将IP加入黑名单时，同时也会关闭此IP相关的连接

internal/firewalls/firewall_nftables.go

@@ -7,6 +7,7 @@ package firewalls
 import (
 	"bytes"
 	"errors"
+	"github.com/TeaOSLab/EdgeNode/internal/conns"
 	teaconst "github.com/TeaOSLab/EdgeNode/internal/const"
 	"github.com/TeaOSLab/EdgeNode/internal/events"
 	"github.com/TeaOSLab/EdgeNode/internal/firewalls/nftables"
@@ -100,6 +101,8 @@ func NewNFTablesFirewall() (*NFTablesFirewall, error) {
 }
 
 type NFTablesFirewall struct {
+	BaseFirewall
+
 	conn    *nftables.Conn
 	isReady bool
 	version string
@@ -344,6 +347,14 @@ func (this *NFTablesFirewall) DropSourceIP(ip string, timeoutSeconds int, async
 		return errors.New("invalid ip '" + ip + "'")
 	}
 
+	// 避免短时间内重复添加
+	if this.checkLatestIP(ip) {
+		return nil
+	}
+
+	// 尝试关闭连接
+	conns.SharedMap.CloseIPConns(ip)
+
 	if async {
 		select {
 		case this.dropIPQueue <- &blockIPItem{
@@ -357,6 +368,9 @@ func (this *NFTablesFirewall) DropSourceIP(ip string, timeoutSeconds int, async
 		return nil
 	}
 
+	// 再次尝试关闭连接
+	defer conns.SharedMap.CloseIPConns(ip)
+
 	if strings.Contains(ip, ":") { // ipv6
 		if this.denyIPv6Set == nil {
 			return errors.New("ipv6 ip set is nil")
@@ -433,3 +447,35 @@ func (this *NFTablesFirewall) readVersion(nftPath string) string {
 	}
 	return versionMatches[1]
 }
+
+// 检查是否在最近添加过
+func (this *NFTablesFirewall) existLatestIP(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
+}