src/libsystemd/sd-bus/test-bus-chat.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <fcntl.h>
   4 #include <pthread.h>
   5 #include <stdlib.h>
   6 #include <unistd.h>
   7
   8 #include "sd-bus.h"
   9
  10 #include "alloc-util.h"
  11 #include "bus-error.h"
  12 #include "bus-internal.h"
  13 #include "bus-match.h"
  14 #include "errno-util.h"
  15 #include "fd-util.h"
  16 #include "format-util.h"
  17 #include "log.h"
  18 #include "macro.h"
  19 #include "string-util.h"
  20 #include "tests.h"
  21
  22 static int match_callback(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
  23         log_info("Match triggered! destination=%s interface=%s member=%s",
  24                  strna(sd_bus_message_get_destination(m)),
  25                  strna(sd_bus_message_get_interface(m)),
  26                  strna(sd_bus_message_get_member(m)));
  27         return 0;
  28 }
  29
  30 static int object_callback(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
  31         int r;
  32
  33         if (sd_bus_message_is_method_error(m, NULL))
  34                 return 0;
  35
  36         if (sd_bus_message_is_method_call(m, "org.object.test", "Foobar")) {
  37                 log_info("Invoked Foobar() on %s", sd_bus_message_get_path(m));
  38
  39                 r = sd_bus_reply_method_return(m, NULL);
  40                 if (r < 0)
  41                         return log_error_errno(r, "Failed to send reply: %m");
  42
  43                 return 1;
  44         }
  45
  46         return 0;
  47 }
  48
  49 static int server_init(sd_bus **_bus) {
  50         sd_bus *bus = NULL;
  51         sd_id128_t id;
  52         int r;
  53         const char *unique, *desc;
  54
  55         assert_se(_bus);
  56
  57         r = sd_bus_open_user_with_description(&bus, "my bus!");
  58         if (r < 0) {
  59                 log_error_errno(r, "Failed to connect to user bus: %m");
  60                 goto fail;
  61         }
  62
  63         r = sd_bus_get_bus_id(bus, &id);
  64         if (r < 0) {
  65                 log_error_errno(r, "Failed to get server ID: %m");
  66                 goto fail;
  67         }
  68
  69         r = sd_bus_get_unique_name(bus, &unique);
  70         if (r < 0) {
  71                 log_error_errno(r, "Failed to get unique name: %m");
  72                 goto fail;
  73         }
  74
  75         assert_se(sd_bus_get_description(bus, &desc) >= 0);
  76         assert_se(streq(desc, "my bus!"));
  77
  78         log_info("Peer ID is " SD_ID128_FORMAT_STR ".", SD_ID128_FORMAT_VAL(id));
  79         log_info("Unique ID: %s", unique);
  80         log_info("Can send file handles: %i", sd_bus_can_send(bus, 'h'));
  81
  82         r = sd_bus_request_name(bus, "org.freedesktop.systemd.test", 0);
  83         if (r < 0) {
  84                 log_error_errno(r, "Failed to acquire name: %m");
  85                 goto fail;
  86         }
  87
  88         r = sd_bus_add_fallback(bus, NULL, "/foo/bar", object_callback, NULL);
  89         if (r < 0) {
  90                 log_error_errno(r, "Failed to add object: %m");
  91                 goto fail;
  92         }
  93
  94         r = sd_bus_match_signal(bus, NULL, NULL, NULL, "foo.bar", "Notify", match_callback, NULL);
  95         if (r < 0) {
  96                 log_error_errno(r, "Failed to request match: %m");
  97                 goto fail;
  98         }
  99
 100         r = sd_bus_match_signal(bus, NULL, NULL, NULL, "foo.bar", "NotifyTo", match_callback, NULL);
 101         if (r < 0) {
 102                 log_error_errno(r, "Failed to request match: %m");
 103                 goto fail;
 104         }
 105
 106         r = sd_bus_add_match(bus, NULL, "type='signal',interface='org.freedesktop.DBus',member='NameOwnerChanged'", match_callback, NULL);
 107         if (r < 0) {
 108                 log_error_errno(r, "Failed to add match: %m");
 109                 goto fail;
 110         }
 111
 112         bus_match_dump(stdout, &bus->match_callbacks, 0);
 113
 114         *_bus = bus;
 115         return 0;
 116
 117 fail:
 118         sd_bus_unref(bus);
 119         return r;
 120 }
 121
 122 static int server(sd_bus *bus) {
 123         int r;
 124         bool client1_gone = false, client2_gone = false;
 125
 126         while (!client1_gone || !client2_gone) {
 127                 _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
 128                 pid_t pid = 0;
 129                 const char *label = NULL;
 130
 131                 r = sd_bus_process(bus, &m);
 132                 if (r < 0) {
 133                         log_error_errno(r, "Failed to process requests: %m");
 134                         goto fail;
 135                 }
 136
 137                 if (r == 0) {
 138                         r = sd_bus_wait(bus, UINT64_MAX);
 139                         if (r < 0) {
 140                                 log_error_errno(r, "Failed to wait: %m");
 141                                 goto fail;
 142                         }
 143
 144                         continue;
 145                 }
 146
 147                 if (!m)
 148                         continue;
 149
 150                 sd_bus_creds_get_pid(sd_bus_message_get_creds(m), &pid);
 151                 sd_bus_creds_get_selinux_context(sd_bus_message_get_creds(m), &label);
 152                 log_info("Got message! member=%s pid="PID_FMT" label=%s",
 153                          strna(sd_bus_message_get_member(m)),
 154                          pid,
 155                          strna(label));
 156                 /* sd_bus_message_dump(m); */
 157                 /* sd_bus_message_rewind(m, true); */
 158
 159                 if (sd_bus_message_is_method_call(m, "org.freedesktop.systemd.test", "LowerCase")) {
 160                         const char *hello;
 161                         _cleanup_free_ char *lowercase = NULL;
 162
 163                         r = sd_bus_message_read(m, "s", &hello);
 164                         if (r < 0) {
 165                                 log_error_errno(r, "Failed to get parameter: %m");
 166                                 goto fail;
 167                         }
 168
 169                         lowercase = strdup(hello);
 170                         if (!lowercase) {
 171                                 r = log_oom();
 172                                 goto fail;
 173                         }
 174
 175                         ascii_strlower(lowercase);
 176
 177                         r = sd_bus_reply_method_return(m, "s", lowercase);
 178                         if (r < 0) {
 179                                 log_error_errno(r, "Failed to send reply: %m");
 180                                 goto fail;
 181                         }
 182                 } else if (sd_bus_message_is_method_call(m, "org.freedesktop.systemd.test", "ExitClient1")) {
 183
 184                         r = sd_bus_reply_method_return(m, NULL);
 185                         if (r < 0) {
 186                                 log_error_errno(r, "Failed to send reply: %m");
 187                                 goto fail;
 188                         }
 189
 190                         client1_gone = true;
 191                 } else if (sd_bus_message_is_method_call(m, "org.freedesktop.systemd.test", "ExitClient2")) {
 192
 193                         r = sd_bus_reply_method_return(m, NULL);
 194                         if (r < 0) {
 195                                 log_error_errno(r, "Failed to send reply: %m");
 196                                 goto fail;
 197                         }
 198
 199                         client2_gone = true;
 200                 } else if (sd_bus_message_is_method_call(m, "org.freedesktop.systemd.test", "Slow")) {
 201
 202                         sleep(1);
 203
 204                         r = sd_bus_reply_method_return(m, NULL);
 205                         if (r < 0) {
 206                                 log_error_errno(r, "Failed to send reply: %m");
 207                                 goto fail;
 208                         }
 209
 210                 } else if (sd_bus_message_is_method_call(m, "org.freedesktop.systemd.test", "FileDescriptor")) {
 211                         int fd;
 212                         static const char x = 'X';
 213
 214                         r = sd_bus_message_read(m, "h", &fd);
 215                         if (r < 0) {
 216                                 log_error_errno(r, "Failed to get parameter: %m");
 217                                 goto fail;
 218                         }
 219
 220                         log_info("Received fd=%d", fd);
 221
 222                         if (write(fd, &x, 1) < 0) {
 223                                 log_error_errno(errno, "Failed to write to fd: %m");
 224                                 safe_close(fd);
 225                                 goto fail;
 226                         }
 227
 228                         r = sd_bus_reply_method_return(m, NULL);
 229                         if (r < 0) {
 230                                 log_error_errno(r, "Failed to send reply: %m");
 231                                 goto fail;
 232                         }
 233
 234                 } else if (sd_bus_message_is_method_call(m, NULL, NULL)) {
 235
 236                         r = sd_bus_reply_method_error(
 237                                         m,
 238                                         &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_UNKNOWN_METHOD, "Unknown method."));
 239                         if (r < 0) {
 240                                 log_error_errno(r, "Failed to send reply: %m");
 241                                 goto fail;
 242                         }
 243                 }
 244         }
 245
 246         r = 0;
 247
 248 fail:
 249         if (bus) {
 250                 sd_bus_flush(bus);
 251                 sd_bus_unref(bus);
 252         }
 253
 254         return r;
 255 }
 256
 257 static void* client1(void *p) {
 258         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 259         _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
 260         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
 261         const char *hello;
 262         int r;
 263         _cleanup_close_pair_ int pp[2] = { -EBADF, -EBADF };
 264         char x;
 265
 266         r = sd_bus_open_user(&bus);
 267         if (r < 0) {
 268                 log_error_errno(r, "Failed to connect to user bus: %m");
 269                 goto finish;
 270         }
 271
 272         r = sd_bus_call_method(
 273                         bus,
 274                         "org.freedesktop.systemd.test",
 275                         "/",
 276                         "org.freedesktop.systemd.test",
 277                         "LowerCase",
 278                         &error,
 279                         &reply,
 280                         "s",
 281                         "HELLO");
 282         if (r < 0) {
 283                 log_error_errno(r, "Failed to issue method call: %m");
 284                 goto finish;
 285         }
 286
 287         r = sd_bus_message_read(reply, "s", &hello);
 288         if (r < 0) {
 289                 log_error_errno(r, "Failed to get string: %m");
 290                 goto finish;
 291         }
 292
 293         assert_se(streq(hello, "hello"));
 294
 295         if (pipe2(pp, O_CLOEXEC|O_NONBLOCK) < 0) {
 296                 r = log_error_errno(errno, "Failed to allocate pipe: %m");
 297                 goto finish;
 298         }
 299
 300         log_info("Sending fd=%d", pp[1]);
 301
 302         r = sd_bus_call_method(
 303                         bus,
 304                         "org.freedesktop.systemd.test",
 305                         "/",
 306                         "org.freedesktop.systemd.test",
 307                         "FileDescriptor",
 308                         &error,
 309                         NULL,
 310                         "h",
 311                         pp[1]);
 312         if (r < 0) {
 313                 log_error_errno(r, "Failed to issue method call: %m");
 314                 goto finish;
 315         }
 316
 317         errno = 0;
 318         if (read(pp[0], &x, 1) <= 0) {
 319                 log_error("Failed to read from pipe: %s", STRERROR_OR_EOF(errno));
 320                 goto finish;
 321         }
 322
 323         r = 0;
 324
 325 finish:
 326         if (bus) {
 327                 _cleanup_(sd_bus_message_unrefp) sd_bus_message *q = NULL;
 328
 329                 r = sd_bus_message_new_method_call(
 330                                 bus,
 331                                 &q,
 332                                 "org.freedesktop.systemd.test",
 333                                 "/",
 334                                 "org.freedesktop.systemd.test",
 335                                 "ExitClient1");
 336                 if (r < 0)
 337                         log_error_errno(r, "Failed to allocate method call: %m");
 338                 else
 339                         sd_bus_send(bus, q, NULL);
 340
 341         }
 342
 343         return INT_TO_PTR(r);
 344 }
 345
 346 static int quit_callback(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
 347         bool *x = userdata;
 348
 349         log_error_errno(sd_bus_message_get_errno(m), "Quit callback: %m");
 350
 351         *x = 1;
 352         return 1;
 353 }
 354
 355 static void* client2(void *p) {
 356         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
 357         _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
 358         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
 359         bool quit = false;
 360         const char *mid;
 361         int r;
 362
 363         r = sd_bus_open_user(&bus);
 364         if (r < 0) {
 365                 log_error_errno(r, "Failed to connect to user bus: %m");
 366                 goto finish;
 367         }
 368
 369         r = sd_bus_message_new_method_call(
 370                         bus,
 371                         &m,
 372                         "org.freedesktop.systemd.test",
 373                         "/foo/bar/waldo/piep",
 374                         "org.object.test",
 375                         "Foobar");
 376         if (r < 0) {
 377                 log_error_errno(r, "Failed to allocate method call: %m");
 378                 goto finish;
 379         }
 380
 381         r = sd_bus_send(bus, m, NULL);
 382         if (r < 0) {
 383                 log_error("Failed to issue method call: %s", bus_error_message(&error, r));
 384                 goto finish;
 385         }
 386
 387         m = sd_bus_message_unref(m);
 388
 389         r = sd_bus_message_new_signal(
 390                         bus,
 391                         &m,
 392                         "/foobar",
 393                         "foo.bar",
 394                         "Notify");
 395         if (r < 0) {
 396                 log_error_errno(r, "Failed to allocate signal: %m");
 397                 goto finish;
 398         }
 399
 400         r = sd_bus_send(bus, m, NULL);
 401         if (r < 0) {
 402                 log_error("Failed to issue signal: %s", bus_error_message(&error, r));
 403                 goto finish;
 404         }
 405
 406         m = sd_bus_message_unref(m);
 407
 408         r = sd_bus_message_new_signal_to(
 409                         bus,
 410                         &m,
 411                         "org.freedesktop.systemd.test",
 412                         "/foobar",
 413                         "foo.bar",
 414                         "NotifyTo");
 415         if (r < 0) {
 416                 log_error_errno(r, "Failed to allocate signal to: %m");
 417                 goto finish;
 418         }
 419
 420         r = sd_bus_send(bus, m, NULL);
 421         if (r < 0) {
 422                 log_error("Failed to issue signal to: %s", bus_error_message(&error, r));
 423                 goto finish;
 424         }
 425
 426         m = sd_bus_message_unref(m);
 427
 428         r = sd_bus_message_new_method_call(
 429                         bus,
 430                         &m,
 431                         "org.freedesktop.systemd.test",
 432                         "/",
 433                         "org.freedesktop.DBus.Peer",
 434                         "GetMachineId");
 435         if (r < 0) {
 436                 log_error_errno(r, "Failed to allocate method call: %m");
 437                 goto finish;
 438         }
 439
 440         r = sd_bus_call(bus, m, 0, &error, &reply);
 441         if (r < 0) {
 442                 log_error("Failed to issue method call: %s", bus_error_message(&error, r));
 443                 goto finish;
 444         }
 445
 446         r = sd_bus_message_read(reply, "s", &mid);
 447         if (r < 0) {
 448                 log_error_errno(r, "Failed to parse machine ID: %m");
 449                 goto finish;
 450         }
 451
 452         log_info("Machine ID is %s.", mid);
 453
 454         m = sd_bus_message_unref(m);
 455
 456         r = sd_bus_message_new_method_call(
 457                         bus,
 458                         &m,
 459                         "org.freedesktop.systemd.test",
 460                         "/",
 461                         "org.freedesktop.systemd.test",
 462                         "Slow");
 463         if (r < 0) {
 464                 log_error_errno(r, "Failed to allocate method call: %m");
 465                 goto finish;
 466         }
 467
 468         reply = sd_bus_message_unref(reply);
 469
 470         r = sd_bus_call(bus, m, 200 * USEC_PER_MSEC, &error, &reply);
 471         if (r < 0)
 472                 log_info("Failed to issue method call: %s", bus_error_message(&error, r));
 473         else
 474                 log_info("Slow call succeed.");
 475
 476         m = sd_bus_message_unref(m);
 477
 478         r = sd_bus_message_new_method_call(
 479                         bus,
 480                         &m,
 481                         "org.freedesktop.systemd.test",
 482                         "/",
 483                         "org.freedesktop.systemd.test",
 484                         "Slow");
 485         if (r < 0) {
 486                 log_error_errno(r, "Failed to allocate method call: %m");
 487                 goto finish;
 488         }
 489
 490         r = sd_bus_call_async(bus, NULL, m, quit_callback, &quit, 200 * USEC_PER_MSEC);
 491         if (r < 0) {
 492                 log_info("Failed to issue method call: %s", bus_error_message(&error, r));
 493                 goto finish;
 494         }
 495
 496         while (!quit) {
 497                 r = sd_bus_process(bus, NULL);
 498                 if (r < 0) {
 499                         log_error_errno(r, "Failed to process requests: %m");
 500                         goto finish;
 501                 }
 502                 if (r == 0) {
 503                         r = sd_bus_wait(bus, UINT64_MAX);
 504                         if (r < 0) {
 505                                 log_error_errno(r, "Failed to wait: %m");
 506                                 goto finish;
 507                         }
 508                 }
 509         }
 510
 511         r = 0;
 512
 513 finish:
 514         if (bus) {
 515                 _cleanup_(sd_bus_message_unrefp) sd_bus_message *q = NULL;
 516
 517                 r = sd_bus_message_new_method_call(
 518                                 bus,
 519                                 &q,
 520                                 "org.freedesktop.systemd.test",
 521                                 "/",
 522                                 "org.freedesktop.systemd.test",
 523                                 "ExitClient2");
 524                 if (r < 0) {
 525                         log_error_errno(r, "Failed to allocate method call: %m");
 526                         goto finish;
 527                 }
 528
 529                 (void) sd_bus_send(bus, q, NULL);
 530         }
 531
 532         return INT_TO_PTR(r);
 533 }
 534
 535 int main(int argc, char *argv[]) {
 536         pthread_t c1, c2;
 537         sd_bus *bus;
 538         void *p;
 539         int q, r;
 540
 541         test_setup_logging(LOG_INFO);
 542
 543         r = server_init(&bus);
 544         if (r < 0)
 545                 return log_tests_skipped("Failed to connect to bus");
 546
 547         log_info("Initialized...");
 548
 549         r = pthread_create(&c1, NULL, client1, bus);
 550         if (r != 0)
 551                 return EXIT_FAILURE;
 552
 553         r = pthread_create(&c2, NULL, client2, bus);
 554         if (r != 0)
 555                 return EXIT_FAILURE;
 556
 557         r = server(bus);
 558
 559         q = pthread_join(c1, &p);
 560         if (q != 0)
 561                 return EXIT_FAILURE;
 562         if (PTR_TO_INT(p) < 0)
 563                 return EXIT_FAILURE;
 564
 565         q = pthread_join(c2, &p);
 566         if (q != 0)
 567                 return EXIT_FAILURE;
 568         if (PTR_TO_INT(p) < 0)
 569                 return EXIT_FAILURE;
 570
 571         if (r < 0)
 572                 return EXIT_FAILURE;
 573
 574         return EXIT_SUCCESS;
 575 }