tests/regression/tools/live/live_test.c

   1 /*
   2  * Copyright (C) 2013 Julien Desfossez <jdesfossez@efficios.com>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-only
   5  *
   6  */
   7
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <unistd.h>
  12 #include <common/compat/time.h>
  13 #include <sys/types.h>
  14 #include <inttypes.h>
  15 #include <stdlib.h>
  16 #include <sys/socket.h>
  17 #include <netinet/in.h>
  18 #include <netdb.h>
  19 #include <fcntl.h>
  20 #include <sys/mman.h>
  21 #include <sys/stat.h>
  22
  23 #include <tap/tap.h>
  24 #include <lttng/lttng.h>
  25
  26 #include <urcu/list.h>
  27 #include <common/common.h>
  28
  29 #include <bin/lttng-relayd/lttng-viewer-abi.h>
  30 #include <common/index/ctf-index.h>
  31
  32 #include <common/compat/errno.h>
  33 #include <common/compat/endian.h>
  34
  35 #define SESSION1 "test1"
  36 #define RELAYD_URL "net://localhost"
  37 #define LIVE_TIMER 2000000
  38
  39 /* Number of TAP tests in this file */
  40 #define NUM_TESTS 11
  41 #define mmap_size 524288
  42
  43 #ifdef HAVE_LIBLTTNG_UST_CTL
  44 #include <lttng/ust-sigbus.h>
  45 DEFINE_LTTNG_UST_SIGBUS_STATE();
  46 #endif
  47
  48 static int control_sock;
  49 struct live_session *session;
  50
  51 static int first_packet_offset;
  52 static int first_packet_len;
  53 static int first_packet_stream_id = -1;
  54
  55 struct viewer_stream {
  56         uint64_t id;
  57         uint64_t ctf_trace_id;
  58         void *mmap_base;
  59         int fd;
  60         int metadata_flag;
  61         int first_read;
  62         char path[PATH_MAX];
  63 };
  64
  65 struct live_session {
  66         struct viewer_stream *streams;
  67         uint64_t live_timer_interval;
  68         uint64_t stream_count;
  69 };
  70
  71 static
  72 ssize_t lttng_live_recv(int fd, void *buf, size_t len)
  73 {
  74         ssize_t ret;
  75         size_t copied = 0, to_copy = len;
  76
  77         do {
  78                 ret = recv(fd, buf + copied, to_copy, 0);
  79                 if (ret > 0) {
  80                         LTTNG_ASSERT(ret <= to_copy);
  81                         copied += ret;
  82                         to_copy -= ret;
  83                 }
  84         } while ((ret > 0 && to_copy > 0)
  85                 || (ret < 0 && errno == EINTR));
  86         if (ret > 0)
  87                 ret = copied;
  88         /* ret = 0 means orderly shutdown, ret < 0 is error. */
  89         return ret;
  90 }
  91
  92 static
  93 ssize_t lttng_live_send(int fd, const void *buf, size_t len)
  94 {
  95         ssize_t ret;
  96
  97         do {
  98                 ret = send(fd, buf, len, MSG_NOSIGNAL);
  99         } while (ret < 0 && errno == EINTR);
 100         return ret;
 101 }
 102
 103 static
 104 int connect_viewer(const char *hostname)
 105 {
 106         struct hostent *host;
 107         struct sockaddr_in server_addr;
 108         int ret;
 109
 110         host = gethostbyname(hostname);
 111         if (!host) {
 112                 ret = -1;
 113                 goto end;
 114         }
 115
 116         if ((control_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
 117                 PERROR("Socket");
 118                 ret = -1;
 119                 goto end;
 120         }
 121
 122         server_addr.sin_family = AF_INET;
 123         server_addr.sin_port = htons(5344);
 124         server_addr.sin_addr = *((struct in_addr *) host->h_addr);
 125         bzero(&(server_addr.sin_zero), 8);
 126
 127         if (connect(control_sock, (struct sockaddr *) &server_addr,
 128                                 sizeof(struct sockaddr)) == -1) {
 129                 PERROR("Connect");
 130                 ret = -1;
 131                 goto end;
 132         }
 133
 134         server_addr.sin_family = AF_INET;
 135         server_addr.sin_port = htons(5345);
 136         server_addr.sin_addr = *((struct in_addr *) host->h_addr);
 137         bzero(&(server_addr.sin_zero), 8);
 138
 139         ret = 0;
 140
 141 end:
 142         return ret;
 143 }
 144
 145 static
 146 int establish_connection(void)
 147 {
 148         struct lttng_viewer_cmd cmd;
 149         struct lttng_viewer_connect connect;
 150         ssize_t ret_len;
 151
 152         cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT);
 153         cmd.data_size = htobe64(sizeof(connect));
 154         cmd.cmd_version = htobe32(0);
 155
 156         memset(&connect, 0, sizeof(connect));
 157         connect.major = htobe32(VERSION_MAJOR);
 158         connect.minor = htobe32(VERSION_MINOR);
 159         connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND);
 160
 161         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 162         if (ret_len < 0) {
 163                 diag("Error sending cmd");
 164                 goto error;
 165         }
 166         ret_len = lttng_live_send(control_sock, &connect, sizeof(connect));
 167         if (ret_len < 0) {
 168                 diag("Error sending version");
 169                 goto error;
 170         }
 171
 172         ret_len = lttng_live_recv(control_sock, &connect, sizeof(connect));
 173         if (ret_len == 0) {
 174                 diag("[error] Remote side has closed connection");
 175                 goto error;
 176         }
 177         if (ret_len < 0) {
 178                 diag("Error receiving version");
 179                 goto error;
 180         }
 181         return 0;
 182
 183 error:
 184         return -1;
 185 }
 186
 187 /*
 188  * Returns the number of sessions, should be 1 during the unit test.
 189  */
 190 static
 191 int list_sessions(uint64_t *session_id)
 192 {
 193         struct lttng_viewer_cmd cmd;
 194         struct lttng_viewer_list_sessions list;
 195         struct lttng_viewer_session lsession;
 196         int i;
 197         ssize_t ret_len;
 198         int first_session = 0;
 199
 200         cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS);
 201         cmd.data_size = htobe64(0);
 202         cmd.cmd_version = htobe32(0);
 203
 204         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 205         if (ret_len < 0) {
 206                 diag("Error sending cmd");
 207                 goto error;
 208         }
 209
 210         ret_len = lttng_live_recv(control_sock, &list, sizeof(list));
 211         if (ret_len == 0) {
 212                 diag("[error] Remote side has closed connection");
 213                 goto error;
 214         }
 215         if (ret_len < 0) {
 216                 diag("Error receiving session list");
 217                 goto error;
 218         }
 219
 220         for (i = 0; i < be32toh(list.sessions_count); i++) {
 221                 ret_len = lttng_live_recv(control_sock, &lsession, sizeof(lsession));
 222                 if (ret_len < 0) {
 223                         diag("Error receiving session");
 224                         goto error;
 225                 }
 226                 if (lsession.streams > 0 && first_session <= 0) {
 227                         first_session = be64toh(lsession.id);
 228                         *session_id = first_session;
 229                 }
 230         }
 231
 232         return be32toh(list.sessions_count);
 233
 234 error:
 235         return -1;
 236 }
 237
 238 static
 239 int create_viewer_session(void)
 240 {
 241         struct lttng_viewer_cmd cmd;
 242         struct lttng_viewer_create_session_response resp;
 243         ssize_t ret_len;
 244
 245         cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION);
 246         cmd.data_size = htobe64(0);
 247         cmd.cmd_version = htobe32(0);
 248
 249         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 250         if (ret_len < 0) {
 251                 diag("[error] Error sending cmd");
 252                 goto error;
 253         }
 254         LTTNG_ASSERT(ret_len == sizeof(cmd));
 255
 256         ret_len = lttng_live_recv(control_sock, &resp, sizeof(resp));
 257         if (ret_len == 0) {
 258                 diag("[error] Remote side has closed connection");
 259                 goto error;
 260         }
 261         if (ret_len < 0) {
 262                 diag("[error] Error receiving create session reply");
 263                 goto error;
 264         }
 265         LTTNG_ASSERT(ret_len == sizeof(resp));
 266
 267         if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) {
 268                 diag("[error] Error creating viewer session");
 269                 goto error;
 270         }
 271         return 0;
 272
 273 error:
 274         return -1;
 275 }
 276
 277 static
 278 int attach_session(uint64_t id)
 279 {
 280         struct lttng_viewer_cmd cmd;
 281         struct lttng_viewer_attach_session_request rq;
 282         struct lttng_viewer_attach_session_response rp;
 283         struct lttng_viewer_stream stream;
 284         int i;
 285         ssize_t ret_len;
 286
 287         session = zmalloc(sizeof(struct live_session));
 288         if (!session) {
 289                 goto error;
 290         }
 291
 292         cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION);
 293         cmd.data_size = htobe64(sizeof(rq));
 294         cmd.cmd_version = htobe32(0);
 295
 296         memset(&rq, 0, sizeof(rq));
 297         rq.session_id = htobe64(id);
 298         rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING);
 299
 300         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 301         if (ret_len < 0) {
 302                 diag("Error sending cmd LTTNG_VIEWER_ATTACH_SESSION");
 303                 goto error;
 304         }
 305         ret_len = lttng_live_send(control_sock, &rq, sizeof(rq));
 306         if (ret_len < 0) {
 307                 diag("Error sending attach request");
 308                 goto error;
 309         }
 310
 311         ret_len = lttng_live_recv(control_sock, &rp, sizeof(rp));
 312         if (ret_len == 0) {
 313                 diag("[error] Remote side has closed connection");
 314                 goto error;
 315         }
 316         if (ret_len < 0) {
 317                 diag("Error receiving attach response");
 318                 goto error;
 319         }
 320         if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) {
 321                 goto error;
 322         }
 323
 324         session->stream_count = be32toh(rp.streams_count);
 325         if (session->stream_count == 0) {
 326                 diag("Got session stream count == 0");
 327                 goto error;
 328         }
 329         session->streams = zmalloc(session->stream_count *
 330                         sizeof(struct viewer_stream));
 331         if (!session->streams) {
 332                 goto error;
 333         }
 334
 335         for (i = 0; i < be32toh(rp.streams_count); i++) {
 336                 ret_len = lttng_live_recv(control_sock, &stream, sizeof(stream));
 337                 if (ret_len == 0) {
 338                         diag("[error] Remote side has closed connection");
 339                         goto error;
 340                 }
 341                 if (ret_len < 0) {
 342                         diag("Error receiving stream");
 343                         goto error;
 344                 }
 345                 session->streams[i].id = be64toh(stream.id);
 346
 347                 session->streams[i].ctf_trace_id = be64toh(stream.ctf_trace_id);
 348                 session->streams[i].first_read = 1;
 349                 session->streams[i].mmap_base = mmap(NULL, mmap_size,
 350                                 PROT_READ | PROT_WRITE,
 351                                 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
 352                 if (session->streams[i].mmap_base == MAP_FAILED) {
 353                         diag("mmap error");
 354                         goto error;
 355                 }
 356
 357                 if (be32toh(stream.metadata_flag)) {
 358                         session->streams[i].metadata_flag = 1;
 359                 }
 360         }
 361         return session->stream_count;
 362
 363 error:
 364         return -1;
 365 }
 366
 367 static
 368 int get_metadata(void)
 369 {
 370         struct lttng_viewer_cmd cmd;
 371         struct lttng_viewer_get_metadata rq;
 372         struct lttng_viewer_metadata_packet rp;
 373         ssize_t ret_len;
 374         int ret;
 375         uint64_t i;
 376         char *data = NULL;
 377         uint64_t len = 0;
 378         int metadata_stream_id = -1;
 379
 380         cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA);
 381         cmd.data_size = htobe64(sizeof(rq));
 382         cmd.cmd_version = htobe32(0);
 383
 384         for (i = 0; i < session->stream_count; i++) {
 385                 if (session->streams[i].metadata_flag) {
 386                         metadata_stream_id = i;
 387                         break;
 388                 }
 389         }
 390
 391         if (metadata_stream_id < 0) {
 392                 diag("No metadata stream found");
 393                 goto error;
 394         }
 395
 396         rq.stream_id = htobe64(session->streams[metadata_stream_id].id);
 397
 398 retry:
 399         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 400         if (ret_len < 0) {
 401                 diag("Error sending cmd");
 402                 goto error;
 403         }
 404         ret_len = lttng_live_send(control_sock, &rq, sizeof(rq));
 405         if (ret_len < 0) {
 406                 diag("Error sending get_metadata request");
 407                 goto error;
 408         }
 409         ret_len = lttng_live_recv(control_sock, &rp, sizeof(rp));
 410         if (ret_len == 0) {
 411                 diag("[error] Remote side has closed connection");
 412                 goto error;
 413         }
 414         if (ret_len < 0) {
 415                 diag("Error receiving metadata response");
 416                 goto error;
 417         }
 418         switch (be32toh(rp.status)) {
 419         case LTTNG_VIEWER_METADATA_OK:
 420                 break;
 421         case LTTNG_VIEWER_NO_NEW_METADATA:
 422                 diag("Got LTTNG_VIEWER_NO_NEW_METADATA:");
 423                 usleep(50);
 424                 goto retry;
 425         case LTTNG_VIEWER_METADATA_ERR:
 426                 diag("Got LTTNG_VIEWER_METADATA_ERR:");
 427                 goto error;
 428         default:
 429                 diag("Got unknown status during LTTNG_VIEWER_GET_METADATA");
 430                 goto error;
 431         }
 432
 433         len = be64toh(rp.len);
 434         if (len <= 0) {
 435                 goto error;
 436         }
 437
 438         data = zmalloc(len);
 439         if (!data) {
 440                 PERROR("relay data zmalloc");
 441                 goto error;
 442         }
 443         ret_len = lttng_live_recv(control_sock, data, len);
 444         if (ret_len == 0) {
 445                 diag("[error] Remote side has closed connection");
 446                 goto error_free_data;
 447         }
 448         if (ret_len < 0) {
 449                 diag("Error receiving trace packet");
 450                 goto error_free_data;
 451         }
 452         free(data);
 453         ret = len;
 454
 455         return ret;
 456
 457 error_free_data:
 458         free(data);
 459 error:
 460         return -1;
 461 }
 462
 463 static
 464 int get_next_index(void)
 465 {
 466         struct lttng_viewer_cmd cmd;
 467         struct lttng_viewer_get_next_index rq;
 468         struct lttng_viewer_index rp;
 469         ssize_t ret_len;
 470         int id;
 471
 472         cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX);
 473         cmd.data_size = htobe64(sizeof(rq));
 474         cmd.cmd_version = htobe32(0);
 475
 476         for (id = 0; id < session->stream_count; id++) {
 477                 if (session->streams[id].metadata_flag) {
 478                         continue;
 479                 }
 480                 memset(&rq, 0, sizeof(rq));
 481                 rq.stream_id = htobe64(session->streams[id].id);
 482
 483 retry:
 484                 ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 485                 if (ret_len < 0) {
 486                         diag("Error sending cmd");
 487                         goto error;
 488                 }
 489                 ret_len = lttng_live_send(control_sock, &rq, sizeof(rq));
 490                 if (ret_len < 0) {
 491                         diag("Error sending get_next_index request");
 492                         goto error;
 493                 }
 494                 ret_len = lttng_live_recv(control_sock, &rp, sizeof(rp));
 495                 if (ret_len == 0) {
 496                         diag("[error] Remote side has closed connection");
 497                         goto error;
 498                 }
 499                 if (ret_len < 0) {
 500                         diag("Error receiving index response");
 501                         goto error;
 502                 }
 503
 504                 rp.flags = be32toh(rp.flags);
 505
 506                 switch (be32toh(rp.status)) {
 507                 case LTTNG_VIEWER_INDEX_INACTIVE:
 508                         /* Skip this stream. */
 509                         diag("Got LTTNG_VIEWER_INDEX_INACTIVE");
 510                         continue;
 511                 case LTTNG_VIEWER_INDEX_OK:
 512                         break;
 513                 case LTTNG_VIEWER_INDEX_RETRY:
 514                         sleep(1);
 515                         goto retry;
 516                 case LTTNG_VIEWER_INDEX_HUP:
 517                         diag("Got LTTNG_VIEWER_INDEX_HUP");
 518                         session->streams[id].id = -1ULL;
 519                         session->streams[id].fd = -1;
 520                         goto error;
 521                 case LTTNG_VIEWER_INDEX_ERR:
 522                         diag("Got LTTNG_VIEWER_INDEX_ERR");
 523                         goto error;
 524                 default:
 525                         diag("Unknown reply status during LTTNG_VIEWER_GET_NEXT_INDEX (%d)", be32toh(rp.status));
 526                         goto error;
 527                 }
 528                 if (first_packet_stream_id < 0) {
 529                         /*
 530                          * Initialize the first packet stream id. That is,
 531                          * the first active stream encoutered.
 532                          */
 533                         first_packet_offset = be64toh(rp.offset);
 534                         first_packet_len = be64toh(rp.packet_size) / CHAR_BIT;
 535                         first_packet_stream_id = id;
 536                         diag("Got first packet index with offset %d and len %d",
 537                                         first_packet_offset, first_packet_len);
 538                 }
 539         }
 540         return 0;
 541
 542 error:
 543         return -1;
 544 }
 545
 546 static
 547 int get_data_packet(int id, uint64_t offset,
 548                 uint64_t len)
 549 {
 550         struct lttng_viewer_cmd cmd;
 551         struct lttng_viewer_get_packet rq;
 552         struct lttng_viewer_trace_packet rp;
 553         ssize_t ret_len;
 554
 555         cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET);
 556         cmd.data_size = htobe64(sizeof(rq));
 557         cmd.cmd_version = htobe32(0);
 558
 559         memset(&rq, 0, sizeof(rq));
 560         rq.stream_id = htobe64(session->streams[id].id);
 561         /* Already in big endian. */
 562         rq.offset = offset;
 563         rq.len = htobe32(len);
 564
 565         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 566         if (ret_len < 0) {
 567                 diag("Error sending cmd");
 568                 goto error;
 569         }
 570         ret_len = lttng_live_send(control_sock, &rq, sizeof(rq));
 571         if (ret_len < 0) {
 572                 diag("Error sending get_data_packet request");
 573                 goto error;
 574         }
 575         ret_len = lttng_live_recv(control_sock, &rp, sizeof(rp));
 576         if (ret_len == 0) {
 577                 diag("[error] Remote side has closed connection");
 578                 goto error;
 579         }
 580         if (ret_len < 0) {
 581                 diag("Error receiving data response");
 582                 goto error;
 583         }
 584         rp.flags = be32toh(rp.flags);
 585
 586         switch (be32toh(rp.status)) {
 587         case LTTNG_VIEWER_GET_PACKET_OK:
 588                 len = be32toh(rp.len);
 589                 if (len == 0) {
 590                         diag("Got LTTNG_VIEWER_GET_PACKET_OK, but len == 0");
 591                         goto error;
 592                 }
 593                 break;
 594         case LTTNG_VIEWER_GET_PACKET_RETRY:
 595                 diag("Got LTTNG_VIEWER_GET_PACKET_RETRY:");
 596                 goto error;
 597         case LTTNG_VIEWER_GET_PACKET_ERR:
 598                 if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) {
 599                         diag("Got LTTNG_VIEWER_GET_PACKET_ERR with NEW_METADATA flag");
 600                         goto end;
 601                 }
 602                 diag("Got LTTNG_VIEWER_GET_PACKET_ERR:");
 603                 goto error;
 604         default:
 605                 diag("Got unknown status code during LTTNG_VIEWER_GET_PACKET");
 606                 goto error;
 607         }
 608
 609         if (len > mmap_size) {
 610                 diag("mmap_size not big enough");
 611                 goto error;
 612         }
 613
 614         ret_len = lttng_live_recv(control_sock, session->streams[id].mmap_base, len);
 615         if (ret_len == 0) {
 616                 diag("[error] Remote side has closed connection");
 617                 goto error;
 618         }
 619         if (ret_len < 0) {
 620                 diag("Error receiving trace packet");
 621                 goto error;
 622         }
 623 end:
 624         return 0;
 625 error:
 626         return -1;
 627 }
 628
 629 static
 630 int detach_viewer_session(uint64_t id)
 631 {
 632         struct lttng_viewer_cmd cmd;
 633         struct lttng_viewer_detach_session_response resp;
 634         struct lttng_viewer_detach_session_request rq;
 635         int ret;
 636         ssize_t ret_len;
 637
 638         cmd.cmd = htobe32(LTTNG_VIEWER_DETACH_SESSION);
 639         cmd.data_size = htobe64(sizeof(rq));
 640         cmd.cmd_version = htobe32(0);
 641
 642         memset(&rq, 0, sizeof(rq));
 643         rq.session_id = htobe64(id);
 644
 645         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 646         if (ret_len < 0) {
 647                 fprintf(stderr, "[error] Error sending cmd\n");
 648                 ret = ret_len;
 649                 goto error;
 650         }
 651
 652         ret_len = lttng_live_send(control_sock, &rq, sizeof(rq));
 653         if (ret_len < 0) {
 654                 fprintf(stderr, "Error sending attach request\n");
 655                 ret = ret_len;
 656                 goto error;
 657         }
 658
 659         ret_len = lttng_live_recv(control_sock, &resp, sizeof(resp));
 660         if (ret_len < 0) {
 661                 fprintf(stderr, "[error] Error receiving detach session reply\n");
 662                 ret = ret_len;
 663                 goto error;
 664         }
 665
 666         if (be32toh(resp.status) != LTTNG_VIEWER_DETACH_SESSION_OK) {
 667                 fprintf(stderr, "[error] Error detaching viewer session\n");
 668                 ret = -1;
 669                 goto error;
 670         }
 671         ret = 0;
 672
 673 error:
 674         return ret;
 675 }
 676
 677 int main(int argc, char **argv)
 678 {
 679         int ret;
 680         uint64_t session_id;
 681
 682         plan_tests(NUM_TESTS);
 683
 684         diag("Live unit tests");
 685
 686         ret = connect_viewer("localhost");
 687         ok(ret == 0, "Connect viewer to relayd");
 688
 689         ret = establish_connection();
 690         ok(ret == 0, "Established connection and version check with %d.%d",
 691                         VERSION_MAJOR, VERSION_MINOR);
 692
 693         ret = list_sessions(&session_id);
 694         ok(ret > 0, "List sessions : %d session(s)", ret);
 695         if (ret < 0) {
 696                 goto end;
 697         }
 698
 699         ret = create_viewer_session();
 700         ok(ret == 0, "Create viewer session");
 701
 702         ret = attach_session(session_id);
 703         ok(ret > 0, "Attach to session, %d stream(s) received", ret);
 704
 705         ret = get_metadata();
 706         ok(ret > 0, "Get metadata, received %d bytes", ret);
 707
 708         ret = get_next_index();
 709         ok(ret == 0, "Get one index per stream");
 710
 711         ret = get_data_packet(first_packet_stream_id, first_packet_offset,
 712                         first_packet_len);
 713         ok(ret == 0,
 714                         "Get one data packet for stream %d, offset %d, len %d",
 715                         first_packet_stream_id, first_packet_offset,
 716                         first_packet_len);
 717
 718         ret = detach_viewer_session(session_id);
 719         ok(ret == 0, "Detach viewer session");
 720
 721         ret = list_sessions(&session_id);
 722         ok(ret > 0, "List sessions : %d session(s)", ret);
 723
 724         ret = attach_session(session_id);
 725         ok(ret > 0, "Attach to session, %d streams received", ret);
 726 end:
 727         return exit_status();
 728 }