The Design and Implementation of Distributed SIP Analyzer

• Main Authors: Ghung Kuo Lin, 鍾國麟
• Other Authors: 潘仁義
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/67516733100503910149

碩士 === 國立中正大學 === 通訊工程研究所 === 92 === Internet has already established itself as the preeminent network for data, commercial transactions and audio-video distribution. Nowadays the growing of Voice over Internet Protocol (VoIP) has been faster and Internet telephone becomes a future trend for telecommunications. Several VoIP call signaling protocols have hence been developed. These popular protocols, for instance, are IETF’s Session Initiation Protocol (SIP) and ITU-T’s H.323 protocol. One of the main drivers for this trend was the decision of Third Generation Partnership Program (3GPP), which in the year 2000 has selected SIP as call control protocol for 3G IP-based mobile networks. While researching and developing various kinds of communication protocols, researchers could utilize network protocol analyzers to debug and monitor operations of these protocols. There are currently a lot of analyzers on the market (e.g., NetXray, Ethereal and so forth) but there is no open-sourced analyzer dedicated to SIP protocol, which is extensible and scalable. Besides, in the Internet or 3G environments, SIP messages will be routed by SIP proxies on different LANs. Using a standalone analyzer cannot monitor the whole SIP message flow. In this thesis, we study a solution to this problem, and design a distributed framework of SIP analyzer. Finally we implement an open-sourced SIP analyzer offering essential functions such as capturing SIP packets, analyzing SIP messages and providing a web interface for clients.