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de1c301e LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | #pragma once | |
4 | ||
5 | /*** | |
6 | This file is part of systemd. | |
7 | ||
8 | Copyright 2013 Lennart Poettering | |
9 | ||
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. | |
14 | ||
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. | |
19 | ||
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/>. | |
22 | ***/ | |
23 | ||
24 | #include <sys/socket.h> | |
25 | #include <sys/un.h> | |
26 | #include <netinet/in.h> | |
45fbe937 | 27 | #include <pthread.h> |
de1c301e LP |
28 | |
29 | #include "hashmap.h" | |
e3017af9 | 30 | #include "prioq.h" |
de1c301e LP |
31 | #include "list.h" |
32 | #include "util.h" | |
e4ee6e5c | 33 | #include "refcnt.h" |
de1c301e LP |
34 | |
35 | #include "sd-bus.h" | |
36 | #include "bus-error.h" | |
392d5b37 | 37 | #include "bus-match.h" |
bc7fd8cd | 38 | #include "bus-kernel.h" |
de1c301e LP |
39 | |
40 | struct reply_callback { | |
52f3ba91 | 41 | sd_bus_message_handler_t callback; |
de1c301e LP |
42 | void *userdata; |
43 | usec_t timeout; | |
44 | uint64_t serial; | |
e3017af9 | 45 | unsigned prioq_idx; |
de1c301e LP |
46 | }; |
47 | ||
48 | struct filter_callback { | |
52f3ba91 | 49 | sd_bus_message_handler_t callback; |
de1c301e LP |
50 | void *userdata; |
51 | ||
7286037f LP |
52 | unsigned last_iteration; |
53 | ||
de1c301e LP |
54 | LIST_FIELDS(struct filter_callback, callbacks); |
55 | }; | |
56 | ||
29ddb38f LP |
57 | struct node { |
58 | char *path; | |
59 | struct node *parent; | |
60 | LIST_HEAD(struct node, child); | |
61 | LIST_FIELDS(struct node, siblings); | |
62 | ||
63 | LIST_HEAD(struct node_callback, callbacks); | |
64 | LIST_HEAD(struct node_vtable, vtables); | |
65 | LIST_HEAD(struct node_enumerator, enumerators); | |
66 | ||
67 | bool object_manager; | |
68 | }; | |
69 | ||
70 | struct node_callback { | |
71 | struct node *node; | |
72 | ||
73 | bool is_fallback; | |
52f3ba91 | 74 | sd_bus_message_handler_t callback; |
a652755d LP |
75 | void *userdata; |
76 | ||
29ddb38f LP |
77 | unsigned last_iteration; |
78 | ||
79 | LIST_FIELDS(struct node_callback, callbacks); | |
80 | }; | |
81 | ||
82 | struct node_enumerator { | |
83 | struct node *node; | |
84 | ||
85 | sd_bus_node_enumerator_t callback; | |
86 | void *userdata; | |
87 | ||
88 | unsigned last_iteration; | |
89 | ||
90 | LIST_FIELDS(struct node_enumerator, enumerators); | |
91 | }; | |
92 | ||
93 | struct node_vtable { | |
94 | struct node *node; | |
95 | ||
96 | char *interface; | |
a652755d | 97 | bool is_fallback; |
29ddb38f LP |
98 | const sd_bus_vtable *vtable; |
99 | void *userdata; | |
100 | sd_bus_object_find_t find; | |
7286037f LP |
101 | |
102 | unsigned last_iteration; | |
29ddb38f LP |
103 | |
104 | LIST_FIELDS(struct node_vtable, vtables); | |
105 | }; | |
106 | ||
107 | struct vtable_member { | |
108 | const char *path; | |
109 | const char *interface; | |
110 | const char *member; | |
111 | struct node_vtable *parent; | |
112 | unsigned last_iteration; | |
113 | const sd_bus_vtable *vtable; | |
a652755d LP |
114 | }; |
115 | ||
de1c301e | 116 | enum bus_state { |
021a1e78 | 117 | BUS_UNSET, |
de1c301e LP |
118 | BUS_OPENING, |
119 | BUS_AUTHENTICATING, | |
120 | BUS_HELLO, | |
f54514f3 | 121 | BUS_RUNNING, |
718db961 | 122 | BUS_CLOSING, |
f54514f3 | 123 | BUS_CLOSED |
de1c301e LP |
124 | }; |
125 | ||
f54514f3 | 126 | static inline bool BUS_IS_OPEN(enum bus_state state) { |
718db961 | 127 | return state > BUS_UNSET && state < BUS_CLOSING; |
f54514f3 LP |
128 | } |
129 | ||
2181a7f5 LP |
130 | enum bus_auth { |
131 | _BUS_AUTH_INVALID, | |
132 | BUS_AUTH_EXTERNAL, | |
133 | BUS_AUTH_ANONYMOUS | |
134 | }; | |
135 | ||
de1c301e | 136 | struct sd_bus { |
e4ee6e5c LP |
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 | |
144 | same time. */ | |
145 | RefCount n_ref; | |
146 | ||
de1c301e | 147 | enum bus_state state; |
e82c9509 | 148 | int input_fd, output_fd; |
de1c301e | 149 | int message_version; |
021a1e78 | 150 | |
6629161f | 151 | bool is_kernel:1; |
de1c301e | 152 | bool can_fds:1; |
94bbf1ba | 153 | bool bus_client:1; |
2571ead1 | 154 | bool ucred_valid:1; |
2181a7f5 LP |
155 | bool is_server:1; |
156 | bool anonymous_auth:1; | |
15d5af81 LP |
157 | bool prefer_readv:1; |
158 | bool prefer_writev:1; | |
7286037f LP |
159 | bool match_callbacks_modified:1; |
160 | bool filter_callbacks_modified:1; | |
29ddb38f | 161 | bool nodes_modified:1; |
de1c301e | 162 | |
8f155917 LP |
163 | int use_memfd; |
164 | ||
de1c301e LP |
165 | void *rbuffer; |
166 | size_t rbuffer_size; | |
167 | ||
168 | sd_bus_message **rqueue; | |
169 | unsigned rqueue_size; | |
170 | ||
171 | sd_bus_message **wqueue; | |
172 | unsigned wqueue_size; | |
173 | size_t windex; | |
174 | ||
175 | uint64_t serial; | |
176 | ||
177 | char *unique_name; | |
178 | ||
392d5b37 | 179 | struct bus_match_node match_callbacks; |
e3017af9 | 180 | Prioq *reply_callbacks_prioq; |
de1c301e LP |
181 | Hashmap *reply_callbacks; |
182 | LIST_HEAD(struct filter_callback, filter_callbacks); | |
29ddb38f LP |
183 | |
184 | Hashmap *nodes; | |
29ddb38f LP |
185 | Hashmap *vtable_methods; |
186 | Hashmap *vtable_properties; | |
de1c301e LP |
187 | |
188 | union { | |
189 | struct sockaddr sa; | |
190 | struct sockaddr_un un; | |
191 | struct sockaddr_in in; | |
192 | struct sockaddr_in6 in6; | |
193 | } sockaddr; | |
194 | socklen_t sockaddr_size; | |
195 | ||
6629161f | 196 | char *kernel; |
a7893c6b | 197 | char *machine; |
6629161f | 198 | |
98178d39 | 199 | sd_id128_t server_id; |
de1c301e LP |
200 | |
201 | char *address; | |
202 | unsigned address_index; | |
203 | ||
204 | int last_connect_error; | |
205 | ||
2181a7f5 LP |
206 | enum bus_auth auth; |
207 | size_t auth_rbegin; | |
de1c301e LP |
208 | struct iovec auth_iovec[3]; |
209 | unsigned auth_index; | |
2181a7f5 | 210 | char *auth_buffer; |
e3017af9 | 211 | usec_t auth_timeout; |
2571ead1 LP |
212 | |
213 | struct ucred ucred; | |
214 | char label[NAME_MAX]; | |
2c93b4ef | 215 | |
5b12334d LP |
216 | uint64_t creds_mask; |
217 | ||
2c93b4ef LP |
218 | int *fds; |
219 | unsigned n_fds; | |
2fd9ae2e LP |
220 | |
221 | char *exec_path; | |
222 | char **exec_argv; | |
9d373862 LP |
223 | |
224 | uint64_t hello_serial; | |
7286037f | 225 | unsigned iteration_counter; |
fd8d62d9 LP |
226 | |
227 | void *kdbus_buffer; | |
bc7fd8cd | 228 | |
45fbe937 LP |
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 | |
234 | * a mutex. */ | |
235 | pthread_mutex_t memfd_cache_mutex; | |
bc7fd8cd LP |
236 | struct memfd_cache memfd_cache[MEMFD_CACHE_MAX]; |
237 | unsigned n_memfd_cache; | |
d5a2b9a6 LP |
238 | |
239 | pid_t original_pid; | |
264ad849 LP |
240 | |
241 | uint64_t hello_flags; | |
d21a7bb1 | 242 | uint64_t attach_flags; |
c7819669 LP |
243 | |
244 | uint64_t match_cookie; | |
89ffcd2a | 245 | |
40ca29a1 LP |
246 | sd_event_source *input_io_event_source; |
247 | sd_event_source *output_io_event_source; | |
248 | sd_event_source *time_event_source; | |
abc5fe72 | 249 | sd_event_source *quit_event_source; |
40ca29a1 | 250 | sd_event *event; |
affff0b6 LP |
251 | |
252 | sd_bus_message *current; | |
76b54375 LP |
253 | |
254 | sd_bus **default_bus_ptr; | |
255 | pid_t tid; | |
40ca29a1 | 256 | }; |
e3017af9 LP |
257 | |
258 | #define BUS_DEFAULT_TIMEOUT ((usec_t) (25 * USEC_PER_SEC)) | |
25220239 | 259 | |
7a4a2105 LP |
260 | #define BUS_WQUEUE_MAX 1024 |
261 | #define BUS_RQUEUE_MAX 64*1024 | |
25220239 LP |
262 | |
263 | #define BUS_MESSAGE_SIZE_MAX (64*1024*1024) | |
264 | #define BUS_AUTH_SIZE_MAX (64*1024) | |
ac89bf1d | 265 | |
ed205a6b LP |
266 | #define BUS_CONTAINER_DEPTH 128 |
267 | ||
ac89bf1d LP |
268 | /* Defined by the specification as maximum size of an array in |
269 | * bytes */ | |
270 | #define BUS_ARRAY_MAX_SIZE 67108864 | |
271 | ||
2c93b4ef LP |
272 | #define BUS_FDS_MAX 1024 |
273 | ||
2fd9ae2e LP |
274 | #define BUS_EXEC_ARGV_MAX 256 |
275 | ||
6693860f LP |
276 | bool interface_name_is_valid(const char *p); |
277 | bool service_name_is_valid(const char *p); | |
278 | bool member_name_is_valid(const char *p); | |
29ddb38f LP |
279 | bool object_path_is_valid(const char *p); |
280 | char *object_path_startswith(const char *a, const char *b); | |
6693860f | 281 | |
392d5b37 LP |
282 | bool namespace_complex_pattern(const char *pattern, const char *value); |
283 | bool path_complex_pattern(const char *pattern, const char *value); | |
284 | ||
285 | bool namespace_simple_pattern(const char *pattern, const char *value); | |
286 | bool path_simple_pattern(const char *pattern, const char *value); | |
287 | ||
288 | int bus_message_type_from_string(const char *s, uint8_t *u); | |
a56f19c4 | 289 | const char *bus_message_type_to_string(uint8_t u); |
392d5b37 | 290 | |
6693860f | 291 | #define error_name_is_valid interface_name_is_valid |
20902f3e LP |
292 | |
293 | int bus_ensure_running(sd_bus *bus); | |
a7e3212d LP |
294 | int bus_start_running(sd_bus *bus); |
295 | int bus_next_address(sd_bus *bus); | |
d5a2b9a6 LP |
296 | |
297 | bool bus_pid_changed(sd_bus *bus); | |
92e189e5 | 298 | |
0f8bd8de LP |
299 | char *bus_address_escape(const char *v); |
300 | ||
92e189e5 LP |
301 | #define OBJECT_PATH_FOREACH_PREFIX(prefix, path) \ |
302 | for (char *_slash = ({ strcpy((prefix), (path)); streq((prefix), "/") ? NULL : strrchr((prefix), '/'); }) ; \ | |
303 | _slash && !(_slash[(_slash) == (prefix)] = 0); \ | |
304 | _slash = streq((prefix), "/") ? NULL : strrchr((prefix), '/')) | |
8ce2afd6 LP |
305 | |
306 | /* If we are invoking callbacks of a bus object, ensure unreffing the | |
307 | * bus from the callback doesn't destroy the object we are working | |
308 | * on */ | |
309 | #define BUS_DONT_DESTROY(bus) \ | |
d7726e57 | 310 | _cleanup_bus_unref_ _unused_ sd_bus *_dont_destroy_##bus = sd_bus_ref(bus) |