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TTCN - Router [message #1801624]

Wed, 23 January 2019 13:41

Eclipse User

Hi Elemer,

Does TTCN support router (L3) testing ?

Regards - David

Re: TTCN - Router [message #1801654 is a reply to message #1801624]

Thu, 24 January 2019 03:40

Eclipse User

Hi David,

TTCN-3 as a language is totally generic, universal and agnostic to the nature of the System Under Test; Titan tries to maintain this as much as possible.

Some years ago we have experimented with testing OSPF with TTCN-3/Titan and also with compiling Titan on a router directly for white-box testing of the router software ( of curse the condition for this is the router runs a Linux derivative as OS, but this is often satisfied).
As requirements were more heavily expressed in other areas , we have abandoned this line , but I see no reason why Titan and TTCN-3 could not be used for router testing,
assuming one creates the appropriate protocol modules and test ports.

Best regards
Elemer

Re: TTCN - Router [message #1801705 is a reply to message #1801654]

Thu, 24 January 2019 16:29

Eclipse User

Hi Elemer,

Can this qualify as a protocol module for L2 router ?
https://github.com/eclipse/titan.core/blob/e157c63ddc88b3f822a96cdf018f9533c9f8807c/performance_test/SIPApplibPerfTest/src/EPTF_CLL_TransportIPL2_Definitions.ttcn

Regards - David

Re: TTCN - Router [message #1801731 is a reply to message #1801705]

Fri, 25 January 2019 06:37

Eclipse User

Hi David,

not directly, but certainly you can take inspiration from it.
In broad terms the quoted protocol module was written with the intention of bypassing the TCP/UDP layer of the IP stack offered by the OS;
as such it receives/sends ethernet frames on the southbound interface and receives/sends TCP or UDP messages on the northbound interface.
It also handles ARP , that is translation between MAc and IP addresses.

We don't have ready, off the shelf protocol modules for L2 bridging or L3 routing functionality.

Best regards
Elemer

Re: TTCN - Router [message #1801751 is a reply to message #1801731]

Fri, 25 January 2019 11:06

Eclipse User

Hi Elemer,

Thx. Typically Internet IP routing protocols usually includes the 3 usual suspects: RIP, OSPF and BGP.
We are interesting on the BGP.

Regards - David

[Updated on: Fri, 25 January 2019 11:07] by Moderator

Re: TTCN - Router [message #1802891 is a reply to message #1801751]

Mon, 18 February 2019 09:32

Eclipse User

Hi Elemer,

Would you happen to still have the compiled version and API of OSPF with TTCN-3/Titan that you spoke previously?

If yes...could you send us the tar file and any pertaining doc ?

Thx - David

[Updated on: Mon, 18 February 2019 10:30] by Moderator

Re: TTCN - Router [message #1802925 is a reply to message #1802891]

Tue, 19 February 2019 03:15

Eclipse User

Hi , David,

I'm sorry ; the code has been lost during years of migrations;
however it should not be more than a couple of days' work with RAW encoding.

Best regards
Elemer

Re: TTCN - Router [message #1802950 is a reply to message #1802925]

Tue, 19 February 2019 08:51

Eclipse User

Hi Elemer,

Thx for your response, we found one but it's dated 2010:
http://t3devkit.gforge.inria.fr/doc/userref/userrefch1.html#x2-110001.3
https://gforge.inria.fr/frs/?group_id=587

Regards - David

[Updated on: Tue, 19 February 2019 08:54] by Moderator

Re: TTCN - Router [message #1803492 is a reply to message #1802950]

Fri, 01 March 2019 10:23

Eclipse User

Hi Elemer,

We came across this long discussion on TTCN Titan Testport for socketCAN (https://www.eclipse.org/forums/index.php/m/1745150/?srch=router#msg_1745150).
would it be related to static route ?

Regards - David

Re: TTCN - Router [message #1803552 is a reply to message #1803492]

Mon, 04 March 2019 02:36

Eclipse User

Hi David,

no, I'm afraid that discussion is not related to routing or static routes.

BR

Elemer

Re: TTCN - Router [message #1803987 is a reply to message #1803552]

Thu, 14 March 2019 16:25

Eclipse User

Hi Elemer,

If I were to send a ICMP Echo to the OSPF router, the TTCN-3 structure representing an OSPF packet and test port would be as followed.
would I need to create a similar protocol packet and test ports for BGP ?

Regards - David

type record OSPFPacketType
{
UInt8 Version,
UInt8 Type,
UInt16 PacketLength,
UInt32 RouterID,
UInt32 AreaID,
UInt16 Checksum,
UInt8 InstanceID,
UInt8 Reserved,

octetstring PacketBody
};

// A port type used for communicating with an OSPF router

type port OSPFPort message
{
inout OSPFPacketType;
}

Re: TTCN - Router [message #1804089 is a reply to message #1803987]

Mon, 18 March 2019 03:55

Eclipse User

Hi David,

first , some architectural advice:

it's always a good idea to separate the different protocol stacks:
-you will need at least two such stacks: an ICMP/IP/L2 and an OSPF/IP/L2; this means you will need two PTC's , one implementing ICMP behaviour , with an icmp port translated to LANL2,
and one implementing OSPF behaviour, with an ospf port translated to LANL2;

-for the first you can use the already available ICMP and IP protocol modules and the LANL2 test port
-for the second you will have to write an OSPF protocol module (with RAW codec instructions) , plus use the existing IP PM, and LANL2 test port

If you want to add BGP, you need to implement BGP types ( with RAW) and add a third protocol stack/component similar with the above

You should preferably use types declared in titan.ProtocolModules.COMMON/src/General_Types.ttcn
already decorated with RAW attributes.

The MTC can be used to orchestrate the behaviour of the two(three) components wia internal test ports.

I hope this helps.

BR

Elemer

Re: TTCN - Router [message #1805032 is a reply to message #1804089]

Thu, 04 April 2019 13:10

Eclipse User

Hi Elemer,

While running test cases define in A.cfg, we had also to include test cases from B.cfg in [MODULE_PARAMETERS], otherwise we have a dynamic error.
Is it possible to run test case define in A.cfg without including B.cfg test cases in [MODULE_PARAMETERS] ......As of today, we put both A.cfg and B.cfg test cases in each pertaining [MODULE_PARAMETERS] to avoid dynamic error
when we run the command: ttcn3_start ./l2 ..../CONFIG/ICMP2ETH_n+1.cfg

Regards - David

[Updated on: Thu, 04 April 2019 13:14] by Moderator

Re: TTCN - Router [message #1805062 is a reply to message #1805032]

Fri, 05 April 2019 02:48

Eclipse User

Hi David,

it would be easier to answer your question if I could see what's in your code and config;
however the answer is: yes, it is possible, you need to look at the logs and understand the role of the included parameters.

A generic advice:
Try to run the test cases one by one separately; every test case should work stand-alone, there should be no interference between test cases.
If it is , than that is wrong.
You should separate the test cases from each other; that usually requires a preamble to establish a certain state of the SUT (e.g. login) and a postamble
to take the SUT to a default state (e.g. logout)

I hope this helps

BR

Elemer

Re: TTCN - Router [message #1805582 is a reply to message #1804089]

Wed, 17 April 2019 15:06

Eclipse User

Hi Elemer,

Based on your previous messages, we realized that ProtocolModules.ICMP (ICMP_Types.ttcn) and ICMPv6_Types.ttcn already have some RAW router record types defined:
- ICMP_RouterAdvertisement
- ICMP_RouterSolicitation
- ICMP_RouterAddressEntity

We can borrow them to implement BGP and OPSF protocol in a different branch ProtocolModules.BGP and ProtocolModules.OPSF ?

And add the BGP message header based on RFC 4271 section 4.1 - 4.3

Regards - David

Re: TTCN - Router [message #1805586 is a reply to message #1805582]

Thu, 18 April 2019 03:03

Eclipse User

Hi David,

sure thing, you should reuse as much as possible

BR

Elemer

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