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"
40 struct reply_callback {
41 sd_bus_message_handler_t callback;
48 struct filter_callback {
49 sd_bus_message_handler_t callback;
52 unsigned last_iteration;
54 LIST_FIELDS(struct filter_callback, callbacks);
60 LIST_HEAD(struct node, child);
61 LIST_FIELDS(struct node, siblings);
63 LIST_HEAD(struct node_callback, callbacks);
64 LIST_HEAD(struct node_vtable, vtables);
65 LIST_HEAD(struct node_enumerator, enumerators);
70 struct node_callback {
74 sd_bus_message_handler_t callback;
77 unsigned last_iteration;
79 LIST_FIELDS(struct node_callback, callbacks);
82 struct node_enumerator {
85 sd_bus_node_enumerator_t callback;
88 unsigned last_iteration;
90 LIST_FIELDS(struct node_enumerator, enumerators);
98 const sd_bus_vtable *vtable;
100 sd_bus_object_find_t find;
102 unsigned last_iteration;
104 LIST_FIELDS(struct node_vtable, vtables);
107 struct vtable_member {
109 const char *interface;
111 struct node_vtable *parent;
112 unsigned last_iteration;
113 const sd_bus_vtable *vtable;
126 static inline bool BUS_IS_OPEN(enum bus_state state) {
127 return state > BUS_UNSET && state < BUS_CLOSING;
137 /* We use atomic ref counting here since sd_bus_message
138 objects retain references to their originating sd_bus but
139 we want to allow them to be processed in a different
140 thread. We won't provide full thread safety, but only the
141 bare minimum that makes it possible to use sd_bus and
142 sd_bus_message objects independently and on different
143 threads as long as each object is used only once at the
147 enum bus_state state;
148 int input_fd, output_fd;
157 bool anonymous_auth:1;
159 bool prefer_writev:1;
160 bool match_callbacks_modified:1;
161 bool filter_callbacks_modified:1;
162 bool nodes_modified:1;
170 sd_bus_message **rqueue;
171 unsigned rqueue_size;
172 size_t rqueue_allocated;
174 sd_bus_message **wqueue;
175 unsigned wqueue_size;
177 size_t wqueue_allocated;
184 struct bus_match_node match_callbacks;
185 Prioq *reply_callbacks_prioq;
186 Hashmap *reply_callbacks;
187 LIST_HEAD(struct filter_callback, filter_callbacks);
190 Hashmap *vtable_methods;
191 Hashmap *vtable_properties;
195 struct sockaddr_un un;
196 struct sockaddr_in in;
197 struct sockaddr_in6 in6;
199 socklen_t sockaddr_size;
204 sd_id128_t server_id;
207 unsigned address_index;
209 int last_connect_error;
213 struct iovec auth_iovec[3];
219 char label[NAME_MAX];
229 uint64_t hello_serial;
230 unsigned iteration_counter;
234 /* We do locking around the memfd cache, since we want to
235 * allow people to process a sd_bus_message in a different
236 * thread then it was generated on and free it there. Since
237 * adding something to the memfd cache might happen when a
238 * message is released, we hence need to protect this bit with
240 pthread_mutex_t memfd_cache_mutex;
241 struct memfd_cache memfd_cache[MEMFD_CACHE_MAX];
242 unsigned n_memfd_cache;
246 uint64_t hello_flags;
247 uint64_t attach_flags;
249 uint64_t match_cookie;
251 sd_event_source *input_io_event_source;
252 sd_event_source *output_io_event_source;
253 sd_event_source *time_event_source;
254 sd_event_source *quit_event_source;
258 sd_bus_message *current;
260 sd_bus **default_bus_ptr;
264 #define BUS_DEFAULT_TIMEOUT ((usec_t) (25 * USEC_PER_SEC))
266 #define BUS_WQUEUE_MAX 1024
267 #define BUS_RQUEUE_MAX 64*1024
269 #define BUS_MESSAGE_SIZE_MAX (64*1024*1024)
270 #define BUS_AUTH_SIZE_MAX (64*1024)
272 #define BUS_CONTAINER_DEPTH 128
274 /* Defined by the specification as maximum size of an array in
276 #define BUS_ARRAY_MAX_SIZE 67108864
278 #define BUS_FDS_MAX 1024
280 #define BUS_EXEC_ARGV_MAX 256
282 bool interface_name_is_valid(const char *p);
283 bool service_name_is_valid(const char *p);
284 bool member_name_is_valid(const char *p);
285 bool object_path_is_valid(const char *p);
286 char *object_path_startswith(const char *a, const char *b);
288 bool namespace_complex_pattern(const char *pattern, const char *value);
289 bool path_complex_pattern(const char *pattern, const char *value);
291 bool namespace_simple_pattern(const char *pattern, const char *value);
292 bool path_simple_pattern(const char *pattern, const char *value);
294 int bus_message_type_from_string(const char *s, uint8_t *u);
295 const char *bus_message_type_to_string(uint8_t u);
297 #define error_name_is_valid interface_name_is_valid
299 int bus_ensure_running(sd_bus *bus);
300 int bus_start_running(sd_bus *bus);
301 int bus_next_address(sd_bus *bus);
303 int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m);
305 int bus_rqueue_make_room(sd_bus *bus);
307 bool bus_pid_changed(sd_bus *bus);
309 char *bus_address_escape(const char *v);
311 #define OBJECT_PATH_FOREACH_PREFIX(prefix, path) \
312 for (char *_slash = ({ strcpy((prefix), (path)); streq((prefix), "/") ? NULL : strrchr((prefix), '/'); }) ; \
313 _slash && !(_slash[(_slash) == (prefix)] = 0); \
314 _slash = streq((prefix), "/") ? NULL : strrchr((prefix), '/'))
316 /* If we are invoking callbacks of a bus object, ensure unreffing the
317 * bus from the callback doesn't destroy the object we are working
319 #define BUS_DONT_DESTROY(bus) \
320 _cleanup_bus_unref_ _unused_ sd_bus *_dont_destroy_##bus = sd_bus_ref(bus)