/* * Copyright (C) 2019,2020 by Sukchan Lee * * This file is part of Open5GS. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ #include "gsm-build.h" #undef OGS_LOG_DOMAIN #define OGS_LOG_DOMAIN __gsm_log_domain ogs_pkbuf_t *gsm_build_pdu_session_establishment_accept(smf_sess_t *sess) { ogs_pkbuf_t *pkbuf = NULL; smf_bearer_t *bearer = NULL; ogs_nas_5gs_message_t message; ogs_nas_5gs_pdu_session_establishment_accept_t * pdu_session_establishment_accept = &message.gsm.pdu_session_establishment_accept; ogs_nas_pdu_session_type_t *selected_pdu_session_type = NULL; ogs_nas_qos_rules_t *authorized_qos_rules = NULL; ogs_nas_session_ambr_t *session_ambr = NULL; ogs_nas_5gsm_cause_t *gsm_cause = NULL; ogs_nas_pdu_address_t *pdu_address = NULL; ogs_nas_s_nssai_t *nas_s_nssai = NULL; ogs_nas_qos_flow_descriptions_t *authorized_qos_flow_descriptions = NULL; ogs_nas_extended_protocol_configuration_options_t *extended_protocol_configuration_options = NULL; ogs_nas_dnn_t *dnn = NULL; ogs_nas_qos_rule_t qos_rule[OGS_NAS_MAX_NUM_OF_QOS_RULE]; ogs_nas_qos_flow_description_t qos_flow_description; uint8_t pco_buf[OGS_MAX_PCO_LEN]; int16_t pco_len; selected_pdu_session_type = &pdu_session_establishment_accept-> selected_pdu_session_type; ogs_assert(selected_pdu_session_type); authorized_qos_rules = &pdu_session_establishment_accept-> authorized_qos_rules; ogs_assert(authorized_qos_rules); session_ambr = &pdu_session_establishment_accept->session_ambr; ogs_assert(session_ambr); pdu_address = &pdu_session_establishment_accept->pdu_address; ogs_assert(pdu_address); gsm_cause = &pdu_session_establishment_accept->gsm_cause; ogs_assert(gsm_cause); nas_s_nssai = &pdu_session_establishment_accept->s_nssai; ogs_assert(nas_s_nssai); authorized_qos_flow_descriptions = &pdu_session_establishment_accept->authorized_qos_flow_descriptions; ogs_assert(authorized_qos_flow_descriptions); extended_protocol_configuration_options = &pdu_session_establishment_accept-> extended_protocol_configuration_options; ogs_assert(extended_protocol_configuration_options); dnn = &pdu_session_establishment_accept->dnn; ogs_assert(dnn); ogs_assert(sess); bearer = smf_default_bearer_in_sess(sess); ogs_assert(bearer); memset(&message, 0, sizeof(message)); message.gsm.h.extended_protocol_discriminator = OGS_NAS_EXTENDED_PROTOCOL_DISCRIMINATOR_5GSM; message.gsm.h.pdu_session_identity = sess->psi; message.gsm.h.procedure_transaction_identity = sess->pti; message.gsm.h.message_type = OGS_NAS_5GS_PDU_SESSION_ESTABLISHMENT_ACCEPT; selected_pdu_session_type->type = sess->pdn.ssc_mode; selected_pdu_session_type->value = sess->pdn.pdn_type; /* * TS23.501 * 5.7.1.3 QoS Rules * * A default QoS rule is required to be sent to the UE for every PDU * Session establishment and it is associated with a QoS Flow. For IP type * PDU Session or Ethernet type PDU Session, the default QoS rule is * the only QoS rule of a PDU Session which may contain a Packet Filter * Set that allows all UL packets, and in this case, the highest * precedence value shall be used for the QoS rule. * * As long as the default QoS rule does not contain a Packet Filter Set or * contains a Packet Filter Set that allows all UL packets, Reflective QoS * should not be applied for the QoS Flow which the default QoS rule is * associated with and the RQA should not be sent for this QoS Flow. */ memset(qos_rule, 0, sizeof(qos_rule)); qos_rule[0].identifier = 1; qos_rule[0].length = 6; qos_rule[0].code = OGS_NAS_QOS_CODE_CREATE_NEW_QOS_RULE; qos_rule[0].DQR_bit = 1; qos_rule[0].num_of_packet_filter = 1; qos_rule[0].pf[0].direction = OGS_NAS_QOS_DIRECTION_UPLINK; qos_rule[0].pf[0].pf_identifier = 1; qos_rule[0].pf[0].length = 1; qos_rule[0].pf[0].num_of_component = 1; qos_rule[0].pf[0].component[0].type = OGS_PACKET_FILTER_MATCH_ALL; /* * TS23.501 * 5.7.1.9 Precedence Value * * The QoS rule precedence value and the PDR precedence value determine * the order in which a QoS rule or a PDR, respectively, shall be evaluated. * The evaluation of the QoS rules or PDRs is performed in increasing order * of their precedence value. */ qos_rule[0].precedence = 255; /* lowest precedence */ qos_rule[0].flow.segregation = 0; qos_rule[0].flow.identifier = bearer->qfi; ogs_nas_build_qos_rules(authorized_qos_rules, qos_rule, 1); /* Session-AMBR */ session_ambr->length = 6; ogs_nas_bitrate_from_uint64( &session_ambr->downlink, sess->pdn.ambr.downlink); ogs_nas_bitrate_from_uint64( &session_ambr->uplink, sess->pdn.ambr.uplink); /* PDU Address */ pdu_session_establishment_accept->presencemask |= OGS_NAS_5GS_PDU_SESSION_ESTABLISHMENT_ACCEPT_PDU_ADDRESS_PRESENT; pdu_address->pdn_type = sess->pdn.paa.pdn_type; if (pdu_address->pdn_type == OGS_PDU_SESSION_TYPE_IPV4) { pdu_address->addr = sess->pdn.paa.addr; pdu_address->length = OGS_NAS_PDU_ADDRESS_IPV4_LEN; } else if (pdu_address->pdn_type == OGS_PDU_SESSION_TYPE_IPV6) { memcpy(pdu_address->addr6, sess->pdn.paa.addr6+(OGS_IPV6_LEN>>1), OGS_IPV6_LEN>>1); pdu_address->length = OGS_NAS_PDU_ADDRESS_IPV6_LEN; } else if (pdu_address->pdn_type == OGS_PDU_SESSION_TYPE_IPV4V6) { pdu_address->both.addr = sess->pdn.paa.both.addr; memcpy(pdu_address->both.addr6, sess->pdn.paa.both.addr6+(OGS_IPV6_LEN>>1), OGS_IPV6_LEN>>1); pdu_address->length = OGS_NAS_PDU_ADDRESS_IPV4V6_LEN; } else { ogs_error("Unexpected PDN Type %u", pdu_address->pdn_type); return NULL; } /* GSM cause */ if (sess->ue_pdu_session_type == OGS_PDU_SESSION_TYPE_IPV4V6) { if (pdu_address->pdn_type == OGS_PDU_SESSION_TYPE_IPV4) { pdu_session_establishment_accept->presencemask |= OGS_NAS_5GS_PDU_SESSION_ESTABLISHMENT_ACCEPT_5GSM_CAUSE_PRESENT; *gsm_cause = OGS_5GSM_CAUSE_PDU_SESSION_TYPE_IPV4_ONLY_ALLOWED; } else if (pdu_address->pdn_type == OGS_PDU_SESSION_TYPE_IPV6) { pdu_session_establishment_accept->presencemask |= OGS_NAS_5GS_PDU_SESSION_ESTABLISHMENT_ACCEPT_5GSM_CAUSE_PRESENT; *gsm_cause = OGS_5GSM_CAUSE_PDU_SESSION_TYPE_IPV6_ONLY_ALLOWED; } } /* S-NSSAI */ pdu_session_establishment_accept->presencemask |= OGS_NAS_5GS_PDU_SESSION_ESTABLISHMENT_ACCEPT_S_NSSAI_PRESENT; ogs_nas_build_s_nssai(nas_s_nssai, &sess->s_nssai); /* QoS flow descriptions */ memset(&qos_flow_description, 0, sizeof(qos_flow_description)); qos_flow_description.identifier = bearer->qfi; qos_flow_description.code = OGS_NAS_CREATE_NEW_QOS_FLOW_DESCRIPTION; qos_flow_description.E = 1; qos_flow_description.num_of_parameter = 1; qos_flow_description.param[0].identifier = OGS_NAX_QOS_FLOW_PARAMETER_ID_5QI; qos_flow_description.param[0].len = 1; qos_flow_description.param[0].content[0] = sess->pdn.qos.qci; pdu_session_establishment_accept->presencemask |= OGS_NAS_5GS_PDU_SESSION_ESTABLISHMENT_ACCEPT_AUTHORIZED_QOS_FLOW_DESCRIPTIONS_PRESENT; authorized_qos_flow_descriptions->length = 6; authorized_qos_flow_descriptions->buffer = &qos_flow_description; /* Extended protocol configuration options */ if (sess->nas.ue_pco.buffer && sess->nas.ue_pco.length) { pco_len = smf_pco_build(pco_buf, sess->nas.ue_pco.buffer, sess->nas.ue_pco.length); ogs_assert(pco_len > 0); pdu_session_establishment_accept->presencemask |= OGS_NAS_5GS_PDU_SESSION_ESTABLISHMENT_ACCEPT_EXTENDED_PROTOCOL_CONFIGURATION_OPTIONS_PRESENT; extended_protocol_configuration_options->buffer = pco_buf; extended_protocol_configuration_options->length = pco_len; } /* DNN */ pdu_session_establishment_accept->presencemask |= OGS_NAS_5GS_PDU_SESSION_ESTABLISHMENT_ACCEPT_DNN_PRESENT; dnn->length = strlen(sess->pdn.dnn); ogs_cpystrn(dnn->value, sess->pdn.dnn, ogs_min(dnn->length, OGS_MAX_DNN_LEN) + 1); pkbuf = ogs_nas_5gs_plain_encode(&message); ogs_assert(pkbuf); ogs_free(authorized_qos_rules->buffer); return pkbuf; } ogs_pkbuf_t *gsm_build_pdu_session_establishment_reject( smf_sess_t *sess, ogs_nas_5gsm_cause_t gsm_cause) { ogs_nas_5gs_message_t message; ogs_nas_5gs_pdu_session_establishment_reject_t * pdu_session_establishment_reject = &message.gsm.pdu_session_establishment_reject; memset(&message, 0, sizeof(message)); message.gsm.h.extended_protocol_discriminator = OGS_NAS_EXTENDED_PROTOCOL_DISCRIMINATOR_5GSM; message.gsm.h.pdu_session_identity = sess->psi; message.gsm.h.procedure_transaction_identity = sess->pti; message.gsm.h.message_type = OGS_NAS_5GS_PDU_SESSION_ESTABLISHMENT_REJECT; pdu_session_establishment_reject->gsm_cause = gsm_cause; return ogs_nas_5gs_plain_encode(&message); } ogs_pkbuf_t *gsm_build_pdu_session_release_command( smf_sess_t *sess, ogs_nas_5gsm_cause_t gsm_cause) { ogs_nas_5gs_message_t message; ogs_nas_5gs_pdu_session_release_command_t *pdu_session_release_command = &message.gsm.pdu_session_release_command; memset(&message, 0, sizeof(message)); message.gsm.h.extended_protocol_discriminator = OGS_NAS_EXTENDED_PROTOCOL_DISCRIMINATOR_5GSM; message.gsm.h.pdu_session_identity = sess->psi; message.gsm.h.procedure_transaction_identity = sess->pti; message.gsm.h.message_type = OGS_NAS_5GS_PDU_SESSION_RELEASE_COMMAND; pdu_session_release_command->gsm_cause = gsm_cause; return ogs_nas_5gs_plain_encode(&message); } ogs_pkbuf_t *gsm_build_pdu_session_release_reject( smf_sess_t *sess, ogs_nas_5gsm_cause_t gsm_cause) { ogs_nas_5gs_message_t message; ogs_nas_5gs_pdu_session_release_reject_t * pdu_session_release_reject = &message.gsm.pdu_session_release_reject; memset(&message, 0, sizeof(message)); message.gsm.h.extended_protocol_discriminator = OGS_NAS_EXTENDED_PROTOCOL_DISCRIMINATOR_5GSM; message.gsm.h.pdu_session_identity = sess->psi; message.gsm.h.procedure_transaction_identity = sess->pti; message.gsm.h.message_type = OGS_NAS_5GS_PDU_SESSION_RELEASE_REJECT; pdu_session_release_reject->gsm_cause = gsm_cause; return ogs_nas_5gs_plain_encode(&message); }