基于STUN协议的NAT穿透技术通讯效率优化研究
四川师范大学, 计算机科学学院, 四川成都 610101
| 摘 要： | NAT（Network Address Translator）技术虽然解决了IP地址短缺的问题，但该技术会阻碍主机之间进行P2P（Peer-to-Peer）通信，NAT穿透就是根据设备的映射规则，通过技术手段找出一种能让外部数据报通过NAT设备的方法，从而建立稳定的P2P连接。为了保证P2P网络内的节点完成高质量通信，本文对整个P2P通信过程展开研究，针对NAT类型检测过程复杂繁琐和穿透过程成功率较低等问题，提出一种基于STUN（Simple Traversal of UDP Through NATs）协议穿透的优化策略。该策略通过重新划分NAT类型、改进NAT类型检测方法、引入网络状态检测算法和优化通信流程等措施，保障P2P网络中各节点之间顺畅、高质量完成通信。实验结果表明，本文提出的基于STUN协议的NAT穿透策略具有更低的资源消耗、较强的抗干扰能力和较高的穿透成功率，避免服务器出现性能瓶颈，为整个通信过程提供高质量网络服务。 |
| 关 键 词： | P2P; NAT类型检测; STUN; 网络状态检测算法; NAT穿透 |
| DOI： | 10.57237/j.cst.2023.02.005 |
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收稿日期: 2023-02-28
接受日期: 2023-04-15
在线出版日期: 2023-04-25
Research on Optimizing the Communication Efficiency of NAT Penetration Technology Based on STUN Protocol
School of Computer Science, Sichuan Normal University, Chengdu 610101, China
| Abstract: | NAT (Network Address Translator) technology solves the problem of IP address shortage, but this technology can prevent P2P (Peer-to-Peer) communication between hosts. NAT penetration is the technical means to find a way to allow external datagrams to pass through the NAT device according to the mapping rules of the device, thus establishing a stable P2P connection. In order to ensure that the nodes in a P2P network complete high-quality communication, this paper investigates the entire P2P communication process and proposes an optimisation strategy based on STUN (Simple Traversal of UDP Through NATs) protocol penetration to address the problems of complex and tedious NAT type detection process and low success rate of the penetration process. By reclassifying NAT types, improving NAT type detection methods, introducing network state detection algorithms and optimising the communication flow, the strategy ensures smooth and high-quality communication between nodes in a P2P network. The experimental results show that the STUN protocol-based NAT penetration strategy proposed in this paper has lower resource consumption, stronger anti-interference capability and higher penetration success rate, avoiding performance bottlenecks in the server and providing high-quality network services for the whole communication process. |
| Keywords: | P2P; NAT Type Detection; STUN; Network State Detection Algorithm; NAT Penetration |
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