1/*-
2 * Copyright (c) 1999-2002, 2009 Robert N. M. Watson
3 * Copyright (c) 2001 Ilmar S. Habibulin
4 * Copyright (c) 2001-2004 Networks Associates Technology, Inc.
5 * Copyright (c) 2006 SPARTA, Inc.
6 * Copyright (c) 2008 Apple Inc.
7 * All rights reserved.
8 *
9 * This software was developed by Robert Watson and Ilmar Habibulin for the
10 * TrustedBSD Project.
11 *
12 * This software was enhanced by SPARTA ISSO under SPAWAR contract
13 * N66001-04-C-6019 ("SEFOS").
14 *
15 * This software was developed for the FreeBSD Project in part by Network
16 * Associates Laboratories, the Security Research Division of Network
17 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
18 * as part of the DARPA CHATS research program.
19 *
20 * This software was developed at the University of Cambridge Computer
21 * Laboratory with support from a grant from Google, Inc.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the above copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 *
32 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
35 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 * SUCH DAMAGE.
43 */
44
45#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 1999-2002, 2009 Robert N. M. Watson
3 * Copyright (c) 2001 Ilmar S. Habibulin
4 * Copyright (c) 2001-2004 Networks Associates Technology, Inc.
5 * Copyright (c) 2006 SPARTA, Inc.
6 * Copyright (c) 2008 Apple Inc.
7 * All rights reserved.
8 *
9 * This software was developed by Robert Watson and Ilmar Habibulin for the
10 * TrustedBSD Project.
11 *
12 * This software was enhanced by SPARTA ISSO under SPAWAR contract
13 * N66001-04-C-6019 ("SEFOS").
14 *
15 * This software was developed for the FreeBSD Project in part by Network
16 * Associates Laboratories, the Security Research Division of Network
17 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
18 * as part of the DARPA CHATS research program.
19 *
20 * This software was developed at the University of Cambridge Computer
21 * Laboratory with support from a grant from Google, Inc.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the above copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 *
32 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
35 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 * SUCH DAMAGE.
43 */
44
45#include <sys/cdefs.h>
|
46__FBSDID("$FreeBSD: head/sys/security/mac/mac_net.c 189797 2009-03-14 16:06:06Z rwatson $");
| 46__FBSDID("$FreeBSD: head/sys/security/mac/mac_net.c 191731 2009-05-01 21:05:40Z rwatson $");
|
47
48#include "opt_kdtrace.h"
49#include "opt_mac.h"
50
51#include <sys/param.h>
52#include <sys/kernel.h>
53#include <sys/lock.h>
54#include <sys/malloc.h>
55#include <sys/mutex.h>
56#include <sys/mac.h>
57#include <sys/priv.h>
58#include <sys/sbuf.h>
59#include <sys/sdt.h>
60#include <sys/systm.h>
61#include <sys/mount.h>
62#include <sys/file.h>
63#include <sys/namei.h>
64#include <sys/protosw.h>
65#include <sys/socket.h>
66#include <sys/socketvar.h>
67#include <sys/sysctl.h>
68
69#include <net/bpfdesc.h>
70#include <net/if.h>
71#include <net/if_var.h>
72
73#include <security/mac/mac_framework.h>
74#include <security/mac/mac_internal.h>
75#include <security/mac/mac_policy.h>
76
77/*
78 * XXXRW: struct ifnet locking is incomplete in the network code, so we use
79 * our own global mutex for struct ifnet. Non-ideal, but should help in the
80 * SMP environment.
81 */
82struct mtx mac_ifnet_mtx;
83MTX_SYSINIT(mac_ifnet_mtx, &mac_ifnet_mtx, "mac_ifnet", MTX_DEF);
84
85/*
86 * Retrieve the label associated with an mbuf by searching for the tag.
87 * Depending on the value of mac_labelmbufs, it's possible that a label will
88 * not be present, in which case NULL is returned. Policies must handle the
89 * possibility of an mbuf not having label storage if they do not enforce
90 * early loading.
91 */
92struct label *
93mac_mbuf_to_label(struct mbuf *m)
94{
95 struct m_tag *tag;
96 struct label *label;
97
98 if (m == NULL)
99 return (NULL);
100 tag = m_tag_find(m, PACKET_TAG_MACLABEL, NULL);
101 if (tag == NULL)
102 return (NULL);
103 label = (struct label *)(tag+1);
104 return (label);
105}
106
107static struct label *
108mac_bpfdesc_label_alloc(void)
109{
110 struct label *label;
111
112 label = mac_labelzone_alloc(M_WAITOK);
| 47
48#include "opt_kdtrace.h"
49#include "opt_mac.h"
50
51#include <sys/param.h>
52#include <sys/kernel.h>
53#include <sys/lock.h>
54#include <sys/malloc.h>
55#include <sys/mutex.h>
56#include <sys/mac.h>
57#include <sys/priv.h>
58#include <sys/sbuf.h>
59#include <sys/sdt.h>
60#include <sys/systm.h>
61#include <sys/mount.h>
62#include <sys/file.h>
63#include <sys/namei.h>
64#include <sys/protosw.h>
65#include <sys/socket.h>
66#include <sys/socketvar.h>
67#include <sys/sysctl.h>
68
69#include <net/bpfdesc.h>
70#include <net/if.h>
71#include <net/if_var.h>
72
73#include <security/mac/mac_framework.h>
74#include <security/mac/mac_internal.h>
75#include <security/mac/mac_policy.h>
76
77/*
78 * XXXRW: struct ifnet locking is incomplete in the network code, so we use
79 * our own global mutex for struct ifnet. Non-ideal, but should help in the
80 * SMP environment.
81 */
82struct mtx mac_ifnet_mtx;
83MTX_SYSINIT(mac_ifnet_mtx, &mac_ifnet_mtx, "mac_ifnet", MTX_DEF);
84
85/*
86 * Retrieve the label associated with an mbuf by searching for the tag.
87 * Depending on the value of mac_labelmbufs, it's possible that a label will
88 * not be present, in which case NULL is returned. Policies must handle the
89 * possibility of an mbuf not having label storage if they do not enforce
90 * early loading.
91 */
92struct label *
93mac_mbuf_to_label(struct mbuf *m)
94{
95 struct m_tag *tag;
96 struct label *label;
97
98 if (m == NULL)
99 return (NULL);
100 tag = m_tag_find(m, PACKET_TAG_MACLABEL, NULL);
101 if (tag == NULL)
102 return (NULL);
103 label = (struct label *)(tag+1);
104 return (label);
105}
106
107static struct label *
108mac_bpfdesc_label_alloc(void)
109{
110 struct label *label;
111
112 label = mac_labelzone_alloc(M_WAITOK);
|
113 MAC_PERFORM(bpfdesc_init_label, label);
| 113 MAC_POLICY_PERFORM(bpfdesc_init_label, label);
|
114 return (label);
115}
116
117void
118mac_bpfdesc_init(struct bpf_d *d)
119{
120
121 if (mac_labeled & MPC_OBJECT_BPFDESC)
122 d->bd_label = mac_bpfdesc_label_alloc();
123 else
124 d->bd_label = NULL;
125}
126
127static struct label *
128mac_ifnet_label_alloc(void)
129{
130 struct label *label;
131
132 label = mac_labelzone_alloc(M_WAITOK);
| 114 return (label);
115}
116
117void
118mac_bpfdesc_init(struct bpf_d *d)
119{
120
121 if (mac_labeled & MPC_OBJECT_BPFDESC)
122 d->bd_label = mac_bpfdesc_label_alloc();
123 else
124 d->bd_label = NULL;
125}
126
127static struct label *
128mac_ifnet_label_alloc(void)
129{
130 struct label *label;
131
132 label = mac_labelzone_alloc(M_WAITOK);
|
133 MAC_PERFORM(ifnet_init_label, label);
| 133 MAC_POLICY_PERFORM(ifnet_init_label, label);
|
134 return (label);
135}
136
137void
138mac_ifnet_init(struct ifnet *ifp)
139{
140
141 if (mac_labeled & MPC_OBJECT_IFNET)
142 ifp->if_label = mac_ifnet_label_alloc();
143 else
144 ifp->if_label = NULL;
145}
146
147int
148mac_mbuf_tag_init(struct m_tag *tag, int flag)
149{
150 struct label *label;
151 int error;
152
153 label = (struct label *) (tag + 1);
154 mac_init_label(label);
155
156 if (flag & M_WAITOK)
| 134 return (label);
135}
136
137void
138mac_ifnet_init(struct ifnet *ifp)
139{
140
141 if (mac_labeled & MPC_OBJECT_IFNET)
142 ifp->if_label = mac_ifnet_label_alloc();
143 else
144 ifp->if_label = NULL;
145}
146
147int
148mac_mbuf_tag_init(struct m_tag *tag, int flag)
149{
150 struct label *label;
151 int error;
152
153 label = (struct label *) (tag + 1);
154 mac_init_label(label);
155
156 if (flag & M_WAITOK)
|
157 MAC_CHECK(mbuf_init_label, label, flag);
| 157 MAC_POLICY_CHECK(mbuf_init_label, label, flag);
|
158 else
| 158 else
|
159 MAC_CHECK_NOSLEEP(mbuf_init_label, label, flag);
| 159 MAC_POLICY_CHECK_NOSLEEP(mbuf_init_label, label, flag);
|
160 if (error) {
| 160 if (error) {
|
161 MAC_PERFORM_NOSLEEP(mbuf_destroy_label, label);
| 161 MAC_POLICY_PERFORM_NOSLEEP(mbuf_destroy_label, label);
|
162 mac_destroy_label(label);
163 }
164 return (error);
165}
166
167int
168mac_mbuf_init(struct mbuf *m, int flag)
169{
170 struct m_tag *tag;
171 int error;
172
173 M_ASSERTPKTHDR(m);
174
175 if (mac_labeled & MPC_OBJECT_MBUF) {
176 tag = m_tag_get(PACKET_TAG_MACLABEL, sizeof(struct label),
177 flag);
178 if (tag == NULL)
179 return (ENOMEM);
180 error = mac_mbuf_tag_init(tag, flag);
181 if (error) {
182 m_tag_free(tag);
183 return (error);
184 }
185 m_tag_prepend(m, tag);
186 }
187 return (0);
188}
189
190static void
191mac_bpfdesc_label_free(struct label *label)
192{
193
| 162 mac_destroy_label(label);
163 }
164 return (error);
165}
166
167int
168mac_mbuf_init(struct mbuf *m, int flag)
169{
170 struct m_tag *tag;
171 int error;
172
173 M_ASSERTPKTHDR(m);
174
175 if (mac_labeled & MPC_OBJECT_MBUF) {
176 tag = m_tag_get(PACKET_TAG_MACLABEL, sizeof(struct label),
177 flag);
178 if (tag == NULL)
179 return (ENOMEM);
180 error = mac_mbuf_tag_init(tag, flag);
181 if (error) {
182 m_tag_free(tag);
183 return (error);
184 }
185 m_tag_prepend(m, tag);
186 }
187 return (0);
188}
189
190static void
191mac_bpfdesc_label_free(struct label *label)
192{
193
|
194 MAC_PERFORM_NOSLEEP(bpfdesc_destroy_label, label);
| 194 MAC_POLICY_PERFORM_NOSLEEP(bpfdesc_destroy_label, label);
|
195 mac_labelzone_free(label);
196}
197
198void
199mac_bpfdesc_destroy(struct bpf_d *d)
200{
201
202 if (d->bd_label != NULL) {
203 mac_bpfdesc_label_free(d->bd_label);
204 d->bd_label = NULL;
205 }
206}
207
208static void
209mac_ifnet_label_free(struct label *label)
210{
211
| 195 mac_labelzone_free(label);
196}
197
198void
199mac_bpfdesc_destroy(struct bpf_d *d)
200{
201
202 if (d->bd_label != NULL) {
203 mac_bpfdesc_label_free(d->bd_label);
204 d->bd_label = NULL;
205 }
206}
207
208static void
209mac_ifnet_label_free(struct label *label)
210{
211
|
212 MAC_PERFORM_NOSLEEP(ifnet_destroy_label, label);
| 212 MAC_POLICY_PERFORM_NOSLEEP(ifnet_destroy_label, label);
|
213 mac_labelzone_free(label);
214}
215
216void
217mac_ifnet_destroy(struct ifnet *ifp)
218{
219
220 if (ifp->if_label != NULL) {
221 mac_ifnet_label_free(ifp->if_label);
222 ifp->if_label = NULL;
223 }
224}
225
226void
227mac_mbuf_tag_destroy(struct m_tag *tag)
228{
229 struct label *label;
230
231 label = (struct label *)(tag+1);
232
| 213 mac_labelzone_free(label);
214}
215
216void
217mac_ifnet_destroy(struct ifnet *ifp)
218{
219
220 if (ifp->if_label != NULL) {
221 mac_ifnet_label_free(ifp->if_label);
222 ifp->if_label = NULL;
223 }
224}
225
226void
227mac_mbuf_tag_destroy(struct m_tag *tag)
228{
229 struct label *label;
230
231 label = (struct label *)(tag+1);
232
|
233 MAC_PERFORM_NOSLEEP(mbuf_destroy_label, label);
| 233 MAC_POLICY_PERFORM_NOSLEEP(mbuf_destroy_label, label);
|
234 mac_destroy_label(label);
235}
236
237/*
238 * mac_mbuf_tag_copy is called when an mbuf header is duplicated, in which
239 * case the labels must also be duplicated.
240 */
241void
242mac_mbuf_tag_copy(struct m_tag *src, struct m_tag *dest)
243{
244 struct label *src_label, *dest_label;
245
246 src_label = (struct label *)(src+1);
247 dest_label = (struct label *)(dest+1);
248
249 /*
250 * mac_mbuf_tag_init() is called on the target tag in m_tag_copy(),
251 * so we don't need to call it here.
252 */
| 234 mac_destroy_label(label);
235}
236
237/*
238 * mac_mbuf_tag_copy is called when an mbuf header is duplicated, in which
239 * case the labels must also be duplicated.
240 */
241void
242mac_mbuf_tag_copy(struct m_tag *src, struct m_tag *dest)
243{
244 struct label *src_label, *dest_label;
245
246 src_label = (struct label *)(src+1);
247 dest_label = (struct label *)(dest+1);
248
249 /*
250 * mac_mbuf_tag_init() is called on the target tag in m_tag_copy(),
251 * so we don't need to call it here.
252 */
|
253 MAC_PERFORM_NOSLEEP(mbuf_copy_label, src_label, dest_label);
| 253 MAC_POLICY_PERFORM_NOSLEEP(mbuf_copy_label, src_label, dest_label);
|
254}
255
256void
257mac_mbuf_copy(struct mbuf *m_from, struct mbuf *m_to)
258{
259 struct label *src_label, *dest_label;
260
261 src_label = mac_mbuf_to_label(m_from);
262 dest_label = mac_mbuf_to_label(m_to);
263
| 254}
255
256void
257mac_mbuf_copy(struct mbuf *m_from, struct mbuf *m_to)
258{
259 struct label *src_label, *dest_label;
260
261 src_label = mac_mbuf_to_label(m_from);
262 dest_label = mac_mbuf_to_label(m_to);
263
|
264 MAC_PERFORM_NOSLEEP(mbuf_copy_label, src_label, dest_label);
| 264 MAC_POLICY_PERFORM_NOSLEEP(mbuf_copy_label, src_label, dest_label);
|
265}
266
267static void
268mac_ifnet_copy_label(struct label *src, struct label *dest)
269{
270
| 265}
266
267static void
268mac_ifnet_copy_label(struct label *src, struct label *dest)
269{
270
|
271 MAC_PERFORM_NOSLEEP(ifnet_copy_label, src, dest);
| 271 MAC_POLICY_PERFORM_NOSLEEP(ifnet_copy_label, src, dest);
|
272}
273
274static int
275mac_ifnet_externalize_label(struct label *label, char *elements,
276 char *outbuf, size_t outbuflen)
277{
278 int error;
279
| 272}
273
274static int
275mac_ifnet_externalize_label(struct label *label, char *elements,
276 char *outbuf, size_t outbuflen)
277{
278 int error;
279
|
280 MAC_EXTERNALIZE(ifnet, label, elements, outbuf, outbuflen);
| 280 MAC_POLICY_EXTERNALIZE(ifnet, label, elements, outbuf, outbuflen);
|
281
282 return (error);
283}
284
285static int
286mac_ifnet_internalize_label(struct label *label, char *string)
287{
288 int error;
289
| 281
282 return (error);
283}
284
285static int
286mac_ifnet_internalize_label(struct label *label, char *string)
287{
288 int error;
289
|
290 MAC_INTERNALIZE(ifnet, label, string);
| 290 MAC_POLICY_INTERNALIZE(ifnet, label, string);
|
291
292 return (error);
293}
294
295void
296mac_ifnet_create(struct ifnet *ifp)
297{
298
299 MAC_IFNET_LOCK(ifp);
| 291
292 return (error);
293}
294
295void
296mac_ifnet_create(struct ifnet *ifp)
297{
298
299 MAC_IFNET_LOCK(ifp);
|
300 MAC_PERFORM_NOSLEEP(ifnet_create, ifp, ifp->if_label);
| 300 MAC_POLICY_PERFORM_NOSLEEP(ifnet_create, ifp, ifp->if_label);
|
301 MAC_IFNET_UNLOCK(ifp);
302}
303
304void
305mac_bpfdesc_create(struct ucred *cred, struct bpf_d *d)
306{
307
| 301 MAC_IFNET_UNLOCK(ifp);
302}
303
304void
305mac_bpfdesc_create(struct ucred *cred, struct bpf_d *d)
306{
307
|
308 MAC_PERFORM_NOSLEEP(bpfdesc_create, cred, d, d->bd_label);
| 308 MAC_POLICY_PERFORM_NOSLEEP(bpfdesc_create, cred, d, d->bd_label);
|
309}
310
311void
312mac_bpfdesc_create_mbuf(struct bpf_d *d, struct mbuf *m)
313{
314 struct label *label;
315
316 BPFD_LOCK_ASSERT(d);
317
318 label = mac_mbuf_to_label(m);
319
| 309}
310
311void
312mac_bpfdesc_create_mbuf(struct bpf_d *d, struct mbuf *m)
313{
314 struct label *label;
315
316 BPFD_LOCK_ASSERT(d);
317
318 label = mac_mbuf_to_label(m);
319
|
320 MAC_PERFORM_NOSLEEP(bpfdesc_create_mbuf, d, d->bd_label, m, label);
| 320 MAC_POLICY_PERFORM_NOSLEEP(bpfdesc_create_mbuf, d, d->bd_label, m,
321 label);
|
321}
322
323void
324mac_ifnet_create_mbuf(struct ifnet *ifp, struct mbuf *m)
325{
326 struct label *label;
327
328 label = mac_mbuf_to_label(m);
329
330 MAC_IFNET_LOCK(ifp);
| 322}
323
324void
325mac_ifnet_create_mbuf(struct ifnet *ifp, struct mbuf *m)
326{
327 struct label *label;
328
329 label = mac_mbuf_to_label(m);
330
331 MAC_IFNET_LOCK(ifp);
|
331 MAC_PERFORM_NOSLEEP(ifnet_create_mbuf, ifp, ifp->if_label, m, label);
| 332 MAC_POLICY_PERFORM_NOSLEEP(ifnet_create_mbuf, ifp, ifp->if_label, m,
333 label);
|
332 MAC_IFNET_UNLOCK(ifp);
333}
334
335MAC_CHECK_PROBE_DEFINE2(bpfdesc_check_receive, "struct bpf_d *",
336 "struct ifnet *");
337
338int
339mac_bpfdesc_check_receive(struct bpf_d *d, struct ifnet *ifp)
340{
341 int error;
342
343 BPFD_LOCK_ASSERT(d);
344
345 MAC_IFNET_LOCK(ifp);
| 334 MAC_IFNET_UNLOCK(ifp);
335}
336
337MAC_CHECK_PROBE_DEFINE2(bpfdesc_check_receive, "struct bpf_d *",
338 "struct ifnet *");
339
340int
341mac_bpfdesc_check_receive(struct bpf_d *d, struct ifnet *ifp)
342{
343 int error;
344
345 BPFD_LOCK_ASSERT(d);
346
347 MAC_IFNET_LOCK(ifp);
|
346 MAC_CHECK_NOSLEEP(bpfdesc_check_receive, d, d->bd_label, ifp,
| 348 MAC_POLICY_CHECK_NOSLEEP(bpfdesc_check_receive, d, d->bd_label, ifp,
|
347 ifp->if_label);
348 MAC_CHECK_PROBE2(bpfdesc_check_receive, error, d, ifp);
349 MAC_IFNET_UNLOCK(ifp);
350
351 return (error);
352}
353
354MAC_CHECK_PROBE_DEFINE2(ifnet_check_transmit, "struct ifnet *",
355 "struct mbuf *");
356
357int
358mac_ifnet_check_transmit(struct ifnet *ifp, struct mbuf *m)
359{
360 struct label *label;
361 int error;
362
363 M_ASSERTPKTHDR(m);
364
365 label = mac_mbuf_to_label(m);
366
367 MAC_IFNET_LOCK(ifp);
| 349 ifp->if_label);
350 MAC_CHECK_PROBE2(bpfdesc_check_receive, error, d, ifp);
351 MAC_IFNET_UNLOCK(ifp);
352
353 return (error);
354}
355
356MAC_CHECK_PROBE_DEFINE2(ifnet_check_transmit, "struct ifnet *",
357 "struct mbuf *");
358
359int
360mac_ifnet_check_transmit(struct ifnet *ifp, struct mbuf *m)
361{
362 struct label *label;
363 int error;
364
365 M_ASSERTPKTHDR(m);
366
367 label = mac_mbuf_to_label(m);
368
369 MAC_IFNET_LOCK(ifp);
|
368 MAC_CHECK_NOSLEEP(ifnet_check_transmit, ifp, ifp->if_label, m,
| 370 MAC_POLICY_CHECK_NOSLEEP(ifnet_check_transmit, ifp, ifp->if_label, m,
|
369 label);
370 MAC_CHECK_PROBE2(ifnet_check_transmit, error, ifp, m);
371 MAC_IFNET_UNLOCK(ifp);
372
373 return (error);
374}
375
376int
377mac_ifnet_ioctl_get(struct ucred *cred, struct ifreq *ifr,
378 struct ifnet *ifp)
379{
380 char *elements, *buffer;
381 struct label *intlabel;
382 struct mac mac;
383 int error;
384
385 if (!(mac_labeled & MPC_OBJECT_IFNET))
386 return (EINVAL);
387
388 error = copyin(ifr->ifr_ifru.ifru_data, &mac, sizeof(mac));
389 if (error)
390 return (error);
391
392 error = mac_check_structmac_consistent(&mac);
393 if (error)
394 return (error);
395
396 elements = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK);
397 error = copyinstr(mac.m_string, elements, mac.m_buflen, NULL);
398 if (error) {
399 free(elements, M_MACTEMP);
400 return (error);
401 }
402
403 buffer = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK | M_ZERO);
404 intlabel = mac_ifnet_label_alloc();
405 MAC_IFNET_LOCK(ifp);
406 mac_ifnet_copy_label(ifp->if_label, intlabel);
407 MAC_IFNET_UNLOCK(ifp);
408 error = mac_ifnet_externalize_label(intlabel, elements, buffer,
409 mac.m_buflen);
410 mac_ifnet_label_free(intlabel);
411 if (error == 0)
412 error = copyout(buffer, mac.m_string, strlen(buffer)+1);
413
414 free(buffer, M_MACTEMP);
415 free(elements, M_MACTEMP);
416
417 return (error);
418}
419
420int
421mac_ifnet_ioctl_set(struct ucred *cred, struct ifreq *ifr, struct ifnet *ifp)
422{
423 struct label *intlabel;
424 struct mac mac;
425 char *buffer;
426 int error;
427
428 if (!(mac_labeled & MPC_OBJECT_IFNET))
429 return (EINVAL);
430
431 error = copyin(ifr->ifr_ifru.ifru_data, &mac, sizeof(mac));
432 if (error)
433 return (error);
434
435 error = mac_check_structmac_consistent(&mac);
436 if (error)
437 return (error);
438
439 buffer = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK);
440 error = copyinstr(mac.m_string, buffer, mac.m_buflen, NULL);
441 if (error) {
442 free(buffer, M_MACTEMP);
443 return (error);
444 }
445
446 intlabel = mac_ifnet_label_alloc();
447 error = mac_ifnet_internalize_label(intlabel, buffer);
448 free(buffer, M_MACTEMP);
449 if (error) {
450 mac_ifnet_label_free(intlabel);
451 return (error);
452 }
453
454 /*
455 * XXX: Note that this is a redundant privilege check, since policies
456 * impose this check themselves if required by the policy
457 * Eventually, this should go away.
458 */
459 error = priv_check_cred(cred, PRIV_NET_SETIFMAC, 0);
460 if (error) {
461 mac_ifnet_label_free(intlabel);
462 return (error);
463 }
464
465 MAC_IFNET_LOCK(ifp);
| 371 label);
372 MAC_CHECK_PROBE2(ifnet_check_transmit, error, ifp, m);
373 MAC_IFNET_UNLOCK(ifp);
374
375 return (error);
376}
377
378int
379mac_ifnet_ioctl_get(struct ucred *cred, struct ifreq *ifr,
380 struct ifnet *ifp)
381{
382 char *elements, *buffer;
383 struct label *intlabel;
384 struct mac mac;
385 int error;
386
387 if (!(mac_labeled & MPC_OBJECT_IFNET))
388 return (EINVAL);
389
390 error = copyin(ifr->ifr_ifru.ifru_data, &mac, sizeof(mac));
391 if (error)
392 return (error);
393
394 error = mac_check_structmac_consistent(&mac);
395 if (error)
396 return (error);
397
398 elements = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK);
399 error = copyinstr(mac.m_string, elements, mac.m_buflen, NULL);
400 if (error) {
401 free(elements, M_MACTEMP);
402 return (error);
403 }
404
405 buffer = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK | M_ZERO);
406 intlabel = mac_ifnet_label_alloc();
407 MAC_IFNET_LOCK(ifp);
408 mac_ifnet_copy_label(ifp->if_label, intlabel);
409 MAC_IFNET_UNLOCK(ifp);
410 error = mac_ifnet_externalize_label(intlabel, elements, buffer,
411 mac.m_buflen);
412 mac_ifnet_label_free(intlabel);
413 if (error == 0)
414 error = copyout(buffer, mac.m_string, strlen(buffer)+1);
415
416 free(buffer, M_MACTEMP);
417 free(elements, M_MACTEMP);
418
419 return (error);
420}
421
422int
423mac_ifnet_ioctl_set(struct ucred *cred, struct ifreq *ifr, struct ifnet *ifp)
424{
425 struct label *intlabel;
426 struct mac mac;
427 char *buffer;
428 int error;
429
430 if (!(mac_labeled & MPC_OBJECT_IFNET))
431 return (EINVAL);
432
433 error = copyin(ifr->ifr_ifru.ifru_data, &mac, sizeof(mac));
434 if (error)
435 return (error);
436
437 error = mac_check_structmac_consistent(&mac);
438 if (error)
439 return (error);
440
441 buffer = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK);
442 error = copyinstr(mac.m_string, buffer, mac.m_buflen, NULL);
443 if (error) {
444 free(buffer, M_MACTEMP);
445 return (error);
446 }
447
448 intlabel = mac_ifnet_label_alloc();
449 error = mac_ifnet_internalize_label(intlabel, buffer);
450 free(buffer, M_MACTEMP);
451 if (error) {
452 mac_ifnet_label_free(intlabel);
453 return (error);
454 }
455
456 /*
457 * XXX: Note that this is a redundant privilege check, since policies
458 * impose this check themselves if required by the policy
459 * Eventually, this should go away.
460 */
461 error = priv_check_cred(cred, PRIV_NET_SETIFMAC, 0);
462 if (error) {
463 mac_ifnet_label_free(intlabel);
464 return (error);
465 }
466
467 MAC_IFNET_LOCK(ifp);
|
466 MAC_CHECK_NOSLEEP(ifnet_check_relabel, cred, ifp, ifp->if_label,
467 intlabel);
| 468 MAC_POLICY_CHECK_NOSLEEP(ifnet_check_relabel, cred, ifp,
469 ifp->if_label, intlabel);
|
468 if (error) {
469 MAC_IFNET_UNLOCK(ifp);
470 mac_ifnet_label_free(intlabel);
471 return (error);
472 }
473
| 470 if (error) {
471 MAC_IFNET_UNLOCK(ifp);
472 mac_ifnet_label_free(intlabel);
473 return (error);
474 }
475
|
474 MAC_PERFORM_NOSLEEP(ifnet_relabel, cred, ifp, ifp->if_label,
| 476 MAC_POLICY_PERFORM_NOSLEEP(ifnet_relabel, cred, ifp, ifp->if_label,
|
475 intlabel);
476 MAC_IFNET_UNLOCK(ifp);
477
478 mac_ifnet_label_free(intlabel);
479 return (0);
480}
| 477 intlabel);
478 MAC_IFNET_UNLOCK(ifp);
479
480 mac_ifnet_label_free(intlabel);
481 return (0);
482}
|