| /* ip.access nanoBTS specific code */ |
| |
| /* (C) 2009-2018 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 <arpa/inet.h> |
| #include <time.h> |
| |
| #include <osmocom/gsm/tlv.h> |
| |
| #include <osmocom/bsc/gsm_data.h> |
| #include <osmocom/bsc/signal.h> |
| #include <osmocom/bsc/abis_nm.h> |
| #include <osmocom/abis/e1_input.h> |
| #include <osmocom/gsm/tlv.h> |
| #include <osmocom/core/msgb.h> |
| #include <osmocom/core/socket.h> |
| #include <osmocom/core/talloc.h> |
| #include <osmocom/core/utils.h> |
| #include <osmocom/bsc/gsm_data.h> |
| #include <osmocom/bsc/abis_nm.h> |
| #include <osmocom/bsc/abis_rsl.h> |
| #include <osmocom/bsc/debug.h> |
| #include <osmocom/abis/subchan_demux.h> |
| #include <osmocom/gsm/ipa.h> |
| #include <osmocom/abis/ipaccess.h> |
| #include <osmocom/core/logging.h> |
| #include <osmocom/bsc/ipaccess.h> |
| #include <osmocom/bsc/bts_ipaccess_nanobts_omlattr.h> |
| #include <osmocom/bsc/paging.h> |
| #include <osmocom/bsc/timeslot_fsm.h> |
| #include <osmocom/bsc/bts.h> |
| |
| static int bts_model_nanobts_start(struct gsm_network *net); |
| static void bts_model_nanobts_e1line_bind_ops(struct e1inp_line *line); |
| |
| static char *get_oml_status(const struct gsm_bts *bts) |
| { |
| if (bts->oml_link) |
| return all_trx_rsl_connected_unlocked(bts) ? "connected" : "degraded"; |
| |
| return "disconnected"; |
| } |
| |
| struct gsm_bts_model bts_model_nanobts = { |
| .type = GSM_BTS_TYPE_NANOBTS, |
| .name = "nanobts", |
| .start = bts_model_nanobts_start, |
| .oml_rcvmsg = &abis_nm_rcvmsg, |
| .oml_status = &get_oml_status, |
| .e1line_bind_ops = bts_model_nanobts_e1line_bind_ops, |
| /* Some nanoBTS firmwares (if not all) don't support SI2ter and cause |
| * problems on some MS if it is enabled, see OS#3063. Disable it by |
| * default, can still be enabled through VTY cmd with same name. |
| */ |
| .force_combined_si = true, |
| .nm_att_tlvdef = { |
| .def = { |
| /* ip.access specifics */ |
| [NM_ATT_IPACC_DST_IP] = { TLV_TYPE_FIXED, 4 }, |
| [NM_ATT_IPACC_DST_IP_PORT] = { TLV_TYPE_FIXED, 2 }, |
| [NM_ATT_IPACC_STREAM_ID] = { TLV_TYPE_TV, }, |
| [NM_ATT_IPACC_SEC_OML_CFG] = { TLV_TYPE_FIXED, 6 }, |
| [NM_ATT_IPACC_IP_IF_CFG] = { TLV_TYPE_FIXED, 8 }, |
| [NM_ATT_IPACC_IP_GW_CFG] = { TLV_TYPE_FIXED, 12 }, |
| [NM_ATT_IPACC_IN_SERV_TIME] = { TLV_TYPE_FIXED, 4 }, |
| [NM_ATT_IPACC_LOCATION] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_PAGING_CFG] = { TLV_TYPE_FIXED, 2 }, |
| [NM_ATT_IPACC_UNIT_ID] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_UNIT_NAME] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_SNMP_CFG] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_PRIM_OML_CFG_LIST] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_NV_FLAGS] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_FREQ_CTRL] = { TLV_TYPE_FIXED, 2 }, |
| [NM_ATT_IPACC_PRIM_OML_FB_TOUT] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_CUR_SW_CFG] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_TIMING_BUS] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_CGI] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_RAC] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_OBJ_VERSION] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_GPRS_PAGING_CFG]= { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_NSEI] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_BVCI] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_NSVCI] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_NS_CFG] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_BSSGP_CFG] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_NS_LINK_CFG] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_RLC_CFG] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_ALM_THRESH_LIST]= { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_MONIT_VAL_LIST] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_TIB_CONTROL] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_SUPP_FEATURES] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_CODING_SCHEMES] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_RLC_CFG_2] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_HEARTB_TOUT] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_UPTIME] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_RLC_CFG_3] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_SSL_CFG] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_SEC_POSSIBLE] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_IML_SSL_STATE] = { TLV_TYPE_TL16V }, |
| [NM_ATT_IPACC_REVOC_DATE] = { TLV_TYPE_TL16V }, |
| }, |
| }, |
| }; |
| |
| |
| /* Callback function to be called whenever we get a GSM 12.21 state change event */ |
| static int nm_statechg_event(int evt, struct nm_statechg_signal_data *nsd) |
| { |
| uint8_t obj_class = nsd->obj_class; |
| void *obj = nsd->obj; |
| struct gsm_nm_state *new_state = nsd->new_state; |
| |
| struct gsm_bts *bts; |
| struct gsm_bts_trx *trx; |
| struct gsm_bts_trx_ts *ts; |
| struct gsm_bts_gprs_nsvc *nsvc; |
| |
| struct msgb *msgb; |
| |
| if (!is_ipaccess_bts(nsd->bts)) |
| return 0; |
| |
| /* This event-driven BTS setup is currently only required on nanoBTS */ |
| |
| /* S_NM_STATECHG_ADM is called after we call chg_adm_state() and would create |
| * endless loop */ |
| if (evt != S_NM_STATECHG_OPER) |
| return 0; |
| |
| switch (obj_class) { |
| case NM_OC_SITE_MANAGER: |
| bts = container_of(obj, struct gsm_bts, site_mgr); |
| if ((new_state->operational == NM_OPSTATE_ENABLED && |
| new_state->availability == NM_AVSTATE_OK) || |
| (new_state->operational == NM_OPSTATE_DISABLED && |
| new_state->availability == NM_AVSTATE_OFF_LINE)) |
| abis_nm_opstart(bts, obj_class, 0xff, 0xff, 0xff); |
| break; |
| case NM_OC_BTS: |
| bts = obj; |
| if (new_state->availability == NM_AVSTATE_DEPENDENCY) { |
| msgb = nanobts_attr_bts_get(bts); |
| abis_nm_set_bts_attr(bts, msgb->data, msgb->len); |
| msgb_free(msgb); |
| abis_nm_chg_adm_state(bts, obj_class, |
| bts->bts_nr, 0xff, 0xff, |
| NM_STATE_UNLOCKED); |
| abis_nm_opstart(bts, obj_class, |
| bts->bts_nr, 0xff, 0xff); |
| } |
| break; |
| case NM_OC_CHANNEL: |
| ts = obj; |
| trx = ts->trx; |
| if (new_state->operational == NM_OPSTATE_DISABLED && |
| new_state->availability == NM_AVSTATE_DEPENDENCY) { |
| enum abis_nm_chan_comb ccomb = |
| abis_nm_chcomb4pchan(ts->pchan_from_config); |
| if (abis_nm_set_channel_attr(ts, ccomb) == -EINVAL) { |
| ipaccess_drop_oml_deferred(trx->bts); |
| return -1; |
| } |
| abis_nm_chg_adm_state(trx->bts, obj_class, |
| trx->bts->bts_nr, trx->nr, ts->nr, |
| NM_STATE_UNLOCKED); |
| abis_nm_opstart(trx->bts, obj_class, |
| trx->bts->bts_nr, trx->nr, ts->nr); |
| } |
| break; |
| case NM_OC_RADIO_CARRIER: |
| trx = obj; |
| if (new_state->operational == NM_OPSTATE_DISABLED && |
| new_state->availability == NM_AVSTATE_OK) |
| abis_nm_opstart(trx->bts, obj_class, trx->bts->bts_nr, |
| trx->nr, 0xff); |
| break; |
| case NM_OC_GPRS_NSE: |
| bts = container_of(obj, struct gsm_bts, gprs.nse); |
| if (bts->gprs.mode == BTS_GPRS_NONE) |
| break; |
| if (new_state->availability == NM_AVSTATE_DEPENDENCY) { |
| msgb = nanobts_attr_nse_get(bts); |
| abis_nm_ipaccess_set_attr(bts, obj_class, bts->bts_nr, |
| 0xff, 0xff, msgb->data, |
| msgb->len); |
| msgb_free(msgb); |
| abis_nm_opstart(bts, obj_class, bts->bts_nr, |
| 0xff, 0xff); |
| } |
| break; |
| case NM_OC_GPRS_CELL: |
| bts = container_of(obj, struct gsm_bts, gprs.cell); |
| if (bts->gprs.mode == BTS_GPRS_NONE) |
| break; |
| if (new_state->availability == NM_AVSTATE_DEPENDENCY) { |
| msgb = nanobts_attr_cell_get(bts); |
| abis_nm_ipaccess_set_attr(bts, obj_class, bts->bts_nr, |
| 0, 0xff, msgb->data, |
| msgb->len); |
| msgb_free(msgb); |
| abis_nm_opstart(bts, obj_class, bts->bts_nr, |
| 0, 0xff); |
| abis_nm_chg_adm_state(bts, obj_class, bts->bts_nr, |
| 0, 0xff, NM_STATE_UNLOCKED); |
| abis_nm_chg_adm_state(bts, NM_OC_GPRS_NSE, bts->bts_nr, |
| 0xff, 0xff, NM_STATE_UNLOCKED); |
| } |
| break; |
| case NM_OC_GPRS_NSVC: |
| nsvc = obj; |
| bts = nsvc->bts; |
| if (bts->gprs.mode == BTS_GPRS_NONE) |
| break; |
| /* We skip NSVC1 since we only use NSVC0 */ |
| if (nsvc->id == 1) |
| break; |
| if ((new_state->availability == NM_AVSTATE_OFF_LINE) || |
| (new_state->availability == NM_AVSTATE_DEPENDENCY)) { |
| msgb = nanobts_attr_nscv_get(bts); |
| abis_nm_ipaccess_set_attr(bts, obj_class, bts->bts_nr, |
| nsvc->id, 0xff, |
| msgb->data, msgb->len); |
| msgb_free(msgb); |
| abis_nm_opstart(bts, obj_class, bts->bts_nr, |
| nsvc->id, 0xff); |
| abis_nm_chg_adm_state(bts, obj_class, bts->bts_nr, |
| nsvc->id, 0xff, |
| NM_STATE_UNLOCKED); |
| } |
| default: |
| break; |
| } |
| return 0; |
| } |
| |
| /* Callback function to be called every time we receive a 12.21 SW activated report */ |
| static int sw_activ_rep(struct msgb *mb) |
| { |
| struct abis_om_fom_hdr *foh = msgb_l3(mb); |
| struct e1inp_sign_link *sign_link = mb->dst; |
| struct gsm_bts *bts = sign_link->trx->bts; |
| struct gsm_bts_trx *trx = gsm_bts_trx_num(bts, foh->obj_inst.trx_nr); |
| |
| if (!trx) |
| return -EINVAL; |
| |
| if (!is_ipaccess_bts(trx->bts)) |
| return 0; |
| |
| switch (foh->obj_class) { |
| case NM_OC_BASEB_TRANSC: |
| abis_nm_chg_adm_state(trx->bts, foh->obj_class, |
| trx->bts->bts_nr, trx->nr, 0xff, |
| NM_STATE_UNLOCKED); |
| abis_nm_opstart(trx->bts, foh->obj_class, |
| trx->bts->bts_nr, trx->nr, 0xff); |
| /* TRX software is active, tell it to initiate RSL Link */ |
| abis_nm_ipaccess_rsl_connect(trx, trx->bts->ip_access.rsl_ip, |
| 3003, trx->rsl_tei); |
| break; |
| case NM_OC_RADIO_CARRIER: { |
| /* |
| * Locking the radio carrier will make it go |
| * offline again and we would come here. The |
| * framework should determine that there was |
| * no change and avoid recursion. |
| * |
| * This code is here to make sure that on start |
| * a TRX remains locked. |
| */ |
| int rc_state = trx->mo.nm_state.administrative; |
| /* Patch ARFCN into radio attribute */ |
| struct msgb *msgb = nanobts_attr_radio_get(trx->bts, trx); |
| abis_nm_set_radio_attr(trx, msgb->data, msgb->len); |
| msgb_free(msgb); |
| abis_nm_chg_adm_state(trx->bts, foh->obj_class, |
| trx->bts->bts_nr, trx->nr, 0xff, |
| rc_state); |
| abis_nm_opstart(trx->bts, foh->obj_class, trx->bts->bts_nr, |
| trx->nr, 0xff); |
| break; |
| } |
| } |
| return 0; |
| } |
| |
| static void nm_rx_opstart_ack_chan(struct msgb *oml_msg) |
| { |
| struct gsm_bts_trx_ts *ts; |
| ts = abis_nm_get_ts(oml_msg); |
| if (!ts) |
| /* error already logged in abis_nm_get_ts() */ |
| return; |
| if (!ts->fi) { |
| LOG_TS(ts, LOGL_ERROR, "Channel OPSTART ACK for uninitialized TS\n"); |
| return; |
| } |
| |
| osmo_fsm_inst_dispatch(ts->fi, TS_EV_OML_READY, NULL); |
| } |
| |
| static void nm_rx_opstart_ack(struct msgb *oml_msg) |
| { |
| struct abis_om_fom_hdr *foh = msgb_l3(oml_msg); |
| switch (foh->obj_class) { |
| case NM_OC_CHANNEL: |
| nm_rx_opstart_ack_chan(oml_msg); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| /* Callback function to be called every time we receive a signal from NM */ |
| static int bts_ipa_nm_sig_cb(unsigned int subsys, unsigned int signal, |
| void *handler_data, void *signal_data) |
| { |
| if (subsys != SS_NM) |
| return 0; |
| |
| switch (signal) { |
| case S_NM_SW_ACTIV_REP: |
| return sw_activ_rep(signal_data); |
| case S_NM_STATECHG_OPER: |
| case S_NM_STATECHG_ADM: |
| return nm_statechg_event(signal, signal_data); |
| case S_NM_OPSTART_ACK: |
| nm_rx_opstart_ack(signal_data); |
| return 0; |
| default: |
| break; |
| } |
| return 0; |
| } |
| |
| static int bts_model_nanobts_start(struct gsm_network *net) |
| { |
| osmo_signal_unregister_handler(SS_NM, bts_ipa_nm_sig_cb, NULL); |
| osmo_signal_register_handler(SS_NM, bts_ipa_nm_sig_cb, NULL); |
| return 0; |
| } |
| |
| int bts_model_nanobts_init(void) |
| { |
| bts_model_nanobts.features.data = &bts_model_nanobts._features_data[0]; |
| bts_model_nanobts.features.data_len = |
| sizeof(bts_model_nanobts._features_data); |
| |
| osmo_bts_set_feature(&bts_model_nanobts.features, BTS_FEAT_GPRS); |
| osmo_bts_set_feature(&bts_model_nanobts.features, BTS_FEAT_EGPRS); |
| osmo_bts_set_feature(&bts_model_nanobts.features, BTS_FEAT_MULTI_TSC); |
| |
| return gsm_bts_model_register(&bts_model_nanobts); |
| } |
| |
| #define OML_UP 0x0001 |
| #define RSL_UP 0x0002 |
| |
| static struct gsm_bts * |
| find_bts_by_unitid(struct gsm_network *net, uint16_t site_id, uint16_t bts_id) |
| { |
| struct gsm_bts *bts; |
| |
| llist_for_each_entry(bts, &net->bts_list, list) { |
| if (!is_ipaccess_bts(bts)) |
| continue; |
| |
| if (bts->ip_access.site_id == site_id && |
| bts->ip_access.bts_id == bts_id) |
| return bts; |
| } |
| return NULL; |
| } |
| |
| /* These are exported because they are used by the VTY interface. */ |
| void ipaccess_drop_rsl(struct gsm_bts_trx *trx, const char *reason) |
| { |
| if (!trx->rsl_link) |
| return; |
| |
| LOG_TRX(trx, DLINP, LOGL_NOTICE, "Dropping RSL link: %s\n", reason); |
| e1inp_sign_link_destroy(trx->rsl_link); |
| trx->rsl_link = NULL; |
| osmo_stat_item_dec(trx->bts->bts_statg->items[BTS_STAT_RSL_CONNECTED], 1); |
| |
| if (trx->bts->c0 == trx) |
| paging_flush_bts(trx->bts, NULL); |
| } |
| |
| void ipaccess_drop_oml(struct gsm_bts *bts, const char *reason) |
| { |
| struct gsm_bts *rdep_bts; |
| struct gsm_bts_trx *trx; |
| |
| /* First of all, remove deferred drop if enabled */ |
| osmo_timer_del(&bts->oml_drop_link_timer); |
| |
| if (!bts->oml_link) |
| return; |
| |
| LOG_BTS(bts, DLINP, LOGL_NOTICE, "Dropping OML link: %s\n", reason); |
| e1inp_sign_link_destroy(bts->oml_link); |
| bts->oml_link = NULL; |
| bts->uptime = 0; |
| osmo_stat_item_dec(bts->bts_statg->items[BTS_STAT_OML_CONNECTED], 1); |
| |
| /* we have issues reconnecting RSL, drop everything. */ |
| llist_for_each_entry(trx, &bts->trx_list, list) |
| ipaccess_drop_rsl(trx, "OML link drop"); |
| |
| gsm_bts_all_ts_dispatch(bts, TS_EV_OML_DOWN, NULL); |
| |
| bts->ip_access.flags = 0; |
| |
| /* |
| * Go through the list and see if we are the depndency of a BTS |
| * and then drop the BTS. This can lead to some recursion but it |
| * should be fine in userspace. |
| * The oml_link is serving as recursion anchor for us and |
| * it is set to NULL some lines above. |
| */ |
| llist_for_each_entry(rdep_bts, &bts->network->bts_list, list) { |
| if (!bts_depend_is_depedency(rdep_bts, bts)) |
| continue; |
| LOGP(DLINP, LOGL_NOTICE, "Dropping BTS(%u) due BTS(%u).\n", |
| rdep_bts->nr, bts->nr); |
| ipaccess_drop_oml(rdep_bts, "Dependency link drop"); |
| } |
| } |
| |
| /*! Callback for \ref ipaccess_drop_oml_deferred_cb. |
| */ |
| static void ipaccess_drop_oml_deferred_cb(void *data) |
| { |
| struct gsm_bts *bts = (struct gsm_bts *) data; |
| ipaccess_drop_oml(bts, "Deferred link drop"); |
| } |
| /*! Deferr \ref ipacces_drop_oml through a timer to avoid dropping structures in |
| * current code context. This may be needed if we want to destroy the OML link |
| * while being called from a lower layer "struct osmo_fd" cb, were it is |
| * mandatory to return -EBADF if the osmo_fd has been destroyed. In case code |
| * destroying an OML link is called through an osmo_signal, it becomes |
| * impossible to return any value, thus deferring the destruction is required. |
| */ |
| void ipaccess_drop_oml_deferred(struct gsm_bts *bts) |
| { |
| if (!osmo_timer_pending(&bts->oml_drop_link_timer) && bts->oml_link) { |
| LOG_BTS(bts, DLINP, LOGL_NOTICE, "Deferring Drop of OML link.\n"); |
| osmo_timer_setup(&bts->oml_drop_link_timer, ipaccess_drop_oml_deferred_cb, bts); |
| osmo_timer_schedule(&bts->oml_drop_link_timer, 0, 0); |
| } |
| } |
| |
| /* Reject BTS because of an unknown unit ID */ |
| static void ipaccess_sign_link_reject(const struct ipaccess_unit *dev, const struct e1inp_ts* ts) |
| { |
| uint16_t site_id = dev->site_id; |
| uint16_t bts_id = dev->bts_id; |
| uint16_t trx_id = dev->trx_id; |
| char ip[INET6_ADDRSTRLEN]; |
| struct gsm_bts_rejected *entry = NULL; |
| struct gsm_bts_rejected *pos; |
| |
| /* Write to log and increase counter */ |
| LOGP(DLINP, LOGL_ERROR, "Unable to find BTS configuration for %u/%u/%u, disconnecting\n", site_id, bts_id, |
| trx_id); |
| rate_ctr_inc(&bsc_gsmnet->bsc_ctrs->ctr[BSC_CTR_UNKNOWN_UNIT_ID]); |
| |
| /* Get remote IP */ |
| if (osmo_sock_get_remote_ip(ts->driver.ipaccess.fd.fd, ip, sizeof(ip))) |
| return; |
| |
| /* Rejected list: unlink existing entry */ |
| llist_for_each_entry(pos, &bsc_gsmnet->bts_rejected, list) { |
| if (pos->site_id == site_id && pos->bts_id == bts_id && !strcmp(pos->ip, ip)) { |
| entry = pos; |
| llist_del(&entry->list); |
| break; |
| } |
| } |
| |
| /* Allocate new entry */ |
| if (!entry) { |
| entry = talloc_zero(tall_bsc_ctx, struct gsm_bts_rejected); |
| if (!entry) |
| return; |
| entry->site_id = site_id; |
| entry->bts_id = bts_id; |
| osmo_strlcpy(entry->ip, ip, sizeof(entry->ip)); |
| } |
| |
| /* Add to beginning with current timestamp */ |
| llist_add(&entry->list, &bsc_gsmnet->bts_rejected); |
| entry->time = time(NULL); |
| |
| /* Cut off last (oldest) element if we have too many */ |
| if (llist_count(&bsc_gsmnet->bts_rejected) > 25) { |
| pos = llist_last_entry(&bsc_gsmnet->bts_rejected, struct gsm_bts_rejected, list); |
| llist_del(&pos->list); |
| talloc_free(pos); |
| } |
| } |
| |
| /* This function is called once the OML/RSL link becomes up. */ |
| static struct e1inp_sign_link * |
| ipaccess_sign_link_up(void *unit_data, struct e1inp_line *line, |
| enum e1inp_sign_type type) |
| { |
| struct gsm_bts *bts; |
| struct ipaccess_unit *dev = unit_data; |
| struct e1inp_sign_link *sign_link = NULL; |
| struct timespec tp; |
| int rc; |
| |
| bts = find_bts_by_unitid(bsc_gsmnet, dev->site_id, dev->bts_id); |
| if (!bts) { |
| ipaccess_sign_link_reject(dev, &line->ts[E1INP_SIGN_OML - 1]); |
| return NULL; |
| } |
| DEBUGP(DLINP, "%s: Identified BTS %u/%u/%u\n", e1inp_signtype_name(type), |
| dev->site_id, dev->bts_id, dev->trx_id); |
| |
| switch(type) { |
| case E1INP_SIGN_OML: |
| /* remove old OML signal link for this BTS. */ |
| ipaccess_drop_oml(bts, "new OML link"); |
| |
| if (!bts_depend_check(bts)) { |
| LOGP(DLINP, LOGL_NOTICE, |
| "Dependency not full-filled for %u/%u/%u\n", |
| dev->site_id, dev->bts_id, dev->trx_id); |
| return NULL; |
| } |
| |
| /* create new OML link. */ |
| sign_link = bts->oml_link = |
| e1inp_sign_link_create(&line->ts[E1INP_SIGN_OML - 1], |
| E1INP_SIGN_OML, bts->c0, |
| bts->oml_tei, 0); |
| rc = clock_gettime(CLOCK_MONOTONIC, &tp); |
| bts->uptime = (rc < 0) ? 0 : tp.tv_sec; /* we don't need sub-second precision for uptime */ |
| if (!(sign_link->trx->bts->ip_access.flags & OML_UP)) { |
| e1inp_event(sign_link->ts, S_L_INP_TEI_UP, |
| sign_link->tei, sign_link->sapi); |
| sign_link->trx->bts->ip_access.flags |= OML_UP; |
| } |
| osmo_stat_item_inc(bts->bts_statg->items[BTS_STAT_OML_CONNECTED], 1); |
| break; |
| case E1INP_SIGN_RSL: { |
| struct e1inp_ts *ts; |
| struct gsm_bts_trx *trx = gsm_bts_trx_num(bts, dev->trx_id); |
| |
| /* no OML link set yet? give up. */ |
| if (!bts->oml_link || !trx) |
| return NULL; |
| |
| /* remove old RSL link for this TRX. */ |
| ipaccess_drop_rsl(trx, "new RSL link"); |
| |
| /* set new RSL link for this TRX. */ |
| line = bts->oml_link->ts->line; |
| ts = &line->ts[E1INP_SIGN_RSL + dev->trx_id - 1]; |
| e1inp_ts_config_sign(ts, line); |
| sign_link = trx->rsl_link = |
| e1inp_sign_link_create(ts, E1INP_SIGN_RSL, |
| trx, trx->rsl_tei, 0); |
| trx->rsl_link->ts->sign.delay = 0; |
| if (!(sign_link->trx->bts->ip_access.flags & |
| (RSL_UP << sign_link->trx->nr))) { |
| e1inp_event(sign_link->ts, S_L_INP_TEI_UP, |
| sign_link->tei, sign_link->sapi); |
| sign_link->trx->bts->ip_access.flags |= |
| (RSL_UP << sign_link->trx->nr); |
| } |
| osmo_stat_item_inc(bts->bts_statg->items[BTS_STAT_RSL_CONNECTED], 1); |
| break; |
| } |
| default: |
| break; |
| } |
| return sign_link; |
| } |
| |
| static void ipaccess_sign_link_down(struct e1inp_line *line) |
| { |
| /* No matter what link went down, we close both signal links. */ |
| struct e1inp_ts *ts = &line->ts[E1INP_SIGN_OML-1]; |
| struct gsm_bts *bts = NULL; |
| struct e1inp_sign_link *link; |
| |
| LOGPIL(line, DLINP, LOGL_NOTICE, "Signalling link down\n"); |
| |
| llist_for_each_entry(link, &ts->sign.sign_links, list) { |
| /* Get bts pointer from the first element of the list. */ |
| if (bts == NULL) |
| bts = link->trx->bts; |
| /* Cancel RSL connection timeout in case are still waiting for an RSL connection. */ |
| if (link->trx->mo.nm_state.administrative == NM_STATE_UNLOCKED) |
| osmo_timer_del(&link->trx->rsl_connect_timeout); |
| } |
| if (bts != NULL) |
| ipaccess_drop_oml(bts, "link down"); |
| else |
| LOGPIL(line, DLINP, LOGL_NOTICE, "Signalling link down for unknown BTS\n"); |
| } |
| |
| /* This function is called if we receive one OML/RSL message. */ |
| static int ipaccess_sign_link(struct msgb *msg) |
| { |
| int ret = 0; |
| struct e1inp_sign_link *link = msg->dst; |
| |
| switch (link->type) { |
| case E1INP_SIGN_RSL: |
| ret = abis_rsl_rcvmsg(msg); |
| break; |
| case E1INP_SIGN_OML: |
| ret = abis_nm_rcvmsg(msg); |
| break; |
| default: |
| LOGP(DLINP, LOGL_ERROR, "Unknown signal link type %d\n", |
| link->type); |
| msgb_free(msg); |
| break; |
| } |
| return ret; |
| } |
| |
| /* not static, ipaccess-config needs it. */ |
| struct e1inp_line_ops ipaccess_e1inp_line_ops = { |
| .cfg = { |
| .ipa = { |
| .addr = "0.0.0.0", |
| .role = E1INP_LINE_R_BSC, |
| }, |
| }, |
| .sign_link_up = ipaccess_sign_link_up, |
| .sign_link_down = ipaccess_sign_link_down, |
| .sign_link = ipaccess_sign_link, |
| }; |
| |
| static void bts_model_nanobts_e1line_bind_ops(struct e1inp_line *line) |
| { |
| e1inp_line_bind_ops(line, &ipaccess_e1inp_line_ops); |
| } |