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 <assert.h>
   9 #include <errno.h>
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <unistd.h>
  14 #include <common/compat/time.h>
  15 #include <sys/types.h>
  16 #include <inttypes.h>
  17 #include <stdlib.h>
  18 #include <sys/socket.h>
  19 #include <netinet/in.h>
  20 #include <netdb.h>
  21 #include <fcntl.h>
  22 #include <sys/mman.h>
  23 #include <sys/stat.h>
  24
  25 #include <tap/tap.h>
  26 #include <lttng/lttng.h>
  27
  28 #include <urcu/list.h>
  29 #include <common/common.h>
  30
  31 #include <bin/lttng-relayd/lttng-viewer-abi.h>
  32 #include <common/index/ctf-index.h>
  33
  34 #include <common/compat/endian.h>
  35
  36 #define SESSION1 "test1"
  37 #define RELAYD_URL "net://localhost"
  38 #define LIVE_TIMER 2000000
  39
  40 /* Number of TAP tests in this file */
  41 #define NUM_TESTS 11
  42 #define mmap_size 524288
  43
  44 static int control_sock;
  45 struct live_session *session;
  46
  47 static int first_packet_offset;
  48 static int first_packet_len;
  49 static int first_packet_stream_id = -1;
  50
  51 struct viewer_stream {
  52         uint64_t id;
  53         uint64_t ctf_trace_id;
  54         void *mmap_base;
  55         int fd;
  56         int metadata_flag;
  57         int first_read;
  58         char path[PATH_MAX];
  59 };
  60
  61 struct live_session {
  62         struct viewer_stream *streams;
  63         uint64_t live_timer_interval;
  64         uint64_t stream_count;
  65 };
  66
  67 static
  68 ssize_t lttng_live_recv(int fd, void *buf, size_t len)
  69 {
  70         ssize_t ret;
  71         size_t copied = 0, to_copy = len;
  72
  73         do {
  74                 ret = recv(fd, buf + copied, to_copy, 0);
  75                 if (ret > 0) {
  76                         assert(ret <= to_copy);
  77                         copied += ret;
  78                         to_copy -= ret;
  79                 }
  80         } while ((ret > 0 && to_copy > 0)
  81                 || (ret < 0 && errno == EINTR));
  82         if (ret > 0)
  83                 ret = copied;
  84         /* ret = 0 means orderly shutdown, ret < 0 is error. */
  85         return ret;
  86 }
  87
  88 static
  89 ssize_t lttng_live_send(int fd, const void *buf, size_t len)
  90 {
  91         ssize_t ret;
  92
  93         do {
  94                 ret = send(fd, buf, len, MSG_NOSIGNAL);
  95         } while (ret < 0 && errno == EINTR);
  96         return ret;
  97 }
  98
  99 static
 100 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,
 124                                 sizeof(struct sockaddr)) == -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(void)
 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(void)
 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         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         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(sizeof(struct 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 = zmalloc(session->stream_count *
 322                         sizeof(struct viewer_stream));
 323         if (!session->streams) {
 324                 goto error;
 325         }
 326
 327         for (i = 0; i < be32toh(rp.streams_count); i++) {
 328                 ret_len = lttng_live_recv(control_sock, &stream, sizeof(stream));
 329                 if (ret_len == 0) {
 330                         diag("[error] Remote side has closed connection");
 331                         goto error;
 332                 }
 333                 if (ret_len < 0) {
 334                         diag("Error receiving stream");
 335                         goto error;
 336                 }
 337                 session->streams[i].id = be64toh(stream.id);
 338
 339                 session->streams[i].ctf_trace_id = be64toh(stream.ctf_trace_id);
 340                 session->streams[i].first_read = 1;
 341                 session->streams[i].mmap_base = mmap(NULL, mmap_size,
 342                                 PROT_READ | PROT_WRITE,
 343                                 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
 344                 if (session->streams[i].mmap_base == MAP_FAILED) {
 345                         diag("mmap error");
 346                         goto error;
 347                 }
 348
 349                 if (be32toh(stream.metadata_flag)) {
 350                         session->streams[i].metadata_flag = 1;
 351                 }
 352         }
 353         return session->stream_count;
 354
 355 error:
 356         return -1;
 357 }
 358
 359 static int get_metadata(void)
 360 {
 361         struct lttng_viewer_cmd cmd;
 362         struct lttng_viewer_get_metadata rq;
 363         struct lttng_viewer_metadata_packet rp;
 364         ssize_t ret_len;
 365         int ret;
 366         uint64_t i;
 367         char *data = NULL;
 368         uint64_t len = 0;
 369         int metadata_stream_id = -1;
 370
 371         cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA);
 372         cmd.data_size = htobe64(sizeof(rq));
 373         cmd.cmd_version = htobe32(0);
 374
 375         for (i = 0; i < session->stream_count; i++) {
 376                 if (session->streams[i].metadata_flag) {
 377                         metadata_stream_id = i;
 378                         break;
 379                 }
 380         }
 381
 382         if (metadata_stream_id < 0) {
 383                 diag("No metadata stream found");
 384                 goto error;
 385         }
 386
 387         rq.stream_id = htobe64(session->streams[metadata_stream_id].id);
 388
 389 retry:
 390         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 391         if (ret_len < 0) {
 392                 diag("Error sending cmd");
 393                 goto error;
 394         }
 395         ret_len = lttng_live_send(control_sock, &rq, sizeof(rq));
 396         if (ret_len < 0) {
 397                 diag("Error sending get_metadata request");
 398                 goto error;
 399         }
 400         ret_len = lttng_live_recv(control_sock, &rp, sizeof(rp));
 401         if (ret_len == 0) {
 402                 diag("[error] Remote side has closed connection");
 403                 goto error;
 404         }
 405         if (ret_len < 0) {
 406                 diag("Error receiving metadata response");
 407                 goto error;
 408         }
 409         switch (be32toh(rp.status)) {
 410         case LTTNG_VIEWER_METADATA_OK:
 411                 break;
 412         case LTTNG_VIEWER_NO_NEW_METADATA:
 413                 diag("Got LTTNG_VIEWER_NO_NEW_METADATA:");
 414                 usleep(50);
 415                 goto retry;
 416         case LTTNG_VIEWER_METADATA_ERR:
 417                 diag("Got LTTNG_VIEWER_METADATA_ERR:");
 418                 goto error;
 419         default:
 420                 diag("Got unknown status during LTTNG_VIEWER_GET_METADATA");
 421                 goto error;
 422         }
 423
 424         len = be64toh(rp.len);
 425         if (len <= 0) {
 426                 goto error;
 427         }
 428
 429         data = zmalloc(len);
 430         if (!data) {
 431                 PERROR("relay data zmalloc");
 432                 goto error;
 433         }
 434         ret_len = lttng_live_recv(control_sock, data, len);
 435         if (ret_len == 0) {
 436                 diag("[error] Remote side has closed connection");
 437                 goto error_free_data;
 438         }
 439         if (ret_len < 0) {
 440                 diag("Error receiving trace packet");
 441                 goto error_free_data;
 442         }
 443         free(data);
 444         ret = len;
 445
 446         return ret;
 447
 448 error_free_data:
 449         free(data);
 450 error:
 451         return -1;
 452 }
 453
 454 static int get_next_index(void)
 455 {
 456         struct lttng_viewer_cmd cmd;
 457         struct lttng_viewer_get_next_index rq;
 458         struct lttng_viewer_index rp;
 459         ssize_t ret_len;
 460         int id;
 461
 462         cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX);
 463         cmd.data_size = htobe64(sizeof(rq));
 464         cmd.cmd_version = htobe32(0);
 465
 466         for (id = 0; id < session->stream_count; id++) {
 467                 if (session->streams[id].metadata_flag) {
 468                         continue;
 469                 }
 470                 memset(&rq, 0, sizeof(rq));
 471                 rq.stream_id = htobe64(session->streams[id].id);
 472
 473 retry:
 474                 ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 475                 if (ret_len < 0) {
 476                         diag("Error sending cmd");
 477                         goto error;
 478                 }
 479                 ret_len = lttng_live_send(control_sock, &rq, sizeof(rq));
 480                 if (ret_len < 0) {
 481                         diag("Error sending get_next_index request");
 482                         goto error;
 483                 }
 484                 ret_len = lttng_live_recv(control_sock, &rp, sizeof(rp));
 485                 if (ret_len == 0) {
 486                         diag("[error] Remote side has closed connection");
 487                         goto error;
 488                 }
 489                 if (ret_len < 0) {
 490                         diag("Error receiving index response");
 491                         goto error;
 492                 }
 493
 494                 rp.flags = be32toh(rp.flags);
 495
 496                 switch (be32toh(rp.status)) {
 497                 case LTTNG_VIEWER_INDEX_INACTIVE:
 498                         /* Skip this stream. */
 499                         diag("Got LTTNG_VIEWER_INDEX_INACTIVE");
 500                         continue;
 501                 case LTTNG_VIEWER_INDEX_OK:
 502                         break;
 503                 case LTTNG_VIEWER_INDEX_RETRY:
 504                         sleep(1);
 505                         goto retry;
 506                 case LTTNG_VIEWER_INDEX_HUP:
 507                         diag("Got LTTNG_VIEWER_INDEX_HUP");
 508                         session->streams[id].id = -1ULL;
 509                         session->streams[id].fd = -1;
 510                         goto error;
 511                 case LTTNG_VIEWER_INDEX_ERR:
 512                         diag("Got LTTNG_VIEWER_INDEX_ERR");
 513                         goto error;
 514                 default:
 515                         diag("Unknown reply status during LTTNG_VIEWER_GET_NEXT_INDEX (%d)", be32toh(rp.status));
 516                         goto error;
 517                 }
 518                 if (first_packet_stream_id < 0) {
 519                         /*
 520                          * Initialize the first packet stream id. That is,
 521                          * the first active stream encoutered.
 522                          */
 523                         first_packet_offset = be64toh(rp.offset);
 524                         first_packet_len = be64toh(rp.packet_size) / CHAR_BIT;
 525                         first_packet_stream_id = id;
 526                         diag("Got first packet index with offset %d and len %d",
 527                                         first_packet_offset, first_packet_len);
 528                 }
 529         }
 530         return 0;
 531
 532 error:
 533         return -1;
 534 }
 535
 536 static
 537 int get_data_packet(int id, uint64_t offset,
 538                 uint64_t len)
 539 {
 540         struct lttng_viewer_cmd cmd;
 541         struct lttng_viewer_get_packet rq;
 542         struct lttng_viewer_trace_packet rp;
 543         ssize_t ret_len;
 544
 545         cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET);
 546         cmd.data_size = htobe64(sizeof(rq));
 547         cmd.cmd_version = htobe32(0);
 548
 549         memset(&rq, 0, sizeof(rq));
 550         rq.stream_id = htobe64(session->streams[id].id);
 551         /* Already in big endian. */
 552         rq.offset = offset;
 553         rq.len = htobe32(len);
 554
 555         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 556         if (ret_len < 0) {
 557                 diag("Error sending cmd");
 558                 goto error;
 559         }
 560         ret_len = lttng_live_send(control_sock, &rq, sizeof(rq));
 561         if (ret_len < 0) {
 562                 diag("Error sending get_data_packet request");
 563                 goto error;
 564         }
 565         ret_len = lttng_live_recv(control_sock, &rp, sizeof(rp));
 566         if (ret_len == 0) {
 567                 diag("[error] Remote side has closed connection");
 568                 goto error;
 569         }
 570         if (ret_len < 0) {
 571                 diag("Error receiving data response");
 572                 goto error;
 573         }
 574         rp.flags = be32toh(rp.flags);
 575
 576         switch (be32toh(rp.status)) {
 577         case LTTNG_VIEWER_GET_PACKET_OK:
 578                 len = be32toh(rp.len);
 579                 if (len == 0) {
 580                         diag("Got LTTNG_VIEWER_GET_PACKET_OK, but len == 0");
 581                         goto error;
 582                 }
 583                 break;
 584         case LTTNG_VIEWER_GET_PACKET_RETRY:
 585                 diag("Got LTTNG_VIEWER_GET_PACKET_RETRY:");
 586                 goto error;
 587         case LTTNG_VIEWER_GET_PACKET_ERR:
 588                 if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) {
 589                         diag("Got LTTNG_VIEWER_GET_PACKET_ERR with NEW_METADATA flag");
 590                         goto end;
 591                 }
 592                 diag("Got LTTNG_VIEWER_GET_PACKET_ERR:");
 593                 goto error;
 594         default:
 595                 diag("Got unknown status code during LTTNG_VIEWER_GET_PACKET");
 596                 goto error;
 597         }
 598
 599         if (len > mmap_size) {
 600                 diag("mmap_size not big enough");
 601                 goto error;
 602         }
 603
 604         ret_len = lttng_live_recv(control_sock, session->streams[id].mmap_base, len);
 605         if (ret_len == 0) {
 606                 diag("[error] Remote side has closed connection");
 607                 goto error;
 608         }
 609         if (ret_len < 0) {
 610                 diag("Error receiving trace packet");
 611                 goto error;
 612         }
 613 end:
 614         return 0;
 615 error:
 616         return -1;
 617 }
 618
 619 static int detach_viewer_session(uint64_t id)
 620 {
 621         struct lttng_viewer_cmd cmd;
 622         struct lttng_viewer_detach_session_response resp;
 623         struct lttng_viewer_detach_session_request rq;
 624         int ret;
 625         ssize_t ret_len;
 626
 627         cmd.cmd = htobe32(LTTNG_VIEWER_DETACH_SESSION);
 628         cmd.data_size = htobe64(sizeof(rq));
 629         cmd.cmd_version = htobe32(0);
 630
 631         memset(&rq, 0, sizeof(rq));
 632         rq.session_id = htobe64(id);
 633
 634         ret_len = lttng_live_send(control_sock, &cmd, sizeof(cmd));
 635         if (ret_len < 0) {
 636                 fprintf(stderr, "[error] Error sending cmd\n");
 637                 ret = ret_len;
 638                 goto error;
 639         }
 640
 641         ret_len = lttng_live_send(control_sock, &rq, sizeof(rq));
 642         if (ret_len < 0) {
 643                 fprintf(stderr, "Error sending attach request\n");
 644                 ret = ret_len;
 645                 goto error;
 646         }
 647
 648         ret_len = lttng_live_recv(control_sock, &resp, sizeof(resp));
 649         if (ret_len < 0) {
 650                 fprintf(stderr, "[error] Error receiving detach session reply\n");
 651                 ret = ret_len;
 652                 goto error;
 653         }
 654
 655         if (be32toh(resp.status) != LTTNG_VIEWER_DETACH_SESSION_OK) {
 656                 fprintf(stderr, "[error] Error detaching viewer session\n");
 657                 ret = -1;
 658                 goto error;
 659         }
 660         ret = 0;
 661
 662 error:
 663         return ret;
 664 }
 665
 666 int main(int argc, char **argv)
 667 {
 668         int ret;
 669         uint64_t session_id;
 670
 671         plan_tests(NUM_TESTS);
 672
 673         diag("Live unit tests");
 674
 675         ret = connect_viewer("localhost");
 676         ok(ret == 0, "Connect viewer to relayd");
 677
 678         ret = establish_connection();
 679         ok(ret == 0, "Established connection and version check with %d.%d",
 680                         VERSION_MAJOR, VERSION_MINOR);
 681
 682         ret = list_sessions(&session_id);
 683         ok(ret > 0, "List sessions : %d session(s)", ret);
 684         if (ret < 0) {
 685                 goto end;
 686         }
 687
 688         ret = create_viewer_session();
 689         ok(ret == 0, "Create viewer session");
 690
 691         ret = attach_session(session_id);
 692         ok(ret > 0, "Attach to session, %d stream(s) received", ret);
 693
 694         ret = get_metadata();
 695         ok(ret > 0, "Get metadata, received %d bytes", ret);
 696
 697         ret = get_next_index();
 698         ok(ret == 0, "Get one index per stream");
 699
 700         ret = get_data_packet(first_packet_stream_id, first_packet_offset,
 701                         first_packet_len);
 702         ok(ret == 0,
 703                         "Get one data packet for stream %d, offset %d, len %d",
 704                         first_packet_stream_id, first_packet_offset,
 705                         first_packet_len);
 706
 707         ret = detach_viewer_session(session_id);
 708         ok(ret == 0, "Detach viewer session");
 709
 710         ret = list_sessions(&session_id);
 711         ok(ret > 0, "List sessions : %d session(s)", ret);
 712
 713         ret = attach_session(session_id);
 714         ok(ret > 0, "Attach to session, %d streams received", ret);
 715 end:
 716         return exit_status();
 717 }