| --- |
| Author: Gábor Szalai |
| Version: 1551-CNL 113 827, Rev. A |
| Date: 2017-04-12 |
| --- |
| = GTP Tunnel Daemon for TTCN-3 Toolset with TITAN, Function Description |
| :author: Gábor Szalai |
| :revnumber: 1551-CNL 113 827, Rev. A |
| :revdate: 2017-04-12 |
| :toc: |
| |
| |
| = Introduction |
| |
| == How to Read this Document |
| |
| This is the Function Specification for the GTP Tunnel Daemon. GTP Tunnel Daemon is developed for the TTCN-3 Toolset with TITAN. This document should be read together with the <<_3,Product Revision Information>>. |
| |
| == Scope |
| |
| The purpose of this document is to specify the content of the GTP Tunnel Daemon. The document is primarily addressed to the end users of the product. Basic knowledge of <<_2,TTCN-3>> and <<_4,TITAN TTCN-3 Test Executor>> is valuable when reading this document. |
| |
| == References |
| |
| 1. [[_1]]3GPP TS 29.060 + |
| General Packet Radio Service (GPRS); GPRS Tunnelling Protocol (GTP) across the Gn and Gp interface |
| |
| 2. [[_2]]ETSI ES 201 873-1 v3.2.1 (2007-02) + |
| The Testing and Test Control Notation version 3; Part 1: Core Language |
| |
| 3. [[_3]]109 21-CNL 113 827-1 Uen + |
| GTP Tunnel Daemon for TTCN-3 Toolset with TITAN, Product Revision Information |
| |
| 4. [[_4]]1/198 17-CRL 113 200/6 Uen + |
| User Guide for the TITAN TTCN-3 Test Executor |
| |
| == Abbreviations |
| |
| SCTP:: Stream Control Transmission Protocol |
| |
| TTCN-3:: Testing and Test Control Notation version 3 |
| |
| == Terminology |
| |
| No specific terminology is used. |
| |
| == System Requirements |
| |
| Protocol modules are a set of TTCN-3 source code files that can be used as part of TTCN-3 test suites only. Hence, GTP Tunnel Daemon alone does not put specific requirements on the system used. However, in order to compile and execute a TTCN-3 test suite using the set of protocol modules, the following system requirements must be satisfied: |
| |
| * TITAN TTCN-3 Test Executor 1.8.pl0.pre2 or higher installed. For installation guide, see <<_2,here>>. |
| * Linux kernel with tun/tap interface enabled. |
| |
| = GTP Tunnel Daemon |
| |
| == Overview |
| |
| The GTP Tunnel Daemon provides a transparent tunnelling for IP traffic over GTP-U tunnel. The parameters of the GTP tunnel are controlled over the control interface of the GTP Tunnel Daemon. |
| |
| The TTCN3 test port for the control interface of the GTP Tunnel Daemon is part of the product. |
| |
| image::images/Picture1.png[] |
| |
| == Installation |
| |
| The set of protocol modules can be used in developing TTCN-3 test suites using any text editor. However, to make the work more efficient, a TTCN-3-enabled text editor is recommended (e.g. nedit, xemacs). Since the SCTP protocol is used as a part of a TTCN-3 test suite, this requires TTCN-3 Test Executor to be installed before the module can be compiled and executed together with other parts of the test suite. For more details on the installation of TTCN-3 Test Executor, see the relevant section of the <<_4,User Guide for the TITAN TTCN-3 Test Executor>>. |
| |
| == Configuration |
| |
| None. |
| |
| = Functional specification |
| |
| == Control test port |
| |
| Provides the control interface of the GTP Tunnel Daemon. |
| |
| Available operations: |
| |
| * `GTP_Tunnel_init`: initializes the control connection towards the daemon |
| * `GTP_Tunnel_create`: creates a GTP tunnel |
| * `GTP_Tunnel_destroy`: destroys the GTP tunnel |
| * `GTP_Tunnel_bye`: gracefully closes the control connection |
| |
| == GTP Tunnel Daemon |
| |
| Handles the tunnelling of IP packets over GTP-U. When started it creates a TUN interface for the IP traffic. The TUN interface works as an ordinary network interface so any kind of IP traffic can use it. |
| |
| Because the TUN interface uses the IP stack of the kernel, any functionality provided by the IP stack is available including: IPv4, IPv6, IPSec, ICMP. |
| |
| The GTP Tunnel Daemon supports multiple GTP tunnels, and multiple TEIDs for one IP address. |
