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/* Copyright (C) 2022 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
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 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 <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include "knot/common/systemd.h"
#include "contrib/strtonum.h"
#ifdef ENABLE_SYSTEMD
#include <systemd/sd-daemon.h>
#define ZONE_LOAD_TIMEOUT_DEFAULT 60
static int zone_load_timeout_s;
static int systemd_zone_load_timeout(void)
{
const char *timeout = getenv("KNOT_ZONE_LOAD_TIMEOUT_SEC");
int out;
if (timeout != NULL && timeout[0] != '\0' &&
str_to_int(timeout, &out, 0, 24 * 3600) == KNOT_EOK) {
return out;
} else {
return ZONE_LOAD_TIMEOUT_DEFAULT;
}
}
#endif
#ifdef ENABLE_DBUS
#include <systemd/sd-bus.h>
static sd_bus *_dbus = NULL;
#endif
void systemd_zone_load_timeout_notify(void)
{
#ifdef ENABLE_SYSTEMD
if (zone_load_timeout_s == 0) {
zone_load_timeout_s = systemd_zone_load_timeout();
}
sd_notifyf(0, "EXTEND_TIMEOUT_USEC=%d000000", zone_load_timeout_s);
#endif
}
void systemd_tasks_status_notify(int tasks)
{
#ifdef ENABLE_SYSTEMD
if (tasks > 0) {
sd_notifyf(0, "STATUS=Waiting for %d tasks to finish...", tasks);
} else {
sd_notify(0, "STATUS=");
}
#endif
}
void systemd_ready_notify(void)
{
#ifdef ENABLE_SYSTEMD
sd_notify(0, "READY=1\nSTATUS=");
#endif
}
void systemd_reloading_notify(void)
{
#ifdef ENABLE_SYSTEMD
sd_notify(0, "RELOADING=1\nSTATUS=");
#endif
}
void systemd_stopping_notify(void)
{
#ifdef ENABLE_SYSTEMD
sd_notify(0, "STOPPING=1\nSTATUS=");
#endif
}
int systemd_dbus_open(void)
{
#ifdef ENABLE_DBUS
if (_dbus != NULL) {
return KNOT_EOK;
}
int ret = sd_bus_open_system(&_dbus);
if (ret < 0) {
return ret;
}
/* Take a well-known service name so that clients can find us. */
ret = sd_bus_request_name(_dbus, KNOT_DBUS_NAME, 0);
if (ret < 0) {
systemd_dbus_close();
return ret;
}
return KNOT_EOK;
#else
return KNOT_ENOTSUP;
#endif
}
void systemd_dbus_close(void)
{
#ifdef ENABLE_DBUS
_dbus = sd_bus_unref(_dbus);
#endif
}
#define emit_event(event, ...) \
sd_bus_emit_signal(_dbus, KNOT_DBUS_PATH, KNOT_DBUS_NAME".events", \
event, __VA_ARGS__)
void systemd_emit_running(bool up)
{
#ifdef ENABLE_DBUS
emit_event(up ? KNOT_BUS_EVENT_STARTED : KNOT_BUS_EVENT_STOPPED, "");
#endif
}
void systemd_emit_zone_updated(const knot_dname_t *zone_name, uint32_t serial)
{
#ifdef ENABLE_DBUS
knot_dname_txt_storage_t buff;
char *zone_str = knot_dname_to_str(buff, zone_name, sizeof(buff));
if (zone_str != NULL) {
emit_event(KNOT_BUS_EVENT_ZONE_UPD, "su", zone_str, serial);
}
#endif
}
void systemd_emit_zone_submission(const knot_dname_t *zone_name, uint16_t keytag,
const char *keyid)
{
#ifdef ENABLE_DBUS
knot_dname_txt_storage_t buff;
char *zone_str = knot_dname_to_str(buff, zone_name, sizeof(buff));
if (zone_str != NULL) {
emit_event(KNOT_BUS_EVENT_ZONE_KSK_SUBM, "sqs", zone_str, keytag, keyid);
}
#endif
}
void systemd_emit_zone_invalid(const knot_dname_t *zone_name)
{
#ifdef ENABLE_DBUS
knot_dname_txt_storage_t buff;
char *zone_str = knot_dname_to_str(buff, zone_name, sizeof(buff));
if (zone_str != NULL) {
emit_event(KNOT_BUS_EVENT_ZONE_INVALID, "s", zone_str);
}
#endif
}
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