1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2 /* kdbus-d.c kdbus related daemon functions
4 * Copyright (C) 2013 Samsung Electronics
6 * Licensed under the Academic Free License version 2.1
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version and under the terms of the GNU
12 * Lesser General Public License as published by the
13 * Free Software Foundation; either version 2.1 of the License, or (at
14 * your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 #include <dbus/dbus-connection-internal.h>
29 #include <dbus/kdbus.h>
30 #include <dbus/dbus-bus.h>
32 #include <dbus/kdbus-common.h>
33 #include <dbus/dbus-transport.h>
34 #include <dbus/dbus-transport-kdbus.h>
35 #include "connection.h"
36 #include "activation.h"
46 __u64 sender_name_to_id(const char* name, DBusError* error)
50 if(!strncmp(name, ":1.", 3)) /*if name is unique name it must be converted to unique id*/
51 sender_id = strtoull(&name[3], NULL, 10);
53 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, "Could not convert sender of the message into kdbus unique id");
58 char* make_kdbus_bus(DBusBusType type, DBusError *error)
61 struct kdbus_cmd_bus_make head;
65 } __attribute__ ((__aligned__(8))) bus_make;
70 _dbus_verbose("Opening /dev/kdbus/control\n");
71 fdc = open("/dev/kdbus/control", O_RDWR|O_CLOEXEC);
74 _dbus_verbose("--- error %d (%m)\n", fdc);
75 dbus_set_error(error, DBUS_ERROR_FAILED, "Opening /dev/kdbus/control failed: %d (%m)", fdc);
79 memset(&bus_make, 0, sizeof(bus_make));
80 bus_make.head.bloom_size = 64;
81 bus_make.head.flags = KDBUS_MAKE_ACCESS_WORLD;
83 if(type == DBUS_BUS_SYSTEM)
84 snprintf(bus_make.name, sizeof(bus_make.name), "%u-kdbus-%s", getuid(), "system");
85 else if(type == DBUS_BUS_SESSION)
86 snprintf(bus_make.name, sizeof(bus_make.name), "%u-kdbus", getuid());
88 snprintf(bus_make.name, sizeof(bus_make.name), "%u-kdbus-%u", getuid(), getpid());
90 bus_make.n_type = KDBUS_MAKE_NAME;
91 bus_make.n_size = KDBUS_PART_HEADER_SIZE + strlen(bus_make.name) + 1;
92 bus_make.head.size = sizeof(struct kdbus_cmd_bus_make) + bus_make.n_size;
94 _dbus_verbose("Creating bus '%s'\n", bus_make.name);
95 ret = ioctl(fdc, KDBUS_CMD_BUS_MAKE, &bus_make);
98 _dbus_verbose("--- error %d (%m)\n", ret);
99 dbus_set_error(error, DBUS_ERROR_FAILED, "Creating bus '%s' failed: %d (%m)", bus_make.name, fdc);
103 if (asprintf(&bus, "kdbus:path=/dev/kdbus/%s/bus", bus_make.name) < 0)
109 _dbus_verbose("Return value '%s'\n", bus);
113 DBusServer* empty_server_init(char* address)
115 return dbus_server_init_mini(address);
118 DBusConnection* daemon_as_client(DBusBusType type, char* address, DBusError *error)
120 DBusConnection* connection;
122 dbus_bus_set_bus_connection_address(type, address);
124 connection = dbus_bus_get_private(type, error); /*todo possibly could be optimised by using lower functions*/
125 if(connection == NULL)
128 if(!add_match_kdbus (dbus_connection_get_transport(connection), 1, "member='IdRemoved'"))
130 dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match for id:1, %s", _dbus_strerror_from_errno ());
133 if(!add_match_kdbus (dbus_connection_get_transport(connection), 1, "member='NameChanged'"))
135 dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match for id:1, %s", _dbus_strerror_from_errno ());
138 if(!add_match_kdbus (dbus_connection_get_transport(connection), 1, "member='NameLost'"))
140 dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match for id:1, %s", _dbus_strerror_from_errno ());
143 if(!add_match_kdbus (dbus_connection_get_transport(connection), 1, "member='NameAcquired'"))
145 dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match for id:1, %s", _dbus_strerror_from_errno ());
149 if(dbus_error_is_set(error))
152 _dbus_connection_close_possibly_shared (connection);
153 dbus_connection_unref (connection);
157 _dbus_verbose ("Daemon connected as kdbus client.\n");
162 dbus_bool_t register_daemon_name(DBusConnection* connection)
164 DBusString daemon_name;
165 dbus_bool_t retval = FALSE;
166 BusTransaction *transaction;
168 _dbus_string_init_const(&daemon_name, DBUS_SERVICE_DBUS);
169 if(!kdbus_register_policy (&daemon_name, connection))
172 if(kdbus_request_name(connection, &daemon_name, 0, 0) != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER)
175 transaction = bus_transaction_new (bus_connection_get_context(connection));
176 if (transaction == NULL)
178 kdbus_release_name(connection, &daemon_name, 0);
182 if(!bus_registry_ensure (bus_connection_get_registry (connection), &daemon_name, connection, 0, transaction, NULL))
184 kdbus_release_name(connection, &daemon_name, 0);
191 bus_transaction_free(transaction);
195 dbus_bool_t kdbus_register_policy (const DBusString *service_name, DBusConnection* connection)
199 _dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd);
201 return register_kdbus_policy(_dbus_string_get_const_data(service_name), fd);
204 dbus_uint32_t kdbus_request_name(DBusConnection* connection, const DBusString *service_name, dbus_uint32_t flags, __u64 sender_id)
208 _dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd);
210 return request_kdbus_name(fd, _dbus_string_get_const_data(service_name), flags, sender_id);
213 dbus_uint32_t kdbus_release_name(DBusConnection* connection, const DBusString *service_name, __u64 sender_id)
217 _dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd);
219 return release_kdbus_name(fd, _dbus_string_get_const_data(service_name), sender_id);
222 dbus_bool_t kdbus_list_services (DBusConnection* connection, char ***listp, int *array_len)
226 _dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd);
228 return list_kdbus_names(fd, listp, array_len);
231 dbus_bool_t kdbus_add_match_rule (DBusConnection* connection, DBusMessage* message, const char* text, DBusError* error)
235 sender_id = sender_name_to_id(dbus_message_get_sender(message), error);
236 if(dbus_error_is_set(error))
239 if(!add_match_kdbus (dbus_connection_get_transport(connection), sender_id, text))
241 dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match for id:%d, %s",
242 sender_id, _dbus_strerror_from_errno ());
249 dbus_bool_t kdbus_remove_match (DBusConnection* connection, DBusMessage* message, DBusError* error)
253 sender_id = sender_name_to_id(dbus_message_get_sender(message), error);
254 if(dbus_error_is_set(error))
257 if(!remove_match_kdbus (dbus_connection_get_transport(connection), sender_id))
259 dbus_set_error (error, _dbus_error_from_errno (errno), "Could not remove match rules for id:%d", sender_id);
266 dbus_bool_t kdbus_get_connection_unix_user(DBusConnection* connection, DBusMessage* message, unsigned long* uid, DBusError* error)
269 struct nameInfo info;
271 dbus_bool_t ret = FALSE;
273 dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID);
274 inter_ret = kdbus_NameQuery(name, dbus_connection_get_transport(connection), &info);
275 if(inter_ret == 0) //name found
277 _dbus_verbose("User id:%llu\n", (unsigned long long) info.userId);
281 else if(inter_ret == -ENOENT) //name has no owner
282 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not get UID of name '%s': no such name", name);
285 _dbus_verbose("kdbus error determining UID: err %d (%m)\n", errno);
286 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not determine UID for '%s'", name);
292 dbus_bool_t kdbus_get_connection_unix_process_id(DBusConnection* connection, DBusMessage* message, unsigned long* pid, DBusError* error)
295 struct nameInfo info;
297 dbus_bool_t ret = FALSE;
299 dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID);
300 inter_ret = kdbus_NameQuery(name, dbus_connection_get_transport(connection), &info);
301 if(inter_ret == 0) //name found
303 _dbus_verbose("Process id:%llu\n", (unsigned long long) info.processId);
304 *pid = info.processId;
307 else if(inter_ret == -ENOENT) //name has no owner
308 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not get PID of name '%s': no such name", name);
311 _dbus_verbose("kdbus error determining PID: err %d (%m)\n", errno);
312 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not determine PID for '%s'", name);
318 dbus_bool_t kdbus_get_connection_unix_selinux_security_context(DBusConnection* connection, DBusMessage* message, DBusMessage* reply, DBusError* error)
321 struct nameInfo info;
323 dbus_bool_t ret = FALSE;
325 dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID);
326 inter_ret = kdbus_NameQuery(name, dbus_connection_get_transport(connection), &info);
327 if(inter_ret == -ENOENT) //name has no owner
328 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not get security context of name '%s': no such name", name);
329 else if(inter_ret < 0)
331 _dbus_verbose("kdbus error determining security context: err %d (%m)\n", errno);
332 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not determine security context for '%s'", name);
336 if (!dbus_message_append_args (reply, DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE, &info.sec_label, info.sec_label_len, DBUS_TYPE_INVALID))
338 _DBUS_SET_OOM (error);
347 DBusConnection* create_phantom_connection(DBusConnection* connection, const char* unique_name, DBusError* error)
349 DBusConnection *phantom_connection;
352 _dbus_string_init_const(&name, unique_name);
354 phantom_connection = _dbus_connection_new_for_used_transport (dbus_connection_get_transport(connection));
355 if(phantom_connection == NULL)
357 if(!bus_connections_setup_connection(bus_connection_get_connections(connection), phantom_connection))
359 dbus_connection_unref_phantom(phantom_connection);
360 phantom_connection = NULL;
361 dbus_set_error (error, DBUS_ERROR_FAILED , "Name \"%s\" could not be acquired", unique_name);
364 if(!bus_connection_complete(phantom_connection, &name, error))
366 bus_connection_disconnected(phantom_connection);
367 phantom_connection = NULL;
371 _dbus_verbose ("Created phantom connection for %s\n", bus_connection_get_name(phantom_connection));
374 return phantom_connection;
377 dbus_bool_t register_kdbus_starters(DBusConnection* connection)
381 dbus_bool_t retval = FALSE;
383 BusTransaction *transaction;
386 transaction = bus_transaction_new (bus_connection_get_context(connection));
387 if (transaction == NULL)
390 if (!bus_activation_list_services (bus_connection_get_activation (connection), &services, &len))
393 _dbus_transport_get_socket_fd (dbus_connection_get_transport(connection), &fd);
394 _dbus_string_init(&name);
398 if(!register_kdbus_policy(services[i], fd))
401 if (request_kdbus_name(fd, services[i], (DBUS_NAME_FLAG_ALLOW_REPLACEMENT | KDBUS_NAME_STARTER) , 0) < 0)
404 if(!_dbus_string_append(&name, services[i]))
406 if(!bus_registry_ensure (bus_connection_get_registry (connection), &name, connection,
407 (DBUS_NAME_FLAG_ALLOW_REPLACEMENT | KDBUS_NAME_STARTER), transaction, NULL))
409 if(!_dbus_string_set_length(&name, 0))
418 release_kdbus_name(fd, services[j], 0);
420 dbus_free_string_array (services);
421 _dbus_string_free(&name);
422 bus_transaction_free(transaction);
426 dbus_bool_t update_kdbus_starters(DBusConnection* connection)
428 dbus_bool_t retval = FALSE;
429 DBusList **services_old;
431 BusService *service = NULL;
432 BusTransaction *transaction;
435 transaction = bus_transaction_new (bus_connection_get_context(connection));
436 if (transaction == NULL)
439 if(!_dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd))
442 services_old = bus_connection_get_services_owned(connection);
443 link = _dbus_list_get_first_link(services_old);
444 link = _dbus_list_get_next_link (services_old, link); //skip org.freedesktop.DBus which is not starter
450 service = (BusService*) link->data;
454 ret = release_kdbus_name(fd, bus_service_get_name(service), 0);
456 if (ret == DBUS_RELEASE_NAME_REPLY_RELEASED)
458 if(!bus_service_remove_owner(service, connection, transaction, NULL))
459 _dbus_verbose ("Unable to remove\n");
464 link = _dbus_list_get_next_link (services_old, link);
467 if(!register_kdbus_starters(connection))
469 _dbus_verbose ("Registering kdbus starters for dbus activatable names failed!\n");
475 bus_transaction_free(transaction);
480 static dbus_bool_t remove_conn_if_name_match (DBusConnection *connection, void *data)
482 if(!strcmp(bus_connection_get_name(connection), (char*)data))
484 bus_connection_disconnected(connection);
485 return FALSE; //this is to break foreach function
490 void handleNameOwnerChanged(DBusMessage *msg, BusTransaction *transaction, DBusConnection *connection)
492 const char *name, *old, *new;
494 if(!dbus_message_get_args(msg, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_STRING, &old, DBUS_TYPE_STRING, &new, DBUS_TYPE_INVALID))
496 _dbus_verbose ("Couldn't get args of NameOwnerChanged signal: .\n");//, error.message);
500 _dbus_verbose ("Got NameOwnerChanged signal:\nName: %s\nOld: %s\nNew: %s\n", name, old, new);
502 if(!strncmp(name, ":1.", 3))/*if it starts from :1. it is unique name - this might be IdRemoved info*/
504 if(!strcmp(name, old)) //yes it is - someone has disconnected
506 DBusConnection* conn;
508 conn = bus_connections_find_conn_by_name(bus_connection_get_connections(connection), name);
510 bus_connection_disconnected(conn);
513 else //it is well-known name
515 if((*old != 0) && (strcmp(old, ":1.1")))
517 DBusMessage *message;
519 if(bus_connections_find_conn_by_name(bus_connection_get_connections(connection), old) == NULL)
522 _dbus_verbose ("Owner '%s' lost name '%s'. Sending NameLost.\n", old, name);
524 message = dbus_message_new_signal (DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS, "NameLost");
528 if (!dbus_message_set_destination (message, old) || !dbus_message_append_args (message,
529 DBUS_TYPE_STRING, &name,
532 dbus_message_unref (message);
536 bus_transaction_send_from_driver (transaction, connection, message);
537 dbus_message_unref (message);
540 if((*new != 0) && (strcmp(new, ":1.1")))
542 DBusMessage *message;
544 _dbus_verbose ("Owner '%s' acquired name '%s'. Sending NameAcquired.\n", new, name);
546 message = dbus_message_new_signal (DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS, "NameAcquired");
550 if (!dbus_message_set_destination (message, new) || !dbus_message_append_args (message,
551 DBUS_TYPE_STRING, &name,
554 dbus_message_unref (message);
558 bus_transaction_send_from_driver (transaction, connection, message);
559 dbus_message_unref (message);