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wlantest: Add counters for AP deauth/disassoc while asleep/awake
[thirdparty/hostap.git] / wlantest / rx_data.c
CommitLineData
2d73f0a8
JM		 1/*
2 * Received Data frame processing
3 * Copyright (c) 2010, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15#include "utils/includes.h"
ee3b84be 16#include <linux/if_ether.h>
2d73f0a8
JM		 17
18#include "utils/common.h"
a9dd29d3 19#include "common/defs.h"
2d73f0a8
JM		 20#include "common/ieee802_11_defs.h"
21#include "wlantest.h"
22
23
24static const char * data_stype(u16 stype)
25{
26 switch (stype) {
27 case WLAN_FC_STYPE_DATA:
28 return "DATA";
29 case WLAN_FC_STYPE_DATA_CFACK:
30 return "DATA-CFACK";
31 case WLAN_FC_STYPE_DATA_CFPOLL:
32 return "DATA-CFPOLL";
33 case WLAN_FC_STYPE_DATA_CFACKPOLL:
34 return "DATA-CFACKPOLL";
35 case WLAN_FC_STYPE_NULLFUNC:
36 return "NULLFUNC";
37 case WLAN_FC_STYPE_CFACK:
38 return "CFACK";
39 case WLAN_FC_STYPE_CFPOLL:
40 return "CFPOLL";
41 case WLAN_FC_STYPE_CFACKPOLL:
42 return "CFACKPOLL";
43 case WLAN_FC_STYPE_QOS_DATA:
44 return "QOSDATA";
45 case WLAN_FC_STYPE_QOS_DATA_CFACK:
46 return "QOSDATA-CFACK";
47 case WLAN_FC_STYPE_QOS_DATA_CFPOLL:
48 return "QOSDATA-CFPOLL";
49 case WLAN_FC_STYPE_QOS_DATA_CFACKPOLL:
50 return "QOSDATA-CFACKPOLL";
51 case WLAN_FC_STYPE_QOS_NULL:
52 return "QOS-NULL";
53 case WLAN_FC_STYPE_QOS_CFPOLL:
54 return "QOS-CFPOLL";
55 case WLAN_FC_STYPE_QOS_CFACKPOLL:
56 return "QOS-CFACKPOLL";
57 }
58 return "??";
59}
60
61
ee3b84be
JM		 62static void rx_data_eth(struct wlantest *wt, const u8 *bssid,
63 const u8 *sta_addr, const u8 *dst, const u8 *src,
32234bba
JM		 64 u16 ethertype, const u8 *data, size_t len, int prot)
65{
ee3b84be
JM		 66 switch (ethertype) {
67 case ETH_P_PAE:
32234bba 68 rx_data_eapol(wt, dst, src, data, len, prot);
ee3b84be
JM		 69 break;
70 case ETH_P_IP:
71 rx_data_ip(wt, bssid, sta_addr, dst, src, data, len);
72 break;
b39f5834
JM		 73 case 0x890d:
74 rx_data_80211_encap(wt, bssid, sta_addr, dst, src, data, len);
75 break;
ee3b84be 76 }
32234bba
JM		 77}
78
79
ee3b84be
JM		 80static void rx_data_process(struct wlantest *wt, const u8 *bssid,
81 const u8 *sta_addr,
82 const u8 *dst, const u8 *src,
32234bba
JM		 83 const u8 *data, size_t len, int prot)
84{
4bc82fc7
JM		 85 if (len == 0)
86 return;
87
32234bba 88 if (len >= 8 && os_memcmp(data, "\xaa\xaa\x03\x00\x00\x00", 6) == 0) {
ee3b84be
JM		 89 rx_data_eth(wt, bssid, sta_addr, dst, src,
90 WPA_GET_BE16(data + 6), data + 8, len - 8, prot);
32234bba
JM		 91 return;
92 }
93
4bc82fc7 94 wpa_hexdump(MSG_DEBUG, "Unrecognized LLC", data, len > 8 ? 8 : len);
32234bba
JM		 95}
96
97
d318c534
JM		 98static void rx_data_bss_prot_group(struct wlantest *wt,
99 const struct ieee80211_hdr *hdr,
100 const u8 *qos, const u8 *dst, const u8 *src,
101 const u8 *data, size_t len)
102{
103 struct wlantest_bss *bss;
104 int keyid;
07d0a5be
JM		 105 u8 *decrypted;
106 size_t dlen;
2edd5c23 107 u8 pn[6];
d318c534
JM		 108
109 bss = bss_get(wt, hdr->addr2);
110 if (bss == NULL)
111 return;
112 if (len < 4) {
113 wpa_printf(MSG_INFO, "Too short group addressed data frame");
114 return;
115 }
116
20062114
JM		 117 if (bss->group_cipher & (WPA_CIPHER_TKIP | WPA_CIPHER_CCMP) &&
118 !(data[3] & 0x20)) {
119 wpa_printf(MSG_INFO, "Expected TKIP/CCMP frame from "
120 MACSTR " did not have ExtIV bit set to 1",
121 MAC2STR(bss->bssid));
122 return;
123 }
124
16b8b6ea
JM		 125 if (bss->group_cipher == WPA_CIPHER_TKIP) {
126 if (data[3] & 0x1f) {
127 wpa_printf(MSG_INFO, "TKIP frame from " MACSTR " used "
128 "non-zero reserved bit",
129 MAC2STR(bss->bssid));
130 }
131 if (data[1] != ((data[0] | 0x20) & 0x7f)) {
132 wpa_printf(MSG_INFO, "TKIP frame from " MACSTR " used "
133 "incorrect WEPSeed[1] (was 0x%x, expected "
134 "0x%x)",
135 MAC2STR(bss->bssid), data[1],
136 (data[0] | 0x20) & 0x7f);
137 }
138 } else if (bss->group_cipher == WPA_CIPHER_CCMP) {
139 if (data[2] != 0 || (data[3] & 0x1f) != 0) {
140 wpa_printf(MSG_INFO, "CCMP frame from " MACSTR " used "
141 "non-zero reserved bit",
142 MAC2STR(bss->bssid));
143 }
144 }
145
d318c534
JM		 146 keyid = data[3] >> 6;
147 if (bss->gtk_len[keyid] == 0) {
148 wpa_printf(MSG_MSGDUMP, "No GTK known to decrypt the frame "
149 "(A2=" MACSTR " KeyID=%d)",
150 MAC2STR(hdr->addr2), keyid);
151 return;
152 }
153
4dac8453
JM		 154 if (bss->group_cipher == WPA_CIPHER_TKIP)
155 tkip_get_pn(pn, data);
156 else
157 ccmp_get_pn(pn, data);
2edd5c23 158 if (os_memcmp(pn, bss->rsc[keyid], 6) <= 0) {
01b397dd
JM		 159 u16 seq_ctrl = le_to_host16(hdr->seq_ctrl);
160 wpa_printf(MSG_INFO, "CCMP/TKIP replay detected: A1=" MACSTR
161 " A2=" MACSTR " A3=" MACSTR " seq=%u frag=%u",
162 MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
163 MAC2STR(hdr->addr3),
164 WLAN_GET_SEQ_SEQ(seq_ctrl),
165 WLAN_GET_SEQ_FRAG(seq_ctrl));
2edd5c23
JM		 166 wpa_hexdump(MSG_INFO, "RX PN", pn, 6);
167 wpa_hexdump(MSG_INFO, "RSC", bss->rsc[keyid], 6);
168 }
169
2924b0eb
JM		 170 if (bss->group_cipher == WPA_CIPHER_TKIP)
171 decrypted = tkip_decrypt(bss->gtk[keyid], hdr, data, len,
172 &dlen);
173 else
174 decrypted = ccmp_decrypt(bss->gtk[keyid], hdr, data, len,
175 &dlen);
2edd5c23 176 if (decrypted) {
ee3b84be
JM		 177 rx_data_process(wt, bss->bssid, NULL, dst, src, decrypted,
178 dlen, 1);
2edd5c23 179 os_memcpy(bss->rsc[keyid], pn, 6);
64f45d07
JM		 180 write_pcap_decrypted(wt, (const u8 *) hdr, 24 + (qos ? 2 : 0),
181 decrypted, dlen);
2edd5c23 182 }
07d0a5be 183 os_free(decrypted);
d318c534
JM		 184}
185
186
32234bba
JM		 187static void rx_data_bss_prot(struct wlantest *wt,
188 const struct ieee80211_hdr *hdr, const u8 *qos,
189 const u8 *dst, const u8 *src, const u8 *data,
190 size_t len)
191{
d318c534 192 struct wlantest_bss *bss;
b39f5834 193 struct wlantest_sta *sta, *sta2;
d318c534
JM		 194 int keyid;
195 u16 fc = le_to_host16(hdr->frame_control);
196 u8 *decrypted;
197 size_t dlen;
2edd5c23
JM		 198 int tid;
199 u8 pn[6], *rsc;
b39f5834
JM		 200 struct wlantest_tdls *tdls = NULL;
201 const u8 *tk = NULL;
d318c534
JM		 202
203 if (hdr->addr1[0] & 0x01) {
204 rx_data_bss_prot_group(wt, hdr, qos, dst, src, data, len);
205 return;
206 }
207
208 if (fc & WLAN_FC_TODS) {
209 bss = bss_get(wt, hdr->addr1);
210 if (bss == NULL)
211 return;
212 sta = sta_get(bss, hdr->addr2);
b39f5834 213 } else if (fc & WLAN_FC_FROMDS) {
d318c534
JM		 214 bss = bss_get(wt, hdr->addr2);
215 if (bss == NULL)
216 return;
217 sta = sta_get(bss, hdr->addr1);
b39f5834
JM		 218 } else {
219 bss = bss_get(wt, hdr->addr3);
220 if (bss == NULL)
221 return;
222 sta = sta_find(bss, hdr->addr2);
223 sta2 = sta_find(bss, hdr->addr1);
224 if (sta == NULL || sta2 == NULL)
225 return;
226 dl_list_for_each(tdls, &bss->tdls, struct wlantest_tdls, list)
227 {
228 if ((tdls->init == sta && tdls->resp == sta2) ||
229 (tdls->init == sta2 && tdls->resp == sta)) {
230 if (!tdls->link_up)
231 wpa_printf(MSG_DEBUG, "TDLS: Link not "
232 "up, but Data frame seen");
233 tk = tdls->tpk.tk;
234 break;
235 }
236 }
d318c534 237 }
b39f5834 238 if ((sta == NULL || !sta->ptk_set) && tk == NULL) {
d318c534
JM		 239 wpa_printf(MSG_MSGDUMP, "No PTK known to decrypt the frame");
240 return;
241 }
242
243 if (len < 4) {
244 wpa_printf(MSG_INFO, "Too short encrypted data frame");
245 return;
246 }
247
20062114
JM		 248 if (sta->pairwise_cipher & (WPA_CIPHER_TKIP | WPA_CIPHER_CCMP) &&
249 !(data[3] & 0x20)) {
250 wpa_printf(MSG_INFO, "Expected TKIP/CCMP frame from "
251 MACSTR " did not have ExtIV bit set to 1",
252 MAC2STR(src));
253 return;
254 }
255
b39f5834 256 if (tk == NULL && sta->pairwise_cipher == WPA_CIPHER_TKIP) {
16b8b6ea
JM		 257 if (data[3] & 0x1f) {
258 wpa_printf(MSG_INFO, "TKIP frame from " MACSTR " used "
259 "non-zero reserved bit",
260 MAC2STR(hdr->addr2));
261 }
262 if (data[1] != ((data[0] | 0x20) & 0x7f)) {
263 wpa_printf(MSG_INFO, "TKIP frame from " MACSTR " used "
264 "incorrect WEPSeed[1] (was 0x%x, expected "
265 "0x%x)",
266 MAC2STR(hdr->addr2), data[1],
267 (data[0] | 0x20) & 0x7f);
268 }
b39f5834 269 } else if (tk || sta->pairwise_cipher == WPA_CIPHER_CCMP) {
16b8b6ea
JM		 270 if (data[2] != 0 || (data[3] & 0x1f) != 0) {
271 wpa_printf(MSG_INFO, "CCMP frame from " MACSTR " used "
272 "non-zero reserved bit",
273 MAC2STR(hdr->addr2));
274 }
275 }
276
d318c534
JM		 277 keyid = data[3] >> 6;
278 if (keyid != 0) {
279 wpa_printf(MSG_INFO, "Unexpected non-zero KeyID %d in "
280 "individually addressed Data frame from " MACSTR,
281 keyid, MAC2STR(hdr->addr2));
282 }
283
2edd5c23
JM		 284 if (qos)
285 tid = qos[0] & 0x0f;
286 else
287 tid = 0;
b39f5834
JM		 288 if (tk) {
289 if (os_memcmp(hdr->addr2, tdls->init->addr, ETH_ALEN) == 0)
290 rsc = tdls->rsc_init[tid];
291 else
292 rsc = tdls->rsc_resp[tid];
293 } else if (fc & WLAN_FC_TODS)
2edd5c23
JM		 294 rsc = sta->rsc_tods[tid];
295 else
296 rsc = sta->rsc_fromds[tid];
297
298
b39f5834 299 if (tk == NULL && sta->pairwise_cipher == WPA_CIPHER_TKIP)
4dac8453
JM		 300 tkip_get_pn(pn, data);
301 else
302 ccmp_get_pn(pn, data);
2edd5c23 303 if (os_memcmp(pn, rsc, 6) <= 0) {
01b397dd
JM		 304 u16 seq_ctrl = le_to_host16(hdr->seq_ctrl);
305 wpa_printf(MSG_INFO, "CCMP/TKIP replay detected: A1=" MACSTR
306 " A2=" MACSTR " A3=" MACSTR " seq=%u frag=%u",
307 MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
308 MAC2STR(hdr->addr3),
309 WLAN_GET_SEQ_SEQ(seq_ctrl),
310 WLAN_GET_SEQ_FRAG(seq_ctrl));
2edd5c23
JM		 311 wpa_hexdump(MSG_INFO, "RX PN", pn, 6);
312 wpa_hexdump(MSG_INFO, "RSC", rsc, 6);
313 }
314
b39f5834
JM		 315 if (tk)
316 decrypted = ccmp_decrypt(tk, hdr, data, len, &dlen);
317 else if (sta->pairwise_cipher == WPA_CIPHER_TKIP)
2924b0eb
JM		 318 decrypted = tkip_decrypt(sta->ptk.tk1, hdr, data, len, &dlen);
319 else
320 decrypted = ccmp_decrypt(sta->ptk.tk1, hdr, data, len, &dlen);
2edd5c23 321 if (decrypted) {
ee3b84be
JM		 322 rx_data_process(wt, bss->bssid, sta->addr, dst, src, decrypted,
323 dlen, 1);
2edd5c23 324 os_memcpy(rsc, pn, 6);
64f45d07
JM		 325 write_pcap_decrypted(wt, (const u8 *) hdr, 24 + (qos ? 2 : 0),
326 decrypted, dlen);
2edd5c23 327 }
d318c534 328 os_free(decrypted);
32234bba
JM		 329}
330
331
332static void rx_data_bss(struct wlantest *wt, const struct ieee80211_hdr *hdr,
333 const u8 *qos, const u8 *dst, const u8 *src,
334 const u8 *data, size_t len)
335{
336 u16 fc = le_to_host16(hdr->frame_control);
337 int prot = !!(fc & WLAN_FC_ISWEP);
338
339 if (qos) {
340 u8 ack = (qos[0] & 0x60) >> 5;
341 wpa_printf(MSG_MSGDUMP, "BSS DATA: " MACSTR " -> " MACSTR
342 " len=%u%s tid=%u%s%s",
343 MAC2STR(src), MAC2STR(dst), (unsigned int) len,
344 prot ? " Prot" : "", qos[0] & 0x0f,
345 (qos[0] & 0x10) ? " EOSP" : "",
346 ack == 0 ? "" :
347 (ack == 1 ? " NoAck" :
348 (ack == 2 ? " NoExpAck" : " BA")));
349 } else {
350 wpa_printf(MSG_MSGDUMP, "BSS DATA: " MACSTR " -> " MACSTR
351 " len=%u%s",
352 MAC2STR(src), MAC2STR(dst), (unsigned int) len,
353 prot ? " Prot" : "");
354 }
355
356 if (prot)
357 rx_data_bss_prot(wt, hdr, qos, dst, src, data, len);
ee3b84be
JM		 358 else {
359 const u8 *bssid, *sta_addr;
360 if (fc & WLAN_FC_TODS) {
361 bssid = hdr->addr1;
362 sta_addr = hdr->addr2;
363 } else {
364 bssid = hdr->addr2;
365 sta_addr = hdr->addr1;
366 }
367 rx_data_process(wt, bssid, sta_addr, dst, src, data, len, 0);
368 }
32234bba
JM		 369}
370
371
0e42fff3
JM		 372static struct wlantest_tdls * get_tdls(struct wlantest *wt, const u8 *bssid,
373 const u8 *sta1_addr,
374 const u8 *sta2_addr)
375{
376 struct wlantest_bss *bss;
377 struct wlantest_sta *sta1, *sta2;
378 struct wlantest_tdls *tdls;
379
380 bss = bss_find(wt, bssid);
381 if (bss == NULL)
382 return NULL;
383 sta1 = sta_find(bss, sta1_addr);
384 if (sta1 == NULL)
385 return NULL;
386 sta2 = sta_find(bss, sta2_addr);
387 if (sta2 == NULL)
388 return NULL;
389
390 dl_list_for_each(tdls, &bss->tdls, struct wlantest_tdls, list) {
391 if ((tdls->init == sta1 && tdls->resp == sta2) ||
392 (tdls->init == sta2 && tdls->resp == sta1))
393 return tdls;
394 }
395
396 return NULL;
397}
398
399
400static void add_direct_link(struct wlantest *wt, const u8 *bssid,
401 const u8 *sta1_addr, const u8 *sta2_addr)
402{
403 struct wlantest_tdls *tdls;
404
405 tdls = get_tdls(wt, bssid, sta1_addr, sta2_addr);
406 if (tdls == NULL)
407 return;
408
409 if (tdls->link_up)
410 tdls->counters[WLANTEST_TDLS_COUNTER_VALID_DIRECT_LINK]++;
411 else
412 tdls->counters[WLANTEST_TDLS_COUNTER_INVALID_DIRECT_LINK]++;
413}
414
415
416static void add_ap_path(struct wlantest *wt, const u8 *bssid,
417 const u8 *sta1_addr, const u8 *sta2_addr)
418{
419 struct wlantest_tdls *tdls;
420
421 tdls = get_tdls(wt, bssid, sta1_addr, sta2_addr);
422 if (tdls == NULL)
423 return;
424
425 if (tdls->link_up)
426 tdls->counters[WLANTEST_TDLS_COUNTER_INVALID_AP_PATH]++;
427 else
428 tdls->counters[WLANTEST_TDLS_COUNTER_VALID_AP_PATH]++;
429}
430
431
2d73f0a8
JM		 432void rx_data(struct wlantest *wt, const u8 *data, size_t len)
433{
434 const struct ieee80211_hdr *hdr;
32234bba
JM		 435 u16 fc, stype;
436 size_t hdrlen;
437 const u8 *qos = NULL;
2d73f0a8
JM		 438
439 if (len < 24)
440 return;
441
442 hdr = (const struct ieee80211_hdr *) data;
443 fc = le_to_host16(hdr->frame_control);
32234bba
JM		 444 stype = WLAN_FC_GET_STYPE(fc);
445 hdrlen = 24;
446 if ((fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) ==
447 (WLAN_FC_TODS | WLAN_FC_FROMDS))
448 hdrlen += ETH_ALEN;
449 if (stype & 0x08) {
450 qos = data + hdrlen;
451 hdrlen += 2;
452 }
453 if (len < hdrlen)
454 return;
2d73f0a8
JM		 455 wt->rx_data++;
456
457 switch (fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) {
458 case 0:
459 wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s IBSS DA=" MACSTR " SA="
460 MACSTR " BSSID=" MACSTR,
461 data_stype(WLAN_FC_GET_STYPE(fc)),
462 fc & WLAN_FC_PWRMGT ? " PwrMgt" : "",
463 fc & WLAN_FC_ISWEP ? " Prot" : "",
464 MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
465 MAC2STR(hdr->addr3));
0e42fff3 466 add_direct_link(wt, hdr->addr3, hdr->addr1, hdr->addr2);
b39f5834
JM		 467 rx_data_bss(wt, hdr, qos, hdr->addr1, hdr->addr2,
468 data + hdrlen, len - hdrlen);
2d73f0a8
JM		 469 break;
470 case WLAN_FC_FROMDS:
471 wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s FromDS DA=" MACSTR
472 " BSSID=" MACSTR " SA=" MACSTR,
473 data_stype(WLAN_FC_GET_STYPE(fc)),
474 fc & WLAN_FC_PWRMGT ? " PwrMgt" : "",
475 fc & WLAN_FC_ISWEP ? " Prot" : "",
476 MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
477 MAC2STR(hdr->addr3));
0e42fff3 478 add_ap_path(wt, hdr->addr2, hdr->addr1, hdr->addr3);
32234bba
JM		 479 rx_data_bss(wt, hdr, qos, hdr->addr1, hdr->addr2,
480 data + hdrlen, len - hdrlen);
2d73f0a8
JM		 481 break;
482 case WLAN_FC_TODS:
483 wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s ToDS BSSID=" MACSTR
484 " SA=" MACSTR " DA=" MACSTR,
485 data_stype(WLAN_FC_GET_STYPE(fc)),
486 fc & WLAN_FC_PWRMGT ? " PwrMgt" : "",
487 fc & WLAN_FC_ISWEP ? " Prot" : "",
488 MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
489 MAC2STR(hdr->addr3));
0e42fff3 490 add_ap_path(wt, hdr->addr1, hdr->addr3, hdr->addr2);
32234bba
JM		 491 rx_data_bss(wt, hdr, qos, hdr->addr3, hdr->addr2,
492 data + hdrlen, len - hdrlen);
2d73f0a8
JM		 493 break;
494 case WLAN_FC_TODS | WLAN_FC_FROMDS:
495 wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s WDS RA=" MACSTR " TA="
496 MACSTR " DA=" MACSTR " SA=" MACSTR,
497 data_stype(WLAN_FC_GET_STYPE(fc)),
498 fc & WLAN_FC_PWRMGT ? " PwrMgt" : "",
499 fc & WLAN_FC_ISWEP ? " Prot" : "",
500 MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
501 MAC2STR(hdr->addr3),
502 MAC2STR((const u8 *) (hdr + 1)));
503 break;
504 }
505}
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