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Commit | Line | Data |
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2d73f0a8 JM |
1 | /* |
2 | * Received Data frame processing | |
3 | * Copyright (c) 2010, Jouni Malinen <j@w1.fi> | |
4 | * | |
0f3d578e JM |
5 | * This software may be distributed under the terms of the BSD license. |
6 | * See README for more details. | |
2d73f0a8 JM |
7 | */ |
8 | ||
9 | #include "utils/includes.h" | |
ee3b84be | 10 | #include <linux/if_ether.h> |
2d73f0a8 JM |
11 | |
12 | #include "utils/common.h" | |
a9dd29d3 | 13 | #include "common/defs.h" |
2d73f0a8 JM |
14 | #include "common/ieee802_11_defs.h" |
15 | #include "wlantest.h" | |
16 | ||
17 | ||
18 | static const char * data_stype(u16 stype) | |
19 | { | |
20 | switch (stype) { | |
21 | case WLAN_FC_STYPE_DATA: | |
22 | return "DATA"; | |
23 | case WLAN_FC_STYPE_DATA_CFACK: | |
24 | return "DATA-CFACK"; | |
25 | case WLAN_FC_STYPE_DATA_CFPOLL: | |
26 | return "DATA-CFPOLL"; | |
27 | case WLAN_FC_STYPE_DATA_CFACKPOLL: | |
28 | return "DATA-CFACKPOLL"; | |
29 | case WLAN_FC_STYPE_NULLFUNC: | |
30 | return "NULLFUNC"; | |
31 | case WLAN_FC_STYPE_CFACK: | |
32 | return "CFACK"; | |
33 | case WLAN_FC_STYPE_CFPOLL: | |
34 | return "CFPOLL"; | |
35 | case WLAN_FC_STYPE_CFACKPOLL: | |
36 | return "CFACKPOLL"; | |
37 | case WLAN_FC_STYPE_QOS_DATA: | |
38 | return "QOSDATA"; | |
39 | case WLAN_FC_STYPE_QOS_DATA_CFACK: | |
40 | return "QOSDATA-CFACK"; | |
41 | case WLAN_FC_STYPE_QOS_DATA_CFPOLL: | |
42 | return "QOSDATA-CFPOLL"; | |
43 | case WLAN_FC_STYPE_QOS_DATA_CFACKPOLL: | |
44 | return "QOSDATA-CFACKPOLL"; | |
45 | case WLAN_FC_STYPE_QOS_NULL: | |
46 | return "QOS-NULL"; | |
47 | case WLAN_FC_STYPE_QOS_CFPOLL: | |
48 | return "QOS-CFPOLL"; | |
49 | case WLAN_FC_STYPE_QOS_CFACKPOLL: | |
50 | return "QOS-CFACKPOLL"; | |
51 | } | |
52 | return "??"; | |
53 | } | |
54 | ||
55 | ||
ee3b84be JM |
56 | static void rx_data_eth(struct wlantest *wt, const u8 *bssid, |
57 | const u8 *sta_addr, const u8 *dst, const u8 *src, | |
244c9303 JM |
58 | u16 ethertype, const u8 *data, size_t len, int prot, |
59 | const u8 *peer_addr) | |
32234bba | 60 | { |
ee3b84be JM |
61 | switch (ethertype) { |
62 | case ETH_P_PAE: | |
32234bba | 63 | rx_data_eapol(wt, dst, src, data, len, prot); |
ee3b84be JM |
64 | break; |
65 | case ETH_P_IP: | |
244c9303 JM |
66 | rx_data_ip(wt, bssid, sta_addr, dst, src, data, len, |
67 | peer_addr); | |
ee3b84be | 68 | break; |
b39f5834 JM |
69 | case 0x890d: |
70 | rx_data_80211_encap(wt, bssid, sta_addr, dst, src, data, len); | |
71 | break; | |
ee3b84be | 72 | } |
32234bba JM |
73 | } |
74 | ||
75 | ||
ee3b84be JM |
76 | static void rx_data_process(struct wlantest *wt, const u8 *bssid, |
77 | const u8 *sta_addr, | |
78 | const u8 *dst, const u8 *src, | |
244c9303 JM |
79 | const u8 *data, size_t len, int prot, |
80 | const u8 *peer_addr) | |
32234bba | 81 | { |
4bc82fc7 JM |
82 | if (len == 0) |
83 | return; | |
84 | ||
32234bba | 85 | if (len >= 8 && os_memcmp(data, "\xaa\xaa\x03\x00\x00\x00", 6) == 0) { |
ee3b84be | 86 | rx_data_eth(wt, bssid, sta_addr, dst, src, |
244c9303 JM |
87 | WPA_GET_BE16(data + 6), data + 8, len - 8, prot, |
88 | peer_addr); | |
32234bba JM |
89 | return; |
90 | } | |
91 | ||
4bc82fc7 | 92 | wpa_hexdump(MSG_DEBUG, "Unrecognized LLC", data, len > 8 ? 8 : len); |
32234bba JM |
93 | } |
94 | ||
95 | ||
d318c534 JM |
96 | static void rx_data_bss_prot_group(struct wlantest *wt, |
97 | const struct ieee80211_hdr *hdr, | |
98 | const u8 *qos, const u8 *dst, const u8 *src, | |
99 | const u8 *data, size_t len) | |
100 | { | |
101 | struct wlantest_bss *bss; | |
102 | int keyid; | |
07d0a5be JM |
103 | u8 *decrypted; |
104 | size_t dlen; | |
2edd5c23 | 105 | u8 pn[6]; |
d318c534 JM |
106 | |
107 | bss = bss_get(wt, hdr->addr2); | |
108 | if (bss == NULL) | |
109 | return; | |
110 | if (len < 4) { | |
111 | wpa_printf(MSG_INFO, "Too short group addressed data frame"); | |
112 | return; | |
113 | } | |
114 | ||
20062114 JM |
115 | if (bss->group_cipher & (WPA_CIPHER_TKIP | WPA_CIPHER_CCMP) && |
116 | !(data[3] & 0x20)) { | |
117 | wpa_printf(MSG_INFO, "Expected TKIP/CCMP frame from " | |
118 | MACSTR " did not have ExtIV bit set to 1", | |
119 | MAC2STR(bss->bssid)); | |
120 | return; | |
121 | } | |
122 | ||
16b8b6ea JM |
123 | if (bss->group_cipher == WPA_CIPHER_TKIP) { |
124 | if (data[3] & 0x1f) { | |
125 | wpa_printf(MSG_INFO, "TKIP frame from " MACSTR " used " | |
126 | "non-zero reserved bit", | |
127 | MAC2STR(bss->bssid)); | |
128 | } | |
129 | if (data[1] != ((data[0] | 0x20) & 0x7f)) { | |
130 | wpa_printf(MSG_INFO, "TKIP frame from " MACSTR " used " | |
131 | "incorrect WEPSeed[1] (was 0x%x, expected " | |
132 | "0x%x)", | |
133 | MAC2STR(bss->bssid), data[1], | |
134 | (data[0] | 0x20) & 0x7f); | |
135 | } | |
136 | } else if (bss->group_cipher == WPA_CIPHER_CCMP) { | |
137 | if (data[2] != 0 || (data[3] & 0x1f) != 0) { | |
138 | wpa_printf(MSG_INFO, "CCMP frame from " MACSTR " used " | |
139 | "non-zero reserved bit", | |
140 | MAC2STR(bss->bssid)); | |
141 | } | |
142 | } | |
143 | ||
d318c534 | 144 | keyid = data[3] >> 6; |
2e479416 JM |
145 | if (bss->gtk_len[keyid] == 0 && bss->group_cipher != WPA_CIPHER_WEP40) |
146 | { | |
d318c534 JM |
147 | wpa_printf(MSG_MSGDUMP, "No GTK known to decrypt the frame " |
148 | "(A2=" MACSTR " KeyID=%d)", | |
149 | MAC2STR(hdr->addr2), keyid); | |
150 | return; | |
151 | } | |
152 | ||
4dac8453 JM |
153 | if (bss->group_cipher == WPA_CIPHER_TKIP) |
154 | tkip_get_pn(pn, data); | |
2e479416 JM |
155 | else if (bss->group_cipher == WPA_CIPHER_WEP40) |
156 | goto skip_replay_det; | |
4dac8453 JM |
157 | else |
158 | ccmp_get_pn(pn, data); | |
2edd5c23 | 159 | if (os_memcmp(pn, bss->rsc[keyid], 6) <= 0) { |
01b397dd JM |
160 | u16 seq_ctrl = le_to_host16(hdr->seq_ctrl); |
161 | wpa_printf(MSG_INFO, "CCMP/TKIP replay detected: A1=" MACSTR | |
162 | " A2=" MACSTR " A3=" MACSTR " seq=%u frag=%u", | |
163 | MAC2STR(hdr->addr1), MAC2STR(hdr->addr2), | |
164 | MAC2STR(hdr->addr3), | |
165 | WLAN_GET_SEQ_SEQ(seq_ctrl), | |
166 | WLAN_GET_SEQ_FRAG(seq_ctrl)); | |
2edd5c23 JM |
167 | wpa_hexdump(MSG_INFO, "RX PN", pn, 6); |
168 | wpa_hexdump(MSG_INFO, "RSC", bss->rsc[keyid], 6); | |
169 | } | |
170 | ||
2e479416 | 171 | skip_replay_det: |
2924b0eb JM |
172 | if (bss->group_cipher == WPA_CIPHER_TKIP) |
173 | decrypted = tkip_decrypt(bss->gtk[keyid], hdr, data, len, | |
174 | &dlen); | |
2e479416 JM |
175 | else if (bss->group_cipher == WPA_CIPHER_WEP40) |
176 | decrypted = wep_decrypt(wt, hdr, data, len, &dlen); | |
2924b0eb JM |
177 | else |
178 | decrypted = ccmp_decrypt(bss->gtk[keyid], hdr, data, len, | |
179 | &dlen); | |
2edd5c23 | 180 | if (decrypted) { |
ee3b84be | 181 | rx_data_process(wt, bss->bssid, NULL, dst, src, decrypted, |
244c9303 | 182 | dlen, 1, NULL); |
2edd5c23 | 183 | os_memcpy(bss->rsc[keyid], pn, 6); |
64f45d07 JM |
184 | write_pcap_decrypted(wt, (const u8 *) hdr, 24 + (qos ? 2 : 0), |
185 | decrypted, dlen); | |
2edd5c23 | 186 | } |
07d0a5be | 187 | os_free(decrypted); |
d318c534 JM |
188 | } |
189 | ||
190 | ||
32234bba JM |
191 | static void rx_data_bss_prot(struct wlantest *wt, |
192 | const struct ieee80211_hdr *hdr, const u8 *qos, | |
193 | const u8 *dst, const u8 *src, const u8 *data, | |
194 | size_t len) | |
195 | { | |
d318c534 | 196 | struct wlantest_bss *bss; |
b39f5834 | 197 | struct wlantest_sta *sta, *sta2; |
d318c534 JM |
198 | int keyid; |
199 | u16 fc = le_to_host16(hdr->frame_control); | |
200 | u8 *decrypted; | |
201 | size_t dlen; | |
2edd5c23 JM |
202 | int tid; |
203 | u8 pn[6], *rsc; | |
b39f5834 JM |
204 | struct wlantest_tdls *tdls = NULL; |
205 | const u8 *tk = NULL; | |
d318c534 JM |
206 | |
207 | if (hdr->addr1[0] & 0x01) { | |
208 | rx_data_bss_prot_group(wt, hdr, qos, dst, src, data, len); | |
209 | return; | |
210 | } | |
211 | ||
212 | if (fc & WLAN_FC_TODS) { | |
213 | bss = bss_get(wt, hdr->addr1); | |
214 | if (bss == NULL) | |
215 | return; | |
216 | sta = sta_get(bss, hdr->addr2); | |
0a9ddd92 JM |
217 | if (sta) |
218 | sta->counters[WLANTEST_STA_COUNTER_PROT_DATA_TX]++; | |
b39f5834 | 219 | } else if (fc & WLAN_FC_FROMDS) { |
d318c534 JM |
220 | bss = bss_get(wt, hdr->addr2); |
221 | if (bss == NULL) | |
222 | return; | |
223 | sta = sta_get(bss, hdr->addr1); | |
b39f5834 JM |
224 | } else { |
225 | bss = bss_get(wt, hdr->addr3); | |
226 | if (bss == NULL) | |
227 | return; | |
228 | sta = sta_find(bss, hdr->addr2); | |
229 | sta2 = sta_find(bss, hdr->addr1); | |
230 | if (sta == NULL || sta2 == NULL) | |
231 | return; | |
232 | dl_list_for_each(tdls, &bss->tdls, struct wlantest_tdls, list) | |
233 | { | |
234 | if ((tdls->init == sta && tdls->resp == sta2) || | |
235 | (tdls->init == sta2 && tdls->resp == sta)) { | |
236 | if (!tdls->link_up) | |
237 | wpa_printf(MSG_DEBUG, "TDLS: Link not " | |
238 | "up, but Data frame seen"); | |
239 | tk = tdls->tpk.tk; | |
240 | break; | |
241 | } | |
242 | } | |
d318c534 | 243 | } |
2e479416 JM |
244 | if ((sta == NULL || |
245 | (!sta->ptk_set && sta->pairwise_cipher != WPA_CIPHER_WEP40)) && | |
246 | tk == NULL) { | |
d318c534 JM |
247 | wpa_printf(MSG_MSGDUMP, "No PTK known to decrypt the frame"); |
248 | return; | |
249 | } | |
250 | ||
251 | if (len < 4) { | |
252 | wpa_printf(MSG_INFO, "Too short encrypted data frame"); | |
253 | return; | |
254 | } | |
255 | ||
20062114 JM |
256 | if (sta->pairwise_cipher & (WPA_CIPHER_TKIP | WPA_CIPHER_CCMP) && |
257 | !(data[3] & 0x20)) { | |
258 | wpa_printf(MSG_INFO, "Expected TKIP/CCMP frame from " | |
259 | MACSTR " did not have ExtIV bit set to 1", | |
260 | MAC2STR(src)); | |
261 | return; | |
262 | } | |
263 | ||
b39f5834 | 264 | if (tk == NULL && sta->pairwise_cipher == WPA_CIPHER_TKIP) { |
16b8b6ea JM |
265 | if (data[3] & 0x1f) { |
266 | wpa_printf(MSG_INFO, "TKIP frame from " MACSTR " used " | |
267 | "non-zero reserved bit", | |
268 | MAC2STR(hdr->addr2)); | |
269 | } | |
270 | if (data[1] != ((data[0] | 0x20) & 0x7f)) { | |
271 | wpa_printf(MSG_INFO, "TKIP frame from " MACSTR " used " | |
272 | "incorrect WEPSeed[1] (was 0x%x, expected " | |
273 | "0x%x)", | |
274 | MAC2STR(hdr->addr2), data[1], | |
275 | (data[0] | 0x20) & 0x7f); | |
276 | } | |
b39f5834 | 277 | } else if (tk || sta->pairwise_cipher == WPA_CIPHER_CCMP) { |
16b8b6ea JM |
278 | if (data[2] != 0 || (data[3] & 0x1f) != 0) { |
279 | wpa_printf(MSG_INFO, "CCMP frame from " MACSTR " used " | |
280 | "non-zero reserved bit", | |
281 | MAC2STR(hdr->addr2)); | |
282 | } | |
283 | } | |
284 | ||
d318c534 JM |
285 | keyid = data[3] >> 6; |
286 | if (keyid != 0) { | |
287 | wpa_printf(MSG_INFO, "Unexpected non-zero KeyID %d in " | |
288 | "individually addressed Data frame from " MACSTR, | |
289 | keyid, MAC2STR(hdr->addr2)); | |
290 | } | |
291 | ||
2edd5c23 JM |
292 | if (qos) |
293 | tid = qos[0] & 0x0f; | |
294 | else | |
295 | tid = 0; | |
b39f5834 JM |
296 | if (tk) { |
297 | if (os_memcmp(hdr->addr2, tdls->init->addr, ETH_ALEN) == 0) | |
298 | rsc = tdls->rsc_init[tid]; | |
299 | else | |
300 | rsc = tdls->rsc_resp[tid]; | |
301 | } else if (fc & WLAN_FC_TODS) | |
2edd5c23 JM |
302 | rsc = sta->rsc_tods[tid]; |
303 | else | |
304 | rsc = sta->rsc_fromds[tid]; | |
305 | ||
306 | ||
b39f5834 | 307 | if (tk == NULL && sta->pairwise_cipher == WPA_CIPHER_TKIP) |
4dac8453 | 308 | tkip_get_pn(pn, data); |
2e479416 JM |
309 | else if (sta->pairwise_cipher == WPA_CIPHER_WEP40) |
310 | goto skip_replay_det; | |
4dac8453 JM |
311 | else |
312 | ccmp_get_pn(pn, data); | |
2edd5c23 | 313 | if (os_memcmp(pn, rsc, 6) <= 0) { |
01b397dd JM |
314 | u16 seq_ctrl = le_to_host16(hdr->seq_ctrl); |
315 | wpa_printf(MSG_INFO, "CCMP/TKIP replay detected: A1=" MACSTR | |
316 | " A2=" MACSTR " A3=" MACSTR " seq=%u frag=%u", | |
317 | MAC2STR(hdr->addr1), MAC2STR(hdr->addr2), | |
318 | MAC2STR(hdr->addr3), | |
319 | WLAN_GET_SEQ_SEQ(seq_ctrl), | |
320 | WLAN_GET_SEQ_FRAG(seq_ctrl)); | |
2edd5c23 JM |
321 | wpa_hexdump(MSG_INFO, "RX PN", pn, 6); |
322 | wpa_hexdump(MSG_INFO, "RSC", rsc, 6); | |
323 | } | |
324 | ||
2e479416 | 325 | skip_replay_det: |
b39f5834 JM |
326 | if (tk) |
327 | decrypted = ccmp_decrypt(tk, hdr, data, len, &dlen); | |
328 | else if (sta->pairwise_cipher == WPA_CIPHER_TKIP) | |
2924b0eb | 329 | decrypted = tkip_decrypt(sta->ptk.tk1, hdr, data, len, &dlen); |
2e479416 JM |
330 | else if (sta->pairwise_cipher == WPA_CIPHER_WEP40) |
331 | decrypted = wep_decrypt(wt, hdr, data, len, &dlen); | |
2924b0eb JM |
332 | else |
333 | decrypted = ccmp_decrypt(sta->ptk.tk1, hdr, data, len, &dlen); | |
2edd5c23 | 334 | if (decrypted) { |
244c9303 | 335 | u16 fc = le_to_host16(hdr->frame_control); |
9559a7f8 | 336 | const u8 *peer_addr = NULL; |
244c9303 JM |
337 | if (!(fc & (WLAN_FC_FROMDS | WLAN_FC_TODS))) |
338 | peer_addr = hdr->addr1; | |
d0b251d2 | 339 | os_memcpy(rsc, pn, 6); |
ee3b84be | 340 | rx_data_process(wt, bss->bssid, sta->addr, dst, src, decrypted, |
244c9303 | 341 | dlen, 1, peer_addr); |
64f45d07 JM |
342 | write_pcap_decrypted(wt, (const u8 *) hdr, 24 + (qos ? 2 : 0), |
343 | decrypted, dlen); | |
2edd5c23 | 344 | } |
d318c534 | 345 | os_free(decrypted); |
32234bba JM |
346 | } |
347 | ||
348 | ||
349 | static void rx_data_bss(struct wlantest *wt, const struct ieee80211_hdr *hdr, | |
350 | const u8 *qos, const u8 *dst, const u8 *src, | |
351 | const u8 *data, size_t len) | |
352 | { | |
353 | u16 fc = le_to_host16(hdr->frame_control); | |
354 | int prot = !!(fc & WLAN_FC_ISWEP); | |
355 | ||
356 | if (qos) { | |
357 | u8 ack = (qos[0] & 0x60) >> 5; | |
358 | wpa_printf(MSG_MSGDUMP, "BSS DATA: " MACSTR " -> " MACSTR | |
359 | " len=%u%s tid=%u%s%s", | |
360 | MAC2STR(src), MAC2STR(dst), (unsigned int) len, | |
361 | prot ? " Prot" : "", qos[0] & 0x0f, | |
362 | (qos[0] & 0x10) ? " EOSP" : "", | |
363 | ack == 0 ? "" : | |
364 | (ack == 1 ? " NoAck" : | |
365 | (ack == 2 ? " NoExpAck" : " BA"))); | |
366 | } else { | |
367 | wpa_printf(MSG_MSGDUMP, "BSS DATA: " MACSTR " -> " MACSTR | |
368 | " len=%u%s", | |
369 | MAC2STR(src), MAC2STR(dst), (unsigned int) len, | |
370 | prot ? " Prot" : ""); | |
371 | } | |
372 | ||
373 | if (prot) | |
374 | rx_data_bss_prot(wt, hdr, qos, dst, src, data, len); | |
ee3b84be | 375 | else { |
244c9303 | 376 | const u8 *bssid, *sta_addr, *peer_addr; |
ee3b84be JM |
377 | if (fc & WLAN_FC_TODS) { |
378 | bssid = hdr->addr1; | |
379 | sta_addr = hdr->addr2; | |
244c9303 JM |
380 | peer_addr = NULL; |
381 | } else if (fc & WLAN_FC_FROMDS) { | |
ee3b84be JM |
382 | bssid = hdr->addr2; |
383 | sta_addr = hdr->addr1; | |
244c9303 JM |
384 | peer_addr = NULL; |
385 | } else { | |
386 | bssid = hdr->addr3; | |
387 | sta_addr = hdr->addr2; | |
388 | peer_addr = hdr->addr1; | |
ee3b84be | 389 | } |
244c9303 JM |
390 | rx_data_process(wt, bssid, sta_addr, dst, src, data, len, 0, |
391 | peer_addr); | |
ee3b84be | 392 | } |
32234bba JM |
393 | } |
394 | ||
395 | ||
0e42fff3 JM |
396 | static struct wlantest_tdls * get_tdls(struct wlantest *wt, const u8 *bssid, |
397 | const u8 *sta1_addr, | |
398 | const u8 *sta2_addr) | |
399 | { | |
400 | struct wlantest_bss *bss; | |
401 | struct wlantest_sta *sta1, *sta2; | |
402 | struct wlantest_tdls *tdls; | |
403 | ||
404 | bss = bss_find(wt, bssid); | |
405 | if (bss == NULL) | |
406 | return NULL; | |
407 | sta1 = sta_find(bss, sta1_addr); | |
408 | if (sta1 == NULL) | |
409 | return NULL; | |
410 | sta2 = sta_find(bss, sta2_addr); | |
411 | if (sta2 == NULL) | |
412 | return NULL; | |
413 | ||
414 | dl_list_for_each(tdls, &bss->tdls, struct wlantest_tdls, list) { | |
415 | if ((tdls->init == sta1 && tdls->resp == sta2) || | |
416 | (tdls->init == sta2 && tdls->resp == sta1)) | |
417 | return tdls; | |
418 | } | |
419 | ||
420 | return NULL; | |
421 | } | |
422 | ||
423 | ||
424 | static void add_direct_link(struct wlantest *wt, const u8 *bssid, | |
425 | const u8 *sta1_addr, const u8 *sta2_addr) | |
426 | { | |
427 | struct wlantest_tdls *tdls; | |
428 | ||
429 | tdls = get_tdls(wt, bssid, sta1_addr, sta2_addr); | |
430 | if (tdls == NULL) | |
431 | return; | |
432 | ||
433 | if (tdls->link_up) | |
434 | tdls->counters[WLANTEST_TDLS_COUNTER_VALID_DIRECT_LINK]++; | |
435 | else | |
436 | tdls->counters[WLANTEST_TDLS_COUNTER_INVALID_DIRECT_LINK]++; | |
437 | } | |
438 | ||
439 | ||
440 | static void add_ap_path(struct wlantest *wt, const u8 *bssid, | |
441 | const u8 *sta1_addr, const u8 *sta2_addr) | |
442 | { | |
443 | struct wlantest_tdls *tdls; | |
444 | ||
445 | tdls = get_tdls(wt, bssid, sta1_addr, sta2_addr); | |
446 | if (tdls == NULL) | |
447 | return; | |
448 | ||
449 | if (tdls->link_up) | |
450 | tdls->counters[WLANTEST_TDLS_COUNTER_INVALID_AP_PATH]++; | |
451 | else | |
452 | tdls->counters[WLANTEST_TDLS_COUNTER_VALID_AP_PATH]++; | |
453 | } | |
454 | ||
455 | ||
2d73f0a8 JM |
456 | void rx_data(struct wlantest *wt, const u8 *data, size_t len) |
457 | { | |
458 | const struct ieee80211_hdr *hdr; | |
32234bba JM |
459 | u16 fc, stype; |
460 | size_t hdrlen; | |
461 | const u8 *qos = NULL; | |
2d73f0a8 JM |
462 | |
463 | if (len < 24) | |
464 | return; | |
465 | ||
466 | hdr = (const struct ieee80211_hdr *) data; | |
467 | fc = le_to_host16(hdr->frame_control); | |
32234bba JM |
468 | stype = WLAN_FC_GET_STYPE(fc); |
469 | hdrlen = 24; | |
470 | if ((fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) == | |
471 | (WLAN_FC_TODS | WLAN_FC_FROMDS)) | |
472 | hdrlen += ETH_ALEN; | |
473 | if (stype & 0x08) { | |
474 | qos = data + hdrlen; | |
475 | hdrlen += 2; | |
476 | } | |
477 | if (len < hdrlen) | |
478 | return; | |
2d73f0a8 JM |
479 | wt->rx_data++; |
480 | ||
481 | switch (fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) { | |
482 | case 0: | |
483 | wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s IBSS DA=" MACSTR " SA=" | |
484 | MACSTR " BSSID=" 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_direct_link(wt, hdr->addr3, hdr->addr1, hdr->addr2); |
b39f5834 JM |
491 | rx_data_bss(wt, hdr, qos, hdr->addr1, hdr->addr2, |
492 | data + hdrlen, len - hdrlen); | |
2d73f0a8 JM |
493 | break; |
494 | case WLAN_FC_FROMDS: | |
495 | wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s FromDS DA=" MACSTR | |
496 | " BSSID=" 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)); | |
0e42fff3 | 502 | add_ap_path(wt, hdr->addr2, hdr->addr1, hdr->addr3); |
39c14726 | 503 | rx_data_bss(wt, hdr, qos, hdr->addr1, hdr->addr3, |
32234bba | 504 | data + hdrlen, len - hdrlen); |
2d73f0a8 JM |
505 | break; |
506 | case WLAN_FC_TODS: | |
507 | wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s ToDS BSSID=" MACSTR | |
508 | " SA=" MACSTR " DA=" MACSTR, | |
509 | data_stype(WLAN_FC_GET_STYPE(fc)), | |
510 | fc & WLAN_FC_PWRMGT ? " PwrMgt" : "", | |
511 | fc & WLAN_FC_ISWEP ? " Prot" : "", | |
512 | MAC2STR(hdr->addr1), MAC2STR(hdr->addr2), | |
513 | MAC2STR(hdr->addr3)); | |
0e42fff3 | 514 | add_ap_path(wt, hdr->addr1, hdr->addr3, hdr->addr2); |
32234bba JM |
515 | rx_data_bss(wt, hdr, qos, hdr->addr3, hdr->addr2, |
516 | data + hdrlen, len - hdrlen); | |
2d73f0a8 JM |
517 | break; |
518 | case WLAN_FC_TODS | WLAN_FC_FROMDS: | |
519 | wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s WDS RA=" MACSTR " TA=" | |
520 | MACSTR " DA=" MACSTR " SA=" MACSTR, | |
521 | data_stype(WLAN_FC_GET_STYPE(fc)), | |
522 | fc & WLAN_FC_PWRMGT ? " PwrMgt" : "", | |
523 | fc & WLAN_FC_ISWEP ? " Prot" : "", | |
524 | MAC2STR(hdr->addr1), MAC2STR(hdr->addr2), | |
525 | MAC2STR(hdr->addr3), | |
526 | MAC2STR((const u8 *) (hdr + 1))); | |
527 | break; | |
528 | } | |
529 | } |