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>
30 #include <dbus/kdbus.h>
31 #include <dbus/dbus-bus.h>
33 #include <dbus/kdbus-common.h>
34 #include <dbus/dbus-transport.h>
35 #include <dbus/dbus-transport-kdbus.h>
36 #include "connection.h"
37 #include "activation.h"
39 #include <dbus/dbus-connection.h>
49 * Converts string with unique name into __u64 id number. If the name is not unique, sets error.
51 __u64 sender_name_to_id(const char* name, DBusError* error)
55 if(!strncmp(name, ":1.", 3)) /*if name is unique name it must be converted to unique id*/
56 sender_id = strtoull(&name[3], NULL, 10);
58 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, "Could not convert sender of the message into kdbus unique id");
64 * Seeks key in rule string, and duplicates value of the key into pValue.
65 * Because of the duplication, pValue must be freed after use.
67 * @param rule rule to look through
68 * @param key key to look for
69 * @param pValue pointer to value of the key found
70 * @return length of the value string, 0 means not found
72 static int parse_match_key(const char *rule, const char* key, char** pValue)
75 const char* pValueEnd;
78 pBegin = strstr(rule, key);
81 pBegin += strlen(key);
82 pValueEnd = strchr(pBegin, '\'');
85 value_length = pValueEnd - pBegin;
86 *pValue = strndup(pBegin, value_length);
88 _dbus_verbose ("found for key: %s value:'%s'\n", key, *pValue);
95 * Adds a match rule to match broadcast messages going through the message bus.
96 * Do no affect messages addressed directly.
98 * The "rule" argument is the string form of a match rule.
100 * Only part of the dbus's matching capabilities is implemented in kdbus now, because of different mechanism.
102 * interface match key mapped to bloom
103 * sender match key mapped to src_name
105 * @param transport transport
106 * @param id id of connection for which the rule is to be added
107 * @param rule textual form of match rule
109 dbus_bool_t add_match_kdbus (DBusTransport* transport, __u64 id, const char *rule)
111 struct kdbus_cmd_match* pCmd_match;
112 struct kdbus_item *pItem;
113 __u64 src_id = KDBUS_MATCH_SRC_ID_ANY;
117 char* pInterface = NULL;
118 dbus_bool_t ret_value = FALSE;
122 if(!_dbus_transport_get_socket_fd(transport, &fd))
125 bloom_size = dbus_transport_get_bloom_size(transport);
127 /*parsing rule and calculating size of command*/
128 size = sizeof(struct kdbus_cmd_match);
129 if(parse_match_key(rule, "interface='", &pInterface)) /*actual size is not important for interface because bloom size is defined by bus*/
130 size += KDBUS_PART_HEADER_SIZE + bloom_size;
131 name_size = parse_match_key(rule, "sender='", &pName);
134 if(!strncmp(pName, ":1.", 3)) /*if name is unique name it must be converted to unique id*/
136 src_id = strtoull(&pName[3], NULL, 10);
141 size += KDBUS_ITEM_SIZE(name_size + 1); //well known name
144 pCmd_match = alloca(size);
145 if(pCmd_match == NULL)
149 pCmd_match->cookie = id;
150 pCmd_match->size = size;
151 pCmd_match->src_id = src_id;
153 pItem = pCmd_match->items;
156 pItem->type = KDBUS_MATCH_SRC_NAME;
157 pItem->size = KDBUS_PART_HEADER_SIZE + name_size + 1;
158 memcpy(pItem->str, pName, strlen(pName) + 1);
159 pItem = KDBUS_PART_NEXT(pItem);
163 pItem->type = KDBUS_MATCH_BLOOM;
164 pItem->size = KDBUS_PART_HEADER_SIZE + bloom_size;
165 strncpy(pItem->data, pInterface, bloom_size);
168 if(ioctl(fd, KDBUS_CMD_MATCH_ADD, pCmd_match))
169 _dbus_verbose("Failed adding match bus rule %s,\nerror: %d, %m\n", rule, errno);
172 _dbus_verbose("Added match bus rule %s for id:%llu\n", rule, (unsigned long long)id);
185 * Opposing to dbus, in kdbus removes all match rules with given
186 * cookie, which in this implementation is equal to uniqe id.
188 * @param transport transport
189 * @param id connection id for which rules are to be removed
191 dbus_bool_t remove_match_kdbus (DBusTransport* transport, __u64 id)
193 struct kdbus_cmd_match __attribute__ ((__aligned__(8))) cmd;
196 if(!_dbus_transport_get_socket_fd(transport, &fd))
201 cmd.size = sizeof(struct kdbus_cmd_match);
203 if(ioctl(fd, KDBUS_CMD_MATCH_REMOVE, &cmd))
205 _dbus_verbose("Failed removing match rule for id: %llu; error: %d, %m\n", (unsigned long long)id, errno);
210 _dbus_verbose("Match rule removed correctly.\n");
216 * Performs kdbus query of id of the given name
218 * @param name name to query for
219 * @param transport transport
220 * @param pInfo nameInfo structure address to store info about the name
221 * @return 0 on success, -errno if failed
223 int kdbus_NameQuery(const char* name, DBusTransport* transport, struct nameInfo* pInfo)
225 struct kdbus_cmd_name_info *msg;
226 struct kdbus_item *item;
232 pInfo->sec_label_len = 0;
233 pInfo->sec_label = NULL;
235 if(!_dbus_transport_get_socket_fd(transport, &fd))
238 item_size = KDBUS_PART_HEADER_SIZE + strlen(name) + 1;
239 item_size = (item_size < 56) ? 56 : item_size; //at least 56 bytes are needed by kernel to place info about name, otherwise error
240 size = sizeof(struct kdbus_cmd_name_info) + item_size;
245 _dbus_verbose("Error allocating memory for: %s,%s\n", _dbus_strerror (errno), _dbus_error_from_errno (errno));
249 memset(msg, 0, size);
251 if((name[0] == ':') && (name[1] == '1') && (name[2] == '.')) /* if name starts with ":1." it is a unique name and should be send as number */
252 msg->id = strtoull(&name[3], NULL, 10);
257 item->type = KDBUS_NAME_INFO_ITEM_NAME;
258 item->size = item_size;
259 memcpy(item->str, name, strlen(name) + 1);
262 ret = ioctl(fd, KDBUS_CMD_NAME_QUERY, msg);
269 else if(ret == -ENOBUFS)
271 msg = realloc(msg, msg->size); //prepare memory
280 pInfo->uniqueId = msg->id;
281 pInfo->userId = msg->creds.uid;
282 pInfo->processId = msg->creds.pid;
284 while((uint8_t *)(item) < (uint8_t *)(msg) + msg->size)
286 if(item->type == KDBUS_NAME_INFO_ITEM_SECLABEL)
288 pInfo->sec_label_len = item->size - KDBUS_PART_HEADER_SIZE - 1;
289 if(pInfo->sec_label_len != 0)
291 pInfo->sec_label = malloc(pInfo->sec_label_len);
292 if(pInfo->sec_label == NULL)
295 memcpy(pInfo->sec_label, item->data, pInfo->sec_label_len);
299 item = KDBUS_PART_NEXT(item);
308 * Creates kdbus bus of given type.
310 char* make_kdbus_bus(DBusBusType type, const char* address, DBusError *error)
313 struct kdbus_cmd_bus_make head;
317 } __attribute__ ((__aligned__(8))) bus_make;
323 _dbus_verbose("Opening /dev/kdbus/control\n");
324 fdc = open("/dev/kdbus/control", O_RDWR|O_CLOEXEC);
327 _dbus_verbose("--- error %d (%m)\n", fdc);
328 dbus_set_error(error, DBUS_ERROR_FAILED, "Opening /dev/kdbus/control failed: %d (%m)", fdc);
332 addr_value = strchr(address, ':') + 1;
334 memset(&bus_make, 0, sizeof(bus_make));
335 bus_make.head.bloom_size = 64;
336 bus_make.head.flags = KDBUS_MAKE_ACCESS_WORLD;
337 if(!strcmp(addr_value, "sbb"))
338 bus_make.head.flags |= KDBUS_MAKE_SBB_OFFSET;
340 if(type == DBUS_BUS_SYSTEM)
341 snprintf(bus_make.name, sizeof(bus_make.name), "%u-kdbus-%s", getuid(), "system");
342 else if(type == DBUS_BUS_SESSION)
343 snprintf(bus_make.name, sizeof(bus_make.name), "%u-kdbus", getuid());
345 snprintf(bus_make.name, sizeof(bus_make.name), "%u-kdbus-%u", getuid(), getpid());
347 bus_make.n_type = KDBUS_MAKE_NAME;
348 bus_make.n_size = KDBUS_PART_HEADER_SIZE + strlen(bus_make.name) + 1;
349 bus_make.head.size = sizeof(struct kdbus_cmd_bus_make) + bus_make.n_size;
351 _dbus_verbose("Creating bus '%s'\n", bus_make.name);
352 ret = ioctl(fdc, KDBUS_CMD_BUS_MAKE, &bus_make);
355 _dbus_verbose("--- error %d (%m)\n", ret);
356 dbus_set_error(error, DBUS_ERROR_FAILED, "Creating bus '%s' failed: %d (%m)", bus_make.name, fdc);
360 if (asprintf(&bus, "kdbus:path=/dev/kdbus/%s/bus", bus_make.name) < 0)
366 _dbus_verbose("Return value '%s'\n", bus);
371 * Minimal server init needed by context to go further.
373 DBusServer* empty_server_init(char* address)
375 return dbus_server_init_mini(address);
378 static dbus_bool_t add_matches_for_kdbus_broadcasts(DBusConnection* connection)
380 struct kdbus_cmd_match* pCmd_match;
381 struct kdbus_item *pItem;
384 DBusTransport *transport;
385 const char* unique_name;
387 transport = dbus_connection_get_transport(connection);
389 if(!_dbus_transport_get_socket_fd(transport, &fd))
395 size = sizeof(struct kdbus_cmd_match);
396 size += KDBUS_ITEM_SIZE(1)*3 + KDBUS_ITEM_SIZE(sizeof(__u64))*2; /*3 name related items plus 2 id related items*/
398 pCmd_match = alloca(size);
399 if(pCmd_match == NULL)
405 unique_name = dbus_bus_get_unique_name(connection);
407 pCmd_match->id = strtoull(&unique_name[3], NULL, 10);
408 pCmd_match->cookie = 1;
409 pCmd_match->size = size;
411 pItem = pCmd_match->items;
412 pCmd_match->src_id = 0;
413 pItem->type = KDBUS_MATCH_NAME_CHANGE;
414 pItem->size = KDBUS_PART_HEADER_SIZE + 1;
415 pItem = KDBUS_PART_NEXT(pItem);
416 pItem->type = KDBUS_MATCH_NAME_ADD;
417 pItem->size = KDBUS_PART_HEADER_SIZE + 1;
418 pItem = KDBUS_PART_NEXT(pItem);
419 pItem->type = KDBUS_MATCH_NAME_REMOVE;
420 pItem->size = KDBUS_PART_HEADER_SIZE + 1;
421 pItem = KDBUS_PART_NEXT(pItem);
422 pItem->type = KDBUS_MATCH_ID_ADD;
423 pItem->size = KDBUS_PART_HEADER_SIZE + sizeof(__u64);
424 pItem = KDBUS_PART_NEXT(pItem);
425 pItem->type = KDBUS_MATCH_ID_REMOVE;
426 pItem->size = KDBUS_PART_HEADER_SIZE + sizeof(__u64);
428 if(ioctl(fd, KDBUS_CMD_MATCH_ADD, pCmd_match))
430 _dbus_verbose("Failed adding match rule for daemon, error: %d, %m\n", errno);
434 _dbus_verbose("Added match rule for daemon correctly.\n");
439 * Connects daemon to bus created by him and adds matches for "system" broadcasts.
440 * Do not requests org.freedesktop.DBus name, because it's to early
441 * (some structures of BusContext are not ready yet).
443 DBusConnection* daemon_as_client(DBusBusType type, char* address, DBusError *error)
445 DBusConnection* connection;
447 dbus_bus_set_bus_connection_address(type, address);
449 connection = dbus_bus_get_private(type, error); /*todo possibly could be optimised by using lower functions*/
450 if(connection == NULL)
453 if(!add_matches_for_kdbus_broadcasts(connection))
455 dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match for daemon, %s", _dbus_strerror_from_errno ());
459 if(dbus_error_is_set(error))
462 _dbus_connection_close_possibly_shared (connection);
463 dbus_connection_unref (connection);
467 _dbus_verbose ("Daemon connected as kdbus client.\n");
473 * Asks bus for org.freedesktop.DBus well-known name.
475 dbus_bool_t register_daemon_name(DBusConnection* connection)
477 DBusString daemon_name;
478 dbus_bool_t retval = FALSE;
479 BusTransaction *transaction;
481 _dbus_string_init_const(&daemon_name, DBUS_SERVICE_DBUS);
482 if(!register_kdbus_policy(DBUS_SERVICE_DBUS, dbus_connection_get_transport(connection), geteuid()))
485 if(kdbus_request_name(connection, &daemon_name, 0, 0) != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER)
488 transaction = bus_transaction_new (bus_connection_get_context(connection));
489 if (transaction == NULL)
491 kdbus_release_name(connection, &daemon_name, 0);
495 if(!bus_registry_ensure (bus_connection_get_registry (connection), &daemon_name, connection, 0, transaction, NULL))
497 kdbus_release_name(connection, &daemon_name, 0);
504 bus_transaction_cancel_and_free(transaction);
508 dbus_uint32_t kdbus_request_name(DBusConnection* connection, const DBusString *service_name, dbus_uint32_t flags, __u64 sender_id)
512 _dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd);
514 return request_kdbus_name(fd, _dbus_string_get_const_data(service_name), flags, sender_id);
517 dbus_uint32_t kdbus_release_name(DBusConnection* connection, const DBusString *service_name, __u64 sender_id)
521 _dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd);
523 return release_kdbus_name(fd, _dbus_string_get_const_data(service_name), sender_id);
527 * Asks kdbus for well-known names registered on the bus
529 dbus_bool_t kdbus_list_services (DBusConnection* connection, char ***listp, int *array_len)
532 struct kdbus_cmd_names* pCmd;
534 dbus_bool_t ret_val = FALSE;
540 cmd_size = sizeof(struct kdbus_cmd_names) + KDBUS_ITEM_SIZE(1);
541 pCmd = malloc(cmd_size);
544 pCmd->size = cmd_size;
546 _dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd);
550 if(ioctl(fd, KDBUS_CMD_NAME_LIST, pCmd))
554 if(errno == ENOBUFS) //buffer to small to put all names into it
555 cmd_size = pCmd->size; //here kernel tells how much memory it needs
558 _dbus_verbose("kdbus error asking for name list: err %d (%m)\n",errno);
562 if(cmd_size) //kernel needs more memory
564 pCmd = realloc(pCmd, cmd_size); //prepare memory
567 goto again; //and try again
571 struct kdbus_cmd_name* pCmd_name;
573 for (pCmd_name = pCmd->names; (uint8_t *)(pCmd_name) < (uint8_t *)(pCmd) + pCmd->size; pCmd_name = KDBUS_PART_NEXT(pCmd_name))
576 list = malloc(sizeof(char*) * (list_len + 1));
580 for (pCmd_name = pCmd->names; (uint8_t *)(pCmd_name) < (uint8_t *)(pCmd) + pCmd->size; pCmd_name = KDBUS_PART_NEXT(pCmd_name))
582 list[i] = strdup(pCmd_name->name);
590 _dbus_verbose ("Name %d: %s\n", i, list[i]);
596 *array_len = list_len;
607 * Asks kdbus for list of connections being in the queue to own
608 * given well-known name. The list includes the owner of the name on the
611 dbus_bool_t kdbus_list_queued (DBusConnection *connection, DBusList **return_list,
612 const char *name, DBusError *error)
615 struct kdbus_cmd_names* pCmd;
617 dbus_bool_t ret_val = FALSE;
620 _dbus_assert (*return_list == NULL);
622 name_length = strlen(name) + 1;
623 cmd_size = sizeof(struct kdbus_cmd_names) + sizeof(struct kdbus_cmd_name) + name_length;
624 pCmd = malloc(cmd_size);
627 pCmd->size = cmd_size;
628 pCmd->names[0].id = 0;
629 pCmd->names[0].size = sizeof(struct kdbus_cmd_name) + name_length;
630 memcpy(pCmd->names[0].name, name, name_length);
631 _dbus_verbose ("Asking for queued owners of %s\n", pCmd->names[0].name);
633 _dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd);
637 if(ioctl(fd, KDBUS_CMD_NAME_LIST_QUEUED, pCmd))
641 if(errno == ENOBUFS) //buffer to small to put all names into it
642 cmd_size = pCmd->size; //here kernel tells how much memory it needs
643 else if(errno == ENOENT)
645 dbus_set_error (error, DBUS_ERROR_NAME_HAS_NO_OWNER,
646 "Could not get owners of name '%s': no such name", name);
652 _dbus_verbose("kdbus error asking for queued owners list: err %d (%m)\n",errno);
656 if(cmd_size) //kernel needs more memory
658 pCmd = realloc(pCmd, cmd_size); //prepare memory
661 goto again; //and try again
665 struct kdbus_cmd_name* pCmd_name;
667 for (pCmd_name = pCmd->names; (uint8_t *)(pCmd_name) < (uint8_t *)(pCmd) + pCmd->size; pCmd_name = KDBUS_PART_NEXT(pCmd_name))
671 _dbus_verbose ("Got queued owner id: %llu\n", (unsigned long long)pCmd_name->id);
672 uname = malloc(snprintf(uname, 0, ":1.%llu0", (unsigned long long)pCmd_name->id));
675 sprintf(uname, ":1.%llu", (unsigned long long int)pCmd_name->id);
676 if (!_dbus_list_append (return_list, uname))
690 dbus_set_error (error, _dbus_error_from_errno (errno),
691 "Failed to list queued owners of \"%s\": %s",
692 name, _dbus_strerror (errno));
694 link = _dbus_list_get_first_link (return_list);
697 DBusList *next = _dbus_list_get_next_link (return_list, link);
699 if(link->data != NULL)
702 _dbus_list_free_link (link);
711 * Register match rule in kdbus on behalf of sender of the message
713 dbus_bool_t kdbus_add_match_rule (DBusConnection* connection, DBusMessage* message, const char* text, DBusError* error)
717 sender_id = sender_name_to_id(dbus_message_get_sender(message), error);
718 if(dbus_error_is_set(error))
721 if(!add_match_kdbus (dbus_connection_get_transport(connection), sender_id, text))
723 dbus_set_error (error, _dbus_error_from_errno (errno), "Could not add match for id:%d, %s",
724 sender_id, _dbus_strerror_from_errno ());
732 * Removes match rule in kdbus on behalf of sender of the message
734 dbus_bool_t kdbus_remove_match (DBusConnection* connection, DBusMessage* message, DBusError* error)
738 sender_id = sender_name_to_id(dbus_message_get_sender(message), error);
739 if(dbus_error_is_set(error))
742 if(!remove_match_kdbus (dbus_connection_get_transport(connection), sender_id))
744 dbus_set_error (error, _dbus_error_from_errno (errno), "Could not remove match rules for id:%d", sender_id);
751 int kdbus_get_name_owner(DBusConnection* connection, const char* name, char* owner)
754 struct nameInfo info;
756 ret = kdbus_NameQuery(name, dbus_connection_get_transport(connection), &info);
757 if(ret == 0) //unique id of the name
759 sprintf(owner, ":1.%llu", (unsigned long long int)info.uniqueId);
760 _dbus_verbose("Unique name discovered:%s\n", owner);
762 else if(ret != -ENOENT)
763 _dbus_verbose("kdbus error sending name query: err %d (%m)\n", errno);
769 * Asks kdbus for uid of the owner of the name given in the message
771 dbus_bool_t kdbus_get_unix_user(DBusConnection* connection, const char* name, unsigned long* uid, DBusError* error)
773 struct nameInfo info;
775 dbus_bool_t ret = FALSE;
777 inter_ret = kdbus_NameQuery(name, dbus_connection_get_transport(connection), &info);
778 if(inter_ret == 0) //name found
780 _dbus_verbose("User id:%llu\n", (unsigned long long) info.userId);
784 else if(inter_ret == -ENOENT) //name has no owner
786 _dbus_verbose ("Name %s has no owner.\n", name);
787 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not get UID of name '%s': no such name", name);
792 _dbus_verbose("kdbus error determining UID: err %d (%m)\n", errno);
793 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not determine UID for '%s'", name);
800 * Asks kdbus for pid of the owner of the name given in the message
802 dbus_bool_t kdbus_get_connection_unix_process_id(DBusConnection* connection, const char* name, unsigned long* pid, DBusError* error)
804 struct nameInfo info;
806 dbus_bool_t ret = FALSE;
808 inter_ret = kdbus_NameQuery(name, dbus_connection_get_transport(connection), &info);
809 if(inter_ret == 0) //name found
811 _dbus_verbose("Process id:%llu\n", (unsigned long long) info.processId);
812 *pid = info.processId;
815 else if(inter_ret == -ENOENT) //name has no owner
816 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not get PID of name '%s': no such name", name);
819 _dbus_verbose("kdbus error determining PID: err %d (%m)\n", errno);
820 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not determine PID for '%s'", name);
827 * Asks kdbus for selinux_security_context of the owner of the name given in the message
829 dbus_bool_t kdbus_get_connection_unix_selinux_security_context(DBusConnection* connection, DBusMessage* message, DBusMessage* reply, DBusError* error)
832 struct nameInfo info;
834 dbus_bool_t ret = FALSE;
836 dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID);
837 inter_ret = kdbus_NameQuery(name, dbus_connection_get_transport(connection), &info);
838 if(inter_ret == -ENOENT) //name has no owner
839 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not get security context of name '%s': no such name", name);
840 else if(inter_ret < 0)
842 _dbus_verbose("kdbus error determining security context: err %d (%m)\n", errno);
843 dbus_set_error (error, DBUS_ERROR_FAILED, "Could not determine security context for '%s'", name);
847 if (!dbus_message_append_args (reply, DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE, &info.sec_label, info.sec_label_len, DBUS_TYPE_INVALID))
849 _DBUS_SET_OOM (error);
859 * Gets the UNIX user ID of the connection from kdbus, if known. Returns #TRUE if
860 * the uid is filled in. Always returns #FALSE on non-UNIX platforms
861 * for now., though in theory someone could hook Windows to NIS or
862 * something. Always returns #FALSE prior to authenticating the
865 * The UID of is only read by bus daemon from kdbus. You can not
866 * call this function from client side of the connection.
868 * You can ask the bus to tell you the UID of another connection though
869 * if you like; this is done with dbus_bus_get_unix_user().
871 * @param connection the connection
872 * @param uid return location for the user ID
873 * @returns #TRUE if uid is filled in with a valid user ID
876 dbus_connection_get_unix_user (DBusConnection *connection,
879 _dbus_return_val_if_fail (connection != NULL, FALSE);
880 _dbus_return_val_if_fail (uid != NULL, FALSE);
882 if(bus_context_is_kdbus(bus_connection_get_context (connection)))
883 return kdbus_get_unix_user(connection, bus_connection_get_name(connection), uid, NULL);
885 return dbus_connection_get_unix_user_dbus(connection, uid);
889 * Gets the process ID of the connection if any.
890 * Returns #TRUE if the pid is filled in.
892 * @param connection the connection
893 * @param pid return location for the process ID
894 * @returns #TRUE if uid is filled in with a valid process ID
897 dbus_connection_get_unix_process_id (DBusConnection *connection,
900 _dbus_return_val_if_fail (connection != NULL, FALSE);
901 _dbus_return_val_if_fail (pid != NULL, FALSE);
903 if(bus_context_is_kdbus(bus_connection_get_context (connection)))
904 return kdbus_get_connection_unix_process_id(connection, bus_connection_get_name(connection), pid, NULL);
906 return dbus_connection_get_unix_process_id_dbus(connection, pid);
910 * Create connection structure for given name. It is needed to control starters - activatable services
911 * and for ListQueued method (as long as kdbus is not supporting it). This connections don't have it's own
912 * fd so it is set up on the basis of daemon's transport. Functionality of such connection is limited.
914 DBusConnection* create_phantom_connection(DBusConnection* connection, const char* name, DBusError* error)
916 DBusConnection *phantom_connection;
919 _dbus_string_init_const(&Sname, name);
921 phantom_connection = _dbus_connection_new_for_used_transport (dbus_connection_get_transport(connection));
922 if(phantom_connection == NULL)
924 if(!bus_connections_setup_connection(bus_connection_get_connections(connection), phantom_connection))
926 dbus_connection_unref_phantom(phantom_connection);
927 phantom_connection = NULL;
928 dbus_set_error (error, DBUS_ERROR_FAILED , "Name \"%s\" could not be acquired", name);
931 if(!bus_connection_complete(phantom_connection, &Sname, error))
933 bus_connection_disconnected(phantom_connection);
934 phantom_connection = NULL;
938 _dbus_verbose ("Created phantom connection for %s\n", bus_connection_get_name(phantom_connection));
941 return phantom_connection;
945 * Registers activatable services as kdbus starters.
947 dbus_bool_t register_kdbus_starters(DBusConnection* connection)
951 dbus_bool_t retval = FALSE;
953 BusTransaction *transaction;
955 DBusTransport* transport;
956 unsigned long int euid;
958 transaction = bus_transaction_new (bus_connection_get_context(connection));
959 if (transaction == NULL)
962 if (!bus_activation_list_services (bus_connection_get_activation (connection), &services, &len))
965 transport = dbus_connection_get_transport(connection);
968 if(!_dbus_transport_get_socket_fd (transport, &fd))
971 _dbus_string_init(&name);
975 if(!register_kdbus_policy(services[i], transport, euid))
978 if (request_kdbus_name(fd, services[i], (DBUS_NAME_FLAG_ALLOW_REPLACEMENT | KDBUS_NAME_STARTER) , 0) < 0)
981 if(!_dbus_string_append(&name, services[i]))
983 if(!bus_registry_ensure (bus_connection_get_registry (connection), &name, connection,
984 (DBUS_NAME_FLAG_ALLOW_REPLACEMENT | KDBUS_NAME_STARTER), transaction, NULL))
986 if(!_dbus_string_set_length(&name, 0))
995 release_kdbus_name(fd, services[j], 0);
997 dbus_free_string_array (services);
998 _dbus_string_free(&name);
999 bus_transaction_cancel_and_free(transaction);
1004 * Updates kdbus starters (activatable services) after configuration was reloaded.
1005 * It releases all previous starters and registers all new.
1007 dbus_bool_t update_kdbus_starters(DBusConnection* connection)
1009 dbus_bool_t retval = FALSE;
1010 DBusList **services_old;
1012 BusService *service = NULL;
1013 BusTransaction *transaction;
1016 transaction = bus_transaction_new (bus_connection_get_context(connection));
1017 if (transaction == NULL)
1020 if(!_dbus_transport_get_socket_fd(dbus_connection_get_transport(connection), &fd))
1023 services_old = bus_connection_get_services_owned(connection);
1024 link = _dbus_list_get_first_link(services_old);
1025 link = _dbus_list_get_next_link (services_old, link); //skip org.freedesktop.DBus which is not starter
1027 while (link != NULL)
1031 service = (BusService*) link->data;
1035 ret = release_kdbus_name(fd, bus_service_get_name(service), 0);
1037 if (ret == DBUS_RELEASE_NAME_REPLY_RELEASED)
1039 if(!bus_service_remove_owner(service, connection, transaction, NULL))
1040 _dbus_verbose ("Unable to remove\n");
1045 link = _dbus_list_get_next_link (services_old, link);
1048 if(!register_kdbus_starters(connection))
1050 _dbus_verbose ("Registering kdbus starters for dbus activatable names failed!\n");
1056 bus_transaction_cancel_and_free(transaction);
1061 * Analyzes system broadcasts about id and name changes.
1062 * Basing on this it sends NameAcquired and NameLost signals and clear phantom connections.
1064 void handleNameOwnerChanged(DBusMessage *msg, BusTransaction *transaction, DBusConnection *connection)
1066 const char *name, *old, *new;
1068 if(!dbus_message_get_args(msg, NULL, DBUS_TYPE_STRING, &name, DBUS_TYPE_STRING, &old, DBUS_TYPE_STRING, &new, DBUS_TYPE_INVALID))
1070 _dbus_verbose ("Couldn't get args of NameOwnerChanged signal.\n");//, error.message);
1074 _dbus_verbose ("Got NameOwnerChanged signal:\nName: %s\nOld: %s\nNew: %s\n", name, old, new);
1076 if(!strncmp(name, ":1.", 3))/*if it starts from :1. it is unique name - this might be IdRemoved info*/
1078 if(!strcmp(name, old)) //yes it is - someone has disconnected
1080 DBusConnection* conn;
1082 conn = bus_connections_find_conn_by_name(bus_connection_get_connections(connection), name);
1084 bus_connection_disconnected(conn);
1087 else //it is well-known name
1089 if((*old != 0) && (strcmp(old, bus_connection_get_name(connection))))
1091 DBusMessage *message;
1093 if(bus_connections_find_conn_by_name(bus_connection_get_connections(connection), old) == NULL)
1096 _dbus_verbose ("Owner '%s' lost name '%s'. Sending NameLost.\n", old, name);
1098 message = dbus_message_new_signal (DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS, "NameLost");
1099 if (message == NULL)
1102 if (!dbus_message_set_destination (message, old) || !dbus_message_append_args (message,
1103 DBUS_TYPE_STRING, &name,
1106 dbus_message_unref (message);
1110 bus_transaction_send_from_driver (transaction, connection, message);
1111 dbus_message_unref (message);
1114 if((*new != 0) && (strcmp(new, bus_connection_get_name(connection))))
1116 DBusMessage *message;
1118 _dbus_verbose ("Owner '%s' acquired name '%s'. Sending NameAcquired.\n", new, name);
1120 message = dbus_message_new_signal (DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS, "NameAcquired");
1121 if (message == NULL)
1124 if (!dbus_message_set_destination (message, new) || !dbus_message_append_args (message,
1125 DBUS_TYPE_STRING, &name,
1128 dbus_message_unref (message);
1132 bus_transaction_send_from_driver (transaction, connection, message);
1133 dbus_message_unref (message);
1137 if(bus_transaction_send(transaction, connection, msg))
1138 _dbus_verbose ("NameOwnerChanged sent\n");
1140 _dbus_verbose ("Sending NameOwnerChanged failed\n");