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;
156 bool anonymous_auth:1;
158 bool prefer_writev:1;
159 bool match_callbacks_modified:1;
160 bool filter_callbacks_modified:1;
161 bool nodes_modified:1;
168 sd_bus_message **rqueue;
169 unsigned rqueue_size, rqueue_allocated;
171 sd_bus_message **wqueue;
172 unsigned wqueue_size;
180 struct bus_match_node match_callbacks;
181 Prioq *reply_callbacks_prioq;
182 Hashmap *reply_callbacks;
183 LIST_HEAD(struct filter_callback, filter_callbacks);
186 Hashmap *vtable_methods;
187 Hashmap *vtable_properties;
191 struct sockaddr_un un;
192 struct sockaddr_in in;
193 struct sockaddr_in6 in6;
195 socklen_t sockaddr_size;
200 sd_id128_t server_id;
203 unsigned address_index;
205 int last_connect_error;
209 struct iovec auth_iovec[3];
215 char label[NAME_MAX];
225 uint64_t hello_serial;
226 unsigned iteration_counter;
230 /* We do locking around the memfd cache, since we want to
231 * allow people to process a sd_bus_message in a different
232 * thread then it was generated on and free it there. Since
233 * adding something to the memfd cache might happen when a
234 * message is released, we hence need to protect this bit with
236 pthread_mutex_t memfd_cache_mutex;
237 struct memfd_cache memfd_cache[MEMFD_CACHE_MAX];
238 unsigned n_memfd_cache;
242 uint64_t hello_flags;
243 uint64_t attach_flags;
245 uint64_t match_cookie;
247 sd_event_source *input_io_event_source;
248 sd_event_source *output_io_event_source;
249 sd_event_source *time_event_source;
250 sd_event_source *quit_event_source;
253 sd_bus_message *current;
255 sd_bus **default_bus_ptr;
259 #define BUS_DEFAULT_TIMEOUT ((usec_t) (25 * USEC_PER_SEC))
261 #define BUS_WQUEUE_MAX 1024
262 #define BUS_RQUEUE_MAX 64*1024
264 #define BUS_MESSAGE_SIZE_MAX (64*1024*1024)
265 #define BUS_AUTH_SIZE_MAX (64*1024)
267 #define BUS_CONTAINER_DEPTH 128
269 /* Defined by the specification as maximum size of an array in
271 #define BUS_ARRAY_MAX_SIZE 67108864
273 #define BUS_FDS_MAX 1024
275 #define BUS_EXEC_ARGV_MAX 256
277 bool interface_name_is_valid(const char *p);
278 bool service_name_is_valid(const char *p);
279 bool member_name_is_valid(const char *p);
280 bool object_path_is_valid(const char *p);
281 char *object_path_startswith(const char *a, const char *b);
283 bool namespace_complex_pattern(const char *pattern, const char *value);
284 bool path_complex_pattern(const char *pattern, const char *value);
286 bool namespace_simple_pattern(const char *pattern, const char *value);
287 bool path_simple_pattern(const char *pattern, const char *value);
289 int bus_message_type_from_string(const char *s, uint8_t *u);
290 const char *bus_message_type_to_string(uint8_t u);
292 #define error_name_is_valid interface_name_is_valid
294 int bus_ensure_running(sd_bus *bus);
295 int bus_start_running(sd_bus *bus);
296 int bus_next_address(sd_bus *bus);
298 int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m);
300 int bus_rqueue_make_room(sd_bus *bus);
302 bool bus_pid_changed(sd_bus *bus);
304 char *bus_address_escape(const char *v);
306 #define OBJECT_PATH_FOREACH_PREFIX(prefix, path) \
307 for (char *_slash = ({ strcpy((prefix), (path)); streq((prefix), "/") ? NULL : strrchr((prefix), '/'); }) ; \
308 _slash && !(_slash[(_slash) == (prefix)] = 0); \
309 _slash = streq((prefix), "/") ? NULL : strrchr((prefix), '/'))
311 /* If we are invoking callbacks of a bus object, ensure unreffing the
312 * bus from the callback doesn't destroy the object we are working
314 #define BUS_DONT_DESTROY(bus) \
315 _cleanup_bus_unref_ _unused_ sd_bus *_dont_destroy_##bus = sd_bus_ref(bus)