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osmocom-bb/src/host/layer23/src/misc/cell_log.c

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/* Cell Scanning code for OsmocomBB */
/* (C) 2010 by Andreas Eversberg <jolly@eversberg.eu>
*
* 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.
*
*/
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <errno.h>
#include <l1ctl_proto.h>
#include <osmocom/core/logging.h>
#include <osmocom/core/timer.h>
#include <osmocom/core/signal.h>
#include <osmocom/core/msgb.h>
#include <osmocom/gsm/gsm_utils.h>
#include <osmocom/gsm/protocol/gsm_04_08.h>
#include <osmocom/gsm/rsl.h>
#include <osmocom/bb/common/l1ctl.h>
#include <osmocom/bb/common/osmocom_data.h>
#include <osmocom/bb/common/logging.h>
#include <osmocom/bb/common/networks.h>
#include <osmocom/bb/common/gps.h>
#include <osmocom/bb/misc/cell_log.h>
#include <osmocom/bb/misc/geo.h>
#define READ_WAIT 2, 0
#define RACH_WAIT 0, 900000
#define MIN_RXLEV_DBM -106
#define MAX_DIST 2000
enum {
SCAN_STATE_PM,
SCAN_STATE_SYNC,
SCAN_STATE_READ,
SCAN_STATE_RACH,
};
/* ranges of bands */
static uint16_t basic_band_range[][2] = {{0, 124}, {512, 885}, {955, 1023}, {0, 0}};
uint16_t (*band_range)[][2] = &basic_band_range;
#define INFO_FLG_PM 1
#define INFO_FLG_SYNC 2
#define INFO_FLG_SI1 4
#define INFO_FLG_SI2 8
#define INFO_FLG_SI2bis 16
#define INFO_FLG_SI2ter 32
#define INFO_FLG_SI3 64
#define INFO_FLG_SI4 128
static struct osmocom_ms *ms;
static struct osmo_timer_list timer;
static struct pm_info {
uint16_t flags;
int8_t rxlev_dbm;
} pm[1024];
static int started = 0;
static int state;
static int8_t min_rxlev_dbm = MIN_RXLEV_DBM;
static int sync_count;
static int pm_index, pm_gps_valid;
static double pm_gps_x, pm_gps_y, pm_gps_z;
static int arfcn;
static int rach_count;
static FILE *logfp = NULL;
extern char *logname;
extern int RACH_MAX;
static struct gsm48_sysinfo sysinfo;
static struct log_si {
uint16_t flags;
uint8_t bsic;
int8_t rxlev_dbm;
uint16_t mcc, mnc, lac, cellid;
uint8_t ta;
double latitude, longitude;
} log_si;
struct rach_ref {
uint8_t valid;
uint8_t cr;
uint8_t t1, t2, t3;
} rach_ref;
#define LOGFILE(fmt, args...) \
fprintf(logfp, fmt, ## args);
#define LOGFLUSH() \
fflush(logfp);
static void start_sync(void);
static void start_rach(void);
static void start_pm(void);
static void log_gps(void)
{
if (!g.enable || !g.valid)
return;
LOGFILE("position %.8f %.8f\n", g.longitude, g.latitude);
}
static void log_time(void)
{
time_t now;
if (g.enable && g.valid)
now = g.gmt;
else
time(&now);
LOGFILE("time %lu\n", now);
}
static void log_frame(char *tag, uint8_t *data)
{
int i;
LOGFILE("%s", tag);
for (i = 0; i < 23; i++)
LOGFILE(" %02x", *data++);
LOGFILE("\n");
}
static void log_pm(void)
{
int count = 0, i;
LOGFILE("[power]\n");
log_time();
log_gps();
for (i = 0; i <= 1023; i++) {
if ((pm[i].flags & INFO_FLG_PM)) {
if (!count)
LOGFILE("arfcn %d", i);
LOGFILE(" %d", pm[i].rxlev_dbm);
count++;
if (count == 12) {
LOGFILE("\n");
count = 0;
}
} else {
if (count) {
LOGFILE("\n");
count = 0;
}
}
}
if (count)
LOGFILE("\n");
LOGFILE("\n");
LOGFLUSH();
}
static void log_sysinfo(void)
{
struct rx_meas_stat *meas = &ms->meas;
struct gsm48_sysinfo *s = &sysinfo;
int8_t rxlev_dbm;
char ta_str[32] = "";
if (log_si.ta != 0xff)
sprintf(ta_str, " TA=%d", log_si.ta);
LOGP(DSUM, LOGL_INFO, "Cell: ARFCN=%d MCC=%s MNC=%s (%s, %s)%s\n",
arfcn, gsm_print_mcc(s->mcc), gsm_print_mnc(s->mnc),
gsm_get_mcc(s->mcc), gsm_get_mnc(s->mcc, s->mnc), ta_str);
LOGFILE("[sysinfo]\n");
LOGFILE("arfcn %d\n", s->arfcn);
log_time();
log_gps();
LOGFILE("bsic %d,%d\n", s->bsic >> 3, s->bsic & 7);
rxlev_dbm = meas->rxlev / meas->frames - 110;
LOGFILE("rxlev %d\n", rxlev_dbm);
if (s->si1)
log_frame("si1", s->si1_msg);
if (s->si2)
log_frame("si2", s->si2_msg);
if (s->si2bis)
log_frame("si2bis", s->si2b_msg);
if (s->si2ter)
log_frame("si2ter", s->si2t_msg);
if (s->si3)
log_frame("si3", s->si3_msg);
if (s->si4)
log_frame("si4", s->si4_msg);
if (log_si.ta != 0xff)
LOGFILE("ta %d\n", log_si.ta);
LOGFILE("\n");
LOGFLUSH();
}
static void timeout_cb(void *arg)
{
switch (state) {
case SCAN_STATE_READ:
LOGP(DRR, LOGL_INFO, "Timeout reading BCCH\n");
start_sync();
break;
case SCAN_STATE_RACH:
LOGP(DRR, LOGL_INFO, "Timeout on RACH\n");
rach_count++;
start_rach();
break;
}
}
static void stop_timer(void)
{
if (osmo_timer_pending(&timer))
osmo_timer_del(&timer);
}
static void start_timer(int sec, int micro)
{
stop_timer();
timer.cb = timeout_cb;
timer.data = ms;
osmo_timer_schedule(&timer, sec, micro);
}
static void start_rach(void)
{
struct gsm48_sysinfo *s = &sysinfo;
uint8_t chan_req_val, chan_req_mask;
struct msgb *nmsg;
struct abis_rsl_cchan_hdr *ncch;
if (rach_count == RACH_MAX) {
log_sysinfo();
start_sync();
return;
}
state = SCAN_STATE_RACH;
if (s->neci) {
chan_req_mask = 0x0f;
chan_req_val = 0x01;
LOGP(DRR, LOGL_INFO, "CHANNEL REQUEST: %02x "
"(OTHER with NECI)\n", chan_req_val);
} else {
chan_req_mask = 0x1f;
chan_req_val = 0xe0;
LOGP(DRR, LOGL_INFO, "CHANNEL REQUEST: %02x (OTHER no NECI)\n",
chan_req_val);
}
rach_ref.valid = 0;
rach_ref.cr = random();
rach_ref.cr &= chan_req_mask;
rach_ref.cr |= chan_req_val;
nmsg = msgb_alloc_headroom(RSL_ALLOC_SIZE+RSL_ALLOC_HEADROOM,
RSL_ALLOC_HEADROOM, "GSM 04.06 RSL");
if (!nmsg)
return;
nmsg->l2h = nmsg->data;
ncch = (struct abis_rsl_cchan_hdr *) msgb_put(nmsg, sizeof(*ncch)
+ 4 + 2 + 2);
rsl_init_cchan_hdr(ncch, RSL_MT_CHAN_RQD);
ncch->chan_nr = RSL_CHAN_RACH;
ncch->data[0] = RSL_IE_REQ_REFERENCE;
ncch->data[1] = rach_ref.cr;
ncch->data[2] = (s->ccch_conf == 1) << 7;
ncch->data[3] = 0;
ncch->data[4] = RSL_IE_ACCESS_DELAY;
ncch->data[5] = 0; /* no delay */
ncch->data[6] = RSL_IE_MS_POWER;
ncch->data[7] = 0; /* full power */
start_timer(RACH_WAIT);
lapdm_rslms_recvmsg(nmsg, &ms->lapdm_channel);
}
static void start_sync(void)
{
int rxlev_dbm = -128;
int i, dist = 0;
char dist_str[32] = "";
arfcn = 0xffff;
for (i = 0; i <= 1023; i++) {
if ((pm[i].flags & INFO_FLG_PM)
&& !(pm[i].flags & INFO_FLG_SYNC)) {
if (pm[i].rxlev_dbm > rxlev_dbm) {
rxlev_dbm = pm[i].rxlev_dbm;
arfcn = i;
}
}
}
/* if GPS becomes valid, like after exitting a tunnel */
if (!pm_gps_valid && g.valid) {
pm_gps_valid = 1;
geo2space(&pm_gps_x, &pm_gps_y, &pm_gps_z, g.longitude,
g.latitude);
}
if (pm_gps_valid && g.valid) {
double x, y, z;
geo2space(&x, &y, &z, g.longitude, g.latitude);
dist = distinspace(pm_gps_x, pm_gps_y, pm_gps_z, x, y, z);
sprintf(dist_str, " dist %d", (int)dist);
}
if (dist > MAX_DIST || arfcn == 0xffff || rxlev_dbm < min_rxlev_dbm) {
memset(pm, 0, sizeof(pm));
pm_index = 0;
sync_count = 0;
start_pm();
return;
}
pm[arfcn].flags |= INFO_FLG_SYNC;
LOGP(DSUM, LOGL_INFO, "Sync ARFCN %d (rxlev %d, %d syncs left)%s\n",
arfcn, pm[arfcn].rxlev_dbm, sync_count--, dist_str);
memset(&sysinfo, 0, sizeof(sysinfo));
sysinfo.arfcn = arfcn;
state = SCAN_STATE_SYNC;
l1ctl_tx_reset_req(ms, L1CTL_RES_T_FULL);
l1ctl_tx_fbsb_req(ms, arfcn, L1CTL_FBSB_F_FB01SB, 100, 0,
CCCH_MODE_NONE, dbm2rxlev(pm[arfcn].rxlev_dbm));
}
static void start_pm(void)
{
uint16_t from, to;
state = SCAN_STATE_PM;
from = (*band_range)[pm_index][0];
to = (*band_range)[pm_index][1];
if (from == 0 && to == 0) {
LOGP(DSUM, LOGL_INFO, "Measurement done\n");
pm_gps_valid = g.enable && g.valid;
if (pm_gps_valid)
geo2space(&pm_gps_x, &pm_gps_y, &pm_gps_z,
g.longitude, g.latitude);
log_pm();
start_sync();
return;
}
LOGP(DSUM, LOGL_INFO, "Measure from %d to %d\n", from, to);
l1ctl_tx_reset_req(ms, L1CTL_RES_T_FULL);
l1ctl_tx_pm_req_range(ms, from, to);
}
static int signal_cb(unsigned int subsys, unsigned int signal,
void *handler_data, void *signal_data)
{
struct osmobb_meas_res *mr;
struct osmobb_fbsb_res *fr;
uint16_t index;
if (subsys != SS_L1CTL)
return 0;
switch (signal) {
case S_L1CTL_PM_RES:
mr = signal_data;
index = mr->band_arfcn & 0x3ff;
pm[index].flags |= INFO_FLG_PM;
pm[index].rxlev_dbm = mr->rx_lev - 110;
if (pm[index].rxlev_dbm >= min_rxlev_dbm)
sync_count++;
// printf("rxlev %d = %d (sync_count %d)\n", index, pm[index].rxlev_dbm, sync_count);
break;
case S_L1CTL_PM_DONE:
pm_index++;
start_pm();
break;
case S_L1CTL_FBSB_RESP:
fr = signal_data;
sysinfo.bsic = fr->bsic;
state = SCAN_STATE_READ;
memset(&ms->meas, 0, sizeof(ms->meas));
memset(&log_si, 0, sizeof(log_si));
log_si.flags |= INFO_FLG_SYNC;
log_si.ta = 0xff; /* invalid */
start_timer(READ_WAIT);
LOGP(DRR, LOGL_INFO, "Synchronized, start reading\n");
break;
case S_L1CTL_FBSB_ERR:
LOGP(DRR, LOGL_INFO, "Sync failed\n");
start_sync();
break;
case S_L1CTL_RESET:
if (started)
break;
started = 1;
memset(pm, 0, sizeof(pm));
pm_index = 0;
sync_count = 0;
start_pm();
}
return 0;
}
static int ta_result(uint8_t ta)
{
stop_timer();
if (ta == 0xff)
LOGP(DSUM, LOGL_INFO, "Got assignment reject\n");
else {
LOGP(DSUM, LOGL_DEBUG, "Got assignment TA = %d\n", ta);
log_si.ta = ta;
}
log_sysinfo();
start_sync();
return 0;
}
/* match request reference against request */
static int match_ra(struct osmocom_ms *ms, struct gsm48_req_ref *ref)
{
uint8_t ia_t1, ia_t2, ia_t3;
/* filter confirmed RACH requests only */
if (rach_ref.valid && ref->ra == rach_ref.cr) {
ia_t1 = ref->t1;
ia_t2 = ref->t2;
ia_t3 = (ref->t3_high << 3) | ref->t3_low;
if (ia_t1 == rach_ref.t1 && ia_t2 == rach_ref.t2
&& ia_t3 == rach_ref.t3) {
LOGP(DRR, LOGL_INFO, "request %02x matches "
"(fn=%d,%d,%d)\n", ref->ra, ia_t1, ia_t2,
ia_t3);
return 1;
} else
LOGP(DRR, LOGL_INFO, "request %02x matches but not "
"frame number (IMM.ASS fn=%d,%d,%d != RACH "
"fn=%d,%d,%d)\n", ref->ra, ia_t1, ia_t2, ia_t3,
rach_ref.t1, rach_ref.t2, rach_ref.t3);
}
return 0;
}
/* 9.1.18 IMMEDIATE ASSIGNMENT is received */
static int imm_ass(struct osmocom_ms *ms, struct msgb *msg)
{
struct gsm48_imm_ass *ia = msgb_l3(msg);
LOGP(DRR, LOGL_INFO, "IMMEDIATE ASSIGNMENT:\n");
if (state != SCAN_STATE_RACH) {
LOGP(DRR, LOGL_INFO, "Not for us, no request.\n");
return 0;
}
/* request ref */
if (match_ra(ms, &ia->req_ref)) {
return ta_result(ia->timing_advance);
}
LOGP(DRR, LOGL_INFO, "Request, but not for us.\n");
return 0;
}
/* 9.1.19 IMMEDIATE ASSIGNMENT EXTENDED is received */
static int imm_ass_ext(struct osmocom_ms *ms, struct msgb *msg)
{
struct gsm48_imm_ass_ext *ia = msgb_l3(msg);
LOGP(DRR, LOGL_INFO, "IMMEDIATE ASSIGNMENT EXTENDED:\n");
if (state != SCAN_STATE_RACH) {
LOGP(DRR, LOGL_INFO, "Not for us, no request.\n");
return 0;
}
/* request ref 1 */
if (match_ra(ms, &ia->req_ref1)) {
return ta_result(ia->timing_advance1);
}
/* request ref 2 */
if (match_ra(ms, &ia->req_ref2)) {
return ta_result(ia->timing_advance2);
}
LOGP(DRR, LOGL_INFO, "Request, but not for us.\n");
return 0;
}
/* 9.1.20 IMMEDIATE ASSIGNMENT REJECT is received */
static int imm_ass_rej(struct osmocom_ms *ms, struct msgb *msg)
{
struct gsm48_imm_ass_rej *ia = msgb_l3(msg);
int i;
struct gsm48_req_ref *req_ref;
LOGP(DRR, LOGL_INFO, "IMMEDIATE ASSIGNMENT REJECT:\n");
if (state != SCAN_STATE_RACH) {
LOGP(DRR, LOGL_INFO, "Not for us, no request.\n");
return 0;
}
for (i = 0; i < 4; i++) {
/* request reference */
req_ref = (struct gsm48_req_ref *)
(((uint8_t *)&ia->req_ref1) + i * 4);
LOGP(DRR, LOGL_INFO, "IMMEDIATE ASSIGNMENT REJECT "
"(ref 0x%02x)\n", req_ref->ra);
if (match_ra(ms, req_ref)) {
return ta_result(0xff);
}
}
return 0;
}
/* receive CCCH at RR layer */
static int pch_agch(struct osmocom_ms *ms, struct msgb *msg)
{
struct gsm48_system_information_type_header *sih = msgb_l3(msg);
switch (sih->system_information) {
case GSM48_MT_RR_PAG_REQ_1:
case GSM48_MT_RR_PAG_REQ_2:
case GSM48_MT_RR_PAG_REQ_3:
return 0;
case GSM48_MT_RR_IMM_ASS:
return imm_ass(ms, msg);
case GSM48_MT_RR_IMM_ASS_EXT:
return imm_ass_ext(ms, msg);
case GSM48_MT_RR_IMM_ASS_REJ:
return imm_ass_rej(ms, msg);
default:
return -EINVAL;
}
}
/* check if sysinfo is complete, change to RACH state */
static int new_sysinfo(void)
{
struct gsm48_sysinfo *s = &sysinfo;
/* restart timer */
start_timer(READ_WAIT);
/* mandatory */
if (!s->si1 || !s->si2 || !s->si3 || !s->si4) {
LOGP(DRR, LOGL_INFO, "not all mandatory SI received\n");
return 0;
}
/* extended band */
if (s->nb_ext_ind_si2 && !s->si2bis) {
LOGP(DRR, LOGL_INFO, "extended ba, but si2bis not received\n");
return 0;
}
/* 2ter */
if (s->si2ter_ind && !s->si2ter) {
LOGP(DRR, LOGL_INFO, "si2ter_ind, but si2ter not received\n");
return 0;
}
LOGP(DRR, LOGL_INFO, "Sysinfo complete\n");
stop_timer();
rach_count = 0;
start_rach();
return 0;
}
/* receive BCCH at RR layer */
static int bcch(struct osmocom_ms *ms, struct msgb *msg)
{
struct gsm48_sysinfo *s = &sysinfo;
struct gsm48_system_information_type_header *sih = msgb_l3(msg);
uint8_t ccch_mode;
if (msgb_l3len(msg) != 23) {
LOGP(DRR, LOGL_NOTICE, "Invalid BCCH message length\n");
return -EINVAL;
}
switch (sih->system_information) {
case GSM48_MT_RR_SYSINFO_1:
if (!memcmp(sih, s->si1_msg, sizeof(s->si1_msg)))
return 0;
LOGP(DRR, LOGL_INFO, "New SYSTEM INFORMATION 1\n");
gsm48_decode_sysinfo1(s,
(struct gsm48_system_information_type_1 *) sih,
msgb_l3len(msg));
return new_sysinfo();
case GSM48_MT_RR_SYSINFO_2:
if (!memcmp(sih, s->si2_msg, sizeof(s->si2_msg)))
return 0;
LOGP(DRR, LOGL_INFO, "New SYSTEM INFORMATION 2\n");
gsm48_decode_sysinfo2(s,
(struct gsm48_system_information_type_2 *) sih,
msgb_l3len(msg));
return new_sysinfo();
case GSM48_MT_RR_SYSINFO_2bis:
if (!memcmp(sih, s->si2b_msg, sizeof(s->si2b_msg)))
return 0;
LOGP(DRR, LOGL_INFO, "New SYSTEM INFORMATION 2bis\n");
gsm48_decode_sysinfo2bis(s,
(struct gsm48_system_information_type_2bis *) sih,
msgb_l3len(msg));
return new_sysinfo();
case GSM48_MT_RR_SYSINFO_2ter:
if (!memcmp(sih, s->si2t_msg, sizeof(s->si2t_msg)))
return 0;
LOGP(DRR, LOGL_INFO, "New SYSTEM INFORMATION 2ter\n");
gsm48_decode_sysinfo2ter(s,
(struct gsm48_system_information_type_2ter *) sih,
msgb_l3len(msg));
return new_sysinfo();
case GSM48_MT_RR_SYSINFO_3:
if (!memcmp(sih, s->si3_msg, sizeof(s->si3_msg)))
return 0;
LOGP(DRR, LOGL_INFO, "New SYSTEM INFORMATION 3\n");
gsm48_decode_sysinfo3(s,
(struct gsm48_system_information_type_3 *) sih,
msgb_l3len(msg));
ccch_mode = (s->ccch_conf == 1) ? CCCH_MODE_COMBINED :
CCCH_MODE_NON_COMBINED;
LOGP(DRR, LOGL_INFO, "Changing CCCH_MODE to %d\n", ccch_mode);
l1ctl_tx_ccch_mode_req(ms, ccch_mode);
return new_sysinfo();
case GSM48_MT_RR_SYSINFO_4:
if (!memcmp(sih, s->si4_msg, sizeof(s->si4_msg)))
return 0;
LOGP(DRR, LOGL_INFO, "New SYSTEM INFORMATION 4\n");
gsm48_decode_sysinfo4(s,
(struct gsm48_system_information_type_4 *) sih,
msgb_l3len(msg));
return new_sysinfo();
default:
return -EINVAL;
}
}
static int unit_data_ind(struct osmocom_ms *ms, struct msgb *msg)
{
struct abis_rsl_rll_hdr *rllh = msgb_l2(msg);
struct tlv_parsed tv;
uint8_t ch_type, ch_subch, ch_ts;
DEBUGP(DRSL, "RSLms UNIT DATA IND chan_nr=0x%02x link_id=0x%02x\n",
rllh->chan_nr, rllh->link_id);
if (rsl_tlv_parse(&tv, rllh->data, msgb_l2len(msg) - sizeof(*rllh)) < 0) {
LOGP(DRSL, LOGL_ERROR, "%s(): rsl_tlv_parse() failed\n", __func__);
return -EINVAL;
}
if (!TLVP_PRESENT(&tv, RSL_IE_L3_INFO)) {
DEBUGP(DRSL, "UNIT_DATA_IND without L3 INFO ?!?\n");
return -EIO;
}
msg->l3h = (uint8_t *) TLVP_VAL(&tv, RSL_IE_L3_INFO);
if (state != SCAN_STATE_READ && state != SCAN_STATE_RACH) {
return -EINVAL;
}
if (rsl_dec_chan_nr(rllh->chan_nr, &ch_type, &ch_subch, &ch_ts) != 0) {
LOGP(DRSL, LOGL_ERROR,
"%s(): rsl_dec_chan_nr(chan_nr=0x%02x) failed\n",
__func__, rllh->chan_nr);
return -EINVAL;
}
switch (ch_type) {
case RSL_CHAN_PCH_AGCH:
return pch_agch(ms, msg);
case RSL_CHAN_BCCH:
return bcch(ms, msg);
#if 0
case RSL_CHAN_Bm_ACCHs:
case RSL_CHAN_Lm_ACCHs:
case RSL_CHAN_SDCCH4_ACCH:
case RSL_CHAN_SDCCH8_ACCH:
return rx_acch(ms, msg);
#endif
default:
LOGP(DRSL, LOGL_NOTICE, "RSL with chan_nr 0x%02x unknown.\n",
rllh->chan_nr);
return -EINVAL;
}
}
static int rcv_rll(struct osmocom_ms *ms, struct msgb *msg)
{
struct abis_rsl_rll_hdr *rllh = msgb_l2(msg);
int msg_type = rllh->c.msg_type;
if (msg_type == RSL_MT_UNIT_DATA_IND) {
unit_data_ind(ms, msg);
} else
LOGP(DRSL, LOGL_NOTICE, "RSLms message unhandled\n");
msgb_free(msg);
return 0;
}
int chan_conf(struct osmocom_ms *ms, struct msgb *msg)
{
struct abis_rsl_cchan_hdr *ch = msgb_l2(msg);
struct gsm48_req_ref *ref = (struct gsm48_req_ref *) (ch->data + 1);
if (msgb_l2len(msg) < sizeof(*ch) + sizeof(*ref)) {
LOGP(DRR, LOGL_ERROR, "CHAN_CNF too slort\n");
return -EINVAL;
}
rach_ref.valid = 1;
rach_ref.t1 = ref->t1;
rach_ref.t2 = ref->t2;
rach_ref.t3 = ref->t3_low | (ref->t3_high << 3);
return 0;
}
static int rcv_cch(struct osmocom_ms *ms, struct msgb *msg)
{
struct abis_rsl_cchan_hdr *ch = msgb_l2(msg);
int msg_type = ch->c.msg_type;
int rc;
LOGP(DRSL, LOGL_INFO, "Received '%s' from layer1\n",
rsl_msg_name(msg_type));
if (state == SCAN_STATE_RACH && msg_type == RSL_MT_CHAN_CONF) {
rc = chan_conf(ms, msg);
msgb_free(msg);
return rc;
}
LOGP(DRSL, LOGL_NOTICE, "RSLms message unhandled\n");
msgb_free(msg);
return 0;
}
static int rcv_rsl(struct msgb *msg, struct lapdm_entity *le, void *l3ctx)
{
struct osmocom_ms *ms = l3ctx;
struct abis_rsl_common_hdr *rslh = msgb_l2(msg);
int rc = 0;
switch (rslh->msg_discr & 0xfe) {
case ABIS_RSL_MDISC_RLL:
rc = rcv_rll(ms, msg);
break;
case ABIS_RSL_MDISC_COM_CHAN:
rc = rcv_cch(ms, msg);
break;
default:
LOGP(DRSL, LOGL_NOTICE, "unknown RSLms msg_discr 0x%02x\n",
rslh->msg_discr);
msgb_free(msg);
rc = -EINVAL;
break;
}
return rc;
}
int scan_init(struct osmocom_ms *_ms)
{
ms = _ms;
osmo_signal_register_handler(SS_L1CTL, &signal_cb, NULL);
memset(&timer, 0, sizeof(timer));
lapdm_channel_set_l3(&ms->lapdm_channel, &rcv_rsl, ms);
g.enable = 1;
osmo_gps_init();
if (osmo_gps_open())
g.enable = 0;
if (!strcmp(logname, "-"))
logfp = stdout;
else
logfp = fopen(logname, "a");
if (!logfp) {
fprintf(stderr, "Failed to open logfile '%s'\n", logname);
scan_exit();
return -errno;
}
LOGP(DSUM, LOGL_INFO, "Scanner initialized\n");
return 0;
}
int scan_exit(void)
{
LOGP(DSUM, LOGL_INFO, "Scanner exit\n");
if (g.valid)
osmo_gps_close();
if (logfp)
fclose(logfp);
osmo_signal_unregister_handler(SS_L1CTL, &signal_cb, NULL);
stop_timer();
return 0;
}
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