#include "policy.h"
#include "services.h"
#include "utils.h"
+#include "signals.h"
+#include "expirelist.h"
#include <dbus/dbus-list.h>
+#include <dbus/dbus-hash.h>
+#include <dbus/dbus-timeout.h>
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 */
};
-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;
BusClientPolicy *policy;
+
+ 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 */
} BusConnectionData;
+static void 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_ulong (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;
+
+ current_count = get_connections_for_uid (connections, uid);
- connection_data_slot_refcount -= 1;
+ _dbus_verbose ("Adjusting connection count for UID " DBUS_UID_FORMAT
+ ": was %d adjustment %d making %d\n",
+ uid, current_count, adjustment, current_count + adjustment);
- if (connection_data_slot_refcount == 0)
+ _dbus_assert (current_count >= 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_ulong (connections->completed_by_user, uid);
+ return TRUE;
}
-}
-
-static DBusLoop*
-connection_get_loop (DBusConnection *connection)
-{
- BusConnectionData *d;
+ else
+ {
+ dbus_bool_t retval;
+
+ retval = _dbus_hash_table_insert_ulong (connections->completed_by_user,
+ uid, _DBUS_INT_TO_POINTER (current_count));
- d = BUS_CONNECTION_DATA (connection);
+ /* only positive adjustment can fail as otherwise
+ * a hash entry should already exist
+ */
+ _dbus_assert (adjustment > 0 ||
+ (adjustment <= 0 && retval));
- return bus_context_get_loop (d->connections->context);
+ return retval;
+ }
}
void
{
BusConnectionData *d;
BusService *service;
-
+ BusMatchmaker *matchmaker;
+
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)");
+
+ /* 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
* 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. Probably we need to do that though.
*/
while ((service = _dbus_list_get_last (&d->services_owned)))
{
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);
}
void *data)
{
/* FIXME this can be done in dbus-mainloop.c
- * if the code in activation.c for the babysitter
- * watch handler is fixed.
- */
+ * if the code in activation.c for the babysitter
+ * watch handler is fixed.
+ */
#if 0
_dbus_verbose ("Calling handle_watch\n");
/* 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_free (d);
}
+static void
+call_timeout_callback (DBusTimeout *timeout,
+ void *data)
+{
+ /* can return FALSE on OOM but we just let it fire again later */
+ dbus_timeout_handle (timeout);
+}
+
BusConnections*
bus_connections_new (BusContext *context)
{
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_ULONG,
+ 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,
+ call_timeout_callback, NULL, NULL))
+ 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
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_disconnect (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);
bus_connection_disconnected (connection);
dbus_connection_unref (connection);
}
+
+ _dbus_assert (connections->n_completed == 0);
+
+ _dbus_assert (connections->pending_replies->n_items == 0);
+ bus_expire_list_free (connections->pending_replies);
+
+ _dbus_loop_remove_timeout (bus_context_get_loop (connections->context),
+ connections->expire_timeout,
+ call_timeout_callback, NULL);
- _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);
}
}
d->connections = connections;
d->connection = connection;
-
+
+ _dbus_get_current_time (&d->connection_tv_sec,
+ &d->connection_tv_usec);
+
_dbus_assert (connection_data_slot >= 0);
if (!dbus_connection_set_data (connection,
NULL,
connection, NULL))
goto out;
-
-
+
dbus_connection_set_unix_user_function (connection,
allow_user_function,
NULL, NULL);
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))
- {
- bus_dispatch_remove_connection (connection);
- goto out;
- }
if (dbus_connection_get_dispatch_status (connection) != DBUS_DISPATCH_COMPLETE)
{
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_disconnect (connections->incomplete->data);
+ }
+
retval = TRUE;
out:
if (!retval)
- {
+ {
if (!dbus_connection_set_watch_functions (connection,
NULL, NULL, NULL,
connection,
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;
}
+void
+bus_connections_expire_incomplete (BusConnections *connections)
+{
+ int next_interval;
+
+ next_interval = -1;
+
+ if (connections->incomplete != NULL)
+ {
+ long tv_sec, tv_usec;
+ DBusList *link;
+ int auth_timeout;
+
+ _dbus_get_current_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)
+ {
+ 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_disconnect (connection);
+ }
+ else
+ {
+ /* 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;
+ }
+ }
+
+ 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 %s\n", _DBUS_FUNCTION_NAME);
+
+ /* note that this may remove the timeout */
+ bus_connections_expire_incomplete (connections);
+
+ return TRUE;
+}
+
dbus_bool_t
bus_connection_get_groups (DBusConnection *connection,
unsigned long **groups,
- int *n_groups)
+ int *n_groups,
+ DBusError *error)
{
BusConnectionData *d;
unsigned long uid;
{
if (!_dbus_user_database_get_groups (user_database,
uid, groups, n_groups,
- NULL))
+ error))
{
+ _DBUS_ASSERT_ERROR_IS_SET (error);
_dbus_verbose ("Did not get any groups for UID %lu\n",
uid);
return FALSE;
unsigned long *group_ids;
int n_group_ids;
- if (!bus_connection_get_groups (connection, &group_ids, &n_group_ids))
+ if (!bus_connection_get_groups (connection, &group_ids, &n_group_ids,
+ NULL))
return FALSE;
i = 0;
d = BUS_CONNECTION_DATA (connection);
_dbus_assert (d != NULL);
+ _dbus_assert (d->policy != NULL);
+
+ return d->policy;
+}
- if (!dbus_connection_get_is_authenticated (connection))
+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)
{
- _dbus_verbose ("Tried to get policy for unauthenticated connection!\n");
- return 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;
- /* We do lazy creation of the policy because
- * it can only be done post-authentication.
- */
- if (d->policy == NULL)
+ link = _dbus_list_get_first_link (&connections->incomplete);
+ while (link != NULL)
{
- d->policy =
- bus_context_create_client_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.
- */
+ DBusConnection *connection = link->data;
+ DBusList *next = _dbus_list_get_next_link (&connections->incomplete, link);
+
+ if (!(* function) (connection, data))
+ return FALSE;
+
+ link = next;
}
- return d->policy;
+ 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);
}
/**
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);
}
BusContext*
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)
{
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);
+}
+
/**
* Checks whether the connection is registered with the message bus.
*
if (preallocated == NULL)
return FALSE;
- /* d->name may be NULL, but that should be OK */
- message = dbus_message_new (d->name,
- DBUS_ERROR_NO_MEMORY);
+ message = dbus_message_new (DBUS_MESSAGE_TYPE_ERROR);
+
if (message == NULL)
{
dbus_connection_free_preallocated_send (connection, preallocated);
return FALSE;
}
- dbus_message_set_is_error (message, TRUE);
-
- if (!dbus_message_set_sender (message,
- DBUS_SERVICE_DBUS))
+ /* 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_ORG_FREEDESKTOP_DBUS))
{
dbus_connection_free_preallocated_send (connection, preallocated);
dbus_message_unref (message);
}
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;
+}
+
+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);
+}
+
+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)
{
_dbus_assert (d != NULL);
_dbus_list_append_link (&d->services_owned, link);
+
+ d->n_services_owned += 1;
}
dbus_bool_t
_dbus_assert (d != NULL);
_dbus_list_remove_last (&d->services_owned, service);
+
+ d->n_services_owned -= 1;
+ _dbus_assert (d->n_services_owned >= 0);
+}
+
+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;
}
dbus_bool_t
-bus_connection_set_name (DBusConnection *connection,
- const DBusString *name)
+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))
- return FALSE;
+ {
+ 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))
+ {
+ BUS_SET_OOM (error);
+ dbus_free (d->name);
+ d->name = NULL;
+ return FALSE;
+ }
+ }
+
+ /* 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;
}
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)
+{
+ BusConnectionData *d;
+ unsigned long uid;
+
+ d = BUS_CONNECTION_DATA (requesting_completion);
+ _dbus_assert (d != NULL);
+
+ _dbus_assert (d->name == NULL);
+
+ 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 dbus_bool_t
+bus_pending_reply_send_no_reply (BusConnections *connections,
+ BusTransaction *transaction,
+ BusPendingReply *pending)
+{
+ DBusMessage *message;
+ DBusMessageIter iter;
+ dbus_bool_t retval;
+
+ 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;
+
+ dbus_message_append_iter_init (message, &iter);
+ if (!dbus_message_iter_append_string (&iter, "Message did not receive a reply (timeout by message bus)"))
+ 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 void
+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.
+ */
+ transaction = bus_transaction_new (connections->context);
+ if (transaction == NULL)
+ return;
+
+ if (bus_pending_reply_send_no_reply (connections,
+ transaction,
+ pending))
+ {
+ _dbus_list_remove_link (&connections->pending_replies->items,
+ link);
+ dbus_free (pending);
+ bus_transaction_cancel_and_free (transaction);
+ }
+
+ bus_transaction_execute_and_free (transaction);
+}
+
+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;
+
+ link = _dbus_list_get_first_link (&connections->pending_replies->items);
+ while (link != NULL)
+ {
+ DBusList *next;
+ BusPendingReply *pending;
+
+ next = _dbus_list_get_next_link (&connections->pending_replies->items,
+ link);
+ pending = link->data;
+
+ if (pending->will_get_reply == connection)
+ {
+ /* We don't need to track this pending reply anymore */
+
+ _dbus_list_remove_link (&connections->pending_replies->items,
+ link);
+ dbus_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
+ */
+
+ pending->will_send_reply = NULL;
+ pending->expire_item.added_tv_sec = 0;
+ pending->expire_item.added_tv_usec = 0;
+
+ bus_expire_timeout_set_interval (connections->pending_replies->timeout,
+ 0);
+ }
+
+ link = next;
+ }
+}
+
+
+typedef struct
+{
+ BusPendingReply *pending;
+ BusConnections *connections;
+} CancelPendingReplyData;
+
+static void
+cancel_pending_reply (void *data)
+{
+ CancelPendingReplyData *d = data;
+
+ if (!_dbus_list_remove (&d->connections->pending_replies->items,
+ d->pending))
+ _dbus_assert_not_reached ("pending reply did not exist to be cancelled");
+
+ dbus_free (d->pending); /* since it's been cancelled */
+}
+
+static void
+cancel_pending_reply_data_free (void *data)
+{
+ CancelPendingReplyData *d = data;
+
+ /* 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_connections_expect_reply (BusConnections *connections,
+ BusTransaction *transaction,
+ DBusConnection *will_get_reply,
+ DBusConnection *will_send_reply,
+ DBusMessage *reply_to_this,
+ DBusError *error)
+{
+ BusPendingReply *pending;
+ dbus_uint32_t reply_serial;
+ DBusList *link;
+ CancelPendingReplyData *cprd;
+
+ _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);
+
+ link = _dbus_list_get_first_link (&connections->pending_replies->items);
+ while (link != NULL)
+ {
+ pending = link->data;
+
+ 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 = _dbus_list_get_next_link (&connections->pending_replies->items,
+ link);
+ }
+
+ pending = dbus_new0 (BusPendingReply, 1);
+ if (pending == NULL)
+ {
+ BUS_SET_OOM (error);
+ return FALSE;
+ }
+
+ cprd = dbus_new0 (CancelPendingReplyData, 1);
+ if (cprd == NULL)
+ {
+ BUS_SET_OOM (error);
+ dbus_free (pending);
+ return FALSE;
+ }
+
+ if (!_dbus_list_prepend (&connections->pending_replies->items,
+ pending))
+ {
+ BUS_SET_OOM (error);
+ dbus_free (cprd);
+ dbus_free (pending);
+ return FALSE;
+ }
+
+ if (!bus_transaction_add_cancel_hook (transaction,
+ cancel_pending_reply,
+ cprd,
+ cancel_pending_reply_data_free))
+ {
+ BUS_SET_OOM (error);
+ _dbus_list_remove (&connections->pending_replies->items, pending);
+ dbus_free (cprd);
+ dbus_free (pending);
+ return FALSE;
+ }
+
+ cprd->pending = pending;
+ cprd->connections = connections;
+
+ _dbus_get_current_time (&pending->expire_item.added_tv_sec,
+ &pending->expire_item.added_tv_usec);
+
+ pending->will_get_reply = will_get_reply;
+ pending->will_send_reply = will_send_reply;
+ pending->reply_serial = reply_serial;
+
+ return TRUE;
+}
+
+typedef struct
+{
+ DBusList *link;
+ BusConnections *connections;
+} CheckPendingReplyData;
+
+static void
+cancel_check_pending_reply (void *data)
+{
+ CheckPendingReplyData *d = data;
+
+ _dbus_list_prepend_link (&d->connections->pending_replies->items,
+ d->link);
+ d->link = NULL;
+}
+
+static void
+check_pending_reply_data_free (void *data)
+{
+ CheckPendingReplyData *d = data;
+
+ if (d->link != NULL)
+ {
+ BusPendingReply *pending = d->link->data;
+
+ dbus_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_connections_check_reply (BusConnections *connections,
+ BusTransaction *transaction,
+ DBusConnection *sending_reply,
+ DBusConnection *receiving_reply,
+ DBusMessage *reply,
+ DBusError *error)
+{
+ CheckPendingReplyData *cprd;
+ DBusList *link;
+ dbus_uint32_t reply_serial;
+
+ _dbus_assert (sending_reply != NULL);
+ _dbus_assert (receiving_reply != NULL);
+
+ reply_serial = dbus_message_get_reply_serial (reply);
+
+ link = _dbus_list_get_first_link (&connections->pending_replies->items);
+ while (link != NULL)
+ {
+ BusPendingReply *pending = link->data;
+
+ if (pending->reply_serial == reply_serial &&
+ pending->will_get_reply == receiving_reply &&
+ pending->will_send_reply == sending_reply)
+ {
+ _dbus_verbose ("Found pending reply\n");
+ break;
+ }
+
+ link = _dbus_list_get_next_link (&connections->pending_replies->items,
+ link);
+ }
+
+ if (link == NULL)
+ {
+ _dbus_verbose ("No pending reply expected\n");
+
+ return FALSE;
+ }
+
+ cprd = dbus_new0 (CheckPendingReplyData, 1);
+ if (cprd == NULL)
+ {
+ BUS_SET_OOM (error);
+ 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;
+ }
+
+ cprd->link = link;
+ cprd->connections = connections;
+
+ _dbus_list_remove_link (&connections->pending_replies->items,
+ link);
+
+ return TRUE;
+}
+
/*
* Transactions
*
* to check security policy since it was not done in
* dispatch.c
*/
- _dbus_verbose ("Sending %s from driver\n",
- dbus_message_get_name (message));
-
- if (!dbus_message_set_sender (message, DBUS_SERVICE_DBUS))
+ _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_ORG_FREEDESKTOP_DBUS))
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),
- NULL, connection, message, NULL))
+ transaction,
+ NULL, connection, connection, message, NULL))
return TRUE;
return bus_transaction_send (transaction, connection, message);
BusConnectionData *d;
DBusList *link;
- _dbus_verbose (" trying to add %s %s to transaction%s\n",
- dbus_message_get_is_error (message) ? "error" :
+ _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_name (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 (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;
projects / platform / upstream / dbus.git / blobdiff