src/libsystemd/sd-bus/test-bus-watch-bind.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <pthread.h>
   4
   5 #include "sd-bus.h"
   6 #include "sd-event.h"
   7 #include "sd-id128.h"
   8
   9 #include "alloc-util.h"
  10 #include "fd-util.h"
  11 #include "fs-util.h"
  12 #include "mkdir.h"
  13 #include "path-util.h"
  14 #include "random-util.h"
  15 #include "rm-rf.h"
  16 #include "socket-util.h"
  17 #include "string-util.h"
  18 #include "tmpfile-util.h"
  19 #include "tests.h"
  20
  21 static int method_foobar(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
  22         log_info("Got Foobar() call.");
  23
  24         assert_se(sd_event_exit(sd_bus_get_event(sd_bus_message_get_bus(m)), 0) >= 0);
  25         return sd_bus_reply_method_return(m, NULL);
  26 }
  27
  28 static int method_exit(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
  29         log_info("Got Exit() call");
  30         assert_se(sd_event_exit(sd_bus_get_event(sd_bus_message_get_bus(m)), 1) >= 0);
  31         return sd_bus_reply_method_return(m, NULL);
  32 }
  33
  34 static const sd_bus_vtable vtable[] = {
  35         SD_BUS_VTABLE_START(0),
  36         SD_BUS_METHOD("Foobar", NULL, NULL, method_foobar, SD_BUS_VTABLE_UNPRIVILEGED),
  37         SD_BUS_METHOD("Exit", NULL, NULL, method_exit, SD_BUS_VTABLE_UNPRIVILEGED),
  38         SD_BUS_VTABLE_END,
  39 };
  40
  41 static void* thread_server(void *p) {
  42         _cleanup_free_ char *suffixed = NULL, *suffixed2 = NULL, *d = NULL;
  43         _cleanup_close_ int fd = -1;
  44         union sockaddr_union u;
  45         const char *path = p;
  46         int r;
  47
  48         log_debug("Initializing server");
  49
  50         /* Let's play some games, by slowly creating the socket directory, and renaming it in the middle */
  51         (void) usleep(100 * USEC_PER_MSEC);
  52
  53         assert_se(mkdir_parents(path, 0755) >= 0);
  54         (void) usleep(100 * USEC_PER_MSEC);
  55
  56         d = dirname_malloc(path);
  57         assert_se(d);
  58         assert_se(asprintf(&suffixed, "%s.%" PRIx64, d, random_u64()) >= 0);
  59         assert_se(rename(d, suffixed) >= 0);
  60         (void) usleep(100 * USEC_PER_MSEC);
  61
  62         assert_se(asprintf(&suffixed2, "%s.%" PRIx64, d, random_u64()) >= 0);
  63         assert_se(symlink(suffixed2, d) >= 0);
  64         (void) usleep(100 * USEC_PER_MSEC);
  65
  66         assert_se(symlink(basename(suffixed), suffixed2) >= 0);
  67         (void) usleep(100 * USEC_PER_MSEC);
  68
  69         socklen_t sa_len;
  70         r = sockaddr_un_set_path(&u.un, path);
  71         assert_se(r >= 0);
  72         sa_len = r;
  73
  74         fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0);
  75         assert_se(fd >= 0);
  76
  77         assert_se(bind(fd, &u.sa, sa_len) >= 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         test_setup_logging(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 }