OpenBSC April 2011

openbsc@lists.osmocom.org

22 participants
36 discussions

by jason mercury

I have some questions: 1) When I start bsc_hack bsc_init.c first establishes OML link and initializes the bts then it establishes RSL link and bts starts broadcasting. However, it takes so much time to start the bts. Instead of this I want to do the following: it establishes OML link at the beginning and only once, then when i want to start broadcasting it establishes just the RSL link and bts will start faster since i don't have to wait for OML link. What should be done for this? 2) If i send one or two word messages from telnet interface it is okay. But if i send a longer message the phone could't receive the end of the message correctly(last words may be incomplete). Did any one encounter with this problem? What is wrong with me? 3) Could I send SMS in which extension of the sender is text not integer. For example, i want to send an information SMS that this is a test network. For this purpose i want to send an SMS from 'OpenBSC'. I set the extension of the first subscriber in database as text and tried to send the SMS but SMS wasn't delivered. What should i do? 4) Can i add SMS externally to SMS table of database? Thanks. Jason

12 years, 2 months

sms bugfix

by Dennis Wehrle

Hello Our goal was to send status sms via the vty interface. But all of our sms were cropped. In contrast sms from one MS to another MS are displayed correctly (despite the fact, that the text at the database contains several '@' at the end / the user_data contains several zero-octets). Therefore i have inspect the code and found several bugs. The main problem is that the "user_data_len" is not correctly used. As per GSM 03.40, 9.2.3.16 TP‑User‑Data‑Length (TP‑UDL): "If the TP‑User‑Data is coded using the GSM 7 bit default alphabet, the TP‑User‑Data‑Length field gives an integer representation of the number of septets within the TP‑User‑Data field to follow." Currently the "user_data_len" contains the number of octets (returned from gsm_7bit_encode(...) at gsm_utils.c (libosmocore)). The big problem here is that this information is not unique, e.g.: 1.) 46 non-extension characters + 1 extension character => (46 * 7 bit + (1 * (2 * 7 bit))) / 8 bit = 42 octets 2.) 47 non-extension characters => (47 * 7 bit) / 8 bit = 41,125 = 42 octets 3.) 48 non-extension characters => (48 * 7 bit) / 8 bit = 42 octects But the MS has to know the correct "user_data_len" to decode the correct number of characters. For this reason i updated the gsm_7bit_encode() function to return the correct number of septets. However sometimes it is needed to know the correct number of octets (e.g. at gsm_04_11.c: gsm340_gen_tpdu(...)) => i added a function to gsm_utils.c named: uint8_t get_octet_len(const uint8_t sept_len) I have also fixed the problem, that the sms are wrongly stored / displayed on the database. But the solution on the function *sms_from_result(...) (at db.c) is not really "beautiful". This is because there exists no "user_data_len" field at the database. To store the right value for "user_data_len" (which is further needed) i have to get the length from the "text" field. Unfortunately this is not enough. If the text contains extension characters like {[]} etc. then the "user_data_len" has to be bigger because these characters needs two septets. Therefore i use a switch statement so search for these characters. A better solution for that is to store the right "user_data_len" to the database (on the encoding / decoding procedure). But i don't know if this is a suitable solution for all of you (because you have to change your database structure etc.). Best Regards Dennis Wehrle

13 years, 6 months

Licensing of the wiki

by Harald Welte

Hi all, so far we do not have any statement about the licensing of the content on our wiki. This means the default copyright rules apply: All the content is copyrighted, and nobody has any rgiht to reproduce it at all. I would like to propose an official license for the content in the wiki: Create Commons CC-BY-SA. The alternative would be to go for CC-BY-NC-SA, disallowing commercial use of the content. I'm not certain if NC is really what we want. After all, even somebody using OpenBSC in a commercial environment should be able to make copies of the reference documentation we have available - as long as he will releas the result again (which the SA part already covers). If the major contributors to the wiki would agree to a license, I would update the wiki accordingly. Thanks, 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)

13 years, 7 months

[PATCH 0/3] new VTY commands to enable IPA proxy

by pablo＠gnumonks.org

From: Pablo Neira Ayuso <pablo(a)gnumonks.org> Hi! This patchset adds new VTY commands that allows to route IPA flows. Patch 3/3 includes one feature that changes the current default behaviour of OpenBSC since you explicity have to make a "ipa setup" to enable OML and RSL links. If you like it, I can make a similar patch for HSL femto, so the only initial open socket is the one at port 4242 for telnet configuration. BTW, the original command syntax was proposed by Harald. Successfully tested bootstrapping the nanoBTS. See the patches for more details. Comments welcome! Pablo Neira Ayuso (3): libcommon: add make_sock_stream_connect() libabis: add VTY commands to route IPA flows libabis: add IPA VTY command to setup ip.access nanoBTS OML and RSL links openbsc/include/openbsc/ipaccess.h | 3 + openbsc/include/openbsc/socket.h | 2 + openbsc/include/openbsc/vty.h | 1 + openbsc/src/ipaccess/Makefile.am | 4 +- openbsc/src/libabis/Makefile.am | 2 +- openbsc/src/libabis/e1_input.c | 2 + openbsc/src/libabis/input/ipaccess.c | 962 +++++++++++++++++++++++++++++- openbsc/src/libbsc/bsc_vty.c | 1 + openbsc/src/libcommon/socket.c | 54 ++ openbsc/src/openbsc.cfg.ipa-proxy | 18 + openbsc/src/openbsc.cfg.nanobts | 3 + openbsc/src/openbsc.cfg.nanobts.multitrx | 3 + openbsc/tests/db/Makefile.am | 5 +- 13 files changed, 1043 insertions(+), 17 deletions(-) create mode 100644 openbsc/src/openbsc.cfg.ipa-proxy -- 1.7.2.3

13 years, 9 months

TODO: openbsc.cfg console logging options

by Harald Welte

Hi Pablo! I've recently received a bug report that somehow the config-file-stored configuration of which log levels/subsystems to enable on stderr don't work. This may be related to the legacy "-d DINP:DNM:... style log level specifications, e.g. we first read the config file and then set some default logging options usign the legacy version. Maybe you can find some time to investigate and fix the issue. Thanks in advance, 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)

13 years, 9 months

problems with pysim-prog

by Pablo Neira Ayuso

Hi! I'm experiencing problems with pysim-prog. Using the example available in the README file. # ./pySim-prog.py -n 26C3 -c 49 -x 262 -y 42 -z lila -j 0 Insert card now (or CTRL-C to cancel) I get stuck here forever. The same message shows if I remove the supersim card from the reader. Running pysim inside strace shows: write(1, "Insert card now (or CTRL-C to cancel)\n", 38) = 38 ioctl(3, TIOCMBIS, [TIOCM_RTS]) = 0 select(0, NULL, NULL, NULL, {0, 100000}) = 0 (Timeout) ioctl(3, TCFLSH, 0) = 0 ioctl(3, TIOCMBIC, [TIOCM_RTS]) = 0 select(4, [3], [], [], {1, 0}) = 0 (Timeout) select(0, NULL, NULL, NULL, {0, 500000}) = 0 (Timeout) ioctl(3, TIOCMBIS, [TIOCM_RTS]) = 0 select(0, NULL, NULL, NULL, {0, 100000}) = 0 (Timeout) ioctl(3, TCFLSH, 0) = 0 ioctl(3, TIOCMBIC, [TIOCM_RTS]) = 0 ... [and so on] The pl2303 module is loaded correctly, and I have used it before to access some embedded devices via serial line: pl2303 2-2:1.0: pl2303 converter detected usb 2-2: pl2303 converter now attached to ttyUSB0 usb 2-2: USB disconnect, device number 11 pl2303 ttyUSB0: pl2303 converter now disconnected from ttyUSB0 Any clue on what's wrong? Thanks!

13 years, 9 months

Your http://openbsc.mciroembedded.com/ site

by Harald Welte

Hi "Mr. Unknown", it has come to my attention that you are running a copy of our OpenBSC website (http://openbsc.osmocom.org/) at http://openbsc.microembedded.com/ We appreciate your enthusiasm for OpenBSC and like to thank you for your work on the Chinese translation. However, it would have been good to coordinate about this with us. Making a copy of the website as a sub-domain to your company "MicroEmbedded" may seem to some people as if you were representing the OpenBSC project (which you are not), or that OpenBSC is somehow a work of your MicroEmbedded company. After some checking, it seems that the final line on each page "注： BscHack （英文原文出处，以上翻译整理仅供 OpenBSC 爱好者参考! email: support(a)microembedded.com ）" provides a link to the orignal page at bs11-abis.gnumonks.org. Once again in this link you provide your e-mail address, followed by the company footer of your web-page. The contents of the OpenBSC website has copyright, and we do not think it is appropriate for you to associate your company in this way with OpenBSC. You are not a member of the project, you have not contributed to the OpenBSC software, and you have not contacted us about obtainign permission to make such a translated copy. Furthermore, there are several problems with your website: 1) it is out of date, as you have used a very old version of the OpenBSC website to translate. As a result, quite some of your links back to the original OpenBSC site are broken. 2) You have introduced capitalization changes like "$ Sqlite" which will not work, as the command is "$ sqlite" If your intentions in running a translated OpenBSC site are honest, I would like to invite you to do so in working together with us. We can provide you with the respective space on the official homepage, and you can contribute your translated content there. In return, we may put a "thank you" link to microembedded.com in the Thanks section at http://openbsc.osmocom.org/trac/wiki#Thanks We hope this is acceptable to you. In any case, we hope you can understand that we will not tolerate you putting your company name next to a copy of the OpenBSC wiki. 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)

13 years, 9 months

[PATCH] include: fix missing extern in osmo_panic* declarations

by pablo＠gnumonks.org

From: Pablo Neira Ayuso <pablo(a)gnumonks.orgt> This patch adds the missing extern to osmo_panic* declarations. --- include/osmocom/core/panic.h | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/include/osmocom/core/panic.h b/include/osmocom/core/panic.h index c5a8377..c28a844 100644 --- a/include/osmocom/core/panic.h +++ b/include/osmocom/core/panic.h @@ -5,7 +5,7 @@ typedef void (*osmo_panic_handler_t)(const char *fmt, va_list args); -void osmo_panic(const char *fmt, ...); -void osmo_set_panic_handler(osmo_panic_handler_t h); +extern void osmo_panic(const char *fmt, ...); +extern void osmo_set_panic_handler(osmo_panic_handler_t h); #endif -- 1.7.2.3

13 years, 9 months

Strange nanoBTS Behavior

by Max Marbler

Dear List, I'm a long time listener, first time caller - but have been enjoying experimenting with OpenBSC for a little while now. I've come across a new (to me) nanoBTS with some strange behavior: it seems to come up normally and pull an IP over DHCP, and interacts as expected with the ipaccess-find and ipaccess-config tools, but *never* attempts to establish an OML link. After provisioning the correct settings with ipaccess-config, the unit reboots and slow-flashes the orange light (no OML) and there is *no* network traffic initiated by the nanoBTS past the DHCP exchange; however, I can ping the unit using ipaccess-find and ping. After running a reset with the dongle and a repeat of the above, I get the same results. Any ideas? Thank You, -MM

13 years, 10 months

intra BSC Handover

by Christopher HENARD

Hello all, I want a confirmation. I 've seen in openBSC features that openBSC handles handover between cells inside one BSC. So I think it's possible to connect several nanoBTS to openBSC and move from one cell to another without losing the outgoing call. Am I right ? Thank you. Chris

13 years, 10 months

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OpenBSC April 2011