osmocom-net-gprs October 2018

osmocom-net-gprs@lists.osmocom.org

7 participants
7 discussions

RFC: unit tests for kernel GTP module
by Harald Welte 01 Jan '26

01 Jan '26

Dear GTP-interested folks, I would love to somehow get towards some degree of unit testing (or even "continuous integration") for teh kernel GTP code. We currently have the original code in the kernel, we had some recent small fixes and now are getting more patches into place. With relatively few active users out there (and probably none of them in production yet), it's particularly easy to introduce regressions while working on the code. Also, having tested new code even against a test set with limited covrage could help to get more confidence in new patches and thus get them merged sooner. Using tools like sgsnemu of OpenGGSN and the command line tools included in libgtpnl, it should be possibel to cook up some scripts for testing. Even the most basic set of tests would be an improvement over what we have now. One could also think about pcap replay to test with hand-crafted or real-world packets from other GTP implementations. As much as I'd like to put something like this into place myself, I don't think I will be able to work much on this in the near future. The GTP module at this point is a pure hobby and contrary to some years ago while I started it, I don't have any contract work in the GTP area at this point, so other projects currently unfortunately get more attention. So in case somebody among the GTP-interested parties (Travelping, OAI, ...) would want to do something in terms of testing, I'd be more than happy if somebody would step ahead. Otherwise it's all just vapourware going to end up on my ever-growing TODO list :/ Also, if netdev folks have some ideas/pointers about possible frameworks/tools for this kind of testing [it must exist for at least some other kernel networking code?]: Please let me know. I'd be interested to have a look if there's something that can be used as a basis (starting network namespaces, sending/transmitting packets, test case startup/teardown, ...) My "old school" approach would have been to start one or multiple user-mode-linux kernels (those that are to be tested), and then have scripts that set up a gtp socket and gtp tunnels via the libgtp command line tools, and throw packets at that. But I'm sure there must be quite powerful frameworks for that kind of testing in the 21st century? How do other tunneling implementations handle this? Regards, Harald -- - Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

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Can you tell me how to compile and install libgtpnl?
by luo 06 Dec '18

06 Dec '18

hello,Please forgive my childishness,Can you tell me how to compile and install libgtpnl?thanks I saw that you wrote the libgtpnl project on github, but there is no readme above.

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[ASK version support GPRS for USRP ]
by Dzakwan Falih 31 Oct '18

31 Oct '18

Hi semua, saya memiliki pertanyaan: 1. Versi berapa yang cocok untuk membangun layanan GPRS.? 2. bagaimana jika saya ingin menginstall GPRS pada satu host bagaimana contoh konfigurasinya, saya sudah membaca manualnya kurang paham. . Hormat Saya, [photo] Muhammad Dzakwan Falih dzakwanfalih.wordpress.com<http://dzakwanfalih.wordpress.com> [https://s3.amazonaws.com/images.wisestamp.com/social_icons/square/facebook.…]<http://www.facebook.com/dzakwan.pilot> [https://s3.amazonaws.com/images.wisestamp.com/social_icons/square/linkedin.…] <http://www.linkedin.com/in/muhammad-dzakwan-falih-2ab30612a/> [https://s3.amazonaws.com/images.wisestamp.com/social_icons/square/twitter.p…] <http://twitter.com/Dz4kwan> [https://s3.amazonaws.com/images.wisestamp.com/social_icons/square/instagram…] <http://www.instagram.com/supernode/>

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[ASK : Version for build GPRS ]
by Dzakwan Falih 30 Oct '18

30 Oct '18

Sorry, I made a mistake in posting. to be honest I am first time using the mailing list Hi all, I have a question: 1. how many Versions suitable for constructing GPRS service.? 2. What if I want to install GPRS on a single host configuration, examples of how I've been reading the manual is less familiar. Hormat Saya, [photo] Muhammad Dzakwan Falih dzakwanfalih.wordpress.com<http://dzakwanfalih.wordpress.com> [https://s3.amazonaws.com/images.wisestamp.com/social_icons/square/facebook.…]<http://www.facebook.com/dzakwan.pilot> [https://s3.amazonaws.com/images.wisestamp.com/social_icons/square/linkedin.…] <http://www.linkedin.com/in/muhammad-dzakwan-falih-2ab30612a/> [https://s3.amazonaws.com/images.wisestamp.com/social_icons/square/twitter.p…] <http://twitter.com/Dz4kwan> [https://s3.amazonaws.com/images.wisestamp.com/social_icons/square/instagram…] <http://www.instagram.com/supernode/>

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OsmoDevCon 2019 date poll
by Harald Welte 25 Oct '18

25 Oct '18

Dear all, I would like to get your input as to when we should schedule OsmoDevCon 2019. NOTE: OsmoDevCon is our "for developers by developers" event, not to be confused with OsmoCon, our public conference. If we want to stay with the usual "Friday through Monday in April" arrangement, we have the following options: April 05-08, 2019 April 12-15, 2019 April 26-29, 2019 The one missing weekend in the list above is the easter weekend, which is probably a good idea to exclude as flights and hotels are more expensive during that time, and people might have other plans during holidays. I would like to invite anyone planning to attend the Osmocom Developer Conference 2019 to participate in the poll at https://dudle.inf.tu-dresden.de/OsmoDevCon2019/ to state their availability/preference. The Dudle only shows the first day of the four days of OsmoDevCon. Looking forward to your feedback so we can settle on a date soon. Thanks! Kind regards, Harald -- - Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

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OsmoGGSN - Centos 7 Support
by Duleep Thilakarathne 16 Oct '18

16 Oct '18

Hi i am old user of openGGSN and planned to test OsmoGGSN. is it possible to compile osmoGGSN in Centos 7. is there any limitation. regards DT

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Problem with SGSN Location Update Reject during UE attach
by Lam Ngoc Tuan 16 Oct '18

16 Oct '18

Dear all We are facing the following problem and hope you can help us: - We use OSMO as UMTS core emulation, working with our real NodeB - During UE attach procedure we see from SGSN "Location Update Reject" and afterthat UE is released. - We do the comparison test with real UMTS core and our real NodeB, here it works properly, UE can attach successful. We assume there is some Osmo configuration problem but we have not found the root cause, we very appreciate if you can take a look and give us some advice. Here is the current message flow of UE attach 10.2.9.200 10.2.9.139 RANAP 170 (RUA) InitialUE-Message (DTAP) (MM) Location Updating Request 10.2.9.139 10.2.9.200 RANAP 158 SACK (RUA) DirectTransfer (DTAP) (MM) Authentication Request 10.2.9.200 10.2.9.139 RANAP 222 SACK (RUA) InitialUE-Message (DTAP) (GMM) Attach Request 10.2.9.139 10.2.9.200 RANAP 122 SACK (RUA) DirectTransfer (DTAP) (GMM) Identity Request 10.2.9.200 10.2.9.139 RANAP 118 (RUA) DirectTransfer (DTAP) (MM) Authentication Failure 10.2.9.139 10.2.9.200 RANAP 158 SACK (RUA) DirectTransfer (DTAP) (MM) Authentication Request 10.2.9.200 10.2.9.139 RANAP 154 SACK (RUA) DirectTransfer (DTAP) (GMM) Identity Response 10.2.9.139 10.2.9.200 RANAP 162 SACK (RUA) DirectTransfer (DTAP) (GMM) Authentication and Ciphering Req 10.2.9.200 10.2.9.139 RANAP 110 (RUA) DirectTransfer (DTAP) (MM) Authentication Response 10.2.9.139 10.2.9.200 RANAP 138 SACK (RUA) SecurityModeCommand 10.2.9.200 10.2.9.139 RANAP 98 (RUA) SecurityModeComplete 10.2.9.139 10.2.9.200 RANAP 122 SACK (RUA) CommonID 10.2.9.200 10.2.9.139 RANAP 166 SACK (RUA) DirectTransfer (DTAP) (GMM) Authentication and Ciphering Resp 10.2.9.139 10.2.9.200 RANAP 134 SACK (RUA) DirectTransfer (DTAP) (MM) Location Updating Accept 10.2.9.139 10.2.9.200 RANAP 122 (RUA) SecurityModeCommand --> 10.2.9.139 10.2.9.200 RANAP 106 (RUA) DirectTransfer (DTAP) (MM) Location Updating Reject 10.2.9.139 10.2.9.200 RANAP 102 (RUA) Iu-ReleaseCommand 10.2.9.200 10.2.9.139 RANAP 114 SACK (RUA) Iu-ReleaseComplete 10.2.9.200 10.2.9.139 RANAP 102 (RUA) SecurityModeReject 10.2.9.200 10.2.9.139 RANAP 102 (RUA) Iu-ReleaseRequest 10.2.9.139 10.2.9.200 RANAP 118 SACK (RUA) Iu-ReleaseCommand 10.2.9.200 10.2.9.139 RANAP 114 SACK (RUA) Iu-ReleaseComplete Thanks and regards Tuan Lam

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osmocom-net-gprs October 2018