4 * Created on: Sep 4, 2013
7 * kdbus add-on to dbus daemon
11 #include <dbus/dbus-connection-internal.h>
13 #include <dbus/kdbus.h>
14 #include <dbus/dbus-bus.h>
16 #include <dbus/kdbus-common.h>
17 #include <dbus/dbus-transport.h>
18 #include <dbus/dbus-transport-kdbus.h>
19 #include "connection.h"
20 #include "activation.h"
30 __u64 sender_name_to_id(const char* name, DBusError* error)
34 if(!strncmp(name, ":1.", 3)) /*if name is unique name it must be converted to unique id*/
35 sender_id = strtoull(&name[3], NULL, 10);
37 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, "Could not convert sender of the message into kdbus unique id");
42 char* make_kdbus_bus(DBusBusType type, DBusError *error)
45 struct kdbus_cmd_bus_make head;
49 } __attribute__ ((__aligned__(8))) bus_make;
54 /*TODO Distinguish session and system bus make*/
56 _dbus_verbose("Opening /dev/kdbus/control\n");
57 fdc = open("/dev/kdbus/control", O_RDWR|O_CLOEXEC);
60 _dbus_verbose("--- error %d (%m)\n", fdc);
61 dbus_set_error(error, DBUS_ERROR_FAILED, "Opening /dev/kdbus/control failed: %d (%m)", fdc);
65 memset(&bus_make, 0, sizeof(bus_make));
66 bus_make.head.bloom_size = 64;
67 bus_make.head.flags = KDBUS_MAKE_ACCESS_WORLD;
69 if(type == DBUS_BUS_SYSTEM)
70 snprintf(bus_make.name, sizeof(bus_make.name), "%u-kdbus-%s", getuid(), "system");
72 snprintf(bus_make.name, sizeof(bus_make.name), "%u-kdbus-%u", getuid(), getpid());
73 bus_make.n_type = KDBUS_MAKE_NAME;
74 bus_make.n_size = KDBUS_PART_HEADER_SIZE + strlen(bus_make.name) + 1;
75 bus_make.head.size = sizeof(struct kdbus_cmd_bus_make) + bus_make.n_size;
77 _dbus_verbose("Creating bus '%s'\n", bus_make.name);
78 ret = ioctl(fdc, KDBUS_CMD_BUS_MAKE, &bus_make);
81 _dbus_verbose("--- error %d (%m)\n", ret);
82 dbus_set_error(error, DBUS_ERROR_FAILED, "Creating bus '%s' failed: %d (%m)", bus_make.name, fdc);
86 if (asprintf(&bus, "kdbus:path=/dev/kdbus/%s/bus", bus_make.name) < 0)
92 _dbus_verbose("Return value '%s'\n", bus);
96 DBusServer* empty_server_init(char* address)
98 return dbus_server_init_mini(address);
101 DBusConnection* daemon_as_client(DBusBusType type, char* address, DBusError *error)
103 DBusConnection* connection;
104 DBusString daemon_name;
106 dbus_bus_set_bus_connection_address(type, address);
108 connection = dbus_bus_get_private(type, error); /*todo possibly could be optimised by using lower functions*/
109 if(connection == NULL)
112 _dbus_string_init_const(&daemon_name, DBUS_SERVICE_DBUS);
113 if(!kdbus_register_policy (&daemon_name, connection))
116 if(kdbus_request_name(connection, &daemon_name, 0, 0) != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER)
119 if(!add_match_kdbus (dbus_connection_get_transport(connection), 1, "member='IdRemoved'"))
121 dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match for id:1, %s", _dbus_strerror_from_errno ());
124 if(!add_match_kdbus (dbus_connection_get_transport(connection), 1, "member='NameChanged'"))
126 dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match for id:1, %s", _dbus_strerror_from_errno ());
129 if(!add_match_kdbus (dbus_connection_get_transport(connection), 1, "member='NameLost'"))
131 dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match for id:1, %s", _dbus_strerror_from_errno ());
134 if(!add_match_kdbus (dbus_connection_get_transport(connection), 1, "member='NameAcquired'"))
136 dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match for id:1, %s", _dbus_strerror_from_errno ());
140 if(dbus_error_is_set(error))
143 _dbus_connection_close_possibly_shared (connection);
144 dbus_connection_unref (connection);
148 _dbus_verbose ("Daemon connected as kdbus client.\n");
153 dbus_bool_t kdbus_register_policy (const DBusString *service_name, DBusConnection* connection)
157 _dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd);
159 return register_kdbus_policy(_dbus_string_get_const_data(service_name), fd);
162 dbus_uint32_t kdbus_request_name(DBusConnection* connection, const DBusString *service_name, dbus_uint32_t flags, __u64 sender_id)
166 _dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd);
168 return request_kdbus_name(fd, _dbus_string_get_const_data(service_name), flags, sender_id);
171 dbus_uint32_t kdbus_release_name(DBusConnection* connection, const DBusString *service_name, __u64 sender_id)
175 _dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd);
177 return release_kdbus_name(fd, _dbus_string_get_const_data(service_name), sender_id);
180 dbus_bool_t kdbus_list_services (DBusConnection* connection, char ***listp, int *array_len)
184 _dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd);
186 return list_kdbus_names(fd, listp, array_len);
189 dbus_bool_t kdbus_add_match_rule (DBusConnection* connection, DBusMessage* message, const char* text, DBusError* error)
193 sender_id = sender_name_to_id(dbus_message_get_sender(message), error);
194 if(dbus_error_is_set(error))
197 if(!add_match_kdbus (dbus_connection_get_transport(connection), sender_id, text))
199 dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match for id:%d, %s",
200 sender_id, _dbus_strerror_from_errno ());
207 dbus_bool_t kdbus_remove_match (DBusConnection* connection, DBusMessage* message, DBusError* error)
211 sender_id = sender_name_to_id(dbus_message_get_sender(message), error);
212 if(dbus_error_is_set(error))
215 if(!remove_match_kdbus (dbus_connection_get_transport(connection), sender_id))
217 dbus_set_error (error, _dbus_error_from_errno (errno), "Could not remove match rules for id:%d", sender_id);
224 dbus_bool_t kdbus_get_connection_unix_user(DBusConnection* connection, DBusMessage* message, unsigned long* uid, DBusError* error)
227 struct nameInfo info;
229 dbus_bool_t ret = FALSE;
231 dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID);
232 inter_ret = kdbus_NameQuery(name, dbus_connection_get_transport(connection), &info);
233 if(inter_ret == 0) //name found
235 _dbus_verbose("User id:%llu\n", (unsigned long long) info.userId);
239 else if(inter_ret == -ENOENT) //name has no owner
240 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not get UID of name '%s': no such name", name);
243 _dbus_verbose("kdbus error determining UID: err %d (%m)\n", errno);
244 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not determine UID for '%s'", name);
250 dbus_bool_t kdbus_get_connection_unix_process_id(DBusConnection* connection, DBusMessage* message, unsigned long* pid, DBusError* error)
253 struct nameInfo info;
255 dbus_bool_t ret = FALSE;
257 dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID);
258 inter_ret = kdbus_NameQuery(name, dbus_connection_get_transport(connection), &info);
259 if(inter_ret == 0) //name found
261 _dbus_verbose("Process id:%llu\n", (unsigned long long) info.processId);
262 *pid = info.processId;
265 else if(inter_ret == -ENOENT) //name has no owner
266 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not get PID of name '%s': no such name", name);
269 _dbus_verbose("kdbus error determining PID: err %d (%m)\n", errno);
270 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not determine PID for '%s'", name);
276 dbus_bool_t kdbus_get_connection_unix_selinux_security_context(DBusConnection* connection, DBusMessage* message, DBusMessage* reply, DBusError* error)
279 struct nameInfo info;
281 dbus_bool_t ret = FALSE;
283 dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID);
284 inter_ret = kdbus_NameQuery(name, dbus_connection_get_transport(connection), &info);
285 if(inter_ret == -ENOENT) //name has no owner
286 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not get security context of name '%s': no such name", name);
287 else if(inter_ret < 0)
289 _dbus_verbose("kdbus error determining security context: err %d (%m)\n", errno);
290 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not determine security context for '%s'", name);
294 if (!dbus_message_append_args (reply, DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE, &info.sec_label, info.sec_label_len, DBUS_TYPE_INVALID))
296 _DBUS_SET_OOM (error);
305 DBusConnection* create_phantom_connection(DBusConnection* connection, const char* unique_name, DBusError* error)
307 DBusConnection *phantom_connection;
310 _dbus_string_init_const(&name, unique_name);
312 phantom_connection = _dbus_connection_new_for_used_transport (dbus_connection_get_transport(connection));
313 if(phantom_connection == NULL)
315 if(!bus_connections_setup_connection(bus_connection_get_connections(connection), phantom_connection))
317 dbus_connection_unref_phantom(phantom_connection);
318 phantom_connection = NULL;
319 dbus_set_error (error, DBUS_ERROR_FAILED , "Name \"%s\" could not be acquired", unique_name);
322 if(!bus_connection_complete(phantom_connection, &name, error))
324 bus_connection_disconnected(phantom_connection);
325 phantom_connection = NULL;
329 _dbus_verbose ("Created phantom connection for %s\n", bus_connection_get_name(phantom_connection));
332 return phantom_connection;
335 dbus_bool_t register_kdbus_starters(DBusConnection* connection)
339 dbus_bool_t retval = FALSE;
341 BusTransaction *transaction;
344 transaction = bus_transaction_new (bus_connection_get_context(connection));
345 if (transaction == NULL)
348 if (!bus_activation_list_services (bus_connection_get_activation (connection), &services, &len))
351 _dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd);
352 _dbus_string_init(&name);
356 if(!register_kdbus_policy(services[i], fd))
359 if (request_kdbus_name(fd, services[i], (DBUS_NAME_FLAG_ALLOW_REPLACEMENT | KDBUS_NAME_STARTER) , 0) < 0)
362 if(!_dbus_string_append(&name, services[i]))
364 if(!bus_registry_ensure (bus_connection_get_registry (connection), &name, connection,
365 (DBUS_NAME_FLAG_ALLOW_REPLACEMENT | KDBUS_NAME_STARTER), transaction, NULL))
367 if(!_dbus_string_set_length(&name, 0))
374 release_kdbus_name(fd, services[j], 0);
375 dbus_free_string_array (services);
376 _dbus_string_free(&name);
377 bus_transaction_free(transaction);
382 static dbus_bool_t remove_conn_if_name_match (DBusConnection *connection, void *data)
384 if(!strcmp(bus_connection_get_name(connection), (char*)data))
386 bus_connection_disconnected(connection);
387 return FALSE; //this is to break foreach function
392 void handleNameOwnerChanged(DBusMessage *msg, BusTransaction *transaction, DBusConnection *connection)
394 const char *name, *old, *new;
396 if(!dbus_message_get_args(msg, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_STRING, &old, DBUS_TYPE_STRING, &new, DBUS_TYPE_INVALID))
398 _dbus_verbose ("Couldn't get args of NameOwnerChanged signal: .\n");//, error.message);
402 _dbus_verbose ("Got NameOwnerChanged signal:\nName: %s\nOld: %s\nNew: %s\n", name, old, new);
404 if(!strncmp(name, ":1.", 3))/*if it starts from :1. it is unique name - this might be IdRemoved info*/
406 if(!strcmp(name, old)) //yes it is - someone has disconnected
408 DBusConnection* conn;
410 conn = bus_connections_find_conn_by_name(bus_connection_get_connections(connection), name);
412 bus_connection_disconnected(conn);
415 else //it is well-known name
417 if((*old != 0) && (strcmp(old, ":1.1")))
419 DBusMessage *message;
421 if(bus_connections_find_conn_by_name(bus_connection_get_connections(connection), old) == NULL)
424 _dbus_verbose ("Owner '%s' lost name '%s'. Sending NameLost.\n", old, name);
426 message = dbus_message_new_signal (DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS, "NameLost");
430 if (!dbus_message_set_destination (message, old) || !dbus_message_append_args (message,
431 DBUS_TYPE_STRING, &name,
434 dbus_message_unref (message);
438 bus_transaction_send_from_driver (transaction, connection, message);
439 dbus_message_unref (message);
442 if((*new != 0) && (strcmp(new, ":1.1")))
444 DBusMessage *message;
446 _dbus_verbose ("Owner '%s' acquired name '%s'. Sending NameAcquired.\n", new, name);
448 message = dbus_message_new_signal (DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS, "NameAcquired");
452 if (!dbus_message_set_destination (message, new) || !dbus_message_append_args (message,
453 DBUS_TYPE_STRING, &name,
456 dbus_message_unref (message);
460 bus_transaction_send_from_driver (transaction, connection, message);
461 dbus_message_unref (message);