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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <sys/capability.h>
#include "sd-bus.h"
#include "alloc-util.h"
#include "bus-get-properties.h"
#include "bus-internal.h"
#include "bus-log-control-api.h"
#include "bus-polkit.h"
#include "bus-protocol.h"
#include "bus-util.h"
#include "dns-domain.h"
#include "in-addr-util.h"
#include "log.h"
#include "macro.h"
#include "strv.h"
#include "time-util.h"
#include "timesyncd-bus.h"
#include "user-util.h"
static int property_get_servers(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
void *userdata,
sd_bus_error *error) {
ServerName **s = ASSERT_PTR(userdata);
int r;
assert(bus);
assert(reply);
r = sd_bus_message_open_container(reply, 'a', "s");
if (r < 0)
return r;
LIST_FOREACH(names, p, *s) {
r = sd_bus_message_append(reply, "s", p->string);
if (r < 0)
return r;
}
return sd_bus_message_close_container(reply);
}
static int method_set_runtime_servers(sd_bus_message *message, void *userdata, sd_bus_error *error) {
_cleanup_strv_free_ char **msg_names = NULL;
Manager *m = ASSERT_PTR(userdata);
int r;
assert(message);
r = sd_bus_message_read_strv(message, &msg_names);
if (r < 0)
return r;
STRV_FOREACH(name, msg_names) {
r = dns_name_is_valid_or_address(*name);
if (r < 0)
return log_error_errno(r, "Failed to check validity of NTP server name or address '%s': %m", *name);
if (r == 0)
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid NTP server name or address, refusing: %s", *name);
}
r = bus_verify_polkit_async(message, CAP_NET_ADMIN,
"org.freedesktop.timesync1.set-runtime-servers",
NULL, true, UID_INVALID,
&m->polkit_registry, error);
if (r < 0)
return r;
if (r == 0)
/* Polkit will call us back */
return 1;
manager_flush_runtime_servers(m);
STRV_FOREACH(name, msg_names) {
r = server_name_new(m, NULL, SERVER_RUNTIME, *name);
if (r < 0) {
manager_flush_runtime_servers(m);
return log_error_errno(r, "Failed to add runtime server '%s': %m", *name);
}
}
m->exhausted_servers = true;
manager_set_server_name(m, NULL);
(void) manager_connect(m);
return sd_bus_reply_method_return(message, NULL);
}
static int property_get_current_server_name(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
void *userdata,
sd_bus_error *error) {
ServerName **s = ASSERT_PTR(userdata);
assert(bus);
assert(reply);
return sd_bus_message_append(reply, "s", *s ? (*s)->string : NULL);
}
static int property_get_current_server_address(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
void *userdata,
sd_bus_error *error) {
ServerAddress *a;
int r;
assert(bus);
assert(reply);
assert(userdata);
a = *(ServerAddress **) userdata;
if (!a)
return sd_bus_message_append(reply, "(iay)", AF_UNSPEC, 0);
assert(IN_SET(a->sockaddr.sa.sa_family, AF_INET, AF_INET6));
r = sd_bus_message_open_container(reply, 'r', "iay");
if (r < 0)
return r;
r = sd_bus_message_append(reply, "i", a->sockaddr.sa.sa_family);
if (r < 0)
return r;
r = sd_bus_message_append_array(reply, 'y',
a->sockaddr.sa.sa_family == AF_INET ? (void*) &a->sockaddr.in.sin_addr : (void*) &a->sockaddr.in6.sin6_addr,
FAMILY_ADDRESS_SIZE(a->sockaddr.sa.sa_family));
if (r < 0)
return r;
return sd_bus_message_close_container(reply);
}
static usec_t ntp_ts_short_to_usec(const struct ntp_ts_short *ts) {
return be16toh(ts->sec) * USEC_PER_SEC + (be16toh(ts->frac) * USEC_PER_SEC) / (usec_t) 0x10000ULL;
}
static usec_t ntp_ts_to_usec(const struct ntp_ts *ts) {
return (be32toh(ts->sec) - OFFSET_1900_1970) * USEC_PER_SEC + (be32toh(ts->frac) * USEC_PER_SEC) / (usec_t) 0x100000000ULL;
}
static int property_get_ntp_message(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
void *userdata,
sd_bus_error *error) {
Manager *m = ASSERT_PTR(userdata);
int r;
assert(reply);
r = sd_bus_message_open_container(reply, 'r', "uuuuittayttttbtt");
if (r < 0)
return r;
r = sd_bus_message_append(reply, "uuuuitt",
NTP_FIELD_LEAP(m->ntpmsg.field),
NTP_FIELD_VERSION(m->ntpmsg.field),
NTP_FIELD_MODE(m->ntpmsg.field),
m->ntpmsg.stratum,
m->ntpmsg.precision,
ntp_ts_short_to_usec(&m->ntpmsg.root_delay),
ntp_ts_short_to_usec(&m->ntpmsg.root_dispersion));
if (r < 0)
return r;
r = sd_bus_message_append_array(reply, 'y', m->ntpmsg.refid, 4);
if (r < 0)
return r;
r = sd_bus_message_append(reply, "ttttbtt",
timespec_load(&m->origin_time),
ntp_ts_to_usec(&m->ntpmsg.recv_time),
ntp_ts_to_usec(&m->ntpmsg.trans_time),
timespec_load(&m->dest_time),
m->spike,
m->packet_count,
(usec_t) (m->samples_jitter * USEC_PER_SEC));
if (r < 0)
return r;
return sd_bus_message_close_container(reply);
}
static const sd_bus_vtable manager_vtable[] = {
SD_BUS_VTABLE_START(0),
SD_BUS_PROPERTY("LinkNTPServers", "as", property_get_servers, offsetof(Manager, link_servers), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("SystemNTPServers", "as", property_get_servers, offsetof(Manager, system_servers), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("RuntimeNTPServers", "as", property_get_servers, offsetof(Manager, runtime_servers), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("FallbackNTPServers", "as", property_get_servers, offsetof(Manager, fallback_servers), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("ServerName", "s", property_get_current_server_name, offsetof(Manager, current_server_name), 0),
SD_BUS_PROPERTY("ServerAddress", "(iay)", property_get_current_server_address, offsetof(Manager, current_server_address), 0),
SD_BUS_PROPERTY("RootDistanceMaxUSec", "t", bus_property_get_usec, offsetof(Manager, root_distance_max_usec), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("PollIntervalMinUSec", "t", bus_property_get_usec, offsetof(Manager, poll_interval_min_usec), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("PollIntervalMaxUSec", "t", bus_property_get_usec, offsetof(Manager, poll_interval_max_usec), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("PollIntervalUSec", "t", bus_property_get_usec, offsetof(Manager, poll_interval_usec), 0),
SD_BUS_PROPERTY("NTPMessage", "(uuuuittayttttbtt)", property_get_ntp_message, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("Frequency", "x", NULL, offsetof(Manager, drift_freq), 0),
SD_BUS_METHOD_WITH_ARGS("SetRuntimeNTPServers",
SD_BUS_ARGS("as", runtime_servers),
SD_BUS_NO_RESULT,
method_set_runtime_servers,
SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_VTABLE_END
};
int manager_connect_bus(Manager *m) {
int r;
assert(m);
if (m->bus)
return 0;
r = bus_open_system_watch_bind_with_description(&m->bus, "bus-api-timesync");
if (r < 0)
return log_error_errno(r, "Failed to connect to bus: %m");
r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/timesync1", "org.freedesktop.timesync1.Manager", manager_vtable, m);
if (r < 0)
return log_error_errno(r, "Failed to add manager object vtable: %m");
r = bus_log_control_api_register(m->bus);
if (r < 0)
return r;
r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.timesync1", 0, NULL, NULL);
if (r < 0)
return log_error_errno(r, "Failed to request name: %m");
r = sd_bus_attach_event(m->bus, m->event, 0);
if (r < 0)
return log_error_errno(r, "Failed to attach bus to event loop: %m");
return 0;
}
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