OpenBSC December 2013

openbsc@lists.osmocom.org

15 participants
32 discussions

by mosbah abdelkader

> I don't understand. This callback will be called with data you need to write > to the network. In case of MTP Level3 you will need to wrap that around the > msgb you got. I means: is the interaction with mtp3 layer implemented (is sending sccp data by mtp3 implemented by the library?)? Also, what about the reception of data from mtp3 layer. is that implemented in the sccp lib. I am asking these questions because I see the code of mtp3 in the lib but no significant call is present in the sccp part of the lib. Thank you for your help.

1 month

[PATCH] sms_queue, smpp: Refactor MO SUBMIT code to make further changes easier.

by Alexander Chemeris

This is required to implement normal prefix/regexp routing in addition to the current "if unroutable" model. --- openbsc/src/libmsc/gsm_04_11.c | 63 +++++++++++++++++++++++----------------- 1 file changed, 37 insertions(+), 26 deletions(-) diff --git a/openbsc/src/libmsc/gsm_04_11.c b/openbsc/src/libmsc/gsm_04_11.c index e554b74..7e8ede8 100644 --- a/openbsc/src/libmsc/gsm_04_11.c +++ b/openbsc/src/libmsc/gsm_04_11.c @@ -279,6 +279,39 @@ static int gsm340_gen_tpdu(struct msgb *msg, struct gsm_sms *sms) return msg->len - old_msg_len; } +static int sms_queue_try_deliver(struct gsm_subscriber_connection *conn, + struct msgb *msg, struct gsm_sms *gsms) +{ + /* determine gsms->receiver based on dialled number */ + gsms->receiver = subscr_get_by_extension(conn->bts->network, gsms->dst.addr); + if (!gsms->receiver) { + rc = GSM411_RP_CAUSE_MO_NUM_UNASSIGNED; + goto out; + } + + switch (sms_mti) { + case GSM340_SMS_SUBMIT_MS2SC: + /* MS is submitting a SMS */ + rc = gsm340_rx_sms_submit(msg, gsms); + break; + case GSM340_SMS_COMMAND_MS2SC: + case GSM340_SMS_DELIVER_REP_MS2SC: + LOGP(DLSMS, LOGL_NOTICE, "Unimplemented MTI 0x%02x\n", sms_mti); + rc = GSM411_RP_CAUSE_IE_NOTEXIST; + break; + default: + LOGP(DLSMS, LOGL_NOTICE, "Undefined MTI 0x%02x\n", sms_mti); + rc = GSM411_RP_CAUSE_IE_NOTEXIST; + break; + } + + if (!rc && !gsms->receiver) + rc = GSM411_RP_CAUSE_MO_NUM_UNASSIGNED; + +out: + return rc; +} + /* process an incoming TPDU (called from RP-DATA) * return value > 0: RP CAUSE for ERROR; < 0: silent error; 0 = success */ static int gsm340_rx_tpdu(struct gsm_subscriber_connection *conn, struct msgb *msg) @@ -393,44 +426,22 @@ static int gsm340_rx_tpdu(struct gsm_subscriber_connection *conn, struct msgb *m /* FIXME: This looks very wrong */ send_signal(0, NULL, gsms, 0); - /* determine gsms->receiver based on dialled number */ - gsms->receiver = subscr_get_by_extension(conn->bts->network, gsms->dst.addr); - if (!gsms->receiver) { + rc = sms_queue_try_deliver(conn, msg, gsms); + if (rc == GSM411_RP_CAUSE_MO_NUM_UNASSIGNED) { #ifdef BUILD_SMPP rc = smpp_try_deliver(gsms, conn); - if (rc == 1) { - rc = 1; /* cause 1: unknown subscriber */ + if (rc == GSM411_RP_CAUSE_MO_NUM_UNASSIGNED) { osmo_counter_inc(conn->bts->network->stats.sms.no_receiver); } else if (rc < 0) { - rc = 21; /* cause 21: short message transfer rejected */ + rc = GSM411_RP_CAUSE_MO_NUM_UNASSIGNED; /* FIXME: handle the error somehow? */ } #else - rc = 1; /* cause 1: unknown subscriber */ osmo_counter_inc(conn->bts->network->stats.sms.no_receiver); #endif goto out; } - switch (sms_mti) { - case GSM340_SMS_SUBMIT_MS2SC: - /* MS is submitting a SMS */ - rc = gsm340_rx_sms_submit(msg, gsms); - break; - case GSM340_SMS_COMMAND_MS2SC: - case GSM340_SMS_DELIVER_REP_MS2SC: - LOGP(DLSMS, LOGL_NOTICE, "Unimplemented MTI 0x%02x\n", sms_mti); - rc = GSM411_RP_CAUSE_IE_NOTEXIST; - break; - default: - LOGP(DLSMS, LOGL_NOTICE, "Undefined MTI 0x%02x\n", sms_mti); - rc = GSM411_RP_CAUSE_IE_NOTEXIST; - break; - } - - if (!rc && !gsms->receiver) - rc = GSM411_RP_CAUSE_MO_NUM_UNASSIGNED; - out: sms_free(gsms); -- 1.7.9.5

11 years, 3 months

[PATCH] Use generic osmocom auth api

by ☎

Hi. Attached is a small patch which replaces direct call to comp128 from libosmocore to auth api call. This will help to remove comp128 from libosmocore public api and to use other auth functions in openbsc in future. -- best regards, Max, http://fairwaves.ru

11 years, 3 months

Unbounded AGCH queue in OsmoBTS

by Alexander Chemeris

Hi all, We're moving this discussion to the mailing list, as it seems it is more generic and complex than we've thought initially. The issue arose when I started doing load testing of the OsmoTRX transceiver and disabled all gating in it. As a result, all incoming noise was processed as valid Normal Bursts and Access Bursts and sent up to OsmoBTS. This leads to a situation, similar to a RACH flood, when there are more RACH requests coming, than a BTS could reasonably process. And this leads to an unbounded increase of the AGCH queue in the BTS - it consumes a few Mb per minute. I think that this is the root cause of the issue we've seen at a Netherlands festival installation, when 20K phones suddenly started connecting to our station after official networks went down. When the amount of RACH requests exceeded available CCCH capacity (took <5 seconds), mobile phones stopped answering out IMM.ASS messages. Hypothesis is that the AGCH queue became so long, requests were sent too late for a phone to receive it. And thus no phones answered to our IMM.ASS messages. Unfortunately, I wasn't able to collect enough data to check this hypothesis during that time and we don't have another big festival on hands atm. An attached is a quick fix for the unbounded queue growth. It uses a hardcoded value for the maximum queue length, which is fine for our load testing, but not flexible enough for the real life usage. We should make the AGCH queue long enough to keep high performance. At the same time, it must not exceed MS timeout or _all_ IMM.ASS messages will miss their target MS's. We could make this parameter user-configurable on a BTS side, but it seems more reasonable to automatically calculate it, depending on the channel combination and timeout values. But this should be done on the BSC side. So the questions are: 1) what is a good way to calculate it? 2) should we configure this queue length over OML, or move the queue from BTS to BSC? -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru

11 years, 4 months

Re: Openbsc support for new BTS

by Harald Welte

Hi Jason, On Fri, Nov 08, 2013 at 01:21:46PM +0000, Jason DSouza wrote: > But I'm waiting at Opstart for Obj Class - RADIO_CARRIER to trigger > trx-init() which is never received from BSC. That is where I'm struck > now. All this so far is similar to sysmobts interface, something > similar to bts_model_opstart() function in osmo-bts-sysmo. Please see the following code from bts_ipaccess_nanobts.c: ============== /* Callback function to be called whenever we get a GSM 12.21 state change event */ static int nm_statechg_event(int evt, struct nm_statechg_signal_data *nsd) { [...] case NM_OC_RADIO_CARRIER: trx = obj; if (new_state->operational == NM_OPSTATE_DISABLED && new_state->availability == NM_AVSTATE_OK) abis_nm_opstart(trx->bts, obj_class, trx->bts->bts_nr, trx->nr, 0xff); break; ============== So the opstrart for the RADIO_CARRIER is sent in response to an incoming NM_MT_STATECHG_EVENT_REP withe the operational state set to DISABLED and the availability set to OK. My guess is that you are not sending such a state event from the BTS to the BSC. I can also not see that in the pcap file you have sent. All OML messages in there relate to the Site MAnager or the BTS object class, but there are no messages related to any other MOs. As indicated, it is best to start from a known-working setup with a supported BTS model, or at least from a protocol trace of an existing supported configuration. Please also make sure to set your 'bts model' to nanobts, I _think_ the 'bts model sysmobts' is still broken. 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)

11 years, 5 months

[PATCH 1/4] Each BTS can be configured for speech support (other than GSM full rate)

by Andreas Eversberg

Speech codings which are not supported by BTS will be removed from the bearer capability information element after parsing. This way it is not required for the MNCC application to consider support of each BTS. Only GSM full rate is supported by default. --- openbsc/include/openbsc/gsm_data_shared.h | 9 ++++ openbsc/src/libbsc/bsc_vty.c | 72 +++++++++++++++++++++++++++++ openbsc/src/libmsc/gsm_04_08.c | 28 +++++++++++ 3 files changed, 109 insertions(+), 0 deletions(-) diff --git a/openbsc/include/openbsc/gsm_data_shared.h b/openbsc/include/openbsc/gsm_data_shared.h index 84d15ef..4a41498 100644 --- a/openbsc/include/openbsc/gsm_data_shared.h +++ b/openbsc/include/openbsc/gsm_data_shared.h @@ -143,6 +143,12 @@ struct bts_ul_meas { uint8_t inv_rssi; }; +struct bts_codec_conf { + uint8_t hr; + uint8_t efr; + uint8_t amr; +}; + struct amr_mode { uint8_t mode; uint8_t threshold; @@ -704,6 +710,9 @@ struct gsm_bts { /* exclude the BTS from the global RF Lock handling */ int excl_from_rf_lock; + + /* supported codecs beside FR */ + struct bts_codec_conf codec; #endif /* ROLE_BSC */ void *role; }; diff --git a/openbsc/src/libbsc/bsc_vty.c b/openbsc/src/libbsc/bsc_vty.c index b034981..f444427 100644 --- a/openbsc/src/libbsc/bsc_vty.c +++ b/openbsc/src/libbsc/bsc_vty.c @@ -629,6 +629,15 @@ static void config_write_bts_single(struct vty *vty, struct gsm_bts *bts) } } + vty_out(vty, " codec-support fr"); + if (bts->codec.hr) + vty_out(vty, " hr"); + if (bts->codec.efr) + vty_out(vty, " efr"); + if (bts->codec.amr) + vty_out(vty, " amr"); + vty_out(vty, "%s", VTY_NEWLINE); + config_write_bts_gprs(vty, bts); if (bts->excl_from_rf_lock) @@ -2635,6 +2644,65 @@ DEFUN(cfg_bts_no_excl_rf_lock, return CMD_SUCCESS; } +static void _get_codec_from_arg(struct vty *vty, int argc, const char *argv[]) +{ + struct gsm_bts *bts = vty->index; + struct bts_codec_conf *codec = &bts->codec; + int i; + + codec->hr = 0; + codec->efr = 0; + codec->amr = 0; + for (i = 0; i < argc; i++) { + if (!strcmp(argv[i], "hr")) + codec->hr = 1; + if (!strcmp(argv[i], "efr")) + codec->efr = 1; + if (!strcmp(argv[i], "amr")) + codec->amr = 1; + } +} + +#define CODEC_PAR_STR " (fr|hr|efr|amr)" +#define CODEC_HELP_STR "Full Rate (mandatory)\nHalf Rate\n" \ + "Enhanced Full Rate\nAdaptive Multirate\n" + +DEFUN(cfg_bts_codec1, cfg_bts_codec1_cmd, + "codec-support" CODEC_PAR_STR, + "Codec Support settings\n" + CODEC_HELP_STR) +{ + _get_codec_from_arg(vty, 1, argv); + return CMD_SUCCESS; +} + +DEFUN(cfg_bts_codec2, cfg_bts_codec2_cmd, + "codec-support" CODEC_PAR_STR CODEC_PAR_STR, + "Codec Support settings\n" + CODEC_HELP_STR CODEC_HELP_STR) +{ + _get_codec_from_arg(vty, 2, argv); + return CMD_SUCCESS; +} + +DEFUN(cfg_bts_codec3, cfg_bts_codec3_cmd, + "codec-support" CODEC_PAR_STR CODEC_PAR_STR CODEC_PAR_STR, + "Codec Support settings\n" + CODEC_HELP_STR CODEC_HELP_STR CODEC_HELP_STR) +{ + _get_codec_from_arg(vty, 3, argv); + return CMD_SUCCESS; +} + +DEFUN(cfg_bts_codec4, cfg_bts_codec4_cmd, + "codec-support" CODEC_PAR_STR CODEC_PAR_STR CODEC_PAR_STR CODEC_PAR_STR, + "Codec Support settings\n" + CODEC_HELP_STR CODEC_HELP_STR CODEC_HELP_STR CODEC_HELP_STR) +{ + _get_codec_from_arg(vty, 4, argv); + return CMD_SUCCESS; +} + #define TRX_TEXT "Radio Transceiver\n" /* per TRX configuration */ @@ -3231,6 +3299,10 @@ int bsc_vty_init(const struct log_info *cat) install_element(BTS_NODE, &cfg_bts_si5_neigh_cmd); install_element(BTS_NODE, &cfg_bts_excl_rf_lock_cmd); install_element(BTS_NODE, &cfg_bts_no_excl_rf_lock_cmd); + install_element(BTS_NODE, &cfg_bts_codec1_cmd); + install_element(BTS_NODE, &cfg_bts_codec2_cmd); + install_element(BTS_NODE, &cfg_bts_codec3_cmd); + install_element(BTS_NODE, &cfg_bts_codec4_cmd); install_element(BTS_NODE, &cfg_trx_cmd); install_node(&trx_node, dummy_config_write); diff --git a/openbsc/src/libmsc/gsm_04_08.c b/openbsc/src/libmsc/gsm_04_08.c index 3cfc455..dec97f2 100644 --- a/openbsc/src/libmsc/gsm_04_08.c +++ b/openbsc/src/libmsc/gsm_04_08.c @@ -79,6 +79,29 @@ struct gsm_lai { uint16_t lac; }; +static int apply_codec_restrictions(struct gsm_bts *bts, + struct gsm_mncc_bearer_cap *bcap) +{ + int i, j; + + /* remove unsupported speech versions from list */ + for (i = 0, j = 0; bcap->speech_ver[i] >= 0; i++) { + if (bcap->speech_ver[i] == GSM48_BCAP_SV_FR) + bcap->speech_ver[j++] = GSM48_BCAP_SV_FR; + if (bcap->speech_ver[i] == GSM48_BCAP_SV_EFR && bts->codec.efr) + bcap->speech_ver[j++] = GSM48_BCAP_SV_EFR; + if (bcap->speech_ver[i] == GSM48_BCAP_SV_AMR_F && bts->codec.amr) + bcap->speech_ver[j++] = GSM48_BCAP_SV_AMR_F; + if (bcap->speech_ver[i] == GSM48_BCAP_SV_HR && bts->codec.hr) + bcap->speech_ver[j++] = GSM48_BCAP_SV_HR; + if (bcap->speech_ver[i] == GSM48_BCAP_SV_AMR_H && bts->codec.amr) + bcap->speech_ver[j++] = GSM48_BCAP_SV_AMR_H; + } + bcap->speech_ver[j] = -1; + + return 0; +} + static uint32_t new_callref = 0x80000001; void cc_tx_to_mncc(struct gsm_network *net, struct msgb *msg) @@ -1763,6 +1786,7 @@ static int gsm48_cc_rx_setup(struct gsm_trans *trans, struct msgb *msg) setup.fields |= MNCC_F_BEARER_CAP; gsm48_decode_bearer_cap(&setup.bearer_cap, TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1); + apply_codec_restrictions(trans->conn->bts, &setup.bearer_cap); } /* facility */ if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) { @@ -1916,6 +1940,7 @@ static int gsm48_cc_rx_call_conf(struct gsm_trans *trans, struct msgb *msg) call_conf.fields |= MNCC_F_BEARER_CAP; gsm48_decode_bearer_cap(&call_conf.bearer_cap, TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1); + apply_codec_restrictions(trans->conn->bts, &call_conf.bearer_cap); } /* cause */ if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) { @@ -2604,6 +2629,7 @@ static int gsm48_cc_rx_modify(struct gsm_trans *trans, struct msgb *msg) modify.fields |= MNCC_F_BEARER_CAP; gsm48_decode_bearer_cap(&modify.bearer_cap, TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1); + apply_codec_restrictions(trans->conn->bts, &modify.bearer_cap); } new_cc_state(trans, GSM_CSTATE_MO_ORIG_MODIFY); @@ -2646,6 +2672,7 @@ static int gsm48_cc_rx_modify_complete(struct gsm_trans *trans, struct msgb *msg modify.fields |= MNCC_F_BEARER_CAP; gsm48_decode_bearer_cap(&modify.bearer_cap, TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1); + apply_codec_restrictions(trans->conn->bts, &modify.bearer_cap); } new_cc_state(trans, GSM_CSTATE_ACTIVE); @@ -2686,6 +2713,7 @@ static int gsm48_cc_rx_modify_reject(struct gsm_trans *trans, struct msgb *msg) modify.fields |= GSM48_IE_BEARER_CAP; gsm48_decode_bearer_cap(&modify.bearer_cap, TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1); + apply_codec_restrictions(trans->conn->bts, &modify.bearer_cap); } /* cause */ if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) { -- 1.7.3.4

11 years, 5 months

[PATCH] libabis: Enable TCP keepalive by default on all BTS connections

by Jacob Erlbeck

From: Daniel Willmann <daniel(a)totalueberwachung.de> This way we can find out fast if the connection is broken. Ticket: OW#1060 --- src/input/ipaccess.c | 35 ++++++++++++++++++++++++++++++++++- 1 file changed, 34 insertions(+), 1 deletion(-) diff --git a/src/input/ipaccess.c b/src/input/ipaccess.c index 4a56569..371b21c 100644 --- a/src/input/ipaccess.c +++ b/src/input/ipaccess.c @@ -28,6 +28,7 @@ #include <stdlib.h> #include <stdbool.h> #include <errno.h> +#include <netinet/tcp.h> #include <string.h> #include <time.h> #include <sys/fcntl.h> @@ -50,6 +51,10 @@ static void *tall_ipa_ctx; #define TS1_ALLOC_SIZE 900 +#define DEFAULT_TCP_KEEPALIVE_IDLE_TIMEOUT 30 +#define DEFAULT_TCP_KEEPALIVE_INTERVAL 3 +#define DEFAULT_TCP_KEEPALIVE_RETRY_COUNT 10 + /* * Common propietary IPA messages: * - PONG: in reply to PING. @@ -605,7 +610,7 @@ static int ipaccess_bsc_oml_cb(struct ipa_server_link *link, int fd) { int ret; int idx = 0; - int i; + int i, val; struct e1inp_line *line; struct e1inp_ts *e1i_ts; struct osmo_fd *bfd; @@ -638,6 +643,34 @@ static int ipaccess_bsc_oml_cb(struct ipa_server_link *link, int fd) goto err_line; } + /* Enable TCP keepalive to find out if the connection is gone */ + val = 1; + ret = setsockopt(bfd->fd, SOL_SOCKET, SO_KEEPALIVE, &val, sizeof(val)); + if (ret < 0) + LOGP(DLINP, LOGL_NOTICE, "Failed to set keepalive: %s\n", + strerror(errno)); + else + LOGP(DLINP, LOGL_NOTICE, "Keepalive is set: %i\n", ret); + +#if defined(TCP_KEEPIDLE) && defined(TCP_KEEPINTVL) && defined(TCP_KEEPCNT) + /* The following options are not portable! */ + val = DEFAULT_TCP_KEEPALIVE_IDLE_TIMEOUT; + ret = setsockopt(bfd->fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof(val)); + if (ret < 0) + LOGP(DLINP, LOGL_NOTICE, "Failed to set keepalive idle time: %s\n", + strerror(errno)); + val = DEFAULT_TCP_KEEPALIVE_INTERVAL; + ret = setsockopt(bfd->fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof(val)); + if (ret < 0) + LOGP(DLINP, LOGL_NOTICE, "Failed to set keepalive interval: %s\n", + strerror(errno)); + val = DEFAULT_TCP_KEEPALIVE_RETRY_COUNT; + ret = setsockopt(bfd->fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof(val)); + if (ret < 0) + LOGP(DLINP, LOGL_NOTICE, "Failed to set keepalive count: %s\n", + strerror(errno)); +#endif + /* Request ID. FIXME: request LOCATION, HW/SW VErsion, Unit Name, Serno */ ret = ipaccess_send_id_req(bfd->fd); if (ret < 0) { -- 1.7.9.5

11 years, 5 months

abis_nm_pchan4chcomb API and return value

by Holger Hans Peter Freyther

Dear Harald, there is an open coverity issue in osmo-bts (CID 1040768) and it is about mixing enum types. enum abis_nm_chan_comb abis_nm_pchan4chcomb(uint8_t chcomb)

11 years, 5 months

[PATCH] nitb: Set the DST field in generated MM info messages

by Jacob Erlbeck

Currently the NET_DST information element (see GSM 24.008) is not included in generated MM info messages even when the DST field in the timezone info has been set via the VTY or the control interface. This patch modifies gsm48_tx_mm_info() to append this information element if (and only if) a non-zero DST has been configured. The DST IE is not part of GSM 4.8. Therefore it will only be sent, if the DST offset is configured to a value != 0. Sponsored-by: On-Waves ehf --- openbsc/src/libmsc/gsm_04_08.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/openbsc/src/libmsc/gsm_04_08.c b/openbsc/src/libmsc/gsm_04_08.c index 3cfc455..0d1ba7b 100644 --- a/openbsc/src/libmsc/gsm_04_08.c +++ b/openbsc/src/libmsc/gsm_04_08.c @@ -656,6 +656,7 @@ int gsm48_tx_mm_info(struct gsm_subscriber_connection *conn) struct tm* gmt_time; struct tm* local_time; int tzunits; + int dst = 0; msg->lchan = conn->lchan; @@ -749,6 +750,9 @@ int gsm48_tx_mm_info(struct gsm_subscriber_connection *conn) tzunits = tzunits + (bts->tz.mn/15); ptr8[7] = bcdify(tzunits); } + /* Convert DST value */ + if (bts->tz.dst >= 0 && bts->tz.dst <= 2) + dst = bts->tz.dst; } else { /* Need to get GSM offset and convert into 15 min units */ @@ -768,8 +772,19 @@ int gsm48_tx_mm_info(struct gsm_subscriber_connection *conn) } else ptr8[7] = bcdify(tzunits); + + /* Does not support DST +2 */ + if (local_time->tm_isdst) + dst = 1; } +#ifdef GSM48_IE_NET_DST + ptr8 = msgb_put(msg, 3); + ptr8[0] = GSM48_IE_NET_DST; + ptr8[1] = 1; + ptr8[2] = dst; +#endif + DEBUGP(DMM, "-> MM INFO\n"); return gsm48_conn_sendmsg(msg, conn, NULL); -- 1.7.9.5

11 years, 5 months

Making jolly/testing ready to be merged?

by Holger Hans Peter Freyther

Dear Andreas, going through the patchset of jolly/testing in OpenBSC it would be nice to get most of the things merged (having TCH/H support for something like the 31C3 is a nice goal). I wanted to start with merging the Connection Failure Criteria code but I am confused about the conversion. When parsing the criteria value from from the VTY you divide by four and subtract (so 4 becomes 0). You ondo this when saving the config and patching it in the nanoBTS attribute array. Wouldn't it be more easy to not doing the conversion? holger

11 years, 5 months

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OpenBSC December 2013