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#include "dbus/sssd_dbus_common.h"
#include "dbus/sssd_dbus_client.h"
#include "util/util.h"
#include <sys/time.h>
#include "events.h"
const char* print_status(int status) {
switch (status){
case DBUS_DISPATCH_DATA_REMAINS:
return "DBUS_DISPATCH_DATA_REMAINS";
case DBUS_DISPATCH_COMPLETE:
return "DBUS_DISPATCH_COMPLETE";
case DBUS_DISPATCH_NEED_MEMORY:
return "DBUS_DISPATCH_NEED_MEMORY";
default:
return "ERROR";
}
}
void do_dispatch(struct event_context *ev,
struct timed_event *te,
struct timeval t, void *ptr) {
struct timed_event *new_event;
DBusConnection *conn = (DBusConnection *)ptr;
/* Dispatch only once each time through the mainloop to avoid
* starving other features
*/
if(dbus_connection_get_dispatch_status(conn) != DBUS_DISPATCH_COMPLETE) {
DEBUG(2,("Dispatching.\n"));
dbus_connection_dispatch(conn);
}
/* If other dispatches are waiting, queue up the do_dispatch function
* for the next loop.
*/
if(dbus_connection_get_dispatch_status(conn) != DBUS_DISPATCH_COMPLETE) {
new_event = event_add_timed(ev, ev, t, do_dispatch, conn);
if (new_event == NULL) {
DEBUG(0,("Could not add dispatch event!\n"));
exit(1);
}
}
}
/*
* integrate_connection_with_event_loop
* Set up a D-BUS connection to use the libevents mainloop
* for handling file descriptor and timed events
*/
int integrate_connection_with_event_loop(struct event_context *event_ctx,
DBusConnection *dbus_conn) {
struct dbus_connection_toplevel_context *dt_ctx;
dt_ctx = talloc_zero(event_ctx, struct dbus_connection_toplevel_context);
dt_ctx->ev = event_ctx;
dt_ctx->conn = dbus_conn;
/* Set up DBusWatch functions */
if (!dbus_connection_set_watch_functions(dt_ctx->conn, add_connection_watch,
remove_watch, toggle_connection_watch, dt_ctx, NULL)) {
DEBUG(0,("Error setting up D-BUS connection watch functions\n"));
return -1;
}
/* Set up DBusTimeout functions */
if (!dbus_connection_set_timeout_functions(dt_ctx->conn, add_connection_timeout,
remove_timeout, toggle_connection_timeout, dt_ctx, NULL)) {
DEBUG(0,("Error setting up D-BUS server timeout functions\n"));
return -1;
}
/* Set up dispatch handler */
dbus_connection_set_wakeup_main_function(dt_ctx->conn,
dbus_connection_wakeup_main, dt_ctx, NULL);
/* Attempt to dispatch immediately in case of opportunistic
* services connecting before the handlers were all up.
* If there are no messages to be dispatched, this will do
* nothing.
*/
dbus_connection_wakeup_main(dt_ctx);
return 0;
}
/*
* add_connection_watch
* Set up hooks into the libevents mainloop for
* D-BUS to add file descriptor-based events
*/
dbus_bool_t add_connection_watch(DBusWatch *watch, void *data) {
unsigned int flags;
unsigned int event_flags;
struct dbus_connection_toplevel_context *dt_ctx;
struct dbus_connection_watch_context *conn_w_ctx;
if (!dbus_watch_get_enabled(watch)) {
return TRUE;
}
dt_ctx = talloc_get_type(data, struct dbus_connection_toplevel_context);
conn_w_ctx = talloc_zero(dt_ctx, struct dbus_connection_watch_context);
conn_w_ctx->top = dt_ctx;
conn_w_ctx->watch = watch;
flags = dbus_watch_get_flags(watch);
conn_w_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;
if (event_flags == 0)
return FALSE;
/* Add the file descriptor to the event loop */
conn_w_ctx->fde = event_add_fd(conn_w_ctx->top->ev, conn_w_ctx, conn_w_ctx->fd,
event_flags, dbus_connection_read_write_handler, conn_w_ctx);
/* Save the event to the watch object so it can be removed later */
dbus_watch_set_data(conn_w_ctx->watch,conn_w_ctx->fde,NULL);
return TRUE;
}
/*
* toggle_connection_watch
* Hook for D-BUS to toggle the enabled/disabled state of
* an event in the mainloop
*/
void toggle_connection_watch(DBusWatch *watch, void *data) {
if (dbus_watch_get_enabled(watch))
add_connection_watch(watch, data);
else
remove_watch(watch, data);
}
/*
* add_connection_timeout
* Hook for D-BUS to add time-based events to the mainloop
*/
dbus_bool_t add_connection_timeout(DBusTimeout *timeout, void *data) {
struct dbus_connection_toplevel_context *dt_ctx;
struct dbus_connection_timeout_context *conn_t_ctx;
struct timeval tv;
if (!dbus_timeout_get_enabled(timeout))
return TRUE;
dt_ctx = talloc_get_type(data, struct dbus_connection_toplevel_context);
conn_t_ctx = talloc_zero(dt_ctx,struct dbus_connection_timeout_context);
conn_t_ctx->top = dt_ctx;
conn_t_ctx->timeout = timeout;
tv = _dbus_timeout_get_interval_tv(dbus_timeout_get_interval(timeout));
struct timeval rightnow;
gettimeofday(&rightnow, NULL);
conn_t_ctx->te = event_add_timed(conn_t_ctx->top->ev, conn_t_ctx, tv,
dbus_connection_timeout_handler, conn_t_ctx);
/* Save the event to the watch object so it can be removed later */
dbus_timeout_set_data(conn_t_ctx->timeout,conn_t_ctx->te,NULL);
return TRUE;
}
/*
* toggle_connection_timeout
* Hook for D-BUS to toggle the enabled/disabled state of a mainloop
* event
*/
void toggle_connection_timeout(DBusTimeout *timeout, void *data) {
if (dbus_timeout_get_enabled(timeout))
add_connection_timeout(timeout, data);
else
remove_timeout(timeout, data);
}
/*
* dbus_connection_read_write_handler
* Callback for D-BUS to handle messages on a file-descriptor
*/
void dbus_connection_read_write_handler(struct event_context *ev, struct fd_event *fde,
uint16_t flags, void *ptr) {
struct dbus_connection_watch_context *conn_w_ctx;
conn_w_ctx = talloc_get_type(ptr,struct dbus_connection_watch_context);
dbus_connection_ref(conn_w_ctx->top->conn);
if (flags & EVENT_FD_READ) {
dbus_watch_handle(conn_w_ctx->watch, DBUS_WATCH_READABLE);
}
if (flags & EVENT_FD_WRITE) {
dbus_watch_handle(conn_w_ctx->watch, DBUS_WATCH_WRITABLE);
}
dbus_connection_ref(conn_w_ctx->top->conn);
}
/*
* dbus_connection_timeout_handler
* Callback for D-BUS to handle timed events
*/
void dbus_connection_timeout_handler(struct event_context *ev, struct timed_event *te,
struct timeval t, void *data) {
struct dbus_connection_timeout_context *conn_t_ctx;
conn_t_ctx = talloc_get_type(data, struct dbus_connection_timeout_context);
dbus_timeout_handle(conn_t_ctx->timeout);
}
/* dbus_connection_wakeup_main
* D-BUS makes a callback to the wakeup_main function when
* it has data available for dispatching.
* In order to avoid blocking, this function will create a now()
* timed event to perform the dispatch during the next iteration
* through the mainloop
*/
void dbus_connection_wakeup_main(void *data) {
struct dbus_connection_toplevel_context *dct_ctx;
struct timeval tv;
struct timed_event *te;
dct_ctx = talloc_get_type(data, struct dbus_connection_toplevel_context);
gettimeofday(&tv, NULL);
/* D-BUS calls this function when it is time to do a dispatch */
te = event_add_timed(dct_ctx->ev, dct_ctx->ev, tv, do_dispatch, dct_ctx->conn);
if (te == NULL) {
DEBUG(0,("Could not add dispatch event!\n"));
exit(1);
}
}
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