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open5gs/src/smf/n4-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 "context.h"
#include "n4-build.h"
ogs_pkbuf_t *smf_n4_build_session_establishment_request(
uint8_t type, smf_sess_t *sess, ogs_pfcp_xact_t *xact)
{
ogs_pfcp_message_t *pfcp_message = NULL;
ogs_pfcp_session_establishment_request_t *req = NULL;
ogs_pkbuf_t *pkbuf = NULL;
ogs_pfcp_pdr_t *pdr = NULL;
ogs_pfcp_far_t *far = NULL;
ogs_pfcp_urr_t *urr = NULL;
ogs_pfcp_qer_t *qer = NULL;
int i, rv;
ogs_pfcp_node_id_t node_id;
ogs_pfcp_f_seid_t f_seid;
char apn_dnn[OGS_MAX_DNN_LEN+1];
int len;
smf_ue_t *smf_ue = NULL;
ogs_pfcp_user_id_t user_id;
char user_id_buf[sizeof(ogs_pfcp_user_id_t)];
ogs_debug("Session Establishment Request");
ogs_assert(sess);
smf_ue = sess->smf_ue;
ogs_assert(smf_ue);
ogs_assert(xact);
pfcp_message = ogs_calloc(1, sizeof(*pfcp_message));
if (!pfcp_message) {
ogs_error("ogs_calloc() failed");
return NULL;
}
req = &pfcp_message->pfcp_session_establishment_request;
/* Node ID */
rv = ogs_pfcp_sockaddr_to_node_id(&node_id, &len);
if (rv != OGS_OK) {
ogs_error("ogs_pfcp_sockaddr_to_node_id() failed");
ogs_free(pfcp_message);
return NULL;
}
req->node_id.presence = 1;
req->node_id.data = &node_id;
req->node_id.len = len;
/* F-SEID */
rv = ogs_pfcp_sockaddr_to_f_seid(&f_seid, &len);
if (rv != OGS_OK) {
ogs_error("ogs_pfcp_sockaddr_to_f_seid() failed");
ogs_free(pfcp_message);
return NULL;
}
f_seid.seid = htobe64(sess->smf_n4_seid);
req->cp_f_seid.presence = 1;
req->cp_f_seid.data = &f_seid;
req->cp_f_seid.len = len;
ogs_pfcp_pdrbuf_init();
/* Create PDR */
i = 0;
ogs_list_for_each(&sess->pfcp.pdr_list, pdr) {
ogs_pfcp_build_create_pdr(&req->create_pdr[i], i, pdr);
i++;
}
/* Create FAR */
i = 0;
ogs_list_for_each(&sess->pfcp.far_list, far) {
ogs_pfcp_build_create_far(&req->create_far[i], i, far);
i++;
}
/* Create URR */
i = 0;
ogs_list_for_each(&sess->pfcp.urr_list, urr) {
ogs_pfcp_build_create_urr(&req->create_urr[i], i, urr);
i++;
}
/* Create QER */
i = 0;
ogs_list_for_each(&sess->pfcp.qer_list, qer) {
ogs_pfcp_build_create_qer(&req->create_qer[i], i, qer);
i++;
}
/* Create BAR */
if (sess->pfcp.bar) {
ogs_pfcp_build_create_bar(&req->create_bar, sess->pfcp.bar);
}
/* PDN Type */
req->pdn_type.presence = 1;
req->pdn_type.u8 = sess->session.session_type;
/* User ID */
memset(&user_id, 0, sizeof(ogs_pfcp_user_id_t));
if (smf_ue->imsi_len) {
user_id.imsif = 1;
user_id.imsi_len = smf_ue->imsi_len;
ogs_assert(smf_ue->imsi_len <= OGS_MAX_IMSI_LEN);
memcpy(user_id.imsi, smf_ue->imsi, smf_ue->imsi_len);
}
if (smf_ue->imeisv_len) {
user_id.imeif = 1;
user_id.imeisv_len = smf_ue->imeisv_len;
ogs_assert(smf_ue->imeisv_len <= OGS_MAX_IMEISV_LEN);
memcpy(user_id.imeisv, smf_ue->imeisv, smf_ue->imeisv_len);
}
if (smf_ue->msisdn_len) {
user_id.msisdnf = 1;
user_id.msisdn_len = smf_ue->msisdn_len;
ogs_assert(smf_ue->msisdn_len <= OGS_MAX_MSISDN_LEN);
memcpy(user_id.msisdn, smf_ue->msisdn, smf_ue->msisdn_len);
}
if (user_id.flags) {
ogs_pfcp_build_user_id(
&req->user_id, &user_id, user_id_buf, sizeof(user_id_buf));
req->user_id.presence = 1;
}
/* APN/DNN */
len = ogs_fqdn_build(apn_dnn, sess->session.name, strlen(sess->session.name));
req->apn_dnn.presence = 1;
req->apn_dnn.len = len;
req->apn_dnn.data = apn_dnn;
/* S-NSSAI */
if (!sess->epc) {
req->s_nssai.presence = 1;
req->s_nssai.len = 4;
req->s_nssai.data = &sess->s_nssai;
}
/* Restoration Indication */
if (xact->create_flags & OGS_PFCP_CREATE_RESTORATION_INDICATION) {
ogs_pfcp_sereq_flags_t sereq_flags;
sereq_flags.value = 0;
sereq_flags.restoration_indication = 1;
req->pfcpsereq_flags.presence = 1;
req->pfcpsereq_flags.u8 = sereq_flags.value;
}
pfcp_message->h.type = type;
pkbuf = ogs_pfcp_build_msg(pfcp_message);
ogs_expect(pkbuf);
ogs_pfcp_pdrbuf_clear();
ogs_free(pfcp_message);
return pkbuf;
}
ogs_pkbuf_t *smf_n4_build_pdr_to_modify_list(
uint8_t type, smf_sess_t *sess, ogs_pfcp_xact_t *xact)
{
ogs_pfcp_pdr_t *pdr = NULL;
ogs_pfcp_urr_t *urr = NULL;
int i;
ogs_pfcp_message_t *pfcp_message = NULL;
ogs_pfcp_session_modification_request_t *req = NULL;
ogs_pkbuf_t *pkbuf = NULL;
int num_of_remove_pdr = 0;
int num_of_remove_far = 0;
int num_of_create_pdr = 0;
int num_of_create_far = 0;
int num_of_update_far = 0;
uint64_t modify_flags = 0;
ogs_debug("Session Modification Request");
ogs_assert(sess);
ogs_assert(xact);
modify_flags = xact->modify_flags;
ogs_assert(modify_flags);
pfcp_message = ogs_calloc(1, sizeof(*pfcp_message));
if (!pfcp_message) {
ogs_error("ogs_calloc() failed");
return NULL;
}
req = &pfcp_message->pfcp_session_modification_request;
if (modify_flags & OGS_PFCP_MODIFY_CREATE) {
ogs_pfcp_pdrbuf_init();
}
ogs_list_for_each_entry(&sess->pdr_to_modify_list, pdr, to_modify_node) {
ogs_pfcp_far_t *far = pdr->far;
ogs_assert(far);
if (((modify_flags &
(OGS_PFCP_MODIFY_DL_ONLY|
OGS_PFCP_MODIFY_UL_ONLY|
OGS_PFCP_MODIFY_INDIRECT)) == 0) ||
((modify_flags & OGS_PFCP_MODIFY_DL_ONLY) &&
(pdr->src_if == OGS_PFCP_INTERFACE_CORE) &&
(far->dst_if == OGS_PFCP_INTERFACE_ACCESS)) ||
((modify_flags & OGS_PFCP_MODIFY_UL_ONLY) &&
(pdr->src_if == OGS_PFCP_INTERFACE_ACCESS) &&
(far->dst_if == OGS_PFCP_INTERFACE_CORE)) ||
((modify_flags & OGS_PFCP_MODIFY_INDIRECT) &&
(pdr->src_if == OGS_PFCP_INTERFACE_ACCESS) &&
(far->dst_if == OGS_PFCP_INTERFACE_ACCESS))) {
if (modify_flags & OGS_PFCP_MODIFY_REMOVE) {
ogs_pfcp_tlv_remove_pdr_t *remove_pdr = NULL;
ogs_pfcp_tlv_remove_far_t *remove_far = NULL;
remove_pdr = &req->remove_pdr[num_of_remove_pdr];
remove_pdr->presence = 1;
remove_pdr->pdr_id.presence = 1;
remove_pdr->pdr_id.u16 = pdr->id;
num_of_remove_pdr++;
remove_far = &req->remove_far[num_of_remove_far];
remove_far->presence = 1;
remove_far->far_id.presence = 1;
remove_far->far_id.u32 = far->id;
num_of_remove_far++;
} else if (modify_flags & OGS_PFCP_MODIFY_CREATE) {
ogs_pfcp_build_create_pdr(
&req->create_pdr[num_of_create_pdr],
num_of_create_pdr, pdr);
num_of_create_pdr++;
ogs_list_add(&xact->pdr_to_create_list, &pdr->to_create_node);
ogs_pfcp_build_create_far(
&req->create_far[num_of_create_far],
num_of_create_far, far);
num_of_create_far++;
} else if (modify_flags & OGS_PFCP_MODIFY_ACTIVATE) {
if (far->apply_action & OGS_PFCP_APPLY_ACTION_FORW) {
if (modify_flags & OGS_PFCP_MODIFY_END_MARKER) {
far->smreq_flags.send_end_marker_packets = 1;
}
ogs_pfcp_build_update_far_activate(
&req->update_far[num_of_update_far],
num_of_update_far, far);
/* Clear all FAR flags */
far->smreq_flags.value = 0;
num_of_update_far++;
}
} else if (modify_flags & OGS_PFCP_MODIFY_DEACTIVATE) {
ogs_pfcp_build_update_far_deactivate(
&req->update_far[num_of_update_far],
num_of_update_far, far);
num_of_update_far++;
} else if (modify_flags == 0) {
ogs_fatal("Invalid modify_flags = %lld",
(long long)modify_flags);
ogs_assert_if_reached();
}
}
}
/* Update URR */
i = 0;
ogs_list_for_each(&sess->pfcp.urr_list, urr) {
ogs_pfcp_build_update_urr(&req->update_urr[i], i, urr, modify_flags);
i++;
}
pfcp_message->h.type = type;
pkbuf = ogs_pfcp_build_msg(pfcp_message);
ogs_expect(pkbuf);
if (modify_flags & OGS_PFCP_MODIFY_CREATE) {
ogs_pfcp_pdrbuf_clear();
}
ogs_free(pfcp_message);
return pkbuf;
}
ogs_pkbuf_t *smf_n4_build_qos_flow_to_modify_list(
uint8_t type, smf_sess_t *sess, ogs_pfcp_xact_t *xact)
{
ogs_pfcp_message_t *pfcp_message = NULL;
ogs_pfcp_session_modification_request_t *req = NULL;
ogs_pkbuf_t *pkbuf = NULL;
smf_bearer_t *qos_flow = NULL;
int num_of_remove_pdr = 0;
int num_of_remove_far = 0;
int num_of_remove_qer = 0;
int num_of_remove_urr = 0;
int num_of_create_pdr = 0;
int num_of_create_far = 0;
int num_of_create_qer = 0;
int num_of_create_urr = 0;
int num_of_update_pdr = 0;
int num_of_update_far = 0;
int num_of_update_qer = 0;
int num_of_update_urr = 0;
uint64_t modify_flags = 0;
ogs_debug("Bearer Modification Request");
ogs_assert(sess);
ogs_assert(xact);
modify_flags = xact->modify_flags;
ogs_assert(modify_flags);
pfcp_message = ogs_calloc(1, sizeof(*pfcp_message));
if (!pfcp_message) {
ogs_error("ogs_calloc() failed");
return NULL;
}
req = &pfcp_message->pfcp_session_modification_request;
if (modify_flags &
(OGS_PFCP_MODIFY_CREATE|
OGS_PFCP_MODIFY_TFT_NEW|OGS_PFCP_MODIFY_TFT_ADD|
OGS_PFCP_MODIFY_TFT_REPLACE|OGS_PFCP_MODIFY_TFT_DELETE|
OGS_PFCP_MODIFY_EPC_TFT_UPDATE)) {
ogs_pfcp_pdrbuf_init();
}
ogs_list_for_each_entry(
&sess->qos_flow_to_modify_list, qos_flow, to_modify_node) {
if (modify_flags & OGS_PFCP_MODIFY_REMOVE) {
/* Remove PDR */
if (qos_flow->dl_pdr) {
ogs_pfcp_tlv_remove_pdr_t *message =
&req->remove_pdr[num_of_remove_pdr];
message->presence = 1;
message->pdr_id.presence = 1;
message->pdr_id.u16 = qos_flow->dl_pdr->id;
num_of_remove_pdr++;
}
if (qos_flow->ul_pdr) {
ogs_pfcp_tlv_remove_pdr_t *message =
&req->remove_pdr[num_of_remove_pdr];
message->presence = 1;
message->pdr_id.presence = 1;
message->pdr_id.u16 = qos_flow->ul_pdr->id;
num_of_remove_pdr++;
}
/* Remove FAR */
if (qos_flow->dl_far) {
ogs_pfcp_tlv_remove_far_t *message =
&req->remove_far[num_of_remove_far];
message->presence = 1;
message->far_id.presence = 1;
message->far_id.u32 = qos_flow->dl_far->id;
num_of_remove_far++;
}
if (qos_flow->ul_far) {
ogs_pfcp_tlv_remove_far_t *message =
&req->remove_far[num_of_remove_far];
message->presence = 1;
message->far_id.presence = 1;
message->far_id.u32 = qos_flow->ul_far->id;
num_of_remove_far++;
}
/* Remove QER */
if (qos_flow->qer) {
ogs_pfcp_tlv_remove_qer_t *message =
&req->remove_qer[num_of_remove_qer];
message->presence = 1;
message->qer_id.presence = 1;
message->qer_id.u32 = qos_flow->qer->id;
num_of_remove_qer++;
}
/* Remove URR */
if (qos_flow->urr) {
ogs_pfcp_tlv_remove_urr_t *message =
&req->remove_urr[num_of_remove_urr];
message->presence = 1;
message->urr_id.presence = 1;
message->urr_id.u32 = qos_flow->urr->id;
num_of_remove_urr++;
}
} else {
if (modify_flags & OGS_PFCP_MODIFY_CREATE) {
/* Create PDR */
if (qos_flow->dl_pdr) {
ogs_pfcp_build_create_pdr(
&req->create_pdr[num_of_create_pdr],
num_of_create_pdr, qos_flow->dl_pdr);
num_of_create_pdr++;
ogs_list_add(&xact->pdr_to_create_list,
&qos_flow->dl_pdr->to_create_node);
}
if (qos_flow->ul_pdr) {
ogs_pfcp_build_create_pdr(
&req->create_pdr[num_of_create_pdr],
num_of_create_pdr, qos_flow->ul_pdr);
num_of_create_pdr++;
ogs_list_add(&xact->pdr_to_create_list,
&qos_flow->ul_pdr->to_create_node);
}
/* Create FAR */
if (qos_flow->dl_far) {
ogs_pfcp_build_create_far(
&req->create_far[num_of_create_far],
num_of_create_far, qos_flow->dl_far);
num_of_create_far++;
}
if (qos_flow->ul_far) {
ogs_pfcp_build_create_far(
&req->create_far[num_of_create_far],
num_of_create_far, qos_flow->ul_far);
num_of_create_far++;
}
/* Create QER */
if (qos_flow->qer) {
ogs_pfcp_build_create_qer(
&req->create_qer[num_of_create_qer],
num_of_create_qer, qos_flow->qer);
num_of_create_qer++;
}
/* Create URR */
if (qos_flow->urr) {
ogs_pfcp_build_create_urr(
&req->create_urr[num_of_create_urr],
num_of_create_urr, qos_flow->urr);
num_of_create_urr++;
}
}
if (modify_flags &
(OGS_PFCP_MODIFY_TFT_NEW|OGS_PFCP_MODIFY_TFT_ADD|
OGS_PFCP_MODIFY_TFT_REPLACE|OGS_PFCP_MODIFY_TFT_DELETE|
OGS_PFCP_MODIFY_EPC_TFT_UPDATE)) {
/* Update PDR */
if (qos_flow->dl_pdr) {
ogs_pfcp_build_update_pdr(
&req->update_pdr[num_of_update_pdr],
num_of_update_pdr, qos_flow->dl_pdr);
num_of_update_pdr++;
}
if (qos_flow->ul_pdr) {
ogs_pfcp_build_update_pdr(
&req->update_pdr[num_of_update_pdr],
num_of_update_pdr, qos_flow->ul_pdr);
num_of_update_pdr++;
}
if (qos_flow->urr) {
ogs_pfcp_build_update_urr(
&req->update_urr[num_of_update_urr],
num_of_update_urr, qos_flow->urr, modify_flags);
num_of_update_urr++;
}
}
if (modify_flags & OGS_PFCP_MODIFY_ACTIVATE) {
/* Update FAR - Only DL */
if (qos_flow->dl_far) {
if (qos_flow->dl_far->apply_action &
OGS_PFCP_APPLY_ACTION_FORW) {
if (modify_flags & OGS_PFCP_MODIFY_END_MARKER) {
qos_flow->dl_far->
smreq_flags.send_end_marker_packets = 1;
}
ogs_pfcp_build_update_far_activate(
&req->update_far[num_of_update_far],
num_of_update_far, qos_flow->dl_far);
num_of_update_far++;
/* Clear all FAR flags */
qos_flow->dl_far->smreq_flags.value = 0;
}
}
} else if (modify_flags & OGS_PFCP_MODIFY_DEACTIVATE) {
if (qos_flow->dl_far) {
ogs_pfcp_build_update_far_deactivate(
&req->update_far[num_of_update_far],
num_of_update_far, qos_flow->dl_far);
num_of_update_far++;
}
}
if (modify_flags &
(OGS_PFCP_MODIFY_QOS_MODIFY|
OGS_PFCP_MODIFY_EPC_QOS_UPDATE)) {
/* Update QER */
if (qos_flow->qer) {
ogs_pfcp_build_update_qer(
&req->update_qer[num_of_update_qer],
num_of_update_qer, qos_flow->qer);
num_of_update_qer++;
}
}
}
}
pfcp_message->h.type = type;
pkbuf = ogs_pfcp_build_msg(pfcp_message);
ogs_expect(pkbuf);
if (modify_flags &
(OGS_PFCP_MODIFY_CREATE|
OGS_PFCP_MODIFY_TFT_NEW|OGS_PFCP_MODIFY_TFT_ADD|
OGS_PFCP_MODIFY_TFT_REPLACE|OGS_PFCP_MODIFY_TFT_DELETE|
OGS_PFCP_MODIFY_EPC_TFT_UPDATE)) {
ogs_pfcp_pdrbuf_clear();
}
ogs_free(pfcp_message);
return pkbuf;
}
ogs_pkbuf_t *smf_n4_build_session_deletion_request(
uint8_t type, smf_sess_t *sess)
{
ogs_pfcp_message_t *pfcp_message = NULL;
ogs_pkbuf_t *pkbuf = NULL;
ogs_debug("Session Deletion Request");
ogs_assert(sess);
pfcp_message = ogs_calloc(1, sizeof(*pfcp_message));
if (!pfcp_message) {
ogs_error("ogs_calloc() failed");
return NULL;
}
pfcp_message->h.type = type;
pkbuf = ogs_pfcp_build_msg(pfcp_message);
ogs_expect(pkbuf);
ogs_free(pfcp_message);
return pkbuf;
}
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