refactor: 为SMBGhost插件添加包控制功能

- 在detectVulnerability和gatherSystemInfo方法中添加包控制检查
- 统一错误处理和包计数逻辑
- 确保所有TCP连接遵循发包限制

plugins/services/smbghost.go

@@ -156,11 +156,18 @@ func (p *SmbGhostPlugin) detectVulnerability(ctx context.Context, info *common.H
 	addr := fmt.Sprintf("%s:445", info.Host)
 	timeout := time.Duration(common.Timeout) * time.Second
 
+	// 检查发包限制
+	if canSend, reason := common.CanSendPacket(); !canSend {
+		return false, fmt.Errorf("发包受限: %s", reason)
+	}
+
 	// 建立TCP连接
 	conn, err := common.WrapperTcpWithTimeout("tcp", addr, timeout)
 	if err != nil {
+		common.IncrementTCPFailedPacketCount()
 		return false, fmt.Errorf("连接失败: %v", err)
 	}
+	common.IncrementTCPSuccessPacketCount()
 	defer conn.Close()
 
 	// 设置连接超时
@@ -200,10 +207,17 @@ func (p *SmbGhostPlugin) gatherSystemInfo(ctx context.Context, info *common.Host
 	addr := fmt.Sprintf("%s:445", info.Host)
 	timeout := time.Duration(common.Timeout) * time.Second
 
-	conn, err := common.WrapperTcpWithTimeout("tcp", addr, timeout)
-	if err != nil {
+	// 检查发包限制
+	if canSend, _ := common.CanSendPacket(); !canSend {
 		return ""
 	}
+
+	conn, err := common.WrapperTcpWithTimeout("tcp", addr, timeout)
+	if err != nil {
+		common.IncrementTCPFailedPacketCount()
+		return ""
+	}
+	common.IncrementTCPSuccessPacketCount()
 	defer conn.Close()
 
 	// 发送标准SMB协商请求获取系统信息