forked from acouzens/open5gs
150 lines
5.1 KiB
C
150 lines
5.1 KiB
C
#define TRACE_MODULE _mme_s11_build
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#include "core_debug.h"
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#include "gtp_types.h"
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#include "gtp_tlv.h"
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#include "3gpp_common.h"
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#include "mme_context.h"
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status_t mme_s11_build_create_session_request(pkbuf_t **pkbuf, mme_esm_t *esm)
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{
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status_t rv;
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pdn_t *pdn = NULL;
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mme_sgw_t *sgw = NULL;
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mme_ue_t *ue = NULL;
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gtp_message_t gtp_message;
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gtp_create_session_request_t *req = >p_message.create_session_request;
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gtp_uli_t uli;
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char uli_buf[GTP_MAX_ULI_LEN];
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gtp_f_teid_t s11, s5;
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gtp_ambr_t ambr;
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gtp_bearer_qos_t bearer_qos;
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char bearer_qos_buf[GTP_BEARER_QOS_LEN];
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gtp_ue_timezone_t ue_timezone;
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d_assert(esm, return CORE_ERROR, "Null param");
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pdn = esm->pdn;
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d_assert(pdn, return CORE_ERROR, "Null param");
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sgw = esm->sgw;
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d_assert(sgw, return CORE_ERROR, "Null param");
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ue = esm->ue;
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d_assert(ue, return CORE_ERROR, "Null param");
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d_assert(esm->ue_pco_len, return CORE_ERROR, "Null param");
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memset(>p_message, 0, sizeof(gtp_message_t));
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d_assert(ue->imsi_len, return CORE_ERROR, "Null param");
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req->imsi.presence = 1;
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req->imsi.data = ue->imsi;
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req->imsi.len = ue->imsi_len;
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/* Not used */
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req->msisdn.presence = 1;
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req->msisdn.data = ue->imsi;
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req->msisdn.len = ue->imsi_len;
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/* Not used */
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req->me_identity.presence = 1;
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req->me_identity.data = ue->imsi;
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req->me_identity.len = ue->imsi_len;
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memset(&uli, 0, sizeof(gtp_uli_t));
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uli.flags.e_cgi = 1;
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uli.flags.tai = 1;
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memcpy(&uli.tai.plmn_id, &ue->tai.plmn_id, sizeof(uli.tai.plmn_id));
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uli.tai.tac = ue->tai.tac;
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memcpy(&uli.e_cgi.plmn_id, &ue->e_cgi.plmn_id, sizeof(uli.tai.plmn_id));
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uli.e_cgi.cell_id = ue->e_cgi.cell_id;
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req->user_location_information.presence = 1;
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gtp_build_uli(&req->user_location_information, &uli,
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uli_buf, GTP_MAX_ULI_LEN);
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req->serving_network.presence = 1;
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req->serving_network.data = &ue->visited_plmn_id;
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req->serving_network.len = sizeof(ue->visited_plmn_id);
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req->rat_type.presence = 1;
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req->rat_type.u8 = GTP_RAT_TYPE_EUTRAN;
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memset(&s11, 0, sizeof(gtp_f_teid_t));
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s11.ipv4 = 1;
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s11.interface_type = GTP_F_TEID_S11_MME_GTP_C;
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s11.teid = htonl(esm->teid);
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s11.ipv4_addr = mme_self()->s11_addr;
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req->sender_f_teid_for_control_plane.presence = 1;
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req->sender_f_teid_for_control_plane.data = &s11;
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req->sender_f_teid_for_control_plane.len = GTP_F_TEID_IPV4_LEN;
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memset(&s5, 0, sizeof(gtp_f_teid_t));
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s5.ipv4 = 1;
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s5.interface_type = GTP_F_TEID_S5_S8_PGW_GTP_C;
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req->pgw_s5_s8_address_for_control_plane_or_pmip.presence = 1;
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req->pgw_s5_s8_address_for_control_plane_or_pmip.data = &s5;
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req->pgw_s5_s8_address_for_control_plane_or_pmip.len = GTP_F_TEID_IPV4_LEN;
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req->access_point_name.presence = 1;
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req->access_point_name.data = pdn->apn;
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req->access_point_name.len = strlen(pdn->apn);
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req->selection_mode.presence = 1;
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req->selection_mode.u8 =
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GTP_SELECTION_MODE_MS_OR_NETWORK_PROVIDED_APN | 0xfc;
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req->pdn_type.presence = 1;
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req->pdn_type.u8 = GTP_PDN_TYPE_IPV4;
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pdn->paa.gtp_type = GTP_PDN_TYPE_IPV4;
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req->pdn_address_allocation.presence = 1;
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req->pdn_address_allocation.data = &pdn->paa;
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req->pdn_address_allocation.len = PAA_IPV4_LEN;
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req->maximum_apn_restriction.presence = 1;
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req->maximum_apn_restriction.u8 = GTP_APN_NO_RESTRICTION;
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memset(&ambr, 0, sizeof(gtp_ambr_t));
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ambr.uplink = htonl(pdn->max_bandwidth_ul);
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ambr.downlink = htonl(pdn->max_bandwidth_dl);
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req->aggregate_maximum_bit_rate.presence = 1;
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req->aggregate_maximum_bit_rate.data = &ambr;
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req->aggregate_maximum_bit_rate.len = sizeof(ambr);
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req->protocol_configuration_options.presence = 1;
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req->protocol_configuration_options.data = esm->ue_pco;
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req->protocol_configuration_options.len = esm->ue_pco_len;
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req->bearer_contexts_to_be_created.presence = 1;
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req->bearer_contexts_to_be_created.eps_bearer_id.presence = 1;
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req->bearer_contexts_to_be_created.eps_bearer_id.u8 = esm->ebi;
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memset(&bearer_qos, 0, sizeof(bearer_qos));
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bearer_qos.pre_emption_vulnerability = pdn->pre_emption_vulnerability;
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bearer_qos.pre_emption_capability = pdn->pre_emption_capability;
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bearer_qos.qci = pdn->qci;
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bearer_qos.priority_level = pdn->priority_level;
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req->bearer_contexts_to_be_created.bearer_level_qos.presence = 1;
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gtp_build_bearer_qos(&req->bearer_contexts_to_be_created.bearer_level_qos,
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&bearer_qos, bearer_qos_buf, GTP_BEARER_QOS_LEN);
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memset(&ue_timezone, 0, sizeof(ue_timezone));
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ue_timezone.timezone = 0x40;
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ue_timezone.daylight_saving_time =
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GTP_UE_TIME_ZONE_NO_ADJUSTMENT_FOR_DAYLIGHT_SAVING_TIME;
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req->ue_time_zone.presence = 1;
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req->ue_time_zone.data = &ue_timezone;
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req->ue_time_zone.len = sizeof(ue_timezone);
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req->charging_characteristics.presence = 1;
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req->charging_characteristics.data = (c_uint8_t *)"\x54\x00";
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req->charging_characteristics.len = 2;
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rv = gtp_build_msg(pkbuf, GTP_CREATE_SESSION_REQUEST_TYPE, >p_message);
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d_assert(rv == CORE_OK, return CORE_ERROR, "gtp build failed");
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return CORE_OK;
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}
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