tests/reconnect.at

   1 AT_BANNER([reconnect library])
   2
   3 m4_define([__RECONNECT_CHECK],
   4   [AT_SETUP([$1])
   5    AT_KEYWORDS([reconnect])
   6    AT_DATA([input], [$2])
   7    AT_CHECK([$3], [0], [$4])
   8    AT_CLEANUP])
   9
  10 m4_define([RECONNECT_CHECK],
  11   [__RECONNECT_CHECK(
  12      [$1 - C],
  13      [$2],
  14      [ovstest test-reconnect < input],
  15      [$3])
  16    __RECONNECT_CHECK(
  17      [$1 - Python3],
  18      [$2],
  19      [$PYTHON3 $srcdir/test-reconnect.py < input],
  20      [$3])])
  21
  22 ######################################################################
  23 RECONNECT_CHECK([nothing happens if not enabled],
  24   [run
  25 timeout
  26 ],
  27   [### t=1000 ###
  28 run
  29 timeout
  30   no timeout
  31 ])
  32
  33 ######################################################################
  34 RECONNECT_CHECK([quick connect, idle disconnect],
  35   [enable
  36
  37 # Connection succeeds.
  38 run
  39 connected
  40
  41 # Send inactivity probe.
  42 timeout
  43 run
  44
  45 # Idle timeout kills connection.
  46 timeout
  47 run
  48 disconnected
  49 ],
  50   [### t=1000 ###
  51 enable
  52   in BACKOFF for 0 ms (0 ms backoff)
  53
  54 # Connection succeeds.
  55 run
  56   should connect
  57 connected
  58   in ACTIVE for 0 ms (0 ms backoff)
  59   created 1000, last activity 1000, last connected 1000
  60   1 successful connections out of 1 attempts, seqno 1
  61   connected
  62   last connected 0 ms ago, connected 0 ms total
  63
  64 # Send inactivity probe.
  65 timeout
  66   advance 5000 ms
  67
  68 ### t=6000 ###
  69   in ACTIVE for 5000 ms (0 ms backoff)
  70 run
  71   should send probe
  72   in IDLE for 0 ms (0 ms backoff)
  73
  74 # Idle timeout kills connection.
  75 timeout
  76   advance 5000 ms
  77
  78 ### t=11000 ###
  79   in IDLE for 5000 ms (0 ms backoff)
  80 run
  81   should disconnect
  82 disconnected
  83   in BACKOFF for 0 ms (1000 ms backoff)
  84   1 successful connections out of 1 attempts, seqno 2
  85   disconnected
  86   disconnected at 11000 ms (0 ms ago)
  87 ])
  88
  89 ######################################################################
  90 RECONNECT_CHECK([slow connect, idle disconnect],
  91   [enable
  92
  93 # Start connecting.
  94 run
  95 connecting
  96
  97 # Connect after 500 ms.
  98 advance 500
  99 run
 100 connected
 101
 102 # Send inactivity probe.
 103 timeout
 104 run
 105
 106 # Idle timeout kills connection.
 107 timeout
 108 run
 109 disconnected
 110 ],
 111   [### t=1000 ###
 112 enable
 113   in BACKOFF for 0 ms (0 ms backoff)
 114
 115 # Start connecting.
 116 run
 117   should connect
 118 connecting
 119   in CONNECTING for 0 ms (0 ms backoff)
 120
 121 # Connect after 500 ms.
 122 advance 500
 123
 124 ### t=1500 ###
 125   in CONNECTING for 500 ms (0 ms backoff)
 126 run
 127 connected
 128   in ACTIVE for 0 ms (0 ms backoff)
 129   created 1000, last activity 1000, last connected 1500
 130   1 successful connections out of 1 attempts, seqno 1
 131   connected
 132   last connected 0 ms ago, connected 0 ms total
 133
 134 # Send inactivity probe.
 135 timeout
 136   advance 5000 ms
 137
 138 ### t=6500 ###
 139   in ACTIVE for 5000 ms (0 ms backoff)
 140 run
 141   should send probe
 142   in IDLE for 0 ms (0 ms backoff)
 143
 144 # Idle timeout kills connection.
 145 timeout
 146   advance 5000 ms
 147
 148 ### t=11500 ###
 149   in IDLE for 5000 ms (0 ms backoff)
 150 run
 151   should disconnect
 152 disconnected
 153   in BACKOFF for 0 ms (1000 ms backoff)
 154   1 successful connections out of 1 attempts, seqno 2
 155   disconnected
 156   disconnected at 11500 ms (0 ms ago)
 157 ])
 158
 159 ######################################################################
 160 RECONNECT_CHECK([connect backs off],
 161   [enable
 162
 163 # First connection attempt fails after 1000 ms.
 164 run
 165 connecting
 166 run
 167 timeout
 168 run
 169 connect-failed
 170
 171 # Back off for 1000 ms.
 172 timeout
 173 run
 174
 175 # Second connection attempt fails after 1000 ms.
 176 connecting
 177 timeout
 178 run
 179 connect-failed
 180
 181 # Back off for 2000 ms.
 182 timeout
 183 run
 184
 185 # Third connection attempt fails after 2000 ms.
 186 connecting
 187 timeout
 188 run
 189 connect-failed
 190
 191 # Back off for 4000 ms.
 192 timeout
 193 run
 194
 195 # Third connection attempt fails after 4000 ms.
 196 connecting
 197 timeout
 198 run
 199 connect-failed
 200
 201 # Back off for 8000 ms.
 202 timeout
 203 run
 204
 205 # Third connection attempt fails after 8000 ms.
 206 connecting
 207 timeout
 208 run
 209 connect-failed
 210
 211 # Back off for 8000 ms.
 212 timeout
 213 run
 214
 215 # Fourth connection attempt fails after 8000 ms.
 216 connecting
 217 timeout
 218 run
 219 connect-failed
 220 ],
 221   [### t=1000 ###
 222 enable
 223   in BACKOFF for 0 ms (0 ms backoff)
 224
 225 # First connection attempt fails after 1000 ms.
 226 run
 227   should connect
 228 connecting
 229   in CONNECTING for 0 ms (0 ms backoff)
 230 run
 231 timeout
 232   advance 1000 ms
 233
 234 ### t=2000 ###
 235   in CONNECTING for 1000 ms (0 ms backoff)
 236 run
 237   should disconnect
 238 connect-failed
 239   in BACKOFF for 0 ms (1000 ms backoff)
 240   0 successful connections out of 1 attempts, seqno 0
 241
 242 # Back off for 1000 ms.
 243 timeout
 244   advance 1000 ms
 245
 246 ### t=3000 ###
 247   in BACKOFF for 1000 ms (1000 ms backoff)
 248 run
 249   should connect
 250
 251 # Second connection attempt fails after 1000 ms.
 252 connecting
 253   in CONNECTING for 0 ms (1000 ms backoff)
 254 timeout
 255   advance 1000 ms
 256
 257 ### t=4000 ###
 258   in CONNECTING for 1000 ms (1000 ms backoff)
 259 run
 260   should disconnect
 261 connect-failed
 262   in BACKOFF for 0 ms (2000 ms backoff)
 263   0 successful connections out of 2 attempts, seqno 0
 264
 265 # Back off for 2000 ms.
 266 timeout
 267   advance 2000 ms
 268
 269 ### t=6000 ###
 270   in BACKOFF for 2000 ms (2000 ms backoff)
 271 run
 272   should connect
 273
 274 # Third connection attempt fails after 2000 ms.
 275 connecting
 276   in CONNECTING for 0 ms (2000 ms backoff)
 277 timeout
 278   advance 2000 ms
 279
 280 ### t=8000 ###
 281   in CONNECTING for 2000 ms (2000 ms backoff)
 282 run
 283   should disconnect
 284 connect-failed
 285   in BACKOFF for 0 ms (4000 ms backoff)
 286   0 successful connections out of 3 attempts, seqno 0
 287
 288 # Back off for 4000 ms.
 289 timeout
 290   advance 4000 ms
 291
 292 ### t=12000 ###
 293   in BACKOFF for 4000 ms (4000 ms backoff)
 294 run
 295   should connect
 296
 297 # Third connection attempt fails after 4000 ms.
 298 connecting
 299   in CONNECTING for 0 ms (4000 ms backoff)
 300 timeout
 301   advance 4000 ms
 302
 303 ### t=16000 ###
 304   in CONNECTING for 4000 ms (4000 ms backoff)
 305 run
 306   should disconnect
 307 connect-failed
 308   in BACKOFF for 0 ms (8000 ms backoff)
 309   0 successful connections out of 4 attempts, seqno 0
 310
 311 # Back off for 8000 ms.
 312 timeout
 313   advance 8000 ms
 314
 315 ### t=24000 ###
 316   in BACKOFF for 8000 ms (8000 ms backoff)
 317 run
 318   should connect
 319
 320 # Third connection attempt fails after 8000 ms.
 321 connecting
 322   in CONNECTING for 0 ms (8000 ms backoff)
 323 timeout
 324   advance 8000 ms
 325
 326 ### t=32000 ###
 327   in CONNECTING for 8000 ms (8000 ms backoff)
 328 run
 329   should disconnect
 330 connect-failed
 331   in BACKOFF for 0 ms (8000 ms backoff)
 332   0 successful connections out of 5 attempts, seqno 0
 333
 334 # Back off for 8000 ms.
 335 timeout
 336   advance 8000 ms
 337
 338 ### t=40000 ###
 339   in BACKOFF for 8000 ms (8000 ms backoff)
 340 run
 341   should connect
 342
 343 # Fourth connection attempt fails after 8000 ms.
 344 connecting
 345   in CONNECTING for 0 ms (8000 ms backoff)
 346 timeout
 347   advance 8000 ms
 348
 349 ### t=48000 ###
 350   in CONNECTING for 8000 ms (8000 ms backoff)
 351 run
 352   should disconnect
 353 connect-failed
 354   in BACKOFF for 0 ms (8000 ms backoff)
 355   0 successful connections out of 6 attempts, seqno 0
 356 ])
 357
 358 ######################################################################
 359 RECONNECT_CHECK([connections with no data preserve backoff],
 360   [enable
 361
 362 # First connect, then idle timeout kills connection.
 363 run
 364 connected
 365 timeout
 366 run
 367 timeout
 368 run
 369 disconnected
 370
 371 # Back off for 1000 ms.
 372 timeout
 373 run
 374
 375 # Second connect, then idle timeout kills connection.
 376 run
 377 connected
 378 timeout
 379 run
 380 timeout
 381 run
 382 disconnected
 383
 384 # Back off for 2000 ms.
 385 timeout
 386 run
 387
 388 # Third connect, then idle timeout kills connection.
 389 run
 390 connected
 391 timeout
 392 run
 393 timeout
 394 run
 395 disconnected
 396
 397 # Back off for 4000 ms.
 398 timeout
 399 ], [### t=1000 ###
 400 enable
 401   in BACKOFF for 0 ms (0 ms backoff)
 402
 403 # First connect, then idle timeout kills connection.
 404 run
 405   should connect
 406 connected
 407   in ACTIVE for 0 ms (0 ms backoff)
 408   created 1000, last activity 1000, last connected 1000
 409   1 successful connections out of 1 attempts, seqno 1
 410   connected
 411   last connected 0 ms ago, connected 0 ms total
 412 timeout
 413   advance 5000 ms
 414
 415 ### t=6000 ###
 416   in ACTIVE for 5000 ms (0 ms backoff)
 417 run
 418   should send probe
 419   in IDLE for 0 ms (0 ms backoff)
 420 timeout
 421   advance 5000 ms
 422
 423 ### t=11000 ###
 424   in IDLE for 5000 ms (0 ms backoff)
 425 run
 426   should disconnect
 427 disconnected
 428   in BACKOFF for 0 ms (1000 ms backoff)
 429   1 successful connections out of 1 attempts, seqno 2
 430   disconnected
 431   disconnected at 11000 ms (0 ms ago)
 432
 433 # Back off for 1000 ms.
 434 timeout
 435   advance 1000 ms
 436
 437 ### t=12000 ###
 438   in BACKOFF for 1000 ms (1000 ms backoff)
 439   last connected 11000 ms ago, connected 10000 ms total
 440 run
 441   should connect
 442
 443 # Second connect, then idle timeout kills connection.
 444 run
 445   should connect
 446 connected
 447   in ACTIVE for 0 ms (1000 ms backoff)
 448   created 1000, last activity 1000, last connected 12000
 449   2 successful connections out of 2 attempts, seqno 3
 450   connected
 451   last connected 0 ms ago, connected 10000 ms total
 452 timeout
 453   advance 5000 ms
 454
 455 ### t=17000 ###
 456   in ACTIVE for 5000 ms (1000 ms backoff)
 457 run
 458   should send probe
 459   in IDLE for 0 ms (1000 ms backoff)
 460 timeout
 461   advance 5000 ms
 462
 463 ### t=22000 ###
 464   in IDLE for 5000 ms (1000 ms backoff)
 465 run
 466   should disconnect
 467 disconnected
 468   in BACKOFF for 0 ms (2000 ms backoff)
 469   2 successful connections out of 2 attempts, seqno 4
 470   disconnected
 471   disconnected at 22000 ms (0 ms ago)
 472
 473 # Back off for 2000 ms.
 474 timeout
 475   advance 2000 ms
 476
 477 ### t=24000 ###
 478   in BACKOFF for 2000 ms (2000 ms backoff)
 479   last connected 12000 ms ago, connected 20000 ms total
 480 run
 481   should connect
 482
 483 # Third connect, then idle timeout kills connection.
 484 run
 485   should connect
 486 connected
 487   in ACTIVE for 0 ms (2000 ms backoff)
 488   created 1000, last activity 1000, last connected 24000
 489   3 successful connections out of 3 attempts, seqno 5
 490   connected
 491   last connected 0 ms ago, connected 20000 ms total
 492 timeout
 493   advance 5000 ms
 494
 495 ### t=29000 ###
 496   in ACTIVE for 5000 ms (2000 ms backoff)
 497 run
 498   should send probe
 499   in IDLE for 0 ms (2000 ms backoff)
 500 timeout
 501   advance 5000 ms
 502
 503 ### t=34000 ###
 504   in IDLE for 5000 ms (2000 ms backoff)
 505 run
 506   should disconnect
 507 disconnected
 508   in BACKOFF for 0 ms (4000 ms backoff)
 509   3 successful connections out of 3 attempts, seqno 6
 510   disconnected
 511   disconnected at 34000 ms (0 ms ago)
 512
 513 # Back off for 4000 ms.
 514 timeout
 515   advance 4000 ms
 516
 517 ### t=38000 ###
 518   in BACKOFF for 4000 ms (4000 ms backoff)
 519   last connected 14000 ms ago, connected 30000 ms total
 520 ])
 521
 522 ######################################################################
 523 RECONNECT_CHECK([brief connection preserves backoff],
 524   [enable
 525
 526 # First connection attempt fails after 1000 ms.
 527 run
 528 connecting
 529 run
 530 timeout
 531 run
 532 connect-failed
 533
 534 # Back off for 1000 ms.
 535 timeout
 536 run
 537
 538 # Second connection attempt fails after 1000 ms.
 539 connecting
 540 timeout
 541 run
 542 connect-failed
 543
 544 # Back off for 2000 ms.
 545 timeout
 546 run
 547
 548 # Third connection attempt succeeds after 500 ms.
 549 connecting
 550 advance 500
 551 run
 552 connected
 553
 554 # Connection drops after another 250 ms.
 555 advance 250
 556 disconnected
 557 run
 558
 559 # Back off for 4000 ms.
 560 timeout
 561 run
 562 ], [### t=1000 ###
 563 enable
 564   in BACKOFF for 0 ms (0 ms backoff)
 565
 566 # First connection attempt fails after 1000 ms.
 567 run
 568   should connect
 569 connecting
 570   in CONNECTING for 0 ms (0 ms backoff)
 571 run
 572 timeout
 573   advance 1000 ms
 574
 575 ### t=2000 ###
 576   in CONNECTING for 1000 ms (0 ms backoff)
 577 run
 578   should disconnect
 579 connect-failed
 580   in BACKOFF for 0 ms (1000 ms backoff)
 581   0 successful connections out of 1 attempts, seqno 0
 582
 583 # Back off for 1000 ms.
 584 timeout
 585   advance 1000 ms
 586
 587 ### t=3000 ###
 588   in BACKOFF for 1000 ms (1000 ms backoff)
 589 run
 590   should connect
 591
 592 # Second connection attempt fails after 1000 ms.
 593 connecting
 594   in CONNECTING for 0 ms (1000 ms backoff)
 595 timeout
 596   advance 1000 ms
 597
 598 ### t=4000 ###
 599   in CONNECTING for 1000 ms (1000 ms backoff)
 600 run
 601   should disconnect
 602 connect-failed
 603   in BACKOFF for 0 ms (2000 ms backoff)
 604   0 successful connections out of 2 attempts, seqno 0
 605
 606 # Back off for 2000 ms.
 607 timeout
 608   advance 2000 ms
 609
 610 ### t=6000 ###
 611   in BACKOFF for 2000 ms (2000 ms backoff)
 612 run
 613   should connect
 614
 615 # Third connection attempt succeeds after 500 ms.
 616 connecting
 617   in CONNECTING for 0 ms (2000 ms backoff)
 618 advance 500
 619
 620 ### t=6500 ###
 621   in CONNECTING for 500 ms (2000 ms backoff)
 622 run
 623 connected
 624   in ACTIVE for 0 ms (2000 ms backoff)
 625   created 1000, last activity 1000, last connected 6500
 626   1 successful connections out of 3 attempts, seqno 1
 627   connected
 628   last connected 0 ms ago, connected 0 ms total
 629
 630 # Connection drops after another 250 ms.
 631 advance 250
 632
 633 ### t=6750 ###
 634   in ACTIVE for 250 ms (2000 ms backoff)
 635 disconnected
 636   in BACKOFF for 0 ms (4000 ms backoff)
 637   1 successful connections out of 3 attempts, seqno 2
 638   disconnected
 639   disconnected at 6750 ms (0 ms ago)
 640 run
 641
 642 # Back off for 4000 ms.
 643 timeout
 644   advance 4000 ms
 645
 646 ### t=10750 ###
 647   in BACKOFF for 4000 ms (4000 ms backoff)
 648   last connected 4250 ms ago, connected 250 ms total
 649 run
 650   should connect
 651 ])
 652
 653 ######################################################################
 654 RECONNECT_CHECK([brief connection with data preserves backoff],
 655   [enable
 656
 657 # First connection attempt fails after 1000 ms.
 658 run
 659 connecting
 660 run
 661 timeout
 662 run
 663 connect-failed
 664
 665 # Back off for 1000 ms.
 666 timeout
 667 run
 668
 669 # Second connection attempt fails after 1000 ms.
 670 connecting
 671 timeout
 672 run
 673 connect-failed
 674
 675 # Back off for 2000 ms.
 676 timeout
 677 run
 678
 679 # Third connection attempt succeeds after 500 ms.
 680 connecting
 681 advance 500
 682 run
 683 connected
 684
 685 # Connection receives 3 chunks of data spaced 250 ms apart.
 686 advance 250
 687 run
 688 activity
 689 advance 250
 690 run
 691 activity
 692 advance 250
 693 run
 694 activity
 695
 696 # Connection drops.
 697 disconnected
 698 run
 699
 700 # Back off for 4000 ms.
 701 timeout
 702 run
 703 ],
 704   [### t=1000 ###
 705 enable
 706   in BACKOFF for 0 ms (0 ms backoff)
 707
 708 # First connection attempt fails after 1000 ms.
 709 run
 710   should connect
 711 connecting
 712   in CONNECTING for 0 ms (0 ms backoff)
 713 run
 714 timeout
 715   advance 1000 ms
 716
 717 ### t=2000 ###
 718   in CONNECTING for 1000 ms (0 ms backoff)
 719 run
 720   should disconnect
 721 connect-failed
 722   in BACKOFF for 0 ms (1000 ms backoff)
 723   0 successful connections out of 1 attempts, seqno 0
 724
 725 # Back off for 1000 ms.
 726 timeout
 727   advance 1000 ms
 728
 729 ### t=3000 ###
 730   in BACKOFF for 1000 ms (1000 ms backoff)
 731 run
 732   should connect
 733
 734 # Second connection attempt fails after 1000 ms.
 735 connecting
 736   in CONNECTING for 0 ms (1000 ms backoff)
 737 timeout
 738   advance 1000 ms
 739
 740 ### t=4000 ###
 741   in CONNECTING for 1000 ms (1000 ms backoff)
 742 run
 743   should disconnect
 744 connect-failed
 745   in BACKOFF for 0 ms (2000 ms backoff)
 746   0 successful connections out of 2 attempts, seqno 0
 747
 748 # Back off for 2000 ms.
 749 timeout
 750   advance 2000 ms
 751
 752 ### t=6000 ###
 753   in BACKOFF for 2000 ms (2000 ms backoff)
 754 run
 755   should connect
 756
 757 # Third connection attempt succeeds after 500 ms.
 758 connecting
 759   in CONNECTING for 0 ms (2000 ms backoff)
 760 advance 500
 761
 762 ### t=6500 ###
 763   in CONNECTING for 500 ms (2000 ms backoff)
 764 run
 765 connected
 766   in ACTIVE for 0 ms (2000 ms backoff)
 767   created 1000, last activity 1000, last connected 6500
 768   1 successful connections out of 3 attempts, seqno 1
 769   connected
 770   last connected 0 ms ago, connected 0 ms total
 771
 772 # Connection receives 3 chunks of data spaced 250 ms apart.
 773 advance 250
 774
 775 ### t=6750 ###
 776   in ACTIVE for 250 ms (2000 ms backoff)
 777 run
 778 activity
 779   created 1000, last activity 6750, last connected 6500
 780 advance 250
 781
 782 ### t=7000 ###
 783   in ACTIVE for 500 ms (2000 ms backoff)
 784 run
 785 activity
 786   created 1000, last activity 7000, last connected 6500
 787 advance 250
 788
 789 ### t=7250 ###
 790   in ACTIVE for 750 ms (2000 ms backoff)
 791 run
 792 activity
 793   created 1000, last activity 7250, last connected 6500
 794
 795 # Connection drops.
 796 disconnected
 797   in BACKOFF for 0 ms (4000 ms backoff)
 798   1 successful connections out of 3 attempts, seqno 2
 799   disconnected
 800   disconnected at 7250 ms (0 ms ago)
 801 run
 802
 803 # Back off for 4000 ms.
 804 timeout
 805   advance 4000 ms
 806
 807 ### t=11250 ###
 808   in BACKOFF for 4000 ms (4000 ms backoff)
 809   last connected 4750 ms ago, connected 750 ms total
 810 run
 811   should connect
 812 ])
 813
 814 ######################################################################
 815 RECONNECT_CHECK([long connection resets backoff],
 816   [enable
 817
 818 # First connection attempt fails after 1000 ms.
 819 run
 820 connecting
 821 run
 822 timeout
 823 run
 824 connect-failed
 825
 826 # Back off for 1000 ms.
 827 timeout
 828 run
 829
 830 # Second connection attempt fails after 1000 ms.
 831 connecting
 832 timeout
 833 run
 834 connect-failed
 835
 836 # Back off for 2000 ms.
 837 timeout
 838 run
 839
 840 # Third connection attempt succeeds after 500 ms.
 841 connecting
 842 advance 500
 843 run
 844 connected
 845
 846 # Connection receives 3 chunks of data spaced 2000 ms apart.
 847 advance 2000
 848 run
 849 activity
 850 advance 2000
 851 run
 852 activity
 853 advance 2000
 854 run
 855 activity
 856
 857 # Connection drops.
 858 disconnected
 859 run
 860
 861 # Back off for 1000 ms.
 862 timeout
 863 run
 864 ],
 865   [### t=1000 ###
 866 enable
 867   in BACKOFF for 0 ms (0 ms backoff)
 868
 869 # First connection attempt fails after 1000 ms.
 870 run
 871   should connect
 872 connecting
 873   in CONNECTING for 0 ms (0 ms backoff)
 874 run
 875 timeout
 876   advance 1000 ms
 877
 878 ### t=2000 ###
 879   in CONNECTING for 1000 ms (0 ms backoff)
 880 run
 881   should disconnect
 882 connect-failed
 883   in BACKOFF for 0 ms (1000 ms backoff)
 884   0 successful connections out of 1 attempts, seqno 0
 885
 886 # Back off for 1000 ms.
 887 timeout
 888   advance 1000 ms
 889
 890 ### t=3000 ###
 891   in BACKOFF for 1000 ms (1000 ms backoff)
 892 run
 893   should connect
 894
 895 # Second connection attempt fails after 1000 ms.
 896 connecting
 897   in CONNECTING for 0 ms (1000 ms backoff)
 898 timeout
 899   advance 1000 ms
 900
 901 ### t=4000 ###
 902   in CONNECTING for 1000 ms (1000 ms backoff)
 903 run
 904   should disconnect
 905 connect-failed
 906   in BACKOFF for 0 ms (2000 ms backoff)
 907   0 successful connections out of 2 attempts, seqno 0
 908
 909 # Back off for 2000 ms.
 910 timeout
 911   advance 2000 ms
 912
 913 ### t=6000 ###
 914   in BACKOFF for 2000 ms (2000 ms backoff)
 915 run
 916   should connect
 917
 918 # Third connection attempt succeeds after 500 ms.
 919 connecting
 920   in CONNECTING for 0 ms (2000 ms backoff)
 921 advance 500
 922
 923 ### t=6500 ###
 924   in CONNECTING for 500 ms (2000 ms backoff)
 925 run
 926 connected
 927   in ACTIVE for 0 ms (2000 ms backoff)
 928   created 1000, last activity 1000, last connected 6500
 929   1 successful connections out of 3 attempts, seqno 1
 930   connected
 931   last connected 0 ms ago, connected 0 ms total
 932
 933 # Connection receives 3 chunks of data spaced 2000 ms apart.
 934 advance 2000
 935
 936 ### t=8500 ###
 937   in ACTIVE for 2000 ms (2000 ms backoff)
 938 run
 939 activity
 940   created 1000, last activity 8500, last connected 6500
 941 advance 2000
 942
 943 ### t=10500 ###
 944   in ACTIVE for 4000 ms (2000 ms backoff)
 945 run
 946 activity
 947   created 1000, last activity 10500, last connected 6500
 948 advance 2000
 949
 950 ### t=12500 ###
 951   in ACTIVE for 6000 ms (2000 ms backoff)
 952 run
 953 activity
 954   created 1000, last activity 12500, last connected 6500
 955
 956 # Connection drops.
 957 disconnected
 958   in BACKOFF for 0 ms (1000 ms backoff)
 959   1 successful connections out of 3 attempts, seqno 2
 960   disconnected
 961   disconnected at 12500 ms (0 ms ago)
 962 run
 963
 964 # Back off for 1000 ms.
 965 timeout
 966   advance 1000 ms
 967
 968 ### t=13500 ###
 969   in BACKOFF for 1000 ms (1000 ms backoff)
 970   last connected 7000 ms ago, connected 6000 ms total
 971 run
 972   should connect
 973 ])
 974
 975 ######################################################################
 976 RECONNECT_CHECK([connection attempt fails quickly],
 977   [enable
 978
 979 # Connection fails quickly.
 980 run
 981 connect-failed ECONNREFUSED
 982
 983 # Back off for 1000 ms.
 984 run
 985 timeout
 986
 987 # Connection fails quickly again.
 988 run
 989 connect-failed ECONNREFUSED
 990
 991 # Back off for 2000 ms.
 992 run
 993 timeout
 994 ],
 995    [### t=1000 ###
 996 enable
 997   in BACKOFF for 0 ms (0 ms backoff)
 998
 999 # Connection fails quickly.
1000 run
1001   should connect
1002 connect-failed ECONNREFUSED
1003   in BACKOFF for 0 ms (1000 ms backoff)
1004   0 successful connections out of 1 attempts, seqno 0
1005
1006 # Back off for 1000 ms.
1007 run
1008 timeout
1009   advance 1000 ms
1010
1011 ### t=2000 ###
1012   in BACKOFF for 1000 ms (1000 ms backoff)
1013
1014 # Connection fails quickly again.
1015 run
1016   should connect
1017 connect-failed ECONNREFUSED
1018   in BACKOFF for 0 ms (2000 ms backoff)
1019   0 successful connections out of 2 attempts, seqno 0
1020
1021 # Back off for 2000 ms.
1022 run
1023 timeout
1024   advance 2000 ms
1025
1026 ### t=4000 ###
1027   in BACKOFF for 2000 ms (2000 ms backoff)
1028 ])
1029
1030 ######################################################################
1031 RECONNECT_CHECK([backoff-free tries work],
1032   [set-backoff-free-tries 2
1033 enable
1034
1035 # Connection fails quickly.
1036 run
1037 connect-failed ECONNREFUSED
1038
1039 # No backoff.
1040 run
1041 timeout
1042
1043 # Connection fails quickly again.
1044 run
1045 connect-failed ECONNREFUSED
1046
1047 # Back off for 1000 ms.
1048 run
1049 timeout
1050 ],
1051    [### t=1000 ###
1052 set-backoff-free-tries 2
1053 enable
1054   in BACKOFF for 0 ms (0 ms backoff)
1055
1056 # Connection fails quickly.
1057 run
1058   should connect
1059 connect-failed ECONNREFUSED
1060   0 successful connections out of 1 attempts, seqno 0
1061
1062 # No backoff.
1063 run
1064   should connect
1065 timeout
1066   advance 0 ms
1067
1068 # Connection fails quickly again.
1069 run
1070   should connect
1071 connect-failed ECONNREFUSED
1072   in BACKOFF for 0 ms (1000 ms backoff)
1073   0 successful connections out of 2 attempts, seqno 0
1074
1075 # Back off for 1000 ms.
1076 run
1077 timeout
1078   advance 1000 ms
1079
1080 ### t=2000 ###
1081   in BACKOFF for 1000 ms (1000 ms backoff)
1082 ])
1083
1084 ######################################################################
1085 RECONNECT_CHECK([max-tries of 1 honored],
1086   [set-max-tries 1
1087 enable
1088
1089 # Connection succeeds.
1090 run
1091 connected
1092
1093 # Send inactivity probe.
1094 timeout
1095 run
1096
1097 # Idle timeout kills connection.
1098 timeout
1099 run
1100 disconnected
1101 ],
1102   [### t=1000 ###
1103 set-max-tries 1
1104   1 tries left
1105 enable
1106   in BACKOFF for 0 ms (0 ms backoff)
1107   0 tries left
1108
1109 # Connection succeeds.
1110 run
1111   should connect
1112 connected
1113   in ACTIVE for 0 ms (0 ms backoff)
1114   created 1000, last activity 1000, last connected 1000
1115   1 successful connections out of 1 attempts, seqno 1
1116   connected
1117   last connected 0 ms ago, connected 0 ms total
1118
1119 # Send inactivity probe.
1120 timeout
1121   advance 5000 ms
1122
1123 ### t=6000 ###
1124   in ACTIVE for 5000 ms (0 ms backoff)
1125 run
1126   should send probe
1127   in IDLE for 0 ms (0 ms backoff)
1128
1129 # Idle timeout kills connection.
1130 timeout
1131   advance 5000 ms
1132
1133 ### t=11000 ###
1134   in IDLE for 5000 ms (0 ms backoff)
1135 run
1136   should disconnect
1137 disconnected
1138   in VOID for 0 ms (0 ms backoff)
1139   1 successful connections out of 1 attempts, seqno 2
1140   disconnected
1141   disconnected at 11000 ms (0 ms ago)
1142 ])
1143
1144 ######################################################################
1145 RECONNECT_CHECK([max-tries of 0 honored],
1146   [set-max-tries 0
1147 enable
1148 run
1149 timeout
1150 ],
1151   [### t=1000 ###
1152 set-max-tries 0
1153   0 tries left
1154 enable
1155 run
1156 timeout
1157   no timeout
1158 ])
1159
1160 ######################################################################
1161 RECONNECT_CHECK([passive mode],
1162   [passive
1163 enable
1164
1165 # Start listening.
1166 timeout
1167 run
1168 listening
1169
1170 # Listening never times out.
1171 timeout
1172 run
1173
1174 # Listening failed (accept() returned funny error?).  Back off and try again.
1175 listen-error 0
1176 timeout
1177 run
1178 listening
1179
1180 # Connection accepted.
1181 connected
1182 activity
1183 advance 1000
1184 activity
1185
1186 # Connection times out.
1187 timeout
1188 run
1189 timeout
1190 run
1191 disconnected
1192
1193 # Start listening again.
1194 timeout
1195 run
1196 listening
1197 ],
1198   [### t=1000 ###
1199 passive
1200 enable
1201   in BACKOFF for 0 ms (0 ms backoff)
1202
1203 # Start listening.
1204 timeout
1205   advance 0 ms
1206 run
1207   should connect
1208 listening
1209   in LISTENING for 0 ms (0 ms backoff)
1210
1211 # Listening never times out.
1212 timeout
1213   no timeout
1214 run
1215
1216 # Listening failed (accept() returned funny error?).  Back off and try again.
1217 listen-error 0
1218   in BACKOFF for 0 ms (1000 ms backoff)
1219 timeout
1220   advance 1000 ms
1221
1222 ### t=2000 ###
1223   in BACKOFF for 1000 ms (1000 ms backoff)
1224 run
1225   should connect
1226 listening
1227   in LISTENING for 0 ms (1000 ms backoff)
1228
1229 # Connection accepted.
1230 connected
1231   in ACTIVE for 0 ms (1000 ms backoff)
1232   created 1000, last activity 1000, last connected 2000
1233   1 successful connections out of 1 attempts, seqno 1
1234   connected
1235   last connected 0 ms ago, connected 0 ms total
1236 activity
1237   created 1000, last activity 2000, last connected 2000
1238 advance 1000
1239
1240 ### t=3000 ###
1241   in ACTIVE for 1000 ms (1000 ms backoff)
1242 activity
1243   created 1000, last activity 3000, last connected 2000
1244
1245 # Connection times out.
1246 timeout
1247   advance 5000 ms
1248
1249 ### t=8000 ###
1250   in ACTIVE for 6000 ms (1000 ms backoff)
1251 run
1252   should send probe
1253   in IDLE for 0 ms (1000 ms backoff)
1254 timeout
1255   advance 5000 ms
1256
1257 ### t=13000 ###
1258   in IDLE for 5000 ms (1000 ms backoff)
1259 run
1260   should disconnect
1261 disconnected
1262   in BACKOFF for 0 ms (0 ms backoff)
1263   1 successful connections out of 1 attempts, seqno 2
1264   disconnected
1265   disconnected at 13000 ms (0 ms ago)
1266
1267 # Start listening again.
1268 timeout
1269   advance 0 ms
1270 run
1271   should connect
1272 listening
1273   in LISTENING for 0 ms (0 ms backoff)
1274 ])