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/*
Authors:
Pavel Březina <pbrezina@redhat.com>
Stephen Gallagher <sgallagh@redhat.com>
Simo Sorce <ssorce@redhat.com>
Copyright (C) 2017 Red Hat
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 <http://www.gnu.org/licenses/>.
*/
#include <errno.h>
#include <talloc.h>
#include <dbus/dbus.h>
#include "util/util.h"
#include "sbus/connection/sbus_dbus_private.h"
static errno_t
sbus_dbus_request_name(DBusConnection *dbus_conn, const char *name)
{
DBusError dbus_error;
errno_t ret;
int flags;
int dbret;
dbus_error_init(&dbus_error);
/* We are interested only in being the primary owner of this name. */
flags = DBUS_NAME_FLAG_DO_NOT_QUEUE;
dbret = dbus_bus_request_name(dbus_conn, name, flags, &dbus_error);
if (dbret == -1) {
DEBUG(SSSDBG_CRIT_FAILURE, "Unable to request name '%s' on the system"
" bus [%s]: %s\n", name, dbus_error.name, dbus_error.message);
if (dbus_error_has_name(&dbus_error, DBUS_ERROR_ACCESS_DENIED)) {
DEBUG(SSSDBG_FATAL_FAILURE,
"Access denied - check dbus service configuration.\n");
sss_log(SSS_LOG_CRIT, "SSSD dbus service can't acquire bus name"
" - check dbus service configuration.");
}
ret = EIO;
goto done;
} else if (dbret != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER) {
DEBUG(SSSDBG_CRIT_FAILURE, "Unable to request name on the "
"system bus [%d]\n", dbret);
ret = EIO;
goto done;
}
ret = EOK;
done:
dbus_error_free(&dbus_error);
return ret;
}
DBusConnection *
sbus_dbus_connect_bus(DBusBusType bus, const char *name)
{
DBusConnection *dbus_conn;
DBusError dbus_error;
const char *busname = "not-set";
errno_t ret;
switch (bus) {
case DBUS_BUS_SESSION:
busname = "session";
break;
case DBUS_BUS_SYSTEM:
busname = "system";
break;
case DBUS_BUS_STARTER:
busname = "starter";
break;
}
dbus_error_init(&dbus_error);
/* Connect to the system bus. */
dbus_conn = dbus_bus_get(bus, &dbus_error);
if (dbus_conn == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "Unable to connect to %s bus [%s]: %s\n",
busname, dbus_error.name, dbus_error.message);
ret = EIO;
goto done;
}
if (name != NULL) {
/* Request a well-known name. */
ret = sbus_dbus_request_name(dbus_conn, name);
if (ret != EOK) {
dbus_connection_unref(dbus_conn);
goto done;
}
}
if (name == NULL) {
DEBUG(SSSDBG_TRACE_FUNC, "Connected to %s bus as anonymous\n", busname);
} else {
DEBUG(SSSDBG_TRACE_FUNC, "Connected to %s bus as %s\n", busname, name);
}
ret = EOK;
done:
dbus_error_free(&dbus_error);
if (ret != EOK) {
return NULL;
}
return dbus_conn;
}
DBusConnection *
sbus_dbus_connect_address(const char *address, const char *name, bool init)
{
DBusConnection *dbus_conn;
DBusError dbus_error;
dbus_bool_t dbret;
errno_t ret;
if (address == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "Can not connect to an empty address!\n");
return NULL;
}
dbus_error_init(&dbus_error);
dbus_conn = dbus_connection_open(address, &dbus_error);
if (dbus_conn == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "Unable to connect to %s [%s]: %s\n",
address, dbus_error.name, dbus_error.message);
ret = EIO;
goto done;
}
if (!init) {
ret = EOK;
goto done;
}
dbret = dbus_bus_register(dbus_conn, &dbus_error);
if (!dbret) {
DEBUG(SSSDBG_CRIT_FAILURE, "Unable to register to %s [%s]: %s\n",
address, dbus_error.name, dbus_error.message);
ret = EIO;
goto done;
}
/* Request a well-known name. */
if (name != NULL) {
ret = sbus_dbus_request_name(dbus_conn, name);
if (ret != EOK) {
goto done;
}
}
if (name == NULL) {
DEBUG(SSSDBG_TRACE_FUNC, "Connected to %s bus as anonymous\n", address);
} else {
DEBUG(SSSDBG_TRACE_FUNC, "Connected to %s bus as %s\n", address, name);
}
ret = EOK;
done:
dbus_error_free(&dbus_error);
if (ret != EOK && dbus_conn != NULL) {
dbus_connection_unref(dbus_conn);
dbus_conn = NULL;
}
return dbus_conn;
}
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