195 lines
7.0 KiB
C
195 lines
7.0 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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*/
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/*! \file l2_nr_interface.c
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* \brief layer 2 interface, used to support different RRC sublayer
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* \author Raymond Knopp and Navid Nikaein, WEI-TAI CHEN
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* \date 2010-2014, 2018
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* \version 1.0
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* \company Eurecom, NTUST
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* \email: raymond.knopp@eurecom.fr, kroempa@gmail.com
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*/
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#include "platform_types.h"
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#include "nr_rrc_defs.h"
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#include "nr_rrc_extern.h"
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#include "common/utils/LOG/log.h"
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#include "pdcp.h"
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#include "msc.h"
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#include "common/ran_context.h"
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#include "intertask_interface.h"
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#include "NR_MIB.h"
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#include "NR_BCCH-BCH-Message.h"
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extern RAN_CONTEXT_t RC;
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int
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nr_rrc_mac_remove_ue(module_id_t mod_idP,
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rnti_t rntiP){
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// todo
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return 0;
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}
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//------------------------------------------------------------------------------
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uint8_t
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nr_rrc_data_req(
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const protocol_ctxt_t *const ctxt_pP,
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const rb_id_t rb_idP,
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const mui_t muiP,
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const confirm_t confirmP,
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const sdu_size_t sdu_sizeP,
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uint8_t *const buffer_pP,
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const pdcp_transmission_mode_t modeP
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)
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//------------------------------------------------------------------------------
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{
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if(sdu_sizeP == 255) {
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LOG_I(RRC,"sdu_sizeP == 255");
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return FALSE;
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}
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MSC_LOG_TX_MESSAGE(
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ctxt_pP->enb_flag ? MSC_RRC_ENB : MSC_RRC_UE,
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ctxt_pP->enb_flag ? MSC_PDCP_ENB : MSC_PDCP_UE,
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buffer_pP,
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sdu_sizeP,
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MSC_AS_TIME_FMT"RRC_DCCH_DATA_REQ UE %x MUI %d size %u",
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MSC_AS_TIME_ARGS(ctxt_pP),
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ctxt_pP->rnti,
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muiP,
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sdu_sizeP);
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MessageDef *message_p;
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// Uses a new buffer to avoid issue with PDCP buffer content that could be changed by PDCP (asynchronous message handling).
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uint8_t *message_buffer;
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message_buffer = itti_malloc (
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ctxt_pP->enb_flag ? TASK_RRC_ENB : TASK_RRC_UE,
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ctxt_pP->enb_flag ? TASK_PDCP_ENB : TASK_PDCP_UE,
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sdu_sizeP);
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memcpy (message_buffer, buffer_pP, sdu_sizeP);
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message_p = itti_alloc_new_message (ctxt_pP->enb_flag ? TASK_RRC_ENB : TASK_RRC_UE, 0, RRC_DCCH_DATA_REQ);
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RRC_DCCH_DATA_REQ (message_p).frame = ctxt_pP->frame;
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RRC_DCCH_DATA_REQ (message_p).enb_flag = ctxt_pP->enb_flag;
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RRC_DCCH_DATA_REQ (message_p).rb_id = rb_idP;
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RRC_DCCH_DATA_REQ (message_p).muip = muiP;
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RRC_DCCH_DATA_REQ (message_p).confirmp = confirmP;
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RRC_DCCH_DATA_REQ (message_p).sdu_size = sdu_sizeP;
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RRC_DCCH_DATA_REQ (message_p).sdu_p = message_buffer;
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//memcpy (RRC_DCCH_DATA_REQ (message_p).sdu_p, buffer_pP, sdu_sizeP);
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RRC_DCCH_DATA_REQ (message_p).mode = modeP;
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RRC_DCCH_DATA_REQ (message_p).module_id = ctxt_pP->module_id;
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RRC_DCCH_DATA_REQ (message_p).rnti = ctxt_pP->rnti;
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RRC_DCCH_DATA_REQ (message_p).eNB_index = ctxt_pP->eNB_index;
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itti_send_msg_to_task (
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ctxt_pP->enb_flag ? TASK_PDCP_ENB : TASK_PDCP_UE,
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ctxt_pP->instance,
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message_p);
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LOG_I(RRC,"sent RRC_DCCH_DATA_REQ to TASK_PDCP_ENB\n");
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/* Hack: only trigger PDCP if in CU, otherwise it is triggered by RU threads
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* Ideally, PDCP would not neet to be triggered like this but react to ITTI
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* messages automatically */
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if (ctxt_pP->enb_flag && NODE_IS_CU(RC.rrc[ctxt_pP->module_id]->node_type))
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pdcp_run(ctxt_pP);
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return TRUE; // TODO should be changed to a CNF message later, currently RRC lite does not used the returned value anyway.
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}
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int8_t mac_rrc_nr_data_req(const module_id_t Mod_idP,
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const int CC_id,
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const frame_t frameP,
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const rb_id_t Srb_id,
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const uint8_t Nb_tb,
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uint8_t *const buffer_pP ){
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asn_enc_rval_t enc_rval;
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uint8_t Sdu_size = 0;
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uint8_t sfn_msb = (uint8_t)((frameP>>4)&0x3f);
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#ifdef DEBUG_RRC
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LOG_D(RRC,"[eNB %d] mac_rrc_data_req to SRB ID=%ld\n",Mod_idP,Srb_id);
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#endif
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gNB_RRC_INST *rrc;
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rrc_gNB_carrier_data_t *carrier;
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NR_BCCH_BCH_Message_t *mib;
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NR_SRB_INFO * srb_info;
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char payload_size, *payload_pP;
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rrc = RC.nrrrc[Mod_idP];
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carrier = &rrc->carrier;
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mib = &carrier->mib;
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srb_info = &carrier->Srb0;
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/* MIBCH */
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if( (Srb_id & RAB_OFFSET ) == MIBCH) {
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mib->message.choice.mib->systemFrameNumber.buf[0] = sfn_msb << 2;
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enc_rval = uper_encode_to_buffer(&asn_DEF_NR_BCCH_BCH_Message,
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NULL,
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(void *)mib,
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carrier->MIB,
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24);
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LOG_D(NR_RRC,"Encoded MIB for frame %d sfn_msb %d (%p), bits %lu\n",frameP,sfn_msb,carrier->MIB,enc_rval.encoded);
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buffer_pP[0]=carrier->MIB[0];
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buffer_pP[1]=carrier->MIB[1];
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buffer_pP[2]=carrier->MIB[2];
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LOG_D(NR_RRC,"MIB PDU buffer_pP[0]=%x , buffer_pP[1]=%x, buffer_pP[2]=%x\n",buffer_pP[0],buffer_pP[1],buffer_pP[2]);
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AssertFatal (enc_rval.encoded > 0, "ASN1 message encoding failed (%s, %lu)!\n",
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enc_rval.failed_type->name, enc_rval.encoded);
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return(3);
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}
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/* TODO BCCH SIB1 SIBs */
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if ((Srb_id & RAB_OFFSET ) == BCCH) {
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memcpy(&buffer_pP[0],
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RC.rrc[Mod_idP]->carrier[CC_id].SIB1_MBMS,
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RC.rrc[Mod_idP]->carrier[CC_id].sizeof_SIB1_MBMS);
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}
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/* CCCH */
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if( (Srb_id & RAB_OFFSET ) == CCCH) {
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//struct rrc_eNB_ue_context_s *ue_context_p = rrc_eNB_get_ue_context(RC.rrc[Mod_idP],rnti);
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//if (ue_context_p == NULL) return(0);
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//eNB_RRC_UE_t *ue_p = &ue_context_p->ue_context;
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LOG_D(RRC,"[gNB %d] Frame %d CCCH request (Srb_id %ld)\n", Mod_idP, frameP, Srb_id);
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// srb_info=&ue_p->Srb0;
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payload_size = srb_info->Tx_buffer.payload_size;
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// check if data is there for MAC
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if (payload_size > 0) {
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payload_pP = srb_info->Tx_buffer.Payload;
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LOG_D(RRC,"[gNB %d] CCCH (%p) has %d bytes (dest: %p, src %p)\n", Mod_idP, srb_info, payload_size, buffer_pP, payload_pP);
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// Fill buffer
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memcpy((void *)buffer_pP, (void*)payload_pP, payload_size);
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Sdu_size = payload_size;
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srb_info->Tx_buffer.payload_size = 0;
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}
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return Sdu_size;
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}
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return(0);
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}
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