summaryrefslogtreecommitdiffstats
path: root/VNFs/DPPD-PROX/main.c
blob: 59a169d8c41d4a8f56dc7171f604e79d1ae4e296 (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
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
/*
// Copyright (c) 2010-2017 Intel Corporation
//
// 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 <string.h>
#include <locale.h>
#include <unistd.h>
#include <signal.h>

#include <rte_cycles.h>
#include <rte_atomic.h>
#include <rte_table_hash.h>
#include <rte_memzone.h>
#include <rte_errno.h>

#include "prox_malloc.h"
#include "run.h"
#include "main.h"
#include "log.h"
#include "quit.h"
#include "clock.h"
#include "defines.h"
#include "version.h"
#include "prox_args.h"
#include "prox_assert.h"
#include "prox_cfg.h"
#include "prox_shared.h"
#include "prox_port_cfg.h"
#include "toeplitz.h"
#include "hash_utils.h"
#include "handle_lb_net.h"
#include "prox_cksum.h"
#include "thread_nop.h"
#include "thread_generic.h"
#include "thread_pipeline.h"
#include "cqm.h"
#include "handle_master.h"

#if RTE_VERSION < RTE_VERSION_NUM(1,8,0,0)
#define RTE_CACHE_LINE_SIZE CACHE_LINE_SIZE
#endif

uint8_t lb_nb_txrings = 0xff;
struct rte_ring *ctrl_rings[RTE_MAX_LCORE*MAX_TASKS_PER_CORE];

static void __attribute__((noreturn)) prox_usage(const char *prgname)
{
	plog_info("\nUsage: %s [-f CONFIG_FILE] [-a|-e] [-m|-s|-i] [-w DEF] [-u] [-t]\n"
		  "\t-f CONFIG_FILE : configuration file to load, ./prox.cfg by default\n"
		  "\t-l LOG_FILE : log file name, ./prox.log by default\n"
		  "\t-p : include PID in log file name if default log file is used\n"
		  "\t-o DISPLAY: Set display to use, can be 'curses' (default), 'cli' or 'none'\n"
		  "\t-v verbosity : initial logging verbosity\n"
		  "\t-a : autostart all cores (by default)\n"
		  "\t-e : don't autostart\n"
		  "\t-n : Create NULL devices instead of using PCI devices, useful together with -i\n"
		  "\t-m : list supported task modes and exit\n"
		  "\t-s : check configuration file syntax and exit\n"
		  "\t-i : check initialization sequence and exit\n"
		  "\t-u : Listen on UDS /tmp/prox.sock\n"
		  "\t-t : Listen on TCP port 8474\n"
		  "\t-q : Pass argument to Lua interpreter, useful to define variables\n"
		  "\t-w : define variable using syntax varname=value\n"
		  "\t     takes precedence over variables defined in CONFIG_FILE\n"
		  "\t-k : Log statistics to file \"stats_dump\" in current directory\n"
		  "\t-d : Run as daemon, the parent process will block until PROX is not initialized\n"
		  "\t-z : Ignore CPU topology, implies -i\n"
		  "\t-r : Change initial screen refresh rate. If set to a lower than 0.001 seconds,\n"
		  "\t	  screen refreshing will be disabled\n"
		  , prgname);
	exit(EXIT_FAILURE);
}

static void check_mixed_normal_pipeline(void)
{
	struct lcore_cfg *lconf = NULL;
	uint32_t lcore_id = -1;

	while (prox_core_next(&lcore_id, 0) == 0) {
		lconf = &lcore_cfg[lcore_id];

		int all_thread_nop = 1;
		int generic = 0;
		int pipeline = 0;
		int l3 = 0;
		for (uint8_t task_id = 0; task_id < lconf->n_tasks_all; ++task_id) {
			struct task_args *targ = &lconf->targs[task_id];
			l3 = !strcmp("l3", targ->sub_mode_str);
			all_thread_nop = all_thread_nop && !l3 &&
				targ->task_init->thread_x == thread_nop;

			pipeline = pipeline || targ->task_init->thread_x == thread_pipeline;
			generic = generic || targ->task_init->thread_x == thread_generic || l3;
		}
		PROX_PANIC(generic && pipeline, "Can't run both pipeline and normal thread on same core\n");

		if (all_thread_nop)
			lconf->thread_x = thread_nop;
		else {
			lconf->thread_x = thread_generic;
		}
	}
}

static void check_zero_rx(void)
{
	struct lcore_cfg *lconf = NULL;
	struct task_args *targ;

	while (core_targ_next(&lconf, &targ, 0) == 0) {
		if (targ->nb_rxports != 0) {
			PROX_PANIC(task_init_flag_set(targ->task_init, TASK_FEATURE_NO_RX),
			   "\tCore %u task %u: rx_ports configured while mode %s does not use it\n", lconf->id, targ->id, targ->task_init->mode_str);
		}
	}
}

static void check_missing_rx(void)
{
	struct lcore_cfg *lconf = NULL, *rx_lconf = NULL, *tx_lconf = NULL;
	struct task_args *targ, *rx_targ = NULL, *tx_targ = NULL;
	struct prox_port_cfg *port;
	uint8_t port_id, rx_port_id, ok;

	while (core_targ_next(&lconf, &targ, 0) == 0) {
		PROX_PANIC((targ->flags & TASK_ARG_RX_RING) && targ->rx_rings[0] == 0 && !targ->tx_opt_ring_task,
			   "Configuration Error - Core %u task %u Receiving from ring, but nobody xmitting to this ring\n", lconf->id, targ->id);
		if (targ->nb_rxports == 0 && targ->nb_rxrings == 0) {
			PROX_PANIC(!task_init_flag_set(targ->task_init, TASK_FEATURE_NO_RX),
				   "\tCore %u task %u: no rx_ports and no rx_rings configured while required by mode %s\n", lconf->id, targ->id, targ->task_init->mode_str);
		}
	}

	lconf = NULL;
	while (core_targ_next(&lconf, &targ, 0) == 0) {
		if (strcmp(targ->sub_mode_str, "l3") != 0)
			continue;

		PROX_PANIC((targ->nb_rxports == 0) && (targ->nb_txports == 0), "L3 task must have a RX or a TX port\n");
		// If the L3 sub_mode receives from a port, check that there is at least one core/task
		// transmitting to this port in L3 sub_mode
		for (uint8_t i = 0; i < targ->nb_rxports; ++i) {
			rx_port_id = targ->rx_port_queue[i].port;
			ok = 0;
			tx_lconf = NULL;
			while (core_targ_next(&tx_lconf, &tx_targ, 0) == 0) {
				if ((port_id = tx_targ->tx_port_queue[0].port) == OUT_DISCARD)
					continue;
				if ((rx_port_id == port_id) && (tx_targ->flags & TASK_ARG_L3)){
					ok = 1;
					break;
				}
			}
			PROX_PANIC(ok == 0, "RX L3 sub mode for port %d on core %d task %d, but no core/task transmitting on that port\n", rx_port_id, lconf->id, targ->id);
		}

		// If the L3 sub_mode transmits to a port, check that there is at least one core/task
		// receiving from that port in L3 sub_mode.
		if ((port_id = targ->tx_port_queue[0].port) == OUT_DISCARD)
			continue;
		rx_lconf = NULL;
		ok = 0;
		plog_info("\tCore %d task %d transmitting to port %d in L3 mode\n", lconf->id, targ->id, port_id);
		while (core_targ_next(&rx_lconf, &rx_targ, 0) == 0) {
			for (uint8_t i = 0; i < rx_targ->nb_rxports; ++i) {
				rx_port_id = rx_targ->rx_port_queue[i].port;
				if ((rx_port_id == port_id) && (rx_targ->flags & TASK_ARG_L3)){
					ok = 1;
					break;
				}
			}
			if (ok == 1) {
				plog_info("\tCore %d task %d has found core %d task %d receiving from port %d\n", lconf->id, targ->id, rx_lconf->id, rx_targ->id, port_id);
				break;
			}
		}
		PROX_PANIC(ok == 0, "L3 sub mode for port %d on core %d task %d, but no core/task receiving on that port\n", port_id, lconf->id, targ->id);
	}
}

static void check_cfg_consistent(void)
{
	check_missing_rx();
	check_zero_rx();
	check_mixed_normal_pipeline();
}

static void plog_all_rings(void)
{
	struct lcore_cfg *lconf = NULL;
	struct task_args *targ;

	while (core_targ_next(&lconf, &targ, 0) == 0) {
		for (uint8_t ring_idx = 0; ring_idx < targ->nb_rxrings; ++ring_idx) {
			plog_info("\tCore %u, task %u, rx_ring[%u] %p\n", lconf->id, targ->id, ring_idx, targ->rx_rings[ring_idx]);
		}
	}
}

static int chain_flag_state(struct task_args *targ, uint64_t flag, int is_set)
{
	if (task_init_flag_set(targ->task_init, flag) == is_set)
		return 1;

	int ret = 0;

	for (uint32_t i = 0; i < targ->n_prev_tasks; ++i) {
		ret = chain_flag_state(targ->prev_tasks[i], flag, is_set);
		if (ret)
			return 1;
	}
	return 0;
}

static void configure_if_tx_queues(struct task_args *targ, uint8_t socket)
{
	uint8_t if_port;

	for (uint8_t i = 0; i < targ->nb_txports; ++i) {
		if_port = targ->tx_port_queue[i].port;

		PROX_PANIC(if_port == OUT_DISCARD, "port misconfigured, exiting\n");

		PROX_PANIC(!prox_port_cfg[if_port].active, "\tPort %u not used, skipping...\n", if_port);

		int dsocket = prox_port_cfg[if_port].socket;
		if (dsocket != -1 && dsocket != socket) {
			plog_warn("TX core on socket %d while device on socket %d\n", socket, dsocket);
		}

		if (prox_port_cfg[if_port].tx_ring[0] == '\0') {  // Rings-backed port can use single queue
			targ->tx_port_queue[i].queue = prox_port_cfg[if_port].n_txq;
			prox_port_cfg[if_port].n_txq++;
		} else {
			prox_port_cfg[if_port].n_txq = 1;
			targ->tx_port_queue[i].queue = 0;
		}
		/* Set the ETH_TXQ_FLAGS_NOREFCOUNT flag if none of
		   the tasks up to the task transmitting to the port
		   use refcnt. */
		if (!chain_flag_state(targ, TASK_FEATURE_TXQ_FLAGS_REFCOUNT, 1)) {
			prox_port_cfg[if_port].tx_conf.txq_flags |= ETH_TXQ_FLAGS_NOREFCOUNT;
			plog_info("\t\tEnabling No refcnt on port %d\n", if_port);
		}
		else {
			plog_info("\t\tRefcnt used on port %d\n", if_port);
		}

		/* By default OFFLOAD is enabled, but if the whole
		   chain has NOOFFLOADS set all the way until the
		   first task that receives from a port, it will be
		   disabled for the destination port. */
		if (!chain_flag_state(targ, TASK_FEATURE_TXQ_FLAGS_NOOFFLOADS, 0)) {
			prox_port_cfg[if_port].tx_conf.txq_flags |= ETH_TXQ_FLAGS_NOOFFLOADS;
			plog_info("\t\tDisabling TX offloads on port %d\n", if_port);
		} else {
			plog_info("\t\tEnabling TX offloads on port %d\n", if_port);
		}

		/* By default NOMULTSEGS is disabled, as drivers/NIC might split packets on RX
		   It should only be enabled when we know for sure that the RX does not split packets.
		   Set the ETH_TXQ_FLAGS_NOMULTSEGS flag if all of the tasks up to the task
		   transmitting to the port use no_multsegs. */
		if (!chain_flag_state(targ, TASK_FEATURE_TXQ_FLAGS_NOMULTSEGS, 0)) {
			prox_port_cfg[if_port].tx_conf.txq_flags |= ETH_TXQ_FLAGS_NOMULTSEGS;
			plog_info("\t\tEnabling No MultiSegs on port %d\n", if_port);
		}
		else {
			plog_info("\t\tMultiSegs used on port %d\n", if_port);
		}
	}
}

static void configure_if_rx_queues(struct task_args *targ, uint8_t socket)
{
	struct prox_port_cfg *port;
	for (int i = 0; i < targ->nb_rxports; i++) {
		uint8_t if_port = targ->rx_port_queue[i].port;

		if (if_port == OUT_DISCARD) {
			return;
		}

		PROX_PANIC(!prox_port_cfg[if_port].active, "Port %u not used, aborting...\n", if_port);
		port = &prox_port_cfg[if_port];

		if(port->rx_ring[0] != '\0') {
			port->n_rxq = 0;
		}

		// Force multi segment support if mbuf size is not big enough.
		// This is usually the case when setting a big mtu size i.e. enabling jumbo frames.
		uint16_t max_frame_size = port->mtu + ETHER_HDR_LEN + ETHER_CRC_LEN + 2 * PROX_VLAN_TAG_SIZE;
		if (max_frame_size + sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM > targ->mbuf_size) {
			targ->task_init->flag_features &= ~TASK_FEATURE_TXQ_FLAGS_NOMULTSEGS;
			plog_info("\t\tDisabling No MultSegs on port %u as %lu > %u\n", if_port, max_frame_size + sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM, targ->mbuf_size);
		}
		targ->rx_port_queue[i].queue = prox_port_cfg[if_port].n_rxq;
		port->pool[targ->rx_port_queue[i].queue] = targ->pool;
		port->pool_size[targ->rx_port_queue[i].queue] = targ->nb_mbuf - 1;
		port->n_rxq++;

		int dsocket = prox_port_cfg[if_port].socket;
		if (dsocket != -1 && dsocket != socket) {
			plog_warn("RX core on socket %d while device on socket %d\n", socket, dsocket);
		}
	}
}

static void configure_if_queues(void)
{
	struct lcore_cfg *lconf = NULL;
	struct task_args *targ;
	uint8_t socket;

	while (core_targ_next(&lconf, &targ, 0) == 0) {
		socket = rte_lcore_to_socket_id(lconf->id);

		configure_if_rx_queues(targ, socket);
		configure_if_tx_queues(targ, socket);
	}
}

static const char *gen_ring_name(void)
{
	static char retval[] = "XX";
	static const char* ring_names =
		"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
		"abcdefghijklmnopqrstuvwxyz"
		"[\\]^_`!\"#$%&'()*+,-./:;<="
		">?@{|}0123456789";
	static int idx2 = 0;

	int idx = idx2;

	retval[0] = ring_names[idx % strlen(ring_names)];
	idx /= strlen(ring_names);
	retval[1] = idx ? ring_names[(idx - 1) % strlen(ring_names)] : 0;

	idx2++;

	return retval;
}

struct ring_init_stats {
	uint32_t n_pkt_rings;
	uint32_t n_ctrl_rings;
	uint32_t n_opt_rings;
};

static uint32_t ring_init_stats_total(const struct ring_init_stats *ris)
{
	return ris->n_pkt_rings + ris->n_ctrl_rings + ris->n_opt_rings;
}

static uint32_t count_incoming_tasks(uint32_t lcore_worker, uint32_t dest_task)
{
	struct lcore_cfg *lconf = NULL;
	struct task_args *targ;
	uint32_t ret = 0;
	struct core_task ct;

	while (core_targ_next(&lconf, &targ, 0) == 0) {
		for (uint8_t idxx = 0; idxx < MAX_PROTOCOLS; ++idxx) {
			for (uint8_t ridx = 0; ridx < targ->core_task_set[idxx].n_elems; ++ridx) {
				ct = targ->core_task_set[idxx].core_task[ridx];

				if (dest_task == ct.task && lcore_worker == ct.core)
					ret++;
			}
		}
	}
	return ret;
}

static struct rte_ring *get_existing_ring(uint32_t lcore_id, uint32_t task_id)
{
	if (!prox_core_active(lcore_id, 0))
		return NULL;

	struct lcore_cfg *lconf = &lcore_cfg[lcore_id];

	if (task_id >= lconf->n_tasks_all)
		return NULL;

	if (lconf->targs[task_id].nb_rxrings == 0)
		return NULL;

	return lconf->targs[task_id].rx_rings[0];
}

static struct rte_ring *init_ring_between_tasks(struct lcore_cfg *lconf, struct task_args *starg,
				    const struct core_task ct, uint8_t ring_idx, int idx,
				    struct ring_init_stats *ris)
{
	uint8_t socket;
	struct rte_ring *ring = NULL;
	struct lcore_cfg *lworker;
	struct task_args *dtarg;

	PROX_ASSERT(prox_core_active(ct.core, 0));
	lworker = &lcore_cfg[ct.core];

	/* socket used is the one that the sending core resides on */
	socket = rte_lcore_to_socket_id(lconf->id);

	plog_info("\t\tCreating ring on socket %u with size %u\n"
		  "\t\t\tsource core, task and socket = %u, %u, %u\n"
		  "\t\t\tdestination core, task and socket = %u, %u, %u\n"
		  "\t\t\tdestination worker id = %u\n",
		  socket, starg->ring_size,
		  lconf->id, starg->id, socket,
		  ct.core, ct.task, rte_lcore_to_socket_id(ct.core),
		  ring_idx);

	if (ct.type) {
		struct rte_ring **dring = NULL;

		if (ct.type == CTRL_TYPE_MSG)
			dring = &lworker->ctrl_rings_m[ct.task];
		else if (ct.type == CTRL_TYPE_PKT) {
			dring = &lworker->ctrl_rings_p[ct.task];
			starg->flags |= TASK_ARG_CTRL_RINGS_P;
		}

		if (*dring == NULL)
			ring = rte_ring_create(gen_ring_name(), starg->ring_size, socket, RING_F_SC_DEQ);
		else
			ring = *dring;
		PROX_PANIC(ring == NULL, "Cannot create ring to connect I/O core %u with worker core %u\n", lconf->id, ct.core);

		starg->tx_rings[starg->tot_n_txrings_inited] = ring;
		starg->tot_n_txrings_inited++;
		*dring = ring;
		if (lconf->id == prox_cfg.master) {
			ctrl_rings[ct.core*MAX_TASKS_PER_CORE + ct.task] = ring;
		} else if (ct.core == prox_cfg.master) {
			starg->ctrl_plane_ring = ring;
		}

		plog_info("\t\tCore %u task %u to -> core %u task %u ctrl_ring %s %p %s\n",
			  lconf->id, starg->id, ct.core, ct.task, ct.type == CTRL_TYPE_PKT?
			  "pkt" : "msg", ring, ring->name);
		ris->n_ctrl_rings++;
		return ring;
	}

	dtarg = &lworker->targs[ct.task];
	lworker->targs[ct.task].worker_thread_id = ring_idx;
	PROX_ASSERT(dtarg->flags & TASK_ARG_RX_RING);
	PROX_ASSERT(ct.task < lworker->n_tasks_all);

	/* If all the following conditions are met, the ring can be
	   optimized away. */
	if (!task_is_master(starg) && !task_is_master(dtarg) && starg->lconf->id == dtarg->lconf->id &&
	    starg->nb_txrings == 1 && idx == 0 && dtarg->task &&
	    dtarg->tot_rxrings == 1 && starg->task == dtarg->task - 1) {
		plog_info("\t\tOptimizing away ring on core %u from task %u to task %u\n",
			  dtarg->lconf->id, starg->task, dtarg->task);
		/* No need to set up ws_mbuf. */
		starg->tx_opt_ring = 1;
		/* During init of destination task, the buffer in the
		   source task will be initialized. */
		dtarg->tx_opt_ring_task = starg;
		ris->n_opt_rings++;
		++dtarg->nb_rxrings;
		return NULL;
	}

	int ring_created = 1;
	/* Only create multi-producer rings if configured to do so AND
	   there is only one task sending to the task */
	if ((prox_cfg.flags & DSF_MP_RINGS && count_incoming_tasks(ct.core, ct.task) > 1)
		|| (prox_cfg.flags & DSF_ENABLE_BYPASS)) {
		ring = get_existing_ring(ct.core, ct.task);

		if (ring) {
			plog_info("\t\tCore %u task %u creatign MP ring %p to core %u task %u\n",
				  lconf->id, starg->id, ring, ct.core, ct.task);
			ring_created = 0;
		}
		else {
			ring = rte_ring_create(gen_ring_name(), starg->ring_size, socket, RING_F_SC_DEQ);
			plog_info("\t\tCore %u task %u using MP ring %p from core %u task %u\n",
				  lconf->id, starg->id, ring, ct.core, ct.task);
		}
	}
	else
		ring = rte_ring_create(gen_ring_name(), starg->ring_size, socket, RING_F_SP_ENQ | RING_F_SC_DEQ);

	PROX_PANIC(ring == NULL, "Cannot create ring to connect I/O core %u with worker core %u\n", lconf->id, ct.core);

	starg->tx_rings[starg->tot_n_txrings_inited] = ring;
	starg->tot_n_txrings_inited++;

	if (ring_created) {
		PROX_ASSERT(dtarg->nb_rxrings < MAX_RINGS_PER_TASK);
		dtarg->rx_rings[dtarg->nb_rxrings] = ring;
		++dtarg->nb_rxrings;
	}
	dtarg->nb_slave_threads = starg->core_task_set[idx].n_elems;
	dtarg->lb_friend_core = lconf->id;
	dtarg->lb_friend_task = starg->id;
	plog_info("\t\tWorker thread %d has core %d, task %d as a lb friend\n", ct.core, lconf->id, starg->id);
	plog_info("\t\tCore %u task %u tx_ring[%u] -> core %u task %u rx_ring[%u] %p %s %u WT\n",
		  lconf->id, starg->id, ring_idx, ct.core, ct.task, dtarg->nb_rxrings, ring, ring->name,
		  dtarg->nb_slave_threads);
	++ris->n_pkt_rings;
	return ring;
}

static void init_rings(void)
{
	struct lcore_cfg *lconf = NULL;
	struct task_args *starg;
	struct ring_init_stats ris = {0};

	while (core_targ_next(&lconf, &starg, 1) == 0) {
		plog_info("\t*** Initializing rings on core %u, task %u ***\n", lconf->id, starg->id);
		for (uint8_t idx = 0; idx < MAX_PROTOCOLS; ++idx) {
			for (uint8_t ring_idx = 0; ring_idx < starg->core_task_set[idx].n_elems; ++ring_idx) {
				PROX_ASSERT(ring_idx < MAX_WT_PER_LB);
				PROX_ASSERT(starg->tot_n_txrings_inited < MAX_RINGS_PER_TASK);

				struct core_task ct = starg->core_task_set[idx].core_task[ring_idx];
				init_ring_between_tasks(lconf, starg, ct, ring_idx, idx, &ris);
			}
		}
	}

	plog_info("\tInitialized %d rings:\n"
		  "\t\tNumber of packet rings: %u\n"
		  "\t\tNumber of control rings: %u\n"
		  "\t\tNumber of optimized rings: %u\n",
		  ring_init_stats_total(&ris),
		  ris.n_pkt_rings,
		  ris.n_ctrl_rings,
		  ris.n_opt_rings);

	lconf = NULL;
	struct prox_port_cfg *port;
	while (core_targ_next(&lconf, &starg, 1) == 0) {
		if ((starg->task_init) && (starg->flags & TASK_ARG_L3)) {
			struct core_task ct;
			ct.core = prox_cfg.master;
			ct.task = 0;
			ct.type = CTRL_TYPE_PKT;
			struct rte_ring *rx_ring = init_ring_between_tasks(lconf, starg, ct, 0, 0, &ris);

			ct.core = lconf->id;
			ct.task = starg->id;;
			struct rte_ring *tx_ring = init_ring_between_tasks(lcore_cfg, lcore_cfg[prox_cfg.master].targs, ct, 0, 0, &ris);
		}
	}
}

static void shuffle_mempool(struct rte_mempool* mempool, uint32_t nb_mbuf)
{
	struct rte_mbuf** pkts = prox_zmalloc(nb_mbuf * sizeof(*pkts), rte_socket_id());
	uint64_t got = 0;

	while (rte_mempool_get_bulk(mempool, (void**)(pkts + got), 1) == 0)
		++got;

	while (got) {
		int idx;
		do {
			idx = rand() % nb_mbuf - 1;
		} while (pkts[idx] == 0);

		rte_mempool_put_bulk(mempool, (void**)&pkts[idx], 1);
		pkts[idx] = 0;
		--got;
	};
	prox_free(pkts);
}

static void set_mbuf_size(struct task_args *targ)
{
	/* mbuf size can be set
	 *  - from config file (highest priority, overwriting any other config) - should only be used as workaround
	 *  - through each 'mode', overwriting the default mbuf_size
	 *  - defaulted to MBUF_SIZE i.e. 1518 Bytes
	 * Except if set explicitely, ensure that size is big enough for vmxnet3 driver
	 */
	if (targ->mbuf_size_set_explicitely)
		return;

	if (targ->task_init->mbuf_size != 0) {
		/* mbuf_size not set through config file but set through mode */
		targ->mbuf_size = targ->task_init->mbuf_size;
	}

	struct prox_port_cfg *port;
	uint16_t max_frame_size = 0;
	for (int i = 0; i < targ->nb_rxports; i++) {
		uint8_t if_port = targ->rx_port_queue[i].port;

		if (if_port == OUT_DISCARD) {
			continue;
		}
		port = &prox_port_cfg[if_port];
		if (max_frame_size < port->mtu + ETHER_HDR_LEN + ETHER_CRC_LEN + 2 * PROX_VLAN_TAG_SIZE)
			max_frame_size = port->mtu + ETHER_HDR_LEN + ETHER_CRC_LEN + 2 * PROX_VLAN_TAG_SIZE;

		if (strcmp(port->short_name, "vmxnet3") == 0) {
			if (targ->mbuf_size < MBUF_SIZE + RTE_PKTMBUF_HEADROOM)
				targ->mbuf_size = MBUF_SIZE + RTE_PKTMBUF_HEADROOM;
			if (targ->mbuf_size < max_frame_size)
				targ->mbuf_size = max_frame_size + RTE_PKTMBUF_HEADROOM;
		}
	}
	if (max_frame_size) {
		// i40e supports a maximum of 5 descriptors chained
		uint16_t required_mbuf_size = RTE_ALIGN(max_frame_size / 5, 128) + sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM;
		if (required_mbuf_size > targ->mbuf_size) {
			targ->mbuf_size = required_mbuf_size;
			plog_info("\t\tSetting mbuf_size to %u to support frame_size %u (mtu %u)\n", targ->mbuf_size, max_frame_size, port->mtu);
		}
	}

}

static void setup_mempools_unique_per_socket(void)
{
	uint32_t flags = 0;
	char name[64];
	struct lcore_cfg *lconf = NULL;
	struct task_args *targ;

	struct rte_mempool     *pool[MAX_SOCKETS];
	uint32_t mbuf_count[MAX_SOCKETS] = {0};
	uint32_t nb_cache_mbuf[MAX_SOCKETS] = {0};
	uint32_t mbuf_size[MAX_SOCKETS] = {0};

	while (core_targ_next_early(&lconf, &targ, 0) == 0) {
		PROX_PANIC(targ->task_init == NULL, "task_init = NULL, is mode specified for core %d, task %d ?\n", lconf->id, targ->id);
		uint8_t socket = rte_lcore_to_socket_id(lconf->id);
		PROX_ASSERT(socket < MAX_SOCKETS);

		set_mbuf_size(targ);
		if (targ->rx_port_queue[0].port != OUT_DISCARD) {
			struct prox_port_cfg* port_cfg = &prox_port_cfg[targ->rx_port_queue[0].port];
			PROX_ASSERT(targ->nb_mbuf != 0);
			mbuf_count[socket] += targ->nb_mbuf;
			if (nb_cache_mbuf[socket] == 0)
				nb_cache_mbuf[socket] = targ->nb_cache_mbuf;
			else {
				PROX_PANIC(nb_cache_mbuf[socket] != targ->nb_cache_mbuf,
					   "all mbuf_cache must have the same size if using a unique mempool per socket\n");
			}
			if (mbuf_size[socket] == 0)
				mbuf_size[socket] = targ->mbuf_size;
			else {
				PROX_PANIC(mbuf_size[socket] != targ->mbuf_size,
					   "all mbuf_size must have the same size if using a unique mempool per socket\n");
			}
		}
	}
	for (int i = 0 ; i < MAX_SOCKETS; i++) {
		if (mbuf_count[i] != 0) {
			sprintf(name, "socket_%u_pool", i);
			pool[i] = rte_mempool_create(name,
						     mbuf_count[i] - 1, mbuf_size[i],
						     nb_cache_mbuf[i],
						     sizeof(struct rte_pktmbuf_pool_private),
						     rte_pktmbuf_pool_init, NULL,
						     prox_pktmbuf_init, NULL,
						     i, flags);
			PROX_PANIC(pool[i] == NULL, "\t\tError: cannot create mempool for socket %u\n", i);
			plog_info("\t\tMempool %p size = %u * %u cache %u, socket %d\n", pool[i],
				  mbuf_count[i], mbuf_size[i], nb_cache_mbuf[i], i);

			if (prox_cfg.flags & DSF_SHUFFLE) {
				shuffle_mempool(pool[i], mbuf_count[i]);
			}
		}
	}

	lconf = NULL;
	while (core_targ_next_early(&lconf, &targ, 0) == 0) {
		uint8_t socket = rte_lcore_to_socket_id(lconf->id);

		if (targ->rx_port_queue[0].port != OUT_DISCARD) {
			/* use this pool for the interface that the core is receiving from */
			/* If one core receives from multiple ports, all the ports use the same mempool */
			targ->pool = pool[socket];
			/* Set the number of mbuf to the number of the unique mempool, so that the used and free work */
			targ->nb_mbuf = mbuf_count[socket];
			plog_info("\t\tMempool %p size = %u * %u cache %u, socket %d\n", targ->pool,
				  targ->nb_mbuf, mbuf_size[socket], targ->nb_cache_mbuf, socket);
		}
	}
}

static void setup_mempool_for_rx_task(struct lcore_cfg *lconf, struct task_args *targ)
{
	const uint8_t socket = rte_lcore_to_socket_id(lconf->id);
	struct prox_port_cfg *port_cfg = &prox_port_cfg[targ->rx_port_queue[0].port];
	const struct rte_memzone *mz;
	struct rte_mempool *mp = NULL;
	uint32_t flags = 0;
	char memzone_name[64];
	char name[64];

	set_mbuf_size(targ);

	/* allocate memory pool for packets */
	PROX_ASSERT(targ->nb_mbuf != 0);

	if (targ->pool_name[0] == '\0') {
		sprintf(name, "core_%u_port_%u_pool", lconf->id, targ->id);
	}

	snprintf(memzone_name, sizeof(memzone_name)-1, "MP_%s", targ->pool_name);
	mz = rte_memzone_lookup(memzone_name);

	if (mz != NULL) {
		mp = (struct rte_mempool*)mz->addr;

		targ->nb_mbuf = mp->size;
		targ->pool = mp;
	}

#ifdef RTE_LIBRTE_IVSHMEM_FALSE
	if (mz != NULL && mp != NULL && mp->phys_addr != mz->ioremap_addr) {
		/* Init mbufs with ioremap_addr for dma */
		mp->phys_addr = mz->ioremap_addr;
		mp->elt_pa[0] = mp->phys_addr + (mp->elt_va_start - (uintptr_t)mp);

		struct prox_pktmbuf_reinit_args init_args;
		init_args.mp = mp;
		init_args.lconf = lconf;

		uint32_t elt_sz = mp->elt_size + mp->header_size + mp->trailer_size;
		rte_mempool_obj_iter((void*)mp->elt_va_start, mp->size, elt_sz, 1,
				     mp->elt_pa, mp->pg_num, mp->pg_shift, prox_pktmbuf_reinit, &init_args);
	}
#endif

	/* Use this pool for the interface that the core is
	   receiving from if one core receives from multiple
	   ports, all the ports use the same mempool */
	if (targ->pool == NULL) {
		plog_info("\t\tCreating mempool with name '%s'\n", name);
		targ->pool = rte_mempool_create(name,
						targ->nb_mbuf - 1, targ->mbuf_size,
						targ->nb_cache_mbuf,
						sizeof(struct rte_pktmbuf_pool_private),
						rte_pktmbuf_pool_init, NULL,
						prox_pktmbuf_init, lconf,
						socket, flags);
	}

	PROX_PANIC(targ->pool == NULL,
		   "\t\tError: cannot create mempool for core %u port %u: %s\n", lconf->id, targ->id, rte_strerror(rte_errno));

	plog_info("\t\tMempool %p size = %u * %u cache %u, socket %d\n", targ->pool,
		  targ->nb_mbuf, targ->mbuf_size, targ->nb_cache_mbuf, socket);
	if (prox_cfg.flags & DSF_SHUFFLE) {
		shuffle_mempool(targ->pool, targ->nb_mbuf);
	}
}

static void setup_mempools_multiple_per_socket(void)
{
	struct lcore_cfg *lconf = NULL;
	struct task_args *targ;

	while (core_targ_next_early(&lconf, &targ, 0) == 0) {
		PROX_PANIC(targ->task_init == NULL, "task_init = NULL, is mode specified for core %d, task %d ?\n", lconf->id, targ->id);
		if (targ->rx_port_queue[0].port == OUT_DISCARD)
			continue;
		setup_mempool_for_rx_task(lconf, targ);
	}
}

static void setup_mempools(void)
{
	if (prox_cfg.flags & UNIQUE_MEMPOOL_PER_SOCKET)
		setup_mempools_unique_per_socket();
	else
		setup_mempools_multiple_per_socket();
}

static void set_task_lconf(void)
{
	struct lcore_cfg *lconf;
	uint32_t lcore_id = -1;

	while(prox_core_next(&lcore_id, 1) == 0) {
		lconf = &lcore_cfg[lcore_id];
		for (uint8_t task_id = 0; task_id < lconf->n_tasks_all; ++task_id) {
			lconf->targs[task_id].lconf = lconf;
		}
	}
}

static void set_dest_threads(void)
{
	struct lcore_cfg *lconf = NULL;
	struct task_args *targ;

	while (core_targ_next(&lconf, &targ, 0) == 0) {
		for (uint8_t idx = 0; idx < MAX_PROTOCOLS; ++idx) {
			for (uint8_t ring_idx = 0; ring_idx < targ->core_task_set[idx].n_elems; ++ring_idx) {
				struct core_task ct = targ->core_task_set[idx].core_task[ring_idx];

				struct task_args *dest_task = core_targ_get(ct.core, ct.task);
				dest_task->prev_tasks[dest_task->n_prev_tasks++] = targ;
			}
		}
	}
}

static void setup_all_task_structs_early_init(void)
{
	struct lcore_cfg *lconf = NULL;
	struct task_args *targ;

	plog_info("\t*** Calling early init on all tasks ***\n");
	while (core_targ_next(&lconf, &targ, 0) == 0) {
		if (targ->task_init->early_init) {
			targ->task_init->early_init(targ);
		}
	}
}

static void setup_all_task_structs(void)
{
	struct lcore_cfg *lconf;
	uint32_t lcore_id = -1;
	struct task_base *tmaster = NULL;

	while(prox_core_next(&lcore_id, 1) == 0) {
		lconf = &lcore_cfg[lcore_id];
		for (uint8_t task_id = 0; task_id < lconf->n_tasks_all; ++task_id) {
			if (task_is_master(&lconf->targs[task_id])) {
				plog_info("\tInitializing MASTER struct for core %d task %d\n", lcore_id, task_id);
				lconf->tasks_all[task_id] = init_task_struct(&lconf->targs[task_id]);
				tmaster = lconf->tasks_all[task_id];
			}
		}
	}
	PROX_PANIC(tmaster == NULL, "Can't initialize master task\n");
	lcore_id = -1;

	while(prox_core_next(&lcore_id, 1) == 0) {
		lconf = &lcore_cfg[lcore_id];
		plog_info("\tInitializing struct for core %d with %d task\n", lcore_id, lconf->n_tasks_all);
		for (uint8_t task_id = 0; task_id < lconf->n_tasks_all; ++task_id) {
			if (!task_is_master(&lconf->targs[task_id])) {
				plog_info("\tInitializing struct for core %d task %d\n", lcore_id, task_id);
				lconf->targs[task_id].tmaster = tmaster;
				lconf->tasks_all[task_id] = init_task_struct(&lconf->targs[task_id]);
			}
		}
	}
}

static void init_port_activate(void)
{
	struct lcore_cfg *lconf = NULL;
	struct task_args *targ;
	uint8_t port_id = 0;

	while (core_targ_next_early(&lconf, &targ, 0) == 0) {
		for (int i = 0; i < targ->nb_rxports; i++) {
			port_id = targ->rx_port_queue[i].port;
			prox_port_cfg[port_id].active = 1;
		}

		for (int i = 0; i < targ->nb_txports; i++) {
			port_id = targ->tx_port_queue[i].port;
			prox_port_cfg[port_id].active = 1;
		}
	}
}

/* Initialize cores and allocate mempools */
static void init_lcores(void)
{
	struct lcore_cfg *lconf = 0;
	uint32_t lcore_id = -1;

	while(prox_core_next(&lcore_id, 0) == 0) {
		uint8_t socket = rte_lcore_to_socket_id(lcore_id);
		PROX_PANIC(socket + 1 > MAX_SOCKETS, "Can't configure core %u (on socket %u). MAX_SOCKET is set to %d\n", lcore_id, socket, MAX_SOCKETS);
	}

	/* need to allocate mempools as the first thing to use the lowest possible address range */
	plog_info("=== Initializing mempools ===\n");
	setup_mempools();

	lcore_cfg_alloc_hp();

	set_dest_threads();
	set_task_lconf();

	plog_info("=== Initializing port addresses ===\n");
	init_port_addr();

	plog_info("=== Initializing queue numbers on cores ===\n");
	configure_if_queues();

	plog_info("=== Initializing rings on cores ===\n");
	init_rings();

	plog_info("=== Checking configuration consistency ===\n");
	check_cfg_consistent();

	plog_all_rings();

	setup_all_task_structs_early_init();
	plog_info("=== Initializing tasks ===\n");
	setup_all_task_structs();
}

static int setup_prox(int argc, char **argv)
{
	if (prox_read_config_file() != 0 ||
	    prox_setup_rte(argv[0]) != 0) {
		return -1;
	}

	if (prox_cfg.flags & DSF_CHECK_SYNTAX) {
		plog_info("=== Configuration file syntax has been checked ===\n\n");
		exit(EXIT_SUCCESS);
	}

	init_port_activate();
	plog_info("=== Initializing rte devices ===\n");
	if (!(prox_cfg.flags & DSF_USE_DUMMY_DEVICES))
		init_rte_ring_dev();
	init_rte_dev(prox_cfg.flags & DSF_USE_DUMMY_DEVICES);
	plog_info("=== Calibrating TSC overhead ===\n");
	clock_init();
	plog_info("\tTSC running at %"PRIu64" Hz\n", rte_get_tsc_hz());

	init_lcores();
	plog_info("=== Initializing ports ===\n");
	init_port_all();

	if (prox_cfg.logbuf_size) {
		prox_cfg.logbuf = prox_zmalloc(prox_cfg.logbuf_size, rte_socket_id());
		PROX_PANIC(prox_cfg.logbuf == NULL, "Failed to allocate memory for logbuf with size = %d\n", prox_cfg.logbuf_size);
	}

	if (prox_cfg.flags & DSF_CHECK_INIT) {
		plog_info("=== Initialization sequence completed ===\n\n");
		exit(EXIT_SUCCESS);
	}

	/* Current way that works to disable DPDK logging */
	FILE *f = fopen("/dev/null", "r");
	rte_openlog_stream(f);
	plog_info("=== PROX started ===\n");
	return 0;
}

static int success = 0;
static void siguser_handler(int signal)
{
	if (signal == SIGUSR1)
		success = 1;
	else
		success = 0;
}

static void sigabrt_handler(__attribute__((unused)) int signum)
{
	/* restore default disposition for SIGABRT and SIGPIPE */
	signal(SIGABRT, SIG_DFL);
	signal(SIGPIPE, SIG_DFL);

	/* ignore further Ctrl-C */
	signal(SIGINT, SIG_IGN);

	/* more drastic exit on tedious termination signal */
	plog_info("Aborting...\n");
	if (lcore_cfg != NULL) {
		uint32_t lcore_id;
		pthread_t thread_id, tid0, tid = pthread_self();
		memset(&tid0, 0, sizeof(tid0));

		/* cancel all threads except current one */
		lcore_id = -1;
		while (prox_core_next(&lcore_id, 1) == 0) {
			thread_id = lcore_cfg[lcore_id].thread_id;
			if (pthread_equal(thread_id, tid0))
				continue;
			if (pthread_equal(thread_id, tid))
				continue;
			pthread_cancel(thread_id);
		}

		/* wait for cancelled threads to terminate */
		lcore_id = -1;
		while (prox_core_next(&lcore_id, 1) == 0) {
			thread_id = lcore_cfg[lcore_id].thread_id;
			if (pthread_equal(thread_id, tid0))
				continue;
			if (pthread_equal(thread_id, tid))
				continue;
			pthread_join(thread_id, NULL);
		}
	}

	/* close ncurses */
	display_end();

	/* close ports on termination signal */
	close_ports_atexit();

	/* terminate now */
	abort();
}

static void sigterm_handler(int signum)
{
	/* abort on second Ctrl-C */
	if (signum == SIGINT)
		signal(SIGINT, sigabrt_handler);

	/* gracefully quit on harmless termination signal */
	/* ports will subsequently get closed at resulting exit */
	quit();
}

int main(int argc, char **argv)
{
	/* set en_US locale to print big numbers with ',' */
	setlocale(LC_NUMERIC, "en_US.utf-8");

	if (prox_parse_args(argc, argv) != 0){
		prox_usage(argv[0]);
	}

	plog_init(prox_cfg.log_name, prox_cfg.log_name_pid);
	plog_info("=== " PROGRAM_NAME " " VERSION_STR " ===\n");
	plog_info("\tUsing DPDK %s\n", rte_version() + sizeof(RTE_VER_PREFIX));
	read_rdt_info();

	if (prox_cfg.flags & DSF_LIST_TASK_MODES) {
		/* list supported task modes and exit */
		tasks_list();
		return EXIT_SUCCESS;
	}

	/* close ports at normal exit */
	atexit(close_ports_atexit);
	/* gracefully quit on harmless termination signals */
	signal(SIGHUP, sigterm_handler);
	signal(SIGINT, sigterm_handler);
	signal(SIGQUIT, sigterm_handler);
	signal(SIGTERM, sigterm_handler);
	signal(SIGUSR1, sigterm_handler);
	signal(SIGUSR2, sigterm_handler);
	/* more drastic exit on tedious termination signals */
	signal(SIGABRT, sigabrt_handler);
	signal(SIGPIPE, sigabrt_handler);

	if (prox_cfg.flags & DSF_DAEMON) {
		signal(SIGUSR1, siguser_handler);
		signal(SIGUSR2, siguser_handler);
		plog_info("=== Running in Daemon mode ===\n");
		plog_info("\tForking child and waiting for setup completion\n");

		pid_t ppid = getpid();
		pid_t pid = fork();
		if (pid < 0) {
			plog_err("Failed to fork process to run in daemon mode\n");
			return EXIT_FAILURE;
		}

		if (pid == 0) {
			fclose(stdin);
			fclose(stdout);
			fclose(stderr);
			if (setsid() < 0) {
				kill(ppid, SIGUSR2);
				return EXIT_FAILURE;
			}
			if (setup_prox(argc, argv) != 0) {
				kill(ppid, SIGUSR2);
				return EXIT_FAILURE;
			}
			else {
				kill(ppid, SIGUSR1);
				run(prox_cfg.flags);
				return EXIT_SUCCESS;
			}
		}
		else {
			/* Before exiting the parent, wait until the
			   child process has finished setting up */
			pause();
			if (prox_cfg.logbuf) {
				file_print(prox_cfg.logbuf);
			}
			return success? EXIT_SUCCESS : EXIT_FAILURE;
		}
	}

	if (setup_prox(argc, argv) != 0)
		return EXIT_FAILURE;
	run(prox_cfg.flags);
	return EXIT_SUCCESS;
}