/* ip.access nanoBTS specific code */ /* (C) 2009-2018 by Harald Welte * (C) 2020 by sysmocom s.f.m.c. GmbH * * 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 . * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static int bts_model_nanobts_start(struct gsm_network *net); static void bts_model_nanobts_e1line_bind_ops(struct e1inp_line *line); static int power_ctrl_send_def_params(const struct gsm_bts_trx *trx); static int power_ctrl_enc_rsl_params(struct msgb *msg, const struct gsm_power_ctrl_params *cp); 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, /* MS/BS Power control specific API */ .power_ctrl_send_def_params = &power_ctrl_send_def_params, .power_ctrl_enc_rsl_params = &power_ctrl_enc_rsl_params, /* 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 }, }, }, .features_get_reported = false, }; /* 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_bts_sm *bts_sm; struct gsm_bts *bts; struct gsm_bts_trx *trx; struct gsm_bts_bb_trx *bb_transc; struct gsm_bts_trx_ts *ts; struct gsm_gprs_nsvc *nsvc; struct gsm_gprs_nse *nse; struct gsm_gprs_cell *cell; if (!is_ipa_abisip_bts(nsd->bts)) return 0; switch (obj_class) { case NM_OC_SITE_MANAGER: bts_sm = obj; osmo_fsm_inst_dispatch(bts_sm->mo.fi, NM_EV_STATE_CHG_REP, nsd); break; case NM_OC_BTS: bts = obj; osmo_fsm_inst_dispatch(bts->mo.fi, NM_EV_STATE_CHG_REP, nsd); break; case NM_OC_BASEB_TRANSC: bb_transc = obj; osmo_fsm_inst_dispatch(bb_transc->mo.fi, NM_EV_STATE_CHG_REP, nsd); break; case NM_OC_CHANNEL: ts = obj; osmo_fsm_inst_dispatch(ts->mo.fi, NM_EV_STATE_CHG_REP, nsd); break; case NM_OC_RADIO_CARRIER: trx = obj; osmo_fsm_inst_dispatch(trx->mo.fi, NM_EV_STATE_CHG_REP, nsd); break; case NM_OC_GPRS_NSE: nse = obj; osmo_fsm_inst_dispatch(nse->mo.fi, NM_EV_STATE_CHG_REP, nsd); break; case NM_OC_GPRS_CELL: cell = obj; osmo_fsm_inst_dispatch(cell->mo.fi, NM_EV_STATE_CHG_REP, nsd); break; case NM_OC_GPRS_NSVC: nsvc = obj; osmo_fsm_inst_dispatch(nsvc->mo.fi, NM_EV_STATE_CHG_REP, nsd); break; 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) { const 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_abis_mo *mo; struct tlv_parsed tp; if (!is_ipa_abisip_bts(bts)) return 0; mo = gsm_objclass2mo(bts, foh->obj_class, &foh->obj_inst); if (mo == NULL) { LOGPFOH(DNM, LOGL_ERROR, foh, "Rx SW activated report for non-existent MO\n"); return -ENOENT; } if (abis_nm_tlv_parse(&tp, bts, &foh->data[0], msgb_l3len(mb) - sizeof(*foh)) < 0) { LOGPFOH(DNM, LOGL_ERROR, foh, "%s(): tlv_parse failed\n", __func__); return -EINVAL; } mo->ipaccess.obj_version = 0; /* implicit default */ if (TLVP_PRES_LEN(&tp, NM_ATT_IPACC_OBJ_VERSION, 1)) { const uint8_t *versions = TLVP_VAL(&tp, NM_ATT_IPACC_OBJ_VERSION); char buf[256]; struct osmo_strbuf sb = { .buf = buf, .len = sizeof(buf) }; /* nanoBTS may report several Object Versions; the first one will * be used by default unless requested explicitly before OPSTARTing. */ mo->ipaccess.obj_version = versions[0]; OSMO_STRBUF_PRINTF(sb, "%u (default)", versions[0]); for (uint16_t i = 1; i < TLVP_LEN(&tp, NM_ATT_IPACC_OBJ_VERSION); i++) OSMO_STRBUF_PRINTF(sb, ", %u", versions[i]); LOGPFOH(DNM, LOGL_INFO, foh, "IPA Object Versions supported: %s\n", buf); } osmo_fsm_inst_dispatch(mo->fi, NM_EV_SW_ACT_REP, NULL); return 0; } static void nm_rx_opstart_ack(struct msgb *oml_msg) { const struct abis_om_fom_hdr *foh = msgb_l3(oml_msg); struct e1inp_sign_link *sign_link = oml_msg->dst; struct gsm_bts *bts = sign_link->trx->bts; struct gsm_abis_mo *mo; if (!is_ipa_abisip_bts(bts)) return; mo = gsm_objclass2mo(bts, foh->obj_class, &foh->obj_inst); if (mo == NULL) LOGPFOH(DNM, LOGL_ERROR, foh, "Rx OPSTART ACK for non-existent MO\n"); else osmo_fsm_inst_dispatch(mo->fi, NM_EV_OPSTART_ACK, NULL); } static void nm_rx_opstart_nack(struct msgb *oml_msg) { const struct abis_om_fom_hdr *foh = msgb_l3(oml_msg); struct e1inp_sign_link *sign_link = oml_msg->dst; struct gsm_bts *bts = sign_link->trx->bts; struct gsm_abis_mo *mo; if (!is_ipa_abisip_bts(bts)) return; mo = gsm_objclass2mo(bts, foh->obj_class, &foh->obj_inst); if (mo == NULL) LOGPFOH(DNM, LOGL_ERROR, foh, "Rx OPSTART NACK for non-existent MO\n"); else osmo_fsm_inst_dispatch(mo->fi, NM_EV_OPSTART_NACK, NULL); } static void nm_rx_get_attr_rep(struct msgb *oml_msg) { struct abis_om_fom_hdr *foh = msgb_l3(oml_msg); struct e1inp_sign_link *sign_link = oml_msg->dst; struct gsm_bts *bts = sign_link->trx->bts; struct gsm_abis_mo *mo; if (!is_ipa_abisip_bts(bts)) return; mo = gsm_objclass2mo(bts, foh->obj_class, &foh->obj_inst); if (mo == NULL) LOGPFOH(DNM, LOGL_ERROR, foh, "Rx Get Attribute Report for non-existent MO\n"); else osmo_fsm_inst_dispatch(mo->fi, NM_EV_GET_ATTR_REP, NULL); } static void nm_rx_set_bts_attr_ack(struct msgb *oml_msg) { struct abis_om_fom_hdr *foh = msgb_l3(oml_msg); struct e1inp_sign_link *sign_link = oml_msg->dst; struct gsm_bts *bts = sign_link->trx->bts; if (!is_ipa_abisip_bts(bts)) return; if (foh->obj_class != NM_OC_BTS) { LOG_BTS(bts, DNM, LOGL_ERROR, "Set BTS Attr Ack received on non BTS object!\n"); return; } osmo_fsm_inst_dispatch(bts->mo.fi, NM_EV_SET_ATTR_ACK, NULL); } static void nm_rx_set_radio_attr_ack(struct msgb *oml_msg) { struct abis_om_fom_hdr *foh = msgb_l3(oml_msg); struct e1inp_sign_link *sign_link = oml_msg->dst; struct gsm_bts *bts = sign_link->trx->bts; struct gsm_bts_trx *trx; if (!is_ipa_abisip_bts(bts)) return; trx = gsm_bts_trx_num(bts, foh->obj_inst.trx_nr); if (!trx || foh->obj_class != NM_OC_RADIO_CARRIER) { LOGPFOH(DNM, LOGL_ERROR, foh, "Set Radio Carrier Attr Ack received on non Radio Carrier object!\n"); return; } osmo_fsm_inst_dispatch(trx->mo.fi, NM_EV_SET_ATTR_ACK, NULL); } static void nm_rx_set_chan_attr_ack(struct msgb *oml_msg) { struct abis_om_fom_hdr *foh = msgb_l3(oml_msg); struct e1inp_sign_link *sign_link = oml_msg->dst; struct gsm_bts *bts = sign_link->trx->bts; struct gsm_bts_trx_ts *ts; if (!is_ipa_abisip_bts(bts)) return; ts = abis_nm_get_ts(oml_msg); if (!ts || foh->obj_class != NM_OC_CHANNEL) { LOGPFOH(DNM, LOGL_ERROR, foh, "Set Channel Attr Ack received on non Radio Channel object!\n"); return; } osmo_fsm_inst_dispatch(ts->mo.fi, NM_EV_SET_ATTR_ACK, NULL); } static void nm_rx_ipacc_set_attr_ack(struct ipacc_ack_signal_data *sig_data) { struct gsm_bts *bts = sig_data->bts; struct abis_om_fom_hdr *foh = sig_data->foh; void *obj; struct gsm_gprs_nse *nse; struct gsm_gprs_cell *cell; struct gsm_gprs_nsvc *nsvc; obj = gsm_objclass2obj(bts, foh->obj_class, &foh->obj_inst); switch (foh->obj_class) { case NM_OC_GPRS_NSE: nse = obj; osmo_fsm_inst_dispatch(nse->mo.fi, NM_EV_SET_ATTR_ACK, NULL); break; case NM_OC_GPRS_CELL: cell = obj; osmo_fsm_inst_dispatch(cell->mo.fi, NM_EV_SET_ATTR_ACK, NULL); break; case NM_OC_GPRS_NSVC: if (!(nsvc = gsm_bts_sm_nsvc_num(bts->site_mgr, foh->obj_inst.trx_nr))) return; osmo_fsm_inst_dispatch(nsvc->mo.fi, NM_EV_SET_ATTR_ACK, NULL); break; default: LOGPFOH(DNM, LOGL_ERROR, foh, "IPACC Set Attr Ack received on incorrect object class %d!\n", foh->obj_class); } } static void nm_rx_ipacc_rsl_connect_ack(struct ipacc_ack_signal_data *sig_data) { struct gsm_bts *bts = sig_data->bts; struct abis_om_fom_hdr *foh = sig_data->foh; struct gsm_bts_trx *trx; if (foh->obj_class != NM_OC_BASEB_TRANSC) { LOGPFOH(DNM, LOGL_ERROR, foh, "IPACC RSL Connect ACK received on incorrect object class %d!\n", foh->obj_class); return; } trx = gsm_bts_trx_num(bts, foh->obj_inst.trx_nr); osmo_fsm_inst_dispatch(trx->bb_transc.mo.fi, NM_EV_RSL_CONNECT_ACK, NULL); } static void nm_rx_ipacc_ack(struct ipacc_ack_signal_data *sig_data) { switch (sig_data->foh->msg_type) { case NM_MT_IPACC_SET_ATTR_ACK: nm_rx_ipacc_set_attr_ack(sig_data); break; case NM_MT_IPACC_RSL_CONNECT_ACK: nm_rx_ipacc_rsl_connect_ack(sig_data); break; default: break; } } static void nm_rx_ipacc_rsl_connect_nack(struct ipacc_ack_signal_data *sig_data) { struct gsm_bts *bts = sig_data->bts; struct abis_om_fom_hdr *foh = sig_data->foh; struct gsm_bts_trx *trx; if (foh->obj_class != NM_OC_BASEB_TRANSC) { LOGPFOH(DNM, LOGL_ERROR, foh, "IPACC RSL Connect NACK received on incorrect object class %d!\n", foh->obj_class); return; } trx = gsm_bts_trx_num(bts, foh->obj_inst.trx_nr); osmo_fsm_inst_dispatch(trx->bb_transc.mo.fi, NM_EV_RSL_CONNECT_NACK, NULL); } static void nm_rx_ipacc_nack(struct ipacc_ack_signal_data *sig_data) { switch (sig_data->foh->msg_type) { case NM_MT_IPACC_RSL_CONNECT_ACK: nm_rx_ipacc_rsl_connect_nack(sig_data); 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: return nm_statechg_event(signal, signal_data); case S_NM_OPSTART_ACK: nm_rx_opstart_ack(signal_data); return 0; case S_NM_OPSTART_NACK: nm_rx_opstart_nack(signal_data); return 0; case S_NM_GET_ATTR_REP: nm_rx_get_attr_rep(signal_data); return 0; case S_NM_SET_BTS_ATTR_ACK: nm_rx_set_bts_attr_ack(signal_data); return 0; case S_NM_SET_RADIO_ATTR_ACK: nm_rx_set_radio_attr_ack(signal_data); return 0; case S_NM_SET_CHAN_ATTR_ACK: nm_rx_set_chan_attr_ack(signal_data); return 0; case S_NM_IPACC_ACK: nm_rx_ipacc_ack(signal_data); return 0; case S_NM_IPACC_NACK: nm_rx_ipacc_nack(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_ipa_abisip_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) { struct e1inp_sign_link *link; if (!trx->rsl_link_primary) return; LOG_TRX(trx, DLINP, LOGL_NOTICE, "Dropping RSL link: %s\n", reason); /* Mark bts->rsl_link_primary ptr null before calling sign_link_destroy, * to avoid a callback triggering this same code path. */ link = trx->rsl_link_primary; trx->rsl_link_primary = NULL; e1inp_sign_link_destroy(link); osmo_stat_item_dec(osmo_stat_item_group_get_item(trx->bts->bts_statg, 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; struct gsm_bts_trx_ts *ts ; uint8_t tn; uint8_t i; struct timespec tp; int rc; struct e1inp_sign_link *link; /* 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); /* Mark bts->oml_link ptr null before calling sign_link_destroy, * to avoid a callback triggering this same code path. */ link = bts->oml_link; bts->oml_link = NULL; e1inp_sign_link_destroy(link); rc = osmo_clock_gettime(CLOCK_MONOTONIC, &tp); bts->updowntime = (rc < 0) ? 0 : tp.tv_sec; /* we don't need sub-second precision for downtime */ osmo_stat_item_dec(osmo_stat_item_group_get_item(bts->bts_statg, BTS_STAT_OML_CONNECTED), 1); gsm_bts_stats_reset(bts); /* Also drop the associated OSMO link */ OSMO_ASSERT(bts->osmo_link); link = bts->osmo_link; bts->osmo_link = NULL; e1inp_sign_link_destroy(link); bts_setup_ramp_remove(bts); /* we have issues reconnecting RSL, drop everything. */ llist_for_each_entry(trx, &bts->trx_list, list) { ipaccess_drop_rsl(trx, "OML link drop"); osmo_fsm_inst_dispatch(trx->bb_transc.mo.fi, NM_EV_OML_DOWN, NULL); osmo_fsm_inst_dispatch(trx->mo.fi, NM_EV_OML_DOWN, NULL); for (tn = 0; tn < TRX_NR_TS; tn++) { ts = &trx->ts[tn]; osmo_fsm_inst_dispatch(ts->mo.fi, NM_EV_OML_DOWN, NULL); } } osmo_fsm_inst_dispatch(bts->mo.fi, NM_EV_OML_DOWN, NULL); osmo_fsm_inst_dispatch(bts->gprs.cell.mo.fi, NM_EV_OML_DOWN, NULL); osmo_fsm_inst_dispatch(bts->site_mgr->mo.fi, NM_EV_OML_DOWN, NULL); osmo_fsm_inst_dispatch(bts->site_mgr->gprs.nse.mo.fi, NM_EV_OML_DOWN, NULL); for (i = 0; i < ARRAY_SIZE(bts->site_mgr->gprs.nsvc); i++) osmo_fsm_inst_dispatch(bts->site_mgr->gprs.nsvc[i].mo.fi, NM_EV_OML_DOWN, NULL); bts->ip_access.flags = 0; if (bts->model->features_get_reported) { /* Reset the feature vector */ memset(bts->_features_data, 0, sizeof(bts->_features_data)); bts->features_known = false; } /* * 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(rate_ctr_group_get_ctr(bsc_gsmnet->bsc_ctrs, 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; struct e1inp_ts *sign_ts = e1inp_line_ipa_oml_ts(line); bts = find_bts_by_unitid(bsc_gsmnet, dev->site_id, dev->bts_id); if (!bts) { ipaccess_sign_link_reject(dev, sign_ts); return NULL; } DEBUGP(DLINP, "%s: Identified BTS %u/%u/%u\n", e1inp_signtype_name(type), dev->site_id, dev->bts_id, dev->trx_id); /* Check if this BTS has a valid configuration. If not we will drop it * immediately. */ if (gsm_bts_check_cfg(bts) != 0) { LOGP(DLINP, LOGL_NOTICE, "(bts=%u) BTS config invalid, dropping BTS!\n", bts->nr); ipaccess_drop_oml_deferred(bts); return NULL; } 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(sign_ts, E1INP_SIGN_OML, bts->c0, bts->oml_tei, 0); rc = osmo_clock_gettime(CLOCK_MONOTONIC, &tp); bts->updowntime = (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(osmo_stat_item_group_get_item(bts->bts_statg, BTS_STAT_OML_CONNECTED), 1); /* Create link for E1INP_SIGN_OSMO */ //SAPI must be 0, no IPAC_PROTO_EXT_PCU, see ipaccess_bts_read_cb bts->osmo_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_OSMO, bts->c0, IPAC_PROTO_OSMO, 0); 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 = e1inp_line_ipa_rsl_ts(line, dev->trx_id); e1inp_ts_config_sign(ts, line); sign_link = trx->rsl_link_primary = e1inp_sign_link_create(ts, E1INP_SIGN_RSL, trx, trx->rsl_tei_primary, 0); trx->rsl_link_primary->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(osmo_stat_item_group_get_item(bts->bts_statg, 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 = e1inp_line_ipa_oml_ts(line); 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; case E1INP_SIGN_OSMO: ret = abis_osmo_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); } static void enc_meas_proc_params(struct msgb *msg, uint8_t ptype, const struct gsm_power_ctrl_meas_params *mp) { struct ipac_preproc_ave_cfg *ave_cfg; uint8_t *ie_len; /* No averaging => no Measurement Averaging parameters */ if (mp->algo == GSM_PWR_CTRL_MEAS_AVG_ALGO_NONE) return; /* (TLV) Measurement Averaging parameters for RxLev/RxQual */ ie_len = msgb_tl_put(msg, RSL_IPAC_EIE_MEAS_AVG_CFG); ave_cfg = (struct ipac_preproc_ave_cfg *) msgb_put(msg, sizeof(*ave_cfg)); ave_cfg->param_id = ptype & 0x03; /* H_REQAVE and H_REQT */ ave_cfg->h_reqave = mp->h_reqave & 0x1f; ave_cfg->h_reqt = mp->h_reqt & 0x1f; /* Averaging method and parameters */ ave_cfg->ave_method = (mp->algo - 1) & 0x07; switch (mp->algo) { case GSM_PWR_CTRL_MEAS_AVG_ALGO_OSMO_EWMA: msgb_v_put(msg, mp->ewma.alpha); break; case GSM_PWR_CTRL_MEAS_AVG_ALGO_WEIGHTED: case GSM_PWR_CTRL_MEAS_AVG_ALGO_MOD_MEDIAN: /* FIXME: unknown format */ break; case GSM_PWR_CTRL_MEAS_AVG_ALGO_UNWEIGHTED: case GSM_PWR_CTRL_MEAS_AVG_ALGO_NONE: /* No parameters here */ break; } /* Update length part of the containing IE */ *ie_len = msg->tail - (ie_len + 1); } static void enc_power_params(struct msgb *msg, const struct gsm_power_ctrl_params *cp) { struct ipac_preproc_pc_comp *thresh_comp; struct ipac_preproc_pc_thresh *thresh; /* These parameters are valid for dynamic mode only */ OSMO_ASSERT(cp->mode == GSM_PWR_CTRL_MODE_DYN_BTS); /* (TLV) Measurement Averaging Configure */ enc_meas_proc_params(msg, IPAC_RXQUAL_AVE, &cp->rxqual_meas); enc_meas_proc_params(msg, IPAC_RXLEV_AVE, &cp->rxlev_meas); /* (TV) Thresholds: {L,U}_RXLEV_XX_P and {L,U}_RXQUAL_XX_P */ if (cp->dir == GSM_PWR_CTRL_DIR_UL) msgb_v_put(msg, RSL_IPAC_EIE_MS_PWR_CTL); else msgb_v_put(msg, RSL_IPAC_EIE_BS_PWR_CTL); thresh = (struct ipac_preproc_pc_thresh *) msgb_put(msg, sizeof(*thresh)); /* {L,U}_RXLEV_XX_P (see 3GPP TS 45.008, A.3.2.1, a & b) */ thresh->l_rxlev = cp->rxlev_meas.lower_thresh & 0x3f; thresh->u_rxlev = cp->rxlev_meas.upper_thresh & 0x3f; /* {L,U}_RXQUAL_XX_P (see 3GPP TS 45.008, A.3.2.1, c & d) */ thresh->l_rxqual = cp->rxqual_meas.lower_thresh & 0x07; thresh->u_rxqual = cp->rxqual_meas.upper_thresh & 0x07; /* (TV) PC Threshold Comparators */ msgb_v_put(msg, RSL_IPAC_EIE_PC_THRESH_COMP); thresh_comp = (struct ipac_preproc_pc_comp *) msgb_put(msg, sizeof(*thresh_comp)); /* RxLev: P1, N1, P2, N2 (see 3GPP TS 45.008, A.3.2.1, a & b) */ thresh_comp->p1 = cp->rxlev_meas.lower_cmp_p & 0x1f; thresh_comp->n1 = cp->rxlev_meas.lower_cmp_n & 0x1f; thresh_comp->p2 = cp->rxlev_meas.upper_cmp_p & 0x1f; thresh_comp->n2 = cp->rxlev_meas.upper_cmp_n & 0x1f; /* RxQual: P3, N3, P4, N4 (see 3GPP TS 45.008, A.3.2.1, c & d) */ thresh_comp->p3 = cp->rxqual_meas.lower_cmp_p & 0x1f; thresh_comp->n3 = cp->rxqual_meas.lower_cmp_n & 0x1f; thresh_comp->p4 = cp->rxqual_meas.upper_cmp_p & 0x1f; thresh_comp->n4 = cp->rxqual_meas.upper_cmp_n & 0x1f; /* Minimum interval between power level changes (P_CON_INTERVAL) */ thresh_comp->pc_interval = cp->ctrl_interval; /* Change step limitations: POWER_{INC,RED}_STEP_SIZE */ thresh_comp->inc_step_size = cp->inc_step_size_db & 0x0f; thresh_comp->red_step_size = cp->red_step_size_db & 0x0f; } void osmobts_enc_power_params_osmo_ext(struct msgb *msg, const struct gsm_power_ctrl_params *cp); static void add_power_params_ie(struct msgb *msg, enum abis_rsl_ie iei, const struct gsm_bts_trx *trx, const struct gsm_power_ctrl_params *cp) { uint8_t *ie_len = msgb_tl_put(msg, iei); uint8_t msg_len = msgb_length(msg); enc_power_params(msg, cp); if (iei == RSL_IE_MS_POWER_PARAM && is_osmobts(trx->bts)) osmobts_enc_power_params_osmo_ext(msg, cp); *ie_len = msgb_length(msg) - msg_len; } static int power_ctrl_send_def_params(const struct gsm_bts_trx *trx) { const struct gsm_power_ctrl_params *ms_power_ctrl = &trx->bts->ms_power_ctrl; const struct gsm_power_ctrl_params *bs_power_ctrl = &trx->bts->bs_power_ctrl; struct abis_rsl_common_hdr *ch; struct msgb *msg; /* Sending this message does not make sense if neither MS Power control * nor BS Power control is to be performed by the BTS itself ('dyn-bts'). */ if (ms_power_ctrl->mode != GSM_PWR_CTRL_MODE_DYN_BTS && bs_power_ctrl->mode != GSM_PWR_CTRL_MODE_DYN_BTS) return 0; msg = rsl_msgb_alloc(); if (msg == NULL) return -ENOMEM; ch = (struct abis_rsl_common_hdr *) msgb_put(msg, sizeof(*ch)); ch->msg_discr = ABIS_RSL_MDISC_TRX; ch->msg_type = RSL_MT_IPAC_MEAS_PREPROC_DFT; /* BS/MS Power IEs (to be re-defined in channel specific messages) */ msgb_tv_put(msg, RSL_IE_MS_POWER, 0); /* dummy value */ msgb_tv_put(msg, RSL_IE_BS_POWER, 0); /* dummy value */ /* MS/BS Power Parameters IEs */ if (ms_power_ctrl->mode == GSM_PWR_CTRL_MODE_DYN_BTS) add_power_params_ie(msg, RSL_IE_MS_POWER_PARAM, trx, ms_power_ctrl); if (bs_power_ctrl->mode == GSM_PWR_CTRL_MODE_DYN_BTS) add_power_params_ie(msg, RSL_IE_BS_POWER_PARAM, trx, bs_power_ctrl); msg->dst = trx->rsl_link_primary; return abis_rsl_sendmsg(msg); } static int power_ctrl_enc_rsl_params(struct msgb *msg, const struct gsm_power_ctrl_params *cp) { /* We send everything in "Measurement Pre-processing Defaults" */ return 0; }