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srsLTE
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Handling UE Context release to cleanup UE context.

This commit is contained in:
Pedro Alvarez 2017-11-10 18:18:32 +00:00
parent 1f52d1741c
commit 150a747181
2 changed files with 44 additions and 6 deletions
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2
srsepc/hdr/mme/s1ap.h
View File

@ -72,6 +72,8 @@ public:
bool handle_initial_ue_message(LIBLTE_S1AP_MESSAGE_INITIALUEMESSAGE_STRUCT *init_ue, struct sctp_sndrcvinfo *enb_sri);
bool handle_uplink_nas_transport(LIBLTE_S1AP_MESSAGE_UPLINKNASTRANSPORT_STRUCT *ul_xport, struct sctp_sndrcvinfo *enb_sri);
bool handle_ue_context_release_request(LIBLTE_S1AP_MESSAGE_UECONTEXTRELEASEREQUEST_STRUCT *ue_rel, struct sctp_sndrcvinfo *enb_sri);
bool handle_nas_authentication_response(srslte::byte_buffer_t *nas_buffer, srslte::byte_buffer_t *reply_buffer, ue_ctx_t *ue_ctx);
bool handle_nas_security_mode_complete(srslte::byte_buffer_t *nas_msg, srslte::byte_buffer_t *reply_msg, ue_ctx_t *ue_ctx);

48
srsepc/src/mme/s1ap.cc
View File

@ -225,6 +225,9 @@ s1ap::handle_initiating_message(LIBLTE_S1AP_INITIATINGMESSAGE_STRUCT *msg, stru
case LIBLTE_S1AP_INITIATINGMESSAGE_CHOICE_UPLINKNASTRANSPORT:
m_s1ap_log->info("Received Uplink NAS Transport Message.\n");
return handle_uplink_nas_transport(&msg->choice.UplinkNASTransport, enb_sri);
case LIBLTE_S1AP_INITIATINGMESSAGE_CHOICE_UECONTEXTRELEASEREQUEST:
m_s1ap_log->info("Received UE Context Release Request Message.\n");
return handle_ue_context_release_request(&msg->choice.UEContextReleaseRequest, enb_sri);
default:
m_s1ap_log->error("Unhandled intiating message: %s\n", liblte_s1ap_initiatingmessage_choice_text[msg->choice_type]);
}
@ -482,12 +485,6 @@ s1ap::handle_nas_authentication_response(srslte::byte_buffer_t *nas_msg, srslte:
bool
s1ap::handle_nas_security_mode_complete(srslte::byte_buffer_t *nas_msg, srslte::byte_buffer_t *reply_msg, ue_ctx_t *ue_ctx)
{
/*
typedef struct{
LIBLTE_MME_MOBILE_ID_STRUCT imeisv;
bool imeisv_present;
}LIBLTE_MME_SECURITY_MODE_COMPLETE_MSG_STRUCT;
*/
LIBLTE_MME_SECURITY_MODE_COMPLETE_MSG_STRUCT sm_comp;
//Get NAS authentication response
@ -511,6 +508,45 @@ s1ap::handle_nas_security_mode_complete(srslte::byte_buffer_t *nas_msg, srslte::
return true;
}
bool
s1ap::handle_ue_context_release_request(LIBLTE_S1AP_MESSAGE_UECONTEXTRELEASEREQUEST_STRUCT *ue_rel, struct sctp_sndrcvinfo *enb_sri)
{
uint32_t mme_ue_s1ap_id = ue_rel->MME_UE_S1AP_ID.MME_UE_S1AP_ID;
m_s1ap_log->info("Received UE Context Release Request. MME-UE S1AP Id: %d\n", mme_ue_s1ap_id);
m_s1ap_log->console("Received UE Context Release Request. MME-UE S1AP Id %d\n", mme_ue_s1ap_id);
std::map<uint32_t, ue_ctx_t*>::iterator ue_ctx = m_active_ues.find(mme_ue_s1ap_id);
if(ue_ctx == m_active_ues.end() )
{
m_s1ap_log->info("UE not found. MME-UE S1AP Id: %d\n", mme_ue_s1ap_id);
return false;
}
//Delete UE within eNB UE set
std::map<int32_t,uint16_t>::iterator it = m_sctp_to_enb_id.find(enb_sri->sinfo_assoc_id);
if(it == m_sctp_to_enb_id.end() )
{
m_s1ap_log->error("Could not find eNB for this request.\n");
return false;
}
uint16_t enb_id = it->second;
std::map<uint16_t,std::set<uint32_t> >::iterator ue_set = m_enb_id_to_ue_ids.find(enb_id);
if(ue_set == m_enb_id_to_ue_ids.end())
{
m_s1ap_log->error("Could not find the eNB's UEs.\n");
return false;
}
ue_set->second.erase(mme_ue_s1ap_id);
//Delete UE context
delete ue_ctx->second;
m_active_ues.erase(ue_ctx);
m_s1ap_log->info("Deleted UE Context.\n");
return true;
}
void
s1ap::print_enb_ctx_info(const enb_ctx_t &enb_ctx)
{