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open5gs/src/sgwc/s11-handler.c

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/*
* Copyright (C) 2019-2024 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 "gtp-path.h"
#include "pfcp-path.h"
#include "s11-handler.h"
static void gtp_sess_timeout(ogs_gtp_xact_t *xact, void *data)
{
sgwc_sess_t *sess = data;
sgwc_ue_t *sgwc_ue = NULL;
uint8_t type = 0;
ogs_assert(xact);
ogs_assert(sess);
sgwc_ue = sess->sgwc_ue;
ogs_assert(sgwc_ue);
type = xact->seq[0].type;
switch (type) {
case OGS_GTP2_DELETE_SESSION_REQUEST_TYPE:
ogs_error("[%s] No Delete Session Response", sgwc_ue->imsi_bcd);
if (!sgwc_sess_cycle(sess)) {
ogs_error("[%s] Session has already been removed",
sgwc_ue->imsi_bcd);
break;
}
ogs_assert(OGS_OK ==
sgwc_pfcp_send_session_deletion_request(sess, NULL, NULL));
break;
default:
ogs_error("GTP Timeout : IMSI[%s] Message-Type[%d]",
sgwc_ue->imsi_bcd, type);
}
}
static void gtp_bearer_timeout(ogs_gtp_xact_t *xact, void *data)
{
sgwc_bearer_t *bearer = data;
sgwc_sess_t *sess = NULL;
sgwc_ue_t *sgwc_ue = NULL;
uint8_t type = 0;
ogs_assert(xact);
ogs_assert(bearer);
sess = bearer->sess;
ogs_assert(sess);
sgwc_ue = sess->sgwc_ue;
ogs_assert(sgwc_ue);
type = xact->seq[0].type;
ogs_error("GTP Timeout : IMSI[%s] Message-Type[%d]",
sgwc_ue->imsi_bcd, type);
}
static void pfcp_sess_timeout(ogs_pfcp_xact_t *xact, void *data)
{
uint8_t type;
ogs_assert(xact);
type = xact->seq[0].type;
switch (type) {
case OGS_PFCP_SESSION_ESTABLISHMENT_REQUEST_TYPE:
ogs_error("No PFCP session establishment response");
break;
case OGS_PFCP_SESSION_MODIFICATION_REQUEST_TYPE:
ogs_error("No PFCP session modification response");
break;
case OGS_PFCP_SESSION_DELETION_REQUEST_TYPE:
ogs_error("No PFCP session deletion response");
break;
default:
ogs_error("Not implemented [type:%d]", type);
break;
}
}
/* This code was created in case it will be used later,
* and is currently not being used. */
static uint8_t pfcp_cause_from_gtp(uint8_t gtp_cause)
{
switch (gtp_cause) {
case OGS_GTP2_CAUSE_REQUEST_ACCEPTED:
return OGS_PFCP_CAUSE_REQUEST_ACCEPTED;
case OGS_GTP2_CAUSE_REQUEST_REJECTED_REASON_NOT_SPECIFIED:
return OGS_PFCP_CAUSE_REQUEST_REJECTED;
case OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND:
return OGS_PFCP_CAUSE_SESSION_CONTEXT_NOT_FOUND;
case OGS_GTP2_CAUSE_MANDATORY_IE_MISSING:
return OGS_PFCP_CAUSE_MANDATORY_IE_MISSING;
case OGS_GTP2_CAUSE_CONDITIONAL_IE_MISSING:
return OGS_PFCP_CAUSE_CONDITIONAL_IE_MISSING;
case OGS_GTP2_CAUSE_INVALID_LENGTH:
return OGS_PFCP_CAUSE_INVALID_LENGTH;
case OGS_GTP2_CAUSE_MANDATORY_IE_INCORRECT:
return OGS_PFCP_CAUSE_MANDATORY_IE_INCORRECT;
case OGS_GTP2_CAUSE_INVALID_MESSAGE_FORMAT:
return OGS_PFCP_CAUSE_INVALID_FORWARDING_POLICY;
case OGS_GTP2_CAUSE_REMOTE_PEER_NOT_RESPONDING:
return OGS_PFCP_CAUSE_NO_ESTABLISHED_PFCP_ASSOCIATION;
case OGS_GTP2_CAUSE_SEMANTIC_ERROR_IN_THE_TFT_OPERATION:
return OGS_PFCP_CAUSE_RULE_CREATION_MODIFICATION_FAILURE;
case OGS_GTP2_CAUSE_GTP_C_ENTITY_CONGESTION:
return OGS_PFCP_CAUSE_PFCP_ENTITY_IN_CONGESTION;
case OGS_GTP2_CAUSE_NO_RESOURCES_AVAILABLE:
return OGS_PFCP_CAUSE_NO_RESOURCES_AVAILABLE;
case OGS_GTP2_CAUSE_SERVICE_NOT_SUPPORTED:
return OGS_PFCP_CAUSE_SERVICE_NOT_SUPPORTED;
case OGS_GTP2_CAUSE_SYSTEM_FAILURE:
return OGS_PFCP_CAUSE_SYSTEM_FAILURE;
default:
return OGS_PFCP_CAUSE_SYSTEM_FAILURE;
}
return OGS_PFCP_CAUSE_SYSTEM_FAILURE;
}
void sgwc_s11_handle_create_session_request(
sgwc_ue_t *sgwc_ue, ogs_gtp_xact_t *s11_xact,
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
{
int i;
uint8_t cause_value = 0;
sgwc_sess_t *sess = NULL;
sgwc_bearer_t *bearer = NULL;
ogs_gtp2_create_session_request_t *req = NULL;
uint16_t decoded;
ogs_gtp2_f_teid_t *mme_s11_teid = NULL;
ogs_gtp2_f_teid_t *pgw_s5c_teid = NULL;
ogs_gtp2_uli_t uli;
ogs_gtp2_bearer_qos_t bearer_qos;
char apn[OGS_MAX_APN_LEN+1];
ogs_assert(s11_xact);
ogs_assert(gtpbuf);
ogs_assert(message);
req = &message->create_session_request;
ogs_assert(req);
ogs_debug("Create Session Request");
/************************
* Check SGWC-UE Context
************************/
cause_value = OGS_GTP2_CAUSE_REQUEST_ACCEPTED;
if (!sgwc_ue) {
ogs_error("No Context");
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
}
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
ogs_gtp2_send_error_message(s11_xact,
sgwc_ue ? OGS_GTP2_TEID_PRESENCE : OGS_GTP2_TEID_NO_PRESENCE,
sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
OGS_GTP2_CREATE_SESSION_RESPONSE_TYPE, cause_value);
return;
}
/*****************************************
* Check Mandatory/Conditional IE Missing
*****************************************/
ogs_assert(cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED);
if (req->imsi.presence == 0) {
ogs_error("No IMSI");
cause_value = OGS_GTP2_CAUSE_CONDITIONAL_IE_MISSING;
}
if (req->bearer_contexts_to_be_created[0].presence == 0) {
ogs_error("No Bearer");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (req->bearer_contexts_to_be_created[0].eps_bearer_id.presence == 0) {
ogs_error("No EPS Bearer ID");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (req->bearer_contexts_to_be_created[0].bearer_level_qos.presence == 0) {
ogs_error("No Bearer QoS");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (req->access_point_name.presence == 0) {
ogs_error("No APN");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (req->sender_f_teid_for_control_plane.presence == 0) {
ogs_error("No Sender F-TEID");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (req->pgw_s5_s8_address_for_control_plane_or_pmip.presence == 0) {
ogs_error("No PGW IP");
cause_value = OGS_GTP2_CAUSE_CONDITIONAL_IE_MISSING;
}
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
ogs_gtp2_send_error_message(s11_xact,
sgwc_ue ? OGS_GTP2_TEID_PRESENCE : OGS_GTP2_TEID_NO_PRESENCE,
sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
OGS_GTP2_CREATE_SESSION_RESPONSE_TYPE, cause_value);
return;
}
/* Add Session */
ogs_assert(0 < ogs_fqdn_parse(apn,
req->access_point_name.data,
ogs_min(req->access_point_name.len, OGS_MAX_APN_LEN)));
sess = sgwc_sess_find_by_ebi(sgwc_ue,
req->bearer_contexts_to_be_created[0].eps_bearer_id.u8);
if (sess) {
ogs_info("OLD Session Release [IMSI:%s,APN:%s]",
sgwc_ue->imsi_bcd, sess->session.name);
sgwc_sess_remove(sess);
}
sess = sgwc_sess_add(sgwc_ue, apn);
ogs_assert(sess);
ogs_info("UE IMSI[%s] APN[%s]", sgwc_ue->imsi_bcd, sess->session.name);
/* Set User Location Information */
if (req->user_location_information.presence == 1) {
decoded = ogs_gtp2_parse_uli(&uli, &req->user_location_information);
ogs_assert(req->user_location_information.len == decoded);
sgwc_ue->uli_presence = true;
ogs_nas_to_plmn_id(&sgwc_ue->e_tai.plmn_id, &uli.tai.nas_plmn_id);
sgwc_ue->e_tai.tac = uli.tai.tac;
ogs_nas_to_plmn_id(&sgwc_ue->e_cgi.plmn_id, &uli.e_cgi.nas_plmn_id);
sgwc_ue->e_cgi.cell_id = uli.e_cgi.cell_id;
ogs_debug(" TAI[PLMN_ID:%06x,TAC:%d]",
ogs_plmn_id_hexdump(&sgwc_ue->e_tai.plmn_id),
sgwc_ue->e_tai.tac);
ogs_debug(" E_CGI[PLMN_ID:%06x,CELL_ID:0x%x]",
ogs_plmn_id_hexdump(&sgwc_ue->e_cgi.plmn_id),
sgwc_ue->e_cgi.cell_id);
}
/* Select SGW-U based on UE Location Information */
sgwc_sess_select_sgwu(sess);
/* Check if selected SGW-U is associated with SGW-C */
ogs_assert(sess->pfcp_node);
if (!OGS_FSM_CHECK(&sess->pfcp_node->sm, sgwc_pfcp_state_associated)) {
ogs_gtp2_send_error_message(s11_xact,
sgwc_ue ? OGS_GTP2_TEID_PRESENCE : OGS_GTP2_TEID_NO_PRESENCE,
sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
OGS_GTP2_CREATE_SESSION_RESPONSE_TYPE,
OGS_GTP2_CAUSE_REMOTE_PEER_NOT_RESPONDING);
return;
}
/* Remove all previous bearer */
sgwc_bearer_remove_all(sess);
/* Setup Bearer */
for (i = 0; i < OGS_BEARER_PER_UE; i++) {
if (req->bearer_contexts_to_be_created[i].presence == 0)
break;
if (req->bearer_contexts_to_be_created[i].eps_bearer_id.presence == 0) {
ogs_error("No EPS Bearer ID");
break;
}
if (req->bearer_contexts_to_be_created[i].
bearer_level_qos.presence == 0) {
ogs_error("No Bearer QoS");
break;
}
decoded = ogs_gtp2_parse_bearer_qos(&bearer_qos,
&req->bearer_contexts_to_be_created[i].bearer_level_qos);
ogs_assert(decoded ==
req->bearer_contexts_to_be_created[i].bearer_level_qos.len);
bearer = sgwc_bearer_add(sess);
ogs_assert(bearer);
/* Set Bearer EBI */
bearer->ebi = req->bearer_contexts_to_be_created[i].eps_bearer_id.u8;
if (req->bearer_contexts_to_be_created[i].s1_u_enodeb_f_teid.presence) {
sgwc_tunnel_t *dl_tunnel = NULL;
ogs_pfcp_far_t *far = NULL;
ogs_gtp2_f_teid_t *enb_s1u_teid = NULL;
dl_tunnel = sgwc_dl_tunnel_in_bearer(bearer);
ogs_assert(dl_tunnel);
/* Data Plane(DL) : eNB-S1U */
enb_s1u_teid = req->bearer_contexts_to_be_created[i].
s1_u_enodeb_f_teid.data;
dl_tunnel->remote_teid = be32toh(enb_s1u_teid->teid);
ogs_assert(OGS_OK ==
ogs_gtp2_f_teid_to_ip(enb_s1u_teid, &dl_tunnel->remote_ip));
far = dl_tunnel->far;
ogs_assert(far);
far->apply_action = OGS_PFCP_APPLY_ACTION_FORW;
ogs_assert(OGS_OK == ogs_pfcp_ip_to_outer_header_creation(
&dl_tunnel->remote_ip, &far->outer_header_creation,
&far->outer_header_creation_len));
far->outer_header_creation.teid = dl_tunnel->remote_teid;
}
if (req->bearer_contexts_to_be_created[i].s5_s8_u_sgw_f_teid.presence) {
sgwc_tunnel_t *ul_tunnel = NULL;
ogs_pfcp_far_t *far = NULL;
ogs_gtp2_f_teid_t *pgw_s5u_teid = NULL;
ul_tunnel = sgwc_ul_tunnel_in_bearer(bearer);
ogs_assert(ul_tunnel);
/* Data Plane(UL) : PGW-S5U */
pgw_s5u_teid = req->bearer_contexts_to_be_created[i].
s5_s8_u_sgw_f_teid.data;
ul_tunnel->remote_teid = be32toh(pgw_s5u_teid->teid);
ogs_assert(OGS_OK ==
ogs_gtp2_f_teid_to_ip(pgw_s5u_teid, &ul_tunnel->remote_ip));
far = ul_tunnel->far;
ogs_assert(far);
far->apply_action = OGS_PFCP_APPLY_ACTION_FORW;
ogs_assert(OGS_OK == ogs_pfcp_ip_to_outer_header_creation(
&ul_tunnel->remote_ip, &far->outer_header_creation,
&far->outer_header_creation_len));
far->outer_header_creation.teid = ul_tunnel->remote_teid;
}
/* Set Session QoS from Default Bearer Level QoS */
if (i == 0) {
sess->session.qos.index = bearer_qos.qci;
sess->session.qos.arp.priority_level = bearer_qos.priority_level;
sess->session.qos.arp.pre_emption_capability =
bearer_qos.pre_emption_capability;
sess->session.qos.arp.pre_emption_vulnerability =
bearer_qos.pre_emption_vulnerability;
}
}
/* Receive Control Plane(DL) : MME-S11 */
mme_s11_teid = req->sender_f_teid_for_control_plane.data;
ogs_assert(mme_s11_teid);
sgwc_ue->mme_s11_teid = be32toh(mme_s11_teid->teid);
/* Receive Control Plane(UL) : PGW-S5C */
pgw_s5c_teid = req->pgw_s5_s8_address_for_control_plane_or_pmip.data;
ogs_assert(pgw_s5c_teid);
sess->pgw_s5c_teid = be32toh(pgw_s5c_teid->teid);
ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
sgwc_ue->mme_s11_teid, sgwc_ue->sgw_s11_teid);
ogs_assert(OGS_OK ==
sgwc_pfcp_send_session_establishment_request(
sess, s11_xact, gtpbuf, 0));
}
void sgwc_s11_handle_modify_bearer_request(
sgwc_ue_t *sgwc_ue, ogs_gtp_xact_t *s11_xact,
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
{
int i = 0;
uint16_t decoded;
uint8_t cause_value = 0;
OGS_LIST(pfcp_xact_list);
ogs_pfcp_xact_t *pfcp_xact = NULL;
sgwc_sess_t *sess = NULL;
sgwc_bearer_t *bearer = NULL;
sgwc_tunnel_t *dl_tunnel = NULL;
ogs_pfcp_far_t *far = NULL;
ogs_ip_t remote_ip;
ogs_ip_t zero_ip;
ogs_gtp2_modify_bearer_request_t *req = NULL;
ogs_gtp2_uli_t uli;
ogs_gtp2_f_teid_t *enb_s1u_teid = NULL;
ogs_assert(s11_xact);
ogs_assert(message);
req = &message->modify_bearer_request;
ogs_assert(req);
ogs_debug("Modify Bearer Request");
/************************
* Check SGWC-UE Context
************************/
cause_value = OGS_GTP2_CAUSE_REQUEST_ACCEPTED;
if (!sgwc_ue) {
ogs_error("No Context");
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
}
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
ogs_gtp2_send_error_message(s11_xact,
sgwc_ue ? OGS_GTP2_TEID_PRESENCE : OGS_GTP2_TEID_NO_PRESENCE,
sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
OGS_GTP2_MODIFY_BEARER_RESPONSE_TYPE, cause_value);
return;
}
/*****************************************
* Check Mandatory/Conditional IE Missing
*****************************************/
ogs_assert(cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED);
for (i = 0; i < OGS_BEARER_PER_UE; i++) {
ogs_pfcp_xact_t *current_xact = NULL;
if (req->bearer_contexts_to_be_modified[i].presence == 0) {
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
break;
}
if (req->bearer_contexts_to_be_modified[i].eps_bearer_id.
presence == 0) {
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
break;
}
if (req->bearer_contexts_to_be_modified[i].s1_u_enodeb_f_teid.
presence == 0) {
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
break;
}
bearer = sgwc_bearer_find_by_ue_ebi(sgwc_ue,
req->bearer_contexts_to_be_modified[i].eps_bearer_id.u8);
if (!bearer) {
ogs_error("Unknown EPS Bearer ID[%d]",
req->bearer_contexts_to_be_modified[i].eps_bearer_id.u8);
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
break;
}
sess = bearer->sess;
ogs_assert(sess);
ogs_list_for_each_entry(&pfcp_xact_list, pfcp_xact, tmpnode) {
if (sess == pfcp_xact->data) {
current_xact = pfcp_xact;
break;
}
}
if (!current_xact) {
current_xact = ogs_pfcp_xact_local_create(
sess->pfcp_node, pfcp_sess_timeout, sess);
ogs_assert(current_xact);
current_xact->assoc_xact = s11_xact;
current_xact->modify_flags = OGS_PFCP_MODIFY_SESSION|
OGS_PFCP_MODIFY_DL_ONLY|OGS_PFCP_MODIFY_ACTIVATE;
if (gtpbuf) {
current_xact->gtpbuf = ogs_pkbuf_copy(gtpbuf);
ogs_assert(current_xact->gtpbuf);
}
current_xact->local_seid = sess->sgwc_sxa_seid;
ogs_list_add(&pfcp_xact_list, &current_xact->tmpnode);
}
dl_tunnel = sgwc_dl_tunnel_in_bearer(bearer);
ogs_assert(dl_tunnel);
/* Data Plane(DL) : eNB-S1U */
enb_s1u_teid =
req->bearer_contexts_to_be_modified[i].s1_u_enodeb_f_teid.data;
dl_tunnel->remote_teid = be32toh(enb_s1u_teid->teid);
ogs_assert(OGS_OK == ogs_gtp2_f_teid_to_ip(enb_s1u_teid, &remote_ip));
memset(&zero_ip, 0, sizeof(ogs_ip_t));
if (memcmp(&dl_tunnel->remote_ip, &zero_ip, sizeof(ogs_ip_t)) != 0 &&
memcmp(&dl_tunnel->remote_ip, &remote_ip, sizeof(ogs_ip_t)) != 0) {
ogs_assert(sess->pfcp_node);
/* eNB IP is changed during handover */
if (sess->pfcp_node->up_function_features.empu) {
current_xact->modify_flags |= OGS_PFCP_MODIFY_END_MARKER;
} else {
ogs_error("SGW-U does not support End Marker");
}
}
memcpy(&dl_tunnel->remote_ip, &remote_ip, sizeof(ogs_ip_t));
far = dl_tunnel->far;
ogs_assert(far);
far->apply_action = OGS_PFCP_APPLY_ACTION_FORW;
ogs_assert(OGS_OK ==
ogs_pfcp_ip_to_outer_header_creation(&dl_tunnel->remote_ip,
&far->outer_header_creation, &far->outer_header_creation_len));
far->outer_header_creation.teid = dl_tunnel->remote_teid;
ogs_list_add(&current_xact->bearer_to_modify_list,
&bearer->to_modify_node);
}
if (i == 0) {
ogs_error("No Bearer");
ogs_gtp2_send_error_message(s11_xact,
sgwc_ue ? OGS_GTP2_TEID_PRESENCE : OGS_GTP2_TEID_NO_PRESENCE,
sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
OGS_GTP2_MODIFY_BEARER_RESPONSE_TYPE, cause_value);
return;
}
if (req->user_location_information.presence == 1) {
decoded = ogs_gtp2_parse_uli(&uli, &req->user_location_information);
ogs_assert(req->user_location_information.len == decoded);
sgwc_ue->uli_presence = true;
ogs_nas_to_plmn_id(&sgwc_ue->e_tai.plmn_id, &uli.tai.nas_plmn_id);
sgwc_ue->e_tai.tac = uli.tai.tac;
ogs_nas_to_plmn_id(&sgwc_ue->e_cgi.plmn_id, &uli.e_cgi.nas_plmn_id);
sgwc_ue->e_cgi.cell_id = uli.e_cgi.cell_id;
ogs_debug(" TAI[PLMN_ID:%06x,TAC:%d]",
ogs_plmn_id_hexdump(&sgwc_ue->e_tai.plmn_id),
sgwc_ue->e_tai.tac);
ogs_debug(" E_CGI[PLMN_ID:%06x,CELL_ID:0x%x]",
ogs_plmn_id_hexdump(&sgwc_ue->e_cgi.plmn_id),
sgwc_ue->e_cgi.cell_id);
}
ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
sgwc_ue->mme_s11_teid, sgwc_ue->sgw_s11_teid);
ogs_debug(" ENB_S1U_TEID[%d] SGW_S1U_TEID[%d]",
dl_tunnel->remote_teid, dl_tunnel->local_teid);
ogs_list_for_each_entry(&pfcp_xact_list, pfcp_xact, tmpnode)
sgwc_pfcp_send_bearer_to_modify_list(pfcp_xact->data, pfcp_xact);
}
void sgwc_s11_handle_delete_session_request(
sgwc_ue_t *sgwc_ue, ogs_gtp_xact_t *s11_xact,
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
{
int rv;
uint8_t cause_value = 0;
sgwc_sess_t *sess = NULL;
ogs_gtp_xact_t *s5c_xact = NULL;
ogs_gtp2_delete_session_request_t *req = NULL;
ogs_gtp2_indication_t *indication = NULL;
ogs_assert(s11_xact);
ogs_assert(gtpbuf);
ogs_assert(message);
req = &message->delete_session_request;
ogs_assert(req);
ogs_debug("Delete Session Request");
/************************
* Check SGWC-UE Context
************************/
cause_value = OGS_GTP2_CAUSE_REQUEST_ACCEPTED;
if (!sgwc_ue) {
ogs_error("No Context");
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
} else {
if (req->linked_eps_bearer_id.presence == 0) {
ogs_error("No EPS Bearer ID");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
sess = sgwc_sess_find_by_ebi(sgwc_ue, req->linked_eps_bearer_id.u8);
if (!sess) {
ogs_error("Unknown EPS Bearer [IMSI:%s, EBI:%d]",
sgwc_ue->imsi_bcd, req->linked_eps_bearer_id.u8);
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
}
}
}
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
ogs_gtp2_send_error_message(s11_xact,
sgwc_ue ? OGS_GTP2_TEID_PRESENCE : OGS_GTP2_TEID_NO_PRESENCE,
sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
OGS_GTP2_DELETE_SESSION_RESPONSE_TYPE, cause_value);
return;
}
/*****************************************
* Check Mandatory/Conditional IE Missing
*****************************************/
ogs_assert(cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED);
if (req->indication_flags.presence &&
req->indication_flags.data && req->indication_flags.len) {
indication = req->indication_flags.data;
}
if (indication &&
indication->operation_indication == 1 &&
indication->scope_indication == 1) {
ogs_error("Invalid Indication");
ogs_gtp2_send_error_message(s11_xact,
sgwc_ue ? OGS_GTP2_TEID_PRESENCE : OGS_GTP2_TEID_NO_PRESENCE,
sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
OGS_GTP2_DELETE_SESSION_RESPONSE_TYPE,
OGS_GTP2_CAUSE_INVALID_MESSAGE_FORMAT);
return;
}
/********************
* Check ALL Context
********************/
ogs_assert(sgwc_ue);
ogs_assert(sess);
ogs_assert(sess->gnode);
ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
sgwc_ue->mme_s11_teid, sgwc_ue->sgw_s11_teid);
ogs_debug(" SGW_S5C_TEID[0x%x] PGW_S5C_TEID[0x%x]",
sess->sgw_s5c_teid, sess->pgw_s5c_teid);
if (indication &&
indication->operation_indication == 0 &&
indication->scope_indication == 1) {
ogs_assert(OGS_OK ==
sgwc_pfcp_send_session_deletion_request(sess, s11_xact, gtpbuf));
} else {
message->h.type = OGS_GTP2_DELETE_SESSION_REQUEST_TYPE;
message->h.teid_presence = OGS_GTP2_TEID_PRESENCE;
message->h.teid = sess->pgw_s5c_teid;
gtpbuf = ogs_gtp2_build_msg(message);
if (!gtpbuf) {
ogs_error("ogs_gtp2_build_msg() failed");
return;
}
s5c_xact = ogs_gtp_xact_local_create(
sess->gnode, &message->h, gtpbuf, gtp_sess_timeout, sess);
if (!s5c_xact) {
ogs_error("ogs_gtp_xact_local_create() failed");
return;
}
s5c_xact->local_teid = sess->sgw_s5c_teid;
ogs_gtp_xact_associate(s11_xact, s5c_xact);
rv = ogs_gtp_xact_commit(s5c_xact);
ogs_expect(rv == OGS_OK);
}
}
void sgwc_s11_handle_create_bearer_response(
sgwc_ue_t *sgwc_ue, ogs_gtp_xact_t *s11_xact,
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
{
int rv;
ogs_gtp2_cause_t *cause = NULL;
uint8_t cause_value;
uint16_t decoded;
sgwc_sess_t *sess = NULL;
sgwc_bearer_t *bearer = NULL;
sgwc_tunnel_t *dl_tunnel = NULL, *ul_tunnel = NULL;
ogs_pfcp_far_t *far = NULL;
ogs_gtp_xact_t *s5c_xact = NULL;
ogs_gtp2_create_bearer_response_t *rsp = NULL;
ogs_gtp2_f_teid_t *sgw_s1u_teid = NULL, *enb_s1u_teid = NULL;
ogs_gtp2_uli_t uli;
ogs_assert(sgwc_ue);
ogs_assert(message);
rsp = &message->create_bearer_response;
ogs_assert(rsp);
ogs_debug("Create Bearer Response");
/********************
* Check Transaction
********************/
ogs_assert(s11_xact);
s5c_xact = s11_xact->assoc_xact;
ogs_assert(s5c_xact);
if (s11_xact->xid & OGS_GTP_CMD_XACT_ID)
/* MME received Bearer Resource Modification Request */
bearer = s5c_xact->data;
else
bearer = s11_xact->data;
ogs_assert(bearer);
sess = bearer->sess;
ogs_assert(sess);
rv = ogs_gtp_xact_commit(s11_xact);
ogs_expect(rv == OGS_OK);
/*****************************************
* Check Mandatory/Conditional IE Missing
*****************************************/
cause_value = OGS_GTP2_CAUSE_REQUEST_ACCEPTED;
if (rsp->bearer_contexts.presence == 0) {
ogs_error("No Bearer");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (rsp->bearer_contexts.eps_bearer_id.presence == 0) {
ogs_error("No EPS Bearer ID");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (rsp->bearer_contexts.s1_u_enodeb_f_teid.presence == 0) {
ogs_error("No eNB TEID");
cause_value = OGS_GTP2_CAUSE_CONDITIONAL_IE_MISSING;
}
if (rsp->bearer_contexts.s4_u_sgsn_f_teid.presence == 0) {
ogs_error("No SGW TEID");
cause_value = OGS_GTP2_CAUSE_CONDITIONAL_IE_MISSING;
}
if (rsp->cause.presence == 0) {
ogs_error("No Cause");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (rsp->bearer_contexts.cause.presence == 0) {
ogs_error("No Bearer Cause");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
ogs_assert(OGS_OK ==
sgwc_pfcp_send_bearer_modification_request(
bearer, NULL, NULL,
OGS_PFCP_MODIFY_UL_ONLY|OGS_PFCP_MODIFY_REMOVE));
ogs_gtp2_send_error_message(s5c_xact,
sess ? OGS_GTP2_TEID_PRESENCE : OGS_GTP2_TEID_NO_PRESENCE,
sess ? sess->pgw_s5c_teid : 0,
OGS_GTP2_CREATE_BEARER_RESPONSE_TYPE, cause_value);
return;
}
/********************
* Check Cause Value
********************/
ogs_assert(cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED);
cause = rsp->bearer_contexts.cause.data;
ogs_assert(cause);
cause_value = cause->value;
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
ogs_error("GTP Cause [Value:%d]", cause_value);
ogs_assert(OGS_OK ==
sgwc_pfcp_send_bearer_modification_request(
bearer, NULL, NULL,
OGS_PFCP_MODIFY_UL_ONLY|OGS_PFCP_MODIFY_REMOVE));
ogs_gtp2_send_error_message(s5c_xact,
sess ? OGS_GTP2_TEID_PRESENCE : OGS_GTP2_TEID_NO_PRESENCE,
sess ? sess->pgw_s5c_teid : 0,
OGS_GTP2_CREATE_BEARER_RESPONSE_TYPE, cause_value);
return;
}
/********************
* Check ALL Context
********************/
ogs_assert(sgwc_ue);
ogs_assert(sess);
ogs_assert(bearer);
/* Correlate with SGW-S1U-TEID */
sgw_s1u_teid = rsp->bearer_contexts.s4_u_sgsn_f_teid.data;
ogs_assert(sgw_s1u_teid);
/* Find the Tunnel by SGW-S1U-TEID */
ul_tunnel = sgwc_tunnel_find_by_teid(sgwc_ue, be32toh(sgw_s1u_teid->teid));
ogs_assert(ul_tunnel);
dl_tunnel = sgwc_dl_tunnel_in_bearer(bearer);
ogs_assert(dl_tunnel);
/* Set EBI */
bearer->ebi = rsp->bearer_contexts.eps_bearer_id.u8;
/* Data Plane(DL) : eNB-S1U */
enb_s1u_teid = rsp->bearer_contexts.s1_u_enodeb_f_teid.data;
dl_tunnel->remote_teid = be32toh(enb_s1u_teid->teid);
ogs_debug(" ENB_S1U_TEID[%d] SGW_S1U_TEID[%d]",
dl_tunnel->remote_teid, dl_tunnel->local_teid);
ogs_assert(OGS_OK ==
ogs_gtp2_f_teid_to_ip(enb_s1u_teid, &dl_tunnel->remote_ip));
far = dl_tunnel->far;
ogs_assert(far);
far->apply_action = OGS_PFCP_APPLY_ACTION_FORW;
ogs_assert(OGS_OK ==
ogs_pfcp_ip_to_outer_header_creation(&dl_tunnel->remote_ip,
&far->outer_header_creation, &far->outer_header_creation_len));
far->outer_header_creation.teid = dl_tunnel->remote_teid;
if (rsp->user_location_information.presence == 1) {
decoded = ogs_gtp2_parse_uli(&uli, &rsp->user_location_information);
ogs_assert(rsp->user_location_information.len == decoded);
sgwc_ue->uli_presence = true;
ogs_nas_to_plmn_id(&sgwc_ue->e_tai.plmn_id, &uli.tai.nas_plmn_id);
sgwc_ue->e_tai.tac = uli.tai.tac;
ogs_nas_to_plmn_id(&sgwc_ue->e_cgi.plmn_id, &uli.e_cgi.nas_plmn_id);
sgwc_ue->e_cgi.cell_id = uli.e_cgi.cell_id;
ogs_debug(" TAI[PLMN_ID:%06x,TAC:%d]",
ogs_plmn_id_hexdump(&sgwc_ue->e_tai.plmn_id),
sgwc_ue->e_tai.tac);
ogs_debug(" E_CGI[PLMN_ID:%06x,CELL_ID:0x%x]",
ogs_plmn_id_hexdump(&sgwc_ue->e_cgi.plmn_id),
sgwc_ue->e_cgi.cell_id);
}
ogs_assert(OGS_OK ==
sgwc_pfcp_send_bearer_modification_request(
bearer, s5c_xact, gtpbuf,
OGS_PFCP_MODIFY_DL_ONLY|OGS_PFCP_MODIFY_CREATE));
}
void sgwc_s11_handle_update_bearer_response(
sgwc_ue_t *sgwc_ue, ogs_gtp_xact_t *s11_xact,
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
{
int rv;
ogs_gtp2_cause_t *cause = NULL;
uint8_t cause_value;
ogs_pkbuf_t *pkbuf = NULL;
ogs_gtp_xact_t *s5c_xact = NULL;
sgwc_sess_t *sess = NULL;
sgwc_bearer_t *bearer = NULL;
ogs_gtp2_update_bearer_response_t *rsp = NULL;
ogs_assert(sgwc_ue);
ogs_assert(message);
rsp = &message->update_bearer_response;
ogs_assert(rsp);
ogs_debug("Update Bearer Response");
/********************
* Check Transaction
********************/
ogs_assert(s11_xact);
s5c_xact = s11_xact->assoc_xact;
ogs_assert(s5c_xact);
if (s11_xact->xid & OGS_GTP_CMD_XACT_ID)
/* MME received Bearer Resource Modification Request */
bearer = s5c_xact->data;
else
bearer = s11_xact->data;
ogs_assert(bearer);
sess = bearer->sess;
ogs_assert(sess);
rv = ogs_gtp_xact_commit(s11_xact);
ogs_expect(rv == OGS_OK);
/*****************************************
* Check Mandatory/Conditional IE Missing
*****************************************/
cause_value = OGS_GTP2_CAUSE_REQUEST_ACCEPTED;
if (rsp->bearer_contexts.presence == 0) {
ogs_error("No Bearer");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (rsp->bearer_contexts.eps_bearer_id.presence == 0) {
ogs_error("No EPS Bearer ID");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (rsp->cause.presence == 0) {
ogs_error("No Cause");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (rsp->bearer_contexts.cause.presence == 0) {
ogs_error("No Bearer Cause");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
ogs_gtp2_send_error_message(s5c_xact,
sess ? OGS_GTP2_TEID_PRESENCE : OGS_GTP2_TEID_NO_PRESENCE,
sess ? sess->pgw_s5c_teid : 0,
OGS_GTP2_UPDATE_BEARER_RESPONSE_TYPE, cause_value);
return;
}
/********************
* Check Cause Value
********************/
ogs_assert(cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED);
cause = rsp->bearer_contexts.cause.data;
ogs_assert(cause);
cause_value = cause->value;
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
ogs_error("GTP Bearer Cause [VALUE:%d]", cause_value);
ogs_gtp2_send_error_message(s5c_xact,
sess ? OGS_GTP2_TEID_PRESENCE : OGS_GTP2_TEID_NO_PRESENCE,
sess ? sess->pgw_s5c_teid : 0,
OGS_GTP2_UPDATE_BEARER_RESPONSE_TYPE, cause_value);
return;
}
cause = rsp->cause.data;
ogs_assert(cause);
cause_value = cause->value;
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
ogs_error("GTP Cause [Value:%d]", cause_value);
ogs_gtp2_send_error_message(s5c_xact,
sess ? OGS_GTP2_TEID_PRESENCE : OGS_GTP2_TEID_NO_PRESENCE,
sess ? sess->pgw_s5c_teid : 0,
OGS_GTP2_UPDATE_BEARER_RESPONSE_TYPE, cause_value);
return;
}
/********************
* Check ALL Context
********************/
ogs_assert(sgwc_ue);
ogs_assert(sess);
ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
sgwc_ue->mme_s11_teid, sgwc_ue->sgw_s11_teid);
ogs_debug(" SGW_S5C_TEID[0x%x] PGW_S5C_TEID[0x%x]",
sess->sgw_s5c_teid, sess->pgw_s5c_teid);
message->h.type = OGS_GTP2_UPDATE_BEARER_RESPONSE_TYPE;
message->h.teid_presence = OGS_GTP2_TEID_PRESENCE;
message->h.teid = sess->pgw_s5c_teid;
pkbuf = ogs_gtp2_build_msg(message);
if (!pkbuf) {
ogs_error("ogs_gtp2_build_msg() failed");
return;
}
rv = ogs_gtp_xact_update_tx(s5c_xact, &message->h, pkbuf);
if (rv != OGS_OK) {
ogs_error("ogs_gtp_xact_update_tx() failed");
return;
}
rv = ogs_gtp_xact_commit(s5c_xact);
ogs_expect(rv == OGS_OK);
}
void sgwc_s11_handle_delete_bearer_response(
sgwc_ue_t *sgwc_ue, ogs_gtp_xact_t *s11_xact,
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
{
int rv;
uint8_t cause_value;
ogs_gtp_xact_t *s5c_xact = NULL;
sgwc_sess_t *sess = NULL;
sgwc_bearer_t *bearer = NULL;
ogs_gtp2_delete_bearer_response_t *rsp = NULL;
ogs_assert(sgwc_ue);
ogs_assert(message);
rsp = &message->delete_bearer_response;
ogs_assert(rsp);
ogs_debug("Delete Bearer Response");
/********************
* Check Transaction
********************/
ogs_assert(s11_xact);
s5c_xact = s11_xact->assoc_xact;
ogs_assert(s5c_xact);
if (s11_xact->xid & OGS_GTP_CMD_XACT_ID)
/* MME received Bearer Resource Modification Request */
bearer = s5c_xact->data;
else
bearer = s11_xact->data;
ogs_assert(bearer);
sess = bearer->sess;
ogs_assert(sess);
rv = ogs_gtp_xact_commit(s11_xact);
ogs_expect(rv == OGS_OK);
/************************
* Check SGWC-UE Context
************************/
cause_value = OGS_GTP2_CAUSE_REQUEST_ACCEPTED;
if (rsp->linked_eps_bearer_id.presence) {
/*
* << 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.
*/
if (rsp->cause.presence) {
ogs_gtp2_cause_t *cause = rsp->cause.data;
ogs_assert(cause);
cause_value = cause->value;
if (cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
} else {
ogs_error("GTP Cause [Value:%d]", cause_value);
}
} else {
ogs_error("No Cause");
}
ogs_assert(OGS_OK ==
sgwc_pfcp_send_session_deletion_request(sess, s5c_xact, gtpbuf));
} 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.
*/
if (rsp->bearer_contexts.presence == 0) {
ogs_error("No Bearer");
}
if (rsp->bearer_contexts.eps_bearer_id.presence == 0) {
ogs_error("No EPS Bearer ID");
}
if (rsp->cause.presence) {
ogs_gtp2_cause_t *cause = rsp->cause.data;
ogs_assert(cause);
cause_value = cause->value;
if (cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
if (rsp->bearer_contexts.cause.presence) {
cause = rsp->bearer_contexts.cause.data;
ogs_assert(cause);
if (cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
} else {
ogs_error("GTP Cause [Value:%d]", cause_value);
}
} else {
ogs_error("No Cause");
}
} else {
ogs_error("GTP Cause [Value:%d]", cause_value);
}
} else {
ogs_error("No Cause");
}
ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
sgwc_ue->mme_s11_teid, sgwc_ue->sgw_s11_teid);
ogs_debug(" SGW_S5C_TEID[0x%x] PGW_S5C_TEID[0x%x]",
sess->sgw_s5c_teid, sess->pgw_s5c_teid);
ogs_assert(OGS_OK ==
sgwc_pfcp_send_bearer_modification_request(
bearer, s5c_xact, gtpbuf, OGS_PFCP_MODIFY_REMOVE));
}
}
void sgwc_s11_handle_release_access_bearers_request(
sgwc_ue_t *sgwc_ue, ogs_gtp_xact_t *s11_xact,
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
{
sgwc_sess_t *sess = NULL;
uint8_t cause_value;
ogs_gtp2_release_access_bearers_request_t *req = NULL;
ogs_assert(s11_xact);
ogs_assert(message);
req = &message->release_access_bearers_request;
ogs_assert(req);
ogs_debug("Release Access Bearers Request");
/************************
* Check SGWC-UE Context
************************/
cause_value = OGS_GTP2_CAUSE_REQUEST_ACCEPTED;
if (!sgwc_ue) {
ogs_error("No Context");
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
}
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
ogs_gtp2_send_error_message(s11_xact,
sgwc_ue ? OGS_GTP2_TEID_PRESENCE : OGS_GTP2_TEID_NO_PRESENCE,
sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
OGS_GTP2_RELEASE_ACCESS_BEARERS_RESPONSE_TYPE, cause_value);
return;
}
/********************
* Check ALL Context
********************/
ogs_assert(sgwc_ue);
ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
sgwc_ue->mme_s11_teid, sgwc_ue->sgw_s11_teid);
ogs_list_for_each(&sgwc_ue->sess_list, sess) {
ogs_assert(OGS_OK ==
sgwc_pfcp_send_session_modification_request(
sess, s11_xact, gtpbuf,
OGS_PFCP_MODIFY_DL_ONLY|OGS_PFCP_MODIFY_DEACTIVATE));
}
}
void sgwc_s11_handle_downlink_data_notification_ack(
sgwc_ue_t *sgwc_ue, ogs_gtp_xact_t *s11_xact,
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
{
int rv;
uint8_t cause_value;
sgwc_bearer_t *bearer = NULL;
sgwc_sess_t *sess = NULL;
ogs_gtp2_downlink_data_notification_acknowledge_t *ack = NULL;
ogs_assert(message);
ack = &message->downlink_data_notification_acknowledge;
ogs_assert(ack);
/********************
* Check Transaction
********************/
ogs_assert(s11_xact);
bearer = s11_xact->data;
ogs_assert(bearer);
sess = bearer->sess;
ogs_assert(sess);
rv = ogs_gtp_xact_commit(s11_xact);
ogs_expect(rv == OGS_OK);
/************************
* Check SGWC-UE Context
************************/
if (ack->cause.presence) {
ogs_gtp2_cause_t *cause = ack->cause.data;
ogs_assert(cause);
cause_value = cause->value;
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED &&
cause_value != OGS_GTP2_CAUSE_UE_ALREADY_RE_ATTACHED)
ogs_warn("GTP Cause [Value:%d] - PFCP_CAUSE[%d]",
cause_value, pfcp_cause_from_gtp(cause_value));
} else {
ogs_error("No Cause");
}
ogs_debug("Downlink Data Notification Acknowledge");
if (sgwc_ue) {
ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
sgwc_ue->mme_s11_teid, sgwc_ue->sgw_s11_teid);
}
}
void sgwc_s11_handle_create_indirect_data_forwarding_tunnel_request(
sgwc_ue_t *sgwc_ue, ogs_gtp_xact_t *s11_xact,
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
{
int rv, i;
sgwc_sess_t *sess = NULL;
sgwc_bearer_t *bearer = NULL;
sgwc_tunnel_t *tunnel = NULL;
ogs_pfcp_far_t *far = NULL;
ogs_gtp2_create_indirect_data_forwarding_tunnel_request_t *req = NULL;
ogs_gtp2_f_teid_t *req_teid = NULL;
uint8_t cause_value = 0;
ogs_assert(s11_xact);
ogs_assert(message);
req = &message->create_indirect_data_forwarding_tunnel_request;
ogs_assert(req);
ogs_debug("Create Indirect Data Forwarding Tunnel Request");
/************************
* Check SGWC-UE Context
************************/
cause_value = OGS_GTP2_CAUSE_REQUEST_ACCEPTED;
if (!sgwc_ue) {
ogs_error("No Context");
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
}
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
ogs_gtp2_send_error_message(s11_xact,
sgwc_ue ? OGS_GTP2_TEID_PRESENCE : OGS_GTP2_TEID_NO_PRESENCE,
sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
OGS_GTP2_CREATE_INDIRECT_DATA_FORWARDING_TUNNEL_RESPONSE_TYPE,
cause_value);
return;
}
/********************
* Check ALL Context
********************/
ogs_assert(sgwc_ue);
ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
sgwc_ue->mme_s11_teid, sgwc_ue->sgw_s11_teid);
for (i = 0; req->bearer_contexts[i].presence; i++) {
if (req->bearer_contexts[i].eps_bearer_id.presence == 0) {
ogs_error("No EBI");
ogs_gtp2_send_error_message(s11_xact,
sgwc_ue ? OGS_GTP2_TEID_PRESENCE : OGS_GTP2_TEID_NO_PRESENCE,
sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
OGS_GTP2_CREATE_INDIRECT_DATA_FORWARDING_TUNNEL_RESPONSE_TYPE,
OGS_GTP2_CAUSE_MANDATORY_IE_MISSING);
return;
}
bearer = sgwc_bearer_find_by_ue_ebi(sgwc_ue,
req->bearer_contexts[i].eps_bearer_id.u8);
ogs_assert(bearer);
if (req->bearer_contexts[i].s1_u_enodeb_f_teid.presence) {
req_teid = req->bearer_contexts[i].s1_u_enodeb_f_teid.data;
ogs_assert(req_teid);
tunnel = sgwc_tunnel_add(bearer,
OGS_GTP2_F_TEID_SGW_GTP_U_FOR_DL_DATA_FORWARDING);
ogs_assert(tunnel);
tunnel->remote_teid = be32toh(req_teid->teid);
rv = ogs_gtp2_f_teid_to_ip(req_teid, &tunnel->remote_ip);
if (rv != OGS_OK) {
ogs_gtp2_send_error_message(s11_xact,
sgwc_ue ? OGS_GTP2_TEID_PRESENCE : OGS_GTP2_TEID_NO_PRESENCE,
sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
OGS_GTP2_CREATE_INDIRECT_DATA_FORWARDING_TUNNEL_RESPONSE_TYPE,
OGS_GTP2_CAUSE_MANDATORY_IE_MISSING);
return;
}
far = tunnel->far;
ogs_assert(far);
far->apply_action = OGS_PFCP_APPLY_ACTION_FORW;
ogs_assert(OGS_OK ==
ogs_pfcp_ip_to_outer_header_creation(
&tunnel->remote_ip,
&far->outer_header_creation,
&far->outer_header_creation_len));
far->outer_header_creation.teid = tunnel->remote_teid;
ogs_debug(" SGW_DL_TEID[%d] ENB_DL_TEID[%d]",
tunnel->local_teid, tunnel->remote_teid);
}
if (req->bearer_contexts[i].s12_rnc_f_teid.presence) {
req_teid = req->bearer_contexts[i].s12_rnc_f_teid.data;
ogs_assert(req_teid);
tunnel = sgwc_tunnel_add(bearer,
OGS_GTP2_F_TEID_SGW_GTP_U_FOR_UL_DATA_FORWARDING);
ogs_assert(tunnel);
tunnel->remote_teid = be32toh(req_teid->teid);
rv = ogs_gtp2_f_teid_to_ip(req_teid, &tunnel->remote_ip);
if (rv != OGS_OK) {
ogs_gtp2_send_error_message(s11_xact,
sgwc_ue ? OGS_GTP2_TEID_PRESENCE : OGS_GTP2_TEID_NO_PRESENCE,
sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
OGS_GTP2_CREATE_INDIRECT_DATA_FORWARDING_TUNNEL_RESPONSE_TYPE,
OGS_GTP2_CAUSE_MANDATORY_IE_MISSING);
return;
}
far = tunnel->far;
ogs_assert(far);
far->apply_action = OGS_PFCP_APPLY_ACTION_FORW;
ogs_assert(OGS_OK ==
ogs_pfcp_ip_to_outer_header_creation(
&tunnel->remote_ip,
&far->outer_header_creation,
&far->outer_header_creation_len));
far->outer_header_creation.teid = tunnel->remote_teid;
ogs_debug(" SGW_UL_TEID[%d] ENB_UL_TEID[%d]",
tunnel->local_teid, tunnel->remote_teid);
}
}
ogs_list_for_each(&sgwc_ue->sess_list, sess) {
ogs_assert(OGS_OK ==
sgwc_pfcp_send_session_modification_request(
sess, s11_xact, gtpbuf,
OGS_PFCP_MODIFY_INDIRECT|OGS_PFCP_MODIFY_CREATE));
}
}
void sgwc_s11_handle_delete_indirect_data_forwarding_tunnel_request(
sgwc_ue_t *sgwc_ue, ogs_gtp_xact_t *s11_xact,
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *recv_message)
{
sgwc_sess_t *sess = NULL;
uint8_t cause_value = 0;
ogs_assert(s11_xact);
ogs_debug("Delete Indirect Data Forwarding Tunnel Request");
/************************
* Check SGWC-UE Context
************************/
cause_value = OGS_GTP2_CAUSE_REQUEST_ACCEPTED;
if (!sgwc_ue) {
ogs_error("No Context");
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
}
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
ogs_gtp2_send_error_message(s11_xact,
sgwc_ue ? OGS_GTP2_TEID_PRESENCE : OGS_GTP2_TEID_NO_PRESENCE,
sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
OGS_GTP2_DELETE_INDIRECT_DATA_FORWARDING_TUNNEL_RESPONSE_TYPE,
cause_value);
return;
}
/********************
* Check ALL Context
********************/
ogs_assert(sgwc_ue);
ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
sgwc_ue->mme_s11_teid, sgwc_ue->sgw_s11_teid);
ogs_list_for_each(&sgwc_ue->sess_list, sess) {
ogs_assert(OGS_OK ==
sgwc_pfcp_send_session_modification_request(
sess, s11_xact, gtpbuf,
OGS_PFCP_MODIFY_INDIRECT| OGS_PFCP_MODIFY_REMOVE));
}
}
void sgwc_s11_handle_bearer_resource_command(
sgwc_ue_t *sgwc_ue, ogs_gtp_xact_t *s11_xact,
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
{
int rv;
ogs_pkbuf_t *pkbuf = NULL;
ogs_gtp2_bearer_resource_command_t *cmd = NULL;
uint8_t cause_value = 0;
ogs_gtp_xact_t *s5c_xact = NULL;
sgwc_sess_t *sess = NULL;
sgwc_bearer_t *bearer = NULL;
ogs_assert(s11_xact);
ogs_assert(message);
cmd = &message->bearer_resource_command;
ogs_assert(cmd);
ogs_debug("Bearer Resource Command");
/************************
* Check SGWC-UE Context
************************/
cause_value = OGS_GTP2_CAUSE_REQUEST_ACCEPTED;
if (!sgwc_ue) {
ogs_error("No Context");
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
} else {
if (cmd->linked_eps_bearer_id.presence == 0) {
ogs_error("No Linked EPS Bearer ID");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
uint8_t ebi = cmd->linked_eps_bearer_id.u8;
if (cmd->eps_bearer_id.presence)
ebi = cmd->eps_bearer_id.u8;
bearer = sgwc_bearer_find_by_ue_ebi(sgwc_ue, ebi);
if (!bearer) {
ogs_error("No Context for Linked EPS Bearer ID[%d:%d]",
cmd->linked_eps_bearer_id.u8, ebi);
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
}
}
}
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
ogs_gtp2_send_error_message(s11_xact,
sgwc_ue ? OGS_GTP2_TEID_PRESENCE : OGS_GTP2_TEID_NO_PRESENCE,
sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
OGS_GTP2_BEARER_RESOURCE_FAILURE_INDICATION_TYPE, cause_value);
return;
}
/*****************************************
* Check Mandatory/Conditional IE Missing
*****************************************/
ogs_assert(cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED);
if (cmd->procedure_transaction_id.presence == 0) {
ogs_error("No PTI");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (cmd->traffic_aggregate_description.presence == 0) {
ogs_error("No Traffic aggregate description(TAD)");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
ogs_gtp2_send_error_message(s11_xact,
sgwc_ue ? OGS_GTP2_TEID_PRESENCE : OGS_GTP2_TEID_NO_PRESENCE,
sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
OGS_GTP2_BEARER_RESOURCE_FAILURE_INDICATION_TYPE, cause_value);
return;
}
/********************
* Check ALL Context
********************/
ogs_assert(bearer);
sess = bearer->sess;
ogs_assert(sess);
ogs_assert(sess->gnode);
ogs_assert(sgwc_ue);
ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
sgwc_ue->mme_s11_teid, sgwc_ue->sgw_s11_teid);
ogs_debug(" SGW_S5C_TEID[0x%x] PGW_S5C_TEID[0x%x]",
sess->sgw_s5c_teid, sess->pgw_s5c_teid);
message->h.type = OGS_GTP2_BEARER_RESOURCE_COMMAND_TYPE;
message->h.teid_presence = OGS_GTP2_TEID_PRESENCE;
message->h.teid = sess->pgw_s5c_teid;
pkbuf = ogs_gtp2_build_msg(message);
if (!pkbuf) {
ogs_error("ogs_gtp2_build_msg() failed");
return;
}
s5c_xact = ogs_gtp_xact_local_create(
sess->gnode, &message->h, pkbuf, gtp_bearer_timeout, bearer);
if (!s5c_xact) {
ogs_error("ogs_gtp_xact_local_create() failed");
return;
}
s5c_xact->local_teid = sess->sgw_s5c_teid;
ogs_gtp_xact_associate(s11_xact, s5c_xact);
rv = ogs_gtp_xact_commit(s5c_xact);
ogs_expect(rv == OGS_OK);
}
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