Design and implementation of SIP-based VoIP interception model
Rui Chen · Journal of Chongqing University of Posts and Telecommunications · 2010
In order to meet the needs of monitoring VoIP by functional departments legally,based on the session initiation protocol features analysis,the traffic identification methodology was expounded based on SIP,the algorithm of extracting the dynamic conversation and the flow of network interception in details.A design of interception model based on SIP was put forward,in which the various functional modules were described in detail.This Model was also implemented on Linux with libpcap library.Experimentation shows that the model can effectively identify the VoIP traffic.