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open5gs/src/mme/mme-s11-build.c

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/*
* Copyright (C) 2019 by Sukchan Lee <acetcom@gmail.com>
*
* 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 <https://www.gnu.org/licenses/>.
*/
#include "mme-context.h"
#include "mme-s11-build.h"
ogs_pkbuf_t *mme_s11_build_create_session_request(
uint8_t type, mme_sess_t *sess)
{
int rv;
ogs_session_t *session = NULL;
mme_ue_t *mme_ue = NULL;
mme_bearer_t *bearer = NULL;
ogs_gtp_message_t gtp_message;
ogs_gtp_create_session_request_t *req = &gtp_message.create_session_request;
ogs_gtp_uli_t uli;
char uli_buf[OGS_GTP_MAX_ULI_LEN];
ogs_gtp_f_teid_t mme_s11_teid, pgw_s5c_teid;
int len;
ogs_gtp_ambr_t ambr;
ogs_gtp_bearer_qos_t bearer_qos;
char bearer_qos_buf[GTP_BEARER_QOS_LEN];
ogs_gtp_ue_timezone_t ue_timezone;
struct timeval now;
struct tm time_exp;
char apn[OGS_MAX_APN_LEN];
ogs_gtp_indication_t indication;
ogs_assert(sess);
session = sess->session;
ogs_assert(session);
ogs_assert(session->name);
bearer = mme_default_bearer_in_sess(sess);
ogs_assert(bearer);
mme_ue = sess->mme_ue;
ogs_assert(mme_ue);
ogs_debug("Create Session Request");
ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
mme_ue->mme_s11_teid, mme_ue->sgw_s11_teid);
memset(&gtp_message, 0, sizeof(ogs_gtp_message_t));
ogs_assert(mme_ue->imsi_len);
req->imsi.presence = 1;
req->imsi.data = mme_ue->imsi;
req->imsi.len = mme_ue->imsi_len;
if (mme_ue->imeisv_len) {
req->me_identity.presence = 1;
req->me_identity.data = mme_ue->imeisv;
req->me_identity.len = mme_ue->imeisv_len;
}
if (mme_ue->msisdn_len) {
req->msisdn.presence = 1;
req->msisdn.data = mme_ue->msisdn;
req->msisdn.len = mme_ue->msisdn_len;
}
memset(&uli, 0, sizeof(ogs_gtp_uli_t));
uli.flags.e_cgi = 1;
uli.flags.tai = 1;
ogs_nas_from_plmn_id(&uli.tai.nas_plmn_id, &mme_ue->tai.plmn_id);
uli.tai.tac = mme_ue->tai.tac;
ogs_nas_from_plmn_id(&uli.e_cgi.nas_plmn_id, &mme_ue->e_cgi.plmn_id);
uli.e_cgi.cell_id = mme_ue->e_cgi.cell_id;
req->user_location_information.presence = 1;
ogs_gtp_build_uli(&req->user_location_information, &uli,
uli_buf, OGS_GTP_MAX_ULI_LEN);
req->serving_network.presence = 1;
req->serving_network.data = &uli.tai.nas_plmn_id;
req->serving_network.len = sizeof(uli.tai.nas_plmn_id);
req->rat_type.presence = 1;
req->rat_type.u8 = OGS_GTP_RAT_TYPE_EUTRAN;
memset(&mme_s11_teid, 0, sizeof(ogs_gtp_f_teid_t));
mme_s11_teid.interface_type = OGS_GTP_F_TEID_S11_MME_GTP_C;
mme_s11_teid.teid = htobe32(mme_ue->mme_s11_teid);
rv = ogs_gtp_sockaddr_to_f_teid(
ogs_gtp_self()->gtpc_addr, ogs_gtp_self()->gtpc_addr6,
&mme_s11_teid, &len);
ogs_assert(rv == OGS_OK);
req->sender_f_teid_for_control_plane.presence = 1;
req->sender_f_teid_for_control_plane.data = &mme_s11_teid;
req->sender_f_teid_for_control_plane.len = len;
memset(&pgw_s5c_teid, 0, sizeof(ogs_gtp_f_teid_t));
pgw_s5c_teid.interface_type = OGS_GTP_F_TEID_S5_S8_PGW_GTP_C;
if (session->smf_ip.ipv4 || session->smf_ip.ipv6) {
pgw_s5c_teid.ipv4 = session->smf_ip.ipv4;
pgw_s5c_teid.ipv6 = session->smf_ip.ipv6;
if (pgw_s5c_teid.ipv4 && pgw_s5c_teid.ipv6) {
pgw_s5c_teid.both.addr = session->smf_ip.addr;
memcpy(pgw_s5c_teid.both.addr6, session->smf_ip.addr6,
sizeof session->smf_ip.addr6);
req->pgw_s5_s8_address_for_control_plane_or_pmip.len =
OGS_GTP_F_TEID_IPV4V6_LEN;
} else if (pgw_s5c_teid.ipv4) {
pgw_s5c_teid.addr = session->smf_ip.addr;
req->pgw_s5_s8_address_for_control_plane_or_pmip.len =
OGS_GTP_F_TEID_IPV4_LEN;
} else if (pgw_s5c_teid.ipv6) {
memcpy(pgw_s5c_teid.addr6, session->smf_ip.addr6,
sizeof session->smf_ip.addr6);
req->pgw_s5_s8_address_for_control_plane_or_pmip.len =
OGS_GTP_F_TEID_IPV6_LEN;
}
req->pgw_s5_s8_address_for_control_plane_or_pmip.presence = 1;
req->pgw_s5_s8_address_for_control_plane_or_pmip.data =
&pgw_s5c_teid;
} else {
ogs_sockaddr_t *pgw_addr = NULL;
ogs_sockaddr_t *pgw_addr6 = NULL;
pgw_addr = mme_pgw_addr_find_by_apn(
&mme_self()->pgw_list, AF_INET, session->name);
pgw_addr6 = mme_pgw_addr_find_by_apn(
&mme_self()->pgw_list, AF_INET6, session->name);
if (!pgw_addr && !pgw_addr6) {
pgw_addr = mme_self()->pgw_addr;
pgw_addr6 = mme_self()->pgw_addr6;
}
rv = ogs_gtp_sockaddr_to_f_teid(
pgw_addr, pgw_addr6, &pgw_s5c_teid, &len);
ogs_assert(rv == OGS_OK);
req->pgw_s5_s8_address_for_control_plane_or_pmip.presence = 1;
req->pgw_s5_s8_address_for_control_plane_or_pmip.data = &pgw_s5c_teid;
req->pgw_s5_s8_address_for_control_plane_or_pmip.len = len;
}
req->access_point_name.presence = 1;
req->access_point_name.len = ogs_fqdn_build(
apn, session->name, strlen(session->name));
req->access_point_name.data = apn;
req->selection_mode.presence = 1;
req->selection_mode.u8 =
OGS_GTP_SELECTION_MODE_MS_OR_NETWORK_PROVIDED_APN;
ogs_assert(sess->request_type.type == OGS_NAS_EPS_PDN_TYPE_IPV4 ||
sess->request_type.type == OGS_NAS_EPS_PDN_TYPE_IPV6 ||
sess->request_type.type == OGS_NAS_EPS_PDN_TYPE_IPV4V6);
if (session->session_type == OGS_PDU_SESSION_TYPE_IPV4 ||
session->session_type == OGS_PDU_SESSION_TYPE_IPV6 ||
session->session_type == OGS_PDU_SESSION_TYPE_IPV4V6) {
req->pdn_type.u8 = (session->session_type & sess->request_type.type);
if (req->pdn_type.u8 == 0) {
ogs_fatal("Cannot derive PDN Type [UE:%d,HSS:%d]",
sess->request_type.type, session->session_type);
ogs_assert_if_reached();
}
} else {
ogs_fatal("Invalid PDN_TYPE[%d]", session->session_type);
ogs_assert_if_reached();
}
req->pdn_type.presence = 1;
/* If we started with both addrs (IPV4V6) but the above code
* (pdn_type & sess->request_type) truncates us down to just one,
* we need to change position of addresses in struct. */
if (req->pdn_type.u8 == OGS_PDU_SESSION_TYPE_IPV4 &&
session->session_type == OGS_PDU_SESSION_TYPE_IPV4V6) {
uint32_t addr = session->paa.both.addr;
session->paa.addr = addr;
}
if (req->pdn_type.u8 == OGS_PDU_SESSION_TYPE_IPV6 &&
session->session_type == OGS_PDU_SESSION_TYPE_IPV4V6) {
uint8_t addr[16];
memcpy(&addr, session->paa.both.addr6, OGS_IPV6_LEN);
memcpy(session->paa.addr6, &addr, OGS_IPV6_LEN);
}
memset(&indication, 0, sizeof(ogs_gtp_indication_t));
if (req->pdn_type.u8 == OGS_PDU_SESSION_TYPE_IPV4V6) {
indication.daf = 1;
}
if (sess->request_type.value == OGS_NAS_EPS_REQUEST_TYPE_HANDOVER) {
indication.hi = 1;
}
if (indication.daf || indication.hi) {
req->indication_flags.presence = 1;
req->indication_flags.data = &indication;
req->indication_flags.len = sizeof(ogs_gtp_indication_t);
}
session->paa.session_type = req->pdn_type.u8;
req->pdn_address_allocation.data = &session->paa;
if (req->pdn_type.u8 == OGS_PDU_SESSION_TYPE_IPV4)
req->pdn_address_allocation.len = OGS_PAA_IPV4_LEN;
else if (req->pdn_type.u8 == OGS_PDU_SESSION_TYPE_IPV6)
req->pdn_address_allocation.len = OGS_PAA_IPV6_LEN;
else if (req->pdn_type.u8 == OGS_PDU_SESSION_TYPE_IPV4V6)
req->pdn_address_allocation.len = OGS_PAA_IPV4V6_LEN;
else
ogs_assert_if_reached();
req->pdn_address_allocation.presence = 1;
req->maximum_apn_restriction.presence = 1;
req->maximum_apn_restriction.u8 = OGS_GTP_APN_NO_RESTRICTION;
if (session->ambr.uplink || session->ambr.downlink) {
/*
* Ch 8.7. Aggregate Maximum Bit Rate(AMBR) in TS 29.274 V15.9.0
*
* AMBR is defined in clause 9.9.4.2 of 3GPP TS 24.301 [23],
* but it shall be encoded as shown in Figure 8.7-1 as
* Unsigned32 binary integer values in kbps (1000 bits per second).
*/
memset(&ambr, 0, sizeof(ogs_gtp_ambr_t));
ambr.uplink = htobe32(session->ambr.uplink / 1000);
ambr.downlink = htobe32(session->ambr.downlink / 1000);
req->aggregate_maximum_bit_rate.presence = 1;
req->aggregate_maximum_bit_rate.data = &ambr;
req->aggregate_maximum_bit_rate.len = sizeof(ambr);
}
if (sess->ue_pco.length && sess->ue_pco.buffer) {
req->protocol_configuration_options.presence = 1;
req->protocol_configuration_options.data = sess->ue_pco.buffer;
req->protocol_configuration_options.len = sess->ue_pco.length;
}
req->bearer_contexts_to_be_created.presence = 1;
req->bearer_contexts_to_be_created.eps_bearer_id.presence = 1;
req->bearer_contexts_to_be_created.eps_bearer_id.u8 = bearer->ebi;
memset(&bearer_qos, 0, sizeof(bearer_qos));
bearer_qos.qci = session->qos.index;
bearer_qos.priority_level = session->qos.arp.priority_level;
bearer_qos.pre_emption_capability = session->qos.arp.pre_emption_capability;
bearer_qos.pre_emption_vulnerability =
session->qos.arp.pre_emption_vulnerability;
req->bearer_contexts_to_be_created.bearer_level_qos.presence = 1;
ogs_gtp_build_bearer_qos(
&req->bearer_contexts_to_be_created.bearer_level_qos,
&bearer_qos, bearer_qos_buf, GTP_BEARER_QOS_LEN);
/* UE Time Zone */
memset(&ue_timezone, 0, sizeof(ue_timezone));
ogs_gettimeofday(&now);
ogs_localtime(now.tv_sec, &time_exp);
if (time_exp.tm_gmtoff >= 0) {
ue_timezone.timezone = OGS_GTP_TIME_TO_BCD(time_exp.tm_gmtoff / 900);
} else {
ue_timezone.timezone = OGS_GTP_TIME_TO_BCD((-time_exp.tm_gmtoff) / 900);
ue_timezone.timezone |= 0x08;
}
/* quarters of an hour */
ue_timezone.daylight_saving_time =
OGS_GTP_UE_TIME_ZONE_NO_ADJUSTMENT_FOR_DAYLIGHT_SAVING_TIME;
req->ue_time_zone.presence = 1;
req->ue_time_zone.data = &ue_timezone;
req->ue_time_zone.len = sizeof(ue_timezone);
req->charging_characteristics.presence = 1;
req->charging_characteristics.data = (uint8_t *)"\x54\x00";
req->charging_characteristics.len = 2;
gtp_message.h.type = type;
return ogs_gtp_build_msg(&gtp_message);
}
ogs_pkbuf_t *mme_s11_build_modify_bearer_request(
uint8_t type, mme_bearer_t *bearer, int uli_presence)
{
int rv;
ogs_gtp_message_t gtp_message;
ogs_gtp_modify_bearer_request_t *req = &gtp_message.modify_bearer_request;
ogs_gtp_f_teid_t enb_s1u_teid;
int len;
ogs_gtp_uli_t uli;
char uli_buf[OGS_GTP_MAX_ULI_LEN];
ogs_gtp_indication_t indication;
mme_ue_t *mme_ue = NULL;
mme_sess_t *sess = NULL;
ogs_assert(bearer);
sess = bearer->sess;
ogs_assert(sess);
mme_ue = sess->mme_ue;
ogs_assert(mme_ue);
ogs_debug("Modifty Bearer Request");
ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
mme_ue->mme_s11_teid, mme_ue->sgw_s11_teid);
ogs_debug(" ENB_S1U_TEID[%d] SGW_S1U_TEID[%d]",
bearer->enb_s1u_teid, bearer->sgw_s1u_teid);
memset(&gtp_message, 0, sizeof(ogs_gtp_message_t));
if (sess->request_type.value == OGS_NAS_EPS_REQUEST_TYPE_HANDOVER) {
memset(&indication, 0, sizeof(ogs_gtp_indication_t));
indication.hi = 1;
req->indication_flags.presence = 1;
req->indication_flags.data = &indication;
req->indication_flags.len = sizeof(ogs_gtp_indication_t);
}
/* Bearer Context : EBI */
req->bearer_contexts_to_be_modified.presence = 1;
req->bearer_contexts_to_be_modified.eps_bearer_id.presence = 1;
req->bearer_contexts_to_be_modified.eps_bearer_id.u8 = bearer->ebi;
/* Data Plane(DL) : ENB-S1U */
memset(&enb_s1u_teid, 0, sizeof(ogs_gtp_f_teid_t));
enb_s1u_teid.interface_type = OGS_GTP_F_TEID_S1_U_ENODEB_GTP_U;
enb_s1u_teid.teid = htobe32(bearer->enb_s1u_teid);
rv = ogs_gtp_ip_to_f_teid(&bearer->enb_s1u_ip, &enb_s1u_teid, &len);
ogs_expect_or_return_val(rv == OGS_OK, NULL);
req->bearer_contexts_to_be_modified.s1_u_enodeb_f_teid.presence = 1;
req->bearer_contexts_to_be_modified.s1_u_enodeb_f_teid.data = &enb_s1u_teid;
req->bearer_contexts_to_be_modified.s1_u_enodeb_f_teid.len = len;
if (uli_presence) {
/* User Location Information(ULI) */
memset(&uli, 0, sizeof(ogs_gtp_uli_t));
uli.flags.e_cgi = 1;
uli.flags.tai = 1;
ogs_nas_from_plmn_id(&uli.tai.nas_plmn_id, &mme_ue->tai.plmn_id);
uli.tai.tac = mme_ue->tai.tac;
ogs_nas_from_plmn_id(&uli.e_cgi.nas_plmn_id, &mme_ue->e_cgi.plmn_id);
uli.e_cgi.cell_id = mme_ue->e_cgi.cell_id;
req->user_location_information.presence = 1;
ogs_gtp_build_uli(&req->user_location_information, &uli,
uli_buf, OGS_GTP_MAX_ULI_LEN);
}
gtp_message.h.type = type;
return ogs_gtp_build_msg(&gtp_message);
}
ogs_pkbuf_t *mme_s11_build_delete_session_request(
uint8_t type, mme_sess_t *sess)
{
ogs_gtp_message_t gtp_message;
ogs_gtp_delete_session_request_t *req = &gtp_message.delete_session_request;
ogs_gtp_uli_t uli;
char uli_buf[OGS_GTP_MAX_ULI_LEN];
ogs_gtp_indication_t indication;
mme_bearer_t *bearer = NULL;
mme_ue_t *mme_ue = NULL;
ogs_assert(sess);
mme_ue = sess->mme_ue;
ogs_assert(mme_ue);
bearer = mme_default_bearer_in_sess(sess);
ogs_assert(bearer);
ogs_debug("Delete Session Request");
ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
mme_ue->mme_s11_teid, mme_ue->sgw_s11_teid);
memset(&gtp_message, 0, sizeof(ogs_gtp_message_t));
req->linked_eps_bearer_id.presence = 1;
req->linked_eps_bearer_id.u8 = bearer->ebi;
/* User Location Information(ULI) */
memset(&uli, 0, sizeof(ogs_gtp_uli_t));
uli.flags.e_cgi = 1;
uli.flags.tai = 1;
ogs_nas_from_plmn_id(&uli.tai.nas_plmn_id, &mme_ue->tai.plmn_id);
uli.tai.tac = mme_ue->tai.tac;
ogs_nas_from_plmn_id(&uli.e_cgi.nas_plmn_id, &mme_ue->e_cgi.plmn_id);
uli.e_cgi.cell_id = mme_ue->e_cgi.cell_id;
req->user_location_information.presence = 1;
ogs_gtp_build_uli(&req->user_location_information, &uli,
uli_buf, OGS_GTP_MAX_ULI_LEN);
memset(&indication, 0, sizeof(ogs_gtp_indication_t));
indication.oi = 1;
req->indication_flags.presence = 1;
req->indication_flags.data = &indication;
req->indication_flags.len = sizeof(ogs_gtp_indication_t);
gtp_message.h.type = type;
return ogs_gtp_build_msg(&gtp_message);
}
ogs_pkbuf_t *mme_s11_build_create_bearer_response(
uint8_t type, mme_bearer_t *bearer, uint8_t cause_value)
{
int rv;
ogs_gtp_message_t gtp_message;
ogs_gtp_create_bearer_response_t *rsp = &gtp_message.create_bearer_response;
ogs_gtp_cause_t cause;
ogs_gtp_f_teid_t enb_s1u_teid, sgw_s1u_teid;
int len;
ogs_gtp_uli_t uli;
char uli_buf[OGS_GTP_MAX_ULI_LEN];
ogs_gtp_ue_timezone_t ue_timezone;
struct timeval now;
struct tm time_exp;
mme_ue_t *mme_ue = NULL;
ogs_assert(bearer);
mme_ue = bearer->mme_ue;
ogs_assert(mme_ue);
ogs_debug("Create Bearer Response");
ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
mme_ue->mme_s11_teid, mme_ue->sgw_s11_teid);
memset(&gtp_message, 0, sizeof(ogs_gtp_message_t));
/* Set Cause */
memset(&cause, 0, sizeof(cause));
cause.value = cause_value;
rsp->cause.presence = 1;
rsp->cause.len = sizeof(cause);
rsp->cause.data = &cause;
if (cause_value == OGS_GTP_CAUSE_REQUEST_ACCEPTED) {
/* Bearer Context : EBI */
rsp->bearer_contexts.presence = 1;
rsp->bearer_contexts.eps_bearer_id.presence = 1;
rsp->bearer_contexts.eps_bearer_id.u8 = bearer->ebi;
/* Data Plane(DL) : ENB-S1U */
memset(&enb_s1u_teid, 0, sizeof(ogs_gtp_f_teid_t));
enb_s1u_teid.interface_type = OGS_GTP_F_TEID_S1_U_ENODEB_GTP_U;
enb_s1u_teid.teid = htobe32(bearer->enb_s1u_teid);
rv = ogs_gtp_ip_to_f_teid(&bearer->enb_s1u_ip, &enb_s1u_teid, &len);
ogs_expect_or_return_val(rv == OGS_OK, NULL);
rsp->bearer_contexts.s1_u_enodeb_f_teid.presence = 1;
rsp->bearer_contexts.s1_u_enodeb_f_teid.data = &enb_s1u_teid;
rsp->bearer_contexts.s1_u_enodeb_f_teid.len = len;
/* Data Plane(UL) : SGW-S1U */
memset(&sgw_s1u_teid, 0, sizeof(ogs_gtp_f_teid_t));
sgw_s1u_teid.interface_type = OGS_GTP_F_TEID_S1_U_SGW_GTP_U;
sgw_s1u_teid.teid = htobe32(bearer->sgw_s1u_teid);
rv = ogs_gtp_ip_to_f_teid(&bearer->sgw_s1u_ip, &sgw_s1u_teid, &len);
ogs_expect_or_return_val(rv == OGS_OK, NULL);
rsp->bearer_contexts.s4_u_sgsn_f_teid.presence = 1;
rsp->bearer_contexts.s4_u_sgsn_f_teid.data = &sgw_s1u_teid;
rsp->bearer_contexts.s4_u_sgsn_f_teid.len = OGS_GTP_F_TEID_IPV4_LEN;
/* Bearer Context : Cause */
rsp->bearer_contexts.cause.presence = 1;
rsp->bearer_contexts.cause.len = sizeof(cause);
rsp->bearer_contexts.cause.data = &cause;
}
/* User Location Information(ULI) */
memset(&uli, 0, sizeof(ogs_gtp_uli_t));
uli.flags.e_cgi = 1;
uli.flags.tai = 1;
ogs_nas_from_plmn_id(&uli.tai.nas_plmn_id, &mme_ue->tai.plmn_id);
uli.tai.tac = mme_ue->tai.tac;
ogs_nas_from_plmn_id(&uli.e_cgi.nas_plmn_id, &mme_ue->e_cgi.plmn_id);
uli.e_cgi.cell_id = mme_ue->e_cgi.cell_id;
rsp->user_location_information.presence = 1;
ogs_gtp_build_uli(&rsp->user_location_information, &uli,
uli_buf, OGS_GTP_MAX_ULI_LEN);
/* UE Time Zone */
memset(&ue_timezone, 0, sizeof(ue_timezone));
ogs_gettimeofday(&now);
ogs_localtime(now.tv_sec, &time_exp);
if (time_exp.tm_gmtoff >= 0) {
ue_timezone.timezone = OGS_GTP_TIME_TO_BCD(time_exp.tm_gmtoff / 900);
} else {
ue_timezone.timezone = OGS_GTP_TIME_TO_BCD((-time_exp.tm_gmtoff) / 900);
ue_timezone.timezone |= 0x08;
}
ue_timezone.daylight_saving_time =
OGS_GTP_UE_TIME_ZONE_NO_ADJUSTMENT_FOR_DAYLIGHT_SAVING_TIME;
rsp->ue_time_zone.presence = 1;
rsp->ue_time_zone.data = &ue_timezone;
rsp->ue_time_zone.len = sizeof(ue_timezone);
gtp_message.h.type = type;
return ogs_gtp_build_msg(&gtp_message);
}
ogs_pkbuf_t *mme_s11_build_update_bearer_response(
uint8_t type, mme_bearer_t *bearer, uint8_t cause_value)
{
ogs_gtp_message_t gtp_message;
ogs_gtp_update_bearer_response_t *rsp = &gtp_message.update_bearer_response;
ogs_gtp_cause_t cause;
ogs_gtp_uli_t uli;
char uli_buf[OGS_GTP_MAX_ULI_LEN];
ogs_gtp_ue_timezone_t ue_timezone;
struct timeval now;
struct tm time_exp;
mme_ue_t *mme_ue = NULL;
ogs_assert(bearer);
mme_ue = bearer->mme_ue;
ogs_assert(mme_ue);
ogs_debug("Update Bearer Response");
ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
mme_ue->mme_s11_teid, mme_ue->sgw_s11_teid);
memset(&gtp_message, 0, sizeof(ogs_gtp_message_t));
/* Set Cause */
memset(&cause, 0, sizeof(cause));
cause.value = cause_value;
rsp->cause.presence = 1;
rsp->cause.len = sizeof(cause);
rsp->cause.data = &cause;
if (cause_value == OGS_GTP_CAUSE_REQUEST_ACCEPTED) {
/* Bearer Context : EBI */
rsp->bearer_contexts.presence = 1;
rsp->bearer_contexts.eps_bearer_id.presence = 1;
rsp->bearer_contexts.eps_bearer_id.u8 = bearer->ebi;
/* Bearer Context : Cause */
rsp->bearer_contexts.cause.presence = 1;
rsp->bearer_contexts.cause.len = sizeof(cause);
rsp->bearer_contexts.cause.data = &cause;
}
/* User Location Information(ULI) */
memset(&uli, 0, sizeof(ogs_gtp_uli_t));
uli.flags.e_cgi = 1;
uli.flags.tai = 1;
ogs_nas_from_plmn_id(&uli.tai.nas_plmn_id, &mme_ue->tai.plmn_id);
uli.tai.tac = mme_ue->tai.tac;
ogs_nas_from_plmn_id(&uli.e_cgi.nas_plmn_id, &mme_ue->e_cgi.plmn_id);
uli.e_cgi.cell_id = mme_ue->e_cgi.cell_id;
rsp->user_location_information.presence = 1;
ogs_gtp_build_uli(&rsp->user_location_information, &uli,
uli_buf, OGS_GTP_MAX_ULI_LEN);
/* UE Time Zone */
memset(&ue_timezone, 0, sizeof(ue_timezone));
ogs_gettimeofday(&now);
ogs_localtime(now.tv_sec, &time_exp);
if (time_exp.tm_gmtoff >= 0) {
ue_timezone.timezone = OGS_GTP_TIME_TO_BCD(time_exp.tm_gmtoff / 900);
} else {
ue_timezone.timezone = OGS_GTP_TIME_TO_BCD((-time_exp.tm_gmtoff) / 900);
ue_timezone.timezone |= 0x08;
}
ue_timezone.daylight_saving_time =
OGS_GTP_UE_TIME_ZONE_NO_ADJUSTMENT_FOR_DAYLIGHT_SAVING_TIME;
rsp->ue_time_zone.presence = 1;
rsp->ue_time_zone.data = &ue_timezone;
rsp->ue_time_zone.len = sizeof(ue_timezone);
gtp_message.h.type = type;
return ogs_gtp_build_msg(&gtp_message);
}
ogs_pkbuf_t *mme_s11_build_delete_bearer_response(
uint8_t type, mme_bearer_t *bearer, uint8_t cause_value)
{
ogs_gtp_message_t gtp_message;
ogs_gtp_delete_bearer_response_t *rsp = &gtp_message.delete_bearer_response;
ogs_gtp_cause_t cause;
ogs_gtp_uli_t uli;
char uli_buf[OGS_GTP_MAX_ULI_LEN];
ogs_gtp_ue_timezone_t ue_timezone;
struct timeval now;
struct tm time_exp;
mme_ue_t *mme_ue = NULL;
ogs_assert(bearer);
mme_ue = bearer->mme_ue;
ogs_assert(mme_ue);
ogs_debug("Delete Bearer Response");
ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
mme_ue->mme_s11_teid, mme_ue->sgw_s11_teid);
memset(&gtp_message, 0, sizeof(ogs_gtp_message_t));
/* Set Cause */
memset(&cause, 0, sizeof(cause));
cause.value = cause_value;
rsp->cause.presence = 1;
rsp->cause.len = sizeof(cause);
rsp->cause.data = &cause;
if (cause_value == OGS_GTP_CAUSE_REQUEST_ACCEPTED) {
mme_bearer_t *linked_bearer = mme_linked_bearer(bearer);
ogs_assert(linked_bearer);
if (bearer->ebi == linked_bearer->ebi) {
/*
* << Linked EPS Bearer ID >>
*
* 1. SMF sends Delete Bearer Request(DEFAULT BEARER) to SGW/MME.
* 2. MME sends Delete Bearer Response to SGW/SMF.
*
* OR
*
* 1. SMF sends Delete Bearer Request(DEFAULT BEARER) to ePDG.
* 2. ePDG sends Delete Bearer Response(DEFAULT BEARER) to SMF.
*/
rsp->linked_eps_bearer_id.presence = 1;
rsp->linked_eps_bearer_id.u8 = bearer->ebi;
} else {
/*
* << EPS Bearer IDs >>
*
* 1. MME sends Bearer Resource Command to SGW/SMF.
* 2. SMF sends Delete Bearer Request(DEDICATED BEARER) to SGW/MME.
* 3. MME sends Delete Bearer Response(DEDICATED BEARER) to SGW/SMF.
*
* OR
*
* 1. SMF sends Delete Bearer Request(DEDICATED BEARER) to SGW/MME.
* 2. MME sends Delete Bearer Response(DEDICATED BEARER) to SGW/SMF.
*/
/* Bearer Context : EBI */
rsp->bearer_contexts.presence = 1;
rsp->bearer_contexts.eps_bearer_id.presence = 1;
rsp->bearer_contexts.eps_bearer_id.u8 = bearer->ebi;
/* Bearer Context : Cause */
rsp->bearer_contexts.cause.presence = 1;
rsp->bearer_contexts.cause.len = sizeof(cause);
rsp->bearer_contexts.cause.data = &cause;
}
}
/* User Location Information(ULI) */
memset(&uli, 0, sizeof(ogs_gtp_uli_t));
uli.flags.e_cgi = 1;
uli.flags.tai = 1;
ogs_nas_from_plmn_id(&uli.tai.nas_plmn_id, &mme_ue->tai.plmn_id);
uli.tai.tac = mme_ue->tai.tac;
ogs_nas_from_plmn_id(&uli.e_cgi.nas_plmn_id, &mme_ue->e_cgi.plmn_id);
uli.e_cgi.cell_id = mme_ue->e_cgi.cell_id;
rsp->user_location_information.presence = 1;
ogs_gtp_build_uli(&rsp->user_location_information, &uli,
uli_buf, OGS_GTP_MAX_ULI_LEN);
/* UE Time Zone */
memset(&ue_timezone, 0, sizeof(ue_timezone));
ogs_gettimeofday(&now);
ogs_localtime(now.tv_sec, &time_exp);
if (time_exp.tm_gmtoff >= 0) {
ue_timezone.timezone = OGS_GTP_TIME_TO_BCD(time_exp.tm_gmtoff / 900);
} else {
ue_timezone.timezone = OGS_GTP_TIME_TO_BCD((-time_exp.tm_gmtoff) / 900);
ue_timezone.timezone |= 0x08;
}
ue_timezone.daylight_saving_time =
OGS_GTP_UE_TIME_ZONE_NO_ADJUSTMENT_FOR_DAYLIGHT_SAVING_TIME;
rsp->ue_time_zone.presence = 1;
rsp->ue_time_zone.data = &ue_timezone;
rsp->ue_time_zone.len = sizeof(ue_timezone);
gtp_message.h.type = type;
return ogs_gtp_build_msg(&gtp_message);
}
ogs_pkbuf_t *mme_s11_build_release_access_bearers_request(uint8_t type)
{
ogs_gtp_message_t gtp_message;
ogs_gtp_release_access_bearers_request_t *req =
&gtp_message.release_access_bearers_request;
ogs_debug("Release Access Bearers Request");
memset(&gtp_message, 0, sizeof(ogs_gtp_message_t));
req->originating_node.presence = 1;
req->originating_node.u8 = OGS_GTP_NODE_TYPE_MME;
gtp_message.h.type = type;
return ogs_gtp_build_msg(&gtp_message);
}
ogs_pkbuf_t *mme_s11_build_downlink_data_notification_ack(
uint8_t type, uint8_t cause_value)
{
ogs_gtp_message_t gtp_message;
ogs_gtp_downlink_data_notification_acknowledge_t *ack =
&gtp_message.downlink_data_notification_acknowledge;
ogs_gtp_cause_t cause;
ogs_debug("Downlink Data Notification Ackknowledge");
memset(&gtp_message, 0, sizeof(ogs_gtp_message_t));
memset(&cause, 0, sizeof(cause));
cause.value = cause_value;
ack->cause.presence = 1;
ack->cause.data = &cause;
ack->cause.len = sizeof(cause);
gtp_message.h.type = type;
return ogs_gtp_build_msg(&gtp_message);
}
ogs_pkbuf_t *mme_s11_build_create_indirect_data_forwarding_tunnel_request(
uint8_t type, mme_ue_t *mme_ue)
{
int rv;
int i;
mme_sess_t *sess = NULL;
mme_bearer_t *bearer = NULL;
ogs_gtp_message_t gtp_message;
ogs_gtp_create_indirect_data_forwarding_tunnel_request_t *req =
&gtp_message.create_indirect_data_forwarding_tunnel_request;
ogs_gtp_f_teid_t dl_teid[OGS_GTP_MAX_INDIRECT_TUNNEL];
ogs_gtp_f_teid_t ul_teid[OGS_GTP_MAX_INDIRECT_TUNNEL];
int len;
ogs_assert(mme_ue);
ogs_debug("Create Indirect Data Forwarding Tunnel Request");
ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
mme_ue->mme_s11_teid, mme_ue->sgw_s11_teid);
memset(&gtp_message, 0, sizeof(ogs_gtp_message_t));
i = 0;
sess = mme_sess_first(mme_ue);
while (sess != NULL) {
bearer = mme_bearer_first(sess);
while (bearer != NULL) {
if (MME_HAVE_ENB_DL_INDIRECT_TUNNEL(bearer)) {
memset(&dl_teid[i], 0, sizeof(ogs_gtp_f_teid_t));
dl_teid[i].interface_type =
OGS_GTP_F_TEID_ENODEB_GTP_U_FOR_DL_DATA_FORWARDING;
dl_teid[i].teid = htobe32(bearer->enb_dl_teid);
rv = ogs_gtp_ip_to_f_teid(
&bearer->enb_dl_ip, &dl_teid[i], &len);
ogs_expect_or_return_val(rv == OGS_OK, NULL);
req->bearer_contexts[i].s1_u_enodeb_f_teid.presence = 1;
req->bearer_contexts[i].s1_u_enodeb_f_teid.data = &dl_teid[i];
req->bearer_contexts[i].s1_u_enodeb_f_teid.len = len;
}
if (MME_HAVE_ENB_UL_INDIRECT_TUNNEL(bearer)) {
memset(&ul_teid[i], 0, sizeof(ogs_gtp_f_teid_t));
ul_teid[i].interface_type =
OGS_GTP_F_TEID_ENODEB_GTP_U_FOR_UL_DATA_FORWARDING;
ul_teid[i].teid = htobe32(bearer->enb_ul_teid);
rv = ogs_gtp_ip_to_f_teid(
&bearer->enb_ul_ip, &ul_teid[i], &len);
ogs_expect_or_return_val(rv == OGS_OK, NULL);
req->bearer_contexts[i].s12_rnc_f_teid.presence = 1;
req->bearer_contexts[i].s12_rnc_f_teid.data = &ul_teid[i];
req->bearer_contexts[i].s12_rnc_f_teid.len = len;
}
if (MME_HAVE_ENB_DL_INDIRECT_TUNNEL(bearer) ||
MME_HAVE_ENB_UL_INDIRECT_TUNNEL(bearer)) {
req->bearer_contexts[i].presence = 1;
req->bearer_contexts[i].eps_bearer_id.presence = 1;
req->bearer_contexts[i].eps_bearer_id.u8 = bearer->ebi;
i++;
}
bearer = mme_bearer_next(bearer);
}
sess = mme_sess_next(sess);
}
gtp_message.h.type = type;
return ogs_gtp_build_msg(&gtp_message);
}
ogs_pkbuf_t *mme_s11_build_bearer_resource_command(
uint8_t type, mme_bearer_t *bearer, ogs_nas_eps_message_t *nas_message)
{
ogs_gtp_message_t gtp_message;
ogs_gtp_bearer_resource_command_t *cmd =
&gtp_message.bearer_resource_command;
ogs_nas_eps_bearer_resource_allocation_request_t *allocation = NULL;
ogs_nas_eps_bearer_resource_modification_request_t *modification = NULL;
ogs_nas_eps_quality_of_service_t *qos = NULL;
ogs_nas_traffic_flow_aggregate_description_t *tad = NULL;
ogs_gtp_flow_qos_t flow_qos;
char flow_qos_buf[GTP_FLOW_QOS_LEN];
mme_ue_t *mme_ue = NULL;
mme_sess_t *sess = NULL;
mme_bearer_t *linked_bearer = NULL;
ogs_assert(bearer);
sess = bearer->sess;
ogs_assert(sess);
mme_ue = sess->mme_ue;
ogs_assert(mme_ue);
ogs_debug("Bearer Resource Command");
ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
mme_ue->mme_s11_teid, mme_ue->sgw_s11_teid);
ogs_assert(nas_message);
switch (nas_message->esm.h.message_type) {
case OGS_NAS_EPS_BEARER_RESOURCE_ALLOCATION_REQUEST:
allocation = &nas_message->esm.bearer_resource_allocation_request;
qos = &allocation->required_traffic_flow_qos;
tad = &allocation->traffic_flow_aggregate;
break;
case OGS_NAS_EPS_BEARER_RESOURCE_MODIFICATION_REQUEST:
modification = &nas_message->esm.bearer_resource_modification_request;
if (modification->presencemask &
OGS_NAS_EPS_BEARER_RESOURCE_MODIFICATION_REQUEST_REQUIRED_TRAFFIC_FLOW_QOS_PRESENT) {
qos = &modification->required_traffic_flow_qos;
}
tad = &modification->traffic_flow_aggregate;
break;
default:
ogs_error("Invalid NAS ESM Type[%d]", nas_message->esm.h.message_type);
return NULL;
}
linked_bearer = mme_linked_bearer(bearer);
ogs_assert(linked_bearer);
memset(&gtp_message, 0, sizeof(ogs_gtp_message_t));
/* Linked Bearer Context : EBI */
cmd->linked_eps_bearer_id.presence = 1;
cmd->linked_eps_bearer_id.u8 = linked_bearer->ebi;
/* Procedure Transaction ID(PTI) */
cmd->procedure_transaction_id.presence = 1;
cmd->procedure_transaction_id.u8 = sess->pti;
/* Flow Quality of Service(QoS) */
if (qos) {
memset(&flow_qos, 0, sizeof(flow_qos));
flow_qos.qci = qos->qci;
/* Octet 4
*
* In UE to network direction:
* 00000000 Subscribed maximum bit rate
*
* In network to UE direction:
* 00000000 Reserved
*/
flow_qos.ul_mbr = qos->ul_mbr == 0 ? bearer->qos.mbr.uplink :
ogs_gtp_qos_to_bps(
qos->ul_mbr, qos->ul_mbr_extended, qos->ul_mbr_extended2);
flow_qos.dl_mbr = qos->dl_mbr == 0 ? bearer->qos.mbr.downlink :
ogs_gtp_qos_to_bps(
qos->dl_mbr, qos->dl_mbr_extended, qos->dl_mbr_extended2);
flow_qos.ul_gbr = qos->ul_gbr == 0 ? bearer->qos.gbr.uplink :
ogs_gtp_qos_to_bps(
qos->ul_gbr, qos->ul_gbr_extended, qos->ul_gbr_extended2);
flow_qos.dl_gbr = qos->dl_gbr == 0 ? bearer->qos.gbr.downlink :
ogs_gtp_qos_to_bps(
qos->dl_gbr, qos->dl_gbr_extended, qos->dl_gbr_extended2);
ogs_gtp_build_flow_qos(
&cmd->flow_quality_of_service,
&flow_qos, flow_qos_buf, GTP_FLOW_QOS_LEN);
cmd->flow_quality_of_service.presence = 1;
}
/* Traffic Aggregate Description(TAD) */
cmd->traffic_aggregate_description.presence = 1;
cmd->traffic_aggregate_description.data = tad->buffer;
cmd->traffic_aggregate_description.len = tad->length;
switch (nas_message->esm.h.message_type) {
case OGS_NAS_EPS_BEARER_RESOURCE_ALLOCATION_REQUEST:
break;
case OGS_NAS_EPS_BEARER_RESOURCE_MODIFICATION_REQUEST:
/* Bearer Context : EBI */
cmd->eps_bearer_id.presence = 1;
cmd->eps_bearer_id.u8 = bearer->ebi;
break;
default:
ogs_error("Invalid NAS ESM Type[%d]", nas_message->esm.h.message_type);
return NULL;
}
gtp_message.h.type = type;
return ogs_gtp_build_msg(&gtp_message);
}
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