summaryrefslogtreecommitdiff
path: root/source4/heimdal/lib/krb5/addr_families.c
blob: ebdbcfed46c9a5ec76bab9732dc629a7b86036d3 (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
/*
 * Copyright (c) 1997-2005 Kungliga Tekniska Högskolan
 * (Royal Institute of Technology, Stockholm, Sweden). 
 * All rights reserved. 
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met: 
 *
 * 1. Redistributions of source code must retain the above copyright 
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright 
 *    notice, this list of conditions and the following disclaimer in the 
 *    documentation and/or other materials provided with the distribution. 
 *
 * 3. Neither the name of the Institute nor the names of its contributors 
 *    may be used to endorse or promote products derived from this software 
 *    without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
 * SUCH DAMAGE. 
 */

#include "krb5_locl.h"

RCSID("$Id: addr_families.c,v 1.51 2006/04/02 02:17:31 lha Exp $");

struct addr_operations {
    int af;
    krb5_address_type atype;
    size_t max_sockaddr_size;
    krb5_error_code (*sockaddr2addr)(const struct sockaddr *, krb5_address *);
    krb5_error_code (*sockaddr2port)(const struct sockaddr *, int16_t *);
    void (*addr2sockaddr)(const krb5_address *, struct sockaddr *,
			  krb5_socklen_t *sa_size, int port);
    void (*h_addr2sockaddr)(const char *, struct sockaddr *, krb5_socklen_t *, int);
    krb5_error_code (*h_addr2addr)(const char *, krb5_address *);
    krb5_boolean (*uninteresting)(const struct sockaddr *);
    void (*anyaddr)(struct sockaddr *, krb5_socklen_t *, int);
    int (*print_addr)(const krb5_address *, char *, size_t);
    int (*parse_addr)(krb5_context, const char*, krb5_address *);
    int (*order_addr)(krb5_context, const krb5_address*, const krb5_address*);
    int (*free_addr)(krb5_context, krb5_address*);
    int (*copy_addr)(krb5_context, const krb5_address*, krb5_address*);
    int (*mask_boundary)(krb5_context, const krb5_address*, unsigned long, 
				     krb5_address*, krb5_address*);
};

/*
 * AF_INET - aka IPv4 implementation
 */

static krb5_error_code
ipv4_sockaddr2addr (const struct sockaddr *sa, krb5_address *a)
{
    const struct sockaddr_in *sin4 = (const struct sockaddr_in *)sa;
    unsigned char buf[4];

    a->addr_type = KRB5_ADDRESS_INET;
    memcpy (buf, &sin4->sin_addr, 4);
    return krb5_data_copy(&a->address, buf, 4);
}

static krb5_error_code
ipv4_sockaddr2port (const struct sockaddr *sa, int16_t *port)
{
    const struct sockaddr_in *sin4 = (const struct sockaddr_in *)sa;

    *port = sin4->sin_port;
    return 0;
}

static void
ipv4_addr2sockaddr (const krb5_address *a,
		    struct sockaddr *sa,
		    krb5_socklen_t *sa_size,
		    int port)
{
    struct sockaddr_in tmp;

    memset (&tmp, 0, sizeof(tmp));
    tmp.sin_family = AF_INET;
    memcpy (&tmp.sin_addr, a->address.data, 4);
    tmp.sin_port = port;
    memcpy(sa, &tmp, min(sizeof(tmp), *sa_size));
    *sa_size = sizeof(tmp);
}

static void
ipv4_h_addr2sockaddr(const char *addr,
		     struct sockaddr *sa,
		     krb5_socklen_t *sa_size,
		     int port)
{
    struct sockaddr_in tmp;

    memset (&tmp, 0, sizeof(tmp));
    tmp.sin_family = AF_INET;
    tmp.sin_port   = port;
    tmp.sin_addr   = *((const struct in_addr *)addr);
    memcpy(sa, &tmp, min(sizeof(tmp), *sa_size));
    *sa_size = sizeof(tmp);
}

static krb5_error_code
ipv4_h_addr2addr (const char *addr,
		  krb5_address *a)
{
    unsigned char buf[4];

    a->addr_type = KRB5_ADDRESS_INET;
    memcpy(buf, addr, 4);
    return krb5_data_copy(&a->address, buf, 4);
}

/*
 * Are there any addresses that should be considered `uninteresting'?
 */

static krb5_boolean
ipv4_uninteresting (const struct sockaddr *sa)
{
    const struct sockaddr_in *sin4 = (const struct sockaddr_in *)sa;

    if (sin4->sin_addr.s_addr == INADDR_ANY)
	return TRUE;

    return FALSE;
}

static void
ipv4_anyaddr (struct sockaddr *sa, krb5_socklen_t *sa_size, int port)
{
    struct sockaddr_in tmp;

    memset (&tmp, 0, sizeof(tmp));
    tmp.sin_family = AF_INET;
    tmp.sin_port   = port;
    tmp.sin_addr.s_addr = INADDR_ANY;
    memcpy(sa, &tmp, min(sizeof(tmp), *sa_size));
    *sa_size = sizeof(tmp);
}

static int
ipv4_print_addr (const krb5_address *addr, char *str, size_t len)
{
    struct in_addr ia;

    memcpy (&ia, addr->address.data, 4);

    return snprintf (str, len, "IPv4:%s", inet_ntoa(ia));
}

static int
ipv4_parse_addr (krb5_context context, const char *address, krb5_address *addr)
{
    const char *p;
    struct in_addr a;

    p = strchr(address, ':');
    if(p) {
	p++;
	if(strncasecmp(address, "ip:", p - address) != 0 &&
	   strncasecmp(address, "ip4:", p - address) != 0 &&
	   strncasecmp(address, "ipv4:", p - address) != 0 &&
	   strncasecmp(address, "inet:", p - address) != 0)
	    return -1;
    } else
	p = address;
#ifdef HAVE_INET_ATON
    if(inet_aton(p, &a) == 0)
	return -1;
#elif defined(HAVE_INET_ADDR)
    a.s_addr = inet_addr(p);
    if(a.s_addr == INADDR_NONE)
	return -1;
#else
    return -1;
#endif
    addr->addr_type = KRB5_ADDRESS_INET;
    if(krb5_data_alloc(&addr->address, 4) != 0)
	return -1;
    _krb5_put_int(addr->address.data, ntohl(a.s_addr), addr->address.length);
    return 0;
}

static int
ipv4_mask_boundary(krb5_context context, const krb5_address *inaddr,
		   unsigned long len, krb5_address *low, krb5_address *high)
{
    unsigned long ia;
    u_int32_t l, h, m = 0xffffffff;

    if (len > 32) {
	krb5_set_error_string(context, "IPv4 prefix too large (%ld)", len);
	return KRB5_PROG_ATYPE_NOSUPP;
    }
    m = m << (32 - len);

    _krb5_get_int(inaddr->address.data, &ia, inaddr->address.length);

    l = ia & m;
    h = l | ~m;

    low->addr_type = KRB5_ADDRESS_INET;
    if(krb5_data_alloc(&low->address, 4) != 0)
	return -1;
    _krb5_put_int(low->address.data, l, low->address.length);

    high->addr_type = KRB5_ADDRESS_INET;
    if(krb5_data_alloc(&high->address, 4) != 0) {
	krb5_free_address(context, low);
	return -1;
    }
    _krb5_put_int(high->address.data, h, high->address.length);

    return 0;
}


/*
 * AF_INET6 - aka IPv6 implementation
 */

#ifdef HAVE_IPV6

static krb5_error_code
ipv6_sockaddr2addr (const struct sockaddr *sa, krb5_address *a)
{
    const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sa;

    if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
	unsigned char buf[4];

	a->addr_type      = KRB5_ADDRESS_INET;
#ifndef IN6_ADDR_V6_TO_V4
#ifdef IN6_EXTRACT_V4ADDR
#define IN6_ADDR_V6_TO_V4(x) (&IN6_EXTRACT_V4ADDR(x))
#else
#define IN6_ADDR_V6_TO_V4(x) ((const struct in_addr *)&(x)->s6_addr[12])
#endif
#endif
	memcpy (buf, IN6_ADDR_V6_TO_V4(&sin6->sin6_addr), 4);
	return krb5_data_copy(&a->address, buf, 4);
    } else {
	a->addr_type = KRB5_ADDRESS_INET6;
	return krb5_data_copy(&a->address,
			      &sin6->sin6_addr,
			      sizeof(sin6->sin6_addr));
    }
}

static krb5_error_code
ipv6_sockaddr2port (const struct sockaddr *sa, int16_t *port)
{
    const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sa;

    *port = sin6->sin6_port;
    return 0;
}

static void
ipv6_addr2sockaddr (const krb5_address *a,
		    struct sockaddr *sa,
		    krb5_socklen_t *sa_size,
		    int port)
{
    struct sockaddr_in6 tmp;

    memset (&tmp, 0, sizeof(tmp));
    tmp.sin6_family = AF_INET6;
    memcpy (&tmp.sin6_addr, a->address.data, sizeof(tmp.sin6_addr));
    tmp.sin6_port = port;
    memcpy(sa, &tmp, min(sizeof(tmp), *sa_size));
    *sa_size = sizeof(tmp);
}

static void
ipv6_h_addr2sockaddr(const char *addr,
		     struct sockaddr *sa,
		     krb5_socklen_t *sa_size,
		     int port)
{
    struct sockaddr_in6 tmp;

    memset (&tmp, 0, sizeof(tmp));
    tmp.sin6_family = AF_INET6;
    tmp.sin6_port   = port;
    tmp.sin6_addr   = *((const struct in6_addr *)addr);
    memcpy(sa, &tmp, min(sizeof(tmp), *sa_size));
    *sa_size = sizeof(tmp);
}

static krb5_error_code
ipv6_h_addr2addr (const char *addr,
		  krb5_address *a)
{
    a->addr_type = KRB5_ADDRESS_INET6;
    return krb5_data_copy(&a->address, addr, sizeof(struct in6_addr));
}

/*
 * 
 */

static krb5_boolean
ipv6_uninteresting (const struct sockaddr *sa)
{
    const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sa;
    const struct in6_addr *in6 = (const struct in6_addr *)&sin6->sin6_addr;
    
    return
	IN6_IS_ADDR_LINKLOCAL(in6)
	|| IN6_IS_ADDR_V4COMPAT(in6);
}

static void
ipv6_anyaddr (struct sockaddr *sa, krb5_socklen_t *sa_size, int port)
{
    struct sockaddr_in6 tmp;

    memset (&tmp, 0, sizeof(tmp));
    tmp.sin6_family = AF_INET6;
    tmp.sin6_port   = port;
    tmp.sin6_addr   = in6addr_any;
    *sa_size = sizeof(tmp);
}

static int
ipv6_print_addr (const krb5_address *addr, char *str, size_t len)
{
    char buf[128], buf2[3];
#ifdef HAVE_INET_NTOP
    if(inet_ntop(AF_INET6, addr->address.data, buf, sizeof(buf)) == NULL)
#endif
	{
	    /* XXX this is pretty ugly, but better than abort() */
	    int i;
	    unsigned char *p = addr->address.data;
	    buf[0] = '\0';
	    for(i = 0; i < addr->address.length; i++) {
		snprintf(buf2, sizeof(buf2), "%02x", p[i]);
		if(i > 0 && (i & 1) == 0)
		    strlcat(buf, ":", sizeof(buf));
		strlcat(buf, buf2, sizeof(buf));
	    }
	}
    return snprintf(str, len, "IPv6:%s", buf);
}

static int
ipv6_parse_addr (krb5_context context, const char *address, krb5_address *addr)
{
    int ret;
    struct in6_addr in6;
    const char *p;

    p = strchr(address, ':');
    if(p) {
	p++;
	if(strncasecmp(address, "ip6:", p - address) == 0 ||
	   strncasecmp(address, "ipv6:", p - address) == 0 ||
	   strncasecmp(address, "inet6:", p - address) == 0)
	    address = p;
    }

    ret = inet_pton(AF_INET6, address, &in6.s6_addr);
    if(ret == 1) {
	addr->addr_type = KRB5_ADDRESS_INET6;
	ret = krb5_data_alloc(&addr->address, sizeof(in6.s6_addr));
	if (ret)
	    return -1;
	memcpy(addr->address.data, in6.s6_addr, sizeof(in6.s6_addr));
	return 0;
    }
    return -1;
}

static int
ipv6_mask_boundary(krb5_context context, const krb5_address *inaddr,
		   unsigned long len, krb5_address *low, krb5_address *high)
{
    struct in6_addr addr, laddr, haddr;
    u_int32_t m;
    int i, sub_len;

    if (len > 128) {
	krb5_set_error_string(context, "IPv6 prefix too large (%ld)", len);
	return KRB5_PROG_ATYPE_NOSUPP;
    }

    if (inaddr->address.length != sizeof(addr)) {
	krb5_set_error_string(context, "IPv6 addr bad length");
	return KRB5_PROG_ATYPE_NOSUPP;
    }

    memcpy(&addr, inaddr->address.data, inaddr->address.length);

    for (i = 0; i < 16; i++) {
	sub_len = min(8, len);

	m = 0xff << (8 - sub_len);
	
	laddr.s6_addr[i] = addr.s6_addr[i] & m;
	haddr.s6_addr[i] = (addr.s6_addr[i] & m) | ~m;

	if (len > 8)
	    len -= 8;
	else
	    len = 0;
    }

    low->addr_type = KRB5_ADDRESS_INET6;
    if (krb5_data_alloc(&low->address, sizeof(laddr.s6_addr)) != 0)
	return -1;
    memcpy(low->address.data, laddr.s6_addr, sizeof(laddr.s6_addr));

    high->addr_type = KRB5_ADDRESS_INET6;
    if (krb5_data_alloc(&high->address, sizeof(haddr.s6_addr)) != 0) {
	krb5_free_address(context, low);
	return -1;
    }
    memcpy(high->address.data, haddr.s6_addr, sizeof(haddr.s6_addr));

    return 0;
}

#endif /* IPv6 */

/*
 * table
 */

#define KRB5_ADDRESS_ARANGE	(-100)

struct arange {
    krb5_address low;
    krb5_address high;
};

static int
arange_parse_addr (krb5_context context, 
		   const char *address, krb5_address *addr)
{
    char buf[1024], *p;
    krb5_address low0, high0;
    struct arange *a;
    krb5_error_code ret;
    
    if(strncasecmp(address, "RANGE:", 6) != 0)
	return -1;
    
    address += 6;

    p = strrchr(address, '/');
    if (p) {
	krb5_addresses addrmask;
	char *q;
	long num;

	if (strlcpy(buf, address, sizeof(buf)) > sizeof(buf))
	    return -1;
	buf[p - address] = '\0';
	ret = krb5_parse_address(context, buf, &addrmask);
	if (ret)
	    return ret;
	if(addrmask.len != 1) {
	    krb5_free_addresses(context, &addrmask);
	    return -1;
	}
	
	address += p - address + 1;

	num = strtol(address, &q, 10);
	if (q == address || *q != '\0' || num < 0) {
	    krb5_free_addresses(context, &addrmask);
	    return -1;
	}

	ret = krb5_address_prefixlen_boundary(context, &addrmask.val[0], num,
					      &low0, &high0);
	krb5_free_addresses(context, &addrmask);
	if (ret)
	    return ret;

    } else {
	krb5_addresses low, high;
	
	strsep_copy(&address, "-", buf, sizeof(buf));
	ret = krb5_parse_address(context, buf, &low);
	if(ret)
	    return ret;
	if(low.len != 1) {
	    krb5_free_addresses(context, &low);
	    return -1;
	}
	
	strsep_copy(&address, "-", buf, sizeof(buf));
	ret = krb5_parse_address(context, buf, &high);
	if(ret) {
	    krb5_free_addresses(context, &low);
	    return ret;
	}
	
	if(high.len != 1 && high.val[0].addr_type != low.val[0].addr_type) {
	    krb5_free_addresses(context, &low);
	    krb5_free_addresses(context, &high);
	    return -1;
	}

	ret = krb5_copy_address(context, &high.val[0], &high0);
	if (ret == 0) {
	    ret = krb5_copy_address(context, &low.val[0], &low0);
	    if (ret)
		krb5_free_address(context, &high0);
	}
	krb5_free_addresses(context, &low);
	krb5_free_addresses(context, &high);
	if (ret)
	    return ret;
    }

    krb5_data_alloc(&addr->address, sizeof(*a));
    addr->addr_type = KRB5_ADDRESS_ARANGE;
    a = addr->address.data;

    if(krb5_address_order(context, &low0, &high0) < 0) {
	a->low = low0;
	a->high = high0;
    } else {
	a->low = high0;
	a->high = low0;
    }
    return 0;
}

static int
arange_free (krb5_context context, krb5_address *addr)
{
    struct arange *a;
    a = addr->address.data;
    krb5_free_address(context, &a->low);
    krb5_free_address(context, &a->high);
    return 0;
}


static int
arange_copy (krb5_context context, const krb5_address *inaddr, 
	     krb5_address *outaddr)
{
    krb5_error_code ret;
    struct arange *i, *o;

    outaddr->addr_type = KRB5_ADDRESS_ARANGE;
    ret = krb5_data_alloc(&outaddr->address, sizeof(*o));
    if(ret)
	return ret;
    i = inaddr->address.data;
    o = outaddr->address.data;
    ret = krb5_copy_address(context, &i->low, &o->low);
    if(ret) {
	krb5_data_free(&outaddr->address);
	return ret;
    }
    ret = krb5_copy_address(context, &i->high, &o->high);
    if(ret) {
	krb5_free_address(context, &o->low);
	krb5_data_free(&outaddr->address);
	return ret;
    }
    return 0;
}

static int
arange_print_addr (const krb5_address *addr, char *str, size_t len)
{
    struct arange *a;
    krb5_error_code ret;
    size_t l, size, ret_len;

    a = addr->address.data;

    l = strlcpy(str, "RANGE:", len);
    ret_len = l;
    if (l > len)
	l = len;
    size = l;
	
    ret = krb5_print_address (&a->low, str + size, len - size, &l);
    if (ret)
	return ret;
    ret_len += l;
    if (len - size > l)
	size += l;
    else
	size = len;

    l = strlcat(str + size, "-", len - size);
    ret_len += l;
    if (len - size > l)
	size += l;
    else
	size = len;

    ret = krb5_print_address (&a->high, str + size, len - size, &l);
    if (ret)
	return ret;
    ret_len += l;

    return ret_len;
}

static int
arange_order_addr(krb5_context context, 
		  const krb5_address *addr1, 
		  const krb5_address *addr2)
{
    int tmp1, tmp2, sign;
    struct arange *a;
    const krb5_address *a2;

    if(addr1->addr_type == KRB5_ADDRESS_ARANGE) {
	a = addr1->address.data;
	a2 = addr2;
	sign = 1;
    } else if(addr2->addr_type == KRB5_ADDRESS_ARANGE) {
	a = addr2->address.data;
	a2 = addr1;
	sign = -1;
    } else
	abort();
	
    if(a2->addr_type == KRB5_ADDRESS_ARANGE) {
	struct arange *b = a2->address.data;
	tmp1 = krb5_address_order(context, &a->low, &b->low);
	if(tmp1 != 0)
	    return sign * tmp1;
	return sign * krb5_address_order(context, &a->high, &b->high);
    } else if(a2->addr_type == a->low.addr_type) {
	tmp1 = krb5_address_order(context, &a->low, a2);
	if(tmp1 > 0)
	    return sign;
	tmp2 = krb5_address_order(context, &a->high, a2);
	if(tmp2 < 0)
	    return -sign;
	return 0;
    } else {
	return sign * (addr1->addr_type - addr2->addr_type);
    }
}

static int
addrport_print_addr (const krb5_address *addr, char *str, size_t len)
{
    krb5_error_code ret;
    krb5_address addr1, addr2;
    uint16_t port = 0;
    size_t ret_len = 0, l, size = 0;
    krb5_storage *sp;

    sp = krb5_storage_from_data((krb5_data*)rk_UNCONST(&addr->address));
    /* for totally obscure reasons, these are not in network byteorder */
    krb5_storage_set_byteorder(sp, KRB5_STORAGE_BYTEORDER_LE);

    krb5_storage_seek(sp, 2, SEEK_CUR); /* skip first two bytes */
    krb5_ret_address(sp, &addr1);

    krb5_storage_seek(sp, 2, SEEK_CUR); /* skip two bytes */
    krb5_ret_address(sp, &addr2);
    krb5_storage_free(sp);
    if(addr2.addr_type == KRB5_ADDRESS_IPPORT && addr2.address.length == 2) {
	unsigned long value;
	_krb5_get_int(addr2.address.data, &value, 2);
	port = value;
    }
    l = strlcpy(str, "ADDRPORT:", len);
    ret_len += l;
    if (len > l)
	size += l;
    else
	size = len;

    ret = krb5_print_address(&addr1, str + size, len - size, &l);
    if (ret)
	return ret;
    ret_len += l;
    if (len - size > l)
	size += l;
    else
	size = len;

    ret = snprintf(str + size, len - size, ",PORT=%u", port);
    if (ret < 0)
	return EINVAL;
    ret_len += ret;
    return ret_len;
}

static struct addr_operations at[] = {
    {AF_INET,	KRB5_ADDRESS_INET, sizeof(struct sockaddr_in),
     ipv4_sockaddr2addr, 
     ipv4_sockaddr2port,
     ipv4_addr2sockaddr,
     ipv4_h_addr2sockaddr,
     ipv4_h_addr2addr,
     ipv4_uninteresting, ipv4_anyaddr, ipv4_print_addr, ipv4_parse_addr,
     NULL, NULL, NULL, ipv4_mask_boundary },
#ifdef HAVE_IPV6
    {AF_INET6,	KRB5_ADDRESS_INET6, sizeof(struct sockaddr_in6),
     ipv6_sockaddr2addr, 
     ipv6_sockaddr2port,
     ipv6_addr2sockaddr,
     ipv6_h_addr2sockaddr,
     ipv6_h_addr2addr,
     ipv6_uninteresting, ipv6_anyaddr, ipv6_print_addr, ipv6_parse_addr,
     NULL, NULL, NULL, ipv6_mask_boundary } ,
#endif
    {KRB5_ADDRESS_ADDRPORT, KRB5_ADDRESS_ADDRPORT, 0,
     NULL, NULL, NULL, NULL, NULL, 
     NULL, NULL, addrport_print_addr, NULL, NULL, NULL, NULL },
    /* fake address type */
    {KRB5_ADDRESS_ARANGE, KRB5_ADDRESS_ARANGE, sizeof(struct arange),
     NULL, NULL, NULL, NULL, NULL, NULL, NULL,
     arange_print_addr, arange_parse_addr, 
     arange_order_addr, arange_free, arange_copy }
};

static int num_addrs = sizeof(at) / sizeof(at[0]);

static size_t max_sockaddr_size = 0;

/*
 * generic functions
 */

static struct addr_operations *
find_af(int af)
{
    struct addr_operations *a;

    for (a = at; a < at + num_addrs; ++a)
	if (af == a->af)
	    return a;
    return NULL;
}

static struct addr_operations *
find_atype(int atype)
{
    struct addr_operations *a;

    for (a = at; a < at + num_addrs; ++a)
	if (atype == a->atype)
	    return a;
    return NULL;
}

krb5_error_code KRB5_LIB_FUNCTION
krb5_sockaddr2address (krb5_context context,
		       const struct sockaddr *sa, krb5_address *addr)
{
    struct addr_operations *a = find_af(sa->sa_family);
    if (a == NULL) {
	krb5_set_error_string (context, "Address family %d not supported",
			       sa->sa_family);
	return KRB5_PROG_ATYPE_NOSUPP;
    }
    return (*a->sockaddr2addr)(sa, addr);
}

krb5_error_code KRB5_LIB_FUNCTION
krb5_sockaddr2port (krb5_context context,
		    const struct sockaddr *sa, int16_t *port)
{
    struct addr_operations *a = find_af(sa->sa_family);
    if (a == NULL) {
	krb5_set_error_string (context, "Address family %d not supported",
			       sa->sa_family);
	return KRB5_PROG_ATYPE_NOSUPP;
    }
    return (*a->sockaddr2port)(sa, port);
}

krb5_error_code KRB5_LIB_FUNCTION
krb5_addr2sockaddr (krb5_context context,
		    const krb5_address *addr,
		    struct sockaddr *sa,
		    krb5_socklen_t *sa_size,
		    int port)
{
    struct addr_operations *a = find_atype(addr->addr_type);

    if (a == NULL) {
	krb5_set_error_string (context, "Address type %d not supported",
			       addr->addr_type);
	return KRB5_PROG_ATYPE_NOSUPP;
    }
    if (a->addr2sockaddr == NULL) {
	krb5_set_error_string (context, "Can't convert address type %d to sockaddr",
			       addr->addr_type);
	return KRB5_PROG_ATYPE_NOSUPP;
    }
    (*a->addr2sockaddr)(addr, sa, sa_size, port);
    return 0;
}

size_t KRB5_LIB_FUNCTION
krb5_max_sockaddr_size (void)
{
    if (max_sockaddr_size == 0) {
	struct addr_operations *a;

	for(a = at; a < at + num_addrs; ++a)
	    max_sockaddr_size = max(max_sockaddr_size, a->max_sockaddr_size);
    }
    return max_sockaddr_size;
}

krb5_boolean KRB5_LIB_FUNCTION
krb5_sockaddr_uninteresting(const struct sockaddr *sa)
{
    struct addr_operations *a = find_af(sa->sa_family);
    if (a == NULL || a->uninteresting == NULL)
	return TRUE;
    return (*a->uninteresting)(sa);
}

krb5_error_code KRB5_LIB_FUNCTION
krb5_h_addr2sockaddr (krb5_context context,
		      int af,
		      const char *addr, struct sockaddr *sa,
		      krb5_socklen_t *sa_size,
		      int port)
{
    struct addr_operations *a = find_af(af);
    if (a == NULL) {
	krb5_set_error_string (context, "Address family %d not supported", af);
	return KRB5_PROG_ATYPE_NOSUPP;
    }
    (*a->h_addr2sockaddr)(addr, sa, sa_size, port);
    return 0;
}

krb5_error_code KRB5_LIB_FUNCTION
krb5_h_addr2addr (krb5_context context,
		  int af,
		  const char *haddr, krb5_address *addr)
{
    struct addr_operations *a = find_af(af);
    if (a == NULL) {
	krb5_set_error_string (context, "Address family %d not supported", af);
	return KRB5_PROG_ATYPE_NOSUPP;
    }
    return (*a->h_addr2addr)(haddr, addr);
}

krb5_error_code KRB5_LIB_FUNCTION
krb5_anyaddr (krb5_context context,
	      int af,
	      struct sockaddr *sa,
	      krb5_socklen_t *sa_size,
	      int port)
{
    struct addr_operations *a = find_af (af);

    if (a == NULL) {
	krb5_set_error_string (context, "Address family %d not supported", af);
	return KRB5_PROG_ATYPE_NOSUPP;
    }

    (*a->anyaddr)(sa, sa_size, port);
    return 0;
}

krb5_error_code KRB5_LIB_FUNCTION
krb5_print_address (const krb5_address *addr, 
		    char *str, size_t len, size_t *ret_len)
{
    struct addr_operations *a = find_atype(addr->addr_type);
    int ret;

    if (a == NULL || a->print_addr == NULL) {
	char *s;
	int l;
	int i;

	s = str;
	l = snprintf(s, len, "TYPE_%d:", addr->addr_type);
	if (l < 0 || l >= len)
	    return EINVAL;
	s += l;
	len -= l;
	for(i = 0; i < addr->address.length; i++) {
	    l = snprintf(s, len, "%02x", ((char*)addr->address.data)[i]);
	    if (l < 0 || l >= len)
		return EINVAL;
	    len -= l;
	    s += l;
	}
	if(ret_len != NULL)
	    *ret_len = s - str;
	return 0;
    }
    ret = (*a->print_addr)(addr, str, len);
    if (ret < 0)
	return EINVAL;
    if(ret_len != NULL)
	*ret_len = ret;
    return 0;
}

krb5_error_code KRB5_LIB_FUNCTION
krb5_parse_address(krb5_context context,
		   const char *string,
		   krb5_addresses *addresses)
{
    int i, n;
    struct addrinfo *ai, *a;
    int error;
    int save_errno;

    addresses->len = 0;
    addresses->val = NULL;

    for(i = 0; i < num_addrs; i++) {
	if(at[i].parse_addr) {
	    krb5_address addr;
	    if((*at[i].parse_addr)(context, string, &addr) == 0) {
		ALLOC_SEQ(addresses, 1);
		if (addresses->val == NULL) {
		    krb5_set_error_string(context, "malloc: out of memory");
		    return ENOMEM;
		}
		addresses->val[0] = addr;
		return 0;
	    }
	}
    }

    error = getaddrinfo (string, NULL, NULL, &ai);
    if (error) {
	save_errno = errno;
	krb5_set_error_string (context, "%s: %s", string, gai_strerror(error));
	return krb5_eai_to_heim_errno(error, save_errno);
    }
    
    n = 0;
    for (a = ai; a != NULL; a = a->ai_next)
	++n;

    ALLOC_SEQ(addresses, n);
    if (addresses->val == NULL) {
	krb5_set_error_string(context, "malloc: out of memory");
	freeaddrinfo(ai);
	return ENOMEM;
    }

    addresses->len = 0;
    for (a = ai, i = 0; a != NULL; a = a->ai_next) {
	if (krb5_sockaddr2address (context, ai->ai_addr, &addresses->val[i]))
	    continue;
	if(krb5_address_search(context, &addresses->val[i], addresses))
	    continue;
	addresses->len = i;
	i++;
    }
    freeaddrinfo (ai);
    return 0;
}

int KRB5_LIB_FUNCTION
krb5_address_order(krb5_context context,
		   const krb5_address *addr1,
		   const krb5_address *addr2)
{
    /* this sucks; what if both addresses have order functions, which
       should we call? this works for now, though */
    struct addr_operations *a;
    a = find_atype(addr1->addr_type); 
    if(a == NULL) {
	krb5_set_error_string (context, "Address family %d not supported", 
			       addr1->addr_type);
	return KRB5_PROG_ATYPE_NOSUPP;
    }
    if(a->order_addr != NULL) 
	return (*a->order_addr)(context, addr1, addr2); 
    a = find_atype(addr2->addr_type); 
    if(a == NULL) {
	krb5_set_error_string (context, "Address family %d not supported", 
			       addr2->addr_type);
	return KRB5_PROG_ATYPE_NOSUPP;
    }
    if(a->order_addr != NULL) 
	return (*a->order_addr)(context, addr1, addr2);

    if(addr1->addr_type != addr2->addr_type)
	return addr1->addr_type - addr2->addr_type;
    if(addr1->address.length != addr2->address.length)
	return addr1->address.length - addr2->address.length;
    return memcmp (addr1->address.data,
		   addr2->address.data,
		   addr1->address.length);
}

krb5_boolean KRB5_LIB_FUNCTION
krb5_address_compare(krb5_context context,
		     const krb5_address *addr1,
		     const krb5_address *addr2)
{
    return krb5_address_order (context, addr1, addr2) == 0;
}

krb5_boolean KRB5_LIB_FUNCTION
krb5_address_search(krb5_context context,
		    const krb5_address *addr,
		    const krb5_addresses *addrlist)
{
    int i;

    for (i = 0; i < addrlist->len; ++i)
	if (krb5_address_compare (context, addr, &addrlist->val[i]))
	    return TRUE;
    return FALSE;
}

krb5_error_code KRB5_LIB_FUNCTION
krb5_free_address(krb5_context context,
		  krb5_address *address)
{
    struct addr_operations *a = find_atype (address->addr_type);
    if(a != NULL && a->free_addr != NULL)
	return (*a->free_addr)(context, address);
    krb5_data_free (&address->address);
    memset(address, 0, sizeof(*address));
    return 0;
}

krb5_error_code KRB5_LIB_FUNCTION
krb5_free_addresses(krb5_context context,
		    krb5_addresses *addresses)
{
    int i;
    for(i = 0; i < addresses->len; i++)
	krb5_free_address(context, &addresses->val[i]);
    free(addresses->val);
    addresses->len = 0;
    addresses->val = NULL;
    return 0;
}

krb5_error_code KRB5_LIB_FUNCTION
krb5_copy_address(krb5_context context,
		  const krb5_address *inaddr,
		  krb5_address *outaddr)
{
    struct addr_operations *a = find_af (inaddr->addr_type);
    if(a != NULL && a->copy_addr != NULL)
	return (*a->copy_addr)(context, inaddr, outaddr);
    return copy_HostAddress(inaddr, outaddr);
}

krb5_error_code KRB5_LIB_FUNCTION
krb5_copy_addresses(krb5_context context,
		    const krb5_addresses *inaddr,
		    krb5_addresses *outaddr)
{
    int i;
    ALLOC_SEQ(outaddr, inaddr->len);
    if(inaddr->len > 0 && outaddr->val == NULL)
	return ENOMEM;
    for(i = 0; i < inaddr->len; i++)
	krb5_copy_address(context, &inaddr->val[i], &outaddr->val[i]);
    return 0;
}

krb5_error_code KRB5_LIB_FUNCTION
krb5_append_addresses(krb5_context context,
		      krb5_addresses *dest,
		      const krb5_addresses *source)
{
    krb5_address *tmp;
    krb5_error_code ret;
    int i;
    if(source->len > 0) {
	tmp = realloc(dest->val, (dest->len + source->len) * sizeof(*tmp));
	if(tmp == NULL) {
	    krb5_set_error_string(context, "realloc: out of memory");
	    return ENOMEM;
	}
	dest->val = tmp;
	for(i = 0; i < source->len; i++) {
	    /* skip duplicates */
	    if(krb5_address_search(context, &source->val[i], dest))
		continue;
	    ret = krb5_copy_address(context, 
				    &source->val[i], 
				    &dest->val[dest->len]);
	    if(ret)
		return ret;
	    dest->len++;
	}
    }
    return 0;
}

/*
 * Create an address of type KRB5_ADDRESS_ADDRPORT from (addr, port)
 */

krb5_error_code KRB5_LIB_FUNCTION
krb5_make_addrport (krb5_context context,
		    krb5_address **res, const krb5_address *addr, int16_t port)
{
    krb5_error_code ret;
    size_t len = addr->address.length + 2 + 4 * 4;
    u_char *p;

    *res = malloc (sizeof(**res));
    if (*res == NULL) {
	krb5_set_error_string(context, "malloc: out of memory");
	return ENOMEM;
    }
    (*res)->addr_type = KRB5_ADDRESS_ADDRPORT;
    ret = krb5_data_alloc (&(*res)->address, len);
    if (ret) {
	krb5_set_error_string(context, "malloc: out of memory");
	free (*res);
	*res = NULL;
	return ret;
    }
    p = (*res)->address.data;
    *p++ = 0;
    *p++ = 0;
    *p++ = (addr->addr_type     ) & 0xFF;
    *p++ = (addr->addr_type >> 8) & 0xFF;

    *p++ = (addr->address.length      ) & 0xFF;
    *p++ = (addr->address.length >>  8) & 0xFF;
    *p++ = (addr->address.length >> 16) & 0xFF;
    *p++ = (addr->address.length >> 24) & 0xFF;

    memcpy (p, addr->address.data, addr->address.length);
    p += addr->address.length;

    *p++ = 0;
    *p++ = 0;
    *p++ = (KRB5_ADDRESS_IPPORT     ) & 0xFF;
    *p++ = (KRB5_ADDRESS_IPPORT >> 8) & 0xFF;

    *p++ = (2      ) & 0xFF;
    *p++ = (2 >>  8) & 0xFF;
    *p++ = (2 >> 16) & 0xFF;
    *p++ = (2 >> 24) & 0xFF;

    memcpy (p, &port, 2);
    p += 2;

    return 0;
}

/*
 * Calculate the boundary addresses of `inaddr'/`prefixlen' and store
 * them in `low' and `high'.
 */

krb5_error_code KRB5_LIB_FUNCTION
krb5_address_prefixlen_boundary(krb5_context context,
				const krb5_address *inaddr,
				unsigned long prefixlen,
				krb5_address *low,
				krb5_address *high)
{
    struct addr_operations *a = find_atype (inaddr->addr_type);
    if(a != NULL && a->mask_boundary != NULL)
	return (*a->mask_boundary)(context, inaddr, prefixlen, low, high);
    krb5_set_error_string(context, "Address family %d doesn't support "
			  "address mask operation", inaddr->addr_type);
    return KRB5_PROG_ATYPE_NOSUPP;
}