/* * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The OpenAirInterface Software Alliance licenses this file to You under * the OAI Public License, Version 1.1 (the "License"); you may not use this file * except in compliance with the License. * You may obtain a copy of the License at * * http://www.openairinterface.org/?page_id=698 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. *------------------------------------------------------------------------------- * For more information about the OpenAirInterface (OAI) Software Alliance: * contact@openairinterface.org */ /* \file rrc_UE.c * \brief RRC procedures * \author R. Knopp, K.H. HSU * \date 2018 * \version 0.1 * \company Eurecom / NTUST * \email: knopp@eurecom.fr, kai-hsiang.hsu@eurecom.fr * \note * \warning */ #define RRC_UE #define RRC_UE_C #include "oai_asn1.h" #include "NR_DL-DCCH-Message.h" //asn_DEF_NR_DL_DCCH_Message #include "NR_DL-CCCH-Message.h" //asn_DEF_NR_DL_CCCH_Message #include "NR_BCCH-BCH-Message.h" //asn_DEF_NR_BCCH_BCH_Message #include "NR_BCCH-DL-SCH-Message.h" //asn_DEF_NR_BCCH_DL_SCH_Message #include "NR_CellGroupConfig.h" //asn_DEF_NR_CellGroupConfig #include "NR_BWP-Downlink.h" //asn_DEF_NR_BWP_Downlink #include "NR_RRCReconfiguration.h" #include "NR_MeasConfig.h" #include "NR_UL-DCCH-Message.h" #include "uper_encoder.h" #include "uper_decoder.h" #include "rrc_defs.h" #include "rrc_proto.h" #include "LAYER2/NR_MAC_UE/mac_proto.h" #include "intertask_interface.h" #include "LAYER2/nr_rlc/nr_rlc_oai_api.h" #include "nr-uesoftmodem.h" #include "plmn_data.h" #include "nr_pdcp/nr_pdcp_oai_api.h" #include "openair3/SECU/secu_defs.h" #include "openair3/SECU/key_nas_deriver.h" #include "common/utils/LOG/log.h" #include "common/utils/LOG/vcd_signal_dumper.h" #ifndef CELLULAR #include "RRC/NR/MESSAGES/asn1_msg.h" #endif #include "RRC/NAS/nas_config.h" #include "RRC/NAS/rb_config.h" #include "SIMULATION/TOOLS/sim.h" // for taus #include "nr_nas_msg_sim.h" static NR_UE_RRC_INST_t *NR_UE_rrc_inst; /* NAS Attach request with IMSI */ static const char nr_nas_attach_req_imsi_dummy_NSA_case[] = { 0x07, 0x41, /* EPS Mobile identity = IMSI */ 0x71, 0x08, 0x29, 0x80, 0x43, 0x21, 0x43, 0x65, 0x87, 0xF9, /* End of EPS Mobile Identity */ 0x02, 0xE0, 0xE0, 0x00, 0x20, 0x02, 0x03, 0xD0, 0x11, 0x27, 0x1A, 0x80, 0x80, 0x21, 0x10, 0x01, 0x00, 0x00, 0x10, 0x81, 0x06, 0x00, 0x00, 0x00, 0x00, 0x83, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0D, 0x00, 0x00, 0x0A, 0x00, 0x52, 0x12, 0xF2, 0x01, 0x27, 0x11, }; static void nr_rrc_manage_rlc_bearers(const NR_UE_RRC_INST_t *rrc, const NR_CellGroupConfig_t *cellGroupConfig, rrcPerNB_t *nb); static void nr_rrc_ue_process_RadioBearerConfig(NR_UE_RRC_INST_t *ue_rrc, rrcPerNB_t *rrcNB, NR_RadioBearerConfig_t *const radioBearerConfig); static void nr_rrc_ue_generate_rrcReestablishmentComplete(NR_RRCReestablishment_t *rrcReestablishment); static void process_lte_nsa_msg(NR_UE_RRC_INST_t *rrc, nsa_msg_t *msg, int msg_len); static void nr_rrc_ue_process_rrcReconfiguration(NR_UE_RRC_INST_t *rrc, int gNB_index, NR_RRCReconfiguration_t *rrcReconfiguration); static void nr_rrc_ue_process_ueCapabilityEnquiry(NR_UE_RRC_INST_t *rrc, NR_UECapabilityEnquiry_t *UECapabilityEnquiry); static void nr_rrc_ue_process_masterCellGroup(NR_UE_RRC_INST_t *rrc, rrcPerNB_t *rrcNB, OCTET_STRING_t *masterCellGroup, long *fullConfig); void nr_rrc_ue_process_measConfig(rrcPerNB_t *rrc, NR_MeasConfig_t *const measConfig); static void nr_rrc_ue_process_rrcReconfiguration(NR_UE_RRC_INST_t *rrc, int gNB_index, NR_RRCReconfiguration_t *rrcReconfiguration) { rrcPerNB_t *rrcNB = rrc->perNB + gNB_index; switch (rrcReconfiguration->criticalExtensions.present) { case NR_RRCReconfiguration__criticalExtensions_PR_rrcReconfiguration: { NR_RRCReconfiguration_IEs_t *ie = rrcReconfiguration->criticalExtensions.choice.rrcReconfiguration; if (ie->radioBearerConfig != NULL) { LOG_I(NR_RRC, "radio Bearer Configuration is present\n"); nr_rrc_ue_process_RadioBearerConfig(rrc, rrcNB, ie->radioBearerConfig); if (LOG_DEBUGFLAG(DEBUG_ASN1)) xer_fprint(stdout, &asn_DEF_NR_RadioBearerConfig, (const void *)ie->radioBearerConfig); } if (ie->nonCriticalExtension) { NR_RRCReconfiguration_v1530_IEs_t *ext = ie->nonCriticalExtension; if (ext->masterCellGroup) nr_rrc_ue_process_masterCellGroup(rrc, rrcNB, ext->masterCellGroup, ext->fullConfig); /* Check if there is dedicated NAS information to forward to NAS */ if (ie->nonCriticalExtension->dedicatedNAS_MessageList) { struct NR_RRCReconfiguration_v1530_IEs__dedicatedNAS_MessageList *tmp = ext->dedicatedNAS_MessageList; for (int i = 0; i < tmp->list.count; i++) { MessageDef *ittiMsg = itti_alloc_new_message(TASK_RRC_NRUE, 0, NAS_CONN_ESTABLI_CNF); NasConnEstabCnf *msg = &NAS_CONN_ESTABLI_CNF(ittiMsg); msg->errCode = AS_SUCCESS; msg->nasMsg.length = tmp->list.array[i]->size; msg->nasMsg.data = tmp->list.array[i]->buf; itti_send_msg_to_task(TASK_NAS_NRUE, rrc->ue_id, ittiMsg); } tmp->list.count = 0; // to prevent the automatic free by ASN1_FREE } } if (ie->secondaryCellGroup != NULL) { NR_CellGroupConfig_t *cellGroupConfig = NULL; asn_dec_rval_t dec_rval = uper_decode(NULL, &asn_DEF_NR_CellGroupConfig, // might be added prefix later (void **)&cellGroupConfig, (uint8_t *)ie->secondaryCellGroup->buf, ie->secondaryCellGroup->size, 0, 0); if ((dec_rval.code != RC_OK) && (dec_rval.consumed == 0)) { uint8_t *buffer = ie->secondaryCellGroup->buf; LOG_E(NR_RRC, "NR_CellGroupConfig decode error\n"); for (int i = 0; i < ie->secondaryCellGroup->size; i++) LOG_E(NR_RRC, "%02x ", buffer[i]); LOG_E(NR_RRC, "\n"); // free the memory SEQUENCE_free(&asn_DEF_NR_CellGroupConfig, (void *)cellGroupConfig, 1); } if (LOG_DEBUGFLAG(DEBUG_ASN1)) xer_fprint(stdout, &asn_DEF_NR_CellGroupConfig, (const void *) cellGroupConfig); nr_rrc_cellgroup_configuration(rrcNB, rrc, cellGroupConfig); if (!get_softmodem_params()->sa) nr_rrc_mac_config_req_cg(0, 0, cellGroupConfig); } if (ie->measConfig != NULL) { LOG_I(NR_RRC, "Measurement Configuration is present\n"); // if some element need to be updated nr_rrc_ue_process_measConfig(rrcNB, ie->measConfig); } if (ie->lateNonCriticalExtension != NULL) { // unuse now } } break; case NR_RRCReconfiguration__criticalExtensions_PR_NOTHING: case NR_RRCReconfiguration__criticalExtensions_PR_criticalExtensionsFuture: default: break; } return; } void process_nsa_message(NR_UE_RRC_INST_t *rrc, nsa_message_t nsa_message_type, void *message, int msg_len) { switch (nsa_message_type) { case nr_SecondaryCellGroupConfig_r15: { NR_RRCReconfiguration_t *RRCReconfiguration=NULL; asn_dec_rval_t dec_rval = uper_decode_complete( NULL, &asn_DEF_NR_RRCReconfiguration, (void **)&RRCReconfiguration, (uint8_t *)message, msg_len); if ((dec_rval.code != RC_OK) && (dec_rval.consumed == 0)) { LOG_E(NR_RRC, "NR_RRCReconfiguration decode error\n"); // free the memory SEQUENCE_free( &asn_DEF_NR_RRCReconfiguration, RRCReconfiguration, 1 ); return; } nr_rrc_ue_process_rrcReconfiguration(rrc, 0, RRCReconfiguration); ASN_STRUCT_FREE(asn_DEF_NR_RRCReconfiguration, RRCReconfiguration); } break; case nr_RadioBearerConfigX_r15: { NR_RadioBearerConfig_t *RadioBearerConfig=NULL; asn_dec_rval_t dec_rval = uper_decode_complete( NULL, &asn_DEF_NR_RadioBearerConfig, (void **)&RadioBearerConfig, (uint8_t *)message, msg_len); if ((dec_rval.code != RC_OK) && (dec_rval.consumed == 0)) { LOG_E(NR_RRC, "NR_RadioBearerConfig decode error\n"); // free the memory SEQUENCE_free( &asn_DEF_NR_RadioBearerConfig, RadioBearerConfig, 1 ); return; } if (get_softmodem_params()->nsa) { LOG_D(NR_RRC, "Calling nr_rrc_ue_process_RadioBearerConfig() at %d with: e_rab_id = %ld, drbID = %ld, cipher_algo = %ld, key = %ld \n", __LINE__, RadioBearerConfig->drb_ToAddModList->list.array[0]->cnAssociation->choice.eps_BearerIdentity, RadioBearerConfig->drb_ToAddModList->list.array[0]->drb_Identity, RadioBearerConfig->securityConfig->securityAlgorithmConfig->cipheringAlgorithm, *RadioBearerConfig->securityConfig->keyToUse); nr_rrc_ue_process_RadioBearerConfig(rrc, rrc->perNB + 0, RadioBearerConfig); } if (LOG_DEBUGFLAG(DEBUG_ASN1)) xer_fprint(stdout, &asn_DEF_NR_RadioBearerConfig, (const void *)RadioBearerConfig); ASN_STRUCT_FREE(asn_DEF_NR_RadioBearerConfig, RadioBearerConfig); } break; default: AssertFatal(1==0,"Unknown message %d\n",nsa_message_type); break; } } NR_UE_RRC_INST_t* nr_rrc_init_ue(char* uecap_file, int nb_inst) { NR_UE_rrc_inst = (NR_UE_RRC_INST_t *)calloc(nb_inst, sizeof(NR_UE_RRC_INST_t)); AssertFatal(NR_UE_rrc_inst, "Couldn't allocate %d instances of RRC module\n", nb_inst); for(int nr_ue = 0; nr_ue < nb_inst; nr_ue++) { NR_UE_RRC_INST_t *rrc = &NR_UE_rrc_inst[nr_ue]; rrc->ue_id = nr_ue; // fill UE-NR-Capability @ UE-CapabilityRAT-Container here. rrc->selected_plmn_identity = 1; rrc->dl_bwp_id = 0; rrc->ul_bwp_id = 0; rrc->as_security_activated = false; rrc->ra_trigger = RA_NOT_RUNNING; rrc->uecap_file = uecap_file; for (int i = 0; i < NB_CNX_UE; i++) { rrcPerNB_t *ptr = &rrc->perNB[i]; ptr->SInfo = (NR_UE_RRC_SI_INFO){0}; for (int j = 0; j < NR_NUM_SRB; j++) ptr->Srb[j] = RB_NOT_PRESENT; for (int j = 0; j < MAX_DRBS_PER_UE; j++) ptr->status_DRBs[j] = RB_NOT_PRESENT; // SRB0 activated by default ptr->Srb[0] = RB_ESTABLISHED; } } if (get_softmodem_params()->sl_mode) { configure_NR_SL_Preconfig(get_softmodem_params()->sync_ref); } return NR_UE_rrc_inst; } bool check_si_validity(NR_UE_RRC_SI_INFO *SI_info, int si_type) { switch (si_type) { case NR_SIB_TypeInfo__type_sibType2: if (!SI_info->sib2 || SI_info->sib2_timer == -1) return false; break; case NR_SIB_TypeInfo__type_sibType3: if (!SI_info->sib3 || SI_info->sib3_timer == -1) return false; break; case NR_SIB_TypeInfo__type_sibType4: if (!SI_info->sib4 || SI_info->sib4_timer == -1) return false; break; case NR_SIB_TypeInfo__type_sibType5: if (!SI_info->sib5 || SI_info->sib5_timer == -1) return false; break; case NR_SIB_TypeInfo__type_sibType6: if (!SI_info->sib6 || SI_info->sib6_timer == -1) return false; break; case NR_SIB_TypeInfo__type_sibType7: if (!SI_info->sib7 || SI_info->sib7_timer == -1) return false; break; case NR_SIB_TypeInfo__type_sibType8: if (!SI_info->sib8 || SI_info->sib8_timer == -1) return false; break; case NR_SIB_TypeInfo__type_sibType9: if (!SI_info->sib9 || SI_info->sib9_timer == -1) return false; break; case NR_SIB_TypeInfo__type_sibType10_v1610: if (!SI_info->sib10 || SI_info->sib10_timer == -1) return false; break; case NR_SIB_TypeInfo__type_sibType11_v1610: if (!SI_info->sib11 || SI_info->sib11_timer == -1) return false; break; case NR_SIB_TypeInfo__type_sibType12_v1610: if (!SI_info->sib12 || SI_info->sib12_timer == -1) return false; break; case NR_SIB_TypeInfo__type_sibType13_v1610: if (!SI_info->sib13 || SI_info->sib13_timer == -1) return false; break; case NR_SIB_TypeInfo__type_sibType14_v1610: if (!SI_info->sib14 || SI_info->sib14_timer == -1) return false; break; default : AssertFatal(false, "Invalid SIB type %d\n", si_type); } return true; } int check_si_status(NR_UE_RRC_SI_INFO *SI_info) { // schedule reception of SIB1 if RRC doesn't have it // or if the timer expired if (!SI_info->sib1 || SI_info->sib1_timer == -1) return 1; else { if (SI_info->sib1->si_SchedulingInfo) { // Check if RRC has configured default SI // from SIB2 to SIB14 as current ASN1 version // TODO can be used for on demand SI when (if) implemented for (int i = 2; i < 15; i++) { int si_index = i - 2; if ((SI_info->default_otherSI_map >> si_index) & 0x01) { // if RRC has no valid version of one of the default configured SI // Then schedule reception of otherSI if (!check_si_validity(SI_info, si_index)) return 2; } } } } return 0; } /*brief decode BCCH-BCH (MIB) message*/ static void nr_rrc_ue_decode_NR_BCCH_BCH_Message(NR_UE_RRC_INST_t *rrc, const uint8_t gNB_index, uint8_t *const bufferP, const uint8_t buffer_len) { NR_BCCH_BCH_Message_t *bcch_message = NULL; asn_dec_rval_t dec_rval = uper_decode_complete(NULL, &asn_DEF_NR_BCCH_BCH_Message, (void **)&bcch_message, (const void *)bufferP, buffer_len); if ((dec_rval.code != RC_OK) || (dec_rval.consumed == 0)) { LOG_E(NR_RRC, "NR_BCCH_BCH decode error\n"); return; } int get_sib = 0; if (get_softmodem_params()->sa && bcch_message->message.choice.mib->cellBarred == NR_MIB__cellBarred_notBarred && rrc->nrRrcState != RRC_STATE_DETACH_NR) { NR_UE_RRC_SI_INFO *SI_info = &rrc->perNB[gNB_index].SInfo; // to schedule MAC to get SI if required get_sib = check_si_status(SI_info); } nr_rrc_mac_config_req_mib(rrc->ue_id, 0, bcch_message->message.choice.mib, get_sib); ASN_STRUCT_FREE(asn_DEF_NR_BCCH_BCH_Message, bcch_message); return; } static int nr_decode_SI(NR_UE_RRC_SI_INFO *SI_info, NR_SystemInformation_t *si) { VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_RRC_UE_DECODE_SI, VCD_FUNCTION_IN ); // Dump contents if (si->criticalExtensions.present == NR_SystemInformation__criticalExtensions_PR_systemInformation || si->criticalExtensions.present == NR_SystemInformation__criticalExtensions_PR_criticalExtensionsFuture_r16) { LOG_D( RRC, "[UE] si->criticalExtensions.choice.NR_SystemInformation_t->sib_TypeAndInfo.list.count %d\n", si->criticalExtensions.choice.systemInformation->sib_TypeAndInfo.list.count ); } else { LOG_D( RRC, "[UE] Unknown criticalExtension version (not Rel16)\n" ); return -1; } for (int i = 0; i < si->criticalExtensions.choice.systemInformation->sib_TypeAndInfo.list.count; i++) { SystemInformation_IEs__sib_TypeAndInfo__Member *typeandinfo; typeandinfo = si->criticalExtensions.choice.systemInformation->sib_TypeAndInfo.list.array[i]; LOG_I(RRC, "Found SIB%d\n", typeandinfo->present + 1); switch(typeandinfo->present) { case NR_SystemInformation_IEs__sib_TypeAndInfo__Member_PR_sib2: if(!SI_info->sib2) SI_info->sib2 = calloc(1, sizeof(*SI_info->sib2)); memcpy(SI_info->sib2, typeandinfo->choice.sib2, sizeof(NR_SIB2_t)); SI_info->sib2_timer = 0; break; case NR_SystemInformation_IEs__sib_TypeAndInfo__Member_PR_sib3: if(!SI_info->sib3) SI_info->sib3 = calloc(1, sizeof(*SI_info->sib3)); memcpy(SI_info->sib3, typeandinfo->choice.sib3, sizeof(NR_SIB3_t)); SI_info->sib3_timer = 0; break; case NR_SystemInformation_IEs__sib_TypeAndInfo__Member_PR_sib4: if(!SI_info->sib4) SI_info->sib4 = calloc(1, sizeof(*SI_info->sib4)); memcpy(SI_info->sib4, typeandinfo->choice.sib4, sizeof(NR_SIB4_t)); SI_info->sib4_timer = 0; break; case NR_SystemInformation_IEs__sib_TypeAndInfo__Member_PR_sib5: if(!SI_info->sib5) SI_info->sib5 = calloc(1, sizeof(*SI_info->sib5)); memcpy(SI_info->sib5, typeandinfo->choice.sib5, sizeof(NR_SIB5_t)); SI_info->sib5_timer = 0; break; case NR_SystemInformation_IEs__sib_TypeAndInfo__Member_PR_sib6: if(!SI_info->sib6) SI_info->sib6 = calloc(1, sizeof(*SI_info->sib6)); memcpy(SI_info->sib6, typeandinfo->choice.sib6, sizeof(NR_SIB6_t)); SI_info->sib6_timer = 0; break; case NR_SystemInformation_IEs__sib_TypeAndInfo__Member_PR_sib7: if(!SI_info->sib7) SI_info->sib7 = calloc(1, sizeof(*SI_info->sib7)); memcpy(SI_info->sib7, typeandinfo->choice.sib7, sizeof(NR_SIB7_t)); SI_info->sib7_timer = 0; break; case NR_SystemInformation_IEs__sib_TypeAndInfo__Member_PR_sib8: if(!SI_info->sib8) SI_info->sib8 = calloc(1, sizeof(*SI_info->sib8)); memcpy(SI_info->sib8, typeandinfo->choice.sib8, sizeof(NR_SIB8_t)); SI_info->sib8_timer = 0; break; case NR_SystemInformation_IEs__sib_TypeAndInfo__Member_PR_sib9: if(!SI_info->sib9) SI_info->sib9 = calloc(1, sizeof(*SI_info->sib9)); memcpy(SI_info->sib9, typeandinfo->choice.sib9, sizeof(NR_SIB9_t)); SI_info->sib9_timer = 0; break; case NR_SystemInformation_IEs__sib_TypeAndInfo__Member_PR_sib10_v1610: if(!SI_info->sib10) SI_info->sib10 = calloc(1, sizeof(*SI_info->sib10)); memcpy(SI_info->sib10, typeandinfo->choice.sib10_v1610, sizeof(NR_SIB10_r16_t)); SI_info->sib10_timer = 0; break; case NR_SystemInformation_IEs__sib_TypeAndInfo__Member_PR_sib11_v1610: if(!SI_info->sib11) SI_info->sib11 = calloc(1, sizeof(*SI_info->sib11)); memcpy(SI_info->sib11, typeandinfo->choice.sib11_v1610, sizeof(NR_SIB11_r16_t)); SI_info->sib11_timer = 0; break; case NR_SystemInformation_IEs__sib_TypeAndInfo__Member_PR_sib12_v1610: if(!SI_info->sib12) SI_info->sib12 = calloc(1, sizeof(*SI_info->sib12)); memcpy(SI_info->sib12, typeandinfo->choice.sib12_v1610, sizeof(NR_SIB12_r16_t)); SI_info->sib12_timer = 0; break; case NR_SystemInformation_IEs__sib_TypeAndInfo__Member_PR_sib13_v1610: if(!SI_info->sib13) SI_info->sib13 = calloc(1, sizeof(*SI_info->sib13)); memcpy(SI_info->sib13, typeandinfo->choice.sib13_v1610, sizeof(NR_SIB13_r16_t)); SI_info->sib13_timer = 0; break; case NR_SystemInformation_IEs__sib_TypeAndInfo__Member_PR_sib14_v1610: if(!SI_info->sib14) SI_info->sib14 = calloc(1, sizeof(*SI_info->sib14)); memcpy(SI_info->sib12, typeandinfo->choice.sib14_v1610, sizeof(NR_SIB14_r16_t)); SI_info->sib14_timer = 0; break; default: break; } } VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_RRC_UE_DECODE_SI, VCD_FUNCTION_OUT); return 0; } static void nr_rrc_handle_msg3_indication(NR_UE_RRC_INST_t *rrc, int rnti) { switch (rrc->ra_trigger) { case INITIAL_ACCESS_FROM_RRC_IDLE: // After SIB1 is received, prepare RRCConnectionRequest rrc->rnti = rnti; // start timer T300 NR_UE_Timers_Constants_t *tac = &rrc->timers_and_constants; tac->T300_active = true; break; case RRC_CONNECTION_REESTABLISHMENT: AssertFatal(1==0, "ra_trigger not implemented yet!\n"); break; case DURING_HANDOVER: AssertFatal(1==0, "ra_trigger not implemented yet!\n"); break; case NON_SYNCHRONISED: AssertFatal(1==0, "ra_trigger not implemented yet!\n"); break; case TRANSITION_FROM_RRC_INACTIVE: AssertFatal(1==0, "ra_trigger not implemented yet!\n"); break; case TO_ESTABLISH_TA: AssertFatal(1==0, "ra_trigger not implemented yet!\n"); break; case REQUEST_FOR_OTHER_SI: AssertFatal(1==0, "ra_trigger not implemented yet!\n"); break; case BEAM_FAILURE_RECOVERY: AssertFatal(1==0, "ra_trigger not implemented yet!\n"); break; default: AssertFatal(1==0, "Invalid ra_trigger value!\n"); break; } } static void nr_rrc_ue_prepare_RRCSetupRequest(NR_UE_RRC_INST_t *rrc) { LOG_D(NR_RRC, "Generation of RRCSetupRequest\n"); uint8_t rv[6]; // Get RRCConnectionRequest, fill random for now // Generate random byte stream for contention resolution for (int i = 0; i < 6; i++) { #ifdef SMBV // if SMBV is configured the contention resolution needs to be fix for the connection procedure to succeed rv[i] = i; #else rv[i] = taus() & 0xff; #endif } uint8_t buf[1024]; int len = do_RRCSetupRequest(buf, sizeof(buf), rv); nr_rlc_srb_recv_sdu(rrc->ue_id, 0, buf, len); } void nr_rrc_configure_default_SI(NR_UE_RRC_SI_INFO *SI_info, NR_SIB1_t *sib1) { struct NR_SI_SchedulingInfo *si_SchedulingInfo = sib1->si_SchedulingInfo; if (!si_SchedulingInfo) return; SI_info->default_otherSI_map = 0; for (int i = 0; i < si_SchedulingInfo->schedulingInfoList.list.count; i++) { struct NR_SchedulingInfo *schedulingInfo = si_SchedulingInfo->schedulingInfoList.list.array[i]; for (int j = 0; j < schedulingInfo->sib_MappingInfo.list.count; j++) { struct NR_SIB_TypeInfo *sib_Type = schedulingInfo->sib_MappingInfo.list.array[j]; SI_info->default_otherSI_map |= 1 << sib_Type->type; } } } static int8_t nr_rrc_ue_decode_NR_BCCH_DL_SCH_Message(NR_UE_RRC_INST_t *rrc, const uint8_t gNB_index, uint8_t *const Sdu, const uint8_t Sdu_len, const uint8_t rsrq, const uint8_t rsrp) { NR_BCCH_DL_SCH_Message_t *bcch_message = NULL; NR_UE_RRC_SI_INFO *SI_info = &rrc->perNB[gNB_index].SInfo; VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_DECODE_BCCH, VCD_FUNCTION_IN); asn_dec_rval_t dec_rval = uper_decode_complete(NULL, &asn_DEF_NR_BCCH_DL_SCH_Message, (void **)&bcch_message, (const void *)Sdu, Sdu_len); if (LOG_DEBUGFLAG(DEBUG_ASN1)) { xer_fprint(stdout, &asn_DEF_NR_BCCH_DL_SCH_Message,(void *)bcch_message); } if ((dec_rval.code != RC_OK) && (dec_rval.consumed == 0)) { LOG_E(NR_RRC, "[UE %ld] Failed to decode BCCH_DLSCH_MESSAGE (%zu bits)\n", rrc->ue_id, dec_rval.consumed); log_dump(NR_RRC, Sdu, Sdu_len, LOG_DUMP_CHAR," Received bytes:\n"); // free the memory SEQUENCE_free(&asn_DEF_NR_BCCH_DL_SCH_Message, (void *)bcch_message, 1); VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_UE_DECODE_BCCH, VCD_FUNCTION_OUT ); return -1; } if (bcch_message->message.present == NR_BCCH_DL_SCH_MessageType_PR_c1) { switch (bcch_message->message.choice.c1->present) { case NR_BCCH_DL_SCH_MessageType__c1_PR_systemInformationBlockType1: LOG_D(NR_RRC, "[UE %ld] Decoding SIB1\n", rrc->ue_id); asn1cFreeStruc(asn_DEF_NR_SIB1, SI_info->sib1); NR_SIB1_t *sib1 = bcch_message->message.choice.c1->choice.systemInformationBlockType1; if(!SI_info->sib1) SI_info->sib1 = calloc(1, sizeof(*SI_info->sib1)); memcpy(SI_info->sib1, sib1, sizeof(NR_SIB1_t)); if(g_log->log_component[NR_RRC].level >= OAILOG_DEBUG) xer_fprint(stdout, &asn_DEF_NR_SIB1, (const void *) SI_info->sib1); LOG_A(NR_RRC, "SIB1 decoded\n"); SI_info->sib1_timer = 0; if (rrc->nrRrcState == RRC_STATE_IDLE_NR) { rrc->ra_trigger = INITIAL_ACCESS_FROM_RRC_IDLE; // preparing RRC setup request payload in advance nr_rrc_ue_prepare_RRCSetupRequest(rrc); } // configure default SI nr_rrc_configure_default_SI(SI_info, sib1); // configure timers and constant nr_rrc_set_sib1_timers_and_constants(&rrc->timers_and_constants, sib1); nr_rrc_mac_config_req_sib1(rrc->ue_id, 0, sib1->si_SchedulingInfo, sib1->servingCellConfigCommon); break; case NR_BCCH_DL_SCH_MessageType__c1_PR_systemInformation: LOG_I(NR_RRC, "[UE %ld] Decoding SI\n", rrc->ue_id); NR_SystemInformation_t *si = bcch_message->message.choice.c1->choice.systemInformation; nr_decode_SI(SI_info, si); SEQUENCE_free(&asn_DEF_NR_BCCH_DL_SCH_Message, (void *)bcch_message, 1); break; case NR_BCCH_DL_SCH_MessageType__c1_PR_NOTHING: default: break; } } VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_UE_DECODE_BCCH, VCD_FUNCTION_OUT ); return 0; } static void nr_rrc_manage_rlc_bearers(const NR_UE_RRC_INST_t *rrc, const NR_CellGroupConfig_t *cellGroupConfig, rrcPerNB_t *nb) { if (cellGroupConfig->rlc_BearerToReleaseList != NULL) { for (int i = 0; i < cellGroupConfig->rlc_BearerToReleaseList->list.count; i++) { NR_LogicalChannelIdentity_t *lcid = cellGroupConfig->rlc_BearerToReleaseList->list.array[i]; AssertFatal(lcid, "LogicalChannelIdentity shouldn't be null here\n"); nr_rlc_release_entity(rrc->ue_id, *lcid); } } if (cellGroupConfig->rlc_BearerToAddModList != NULL) { for (int i = 0; i < cellGroupConfig->rlc_BearerToAddModList->list.count; i++) { NR_RLC_BearerConfig_t *rlc_bearer = cellGroupConfig->rlc_BearerToAddModList->list.array[i]; NR_LogicalChannelIdentity_t lcid = rlc_bearer->logicalChannelIdentity; if (nb->active_RLC_entity[lcid]) { if (rlc_bearer->reestablishRLC) nr_rlc_reestablish_entity(rrc->ue_id, lcid); nr_rlc_reconfigure_entity(rrc->ue_id, lcid, rlc_bearer->rlc_Config); } else { nb->active_RLC_entity[lcid] = true; AssertFatal(rlc_bearer->servedRadioBearer, "servedRadioBearer mandatory in case of setup\n"); AssertFatal(rlc_bearer->servedRadioBearer->present != NR_RLC_BearerConfig__servedRadioBearer_PR_NOTHING, "Invalid RB for RLC configuration\n"); if (rlc_bearer->servedRadioBearer->present == NR_RLC_BearerConfig__servedRadioBearer_PR_srb_Identity) { NR_SRB_Identity_t srb_id = rlc_bearer->servedRadioBearer->choice.srb_Identity; nr_rlc_add_srb(rrc->ue_id, srb_id, rlc_bearer); } else { // DRB NR_DRB_Identity_t drb_id = rlc_bearer->servedRadioBearer->choice.drb_Identity; nr_rlc_add_drb(rrc->ue_id, drb_id, rlc_bearer); } } } } nr_rrc_mac_config_req_ue_logicalChannelBearer(rrc->ue_id, cellGroupConfig->rlc_BearerToAddModList, cellGroupConfig->rlc_BearerToReleaseList); } void nr_rrc_cellgroup_configuration(rrcPerNB_t *rrcNB, NR_UE_RRC_INST_t *rrc, NR_CellGroupConfig_t *cellGroupConfig) { NR_UE_Timers_Constants_t *tac = &rrc->timers_and_constants; NR_SpCellConfig_t *spCellConfig = cellGroupConfig->spCellConfig; if(spCellConfig != NULL) { if (spCellConfig->reconfigurationWithSync != NULL) { NR_ReconfigurationWithSync_t *reconfigurationWithSync = spCellConfig->reconfigurationWithSync; // perform Reconfiguration with sync according to 5.3.5.5.2 if (!rrc->as_security_activated && rrc->nrRrcState != RRC_STATE_IDLE_NR) { // perform the actions upon going to RRC_IDLE as specified in 5.3.11 // with the release cause 'other' upon which the procedure ends // TODO } if (tac->T310_active) { tac->T310_active = false; tac->T310_cnt = 0; } nr_rrc_set_T304(&rrc->timers_and_constants, reconfigurationWithSync); tac->T304_active = true; tac->T304_cnt = 0; rrc->rnti = reconfigurationWithSync->newUE_Identity; // resume suspended radio bearers for (int i = 0; i < NR_NUM_SRB; i++) { if (rrcNB->Srb[i] == RB_SUSPENDED) rrcNB->Srb[i] = RB_ESTABLISHED; } for (int i = 0; i < MAX_DRBS_PER_UE; i++) { if (rrcNB->status_DRBs[i] == RB_SUSPENDED) rrcNB->status_DRBs[i] = RB_ESTABLISHED; } // TODO reset MAC } nr_rrc_handle_SetupRelease_RLF_TimersAndConstants(rrc, spCellConfig->rlf_TimersAndConstants); if (spCellConfig->spCellConfigDedicated) { if (spCellConfig->spCellConfigDedicated->firstActiveDownlinkBWP_Id) rrc->dl_bwp_id = *spCellConfig->spCellConfigDedicated->firstActiveDownlinkBWP_Id; if (spCellConfig->spCellConfigDedicated->uplinkConfig && spCellConfig->spCellConfigDedicated->uplinkConfig->firstActiveUplinkBWP_Id) rrc->dl_bwp_id = *spCellConfig->spCellConfigDedicated->uplinkConfig->firstActiveUplinkBWP_Id; } } // TODO verify why we need this limitation if (get_softmodem_params()->sa || get_softmodem_params()->nsa) nr_rrc_manage_rlc_bearers(rrc, cellGroupConfig, rrcNB); AssertFatal(cellGroupConfig->sCellToReleaseList == NULL, "Secondary serving cell release not implemented\n"); AssertFatal(cellGroupConfig->sCellToAddModList == NULL, "Secondary serving cell addition not implemented\n"); } static void nr_rrc_ue_process_masterCellGroup(NR_UE_RRC_INST_t *rrc, rrcPerNB_t *rrcNB, OCTET_STRING_t *masterCellGroup, long *fullConfig) { AssertFatal(!fullConfig, "fullConfig not supported yet\n"); NR_CellGroupConfig_t *cellGroupConfig = NULL; uper_decode(NULL, &asn_DEF_NR_CellGroupConfig, //might be added prefix later (void **)&cellGroupConfig, (uint8_t *)masterCellGroup->buf, masterCellGroup->size, 0, 0); if (LOG_DEBUGFLAG(DEBUG_ASN1)) { xer_fprint(stdout, &asn_DEF_NR_CellGroupConfig, (const void *) cellGroupConfig); } nr_rrc_cellgroup_configuration(rrcNB, rrc, cellGroupConfig); LOG_D(RRC,"Sending CellGroupConfig to MAC\n"); nr_rrc_mac_config_req_cg(rrc->ue_id, 0, cellGroupConfig); } static void rrc_ue_generate_RRCSetupComplete(const NR_UE_RRC_INST_t *rrc, const uint8_t Transaction_id) { uint8_t buffer[100]; uint8_t size; const char *nas_msg; int nas_msg_length; if (get_softmodem_params()->sa) { as_nas_info_t initialNasMsg; nr_ue_nas_t *nas = get_ue_nas_info(rrc->ue_id); generateRegistrationRequest(&initialNasMsg, nas); nas_msg = (char*)initialNasMsg.data; nas_msg_length = initialNasMsg.length; } else { nas_msg = nr_nas_attach_req_imsi_dummy_NSA_case; nas_msg_length = sizeof(nr_nas_attach_req_imsi_dummy_NSA_case); } size = do_RRCSetupComplete(buffer, sizeof(buffer), Transaction_id, rrc->selected_plmn_identity, nas_msg_length, nas_msg); LOG_I(NR_RRC, "[UE %ld][RAPROC] Logical Channel UL-DCCH (SRB1), Generating RRCSetupComplete (bytes%d)\n", rrc->ue_id, size); int srb_id = 1; // RRC setup complete on SRB1 LOG_D(NR_RRC, "[RRC_UE %ld] PDCP_DATA_REQ/%d Bytes RRCSetupComplete ---> %d\n", rrc->ue_id, size, srb_id); nr_pdcp_data_req_srb(rrc->ue_id, srb_id, 0, size, buffer, deliver_pdu_srb_rlc, NULL); } static void nr_rrc_process_rrcsetup(NR_UE_RRC_INST_t *rrc, const uint8_t gNB_index, const NR_RRCSetup_t *rrcSetup) { // if the RRCSetup is received in response to an RRCReestablishmentRequest // or RRCResumeRequest or RRCResumeRequest1 // TODO none of the procedures implemented yet // perform the cell group configuration procedure in accordance with the received masterCellGroup nr_rrc_ue_process_masterCellGroup(rrc, rrc->perNB + gNB_index, &rrcSetup->criticalExtensions.choice.rrcSetup->masterCellGroup, NULL); // perform the radio bearer configuration procedure in accordance with the received radioBearerConfig nr_rrc_ue_process_RadioBearerConfig(rrc, rrc->perNB + gNB_index, &rrcSetup->criticalExtensions.choice.rrcSetup->radioBearerConfig); // TODO (not handled) if stored, discard the cell reselection priority information provided by // the cellReselectionPriorities or inherited from another RAT // stop timer T300, T301 or T319 if running; NR_UE_Timers_Constants_t *timers = &rrc->timers_and_constants; timers->T300_active = false; timers->T300_cnt = 0; timers->T301_active = false; timers->T301_cnt = 0; timers->T319_active = false; timers->T319_cnt = 0; timers->T320_active = false; timers->T320_cnt = 0; // TODO if T390 and T302 are running (not implemented) // if the RRCSetup is received in response to an RRCResumeRequest, RRCResumeRequest1 or RRCSetupRequest // enter RRC_CONNECTED rrc->nrRrcState = RRC_STATE_CONNECTED_NR; // set the content of RRCSetupComplete message // TODO procedues described in 5.3.3.4 seems more complex than what we actualy do rrc_ue_generate_RRCSetupComplete(rrc, rrcSetup->rrc_TransactionIdentifier); } static int8_t nr_rrc_ue_decode_ccch(NR_UE_RRC_INST_t *rrc, const NRRrcMacCcchDataInd *ind, const uint8_t gNB_index) { NR_DL_CCCH_Message_t *dl_ccch_msg = NULL; asn_dec_rval_t dec_rval; int rval=0; VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_DECODE_CCCH, VCD_FUNCTION_IN); LOG_D(RRC, "[NR UE%ld] Decoding DL-CCCH message (%d bytes), State %d\n", rrc->ue_id, ind->sdu_size, rrc->nrRrcState); dec_rval = uper_decode(NULL, &asn_DEF_NR_DL_CCCH_Message, (void **)&dl_ccch_msg, ind->sdu, ind->sdu_size, 0, 0); if (LOG_DEBUGFLAG(DEBUG_ASN1)) xer_fprint(stdout, &asn_DEF_NR_DL_CCCH_Message, (void *)dl_ccch_msg); if ((dec_rval.code != RC_OK) && (dec_rval.consumed == 0)) { LOG_E(RRC, "[UE %ld] Failed to decode DL-CCCH-Message (%zu bytes)\n", rrc->ue_id, dec_rval.consumed); VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_DECODE_CCCH, VCD_FUNCTION_OUT); return -1; } if (dl_ccch_msg->message.present == NR_DL_CCCH_MessageType_PR_c1) { switch (dl_ccch_msg->message.choice.c1->present) { case NR_DL_CCCH_MessageType__c1_PR_NOTHING: LOG_I(NR_RRC, "[UE%ld] Received PR_NOTHING on DL-CCCH-Message\n", rrc->ue_id); rval = 0; break; case NR_DL_CCCH_MessageType__c1_PR_rrcReject: LOG_I(NR_RRC, "[UE%ld] Logical Channel DL-CCCH (SRB0), Received RRCReject \n", rrc->ue_id); rval = 0; break; case NR_DL_CCCH_MessageType__c1_PR_rrcSetup: LOG_I(NR_RRC, "[UE%ld][RAPROC] Logical Channel DL-CCCH (SRB0), Received NR_RRCSetup\n", rrc->ue_id); nr_rrc_process_rrcsetup(rrc, gNB_index, dl_ccch_msg->message.choice.c1->choice.rrcSetup); rval = 0; break; default: LOG_E(NR_RRC, "[UE%ld] Unknown message\n", rrc->ue_id); rval = -1; break; } } ASN_STRUCT_FREE(asn_DEF_NR_DL_CCCH_Message, dl_ccch_msg); VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_DECODE_CCCH, VCD_FUNCTION_OUT); return rval; } static void nr_rrc_ue_process_securityModeCommand(NR_UE_RRC_INST_t *ue_rrc, NR_SecurityModeCommand_t *const securityModeCommand, const uint8_t gNB_index) { int securityMode = 0; LOG_I(NR_RRC, "Receiving from SRB1 (DL-DCCH), Processing securityModeCommand (eNB %d)\n", gNB_index); NR_SecurityConfigSMC_t *securityConfigSMC = &securityModeCommand->criticalExtensions.choice.securityModeCommand->securityConfigSMC; switch (securityConfigSMC->securityAlgorithmConfig.cipheringAlgorithm) { case NR_CipheringAlgorithm_nea0: case NR_CipheringAlgorithm_nea1: case NR_CipheringAlgorithm_nea2: LOG_I(NR_RRC, "Security algorithm is set to nea%d\n", securityMode); securityMode = securityConfigSMC->securityAlgorithmConfig.cipheringAlgorithm; break; default: LOG_W(NR_RRC, "Security algorithm is set to none\n"); securityMode = NR_CipheringAlgorithm_spare1; break; } ue_rrc->cipheringAlgorithm = securityConfigSMC->securityAlgorithmConfig.cipheringAlgorithm; if (securityConfigSMC->securityAlgorithmConfig.integrityProtAlgorithm != NULL) { switch (*securityConfigSMC->securityAlgorithmConfig.integrityProtAlgorithm) { case NR_IntegrityProtAlgorithm_nia1: LOG_I(NR_RRC, "Integrity protection algorithm is set to nia1\n"); securityMode |= 1 << 5; break; case NR_IntegrityProtAlgorithm_nia2: LOG_I(NR_RRC, "Integrity protection algorithm is set to nia2\n"); securityMode |= 1 << 6; break; default: LOG_I(NR_RRC, "Integrity protection algorithm is set to none\n"); securityMode |= 0x70; break; } ue_rrc->integrityProtAlgorithm = *securityConfigSMC->securityAlgorithmConfig.integrityProtAlgorithm; } LOG_D(NR_RRC, "security mode is %x \n", securityMode); NR_UL_DCCH_Message_t ul_dcch_msg = {0}; // memset((void *)&SecurityModeCommand,0,sizeof(SecurityModeCommand_t)); ul_dcch_msg.message.present = NR_UL_DCCH_MessageType_PR_c1; asn1cCalloc(ul_dcch_msg.message.choice.c1, c1); if (securityMode >= NO_SECURITY_MODE) { LOG_I(NR_RRC, "rrc_ue_process_securityModeCommand, security mode complete case \n"); c1->present = NR_UL_DCCH_MessageType__c1_PR_securityModeComplete; } else { LOG_I(NR_RRC, "rrc_ue_process_securityModeCommand, security mode failure case \n"); c1->present = NR_UL_DCCH_MessageType__c1_PR_securityModeFailure; c1->present = NR_UL_DCCH_MessageType__c1_PR_securityModeComplete; } uint8_t kRRCenc[16] = {0}; uint8_t kUPenc[16] = {0}; uint8_t kRRCint[16] = {0}; nr_derive_key(UP_ENC_ALG, ue_rrc->cipheringAlgorithm, ue_rrc->kgnb, kUPenc); nr_derive_key(RRC_ENC_ALG, ue_rrc->cipheringAlgorithm, ue_rrc->kgnb, kRRCenc); nr_derive_key(RRC_INT_ALG, ue_rrc->integrityProtAlgorithm, ue_rrc->kgnb, kRRCint); log_dump(NR_RRC, ue_rrc->kgnb, 32, LOG_DUMP_CHAR, "driving kRRCenc, kRRCint and kUPenc from KgNB="); if (securityMode != 0xff) { uint8_t security_mode = ue_rrc->cipheringAlgorithm | (ue_rrc->integrityProtAlgorithm << 4); // configure lower layers to apply SRB integrity protection and ciphering for (int i = 1; i < NR_NUM_SRB; i++) { if (ue_rrc->perNB[gNB_index].Srb[i] == RB_ESTABLISHED) nr_pdcp_config_set_security(ue_rrc->ue_id, i, security_mode, kRRCenc, kRRCint, kUPenc); } } else { LOG_I(NR_RRC, "skipped pdcp_config_set_security() as securityMode == 0x%02x", securityMode); } if (securityModeCommand->criticalExtensions.present == NR_SecurityModeCommand__criticalExtensions_PR_securityModeCommand) { asn1cCalloc(c1->choice.securityModeComplete, modeComplete); modeComplete->rrc_TransactionIdentifier = securityModeCommand->rrc_TransactionIdentifier; modeComplete->criticalExtensions.present = NR_SecurityModeComplete__criticalExtensions_PR_securityModeComplete; asn1cCalloc(modeComplete->criticalExtensions.choice.securityModeComplete, ext); ext->nonCriticalExtension = NULL; LOG_I(NR_RRC, "Receiving from SRB1 (DL-DCCH), encoding securityModeComplete (gNB %d), rrc_TransactionIdentifier: %ld\n", gNB_index, securityModeCommand->rrc_TransactionIdentifier); uint8_t buffer[200]; asn_enc_rval_t enc_rval = uper_encode_to_buffer(&asn_DEF_NR_UL_DCCH_Message, NULL, (void *)&ul_dcch_msg, buffer, sizeof(buffer)); AssertFatal(enc_rval.encoded > 0, "ASN1 message encoding failed (%s, %jd)!\n", enc_rval.failed_type->name, enc_rval.encoded); if (LOG_DEBUGFLAG(DEBUG_ASN1)) { xer_fprint(stdout, &asn_DEF_NR_UL_DCCH_Message, (void *)&ul_dcch_msg); } log_dump(NR_RRC, buffer, 16, LOG_DUMP_CHAR, "securityModeComplete payload: "); LOG_D(NR_RRC, "securityModeComplete Encoded %zd bits (%zd bytes)\n", enc_rval.encoded, (enc_rval.encoded + 7) / 8); ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_NR_UL_DCCH_Message, &ul_dcch_msg); for (int i = 0; i < (enc_rval.encoded + 7) / 8; i++) { LOG_T(NR_RRC, "%02x.", buffer[i]); } LOG_T(NR_RRC, "\n"); // TODO the SecurityModeCommand message needs to pass the integrity protection check // for the UE to declare AS security to be activated ue_rrc->as_security_activated = true; int srb_id = 1; // SecurityModeComplete in SRB1 nr_pdcp_data_req_srb(ue_rrc->ue_id, srb_id, 0, (enc_rval.encoded + 7) / 8, buffer, deliver_pdu_srb_rlc, NULL); } else LOG_W(NR_RRC, "securityModeCommand->criticalExtensions.present (%d) != " "NR_SecurityModeCommand__criticalExtensions_PR_securityModeCommand\n", securityModeCommand->criticalExtensions.present); } //----------------------------------------------------------------------------- void nr_rrc_ue_process_measConfig(rrcPerNB_t *rrc, NR_MeasConfig_t *const measConfig) //----------------------------------------------------------------------------- { int i; long ind; NR_MeasObjectToAddMod_t *measObj = NULL; NR_ReportConfigToAddMod_t *reportConfig = NULL; if (measConfig->measObjectToRemoveList != NULL) { for (i = 0; i < measConfig->measObjectToRemoveList->list.count; i++) { ind = *measConfig->measObjectToRemoveList->list.array[i]; free(rrc->MeasObj[ind - 1]); } } if (measConfig->measObjectToAddModList != NULL) { LOG_I(NR_RRC, "Measurement Object List is present\n"); for (i = 0; i < measConfig->measObjectToAddModList->list.count; i++) { measObj = measConfig->measObjectToAddModList->list.array[i]; ind = measConfig->measObjectToAddModList->list.array[i]->measObjectId; if (rrc->MeasObj[ind - 1]) { LOG_D(NR_RRC, "Modifying measurement object %ld\n", ind); memcpy(rrc->MeasObj[ind - 1], (char *)measObj, sizeof(NR_MeasObjectToAddMod_t)); } else { LOG_I(NR_RRC, "Adding measurement object %ld\n", ind); if (measObj->measObject.present == NR_MeasObjectToAddMod__measObject_PR_measObjectNR) { rrc->MeasObj[ind - 1] = measObj; } } } LOG_I(NR_RRC, "call rrc_mac_config_req \n"); // rrc_mac_config_req_ue } if (measConfig->reportConfigToRemoveList != NULL) { for (i = 0; i < measConfig->reportConfigToRemoveList->list.count; i++) { ind = *measConfig->reportConfigToRemoveList->list.array[i]; free(rrc->ReportConfig[ind - 1]); } } if (measConfig->reportConfigToAddModList != NULL) { LOG_I(NR_RRC, "Report Configuration List is present\n"); for (i = 0; i < measConfig->reportConfigToAddModList->list.count; i++) { ind = measConfig->reportConfigToAddModList->list.array[i]->reportConfigId; reportConfig = measConfig->reportConfigToAddModList->list.array[i]; if (rrc->ReportConfig[ind - 1]) { LOG_I(NR_RRC, "Modifying Report Configuration %ld\n", ind - 1); memcpy(rrc->ReportConfig[ind - 1], (char *)measConfig->reportConfigToAddModList->list.array[i], sizeof(NR_ReportConfigToAddMod_t)); } else { LOG_D(NR_RRC, "Adding Report Configuration %ld %p \n", ind - 1, measConfig->reportConfigToAddModList->list.array[i]); if (reportConfig->reportConfig.present == NR_ReportConfigToAddMod__reportConfig_PR_reportConfigNR) { rrc->ReportConfig[ind - 1] = measConfig->reportConfigToAddModList->list.array[i]; } } } } if (measConfig->measIdToRemoveList != NULL) { for (i = 0; i < measConfig->measIdToRemoveList->list.count; i++) { ind = *measConfig->measIdToRemoveList->list.array[i]; free(rrc->MeasId[ind - 1]); } } if (measConfig->measIdToAddModList != NULL) { for (i = 0; i < measConfig->measIdToAddModList->list.count; i++) { ind = measConfig->measIdToAddModList->list.array[i]->measId; if (rrc->MeasId[ind - 1]) { LOG_D(NR_RRC, "Modifying Measurement ID %ld\n", ind - 1); memcpy(rrc->MeasId[ind - 1], (char *)measConfig->measIdToAddModList->list.array[i], sizeof(NR_MeasIdToAddMod_t)); } else { LOG_D(NR_RRC, "Adding Measurement ID %ld %p\n", ind - 1, measConfig->measIdToAddModList->list.array[i]); rrc->MeasId[ind - 1] = measConfig->measIdToAddModList->list.array[i]; } } } if (measConfig->quantityConfig != NULL) { if (rrc->QuantityConfig) { LOG_D(NR_RRC, "Modifying Quantity Configuration \n"); memcpy(rrc->QuantityConfig, (char *)measConfig->quantityConfig, sizeof(NR_QuantityConfig_t)); } else { LOG_D(NR_RRC, "Adding Quantity configuration\n"); rrc->QuantityConfig = measConfig->quantityConfig; } } if (measConfig->measGapConfig != NULL) { if (rrc->measGapConfig) { memcpy(rrc->measGapConfig, (char *)measConfig->measGapConfig, sizeof(NR_MeasGapConfig_t)); } else { rrc->measGapConfig = measConfig->measGapConfig; } } if (measConfig->s_MeasureConfig) { if (measConfig->s_MeasureConfig->present == NR_MeasConfig__s_MeasureConfig_PR_ssb_RSRP) { rrc->s_measure = measConfig->s_MeasureConfig->choice.ssb_RSRP; } else if (measConfig->s_MeasureConfig->present == NR_MeasConfig__s_MeasureConfig_PR_csi_RSRP) { rrc->s_measure = measConfig->s_MeasureConfig->choice.csi_RSRP; } } } static void nr_rrc_ue_process_RadioBearerConfig(NR_UE_RRC_INST_t *ue_rrc, rrcPerNB_t *rrcNB, NR_RadioBearerConfig_t *const radioBearerConfig) { if (LOG_DEBUGFLAG(DEBUG_ASN1)) xer_fprint(stdout, &asn_DEF_NR_RadioBearerConfig, (const void *)radioBearerConfig); if (radioBearerConfig->srb3_ToRelease) nr_pdcp_release_srb(ue_rrc->ue_id, 3); uint8_t kRRCenc[16] = {0}; uint8_t kRRCint[16] = {0}; if (ue_rrc->as_security_activated) { if (radioBearerConfig->securityConfig != NULL) { // When the field is not included, continue to use the currently configured keyToUse if (radioBearerConfig->securityConfig->keyToUse) { AssertFatal(*radioBearerConfig->securityConfig->keyToUse == NR_SecurityConfig__keyToUse_master, "Secondary key usage seems not to be implemented\n"); ue_rrc->keyToUse = *radioBearerConfig->securityConfig->keyToUse; } // When the field is not included, continue to use the currently configured security algorithm if (radioBearerConfig->securityConfig->securityAlgorithmConfig) { ue_rrc->cipheringAlgorithm = radioBearerConfig->securityConfig->securityAlgorithmConfig->cipheringAlgorithm; ue_rrc->integrityProtAlgorithm = *radioBearerConfig->securityConfig->securityAlgorithmConfig->integrityProtAlgorithm; } } nr_derive_key(RRC_ENC_ALG, ue_rrc->cipheringAlgorithm, ue_rrc->kgnb, kRRCenc); nr_derive_key(RRC_INT_ALG, ue_rrc->integrityProtAlgorithm, ue_rrc->kgnb, kRRCint); } if (radioBearerConfig->srb_ToAddModList != NULL) { for (int cnt = 0; cnt < radioBearerConfig->srb_ToAddModList->list.count; cnt++) { struct NR_SRB_ToAddMod *srb = radioBearerConfig->srb_ToAddModList->list.array[cnt]; if (rrcNB->Srb[srb->srb_Identity] == RB_NOT_PRESENT) add_srb(false, ue_rrc->ue_id, radioBearerConfig->srb_ToAddModList->list.array[cnt], ue_rrc->cipheringAlgorithm, ue_rrc->integrityProtAlgorithm, kRRCenc, kRRCint); else { AssertFatal(srb->discardOnPDCP == NULL, "discardOnPDCP not yet implemented\n"); AssertFatal(srb->reestablishPDCP == NULL, "reestablishPDCP not yet implemented\n"); if (srb->pdcp_Config && srb->pdcp_Config->t_Reordering) nr_pdcp_reconfigure_srb(ue_rrc->ue_id, srb->srb_Identity, *srb->pdcp_Config->t_Reordering); } rrcNB->Srb[srb->srb_Identity] = RB_ESTABLISHED; } } if (radioBearerConfig->drb_ToReleaseList) { for (int cnt = 0; cnt < radioBearerConfig->drb_ToReleaseList->list.count; cnt++) { NR_DRB_Identity_t *DRB_id = radioBearerConfig->drb_ToReleaseList->list.array[cnt]; if (DRB_id) nr_pdcp_release_drb(ue_rrc->ue_id, *DRB_id); } } // Establish DRBs if present if (radioBearerConfig->drb_ToAddModList != NULL) { for (int cnt = 0; cnt < radioBearerConfig->drb_ToAddModList->list.count; cnt++) { struct NR_DRB_ToAddMod *drb = radioBearerConfig->drb_ToAddModList->list.array[cnt]; int DRB_id = drb->drb_Identity; if (rrcNB->status_DRBs[DRB_id] == RB_ESTABLISHED) { AssertFatal(drb->reestablishPDCP == NULL, "reestablishPDCP not yet implemented\n"); AssertFatal(drb->recoverPDCP == NULL, "recoverPDCP not yet implemented\n"); NR_SDAP_Config_t *sdap_Config = drb->cnAssociation ? drb->cnAssociation->choice.sdap_Config : NULL; if (drb->pdcp_Config || sdap_Config) nr_pdcp_reconfigure_drb(ue_rrc->ue_id, DRB_id, drb->pdcp_Config, sdap_Config); if (drb->cnAssociation) AssertFatal(drb->cnAssociation->choice.sdap_Config == NULL, "SDAP reconfiguration not yet implemented\n"); } else { rrcNB->status_DRBs[DRB_id] = RB_ESTABLISHED; add_drb(false, ue_rrc->ue_id, radioBearerConfig->drb_ToAddModList->list.array[cnt], ue_rrc->cipheringAlgorithm, ue_rrc->integrityProtAlgorithm, kRRCenc, kRRCint); } } } // drb_ToAddModList // ue_rrc->nrRrcState = RRC_STATE_CONNECTED_NR; LOG_I(NR_RRC, "State = NR_RRC_CONNECTED\n"); } static void nr_rrc_ue_generate_RRCReconfigurationComplete(NR_UE_RRC_INST_t *rrc, const int srb_id, const uint8_t Transaction_id) { uint8_t buffer[32], size; size = do_NR_RRCReconfigurationComplete(buffer, sizeof(buffer), Transaction_id); LOG_I(NR_RRC, " Logical Channel UL-DCCH (SRB1), Generating RRCReconfigurationComplete (bytes %d)\n", size); AssertFatal(srb_id == 1 || srb_id == 3, "Invalid SRB ID %d\n", srb_id); LOG_D(RLC, "PDCP_DATA_REQ/%d Bytes (RRCReconfigurationComplete) " "--->][PDCP][RB %02d]\n", size, srb_id); nr_pdcp_data_req_srb(rrc->ue_id, srb_id, 0, size, buffer, deliver_pdu_srb_rlc, NULL); } static int nr_rrc_ue_decode_dcch(NR_UE_RRC_INST_t *rrc, const srb_id_t Srb_id, const uint8_t *const Buffer, size_t Buffer_size, const uint8_t gNB_indexP) { NR_DL_DCCH_Message_t *dl_dcch_msg = NULL; if (Srb_id != 1 && Srb_id != 2) { LOG_E(NR_RRC, "Received message on DL-DCCH (SRB%ld), should not have ...\n", Srb_id); } LOG_D(NR_RRC, "Decoding DL-DCCH Message\n"); asn_dec_rval_t dec_rval = uper_decode(NULL, &asn_DEF_NR_DL_DCCH_Message, (void **)&dl_dcch_msg, Buffer, Buffer_size, 0, 0); if ((dec_rval.code != RC_OK) && (dec_rval.consumed == 0)) { LOG_E(NR_RRC, "Failed to decode DL-DCCH (%zu bytes)\n", dec_rval.consumed); ASN_STRUCT_FREE(asn_DEF_NR_DL_DCCH_Message, dl_dcch_msg); return -1; } if (LOG_DEBUGFLAG(DEBUG_ASN1)) { xer_fprint(stdout, &asn_DEF_NR_DL_DCCH_Message, (void *)dl_dcch_msg); } switch (dl_dcch_msg->message.present) { case NR_DL_DCCH_MessageType_PR_c1: { struct NR_DL_DCCH_MessageType__c1 *c1 = dl_dcch_msg->message.choice.c1; switch (c1->present) { case NR_DL_DCCH_MessageType__c1_PR_NOTHING: LOG_I(NR_RRC, "Received PR_NOTHING on DL-DCCH-Message\n"); break; case NR_DL_DCCH_MessageType__c1_PR_rrcReconfiguration: { nr_rrc_ue_process_rrcReconfiguration(rrc, gNB_indexP, c1->choice.rrcReconfiguration); nr_rrc_ue_generate_RRCReconfigurationComplete(rrc, Srb_id, c1->choice.rrcReconfiguration->rrc_TransactionIdentifier); } break; case NR_DL_DCCH_MessageType__c1_PR_rrcResume: LOG_I(NR_RRC, "Received rrcResume on DL-DCCH-Message\n"); break; case NR_DL_DCCH_MessageType__c1_PR_rrcRelease: LOG_I(NR_RRC, "[UE %ld] Received RRC Release (gNB %d)\n", rrc->ue_id, gNB_indexP); // TODO properly implement procedures in 5.3.8.3 of 38.331 NR_Release_Cause_t cause = OTHER; nr_rrc_going_to_IDLE(rrc, cause, dl_dcch_msg->message.choice.c1->choice.rrcRelease); break; case NR_DL_DCCH_MessageType__c1_PR_ueCapabilityEnquiry: LOG_I(NR_RRC, "Received Capability Enquiry (gNB %d)\n", gNB_indexP); nr_rrc_ue_process_ueCapabilityEnquiry(rrc, c1->choice.ueCapabilityEnquiry); break; case NR_DL_DCCH_MessageType__c1_PR_rrcReestablishment: LOG_I(NR_RRC, "Logical Channel DL-DCCH (SRB1), Received RRCReestablishment\n"); nr_rrc_ue_generate_rrcReestablishmentComplete(c1->choice.rrcReestablishment); break; case NR_DL_DCCH_MessageType__c1_PR_dlInformationTransfer: { NR_DLInformationTransfer_t *dlInformationTransfer = c1->choice.dlInformationTransfer; if (dlInformationTransfer->criticalExtensions.present == NR_DLInformationTransfer__criticalExtensions_PR_dlInformationTransfer) { /* This message hold a dedicated info NAS payload, forward it to NAS */ NR_DedicatedNAS_Message_t *dedicatedNAS_Message = dlInformationTransfer->criticalExtensions.choice.dlInformationTransfer->dedicatedNAS_Message; MessageDef *ittiMsg = itti_alloc_new_message(TASK_RRC_NRUE, 0, NAS_DOWNLINK_DATA_IND); NasDlDataInd *msg = &NAS_DOWNLINK_DATA_IND(ittiMsg); msg->UEid = rrc->ue_id; msg->nasMsg.length = dedicatedNAS_Message->size; msg->nasMsg.data = dedicatedNAS_Message->buf; itti_send_msg_to_task(TASK_NAS_NRUE, rrc->ue_id, ittiMsg); dedicatedNAS_Message->buf = NULL; // to keep the buffer, up to NAS to free it } } break; case NR_DL_DCCH_MessageType__c1_PR_mobilityFromNRCommand: case NR_DL_DCCH_MessageType__c1_PR_dlDedicatedMessageSegment_r16: case NR_DL_DCCH_MessageType__c1_PR_ueInformationRequest_r16: case NR_DL_DCCH_MessageType__c1_PR_dlInformationTransferMRDC_r16: case NR_DL_DCCH_MessageType__c1_PR_loggedMeasurementConfiguration_r16: case NR_DL_DCCH_MessageType__c1_PR_spare3: case NR_DL_DCCH_MessageType__c1_PR_spare2: case NR_DL_DCCH_MessageType__c1_PR_spare1: case NR_DL_DCCH_MessageType__c1_PR_counterCheck: break; case NR_DL_DCCH_MessageType__c1_PR_securityModeCommand: LOG_I(NR_RRC, "Received securityModeCommand (gNB %d)\n", gNB_indexP); nr_rrc_ue_process_securityModeCommand(rrc, c1->choice.securityModeCommand, gNB_indexP); break; } } break; default: break; } // release memory allocation SEQUENCE_free(&asn_DEF_NR_DL_DCCH_Message, (void *)dl_dcch_msg, 1); return 0; } void nr_rrc_handle_ra_indication(NR_UE_RRC_INST_t *rrc, bool ra_succeeded) { NR_UE_Timers_Constants_t *timers = &rrc->timers_and_constants; if (ra_succeeded && timers->T304_active == true) { // successful Random Access procedure triggered by reconfigurationWithSync timers->T304_active = false; timers->T304_cnt = 0; // TODO handle the rest of procedures as described in 5.3.5.3 for when // reconfigurationWithSync is included in spCellConfig } } void *rrc_nrue_task(void *args_p) { itti_mark_task_ready(TASK_RRC_NRUE); while (1) { rrc_nrue(NULL); } } void *rrc_nrue(void *notUsed) { MessageDef *msg_p = NULL; itti_receive_msg(TASK_RRC_NRUE, &msg_p); instance_t instance = ITTI_MSG_DESTINATION_INSTANCE(msg_p); LOG_D(NR_RRC, "[UE %ld] Received %s\n", instance, ITTI_MSG_NAME(msg_p)); NR_UE_RRC_INST_t *rrc = &NR_UE_rrc_inst[instance]; AssertFatal(instance == rrc->ue_id, "Instance %ld received from ITTI doesn't matach with UE-ID %ld\n", instance, rrc->ue_id); switch (ITTI_MSG_ID(msg_p)) { case TERMINATE_MESSAGE: LOG_W(NR_RRC, " *** Exiting RRC thread\n"); itti_exit_task(); break; case MESSAGE_TEST: break; case NR_RRC_MAC_SYNC_IND: { nr_sync_msg_t sync_msg = NR_RRC_MAC_SYNC_IND(msg_p).in_sync ? IN_SYNC : OUT_OF_SYNC; NR_UE_Timers_Constants_t *tac = &rrc->timers_and_constants; handle_rlf_sync(tac, sync_msg); } break; case NRRRC_FRAME_PROCESS: LOG_D(NR_RRC, "Received %s: frame %d\n", ITTI_MSG_NAME(msg_p), NRRRC_FRAME_PROCESS(msg_p).frame); // increase the timers every 10ms (every new frame) nr_rrc_handle_timers(rrc); NR_UE_RRC_SI_INFO *SInfo = &rrc->perNB[NRRRC_FRAME_PROCESS(msg_p).gnb_id].SInfo; nr_rrc_SI_timers(SInfo); break; case NR_RRC_MAC_MSG3_IND: nr_rrc_handle_msg3_indication(rrc, NR_RRC_MAC_MSG3_IND(msg_p).rnti); break; case NR_RRC_MAC_RA_IND: LOG_D(NR_RRC, "[UE %ld] Received %s: frame %d RA %s\n", rrc->ue_id, ITTI_MSG_NAME(msg_p), NR_RRC_MAC_RA_IND(msg_p).frame, NR_RRC_MAC_RA_IND(msg_p).RA_succeeded ? "successful" : "failed"); nr_rrc_handle_ra_indication(rrc, NR_RRC_MAC_RA_IND(msg_p).RA_succeeded); break; case NR_RRC_MAC_BCCH_DATA_IND: LOG_D(NR_RRC, "[UE %ld] Received %s: gNB %d\n", rrc->ue_id, ITTI_MSG_NAME(msg_p), NR_RRC_MAC_BCCH_DATA_IND(msg_p).gnb_index); NRRrcMacBcchDataInd *bcch = &NR_RRC_MAC_BCCH_DATA_IND(msg_p); if (bcch->is_bch) nr_rrc_ue_decode_NR_BCCH_BCH_Message(rrc, bcch->gnb_index, bcch->sdu, bcch->sdu_size); else nr_rrc_ue_decode_NR_BCCH_DL_SCH_Message(rrc, bcch->gnb_index, bcch->sdu, bcch->sdu_size, bcch->rsrq, bcch->rsrp); break; case NR_RRC_MAC_CCCH_DATA_IND: { NRRrcMacCcchDataInd *ind = &NR_RRC_MAC_CCCH_DATA_IND(msg_p); nr_rrc_ue_decode_ccch(rrc, ind, 0); } break; case NR_RRC_DCCH_DATA_IND: nr_rrc_ue_decode_dcch(rrc, NR_RRC_DCCH_DATA_IND(msg_p).dcch_index, NR_RRC_DCCH_DATA_IND(msg_p).sdu_p, NR_RRC_DCCH_DATA_IND(msg_p).sdu_size, NR_RRC_DCCH_DATA_IND(msg_p).gNB_index); break; case NAS_KENB_REFRESH_REQ: memcpy(rrc->kgnb, NAS_KENB_REFRESH_REQ(msg_p).kenb, sizeof(rrc->kgnb)); break; case NAS_DETACH_REQ: if (!NAS_DETACH_REQ(msg_p).wait_release) { rrc->nrRrcState = RRC_STATE_DETACH_NR; NR_Release_Cause_t release_cause = OTHER; nr_rrc_going_to_IDLE(rrc, release_cause, NULL); } break; case NAS_UPLINK_DATA_REQ: { uint32_t length; uint8_t *buffer; NasUlDataReq *req = &NAS_UPLINK_DATA_REQ(msg_p); /* Create message for PDCP (ULInformationTransfer_t) */ length = do_NR_ULInformationTransfer(&buffer, req->nasMsg.length, req->nasMsg.data); /* Transfer data to PDCP */ // check if SRB2 is created, if yes request data_req on SRB2 // error: the remote gNB is hardcoded here rb_id_t srb_id = rrc->perNB[0].Srb[2] == RB_ESTABLISHED ? 2 : 1; nr_pdcp_data_req_srb(rrc->ue_id, srb_id, 0, length, buffer, deliver_pdu_srb_rlc, NULL); break; } default: LOG_E(NR_RRC, "[UE %ld] Received unexpected message %s\n", rrc->ue_id, ITTI_MSG_NAME(msg_p)); break; } LOG_D(NR_RRC, "[UE %ld] RRC Status %d\n", rrc->ue_id, rrc->nrRrcState); int result = itti_free(ITTI_MSG_ORIGIN_ID(msg_p), msg_p); AssertFatal(result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result); return NULL; } void nr_rrc_ue_process_sidelink_radioResourceConfig(NR_SetupRelease_SL_ConfigDedicatedNR_r16_t *sl_ConfigDedicatedNR) { //process sl_CommConfig, configure MAC/PHY for transmitting SL communication (RRC_CONNECTED) if (sl_ConfigDedicatedNR != NULL) { switch (sl_ConfigDedicatedNR->present){ case NR_SetupRelease_SL_ConfigDedicatedNR_r16_PR_setup: //TODO break; case NR_SetupRelease_SL_ConfigDedicatedNR_r16_PR_release: break; case NR_SetupRelease_SL_ConfigDedicatedNR_r16_PR_NOTHING: break; default: break; } } } static void nr_rrc_ue_process_ueCapabilityEnquiry(NR_UE_RRC_INST_t *rrc, NR_UECapabilityEnquiry_t *UECapabilityEnquiry) { NR_UL_DCCH_Message_t ul_dcch_msg = {0}; // LOG_I(NR_RRC, "Receiving from SRB1 (DL-DCCH), Processing UECapabilityEnquiry\n"); ul_dcch_msg.message.present = NR_UL_DCCH_MessageType_PR_c1; asn1cCalloc(ul_dcch_msg.message.choice.c1, c1); c1->present = NR_UL_DCCH_MessageType__c1_PR_ueCapabilityInformation; asn1cCalloc(c1->choice.ueCapabilityInformation, info); info->rrc_TransactionIdentifier = UECapabilityEnquiry->rrc_TransactionIdentifier; NR_UE_CapabilityRAT_Container_t ue_CapabilityRAT_Container = {.rat_Type = NR_RAT_Type_nr}; char *file_path = rrc->uecap_file; FILE *f = NULL; if (file_path) f = fopen(file_path, "r"); if(f){ char UE_NR_Capability_xer[65536]; size_t size = fread(UE_NR_Capability_xer, 1, sizeof UE_NR_Capability_xer, f); if (size == 0 || size == sizeof UE_NR_Capability_xer) { LOG_E(NR_RRC, "UE Capabilities XER file %s is too large (%ld)\n", file_path, size); return; } asn_dec_rval_t dec_rval = xer_decode(0, &asn_DEF_NR_UE_NR_Capability, (void *)&rrc->UECap.UE_NR_Capability, UE_NR_Capability_xer, size); assert(dec_rval.code == RC_OK); } else { rrc->UECap.UE_NR_Capability = CALLOC(1, sizeof(NR_UE_NR_Capability_t)); asn1cSequenceAdd(rrc->UECap.UE_NR_Capability->rf_Parameters.supportedBandListNR.list, NR_BandNR_t, nr_bandnr); nr_bandnr->bandNR = 1; } xer_fprint(stdout, &asn_DEF_NR_UE_NR_Capability, (void *)rrc->UECap.UE_NR_Capability); asn_enc_rval_t enc_rval = uper_encode_to_buffer(&asn_DEF_NR_UE_NR_Capability, NULL, (void *)rrc->UECap.UE_NR_Capability, &rrc->UECap.sdu[0], MAX_UE_NR_CAPABILITY_SIZE); AssertFatal (enc_rval.encoded > 0, "ASN1 message encoding failed (%s, %lu)!\n", enc_rval.failed_type->name, enc_rval.encoded); rrc->UECap.sdu_size = (enc_rval.encoded + 7) / 8; LOG_I(PHY, "[RRC]UE NR Capability encoded, %d bytes (%zd bits)\n", rrc->UECap.sdu_size, enc_rval.encoded + 7); OCTET_STRING_fromBuf(&ue_CapabilityRAT_Container.ue_CapabilityRAT_Container, (const char *)rrc->UECap.sdu, rrc->UECap.sdu_size); NR_UECapabilityEnquiry_IEs_t *ueCapabilityEnquiry_ie = UECapabilityEnquiry->criticalExtensions.choice.ueCapabilityEnquiry; if (get_softmodem_params()->nsa == 1) { OCTET_STRING_t *requestedFreqBandsNR = ueCapabilityEnquiry_ie->ue_CapabilityEnquiryExt; nsa_sendmsg_to_lte_ue(requestedFreqBandsNR->buf, requestedFreqBandsNR->size, UE_CAPABILITY_INFO); } // ue_CapabilityRAT_Container.ueCapabilityRAT_Container.buf = UE_rrc_inst[ue_mod_idP].UECapability; // ue_CapabilityRAT_Container.ueCapabilityRAT_Container.size = UE_rrc_inst[ue_mod_idP].UECapability_size; AssertFatal(UECapabilityEnquiry->criticalExtensions.present == NR_UECapabilityEnquiry__criticalExtensions_PR_ueCapabilityEnquiry, "UECapabilityEnquiry->criticalExtensions.present (%d) != UECapabilityEnquiry__criticalExtensions_PR_c1 (%d)\n", UECapabilityEnquiry->criticalExtensions.present,NR_UECapabilityEnquiry__criticalExtensions_PR_ueCapabilityEnquiry); NR_UECapabilityInformation_t *ueCapabilityInformation = ul_dcch_msg.message.choice.c1->choice.ueCapabilityInformation; ueCapabilityInformation->criticalExtensions.present = NR_UECapabilityInformation__criticalExtensions_PR_ueCapabilityInformation; asn1cCalloc(ueCapabilityInformation->criticalExtensions.choice.ueCapabilityInformation, infoIE); asn1cCalloc(infoIE->ue_CapabilityRAT_ContainerList, UEcapList); UEcapList->list.count = 0; for (int i = 0; i < ueCapabilityEnquiry_ie->ue_CapabilityRAT_RequestList.list.count; i++) { if (ueCapabilityEnquiry_ie->ue_CapabilityRAT_RequestList.list.array[i]->rat_Type == NR_RAT_Type_nr) { asn1cSeqAdd(&UEcapList->list, &ue_CapabilityRAT_Container); uint8_t buffer[500]; asn_enc_rval_t enc_rval = uper_encode_to_buffer(&asn_DEF_NR_UL_DCCH_Message, NULL, (void *)&ul_dcch_msg, buffer, 500); AssertFatal (enc_rval.encoded > 0, "ASN1 message encoding failed (%s, %jd)!\n", enc_rval.failed_type->name, enc_rval.encoded); if (LOG_DEBUGFLAG(DEBUG_ASN1)) { xer_fprint(stdout, &asn_DEF_NR_UL_DCCH_Message, (void *)&ul_dcch_msg); } LOG_I(NR_RRC, "UECapabilityInformation Encoded %zd bits (%zd bytes)\n",enc_rval.encoded,(enc_rval.encoded+7)/8); int srb_id = 1; // UECapabilityInformation on SRB1 nr_pdcp_data_req_srb(rrc->ue_id, srb_id, 0, (enc_rval.encoded + 7) / 8, buffer, deliver_pdu_srb_rlc, NULL); } } } static void nr_rrc_ue_generate_rrcReestablishmentComplete(NR_RRCReestablishment_t *rrcReestablishment) //----------------------------------------------------------------------------- { uint8_t buffer[RRC_BUFFER_SIZE] = {0}; int size = do_RRCReestablishmentComplete(buffer, RRC_BUFFER_SIZE, rrcReestablishment->rrc_TransactionIdentifier); LOG_I(NR_RRC, "[RAPROC] Logical Channel UL-DCCH (SRB1), Generating RRCReestablishmentComplete (bytes %d)\n", size); } void *recv_msgs_from_lte_ue(void *args_p) { itti_mark_task_ready (TASK_RRC_NSA_NRUE); int from_lte_ue_fd = get_from_lte_ue_fd(); for (;;) { nsa_msg_t msg; int recvLen = recvfrom(from_lte_ue_fd, &msg, sizeof(msg), MSG_WAITALL | MSG_TRUNC, NULL, NULL); if (recvLen == -1) { LOG_E(NR_RRC, "%s: recvfrom: %s\n", __func__, strerror(errno)); continue; } if (recvLen > sizeof(msg)) { LOG_E(NR_RRC, "%s: Received truncated message %d\n", __func__, recvLen); continue; } process_lte_nsa_msg(NR_UE_rrc_inst, &msg, recvLen); } return NULL; } static void nsa_rrc_ue_process_ueCapabilityEnquiry(void) { NR_UE_NR_Capability_t *UE_Capability_nr = NR_UE_rrc_inst[0].UECap.UE_NR_Capability = CALLOC(1, sizeof(NR_UE_NR_Capability_t)); NR_BandNR_t *nr_bandnr = CALLOC(1, sizeof(NR_BandNR_t)); nr_bandnr->bandNR = 78; asn1cSeqAdd(&UE_Capability_nr->rf_Parameters.supportedBandListNR.list, nr_bandnr); OAI_NR_UECapability_t *UECap = CALLOC(1, sizeof(OAI_NR_UECapability_t)); UECap->UE_NR_Capability = UE_Capability_nr; asn_enc_rval_t enc_rval = uper_encode_to_buffer(&asn_DEF_NR_UE_NR_Capability, NULL, (void *)UE_Capability_nr, &UECap->sdu[0], MAX_UE_NR_CAPABILITY_SIZE); AssertFatal (enc_rval.encoded > 0, "ASN1 message encoding failed (%s, %lu)!\n", enc_rval.failed_type->name, enc_rval.encoded); UECap->sdu_size = (enc_rval.encoded + 7) / 8; LOG_A(NR_RRC, "[NR_RRC] NRUE Capability encoded, %d bytes (%zd bits)\n", UECap->sdu_size, enc_rval.encoded + 7); NR_UE_CapabilityRAT_Container_t ue_CapabilityRAT_Container; memset(&ue_CapabilityRAT_Container, 0, sizeof(NR_UE_CapabilityRAT_Container_t)); ue_CapabilityRAT_Container.rat_Type = NR_RAT_Type_nr; OCTET_STRING_fromBuf(&ue_CapabilityRAT_Container.ue_CapabilityRAT_Container, (const char *)NR_UE_rrc_inst[0].UECap.sdu, NR_UE_rrc_inst[0].UECap.sdu_size); nsa_sendmsg_to_lte_ue(ue_CapabilityRAT_Container.ue_CapabilityRAT_Container.buf, ue_CapabilityRAT_Container.ue_CapabilityRAT_Container.size, NRUE_CAPABILITY_INFO); } static void process_lte_nsa_msg(NR_UE_RRC_INST_t *rrc, nsa_msg_t *msg, int msg_len) { if (msg_len < sizeof(msg->msg_type)) { LOG_E(RRC, "Msg_len = %d\n", msg_len); return; } LOG_D(NR_RRC, "Processing an NSA message\n"); Rrc_Msg_Type_t msg_type = msg->msg_type; uint8_t *const msg_buffer = msg->msg_buffer; msg_len -= sizeof(msg->msg_type); switch (msg_type) { case UE_CAPABILITY_ENQUIRY: { LOG_D(NR_RRC, "We are processing a %d message \n", msg_type); NR_FreqBandList_t *nr_freq_band_list = NULL; asn_dec_rval_t dec_rval = uper_decode_complete(NULL, &asn_DEF_NR_FreqBandList, (void **)&nr_freq_band_list, msg_buffer, msg_len); if ((dec_rval.code != RC_OK) && (dec_rval.consumed == 0)) { SEQUENCE_free(&asn_DEF_NR_FreqBandList, nr_freq_band_list, ASFM_FREE_EVERYTHING); LOG_E(RRC, "Failed to decode UECapabilityInfo (%zu bits)\n", dec_rval.consumed); break; } for (int i = 0; i < nr_freq_band_list->list.count; i++) { LOG_D(NR_RRC, "Received NR band information: %ld.\n", nr_freq_band_list->list.array[i]->choice.bandInformationNR->bandNR); } int dummy_msg = 0;// whatever piece of data, it will never be used by sendee LOG_D(NR_RRC, "We are calling nsa_sendmsg_to_lte_ue to send a UE_CAPABILITY_DUMMY\n"); nsa_sendmsg_to_lte_ue(&dummy_msg, sizeof(dummy_msg), UE_CAPABILITY_DUMMY); LOG_A(NR_RRC, "Sent initial NRUE Capability response to LTE UE\n"); break; } case NRUE_CAPABILITY_ENQUIRY: { LOG_I(NR_RRC, "We are processing a %d message \n", msg_type); NR_FreqBandList_t *nr_freq_band_list = NULL; asn_dec_rval_t dec_rval = uper_decode_complete(NULL, &asn_DEF_NR_FreqBandList, (void **)&nr_freq_band_list, msg_buffer, msg_len); if ((dec_rval.code != RC_OK) && (dec_rval.consumed == 0)) { SEQUENCE_free(&asn_DEF_NR_FreqBandList, nr_freq_band_list, ASFM_FREE_EVERYTHING); LOG_E(NR_RRC, "Failed to decode UECapabilityInfo (%zu bits)\n", dec_rval.consumed); break; } LOG_I(NR_RRC, "Calling nsa_rrc_ue_process_ueCapabilityEnquiry\n"); nsa_rrc_ue_process_ueCapabilityEnquiry(); break; } case RRC_MEASUREMENT_PROCEDURE: { LOG_I(NR_RRC, "We are processing a %d message \n", msg_type); LTE_MeasObjectToAddMod_t *nr_meas_obj = NULL; asn_dec_rval_t dec_rval = uper_decode_complete(NULL, &asn_DEF_NR_MeasObjectToAddMod, (void **)&nr_meas_obj, msg_buffer, msg_len); if ((dec_rval.code != RC_OK) && (dec_rval.consumed == 0)) { SEQUENCE_free(&asn_DEF_NR_MeasObjectToAddMod, nr_meas_obj, ASFM_FREE_EVERYTHING); LOG_E(RRC, "Failed to decode measurement object (%zu bits) %d\n", dec_rval.consumed, dec_rval.code); break; } LOG_D(NR_RRC, "NR carrierFreq_r15 (ssb): %ld and sub carrier spacing:%ld\n", nr_meas_obj->measObject.choice.measObjectNR_r15.carrierFreq_r15, nr_meas_obj->measObject.choice.measObjectNR_r15.rs_ConfigSSB_r15.subcarrierSpacingSSB_r15); start_oai_nrue_threads(); break; } case RRC_CONFIG_COMPLETE_REQ: { struct msg { uint32_t RadioBearer_size; uint32_t SecondaryCellGroup_size; uint8_t trans_id; uint8_t padding[3]; uint8_t buffer[]; } hdr; AssertFatal(msg_len >= sizeof(hdr), "Bad received msg\n"); memcpy(&hdr, msg_buffer, sizeof(hdr)); LOG_I(NR_RRC, "We got an RRC_CONFIG_COMPLETE_REQ\n"); uint32_t nr_RadioBearer_size = hdr.RadioBearer_size; uint32_t nr_SecondaryCellGroup_size = hdr.SecondaryCellGroup_size; AssertFatal(sizeof(hdr) + nr_RadioBearer_size + nr_SecondaryCellGroup_size <= msg_len, "nr_RadioBearerConfig1_r15 size %u nr_SecondaryCellGroupConfig_r15 size %u sizeof(hdr) %zu, msg_len = %d\n", nr_RadioBearer_size, nr_SecondaryCellGroup_size, sizeof(hdr), msg_len); NR_RRC_TransactionIdentifier_t t_id = hdr.trans_id; LOG_I(NR_RRC, "nr_RadioBearerConfig1_r15 size %d nr_SecondaryCellGroupConfig_r15 size %d t_id %ld\n", nr_RadioBearer_size, nr_SecondaryCellGroup_size, t_id); uint8_t *nr_RadioBearer_buffer = msg_buffer + offsetof(struct msg, buffer); uint8_t *nr_SecondaryCellGroup_buffer = nr_RadioBearer_buffer + nr_RadioBearer_size; process_nsa_message(NR_UE_rrc_inst, nr_SecondaryCellGroupConfig_r15, nr_SecondaryCellGroup_buffer, nr_SecondaryCellGroup_size); process_nsa_message(NR_UE_rrc_inst, nr_RadioBearerConfigX_r15, nr_RadioBearer_buffer, nr_RadioBearer_size); LOG_I(NR_RRC, "Calling do_NR_RRCReconfigurationComplete. t_id %ld \n", t_id); uint8_t buffer[RRC_BUF_SIZE]; size_t size = do_NR_RRCReconfigurationComplete_for_nsa(buffer, sizeof(buffer), t_id); nsa_sendmsg_to_lte_ue(buffer, size, NR_RRC_CONFIG_COMPLETE_REQ); break; } case OAI_TUN_IFACE_NSA: { LOG_I(NR_RRC, "We got an OAI_TUN_IFACE_NSA!!\n"); char cmd_line[RRC_BUF_SIZE]; memcpy(cmd_line, msg_buffer, sizeof(cmd_line)); LOG_D(NR_RRC, "Command line: %s\n", cmd_line); if (background_system(cmd_line) != 0) { LOG_E(NR_RRC, "ESM-PROC - failed command '%s'", cmd_line); } break; } default: LOG_E(NR_RRC, "No NSA Message Found\n"); } } void nr_rrc_going_to_IDLE(NR_UE_RRC_INST_t *rrc, NR_Release_Cause_t release_cause, NR_RRCRelease_t *RRCRelease) { NR_UE_Timers_Constants_t *tac = &rrc->timers_and_constants; // if going to RRC_IDLE was triggered by reception // of the RRCRelease message including a waitTime NR_RejectWaitTime_t *waitTime = NULL; if (RRCRelease) { struct NR_RRCRelease_IEs *rrcReleaseIEs = RRCRelease->criticalExtensions.choice.rrcRelease; if(rrcReleaseIEs) { waitTime = rrcReleaseIEs->nonCriticalExtension ? rrcReleaseIEs->nonCriticalExtension->waitTime : NULL; if (waitTime) { if (tac->T302_active) tac->T302_cnt = 0; // stop 302 // start timer T302 with the value set to the waitTime tac->T302_active = true; tac->T302_k = *waitTime * 1000; // waitTime is in seconds // TODO inform upper layers that access barring is applicable // for all access categories except categories '0' and '2'. LOG_E(NR_RRC,"Go to IDLE. Handling RRCRelease message including a waitTime not implemented\n"); } } } if (!waitTime) { if (tac->T302_active) { tac->T302_cnt = 0; tac->T302_active = false; // TODO barring alleviation as in 5.3.14.4 // not implemented LOG_E(NR_RRC,"Go to IDLE. Barring alleviation not implemented\n"); } } if (tac->T390_active) { tac->T390_cnt = 0; tac->T390_active = false; // TODO barring alleviation as in 5.3.14.4 // not implemented LOG_E(NR_RRC,"Go to IDLE. Barring alleviation not implemented\n"); } if (!RRCRelease && rrc->nrRrcState == RRC_STATE_INACTIVE_NR) { // TODO discard the cell reselection priority information provided by the cellReselectionPriorities // cell reselection priorities not implemented yet if (tac->T320_active) { tac->T320_cnt = 0; tac->T320_active = false; } } // Stop all the timers except T302, T320 and T325 tac->T300_active = false; tac->T300_cnt = 0; tac->T301_active = false; tac->T301_cnt = 0; tac->T304_active = false; tac->T304_cnt = 0; tac->T310_active = false; tac->T310_cnt = 0; tac->T311_active = false; tac->T311_cnt = 0; tac->T319_active = false; tac->T319_cnt = 0; // discard the UE Inactive AS context // TODO there is no inactive AS context // release the suspendConfig // TODO suspendConfig not handled yet // discard the keys (only kgnb is stored) memset(rrc->kgnb, 0, sizeof(rrc->kgnb)); // release all radio resources, including release of the RLC entity, // the MAC configuration and the associated PDCP entity // and SDAP for all established RBs for (int j = 0; j < NB_CNX_UE; j++) { rrcPerNB_t *nb = &rrc->perNB[j]; for (int i = 0; i < MAX_DRBS_PER_UE; i++) { if (nb->status_DRBs[i] != RB_NOT_PRESENT) { nb->status_DRBs[i] = RB_NOT_PRESENT; nr_pdcp_release_drb(rrc->ue_id, i); } } for (int i = 1; i < NR_NUM_SRB; i++) { if (nb->Srb[i] != RB_NOT_PRESENT) { nb->Srb[i] = RB_NOT_PRESENT; nr_pdcp_release_srb(rrc->ue_id, i); } } for (int i = 0; i < NR_MAX_NUM_LCID; i++) { if (nb->active_RLC_entity[i]) { nb->active_RLC_entity[i] = false; nr_rlc_release_entity(rrc->ue_id, i); } } } for (int i = 0; i < NB_CNX_UE; i++) { rrcPerNB_t *nb = &rrc->perNB[i]; NR_UE_RRC_SI_INFO *SI_info = &nb->SInfo; asn1cFreeStruc(asn_DEF_NR_SIB1, SI_info->sib1); asn1cFreeStruc(asn_DEF_NR_SIB2, SI_info->sib2); asn1cFreeStruc(asn_DEF_NR_SIB3, SI_info->sib3); asn1cFreeStruc(asn_DEF_NR_SIB4, SI_info->sib4); asn1cFreeStruc(asn_DEF_NR_SIB5, SI_info->sib5); asn1cFreeStruc(asn_DEF_NR_SIB6, SI_info->sib6); asn1cFreeStruc(asn_DEF_NR_SIB7, SI_info->sib7); asn1cFreeStruc(asn_DEF_NR_SIB8, SI_info->sib8); asn1cFreeStruc(asn_DEF_NR_SIB9, SI_info->sib9); asn1cFreeStruc(asn_DEF_NR_SIB10_r16, SI_info->sib10); asn1cFreeStruc(asn_DEF_NR_SIB11_r16, SI_info->sib11); asn1cFreeStruc(asn_DEF_NR_SIB12_r16, SI_info->sib12); asn1cFreeStruc(asn_DEF_NR_SIB13_r16, SI_info->sib13); asn1cFreeStruc(asn_DEF_NR_SIB14_r16, SI_info->sib14); } // reset MAC NR_UE_MAC_reset_cause_t cause = (rrc->nrRrcState == RRC_STATE_DETACH_NR) ? DETACH : GO_TO_IDLE; nr_rrc_mac_config_req_reset(rrc->ue_id, cause); // enter RRC_IDLE LOG_I(NR_RRC, "RRC moved into IDLE state\n"); if (rrc->nrRrcState != RRC_STATE_DETACH_NR) rrc->nrRrcState = RRC_STATE_IDLE_NR; rrc->rnti = 0; // Indicate the release of the RRC connection to upper layers MessageDef *msg_p = itti_alloc_new_message(TASK_RRC_NRUE, 0, NR_NAS_CONN_RELEASE_IND); NR_NAS_CONN_RELEASE_IND(msg_p).cause = release_cause; itti_send_msg_to_task(TASK_NAS_NRUE, rrc->ue_id, msg_p); } void handle_t300_expiry(NR_UE_RRC_INST_t *rrc) { // reset MAC, release the MAC configuration NR_UE_MAC_reset_cause_t cause = T300_EXPIRY; nr_rrc_mac_config_req_reset(rrc->ue_id, cause); // TODO handle connEstFailureControl // TODO inform upper layers about the failure to establish the RRC connection }