]>
Commit | Line | Data |
---|---|---|
8a5cd31e LP |
1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
2 | /*** | |
8a5cd31e | 3 | Copyright 2017 Lennart Poettering |
8a5cd31e LP |
4 | ***/ |
5 | ||
6 | #include <pthread.h> | |
7 | ||
8 | #include "sd-bus.h" | |
9 | #include "sd-event.h" | |
10 | #include "sd-id128.h" | |
11 | ||
12 | #include "alloc-util.h" | |
13 | #include "fd-util.h" | |
14 | #include "fileio.h" | |
15 | #include "fs-util.h" | |
16 | #include "mkdir.h" | |
17 | #include "path-util.h" | |
18 | #include "random-util.h" | |
19 | #include "rm-rf.h" | |
20 | #include "socket-util.h" | |
21 | #include "string-util.h" | |
22 | ||
23 | static int method_foobar(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) { | |
24 | log_info("Got Foobar() call."); | |
25 | ||
26 | assert_se(sd_event_exit(sd_bus_get_event(sd_bus_message_get_bus(m)), 0) >= 0); | |
27 | return sd_bus_reply_method_return(m, NULL); | |
28 | } | |
29 | ||
30 | static int method_exit(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) { | |
31 | log_info("Got Exit() call"); | |
32 | assert_se(sd_event_exit(sd_bus_get_event(sd_bus_message_get_bus(m)), 1) >= 0); | |
33 | return sd_bus_reply_method_return(m, NULL); | |
34 | } | |
35 | ||
36 | static const sd_bus_vtable vtable[] = { | |
37 | SD_BUS_VTABLE_START(0), | |
38 | SD_BUS_METHOD("Foobar", NULL, NULL, method_foobar, SD_BUS_VTABLE_UNPRIVILEGED), | |
39 | SD_BUS_METHOD("Exit", NULL, NULL, method_exit, SD_BUS_VTABLE_UNPRIVILEGED), | |
40 | SD_BUS_VTABLE_END, | |
41 | }; | |
42 | ||
43 | static void* thread_server(void *p) { | |
44 | _cleanup_free_ char *suffixed = NULL, *suffixed2 = NULL, *d = NULL; | |
45 | _cleanup_close_ int fd = -1; | |
46 | union sockaddr_union u = { | |
47 | .un.sun_family = AF_UNIX, | |
48 | }; | |
49 | const char *path = p; | |
50 | ||
51 | log_debug("Initializing server"); | |
52 | ||
53 | /* Let's play some games, by slowly creating the socket directory, and renaming it in the middle */ | |
54 | (void) usleep(100 * USEC_PER_MSEC); | |
55 | ||
56 | assert_se(mkdir_parents(path, 0755) >= 0); | |
57 | (void) usleep(100 * USEC_PER_MSEC); | |
58 | ||
59 | d = dirname_malloc(path); | |
60 | assert_se(d); | |
61 | assert_se(asprintf(&suffixed, "%s.%" PRIx64, d, random_u64()) >= 0); | |
62 | assert_se(rename(d, suffixed) >= 0); | |
63 | (void) usleep(100 * USEC_PER_MSEC); | |
64 | ||
65 | assert_se(asprintf(&suffixed2, "%s.%" PRIx64, d, random_u64()) >= 0); | |
66 | assert_se(symlink(suffixed2, d) >= 0); | |
67 | (void) usleep(100 * USEC_PER_MSEC); | |
68 | ||
69 | assert_se(symlink(basename(suffixed), suffixed2) >= 0); | |
70 | (void) usleep(100 * USEC_PER_MSEC); | |
71 | ||
72 | strncpy(u.un.sun_path, path, sizeof(u.un.sun_path)); | |
73 | ||
74 | fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0); | |
75 | assert_se(fd >= 0); | |
76 | ||
77 | assert_se(bind(fd, &u.sa, SOCKADDR_UN_LEN(u.un)) >= 0); | |
78 | usleep(100 * USEC_PER_MSEC); | |
79 | ||
80 | assert_se(listen(fd, SOMAXCONN) >= 0); | |
81 | usleep(100 * USEC_PER_MSEC); | |
82 | ||
83 | assert_se(touch(path) >= 0); | |
84 | usleep(100 * USEC_PER_MSEC); | |
85 | ||
86 | log_debug("Initialized server"); | |
87 | ||
88 | for (;;) { | |
89 | _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; | |
90 | _cleanup_(sd_event_unrefp) sd_event *event = NULL; | |
91 | sd_id128_t id; | |
92 | int bus_fd, code; | |
93 | ||
94 | assert_se(sd_id128_randomize(&id) >= 0); | |
95 | ||
96 | assert_se(sd_event_new(&event) >= 0); | |
97 | ||
98 | bus_fd = accept4(fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC); | |
99 | assert_se(bus_fd >= 0); | |
100 | ||
101 | log_debug("Accepted server connection"); | |
102 | ||
103 | assert_se(sd_bus_new(&bus) >= 0); | |
104 | assert_se(sd_bus_set_description(bus, "server") >= 0); | |
105 | assert_se(sd_bus_set_fd(bus, bus_fd, bus_fd) >= 0); | |
106 | assert_se(sd_bus_set_server(bus, true, id) >= 0); | |
107 | /* assert_se(sd_bus_set_anonymous(bus, true) >= 0); */ | |
108 | ||
109 | assert_se(sd_bus_attach_event(bus, event, 0) >= 0); | |
110 | ||
111 | assert_se(sd_bus_add_object_vtable(bus, NULL, "/foo", "foo.TestInterface", vtable, NULL) >= 0); | |
112 | ||
113 | assert_se(sd_bus_start(bus) >= 0); | |
114 | ||
115 | assert_se(sd_event_loop(event) >= 0); | |
116 | ||
117 | assert_se(sd_event_get_exit_code(event, &code) >= 0); | |
118 | ||
119 | if (code > 0) | |
120 | break; | |
121 | } | |
122 | ||
123 | log_debug("Server done"); | |
124 | ||
125 | return NULL; | |
126 | } | |
127 | ||
128 | static void* thread_client1(void *p) { | |
129 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; | |
130 | _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; | |
131 | const char *path = p, *t; | |
132 | int r; | |
133 | ||
134 | log_debug("Initializing client1"); | |
135 | ||
136 | assert_se(sd_bus_new(&bus) >= 0); | |
137 | assert_se(sd_bus_set_description(bus, "client1") >= 0); | |
138 | ||
139 | t = strjoina("unix:path=", path); | |
140 | assert_se(sd_bus_set_address(bus, t) >= 0); | |
141 | assert_se(sd_bus_set_watch_bind(bus, true) >= 0); | |
142 | assert_se(sd_bus_start(bus) >= 0); | |
143 | ||
144 | r = sd_bus_call_method(bus, "foo.bar", "/foo", "foo.TestInterface", "Foobar", &error, NULL, NULL); | |
145 | assert_se(r >= 0); | |
146 | ||
147 | log_debug("Client1 done"); | |
148 | ||
149 | return NULL; | |
150 | } | |
151 | ||
152 | static int client2_callback(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) { | |
153 | assert_se(sd_bus_message_is_method_error(m, NULL) == 0); | |
154 | assert_se(sd_event_exit(sd_bus_get_event(sd_bus_message_get_bus(m)), 0) >= 0); | |
155 | return 0; | |
156 | } | |
157 | ||
158 | static void* thread_client2(void *p) { | |
159 | _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; | |
160 | _cleanup_(sd_event_unrefp) sd_event *event = NULL; | |
161 | const char *path = p, *t; | |
162 | ||
163 | log_debug("Initializing client2"); | |
164 | ||
165 | assert_se(sd_event_new(&event) >= 0); | |
166 | assert_se(sd_bus_new(&bus) >= 0); | |
167 | assert_se(sd_bus_set_description(bus, "client2") >= 0); | |
168 | ||
169 | t = strjoina("unix:path=", path); | |
170 | assert_se(sd_bus_set_address(bus, t) >= 0); | |
171 | assert_se(sd_bus_set_watch_bind(bus, true) >= 0); | |
172 | assert_se(sd_bus_attach_event(bus, event, 0) >= 0); | |
173 | assert_se(sd_bus_start(bus) >= 0); | |
174 | ||
175 | assert_se(sd_bus_call_method_async(bus, NULL, "foo.bar", "/foo", "foo.TestInterface", "Foobar", client2_callback, NULL, NULL) >= 0); | |
176 | ||
177 | assert_se(sd_event_loop(event) >= 0); | |
178 | ||
179 | log_debug("Client2 done"); | |
180 | ||
181 | return NULL; | |
182 | } | |
183 | ||
184 | static void request_exit(const char *path) { | |
185 | _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; | |
186 | const char *t; | |
187 | ||
188 | assert_se(sd_bus_new(&bus) >= 0); | |
189 | ||
190 | t = strjoina("unix:path=", path); | |
191 | assert_se(sd_bus_set_address(bus, t) >= 0); | |
192 | assert_se(sd_bus_set_watch_bind(bus, true) >= 0); | |
193 | assert_se(sd_bus_set_description(bus, "request-exit") >= 0); | |
194 | assert_se(sd_bus_start(bus) >= 0); | |
195 | ||
196 | assert_se(sd_bus_call_method(bus, "foo.bar", "/foo", "foo.TestInterface", "Exit", NULL, NULL, NULL) >= 0); | |
197 | } | |
198 | ||
199 | int main(int argc, char *argv[]) { | |
200 | _cleanup_(rm_rf_physical_and_freep) char *d = NULL; | |
201 | pthread_t server, client1, client2; | |
202 | char *path; | |
203 | ||
204 | log_set_max_level(LOG_DEBUG); | |
205 | ||
206 | /* We use /dev/shm here rather than /tmp, since some weird distros might set up /tmp as some weird fs that | |
207 | * doesn't support inotify properly. */ | |
208 | assert_se(mkdtemp_malloc("/dev/shm/systemd-watch-bind-XXXXXX", &d) >= 0); | |
209 | ||
210 | path = strjoina(d, "/this/is/a/socket"); | |
211 | ||
212 | assert_se(pthread_create(&server, NULL, thread_server, path) == 0); | |
213 | assert_se(pthread_create(&client1, NULL, thread_client1, path) == 0); | |
214 | assert_se(pthread_create(&client2, NULL, thread_client2, path) == 0); | |
215 | ||
216 | assert_se(pthread_join(client1, NULL) == 0); | |
217 | assert_se(pthread_join(client2, NULL) == 0); | |
218 | ||
219 | request_exit(path); | |
220 | ||
221 | assert_se(pthread_join(server, NULL) == 0); | |
222 | ||
223 | return 0; | |
224 | } |