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 {
129 _BUS_SLOT_DISCONNECTED,
136 BUS_NODE_OBJECT_MANAGER,
146 LIST_FIELDS(sd_bus_slot, slots);
149 struct reply_callback reply_callback;
150 struct filter_callback filter_callback;
151 struct match_callback match_callback;
152 struct node_callback node_callback;
153 struct node_enumerator node_enumerator;
154 struct node_object_manager node_object_manager;
155 struct node_vtable node_vtable;
169 static inline bool BUS_IS_OPEN(enum bus_state state) {
170 return state > BUS_UNSET && state < BUS_CLOSING;
180 /* We use atomic ref counting here since sd_bus_message
181 objects retain references to their originating sd_bus but
182 we want to allow them to be processed in a different
183 thread. We won't provide full thread safety, but only the
184 bare minimum that makes it possible to use sd_bus and
185 sd_bus_message objects independently and on different
186 threads as long as each object is used only once at the
190 enum bus_state state;
191 int input_fd, output_fd;
200 bool anonymous_auth:1;
202 bool prefer_writev:1;
203 bool match_callbacks_modified:1;
204 bool filter_callbacks_modified:1;
205 bool nodes_modified:1;
207 bool fake_creds_valid:1;
208 bool manual_peer_interface:1;
217 sd_bus_message **rqueue;
218 unsigned rqueue_size;
219 size_t rqueue_allocated;
221 sd_bus_message **wqueue;
222 unsigned wqueue_size;
224 size_t wqueue_allocated;
231 struct bus_match_node match_callbacks;
232 Prioq *reply_callbacks_prioq;
233 Hashmap *reply_callbacks;
234 LIST_HEAD(struct filter_callback, filter_callbacks);
237 Hashmap *vtable_methods;
238 Hashmap *vtable_properties;
242 struct sockaddr_un un;
243 struct sockaddr_in in;
244 struct sockaddr_in6 in6;
246 socklen_t sockaddr_size;
251 sd_id128_t server_id;
254 unsigned address_index;
256 int last_connect_error;
260 struct iovec auth_iovec[3];
266 char label[NAME_MAX];
276 unsigned iteration_counter;
280 /* We do locking around the memfd cache, since we want to
281 * allow people to process a sd_bus_message in a different
282 * thread then it was generated on and free it there. Since
283 * adding something to the memfd cache might happen when a
284 * message is released, we hence need to protect this bit with
286 pthread_mutex_t memfd_cache_mutex;
287 struct memfd_cache memfd_cache[MEMFD_CACHE_MAX];
288 unsigned n_memfd_cache;
292 uint64_t hello_flags;
293 uint64_t attach_flags;
295 uint64_t match_cookie;
297 sd_event_source *input_io_event_source;
298 sd_event_source *output_io_event_source;
299 sd_event_source *time_event_source;
300 sd_event_source *quit_event_source;
304 sd_bus_message *current_message;
305 sd_bus_slot *current_slot;
307 sd_bus **default_bus_ptr;
310 struct kdbus_creds fake_creds;
315 char *connection_name;
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 bool member_name_is_valid(const char *p) _pure_;
346 bool object_path_is_valid(const char *p) _pure_;
347 char *object_path_startswith(const char *a, const char *b) _pure_;
349 bool namespace_complex_pattern(const char *pattern, const char *value) _pure_;
350 bool path_complex_pattern(const char *pattern, const char *value) _pure_;
352 bool namespace_simple_pattern(const char *pattern, const char *value) _pure_;
353 bool path_simple_pattern(const char *pattern, const char *value) _pure_;
355 int bus_message_type_from_string(const char *s, uint8_t *u) _pure_;
356 const char *bus_message_type_to_string(uint8_t u) _pure_;
358 #define error_name_is_valid interface_name_is_valid
360 int bus_ensure_running(sd_bus *bus);
361 int bus_start_running(sd_bus *bus);
362 int bus_next_address(sd_bus *bus);
364 int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m);
366 int bus_rqueue_make_room(sd_bus *bus);
368 bool bus_pid_changed(sd_bus *bus);
370 char *bus_address_escape(const char *v);
372 #define OBJECT_PATH_FOREACH_PREFIX(prefix, path) \
373 for (char *_slash = ({ strcpy((prefix), (path)); streq((prefix), "/") ? NULL : strrchr((prefix), '/'); }) ; \
374 _slash && !(_slash[(_slash) == (prefix)] = 0); \
375 _slash = streq((prefix), "/") ? NULL : strrchr((prefix), '/'))
377 /* If we are invoking callbacks of a bus object, ensure unreffing the
378 * bus from the callback doesn't destroy the object we are working
380 #define BUS_DONT_DESTROY(bus) \
381 _cleanup_bus_unref_ _unused_ sd_bus *_dont_destroy_##bus = sd_bus_ref(bus)
383 int bus_set_address_system(sd_bus *bus);
384 int bus_set_address_user(sd_bus *bus);
385 int bus_set_address_system_remote(sd_bus *b, const char *host);
386 int bus_set_address_system_container(sd_bus *b, const char *machine);
388 int bus_remove_match_by_string(sd_bus *bus, const char *match, sd_bus_message_handler_t callback, void *userdata);