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Cleaning up Handle initial UE message

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master
Pedro Alvarez 6 years ago
parent de8679b536
commit bd2fa4c04b
1 changed files with 59 additions and 62 deletions
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121
srsepc/src/mme/s1ap_nas_transport.cc
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@ -84,84 +84,67 @@ s1ap_nas_transport::init(hss_interface_nas * hss_)
bool
s1ap_nas_transport::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)
{
//Get info from initial UE message
uint32_t enb_ue_s1ap_id = init_ue->eNB_UE_S1AP_ID.ENB_UE_S1AP_ID;
/*Check whether NAS Attach Request or Service Request*/
bool mac_valid = false;
bool err, mac_valid;
uint8_t pd, msg_type, sec_hdr_type;
srslte::byte_buffer_t *nas_msg = m_pool->allocate();
memcpy(nas_msg->msg, &init_ue->NAS_PDU.buffer, init_ue->NAS_PDU.n_octets);
nas_msg->N_bytes = init_ue->NAS_PDU.n_octets;
//Get info from initial UE message
uint32_t m_tmsi;
uint32_t enb_ue_s1ap_id = init_ue->eNB_UE_S1AP_ID.ENB_UE_S1AP_ID;
if (!init_ue->S_TMSI_present) {
m_tmsi = ntohl(*((uint32_t*)&init_ue->S_TMSI.m_TMSI.buffer));
}
liblte_mme_parse_msg_header((LIBLTE_BYTE_MSG_STRUCT *) nas_msg, &pd, &msg_type);
if (msg_type == LIBLTE_MME_MSG_TYPE_ATTACH_REQUEST) {
m_s1ap_log->info("Received Attach Request \n");
m_s1ap_log->console("Received Attach Request \n");
handle_nas_attach_request(enb_ue_s1ap_id, nas_msg, 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");
m_s1ap_log->console("Received Service Request \n");
if (!init_ue->S_TMSI_present) {
switch (msg_type)
{
case LIBLTE_MME_MSG_TYPE_ATTACH_REQUEST:
m_s1ap_log->console("Received Initial UE message -- Attach Request\n");
m_s1ap_log->info("Received Initial UE message -- Attach Request\n");
err = handle_nas_attach_request(enb_ue_s1ap_id, nas_msg, reply_buffer,reply_flag, enb_sri);
break;
case LIBLTE_MME_SECURITY_HDR_TYPE_SERVICE_REQUEST:
m_s1ap_log->console("Received Initial UE message -- Service Request\n");
m_s1ap_log->info("Received Initial UE message -- Service Request\n");
if (init_ue->S_TMSI_present) {
err = handle_nas_service_request(m_tmsi, enb_ue_s1ap_id, nas_msg, reply_buffer,reply_flag, enb_sri);
} else {
m_s1ap_log->error("Service request -- S-TMSI not present\n");
m_s1ap_log->console("Service request -- S-TMSI not present\n" );
return false;
err = false;
}
uint32_t *m_tmsi = (uint32_t*) &init_ue->S_TMSI.m_TMSI.buffer;
uint32_t enb_ue_s1ap_id = init_ue->eNB_UE_S1AP_ID.ENB_UE_S1AP_ID;
m_s1ap_log->info("Service request -- S-TMSI 0x%x\n", ntohl(*m_tmsi));
m_s1ap_log->console("Service request -- S-TMSI 0x%x\n", ntohl(*m_tmsi) );
m_s1ap_log->info("Service request -- eNB UE S1AP Id %d\n", enb_ue_s1ap_id);
m_s1ap_log->console("Service request -- eNB UE S1AP Id %d\n", enb_ue_s1ap_id);
handle_nas_service_request(ntohl(*m_tmsi), enb_ue_s1ap_id, nas_msg, reply_buffer,reply_flag, enb_sri);
return true;
} else if(msg_type == LIBLTE_MME_MSG_TYPE_DETACH_REQUEST) {
break;
case LIBLTE_MME_MSG_TYPE_DETACH_REQUEST:
m_s1ap_log->console("Received Initial UE message -- Detach Request\n");
m_s1ap_log->info("Received Initial UE message -- Detach Request\n");
if (!init_ue->S_TMSI_present) {
if (init_ue->S_TMSI_present) {
err = handle_nas_detach_request(m_tmsi, enb_ue_s1ap_id, nas_msg, reply_buffer,reply_flag, enb_sri);
} else {
m_s1ap_log->error("Detach request -- S-TMSI not present\n");
m_s1ap_log->console("Detach request -- S-TMSI not present\n" );
err = false;
}
break;
case LIBLTE_MME_MSG_TYPE_TRACKING_AREA_UPDATE_REQUEST:
m_s1ap_log->console("Received Initial UE message -- Tracking Area Update Request\n");
m_s1ap_log->info("Received Initial UE message -- Tracking Area Update Request\n");
if (init_ue->S_TMSI_present) {
handle_nas_tracking_area_update_request(m_tmsi, enb_ue_s1ap_id, nas_msg, reply_buffer,reply_flag, enb_sri);
} else {
m_s1ap_log->error("Tracking Area Update Request -- S-TMSI not present\n");
m_s1ap_log->console("Tracking Area Update Request -- S-TMSI not present\n" );
return false;
}
uint32_t *m_tmsi = (uint32_t*) &init_ue->S_TMSI.m_TMSI.buffer;
uint32_t enb_ue_s1ap_id = init_ue->eNB_UE_S1AP_ID.ENB_UE_S1AP_ID;
m_s1ap_log->info("Detach Request -- S-TMSI 0x%x\n", ntohl(*m_tmsi));
m_s1ap_log->console("Detach Request -- S-TMSI 0x%x\n", ntohl(*m_tmsi) );
m_s1ap_log->info("Detach Request -- eNB UE S1AP Id %d\n", enb_ue_s1ap_id);
m_s1ap_log->console("Detach Request -- eNB UE S1AP Id %d\n", enb_ue_s1ap_id);
handle_nas_detach_request(ntohl(*m_tmsi), enb_ue_s1ap_id, nas_msg, reply_buffer,reply_flag, enb_sri);
return true;
}
else if(msg_type == LIBLTE_MME_MSG_TYPE_TRACKING_AREA_UPDATE_REQUEST)
{
m_s1ap_log->console("Received Initial UE message -- Tracking Area Update Request\n");
m_s1ap_log->info("Received Initial UE message -- Tracking Area Update Request\n");
if(!init_ue->S_TMSI_present)
{
m_s1ap_log->error("Tracking Area Update Request -- S-TMSI not present\n");
m_s1ap_log->console("Tracking Area Update Request -- S-TMSI not present\n" );
return false;
}
uint32_t *m_tmsi = (uint32_t*) &init_ue->S_TMSI.m_TMSI.buffer;
uint32_t enb_ue_s1ap_id = init_ue->eNB_UE_S1AP_ID.ENB_UE_S1AP_ID;
m_s1ap_log->info("Tracking Area Update Request -- S-TMSI 0x%x\n", ntohl(*m_tmsi));
m_s1ap_log->console("Tracking Area Update Request -- S-TMSI 0x%x\n", ntohl(*m_tmsi) );
m_s1ap_log->info("Tracking Area Update Request -- eNB UE S1AP Id %d\n", enb_ue_s1ap_id);
m_s1ap_log->console("Tracking Area Update Request -- eNB UE S1AP Id %d\n", enb_ue_s1ap_id);
handle_nas_tracking_area_update_request(ntohl(*m_tmsi), enb_ue_s1ap_id, nas_msg, reply_buffer,reply_flag, enb_sri);
return true;
}
else
{
m_s1ap_log->info("Unhandled Initial UE Message 0x%x\n",msg_type);
break;
default:
m_s1ap_log->info("Unhandled Initial UE Message 0x%x \n", msg_type);
m_s1ap_log->console("Unhandled Initial UE Message 0x%x \n", msg_type);
err = false;
}
m_pool->deallocate(nas_msg);
return true;
return err;
}
bool
@ -751,13 +734,17 @@ s1ap_nas_transport::handle_nas_guti_attach_request( uint32_t enb_ue_s1ap_id,
}
bool
s1ap_nas_transport::handle_nas_service_request(uint32_t m_tmsi,
uint32_t enb_ue_s1ap_id,
s1ap_nas_transport::handle_nas_service_request( uint32_t m_tmsi,
uint32_t enb_ue_s1ap_id,
srslte::byte_buffer_t *nas_msg,
srslte::byte_buffer_t *reply_buffer,
bool* reply_flag,
struct sctp_sndrcvinfo *enb_sri)
{
m_s1ap_log->info("Service request -- S-TMSI 0x%x\n", m_tmsi);
m_s1ap_log->console("Service request -- S-TMSI 0x%x\n", m_tmsi);
m_s1ap_log->info("Service request -- eNB UE S1AP Id %d\n", enb_ue_s1ap_id);
m_s1ap_log->console("Service request -- eNB UE S1AP Id %d\n", enb_ue_s1ap_id);
bool mac_valid = false;
LIBLTE_MME_SERVICE_REQUEST_MSG_STRUCT service_req;
@ -853,6 +840,11 @@ s1ap_nas_transport::handle_nas_detach_request(uint32_t m_tmsi,
bool* reply_flag,
struct sctp_sndrcvinfo *enb_sri)
{
m_s1ap_log->info("Detach Request -- S-TMSI 0x%x\n", m_tmsi);
m_s1ap_log->console("Detach Request -- S-TMSI 0x%x\n", m_tmsi);
m_s1ap_log->info("Detach Request -- eNB UE S1AP Id %d\n", enb_ue_s1ap_id);
m_s1ap_log->console("Detach Request -- eNB UE S1AP Id %d\n", enb_ue_s1ap_id);
bool mac_valid = false;
LIBLTE_MME_DETACH_REQUEST_MSG_STRUCT detach_req;
@ -895,6 +887,11 @@ s1ap_nas_transport::handle_nas_tracking_area_update_request(uint32_t m_tmsi,
bool* reply_flag,
struct sctp_sndrcvinfo *enb_sri)
{
m_s1ap_log->info("Tracking Area Update Request -- S-TMSI 0x%x\n", m_tmsi);
m_s1ap_log->console("Tracking Area Update Request -- S-TMSI 0x%x\n", m_tmsi);
m_s1ap_log->info("Tracking Area Update Request -- eNB UE S1AP Id %d\n", enb_ue_s1ap_id);
m_s1ap_log->console("Tracking Area Update Request -- eNB UE S1AP Id %d\n", enb_ue_s1ap_id);
m_s1ap_log->console("Warning: Tracking area update requests are not handled yet.\n");
m_s1ap_log->warning("Tracking area update requests are not handled yet.\n");

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