【摘要】 TURN协议是一种穿越对称NAT的技术。以RFC3489技术为基础,对TURN协议草案进行了深入研究与分析,并在此基础上,改进和简化了草案中存放动态分配地址的地址映射表结构,设计了TURN技术的工作方式和应用模型。然后,借鉴了STUN方式的设计思想,设计并实现了TURN服务器原型系统,解决了SIPUA在STUN等方式下不能穿越对称性NAT问题。更多还原

【Abstract】 TURN protocol is a technique for simple traversal of UDP through NAT. On the basis of RFC3489, the draft for TURN protocol was researched and analyzed in detail. Its address translation table was modified and simplified, which stored dynamic allocated addresses, and the working mode and application model of TURN technology were designed. Then, consulted STUN design ideas, a prototype system of TURN server was designed and implemented, which solved the problem that SIP UA can’t traverse symmetric NAT by STUN.更多还原