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-rw-r--r--src/ipaccess/network_listen.c251
1 files changed, 251 insertions, 0 deletions
diff --git a/src/ipaccess/network_listen.c b/src/ipaccess/network_listen.c
new file mode 100644
index 00000000..aaf7c974
--- /dev/null
+++ b/src/ipaccess/network_listen.c
@@ -0,0 +1,251 @@
+/* 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 <osmocore/talloc.h>
+#include <osmocore/timer.h>
+#include <osmocore/rxlev_stat.h>
+#include <osmocore/gsm48_ie.h>
+
+#include <openbsc/gsm_data.h>
+#include <openbsc/abis_nm.h>
+#include <openbsc/signal.h>
+#include <openbsc/debug.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 {
+ uint16_t arfcn:10,
+ rxlev:6;
+} __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;
+ 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 */
+ test_rep_len = ntohs(*(uint16_t *) &foh->data[3]);
+ /* 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 */
+ ferr_list_len = ntohs(*(uint16_t *) &foh->data[7]);
+
+ /* 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 */
+ ferr_list_len = ntohs(*(uint16_t *) &foh->data[7]);
+
+ /* 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(&msg->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: %3d-%d, LAC %d CI %d BSIC %u\n",
+ binfo.arfcn, binfo.rx_lev, binfo.rx_qual,
+ binfo.cgi.mcc, binfo.cgi.mnc,
+ binfo.cgi.lac, binfo.cgi.ci, 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", 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", 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", 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:
+ msg->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");
+ dispatch_signal(SS_IPAC_NWL, S_IPAC_NWL_COMPLETE, msg->trx);
+ break;
+ case NM_IPACC_TESTRES_PARTIAL:
+ msg->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)
+{
+ register_signal_handler(SS_NM, nwl_sig_cb, NULL);
+}