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"
29 __u64 sender_name_to_id(const char* name, DBusError* error)
33 if(!strncmp(name, ":1.", 3)) /*if name is unique name it must be converted to unique id*/
34 sender_id = strtoull(&name[3], NULL, 10);
36 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, "Could not convert sender of the message into kdbus unique id");
41 char* make_kdbus_bus(DBusBusType type, DBusError *error)
44 struct kdbus_cmd_bus_make head;
48 } __attribute__ ((__aligned__(8))) bus_make;
53 /*TODO Distinguish session and system bus make*/
54 /*TODO Add dbus_set_error(error, DBUS_ERROR_FAILED, "...") (?)*/
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);
64 memset(&bus_make, 0, sizeof(bus_make));
65 bus_make.head.bloom_size = 64;
66 bus_make.head.flags = KDBUS_MAKE_ACCESS_WORLD;
68 if(type == DBUS_BUS_SYSTEM)
69 snprintf(bus_make.name, sizeof(bus_make.name), "%u-kdbus-%s", getuid(), "system");
71 snprintf(bus_make.name, sizeof(bus_make.name), "%u-kdbus", getuid());
72 bus_make.n_type = KDBUS_MAKE_NAME;
73 bus_make.n_size = KDBUS_PART_HEADER_SIZE + strlen(bus_make.name) + 1;
74 bus_make.head.size = sizeof(struct kdbus_cmd_bus_make) + bus_make.n_size;
76 _dbus_verbose("Creating bus '%s'\n", bus_make.name);
77 ret = ioctl(fdc, KDBUS_CMD_BUS_MAKE, &bus_make);
80 _dbus_verbose("--- error %d (%m)\n", ret);
84 if (asprintf(&bus, "kdbus:path=/dev/kdbus/%s/bus", bus_make.name) < 0)
90 _dbus_verbose("Return value '%s'\n", bus);
94 DBusServer* empty_server_init(char* address)
96 return dbus_server_init_mini(address);
99 DBusConnection* daemon_as_client(DBusBusType type, char* address, DBusError *error)
101 DBusConnection* connection;
102 DBusString daemon_name;
104 dbus_bus_set_bus_connection_address(type, address);
106 connection = dbus_bus_get_private(type, error); /*todo possibly could be optimised by using lower functions*/
107 if(connection == NULL)
110 _dbus_string_init_const(&daemon_name, DBUS_SERVICE_DBUS);
111 if(!kdbus_register_policy (&daemon_name, connection))
114 if(kdbus_request_name(connection, &daemon_name, 0, 0) != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER)
117 if(!add_match_kdbus (dbus_connection_get_transport(connection), 1, "member='IdRemoved'"))
119 dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match for id:1, %s", _dbus_strerror_from_errno ());
122 if(!add_match_kdbus (dbus_connection_get_transport(connection), 1, "member='NameChanged'"))
124 dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match for id:1, %s", _dbus_strerror_from_errno ());
127 if(!add_match_kdbus (dbus_connection_get_transport(connection), 1, "member='NameLost'"))
129 dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match for id:1, %s", _dbus_strerror_from_errno ());
132 if(!add_match_kdbus (dbus_connection_get_transport(connection), 1, "member='NameAcquired'"))
134 dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match for id:1, %s", _dbus_strerror_from_errno ());
138 if(dbus_error_is_set(error))
141 _dbus_connection_close_possibly_shared (connection);
142 dbus_connection_unref (connection);
146 _dbus_verbose ("Daemon connected as kdbus client.\n");
151 dbus_bool_t kdbus_register_policy (const DBusString *service_name, DBusConnection* connection)
155 _dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd);
157 return register_kdbus_policy(_dbus_string_get_const_data(service_name), fd);
160 dbus_uint32_t kdbus_request_name(DBusConnection* connection, const DBusString *service_name, dbus_uint32_t flags, __u64 sender_id)
164 _dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd);
166 return request_kdbus_name(fd, _dbus_string_get_const_data(service_name), flags, sender_id);
169 dbus_uint32_t kdbus_release_name(DBusConnection* connection, const DBusString *service_name, __u64 sender_id)
173 _dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd);
175 return release_kdbus_name(fd, _dbus_string_get_const_data(service_name), sender_id);
178 dbus_bool_t kdbus_list_services (DBusConnection* connection, char ***listp, int *array_len)
182 _dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd);
184 return list_kdbus_names(fd, listp, array_len);
187 dbus_bool_t kdbus_add_match_rule (DBusConnection* connection, DBusMessage* message, const char* text, DBusError* error)
191 sender_id = sender_name_to_id(dbus_message_get_sender(message), error);
192 if(dbus_error_is_set(error))
195 if(!add_match_kdbus (dbus_connection_get_transport(connection), sender_id, text))
197 dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match for id:%d, %s",
198 sender_id, _dbus_strerror_from_errno ());
205 dbus_bool_t kdbus_remove_match (DBusConnection* connection, DBusMessage* message, DBusError* error)
209 sender_id = sender_name_to_id(dbus_message_get_sender(message), error);
210 if(dbus_error_is_set(error))
213 if(!remove_match_kdbus (dbus_connection_get_transport(connection), sender_id))
215 dbus_set_error (error, _dbus_error_from_errno (errno), "Could not remove match rules for id:%d", sender_id);
222 dbus_bool_t kdbus_get_connection_unix_user(DBusConnection* connection, DBusMessage* message, unsigned long* uid, DBusError* error)
225 struct nameInfo info;
227 dbus_bool_t ret = FALSE;
229 dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID);
230 inter_ret = kdbus_NameQuery(name, dbus_connection_get_transport(connection), &info);
231 if(inter_ret == 0) //name found
233 _dbus_verbose("User id:%llu\n", (unsigned long long) info.userId);
237 else if(inter_ret == -ENOENT) //name has no owner
238 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not get UID of name '%s': no such name", name);
241 _dbus_verbose("kdbus error determining UID: err %d (%m)\n", errno);
242 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not determine UID for '%s'", name);
248 dbus_bool_t kdbus_get_connection_unix_process_id(DBusConnection* connection, DBusMessage* message, unsigned long* pid, DBusError* error)
251 struct nameInfo info;
253 dbus_bool_t ret = FALSE;
255 dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID);
256 inter_ret = kdbus_NameQuery(name, dbus_connection_get_transport(connection), &info);
257 if(inter_ret == 0) //name found
259 _dbus_verbose("Process id:%llu\n", (unsigned long long) info.processId);
260 *pid = info.processId;
263 else if(inter_ret == -ENOENT) //name has no owner
264 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not get PID of name '%s': no such name", name);
267 _dbus_verbose("kdbus error determining PID: err %d (%m)\n", errno);
268 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not determine PID for '%s'", name);
274 dbus_bool_t kdbus_get_connection_unix_selinux_security_context(DBusConnection* connection, DBusMessage* message, DBusMessage* reply, DBusError* error)
277 struct nameInfo info;
279 dbus_bool_t ret = FALSE;
281 dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID);
282 inter_ret = kdbus_NameQuery(name, dbus_connection_get_transport(connection), &info);
283 if(inter_ret == -ENOENT) //name has no owner
284 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not get security context of name '%s': no such name", name);
285 else if(inter_ret < 0)
287 _dbus_verbose("kdbus error determining security context: err %d (%m)\n", errno);
288 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not determine security context for '%s'", name);
292 if (!dbus_message_append_args (reply, DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE, &info.sec_label, info.sec_label_len, DBUS_TYPE_INVALID))
294 _DBUS_SET_OOM (error);
303 DBusConnection* create_phantom_connection(DBusConnection* connection, const char* unique_name, DBusError* error)
305 DBusConnection *phantom_connection;
308 _dbus_string_init_const(&name, unique_name);
310 phantom_connection = _dbus_connection_new_for_used_transport (dbus_connection_get_transport(connection));
311 if(phantom_connection == NULL)
313 if(!bus_connections_setup_connection(bus_connection_get_connections(connection), phantom_connection))
315 dbus_connection_unref_phantom(phantom_connection);
316 phantom_connection = NULL;
317 dbus_set_error (error, DBUS_ERROR_FAILED , "Name \"%s\" could not be acquired", unique_name);
320 if(!bus_connection_complete(phantom_connection, &name, error))
322 bus_connection_disconnected(phantom_connection);
323 phantom_connection = NULL;
327 _dbus_verbose ("Created phantom connection for %s\n", bus_connection_get_name(phantom_connection));
330 return phantom_connection;
333 dbus_bool_t register_kdbus_starters(DBusConnection* connection)
337 dbus_bool_t retval = FALSE;
340 if (!bus_activation_list_services (bus_connection_get_activation (connection), &services, &len))
343 _dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd);
347 if(!register_kdbus_policy(services[i], fd))
350 if (request_kdbus_name(fd, services[i], (DBUS_NAME_FLAG_ALLOW_REPLACEMENT | KDBUS_NAME_STARTER) , 0) < 0)
356 dbus_free_string_array (services);
361 static dbus_bool_t remove_conn_if_name_match (DBusConnection *connection, void *data)
363 if(!strcmp(bus_connection_get_name(connection), (char*)data))
365 bus_connection_disconnected(connection);
366 return FALSE; //this is to break foreach function
371 void handleNameOwnerChanged(DBusMessage *msg, BusTransaction *transaction, DBusConnection *connection)
373 const char *name, *old, *new;
375 if(!dbus_message_get_args(msg, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_STRING, &old, DBUS_TYPE_STRING, &new, DBUS_TYPE_INVALID))
377 _dbus_verbose ("Couldn't get args of NameOwnerChanged signal: .\n");//, error.message);
381 _dbus_verbose ("Got NameOwnerChanged signal:\nName: %s\nOld: %s\nNew: %s\n", name, old, new);
383 if(!strncmp(name, ":1.", 3))/*if it starts from :1. it is unique name - this might be IdRemoved info*/
385 if(!strcmp(name, old)) //yes it is - someone has disconnected
387 DBusConnection* conn;
389 conn = bus_connections_find_conn_by_name(bus_connection_get_connections(connection), name);
391 bus_connection_disconnected(conn);
394 else //it is well-known name
396 if((*old != 0) && (strcmp(old, ":1.1")))
398 DBusMessage *message;
400 if(bus_connections_find_conn_by_name(bus_connection_get_connections(connection), old) == NULL)
403 _dbus_verbose ("Owner '%s' lost name '%s'. Sending NameLost.\n", old, name);
405 message = dbus_message_new_signal (DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS, "NameLost");
409 if (!dbus_message_set_destination (message, old) || !dbus_message_append_args (message,
410 DBUS_TYPE_STRING, &name,
413 dbus_message_unref (message);
417 bus_transaction_send_from_driver (transaction, connection, message);
418 dbus_message_unref (message);
421 if((*new != 0) && (strcmp(new, ":1.1")))
423 DBusMessage *message;
425 _dbus_verbose ("Owner '%s' acquired name '%s'. Sending NameAcquired.\n", new, name);
427 message = dbus_message_new_signal (DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS, "NameAcquired");
431 if (!dbus_message_set_destination (message, new) || !dbus_message_append_args (message,
432 DBUS_TYPE_STRING, &name,
435 dbus_message_unref (message);
439 bus_transaction_send_from_driver (transaction, connection, message);
440 dbus_message_unref (message);