Hits  []atomic.Bool
+	v6Hits  []atomic.Bool
+
+	// Bypass mode: distinct destination prefix sets.
+	// v4 key = first 3 bytes of dest IP (a /24 prefix).
+	// v6 key = first 6 bytes of dest IP (a /48 prefix).
+	// sync.Map is already goroutine-safe; no lock needed.
+	v4Prefixes sync.Map
+	v6Prefixes sync.Map
+	v4Count    atomic.Int64
+	v6Count    atomic.Int64
+}
+
+// newCIDRTracker creates a tracker for the given routing mode and CIDR
+// list. For full-tunnel mode, a tracker is still created but will
+// report zero totals (no CIDRs configured).
+func newCIDRTracker(mode route.Mode, cidrs []string) *cidrTracker {
+	t := &cidrTracker{mode: mode}
+	if mode == route.ModeFull {
+		return t
+	}
+	t.addCIDRs(cidrs)
+	return t
+}
+
+// AddCIDRs appends additional CIDRs to the tracker (used for
+// after-proxy fetched CIDRs). Existing hit flags are preserved.
+func (t *cidrTracker) AddCIDRs(cidrs []string) {
+	t.addCIDRs(cidrs)
+}
+
+func (t *cidrTracker) addCIDRs(cidrs []string) {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	for _, cidrStr := range cidrs {
+		cidrStr = strings.TrimSpace(cidrStr)
+		if cidrStr == "" {
+			continue
+		}
+		_, ipNet, err := net.ParseCIDR(cidrStr)
+		if err != nil {
+			continue
+		}
+		if ipNet.IP.To4() != nil {
+			t.v4CIDRs = append(t.v4CIDRs, ipNet)
+			t.v4Hits = append(t.v4Hits, atomic.Bool{})
+		} else {
+			t.v6CIDRs = append(t.v6CIDRs, ipNet)
+			t.v6Hits = append(t.v6Hits, atomic.Bool{})
+		}
+	}
+}
+
+// Record inspects an outbound IP packet (from TUN) and updates hit
+// counters. It is called from the TUN -> WebSocket goroutine for every
+// packet. Packets too short to contain an IP header or with an unknown
+// version are silently ignored.
+func (t *cidrTracker) Record(p []byte) {
+	if len(p) < 1 {
+		return
+	}
+	switch p[0] >> 4 {
+	case 4:
+		if len(p) < 20 {
+			return
+		}
+		dst := net.IP(p[16:20])
+		t.recordV4(dst)
+	case 6:
+		if len(p) < 40 {
+			return
+		}
+		dst := net.IP(p[24:40])
+		t.recordV6(dst)
+	}
+}
+
+func (t *cidrTracker) recordV4(dst net.IP) {
+	switch t.mode {
+	case route.ModeProxy:
+		t.mu.RLock()
+		defer t.mu.RUnlock()
+		for i, cidr := range t.v4CIDRs {
+			if !t.v4Hits[i].Load() && cidr.Contains(dst) {
+				t.v4Hits[i].Store(true)
+			}
+		}
+	case route.ModeBypass:
+		key := string(dst.To4()[:3])
+		if _, loaded := t.v4Prefixes.LoadOrStore(key, struct{}{}); !loaded {
+			t.v4Count.Add(1)
+		}
+	}
+}
+
+func (t *cidrTracker) recordV6(dst net.IP) {
+	switch t.mode {
+	case route.ModeProxy:
+		t.mu.RLock()
+		defer t.mu.RUnlock()
+		for i, cidr := range t.v6CIDRs {
+			if !t.v6Hits[i].Load() && cidr.Contains(dst) {
+				t.v6Hits[i].Store(true)
+			}
+		}
+	case route.ModeBypass:
+		v6 := dst.To16()
+		if len(v6) < 6 {
+			return
+		}
+		key := string(v6[:6])
+		if _, loaded := t.v6Prefixes.LoadOrStore(key, struct{}{}); !loaded {
+			t.v6Count.Add(1)
+		}
+	}
+}
+
+// Stats returns the total and hit counts for IPv4 and IPv6 CIDRs.
+//
+// For proxy mode: "hits" = number of CIDRs that have been matched by
+// at least one outbound packet.
+// For bypass mode: "hits" = number of distinct destination prefixes
+// seen on TUN (i.e. unmatched destinations that went through the
+// tunnel because they didn't match any bypass CIDR).
+func (t *cidrTracker) Stats() (v4Total, v4Hits, v6Total, v6Hits int) {
+	t.mu.RLock()
+	defer t.mu.RUnlock()
+	switch t.mode {
+	case route.ModeProxy:
+		v4Total = len(t.v4CIDRs)
+		for i := range t.v4Hits {
+			if t.v4Hits[i].Load() {
+				v4Hits++
+			}
+		}
+		v6Total = len(t.v6CIDRs)
+		for i := range t.v6Hits {
+			if t.v6Hits[i].Load() {
+				v6Hits++
+			}
+		}
+	case route.ModeBypass:
+		v4Total = len(t.v4CIDRs)
+		v4Hits = int(t.v4Count.Load())
+		v6Total = len(t.v6CIDRs)
+		v6Hits = int(t.v6Count.Load())
+	}
+	return
+}

resources/Info.plist

@@ -24,9 +24,9 @@
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
 	<key>CFBundleShortVersionString</key>
-	<string>1.0.0</string>
+	<string>0.3.7</string>
 	<key>CFBundleVersion</key>
-	<string>1</string>
+	<string>0</string>
 	<key>LSMinimumSystemVersion</key>
 	<string>11.0</string>
 	<key>NSHighResolutionCapable</key>

resources/genico/main.go

@@ -0,0 +1,51 @@
+// genico converts resources/icon.png into a Windows .ico file using the
+// PNG-in-ICO format (the PNG bytes are wrapped in a minimal ICO container
+// without decoding/re-encoding). Works on Windows Vista and later.
+//
+// Run: go run resources/genico/main.go
+package main
+
+import (
+	"encoding/binary"
+	"fmt"
+	"os"
+)
+
+func main() {
+	pngData, err := os.ReadFile("resources/icon.png")
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "genico: %v\n", err)
+		os.Exit(1)
+	}
+
+	// ICO header (6 bytes) + one directory entry (16 bytes) = 22 bytes overhead.
+	const headerSize = 6
+	const entrySize = 16
+	dataOffset := uint32(headerSize + entrySize)
+
+	ico := make([]byte, 0, headerSize+entrySize+len(pngData))
+
+	// ICONDIR
+	ico = binary.LittleEndian.AppendUint16(ico, 0) // reserved
+	ico = binary.LittleEndian.AppendUint16(ico, 1) // type = icon
+	ico = binary.LittleEndian.AppendUint16(ico, 1) // count = 1 image
+
+	// ICONDIRENTRY
+	ico = append(ico, 0)                            // width (0 = 256+, actual size in PNG header)
+	ico = append(ico, 0)                            // height (0 = 256+, actual size in PNG header)
+	ico = append(ico, 0)                            // color count (0 = ≥256 colors)
+	ico = append(ico, 0)                            // reserved
+	ico = binary.LittleEndian.AppendUint16(ico, 1)  // planes
+	ico = binary.LittleEndian.AppendUint16(ico, 32) // bit count
+	ico = binary.LittleEndian.AppendUint32(ico, uint32(len(pngData)))
+	ico = binary.LittleEndian.AppendUint32(ico, dataOffset)
+
+	// PNG image data
+	ico = append(ico, pngData...)
+
+	if err := os.WriteFile("resources/icon.ico", ico, 0644); err != nil {
+		fmt.Fprintf(os.Stderr, "genico: %v\n", err)
+		os.Exit(1)
+	}
+	fmt.Println("Generated resources/icon.ico")
+}

resources/lmvpn.rc

@@ -0,0 +1 @@
+LMVPN ICON "resources/icon.ico"