acouzens
/
open5gs
1
0
Fork 1
Code Issues Pull Requests 1 Projects Releases Wiki Activity
open5gs/src/upf/context.c

530 lines
18 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 "context.h"
#include "pfcp-path.h"
static upf_context_t self;
int __upf_log_domain;
static OGS_POOL(upf_sess_pool, upf_sess_t);
static int context_initialized = 0;
static void upf_sess_urr_acc_remove_all(upf_sess_t *sess);
void upf_context_init(void)
{
ogs_assert(context_initialized == 0);
/* Initialize UPF context */
memset(&self, 0, sizeof(upf_context_t));
ogs_log_install_domain(&__upf_log_domain, "upf", ogs_core()->log.level);
/* Setup UP Function Features */
ogs_pfcp_self()->up_function_features.ftup = 1;
ogs_pfcp_self()->up_function_features.empu = 1;
ogs_pfcp_self()->up_function_features.mnop = 1;
ogs_pfcp_self()->up_function_features_len = 3;
ogs_list_init(&self.sess_list);
ogs_pool_init(&upf_sess_pool, ogs_app()->pool.sess);
self.seid_hash = ogs_hash_make();
ogs_assert(self.seid_hash);
self.f_seid_hash = ogs_hash_make();
ogs_assert(self.f_seid_hash);
self.ipv4_hash = ogs_hash_make();
ogs_assert(self.ipv4_hash);
self.ipv6_hash = ogs_hash_make();
ogs_assert(self.ipv6_hash);
context_initialized = 1;
}
void upf_context_final(void)
{
ogs_assert(context_initialized == 1);
upf_sess_remove_all();
ogs_assert(self.seid_hash);
ogs_hash_destroy(self.seid_hash);
ogs_assert(self.f_seid_hash);
ogs_hash_destroy(self.f_seid_hash);
ogs_assert(self.ipv4_hash);
ogs_hash_destroy(self.ipv4_hash);
ogs_assert(self.ipv6_hash);
ogs_hash_destroy(self.ipv6_hash);
ogs_pool_final(&upf_sess_pool);
context_initialized = 0;
}
upf_context_t *upf_self(void)
{
return &self;
}
static int upf_context_prepare(void)
{
return OGS_OK;
}
static int upf_context_validation(void)
{
if (ogs_list_first(&ogs_gtp_self()->gtpu_list) == NULL) {
ogs_error("No upf.gtpu in '%s'", ogs_app()->file);
return OGS_ERROR;
}
if (ogs_list_first(&ogs_pfcp_self()->subnet_list) == NULL) {
ogs_error("No upf.subnet: in '%s'", ogs_app()->file);
return OGS_ERROR;
}
return OGS_OK;
}
int upf_context_parse_config(void)
{
int rv;
yaml_document_t *document = NULL;
ogs_yaml_iter_t root_iter;
document = ogs_app()->document;
ogs_assert(document);
rv = upf_context_prepare();
if (rv != OGS_OK) return rv;
ogs_yaml_iter_init(&root_iter, document);
while (ogs_yaml_iter_next(&root_iter)) {
const char *root_key = ogs_yaml_iter_key(&root_iter);
ogs_assert(root_key);
if (!strcmp(root_key, "upf")) {
ogs_yaml_iter_t upf_iter;
ogs_yaml_iter_recurse(&root_iter, &upf_iter);
while (ogs_yaml_iter_next(&upf_iter)) {
const char *upf_key = ogs_yaml_iter_key(&upf_iter);
ogs_assert(upf_key);
if (!strcmp(upf_key, "gtpu")) {
/* handle config in gtp library */
} else if (!strcmp(upf_key, "pfcp")) {
/* handle config in pfcp library */
} else if (!strcmp(upf_key, "subnet")) {
/* handle config in pfcp library */
} else
ogs_warn("unknown key `%s`", upf_key);
}
}
}
rv = upf_context_validation();
if (rv != OGS_OK) return rv;
return OGS_OK;
}
upf_sess_t *upf_sess_add(ogs_pfcp_f_seid_t *cp_f_seid)
{
upf_sess_t *sess = NULL;
ogs_assert(cp_f_seid);
ogs_pool_alloc(&upf_sess_pool, &sess);
ogs_assert(sess);
memset(sess, 0, sizeof *sess);
ogs_pfcp_pool_init(&sess->pfcp);
sess->index = ogs_pool_index(&upf_sess_pool, sess);
ogs_assert(sess->index > 0 && sess->index <= ogs_app()->pool.sess);
sess->upf_n4_seid = sess->index;
/* Since F-SEID is composed of ogs_ip_t and uint64-seid,
* all these values must be put into the structure-smf_n4_f_seid
* before creating hash */
sess->smf_n4_f_seid.seid = cp_f_seid->seid;
ogs_assert(OGS_OK ==
ogs_pfcp_f_seid_to_ip(cp_f_seid, &sess->smf_n4_f_seid.ip));
ogs_hash_set(self.f_seid_hash, &sess->smf_n4_f_seid,
sizeof(sess->smf_n4_f_seid), sess);
ogs_hash_set(self.seid_hash, &sess->smf_n4_f_seid.seid,
sizeof(sess->smf_n4_f_seid.seid), sess);
ogs_list_add(&self.sess_list, sess);
ogs_info("[Added] Number of UPF-Sessions is now %d",
ogs_list_count(&self.sess_list));
return sess;
}
int upf_sess_remove(upf_sess_t *sess)
{
ogs_assert(sess);
upf_sess_urr_acc_remove_all(sess);
ogs_list_remove(&self.sess_list, sess);
ogs_pfcp_sess_clear(&sess->pfcp);
ogs_hash_set(self.seid_hash, &sess->smf_n4_f_seid.seid,
sizeof(sess->smf_n4_f_seid.seid), NULL);
ogs_hash_set(self.f_seid_hash, &sess->smf_n4_f_seid,
sizeof(sess->smf_n4_f_seid), NULL);
if (sess->ipv4) {
ogs_hash_set(self.ipv4_hash, sess->ipv4->addr, OGS_IPV4_LEN, NULL);
ogs_pfcp_ue_ip_free(sess->ipv4);
}
if (sess->ipv6) {
ogs_hash_set(self.ipv6_hash,
sess->ipv6->addr, OGS_IPV6_DEFAULT_PREFIX_LEN >> 3, NULL);
ogs_pfcp_ue_ip_free(sess->ipv6);
}
ogs_pfcp_pool_final(&sess->pfcp);
ogs_pool_free(&upf_sess_pool, sess);
ogs_info("[Removed] Number of UPF-sessions is now %d",
ogs_list_count(&self.sess_list));
return OGS_OK;
}
void upf_sess_remove_all(void)
{
upf_sess_t *sess = NULL, *next = NULL;;
ogs_list_for_each_safe(&self.sess_list, next, sess) {
upf_sess_remove(sess);
}
}
upf_sess_t *upf_sess_find(uint32_t index)
{
return ogs_pool_find(&upf_sess_pool, index);
}
upf_sess_t *upf_sess_find_by_smf_n4_seid(uint64_t seid)
{
return (upf_sess_t *)ogs_hash_get(self.seid_hash, &seid, sizeof(seid));
}
upf_sess_t *upf_sess_find_by_smf_n4_f_seid(ogs_pfcp_f_seid_t *f_seid)
{
struct {
uint64_t seid;
ogs_ip_t ip;
} key;
ogs_assert(f_seid);
ogs_assert(OGS_OK == ogs_pfcp_f_seid_to_ip(f_seid, &key.ip));
key.seid = f_seid->seid;
return (upf_sess_t *)ogs_hash_get(self.f_seid_hash, &key, sizeof(key));
}
upf_sess_t *upf_sess_find_by_upf_n4_seid(uint64_t seid)
{
return upf_sess_find(seid);
}
upf_sess_t *upf_sess_find_by_ipv4(uint32_t addr)
{
ogs_assert(self.ipv4_hash);
return (upf_sess_t *)ogs_hash_get(self.ipv4_hash, &addr, OGS_IPV4_LEN);
}
upf_sess_t *upf_sess_find_by_ipv6(uint32_t *addr6)
{
ogs_assert(self.ipv6_hash);
ogs_assert(addr6);
return (upf_sess_t *)ogs_hash_get(
self.ipv6_hash, addr6, OGS_IPV6_DEFAULT_PREFIX_LEN >> 3);
}
upf_sess_t *upf_sess_add_by_message(ogs_pfcp_message_t *message)
{
upf_sess_t *sess = NULL;
ogs_pfcp_f_seid_t *f_seid = NULL;
ogs_pfcp_session_establishment_request_t *req =
&message->pfcp_session_establishment_request;;
f_seid = req->cp_f_seid.data;
if (req->cp_f_seid.presence == 0 || f_seid == NULL) {
ogs_error("No CP F-SEID");
return NULL;
}
f_seid->seid = be64toh(f_seid->seid);
sess = upf_sess_find_by_smf_n4_f_seid(f_seid);
if (!sess) {
sess = upf_sess_add(f_seid);
if (!sess) return NULL;
}
ogs_assert(sess);
return sess;
}
uint8_t upf_sess_set_ue_ip(upf_sess_t *sess,
uint8_t session_type, ogs_pfcp_pdr_t *pdr)
{
ogs_pfcp_ue_ip_addr_t *ue_ip = NULL;
char buf1[OGS_ADDRSTRLEN];
char buf2[OGS_ADDRSTRLEN];
uint8_t cause_value = OGS_PFCP_CAUSE_REQUEST_ACCEPTED;
ogs_assert(sess);
ogs_assert(session_type);
ogs_assert(pdr);
ogs_assert(pdr->ue_ip_addr_len);
ue_ip = &pdr->ue_ip_addr;
ogs_assert(ue_ip);
if (sess->ipv4) {
ogs_hash_set(self.ipv4_hash,
sess->ipv4->addr, OGS_IPV4_LEN, NULL);
ogs_pfcp_ue_ip_free(sess->ipv4);
}
if (sess->ipv6) {
ogs_hash_set(self.ipv6_hash,
sess->ipv6->addr, OGS_IPV6_DEFAULT_PREFIX_LEN >> 3, NULL);
ogs_pfcp_ue_ip_free(sess->ipv6);
}
/* Set PDN-Type and UE IP Address */
if (session_type == OGS_PDU_SESSION_TYPE_IPV4) {
if (ue_ip->ipv4 || pdr->dnn) {
sess->ipv4 = ogs_pfcp_ue_ip_alloc(&cause_value, AF_INET,
pdr->dnn, (uint8_t *)&(ue_ip->addr));
if (!sess->ipv4) {
ogs_error("ogs_pfcp_ue_ip_alloc() failed[%d]", cause_value);
ogs_assert(cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED);
return cause_value;
}
ogs_hash_set(self.ipv4_hash, sess->ipv4->addr, OGS_IPV4_LEN, sess);
} else {
ogs_warn("Cannot support PDN-Type[%d], [IPv4:%d IPv6:%d DNN:%s]",
session_type, ue_ip->ipv4, ue_ip->ipv6,
pdr->dnn ? pdr->dnn : "");
}
} else if (session_type == OGS_PDU_SESSION_TYPE_IPV6) {
if (ue_ip->ipv6 || pdr->dnn) {
sess->ipv6 = ogs_pfcp_ue_ip_alloc(&cause_value, AF_INET6,
pdr->dnn, ue_ip->addr6);
if (!sess->ipv6) {
ogs_error("ogs_pfcp_ue_ip_alloc() failed[%d]", cause_value);
ogs_assert(cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED);
return cause_value;
}
ogs_hash_set(self.ipv6_hash, sess->ipv6->addr,
OGS_IPV6_DEFAULT_PREFIX_LEN >> 3, sess);
} else {
ogs_warn("Cannot support PDN-Type[%d], [IPv4:%d IPv6:%d DNN:%s]",
session_type, ue_ip->ipv4, ue_ip->ipv6,
pdr->dnn ? pdr->dnn : "");
}
} else if (session_type == OGS_PDU_SESSION_TYPE_IPV4V6) {
if (ue_ip->ipv4 || pdr->dnn) {
sess->ipv4 = ogs_pfcp_ue_ip_alloc(&cause_value, AF_INET,
pdr->dnn, (uint8_t *)&(ue_ip->both.addr));
if (!sess->ipv4) {
ogs_error("ogs_pfcp_ue_ip_alloc() failed[%d]", cause_value);
ogs_assert(cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED);
return cause_value;
}
ogs_hash_set(self.ipv4_hash, sess->ipv4->addr, OGS_IPV4_LEN, sess);
} else {
ogs_warn("Cannot support PDN-Type[%d], [IPv4:%d IPv6:%d DNN:%s]",
session_type, ue_ip->ipv4, ue_ip->ipv6,
pdr->dnn ? pdr->dnn : "");
}
if (ue_ip->ipv6 || pdr->dnn) {
sess->ipv6 = ogs_pfcp_ue_ip_alloc(&cause_value, AF_INET6,
pdr->dnn, ue_ip->both.addr6);
if (!sess->ipv6) {
ogs_error("ogs_pfcp_ue_ip_alloc() failed[%d]", cause_value);
ogs_assert(cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED);
if (sess->ipv4) {
ogs_hash_set(self.ipv4_hash,
sess->ipv4->addr, OGS_IPV4_LEN, NULL);
ogs_pfcp_ue_ip_free(sess->ipv4);
sess->ipv4 = NULL;
}
return cause_value;
}
ogs_hash_set(self.ipv6_hash, sess->ipv6->addr,
OGS_IPV6_DEFAULT_PREFIX_LEN >> 3, sess);
} else {
ogs_warn("Cannot support PDN-Type[%d], [IPv4:%d IPv6:%d DNN:%s]",
session_type, ue_ip->ipv4, ue_ip->ipv6,
pdr->dnn ? pdr->dnn : "");
}
} else {
ogs_warn("Cannot support PDN-Type[%d], [IPv4:%d IPv6:%d DNN:%s]",
session_type, ue_ip->ipv4, ue_ip->ipv6,
pdr->dnn ? pdr->dnn : "");
}
ogs_info("UE F-SEID[CP:0x%lx UP:0x%lx] "
"APN[%s] PDN-Type[%d] IPv4[%s] IPv6[%s]",
(long)sess->upf_n4_seid, (long)sess->smf_n4_f_seid.seid,
pdr->dnn, session_type,
sess->ipv4 ? OGS_INET_NTOP(&sess->ipv4->addr, buf1) : "",
sess->ipv6 ? OGS_INET6_NTOP(&sess->ipv6->addr, buf2) : "");
return cause_value;
}
void upf_sess_urr_acc_add(upf_sess_t *sess, ogs_pfcp_urr_t *urr, size_t size, bool is_uplink)
{
upf_sess_urr_acc_t *urr_acc = &sess->urr_acc[urr->id];
/* Increment total & ul octets + pkts */
urr_acc->total_octets += size;
urr_acc->total_pkts++;
if (is_uplink) {
urr_acc->dl_octets += size;
urr_acc->dl_pkts++;
} else {
urr_acc->ul_octets += size;
urr_acc->ul_pkts++;
}
urr_acc->time_of_last_packet = ogs_time_now();
if (urr_acc->time_of_first_packet == 0)
urr_acc->time_of_first_packet = urr_acc->time_of_last_packet;
/* TODO: generate report if volume threshold/quota is reached, eg sess->urr_acc[urr->id].total_octets - sess->urr_acc[urr->id].last_report.total_octets > threshold */
}
/* report struct must be memzeroed before first use of this function.
* report->num_of_usage_report must be set by the caller */
void upf_sess_urr_acc_fill_usage_report(upf_sess_t *sess, const ogs_pfcp_urr_t *urr,
ogs_pfcp_user_plane_report_t *report, unsigned int idx)
{
upf_sess_urr_acc_t *urr_acc = &sess->urr_acc[urr->id];
ogs_time_t last_report_timestamp;
ogs_time_t now;
now = ogs_time_now(); /* we need UTC for start_time and end_time */
if (urr_acc->last_report.timestamp)
last_report_timestamp = urr_acc->last_report.timestamp;
else
last_report_timestamp = ogs_time_from_ntp32(urr_acc->time_threshold_start);
report->type.usage_report = 1;
report->usage_report[idx].id = urr->id;
report->usage_report[idx].seqn = urr_acc->report_seqn++;
report->usage_report[idx].start_time = urr_acc->time_threshold_start;
report->usage_report[idx].end_time = ogs_time_to_ntp32(now);
report->usage_report[idx].vol_measurement = (ogs_pfcp_volume_measurement_t){
.dlnop = 1,
.ulnop = 1,
.tonop = 1,
.dlvol = 1,
.ulvol = 1,
.tovol = 1,
.total_volume = urr_acc->total_octets - urr_acc->last_report.total_octets,
.uplink_volume = urr_acc->ul_octets - urr_acc->last_report.ul_octets,
.downlink_volume = urr_acc->dl_octets - urr_acc->last_report.dl_octets,
.total_n_packets = urr_acc->total_pkts - urr_acc->last_report.total_pkts,
.uplink_n_packets = urr_acc->ul_pkts - urr_acc->last_report.ul_pkts,
.downlink_n_packets = urr_acc->dl_pkts - urr_acc->last_report.dl_pkts,
};
if (now >= last_report_timestamp)
report->usage_report[idx].dur_measurement = ((now - last_report_timestamp) + (OGS_USEC_PER_SEC/2)) / OGS_USEC_PER_SEC; /* FIXME: should use MONOTONIC here */
/* else memset sets it to 0 */
report->usage_report[idx].time_of_first_packet = ogs_time_to_ntp32(urr_acc->time_of_first_packet); /* TODO: First since last report? */
report->usage_report[idx].time_of_last_packet = ogs_time_to_ntp32(urr_acc->time_of_last_packet);
if (urr->time_threshold > 0 &&
report->usage_report[idx].dur_measurement >= urr->time_threshold)
report->usage_report[idx].rep_trigger.time_threshold = 1;
}
void upf_sess_urr_acc_snapshot(upf_sess_t *sess, ogs_pfcp_urr_t *urr)
{
upf_sess_urr_acc_t *urr_acc = &sess->urr_acc[urr->id];
urr_acc->last_report.total_octets = urr_acc->total_octets;
urr_acc->last_report.dl_octets = urr_acc->dl_octets;
urr_acc->last_report.ul_octets = urr_acc->ul_octets;
urr_acc->last_report.total_pkts = urr_acc->total_pkts;
urr_acc->last_report.dl_pkts = urr_acc->dl_pkts;
urr_acc->last_report.ul_pkts = urr_acc->ul_pkts;
urr_acc->last_report.timestamp = ogs_time_now();
}
static void upf_sess_urr_acc_time_threshold_cb(void *data)
{
ogs_pfcp_urr_t *urr = (ogs_pfcp_urr_t *)data;
ogs_pfcp_user_plane_report_t report;
ogs_pfcp_sess_t *pfcp_sess = urr->sess;
upf_sess_t *sess = UPF_SESS(pfcp_sess);
ogs_warn("upf_time_threshold_cb() triggered! urr=%p", urr);
if (urr->rep_triggers.time_threshold) {
memset(&report, 0, sizeof(report));
upf_sess_urr_acc_fill_usage_report(sess, urr, &report, 0);
report.num_of_usage_report = 1;
upf_sess_urr_acc_snapshot(sess, urr);
ogs_assert(OGS_OK ==
upf_pfcp_send_session_report_request(sess, &report));
}
/* Start new report period/iteration: */
upf_sess_urr_acc_time_threshold_setup(sess, urr);
}
void upf_sess_urr_acc_time_threshold_setup(upf_sess_t *sess, ogs_pfcp_urr_t *urr)
{
upf_sess_urr_acc_t *urr_acc = &sess->urr_acc[urr->id];
ogs_debug("Installing URR time threshold timer");
urr_acc->reporting_enabled = true;
if (!urr_acc->t_time_threshold)
urr_acc->t_time_threshold = ogs_timer_add(ogs_app()->timer_mgr,
upf_sess_urr_acc_time_threshold_cb, urr);
urr_acc->time_threshold_start = ogs_time_ntp32_now();
ogs_timer_start(urr_acc->t_time_threshold, urr->time_threshold * OGS_USEC_PER_SEC);
}
static void upf_sess_urr_acc_remove_all(upf_sess_t *sess)
{
unsigned int i;
for (i = 0; i < OGS_ARRAY_SIZE(sess->urr_acc); i++) {
if (sess->urr_acc[i].t_time_threshold) {
ogs_timer_delete(sess->urr_acc[i].t_time_threshold);
sess->urr_acc[i].t_time_threshold = NULL;
}
}
}
Reference in New Issue View Git Blame Copy Permalink