This file is indexed.

/usr/src/xtables-addons-1.40/ipset-6/libipset/print.c is in xtables-addons-dkms 1.40-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  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
/* Copyright 2007-2010 Jozsef Kadlecsik (kadlec@blackhole.kfki.hu)
 *
 * 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 <assert.h>				/* assert */
#include <errno.h>				/* errno */
#include <stdio.h>				/* snprintf */
#include <netdb.h>				/* getservbyport */
#include <sys/types.h>				/* inet_ntop */
#include <sys/socket.h>				/* inet_ntop */
#include <arpa/inet.h>				/* inet_ntop */
#include <net/ethernet.h>			/* ETH_ALEN */
#include <net/if.h>				/* IFNAMSIZ */

#include <libipset/debug.h>			/* D() */
#include <libipset/data.h>			/* ipset_data_* */
#include <libipset/icmp.h>			/* icmp_to_name */
#include <libipset/icmpv6.h>			/* icmpv6_to_name */
#include <libipset/parse.h>			/* IPSET_*_SEPARATOR */
#include <libipset/types.h>			/* ipset set types */
#include <libipset/session.h>			/* IPSET_FLAG_ */
#include <libipset/utils.h>			/* UNUSED */
#include <libipset/ui.h>			/* IPSET_ENV_* */
#include <libipset/print.h>			/* prototypes */

/* Print data (to output buffer). All function must follow snprintf. */

#define SNPRINTF_FAILURE(size, len, offset)			\
do {								\
	if (size < 0 || (unsigned int) size >= len)		\
		return size;					\
	offset += size;						\
	len -= size;						\
} while (0)

/**
 * ipset_print_ether - print ethernet address to string
 * @buf: printing buffer
 * @len: length of available buffer space
 * @data: data blob
 * @opt: the option kind
 * @env: environment flags
 *
 * Print Ethernet address to output buffer.
 *
 * Return lenght of printed string or error size.
 */
int
ipset_print_ether(char *buf, unsigned int len,
		  const struct ipset_data *data, enum ipset_opt opt,
		  uint8_t env UNUSED)
{
	const unsigned char *ether;
	int i, size, offset = 0;

	assert(buf);
	assert(len > 0);
	assert(data);
	assert(opt == IPSET_OPT_ETHER);

	if (len < ETH_ALEN*3)
		return -1;

	ether = ipset_data_get(data, opt);
	assert(ether);

	size = snprintf(buf, len, "%02X", ether[0]);
	SNPRINTF_FAILURE(size, len, offset);
	for (i = 1; i < ETH_ALEN; i++) {
		size = snprintf(buf + offset, len, ":%02X", ether[i]);
		SNPRINTF_FAILURE(size, len, offset);
	}

	return offset;
}

/**
 * ipset_print_family - print INET family
 * @buf: printing buffer
 * @len: length of available buffer space
 * @data: data blob
 * @opt: the option kind
 * @env: environment flags
 *
 * Print INET family string to output buffer.
 *
 * Return lenght of printed string or error size.
 */
int
ipset_print_family(char *buf, unsigned int len,
		   const struct ipset_data *data,
		   enum ipset_opt opt ASSERT_UNUSED,
		   uint8_t env UNUSED)
{
	uint8_t family;

	assert(buf);
	assert(len > 0);
	assert(data);
	assert(opt == IPSET_OPT_FAMILY);

	if (len < strlen("inet6") + 1)
		return -1;

	family = ipset_data_family(data);

	return snprintf(buf, len, "%s",
			family == AF_INET ? "inet" :
			family == AF_INET6 ? "inet6" : "any");
}

/**
 * ipset_print_type - print ipset type string
 * @buf: printing buffer
 * @len: length of available buffer space
 * @data: data blob
 * @opt: the option kind
 * @env: environment flags
 *
 * Print ipset module string identifier to output buffer.
 *
 * Return lenght of printed string or error size.
 */
int
ipset_print_type(char *buf, unsigned int len,
		 const struct ipset_data *data, enum ipset_opt opt,
		 uint8_t env UNUSED)
{
	const struct ipset_type *type;

	assert(buf);
	assert(len > 0);
	assert(data);
	assert(opt == IPSET_OPT_TYPE);

	type = ipset_data_get(data, opt);
	assert(type);
	if (len < strlen(type->name) + 1)
		return -1;

	return snprintf(buf, len, "%s", type->name);
}

static inline int
__getnameinfo4(char *buf, unsigned int len,
	       int flags, const union nf_inet_addr *addr)
{
	struct sockaddr_in saddr;
	int err;

	memset(&saddr, 0, sizeof(saddr));
	in4cpy(&saddr.sin_addr, &addr->in);
	saddr.sin_family = NFPROTO_IPV4;

	err = getnameinfo((const struct sockaddr *)&saddr,
			  sizeof(saddr),
			  buf, len, NULL, 0, flags);

	if (!(flags & NI_NUMERICHOST) &&
	    (err == EAI_AGAIN || (err == 0 && strchr(buf, '-') != NULL)))
		err = getnameinfo((const struct sockaddr *)&saddr,
				  sizeof(saddr),
				  buf, len, NULL, 0,
				  flags | NI_NUMERICHOST);
	D("getnameinfo err: %i, errno %i", err, errno);
	return (err == 0 ? (int)strlen(buf) :
	       (err == EAI_OVERFLOW || err == EAI_SYSTEM) ? (int)len : -1);
}

static inline int
__getnameinfo6(char *buf, unsigned int len,
	       int flags, const union nf_inet_addr *addr)
{
	struct sockaddr_in6 saddr;
	int err;

	memset(&saddr, 0, sizeof(saddr));
	in6cpy(&saddr.sin6_addr, &addr->in6);
	saddr.sin6_family = NFPROTO_IPV6;

	err = getnameinfo((const struct sockaddr *)&saddr,
			  sizeof(saddr),
			  buf, len, NULL, 0, flags);

	if (!(flags & NI_NUMERICHOST) &&
	    (err == EAI_AGAIN || (err == 0 && strchr(buf, '-') != NULL)))
		err = getnameinfo((const struct sockaddr *)&saddr,
				  sizeof(saddr),
				  buf, len, NULL, 0,
				  flags | NI_NUMERICHOST);
	D("getnameinfo err: %i, errno %i", err, errno);
	return (err == 0 ? (int)strlen(buf) :
	       (err == EAI_OVERFLOW || err == EAI_SYSTEM) ? (int)len : -1);
}

#define SNPRINTF_IP(mask, f)						\
static int								\
snprintf_ipv##f(char *buf, unsigned int len, int flags,			\
	       const union nf_inet_addr *ip, uint8_t cidr)		\
{									\
	int size, offset = 0;						\
									\
	size = __getnameinfo##f(buf, len, flags, ip);			\
	SNPRINTF_FAILURE(size, len, offset);				\
									\
	D("cidr %u mask %u", cidr, mask);				\
	if (cidr == mask)						\
		return offset;						\
	D("print cidr");						\
	size = snprintf(buf + offset, len,				\
			"%s%u", IPSET_CIDR_SEPARATOR, cidr);		\
	SNPRINTF_FAILURE(size, len, offset);				\
	return offset;							\
}

SNPRINTF_IP(32, 4)

SNPRINTF_IP(128, 6)

/**
 * ipset_print_ip - print IPv4|IPv6 address to string
 * @buf: printing buffer
 * @len: length of available buffer space
 * @data: data blob
 * @opt: the option kind
 * @env: environment flags
 *
 * Print IPv4|IPv6 address, address/cidr or address range to output buffer.
 *
 * Return lenght of printed string or error size.
 */
int
ipset_print_ip(char *buf, unsigned int len,
	       const struct ipset_data *data, enum ipset_opt opt,
	       uint8_t env)
{
	const union nf_inet_addr *ip;
	uint8_t family, cidr;
	int flags, size, offset = 0;
	enum ipset_opt cidropt;

	assert(buf);
	assert(len > 0);
	assert(data);
	assert(opt == IPSET_OPT_IP || opt == IPSET_OPT_IP2);

	D("len: %u", len);
	family = ipset_data_family(data);
	cidropt = opt == IPSET_OPT_IP ? IPSET_OPT_CIDR : IPSET_OPT_CIDR2;
	if (ipset_data_test(data, cidropt)) {
		cidr = *(const uint8_t *) ipset_data_get(data, cidropt);
		D("CIDR: %u", cidr);
	} else
		cidr = family == NFPROTO_IPV6 ? 128 : 32;
	flags = (env & IPSET_ENV_RESOLVE) ? 0 : NI_NUMERICHOST;

	ip = ipset_data_get(data, opt);
	assert(ip);
	if (family == NFPROTO_IPV4)
		size = snprintf_ipv4(buf, len, flags, ip, cidr);
	else if (family == NFPROTO_IPV6)
		size = snprintf_ipv6(buf, len, flags, ip, cidr);
	else
		return -1;
	D("size %i, len %u", size, len);
	SNPRINTF_FAILURE(size, len, offset);

	D("len: %u, offset %u", len, offset);
	if (!ipset_data_test(data, IPSET_OPT_IP_TO))
		return offset;

	size = snprintf(buf + offset, len, "%s", IPSET_RANGE_SEPARATOR);
	SNPRINTF_FAILURE(size, len, offset);

	ip = ipset_data_get(data, IPSET_OPT_IP_TO);
	if (family == NFPROTO_IPV4)
		size = snprintf_ipv4(buf + offset, len, flags, ip, cidr);
	else if (family == NFPROTO_IPV6)
		size = snprintf_ipv6(buf + offset, len, flags, ip, cidr);
	else
		return -1;

	SNPRINTF_FAILURE(size, len, offset);
	return offset;
}

/**
 * ipset_print_ipaddr - print IPv4|IPv6 address to string
 * @buf: printing buffer
 * @len: length of available buffer space
 * @data: data blob
 * @opt: the option kind
 * @env: environment flags
 *
 * Print IPv4|IPv6 address or address/cidr to output buffer.
 *
 * Return lenght of printed string or error size.
 */
int
ipset_print_ipaddr(char *buf, unsigned int len,
		   const struct ipset_data *data, enum ipset_opt opt,
		   uint8_t env)
{
	const union nf_inet_addr *ip;
	uint8_t family, cidr;
	enum ipset_opt cidropt;
	int flags;

	assert(buf);
	assert(len > 0);
	assert(data);
	assert(opt == IPSET_OPT_IP ||
	       opt == IPSET_OPT_IP_TO ||
	       opt == IPSET_OPT_IP2);

	family = ipset_data_family(data);
	cidropt = opt == IPSET_OPT_IP ? IPSET_OPT_CIDR : IPSET_OPT_CIDR2;
	if (ipset_data_test(data, cidropt))
		cidr = *(const uint8_t *) ipset_data_get(data, cidropt);
	else
		cidr = family == NFPROTO_IPV6 ? 128 : 32;
	flags = (env & IPSET_ENV_RESOLVE) ? 0 : NI_NUMERICHOST;

	ip = ipset_data_get(data, opt);
	assert(ip);
	if (family == NFPROTO_IPV4)
		return snprintf_ipv4(buf, len, flags, ip, cidr);
	else if (family == NFPROTO_IPV6)
		return snprintf_ipv6(buf, len, flags, ip, cidr);

	return -1;
}

/**
 * ipset_print_number - print number to string
 * @buf: printing buffer
 * @len: length of available buffer space
 * @data: data blob
 * @opt: the option kind
 * @env: environment flags
 *
 * Print number to output buffer.
 *
 * Return lenght of printed string or error size.
 */
int
ipset_print_number(char *buf, unsigned int len,
		   const struct ipset_data *data, enum ipset_opt opt,
		   uint8_t env UNUSED)
{
	size_t maxsize;
	const void *number;

	assert(buf);
	assert(len > 0);
	assert(data);

	number = ipset_data_get(data, opt);
	maxsize = ipset_data_sizeof(opt, AF_INET);
	D("opt: %u, maxsize %zu", opt, maxsize);
	if (maxsize == sizeof(uint8_t))
		return snprintf(buf, len, "%u", *(const uint8_t *) number);
	else if (maxsize == sizeof(uint16_t))
		return snprintf(buf, len, "%u", *(const uint16_t *) number);
	else if (maxsize == sizeof(uint32_t))
		return snprintf(buf, len, "%lu",
				(long unsigned) *(const uint32_t *) number);
	else
		assert(0);
	return 0;
}

/**
 * ipset_print_name - print setname element string
 * @buf: printing buffer
 * @len: length of available buffer space
 * @data: data blob
 * @opt: the option kind
 * @env: environment flags
 *
 * Print setname element string to output buffer.
 *
 * Return lenght of printed string or error size.
 */
int
ipset_print_name(char *buf, unsigned int len,
		 const struct ipset_data *data, enum ipset_opt opt,
		 uint8_t env UNUSED)
{
	const char *name;
	int size, offset = 0;

	assert(buf);
	assert(len > 0);
	assert(data);
	assert(opt == IPSET_OPT_NAME);

	if (len < 2*IPSET_MAXNAMELEN + 2 + strlen("before"))
		return -1;

	name = ipset_data_get(data, opt);
	assert(name);
	size = snprintf(buf, len, "%s", name);
	SNPRINTF_FAILURE(size, len, offset);

	if (ipset_data_test(data, IPSET_OPT_NAMEREF)) {
		bool before = false;
		if (ipset_data_flags_test(data, IPSET_FLAG(IPSET_OPT_FLAGS))) {
			const uint32_t *flags =
				ipset_data_get(data, IPSET_OPT_FLAGS);
			before = (*flags) & IPSET_FLAG_BEFORE;
		}
		size = snprintf(buf + offset, len,
				" %s %s", before ? "before" : "after",
				(const char *) ipset_data_get(data,
							IPSET_OPT_NAMEREF));
		SNPRINTF_FAILURE(size, len, offset);
	}

	return offset;
}

/**
 * ipset_print_port - print port or port range
 * @buf: printing buffer
 * @len: length of available buffer space
 * @data: data blob
 * @opt: the option kind
 * @env: environment flags
 *
 * Print port or port range to output buffer.
 *
 * Return lenght of printed string or error size.
 */
int
ipset_print_port(char *buf, unsigned int len,
		 const struct ipset_data *data,
		 enum ipset_opt opt ASSERT_UNUSED,
		 uint8_t env UNUSED)
{
	const uint16_t *port;
	int size, offset = 0;

	assert(buf);
	assert(len > 0);
	assert(data);
	assert(opt == IPSET_OPT_PORT);

	if (len < 2*strlen("65535") + 2)
		return -1;

	port = ipset_data_get(data, IPSET_OPT_PORT);
	assert(port);
	size = snprintf(buf, len, "%u", *port);
	SNPRINTF_FAILURE(size, len, offset);

	if (ipset_data_test(data, IPSET_OPT_PORT_TO)) {
		port = ipset_data_get(data, IPSET_OPT_PORT_TO);
		size = snprintf(buf + offset, len,
				"%s%u",
				IPSET_RANGE_SEPARATOR, *port);
		SNPRINTF_FAILURE(size, len, offset);
	}

	return offset;
}

/**
 * ipset_print_iface - print interface element string
 * @buf: printing buffer
 * @len: length of available buffer space
 * @data: data blob
 * @opt: the option kind
 * @env: environment flags
 *
 * Print interface element string to output buffer.
 *
 * Return lenght of printed string or error size.
 */
int
ipset_print_iface(char *buf, unsigned int len,
		  const struct ipset_data *data, enum ipset_opt opt,
		  uint8_t env UNUSED)
{
	const char *name;
	int size, offset = 0;

	assert(buf);
	assert(len > 0);
	assert(data);
	assert(opt == IPSET_OPT_IFACE);

	if (len < IFNAMSIZ + strlen("physdev:"))
		return -1;

	if (ipset_data_test(data, IPSET_OPT_PHYSDEV)) {
		size = snprintf(buf, len, "physdev:");
		SNPRINTF_FAILURE(size, len, offset);
	}
	name = ipset_data_get(data, opt);
	assert(name);
	size = snprintf(buf, len, "%s", name);
	SNPRINTF_FAILURE(size, len, offset);
	return offset;
}

/**
 * ipset_print_proto - print protocol name
 * @buf: printing buffer
 * @len: length of available buffer space
 * @data: data blob
 * @opt: the option kind
 * @env: environment flags
 *
 * Print protocol name to output buffer.
 *
 * Return lenght of printed string or error size.
 */
int
ipset_print_proto(char *buf, unsigned int len,
		  const struct ipset_data *data,
		  enum ipset_opt opt ASSERT_UNUSED,
		  uint8_t env UNUSED)
{
	const struct protoent *protoent;
	uint8_t proto;

	assert(buf);
	assert(len > 0);
	assert(data);
	assert(opt == IPSET_OPT_PROTO);

	proto = *(const uint8_t *) ipset_data_get(data, IPSET_OPT_PROTO);
	assert(proto);

	protoent = getprotobynumber(proto);
	if (protoent)
		return snprintf(buf, len, "%s", protoent->p_name);

	/* Should not happen */
	return snprintf(buf, len, "%u", proto);
}

/**
 * ipset_print_icmp - print ICMP code name or type/code
 * @buf: printing buffer
 * @len: length of available buffer space
 * @data: data blob
 * @opt: the option kind
 * @env: environment flags
 *
 * Print ICMP code name or type/code name to output buffer.
 *
 * Return lenght of printed string or error size.
 */
int
ipset_print_icmp(char *buf, unsigned int len,
		 const struct ipset_data *data,
		 enum ipset_opt opt ASSERT_UNUSED,
		 uint8_t env UNUSED)
{
	const char *name;
	uint16_t typecode;

	assert(buf);
	assert(len > 0);
	assert(data);
	assert(opt == IPSET_OPT_PORT);

	typecode = *(const uint16_t *) ipset_data_get(data, IPSET_OPT_PORT);
	name = icmp_to_name(typecode >> 8, typecode & 0xFF);
	if (name != NULL)
		return snprintf(buf, len, "%s", name);
	else
		return snprintf(buf, len, "%u/%u",
				typecode >> 8, typecode & 0xFF);
}

/**
 * ipset_print_icmpv6 - print ICMPv6 code name or type/code
 * @buf: printing buffer
 * @len: length of available buffer space
 * @data: data blob
 * @opt: the option kind
 * @env: environment flags
 *
 * Print ICMPv6 code name or type/code name to output buffer.
 *
 * Return lenght of printed string or error size.
 */
int
ipset_print_icmpv6(char *buf, unsigned int len,
		   const struct ipset_data *data,
		   enum ipset_opt opt ASSERT_UNUSED,
		   uint8_t env UNUSED)
{
	const char *name;
	uint16_t typecode;

	assert(buf);
	assert(len > 0);
	assert(data);
	assert(opt == IPSET_OPT_PORT);

	typecode = *(const uint16_t *) ipset_data_get(data, IPSET_OPT_PORT);
	name = icmpv6_to_name(typecode >> 8, typecode & 0xFF);
	if (name != NULL)
		return snprintf(buf, len, "%s", name);
	else
		return snprintf(buf, len, "%u/%u",
				typecode >> 8, typecode & 0xFF);
}

/**
 * ipset_print_proto_port - print proto:port
 * @buf: printing buffer
 * @len: length of available buffer space
 * @data: data blob
 * @opt: the option kind
 * @env: environment flags
 *
 * Print protocol and port to output buffer.
 *
 * Return lenght of printed string or error size.
 */
int
ipset_print_proto_port(char *buf, unsigned int len,
		       const struct ipset_data *data,
		       enum ipset_opt opt ASSERT_UNUSED,
		       uint8_t env UNUSED)
{
	int size, offset = 0;

	assert(buf);
	assert(len > 0);
	assert(data);
	assert(opt == IPSET_OPT_PORT);

	if (ipset_data_flags_test(data, IPSET_FLAG(IPSET_OPT_PROTO))) {
		uint8_t proto = *(const uint8_t *) ipset_data_get(data,
							IPSET_OPT_PROTO);
		size = ipset_print_proto(buf, len, data, IPSET_OPT_PROTO, env);
		SNPRINTF_FAILURE(size, len, offset);
		if (len < 2)
			return -ENOSPC;
		size = snprintf(buf + offset, len, IPSET_PROTO_SEPARATOR);
		SNPRINTF_FAILURE(size, len, offset);

		switch (proto) {
		case IPPROTO_TCP:
		case IPPROTO_SCTP:
		case IPPROTO_UDP:
		case IPPROTO_UDPLITE:
			break;
		case IPPROTO_ICMP:
			return ipset_print_icmp(buf + offset, len, data,
						IPSET_OPT_PORT, env);
		case IPPROTO_ICMPV6:
			return ipset_print_icmpv6(buf + offset, len, data,
						  IPSET_OPT_PORT, env);
		default:
			break;
		}
	}
	size = ipset_print_port(buf + offset, len, data, IPSET_OPT_PORT, env);
	SNPRINTF_FAILURE(size, len, offset);

	return offset;
}

#define print_second(data)	\
ipset_data_flags_test(data,	\
	IPSET_FLAG(IPSET_OPT_PORT)|IPSET_FLAG(IPSET_OPT_ETHER))

#define print_third(data)	\
ipset_data_flags_test(data, IPSET_FLAG(IPSET_OPT_IP2))

/**
 * ipset_print_elem - print ADT elem according to settype
 * @buf: printing buffer
 * @len: length of available buffer space
 * @data: data blob
 * @opt: the option kind
 * @env: environment flags
 *
 * Print (multipart) element according to settype
 *
 * Return lenght of printed string or error size.
 */
int
ipset_print_elem(char *buf, unsigned int len,
		 const struct ipset_data *data, enum ipset_opt opt UNUSED,
		 uint8_t env)
{
	const struct ipset_type *type;
	int size, offset = 0;

	assert(buf);
	assert(len > 0);
	assert(data);

	type = ipset_data_get(data, IPSET_OPT_TYPE);
	if (!type)
		return -1;

	size = type->elem[IPSET_DIM_ONE - 1].print(buf, len, data,
			type->elem[IPSET_DIM_ONE - 1].opt, env);
	SNPRINTF_FAILURE(size, len, offset);
	IF_D(ipset_data_test(data, type->elem[IPSET_DIM_TWO - 1].opt),
	     "print second elem");
	if (type->dimension == IPSET_DIM_ONE ||
	    (type->last_elem_optional &&
	     !ipset_data_test(data, type->elem[IPSET_DIM_TWO - 1].opt)))
		return offset;

	size = snprintf(buf + offset, len, IPSET_ELEM_SEPARATOR);
	SNPRINTF_FAILURE(size, len, offset);
	size = type->elem[IPSET_DIM_TWO - 1].print(buf + offset, len, data,
			type->elem[IPSET_DIM_TWO - 1].opt, env);
	SNPRINTF_FAILURE(size, len, offset);
	if (type->dimension == IPSET_DIM_TWO ||
	    (type->last_elem_optional &&
	     !ipset_data_test(data, type->elem[IPSET_DIM_THREE - 1].opt)))
		return offset;

	size = snprintf(buf + offset, len, IPSET_ELEM_SEPARATOR);
	SNPRINTF_FAILURE(size, len, offset);
	size = type->elem[IPSET_DIM_THREE - 1].print(buf + offset, len, data,
			type->elem[IPSET_DIM_THREE - 1].opt, env);
	SNPRINTF_FAILURE(size, len, offset);

	return offset;
}

/**
 * ipset_print_flag - print a flag
 * @buf: printing buffer
 * @len: length of available buffer space
 * @data: data blob
 * @opt: the option kind
 * @env: environment flags
 *
 * Print a flag, i.e. option without value
 *
 * Return lenght of printed string or error size.
 */
int
ipset_print_flag(char *buf UNUSED, unsigned int len UNUSED,
		 const struct ipset_data *data UNUSED,
		 enum ipset_opt opt UNUSED, uint8_t env UNUSED)
{
	return 0;
}

/**
 * ipset_print_data - print data, generic fuction
 * @buf: printing buffer
 * @len: length of available buffer space
 * @data: data blob
 * @opt: the option kind
 * @env: environment flags
 *
 * Generic wrapper of the printing functions.
 *
 * Return lenght of printed string or error size.
 */
int
ipset_print_data(char *buf, unsigned int len,
		 const struct ipset_data *data, enum ipset_opt opt,
		 uint8_t env)
{
	int size = 0, offset = 0;

	assert(buf);
	assert(len > 0);
	assert(data);

	switch (opt) {
	case IPSET_OPT_FAMILY:
		size = ipset_print_family(buf, len, data, opt, env);
		break;
	case IPSET_OPT_TYPE:
		size = ipset_print_type(buf, len, data, opt, env);
		break;
	case IPSET_SETNAME:
		size = snprintf(buf, len, "%s", ipset_data_setname(data));
		break;
	case IPSET_OPT_ELEM:
		size = ipset_print_elem(buf, len, data, opt, env);
		break;
	case IPSET_OPT_IP:
		size = ipset_print_ip(buf, len, data, opt, env);
		break;
	case IPSET_OPT_PORT:
		size = ipset_print_port(buf, len, data, opt, env);
		break;
	case IPSET_OPT_IFACE:
		size = ipset_print_iface(buf, len, data, opt, env);
		break;
	case IPSET_OPT_GC:
	case IPSET_OPT_HASHSIZE:
	case IPSET_OPT_MAXELEM:
	case IPSET_OPT_NETMASK:
	case IPSET_OPT_PROBES:
	case IPSET_OPT_RESIZE:
	case IPSET_OPT_TIMEOUT:
	case IPSET_OPT_REFERENCES:
	case IPSET_OPT_ELEMENTS:
	case IPSET_OPT_SIZE:
		size = ipset_print_number(buf, len, data, opt, env);
		break;
	default:
		return -1;
	}
	SNPRINTF_FAILURE(size, len, offset);

	return offset;
}