1689 lines
45 KiB
C
1689 lines
45 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) 2008-2010 by Harald Welte <laforge@gnumonks.org>
|
|
*
|
|
* All Rights Reserved
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <errno.h>
|
|
#include <sys/types.h>
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
|
|
#include <openbsc/gsm_data.h>
|
|
#include <openbsc/gsm_04_08.h>
|
|
#include <osmocore/gsm_utils.h>
|
|
#include <openbsc/abis_rsl.h>
|
|
#include <openbsc/chan_alloc.h>
|
|
#include <openbsc/bsc_rll.h>
|
|
#include <openbsc/debug.h>
|
|
#include <osmocore/tlv.h>
|
|
#include <openbsc/paging.h>
|
|
#include <openbsc/signal.h>
|
|
#include <openbsc/meas_rep.h>
|
|
#include <openbsc/rtp_proxy.h>
|
|
#include <osmocore/rsl.h>
|
|
|
|
#define RSL_ALLOC_SIZE 1024
|
|
#define RSL_ALLOC_HEADROOM 128
|
|
|
|
#define MAX(a, b) (a) >= (b) ? (a) : (b)
|
|
|
|
static u_int8_t mdisc_by_msgtype(u_int8_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,
|
|
u_int8_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;
|
|
}
|
|
|
|
/* determine logical channel based on TRX and channel number IE */
|
|
struct gsm_lchan *lchan_lookup(struct gsm_bts_trx *trx, u_int8_t chan_nr)
|
|
{
|
|
struct gsm_lchan *lchan;
|
|
u_int8_t ts_nr = chan_nr & 0x07;
|
|
u_int8_t cbits = chan_nr >> 3;
|
|
u_int8_t lch_idx;
|
|
struct gsm_bts_trx_ts *ts = &trx->ts[ts_nr];
|
|
|
|
if (cbits == 0x01) {
|
|
lch_idx = 0; /* TCH/F */
|
|
if (ts->pchan != GSM_PCHAN_TCH_F &&
|
|
ts->pchan != GSM_PCHAN_PDCH &&
|
|
ts->pchan != GSM_PCHAN_TCH_F_PDCH)
|
|
LOGP(DRSL, LOGL_ERROR, "chan_nr=0x%02x but pchan=%u\n",
|
|
chan_nr, ts->pchan);
|
|
} else if ((cbits & 0x1e) == 0x02) {
|
|
lch_idx = cbits & 0x1; /* TCH/H */
|
|
if (ts->pchan != GSM_PCHAN_TCH_H)
|
|
LOGP(DRSL, LOGL_ERROR, "chan_nr=0x%02x but pchan=%u\n",
|
|
chan_nr, ts->pchan);
|
|
} else if ((cbits & 0x1c) == 0x04) {
|
|
lch_idx = cbits & 0x3; /* SDCCH/4 */
|
|
if (ts->pchan != GSM_PCHAN_CCCH_SDCCH4)
|
|
LOGP(DRSL, LOGL_ERROR, "chan_nr=0x%02x but pchan=%u\n",
|
|
chan_nr, ts->pchan);
|
|
} else if ((cbits & 0x18) == 0x08) {
|
|
lch_idx = cbits & 0x7; /* SDCCH/8 */
|
|
if (ts->pchan != GSM_PCHAN_SDCCH8_SACCH8C)
|
|
LOGP(DRSL, LOGL_ERROR, "chan_nr=0x%02x but pchan=%u\n",
|
|
chan_nr, ts->pchan);
|
|
} else if (cbits == 0x10 || cbits == 0x11 || cbits == 0x12) {
|
|
lch_idx = 0;
|
|
if (ts->pchan != GSM_PCHAN_CCCH &&
|
|
ts->pchan != GSM_PCHAN_CCCH_SDCCH4)
|
|
LOGP(DRSL, LOGL_ERROR, "chan_nr=0x%02x but pchan=%u\n",
|
|
chan_nr, ts->pchan);
|
|
/* FIXME: we should not return first sdcch4 !!! */
|
|
} else {
|
|
LOGP(DRSL, LOGL_ERROR, "unknown chan_nr=0x%02x\n", chan_nr);
|
|
return NULL;
|
|
}
|
|
|
|
lchan = &ts->lchan[lch_idx];
|
|
debug_set_context(BSC_CTX_LCHAN, lchan);
|
|
debug_set_context(BSC_CTX_SUBSCR, lchan->subscr);
|
|
|
|
return lchan;
|
|
}
|
|
|
|
/* See Table 10.5.25 of GSM04.08 */
|
|
u_int8_t lchan2chan_nr(const struct gsm_lchan *lchan)
|
|
{
|
|
struct gsm_bts_trx_ts *ts = lchan->ts;
|
|
u_int8_t cbits, chan_nr;
|
|
|
|
switch (ts->pchan) {
|
|
case GSM_PCHAN_TCH_F:
|
|
case GSM_PCHAN_PDCH:
|
|
case GSM_PCHAN_TCH_F_PDCH:
|
|
cbits = 0x01;
|
|
break;
|
|
case GSM_PCHAN_TCH_H:
|
|
cbits = 0x02;
|
|
cbits += lchan->nr;
|
|
break;
|
|
case GSM_PCHAN_CCCH_SDCCH4:
|
|
cbits = 0x04;
|
|
cbits += lchan->nr;
|
|
break;
|
|
case GSM_PCHAN_SDCCH8_SACCH8C:
|
|
cbits = 0x08;
|
|
cbits += lchan->nr;
|
|
break;
|
|
default:
|
|
case GSM_PCHAN_CCCH:
|
|
cbits = 0x10;
|
|
break;
|
|
}
|
|
|
|
chan_nr = (cbits << 3) | (ts->nr & 0x7);
|
|
|
|
return chan_nr;
|
|
}
|
|
|
|
/* As per TS 03.03 Section 2.2, the IMSI has 'not more than 15 digits' */
|
|
u_int64_t str_to_imsi(const char *imsi_str)
|
|
{
|
|
u_int64_t ret;
|
|
|
|
ret = strtoull(imsi_str, NULL, 10);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Table 5 Clause 7 TS 05.02 */
|
|
unsigned int n_pag_blocks(int bs_ccch_sdcch_comb, unsigned int bs_ag_blks_res)
|
|
{
|
|
if (!bs_ccch_sdcch_comb)
|
|
return 9 - bs_ag_blks_res;
|
|
else
|
|
return 3 - bs_ag_blks_res;
|
|
}
|
|
|
|
/* Chapter 6.5.2 of TS 05.02 */
|
|
unsigned int get_ccch_group(u_int64_t imsi, unsigned int bs_cc_chans,
|
|
unsigned int n_pag_blocks)
|
|
{
|
|
return (imsi % 1000) % (bs_cc_chans * n_pag_blocks) / n_pag_blocks;
|
|
}
|
|
|
|
/* Chapter 6.5.2 of TS 05.02 */
|
|
unsigned int get_paging_group(u_int64_t imsi, unsigned int bs_cc_chans,
|
|
int n_pag_blocks)
|
|
{
|
|
return (imsi % 1000) % (bs_cc_chans * n_pag_blocks) % n_pag_blocks;
|
|
}
|
|
|
|
static struct msgb *rsl_msgb_alloc(void)
|
|
{
|
|
return msgb_alloc_headroom(RSL_ALLOC_SIZE, RSL_ALLOC_HEADROOM,
|
|
"RSL");
|
|
}
|
|
|
|
#define MACBLOCK_SIZE 23
|
|
static void pad_macblock(u_int8_t *out, const u_int8_t *in, int len)
|
|
{
|
|
memcpy(out, in, len);
|
|
|
|
if (len < MACBLOCK_SIZE)
|
|
memset(out+len, 0x2b, MACBLOCK_SIZE-len);
|
|
}
|
|
|
|
/* Chapter 9.3.7: Encryption Information */
|
|
static int build_encr_info(u_int8_t *out, struct gsm_lchan *lchan)
|
|
{
|
|
*out++ = lchan->encr.alg_id & 0xff;
|
|
if (lchan->encr.key_len)
|
|
memcpy(out, lchan->encr.key, lchan->encr.key_len);
|
|
return lchan->encr.key_len + 1;
|
|
}
|
|
|
|
static void print_rsl_cause(int lvl, const u_int8_t *cause_v, u_int8_t cause_len)
|
|
{
|
|
int i;
|
|
|
|
LOGPC(DRSL, lvl, "CAUSE=0x%02x(%s) ",
|
|
cause_v[0], rsl_err_name(cause_v[0]));
|
|
for (i = 1; i < cause_len-1; i++)
|
|
LOGPC(DRSL, lvl, "%02x ", cause_v[i]);
|
|
}
|
|
|
|
/* Send a BCCH_INFO message as per Chapter 8.5.1 */
|
|
int rsl_bcch_info(struct gsm_bts_trx *trx, u_int8_t type,
|
|
const u_int8_t *data, int len)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
struct msgb *msg = rsl_msgb_alloc();
|
|
|
|
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;
|
|
|
|
msgb_tv_put(msg, RSL_IE_SYSINFO_TYPE, type);
|
|
msgb_tlv_put(msg, RSL_IE_FULL_BCCH_INFO, len, data);
|
|
|
|
msg->trx = trx;
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
int rsl_sacch_filling(struct gsm_bts_trx *trx, u_int8_t type,
|
|
const u_int8_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);
|
|
msgb_tl16v_put(msg, RSL_IE_L3_INFO, len, data);
|
|
|
|
msg->trx = trx;
|
|
|
|
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;
|
|
u_int8_t chan_nr = lchan2chan_nr(lchan);
|
|
|
|
db = abs(db);
|
|
if (db > 30)
|
|
return -EINVAL;
|
|
|
|
msg = rsl_msgb_alloc();
|
|
|
|
lchan->bs_power = db/2;
|
|
if (fpc)
|
|
lchan->bs_power |= 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, lchan->bs_power);
|
|
|
|
msg->trx = lchan->ts->trx;
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
int rsl_chan_ms_power_ctrl(struct gsm_lchan *lchan, unsigned int fpc, int dbm)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
struct msgb *msg;
|
|
u_int8_t chan_nr = lchan2chan_nr(lchan);
|
|
int ctl_lvl;
|
|
|
|
ctl_lvl = ms_pwr_ctl_lvl(lchan->ts->trx->bts->band, dbm);
|
|
if (ctl_lvl < 0)
|
|
return ctl_lvl;
|
|
|
|
msg = rsl_msgb_alloc();
|
|
|
|
lchan->ms_power = ctl_lvl;
|
|
|
|
if (fpc)
|
|
lchan->ms_power |= 0x20;
|
|
|
|
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);
|
|
|
|
msg->trx = lchan->ts->trx;
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
static int channel_mode_from_lchan(struct rsl_ie_chan_mode *cm,
|
|
struct gsm_lchan *lchan)
|
|
{
|
|
memset(cm, 0, sizeof(cm));
|
|
|
|
/* FIXME: what to do with data calls ? */
|
|
cm->dtx_dtu = 0x00;
|
|
|
|
/* set TCH Speech/Data */
|
|
cm->spd_ind = lchan->rsl_cmode;
|
|
|
|
if (lchan->rsl_cmode == RSL_CMOD_SPD_SIGN &&
|
|
lchan->tch_mode != GSM48_CMODE_SIGN)
|
|
LOGP(DRSL, LOGL_ERROR, "unsupported: rsl_mode == signalling, "
|
|
"but tch_mode != signalling\n");
|
|
|
|
switch (lchan->type) {
|
|
case GSM_LCHAN_SDCCH:
|
|
cm->chan_rt = RSL_CMOD_CRT_SDCCH;
|
|
break;
|
|
case GSM_LCHAN_TCH_F:
|
|
cm->chan_rt = RSL_CMOD_CRT_TCH_Bm;
|
|
break;
|
|
case GSM_LCHAN_TCH_H:
|
|
cm->chan_rt = RSL_CMOD_CRT_TCH_Lm;
|
|
break;
|
|
case GSM_LCHAN_NONE:
|
|
case GSM_LCHAN_UNKNOWN:
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
switch (lchan->tch_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:
|
|
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:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Chapter 8.4.1 */
|
|
#if 0
|
|
int rsl_chan_activate(struct gsm_bts_trx *trx, u_int8_t chan_nr,
|
|
u_int8_t act_type,
|
|
struct rsl_ie_chan_mode *chan_mode,
|
|
struct rsl_ie_chan_ident *chan_ident,
|
|
u_int8_t bs_power, u_int8_t ms_power,
|
|
u_int8_t ta)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
struct msgb *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);
|
|
/* For compatibility with Phase 1 */
|
|
msgb_tlv_put(msg, RSL_IE_CHAN_MODE, sizeof(*chan_mode),
|
|
(u_int8_t *) chan_mode);
|
|
msgb_tlv_put(msg, RSL_IE_CHAN_IDENT, 4,
|
|
(u_int8_t *) chan_ident);
|
|
#if 0
|
|
msgb_tlv_put(msg, RSL_IE_ENCR_INFO, 1,
|
|
(u_int8_t *) &encr_info);
|
|
#endif
|
|
msgb_tv_put(msg, RSL_IE_BS_POWER, bs_power);
|
|
msgb_tv_put(msg, RSL_IE_MS_POWER, ms_power);
|
|
msgb_tv_put(msg, RSL_IE_TIMING_ADVANCE, ta);
|
|
|
|
msg->trx = trx;
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
#endif
|
|
|
|
int rsl_chan_activate_lchan(struct gsm_lchan *lchan, u_int8_t act_type,
|
|
u_int8_t ta, u_int8_t ho_ref)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
struct msgb *msg;
|
|
int rc;
|
|
|
|
u_int8_t chan_nr = lchan2chan_nr(lchan);
|
|
u_int16_t arfcn = lchan->ts->trx->arfcn;
|
|
struct rsl_ie_chan_mode cm;
|
|
struct rsl_ie_chan_ident ci;
|
|
|
|
rc = channel_mode_from_lchan(&cm, lchan);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
memset(&ci, 0, sizeof(ci));
|
|
ci.chan_desc.iei = 0x64;
|
|
ci.chan_desc.chan_nr = chan_nr;
|
|
ci.chan_desc.oct3 = (lchan->ts->trx->bts->tsc << 5) | ((arfcn & 0x3ff) >> 8);
|
|
ci.chan_desc.oct4 = arfcn & 0xff;
|
|
|
|
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),
|
|
(u_int8_t *) &cm);
|
|
/* For compatibility with Phase 1 */
|
|
msgb_tlv_put(msg, RSL_IE_CHAN_IDENT, 4,
|
|
(u_int8_t *) &ci);
|
|
|
|
if (lchan->encr.alg_id > RSL_ENC_ALG_A5(0)) {
|
|
u_int8_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);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
msgb_tv_put(msg, RSL_IE_BS_POWER, lchan->bs_power);
|
|
msgb_tv_put(msg, RSL_IE_MS_POWER, lchan->ms_power);
|
|
msgb_tv_put(msg, RSL_IE_TIMING_ADVANCE, ta);
|
|
|
|
if (lchan->tch_mode == GSM48_CMODE_SPEECH_AMR)
|
|
msgb_tlv_put(msg, RSL_IE_MR_CONFIG, sizeof(lchan->mr_conf),
|
|
(u_int8_t *) &lchan->mr_conf);
|
|
|
|
msg->trx = lchan->ts->trx;
|
|
|
|
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;
|
|
|
|
u_int8_t chan_nr = lchan2chan_nr(lchan);
|
|
struct rsl_ie_chan_mode cm;
|
|
|
|
rc = channel_mode_from_lchan(&cm, lchan);
|
|
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),
|
|
(u_int8_t *) &cm);
|
|
|
|
if (lchan->encr.alg_id > RSL_ENC_ALG_A5(0)) {
|
|
u_int8_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 (lchan->tch_mode == GSM48_CMODE_SPEECH_AMR) {
|
|
msgb_tlv_put(msg, RSL_IE_MR_CONFIG, sizeof(lchan->mr_conf),
|
|
(u_int8_t *) &lchan->mr_conf);
|
|
}
|
|
|
|
msg->trx = lchan->ts->trx;
|
|
|
|
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;
|
|
u_int8_t chan_nr = lchan2chan_nr(lchan);
|
|
u_int8_t encr_info[MAX_A5_KEY_LEN+2];
|
|
u_int8_t l3_len = msg->len;
|
|
int rc;
|
|
|
|
/* 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->trx = lchan->ts->trx;
|
|
|
|
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();
|
|
|
|
dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
|
|
init_dchan_hdr(dh, RSL_MT_DEACTIVATE_SACCH);
|
|
dh->chan_nr = lchan2chan_nr(lchan);
|
|
|
|
msg->lchan = lchan;
|
|
msg->trx = lchan->ts->trx;
|
|
|
|
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_rf_chan_release(struct gsm_lchan *lchan)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
struct msgb *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 = lchan2chan_nr(lchan);
|
|
|
|
msg->lchan = lchan;
|
|
msg->trx = lchan->ts->trx;
|
|
|
|
DEBUGP(DRSL, "%s RF Channel Release CMD\n", gsm_lchan_name(lchan));
|
|
|
|
/* BTS will respond by RF CHAN REL ACK */
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
int rsl_paging_cmd(struct gsm_bts *bts, u_int8_t paging_group, u_int8_t len,
|
|
u_int8_t *ms_ident, u_int8_t chan_needed)
|
|
{
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
struct msgb *msg = rsl_msgb_alloc();
|
|
|
|
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);
|
|
msgb_tlv_put(msg, RSL_IE_MS_IDENTITY, len-2, ms_ident+2);
|
|
msgb_tv_put(msg, RSL_IE_CHAN_NEEDED, chan_needed);
|
|
|
|
msg->trx = bts->c0;
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
int rsl_paging_cmd_subscr(struct gsm_bts *bts, u_int8_t chan_need,
|
|
struct gsm_subscriber *subscr)
|
|
{
|
|
#if 0
|
|
u_int8_t mi[128];
|
|
unsigned int mi_len;
|
|
u_int8_t paging_group;
|
|
#endif
|
|
|
|
return -1;
|
|
}
|
|
|
|
int imsi_str2bcd(u_int8_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 */
|
|
int rsl_imm_assign_cmd(struct gsm_bts *bts, u_int8_t len, u_int8_t *val)
|
|
{
|
|
struct msgb *msg = rsl_msgb_alloc();
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
u_int8_t buf[MACBLOCK_SIZE];
|
|
|
|
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, MACBLOCK_SIZE, buf);
|
|
break;
|
|
}
|
|
|
|
msg->trx = bts->c0;
|
|
|
|
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 = rsl_msgb_alloc();
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
|
|
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 = lchan2chan_nr(lchan);
|
|
msgb_tv_put(msg, RSL_IE_SIEMENS_MRPCI, *(u_int8_t *)mrpci);
|
|
|
|
DEBUGP(DRSL, "%s TX Siemens MRPCI 0x%02x\n",
|
|
gsm_lchan_name(lchan), *(u_int8_t *)mrpci);
|
|
|
|
msg->trx = lchan->ts->trx;
|
|
|
|
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, u_int8_t link_id)
|
|
{
|
|
if (msg->lchan == NULL) {
|
|
LOGP(DRSL, LOGL_ERROR, "cannot send DATA REQUEST to unknown lchan\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
rsl_rll_push_l3(msg, RSL_MT_DATA_REQ, lchan2chan_nr(msg->lchan),
|
|
link_id, 1);
|
|
|
|
msg->trx = msg->lchan->ts->trx;
|
|
|
|
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, u_int8_t link_id)
|
|
{
|
|
struct msgb *msg;
|
|
|
|
msg = rsl_rll_simple(RSL_MT_EST_REQ, lchan2chan_nr(lchan),
|
|
link_id, 0);
|
|
msg->trx = lchan->ts->trx;
|
|
|
|
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, u_int8_t link_id)
|
|
{
|
|
|
|
struct msgb *msg;
|
|
|
|
msg = rsl_rll_simple(RSL_MT_REL_REQ, lchan2chan_nr(lchan),
|
|
link_id, 0);
|
|
msgb_tv_put(msg, RSL_IE_RELEASE_MODE, 0); /* normal release */
|
|
|
|
lchan->state = LCHAN_S_REL_REQ;
|
|
/* FIXME: start some timer in case we don't receive a REL ACK ? */
|
|
|
|
msg->trx = lchan->ts->trx;
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
/* Chapter 8.4.2: Channel Activate Acknowledge */
|
|
static int rsl_rx_chan_act_ack(struct msgb *msg)
|
|
{
|
|
struct abis_rsl_dchan_hdr *rslh = msgb_l2(msg);
|
|
|
|
/* BTS has confirmed channel activation, we now need
|
|
* to assign the activated channel to the MS */
|
|
if (rslh->ie_chan != RSL_IE_CHAN_NR)
|
|
return -EINVAL;
|
|
|
|
if (msg->lchan->state != LCHAN_S_ACT_REQ)
|
|
LOGP(DRSL, LOGL_NOTICE, "%s CHAN ACT ACK, but state %s\n",
|
|
gsm_lchan_name(msg->lchan),
|
|
gsm_lchans_name(msg->lchan->state));
|
|
msg->lchan->state = LCHAN_S_ACTIVE;
|
|
|
|
dispatch_signal(SS_LCHAN, S_LCHAN_ACTIVATE_ACK, msg->lchan);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* 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;
|
|
|
|
LOGP(DRSL, LOGL_ERROR, "%s CHANNEL ACTIVATE NACK",
|
|
gsm_lchan_name(msg->lchan));
|
|
|
|
/* BTS has rejected channel activation ?!? */
|
|
if (dh->ie_chan != RSL_IE_CHAN_NR)
|
|
return -EINVAL;
|
|
|
|
rsl_tlv_parse(&tp, dh->data, msgb_l2len(msg)-sizeof(*dh));
|
|
if (TLVP_PRESENT(&tp, RSL_IE_CAUSE)) {
|
|
const u_int8_t *cause = TLVP_VAL(&tp, RSL_IE_CAUSE);
|
|
print_rsl_cause(LOGL_ERROR, cause,
|
|
TLVP_LEN(&tp, RSL_IE_CAUSE));
|
|
if (*cause != RSL_ERR_RCH_ALR_ACTV_ALLOC)
|
|
msg->lchan->state = LCHAN_S_NONE;
|
|
} else
|
|
msg->lchan->state = LCHAN_S_NONE;
|
|
|
|
LOGPC(DRSL, LOGL_ERROR, "\n");
|
|
|
|
dispatch_signal(SS_LCHAN, S_LCHAN_ACTIVATE_NACK, msg->lchan);
|
|
|
|
lchan_free(msg->lchan);
|
|
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 tlv_parsed tp;
|
|
|
|
/* FIXME: print which channel */
|
|
LOGP(DRSL, LOGL_NOTICE, "%s CONNECTION FAIL: RELEASING ",
|
|
gsm_lchan_name(msg->lchan));
|
|
|
|
rsl_tlv_parse(&tp, dh->data, msgb_l2len(msg)-sizeof(*dh));
|
|
|
|
if (TLVP_PRESENT(&tp, RSL_IE_CAUSE))
|
|
print_rsl_cause(LOGL_NOTICE, TLVP_VAL(&tp, RSL_IE_CAUSE),
|
|
TLVP_LEN(&tp, RSL_IE_CAUSE));
|
|
|
|
LOGPC(DRSL, LOGL_NOTICE, "\n");
|
|
/* FIXME: only free it after channel release ACK */
|
|
return rsl_rf_chan_release(msg->lchan);
|
|
}
|
|
|
|
static void print_meas_rep_uni(struct gsm_meas_rep_unidir *mru,
|
|
const char *prefix)
|
|
{
|
|
DEBUGPC(DMEAS, "RXL-FULL-%s=%3ddBm RXL-SUB-%s=%3ddBm ",
|
|
prefix, rxlev2dbm(mru->full.rx_lev),
|
|
prefix, rxlev2dbm(mru->sub.rx_lev));
|
|
DEBUGPC(DMEAS, "RXQ-FULL-%s=%d RXQ-SUB-%s=%d ",
|
|
prefix, mru->full.rx_qual, prefix, mru->sub.rx_qual);
|
|
}
|
|
|
|
static void print_meas_rep(struct gsm_meas_rep *mr)
|
|
{
|
|
int i;
|
|
|
|
DEBUGP(DMEAS, "MEASUREMENT RESULT NR=%d ", mr->nr);
|
|
|
|
if (mr->flags & MEAS_REP_F_DL_DTX)
|
|
DEBUGPC(DMEAS, "DTXd ");
|
|
|
|
print_meas_rep_uni(&mr->ul, "ul");
|
|
DEBUGPC(DMEAS, "BS_POWER=%d ", mr->bs_power);
|
|
if (mr->flags & MEAS_REP_F_MS_TO)
|
|
DEBUGPC(DMEAS, "MS_TO=%d ", mr->ms_timing_offset);
|
|
|
|
if (mr->flags & MEAS_REP_F_MS_L1) {
|
|
DEBUGPC(DMEAS, "L1_MS_PWR=%3ddBm ", mr->ms_l1.pwr);
|
|
DEBUGPC(DMEAS, "L1_FPC=%u ",
|
|
mr->flags & MEAS_REP_F_FPC ? 1 : 0);
|
|
DEBUGPC(DMEAS, "L1_TA=%u ", mr->ms_l1.ta);
|
|
}
|
|
|
|
if (mr->flags & MEAS_REP_F_UL_DTX)
|
|
DEBUGPC(DMEAS, "DTXu ");
|
|
if (mr->flags & MEAS_REP_F_BA1)
|
|
DEBUGPC(DMEAS, "BA1 ");
|
|
if (!(mr->flags & MEAS_REP_F_DL_VALID))
|
|
DEBUGPC(DMEAS, "NOT VALID ");
|
|
else
|
|
print_meas_rep_uni(&mr->dl, "dl");
|
|
|
|
DEBUGPC(DMEAS, "NUM_NEIGH=%u\n", mr->num_cell);
|
|
if (mr->num_cell == 7)
|
|
return;
|
|
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));
|
|
}
|
|
}
|
|
|
|
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);
|
|
u_int8_t len;
|
|
const u_int8_t *val;
|
|
int rc;
|
|
|
|
/* check if this channel is actually active */
|
|
/* FIXME: maybe this check should be way more generic/centralized */
|
|
if (msg->lchan->state != LCHAN_S_ACTIVE) {
|
|
LOGP(DRSL, LOGL_NOTICE, "%s: MEAS RES for inactive channel\n",
|
|
gsm_lchan_name(msg->lchan));
|
|
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))
|
|
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;
|
|
}
|
|
|
|
mr->bs_power = *TLVP_VAL(&tp, RSL_IE_BS_POWER);
|
|
|
|
/* Optional Parts */
|
|
if (TLVP_PRESENT(&tp, RSL_IE_MS_TIMING_OFFSET))
|
|
mr->ms_timing_offset =
|
|
*TLVP_VAL(&tp, RSL_IE_MS_TIMING_OFFSET);
|
|
|
|
if (TLVP_PRESENT(&tp, RSL_IE_L1_INFO)) {
|
|
val = TLVP_VAL(&tp, RSL_IE_L1_INFO);
|
|
mr->flags |= MEAS_REP_F_MS_L1;
|
|
mr->ms_l1.pwr = ms_pwr_dbm(msg->trx->bts->band, val[0] >> 3);
|
|
if (val[0] & 0x04)
|
|
mr->flags |= MEAS_REP_F_FPC;
|
|
mr->ms_l1.ta = val[1];
|
|
}
|
|
if (TLVP_PRESENT(&tp, RSL_IE_L3_INFO)) {
|
|
msg->l3h = (u_int8_t *) TLVP_VAL(&tp, RSL_IE_L3_INFO);
|
|
rc = gsm48_parse_meas_rep(mr, msg);
|
|
if (rc < 0)
|
|
return rc;
|
|
}
|
|
|
|
print_meas_rep(mr);
|
|
|
|
dispatch_signal(SS_LCHAN, S_LCHAN_MEAS_REP, 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;
|
|
|
|
DEBUGP(DRSL, "%s HANDOVER DETECT ", gsm_lchan_name(msg->lchan));
|
|
|
|
rsl_tlv_parse(&tp, dh->data, msgb_l2len(msg)-sizeof(*dh));
|
|
|
|
if (TLVP_PRESENT(&tp, RSL_IE_ACCESS_DELAY))
|
|
DEBUGPC(DRSL, "access delay = %u\n",
|
|
*TLVP_VAL(&tp, RSL_IE_ACCESS_DELAY));
|
|
else
|
|
DEBUGPC(DRSL, "\n");
|
|
|
|
dispatch_signal(SS_LCHAN, S_LCHAN_HANDOVER_DETECT, msg->lchan);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int abis_rsl_rx_dchan(struct msgb *msg)
|
|
{
|
|
struct abis_rsl_dchan_hdr *rslh = msgb_l2(msg);
|
|
int rc = 0;
|
|
char *ts_name;
|
|
|
|
msg->lchan = lchan_lookup(msg->trx, rslh->chan_nr);
|
|
ts_name = gsm_lchan_name(msg->lchan);
|
|
|
|
switch (rslh->c.msg_type) {
|
|
case RSL_MT_CHAN_ACTIV_ACK:
|
|
DEBUGP(DRSL, "%s CHANNEL ACTIVATE ACK\n", ts_name);
|
|
rc = rsl_rx_chan_act_ack(msg);
|
|
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:
|
|
DEBUGP(DRSL, "%s RF CHANNEL RELEASE ACK\n", ts_name);
|
|
if (msg->lchan->state != LCHAN_S_REL_REQ)
|
|
LOGP(DRSL, LOGL_NOTICE, "%s CHAN REL ACK but state %s\n",
|
|
gsm_lchan_name(msg->lchan),
|
|
gsm_lchans_name(msg->lchan->state));
|
|
msg->lchan->state = LCHAN_S_NONE;
|
|
lchan_free(msg->lchan);
|
|
break;
|
|
case RSL_MT_MODE_MODIFY_ACK:
|
|
DEBUGP(DRSL, "%s CHANNEL MODE MODIFY ACK\n", ts_name);
|
|
break;
|
|
case RSL_MT_MODE_MODIFY_NACK:
|
|
LOGP(DRSL, LOGL_ERROR, "%s CHANNEL MODE MODIFY NACK\n", ts_name);
|
|
break;
|
|
case RSL_MT_IPAC_PDCH_ACT_ACK:
|
|
DEBUGPC(DRSL, "%s IPAC PDCH ACT ACK\n", ts_name);
|
|
break;
|
|
case RSL_MT_IPAC_PDCH_ACT_NACK:
|
|
LOGP(DRSL, LOGL_ERROR, "%s IPAC PDCH ACT NACK\n", ts_name);
|
|
break;
|
|
case RSL_MT_IPAC_PDCH_DEACT_ACK:
|
|
DEBUGP(DRSL, "%s IPAC PDCH DEACT ACK\n", ts_name);
|
|
break;
|
|
case RSL_MT_IPAC_PDCH_DEACT_NACK:
|
|
LOGP(DRSL, LOGL_ERROR, "%s IPAC PDCH DEACT NACK\n", ts_name);
|
|
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:
|
|
LOGP(DRSL, LOGL_NOTICE, "%s Unimplemented Abis RSL DChan "
|
|
"msg 0x%02x\n", ts_name, rslh->c.msg_type);
|
|
break;
|
|
default:
|
|
LOGP(DRSL, LOGL_NOTICE, "%s unknown Abis RSL DChan msg 0x%02x\n",
|
|
ts_name, rslh->c.msg_type);
|
|
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;
|
|
|
|
LOGP(DRSL, LOGL_ERROR, "%s ERROR REPORT ", gsm_trx_name(msg->trx));
|
|
|
|
rsl_tlv_parse(&tp, rslh->data, msgb_l2len(msg)-sizeof(*rslh));
|
|
|
|
if (TLVP_PRESENT(&tp, RSL_IE_CAUSE))
|
|
print_rsl_cause(LOGL_ERROR, TLVP_VAL(&tp, RSL_IE_CAUSE),
|
|
TLVP_LEN(&tp, RSL_IE_CAUSE));
|
|
|
|
LOGPC(DRSL, LOGL_ERROR, "\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int abis_rsl_rx_trx(struct msgb *msg)
|
|
{
|
|
struct abis_rsl_common_hdr *rslh = msgb_l2(msg);
|
|
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(msg->trx));
|
|
break;
|
|
case RSL_MT_OVERLOAD:
|
|
/* indicate CCCH / ACCH / processor overload */
|
|
LOGP(DRSL, LOGL_ERROR, "%s CCCH/ACCH/CPU Overload\n",
|
|
gsm_trx_name(msg->trx));
|
|
break;
|
|
default:
|
|
LOGP(DRSL, LOGL_NOTICE, "%s Unknown Abis RSL TRX message "
|
|
"type 0x%02x\n", gsm_trx_name(msg->trx), rslh->msg_type);
|
|
return -EINVAL;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
/* If T3101 expires, we never received a response to IMMEDIATE ASSIGN */
|
|
static void t3101_expired(void *data)
|
|
{
|
|
struct gsm_lchan *lchan = data;
|
|
|
|
rsl_rf_chan_release(lchan);
|
|
}
|
|
|
|
/* MS has requested a channel on the RACH */
|
|
static int rsl_rx_chan_rqd(struct msgb *msg)
|
|
{
|
|
struct gsm_bts *bts = msg->trx->bts;
|
|
struct abis_rsl_dchan_hdr *rqd_hdr = msgb_l2(msg);
|
|
struct gsm48_req_ref *rqd_ref;
|
|
struct gsm48_imm_ass ia;
|
|
enum gsm_chan_t lctype;
|
|
enum gsm_chreq_reason_t chreq_reason;
|
|
struct gsm_lchan *lchan;
|
|
u_int8_t rqd_ta;
|
|
int ret;
|
|
|
|
u_int16_t arfcn;
|
|
u_int8_t ts_number, subch;
|
|
|
|
/* parse request reference to be used in immediate assign */
|
|
if (rqd_hdr->data[0] != RSL_IE_REQ_REFERENCE)
|
|
return -EINVAL;
|
|
|
|
rqd_ref = (struct gsm48_req_ref *) &rqd_hdr->data[1];
|
|
|
|
/* parse access delay and use as TA */
|
|
if (rqd_hdr->data[sizeof(struct gsm48_req_ref)+1] != RSL_IE_ACCESS_DELAY)
|
|
return -EINVAL;
|
|
rqd_ta = rqd_hdr->data[sizeof(struct gsm48_req_ref)+2];
|
|
|
|
/* determine channel type (SDCCH/TCH_F/TCH_H) based on
|
|
* request reference RA */
|
|
lctype = get_ctype_by_chreq(bts, rqd_ref->ra, bts->network->neci);
|
|
chreq_reason = get_reason_by_chreq(bts, rqd_ref->ra, bts->network->neci);
|
|
|
|
counter_inc(bts->network->stats.chreq.total);
|
|
|
|
/* check availability / allocate channel */
|
|
lchan = lchan_alloc(bts, lctype);
|
|
if (!lchan) {
|
|
LOGP(DRSL, LOGL_NOTICE, "BTS %d CHAN RQD: no resources for %s 0x%x\n",
|
|
msg->lchan->ts->trx->bts->nr, gsm_lchant_name(lctype), rqd_ref->ra);
|
|
counter_inc(bts->network->stats.chreq.no_channel);
|
|
/* FIXME: send some kind of reject ?!? */
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (lchan->state != LCHAN_S_NONE)
|
|
LOGP(DRSL, LOGL_NOTICE, "%s lchan_alloc() returned channel "
|
|
"in state %s\n", gsm_lchan_name(lchan),
|
|
gsm_lchans_name(lchan->state));
|
|
lchan->state = LCHAN_S_ACT_REQ;
|
|
|
|
ts_number = lchan->ts->nr;
|
|
arfcn = lchan->ts->trx->arfcn;
|
|
subch = lchan->nr;
|
|
|
|
lchan->encr.alg_id = RSL_ENC_ALG_A5(0); /* no encryption */
|
|
lchan->ms_power = ms_pwr_ctl_lvl(bts->band, bts->ms_max_power);
|
|
lchan->bs_power = 0; /* 0dB reduction, output power = Pn */
|
|
lchan->rsl_cmode = RSL_CMOD_SPD_SIGN;
|
|
lchan->tch_mode = GSM48_CMODE_SIGN;
|
|
rsl_chan_activate_lchan(lchan, 0x00, rqd_ta, 0);
|
|
|
|
/* create IMMEDIATE ASSIGN 04.08 messge */
|
|
memset(&ia, 0, sizeof(ia));
|
|
ia.l2_plen = 0x2d;
|
|
ia.proto_discr = GSM48_PDISC_RR;
|
|
ia.msg_type = GSM48_MT_RR_IMM_ASS;
|
|
ia.page_mode = GSM48_PM_SAME;
|
|
ia.chan_desc.chan_nr = lchan2chan_nr(lchan);
|
|
ia.chan_desc.h0.h = 0;
|
|
ia.chan_desc.h0.arfcn_high = arfcn >> 8;
|
|
ia.chan_desc.h0.arfcn_low = arfcn & 0xff;
|
|
ia.chan_desc.h0.tsc = bts->tsc;
|
|
/* use request reference extracted from CHAN_RQD */
|
|
memcpy(&ia.req_ref, rqd_ref, sizeof(ia.req_ref));
|
|
ia.timing_advance = rqd_ta;
|
|
ia.mob_alloc_len = 0;
|
|
|
|
DEBUGP(DRSL, "%s Activating ARFCN(%u) SS(%u) lctype %s "
|
|
"r=%s ra=0x%02x\n", gsm_lchan_name(lchan), arfcn, subch,
|
|
gsm_lchant_name(lchan->type), gsm_chreq_name(chreq_reason),
|
|
rqd_ref->ra);
|
|
|
|
/* Start timer T3101 to wait for GSM48_MT_RR_PAG_RESP */
|
|
lchan->T3101.cb = t3101_expired;
|
|
lchan->T3101.data = lchan;
|
|
bsc_schedule_timer(&lchan->T3101, bts->network->T3101, 0);
|
|
|
|
/* send IMMEDIATE ASSIGN CMD on RSL to BTS (to send on CCCH to MS) */
|
|
ret = rsl_imm_assign_cmd(bts, sizeof(ia), (u_int8_t *) &ia);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* MS has requested a channel on the RACH */
|
|
static int rsl_rx_ccch_load(struct msgb *msg)
|
|
{
|
|
struct abis_rsl_dchan_hdr *rslh = msgb_l2(msg);
|
|
u_int16_t pg_buf_space;
|
|
u_int16_t rach_slot_count = -1;
|
|
u_int16_t rach_busy_count = -1;
|
|
u_int16_t rach_access_count = -1;
|
|
|
|
switch (rslh->data[0]) {
|
|
case RSL_IE_PAGING_LOAD:
|
|
pg_buf_space = rslh->data[1] << 8 | rslh->data[2];
|
|
paging_update_buffer_space(msg->trx->bts, pg_buf_space);
|
|
break;
|
|
case RSL_IE_RACH_LOAD:
|
|
if (msg->data_len >= 7) {
|
|
rach_slot_count = rslh->data[2] << 8 | rslh->data[3];
|
|
rach_busy_count = rslh->data[4] << 8 | rslh->data[5];
|
|
rach_access_count = rslh->data[6] << 8 | rslh->data[7];
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int abis_rsl_rx_cchan(struct msgb *msg)
|
|
{
|
|
struct abis_rsl_dchan_hdr *rslh = msgb_l2(msg);
|
|
int rc = 0;
|
|
|
|
msg->lchan = lchan_lookup(msg->trx, rslh->chan_nr);
|
|
|
|
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 */
|
|
case RSL_MT_CBCH_LOAD_IND:
|
|
/* current load on the CBCH */
|
|
LOGP(DRSL, LOGL_NOTICE, "Unimplemented Abis RSL TRX message "
|
|
"type 0x%02x\n", rslh->c.msg_type);
|
|
break;
|
|
default:
|
|
LOGP(DRSL, LOGL_NOTICE, "Unknown Abis RSL TRX message type "
|
|
"0x%02x\n", rslh->c.msg_type);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int rsl_rx_rll_err_ind(struct msgb *msg)
|
|
{
|
|
struct abis_rsl_rll_hdr *rllh = msgb_l2(msg);
|
|
u_int8_t *rlm_cause = rllh->data;
|
|
|
|
LOGP(DRLL, LOGL_ERROR, "%s ERROR INDICATION cause=%s\n",
|
|
gsm_lchan_name(msg->lchan),
|
|
get_value_string(rsl_rlm_cause_strs, rlm_cause[1]));
|
|
|
|
rll_indication(msg->lchan, rllh->link_id, BSC_RLLR_IND_ERR_IND);
|
|
|
|
if (rlm_cause[1] == RLL_CAUSE_T200_EXPIRED)
|
|
return rsl_rf_chan_release(msg->lchan);
|
|
|
|
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 abis_rsl_rll_hdr *rllh = msgb_l2(msg);
|
|
int rc = 0;
|
|
char *ts_name;
|
|
u_int8_t sapi = rllh->link_id & 7;
|
|
|
|
msg->lchan = lchan_lookup(msg->trx, rllh->chan_nr);
|
|
ts_name = gsm_lchan_name(msg->lchan);
|
|
DEBUGP(DRLL, "%s SAPI=%u ", ts_name, sapi);
|
|
|
|
switch (rllh->c.msg_type) {
|
|
case RSL_MT_DATA_IND:
|
|
DEBUGPC(DRLL, "DATA INDICATION\n");
|
|
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:
|
|
DEBUGPC(DRLL, "ESTABLISH INDICATION\n");
|
|
/* lchan is established, stop T3101 */
|
|
msg->lchan->sapis[rllh->link_id & 0x7] = LCHAN_SAPI_MS;
|
|
bsc_del_timer(&msg->lchan->T3101);
|
|
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:
|
|
DEBUGPC(DRLL, "ESTABLISH CONFIRM\n");
|
|
msg->lchan->sapis[rllh->link_id & 0x7] = 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 */
|
|
DEBUGPC(DRLL, "RELEASE INDICATION\n");
|
|
msg->lchan->sapis[rllh->link_id & 0x7] = LCHAN_SAPI_UNUSED;
|
|
rll_indication(msg->lchan, rllh->link_id,
|
|
BSC_RLLR_IND_REL_IND);
|
|
/* we can now releae the channel on the BTS/Abis side */
|
|
/* FIXME: officially we need to start T3111 and wait for
|
|
* some grace period */
|
|
rsl_rf_chan_release(msg->lchan);
|
|
break;
|
|
case RSL_MT_REL_CONF:
|
|
/* BTS informs us of having received UA from MS,
|
|
* in response to DISC that we've sent earlier */
|
|
DEBUGPC(DRLL, "RELEASE CONFIRMATION\n");
|
|
msg->lchan->sapis[rllh->link_id & 0x7] = LCHAN_SAPI_UNUSED;
|
|
/* we can now releae the channel on the BTS/Abis side */
|
|
/* FIXME: officially we need to start T3111 and wait for
|
|
* some grace period */
|
|
rsl_rf_chan_release(msg->lchan);
|
|
break;
|
|
case RSL_MT_ERROR_IND:
|
|
rc = rsl_rx_rll_err_ind(msg);
|
|
break;
|
|
case RSL_MT_UNIT_DATA_IND:
|
|
LOGP(DRLL, LOGL_NOTICE, "unimplemented Abis RLL message "
|
|
"type 0x%02x\n", rllh->c.msg_type);
|
|
break;
|
|
default:
|
|
LOGP(DRLL, LOGL_NOTICE, "unknown Abis RLL message "
|
|
"type 0x%02x\n", rllh->c.msg_type);
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
static u_int8_t ipa_smod_s_for_lchan(struct gsm_lchan *lchan)
|
|
{
|
|
switch (lchan->tch_mode) {
|
|
case GSM48_CMODE_SPEECH_V1:
|
|
switch (lchan->type) {
|
|
case GSM_LCHAN_TCH_F:
|
|
return 0x00;
|
|
case GSM_LCHAN_TCH_H:
|
|
return 0x03;
|
|
default:
|
|
break;
|
|
}
|
|
case GSM48_CMODE_SPEECH_EFR:
|
|
switch (lchan->type) {
|
|
case GSM_LCHAN_TCH_F:
|
|
return 0x01;
|
|
/* there's no half-rate EFR */
|
|
default:
|
|
break;
|
|
}
|
|
case GSM48_CMODE_SPEECH_AMR:
|
|
switch (lchan->type) {
|
|
case GSM_LCHAN_TCH_F:
|
|
return 0x02;
|
|
case GSM_LCHAN_TCH_H:
|
|
return 0x05;
|
|
default:
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
LOGP(DRSL, LOGL_ERROR, "Cannot determine ip.access speech mode for "
|
|
"tch_mode == 0x%02x\n", lchan->tch_mode);
|
|
return 0;
|
|
}
|
|
|
|
/* ip.access specific RSL extensions */
|
|
static void ipac_parse_rtp(struct gsm_lchan *lchan, struct tlv_parsed *tv)
|
|
{
|
|
struct in_addr ip;
|
|
u_int16_t port, conn_id;
|
|
|
|
if (TLVP_PRESENT(tv, RSL_IE_IPAC_LOCAL_IP)) {
|
|
ip.s_addr = *((u_int32_t *) TLVP_VAL(tv, RSL_IE_IPAC_LOCAL_IP));
|
|
DEBUGPC(DRSL, "LOCAL_IP=%s ", inet_ntoa(ip));
|
|
lchan->abis_ip.bound_ip = ntohl(ip.s_addr);
|
|
}
|
|
|
|
if (TLVP_PRESENT(tv, RSL_IE_IPAC_LOCAL_PORT)) {
|
|
port = *((u_int16_t *) TLVP_VAL(tv, RSL_IE_IPAC_LOCAL_PORT));
|
|
port = ntohs(port);
|
|
DEBUGPC(DRSL, "LOCAL_PORT=%u ", port);
|
|
lchan->abis_ip.bound_port = port;
|
|
}
|
|
|
|
if (TLVP_PRESENT(tv, RSL_IE_IPAC_CONN_ID)) {
|
|
conn_id = *((u_int16_t *) TLVP_VAL(tv, RSL_IE_IPAC_CONN_ID));
|
|
conn_id = ntohs(conn_id);
|
|
DEBUGPC(DRSL, "CON_ID=%u ", 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);
|
|
DEBUGPC(DRSL, "RTP_PAYLOAD2=0x%02x ",
|
|
lchan->abis_ip.rtp_payload2);
|
|
}
|
|
|
|
if (TLVP_PRESENT(tv, RSL_IE_IPAC_SPEECH_MODE)) {
|
|
lchan->abis_ip.speech_mode =
|
|
*TLVP_VAL(tv, RSL_IE_IPAC_SPEECH_MODE);
|
|
DEBUGPC(DRSL, "speech_mode=0x%02x ",
|
|
lchan->abis_ip.speech_mode);
|
|
}
|
|
|
|
if (TLVP_PRESENT(tv, RSL_IE_IPAC_REMOTE_IP)) {
|
|
ip.s_addr = *((u_int32_t *) TLVP_VAL(tv, RSL_IE_IPAC_REMOTE_IP));
|
|
DEBUGPC(DRSL, "REMOTE_IP=%s ", inet_ntoa(ip));
|
|
lchan->abis_ip.connect_ip = ntohl(ip.s_addr);
|
|
}
|
|
|
|
if (TLVP_PRESENT(tv, RSL_IE_IPAC_REMOTE_PORT)) {
|
|
port = *((u_int16_t *) TLVP_VAL(tv, RSL_IE_IPAC_REMOTE_PORT));
|
|
port = ntohs(port);
|
|
DEBUGPC(DRSL, "REMOTE_PORT=%u ", port);
|
|
lchan->abis_ip.connect_port = port;
|
|
}
|
|
}
|
|
|
|
int rsl_ipacc_crcx(struct gsm_lchan *lchan)
|
|
{
|
|
struct msgb *msg = rsl_msgb_alloc();
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
|
|
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 = lchan2chan_nr(lchan);
|
|
|
|
/* 0x1- == receive-only, 0x-1 == EFR codec */
|
|
lchan->abis_ip.speech_mode = 0x10 | ipa_smod_s_for_lchan(lchan);
|
|
msgb_tv_put(msg, RSL_IE_IPAC_SPEECH_MODE, lchan->abis_ip.speech_mode);
|
|
|
|
DEBUGP(DRSL, "%s IPAC_BIND speech_mode=0x%02x\n",
|
|
gsm_lchan_name(lchan), lchan->abis_ip.speech_mode);
|
|
|
|
msg->trx = lchan->ts->trx;
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
int rsl_ipacc_mdcx(struct gsm_lchan *lchan, u_int32_t ip, u_int16_t port,
|
|
u_int8_t rtp_payload2)
|
|
{
|
|
struct msgb *msg = rsl_msgb_alloc();
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
u_int32_t *att_ip;
|
|
struct in_addr ia;
|
|
|
|
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 = lchan2chan_nr(lchan);
|
|
|
|
/* we need to store these now as MDCX_ACK does not return them :( */
|
|
lchan->abis_ip.rtp_payload2 = rtp_payload2;
|
|
lchan->abis_ip.connect_port = port;
|
|
lchan->abis_ip.connect_ip = ip;
|
|
|
|
/* 0x0- == both directions, 0x-1 == EFR codec */
|
|
lchan->abis_ip.speech_mode = 0x00 | ipa_smod_s_for_lchan(lchan);
|
|
|
|
ia.s_addr = htonl(ip);
|
|
DEBUGP(DRSL, "%s IPAC_MDCX IP=%s PORT=%d RTP_PAYLOAD2=%d CONN_ID=%d "
|
|
"speech_mode=0x%02x\n", gsm_lchan_name(lchan), inet_ntoa(ia), port,
|
|
rtp_payload2, lchan->abis_ip.conn_id, lchan->abis_ip.speech_mode);
|
|
|
|
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 = (u_int32_t *) msgb_put(msg, sizeof(ip));
|
|
*att_ip = ia.s_addr;
|
|
msgb_tv16_put(msg, RSL_IE_IPAC_REMOTE_PORT, port);
|
|
msgb_tv_put(msg, RSL_IE_IPAC_SPEECH_MODE, lchan->abis_ip.speech_mode);
|
|
if (rtp_payload2)
|
|
msgb_tv_put(msg, RSL_IE_IPAC_RTP_PAYLOAD2, rtp_payload2);
|
|
|
|
msg->trx = lchan->ts->trx;
|
|
|
|
return abis_rsl_sendmsg(msg);
|
|
}
|
|
|
|
/* tell BTS to connect RTP stream to our local RTP socket */
|
|
int rsl_ipacc_mdcx_to_rtpsock(struct gsm_lchan *lchan)
|
|
{
|
|
struct rtp_socket *rs = lchan->abis_ip.rtp_socket;
|
|
int rc;
|
|
|
|
rc = rsl_ipacc_mdcx(lchan, ntohl(rs->rtp.sin_local.sin_addr.s_addr),
|
|
ntohs(rs->rtp.sin_local.sin_port),
|
|
/* FIXME: use RTP payload of bound socket, not BTS*/
|
|
lchan->abis_ip.rtp_payload2);
|
|
|
|
return rc;
|
|
}
|
|
|
|
int rsl_ipacc_pdch_activate(struct gsm_lchan *lchan)
|
|
{
|
|
struct msgb *msg = rsl_msgb_alloc();
|
|
struct abis_rsl_dchan_hdr *dh;
|
|
|
|
dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
|
|
init_dchan_hdr(dh, RSL_MT_IPAC_PDCH_ACT);
|
|
dh->c.msg_discr = ABIS_RSL_MDISC_DED_CHAN;
|
|
dh->chan_nr = lchan2chan_nr(lchan);
|
|
|
|
DEBUGP(DRSL, "%s IPAC_PDCH_ACT\n", gsm_lchan_name(lchan));
|
|
|
|
msg->trx = lchan->ts->trx;
|
|
|
|
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;
|
|
|
|
/* 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");
|
|
return -EINVAL;
|
|
}
|
|
|
|
ipac_parse_rtp(lchan, &tv);
|
|
|
|
/* in case we don't use direct BTS-to-BTS RTP */
|
|
if (!ipacc_rtp_direct) {
|
|
int rc;
|
|
/* the BTS has successfully bound a TCH to a local ip/port,
|
|
* which means we can connect our UDP socket to it */
|
|
if (lchan->abis_ip.rtp_socket) {
|
|
rtp_socket_free(lchan->abis_ip.rtp_socket);
|
|
lchan->abis_ip.rtp_socket = NULL;
|
|
}
|
|
|
|
lchan->abis_ip.rtp_socket = rtp_socket_create();
|
|
if (!lchan->abis_ip.rtp_socket)
|
|
goto out_err;
|
|
|
|
rc = rtp_socket_connect(lchan->abis_ip.rtp_socket,
|
|
lchan->abis_ip.bound_ip,
|
|
lchan->abis_ip.bound_port);
|
|
if (rc < 0)
|
|
goto out_err;
|
|
}
|
|
|
|
dispatch_signal(SS_ABISIP, S_ABISIP_CRCX_ACK, msg->lchan);
|
|
|
|
return 0;
|
|
out_err:
|
|
return -EIO;
|
|
}
|
|
|
|
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;
|
|
|
|
/* 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);
|
|
dispatch_signal(SS_ABISIP, S_ABISIP_MDCX_ACK, msg->lchan);
|
|
|
|
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;
|
|
struct gsm_lchan *lchan = msg->lchan;
|
|
|
|
rsl_tlv_parse(&tv, dh->data, msgb_l2len(msg)-sizeof(*dh));
|
|
|
|
if (TLVP_PRESENT(&tv, RSL_IE_CAUSE))
|
|
print_rsl_cause(LOGL_DEBUG, TLVP_VAL(&tv, RSL_IE_CAUSE),
|
|
TLVP_LEN(&tv, RSL_IE_CAUSE));
|
|
|
|
/* the BTS tells us a RTP stream has been disconnected */
|
|
if (lchan->abis_ip.rtp_socket) {
|
|
rtp_socket_free(lchan->abis_ip.rtp_socket);
|
|
lchan->abis_ip.rtp_socket = NULL;
|
|
}
|
|
|
|
dispatch_signal(SS_ABISIP, S_ABISIP_DLCX_IND, msg->lchan);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int abis_rsl_rx_ipacc(struct msgb *msg)
|
|
{
|
|
struct abis_rsl_rll_hdr *rllh = msgb_l2(msg);
|
|
char *ts_name;
|
|
int rc = 0;
|
|
|
|
msg->lchan = lchan_lookup(msg->trx, rllh->chan_nr);
|
|
ts_name = gsm_lchan_name(msg->lchan);
|
|
|
|
switch (rllh->c.msg_type) {
|
|
case RSL_MT_IPAC_CRCX_ACK:
|
|
DEBUGP(DRSL, "%s IPAC_CRCX_ACK ", ts_name);
|
|
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?!? */
|
|
LOGP(DRSL, LOGL_ERROR, "%s IPAC_CRCX_NACK\n", ts_name);
|
|
break;
|
|
case RSL_MT_IPAC_MDCX_ACK:
|
|
/* the BTS tells us that a connect operation was successful */
|
|
DEBUGP(DRSL, "%s IPAC_MDCX_ACK ", ts_name);
|
|
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 */
|
|
LOGP(DRSL, LOGL_ERROR, "%s IPAC_MDCX_NACK\n", ts_name);
|
|
break;
|
|
case RSL_MT_IPAC_DLCX_IND:
|
|
DEBUGP(DRSL, "%s IPAC_DLCX_IND ", ts_name);
|
|
rc = abis_rsl_rx_ipacc_dlcx_ind(msg);
|
|
break;
|
|
default:
|
|
LOGP(DRSL, LOGL_NOTICE, "Unknown ip.access msg_type 0x%02x\n",
|
|
rllh->c.msg_type);
|
|
break;
|
|
}
|
|
DEBUGPC(DRSL, "\n");
|
|
|
|
return rc;
|
|
}
|
|
|
|
|
|
/* Entry-point where L2 RSL from BTS enters */
|
|
int abis_rsl_rcvmsg(struct msgb *msg)
|
|
{
|
|
struct abis_rsl_common_hdr *rslh = msgb_l2(msg) ;
|
|
int rc = 0;
|
|
|
|
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);
|
|
return -EINVAL;
|
|
}
|
|
msgb_free(msg);
|
|
return rc;
|
|
}
|
|
|
|
/* From Table 10.5.33 of GSM 04.08 */
|
|
int rsl_number_of_paging_subchannels(struct gsm_bts *bts)
|
|
{
|
|
if (bts->si_common.chan_desc.ccch_conf == RSL_BCCH_CCCH_CONF_1_C) {
|
|
return MAX(1, (3 - bts->si_common.chan_desc.bs_ag_blks_res))
|
|
* (bts->si_common.chan_desc.bs_pa_mfrms + 2);
|
|
} else {
|
|
return (9 - bts->si_common.chan_desc.bs_ag_blks_res)
|
|
* (bts->si_common.chan_desc.bs_pa_mfrms + 2);
|
|
}
|
|
}
|