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DBusServer
[D-BUS low-level public API]

Server that listens for new connections. More...

Typedefs

typedef DBusServer DBusServer
 An opaque object representing a server that listens for connections from other applications.

Functions

DBusServerdbus_server_listen (const char *address, DBusError *error)
 Listens for new connections on the given address.
DBusServerdbus_server_ref (DBusServer *server)
 Increments the reference count of a DBusServer.
void dbus_server_unref (DBusServer *server)
 Decrements the reference count of a DBusServer.
void _dbus_server_ref_unlocked (DBusServer *server)
 Like dbus_server_ref() but does not acquire the lock (must already be held).
void _dbus_server_unref_unlocked (DBusServer *server)
 Like dbus_server_unref() but does not acquire the lock (must already be held).
void dbus_server_disconnect (DBusServer *server)
 Releases the server's address and stops listening for new clients.
dbus_bool_t dbus_server_get_is_connected (DBusServer *server)
 Returns TRUE if the server is still listening for new connections.
char * dbus_server_get_address (DBusServer *server)
 Returns the address of the server, as a newly-allocated string which must be freed by the caller.
void dbus_server_set_new_connection_function (DBusServer *server, DBusNewConnectionFunction function, void *data, DBusFreeFunction free_data_function)
 Sets a function to be used for handling new connections.
dbus_bool_t dbus_server_set_watch_functions (DBusServer *server, DBusAddWatchFunction add_function, DBusRemoveWatchFunction remove_function, DBusWatchToggledFunction toggled_function, void *data, DBusFreeFunction free_data_function)
 Sets the watch functions for the connection.
dbus_bool_t dbus_server_set_timeout_functions (DBusServer *server, DBusAddTimeoutFunction add_function, DBusRemoveTimeoutFunction remove_function, DBusTimeoutToggledFunction toggled_function, void *data, DBusFreeFunction free_data_function)
 Sets the timeout functions for the connection.
dbus_bool_t dbus_server_set_auth_mechanisms (DBusServer *server, const char **mechanisms)
 Sets the authentication mechanisms that this server offers to clients, as a list of SASL mechanisms.
dbus_bool_t dbus_server_allocate_data_slot (dbus_int32_t *slot_p)
 Allocates an integer ID to be used for storing application-specific data on any DBusServer.
void dbus_server_free_data_slot (dbus_int32_t *slot_p)
 Deallocates a global ID for server data slots.
dbus_bool_t dbus_server_set_data (DBusServer *server, int slot, void *data, DBusFreeFunction free_data_func)
 Stores a pointer on a DBusServer, along with an optional function to be used for freeing the data when the data is set again, or when the server is finalized.
void * dbus_server_get_data (DBusServer *server, int slot)
 Retrieves data previously set with dbus_server_set_data().

Detailed Description

Server that listens for new connections.

Types and functions related to DBusServer. A DBusServer represents a server that other applications can connect to. Each connection from another application is represented by a DBusConnection.

Todo:
Thread safety hasn't been looked at for DBusServer

Need notification to apps of disconnection, may matter for some transports


Typedef Documentation

DBusServer
 

An opaque object representing a server that listens for connections from other applications.

Each time a connection is made, a new DBusConnection is created and made available via an application-provided DBusNewConnectionFunction. The DBusNewConnectionFunction is provided with dbus_server_set_new_connection_function().

Definition at line 37 of file dbus-server.h.


Function Documentation

void _dbus_server_ref_unlocked DBusServer server  ) 
 

Like dbus_server_ref() but does not acquire the lock (must already be held).

Parameters:
server the server.

Definition at line 738 of file dbus-server.c.

References _dbus_assert, _dbus_atomic_inc(), NULL, refcount, and DBusAtomic::value.

Referenced by dbus_server_disconnect().

void _dbus_server_unref_unlocked DBusServer server  ) 
 

Like dbus_server_unref() but does not acquire the lock (must already be held).

Parameters:
server the server.

Definition at line 760 of file dbus-server.c.

References _dbus_assert, _dbus_atomic_dec(), disconnected, DBusServerVTable::finalize, NULL, refcount, DBusAtomic::value, and vtable.

dbus_bool_t dbus_server_allocate_data_slot dbus_int32_t slot_p  ) 
 

Allocates an integer ID to be used for storing application-specific data on any DBusServer.

The allocated ID may then be used with dbus_server_set_data() and dbus_server_get_data(). The slot must be initialized with -1. If a nonnegative slot is passed in, the refcount is incremented on that slot, rather than creating a new slot.

The allocated slot is global, i.e. all DBusServer objects will have a slot with the given integer ID reserved.

Parameters:
slot_p address of global variable storing the slot ID
Returns:
FALSE on no memory

Definition at line 1060 of file dbus-server.c.

References _dbus_data_slot_allocator_alloc(), and _DBUS_LOCK_NAME.

Referenced by dbus_server_setup_with_g_main().

void dbus_server_disconnect DBusServer server  ) 
 

Releases the server's address and stops listening for new clients.

If called more than once, only the first call has an effect. Does not modify the server's reference count.

Parameters:
server the server.

Definition at line 799 of file dbus-server.c.

References _dbus_assert, _dbus_server_ref_unlocked(), dbus_server_unref(), DBusServerVTable::disconnect, disconnected, NULL, refcount, TRUE, DBusAtomic::value, and vtable.

void dbus_server_free_data_slot dbus_int32_t slot_p  ) 
 

Deallocates a global ID for server data slots.

dbus_server_get_data() and dbus_server_set_data() may no longer be used with this slot. Existing data stored on existing DBusServer objects will be freed when the server is finalized, but may not be retrieved (and may only be replaced if someone else reallocates the slot).

Parameters:
slot_p address of the slot to deallocate

Definition at line 1079 of file dbus-server.c.

References _dbus_data_slot_allocator_free().

char* dbus_server_get_address DBusServer server  ) 
 

Returns the address of the server, as a newly-allocated string which must be freed by the caller.

Parameters:
server the server
Returns:
the address or NULL if no memory

Definition at line 848 of file dbus-server.c.

References _dbus_strdup(), address, and NULL.

void* dbus_server_get_data DBusServer server,
int  slot
 

Retrieves data previously set with dbus_server_set_data().

The slot must still be allocated (must not have been freed).

Parameters:
server the server
slot the slot to get data from
Returns:
the data, or NULL if not found

Definition at line 1140 of file dbus-server.c.

References _dbus_data_slot_list_get(), NULL, and slot_list.

Referenced by dbus_server_setup_with_g_main().

dbus_bool_t dbus_server_get_is_connected DBusServer server  ) 
 

Returns TRUE if the server is still listening for new connections.

Parameters:
server the server.

Definition at line 827 of file dbus-server.c.

References disconnected, FALSE, and NULL.

DBusServer* dbus_server_listen const char *  address,
DBusError error
 

Listens for new connections on the given address.

Returns NULL if listening fails for any reason. Otherwise returns a new DBusServer. dbus_server_set_new_connection_function() and dbus_server_set_watch_functions() should be called immediately to render the server fully functional.

Todo:
error messages on bad address could really be better.
DBusResultCode is a bit limiting here.

Parameters:
address the address of this server.
error location to store rationale for failure.
Returns:
a new DBusServer, or NULL on failure.

Definition at line 486 of file dbus-server.c.

References _dbus_concat_dir_and_file(), _dbus_generate_random_ascii(), _dbus_server_new_for_domain_socket(), _dbus_server_new_for_tcp_socket(), _dbus_string_append(), _dbus_string_free(), _dbus_string_init(), _dbus_string_init_const(), _dbus_string_parse_int(), dbus_address_entries_free(), dbus_address_entry_get_method(), dbus_address_entry_get_value(), dbus_parse_address(), dbus_set_error(), FALSE, NULL, and TRUE.

DBusServer* dbus_server_ref DBusServer server  ) 
 

Increments the reference count of a DBusServer.

Parameters:
server the server.
Returns:
the server

Definition at line 674 of file dbus-server.c.

References _dbus_assert, _dbus_atomic_inc(), NULL, refcount, and DBusAtomic::value.

dbus_bool_t dbus_server_set_auth_mechanisms DBusServer server,
const char **  mechanisms
 

Sets the authentication mechanisms that this server offers to clients, as a list of SASL mechanisms.

This function only affects connections created *after* it is called. Pass NULL instead of an array to use all available mechanisms.

Parameters:
server the server
mechanisms NULL-terminated array of mechanisms
Returns:
FALSE if no memory

Definition at line 1015 of file dbus-server.c.

References _dbus_dup_string_array(), auth_mechanisms, dbus_free_string_array(), FALSE, NULL, and TRUE.

dbus_bool_t dbus_server_set_data DBusServer server,
int  slot,
void *  data,
DBusFreeFunction  free_data_func
 

Stores a pointer on a DBusServer, along with an optional function to be used for freeing the data when the data is set again, or when the server is finalized.

The slot number must have been allocated with dbus_server_allocate_data_slot().

Parameters:
server the server
slot the slot number
data the data to store
free_data_func finalizer function for the data
Returns:
TRUE if there was enough memory to store the data

Definition at line 1100 of file dbus-server.c.

References _dbus_data_slot_list_set(), FALSE, NULL, and slot_list.

Referenced by dbus_server_setup_with_g_main().

void dbus_server_set_new_connection_function DBusServer server,
DBusNewConnectionFunction  function,
void *  data,
DBusFreeFunction  free_data_function
 

Sets a function to be used for handling new connections.

The given function is passed each new connection as the connection is created. If the new connection function increments the connection's reference count, the connection will stay alive. Otherwise, the connection will be unreferenced and closed.

Parameters:
server the server.
function a function to handle new connections.
data data to pass to the new connection handler.
free_data_function function to free the data.

Definition at line 874 of file dbus-server.c.

References new_connection_data, new_connection_free_data_function, new_connection_function, and NULL.

Referenced by _dbus_server_finalize_base().

dbus_bool_t dbus_server_set_timeout_functions DBusServer server,
DBusAddTimeoutFunction  add_function,
DBusRemoveTimeoutFunction  remove_function,
DBusTimeoutToggledFunction  toggled_function,
void *  data,
DBusFreeFunction  free_data_function
 

Sets the timeout functions for the connection.

These functions are responsible for making the application's main loop aware of timeouts.

This function behaves exactly like dbus_connection_set_timeout_functions(); see the documentation for that routine.

Parameters:
server the server.
add_function function to add a timeout.
remove_function function to remove a timeout.
toggled_function function to notify when the timeout is enabled/disabled
data data to pass to add_function and remove_function.
free_data_function function to be called to free the data.
Returns:
FALSE on failure (no memory)

Definition at line 967 of file dbus-server.c.

References _dbus_timeout_list_set_functions(), _dbus_warn(), FALSE, NULL, and timeouts.

Referenced by dbus_server_setup_with_g_main().

dbus_bool_t dbus_server_set_watch_functions DBusServer server,
DBusAddWatchFunction  add_function,
DBusRemoveWatchFunction  remove_function,
DBusWatchToggledFunction  toggled_function,
void *  data,
DBusFreeFunction  free_data_function
 

Sets the watch functions for the connection.

These functions are responsible for making the application's main loop aware of file descriptors that need to be monitored for events.

This function behaves exactly like dbus_connection_set_watch_functions(); see the documentation for that routine.

Parameters:
server the server.
add_function function to begin monitoring a new descriptor.
remove_function function to stop monitoring a descriptor.
toggled_function function to notify when the watch is enabled/disabled
data data to pass to add_function and remove_function.
free_data_function function to be called to free the data.
Returns:
FALSE on failure (no memory)

Definition at line 914 of file dbus-server.c.

References _dbus_warn(), _dbus_watch_list_set_functions(), FALSE, NULL, and watches.

Referenced by dbus_server_setup_with_g_main().

void dbus_server_unref DBusServer server  ) 
 

Decrements the reference count of a DBusServer.

Finalizes the server if the reference count reaches zero.

The server must be disconnected before the refcount reaches zero.

Parameters:
server the server.

Definition at line 701 of file dbus-server.c.

References _dbus_assert, _dbus_atomic_dec(), disconnected, DBusServerVTable::finalize, NULL, refcount, DBusAtomic::value, and vtable.

Referenced by dbus_server_disconnect().


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