forked from acouzens/open5gs
606 lines
16 KiB
C
606 lines
16 KiB
C
/*
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* Copyright (C) 2019 by Sukchan Lee <acetcom@gmail.com>
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*
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* This file is part of Open5GS.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "sbi-path.h"
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#include "pfcp-path.h"
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#include "n4-build.h"
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static void pfcp_node_fsm_init(ogs_pfcp_node_t *node, bool try_to_assoicate)
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{
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smf_event_t e;
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ogs_assert(node);
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memset(&e, 0, sizeof(e));
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e.pfcp_node = node;
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if (try_to_assoicate == true) {
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node->t_association = ogs_timer_add(ogs_app()->timer_mgr,
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smf_timer_pfcp_association, node);
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ogs_assert(node->t_association);
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}
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ogs_fsm_create(&node->sm, smf_pfcp_state_initial, smf_pfcp_state_final);
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ogs_fsm_init(&node->sm, &e);
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}
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static void pfcp_node_fsm_fini(ogs_pfcp_node_t *node)
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{
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smf_event_t e;
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ogs_assert(node);
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memset(&e, 0, sizeof(e));
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e.pfcp_node = node;
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ogs_fsm_fini(&node->sm, &e);
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ogs_fsm_delete(&node->sm);
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if (node->t_association)
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ogs_timer_delete(node->t_association);
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}
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static void pfcp_recv_cb(short when, ogs_socket_t fd, void *data)
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{
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int rv;
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ssize_t size;
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smf_event_t *e = NULL;
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ogs_pkbuf_t *pkbuf = NULL;
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ogs_sockaddr_t from;
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ogs_pfcp_node_t *node = NULL;
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ogs_pfcp_header_t *h = NULL;
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ogs_assert(fd != INVALID_SOCKET);
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pkbuf = ogs_pkbuf_alloc(NULL, OGS_MAX_SDU_LEN);
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ogs_assert(pkbuf);
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ogs_pkbuf_put(pkbuf, OGS_MAX_SDU_LEN);
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size = ogs_recvfrom(fd, pkbuf->data, pkbuf->len, 0, &from);
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if (size <= 0) {
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ogs_log_message(OGS_LOG_ERROR, ogs_socket_errno,
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"ogs_recvfrom() failed");
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ogs_pkbuf_free(pkbuf);
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return;
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}
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ogs_pkbuf_trim(pkbuf, size);
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h = (ogs_pfcp_header_t *)pkbuf->data;
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if (h->version > OGS_PFCP_VERSION) {
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ogs_pfcp_header_t rsp;
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ogs_error("Not supported version[%d]", h->version);
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memset(&rsp, 0, sizeof rsp);
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rsp.flags = (OGS_PFCP_VERSION << 5);
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rsp.type = OGS_PFCP_VERSION_NOT_SUPPORTED_RESPONSE_TYPE;
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rsp.length = htobe16(4);
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rsp.sqn_only = h->sqn_only;
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if (ogs_sendto(fd, &rsp, 8, 0, &from) < 0) {
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ogs_log_message(OGS_LOG_ERROR, ogs_socket_errno,
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"ogs_sendto() failed");
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}
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ogs_pkbuf_free(pkbuf);
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return;
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}
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e = smf_event_new(SMF_EVT_N4_MESSAGE);
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ogs_assert(e);
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node = ogs_pfcp_node_find(&ogs_pfcp_self()->pfcp_peer_list, &from);
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if (!node) {
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node = ogs_pfcp_node_add(&ogs_pfcp_self()->pfcp_peer_list, &from);
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ogs_assert(node);
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node->sock = data;
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pfcp_node_fsm_init(node, false);
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}
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e->pfcp_node = node;
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e->pkbuf = pkbuf;
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rv = ogs_queue_push(ogs_app()->queue, e);
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if (rv != OGS_OK) {
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ogs_warn("ogs_queue_push() failed:%d", (int)rv);
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ogs_pkbuf_free(e->pkbuf);
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smf_event_free(e);
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}
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}
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int smf_pfcp_open(void)
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{
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ogs_socknode_t *node = NULL;
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ogs_sock_t *sock = NULL;
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/* PFCP Server */
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ogs_list_for_each(&ogs_pfcp_self()->pfcp_list, node) {
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sock = ogs_pfcp_server(node);
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if (!sock) return OGS_ERROR;
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node->poll = ogs_pollset_add(ogs_app()->pollset,
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OGS_POLLIN, sock->fd, pfcp_recv_cb, sock);
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ogs_assert(node->poll);
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}
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ogs_list_for_each(&ogs_pfcp_self()->pfcp_list6, node) {
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sock = ogs_pfcp_server(node);
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if (!sock) return OGS_ERROR;
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node->poll = ogs_pollset_add(ogs_app()->pollset,
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OGS_POLLIN, sock->fd, pfcp_recv_cb, sock);
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ogs_assert(node->poll);
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}
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OGS_SETUP_PFCP_SERVER;
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return OGS_OK;
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}
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void smf_pfcp_close(void)
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{
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ogs_pfcp_node_t *pfcp_node = NULL;
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ogs_list_for_each(&ogs_pfcp_self()->pfcp_peer_list, pfcp_node)
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pfcp_node_fsm_fini(pfcp_node);
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ogs_socknode_remove_all(&ogs_pfcp_self()->pfcp_list);
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ogs_socknode_remove_all(&ogs_pfcp_self()->pfcp_list6);
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}
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static void sess_5gc_timeout(ogs_pfcp_xact_t *xact, void *data)
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{
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smf_ue_t *smf_ue = NULL;
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smf_sess_t *sess = NULL;
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ogs_sbi_stream_t *stream = NULL;
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uint8_t type;
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char *strerror = NULL;
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ogs_assert(xact);
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ogs_assert(data);
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sess = data;
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ogs_assert(sess);
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stream = xact->assoc_stream;
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ogs_assert(stream);
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smf_ue = sess->smf_ue;
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ogs_assert(smf_ue);
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type = xact->seq[0].type;
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switch (type) {
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case OGS_PFCP_SESSION_ESTABLISHMENT_REQUEST_TYPE:
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ogs_error("No PFCP session establishment response");
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break;
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case OGS_PFCP_SESSION_MODIFICATION_REQUEST_TYPE:
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strerror = ogs_msprintf("[%s:%d] No PFCP session modification response",
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smf_ue->supi, sess->psi);
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ogs_assert(strerror);
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ogs_error("%s", strerror);
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smf_sbi_send_sm_context_update_error(stream,
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OGS_SBI_HTTP_STATUS_GATEWAY_TIMEOUT,
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strerror, NULL, NULL, NULL);
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ogs_free(strerror);
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break;
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case OGS_PFCP_SESSION_DELETION_REQUEST_TYPE:
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strerror = ogs_msprintf("[%s:%d] No PFCP session deletion response",
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smf_ue->supi, sess->psi);
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ogs_assert(strerror);
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ogs_error("%s", strerror);
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ogs_assert(true ==
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ogs_sbi_server_send_error(stream,
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OGS_SBI_HTTP_STATUS_GATEWAY_TIMEOUT, NULL, strerror, NULL));
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ogs_free(strerror);
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break;
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default:
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ogs_error("Not implemented [type:%d]", type);
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break;
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}
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}
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static void qos_flow_5gc_timeout(ogs_pfcp_xact_t *xact, void *data)
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{
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smf_ue_t *smf_ue = NULL;
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smf_sess_t *sess = NULL;
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smf_bearer_t *qos_flow = NULL;
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ogs_sbi_stream_t *stream = NULL;
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uint8_t type;
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char *strerror = NULL;
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ogs_assert(xact);
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ogs_assert(data);
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qos_flow = data;
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ogs_assert(qos_flow);
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sess = qos_flow->sess;
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ogs_assert(sess);
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smf_ue = sess->smf_ue;
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ogs_assert(smf_ue);
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type = xact->seq[0].type;
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switch (type) {
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case OGS_PFCP_SESSION_MODIFICATION_REQUEST_TYPE:
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strerror = ogs_msprintf("[%s:%d] No PFCP session modification response",
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smf_ue->supi, sess->psi);
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ogs_assert(strerror);
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ogs_error("%s", strerror);
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if (stream)
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smf_sbi_send_sm_context_update_error(stream,
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OGS_SBI_HTTP_STATUS_GATEWAY_TIMEOUT,
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strerror, NULL, NULL, NULL);
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ogs_free(strerror);
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break;
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default:
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ogs_error("Not implemented [type:%d]", type);
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break;
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}
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}
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static void sess_epc_timeout(ogs_pfcp_xact_t *xact, void *data)
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{
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uint8_t type;
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ogs_assert(xact);
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type = xact->seq[0].type;
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switch (type) {
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case OGS_PFCP_SESSION_ESTABLISHMENT_REQUEST_TYPE:
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ogs_warn("No PFCP session establishment response");
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break;
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case OGS_PFCP_SESSION_MODIFICATION_REQUEST_TYPE:
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ogs_error("No PFCP session modification response");
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break;
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case OGS_PFCP_SESSION_DELETION_REQUEST_TYPE:
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ogs_error("No PFCP session deletion response");
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break;
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default:
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ogs_error("Not implemented [type:%d]", type);
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break;
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}
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}
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static void bearer_epc_timeout(ogs_pfcp_xact_t *xact, void *data)
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{
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uint8_t type;
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ogs_assert(xact);
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type = xact->seq[0].type;
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switch (type) {
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case OGS_PFCP_SESSION_MODIFICATION_REQUEST_TYPE:
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ogs_error("No PFCP session modification response");
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break;
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default:
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ogs_error("Not implemented [type:%d]", type);
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break;
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}
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}
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int smf_5gc_pfcp_send_session_establishment_request(
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smf_sess_t *sess, ogs_sbi_stream_t *stream)
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{
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int rv;
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ogs_pkbuf_t *n4buf = NULL;
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ogs_pfcp_header_t h;
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ogs_pfcp_xact_t *xact = NULL;
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ogs_assert(sess);
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ogs_assert(stream);
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memset(&h, 0, sizeof(ogs_pfcp_header_t));
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h.type = OGS_PFCP_SESSION_ESTABLISHMENT_REQUEST_TYPE;
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h.seid = sess->upf_n4_seid;
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n4buf = smf_n4_build_session_establishment_request(h.type, sess);
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ogs_expect_or_return_val(n4buf, OGS_ERROR);
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xact = ogs_pfcp_xact_local_create(
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sess->pfcp_node, &h, n4buf, sess_5gc_timeout, sess);
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ogs_expect_or_return_val(xact, OGS_ERROR);
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xact->assoc_stream = stream;
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rv = ogs_pfcp_xact_commit(xact);
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ogs_expect(rv == OGS_OK);
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return rv;
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}
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int smf_5gc_pfcp_send_session_modification_request(
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smf_sess_t *sess, ogs_sbi_stream_t *stream,
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uint64_t flags, ogs_time_t duration)
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{
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int rv;
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ogs_pkbuf_t *n4buf = NULL;
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ogs_pfcp_header_t h;
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ogs_pfcp_xact_t *xact = NULL;
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ogs_assert(sess);
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if ((flags & OGS_PFCP_MODIFY_ERROR_INDICATION) == 0)
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ogs_assert(stream);
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memset(&h, 0, sizeof(ogs_pfcp_header_t));
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h.type = OGS_PFCP_SESSION_MODIFICATION_REQUEST_TYPE;
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h.seid = sess->upf_n4_seid;
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n4buf = smf_n4_build_session_modification_request(h.type, sess, flags);
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ogs_expect_or_return_val(n4buf, OGS_ERROR);
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xact = ogs_pfcp_xact_local_create(
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sess->pfcp_node, &h, n4buf, sess_5gc_timeout, sess);
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ogs_expect_or_return_val(xact, OGS_ERROR);
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xact->assoc_stream = stream;
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xact->modify_flags = flags | OGS_PFCP_MODIFY_SESSION;
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if (duration) {
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ogs_pfcp_xact_delayed_commit(xact, duration);
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return OGS_OK;
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} else {
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rv = ogs_pfcp_xact_commit(xact);
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ogs_expect(rv == OGS_OK);
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return rv;
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}
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}
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int smf_5gc_pfcp_send_qos_flow_modification_request(smf_bearer_t *qos_flow,
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ogs_sbi_stream_t *stream, uint64_t flags)
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{
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int rv;
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ogs_pkbuf_t *n4buf = NULL;
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ogs_pfcp_header_t h;
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ogs_pfcp_xact_t *xact = NULL;
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smf_sess_t *sess = NULL;
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ogs_assert(qos_flow);
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sess = qos_flow->sess;
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ogs_assert(sess);
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memset(&h, 0, sizeof(ogs_pfcp_header_t));
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h.type = OGS_PFCP_SESSION_MODIFICATION_REQUEST_TYPE;
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h.seid = sess->upf_n4_seid;
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n4buf = smf_n4_build_qos_flow_modification_request(h.type, qos_flow, flags);
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ogs_expect_or_return_val(n4buf, OGS_ERROR);
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xact = ogs_pfcp_xact_local_create(
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sess->pfcp_node, &h, n4buf, qos_flow_5gc_timeout, qos_flow);
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ogs_expect_or_return_val(xact, OGS_ERROR);
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xact->assoc_stream = stream;
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xact->modify_flags = flags;
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rv = ogs_pfcp_xact_commit(xact);
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ogs_expect(rv == OGS_OK);
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return rv;
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}
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int smf_5gc_pfcp_send_session_deletion_request(
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smf_sess_t *sess, ogs_sbi_stream_t *stream, int trigger)
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{
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int rv;
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ogs_pkbuf_t *n4buf = NULL;
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ogs_pfcp_header_t h;
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ogs_pfcp_xact_t *xact = NULL;
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ogs_assert(sess);
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ogs_assert(trigger);
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memset(&h, 0, sizeof(ogs_pfcp_header_t));
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h.type = OGS_PFCP_SESSION_DELETION_REQUEST_TYPE;
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h.seid = sess->upf_n4_seid;
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n4buf = smf_n4_build_session_deletion_request(h.type, sess);
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ogs_expect_or_return_val(n4buf, OGS_ERROR);
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xact = ogs_pfcp_xact_local_create(
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sess->pfcp_node, &h, n4buf, sess_5gc_timeout, sess);
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ogs_expect_or_return_val(xact, OGS_ERROR);
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xact->assoc_stream = stream;
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xact->delete_trigger = trigger;
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rv = ogs_pfcp_xact_commit(xact);
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ogs_expect(rv == OGS_OK);
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return rv;
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}
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int smf_epc_pfcp_send_session_establishment_request(
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smf_sess_t *sess, void *gtp_xact)
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{
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int rv;
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ogs_pkbuf_t *n4buf = NULL;
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ogs_pfcp_header_t h;
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ogs_pfcp_xact_t *xact = NULL;
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ogs_assert(sess);
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memset(&h, 0, sizeof(ogs_pfcp_header_t));
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h.type = OGS_PFCP_SESSION_ESTABLISHMENT_REQUEST_TYPE;
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h.seid = sess->upf_n4_seid;
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n4buf = smf_n4_build_session_establishment_request(h.type, sess);
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ogs_expect_or_return_val(n4buf, OGS_ERROR);
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xact = ogs_pfcp_xact_local_create(
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sess->pfcp_node, &h, n4buf, sess_epc_timeout, sess);
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ogs_expect_or_return_val(xact, OGS_ERROR);
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xact->epc = true; /* EPC PFCP transaction */
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xact->assoc_xact = gtp_xact;
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rv = ogs_pfcp_xact_commit(xact);
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ogs_expect(rv == OGS_OK);
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return rv;
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}
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int smf_epc_pfcp_send_session_modification_request(
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smf_sess_t *sess, void *gtp_xact,
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uint64_t flags, uint8_t gtp_pti, uint8_t gtp_cause)
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{
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int rv;
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ogs_pkbuf_t *n4buf = NULL;
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ogs_pfcp_header_t h;
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ogs_pfcp_xact_t *xact = NULL;
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ogs_assert(sess);
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memset(&h, 0, sizeof(ogs_pfcp_header_t));
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h.type = OGS_PFCP_SESSION_MODIFICATION_REQUEST_TYPE;
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h.seid = sess->upf_n4_seid;
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n4buf = smf_n4_build_session_modification_request(h.type, sess, flags);
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ogs_expect_or_return_val(n4buf, OGS_ERROR);
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xact = ogs_pfcp_xact_local_create(
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sess->pfcp_node, &h, n4buf, sess_epc_timeout, sess);
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ogs_expect_or_return_val(xact, OGS_ERROR);
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xact->epc = true; /* EPC PFCP transaction */
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xact->assoc_xact = gtp_xact;
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xact->modify_flags = flags | OGS_PFCP_MODIFY_SESSION;
|
|
|
|
xact->gtp_pti = gtp_pti;
|
|
xact->gtp_cause = gtp_cause;
|
|
|
|
rv = ogs_pfcp_xact_commit(xact);
|
|
ogs_expect(rv == OGS_OK);
|
|
|
|
return rv;
|
|
}
|
|
|
|
int smf_epc_pfcp_send_bearer_modification_request(
|
|
smf_bearer_t *bearer, void *gtp_xact,
|
|
uint64_t flags, uint8_t gtp_pti, uint8_t gtp_cause)
|
|
{
|
|
int rv;
|
|
ogs_pkbuf_t *n4buf = NULL;
|
|
ogs_pfcp_header_t h;
|
|
ogs_pfcp_xact_t *xact = NULL;
|
|
smf_sess_t *sess = NULL;
|
|
|
|
ogs_assert(bearer);
|
|
sess = bearer->sess;
|
|
ogs_assert(sess);
|
|
|
|
memset(&h, 0, sizeof(ogs_pfcp_header_t));
|
|
h.type = OGS_PFCP_SESSION_MODIFICATION_REQUEST_TYPE;
|
|
h.seid = sess->upf_n4_seid;
|
|
|
|
n4buf = smf_n4_build_qos_flow_modification_request(h.type, bearer, flags);
|
|
ogs_expect_or_return_val(n4buf, OGS_ERROR);
|
|
|
|
xact = ogs_pfcp_xact_local_create(
|
|
sess->pfcp_node, &h, n4buf, bearer_epc_timeout, bearer);
|
|
ogs_expect_or_return_val(xact, OGS_ERROR);
|
|
|
|
xact->epc = true; /* EPC PFCP transaction */
|
|
xact->assoc_xact = gtp_xact;
|
|
xact->modify_flags = flags;
|
|
|
|
xact->gtp_pti = gtp_pti;
|
|
xact->gtp_cause = gtp_cause;
|
|
|
|
rv = ogs_pfcp_xact_commit(xact);
|
|
ogs_expect(rv == OGS_OK);
|
|
|
|
return rv;
|
|
}
|
|
|
|
int smf_epc_pfcp_send_session_deletion_request(
|
|
smf_sess_t *sess, void *gtp_xact)
|
|
{
|
|
int rv;
|
|
ogs_pkbuf_t *n4buf = NULL;
|
|
ogs_pfcp_header_t h;
|
|
ogs_pfcp_xact_t *xact = NULL;
|
|
|
|
ogs_assert(sess);
|
|
|
|
memset(&h, 0, sizeof(ogs_pfcp_header_t));
|
|
h.type = OGS_PFCP_SESSION_DELETION_REQUEST_TYPE;
|
|
h.seid = sess->upf_n4_seid;
|
|
|
|
n4buf = smf_n4_build_session_deletion_request(h.type, sess);
|
|
ogs_expect_or_return_val(n4buf, OGS_ERROR);
|
|
|
|
xact = ogs_pfcp_xact_local_create(
|
|
sess->pfcp_node, &h, n4buf, sess_epc_timeout, sess);
|
|
ogs_expect_or_return_val(xact, OGS_ERROR);
|
|
|
|
xact->epc = true; /* EPC PFCP transaction */
|
|
|
|
/*
|
|
* << 'gtp_xact' is NOT NULL >>
|
|
*
|
|
* 1. MME sends Delete Session Request to SGW/SMF.
|
|
* 2. SMF sends Delete Session Response to SGW/MME.
|
|
*
|
|
*
|
|
* << 'gtp_xact' should be NULL >>
|
|
*
|
|
* 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.
|
|
*
|
|
* Note that the following messages are not processed here.
|
|
* - Bearer Resource Command
|
|
* - Delete Bearer Request/Response with DEDICATED BEARER.
|
|
*/
|
|
xact->assoc_xact = gtp_xact;
|
|
|
|
rv = ogs_pfcp_xact_commit(xact);
|
|
ogs_expect(rv == OGS_OK);
|
|
|
|
return rv;
|
|
}
|
|
|
|
int smf_pfcp_send_session_report_response(
|
|
ogs_pfcp_xact_t *xact, smf_sess_t *sess, uint8_t cause)
|
|
{
|
|
int rv;
|
|
ogs_pkbuf_t *sxabuf = NULL;
|
|
ogs_pfcp_header_t h;
|
|
|
|
ogs_assert(xact);
|
|
|
|
memset(&h, 0, sizeof(ogs_pfcp_header_t));
|
|
h.type = OGS_PFCP_SESSION_REPORT_RESPONSE_TYPE;
|
|
h.seid = sess->upf_n4_seid;
|
|
|
|
sxabuf = ogs_pfcp_build_session_report_response(h.type, cause);
|
|
ogs_expect_or_return_val(sxabuf, OGS_ERROR);
|
|
|
|
rv = ogs_pfcp_xact_update_tx(xact, &h, sxabuf);
|
|
ogs_expect_or_return_val(rv == OGS_OK, OGS_ERROR);
|
|
|
|
rv = ogs_pfcp_xact_commit(xact);
|
|
ogs_expect(rv == OGS_OK);
|
|
|
|
return rv;
|
|
}
|