2849 lines
85 KiB
C
2849 lines
85 KiB
C
/* GSM Radio Signalling Link messages on the A-bis interface
|
|
* 3GPP TS 08.58 version 8.6.0 Release 1999 / ETSI TS 100 596 V8.6.0 */
|
|
|
|
/* (C) 2008-2019 by Harald Welte <laforge@gnumonks.org>
|
|
* (C) 2012 by Holger Hans Peter Freyther
|
|
*
|
|
* All Rights Reserved
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
* the Free Software Foundation; either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <errno.h>
|
|
#include <inttypes.h>
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
|
|
#include <osmocom/bsc/gsm_data.h>
|
|
#include <osmocom/bsc/gsm_04_08_rr.h>
|
|
#include <osmocom/gsm/gsm_utils.h>
|
|
#include <osmocom/bsc/abis_rsl.h>
|
|
#include <osmocom/bsc/bsc_rll.h>
|
|
#include <osmocom/bsc/debug.h>
|
|
#include <osmocom/gsm/tlv.h>
|
|
#include <osmocom/gsm/protocol/gsm_04_08.h>
|
|
#include <osmocom/gsm/protocol/gsm_08_58.h>
|
|
#include <osmocom/bsc/paging.h>
|
|
#include <osmocom/bsc/signal.h>
|
|
#include <osmocom/bsc/meas_rep.h>
|
|
#include <osmocom/abis/e1_input.h>
|
|
#include <osmocom/gsm/rsl.h>
|
|
#include <osmocom/core/talloc.h>
|
|
#include <osmocom/bsc/pcu_if.h>
|
|
#include <osmocom/bsc/gsm_08_08.h>
|
|
#include <osmocom/netif/rtp.h>
|
|
#include <osmocom/core/tdef.h>
|
|
#include <osmocom/bsc/bsc_subscr_conn_fsm.h>
|
|
#include <osmocom/bsc/timeslot_fsm.h>
|
|
#include <osmocom/bsc/lchan_select.h>
|
|
#include <osmocom/bsc/lchan_fsm.h>
|
|
#include <osmocom/bsc/lchan_rtp_fsm.h>
|
|
#include <osmocom/bsc/handover_fsm.h>
|
|
#include <osmocom/bsc/smscb.h>
|
|
#include <osmocom/bsc/bts.h>
|
|
|
|
static void send_lchan_signal(int sig_no, struct gsm_lchan *lchan,
|
|
struct gsm_meas_rep *resp)
|
|
{
|
|
struct lchan_signal_data sig;
|
|
sig.lchan = lchan;
|
|
sig.mr = resp;
|
|
osmo_signal_dispatch(SS_LCHAN, sig_no, &sig);
|
|
}
|
|
|
|
static void count_codecs(struct gsm_bts *bts, struct gsm_lchan *lchan)
|
|
{
|
|
OSMO_ASSERT(bts);
|
|
|
|
if (lchan->type == GSM_LCHAN_TCH_H) {
|
|
switch (gsm48_chan_mode_to_non_vamos(lchan->current_ch_mode_rate.chan_mode)) {
|
|
case GSM48_CMODE_SPEECH_AMR:
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts->bts_ctrs, BTS_CTR_CODEC_AMR_H));
|
|
break;
|
|
case GSM48_CMODE_SPEECH_V1:
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts->bts_ctrs, BTS_CTR_CODEC_V1_HR));
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
} else if (lchan->type == GSM_LCHAN_TCH_F) {
|
|
switch (gsm48_chan_mode_to_non_vamos(lchan->current_ch_mode_rate.chan_mode)) {
|
|
case GSM48_CMODE_SPEECH_AMR:
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts->bts_ctrs, BTS_CTR_CODEC_AMR_F));
|
|
break;
|
|
case GSM48_CMODE_SPEECH_V1:
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts->bts_ctrs, BTS_CTR_CODEC_V1_FR));
|
|
break;
|
|
case GSM48_CMODE_SPEECH_EFR:
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts->bts_ctrs, BTS_CTR_CODEC_EFR));
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static uint8_t mdisc_by_msgtype(uint8_t msg_type)
|
|
{
|
|
/* mask off the transparent bit ? */
|
|
msg_type &= 0xfe;
|
|
|
|
if ((msg_type & 0xf0) == 0x00)
|
|
return ABIS_RSL_MDISC_RLL;
|
|
if ((msg_type & 0xf0) == 0x10) {
|
|
if (msg_type >= 0x19 && msg_type <= 0x22)
|
|
return ABIS_RSL_MDISC_TRX;
|
|
else
|
|
return ABIS_RSL_MDISC_COM_CHAN;
|
|
}
|
|
if ((msg_type & 0xe0) == 0x20)
|
|
return ABIS_RSL_MDISC_DED_CHAN;
|
|
|
|
return ABIS_RSL_MDISC_LOC;
|
|
}
|
|
|
|
static inline void init_dchan_hdr(struct abis_rsl_dchan_hdr *dh,
|
|
uint8_t msg_type)
|
|
{
|
|
dh->c.msg_discr = mdisc_by_msgtype(msg_type);
|
|
dh->c.msg_type = msg_type;
|
|
dh->ie_chan = RSL_IE_CHAN_NR;
|
|
}
|
|
|
|
/* call rsl_lchan_lookup and set the log context */
|
|
static struct gsm_lchan *lchan_lookup(struct gsm_bts_trx *trx, uint8_t chan_nr,
|
|
const char *log_name)
|
|
{
|
|
int rc;
|
|
struct gsm_lchan *lchan = rsl_lchan_lookup(trx, chan_nr, &rc);
|
|
|
|
if (!lchan) {
|
|
LOGP(DRSL, LOGL_ERROR, "%sunknown chan_nr=0x%02x\n",
|
|
log_name, chan_nr);
|
|
return NULL;
|
|
}
|
|
|
|
if (rc < 0)
|
|
LOGP(DRSL, LOGL_ERROR, "%s %smismatching chan_nr=0x%02x\n",
|
|
gsm_ts_and_pchan_name(lchan->ts), log_name, chan_nr);
|
|
|
|
return lchan;
|
|
}
|
|
|
|
static void pad_macblock(uint8_t *out, const uint8_t *in, int len)
|
|
{
|
|
memcpy(out, in, len);
|
|
|
|
if (len < GSM_MACBLOCK_LEN)
|
|
memset(out+len, 0x2b, GSM_MACBLOCK_LEN - len);
|
|
}
|
|
|
|
/* Chapter 9.3.7: Encryption Information
|
|
* Return negative on error, number of bytes written to 'out' on success.
|
|
* 'out' must provide room for 17 bytes. */
|
|
static int build_encr_info(uint8_t *out, struct gsm_lchan *lchan)
|
|
{
|
|
*out++ = lchan->encr.alg_id & 0xff;
|
|
switch (lchan->encr.alg_id) {
|
|
case GSM0808_ALG_ID_A5_1:
|
|
case GSM0808_ALG_ID_A5_2:
|
|
case GSM0808_ALG_ID_A5_3:
|
|
if (!lchan->encr.key_len) {
|
|
LOG_LCHAN(lchan, LOGL_ERROR, "A5/%d encryption chosen, but missing Kc\n", lchan->encr.alg_id);
|
|
return -EINVAL;
|
|
}
|
|
/* fall through */
|
|
case GSM0808_ALG_ID_A5_0:
|
|
/* When A5/0 is chosen, no encryption is active, so technically, no key is needed. However, 3GPP TS
|
|
* 48.058 9.3.7 Encryption Information stays quite silent about presence or absence of a key for A5/0.
|
|
* The only thing specified is how to indicate the length of the key; the possibility that the key may
|
|
* be zero length is not explicitly mentioned. So it seems that we should always send the key along,
|
|
* even for A5/0. Currently our ttcn3 test suite does expect the key to be present also for A5/0, see
|
|
* f_cipher_mode() in bsc/MSC_ConnectionHandler.ttcn. */
|
|
if (lchan->encr.key_len)
|
|
memcpy(out, lchan->encr.key, lchan->encr.key_len);
|
|
return 1 + lchan->encr.key_len;
|
|
|
|
case GSM0808_ALG_ID_A5_4:
|
|
if (!lchan->encr.kc128_present) {
|
|
LOG_LCHAN(lchan, LOGL_ERROR, "A5/4 encryption chosen, but missing Kc128\n");
|
|
return -EINVAL;
|
|
}
|
|
memcpy(out, lchan->encr.kc128, sizeof(lchan->encr.kc128));
|
|
return 1 + sizeof(lchan->encr.kc128);
|
|
|
|
default:
|
|
LOG_LCHAN(lchan, LOGL_ERROR, "A5/%d encryption not supported\n", lchan->encr.alg_id);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/* If the TLV contain an RSL Cause IE, return pointer to the cause value. If there is no Cause IE, return
|
|
* NULL. Implementation choice: presence of a Cause IE cannot be indicated by a zero cause, because that
|
|
* would mean RSL_ERR_RADIO_IF_FAIL; a pointer can return NULL or point to a cause value. */
|
|
static const uint8_t *rsl_cause(struct tlv_parsed *tp)
|
|
{
|
|
if (TLVP_PRESENT(tp, RSL_IE_CAUSE))
|
|
return (const uint8_t *)TLVP_VAL(tp, RSL_IE_CAUSE);
|
|
return NULL;
|
|
}
|
|
|
|
/* If the TLV contain an RSL Cause IE, return the RSL cause name; otherwise return "". */
|
|
static const char *rsl_cause_name(struct tlv_parsed *tp)
|
|
{
|
|
static char buf[128];
|
|
if (TLVP_PRESENT(tp, RSL_IE_CAUSE)) {
|
|
const uint8_t *cause = TLVP_VAL(tp, RSL_IE_CAUSE);
|
|
snprintf(buf, sizeof(buf), " (cause=%s [ %s])",
|
|
rsl_err_name(*cause),
|
|
osmo_hexdump(cause, TLVP_LEN(tp, RSL_IE_CAUSE)));
|
|
return buf;
|
|
} else
|
|
return "";
|
|
}
|
|
|
|
static void add_power_control_params(struct msgb *msg, enum abis_rsl_ie iei,
|
|
const struct gsm_lchan *lchan)
|
|
{
|
|
const struct gsm_bts *bts = lchan->ts->trx->bts;
|
|
const struct gsm_power_ctrl_params *cp;
|
|
|
|
/* Since {MS,BS}_POWER_PARAM IE content is operator dependent, it's not
|
|
* known how different BTS models will interpret an empty IE, so let's
|
|
* better skip sending it unless we know for sure what each expects. */
|
|
if (bts->model->power_ctrl_enc_rsl_params == NULL)
|
|
return;
|
|
|
|
if (iei == RSL_IE_MS_POWER_PARAM)
|
|
cp = &bts->ms_power_ctrl;
|
|
else
|
|
cp = &bts->bs_power_ctrl;
|
|
|
|
/* These parameters are only valid for dynamic mode */
|
|
if (cp->mode != GSM_PWR_CTRL_MODE_DYN_BTS)
|
|
return;
|
|
|
|
/* Put tag first, length will be updated later */
|
|
uint8_t *ie_len = msgb_tl_put(msg, iei);
|
|
uint8_t msg_len = msgb_length(msg);
|
|
|
|
if (bts->model->power_ctrl_enc_rsl_params(msg, cp) != 0) {
|
|
LOGP(DRSL, LOGL_ERROR, "Failed to encode MS/BS Power Control "
|
|
"parameters, omitting this IE (tag 0x%02x)\n", iei);
|
|
msgb_get(msg, msg_len - 2);
|
|
return;
|
|
}
|
|
|
|
/* Update length part of the containing IE */
|
|
*ie_len = msgb_length(msg) - msg_len;
|
|
}
|
|
|
|
/* Send a BCCH_INFO message as per Chapter 8.5.1 */
|
|
int rsl_bcch_info(const struct gsm_bts_trx *trx, enum osmo_sysinfo_type si_type, const uint8_t *data, int len)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
const struct gsm_bts *bts = trx->bts;
|
|
struct msgb *msg = rsl_msgb_alloc();
|
|
uint8_t type = osmo_sitype2rsl(si_type);
|
|
|
|
if (bts->c0 != trx)
|
|
LOGP(DRR, LOGL_ERROR, "Attempting to set BCCH SI%s on wrong BTS%u/TRX%u\n",
|
|
get_value_string(osmo_sitype_strs, si_type), bts->nr, trx->nr);
|
|
|
|
dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof*dh);
|
|
init_dchan_hdr(dh, RSL_MT_BCCH_INFO);
|
|
dh->chan_nr = RSL_CHAN_BCCH;
|
|
|
|
if (trx->bts->type == GSM_BTS_TYPE_RBS2000
|
|
&& type == RSL_SYSTEM_INFO_13) {
|
|
/* Ericsson proprietary encoding of SI13 */
|
|
msgb_tv_put(msg, RSL_IE_SYSINFO_TYPE, RSL_ERIC_SYSTEM_INFO_13);
|
|
if (data)
|
|
msgb_tlv_put(msg, RSL_IE_FULL_BCCH_INFO, len, data);
|
|
msgb_tv_put(msg, RSL_IE_ERIC_BCCH_MAPPING, 0x00);
|
|
} else {
|
|
/* Normal encoding */
|
|
msgb_tv_put(msg, RSL_IE_SYSINFO_TYPE, type);
|
|
if (data)
|
|
msgb_tlv_put(msg, RSL_IE_FULL_BCCH_INFO, len, data);
|
|
}
|
|
|
|
msg->dst = trx->rsl_link_primary;
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
int rsl_sacch_filling(struct gsm_bts_trx *trx, uint8_t type,
|
|
const uint8_t *data, int len)
|
|
{
|
|
struct abis_rsl_common_hdr *ch;
|
|
struct msgb *msg = rsl_msgb_alloc();
|
|
|
|
ch = (struct abis_rsl_common_hdr *) msgb_put(msg, sizeof(*ch));
|
|
ch->msg_discr = ABIS_RSL_MDISC_TRX;
|
|
ch->msg_type = RSL_MT_SACCH_FILL;
|
|
|
|
msgb_tv_put(msg, RSL_IE_SYSINFO_TYPE, type);
|
|
if (data)
|
|
msgb_tl16v_put(msg, RSL_IE_L3_INFO, len, data);
|
|
|
|
msg->dst = trx->rsl_link_primary;
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
int rsl_sacch_info_modify(struct gsm_lchan *lchan, uint8_t type,
|
|
const uint8_t *data, int len)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
struct msgb *msg;
|
|
int chan_nr = gsm_lchan2chan_nr(lchan, true);
|
|
if (chan_nr < 0)
|
|
return chan_nr;
|
|
|
|
msg = rsl_msgb_alloc();
|
|
|
|
dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
|
|
init_dchan_hdr(dh, RSL_MT_SACCH_INFO_MODIFY);
|
|
dh->chan_nr = chan_nr;
|
|
|
|
msgb_tv_put(msg, RSL_IE_SYSINFO_TYPE, type);
|
|
if (data)
|
|
msgb_tl16v_put(msg, RSL_IE_L3_INFO, len, data);
|
|
|
|
msg->dst = rsl_chan_link(lchan);
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
int rsl_chan_bs_power_ctrl(struct gsm_lchan *lchan, unsigned int fpc, int db)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
struct msgb *msg;
|
|
uint8_t bs_power_enc;
|
|
int chan_nr = gsm_lchan2chan_nr(lchan, true);
|
|
if (chan_nr < 0)
|
|
return chan_nr;
|
|
|
|
db = abs(db);
|
|
if (db > 30)
|
|
return -EINVAL;
|
|
|
|
msg = rsl_msgb_alloc();
|
|
|
|
bs_power_enc = db / 2;
|
|
if (fpc)
|
|
bs_power_enc |= 0x10;
|
|
|
|
dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
|
|
init_dchan_hdr(dh, RSL_MT_BS_POWER_CONTROL);
|
|
dh->chan_nr = chan_nr;
|
|
|
|
msgb_tv_put(msg, RSL_IE_BS_POWER, bs_power_enc);
|
|
|
|
/* BS Power Control Parameters (if supported by BTS model) */
|
|
add_power_control_params(msg, RSL_IE_BS_POWER_PARAM, lchan);
|
|
|
|
msg->dst = rsl_chan_link(lchan);
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
int rsl_chan_ms_power_ctrl(struct gsm_lchan *lchan)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
struct msgb *msg;
|
|
int chan_nr = gsm_lchan2chan_nr(lchan, true);
|
|
if (chan_nr < 0)
|
|
return chan_nr;
|
|
|
|
LOG_LCHAN(lchan, LOGL_DEBUG, "Tx MS POWER CONTROL (ms_power_lvl=%" PRIu8 ")\n",
|
|
lchan->ms_power);
|
|
|
|
msg = rsl_msgb_alloc();
|
|
|
|
dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
|
|
init_dchan_hdr(dh, RSL_MT_MS_POWER_CONTROL);
|
|
dh->chan_nr = chan_nr;
|
|
|
|
msgb_tv_put(msg, RSL_IE_MS_POWER, lchan->ms_power);
|
|
|
|
/* MS Power Control Parameters (if supported by BTS model) */
|
|
add_power_control_params(msg, RSL_IE_MS_POWER_PARAM, lchan);
|
|
|
|
msg->dst = rsl_chan_link(lchan);
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
static int channel_mode_from_lchan(struct rsl_ie_chan_mode *cm,
|
|
struct gsm_lchan *lchan,
|
|
const struct channel_mode_and_rate *ch_mode_rate,
|
|
bool vamos)
|
|
{
|
|
int rc;
|
|
memset(cm, 0, sizeof(*cm));
|
|
|
|
/* FIXME: what to do with data calls ? */
|
|
cm->dtx_dtu = 0;
|
|
if (lchan->ts->trx->bts->dtxu != GSM48_DTX_SHALL_NOT_BE_USED)
|
|
cm->dtx_dtu |= RSL_CMOD_DTXu;
|
|
if (lchan->ts->trx->bts->dtxd)
|
|
cm->dtx_dtu |= RSL_CMOD_DTXd;
|
|
|
|
/* set TCH Speech/Data */
|
|
rc = chan_mode_to_rsl_cmod_spd(ch_mode_rate->chan_mode);
|
|
if (rc < 0) {
|
|
LOGP(DRSL, LOGL_ERROR, "unsupported: chan_mode = 0x%02x\n", ch_mode_rate->chan_mode);
|
|
return rc;
|
|
}
|
|
cm->spd_ind = rc;
|
|
|
|
switch (lchan->type) {
|
|
case GSM_LCHAN_SDCCH:
|
|
cm->chan_rt = RSL_CMOD_CRT_SDCCH;
|
|
break;
|
|
case GSM_LCHAN_TCH_F:
|
|
cm->chan_rt = vamos ? RSL_CMOD_CRT_OSMO_TCH_VAMOS_Bm : RSL_CMOD_CRT_TCH_Bm;
|
|
break;
|
|
case GSM_LCHAN_TCH_H:
|
|
cm->chan_rt = vamos ? RSL_CMOD_CRT_OSMO_TCH_VAMOS_Lm : RSL_CMOD_CRT_TCH_Lm;
|
|
break;
|
|
case GSM_LCHAN_NONE:
|
|
case GSM_LCHAN_UNKNOWN:
|
|
default:
|
|
LOGP(DRSL, LOGL_ERROR,
|
|
"unsupported activation lchan->type %u %s\n",
|
|
lchan->type, gsm_lchant_name(lchan->type));
|
|
return -EINVAL;
|
|
}
|
|
|
|
switch (gsm48_chan_mode_to_non_vamos(ch_mode_rate->chan_mode)) {
|
|
case GSM48_CMODE_SIGN:
|
|
cm->chan_rate = 0;
|
|
break;
|
|
case GSM48_CMODE_SPEECH_V1:
|
|
cm->chan_rate = RSL_CMOD_SP_GSM1;
|
|
break;
|
|
case GSM48_CMODE_SPEECH_EFR:
|
|
cm->chan_rate = RSL_CMOD_SP_GSM2;
|
|
break;
|
|
case GSM48_CMODE_SPEECH_AMR:
|
|
cm->chan_rate = RSL_CMOD_SP_GSM3;
|
|
break;
|
|
case GSM48_CMODE_DATA_14k5:
|
|
case GSM48_CMODE_DATA_12k0:
|
|
case GSM48_CMODE_DATA_6k0:
|
|
switch (ch_mode_rate->csd_mode) {
|
|
case LCHAN_CSD_M_NT:
|
|
/* non-transparent CSD with RLP */
|
|
switch (ch_mode_rate->chan_mode) {
|
|
case GSM48_CMODE_DATA_14k5:
|
|
cm->chan_rate = RSL_CMOD_SP_NT_14k5;
|
|
break;
|
|
case GSM48_CMODE_DATA_12k0:
|
|
cm->chan_rate = RSL_CMOD_SP_NT_12k0;
|
|
break;
|
|
case GSM48_CMODE_DATA_6k0:
|
|
cm->chan_rate = RSL_CMOD_SP_NT_6k0;
|
|
break;
|
|
default:
|
|
LOGP(DRSL, LOGL_ERROR,
|
|
"unsupported lchan->tch_mode %u\n",
|
|
ch_mode_rate->chan_mode);
|
|
return -EINVAL;
|
|
}
|
|
break;
|
|
/* transparent data services below */
|
|
case LCHAN_CSD_M_T_1200_75:
|
|
cm->chan_rate = RSL_CMOD_CSD_T_1200_75;
|
|
break;
|
|
case LCHAN_CSD_M_T_600:
|
|
cm->chan_rate = RSL_CMOD_CSD_T_600;
|
|
break;
|
|
case LCHAN_CSD_M_T_1200:
|
|
cm->chan_rate = RSL_CMOD_CSD_T_1200;
|
|
break;
|
|
case LCHAN_CSD_M_T_2400:
|
|
cm->chan_rate = RSL_CMOD_CSD_T_2400;
|
|
break;
|
|
case LCHAN_CSD_M_T_9600:
|
|
cm->chan_rate = RSL_CMOD_CSD_T_9600;
|
|
break;
|
|
case LCHAN_CSD_M_T_14400:
|
|
cm->chan_rate = RSL_CMOD_CSD_T_14400;
|
|
break;
|
|
case LCHAN_CSD_M_T_29000:
|
|
cm->chan_rate = RSL_CMOD_CSD_T_29000;
|
|
break;
|
|
case LCHAN_CSD_M_T_32000:
|
|
cm->chan_rate = RSL_CMOD_CSD_T_32000;
|
|
break;
|
|
default:
|
|
LOGP(DRSL, LOGL_ERROR, "unsupported csd_mode %u\n", ch_mode_rate->csd_mode);
|
|
return -EINVAL;
|
|
}
|
|
break;
|
|
default:
|
|
LOGP(DRSL, LOGL_ERROR, "unsupported channel mode %u\n", ch_mode_rate->chan_mode);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int put_mr_config_for_bts(struct msgb *msg, const struct gsm48_multi_rate_conf *mr_conf_filtered,
|
|
const struct amr_multirate_conf *mr_modes)
|
|
{
|
|
msgb_put_u8(msg, RSL_IE_MR_CONFIG);
|
|
return gsm48_multirate_config(msg, mr_conf_filtered, mr_modes->bts_mode, mr_modes->num_modes);
|
|
}
|
|
|
|
/* indicate FACCH/SACCH Repetition to be performed by BTS,
|
|
* see also: 3GPP TS 44.006, section 10 and 11 */
|
|
static void rep_acch_cap_for_bts(struct gsm_lchan *lchan,
|
|
struct msgb *msg)
|
|
{
|
|
struct abis_rsl_osmo_rep_acch_cap *cap;
|
|
struct gsm_bts *bts = lchan->ts->trx->bts;
|
|
|
|
/* The RSL_IE_OSMO_REP_ACCH_CAP IE is a proprietary IE, that can only
|
|
* be used with osmo-bts type BTSs */
|
|
if (!(bts->model->type == GSM_BTS_TYPE_OSMOBTS
|
|
&& osmo_bts_has_feature(&bts->features, BTS_FEAT_ACCH_REP)))
|
|
return;
|
|
|
|
cap = (struct abis_rsl_osmo_rep_acch_cap*) msg->tail;
|
|
msgb_tlv_put(msg, RSL_IE_OSMO_REP_ACCH_CAP, sizeof(*cap),
|
|
(uint8_t*) &bts->repeated_acch_policy);
|
|
|
|
if (!(lchan->conn && lchan->conn->cm3_valid
|
|
&& lchan->conn->cm3.repeated_acch_capability)) {
|
|
/* MS supports only FACCH repetition for command frames, so
|
|
* we mask out all other features, even when they are enabled
|
|
* on this BTS. */
|
|
cap->dl_facch_all = 0;
|
|
cap->dl_sacch = 0;
|
|
cap->ul_sacch = 0;
|
|
}
|
|
}
|
|
|
|
/* Write RSL_IE_OSMO_TRAINING_SEQUENCE to msgb. The tsc_set argument's range is 1-4, tsc argument range is 0-7. */
|
|
static void put_osmo_training_sequence_ie(struct msgb *msg, uint8_t tsc_set, uint8_t tsc)
|
|
{
|
|
uint8_t *len = msgb_tl_put(msg, RSL_IE_OSMO_TRAINING_SEQUENCE);
|
|
*len = 2;
|
|
/* Convert from spec conforming "human readable" TSC Set 1-4 to 0-3 on the wire */
|
|
msgb_put_u8(msg, tsc_set - 1);
|
|
/* TSC is 0-7 both on the wire and in spec descriptions */
|
|
msgb_put_u8(msg, tsc);
|
|
}
|
|
|
|
/* Chapter 8.4.1 */
|
|
int rsl_tx_chan_activ(struct gsm_lchan *lchan, uint8_t act_type, uint8_t ho_ref)
|
|
{
|
|
struct gsm_bts_trx *trx = lchan->ts->trx;
|
|
struct gsm_bts *bts = trx->bts;
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
struct msgb *msg;
|
|
int rc;
|
|
uint8_t *len;
|
|
|
|
struct rsl_ie_chan_mode cm;
|
|
struct gsm48_chan_desc cd;
|
|
int chan_nr = gsm_lchan2chan_nr(lchan, true);
|
|
if (chan_nr < 0)
|
|
return chan_nr;
|
|
|
|
DEBUGP(DRSL, "%s Tx RSL Channel Activate with act_type=%s\n",
|
|
gsm_ts_and_pchan_name(lchan->ts),
|
|
rsl_act_type_name(act_type));
|
|
|
|
/* PDCH activation is a job for rsl_tx_dyn_ts_pdch_act_deact(); */
|
|
OSMO_ASSERT(act_type != RSL_ACT_OSMO_PDCH);
|
|
|
|
rc = channel_mode_from_lchan(&cm, lchan, &lchan->activate.ch_mode_rate, lchan->activate.info.vamos);
|
|
if (rc < 0) {
|
|
LOGP(DRSL, LOGL_ERROR,
|
|
"%s Cannot find channel mode from lchan type\n",
|
|
gsm_ts_and_pchan_name(lchan->ts));
|
|
return rc;
|
|
}
|
|
|
|
memset(&cd, 0, sizeof(cd));
|
|
rc = gsm48_lchan2chan_desc(&cd, lchan, lchan->activate.tsc, true);
|
|
if (rc) {
|
|
LOG_LCHAN(lchan, LOGL_ERROR, "Error encoding Channel Number\n");
|
|
return rc;
|
|
}
|
|
|
|
msg = rsl_msgb_alloc();
|
|
dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
|
|
init_dchan_hdr(dh, RSL_MT_CHAN_ACTIV);
|
|
|
|
dh->chan_nr = chan_nr;
|
|
|
|
msgb_tv_put(msg, RSL_IE_ACT_TYPE, act_type);
|
|
msgb_tlv_put(msg, RSL_IE_CHAN_MODE, sizeof(cm),
|
|
(uint8_t *) &cm);
|
|
|
|
/*
|
|
* The Channel Identification is needed for Phase1 phones
|
|
* and it contains the GSM48 Channel Description and the
|
|
* Mobile Allocation. The GSM 08.58 asks for the Mobile
|
|
* Allocation to have a length of zero. We are using the
|
|
* msgb_l3len to calculate the length of both messages.
|
|
*/
|
|
msgb_v_put(msg, RSL_IE_CHAN_IDENT);
|
|
len = msgb_put(msg, 1);
|
|
msgb_tv_fixed_put(msg, GSM48_IE_CHANDESC_2, sizeof(cd), (const uint8_t *) &cd);
|
|
|
|
/* See 3GPP TS 48.058 (version 15.0.0), section 9.3.5 "Channel Identification".
|
|
* The 3GPP TS 24.008 "Mobile Allocation" shall for compatibility reasons
|
|
* be included but empty, i.e. the length shall be zero. */
|
|
msgb_tlv_put(msg, GSM48_IE_MA_AFTER, 0, NULL);
|
|
|
|
/* update the calculated size */
|
|
msg->l3h = len + 1;
|
|
*len = msgb_l3len(msg);
|
|
|
|
if (lchan->encr.alg_id > RSL_ENC_ALG_A5(0)) {
|
|
uint8_t encr_info[MAX_A5_KEY_LEN+2];
|
|
rc = build_encr_info(encr_info, lchan);
|
|
if (rc > 0)
|
|
msgb_tlv_put(msg, RSL_IE_ENCR_INFO, rc, encr_info);
|
|
if (rc < 0) {
|
|
msgb_free(msg);
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
switch (act_type) {
|
|
case RSL_ACT_INTER_ASYNC:
|
|
case RSL_ACT_INTER_SYNC:
|
|
msgb_tv_put(msg, RSL_IE_HANDO_REF, ho_ref);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (bts->bs_power_ctrl.mode != GSM_PWR_CTRL_MODE_NONE)
|
|
msgb_tv_put(msg, RSL_IE_BS_POWER, lchan->bs_power_db / 2);
|
|
if (bts->ms_power_ctrl.mode != GSM_PWR_CTRL_MODE_NONE)
|
|
msgb_tv_put(msg, RSL_IE_MS_POWER, lchan->ms_power);
|
|
|
|
if (lchan->activate.info.ta_known) {
|
|
uint8_t ta = lchan->activate.info.ta;
|
|
/* BS11 requires TA shifted by 2 bits */
|
|
if (bts->type == GSM_BTS_TYPE_BS11)
|
|
ta <<= 2;
|
|
msgb_tv_put(msg, RSL_IE_TIMING_ADVANCE, ta);
|
|
}
|
|
|
|
/* BS/MS Power Control Parameters (if supported by BTS model) */
|
|
add_power_control_params(msg, RSL_IE_BS_POWER_PARAM, lchan);
|
|
add_power_control_params(msg, RSL_IE_MS_POWER_PARAM, lchan);
|
|
|
|
if (gsm48_chan_mode_to_non_vamos(lchan->activate.ch_mode_rate.chan_mode) == GSM48_CMODE_SPEECH_AMR) {
|
|
rc = put_mr_config_for_bts(msg, &lchan->activate.mr_conf_filtered,
|
|
(lchan->type == GSM_LCHAN_TCH_F) ? &bts->mr_full : &bts->mr_half);
|
|
if (rc) {
|
|
LOG_LCHAN(lchan, LOGL_ERROR, "Cannot encode MultiRate Configuration IE\n");
|
|
msgb_free(msg);
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
rep_acch_cap_for_bts(lchan, msg);
|
|
|
|
/* Selecting a specific TSC Set is only applicable to VAMOS mode */
|
|
if (lchan->activate.info.vamos && lchan->activate.tsc_set >= 1)
|
|
put_osmo_training_sequence_ie(msg, lchan->activate.tsc_set, lchan->activate.tsc);
|
|
|
|
msg->dst = rsl_chan_link(lchan);
|
|
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts->bts_ctrs, BTS_CTR_CHAN_ACT_TOTAL));
|
|
switch (lchan->type) {
|
|
case GSM_LCHAN_SDCCH:
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts->bts_ctrs, BTS_CTR_CHAN_ACT_SDCCH));
|
|
break;
|
|
case GSM_LCHAN_TCH_H:
|
|
case GSM_LCHAN_TCH_F:
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts->bts_ctrs, BTS_CTR_CHAN_ACT_TCH));
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
/* Chapter 8.4.9: Modify channel mode on BTS side */
|
|
int rsl_chan_mode_modify_req(struct gsm_lchan *lchan)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
struct msgb *msg;
|
|
int rc;
|
|
|
|
struct rsl_ie_chan_mode cm;
|
|
struct gsm_bts *bts = lchan->ts->trx->bts;
|
|
|
|
int chan_nr = gsm_lchan2chan_nr(lchan, true);
|
|
if (chan_nr < 0)
|
|
return chan_nr;
|
|
|
|
rc = channel_mode_from_lchan(&cm, lchan, &lchan->modify.ch_mode_rate, lchan->modify.info.vamos);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
msg = rsl_msgb_alloc();
|
|
dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
|
|
init_dchan_hdr(dh, RSL_MT_MODE_MODIFY_REQ);
|
|
dh->chan_nr = chan_nr;
|
|
|
|
msgb_tlv_put(msg, RSL_IE_CHAN_MODE, sizeof(cm),
|
|
(uint8_t *) &cm);
|
|
|
|
if (lchan->encr.alg_id > RSL_ENC_ALG_A5(0)) {
|
|
uint8_t encr_info[MAX_A5_KEY_LEN+2];
|
|
rc = build_encr_info(encr_info, lchan);
|
|
if (rc > 0)
|
|
msgb_tlv_put(msg, RSL_IE_ENCR_INFO, rc, encr_info);
|
|
if (rc < 0) {
|
|
msgb_free(msg);
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
if (gsm48_chan_mode_to_non_vamos(lchan->modify.ch_mode_rate.chan_mode) == GSM48_CMODE_SPEECH_AMR) {
|
|
rc = put_mr_config_for_bts(msg, &lchan->modify.mr_conf_filtered,
|
|
(lchan->type == GSM_LCHAN_TCH_F) ? &bts->mr_full : &bts->mr_half);
|
|
if (rc) {
|
|
LOG_LCHAN(lchan, LOGL_ERROR, "Cannot encode MultiRate Configuration IE\n");
|
|
msgb_free(msg);
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
rep_acch_cap_for_bts(lchan, msg);
|
|
|
|
/* Selecting a specific TSC Set is only applicable to VAMOS mode. Send this Osmocom specific IE only to OsmoBTS
|
|
* types. */
|
|
if (lchan->modify.info.vamos && lchan->modify.tsc_set >= 1 && bts->model->type == GSM_BTS_TYPE_OSMOBTS)
|
|
put_osmo_training_sequence_ie(msg, lchan->modify.tsc_set, lchan->modify.tsc);
|
|
|
|
msg->dst = rsl_chan_link(lchan);
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
/* Chapter 8.4.6: Send the encryption command with given L3 info */
|
|
int rsl_encryption_cmd(struct msgb *msg)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
struct gsm_lchan *lchan = msg->lchan;
|
|
uint8_t encr_info[MAX_A5_KEY_LEN+2];
|
|
uint8_t l3_len = msg->len;
|
|
int rc;
|
|
|
|
int chan_nr = gsm_lchan2chan_nr(lchan, true);
|
|
if (chan_nr < 0)
|
|
return chan_nr;
|
|
|
|
/* First push the L3 IE tag and length */
|
|
msgb_tv16_push(msg, RSL_IE_L3_INFO, l3_len);
|
|
|
|
/* then the link identifier (SAPI0, main sign link) */
|
|
msgb_tv_push(msg, RSL_IE_LINK_IDENT, 0);
|
|
|
|
/* then encryption information */
|
|
rc = build_encr_info(encr_info, lchan);
|
|
if (rc <= 0)
|
|
return rc;
|
|
msgb_tlv_push(msg, RSL_IE_ENCR_INFO, rc, encr_info);
|
|
|
|
/* and finally the DCHAN header */
|
|
dh = (struct abis_rsl_dchan_hdr *) msgb_push(msg, sizeof(*dh));
|
|
init_dchan_hdr(dh, RSL_MT_ENCR_CMD);
|
|
dh->chan_nr = chan_nr;
|
|
|
|
msg->dst = rsl_chan_link(lchan);
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
/* Chapter 8.4.5 / 4.6: Deactivate the SACCH after 04.08 RR CHAN RELEASE */
|
|
int rsl_deact_sacch(struct gsm_lchan *lchan)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
struct msgb *msg = rsl_msgb_alloc();
|
|
|
|
int chan_nr = gsm_lchan2chan_nr(lchan, true);
|
|
if (chan_nr < 0)
|
|
return chan_nr;
|
|
|
|
dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
|
|
init_dchan_hdr(dh, RSL_MT_DEACTIVATE_SACCH);
|
|
dh->chan_nr = chan_nr;
|
|
|
|
msg->lchan = lchan;
|
|
msg->dst = rsl_chan_link(lchan);
|
|
|
|
DEBUGP(DRSL, "%s DEACTivate SACCH CMD\n", gsm_lchan_name(lchan));
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
/* Chapter 8.4.14 / 4.7: Tell BTS to release the radio channel */
|
|
int rsl_tx_rf_chan_release(struct gsm_lchan *lchan)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
struct msgb *msg;
|
|
|
|
int chan_nr = gsm_lchan2chan_nr(lchan, true);
|
|
if (chan_nr < 0)
|
|
return chan_nr;
|
|
|
|
msg = rsl_msgb_alloc();
|
|
dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
|
|
init_dchan_hdr(dh, RSL_MT_RF_CHAN_REL);
|
|
dh->chan_nr = chan_nr;
|
|
|
|
msg->lchan = lchan;
|
|
msg->dst = rsl_chan_link(lchan);
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
int rsl_paging_cmd(struct gsm_bts *bts, uint8_t paging_group,
|
|
const struct osmo_mobile_identity *mi,
|
|
uint8_t chan_needed, bool is_gprs)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
struct msgb *msg = rsl_msgb_alloc();
|
|
uint8_t *l;
|
|
int rc;
|
|
|
|
dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
|
|
init_dchan_hdr(dh, RSL_MT_PAGING_CMD);
|
|
dh->chan_nr = RSL_CHAN_PCH_AGCH;
|
|
|
|
msgb_tv_put(msg, RSL_IE_PAGING_GROUP, paging_group);
|
|
|
|
l = msgb_tl_put(msg, RSL_IE_MS_IDENTITY);
|
|
rc = osmo_mobile_identity_encode_msgb(msg, mi, false);
|
|
if (rc < 0) {
|
|
msgb_free(msg);
|
|
return -EINVAL;
|
|
}
|
|
*l = rc;
|
|
|
|
msgb_tv_put(msg, RSL_IE_CHAN_NEEDED, chan_needed);
|
|
|
|
/* Ericsson wants to have this IE in case a paging message
|
|
* relates to packet paging */
|
|
if (bts->type == GSM_BTS_TYPE_RBS2000 && is_gprs)
|
|
msgb_tv_put(msg, RSL_IE_ERIC_PACKET_PAG_IND, 0);
|
|
|
|
msg->dst = bts->c0->rsl_link_primary;
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
int rsl_forward_layer3_info(struct gsm_lchan *lchan, const uint8_t *l3_info, uint8_t l3_info_len)
|
|
{
|
|
struct msgb *msg;
|
|
|
|
if (!l3_info || !l3_info_len)
|
|
return -EINVAL;
|
|
|
|
msg = rsl_msgb_alloc();
|
|
msg->l3h = msgb_put(msg, l3_info_len);
|
|
memcpy(msg->l3h, l3_info, l3_info_len);
|
|
|
|
msg->lchan = lchan;
|
|
return rsl_data_request(msg, 0);
|
|
}
|
|
|
|
int imsi_str2bcd(uint8_t *bcd_out, const char *str_in)
|
|
{
|
|
int i, len = strlen(str_in);
|
|
|
|
for (i = 0; i < len; i++) {
|
|
int num = str_in[i] - 0x30;
|
|
if (num < 0 || num > 9)
|
|
return -1;
|
|
if (i % 2 == 0)
|
|
bcd_out[i/2] = num;
|
|
else
|
|
bcd_out[i/2] |= (num << 4);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Chapter 8.5.6 */
|
|
struct msgb *rsl_imm_assign_cmd_common(struct gsm_bts *bts, uint8_t len, uint8_t *val)
|
|
{
|
|
struct msgb *msg = rsl_msgb_alloc();
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
uint8_t buf[GSM_MACBLOCK_LEN];
|
|
|
|
dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
|
|
init_dchan_hdr(dh, RSL_MT_IMMEDIATE_ASSIGN_CMD);
|
|
dh->chan_nr = RSL_CHAN_PCH_AGCH;
|
|
|
|
switch (bts->type) {
|
|
case GSM_BTS_TYPE_BS11:
|
|
msgb_tlv_put(msg, RSL_IE_IMM_ASS_INFO, len, val);
|
|
break;
|
|
default:
|
|
/* If phase 2, construct a FULL_IMM_ASS_INFO */
|
|
pad_macblock(buf, val, len);
|
|
msgb_tlv_put(msg, RSL_IE_FULL_IMM_ASS_INFO, GSM_MACBLOCK_LEN,
|
|
buf);
|
|
break;
|
|
}
|
|
|
|
msg->dst = bts->c0->rsl_link_primary;
|
|
return msg;
|
|
}
|
|
|
|
/* Chapter 8.5.6 */
|
|
int rsl_imm_assign_cmd(struct gsm_bts *bts, uint8_t len, uint8_t *val)
|
|
{
|
|
struct msgb *msg = rsl_imm_assign_cmd_common(bts, len, val);
|
|
if (!msg)
|
|
return 1;
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
/* Chapter 8.5.6 */
|
|
int rsl_ericsson_imm_assign_cmd(struct gsm_bts *bts, uint32_t tlli, uint8_t len, uint8_t *val)
|
|
{
|
|
struct msgb *msg = rsl_imm_assign_cmd_common(bts, len, val);
|
|
if (!msg)
|
|
return 1;
|
|
|
|
/* ericsson can handle a reference at the end of the message which is used in
|
|
* the confirm message. The confirm message is only sent if the trailer is present */
|
|
msgb_put_u8(msg, RSL_IE_ERIC_MOBILE_ID);
|
|
msgb_put_u32(msg, tlli);
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
/* Send Siemens specific MS RF Power Capability Indication */
|
|
int rsl_siemens_mrpci(struct gsm_lchan *lchan, struct rsl_mrpci *mrpci)
|
|
{
|
|
struct msgb *msg;
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
|
|
int chan_nr = gsm_lchan2chan_nr(lchan, true);
|
|
if (chan_nr < 0)
|
|
return chan_nr;
|
|
|
|
msg = rsl_msgb_alloc();
|
|
|
|
dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
|
|
init_dchan_hdr(dh, RSL_MT_SIEMENS_MRPCI);
|
|
dh->c.msg_discr = ABIS_RSL_MDISC_DED_CHAN;
|
|
dh->chan_nr = chan_nr;
|
|
msgb_tv_put(msg, RSL_IE_SIEMENS_MRPCI, *(uint8_t *)mrpci);
|
|
|
|
DEBUGP(DRSL, "%s TX Siemens MRPCI 0x%02x\n",
|
|
gsm_lchan_name(lchan), *(uint8_t *)mrpci);
|
|
|
|
msg->dst = rsl_chan_link(lchan);
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
|
|
/* Send "DATA REQUEST" message with given L3 Info payload */
|
|
/* Chapter 8.3.1 */
|
|
int rsl_data_request(struct msgb *msg, uint8_t link_id)
|
|
{
|
|
int chan_nr;
|
|
|
|
if (msg->lchan == NULL) {
|
|
LOGP(DRSL, LOGL_ERROR, "cannot send DATA REQUEST to unknown lchan\n");
|
|
msgb_free(msg);
|
|
return -EINVAL;
|
|
}
|
|
|
|
chan_nr = gsm_lchan2chan_nr(msg->lchan, true);
|
|
if (chan_nr < 0) {
|
|
msgb_free(msg);
|
|
return chan_nr;
|
|
}
|
|
|
|
rsl_rll_push_l3(msg, RSL_MT_DATA_REQ, chan_nr, link_id, 1);
|
|
|
|
msg->dst = rsl_chan_link(msg->lchan);
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
/* Send "ESTABLISH REQUEST" message with given L3 Info payload */
|
|
/* Chapter 8.3.1 */
|
|
int rsl_establish_request(struct gsm_lchan *lchan, uint8_t link_id)
|
|
{
|
|
struct msgb *msg;
|
|
int chan_nr = gsm_lchan2chan_nr(lchan, true);
|
|
if (chan_nr < 0)
|
|
return chan_nr;
|
|
|
|
msg = rsl_rll_simple(RSL_MT_EST_REQ, chan_nr, link_id, 0);
|
|
msg->dst = rsl_chan_link(lchan);
|
|
|
|
DEBUGP(DRLL, "%s RSL RLL ESTABLISH REQ (link_id=0x%02x)\n",
|
|
gsm_lchan_name(lchan), link_id);
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
/* Chapter 8.3.7 Request the release of multiframe mode of RLL connection.
|
|
This is what higher layers should call. The BTS then responds with
|
|
RELEASE CONFIRM, which we in turn use to trigger RSL CHANNEL RELEASE,
|
|
which in turn is acknowledged by RSL CHANNEL RELEASE ACK, which calls
|
|
lchan_free() */
|
|
int rsl_release_request(struct gsm_lchan *lchan, uint8_t link_id,
|
|
enum rsl_rel_mode release_mode)
|
|
{
|
|
|
|
struct msgb *msg;
|
|
int chan_nr = gsm_lchan2chan_nr(lchan, true);
|
|
if (chan_nr < 0)
|
|
return chan_nr;
|
|
|
|
msg = rsl_rll_simple(RSL_MT_REL_REQ, chan_nr, link_id, 0);
|
|
/* 0 is normal release, 1 is local end */
|
|
msgb_tv_put(msg, RSL_IE_RELEASE_MODE, release_mode);
|
|
|
|
msg->dst = rsl_chan_link(lchan);
|
|
|
|
DEBUGP(DRLL, "%s RSL RLL RELEASE REQ (link_id=0x%02x, reason=%u)\n",
|
|
gsm_lchan_name(lchan), link_id, release_mode);
|
|
|
|
abis_rsl_sendmsg(msg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool msg_for_osmocom_dyn_ts(struct msgb *msg)
|
|
{
|
|
struct abis_rsl_dchan_hdr *rslh = msgb_l2(msg);
|
|
if (msg->lchan->ts->pchan_on_init != GSM_PCHAN_TCH_F_TCH_H_PDCH)
|
|
return false;
|
|
/* dyn TS messages always come in on the first lchan of a timeslot */
|
|
if (msg->lchan->nr != 0)
|
|
return false;
|
|
return (rslh->chan_nr & RSL_CHAN_OSMO_PDCH) == RSL_CHAN_OSMO_PDCH;
|
|
}
|
|
|
|
/* Chapter 8.4.3: Channel Activate NACK */
|
|
static int rsl_rx_chan_act_nack(struct msgb *msg)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh = msgb_l2(msg);
|
|
struct tlv_parsed tp;
|
|
struct gsm_lchan *lchan = msg->lchan;
|
|
const uint8_t *cause_p;
|
|
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(msg->lchan->ts->trx->bts->bts_ctrs, BTS_CTR_CHAN_ACT_NACK));
|
|
|
|
if (dh->ie_chan != RSL_IE_CHAN_NR) {
|
|
LOG_LCHAN(msg->lchan, LOGL_ERROR, "Invalid IE: expected CHAN_NR IE (0x%x), got 0x%x\n",
|
|
RSL_IE_CHAN_NR, dh->ie_chan);
|
|
return -EINVAL;
|
|
}
|
|
|
|
rsl_tlv_parse(&tp, dh->data, msgb_l2len(msg)-sizeof(*dh));
|
|
cause_p = rsl_cause(&tp);
|
|
LOG_LCHAN(lchan, LOGL_ERROR, "CHANNEL ACTIVATE NACK%s\n", rsl_cause_name(&tp));
|
|
|
|
if (msg_for_osmocom_dyn_ts(msg))
|
|
osmo_fsm_inst_dispatch(lchan->ts->fi, TS_EV_PDCH_ACT_NACK, (void*)cause_p);
|
|
else
|
|
osmo_fsm_inst_dispatch(lchan->fi, LCHAN_EV_RSL_CHAN_ACTIV_NACK, (void*)cause_p);
|
|
return 0;
|
|
}
|
|
|
|
/* Chapter 8.4.4: Connection Failure Indication */
|
|
static int rsl_rx_conn_fail(struct msgb *msg)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh = msgb_l2(msg);
|
|
struct gsm_lchan *lchan = msg->lchan;
|
|
struct rate_ctr_group *bts_ctrs = lchan->ts->trx->bts->bts_ctrs;
|
|
struct tlv_parsed tp;
|
|
const uint8_t *cause_p;
|
|
|
|
rsl_tlv_parse(&tp, dh->data, msgb_l2len(msg)-sizeof(*dh));
|
|
cause_p = rsl_cause(&tp);
|
|
|
|
LOG_LCHAN(lchan, LOGL_ERROR, "CONNECTION FAIL%s\n", rsl_cause_name(&tp));
|
|
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts_ctrs, BTS_CTR_CHAN_RF_FAIL));
|
|
switch (lchan->type) {
|
|
case GSM_LCHAN_SDCCH:
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts_ctrs, BTS_CTR_CHAN_RF_FAIL_SDCCH));
|
|
break;
|
|
case GSM_LCHAN_TCH_H:
|
|
case GSM_LCHAN_TCH_F:
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts_ctrs, BTS_CTR_CHAN_RF_FAIL_TCH));
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* If the lchan is associated with a conn, we shall notify the MSC of the RSL Conn Failure, and
|
|
* the connection will presumably be torn down and lead to an lchan release. During initial
|
|
* Channel Request from the MS, an lchan has no conn yet, so in that case release now. */
|
|
if (!lchan->conn)
|
|
lchan_release(lchan, false, true, *cause_p, NULL);
|
|
else
|
|
osmo_fsm_inst_dispatch(lchan->conn->fi, GSCON_EV_RSL_CONN_FAIL, (void*)cause_p);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void print_meas_rep_uni(struct osmo_strbuf *sb, struct gsm_meas_rep_unidir *mru, const char *prefix)
|
|
{
|
|
OSMO_STRBUF_PRINTF(*sb, "RXL-FULL-%s=%3ddBm RXL-SUB-%s=%3ddBm ",
|
|
prefix, rxlev2dbm(mru->full.rx_lev),
|
|
prefix, rxlev2dbm(mru->sub.rx_lev));
|
|
OSMO_STRBUF_PRINTF(*sb, "RXQ-FULL-%s=%d RXQ-SUB-%s=%d ",
|
|
prefix, mru->full.rx_qual, prefix, mru->sub.rx_qual);
|
|
}
|
|
|
|
static int print_meas_rep_buf(char *buf, size_t len, struct gsm_lchan *lchan, struct gsm_meas_rep *mr)
|
|
{
|
|
const char *name = "";
|
|
struct bsc_subscr *bsub = NULL;
|
|
struct osmo_strbuf sb = { .buf = buf, .len = len };
|
|
|
|
if (lchan && lchan->conn) {
|
|
bsub = lchan->conn->bsub;
|
|
if (bsub) {
|
|
name = bsc_subscr_name(bsub);
|
|
} else
|
|
name = lchan->name;
|
|
}
|
|
|
|
OSMO_STRBUF_PRINTF(sb, "[%s] MEASUREMENT RESULT NR=%d ", name, mr->nr);
|
|
|
|
if (mr->flags & MEAS_REP_F_DL_DTX)
|
|
OSMO_STRBUF_PRINTF(sb, "DTXd ");
|
|
|
|
print_meas_rep_uni(&sb, &mr->ul, "ul");
|
|
OSMO_STRBUF_PRINTF(sb, "BS_POWER=%ddB ", mr->bs_power_db);
|
|
|
|
if (mr->flags & MEAS_REP_F_MS_TO)
|
|
OSMO_STRBUF_PRINTF(sb, "MS_TO=%d ", mr->ms_timing_offset);
|
|
|
|
if (mr->flags & MEAS_REP_F_MS_L1) {
|
|
OSMO_STRBUF_PRINTF(sb, "L1_MS_PWR=%3ddBm ", mr->ms_l1.pwr);
|
|
OSMO_STRBUF_PRINTF(sb, "L1_FPC=%u ", mr->flags & MEAS_REP_F_FPC ? 1 : 0);
|
|
OSMO_STRBUF_PRINTF(sb, "L1_TA=%u ", mr->ms_l1.ta);
|
|
}
|
|
|
|
if (mr->flags & MEAS_REP_F_UL_DTX)
|
|
OSMO_STRBUF_PRINTF(sb, "DTXu ");
|
|
if (mr->flags & MEAS_REP_F_BA1)
|
|
OSMO_STRBUF_PRINTF(sb, "BA1 ");
|
|
if (!(mr->flags & MEAS_REP_F_DL_VALID))
|
|
OSMO_STRBUF_PRINTF(sb, "NOT VALID ");
|
|
else
|
|
print_meas_rep_uni(&sb, &mr->dl, "dl");
|
|
|
|
OSMO_STRBUF_PRINTF(sb, "NUM_NEIGH=%u", mr->num_cell);
|
|
|
|
return sb.chars_needed;
|
|
}
|
|
|
|
static char *print_meas_rep_c(void *ctx, struct gsm_lchan *lchan, struct gsm_meas_rep *mr)
|
|
{
|
|
/* A naive count of required characters gets me to ~200, so 256 should be safe to get a large enough buffer on
|
|
* the first time. */
|
|
OSMO_NAME_C_IMPL(ctx, 256, "ERROR", print_meas_rep_buf, lchan, mr)
|
|
}
|
|
|
|
static void print_meas_rep(struct gsm_lchan *lchan, struct gsm_meas_rep *mr)
|
|
{
|
|
int i;
|
|
struct bsc_subscr *bsub = NULL;
|
|
|
|
if (lchan && lchan->conn) {
|
|
bsub = lchan->conn->bsub;
|
|
if (bsub)
|
|
log_set_context(LOG_CTX_BSC_SUBSCR, bsub);
|
|
}
|
|
|
|
DEBUGP(DMEAS, "%s\n", print_meas_rep_c(OTC_SELECT, lchan, mr));
|
|
|
|
if (mr->num_cell != 7
|
|
&& log_check_level(DMEAS, LOGL_DEBUG)) {
|
|
for (i = 0; i < mr->num_cell; i++) {
|
|
struct gsm_meas_rep_cell *mrc = &mr->cell[i];
|
|
DEBUGP(DMEAS, "IDX=%u ARFCN=%u BSIC=%u => %d dBm\n",
|
|
mrc->neigh_idx, mrc->arfcn, mrc->bsic, rxlev2dbm(mrc->rxlev));
|
|
}
|
|
}
|
|
|
|
if (bsub)
|
|
log_set_context(LOG_CTX_BSC_SUBSCR, NULL);
|
|
}
|
|
|
|
static struct gsm_meas_rep *lchan_next_meas_rep(struct gsm_lchan *lchan)
|
|
{
|
|
struct gsm_meas_rep *meas_rep;
|
|
|
|
meas_rep = &lchan->meas_rep[lchan->meas_rep_idx];
|
|
memset(meas_rep, 0, sizeof(*meas_rep));
|
|
meas_rep->lchan = lchan;
|
|
lchan->meas_rep_idx = (lchan->meas_rep_idx + 1)
|
|
% ARRAY_SIZE(lchan->meas_rep);
|
|
|
|
return meas_rep;
|
|
}
|
|
|
|
static int rsl_rx_meas_res(struct msgb *msg)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh = msgb_l2(msg);
|
|
struct tlv_parsed tp;
|
|
struct gsm_meas_rep *mr = lchan_next_meas_rep(msg->lchan);
|
|
uint8_t len;
|
|
const uint8_t *val;
|
|
int rc;
|
|
uint8_t bs_power_enc;
|
|
|
|
if (!lchan_may_receive_data(msg->lchan)) {
|
|
LOG_LCHAN(msg->lchan, LOGL_DEBUG, "MEAS RES for inactive channel\n");
|
|
return 0;
|
|
}
|
|
|
|
memset(mr, 0, sizeof(*mr));
|
|
mr->lchan = msg->lchan;
|
|
|
|
rsl_tlv_parse(&tp, dh->data, msgb_l2len(msg)-sizeof(*dh));
|
|
|
|
if (!TLVP_PRESENT(&tp, RSL_IE_MEAS_RES_NR) ||
|
|
!TLVP_PRESENT(&tp, RSL_IE_UPLINK_MEAS) ||
|
|
!TLVP_PRESENT(&tp, RSL_IE_BS_POWER)) {
|
|
LOGP(DRSL, LOGL_ERROR, "%s Measurement Report lacks mandatory IEs\n",
|
|
gsm_lchan_name(mr->lchan));
|
|
return -EIO;
|
|
}
|
|
|
|
/* Mandatory Parts */
|
|
mr->nr = *TLVP_VAL(&tp, RSL_IE_MEAS_RES_NR);
|
|
|
|
len = TLVP_LEN(&tp, RSL_IE_UPLINK_MEAS);
|
|
val = TLVP_VAL(&tp, RSL_IE_UPLINK_MEAS);
|
|
if (len >= 3) {
|
|
if (val[0] & 0x40)
|
|
mr->flags |= MEAS_REP_F_DL_DTX;
|
|
mr->ul.full.rx_lev = val[0] & 0x3f;
|
|
mr->ul.sub.rx_lev = val[1] & 0x3f;
|
|
mr->ul.full.rx_qual = val[2]>>3 & 0x7;
|
|
mr->ul.sub.rx_qual = val[2] & 0x7;
|
|
}
|
|
|
|
bs_power_enc = *TLVP_VAL(&tp, RSL_IE_BS_POWER);
|
|
mr->bs_power_db = (bs_power_enc & 0x0f) * 2;
|
|
|
|
/* Optional Parts */
|
|
if (TLVP_PRESENT(&tp, RSL_IE_MS_TIMING_OFFSET)) {
|
|
/* According to 3GPP TS 48.058 § MS Timing Offset = Timing Offset field - 63 */
|
|
mr->ms_timing_offset = *TLVP_VAL(&tp, RSL_IE_MS_TIMING_OFFSET) - 63;
|
|
mr->flags |= MEAS_REP_F_MS_TO;
|
|
}
|
|
|
|
if (TLVP_PRESENT(&tp, RSL_IE_L1_INFO)) {
|
|
struct e1inp_sign_link *sign_link = msg->dst;
|
|
|
|
val = TLVP_VAL(&tp, RSL_IE_L1_INFO);
|
|
mr->flags |= MEAS_REP_F_MS_L1;
|
|
mr->ms_l1.pwr = ms_pwr_dbm(sign_link->trx->bts->band, val[0] >> 3);
|
|
if (val[0] & 0x04)
|
|
mr->flags |= MEAS_REP_F_FPC;
|
|
mr->ms_l1.ta = val[1];
|
|
/* BS11 and Nokia reports TA shifted by 2 bits */
|
|
if (msg->lchan->ts->trx->bts->type == GSM_BTS_TYPE_BS11
|
|
|| msg->lchan->ts->trx->bts->type == GSM_BTS_TYPE_NOKIA_SITE)
|
|
mr->ms_l1.ta >>= 2;
|
|
/* store TA for handover decision, and for intra-cell re-assignment */
|
|
mr->lchan->last_ta = mr->ms_l1.ta;
|
|
}
|
|
if (TLVP_PRESENT(&tp, RSL_IE_L3_INFO)) {
|
|
msg->l3h = (uint8_t *) TLVP_VAL(&tp, RSL_IE_L3_INFO);
|
|
rc = gsm48_parse_meas_rep(mr, msg);
|
|
if (rc < 0)
|
|
return rc;
|
|
}
|
|
|
|
mr->lchan->meas_rep_count++;
|
|
mr->lchan->meas_rep_last_seen_nr = mr->nr;
|
|
LOGP(DRSL, LOGL_DEBUG, "%s: meas_rep_count++=%d meas_rep_last_seen_nr=%u\n",
|
|
gsm_lchan_name(mr->lchan), mr->lchan->meas_rep_count, mr->lchan->meas_rep_last_seen_nr);
|
|
|
|
print_meas_rep(msg->lchan, mr);
|
|
|
|
send_lchan_signal(S_LCHAN_MEAS_REP, msg->lchan, mr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Chapter 8.4.7 */
|
|
static int rsl_rx_hando_det(struct msgb *msg)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh = msgb_l2(msg);
|
|
struct tlv_parsed tp;
|
|
struct handover_rr_detect_data d = {
|
|
.msg = msg,
|
|
};
|
|
|
|
rsl_tlv_parse(&tp, dh->data, msgb_l2len(msg)-sizeof(*dh));
|
|
|
|
if (TLVP_PRESENT(&tp, RSL_IE_ACCESS_DELAY))
|
|
d.access_delay = TLVP_VAL(&tp, RSL_IE_ACCESS_DELAY);
|
|
|
|
if (!msg->lchan->conn || !msg->lchan->conn->ho.fi) {
|
|
LOGP(DRSL, LOGL_ERROR, "%s HANDOVER DETECT but no handover is ongoing\n",
|
|
gsm_lchan_name(msg->lchan));
|
|
return 0;
|
|
}
|
|
|
|
osmo_fsm_inst_dispatch(msg->lchan->conn->ho.fi, HO_EV_RR_HO_DETECT, &d);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rsl_rx_ipacc_pdch(struct msgb *msg, char *name, uint32_t ts_ev)
|
|
{
|
|
struct gsm_bts_trx_ts *ts = msg->lchan->ts;
|
|
|
|
if (ts->pchan_on_init != GSM_PCHAN_TCH_F_PDCH) {
|
|
LOG_TS(ts, LOGL_ERROR, "Rx RSL ip.access PDCH %s acceptable only for %s\n",
|
|
name, gsm_pchan_name(GSM_PCHAN_TCH_F_PDCH));
|
|
return -EINVAL;
|
|
}
|
|
|
|
osmo_fsm_inst_dispatch(ts->fi, ts_ev, NULL);
|
|
return 0;
|
|
}
|
|
|
|
static int abis_rsl_rx_dchan(struct msgb *msg)
|
|
{
|
|
struct abis_rsl_dchan_hdr *rslh = msgb_l2(msg);
|
|
int rc = 0;
|
|
struct e1inp_sign_link *sign_link = msg->dst;
|
|
|
|
if (rslh->ie_chan != RSL_IE_CHAN_NR) {
|
|
LOGP(DRSL, LOGL_ERROR,
|
|
"Rx RSL DCHAN: invalid RSL header, expecting Channel Number IE tag, got 0x%x\n",
|
|
rslh->ie_chan);
|
|
return -EINVAL;
|
|
}
|
|
|
|
msg->lchan = lchan_lookup(sign_link->trx, rslh->chan_nr,
|
|
"Abis RSL rx DCHAN: ");
|
|
if (!msg->lchan) {
|
|
LOGP(DRSL, LOGL_ERROR,
|
|
"Rx RSL DCHAN: unable to match RSL message to an lchan: chan_nr=0x%x\n",
|
|
rslh->chan_nr);
|
|
return -EINVAL;
|
|
}
|
|
|
|
LOG_LCHAN(msg->lchan, LOGL_DEBUG, "Rx %s\n", rsl_or_ipac_msg_name(rslh->c.msg_type));
|
|
|
|
if (!msg->lchan->fi) {
|
|
LOG_LCHAN(msg->lchan, LOGL_ERROR, "Rx RSL DCHAN: RSL message for unconfigured lchan\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
switch (rslh->c.msg_type) {
|
|
case RSL_MT_CHAN_ACTIV_ACK:
|
|
if (msg_for_osmocom_dyn_ts(msg))
|
|
osmo_fsm_inst_dispatch(msg->lchan->ts->fi, TS_EV_PDCH_ACT_ACK, NULL);
|
|
else {
|
|
osmo_fsm_inst_dispatch(msg->lchan->fi, LCHAN_EV_RSL_CHAN_ACTIV_ACK, NULL);
|
|
count_codecs(sign_link->trx->bts, msg->lchan);
|
|
}
|
|
break;
|
|
case RSL_MT_CHAN_ACTIV_NACK:
|
|
rc = rsl_rx_chan_act_nack(msg);
|
|
break;
|
|
case RSL_MT_CONN_FAIL:
|
|
rc = rsl_rx_conn_fail(msg);
|
|
break;
|
|
case RSL_MT_MEAS_RES:
|
|
rc = rsl_rx_meas_res(msg);
|
|
break;
|
|
case RSL_MT_HANDO_DET:
|
|
rc = rsl_rx_hando_det(msg);
|
|
break;
|
|
case RSL_MT_RF_CHAN_REL_ACK:
|
|
if (msg_for_osmocom_dyn_ts(msg))
|
|
osmo_fsm_inst_dispatch(msg->lchan->ts->fi, TS_EV_PDCH_DEACT_ACK, NULL);
|
|
else
|
|
osmo_fsm_inst_dispatch(msg->lchan->fi, LCHAN_EV_RSL_RF_CHAN_REL_ACK, NULL);
|
|
break;
|
|
case RSL_MT_MODE_MODIFY_ACK:
|
|
LOG_LCHAN(msg->lchan, LOGL_DEBUG, "CHANNEL MODE MODIFY ACK\n");
|
|
count_codecs(sign_link->trx->bts, msg->lchan);
|
|
osmo_fsm_inst_dispatch(msg->lchan->fi, LCHAN_EV_RSL_CHAN_MODE_MODIFY_ACK, NULL);
|
|
break;
|
|
case RSL_MT_MODE_MODIFY_NACK:
|
|
LOG_LCHAN(msg->lchan, LOGL_DEBUG, "CHANNEL MODE MODIFY NACK\n");
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(sign_link->trx->bts->bts_ctrs, BTS_CTR_MODE_MODIFY_NACK));
|
|
osmo_fsm_inst_dispatch(msg->lchan->fi, LCHAN_EV_RSL_CHAN_MODE_MODIFY_NACK, NULL);
|
|
break;
|
|
case RSL_MT_IPAC_PDCH_ACT_ACK:
|
|
rc = rsl_rx_ipacc_pdch(msg, "ACT ACK", TS_EV_PDCH_ACT_ACK);
|
|
break;
|
|
case RSL_MT_IPAC_PDCH_ACT_NACK:
|
|
rc = rsl_rx_ipacc_pdch(msg, "ACT NACK", TS_EV_PDCH_ACT_NACK);
|
|
break;
|
|
case RSL_MT_IPAC_PDCH_DEACT_ACK:
|
|
rc = rsl_rx_ipacc_pdch(msg, "DEACT ACK", TS_EV_PDCH_DEACT_ACK);
|
|
break;
|
|
case RSL_MT_IPAC_PDCH_DEACT_NACK:
|
|
rc = rsl_rx_ipacc_pdch(msg, "DEACT NACK", TS_EV_PDCH_DEACT_NACK);
|
|
break;
|
|
case RSL_MT_PHY_CONTEXT_CONF:
|
|
case RSL_MT_PREPROC_MEAS_RES:
|
|
case RSL_MT_TALKER_DET:
|
|
case RSL_MT_LISTENER_DET:
|
|
case RSL_MT_REMOTE_CODEC_CONF_REP:
|
|
case RSL_MT_MR_CODEC_MOD_ACK:
|
|
case RSL_MT_MR_CODEC_MOD_NACK:
|
|
case RSL_MT_MR_CODEC_MOD_PER:
|
|
LOG_LCHAN(msg->lchan, LOGL_NOTICE, "Unimplemented Abis RSL DChan msg 0x%02x\n",
|
|
rslh->c.msg_type);
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(sign_link->trx->bts->bts_ctrs, BTS_CTR_RSL_UNKNOWN));
|
|
break;
|
|
default:
|
|
LOG_LCHAN(msg->lchan, LOGL_NOTICE, "Unknown Abis RSL DChan msg 0x%02x\n",
|
|
rslh->c.msg_type);
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(sign_link->trx->bts->bts_ctrs, BTS_CTR_RSL_UNKNOWN));
|
|
return -EINVAL;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int rsl_rx_error_rep(struct msgb *msg)
|
|
{
|
|
struct abis_rsl_common_hdr *rslh = msgb_l2(msg);
|
|
struct tlv_parsed tp;
|
|
struct e1inp_sign_link *sign_link = msg->dst;
|
|
|
|
rsl_tlv_parse(&tp, rslh->data, msgb_l2len(msg)-sizeof(*rslh));
|
|
|
|
LOGP(DRSL, LOGL_ERROR, "%s ERROR REPORT%s\n",
|
|
gsm_trx_name(sign_link->trx), rsl_cause_name(&tp));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int abis_rsl_rx_trx(struct msgb *msg)
|
|
{
|
|
struct abis_rsl_common_hdr *rslh = msgb_l2(msg);
|
|
struct e1inp_sign_link *sign_link = msg->dst;
|
|
int rc = 0;
|
|
|
|
switch (rslh->msg_type) {
|
|
case RSL_MT_ERROR_REPORT:
|
|
rc = rsl_rx_error_rep(msg);
|
|
break;
|
|
case RSL_MT_RF_RES_IND:
|
|
/* interference on idle channels of TRX */
|
|
//DEBUGP(DRSL, "%s RF Resource Indication\n", gsm_trx_name(sign_link->trx));
|
|
break;
|
|
case RSL_MT_OVERLOAD:
|
|
/* indicate CCCH / ACCH / processor overload */
|
|
LOGP(DRSL, LOGL_ERROR, "%s CCCH/ACCH/CPU Overload\n",
|
|
gsm_trx_name(sign_link->trx));
|
|
break;
|
|
case 0x42: /* Nokia specific: SI End ACK */
|
|
LOGP(DRSL, LOGL_INFO, "Nokia SI End ACK\n");
|
|
break;
|
|
case 0x43: /* Nokia specific: SI End NACK */
|
|
LOGP(DRSL, LOGL_INFO, "Nokia SI End NACK\n");
|
|
break;
|
|
default:
|
|
LOGP(DRSL, LOGL_NOTICE, "%s Unknown Abis RSL TRX message "
|
|
"type 0x%02x\n", gsm_trx_name(sign_link->trx), rslh->msg_type);
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(sign_link->trx->bts->bts_ctrs, BTS_CTR_RSL_UNKNOWN));
|
|
return -EINVAL;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
/* Format an IMM ASS REJ according to 04.08 Chapter 9.1.20 */
|
|
static int rsl_send_imm_ass_rej(struct gsm_bts *bts,
|
|
struct gsm48_req_ref *rqd_ref,
|
|
uint8_t wait_ind)
|
|
{
|
|
uint8_t buf[GSM_MACBLOCK_LEN];
|
|
struct gsm48_imm_ass_rej *iar = (struct gsm48_imm_ass_rej *)buf;
|
|
|
|
/* create IMMEDIATE ASSIGN REJECT 04.08 message */
|
|
memset(iar, 0, sizeof(*iar));
|
|
iar->proto_discr = GSM48_PDISC_RR;
|
|
iar->msg_type = GSM48_MT_RR_IMM_ASS_REJ;
|
|
iar->page_mode = GSM48_PM_SAME;
|
|
|
|
/*
|
|
* Set all request references and wait indications to the same value.
|
|
* 3GPP TS 44.018 v4.5.0 release 4 (section 9.1.20.2) requires that
|
|
* we duplicate reference and wait indication to fill the message.
|
|
* The BTS will aggregate up to 4 of our ASS REJ messages if possible.
|
|
*/
|
|
memcpy(&iar->req_ref1, rqd_ref, sizeof(iar->req_ref1));
|
|
iar->wait_ind1 = wait_ind;
|
|
memcpy(&iar->req_ref2, rqd_ref, sizeof(iar->req_ref2));
|
|
iar->wait_ind2 = wait_ind;
|
|
memcpy(&iar->req_ref3, rqd_ref, sizeof(iar->req_ref3));
|
|
iar->wait_ind3 = wait_ind;
|
|
memcpy(&iar->req_ref4, rqd_ref, sizeof(iar->req_ref4));
|
|
iar->wait_ind4 = wait_ind;
|
|
|
|
/* we need to subtract 1 byte from sizeof(*iar) since ia includes the l2_plen field */
|
|
iar->l2_plen = GSM48_LEN2PLEN((sizeof(*iar)-1));
|
|
|
|
/* IAR Rest Octets:
|
|
* 0... .... = Extended RA: Not Present
|
|
* .0.. .... = Extended RA: Not Present
|
|
* ..0. .... = Extended RA: Not Present
|
|
* ...0 .... = Extended RA: Not Present
|
|
* .... L... = Additions in Rel-13: Not Present */
|
|
iar->rest[0] = GSM_MACBLOCK_PADDING & 0x0f;
|
|
|
|
return rsl_imm_assign_cmd(bts, sizeof(*iar) + 1, buf);
|
|
}
|
|
|
|
int rsl_tx_imm_ass_rej(struct gsm_bts *bts, struct gsm48_req_ref *rqd_ref)
|
|
{
|
|
uint8_t wait_ind;
|
|
wait_ind = bts->T3122;
|
|
if (!wait_ind)
|
|
wait_ind = osmo_tdef_get(bts->network->T_defs, 3122, OSMO_TDEF_S, -1);
|
|
if (!wait_ind)
|
|
wait_ind = GSM_T3122_DEFAULT;
|
|
/* The BTS will gather multiple CHAN RQD and reject up to 4 MS at the same time. */
|
|
return rsl_send_imm_ass_rej(bts, rqd_ref, wait_ind);
|
|
}
|
|
|
|
struct chan_rqd {
|
|
struct llist_head entry;
|
|
struct gsm_bts *bts;
|
|
struct gsm48_req_ref ref;
|
|
enum gsm_chreq_reason_t reason;
|
|
uint8_t ta;
|
|
/* set to true to mark that the release of the release_lchan is in progress */
|
|
struct gsm_lchan *release_lchan;
|
|
time_t timestamp;
|
|
};
|
|
|
|
/* Handle packet channel rach requests */
|
|
static int rsl_rx_pchan_rqd(struct chan_rqd *rqd)
|
|
{
|
|
uint8_t t1, t2, t3;
|
|
uint32_t fn;
|
|
uint8_t rqd_ta;
|
|
uint8_t is_11bit;
|
|
|
|
/* Process rach request and forward contained information to PCU */
|
|
if (rqd->ref.ra == 0x7F) {
|
|
is_11bit = 1;
|
|
|
|
/* FIXME: Also handle 11 bit rach requests */
|
|
LOGP(DRSL, LOGL_ERROR, "BTS %d eleven bit access burst not supported yet!\n",rqd->bts->nr);
|
|
return -EINVAL;
|
|
} else {
|
|
is_11bit = 0;
|
|
t1 = rqd->ref.t1;
|
|
t2 = rqd->ref.t2;
|
|
t3 = rqd->ref.t3_low | (rqd->ref.t3_high << 3);
|
|
fn = (51 * ((t3-t2) % 26) + t3 + 51 * 26 * t1);
|
|
rqd_ta = rqd->ta;
|
|
}
|
|
|
|
return pcu_tx_rach_ind(rqd->bts, rqd_ta, rqd->ref.ra, fn, is_11bit,
|
|
GSM_L1_BURST_TYPE_ACCESS_0);
|
|
}
|
|
|
|
/* Protect against RACH DoS attack: If an excessive amount of RACH requests queues up it is likely that the current BTS
|
|
* is under RACH DoS attack. To prevent excessive memory usage, remove all expired or at least one of the oldest channel
|
|
* requests from the queue to prevent the queue from growing indefinetly. */
|
|
static void reduce_rach_dos(struct gsm_bts *bts)
|
|
{
|
|
int rlt = gsm_bts_get_radio_link_timeout(bts);
|
|
time_t timestamp_current = time(NULL);
|
|
struct chan_rqd *rqd;
|
|
struct chan_rqd *rqd_tmp;
|
|
unsigned int rqd_count = 0;
|
|
|
|
/* Drop all expired channel requests in the list */
|
|
llist_for_each_entry_safe(rqd, rqd_tmp, &bts->chan_rqd_queue, entry) {
|
|
/* If the channel request is older than the radio link timeout we drop it. This also means that the
|
|
* queue is under its overflow limit again. */
|
|
if (timestamp_current - rqd->timestamp > rlt) {
|
|
LOG_BTS(bts, DRSL, LOGL_INFO, "CHAN RQD: tossing expired channel request"
|
|
"(ra=0x%02x, neci=0x%02x, chreq_reason=0x%02x)\n",
|
|
rqd->ref.ra, bts->network->neci, rqd->reason);
|
|
llist_del(&rqd->entry);
|
|
talloc_free(rqd);
|
|
} else {
|
|
rqd_count++;
|
|
}
|
|
}
|
|
|
|
/* If we find more than 255 (256) unexpired channel requests in the queue it is very likely that there is a
|
|
* problem with RACH dos on this BTS. We drop the first entry in the list to clip the growth of the list. */
|
|
if (rqd_count > 255) {
|
|
LOG_BTS(bts, DRSL, LOGL_INFO, "CHAN RQD: more than 255 queued RACH requests -- RACH DoS attack?\n");
|
|
rqd = llist_first_entry(&bts->chan_rqd_queue, struct chan_rqd, entry);
|
|
llist_del(&rqd->entry);
|
|
talloc_free(rqd);
|
|
}
|
|
}
|
|
|
|
/* Flush all channel requests pending on this BTS */
|
|
void abis_rsl_chan_rqd_queue_flush(struct gsm_bts *bts)
|
|
{
|
|
struct chan_rqd *rqd;
|
|
struct chan_rqd *rqd_tmp;
|
|
|
|
llist_for_each_entry_safe(rqd, rqd_tmp, &bts->chan_rqd_queue, entry) {
|
|
llist_del(&rqd->entry);
|
|
talloc_free(rqd);
|
|
}
|
|
}
|
|
|
|
/* MS has requested a channel on the RACH */
|
|
static int rsl_rx_chan_rqd(struct msgb *msg)
|
|
{
|
|
struct e1inp_sign_link *sign_link = msg->dst;
|
|
struct gsm_bts *bts = sign_link->trx->bts;
|
|
struct abis_rsl_dchan_hdr *rqd_hdr = msgb_l2(msg);
|
|
struct chan_rqd *rqd;
|
|
|
|
reduce_rach_dos(bts);
|
|
|
|
rqd = talloc_zero(bts, struct chan_rqd);
|
|
OSMO_ASSERT(rqd);
|
|
|
|
rqd->bts = bts;
|
|
rqd->timestamp = time(NULL);
|
|
|
|
/* parse request reference to be used in immediate assign */
|
|
if (rqd_hdr->data[0] != RSL_IE_REQ_REFERENCE) {
|
|
talloc_free(rqd);
|
|
return -EINVAL;
|
|
}
|
|
memcpy(&rqd->ref, &rqd_hdr->data[1], sizeof(rqd->ref));
|
|
|
|
/* parse access delay and use as TA */
|
|
if (rqd_hdr->data[sizeof(struct gsm48_req_ref)+1] != RSL_IE_ACCESS_DELAY) {
|
|
talloc_free(rqd);
|
|
return -EINVAL;
|
|
}
|
|
rqd->ta = rqd_hdr->data[sizeof(struct gsm48_req_ref)+2];
|
|
if (rqd->ta > bts->rach_max_delay) {
|
|
LOG_BTS(bts, DRSL, LOGL_INFO, "Ignoring CHAN RQD: Access Delay(%d) greater than %u\n",
|
|
rqd->ta, bts->rach_max_delay);
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts->bts_ctrs, BTS_CTR_CHREQ_MAX_DELAY_EXCEEDED));
|
|
talloc_free(rqd);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Determine channel request cause code */
|
|
rqd->reason = get_reason_by_chreq(rqd->ref.ra, bts->network->neci);
|
|
LOG_BTS(bts, DRSL, LOGL_INFO, "CHAN RQD: reason: %s (ra=0x%02x, neci=0x%02x, chreq_reason=0x%02x)\n",
|
|
get_value_string(gsm_chreq_descs, rqd->reason), rqd->ref.ra, bts->network->neci, rqd->reason);
|
|
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts->bts_ctrs, BTS_CTR_CHREQ_TOTAL));
|
|
switch (rqd->reason) {
|
|
case GSM_CHREQ_REASON_EMERG:
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts->bts_ctrs, BTS_CTR_CHREQ_ATTEMPTED_EMERG));
|
|
break;
|
|
case GSM_CHREQ_REASON_CALL:
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts->bts_ctrs, BTS_CTR_CHREQ_ATTEMPTED_CALL));
|
|
break;
|
|
case GSM_CHREQ_REASON_LOCATION_UPD:
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts->bts_ctrs, BTS_CTR_CHREQ_ATTEMPTED_LOCATION_UPD));
|
|
break;
|
|
case GSM_CHREQ_REASON_PAG:
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts->bts_ctrs, BTS_CTR_CHREQ_ATTEMPTED_PAG));
|
|
break;
|
|
case GSM_CHREQ_REASON_PDCH:
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts->bts_ctrs, BTS_CTR_CHREQ_ATTEMPTED_PDCH));
|
|
break;
|
|
case GSM_CHREQ_REASON_OTHER:
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts->bts_ctrs, BTS_CTR_CHREQ_ATTEMPTED_OTHER));
|
|
break;
|
|
default:
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts->bts_ctrs, BTS_CTR_CHREQ_ATTEMPTED_UNKNOWN));
|
|
break;
|
|
}
|
|
|
|
/* Block emergency calls if we explicitly disable them via sysinfo. */
|
|
if (rqd->reason == GSM_CHREQ_REASON_EMERG) {
|
|
if (bts->si_common.rach_control.t2 & 0x4) {
|
|
LOG_BTS(bts, DRSL, LOGL_NOTICE, "CHAN RQD: MS attempts EMERGENCY CALL although EMERGENCY CALLS "
|
|
"are not allowed in sysinfo (spec violation by MS!)\n");
|
|
rsl_tx_imm_ass_rej(bts, &rqd->ref);
|
|
talloc_free(rqd);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Enqueue request */
|
|
llist_add_tail(&rqd->entry, &bts->chan_rqd_queue);
|
|
|
|
/* Forward the request directly. Most request will be finished with one attempt so no queuing will be
|
|
* necessary. */
|
|
abis_rsl_chan_rqd_queue_poll(bts);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Find any busy TCH/H or TCH/F lchan */
|
|
static struct gsm_lchan *get_any_lchan(struct gsm_bts *bts)
|
|
{
|
|
int trx_nr;
|
|
int ts_nr;
|
|
struct gsm_bts_trx *trx;
|
|
struct gsm_bts_trx_ts *ts;
|
|
struct gsm_lchan *lchan_est = NULL;
|
|
struct gsm_lchan *lchan_any = NULL;
|
|
struct gsm_lchan *lchan;
|
|
|
|
for (trx_nr = 0; trx_nr < bts->num_trx; trx_nr++) {
|
|
trx = gsm_bts_trx_num(bts, trx_nr);
|
|
for (ts_nr = 0; ts_nr < TRX_NR_TS; ts_nr++) {
|
|
ts = &trx->ts[ts_nr];
|
|
ts_for_n_lchans(lchan, ts, ts->max_primary_lchans) {
|
|
if (lchan->type == GSM_LCHAN_TCH_F || lchan->type == GSM_LCHAN_TCH_H) {
|
|
if (lchan->fi->state == LCHAN_ST_ESTABLISHED) {
|
|
if (!lchan_est || bts->chan_alloc_reverse)
|
|
lchan_est = lchan;
|
|
} else {
|
|
if (!lchan_any || bts->chan_alloc_reverse)
|
|
lchan_any = lchan;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (lchan_est)
|
|
return lchan_est;
|
|
else if (lchan_any)
|
|
return lchan_any;
|
|
return NULL;
|
|
}
|
|
|
|
/* Ensure that an incoming emergency call gets priority, if all voice channels are busy, terminate one regular call.
|
|
* Return true if freeing of a busy lchan is in progress, but not done yet, return false when done (either successfully
|
|
* or unsuccessfully). */
|
|
static bool force_free_lchan_for_emergency(struct chan_rqd *rqd)
|
|
{
|
|
/* If the request is not about an emergency call, we may exit early, without doing anything. */
|
|
if (rqd->reason != GSM_CHREQ_REASON_EMERG)
|
|
return false;
|
|
|
|
/* First check the situation on the BTS, if we have TCH/H or TCH/F resources available for another (EMERGENCY)
|
|
* call. If yes, then no (further) action has to be carried out. */
|
|
if (lchan_avail_by_type(rqd->bts, GSM_LCHAN_TCH_F, true)) {
|
|
LOG_BTS(rqd->bts, DRSL, LOGL_NOTICE,
|
|
"CHAN RQD/EMERGENCY-PRIORITY: at least one TCH/F is (now) available!\n");
|
|
return false;
|
|
}
|
|
if (lchan_avail_by_type(rqd->bts, GSM_LCHAN_TCH_H, true)) {
|
|
LOG_BTS(rqd->bts, DRSL, LOGL_NOTICE,
|
|
"CHAN RQD/EMERGENCY-PRIORITY: at least one TCH/H is (now) available!\n");
|
|
return false;
|
|
}
|
|
|
|
/* No free TCH/F or TCH/H was found, we now select one of the busy lchans and initate a release on that lchan.
|
|
* This will take a short amount of time. We need to come back and check regulary to see if we managed to
|
|
* free up another lchan. */
|
|
if (!rqd->release_lchan) {
|
|
struct gsm_lchan *release_lchan;
|
|
/* Pick any busy TCH/F or TCH/H lchan and inititate a channel
|
|
* release to make room for the incoming emergency call */
|
|
rqd->release_lchan = release_lchan = get_any_lchan(rqd->bts);
|
|
if (!release_lchan) {
|
|
/* It can not happen that we first find out that there
|
|
* is no TCH/H or TCH/F available and at the same time
|
|
* we ware unable to find any busy TCH/H or TCH/F. In
|
|
* this case, the BTS probably does not have any
|
|
* voice channels configured? */
|
|
LOG_BTS(rqd->bts, DRSL, LOGL_NOTICE,
|
|
"CHAN RQD/EMERGENCY-PRIORITY: no TCH/H or TCH/F available - check VTY config!\n");
|
|
return false;
|
|
}
|
|
|
|
LOG_BTS(rqd->bts, DRSL, LOGL_NOTICE,
|
|
"CHAN RQD/EMERGENCY-PRIORITY: inducing termination of lchan %s (state:%s) in favor of incoming EMERGENCY CALL!\n",
|
|
gsm_lchan_name(release_lchan), osmo_fsm_inst_state_name(release_lchan->fi));
|
|
|
|
lchan_release(release_lchan, !!(release_lchan->conn), true, 0,
|
|
gscon_last_eutran_plmn(release_lchan->conn));
|
|
|
|
/* Also release any overlapping VAMOS multiplexes on this lchan */
|
|
release_lchan = gsm_lchan_primary_to_vamos(release_lchan);
|
|
if (release_lchan)
|
|
lchan_release(release_lchan, !!(release_lchan->conn), true, 0,
|
|
gscon_last_eutran_plmn(release_lchan->conn));
|
|
} else {
|
|
/* BTS is shutting down, give up... */
|
|
if (rqd->release_lchan->ts->fi->state == TS_ST_NOT_INITIALIZED)
|
|
return false;
|
|
|
|
OSMO_ASSERT(rqd->release_lchan->fi);
|
|
|
|
LOG_BTS(rqd->bts, DRSL, LOGL_NOTICE,
|
|
"CHAN RQD/EMERGENCY-PRIORITY: still terminating lchan %s (state:%s) in favor of incoming EMERGENCY CALL!\n",
|
|
gsm_lchan_name(rqd->release_lchan), osmo_fsm_inst_state_name(rqd->release_lchan->fi));
|
|
|
|
/* If the channel was released in error (not established), the
|
|
* lchan FSM automatically blocks the LCHAN for a short time.
|
|
* This is not acceptable in an emergency situation, so we skip
|
|
* this waiting period. */
|
|
if (rqd->release_lchan->fi->state == LCHAN_ST_WAIT_AFTER_ERROR)
|
|
lchan_fsm_skip_error(rqd->release_lchan);
|
|
}
|
|
|
|
/* We are still in the process of releasing a busy lchan in favvor of the incoming emergency call. */
|
|
return true;
|
|
}
|
|
|
|
void abis_rsl_chan_rqd_queue_poll(struct gsm_bts *bts)
|
|
{
|
|
struct lchan_activate_info info;
|
|
enum gsm_chan_t lctype;
|
|
struct gsm_lchan *lchan = NULL;
|
|
struct chan_rqd *rqd;
|
|
|
|
rqd = llist_first_entry_or_null(&bts->chan_rqd_queue, struct chan_rqd, entry);
|
|
if (!rqd)
|
|
return;
|
|
|
|
/* Handle PDCH related rach requests (in case of BSC-co-located-PCU) */
|
|
if (rqd->reason == GSM_CHREQ_REASON_PDCH) {
|
|
rsl_rx_pchan_rqd(rqd);
|
|
return;
|
|
}
|
|
|
|
/* Ensure that emergency calls will get priority over regular calls, however releasing
|
|
* lchan in favor of an emergency call may take some time, so we exit here. The lchan_fsm
|
|
* will poll again when an lchan becomes available. */
|
|
if (force_free_lchan_for_emergency(rqd))
|
|
return;
|
|
|
|
/* determine channel type (SDCCH/TCH_F/TCH_H) based on
|
|
* request reference RA */
|
|
lctype = get_ctype_by_chreq(bts->network, rqd->ref.ra);
|
|
|
|
/* check availability / allocate channel
|
|
*
|
|
* - First check for EMERGENCY call attempts,
|
|
* - then try to allocate SDCCH.
|
|
* - If SDCCH is not available, try a TCH/H (less bandwidth).
|
|
* - If there is still no channel available, try a TCH/F.
|
|
*
|
|
*/
|
|
|
|
/* Emergency calls will be put on a free TCH/H or TCH/F directly in the code below, all other channel requests
|
|
* will get an SDCCH first (if possible). */
|
|
if (rqd->reason != GSM_CHREQ_REASON_EMERG)
|
|
lchan = lchan_select_by_type(bts, GSM_LCHAN_SDCCH);
|
|
|
|
if (!lchan) {
|
|
LOG_BTS(bts, DRSL, LOGL_NOTICE, "CHAN RQD: no resources for %s 0x%x, retrying with %s\n",
|
|
gsm_lchant_name(GSM_LCHAN_SDCCH), rqd->ref.ra, gsm_lchant_name(GSM_LCHAN_TCH_H));
|
|
lchan = lchan_select_by_type(bts, GSM_LCHAN_TCH_H);
|
|
}
|
|
if (!lchan) {
|
|
LOG_BTS(bts, DRSL, LOGL_NOTICE, "CHAN RQD: no resources for %s 0x%x, retrying with %s\n",
|
|
gsm_lchant_name(GSM_LCHAN_SDCCH), rqd->ref.ra, gsm_lchant_name(GSM_LCHAN_TCH_F));
|
|
lchan = lchan_select_by_type(bts, GSM_LCHAN_TCH_F);
|
|
}
|
|
if (!lchan) {
|
|
LOG_BTS(bts, DRSL, LOGL_NOTICE, "CHAN RQD: no resources for %s 0x%x\n",
|
|
gsm_lchant_name(lctype), rqd->ref.ra);
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts->bts_ctrs, BTS_CTR_CHREQ_NO_CHANNEL));
|
|
rsl_tx_imm_ass_rej(bts, &rqd->ref);
|
|
llist_del(&rqd->entry);
|
|
talloc_free(rqd);
|
|
return;
|
|
}
|
|
|
|
/* save the RACH data as we need it after the CHAN ACT ACK */
|
|
lchan->rqd_ref = talloc_zero(bts, struct gsm48_req_ref);
|
|
OSMO_ASSERT(lchan->rqd_ref);
|
|
|
|
*(lchan->rqd_ref) = rqd->ref;
|
|
|
|
LOG_LCHAN(lchan, LOGL_DEBUG, "MS: Channel Request: reason=%s ra=0x%02x ta=%d\n",
|
|
gsm_chreq_name(rqd->reason), rqd->ref.ra, rqd->ta);
|
|
info = (struct lchan_activate_info){
|
|
.activ_for = ACTIVATE_FOR_MS_CHANNEL_REQUEST,
|
|
.ch_mode_rate = {
|
|
.chan_mode = GSM48_CMODE_SIGN,
|
|
.chan_rate = CH_RATE_SDCCH,
|
|
},
|
|
.ta = rqd->ta,
|
|
.ta_known = true,
|
|
.tsc_set = -1,
|
|
.tsc = -1,
|
|
};
|
|
|
|
lchan_activate(lchan, &info);
|
|
llist_del(&rqd->entry);
|
|
talloc_free(rqd);
|
|
return;
|
|
}
|
|
|
|
int rsl_tx_imm_assignment(struct gsm_lchan *lchan)
|
|
{
|
|
int rc;
|
|
struct gsm_bts *bts = lchan->ts->trx->bts;
|
|
uint8_t buf[GSM_MACBLOCK_LEN];
|
|
struct gsm48_imm_ass *ia = (struct gsm48_imm_ass *) buf;
|
|
|
|
/* create IMMEDIATE ASSIGN 04.08 message */
|
|
memset(ia, 0, sizeof(*ia));
|
|
/* we set ia->l2_plen once we know the length of the MA below */
|
|
ia->proto_discr = GSM48_PDISC_RR;
|
|
ia->msg_type = GSM48_MT_RR_IMM_ASS;
|
|
ia->page_mode = GSM48_PM_SAME;
|
|
rc = gsm48_lchan2chan_desc(&ia->chan_desc, lchan, lchan->tsc, true);
|
|
if (rc) {
|
|
LOG_LCHAN(lchan, LOGL_ERROR, "Error encoding Channel Number\n");
|
|
return rc;
|
|
}
|
|
|
|
/* use request reference extracted from CHAN_RQD */
|
|
memcpy(&ia->req_ref, lchan->rqd_ref, sizeof(ia->req_ref));
|
|
ia->timing_advance = lchan->last_ta;
|
|
if (!lchan->ts->hopping.enabled) {
|
|
ia->mob_alloc_len = 0;
|
|
} else {
|
|
ia->mob_alloc_len = lchan->ts->hopping.ma_len;
|
|
memcpy(ia->mob_alloc, lchan->ts->hopping.ma_data, ia->mob_alloc_len);
|
|
}
|
|
/* we need to subtract 1 byte from sizeof(*ia) since ia includes the l2_plen field */
|
|
ia->l2_plen = GSM48_LEN2PLEN((sizeof(*ia)-1) + ia->mob_alloc_len);
|
|
|
|
/* send IMMEDIATE ASSIGN CMD on RSL to BTS (to send on CCCH to MS) */
|
|
rc = rsl_imm_assign_cmd(bts, sizeof(*ia)+ia->mob_alloc_len, (uint8_t *) ia);
|
|
|
|
if (!rc)
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts->bts_ctrs, BTS_CTR_CHREQ_SUCCESSFUL));
|
|
|
|
return rc;
|
|
}
|
|
|
|
/* current load on the CCCH */
|
|
static int rsl_rx_ccch_load(struct msgb *msg)
|
|
{
|
|
struct e1inp_sign_link *sign_link = msg->dst;
|
|
struct abis_rsl_dchan_hdr *rslh = msgb_l2(msg);
|
|
struct ccch_signal_data sd;
|
|
|
|
sd.bts = sign_link->trx->bts;
|
|
sd.rach_slot_count = -1;
|
|
sd.rach_busy_count = -1;
|
|
sd.rach_access_count = -1;
|
|
|
|
switch (rslh->data[0]) {
|
|
case RSL_IE_PAGING_LOAD:
|
|
sd.pg_buf_space = rslh->data[1] << 8 | rslh->data[2];
|
|
if (is_ipaccess_bts(sign_link->trx->bts) && sd.pg_buf_space == 0xffff) {
|
|
/* paging load below configured threshold, use 50 as default */
|
|
sd.pg_buf_space = 50;
|
|
}
|
|
paging_update_buffer_space(sign_link->trx->bts, sd.pg_buf_space);
|
|
osmo_signal_dispatch(SS_CCCH, S_CCCH_PAGING_LOAD, &sd);
|
|
break;
|
|
case RSL_IE_RACH_LOAD:
|
|
if (msgb_length(msg) >= 7) {
|
|
int32_t busy_percent, access_percent;
|
|
/* build data for signal */
|
|
sd.rach_slot_count = rslh->data[2] << 8 | rslh->data[3];
|
|
sd.rach_busy_count = rslh->data[4] << 8 | rslh->data[5];
|
|
sd.rach_access_count = rslh->data[6] << 8 | rslh->data[7];
|
|
/* update stats group */
|
|
if (sd.rach_slot_count) {
|
|
access_percent = (int32_t) sd.rach_access_count * 100 / (int32_t) sd.rach_slot_count;
|
|
busy_percent = (int32_t) sd.rach_busy_count * 100 / (int32_t) sd.rach_slot_count;
|
|
} else {
|
|
access_percent = 0;
|
|
busy_percent = 100;
|
|
}
|
|
|
|
osmo_stat_item_set(osmo_stat_item_group_get_item(sd.bts->bts_statg, BTS_STAT_RACH_BUSY), busy_percent);
|
|
osmo_stat_item_set(osmo_stat_item_group_get_item(sd.bts->bts_statg, BTS_STAT_RACH_ACCESS), access_percent);
|
|
/* dispatch signal */
|
|
osmo_signal_dispatch(SS_CCCH, S_CCCH_RACH_LOAD, &sd);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* 8.5.9 current load on the CBCH (Cell Broadcast) */
|
|
static int rsl_rx_cbch_load(struct msgb *msg)
|
|
{
|
|
struct e1inp_sign_link *sign_link = msg->dst;
|
|
struct abis_rsl_dchan_hdr *rslh = msgb_l2(msg);
|
|
struct gsm_bts *bts = sign_link->trx->bts;
|
|
bool cbch_extended = false;
|
|
bool is_overflow = false;
|
|
int8_t load_info;
|
|
struct tlv_parsed tp;
|
|
uint8_t slot_count;
|
|
|
|
rsl_tlv_parse(&tp, rslh->data, msgb_l2len(msg) - sizeof(*rslh));
|
|
if (!TLVP_PRESENT(&tp, RSL_IE_CBCH_LOAD_INFO)) {
|
|
LOG_BTS(bts, DRSL, LOGL_ERROR, "CBCH LOAD IND without mandatory CBCH Load Info IE\n");
|
|
return -1;
|
|
}
|
|
/* 9.4.43 */
|
|
load_info = *TLVP_VAL(&tp, RSL_IE_CBCH_LOAD_INFO);
|
|
if (load_info & 0x80)
|
|
is_overflow = true;
|
|
slot_count = load_info & 0x0F;
|
|
|
|
if (TLVP_PRES_LEN(&tp, RSL_IE_SMSCB_CHAN_INDICATOR, 1) &&
|
|
(*TLVP_VAL(&tp, RSL_IE_SMSCB_CHAN_INDICATOR) & 0x0F) == 0x01)
|
|
cbch_extended = true;
|
|
|
|
return bts_smscb_rx_cbch_load_ind(bts, cbch_extended, is_overflow, slot_count);
|
|
}
|
|
|
|
/* Ericsson specific: Immediate Assign Sent */
|
|
static int rsl_rx_ericsson_imm_assign_sent(struct msgb *msg)
|
|
{
|
|
struct e1inp_sign_link *sign_link = msg->dst;
|
|
struct abis_rsl_dchan_hdr *dh = msgb_l2(msg);
|
|
uint32_t tlli;
|
|
|
|
LOGP(DRSL, LOGL_INFO, "IMM.ass sent\n");
|
|
msgb_pull(msg, sizeof(*dh));
|
|
|
|
/* FIXME: Move to TLV once we support defining TV types with V having len != 1 byte */
|
|
if(msg->len < 5)
|
|
LOGP(DRSL, LOGL_ERROR, "short IMM.ass sent message!\n");
|
|
else if(msg->data[0] != RSL_IE_ERIC_MOBILE_ID)
|
|
LOGP(DRSL, LOGL_ERROR, "unsupported IMM.ass message format! (please fix)\n");
|
|
else {
|
|
msgb_pull(msg, 1); /* drop previous data to use msg_pull_u32 */
|
|
tlli = msgb_pull_u32(msg);
|
|
pcu_tx_imm_ass_sent(sign_link->trx->bts, tlli);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int abis_rsl_rx_cchan(struct msgb *msg)
|
|
{
|
|
struct e1inp_sign_link *sign_link = msg->dst;
|
|
struct abis_rsl_dchan_hdr *rslh = msgb_l2(msg);
|
|
struct rate_ctr_group *bts_ctrs = sign_link->trx->bts->bts_ctrs;
|
|
int rc = 0;
|
|
|
|
msg->lchan = lchan_lookup(sign_link->trx, rslh->chan_nr,
|
|
"Abis RSL rx CCHAN: ");
|
|
|
|
switch (rslh->c.msg_type) {
|
|
case RSL_MT_CHAN_RQD:
|
|
/* MS has requested a channel on the RACH */
|
|
rc = rsl_rx_chan_rqd(msg);
|
|
break;
|
|
case RSL_MT_CCCH_LOAD_IND:
|
|
/* current load on the CCCH */
|
|
rc = rsl_rx_ccch_load(msg);
|
|
break;
|
|
case RSL_MT_DELETE_IND:
|
|
/* CCCH overloaded, IMM_ASSIGN was dropped */
|
|
LOGPLCHAN(msg->lchan, DRSL, LOGL_NOTICE, "DELETE INDICATION (Downlink CCCH overload)\n");
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts_ctrs, BTS_CTR_RSL_DELETE_IND));
|
|
break;
|
|
case RSL_MT_CBCH_LOAD_IND:
|
|
/* current load on the CBCH */
|
|
rc = rsl_rx_cbch_load(msg);
|
|
break;
|
|
case RSL_MT_ERICSSON_IMM_ASS_SENT:
|
|
rc = rsl_rx_ericsson_imm_assign_sent(msg);
|
|
break;
|
|
default:
|
|
LOGP(DRSL, LOGL_NOTICE, "Unknown Abis RSL TRX message type "
|
|
"0x%02x\n", rslh->c.msg_type);
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(bts_ctrs, BTS_CTR_RSL_UNKNOWN));
|
|
return -EINVAL;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int rsl_rx_rll_err_ind(struct msgb *msg)
|
|
{
|
|
struct tlv_parsed tp;
|
|
struct abis_rsl_rll_hdr *rllh = msgb_l2(msg);
|
|
uint8_t rlm_cause;
|
|
|
|
rsl_tlv_parse(&tp, rllh->data, msgb_l2len(msg) - sizeof(*rllh));
|
|
if (!TLVP_PRESENT(&tp, RSL_IE_RLM_CAUSE)) {
|
|
LOG_LCHAN(msg->lchan, LOGL_ERROR, "ERROR INDICATION without mandantory cause.\n");
|
|
return -1;
|
|
}
|
|
|
|
rlm_cause = *TLVP_VAL(&tp, RSL_IE_RLM_CAUSE);
|
|
LOG_LCHAN(msg->lchan, LOGL_ERROR, "ERROR INDICATION cause=%s\n", rsl_rlm_cause_name(rlm_cause));
|
|
|
|
rll_indication(msg->lchan, rllh->link_id, BSC_RLLR_IND_ERR_IND);
|
|
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(msg->lchan->ts->trx->bts->bts_ctrs, BTS_CTR_CHAN_RLL_ERR));
|
|
|
|
osmo_fsm_inst_dispatch(msg->lchan->fi, LCHAN_EV_RLL_ERR_IND, &rlm_cause);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* ESTABLISH INDICATION, LOCATION AREA UPDATE REQUEST
|
|
0x02, 0x06,
|
|
0x01, 0x20,
|
|
0x02, 0x00,
|
|
0x0b, 0x00, 0x0f, 0x05, 0x08, ... */
|
|
|
|
static int abis_rsl_rx_rll(struct msgb *msg)
|
|
{
|
|
struct e1inp_sign_link *sign_link = msg->dst;
|
|
struct abis_rsl_rll_hdr *rllh = msgb_l2(msg);
|
|
int rc = 0;
|
|
uint8_t sapi = rllh->link_id & 0x7;
|
|
|
|
msg->lchan = lchan_lookup(sign_link->trx, rllh->chan_nr, "Abis RSL rx RLL: ");
|
|
|
|
switch (rllh->c.msg_type) {
|
|
case RSL_MT_DATA_IND:
|
|
LOG_LCHAN(msg->lchan, LOGL_DEBUG, "SAPI=%u DATA INDICATION\n", sapi);
|
|
if (msgb_l2len(msg) >
|
|
sizeof(struct abis_rsl_common_hdr) + sizeof(*rllh) &&
|
|
rllh->data[0] == RSL_IE_L3_INFO) {
|
|
msg->l3h = &rllh->data[3];
|
|
return gsm0408_rcvmsg(msg, rllh->link_id);
|
|
}
|
|
break;
|
|
case RSL_MT_EST_IND:
|
|
LOG_LCHAN(msg->lchan, LOGL_DEBUG, "SAPI=%u ESTABLISH INDICATION\n", sapi);
|
|
/* lchan is established, stop T3101 */
|
|
|
|
/* Note: By definition the first Establish Indication must
|
|
* happen first on SAPI 0, once the connection on SAPI 0 is
|
|
* made, parallel connections on other SAPIs are permitted */
|
|
if (sapi != 0 && msg->lchan->sapis[0] != LCHAN_SAPI_MS) {
|
|
LOG_LCHAN(msg->lchan, LOGL_NOTICE,
|
|
"MS attempted to establish DCCH on SAPI=%d (expected SAPI=0)\n",
|
|
sapi);
|
|
/* Note: We do not need to close the channel,
|
|
* since we might still get a proper Establish Ind.
|
|
* If not, T3101 will close the channel on timeout. */
|
|
break;
|
|
}
|
|
|
|
/* Note: Check for MF SACCH on SAPI=0 (not permitted). By
|
|
* definition we establish a link in multiframe (MF) mode.
|
|
* (see also 3GPP TS 48.058, chapter 3.1. However, on SAPI=0
|
|
* SACCH is only allowed in UL mode, not in MF mode.
|
|
* (see also 3GPP TS 44.005, figure 5) So we have to drop such
|
|
* Establish Indications */
|
|
if (sapi == 0 && (rllh->link_id >> 6 & 0x03) == 1) {
|
|
LOG_LCHAN(msg->lchan, LOGL_NOTICE,
|
|
"MS attempted to establish an SACCH in MF mode on SAPI=0 (not permitted)\n");
|
|
|
|
/* Note: We do not need to close the channel,
|
|
* since we might still get a proper Establish Ind.
|
|
* If not, T3101 will close the channel on timeout. */
|
|
break;
|
|
}
|
|
|
|
msg->lchan->sapis[sapi] = LCHAN_SAPI_MS;
|
|
osmo_fsm_inst_dispatch(msg->lchan->fi, LCHAN_EV_RLL_ESTABLISH_IND, msg);
|
|
|
|
if (msgb_l2len(msg) >
|
|
sizeof(struct abis_rsl_common_hdr) + sizeof(*rllh) &&
|
|
rllh->data[0] == RSL_IE_L3_INFO) {
|
|
msg->l3h = &rllh->data[3];
|
|
return gsm0408_rcvmsg(msg, rllh->link_id);
|
|
}
|
|
break;
|
|
case RSL_MT_EST_CONF:
|
|
LOG_LCHAN(msg->lchan, LOGL_DEBUG, "SAPI=%u ESTABLISH CONFIRM\n", sapi);
|
|
msg->lchan->sapis[sapi] = LCHAN_SAPI_NET;
|
|
rll_indication(msg->lchan, rllh->link_id,
|
|
BSC_RLLR_IND_EST_CONF);
|
|
break;
|
|
case RSL_MT_REL_IND:
|
|
/* BTS informs us of having received DISC from MS */
|
|
osmo_fsm_inst_dispatch(msg->lchan->fi, LCHAN_EV_RLL_REL_IND, &rllh->link_id);
|
|
break;
|
|
case RSL_MT_REL_CONF:
|
|
/* BTS informs us of having received UA from MS,
|
|
* in response to DISC that we've sent earlier */
|
|
osmo_fsm_inst_dispatch(msg->lchan->fi, LCHAN_EV_RLL_REL_CONF, &rllh->link_id);
|
|
break;
|
|
case RSL_MT_ERROR_IND:
|
|
LOG_LCHAN(msg->lchan, LOGL_DEBUG, "SAPI=%u ERROR INDICATION\n", sapi);
|
|
rc = rsl_rx_rll_err_ind(msg);
|
|
break;
|
|
case RSL_MT_UNIT_DATA_IND:
|
|
LOG_LCHAN(msg->lchan, LOGL_NOTICE, "SAPI=%u UNIT DATA INDICATION:"
|
|
" unimplemented Abis RLL message type 0x%02x\n", sapi, rllh->c.msg_type);
|
|
break;
|
|
default:
|
|
LOG_LCHAN(msg->lchan, LOGL_NOTICE, "SAPI=%u Unknown Abis RLL message type 0x%02x\n",
|
|
sapi, rllh->c.msg_type);
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(sign_link->trx->bts->bts_ctrs, BTS_CTR_RSL_UNKNOWN));
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
/* Return an ip.access BTS speech mode value (uint8_t) or negative on error. */
|
|
int ipacc_speech_mode(enum gsm48_chan_mode tch_mode, enum gsm_chan_t type)
|
|
{
|
|
switch (gsm48_chan_mode_to_non_vamos(tch_mode)) {
|
|
case GSM48_CMODE_SPEECH_V1:
|
|
switch (type) {
|
|
case GSM_LCHAN_TCH_F:
|
|
return 0x00;
|
|
case GSM_LCHAN_TCH_H:
|
|
return 0x03;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case GSM48_CMODE_SPEECH_EFR:
|
|
switch (type) {
|
|
case GSM_LCHAN_TCH_F:
|
|
return 0x01;
|
|
/* there's no half-rate EFR */
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case GSM48_CMODE_SPEECH_AMR:
|
|
switch (type) {
|
|
case GSM_LCHAN_TCH_F:
|
|
return 0x02;
|
|
case GSM_LCHAN_TCH_H:
|
|
return 0x05;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
void ipacc_speech_mode_set_direction(uint8_t *speech_mode, bool send)
|
|
{
|
|
const uint8_t recv_only_flag = 0x10;
|
|
if (send)
|
|
*speech_mode = *speech_mode & ~recv_only_flag;
|
|
else
|
|
*speech_mode = *speech_mode | recv_only_flag;
|
|
}
|
|
|
|
/* Return an ip.access BTS payload type value (uint8_t) or negative on error. */
|
|
int ipacc_payload_type(enum gsm48_chan_mode tch_mode, enum gsm_chan_t type)
|
|
{
|
|
switch (gsm48_chan_mode_to_non_vamos(tch_mode)) {
|
|
case GSM48_CMODE_SPEECH_V1:
|
|
switch (type) {
|
|
case GSM_LCHAN_TCH_F:
|
|
return RTP_PT_GSM_FULL;
|
|
case GSM_LCHAN_TCH_H:
|
|
return RTP_PT_GSM_HALF;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case GSM48_CMODE_SPEECH_EFR:
|
|
switch (type) {
|
|
case GSM_LCHAN_TCH_F:
|
|
return RTP_PT_GSM_EFR;
|
|
/* there's no half-rate EFR */
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case GSM48_CMODE_SPEECH_AMR:
|
|
switch (type) {
|
|
case GSM_LCHAN_TCH_F:
|
|
case GSM_LCHAN_TCH_H:
|
|
return RTP_PT_AMR;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
const char *ip_to_a(uint32_t ip)
|
|
{
|
|
struct in_addr ia;
|
|
ia.s_addr = htonl(ip);
|
|
return inet_ntoa(ia);
|
|
}
|
|
|
|
/* ip.access specific RSL extensions */
|
|
static void ipac_parse_rtp(struct gsm_lchan *lchan, struct tlv_parsed *tv, const char *label)
|
|
{
|
|
struct in_addr ip;
|
|
uint16_t port, conn_id;
|
|
|
|
if (TLVP_PRESENT(tv, RSL_IE_IPAC_LOCAL_IP)) {
|
|
ip.s_addr = tlvp_val32_unal(tv, RSL_IE_IPAC_LOCAL_IP);
|
|
lchan->abis_ip.bound_ip = ntohl(ip.s_addr);
|
|
}
|
|
|
|
if (TLVP_PRESENT(tv, RSL_IE_IPAC_LOCAL_PORT)) {
|
|
port = tlvp_val16_unal(tv, RSL_IE_IPAC_LOCAL_PORT);
|
|
port = ntohs(port);
|
|
lchan->abis_ip.bound_port = port;
|
|
}
|
|
|
|
if (TLVP_PRESENT(tv, RSL_IE_IPAC_CONN_ID)) {
|
|
conn_id = tlvp_val16_unal(tv, RSL_IE_IPAC_CONN_ID);
|
|
conn_id = ntohs(conn_id);
|
|
lchan->abis_ip.conn_id = conn_id;
|
|
}
|
|
|
|
if (TLVP_PRESENT(tv, RSL_IE_IPAC_RTP_PAYLOAD2)) {
|
|
lchan->abis_ip.rtp_payload2 =
|
|
*TLVP_VAL(tv, RSL_IE_IPAC_RTP_PAYLOAD2);
|
|
}
|
|
|
|
if (TLVP_PRESENT(tv, RSL_IE_IPAC_SPEECH_MODE)) {
|
|
lchan->abis_ip.speech_mode =
|
|
*TLVP_VAL(tv, RSL_IE_IPAC_SPEECH_MODE);
|
|
}
|
|
|
|
/* Why would we receive the MGW IP and port back from the BTS, and why would we care?? */
|
|
if (TLVP_PRESENT(tv, RSL_IE_IPAC_REMOTE_IP)) {
|
|
ip.s_addr = tlvp_val32_unal(tv, RSL_IE_IPAC_REMOTE_IP);
|
|
lchan->abis_ip.connect_ip = ntohl(ip.s_addr);
|
|
}
|
|
if (TLVP_PRESENT(tv, RSL_IE_IPAC_REMOTE_PORT)) {
|
|
port = tlvp_val16_unal(tv, RSL_IE_IPAC_REMOTE_PORT);
|
|
port = ntohs(port);
|
|
lchan->abis_ip.connect_port = port;
|
|
}
|
|
|
|
LOG_LCHAN(lchan, LOGL_DEBUG, "Rx IPACC %s ACK:"
|
|
" BTS=%s:%u conn_id=%u rtp_payload2=0x%02x speech_mode=0x%02x\n",
|
|
label, ip_to_a(lchan->abis_ip.bound_ip), lchan->abis_ip.bound_port,
|
|
lchan->abis_ip.conn_id, lchan->abis_ip.rtp_payload2, lchan->abis_ip.speech_mode);
|
|
}
|
|
|
|
/*! Send Issue IPA RSL CRCX to configure the RTP port of the BTS.
|
|
* \param[in] lchan Logical Channel for which we issue CRCX
|
|
*/
|
|
int rsl_tx_ipacc_crcx(const struct gsm_lchan *lchan)
|
|
{
|
|
struct msgb *msg;
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
|
|
int chan_nr = gsm_lchan2chan_nr(lchan, true);
|
|
if (chan_nr < 0)
|
|
return chan_nr;
|
|
|
|
msg = rsl_msgb_alloc();
|
|
|
|
dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
|
|
init_dchan_hdr(dh, RSL_MT_IPAC_CRCX);
|
|
dh->c.msg_discr = ABIS_RSL_MDISC_IPACCESS;
|
|
dh->chan_nr = chan_nr;
|
|
|
|
/* 0x1- == receive-only, 0x-1 == EFR codec */
|
|
msgb_tv_put(msg, RSL_IE_IPAC_SPEECH_MODE, lchan->abis_ip.speech_mode);
|
|
msgb_tv_put(msg, RSL_IE_IPAC_RTP_PAYLOAD, lchan->abis_ip.rtp_payload);
|
|
|
|
LOG_LCHAN(lchan, LOGL_DEBUG, "Sending IPACC CRCX to BTS: speech_mode=0x%02x RTP_PAYLOAD=%d\n",
|
|
lchan->abis_ip.speech_mode, lchan->abis_ip.rtp_payload);
|
|
|
|
msg->dst = rsl_chan_link(lchan);
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
/*! Allocate buffer for IPA RSL MDCX and populate it with given parameters.
|
|
* \param[in] lchan Logical Channel for which we make MDCX
|
|
* \param[in] dest_ip The IP address to connect to
|
|
* \param[in] dest_port The port to connect to
|
|
*/
|
|
struct msgb *rsl_make_ipacc_mdcx(const struct gsm_lchan *lchan, uint32_t dest_ip, uint16_t dest_port)
|
|
{
|
|
struct msgb *msg;
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
uint32_t *att_ip;
|
|
|
|
int chan_nr = gsm_lchan2chan_nr(lchan, true);
|
|
if (chan_nr < 0)
|
|
return NULL;
|
|
|
|
msg = rsl_msgb_alloc();
|
|
|
|
dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
|
|
init_dchan_hdr(dh, RSL_MT_IPAC_MDCX);
|
|
dh->c.msg_discr = ABIS_RSL_MDISC_IPACCESS;
|
|
dh->chan_nr = chan_nr;
|
|
|
|
msgb_tv16_put(msg, RSL_IE_IPAC_CONN_ID, lchan->abis_ip.conn_id);
|
|
msgb_v_put(msg, RSL_IE_IPAC_REMOTE_IP);
|
|
att_ip = (uint32_t *)msgb_put(msg, sizeof(uint32_t));
|
|
*att_ip = htonl(dest_ip);
|
|
msgb_tv16_put(msg, RSL_IE_IPAC_REMOTE_PORT, dest_port);
|
|
msgb_tv_put(msg, RSL_IE_IPAC_SPEECH_MODE, lchan->abis_ip.speech_mode);
|
|
msgb_tv_put(msg, RSL_IE_IPAC_RTP_PAYLOAD, lchan->abis_ip.rtp_payload);
|
|
if (lchan->abis_ip.rtp_payload2)
|
|
msgb_tv_put(msg, RSL_IE_IPAC_RTP_PAYLOAD2, lchan->abis_ip.rtp_payload2);
|
|
|
|
msg->dst = rsl_chan_link(lchan);
|
|
|
|
return msg;
|
|
}
|
|
|
|
/*! Send IPA RSL MDCX to configure the RTP port the BTS sends to (MGW).
|
|
* \param[in] lchan Logical Channel for which we issue MDCX
|
|
* Remote (MGW) IP address, port and payload types for RTP are determined from lchan->abis_ip.
|
|
*/
|
|
int rsl_tx_ipacc_mdcx(const struct gsm_lchan *lchan)
|
|
{
|
|
struct msgb *msg = rsl_make_ipacc_mdcx(lchan, lchan->abis_ip.connect_ip, lchan->abis_ip.connect_port);
|
|
|
|
if (!msg)
|
|
return -EINVAL;
|
|
|
|
LOG_LCHAN(lchan, LOGL_DEBUG, "Sending IPACC MDCX to BTS:"
|
|
" %s:%u rtp_payload=%u rtp_payload2=%u conn_id=%u speech_mode=0x%02x\n",
|
|
ip_to_a(lchan->abis_ip.connect_ip),
|
|
lchan->abis_ip.connect_port,
|
|
lchan->abis_ip.rtp_payload,
|
|
lchan->abis_ip.rtp_payload2,
|
|
lchan->abis_ip.conn_id,
|
|
lchan->abis_ip.speech_mode);
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
static int abis_rsl_rx_ipacc_crcx_ack(struct msgb *msg)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh = msgb_l2(msg);
|
|
struct tlv_parsed tv;
|
|
struct gsm_lchan *lchan = msg->lchan;
|
|
|
|
if (!lchan->fi_rtp) {
|
|
LOG_LCHAN(msg->lchan, LOGL_ERROR, "Rx RSL IPACC: CRCX ACK message for unconfigured lchan\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* the BTS has acknowledged a local bind, it now tells us the IP
|
|
* address and port number to which it has bound the given logical
|
|
* channel */
|
|
|
|
rsl_tlv_parse(&tv, dh->data, msgb_l2len(msg)-sizeof(*dh));
|
|
if (!TLVP_PRESENT(&tv, RSL_IE_IPAC_LOCAL_PORT) ||
|
|
!TLVP_PRESENT(&tv, RSL_IE_IPAC_LOCAL_IP) ||
|
|
!TLVP_PRESENT(&tv, RSL_IE_IPAC_CONN_ID)) {
|
|
LOGP(DRSL, LOGL_NOTICE, "mandatory IE missing\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
ipac_parse_rtp(lchan, &tv, "CRCX");
|
|
|
|
osmo_fsm_inst_dispatch(lchan->fi_rtp, LCHAN_RTP_EV_IPACC_CRCX_ACK, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int abis_rsl_rx_ipacc_crcx_nack(struct msgb *msg)
|
|
{
|
|
struct e1inp_sign_link *sign_link = msg->dst;
|
|
struct gsm_lchan *lchan = msg->lchan;
|
|
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(sign_link->trx->bts->bts_ctrs, BTS_CTR_RSL_IPA_NACK));
|
|
|
|
if (!lchan->fi_rtp) {
|
|
LOG_LCHAN(msg->lchan, LOGL_ERROR, "Rx RSL IPACC: CRCX NACK message for unconfigured lchan\n");
|
|
return -EINVAL;
|
|
}
|
|
osmo_fsm_inst_dispatch(msg->lchan->fi_rtp, LCHAN_RTP_EV_IPACC_CRCX_NACK, 0);
|
|
return 0;
|
|
}
|
|
|
|
static int abis_rsl_rx_ipacc_mdcx_ack(struct msgb *msg)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh = msgb_l2(msg);
|
|
struct tlv_parsed tv;
|
|
struct gsm_lchan *lchan = msg->lchan;
|
|
|
|
if (!lchan->fi_rtp) {
|
|
LOG_LCHAN(msg->lchan, LOGL_ERROR, "Rx RSL IPACC: MDCX ACK message for unconfigured lchan\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* the BTS has acknowledged a remote connect request and
|
|
* it now tells us the IP address and port number to which it has
|
|
* connected the given logical channel */
|
|
|
|
rsl_tlv_parse(&tv, dh->data, msgb_l2len(msg)-sizeof(*dh));
|
|
ipac_parse_rtp(lchan, &tv, "MDCX");
|
|
|
|
osmo_fsm_inst_dispatch(lchan->fi_rtp, LCHAN_RTP_EV_IPACC_MDCX_ACK, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int abis_rsl_rx_ipacc_mdcx_nack(struct msgb *msg)
|
|
{
|
|
struct e1inp_sign_link *sign_link = msg->dst;
|
|
struct gsm_lchan *lchan = msg->lchan;
|
|
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(sign_link->trx->bts->bts_ctrs, BTS_CTR_RSL_IPA_NACK));
|
|
|
|
if (!lchan->fi_rtp) {
|
|
LOG_LCHAN(msg->lchan, LOGL_ERROR, "Rx RSL IPACC: MDCX NACK message for unconfigured lchan\n");
|
|
return -EINVAL;
|
|
}
|
|
osmo_fsm_inst_dispatch(msg->lchan->fi_rtp, LCHAN_RTP_EV_IPACC_MDCX_NACK, 0);
|
|
return 0;
|
|
}
|
|
|
|
static int abis_rsl_rx_ipacc_dlcx_ind(struct msgb *msg)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh = msgb_l2(msg);
|
|
struct tlv_parsed tv;
|
|
|
|
rsl_tlv_parse(&tv, dh->data, msgb_l2len(msg)-sizeof(*dh));
|
|
LOG_LCHAN(msg->lchan, LOGL_NOTICE, "Rx IPACC DLCX IND%s\n",
|
|
rsl_cause_name(&tv));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int abis_rsl_rx_ipacc(struct msgb *msg)
|
|
{
|
|
struct e1inp_sign_link *sign_link = msg->dst;
|
|
struct abis_rsl_rll_hdr *rllh = msgb_l2(msg);
|
|
int rc = 0;
|
|
|
|
msg->lchan = lchan_lookup(sign_link->trx, rllh->chan_nr,
|
|
"Abis RSL rx IPACC: ");
|
|
|
|
if (!msg->lchan) {
|
|
LOGP(DRSL, LOGL_ERROR,
|
|
"Rx RSL IPACC: unable to match RSL message to an lchan: chan_nr=0x%x\n",
|
|
rllh->chan_nr);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!msg->lchan->fi) {
|
|
LOG_LCHAN(msg->lchan, LOGL_ERROR, "Rx RSL IPACC: RSL message for unconfigured lchan\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
LOG_LCHAN(msg->lchan, LOGL_DEBUG, "Rx %s\n", rsl_or_ipac_msg_name(rllh->c.msg_type));
|
|
|
|
switch (rllh->c.msg_type) {
|
|
case RSL_MT_IPAC_CRCX_ACK:
|
|
rc = abis_rsl_rx_ipacc_crcx_ack(msg);
|
|
break;
|
|
case RSL_MT_IPAC_CRCX_NACK:
|
|
/* somehow the BTS was unable to bind the lchan to its local
|
|
* port?!? */
|
|
rc = abis_rsl_rx_ipacc_crcx_nack(msg);
|
|
break;
|
|
case RSL_MT_IPAC_MDCX_ACK:
|
|
/* the BTS tells us that a connect operation was successful */
|
|
rc = abis_rsl_rx_ipacc_mdcx_ack(msg);
|
|
break;
|
|
case RSL_MT_IPAC_MDCX_NACK:
|
|
/* somehow the BTS was unable to connect the lchan to a remote
|
|
* port */
|
|
rc = abis_rsl_rx_ipacc_mdcx_nack(msg);
|
|
break;
|
|
case RSL_MT_IPAC_DLCX_IND:
|
|
rc = abis_rsl_rx_ipacc_dlcx_ind(msg);
|
|
break;
|
|
default:
|
|
LOG_LCHAN(msg->lchan, LOGL_NOTICE, "Unknown ip.access msg_type 0x%02x\n",
|
|
rllh->c.msg_type);
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(sign_link->trx->bts->bts_ctrs, BTS_CTR_RSL_UNKNOWN));
|
|
break;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
/*! Tx simplified channel (de-)activation message for non-standard Osmocom dyn TS PDCH type. */
|
|
static int send_osmocom_style_pdch_chan_act(struct gsm_bts_trx_ts *ts, bool activate)
|
|
{
|
|
struct msgb *msg;
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
|
|
msg = rsl_msgb_alloc();
|
|
dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
|
|
init_dchan_hdr(dh, activate ? RSL_MT_CHAN_ACTIV : RSL_MT_RF_CHAN_REL);
|
|
|
|
dh->chan_nr = RSL_CHAN_OSMO_PDCH | (ts->nr & ~RSL_CHAN_NR_MASK);
|
|
|
|
if (activate) {
|
|
msgb_tv_put(msg, RSL_IE_ACT_TYPE, RSL_ACT_OSMO_PDCH);
|
|
|
|
if (ts->trx->bts->type == GSM_BTS_TYPE_RBS2000
|
|
&& ts->trx->bts->rbs2000.use_superchannel) {
|
|
const uint8_t eric_pgsl_tmr[] = { 30, 1 };
|
|
msgb_tv_fixed_put(msg, RSL_IE_ERIC_PGSL_TIMERS,
|
|
sizeof(eric_pgsl_tmr), eric_pgsl_tmr);
|
|
}
|
|
}
|
|
|
|
msg->dst = ts->trx->rsl_link_primary;
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
/*! Tx simplified channel (de-)activation message for non-standard ip.access dyn TS PDCH type. */
|
|
static int send_ipacc_style_pdch_act(struct gsm_bts_trx_ts *ts, bool activate)
|
|
{
|
|
struct msgb *msg;
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
|
|
int chan_nr = gsm_pchan2chan_nr(GSM_PCHAN_TCH_F, ts->nr, 0, false);
|
|
if (chan_nr < 0)
|
|
return chan_nr;
|
|
|
|
msg = rsl_msgb_alloc();
|
|
|
|
dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
|
|
init_dchan_hdr(dh, activate ? RSL_MT_IPAC_PDCH_ACT : RSL_MT_IPAC_PDCH_DEACT);
|
|
dh->c.msg_discr = ABIS_RSL_MDISC_DED_CHAN;
|
|
dh->chan_nr = chan_nr;
|
|
|
|
msg->dst = ts->trx->rsl_link_primary;
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
int rsl_tx_dyn_ts_pdch_act_deact(struct gsm_bts_trx_ts *ts, bool activate)
|
|
{
|
|
int rc;
|
|
const char *what;
|
|
const char *act;
|
|
|
|
switch (ts->pchan_on_init) {
|
|
case GSM_PCHAN_TCH_F_TCH_H_PDCH:
|
|
what = "Osmocom dyn TS";
|
|
act = activate? "PDCH Chan Activ" : "PDCH Chan RF Release";
|
|
|
|
rc = send_osmocom_style_pdch_chan_act(ts, activate);
|
|
break;
|
|
|
|
case GSM_PCHAN_TCH_F_PDCH:
|
|
what = "ip.access dyn TS";
|
|
act = activate? "PDCH ACT" : "PDCH DEACT";
|
|
|
|
rc = send_ipacc_style_pdch_act(ts, activate);
|
|
break;
|
|
|
|
default:
|
|
what = "static timeslot";
|
|
act = activate? "dynamic PDCH activation" : "dynamic PDCH deactivation";
|
|
rc = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (rc)
|
|
LOG_TS(ts, LOGL_ERROR, "Tx FAILED: %s: %s: %d (%s)\n",
|
|
what, act, rc, strerror(-rc));
|
|
else
|
|
LOG_TS(ts, LOGL_DEBUG, "Tx: %s: %s\n", what, act);
|
|
return rc;
|
|
}
|
|
|
|
/* Entry-point where L2 RSL from BTS enters */
|
|
int abis_rsl_rcvmsg(struct msgb *msg)
|
|
{
|
|
struct e1inp_sign_link *sign_link;
|
|
struct abis_rsl_common_hdr *rslh;
|
|
int rc = 0;
|
|
|
|
if (!msg) {
|
|
DEBUGP(DRSL, "Empty RSL msg?..\n");
|
|
return -1;
|
|
}
|
|
|
|
if (msgb_l2len(msg) < sizeof(*rslh)) {
|
|
DEBUGP(DRSL, "Truncated RSL message with l2len: %u\n", msgb_l2len(msg));
|
|
msgb_free(msg);
|
|
return -1;
|
|
}
|
|
|
|
sign_link = msg->dst;
|
|
rslh = msgb_l2(msg);
|
|
|
|
switch (rslh->msg_discr & 0xfe) {
|
|
case ABIS_RSL_MDISC_RLL:
|
|
rc = abis_rsl_rx_rll(msg);
|
|
break;
|
|
case ABIS_RSL_MDISC_DED_CHAN:
|
|
rc = abis_rsl_rx_dchan(msg);
|
|
break;
|
|
case ABIS_RSL_MDISC_COM_CHAN:
|
|
rc = abis_rsl_rx_cchan(msg);
|
|
break;
|
|
case ABIS_RSL_MDISC_TRX:
|
|
rc = abis_rsl_rx_trx(msg);
|
|
break;
|
|
case ABIS_RSL_MDISC_LOC:
|
|
LOGP(DRSL, LOGL_NOTICE, "unimplemented RSL msg disc 0x%02x\n",
|
|
rslh->msg_discr);
|
|
break;
|
|
case ABIS_RSL_MDISC_IPACCESS:
|
|
rc = abis_rsl_rx_ipacc(msg);
|
|
break;
|
|
default:
|
|
LOGP(DRSL, LOGL_NOTICE, "unknown RSL message discriminator "
|
|
"0x%02x\n", rslh->msg_discr);
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(sign_link->trx->bts->bts_ctrs, BTS_CTR_RSL_UNKNOWN));
|
|
rc = -EINVAL;
|
|
}
|
|
msgb_free(msg);
|
|
return rc;
|
|
}
|
|
|
|
/* Send an Osmocom-specific Abis RSL message for ETWS Primary Notification */
|
|
int rsl_etws_pn_command(struct gsm_bts *bts, uint8_t chan_nr, const uint8_t *data, int len)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
struct msgb *msg = rsl_msgb_alloc();
|
|
if (!msg)
|
|
return -1;
|
|
dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
|
|
init_dchan_hdr(dh, RSL_MT_OSMO_ETWS_CMD);
|
|
dh->c.msg_discr = ABIS_RSL_MDISC_COM_CHAN;
|
|
dh->chan_nr = chan_nr;
|
|
|
|
msgb_tlv_put(msg, RSL_IE_SMSCB_MSG, len, data);
|
|
|
|
msg->dst = bts->c0->rsl_link_primary;
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
int rsl_sms_cb_command(struct gsm_bts *bts, uint8_t chan_number,
|
|
struct rsl_ie_cb_cmd_type cb_command,
|
|
bool use_extended_cbch, const uint8_t *data, int len)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
struct msgb *cb_cmd;
|
|
|
|
cb_cmd = rsl_msgb_alloc();
|
|
if (!cb_cmd)
|
|
return -1;
|
|
|
|
dh = (struct abis_rsl_dchan_hdr *) msgb_put(cb_cmd, sizeof(*dh));
|
|
init_dchan_hdr(dh, RSL_MT_SMS_BC_CMD);
|
|
dh->c.msg_discr = ABIS_RSL_MDISC_COM_CHAN;
|
|
dh->chan_nr = chan_number; /* TODO: check the chan config */
|
|
|
|
msgb_tv_put(cb_cmd, RSL_IE_CB_CMD_TYPE, *(uint8_t*)&cb_command);
|
|
msgb_tlv_put(cb_cmd, RSL_IE_SMSCB_MSG, len, data);
|
|
if (use_extended_cbch)
|
|
msgb_tv_put(cb_cmd, RSL_IE_SMSCB_CHAN_INDICATOR, 0x01);
|
|
|
|
cb_cmd->dst = bts->c0->rsl_link_primary;
|
|
|
|
return abis_rsl_sendmsg(cb_cmd);
|
|
}
|
|
|
|
int rsl_nokia_si_begin(struct gsm_bts_trx *trx)
|
|
{
|
|
struct abis_rsl_common_hdr *ch;
|
|
struct msgb *msg = rsl_msgb_alloc();
|
|
|
|
ch = (struct abis_rsl_common_hdr *) msgb_put(msg, sizeof(*ch));
|
|
ch->msg_discr = ABIS_RSL_MDISC_TRX;
|
|
ch->msg_type = 0x40; /* Nokia SI Begin */
|
|
|
|
msg->dst = trx->rsl_link_primary;
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
int rsl_nokia_si_end(struct gsm_bts_trx *trx)
|
|
{
|
|
struct abis_rsl_common_hdr *ch;
|
|
struct msgb *msg = rsl_msgb_alloc();
|
|
|
|
ch = (struct abis_rsl_common_hdr *) msgb_put(msg, sizeof(*ch));
|
|
ch->msg_discr = ABIS_RSL_MDISC_TRX;
|
|
ch->msg_type = 0x41; /* Nokia SI End */
|
|
|
|
msgb_tv_put(msg, 0xFD, 0x00); /* Nokia Pagemode Info, No paging reorganisation required */
|
|
|
|
msg->dst = trx->rsl_link_primary;
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
int rsl_bs_power_control(struct gsm_bts_trx *trx, uint8_t channel, uint8_t reduction)
|
|
{
|
|
struct abis_rsl_common_hdr *ch;
|
|
struct msgb *msg = rsl_msgb_alloc();
|
|
|
|
ch = (struct abis_rsl_common_hdr *) msgb_put(msg, sizeof(*ch));
|
|
ch->msg_discr = ABIS_RSL_MDISC_DED_CHAN;
|
|
ch->msg_type = RSL_MT_BS_POWER_CONTROL;
|
|
|
|
msgb_tv_put(msg, RSL_IE_CHAN_NR, channel);
|
|
msgb_tv_put(msg, RSL_IE_BS_POWER, reduction); /* reduction in 2dB steps */
|
|
|
|
msg->dst = trx->rsl_link_primary;
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
struct e1inp_sign_link *rsl_chan_link(const struct gsm_lchan *lchan)
|
|
{
|
|
return lchan->ts->trx->rsl_link_primary;
|
|
}
|