forked from acouzens/open5gs
291 lines
7.6 KiB
C
291 lines
7.6 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 "context.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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upf_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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upf_timer_association, node);
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ogs_assert(node->t_association);
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}
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ogs_fsm_create(&node->sm, upf_pfcp_state_initial, upf_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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upf_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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upf_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 = upf_event_new(UPF_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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upf_event_free(e);
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}
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}
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int upf_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 upf_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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int upf_pfcp_send_session_establishment_response(
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ogs_pfcp_xact_t *xact, upf_sess_t *sess,
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ogs_pfcp_pdr_t *created_pdr[], int num_of_created_pdr)
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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_assert(xact);
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memset(&h, 0, sizeof(ogs_pfcp_header_t));
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h.type = OGS_PFCP_SESSION_ESTABLISHMENT_RESPONSE_TYPE;
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h.seid = sess->smf_n4_seid;
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n4buf = upf_n4_build_session_establishment_response(
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h.type, sess, created_pdr, num_of_created_pdr);
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ogs_expect_or_return_val(n4buf, OGS_ERROR);
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rv = ogs_pfcp_xact_update_tx(xact, &h, n4buf);
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ogs_expect_or_return_val(rv == OGS_OK, OGS_ERROR);
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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 upf_pfcp_send_session_modification_response(
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ogs_pfcp_xact_t *xact, upf_sess_t *sess,
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ogs_pfcp_pdr_t *created_pdr[], int num_of_created_pdr)
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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_assert(xact);
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ogs_assert(created_pdr);
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memset(&h, 0, sizeof(ogs_pfcp_header_t));
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h.type = OGS_PFCP_SESSION_MODIFICATION_RESPONSE_TYPE;
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h.seid = sess->smf_n4_seid;
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n4buf = upf_n4_build_session_modification_response(
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h.type, sess, created_pdr, num_of_created_pdr);
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ogs_expect_or_return_val(n4buf, OGS_ERROR);
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rv = ogs_pfcp_xact_update_tx(xact, &h, n4buf);
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ogs_expect_or_return_val(rv == OGS_OK, OGS_ERROR);
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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 upf_pfcp_send_session_deletion_response(ogs_pfcp_xact_t *xact,
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upf_sess_t *sess)
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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_assert(xact);
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memset(&h, 0, sizeof(ogs_pfcp_header_t));
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h.type = OGS_PFCP_SESSION_DELETION_RESPONSE_TYPE;
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h.seid = sess->smf_n4_seid;
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n4buf = upf_n4_build_session_deletion_response(h.type, sess);
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ogs_expect_or_return_val(n4buf, OGS_ERROR);
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rv = ogs_pfcp_xact_update_tx(xact, &h, n4buf);
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ogs_expect_or_return_val(rv == OGS_OK, OGS_ERROR);
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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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static void sess_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_REPORT_REQUEST_TYPE:
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ogs_error("No PFCP session report 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 upf_pfcp_send_session_report_request(
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upf_sess_t *sess, ogs_pfcp_user_plane_report_t *report)
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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(report);
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memset(&h, 0, sizeof(ogs_pfcp_header_t));
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h.type = OGS_PFCP_SESSION_REPORT_REQUEST_TYPE;
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h.seid = sess->smf_n4_seid;
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n4buf = ogs_pfcp_build_session_report_request(h.type, report);
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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_timeout, sess);
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ogs_expect_or_return_val(xact, OGS_ERROR);
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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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} |