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 static int control_sock;
  55 struct live_session *session;
  56
  57 static int first_packet_offset;
  58 static int first_packet_len;
  59 static int first_packet_stream_id = -1;
  60
  61 struct viewer_stream {
  62         uint64_t id;
  63         uint64_t ctf_trace_id;
  64         void *mmap_base;
  65         int fd;
  66         int metadata_flag;
  67         int first_read;
  68         char path[PATH_MAX];
  69 };
  70
  71 struct live_session {
  72         struct viewer_stream *streams;
  73         uint64_t live_timer_interval;
  74         uint64_t stream_count;
  75 };
  76
  77 static
  78 ssize_t lttng_live_recv(int fd, void *buf, size_t len)
  79 {
  80         ssize_t ret;
  81         size_t copied = 0, to_copy = len;
  82
  83         do {
  84                 ret = recv(fd, buf + copied, to_copy, 0);
  85                 if (ret > 0) {
  86                         assert(ret <= to_copy);
  87                         copied += ret;
  88                         to_copy -= ret;
  89                 }
  90         } while ((ret > 0 && to_copy > 0)
  91                 || (ret < 0 && errno == EINTR));
  92         if (ret > 0)
  93                 ret = copied;
  94         /* ret = 0 means orderly shutdown, ret < 0 is error. */
  95         return ret;
  96 }
  97
  98 static
  99 ssize_t lttng_live_send(int fd, const void *buf, size_t len)
 100 {
 101         ssize_t ret;
 102
 103         do {
 104                 ret = send(fd, buf, len, MSG_NOSIGNAL);
 105         } while (ret < 0 && errno == EINTR);
 106         return ret;
 107 }
 108
 109 static
 110 int connect_viewer(char *hostname)
 111 {
 112         struct hostent *host;
 113         struct sockaddr_in server_addr;
 114         int ret;
 115
 116         host = gethostbyname(hostname);
 117         if (!host) {
 118                 ret = -1;
 119                 goto end;
 120         }
 121
 122         if ((control_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
 123                 PERROR("Socket");
 124                 ret = -1;
 125                 goto end;
 126         }
 127
 128         server_addr.sin_family = AF_INET;
 129         server_addr.sin_port = htons(5344);
 130         server_addr.sin_addr = *((struct in_addr *) host->h_addr);
 131         bzero(&(server_addr.sin_zero), 8);
 132
 133         if (connect(control_sock, (struct sockaddr *) &server_addr,
 134                                 sizeof(struct sockaddr)) == -1) {
 135                 PERROR("Connect");
 136                 ret = -1;
 137                 goto end;
 138         }
 139
 140         server_addr.sin_family = AF_INET;
 141         server_addr.sin_port = htons(5345);
 142         server_addr.sin_addr = *((struct in_addr *) host->h_addr);
 143         bzero(&(server_addr.sin_zero), 8);
 144
 145         ret = 0;
 146
 147 end:
 148         return ret;
 149 }
 150
 151 int establish_connection(void)
 152 {
 153         struct lttng_viewer_cmd cmd;
 154         struct lttng_viewer_connect connect;
 155         ssize_t ret_len;
 156
 157         cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT);
 158         cmd.data_size = htobe64(sizeof(connect));
 159         cmd.cmd_version = htobe32(0);
 160
 161         memset(&connect, 0, sizeof(connect));
 162         connect.major = htobe32(VERSION_MAJOR);
 163         connect.minor = htobe32(VERSION_MINOR);
 164         connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND);
 165
 166         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 167         if (ret_len < 0) {
 168                 diag("Error sending cmd");
 169                 goto error;
 170         }
 171         ret_len = lttng_live_send(control_sock, &connect, sizeof(connect));
 172         if (ret_len < 0) {
 173                 diag("Error sending version");
 174                 goto error;
 175         }
 176
 177         ret_len = lttng_live_recv(control_sock, &connect, sizeof(connect));
 178         if (ret_len == 0) {
 179                 diag("[error] Remote side has closed connection");
 180                 goto error;
 181         }
 182         if (ret_len < 0) {
 183                 diag("Error receiving version");
 184                 goto error;
 185         }
 186         return 0;
 187
 188 error:
 189         return -1;
 190 }
 191
 192 /*
 193  * Returns the number of sessions, should be 1 during the unit test.
 194  */
 195 int list_sessions(uint64_t *session_id)
 196 {
 197         struct lttng_viewer_cmd cmd;
 198         struct lttng_viewer_list_sessions list;
 199         struct lttng_viewer_session lsession;
 200         int i;
 201         ssize_t ret_len;
 202         int first_session = 0;
 203
 204         cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS);
 205         cmd.data_size = htobe64(0);
 206         cmd.cmd_version = htobe32(0);
 207
 208         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 209         if (ret_len < 0) {
 210                 diag("Error sending cmd");
 211                 goto error;
 212         }
 213
 214         ret_len = lttng_live_recv(control_sock, &list, sizeof(list));
 215         if (ret_len == 0) {
 216                 diag("[error] Remote side has closed connection");
 217                 goto error;
 218         }
 219         if (ret_len < 0) {
 220                 diag("Error receiving session list");
 221                 goto error;
 222         }
 223
 224         for (i = 0; i < be32toh(list.sessions_count); i++) {
 225                 ret_len = lttng_live_recv(control_sock, &lsession, sizeof(lsession));
 226                 if (ret_len < 0) {
 227                         diag("Error receiving session");
 228                         goto error;
 229                 }
 230                 if (lsession.streams > 0 && first_session <= 0) {
 231                         first_session = be64toh(lsession.id);
 232                         *session_id = first_session;
 233                 }
 234         }
 235
 236         return be32toh(list.sessions_count);
 237
 238 error:
 239         return -1;
 240 }
 241
 242 int create_viewer_session(void)
 243 {
 244         struct lttng_viewer_cmd cmd;
 245         struct lttng_viewer_create_session_response resp;
 246         ssize_t ret_len;
 247
 248         cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION);
 249         cmd.data_size = htobe64(0);
 250         cmd.cmd_version = htobe32(0);
 251
 252         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 253         if (ret_len < 0) {
 254                 diag("[error] Error sending cmd");
 255                 goto error;
 256         }
 257         assert(ret_len == sizeof(cmd));
 258
 259         ret_len = lttng_live_recv(control_sock, &resp, sizeof(resp));
 260         if (ret_len == 0) {
 261                 diag("[error] Remote side has closed connection");
 262                 goto error;
 263         }
 264         if (ret_len < 0) {
 265                 diag("[error] Error receiving create session reply");
 266                 goto error;
 267         }
 268         assert(ret_len == sizeof(resp));
 269
 270         if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) {
 271                 diag("[error] Error creating viewer session");
 272                 goto error;
 273         }
 274         return 0;
 275
 276 error:
 277         return -1;
 278 }
 279
 280 int attach_session(uint64_t id)
 281 {
 282         struct lttng_viewer_cmd cmd;
 283         struct lttng_viewer_attach_session_request rq;
 284         struct lttng_viewer_attach_session_response rp;
 285         struct lttng_viewer_stream stream;
 286         int i;
 287         ssize_t ret_len;
 288
 289         session = zmalloc(sizeof(struct live_session));
 290         if (!session) {
 291                 goto error;
 292         }
 293
 294         cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION);
 295         cmd.data_size = htobe64(sizeof(rq));
 296         cmd.cmd_version = htobe32(0);
 297
 298         memset(&rq, 0, sizeof(rq));
 299         rq.session_id = htobe64(id);
 300         rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING);
 301
 302         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 303         if (ret_len < 0) {
 304                 diag("Error sending cmd LTTNG_VIEWER_ATTACH_SESSION");
 305                 goto error;
 306         }
 307         ret_len = lttng_live_send(control_sock, &rq, sizeof(rq));
 308         if (ret_len < 0) {
 309                 diag("Error sending attach request");
 310                 goto error;
 311         }
 312
 313         ret_len = lttng_live_recv(control_sock, &rp, sizeof(rp));
 314         if (ret_len == 0) {
 315                 diag("[error] Remote side has closed connection");
 316                 goto error;
 317         }
 318         if (ret_len < 0) {
 319                 diag("Error receiving attach response");
 320                 goto error;
 321         }
 322         if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) {
 323                 goto error;
 324         }
 325
 326         session->stream_count = be32toh(rp.streams_count);
 327         if (session->stream_count == 0) {
 328                 diag("Got session stream count == 0");
 329                 goto error;
 330         }
 331         session->streams = zmalloc(session->stream_count *
 332                         sizeof(struct viewer_stream));
 333         if (!session->streams) {
 334                 goto error;
 335         }
 336
 337         for (i = 0; i < be32toh(rp.streams_count); i++) {
 338                 ret_len = lttng_live_recv(control_sock, &stream, sizeof(stream));
 339                 if (ret_len == 0) {
 340                         diag("[error] Remote side has closed connection");
 341                         goto error;
 342                 }
 343                 if (ret_len < 0) {
 344                         diag("Error receiving stream");
 345                         goto error;
 346                 }
 347                 session->streams[i].id = be64toh(stream.id);
 348
 349                 session->streams[i].ctf_trace_id = be64toh(stream.ctf_trace_id);
 350                 session->streams[i].first_read = 1;
 351                 session->streams[i].mmap_base = mmap(NULL, mmap_size,
 352                                 PROT_READ | PROT_WRITE,
 353                                 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
 354                 if (session->streams[i].mmap_base == MAP_FAILED) {
 355                         diag("mmap error");
 356                         goto error;
 357                 }
 358
 359                 if (be32toh(stream.metadata_flag)) {
 360                         session->streams[i].metadata_flag = 1;
 361                 }
 362         }
 363         return session->stream_count;
 364
 365 error:
 366         return -1;
 367 }
 368
 369 int get_metadata(void)
 370 {
 371         struct lttng_viewer_cmd cmd;
 372         struct lttng_viewer_get_metadata rq;
 373         struct lttng_viewer_metadata_packet rp;
 374         ssize_t ret_len;
 375         int ret;
 376         uint64_t i;
 377         char *data = NULL;
 378         uint64_t len = 0;
 379         int metadata_stream_id = -1;
 380
 381         cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA);
 382         cmd.data_size = htobe64(sizeof(rq));
 383         cmd.cmd_version = htobe32(0);
 384
 385         for (i = 0; i < session->stream_count; i++) {
 386                 if (session->streams[i].metadata_flag) {
 387                         metadata_stream_id = i;
 388                         break;
 389                 }
 390         }
 391
 392         if (metadata_stream_id < 0) {
 393                 diag("No metadata stream found");
 394                 goto error;
 395         }
 396
 397         rq.stream_id = htobe64(session->streams[metadata_stream_id].id);
 398
 399 retry:
 400         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 401         if (ret_len < 0) {
 402                 diag("Error sending cmd");
 403                 goto error;
 404         }
 405         ret_len = lttng_live_send(control_sock, &rq, sizeof(rq));
 406         if (ret_len < 0) {
 407                 diag("Error sending get_metadata request");
 408                 goto error;
 409         }
 410         ret_len = lttng_live_recv(control_sock, &rp, sizeof(rp));
 411         if (ret_len == 0) {
 412                 diag("[error] Remote side has closed connection");
 413                 goto error;
 414         }
 415         if (ret_len < 0) {
 416                 diag("Error receiving metadata response");
 417                 goto error;
 418         }
 419         switch (be32toh(rp.status)) {
 420         case LTTNG_VIEWER_METADATA_OK:
 421                 break;
 422         case LTTNG_VIEWER_NO_NEW_METADATA:
 423                 diag("Got LTTNG_VIEWER_NO_NEW_METADATA:");
 424                 usleep(50);
 425                 goto retry;
 426         case LTTNG_VIEWER_METADATA_ERR:
 427                 diag("Got LTTNG_VIEWER_METADATA_ERR:");
 428                 goto error;
 429         default:
 430                 diag("Got unknown status during LTTNG_VIEWER_GET_METADATA");
 431                 goto error;
 432         }
 433
 434         len = be64toh(rp.len);
 435         if (len <= 0) {
 436                 goto error;
 437         }
 438
 439         data = zmalloc(len);
 440         if (!data) {
 441                 PERROR("relay data zmalloc");
 442                 goto error;
 443         }
 444         ret_len = lttng_live_recv(control_sock, data, len);
 445         if (ret_len == 0) {
 446                 diag("[error] Remote side has closed connection");
 447                 goto error_free_data;
 448         }
 449         if (ret_len < 0) {
 450                 diag("Error receiving trace packet");
 451                 goto error_free_data;
 452         }
 453         free(data);
 454         ret = len;
 455
 456         return ret;
 457
 458 error_free_data:
 459         free(data);
 460 error:
 461         return -1;
 462 }
 463
 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 int detach_viewer_session(uint64_t id)
 630 {
 631         struct lttng_viewer_cmd cmd;
 632         struct lttng_viewer_detach_session_response resp;
 633         struct lttng_viewer_detach_session_request rq;
 634         int ret;
 635         ssize_t ret_len;
 636
 637         cmd.cmd = htobe32(LTTNG_VIEWER_DETACH_SESSION);
 638         cmd.data_size = htobe64(sizeof(rq));
 639         cmd.cmd_version = htobe32(0);
 640
 641         memset(&rq, 0, sizeof(rq));
 642         rq.session_id = htobe64(id);
 643
 644         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 645         if (ret_len < 0) {
 646                 fprintf(stderr, "[error] Error sending cmd\n");
 647                 ret = ret_len;
 648                 goto error;
 649         }
 650
 651         ret_len = lttng_live_send(control_sock, &rq, sizeof(rq));
 652         if (ret_len < 0) {
 653                 fprintf(stderr, "Error sending attach request\n");
 654                 ret = ret_len;
 655                 goto error;
 656         }
 657
 658         ret_len = lttng_live_recv(control_sock, &resp, sizeof(resp));
 659         if (ret_len < 0) {
 660                 fprintf(stderr, "[error] Error receiving detach session reply\n");
 661                 ret = ret_len;
 662                 goto error;
 663         }
 664
 665         if (be32toh(resp.status) != LTTNG_VIEWER_DETACH_SESSION_OK) {
 666                 fprintf(stderr, "[error] Error detaching viewer session\n");
 667                 ret = -1;
 668                 goto error;
 669         }
 670         ret = 0;
 671
 672 error:
 673         return ret;
 674 }
 675
 676 int main(int argc, char **argv)
 677 {
 678         int ret;
 679         uint64_t session_id;
 680
 681         plan_tests(NUM_TESTS);
 682
 683         diag("Live unit tests");
 684
 685         ret = connect_viewer("localhost");
 686         ok(ret == 0, "Connect viewer to relayd");
 687
 688         ret = establish_connection();
 689         ok(ret == 0, "Established connection and version check with %d.%d",
 690                         VERSION_MAJOR, VERSION_MINOR);
 691
 692         ret = list_sessions(&session_id);
 693         ok(ret > 0, "List sessions : %d session(s)", ret);
 694         if (ret < 0) {
 695                 goto end;
 696         }
 697
 698         ret = create_viewer_session();
 699         ok(ret == 0, "Create viewer session");
 700
 701         ret = attach_session(session_id);
 702         ok(ret > 0, "Attach to session, %d stream(s) received", ret);
 703
 704         ret = get_metadata();
 705         ok(ret > 0, "Get metadata, received %d bytes", ret);
 706
 707         ret = get_next_index();
 708         ok(ret == 0, "Get one index per stream");
 709
 710         ret = get_data_packet(first_packet_stream_id, first_packet_offset,
 711                         first_packet_len);
 712         ok(ret == 0,
 713                         "Get one data packet for stream %d, offset %d, len %d",
 714                         first_packet_stream_id, first_packet_offset,
 715                         first_packet_len);
 716
 717         ret = detach_viewer_session(session_id);
 718         ok(ret == 0, "Detach viewer session");
 719
 720         ret = list_sessions(&session_id);
 721         ok(ret > 0, "List sessions : %d session(s)", ret);
 722
 723         ret = attach_session(session_id);
 724         ok(ret > 0, "Attach to session, %d streams received", ret);
 725 end:
 726         return exit_status();
 727 }