tests/reconnect.at

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