summaryrefslogtreecommitdiffstats
path: root/ebtables.c
blob: f3e8cddeffac4a32b7ec90620f848e468d7b7ade (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
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
/*
 * ebtables.c, v2.0 July 2002
 *
 * Author: Bart De Schuymer
 *
 *  This code was stongly inspired on the iptables code which is
 *  Copyright (C) 1999 Paul `Rusty' Russell & Michael J. Neuling
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <getopt.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <netinet/ether.h>
#include "include/ebtables_u.h"
#include "include/ethernetdb.h"
#include <unistd.h>
#include <fcntl.h>
#include <sys/wait.h>

/* dDfault command line options. Do not mess around with the already
 * assigned numbers unless you know what you are doing */
static struct option ebt_original_options[] =
{
	{ "append"        , required_argument, 0, 'A' },
	{ "insert"        , required_argument, 0, 'I' },
	{ "delete"        , required_argument, 0, 'D' },
	{ "list"          , optional_argument, 0, 'L' },
	{ "Lc"            , no_argument      , 0, 4   },
	{ "Ln"            , no_argument      , 0, 5   },
	{ "Lx"            , no_argument      , 0, 6   },
	{ "Lmac2"         , no_argument      , 0, 12  },
	{ "zero"          , optional_argument, 0, 'Z' },
	{ "flush"         , optional_argument, 0, 'F' },
	{ "policy"        , required_argument, 0, 'P' },
	{ "in-interface"  , required_argument, 0, 'i' },
	{ "in-if"         , required_argument, 0, 'i' },
	{ "logical-in"    , required_argument, 0, 2   },
	{ "logical-out"   , required_argument, 0, 3   },
	{ "out-interface" , required_argument, 0, 'o' },
	{ "out-if"        , required_argument, 0, 'o' },
	{ "version"       , no_argument      , 0, 'V' },
	{ "help"          , no_argument      , 0, 'h' },
	{ "jump"          , required_argument, 0, 'j' },
	{ "set-counter"   , required_argument, 0, 'c' },
	{ "change-counter", required_argument, 0, 'C' },
	{ "proto"         , required_argument, 0, 'p' },
	{ "protocol"      , required_argument, 0, 'p' },
	{ "db"            , required_argument, 0, 'b' },
	{ "source"        , required_argument, 0, 's' },
	{ "src"           , required_argument, 0, 's' },
	{ "destination"   , required_argument, 0, 'd' },
	{ "dst"           , required_argument, 0, 'd' },
	{ "table"         , required_argument, 0, 't' },
	{ "modprobe"      , required_argument, 0, 'M' },
	{ "new-chain"     , required_argument, 0, 'N' },
	{ "rename-chain"  , required_argument, 0, 'E' },
	{ "delete-chain"  , optional_argument, 0, 'X' },
	{ "atomic-init"   , no_argument      , 0, 7   },
	{ "atomic-commit" , no_argument      , 0, 8   },
	{ "atomic-file"   , required_argument, 0, 9   },
	{ "atomic-save"   , no_argument      , 0, 10  },
	{ "init-table"    , no_argument      , 0, 11  },
	{ 0 }
};

static struct option *ebt_options = ebt_original_options;

/* Holds all the data */
static struct ebt_u_replace *replace;

/* The chosen table */
static struct ebt_u_table *table = NULL;

/* The pointers in here are special:
 * The struct ebt_target * pointer is actually a struct ebt_u_target * pointer.
 * instead of making yet a few other structs, we just do a cast.
 * We need a struct ebt_u_target pointer because we know the address of the data
 * they point to won't change. We want to allow that the struct ebt_u_target.t
 * member can change.
 * Same holds for the struct ebt_match and struct ebt_watcher pointers */
static struct ebt_u_entry *new_entry;


static int global_option_offset;
#define OPTION_OFFSET 256
static struct option *
merge_options(struct option *oldopts, const struct option *newopts,
	    unsigned int *options_offset)
{
	unsigned int num_old, num_new, i;
	struct option *merge;

	if (!newopts || !oldopts || !options_offset)
		ebt_print_bug("merge wrong");
	for (num_old = 0; oldopts[num_old].name; num_old++);
	for (num_new = 0; newopts[num_new].name; num_new++);

	global_option_offset += OPTION_OFFSET;
	*options_offset = global_option_offset;

	merge = malloc(sizeof(struct option) * (num_new + num_old + 1));
	if (!merge)
		ebt_print_memory();
	memcpy(merge, oldopts, num_old * sizeof(struct option));
	for (i = 0; i < num_new; i++) {
		merge[num_old + i] = newopts[i];
		merge[num_old + i].val += *options_offset;
	}
	memset(merge + num_old + num_new, 0, sizeof(struct option));
	/* Only free dynamically allocated stuff */
	if (oldopts != ebt_original_options)
		free(oldopts);

	return merge;
}

static void merge_match(struct ebt_u_match *m)
{
	ebt_options = merge_options
	   (ebt_options, m->extra_ops, &(m->option_offset));
}

static void merge_watcher(struct ebt_u_watcher *w)
{
	ebt_options = merge_options
	   (ebt_options, w->extra_ops, &(w->option_offset));
}

static void merge_target(struct ebt_u_target *t)
{
	ebt_options = merge_options
	   (ebt_options, t->extra_ops, &(t->option_offset));
}

/* Be backwards compatible, so don't use '+' in kernel */
#define IF_WILDCARD 1
static void print_iface(const char *iface)
{
	char *c;

	if ((c = strchr(iface, IF_WILDCARD)))
		*c = '+';
	printf("%s ", iface);
	if (c)
		*c = IF_WILDCARD;
}

/* We use replace->flags, so we can't use the following values:
 * 0x01 == OPT_COMMAND, 0x02 == OPT_TABLE, 0x100 == OPT_ZERO */
#define LIST_N    0x04
#define LIST_C    0x08
#define LIST_X    0x10
#define LIST_MAC2 0x20

/* Helper function for list_rules() */
static void list_em(struct ebt_u_entries *entries)
{
	int i, j, space = 0, digits;
	struct ebt_u_entry *hlp;
	struct ebt_u_match_list *m_l;
	struct ebt_u_watcher_list *w_l;
	struct ebt_u_match *m;
	struct ebt_u_watcher *w;
	struct ebt_u_target *t;

	if (replace->flags & LIST_MAC2)
		ebt_printstyle_mac = 2;
	hlp = entries->entries;
	if (replace->flags & LIST_X && entries->policy != EBT_ACCEPT) {
		printf("ebtables -t %s -P %s %s\n", replace->name,
		   entries->name, ebt_standard_targets[-entries->policy - 1]);
	} else if (!(replace->flags & LIST_X)) {
		printf("\nBridge chain: %s, entries: %d, policy: %s\n",
		   entries->name, entries->nentries,
		   ebt_standard_targets[-entries->policy - 1]);
	}

	i = entries->nentries;
	while (i > 9) {
		space++;
		i /= 10;
	}

	for (i = 0; i < entries->nentries; i++) {
		if (replace->flags & LIST_N) {
			digits = 0;
			/* A little work to get nice rule numbers. */
			j = i + 1;
			while (j > 9) {
				digits++;
				j /= 10;
			}
			for (j = 0; j < space - digits; j++)
				printf(" ");
			printf("%d. ", i + 1);
		}
		if (replace->flags & LIST_X)
			printf("ebtables -t %s -A %s ",
			   replace->name, entries->name);

		/* The standard target's print() uses this to find out
		 * the name of a udc */
		hlp->replace = replace;

		/* Don't print anything about the protocol if no protocol was
		 * specified, obviously this means any protocol will do. */
		if (!(hlp->bitmask & EBT_NOPROTO)) {
			printf("-p ");
			if (hlp->invflags & EBT_IPROTO)
				printf("! ");
			if (hlp->bitmask & EBT_802_3)
				printf("Length ");
			else {
				struct ethertypeent *ent;

				ent = getethertypebynumber
				      (ntohs(hlp->ethproto));
				if (!ent)
					printf("0x%x ", ntohs(hlp->ethproto));
				else
					printf("%s ", ent->e_name);
			}
		}
		if (hlp->bitmask & EBT_SOURCEMAC) {
			printf("-s ");
			if (hlp->invflags & EBT_ISOURCE)
				printf("! ");
			ebt_print_mac_and_mask(hlp->sourcemac, hlp->sourcemsk);
			printf(" ");
		}
		if (hlp->bitmask & EBT_DESTMAC) {
			printf("-d ");
			if (hlp->invflags & EBT_IDEST)
				printf("! ");
			ebt_print_mac_and_mask(hlp->destmac, hlp->destmsk);
			printf(" ");
		}
		if (hlp->in[0] != '\0') {
			printf("-i ");
			if (hlp->invflags & EBT_IIN)
				printf("! ");
			print_iface(hlp->in);
		}
		if (hlp->logical_in[0] != '\0') {
			printf("--logical-in ");
			if (hlp->invflags & EBT_ILOGICALIN)
				printf("! ");
			print_iface(hlp->logical_in);
		}
		if (hlp->logical_out[0] != '\0') {
			printf("--logical-out ");
			if (hlp->invflags & EBT_ILOGICALOUT)
				printf("! ");
			print_iface(hlp->logical_out);
		}
		if (hlp->out[0] != '\0') {
			printf("-o ");
			if (hlp->invflags & EBT_IOUT)
				printf("! ");
			print_iface(hlp->out);
		}

		m_l = hlp->m_list;
		while (m_l) {
			m = ebt_find_match(m_l->m->u.name);
			if (!m)
				ebt_print_bug("Match not found");
			m->print(hlp, m_l->m);
			m_l = m_l->next;
		}
		w_l = hlp->w_list;
		while (w_l) {
			w = ebt_find_watcher(w_l->w->u.name);
			if (!w)
				ebt_print_bug("Watcher not found");
			w->print(hlp, w_l->w);
			w_l = w_l->next;
		}

		printf("-j ");
		if (strcmp(hlp->t->u.name, EBT_STANDARD_TARGET))
			printf("%s ", hlp->t->u.name);
		t = ebt_find_target(hlp->t->u.name);
		if (!t)
			ebt_print_bug("Target '%s' not found", hlp->t->u.name);
		t->print(hlp, hlp->t);
		if (replace->flags & LIST_C) {
			if (replace->flags & LIST_X)
				printf("-c %llu %llu", hlp->cnt.pcnt, hlp->cnt.bcnt);
			else
				printf(", pcnt = %llu -- bcnt = %llu", hlp->cnt.pcnt, hlp->cnt.bcnt);
		}
		printf("\n");
		hlp = hlp->next;
	}
}

static void print_help()
{
	struct ebt_u_match_list *m_l;
	struct ebt_u_watcher_list *w_l;

	PRINT_VERSION;
	printf(
"Usage:\n"
"ebtables -[ADI] chain rule-specification [options]\n"
"ebtables -P chain target\n"
"ebtables -[LFZ] [chain]\n"
"ebtables -[NX] [chain]\n"
"ebtables -E old-chain-name new-chain-name\n\n"
"Commands:\n"
"--append -A chain             : append to chain\n"
"--delete -D chain             : delete matching rule from chain\n"
"--delete -D chain rulenum     : delete rule at position rulenum from chain\n"
"--insert -I chain rulenum     : insert rule at position rulenum in chain\n"
"--list   -L [chain]           : list the rules in a chain or in all chains\n"
"--flush  -F [chain]           : delete all rules in chain or in all chains\n"
"--init-table                  : replace the kernel table with the initial table\n"
"--zero   -Z [chain]           : put counters on zero in chain or in all chains\n"
"--policy -P chain target      : change policy on chain to target\n"
"--new-chain -N chain          : create a user defined chain\n"
"--rename-chain -E old new     : rename a chain\n"
"--delete-chain -X [chain]     : delete a user defined chain\n"
"--atomic-commit               : update the kernel w/t table contained in <FILE>\n"
"--atomic-init                 : put the initial kernel table into <FILE>\n"
"--atomic-save                 : put the current kernel table into <FILE>\n"
"--atomic-file file            : set <FILE> to file\n\n"
"Options:\n"
"--proto  -p [!] proto         : protocol hexadecimal, by name or LENGTH\n"
"--src    -s [!] address[/mask]: source mac address\n"
"--dst    -d [!] address[/mask]: destination mac address\n"
"--in-if  -i [!] name[+]       : network input interface name\n"
"--out-if -o [!] name[+]       : network output interface name\n"
"--logical-in  [!] name[+]     : logical bridge input interface name\n"
"--logical-out [!] name[+]     : logical bridge output interface name\n"
"--modprobe -M program         : try to insert modules using this program\n"
"--version -V                  : print package version\n\n"
"Environment variable:\n"
ATOMIC_ENV_VARIABLE "          : if set <FILE> (see above) will equal its value"
"\n\n");
	m_l = new_entry->m_list;
	while (m_l) {
		((struct ebt_u_match *)m_l->m)->help();
		printf("\n");
		m_l = m_l->next;
	}
	w_l = new_entry->w_list;
	while (w_l) {
		((struct ebt_u_watcher *)w_l->w)->help();
		printf("\n");
		w_l = w_l->next;
	}
	((struct ebt_u_target *)new_entry->t)->help();
	printf("\n");
	if (table->help)
		table->help(ebt_hooknames);
}

/* Execute command L */
static void list_rules()
{
	int i;

	if (!(replace->flags & LIST_X))
		printf("Bridge table: %s\n", table->name);
	if (replace->selected_chain != -1) {
		list_em(ebt_to_chain(replace));
	} else {
		struct ebt_u_chain_list *cl = replace->udc;

		/* Create new chains and rename standard chains when necessary */
		if (replace->flags & LIST_X) {
			while (cl) {
				printf("ebtables -t %s -N %s\n", replace->name,
				   cl->udc->name);
				cl = cl->next;
			}
			cl = replace->udc;
			for (i = 0; i < NF_BR_NUMHOOKS; i++)
				if (replace->valid_hooks & (1 << i) &&
				   strcmp(replace->hook_entry[i]->name,
					  ebt_hooknames[i]))
					printf("ebtables -t %s -E %s %s\n",
					   replace->name, ebt_hooknames[i],
					   replace->hook_entry[i]->name);
		}
		i = 0;
		while (1) {
			if (i < NF_BR_NUMHOOKS) {
				if (replace->valid_hooks & (1 << i))
					list_em(replace->hook_entry[i]);
				i++;
				continue;
			} else {
				if (!cl)
					break;
				list_em(cl->udc);
				cl = cl->next;
			}
		}
	}
}

static int parse_delete_rule(const char *argv, int *rule_nr, int *rule_nr_end)
{
	char *colon = strchr(argv, ':'), *buffer;

	if (colon) {
		*colon = '\0';
		if (*(colon + 1) == '\0')
			*rule_nr_end = -1; /* Until the last rule */
		else {
			*rule_nr_end = strtol(colon + 1, &buffer, 10);
			if (*buffer != '\0' || *rule_nr_end == 0)
				return -1;
		}
	}
	if (colon == argv)
		*rule_nr = 1; /* Beginning with the first rule */
	else {
		*rule_nr = strtol(argv, &buffer, 10);
		if (*buffer != '\0' || *rule_nr == 0)
			return -1;
	}
	if (!colon)
		*rule_nr_end = *rule_nr;
	return 0;
}

static int parse_change_counters_rule(int argc, char **argv, int *rule_nr, int *rule_nr_end)
{
	char *buffer;

	if (optind + 1 >= argc || (argv[optind][0] == '-' && (argv[optind][1] < '0' || argv[optind][1] > '9')) ||
	    (argv[optind + 1][0] == '-' && (argv[optind + 1][1] < '0'  && argv[optind + 1][1] > '9')))
		ebt_print_error2("The command -C needs at least 3 arguments");
	if (optind + 2 < argc && (argv[optind + 2][0] != '-' || (argv[optind][1] >= '0' && argv[optind][1] <= '9'))) {
		if (optind + 3 != argc)
			ebt_print_error2("No extra options allowed with -C start_nr[:end_nr] pcnt bcnt");
		if (parse_delete_rule(argv[optind], rule_nr, rule_nr_end))
			ebt_print_error2("Something is wrong with the rule number specification '%s'", argv[optind]);
		optind++;
	}

	new_entry->cnt.pcnt = strtoull(argv[optind], &buffer, 10);
	if (*buffer != '\0')
		ebt_print_error2("Packet counter '%s' invalid", argv[optind])
	optind++;
	new_entry->cnt.bcnt = strtoull(argv[optind], &buffer, 10);
	if (*buffer != '\0')
		ebt_print_error2("Packet counter '%s' invalid", argv[optind])

	optind++;
	return 0;
}

static int parse_iface(char *iface, char *option)
{
	char *c;

	if ((c = strchr(iface, '+'))) {
		if (*(c + 1) != '\0') {
			ebt_print_error("Spurious characters after '+' "
			                "wildcard for %s", option);
			return -1;
		} else
			*c = IF_WILDCARD;
	}
	return 0;
}

void ebt_early_init_once()
{
	ebt_iterate_matches(merge_match);
	ebt_iterate_watchers(merge_watcher);
	ebt_iterate_targets(merge_target);
}

#define OPT_COMMANDS (replace->flags & OPT_COMMAND || replace->flags & OPT_ZERO)

#define OPT_COMMAND	0x01
#define OPT_TABLE	0x02
#define OPT_IN		0x04
#define OPT_OUT		0x08
#define OPT_JUMP	0x10
#define OPT_PROTOCOL	0x20
#define OPT_SOURCE	0x40
#define OPT_DEST	0x80
#define OPT_ZERO	0x100
#define OPT_LOGICALIN	0x200
#define OPT_LOGICALOUT	0x400
#define OPT_KERNELDATA	0x800 /* This value is also defined in ebtablesd.c */
#define OPT_COUNT	0x1000
int do_command(int argc, char *argv[], int exec_style,
               struct ebt_u_replace *replace_)
{
	char *buffer;
	int c, i;
	/* Needed for the -Z option (we can have -Z <this> -L <that>) */
	int zerochain = -1;
	int policy = 0;
	int rule_nr = 0;
	int rule_nr_end = 0;
	struct ebt_u_target *t;
	struct ebt_u_match *m;
	struct ebt_u_watcher *w;
	struct ebt_u_match_list *m_l;
	struct ebt_u_watcher_list *w_l;
	struct ebt_u_entries *entries;

	opterr = 0;
	ebt_modprobe = NULL;

	replace = replace_;

	/* The daemon doesn't use the environment variable */
	if (exec_style == EXEC_STYLE_PRG) {
		buffer = getenv(ATOMIC_ENV_VARIABLE);
		if (buffer) {
			replace->filename = malloc(strlen(buffer) + 1);
			if (!replace->filename)
				ebt_print_memory();
			strcpy(replace->filename, buffer);
			buffer = NULL;
		}
	}

	replace->flags &= OPT_KERNELDATA; /* ebtablesd needs OPT_KERNELDATA */
	replace->selected_chain = -1;
	replace->command = 'h';

	if (!new_entry) {
		new_entry = (struct ebt_u_entry *)malloc(sizeof(struct ebt_u_entry));
		if (!new_entry)
			ebt_print_memory();
	}
	/* Put some sane values in our new entry */
	ebt_initialize_entry(new_entry);
	new_entry->replace = replace;

	/* The scenario induced by this loop makes that:
	 * '-t'  ,'-M' and --atomic (if specified) have to come
	 * before '-A' and the like */

	/* Getopt saves the day */
	while ((c = getopt_long(argc, argv,
	   "-A:D:C:I:N:E:X::L::Z::F::P:Vhi:o:j:c:p:s:d:t:M:", ebt_options, NULL)) != -1) {
		switch (c) {

		case 'A': /* Add a rule */
		case 'D': /* Delete a rule */
		case 'C': /* Change counters */
		case 'P': /* Define policy */
		case 'I': /* Insert a rule */
		case 'N': /* Make a user defined chain */
		case 'E': /* Rename chain */
		case 'X': /* Delete chain */
			/* We allow -N chainname -P policy */
			if (replace->command == 'N' && c == 'P') {
				replace->command = c;
				optind--; /* No table specified */
				goto handle_P;
			}
			if (OPT_COMMANDS)
				ebt_print_error2("Multiple commands are not allowed");

			replace->command = c;
			replace->flags |= OPT_COMMAND;
			if (!(replace->flags & OPT_KERNELDATA))
				ebt_get_kernel_table(replace, 0);
			if (optarg && (optarg[0] == '-' || !strcmp(optarg, "!")))
				ebt_print_error2("No chain name specified");
			if (c == 'N') {
				ebt_new_chain(replace, optarg, EBT_ACCEPT);
				/* This is needed to get -N x -P y working */
				replace->selected_chain = ebt_get_chainnr(replace, optarg);
				break;
			} else if (c == 'X') {
				if (optind >= argc) {
					replace->selected_chain = -1;
					ebt_delete_chain(replace);
					break;
				}

				if (optind < argc - 1)
					ebt_print_error2("No extra options allowed with -X");

				if ((replace->selected_chain = ebt_get_chainnr(replace, argv[optind])) == -1)
					ebt_print_error2("Chain %s doesn't exist", argv[optind]);
				ebt_delete_chain(replace);
				if (ebt_errormsg[0] != '\0')
					return -1;
				optind++;
				break;
			}

			if ((replace->selected_chain = ebt_get_chainnr(replace, optarg)) == -1)
				ebt_print_error2("Chain %s doesn't exist", optarg);
			if (c == 'E') {
				if (optind >= argc)
					ebt_print_error2("No new chain name specified");
				if (optind < argc - 1)
					ebt_print_error2("No extra options allowed with -E");
				if (strlen(argv[optind])>=EBT_CHAIN_MAXNAMELEN)
					ebt_print_error2("Chain name length can't exceed %d", EBT_CHAIN_MAXNAMELEN - 1);
				if (ebt_get_chainnr(replace, argv[optind]) != -1)
					ebt_print_error2("Chain %s already exists", argv[optind]);
				if (ebt_find_target(argv[optind]))
					ebt_print_error2("Target with name %s exists", argv[optind]);
				ebt_rename_chain(replace, argv[optind]);
				optind++;
				break;
			} else if (c == 'D' && optind < argc && (argv[optind][0] != '-' || (argv[optind][1] >= '0' && argv[optind][1] <= '9'))) {
				if (optind != argc - 1)
					ebt_print_error2("No extra options allowed with -D start_nr[:end_nr]");
				if (parse_delete_rule(argv[optind], &rule_nr, &rule_nr_end))
					ebt_print_error2("Problem with the specified rule number(s) '%s'", argv[optind]);
				optind++;
			} else if (c == 'C') {
				if (parse_change_counters_rule(argc, argv, &rule_nr, &rule_nr_end))
					return -1;
			} else if (c == 'I') {
				if (optind >= argc || (argv[optind][0] == '-' && (argv[optind][1] < '0' || argv[optind][1] > '9')))
					ebt_print_error2("No rulenr for -I specified");
				rule_nr = strtol(argv[optind], &buffer, 10);
				if (*buffer != '\0')
					ebt_print_error2("Problem with the specified rule number");
				optind++;
			} else if (c == 'P') {
handle_P:
				if (optind >= argc)
					ebt_print_error2("No policy specified");
				for (i = 0; i < NUM_STANDARD_TARGETS; i++)
					if (!strcmp(argv[optind], ebt_standard_targets[i])) {
						policy = -i -1;
						if (policy == EBT_CONTINUE)
							ebt_print_error2("Wrong policy: '%s'", argv[optind]);
						break;
					}
				optind++;
			}
			break;
		case 'L': /* List */
		case 'F': /* Flush */
		case 'Z': /* Zero counters */
			if (c == 'Z') {
				if ((replace->flags & OPT_ZERO) || (replace->flags & OPT_COMMAND && replace->command != 'L'))
print_zero:
					ebt_print_error2("Command -Z only allowed together with command -L");
				replace->flags |= OPT_ZERO;
			} else {
				replace->command = c;
				if (replace->flags & OPT_COMMAND)
					ebt_print_error2("Multiple commands are not allowed");
				replace->flags |= OPT_COMMAND;
				if (replace->flags & OPT_ZERO)
					goto print_zero;
			}

#ifdef SILENT_DAEMON
			if (c== 'L' && exec_style == EXEC_STYLE_DAEMON)
				ebt_print_error2("-L not supported in daemon mode not supported in daemon mode");
#endif

			if (!(replace->flags & OPT_KERNELDATA))
				ebt_get_kernel_table(replace, 0);
			i = -1;
			if (optind < argc && argv[optind][0] != '-') {
				if ((i = ebt_get_chainnr(replace, argv[optind])) == -1)
					ebt_print_error2("Chain %s doesn't exist", argv[optind]);
				optind++;
			}
			if (i != -1) {
				if (c == 'Z')
					zerochain = i;
				else
					replace->selected_chain = i;
			}
			break;
		case 'V': /* Version */
			replace->command = 'V';
			if (OPT_COMMANDS)
				ebt_print_error2("Multiple commands are not allowed");
			if (exec_style == EXEC_STYLE_DAEMON)
				ebt_print_error2(PROGNAME" v"PROGVERSION" ("PROGDATE")\n");
			PRINT_VERSION;
			exit(0);
		case 'M': /* Modprobe */
			if (OPT_COMMANDS)
				ebt_print_error2("Please put the -M option earlier");
			ebt_modprobe = optarg;
			break;
		case 'h': /* Help */
#ifdef SILENT_DAEMON
			if (exec_style == EXEC_STYLE_DAEMON)
				ebt_print_error2("-h not supported in daemon mode");
#endif
			if (OPT_COMMANDS)
				ebt_print_error2("Multiple commands are not allowed");
			replace->command = 'h';

			/* All other arguments should be extension names */
			while (optind < argc) {
				struct ebt_u_match *m;
				struct ebt_u_watcher *w;

				if (!strcasecmp("list_extensions", argv[optind])) {
					ebt_list_extensions();
					exit(0);
				}
				if ((m = ebt_find_match(argv[optind])))
					ebt_add_match(new_entry, m);
				else if ((w = ebt_find_watcher(argv[optind])))
					ebt_add_watcher(new_entry, w);
				else {
					if (!(t = ebt_find_target(argv[optind])))
						ebt_print_error2("Extension %s not found", argv[optind]);
					if (replace->flags & OPT_JUMP)
						ebt_print_error2("Sorry, you can only see help for one target extension at a time");
					replace->flags |= OPT_JUMP;
					new_entry->t = (struct ebt_entry_target *)t;
				}
				optind++;
			}
			break;
		case 't': /* Table */
			if (replace->command != 'h')
				ebt_print_error2("Please put the -t option first");
			ebt_check_option2(&(replace->flags), OPT_TABLE);
			if (strlen(optarg) > EBT_TABLE_MAXNAMELEN - 1)
				ebt_print_error2("Table name too long");
			strcpy(replace->name, optarg);
			break;
		case 'i': /* Input interface */
		case 2  : /* Logical input interface */
		case 'o': /* Output interface */
		case 3  : /* Logical output interface */
		case 'j': /* Target */
		case 'p': /* Net family protocol */
		case 's': /* Source mac */
		case 'd': /* Destination mac */
		case 'c': /* Set counters */
			if (!OPT_COMMANDS)
				ebt_print_error2("No command specified");
			if (replace->command != 'A' && replace->command != 'D' && replace->command != 'I')
				ebt_print_error2("Command and option do not match");
			if (c == 'i') {
				ebt_check_option2(&(replace->flags), OPT_IN);
				if (replace->selected_chain > 2 && replace->selected_chain < NF_BR_BROUTING)
					ebt_print_error2("Use -i only in INPUT, FORWARD, PREROUTING and BROUTING chains");
				if (ebt_check_inverse2(optarg))
					new_entry->invflags |= EBT_IIN;

				if (strlen(optarg) >= IFNAMSIZ)
					ebt_print_error2("Interface name length must be less than %d", IFNAMSIZ);
				strcpy(new_entry->in, optarg);
				if (parse_iface(new_entry->in, "-i"))
					return -1;
				break;
			} else if (c == 2) {
				ebt_check_option2(&(replace->flags), OPT_LOGICALIN);
				if (replace->selected_chain > 2 && replace->selected_chain < NF_BR_BROUTING)
					ebt_print_error2("Use --logical-in only in INPUT, FORWARD, PREROUTING and BROUTING chains");
				if (ebt_check_inverse2(optarg))
					new_entry->invflags |= EBT_ILOGICALIN;

				if (strlen(optarg) >= IFNAMSIZ)
					ebt_print_error2("Interface name length must be less than %d", IFNAMSIZ);
				strcpy(new_entry->logical_in, optarg);
				if (parse_iface(new_entry->logical_in, "--logical-in"))
					return -1;
				break;
			} else if (c == 'o') {
				ebt_check_option2(&(replace->flags), OPT_OUT);
				if (replace->selected_chain < 2 || replace->selected_chain == NF_BR_BROUTING)
					ebt_print_error2("Use -o only in OUTPUT, FORWARD and POSTROUTING chains");
				if (ebt_check_inverse2(optarg))
					new_entry->invflags |= EBT_IOUT;

				if (strlen(optarg) >= IFNAMSIZ)
					ebt_print_error2("Interface name length must be less than %d", IFNAMSIZ);
				strcpy(new_entry->out, optarg);
				if (parse_iface(new_entry->out, "-o"))
					return -1;
				break;
			} else if (c == 3) {
				ebt_check_option2(&(replace->flags), OPT_LOGICALOUT);
				if (replace->selected_chain < 2)
					ebt_print_error2("Use --logical-out only in OUTPUT, FORWARD and POSTROUTING chains");
				if (ebt_check_inverse2(optarg))
					new_entry->invflags |= EBT_ILOGICALOUT;

				if (strlen(optarg) >= IFNAMSIZ)
					ebt_print_error2("Interface name length must be less than %d", IFNAMSIZ);
				strcpy(new_entry->logical_out, optarg);
				if (parse_iface(new_entry->logical_out, "--logical-out"))
					return -1;    
				break;
			} else if (c == 'j') {
				ebt_check_option2(&(replace->flags), OPT_JUMP);
				for (i = 0; i < NUM_STANDARD_TARGETS; i++)
					if (!strcmp(optarg, ebt_standard_targets[i])) {
						t = ebt_find_target(EBT_STANDARD_TARGET);
						((struct ebt_standard_target *) t->t)->verdict = -i - 1;
						break;
					}
				if (-i - 1 == EBT_RETURN && replace->selected_chain < NF_BR_NUMHOOKS) {
					ebt_print_error2("Return target only for user defined chains");
				} else if (i != NUM_STANDARD_TARGETS)
					break;

				if ((i = ebt_get_chainnr(replace, optarg)) != -1) {
					if (i < NF_BR_NUMHOOKS)
						ebt_print_error2("Don't jump to a standard chain");
					t = ebt_find_target(EBT_STANDARD_TARGET);
					((struct ebt_standard_target *) t->t)->verdict = i - NF_BR_NUMHOOKS;
					break;
				} else {
					/* Must be an extension then */
					struct ebt_u_target *t;

					t = ebt_find_target(optarg);
					/* -j standard not allowed either */
					if (!t || t == (struct ebt_u_target *)new_entry->t)
						ebt_print_error2("Illegal target name");
					new_entry->t = (struct ebt_entry_target *)t;
					ebt_find_target(EBT_STANDARD_TARGET)->used = 0;
					t->used = 1;
				}
				break;
			} else if (c == 's') {
				ebt_check_option2(&(replace->flags), OPT_SOURCE);
				if (ebt_check_inverse2(optarg))
					new_entry->invflags |= EBT_ISOURCE;

				if (ebt_get_mac_and_mask(optarg, new_entry->sourcemac, new_entry->sourcemsk))
					ebt_print_error2("Problem with specified source mac");
				new_entry->bitmask |= EBT_SOURCEMAC;
				break;
			} else if (c == 'd') {
				ebt_check_option2(&(replace->flags), OPT_DEST);
				if (ebt_check_inverse2(optarg))
					new_entry->invflags |= EBT_IDEST;

				if (ebt_get_mac_and_mask(optarg, new_entry->destmac, new_entry->destmsk))
					ebt_print_error2("Problem with specified destination mac");
				new_entry->bitmask |= EBT_DESTMAC;
				break;
			} else if (c == 'c') {
				ebt_check_option2(&(replace->flags), OPT_COUNT);
				if (ebt_check_inverse2(optarg))
					ebt_print_error2("Unexpected '!' after -c");
				if (optind >= argc)
					ebt_print_error2("Option -c needs 2 arguments");

				new_entry->cnt.pcnt = strtoull(optarg, &buffer, 10);
				if (*buffer != '\0')
					ebt_print_error2("Packet counter '%s' invalid", optarg)
				new_entry->cnt.bcnt = strtoull(argv[optind], &buffer, 10);
				if (*buffer != '\0')
					ebt_print_error2("Packet counter '%s' invalid", argv[optind])
				optind++;
				break;
			}
			ebt_check_option2(&(replace->flags), OPT_PROTOCOL);
			if (ebt_check_inverse2(optarg))
				new_entry->invflags |= EBT_IPROTO;

			new_entry->bitmask &= ~((unsigned int)EBT_NOPROTO);
			i = strtol(optarg, &buffer, 16);
			if (*buffer == '\0' && (i < 0 || i > 0xFFFF))
				ebt_print_error2("Problem with the specified protocol");
			if (*buffer != '\0') {
				struct ethertypeent *ent;

				if (!strcasecmp(optarg, "LENGTH")) {
					new_entry->bitmask |= EBT_802_3;
					break;
				}
				ent = getethertypebyname(optarg);
				if (!ent)
					ebt_print_error2("Problem with the specified Ethernet protocol (%s), perhaps "_PATH_ETHERTYPES " is missing", optarg)
				new_entry->ethproto = ent->e_ethertype;
			} else
				new_entry->ethproto = i;

			if (new_entry->ethproto < 0x0600)
				ebt_print_error2("Sorry, protocols have values above or equal to 0x0600");
			break;
		case 4  : /* Lc */
#ifdef SILENT_DAEMON
			if (exec_style == EXEC_STYLE_DAEMON)
				ebt_print_error2("--Lc is not supported in daemon mode");
#endif
			ebt_check_option2(&(replace->flags), LIST_C);
			if (replace->command != 'L')
				ebt_print_error("Use --Lc with -L");
			replace->flags |= LIST_C;
			break;
		case 5  : /* Ln */
#ifdef SILENT_DAEMON
			if (exec_style == EXEC_STYLE_DAEMON)
				ebt_print_error2("--Ln is not supported in daemon mode");
#endif
			ebt_check_option2(&(replace->flags), LIST_N);
			if (replace->command != 'L')
				ebt_print_error2("Use --Ln with -L");
			if (replace->flags & LIST_X)
				ebt_print_error2("--Lx is not compatible with --Ln");
			replace->flags |= LIST_N;
			break;
		case 6  : /* Lx */
#ifdef SILENT_DAEMON
			if (exec_style == EXEC_STYLE_DAEMON)
				ebt_print_error2("--Lx is not supported in daemon mode");
#endif
			ebt_check_option2(&(replace->flags), LIST_X);
			if (replace->command != 'L')
				ebt_print_error2("Use --Lx with -L");
			if (replace->flags & LIST_N)
				ebt_print_error2("--Lx is not compatible with --Ln");
			replace->flags |= LIST_X;
			break;
		case 12 : /* Lmac2 */
#ifdef SILENT_DAEMON
			if (exec_style == EXEC_STYLE_DAEMON)
				ebt_print_error("--Lmac2 is not supported in daemon mode");
#endif
			ebt_check_option2(&(replace->flags), LIST_MAC2);
			if (replace->command != 'L')
				ebt_print_error2("Use --Lmac2 with -L");
			replace->flags |= LIST_MAC2;
			break;
		case 8 : /* atomic-commit */
			if (exec_style == EXEC_STYLE_DAEMON)
				ebt_print_error2("--atomic-commit is not supported in daemon mode");
			replace->command = c;
			if (OPT_COMMANDS)
				ebt_print_error2("Multiple commands are not allowed");
			replace->flags |= OPT_COMMAND;
			if (!replace->filename)
				ebt_print_error2("No atomic file specified");
			/* Get the information from the file */
			ebt_get_table(replace, 0);
			/* We don't want the kernel giving us its counters,
			 * they would overwrite the counters extracted from
			 * the file */
			replace->num_counters = 0;
			/* Make sure the table will be written to the kernel */
			free(replace->filename);
			replace->filename = NULL;
			break;
		case 7 : /* atomic-init */
		case 10: /* atomic-save */
		case 11: /* init-table */
			if (exec_style == EXEC_STYLE_DAEMON) {
				if (c == 7) {
					ebt_print_error2("--atomic-init is not supported in daemon mode");
				} else if (c == 10)
					ebt_print_error2("--atomic-save is not supported in daemon mode");
				ebt_print_error2("--init-table is not supported in daemon mode");
			}
			replace->command = c;
			if (OPT_COMMANDS)
				ebt_print_error2("Multiple commands are not allowed");
			if (c != 11 && !replace->filename)
				ebt_print_error2("No atomic file specified");
			replace->flags |= OPT_COMMAND;
			{
				char *tmp = replace->filename;
				int init = 1;

				if (c == 10)
					init = 0;
				/* Get the kernel table */
				replace->filename = NULL;
				ebt_get_kernel_table(replace, init);
				replace->filename = tmp;
			}
			break;
		case 9 : /* atomic */
			if (exec_style == EXEC_STYLE_DAEMON)
				ebt_print_error2("--atomic is not supported in daemon mode");
			if (OPT_COMMANDS)
				ebt_print_error2("--atomic has to come before the command");
			/* A possible memory leak here, but this is not
			 * executed in daemon mode */
			replace->filename = (char *)malloc(strlen(optarg) + 1);
			strcpy(replace->filename, optarg);
			break;
		case 1 :
			if (!strcmp(optarg, "!"))
				ebt_check_inverse2(optarg);
			else
				ebt_print_error2("Bad argument : %s", optarg);
			/* ebt_check_inverse() did optind++ */
			optind--;
			continue;
		default:
			/* Is it a target option? */
			t = (struct ebt_u_target *)new_entry->t;
			if ((t->parse(c - t->option_offset, argv, argc, new_entry, &t->flags, &t->t))) {
				if (ebt_errormsg[0] != '\0')
					return -1;
				goto check_extension;
			}

			/* Is it a match_option? */
			for (m = ebt_matches; m; m = m->next)
				if (m->parse(c - m->option_offset, argv, argc, new_entry, &m->flags, &m->m))
					break;

			if (m != NULL) {
				if (ebt_errormsg[0] != '\0')
					return -1;
				if (m->used == 0) {
					ebt_add_match(new_entry, m);
					m->used = 1;
				}
				goto check_extension;
			}

			/* Is it a watcher option? */
			for (w = ebt_watchers; w; w = w->next)
				if (w->parse(c-w->option_offset, argv, argc, new_entry, &w->flags, &w->w))
					break;

			if (w == NULL)
				ebt_print_error2("Unknown argument: '%s', %c, '%c'", argv[optind - 1], (char)optopt, (char)c);
			if (ebt_errormsg[0] != '\0')
				return -1;
			if (w->used == 0) {
				ebt_add_watcher(new_entry, w);
				w->used = 1;
			}
check_extension:
			if (replace->command != 'A' && replace->command != 'I' && replace->command != 'D')
				ebt_print_error2("Extensions only for -A, -I and -D");
		}
		ebt_invert = 0;
	}

	/* Just in case we didn't catch an error */
	if (ebt_errormsg[0] != '\0')
		return -1;

	if (!(table = ebt_find_table(replace->name)))
		ebt_print_error2("Bad table name");

	if (replace->command == 'h' && !(replace->flags & OPT_ZERO)) {
		print_help();
		if (exec_style == EXEC_STYLE_PRG)
			exit(0);
	}

	/* Do the final checks */
	if (replace->command == 'A' || replace->command == 'I' ||
	   replace->command == 'D' || replace->command == 'C') {
		/* This will put the hook_mask right for the chains */
		ebt_check_for_loops(replace);
		if (ebt_errormsg[0] != '\0')
			return -1;
		entries = ebt_to_chain(replace);
		m_l = new_entry->m_list;
		w_l = new_entry->w_list;
		t = (struct ebt_u_target *)new_entry->t;
		while (m_l) {
			m = (struct ebt_u_match *)(m_l->m);
			m->final_check(new_entry, m->m, replace->name,
			   entries->hook_mask, 0);
			if (ebt_errormsg[0] != '\0')
				return -1;
			m_l = m_l->next;
		}
		while (w_l) {
			w = (struct ebt_u_watcher *)(w_l->w);
			w->final_check(new_entry, w->w, replace->name,
			   entries->hook_mask, 0);
			if (ebt_errormsg[0] != '\0')
				return -1;
			w_l = w_l->next;
		}
		t->final_check(new_entry, t->t, replace->name,
		   entries->hook_mask, 0);
		if (ebt_errormsg[0] != '\0')
			return -1;
	}
	/* So, the extensions can work with the host endian.
	 * The kernel does not have to do this of course */
	new_entry->ethproto = htons(new_entry->ethproto);

	if (replace->command == 'P') {
		if (replace->selected_chain < NF_BR_NUMHOOKS && policy == EBT_RETURN)
			ebt_print_error2("Policy RETURN only allowed for user defined chains");
		ebt_change_policy(replace, policy);
		if (ebt_errormsg[0] != '\0')
			return -1;
	} else if (replace->command == 'L') {
		list_rules();
		if (!(replace->flags & OPT_ZERO) && exec_style == EXEC_STYLE_PRG)
			exit(0);
	}
	if (replace->flags & OPT_ZERO) {
		replace->selected_chain = zerochain;
		ebt_zero_counters(replace);
	} else if (replace->command == 'F') {
		ebt_flush_chains(replace);
	} else if (replace->command == 'A' || replace->command == 'I') {
		ebt_add_rule(replace, new_entry, rule_nr);
		if (ebt_errormsg[0] != '\0')
			return -1;
		/* Makes undoing the add easier (jumps to delete_the_rule) */
		if (rule_nr <= 0)
			rule_nr--;
		rule_nr_end = rule_nr;

		ebt_check_for_loops(replace);
		if (ebt_errormsg[0] != '\0')
			goto delete_the_rule;

		/* Do the final_check(), for all entries.
		 * This is needed when adding a rule that has a chain target */
		i = -1;
		while (1) {
			struct ebt_u_entry *e;

			i++;
			entries = ebt_nr_to_chain(replace, i);
			if (!entries) {
				if (i < NF_BR_NUMHOOKS)
					continue;
				else
					break;
			}
			e = entries->entries;
			while (e) {
				/* Userspace extensions use host endian */
				e->ethproto = ntohs(e->ethproto);
				ebt_do_final_checks(replace, e, entries);
				if (ebt_errormsg[0] != '\0')
					goto delete_the_rule;
				e->ethproto = htons(e->ethproto);
				e = e->next;
			}
		}
		/* Don't reuse the added rule */
		new_entry = NULL;
	} else if (replace->command == 'D') {
delete_the_rule:
		ebt_delete_rule(replace, new_entry, rule_nr, rule_nr_end);
		if (ebt_errormsg[0] != '\0')
			return -1;
	} else if (replace->command == 'C') {
		ebt_change_counters(replace, new_entry, rule_nr, rule_nr_end, &(new_entry->cnt));
		if (ebt_errormsg[0] != '\0')
			return -1;
	}
	/* Commands -N, -E, -X, --atomic-commit, --atomic-commit, --atomic-save,
	 * --init-table fall through */

	if (ebt_errormsg[0] != '\0')
		return -1;
	if (table->check)
		table->check(replace);

	if (exec_style == EXEC_STYLE_PRG) {/* Implies ebt_errormsg[0] == '\0' */
		ebt_deliver_table(replace);

		if (replace->counterchanges)
			ebt_deliver_counters(replace, exec_style);
	}
	return 0;
}