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Starting to send ESM information request msg when required.

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master
Pedro Alvarez 7 years ago
parent 0884d35378
commit 39e34a7bf9
4 changed files with 90 additions and 17 deletions
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1
srsepc/hdr/mme/s1ap.h
Unescape Escape View File

@ -88,6 +88,7 @@ public:
bool handle_nas_attach_complete(srslte::byte_buffer_t *nas_msg, srslte::byte_buffer_t *reply_msg, ue_ctx_t *ue_ctx);
void activate_eps_bearer(uint32_t mme_s1ap_id, uint8_t ebi);
bool pack_esm_information_request(srslte::byte_buffer_t* reply_msg, srsepc::ue_ctx_t* ue_ctx);
void print_enb_ctx_info(const enb_ctx_t &enb_ctx);

1
srsepc/hdr/mme/s1ap_common.h
Unescape Escape View File

@ -94,6 +94,7 @@ typedef struct{
LIBLTE_MME_UE_NETWORK_CAPABILITY_STRUCT ue_network_cap;
bool ms_network_cap_present;
LIBLTE_MME_MS_NETWORK_CAPABILITY_STRUCT ms_network_cap;
bool eit;
} ue_ctx_t;
}//namespace
#endif

92
srsepc/src/mme/s1ap.cc
Unescape Escape View File

@ -379,6 +379,9 @@ s1ap::handle_initial_ue_message(LIBLTE_S1AP_MESSAGE_INITIALUEMESSAGE_STRUCT *ini
//FIXME use this info
uint8_t eps_bearer_id = pdn_con_req.eps_bearer_id; //TODO: Unused
uint8_t proc_transaction_id = pdn_con_req.proc_transaction_id; //TODO: Transaction ID unused
//Save whether ESM information transfer is necessary
ue_ctx.eit = pdn_con_req.esm_info_transfer_flag_present;
m_s1ap_log->console("EPS Bearer id: %d\n", eps_bearer_id);
//Add eNB info to UE ctxt
@ -565,15 +568,94 @@ s1ap::handle_nas_security_mode_complete(srslte::byte_buffer_t *nas_msg, srslte::
m_s1ap_log->info("Received Security Mode Command Complete. IMSI: %lu\n", ue_ctx->imsi);
m_s1ap_log->console("Received Security Mode Command Complete. IMSI: %lu\n", ue_ctx->imsi);
//FIXME The packging of GTP-C messages is not ready.
//This means that GTP-U tunnels are created with function calls, as opposed to GTP-C.
m_mme_gtpc->send_create_session_request(ue_ctx->imsi, ue_ctx->mme_ue_s1ap_id);
if(ue_ctx->eit == true)
{
pack_esm_information_request(reply_msg, ue_ctx);
m_s1ap_log->console("Sending ESM information request\n");
}
else
{
//FIXME The packging of GTP-C messages is not ready.
//This means that GTP-U tunnels are created with function calls, as opposed to GTP-C.
m_mme_gtpc->send_create_session_request(ue_ctx->imsi, ue_ctx->mme_ue_s1ap_id);
}
return true;
}
bool
s1ap::pack_esm_information_request(srslte::byte_buffer_t *reply_msg, ue_ctx_t *ue_ctx)
{
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 = ue_ctx->mme_ue_s1ap_id;//FIXME Change name
dw_nas->eNB_UE_S1AP_ID.ENB_UE_S1AP_ID = ue_ctx->enb_ue_s1ap_id;
dw_nas->HandoverRestrictionList_present=false;
dw_nas->SubscriberProfileIDforRFP_present=false;
LIBLTE_MME_ESM_INFORMATION_REQUEST_MSG_STRUCT esm_info_req;
/*typedef struct{
uint8 eps_bearer_id;
uint8 proc_transaction_id;
}LIBLTE_MME_ESM_INFORMATION_REQUEST_MSG_STRUCT;*/
uint8_t sec_hdr_type=3;
ue_ctx->security_ctxt.dl_nas_count++;
LIBLTE_ERROR_ENUM err = liblte_mme_pack_esm_information_request_msg(&esm_info_req, (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;
}
uint8_t mac[4];
srslte::security_128_eia1 (&ue_ctx->security_ctxt.k_nas_int[16],
ue_ctx->security_ctxt.dl_nas_count,
0,
SECURITY_DIRECTION_DOWNLINK,
&nas_buffer->msg[5],
nas_buffer->N_bytes - 5,
mac
);
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: Athentication Reject\n");
m_s1ap_log->console("Error packing Downlink NAS Transport: Athentication Reject\n");
return false;
}
m_pool->deallocate(nas_buffer);
ssize_t n_sent = sctp_send(m_s1mme,reply_msg->msg, reply_msg->N_bytes, &ue_ctx->enb_sri, 0);
if(n_sent == -1)
{
m_s1ap_log->error("Failed to send NAS Attach Request");
return false;
}
return true;
}
bool
s1ap::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)

13
srsepc/src/mme/s1ap_nas_transport.cc
Unescape Escape View File

@ -277,18 +277,7 @@ s1ap_nas_transport::pack_security_mode_command(srslte::byte_buffer_t *reply_msg,
memcpy(sm_cmd.ue_security_cap.uia,ue_ctx->ue_network_cap.uia,8*sizeof(bool));
sm_cmd.ue_security_cap.gea_present = ue_ctx->ms_network_cap_present;
memcpy(sm_cmd.ue_security_cap.gea,ue_ctx->ms_network_cap.gea,8*sizeof(bool));
/*
typedef struct{
bool eea[8];
bool eia[8];
bool uea[8];
bool uea_present;
bool uia[8];
bool uia_present;
bool gea[8];
bool gea_present;
}LIBLTE_MME_UE_SECURITY_CAPABILITIES_STRUCT;
*/
sm_cmd.imeisv_req_present=false;
sm_cmd.nonce_ue_present=false;
sm_cmd.nonce_mme_present=false;

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