2017-03-27 10:32:24 +00:00
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#define TRACE_MODULE _emm_sm
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2017-03-05 07:49:57 +00:00
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#include "core_debug.h"
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2017-03-26 05:57:33 +00:00
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#include "nas_message.h"
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2017-08-10 07:47:18 +00:00
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#include "fd_lib.h"
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2017-08-25 15:11:46 +00:00
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#include "s6a_message.h"
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2017-03-26 06:34:34 +00:00
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2017-04-04 01:49:19 +00:00
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#include "mme_event.h"
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2017-08-01 22:17:12 +00:00
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#include "mme_kdf.h"
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2017-08-07 22:58:13 +00:00
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#include "s1ap_handler.h"
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2017-08-25 11:31:08 +00:00
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#include "mme_fd_path.h"
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2017-08-10 07:47:18 +00:00
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#include "emm_handler.h"
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#include "emm_build.h"
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#include "esm_handler.h"
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2017-08-10 08:02:07 +00:00
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#include "mme_s11_handler.h"
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2017-03-06 00:00:37 +00:00
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2017-04-11 00:32:34 +00:00
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void emm_state_initial(fsm_t *s, event_t *e)
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2017-03-05 07:49:57 +00:00
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{
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d_assert(s, return, "Null param");
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2017-08-02 10:33:57 +00:00
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mme_sm_trace(3, e);
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2017-03-05 07:49:57 +00:00
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2017-03-27 10:32:24 +00:00
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FSM_TRAN(s, &emm_state_operational);
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2017-03-05 07:49:57 +00:00
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}
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2017-04-11 00:32:34 +00:00
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void emm_state_final(fsm_t *s, event_t *e)
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2017-03-05 07:49:57 +00:00
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{
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d_assert(s, return, "Null param");
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2017-08-02 10:33:57 +00:00
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mme_sm_trace(3, e);
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2017-03-05 07:49:57 +00:00
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}
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2017-04-11 00:32:34 +00:00
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void emm_state_operational(fsm_t *s, event_t *e)
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2017-03-05 07:49:57 +00:00
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{
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d_assert(s, return, "Null param");
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d_assert(e, return, "Null param");
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2017-08-02 10:33:57 +00:00
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mme_sm_trace(3, e);
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2017-03-05 07:49:57 +00:00
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switch (event_get(e))
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{
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case FSM_ENTRY_SIG:
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{
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break;
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}
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case FSM_EXIT_SIG:
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{
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break;
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}
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2017-08-25 15:25:55 +00:00
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case MME_EVT_EMM_MESSAGE:
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2017-03-05 07:49:57 +00:00
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{
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2017-04-11 00:19:33 +00:00
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index_t index = event_get_param1(e);
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2017-04-28 07:11:45 +00:00
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mme_ue_t *mme_ue = NULL;
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2017-04-10 14:59:59 +00:00
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nas_message_t *message = NULL;
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2017-04-11 00:19:33 +00:00
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d_assert(index, return, "Null param");
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2017-04-28 07:11:45 +00:00
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mme_ue = mme_ue_find(index);
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d_assert(mme_ue, return, "Null param");
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2017-04-10 14:59:59 +00:00
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2017-07-28 14:20:09 +00:00
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message = (nas_message_t *)event_get_param4(e);
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2017-04-09 05:57:07 +00:00
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d_assert(message, break, "Null param");
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2017-03-05 08:36:16 +00:00
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2017-07-25 15:22:20 +00:00
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if (message->emm.h.security_header_type
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== NAS_SECURITY_HEADER_FOR_SERVICE_REQUEST_MESSAGE)
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{
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2017-08-10 07:47:18 +00:00
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/* Update Kenb */
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if (SECURITY_CONTEXT_IS_VALID(mme_ue))
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mme_kdf_enb(mme_ue->kasme, mme_ue->ul_count.i32,
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mme_ue->kenb);
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2017-08-11 01:17:44 +00:00
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mme_ue_paged(mme_ue);
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emm_handle_service_request(
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mme_ue, &message->emm.service_request);
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2017-07-25 15:22:20 +00:00
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break;
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}
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2017-04-09 05:57:07 +00:00
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switch(message->emm.h.message_type)
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2017-03-05 09:09:34 +00:00
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{
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case NAS_ATTACH_REQUEST:
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{
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2017-08-10 07:47:18 +00:00
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/* Update Kenb */
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if (SECURITY_CONTEXT_IS_VALID(mme_ue))
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mme_kdf_enb(mme_ue->kasme, mme_ue->ul_count.i32,
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mme_ue->kenb);
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2017-08-11 01:17:44 +00:00
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2017-08-27 07:30:10 +00:00
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CLEAR_EPS_BEARER_ID(mme_ue);
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2017-08-11 01:17:44 +00:00
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mme_ue_paged(mme_ue);
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emm_handle_attach_request(
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mme_ue, &message->emm.attach_request);
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2017-09-03 02:48:41 +00:00
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if (!MME_UE_HAVE_IMSI(mme_ue))
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{
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/* Unknown GUTI */
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emm_handle_identity_request(mme_ue);
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break;
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}
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if (SECURITY_CONTEXT_IS_VALID(mme_ue))
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{
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event_emm_to_esm(
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mme_ue, &mme_ue->last_pdn_connectivity_request);
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}
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else
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{
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if (MME_UE_HAVE_SESSION(mme_ue))
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{
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mme_s11_handle_delete_all_sessions_request_in_ue(
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mme_ue);
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}
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else
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{
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mme_s6a_send_air(mme_ue);
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}
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}
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2017-03-05 09:09:34 +00:00
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break;
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}
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2017-04-19 05:01:39 +00:00
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case NAS_IDENTITY_RESPONSE:
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{
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2017-04-28 07:11:45 +00:00
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emm_handle_identity_response(mme_ue,
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2017-04-19 05:01:39 +00:00
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&message->emm.identity_response);
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2017-08-10 07:47:18 +00:00
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2017-09-03 03:38:00 +00:00
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d_assert(MME_UE_HAVE_IMSI(mme_ue), break,
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"No IMSI in IDENTITY_RESPONSE");
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2017-08-10 07:47:18 +00:00
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if (SECURITY_CONTEXT_IS_VALID(mme_ue))
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{
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2017-09-03 02:48:41 +00:00
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event_emm_to_esm(mme_ue,
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&mme_ue->last_pdn_connectivity_request);
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2017-08-10 08:02:07 +00:00
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}
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else
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{
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2017-08-11 03:05:01 +00:00
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if (MME_UE_HAVE_SESSION(mme_ue))
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2017-08-10 08:02:07 +00:00
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{
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2017-08-27 07:30:10 +00:00
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mme_s11_handle_delete_all_sessions_request_in_ue(
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mme_ue);
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2017-08-10 08:02:07 +00:00
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}
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else
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{
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mme_s6a_send_air(mme_ue);
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}
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2017-08-10 07:47:18 +00:00
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}
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2017-04-19 05:01:39 +00:00
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break;
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}
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2017-03-06 12:45:41 +00:00
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case NAS_AUTHENTICATION_RESPONSE:
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{
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2017-03-26 05:57:33 +00:00
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emm_handle_authentication_response(
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2017-04-28 07:11:45 +00:00
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mme_ue, &message->emm.authentication_response);
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2017-03-07 05:47:17 +00:00
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break;
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}
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case NAS_SECURITY_MODE_COMPLETE:
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{
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2017-08-02 06:11:08 +00:00
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d_trace(3, "[NAS] Security mode complete : "
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"UE[%s] --> EMM\n", mme_ue->imsi_bcd);
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2017-08-01 22:17:12 +00:00
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/* Update Kenb */
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if (SECURITY_CONTEXT_IS_VALID(mme_ue))
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mme_kdf_enb(mme_ue->kasme, mme_ue->ul_count.i32,
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mme_ue->kenb);
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2017-04-28 07:11:45 +00:00
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mme_s6a_send_ulr(mme_ue);
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2017-03-06 12:45:41 +00:00
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break;
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}
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2017-04-13 14:14:59 +00:00
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case NAS_ATTACH_COMPLETE:
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{
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2017-08-02 06:11:08 +00:00
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d_trace(3, "[NAS] Attach complete : UE[%s] --> EMM\n",
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2017-04-28 07:11:45 +00:00
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mme_ue->imsi_bcd);
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2017-04-13 14:30:56 +00:00
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emm_handle_attach_complete(
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2017-04-28 07:11:45 +00:00
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mme_ue, &message->emm.attach_complete);
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2017-04-13 14:14:59 +00:00
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break;
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}
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2017-04-14 11:20:00 +00:00
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case NAS_EMM_STATUS:
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{
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2017-04-28 07:11:45 +00:00
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emm_handle_emm_status(mme_ue, &message->emm.emm_status);
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2017-04-14 11:20:00 +00:00
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break;
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}
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2017-04-26 08:57:50 +00:00
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case NAS_DETACH_REQUEST:
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{
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emm_handle_detach_request(
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2017-04-28 07:11:45 +00:00
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mme_ue, &message->emm.detach_request_from_ue);
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2017-08-27 07:30:10 +00:00
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if (MME_UE_HAVE_SESSION(mme_ue))
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{
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mme_s11_handle_delete_all_sessions_request_in_ue(
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mme_ue);
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}
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else
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{
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emm_handle_detach_accept(mme_ue);
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}
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2017-04-26 08:57:50 +00:00
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break;
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}
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2017-08-07 22:58:13 +00:00
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case NAS_TRACKING_AREA_UPDATE_REQUEST:
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{
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mme_ue_paged(mme_ue);
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2017-08-23 23:53:44 +00:00
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emm_handle_tau_request(
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mme_ue, &message->emm.tracking_area_update_request);
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2017-08-07 22:58:13 +00:00
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break;
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}
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2017-03-05 09:09:34 +00:00
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default:
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{
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2017-04-09 05:57:07 +00:00
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d_warn("Not implemented(type:%d)",
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message->emm.h.message_type);
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2017-03-05 09:09:34 +00:00
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break;
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}
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}
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2017-03-05 07:49:57 +00:00
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break;
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}
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2017-08-25 15:25:55 +00:00
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case MME_EVT_EMM_T3413:
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2017-08-07 22:58:13 +00:00
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{
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index_t index = event_get_param1(e);
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mme_ue_t *mme_ue = NULL;
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d_assert(index, return, "Null param");
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mme_ue = mme_ue_find(index);
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d_assert(mme_ue, return, "Null param");
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if (mme_ue->max_paging_retry >= MAX_NUM_OF_PAGING)
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{
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/* Paging failed */
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d_warn("Paging to UE(%s) failed. Stop paging",
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mme_ue->imsi_bcd);
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if (mme_ue->last_paging_msg)
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{
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pkbuf_free(mme_ue->last_paging_msg);
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mme_ue->last_paging_msg = NULL;
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}
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break;
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}
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mme_ue->max_paging_retry++;
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s1ap_handle_paging(mme_ue);
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/* Start T3413 */
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tm_start(mme_ue->t3413);
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break;
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}
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2017-03-05 07:49:57 +00:00
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default:
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{
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2017-03-24 09:47:05 +00:00
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d_error("Unknown event %s", mme_event_get_name(e));
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2017-03-05 07:49:57 +00:00
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break;
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}
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}
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}
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2017-04-11 00:32:34 +00:00
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void emm_state_exception(fsm_t *s, event_t *e)
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2017-03-05 07:49:57 +00:00
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{
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d_assert(s, return, "Null param");
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d_assert(e, return, "Null param");
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2017-08-02 10:33:57 +00:00
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mme_sm_trace(3, e);
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2017-03-05 07:49:57 +00:00
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switch (event_get(e))
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{
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case FSM_ENTRY_SIG:
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{
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break;
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}
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case FSM_EXIT_SIG:
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{
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break;
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}
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default:
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{
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2017-03-24 09:47:05 +00:00
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d_error("Unknown event %s", mme_event_get_name(e));
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2017-03-05 07:49:57 +00:00
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break;
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}
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}
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}
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