将IP加入黑名单时，同时也会关闭此IP相关的连接

internal/firewalls/firewall_base.go

@@ -0,0 +1,47 @@
+// Copyright 2022 Liuxiangchao iwind.liu@gmail.com. All rights reserved. Official site: https://goedge.cn .
+
+package firewalls
+
+import (
+	"github.com/iwind/TeaGo/types"
+	"strings"
+	"sync"
+	"time"
+)
+
+type BaseFirewall struct {
+	locker        sync.Mutex
+	latestIPTimes []string // [ip@time, ....]
+}
+
+// 检查是否在最近添加过
+func (this *BaseFirewall) checkLatestIP(ip string) bool {
+	this.locker.Lock()
+	defer this.locker.Unlock()
+
+	var expiredIndex = -1
+	for index, ipTime := range this.latestIPTimes {
+		var pieces = strings.Split(ipTime, "@")
+		var oldIP = pieces[0]
+		var oldTimestamp = pieces[1]
+		if types.Int64(oldTimestamp) < time.Now().Unix()-3 /** 3秒外表示过期 **/ {
+			expiredIndex = index
+			continue
+		}
+		if oldIP == ip {
+			return true
+		}
+	}
+
+	if expiredIndex > -1 {
+		this.latestIPTimes = this.latestIPTimes[expiredIndex+1:]
+	}
+
+	this.latestIPTimes = append(this.latestIPTimes, ip+"@"+types.String(time.Now().Unix()))
+	const maxLen = 128
+	if len(this.latestIPTimes) > maxLen {
+		this.latestIPTimes = this.latestIPTimes[1:]
+	}
+
+	return false
+}