aboutsummaryrefslogtreecommitdiffstats
path: root/wlantest/rx_data.c
blob: d23425e4ad444cf90a6e3f17b64923ef621bb43b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
/*
 * Received Data frame processing
 * Copyright (c) 2010, Jouni Malinen <j@w1.fi>
 *
 * This software may be distributed under the terms of the BSD license.
 * See README for more details.
 */

#include "utils/includes.h"
#include <linux/if_ether.h>

#include "utils/common.h"
#include "common/defs.h"
#include "common/ieee802_11_defs.h"
#include "wlantest.h"

extern int wpa_debug_level;


static const char * data_stype(u16 stype)
{
	switch (stype) {
	case WLAN_FC_STYPE_DATA:
		return "DATA";
	case WLAN_FC_STYPE_DATA_CFACK:
		return "DATA-CFACK";
	case WLAN_FC_STYPE_DATA_CFPOLL:
		return "DATA-CFPOLL";
	case WLAN_FC_STYPE_DATA_CFACKPOLL:
		return "DATA-CFACKPOLL";
	case WLAN_FC_STYPE_NULLFUNC:
		return "NULLFUNC";
	case WLAN_FC_STYPE_CFACK:
		return "CFACK";
	case WLAN_FC_STYPE_CFPOLL:
		return "CFPOLL";
	case WLAN_FC_STYPE_CFACKPOLL:
		return "CFACKPOLL";
	case WLAN_FC_STYPE_QOS_DATA:
		return "QOSDATA";
	case WLAN_FC_STYPE_QOS_DATA_CFACK:
		return "QOSDATA-CFACK";
	case WLAN_FC_STYPE_QOS_DATA_CFPOLL:
		return "QOSDATA-CFPOLL";
	case WLAN_FC_STYPE_QOS_DATA_CFACKPOLL:
		return "QOSDATA-CFACKPOLL";
	case WLAN_FC_STYPE_QOS_NULL:
		return "QOS-NULL";
	case WLAN_FC_STYPE_QOS_CFPOLL:
		return "QOS-CFPOLL";
	case WLAN_FC_STYPE_QOS_CFACKPOLL:
		return "QOS-CFACKPOLL";
	}
	return "??";
}


static void rx_data_eth(struct wlantest *wt, const u8 *bssid,
			const u8 *sta_addr, const u8 *dst, const u8 *src,
			u16 ethertype, const u8 *data, size_t len, int prot,
			const u8 *peer_addr)
{
	switch (ethertype) {
	case ETH_P_PAE:
		rx_data_eapol(wt, dst, src, data, len, prot);
		break;
	case ETH_P_IP:
		rx_data_ip(wt, bssid, sta_addr, dst, src, data, len,
			   peer_addr);
		break;
	case 0x890d:
		rx_data_80211_encap(wt, bssid, sta_addr, dst, src, data, len);
		break;
	}
}


static void rx_data_process(struct wlantest *wt, const u8 *bssid,
			    const u8 *sta_addr,
			    const u8 *dst, const u8 *src,
			    const u8 *data, size_t len, int prot,
			    const u8 *peer_addr)
{
	if (len == 0)
		return;

	if (len >= 8 && os_memcmp(data, "\xaa\xaa\x03\x00\x00\x00", 6) == 0) {
		rx_data_eth(wt, bssid, sta_addr, dst, src,
			    WPA_GET_BE16(data + 6), data + 8, len - 8, prot,
			    peer_addr);
		return;
	}

	wpa_hexdump(MSG_DEBUG, "Unrecognized LLC", data, len > 8 ? 8 : len);
}


static u8 * try_all_ptk(struct wlantest *wt, int pairwise_cipher,
			const struct ieee80211_hdr *hdr,
			const u8 *data, size_t data_len, size_t *decrypted_len)
{
	struct wlantest_ptk *ptk;
	u8 *decrypted;
	int prev_level = wpa_debug_level;

	wpa_debug_level = MSG_WARNING;
	dl_list_for_each(ptk, &wt->ptk, struct wlantest_ptk, list) {
		decrypted = NULL;
		if ((pairwise_cipher == WPA_CIPHER_CCMP ||
		     pairwise_cipher == 0) && ptk->ptk_len == 48) {
			decrypted = ccmp_decrypt(ptk->ptk.tk1, hdr, data,
						 data_len, decrypted_len);
		}
		if ((pairwise_cipher == WPA_CIPHER_TKIP ||
		     pairwise_cipher == 0) && ptk->ptk_len == 64) {
			decrypted = tkip_decrypt(ptk->ptk.tk1, hdr, data,
						 data_len, decrypted_len);
		}
		if (decrypted) {
			wpa_debug_level = prev_level;
			add_note(wt, MSG_DEBUG, "Found PTK match from list of all known PTKs");
			return decrypted;
		}
	}
	wpa_debug_level = prev_level;

	return NULL;
}


static void rx_data_bss_prot_group(struct wlantest *wt,
				   const struct ieee80211_hdr *hdr,
				   const u8 *qos, const u8 *dst, const u8 *src,
				   const u8 *data, size_t len)
{
	struct wlantest_bss *bss;
	int keyid;
	u8 *decrypted;
	size_t dlen;
	u8 pn[6];

	bss = bss_get(wt, hdr->addr2);
	if (bss == NULL)
		return;
	if (len < 4) {
		add_note(wt, MSG_INFO, "Too short group addressed data frame");
		return;
	}

	if (bss->group_cipher & (WPA_CIPHER_TKIP | WPA_CIPHER_CCMP) &&
	    !(data[3] & 0x20)) {
		add_note(wt, MSG_INFO, "Expected TKIP/CCMP frame from "
			 MACSTR " did not have ExtIV bit set to 1",
			 MAC2STR(bss->bssid));
		return;
	}

	if (bss->group_cipher == WPA_CIPHER_TKIP) {
		if (data[3] & 0x1f) {
			add_note(wt, MSG_INFO, "TKIP frame from " MACSTR
				 " used non-zero reserved bit",
				 MAC2STR(bss->bssid));
		}
		if (data[1] != ((data[0] | 0x20) & 0x7f)) {
			add_note(wt, MSG_INFO, "TKIP frame from " MACSTR
				 " used incorrect WEPSeed[1] (was 0x%x, "
				 "expected 0x%x)",
				 MAC2STR(bss->bssid), data[1],
				 (data[0] | 0x20) & 0x7f);
		}
	} else if (bss->group_cipher == WPA_CIPHER_CCMP) {
		if (data[2] != 0 || (data[3] & 0x1f) != 0) {
			add_note(wt, MSG_INFO, "CCMP frame from " MACSTR
				 " used non-zero reserved bit",
				 MAC2STR(bss->bssid));
		}
	}

	keyid = data[3] >> 6;
	if (bss->gtk_len[keyid] == 0 && bss->group_cipher != WPA_CIPHER_WEP40)
	{
		add_note(wt, MSG_MSGDUMP, "No GTK known to decrypt the frame "
			 "(A2=" MACSTR " KeyID=%d)",
			 MAC2STR(hdr->addr2), keyid);
		return;
	}

	if (bss->group_cipher == WPA_CIPHER_TKIP)
		tkip_get_pn(pn, data);
	else if (bss->group_cipher == WPA_CIPHER_WEP40)
		goto skip_replay_det;
	else
		ccmp_get_pn(pn, data);
	if (os_memcmp(pn, bss->rsc[keyid], 6) <= 0) {
		u16 seq_ctrl = le_to_host16(hdr->seq_ctrl);
		add_note(wt, MSG_INFO, "CCMP/TKIP replay detected: A1=" MACSTR
			 " A2=" MACSTR " A3=" MACSTR " seq=%u frag=%u",
			 MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
			 MAC2STR(hdr->addr3),
			 WLAN_GET_SEQ_SEQ(seq_ctrl),
			 WLAN_GET_SEQ_FRAG(seq_ctrl));
		wpa_hexdump(MSG_INFO, "RX PN", pn, 6);
		wpa_hexdump(MSG_INFO, "RSC", bss->rsc[keyid], 6);
	}

skip_replay_det:
	if (bss->group_cipher == WPA_CIPHER_TKIP)
		decrypted = tkip_decrypt(bss->gtk[keyid], hdr, data, len,
					 &dlen);
	else if (bss->group_cipher == WPA_CIPHER_WEP40)
		decrypted = wep_decrypt(wt, hdr, data, len, &dlen);
	else
		decrypted = ccmp_decrypt(bss->gtk[keyid], hdr, data, len,
					 &dlen);
	if (decrypted) {
		rx_data_process(wt, bss->bssid, NULL, dst, src, decrypted,
				dlen, 1, NULL);
		os_memcpy(bss->rsc[keyid], pn, 6);
		write_pcap_decrypted(wt, (const u8 *) hdr, 24 + (qos ? 2 : 0),
				     decrypted, dlen);
	} else
		add_note(wt, MSG_DEBUG, "Failed to decrypt frame");
	os_free(decrypted);
}


static void rx_data_bss_prot(struct wlantest *wt,
			     const struct ieee80211_hdr *hdr, const u8 *qos,
			     const u8 *dst, const u8 *src, const u8 *data,
			     size_t len)
{
	struct wlantest_bss *bss;
	struct wlantest_sta *sta, *sta2;
	int keyid;
	u16 fc = le_to_host16(hdr->frame_control);
	u8 *decrypted;
	size_t dlen;
	int tid;
	u8 pn[6], *rsc;
	struct wlantest_tdls *tdls = NULL, *found;
	const u8 *tk = NULL;
	int ptk_iter_done = 0;
	int try_ptk_iter = 0;

	if (hdr->addr1[0] & 0x01) {
		rx_data_bss_prot_group(wt, hdr, qos, dst, src, data, len);
		return;
	}

	if (fc & WLAN_FC_TODS) {
		bss = bss_get(wt, hdr->addr1);
		if (bss == NULL)
			return;
		sta = sta_get(bss, hdr->addr2);
		if (sta)
			sta->counters[WLANTEST_STA_COUNTER_PROT_DATA_TX]++;
	} else if (fc & WLAN_FC_FROMDS) {
		bss = bss_get(wt, hdr->addr2);
		if (bss == NULL)
			return;
		sta = sta_get(bss, hdr->addr1);
	} else {
		bss = bss_get(wt, hdr->addr3);
		if (bss == NULL)
			return;
		sta = sta_find(bss, hdr->addr2);
		sta2 = sta_find(bss, hdr->addr1);
		if (sta == NULL || sta2 == NULL)
			return;
		found = NULL;
		dl_list_for_each(tdls, &bss->tdls, struct wlantest_tdls, list)
		{
			if ((tdls->init == sta && tdls->resp == sta2) ||
			    (tdls->init == sta2 && tdls->resp == sta)) {
				found = tdls;
				if (tdls->link_up)
					break;
			}
		}
		if (found) {
			if (!found->link_up)
				add_note(wt, MSG_DEBUG,
					 "TDLS: Link not up, but Data "
					 "frame seen");
			tk = found->tpk.tk;
			tdls = found;
		}
	}
	if ((sta == NULL ||
	     (!sta->ptk_set && sta->pairwise_cipher != WPA_CIPHER_WEP40)) &&
	    tk == NULL) {
		add_note(wt, MSG_MSGDUMP, "No PTK known to decrypt the frame");
		if (dl_list_empty(&wt->ptk))
			return;
		try_ptk_iter = 1;
	}

	if (len < 4) {
		add_note(wt, MSG_INFO, "Too short encrypted data frame");
		return;
	}

	if (sta == NULL)
		return;
	if (sta->pairwise_cipher & (WPA_CIPHER_TKIP | WPA_CIPHER_CCMP) &&
	    !(data[3] & 0x20)) {
		add_note(wt, MSG_INFO, "Expected TKIP/CCMP frame from "
			 MACSTR " did not have ExtIV bit set to 1",
			 MAC2STR(src));
		return;
	}

	if (tk == NULL && sta->pairwise_cipher == WPA_CIPHER_TKIP) {
		if (data[3] & 0x1f) {
			add_note(wt, MSG_INFO, "TKIP frame from " MACSTR
				 " used non-zero reserved bit",
				 MAC2STR(hdr->addr2));
		}
		if (data[1] != ((data[0] | 0x20) & 0x7f)) {
			add_note(wt, MSG_INFO, "TKIP frame from " MACSTR
				 " used incorrect WEPSeed[1] (was 0x%x, "
				 "expected 0x%x)",
				 MAC2STR(hdr->addr2), data[1],
				 (data[0] | 0x20) & 0x7f);
		}
	} else if (tk || sta->pairwise_cipher == WPA_CIPHER_CCMP) {
		if (data[2] != 0 || (data[3] & 0x1f) != 0) {
			add_note(wt, MSG_INFO, "CCMP frame from " MACSTR
				 " used non-zero reserved bit",
				 MAC2STR(hdr->addr2));
		}
	}

	keyid = data[3] >> 6;
	if (keyid != 0) {
		add_note(wt, MSG_INFO, "Unexpected non-zero KeyID %d in "
			 "individually addressed Data frame from " MACSTR,
			 keyid, MAC2STR(hdr->addr2));
	}

	if (qos) {
		tid = qos[0] & 0x0f;
		if (fc & WLAN_FC_TODS)
			sta->tx_tid[tid]++;
		else
			sta->rx_tid[tid]++;
	} else {
		tid = 0;
		if (fc & WLAN_FC_TODS)
			sta->tx_tid[16]++;
		else
			sta->rx_tid[16]++;
	}
	if (tk) {
		if (os_memcmp(hdr->addr2, tdls->init->addr, ETH_ALEN) == 0)
			rsc = tdls->rsc_init[tid];
		else
			rsc = tdls->rsc_resp[tid];
	} else if (fc & WLAN_FC_TODS)
		rsc = sta->rsc_tods[tid];
	else
		rsc = sta->rsc_fromds[tid];


	if (tk == NULL && sta->pairwise_cipher == WPA_CIPHER_TKIP)
		tkip_get_pn(pn, data);
	else if (sta->pairwise_cipher == WPA_CIPHER_WEP40)
		goto skip_replay_det;
	else
		ccmp_get_pn(pn, data);
	if (os_memcmp(pn, rsc, 6) <= 0) {
		u16 seq_ctrl = le_to_host16(hdr->seq_ctrl);
		add_note(wt, MSG_INFO, "CCMP/TKIP replay detected: A1=" MACSTR
			 " A2=" MACSTR " A3=" MACSTR " seq=%u frag=%u",
			 MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
			 MAC2STR(hdr->addr3),
			 WLAN_GET_SEQ_SEQ(seq_ctrl),
			 WLAN_GET_SEQ_FRAG(seq_ctrl));
		wpa_hexdump(MSG_INFO, "RX PN", pn, 6);
		wpa_hexdump(MSG_INFO, "RSC", rsc, 6);
	}

skip_replay_det:
	if (tk)
		decrypted = ccmp_decrypt(tk, hdr, data, len, &dlen);
	else if (sta->pairwise_cipher == WPA_CIPHER_TKIP)
		decrypted = tkip_decrypt(sta->ptk.tk1, hdr, data, len, &dlen);
	else if (sta->pairwise_cipher == WPA_CIPHER_WEP40)
		decrypted = wep_decrypt(wt, hdr, data, len, &dlen);
	else if (sta->ptk_set)
		decrypted = ccmp_decrypt(sta->ptk.tk1, hdr, data, len, &dlen);
	else {
		decrypted = try_all_ptk(wt, sta->pairwise_cipher, hdr, data,
					len, &dlen);
		ptk_iter_done = 1;
	}
	if (!decrypted && !ptk_iter_done) {
		decrypted = try_all_ptk(wt, sta->pairwise_cipher, hdr, data,
					len, &dlen);
		if (decrypted) {
			add_note(wt, MSG_DEBUG, "Current PTK did not work, but found a match from all known PTKs");
		}
	}
	if (decrypted) {
		u16 fc = le_to_host16(hdr->frame_control);
		const u8 *peer_addr = NULL;
		if (!(fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)))
			peer_addr = hdr->addr1;
		os_memcpy(rsc, pn, 6);
		rx_data_process(wt, bss->bssid, sta->addr, dst, src, decrypted,
				dlen, 1, peer_addr);
		write_pcap_decrypted(wt, (const u8 *) hdr, 24 + (qos ? 2 : 0),
				     decrypted, dlen);
	} else if (!try_ptk_iter)
		add_note(wt, MSG_DEBUG, "Failed to decrypt frame");
	os_free(decrypted);
}


static void rx_data_bss(struct wlantest *wt, const struct ieee80211_hdr *hdr,
			const u8 *qos, const u8 *dst, const u8 *src,
			const u8 *data, size_t len)
{
	u16 fc = le_to_host16(hdr->frame_control);
	int prot = !!(fc & WLAN_FC_ISWEP);

	if (qos) {
		u8 ack = (qos[0] & 0x60) >> 5;
		wpa_printf(MSG_MSGDUMP, "BSS DATA: " MACSTR " -> " MACSTR
			   " len=%u%s tid=%u%s%s",
			   MAC2STR(src), MAC2STR(dst), (unsigned int) len,
			   prot ? " Prot" : "", qos[0] & 0x0f,
			   (qos[0] & 0x10) ? " EOSP" : "",
			   ack == 0 ? "" :
			   (ack == 1 ? " NoAck" :
			    (ack == 2 ? " NoExpAck" : " BA")));
	} else {
		wpa_printf(MSG_MSGDUMP, "BSS DATA: " MACSTR " -> " MACSTR
			   " len=%u%s",
			   MAC2STR(src), MAC2STR(dst), (unsigned int) len,
			   prot ? " Prot" : "");
	}

	if (prot)
		rx_data_bss_prot(wt, hdr, qos, dst, src, data, len);
	else {
		const u8 *bssid, *sta_addr, *peer_addr;
		struct wlantest_bss *bss;

		if (fc & WLAN_FC_TODS) {
			bssid = hdr->addr1;
			sta_addr = hdr->addr2;
			peer_addr = NULL;
		} else if (fc & WLAN_FC_FROMDS) {
			bssid = hdr->addr2;
			sta_addr = hdr->addr1;
			peer_addr = NULL;
		} else {
			bssid = hdr->addr3;
			sta_addr = hdr->addr2;
			peer_addr = hdr->addr1;
		}

		bss = bss_get(wt, bssid);
		if (bss) {
			struct wlantest_sta *sta = sta_get(bss, sta_addr);

			if (sta) {
				if (qos) {
					int tid = qos[0] & 0x0f;
					if (fc & WLAN_FC_TODS)
						sta->tx_tid[tid]++;
					else
						sta->rx_tid[tid]++;
				} else {
					if (fc & WLAN_FC_TODS)
						sta->tx_tid[16]++;
					else
						sta->rx_tid[16]++;
				}
			}
		}

		rx_data_process(wt, bssid, sta_addr, dst, src, data, len, 0,
				peer_addr);
	}
}


static struct wlantest_tdls * get_tdls(struct wlantest *wt, const u8 *bssid,
				       const u8 *sta1_addr,
				       const u8 *sta2_addr)
{
	struct wlantest_bss *bss;
	struct wlantest_sta *sta1, *sta2;
	struct wlantest_tdls *tdls, *found = NULL;

	bss = bss_find(wt, bssid);
	if (bss == NULL)
		return NULL;
	sta1 = sta_find(bss, sta1_addr);
	if (sta1 == NULL)
		return NULL;
	sta2 = sta_find(bss, sta2_addr);
	if (sta2 == NULL)
		return NULL;

	dl_list_for_each(tdls, &bss->tdls, struct wlantest_tdls, list) {
		if ((tdls->init == sta1 && tdls->resp == sta2) ||
		    (tdls->init == sta2 && tdls->resp == sta1)) {
			found = tdls;
			if (tdls->link_up)
				break;
		}
	}

	return found;
}


static void add_direct_link(struct wlantest *wt, const u8 *bssid,
			    const u8 *sta1_addr, const u8 *sta2_addr)
{
	struct wlantest_tdls *tdls;

	tdls = get_tdls(wt, bssid, sta1_addr, sta2_addr);
	if (tdls == NULL)
		return;

	if (tdls->link_up)
		tdls->counters[WLANTEST_TDLS_COUNTER_VALID_DIRECT_LINK]++;
	else
		tdls->counters[WLANTEST_TDLS_COUNTER_INVALID_DIRECT_LINK]++;
}


static void add_ap_path(struct wlantest *wt, const u8 *bssid,
			const u8 *sta1_addr, const u8 *sta2_addr)
{
	struct wlantest_tdls *tdls;

	tdls = get_tdls(wt, bssid, sta1_addr, sta2_addr);
	if (tdls == NULL)
		return;

	if (tdls->link_up)
		tdls->counters[WLANTEST_TDLS_COUNTER_INVALID_AP_PATH]++;
	else
		tdls->counters[WLANTEST_TDLS_COUNTER_VALID_AP_PATH]++;
}


void rx_data(struct wlantest *wt, const u8 *data, size_t len)
{
	const struct ieee80211_hdr *hdr;
	u16 fc, stype;
	size_t hdrlen;
	const u8 *qos = NULL;

	if (len < 24)
		return;

	hdr = (const struct ieee80211_hdr *) data;
	fc = le_to_host16(hdr->frame_control);
	stype = WLAN_FC_GET_STYPE(fc);
	hdrlen = 24;
	if ((fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) ==
	    (WLAN_FC_TODS | WLAN_FC_FROMDS))
		hdrlen += ETH_ALEN;
	if (stype & 0x08) {
		qos = data + hdrlen;
		hdrlen += 2;
	}
	if (len < hdrlen)
		return;
	wt->rx_data++;

	switch (fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) {
	case 0:
		wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s IBSS DA=" MACSTR " SA="
			   MACSTR " BSSID=" MACSTR,
			   data_stype(WLAN_FC_GET_STYPE(fc)),
			   fc & WLAN_FC_PWRMGT ? " PwrMgt" : "",
			   fc & WLAN_FC_ISWEP ? " Prot" : "",
			   MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
			   MAC2STR(hdr->addr3));
		add_direct_link(wt, hdr->addr3, hdr->addr1, hdr->addr2);
		rx_data_bss(wt, hdr, qos, hdr->addr1, hdr->addr2,
			    data + hdrlen, len - hdrlen);
		break;
	case WLAN_FC_FROMDS:
		wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s FromDS DA=" MACSTR
			   " BSSID=" MACSTR " SA=" MACSTR,
			   data_stype(WLAN_FC_GET_STYPE(fc)),
			   fc & WLAN_FC_PWRMGT ? " PwrMgt" : "",
			   fc & WLAN_FC_ISWEP ? " Prot" : "",
			   MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
			   MAC2STR(hdr->addr3));
		add_ap_path(wt, hdr->addr2, hdr->addr1, hdr->addr3);
		rx_data_bss(wt, hdr, qos, hdr->addr1, hdr->addr3,
			    data + hdrlen, len - hdrlen);
		break;
	case WLAN_FC_TODS:
		wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s ToDS BSSID=" MACSTR
			   " SA=" MACSTR " DA=" MACSTR,
			   data_stype(WLAN_FC_GET_STYPE(fc)),
			   fc & WLAN_FC_PWRMGT ? " PwrMgt" : "",
			   fc & WLAN_FC_ISWEP ? " Prot" : "",
			   MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
			   MAC2STR(hdr->addr3));
		add_ap_path(wt, hdr->addr1, hdr->addr3, hdr->addr2);
		rx_data_bss(wt, hdr, qos, hdr->addr3, hdr->addr2,
			    data + hdrlen, len - hdrlen);
		break;
	case WLAN_FC_TODS | WLAN_FC_FROMDS:
		wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s WDS RA=" MACSTR " TA="
			   MACSTR " DA=" MACSTR " SA=" MACSTR,
			   data_stype(WLAN_FC_GET_STYPE(fc)),
			   fc & WLAN_FC_PWRMGT ? " PwrMgt" : "",
			   fc & WLAN_FC_ISWEP ? " Prot" : "",
			   MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
			   MAC2STR(hdr->addr3),
			   MAC2STR((const u8 *) (hdr + 1)));
		break;
	}
}