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16#include <linux/init.h>
17#include <linux/types.h>
18#include <linux/slab.h>
19#include <linux/audit.h>
20#include <linux/in.h>
21#include <linux/in6.h>
22#include <net/ip.h>
23#include <net/ipv6.h>
24#include <net/netlabel.h>
25#include <net/cipso_ipv4.h>
26#include <net/calipso.h>
27#include <asm/bug.h>
28#include <linux/atomic.h>
29
30#include "netlabel_domainhash.h"
31#include "netlabel_unlabeled.h"
32#include "netlabel_cipso_v4.h"
33#include "netlabel_calipso.h"
34#include "netlabel_user.h"
35#include "netlabel_mgmt.h"
36#include "netlabel_addrlist.h"
37
38
39
40
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42
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44
45
46
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48
49
50
51
52
53
54
55
56int netlbl_cfg_map_del(const char *domain,
57 u16 family,
58 const void *addr,
59 const void *mask,
60 struct netlbl_audit *audit_info)
61{
62 if (addr == NULL && mask == NULL) {
63 return netlbl_domhsh_remove(domain, family, audit_info);
64 } else if (addr != NULL && mask != NULL) {
65 switch (family) {
66 case AF_INET:
67 return netlbl_domhsh_remove_af4(domain, addr, mask,
68 audit_info);
69#if IS_ENABLED(CONFIG_IPV6)
70 case AF_INET6:
71 return netlbl_domhsh_remove_af6(domain, addr, mask,
72 audit_info);
73#endif
74 default:
75 return -EPFNOSUPPORT;
76 }
77 } else
78 return -EINVAL;
79}
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95int netlbl_cfg_unlbl_map_add(const char *domain,
96 u16 family,
97 const void *addr,
98 const void *mask,
99 struct netlbl_audit *audit_info)
100{
101 int ret_val = -ENOMEM;
102 struct netlbl_dom_map *entry;
103 struct netlbl_domaddr_map *addrmap = NULL;
104 struct netlbl_domaddr4_map *map4 = NULL;
105 struct netlbl_domaddr6_map *map6 = NULL;
106
107 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
108 if (entry == NULL)
109 return -ENOMEM;
110 if (domain != NULL) {
111 entry->domain = kstrdup(domain, GFP_ATOMIC);
112 if (entry->domain == NULL)
113 goto cfg_unlbl_map_add_failure;
114 }
115 entry->family = family;
116
117 if (addr == NULL && mask == NULL)
118 entry->def.type = NETLBL_NLTYPE_UNLABELED;
119 else if (addr != NULL && mask != NULL) {
120 addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
121 if (addrmap == NULL)
122 goto cfg_unlbl_map_add_failure;
123 INIT_LIST_HEAD(&addrmap->list4);
124 INIT_LIST_HEAD(&addrmap->list6);
125
126 switch (family) {
127 case AF_INET: {
128 const struct in_addr *addr4 = addr;
129 const struct in_addr *mask4 = mask;
130 map4 = kzalloc(sizeof(*map4), GFP_ATOMIC);
131 if (map4 == NULL)
132 goto cfg_unlbl_map_add_failure;
133 map4->def.type = NETLBL_NLTYPE_UNLABELED;
134 map4->list.addr = addr4->s_addr & mask4->s_addr;
135 map4->list.mask = mask4->s_addr;
136 map4->list.valid = 1;
137 ret_val = netlbl_af4list_add(&map4->list,
138 &addrmap->list4);
139 if (ret_val != 0)
140 goto cfg_unlbl_map_add_failure;
141 break;
142 }
143#if IS_ENABLED(CONFIG_IPV6)
144 case AF_INET6: {
145 const struct in6_addr *addr6 = addr;
146 const struct in6_addr *mask6 = mask;
147 map6 = kzalloc(sizeof(*map6), GFP_ATOMIC);
148 if (map6 == NULL)
149 goto cfg_unlbl_map_add_failure;
150 map6->def.type = NETLBL_NLTYPE_UNLABELED;
151 map6->list.addr = *addr6;
152 map6->list.addr.s6_addr32[0] &= mask6->s6_addr32[0];
153 map6->list.addr.s6_addr32[1] &= mask6->s6_addr32[1];
154 map6->list.addr.s6_addr32[2] &= mask6->s6_addr32[2];
155 map6->list.addr.s6_addr32[3] &= mask6->s6_addr32[3];
156 map6->list.mask = *mask6;
157 map6->list.valid = 1;
158 ret_val = netlbl_af6list_add(&map6->list,
159 &addrmap->list6);
160 if (ret_val != 0)
161 goto cfg_unlbl_map_add_failure;
162 break;
163 }
164#endif
165 default:
166 goto cfg_unlbl_map_add_failure;
167 }
168
169 entry->def.addrsel = addrmap;
170 entry->def.type = NETLBL_NLTYPE_ADDRSELECT;
171 } else {
172 ret_val = -EINVAL;
173 goto cfg_unlbl_map_add_failure;
174 }
175
176 ret_val = netlbl_domhsh_add(entry, audit_info);
177 if (ret_val != 0)
178 goto cfg_unlbl_map_add_failure;
179
180 return 0;
181
182cfg_unlbl_map_add_failure:
183 kfree(entry->domain);
184 kfree(entry);
185 kfree(addrmap);
186 kfree(map4);
187 kfree(map6);
188 return ret_val;
189}
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191
192
193
194
195
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197
198
199
200
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207
208int netlbl_cfg_unlbl_static_add(struct net *net,
209 const char *dev_name,
210 const void *addr,
211 const void *mask,
212 u16 family,
213 u32 secid,
214 struct netlbl_audit *audit_info)
215{
216 u32 addr_len;
217
218 switch (family) {
219 case AF_INET:
220 addr_len = sizeof(struct in_addr);
221 break;
222#if IS_ENABLED(CONFIG_IPV6)
223 case AF_INET6:
224 addr_len = sizeof(struct in6_addr);
225 break;
226#endif
227 default:
228 return -EPFNOSUPPORT;
229 }
230
231 return netlbl_unlhsh_add(net,
232 dev_name, addr, mask, addr_len,
233 secid, audit_info);
234}
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251int netlbl_cfg_unlbl_static_del(struct net *net,
252 const char *dev_name,
253 const void *addr,
254 const void *mask,
255 u16 family,
256 struct netlbl_audit *audit_info)
257{
258 u32 addr_len;
259
260 switch (family) {
261 case AF_INET:
262 addr_len = sizeof(struct in_addr);
263 break;
264#if IS_ENABLED(CONFIG_IPV6)
265 case AF_INET6:
266 addr_len = sizeof(struct in6_addr);
267 break;
268#endif
269 default:
270 return -EPFNOSUPPORT;
271 }
272
273 return netlbl_unlhsh_remove(net,
274 dev_name, addr, mask, addr_len,
275 audit_info);
276}
277
278
279
280
281
282
283
284
285
286
287
288int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def,
289 struct netlbl_audit *audit_info)
290{
291 return cipso_v4_doi_add(doi_def, audit_info);
292}
293
294
295
296
297
298
299
300
301
302
303
304void netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info)
305{
306 cipso_v4_doi_remove(doi, audit_info);
307}
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323int netlbl_cfg_cipsov4_map_add(u32 doi,
324 const char *domain,
325 const struct in_addr *addr,
326 const struct in_addr *mask,
327 struct netlbl_audit *audit_info)
328{
329 int ret_val = -ENOMEM;
330 struct cipso_v4_doi *doi_def;
331 struct netlbl_dom_map *entry;
332 struct netlbl_domaddr_map *addrmap = NULL;
333 struct netlbl_domaddr4_map *addrinfo = NULL;
334
335 doi_def = cipso_v4_doi_getdef(doi);
336 if (doi_def == NULL)
337 return -ENOENT;
338
339 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
340 if (entry == NULL)
341 goto out_entry;
342 entry->family = AF_INET;
343 if (domain != NULL) {
344 entry->domain = kstrdup(domain, GFP_ATOMIC);
345 if (entry->domain == NULL)
346 goto out_domain;
347 }
348
349 if (addr == NULL && mask == NULL) {
350 entry->def.cipso = doi_def;
351 entry->def.type = NETLBL_NLTYPE_CIPSOV4;
352 } else if (addr != NULL && mask != NULL) {
353 addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
354 if (addrmap == NULL)
355 goto out_addrmap;
356 INIT_LIST_HEAD(&addrmap->list4);
357 INIT_LIST_HEAD(&addrmap->list6);
358
359 addrinfo = kzalloc(sizeof(*addrinfo), GFP_ATOMIC);
360 if (addrinfo == NULL)
361 goto out_addrinfo;
362 addrinfo->def.cipso = doi_def;
363 addrinfo->def.type = NETLBL_NLTYPE_CIPSOV4;
364 addrinfo->list.addr = addr->s_addr & mask->s_addr;
365 addrinfo->list.mask = mask->s_addr;
366 addrinfo->list.valid = 1;
367 ret_val = netlbl_af4list_add(&addrinfo->list, &addrmap->list4);
368 if (ret_val != 0)
369 goto cfg_cipsov4_map_add_failure;
370
371 entry->def.addrsel = addrmap;
372 entry->def.type = NETLBL_NLTYPE_ADDRSELECT;
373 } else {
374 ret_val = -EINVAL;
375 goto out_addrmap;
376 }
377
378 ret_val = netlbl_domhsh_add(entry, audit_info);
379 if (ret_val != 0)
380 goto cfg_cipsov4_map_add_failure;
381
382 return 0;
383
384cfg_cipsov4_map_add_failure:
385 kfree(addrinfo);
386out_addrinfo:
387 kfree(addrmap);
388out_addrmap:
389 kfree(entry->domain);
390out_domain:
391 kfree(entry);
392out_entry:
393 cipso_v4_doi_putdef(doi_def);
394 return ret_val;
395}
396
397
398
399
400
401
402
403
404
405
406
407int netlbl_cfg_calipso_add(struct calipso_doi *doi_def,
408 struct netlbl_audit *audit_info)
409{
410#if IS_ENABLED(CONFIG_IPV6)
411 return calipso_doi_add(doi_def, audit_info);
412#else
413 return -ENOSYS;
414#endif
415}
416
417
418
419
420
421
422
423
424
425
426
427void netlbl_cfg_calipso_del(u32 doi, struct netlbl_audit *audit_info)
428{
429#if IS_ENABLED(CONFIG_IPV6)
430 calipso_doi_remove(doi, audit_info);
431#endif
432}
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434
435
436
437
438
439
440
441
442
443
444
445
446
447
448int netlbl_cfg_calipso_map_add(u32 doi,
449 const char *domain,
450 const struct in6_addr *addr,
451 const struct in6_addr *mask,
452 struct netlbl_audit *audit_info)
453{
454#if IS_ENABLED(CONFIG_IPV6)
455 int ret_val = -ENOMEM;
456 struct calipso_doi *doi_def;
457 struct netlbl_dom_map *entry;
458 struct netlbl_domaddr_map *addrmap = NULL;
459 struct netlbl_domaddr6_map *addrinfo = NULL;
460
461 doi_def = calipso_doi_getdef(doi);
462 if (doi_def == NULL)
463 return -ENOENT;
464
465 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
466 if (entry == NULL)
467 goto out_entry;
468 entry->family = AF_INET6;
469 if (domain != NULL) {
470 entry->domain = kstrdup(domain, GFP_ATOMIC);
471 if (entry->domain == NULL)
472 goto out_domain;
473 }
474
475 if (addr == NULL && mask == NULL) {
476 entry->def.calipso = doi_def;
477 entry->def.type = NETLBL_NLTYPE_CALIPSO;
478 } else if (addr != NULL && mask != NULL) {
479 addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
480 if (addrmap == NULL)
481 goto out_addrmap;
482 INIT_LIST_HEAD(&addrmap->list4);
483 INIT_LIST_HEAD(&addrmap->list6);
484
485 addrinfo = kzalloc(sizeof(*addrinfo), GFP_ATOMIC);
486 if (addrinfo == NULL)
487 goto out_addrinfo;
488 addrinfo->def.calipso = doi_def;
489 addrinfo->def.type = NETLBL_NLTYPE_CALIPSO;
490 addrinfo->list.addr = *addr;
491 addrinfo->list.addr.s6_addr32[0] &= mask->s6_addr32[0];
492 addrinfo->list.addr.s6_addr32[1] &= mask->s6_addr32[1];
493 addrinfo->list.addr.s6_addr32[2] &= mask->s6_addr32[2];
494 addrinfo->list.addr.s6_addr32[3] &= mask->s6_addr32[3];
495 addrinfo->list.mask = *mask;
496 addrinfo->list.valid = 1;
497 ret_val = netlbl_af6list_add(&addrinfo->list, &addrmap->list6);
498 if (ret_val != 0)
499 goto cfg_calipso_map_add_failure;
500
501 entry->def.addrsel = addrmap;
502 entry->def.type = NETLBL_NLTYPE_ADDRSELECT;
503 } else {
504 ret_val = -EINVAL;
505 goto out_addrmap;
506 }
507
508 ret_val = netlbl_domhsh_add(entry, audit_info);
509 if (ret_val != 0)
510 goto cfg_calipso_map_add_failure;
511
512 return 0;
513
514cfg_calipso_map_add_failure:
515 kfree(addrinfo);
516out_addrinfo:
517 kfree(addrmap);
518out_addrmap:
519 kfree(entry->domain);
520out_domain:
521 kfree(entry);
522out_entry:
523 calipso_doi_putdef(doi_def);
524 return ret_val;
525#else
526 return -ENOSYS;
527#endif
528}
529
530
531
532
533
534#define _CM_F_NONE 0x00000000
535#define _CM_F_ALLOC 0x00000001
536#define _CM_F_WALK 0x00000002
537
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541
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552
553static struct netlbl_lsm_catmap *_netlbl_catmap_getnode(
554 struct netlbl_lsm_catmap **catmap,
555 u32 offset,
556 unsigned int cm_flags,
557 gfp_t gfp_flags)
558{
559 struct netlbl_lsm_catmap *iter = *catmap;
560 struct netlbl_lsm_catmap *prev = NULL;
561
562 if (iter == NULL)
563 goto catmap_getnode_alloc;
564 if (offset < iter->startbit)
565 goto catmap_getnode_walk;
566 while (iter && offset >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
567 prev = iter;
568 iter = iter->next;
569 }
570 if (iter == NULL || offset < iter->startbit)
571 goto catmap_getnode_walk;
572
573 return iter;
574
575catmap_getnode_walk:
576 if (cm_flags & _CM_F_WALK)
577 return iter;
578catmap_getnode_alloc:
579 if (!(cm_flags & _CM_F_ALLOC))
580 return NULL;
581
582 iter = netlbl_catmap_alloc(gfp_flags);
583 if (iter == NULL)
584 return NULL;
585 iter->startbit = offset & ~(NETLBL_CATMAP_SIZE - 1);
586
587 if (prev == NULL) {
588 iter->next = *catmap;
589 *catmap = iter;
590 } else {
591 iter->next = prev->next;
592 prev->next = iter;
593 }
594
595 return iter;
596}
597
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606
607
608int netlbl_catmap_walk(struct netlbl_lsm_catmap *catmap, u32 offset)
609{
610 struct netlbl_lsm_catmap *iter = catmap;
611 u32 idx;
612 u32 bit;
613 NETLBL_CATMAP_MAPTYPE bitmap;
614
615 iter = _netlbl_catmap_getnode(&catmap, offset, _CM_F_WALK, 0);
616 if (iter == NULL)
617 return -ENOENT;
618 if (offset > iter->startbit) {
619 offset -= iter->startbit;
620 idx = offset / NETLBL_CATMAP_MAPSIZE;
621 bit = offset % NETLBL_CATMAP_MAPSIZE;
622 } else {
623 idx = 0;
624 bit = 0;
625 }
626 bitmap = iter->bitmap[idx] >> bit;
627
628 for (;;) {
629 if (bitmap != 0) {
630 while ((bitmap & NETLBL_CATMAP_BIT) == 0) {
631 bitmap >>= 1;
632 bit++;
633 }
634 return iter->startbit +
635 (NETLBL_CATMAP_MAPSIZE * idx) + bit;
636 }
637 if (++idx >= NETLBL_CATMAP_MAPCNT) {
638 if (iter->next != NULL) {
639 iter = iter->next;
640 idx = 0;
641 } else
642 return -ENOENT;
643 }
644 bitmap = iter->bitmap[idx];
645 bit = 0;
646 }
647
648 return -ENOENT;
649}
650EXPORT_SYMBOL(netlbl_catmap_walk);
651
652
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661
662
663int netlbl_catmap_walkrng(struct netlbl_lsm_catmap *catmap, u32 offset)
664{
665 struct netlbl_lsm_catmap *iter;
666 struct netlbl_lsm_catmap *prev = NULL;
667 u32 idx;
668 u32 bit;
669 NETLBL_CATMAP_MAPTYPE bitmask;
670 NETLBL_CATMAP_MAPTYPE bitmap;
671
672 iter = _netlbl_catmap_getnode(&catmap, offset, _CM_F_WALK, 0);
673 if (iter == NULL)
674 return -ENOENT;
675 if (offset > iter->startbit) {
676 offset -= iter->startbit;
677 idx = offset / NETLBL_CATMAP_MAPSIZE;
678 bit = offset % NETLBL_CATMAP_MAPSIZE;
679 } else {
680 idx = 0;
681 bit = 0;
682 }
683 bitmask = NETLBL_CATMAP_BIT << bit;
684
685 for (;;) {
686 bitmap = iter->bitmap[idx];
687 while (bitmask != 0 && (bitmap & bitmask) != 0) {
688 bitmask <<= 1;
689 bit++;
690 }
691
692 if (prev && idx == 0 && bit == 0)
693 return prev->startbit + NETLBL_CATMAP_SIZE - 1;
694 else if (bitmask != 0)
695 return iter->startbit +
696 (NETLBL_CATMAP_MAPSIZE * idx) + bit - 1;
697 else if (++idx >= NETLBL_CATMAP_MAPCNT) {
698 if (iter->next == NULL)
699 return iter->startbit + NETLBL_CATMAP_SIZE - 1;
700 prev = iter;
701 iter = iter->next;
702 idx = 0;
703 }
704 bitmask = NETLBL_CATMAP_BIT;
705 bit = 0;
706 }
707
708 return -ENOENT;
709}
710
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724
725int netlbl_catmap_getlong(struct netlbl_lsm_catmap *catmap,
726 u32 *offset,
727 unsigned long *bitmap)
728{
729 struct netlbl_lsm_catmap *iter;
730 u32 off = *offset;
731 u32 idx;
732
733
734 if ((off & (BITS_PER_LONG - 1)) != 0)
735 return -EINVAL;
736
737 if (off < catmap->startbit) {
738 off = catmap->startbit;
739 *offset = off;
740 }
741 iter = _netlbl_catmap_getnode(&catmap, off, _CM_F_WALK, 0);
742 if (iter == NULL) {
743 *offset = (u32)-1;
744 return 0;
745 }
746
747 if (off < iter->startbit) {
748 *offset = iter->startbit;
749 off = 0;
750 } else
751 off -= iter->startbit;
752 idx = off / NETLBL_CATMAP_MAPSIZE;
753 *bitmap = iter->bitmap[idx] >> (off % NETLBL_CATMAP_MAPSIZE);
754
755 return 0;
756}
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766
767
768
769int netlbl_catmap_setbit(struct netlbl_lsm_catmap **catmap,
770 u32 bit,
771 gfp_t flags)
772{
773 struct netlbl_lsm_catmap *iter;
774 u32 idx;
775
776 iter = _netlbl_catmap_getnode(catmap, bit, _CM_F_ALLOC, flags);
777 if (iter == NULL)
778 return -ENOMEM;
779
780 bit -= iter->startbit;
781 idx = bit / NETLBL_CATMAP_MAPSIZE;
782 iter->bitmap[idx] |= NETLBL_CATMAP_BIT << (bit % NETLBL_CATMAP_MAPSIZE);
783
784 return 0;
785}
786EXPORT_SYMBOL(netlbl_catmap_setbit);
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799
800int netlbl_catmap_setrng(struct netlbl_lsm_catmap **catmap,
801 u32 start,
802 u32 end,
803 gfp_t flags)
804{
805 int rc = 0;
806 u32 spot = start;
807
808 while (rc == 0 && spot <= end) {
809 if (((spot & (BITS_PER_LONG - 1)) == 0) &&
810 ((end - spot) > BITS_PER_LONG)) {
811 rc = netlbl_catmap_setlong(catmap,
812 spot,
813 (unsigned long)-1,
814 flags);
815 spot += BITS_PER_LONG;
816 } else
817 rc = netlbl_catmap_setbit(catmap, spot++, flags);
818 }
819
820 return rc;
821}
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834
835
836int netlbl_catmap_setlong(struct netlbl_lsm_catmap **catmap,
837 u32 offset,
838 unsigned long bitmap,
839 gfp_t flags)
840{
841 struct netlbl_lsm_catmap *iter;
842 u32 idx;
843
844
845 if ((offset & (BITS_PER_LONG - 1)) != 0)
846 return -EINVAL;
847
848 iter = _netlbl_catmap_getnode(catmap, offset, _CM_F_ALLOC, flags);
849 if (iter == NULL)
850 return -ENOMEM;
851
852 offset -= iter->startbit;
853 idx = offset / NETLBL_CATMAP_MAPSIZE;
854 iter->bitmap[idx] |= bitmap << (offset % NETLBL_CATMAP_MAPSIZE);
855
856 return 0;
857}
858
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873
874int netlbl_bitmap_walk(const unsigned char *bitmap, u32 bitmap_len,
875 u32 offset, u8 state)
876{
877 u32 bit_spot;
878 u32 byte_offset;
879 unsigned char bitmask;
880 unsigned char byte;
881
882 byte_offset = offset / 8;
883 byte = bitmap[byte_offset];
884 bit_spot = offset;
885 bitmask = 0x80 >> (offset % 8);
886
887 while (bit_spot < bitmap_len) {
888 if ((state && (byte & bitmask) == bitmask) ||
889 (state == 0 && (byte & bitmask) == 0))
890 return bit_spot;
891
892 if (++bit_spot >= bitmap_len)
893 return -1;
894 bitmask >>= 1;
895 if (bitmask == 0) {
896 byte = bitmap[++byte_offset];
897 bitmask = 0x80;
898 }
899 }
900
901 return -1;
902}
903EXPORT_SYMBOL(netlbl_bitmap_walk);
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905
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907
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910
911
912
913
914
915void netlbl_bitmap_setbit(unsigned char *bitmap, u32 bit, u8 state)
916{
917 u32 byte_spot;
918 u8 bitmask;
919
920
921 byte_spot = bit / 8;
922 bitmask = 0x80 >> (bit % 8);
923 if (state)
924 bitmap[byte_spot] |= bitmask;
925 else
926 bitmap[byte_spot] &= ~bitmask;
927}
928EXPORT_SYMBOL(netlbl_bitmap_setbit);
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946int netlbl_enabled(void)
947{
948
949
950
951 return (atomic_read(&netlabel_mgmt_protocount) > 0);
952}
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969int netlbl_sock_setattr(struct sock *sk,
970 u16 family,
971 const struct netlbl_lsm_secattr *secattr)
972{
973 int ret_val;
974 struct netlbl_dom_map *dom_entry;
975
976 rcu_read_lock();
977 dom_entry = netlbl_domhsh_getentry(secattr->domain, family);
978 if (dom_entry == NULL) {
979 ret_val = -ENOENT;
980 goto socket_setattr_return;
981 }
982 switch (family) {
983 case AF_INET:
984 switch (dom_entry->def.type) {
985 case NETLBL_NLTYPE_ADDRSELECT:
986 ret_val = -EDESTADDRREQ;
987 break;
988 case NETLBL_NLTYPE_CIPSOV4:
989 ret_val = cipso_v4_sock_setattr(sk,
990 dom_entry->def.cipso,
991 secattr);
992 break;
993 case NETLBL_NLTYPE_UNLABELED:
994 ret_val = 0;
995 break;
996 default:
997 ret_val = -ENOENT;
998 }
999 break;
1000#if IS_ENABLED(CONFIG_IPV6)
1001 case AF_INET6:
1002 switch (dom_entry->def.type) {
1003 case NETLBL_NLTYPE_ADDRSELECT:
1004 ret_val = -EDESTADDRREQ;
1005 break;
1006 case NETLBL_NLTYPE_CALIPSO:
1007 ret_val = calipso_sock_setattr(sk,
1008 dom_entry->def.calipso,
1009 secattr);
1010 break;
1011 case NETLBL_NLTYPE_UNLABELED:
1012 ret_val = 0;
1013 break;
1014 default:
1015 ret_val = -ENOENT;
1016 }
1017 break;
1018#endif
1019 default:
1020 ret_val = -EPROTONOSUPPORT;
1021 }
1022
1023socket_setattr_return:
1024 rcu_read_unlock();
1025 return ret_val;
1026}
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037void netlbl_sock_delattr(struct sock *sk)
1038{
1039 switch (sk->sk_family) {
1040 case AF_INET:
1041 cipso_v4_sock_delattr(sk);
1042 break;
1043#if IS_ENABLED(CONFIG_IPV6)
1044 case AF_INET6:
1045 calipso_sock_delattr(sk);
1046 break;
1047#endif
1048 }
1049}
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063int netlbl_sock_getattr(struct sock *sk,
1064 struct netlbl_lsm_secattr *secattr)
1065{
1066 int ret_val;
1067
1068 switch (sk->sk_family) {
1069 case AF_INET:
1070 ret_val = cipso_v4_sock_getattr(sk, secattr);
1071 break;
1072#if IS_ENABLED(CONFIG_IPV6)
1073 case AF_INET6:
1074 ret_val = calipso_sock_getattr(sk, secattr);
1075 break;
1076#endif
1077 default:
1078 ret_val = -EPROTONOSUPPORT;
1079 }
1080
1081 return ret_val;
1082}
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096int netlbl_conn_setattr(struct sock *sk,
1097 struct sockaddr *addr,
1098 const struct netlbl_lsm_secattr *secattr)
1099{
1100 int ret_val;
1101 struct sockaddr_in *addr4;
1102#if IS_ENABLED(CONFIG_IPV6)
1103 struct sockaddr_in6 *addr6;
1104#endif
1105 struct netlbl_dommap_def *entry;
1106
1107 rcu_read_lock();
1108 switch (addr->sa_family) {
1109 case AF_INET:
1110 addr4 = (struct sockaddr_in *)addr;
1111 entry = netlbl_domhsh_getentry_af4(secattr->domain,
1112 addr4->sin_addr.s_addr);
1113 if (entry == NULL) {
1114 ret_val = -ENOENT;
1115 goto conn_setattr_return;
1116 }
1117 switch (entry->type) {
1118 case NETLBL_NLTYPE_CIPSOV4:
1119 ret_val = cipso_v4_sock_setattr(sk,
1120 entry->cipso, secattr);
1121 break;
1122 case NETLBL_NLTYPE_UNLABELED:
1123
1124
1125 netlbl_sock_delattr(sk);
1126 ret_val = 0;
1127 break;
1128 default:
1129 ret_val = -ENOENT;
1130 }
1131 break;
1132#if IS_ENABLED(CONFIG_IPV6)
1133 case AF_INET6:
1134 addr6 = (struct sockaddr_in6 *)addr;
1135 entry = netlbl_domhsh_getentry_af6(secattr->domain,
1136 &addr6->sin6_addr);
1137 if (entry == NULL) {
1138 ret_val = -ENOENT;
1139 goto conn_setattr_return;
1140 }
1141 switch (entry->type) {
1142 case NETLBL_NLTYPE_CALIPSO:
1143 ret_val = calipso_sock_setattr(sk,
1144 entry->calipso, secattr);
1145 break;
1146 case NETLBL_NLTYPE_UNLABELED:
1147
1148
1149 netlbl_sock_delattr(sk);
1150 ret_val = 0;
1151 break;
1152 default:
1153 ret_val = -ENOENT;
1154 }
1155 break;
1156#endif
1157 default:
1158 ret_val = -EPROTONOSUPPORT;
1159 }
1160
1161conn_setattr_return:
1162 rcu_read_unlock();
1163 return ret_val;
1164}
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176int netlbl_req_setattr(struct request_sock *req,
1177 const struct netlbl_lsm_secattr *secattr)
1178{
1179 int ret_val;
1180 struct netlbl_dommap_def *entry;
1181 struct inet_request_sock *ireq = inet_rsk(req);
1182
1183 rcu_read_lock();
1184 switch (req->rsk_ops->family) {
1185 case AF_INET:
1186 entry = netlbl_domhsh_getentry_af4(secattr->domain,
1187 ireq->ir_rmt_addr);
1188 if (entry == NULL) {
1189 ret_val = -ENOENT;
1190 goto req_setattr_return;
1191 }
1192 switch (entry->type) {
1193 case NETLBL_NLTYPE_CIPSOV4:
1194 ret_val = cipso_v4_req_setattr(req,
1195 entry->cipso, secattr);
1196 break;
1197 case NETLBL_NLTYPE_UNLABELED:
1198 netlbl_req_delattr(req);
1199 ret_val = 0;
1200 break;
1201 default:
1202 ret_val = -ENOENT;
1203 }
1204 break;
1205#if IS_ENABLED(CONFIG_IPV6)
1206 case AF_INET6:
1207 entry = netlbl_domhsh_getentry_af6(secattr->domain,
1208 &ireq->ir_v6_rmt_addr);
1209 if (entry == NULL) {
1210 ret_val = -ENOENT;
1211 goto req_setattr_return;
1212 }
1213 switch (entry->type) {
1214 case NETLBL_NLTYPE_CALIPSO:
1215 ret_val = calipso_req_setattr(req,
1216 entry->calipso, secattr);
1217 break;
1218 case NETLBL_NLTYPE_UNLABELED:
1219 netlbl_req_delattr(req);
1220 ret_val = 0;
1221 break;
1222 default:
1223 ret_val = -ENOENT;
1224 }
1225 break;
1226#endif
1227 default:
1228 ret_val = -EPROTONOSUPPORT;
1229 }
1230
1231req_setattr_return:
1232 rcu_read_unlock();
1233 return ret_val;
1234}
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244void netlbl_req_delattr(struct request_sock *req)
1245{
1246 switch (req->rsk_ops->family) {
1247 case AF_INET:
1248 cipso_v4_req_delattr(req);
1249 break;
1250#if IS_ENABLED(CONFIG_IPV6)
1251 case AF_INET6:
1252 calipso_req_delattr(req);
1253 break;
1254#endif
1255 }
1256}
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269int netlbl_skbuff_setattr(struct sk_buff *skb,
1270 u16 family,
1271 const struct netlbl_lsm_secattr *secattr)
1272{
1273 int ret_val;
1274 struct iphdr *hdr4;
1275#if IS_ENABLED(CONFIG_IPV6)
1276 struct ipv6hdr *hdr6;
1277#endif
1278 struct netlbl_dommap_def *entry;
1279
1280 rcu_read_lock();
1281 switch (family) {
1282 case AF_INET:
1283 hdr4 = ip_hdr(skb);
1284 entry = netlbl_domhsh_getentry_af4(secattr->domain,
1285 hdr4->daddr);
1286 if (entry == NULL) {
1287 ret_val = -ENOENT;
1288 goto skbuff_setattr_return;
1289 }
1290 switch (entry->type) {
1291 case NETLBL_NLTYPE_CIPSOV4:
1292 ret_val = cipso_v4_skbuff_setattr(skb, entry->cipso,
1293 secattr);
1294 break;
1295 case NETLBL_NLTYPE_UNLABELED:
1296
1297
1298 ret_val = cipso_v4_skbuff_delattr(skb);
1299 break;
1300 default:
1301 ret_val = -ENOENT;
1302 }
1303 break;
1304#if IS_ENABLED(CONFIG_IPV6)
1305 case AF_INET6:
1306 hdr6 = ipv6_hdr(skb);
1307 entry = netlbl_domhsh_getentry_af6(secattr->domain,
1308 &hdr6->daddr);
1309 if (entry == NULL) {
1310 ret_val = -ENOENT;
1311 goto skbuff_setattr_return;
1312 }
1313 switch (entry->type) {
1314 case NETLBL_NLTYPE_CALIPSO:
1315 ret_val = calipso_skbuff_setattr(skb, entry->calipso,
1316 secattr);
1317 break;
1318 case NETLBL_NLTYPE_UNLABELED:
1319
1320
1321 ret_val = calipso_skbuff_delattr(skb);
1322 break;
1323 default:
1324 ret_val = -ENOENT;
1325 }
1326 break;
1327#endif
1328 default:
1329 ret_val = -EPROTONOSUPPORT;
1330 }
1331
1332skbuff_setattr_return:
1333 rcu_read_unlock();
1334 return ret_val;
1335}
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350int netlbl_skbuff_getattr(const struct sk_buff *skb,
1351 u16 family,
1352 struct netlbl_lsm_secattr *secattr)
1353{
1354 unsigned char *ptr;
1355
1356 switch (family) {
1357 case AF_INET:
1358 ptr = cipso_v4_optptr(skb);
1359 if (ptr && cipso_v4_getattr(ptr, secattr) == 0)
1360 return 0;
1361 break;
1362#if IS_ENABLED(CONFIG_IPV6)
1363 case AF_INET6:
1364 ptr = calipso_optptr(skb);
1365 if (ptr && calipso_getattr(ptr, secattr) == 0)
1366 return 0;
1367 break;
1368#endif
1369 }
1370
1371 return netlbl_unlabel_getattr(skb, family, secattr);
1372}
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387void netlbl_skbuff_err(struct sk_buff *skb, u16 family, int error, int gateway)
1388{
1389 switch (family) {
1390 case AF_INET:
1391 if (cipso_v4_optptr(skb))
1392 cipso_v4_error(skb, error, gateway);
1393 break;
1394 }
1395}
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406void netlbl_cache_invalidate(void)
1407{
1408 cipso_v4_cache_invalidate();
1409#if IS_ENABLED(CONFIG_IPV6)
1410 calipso_cache_invalidate();
1411#endif
1412}
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426int netlbl_cache_add(const struct sk_buff *skb, u16 family,
1427 const struct netlbl_lsm_secattr *secattr)
1428{
1429 unsigned char *ptr;
1430
1431 if ((secattr->flags & NETLBL_SECATTR_CACHE) == 0)
1432 return -ENOMSG;
1433
1434 switch (family) {
1435 case AF_INET:
1436 ptr = cipso_v4_optptr(skb);
1437 if (ptr)
1438 return cipso_v4_cache_add(ptr, secattr);
1439 break;
1440#if IS_ENABLED(CONFIG_IPV6)
1441 case AF_INET6:
1442 ptr = calipso_optptr(skb);
1443 if (ptr)
1444 return calipso_cache_add(ptr, secattr);
1445 break;
1446#endif
1447 }
1448 return -ENOMSG;
1449}
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467struct audit_buffer *netlbl_audit_start(int type,
1468 struct netlbl_audit *audit_info)
1469{
1470 return netlbl_audit_start_common(type, audit_info);
1471}
1472EXPORT_SYMBOL(netlbl_audit_start);
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485static int __init netlbl_init(void)
1486{
1487 int ret_val;
1488
1489 printk(KERN_INFO "NetLabel: Initializing\n");
1490 printk(KERN_INFO "NetLabel: domain hash size = %u\n",
1491 (1 << NETLBL_DOMHSH_BITSIZE));
1492 printk(KERN_INFO "NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO\n");
1493
1494 ret_val = netlbl_domhsh_init(NETLBL_DOMHSH_BITSIZE);
1495 if (ret_val != 0)
1496 goto init_failure;
1497
1498 ret_val = netlbl_unlabel_init(NETLBL_UNLHSH_BITSIZE);
1499 if (ret_val != 0)
1500 goto init_failure;
1501
1502 ret_val = netlbl_netlink_init();
1503 if (ret_val != 0)
1504 goto init_failure;
1505
1506 ret_val = netlbl_unlabel_defconf();
1507 if (ret_val != 0)
1508 goto init_failure;
1509 printk(KERN_INFO "NetLabel: unlabeled traffic allowed by default\n");
1510
1511 return 0;
1512
1513init_failure:
1514 panic("NetLabel: failed to initialize properly (%d)\n", ret_val);
1515}
1516
1517subsys_initcall(netlbl_init);
1518