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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 | ||
a652755d | 57 | struct object_callback { |
52f3ba91 | 58 | sd_bus_message_handler_t callback; |
a652755d LP |
59 | void *userdata; |
60 | ||
61 | char *path; | |
62 | bool is_fallback; | |
7286037f LP |
63 | |
64 | unsigned last_iteration; | |
a652755d LP |
65 | }; |
66 | ||
de1c301e | 67 | enum bus_state { |
021a1e78 | 68 | BUS_UNSET, |
de1c301e LP |
69 | BUS_OPENING, |
70 | BUS_AUTHENTICATING, | |
71 | BUS_HELLO, | |
f54514f3 LP |
72 | BUS_RUNNING, |
73 | BUS_CLOSED | |
de1c301e LP |
74 | }; |
75 | ||
f54514f3 LP |
76 | static inline bool BUS_IS_OPEN(enum bus_state state) { |
77 | return state > BUS_UNSET && state < BUS_CLOSED; | |
78 | } | |
79 | ||
2181a7f5 LP |
80 | enum bus_auth { |
81 | _BUS_AUTH_INVALID, | |
82 | BUS_AUTH_EXTERNAL, | |
83 | BUS_AUTH_ANONYMOUS | |
84 | }; | |
85 | ||
de1c301e | 86 | struct sd_bus { |
e4ee6e5c LP |
87 | /* We use atomic ref counting here since sd_bus_message |
88 | objects retain references to their originating sd_bus but | |
89 | we want to allow them to be processed in a different | |
90 | thread. We won't provide full thread safety, but only the | |
91 | bare minimum that makes it possible to use sd_bus and | |
92 | sd_bus_message objects independently and on different | |
93 | threads as long as each object is used only once at the | |
94 | same time. */ | |
95 | RefCount n_ref; | |
96 | ||
de1c301e | 97 | enum bus_state state; |
e82c9509 | 98 | int input_fd, output_fd; |
de1c301e | 99 | int message_version; |
021a1e78 | 100 | |
6629161f | 101 | bool is_kernel:1; |
de1c301e | 102 | bool can_fds:1; |
94bbf1ba | 103 | bool bus_client:1; |
2571ead1 | 104 | bool ucred_valid:1; |
2181a7f5 LP |
105 | bool is_server:1; |
106 | bool anonymous_auth:1; | |
15d5af81 LP |
107 | bool prefer_readv:1; |
108 | bool prefer_writev:1; | |
6807947e | 109 | bool processing:1; |
7286037f LP |
110 | bool match_callbacks_modified:1; |
111 | bool filter_callbacks_modified:1; | |
112 | bool object_callbacks_modified:1; | |
de1c301e | 113 | |
8f155917 LP |
114 | int use_memfd; |
115 | ||
de1c301e LP |
116 | void *rbuffer; |
117 | size_t rbuffer_size; | |
118 | ||
119 | sd_bus_message **rqueue; | |
120 | unsigned rqueue_size; | |
121 | ||
122 | sd_bus_message **wqueue; | |
123 | unsigned wqueue_size; | |
124 | size_t windex; | |
125 | ||
126 | uint64_t serial; | |
127 | ||
128 | char *unique_name; | |
129 | ||
392d5b37 | 130 | struct bus_match_node match_callbacks; |
e3017af9 | 131 | Prioq *reply_callbacks_prioq; |
de1c301e LP |
132 | Hashmap *reply_callbacks; |
133 | LIST_HEAD(struct filter_callback, filter_callbacks); | |
a652755d | 134 | Hashmap *object_callbacks; |
de1c301e LP |
135 | |
136 | union { | |
137 | struct sockaddr sa; | |
138 | struct sockaddr_un un; | |
139 | struct sockaddr_in in; | |
140 | struct sockaddr_in6 in6; | |
141 | } sockaddr; | |
142 | socklen_t sockaddr_size; | |
143 | ||
6629161f LP |
144 | char *kernel; |
145 | ||
98178d39 | 146 | sd_id128_t server_id; |
de1c301e LP |
147 | |
148 | char *address; | |
149 | unsigned address_index; | |
150 | ||
151 | int last_connect_error; | |
152 | ||
2181a7f5 LP |
153 | enum bus_auth auth; |
154 | size_t auth_rbegin; | |
de1c301e LP |
155 | struct iovec auth_iovec[3]; |
156 | unsigned auth_index; | |
2181a7f5 | 157 | char *auth_buffer; |
e3017af9 | 158 | usec_t auth_timeout; |
2571ead1 LP |
159 | |
160 | struct ucred ucred; | |
161 | char label[NAME_MAX]; | |
2c93b4ef LP |
162 | |
163 | int *fds; | |
164 | unsigned n_fds; | |
2fd9ae2e LP |
165 | |
166 | char *exec_path; | |
167 | char **exec_argv; | |
9d373862 LP |
168 | |
169 | uint64_t hello_serial; | |
7286037f | 170 | unsigned iteration_counter; |
fd8d62d9 LP |
171 | |
172 | void *kdbus_buffer; | |
bc7fd8cd | 173 | |
45fbe937 LP |
174 | /* We do locking around the memfd cache, since we want to |
175 | * allow people to process a sd_bus_message in a different | |
176 | * thread then it was generated on and free it there. Since | |
177 | * adding something to the memfd cache might happen when a | |
178 | * message is released, we hence need to protect this bit with | |
179 | * a mutex. */ | |
180 | pthread_mutex_t memfd_cache_mutex; | |
bc7fd8cd LP |
181 | struct memfd_cache memfd_cache[MEMFD_CACHE_MAX]; |
182 | unsigned n_memfd_cache; | |
d5a2b9a6 LP |
183 | |
184 | pid_t original_pid; | |
264ad849 LP |
185 | |
186 | uint64_t hello_flags; | |
c7819669 LP |
187 | |
188 | uint64_t match_cookie; | |
de1c301e | 189 | }; |
89ffcd2a LP |
190 | |
191 | static inline void bus_unrefp(sd_bus **b) { | |
192 | sd_bus_unref(*b); | |
193 | } | |
194 | ||
195 | #define _cleanup_bus_unref_ __attribute__((cleanup(bus_unrefp))) | |
b9bf7e2b | 196 | #define _cleanup_bus_error_free_ __attribute__((cleanup(sd_bus_error_free))) |
e3017af9 LP |
197 | |
198 | #define BUS_DEFAULT_TIMEOUT ((usec_t) (25 * USEC_PER_SEC)) | |
25220239 LP |
199 | |
200 | #define BUS_WQUEUE_MAX 128 | |
201 | #define BUS_RQUEUE_MAX 128 | |
202 | ||
203 | #define BUS_MESSAGE_SIZE_MAX (64*1024*1024) | |
204 | #define BUS_AUTH_SIZE_MAX (64*1024) | |
ac89bf1d | 205 | |
ed205a6b LP |
206 | #define BUS_CONTAINER_DEPTH 128 |
207 | ||
ac89bf1d LP |
208 | /* Defined by the specification as maximum size of an array in |
209 | * bytes */ | |
210 | #define BUS_ARRAY_MAX_SIZE 67108864 | |
211 | ||
2c93b4ef LP |
212 | #define BUS_FDS_MAX 1024 |
213 | ||
2fd9ae2e LP |
214 | #define BUS_EXEC_ARGV_MAX 256 |
215 | ||
ac89bf1d | 216 | bool object_path_is_valid(const char *p); |
6693860f LP |
217 | bool interface_name_is_valid(const char *p); |
218 | bool service_name_is_valid(const char *p); | |
219 | bool member_name_is_valid(const char *p); | |
220 | ||
392d5b37 LP |
221 | bool namespace_complex_pattern(const char *pattern, const char *value); |
222 | bool path_complex_pattern(const char *pattern, const char *value); | |
223 | ||
224 | bool namespace_simple_pattern(const char *pattern, const char *value); | |
225 | bool path_simple_pattern(const char *pattern, const char *value); | |
226 | ||
227 | int bus_message_type_from_string(const char *s, uint8_t *u); | |
a56f19c4 | 228 | const char *bus_message_type_to_string(uint8_t u); |
392d5b37 | 229 | |
6693860f | 230 | #define error_name_is_valid interface_name_is_valid |
20902f3e LP |
231 | |
232 | int bus_ensure_running(sd_bus *bus); | |
a7e3212d LP |
233 | int bus_start_running(sd_bus *bus); |
234 | int bus_next_address(sd_bus *bus); | |
d5a2b9a6 LP |
235 | |
236 | bool bus_pid_changed(sd_bus *bus); |