osmocom-net-gprs

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483 discussions

Security Issue
by Dhiraj Mishra 13 Jan '19

13 Jan '19

Hi List, I found a security issue in libgtpnl osmocom project, could some one please let me know where to submit such bugs ? Thank you

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OsmoDevCon 2019 registration
by Harald Welte 01 Jan '19

01 Jan '19

Dear fellow Osmocom developers, I'm a bit surprised to notice that not more people have signed up for OsmoDevCon 2019. I guess it was mostly an oversight when the date was originally announced, and not a lack of interest? ;) All details about the event are available at the related wiki page at: https://osmocom.org/projects/osmo-dev-con/wiki/OsmoDevCon2019 Please enter your name at https://osmocom.org/projects/osmo-dev-con/wiki/OsmoDevCon2019#Requested in case you would like to attend. Registering early allows proper planning. Thanks! Looking forward to meeting old and new Osmocom developers in April 2019. 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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Question about basic usage of GTP kernel module
by Michał Siuda 08 Dec '18

08 Dec '18

Hi, I'm trying to build a simple node that would encap/decap between IP and GTP in the user plane. For this I have been using gtp-link and gtp-tunnel tools of the libgtpnl, but with no luck so far. Could anyone please review my setup and let me know what I'm doing wrong? Topology: node1 - DUT, I would like to be able to send a ping from this node such that it is encapsulated into GTP tunnel towards node2. 2 interfaces: - ens6 - represents interface towards MS, has address 20.1.1.1/24 - ens7 - represents interface towards GGSN, has address 10.1.1.1/24 node2 Just a single interface towards node1, address 10.1.1.2/24 Test: On node2, I'm following these steps: - creating a GTP device: # ./gtp-link add gtp-u - adding a GTP tunnel: # ./gtp-tunnel add gtp-u v1 20 10 20.1.1.1 10.1.1.2 # ./gtp-tunnel list version 1 tei 20/10 ms_addr 20.1.1.1 sgsn_addr 10.1.1.2 - adding a route to an address representing APN to use the GTP device: # ip route add 8.8.8.8 src 20.1.1.1 dev gtp-u - Trying to ping 8.8.8.8 Result: I was expecting to see ECMP packets to 8.8.8.8 to be sent out via ens7 towards node2 and encapsulated in GTP. However, I can only see that these packets appear on the gtp-u interface, but are not forwarded. Looking at interface stats on gtp-u, I can see that the ping hits "tx_error" counter. Is there anything I'm missing here? Are any parameters wrong? Or am I misunderstanding the function of the GTP-U kernel support entirely? Any help would be appreciated. Thanks, Michael

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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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[BUG][OSMO-PCU][OSMO-SGSN] GPRS and EGPRS attach procedure is not working with Kirin Modem phones
by Bipin Jaiswal 06 Dec '18

06 Dec '18

Hi, We are using Honor 7X mobile phone with Huawei Kirin modem and observed that GPRS and EGPRS attach is not working with Huawei Kirin Modem phones. There is no issue observed from OSMO-PCU. it seems either Huawei Kirin modem issue or OSMO-SGSN issue. Please check below analysis for this issue. 1- UE send attach request with IMSI and invalid MCC and MNC to SGSN. 2- SGSN send Identity Request with IMEI to UE. 3- UE responded Identity Response with IMEI to SGSN. 4- SGSN sends ATTACH ACCEPT message to SGSN with new PMTSI but UE is not responding ATTACH COMPLETE message to SGSN and resend ATTACH REQUEST message to SGSN. 5- SO SGSN re transmit ATTACH ACCEPT message to UE and after max number of re transmission , SGSN is release UE MM context. It seems that UE is not accepting ATTACH ACCEPT message. We also observed that Huawei Kirin UE is sending wrong LLC data to SGSN. UE had set more bit in RLC LME header and send invalid LLC data with 0x2B. So OSMO-PCU had forward this data to SGSN because more bit is set and SGSN is complaining LLC error for this LLC data. Please look into this issue or let us know if we have fix for this issue. Thanks, Bipin Jaiswal

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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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