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mac_net.c (165600) mac_net.c (168955)
1/*-
2 * Copyright (c) 1999-2002 Robert N. M. Watson
3 * Copyright (c) 2001 Ilmar S. Habibulin
4 * Copyright (c) 2001-2004 Networks Associates Technology, Inc.
5 * All rights reserved.
6 *
7 * This software was developed by Robert Watson and Ilmar Habibulin for the
8 * TrustedBSD Project.

--- 21 unchanged lines hidden (view full) ---

30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#include <sys/cdefs.h>
1/*-
2 * Copyright (c) 1999-2002 Robert N. M. Watson
3 * Copyright (c) 2001 Ilmar S. Habibulin
4 * Copyright (c) 2001-2004 Networks Associates Technology, Inc.
5 * All rights reserved.
6 *
7 * This software was developed by Robert Watson and Ilmar Habibulin for the
8 * TrustedBSD Project.

--- 21 unchanged lines hidden (view full) ---

30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#include <sys/cdefs.h>
38__FBSDID("$FreeBSD: head/sys/security/mac/mac_net.c 165600 2006-12-28 21:57:59Z rwatson $");
38__FBSDID("$FreeBSD: head/sys/security/mac/mac_net.c 168955 2007-04-22 19:55:56Z rwatson $");
39
40#include "opt_mac.h"
41
42#include <sys/param.h>
43#include <sys/kernel.h>
44#include <sys/lock.h>
45#include <sys/malloc.h>
46#include <sys/mutex.h>

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77/*
78 * Retrieve the label associated with an mbuf by searching for the tag.
79 * Depending on the value of mac_labelmbufs, it's possible that a label will
80 * not be present, in which case NULL is returned. Policies must handle the
81 * possibility of an mbuf not having label storage if they do not enforce
82 * early loading.
83 */
84struct label *
39
40#include "opt_mac.h"
41
42#include <sys/param.h>
43#include <sys/kernel.h>
44#include <sys/lock.h>
45#include <sys/malloc.h>
46#include <sys/mutex.h>

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77/*
78 * Retrieve the label associated with an mbuf by searching for the tag.
79 * Depending on the value of mac_labelmbufs, it's possible that a label will
80 * not be present, in which case NULL is returned. Policies must handle the
81 * possibility of an mbuf not having label storage if they do not enforce
82 * early loading.
83 */
84struct label *
85mac_mbuf_to_label(struct mbuf *mbuf)
85mac_mbuf_to_label(struct mbuf *m)
86{
87 struct m_tag *tag;
88 struct label *label;
89
86{
87 struct m_tag *tag;
88 struct label *label;
89
90 if (mbuf == NULL)
90 if (m == NULL)
91 return (NULL);
91 return (NULL);
92 tag = m_tag_find(mbuf, PACKET_TAG_MACLABEL, NULL);
92 tag = m_tag_find(m, PACKET_TAG_MACLABEL, NULL);
93 if (tag == NULL)
94 return (NULL);
95 label = (struct label *)(tag+1);
96 return (label);
97}
98
99static struct label *
100mac_bpfdesc_label_alloc(void)
101{
102 struct label *label;
103
104 label = mac_labelzone_alloc(M_WAITOK);
105 MAC_PERFORM(init_bpfdesc_label, label);
106 return (label);
107}
108
109void
93 if (tag == NULL)
94 return (NULL);
95 label = (struct label *)(tag+1);
96 return (label);
97}
98
99static struct label *
100mac_bpfdesc_label_alloc(void)
101{
102 struct label *label;
103
104 label = mac_labelzone_alloc(M_WAITOK);
105 MAC_PERFORM(init_bpfdesc_label, label);
106 return (label);
107}
108
109void
110mac_init_bpfdesc(struct bpf_d *bpf_d)
110mac_init_bpfdesc(struct bpf_d *d)
111{
112
111{
112
113 bpf_d->bd_label = mac_bpfdesc_label_alloc();
113 d->bd_label = mac_bpfdesc_label_alloc();
114}
115
116static struct label *
117mac_ifnet_label_alloc(void)
118{
119 struct label *label;
120
121 label = mac_labelzone_alloc(M_WAITOK);

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180mac_bpfdesc_label_free(struct label *label)
181{
182
183 MAC_PERFORM(destroy_bpfdesc_label, label);
184 mac_labelzone_free(label);
185}
186
187void
114}
115
116static struct label *
117mac_ifnet_label_alloc(void)
118{
119 struct label *label;
120
121 label = mac_labelzone_alloc(M_WAITOK);

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180mac_bpfdesc_label_free(struct label *label)
181{
182
183 MAC_PERFORM(destroy_bpfdesc_label, label);
184 mac_labelzone_free(label);
185}
186
187void
188mac_destroy_bpfdesc(struct bpf_d *bpf_d)
188mac_destroy_bpfdesc(struct bpf_d *d)
189{
190
189{
190
191 mac_bpfdesc_label_free(bpf_d->bd_label);
192 bpf_d->bd_label = NULL;
191 mac_bpfdesc_label_free(d->bd_label);
192 d->bd_label = NULL;
193}
194
195static void
196mac_ifnet_label_free(struct label *label)
197{
198
199 MAC_PERFORM(destroy_ifnet_label, label);
200 mac_labelzone_free(label);

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273 int error;
274
275 MAC_INTERNALIZE(ifnet, label, string);
276
277 return (error);
278}
279
280void
193}
194
195static void
196mac_ifnet_label_free(struct label *label)
197{
198
199 MAC_PERFORM(destroy_ifnet_label, label);
200 mac_labelzone_free(label);

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273 int error;
274
275 MAC_INTERNALIZE(ifnet, label, string);
276
277 return (error);
278}
279
280void
281mac_create_ifnet(struct ifnet *ifnet)
281mac_create_ifnet(struct ifnet *ifp)
282{
283
282{
283
284 MAC_IFNET_LOCK(ifnet);
285 MAC_PERFORM(create_ifnet, ifnet, ifnet->if_label);
286 MAC_IFNET_UNLOCK(ifnet);
284 MAC_IFNET_LOCK(ifp);
285 MAC_PERFORM(create_ifnet, ifp, ifp->if_label);
286 MAC_IFNET_UNLOCK(ifp);
287}
288
289void
287}
288
289void
290mac_create_bpfdesc(struct ucred *cred, struct bpf_d *bpf_d)
290mac_create_bpfdesc(struct ucred *cred, struct bpf_d *d)
291{
292
291{
292
293 MAC_PERFORM(create_bpfdesc, cred, bpf_d, bpf_d->bd_label);
293 MAC_PERFORM(create_bpfdesc, cred, d, d->bd_label);
294}
295
296void
294}
295
296void
297mac_create_mbuf_from_bpfdesc(struct bpf_d *bpf_d, struct mbuf *mbuf)
297mac_create_mbuf_from_bpfdesc(struct bpf_d *d, struct mbuf *m)
298{
299 struct label *label;
300
298{
299 struct label *label;
300
301 BPFD_LOCK_ASSERT(bpf_d);
301 BPFD_LOCK_ASSERT(d);
302
302
303 label = mac_mbuf_to_label(mbuf);
303 label = mac_mbuf_to_label(m);
304
304
305 MAC_PERFORM(create_mbuf_from_bpfdesc, bpf_d, bpf_d->bd_label, mbuf,
306 label);
305 MAC_PERFORM(create_mbuf_from_bpfdesc, d, d->bd_label, m, label);
307}
308
309void
306}
307
308void
310mac_create_mbuf_linklayer(struct ifnet *ifnet, struct mbuf *mbuf)
309mac_create_mbuf_linklayer(struct ifnet *ifp, struct mbuf *m)
311{
312 struct label *label;
313
310{
311 struct label *label;
312
314 label = mac_mbuf_to_label(mbuf);
313 label = mac_mbuf_to_label(m);
315
314
316 MAC_IFNET_LOCK(ifnet);
317 MAC_PERFORM(create_mbuf_linklayer, ifnet, ifnet->if_label, mbuf,
318 label);
319 MAC_IFNET_UNLOCK(ifnet);
315 MAC_IFNET_LOCK(ifp);
316 MAC_PERFORM(create_mbuf_linklayer, ifp, ifp->if_label, m, label);
317 MAC_IFNET_UNLOCK(ifp);
320}
321
322void
318}
319
320void
323mac_create_mbuf_from_ifnet(struct ifnet *ifnet, struct mbuf *mbuf)
321mac_create_mbuf_from_ifnet(struct ifnet *ifp, struct mbuf *m)
324{
325 struct label *label;
326
322{
323 struct label *label;
324
327 label = mac_mbuf_to_label(mbuf);
325 label = mac_mbuf_to_label(m);
328
326
329 MAC_IFNET_LOCK(ifnet);
330 MAC_PERFORM(create_mbuf_from_ifnet, ifnet, ifnet->if_label, mbuf,
331 label);
332 MAC_IFNET_UNLOCK(ifnet);
327 MAC_IFNET_LOCK(ifp);
328 MAC_PERFORM(create_mbuf_from_ifnet, ifp, ifp->if_label, m, label);
329 MAC_IFNET_UNLOCK(ifp);
333}
334
335void
330}
331
332void
336mac_create_mbuf_multicast_encap(struct mbuf *oldmbuf, struct ifnet *ifnet,
337 struct mbuf *newmbuf)
333mac_create_mbuf_multicast_encap(struct mbuf *m, struct ifnet *ifp,
334 struct mbuf *mnew)
338{
335{
339 struct label *oldmbuflabel, *newmbuflabel;
336 struct label *mlabel, *mnewlabel;
340
337
341 oldmbuflabel = mac_mbuf_to_label(oldmbuf);
342 newmbuflabel = mac_mbuf_to_label(newmbuf);
338 mlabel = mac_mbuf_to_label(m);
339 mnewlabel = mac_mbuf_to_label(mnew);
343
340
344 MAC_IFNET_LOCK(ifnet);
345 MAC_PERFORM(create_mbuf_multicast_encap, oldmbuf, oldmbuflabel,
346 ifnet, ifnet->if_label, newmbuf, newmbuflabel);
347 MAC_IFNET_UNLOCK(ifnet);
341 MAC_IFNET_LOCK(ifp);
342 MAC_PERFORM(create_mbuf_multicast_encap, m, mlabel, ifp,
343 ifp->if_label, mnew, mnewlabel);
344 MAC_IFNET_UNLOCK(ifp);
348}
349
350void
345}
346
347void
351mac_create_mbuf_netlayer(struct mbuf *oldmbuf, struct mbuf *newmbuf)
348mac_create_mbuf_netlayer(struct mbuf *m, struct mbuf *mnew)
352{
349{
353 struct label *oldmbuflabel, *newmbuflabel;
350 struct label *mlabel, *mnewlabel;
354
351
355 oldmbuflabel = mac_mbuf_to_label(oldmbuf);
356 newmbuflabel = mac_mbuf_to_label(newmbuf);
352 mlabel = mac_mbuf_to_label(m);
353 mnewlabel = mac_mbuf_to_label(mnew);
357
354
358 MAC_PERFORM(create_mbuf_netlayer, oldmbuf, oldmbuflabel, newmbuf,
359 newmbuflabel);
355 MAC_PERFORM(create_mbuf_netlayer, m, mlabel, mnew, mnewlabel);
360}
361
362int
356}
357
358int
363mac_check_bpfdesc_receive(struct bpf_d *bpf_d, struct ifnet *ifnet)
359mac_check_bpfdesc_receive(struct bpf_d *d, struct ifnet *ifp)
364{
365 int error;
366
360{
361 int error;
362
367 BPFD_LOCK_ASSERT(bpf_d);
363 BPFD_LOCK_ASSERT(d);
368
364
369 MAC_IFNET_LOCK(ifnet);
370 MAC_CHECK(check_bpfdesc_receive, bpf_d, bpf_d->bd_label, ifnet,
371 ifnet->if_label);
372 MAC_IFNET_UNLOCK(ifnet);
365 MAC_IFNET_LOCK(ifp);
366 MAC_CHECK(check_bpfdesc_receive, d, d->bd_label, ifp, ifp->if_label);
367 MAC_IFNET_UNLOCK(ifp);
373
374 return (error);
375}
376
377int
368
369 return (error);
370}
371
372int
378mac_check_ifnet_transmit(struct ifnet *ifnet, struct mbuf *mbuf)
373mac_check_ifnet_transmit(struct ifnet *ifp, struct mbuf *m)
379{
380 struct label *label;
381 int error;
382
374{
375 struct label *label;
376 int error;
377
383 M_ASSERTPKTHDR(mbuf);
378 M_ASSERTPKTHDR(m);
384
379
385 label = mac_mbuf_to_label(mbuf);
380 label = mac_mbuf_to_label(m);
386
381
387 MAC_IFNET_LOCK(ifnet);
388 MAC_CHECK(check_ifnet_transmit, ifnet, ifnet->if_label, mbuf,
389 label);
390 MAC_IFNET_UNLOCK(ifnet);
382 MAC_IFNET_LOCK(ifp);
383 MAC_CHECK(check_ifnet_transmit, ifp, ifp->if_label, m, label);
384 MAC_IFNET_UNLOCK(ifp);
391
392 return (error);
393}
394
395int
396mac_ioctl_ifnet_get(struct ucred *cred, struct ifreq *ifr,
385
386 return (error);
387}
388
389int
390mac_ioctl_ifnet_get(struct ucred *cred, struct ifreq *ifr,
397 struct ifnet *ifnet)
391 struct ifnet *ifp)
398{
399 char *elements, *buffer;
400 struct label *intlabel;
401 struct mac mac;
402 int error;
403
404 error = copyin(ifr->ifr_ifru.ifru_data, &mac, sizeof(mac));
405 if (error)

--- 7 unchanged lines hidden (view full) ---

413 error = copyinstr(mac.m_string, elements, mac.m_buflen, NULL);
414 if (error) {
415 free(elements, M_MACTEMP);
416 return (error);
417 }
418
419 buffer = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK | M_ZERO);
420 intlabel = mac_ifnet_label_alloc();
392{
393 char *elements, *buffer;
394 struct label *intlabel;
395 struct mac mac;
396 int error;
397
398 error = copyin(ifr->ifr_ifru.ifru_data, &mac, sizeof(mac));
399 if (error)

--- 7 unchanged lines hidden (view full) ---

407 error = copyinstr(mac.m_string, elements, mac.m_buflen, NULL);
408 if (error) {
409 free(elements, M_MACTEMP);
410 return (error);
411 }
412
413 buffer = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK | M_ZERO);
414 intlabel = mac_ifnet_label_alloc();
421 MAC_IFNET_LOCK(ifnet);
422 mac_copy_ifnet_label(ifnet->if_label, intlabel);
423 MAC_IFNET_UNLOCK(ifnet);
415 MAC_IFNET_LOCK(ifp);
416 mac_copy_ifnet_label(ifp->if_label, intlabel);
417 MAC_IFNET_UNLOCK(ifp);
424 error = mac_externalize_ifnet_label(intlabel, elements, buffer,
425 mac.m_buflen);
426 mac_ifnet_label_free(intlabel);
427 if (error == 0)
428 error = copyout(buffer, mac.m_string, strlen(buffer)+1);
429
430 free(buffer, M_MACTEMP);
431 free(elements, M_MACTEMP);
432
433 return (error);
434}
435
436int
418 error = mac_externalize_ifnet_label(intlabel, elements, buffer,
419 mac.m_buflen);
420 mac_ifnet_label_free(intlabel);
421 if (error == 0)
422 error = copyout(buffer, mac.m_string, strlen(buffer)+1);
423
424 free(buffer, M_MACTEMP);
425 free(elements, M_MACTEMP);
426
427 return (error);
428}
429
430int
437mac_ioctl_ifnet_set(struct ucred *cred, struct ifreq *ifr,
438 struct ifnet *ifnet)
431mac_ioctl_ifnet_set(struct ucred *cred, struct ifreq *ifr, struct ifnet *ifp)
439{
440 struct label *intlabel;
441 struct mac mac;
442 char *buffer;
443 int error;
444
445 error = copyin(ifr->ifr_ifru.ifru_data, &mac, sizeof(mac));
446 if (error)

--- 24 unchanged lines hidden (view full) ---

471 * Eventually, this should go away.
472 */
473 error = priv_check_cred(cred, PRIV_NET_SETIFMAC, 0);
474 if (error) {
475 mac_ifnet_label_free(intlabel);
476 return (error);
477 }
478
432{
433 struct label *intlabel;
434 struct mac mac;
435 char *buffer;
436 int error;
437
438 error = copyin(ifr->ifr_ifru.ifru_data, &mac, sizeof(mac));
439 if (error)

--- 24 unchanged lines hidden (view full) ---

464 * Eventually, this should go away.
465 */
466 error = priv_check_cred(cred, PRIV_NET_SETIFMAC, 0);
467 if (error) {
468 mac_ifnet_label_free(intlabel);
469 return (error);
470 }
471
479 MAC_IFNET_LOCK(ifnet);
480 MAC_CHECK(check_ifnet_relabel, cred, ifnet, ifnet->if_label,
481 intlabel);
472 MAC_IFNET_LOCK(ifp);
473 MAC_CHECK(check_ifnet_relabel, cred, ifp, ifp->if_label, intlabel);
482 if (error) {
474 if (error) {
483 MAC_IFNET_UNLOCK(ifnet);
475 MAC_IFNET_UNLOCK(ifp);
484 mac_ifnet_label_free(intlabel);
485 return (error);
486 }
487
476 mac_ifnet_label_free(intlabel);
477 return (error);
478 }
479
488 MAC_PERFORM(relabel_ifnet, cred, ifnet, ifnet->if_label, intlabel);
489 MAC_IFNET_UNLOCK(ifnet);
480 MAC_PERFORM(relabel_ifnet, cred, ifp, ifp->if_label, intlabel);
481 MAC_IFNET_UNLOCK(ifp);
490
491 mac_ifnet_label_free(intlabel);
492 return (0);
493}
482
483 mac_ifnet_label_free(intlabel);
484 return (0);
485}