forked from acouzens/open5gs
153 lines
4.2 KiB
C
153 lines
4.2 KiB
C
#include "nas/nas-message.h"
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#include "mme-context.h"
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#include "nas-path.h"
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#include "mme-gtp-path.h"
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#include "esm-build.h"
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#undef OGS_LOG_DOMAIN
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#define OGS_LOG_DOMAIN __esm_log_domain
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int esm_handle_pdn_connectivity_request(mme_bearer_t *bearer,
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nas_pdn_connectivity_request_t *pdn_connectivity_request)
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{
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int rv;
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mme_ue_t *mme_ue = NULL;
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mme_sess_t *sess = NULL;
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uint8_t security_protected_required = 0;
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ogs_assert(bearer);
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sess = bearer->sess;
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ogs_assert(sess);
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mme_ue = sess->mme_ue;
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ogs_assert(mme_ue);
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ogs_assert(pdn_connectivity_request);
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ogs_assert(MME_UE_HAVE_IMSI(mme_ue));
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ogs_assert(SECURITY_CONTEXT_IS_VALID(mme_ue));
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memcpy(&sess->request_type, &pdn_connectivity_request->request_type,
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sizeof(sess->request_type));
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security_protected_required = 0;
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if (pdn_connectivity_request->presencemask &
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NAS_PDN_CONNECTIVITY_REQUEST_ESM_INFORMATION_TRANSFER_FLAG_PRESENT)
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{
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nas_esm_information_transfer_flag_t *esm_information_transfer_flag =
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&pdn_connectivity_request->esm_information_transfer_flag;
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security_protected_required =
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esm_information_transfer_flag->security_protected_required;
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ogs_debug(" EIT(ESM information transfer)[%d]",
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security_protected_required);
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}
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if (pdn_connectivity_request->presencemask &
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NAS_PDN_CONNECTIVITY_REQUEST_ACCESS_POINT_NAME_PRESENT)
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{
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sess->pdn = mme_pdn_find_by_apn(mme_ue,
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pdn_connectivity_request->access_point_name.apn);
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if (!sess->pdn)
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{
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/* Invalid APN */
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rv = nas_send_pdn_connectivity_reject(
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sess, ESM_CAUSE_MISSING_OR_UNKNOWN_APN);
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ogs_assert(rv == OGS_OK);
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return OGS_ERROR;
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}
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}
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if (pdn_connectivity_request->presencemask &
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NAS_PDN_CONNECTIVITY_REQUEST_PROTOCOL_CONFIGURATION_OPTIONS_PRESENT)
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{
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nas_protocol_configuration_options_t *protocol_configuration_options =
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&pdn_connectivity_request->protocol_configuration_options;
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NAS_STORE_DATA(&sess->ue_pco, protocol_configuration_options);
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}
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if (security_protected_required)
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{
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rv = nas_send_esm_information_request(bearer);
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ogs_assert(rv == OGS_OK);
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return OGS_OK;
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}
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if (!sess->pdn)
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{
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/* Default APN */
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sess->pdn = mme_default_pdn(mme_ue);
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}
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if (sess->pdn)
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{
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ogs_debug(" APN[%s]", sess->pdn->apn);
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rv = mme_gtp_send_create_session_request(sess);
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ogs_assert(rv == OGS_OK);
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}
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else
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{
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rv = nas_send_pdn_connectivity_reject(
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sess, ESM_CAUSE_MISSING_OR_UNKNOWN_APN);
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ogs_assert(rv == OGS_OK);
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return OGS_ERROR;
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}
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return OGS_OK;
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}
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int esm_handle_information_response(mme_sess_t *sess,
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nas_esm_information_response_t *esm_information_response)
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{
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int rv;
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mme_ue_t *mme_ue = NULL;
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ogs_assert(sess);
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mme_ue = sess->mme_ue;
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ogs_assert(mme_ue);
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if (esm_information_response->presencemask &
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NAS_ESM_INFORMATION_RESPONSE_ACCESS_POINT_NAME_PRESENT)
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{
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sess->pdn = mme_pdn_find_by_apn(mme_ue,
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esm_information_response->access_point_name.apn);
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}
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if (esm_information_response->presencemask &
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NAS_ESM_INFORMATION_RESPONSE_PROTOCOL_CONFIGURATION_OPTIONS_PRESENT)
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{
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nas_protocol_configuration_options_t *protocol_configuration_options =
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&esm_information_response->protocol_configuration_options;
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NAS_STORE_DATA(&sess->ue_pco, protocol_configuration_options);
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}
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if (sess->pdn)
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{
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ogs_debug(" APN[%s]", sess->pdn->apn);
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if (SESSION_CONTEXT_IS_AVAILABLE(mme_ue))
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{
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rv = nas_send_attach_accept(mme_ue);
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ogs_assert(rv == OGS_OK);
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}
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else
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{
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rv = mme_gtp_send_create_session_request(sess);
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ogs_assert(rv == OGS_OK);
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}
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}
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else
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{
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rv = nas_send_pdn_connectivity_reject(
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sess, ESM_CAUSE_MISSING_OR_UNKNOWN_APN);
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ogs_assert(rv == OGS_OK);
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return OGS_ERROR;
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}
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return OGS_OK;
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}
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