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openairinterface5g/openair2/LAYER2/nr_rlc/nr_rlc_oai_api.c
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/*
* 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
*/
/* from openair */
#include "rlc.h"
#include "LAYER2/nr_pdcp/nr_pdcp_oai_api.h"
/* from nr rlc module */
#include "nr_rlc_asn1_utils.h"
#include "nr_rlc_ue_manager.h"
#include "nr_rlc_entity.h"
#include "nr_rlc_oai_api.h"
#include "NR_RLC-BearerConfig.h"
#include "NR_DRB-ToAddMod.h"
#include "NR_DRB-ToAddModList.h"
#include "NR_SRB-ToAddModList.h"
#include "NR_DRB-ToReleaseList.h"
#include "NR_CellGroupConfig.h"
#include "NR_RLC-Config.h"
#include "common/ran_context.h"
#include "NR_UL-CCCH-Message.h"
#include "openair2/F1AP/f1ap_du_rrc_message_transfer.h"
#include "openair2/F1AP/f1ap_ids.h"
extern RAN_CONTEXT_t RC;
#include <stdint.h>
#include <executables/softmodem-common.h>
static nr_rlc_ue_manager_t *nr_rlc_ue_manager;
/* TODO: handle time a bit more properly */
static uint64_t nr_rlc_current_time;
static int nr_rlc_current_time_last_frame;
static int nr_rlc_current_time_last_subframe;
nr_rlc_entity_t *get_rlc_entity_from_lcid(nr_rlc_ue_t *ue,
logical_chan_id_t channel_id)
{
if (channel_id == 0)
return ue->srb0;
nr_rlc_rb_t *rb = &ue->lcid2rb[channel_id - 1];
if (rb->type == NR_RLC_SRB)
return ue->srb[rb->choice.srb_id - 1];
else {
AssertFatal(rb->type == NR_RLC_DRB,
"Invalid RB type\n");
return ue->drb[rb->choice.drb_id - 1];
}
}
void mac_rlc_data_ind(const module_id_t module_idP,
const rnti_t rntiP,
const eNB_index_t eNB_index,
const frame_t rameP,
const eNB_flag_t enb_flagP,
const MBMS_flag_t MBMS_flagP,
const logical_chan_id_t channel_idP,
char *buffer_pP,
const tb_size_t tb_sizeP,
num_tb_t num_tbP,
crc_t *crcs_pP)
{
if (module_idP != 0 || eNB_index != 0 || /*enb_flagP != 1 ||*/ MBMS_flagP != 0) {
LOG_E(RLC, "%s:%d:%s: fatal\n", __FILE__, __LINE__, __FUNCTION__);
exit(1);
}
if (enb_flagP)
T(T_ENB_RLC_MAC_UL, T_INT(module_idP), T_INT(rntiP),
T_INT(channel_idP), T_INT(tb_sizeP));
nr_rlc_manager_lock(nr_rlc_ue_manager);
nr_rlc_ue_t *ue = nr_rlc_manager_get_ue(nr_rlc_ue_manager, rntiP);
if(ue == NULL)
LOG_I(RLC, "RLC instance for the given UE was not found \n");
nr_rlc_entity_t *rb = get_rlc_entity_from_lcid(ue, channel_idP);
if (rb != NULL) {
LOG_D(RLC, "RB found! (channel ID %d) \n", channel_idP);
rb->set_time(rb, nr_rlc_current_time);
rb->recv_pdu(rb, buffer_pP, tb_sizeP);
} else {
LOG_E(RLC, "%s:%d:%s: fatal: no RB found (channel ID %d)\n",
__FILE__, __LINE__, __FUNCTION__, channel_idP);
// exit(1);
}
nr_rlc_manager_unlock(nr_rlc_ue_manager);
}
tbs_size_t mac_rlc_data_req(const module_id_t module_idP,
const rnti_t rntiP,
const eNB_index_t eNB_index,
const frame_t frameP,
const eNB_flag_t enb_flagP,
const MBMS_flag_t MBMS_flagP,
const logical_chan_id_t channel_idP,
const tb_size_t tb_sizeP,
char *buffer_pP,
const uint32_t sourceL2Id,
const uint32_t destinationL2Id)
{
int ret;
int maxsize;
nr_rlc_manager_lock(nr_rlc_ue_manager);
nr_rlc_ue_t *ue = nr_rlc_manager_get_ue(nr_rlc_ue_manager, rntiP);
nr_rlc_entity_t *rb = get_rlc_entity_from_lcid(ue, channel_idP);
if (rb != NULL) {
LOG_D(RLC, "MAC PDU to get created for channel_idP:%d \n", channel_idP);
rb->set_time(rb, nr_rlc_current_time);
maxsize = tb_sizeP;
ret = rb->generate_pdu(rb, buffer_pP, maxsize);
} else {
LOG_D(RLC, "MAC PDU failed to get created for channel_idP:%d \n", channel_idP);
ret = 0;
}
nr_rlc_manager_unlock(nr_rlc_ue_manager);
if (enb_flagP)
T(T_ENB_RLC_MAC_DL, T_INT(module_idP), T_INT(rntiP),
T_INT(channel_idP), T_INT(ret));
return ret;
}
mac_rlc_status_resp_t mac_rlc_status_ind(const module_id_t module_idP,
const rnti_t rntiP,
const eNB_index_t eNB_index,
const frame_t frameP,
const sub_frame_t subframeP,
const eNB_flag_t enb_flagP,
const MBMS_flag_t MBMS_flagP,
const logical_chan_id_t channel_idP,
const uint32_t sourceL2Id,
const uint32_t destinationL2Id)
{
mac_rlc_status_resp_t ret;
nr_rlc_manager_lock(nr_rlc_ue_manager);
nr_rlc_ue_t *ue = nr_rlc_manager_get_ue(nr_rlc_ue_manager, rntiP);
nr_rlc_entity_t *rb = get_rlc_entity_from_lcid(ue, channel_idP);
if (rb != NULL) {
nr_rlc_entity_buffer_status_t buf_stat;
rb->set_time(rb, nr_rlc_current_time);
/* 38.321 deals with BSR values up to 81338368 bytes, after what it
* reports '> 81338368' (table 6.1.3.1-2). Passing 100000000 is thus
* more than enough.
*/
// Fix me: temproary reduction meanwhile cpu cost of this computation is optimized
buf_stat = rb->buffer_status(rb, 1000*1000);
ret.bytes_in_buffer = buf_stat.status_size
+ buf_stat.retx_size
+ buf_stat.tx_size;
} else {
if (!(frameP%128) || channel_idP == 0) //to suppress this warning message
LOG_W(RLC, "[%s] Radio Bearer (channel ID %d) is NULL for UE with rntiP %x\n", __FUNCTION__, channel_idP, rntiP);
ret.bytes_in_buffer = 0;
}
nr_rlc_manager_unlock(nr_rlc_ue_manager);
ret.pdus_in_buffer = 0;
/* TODO: creation time may be important (unit: frame, as it seems) */
ret.head_sdu_creation_time = 0;
ret.head_sdu_remaining_size_to_send = 0;
ret.head_sdu_is_segmented = 0;
return ret;
}
rlc_buffer_occupancy_t mac_rlc_get_buffer_occupancy_ind(const module_id_t module_idP,
const rnti_t rntiP,
const eNB_index_t eNB_index,
const frame_t frameP,
const sub_frame_t subframeP,
const eNB_flag_t enb_flagP,
const logical_chan_id_t channel_idP)
{
rlc_buffer_occupancy_t ret;
if (enb_flagP) {
LOG_E(RLC, "Tx mac_rlc_get_buffer_occupancy_ind function is not implemented for eNB LcId=%u\n", channel_idP);
exit(1);
}
/* TODO: handle time a bit more properly */
if (nr_rlc_current_time_last_frame != frameP ||
nr_rlc_current_time_last_subframe != subframeP) {
nr_rlc_current_time++;
nr_rlc_current_time_last_frame = frameP;
nr_rlc_current_time_last_subframe = subframeP;
}
nr_rlc_manager_lock(nr_rlc_ue_manager);
nr_rlc_ue_t *ue = nr_rlc_manager_get_ue(nr_rlc_ue_manager, rntiP);
nr_rlc_entity_t *rb = get_rlc_entity_from_lcid(ue, channel_idP);
if (rb != NULL) {
nr_rlc_entity_buffer_status_t buf_stat;
rb->set_time(rb, nr_rlc_current_time);
/* 38.321 deals with BSR values up to 81338368 bytes, after what it
* reports '> 81338368' (table 6.1.3.1-2). Passing 100000000 is thus
* more than enough.
*/
// Fixme : Laurent reduced size for CPU saving
// Fix me: temproary reduction meanwhile cpu cost of this computation is optimized
buf_stat = rb->buffer_status(rb, 1000*1000);
ret = buf_stat.status_size
+ buf_stat.retx_size
+ buf_stat.tx_size;
} else {
if (!(frameP%128)) //to suppress this warning message
LOG_W(RLC, "[%s] Radio Bearer (channel ID %d) is NULL for UE with rntiP %x\n", __FUNCTION__, channel_idP, rntiP);
ret = 0;
}
nr_rlc_manager_unlock(nr_rlc_ue_manager);
return ret;
}
rlc_op_status_t rlc_data_req(const protocol_ctxt_t *const ctxt_pP,
const srb_flag_t srb_flagP,
const MBMS_flag_t MBMS_flagP,
const rb_id_t rb_idP,
const mui_t muiP,
confirm_t confirmP,
sdu_size_t sdu_sizeP,
mem_block_t *sdu_pP,
const uint32_t *const sourceL2Id,
const uint32_t *const destinationL2Id)
{
int rnti = ctxt_pP->rntiMaybeUEid;
nr_rlc_ue_t *ue;
nr_rlc_entity_t *rb;
LOG_D(RLC, "%s rnti %d srb_flag %d rb_id %ld mui %d confirm %d sdu_size %d MBMS_flag %d\n",
__FUNCTION__, rnti, srb_flagP, rb_idP, muiP, confirmP, sdu_sizeP,
MBMS_flagP);
if (ctxt_pP->enb_flag)
T(T_ENB_RLC_DL, T_INT(ctxt_pP->module_id), T_INT(ctxt_pP->rntiMaybeUEid), T_INT(rb_idP), T_INT(sdu_sizeP));
nr_rlc_manager_lock(nr_rlc_ue_manager);
ue = nr_rlc_manager_get_ue(nr_rlc_ue_manager, rnti);
rb = NULL;
if (srb_flagP) {
if (rb_idP >= 1 && rb_idP <= 2)
rb = ue->srb[rb_idP - 1];
} else {
if (rb_idP >= 1 && rb_idP <= MAX_DRBS_PER_UE)
rb = ue->drb[rb_idP - 1];
}
if (rb != NULL) {
rb->set_time(rb, nr_rlc_current_time);
rb->recv_sdu(rb, (char *)sdu_pP->data, sdu_sizeP, muiP);
} else {
LOG_E(RLC, "%s:%d:%s: fatal: SDU sent to unknown RB\n", __FILE__, __LINE__, __FUNCTION__);
}
nr_rlc_manager_unlock(nr_rlc_ue_manager);
free_mem_block(sdu_pP, __func__);
return RLC_OP_STATUS_OK;
}
int nr_rlc_get_available_tx_space(const rnti_t rntiP,
const logical_chan_id_t channel_idP)
{
int ret;
nr_rlc_manager_lock(nr_rlc_ue_manager);
nr_rlc_ue_t *ue = nr_rlc_manager_get_ue(nr_rlc_ue_manager, rntiP);
nr_rlc_entity_t *rb = get_rlc_entity_from_lcid(ue, channel_idP);
if (rb != NULL) {
ret = rb->available_tx_space(rb);
} else {
LOG_E(RLC, "[%s] Radio Bearer (channel ID %d) is NULL for UE with rntiP %x\n", __FUNCTION__, channel_idP, rntiP);
ret = -1;
}
nr_rlc_manager_unlock(nr_rlc_ue_manager);
return ret;
}
int rlc_module_init(int enb_flag)
{
static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
static int inited = 0;
static int inited_ue = 0;
if (pthread_mutex_lock(&lock)) abort();
if (enb_flag == 1 && inited) {
LOG_E(RLC, "%s:%d:%s: fatal, inited already 1\n", __FILE__, __LINE__, __FUNCTION__);
exit(1);
}
if (enb_flag == 0 && inited_ue) {
LOG_E(RLC, "%s:%d:%s: fatal, inited_ue already 1\n", __FILE__, __LINE__, __FUNCTION__);
exit(1);
}
if (enb_flag == 1) inited = 1;
if (enb_flag == 0) inited_ue = 1;
nr_rlc_ue_manager = new_nr_rlc_ue_manager(enb_flag);
if (pthread_mutex_unlock(&lock)) abort();
return 0;
}
void rlc_util_print_hex_octets(comp_name_t componentP, unsigned char *dataP, const signed long sizeP)
{
}
static void deliver_sdu(void *_ue, nr_rlc_entity_t *entity, char *buf, int size)
{
nr_rlc_ue_t *ue = _ue;
int is_srb;
int rb_id;
protocol_ctxt_t ctx;
mem_block_t *memblock;
int i;
int is_enb;
/* is it SRB? */
for (i = 0; i < sizeofArray(ue->srb); i++) {
if (entity == ue->srb[i]) {
is_srb = 1;
rb_id = i+1;
goto rb_found;
}
}
/* maybe DRB? */
for (i = 0; i < sizeofArray(ue->drb) ; i++) {
if (entity == ue->drb[i]) {
is_srb = 0;
rb_id = i+1;
goto rb_found;
}
}
LOG_E(RLC, "%s:%d:%s: fatal, no RB found for ue %d\n",
__FILE__, __LINE__, __FUNCTION__, ue->rnti);
exit(1);
rb_found:
LOG_D(RLC, "%s:%d:%s: delivering SDU (rnti %d is_srb %d rb_id %d) size %d\n",
__FILE__, __LINE__, __FUNCTION__, ue->rnti, is_srb, rb_id, size);
/* unused fields? */
ctx.instance = 0;
ctx.frame = 0;
ctx.subframe = 0;
ctx.eNB_index = 0;
ctx.brOption = 0;
is_enb = nr_rlc_manager_get_enb_flag(nr_rlc_ue_manager);
/* used fields? */
ctx.module_id = 0;
/* CU (PDCP, RRC, SDAP) use a different ID than RNTI, so below set the CU UE
* ID if in gNB, else use RNTI normally */
ctx.rntiMaybeUEid = ue->rnti;
if (is_enb) {
f1_ue_data_t ue_data = du_get_f1_ue_data(ue->rnti);
ctx.rntiMaybeUEid = ue_data.secondary_ue;
}
ctx.enb_flag = is_enb;
if (is_enb) {
T(T_ENB_RLC_UL,
T_INT(0 /*ctxt_pP->module_id*/),
T_INT(ue->rnti), T_INT(rb_id), T_INT(size));
const ngran_node_t type = RC.nrrrc[0 /*ctxt_pP->module_id*/]->node_type;
AssertFatal(!NODE_IS_CU(type),
"Can't be CU, bad node type %d\n", type);
// if (NODE_IS_DU(type) && is_srb == 0) {
// LOG_D(RLC, "call proto_agent_send_pdcp_data_ind() \n");
// proto_agent_send_pdcp_data_ind(&ctx, is_srb, 0, rb_id, size, memblock);
// return;
// }
if (NODE_IS_DU(type)) {
if(is_srb) {
MessageDef *msg;
msg = itti_alloc_new_message(TASK_RLC_ENB, 0, F1AP_UL_RRC_MESSAGE);
uint8_t *message_buffer = itti_malloc (TASK_RLC_ENB, TASK_DU_F1, size);
memcpy (message_buffer, buf, size);
F1AP_UL_RRC_MESSAGE(msg).gNB_CU_ue_id = ctx.rntiMaybeUEid;
F1AP_UL_RRC_MESSAGE(msg).gNB_DU_ue_id = ue->rnti;
F1AP_UL_RRC_MESSAGE(msg).srb_id = rb_id;
F1AP_UL_RRC_MESSAGE(msg).rrc_container = message_buffer;
F1AP_UL_RRC_MESSAGE(msg).rrc_container_length = size;
itti_send_msg_to_task(TASK_DU_F1, ENB_MODULE_ID_TO_INSTANCE(0 /*ctxt_pP->module_id*/), msg);
return;
} else {
MessageDef *msg = itti_alloc_new_message_sized(TASK_RLC_ENB, 0, GTPV1U_TUNNEL_DATA_REQ,
sizeof(gtpv1u_tunnel_data_req_t) + size);
gtpv1u_tunnel_data_req_t *req=&GTPV1U_TUNNEL_DATA_REQ(msg);
req->buffer=(uint8_t*)(req+1);
memcpy(req->buffer,buf,size);
req->length=size;
req->offset=0;
req->ue_id=ue->rnti; // use RNTI here, which GTP will use to look up TEID
req->bearer_id=rb_id;
LOG_D(RLC, "Received uplink user-plane traffic at RLC-DU to be sent to the CU, size %d \n", size);
extern instance_t DUuniqInstance;
itti_send_msg_to_task(TASK_GTPV1_U, DUuniqInstance, msg);
return;
}
}
}
/* UE or monolithic gNB */
memblock = get_free_mem_block(size, __func__);
if (memblock == NULL) {
LOG_E(RLC, "%s:%d:%s: ERROR: get_free_mem_block failed\n", __FILE__, __LINE__, __FUNCTION__);
exit(1);
}
memcpy(memblock->data, buf, size);
LOG_D(PDCP, "Calling PDCP layer from RLC in %s\n", __FUNCTION__);
if (!pdcp_data_ind(&ctx, is_srb, 0, rb_id, size, memblock, NULL, NULL)) {
LOG_E(RLC, "%s:%d:%s: ERROR: pdcp_data_ind failed\n", __FILE__, __LINE__, __FUNCTION__);
/* what to do in case of failure? for the moment: nothing */
}
}
static void successful_delivery(void *_ue, nr_rlc_entity_t *entity, int sdu_id)
{
nr_rlc_ue_t *ue = _ue;
int i;
int is_srb;
int rb_id;
#if 0
MessageDef *msg;
#endif
int is_enb;
/* is it SRB? */
for (i = 0; i < 2; i++) {
if (entity == ue->srb[i]) {
is_srb = 1;
rb_id = i+1;
goto rb_found;
}
}
/* maybe DRB? */
for (i = 0; i < MAX_DRBS_PER_UE; i++) {
if (entity == ue->drb[i]) {
is_srb = 0;
rb_id = i+1;
goto rb_found;
}
}
LOG_E(RLC, "%s:%d:%s: fatal, no RB found for ue %d\n",
__FILE__, __LINE__, __FUNCTION__, ue->rnti);
exit(1);
rb_found:
LOG_D(RLC, "sdu %d was successfully delivered on %s %d\n",
sdu_id,
is_srb ? "SRB" : "DRB",
rb_id);
/* TODO: do something for DRBs? */
if (is_srb == 0)
return;
is_enb = nr_rlc_manager_get_enb_flag(nr_rlc_ue_manager);
if (!is_enb)
return;
#if 0
msg = itti_alloc_new_message(TASK_RLC_ENB, RLC_SDU_INDICATION);
RLC_SDU_INDICATION(msg).rnti = ue->rnti;
RLC_SDU_INDICATION(msg).is_successful = 1;
RLC_SDU_INDICATION(msg).srb_id = rb_id;
RLC_SDU_INDICATION(msg).message_id = sdu_id;
/* TODO: accept more than 1 instance? here we send to instance id 0 */
itti_send_msg_to_task(TASK_RRC_ENB, 0, msg);
#endif
}
static void max_retx_reached(void *_ue, nr_rlc_entity_t *entity)
{
nr_rlc_ue_t *ue = _ue;
int i;
int is_srb;
int rb_id;
#if 0
MessageDef *msg;
#endif
int is_enb;
/* is it SRB? */
for (i = 0; i < 2; i++) {
if (entity == ue->srb[i]) {
is_srb = 1;
rb_id = i+1;
goto rb_found;
}
}
/* maybe DRB? */
for (i = 0; i < MAX_DRBS_PER_UE; i++) {
if (entity == ue->drb[i]) {
is_srb = 0;
rb_id = i+1;
goto rb_found;
}
}
LOG_E(RLC, "%s:%d:%s: fatal, no RB found for ue %d\n",
__FILE__, __LINE__, __FUNCTION__, ue->rnti);
exit(1);
rb_found:
LOG_E(RLC, "max RETX reached on %s %d\n",
is_srb ? "SRB" : "DRB",
rb_id);
/* TODO: do something for DRBs? */
if (is_srb == 0)
return;
is_enb = nr_rlc_manager_get_enb_flag(nr_rlc_ue_manager);
if (!is_enb)
return;
#if 0
msg = itti_alloc_new_message(TASK_RLC_ENB, RLC_SDU_INDICATION);
RLC_SDU_INDICATION(msg).rnti = ue->rnti;
RLC_SDU_INDICATION(msg).is_successful = 0;
RLC_SDU_INDICATION(msg).srb_id = rb_id;
RLC_SDU_INDICATION(msg).message_id = -1;
/* TODO: accept more than 1 instance? here we send to instance id 0 */
itti_send_msg_to_task(TASK_RRC_ENB, 0, msg);
#endif
}
void nr_rlc_add_srb(int rnti, int srb_id, const NR_RLC_BearerConfig_t *rlc_BearerConfig)
{
struct NR_RLC_Config *r = rlc_BearerConfig->rlc_Config;
struct NR_LogicalChannelConfig *l = rlc_BearerConfig->mac_LogicalChannelConfig;
int logical_channel_group;
int t_status_prohibit;
int t_poll_retransmit;
int poll_pdu;
int poll_byte;
int max_retx_threshold;
int t_reassembly;
int sn_field_length;
LOG_D(RLC,"Trying to add SRB %d\n",srb_id);
AssertFatal(srb_id > 0 && srb_id < 4,
"Invalid srb id %d\n", srb_id);
logical_channel_group = *l->ul_SpecificParameters->logicalChannelGroup;
/* TODO: accept other values? */
if (logical_channel_group != 0) {
LOG_E(RLC, "%s:%d:%s: fatal error\n", __FILE__, __LINE__, __FUNCTION__);
exit(1);
}
switch (r->present) {
case NR_RLC_Config_PR_am: {
struct NR_RLC_Config__am *am;
am = r->choice.am;
t_reassembly = decode_t_reassembly(am->dl_AM_RLC.t_Reassembly);
t_status_prohibit = decode_t_status_prohibit(am->dl_AM_RLC.t_StatusProhibit);
t_poll_retransmit = decode_t_poll_retransmit(am->ul_AM_RLC.t_PollRetransmit);
poll_pdu = decode_poll_pdu(am->ul_AM_RLC.pollPDU);
poll_byte = decode_poll_byte(am->ul_AM_RLC.pollByte);
max_retx_threshold = decode_max_retx_threshold(am->ul_AM_RLC.maxRetxThreshold);
if (*am->dl_AM_RLC.sn_FieldLength != *am->ul_AM_RLC.sn_FieldLength) {
LOG_E(RLC, "%s:%d:%s: fatal\n", __FILE__, __LINE__, __FUNCTION__);
exit(1);
}
sn_field_length = decode_sn_field_length_am(*am->dl_AM_RLC.sn_FieldLength);
break;
}
default:
LOG_E(RLC, "%s:%d:%s: fatal error\n", __FILE__, __LINE__, __FUNCTION__);
exit(1);
}
nr_rlc_manager_lock(nr_rlc_ue_manager);
nr_rlc_ue_t *ue = nr_rlc_manager_get_ue(nr_rlc_ue_manager, rnti);
AssertFatal(rlc_BearerConfig->servedRadioBearer &&
(rlc_BearerConfig->servedRadioBearer->present ==
NR_RLC_BearerConfig__servedRadioBearer_PR_srb_Identity),
"servedRadioBearer for SRB mandatory present when setting up an SRB RLC entity\n");
int local_id = rlc_BearerConfig->logicalChannelIdentity - 1; // LCID 0 for SRB 0 not mapped
ue->lcid2rb[local_id].type = NR_RLC_SRB;
ue->lcid2rb[local_id].choice.srb_id = rlc_BearerConfig->servedRadioBearer->choice.srb_Identity;
if (ue->srb[srb_id-1] != NULL) {
LOG_E(RLC, "%s:%d:%s: SRB %d already exists for UE with RNTI %04x, do nothing\n", __FILE__, __LINE__, __FUNCTION__, srb_id, rnti);
} else {
/* hack: hardcode values for NR */
t_poll_retransmit = 45;
t_reassembly = 35;
t_status_prohibit = 0;
poll_pdu = -1;
poll_byte = -1;
max_retx_threshold = 8;
sn_field_length = 12;
nr_rlc_entity_t *nr_rlc_am = new_nr_rlc_entity_am(RLC_RX_MAXSIZE,
RLC_TX_MAXSIZE,
deliver_sdu, ue,
successful_delivery, ue,
max_retx_reached, ue,
t_poll_retransmit,
t_reassembly, t_status_prohibit,
poll_pdu, poll_byte, max_retx_threshold,
sn_field_length);
nr_rlc_ue_add_srb_rlc_entity(ue, srb_id, nr_rlc_am);
LOG_I(RLC, "%s:%d:%s: added srb %d to UE with RNTI 0x%x\n", __FILE__, __LINE__, __FUNCTION__, srb_id, rnti);
}
nr_rlc_manager_unlock(nr_rlc_ue_manager);
}
static void add_drb_am(int rnti, int drb_id, const NR_RLC_BearerConfig_t *rlc_BearerConfig)
{
struct NR_RLC_Config *r = rlc_BearerConfig->rlc_Config;
struct NR_LogicalChannelConfig *l = rlc_BearerConfig->mac_LogicalChannelConfig;
int logical_channel_group;
int t_status_prohibit;
int t_poll_retransmit;
int poll_pdu;
int poll_byte;
int max_retx_threshold;
int t_reassembly;
int sn_field_length;
AssertFatal(drb_id > 0 && drb_id <= MAX_DRBS_PER_UE,
"Invalid DRB ID %d\n", drb_id);
logical_channel_group = *l->ul_SpecificParameters->logicalChannelGroup;
/* TODO: accept other values? */
if (logical_channel_group != 1) {
LOG_E(RLC, "%s:%d:%s: fatal error\n", __FILE__, __LINE__, __FUNCTION__);
//exit(1);
}
switch (r->present) {
case NR_RLC_Config_PR_am: {
struct NR_RLC_Config__am *am;
am = r->choice.am;
t_reassembly = decode_t_reassembly(am->dl_AM_RLC.t_Reassembly);
t_status_prohibit = decode_t_status_prohibit(am->dl_AM_RLC.t_StatusProhibit);
t_poll_retransmit = decode_t_poll_retransmit(am->ul_AM_RLC.t_PollRetransmit);
poll_pdu = decode_poll_pdu(am->ul_AM_RLC.pollPDU);
poll_byte = decode_poll_byte(am->ul_AM_RLC.pollByte);
max_retx_threshold = decode_max_retx_threshold(am->ul_AM_RLC.maxRetxThreshold);
if (*am->dl_AM_RLC.sn_FieldLength != *am->ul_AM_RLC.sn_FieldLength) {
LOG_E(RLC, "%s:%d:%s: fatal\n", __FILE__, __LINE__, __FUNCTION__);
exit(1);
}
sn_field_length = decode_sn_field_length_am(*am->dl_AM_RLC.sn_FieldLength);
break;
}
default:
LOG_E(RLC, "%s:%d:%s: fatal error\n", __FILE__, __LINE__, __FUNCTION__);
exit(1);
}
nr_rlc_manager_lock(nr_rlc_ue_manager);
nr_rlc_ue_t *ue = nr_rlc_manager_get_ue(nr_rlc_ue_manager, rnti);
AssertFatal(rlc_BearerConfig->servedRadioBearer &&
(rlc_BearerConfig->servedRadioBearer->present ==
NR_RLC_BearerConfig__servedRadioBearer_PR_drb_Identity),
"servedRadioBearer for DRB mandatory present when setting up an SRB RLC entity\n");
int local_id = rlc_BearerConfig->logicalChannelIdentity - 1; // LCID 0 for SRB 0 not mapped
ue->lcid2rb[local_id].type = NR_RLC_DRB;
ue->lcid2rb[local_id].choice.drb_id = rlc_BearerConfig->servedRadioBearer->choice.drb_Identity;
if (ue->drb[drb_id-1] != NULL) {
LOG_E(RLC, "%s:%d:%s: DRB %d already exists for UE with RNTI %04x, do nothing\n", __FILE__, __LINE__, __FUNCTION__, drb_id, rnti);
} else {
nr_rlc_entity_t *nr_rlc_am = new_nr_rlc_entity_am(RLC_RX_MAXSIZE,
RLC_TX_MAXSIZE,
deliver_sdu, ue,
successful_delivery, ue,
max_retx_reached, ue,
t_poll_retransmit,
t_reassembly, t_status_prohibit,
poll_pdu, poll_byte, max_retx_threshold,
sn_field_length);
nr_rlc_ue_add_drb_rlc_entity(ue, drb_id, nr_rlc_am);
LOG_I(RLC, "%s:%d:%s: added drb %d to UE with RNTI 0x%x\n", __FILE__, __LINE__, __FUNCTION__, drb_id, rnti);
}
nr_rlc_manager_unlock(nr_rlc_ue_manager);
}
static void add_drb_um(int rnti, int drb_id, const NR_RLC_BearerConfig_t *rlc_BearerConfig)
{
struct NR_RLC_Config *r = rlc_BearerConfig->rlc_Config;
struct NR_LogicalChannelConfig *l = rlc_BearerConfig->mac_LogicalChannelConfig;
int logical_channel_group;
int sn_field_length;
int t_reassembly;
AssertFatal(drb_id > 0 && drb_id <= MAX_DRBS_PER_UE,
"Invalid DRB ID %d\n", drb_id);
logical_channel_group = *l->ul_SpecificParameters->logicalChannelGroup;
/* TODO: accept other values? */
if (logical_channel_group != 1) {
LOG_E(RLC, "%s:%d:%s: fatal error\n", __FILE__, __LINE__, __FUNCTION__);
exit(1);
}
switch (r->present) {
case NR_RLC_Config_PR_um_Bi_Directional: {
struct NR_RLC_Config__um_Bi_Directional *um;
um = r->choice.um_Bi_Directional;
t_reassembly = decode_t_reassembly(um->dl_UM_RLC.t_Reassembly);
if (*um->dl_UM_RLC.sn_FieldLength != *um->ul_UM_RLC.sn_FieldLength) {
LOG_E(RLC, "%s:%d:%s: fatal\n", __FILE__, __LINE__, __FUNCTION__);
exit(1);
}
sn_field_length = decode_sn_field_length_um(*um->dl_UM_RLC.sn_FieldLength);
break;
}
default:
LOG_E(RLC, "%s:%d:%s: fatal error\n", __FILE__, __LINE__, __FUNCTION__);
exit(1);
}
nr_rlc_manager_lock(nr_rlc_ue_manager);
nr_rlc_ue_t *ue = nr_rlc_manager_get_ue(nr_rlc_ue_manager, rnti);
AssertFatal(rlc_BearerConfig->servedRadioBearer &&
(rlc_BearerConfig->servedRadioBearer->present ==
NR_RLC_BearerConfig__servedRadioBearer_PR_drb_Identity),
"servedRadioBearer for DRB mandatory present when setting up an SRB RLC entity\n");
int local_id = rlc_BearerConfig->logicalChannelIdentity - 1; // LCID 0 for SRB 0 not mapped
ue->lcid2rb[local_id].type = NR_RLC_DRB;
ue->lcid2rb[local_id].choice.drb_id = rlc_BearerConfig->servedRadioBearer->choice.drb_Identity;
if (ue->drb[drb_id-1] != NULL) {
LOG_E(RLC, "DEBUG add_drb_um %s:%d:%s: warning DRB %d already exist for ue %d, do nothing\n", __FILE__, __LINE__, __FUNCTION__, drb_id, rnti);
} else {
nr_rlc_entity_t *nr_rlc_um = new_nr_rlc_entity_um(RLC_RX_MAXSIZE,
RLC_TX_MAXSIZE,
deliver_sdu, ue,
t_reassembly,
sn_field_length);
nr_rlc_ue_add_drb_rlc_entity(ue, drb_id, nr_rlc_um);
LOG_D(RLC, "%s:%d:%s: added drb %d to UE with RNTI 0x%x\n", __FILE__, __LINE__, __FUNCTION__, drb_id, rnti);
}
nr_rlc_manager_unlock(nr_rlc_ue_manager);
}
void nr_rlc_add_drb(int rnti, int drb_id, const NR_RLC_BearerConfig_t *rlc_BearerConfig)
{
switch (rlc_BearerConfig->rlc_Config->present) {
case NR_RLC_Config_PR_am:
add_drb_am(rnti, drb_id, rlc_BearerConfig);
break;
case NR_RLC_Config_PR_um_Bi_Directional:
add_drb_um(rnti, drb_id, rlc_BearerConfig);
break;
default:
LOG_E(RLC, "%s:%d:%s: fatal: unhandled DRB type\n",
__FILE__, __LINE__, __FUNCTION__);
exit(1);
}
LOG_I(RLC, "%s:%s:%d: added DRB to UE with RNTI 0x%x\n", __FILE__, __FUNCTION__, __LINE__, rnti);
}
/* Dummy function due to dependency from LTE libraries */
rlc_op_status_t rrc_rlc_config_asn1_req (const protocol_ctxt_t * const ctxt_pP,
const LTE_SRB_ToAddModList_t * const srb2add_listP,
const LTE_DRB_ToAddModList_t * const drb2add_listP,
const LTE_DRB_ToReleaseList_t * const drb2release_listP,
const LTE_PMCH_InfoList_r9_t * const pmch_InfoList_r9_pP,
const uint32_t sourceL2Id,
const uint32_t destinationL2Id)
{
return 0;
}
struct srb0_data {
struct gNB_MAC_INST_s *mac;
int rnti;
void *rawUE;
void (*send_initial_ul_rrc_message)(struct gNB_MAC_INST_s *mac,
int rnti,
const uint8_t *sdu,
sdu_size_t sdu_len,
void *rawUE);
};
void deliver_sdu_srb0(void *deliver_sdu_data, struct nr_rlc_entity_t *entity,
char *buf, int size)
{
struct srb0_data *s0 = (struct srb0_data *)deliver_sdu_data;
s0->send_initial_ul_rrc_message(s0->mac, s0->rnti, (unsigned char *)buf,
size, s0->rawUE);
}
void nr_rlc_activate_srb0(int rnti, struct gNB_MAC_INST_s *mac, void *rawUE,
void (*send_initial_ul_rrc_message)(
struct gNB_MAC_INST_s *mac,
int rnti,
const uint8_t *sdu,
sdu_size_t sdu_len,
void *rawUE))
{
nr_rlc_entity_t *nr_rlc_tm;
nr_rlc_ue_t *ue;
struct srb0_data *srb0_data;
srb0_data = calloc(1, sizeof(struct srb0_data));
AssertFatal(srb0_data != NULL, "out of memory\n");
srb0_data->mac = mac;
srb0_data->rnti = rnti;
srb0_data->rawUE = rawUE;
srb0_data->send_initial_ul_rrc_message = send_initial_ul_rrc_message;
nr_rlc_manager_lock(nr_rlc_ue_manager);
ue = nr_rlc_manager_get_ue(nr_rlc_ue_manager, rnti);
if (ue->srb0 != NULL) {
LOG_W(RLC, "SRB0 already exists for UE with RNTI 0x%x, do nothing\n", rnti);
free(srb0_data);
nr_rlc_manager_unlock(nr_rlc_ue_manager);
return;
}
nr_rlc_tm = new_nr_rlc_entity_tm(10000,
deliver_sdu_srb0, srb0_data);
nr_rlc_ue_add_srb_rlc_entity(ue, 0, nr_rlc_tm);
LOG_I(RLC, "activated srb0 for UE with RNTI 0x%x\n", rnti);
nr_rlc_manager_unlock(nr_rlc_ue_manager);
}
rlc_op_status_t rrc_rlc_config_req (
const protocol_ctxt_t* const ctxt_pP,
const srb_flag_t srb_flagP,
const MBMS_flag_t mbms_flagP,
const config_action_t actionP,
const rb_id_t rb_idP)
{
nr_rlc_ue_t *ue;
int i;
if (mbms_flagP) {
LOG_E(RLC, "%s:%d:%s: todo (MBMS NOT supported)\n", __FILE__, __LINE__, __FUNCTION__);
exit(1);
}
if (actionP != CONFIG_ACTION_REMOVE) {
LOG_E(RLC, "%s:%d:%s: todo (only CONFIG_ACTION_REMOVE supported)\n", __FILE__, __LINE__, __FUNCTION__);
exit(1);
}
if (ctxt_pP->module_id) {
LOG_E(RLC, "%s:%d:%s: todo (only module_id 0 supported)\n", __FILE__, __LINE__, __FUNCTION__);
exit(1);
}
if ((srb_flagP && !(rb_idP >= 1 && rb_idP <= 2)) ||
(!srb_flagP && !(rb_idP >= 1 && rb_idP <= MAX_DRBS_PER_UE))) {
LOG_E(RLC, "%s:%d:%s: bad rb_id (%ld) (is_srb %d)\n", __FILE__, __LINE__, __FUNCTION__, rb_idP, srb_flagP);
exit(1);
}
nr_rlc_manager_lock(nr_rlc_ue_manager);
LOG_D(RLC, "%s:%d:%s: remove rb %ld (is_srb %d) for UE RNTI %lx\n", __FILE__, __LINE__, __FUNCTION__, rb_idP, srb_flagP, ctxt_pP->rntiMaybeUEid);
ue = nr_rlc_manager_get_ue(nr_rlc_ue_manager, ctxt_pP->rntiMaybeUEid);
if (srb_flagP) {
if (ue->srb[rb_idP-1] != NULL) {
ue->srb[rb_idP-1]->delete(ue->srb[rb_idP-1]);
ue->srb[rb_idP-1] = NULL;
} else
LOG_W(RLC, "removing non allocated SRB %ld, do nothing\n", rb_idP);
} else {
if (ue->drb[rb_idP-1] != NULL) {
ue->drb[rb_idP-1]->delete(ue->drb[rb_idP-1]);
ue->drb[rb_idP-1] = NULL;
} else
LOG_W(RLC, "removing non allocated DRB %ld, do nothing\n", rb_idP);
}
/* remove UE if it has no more RB configured */
for (i = 0; i < 2; i++)
if (ue->srb[i] != NULL)
break;
if (i == 2) {
for (i = 0; i < MAX_DRBS_PER_UE; i++)
if (ue->drb[i] != NULL)
break;
if (i == MAX_DRBS_PER_UE)
nr_rlc_manager_remove_ue(nr_rlc_ue_manager, ctxt_pP->rntiMaybeUEid);
}
nr_rlc_manager_unlock(nr_rlc_ue_manager);
return RLC_OP_STATUS_OK;
}
void nr_rlc_remove_ue(int rnti)
{
LOG_W(RLC, "remove UE %x\n", rnti);
nr_rlc_manager_lock(nr_rlc_ue_manager);
nr_rlc_manager_remove_ue(nr_rlc_ue_manager, rnti);
nr_rlc_manager_unlock(nr_rlc_ue_manager);
}
rlc_op_status_t rrc_rlc_remove_ue (const protocol_ctxt_t* const x)
{
nr_rlc_remove_ue(x->rntiMaybeUEid);
return RLC_OP_STATUS_OK;
}
bool nr_rlc_update_rnti(int from_rnti, int to_rnti)
{
nr_rlc_manager_lock(nr_rlc_ue_manager);
nr_rlc_ue_t *ue = nr_rlc_manager_get_ue(nr_rlc_ue_manager, from_rnti);
if (ue == NULL) {
nr_rlc_manager_unlock(nr_rlc_ue_manager);
LOG_E(RLC, "Cannot find RLC entity for UE %04x\n", from_rnti);
return false;
}
ue->rnti = to_rnti;
LOG_I(RLC, "Update old UE RNTI %04x context to RNTI %04x\n", from_rnti, to_rnti);
for (int i = 0; i < sizeof(ue->srb) / sizeof(ue->srb[0]); ++i)
if (ue->srb[i])
ue->srb[i]->reestablishment(ue->srb[i]);
for (int i = 0; i < sizeof(ue->drb) / sizeof(ue->drb[0]); ++i)
if (ue->drb[i])
ue->drb[i]->reestablishment(ue->drb[i]);
nr_rlc_manager_unlock(nr_rlc_ue_manager);
return true;
}
/* This function is for testing purposes. At least on a COTS UE, it will
* trigger a reestablishment. */
void nr_rlc_test_trigger_reestablishment(int rnti)
{
nr_rlc_manager_lock(nr_rlc_ue_manager);
nr_rlc_ue_t *ue = nr_rlc_manager_get_ue(nr_rlc_ue_manager, rnti);
if (ue == NULL) {
nr_rlc_manager_unlock(nr_rlc_ue_manager);
LOG_E(RLC, "Cannot find RLC entity for UE %04x\n", rnti);
return;
}
/* we simply assume the SRB exists, because the scheduler creates it as soon
* as the UE context is created. */
nr_rlc_entity_t *ent = ue->srb[0];
ent->reestablishment(ent);
nr_rlc_manager_unlock(nr_rlc_ue_manager);
}
void nr_rlc_tick(int frame, int subframe)
{
if (frame != nr_rlc_current_time_last_frame ||
subframe != nr_rlc_current_time_last_subframe) {
nr_rlc_current_time_last_frame = frame;
nr_rlc_current_time_last_subframe = subframe;
nr_rlc_current_time++;
}
}
/* This is a hack, to compile the gNB.
* TODO: remove it. The solution is to cleanup CMakeLists.txt
*/
void rlc_tick(int a, int b)
{
LOG_E(RLC, "%s:%d:%s: this code should not be reached\n",
__FILE__, __LINE__, __FUNCTION__);
exit(1);
}
void nr_rlc_activate_avg_time_to_tx(
const rnti_t rnti,
const logical_chan_id_t channel_id,
const bool is_on)
{
nr_rlc_ue_t *ue;
nr_rlc_entity_t *rb;
nr_rlc_manager_lock(nr_rlc_ue_manager);
ue = nr_rlc_manager_get_ue(nr_rlc_ue_manager, rnti);
switch (channel_id) {
case 1 ... 3: rb = ue->srb[channel_id - 1]; break;
case 4 ... 8: rb = ue->drb[channel_id - 4]; break;
default: rb = NULL; break;
}
if (rb != NULL) {
rb->avg_time_is_on = is_on;
time_average_reset(rb->txsdu_avg_time_to_tx);
} else {
LOG_E(RLC, "[%s] Radio Bearer (channel ID %d) is NULL for UE with rnti %x\n", __FUNCTION__, channel_id, rnti);
}
nr_rlc_manager_unlock(nr_rlc_ue_manager);
}
/* returns false in case of error, true if everything ok */
const bool nr_rlc_get_statistics(
int rnti,
int srb_flag,
int rb_id,
nr_rlc_statistics_t *out)
{
nr_rlc_ue_t *ue;
nr_rlc_entity_t *rb;
bool ret;
nr_rlc_manager_lock(nr_rlc_ue_manager);
ue = nr_rlc_manager_get_ue(nr_rlc_ue_manager, rnti);
rb = NULL;
if (srb_flag) {
if (rb_id >= 1 && rb_id <= 2)
rb = ue->srb[rb_id - 1];
} else {
if (rb_id >= 1 && rb_id <= 5)
rb = ue->drb[rb_id - 1];
}
if (rb != NULL) {
rb->get_stats(rb, out);
ret = true;
} else {
ret = false;
}
nr_rlc_manager_unlock(nr_rlc_ue_manager);
return ret;
}
void nr_rlc_srb_recv_sdu(const int rnti, const logical_chan_id_t channel_id, unsigned char *buf, int size)
{
nr_rlc_ue_t *ue;
nr_rlc_entity_t *rb;
T(T_ENB_RLC_DL, T_INT(0), T_INT(rnti), T_INT(0), T_INT(size));
nr_rlc_manager_lock(nr_rlc_ue_manager);
ue = nr_rlc_manager_get_ue(nr_rlc_ue_manager, rnti);
if (channel_id == 0) {
rb = ue->srb0;
} else {
rb = ue->srb[channel_id - 1];
}
AssertFatal(rb != NULL, "SDU sent to unknown RB RNTI %04x SRB %d\n", rnti, channel_id);
rb->set_time(rb, nr_rlc_current_time);
rb->recv_sdu(rb, (char *)buf, size, -1);
nr_rlc_manager_unlock(nr_rlc_ue_manager);
}
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