open5gs/src/mme/s1ap_handler.c

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2017-03-26 05:57:33 +00:00
#define TRACE_MODULE _s1ap_handler
#include "core_debug.h"
#include "context.h"
#include "s1ap_conv.h"
#include "s1ap_build.h"
#include "s1ap_handler.h"
#include "s1ap_path.h"
void s1ap_handle_s1_setup_request(enb_ctx_t *enb, s1ap_message_t *message)
{
char buf[INET_ADDRSTRLEN];
S1ap_S1SetupRequestIEs_t *ies = NULL;
pkbuf_t *sendbuf = NULL;
c_uint32_t enb_id;
d_assert(enb, return, "Null param");
d_assert(enb->s1ap_sock, return, "Null param");
d_assert(message, return, "Null param");
ies = &message->s1ap_S1SetupRequestIEs;
d_assert(ies, return, "Null param");
s1ap_ENB_ID_to_uint32(&ies->global_ENB_ID.eNB_ID, &enb_id);
#if 0 /* FIXME : does it needed? */
if (mme_ctx_enb_find_by_enb_id(enb_id))
{
S1ap_Cause_t cause;
d_error("eNB-id[0x%x] duplicated from [%s]", enb_id,
INET_NTOP(&enb->s1ap_sock->remote.sin_addr.s_addr, buf));
cause.present = S1ap_Cause_PR_protocol;
cause.choice.protocol =
S1ap_CauseProtocol_message_not_compatible_with_receiver_state;
rv = s1ap_build_setup_failure(&sendbuf, cause);
}
#endif
d_assert(enb->s1ap_sock, return,);
d_info("[S1AP] S1SetupRequest : eNB[%s:%d] --> MME",
INET_NTOP(&enb->s1ap_sock->remote.sin_addr.s_addr, buf),
enb_id);
enb->enb_id = enb_id;
d_assert(s1ap_build_setup_rsp(&sendbuf) == CORE_OK,
return, "build error");
d_assert(s1ap_send_to_enb(enb, sendbuf) == CORE_OK, , "send error");
d_assert(enb->s1ap_sock, return,);
d_info("[S1AP] S1SetupResponse: eNB[%s:%d] <-- MME",
INET_NTOP(&enb->s1ap_sock->remote.sin_addr.s_addr, buf),
enb_id);
}
void s1ap_handle_initial_ue_message(enb_ctx_t *enb, s1ap_message_t *message)
{
char buf[INET_ADDRSTRLEN];
ue_ctx_t *ue = NULL;
S1ap_InitialUEMessage_IEs_t *ies = NULL;
d_assert(enb, return, "Null param");
ies = &message->s1ap_InitialUEMessage_IEs;
d_assert(ies, return, "Null param");
ue = mme_ctx_ue_find_by_enb_ue_s1ap_id(enb, ies->eNB_UE_S1AP_ID);
if (!ue)
{
ue = mme_ctx_ue_add(enb);
d_assert(ue, return, "Null param");
ue->enb_ue_s1ap_id = ies->eNB_UE_S1AP_ID;
}
else
{
d_warn("Duplicated: eNB[0x%x] sends "
"Initial-UE Message[eNB-UE-S1AP-ID(%d)]",
enb->enb_id, ue->enb_ue_s1ap_id);
}
d_assert(enb->s1ap_sock, mme_ctx_ue_remove(ue);return,);
d_info("[S1AP] InitialUEMessage : UE[eNB-UE-S1AP-ID(%d)] --> eNB[%s:%d]",
ue->enb_ue_s1ap_id,
INET_NTOP(&enb->s1ap_sock->remote.sin_addr.s_addr, buf),
enb->enb_id);
fsm_create((fsm_t*)&ue->emm_sm,
ue_emm_state_initial, ue_emm_state_final);
ue->emm_sm.ctx = ue;
fsm_init((fsm_t*)&ue->emm_sm, 0);
s1ap_send_nas_to_emm(ue, &ies->nas_pdu);
}
void s1ap_handle_uplink_nas_transport(
enb_ctx_t *enb, s1ap_message_t *message)
{
char buf[INET_ADDRSTRLEN];
ue_ctx_t *ue = NULL;
S1ap_UplinkNASTransport_IEs_t *ies = NULL;
ies = &message->s1ap_UplinkNASTransport_IEs;
d_assert(ies, return, "Null param");
ue = mme_ctx_ue_find_by_enb_ue_s1ap_id(enb, ies->eNB_UE_S1AP_ID);
d_assert(ue, return, "Null param");
d_info("[S1AP] uplinkNASTransport : UE[eNB-UE-S1AP-ID(%d)] --> eNB[%s:%d]",
ue->enb_ue_s1ap_id,
INET_NTOP(&enb->s1ap_sock->remote.sin_addr.s_addr, buf),
enb->enb_id);
s1ap_send_nas_to_emm(ue, &ies->nas_pdu);
}