1/*-
2 * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include <sys/cdefs.h>
27#ifdef __FreeBSD__
| 1/*-
2 * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include <sys/cdefs.h>
27#ifdef __FreeBSD__
|
28__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_wds.c 271861 2014-09-19 09:20:55Z glebius $");
| 28__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_wds.c 282820 2015-05-12 16:55:50Z adrian $");
|
29#endif
30
31/*
32 * IEEE 802.11 WDS mode support.
33 */
34#include "opt_inet.h"
35#include "opt_wlan.h"
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/mbuf.h>
40#include <sys/malloc.h>
41#include <sys/kernel.h>
42
43#include <sys/socket.h>
44#include <sys/sockio.h>
45#include <sys/endian.h>
46#include <sys/errno.h>
47#include <sys/proc.h>
48#include <sys/sysctl.h>
49
50#include <net/if.h>
51#include <net/if_var.h>
52#include <net/if_media.h>
53#include <net/if_llc.h>
54#include <net/ethernet.h>
55
56#include <net/bpf.h>
57
58#include <net80211/ieee80211_var.h>
59#include <net80211/ieee80211_wds.h>
60#include <net80211/ieee80211_input.h>
61#ifdef IEEE80211_SUPPORT_SUPERG
62#include <net80211/ieee80211_superg.h>
63#endif
64
65static void wds_vattach(struct ieee80211vap *);
66static int wds_newstate(struct ieee80211vap *, enum ieee80211_state, int);
67static int wds_input(struct ieee80211_node *ni, struct mbuf *m, int, int);
68static void wds_recv_mgmt(struct ieee80211_node *, struct mbuf *,
69 int subtype, int, int);
70
71void
72ieee80211_wds_attach(struct ieee80211com *ic)
73{
74 ic->ic_vattach[IEEE80211_M_WDS] = wds_vattach;
75}
76
77void
78ieee80211_wds_detach(struct ieee80211com *ic)
79{
80}
81
82static void
83wds_vdetach(struct ieee80211vap *vap)
84{
85 if (vap->iv_bss != NULL) {
86 /* XXX locking? */
87 if (vap->iv_bss->ni_wdsvap == vap)
88 vap->iv_bss->ni_wdsvap = NULL;
89 }
90}
91
92static void
93wds_vattach(struct ieee80211vap *vap)
94{
95 vap->iv_newstate = wds_newstate;
96 vap->iv_input = wds_input;
97 vap->iv_recv_mgmt = wds_recv_mgmt;
98 vap->iv_opdetach = wds_vdetach;
99}
100
101static void
102wds_flush(struct ieee80211_node *ni)
103{
104 struct ieee80211com *ic = ni->ni_ic;
105 struct mbuf *m, *next;
106 int8_t rssi, nf;
107
108 m = ieee80211_ageq_remove(&ic->ic_stageq,
109 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
110 if (m == NULL)
111 return;
112
113 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_WDS, ni,
114 "%s", "flush wds queue");
115 ic->ic_node_getsignal(ni, &rssi, &nf);
116 for (; m != NULL; m = next) {
117 next = m->m_nextpkt;
118 m->m_nextpkt = NULL;
119 ieee80211_input(ni, m, rssi, nf);
120 }
121}
122
123static int
124ieee80211_create_wds(struct ieee80211vap *vap, struct ieee80211_channel *chan)
125{
126 struct ieee80211com *ic = vap->iv_ic;
127 struct ieee80211_node_table *nt = &ic->ic_sta;
128 struct ieee80211_node *ni, *obss;
129
130 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS,
131 "%s: creating link to %s on channel %u\n", __func__,
132 ether_sprintf(vap->iv_des_bssid), ieee80211_chan2ieee(ic, chan));
133
134 /* NB: vap create must specify the bssid for the link */
135 KASSERT(vap->iv_flags & IEEE80211_F_DESBSSID, ("no bssid"));
136 /* NB: we should only be called on RUN transition */
137 KASSERT(vap->iv_state == IEEE80211_S_RUN, ("!RUN state"));
138
139 if ((vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) {
140 /*
141 * Dynamic/non-legacy WDS. Reference the associated
142 * station specified by the desired bssid setup at vap
143 * create. Point ni_wdsvap at the WDS vap so 4-address
144 * frames received through the associated AP vap will
145 * be dispatched upward (e.g. to a bridge) as though
146 * they arrived on the WDS vap.
147 */
148 IEEE80211_NODE_LOCK(nt);
149 obss = NULL;
150 ni = ieee80211_find_node_locked(&ic->ic_sta, vap->iv_des_bssid);
151 if (ni == NULL) {
152 /*
153 * Node went away before we could hookup. This
154 * should be ok; no traffic will flow and a leave
155 * event will be dispatched that should cause
156 * the vap to be destroyed.
157 */
158 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS,
159 "%s: station %s went away\n",
160 __func__, ether_sprintf(vap->iv_des_bssid));
161 /* XXX stat? */
162 } else if (ni->ni_wdsvap != NULL) {
163 /*
164 * Node already setup with a WDS vap; we cannot
165 * allow multiple references so disallow. If
166 * ni_wdsvap points at us that's ok; we should
167 * do nothing anyway.
168 */
169 /* XXX printf instead? */
170 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS,
171 "%s: station %s in use with %s\n",
172 __func__, ether_sprintf(vap->iv_des_bssid),
173 ni->ni_wdsvap->iv_ifp->if_xname);
174 /* XXX stat? */
175 } else {
176 /*
177 * Committed to new node, setup state.
178 */
179 obss = vap->iv_bss;
180 vap->iv_bss = ni;
181 ni->ni_wdsvap = vap;
182 }
183 IEEE80211_NODE_UNLOCK(nt);
184 if (obss != NULL) {
185 /* NB: deferred to avoid recursive lock */
186 ieee80211_free_node(obss);
187 }
188 } else {
189 /*
190 * Legacy WDS vap setup.
191 */
192 /*
193 * The far end does not associate so we just create
194 * create a new node and install it as the vap's
195 * bss node. We must simulate an association and
196 * authorize the port for traffic to flow.
197 * XXX check if node already in sta table?
198 */
199 ni = ieee80211_node_create_wds(vap, vap->iv_des_bssid, chan);
200 if (ni != NULL) {
201 obss = vap->iv_bss;
202 vap->iv_bss = ieee80211_ref_node(ni);
203 ni->ni_flags |= IEEE80211_NODE_AREF;
204 if (obss != NULL)
205 ieee80211_free_node(obss);
206 /* give driver a chance to setup state like ni_txrate */
207 if (ic->ic_newassoc != NULL)
208 ic->ic_newassoc(ni, 1);
209 /* tell the authenticator about new station */
210 if (vap->iv_auth->ia_node_join != NULL)
211 vap->iv_auth->ia_node_join(ni);
212 if (ni->ni_authmode != IEEE80211_AUTH_8021X)
213 ieee80211_node_authorize(ni);
214
215 ieee80211_notify_node_join(ni, 1 /*newassoc*/);
216 /* XXX inject l2uf frame */
217 }
218 }
219
220 /*
221 * Flush any pending frames now that were setup.
222 */
223 if (ni != NULL)
224 wds_flush(ni);
225 return (ni == NULL ? ENOENT : 0);
226}
227
228/*
229 * Propagate multicast frames of an ap vap to all DWDS links.
230 * The caller is assumed to have verified this frame is multicast.
231 */
232void
233ieee80211_dwds_mcast(struct ieee80211vap *vap0, struct mbuf *m)
234{
235 struct ieee80211com *ic = vap0->iv_ic;
236 const struct ether_header *eh = mtod(m, const struct ether_header *);
237 struct ieee80211_node *ni;
238 struct ieee80211vap *vap;
239 struct ifnet *ifp;
240 struct mbuf *mcopy;
241 int err;
242
243 KASSERT(ETHER_IS_MULTICAST(eh->ether_dhost),
244 ("%s not mcast", ether_sprintf(eh->ether_dhost)));
245
246 /* XXX locking */
247 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
248 /* only DWDS vaps are interesting */
249 if (vap->iv_opmode != IEEE80211_M_WDS ||
250 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY))
251 continue;
252 /* if it came in this interface, don't send it back out */
253 ifp = vap->iv_ifp;
254 if (ifp == m->m_pkthdr.rcvif)
255 continue;
256 /*
257 * Duplicate the frame and send it.
258 */
259 mcopy = m_copypacket(m, M_NOWAIT);
260 if (mcopy == NULL) {
261 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
262 /* XXX stat + msg */
263 continue;
264 }
265 ni = ieee80211_find_txnode(vap, eh->ether_dhost);
266 if (ni == NULL) {
267 /* NB: ieee80211_find_txnode does stat+msg */
268 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
269 m_freem(mcopy);
270 continue;
271 }
272 /* calculate priority so drivers can find the tx queue */
273 if (ieee80211_classify(ni, mcopy)) {
274 IEEE80211_DISCARD_MAC(vap,
275 IEEE80211_MSG_OUTPUT | IEEE80211_MSG_WDS,
276 eh->ether_dhost, NULL,
277 "%s", "classification failure");
278 vap->iv_stats.is_tx_classify++;
279 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
280 m_freem(mcopy);
281 ieee80211_free_node(ni);
282 continue;
283 }
284
285 BPF_MTAP(ifp, m); /* 802.3 tx */
286
287 /*
288 * Encapsulate the packet in prep for transmission.
289 */
290 mcopy = ieee80211_encap(vap, ni, mcopy);
291 if (mcopy == NULL) {
292 /* NB: stat+msg handled in ieee80211_encap */
293 ieee80211_free_node(ni);
294 continue;
295 }
296 mcopy->m_flags |= M_MCAST;
297 mcopy->m_pkthdr.rcvif = (void *) ni;
298
299 err = ieee80211_parent_xmitpkt(ic, mcopy);
300 if (err) {
301 /* NB: IFQ_HANDOFF reclaims mbuf */
302 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
303 ieee80211_free_node(ni);
304 } else
305 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
306 }
307}
308
309/*
310 * Handle DWDS discovery on receipt of a 4-address frame in
311 * ap mode. Queue the frame and post an event for someone
312 * to plumb the necessary WDS vap for this station. Frames
313 * received prior to the vap set running will then be reprocessed
314 * as if they were just received.
315 */
316void
317ieee80211_dwds_discover(struct ieee80211_node *ni, struct mbuf *m)
318{
319 struct ieee80211com *ic = ni->ni_ic;
320
321 /*
322 * Save the frame with an aging interval 4 times
323 * the listen interval specified by the station.
324 * Frames that sit around too long are reclaimed
325 * using this information.
326 * XXX handle overflow?
327 * XXX per/vap beacon interval?
328 */
329 m->m_pkthdr.rcvif = (void *)(uintptr_t)
330 ieee80211_mac_hash(ic, ni->ni_macaddr);
331 (void) ieee80211_ageq_append(&ic->ic_stageq, m,
332 ((ni->ni_intval * ic->ic_lintval) << 2) / 1024);
333 ieee80211_notify_wds_discover(ni);
334}
335
336/*
337 * IEEE80211_M_WDS vap state machine handler.
338 */
339static int
340wds_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
341{
342 struct ieee80211com *ic = vap->iv_ic;
343 struct ieee80211_node *ni;
344 enum ieee80211_state ostate;
345 int error;
346
347 IEEE80211_LOCK_ASSERT(ic);
348
349 ostate = vap->iv_state;
350 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s\n", __func__,
351 ieee80211_state_name[ostate], ieee80211_state_name[nstate]);
352 vap->iv_state = nstate; /* state transition */
353 callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */
354 if (ostate != IEEE80211_S_SCAN)
355 ieee80211_cancel_scan(vap); /* background scan */
356 ni = vap->iv_bss; /* NB: no reference held */
357 error = 0;
358 switch (nstate) {
359 case IEEE80211_S_INIT:
360 switch (ostate) {
361 case IEEE80211_S_SCAN:
362 ieee80211_cancel_scan(vap);
363 break;
364 default:
365 break;
366 }
367 if (ostate != IEEE80211_S_INIT) {
368 /* NB: optimize INIT -> INIT case */
369 ieee80211_reset_bss(vap);
370 }
371 break;
372 case IEEE80211_S_SCAN:
373 switch (ostate) {
374 case IEEE80211_S_INIT:
375 ieee80211_check_scan_current(vap);
376 break;
377 default:
378 break;
379 }
380 break;
381 case IEEE80211_S_RUN:
382 if (ostate == IEEE80211_S_INIT) {
383 /*
384 * Already have a channel; bypass the scan
385 * and startup immediately.
386 */
387 error = ieee80211_create_wds(vap, ic->ic_curchan);
388 }
389 break;
390 default:
391 break;
392 }
393 return error;
394}
395
396/*
397 * Process a received frame. The node associated with the sender
398 * should be supplied. If nothing was found in the node table then
399 * the caller is assumed to supply a reference to iv_bss instead.
400 * The RSSI and a timestamp are also supplied. The RSSI data is used
401 * during AP scanning to select a AP to associate with; it can have
402 * any units so long as values have consistent units and higher values
403 * mean ``better signal''. The receive timestamp is currently not used
404 * by the 802.11 layer.
405 */
406static int
407wds_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
408{
| 29#endif
30
31/*
32 * IEEE 802.11 WDS mode support.
33 */
34#include "opt_inet.h"
35#include "opt_wlan.h"
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/mbuf.h>
40#include <sys/malloc.h>
41#include <sys/kernel.h>
42
43#include <sys/socket.h>
44#include <sys/sockio.h>
45#include <sys/endian.h>
46#include <sys/errno.h>
47#include <sys/proc.h>
48#include <sys/sysctl.h>
49
50#include <net/if.h>
51#include <net/if_var.h>
52#include <net/if_media.h>
53#include <net/if_llc.h>
54#include <net/ethernet.h>
55
56#include <net/bpf.h>
57
58#include <net80211/ieee80211_var.h>
59#include <net80211/ieee80211_wds.h>
60#include <net80211/ieee80211_input.h>
61#ifdef IEEE80211_SUPPORT_SUPERG
62#include <net80211/ieee80211_superg.h>
63#endif
64
65static void wds_vattach(struct ieee80211vap *);
66static int wds_newstate(struct ieee80211vap *, enum ieee80211_state, int);
67static int wds_input(struct ieee80211_node *ni, struct mbuf *m, int, int);
68static void wds_recv_mgmt(struct ieee80211_node *, struct mbuf *,
69 int subtype, int, int);
70
71void
72ieee80211_wds_attach(struct ieee80211com *ic)
73{
74 ic->ic_vattach[IEEE80211_M_WDS] = wds_vattach;
75}
76
77void
78ieee80211_wds_detach(struct ieee80211com *ic)
79{
80}
81
82static void
83wds_vdetach(struct ieee80211vap *vap)
84{
85 if (vap->iv_bss != NULL) {
86 /* XXX locking? */
87 if (vap->iv_bss->ni_wdsvap == vap)
88 vap->iv_bss->ni_wdsvap = NULL;
89 }
90}
91
92static void
93wds_vattach(struct ieee80211vap *vap)
94{
95 vap->iv_newstate = wds_newstate;
96 vap->iv_input = wds_input;
97 vap->iv_recv_mgmt = wds_recv_mgmt;
98 vap->iv_opdetach = wds_vdetach;
99}
100
101static void
102wds_flush(struct ieee80211_node *ni)
103{
104 struct ieee80211com *ic = ni->ni_ic;
105 struct mbuf *m, *next;
106 int8_t rssi, nf;
107
108 m = ieee80211_ageq_remove(&ic->ic_stageq,
109 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
110 if (m == NULL)
111 return;
112
113 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_WDS, ni,
114 "%s", "flush wds queue");
115 ic->ic_node_getsignal(ni, &rssi, &nf);
116 for (; m != NULL; m = next) {
117 next = m->m_nextpkt;
118 m->m_nextpkt = NULL;
119 ieee80211_input(ni, m, rssi, nf);
120 }
121}
122
123static int
124ieee80211_create_wds(struct ieee80211vap *vap, struct ieee80211_channel *chan)
125{
126 struct ieee80211com *ic = vap->iv_ic;
127 struct ieee80211_node_table *nt = &ic->ic_sta;
128 struct ieee80211_node *ni, *obss;
129
130 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS,
131 "%s: creating link to %s on channel %u\n", __func__,
132 ether_sprintf(vap->iv_des_bssid), ieee80211_chan2ieee(ic, chan));
133
134 /* NB: vap create must specify the bssid for the link */
135 KASSERT(vap->iv_flags & IEEE80211_F_DESBSSID, ("no bssid"));
136 /* NB: we should only be called on RUN transition */
137 KASSERT(vap->iv_state == IEEE80211_S_RUN, ("!RUN state"));
138
139 if ((vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) {
140 /*
141 * Dynamic/non-legacy WDS. Reference the associated
142 * station specified by the desired bssid setup at vap
143 * create. Point ni_wdsvap at the WDS vap so 4-address
144 * frames received through the associated AP vap will
145 * be dispatched upward (e.g. to a bridge) as though
146 * they arrived on the WDS vap.
147 */
148 IEEE80211_NODE_LOCK(nt);
149 obss = NULL;
150 ni = ieee80211_find_node_locked(&ic->ic_sta, vap->iv_des_bssid);
151 if (ni == NULL) {
152 /*
153 * Node went away before we could hookup. This
154 * should be ok; no traffic will flow and a leave
155 * event will be dispatched that should cause
156 * the vap to be destroyed.
157 */
158 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS,
159 "%s: station %s went away\n",
160 __func__, ether_sprintf(vap->iv_des_bssid));
161 /* XXX stat? */
162 } else if (ni->ni_wdsvap != NULL) {
163 /*
164 * Node already setup with a WDS vap; we cannot
165 * allow multiple references so disallow. If
166 * ni_wdsvap points at us that's ok; we should
167 * do nothing anyway.
168 */
169 /* XXX printf instead? */
170 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS,
171 "%s: station %s in use with %s\n",
172 __func__, ether_sprintf(vap->iv_des_bssid),
173 ni->ni_wdsvap->iv_ifp->if_xname);
174 /* XXX stat? */
175 } else {
176 /*
177 * Committed to new node, setup state.
178 */
179 obss = vap->iv_bss;
180 vap->iv_bss = ni;
181 ni->ni_wdsvap = vap;
182 }
183 IEEE80211_NODE_UNLOCK(nt);
184 if (obss != NULL) {
185 /* NB: deferred to avoid recursive lock */
186 ieee80211_free_node(obss);
187 }
188 } else {
189 /*
190 * Legacy WDS vap setup.
191 */
192 /*
193 * The far end does not associate so we just create
194 * create a new node and install it as the vap's
195 * bss node. We must simulate an association and
196 * authorize the port for traffic to flow.
197 * XXX check if node already in sta table?
198 */
199 ni = ieee80211_node_create_wds(vap, vap->iv_des_bssid, chan);
200 if (ni != NULL) {
201 obss = vap->iv_bss;
202 vap->iv_bss = ieee80211_ref_node(ni);
203 ni->ni_flags |= IEEE80211_NODE_AREF;
204 if (obss != NULL)
205 ieee80211_free_node(obss);
206 /* give driver a chance to setup state like ni_txrate */
207 if (ic->ic_newassoc != NULL)
208 ic->ic_newassoc(ni, 1);
209 /* tell the authenticator about new station */
210 if (vap->iv_auth->ia_node_join != NULL)
211 vap->iv_auth->ia_node_join(ni);
212 if (ni->ni_authmode != IEEE80211_AUTH_8021X)
213 ieee80211_node_authorize(ni);
214
215 ieee80211_notify_node_join(ni, 1 /*newassoc*/);
216 /* XXX inject l2uf frame */
217 }
218 }
219
220 /*
221 * Flush any pending frames now that were setup.
222 */
223 if (ni != NULL)
224 wds_flush(ni);
225 return (ni == NULL ? ENOENT : 0);
226}
227
228/*
229 * Propagate multicast frames of an ap vap to all DWDS links.
230 * The caller is assumed to have verified this frame is multicast.
231 */
232void
233ieee80211_dwds_mcast(struct ieee80211vap *vap0, struct mbuf *m)
234{
235 struct ieee80211com *ic = vap0->iv_ic;
236 const struct ether_header *eh = mtod(m, const struct ether_header *);
237 struct ieee80211_node *ni;
238 struct ieee80211vap *vap;
239 struct ifnet *ifp;
240 struct mbuf *mcopy;
241 int err;
242
243 KASSERT(ETHER_IS_MULTICAST(eh->ether_dhost),
244 ("%s not mcast", ether_sprintf(eh->ether_dhost)));
245
246 /* XXX locking */
247 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
248 /* only DWDS vaps are interesting */
249 if (vap->iv_opmode != IEEE80211_M_WDS ||
250 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY))
251 continue;
252 /* if it came in this interface, don't send it back out */
253 ifp = vap->iv_ifp;
254 if (ifp == m->m_pkthdr.rcvif)
255 continue;
256 /*
257 * Duplicate the frame and send it.
258 */
259 mcopy = m_copypacket(m, M_NOWAIT);
260 if (mcopy == NULL) {
261 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
262 /* XXX stat + msg */
263 continue;
264 }
265 ni = ieee80211_find_txnode(vap, eh->ether_dhost);
266 if (ni == NULL) {
267 /* NB: ieee80211_find_txnode does stat+msg */
268 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
269 m_freem(mcopy);
270 continue;
271 }
272 /* calculate priority so drivers can find the tx queue */
273 if (ieee80211_classify(ni, mcopy)) {
274 IEEE80211_DISCARD_MAC(vap,
275 IEEE80211_MSG_OUTPUT | IEEE80211_MSG_WDS,
276 eh->ether_dhost, NULL,
277 "%s", "classification failure");
278 vap->iv_stats.is_tx_classify++;
279 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
280 m_freem(mcopy);
281 ieee80211_free_node(ni);
282 continue;
283 }
284
285 BPF_MTAP(ifp, m); /* 802.3 tx */
286
287 /*
288 * Encapsulate the packet in prep for transmission.
289 */
290 mcopy = ieee80211_encap(vap, ni, mcopy);
291 if (mcopy == NULL) {
292 /* NB: stat+msg handled in ieee80211_encap */
293 ieee80211_free_node(ni);
294 continue;
295 }
296 mcopy->m_flags |= M_MCAST;
297 mcopy->m_pkthdr.rcvif = (void *) ni;
298
299 err = ieee80211_parent_xmitpkt(ic, mcopy);
300 if (err) {
301 /* NB: IFQ_HANDOFF reclaims mbuf */
302 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
303 ieee80211_free_node(ni);
304 } else
305 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
306 }
307}
308
309/*
310 * Handle DWDS discovery on receipt of a 4-address frame in
311 * ap mode. Queue the frame and post an event for someone
312 * to plumb the necessary WDS vap for this station. Frames
313 * received prior to the vap set running will then be reprocessed
314 * as if they were just received.
315 */
316void
317ieee80211_dwds_discover(struct ieee80211_node *ni, struct mbuf *m)
318{
319 struct ieee80211com *ic = ni->ni_ic;
320
321 /*
322 * Save the frame with an aging interval 4 times
323 * the listen interval specified by the station.
324 * Frames that sit around too long are reclaimed
325 * using this information.
326 * XXX handle overflow?
327 * XXX per/vap beacon interval?
328 */
329 m->m_pkthdr.rcvif = (void *)(uintptr_t)
330 ieee80211_mac_hash(ic, ni->ni_macaddr);
331 (void) ieee80211_ageq_append(&ic->ic_stageq, m,
332 ((ni->ni_intval * ic->ic_lintval) << 2) / 1024);
333 ieee80211_notify_wds_discover(ni);
334}
335
336/*
337 * IEEE80211_M_WDS vap state machine handler.
338 */
339static int
340wds_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
341{
342 struct ieee80211com *ic = vap->iv_ic;
343 struct ieee80211_node *ni;
344 enum ieee80211_state ostate;
345 int error;
346
347 IEEE80211_LOCK_ASSERT(ic);
348
349 ostate = vap->iv_state;
350 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s\n", __func__,
351 ieee80211_state_name[ostate], ieee80211_state_name[nstate]);
352 vap->iv_state = nstate; /* state transition */
353 callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */
354 if (ostate != IEEE80211_S_SCAN)
355 ieee80211_cancel_scan(vap); /* background scan */
356 ni = vap->iv_bss; /* NB: no reference held */
357 error = 0;
358 switch (nstate) {
359 case IEEE80211_S_INIT:
360 switch (ostate) {
361 case IEEE80211_S_SCAN:
362 ieee80211_cancel_scan(vap);
363 break;
364 default:
365 break;
366 }
367 if (ostate != IEEE80211_S_INIT) {
368 /* NB: optimize INIT -> INIT case */
369 ieee80211_reset_bss(vap);
370 }
371 break;
372 case IEEE80211_S_SCAN:
373 switch (ostate) {
374 case IEEE80211_S_INIT:
375 ieee80211_check_scan_current(vap);
376 break;
377 default:
378 break;
379 }
380 break;
381 case IEEE80211_S_RUN:
382 if (ostate == IEEE80211_S_INIT) {
383 /*
384 * Already have a channel; bypass the scan
385 * and startup immediately.
386 */
387 error = ieee80211_create_wds(vap, ic->ic_curchan);
388 }
389 break;
390 default:
391 break;
392 }
393 return error;
394}
395
396/*
397 * Process a received frame. The node associated with the sender
398 * should be supplied. If nothing was found in the node table then
399 * the caller is assumed to supply a reference to iv_bss instead.
400 * The RSSI and a timestamp are also supplied. The RSSI data is used
401 * during AP scanning to select a AP to associate with; it can have
402 * any units so long as values have consistent units and higher values
403 * mean ``better signal''. The receive timestamp is currently not used
404 * by the 802.11 layer.
405 */
406static int
407wds_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
408{
|
409#define HAS_SEQ(type) ((type & 0x4) == 0)
| |
410 struct ieee80211vap *vap = ni->ni_vap;
411 struct ieee80211com *ic = ni->ni_ic;
412 struct ifnet *ifp = vap->iv_ifp;
413 struct ieee80211_frame *wh;
414 struct ieee80211_key *key;
415 struct ether_header *eh;
416 int hdrspace, need_tap = 1; /* mbuf need to be tapped. */
417 uint8_t dir, type, subtype, qos;
418 uint16_t rxseq;
419
420 if (m->m_flags & M_AMPDU_MPDU) {
421 /*
422 * Fastpath for A-MPDU reorder q resubmission. Frames
423 * w/ M_AMPDU_MPDU marked have already passed through
424 * here but were received out of order and been held on
425 * the reorder queue. When resubmitted they are marked
426 * with the M_AMPDU_MPDU flag and we can bypass most of
427 * the normal processing.
428 */
429 wh = mtod(m, struct ieee80211_frame *);
430 type = IEEE80211_FC0_TYPE_DATA;
431 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
432 subtype = IEEE80211_FC0_SUBTYPE_QOS;
433 hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */
434 goto resubmit_ampdu;
435 }
436
437 KASSERT(ni != NULL, ("null node"));
438
439 type = -1; /* undefined */
440
441 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
442 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
443 ni->ni_macaddr, NULL,
444 "too short (1): len %u", m->m_pkthdr.len);
445 vap->iv_stats.is_rx_tooshort++;
446 goto out;
447 }
448 /*
449 * Bit of a cheat here, we use a pointer for a 3-address
450 * frame format but don't reference fields past outside
451 * ieee80211_frame_min w/o first validating the data is
452 * present.
453 */
454 wh = mtod(m, struct ieee80211_frame *);
455
456 if (!IEEE80211_IS_MULTICAST(wh->i_addr1))
457 ni->ni_inact = ni->ni_inact_reload;
458
459 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
460 IEEE80211_FC0_VERSION_0) {
461 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
462 ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x",
463 wh->i_fc[0], wh->i_fc[1]);
464 vap->iv_stats.is_rx_badversion++;
465 goto err;
466 }
467
468 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
469 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
470 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
471
472 /* NB: WDS vap's do not scan */
473 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_addr4)) {
474 IEEE80211_DISCARD_MAC(vap,
475 IEEE80211_MSG_ANY, ni->ni_macaddr, NULL,
476 "too short (3): len %u", m->m_pkthdr.len);
477 vap->iv_stats.is_rx_tooshort++;
478 goto out;
479 }
480 /* NB: the TA is implicitly verified by finding the wds peer node */
481 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr) &&
482 !IEEE80211_ADDR_EQ(wh->i_addr1, ifp->if_broadcastaddr)) {
483 /* not interested in */
484 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
485 wh->i_addr1, NULL, "%s", "not to bss");
486 vap->iv_stats.is_rx_wrongbss++;
487 goto out;
488 }
489 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
490 ni->ni_noise = nf;
| 409 struct ieee80211vap *vap = ni->ni_vap;
410 struct ieee80211com *ic = ni->ni_ic;
411 struct ifnet *ifp = vap->iv_ifp;
412 struct ieee80211_frame *wh;
413 struct ieee80211_key *key;
414 struct ether_header *eh;
415 int hdrspace, need_tap = 1; /* mbuf need to be tapped. */
416 uint8_t dir, type, subtype, qos;
417 uint16_t rxseq;
418
419 if (m->m_flags & M_AMPDU_MPDU) {
420 /*
421 * Fastpath for A-MPDU reorder q resubmission. Frames
422 * w/ M_AMPDU_MPDU marked have already passed through
423 * here but were received out of order and been held on
424 * the reorder queue. When resubmitted they are marked
425 * with the M_AMPDU_MPDU flag and we can bypass most of
426 * the normal processing.
427 */
428 wh = mtod(m, struct ieee80211_frame *);
429 type = IEEE80211_FC0_TYPE_DATA;
430 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
431 subtype = IEEE80211_FC0_SUBTYPE_QOS;
432 hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */
433 goto resubmit_ampdu;
434 }
435
436 KASSERT(ni != NULL, ("null node"));
437
438 type = -1; /* undefined */
439
440 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
441 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
442 ni->ni_macaddr, NULL,
443 "too short (1): len %u", m->m_pkthdr.len);
444 vap->iv_stats.is_rx_tooshort++;
445 goto out;
446 }
447 /*
448 * Bit of a cheat here, we use a pointer for a 3-address
449 * frame format but don't reference fields past outside
450 * ieee80211_frame_min w/o first validating the data is
451 * present.
452 */
453 wh = mtod(m, struct ieee80211_frame *);
454
455 if (!IEEE80211_IS_MULTICAST(wh->i_addr1))
456 ni->ni_inact = ni->ni_inact_reload;
457
458 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
459 IEEE80211_FC0_VERSION_0) {
460 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
461 ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x",
462 wh->i_fc[0], wh->i_fc[1]);
463 vap->iv_stats.is_rx_badversion++;
464 goto err;
465 }
466
467 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
468 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
469 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
470
471 /* NB: WDS vap's do not scan */
472 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_addr4)) {
473 IEEE80211_DISCARD_MAC(vap,
474 IEEE80211_MSG_ANY, ni->ni_macaddr, NULL,
475 "too short (3): len %u", m->m_pkthdr.len);
476 vap->iv_stats.is_rx_tooshort++;
477 goto out;
478 }
479 /* NB: the TA is implicitly verified by finding the wds peer node */
480 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr) &&
481 !IEEE80211_ADDR_EQ(wh->i_addr1, ifp->if_broadcastaddr)) {
482 /* not interested in */
483 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
484 wh->i_addr1, NULL, "%s", "not to bss");
485 vap->iv_stats.is_rx_wrongbss++;
486 goto out;
487 }
488 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
489 ni->ni_noise = nf;
|
491 if (HAS_SEQ(type)) {
| 490 if (IEEE80211_HAS_SEQ(type, subtype)) {
|
492 uint8_t tid = ieee80211_gettid(wh);
493 if (IEEE80211_QOS_HAS_SEQ(wh) &&
494 TID_TO_WME_AC(tid) >= WME_AC_VI)
495 ic->ic_wme.wme_hipri_traffic++;
496 rxseq = le16toh(*(uint16_t *)wh->i_seq);
497 if (! ieee80211_check_rxseq(ni, wh)) {
498 /* duplicate, discard */
499 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
500 wh->i_addr1, "duplicate",
501 "seqno <%u,%u> fragno <%u,%u> tid %u",
502 rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
503 ni->ni_rxseqs[tid] >> IEEE80211_SEQ_SEQ_SHIFT,
504 rxseq & IEEE80211_SEQ_FRAG_MASK,
505 ni->ni_rxseqs[tid] & IEEE80211_SEQ_FRAG_MASK,
506 tid);
507 vap->iv_stats.is_rx_dup++;
508 IEEE80211_NODE_STAT(ni, rx_dup);
509 goto out;
510 }
511 ni->ni_rxseqs[tid] = rxseq;
512 }
513 switch (type) {
514 case IEEE80211_FC0_TYPE_DATA:
515 hdrspace = ieee80211_hdrspace(ic, wh);
516 if (m->m_len < hdrspace &&
517 (m = m_pullup(m, hdrspace)) == NULL) {
518 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
519 ni->ni_macaddr, NULL,
520 "data too short: expecting %u", hdrspace);
521 vap->iv_stats.is_rx_tooshort++;
522 goto out; /* XXX */
523 }
524 if (dir != IEEE80211_FC1_DIR_DSTODS) {
525 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
526 wh, "data", "incorrect dir 0x%x", dir);
527 vap->iv_stats.is_rx_wrongdir++;
528 goto out;
529 }
530 /*
531 * Only legacy WDS traffic should take this path.
532 */
533 if ((vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) {
534 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
535 wh, "data", "%s", "not legacy wds");
536 vap->iv_stats.is_rx_wrongdir++;/*XXX*/
537 goto out;
538 }
539 /*
540 * Handle A-MPDU re-ordering. If the frame is to be
541 * processed directly then ieee80211_ampdu_reorder
542 * will return 0; otherwise it has consumed the mbuf
543 * and we should do nothing more with it.
544 */
545 if ((m->m_flags & M_AMPDU) &&
546 ieee80211_ampdu_reorder(ni, m) != 0) {
547 m = NULL;
548 goto out;
549 }
550 resubmit_ampdu:
551
552 /*
553 * Handle privacy requirements. Note that we
554 * must not be preempted from here until after
555 * we (potentially) call ieee80211_crypto_demic;
556 * otherwise we may violate assumptions in the
557 * crypto cipher modules used to do delayed update
558 * of replay sequence numbers.
559 */
560 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
561 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
562 /*
563 * Discard encrypted frames when privacy is off.
564 */
565 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
566 wh, "WEP", "%s", "PRIVACY off");
567 vap->iv_stats.is_rx_noprivacy++;
568 IEEE80211_NODE_STAT(ni, rx_noprivacy);
569 goto out;
570 }
571 key = ieee80211_crypto_decap(ni, m, hdrspace);
572 if (key == NULL) {
573 /* NB: stats+msgs handled in crypto_decap */
574 IEEE80211_NODE_STAT(ni, rx_wepfail);
575 goto out;
576 }
577 wh = mtod(m, struct ieee80211_frame *);
578 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED;
579 } else {
580 /* XXX M_WEP and IEEE80211_F_PRIVACY */
581 key = NULL;
582 }
583
584 /*
585 * Save QoS bits for use below--before we strip the header.
586 */
587 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) {
588 qos = (dir == IEEE80211_FC1_DIR_DSTODS) ?
589 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] :
590 ((struct ieee80211_qosframe *)wh)->i_qos[0];
591 } else
592 qos = 0;
593
594 /*
595 * Next up, any fragmentation.
596 */
597 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
598 m = ieee80211_defrag(ni, m, hdrspace);
599 if (m == NULL) {
600 /* Fragment dropped or frame not complete yet */
601 goto out;
602 }
603 }
604 wh = NULL; /* no longer valid, catch any uses */
605
606 /*
607 * Next strip any MSDU crypto bits.
608 */
609 if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) {
610 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
611 ni->ni_macaddr, "data", "%s", "demic error");
612 vap->iv_stats.is_rx_demicfail++;
613 IEEE80211_NODE_STAT(ni, rx_demicfail);
614 goto out;
615 }
616
617 /* copy to listener after decrypt */
618 if (ieee80211_radiotap_active_vap(vap))
619 ieee80211_radiotap_rx(vap, m);
620 need_tap = 0;
621
622 /*
623 * Finally, strip the 802.11 header.
624 */
625 m = ieee80211_decap(vap, m, hdrspace);
626 if (m == NULL) {
627 /* XXX mask bit to check for both */
628 /* don't count Null data frames as errors */
629 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
630 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
631 goto out;
632 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
633 ni->ni_macaddr, "data", "%s", "decap error");
634 vap->iv_stats.is_rx_decap++;
635 IEEE80211_NODE_STAT(ni, rx_decap);
636 goto err;
637 }
638 eh = mtod(m, struct ether_header *);
639 if (!ieee80211_node_is_authorized(ni)) {
640 /*
641 * Deny any non-PAE frames received prior to
642 * authorization. For open/shared-key
643 * authentication the port is mark authorized
644 * after authentication completes. For 802.1x
645 * the port is not marked authorized by the
646 * authenticator until the handshake has completed.
647 */
648 if (eh->ether_type != htons(ETHERTYPE_PAE)) {
649 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
650 eh->ether_shost, "data",
651 "unauthorized port: ether type 0x%x len %u",
652 eh->ether_type, m->m_pkthdr.len);
653 vap->iv_stats.is_rx_unauth++;
654 IEEE80211_NODE_STAT(ni, rx_unauth);
655 goto err;
656 }
657 } else {
658 /*
659 * When denying unencrypted frames, discard
660 * any non-PAE frames received without encryption.
661 */
662 if ((vap->iv_flags & IEEE80211_F_DROPUNENC) &&
663 (key == NULL && (m->m_flags & M_WEP) == 0) &&
664 eh->ether_type != htons(ETHERTYPE_PAE)) {
665 /*
666 * Drop unencrypted frames.
667 */
668 vap->iv_stats.is_rx_unencrypted++;
669 IEEE80211_NODE_STAT(ni, rx_unencrypted);
670 goto out;
671 }
672 }
673 /* XXX require HT? */
674 if (qos & IEEE80211_QOS_AMSDU) {
675 m = ieee80211_decap_amsdu(ni, m);
676 if (m == NULL)
677 return IEEE80211_FC0_TYPE_DATA;
678 } else {
679#ifdef IEEE80211_SUPPORT_SUPERG
680 m = ieee80211_decap_fastframe(vap, ni, m);
681 if (m == NULL)
682 return IEEE80211_FC0_TYPE_DATA;
683#endif
684 }
685 ieee80211_deliver_data(vap, ni, m);
686 return IEEE80211_FC0_TYPE_DATA;
687
688 case IEEE80211_FC0_TYPE_MGT:
689 vap->iv_stats.is_rx_mgmt++;
690 IEEE80211_NODE_STAT(ni, rx_mgmt);
691 if (dir != IEEE80211_FC1_DIR_NODS) {
692 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
693 wh, "data", "incorrect dir 0x%x", dir);
694 vap->iv_stats.is_rx_wrongdir++;
695 goto err;
696 }
697 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
698 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
699 ni->ni_macaddr, "mgt", "too short: len %u",
700 m->m_pkthdr.len);
701 vap->iv_stats.is_rx_tooshort++;
702 goto out;
703 }
704#ifdef IEEE80211_DEBUG
705 if (ieee80211_msg_debug(vap) || ieee80211_msg_dumppkts(vap)) {
706 if_printf(ifp, "received %s from %s rssi %d\n",
707 ieee80211_mgt_subtype_name[subtype >>
708 IEEE80211_FC0_SUBTYPE_SHIFT],
709 ether_sprintf(wh->i_addr2), rssi);
710 }
711#endif
712 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
713 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
714 wh, NULL, "%s", "WEP set but not permitted");
715 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
716 goto out;
717 }
718 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf);
719 goto out;
720
721 case IEEE80211_FC0_TYPE_CTL:
722 vap->iv_stats.is_rx_ctl++;
723 IEEE80211_NODE_STAT(ni, rx_ctrl);
724 goto out;
725
726 default:
727 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
728 wh, "bad", "frame type 0x%x", type);
729 /* should not come here */
730 break;
731 }
732err:
733 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
734out:
735 if (m != NULL) {
736 if (need_tap && ieee80211_radiotap_active_vap(vap))
737 ieee80211_radiotap_rx(vap, m);
738 m_freem(m);
739 }
740 return type;
741}
742
743static void
744wds_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0,
745 int subtype, int rssi, int nf)
746{
747 struct ieee80211vap *vap = ni->ni_vap;
748 struct ieee80211com *ic = ni->ni_ic;
749 struct ieee80211_frame *wh;
750 u_int8_t *frm, *efrm;
751
752 wh = mtod(m0, struct ieee80211_frame *);
753 frm = (u_int8_t *)&wh[1];
754 efrm = mtod(m0, u_int8_t *) + m0->m_len;
755 switch (subtype) {
756 case IEEE80211_FC0_SUBTYPE_ACTION:
757 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
758 if (ni == vap->iv_bss) {
759 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
760 wh, NULL, "%s", "unknown node");
761 vap->iv_stats.is_rx_mgtdiscard++;
762 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1)) {
763 /* NB: not interested in multicast frames. */
764 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
765 wh, NULL, "%s", "not for us");
766 vap->iv_stats.is_rx_mgtdiscard++;
767 } else if (vap->iv_state != IEEE80211_S_RUN) {
768 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
769 wh, NULL, "wrong state %s",
770 ieee80211_state_name[vap->iv_state]);
771 vap->iv_stats.is_rx_mgtdiscard++;
772 } else {
773 if (ieee80211_parse_action(ni, m0) == 0)
774 (void)ic->ic_recv_action(ni, wh, frm, efrm);
775 }
776 break;
777
778 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
779 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
780 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
781 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
782 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
783 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
784 case IEEE80211_FC0_SUBTYPE_BEACON:
785 case IEEE80211_FC0_SUBTYPE_ATIM:
786 case IEEE80211_FC0_SUBTYPE_DISASSOC:
787 case IEEE80211_FC0_SUBTYPE_AUTH:
788 case IEEE80211_FC0_SUBTYPE_DEAUTH:
789 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
790 wh, NULL, "%s", "not handled");
791 vap->iv_stats.is_rx_mgtdiscard++;
792 break;
793
794 default:
795 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
796 wh, "mgt", "subtype 0x%x not handled", subtype);
797 vap->iv_stats.is_rx_badsubtype++;
798 break;
799 }
800}
| 491 uint8_t tid = ieee80211_gettid(wh);
492 if (IEEE80211_QOS_HAS_SEQ(wh) &&
493 TID_TO_WME_AC(tid) >= WME_AC_VI)
494 ic->ic_wme.wme_hipri_traffic++;
495 rxseq = le16toh(*(uint16_t *)wh->i_seq);
496 if (! ieee80211_check_rxseq(ni, wh)) {
497 /* duplicate, discard */
498 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
499 wh->i_addr1, "duplicate",
500 "seqno <%u,%u> fragno <%u,%u> tid %u",
501 rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
502 ni->ni_rxseqs[tid] >> IEEE80211_SEQ_SEQ_SHIFT,
503 rxseq & IEEE80211_SEQ_FRAG_MASK,
504 ni->ni_rxseqs[tid] & IEEE80211_SEQ_FRAG_MASK,
505 tid);
506 vap->iv_stats.is_rx_dup++;
507 IEEE80211_NODE_STAT(ni, rx_dup);
508 goto out;
509 }
510 ni->ni_rxseqs[tid] = rxseq;
511 }
512 switch (type) {
513 case IEEE80211_FC0_TYPE_DATA:
514 hdrspace = ieee80211_hdrspace(ic, wh);
515 if (m->m_len < hdrspace &&
516 (m = m_pullup(m, hdrspace)) == NULL) {
517 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
518 ni->ni_macaddr, NULL,
519 "data too short: expecting %u", hdrspace);
520 vap->iv_stats.is_rx_tooshort++;
521 goto out; /* XXX */
522 }
523 if (dir != IEEE80211_FC1_DIR_DSTODS) {
524 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
525 wh, "data", "incorrect dir 0x%x", dir);
526 vap->iv_stats.is_rx_wrongdir++;
527 goto out;
528 }
529 /*
530 * Only legacy WDS traffic should take this path.
531 */
532 if ((vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) {
533 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
534 wh, "data", "%s", "not legacy wds");
535 vap->iv_stats.is_rx_wrongdir++;/*XXX*/
536 goto out;
537 }
538 /*
539 * Handle A-MPDU re-ordering. If the frame is to be
540 * processed directly then ieee80211_ampdu_reorder
541 * will return 0; otherwise it has consumed the mbuf
542 * and we should do nothing more with it.
543 */
544 if ((m->m_flags & M_AMPDU) &&
545 ieee80211_ampdu_reorder(ni, m) != 0) {
546 m = NULL;
547 goto out;
548 }
549 resubmit_ampdu:
550
551 /*
552 * Handle privacy requirements. Note that we
553 * must not be preempted from here until after
554 * we (potentially) call ieee80211_crypto_demic;
555 * otherwise we may violate assumptions in the
556 * crypto cipher modules used to do delayed update
557 * of replay sequence numbers.
558 */
559 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
560 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
561 /*
562 * Discard encrypted frames when privacy is off.
563 */
564 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
565 wh, "WEP", "%s", "PRIVACY off");
566 vap->iv_stats.is_rx_noprivacy++;
567 IEEE80211_NODE_STAT(ni, rx_noprivacy);
568 goto out;
569 }
570 key = ieee80211_crypto_decap(ni, m, hdrspace);
571 if (key == NULL) {
572 /* NB: stats+msgs handled in crypto_decap */
573 IEEE80211_NODE_STAT(ni, rx_wepfail);
574 goto out;
575 }
576 wh = mtod(m, struct ieee80211_frame *);
577 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED;
578 } else {
579 /* XXX M_WEP and IEEE80211_F_PRIVACY */
580 key = NULL;
581 }
582
583 /*
584 * Save QoS bits for use below--before we strip the header.
585 */
586 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) {
587 qos = (dir == IEEE80211_FC1_DIR_DSTODS) ?
588 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] :
589 ((struct ieee80211_qosframe *)wh)->i_qos[0];
590 } else
591 qos = 0;
592
593 /*
594 * Next up, any fragmentation.
595 */
596 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
597 m = ieee80211_defrag(ni, m, hdrspace);
598 if (m == NULL) {
599 /* Fragment dropped or frame not complete yet */
600 goto out;
601 }
602 }
603 wh = NULL; /* no longer valid, catch any uses */
604
605 /*
606 * Next strip any MSDU crypto bits.
607 */
608 if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) {
609 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
610 ni->ni_macaddr, "data", "%s", "demic error");
611 vap->iv_stats.is_rx_demicfail++;
612 IEEE80211_NODE_STAT(ni, rx_demicfail);
613 goto out;
614 }
615
616 /* copy to listener after decrypt */
617 if (ieee80211_radiotap_active_vap(vap))
618 ieee80211_radiotap_rx(vap, m);
619 need_tap = 0;
620
621 /*
622 * Finally, strip the 802.11 header.
623 */
624 m = ieee80211_decap(vap, m, hdrspace);
625 if (m == NULL) {
626 /* XXX mask bit to check for both */
627 /* don't count Null data frames as errors */
628 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
629 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
630 goto out;
631 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
632 ni->ni_macaddr, "data", "%s", "decap error");
633 vap->iv_stats.is_rx_decap++;
634 IEEE80211_NODE_STAT(ni, rx_decap);
635 goto err;
636 }
637 eh = mtod(m, struct ether_header *);
638 if (!ieee80211_node_is_authorized(ni)) {
639 /*
640 * Deny any non-PAE frames received prior to
641 * authorization. For open/shared-key
642 * authentication the port is mark authorized
643 * after authentication completes. For 802.1x
644 * the port is not marked authorized by the
645 * authenticator until the handshake has completed.
646 */
647 if (eh->ether_type != htons(ETHERTYPE_PAE)) {
648 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
649 eh->ether_shost, "data",
650 "unauthorized port: ether type 0x%x len %u",
651 eh->ether_type, m->m_pkthdr.len);
652 vap->iv_stats.is_rx_unauth++;
653 IEEE80211_NODE_STAT(ni, rx_unauth);
654 goto err;
655 }
656 } else {
657 /*
658 * When denying unencrypted frames, discard
659 * any non-PAE frames received without encryption.
660 */
661 if ((vap->iv_flags & IEEE80211_F_DROPUNENC) &&
662 (key == NULL && (m->m_flags & M_WEP) == 0) &&
663 eh->ether_type != htons(ETHERTYPE_PAE)) {
664 /*
665 * Drop unencrypted frames.
666 */
667 vap->iv_stats.is_rx_unencrypted++;
668 IEEE80211_NODE_STAT(ni, rx_unencrypted);
669 goto out;
670 }
671 }
672 /* XXX require HT? */
673 if (qos & IEEE80211_QOS_AMSDU) {
674 m = ieee80211_decap_amsdu(ni, m);
675 if (m == NULL)
676 return IEEE80211_FC0_TYPE_DATA;
677 } else {
678#ifdef IEEE80211_SUPPORT_SUPERG
679 m = ieee80211_decap_fastframe(vap, ni, m);
680 if (m == NULL)
681 return IEEE80211_FC0_TYPE_DATA;
682#endif
683 }
684 ieee80211_deliver_data(vap, ni, m);
685 return IEEE80211_FC0_TYPE_DATA;
686
687 case IEEE80211_FC0_TYPE_MGT:
688 vap->iv_stats.is_rx_mgmt++;
689 IEEE80211_NODE_STAT(ni, rx_mgmt);
690 if (dir != IEEE80211_FC1_DIR_NODS) {
691 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
692 wh, "data", "incorrect dir 0x%x", dir);
693 vap->iv_stats.is_rx_wrongdir++;
694 goto err;
695 }
696 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
697 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
698 ni->ni_macaddr, "mgt", "too short: len %u",
699 m->m_pkthdr.len);
700 vap->iv_stats.is_rx_tooshort++;
701 goto out;
702 }
703#ifdef IEEE80211_DEBUG
704 if (ieee80211_msg_debug(vap) || ieee80211_msg_dumppkts(vap)) {
705 if_printf(ifp, "received %s from %s rssi %d\n",
706 ieee80211_mgt_subtype_name[subtype >>
707 IEEE80211_FC0_SUBTYPE_SHIFT],
708 ether_sprintf(wh->i_addr2), rssi);
709 }
710#endif
711 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
712 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
713 wh, NULL, "%s", "WEP set but not permitted");
714 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
715 goto out;
716 }
717 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf);
718 goto out;
719
720 case IEEE80211_FC0_TYPE_CTL:
721 vap->iv_stats.is_rx_ctl++;
722 IEEE80211_NODE_STAT(ni, rx_ctrl);
723 goto out;
724
725 default:
726 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
727 wh, "bad", "frame type 0x%x", type);
728 /* should not come here */
729 break;
730 }
731err:
732 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
733out:
734 if (m != NULL) {
735 if (need_tap && ieee80211_radiotap_active_vap(vap))
736 ieee80211_radiotap_rx(vap, m);
737 m_freem(m);
738 }
739 return type;
740}
741
742static void
743wds_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0,
744 int subtype, int rssi, int nf)
745{
746 struct ieee80211vap *vap = ni->ni_vap;
747 struct ieee80211com *ic = ni->ni_ic;
748 struct ieee80211_frame *wh;
749 u_int8_t *frm, *efrm;
750
751 wh = mtod(m0, struct ieee80211_frame *);
752 frm = (u_int8_t *)&wh[1];
753 efrm = mtod(m0, u_int8_t *) + m0->m_len;
754 switch (subtype) {
755 case IEEE80211_FC0_SUBTYPE_ACTION:
756 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
757 if (ni == vap->iv_bss) {
758 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
759 wh, NULL, "%s", "unknown node");
760 vap->iv_stats.is_rx_mgtdiscard++;
761 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1)) {
762 /* NB: not interested in multicast frames. */
763 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
764 wh, NULL, "%s", "not for us");
765 vap->iv_stats.is_rx_mgtdiscard++;
766 } else if (vap->iv_state != IEEE80211_S_RUN) {
767 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
768 wh, NULL, "wrong state %s",
769 ieee80211_state_name[vap->iv_state]);
770 vap->iv_stats.is_rx_mgtdiscard++;
771 } else {
772 if (ieee80211_parse_action(ni, m0) == 0)
773 (void)ic->ic_recv_action(ni, wh, frm, efrm);
774 }
775 break;
776
777 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
778 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
779 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
780 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
781 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
782 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
783 case IEEE80211_FC0_SUBTYPE_BEACON:
784 case IEEE80211_FC0_SUBTYPE_ATIM:
785 case IEEE80211_FC0_SUBTYPE_DISASSOC:
786 case IEEE80211_FC0_SUBTYPE_AUTH:
787 case IEEE80211_FC0_SUBTYPE_DEAUTH:
788 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
789 wh, NULL, "%s", "not handled");
790 vap->iv_stats.is_rx_mgtdiscard++;
791 break;
792
793 default:
794 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
795 wh, "mgt", "subtype 0x%x not handled", subtype);
796 vap->iv_stats.is_rx_badsubtype++;
797 break;
798 }
799}
|