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/*
SSSD
Data Provider Helpers
Copyright (C) Stephen Gallagher <sgallagh@redhat.com> 2009
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/>.
*/
/* Needed for res_init() */
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <resolv.h>
#include "util/util.h"
#include "confdb/confdb.h"
#include "sbus/sssd_dbus.h"
#include "monitor/monitor_interfaces.h"
int monitor_get_sbus_address(TALLOC_CTX *mem_ctx, struct confdb_ctx *confdb, char **address)
{
int ret;
char *default_address;
*address = NULL;
default_address = talloc_asprintf(mem_ctx, "unix:path=%s/%s",
PIPE_PATH, SSSD_SERVICE_PIPE);
if (default_address == NULL) {
return ENOMEM;
}
if (confdb == NULL) {
/* If the confdb isn't specified, fall to the default */
*address = default_address;
talloc_steal(mem_ctx, default_address);
ret = EOK;
goto done;
}
ret = confdb_get_string(confdb, mem_ctx,
"config/services/monitor", "sbusAddress",
default_address, address);
done:
talloc_free(default_address);
return ret;
}
static void id_callback(DBusPendingCall *pending, void *ptr)
{
DBusMessage *reply;
DBusError dbus_error;
dbus_bool_t ret;
dbus_uint16_t mon_ver;
int type;
dbus_error_init(&dbus_error);
reply = dbus_pending_call_steal_reply(pending);
if (!reply) {
/* reply should never be null. This function shouldn't be called
* until reply is valid or timeout has occurred. If reply is NULL
* here, something is seriously wrong and we should bail out.
*/
DEBUG(0, ("Severe error. A reply callback was called but no"
" reply was received and no timeout occurred\n"));
/* FIXME: Destroy this connection ? */
goto done;
}
type = dbus_message_get_type(reply);
switch (type) {
case DBUS_MESSAGE_TYPE_METHOD_RETURN:
ret = dbus_message_get_args(reply, &dbus_error,
DBUS_TYPE_UINT16, &mon_ver,
DBUS_TYPE_INVALID);
if (!ret) {
DEBUG(1, ("Failed to parse message\n"));
if (dbus_error_is_set(&dbus_error)) dbus_error_free(&dbus_error);
/* FIXME: Destroy this connection ? */
goto done;
}
DEBUG(4, ("Got id ack and version (%d) from Monitor\n", mon_ver));
break;
case DBUS_MESSAGE_TYPE_ERROR:
DEBUG(0,("The Monitor returned an error [%s]\n",
dbus_message_get_error_name(reply)));
/* Falling through to default intentionally*/
default:
/*
* Timeout or other error occurred or something
* unexpected happened.
* It doesn't matter which, because either way we
* know that this connection isn't trustworthy.
* We'll destroy it now.
*/
/* FIXME: Destroy this connection ? */
break;
}
done:
dbus_pending_call_unref(pending);
dbus_message_unref(reply);
}
int monitor_common_send_id(struct sbus_connection *conn,
const char *name, uint16_t version)
{
DBusPendingCall *pending_reply;
DBusConnection *dbus_conn;
DBusMessage *msg;
dbus_bool_t ret;
dbus_conn = sbus_get_connection(conn);
/* create the message */
msg = dbus_message_new_method_call(NULL,
MON_SRV_PATH,
MON_SRV_INTERFACE,
MON_SRV_METHOD_REGISTER);
if (msg == NULL) {
DEBUG(0, ("Out of memory?!\n"));
return ENOMEM;
}
DEBUG(4, ("Sending ID: (%s,%d)\n", name, version));
ret = dbus_message_append_args(msg,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_UINT16, &version,
DBUS_TYPE_INVALID);
if (!ret) {
DEBUG(1, ("Failed to build message\n"));
return EIO;
}
ret = dbus_connection_send_with_reply(dbus_conn, msg, &pending_reply,
30000 /* TODO: set timeout */);
if (!ret || !pending_reply) {
/*
* Critical Failure
* We can't communicate on this connection
* We'll drop it using the default destructor.
*/
DEBUG(0, ("D-BUS send failed.\n"));
dbus_message_unref(msg);
return EIO;
}
/* Set up the reply handler */
dbus_pending_call_set_notify(pending_reply, id_callback, NULL, NULL);
dbus_message_unref(msg);
return EOK;
}
int monitor_common_pong(DBusMessage *message,
struct sbus_connection *conn)
{
DBusMessage *reply;
dbus_bool_t ret;
reply = dbus_message_new_method_return(message);
if (!reply) return ENOMEM;
ret = dbus_message_append_args(reply, DBUS_TYPE_INVALID);
if (!ret) {
dbus_message_unref(reply);
return EIO;
}
/* send reply back */
sbus_conn_send_reply(conn, reply);
dbus_message_unref(reply);
return EOK;
}
int monitor_common_res_init(DBusMessage *message,
struct sbus_connection *conn)
{
int ret;
ret = res_init();
if(ret != 0) {
return EIO;
}
/* Send an empty reply to acknowledge receipt */
return monitor_common_pong(message, conn);
}
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