summaryrefslogtreecommitdiffstats
path: root/src/plugins/hs_apps/vcl/vcl_test_server.c
blob: 1b3b759bfcd3413dc06a936d2afe86ba0f13e2a0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
/*
 * Copyright (c) 2017-2021 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <ctype.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <hs_apps/vcl/vcl_test.h>
#include <sys/epoll.h>
#include <vppinfra/mem.h>
#include <pthread.h>

typedef struct
{
  uint16_t port;
  uint32_t address_ip6;
  u8 proto;
  u8 workers;
  vppcom_endpt_t endpt;
} vcl_test_server_cfg_t;

typedef struct
{
  vcl_test_session_t *conn_pool;
  uint32_t wrk_index;
  int epfd;
  int conn_pool_size;
  int nfds;
  vcl_test_session_t listener;
  pthread_t thread_handle;
} vcl_test_server_worker_t;

typedef struct
{
  vcl_test_server_worker_t *workers;
  vcl_test_session_t *ctrl;
  vcl_test_server_cfg_t server_cfg;
  int ctrl_listen_fd;
  struct sockaddr_storage servaddr;
  volatile int worker_fails;
  volatile int active_workers;
  u8 use_ds;
  u8 incremental_stats;
} vcl_test_server_main_t;

vcl_test_main_t vcl_test_main;

static vcl_test_server_main_t vcl_server_main;

static inline void
conn_pool_expand (vcl_test_server_worker_t * wrk, size_t expand_size)
{
  vcl_test_session_t *conn_pool;
  size_t new_size = wrk->conn_pool_size + expand_size;
  int i;

  conn_pool = realloc (wrk->conn_pool, new_size * sizeof (*wrk->conn_pool));
  if (conn_pool)
    {
      for (i = wrk->conn_pool_size; i < new_size; i++)
	{
	  vcl_test_session_t *conn = &conn_pool[i];
	  memset (conn, 0, sizeof (*conn));
	}

      wrk->conn_pool = conn_pool;
      wrk->conn_pool_size = new_size;
    }
  else
    {
      vterr ("conn_pool_expand()", -errno);
    }
}

static inline vcl_test_session_t *
conn_pool_alloc (vcl_test_server_worker_t *wrk)
{
  vcl_test_session_t *conn;
  int i, expand = 0;

again:
  for (i = 0; i < wrk->conn_pool_size; i++)
    {
      if (!wrk->conn_pool[i].is_alloc)
	{
	  conn = &wrk->conn_pool[i];
	  memset (conn, 0, sizeof (*conn));
	  conn->endpt.ip = wrk->conn_pool[i].ip;
	  conn->is_alloc = 1;
	  conn->session_index = i;
	  vcl_test_cfg_init (&conn->cfg);
	  return (&wrk->conn_pool[i]);
	}
    }

  if (expand == 0)
    {
      conn_pool_expand (wrk, 2 * wrk->conn_pool_size);
      expand = 1;
      goto again;
    }
  vtwrn ("Failed to allocate connection even after expand");
  return 0;
}

static inline void
conn_pool_free (vcl_test_session_t *ts)
{
  ts->fd = 0;
  ts->is_alloc = 0;
  vcl_test_session_buf_free (ts);
}

static inline void
sync_config_and_reply (vcl_test_session_t *conn, vcl_test_cfg_t *rx_cfg)
{
  conn->cfg = *rx_cfg;
  vcl_test_buf_alloc (&conn->cfg, 1 /* is_rxbuf */, (uint8_t **) &conn->rxbuf,
		      &conn->rxbuf_size);
  conn->cfg.txbuf_size = conn->cfg.rxbuf_size;

  if (conn->cfg.verbose)
    {
      vtinf ("(fd %d): Replying to cfg message!\n", conn->fd);
      vcl_test_cfg_dump (&conn->cfg, 0 /* is_client */ );
    }
  (void) vcl_test_write (conn, &conn->cfg, sizeof (conn->cfg));
}

static void
vts_session_close (vcl_test_session_t *conn)
{
  vcl_test_server_main_t *vsm = &vcl_server_main;
  vcl_test_main_t *vt = &vcl_test_main;

  if (!conn->is_open)
    return;

  if (vt->protos[vsm->server_cfg.proto]->close)
    vt->protos[vsm->server_cfg.proto]->close (conn);

  vppcom_session_close (conn->fd);
  conn->is_open = 0;
}

static void
vts_session_cleanup (vcl_test_session_t *ts)
{
  vts_session_close (ts);
  conn_pool_free (ts);
}

static void
vts_wrk_cleanup_all (vcl_test_server_worker_t *wrk)
{
  vcl_test_session_t *conn;
  int i;

  for (i = 0; i < wrk->conn_pool_size; i++)
    {
      conn = &wrk->conn_pool[i];
      vts_session_cleanup (conn);
    }

  wrk->nfds = 0;
}

static void
vts_test_cmd (vcl_test_server_worker_t *wrk, vcl_test_session_t *conn,
	      vcl_test_cfg_t *rx_cfg)
{
  u8 is_bi = rx_cfg->test == VCL_TEST_TYPE_BI;
  vcl_test_session_t *tc;
  char buf[64];
  int i;

  if (rx_cfg->cmd == VCL_TEST_CMD_STOP)
    {
      struct timespec stop;
      clock_gettime (CLOCK_REALTIME, &stop);

      /* Test session are not closed, e.g., connection-less or errors */
      if (wrk->nfds > 1)
	{
	  vtinf ("%u sessions are still open", wrk->nfds - 1);
	  stop.tv_sec -= VCL_TEST_DELAY_DISCONNECT;
	  conn->stats.stop = stop;
	}

      /* Accumulate stats over all of the worker's sessions */
      for (i = 0; i < wrk->conn_pool_size; i++)
	{
	  tc = &wrk->conn_pool[i];
	  if (tc == conn)
	    continue;

	  vcl_test_stats_accumulate (&conn->stats, &tc->stats);
	  if (tc->is_open)
	    {
	      vts_session_cleanup (tc);
	      continue;
	    }
	  /* Only relevant if all connections previously closed */
	  if (vcl_comp_tspec (&conn->stats.stop, &tc->stats.stop) < 0)
	    conn->stats.stop = tc->stats.stop;
	}

      if (conn->cfg.verbose)
	{
	  snprintf (buf, sizeof (buf), "SERVER (fd %d) RESULTS", conn->fd);
	  vcl_test_stats_dump (buf, &conn->stats, 1 /* show_rx */,
			       is_bi /* show tx */, conn->cfg.verbose);
	}

      vcl_test_stats_dump ("SERVER RESULTS", &conn->stats, 1 /* show_rx */ ,
			   is_bi /* show_tx */ , conn->cfg.verbose);
      vcl_test_cfg_dump (&conn->cfg, 0 /* is_client */ );
      if (conn->cfg.verbose)
	{
	  vtinf ("  vcl server main\n" VCL_TEST_SEPARATOR_STRING
		 "       buf:  %p\n"
		 "  buf size:  %u (0x%08x)\n" VCL_TEST_SEPARATOR_STRING,
		 conn->rxbuf, conn->rxbuf_size, conn->rxbuf_size);
	}

      sync_config_and_reply (conn, rx_cfg);
      memset (&conn->stats, 0, sizeof (conn->stats));
    }
  else if (rx_cfg->cmd == VCL_TEST_CMD_SYNC)
    {
      rx_cfg->ctrl_handle = conn->fd;
      vtinf ("Set control fd %d for test!", conn->fd);
      sync_config_and_reply (conn, rx_cfg);
    }
  else if (rx_cfg->cmd == VCL_TEST_CMD_START)
    {
      vtinf ("Starting %s-directional Stream Test (fd %d)!",
	     is_bi ? "Bi" : "Uni", conn->fd);
      rx_cfg->ctrl_handle = conn->fd;
      sync_config_and_reply (conn, rx_cfg);

      /* read the 1st chunk, record start time */
      memset (&conn->stats, 0, sizeof (conn->stats));
      clock_gettime (CLOCK_REALTIME, &conn->stats.start);
    }
}

static inline void
vts_server_process_rx (vcl_test_session_t *conn, int rx_bytes)
{
  vcl_test_server_main_t *vsm = &vcl_server_main;

  if (conn->cfg.test == VCL_TEST_TYPE_BI)
    {
      if (vsm->use_ds)
	{
	  (void) vcl_test_write (conn, conn->ds[0].data, conn->ds[0].len);
	  if (conn->ds[1].len)
	    (void) vcl_test_write (conn, conn->ds[1].data, conn->ds[1].len);
	}
      else
	(void) vcl_test_write (conn, conn->rxbuf, rx_bytes);
    }

  if (vsm->use_ds)
    vppcom_session_free_segments (conn->fd, rx_bytes);

  if (conn->stats.rx_bytes >= conn->cfg.total_bytes)
    clock_gettime (CLOCK_REALTIME, &conn->stats.stop);
}

static void
vts_server_echo (vcl_test_session_t *conn, int rx_bytes)
{
  int tx_bytes, nbytes, pos;

  /* If it looks vaguely like a string, make sure it's terminated */
  pos = rx_bytes < conn->rxbuf_size ? rx_bytes : conn->rxbuf_size - 1;
  ((char *) conn->rxbuf)[pos] = 0;
  vtinf ("(fd %d): RX (%d bytes) - '%s'", conn->fd, rx_bytes, conn->rxbuf);

  if (conn->cfg.verbose)
    vtinf ("(fd %d): Echoing back", conn->fd);

  nbytes = strlen ((const char *) conn->rxbuf) + 1;
  tx_bytes = conn->write (conn, conn->rxbuf, nbytes);
  if (tx_bytes >= 0)
    vtinf ("(fd %d): TX (%d bytes) - '%s'", conn->fd, tx_bytes, conn->rxbuf);
}

static vcl_test_session_t *
vts_accept_ctrl (vcl_test_server_worker_t *wrk, int listen_fd)
{
  vcl_test_server_main_t *vsm = &vcl_server_main;
  const vcl_test_proto_vft_t *tp;
  vcl_test_session_t *conn;
  struct epoll_event ev;
  int rv;

  conn = conn_pool_alloc (wrk);
  if (!conn)
    {
      vtwrn ("No free connections!");
      return 0;
    }

  if (vsm->ctrl)
    conn->cfg = vsm->ctrl->cfg;
  vcl_test_session_buf_alloc (conn);
  clock_gettime (CLOCK_REALTIME, &conn->old_stats.stop);

  tp = vcl_test_main.protos[VPPCOM_PROTO_TCP];
  if (tp->accept (listen_fd, conn))
    return 0;

  vtinf ("CTRL accepted fd = %d (0x%08x) on listener fd = %d (0x%08x)",
	 conn->fd, conn->fd, listen_fd, listen_fd);

  ev.events = EPOLLET | EPOLLIN;
  ev.data.u64 = conn - wrk->conn_pool;
  rv = vppcom_epoll_ctl (wrk->epfd, EPOLL_CTL_ADD, conn->fd, &ev);
  if (rv < 0)
    {
      vterr ("vppcom_epoll_ctl()", rv);
      return 0;
    }

  wrk->nfds++;

  return conn;
}

static vcl_test_session_t *
vts_accept_client (vcl_test_server_worker_t *wrk, int listen_fd)
{
  vcl_test_server_main_t *vsm = &vcl_server_main;
  const vcl_test_proto_vft_t *tp;
  vcl_test_session_t *conn;
  struct epoll_event ev;
  int rv;

  conn = conn_pool_alloc (wrk);
  if (!conn)
    {
      vtwrn ("No free connections!");
      return 0;
    }

  if (vsm->ctrl)
    conn->cfg = vsm->ctrl->cfg;
  vcl_test_session_buf_alloc (conn);
  clock_gettime (CLOCK_REALTIME, &conn->old_stats.stop);

  tp = vcl_test_main.protos[vsm->server_cfg.proto];
  if (tp->accept (listen_fd, conn))
    return 0;

  vtinf ("Got a connection -- fd = %d (0x%08x) on listener fd = %d (0x%08x)",
	 conn->fd, conn->fd, listen_fd, listen_fd);

  ev.events = EPOLLET | EPOLLIN;
  ev.data.u64 = conn - wrk->conn_pool;
  rv = vppcom_epoll_ctl (wrk->epfd, EPOLL_CTL_ADD, conn->fd, &ev);
  if (rv < 0)
    {
      vterr ("vppcom_epoll_ctl()", rv);
      return 0;
    }
  wrk->nfds++;

  return conn;
}

static void
print_usage_and_exit (void)
{
  fprintf (stderr, "vcl_test_server [OPTIONS] <port>\n"
		   "  OPTIONS\n"
		   "  -h               Print this message and exit.\n"
		   "  -6               Use IPv6\n"
		   "  -w <num>         Number of workers\n"
		   "  -p <PROTO>       Use <PROTO> transport layer\n"
		   "  -D               Use UDP transport layer\n"
		   "  -L               Use TLS transport layer\n"
		   "  -S	       Incremental stats\n");
  exit (1);
}

static void
vcl_test_init_endpoint_addr (vcl_test_server_main_t * vsm)
{
  struct sockaddr_storage *servaddr = &vsm->servaddr;
  memset (servaddr, 0, sizeof (*servaddr));

  if (vsm->server_cfg.address_ip6)
    {
      struct sockaddr_in6 *server_addr = (struct sockaddr_in6 *) servaddr;
      server_addr->sin6_family = AF_INET6;
      server_addr->sin6_addr = in6addr_any;
      server_addr->sin6_port = htons (vsm->server_cfg.port);
    }
  else
    {
      struct sockaddr_in *server_addr = (struct sockaddr_in *) servaddr;
      server_addr->sin_family = AF_INET;
      server_addr->sin_addr.s_addr = htonl (INADDR_ANY);
      server_addr->sin_port = htons (vsm->server_cfg.port);
    }

  if (vsm->server_cfg.address_ip6)
    {
      struct sockaddr_in6 *server_addr = (struct sockaddr_in6 *) servaddr;
      vsm->server_cfg.endpt.is_ip4 = 0;
      vsm->server_cfg.endpt.ip = (uint8_t *) &server_addr->sin6_addr;
      vsm->server_cfg.endpt.port = (uint16_t) server_addr->sin6_port;
    }
  else
    {
      struct sockaddr_in *server_addr = (struct sockaddr_in *) servaddr;
      vsm->server_cfg.endpt.is_ip4 = 1;
      vsm->server_cfg.endpt.ip = (uint8_t *) &server_addr->sin_addr;
      vsm->server_cfg.endpt.port = (uint16_t) server_addr->sin_port;
    }
}

static void
vcl_test_server_process_opts (vcl_test_server_main_t * vsm, int argc,
			      char **argv)
{
  int v, c;

  vsm->server_cfg.proto = VPPCOM_PROTO_TCP;

  opterr = 0;
  while ((c = getopt (argc, argv, "6DLsw:hp:S")) != -1)
    switch (c)
      {
      case '6':
	vsm->server_cfg.address_ip6 = 1;
	break;

      case 'p':
	if (vppcom_unformat_proto (&vsm->server_cfg.proto, optarg))
	  vtwrn ("Invalid vppcom protocol %s, defaulting to TCP", optarg);
	break;

      case 'D':
	vsm->server_cfg.proto = VPPCOM_PROTO_UDP;
	break;

      case 'L':
	vsm->server_cfg.proto = VPPCOM_PROTO_TLS;
	break;

      case 'w':
	v = atoi (optarg);
	if (v > 1)
	  vsm->server_cfg.workers = v;
	else
	  vtwrn ("Invalid number of workers %d", v);
	break;
      case 's':
	vsm->use_ds = 1;
	break;
      case 'S':
	vsm->incremental_stats = 1;
	break;
      case '?':
	switch (optopt)
	  {
	  case 'w':
	  case 'p':
	    vtwrn ("Option `-%c' requires an argument.", optopt);
	    break;
	  default:
	    if (isprint (optopt))
	      vtwrn ("Unknown option `-%c'.", optopt);
	    else
	      vtwrn ("Unknown option character `\\x%x'.", optopt);
	  }
	/* fall thru */
      case 'h':
      default:
	print_usage_and_exit ();
      }

  if (argc > (optind + 1))
    {
      fprintf (stderr, "Incorrect number of arguments!\n");
      print_usage_and_exit ();
    }
  else if (argc > 1 && argc == (optind + 1))
    {
      if (sscanf (argv[optind], "%d", &v) == 1)
	vsm->server_cfg.port = (uint16_t) v;
      else
	{
	  fprintf (stderr, "Invalid port (%s)!\n", argv[optind]);
	  print_usage_and_exit ();
	}
    }

  vcl_test_init_endpoint_addr (vsm);
}

int
vts_handle_ctrl_cfg (vcl_test_server_worker_t *wrk, vcl_test_cfg_t *rx_cfg,
		     vcl_test_session_t *conn, int rx_bytes)
{
  if (rx_cfg->verbose)
    {
      vtinf ("(fd %d): Received a cfg msg!", conn->fd);
      vcl_test_cfg_dump (rx_cfg, 0 /* is_client */ );
    }

  if (rx_bytes != sizeof (*rx_cfg))
    {
      vtinf ("(fd %d): Invalid cfg msg size %d expected %lu!", conn->fd,
	     rx_bytes, sizeof (*rx_cfg));
      conn->cfg.rxbuf_size = 0;
      conn->cfg.num_writes = 0;
      if (conn->cfg.verbose)
	{
	  vtinf ("(fd %d): Replying to cfg msg", conn->fd);
	  vcl_test_cfg_dump (rx_cfg, 0 /* is_client */ );
	}
      conn->write (conn, &conn->cfg, sizeof (conn->cfg));
      return -1;
    }

  switch (rx_cfg->test)
    {
    case VCL_TEST_TYPE_NONE:
    case VCL_TEST_TYPE_ECHO:
      sync_config_and_reply (conn, rx_cfg);
      break;

    case VCL_TEST_TYPE_BI:
    case VCL_TEST_TYPE_UNI:
      vts_test_cmd (wrk, conn, rx_cfg);
      break;

    case VCL_TEST_TYPE_EXIT:
      vtinf ("Ctrl session fd %d closing!", conn->fd);
      vts_session_cleanup (conn);
      wrk->nfds--;
      if (wrk->nfds)
	vts_wrk_cleanup_all (wrk);
      vcl_server_main.ctrl = 0;
      break;

    default:
      vtwrn ("Unknown test type %d", rx_cfg->test);
      vcl_test_cfg_dump (rx_cfg, 0 /* is_client */ );
      break;
    }

  return 0;
}

static void
vts_worker_init (vcl_test_server_worker_t * wrk)
{
  vcl_test_server_main_t *vsm = &vcl_server_main;
  vcl_test_main_t *vt = &vcl_test_main;
  const vcl_test_proto_vft_t *tp;
  struct epoll_event listen_ev;
  int rv;

  __wrk_index = wrk->wrk_index;

  vtinf ("Initializing worker ...");

  conn_pool_expand (wrk, VCL_TEST_CFG_MAX_TEST_SESS + 1);
  if (wrk->wrk_index)
    if (vppcom_worker_register ())
      vtfail ("vppcom_worker_register()", 1);

  tp = vt->protos[vsm->server_cfg.proto];
  if ((rv = tp->listen (&wrk->listener, &vsm->server_cfg.endpt)))
    vtfail ("proto listen", rv);

  /* First worker already has epoll fd */
  if (wrk->wrk_index)
    {
      wrk->epfd = vppcom_epoll_create ();
      if (wrk->epfd < 0)
	vtfail ("vppcom_epoll_create()", wrk->epfd);
    }

  listen_ev.events = EPOLLET | EPOLLIN;
  listen_ev.data.u32 = VCL_TEST_DATA_LISTENER;
  rv =
    vppcom_epoll_ctl (wrk->epfd, EPOLL_CTL_ADD, wrk->listener.fd, &listen_ev);
  if (rv < 0)
    vtfail ("vppcom_epoll_ctl", rv);

  vsm->active_workers += 1;
  vtinf ("Waiting for client data connections on port %d ...",
	 ntohs (vsm->server_cfg.endpt.port));
}

static inline int
vts_conn_read (vcl_test_session_t *conn)
{
  vcl_test_server_main_t *vsm = &vcl_server_main;
  if (vsm->use_ds)
    return vcl_test_read_ds (conn);
  else
    return conn->read (conn, conn->rxbuf, conn->rxbuf_size);
}

static void
vts_inc_stats_check (vcl_test_session_t *ts)
{
  /* Avoid checking time too often because of syscall cost */
  if (ts->stats.rx_bytes - ts->old_stats.rx_bytes < 1 << 20)
    return;

  clock_gettime (CLOCK_REALTIME, &ts->stats.stop);
  if (vcl_test_time_diff (&ts->old_stats.stop, &ts->stats.stop) > 1)
    {
      vcl_test_stats_dump_inc (ts, 1 /* is_rx */);
      ts->old_stats = ts->stats;
    }
}

static void *
vts_worker_loop (void *arg)
{
  struct epoll_event ep_evts[VCL_TEST_CFG_MAX_EPOLL_EVENTS];
  vcl_test_server_main_t *vsm = &vcl_server_main;
  vcl_test_server_worker_t *wrk = arg;
  vcl_test_session_t *conn;
  int i, rx_bytes, num_ev;
  vcl_test_cfg_t *rx_cfg;

  if (wrk->wrk_index)
    vts_worker_init (wrk);

  while (1)
    {
      num_ev =
	vppcom_epoll_wait (wrk->epfd, ep_evts, VCL_TEST_CFG_MAX_EPOLL_EVENTS,
			   0 /* poll session events */);
      if (num_ev < 0)
	{
	  vterr ("vppcom_epoll_wait()", num_ev);
	  goto fail;
	}
      else if (num_ev == 0)
	{
	  continue;
	}
      for (i = 0; i < num_ev; i++)
	{
	  conn = &wrk->conn_pool[ep_evts[i].data.u32];
	  /*
	   * Check for close events
	   */
	  if (ep_evts[i].events & (EPOLLHUP | EPOLLRDHUP))
	    {
	      if (conn == vsm->ctrl)
		{
		  vtinf ("ctrl session went away");
		  vsm->ctrl = 0;
		}
	      vts_session_cleanup (conn);
	      wrk->nfds--;
	      continue;
	    }

	  /*
	   * Check if new session needs to be accepted
	   */

	  if (!wrk->wrk_index && ep_evts[i].data.u32 == VCL_TEST_CTRL_LISTENER)
	    {
	      if (vsm->ctrl)
		{
		  vtwrn ("ctrl already exists");
		  continue;
		}
	      vsm->ctrl = vts_accept_ctrl (wrk, vsm->ctrl_listen_fd);
	      continue;
	    }
	  if (ep_evts[i].data.u32 == VCL_TEST_DATA_LISTENER)
	    {
	      conn = vts_accept_client (wrk, wrk->listener.fd);
	      conn->cfg = vsm->ctrl->cfg;
	      continue;
	    }
	  else if (vppcom_session_is_connectable_listener (conn->fd))
	    {
	      vts_accept_client (wrk, conn->fd);
	      continue;
	    }

	  /*
	   * Message on control session
	   */

	  if (!wrk->wrk_index && conn->fd == vsm->ctrl->fd)
	    {
	      rx_bytes = conn->read (conn, conn->rxbuf, conn->rxbuf_size);
	      rx_cfg = (vcl_test_cfg_t *) conn->rxbuf;
	      if (rx_cfg->magic == VCL_TEST_CFG_CTRL_MAGIC)
		{
		  vts_handle_ctrl_cfg (wrk, rx_cfg, conn, rx_bytes);
		  if (!wrk->nfds)
		    {
		      vtinf ("All client connections closed\n");
		      goto done;
		    }
		}
	      else if (isascii (conn->rxbuf[0]))
		{
		  vts_server_echo (conn, rx_bytes);
		}
	      else
		{
		  vtwrn ("FIFO not drained! extra bytes %d", rx_bytes);
		}
	      continue;
	    }

	  /*
	   * Read perf test data
	   */

	  if (EPOLLIN & ep_evts[i].events)
	    {
	    read_again:
	      rx_bytes = vts_conn_read (conn);

	      if (rx_bytes <= 0)
		{
		  if (errno == ECONNRESET)
		    {
		      vtinf ("Connection reset by remote peer.\n");
		      goto fail;
		    }
		  else
		    continue;
		}
	      vts_server_process_rx (conn, rx_bytes);
	      if (vppcom_session_attr (conn->fd, VPPCOM_ATTR_GET_NREAD, 0, 0) >
		  0)
		goto read_again;
	      if (vsm->incremental_stats)
		vts_inc_stats_check (conn);
	      continue;
	    }
	  else
	    {
	      vtwrn ("Unhandled event");
	      goto fail;
	    }
	}
    }

fail:
  vsm->worker_fails -= 1;

done:
  vppcom_session_close (wrk->listener.fd);
  if (wrk->conn_pool)
    free (wrk->conn_pool);
  vsm->active_workers -= 1;
  return 0;
}

static void
vts_ctrl_session_init (vcl_test_server_worker_t *wrk)
{
  vcl_test_server_main_t *vsm = &vcl_server_main;
  struct epoll_event listen_ev;
  int rv;

  vtinf ("Initializing main ctrl session ...");

  vsm->ctrl_listen_fd =
    vppcom_session_create (VPPCOM_PROTO_TCP, 0 /* is_nonblocking */);
  if (vsm->ctrl_listen_fd < 0)
    vtfail ("vppcom_session_create()", vsm->ctrl_listen_fd);

  rv = vppcom_session_bind (vsm->ctrl_listen_fd, &vsm->server_cfg.endpt);
  if (rv < 0)
    vtfail ("vppcom_session_bind()", rv);

  rv = vppcom_session_listen (vsm->ctrl_listen_fd, 10);
  if (rv < 0)
    vtfail ("vppcom_session_listen()", rv);

  wrk->epfd = vppcom_epoll_create ();
  if (wrk->epfd < 0)
    vtfail ("vppcom_epoll_create()", wrk->epfd);

  listen_ev.events = EPOLLET | EPOLLIN;
  listen_ev.data.u32 = VCL_TEST_CTRL_LISTENER;
  rv = vppcom_epoll_ctl (wrk->epfd, EPOLL_CTL_ADD, vsm->ctrl_listen_fd,
			 &listen_ev);
  if (rv < 0)
    vtfail ("vppcom_epoll_ctl", rv);

  vtinf ("Waiting for client ctrl connection on port %d ...",
	 vsm->server_cfg.port);
}

int
main (int argc, char **argv)
{
  vcl_test_server_main_t *vsm = &vcl_server_main;
  vcl_test_main_t *vt = &vcl_test_main;
  int rv, i;

  clib_mem_init_thread_safe (0, 64 << 20);
  vsm->server_cfg.port = VCL_TEST_SERVER_PORT;
  vsm->server_cfg.workers = 1;
  vsm->active_workers = 0;
  vcl_test_server_process_opts (vsm, argc, argv);

  rv = vppcom_app_create ("vcl_test_server");
  if (rv)
    vtfail ("vppcom_app_create()", rv);

  /* Protos like tls/dtls/quic need init */
  if (vt->protos[vsm->server_cfg.proto]->init)
    vt->protos[vsm->server_cfg.proto]->init (0);

  vsm->workers = calloc (vsm->server_cfg.workers, sizeof (*vsm->workers));
  vts_ctrl_session_init (&vsm->workers[0]);

  /* Update ctrl port to data port */
  vsm->server_cfg.endpt.port += 1;
  vts_worker_init (&vsm->workers[0]);
  for (i = 1; i < vsm->server_cfg.workers; i++)
    {
      vsm->workers[i].wrk_index = i;
      rv = pthread_create (&vsm->workers[i].thread_handle, NULL,
			   vts_worker_loop, (void *) &vsm->workers[i]);
    }

  vts_worker_loop (&vsm->workers[0]);

  while (vsm->active_workers > 0)
    ;

  vppcom_app_destroy ();
  free (vsm->workers);

  return vsm->worker_fails;
}

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */