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/*
SSSD
Service monitor - D-BUS features
Copyright (C) Stephen Gallagher 2008
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 <sys/time.h>
#include "dbus/dbus.h"
#include "monitor.h"
#include "dbus/sssd_dbus_common.h"
#include "dbus/sssd_dbus_server.h"
#include "dbus/sssd_dbus_client.h"
#include "events.h"
#include "util/util.h"
/*
* integrate_server_with_event_loop
* Set up a D-BUS server to use the libevents mainloop
* for handling file descriptor and timed events
*/
int integrate_server_with_event_loop(struct event_context *event_ctx,
DBusServer *dbus_server,
void(*server_connection_setup)(DBusConnection *conn, struct event_context *)) {
struct dbus_server_toplevel_context *dt_ctx;
dt_ctx = talloc_zero(event_ctx, struct dbus_server_toplevel_context);
dt_ctx->ev = event_ctx;
dt_ctx->server = dbus_server;
dt_ctx->server_connection_setup = server_connection_setup;
/* Set up D-BUS new connection handler */
dbus_server_set_new_connection_function(dt_ctx->server,
new_connection_callback, dt_ctx, NULL);
/* Set up DBusWatch functions */
if (!dbus_server_set_watch_functions(dt_ctx->server, add_server_watch,
remove_watch, toggle_server_watch, dt_ctx, NULL)) {
DEBUG(0,("Error setting up D-BUS server watch functions"));
return -1;
}
/* Set up DBusTimeout functions */
if (!dbus_server_set_timeout_functions(dt_ctx->server, add_server_timeout,
remove_timeout, toggle_server_timeout, dt_ctx, NULL)) {
DEBUG(0,("Error setting up D-BUS server timeout functions"));
return -1;
}
return 0;
}
/*
* new_connection_callback
* Actions to be run upon each new client connection
* Must either perform dbus_connection_ref() on the
* new connection or else close the connection with
* dbus_connection_close()
*/
void new_connection_callback(DBusServer *server,
DBusConnection *new_connection, void *data) {
struct dbus_server_toplevel_context *dst_ctx;
dst_ctx = talloc_get_type(data,struct dbus_server_toplevel_context);
if(integrate_connection_with_event_loop(dst_ctx->ev,new_connection) != 0) {
dbus_connection_close(new_connection);
DEBUG(0,("Closing connection (failed setup)"));
return;
}
dbus_connection_ref(new_connection);
/* Run connection setup function */
DEBUG(3,("Got a connection\n"));
dst_ctx->server_connection_setup(new_connection, dst_ctx->ev);
DEBUG(3,("New connection set up.\n"));
}
/*
* add_server_watch
* Set up hooks into the libevents mainloop for
* D-BUS to add file descriptor-based events
*/
dbus_bool_t add_server_watch(DBusWatch *watch, void *data) {
unsigned int flags;
unsigned int event_flags;
struct dbus_server_toplevel_context *dt_ctx;
struct dbus_server_watch_context *svw_ctx;
if (!dbus_watch_get_enabled(watch)) {
return FALSE;
}
dt_ctx = talloc_get_type(data, struct dbus_server_toplevel_context);
svw_ctx = talloc_zero(dt_ctx, struct dbus_server_watch_context);
svw_ctx->top = dt_ctx;
svw_ctx->watch = watch;
flags = dbus_watch_get_flags(watch);
svw_ctx->fd = dbus_watch_get_unix_fd(watch);
event_flags = 0;
if (flags & DBUS_WATCH_READABLE) {
event_flags |= EVENT_FD_READ;
}
if (flags & DBUS_WATCH_WRITABLE) {
event_flags |= EVENT_FD_WRITE;
}
svw_ctx->fde = event_add_fd(svw_ctx->top->ev, svw_ctx, svw_ctx->fd,
event_flags, dbus_server_read_write_handler, svw_ctx);
/* Save the event to the watch object so it can be removed later */
dbus_watch_set_data(svw_ctx->watch,svw_ctx->fde,NULL);
return TRUE;
}
/*
* server_watch_toggled
* Hook for D-BUS to toggle the enabled/disabled state of
* an event in the mainloop
*/
void toggle_server_watch(DBusWatch *watch, void *data) {
if (dbus_watch_get_enabled(watch))
add_server_watch(watch, data);
else
remove_watch(watch, data);
}
/*
* add_server_timeout
* Hook for D-BUS to add time-based events to the mainloop
*/
dbus_bool_t add_server_timeout(DBusTimeout *timeout, void *data) {
struct dbus_server_toplevel_context *dt_ctx;
struct dbus_server_timeout_context *svt_ctx;
struct timeval tv;
if (!dbus_timeout_get_enabled(timeout))
return TRUE;
dt_ctx = talloc_get_type(data, struct dbus_server_toplevel_context);
svt_ctx = talloc_zero(dt_ctx,struct dbus_server_timeout_context);
svt_ctx->top = dt_ctx;
svt_ctx->timeout = timeout;
tv = _dbus_timeout_get_interval_tv(dbus_timeout_get_interval(timeout));
svt_ctx->te = event_add_timed(svt_ctx->top->ev, svt_ctx, tv,
dbus_server_timeout_handler, svt_ctx);
/* Save the event to the watch object so it can be removed later */
dbus_timeout_set_data(svt_ctx->timeout,svt_ctx->te,NULL);
return TRUE;
}
/*
* server_timeout_toggled
* Hook for D-BUS to toggle the enabled/disabled state of a mainloop
* event
*/
void toggle_server_timeout(DBusTimeout *timeout, void *data) {
if (dbus_timeout_get_enabled(timeout))
add_server_timeout(timeout, data);
else
remove_timeout(timeout, data);
}
/*
* dbus_server_read_write_handler
* Callback for D-BUS to handle messages on a file-descriptor
*/
void dbus_server_read_write_handler(struct event_context *ev, struct fd_event *fde,
uint16_t flags, void *ptr) {
struct dbus_server_watch_context *svw_ctx;
svw_ctx = talloc_get_type(ptr,struct dbus_server_watch_context);
dbus_server_ref(svw_ctx->top->server);
if (flags & EVENT_FD_READ) {
dbus_watch_handle(svw_ctx->watch, DBUS_WATCH_READABLE);
}
if (flags & EVENT_FD_WRITE) {
dbus_watch_handle(svw_ctx->watch, DBUS_WATCH_WRITABLE);
}
dbus_server_ref(svw_ctx->top->server);
}
void dbus_server_timeout_handler(struct event_context *ev, struct timed_event *te,
struct timeval t, void *data) {
struct dbus_server_timeout_context *svt_ctx;
svt_ctx = talloc_get_type(data, struct dbus_server_timeout_context);
dbus_timeout_handle(svt_ctx->timeout);
}
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