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;
171 sd_bus_message **wqueue;
172 unsigned wqueue_size;
179 struct bus_match_node match_callbacks;
180 Prioq *reply_callbacks_prioq;
181 Hashmap *reply_callbacks;
182 LIST_HEAD(struct filter_callback, filter_callbacks);
187 Hashmap *vtable_methods;
188 Hashmap *vtable_properties;
192 struct sockaddr_un un;
193 struct sockaddr_in in;
194 struct sockaddr_in6 in6;
196 socklen_t sockaddr_size;
201 sd_id128_t server_id;
204 unsigned address_index;
206 int last_connect_error;
210 struct iovec auth_iovec[3];
216 char label[NAME_MAX];
224 uint64_t hello_serial;
225 unsigned iteration_counter;
229 /* We do locking around the memfd cache, since we want to
230 * allow people to process a sd_bus_message in a different
231 * thread then it was generated on and free it there. Since
232 * adding something to the memfd cache might happen when a
233 * message is released, we hence need to protect this bit with
235 pthread_mutex_t memfd_cache_mutex;
236 struct memfd_cache memfd_cache[MEMFD_CACHE_MAX];
237 unsigned n_memfd_cache;
241 uint64_t hello_flags;
243 uint64_t match_cookie;
245 sd_event_source *input_io_event_source;
246 sd_event_source *output_io_event_source;
247 sd_event_source *time_event_source;
248 sd_event_source *quit_event_source;
251 sd_bus_message *current;
253 sd_bus **default_bus_ptr;
257 #define BUS_DEFAULT_TIMEOUT ((usec_t) (25 * USEC_PER_SEC))
259 #define BUS_WQUEUE_MAX 1024
260 #define BUS_RQUEUE_MAX 64*1024
262 #define BUS_MESSAGE_SIZE_MAX (64*1024*1024)
263 #define BUS_AUTH_SIZE_MAX (64*1024)
265 #define BUS_CONTAINER_DEPTH 128
267 /* Defined by the specification as maximum size of an array in
269 #define BUS_ARRAY_MAX_SIZE 67108864
271 #define BUS_FDS_MAX 1024
273 #define BUS_EXEC_ARGV_MAX 256
275 bool interface_name_is_valid(const char *p);
276 bool service_name_is_valid(const char *p);
277 bool member_name_is_valid(const char *p);
278 bool object_path_is_valid(const char *p);
279 char *object_path_startswith(const char *a, const char *b);
281 bool namespace_complex_pattern(const char *pattern, const char *value);
282 bool path_complex_pattern(const char *pattern, const char *value);
284 bool namespace_simple_pattern(const char *pattern, const char *value);
285 bool path_simple_pattern(const char *pattern, const char *value);
287 int bus_message_type_from_string(const char *s, uint8_t *u);
288 const char *bus_message_type_to_string(uint8_t u);
290 #define error_name_is_valid interface_name_is_valid
292 int bus_ensure_running(sd_bus *bus);
293 int bus_start_running(sd_bus *bus);
294 int bus_next_address(sd_bus *bus);
296 bool bus_pid_changed(sd_bus *bus);
298 char *bus_address_escape(const char *v);
300 #define OBJECT_PATH_FOREACH_PREFIX(prefix, path) \
301 for (char *_slash = ({ strcpy((prefix), (path)); streq((prefix), "/") ? NULL : strrchr((prefix), '/'); }) ; \
302 _slash && !(_slash[(_slash) == (prefix)] = 0); \
303 _slash = streq((prefix), "/") ? NULL : strrchr((prefix), '/'))
305 /* If we are invoking callbacks of a bus object, ensure unreffing the
306 * bus from the callback doesn't destroy the object we are working
308 #define BUS_DONT_DESTROY(bus) \
309 _cleanup_bus_unref_ _unused_ sd_bus *_dont_destroy_##bus = sd_bus_ref(bus)