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Adding EMM information message.

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master
Pedro Alvarez 7 years ago
parent 7dd734510b
commit d913fdd499
2 changed files with 30 additions and 18 deletions
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2
srsepc/hdr/mme/s1ap_nas_transport.h
Unescape Escape View File

@ -94,7 +94,7 @@ public:
bool pack_attach_accept(ue_emm_ctx_t *ue_emm_ctx, ue_ecm_ctx_t *ue_ecm_ctx, LIBLTE_S1AP_E_RABTOBESETUPITEMCTXTSUREQ_STRUCT *erab_ctxt, struct srslte::gtpc_pdn_address_allocation_ie *paa, srslte::byte_buffer_t *nas_buffer);
bool pack_identity_request(srslte::byte_buffer_t *reply_msg, uint32_t enb_ue_s1ap_id, uint32_t mme_ue_s1ap_id);
bool pack_emm_information(srslte::byte_buffer_t *reply_msg, uint32_t enb_ue_s1ap_id, uint32_t mme_ue_s1ap_id);
bool pack_emm_information(ue_ecm_ctx_t* ue_ecm_ctx, srslte::byte_buffer_t *reply_msg);
void log_unhandled_attach_request_ies(const LIBLTE_MME_ATTACH_REQUEST_MSG_STRUCT *attach_req);
void log_unhandled_pdn_con_request_ies(const LIBLTE_MME_PDN_CONNECTIVITY_REQUEST_MSG_STRUCT *pdn_con_req);

46
srsepc/src/mme/s1ap_nas_transport.cc
Unescape Escape View File

@ -837,6 +837,13 @@ s1ap_nas_transport::handle_nas_attach_complete(srslte::byte_buffer_t *nas_msg, u
return false;
}
m_mme_gtpc->send_modify_bearer_request(&ue_ecm_ctx->erabs_ctx[act_bearer.eps_bearer_id]);
//Send reply to eNB
m_s1ap_log->console("Packing EMM infromationi\n");
*reply_flag = pack_emm_information(ue_ecm_ctx, reply_msg);
m_s1ap_log->console("Sending EMM infromation, bytes %d\n",reply_msg->N_bytes);
m_s1ap_log->info("Sending EMM infromation\n");
return true;
}
@ -1536,6 +1543,7 @@ s1ap_nas_transport::pack_attach_accept(ue_emm_ctx_t *ue_emm_ctx, ue_ecm_ctx_t *u
//Attach accept
attach_accept.eps_attach_result = LIBLTE_MME_EPS_ATTACH_RESULT_EPS_ONLY;
//attach_accept.eps_attach_result = LIBLTE_MME_EPS_ATTACH_RESULT_COMBINED_EPS_IMSI_ATTACH;
//Mandatory
//FIXME: Set t3412 from config
attach_accept.t3412.unit = LIBLTE_MME_GPRS_TIMER_UNIT_1_MINUTE; // GPRS 1 minute unit
@ -1562,6 +1570,7 @@ s1ap_nas_transport::pack_attach_accept(ue_emm_ctx_t *ue_emm_ctx, ue_ecm_ctx_t *u
attach_accept.guti.guti.m_tmsi);
//Set EMM cause to no CS available
//attach_accept.emm_cause_present=false;
attach_accept.emm_cause_present=true;
attach_accept.emm_cause=18;
@ -1611,8 +1620,8 @@ s1ap_nas_transport::pack_attach_accept(ue_emm_ctx_t *ue_emm_ctx, ue_ecm_ctx_t *u
act_def_eps_bearer_context_req.radio_prio_present = false;
act_def_eps_bearer_context_req.packet_flow_id_present = false;
act_def_eps_bearer_context_req.apn_ambr_present = false;
act_def_eps_bearer_context_req.esm_cause_present = true;
act_def_eps_bearer_context_req.esm_cause = 50;
act_def_eps_bearer_context_req.esm_cause_present = false;
//act_def_eps_bearer_context_req.esm_cause = 50;
uint8_t sec_hdr_type =2;
ue_emm_ctx->security_ctxt.dl_nas_count++;
@ -1692,7 +1701,7 @@ s1ap_nas_transport::pack_identity_request(srslte::byte_buffer_t *reply_msg, uint
}
bool
s1ap_nas_transport::pack_emm_information(srslte::byte_buffer_t *reply_msg, uint32_t enb_ue_s1ap_id, uint32_t mme_ue_s1ap_id)
s1ap_nas_transport::pack_emm_information( ue_ecm_ctx_t *ue_ecm_ctx, srslte::byte_buffer_t *reply_msg)
{
srslte::byte_buffer_t *nas_buffer = m_pool->allocate();
@ -1710,8 +1719,8 @@ s1ap_nas_transport::pack_emm_information(srslte::byte_buffer_t *reply_msg, uint3
//Setup Dw NAS structure
LIBLTE_S1AP_MESSAGE_DOWNLINKNASTRANSPORT_STRUCT *dw_nas = &init->choice.DownlinkNASTransport;
dw_nas->ext=false;
dw_nas->MME_UE_S1AP_ID.MME_UE_S1AP_ID = mme_ue_s1ap_id;//FIXME Change name
dw_nas->eNB_UE_S1AP_ID.ENB_UE_S1AP_ID = enb_ue_s1ap_id;
dw_nas->MME_UE_S1AP_ID.MME_UE_S1AP_ID = ue_ecm_ctx->mme_ue_s1ap_id;//FIXME Change name
dw_nas->eNB_UE_S1AP_ID.ENB_UE_S1AP_ID = ue_ecm_ctx->enb_ue_s1ap_id;
dw_nas->HandoverRestrictionList_present=false;
dw_nas->SubscriberProfileIDforRFP_present=false;
@ -1727,20 +1736,12 @@ s1ap_nas_transport::pack_emm_information(srslte::byte_buffer_t *reply_msg, uint3
emm_info.utc_and_local_time_zone_present = false;
emm_info.net_dst_present = false;
//Integrity check
ue_ecm_ctx_t * ue_ecm_ctx = m_s1ap->find_ue_ecm_ctx_from_mme_ue_s1ap_id(mme_ue_s1ap_id);
if(ue_ecm_ctx == NULL)
{
return false;
}
ue_emm_ctx_t * ue_emm_ctx = m_s1ap->find_ue_emm_ctx_from_imsi(ue_ecm_ctx->imsi);
if(ue_emm_ctx == NULL)
{
ue_emm_ctx_t *ue_emm_ctx = m_s1ap->find_ue_emm_ctx_from_imsi(ue_ecm_ctx->imsi);
if(ue_emm_ctx ==NULL)
return false;
}
uint8_t sec_hdr_type =2;
ue_emm_ctx->security_ctxt.dl_nas_count++;
//ue_emm_ctx->security_ctxt.dl_nas_count++;
LIBLTE_ERROR_ENUM err = liblte_mme_pack_emm_information_msg(&emm_info, sec_hdr_type, ue_emm_ctx->security_ctxt.dl_nas_count, (LIBLTE_BYTE_MSG_STRUCT *) nas_buffer);
if(err != LIBLTE_SUCCESS)
{
@ -1760,9 +1761,20 @@ s1ap_nas_transport::pack_emm_information(srslte::byte_buffer_t *reply_msg, uint3
);
memcpy(&nas_buffer->msg[1],mac,4);
//Copy NAS PDU to Downlink NAS Trasport message buffer
memcpy(dw_nas->NAS_PDU.buffer, nas_buffer->msg, nas_buffer->N_bytes);
dw_nas->NAS_PDU.n_octets = nas_buffer->N_bytes;
//Pack Downlink NAS Transport Message
err = liblte_s1ap_pack_s1ap_pdu(&tx_pdu, (LIBLTE_BYTE_MSG_STRUCT *) reply_msg);
if(err != LIBLTE_SUCCESS)
{
m_s1ap_log->error("Error packing Dw NAS Transport: EMM Info\n");
m_s1ap_log->console("Error packing Downlink NAS Transport: EMM Info\n");
return false;
}
m_s1ap_log->info("Packed \n");
m_s1ap_log->info("Packed UE EMM information\n");
return true;
}

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