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/*
* (C) 2023 by sysmocom - s.m.f.c. GmbH <info@sysmocom.de>
*
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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.
*
*/
#include <stdint.h>
#include <errno.h>
#include <string.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <talloc.h>
#include <osmocom/bb/common/logging.h>
#include <osmocom/bb/common/apn.h>
#include <osmocom/bb/common/ms.h>
#include <osmocom/bb/common/l23_app.h>
struct osmobb_apn *apn_alloc(struct osmocom_ms *ms, const char *name)
{
struct osmobb_apn *apn;
apn = talloc_zero(ms, struct osmobb_apn);
if (!apn)
return NULL;
talloc_set_name(apn, "apn_%s", name);
apn->cfg.name = talloc_strdup(apn, name);
apn->cfg.shutdown = true;
apn->cfg.tx_gpdu_seq = true;
apn->tun = osmo_tundev_alloc(apn, name);
if (!apn->tun) {
talloc_free(apn);
return NULL;
}
osmo_tundev_set_priv_data(apn->tun, apn);
apn->ms = ms;
llist_add_tail(&apn->list, &ms->gprs.apn_list);
return apn;
}
void apn_free(struct osmobb_apn *apn)
{
llist_del(&apn->list);
osmo_tundev_free(apn->tun);
talloc_free(apn);
}
int apn_start(struct osmobb_apn *apn)
{
struct l23_app_info *app_info = l23_app_info();
int rc;
if (apn->started)
return 0;
LOGPAPN(LOGL_INFO, apn, "Opening TUN device %s\n", apn->cfg.dev_name);
/* Set TUN library callback. Must have been configured by the app: */
OSMO_ASSERT(app_info && app_info->tun_data_ind_cb);
osmo_tundev_set_data_ind_cb(apn->tun, app_info->tun_data_ind_cb);
osmo_tundev_set_dev_name(apn->tun, apn->cfg.dev_name);
osmo_tundev_set_netns_name(apn->tun, apn->cfg.dev_netns_name);
rc = osmo_tundev_open(apn->tun);
if (rc < 0) {
LOGPAPN(LOGL_ERROR, apn, "Failed to configure tun device\n");
return -1;
}
LOGPAPN(LOGL_INFO, apn, "Opened TUN device %s\n", osmo_tundev_get_dev_name(apn->tun));
/* TODO: set IP addresses on the tun device once we receive them from GGSN. See
osmo-ggsn.git's apn_start() */
LOGPAPN(LOGL_NOTICE, apn, "Successfully started\n");
apn->started = true;
return 0;
}
int apn_stop(struct osmobb_apn *apn)
{
LOGPAPN(LOGL_NOTICE, apn, "Stopping\n");
/* shutdown whatever old state might be left */
if (apn->tun) {
/* release tun device */
LOGPAPN(LOGL_INFO, apn, "Closing TUN device %s\n",
osmo_tundev_get_dev_name(apn->tun));
osmo_tundev_close(apn->tun);
}
apn->started = false;
return 0;
}
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