Abstract:  In order to improve the perceived quality of the user side of the ITV, when ITV fails, the user can carry out a series of self-diagnosis, including Traceroute, capture test, but to achieve Traceroute and packet-capture functions, the set-top box Root permission must be obtained, but
the Root permission of can not be open the set-top box  to users, users also can not test the ITV fault through the two test schemes. This paper proposes a new method which communicates the application layer with the bottom layer through the Socket without the Root permissions, makes Traceroute and Tcpdump commands be compiled into a binary file to operate on the set-top box. The manufacturers increase service items corresponding to the firmware upgrade, so as to achieve Traceroute and packet-capture functions in non-Root authority, improving the perceived quality of user side.

Key words:  without Root, Socket correspond, Traceroute and Tcpdump, perceived quality