You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
srsRAN_4G/srsepc/src/mme/s1ap_mngmt_proc.cc

270 lines
8.2 KiB
C++

/**
*
* \section COPYRIGHT
*
* Copyright 2013-2017 Software Radio Systems Limited
*
* \section LICENSE
*
* This file is part of srsLTE.
*
* srsLTE is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* srsLTE is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* A copy of the GNU Affero General Public License can be found in
* the LICENSE file in the top-level directory of this distribution
* and at http://www.gnu.org/licenses/.
*
*/
//#include "srslte/upper/s1ap_common.h"
#include "srslte/common/bcd_helpers.h"
#include "mme/s1ap.h"
#include "mme/s1ap_mngmt_proc.h"
namespace srsepc{
s1ap_mngmt_proc* s1ap_mngmt_proc::m_instance = NULL;
boost::mutex s1ap_mngmt_proc_instance_mutex;
s1ap_mngmt_proc::s1ap_mngmt_proc()
{
}
s1ap_mngmt_proc::~s1ap_mngmt_proc()
{
}
s1ap_mngmt_proc*
s1ap_mngmt_proc::get_instance(void)
{
boost::mutex::scoped_lock lock(s1ap_mngmt_proc_instance_mutex);
if(NULL == m_instance) {
m_instance = new s1ap_mngmt_proc();
}
return(m_instance);
}
void
s1ap_mngmt_proc::cleanup(void)
{
boost::mutex::scoped_lock lock(s1ap_mngmt_proc_instance_mutex);
if(NULL != m_instance) {
delete m_instance;
m_instance = NULL;
}
}
void
s1ap_mngmt_proc::init(void)
{
m_s1ap = s1ap::get_instance();
m_s1ap_log = m_s1ap->m_s1ap_log;
m_s1mme = m_s1ap->get_s1_mme();
m_s1ap_args = m_s1ap->m_s1ap_args;
}
bool
s1ap_mngmt_proc::handle_s1_setup_request(LIBLTE_S1AP_MESSAGE_S1SETUPREQUEST_STRUCT *msg, struct sctp_sndrcvinfo *enb_sri, srslte::byte_buffer_t *reply_buffer, bool *reply_flag)
{
enb_ctx_t enb_ctx;
LIBLTE_S1AP_S1AP_PDU_STRUCT reply_pdu;
if(!unpack_s1_setup_request(msg, &enb_ctx))
{
m_s1ap_log->error("Malformed S1 Setup Request\n");
return false;
}
//Log S1 Setup Request Info
m_s1ap_log->console("Received S1 Setup Request.\n");
m_s1ap->print_enb_ctx_info(std::string("S1 Setup Request"),enb_ctx);
//Check matching PLMNs
if(enb_ctx.plmn!=m_s1ap->get_plmn()){
m_s1ap_log->console("Sending S1 Setup Failure - Unkown PLMN\n");
m_s1ap_log->warning("Sending S1 Setup Failure - Unkown PLMN\n");
pack_s1_setup_failure(LIBLTE_S1AP_CAUSEMISC_UNKNOWN_PLMN,reply_buffer);
}
else{
enb_ctx_t *enb_ptr = m_s1ap->find_enb_ctx(enb_ctx.enb_id);
if(enb_ptr != NULL)
{
//eNB already registered
//TODO replace enb_ctx
m_s1ap_log->warning("eNB Already registered\n");
}
else
{
//new eNB
m_s1ap->add_new_enb_ctx(enb_ctx,enb_sri);
}
pack_s1_setup_response(m_s1ap_args, reply_buffer);
m_s1ap_log->console("Sending S1 Setup Response\n");
m_s1ap_log->info("Sending S1 Setup Response\n");
}
*reply_flag = true;
return true;
}
/*
* Packing/Unpacking helper functions.
*/
bool
s1ap_mngmt_proc::unpack_s1_setup_request(LIBLTE_S1AP_MESSAGE_S1SETUPREQUEST_STRUCT *msg, enb_ctx_t* enb_ctx)
{
uint8_t enb_id_bits[32];
uint32_t plmn = 0;
uint16_t tac, bplmn;
uint32_t tmp32=0;
//eNB Name
enb_ctx->enb_name_present=msg->eNBname_present;
if(msg->eNBname_present)
{
bzero(enb_ctx->enb_name,sizeof(enb_ctx->enb_name));
memcpy(enb_ctx->enb_name,&msg->eNBname.buffer,msg->eNBname.n_octets);
}
//eNB Id
bzero(enb_id_bits,sizeof(enb_id_bits));
memcpy(&enb_id_bits[32-LIBLTE_S1AP_MACROENB_ID_BIT_STRING_LEN], msg->Global_ENB_ID.eNB_ID.choice.macroENB_ID.buffer, LIBLTE_S1AP_MACROENB_ID_BIT_STRING_LEN);
liblte_pack(enb_id_bits, 32, (uint8_t*) &tmp32);
enb_ctx->enb_id=ntohl(tmp32);
//PLMN Id
((uint8_t*)&plmn)[1] = msg->Global_ENB_ID.pLMNidentity.buffer[0];
((uint8_t*)&plmn)[2] = msg->Global_ENB_ID.pLMNidentity.buffer[1];
((uint8_t*)&plmn)[3] = msg->Global_ENB_ID.pLMNidentity.buffer[2];
enb_ctx->plmn = ntohl(plmn);
srslte::s1ap_plmn_to_mccmnc(enb_ctx->plmn, &enb_ctx->mcc, &enb_ctx->mnc);
//SupportedTAs
enb_ctx->nof_supported_ta=msg->SupportedTAs.len;
for(uint16_t i=0; i<msg->SupportedTAs.len; i++)
{
//TAC
((uint8_t*)&enb_ctx->tac[i])[0] = msg->SupportedTAs.buffer[i].tAC.buffer[0];
((uint8_t*)&enb_ctx->tac[i])[1] = msg->SupportedTAs.buffer[i].tAC.buffer[1];
enb_ctx->tac[i]=ntohs(enb_ctx->tac[i]);
enb_ctx->nof_supported_bplmns[i]=msg->SupportedTAs.buffer[i].broadcastPLMNs.len;
for (uint16_t j=0; j<msg->SupportedTAs.buffer[i].broadcastPLMNs.len; j++)
{
//BPLMNs
((uint8_t*)&enb_ctx->bplmns[i][j])[1] = msg->SupportedTAs.buffer[i].broadcastPLMNs.buffer[j].buffer[0];
((uint8_t*)&enb_ctx->bplmns[i][j])[2] = msg->SupportedTAs.buffer[i].broadcastPLMNs.buffer[j].buffer[1];
((uint8_t*)&enb_ctx->bplmns[i][j])[3] = msg->SupportedTAs.buffer[i].broadcastPLMNs.buffer[j].buffer[2];
enb_ctx->bplmns[i][j] = ntohl(enb_ctx->bplmns[i][j]);
}
}
//Default Paging DRX
enb_ctx->drx = msg->DefaultPagingDRX.e;
return true;
}
bool
s1ap_mngmt_proc::pack_s1_setup_failure(LIBLTE_S1AP_CAUSEMISC_ENUM cause, srslte::byte_buffer_t *msg)
{
LIBLTE_S1AP_S1AP_PDU_STRUCT pdu;
bzero(&pdu, sizeof(LIBLTE_S1AP_S1AP_PDU_STRUCT));
pdu.choice_type = LIBLTE_S1AP_S1AP_PDU_CHOICE_UNSUCCESSFULOUTCOME;
LIBLTE_S1AP_UNSUCCESSFULOUTCOME_STRUCT *unsucc = &pdu.choice.unsuccessfulOutcome;
unsucc->procedureCode = LIBLTE_S1AP_PROC_ID_S1SETUP;
unsucc->criticality = LIBLTE_S1AP_CRITICALITY_REJECT;
unsucc->choice_type = LIBLTE_S1AP_UNSUCCESSFULOUTCOME_CHOICE_S1SETUPFAILURE;
LIBLTE_S1AP_MESSAGE_S1SETUPFAILURE_STRUCT* s1_fail=(LIBLTE_S1AP_MESSAGE_S1SETUPFAILURE_STRUCT*)&unsucc->choice;
s1_fail->TimeToWait_present=false;
s1_fail->CriticalityDiagnostics_present=false;
s1_fail->Cause.ext=false;
s1_fail->Cause.choice_type = LIBLTE_S1AP_CAUSE_CHOICE_MISC;
s1_fail->Cause.choice.misc.ext=false;
s1_fail->Cause.choice.misc.e=cause;
liblte_s1ap_pack_s1ap_pdu(&pdu, (LIBLTE_BYTE_MSG_STRUCT*)msg);
return true;
}
bool
s1ap_mngmt_proc::pack_s1_setup_response(s1ap_args_t s1ap_args, srslte::byte_buffer_t *msg)
{
LIBLTE_S1AP_S1AP_PDU_STRUCT pdu;
bzero(&pdu, sizeof(LIBLTE_S1AP_S1AP_PDU_STRUCT));
pdu.choice_type = LIBLTE_S1AP_S1AP_PDU_CHOICE_SUCCESSFULOUTCOME;
LIBLTE_S1AP_SUCCESSFULOUTCOME_STRUCT *succ = &pdu.choice.successfulOutcome;
succ->procedureCode = LIBLTE_S1AP_PROC_ID_S1SETUP;
succ->criticality = LIBLTE_S1AP_CRITICALITY_IGNORE;
succ->choice_type = LIBLTE_S1AP_SUCCESSFULOUTCOME_CHOICE_S1SETUPRESPONSE;
LIBLTE_S1AP_MESSAGE_S1SETUPRESPONSE_STRUCT* s1_resp=(LIBLTE_S1AP_MESSAGE_S1SETUPRESPONSE_STRUCT*)&succ->choice;
s1_resp->ext=false;
//MME Name
s1_resp->MMEname_present=true;
s1_resp->MMEname.ext=false;
s1_resp->MMEname.n_octets=s1ap_args.mme_name.length();
memcpy(s1_resp->MMEname.buffer,s1ap_args.mme_name.c_str(),s1ap_args.mme_name.length());
//Served GUMEIs
s1_resp->ServedGUMMEIs.len=1;//TODO Only one served GUMMEI supported
LIBLTE_S1AP_SERVEDGUMMEISITEM_STRUCT *serv_gummei = &s1_resp->ServedGUMMEIs.buffer[0];
serv_gummei->ext=false;
serv_gummei->iE_Extensions_present = false;
uint32_t plmn=0;
srslte::s1ap_mccmnc_to_plmn(s1ap_args.mcc, s1ap_args.mnc, &plmn);
plmn=htonl(plmn);
serv_gummei->servedPLMNs.len = 1; //Only one PLMN supported
serv_gummei->servedPLMNs.buffer[0].buffer[0]=((uint8_t*)&plmn)[1];
serv_gummei->servedPLMNs.buffer[0].buffer[1]=((uint8_t*)&plmn)[2];
serv_gummei->servedPLMNs.buffer[0].buffer[2]=((uint8_t*)&plmn)[3];
serv_gummei->servedGroupIDs.len=1; //LIBLTE_S1AP_SERVEDGROUPIDS_STRUCT
uint16_t tmp=htons(s1ap_args.mme_group);
serv_gummei->servedGroupIDs.buffer[0].buffer[0]=((uint8_t*)&tmp)[0];
serv_gummei->servedGroupIDs.buffer[0].buffer[1]=((uint8_t*)&tmp)[1];
serv_gummei->servedMMECs.len=1; //Only one MMEC served
serv_gummei->servedMMECs.buffer[0].buffer[0]=s1ap_args.mme_code;
//Relative MME Capacity
s1_resp->RelativeMMECapacity.RelativeMMECapacity=255;
//Relay Unsupported
s1_resp->MMERelaySupportIndicator_present=false;
s1_resp->CriticalityDiagnostics_present = false;
liblte_s1ap_pack_s1ap_pdu(&pdu, (LIBLTE_BYTE_MSG_STRUCT*)msg);
return true;
}
} //namespace srsepc