-/* -*- mode: C; c-file-style: "gnu" -*- */
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/* connection.c Client connections
*
* Copyright (C) 2003 Red Hat, Inc.
+ * Copyright (C) 2013 Samsung Electronics
*
- * Licensed under the Academic Free License version 1.2
+ * Licensed under the Academic Free License version 2.1
*
* 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
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
+
+#include <config.h>
#include "connection.h"
#include "dispatch.h"
-#include "loop.h"
#include "policy.h"
#include "services.h"
#include "utils.h"
+#include "signals.h"
+#include "expirelist.h"
+#include "selinux.h"
#include <dbus/dbus-list.h>
+#include <dbus/dbus-hash.h>
+#include <dbus/dbus-timeout.h>
+
+/* Trim executed commands to this length; we want to keep logs readable */
+#define MAX_LOG_COMMAND_LEN 50
static void bus_connection_remove_transactions (DBusConnection *connection);
+typedef struct
+{
+ BusExpireItem expire_item;
+
+ DBusConnection *will_get_reply;
+ DBusConnection *will_send_reply;
+
+ dbus_uint32_t reply_serial;
+
+} BusPendingReply;
+
struct BusConnections
{
int refcount;
- DBusList *list; /**< List of all the connections */
+ DBusList *completed; /**< List of all completed connections */
+ int n_completed; /**< Length of completed list */
+ DBusList *incomplete; /**< List of all not-yet-active connections */
+ int n_incomplete; /**< Length of incomplete list */
BusContext *context;
+ DBusHashTable *completed_by_user; /**< Number of completed connections for each UID */
+ DBusTimeout *expire_timeout; /**< Timeout for expiring incomplete connections. */
+ int stamp; /**< Incrementing number */
+ BusExpireList *pending_replies; /**< List of pending replies */
+
+#ifdef DBUS_ENABLE_STATS
+ int total_match_rules;
+ int peak_match_rules;
+ int peak_match_rules_per_conn;
+
+ int total_bus_names;
+ int peak_bus_names;
+ int peak_bus_names_per_conn;
+#endif
};
-static int connection_data_slot = -1;
-static int connection_data_slot_refcount = 0;
+static dbus_int32_t connection_data_slot = -1;
typedef struct
{
BusConnections *connections;
+ DBusList *link_in_connection_list;
DBusConnection *connection;
DBusList *services_owned;
+ int n_services_owned;
+ DBusList *match_rules;
+ int n_match_rules;
char *name;
DBusList *transaction_messages; /**< Stuff we need to send as part of a transaction */
DBusMessage *oom_message;
DBusPreallocatedSend *oom_preallocated;
- unsigned long *group_ids;
- int n_group_ids;
- BusPolicy *policy;
+ BusClientPolicy *policy;
+
+ char *cached_loginfo_string;
+ BusSELinuxID *selinux_id;
+
+ long connection_tv_sec; /**< Time when we connected (seconds component) */
+ long connection_tv_usec; /**< Time when we connected (microsec component) */
+ int stamp; /**< connections->stamp last time we were traversed */
+
+#ifdef DBUS_ENABLE_STATS
+ int peak_match_rules;
+ int peak_bus_names;
+#endif
} BusConnectionData;
+static dbus_bool_t bus_pending_reply_expired (BusExpireList *list,
+ DBusList *link,
+ void *data);
+
+static void bus_connection_drop_pending_replies (BusConnections *connections,
+ DBusConnection *connection);
+
+static dbus_bool_t expire_incomplete_timeout (void *data);
+
#define BUS_CONNECTION_DATA(connection) (dbus_connection_get_data ((connection), connection_data_slot))
-static dbus_bool_t
-connection_data_slot_ref (void)
+static DBusLoop*
+connection_get_loop (DBusConnection *connection)
{
- if (connection_data_slot < 0)
- {
- connection_data_slot = dbus_connection_allocate_data_slot ();
-
- if (connection_data_slot < 0)
- return FALSE;
+ BusConnectionData *d;
- _dbus_assert (connection_data_slot_refcount == 0);
- }
+ d = BUS_CONNECTION_DATA (connection);
+
+ return bus_context_get_loop (d->connections->context);
+}
- connection_data_slot_refcount += 1;
- return TRUE;
+static int
+get_connections_for_uid (BusConnections *connections,
+ dbus_uid_t uid)
+{
+ void *val;
+ int current_count;
+
+ /* val is NULL is 0 when it isn't in the hash yet */
+
+ val = _dbus_hash_table_lookup_uintptr (connections->completed_by_user,
+ uid);
+
+ current_count = _DBUS_POINTER_TO_INT (val);
+ return current_count;
}
-static void
-connection_data_slot_unref (void)
+static dbus_bool_t
+adjust_connections_for_uid (BusConnections *connections,
+ dbus_uid_t uid,
+ int adjustment)
{
- _dbus_assert (connection_data_slot_refcount > 0);
+ int current_count;
- connection_data_slot_refcount -= 1;
+ current_count = get_connections_for_uid (connections, uid);
+
+ _dbus_verbose ("Adjusting connection count for UID " DBUS_UID_FORMAT
+ ": was %d adjustment %d making %d\n",
+ uid, current_count, adjustment, current_count + adjustment);
+
+ _dbus_assert (current_count >= 0);
- if (connection_data_slot_refcount == 0)
+ current_count += adjustment;
+
+ _dbus_assert (current_count >= 0);
+
+ if (current_count == 0)
{
- dbus_connection_free_data_slot (connection_data_slot);
- connection_data_slot = -1;
+ _dbus_hash_table_remove_uintptr (connections->completed_by_user, uid);
+ return TRUE;
+ }
+ else
+ {
+ dbus_bool_t retval;
+
+ retval = _dbus_hash_table_insert_uintptr (connections->completed_by_user,
+ uid, _DBUS_INT_TO_POINTER (current_count));
+
+ /* only positive adjustment can fail as otherwise
+ * a hash entry should already exist
+ */
+ _dbus_assert (adjustment > 0 ||
+ (adjustment <= 0 && retval));
+
+ return retval;
}
}
{
BusConnectionData *d;
BusService *service;
-
+ BusMatchmaker *matchmaker;
+#ifdef ENABLE_KDBUS_TRANSPORT
+ dbus_bool_t is_phantom = FALSE;
+#endif
+
d = BUS_CONNECTION_DATA (connection);
_dbus_assert (d != NULL);
_dbus_verbose ("%s disconnected, dropping all service ownership and releasing\n",
d->name ? d->name : "(inactive)");
+
+#ifdef ENABLE_KDBUS_TRANSPORT
+ if(bus_context_is_kdbus(d->connections->context) && (strcmp(bus_connection_get_name(connection), ":1.1")))
+ is_phantom = TRUE;
+#endif
+
+ /* Delete our match rules */
+ if (d->n_match_rules > 0)
+ {
+ matchmaker = bus_context_get_matchmaker (d->connections->context);
+ bus_matchmaker_disconnected (matchmaker, connection);
+ }
- /* Drop any service ownership. FIXME Unfortunately, this requires
+ /* Drop any service ownership. Unfortunately, this requires
* memory allocation and there doesn't seem to be a good way to
* handle it other than sleeping; we can't "fail" the operation of
* disconnecting a client, and preallocating a broadcast "service is
* now gone" message for every client-service pair seems kind of
- * involved. Probably we need to do that though, and also
- * extend BusTransaction to be able to revert generic
- * stuff, not just sending a message (so we can e.g. revert
- * removal of service owners).
+ * involved.
*/
while ((service = _dbus_list_get_last (&d->services_owned)))
{
dbus_error_init (&error);
- transaction = NULL;
- while (transaction == NULL)
- {
- transaction = bus_transaction_new (d->connections->context);
- bus_wait_for_memory ();
- }
+ while ((transaction = bus_transaction_new (d->connections->context)) == NULL)
+ _dbus_wait_for_memory ();
if (!bus_service_remove_owner (service, connection,
transaction, &error))
{
+ _DBUS_ASSERT_ERROR_IS_SET (&error);
+
if (dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY))
{
dbus_error_free (&error);
bus_transaction_cancel_and_free (transaction);
- bus_wait_for_memory ();
+ _dbus_wait_for_memory ();
goto retry;
}
else
- _dbus_assert_not_reached ("Removing service owner failed for non-memory-related reason");
+ {
+ _dbus_verbose ("Failed to remove service owner: %s %s\n",
+ error.name, error.message);
+ _dbus_assert_not_reached ("Removing service owner failed for non-memory-related reason");
+ }
}
bus_transaction_execute_and_free (transaction);
dbus_connection_set_unix_user_function (connection,
NULL, NULL, NULL);
+ dbus_connection_set_windows_user_function (connection,
+ NULL, NULL, NULL);
+
+ dbus_connection_set_dispatch_status_function (connection,
+ NULL, NULL, NULL);
bus_connection_remove_transactions (connection);
- _dbus_list_remove (&d->connections->list, connection);
+ if (d->link_in_connection_list != NULL)
+ {
+ if (d->name != NULL)
+ {
+ unsigned long uid;
+
+ _dbus_list_remove_link (&d->connections->completed, d->link_in_connection_list);
+ d->link_in_connection_list = NULL;
+ d->connections->n_completed -= 1;
+
+ if (dbus_connection_get_unix_user (connection, &uid))
+ {
+ if (!adjust_connections_for_uid (d->connections,
+ uid, -1))
+ _dbus_assert_not_reached ("adjusting downward should never fail");
+ }
+ }
+ else
+ {
+ _dbus_list_remove_link (&d->connections->incomplete, d->link_in_connection_list);
+ d->link_in_connection_list = NULL;
+ d->connections->n_incomplete -= 1;
+ }
+
+ _dbus_assert (d->connections->n_incomplete >= 0);
+ _dbus_assert (d->connections->n_completed >= 0);
+ }
+ bus_connection_drop_pending_replies (d->connections, connection);
+
/* frees "d" as side effect */
dbus_connection_set_data (connection,
connection_data_slot,
NULL, NULL);
- dbus_connection_unref (connection);
+#ifdef ENABLE_KDBUS_TRANSPORT
+ if(is_phantom)
+ dbus_connection_unref_phantom(connection);
+ else
+#endif
+ dbus_connection_unref (connection);
}
static dbus_bool_t
-connection_watch_callback (DBusWatch *watch,
- unsigned int condition,
- void *data)
+add_connection_watch (DBusWatch *watch,
+ void *data)
{
DBusConnection *connection = data;
- dbus_bool_t retval;
-
- dbus_connection_ref (connection);
-
- retval = dbus_connection_handle_watch (connection, watch, condition);
- bus_connection_dispatch_all_messages (connection);
-
- dbus_connection_unref (connection);
-
- return retval;
-}
-
-static dbus_bool_t
-add_connection_watch (DBusWatch *watch,
- DBusConnection *connection)
-{
- return bus_loop_add_watch (watch, connection_watch_callback, connection,
- NULL);
+ return _dbus_loop_add_watch (connection_get_loop (connection), watch);
}
static void
remove_connection_watch (DBusWatch *watch,
- DBusConnection *connection)
+ void *data)
{
- bus_loop_remove_watch (watch, connection_watch_callback, connection);
+ DBusConnection *connection = data;
+
+ _dbus_loop_remove_watch (connection_get_loop (connection), watch);
}
static void
-connection_timeout_callback (DBusTimeout *timeout,
- void *data)
+toggle_connection_watch (DBusWatch *watch,
+ void *data)
{
DBusConnection *connection = data;
- dbus_connection_ref (connection);
-
- /* can return FALSE on OOM but we just let it fire again later */
- dbus_timeout_handle (timeout);
-
- bus_connection_dispatch_all_messages (connection);
-
- dbus_connection_unref (connection);
+ _dbus_loop_toggle_watch (connection_get_loop (connection), watch);
}
static dbus_bool_t
add_connection_timeout (DBusTimeout *timeout,
- DBusConnection *connection)
+ void *data)
{
- return bus_loop_add_timeout (timeout, connection_timeout_callback, connection, NULL);
+ DBusConnection *connection = data;
+
+ return _dbus_loop_add_timeout (connection_get_loop (connection), timeout);
}
static void
remove_connection_timeout (DBusTimeout *timeout,
- DBusConnection *connection)
+ void *data)
{
- bus_loop_remove_timeout (timeout, connection_timeout_callback, connection);
+ DBusConnection *connection = data;
+
+ _dbus_loop_remove_timeout (connection_get_loop (connection), timeout);
+}
+
+static void
+dispatch_status_function (DBusConnection *connection,
+ DBusDispatchStatus new_status,
+ void *data)
+{
+ DBusLoop *loop = data;
+
+ if (new_status != DBUS_DISPATCH_COMPLETE)
+ {
+ while (!_dbus_loop_queue_dispatch (loop, connection))
+ _dbus_wait_for_memory ();
+ }
}
static dbus_bool_t
-allow_user_function (DBusConnection *connection,
- unsigned long uid,
- void *data)
+allow_unix_user_function (DBusConnection *connection,
+ unsigned long uid,
+ void *data)
{
BusConnectionData *d;
d = BUS_CONNECTION_DATA (connection);
_dbus_assert (d != NULL);
-
- return TRUE; /* FIXME - this is just until we can parse a config file */
- return bus_context_allow_user (d->connections->context, uid);
+ return bus_context_allow_unix_user (d->connections->context, uid);
}
static void
/* services_owned should be NULL since we should be disconnected */
_dbus_assert (d->services_owned == NULL);
+ _dbus_assert (d->n_services_owned == 0);
/* similarly */
_dbus_assert (d->transaction_messages == NULL);
dbus_message_unref (d->oom_message);
if (d->policy)
- bus_policy_unref (d->policy);
+ bus_client_policy_unref (d->policy);
+
+ if (d->selinux_id)
+ bus_selinux_id_unref (d->selinux_id);
- dbus_free (d->group_ids);
+ dbus_free (d->cached_loginfo_string);
dbus_free (d->name);
{
BusConnections *connections;
- if (!connection_data_slot_ref ())
- return NULL;
+ if (!dbus_connection_allocate_data_slot (&connection_data_slot))
+ goto failed_0;
connections = dbus_new0 (BusConnections, 1);
if (connections == NULL)
- {
- connection_data_slot_unref ();
- return NULL;
- }
+ goto failed_1;
+
+ connections->completed_by_user = _dbus_hash_table_new (DBUS_HASH_UINTPTR,
+ NULL, NULL);
+ if (connections->completed_by_user == NULL)
+ goto failed_2;
+
+ connections->expire_timeout = _dbus_timeout_new (100, /* irrelevant */
+ expire_incomplete_timeout,
+ connections, NULL);
+ if (connections->expire_timeout == NULL)
+ goto failed_3;
+
+ _dbus_timeout_set_enabled (connections->expire_timeout, FALSE);
+
+ connections->pending_replies = bus_expire_list_new (bus_context_get_loop (context),
+ bus_context_get_reply_timeout (context),
+ bus_pending_reply_expired,
+ connections);
+ if (connections->pending_replies == NULL)
+ goto failed_4;
+
+ if (!_dbus_loop_add_timeout (bus_context_get_loop (context),
+ connections->expire_timeout))
+ goto failed_5;
connections->refcount = 1;
connections->context = context;
return connections;
+
+ failed_5:
+ bus_expire_list_free (connections->pending_replies);
+ failed_4:
+ _dbus_timeout_unref (connections->expire_timeout);
+ failed_3:
+ _dbus_hash_table_unref (connections->completed_by_user);
+ failed_2:
+ dbus_free (connections);
+ failed_1:
+ dbus_connection_free_data_slot (&connection_data_slot);
+ failed_0:
+ return NULL;
}
-void
+BusConnections *
bus_connections_ref (BusConnections *connections)
{
_dbus_assert (connections->refcount > 0);
connections->refcount += 1;
+
+ return connections;
}
void
connections->refcount -= 1;
if (connections->refcount == 0)
{
- while (connections->list != NULL)
+ /* drop all incomplete */
+ while (connections->incomplete != NULL)
+ {
+ DBusConnection *connection;
+
+ connection = connections->incomplete->data;
+
+ dbus_connection_ref (connection);
+ dbus_connection_close (connection);
+ bus_connection_disconnected (connection);
+ dbus_connection_unref (connection);
+ }
+
+ _dbus_assert (connections->n_incomplete == 0);
+
+ /* drop all real connections */
+ while (connections->completed != NULL)
{
DBusConnection *connection;
- connection = connections->list->data;
+ connection = connections->completed->data;
dbus_connection_ref (connection);
- dbus_connection_disconnect (connection);
+ dbus_connection_close (connection);
bus_connection_disconnected (connection);
dbus_connection_unref (connection);
}
+
+ _dbus_assert (connections->n_completed == 0);
+
+ bus_expire_list_free (connections->pending_replies);
+
+ _dbus_loop_remove_timeout (bus_context_get_loop (connections->context),
+ connections->expire_timeout);
- _dbus_list_clear (&connections->list);
+ _dbus_timeout_unref (connections->expire_timeout);
+
+ _dbus_hash_table_unref (connections->completed_by_user);
dbus_free (connections);
- connection_data_slot_unref ();
+ dbus_connection_free_data_slot (&connection_data_slot);
+ }
+}
+
+/* Used for logging */
+static dbus_bool_t
+cache_peer_loginfo_string (BusConnectionData *d,
+ DBusConnection *connection)
+{
+ DBusString loginfo_buf;
+ unsigned long uid;
+ unsigned long pid;
+ char *windows_sid;
+ dbus_bool_t prev_added;
+
+ if (!_dbus_string_init (&loginfo_buf))
+ return FALSE;
+
+ prev_added = FALSE;
+ if (dbus_connection_get_unix_user (connection, &uid))
+ {
+ if (!_dbus_string_append_printf (&loginfo_buf, "uid=%ld", uid))
+ goto oom;
+ else
+ prev_added = TRUE;
+ }
+
+ if (dbus_connection_get_unix_process_id (connection, &pid))
+ {
+ if (prev_added)
+ {
+ if (!_dbus_string_append_byte (&loginfo_buf, ' '))
+ goto oom;
+ }
+ if (!_dbus_string_append_printf (&loginfo_buf, "pid=%ld comm=\"", pid))
+ goto oom;
+ /* Ignore errors here; we may not have permissions to read the
+ * proc file. */
+ _dbus_command_for_pid (pid, &loginfo_buf, MAX_LOG_COMMAND_LEN, NULL);
+ if (!_dbus_string_append_byte (&loginfo_buf, '"'))
+ goto oom;
+ }
+
+ if (dbus_connection_get_windows_user (connection, &windows_sid))
+ {
+ dbus_bool_t did_append;
+ did_append = _dbus_string_append_printf (&loginfo_buf,
+ "sid=\"%s\" ", windows_sid);
+ dbus_free (windows_sid);
+ if (!did_append)
+ goto oom;
}
+
+ if (!_dbus_string_steal_data (&loginfo_buf, &(d->cached_loginfo_string)))
+ goto oom;
+
+ _dbus_string_free (&loginfo_buf);
+
+ return TRUE;
+oom:
+ _dbus_string_free (&loginfo_buf);
+ return FALSE;
}
dbus_bool_t
bus_connections_setup_connection (BusConnections *connections,
DBusConnection *connection)
{
+
BusConnectionData *d;
dbus_bool_t retval;
+ DBusError error;
+
d = dbus_new0 (BusConnectionData, 1);
d->connections = connections;
d->connection = connection;
-
+
+ _dbus_get_monotonic_time (&d->connection_tv_sec,
+ &d->connection_tv_usec);
+
_dbus_assert (connection_data_slot >= 0);
if (!dbus_connection_set_data (connection,
return FALSE;
}
+ dbus_connection_set_route_peer_messages (connection, TRUE);
+
retval = FALSE;
- d->n_group_ids = 0;
- d->group_ids = NULL;
-
+ dbus_error_init (&error);
+ d->selinux_id = bus_selinux_init_connection_id (connection,
+ &error);
+ if (dbus_error_is_set (&error))
+ {
+ /* This is a bit bogus because we pretend all errors
+ * are OOM; this is done because we know that in bus.c
+ * an OOM error disconnects the connection, which is
+ * the same thing we want on any other error.
+ */
+ dbus_error_free (&error);
+ goto out;
+ }
+
if (!dbus_connection_set_watch_functions (connection,
- (DBusAddWatchFunction) add_connection_watch,
- (DBusRemoveWatchFunction) remove_connection_watch,
- NULL,
+ add_connection_watch,
+ remove_connection_watch,
+ toggle_connection_watch,
connection,
NULL))
goto out;
if (!dbus_connection_set_timeout_functions (connection,
- (DBusAddTimeoutFunction) add_connection_timeout,
- (DBusRemoveTimeoutFunction) remove_connection_timeout,
+ add_connection_timeout,
+ remove_connection_timeout,
NULL,
connection, NULL))
goto out;
-
+ /* For now we don't need to set a Windows user function because
+ * there are no policies in the config file controlling what
+ * Windows users can connect. The default 'same user that owns the
+ * bus can connect' behavior of DBusConnection is fine on Windows.
+ */
dbus_connection_set_unix_user_function (connection,
- allow_user_function,
+ allow_unix_user_function,
NULL, NULL);
+
+ dbus_connection_set_dispatch_status_function (connection,
+ dispatch_status_function,
+ bus_context_get_loop (connections->context),
+ NULL);
+
+ d->link_in_connection_list = _dbus_list_alloc_link (connection);
+ if (d->link_in_connection_list == NULL)
+ goto out;
/* Setup the connection with the dispatcher */
if (!bus_dispatch_add_connection (connection))
goto out;
-
- if (!_dbus_list_append (&connections->list, connection))
+
+ if (dbus_connection_get_dispatch_status (connection) != DBUS_DISPATCH_COMPLETE)
{
- bus_dispatch_remove_connection (connection);
- goto out;
+ if (!_dbus_loop_queue_dispatch (bus_context_get_loop (connections->context), connection))
+ {
+ bus_dispatch_remove_connection (connection);
+ goto out;
+ }
}
+
+ _dbus_list_append_link (&connections->incomplete, d->link_in_connection_list);
+ connections->n_incomplete += 1;
dbus_connection_ref (connection);
+
+ /* Note that we might disconnect ourselves here, but it only takes
+ * effect on return to the main loop. We call this to free up
+ * expired connections if possible, and to queue the timeout for our
+ * own expiration.
+ */
+ bus_connections_expire_incomplete (connections);
+
+ /* And we might also disconnect ourselves here, but again it
+ * only takes effect on return to main loop.
+ */
+ if (connections->n_incomplete >
+ bus_context_get_max_incomplete_connections (connections->context))
+ {
+ _dbus_verbose ("Number of incomplete connections exceeds max, dropping oldest one\n");
+
+ _dbus_assert (connections->incomplete != NULL);
+ /* Disconnect the oldest unauthenticated connection. FIXME
+ * would it be more secure to drop a *random* connection? This
+ * algorithm seems to mean that if someone can create new
+ * connections quickly enough, they can keep anyone else from
+ * completing authentication. But random may or may not really
+ * help with that, a more elaborate solution might be required.
+ */
+ dbus_connection_close (connections->incomplete->data);
+ }
+
retval = TRUE;
out:
if (!retval)
{
- if (!dbus_connection_set_data (connection,
- connection_data_slot,
- NULL, NULL))
- _dbus_assert_not_reached ("failed to set connection data to null");
-
+ if (d->selinux_id)
+ bus_selinux_id_unref (d->selinux_id);
+ d->selinux_id = NULL;
+
if (!dbus_connection_set_watch_functions (connection,
NULL, NULL, NULL,
connection,
dbus_connection_set_unix_user_function (connection,
NULL, NULL, NULL);
+
+ dbus_connection_set_windows_user_function (connection,
+ NULL, NULL, NULL);
+
+ dbus_connection_set_dispatch_status_function (connection,
+ NULL, NULL, NULL);
+
+ if (d->link_in_connection_list != NULL)
+ {
+ _dbus_assert (d->link_in_connection_list->next == NULL);
+ _dbus_assert (d->link_in_connection_list->prev == NULL);
+ _dbus_list_free_link (d->link_in_connection_list);
+ d->link_in_connection_list = NULL;
+ }
+
+ if (!dbus_connection_set_data (connection,
+ connection_data_slot,
+ NULL, NULL))
+ _dbus_assert_not_reached ("failed to set connection data to null");
+
+ /* "d" has now been freed */
}
return retval;
}
-dbus_bool_t
-bus_connection_get_groups (DBusConnection *connection,
- const unsigned long **groups,
- int *n_groups)
-{
- BusConnectionData *d;
-
- d = BUS_CONNECTION_DATA (connection);
-
- _dbus_assert (d != NULL);
-
- *groups = NULL;
- *n_groups = 0;
+void
+bus_connections_expire_incomplete (BusConnections *connections)
+{
+ int next_interval;
- /* we do a lazy lookup on groups a user is in for two reasons:
- * 1) we can't do it on connection setup since the user
- * hasn't authenticated and 2) it might be expensive
- * and we don't need to do it if there are no group-based
- * rules in the config file
- */
+ next_interval = -1;
- if (d->n_group_ids == 0)
+ if (connections->incomplete != NULL)
{
- unsigned long uid;
+ long tv_sec, tv_usec;
+ DBusList *link;
+ int auth_timeout;
- if (dbus_connection_get_unix_user (connection, &uid))
+ _dbus_get_monotonic_time (&tv_sec, &tv_usec);
+ auth_timeout = bus_context_get_auth_timeout (connections->context);
+
+ link = _dbus_list_get_first_link (&connections->incomplete);
+ while (link != NULL)
{
- if (!_dbus_get_groups (uid, &d->group_ids, &d->n_group_ids))
+ DBusList *next = _dbus_list_get_next_link (&connections->incomplete, link);
+ DBusConnection *connection;
+ BusConnectionData *d;
+ double elapsed;
+
+ connection = link->data;
+
+ d = BUS_CONNECTION_DATA (connection);
+
+ _dbus_assert (d != NULL);
+
+ elapsed = ELAPSED_MILLISECONDS_SINCE (d->connection_tv_sec,
+ d->connection_tv_usec,
+ tv_sec, tv_usec);
+
+ if (elapsed >= (double) auth_timeout)
+ {
+ _dbus_verbose ("Timing out authentication for connection %p\n", connection);
+ dbus_connection_close (connection);
+ }
+ else
{
- _dbus_verbose ("Did not get any groups for UID %lu\n",
- uid);
- return FALSE;
+ /* We can end the loop, since the connections are in oldest-first order */
+ next_interval = ((double)auth_timeout) - elapsed;
+ _dbus_verbose ("Connection %p authentication expires in %d milliseconds\n",
+ connection, next_interval);
+
+ break;
}
+
+ link = next;
}
}
- *groups = d->group_ids;
- *n_groups = d->n_group_ids;
+ bus_expire_timeout_set_interval (connections->expire_timeout,
+ next_interval);
+}
+
+static dbus_bool_t
+expire_incomplete_timeout (void *data)
+{
+ BusConnections *connections = data;
+
+ _dbus_verbose ("Running\n");
+
+ /* note that this may remove the timeout */
+ bus_connections_expire_incomplete (connections);
return TRUE;
}
dbus_bool_t
-bus_connection_is_in_group (DBusConnection *connection,
- unsigned long gid)
+bus_connection_get_unix_groups (DBusConnection *connection,
+ unsigned long **groups,
+ int *n_groups,
+ DBusError *error)
+{
+ unsigned long uid;
+
+ *groups = NULL;
+ *n_groups = 0;
+
+ if (dbus_connection_get_unix_user (connection, &uid))
+ {
+ if (!_dbus_unix_groups_from_uid (uid, groups, n_groups))
+ {
+ _dbus_verbose ("Did not get any groups for UID %lu\n",
+ uid);
+ return FALSE;
+ }
+ else
+ {
+ _dbus_verbose ("Got %d groups for UID %lu\n",
+ *n_groups, uid);
+ return TRUE;
+ }
+ }
+ else
+ return TRUE; /* successfully got 0 groups */
+}
+
+dbus_bool_t
+bus_connection_is_in_unix_group (DBusConnection *connection,
+ unsigned long gid)
{
int i;
- const unsigned long *group_ids;
+ unsigned long *group_ids;
int n_group_ids;
- if (!bus_connection_get_groups (connection, &group_ids, &n_group_ids))
+ if (!bus_connection_get_unix_groups (connection, &group_ids, &n_group_ids,
+ NULL))
return FALSE;
i = 0;
while (i < n_group_ids)
{
if (group_ids[i] == gid)
- return TRUE;
+ {
+ dbus_free (group_ids);
+ return TRUE;
+ }
++i;
}
+ dbus_free (group_ids);
return FALSE;
}
-BusPolicy*
+const char *
+bus_connection_get_loginfo (DBusConnection *connection)
+{
+ BusConnectionData *d;
+
+ d = BUS_CONNECTION_DATA (connection);
+
+ if (!bus_connection_is_active (connection))
+ return "inactive";
+ return d->cached_loginfo_string;
+}
+
+BusClientPolicy*
bus_connection_get_policy (DBusConnection *connection)
{
BusConnectionData *d;
d = BUS_CONNECTION_DATA (connection);
_dbus_assert (d != NULL);
-
- if (!dbus_connection_get_is_authenticated (connection))
- {
- _dbus_verbose ("Tried to get policy for unauthenticated connection!\n");
- return NULL;
- }
+ _dbus_assert (d->policy != NULL);
- /* We do lazy creation of the policy because
- * it can only be done post-authentication.
- */
- if (d->policy == NULL)
- {
- d->policy =
- bus_context_create_connection_policy (d->connections->context,
- connection);
-
- /* we may have a NULL policy on OOM or error getting list of
- * groups for a user. In the latter case we don't handle it so
- * well currently, just keep pretending we're out of memory,
- * which is kind of bizarre.
- */
- }
-
return d->policy;
}
+static dbus_bool_t
+foreach_active (BusConnections *connections,
+ BusConnectionForeachFunction function,
+ void *data)
+{
+ DBusList *link;
+
+ link = _dbus_list_get_first_link (&connections->completed);
+ while (link != NULL)
+ {
+ DBusConnection *connection = link->data;
+ DBusList *next = _dbus_list_get_next_link (&connections->completed, link);
+
+ if (!(* function) (connection, data))
+ return FALSE;
+
+ link = next;
+ }
+
+ return TRUE;
+}
+
+static dbus_bool_t
+foreach_inactive (BusConnections *connections,
+ BusConnectionForeachFunction function,
+ void *data)
+{
+ DBusList *link;
+
+ link = _dbus_list_get_first_link (&connections->incomplete);
+ while (link != NULL)
+ {
+ DBusConnection *connection = link->data;
+ DBusList *next = _dbus_list_get_next_link (&connections->incomplete, link);
+
+ if (!(* function) (connection, data))
+ return FALSE;
+
+ link = next;
+ }
+
+ return TRUE;
+}
+
+/**
+ * Calls function on each active connection; if the function returns
+ * #FALSE, stops iterating. Active connections are authenticated
+ * and have sent a Hello message.
+ *
+ * @param connections the connections object
+ * @param function the function
+ * @param data data to pass to it as a second arg
+ */
+void
+bus_connections_foreach_active (BusConnections *connections,
+ BusConnectionForeachFunction function,
+ void *data)
+{
+ foreach_active (connections, function, data);
+}
+
/**
* Calls function on each connection; if the function returns
* #FALSE, stops iterating.
void
bus_connections_foreach (BusConnections *connections,
BusConnectionForeachFunction function,
- void *data)
+ void *data)
{
- DBusList *link;
-
- link = _dbus_list_get_first_link (&connections->list);
- while (link != NULL)
- {
- DBusConnection *connection = link->data;
- DBusList *next = _dbus_list_get_next_link (&connections->list, link);
+ if (!foreach_active (connections, function, data))
+ return;
- if (!(* function) (connection, data))
- break;
-
- link = next;
- }
+ foreach_inactive (connections, function, data);
+}
+
+#ifdef ENABLE_KDBUS_TRANSPORT
+DBusConnection*
+bus_connections_find_conn_by_name(BusConnections *connections, const char* name)
+{
+ DBusList *link;
+
+ link = _dbus_list_get_first_link (&connections->completed);
+ while (link != NULL)
+ {
+ DBusConnection *connection = link->data;
+ DBusList *next = _dbus_list_get_next_link (&connections->completed, link);
+
+ if (!strcmp(bus_connection_get_name(connection), name))
+ return connection;
+
+ link = next;
+ }
+
+ return NULL;
}
+#endif
BusContext*
bus_connections_get_context (BusConnections *connections)
return connections->context;
}
+/*
+ * This is used to avoid covering the same connection twice when
+ * traversing connections. Note that it assumes we will
+ * bus_connection_mark_stamp() each connection at least once per
+ * INT_MAX increments of the global stamp, or wraparound would break
+ * things.
+ */
+void
+bus_connections_increment_stamp (BusConnections *connections)
+{
+ connections->stamp += 1;
+}
+
+/* Mark connection with current stamp, return TRUE if it
+ * didn't already have that stamp
+ */
+dbus_bool_t
+bus_connection_mark_stamp (DBusConnection *connection)
+{
+ BusConnectionData *d;
+
+ d = BUS_CONNECTION_DATA (connection);
+
+ _dbus_assert (d != NULL);
+
+ if (d->stamp == d->connections->stamp)
+ return FALSE;
+ else
+ {
+ d->stamp = d->connections->stamp;
+ return TRUE;
+ }
+}
+
BusContext*
bus_connection_get_context (DBusConnection *connection)
{
_dbus_assert (d != NULL);
- return bus_context_get_registry (d->connections->context);
+ return bus_context_get_registry (d->connections->context);
+}
+
+BusActivation*
+bus_connection_get_activation (DBusConnection *connection)
+{
+ BusConnectionData *d;
+
+ d = BUS_CONNECTION_DATA (connection);
+
+ _dbus_assert (d != NULL);
+
+ return bus_context_get_activation (d->connections->context);
+}
+
+BusMatchmaker*
+bus_connection_get_matchmaker (DBusConnection *connection)
+{
+ BusConnectionData *d;
+
+ d = BUS_CONNECTION_DATA (connection);
+
+ _dbus_assert (d != NULL);
+
+ return bus_context_get_matchmaker (d->connections->context);
+}
+
+BusSELinuxID*
+bus_connection_get_selinux_id (DBusConnection *connection)
+{
+ BusConnectionData *d;
+
+ d = BUS_CONNECTION_DATA (connection);
+
+ _dbus_assert (d != NULL);
+
+ return d->selinux_id;
+}
+
+/**
+ * Checks whether the connection is registered with the message bus.
+ *
+ * @param connection the connection
+ * @returns #TRUE if we're an active message bus participant
+ */
+dbus_bool_t
+bus_connection_is_active (DBusConnection *connection)
+{
+ BusConnectionData *d;
+
+ d = BUS_CONNECTION_DATA (connection);
+
+ return d != NULL && d->name != NULL;
+}
+
+dbus_bool_t
+bus_connection_preallocate_oom_error (DBusConnection *connection)
+{
+ DBusMessage *message;
+ DBusPreallocatedSend *preallocated;
+ BusConnectionData *d;
+
+ d = BUS_CONNECTION_DATA (connection);
+
+ _dbus_assert (d != NULL);
+
+ if (d->oom_preallocated != NULL)
+ return TRUE;
+
+ preallocated = dbus_connection_preallocate_send (connection);
+ if (preallocated == NULL)
+ return FALSE;
+
+ message = dbus_message_new (DBUS_MESSAGE_TYPE_ERROR);
+
+ if (message == NULL)
+ {
+ dbus_connection_free_preallocated_send (connection, preallocated);
+ return FALSE;
+ }
+
+ /* d->name may be NULL, but that is OK */
+ if (!dbus_message_set_error_name (message, DBUS_ERROR_NO_MEMORY) ||
+ !dbus_message_set_destination (message, d->name) ||
+ !dbus_message_set_sender (message,
+ DBUS_SERVICE_DBUS))
+ {
+ dbus_connection_free_preallocated_send (connection, preallocated);
+ dbus_message_unref (message);
+ return FALSE;
+ }
+
+ /* set reply serial to placeholder value just so space is already allocated
+ * for it.
+ */
+ if (!dbus_message_set_reply_serial (message, 14))
+ {
+ dbus_connection_free_preallocated_send (connection, preallocated);
+ dbus_message_unref (message);
+ return FALSE;
+ }
+
+ d->oom_message = message;
+ d->oom_preallocated = preallocated;
+
+ return TRUE;
+}
+
+void
+bus_connection_send_oom_error (DBusConnection *connection,
+ DBusMessage *in_reply_to)
+{
+ BusConnectionData *d;
+
+ d = BUS_CONNECTION_DATA (connection);
+
+ _dbus_assert (d != NULL);
+ _dbus_assert (d->oom_message != NULL);
+
+ /* should always succeed since we set it to a placeholder earlier */
+ if (!dbus_message_set_reply_serial (d->oom_message,
+ dbus_message_get_serial (in_reply_to)))
+ _dbus_assert_not_reached ("Failed to set reply serial for preallocated oom message");
+
+ _dbus_assert (dbus_message_get_sender (d->oom_message) != NULL);
+
+ dbus_connection_send_preallocated (connection, d->oom_preallocated,
+ d->oom_message, NULL);
+
+ dbus_message_unref (d->oom_message);
+ d->oom_message = NULL;
+ d->oom_preallocated = NULL;
+}
+
+#ifdef DBUS_ENABLE_STATS
+static void
+update_peak (int *peak,
+ int n)
+{
+ if (*peak < n)
+ *peak = n;
+}
+#endif
+
+void
+bus_connection_add_match_rule_link (DBusConnection *connection,
+ DBusList *link)
+{
+ BusConnectionData *d;
+
+ d = BUS_CONNECTION_DATA (connection);
+ _dbus_assert (d != NULL);
+
+ _dbus_list_append_link (&d->match_rules, link);
+
+ d->n_match_rules += 1;
+
+#ifdef DBUS_ENABLE_STATS
+ update_peak (&d->peak_match_rules, d->n_match_rules);
+ update_peak (&d->connections->peak_match_rules_per_conn, d->n_match_rules);
+
+ d->connections->total_match_rules += 1;
+ update_peak (&d->connections->peak_match_rules,
+ d->connections->total_match_rules);
+#endif
+}
+
+dbus_bool_t
+bus_connection_add_match_rule (DBusConnection *connection,
+ BusMatchRule *rule)
+{
+ DBusList *link;
+
+ link = _dbus_list_alloc_link (rule);
+
+ if (link == NULL)
+ return FALSE;
+
+ bus_connection_add_match_rule_link (connection, link);
+
+ return TRUE;
+}
+
+void
+bus_connection_remove_match_rule (DBusConnection *connection,
+ BusMatchRule *rule)
+{
+ BusConnectionData *d;
+
+ d = BUS_CONNECTION_DATA (connection);
+ _dbus_assert (d != NULL);
+
+ _dbus_list_remove_last (&d->match_rules, rule);
+
+ d->n_match_rules -= 1;
+ _dbus_assert (d->n_match_rules >= 0);
+
+#ifdef DBUS_ENABLE_STATS
+ d->connections->total_match_rules -= 1;
+#endif
+}
+
+int
+bus_connection_get_n_match_rules (DBusConnection *connection)
+{
+ BusConnectionData *d;
+
+ d = BUS_CONNECTION_DATA (connection);
+ _dbus_assert (d != NULL);
+
+ return d->n_match_rules;
+}
+
+void
+bus_connection_add_owned_service_link (DBusConnection *connection,
+ DBusList *link)
+{
+ BusConnectionData *d;
+
+ d = BUS_CONNECTION_DATA (connection);
+ _dbus_assert (d != NULL);
+
+ _dbus_list_append_link (&d->services_owned, link);
+
+ d->n_services_owned += 1;
+
+#ifdef DBUS_ENABLE_STATS
+ update_peak (&d->peak_bus_names, d->n_services_owned);
+ update_peak (&d->connections->peak_bus_names_per_conn,
+ d->n_services_owned);
+
+ d->connections->total_bus_names += 1;
+ update_peak (&d->connections->peak_bus_names,
+ d->connections->total_bus_names);
+#endif
+}
+
+dbus_bool_t
+bus_connection_add_owned_service (DBusConnection *connection,
+ BusService *service)
+{
+ DBusList *link;
+
+ link = _dbus_list_alloc_link (service);
+
+ if (link == NULL)
+ return FALSE;
+
+ bus_connection_add_owned_service_link (connection, link);
+
+ return TRUE;
+}
+
+void
+bus_connection_remove_owned_service (DBusConnection *connection,
+ BusService *service)
+{
+ BusConnectionData *d;
+
+ d = BUS_CONNECTION_DATA (connection);
+ _dbus_assert (d != NULL);
+
+ _dbus_list_remove_last (&d->services_owned, service);
+
+ d->n_services_owned -= 1;
+ _dbus_assert (d->n_services_owned >= 0);
+
+#ifdef DBUS_ENABLE_STATS
+ d->connections->total_bus_names -= 1;
+#endif
+}
+
+int
+bus_connection_get_n_services_owned (DBusConnection *connection)
+{
+ BusConnectionData *d;
+
+ d = BUS_CONNECTION_DATA (connection);
+ _dbus_assert (d != NULL);
+
+ return d->n_services_owned;
+}
+
+#ifdef ENABLE_KDBUS_TRANSPORT
+DBusList**
+bus_connection_get_services_owned (DBusConnection *connection)
+{
+ BusConnectionData *d;
+ d = BUS_CONNECTION_DATA (connection);
+ _dbus_assert (d != NULL);
+
+ return &d->services_owned;
+}
+#endif
+
+dbus_bool_t
+bus_connection_complete (DBusConnection *connection,
+ const DBusString *name,
+ DBusError *error)
+{
+ BusConnectionData *d;
+ unsigned long uid;
+
+ d = BUS_CONNECTION_DATA (connection);
+ _dbus_assert (d != NULL);
+ _dbus_assert (d->name == NULL);
+ _dbus_assert (d->policy == NULL);
+
+ _dbus_assert (!bus_connection_is_active (connection));
+
+ if (!_dbus_string_copy_data (name, &d->name))
+ {
+ BUS_SET_OOM (error);
+ return FALSE;
+ }
+
+ _dbus_assert (d->name != NULL);
+
+ _dbus_verbose ("Name %s assigned to %p\n", d->name, connection);
+
+ d->policy = bus_context_create_client_policy (d->connections->context,
+ connection,
+ error);
+
+ /* we may have a NULL policy on OOM or error getting list of
+ * groups for a user. In the latter case we don't handle it so
+ * well currently, as it will just keep failing over and over.
+ */
+
+ if (d->policy == NULL)
+ {
+ _dbus_verbose ("Failed to create security policy for connection %p\n",
+ connection);
+ _DBUS_ASSERT_ERROR_IS_SET (error);
+ dbus_free (d->name);
+ d->name = NULL;
+ return FALSE;
+ }
+
+ if (dbus_connection_get_unix_user (connection, &uid))
+ {
+ if (!adjust_connections_for_uid (d->connections,
+ uid, 1))
+ goto fail;
+ }
+
+ /* Create and cache a string which holds information about the
+ * peer process; used for logging purposes.
+ */
+ if (!cache_peer_loginfo_string (d, connection))
+ goto fail;
+
+ /* Now the connection is active, move it between lists */
+ _dbus_list_unlink (&d->connections->incomplete,
+ d->link_in_connection_list);
+ d->connections->n_incomplete -= 1;
+ _dbus_list_append_link (&d->connections->completed,
+ d->link_in_connection_list);
+ d->connections->n_completed += 1;
+
+ _dbus_assert (d->connections->n_incomplete >= 0);
+ _dbus_assert (d->connections->n_completed > 0);
+
+ /* See if we can remove the timeout */
+ bus_connections_expire_incomplete (d->connections);
+
+ _dbus_assert (bus_connection_is_active (connection));
+
+ return TRUE;
+fail:
+ BUS_SET_OOM (error);
+ dbus_free (d->name);
+ d->name = NULL;
+ if (d->policy)
+ bus_client_policy_unref (d->policy);
+ d->policy = NULL;
+ return FALSE;
+}
+
+const char *
+bus_connection_get_name (DBusConnection *connection)
+{
+ BusConnectionData *d;
+
+ d = BUS_CONNECTION_DATA (connection);
+ _dbus_assert (d != NULL);
+
+ return d->name;
+}
+
+/**
+ * Check whether completing the passed-in connection would
+ * exceed limits, and if so set error and return #FALSE
+ */
+dbus_bool_t
+bus_connections_check_limits (BusConnections *connections,
+ DBusConnection *requesting_completion,
+ DBusError *error)
+{
+ unsigned long uid;
+
+ if (connections->n_completed >=
+ bus_context_get_max_completed_connections (connections->context))
+ {
+ dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
+ "The maximum number of active connections has been reached");
+ return FALSE;
+ }
+
+ if (dbus_connection_get_unix_user (requesting_completion, &uid))
+ {
+ if (get_connections_for_uid (connections, uid) >=
+ bus_context_get_max_connections_per_user (connections->context))
+ {
+ dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
+ "The maximum number of active connections for UID %lu has been reached",
+ uid);
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+
+static void
+bus_pending_reply_free (BusPendingReply *pending)
+{
+ _dbus_verbose ("Freeing pending reply %p, replier %p receiver %p serial %u\n",
+ pending,
+ pending->will_send_reply,
+ pending->will_get_reply,
+ pending->reply_serial);
+
+ dbus_free (pending);
+}
+
+static dbus_bool_t
+bus_pending_reply_send_no_reply (BusConnections *connections,
+ BusTransaction *transaction,
+ BusPendingReply *pending)
+{
+ DBusMessage *message;
+ DBusMessageIter iter;
+ dbus_bool_t retval;
+ const char *errmsg;
+
+ retval = FALSE;
+
+ message = dbus_message_new (DBUS_MESSAGE_TYPE_ERROR);
+ if (message == NULL)
+ return FALSE;
+
+ dbus_message_set_no_reply (message, TRUE);
+
+ if (!dbus_message_set_reply_serial (message,
+ pending->reply_serial))
+ goto out;
+
+ if (!dbus_message_set_error_name (message,
+ DBUS_ERROR_NO_REPLY))
+ goto out;
+
+ errmsg = "Message did not receive a reply (timeout by message bus)";
+ dbus_message_iter_init_append (message, &iter);
+ if (!dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &errmsg))
+ goto out;
+
+ if (!bus_transaction_send_from_driver (transaction, pending->will_get_reply,
+ message))
+ goto out;
+
+ retval = TRUE;
+
+ out:
+ dbus_message_unref (message);
+ return retval;
+}
+
+static dbus_bool_t
+bus_pending_reply_expired (BusExpireList *list,
+ DBusList *link,
+ void *data)
+{
+ BusPendingReply *pending = link->data;
+ BusConnections *connections = data;
+ BusTransaction *transaction;
+
+ /* No reply is forthcoming. So nuke it if we can. If not,
+ * leave it in the list to try expiring again later when we
+ * get more memory.
+ */
+
+ _dbus_verbose ("Expiring pending reply %p, replier %p receiver %p serial %u\n",
+ pending,
+ pending->will_send_reply,
+ pending->will_get_reply,
+ pending->reply_serial);
+
+ transaction = bus_transaction_new (connections->context);
+ if (transaction == NULL)
+ return FALSE;
+
+ if (!bus_pending_reply_send_no_reply (connections,
+ transaction,
+ pending))
+ {
+ bus_transaction_cancel_and_free (transaction);
+ return FALSE;
+ }
+
+ bus_expire_list_remove_link (connections->pending_replies, link);
+
+ bus_pending_reply_free (pending);
+ bus_transaction_execute_and_free (transaction);
+
+ return TRUE;
+}
+
+static void
+bus_connection_drop_pending_replies (BusConnections *connections,
+ DBusConnection *connection)
+{
+ /* The DBusConnection is almost 100% finalized here, so you can't
+ * do anything with it except check for pointer equality
+ */
+ DBusList *link;
+
+ _dbus_verbose ("Dropping pending replies that involve connection %p\n",
+ connection);
+
+ link = bus_expire_list_get_first_link (connections->pending_replies);
+ while (link != NULL)
+ {
+ DBusList *next;
+ BusPendingReply *pending;
+
+ next = bus_expire_list_get_next_link (connections->pending_replies,
+ link);
+ pending = link->data;
+
+ if (pending->will_get_reply == connection)
+ {
+ /* We don't need to track this pending reply anymore */
+
+ _dbus_verbose ("Dropping pending reply %p, replier %p receiver %p serial %u\n",
+ pending,
+ pending->will_send_reply,
+ pending->will_get_reply,
+ pending->reply_serial);
+
+ bus_expire_list_remove_link (connections->pending_replies,
+ link);
+ bus_pending_reply_free (pending);
+ }
+ else if (pending->will_send_reply == connection)
+ {
+ /* The reply isn't going to be sent, so set things
+ * up so it will be expired right away
+ */
+ _dbus_verbose ("Will expire pending reply %p, replier %p receiver %p serial %u\n",
+ pending,
+ pending->will_send_reply,
+ pending->will_get_reply,
+ pending->reply_serial);
+
+ pending->will_send_reply = NULL;
+ pending->expire_item.added_tv_sec = 0;
+ pending->expire_item.added_tv_usec = 0;
+
+ bus_expire_list_recheck_immediately (connections->pending_replies);
+ }
+
+ link = next;
+ }
}
-BusActivation*
-bus_connection_get_activation (DBusConnection *connection)
+
+typedef struct
{
- BusConnectionData *d;
+ BusPendingReply *pending;
+ BusConnections *connections;
+} CancelPendingReplyData;
- d = BUS_CONNECTION_DATA (connection);
+static void
+cancel_pending_reply (void *data)
+{
+ CancelPendingReplyData *d = data;
- _dbus_assert (d != NULL);
+ _dbus_verbose ("d = %p\n", d);
+
+ if (!bus_expire_list_remove (d->connections->pending_replies,
+ &d->pending->expire_item))
+ _dbus_assert_not_reached ("pending reply did not exist to be cancelled");
- return bus_context_get_activation (d->connections->context);
+ bus_pending_reply_free (d->pending); /* since it's been cancelled */
}
-/**
- * Checks whether the connection is registered with the message bus.
- *
- * @param connection the connection
- * @returns #TRUE if we're an active message bus participant
- */
-dbus_bool_t
-bus_connection_is_active (DBusConnection *connection)
+static void
+cancel_pending_reply_data_free (void *data)
{
- BusConnectionData *d;
+ CancelPendingReplyData *d = data;
- d = BUS_CONNECTION_DATA (connection);
+ _dbus_verbose ("d = %p\n", d);
- return d != NULL && d->name != NULL;
+ /* d->pending should be either freed or still
+ * in the list of pending replies (owned by someone
+ * else)
+ */
+
+ dbus_free (d);
}
+/*
+ * Record that a reply is allowed; return TRUE on success.
+ */
dbus_bool_t
-bus_connection_preallocate_oom_error (DBusConnection *connection)
+bus_connections_expect_reply (BusConnections *connections,
+ BusTransaction *transaction,
+ DBusConnection *will_get_reply,
+ DBusConnection *will_send_reply,
+ DBusMessage *reply_to_this,
+ DBusError *error)
{
- DBusMessage *message;
- DBusPreallocatedSend *preallocated;
- BusConnectionData *d;
+ BusPendingReply *pending;
+ dbus_uint32_t reply_serial;
+ DBusList *link;
+ CancelPendingReplyData *cprd;
+ int count;
- d = BUS_CONNECTION_DATA (connection);
+ _dbus_assert (will_get_reply != NULL);
+ _dbus_assert (will_send_reply != NULL);
+ _dbus_assert (reply_to_this != NULL);
+
+ if (dbus_message_get_no_reply (reply_to_this))
+ return TRUE; /* we won't allow a reply, since client doesn't care for one. */
+
+ reply_serial = dbus_message_get_serial (reply_to_this);
- _dbus_assert (d != NULL);
+ link = bus_expire_list_get_first_link (connections->pending_replies);
+ count = 0;
+ while (link != NULL)
+ {
+ pending = link->data;
- if (d->oom_preallocated != NULL)
- return TRUE;
+ if (pending->reply_serial == reply_serial &&
+ pending->will_get_reply == will_get_reply &&
+ pending->will_send_reply == will_send_reply)
+ {
+ dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
+ "Message has the same reply serial as a currently-outstanding existing method call");
+ return FALSE;
+ }
+
+ link = bus_expire_list_get_next_link (connections->pending_replies,
+ link);
+ if (pending->will_get_reply == will_get_reply)
+ ++count;
+ }
- preallocated = dbus_connection_preallocate_send (connection);
- if (preallocated == NULL)
- return FALSE;
+ if (count >=
+ bus_context_get_max_replies_per_connection (connections->context))
+ {
+ dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
+ "The maximum number of pending replies per connection has been reached");
+ return FALSE;
+ }
- /* d->name may be NULL, but that should be OK */
- message = dbus_message_new (d->name,
- DBUS_ERROR_NO_MEMORY);
- if (message == NULL)
+ pending = dbus_new0 (BusPendingReply, 1);
+ if (pending == NULL)
{
- dbus_connection_free_preallocated_send (connection, preallocated);
+ BUS_SET_OOM (error);
return FALSE;
}
- dbus_message_set_is_error (message, TRUE);
+#ifdef DBUS_ENABLE_VERBOSE_MODE
+ /* so we can see a not-yet-added pending reply */
+ pending->expire_item.added_tv_sec = 1;
+ pending->expire_item.added_tv_usec = 1;
+#endif
- if (!dbus_message_set_sender (message,
- DBUS_SERVICE_DBUS))
+ pending->will_get_reply = will_get_reply;
+ pending->will_send_reply = will_send_reply;
+ pending->reply_serial = reply_serial;
+
+ cprd = dbus_new0 (CancelPendingReplyData, 1);
+ if (cprd == NULL)
{
- dbus_connection_free_preallocated_send (connection, preallocated);
- dbus_message_unref (message);
+ BUS_SET_OOM (error);
+ bus_pending_reply_free (pending);
return FALSE;
}
- /* set reply serial to placeholder value just so space is already allocated
- * for it.
- */
- if (!dbus_message_set_reply_serial (message, 14))
+ if (!bus_expire_list_add (connections->pending_replies,
+ &pending->expire_item))
{
- dbus_connection_free_preallocated_send (connection, preallocated);
- dbus_message_unref (message);
+ BUS_SET_OOM (error);
+ dbus_free (cprd);
+ bus_pending_reply_free (pending);
return FALSE;
}
- d->oom_message = message;
- d->oom_preallocated = preallocated;
+ if (!bus_transaction_add_cancel_hook (transaction,
+ cancel_pending_reply,
+ cprd,
+ cancel_pending_reply_data_free))
+ {
+ BUS_SET_OOM (error);
+ bus_expire_list_remove (connections->pending_replies, &pending->expire_item);
+ dbus_free (cprd);
+ bus_pending_reply_free (pending);
+ return FALSE;
+ }
+
+ cprd->pending = pending;
+ cprd->connections = connections;
+
+ _dbus_get_monotonic_time (&pending->expire_item.added_tv_sec,
+ &pending->expire_item.added_tv_usec);
+
+ _dbus_verbose ("Added pending reply %p, replier %p receiver %p serial %u\n",
+ pending,
+ pending->will_send_reply,
+ pending->will_get_reply,
+ pending->reply_serial);
return TRUE;
}
-void
-bus_connection_send_oom_error (DBusConnection *connection,
- DBusMessage *in_reply_to)
+typedef struct
{
- BusConnectionData *d;
+ DBusList *link;
+ BusConnections *connections;
+} CheckPendingReplyData;
- d = BUS_CONNECTION_DATA (connection);
+static void
+cancel_check_pending_reply (void *data)
+{
+ CheckPendingReplyData *d = data;
- _dbus_assert (d != NULL);
- _dbus_assert (d->oom_message != NULL);
+ _dbus_verbose ("d = %p\n",d);
- /* should always succeed since we set it to a placeholder earlier */
- if (!dbus_message_set_reply_serial (d->oom_message,
- dbus_message_get_serial (in_reply_to)))
- _dbus_assert_not_reached ("Failed to set reply serial for preallocated oom message");
+ bus_expire_list_add_link (d->connections->pending_replies,
+ d->link);
+ d->link = NULL;
+}
- _dbus_assert (dbus_message_get_sender (d->oom_message) != NULL);
-
- dbus_connection_send_preallocated (connection, d->oom_preallocated,
- d->oom_message, NULL);
+static void
+check_pending_reply_data_free (void *data)
+{
+ CheckPendingReplyData *d = data;
- dbus_message_unref (d->oom_message);
- d->oom_message = NULL;
- d->oom_preallocated = NULL;
+ _dbus_verbose ("d = %p\n",d);
+
+ if (d->link != NULL)
+ {
+ BusPendingReply *pending = d->link->data;
+
+ _dbus_assert (!bus_expire_list_contains_item (d->connections->pending_replies,
+ &pending->expire_item));
+
+ bus_pending_reply_free (pending);
+ _dbus_list_free_link (d->link);
+ }
+
+ dbus_free (d);
}
+/*
+ * Check whether a reply is allowed, remove BusPendingReply
+ * if so, return TRUE if so.
+ */
dbus_bool_t
-bus_connection_add_owned_service (DBusConnection *connection,
- BusService *service)
+bus_connections_check_reply (BusConnections *connections,
+ BusTransaction *transaction,
+ DBusConnection *sending_reply,
+ DBusConnection *receiving_reply,
+ DBusMessage *reply,
+ DBusError *error)
{
- BusConnectionData *d;
-
- d = BUS_CONNECTION_DATA (connection);
- _dbus_assert (d != NULL);
+ CheckPendingReplyData *cprd;
+ DBusList *link;
+ dbus_uint32_t reply_serial;
+
+ _dbus_assert (sending_reply != NULL);
+ _dbus_assert (receiving_reply != NULL);
- if (!_dbus_list_append (&d->services_owned,
- service))
- return FALSE;
+ reply_serial = dbus_message_get_reply_serial (reply);
- return TRUE;
-}
+ link = bus_expire_list_get_first_link (connections->pending_replies);
+ while (link != NULL)
+ {
+ BusPendingReply *pending = link->data;
-void
-bus_connection_remove_owned_service (DBusConnection *connection,
- BusService *service)
-{
- BusConnectionData *d;
+ if (pending->reply_serial == reply_serial &&
+ pending->will_get_reply == receiving_reply &&
+ pending->will_send_reply == sending_reply)
+ {
+ _dbus_verbose ("Found pending reply with serial %u\n", reply_serial);
+ break;
+ }
+
+ link = bus_expire_list_get_next_link (connections->pending_replies,
+ link);
+ }
- d = BUS_CONNECTION_DATA (connection);
- _dbus_assert (d != NULL);
+ if (link == NULL)
+ {
+ _dbus_verbose ("No pending reply expected\n");
- _dbus_list_remove_last (&d->services_owned, service);
-}
+ return FALSE;
+ }
-dbus_bool_t
-bus_connection_set_name (DBusConnection *connection,
- const DBusString *name)
-{
- BusConnectionData *d;
+ cprd = dbus_new0 (CheckPendingReplyData, 1);
+ if (cprd == NULL)
+ {
+ BUS_SET_OOM (error);
+ return FALSE;
+ }
- d = BUS_CONNECTION_DATA (connection);
- _dbus_assert (d != NULL);
- _dbus_assert (d->name == NULL);
-
- if (!_dbus_string_copy_data (name, &d->name))
- return FALSE;
+ if (!bus_transaction_add_cancel_hook (transaction,
+ cancel_check_pending_reply,
+ cprd,
+ check_pending_reply_data_free))
+ {
+ BUS_SET_OOM (error);
+ dbus_free (cprd);
+ return FALSE;
+ }
- _dbus_assert (d->name != NULL);
+ cprd->link = link;
+ cprd->connections = connections;
- _dbus_verbose ("Name %s assigned to %p\n", d->name, connection);
+ bus_expire_list_unlink (connections->pending_replies,
+ link);
+ _dbus_assert (!bus_expire_list_contains_item (connections->pending_replies, link->data));
+
return TRUE;
}
-const char *
-bus_connection_get_name (DBusConnection *connection)
-{
- BusConnectionData *d;
-
- d = BUS_CONNECTION_DATA (connection);
- _dbus_assert (d != NULL);
-
- return d->name;
-}
+/*
+ * Transactions
+ *
+ * Note that this is fairly fragile; in particular, don't try to use
+ * one transaction across any main loop iterations.
+ */
typedef struct
{
DBusPreallocatedSend *preallocated;
} MessageToSend;
+typedef struct
+{
+ BusTransactionCancelFunction cancel_function;
+ DBusFreeFunction free_data_function;
+ void *data;
+} CancelHook;
+
struct BusTransaction
{
DBusList *connections;
BusContext *context;
+ DBusList *cancel_hooks;
};
static void
dbus_free (to_send);
}
+static void
+cancel_hook_cancel (void *element,
+ void *data)
+{
+ CancelHook *ch = element;
+
+ _dbus_verbose ("Running transaction cancel hook\n");
+
+ if (ch->cancel_function)
+ (* ch->cancel_function) (ch->data);
+}
+
+static void
+cancel_hook_free (void *element,
+ void *data)
+{
+ CancelHook *ch = element;
+
+ if (ch->free_data_function)
+ (* ch->free_data_function) (ch->data);
+
+ dbus_free (ch);
+}
+
+static void
+free_cancel_hooks (BusTransaction *transaction)
+{
+ _dbus_list_foreach (&transaction->cancel_hooks,
+ cancel_hook_free, NULL);
+
+ _dbus_list_clear (&transaction->cancel_hooks);
+}
+
BusTransaction*
bus_transaction_new (BusContext *context)
{
}
dbus_bool_t
-bus_transaction_send_message (BusTransaction *transaction,
- DBusConnection *connection,
- DBusMessage *message)
+bus_transaction_send_from_driver (BusTransaction *transaction,
+ DBusConnection *connection,
+ DBusMessage *message)
+{
+ /* We have to set the sender to the driver, and have
+ * to check security policy since it was not done in
+ * dispatch.c
+ */
+ _dbus_verbose ("Sending %s %s %s from driver\n",
+ dbus_message_get_interface (message) ?
+ dbus_message_get_interface (message) : "(no interface)",
+ dbus_message_get_member (message) ?
+ dbus_message_get_member (message) : "(no member)",
+ dbus_message_get_error_name (message) ?
+ dbus_message_get_error_name (message) : "(no error name)");
+
+ if (!dbus_message_set_sender (message, DBUS_SERVICE_DBUS))
+ return FALSE;
+
+#ifdef ENABLE_KDBUS_TRANSPORT
+ if(!bus_context_is_kdbus(bus_transaction_get_context (transaction))) /* we can't set destination on the basis of connection when on kdbus*/
+#endif
+ if (bus_connection_is_active (connection))
+ {
+ if (!dbus_message_set_destination (message,
+ bus_connection_get_name (connection)))
+ return FALSE;
+ }
+
+ /* bus driver never wants a reply */
+ dbus_message_set_no_reply (message, TRUE);
+
+ /* If security policy doesn't allow the message, we silently
+ * eat it; the driver doesn't care about getting a reply.
+ */
+ if (!bus_context_check_security_policy (bus_transaction_get_context (transaction),
+ transaction,
+ NULL, connection, connection, message, NULL))
+ return TRUE;
+
+ return bus_transaction_send (transaction, connection, message);
+}
+
+dbus_bool_t
+bus_transaction_send (BusTransaction *transaction,
+ DBusConnection *connection,
+ DBusMessage *message)
{
MessageToSend *to_send;
BusConnectionData *d;
DBusList *link;
- _dbus_verbose (" trying to add message %s to transaction%s\n",
- dbus_message_get_name (message),
+ _dbus_verbose (" trying to add %s interface=%s member=%s error=%s to transaction%s\n",
+ dbus_message_get_type (message) == DBUS_MESSAGE_TYPE_ERROR ? "error" :
+ dbus_message_get_reply_serial (message) != 0 ? "reply" :
+ "message",
+ dbus_message_get_interface (message) ?
+ dbus_message_get_interface (message) : "(unset)",
+ dbus_message_get_member (message) ?
+ dbus_message_get_member (message) : "(unset)",
+ dbus_message_get_error_name (message) ?
+ dbus_message_get_error_name (message) : "(unset)",
dbus_connection_get_is_connected (connection) ?
"" : " (disconnected)");
_dbus_assert (transaction->connections == NULL);
+ _dbus_list_foreach (&transaction->cancel_hooks,
+ cancel_hook_cancel, NULL);
+
+ free_cancel_hooks (transaction);
+
dbus_free (transaction);
}
_dbus_assert (transaction->connections == NULL);
+ free_cancel_hooks (transaction);
+
dbus_free (transaction);
}
_dbus_assert (error != NULL);
_DBUS_ASSERT_ERROR_IS_SET (error);
- reply = dbus_message_new_error_reply (in_reply_to,
- error->name,
- error->message);
+ _dbus_verbose ("Sending error reply %s \"%s\"\n",
+ error->name, error->message);
+
+ reply = dbus_message_new_error (in_reply_to,
+ error->name,
+ error->message);
if (reply == NULL)
return FALSE;
- if (!dbus_message_set_sender (reply, DBUS_SERVICE_DBUS) ||
- !bus_transaction_send_message (transaction, connection, reply))
+ if (!bus_transaction_send_from_driver (transaction, connection, reply))
{
dbus_message_unref (reply);
return FALSE;
return TRUE;
}
+
+dbus_bool_t
+bus_transaction_add_cancel_hook (BusTransaction *transaction,
+ BusTransactionCancelFunction cancel_function,
+ void *data,
+ DBusFreeFunction free_data_function)
+{
+ CancelHook *ch;
+
+ ch = dbus_new (CancelHook, 1);
+ if (ch == NULL)
+ return FALSE;
+
+ _dbus_verbose (" adding cancel hook function = %p data = %p\n",
+ cancel_function, data);
+
+ ch->cancel_function = cancel_function;
+ ch->data = data;
+ ch->free_data_function = free_data_function;
+
+ /* It's important that the hooks get run in reverse order that they
+ * were added
+ */
+ if (!_dbus_list_prepend (&transaction->cancel_hooks, ch))
+ {
+ dbus_free (ch);
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+#ifdef DBUS_ENABLE_STATS
+int
+bus_connections_get_n_active (BusConnections *connections)
+{
+ return connections->n_completed;
+}
+
+int
+bus_connections_get_n_incomplete (BusConnections *connections)
+{
+ return connections->n_incomplete;
+}
+
+int
+bus_connections_get_total_match_rules (BusConnections *connections)
+{
+ return connections->total_match_rules;
+}
+
+int
+bus_connections_get_peak_match_rules (BusConnections *connections)
+{
+ return connections->peak_match_rules;
+}
+
+int
+bus_connections_get_peak_match_rules_per_conn (BusConnections *connections)
+{
+ return connections->peak_match_rules_per_conn;
+}
+
+int
+bus_connections_get_total_bus_names (BusConnections *connections)
+{
+ return connections->total_bus_names;
+}
+
+int
+bus_connections_get_peak_bus_names (BusConnections *connections)
+{
+ return connections->peak_bus_names;
+}
+
+int
+bus_connections_get_peak_bus_names_per_conn (BusConnections *connections)
+{
+ return connections->peak_bus_names_per_conn;
+}
+
+int
+bus_connection_get_peak_match_rules (DBusConnection *connection)
+{
+ BusConnectionData *d;
+
+ d = BUS_CONNECTION_DATA (connection);
+ return d->peak_match_rules;
+}
+
+int
+bus_connection_get_peak_bus_names (DBusConnection *connection)
+{
+ BusConnectionData *d;
+
+ d = BUS_CONNECTION_DATA (connection);
+ return d->peak_bus_names;
+}
+#endif /* DBUS_ENABLE_STATS */
projects / platform / upstream / dbus.git / blobdiff