acouzens
/
open5gs
1
0
Fork 1
Code Issues Pull Requests 1 Projects Releases Wiki Activity
open5gs/src/sgwc/s5c-handler.c

765 lines
24 KiB
C
Raw Blame History

/*
* 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 "gtp-path.h"
#include "pfcp-path.h"
#include "s5c-handler.h"
static void 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;
switch (type) {
case OGS_GTP2_UPDATE_BEARER_REQUEST_TYPE:
ogs_error("[%s] No Update Bearer Response", sgwc_ue->imsi_bcd);
break;
case OGS_GTP2_DELETE_BEARER_REQUEST_TYPE:
ogs_error("[%s] No Delete Bearer Response", sgwc_ue->imsi_bcd);
if (!sgwc_bearer_cycle(bearer)) {
ogs_warn("[%s] Bearer has already been removed", sgwc_ue->imsi_bcd);
break;
}
ogs_assert(OGS_OK ==
sgwc_pfcp_send_bearer_modification_request(
bearer, NULL, NULL, OGS_PFCP_MODIFY_REMOVE));
break;
default:
ogs_error("GTP Timeout : IMSI[%s] Message-Type[%d]",
sgwc_ue->imsi_bcd, type);
}
}
void sgwc_s5c_handle_create_session_response(
sgwc_sess_t *sess, ogs_gtp_xact_t *s5c_xact,
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
{
int rv;
ogs_gtp2_cause_t *cause = NULL;
ogs_gtp2_cause_t *bearer_cause = NULL;
uint8_t cause_value;
sgwc_ue_t *sgwc_ue = NULL;
sgwc_bearer_t *bearer = NULL;
sgwc_tunnel_t *ul_tunnel = NULL;
ogs_pfcp_far_t *far = NULL;
ogs_gtp2_f_teid_t *pgw_s5c_teid = NULL;
ogs_gtp2_f_teid_t *pgw_s5u_teid = NULL;
ogs_gtp2_create_session_response_t *rsp = NULL;
ogs_gtp_xact_t *s11_xact = NULL;
ogs_assert(s5c_xact);
s11_xact = s5c_xact->assoc_xact;
ogs_assert(s11_xact);
ogs_assert(gtpbuf);
ogs_assert(message);
rsp = &message->create_session_response;
ogs_assert(rsp);
ogs_debug("Create Session Response");
/***************************
* Check Session Context
***************************/
cause_value = OGS_GTP2_CAUSE_REQUEST_ACCEPTED;
if (!sess) {
ogs_warn("No Context in TEID");
sess = s5c_xact->data;
ogs_assert(sess);
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
} else {
sgwc_ue = sess->sgwc_ue;
ogs_assert(sgwc_ue);
if (rsp->bearer_contexts_created.eps_bearer_id.presence == 0) {
ogs_error("No EPS Bearer ID");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
} else {
bearer = sgwc_bearer_find_by_sess_ebi(sess,
rsp->bearer_contexts_created.eps_bearer_id.u8);
if (!bearer) {
ogs_error("No Context for EPS Bearer ID[%d]",
rsp->bearer_contexts_created.eps_bearer_id.u8);
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
}
}
}
rv = ogs_gtp_xact_commit(s5c_xact);
ogs_expect(rv == OGS_OK);
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
ogs_gtp_send_error_message(
s11_xact, sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
OGS_GTP2_CREATE_SESSION_RESPONSE_TYPE, cause_value);
return;
}
/***************************
* Check Manatory IE Missing
***************************/
ogs_assert(cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED);
if (rsp->bearer_contexts_created.cause.presence == 0) {
ogs_error("No EPS Bearer Cause");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (rsp->bearer_contexts_created.presence == 0) {
ogs_error("No Bearer");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (rsp->bearer_contexts_created.eps_bearer_id.presence == 0) {
ogs_error("No EPS Bearer ID");
ogs_assert_if_reached();
}
if (rsp->pgw_s5_s8__s2a_s2b_f_teid_for_pmip_based_interface_or_for_gtp_based_control_plane_interface.presence == 0) {
ogs_error("No GTP TEID");
cause_value = OGS_GTP2_CAUSE_CONDITIONAL_IE_MISSING;
}
if (rsp->bearer_contexts_created.s5_s8_u_sgw_f_teid.presence == 0) {
ogs_error("No GTP 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_created.cause.presence == 0) {
ogs_error("No Bearer Cause");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (rsp->pdn_address_allocation.presence) {
ogs_paa_t paa;
memcpy(&paa, rsp->pdn_address_allocation.data,
ogs_min(sizeof(paa), rsp->pdn_address_allocation.len));
if (paa.session_type == OGS_PDU_SESSION_TYPE_IPV4) {
/* Nothing */
} else if (paa.session_type == OGS_PDU_SESSION_TYPE_IPV6) {
/* Nothing */
} else if (paa.session_type == OGS_PDU_SESSION_TYPE_IPV4V6) {
/* Nothing */
} else {
ogs_error("Unknown PDN Type %u", paa.session_type);
cause_value = OGS_GTP2_CAUSE_CONDITIONAL_IE_MISSING;
}
} else {
ogs_error("No PDN Address Allocation");
cause_value = OGS_GTP2_CAUSE_CONDITIONAL_IE_MISSING;
}
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
ogs_gtp_send_error_message(
s11_xact, sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
OGS_GTP2_CREATE_SESSION_RESPONSE_TYPE, cause_value);
return;
}
/***************************
* Check Cause Value
***************************/
ogs_assert(cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED);
bearer_cause = rsp->bearer_contexts_created.cause.data;
ogs_assert(bearer_cause);
cause_value = bearer_cause->value;
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
ogs_error("GTP Failed [Bearer-CAUSE:%d]", cause_value);
ogs_gtp_send_error_message(
s11_xact, sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
OGS_GTP2_CREATE_SESSION_RESPONSE_TYPE, cause_value);
return;
}
cause = rsp->cause.data;
ogs_assert(cause);
cause_value = cause->value;
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED &&
cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED_PARTIALLY &&
cause_value !=
OGS_GTP2_CAUSE_NEW_PDN_TYPE_DUE_TO_NETWORK_PREFERENCE &&
cause_value !=
OGS_GTP2_CAUSE_NEW_PDN_TYPE_DUE_TO_SINGLE_ADDRESS_BEARER_ONLY) {
ogs_error("GTP Failed [CAUSE:%d]", cause_value);
ogs_gtp_send_error_message(
s11_xact, sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
OGS_GTP2_CREATE_SESSION_RESPONSE_TYPE, cause_value);
return;
}
ogs_assert(bearer);
ul_tunnel = sgwc_ul_tunnel_in_bearer(bearer);
ogs_assert(ul_tunnel);
/* Receive Data Plane(UL) : PGW-S5U */
pgw_s5u_teid = rsp->bearer_contexts_created.s5_s8_u_sgw_f_teid.data;
ogs_assert(pgw_s5u_teid);
ul_tunnel->remote_teid = be32toh(pgw_s5u_teid->teid);
rv = ogs_gtp2_f_teid_to_ip(pgw_s5u_teid, &ul_tunnel->remote_ip);
if (rv != OGS_OK) {
ogs_gtp_send_error_message(
s11_xact, sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
OGS_GTP2_CREATE_SESSION_RESPONSE_TYPE,
OGS_GTP2_CAUSE_MANDATORY_IE_MISSING);
return;
}
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;
/* Receive Control Plane(UL) : PGW-S5C */
pgw_s5c_teid = rsp->pgw_s5_s8__s2a_s2b_f_teid_for_pmip_based_interface_or_for_gtp_based_control_plane_interface.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_debug(" SGW_S5C_TEID[0x%x] PGW_S5C_TEID[0x%x]",
sess->sgw_s5c_teid, sess->pgw_s5c_teid);
ogs_debug(" SGW_S5U_TEID[%d] PGW_S5U_TEID[%d]",
ul_tunnel->local_teid, ul_tunnel->remote_teid);
ogs_assert(OGS_OK ==
sgwc_pfcp_send_bearer_modification_request(
bearer, s11_xact, gtpbuf,
OGS_PFCP_MODIFY_UL_ONLY|OGS_PFCP_MODIFY_ACTIVATE));
}
void sgwc_s5c_handle_delete_session_response(
sgwc_sess_t *sess, ogs_gtp_xact_t *s5c_xact,
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
{
int rv;
uint8_t cause_value;
sgwc_ue_t *sgwc_ue = NULL;
ogs_gtp_xact_t *s11_xact = NULL;
ogs_gtp2_delete_session_response_t *rsp = NULL;
ogs_assert(s5c_xact);
s11_xact = s5c_xact->assoc_xact;
ogs_assert(s11_xact);
ogs_assert(message);
rsp = &message->delete_session_response;
ogs_assert(rsp);
ogs_debug("Delete Session Response");
cause_value = OGS_GTP2_CAUSE_REQUEST_ACCEPTED;
if (!sess) {
ogs_warn("No Context in TEID");
sess = s5c_xact->data;
ogs_assert(sess);
}
rv = ogs_gtp_xact_commit(s5c_xact);
ogs_expect(rv == OGS_OK);
sgwc_ue = sess->sgwc_ue;
ogs_assert(sgwc_ue);
if (rsp->cause.presence) {
ogs_gtp2_cause_t *cause = rsp->cause.data;
ogs_assert(cause);
cause_value = cause->value;
} else {
ogs_error("No Cause");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
ogs_warn("GTP Failed [CAUSE:%d]", cause_value);
}
/* Remove a pgw session */
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);
/*
* 1. MME sends Delete Session Request to SGW/SMF.
* 2. SMF sends Delete Session Response to SGW/MME.
*/
ogs_assert(OGS_OK ==
sgwc_pfcp_send_session_deletion_request(sess, s11_xact, gtpbuf));
}
void sgwc_s5c_handle_modify_bearer_response(
sgwc_sess_t *sess, ogs_gtp_xact_t *s5c_xact,
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
{
int rv;
uint8_t cause_value;
sgwc_ue_t *sgwc_ue = NULL;
ogs_pkbuf_t *pkbuf = NULL;
ogs_gtp_xact_t *s11_xact = NULL;
ogs_gtp2_modify_bearer_response_t *rsp = NULL;
ogs_assert(s5c_xact);
s11_xact = s5c_xact->assoc_xact;
ogs_assert(s11_xact);
ogs_assert(message);
rsp = &message->modify_bearer_response;
ogs_assert(rsp);
ogs_debug("Modify Bearer Response");
cause_value = OGS_GTP2_CAUSE_REQUEST_ACCEPTED;
if (!sess) {
ogs_warn("No Context in TEID");
sess = s5c_xact->data;
ogs_assert(sess);
}
rv = ogs_gtp_xact_commit(s5c_xact);
ogs_expect(rv == OGS_OK);
sgwc_ue = sess->sgwc_ue;
ogs_assert(sgwc_ue);
if (rsp->cause.presence) {
ogs_gtp2_cause_t *cause = rsp->cause.data;
ogs_assert(cause);
cause_value = cause->value;
} else {
ogs_error("No Cause");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
ogs_gtp_send_error_message(
s11_xact, sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
OGS_GTP2_MODIFY_BEARER_RESPONSE_TYPE, cause_value);
return;
}
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_MODIFY_BEARER_RESPONSE_TYPE;
message->h.teid = sgwc_ue->mme_s11_teid;
pkbuf = ogs_gtp2_build_msg(message);
ogs_expect_or_return(pkbuf);
rv = ogs_gtp_xact_update_tx(s11_xact, &message->h, pkbuf);
ogs_expect_or_return(rv == OGS_OK);
rv = ogs_gtp_xact_commit(s11_xact);
ogs_expect(rv == OGS_OK);
}
void sgwc_s5c_handle_create_bearer_request(
sgwc_sess_t *sess, ogs_gtp_xact_t *s5c_xact,
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
{
int rv;
uint8_t cause_value = 0;
sgwc_ue_t *sgwc_ue = NULL;
sgwc_bearer_t *bearer = NULL;
sgwc_tunnel_t *ul_tunnel = NULL;
ogs_pfcp_far_t *far = NULL;
ogs_gtp2_create_bearer_request_t *req = NULL;
ogs_gtp2_f_teid_t *pgw_s5u_teid = NULL;
ogs_assert(s5c_xact);
ogs_assert(message);
req = &message->create_bearer_request;
ogs_assert(req);
ogs_debug("Create Bearer Request");
cause_value = OGS_GTP2_CAUSE_REQUEST_ACCEPTED;
if (req->linked_eps_bearer_id.presence == 0) {
ogs_error("No Linked EBI");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (req->bearer_contexts.presence == 0) {
ogs_error("No Bearer");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (req->bearer_contexts.eps_bearer_id.presence == 0) {
ogs_error("No EPS Bearer ID");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (req->bearer_contexts.s4_u_sgsn_f_teid.presence == 0) {
ogs_error("No GTP TEID");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (!sess) {
ogs_warn("No Context");
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
}
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
ogs_gtp_send_error_message(s5c_xact, sess ? sess->pgw_s5c_teid : 0,
OGS_GTP2_CREATE_BEARER_RESPONSE_TYPE, cause_value);
return;
}
sgwc_ue = sess->sgwc_ue;
ogs_assert(sgwc_ue);
bearer = sgwc_bearer_add(sess);
ogs_assert(bearer);
ul_tunnel = sgwc_ul_tunnel_in_bearer(bearer);
ogs_assert(ul_tunnel);
/* Receive Data Plane(UL) : PGW-S5U */
pgw_s5u_teid = req->bearer_contexts.s4_u_sgsn_f_teid.data;
ogs_assert(pgw_s5u_teid);
ul_tunnel->remote_teid = be32toh(pgw_s5u_teid->teid);
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_debug(" SGW_S5U_TEID[%d] PGW_S5U_TEID[%d]",
ul_tunnel->local_teid, ul_tunnel->remote_teid);
rv = ogs_gtp2_f_teid_to_ip(pgw_s5u_teid, &ul_tunnel->remote_ip);
if (rv != OGS_OK) {
ogs_gtp_send_error_message(s5c_xact, sess ? sess->pgw_s5c_teid : 0,
OGS_GTP2_CREATE_BEARER_RESPONSE_TYPE,
OGS_GTP2_CAUSE_MANDATORY_IE_MISSING);
return;
}
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;
ogs_assert(OGS_OK ==
sgwc_pfcp_send_bearer_modification_request(
bearer, s5c_xact, gtpbuf,
OGS_PFCP_MODIFY_UL_ONLY|OGS_PFCP_MODIFY_CREATE));
}
void sgwc_s5c_handle_update_bearer_request(
sgwc_sess_t *sess, ogs_gtp_xact_t *s5c_xact,
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
{
int rv;
uint8_t cause_value = 0;
ogs_gtp_xact_t *s11_xact = NULL;
ogs_gtp2_update_bearer_request_t *req = NULL;
ogs_pkbuf_t *pkbuf = NULL;
sgwc_ue_t *sgwc_ue = NULL;
sgwc_bearer_t *bearer = NULL;
ogs_assert(s5c_xact);
ogs_assert(message);
req = &message->update_bearer_request;
ogs_assert(req);
ogs_debug("Update Bearer Request");
cause_value = OGS_GTP2_CAUSE_REQUEST_ACCEPTED;
if (req->bearer_contexts.presence == 0) {
ogs_error("No Bearer");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (req->bearer_contexts.eps_bearer_id.presence == 0) {
ogs_error("No EPS Bearer ID");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
if (!sess) {
ogs_warn("No Context");
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
}
if (cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
bearer = sgwc_bearer_find_by_sess_ebi(
sess, req->bearer_contexts.eps_bearer_id.u8);
if (!bearer)
ogs_error("No Context for EPS Bearer ID[%d]",
req->bearer_contexts.eps_bearer_id.u8);
}
if (!bearer) {
ogs_warn("No Context");
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
}
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
ogs_gtp_send_error_message(s5c_xact, sess ? sess->pgw_s5c_teid : 0,
OGS_GTP2_UPDATE_BEARER_RESPONSE_TYPE, cause_value);
return;
}
ogs_assert(sess);
ogs_assert(bearer);
sgwc_ue = sess->sgwc_ue;
ogs_assert(sgwc_ue);
ogs_assert(sgwc_ue->gnode);
ogs_debug(" EBI[%d]", bearer->ebi);
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_REQUEST_TYPE;
message->h.teid = sgwc_ue->mme_s11_teid;
pkbuf = ogs_gtp2_build_msg(message);
ogs_expect_or_return(pkbuf);
s11_xact = s5c_xact->assoc_xact;
if (!s11_xact) {
s11_xact = ogs_gtp_xact_local_create(
sgwc_ue->gnode, &message->h, pkbuf, bearer_timeout, bearer);
ogs_expect_or_return(s11_xact);
ogs_gtp_xact_associate(s5c_xact, s11_xact);
} else {
rv = ogs_gtp_xact_update_tx(s11_xact, &message->h, pkbuf);
ogs_expect_or_return(rv == OGS_OK);
}
rv = ogs_gtp_xact_commit(s11_xact);
ogs_expect(rv == OGS_OK);
ogs_debug("Update Bearer Request : SGW <-- PGW");
}
void sgwc_s5c_handle_delete_bearer_request(
sgwc_sess_t *sess, ogs_gtp_xact_t *s5c_xact,
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
{
int rv;
uint8_t cause_value = 0;
ogs_gtp_xact_t *s11_xact = NULL;
ogs_gtp2_delete_bearer_request_t *req = NULL;
ogs_pkbuf_t *pkbuf = NULL;
sgwc_ue_t *sgwc_ue = NULL;
sgwc_bearer_t *bearer = NULL;
ogs_assert(s5c_xact);
ogs_assert(message);
req = &message->delete_bearer_request;
ogs_assert(req);
ogs_debug("Delete Bearer Request");
cause_value = OGS_GTP2_CAUSE_REQUEST_ACCEPTED;
if (req->linked_eps_bearer_id.presence == 0 &&
req->eps_bearer_ids.presence == 0) {
ogs_error("No Linked EBI or EPS Bearer ID");
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
}
if (!sess) {
ogs_warn("No Context");
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
}
if (cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
uint8_t ebi;
if (req->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.
*/
ebi = req->linked_eps_bearer_id.u8;
} else if (req->eps_bearer_ids.presence) {
/*
* << 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.
*/
ebi = req->eps_bearer_ids.u8;
} else
ogs_assert_if_reached();
bearer = sgwc_bearer_find_by_sess_ebi(sess, ebi);
if (!bearer)
ogs_error("No Context for EPS Bearer ID[%d]", ebi);
}
if (!bearer) {
ogs_warn("No Context");
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
}
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
ogs_gtp_send_error_message(s5c_xact, sess ? sess->pgw_s5c_teid : 0,
OGS_GTP2_DELETE_BEARER_RESPONSE_TYPE, cause_value);
return;
}
ogs_assert(sess);
ogs_assert(bearer);
sgwc_ue = sess->sgwc_ue;
ogs_assert(sgwc_ue);
ogs_assert(sgwc_ue->gnode);
ogs_debug(" EBI[%d]", bearer->ebi);
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_DELETE_BEARER_REQUEST_TYPE;
message->h.teid = sgwc_ue->mme_s11_teid;
pkbuf = ogs_gtp2_build_msg(message);
ogs_expect_or_return(pkbuf);
s11_xact = s5c_xact->assoc_xact;
if (!s11_xact) {
/*
* 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.
*
* OR
*
* 1. SMF sends Delete Bearer Request(DEDICATED BEARER) to SGW/MME.
* 2. MME sends Delete Bearer Response(DEDICATED BEARER) to SGW/SMF.
*/
s11_xact = ogs_gtp_xact_local_create(
sgwc_ue->gnode, &message->h, pkbuf, bearer_timeout, bearer);
ogs_expect_or_return(s11_xact);
ogs_gtp_xact_associate(s5c_xact, s11_xact);
} else {
/*
* 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.
*/
rv = ogs_gtp_xact_update_tx(s11_xact, &message->h, pkbuf);
ogs_expect_or_return(rv == OGS_OK);
}
rv = ogs_gtp_xact_commit(s11_xact);
ogs_expect(rv == OGS_OK);
}
void sgwc_s5c_handle_bearer_resource_failure_indication(
sgwc_sess_t *sess, ogs_gtp_xact_t *s5c_xact,
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
{
uint8_t cause_value = 0;
ogs_gtp_xact_t *s11_xact = NULL;
ogs_gtp2_bearer_resource_failure_indication_t *ind = NULL;
sgwc_ue_t *sgwc_ue = NULL;
ogs_assert(s5c_xact);
s11_xact = s5c_xact->assoc_xact;
ogs_assert(s11_xact);
ogs_assert(message);
ind = &message->bearer_resource_failure_indication;
ogs_assert(ind);
ogs_debug("Bearer Resource Failure Indication");
if (!sess) {
ogs_warn("No Context");
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
} else {
sgwc_ue = sess->sgwc_ue;
ogs_assert(sgwc_ue);
}
if (ind->cause.presence) {
ogs_gtp2_cause_t *cause = ind->cause.data;
ogs_assert(cause);
cause_value = cause->value;
} else {
ogs_error("No Cause");
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
}
ogs_gtp_send_error_message(s11_xact, sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
OGS_GTP2_BEARER_RESOURCE_FAILURE_INDICATION_TYPE, cause_value);
}
Reference in New Issue View Git Blame Copy Permalink