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srsRAN_4G
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Starting to add the response to the service request.

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master
Pedro Alvarez 7 years ago
parent 094e4a6f8e
commit c4b2dd5e65
3 changed files with 82 additions and 7 deletions
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8
srsepc/hdr/mme/s1ap_nas_transport.h
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@ -47,6 +47,7 @@ public:
bool handle_initial_ue_message(LIBLTE_S1AP_MESSAGE_INITIALUEMESSAGE_STRUCT *init_ue, struct sctp_sndrcvinfo *enb_sri, srslte::byte_buffer_t *reply_buffer, bool *reply_flag);
bool handle_uplink_nas_transport(LIBLTE_S1AP_MESSAGE_UPLINKNASTRANSPORT_STRUCT *ul_xport, struct sctp_sndrcvinfo *enb_sri, srslte::byte_buffer_t *reply_buffer, bool *reply_flag);
//Initial UE messages
bool handle_nas_attach_request( uint32_t enb_ue_s1ap_id,
const LIBLTE_MME_ATTACH_REQUEST_MSG_STRUCT &attach_req,
const LIBLTE_MME_PDN_CONNECTIVITY_REQUEST_MSG_STRUCT &pdn_con_req,
@ -65,6 +66,13 @@ public:
srslte::byte_buffer_t *reply_buffer,
bool* reply_flag,
struct sctp_sndrcvinfo *enb_sri);
bool handle_nas_service_request(uint32_t enb_ue_s1ap_id,
const LIBLTE_MME_ATTACH_REQUEST_MSG_STRUCT &attach_req,
const LIBLTE_MME_PDN_CONNECTIVITY_REQUEST_MSG_STRUCT &pdn_con_req,
srslte::byte_buffer_t *reply_buffer,
bool* reply_flag,
struct sctp_sndrcvinfo *enb_sri);
bool handle_nas_authentication_response(srslte::byte_buffer_t *nas_msg, ue_ctx_t *ue_ctx, srslte::byte_buffer_t *reply_buffer, bool* reply_flag);
bool handle_nas_security_mode_complete(srslte::byte_buffer_t *nas_msg, ue_ctx_t *ue_ctx, srslte::byte_buffer_t *reply_buffer, bool *reply_flag);
bool handle_nas_attach_complete(srslte::byte_buffer_t *nas_msg, ue_ctx_t *ue_ctx, srslte::byte_buffer_t *reply_buffer, bool *reply_flag);

4
srsepc/src/mme/s1ap.cc
Unescape Escape View File

@ -291,7 +291,9 @@ s1ap::handle_initiating_message(LIBLTE_S1AP_INITIATINGMESSAGE_STRUCT *msg, stru
ssize_t n_sent = sctp_send(m_s1mme,reply_buffer->msg, reply_buffer->N_bytes, enb_sri, 0);
if(n_sent == -1)
{
m_s1ap_log->console("Failed to send S1 Setup Setup Reply\n");
m_s1ap_log->console("Failed to send S1AP Initiating Reply.\n");
m_s1ap_log->error("Failed to send S1AP Initiating Reply. \n");
m_pool->deallocate(reply_buffer);
m_pool->deallocate(reply_buffer);
return false;
}

75
srsepc/src/mme/s1ap_nas_transport.cc
Unescape Escape View File

@ -117,7 +117,6 @@ s1ap_nas_transport::handle_initial_ue_message(LIBLTE_S1AP_MESSAGE_INITIALUEMESSA
}
handle_nas_attach_request(enb_ue_s1ap_id, attach_req,pdn_con_req,reply_buffer,reply_flag, enb_sri);
}
/*
else if(msg_type == LIBLTE_MME_SECURITY_HDR_TYPE_SERVICE_REQUEST)
{
m_s1ap_log->info("Received Service Request \n");
@ -125,7 +124,7 @@ s1ap_nas_transport::handle_initial_ue_message(LIBLTE_S1AP_MESSAGE_INITIALUEMESSA
liblte_mme_unpack_service_request_msg((LIBLTE_BYTE_MSG_STRUCT*) nas_msg, &service_req);
handle_nas_service_request(enb_ue_s1ap_id, attach_req,pdn_con_req,reply_buffer,reply_flag, enb_sri);
return false;
}*/
}
m_pool->deallocate(nas_msg);
return true;
@ -424,7 +423,6 @@ s1ap_nas_transport::handle_nas_guti_attach_request(uint32_t enb_ue_s1ap_id,
return true;
}
/*
bool
s1ap_nas_transport::handle_nas_service_request(uint32_t enb_ue_s1ap_id,
const LIBLTE_MME_ATTACH_REQUEST_MSG_STRUCT &attach_req,
@ -433,8 +431,70 @@ s1ap_nas_transport::handle_nas_service_request(uint32_t enb_ue_s1ap_id,
bool* reply_flag,
struct sctp_sndrcvinfo *enb_sri)
{
m_s1ap_log->warning("Service Request not handled yet\n");
m_s1ap_log->console("Service Request not handled yet\n");
srslte::byte_buffer_t *nas_buffer = m_pool->allocate();
//Setup initiating message
LIBLTE_S1AP_S1AP_PDU_STRUCT tx_pdu;
bzero(&tx_pdu, sizeof(LIBLTE_S1AP_S1AP_PDU_STRUCT));
tx_pdu.ext = false;
tx_pdu.choice_type = LIBLTE_S1AP_S1AP_PDU_CHOICE_INITIATINGMESSAGE;
LIBLTE_S1AP_INITIATINGMESSAGE_STRUCT *init = &tx_pdu.choice.initiatingMessage;
init->procedureCode = LIBLTE_S1AP_PROC_ID_DOWNLINKNASTRANSPORT;
init->choice_type = LIBLTE_S1AP_INITIATINGMESSAGE_CHOICE_DOWNLINKNASTRANSPORT;
//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 = 16;
dw_nas->eNB_UE_S1AP_ID.ENB_UE_S1AP_ID = enb_ue_s1ap_id;
dw_nas->HandoverRestrictionList_present=false;
dw_nas->SubscriberProfileIDforRFP_present=false;
LIBLTE_MME_SERVICE_REJECT_MSG_STRUCT serv_rej;
serv_rej.t3442_present = false;
serv_rej.t3446_present = false;
serv_rej.emm_cause = 9; //UE Identity cannot be derived by the network
uint8_t sec_hdr_type = 2;
uint32_t count = 0 ;
LIBLTE_ERROR_ENUM err;
err = liblte_mme_pack_service_reject_msg(&serv_rej, sec_hdr_type, count, (LIBLTE_BYTE_MSG_STRUCT *) nas_buffer);
if(err != LIBLTE_SUCCESS)
{
m_s1ap_log->error("Error packing Athentication Reject\n");
m_s1ap_log->console("Error packing Athentication Reject\n");
return false;
}
//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_buffer);
if(err != LIBLTE_SUCCESS)
{
m_s1ap_log->error("Error packing Athentication Request\n");
m_s1ap_log->console("Error packing Athentication Request\n");
return false;
}
}*/
bool send_initial_context_setup_request(uint32_t mme_ue_s1ap_id, struct srslte::gtpc_create_session_response *cs_resp, struct srslte::gtpc_f_teid_ie sgw_ctrl_fteid);
m_pool->deallocate(nas_buffer);
//Send reply to eNB
*reply_flag = true;
m_s1ap_log->info("Downlink NAS: Sending Athentication Request\n");
m_s1ap_log->console("Downlink NAS: Sending Athentication Request\n");
return true;
}
bool
s1ap_nas_transport::handle_nas_authentication_response(srslte::byte_buffer_t *nas_msg, ue_ctx_t *ue_ctx, srslte::byte_buffer_t *reply_buffer, bool* reply_flag)
@ -1063,11 +1123,16 @@ s1ap_nas_transport::pack_attach_accept(ue_ctx_t *ue_ctx, LIBLTE_S1AP_E_RABTOBESE
attach_accept.guti.guti.mme_code,
attach_accept.guti.guti.m_tmsi);
attach_accept.t3402_present=true;
attach_accept.t3402.unit = LIBLTE_MME_GPRS_TIMER_UNIT_1_MINUTE; // GPRS 1 minute unit
attach_accept.t3402.value = 30; // 30 minute periodic timer
//Make sure all unused options are set to false
attach_accept.lai_present=false;
attach_accept.ms_id_present=false;
attach_accept.emm_cause_present=false;
attach_accept.t3402_present=false;
//attach_accept.t3402_present=false;
attach_accept.t3423_present=false;
attach_accept.equivalent_plmns_present=false;
attach_accept.emerg_num_list_present=false;

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