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/* ip.access nanoBTS network listen mode */
/* (C) 2009-2010 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 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 <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <stdint.h>
#include <arpa/inet.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/timer.h>
#include <osmocom/gsm/rxlev_stat.h>
#include <osmocom/gsm/gsm48_ie.h>
#include <osmocom/bsc/gsm_data.h>
#include <osmocom/bsc/abis_nm.h>
#include <osmocom/bsc/signal.h>
#include <osmocom/bsc/debug.h>
#include <osmocom/abis/e1_input.h>
#include <osmocom/core/endian.h>
#define WHITELIST_MAX_SIZE ((NUM_ARFCNS*2)+2+1)
int ipac_rxlevstat2whitelist(uint16_t *buf, const struct rxlev_stats *st, uint8_t min_rxlev,
uint16_t max_num_arfcns)
{
int i;
unsigned int num_arfcn = 0;
for (i = NUM_RXLEVS-1; i >= min_rxlev; i--) {
int16_t arfcn = -1;
while ((arfcn = rxlev_stat_get_next(st, i, arfcn)) >= 0) {
*buf++ = htons(arfcn);
num_arfcn++;
}
if (num_arfcn > max_num_arfcns)
break;
}
return num_arfcn;
}
enum ipac_test_state {
IPAC_TEST_S_IDLE,
IPAC_TEST_S_RQD,
IPAC_TEST_S_EXEC,
IPAC_TEST_S_PARTIAL,
};
int ipac_nwl_test_start(struct gsm_bts_trx *trx, uint8_t testnr,
const uint8_t *phys_conf, unsigned int phys_conf_len)
{
struct msgb *msg;
if (trx->ipaccess.test_state != IPAC_TEST_S_IDLE) {
fprintf(stderr, "Cannot start test in state %u\n", trx->ipaccess.test_state);
return -EINVAL;
}
switch (testnr) {
case NM_IPACC_TESTNO_CHAN_USAGE:
case NM_IPACC_TESTNO_BCCH_CHAN_USAGE:
rxlev_stat_reset(&trx->ipaccess.rxlev_stat);
break;
}
msg = msgb_alloc_headroom(phys_conf_len+256, 128, "OML");
if (phys_conf && phys_conf_len) {
uint8_t *payload;
/* first put the phys conf header */
msgb_tv16_put(msg, NM_ATT_PHYS_CONF, phys_conf_len);
payload = msgb_put(msg, phys_conf_len);
memcpy(payload, phys_conf, phys_conf_len);
}
abis_nm_perform_test(trx->bts, NM_OC_RADIO_CARRIER, 0, trx->nr, 0xff,
testnr, 1, msg);
trx->ipaccess.test_nr = testnr;
/* FIXME: start safety timer until when test is supposed to complete */
return 0;
}
static uint16_t last_arfcn;
static struct gsm_sysinfo_freq nwl_si_freq[1024];
#define FREQ_TYPE_NCELL_2 0x04 /* sub channel of SI 2 */
#define FREQ_TYPE_NCELL_2bis 0x08 /* sub channel of SI 2bis */
#define FREQ_TYPE_NCELL_2ter 0x10 /* sub channel of SI 2ter */
struct ipacc_ferr_elem {
int16_t freq_err;
uint8_t freq_qual;
uint8_t arfcn;
} __attribute__((packed));
struct ipacc_cusage_elem {
#if OSMO_IS_LITTLE_ENDIAN == 1
uint16_t arfcn:10,
rxlev:6;
#else
uint16_t rxlev:6,
arfcn:10;
#endif
} __attribute__ ((packed));
static int test_rep(void *_msg)
{
struct msgb *msg = _msg;
struct abis_om_fom_hdr *foh = msgb_l3(msg);
uint16_t test_rep_len, ferr_list_len;
struct ipacc_ferr_elem *ife;
struct ipac_bcch_info binfo;
struct e1inp_sign_link *sign_link = (struct e1inp_sign_link *)msg->dst;
int i, rc;
DEBUGP(DNM, "TEST REPORT: ");
if (foh->data[0] != NM_ATT_TEST_NO ||
foh->data[2] != NM_ATT_TEST_REPORT)
return -EINVAL;
DEBUGPC(DNM, "test_no=0x%02x ", foh->data[1]);
/* data[2] == NM_ATT_TEST_REPORT */
/* data[3..4]: test_rep_len */
memcpy(&test_rep_len, &foh->data[3], sizeof(uint16_t));
test_rep_len = ntohs(test_rep_len);
/* data[5]: ip.access test result */
DEBUGPC(DNM, "tst_res=%s\n", ipacc_testres_name(foh->data[5]));
/* data[6]: ip.access nested IE. 3 == freq_err_list */
switch (foh->data[6]) {
case NM_IPAC_EIE_FREQ_ERR_LIST:
/* data[7..8]: length of ferr_list */
memcpy(&ferr_list_len, &foh->data[7], sizeof(uint16_t));
ferr_list_len = ntohs(ferr_list_len);
/* data[9...]: frequency error list elements */
for (i = 0; i < ferr_list_len; i+= sizeof(*ife)) {
ife = (struct ipacc_ferr_elem *) (foh->data + 9 + i);
DEBUGP(DNM, "==> ARFCN %4u, Frequency Error %6hd\n",
ife->arfcn, ntohs(ife->freq_err));
}
break;
case NM_IPAC_EIE_CHAN_USE_LIST:
/* data[7..8]: length of ferr_list */
memcpy(&ferr_list_len, &foh->data[7], sizeof(uint16_t));
ferr_list_len = ntohs(ferr_list_len);
/* data[9...]: channel usage list elements */
for (i = 0; i < ferr_list_len; i+= 2) {
uint16_t *cu_ptr = (uint16_t *)(foh->data + 9 + i);
uint16_t cu = ntohs(*cu_ptr);
uint16_t arfcn = cu & 0x3ff;
uint8_t rxlev = cu >> 10;
DEBUGP(DNM, "==> ARFCN %4u, RxLev %2u\n", arfcn, rxlev);
rxlev_stat_input(&sign_link->trx->ipaccess.rxlev_stat,
arfcn, rxlev);
}
break;
case NM_IPAC_EIE_BCCH_INFO_TYPE:
break;
case NM_IPAC_EIE_BCCH_INFO:
rc = ipac_parse_bcch_info(&binfo, foh->data+6);
if (rc < 0) {
DEBUGP(DNM, "BCCH Info parsing failed\n");
break;
}
DEBUGP(DNM, "==> ARFCN %u, RxLev %2u, RxQual %2u: %s, LAC %d CI %d BSIC %u\n",
binfo.arfcn, binfo.rx_lev, binfo.rx_qual,
osmo_plmn_name(&binfo.cgi.lai.plmn),
binfo.cgi.lai.lac, binfo.cgi.cell_identity, binfo.bsic);
if (binfo.arfcn != last_arfcn) {
/* report is on a new arfcn, need to clear channel list */
memset(nwl_si_freq, 0, sizeof(nwl_si_freq));
last_arfcn = binfo.arfcn;
}
if (binfo.info_type & IPAC_BINF_NEIGH_BA_SI2) {
DEBUGP(DNM, "BA SI2: %s\n", osmo_hexdump(binfo.ba_list_si2, sizeof(binfo.ba_list_si2)));
gsm48_decode_freq_list(nwl_si_freq, binfo.ba_list_si2, sizeof(binfo.ba_list_si2),
0x8c, FREQ_TYPE_NCELL_2);
}
if (binfo.info_type & IPAC_BINF_NEIGH_BA_SI2bis) {
DEBUGP(DNM, "BA SI2bis: %s\n", osmo_hexdump(binfo.ba_list_si2bis, sizeof(binfo.ba_list_si2bis)));
gsm48_decode_freq_list(nwl_si_freq, binfo.ba_list_si2bis, sizeof(binfo.ba_list_si2bis),
0x8e, FREQ_TYPE_NCELL_2bis);
}
if (binfo.info_type & IPAC_BINF_NEIGH_BA_SI2ter) {
DEBUGP(DNM, "BA SI2ter: %s\n", osmo_hexdump(binfo.ba_list_si2ter, sizeof(binfo.ba_list_si2ter)));
gsm48_decode_freq_list(nwl_si_freq, binfo.ba_list_si2ter, sizeof(binfo.ba_list_si2ter),
0x8e, FREQ_TYPE_NCELL_2ter);
}
for (i = 0; i < ARRAY_SIZE(nwl_si_freq); i++) {
if (nwl_si_freq[i].mask)
DEBUGP(DNM, "Neighbor Cell on ARFCN %u\n", i);
}
break;
default:
break;
}
switch (foh->data[5]) {
case NM_IPACC_TESTRES_SUCCESS:
case NM_IPACC_TESTRES_STOPPED:
case NM_IPACC_TESTRES_TIMEOUT:
case NM_IPACC_TESTRES_NO_CHANS:
sign_link->trx->ipaccess.test_state = IPAC_TEST_S_IDLE;
/* Send signal to notify higher layers of test completion */
DEBUGP(DNM, "dispatching S_IPAC_NWL_COMPLETE signal\n");
osmo_signal_dispatch(SS_IPAC_NWL, S_IPAC_NWL_COMPLETE,
sign_link->trx);
break;
case NM_IPACC_TESTRES_PARTIAL:
sign_link->trx->ipaccess.test_state = IPAC_TEST_S_PARTIAL;
break;
}
return 0;
}
static int nwl_sig_cb(unsigned int subsys, unsigned int signal,
void *handler_data, void *signal_data)
{
switch (signal) {
case S_NM_TEST_REP:
return test_rep(signal_data);
default:
break;
}
return 0;
}
void ipac_nwl_init(void)
{
osmo_signal_register_handler(SS_NM, nwl_sig_cb, NULL);
}
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