summaryrefslogtreecommitdiffstats
path: root/src/proto.c
blob: 553b6a447a7e78538661b85e1dbc3ccec41ca2a8 (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
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
/*
 * Protocol header and type definitions and related functions.
 *
 * Copyright (c) 2014 Patrick McHardy <kaber@trash.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */

#include <nft.h>

#include <stddef.h>
#include <net/if_arp.h>
#include <arpa/inet.h>
#include <linux/netfilter.h>

#include <expression.h>
#include <headers.h>
#include <proto.h>
#include <gmputil.h>
#include <utils.h>

const char *proto_base_names[] = {
	[PROTO_BASE_INVALID]		= "invalid",
	[PROTO_BASE_LL_HDR]		= "link layer",
	[PROTO_BASE_NETWORK_HDR]	= "network layer",
	[PROTO_BASE_TRANSPORT_HDR]	= "transport layer",
	[PROTO_BASE_INNER_HDR]		= "payload data",
};

const char *proto_base_tokens[] = {
	[PROTO_BASE_INVALID]		= "invalid",
	[PROTO_BASE_LL_HDR]		= "ll",
	[PROTO_BASE_NETWORK_HDR]	= "nh",
	[PROTO_BASE_TRANSPORT_HDR]	= "th",
	[PROTO_BASE_INNER_HDR]		= "ih",
};

const struct proto_hdr_template proto_unknown_template =
	PROTO_HDR_TEMPLATE("unknown", &invalid_type, BYTEORDER_INVALID, 0, 0);

const struct proto_desc proto_unknown = {
	.name		= "unknown",
	.base		= PROTO_BASE_INVALID,
};

/**
 * proto_find_upper - find higher layer protocol description by protocol value
 * 		      linking it to the lower layer protocol
 *
 * @base:	lower layer protocol description
 * @num:	protocol value
 */
const struct proto_desc *
proto_find_upper(const struct proto_desc *base, unsigned int num)
{
	unsigned int i;

	for (i = 0; i < array_size(base->protocols); i++) {
		if (!base->protocols[i].desc)
			break;
		if (base->protocols[i].num == num)
			return base->protocols[i].desc;
	}
	return NULL;
}

/**
 * proto_find_num - return protocol number linking two protocols together
 *
 * @base:	lower layer protocol description
 * @desc:	upper layer protocol description
 */
int proto_find_num(const struct proto_desc *base,
		   const struct proto_desc *desc)
{
	unsigned int i;

	for (i = 0; i < array_size(base->protocols); i++) {
		if (!base->protocols[i].desc)
			break;
		if (base->protocols[i].desc == desc)
			return base->protocols[i].num;
	}
	return -1;
}

static const struct proto_desc *inner_protocols[] = {
	&proto_vxlan,
	&proto_geneve,
	&proto_gre,
	&proto_gretap,
};

const struct proto_desc *proto_find_inner(uint32_t type, uint32_t hdrsize,
					  uint32_t flags)
{
	const struct proto_desc *desc;
	unsigned int i;

	for (i = 0; i < array_size(inner_protocols); i++) {
		desc = inner_protocols[i];
		if (desc->inner.type == type &&
		    desc->inner.hdrsize == hdrsize &&
		    desc->inner.flags == flags)
			return inner_protocols[i];
	}

	return &proto_unknown;
}

static const struct dev_proto_desc dev_proto_desc[] = {
	DEV_PROTO_DESC(ARPHRD_ETHER, &proto_eth),
};

/**
 * proto_dev_type - return arphrd type linking a device and a protocol together
 *
 * @desc:	the protocol description
 * @res:	pointer to result
 */
int proto_dev_type(const struct proto_desc *desc, uint16_t *res)
{
	const struct proto_desc *base;
	unsigned int i, j;

	for (i = 0; i < array_size(dev_proto_desc); i++) {
		base = dev_proto_desc[i].desc;
		if (base == desc) {
			*res = dev_proto_desc[i].type;
			return 0;
		}
		for (j = 0; j < array_size(base->protocols); j++) {
			if (!base->protocols[j].desc)
				break;
			if (base->protocols[j].desc == desc) {
				*res = dev_proto_desc[i].type;
				return 0;
			}
		}
	}
	return -1;
}

/**
 * proto_dev_desc - return protocol description for an arphrd type
 *
 * @type:	the arphrd type
 */
const struct proto_desc *proto_dev_desc(uint16_t type)
{
	unsigned int i;

	for (i = 0; i < array_size(dev_proto_desc); i++) {
		if (dev_proto_desc[i].type == type)
			return dev_proto_desc[i].desc;
	}
	return NULL;
}

const struct hook_proto_desc hook_proto_desc[] = {
	[NFPROTO_BRIDGE]	= HOOK_PROTO_DESC(PROTO_BASE_LL_HDR,	  &proto_eth),
	[NFPROTO_NETDEV]	= HOOK_PROTO_DESC(PROTO_BASE_LL_HDR,	  &proto_netdev),
	[NFPROTO_INET]		= HOOK_PROTO_DESC(PROTO_BASE_LL_HDR,	  &proto_inet),
	[NFPROTO_IPV4]		= HOOK_PROTO_DESC(PROTO_BASE_NETWORK_HDR, &proto_ip),
	[NFPROTO_IPV6]		= HOOK_PROTO_DESC(PROTO_BASE_NETWORK_HDR, &proto_ip6),
	[NFPROTO_ARP]		= HOOK_PROTO_DESC(PROTO_BASE_NETWORK_HDR, &proto_arp),
};

static void proto_ctx_debug(const struct proto_ctx *ctx, enum proto_bases base,
			    unsigned int debug_mask)
{
	unsigned int i;

	if (!(debug_mask & NFT_DEBUG_PROTO_CTX))
		return;

	if (base == PROTO_BASE_LL_HDR && ctx->stacked_ll_count) {
		pr_debug(" saved ll headers:");
		for (i = 0; i < ctx->stacked_ll_count; i++)
			pr_debug(" %s", ctx->stacked_ll[i]->name);
	}

	pr_debug("update %s protocol context%s:\n",
		 proto_base_names[base], ctx->inner ? " (inner)" : "");

	for (i = PROTO_BASE_LL_HDR; i <= PROTO_BASE_MAX; i++) {
		pr_debug(" %-20s: %s",
			 proto_base_names[i],
			 ctx->protocol[i].desc ? ctx->protocol[i].desc->name :
						 "none");
		if (i == base)
			pr_debug(" <-");
		pr_debug("\n");
	}
	pr_debug("\n");
}

/**
 * proto_ctx_init - initialize protocol context for a given hook family
 *
 * @ctx:	protocol context
 * @family:	hook family
 * @debug_mask:	display debugging information
 */
void proto_ctx_init(struct proto_ctx *ctx, unsigned int family,
		    unsigned int debug_mask, bool inner)
{
	const struct hook_proto_desc *h = &hook_proto_desc[family];

	memset(ctx, 0, sizeof(*ctx));
	ctx->family = family;
	ctx->protocol[h->base].desc = h->desc;
	ctx->debug_mask = debug_mask;
	ctx->inner = inner;

	proto_ctx_debug(ctx, h->base, debug_mask);
}

/**
 * proto_ctx_update: update protocol context for given protocol base
 *
 * @ctx:	protocol context
 * @base:	protocol base
 * @loc:	location of the relational expression definiting the context
 * @desc:	protocol description for the given layer
 */
void proto_ctx_update(struct proto_ctx *ctx, enum proto_bases base,
		      const struct location *loc,
		      const struct proto_desc *desc)
{
	bool found = false;
	unsigned int i;

	switch (base) {
	case PROTO_BASE_LL_HDR:
	case PROTO_BASE_NETWORK_HDR:
		break;
	case PROTO_BASE_TRANSPORT_HDR:
		if (ctx->protocol[base].num_protos >= PROTO_CTX_NUM_PROTOS)
			break;

		for (i = 0; i < ctx->protocol[base].num_protos; i++) {
			if (ctx->protocol[base].protos[i].desc == desc) {
				found = true;
				break;
			}
		}
		if (!found) {
			i = ctx->protocol[base].num_protos++;
			ctx->protocol[base].protos[i].desc = desc;
			ctx->protocol[base].protos[i].location = *loc;
		}
		break;
	case PROTO_BASE_INNER_HDR:
		break;
	default:
		BUG("unknown protocol base %d", base);
	}

	ctx->protocol[base].location	= *loc;
	ctx->protocol[base].desc	= desc;

	proto_ctx_debug(ctx, base, ctx->debug_mask);
}

bool proto_ctx_is_ambiguous(struct proto_ctx *ctx, enum proto_bases base)
{
	return ctx->protocol[base].num_protos > 1;
}

const struct proto_desc *proto_ctx_find_conflict(struct proto_ctx *ctx,
						 enum proto_bases base,
						 const struct proto_desc *desc)
{
	unsigned int i;

	switch (base) {
	case PROTO_BASE_LL_HDR:
	case PROTO_BASE_NETWORK_HDR:
		if (desc != ctx->protocol[base].desc)
			return ctx->protocol[base].desc;
		break;
	case PROTO_BASE_TRANSPORT_HDR:
		for (i = 0; i < ctx->protocol[base].num_protos; i++) {
			if (desc != ctx->protocol[base].protos[i].desc)
				return ctx->protocol[base].protos[i].desc;
		}
		break;
	default:
		BUG("unknown protocol base %d", base);
	}

	return NULL;
}

#define HDR_TEMPLATE(__name, __dtype, __type, __member)			\
	PROTO_HDR_TEMPLATE(__name, __dtype,				\
			   BYTEORDER_BIG_ENDIAN,			\
			   offsetof(__type, __member) * 8,		\
			   field_sizeof(__type, __member) * 8)

#define HDR_FIELD(__name, __struct, __member)				\
	HDR_TEMPLATE(__name, &integer_type, __struct, __member)
#define HDR_HEX_FIELD(__name, __struct, __member)				\
	HDR_TEMPLATE(__name, &xinteger_type, __struct, __member)
#define HDR_BITFIELD(__name, __dtype,  __offset, __len)			\
	PROTO_HDR_TEMPLATE(__name, __dtype, BYTEORDER_BIG_ENDIAN,	\
			   __offset, __len)
#define HDR_TYPE(__name, __dtype, __struct, __member)			\
	HDR_TEMPLATE(__name, __dtype, __struct, __member)

#define INET_PROTOCOL(__name, __struct, __member)			\
	HDR_TYPE(__name, &inet_protocol_type, __struct, __member)
#define INET_SERVICE(__name, __struct, __member)			\
	HDR_TYPE(__name, &inet_service_type, __struct, __member)

/*
 * AH
 */

#define AHHDR_FIELD(__name, __member) \
	HDR_FIELD(__name, struct ip_auth_hdr, __member)

const struct proto_desc proto_ah = {
	.name		= "ah",
	.id		= PROTO_DESC_AH,
	.base		= PROTO_BASE_TRANSPORT_HDR,
	.protocol_key	= AHHDR_NEXTHDR,
	.protocols	= {
		PROTO_LINK(IPPROTO_ESP,		&proto_esp),
		PROTO_LINK(IPPROTO_AH,		&proto_ah),
		PROTO_LINK(IPPROTO_COMP,	&proto_comp),
		PROTO_LINK(IPPROTO_UDP,		&proto_udp),
		PROTO_LINK(IPPROTO_UDPLITE,	&proto_udplite),
		PROTO_LINK(IPPROTO_TCP,		&proto_tcp),
		PROTO_LINK(IPPROTO_DCCP,	&proto_dccp),
		PROTO_LINK(IPPROTO_SCTP,	&proto_sctp),
	},
	.templates	= {
		[AHHDR_NEXTHDR]		= INET_PROTOCOL("nexthdr", struct ip_auth_hdr, nexthdr),
		[AHHDR_HDRLENGTH]	= AHHDR_FIELD("hdrlength", hdrlen),
		[AHHDR_RESERVED]	= AHHDR_FIELD("reserved", reserved),
		[AHHDR_SPI]		= AHHDR_FIELD("spi", spi),
		[AHHDR_SEQUENCE]	= AHHDR_FIELD("sequence", seq_no),
	},
	.format		= {
		.order	= {
			AHHDR_SPI, AHHDR_HDRLENGTH, AHHDR_NEXTHDR,
		},
		.filter	= (1 << AHHDR_RESERVED) | (1 << AHHDR_SEQUENCE)
	},
};

/*
 * ESP
 */

#define ESPHDR_FIELD(__name, __member) \
	HDR_FIELD(__name, struct ip_esp_hdr, __member)

const struct proto_desc proto_esp = {
	.name		= "esp",
	.id		= PROTO_DESC_ESP,
	.base		= PROTO_BASE_TRANSPORT_HDR,
	.templates	= {
		[ESPHDR_SPI]		= ESPHDR_FIELD("spi", spi),
		[ESPHDR_SEQUENCE]	= ESPHDR_FIELD("sequence", seq_no),
	},
};

/*
 * IPCOMP
 */

#define COMPHDR_FIELD(__name, __member) \
	HDR_FIELD(__name, struct ip_comp_hdr, __member)

const struct proto_desc proto_comp = {
	.name		= "comp",
	.id		= PROTO_DESC_COMP,
	.base		= PROTO_BASE_TRANSPORT_HDR,
	.protocol_key	= COMPHDR_NEXTHDR,
	.protocols	= {
		PROTO_LINK(IPPROTO_ESP,		&proto_esp),
		PROTO_LINK(IPPROTO_AH,		&proto_ah),
		PROTO_LINK(IPPROTO_COMP,	&proto_comp),
		PROTO_LINK(IPPROTO_UDP,		&proto_udp),
		PROTO_LINK(IPPROTO_UDPLITE,	&proto_udplite),
		PROTO_LINK(IPPROTO_TCP,		&proto_tcp),
		PROTO_LINK(IPPROTO_DCCP,	&proto_dccp),
		PROTO_LINK(IPPROTO_SCTP,	&proto_sctp),
	},
	.templates	= {
		[COMPHDR_NEXTHDR]	= INET_PROTOCOL("nexthdr", struct ip_comp_hdr, nexthdr),
		[COMPHDR_FLAGS]		= HDR_TEMPLATE("flags", &bitmask_type, struct ip_comp_hdr, flags),
		[COMPHDR_CPI]		= COMPHDR_FIELD("cpi", cpi),
	},
};

/*
 * ICMP
 */

#include <netinet/ip_icmp.h>

static const struct symbol_table icmp_type_tbl = {
	.base		= BASE_DECIMAL,
	.symbols	= {
		SYMBOL("echo-reply",			ICMP_ECHOREPLY),
		SYMBOL("destination-unreachable",	ICMP_DEST_UNREACH),
		SYMBOL("source-quench",			ICMP_SOURCE_QUENCH),
		SYMBOL("redirect",			ICMP_REDIRECT),
		SYMBOL("echo-request",			ICMP_ECHO),
		SYMBOL("router-advertisement",		ICMP_ROUTERADVERT),
		SYMBOL("router-solicitation",		ICMP_ROUTERSOLICIT),
		SYMBOL("time-exceeded",			ICMP_TIME_EXCEEDED),
		SYMBOL("parameter-problem",		ICMP_PARAMETERPROB),
		SYMBOL("timestamp-request",		ICMP_TIMESTAMP),
		SYMBOL("timestamp-reply",		ICMP_TIMESTAMPREPLY),
		SYMBOL("info-request",			ICMP_INFO_REQUEST),
		SYMBOL("info-reply",			ICMP_INFO_REPLY),
		SYMBOL("address-mask-request",		ICMP_ADDRESS),
		SYMBOL("address-mask-reply",		ICMP_ADDRESSREPLY),
		SYMBOL_LIST_END
	},
};

const struct datatype icmp_type_type = {
	.type		= TYPE_ICMP_TYPE,
	.name		= "icmp_type",
	.desc		= "ICMP type",
	.byteorder	= BYTEORDER_BIG_ENDIAN,
	.size		= BITS_PER_BYTE,
	.basetype	= &integer_type,
	.sym_tbl	= &icmp_type_tbl,
};

#define ICMP46HDR_FIELD(__token, __dtype, __struct, __member, __dep)		\
	{									\
		.token		= (__token),					\
		.dtype		= &__dtype,					\
		.byteorder	= BYTEORDER_BIG_ENDIAN,				\
		.offset		= offsetof(__struct, __member) * 8,		\
		.len		= field_sizeof(__struct, __member) * 8,		\
		.icmp_dep	= (__dep),					\
	}

#define ICMPHDR_FIELD(__token, __member, __dep) \
	ICMP46HDR_FIELD(__token, integer_type, struct icmphdr, __member, __dep)

#define ICMPHDR_TYPE(__name, __type, __member) \
	HDR_TYPE(__name,  __type, struct icmphdr, __member)

const struct proto_desc proto_icmp = {
	.name		= "icmp",
	.id		= PROTO_DESC_ICMP,
	.base		= PROTO_BASE_TRANSPORT_HDR,
	.protocol_key	= ICMPHDR_TYPE,
	.checksum_key	= ICMPHDR_CHECKSUM,
	.checksum_type  = NFT_PAYLOAD_CSUM_INET,
	.templates	= {
		[ICMPHDR_TYPE]		= ICMPHDR_TYPE("type", &icmp_type_type, type),
		[ICMPHDR_CODE]		= ICMPHDR_TYPE("code", &icmp_code_type, code),
		[ICMPHDR_CHECKSUM]	= ICMPHDR_FIELD("checksum", checksum, PROTO_ICMP_ANY),
		[ICMPHDR_ID]		= ICMPHDR_FIELD("id", un.echo.id, PROTO_ICMP_ECHO),
		[ICMPHDR_SEQ]		= ICMPHDR_FIELD("sequence", un.echo.sequence, PROTO_ICMP_ECHO),
		[ICMPHDR_GATEWAY]	= ICMPHDR_FIELD("gateway", un.gateway, PROTO_ICMP_ADDRESS),
		[ICMPHDR_MTU]		= ICMPHDR_FIELD("mtu", un.frag.mtu, PROTO_ICMP_MTU),
	},
};

/*
 * IGMP
 */

#include <netinet/igmp.h>

#ifndef IGMP_V3_MEMBERSHIP_REPORT
#define IGMP_V3_MEMBERSHIP_REPORT	0x22
#endif

static const struct symbol_table igmp_type_tbl = {
	.base		= BASE_DECIMAL,
	.symbols	= {
		SYMBOL("membership-query",		IGMP_MEMBERSHIP_QUERY),
		SYMBOL("membership-report-v1",		IGMP_V1_MEMBERSHIP_REPORT),
		SYMBOL("membership-report-v2",		IGMP_V2_MEMBERSHIP_REPORT),
		SYMBOL("membership-report-v3",		IGMP_V3_MEMBERSHIP_REPORT),
		SYMBOL("leave-group",			IGMP_V2_LEAVE_GROUP),
		SYMBOL_LIST_END
	},
};

const struct datatype igmp_type_type = {
	.type		= TYPE_IGMP_TYPE,
	.name		= "igmp_type",
	.desc		= "IGMP type",
	.byteorder	= BYTEORDER_BIG_ENDIAN,
	.size		= BITS_PER_BYTE,
	.basetype	= &integer_type,
	.sym_tbl	= &igmp_type_tbl,
};

#define IGMPHDR_FIELD(__name, __member) \
	HDR_FIELD(__name, struct igmp, __member)
#define IGMPHDR_TYPE(__name, __type, __member) \
	HDR_TYPE(__name, __type, struct igmp, __member)

const struct proto_desc proto_igmp = {
	.name		= "igmp",
	.id		= PROTO_DESC_IGMP,
	.base		= PROTO_BASE_TRANSPORT_HDR,
	.checksum_key	= IGMPHDR_CHECKSUM,
	.checksum_type  = NFT_PAYLOAD_CSUM_INET,
	.templates	= {
		[IGMPHDR_TYPE]		= IGMPHDR_TYPE("type", &igmp_type_type, igmp_type),
		[IGMPHDR_MRT]		= IGMPHDR_FIELD("mrt", igmp_code),
		[IGMPHDR_CHECKSUM]	= IGMPHDR_FIELD("checksum", igmp_cksum),
		[IGMPHDR_GROUP]		= IGMPHDR_FIELD("group", igmp_group),
	},
};

/*
 * UDP/UDP-Lite
 */

#include <netinet/udp.h>
#define UDPHDR_FIELD(__name, __member) \
	HDR_FIELD(__name, struct udphdr, __member)

const struct proto_desc proto_udp = {
	.name		= "udp",
	.id		= PROTO_DESC_UDP,
	.base		= PROTO_BASE_TRANSPORT_HDR,
	.checksum_key	= UDPHDR_CHECKSUM,
	.checksum_type  = NFT_PAYLOAD_CSUM_INET,
	.templates	= {
		[UDPHDR_SPORT]		= INET_SERVICE("sport", struct udphdr, source),
		[UDPHDR_DPORT]		= INET_SERVICE("dport", struct udphdr, dest),
		[UDPHDR_LENGTH]		= UDPHDR_FIELD("length", len),
		[UDPHDR_CHECKSUM]	= UDPHDR_FIELD("checksum", check),
	},
	.protocols	= {
		PROTO_LINK(0,	&proto_vxlan),
		PROTO_LINK(0,	&proto_geneve),
	},
};

const struct proto_desc proto_udplite = {
	.name		= "udplite",
	.id		= PROTO_DESC_UDPLITE,
	.base		= PROTO_BASE_TRANSPORT_HDR,
	.templates	= {
		[UDPHDR_SPORT]		= INET_SERVICE("sport", struct udphdr, source),
		[UDPHDR_DPORT]		= INET_SERVICE("dport", struct udphdr, dest),
		[UDPHDR_CSUMCOV]	= UDPHDR_FIELD("csumcov", len),
		[UDPHDR_CHECKSUM]	= UDPHDR_FIELD("checksum", check),
	},
};

/*
 * TCP
 */

#include <netinet/tcp.h>

static const struct symbol_table tcp_flag_tbl = {
	.base		= BASE_HEXADECIMAL,
	.symbols	= {
		SYMBOL("fin",	TCP_FLAG_FIN),
		SYMBOL("syn",	TCP_FLAG_SYN),
		SYMBOL("rst",	TCP_FLAG_RST),
		SYMBOL("psh",	TCP_FLAG_PSH),
		SYMBOL("ack",	TCP_FLAG_ACK),
		SYMBOL("urg",	TCP_FLAG_URG),
		SYMBOL("ecn",	TCP_FLAG_ECN),
		SYMBOL("cwr",	TCP_FLAG_CWR),
		SYMBOL_LIST_END
	},
};

const struct datatype tcp_flag_type = {
	.type		= TYPE_TCP_FLAG,
	.name		= "tcp_flag",
	.desc		= "TCP flag",
	.byteorder	= BYTEORDER_BIG_ENDIAN,
	.size		= BITS_PER_BYTE,
	.basetype	= &bitmask_type,
	.sym_tbl	= &tcp_flag_tbl,
};

#define TCPHDR_FIELD(__name, __member) \
	HDR_FIELD(__name, struct tcphdr, __member)

const struct proto_desc proto_tcp = {
	.name		= "tcp",
	.id		= PROTO_DESC_TCP,
	.base		= PROTO_BASE_TRANSPORT_HDR,
	.checksum_key	= TCPHDR_CHECKSUM,
	.checksum_type  = NFT_PAYLOAD_CSUM_INET,
	.templates	= {
		[TCPHDR_SPORT]		= INET_SERVICE("sport", struct tcphdr, source),
		[TCPHDR_DPORT]		= INET_SERVICE("dport", struct tcphdr, dest),
		[TCPHDR_SEQ]		= TCPHDR_FIELD("sequence", seq),
		[TCPHDR_ACKSEQ]		= TCPHDR_FIELD("ackseq", ack_seq),
		[TCPHDR_DOFF]		= HDR_BITFIELD("doff", &integer_type,
						       (12 * BITS_PER_BYTE), 4),
		[TCPHDR_RESERVED]	= HDR_BITFIELD("reserved", &integer_type,
						       (12 * BITS_PER_BYTE) + 4, 4),
		[TCPHDR_FLAGS]		= HDR_BITFIELD("flags", &tcp_flag_type,
						       13 * BITS_PER_BYTE,
						       BITS_PER_BYTE),
		[TCPHDR_WINDOW]		= TCPHDR_FIELD("window", window),
		[TCPHDR_CHECKSUM]	= TCPHDR_FIELD("checksum", check),
		[TCPHDR_URGPTR]		= TCPHDR_FIELD("urgptr", urg_ptr),
	},
	.format		= {
		.filter	= (1 << TCPHDR_SEQ) | (1 << TCPHDR_ACKSEQ) |
			  (1 << TCPHDR_DOFF) | (1 << TCPHDR_RESERVED) |
			  (1 << TCPHDR_URGPTR),
	},
};

/*
 * DCCP
 */

static const struct symbol_table dccp_pkttype_tbl = {
	.base		= BASE_HEXADECIMAL,
	.symbols	= {
		SYMBOL("request",	DCCP_PKT_REQUEST),
		SYMBOL("response",	DCCP_PKT_RESPONSE),
		SYMBOL("data",		DCCP_PKT_DATA),
		SYMBOL("ack",		DCCP_PKT_ACK),
		SYMBOL("dataack",	DCCP_PKT_DATAACK),
		SYMBOL("closereq",	DCCP_PKT_CLOSEREQ),
		SYMBOL("close",		DCCP_PKT_CLOSE),
		SYMBOL("reset",		DCCP_PKT_RESET),
		SYMBOL("sync",		DCCP_PKT_SYNC),
		SYMBOL("syncack",	DCCP_PKT_SYNCACK),
		SYMBOL_LIST_END
	},
};

const struct datatype dccp_pkttype_type = {
	.type		= TYPE_DCCP_PKTTYPE,
	.name		= "dccp_pkttype",
	.desc		= "DCCP packet type",
	.byteorder	= BYTEORDER_INVALID,
	.size		= 4,
	.basetype	= &integer_type,
	.sym_tbl	= &dccp_pkttype_tbl,
};


#define DCCPHDR_FIELD(__name, __member) \
	HDR_FIELD(__name, struct dccp_hdr, __member)

const struct proto_desc proto_dccp = {
	.name		= "dccp",
	.id		= PROTO_DESC_DCCP,
	.base		= PROTO_BASE_TRANSPORT_HDR,
	.templates	= {
		[DCCPHDR_SPORT]		= INET_SERVICE("sport", struct dccp_hdr, dccph_sport),
		[DCCPHDR_DPORT]		= INET_SERVICE("dport", struct dccp_hdr, dccph_dport),
		[DCCPHDR_TYPE]		= HDR_BITFIELD("type", &dccp_pkttype_type,
						       (8 * BITS_PER_BYTE) + 3, 4),
	},
};

/*
 * SCTP
 */

#define SCTPHDR_FIELD(__name, __member) \
	HDR_FIELD(__name, struct sctphdr, __member)

const struct proto_desc proto_sctp = {
	.name		= "sctp",
	.id		= PROTO_DESC_SCTP,
	.base		= PROTO_BASE_TRANSPORT_HDR,
	.checksum_key	= SCTPHDR_CHECKSUM,
	.checksum_type  = NFT_PAYLOAD_CSUM_SCTP,
	.templates	= {
		[SCTPHDR_SPORT]		= INET_SERVICE("sport", struct sctphdr, source),
		[SCTPHDR_DPORT]		= INET_SERVICE("dport", struct sctphdr, dest),
		[SCTPHDR_VTAG]		= SCTPHDR_FIELD("vtag", vtag),
		[SCTPHDR_CHECKSUM]	= SCTPHDR_FIELD("checksum", checksum),
	},
};

/*
 * Dummy Transpor Header (common udp/tcp/dccp/sctp fields)
 */
const struct proto_desc proto_th = {
	.name		= "th",
	.id		= PROTO_DESC_TH,
	.base		= PROTO_BASE_TRANSPORT_HDR,
	.templates	= {
		[THDR_SPORT]		= INET_SERVICE("sport", struct udphdr, source),
		[THDR_DPORT]		= INET_SERVICE("dport", struct udphdr, dest),
	},
};

/*
 * IPv4
 */

#include <netinet/ip.h>

static const struct symbol_table dscp_type_tbl = {
	.base		= BASE_HEXADECIMAL,
	.symbols	= {
		SYMBOL("cs0",	0x00),
		SYMBOL("cs1",	0x08),
		SYMBOL("cs2",	0x10),
		SYMBOL("cs3",	0x18),
		SYMBOL("cs4",	0x20),
		SYMBOL("cs5",	0x28),
		SYMBOL("cs6",	0x30),
		SYMBOL("cs7",	0x38),
		SYMBOL("df",	0x00),
		SYMBOL("be",	0x00),
		SYMBOL("lephb",	0x01),
		SYMBOL("af11",	0x0a),
		SYMBOL("af12",	0x0c),
		SYMBOL("af13",	0x0e),
		SYMBOL("af21",	0x12),
		SYMBOL("af22",	0x14),
		SYMBOL("af23",	0x16),
		SYMBOL("af31",	0x1a),
		SYMBOL("af32",	0x1c),
		SYMBOL("af33",	0x1e),
		SYMBOL("af41",	0x22),
		SYMBOL("af42",	0x24),
		SYMBOL("af43",	0x26),
		SYMBOL("va",	0x2c),
		SYMBOL("ef",	0x2e),
		SYMBOL_LIST_END
	},
};

const struct datatype dscp_type = {
	.type		= TYPE_DSCP,
	.name		= "dscp",
	.desc		= "Differentiated Services Code Point",
	.byteorder	= BYTEORDER_BIG_ENDIAN,
	.size		= 6,
	.basetype	= &integer_type,
	.basefmt	= "0x%.2Zx",
	.sym_tbl	= &dscp_type_tbl,
};

static const struct symbol_table ecn_type_tbl = {
	.base		= BASE_HEXADECIMAL,
	.symbols	= {
		SYMBOL("not-ect",	0x00),
		SYMBOL("ect1",		0x01),
		SYMBOL("ect0",		0x02),
		SYMBOL("ce",		0x03),
		SYMBOL_LIST_END
	},
};

const struct datatype ecn_type = {
	.type		= TYPE_ECN,
	.name		= "ecn",
	.desc		= "Explicit Congestion Notification",
	.byteorder	= BYTEORDER_BIG_ENDIAN,
	.size		= 2,
	.basetype	= &integer_type,
	.basefmt	= "0x%.1Zx",
	.sym_tbl	= &ecn_type_tbl,
};

#define GREHDR_TEMPLATE(__name, __dtype, __member) \
	HDR_TEMPLATE(__name, __dtype, struct grehdr, __member)
#define GREHDR_TYPE(__name, __member) \
	GREHDR_TEMPLATE(__name, &ethertype_type, __member)

const struct proto_desc proto_gre = {
	.name		= "gre",
	.id		= PROTO_DESC_GRE,
	.base		= PROTO_BASE_TRANSPORT_HDR,
	.templates	= {
		[0] = PROTO_META_TEMPLATE("l4proto", &inet_protocol_type, NFT_META_L4PROTO, 8),
		[GREHDR_FLAGS]		= HDR_BITFIELD("flags", &integer_type, 0, 5),
		[GREHDR_VERSION]	= HDR_BITFIELD("version", &integer_type, 13, 3),
		[GREHDR_PROTOCOL]	= HDR_BITFIELD("protocol", &ethertype_type, 16, 16),
	},
	.inner		= {
		.hdrsize	= sizeof(struct grehdr),
		.flags		= NFT_INNER_NH | NFT_INNER_TH,
		.type		= NFT_INNER_GENEVE + 1,
	},
};

const struct proto_desc proto_gretap = {
	.name		= "gretap",
	.id		= PROTO_DESC_GRETAP,
	.base		= PROTO_BASE_TRANSPORT_HDR,
	.templates	= {
		[0] = PROTO_META_TEMPLATE("l4proto", &inet_protocol_type, NFT_META_L4PROTO, 8),
	},
	.inner		= {
		.hdrsize	= sizeof(struct grehdr),
		.flags		= NFT_INNER_LL | NFT_INNER_NH | NFT_INNER_TH,
		.type		= NFT_INNER_GENEVE + 2,
	},
};

#define IPHDR_FIELD(__name, __member) \
	HDR_FIELD(__name, struct iphdr, __member)
#define IPHDR_ADDR(__name, __member) \
	HDR_TYPE(__name, &ipaddr_type, struct iphdr, __member)

const struct proto_desc proto_ip = {
	.name		= "ip",
	.id		= PROTO_DESC_IP,
	.base		= PROTO_BASE_NETWORK_HDR,
	.checksum_key	= IPHDR_CHECKSUM,
	.checksum_type  = NFT_PAYLOAD_CSUM_INET,
	.protocols	= {
		PROTO_LINK(IPPROTO_ICMP,	&proto_icmp),
		PROTO_LINK(IPPROTO_IGMP,	&proto_igmp),
		PROTO_LINK(IPPROTO_ICMPV6,	&proto_icmp6),
		PROTO_LINK(IPPROTO_ESP,		&proto_esp),
		PROTO_LINK(IPPROTO_AH,		&proto_ah),
		PROTO_LINK(IPPROTO_COMP,	&proto_comp),
		PROTO_LINK(IPPROTO_UDP,		&proto_udp),
		PROTO_LINK(IPPROTO_UDPLITE,	&proto_udplite),
		PROTO_LINK(IPPROTO_TCP,		&proto_tcp),
		PROTO_LINK(IPPROTO_DCCP,	&proto_dccp),
		PROTO_LINK(IPPROTO_SCTP,	&proto_sctp),
		PROTO_LINK(IPPROTO_GRE,		&proto_gre),
		PROTO_LINK(IPPROTO_GRE,		&proto_gretap),
	},
	.templates	= {
		[0]	= PROTO_META_TEMPLATE("l4proto", &inet_protocol_type, NFT_META_L4PROTO, 8),
		[IPHDR_VERSION]		= HDR_BITFIELD("version", &integer_type, 0, 4),
		[IPHDR_HDRLENGTH]	= HDR_BITFIELD("hdrlength", &integer_type, 4, 4),
		[IPHDR_DSCP]            = HDR_BITFIELD("dscp", &dscp_type, 8, 6),
		[IPHDR_ECN]		= HDR_BITFIELD("ecn", &ecn_type, 14, 2),
		[IPHDR_LENGTH]		= IPHDR_FIELD("length",		tot_len),
		[IPHDR_ID]		= IPHDR_FIELD("id",		id),
		[IPHDR_FRAG_OFF]	= HDR_HEX_FIELD("frag-off", struct iphdr, frag_off),
		[IPHDR_TTL]		= IPHDR_FIELD("ttl",		ttl),
		[IPHDR_PROTOCOL]	= INET_PROTOCOL("protocol", struct iphdr, protocol),
		[IPHDR_CHECKSUM]	= IPHDR_FIELD("checksum",	check),
		[IPHDR_SADDR]		= IPHDR_ADDR("saddr",		saddr),
		[IPHDR_DADDR]		= IPHDR_ADDR("daddr",		daddr),
	},
	.format		= {
		.order	= {
			IPHDR_SADDR, IPHDR_DADDR, IPHDR_DSCP, IPHDR_ECN,
			IPHDR_TTL, IPHDR_ID, IPHDR_PROTOCOL, IPHDR_LENGTH,
		},
		.filter	= (1 << IPHDR_VERSION)  | (1 << IPHDR_HDRLENGTH) |
			  (1 << IPHDR_FRAG_OFF),
	},
	.pseudohdr	= {
		IPHDR_SADDR, IPHDR_DADDR, IPHDR_PROTOCOL, IPHDR_LENGTH,
	},
};

/*
 * ICMPv6
 */

#include <netinet/icmp6.h>

#define IND_NEIGHBOR_SOLICIT	141
#define IND_NEIGHBOR_ADVERT	142
#define ICMPV6_MLD2_REPORT	143

static const struct symbol_table icmp6_type_tbl = {
	.base		= BASE_DECIMAL,
	.symbols	= {
		SYMBOL("destination-unreachable",	ICMP6_DST_UNREACH),
		SYMBOL("packet-too-big",		ICMP6_PACKET_TOO_BIG),
		SYMBOL("time-exceeded",			ICMP6_TIME_EXCEEDED),
		SYMBOL("parameter-problem",		ICMP6_PARAM_PROB),
		SYMBOL("echo-request",			ICMP6_ECHO_REQUEST),
		SYMBOL("echo-reply",			ICMP6_ECHO_REPLY),
		SYMBOL("mld-listener-query",		MLD_LISTENER_QUERY),
		SYMBOL("mld-listener-report",		MLD_LISTENER_REPORT),
		SYMBOL("mld-listener-done",		MLD_LISTENER_REDUCTION),
		SYMBOL("mld-listener-reduction",	MLD_LISTENER_REDUCTION),
		SYMBOL("nd-router-solicit",		ND_ROUTER_SOLICIT),
		SYMBOL("nd-router-advert",		ND_ROUTER_ADVERT),
		SYMBOL("nd-neighbor-solicit",		ND_NEIGHBOR_SOLICIT),
		SYMBOL("nd-neighbor-advert",		ND_NEIGHBOR_ADVERT),
		SYMBOL("nd-redirect",			ND_REDIRECT),
		SYMBOL("router-renumbering",		ICMP6_ROUTER_RENUMBERING),
		SYMBOL("ind-neighbor-solicit",		IND_NEIGHBOR_SOLICIT),
		SYMBOL("ind-neighbor-advert",		IND_NEIGHBOR_ADVERT),
		SYMBOL("mld2-listener-report",		ICMPV6_MLD2_REPORT),
		SYMBOL_LIST_END
	},
};

const struct datatype icmp6_type_type = {
	.type		= TYPE_ICMP6_TYPE,
	.name		= "icmpv6_type",
	.desc		= "ICMPv6 type",
	.byteorder	= BYTEORDER_BIG_ENDIAN,
	.size		= BITS_PER_BYTE,
	.basetype	= &integer_type,
	.sym_tbl	= &icmp6_type_tbl,
};

#define ICMP6HDR_FIELD(__token, __member, __dep) \
	ICMP46HDR_FIELD(__token, integer_type, struct icmp6_hdr, __member, __dep)
#define ICMP6HDR_TYPE(__name, __type, __member) \
	HDR_TYPE(__name, __type, struct icmp6_hdr, __member)

const struct proto_desc proto_icmp6 = {
	.name		= "icmpv6",
	.id		= PROTO_DESC_ICMPV6,
	.base		= PROTO_BASE_TRANSPORT_HDR,
	.protocol_key	= ICMP6HDR_TYPE,
	.checksum_key	= ICMP6HDR_CHECKSUM,
	.checksum_type  = NFT_PAYLOAD_CSUM_INET,
	.templates	= {
		[ICMP6HDR_TYPE]		= ICMP6HDR_TYPE("type", &icmp6_type_type, icmp6_type),
		[ICMP6HDR_CODE]		= ICMP6HDR_TYPE("code", &icmpv6_code_type, icmp6_code),
		[ICMP6HDR_CHECKSUM]	= ICMP6HDR_FIELD("checksum", icmp6_cksum, PROTO_ICMP_ANY),
		[ICMP6HDR_PPTR]		= ICMP6HDR_FIELD("parameter-problem", icmp6_pptr, PROTO_ICMP6_PPTR),
		[ICMP6HDR_MTU]		= ICMP6HDR_FIELD("mtu", icmp6_mtu, PROTO_ICMP6_MTU),
		[ICMP6HDR_ID]		= ICMP6HDR_FIELD("id", icmp6_id, PROTO_ICMP6_ECHO),
		[ICMP6HDR_SEQ]		= ICMP6HDR_FIELD("sequence", icmp6_seq, PROTO_ICMP6_ECHO),
		[ICMP6HDR_MAXDELAY]	= ICMP6HDR_FIELD("max-delay", icmp6_maxdelay, PROTO_ICMP6_MGMQ),
		[ICMP6HDR_TADDR]	= ICMP46HDR_FIELD("taddr", ip6addr_type,
							  struct nd_neighbor_solicit, nd_ns_target,
							  PROTO_ICMP6_ADDRESS),
		[ICMP6HDR_DADDR]	= ICMP46HDR_FIELD("daddr", ip6addr_type,
							  struct nd_redirect, nd_rd_dst,
							  PROTO_ICMP6_REDIRECT),
	},
};

/*
 * IPv6
 */

#define IP6HDR_FIELD(__name,  __member) \
	HDR_FIELD(__name, struct ipv6hdr, __member)
#define IP6HDR_ADDR(__name, __member) \
	HDR_TYPE(__name, &ip6addr_type, struct ipv6hdr, __member)
#define IP6HDR_PROTOCOL(__name, __member) \
	HDR_TYPE(__name, &inet_service_type, struct ipv6hdr, __member)

const struct proto_desc proto_ip6 = {
	.name		= "ip6",
	.id		= PROTO_DESC_IP6,
	.base		= PROTO_BASE_NETWORK_HDR,
	.protocols	= {
		PROTO_LINK(IPPROTO_ESP,		&proto_esp),
		PROTO_LINK(IPPROTO_AH,		&proto_ah),
		PROTO_LINK(IPPROTO_COMP,	&proto_comp),
		PROTO_LINK(IPPROTO_UDP,		&proto_udp),
		PROTO_LINK(IPPROTO_UDPLITE,	&proto_udplite),
		PROTO_LINK(IPPROTO_TCP,		&proto_tcp),
		PROTO_LINK(IPPROTO_DCCP,	&proto_dccp),
		PROTO_LINK(IPPROTO_SCTP,	&proto_sctp),
		PROTO_LINK(IPPROTO_ICMP,	&proto_icmp),
		PROTO_LINK(IPPROTO_IGMP,	&proto_igmp),
		PROTO_LINK(IPPROTO_ICMPV6,	&proto_icmp6),
		PROTO_LINK(IPPROTO_GRE,		&proto_gre),
		PROTO_LINK(IPPROTO_GRE,		&proto_gretap),
	},
	.templates	= {
		[0]	= PROTO_META_TEMPLATE("l4proto", &inet_protocol_type, NFT_META_L4PROTO, 8),
		[IP6HDR_VERSION]	= HDR_BITFIELD("version", &integer_type, 0, 4),
		[IP6HDR_DSCP]		= HDR_BITFIELD("dscp", &dscp_type, 4, 6),
		[IP6HDR_ECN]		= HDR_BITFIELD("ecn", &ecn_type, 10, 2),
		[IP6HDR_FLOWLABEL]	= HDR_BITFIELD("flowlabel", &integer_type, 12, 20),
		[IP6HDR_LENGTH]		= IP6HDR_FIELD("length",	payload_len),
		[IP6HDR_NEXTHDR]	= INET_PROTOCOL("nexthdr", struct ipv6hdr, nexthdr),
		[IP6HDR_HOPLIMIT]	= IP6HDR_FIELD("hoplimit",	hop_limit),
		[IP6HDR_SADDR]		= IP6HDR_ADDR("saddr",		saddr),
		[IP6HDR_DADDR]		= IP6HDR_ADDR("daddr",		daddr),
	},
	.format		= {
		.order	= {
			IP6HDR_SADDR, IP6HDR_DADDR, IP6HDR_DSCP, IP6HDR_ECN,
			IP6HDR_HOPLIMIT, IP6HDR_FLOWLABEL, IP6HDR_NEXTHDR,
			IP6HDR_LENGTH,
		},
		.filter	= (1 << IP6HDR_VERSION),
	},
	.pseudohdr	= {
		IP6HDR_SADDR, IP6HDR_DADDR, IP6HDR_NEXTHDR, IP6HDR_LENGTH,
	},
};

/*
 * Dummy protocol for mixed IPv4/IPv6 tables. The protocol is set at the link
 * layer header, the upper layer protocols are IPv4 and IPv6.
 */

const struct proto_desc proto_inet = {
	.name		= "inet",
	.base		= PROTO_BASE_LL_HDR,
	.protocols	= {
		PROTO_LINK(NFPROTO_IPV4,	&proto_ip),
		PROTO_LINK(NFPROTO_IPV6,	&proto_ip6),
	},
	.templates	= {
		[0]	= PROTO_META_TEMPLATE("nfproto", &nfproto_type, NFT_META_NFPROTO, 8),
	},
};

/*
 * Dummy protocol for cases where the network layer protocol isn't known
 * (IPv4 or IPv6), The higher layer protocols are the protocols common to
 * both.
 */

const struct proto_desc proto_inet_service = {
	.name		= "inet-service",
	.base		= PROTO_BASE_TRANSPORT_HDR,
	.protocol_key	= 0,
	.protocols	= {
		PROTO_LINK(IPPROTO_ESP,		&proto_esp),
		PROTO_LINK(IPPROTO_AH,		&proto_ah),
		PROTO_LINK(IPPROTO_COMP,	&proto_comp),
		PROTO_LINK(IPPROTO_UDP,		&proto_udp),
		PROTO_LINK(IPPROTO_UDPLITE,	&proto_udplite),
		PROTO_LINK(IPPROTO_TCP,		&proto_tcp),
		PROTO_LINK(IPPROTO_DCCP,	&proto_dccp),
		PROTO_LINK(IPPROTO_SCTP,	&proto_sctp),
		PROTO_LINK(IPPROTO_ICMP,	&proto_icmp),
		PROTO_LINK(IPPROTO_IGMP,	&proto_igmp),
		PROTO_LINK(IPPROTO_ICMPV6,	&proto_icmp6),
		PROTO_LINK(IPPROTO_GRE,		&proto_gre),
		PROTO_LINK(IPPROTO_GRE,		&proto_gretap),
	},
	.templates	= {
		[0]	= PROTO_META_TEMPLATE("l4proto", &inet_protocol_type, NFT_META_L4PROTO, 8),
	},
};

/*
 * ARP
 */

#include <net/if_arp.h>

static const struct symbol_table arpop_tbl = {
	.base		= BASE_HEXADECIMAL,
	.symbols	= {
		SYMBOL("request",	__constant_htons(ARPOP_REQUEST)),
		SYMBOL("reply",		__constant_htons(ARPOP_REPLY)),
		SYMBOL("rrequest",	__constant_htons(ARPOP_RREQUEST)),
		SYMBOL("rreply",	__constant_htons(ARPOP_RREPLY)),
		SYMBOL("inrequest",	__constant_htons(ARPOP_InREQUEST)),
		SYMBOL("inreply",	__constant_htons(ARPOP_InREPLY)),
		SYMBOL("nak",		__constant_htons(ARPOP_NAK)),
		SYMBOL_LIST_END
	},
};

const struct datatype arpop_type = {
	.type		= TYPE_ARPOP,
	.name		= "arp_op",
	.desc		= "ARP operation",
	.byteorder	= BYTEORDER_BIG_ENDIAN,
	.size		= 2 * BITS_PER_BYTE,
	.basetype	= &integer_type,
	.sym_tbl	= &arpop_tbl,
};

#define ARPHDR_TYPE(__name, __type, __member) \
	HDR_TYPE(__name, __type, struct arp_hdr, __member)
#define ARPHDR_FIELD(__name, __member) \
	HDR_FIELD(__name, struct arp_hdr, __member)

const struct proto_desc proto_arp = {
	.name		= "arp",
	.id		= PROTO_DESC_ARP,
	.base		= PROTO_BASE_NETWORK_HDR,
	.templates	= {
		[ARPHDR_HRD]		= ARPHDR_FIELD("htype",	htype),
		[ARPHDR_PRO]		= ARPHDR_TYPE("ptype", &ethertype_type, ptype),
		[ARPHDR_HLN]		= ARPHDR_FIELD("hlen", hlen),
		[ARPHDR_PLN]		= ARPHDR_FIELD("plen", plen),
		[ARPHDR_OP]		= ARPHDR_TYPE("operation", &arpop_type, oper),
		[ARPHDR_SADDR_ETHER]	= ARPHDR_TYPE("saddr ether", &etheraddr_type, sha),
		[ARPHDR_SADDR_IP]	= ARPHDR_TYPE("saddr ip", &ipaddr_type, spa),
		[ARPHDR_DADDR_ETHER]	= ARPHDR_TYPE("daddr ether", &etheraddr_type, tha),
		[ARPHDR_DADDR_IP]	= ARPHDR_TYPE("daddr ip", &ipaddr_type, tpa),
	},
	.format		= {
		.filter	= (1 << ARPHDR_HRD) | (1 << ARPHDR_PRO) |
			  (1 << ARPHDR_HLN) | (1 << ARPHDR_PLN) |
			  (1 << ARPHDR_SADDR_ETHER) | (1 << ARPHDR_DADDR_ETHER) |
			  (1 << ARPHDR_SADDR_IP) | (1 << ARPHDR_DADDR_IP),
	},
};

/*
 * VLAN
 */

#include <net/ethernet.h>

#define VLANHDR_BITFIELD(__name, __offset, __len) \
	HDR_BITFIELD(__name, &integer_type, __offset, __len)
#define VLANHDR_TYPE(__name, __type, __member) \
	HDR_TYPE(__name, __type, struct vlan_hdr, __member)

const struct proto_desc proto_vlan = {
	.name		= "vlan",
	.id		= PROTO_DESC_VLAN,
	.base		= PROTO_BASE_LL_HDR,
	.protocol_key	= VLANHDR_TYPE,
	.length		= sizeof(struct vlan_hdr) * BITS_PER_BYTE,
	.protocols	= {
		PROTO_LINK(__constant_htons(ETH_P_IP),		&proto_ip),
		PROTO_LINK(__constant_htons(ETH_P_ARP),		&proto_arp),
		PROTO_LINK(__constant_htons(ETH_P_IPV6),	&proto_ip6),
		PROTO_LINK(__constant_htons(ETH_P_8021Q),	&proto_vlan),
		PROTO_LINK(__constant_htons(ETH_P_8021AD),	&proto_vlan),

	},
	.templates	= {
		[VLANHDR_PCP]		= VLANHDR_BITFIELD("pcp", 0, 3),
		[VLANHDR_DEI]		= VLANHDR_BITFIELD("dei", 3, 1),
		[VLANHDR_CFI]		= VLANHDR_BITFIELD("cfi", 3, 1),
		[VLANHDR_VID]		= VLANHDR_BITFIELD("id", 4, 12),
		[VLANHDR_TYPE]		= VLANHDR_TYPE("type", &ethertype_type, vlan_type),
	},
};

/*
 * Ethernet
 */

const struct datatype etheraddr_type = {
	.type		= TYPE_ETHERADDR,
	.name		= "ether_addr",
	.desc		= "Ethernet address",
	.byteorder	= BYTEORDER_BIG_ENDIAN,
	.size		= ETH_ALEN * BITS_PER_BYTE,
	.basetype	= &lladdr_type,
};

static const struct symbol_table ethertype_tbl = {
	.base		= BASE_HEXADECIMAL,
	.symbols	= {
		SYMBOL("ip",		__constant_htons(ETH_P_IP)),
		SYMBOL("arp",		__constant_htons(ETH_P_ARP)),
		SYMBOL("ip6",		__constant_htons(ETH_P_IPV6)),
		SYMBOL("8021q",		__constant_htons(ETH_P_8021Q)),
		SYMBOL("8021ad",	__constant_htons(ETH_P_8021AD)),

		/* for compatibility with older versions */
		SYMBOL("vlan",		__constant_htons(ETH_P_8021Q)),
		SYMBOL_LIST_END
	},
};

static void ethertype_print(const struct expr *expr, struct output_ctx *octx)
{
	return symbolic_constant_print(&ethertype_tbl, expr, false, octx);
}

const struct datatype ethertype_type = {
	.type		= TYPE_ETHERTYPE,
	.name		= "ether_type",
	.desc		= "Ethernet protocol",
	.byteorder	= BYTEORDER_BIG_ENDIAN,
	.size		= 2 * BITS_PER_BYTE,
	.basetype	= &integer_type,
	.basefmt	= "0x%.4Zx",
	.print		= ethertype_print,
	.sym_tbl	= &ethertype_tbl,
};

#define ETHHDR_TEMPLATE(__name, __dtype, __member) \
	HDR_TEMPLATE(__name, __dtype, struct ether_header, __member)
#define ETHHDR_TYPE(__name, __member) \
	ETHHDR_TEMPLATE(__name, &ethertype_type, __member)
#define ETHHDR_ADDR(__name, __member) \
	PROTO_HDR_TEMPLATE(__name, &etheraddr_type,		\
			   BYTEORDER_BIG_ENDIAN,		\
			   offsetof(struct ether_header, __member) * 8,	\
			   field_sizeof(struct ether_header, __member) * 8)

const struct proto_desc proto_eth = {
	.name		= "ether",
	.id		= PROTO_DESC_ETHER,
	.base		= PROTO_BASE_LL_HDR,
	.protocol_key	= ETHHDR_TYPE,
	.length		= sizeof(struct ether_header) * BITS_PER_BYTE,
	.protocols	= {
		PROTO_LINK(__constant_htons(ETH_P_IP),		&proto_ip),
		PROTO_LINK(__constant_htons(ETH_P_ARP),		&proto_arp),
		PROTO_LINK(__constant_htons(ETH_P_IPV6),	&proto_ip6),
		PROTO_LINK(__constant_htons(ETH_P_8021Q),	&proto_vlan),
		PROTO_LINK(__constant_htons(ETH_P_8021AD),	&proto_vlan),
	},
	.templates	= {
		[ETHHDR_DADDR]		= ETHHDR_ADDR("daddr", ether_dhost),
		[ETHHDR_SADDR]		= ETHHDR_ADDR("saddr", ether_shost),
		[ETHHDR_TYPE]		= ETHHDR_TYPE("type", ether_type),
	},
	.format		= {
		.order	= {
			ETHHDR_SADDR, ETHHDR_DADDR, ETHHDR_TYPE,
		},
	},

};

/*
 * VXLAN
 */

const struct proto_desc proto_vxlan = {
	.name		= "vxlan",
	.id		= PROTO_DESC_VXLAN,
	.base		= PROTO_BASE_INNER_HDR,
	.templates	= {
		[VXLANHDR_FLAGS] = HDR_BITFIELD("flags", &bitmask_type, 0, 8),
		[VXLANHDR_VNI]	 = HDR_BITFIELD("vni", &integer_type, (4 * BITS_PER_BYTE), 24),
	},
	.protocols	= {
		PROTO_LINK(__constant_htons(ETH_P_IP),		&proto_ip),
		PROTO_LINK(__constant_htons(ETH_P_ARP),		&proto_arp),
		PROTO_LINK(__constant_htons(ETH_P_IPV6),	&proto_ip6),
		PROTO_LINK(__constant_htons(ETH_P_8021Q),	&proto_vlan),
	},
	.inner		= {
		.hdrsize	= sizeof(struct vxlanhdr),
		.flags		= NFT_INNER_HDRSIZE | NFT_INNER_LL | NFT_INNER_NH | NFT_INNER_TH,
		.type		= NFT_INNER_VXLAN,
	},
};

/*
 * GENEVE
 */

const struct proto_desc proto_geneve = {
	.name		= "geneve",
	.id		= PROTO_DESC_GENEVE,
	.base		= PROTO_BASE_INNER_HDR,
	.templates	= {
		[GNVHDR_TYPE]	= HDR_TYPE("type", &ethertype_type, struct gnvhdr, type),
		[GNVHDR_VNI]	= HDR_BITFIELD("vni", &integer_type, (4 * BITS_PER_BYTE), 24),
	},
	.protocols	= {
		PROTO_LINK(__constant_htons(ETH_P_IP),		&proto_ip),
		PROTO_LINK(__constant_htons(ETH_P_ARP),		&proto_arp),
		PROTO_LINK(__constant_htons(ETH_P_IPV6),	&proto_ip6),
		PROTO_LINK(__constant_htons(ETH_P_8021Q),	&proto_vlan),
	},
	.inner		= {
		.hdrsize	= sizeof(struct gnvhdr),
		.flags		= NFT_INNER_HDRSIZE | NFT_INNER_LL | NFT_INNER_NH | NFT_INNER_TH,
		.type		= NFT_INNER_GENEVE,
	},
};


/*
 * Dummy protocol for netdev tables.
 */
const struct proto_desc proto_netdev = {
	.name		= "netdev",
	.base		= PROTO_BASE_LL_HDR,
	.protocols	= {
		PROTO_LINK(__constant_htons(ETH_P_IP),		&proto_ip),
		PROTO_LINK(__constant_htons(ETH_P_ARP),		&proto_arp),
		PROTO_LINK(__constant_htons(ETH_P_IPV6),	&proto_ip6),
		PROTO_LINK(__constant_htons(ETH_P_8021Q),	&proto_vlan),
		PROTO_LINK(__constant_htons(ETH_P_8021AD),	&proto_vlan),
	},
	.templates	= {
		[0]	= PROTO_META_TEMPLATE("protocol", &ethertype_type, NFT_META_PROTOCOL, 16),
	},
};

static const struct proto_desc *const proto_definitions[PROTO_DESC_MAX + 1] = {
	[PROTO_DESC_AH]		= &proto_ah,
	[PROTO_DESC_ESP]	= &proto_esp,
	[PROTO_DESC_COMP]	= &proto_comp,
	[PROTO_DESC_ICMP]	= &proto_icmp,
	[PROTO_DESC_IGMP]	= &proto_igmp,
	[PROTO_DESC_UDP]	= &proto_udp,
	[PROTO_DESC_UDPLITE]	= &proto_udplite,
	[PROTO_DESC_TCP]	= &proto_tcp,
	[PROTO_DESC_DCCP]	= &proto_dccp,
	[PROTO_DESC_SCTP]	= &proto_sctp,
	[PROTO_DESC_TH]		= &proto_th,
	[PROTO_DESC_IP]		= &proto_ip,
	[PROTO_DESC_IP6]	= &proto_ip6,
	[PROTO_DESC_ICMPV6]	= &proto_icmp6,
	[PROTO_DESC_ARP]	= &proto_arp,
	[PROTO_DESC_VLAN]	= &proto_vlan,
	[PROTO_DESC_ETHER]	= &proto_eth,
	[PROTO_DESC_VXLAN]	= &proto_vxlan,
	[PROTO_DESC_GENEVE]	= &proto_geneve,
	[PROTO_DESC_GRE]	= &proto_gre,
	[PROTO_DESC_GRETAP]	= &proto_gretap,
};

const struct proto_desc *proto_find_desc(enum proto_desc_id desc_id)
{
	if (desc_id >= PROTO_DESC_UNKNOWN &&
	    desc_id <= PROTO_DESC_MAX)
		return proto_definitions[desc_id];

	return NULL;
}