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;
49 struct filter_callback {
50 sd_bus_message_handler_t callback;
53 unsigned last_iteration;
55 LIST_FIELDS(struct filter_callback, callbacks);
61 LIST_HEAD(struct node, child);
62 LIST_FIELDS(struct node, siblings);
64 LIST_HEAD(struct node_callback, callbacks);
65 LIST_HEAD(struct node_vtable, vtables);
66 LIST_HEAD(struct node_enumerator, enumerators);
71 struct node_callback {
75 sd_bus_message_handler_t callback;
78 unsigned last_iteration;
80 LIST_FIELDS(struct node_callback, callbacks);
83 struct node_enumerator {
86 sd_bus_node_enumerator_t callback;
89 unsigned last_iteration;
91 LIST_FIELDS(struct node_enumerator, enumerators);
99 const sd_bus_vtable *vtable;
101 sd_bus_object_find_t find;
103 unsigned last_iteration;
105 LIST_FIELDS(struct node_vtable, vtables);
108 struct vtable_member {
110 const char *interface;
112 struct node_vtable *parent;
113 unsigned last_iteration;
114 const sd_bus_vtable *vtable;
127 static inline bool BUS_IS_OPEN(enum bus_state state) {
128 return state > BUS_UNSET && state < BUS_CLOSING;
138 /* We use atomic ref counting here since sd_bus_message
139 objects retain references to their originating sd_bus but
140 we want to allow them to be processed in a different
141 thread. We won't provide full thread safety, but only the
142 bare minimum that makes it possible to use sd_bus and
143 sd_bus_message objects independently and on different
144 threads as long as each object is used only once at the
148 enum bus_state state;
149 int input_fd, output_fd;
158 bool anonymous_auth:1;
160 bool prefer_writev:1;
161 bool match_callbacks_modified:1;
162 bool filter_callbacks_modified:1;
163 bool nodes_modified:1;
165 bool fake_creds_valid:1;
172 sd_bus_message **rqueue;
173 unsigned rqueue_size;
174 size_t rqueue_allocated;
176 sd_bus_message **wqueue;
177 unsigned wqueue_size;
179 size_t wqueue_allocated;
186 struct bus_match_node match_callbacks;
187 Prioq *reply_callbacks_prioq;
188 Hashmap *reply_callbacks;
189 LIST_HEAD(struct filter_callback, filter_callbacks);
192 Hashmap *vtable_methods;
193 Hashmap *vtable_properties;
197 struct sockaddr_un un;
198 struct sockaddr_in in;
199 struct sockaddr_in6 in6;
201 socklen_t sockaddr_size;
206 sd_id128_t server_id;
209 unsigned address_index;
211 int last_connect_error;
215 struct iovec auth_iovec[3];
221 char label[NAME_MAX];
231 uint64_t hello_serial;
232 unsigned iteration_counter;
236 /* We do locking around the memfd cache, since we want to
237 * allow people to process a sd_bus_message in a different
238 * thread then it was generated on and free it there. Since
239 * adding something to the memfd cache might happen when a
240 * message is released, we hence need to protect this bit with
242 pthread_mutex_t memfd_cache_mutex;
243 struct memfd_cache memfd_cache[MEMFD_CACHE_MAX];
244 unsigned n_memfd_cache;
248 uint64_t hello_flags;
249 uint64_t attach_flags;
251 uint64_t match_cookie;
253 sd_event_source *input_io_event_source;
254 sd_event_source *output_io_event_source;
255 sd_event_source *time_event_source;
256 sd_event_source *quit_event_source;
260 sd_bus_message *current;
262 sd_bus **default_bus_ptr;
265 struct kdbus_creds fake_creds;
271 #define BUS_DEFAULT_TIMEOUT ((usec_t) (25 * USEC_PER_SEC))
273 #define BUS_WQUEUE_MAX 1024
274 #define BUS_RQUEUE_MAX 64*1024
276 #define BUS_MESSAGE_SIZE_MAX (64*1024*1024)
277 #define BUS_AUTH_SIZE_MAX (64*1024)
279 #define BUS_CONTAINER_DEPTH 128
281 /* Defined by the specification as maximum size of an array in
283 #define BUS_ARRAY_MAX_SIZE 67108864
285 #define BUS_FDS_MAX 1024
287 #define BUS_EXEC_ARGV_MAX 256
289 bool interface_name_is_valid(const char *p);
290 bool service_name_is_valid(const char *p);
291 bool member_name_is_valid(const char *p);
292 bool object_path_is_valid(const char *p);
293 char *object_path_startswith(const char *a, const char *b);
295 bool namespace_complex_pattern(const char *pattern, const char *value);
296 bool path_complex_pattern(const char *pattern, const char *value);
298 bool namespace_simple_pattern(const char *pattern, const char *value);
299 bool path_simple_pattern(const char *pattern, const char *value);
301 int bus_message_type_from_string(const char *s, uint8_t *u);
302 const char *bus_message_type_to_string(uint8_t u);
304 #define error_name_is_valid interface_name_is_valid
306 int bus_ensure_running(sd_bus *bus);
307 int bus_start_running(sd_bus *bus);
308 int bus_next_address(sd_bus *bus);
310 int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m);
312 int bus_rqueue_make_room(sd_bus *bus);
314 bool bus_pid_changed(sd_bus *bus);
316 char *bus_address_escape(const char *v);
318 #define OBJECT_PATH_FOREACH_PREFIX(prefix, path) \
319 for (char *_slash = ({ strcpy((prefix), (path)); streq((prefix), "/") ? NULL : strrchr((prefix), '/'); }) ; \
320 _slash && !(_slash[(_slash) == (prefix)] = 0); \
321 _slash = streq((prefix), "/") ? NULL : strrchr((prefix), '/'))
323 /* If we are invoking callbacks of a bus object, ensure unreffing the
324 * bus from the callback doesn't destroy the object we are working
326 #define BUS_DONT_DESTROY(bus) \
327 _cleanup_bus_unref_ _unused_ sd_bus *_dont_destroy_##bus = sd_bus_ref(bus)