tests/regression/tools/live/live_test.c

   1 /*
   2  * Copyright (c) - 2013 Julien Desfossez <jdesfossez@efficios.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License as published by as
   6  * published by the Free Software Foundation; only version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with
  14  * this program; if not, write to the Free Software Foundation, Inc., 51
  15  * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  16  */
  17
  18 #include <assert.h>
  19 #include <errno.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24 #include <common/compat/time.h>
  25 #include <sys/types.h>
  26 #include <inttypes.h>
  27 #include <stdlib.h>
  28 #include <sys/socket.h>
  29 #include <netinet/in.h>
  30 #include <netdb.h>
  31 #include <fcntl.h>
  32 #include <sys/mman.h>
  33 #include <sys/stat.h>
  34
  35 #include <tap/tap.h>
  36 #include <lttng/lttng.h>
  37
  38 #include <urcu/list.h>
  39 #include <common/common.h>
  40
  41 #include <bin/lttng-relayd/lttng-viewer-abi.h>
  42 #include <common/index/ctf-index.h>
  43
  44 #include <common/compat/endian.h>
  45
  46 #define SESSION1 "test1"
  47 #define RELAYD_URL "net://localhost"
  48 #define LIVE_TIMER 2000000
  49
  50 /* Number of TAP tests in this file */
  51 #define NUM_TESTS 11
  52 #define mmap_size 524288
  53
  54 int ust_consumerd32_fd;
  55 int ust_consumerd64_fd;
  56
  57 static int control_sock;
  58 struct live_session *session;
  59
  60 static int first_packet_offset;
  61 static int first_packet_len;
  62 static int first_packet_stream_id = -1;
  63
  64 struct viewer_stream {
  65         uint64_t id;
  66         uint64_t ctf_trace_id;
  67         void *mmap_base;
  68         int fd;
  69         int metadata_flag;
  70         int first_read;
  71         char path[PATH_MAX];
  72 };
  73
  74 struct live_session {
  75         struct viewer_stream *streams;
  76         uint64_t live_timer_interval;
  77         uint64_t stream_count;
  78 };
  79
  80 static
  81 ssize_t lttng_live_recv(int fd, void *buf, size_t len)
  82 {
  83         ssize_t ret;
  84         size_t copied = 0, to_copy = len;
  85
  86         do {
  87                 ret = recv(fd, buf + copied, to_copy, 0);
  88                 if (ret > 0) {
  89                         assert(ret <= to_copy);
  90                         copied += ret;
  91                         to_copy -= ret;
  92                 }
  93         } while ((ret > 0 && to_copy > 0)
  94                 || (ret < 0 && errno == EINTR));
  95         if (ret > 0)
  96                 ret = copied;
  97         /* ret = 0 means orderly shutdown, ret < 0 is error. */
  98         return ret;
  99 }
 100
 101 static
 102 ssize_t lttng_live_send(int fd, const void *buf, size_t len)
 103 {
 104         ssize_t ret;
 105
 106         do {
 107                 ret = send(fd, buf, len, MSG_NOSIGNAL);
 108         } while (ret < 0 && errno == EINTR);
 109         return ret;
 110 }
 111
 112 static
 113 int connect_viewer(char *hostname)
 114 {
 115         struct hostent *host;
 116         struct sockaddr_in server_addr;
 117         int ret;
 118
 119         host = gethostbyname(hostname);
 120         if (!host) {
 121                 ret = -1;
 122                 goto end;
 123         }
 124
 125         if ((control_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
 126                 PERROR("Socket");
 127                 ret = -1;
 128                 goto end;
 129         }
 130
 131         server_addr.sin_family = AF_INET;
 132         server_addr.sin_port = htons(5344);
 133         server_addr.sin_addr = *((struct in_addr *) host->h_addr);
 134         bzero(&(server_addr.sin_zero), 8);
 135
 136         if (connect(control_sock, (struct sockaddr *) &server_addr,
 137                                 sizeof(struct sockaddr)) == -1) {
 138                 PERROR("Connect");
 139                 ret = -1;
 140                 goto end;
 141         }
 142
 143         server_addr.sin_family = AF_INET;
 144         server_addr.sin_port = htons(5345);
 145         server_addr.sin_addr = *((struct in_addr *) host->h_addr);
 146         bzero(&(server_addr.sin_zero), 8);
 147
 148         ret = 0;
 149
 150 end:
 151         return ret;
 152 }
 153
 154 int establish_connection(void)
 155 {
 156         struct lttng_viewer_cmd cmd;
 157         struct lttng_viewer_connect connect;
 158         ssize_t ret_len;
 159
 160         cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT);
 161         cmd.data_size = htobe64(sizeof(connect));
 162         cmd.cmd_version = htobe32(0);
 163
 164         memset(&connect, 0, sizeof(connect));
 165         connect.major = htobe32(VERSION_MAJOR);
 166         connect.minor = htobe32(VERSION_MINOR);
 167         connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND);
 168
 169         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 170         if (ret_len < 0) {
 171                 diag("Error sending cmd");
 172                 goto error;
 173         }
 174         ret_len = lttng_live_send(control_sock, &connect, sizeof(connect));
 175         if (ret_len < 0) {
 176                 diag("Error sending version");
 177                 goto error;
 178         }
 179
 180         ret_len = lttng_live_recv(control_sock, &connect, sizeof(connect));
 181         if (ret_len == 0) {
 182                 diag("[error] Remote side has closed connection");
 183                 goto error;
 184         }
 185         if (ret_len < 0) {
 186                 diag("Error receiving version");
 187                 goto error;
 188         }
 189         return 0;
 190
 191 error:
 192         return -1;
 193 }
 194
 195 /*
 196  * Returns the number of sessions, should be 1 during the unit test.
 197  */
 198 int list_sessions(uint64_t *session_id)
 199 {
 200         struct lttng_viewer_cmd cmd;
 201         struct lttng_viewer_list_sessions list;
 202         struct lttng_viewer_session lsession;
 203         int i;
 204         ssize_t ret_len;
 205         int first_session = 0;
 206
 207         cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS);
 208         cmd.data_size = htobe64(0);
 209         cmd.cmd_version = htobe32(0);
 210
 211         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 212         if (ret_len < 0) {
 213                 diag("Error sending cmd");
 214                 goto error;
 215         }
 216
 217         ret_len = lttng_live_recv(control_sock, &list, sizeof(list));
 218         if (ret_len == 0) {
 219                 diag("[error] Remote side has closed connection");
 220                 goto error;
 221         }
 222         if (ret_len < 0) {
 223                 diag("Error receiving session list");
 224                 goto error;
 225         }
 226
 227         for (i = 0; i < be32toh(list.sessions_count); i++) {
 228                 ret_len = lttng_live_recv(control_sock, &lsession, sizeof(lsession));
 229                 if (ret_len < 0) {
 230                         diag("Error receiving session");
 231                         goto error;
 232                 }
 233                 if (lsession.streams > 0 && first_session <= 0) {
 234                         first_session = be64toh(lsession.id);
 235                         *session_id = first_session;
 236                 }
 237         }
 238
 239         return be32toh(list.sessions_count);
 240
 241 error:
 242         return -1;
 243 }
 244
 245 int create_viewer_session(void)
 246 {
 247         struct lttng_viewer_cmd cmd;
 248         struct lttng_viewer_create_session_response resp;
 249         ssize_t ret_len;
 250
 251         cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION);
 252         cmd.data_size = htobe64(0);
 253         cmd.cmd_version = htobe32(0);
 254
 255         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 256         if (ret_len < 0) {
 257                 diag("[error] Error sending cmd");
 258                 goto error;
 259         }
 260         assert(ret_len == sizeof(cmd));
 261
 262         ret_len = lttng_live_recv(control_sock, &resp, sizeof(resp));
 263         if (ret_len == 0) {
 264                 diag("[error] Remote side has closed connection");
 265                 goto error;
 266         }
 267         if (ret_len < 0) {
 268                 diag("[error] Error receiving create session reply");
 269                 goto error;
 270         }
 271         assert(ret_len == sizeof(resp));
 272
 273         if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) {
 274                 diag("[error] Error creating viewer session");
 275                 goto error;
 276         }
 277         return 0;
 278
 279 error:
 280         return -1;
 281 }
 282
 283 int attach_session(uint64_t id)
 284 {
 285         struct lttng_viewer_cmd cmd;
 286         struct lttng_viewer_attach_session_request rq;
 287         struct lttng_viewer_attach_session_response rp;
 288         struct lttng_viewer_stream stream;
 289         int i;
 290         ssize_t ret_len;
 291
 292         session = zmalloc(sizeof(struct live_session));
 293         if (!session) {
 294                 goto error;
 295         }
 296
 297         cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION);
 298         cmd.data_size = htobe64(sizeof(rq));
 299         cmd.cmd_version = htobe32(0);
 300
 301         memset(&rq, 0, sizeof(rq));
 302         rq.session_id = htobe64(id);
 303         rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING);
 304
 305         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 306         if (ret_len < 0) {
 307                 diag("Error sending cmd LTTNG_VIEWER_ATTACH_SESSION");
 308                 goto error;
 309         }
 310         ret_len = lttng_live_send(control_sock, &rq, sizeof(rq));
 311         if (ret_len < 0) {
 312                 diag("Error sending attach request");
 313                 goto error;
 314         }
 315
 316         ret_len = lttng_live_recv(control_sock, &rp, sizeof(rp));
 317         if (ret_len == 0) {
 318                 diag("[error] Remote side has closed connection");
 319                 goto error;
 320         }
 321         if (ret_len < 0) {
 322                 diag("Error receiving attach response");
 323                 goto error;
 324         }
 325         if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) {
 326                 goto error;
 327         }
 328
 329         session->stream_count = be32toh(rp.streams_count);
 330         if (session->stream_count == 0) {
 331                 diag("Got session stream count == 0");
 332                 goto error;
 333         }
 334         session->streams = zmalloc(session->stream_count *
 335                         sizeof(struct viewer_stream));
 336         if (!session->streams) {
 337                 goto error;
 338         }
 339
 340         for (i = 0; i < be32toh(rp.streams_count); i++) {
 341                 ret_len = lttng_live_recv(control_sock, &stream, sizeof(stream));
 342                 if (ret_len == 0) {
 343                         diag("[error] Remote side has closed connection");
 344                         goto error;
 345                 }
 346                 if (ret_len < 0) {
 347                         diag("Error receiving stream");
 348                         goto error;
 349                 }
 350                 session->streams[i].id = be64toh(stream.id);
 351
 352                 session->streams[i].ctf_trace_id = be64toh(stream.ctf_trace_id);
 353                 session->streams[i].first_read = 1;
 354                 session->streams[i].mmap_base = mmap(NULL, mmap_size,
 355                                 PROT_READ | PROT_WRITE,
 356                                 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
 357                 if (session->streams[i].mmap_base == MAP_FAILED) {
 358                         diag("mmap error");
 359                         goto error;
 360                 }
 361
 362                 if (be32toh(stream.metadata_flag)) {
 363                         session->streams[i].metadata_flag = 1;
 364                 }
 365         }
 366         return session->stream_count;
 367
 368 error:
 369         return -1;
 370 }
 371
 372 int get_metadata(void)
 373 {
 374         struct lttng_viewer_cmd cmd;
 375         struct lttng_viewer_get_metadata rq;
 376         struct lttng_viewer_metadata_packet rp;
 377         ssize_t ret_len;
 378         int ret;
 379         uint64_t i;
 380         char *data = NULL;
 381         uint64_t len = 0;
 382         int metadata_stream_id = -1;
 383
 384         cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA);
 385         cmd.data_size = htobe64(sizeof(rq));
 386         cmd.cmd_version = htobe32(0);
 387
 388         for (i = 0; i < session->stream_count; i++) {
 389                 if (session->streams[i].metadata_flag) {
 390                         metadata_stream_id = i;
 391                         break;
 392                 }
 393         }
 394
 395         if (metadata_stream_id < 0) {
 396                 diag("No metadata stream found");
 397                 goto error;
 398         }
 399
 400         rq.stream_id = htobe64(session->streams[metadata_stream_id].id);
 401
 402         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 403         if (ret_len < 0) {
 404                 diag("Error sending cmd");
 405                 goto error;
 406         }
 407         ret_len = lttng_live_send(control_sock, &rq, sizeof(rq));
 408         if (ret_len < 0) {
 409                 diag("Error sending get_metadata request");
 410                 goto error;
 411         }
 412         ret_len = lttng_live_recv(control_sock, &rp, sizeof(rp));
 413         if (ret_len == 0) {
 414                 diag("[error] Remote side has closed connection");
 415                 goto error;
 416         }
 417         if (ret_len < 0) {
 418                 diag("Error receiving metadata response");
 419                 goto error;
 420         }
 421         switch (be32toh(rp.status)) {
 422         case LTTNG_VIEWER_METADATA_OK:
 423                 break;
 424         case LTTNG_VIEWER_NO_NEW_METADATA:
 425                 diag("Got LTTNG_VIEWER_NO_NEW_METADATA:");
 426                 ret = 0;
 427                 goto end;
 428         case LTTNG_VIEWER_METADATA_ERR:
 429                 diag("Got LTTNG_VIEWER_METADATA_ERR:");
 430                 goto error;
 431         default:
 432                 diag("Got unknown status during LTTNG_VIEWER_GET_METADATA");
 433                 goto error;
 434         }
 435
 436         len = be64toh(rp.len);
 437         if (len <= 0) {
 438                 goto error;
 439         }
 440
 441         data = zmalloc(len);
 442         if (!data) {
 443                 PERROR("relay data zmalloc");
 444                 goto error;
 445         }
 446         ret_len = lttng_live_recv(control_sock, data, len);
 447         if (ret_len == 0) {
 448                 diag("[error] Remote side has closed connection");
 449                 goto error_free_data;
 450         }
 451         if (ret_len < 0) {
 452                 diag("Error receiving trace packet");
 453                 goto error_free_data;
 454         }
 455         free(data);
 456         ret = len;
 457 end:
 458         return ret;
 459
 460 error_free_data:
 461         free(data);
 462 error:
 463         return -1;
 464 }
 465
 466 int get_next_index(void)
 467 {
 468         struct lttng_viewer_cmd cmd;
 469         struct lttng_viewer_get_next_index rq;
 470         struct lttng_viewer_index rp;
 471         ssize_t ret_len;
 472         int id;
 473
 474         cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX);
 475         cmd.data_size = htobe64(sizeof(rq));
 476         cmd.cmd_version = htobe32(0);
 477
 478         for (id = 0; id < session->stream_count; id++) {
 479                 if (session->streams[id].metadata_flag) {
 480                         continue;
 481                 }
 482                 memset(&rq, 0, sizeof(rq));
 483                 rq.stream_id = htobe64(session->streams[id].id);
 484
 485 retry:
 486                 ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 487                 if (ret_len < 0) {
 488                         diag("Error sending cmd");
 489                         goto error;
 490                 }
 491                 ret_len = lttng_live_send(control_sock, &rq, sizeof(rq));
 492                 if (ret_len < 0) {
 493                         diag("Error sending get_next_index request");
 494                         goto error;
 495                 }
 496                 ret_len = lttng_live_recv(control_sock, &rp, sizeof(rp));
 497                 if (ret_len == 0) {
 498                         diag("[error] Remote side has closed connection");
 499                         goto error;
 500                 }
 501                 if (ret_len < 0) {
 502                         diag("Error receiving index response");
 503                         goto error;
 504                 }
 505
 506                 rp.flags = be32toh(rp.flags);
 507
 508                 switch (be32toh(rp.status)) {
 509                 case LTTNG_VIEWER_INDEX_INACTIVE:
 510                         /* Skip this stream. */
 511                         diag("Got LTTNG_VIEWER_INDEX_INACTIVE");
 512                         continue;
 513                 case LTTNG_VIEWER_INDEX_OK:
 514                         break;
 515                 case LTTNG_VIEWER_INDEX_RETRY:
 516                         sleep(1);
 517                         goto retry;
 518                 case LTTNG_VIEWER_INDEX_HUP:
 519                         diag("Got LTTNG_VIEWER_INDEX_HUP");
 520                         session->streams[id].id = -1ULL;
 521                         session->streams[id].fd = -1;
 522                         goto error;
 523                 case LTTNG_VIEWER_INDEX_ERR:
 524                         diag("Got LTTNG_VIEWER_INDEX_ERR");
 525                         goto error;
 526                 default:
 527                         diag("Unknown reply status during LTTNG_VIEWER_GET_NEXT_INDEX (%d)", be32toh(rp.status));
 528                         goto error;
 529                 }
 530                 if (first_packet_stream_id < 0) {
 531                         /*
 532                          * Initialize the first packet stream id. That is,
 533                          * the first active stream encoutered.
 534                          */
 535                         first_packet_offset = be64toh(rp.offset);
 536                         first_packet_len = be64toh(rp.packet_size) / CHAR_BIT;
 537                         first_packet_stream_id = id;
 538                         diag("Got first packet index with offset %d and len %d",
 539                                         first_packet_offset, first_packet_len);
 540                 }
 541         }
 542         return 0;
 543
 544 error:
 545         return -1;
 546 }
 547
 548 static
 549 int get_data_packet(int id, uint64_t offset,
 550                 uint64_t len)
 551 {
 552         struct lttng_viewer_cmd cmd;
 553         struct lttng_viewer_get_packet rq;
 554         struct lttng_viewer_trace_packet rp;
 555         ssize_t ret_len;
 556
 557         cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET);
 558         cmd.data_size = htobe64(sizeof(rq));
 559         cmd.cmd_version = htobe32(0);
 560
 561         memset(&rq, 0, sizeof(rq));
 562         rq.stream_id = htobe64(session->streams[id].id);
 563         /* Already in big endian. */
 564         rq.offset = offset;
 565         rq.len = htobe32(len);
 566
 567         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 568         if (ret_len < 0) {
 569                 diag("Error sending cmd");
 570                 goto error;
 571         }
 572         ret_len = lttng_live_send(control_sock, &rq, sizeof(rq));
 573         if (ret_len < 0) {
 574                 diag("Error sending get_data_packet request");
 575                 goto error;
 576         }
 577         ret_len = lttng_live_recv(control_sock, &rp, sizeof(rp));
 578         if (ret_len == 0) {
 579                 diag("[error] Remote side has closed connection");
 580                 goto error;
 581         }
 582         if (ret_len < 0) {
 583                 diag("Error receiving data response");
 584                 goto error;
 585         }
 586         rp.flags = be32toh(rp.flags);
 587
 588         switch (be32toh(rp.status)) {
 589         case LTTNG_VIEWER_GET_PACKET_OK:
 590                 len = be32toh(rp.len);
 591                 if (len == 0) {
 592                         diag("Got LTTNG_VIEWER_GET_PACKET_OK, but len == 0");
 593                         goto error;
 594                 }
 595                 break;
 596         case LTTNG_VIEWER_GET_PACKET_RETRY:
 597                 diag("Got LTTNG_VIEWER_GET_PACKET_RETRY:");
 598                 goto error;
 599         case LTTNG_VIEWER_GET_PACKET_ERR:
 600                 if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) {
 601                         diag("Got LTTNG_VIEWER_GET_PACKET_ERR with NEW_METADATA flag");
 602                         goto end;
 603                 }
 604                 diag("Got LTTNG_VIEWER_GET_PACKET_ERR:");
 605                 goto error;
 606         default:
 607                 diag("Got unknown status code during LTTNG_VIEWER_GET_PACKET");
 608                 goto error;
 609         }
 610
 611         if (len > mmap_size) {
 612                 diag("mmap_size not big enough");
 613                 goto error;
 614         }
 615
 616         ret_len = lttng_live_recv(control_sock, session->streams[id].mmap_base, len);
 617         if (ret_len == 0) {
 618                 diag("[error] Remote side has closed connection");
 619                 goto error;
 620         }
 621         if (ret_len < 0) {
 622                 diag("Error receiving trace packet");
 623                 goto error;
 624         }
 625 end:
 626         return 0;
 627 error:
 628         return -1;
 629 }
 630
 631 int detach_viewer_session(uint64_t id)
 632 {
 633         struct lttng_viewer_cmd cmd;
 634         struct lttng_viewer_detach_session_response resp;
 635         struct lttng_viewer_detach_session_request rq;
 636         int ret;
 637         ssize_t ret_len;
 638
 639         cmd.cmd = htobe32(LTTNG_VIEWER_DETACH_SESSION);
 640         cmd.data_size = htobe64(sizeof(rq));
 641         cmd.cmd_version = htobe32(0);
 642
 643         memset(&rq, 0, sizeof(rq));
 644         rq.session_id = htobe64(id);
 645
 646         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 647         if (ret_len < 0) {
 648                 fprintf(stderr, "[error] Error sending cmd\n");
 649                 ret = ret_len;
 650                 goto error;
 651         }
 652
 653         ret_len = lttng_live_send(control_sock, &rq, sizeof(rq));
 654         if (ret_len < 0) {
 655                 fprintf(stderr, "Error sending attach request\n");
 656                 ret = ret_len;
 657                 goto error;
 658         }
 659
 660         ret_len = lttng_live_recv(control_sock, &resp, sizeof(resp));
 661         if (ret_len < 0) {
 662                 fprintf(stderr, "[error] Error receiving detach session reply\n");
 663                 ret = ret_len;
 664                 goto error;
 665         }
 666
 667         if (be32toh(resp.status) != LTTNG_VIEWER_DETACH_SESSION_OK) {
 668                 fprintf(stderr, "[error] Error detaching viewer session\n");
 669                 ret = -1;
 670                 goto error;
 671         }
 672         ret = 0;
 673
 674 error:
 675         return ret;
 676 }
 677
 678 int main(int argc, char **argv)
 679 {
 680         int ret;
 681         uint64_t session_id;
 682
 683         plan_tests(NUM_TESTS);
 684
 685         diag("Live unit tests");
 686
 687         ret = connect_viewer("localhost");
 688         ok(ret == 0, "Connect viewer to relayd");
 689
 690         ret = establish_connection();
 691         ok(ret == 0, "Established connection and version check with %d.%d",
 692                         VERSION_MAJOR, VERSION_MINOR);
 693
 694         ret = list_sessions(&session_id);
 695         ok(ret > 0, "List sessions : %d session(s)", ret);
 696
 697         ret = create_viewer_session();
 698         ok(ret == 0, "Create viewer session");
 699
 700         ret = attach_session(session_id);
 701         ok(ret > 0, "Attach to session, %d stream(s) received", ret);
 702
 703         ret = get_metadata();
 704         ok(ret > 0, "Get metadata, received %d bytes", ret);
 705
 706         ret = get_next_index();
 707         ok(ret == 0, "Get one index per stream");
 708
 709         ret = get_data_packet(first_packet_stream_id, first_packet_offset,
 710                         first_packet_len);
 711         ok(ret == 0,
 712                         "Get one data packet for stream %d, offset %d, len %d",
 713                         first_packet_stream_id, first_packet_offset,
 714                         first_packet_len);
 715
 716         ret = detach_viewer_session(session_id);
 717         ok(ret == 0, "Detach viewer session");
 718
 719         ret = list_sessions(&session_id);
 720         ok(ret > 0, "List sessions : %d session(s)", ret);
 721
 722         ret = attach_session(session_id);
 723         ok(ret > 0, "Attach to session, %d streams received", ret);
 724
 725         return exit_status();
 726 }