1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
6 This file is part of systemd.
8 Copyright 2013 Lennart Poettering
10 systemd is free software; you can redistribute it and/or modify it
11 under the terms of the GNU Lesser General Public License as published by
12 the Free Software Foundation; either version 2.1 of the License, or
13 (at your option) any later version.
15 systemd is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public License
21 along with systemd; If not, see <http://www.gnu.org/licenses/>.
24 #include <sys/socket.h>
26 #include <netinet/in.h>
36 #include "bus-error.h"
37 #include "bus-match.h"
38 #include "bus-kernel.h"
41 struct reply_callback
{
42 sd_bus_message_handler_t callback
;
48 struct filter_callback
{
49 sd_bus_message_handler_t callback
;
51 unsigned last_iteration
;
53 LIST_FIELDS(struct filter_callback
, callbacks
);
56 struct match_callback
{
57 sd_bus_message_handler_t callback
;
60 unsigned last_iteration
;
64 struct bus_match_node
*match_node
;
70 LIST_HEAD(struct node
, child
);
71 LIST_FIELDS(struct node
, siblings
);
73 LIST_HEAD(struct node_callback
, callbacks
);
74 LIST_HEAD(struct node_vtable
, vtables
);
75 LIST_HEAD(struct node_enumerator
, enumerators
);
76 LIST_HEAD(struct node_object_manager
, object_managers
);
79 struct node_callback
{
83 sd_bus_message_handler_t callback
;
85 unsigned last_iteration
;
87 LIST_FIELDS(struct node_callback
, callbacks
);
90 struct node_enumerator
{
93 sd_bus_node_enumerator_t callback
;
95 unsigned last_iteration
;
97 LIST_FIELDS(struct node_enumerator
, enumerators
);
100 struct node_object_manager
{
103 LIST_FIELDS(struct node_object_manager
, object_managers
);
111 const sd_bus_vtable
*vtable
;
112 sd_bus_object_find_t find
;
114 unsigned last_iteration
;
116 LIST_FIELDS(struct node_vtable
, vtables
);
119 struct vtable_member
{
121 const char *interface
;
123 struct node_vtable
*parent
;
124 unsigned last_iteration
;
125 const sd_bus_vtable
*vtable
;
128 typedef enum BusSlotType
{
135 BUS_NODE_OBJECT_MANAGER
,
136 _BUS_SLOT_INVALID
= -1,
147 LIST_FIELDS(sd_bus_slot
, slots
);
150 struct reply_callback reply_callback
;
151 struct filter_callback filter_callback
;
152 struct match_callback match_callback
;
153 struct node_callback node_callback
;
154 struct node_enumerator node_enumerator
;
155 struct node_object_manager node_object_manager
;
156 struct node_vtable node_vtable
;
170 static inline bool BUS_IS_OPEN(enum bus_state state
) {
171 return state
> BUS_UNSET
&& state
< BUS_CLOSING
;
181 /* We use atomic ref counting here since sd_bus_message
182 objects retain references to their originating sd_bus but
183 we want to allow them to be processed in a different
184 thread. We won't provide full thread safety, but only the
185 bare minimum that makes it possible to use sd_bus and
186 sd_bus_message objects independently and on different
187 threads as long as each object is used only once at the
191 enum bus_state state
;
192 int input_fd
, output_fd
;
201 bool anonymous_auth
:1;
203 bool prefer_writev
:1;
204 bool match_callbacks_modified
:1;
205 bool filter_callbacks_modified
:1;
206 bool nodes_modified
:1;
208 bool fake_creds_valid
:1;
209 bool fake_pids_valid
:1;
210 bool manual_peer_interface
:1;
219 sd_bus_message
**rqueue
;
220 unsigned rqueue_size
;
221 size_t rqueue_allocated
;
223 sd_bus_message
**wqueue
;
224 unsigned wqueue_size
;
226 size_t wqueue_allocated
;
233 struct bus_match_node match_callbacks
;
234 Prioq
*reply_callbacks_prioq
;
235 OrderedHashmap
*reply_callbacks
;
236 LIST_HEAD(struct filter_callback
, filter_callbacks
);
239 Hashmap
*vtable_methods
;
240 Hashmap
*vtable_properties
;
242 union sockaddr_union sockaddr
;
243 socklen_t sockaddr_size
;
248 sd_id128_t server_id
;
251 unsigned address_index
;
253 int last_connect_error
;
257 struct iovec auth_iovec
[3];
263 char label
[NAME_MAX
];
273 unsigned iteration_counter
;
277 /* We do locking around the memfd cache, since we want to
278 * allow people to process a sd_bus_message in a different
279 * thread then it was generated on and free it there. Since
280 * adding something to the memfd cache might happen when a
281 * message is released, we hence need to protect this bit with
283 pthread_mutex_t memfd_cache_mutex
;
284 struct memfd_cache memfd_cache
[MEMFD_CACHE_MAX
];
285 unsigned n_memfd_cache
;
289 uint64_t hello_flags
;
290 uint64_t attach_flags
;
292 uint64_t match_cookie
;
294 sd_event_source
*input_io_event_source
;
295 sd_event_source
*output_io_event_source
;
296 sd_event_source
*time_event_source
;
297 sd_event_source
*quit_event_source
;
301 sd_bus_message
*current_message
;
302 sd_bus_slot
*current_slot
;
303 sd_bus_message_handler_t current_handler
;
304 void *current_userdata
;
306 sd_bus
**default_bus_ptr
;
309 struct kdbus_creds fake_creds
;
310 struct kdbus_pids fake_pids
;
318 unsigned bloom_n_hash
;
320 sd_bus_track
*track_queue
;
322 LIST_HEAD(sd_bus_slot
, slots
);
325 #define BUS_DEFAULT_TIMEOUT ((usec_t) (25 * USEC_PER_SEC))
327 #define BUS_WQUEUE_MAX 1024
328 #define BUS_RQUEUE_MAX 64*1024
330 #define BUS_MESSAGE_SIZE_MAX (64*1024*1024)
331 #define BUS_AUTH_SIZE_MAX (64*1024)
333 #define BUS_CONTAINER_DEPTH 128
335 /* Defined by the specification as maximum size of an array in
337 #define BUS_ARRAY_MAX_SIZE 67108864
339 #define BUS_FDS_MAX 1024
341 #define BUS_EXEC_ARGV_MAX 256
343 bool interface_name_is_valid(const char *p
) _pure_
;
344 bool service_name_is_valid(const char *p
) _pure_
;
345 char* service_name_startswith(const char *a
, const char *b
);
346 bool member_name_is_valid(const char *p
) _pure_
;
347 bool object_path_is_valid(const char *p
) _pure_
;
348 char *object_path_startswith(const char *a
, const char *b
) _pure_
;
350 bool namespace_complex_pattern(const char *pattern
, const char *value
) _pure_
;
351 bool path_complex_pattern(const char *pattern
, const char *value
) _pure_
;
353 bool namespace_simple_pattern(const char *pattern
, const char *value
) _pure_
;
354 bool path_simple_pattern(const char *pattern
, const char *value
) _pure_
;
356 int bus_message_type_from_string(const char *s
, uint8_t *u
) _pure_
;
357 const char *bus_message_type_to_string(uint8_t u
) _pure_
;
359 #define error_name_is_valid interface_name_is_valid
361 int bus_ensure_running(sd_bus
*bus
);
362 int bus_start_running(sd_bus
*bus
);
363 int bus_next_address(sd_bus
*bus
);
365 int bus_seal_synthetic_message(sd_bus
*b
, sd_bus_message
*m
);
367 int bus_rqueue_make_room(sd_bus
*bus
);
369 bool bus_pid_changed(sd_bus
*bus
);
371 char *bus_address_escape(const char *v
);
373 #define OBJECT_PATH_FOREACH_PREFIX(prefix, path) \
374 for (char *_slash = ({ strcpy((prefix), (path)); streq((prefix), "/") ? NULL : strrchr((prefix), '/'); }) ; \
375 _slash && !(_slash[(_slash) == (prefix)] = 0); \
376 _slash = streq((prefix), "/") ? NULL : strrchr((prefix), '/'))
378 /* If we are invoking callbacks of a bus object, ensure unreffing the
379 * bus from the callback doesn't destroy the object we are working
381 #define BUS_DONT_DESTROY(bus) \
382 _cleanup_bus_unref_ _unused_ sd_bus *_dont_destroy_##bus = sd_bus_ref(bus)
384 int bus_set_address_system(sd_bus
*bus
);
385 int bus_set_address_user(sd_bus
*bus
);
386 int bus_set_address_system_remote(sd_bus
*b
, const char *host
);
387 int bus_set_address_system_container(sd_bus
*b
, const char *machine
);
389 int bus_remove_match_by_string(sd_bus
*bus
, const char *match
, sd_bus_message_handler_t callback
, void *userdata
);
391 int bus_get_root_path(sd_bus
*bus
);