forked from acouzens/open5gs
497 lines
13 KiB
C
497 lines
13 KiB
C
#define TRACE_MODULE _emm_sm
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#include "core_debug.h"
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#include "nas_message.h"
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#include "fd_lib.h"
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#include "s6a_message.h"
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#include "mme_event.h"
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#include "mme_kdf.h"
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#include "s1ap_handler.h"
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#include "mme_fd_path.h"
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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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#include "nas_path.h"
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#include "s1ap_path.h"
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#include "mme_gtp_path.h"
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void emm_state_initial(fsm_t *s, event_t *e)
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{
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d_assert(s, return, "Null param");
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mme_sm_trace(3, e);
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FSM_TRAN(s, &emm_state_detached);
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}
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void emm_state_final(fsm_t *s, event_t *e)
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{
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d_assert(s, return, "Null param");
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mme_sm_trace(3, e);
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}
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void emm_state_detached(fsm_t *s, event_t *e)
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{
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mme_ue_t *mme_ue = NULL;
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d_assert(s, return, "Null param");
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d_assert(e, return, "Null param");
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mme_sm_trace(3, e);
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mme_ue = mme_ue_find(event_get_param1(e));
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d_assert(mme_ue, return, "Null param");
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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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case MME_EVT_EMM_MESSAGE:
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{
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nas_message_t *message = (nas_message_t *)event_get_param4(e);
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d_assert(message, break, "Null param");
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switch(message->emm.h.message_type)
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{
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case NAS_ATTACH_REQUEST:
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{
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emm_handle_attach_request(
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mme_ue, &message->emm.attach_request);
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break;
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}
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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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d_error("Unknown event %s", mme_event_get_name(e));
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break;
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}
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}
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}
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void emm_state_identity(fsm_t *s, event_t *e)
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{
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status_t rv;
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mme_ue_t *mme_ue = NULL;
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d_assert(s, return, "Null param");
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d_assert(e, return, "Null param");
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mme_sm_trace(3, e);
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mme_ue = mme_ue_find(event_get_param1(e));
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d_assert(mme_ue, return, "Null param");
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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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pkbuf_t *emmbuf = NULL;
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rv = emm_build_identity_request(&emmbuf, mme_ue);
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d_assert(rv == CORE_OK && emmbuf, break, "emm build error");
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rv = nas_send_to_downlink_nas_transport(mme_ue, emmbuf);
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d_assert(rv == CORE_OK && emmbuf, break, "emm send error");
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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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case MME_EVT_EMM_MESSAGE:
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{
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nas_message_t *message = (nas_message_t *)event_get_param4(e);
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d_assert(message, break, "Null param");
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switch(message->emm.h.message_type)
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{
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case NAS_IDENTITY_RESPONSE:
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{
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emm_handle_identity_response(mme_ue,
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&message->emm.identity_response);
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break;
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}
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case NAS_EMM_STATUS:
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{
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emm_handle_emm_status(mme_ue, &message->emm.emm_status);
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FSM_TRAN(s, &emm_state_detached);
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break;
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}
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default:
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{
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d_warn("Unknown message(type:%d)",
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message->emm.h.message_type);
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break;
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}
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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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d_error("Unknown event %s", mme_event_get_name(e));
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break;
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}
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}
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}
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void emm_state_authentication(fsm_t *s, event_t *e)
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{
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mme_ue_t *mme_ue = NULL;
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d_assert(s, return, "Null param");
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d_assert(e, return, "Null param");
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mme_sm_trace(3, e);
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mme_ue = mme_ue_find(event_get_param1(e));
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d_assert(mme_ue, return, "Null param");
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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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case MME_EVT_EMM_MESSAGE:
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{
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nas_message_t *message = (nas_message_t *)event_get_param4(e);
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d_assert(message, break, "Null param");
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switch(message->emm.h.message_type)
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{
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case NAS_AUTHENTICATION_RESPONSE:
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{
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emm_handle_authentication_response(
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mme_ue, &message->emm.authentication_response);
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FSM_TRAN(s, &emm_state_security_mode);
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break;
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}
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case NAS_EMM_STATUS:
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{
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emm_handle_emm_status(mme_ue, &message->emm.emm_status);
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FSM_TRAN(s, &emm_state_detached);
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break;
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}
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default:
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{
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d_warn("Unknown message(type:%d)",
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message->emm.h.message_type);
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break;
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}
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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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d_error("Unknown event %s", mme_event_get_name(e));
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break;
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}
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}
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}
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void emm_state_security_mode(fsm_t *s, event_t *e)
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{
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mme_ue_t *mme_ue = NULL;
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d_assert(s, return, "Null param");
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d_assert(e, return, "Null param");
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mme_sm_trace(3, e);
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mme_ue = mme_ue_find(event_get_param1(e));
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d_assert(mme_ue, return, "Null param");
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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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status_t rv;
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pkbuf_t *emmbuf = NULL;
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rv = emm_build_security_mode_command(&emmbuf, mme_ue);
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d_assert(rv == CORE_OK && emmbuf, break, "emm build error");
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rv = nas_send_to_downlink_nas_transport(mme_ue, emmbuf);
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d_assert(rv == CORE_OK && emmbuf, break, "emm send error");
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d_trace(3, "[NAS] Security mode command : UE[%s] <-- EMM\n",
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mme_ue->imsi_bcd);
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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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case MME_EVT_EMM_MESSAGE:
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{
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nas_message_t *message = (nas_message_t *)event_get_param4(e);
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d_assert(message, break, "Null param");
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switch(message->emm.h.message_type)
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{
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case NAS_SECURITY_MODE_COMPLETE:
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{
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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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/* 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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mme_s6a_send_ulr(mme_ue);
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FSM_TRAN(s, &emm_state_default_esm);
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break;
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}
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case NAS_EMM_STATUS:
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{
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emm_handle_emm_status(mme_ue, &message->emm.emm_status);
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FSM_TRAN(s, &emm_state_detached);
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break;
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}
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default:
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{
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d_warn("Unknown message(type:%d)",
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message->emm.h.message_type);
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break;
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}
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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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d_error("Unknown event %s", mme_event_get_name(e));
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break;
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}
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}
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}
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void emm_state_default_esm(fsm_t *s, event_t *e)
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{
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mme_ue_t *mme_ue = NULL;
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d_assert(s, return, "Null param");
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d_assert(e, return, "Null param");
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mme_sm_trace(3, e);
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mme_ue = mme_ue_find(event_get_param1(e));
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d_assert(mme_ue, return, "Null param");
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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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case MME_EVT_EMM_MESSAGE:
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{
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nas_message_t *message = (nas_message_t *)event_get_param4(e);
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d_assert(message, break, "Null param");
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switch(message->emm.h.message_type)
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{
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case NAS_ATTACH_COMPLETE:
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{
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d_trace(3, "[NAS] Attach complete : UE[%s] --> EMM\n",
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mme_ue->imsi_bcd);
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emm_handle_attach_complete(
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mme_ue, &message->emm.attach_complete);
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FSM_TRAN(s, &emm_state_attached);
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break;
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}
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case NAS_EMM_STATUS:
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{
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emm_handle_emm_status(mme_ue, &message->emm.emm_status);
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FSM_TRAN(s, &emm_state_detached);
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break;
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}
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default:
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{
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d_warn("Unknown message(type:%d)",
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message->emm.h.message_type);
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break;
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}
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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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d_error("Unknown event %s", mme_event_get_name(e));
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break;
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}
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}
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}
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void emm_state_attached(fsm_t *s, event_t *e)
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{
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mme_ue_t *mme_ue = NULL;
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d_assert(s, return, "Null param");
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d_assert(e, return, "Null param");
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mme_sm_trace(3, e);
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mme_ue = mme_ue_find(event_get_param1(e));
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d_assert(mme_ue, return, "Null param");
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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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case MME_EVT_EMM_MESSAGE:
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{
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nas_message_t *message = (nas_message_t *)event_get_param4(e);
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d_assert(message, break, "Null param");
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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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emm_handle_service_request(
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mme_ue, &message->emm.service_request);
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break;
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}
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switch(message->emm.h.message_type)
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{
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case NAS_ATTACH_REQUEST:
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{
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emm_handle_attach_request(
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mme_ue, &message->emm.attach_request);
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break;
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}
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case NAS_EMM_STATUS:
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{
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emm_handle_emm_status(mme_ue, &message->emm.emm_status);
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FSM_TRAN(s, &emm_state_detached);
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break;
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}
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case NAS_DETACH_REQUEST:
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{
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emm_handle_detach_request(
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mme_ue, &message->emm.detach_request_from_ue);
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FSM_TRAN(s, &emm_state_detached);
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break;
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}
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case NAS_TRACKING_AREA_UPDATE_REQUEST:
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{
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emm_handle_tau_request(
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mme_ue, &message->emm.tracking_area_update_request);
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break;
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}
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case NAS_TRACKING_AREA_UPDATE_COMPLETE:
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{
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status_t rv;
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S1ap_Cause_t cause;
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enb_ue_t *enb_ue = mme_ue->enb_ue;
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d_assert(enb_ue, return, "Null param");
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cause.present = S1ap_Cause_PR_nas;
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cause.choice.nas = S1ap_CauseNas_normal_release;
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rv = s1ap_send_ue_context_release_commmand(enb_ue, &cause);
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d_assert(rv == CORE_OK, return, "s1ap send error");
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break;
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}
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default:
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{
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d_warn("Unknown message(type:%d)",
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message->emm.h.message_type);
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break;
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}
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}
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break;
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}
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case MME_EVT_EMM_T3413:
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{
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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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default:
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{
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d_error("Unknown event %s", mme_event_get_name(e));
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break;
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}
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}
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}
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void emm_state_exception(fsm_t *s, event_t *e)
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{
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mme_ue_t *mme_ue = NULL;
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mme_sess_t *sess = NULL;
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mme_bearer_t *bearer = NULL;
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d_assert(s, return, "Null param");
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d_assert(e, return, "Null param");
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mme_sm_trace(3, e);
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bearer = mme_bearer_find(event_get_param1(e));
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d_assert(bearer, return, "Null param");
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sess = bearer->sess;
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d_assert(sess, return, "Null param");
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mme_ue = sess->mme_ue;
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d_assert(mme_ue, return, "Null param");
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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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d_error("Unknown event %s", mme_event_get_name(e));
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break;
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}
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}
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}
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