feat: 实现第三层 TUN VPN 服务,支持后台 IP 分配
- 新增 TUN 设备层(water 库),分 linux/darwin 平台配置 IP/路由/MTU - 实现 IP 分配管理:动态池自动分配 + 按用户静态预留,支持热更新 - 实现 PacketSwitch 共享 TUN 包转发:源 IP 防伪、按目的 IP 查表转发、allow-c2c - 重写隧道:自研简化 WS 协议(文本帧 JSON 控制 init/ready,二进制帧=原始 IP 包) - VpnService 单例管理 TUN 生命周期,子网变更踢线重建,预留增删热更新 - 新增 vpn_settings/vpn_reservations 表,AutoMigrate + 默认设置 seed - 新增 Admin API:settings 读写、status、clients、reservations CRUD - 前端新增 VpnView(/admin/vpn):状态面板/设置表单/在线客户端/静态预留 - main.go 启动时按 DB 设置初始化 VPN 服务
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package model
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import "time"
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const VpnSettingSingletonID = 1
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type VpnSetting struct {
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ID uint `gorm:"primaryKey"`
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Enabled bool `gorm:"default:false"`
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Subnet string `gorm:"size:64;not null"`
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MTU int `gorm:"default:1420"`
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InterfaceName string `gorm:"size:16"`
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AllowClientToClient bool `gorm:"default:false"`
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DoLocalIPConfig bool `gorm:"default:true"`
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DoRemoteIPConfig bool `gorm:"default:true"`
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UpdatedAt time.Time
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}
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func (VpnSetting) TableName() string {
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return "vpn_settings"
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}
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type VpnReservation struct {
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ID uint `gorm:"primaryKey;autoIncrement"`
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UserID uint `gorm:"uniqueIndex;not null"`
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IPAddress string `gorm:"size:64;uniqueIndex;not null"`
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CreatedAt time.Time `gorm:"autoCreateTime"`
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}
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func (VpnReservation) TableName() string {
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return "vpn_reservations"
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}
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