637 lines
18 KiB
Go
637 lines
18 KiB
Go
package job
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import (
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"bufio"
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"encoding/json"
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"io"
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"log"
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"os"
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"os/exec"
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"regexp"
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"runtime"
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"sort"
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"time"
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"sync"
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"crypto/rand"
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"encoding/hex"
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"x-ui/database"
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"x-ui/database/model"
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"x-ui/logger"
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"x-ui/xray"
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"x-ui/web/service"
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)
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// =================================================================
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// 中文注释: 以下是用于实现设备限制功能的核心代码
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// =================================================================
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// ActiveClientIPs 中文注释: 用于在内存中跟踪每个用户的活跃IP (TTL机制)
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// 结构: map[用户email] -> map[IP地址] -> 最后活跃时间
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var ActiveClientIPs = make(map[string]map[string]time.Time)
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var activeClientsLock sync.RWMutex
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// ClientStatus 中文注释: 用于跟踪每个用户的状态（是否因为设备超限而被禁用）
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// 结构: map[用户email] -> 是否被禁用(true/false)
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var ClientStatus = make(map[string]bool)
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var clientStatusLock sync.RWMutex
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// CheckDeviceLimitJob 中文注释: 这是我们的设备限制任务的结构体
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type CheckDeviceLimitJob struct {
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inboundService service.InboundService
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xrayService *service.XrayService
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// 中文注释: 新增 xrayApi 字段，用于持有 Xray API 客户端实例
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xrayApi xray.XrayAPI
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// lastPosition 中文注释: 用于记录上次读取 access.log 的位置，避免重复读取
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lastPosition int64
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}
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// RandomUUID 中文注释: 新增一个辅助函数，用于生成一个随机的 UUID
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func RandomUUID() string {
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uuid := make([]byte, 16)
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rand.Read(uuid)
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uuid[6] = (uuid[6] & 0x0f) | 0x40
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uuid[8] = (uuid[8] & 0x3f) | 0x80
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return hex.EncodeToString(uuid[0:4]) + "-" + hex.EncodeToString(uuid[4:6]) + "-" + hex.EncodeToString(uuid[6:8]) + "-" + hex.EncodeToString(uuid[8:10]) + "-" + hex.EncodeToString(uuid[10:16])
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}
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// NewCheckDeviceLimitJob 中文注释: 创建一个新的任务实例
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func NewCheckDeviceLimitJob(xrayService *service.XrayService) *CheckDeviceLimitJob {
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return &CheckDeviceLimitJob{
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xrayService: xrayService,
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// 中文注释: 初始化 xrayApi 字段
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xrayApi: xray.XrayAPI{},
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}
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}
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// Run 中文注释: 定时任务的主函数，每次定时器触发时执行
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func (j *CheckDeviceLimitJob) Run() {
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// 中文注释: 检查 xray 是否正在运行，如果xray没运行，则无需执行此任务
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if !j.xrayService.IsXrayRunning() {
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return
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}
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// 1. 清理过期的IP
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j.cleanupExpiredIPs()
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// 2. 解析新的日志并更新IP列表
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j.parseAccessLog()
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// 3. 检查所有用户的设备限制状态
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j.checkAllClientsLimit()
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}
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// cleanupExpiredIPs 中文注释: 清理长时间不活跃的IP
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func (j *CheckDeviceLimitJob) cleanupExpiredIPs() {
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activeClientsLock.Lock()
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defer activeClientsLock.Unlock()
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now := time.Now()
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// 中文注释: 活跃判断窗口(TTL): 近3分钟内出现过就算“活跃”
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const activeTTL = 3 * time.Minute
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for email, ips := range ActiveClientIPs {
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for ip, lastSeen := range ips {
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// 中文注释: 如果一个IP超过3分钟没有新的连接日志，我们就认为它已经下线
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if now.Sub(lastSeen) > activeTTL {
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delete(ActiveClientIPs[email], ip)
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}
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}
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// 中文注释: 如果一个用户的所有IP都下线了，就从大Map中移除这个用户，节省内存
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if len(ActiveClientIPs[email]) == 0 {
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delete(ActiveClientIPs, email)
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}
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}
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}
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// parseAccessLog 中文注释: 解析 xray access log 来获取最新的用户IP信息
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func (j *CheckDeviceLimitJob) parseAccessLog() {
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logPath, err := xray.GetAccessLogPath()
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if err != nil || logPath == "none" || logPath == "" {
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return
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}
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file, err := os.Open(logPath)
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if err != nil {
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return
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}
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defer file.Close()
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// 中文注释: 移动到上次读取结束的位置，实现增量读取
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file.Seek(j.lastPosition, 0)
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scanner := bufio.NewScanner(file)
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// 中文注释: 使用正则表达式从日志行中提取 email 和 IP
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emailRegex := regexp.MustCompile(`email: ([^ ]+)`)
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ipRegex := regexp.MustCompile(`from (?:tcp:|udp:)?\[?([0-9a-fA-F\.:]+)\]?:\d+ accepted`)
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activeClientsLock.Lock()
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defer activeClientsLock.Unlock()
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now := time.Now()
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for scanner.Scan() {
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line := scanner.Text()
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emailMatch := emailRegex.FindStringSubmatch(line)
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ipMatch := ipRegex.FindStringSubmatch(line)
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if len(emailMatch) > 1 && len(ipMatch) > 1 {
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email := emailMatch[1]
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ip := ipMatch[1]
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if ip == "127.0.0.1" || ip == "::1" {
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continue
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}
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if _, ok := ActiveClientIPs[email]; !ok {
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ActiveClientIPs[email] = make(map[string]time.Time)
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}
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ActiveClientIPs[email][ip] = now
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}
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}
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currentPosition, err := file.Seek(0, os.SEEK_END)
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if err == nil {
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if currentPosition < j.lastPosition {
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j.lastPosition = 0
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} else {
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j.lastPosition = currentPosition
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}
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}
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}
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// checkAllClientsLimit 中文注释: 核心功能，检查所有用户，对超限的执行封禁，对恢复的执行解封
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func (j *CheckDeviceLimitJob) checkAllClientsLimit() {
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db := database.GetDB()
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var inbounds []*model.Inbound
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// 中文注释: 这里仅查询启用了设备限制(device_limit > 0)并且自身是开启状态的入站规则
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db.Where("device_limit > 0 AND enable = ?", true).Find(&inbounds)
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if len(inbounds) == 0 {
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return
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}
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// 中文注释: 获取 API 端口。如果端口为0 (说明Xray未完全启动或有问题)，则直接返回
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apiPort := j.xrayService.GetApiPort()
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if apiPort == 0 {
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return
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}
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// 中文注释: 使用获取到的端口号初始化 API 客户端
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j.xrayApi.Init(apiPort)
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defer j.xrayApi.Close()
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// 中文注释: 优化 - 在一次循环中同时获取 tag 和 protocol
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inboundInfoMap := make(map[int]struct {
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Limit int
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Tag string
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Protocol model.Protocol
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})
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for _, inbound := range inbounds {
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inboundInfoMap[inbound.Id] = struct {
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Limit int
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Tag string
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Protocol model.Protocol
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}{Limit: inbound.DeviceLimit, Tag: inbound.Tag, Protocol: inbound.Protocol}
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}
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activeClientsLock.RLock()
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clientStatusLock.Lock()
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defer activeClientsLock.RUnlock()
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defer clientStatusLock.Unlock()
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// 第一步: 处理当前在线的用户
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for email, ips := range ActiveClientIPs {
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traffic, err := j.inboundService.GetClientTrafficByEmail(email)
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if err != nil || traffic == nil {
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continue
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}
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info, ok := inboundInfoMap[traffic.InboundId]
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if !ok || info.Limit <= 0 {
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continue
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}
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isBanned := ClientStatus[email]
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activeIPCount := len(ips)
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// 调用封禁函数
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if activeIPCount > info.Limit && !isBanned {
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// 中文注释: 调用封禁函数时，传入当前的IP数用于记录日志
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j.banUser(email, activeIPCount, &info)
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}
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// 调用解封函数
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if activeIPCount <= info.Limit && isBanned {
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// 中文注释: 调用解封函数时，传入当前的IP数用于记录日志
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j.unbanUser(email, activeIPCount, &info)
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}
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}
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// 第二步: 专门处理那些“已被封禁”但“已不在线”的用户，为他们解封
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for email, isBanned := range ClientStatus {
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if !isBanned {
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continue
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}
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if _, online := ActiveClientIPs[email]; !online {
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traffic, err := j.inboundService.GetClientTrafficByEmail(email)
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if err != nil || traffic == nil {
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continue
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}
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info, ok := inboundInfoMap[traffic.InboundId]
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if !ok {
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continue
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}
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logger.Infof("已封禁用户 %s 已完全下线，执行解封操作。", email)
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// 调用解封函数，这种情况下：活跃IP数为0，我们直接传入0用于记录日志
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j.unbanUser(email, 0, &info)
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}
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}
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}
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// banUser 中文注释: 封装的封禁用户函数；IP数量超限，且用户当前未被封禁 -> 执行封禁 (UUID 替换)
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func (j *CheckDeviceLimitJob) banUser(email string, activeIPCount int, info *struct {
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Limit int
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Tag string
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Protocol model.Protocol
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}) {
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// =================================================================
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// 这一行代码是整个解封逻辑的灵魂！
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// GetClientByEmail 函数会去查询您的数据库 (x-ui.db)，
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// 找到 `inbounds` 表，解析其中的 `settings` 字段，并从中去，
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// 读取出您最初设置的、最原始、最正确的用户信息（包括最原始的UUID），
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// 然后把它赋值给 `client` 这个变量；此时，`client` 变量就持有了那个“老链接”的正确原始 UUID。
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// =================================================================
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_, client, err := j.inboundService.GetClientByEmail(email)
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if err != nil || client == nil {
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return
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}
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logger.Infof("〔设备限制〕超限：用户 %s. 限制: %d, 当前活跃: %d. 执行封禁掐网。", email, info.Limit, activeIPCount)
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// 中文注释: 步骤一：先从 Xray-Core 中删除该用户。
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j.xrayApi.RemoveUser(info.Tag, email)
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// =================================================================
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// 中文注释: 增加 5000 毫秒延时，解决竞态条件问题
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time.Sleep(5000 * time.Millisecond)
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// =================================================================
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// 中文注释: 创建一个带有随机UUID/Password的临时客户端配置用于“封禁”
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tempClient := *client
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// 适用于 VMess/VLESS
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if tempClient.ID != "" { tempClient.ID = RandomUUID() }
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// 适用于 Trojan/Shadowsocks/Socks
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if tempClient.Password != "" { tempClient.Password = RandomUUID() }
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var clientMap map[string]interface{}
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clientJson, _ := json.Marshal(tempClient)
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json.Unmarshal(clientJson, &clientMap)
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// 中文注释: 步骤二：将这个带有错误UUID/Password的临时用户添加回去。
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// 客户端持有的还是旧的UUID，自然就无法通过验证，从而达到了“封禁”的效果。
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err = j.xrayApi.AddUser(string(info.Protocol), info.Tag, clientMap)
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if err != nil {
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logger.Warningf("通过API封禁用户 %s 失败: %v", email, err)
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} else {
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// 中文注释: 封禁成功后，在内存中标记该用户为“已封禁”状态。
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ClientStatus[email] = true
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}
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}
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// unbanUser 中文注释: 封装的解封用户函数；IP数量已恢复正常，但用户处于封禁状态 -> 执行解封 (恢复原始 UUID)
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func (j *CheckDeviceLimitJob) unbanUser(email string, activeIPCount int, info *struct {
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Limit int
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Tag string
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Protocol model.Protocol
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}) {
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_, client, err := j.inboundService.GetClientByEmail(email)
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if err != nil || client == nil {
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return
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}
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logger.Infof("〔设备数量〕已恢复：用户 %s. 限制: %d, 当前活跃: %d. 执行解封/恢复用户。", email, info.Limit, activeIPCount)
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// 中文注释: 步骤一：先从 Xray-Core 中删除用于“封禁”的那个临时用户。
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j.xrayApi.RemoveUser(info.Tag, email)
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// =================================================================
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// 中文注释: 同样增加 5000 毫秒延时，确保解封操作的稳定性
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time.Sleep(5000 * time.Millisecond)
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// =================================================================
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var clientMap map[string]interface{}
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clientJson, _ := json.Marshal(client)
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json.Unmarshal(clientJson, &clientMap)
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// 中文注释: 步骤二：将数据库中原始的、正确的用户信息重新添加回 Xray-Core，从而实现“解封”。
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err = j.xrayApi.AddUser(string(info.Protocol), info.Tag, clientMap)
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if err != nil {
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logger.Warningf("通过API恢复用户 %s 失败: %v", email, err)
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} else {
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// 中文注释: 解封成功后，从内存中移除该用户的“已封禁”状态标记。
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delete(ClientStatus, email)
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}
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}
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type CheckClientIpJob struct {
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lastClear int64
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disAllowedIps []string
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}
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var job *CheckClientIpJob
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func NewCheckClientIpJob() *CheckClientIpJob {
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job = new(CheckClientIpJob)
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return job
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}
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func (j *CheckClientIpJob) Run() {
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if j.lastClear == 0 {
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j.lastClear = time.Now().Unix()
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}
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shouldClearAccessLog := false
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iplimitActive := j.hasLimitIp()
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f2bInstalled := j.checkFail2BanInstalled()
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isAccessLogAvailable := j.checkAccessLogAvailable(iplimitActive)
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if isAccessLogAvailable {
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if runtime.GOOS == "windows" {
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if iplimitActive {
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shouldClearAccessLog = j.processLogFile()
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}
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} else {
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if iplimitActive {
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if f2bInstalled {
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shouldClearAccessLog = j.processLogFile()
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} else {
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if !f2bInstalled {
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logger.Warning("[LimitIP] Fail2Ban is not installed, Please install Fail2Ban from the x-ui bash menu.")
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}
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}
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}
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}
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}
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if shouldClearAccessLog || (isAccessLogAvailable && time.Now().Unix()-j.lastClear > 3600) {
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j.clearAccessLog()
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}
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}
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func (j *CheckClientIpJob) clearAccessLog() {
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logAccessP, err := os.OpenFile(xray.GetAccessPersistentLogPath(), os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0o644)
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j.checkError(err)
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defer logAccessP.Close()
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accessLogPath, err := xray.GetAccessLogPath()
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j.checkError(err)
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file, err := os.Open(accessLogPath)
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j.checkError(err)
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defer file.Close()
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_, err = io.Copy(logAccessP, file)
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j.checkError(err)
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err = os.Truncate(accessLogPath, 0)
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j.checkError(err)
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j.lastClear = time.Now().Unix()
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}
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func (j *CheckClientIpJob) hasLimitIp() bool {
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db := database.GetDB()
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var inbounds []*model.Inbound
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err := db.Model(model.Inbound{}).Find(&inbounds).Error
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if err != nil {
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return false
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}
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for _, inbound := range inbounds {
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if inbound.Settings == "" {
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continue
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}
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settings := map[string][]model.Client{}
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json.Unmarshal([]byte(inbound.Settings), &settings)
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clients := settings["clients"]
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for _, client := range clients {
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limitIp := client.LimitIP
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if limitIp > 0 {
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return true
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}
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}
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}
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return false
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}
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func (j *CheckClientIpJob) processLogFile() bool {
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ipRegex := regexp.MustCompile(`from (?:tcp:|udp:)?\[?([0-9a-fA-F\.:]+)\]?:\d+ accepted`)
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emailRegex := regexp.MustCompile(`email: (.+)$`)
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accessLogPath, _ := xray.GetAccessLogPath()
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file, _ := os.Open(accessLogPath)
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defer file.Close()
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inboundClientIps := make(map[string]map[string]struct{}, 100)
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scanner := bufio.NewScanner(file)
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for scanner.Scan() {
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line := scanner.Text()
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ipMatches := ipRegex.FindStringSubmatch(line)
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if len(ipMatches) < 2 {
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continue
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}
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ip := ipMatches[1]
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if ip == "127.0.0.1" || ip == "::1" {
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continue
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}
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|
||
emailMatches := emailRegex.FindStringSubmatch(line)
|
||
if len(emailMatches) < 2 {
|
||
continue
|
||
}
|
||
email := emailMatches[1]
|
||
|
||
if _, exists := inboundClientIps[email]; !exists {
|
||
inboundClientIps[email] = make(map[string]struct{})
|
||
}
|
||
inboundClientIps[email][ip] = struct{}{}
|
||
}
|
||
|
||
shouldCleanLog := false
|
||
for email, uniqueIps := range inboundClientIps {
|
||
|
||
ips := make([]string, 0, len(uniqueIps))
|
||
for ip := range uniqueIps {
|
||
ips = append(ips, ip)
|
||
}
|
||
sort.Strings(ips)
|
||
|
||
clientIpsRecord, err := j.getInboundClientIps(email)
|
||
if err != nil {
|
||
j.addInboundClientIps(email, ips)
|
||
continue
|
||
}
|
||
|
||
shouldCleanLog = j.updateInboundClientIps(clientIpsRecord, email, ips) || shouldCleanLog
|
||
}
|
||
|
||
return shouldCleanLog
|
||
}
|
||
|
||
func (j *CheckClientIpJob) checkFail2BanInstalled() bool {
|
||
cmd := "fail2ban-client"
|
||
args := []string{"-h"}
|
||
err := exec.Command(cmd, args...).Run()
|
||
return err == nil
|
||
}
|
||
|
||
func (j *CheckClientIpJob) checkAccessLogAvailable(iplimitActive bool) bool {
|
||
accessLogPath, err := xray.GetAccessLogPath()
|
||
if err != nil {
|
||
return false
|
||
}
|
||
|
||
if accessLogPath == "none" || accessLogPath == "" {
|
||
if iplimitActive {
|
||
logger.Warning("[LimitIP] Access log path is not set, Please configure the access log path in Xray configs.")
|
||
}
|
||
return false
|
||
}
|
||
|
||
return true
|
||
}
|
||
|
||
func (j *CheckClientIpJob) checkError(e error) {
|
||
if e != nil {
|
||
logger.Warning("client ip job err:", e)
|
||
}
|
||
}
|
||
|
||
func (j *CheckClientIpJob) getInboundClientIps(clientEmail string) (*model.InboundClientIps, error) {
|
||
db := database.GetDB()
|
||
InboundClientIps := &model.InboundClientIps{}
|
||
err := db.Model(model.InboundClientIps{}).Where("client_email = ?", clientEmail).First(InboundClientIps).Error
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
return InboundClientIps, nil
|
||
}
|
||
|
||
func (j *CheckClientIpJob) addInboundClientIps(clientEmail string, ips []string) error {
|
||
inboundClientIps := &model.InboundClientIps{}
|
||
jsonIps, err := json.Marshal(ips)
|
||
j.checkError(err)
|
||
|
||
inboundClientIps.ClientEmail = clientEmail
|
||
inboundClientIps.Ips = string(jsonIps)
|
||
|
||
db := database.GetDB()
|
||
tx := db.Begin()
|
||
|
||
defer func() {
|
||
if err == nil {
|
||
tx.Commit()
|
||
} else {
|
||
tx.Rollback()
|
||
}
|
||
}()
|
||
|
||
err = tx.Save(inboundClientIps).Error
|
||
if err != nil {
|
||
return err
|
||
}
|
||
return nil
|
||
}
|
||
|
||
func (j *CheckClientIpJob) updateInboundClientIps(inboundClientIps *model.InboundClientIps, clientEmail string, ips []string) bool {
|
||
jsonIps, err := json.Marshal(ips)
|
||
if err != nil {
|
||
logger.Error("failed to marshal IPs to JSON:", err)
|
||
return false
|
||
}
|
||
|
||
inboundClientIps.ClientEmail = clientEmail
|
||
inboundClientIps.Ips = string(jsonIps)
|
||
|
||
inbound, err := j.getInboundByEmail(clientEmail)
|
||
if err != nil {
|
||
logger.Errorf("failed to fetch inbound settings for email %s: %s", clientEmail, err)
|
||
return false
|
||
}
|
||
|
||
if inbound.Settings == "" {
|
||
logger.Debug("wrong data:", inbound)
|
||
return false
|
||
}
|
||
|
||
settings := map[string][]model.Client{}
|
||
json.Unmarshal([]byte(inbound.Settings), &settings)
|
||
clients := settings["clients"]
|
||
shouldCleanLog := false
|
||
j.disAllowedIps = []string{}
|
||
|
||
logIpFile, err := os.OpenFile(xray.GetIPLimitLogPath(), os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0644)
|
||
if err != nil {
|
||
logger.Errorf("failed to open IP limit log file: %s", err)
|
||
return false
|
||
}
|
||
defer logIpFile.Close()
|
||
log.SetOutput(logIpFile)
|
||
log.SetFlags(log.LstdFlags)
|
||
|
||
for _, client := range clients {
|
||
if client.Email == clientEmail {
|
||
limitIp := client.LimitIP
|
||
|
||
if limitIp > 0 && inbound.Enable {
|
||
shouldCleanLog = true
|
||
|
||
if limitIp < len(ips) {
|
||
j.disAllowedIps = append(j.disAllowedIps, ips[limitIp:]...)
|
||
for i := limitIp; i < len(ips); i++ {
|
||
log.Printf("[LIMIT_IP] Email = %s || SRC = %s", clientEmail, ips[i])
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
sort.Strings(j.disAllowedIps)
|
||
|
||
if len(j.disAllowedIps) > 0 {
|
||
logger.Debug("disAllowedIps:", j.disAllowedIps)
|
||
}
|
||
|
||
db := database.GetDB()
|
||
err = db.Save(inboundClientIps).Error
|
||
if err != nil {
|
||
logger.Error("failed to save inboundClientIps:", err)
|
||
return false
|
||
}
|
||
|
||
return shouldCleanLog
|
||
}
|
||
|
||
func (j *CheckClientIpJob) getInboundByEmail(clientEmail string) (*model.Inbound, error) {
|
||
db := database.GetDB()
|
||
inbound := &model.Inbound{}
|
||
|
||
err := db.Model(&model.Inbound{}).Where("settings LIKE ?", "%"+clientEmail+"%").First(inbound).Error
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
|
||
return inbound, nil
|
||
}
|