159 lines
3.8 KiB
C
159 lines
3.8 KiB
C
/* Osmocom CBC (Cell Broacast Centre) */
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/* (C) 2019 by Harald Welte <laforge@gnumonks.org>
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* All Rights Reserved
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*
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* SPDX-License-Identifier: AGPL-3.0+
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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 Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <string.h>
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#include <errno.h>
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#include <osmocom/core/linuxlist.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/utils.h>
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#include <osmocom/cbc/cbc_data.h>
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#include <osmocom/cbc/cbsp_server.h>
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const struct value_string cbc_peer_proto_name[] = {
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{ CBC_PEER_PROTO_CBSP, "CBSP" },
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{ CBC_PEER_PROTO_SABP, "SABP" },
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{ CBC_PEER_PROTO_SBcAP, "SBc-AP" },
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{ 0, NULL }
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};
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/* remove a peer from the message */
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int cbc_message_del_peer(struct cbc_message *cbcmsg, struct cbc_peer *peer)
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{
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struct cbc_message_peer *mp, *mp2;
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unsigned int i = 0;
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llist_for_each_entry_safe(mp, mp2, &cbcmsg->peers, list) {
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if (mp->peer == peer) {
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llist_del(&mp->list);
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talloc_free(mp);
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i++;
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}
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}
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OSMO_ASSERT(i == 0 || i == 1);
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return i;
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}
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struct cbc_message_peer *cbc_message_peer_get(struct cbc_message *cbcmsg, struct cbc_peer *peer)
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{
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struct cbc_message_peer *mp;
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llist_for_each_entry(mp, &cbcmsg->peers, list) {
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if (mp->peer == peer)
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return mp;
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}
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return NULL;
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}
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#if 0
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/* add a new peer to the message */
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int cbc_message_add_peer(struct cbc_message *cbcmsg, struct cbc_peer *peer)
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{
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struct cbc_message_peer *mp = talloc_zero(cbcmsg, struct cbc_message_peer);
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if (mp)
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return -ENOMEM;
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mp->peer = peer;
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llist_add_tail(&mp->list, &cbcmsg->peers);
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return 0;
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}
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#endif
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/* look-up of cbc_peer by name */
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struct cbc_peer *cbc_peer_by_name(const char *name)
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{
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struct cbc_peer *peer;
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llist_for_each_entry(peer, &g_cbc->peers, list) {
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if (peer->name && !strcmp(name, peer->name))
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return peer;
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}
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return NULL;
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}
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/* look-up of cbc_peer by tuple of (remote host, protocol) */
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struct cbc_peer *cbc_peer_by_addr_proto(const char *remote_host, uint16_t remote_port,
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enum cbc_peer_protocol proto)
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{
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struct cbc_peer *peer;
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llist_for_each_entry(peer, &g_cbc->peers, list) {
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unsigned int i;
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for (i = 0; i < peer->num_remote_host; i++) {
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if (peer->proto != proto)
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continue;
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if (!strcasecmp(remote_host, peer->remote_host[i])) {
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if (peer->remote_port == -1)
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return peer;
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else if (remote_port == peer->remote_port)
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return peer;
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}
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}
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}
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return NULL;
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}
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/* create a new cbc_peer */
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struct cbc_peer *cbc_peer_create(const char *name, enum cbc_peer_protocol proto)
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{
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struct cbc_peer *peer;
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if (name && cbc_peer_by_name(name))
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return NULL;
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peer = talloc_zero(g_cbc, struct cbc_peer);
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if (!peer)
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return NULL;
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peer->proto = proto;
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peer->name = talloc_strdup(peer, name);
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llist_add_tail(&peer->list, &g_cbc->peers);
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return peer;
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}
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/* remove a cbc_peer */
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void cbc_peer_remove(struct cbc_peer *peer)
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{
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struct cbc_message *cbcmsg;
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/* close any existing client connection */
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switch (peer->proto) {
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case CBC_PEER_PROTO_CBSP:
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if (peer->client.cbsp)
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cbsp_cbc_client_close(peer->client.cbsp);
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break;
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default:
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OSMO_ASSERT(0);
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}
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/* iterate over messages; remove client from all message_peers */
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llist_for_each_entry(cbcmsg, &g_cbc->messages, list) {
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cbc_message_del_peer(cbcmsg, peer);
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}
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llist_del(&peer->list);
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talloc_free(peer);
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}
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