/* Osmocom Visitor Location Register (VLR): Location Update FSMs */ /* (C) 2016 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 <osmocom/core/fsm.h> #include <osmocom/gsm/gsm48.h> #include <osmocom/vlr/vlr.h> #include "vlr_core.h" #include "vlr_auth_fsm.h" #include "vlr_lu_fsm.h" #include "vlr_sgs_fsm.h" #define S(x) (1 << (x)) #define LU_TIMEOUT_LONG 30 enum vlr_fsm_result { VLR_FSM_RESULT_NONE, VLR_FSM_RESULT_SUCCESS, VLR_FSM_RESULT_FAILURE, }; /*********************************************************************** * Update_HLR_VLR, TS 23.012 Chapter 4.1.2.4 ***********************************************************************/ enum upd_hlr_vlr_state { UPD_HLR_VLR_S_INIT, UPD_HLR_VLR_S_WAIT_FOR_DATA, UPD_HLR_VLR_S_DONE, }; enum upd_hlr_vlr_evt { UPD_HLR_VLR_E_START, UPD_HLR_VLR_E_INS_SUB_DATA, UPD_HLR_VLR_E_ACT_TRACE_MODE, UPD_HLR_VLR_E_FW_CHECK_SS_IND, UPD_HLR_VLR_E_UPD_LOC_ACK, UPD_HLR_VLR_E_UPD_LOC_NACK, }; static const struct value_string upd_hlr_vlr_event_names[] = { OSMO_VALUE_STRING(UPD_HLR_VLR_E_START), OSMO_VALUE_STRING(UPD_HLR_VLR_E_INS_SUB_DATA), OSMO_VALUE_STRING(UPD_HLR_VLR_E_ACT_TRACE_MODE), OSMO_VALUE_STRING(UPD_HLR_VLR_E_FW_CHECK_SS_IND), OSMO_VALUE_STRING(UPD_HLR_VLR_E_UPD_LOC_ACK), OSMO_VALUE_STRING(UPD_HLR_VLR_E_UPD_LOC_NACK), { 0, NULL } }; static inline struct vlr_subscr *upd_hlr_vlr_fi_priv(struct osmo_fsm_inst *fi); static void upd_hlr_vlr_fsm_init(struct osmo_fsm_inst *fi, uint32_t event, void *data) { struct vlr_subscr *vsub = upd_hlr_vlr_fi_priv(fi); int rc; OSMO_ASSERT(event == UPD_HLR_VLR_E_START); /* Send UpdateLocation to HLR */ rc = vlr_subscr_req_lu(vsub); if (rc < 0) LOGPFSML(fi, LOGL_ERROR, "Failed to send UpdateLocation to HLR\n"); osmo_fsm_inst_state_chg(fi, UPD_HLR_VLR_S_WAIT_FOR_DATA, LU_TIMEOUT_LONG, 0); } static void upd_hlr_vlr_fsm_wait_data(struct osmo_fsm_inst *fi, uint32_t event, void *data) { struct vlr_subscr *vsub = upd_hlr_vlr_fi_priv(fi); switch (event) { case UPD_HLR_VLR_E_INS_SUB_DATA: /* FIXME: Insert_Subscr_Data_VLR */ break; case UPD_HLR_VLR_E_ACT_TRACE_MODE: /* TODO: Activate_Tracing_VLR */ break; case UPD_HLR_VLR_E_FW_CHECK_SS_IND: /* TODO: Forward Check SS Ind to MSC */ break; case UPD_HLR_VLR_E_UPD_LOC_ACK: /* Inside Update_HLR_VLR after UpdateLocationAck */ vsub->sub_dataconf_by_hlr_ind = true; vsub->loc_conf_in_hlr_ind = true; osmo_fsm_inst_state_chg(fi, UPD_HLR_VLR_S_DONE, 0, 0); osmo_fsm_inst_term(fi, OSMO_FSM_TERM_REGULAR, NULL); break; case UPD_HLR_VLR_E_UPD_LOC_NACK: /* Inside Update_HLR_VLR after UpdateLocationNack */ /* TODO: Check_User_Error_In_Serving_Network_Entity */ vsub->sub_dataconf_by_hlr_ind = false; vsub->loc_conf_in_hlr_ind = false; osmo_fsm_inst_state_chg(fi, UPD_HLR_VLR_S_DONE, 0, 0); /* Data is a pointer to a gsm48_gmm_cause which we * simply pass through */ osmo_fsm_inst_term(fi, OSMO_FSM_TERM_REGULAR, data); break; } } static const struct osmo_fsm_state upd_hlr_vlr_states[] = { [UPD_HLR_VLR_S_INIT] = { .in_event_mask = S(UPD_HLR_VLR_E_START), .out_state_mask = S(UPD_HLR_VLR_S_WAIT_FOR_DATA), .name = OSMO_STRINGIFY(UPD_HLR_VLR_S_INIT), .action = upd_hlr_vlr_fsm_init, }, [UPD_HLR_VLR_S_WAIT_FOR_DATA] = { .in_event_mask = S(UPD_HLR_VLR_E_INS_SUB_DATA) | S(UPD_HLR_VLR_E_ACT_TRACE_MODE) | S(UPD_HLR_VLR_E_FW_CHECK_SS_IND) | S(UPD_HLR_VLR_E_UPD_LOC_ACK) | S(UPD_HLR_VLR_E_UPD_LOC_NACK), .out_state_mask = S(UPD_HLR_VLR_S_DONE), .name = OSMO_STRINGIFY(UPD_HLR_VLR_S_WAIT_FOR_DATA), .action = upd_hlr_vlr_fsm_wait_data, }, [UPD_HLR_VLR_S_DONE] = { .name = OSMO_STRINGIFY(UPD_HLR_VLR_S_DONE), }, }; static struct osmo_fsm upd_hlr_vlr_fsm = { .name = "upd_hlr_vlr_fsm", .states = upd_hlr_vlr_states, .num_states = ARRAY_SIZE(upd_hlr_vlr_states), .allstate_event_mask = 0, .allstate_action = NULL, .log_subsys = DLGLOBAL, .event_names = upd_hlr_vlr_event_names, }; static inline struct vlr_subscr *upd_hlr_vlr_fi_priv(struct osmo_fsm_inst *fi) { OSMO_ASSERT(fi->fsm == &upd_hlr_vlr_fsm); return (struct vlr_subscr*)fi->priv; } struct osmo_fsm_inst * upd_hlr_vlr_proc_start(struct osmo_fsm_inst *parent, struct vlr_subscr *vsub, uint32_t parent_event) { struct osmo_fsm_inst *fi; fi = osmo_fsm_inst_alloc_child(&upd_hlr_vlr_fsm, parent, parent_event); if (!fi) return NULL; fi->priv = vsub; osmo_fsm_inst_dispatch(fi, UPD_HLR_VLR_E_START, NULL); return fi; } /*********************************************************************** * Subscriber_Present_VLR, TS 29.002 Chapter 25.10.1 ***********************************************************************/ enum sub_pres_vlr_state { SUB_PRES_VLR_S_INIT, SUB_PRES_VLR_S_WAIT_FOR_HLR, SUB_PRES_VLR_S_DONE, }; enum sub_pres_vlr_event { SUB_PRES_VLR_E_START, SUB_PRES_VLR_E_READY_SM_CNF, SUB_PRES_VLR_E_READY_SM_ERR, }; static const struct value_string sub_pres_vlr_event_names[] = { OSMO_VALUE_STRING(SUB_PRES_VLR_E_START), OSMO_VALUE_STRING(SUB_PRES_VLR_E_READY_SM_CNF), OSMO_VALUE_STRING(SUB_PRES_VLR_E_READY_SM_ERR), { 0, NULL } }; static inline struct vlr_subscr *sub_pres_vlr_fi_priv(struct osmo_fsm_inst *fi); static void sub_pres_vlr_fsm_init(struct osmo_fsm_inst *fi, uint32_t event, void *data) { struct vlr_subscr *vsub = sub_pres_vlr_fi_priv(fi); OSMO_ASSERT(event == SUB_PRES_VLR_E_START); if (!vsub->ms_not_reachable_flag) { osmo_fsm_inst_state_chg(fi, SUB_PRES_VLR_S_DONE, 0, 0); osmo_fsm_inst_term(fi, OSMO_FSM_TERM_REGULAR, NULL); return; } /* FIXME: Send READY_FOR_SM via GSUP */ osmo_fsm_inst_state_chg(fi, SUB_PRES_VLR_S_WAIT_FOR_HLR, LU_TIMEOUT_LONG, 0); } static void sub_pres_vlr_fsm_wait_hlr(struct osmo_fsm_inst *fi, uint32_t event, void *data) { struct vlr_subscr *vsub = sub_pres_vlr_fi_priv(fi); switch (event) { case SUB_PRES_VLR_E_READY_SM_CNF: vsub->ms_not_reachable_flag = false; break; case SUB_PRES_VLR_E_READY_SM_ERR: break; } osmo_fsm_inst_state_chg(fi, SUB_PRES_VLR_S_DONE, 0, 0); osmo_fsm_inst_term(fi, OSMO_FSM_TERM_REGULAR, NULL); } static const struct osmo_fsm_state sub_pres_vlr_states[] = { [SUB_PRES_VLR_S_INIT] = { .in_event_mask = S(SUB_PRES_VLR_E_START), .out_state_mask = S(SUB_PRES_VLR_S_WAIT_FOR_HLR) | S(SUB_PRES_VLR_S_DONE), .name = OSMO_STRINGIFY(SUB_PRES_VLR_S_INIT), .action = sub_pres_vlr_fsm_init, }, [SUB_PRES_VLR_S_WAIT_FOR_HLR] = { .in_event_mask = S(SUB_PRES_VLR_E_READY_SM_CNF) | S(SUB_PRES_VLR_E_READY_SM_ERR), .out_state_mask = S(SUB_PRES_VLR_S_DONE), .name = OSMO_STRINGIFY(SUB_PRES_VLR_S_WAIT_FOR_HLR), .action = sub_pres_vlr_fsm_wait_hlr, }, [SUB_PRES_VLR_S_DONE] = { .name = OSMO_STRINGIFY(SUB_PRES_VLR_S_DONE), }, }; static struct osmo_fsm sub_pres_vlr_fsm = { .name = "sub_pres_vlr_fsm", .states = sub_pres_vlr_states, .num_states = ARRAY_SIZE(sub_pres_vlr_states), .allstate_event_mask = 0, .allstate_action = NULL, .log_subsys = DLGLOBAL, .event_names = sub_pres_vlr_event_names, }; static inline struct vlr_subscr *sub_pres_vlr_fi_priv(struct osmo_fsm_inst *fi) { OSMO_ASSERT(fi->fsm == &sub_pres_vlr_fsm); return (struct vlr_subscr*)fi->priv; } /* THIS IS CURRENTLY DEAD CODE, SINCE WE NEVER SET vsub->ms_not_reachable_flag = true. * * Note that the start event is dispatched right away, so in case the FSM immediately concludes from that * event, the created FSM struct may no longer be valid as it already deallocated again, and it may * furthermore already have invoked the parent FSM instance's deallocation as well. Hence, instead of * returning, store the created FSM instance address in *fi_p before dispatching the event. It is thus * possible to store the instance's pointer in a parent FSM instance without running danger of using * already freed memory. */ void sub_pres_vlr_fsm_start(struct osmo_fsm_inst **fi_p, struct osmo_fsm_inst *parent, struct vlr_subscr *vsub, uint32_t term_event) { struct osmo_fsm_inst *fi; OSMO_ASSERT(fi_p); fi = osmo_fsm_inst_alloc_child(&sub_pres_vlr_fsm, parent, term_event); *fi_p = fi; if (!fi) return; fi->priv = vsub; osmo_fsm_inst_dispatch(fi, SUB_PRES_VLR_E_START, NULL); } /*********************************************************************** * Location_Update_Completion_VLR, TS 23.012 Chapter 4.1.2.3 ***********************************************************************/ enum lu_compl_vlr_state { LU_COMPL_VLR_S_INIT, LU_COMPL_VLR_S_WAIT_SUB_PRES, LU_COMPL_VLR_S_WAIT_IMEI, LU_COMPL_VLR_S_WAIT_IMEI_TMSI, LU_COMPL_VLR_S_WAIT_TMSI_CNF, LU_COMPL_VLR_S_DONE, }; enum lu_compl_vlr_event { LU_COMPL_VLR_E_START, LU_COMPL_VLR_E_SUB_PRES_COMPL, LU_COMPL_VLR_E_IMEI_CHECK_ACK, LU_COMPL_VLR_E_IMEI_CHECK_NACK, LU_COMPL_VLR_E_NEW_TMSI_ACK, }; static const struct value_string lu_compl_vlr_event_names[] = { OSMO_VALUE_STRING(LU_COMPL_VLR_E_START), OSMO_VALUE_STRING(LU_COMPL_VLR_E_SUB_PRES_COMPL), OSMO_VALUE_STRING(LU_COMPL_VLR_E_IMEI_CHECK_ACK), OSMO_VALUE_STRING(LU_COMPL_VLR_E_IMEI_CHECK_NACK), OSMO_VALUE_STRING(LU_COMPL_VLR_E_NEW_TMSI_ACK), { 0, NULL } }; struct lu_compl_vlr_priv { struct vlr_subscr *vsub; void *msc_conn_ref; struct osmo_fsm_inst *sub_pres_vlr_fsm; uint32_t parent_event_success; uint32_t parent_event_failure; void *parent_event_data; enum vlr_fsm_result result; uint8_t cause; bool assign_tmsi; enum vlr_lu_type lu_type; }; static inline struct lu_compl_vlr_priv *lu_compl_vlr_fi_priv(struct osmo_fsm_inst *fi); static void _vlr_lu_compl_fsm_done(struct osmo_fsm_inst *fi, enum vlr_fsm_result result, uint8_t cause) { struct lu_compl_vlr_priv *lcvp = lu_compl_vlr_fi_priv(fi); lcvp->result = result; lcvp->cause = cause; osmo_fsm_inst_state_chg(fi, LU_COMPL_VLR_S_DONE, 0, 0); } static void vlr_lu_compl_fsm_success(struct osmo_fsm_inst *fi) { struct lu_compl_vlr_priv *lcvp = lu_compl_vlr_fi_priv(fi); struct vlr_subscr *vsub = lcvp->vsub; if (!vsub->lu_complete) { vsub->lu_complete = true; /* Balanced by vlr_subscr_expire() */ vlr_subscr_get(vsub, VSUB_USE_ATTACHED); } _vlr_lu_compl_fsm_done(fi, VLR_FSM_RESULT_SUCCESS, 0); vlr_sgs_fsm_update_id(vsub); } static void vlr_lu_compl_fsm_dispatch_result(struct osmo_fsm_inst *fi, uint32_t prev_state) { struct lu_compl_vlr_priv *lcvp = lu_compl_vlr_fi_priv(fi); if (!fi->proc.parent) { LOGPFSML(fi, LOGL_ERROR, "No parent FSM\n"); return; } osmo_fsm_inst_dispatch(fi->proc.parent, (lcvp->result == VLR_FSM_RESULT_SUCCESS) ? lcvp->parent_event_success : lcvp->parent_event_failure, &lcvp->cause); } static void lu_compl_vlr_init(struct osmo_fsm_inst *fi, uint32_t event, void *data) { struct lu_compl_vlr_priv *lcvp = lu_compl_vlr_fi_priv(fi); struct vlr_subscr *vsub = lcvp->vsub; struct vlr_instance *vlr; OSMO_ASSERT(vsub); vlr = vsub->vlr; OSMO_ASSERT(vlr); OSMO_ASSERT(event == LU_COMPL_VLR_E_START); /* TODO: National Roaming restrictions? */ /* TODO: Roaming restriction due to unsupported feature in subscriber * data? */ /* TODO: Regional subscription restriction? */ /* TODO: Administrative restriction of subscribres' access feature? */ /* TODO: AccessRestrictuionData parameter available? */ /* TODO: AccessRestrictionData permits RAT? */ /* Node 1 */ /* TODO: Autonomous CSG supported in VPLMN and allowed by HPLMN? */ /* TODO: Hybrid Cel / CSG Cell */ /* Node 2 */ vsub->la_allowed = true; vsub->imsi_detached_flag = false; /* Start Subscriber_Present_VLR Procedure */ osmo_fsm_inst_state_chg(fi, LU_COMPL_VLR_S_WAIT_SUB_PRES, LU_TIMEOUT_LONG, 0); /* If ms_not_reachable_flag == false, the sub_pres_vlr_fsm will anyway terminate straight away and dispatch * LU_COMPL_VLR_E_SUB_PRES_COMPL to this fi, so we might as well skip that dance here and save some logging. */ if (vsub->ms_not_reachable_flag) sub_pres_vlr_fsm_start(&lcvp->sub_pres_vlr_fsm, fi, vsub, LU_COMPL_VLR_E_SUB_PRES_COMPL); else osmo_fsm_inst_dispatch(fi, LU_COMPL_VLR_E_SUB_PRES_COMPL, NULL); } static void lu_compl_vlr_new_tmsi(struct osmo_fsm_inst *fi) { struct lu_compl_vlr_priv *lcvp = lu_compl_vlr_fi_priv(fi); struct vlr_subscr *vsub = lcvp->vsub; struct vlr_instance *vlr = vsub->vlr; LOGPFSM(fi, "%s()\n", __func__); if (vlr_subscr_alloc_tmsi(vsub)) { _vlr_lu_compl_fsm_done(fi, VLR_FSM_RESULT_FAILURE, GSM48_REJECT_SRV_OPT_TMP_OUT_OF_ORDER); return; } osmo_fsm_inst_state_chg(fi, LU_COMPL_VLR_S_WAIT_TMSI_CNF, vlr_timer_secs(vlr, 3250), 3250); vlr->ops.tx_lu_acc(lcvp->msc_conn_ref, vsub->tmsi_new, lcvp->lu_type); } /* After completion of Subscriber_Present_VLR */ static void lu_compl_vlr_wait_subscr_pres(struct osmo_fsm_inst *fi, uint32_t event, void *data) { struct lu_compl_vlr_priv *lcvp = lu_compl_vlr_fi_priv(fi); struct vlr_subscr *vsub = lcvp->vsub; struct vlr_instance *vlr = vsub->vlr; OSMO_ASSERT(event == LU_COMPL_VLR_E_SUB_PRES_COMPL); lcvp->sub_pres_vlr_fsm = NULL; /* TODO: Trace_Subscriber_Activity_VLR */ /* If imeisv_early is enabled: IMEI already retrieved and checked (vlr_loc_upd_node1_pre), don't do it again. */ if (vlr->cfg.check_imei_rqd && !vlr->cfg.retrieve_imeisv_early) { /* Check IMEI VLR */ osmo_fsm_inst_state_chg(fi, lcvp->assign_tmsi ? LU_COMPL_VLR_S_WAIT_IMEI_TMSI : LU_COMPL_VLR_S_WAIT_IMEI, vlr_timer_secs(vlr, 3270), 3270); vlr->ops.tx_id_req(lcvp->msc_conn_ref, GSM_MI_TYPE_IMEI); return; } /* Do we need to allocate a TMSI? */ if (lcvp->assign_tmsi) { lu_compl_vlr_new_tmsi(fi); return; } /* else, any previously used TMSI is now invalid. */ vsub->tmsi = GSM_RESERVED_TMSI; /* Location Updating Accept */ vlr->ops.tx_lu_acc(lcvp->msc_conn_ref, GSM_RESERVED_TMSI, lcvp->lu_type); vlr_lu_compl_fsm_success(fi); } /* Waiting for completion of CHECK_IMEI_VLR */ static void lu_compl_vlr_wait_imei(struct osmo_fsm_inst *fi, uint32_t event, void *data) { struct lu_compl_vlr_priv *lcvp = lu_compl_vlr_fi_priv(fi); struct vlr_subscr *vsub = lcvp->vsub; struct vlr_instance *vlr = vsub->vlr; switch (event) { case LU_COMPL_VLR_E_IMEI_CHECK_ACK: if (!vsub->imei[0]) { /* Abort: Do nothing */ _vlr_lu_compl_fsm_done(fi, VLR_FSM_RESULT_FAILURE, GSM48_REJECT_PROTOCOL_ERROR); return; } /* Pass */ break; case LU_COMPL_VLR_E_IMEI_CHECK_NACK: _vlr_lu_compl_fsm_done(fi, VLR_FSM_RESULT_FAILURE, GSM48_REJECT_ILLEGAL_ME); /* FIXME: IMEI Check Fail to VLR Application (Detach IMSI VLR) */ return; } /* IMEI is available. Allocate TMSI if needed. */ if (lcvp->assign_tmsi) { if (fi->state != LU_COMPL_VLR_S_WAIT_IMEI_TMSI) LOGPFSML(fi, LOGL_ERROR, "TMSI required, expected to be in state" " LU_COMPL_VLR_S_WAIT_IMEI_TMSI," " am in %s instead\n", osmo_fsm_state_name(fi->fsm, fi->state)); /* Logged an error, continue anyway. */ lu_compl_vlr_new_tmsi(fi); /* Wait for TMSI ack */ return; } /* else, any previously used TMSI is now invalid. */ vsub->tmsi = GSM_RESERVED_TMSI; /* No TMSI needed, accept now. */ vlr->ops.tx_lu_acc(lcvp->msc_conn_ref, GSM_RESERVED_TMSI, lcvp->lu_type); vlr_lu_compl_fsm_success(fi); } static inline struct lu_compl_vlr_priv *lu_compl_vlr_fi_priv(struct osmo_fsm_inst *fi); /* Waiting for TMSI confirmation */ static void lu_compl_vlr_wait_tmsi(struct osmo_fsm_inst *fi, uint32_t event, void *data) { struct lu_compl_vlr_priv *lcvp = lu_compl_vlr_fi_priv(fi); struct vlr_subscr *vsub = lcvp->vsub; OSMO_ASSERT(event == LU_COMPL_VLR_E_NEW_TMSI_ACK); if (!vsub || vsub->tmsi_new == GSM_RESERVED_TMSI) { LOGPFSML(fi, LOGL_ERROR, "TMSI Realloc Compl implies that" " the subscriber has a new TMSI allocated, but" " the new TMSI is unset.\n"); _vlr_lu_compl_fsm_done(fi, VLR_FSM_RESULT_FAILURE, GSM48_REJECT_NETWORK_FAILURE); return; } vsub->tmsi = vsub->tmsi_new; vsub->tmsi_new = GSM_RESERVED_TMSI; vsub->vlr->ops.subscr_update(vsub); vlr_lu_compl_fsm_success(fi); } static const struct osmo_fsm_state lu_compl_vlr_states[] = { [LU_COMPL_VLR_S_INIT] = { .in_event_mask = S(LU_COMPL_VLR_E_START), .out_state_mask = S(LU_COMPL_VLR_S_DONE) | S(LU_COMPL_VLR_S_WAIT_SUB_PRES), .name = OSMO_STRINGIFY(LU_COMPL_VLR_S_INIT), .action = lu_compl_vlr_init, }, [LU_COMPL_VLR_S_WAIT_SUB_PRES] = { .in_event_mask = S(LU_COMPL_VLR_E_SUB_PRES_COMPL), .out_state_mask = S(LU_COMPL_VLR_S_WAIT_IMEI) | S(LU_COMPL_VLR_S_WAIT_IMEI_TMSI) | S(LU_COMPL_VLR_S_WAIT_TMSI_CNF) | S(LU_COMPL_VLR_S_DONE), .name = OSMO_STRINGIFY(LU_COMPL_VLR_S_WAIT_SUB_PRES), .action = lu_compl_vlr_wait_subscr_pres, }, [LU_COMPL_VLR_S_WAIT_IMEI] = { .in_event_mask = S(LU_COMPL_VLR_E_IMEI_CHECK_ACK) | S(LU_COMPL_VLR_E_IMEI_CHECK_NACK), .out_state_mask = S(LU_COMPL_VLR_S_DONE), .name = OSMO_STRINGIFY(LU_COMPL_VLR_S_WAIT_IMEI), .action = lu_compl_vlr_wait_imei, }, [LU_COMPL_VLR_S_WAIT_IMEI_TMSI] = { .in_event_mask = S(LU_COMPL_VLR_E_IMEI_CHECK_ACK) | S(LU_COMPL_VLR_E_IMEI_CHECK_NACK), .out_state_mask = S(LU_COMPL_VLR_S_DONE) | S(LU_COMPL_VLR_S_WAIT_TMSI_CNF), .name = OSMO_STRINGIFY(LU_COMPL_VLR_S_WAIT_IMEI_TMSI), .action = lu_compl_vlr_wait_imei, }, [LU_COMPL_VLR_S_WAIT_TMSI_CNF] = { .in_event_mask = S(LU_COMPL_VLR_E_NEW_TMSI_ACK), .out_state_mask = S(LU_COMPL_VLR_S_DONE), .name = OSMO_STRINGIFY(LU_COMPL_VLR_S_WAIT_TMSI_CNF), .action = lu_compl_vlr_wait_tmsi, }, [LU_COMPL_VLR_S_DONE] = { .name = OSMO_STRINGIFY(LU_COMPL_VLR_S_DONE), .onenter = vlr_lu_compl_fsm_dispatch_result, }, }; static struct osmo_fsm lu_compl_vlr_fsm = { .name = "lu_compl_vlr_fsm", .states = lu_compl_vlr_states, .num_states = ARRAY_SIZE(lu_compl_vlr_states), .allstate_event_mask = 0, .allstate_action = NULL, .log_subsys = DLGLOBAL, .event_names = lu_compl_vlr_event_names, }; static inline struct lu_compl_vlr_priv *lu_compl_vlr_fi_priv(struct osmo_fsm_inst *fi) { OSMO_ASSERT(fi->fsm == &lu_compl_vlr_fsm); return (struct lu_compl_vlr_priv*)fi->priv; } struct osmo_fsm_inst * lu_compl_vlr_proc_alloc(struct osmo_fsm_inst *parent, struct vlr_subscr *vsub, void *msc_conn_ref, uint32_t parent_event_success, uint32_t parent_event_failure, bool assign_tmsi, enum vlr_lu_type lu_type) { struct osmo_fsm_inst *fi; struct lu_compl_vlr_priv *lcvp; fi = osmo_fsm_inst_alloc_child(&lu_compl_vlr_fsm, parent, parent_event_failure); if (!fi) return NULL; lcvp = talloc_zero(fi, struct lu_compl_vlr_priv); lcvp->vsub = vsub; lcvp->msc_conn_ref = msc_conn_ref; lcvp->parent_event_success = parent_event_success; lcvp->parent_event_failure = parent_event_failure; lcvp->assign_tmsi = assign_tmsi; lcvp->lu_type = lu_type; fi->priv = lcvp; return fi; } /*********************************************************************** * Update_Location_Area_VLR, TS 23.012 Chapter 4.1.2.1 ***********************************************************************/ static const struct value_string fsm_lu_event_names[] = { OSMO_VALUE_STRING(VLR_ULA_E_UPDATE_LA), OSMO_VALUE_STRING(VLR_ULA_E_SEND_ID_ACK), OSMO_VALUE_STRING(VLR_ULA_E_SEND_ID_NACK), OSMO_VALUE_STRING(VLR_ULA_E_AUTH_SUCCESS), OSMO_VALUE_STRING(VLR_ULA_E_AUTH_NO_INFO), OSMO_VALUE_STRING(VLR_ULA_E_AUTH_FAILURE), OSMO_VALUE_STRING(VLR_ULA_E_CIPH_RES), OSMO_VALUE_STRING(VLR_ULA_E_ID_IMSI), OSMO_VALUE_STRING(VLR_ULA_E_ID_IMEI), OSMO_VALUE_STRING(VLR_ULA_E_ID_IMEISV), OSMO_VALUE_STRING(VLR_ULA_E_HLR_IMEI_ACK), OSMO_VALUE_STRING(VLR_ULA_E_HLR_IMEI_NACK), OSMO_VALUE_STRING(VLR_ULA_E_HLR_LU_RES), OSMO_VALUE_STRING(VLR_ULA_E_UPD_HLR_COMPL), OSMO_VALUE_STRING(VLR_ULA_E_LU_COMPL_SUCCESS), OSMO_VALUE_STRING(VLR_ULA_E_LU_COMPL_FAILURE), OSMO_VALUE_STRING(VLR_ULA_E_NEW_TMSI_ACK), { 0, NULL } }; struct lu_fsm_priv { struct vlr_instance *vlr; struct vlr_subscr *vsub; void *msc_conn_ref; struct osmo_fsm_inst *upd_hlr_vlr_fsm; struct osmo_fsm_inst *lu_compl_vlr_fsm; uint32_t parent_event_success; uint32_t parent_event_failure; void *parent_event_data; enum vlr_fsm_result result; uint8_t rej_cause; enum vlr_lu_type lu_type; bool lu_by_tmsi; char imsi[16]; uint32_t tmsi; struct osmo_location_area_id old_lai; struct osmo_location_area_id new_lai; bool authentication_required; /* is_ciphering_to_be_attempted: true when any A5/n > 0 are enabled. Ciphering is allowed, always attempt to get Auth Info from * the HLR. */ bool is_ciphering_to_be_attempted; /* is_ciphering_required: true when A5/0 is disabled. If we cannot get Auth Info from the HLR, reject the * subscriber. */ bool is_ciphering_required; uint8_t key_seq; bool is_r99; bool is_utran; bool assign_tmsi; }; /* Determine if given location area is served by this VLR */ static bool lai_in_this_vlr(struct vlr_instance *vlr, const struct osmo_location_area_id *lai) { /* TODO: VLR needs to keep a locally configured list of LAIs */ return true; } /* Return true when authentication should be attempted. */ static bool try_auth(struct lu_fsm_priv *lfp) { /* The cases where the authentication procedure should be used * are defined in 3GPP TS 33.102 */ /* For now we use a default value passed in to vlr_lu_fsm(). */ return lfp->authentication_required || (lfp->is_ciphering_to_be_attempted && !auth_try_reuse_tuple(lfp->vsub, lfp->key_seq)); } /* Return true when CipherModeCmd / SecurityModeCmd should be attempted. */ static bool is_cmc_smc_to_be_attempted(struct lu_fsm_priv *lfp) { /* UTRAN: always send SecModeCmd, even if ciphering is not required. * GERAN: avoid sending CiphModeCmd if ciphering is not required. */ return lfp->is_utran || lfp->is_ciphering_to_be_attempted; } /* Determine if a HLR Update is required */ static bool hlr_update_needed(struct vlr_subscr *vsub) { /* TODO: properly decide this, rather than always assuming we * need to update the HLR. */ return true; } static inline struct lu_fsm_priv *lu_fsm_fi_priv(struct osmo_fsm_inst *fi); static void lu_fsm_dispatch_result(struct osmo_fsm_inst *fi, uint32_t prev_state) { struct lu_fsm_priv *lfp = lu_fsm_fi_priv(fi); if (!fi->proc.parent) { LOGPFSML(fi, LOGL_ERROR, "No parent FSM\n"); return; } osmo_fsm_inst_dispatch(fi->proc.parent, (lfp->result == VLR_FSM_RESULT_SUCCESS) ? lfp->parent_event_success : lfp->parent_event_failure, lfp->parent_event_data); } static void _lu_fsm_done(struct osmo_fsm_inst *fi, enum vlr_fsm_result result) { struct lu_fsm_priv *lfp = lu_fsm_fi_priv(fi); lfp->result = result; osmo_fsm_inst_state_chg(fi, VLR_ULA_S_DONE, 0, 0); } static void lu_fsm_success(struct osmo_fsm_inst *fi) { _lu_fsm_done(fi, VLR_FSM_RESULT_SUCCESS); } static void lu_fsm_failure(struct osmo_fsm_inst *fi, enum gsm48_reject_value rej_cause) { struct lu_fsm_priv *lfp = lu_fsm_fi_priv(fi); lfp->vlr->ops.tx_lu_rej(lfp->msc_conn_ref, rej_cause ? : GSM48_REJECT_NETWORK_FAILURE, lfp->lu_type); _lu_fsm_done(fi, VLR_FSM_RESULT_FAILURE); } static void vlr_loc_upd_start_lu_compl_fsm(struct osmo_fsm_inst *fi) { struct lu_fsm_priv *lfp = lu_fsm_fi_priv(fi); lfp->lu_compl_vlr_fsm = lu_compl_vlr_proc_alloc(fi, lfp->vsub, lfp->msc_conn_ref, VLR_ULA_E_LU_COMPL_SUCCESS, VLR_ULA_E_LU_COMPL_FAILURE, lfp->assign_tmsi, lfp->lu_type); osmo_fsm_inst_dispatch(lfp->lu_compl_vlr_fsm, LU_COMPL_VLR_E_START, NULL); } static void lu_fsm_discard_lu_compl_fsm(struct osmo_fsm_inst *fi) { struct lu_fsm_priv *lfp = lu_fsm_fi_priv(fi); if (!lfp->lu_compl_vlr_fsm) return; osmo_fsm_inst_term(lfp->lu_compl_vlr_fsm, OSMO_FSM_TERM_PARENT, NULL); } /* 4.1.2.1 Node 4 */ static void vlr_loc_upd_node_4(struct osmo_fsm_inst *fi) { struct lu_fsm_priv *lfp = lu_fsm_fi_priv(fi); struct vlr_subscr *vsub = lfp->vsub; bool hlr_unknown = false; LOGPFSM(fi, "%s()\n", __func__); if (hlr_unknown) { /* FIXME: Delete subscriber record */ /* LU REJ: Roaming not allowed */ lu_fsm_failure(fi, GSM48_REJECT_ROAMING_NOT_ALLOWED); } else { /* Update_HLR_VLR */ osmo_fsm_inst_state_chg(fi, VLR_ULA_S_WAIT_HLR_UPD, LU_TIMEOUT_LONG, 0); lfp->upd_hlr_vlr_fsm = upd_hlr_vlr_proc_start(fi, vsub, VLR_ULA_E_UPD_HLR_COMPL); } } /* 4.1.2.1 Node B */ static void vlr_loc_upd_node_b(struct osmo_fsm_inst *fi) { LOGPFSM(fi, "%s()\n", __func__); /* OsmoHLR does not support PgA, neither stores the IMEISV, so we have no need to update the HLR * with either. TODO: depend on actual HLR configuration. See 3GPP TS 23.012 Release 14, process * Update_Location_Area_VLR (ULA_VLR2). */ if (0) { /* IMEISV or PgA to send */ vlr_loc_upd_node_4(fi); } else { /* Location_Update_Completion */ osmo_fsm_inst_state_chg(fi, VLR_ULA_S_WAIT_LU_COMPL, LU_TIMEOUT_LONG, 0); vlr_loc_upd_start_lu_compl_fsm(fi); } } /* Non-standard: after Ciphering Mode Complete (or no ciph required) */ static void vlr_loc_upd_post_ciph(struct osmo_fsm_inst *fi) { struct lu_fsm_priv *lfp = lu_fsm_fi_priv(fi); struct vlr_subscr *vsub = lfp->vsub; int rc; LOGPFSM(fi, "%s()\n", __func__); OSMO_ASSERT(vsub); rc = lfp->vlr->ops.tx_common_id(lfp->msc_conn_ref); if (rc) LOGPFSML(fi, LOGL_ERROR, "Error while sending Common ID (%d)\n", rc); vsub->conf_by_radio_contact_ind = true; /* Update LAI */ vsub->cgi.lai = lfp->new_lai; vsub->dormant_ind = false; vsub->cancel_loc_rx = false; if (hlr_update_needed(vsub)) { vlr_loc_upd_node_4(fi); } else { /* TODO: ADD Support */ /* TODO: Node A: PgA Support */ vlr_loc_upd_node_b(fi); } } /* 4.1.2.1 after Authentication successful (or no auth rqd) */ static void vlr_loc_upd_post_auth(struct osmo_fsm_inst *fi) { struct lu_fsm_priv *lfp = lu_fsm_fi_priv(fi); struct vlr_subscr *vsub = lfp->vsub; bool umts_aka; LOGPFSM(fi, "%s()\n", __func__); OSMO_ASSERT(vsub); /* Continue with ciphering, if enabled. * If auth/ciph is optional and the HLR returned no auth info, continue without ciphering. */ if (!is_cmc_smc_to_be_attempted(lfp) || (vsub->sec_ctx == VLR_SEC_CTX_NONE && !lfp->is_ciphering_required)) { vlr_loc_upd_post_ciph(fi); return; } if (!vsub->last_tuple) { LOGPFSML(fi, LOGL_ERROR, "No auth tuple available\n"); lu_fsm_failure(fi, GSM48_REJECT_NETWORK_FAILURE); return; } switch (vsub->sec_ctx) { case VLR_SEC_CTX_GSM: umts_aka = false; break; case VLR_SEC_CTX_UMTS: umts_aka = true; break; default: LOGPFSML(fi, LOGL_ERROR, "Cannot start ciphering, security context is not established\n"); lu_fsm_failure(fi, GSM48_REJECT_NETWORK_FAILURE); return; } if (vlr_set_ciph_mode(vsub->vlr, fi, lfp->msc_conn_ref, umts_aka, vsub->vlr->cfg.retrieve_imeisv_ciphered)) { LOGPFSML(fi, LOGL_ERROR, "Failed to send Ciphering Mode Command\n"); lu_fsm_failure(fi, GSM48_REJECT_NETWORK_FAILURE); return; } osmo_fsm_inst_state_chg(fi, VLR_ULA_S_WAIT_CIPH, LU_TIMEOUT_LONG, 0); } static void vlr_loc_upd_node1(struct osmo_fsm_inst *fi) { struct lu_fsm_priv *lfp = lu_fsm_fi_priv(fi); struct vlr_subscr *vsub = lfp->vsub; LOGPFSM(fi, "%s()\n", __func__); OSMO_ASSERT(vsub); if (try_auth(lfp)) { /* Authenticate_VLR */ osmo_fsm_inst_state_chg(fi, VLR_ULA_S_WAIT_AUTH, LU_TIMEOUT_LONG, 0); vsub->auth_fsm = auth_fsm_start(lfp->vsub, fi, VLR_ULA_E_AUTH_SUCCESS, VLR_ULA_E_AUTH_NO_INFO, VLR_ULA_E_AUTH_FAILURE, lfp->is_r99, lfp->is_utran); } else { /* no need for authentication */ vlr_loc_upd_post_auth(fi); } } static void vlr_loc_upd_node1_pre(struct osmo_fsm_inst *fi) { struct lu_fsm_priv *lfp = lu_fsm_fi_priv(fi); struct vlr_instance *vlr = lfp->vlr; LOGPFSM(fi, "%s()\n", __func__); if (vlr->cfg.check_imei_rqd && vlr->cfg.retrieve_imeisv_early) { osmo_fsm_inst_state_chg(fi, VLR_ULA_S_WAIT_HLR_CHECK_IMEI_EARLY, vlr_timer_secs(lfp->vlr, 3270), 3270); vlr_subscr_tx_req_check_imei(lfp->vsub); } else { vlr_loc_upd_node1(fi); } } /* End of Check_IMEI Procedure. Executed early (before the location update), so we can send the IMEI to the HLR even if * the MS would be rejected in LU. See the "Configuring the Subscribers Create on Demand Feature" section of the OsmoHLR * user manual for a detailed explanation of the use case. */ static void lu_fsm_wait_hlr_check_imei_early(struct osmo_fsm_inst *fi, uint32_t event, void *data) { switch (event) { case VLR_ULA_E_HLR_IMEI_ACK: vlr_loc_upd_node1(fi); break; case VLR_ULA_E_HLR_IMEI_NACK: lu_fsm_failure(fi, GSM48_REJECT_ILLEGAL_ME); break; default: OSMO_ASSERT(0); break; } } static void vlr_loc_upd_want_imsi(struct osmo_fsm_inst *fi) { struct lu_fsm_priv *lfp = lu_fsm_fi_priv(fi); struct vlr_instance *vlr = lfp->vlr; LOGPFSM(fi, "%s()\n", __func__); OSMO_ASSERT(lfp->vsub); /* Obtain_IMSI_VLR */ osmo_fsm_inst_state_chg(fi, VLR_ULA_S_WAIT_IMSI, vlr_timer_secs(vlr, 3270), 3270); vlr->ops.tx_id_req(lfp->msc_conn_ref, GSM_MI_TYPE_IMSI); /* will continue at vlr_loc_upd_node1_pre() once IMSI arrives */ } static int assoc_lfp_with_sub(struct osmo_fsm_inst *fi, struct vlr_subscr *vsub) { struct lu_fsm_priv *lfp = lu_fsm_fi_priv(fi); struct vlr_instance *vlr = lfp->vlr; if (vsub->lu_fsm) { LOGPFSML(fi, LOGL_ERROR, "A Location Updating process is already pending for" " this subscriber. Aborting.\n"); /* Also get rid of the other pending LU attempt? */ /*lu_fsm_failure(vsub->lu_fsm, GSM48_REJECT_CONGESTION);*/ lu_fsm_failure(fi, GSM48_REJECT_CONGESTION); return -EINVAL; } vsub->lu_fsm = fi; vsub->msc_conn_ref = lfp->msc_conn_ref; /* FIXME: send new LAC to HLR? */ vsub->cgi.lai.lac = lfp->new_lai.lac; lfp->vsub = vsub; /* Tell MSC to associate this subscriber with the given * connection */ if (vlr->ops.subscr_assoc(lfp->msc_conn_ref, lfp->vsub)) lu_fsm_failure(fi, GSM48_REJECT_NETWORK_FAILURE); return 0; } static int _lu_fsm_associate_vsub(struct osmo_fsm_inst *fi) { struct lu_fsm_priv *lfp = lu_fsm_fi_priv(fi); struct vlr_instance *vlr = lfp->vlr; struct vlr_subscr *vsub = NULL; if (!lfp->imsi[0]) { /* TMSI was used */ lfp->lu_by_tmsi = true; /* TMSI clash: if a different subscriber already has this TMSI, * we will find that other subscriber in the VLR. So the IMSIs * would mismatch, but we don't know about it. Theoretically, * an authentication process would thwart any attempt to use * someone else's TMSI. * TODO: Otherwise we can ask for the IMSI and verify that it * matches the IMSI on record. */ vsub = vlr_subscr_find_or_create_by_tmsi(vlr, lfp->tmsi, __func__, NULL); if (!vsub) { LOGPFSML(fi, LOGL_ERROR, "VLR subscriber allocation failed\n"); lu_fsm_failure(fi, GSM48_REJECT_SRV_OPT_TMP_OUT_OF_ORDER); return -1; } vsub->sub_dataconf_by_hlr_ind = false; if (assoc_lfp_with_sub(fi, vsub)) { vlr_subscr_put(vsub, __func__); return -1; /* error, fsm failure invoked in assoc_lfp_with_sub() */ } vlr_subscr_put(vsub, __func__); } else { /* IMSI was used */ vsub = vlr_subscr_find_or_create_by_imsi(vlr, lfp->imsi, __func__, NULL); if (!vsub) { LOGPFSML(fi, LOGL_ERROR, "VLR subscriber allocation failed\n"); lu_fsm_failure(fi, GSM48_REJECT_SRV_OPT_TMP_OUT_OF_ORDER); vlr_subscr_put(vsub, __func__); return -1; } vsub->sub_dataconf_by_hlr_ind = false; if (assoc_lfp_with_sub(fi, vsub)) { vlr_subscr_put(vsub, __func__); return -1; /* error, fsm failure invoked in assoc_lfp_with_sub() */ } vlr_subscr_put(vsub, __func__); } return 0; } /* 4.1.2.1: Subscriber (via MSC/SGSN) requests location update */ static void _start_lu_main(struct osmo_fsm_inst *fi) { struct lu_fsm_priv *lfp = lu_fsm_fi_priv(fi); struct vlr_instance *vlr = lfp->vlr; /* TODO: PUESBINE related handling */ /* Is previous LAI in this VLR? */ if (!lai_in_this_vlr(vlr, &lfp->old_lai)) { #if 0 /* FIXME: check previous VLR, (3) */ osmo_fsm_inst_state_chg(fi, VLR_ULA_S_WAIT_PVLR, LU_TIMEOUT_LONG, 0); return; #endif LOGPFSML(fi, LOGL_NOTICE, "LAI change from %s," " but checking previous VLR not implemented\n", osmo_lai_name(&lfp->old_lai)); } /* If this is a TMSI based LU, we may not have the IMSI. Make sure that * we know the IMSI, either on record, or request it. */ if (!lfp->vsub->imsi[0]) vlr_loc_upd_want_imsi(fi); else vlr_loc_upd_node1_pre(fi); } static void lu_fsm_idle(struct osmo_fsm_inst *fi, uint32_t event, void *data) { struct lu_fsm_priv *lfp = lu_fsm_fi_priv(fi); struct vlr_instance *vlr = lfp->vlr; OSMO_ASSERT(event == VLR_ULA_E_UPDATE_LA); if (_lu_fsm_associate_vsub(fi)) return; /* error. FSM already terminated. */ OSMO_ASSERT(lfp->vsub); /* At this point we know for which subscriber the location update is, * we now must inform SGs-UE FSM that we received a location update * via A, IU or Gs interface. */ osmo_fsm_inst_dispatch(lfp->vsub->sgs_fsm, SGS_UE_E_RX_LU_FROM_A_IU_GS, NULL); /* See 3GPP TS 23.012, procedure Retrieve_IMEISV_If_Required */ if ((!vlr->cfg.retrieve_imeisv_early) || (lfp->lu_type == VLR_LU_TYPE_PERIODIC && lfp->vsub->imeisv[0])) { /* R_IMEISV_IR1 passed */ _start_lu_main(fi); } else { vlr->ops.tx_id_req(lfp->msc_conn_ref, GSM_MI_TYPE_IMEISV); osmo_fsm_inst_state_chg(fi, VLR_ULA_S_WAIT_IMEISV, vlr_timer_secs(vlr, 3270), 3270); } } static void lu_fsm_wait_imeisv(struct osmo_fsm_inst *fi, uint32_t event, void *data) { switch (event) { case VLR_ULA_E_ID_IMEISV: /* IMEISV was copied in vlr_subscr_rx_id_resp(), and that's * where we received this event from. */ _start_lu_main(fi); break; default: OSMO_ASSERT(0); break; } } /* Wait for response from Send_Identification to PVLR */ static void lu_fsm_wait_pvlr(struct osmo_fsm_inst *fi, uint32_t event, void *data) { switch (event) { case VLR_ULA_E_SEND_ID_ACK: vlr_loc_upd_node1_pre(fi); break; case VLR_ULA_E_SEND_ID_NACK: vlr_loc_upd_want_imsi(fi); break; default: OSMO_ASSERT(0); break; } } /* Wait for result of Authenticate_VLR procedure */ static void lu_fsm_wait_auth(struct osmo_fsm_inst *fi, uint32_t event, void *data) { struct lu_fsm_priv *lfp = lu_fsm_fi_priv(fi); enum gsm48_reject_value *res = data; lfp->upd_hlr_vlr_fsm = NULL; switch (event) { case VLR_ULA_E_AUTH_SUCCESS: /* Result == Pass */ vlr_loc_upd_post_auth(fi); return; case VLR_ULA_E_AUTH_FAILURE: lu_fsm_failure(fi, res ? *res : GSM48_REJECT_NETWORK_FAILURE); return; case VLR_ULA_E_AUTH_NO_INFO: /* HLR returned no auth info for the subscriber. Continue only if authentication is optional. */ if (lfp->authentication_required || lfp->is_ciphering_required) { lu_fsm_failure(fi, res ? *res : GSM48_REJECT_NETWORK_FAILURE); return; } LOGPFSML(fi, LOGL_INFO, "Attaching subscriber without auth (auth is optional, and no auth info received from HLR)\n"); vlr_loc_upd_post_auth(fi); return; default: OSMO_ASSERT(false); } } static void lu_fsm_wait_ciph(struct osmo_fsm_inst *fi, uint32_t event, void *data) { enum vlr_ciph_result_cause result = VLR_CIPH_REJECT; OSMO_ASSERT(event == VLR_ULA_E_CIPH_RES); if (!data) LOGPFSML(fi, LOGL_ERROR, "invalid ciphering result: NULL\n"); else result = *(enum vlr_ciph_result_cause*)data; switch (result) { case VLR_CIPH_COMPL: vlr_loc_upd_post_ciph(fi); return; case VLR_CIPH_REJECT: LOGPFSM(fi, "ciphering rejected\n"); lu_fsm_failure(fi, GSM48_REJECT_INVALID_MANDANTORY_INF); return; default: LOGPFSML(fi, LOGL_ERROR, "invalid ciphering result: %d\n", result); lu_fsm_failure(fi, GSM48_REJECT_INVALID_MANDANTORY_INF); return; } } static void lu_fsm_wait_imsi(struct osmo_fsm_inst *fi, uint32_t event, void *data) { struct lu_fsm_priv *lfp = lu_fsm_fi_priv(fi); struct vlr_subscr *vsub = lfp->vsub; char *mi_string = data; switch (event) { case VLR_ULA_E_ID_IMSI: vlr_subscr_set_imsi(vsub, mi_string); vlr_loc_upd_node1_pre(fi); break; default: OSMO_ASSERT(0); break; } } /* At the end of Update_HLR_VLR */ static void lu_fsm_wait_hlr_ul_res(struct osmo_fsm_inst *fi, uint32_t event, void *data) { struct lu_fsm_priv *lfp = lu_fsm_fi_priv(fi); switch (event) { case VLR_ULA_E_HLR_LU_RES: /* pass-through this event to Update_HLR_VLR */ if (data == NULL) osmo_fsm_inst_dispatch(lfp->upd_hlr_vlr_fsm, UPD_HLR_VLR_E_UPD_LOC_ACK, NULL); else osmo_fsm_inst_dispatch(lfp->upd_hlr_vlr_fsm, UPD_HLR_VLR_E_UPD_LOC_NACK, data); break; case VLR_ULA_E_UPD_HLR_COMPL: if (data == NULL) { /* successful case */ osmo_fsm_inst_state_chg(fi, VLR_ULA_S_WAIT_LU_COMPL, LU_TIMEOUT_LONG, 0); vlr_loc_upd_start_lu_compl_fsm(fi); /* continue in MSC ?!? */ } else { /* unsuccessful case */ enum gsm48_reject_value cause = *(enum gsm48_reject_value *)data; /* Ignoring standalone mode for now. */ if (0 /* procedure_error && vlr->cfg.standalone_mode */) { osmo_fsm_inst_state_chg(fi, VLR_ULA_S_WAIT_LU_COMPL_STANDALONE, LU_TIMEOUT_LONG, 0); vlr_loc_upd_start_lu_compl_fsm(fi); } else { lu_fsm_failure(fi, cause); } } break; case VLR_ULA_E_ID_IMEI: case VLR_ULA_E_ID_IMEISV: /* Got the IMEI from ME, nothing to do right now though. */ break; default: OSMO_ASSERT(0); break; } } /* Wait for end of Location_Update_Completion_VLR */ static void lu_fsm_wait_lu_compl(struct osmo_fsm_inst *fi, uint32_t event, void *data) { struct lu_fsm_priv *lfp = lu_fsm_fi_priv(fi); uint8_t cause; switch (event) { case VLR_ULA_E_NEW_TMSI_ACK: osmo_fsm_inst_dispatch(lfp->lu_compl_vlr_fsm, LU_COMPL_VLR_E_NEW_TMSI_ACK, NULL); break; case VLR_ULA_E_ID_IMEI: case VLR_ULA_E_ID_IMEISV: /* Got the IMEI from ME, now send it to HLR */ vlr_subscr_tx_req_check_imei(lfp->vsub); break; case VLR_ULA_E_HLR_IMEI_ACK: osmo_fsm_inst_dispatch(lfp->lu_compl_vlr_fsm, LU_COMPL_VLR_E_IMEI_CHECK_ACK, NULL); break; case VLR_ULA_E_HLR_IMEI_NACK: osmo_fsm_inst_dispatch(lfp->lu_compl_vlr_fsm, LU_COMPL_VLR_E_IMEI_CHECK_NACK, NULL); break; case VLR_ULA_E_LU_COMPL_SUCCESS: lu_fsm_discard_lu_compl_fsm(fi); /* Update Register */ /* TODO: Set_Notification_Type 23.078 */ /* TODO: Notify_gsmSCF 23.078 */ /* TODO: Authenticated Radio Contact Established -> ARC */ if (lfp->lu_type == VLR_LU_TYPE_IMSI_ATTACH) lfp->vlr->ops.tx_mm_info(lfp->msc_conn_ref); lu_fsm_success(fi); break; case VLR_ULA_E_LU_COMPL_FAILURE: cause = GSM48_REJECT_NETWORK_FAILURE; if (data) cause = *(uint8_t*)data; lu_fsm_discard_lu_compl_fsm(fi); lu_fsm_failure(fi, cause); break; default: OSMO_ASSERT(0); break; } } /* Wait for end of Location_Update_Completion_VLR (standalone case) */ static void lu_fsm_wait_lu_compl_standalone(struct osmo_fsm_inst *fi, uint32_t event, void *data) { struct lu_fsm_priv *lfp = lu_fsm_fi_priv(fi); struct vlr_subscr *vsub = lfp->vsub; uint8_t cause; switch (event) { case VLR_ULA_E_NEW_TMSI_ACK: osmo_fsm_inst_dispatch(lfp->lu_compl_vlr_fsm, LU_COMPL_VLR_E_NEW_TMSI_ACK, NULL); break; case VLR_ULA_E_LU_COMPL_SUCCESS: lu_fsm_discard_lu_compl_fsm(fi); vsub->sub_dataconf_by_hlr_ind = false; lu_fsm_success(fi); break; case VLR_ULA_E_LU_COMPL_FAILURE: vsub->sub_dataconf_by_hlr_ind = false; cause = GSM48_REJECT_NETWORK_FAILURE; if (data) cause = *(uint8_t*)data; lu_fsm_discard_lu_compl_fsm(fi); lu_fsm_failure(fi, cause); break; default: OSMO_ASSERT(0); break; } } static const struct osmo_fsm_state vlr_lu_fsm_states[] = { [VLR_ULA_S_IDLE] = { .in_event_mask = S(VLR_ULA_E_UPDATE_LA), .out_state_mask = S(VLR_ULA_S_WAIT_IMEISV) | S(VLR_ULA_S_WAIT_PVLR) | S(VLR_ULA_S_WAIT_IMSI) | S(VLR_ULA_S_WAIT_AUTH) | S(VLR_ULA_S_WAIT_CIPH) | S(VLR_ULA_S_WAIT_HLR_CHECK_IMEI_EARLY) | S(VLR_ULA_S_WAIT_HLR_UPD) | S(VLR_ULA_S_DONE), .name = OSMO_STRINGIFY(VLR_ULA_S_IDLE), .action = lu_fsm_idle, }, [VLR_ULA_S_WAIT_IMEISV] = { .in_event_mask = S(VLR_ULA_E_ID_IMEISV), .out_state_mask = S(VLR_ULA_S_WAIT_PVLR) | S(VLR_ULA_S_WAIT_IMSI) | S(VLR_ULA_S_WAIT_AUTH) | S(VLR_ULA_S_WAIT_CIPH) | S(VLR_ULA_S_WAIT_HLR_CHECK_IMEI_EARLY) | S(VLR_ULA_S_WAIT_HLR_UPD) | S(VLR_ULA_S_DONE), .name = OSMO_STRINGIFY(VLR_ULA_S_WAIT_IMEISV), .action = lu_fsm_wait_imeisv, }, [VLR_ULA_S_WAIT_PVLR] = { .in_event_mask = S(VLR_ULA_E_SEND_ID_ACK) | S(VLR_ULA_E_SEND_ID_NACK), .out_state_mask = S(VLR_ULA_S_WAIT_IMSI) | S(VLR_ULA_S_WAIT_AUTH) | S(VLR_ULA_S_WAIT_CIPH) | S(VLR_ULA_S_WAIT_HLR_CHECK_IMEI_EARLY) | S(VLR_ULA_S_DONE), .name = OSMO_STRINGIFY(VLR_ULA_S_WAIT_PVLR), .action = lu_fsm_wait_pvlr, }, [VLR_ULA_S_WAIT_AUTH] = { .in_event_mask = S(VLR_ULA_E_AUTH_SUCCESS) | S(VLR_ULA_E_AUTH_NO_INFO) | S(VLR_ULA_E_AUTH_FAILURE), .out_state_mask = S(VLR_ULA_S_WAIT_CIPH) | S(VLR_ULA_S_WAIT_LU_COMPL) | S(VLR_ULA_S_WAIT_HLR_UPD) | S(VLR_ULA_S_DONE), .name = OSMO_STRINGIFY(VLR_ULA_S_WAIT_AUTH), .action = lu_fsm_wait_auth, }, [VLR_ULA_S_WAIT_CIPH] = { .name = OSMO_STRINGIFY(VLR_ULA_S_WAIT_CIPH), .in_event_mask = S(VLR_ULA_E_CIPH_RES), .out_state_mask = S(VLR_ULA_S_WAIT_LU_COMPL) | S(VLR_ULA_S_WAIT_HLR_UPD) | S(VLR_ULA_S_DONE), .action = lu_fsm_wait_ciph, }, [VLR_ULA_S_WAIT_IMSI] = { .in_event_mask = S(VLR_ULA_E_ID_IMSI), .out_state_mask = S(VLR_ULA_S_WAIT_AUTH) | S(VLR_ULA_S_WAIT_CIPH) | S(VLR_ULA_S_WAIT_HLR_CHECK_IMEI_EARLY) | S(VLR_ULA_S_WAIT_HLR_UPD) | S(VLR_ULA_S_DONE), .name = OSMO_STRINGIFY(VLR_ULA_S_WAIT_IMSI), .action = lu_fsm_wait_imsi, }, [VLR_ULA_S_WAIT_HLR_CHECK_IMEI_EARLY] = { .in_event_mask = S(VLR_ULA_E_HLR_IMEI_ACK) | S(VLR_ULA_E_HLR_IMEI_NACK), .out_state_mask = S(VLR_ULA_S_WAIT_AUTH) | S(VLR_ULA_S_WAIT_CIPH) | S(VLR_ULA_S_WAIT_HLR_UPD) | S(VLR_ULA_S_WAIT_LU_COMPL) | S(VLR_ULA_S_DONE), .name = OSMO_STRINGIFY(VLR_ULA_S_WAIT_HLR_CHECK_IMEI_EARLY), .action = lu_fsm_wait_hlr_check_imei_early, }, [VLR_ULA_S_WAIT_HLR_UPD] = { .in_event_mask = S(VLR_ULA_E_HLR_LU_RES) | S(VLR_ULA_E_UPD_HLR_COMPL) | S(VLR_ULA_E_ID_IMEI) | S(VLR_ULA_E_ID_IMEISV), .out_state_mask = S(VLR_ULA_S_WAIT_LU_COMPL) | S(VLR_ULA_S_WAIT_LU_COMPL_STANDALONE) | S(VLR_ULA_S_DONE), .name = OSMO_STRINGIFY(VLR_ULA_S_WAIT_HLR_UPD), .action = lu_fsm_wait_hlr_ul_res, }, [VLR_ULA_S_WAIT_LU_COMPL] = { .in_event_mask = S(VLR_ULA_E_LU_COMPL_SUCCESS) | S(VLR_ULA_E_LU_COMPL_FAILURE) | S(VLR_ULA_E_NEW_TMSI_ACK) | S(VLR_ULA_E_ID_IMEI) | S(VLR_ULA_E_ID_IMEISV) | S(VLR_ULA_E_HLR_IMEI_ACK) | S(VLR_ULA_E_HLR_IMEI_NACK), .out_state_mask = S(VLR_ULA_S_DONE), .name = OSMO_STRINGIFY(VLR_ULA_S_WAIT_LU_COMPL), .action = lu_fsm_wait_lu_compl, }, [VLR_ULA_S_WAIT_LU_COMPL_STANDALONE] = { .in_event_mask = S(VLR_ULA_E_LU_COMPL_SUCCESS) | S(VLR_ULA_E_LU_COMPL_FAILURE) | S(VLR_ULA_E_NEW_TMSI_ACK), .out_state_mask = S(VLR_ULA_S_DONE), .name = OSMO_STRINGIFY(VLR_ULA_S_WAIT_LU_COMPL_STANDALONE), .action = lu_fsm_wait_lu_compl_standalone, }, [VLR_ULA_S_DONE] = { .name = OSMO_STRINGIFY(VLR_ULA_S_DONE), .onenter = lu_fsm_dispatch_result, }, }; static void fsm_lu_cleanup(struct osmo_fsm_inst *fi, enum osmo_fsm_term_cause cause) { struct lu_fsm_priv *lfp = lu_fsm_fi_priv(fi); struct vlr_subscr *vsub = lfp->vsub; LOGPFSM(fi, "fsm_lu_cleanup called with cause %s\n", osmo_fsm_term_cause_name(cause)); if (vsub && vsub->lu_fsm == fi) vsub->lu_fsm = NULL; } static struct osmo_fsm vlr_lu_fsm = { .name = "vlr_lu_fsm", .states = vlr_lu_fsm_states, .num_states = ARRAY_SIZE(vlr_lu_fsm_states), .allstate_event_mask = 0, .allstate_action = NULL, .log_subsys = DLGLOBAL, .event_names = fsm_lu_event_names, .cleanup = fsm_lu_cleanup, }; static inline struct lu_fsm_priv *lu_fsm_fi_priv(struct osmo_fsm_inst *fi) { OSMO_ASSERT(fi->fsm == &vlr_lu_fsm); return (struct lu_fsm_priv*)fi->priv; } struct osmo_fsm_inst * vlr_loc_update(struct osmo_fsm_inst *parent, uint32_t parent_event_success, uint32_t parent_event_failure, void *parent_event_data, struct vlr_instance *vlr, void *msc_conn_ref, enum vlr_lu_type type, uint32_t tmsi, const char *imsi, const struct osmo_location_area_id *old_lai, const struct osmo_location_area_id *new_lai, bool authentication_required, bool is_ciphering_to_be_attempted, bool is_ciphering_required, uint8_t key_seq, bool is_r99, bool is_utran, bool assign_tmsi) { struct osmo_fsm_inst *fi; struct lu_fsm_priv *lfp; if (is_ciphering_required) OSMO_ASSERT(is_ciphering_to_be_attempted); fi = osmo_fsm_inst_alloc_child(&vlr_lu_fsm, parent, parent_event_failure); if (!fi) return NULL; lfp = talloc_zero(fi, struct lu_fsm_priv); lfp->vlr = vlr; lfp->msc_conn_ref = msc_conn_ref; lfp->tmsi = tmsi; lfp->lu_type = type; lfp->old_lai = *old_lai; lfp->new_lai = *new_lai; lfp->lu_by_tmsi = true; lfp->parent_event_success = parent_event_success; lfp->parent_event_failure = parent_event_failure; lfp->parent_event_data = parent_event_data; lfp->authentication_required = authentication_required; lfp->is_ciphering_to_be_attempted = is_ciphering_to_be_attempted; lfp->is_ciphering_required = is_ciphering_required; lfp->key_seq = key_seq; lfp->is_r99 = is_r99; lfp->is_utran = is_utran; lfp->assign_tmsi = assign_tmsi; if (imsi) { strncpy(lfp->imsi, imsi, sizeof(lfp->imsi)-1); lfp->imsi[sizeof(lfp->imsi)-1] = '\0'; lfp->lu_by_tmsi = false; } fi->priv = lfp; LOGPFSM(fi, "rev=%s net=%s%s%s\n", is_r99 ? "R99" : "GSM", is_utran ? "UTRAN" : "GERAN", (authentication_required || is_ciphering_to_be_attempted) ? " Auth" : " (no Auth)", (authentication_required || is_ciphering_to_be_attempted) ? (is_ciphering_to_be_attempted ? "+Ciph" : " (no Ciph)") : ""); if (is_utran && !authentication_required) LOGPFSML(fi, LOGL_ERROR, "Authentication off on UTRAN network. Good luck.\n"); osmo_fsm_inst_dispatch(fi, VLR_ULA_E_UPDATE_LA, NULL); return fi; } void vlr_loc_update_cancel(struct osmo_fsm_inst *fi, enum osmo_fsm_term_cause fsm_cause, uint8_t gsm48_cause) { struct lu_fsm_priv *lfp; OSMO_ASSERT(fi); OSMO_ASSERT(fi->fsm == &vlr_lu_fsm); lfp = fi->priv; lfp->rej_cause = gsm48_cause; if (fi->state != VLR_ULA_S_DONE) lu_fsm_failure(fi, gsm48_cause); } void vlr_lu_fsm_init(void) { OSMO_ASSERT(osmo_fsm_register(&vlr_lu_fsm) == 0); OSMO_ASSERT(osmo_fsm_register(&upd_hlr_vlr_fsm) == 0); OSMO_ASSERT(osmo_fsm_register(&sub_pres_vlr_fsm) == 0); OSMO_ASSERT(osmo_fsm_register(&lu_compl_vlr_fsm) == 0); } void vlr_lu_fsm_set_log_subsys(int log_subsys) { vlr_lu_fsm.log_subsys = log_subsys; upd_hlr_vlr_fsm.log_subsys = log_subsys; sub_pres_vlr_fsm.log_subsys = log_subsys; lu_compl_vlr_fsm.log_subsys = log_subsys; }