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, rqueue_allocated;
173 sd_bus_message **wqueue;
174 unsigned wqueue_size;
182 struct bus_match_node match_callbacks;
183 Prioq *reply_callbacks_prioq;
184 Hashmap *reply_callbacks;
185 LIST_HEAD(struct filter_callback, filter_callbacks);
188 Hashmap *vtable_methods;
189 Hashmap *vtable_properties;
193 struct sockaddr_un un;
194 struct sockaddr_in in;
195 struct sockaddr_in6 in6;
197 socklen_t sockaddr_size;
202 sd_id128_t server_id;
205 unsigned address_index;
207 int last_connect_error;
211 struct iovec auth_iovec[3];
217 char label[NAME_MAX];
227 uint64_t hello_serial;
228 unsigned iteration_counter;
232 /* We do locking around the memfd cache, since we want to
233 * allow people to process a sd_bus_message in a different
234 * thread then it was generated on and free it there. Since
235 * adding something to the memfd cache might happen when a
236 * message is released, we hence need to protect this bit with
238 pthread_mutex_t memfd_cache_mutex;
239 struct memfd_cache memfd_cache[MEMFD_CACHE_MAX];
240 unsigned n_memfd_cache;
244 uint64_t hello_flags;
245 uint64_t attach_flags;
247 uint64_t match_cookie;
249 sd_event_source *input_io_event_source;
250 sd_event_source *output_io_event_source;
251 sd_event_source *time_event_source;
252 sd_event_source *quit_event_source;
256 sd_bus_message *current;
258 sd_bus **default_bus_ptr;
262 #define BUS_DEFAULT_TIMEOUT ((usec_t) (25 * USEC_PER_SEC))
264 #define BUS_WQUEUE_MAX 1024
265 #define BUS_RQUEUE_MAX 64*1024
267 #define BUS_MESSAGE_SIZE_MAX (64*1024*1024)
268 #define BUS_AUTH_SIZE_MAX (64*1024)
270 #define BUS_CONTAINER_DEPTH 128
272 /* Defined by the specification as maximum size of an array in
274 #define BUS_ARRAY_MAX_SIZE 67108864
276 #define BUS_FDS_MAX 1024
278 #define BUS_EXEC_ARGV_MAX 256
280 bool interface_name_is_valid(const char *p);
281 bool service_name_is_valid(const char *p);
282 bool member_name_is_valid(const char *p);
283 bool object_path_is_valid(const char *p);
284 char *object_path_startswith(const char *a, const char *b);
286 bool namespace_complex_pattern(const char *pattern, const char *value);
287 bool path_complex_pattern(const char *pattern, const char *value);
289 bool namespace_simple_pattern(const char *pattern, const char *value);
290 bool path_simple_pattern(const char *pattern, const char *value);
292 int bus_message_type_from_string(const char *s, uint8_t *u);
293 const char *bus_message_type_to_string(uint8_t u);
295 #define error_name_is_valid interface_name_is_valid
297 int bus_ensure_running(sd_bus *bus);
298 int bus_start_running(sd_bus *bus);
299 int bus_next_address(sd_bus *bus);
301 int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m);
303 int bus_rqueue_make_room(sd_bus *bus);
305 bool bus_pid_changed(sd_bus *bus);
307 char *bus_address_escape(const char *v);
309 #define OBJECT_PATH_FOREACH_PREFIX(prefix, path) \
310 for (char *_slash = ({ strcpy((prefix), (path)); streq((prefix), "/") ? NULL : strrchr((prefix), '/'); }) ; \
311 _slash && !(_slash[(_slash) == (prefix)] = 0); \
312 _slash = streq((prefix), "/") ? NULL : strrchr((prefix), '/'))
314 /* If we are invoking callbacks of a bus object, ensure unreffing the
315 * bus from the callback doesn't destroy the object we are working
317 #define BUS_DONT_DESTROY(bus) \
318 _cleanup_bus_unref_ _unused_ sd_bus *_dont_destroy_##bus = sd_bus_ref(bus)