2 * Copyright (c) 2003-2005 Sam Leffler, Errno Consulting
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 * $FreeBSD: src/sys/net80211/ieee80211_freebsd.c,v 1.7.2.2 2005/12/22 19:22:51 sam Exp $
28 * $DragonFly: src/sys/netproto/802_11/wlan/ieee80211_dragonfly.c,v 1.6 2006/11/28 14:44:03 sephe Exp $
32 * IEEE 802.11 support (DragonFlyBSD-specific code)
34 #include <sys/param.h>
35 #include <sys/kernel.h>
36 #include <sys/systm.h>
37 #include <sys/linker.h>
39 #include <sys/module.h>
41 #include <sys/sysctl.h>
43 #include <sys/socket.h>
46 #include <net/if_arp.h>
47 #include <net/if_media.h>
48 #include <net/ethernet.h>
49 #include <net/route.h>
51 #include <netproto/802_11/ieee80211_var.h>
53 #define if_link_state_change(ifp, state) ((void)0)
55 SYSCTL_NODE(_net
, OID_AUTO
, wlan
, CTLFLAG_RD
, 0, "IEEE 80211 parameters");
57 #ifdef IEEE80211_DEBUG
58 int ieee80211_debug
= 0;
59 SYSCTL_INT(_net_wlan
, OID_AUTO
, debug
, CTLFLAG_RW
, &ieee80211_debug
,
60 0, "debugging printfs");
64 ieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS
)
66 int inact
= (*(int *)arg1
) * IEEE80211_INACT_WAIT
;
69 error
= sysctl_handle_int(oidp
, &inact
, 0, req
);
70 if (error
|| !req
->newptr
)
72 *(int *)arg1
= inact
/ IEEE80211_INACT_WAIT
;
77 ieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS
)
79 struct ieee80211com
*ic
= arg1
;
80 const char *name
= ic
->ic_ifp
->if_xname
;
82 return SYSCTL_OUT(req
, name
, strlen(name
));
86 ieee80211_sysctl_attach(struct ieee80211com
*ic
)
88 struct sysctl_ctx_list
*ctx
;
89 struct sysctl_oid
*oid
;
90 char num
[14]; /* sufficient for 32 bits */
92 ctx
= kmalloc(sizeof(struct sysctl_ctx_list
), M_DEVBUF
,
96 snprintf(num
, sizeof(num
), "%u", ic
->ic_vap
);
97 oid
= SYSCTL_ADD_NODE(ctx
, &SYSCTL_NODE_CHILDREN(_net
, wlan
),
98 OID_AUTO
, num
, CTLFLAG_RD
, NULL
, "");
100 printf("add sysctl node net.wlan.%s failed\n", num
);
101 kfree(ctx
, M_DEVBUF
);
105 SYSCTL_ADD_PROC(ctx
, SYSCTL_CHILDREN(oid
), OID_AUTO
,
106 "%parent", CTLFLAG_RD
, ic
, 0, ieee80211_sysctl_parent
, "A",
108 #ifdef IEEE80211_DEBUG
109 ic
->ic_debug
= ieee80211_debug
;
110 SYSCTL_ADD_INT(ctx
, SYSCTL_CHILDREN(oid
), OID_AUTO
,
111 "debug", CTLFLAG_RW
, &ic
->ic_debug
, 0,
112 "control debugging printfs");
114 /* XXX inherit from tunables */
115 SYSCTL_ADD_PROC(ctx
, SYSCTL_CHILDREN(oid
), OID_AUTO
,
116 "inact_run", CTLTYPE_INT
| CTLFLAG_RW
, &ic
->ic_inact_run
, 0,
117 ieee80211_sysctl_inact
, "I",
118 "station inactivity timeout (sec)");
119 SYSCTL_ADD_PROC(ctx
, SYSCTL_CHILDREN(oid
), OID_AUTO
,
120 "inact_probe", CTLTYPE_INT
| CTLFLAG_RW
, &ic
->ic_inact_probe
, 0,
121 ieee80211_sysctl_inact
, "I",
122 "station inactivity probe timeout (sec)");
123 SYSCTL_ADD_PROC(ctx
, SYSCTL_CHILDREN(oid
), OID_AUTO
,
124 "inact_auth", CTLTYPE_INT
| CTLFLAG_RW
, &ic
->ic_inact_auth
, 0,
125 ieee80211_sysctl_inact
, "I",
126 "station authentication timeout (sec)");
127 SYSCTL_ADD_PROC(ctx
, SYSCTL_CHILDREN(oid
), OID_AUTO
,
128 "inact_init", CTLTYPE_INT
| CTLFLAG_RW
, &ic
->ic_inact_init
, 0,
129 ieee80211_sysctl_inact
, "I",
130 "station initial state timeout (sec)");
131 SYSCTL_ADD_INT(ctx
, SYSCTL_CHILDREN(oid
), OID_AUTO
,
132 "driver_caps", CTLFLAG_RW
, &ic
->ic_caps
, 0,
133 "driver capabilities");
134 SYSCTL_ADD_INT(ctx
, SYSCTL_CHILDREN(oid
), OID_AUTO
,
135 "bmiss_max", CTLFLAG_RW
, &ic
->ic_bmiss_max
, 0,
136 "consecutive beacon misses before scanning");
139 ic
->ic_sysctl_oid
= oid
;
143 ieee80211_sysctl_detach(struct ieee80211com
*ic
)
145 if (ic
->ic_sysctl
!= NULL
) {
146 sysctl_ctx_free(ic
->ic_sysctl
);
147 kfree(ic
->ic_sysctl
, M_DEVBUF
);
148 ic
->ic_sysctl
= NULL
;
153 ieee80211_node_dectestref(struct ieee80211_node
*ni
)
155 /* XXX need equivalent of atomic_dec_and_test */
156 atomic_subtract_int(&ni
->ni_refcnt
, 1);
157 return atomic_cmpset_int(&ni
->ni_refcnt
, 0, 1);
161 * Allocate and setup a management frame of the specified
162 * size. We return the mbuf and a pointer to the start
163 * of the contiguous data area that's been reserved based
164 * on the packet length. The data area is forced to 32-bit
165 * alignment and the buffer length to a multiple of 4 bytes.
166 * This is done mainly so beacon frames (that require this)
167 * can use this interface too.
170 ieee80211_getmgtframe(uint8_t **frm
, u_int pktlen
)
176 * NB: we know the mbuf routines will align the data area
177 * so we don't need to do anything special.
179 /* XXX 4-address frame? */
180 len
= roundup(sizeof(struct ieee80211_frame
) + pktlen
, 4);
181 KASSERT(len
<= MCLBYTES
, ("802.11 mgt frame too large: %u", len
));
182 if (len
< MINCLSIZE
) {
183 m
= m_gethdr(MB_DONTWAIT
, MT_HEADER
);
185 * Align the data in case additional headers are added.
186 * This should only happen when a WEP header is added
187 * which only happens for shared key authentication mgt
188 * frames which all fit in MHLEN.
193 m
= m_getcl(MB_DONTWAIT
, MT_HEADER
, M_PKTHDR
);
195 m
->m_data
+= sizeof(struct ieee80211_frame
);
201 #include <sys/libkern.h>
204 get_random_bytes(void *p
, size_t n
)
209 uint32_t v
= karc4random();
210 size_t nb
= n
> sizeof(uint32_t) ? sizeof(uint32_t) : n
;
212 bcopy(&v
, dp
, n
> sizeof(uint32_t) ? sizeof(uint32_t) : n
);
213 dp
+= sizeof(uint32_t), n
-= nb
;
218 ieee80211_notify_node_join(struct ieee80211com
*ic
, struct ieee80211_node
*ni
,
221 struct ifnet
*ifp
= ic
->ic_ifp
;
222 struct ieee80211_join_event iev
;
224 memset(&iev
, 0, sizeof(iev
));
225 if (ni
== ic
->ic_bss
) {
226 IEEE80211_ADDR_COPY(iev
.iev_addr
, ni
->ni_bssid
);
227 rt_ieee80211msg(ifp
, newassoc
?
228 RTM_IEEE80211_ASSOC
: RTM_IEEE80211_REASSOC
,
230 if_link_state_change(ifp
, LINK_STATE_UP
);
232 IEEE80211_ADDR_COPY(iev
.iev_addr
, ni
->ni_macaddr
);
233 rt_ieee80211msg(ifp
, newassoc
?
234 RTM_IEEE80211_JOIN
: RTM_IEEE80211_REJOIN
,
240 ieee80211_notify_node_leave(struct ieee80211com
*ic
, struct ieee80211_node
*ni
)
242 struct ifnet
*ifp
= ic
->ic_ifp
;
243 struct ieee80211_leave_event iev
;
245 if (ni
== ic
->ic_bss
) {
246 rt_ieee80211msg(ifp
, RTM_IEEE80211_DISASSOC
, NULL
, 0);
247 if_link_state_change(ifp
, LINK_STATE_DOWN
);
249 /* fire off wireless event station leaving */
250 memset(&iev
, 0, sizeof(iev
));
251 IEEE80211_ADDR_COPY(iev
.iev_addr
, ni
->ni_macaddr
);
252 rt_ieee80211msg(ifp
, RTM_IEEE80211_LEAVE
, &iev
, sizeof(iev
));
257 ieee80211_notify_scan_done(struct ieee80211com
*ic
)
259 struct ifnet
*ifp
= ic
->ic_ifp
;
261 IEEE80211_DPRINTF(ic
, IEEE80211_MSG_SCAN
, "%s\n", "notify scan done");
263 /* dispatch wireless event indicating scan completed */
264 rt_ieee80211msg(ifp
, RTM_IEEE80211_SCAN
, NULL
, 0);
268 ieee80211_notify_replay_failure(struct ieee80211com
*ic
,
269 const struct ieee80211_frame
*wh
, const struct ieee80211_key
*k
,
272 struct ifnet
*ifp
= ic
->ic_ifp
;
274 IEEE80211_DPRINTF(ic
, IEEE80211_MSG_CRYPTO
,
275 "[%6D] %s replay detected <rsc %ju, csc %ju, keyix %u rxkeyix %u>\n",
276 wh
->i_addr2
, ":", k
->wk_cipher
->ic_name
,
277 (intmax_t) rsc
, (intmax_t) k
->wk_keyrsc
,
278 k
->wk_keyix
, k
->wk_rxkeyix
);
280 if (ifp
!= NULL
) { /* NB: for cipher test modules */
281 struct ieee80211_replay_event iev
;
283 IEEE80211_ADDR_COPY(iev
.iev_dst
, wh
->i_addr1
);
284 IEEE80211_ADDR_COPY(iev
.iev_src
, wh
->i_addr2
);
285 iev
.iev_cipher
= k
->wk_cipher
->ic_cipher
;
286 if (k
->wk_rxkeyix
!= IEEE80211_KEYIX_NONE
)
287 iev
.iev_keyix
= k
->wk_rxkeyix
;
289 iev
.iev_keyix
= k
->wk_keyix
;
290 iev
.iev_keyrsc
= k
->wk_keyrsc
;
292 rt_ieee80211msg(ifp
, RTM_IEEE80211_REPLAY
, &iev
, sizeof(iev
));
297 ieee80211_notify_michael_failure(struct ieee80211com
*ic
,
298 const struct ieee80211_frame
*wh
, u_int keyix
)
300 struct ifnet
*ifp
= ic
->ic_ifp
;
302 IEEE80211_DPRINTF(ic
, IEEE80211_MSG_CRYPTO
,
303 "[%6D] michael MIC verification failed <keyix %u>\n",
304 wh
->i_addr2
, ":", keyix
);
305 ic
->ic_stats
.is_rx_tkipmic
++;
307 if (ifp
!= NULL
) { /* NB: for cipher test modules */
308 struct ieee80211_michael_event iev
;
310 IEEE80211_ADDR_COPY(iev
.iev_dst
, wh
->i_addr1
);
311 IEEE80211_ADDR_COPY(iev
.iev_src
, wh
->i_addr2
);
312 iev
.iev_cipher
= IEEE80211_CIPHER_TKIP
;
313 iev
.iev_keyix
= keyix
;
314 rt_ieee80211msg(ifp
, RTM_IEEE80211_MICHAEL
, &iev
, sizeof(iev
));
319 ieee80211_load_module(const char *modname
)
322 struct thread
*td
= curthread
;
324 if (suser(td
) == 0 && securelevel_gt(td
->td_ucred
, 0) == 0) {
325 crit_enter(); /* NB: need BGL here */
326 linker_load_module(modname
, NULL
, NULL
, NULL
, NULL
);
330 printf("%s: load the %s module by hand for now.\n", __func__
, modname
);
335 * Append the specified data to the indicated mbuf chain,
336 * Extend the mbuf chain if the new data does not fit in
339 * Return 1 if able to complete the job; otherwise 0.
342 ieee80211_mbuf_append(struct mbuf
*m0
, int len
, const uint8_t *cp
)
345 int remainder
, space
;
347 for (m
= m0
; m
->m_next
!= NULL
; m
= m
->m_next
)
350 space
= M_TRAILINGSPACE(m
);
353 * Copy into available space.
355 if (space
> remainder
)
357 bcopy(cp
, mtod(m
, caddr_t
) + m
->m_len
, space
);
359 cp
+= space
, remainder
-= space
;
361 while (remainder
> 0) {
363 * Allocate a new mbuf; could check space
364 * and allocate a cluster instead.
366 n
= m_get(MB_DONTWAIT
, m
->m_type
);
369 n
->m_len
= min(MLEN
, remainder
);
370 bcopy(cp
, mtod(n
, caddr_t
), n
->m_len
);
371 cp
+= n
->m_len
, remainder
-= n
->m_len
;
375 if (m0
->m_flags
& M_PKTHDR
)
376 m0
->m_pkthdr
.len
+= len
- remainder
;
377 return (remainder
== 0);
381 * Create a writable copy of the mbuf chain. While doing this
382 * we compact the chain with a goal of producing a chain with
383 * at most two mbufs. The second mbuf in this chain is likely
384 * to be a cluster. The primary purpose of this work is to create
385 * a writable packet for encryption, compression, etc. The
386 * secondary goal is to linearize the data so the data can be
387 * passed to crypto hardware in the most efficient manner possible.
390 ieee80211_mbuf_clone(struct mbuf
*m0
, int how
)
392 struct mbuf
*m
, *mprev
;
393 struct mbuf
*n
, *mfirst
, *mlast
;
397 for (m
= m0
; m
!= NULL
; m
= mprev
->m_next
) {
399 * Regular mbufs are ignored unless there's a cluster
400 * in front of it that we can use to coalesce. We do
401 * the latter mainly so later clusters can be coalesced
402 * also w/o having to handle them specially (i.e. convert
403 * mbuf+cluster -> cluster). This optimization is heavily
404 * influenced by the assumption that we're running over
405 * Ethernet where MCLBYTES is large enough that the max
406 * packet size will permit lots of coalescing into a
407 * single cluster. This in turn permits efficient
408 * crypto operations, especially when using hardware.
410 if ((m
->m_flags
& M_EXT
) == 0) {
411 if (mprev
&& (mprev
->m_flags
& M_EXT
) &&
412 m
->m_len
<= M_TRAILINGSPACE(mprev
)) {
413 /* XXX: this ignores mbuf types */
414 memcpy(mtod(mprev
, caddr_t
) + mprev
->m_len
,
415 mtod(m
, caddr_t
), m
->m_len
);
416 mprev
->m_len
+= m
->m_len
;
417 mprev
->m_next
= m
->m_next
; /* unlink from chain */
418 m_free(m
); /* reclaim mbuf */
425 * Writable mbufs are left alone (for now).
433 * Not writable, replace with a copy or coalesce with
434 * the previous mbuf if possible (since we have to copy
435 * it anyway, we try to reduce the number of mbufs and
436 * clusters so that future work is easier).
438 KASSERT(m
->m_flags
& M_EXT
, ("m_flags 0x%x", m
->m_flags
));
439 /* NB: we only coalesce into a cluster or larger */
440 if (mprev
!= NULL
&& (mprev
->m_flags
& M_EXT
) &&
441 m
->m_len
<= M_TRAILINGSPACE(mprev
)) {
442 /* XXX: this ignores mbuf types */
443 memcpy(mtod(mprev
, caddr_t
) + mprev
->m_len
,
444 mtod(m
, caddr_t
), m
->m_len
);
445 mprev
->m_len
+= m
->m_len
;
446 mprev
->m_next
= m
->m_next
; /* unlink from chain */
447 m_free(m
); /* reclaim mbuf */
452 * Allocate new space to hold the copy...
454 /* XXX why can M_PKTHDR be set past the first mbuf? */
455 if (mprev
== NULL
&& (m
->m_flags
& M_PKTHDR
)) {
457 * NB: if a packet header is present we must
458 * allocate the mbuf separately from any cluster
459 * because M_MOVE_PKTHDR will smash the data
460 * pointer and drop the M_EXT marker.
462 MGETHDR(n
, how
, m
->m_type
);
469 if ((n
->m_flags
& M_EXT
) == 0) {
475 n
= m_getcl(how
, m
->m_type
, m
->m_flags
);
482 * ... and copy the data. We deal with jumbo mbufs
483 * (i.e. m_len > MCLBYTES) by splitting them into
484 * clusters. We could just malloc a buffer and make
485 * it external but too many device drivers don't know
486 * how to break up the non-contiguous memory when
494 int cc
= min(len
, MCLBYTES
);
495 memcpy(mtod(n
, caddr_t
), mtod(m
, caddr_t
) + off
, cc
);
506 n
= m_getcl(how
, m
->m_type
, m
->m_flags
);
513 n
->m_next
= m
->m_next
;
515 m0
= mfirst
; /* new head of chain */
517 mprev
->m_next
= mfirst
; /* replace old mbuf */
518 m_free(m
); /* release old mbuf */
527 * NB: the module name is "wlan" for compatibility with NetBSD.
530 wlan_modevent(module_t mod
, int type
, void *unused
)
535 printf("wlan: <802.11 Link Layer>\n");
543 static moduledata_t wlan_mod
= {
548 DECLARE_MODULE(wlan
, wlan_mod
, SI_SUB_DRIVERS
, SI_ORDER_FIRST
);
549 MODULE_VERSION(wlan
, 1);
550 MODULE_DEPEND(wlan
, crypto
, 1, 1, 1);