tests/regression/tools/live/live_test.cpp

   1 /*
   2  * Copyright (C) 2013 Julien Desfossez <jdesfossez@efficios.com>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-only
   5  *
   6  */
   7
   8 #include <common/common.hpp>
   9 #include <common/compat/endian.hpp>
  10 #include <common/compat/errno.hpp>
  11 #include <common/compat/time.hpp>
  12 #include <common/index/ctf-index.hpp>
  13
  14 #include <lttng/lttng.h>
  15
  16 #include <bin/lttng-relayd/lttng-viewer-abi.hpp>
  17 #include <fcntl.h>
  18 #include <inttypes.h>
  19 #include <netdb.h>
  20 #include <netinet/in.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <sys/mman.h>
  25 #include <sys/socket.h>
  26 #include <sys/stat.h>
  27 #include <sys/types.h>
  28 #include <tap/tap.h>
  29 #include <unistd.h>
  30 #include <urcu/list.h>
  31
  32 #define SESSION1   "test1"
  33 #define RELAYD_URL "net://localhost"
  34 #define LIVE_TIMER 2000000
  35
  36 /* Number of TAP tests in this file */
  37 #define NUM_TESTS 11
  38 #define mmap_size 524288
  39
  40 #ifdef HAVE_LIBLTTNG_UST_CTL
  41 #include <lttng/lttng-export.h>
  42 #include <lttng/ust-sigbus.h>
  43 LTTNG_EXPORT DEFINE_LTTNG_UST_SIGBUS_STATE();
  44 #endif
  45
  46 namespace {
  47 struct live_session *session;
  48 int control_sock;
  49
  50 int first_packet_offset;
  51 int first_packet_len;
  52 int first_packet_stream_id = -1;
  53
  54 struct viewer_stream {
  55         uint64_t id;
  56         uint64_t ctf_trace_id;
  57         void *mmap_base;
  58         int fd;
  59         int metadata_flag;
  60         int first_read;
  61         char path[PATH_MAX];
  62 };
  63
  64 struct live_session {
  65         struct viewer_stream *streams;
  66         uint64_t live_timer_interval;
  67         uint64_t stream_count;
  68 };
  69 } /* namespace */
  70
  71 static ssize_t lttng_live_recv(int fd, void *buf, size_t len)
  72 {
  73         ssize_t ret;
  74         size_t copied = 0, to_copy = len;
  75
  76         do {
  77                 ret = recv(fd, (char *) buf + copied, to_copy, 0);
  78                 if (ret > 0) {
  79                         LTTNG_ASSERT(ret <= to_copy);
  80                         copied += ret;
  81                         to_copy -= ret;
  82                 }
  83         } while ((ret > 0 && to_copy > 0) || (ret < 0 && errno == EINTR));
  84         if (ret > 0)
  85                 ret = copied;
  86         /* ret = 0 means orderly shutdown, ret < 0 is error. */
  87         return ret;
  88 }
  89
  90 static ssize_t lttng_live_send(int fd, const void *buf, size_t len)
  91 {
  92         ssize_t ret;
  93
  94         do {
  95                 ret = send(fd, buf, len, MSG_NOSIGNAL);
  96         } while (ret < 0 && errno == EINTR);
  97         return ret;
  98 }
  99
 100 static int connect_viewer(const char *hostname)
 101 {
 102         struct hostent *host;
 103         struct sockaddr_in server_addr;
 104         int ret;
 105
 106         host = gethostbyname(hostname);
 107         if (!host) {
 108                 ret = -1;
 109                 goto end;
 110         }
 111
 112         if ((control_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
 113                 PERROR("Socket");
 114                 ret = -1;
 115                 goto end;
 116         }
 117
 118         server_addr.sin_family = AF_INET;
 119         server_addr.sin_port = htons(5344);
 120         server_addr.sin_addr = *((struct in_addr *) host->h_addr);
 121         bzero(&(server_addr.sin_zero), 8);
 122
 123         if (connect(control_sock, (struct sockaddr *) &server_addr, sizeof(struct sockaddr)) ==
 124             -1) {
 125                 PERROR("Connect");
 126                 ret = -1;
 127                 goto end;
 128         }
 129
 130         server_addr.sin_family = AF_INET;
 131         server_addr.sin_port = htons(5345);
 132         server_addr.sin_addr = *((struct in_addr *) host->h_addr);
 133         bzero(&(server_addr.sin_zero), 8);
 134
 135         ret = 0;
 136
 137 end:
 138         return ret;
 139 }
 140
 141 static int establish_connection()
 142 {
 143         struct lttng_viewer_cmd cmd;
 144         struct lttng_viewer_connect connect;
 145         ssize_t ret_len;
 146
 147         cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT);
 148         cmd.data_size = htobe64(sizeof(connect));
 149         cmd.cmd_version = htobe32(0);
 150
 151         memset(&connect, 0, sizeof(connect));
 152         connect.major = htobe32(VERSION_MAJOR);
 153         connect.minor = htobe32(VERSION_MINOR);
 154         connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND);
 155
 156         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 157         if (ret_len < 0) {
 158                 diag("Error sending cmd");
 159                 goto error;
 160         }
 161         ret_len = lttng_live_send(control_sock, &connect, sizeof(connect));
 162         if (ret_len < 0) {
 163                 diag("Error sending version");
 164                 goto error;
 165         }
 166
 167         ret_len = lttng_live_recv(control_sock, &connect, sizeof(connect));
 168         if (ret_len == 0) {
 169                 diag("[error] Remote side has closed connection");
 170                 goto error;
 171         }
 172         if (ret_len < 0) {
 173                 diag("Error receiving version");
 174                 goto error;
 175         }
 176         return 0;
 177
 178 error:
 179         return -1;
 180 }
 181
 182 /*
 183  * Returns the number of sessions, should be 1 during the unit test.
 184  */
 185 static int list_sessions(uint64_t *session_id)
 186 {
 187         struct lttng_viewer_cmd cmd;
 188         struct lttng_viewer_list_sessions list;
 189         struct lttng_viewer_session lsession;
 190         int i;
 191         ssize_t ret_len;
 192         int first_session = 0;
 193
 194         cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS);
 195         cmd.data_size = htobe64(0);
 196         cmd.cmd_version = htobe32(0);
 197
 198         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 199         if (ret_len < 0) {
 200                 diag("Error sending cmd");
 201                 goto error;
 202         }
 203
 204         ret_len = lttng_live_recv(control_sock, &list, sizeof(list));
 205         if (ret_len == 0) {
 206                 diag("[error] Remote side has closed connection");
 207                 goto error;
 208         }
 209         if (ret_len < 0) {
 210                 diag("Error receiving session list");
 211                 goto error;
 212         }
 213
 214         for (i = 0; i < be32toh(list.sessions_count); i++) {
 215                 ret_len = lttng_live_recv(control_sock, &lsession, sizeof(lsession));
 216                 if (ret_len < 0) {
 217                         diag("Error receiving session");
 218                         goto error;
 219                 }
 220                 if (lsession.streams > 0 && first_session <= 0) {
 221                         first_session = be64toh(lsession.id);
 222                         *session_id = first_session;
 223                 }
 224         }
 225
 226         return be32toh(list.sessions_count);
 227
 228 error:
 229         return -1;
 230 }
 231
 232 static int create_viewer_session()
 233 {
 234         struct lttng_viewer_cmd cmd;
 235         struct lttng_viewer_create_session_response resp;
 236         ssize_t ret_len;
 237
 238         cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION);
 239         cmd.data_size = htobe64(0);
 240         cmd.cmd_version = htobe32(0);
 241
 242         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 243         if (ret_len < 0) {
 244                 diag("[error] Error sending cmd");
 245                 goto error;
 246         }
 247         LTTNG_ASSERT(ret_len == sizeof(cmd));
 248
 249         ret_len = lttng_live_recv(control_sock, &resp, sizeof(resp));
 250         if (ret_len == 0) {
 251                 diag("[error] Remote side has closed connection");
 252                 goto error;
 253         }
 254         if (ret_len < 0) {
 255                 diag("[error] Error receiving create session reply");
 256                 goto error;
 257         }
 258         LTTNG_ASSERT(ret_len == sizeof(resp));
 259
 260         if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) {
 261                 diag("[error] Error creating viewer session");
 262                 goto error;
 263         }
 264         return 0;
 265
 266 error:
 267         return -1;
 268 }
 269
 270 static int attach_session(uint64_t id)
 271 {
 272         struct lttng_viewer_cmd cmd;
 273         struct lttng_viewer_attach_session_request rq;
 274         struct lttng_viewer_attach_session_response rp;
 275         struct lttng_viewer_stream stream;
 276         int i;
 277         ssize_t ret_len;
 278
 279         session = zmalloc<live_session>();
 280         if (!session) {
 281                 goto error;
 282         }
 283
 284         cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION);
 285         cmd.data_size = htobe64(sizeof(rq));
 286         cmd.cmd_version = htobe32(0);
 287
 288         memset(&rq, 0, sizeof(rq));
 289         rq.session_id = htobe64(id);
 290         rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING);
 291
 292         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 293         if (ret_len < 0) {
 294                 diag("Error sending cmd LTTNG_VIEWER_ATTACH_SESSION");
 295                 goto error;
 296         }
 297         ret_len = lttng_live_send(control_sock, &rq, sizeof(rq));
 298         if (ret_len < 0) {
 299                 diag("Error sending attach request");
 300                 goto error;
 301         }
 302
 303         ret_len = lttng_live_recv(control_sock, &rp, sizeof(rp));
 304         if (ret_len == 0) {
 305                 diag("[error] Remote side has closed connection");
 306                 goto error;
 307         }
 308         if (ret_len < 0) {
 309                 diag("Error receiving attach response");
 310                 goto error;
 311         }
 312         if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) {
 313                 goto error;
 314         }
 315
 316         session->stream_count = be32toh(rp.streams_count);
 317         if (session->stream_count == 0) {
 318                 diag("Got session stream count == 0");
 319                 goto error;
 320         }
 321         session->streams = calloc<viewer_stream>(session->stream_count);
 322         if (!session->streams) {
 323                 goto error;
 324         }
 325
 326         for (i = 0; i < be32toh(rp.streams_count); i++) {
 327                 ret_len = lttng_live_recv(control_sock, &stream, sizeof(stream));
 328                 if (ret_len == 0) {
 329                         diag("[error] Remote side has closed connection");
 330                         goto error;
 331                 }
 332                 if (ret_len < 0) {
 333                         diag("Error receiving stream");
 334                         goto error;
 335                 }
 336                 session->streams[i].id = be64toh(stream.id);
 337
 338                 session->streams[i].ctf_trace_id = be64toh(stream.ctf_trace_id);
 339                 session->streams[i].first_read = 1;
 340                 session->streams[i].mmap_base = mmap(nullptr,
 341                                                      mmap_size,
 342                                                      PROT_READ | PROT_WRITE,
 343                                                      MAP_PRIVATE | MAP_ANONYMOUS,
 344                                                      -1,
 345                                                      0);
 346                 if (session->streams[i].mmap_base == MAP_FAILED) {
 347                         diag("mmap error");
 348                         goto error;
 349                 }
 350
 351                 if (be32toh(stream.metadata_flag)) {
 352                         session->streams[i].metadata_flag = 1;
 353                 }
 354         }
 355         return session->stream_count;
 356
 357 error:
 358         return -1;
 359 }
 360
 361 static int get_metadata()
 362 {
 363         struct lttng_viewer_cmd cmd;
 364         struct lttng_viewer_get_metadata rq;
 365         struct lttng_viewer_metadata_packet rp;
 366         ssize_t ret_len;
 367         int ret;
 368         uint64_t i;
 369         char *data = nullptr;
 370         uint64_t len = 0;
 371         int metadata_stream_id = -1;
 372
 373         cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA);
 374         cmd.data_size = htobe64(sizeof(rq));
 375         cmd.cmd_version = htobe32(0);
 376
 377         for (i = 0; i < session->stream_count; i++) {
 378                 if (session->streams[i].metadata_flag) {
 379                         metadata_stream_id = i;
 380                         break;
 381                 }
 382         }
 383
 384         if (metadata_stream_id < 0) {
 385                 diag("No metadata stream found");
 386                 goto error;
 387         }
 388
 389         rq.stream_id = htobe64(session->streams[metadata_stream_id].id);
 390
 391 retry:
 392         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 393         if (ret_len < 0) {
 394                 diag("Error sending cmd");
 395                 goto error;
 396         }
 397         ret_len = lttng_live_send(control_sock, &rq, sizeof(rq));
 398         if (ret_len < 0) {
 399                 diag("Error sending get_metadata request");
 400                 goto error;
 401         }
 402         ret_len = lttng_live_recv(control_sock, &rp, sizeof(rp));
 403         if (ret_len == 0) {
 404                 diag("[error] Remote side has closed connection");
 405                 goto error;
 406         }
 407         if (ret_len < 0) {
 408                 diag("Error receiving metadata response");
 409                 goto error;
 410         }
 411         switch (be32toh(rp.status)) {
 412         case LTTNG_VIEWER_METADATA_OK:
 413                 break;
 414         case LTTNG_VIEWER_NO_NEW_METADATA:
 415                 diag("Got LTTNG_VIEWER_NO_NEW_METADATA:");
 416                 usleep(50);
 417                 goto retry;
 418         case LTTNG_VIEWER_METADATA_ERR:
 419                 diag("Got LTTNG_VIEWER_METADATA_ERR:");
 420                 goto error;
 421         default:
 422                 diag("Got unknown status during LTTNG_VIEWER_GET_METADATA");
 423                 goto error;
 424         }
 425
 426         len = be64toh(rp.len);
 427         if (len <= 0) {
 428                 goto error;
 429         }
 430
 431         data = calloc<char>(len);
 432         if (!data) {
 433                 PERROR("relay data zmalloc");
 434                 goto error;
 435         }
 436         ret_len = lttng_live_recv(control_sock, data, len);
 437         if (ret_len == 0) {
 438                 diag("[error] Remote side has closed connection");
 439                 goto error_free_data;
 440         }
 441         if (ret_len < 0) {
 442                 diag("Error receiving trace packet");
 443                 goto error_free_data;
 444         }
 445         free(data);
 446         ret = len;
 447
 448         return ret;
 449
 450 error_free_data:
 451         free(data);
 452 error:
 453         return -1;
 454 }
 455
 456 static int get_next_index()
 457 {
 458         struct lttng_viewer_cmd cmd;
 459         struct lttng_viewer_get_next_index rq;
 460         struct lttng_viewer_index rp;
 461         ssize_t ret_len;
 462         int id;
 463
 464         cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX);
 465         cmd.data_size = htobe64(sizeof(rq));
 466         cmd.cmd_version = htobe32(0);
 467
 468         for (id = 0; id < session->stream_count; id++) {
 469                 if (session->streams[id].metadata_flag) {
 470                         continue;
 471                 }
 472                 memset(&rq, 0, sizeof(rq));
 473                 rq.stream_id = htobe64(session->streams[id].id);
 474
 475         retry:
 476                 ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 477                 if (ret_len < 0) {
 478                         diag("Error sending cmd");
 479                         goto error;
 480                 }
 481                 ret_len = lttng_live_send(control_sock, &rq, sizeof(rq));
 482                 if (ret_len < 0) {
 483                         diag("Error sending get_next_index request");
 484                         goto error;
 485                 }
 486                 ret_len = lttng_live_recv(control_sock, &rp, sizeof(rp));
 487                 if (ret_len == 0) {
 488                         diag("[error] Remote side has closed connection");
 489                         goto error;
 490                 }
 491                 if (ret_len < 0) {
 492                         diag("Error receiving index response");
 493                         goto error;
 494                 }
 495
 496                 rp.flags = be32toh(rp.flags);
 497
 498                 switch (be32toh(rp.status)) {
 499                 case LTTNG_VIEWER_INDEX_INACTIVE:
 500                         /* Skip this stream. */
 501                         diag("Got LTTNG_VIEWER_INDEX_INACTIVE");
 502                         continue;
 503                 case LTTNG_VIEWER_INDEX_OK:
 504                         break;
 505                 case LTTNG_VIEWER_INDEX_RETRY:
 506                         sleep(1);
 507                         goto retry;
 508                 case LTTNG_VIEWER_INDEX_HUP:
 509                         diag("Got LTTNG_VIEWER_INDEX_HUP");
 510                         session->streams[id].id = -1ULL;
 511                         session->streams[id].fd = -1;
 512                         goto error;
 513                 case LTTNG_VIEWER_INDEX_ERR:
 514                         diag("Got LTTNG_VIEWER_INDEX_ERR");
 515                         goto error;
 516                 default:
 517                         diag("Unknown reply status during LTTNG_VIEWER_GET_NEXT_INDEX (%d)",
 518                              be32toh(rp.status));
 519                         goto error;
 520                 }
 521                 if (first_packet_stream_id < 0) {
 522                         /*
 523                          * Initialize the first packet stream id. That is,
 524                          * the first active stream encoutered.
 525                          */
 526                         first_packet_offset = be64toh(rp.offset);
 527                         first_packet_len = be64toh(rp.packet_size) / CHAR_BIT;
 528                         first_packet_stream_id = id;
 529                         diag("Got first packet index with offset %d and len %d",
 530                              first_packet_offset,
 531                              first_packet_len);
 532                 }
 533         }
 534         return 0;
 535
 536 error:
 537         return -1;
 538 }
 539
 540 static int get_data_packet(int id, uint64_t offset, uint64_t len)
 541 {
 542         struct lttng_viewer_cmd cmd;
 543         struct lttng_viewer_get_packet rq;
 544         struct lttng_viewer_trace_packet rp;
 545         ssize_t ret_len;
 546
 547         cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET);
 548         cmd.data_size = htobe64(sizeof(rq));
 549         cmd.cmd_version = htobe32(0);
 550
 551         memset(&rq, 0, sizeof(rq));
 552         rq.stream_id = htobe64(session->streams[id].id);
 553         /* Already in big endian. */
 554         rq.offset = offset;
 555         rq.len = htobe32(len);
 556
 557         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 558         if (ret_len < 0) {
 559                 diag("Error sending cmd");
 560                 goto error;
 561         }
 562         ret_len = lttng_live_send(control_sock, &rq, sizeof(rq));
 563         if (ret_len < 0) {
 564                 diag("Error sending get_data_packet request");
 565                 goto error;
 566         }
 567         ret_len = lttng_live_recv(control_sock, &rp, sizeof(rp));
 568         if (ret_len == 0) {
 569                 diag("[error] Remote side has closed connection");
 570                 goto error;
 571         }
 572         if (ret_len < 0) {
 573                 diag("Error receiving data response");
 574                 goto error;
 575         }
 576         rp.flags = be32toh(rp.flags);
 577
 578         switch (be32toh(rp.status)) {
 579         case LTTNG_VIEWER_GET_PACKET_OK:
 580                 len = be32toh(rp.len);
 581                 if (len == 0) {
 582                         diag("Got LTTNG_VIEWER_GET_PACKET_OK, but len == 0");
 583                         goto error;
 584                 }
 585                 break;
 586         case LTTNG_VIEWER_GET_PACKET_RETRY:
 587                 diag("Got LTTNG_VIEWER_GET_PACKET_RETRY:");
 588                 goto error;
 589         case LTTNG_VIEWER_GET_PACKET_ERR:
 590                 if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) {
 591                         diag("Got LTTNG_VIEWER_GET_PACKET_ERR with NEW_METADATA flag");
 592                         goto end;
 593                 }
 594                 diag("Got LTTNG_VIEWER_GET_PACKET_ERR:");
 595                 goto error;
 596         default:
 597                 diag("Got unknown status code during LTTNG_VIEWER_GET_PACKET");
 598                 goto error;
 599         }
 600
 601         if (len > mmap_size) {
 602                 diag("mmap_size not big enough");
 603                 goto error;
 604         }
 605
 606         ret_len = lttng_live_recv(control_sock, session->streams[id].mmap_base, len);
 607         if (ret_len == 0) {
 608                 diag("[error] Remote side has closed connection");
 609                 goto error;
 610         }
 611         if (ret_len < 0) {
 612                 diag("Error receiving trace packet");
 613                 goto error;
 614         }
 615 end:
 616         return 0;
 617 error:
 618         return -1;
 619 }
 620
 621 static int detach_viewer_session(uint64_t id)
 622 {
 623         struct lttng_viewer_cmd cmd;
 624         struct lttng_viewer_detach_session_response resp;
 625         struct lttng_viewer_detach_session_request rq;
 626         int ret;
 627         ssize_t ret_len;
 628
 629         cmd.cmd = htobe32(LTTNG_VIEWER_DETACH_SESSION);
 630         cmd.data_size = htobe64(sizeof(rq));
 631         cmd.cmd_version = htobe32(0);
 632
 633         memset(&rq, 0, sizeof(rq));
 634         rq.session_id = htobe64(id);
 635
 636         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 637         if (ret_len < 0) {
 638                 fprintf(stderr, "[error] Error sending cmd\n");
 639                 ret = ret_len;
 640                 goto error;
 641         }
 642
 643         ret_len = lttng_live_send(control_sock, &rq, sizeof(rq));
 644         if (ret_len < 0) {
 645                 fprintf(stderr, "Error sending attach request\n");
 646                 ret = ret_len;
 647                 goto error;
 648         }
 649
 650         ret_len = lttng_live_recv(control_sock, &resp, sizeof(resp));
 651         if (ret_len < 0) {
 652                 fprintf(stderr, "[error] Error receiving detach session reply\n");
 653                 ret = ret_len;
 654                 goto error;
 655         }
 656
 657         if (be32toh(resp.status) != LTTNG_VIEWER_DETACH_SESSION_OK) {
 658                 fprintf(stderr, "[error] Error detaching viewer session\n");
 659                 ret = -1;
 660                 goto error;
 661         }
 662         ret = 0;
 663
 664 error:
 665         return ret;
 666 }
 667
 668 int main()
 669 {
 670         int ret;
 671         uint64_t session_id;
 672
 673         plan_tests(NUM_TESTS);
 674
 675         diag("Live unit tests");
 676
 677         ret = connect_viewer("localhost");
 678         ok(ret == 0, "Connect viewer to relayd");
 679
 680         ret = establish_connection();
 681         ok(ret == 0,
 682            "Established connection and version check with %d.%d",
 683            VERSION_MAJOR,
 684            VERSION_MINOR);
 685
 686         ret = list_sessions(&session_id);
 687         ok(ret > 0, "List sessions : %d session(s)", ret);
 688         if (ret < 0) {
 689                 goto end;
 690         }
 691
 692         ret = create_viewer_session();
 693         ok(ret == 0, "Create viewer session");
 694
 695         ret = attach_session(session_id);
 696         ok(ret > 0, "Attach to session, %d stream(s) received", ret);
 697
 698         ret = get_metadata();
 699         ok(ret > 0, "Get metadata, received %d bytes", ret);
 700
 701         ret = get_next_index();
 702         ok(ret == 0, "Get one index per stream");
 703
 704         ret = get_data_packet(first_packet_stream_id, first_packet_offset, first_packet_len);
 705         ok(ret == 0,
 706            "Get one data packet for stream %d, offset %d, len %d",
 707            first_packet_stream_id,
 708            first_packet_offset,
 709            first_packet_len);
 710
 711         ret = detach_viewer_session(session_id);
 712         ok(ret == 0, "Detach viewer session");
 713
 714         ret = list_sessions(&session_id);
 715         ok(ret > 0, "List sessions : %d session(s)", ret);
 716
 717         ret = attach_session(session_id);
 718         ok(ret > 0, "Attach to session, %d streams received", ret);
 719 end:
 720         return exit_status();
 721 }