4 This file is part of systemd.
6 Copyright 2013 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
23 #include <sys/socket.h>
27 #include "bus-error.h"
28 #include "bus-kernel.h"
29 #include "bus-match.h"
35 #include "socket-util.h"
38 struct reply_callback {
39 sd_bus_message_handler_t callback;
45 struct filter_callback {
46 sd_bus_message_handler_t callback;
48 unsigned last_iteration;
50 LIST_FIELDS(struct filter_callback, callbacks);
53 struct match_callback {
54 sd_bus_message_handler_t callback;
57 unsigned last_iteration;
61 struct bus_match_node *match_node;
67 LIST_HEAD(struct node, child);
68 LIST_FIELDS(struct node, siblings);
70 LIST_HEAD(struct node_callback, callbacks);
71 LIST_HEAD(struct node_vtable, vtables);
72 LIST_HEAD(struct node_enumerator, enumerators);
73 LIST_HEAD(struct node_object_manager, object_managers);
76 struct node_callback {
80 sd_bus_message_handler_t callback;
82 unsigned last_iteration;
84 LIST_FIELDS(struct node_callback, callbacks);
87 struct node_enumerator {
90 sd_bus_node_enumerator_t callback;
92 unsigned last_iteration;
94 LIST_FIELDS(struct node_enumerator, enumerators);
97 struct node_object_manager {
100 LIST_FIELDS(struct node_object_manager, object_managers);
108 const sd_bus_vtable *vtable;
109 sd_bus_object_find_t find;
111 unsigned last_iteration;
113 LIST_FIELDS(struct node_vtable, vtables);
116 struct vtable_member {
118 const char *interface;
120 struct node_vtable *parent;
121 unsigned last_iteration;
122 const sd_bus_vtable *vtable;
125 typedef enum BusSlotType {
132 BUS_NODE_OBJECT_MANAGER,
133 _BUS_SLOT_INVALID = -1,
145 LIST_FIELDS(sd_bus_slot, slots);
148 struct reply_callback reply_callback;
149 struct filter_callback filter_callback;
150 struct match_callback match_callback;
151 struct node_callback node_callback;
152 struct node_enumerator node_enumerator;
153 struct node_object_manager node_object_manager;
154 struct node_vtable node_vtable;
168 static inline bool BUS_IS_OPEN(enum bus_state state) {
169 return state > BUS_UNSET && state < BUS_CLOSING;
179 /* We use atomic ref counting here since sd_bus_message
180 objects retain references to their originating sd_bus but
181 we want to allow them to be processed in a different
182 thread. We won't provide full thread safety, but only the
183 bare minimum that makes it possible to use sd_bus and
184 sd_bus_message objects independently and on different
185 threads as long as each object is used only once at the
189 enum bus_state state;
190 int input_fd, output_fd;
199 bool anonymous_auth:1;
201 bool prefer_writev:1;
202 bool match_callbacks_modified:1;
203 bool filter_callbacks_modified:1;
204 bool nodes_modified:1;
206 bool fake_creds_valid:1;
207 bool fake_pids_valid:1;
208 bool manual_peer_interface:1;
211 bool allow_interactive_authorization:1;
212 bool exit_on_disconnect:1;
214 bool exit_triggered:1;
222 sd_bus_message **rqueue;
223 unsigned rqueue_size;
224 size_t rqueue_allocated;
226 sd_bus_message **wqueue;
227 unsigned wqueue_size;
229 size_t wqueue_allocated;
236 struct bus_match_node match_callbacks;
237 Prioq *reply_callbacks_prioq;
238 OrderedHashmap *reply_callbacks;
239 LIST_HEAD(struct filter_callback, filter_callbacks);
242 Hashmap *vtable_methods;
243 Hashmap *vtable_properties;
245 union sockaddr_union sockaddr;
246 socklen_t sockaddr_size;
252 sd_id128_t server_id;
255 unsigned address_index;
257 int last_connect_error;
261 struct iovec auth_iovec[3];
277 unsigned iteration_counter;
281 /* We do locking around the memfd cache, since we want to
282 * allow people to process a sd_bus_message in a different
283 * thread then it was generated on and free it there. Since
284 * adding something to the memfd cache might happen when a
285 * message is released, we hence need to protect this bit with
287 pthread_mutex_t memfd_cache_mutex;
288 struct memfd_cache memfd_cache[MEMFD_CACHE_MAX];
289 unsigned n_memfd_cache;
293 uint64_t hello_flags;
294 uint64_t attach_flags;
296 uint64_t match_cookie;
298 sd_event_source *input_io_event_source;
299 sd_event_source *output_io_event_source;
300 sd_event_source *time_event_source;
301 sd_event_source *quit_event_source;
305 sd_bus_message *current_message;
306 sd_bus_slot *current_slot;
307 sd_bus_message_handler_t current_handler;
308 void *current_userdata;
310 sd_bus **default_bus_ptr;
313 struct kdbus_creds fake_creds;
314 struct kdbus_pids fake_pids;
322 unsigned bloom_n_hash;
324 sd_bus_track *track_queue;
326 LIST_HEAD(sd_bus_slot, slots);
327 LIST_HEAD(sd_bus_track, tracks);
330 #define BUS_DEFAULT_TIMEOUT ((usec_t) (25 * USEC_PER_SEC))
332 #define BUS_WQUEUE_MAX (192*1024)
333 #define BUS_RQUEUE_MAX (192*1024)
335 #define BUS_MESSAGE_SIZE_MAX (64*1024*1024)
336 #define BUS_AUTH_SIZE_MAX (64*1024)
338 #define BUS_CONTAINER_DEPTH 128
340 /* Defined by the specification as maximum size of an array in
342 #define BUS_ARRAY_MAX_SIZE 67108864
344 #define BUS_FDS_MAX 1024
346 #define BUS_EXEC_ARGV_MAX 256
348 bool interface_name_is_valid(const char *p) _pure_;
349 bool service_name_is_valid(const char *p) _pure_;
350 #if 0 /// UNNEEDED by elogind
351 char* service_name_startswith(const char *a, const char *b);
353 bool member_name_is_valid(const char *p) _pure_;
354 bool object_path_is_valid(const char *p) _pure_;
355 char *object_path_startswith(const char *a, const char *b) _pure_;
357 bool namespace_complex_pattern(const char *pattern, const char *value) _pure_;
358 bool path_complex_pattern(const char *pattern, const char *value) _pure_;
360 bool namespace_simple_pattern(const char *pattern, const char *value) _pure_;
361 bool path_simple_pattern(const char *pattern, const char *value) _pure_;
363 int bus_message_type_from_string(const char *s, uint8_t *u) _pure_;
364 const char *bus_message_type_to_string(uint8_t u) _pure_;
366 #define error_name_is_valid interface_name_is_valid
368 int bus_ensure_running(sd_bus *bus);
369 int bus_start_running(sd_bus *bus);
370 int bus_next_address(sd_bus *bus);
372 int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m);
374 int bus_rqueue_make_room(sd_bus *bus);
376 bool bus_pid_changed(sd_bus *bus);
378 char *bus_address_escape(const char *v);
380 #define OBJECT_PATH_FOREACH_PREFIX(prefix, path) \
381 for (char *_slash = ({ strcpy((prefix), (path)); streq((prefix), "/") ? NULL : strrchr((prefix), '/'); }) ; \
382 _slash && !(_slash[(_slash) == (prefix)] = 0); \
383 _slash = streq((prefix), "/") ? NULL : strrchr((prefix), '/'))
385 /* If we are invoking callbacks of a bus object, ensure unreffing the
386 * bus from the callback doesn't destroy the object we are working
388 #define BUS_DONT_DESTROY(bus) \
389 _cleanup_(sd_bus_unrefp) _unused_ sd_bus *_dont_destroy_##bus = sd_bus_ref(bus)
391 int bus_set_address_system(sd_bus *bus);
392 #if 0 /// UNNEEDED by elogind
393 int bus_set_address_user(sd_bus *bus);
395 int bus_set_address_system_remote(sd_bus *b, const char *host);
396 int bus_set_address_system_machine(sd_bus *b, const char *machine);
398 #if 0 /// UNNEEDED by elogind
399 int bus_remove_match_by_string(sd_bus *bus, const char *match, sd_bus_message_handler_t callback, void *userdata);
402 int bus_get_root_path(sd_bus *bus);
404 int bus_maybe_reply_error(sd_bus_message *m, int r, sd_bus_error *error);
406 #define bus_assert_return(expr, r, error) \
408 if (!assert_log(expr, #expr)) \
409 return sd_bus_error_set_errno(error, r); \