计算机科学
网络数据包
数据包分析器
处理延迟
数据包分段
决策树
导线
链路状态包
计算机网络
深包检验
统计分类
网络安全
网络处理器
传输延迟
数据包生成器
数据挖掘
人工智能
大地测量学
地理
摘要
Network packet classification is an important technique widely used in routers, firewalls and intrusion detection systems, and it plays an important role in network security. Many algorithms have been proposed to accelerate packet classification, such as various decision-tree based algorithms. However, each time a packet arrives, it is required to traverse decision tree to find matched rule in lead nodes, which is not efficient for online packet classification. Based on this observation, this paper proposes a flow-level packet classification method using flow table and decision tree, called FTDT. FTDT classifies packet according to the flow it belongs to, which is applicable to real-time packet classification. The proposed method is implemented in Tilera-gx36 multi-core network processor. Moreover, multi-thread technology is employed to design parallel packet classification scheme to accelerate packet classification. We tested our method with classbench rule set and campus rule set. Experiment results showed that FTDT had superior throughput compared with Hyper cuts.
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